drivers/net/ethernet/intel/i40e/i40e_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2016 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include <linux/etherdevice.h>
  28 #include <linux/of_net.h>
  29 #include <linux/pci.h>
  30
  31 /* Local includes */
  32 #include "i40e.h"
  33 #include "i40e_diag.h"
  34 #include <net/udp_tunnel.h>
  35
  36 const char i40e_driver_name[] = "i40e";
  37 static const char i40e_driver_string[] =
  38                         "Intel(R) Ethernet Connection XL710 Network Driver";
  39
  40 #define DRV_KERN "-k"
  41
  42 #define DRV_VERSION_MAJOR 2
  43 #define DRV_VERSION_MINOR 1
  44 #define DRV_VERSION_BUILD 7
  45 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  46              __stringify(DRV_VERSION_MINOR) "." \
  47              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  48 const char i40e_driver_version_str[] = DRV_VERSION;
  49 static const char i40e_copyright[] = "Copyright (c) 2013 - 2014 Intel Corporation.";
  50
  51 /* a bit of forward declarations */
  52 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  53 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  54 static int i40e_add_vsi(struct i40e_vsi *vsi);
  55 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  56 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  57 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  58 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  59 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  60 static void i40e_fdir_sb_setup(struct i40e_pf *pf);
  61 static int i40e_veb_get_bw_info(struct i40e_veb *veb);
  62
  63 /* i40e_pci_tbl - PCI Device ID Table
  64  *
  65  * Last entry must be all 0s
  66  *
  67  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  68  *   Class, Class Mask, private data (not used) }
  69  */
  70 static const struct pci_device_id i40e_pci_tbl[] = {
  71         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
  72         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
  73         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
  74         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
  75         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_A), 0},
  76         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_B), 0},
  77         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_C), 0},
  78         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T), 0},
  79         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T4), 0},
  80         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_X722), 0},
  81         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_X722), 0},
  82         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X722), 0},
  83         {PCI_VDEVICE(INTEL, I40E_DEV_ID_1G_BASE_T_X722), 0},
  84         {PCI_VDEVICE(INTEL, I40E_DEV_ID_10G_BASE_T_X722), 0},
  85         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_I_X722), 0},
  86         {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2), 0},
  87         {PCI_VDEVICE(INTEL, I40E_DEV_ID_20G_KR2_A), 0},
  88         {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_B), 0},
  89         {PCI_VDEVICE(INTEL, I40E_DEV_ID_25G_SFP28), 0},
  90         /* required last entry */
  91         {0, }
  92 };
  93 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  94
  95 #define I40E_MAX_VF_COUNT 128
  96 static int debug = -1;
  97 module_param(debug, uint, 0);
  98 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all), Debug mask (0x8XXXXXXX)");
  99
 100 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
 101 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
 102 MODULE_LICENSE("GPL");
 103 MODULE_VERSION(DRV_VERSION);
 104
 105 static struct workqueue_struct *i40e_wq;
 106
 107 /**
 108  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
 109  * @hw:   pointer to the HW structure
 110  * @mem:  ptr to mem struct to fill out
 111  * @size: size of memory requested
 112  * @alignment: what to align the allocation to
 113  **/
 114 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
 115                             u64 size, u32 alignment)
 116 {
 117         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 118
 119         mem->size = ALIGN(size, alignment);
 120         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 121                                       &mem->pa, GFP_KERNEL);
 122         if (!mem->va)
 123                 return -ENOMEM;
 124
 125         return 0;
 126 }
 127
 128 /**
 129  * i40e_free_dma_mem_d - OS specific memory free for shared code
 130  * @hw:   pointer to the HW structure
 131  * @mem:  ptr to mem struct to free
 132  **/
 133 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 134 {
 135         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 136
 137         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 138         mem->va = NULL;
 139         mem->pa = 0;
 140         mem->size = 0;
 141
 142         return 0;
 143 }
 144
 145 /**
 146  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 147  * @hw:   pointer to the HW structure
 148  * @mem:  ptr to mem struct to fill out
 149  * @size: size of memory requested
 150  **/
 151 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 152                              u32 size)
 153 {
 154         mem->size = size;
 155         mem->va = kzalloc(size, GFP_KERNEL);
 156
 157         if (!mem->va)
 158                 return -ENOMEM;
 159
 160         return 0;
 161 }
 162
 163 /**
 164  * i40e_free_virt_mem_d - OS specific memory free for shared code
 165  * @hw:   pointer to the HW structure
 166  * @mem:  ptr to mem struct to free
 167  **/
 168 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 169 {
 170         /* it's ok to kfree a NULL pointer */
 171         kfree(mem->va);
 172         mem->va = NULL;
 173         mem->size = 0;
 174
 175         return 0;
 176 }
 177
 178 /**
 179  * i40e_get_lump - find a lump of free generic resource
 180  * @pf: board private structure
 181  * @pile: the pile of resource to search
 182  * @needed: the number of items needed
 183  * @id: an owner id to stick on the items assigned
 184  *
 185  * Returns the base item index of the lump, or negative for error
 186  *
 187  * The search_hint trick and lack of advanced fit-finding only work
 188  * because we're highly likely to have all the same size lump requests.
 189  * Linear search time and any fragmentation should be minimal.
 190  **/
 191 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 192                          u16 needed, u16 id)
 193 {
 194         int ret = -ENOMEM;
 195         int i, j;
 196
 197         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 198                 dev_info(&pf->pdev->dev,
 199                          "param err: pile=%p needed=%d id=0x%04x\n",
 200                          pile, needed, id);
 201                 return -EINVAL;
 202         }
 203
 204         /* start the linear search with an imperfect hint */
 205         i = pile->search_hint;
 206         while (i < pile->num_entries) {
 207                 /* skip already allocated entries */
 208                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 209                         i++;
 210                         continue;
 211                 }
 212
 213                 /* do we have enough in this lump? */
 214                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 215                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 216                                 break;
 217                 }
 218
 219                 if (j == needed) {
 220                         /* there was enough, so assign it to the requestor */
 221                         for (j = 0; j < needed; j++)
 222                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 223                         ret = i;
 224                         pile->search_hint = i + j;
 225                         break;
 226                 }
 227
 228                 /* not enough, so skip over it and continue looking */
 229                 i += j;
 230         }
 231
 232         return ret;
 233 }
 234
 235 /**
 236  * i40e_put_lump - return a lump of generic resource
 237  * @pile: the pile of resource to search
 238  * @index: the base item index
 239  * @id: the owner id of the items assigned
 240  *
 241  * Returns the count of items in the lump
 242  **/
 243 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 244 {
 245         int valid_id = (id | I40E_PILE_VALID_BIT);
 246         int count = 0;
 247         int i;
 248
 249         if (!pile || index >= pile->num_entries)
 250                 return -EINVAL;
 251
 252         for (i = index;
 253              i < pile->num_entries && pile->list[i] == valid_id;
 254              i++) {
 255                 pile->list[i] = 0;
 256                 count++;
 257         }
 258
 259         if (count && index < pile->search_hint)
 260                 pile->search_hint = index;
 261
 262         return count;
 263 }
 264
 265 /**
 266  * i40e_find_vsi_from_id - searches for the vsi with the given id
 267  * @pf - the pf structure to search for the vsi
 268  * @id - id of the vsi it is searching for
 269  **/
 270 struct i40e_vsi *i40e_find_vsi_from_id(struct i40e_pf *pf, u16 id)
 271 {
 272         int i;
 273
 274         for (i = 0; i < pf->num_alloc_vsi; i++)
 275                 if (pf->vsi[i] && (pf->vsi[i]->id == id))
 276                         return pf->vsi[i];
 277
 278         return NULL;
 279 }
 280
 281 /**
 282  * i40e_service_event_schedule - Schedule the service task to wake up
 283  * @pf: board private structure
 284  *
 285  * If not already scheduled, this puts the task into the work queue
 286  **/
 287 void i40e_service_event_schedule(struct i40e_pf *pf)
 288 {
 289         if (!test_bit(__I40E_DOWN, &pf->state) &&
 290             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
 291                 queue_work(i40e_wq, &pf->service_task);
 292 }
 293
 294 /**
 295  * i40e_tx_timeout - Respond to a Tx Hang
 296  * @netdev: network interface device structure
 297  *
 298  * If any port has noticed a Tx timeout, it is likely that the whole
 299  * device is munged, not just the one netdev port, so go for the full
 300  * reset.
 301  **/
 302 #ifdef I40E_FCOE
 303 void i40e_tx_timeout(struct net_device *netdev)
 304 #else
 305 static void i40e_tx_timeout(struct net_device *netdev)
 306 #endif
 307 {
 308         struct i40e_netdev_priv *np = netdev_priv(netdev);
 309         struct i40e_vsi *vsi = np->vsi;
 310         struct i40e_pf *pf = vsi->back;
 311         struct i40e_ring *tx_ring = NULL;
 312         unsigned int i, hung_queue = 0;
 313         u32 head, val;
 314
 315         pf->tx_timeout_count++;
 316
 317         /* find the stopped queue the same way the stack does */
 318         for (i = 0; i < netdev->num_tx_queues; i++) {
 319                 struct netdev_queue *q;
 320                 unsigned long trans_start;
 321
 322                 q = netdev_get_tx_queue(netdev, i);
 323                 trans_start = q->trans_start;
 324                 if (netif_xmit_stopped(q) &&
 325                     time_after(jiffies,
 326                                (trans_start + netdev->watchdog_timeo))) {
 327                         hung_queue = i;
 328                         break;
 329                 }
 330         }
 331
 332         if (i == netdev->num_tx_queues) {
 333                 netdev_info(netdev, "tx_timeout: no netdev hung queue found\n");
 334         } else {
 335                 /* now that we have an index, find the tx_ring struct */
 336                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 337                         if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
 338                                 if (hung_queue ==
 339                                     vsi->tx_rings[i]->queue_index) {
 340                                         tx_ring = vsi->tx_rings[i];
 341                                         break;
 342                                 }
 343                         }
 344                 }
 345         }
 346
 347         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 348                 pf->tx_timeout_recovery_level = 1;  /* reset after some time */
 349         else if (time_before(jiffies,
 350                       (pf->tx_timeout_last_recovery + netdev->watchdog_timeo)))
 351                 return;   /* don't do any new action before the next timeout */
 352
 353         if (tx_ring) {
 354                 head = i40e_get_head(tx_ring);
 355                 /* Read interrupt register */
 356                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
 357                         val = rd32(&pf->hw,
 358                              I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
 359                                                 tx_ring->vsi->base_vector - 1));
 360                 else
 361                         val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);
 362
 363                 netdev_info(netdev, "tx_timeout: VSI_seid: %d, Q %d, NTC: 0x%x, HWB: 0x%x, NTU: 0x%x, TAIL: 0x%x, INT: 0x%x\n",
 364                             vsi->seid, hung_queue, tx_ring->next_to_clean,
 365                             head, tx_ring->next_to_use,
 366                             readl(tx_ring->tail), val);
 367         }
 368
 369         pf->tx_timeout_last_recovery = jiffies;
 370         netdev_info(netdev, "tx_timeout recovery level %d, hung_queue %d\n",
 371                     pf->tx_timeout_recovery_level, hung_queue);
 372
 373         switch (pf->tx_timeout_recovery_level) {
 374         case 1:
 375                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 376                 break;
 377         case 2:
 378                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 379                 break;
 380         case 3:
 381                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 382                 break;
 383         default:
 384                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 385                 break;
 386         }
 387
 388         i40e_service_event_schedule(pf);
 389         pf->tx_timeout_recovery_level++;
 390 }
 391
 392 /**
 393  * i40e_get_vsi_stats_struct - Get System Network Statistics
 394  * @vsi: the VSI we care about
 395  *
 396  * Returns the address of the device statistics structure.
 397  * The statistics are actually updated from the service task.
 398  **/
 399 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 400 {
 401         return &vsi->net_stats;
 402 }
 403
 404 /**
 405  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 406  * @netdev: network interface device structure
 407  *
 408  * Returns the address of the device statistics structure.
 409  * The statistics are actually updated from the service task.
 410  **/
 411 #ifndef I40E_FCOE
 412 static
 413 #endif
 414 void i40e_get_netdev_stats_struct(struct net_device *netdev,
 415                                   struct rtnl_link_stats64 *stats)
 416 {
 417         struct i40e_netdev_priv *np = netdev_priv(netdev);
 418         struct i40e_ring *tx_ring, *rx_ring;
 419         struct i40e_vsi *vsi = np->vsi;
 420         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 421         int i;
 422
 423         if (test_bit(__I40E_DOWN, &vsi->state))
 424                 return;
 425
 426         if (!vsi->tx_rings)
 427                 return;
 428
 429         rcu_read_lock();
 430         for (i = 0; i < vsi->num_queue_pairs; i++) {
 431                 u64 bytes, packets;
 432                 unsigned int start;
 433
 434                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 435                 if (!tx_ring)
 436                         continue;
 437
 438                 do {
 439                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
 440                         packets = tx_ring->stats.packets;
 441                         bytes   = tx_ring->stats.bytes;
 442                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
 443
 444                 stats->tx_packets += packets;
 445                 stats->tx_bytes   += bytes;
 446                 rx_ring = &tx_ring[1];
 447
 448                 do {
 449                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
 450                         packets = rx_ring->stats.packets;
 451                         bytes   = rx_ring->stats.bytes;
 452                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
 453
 454                 stats->rx_packets += packets;
 455                 stats->rx_bytes   += bytes;
 456         }
 457         rcu_read_unlock();
 458
 459         /* following stats updated by i40e_watchdog_subtask() */
 460         stats->multicast        = vsi_stats->multicast;
 461         stats->tx_errors        = vsi_stats->tx_errors;
 462         stats->tx_dropped       = vsi_stats->tx_dropped;
 463         stats->rx_errors        = vsi_stats->rx_errors;
 464         stats->rx_dropped       = vsi_stats->rx_dropped;
 465         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 466         stats->rx_length_errors = vsi_stats->rx_length_errors;
 467 }
 468
 469 /**
 470  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 471  * @vsi: the VSI to have its stats reset
 472  **/
 473 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 474 {
 475         struct rtnl_link_stats64 *ns;
 476         int i;
 477
 478         if (!vsi)
 479                 return;
 480
 481         ns = i40e_get_vsi_stats_struct(vsi);
 482         memset(ns, 0, sizeof(*ns));
 483         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 484         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 485         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 486         if (vsi->rx_rings && vsi->rx_rings[0]) {
 487                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 488                         memset(&vsi->rx_rings[i]->stats, 0,
 489                                sizeof(vsi->rx_rings[i]->stats));
 490                         memset(&vsi->rx_rings[i]->rx_stats, 0,
 491                                sizeof(vsi->rx_rings[i]->rx_stats));
 492                         memset(&vsi->tx_rings[i]->stats, 0,
 493                                sizeof(vsi->tx_rings[i]->stats));
 494                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 495                                sizeof(vsi->tx_rings[i]->tx_stats));
 496                 }
 497         }
 498         vsi->stat_offsets_loaded = false;
 499 }
 500
 501 /**
 502  * i40e_pf_reset_stats - Reset all of the stats for the given PF
 503  * @pf: the PF to be reset
 504  **/
 505 void i40e_pf_reset_stats(struct i40e_pf *pf)
 506 {
 507         int i;
 508
 509         memset(&pf->stats, 0, sizeof(pf->stats));
 510         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 511         pf->stat_offsets_loaded = false;
 512
 513         for (i = 0; i < I40E_MAX_VEB; i++) {
 514                 if (pf->veb[i]) {
 515                         memset(&pf->veb[i]->stats, 0,
 516                                sizeof(pf->veb[i]->stats));
 517                         memset(&pf->veb[i]->stats_offsets, 0,
 518                                sizeof(pf->veb[i]->stats_offsets));
 519                         pf->veb[i]->stat_offsets_loaded = false;
 520                 }
 521         }
 522         pf->hw_csum_rx_error = 0;
 523 }
 524
 525 /**
 526  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 527  * @hw: ptr to the hardware info
 528  * @hireg: the high 32 bit reg to read
 529  * @loreg: the low 32 bit reg to read
 530  * @offset_loaded: has the initial offset been loaded yet
 531  * @offset: ptr to current offset value
 532  * @stat: ptr to the stat
 533  *
 534  * Since the device stats are not reset at PFReset, they likely will not
 535  * be zeroed when the driver starts.  We'll save the first values read
 536  * and use them as offsets to be subtracted from the raw values in order
 537  * to report stats that count from zero.  In the process, we also manage
 538  * the potential roll-over.
 539  **/
 540 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 541                                bool offset_loaded, u64 *offset, u64 *stat)
 542 {
 543         u64 new_data;
 544
 545         if (hw->device_id == I40E_DEV_ID_QEMU) {
 546                 new_data = rd32(hw, loreg);
 547                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 548         } else {
 549                 new_data = rd64(hw, loreg);
 550         }
 551         if (!offset_loaded)
 552                 *offset = new_data;
 553         if (likely(new_data >= *offset))
 554                 *stat = new_data - *offset;
 555         else
 556                 *stat = (new_data + BIT_ULL(48)) - *offset;
 557         *stat &= 0xFFFFFFFFFFFFULL;
 558 }
 559
 560 /**
 561  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 562  * @hw: ptr to the hardware info
 563  * @reg: the hw reg to read
 564  * @offset_loaded: has the initial offset been loaded yet
 565  * @offset: ptr to current offset value
 566  * @stat: ptr to the stat
 567  **/
 568 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 569                                bool offset_loaded, u64 *offset, u64 *stat)
 570 {
 571         u32 new_data;
 572
 573         new_data = rd32(hw, reg);
 574         if (!offset_loaded)
 575                 *offset = new_data;
 576         if (likely(new_data >= *offset))
 577                 *stat = (u32)(new_data - *offset);
 578         else
 579                 *stat = (u32)((new_data + BIT_ULL(32)) - *offset);
 580 }
 581
 582 /**
 583  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 584  * @vsi: the VSI to be updated
 585  **/
 586 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 587 {
 588         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 589         struct i40e_pf *pf = vsi->back;
 590         struct i40e_hw *hw = &pf->hw;
 591         struct i40e_eth_stats *oes;
 592         struct i40e_eth_stats *es;     /* device's eth stats */
 593
 594         es = &vsi->eth_stats;
 595         oes = &vsi->eth_stats_offsets;
 596
 597         /* Gather up the stats that the hw collects */
 598         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 599                            vsi->stat_offsets_loaded,
 600                            &oes->tx_errors, &es->tx_errors);
 601         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 602                            vsi->stat_offsets_loaded,
 603                            &oes->rx_discards, &es->rx_discards);
 604         i40e_stat_update32(hw, I40E_GLV_RUPP(stat_idx),
 605                            vsi->stat_offsets_loaded,
 606                            &oes->rx_unknown_protocol, &es->rx_unknown_protocol);
 607         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 608                            vsi->stat_offsets_loaded,
 609                            &oes->tx_errors, &es->tx_errors);
 610
 611         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 612                            I40E_GLV_GORCL(stat_idx),
 613                            vsi->stat_offsets_loaded,
 614                            &oes->rx_bytes, &es->rx_bytes);
 615         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 616                            I40E_GLV_UPRCL(stat_idx),
 617                            vsi->stat_offsets_loaded,
 618                            &oes->rx_unicast, &es->rx_unicast);
 619         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 620                            I40E_GLV_MPRCL(stat_idx),
 621                            vsi->stat_offsets_loaded,
 622                            &oes->rx_multicast, &es->rx_multicast);
 623         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 624                            I40E_GLV_BPRCL(stat_idx),
 625                            vsi->stat_offsets_loaded,
 626                            &oes->rx_broadcast, &es->rx_broadcast);
 627
 628         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 629                            I40E_GLV_GOTCL(stat_idx),
 630                            vsi->stat_offsets_loaded,
 631                            &oes->tx_bytes, &es->tx_bytes);
 632         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 633                            I40E_GLV_UPTCL(stat_idx),
 634                            vsi->stat_offsets_loaded,
 635                            &oes->tx_unicast, &es->tx_unicast);
 636         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 637                            I40E_GLV_MPTCL(stat_idx),
 638                            vsi->stat_offsets_loaded,
 639                            &oes->tx_multicast, &es->tx_multicast);
 640         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 641                            I40E_GLV_BPTCL(stat_idx),
 642                            vsi->stat_offsets_loaded,
 643                            &oes->tx_broadcast, &es->tx_broadcast);
 644         vsi->stat_offsets_loaded = true;
 645 }
 646
 647 /**
 648  * i40e_update_veb_stats - Update Switch component statistics
 649  * @veb: the VEB being updated
 650  **/
 651 static void i40e_update_veb_stats(struct i40e_veb *veb)
 652 {
 653         struct i40e_pf *pf = veb->pf;
 654         struct i40e_hw *hw = &pf->hw;
 655         struct i40e_eth_stats *oes;
 656         struct i40e_eth_stats *es;     /* device's eth stats */
 657         struct i40e_veb_tc_stats *veb_oes;
 658         struct i40e_veb_tc_stats *veb_es;
 659         int i, idx = 0;
 660
 661         idx = veb->stats_idx;
 662         es = &veb->stats;
 663         oes = &veb->stats_offsets;
 664         veb_es = &veb->tc_stats;
 665         veb_oes = &veb->tc_stats_offsets;
 666
 667         /* Gather up the stats that the hw collects */
 668         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 669                            veb->stat_offsets_loaded,
 670                            &oes->tx_discards, &es->tx_discards);
 671         if (hw->revision_id > 0)
 672                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 673                                    veb->stat_offsets_loaded,
 674                                    &oes->rx_unknown_protocol,
 675                                    &es->rx_unknown_protocol);
 676         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 677                            veb->stat_offsets_loaded,
 678                            &oes->rx_bytes, &es->rx_bytes);
 679         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 680                            veb->stat_offsets_loaded,
 681                            &oes->rx_unicast, &es->rx_unicast);
 682         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 683                            veb->stat_offsets_loaded,
 684                            &oes->rx_multicast, &es->rx_multicast);
 685         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 686                            veb->stat_offsets_loaded,
 687                            &oes->rx_broadcast, &es->rx_broadcast);
 688
 689         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 690                            veb->stat_offsets_loaded,
 691                            &oes->tx_bytes, &es->tx_bytes);
 692         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 693                            veb->stat_offsets_loaded,
 694                            &oes->tx_unicast, &es->tx_unicast);
 695         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 696                            veb->stat_offsets_loaded,
 697                            &oes->tx_multicast, &es->tx_multicast);
 698         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 699                            veb->stat_offsets_loaded,
 700                            &oes->tx_broadcast, &es->tx_broadcast);
 701         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
 702                 i40e_stat_update48(hw, I40E_GLVEBTC_RPCH(i, idx),
 703                                    I40E_GLVEBTC_RPCL(i, idx),
 704                                    veb->stat_offsets_loaded,
 705                                    &veb_oes->tc_rx_packets[i],
 706                                    &veb_es->tc_rx_packets[i]);
 707                 i40e_stat_update48(hw, I40E_GLVEBTC_RBCH(i, idx),
 708                                    I40E_GLVEBTC_RBCL(i, idx),
 709                                    veb->stat_offsets_loaded,
 710                                    &veb_oes->tc_rx_bytes[i],
 711                                    &veb_es->tc_rx_bytes[i]);
 712                 i40e_stat_update48(hw, I40E_GLVEBTC_TPCH(i, idx),
 713                                    I40E_GLVEBTC_TPCL(i, idx),
 714                                    veb->stat_offsets_loaded,
 715                                    &veb_oes->tc_tx_packets[i],
 716                                    &veb_es->tc_tx_packets[i]);
 717                 i40e_stat_update48(hw, I40E_GLVEBTC_TBCH(i, idx),
 718                                    I40E_GLVEBTC_TBCL(i, idx),
 719                                    veb->stat_offsets_loaded,
 720                                    &veb_oes->tc_tx_bytes[i],
 721                                    &veb_es->tc_tx_bytes[i]);
 722         }
 723         veb->stat_offsets_loaded = true;
 724 }
 725
 726 #ifdef I40E_FCOE
 727 /**
 728  * i40e_update_fcoe_stats - Update FCoE-specific ethernet statistics counters.
 729  * @vsi: the VSI that is capable of doing FCoE
 730  **/
 731 static void i40e_update_fcoe_stats(struct i40e_vsi *vsi)
 732 {
 733         struct i40e_pf *pf = vsi->back;
 734         struct i40e_hw *hw = &pf->hw;
 735         struct i40e_fcoe_stats *ofs;
 736         struct i40e_fcoe_stats *fs;     /* device's eth stats */
 737         int idx;
 738
 739         if (vsi->type != I40E_VSI_FCOE)
 740                 return;
 741
 742         idx = hw->pf_id + I40E_FCOE_PF_STAT_OFFSET;
 743         fs = &vsi->fcoe_stats;
 744         ofs = &vsi->fcoe_stats_offsets;
 745
 746         i40e_stat_update32(hw, I40E_GL_FCOEPRC(idx),
 747                            vsi->fcoe_stat_offsets_loaded,
 748                            &ofs->rx_fcoe_packets, &fs->rx_fcoe_packets);
 749         i40e_stat_update48(hw, I40E_GL_FCOEDWRCH(idx), I40E_GL_FCOEDWRCL(idx),
 750                            vsi->fcoe_stat_offsets_loaded,
 751                            &ofs->rx_fcoe_dwords, &fs->rx_fcoe_dwords);
 752         i40e_stat_update32(hw, I40E_GL_FCOERPDC(idx),
 753                            vsi->fcoe_stat_offsets_loaded,
 754                            &ofs->rx_fcoe_dropped, &fs->rx_fcoe_dropped);
 755         i40e_stat_update32(hw, I40E_GL_FCOEPTC(idx),
 756                            vsi->fcoe_stat_offsets_loaded,
 757                            &ofs->tx_fcoe_packets, &fs->tx_fcoe_packets);
 758         i40e_stat_update48(hw, I40E_GL_FCOEDWTCH(idx), I40E_GL_FCOEDWTCL(idx),
 759                            vsi->fcoe_stat_offsets_loaded,
 760                            &ofs->tx_fcoe_dwords, &fs->tx_fcoe_dwords);
 761         i40e_stat_update32(hw, I40E_GL_FCOECRC(idx),
 762                            vsi->fcoe_stat_offsets_loaded,
 763                            &ofs->fcoe_bad_fccrc, &fs->fcoe_bad_fccrc);
 764         i40e_stat_update32(hw, I40E_GL_FCOELAST(idx),
 765                            vsi->fcoe_stat_offsets_loaded,
 766                            &ofs->fcoe_last_error, &fs->fcoe_last_error);
 767         i40e_stat_update32(hw, I40E_GL_FCOEDDPC(idx),
 768                            vsi->fcoe_stat_offsets_loaded,
 769                            &ofs->fcoe_ddp_count, &fs->fcoe_ddp_count);
 770
 771         vsi->fcoe_stat_offsets_loaded = true;
 772 }
 773
 774 #endif
 775 /**
 776  * i40e_update_vsi_stats - Update the vsi statistics counters.
 777  * @vsi: the VSI to be updated
 778  *
 779  * There are a few instances where we store the same stat in a
 780  * couple of different structs.  This is partly because we have
 781  * the netdev stats that need to be filled out, which is slightly
 782  * different from the "eth_stats" defined by the chip and used in
 783  * VF communications.  We sort it out here.
 784  **/
 785 static void i40e_update_vsi_stats(struct i40e_vsi *vsi)
 786 {
 787         struct i40e_pf *pf = vsi->back;
 788         struct rtnl_link_stats64 *ons;
 789         struct rtnl_link_stats64 *ns;   /* netdev stats */
 790         struct i40e_eth_stats *oes;
 791         struct i40e_eth_stats *es;     /* device's eth stats */
 792         u32 tx_restart, tx_busy;
 793         u64 tx_lost_interrupt;
 794         struct i40e_ring *p;
 795         u32 rx_page, rx_buf;
 796         u64 bytes, packets;
 797         unsigned int start;
 798         u64 tx_linearize;
 799         u64 tx_force_wb;
 800         u64 rx_p, rx_b;
 801         u64 tx_p, tx_b;
 802         u16 q;
 803
 804         if (test_bit(__I40E_DOWN, &vsi->state) ||
 805             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 806                 return;
 807
 808         ns = i40e_get_vsi_stats_struct(vsi);
 809         ons = &vsi->net_stats_offsets;
 810         es = &vsi->eth_stats;
 811         oes = &vsi->eth_stats_offsets;
 812
 813         /* Gather up the netdev and vsi stats that the driver collects
 814          * on the fly during packet processing
 815          */
 816         rx_b = rx_p = 0;
 817         tx_b = tx_p = 0;
 818         tx_restart = tx_busy = tx_linearize = tx_force_wb = 0;
 819         tx_lost_interrupt = 0;
 820         rx_page = 0;
 821         rx_buf = 0;
 822         rcu_read_lock();
 823         for (q = 0; q < vsi->num_queue_pairs; q++) {
 824                 /* locate Tx ring */
 825                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 826
 827                 do {
 828                         start = u64_stats_fetch_begin_irq(&p->syncp);
 829                         packets = p->stats.packets;
 830                         bytes = p->stats.bytes;
 831                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 832                 tx_b += bytes;
 833                 tx_p += packets;
 834                 tx_restart += p->tx_stats.restart_queue;
 835                 tx_busy += p->tx_stats.tx_busy;
 836                 tx_linearize += p->tx_stats.tx_linearize;
 837                 tx_force_wb += p->tx_stats.tx_force_wb;
 838                 tx_lost_interrupt += p->tx_stats.tx_lost_interrupt;
 839
 840                 /* Rx queue is part of the same block as Tx queue */
 841                 p = &p[1];
 842                 do {
 843                         start = u64_stats_fetch_begin_irq(&p->syncp);
 844                         packets = p->stats.packets;
 845                         bytes = p->stats.bytes;
 846                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 847                 rx_b += bytes;
 848                 rx_p += packets;
 849                 rx_buf += p->rx_stats.alloc_buff_failed;
 850                 rx_page += p->rx_stats.alloc_page_failed;
 851         }
 852         rcu_read_unlock();
 853         vsi->tx_restart = tx_restart;
 854         vsi->tx_busy = tx_busy;
 855         vsi->tx_linearize = tx_linearize;
 856         vsi->tx_force_wb = tx_force_wb;
 857         vsi->tx_lost_interrupt = tx_lost_interrupt;
 858         vsi->rx_page_failed = rx_page;
 859         vsi->rx_buf_failed = rx_buf;
 860
 861         ns->rx_packets = rx_p;
 862         ns->rx_bytes = rx_b;
 863         ns->tx_packets = tx_p;
 864         ns->tx_bytes = tx_b;
 865
 866         /* update netdev stats from eth stats */
 867         i40e_update_eth_stats(vsi);
 868         ons->tx_errors = oes->tx_errors;
 869         ns->tx_errors = es->tx_errors;
 870         ons->multicast = oes->rx_multicast;
 871         ns->multicast = es->rx_multicast;
 872         ons->rx_dropped = oes->rx_discards;
 873         ns->rx_dropped = es->rx_discards;
 874         ons->tx_dropped = oes->tx_discards;
 875         ns->tx_dropped = es->tx_discards;
 876
 877         /* pull in a couple PF stats if this is the main vsi */
 878         if (vsi == pf->vsi[pf->lan_vsi]) {
 879                 ns->rx_crc_errors = pf->stats.crc_errors;
 880                 ns->rx_errors = pf->stats.crc_errors + pf->stats.illegal_bytes;
 881                 ns->rx_length_errors = pf->stats.rx_length_errors;
 882         }
 883 }
 884
 885 /**
 886  * i40e_update_pf_stats - Update the PF statistics counters.
 887  * @pf: the PF to be updated
 888  **/
 889 static void i40e_update_pf_stats(struct i40e_pf *pf)
 890 {
 891         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 892         struct i40e_hw_port_stats *nsd = &pf->stats;
 893         struct i40e_hw *hw = &pf->hw;
 894         u32 val;
 895         int i;
 896
 897         i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 898                            I40E_GLPRT_GORCL(hw->port),
 899                            pf->stat_offsets_loaded,
 900                            &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 901         i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 902                            I40E_GLPRT_GOTCL(hw->port),
 903                            pf->stat_offsets_loaded,
 904                            &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 905         i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 906                            pf->stat_offsets_loaded,
 907                            &osd->eth.rx_discards,
 908                            &nsd->eth.rx_discards);
 909         i40e_stat_update48(hw, I40E_GLPRT_UPRCH(hw->port),
 910                            I40E_GLPRT_UPRCL(hw->port),
 911                            pf->stat_offsets_loaded,
 912                            &osd->eth.rx_unicast,
 913                            &nsd->eth.rx_unicast);
 914         i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 915                            I40E_GLPRT_MPRCL(hw->port),
 916                            pf->stat_offsets_loaded,
 917                            &osd->eth.rx_multicast,
 918                            &nsd->eth.rx_multicast);
 919         i40e_stat_update48(hw, I40E_GLPRT_BPRCH(hw->port),
 920                            I40E_GLPRT_BPRCL(hw->port),
 921                            pf->stat_offsets_loaded,
 922                            &osd->eth.rx_broadcast,
 923                            &nsd->eth.rx_broadcast);
 924         i40e_stat_update48(hw, I40E_GLPRT_UPTCH(hw->port),
 925                            I40E_GLPRT_UPTCL(hw->port),
 926                            pf->stat_offsets_loaded,
 927                            &osd->eth.tx_unicast,
 928                            &nsd->eth.tx_unicast);
 929         i40e_stat_update48(hw, I40E_GLPRT_MPTCH(hw->port),
 930                            I40E_GLPRT_MPTCL(hw->port),
 931                            pf->stat_offsets_loaded,
 932                            &osd->eth.tx_multicast,
 933                            &nsd->eth.tx_multicast);
 934         i40e_stat_update48(hw, I40E_GLPRT_BPTCH(hw->port),
 935                            I40E_GLPRT_BPTCL(hw->port),
 936                            pf->stat_offsets_loaded,
 937                            &osd->eth.tx_broadcast,
 938                            &nsd->eth.tx_broadcast);
 939
 940         i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 941                            pf->stat_offsets_loaded,
 942                            &osd->tx_dropped_link_down,
 943                            &nsd->tx_dropped_link_down);
 944
 945         i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 946                            pf->stat_offsets_loaded,
 947                            &osd->crc_errors, &nsd->crc_errors);
 948
 949         i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 950                            pf->stat_offsets_loaded,
 951                            &osd->illegal_bytes, &nsd->illegal_bytes);
 952
 953         i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 954                            pf->stat_offsets_loaded,
 955                            &osd->mac_local_faults,
 956                            &nsd->mac_local_faults);
 957         i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 958                            pf->stat_offsets_loaded,
 959                            &osd->mac_remote_faults,
 960                            &nsd->mac_remote_faults);
 961
 962         i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 963                            pf->stat_offsets_loaded,
 964                            &osd->rx_length_errors,
 965                            &nsd->rx_length_errors);
 966
 967         i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 968                            pf->stat_offsets_loaded,
 969                            &osd->link_xon_rx, &nsd->link_xon_rx);
 970         i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 971                            pf->stat_offsets_loaded,
 972                            &osd->link_xon_tx, &nsd->link_xon_tx);
 973         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 974                            pf->stat_offsets_loaded,
 975                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 976         i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 977                            pf->stat_offsets_loaded,
 978                            &osd->link_xoff_tx, &nsd->link_xoff_tx);
 979
 980         for (i = 0; i < 8; i++) {
 981                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 982                                    pf->stat_offsets_loaded,
 983                                    &osd->priority_xoff_rx[i],
 984                                    &nsd->priority_xoff_rx[i]);
 985                 i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 986                                    pf->stat_offsets_loaded,
 987                                    &osd->priority_xon_rx[i],
 988                                    &nsd->priority_xon_rx[i]);
 989                 i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 990                                    pf->stat_offsets_loaded,
 991                                    &osd->priority_xon_tx[i],
 992                                    &nsd->priority_xon_tx[i]);
 993                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 994                                    pf->stat_offsets_loaded,
 995                                    &osd->priority_xoff_tx[i],
 996                                    &nsd->priority_xoff_tx[i]);
 997                 i40e_stat_update32(hw,
 998                                    I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 999                                    pf->stat_offsets_loaded,
1000                                    &osd->priority_xon_2_xoff[i],
1001                                    &nsd->priority_xon_2_xoff[i]);
1002         }
1003
1004         i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
1005                            I40E_GLPRT_PRC64L(hw->port),
1006                            pf->stat_offsets_loaded,
1007                            &osd->rx_size_64, &nsd->rx_size_64);
1008         i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
1009                            I40E_GLPRT_PRC127L(hw->port),
1010                            pf->stat_offsets_loaded,
1011                            &osd->rx_size_127, &nsd->rx_size_127);
1012         i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
1013                            I40E_GLPRT_PRC255L(hw->port),
1014                            pf->stat_offsets_loaded,
1015                            &osd->rx_size_255, &nsd->rx_size_255);
1016         i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
1017                            I40E_GLPRT_PRC511L(hw->port),
1018                            pf->stat_offsets_loaded,
1019                            &osd->rx_size_511, &nsd->rx_size_511);
1020         i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
1021                            I40E_GLPRT_PRC1023L(hw->port),
1022                            pf->stat_offsets_loaded,
1023                            &osd->rx_size_1023, &nsd->rx_size_1023);
1024         i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
1025                            I40E_GLPRT_PRC1522L(hw->port),
1026                            pf->stat_offsets_loaded,
1027                            &osd->rx_size_1522, &nsd->rx_size_1522);
1028         i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
1029                            I40E_GLPRT_PRC9522L(hw->port),
1030                            pf->stat_offsets_loaded,
1031                            &osd->rx_size_big, &nsd->rx_size_big);
1032
1033         i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
1034                            I40E_GLPRT_PTC64L(hw->port),
1035                            pf->stat_offsets_loaded,
1036                            &osd->tx_size_64, &nsd->tx_size_64);
1037         i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
1038                            I40E_GLPRT_PTC127L(hw->port),
1039                            pf->stat_offsets_loaded,
1040                            &osd->tx_size_127, &nsd->tx_size_127);
1041         i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
1042                            I40E_GLPRT_PTC255L(hw->port),
1043                            pf->stat_offsets_loaded,
1044                            &osd->tx_size_255, &nsd->tx_size_255);
1045         i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
1046                            I40E_GLPRT_PTC511L(hw->port),
1047                            pf->stat_offsets_loaded,
1048                            &osd->tx_size_511, &nsd->tx_size_511);
1049         i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
1050                            I40E_GLPRT_PTC1023L(hw->port),
1051                            pf->stat_offsets_loaded,
1052                            &osd->tx_size_1023, &nsd->tx_size_1023);
1053         i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
1054                            I40E_GLPRT_PTC1522L(hw->port),
1055                            pf->stat_offsets_loaded,
1056                            &osd->tx_size_1522, &nsd->tx_size_1522);
1057         i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
1058                            I40E_GLPRT_PTC9522L(hw->port),
1059                            pf->stat_offsets_loaded,
1060                            &osd->tx_size_big, &nsd->tx_size_big);
1061
1062         i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
1063                            pf->stat_offsets_loaded,
1064                            &osd->rx_undersize, &nsd->rx_undersize);
1065         i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
1066                            pf->stat_offsets_loaded,
1067                            &osd->rx_fragments, &nsd->rx_fragments);
1068         i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
1069                            pf->stat_offsets_loaded,
1070                            &osd->rx_oversize, &nsd->rx_oversize);
1071         i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
1072                            pf->stat_offsets_loaded,
1073                            &osd->rx_jabber, &nsd->rx_jabber);
1074
1075         /* FDIR stats */
1076         i40e_stat_update32(hw,
1077                            I40E_GLQF_PCNT(I40E_FD_ATR_STAT_IDX(pf->hw.pf_id)),
1078                            pf->stat_offsets_loaded,
1079                            &osd->fd_atr_match, &nsd->fd_atr_match);
1080         i40e_stat_update32(hw,
1081                            I40E_GLQF_PCNT(I40E_FD_SB_STAT_IDX(pf->hw.pf_id)),
1082                            pf->stat_offsets_loaded,
1083                            &osd->fd_sb_match, &nsd->fd_sb_match);
1084         i40e_stat_update32(hw,
1085                       I40E_GLQF_PCNT(I40E_FD_ATR_TUNNEL_STAT_IDX(pf->hw.pf_id)),
1086                       pf->stat_offsets_loaded,
1087                       &osd->fd_atr_tunnel_match, &nsd->fd_atr_tunnel_match);
1088
1089         val = rd32(hw, I40E_PRTPM_EEE_STAT);
1090         nsd->tx_lpi_status =
1091                        (val & I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_MASK) >>
1092                         I40E_PRTPM_EEE_STAT_TX_LPI_STATUS_SHIFT;
1093         nsd->rx_lpi_status =
1094                        (val & I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_MASK) >>
1095                         I40E_PRTPM_EEE_STAT_RX_LPI_STATUS_SHIFT;
1096         i40e_stat_update32(hw, I40E_PRTPM_TLPIC,
1097                            pf->stat_offsets_loaded,
1098                            &osd->tx_lpi_count, &nsd->tx_lpi_count);
1099         i40e_stat_update32(hw, I40E_PRTPM_RLPIC,
1100                            pf->stat_offsets_loaded,
1101                            &osd->rx_lpi_count, &nsd->rx_lpi_count);
1102
1103         if (pf->flags & I40E_FLAG_FD_SB_ENABLED &&
1104             !(pf->hw_disabled_flags & I40E_FLAG_FD_SB_ENABLED))
1105                 nsd->fd_sb_status = true;
1106         else
1107                 nsd->fd_sb_status = false;
1108
1109         if (pf->flags & I40E_FLAG_FD_ATR_ENABLED &&
1110             !(pf->hw_disabled_flags & I40E_FLAG_FD_ATR_ENABLED))
1111                 nsd->fd_atr_status = true;
1112         else
1113                 nsd->fd_atr_status = false;
1114
1115         pf->stat_offsets_loaded = true;
1116 }
1117
1118 /**
1119  * i40e_update_stats - Update the various statistics counters.
1120  * @vsi: the VSI to be updated
1121  *
1122  * Update the various stats for this VSI and its related entities.
1123  **/
1124 void i40e_update_stats(struct i40e_vsi *vsi)
1125 {
1126         struct i40e_pf *pf = vsi->back;
1127
1128         if (vsi == pf->vsi[pf->lan_vsi])
1129                 i40e_update_pf_stats(pf);
1130
1131         i40e_update_vsi_stats(vsi);
1132 #ifdef I40E_FCOE
1133         i40e_update_fcoe_stats(vsi);
1134 #endif
1135 }
1136
1137 /**
1138  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
1139  * @vsi: the VSI to be searched
1140  * @macaddr: the MAC address
1141  * @vlan: the vlan
1142  *
1143  * Returns ptr to the filter object or NULL
1144  **/
1145 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
1146                                                 const u8 *macaddr, s16 vlan)
1147 {
1148         struct i40e_mac_filter *f;
1149         u64 key;
1150
1151         if (!vsi || !macaddr)
1152                 return NULL;
1153
1154         key = i40e_addr_to_hkey(macaddr);
1155         hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
1156                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1157                     (vlan == f->vlan))
1158                         return f;
1159         }
1160         return NULL;
1161 }
1162
1163 /**
1164  * i40e_find_mac - Find a mac addr in the macvlan filters list
1165  * @vsi: the VSI to be searched
1166  * @macaddr: the MAC address we are searching for
1167  *
1168  * Returns the first filter with the provided MAC address or NULL if
1169  * MAC address was not found
1170  **/
1171 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, const u8 *macaddr)
1172 {
1173         struct i40e_mac_filter *f;
1174         u64 key;
1175
1176         if (!vsi || !macaddr)
1177                 return NULL;
1178
1179         key = i40e_addr_to_hkey(macaddr);
1180         hash_for_each_possible(vsi->mac_filter_hash, f, hlist, key) {
1181                 if ((ether_addr_equal(macaddr, f->macaddr)))
1182                         return f;
1183         }
1184         return NULL;
1185 }
1186
1187 /**
1188  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1189  * @vsi: the VSI to be searched
1190  *
1191  * Returns true if VSI is in vlan mode or false otherwise
1192  **/
1193 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1194 {
1195         /* If we have a PVID, always operate in VLAN mode */
1196         if (vsi->info.pvid)
1197                 return true;
1198
1199         /* We need to operate in VLAN mode whenever we have any filters with
1200          * a VLAN other than I40E_VLAN_ALL. We could check the table each
1201          * time, incurring search cost repeatedly. However, we can notice two
1202          * things:
1203          *
1204          * 1) the only place where we can gain a VLAN filter is in
1205          *    i40e_add_filter.
1206          *
1207          * 2) the only place where filters are actually removed is in
1208          *    i40e_sync_filters_subtask.
1209          *
1210          * Thus, we can simply use a boolean value, has_vlan_filters which we
1211          * will set to true when we add a VLAN filter in i40e_add_filter. Then
1212          * we have to perform the full search after deleting filters in
1213          * i40e_sync_filters_subtask, but we already have to search
1214          * filters here and can perform the check at the same time. This
1215          * results in avoiding embedding a loop for VLAN mode inside another
1216          * loop over all the filters, and should maintain correctness as noted
1217          * above.
1218          */
1219         return vsi->has_vlan_filter;
1220 }
1221
1222 /**
1223  * i40e_correct_mac_vlan_filters - Correct non-VLAN filters if necessary
1224  * @vsi: the VSI to configure
1225  * @tmp_add_list: list of filters ready to be added
1226  * @tmp_del_list: list of filters ready to be deleted
1227  * @vlan_filters: the number of active VLAN filters
1228  *
1229  * Update VLAN=0 and VLAN=-1 (I40E_VLAN_ANY) filters properly so that they
1230  * behave as expected. If we have any active VLAN filters remaining or about
1231  * to be added then we need to update non-VLAN filters to be marked as VLAN=0
1232  * so that they only match against untagged traffic. If we no longer have any
1233  * active VLAN filters, we need to make all non-VLAN filters marked as VLAN=-1
1234  * so that they match against both tagged and untagged traffic. In this way,
1235  * we ensure that we correctly receive the desired traffic. This ensures that
1236  * when we have an active VLAN we will receive only untagged traffic and
1237  * traffic matching active VLANs. If we have no active VLANs then we will
1238  * operate in non-VLAN mode and receive all traffic, tagged or untagged.
1239  *
1240  * Finally, in a similar fashion, this function also corrects filters when
1241  * there is an active PVID assigned to this VSI.
1242  *
1243  * In case of memory allocation failure return -ENOMEM. Otherwise, return 0.
1244  *
1245  * This function is only expected to be called from within
1246  * i40e_sync_vsi_filters.
1247  *
1248  * NOTE: This function expects to be called while under the
1249  * mac_filter_hash_lock
1250  */
1251 static int i40e_correct_mac_vlan_filters(struct i40e_vsi *vsi,
1252                                          struct hlist_head *tmp_add_list,
1253                                          struct hlist_head *tmp_del_list,
1254                                          int vlan_filters)
1255 {
1256         s16 pvid = le16_to_cpu(vsi->info.pvid);
1257         struct i40e_mac_filter *f, *add_head;
1258         struct i40e_new_mac_filter *new;
1259         struct hlist_node *h;
1260         int bkt, new_vlan;
1261
1262         /* To determine if a particular filter needs to be replaced we
1263          * have the three following conditions:
1264          *
1265          * a) if we have a PVID assigned, then all filters which are
1266          *    not marked as VLAN=PVID must be replaced with filters that
1267          *    are.
1268          * b) otherwise, if we have any active VLANS, all filters
1269          *    which are marked as VLAN=-1 must be replaced with
1270          *    filters marked as VLAN=0
1271          * c) finally, if we do not have any active VLANS, all filters
1272          *    which are marked as VLAN=0 must be replaced with filters
1273          *    marked as VLAN=-1
1274          */
1275
1276         /* Update the filters about to be added in place */
1277         hlist_for_each_entry(new, tmp_add_list, hlist) {
1278                 if (pvid && new->f->vlan != pvid)
1279                         new->f->vlan = pvid;
1280                 else if (vlan_filters && new->f->vlan == I40E_VLAN_ANY)
1281                         new->f->vlan = 0;
1282                 else if (!vlan_filters && new->f->vlan == 0)
1283                         new->f->vlan = I40E_VLAN_ANY;
1284         }
1285
1286         /* Update the remaining active filters */
1287         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
1288                 /* Combine the checks for whether a filter needs to be changed
1289                  * and then determine the new VLAN inside the if block, in
1290                  * order to avoid duplicating code for adding the new filter
1291                  * then deleting the old filter.
1292                  */
1293                 if ((pvid && f->vlan != pvid) ||
1294                     (vlan_filters && f->vlan == I40E_VLAN_ANY) ||
1295                     (!vlan_filters && f->vlan == 0)) {
1296                         /* Determine the new vlan we will be adding */
1297                         if (pvid)
1298                                 new_vlan = pvid;
1299                         else if (vlan_filters)
1300                                 new_vlan = 0;
1301                         else
1302                                 new_vlan = I40E_VLAN_ANY;
1303
1304                         /* Create the new filter */
1305                         add_head = i40e_add_filter(vsi, f->macaddr, new_vlan);
1306                         if (!add_head)
1307                                 return -ENOMEM;
1308
1309                         /* Create a temporary i40e_new_mac_filter */
1310                         new = kzalloc(sizeof(*new), GFP_ATOMIC);
1311                         if (!new)
1312                                 return -ENOMEM;
1313
1314                         new->f = add_head;
1315                         new->state = add_head->state;
1316
1317                         /* Add the new filter to the tmp list */
1318                         hlist_add_head(&new->hlist, tmp_add_list);
1319
1320                         /* Put the original filter into the delete list */
1321                         f->state = I40E_FILTER_REMOVE;
1322                         hash_del(&f->hlist);
1323                         hlist_add_head(&f->hlist, tmp_del_list);
1324                 }
1325         }
1326
1327         vsi->has_vlan_filter = !!vlan_filters;
1328
1329         return 0;
1330 }
1331
1332 /**
1333  * i40e_rm_default_mac_filter - Remove the default MAC filter set by NVM
1334  * @vsi: the PF Main VSI - inappropriate for any other VSI
1335  * @macaddr: the MAC address
1336  *
1337  * Remove whatever filter the firmware set up so the driver can manage
1338  * its own filtering intelligently.
1339  **/
1340 static void i40e_rm_default_mac_filter(struct i40e_vsi *vsi, u8 *macaddr)
1341 {
1342         struct i40e_aqc_remove_macvlan_element_data element;
1343         struct i40e_pf *pf = vsi->back;
1344
1345         /* Only appropriate for the PF main VSI */
1346         if (vsi->type != I40E_VSI_MAIN)
1347                 return;
1348
1349         memset(&element, 0, sizeof(element));
1350         ether_addr_copy(element.mac_addr, macaddr);
1351         element.vlan_tag = 0;
1352         /* Ignore error returns, some firmware does it this way... */
1353         element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1354         i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
1355
1356         memset(&element, 0, sizeof(element));
1357         ether_addr_copy(element.mac_addr, macaddr);
1358         element.vlan_tag = 0;
1359         /* ...and some firmware does it this way. */
1360         element.flags = I40E_AQC_MACVLAN_DEL_PERFECT_MATCH |
1361                         I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
1362         i40e_aq_remove_macvlan(&pf->hw, vsi->seid, &element, 1, NULL);
1363 }
1364
1365 /**
1366  * i40e_add_filter - Add a mac/vlan filter to the VSI
1367  * @vsi: the VSI to be searched
1368  * @macaddr: the MAC address
1369  * @vlan: the vlan
1370  *
1371  * Returns ptr to the filter object or NULL when no memory available.
1372  *
1373  * NOTE: This function is expected to be called with mac_filter_hash_lock
1374  * being held.
1375  **/
1376 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1377                                         const u8 *macaddr, s16 vlan)
1378 {
1379         struct i40e_mac_filter *f;
1380         u64 key;
1381
1382         if (!vsi || !macaddr)
1383                 return NULL;
1384
1385         f = i40e_find_filter(vsi, macaddr, vlan);
1386         if (!f) {
1387                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1388                 if (!f)
1389                         return NULL;
1390
1391                 /* Update the boolean indicating if we need to function in
1392                  * VLAN mode.
1393                  */
1394                 if (vlan >= 0)
1395                         vsi->has_vlan_filter = true;
1396
1397                 ether_addr_copy(f->macaddr, macaddr);
1398                 f->vlan = vlan;
1399                 /* If we're in overflow promisc mode, set the state directly
1400                  * to failed, so we don't bother to try sending the filter
1401                  * to the hardware.
1402                  */
1403                 if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state))
1404                         f->state = I40E_FILTER_FAILED;
1405                 else
1406                         f->state = I40E_FILTER_NEW;
1407                 INIT_HLIST_NODE(&f->hlist);
1408
1409                 key = i40e_addr_to_hkey(macaddr);
1410                 hash_add(vsi->mac_filter_hash, &f->hlist, key);
1411
1412                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1413                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1414         }
1415
1416         /* If we're asked to add a filter that has been marked for removal, it
1417          * is safe to simply restore it to active state. __i40e_del_filter
1418          * will have simply deleted any filters which were previously marked
1419          * NEW or FAILED, so if it is currently marked REMOVE it must have
1420          * previously been ACTIVE. Since we haven't yet run the sync filters
1421          * task, just restore this filter to the ACTIVE state so that the
1422          * sync task leaves it in place
1423          */
1424         if (f->state == I40E_FILTER_REMOVE)
1425                 f->state = I40E_FILTER_ACTIVE;
1426
1427         return f;
1428 }
1429
1430 /**
1431  * __i40e_del_filter - Remove a specific filter from the VSI
1432  * @vsi: VSI to remove from
1433  * @f: the filter to remove from the list
1434  *
1435  * This function should be called instead of i40e_del_filter only if you know
1436  * the exact filter you will remove already, such as via i40e_find_filter or
1437  * i40e_find_mac.
1438  *
1439  * NOTE: This function is expected to be called with mac_filter_hash_lock
1440  * being held.
1441  * ANOTHER NOTE: This function MUST be called from within the context of
1442  * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
1443  * instead of list_for_each_entry().
1444  **/
1445 void __i40e_del_filter(struct i40e_vsi *vsi, struct i40e_mac_filter *f)
1446 {
1447         if (!f)
1448                 return;
1449
1450         /* If the filter was never added to firmware then we can just delete it
1451          * directly and we don't want to set the status to remove or else an
1452          * admin queue command will unnecessarily fire.
1453          */
1454         if ((f->state == I40E_FILTER_FAILED) ||
1455             (f->state == I40E_FILTER_NEW)) {
1456                 hash_del(&f->hlist);
1457                 kfree(f);
1458         } else {
1459                 f->state = I40E_FILTER_REMOVE;
1460         }
1461
1462         vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1463         vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1464 }
1465
1466 /**
1467  * i40e_del_filter - Remove a MAC/VLAN filter from the VSI
1468  * @vsi: the VSI to be searched
1469  * @macaddr: the MAC address
1470  * @vlan: the VLAN
1471  *
1472  * NOTE: This function is expected to be called with mac_filter_hash_lock
1473  * being held.
1474  * ANOTHER NOTE: This function MUST be called from within the context of
1475  * the "safe" variants of any list iterators, e.g. list_for_each_entry_safe()
1476  * instead of list_for_each_entry().
1477  **/
1478 void i40e_del_filter(struct i40e_vsi *vsi, const u8 *macaddr, s16 vlan)
1479 {
1480         struct i40e_mac_filter *f;
1481
1482         if (!vsi || !macaddr)
1483                 return;
1484
1485         f = i40e_find_filter(vsi, macaddr, vlan);
1486         __i40e_del_filter(vsi, f);
1487 }
1488
1489 /**
1490  * i40e_add_mac_filter - Add a MAC filter for all active VLANs
1491  * @vsi: the VSI to be searched
1492  * @macaddr: the mac address to be filtered
1493  *
1494  * If we're not in VLAN mode, just add the filter to I40E_VLAN_ANY. Otherwise,
1495  * go through all the macvlan filters and add a macvlan filter for each
1496  * unique vlan that already exists. If a PVID has been assigned, instead only
1497  * add the macaddr to that VLAN.
1498  *
1499  * Returns last filter added on success, else NULL
1500  **/
1501 struct i40e_mac_filter *i40e_add_mac_filter(struct i40e_vsi *vsi,
1502                                             const u8 *macaddr)
1503 {
1504         struct i40e_mac_filter *f, *add = NULL;
1505         struct hlist_node *h;
1506         int bkt;
1507
1508         if (vsi->info.pvid)
1509                 return i40e_add_filter(vsi, macaddr,
1510                                        le16_to_cpu(vsi->info.pvid));
1511
1512         if (!i40e_is_vsi_in_vlan(vsi))
1513                 return i40e_add_filter(vsi, macaddr, I40E_VLAN_ANY);
1514
1515         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
1516                 if (f->state == I40E_FILTER_REMOVE)
1517                         continue;
1518                 add = i40e_add_filter(vsi, macaddr, f->vlan);
1519                 if (!add)
1520                         return NULL;
1521         }
1522
1523         return add;
1524 }
1525
1526 /**
1527  * i40e_del_mac_filter - Remove a MAC filter from all VLANs
1528  * @vsi: the VSI to be searched
1529  * @macaddr: the mac address to be removed
1530  *
1531  * Removes a given MAC address from a VSI regardless of what VLAN it has been
1532  * associated with.
1533  *
1534  * Returns 0 for success, or error
1535  **/
1536 int i40e_del_mac_filter(struct i40e_vsi *vsi, const u8 *macaddr)
1537 {
1538         struct i40e_mac_filter *f;
1539         struct hlist_node *h;
1540         bool found = false;
1541         int bkt;
1542
1543         WARN(!spin_is_locked(&vsi->mac_filter_hash_lock),
1544              "Missing mac_filter_hash_lock\n");
1545         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
1546                 if (ether_addr_equal(macaddr, f->macaddr)) {
1547                         __i40e_del_filter(vsi, f);
1548                         found = true;
1549                 }
1550         }
1551
1552         if (found)
1553                 return 0;
1554         else
1555                 return -ENOENT;
1556 }
1557
1558 /**
1559  * i40e_set_mac - NDO callback to set mac address
1560  * @netdev: network interface device structure
1561  * @p: pointer to an address structure
1562  *
1563  * Returns 0 on success, negative on failure
1564  **/
1565 #ifdef I40E_FCOE
1566 int i40e_set_mac(struct net_device *netdev, void *p)
1567 #else
1568 static int i40e_set_mac(struct net_device *netdev, void *p)
1569 #endif
1570 {
1571         struct i40e_netdev_priv *np = netdev_priv(netdev);
1572         struct i40e_vsi *vsi = np->vsi;
1573         struct i40e_pf *pf = vsi->back;
1574         struct i40e_hw *hw = &pf->hw;
1575         struct sockaddr *addr = p;
1576
1577         if (!is_valid_ether_addr(addr->sa_data))
1578                 return -EADDRNOTAVAIL;
1579
1580         if (ether_addr_equal(netdev->dev_addr, addr->sa_data)) {
1581                 netdev_info(netdev, "already using mac address %pM\n",
1582                             addr->sa_data);
1583                 return 0;
1584         }
1585
1586         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1587             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1588                 return -EADDRNOTAVAIL;
1589
1590         if (ether_addr_equal(hw->mac.addr, addr->sa_data))
1591                 netdev_info(netdev, "returning to hw mac address %pM\n",
1592                             hw->mac.addr);
1593         else
1594                 netdev_info(netdev, "set new mac address %pM\n", addr->sa_data);
1595
1596         spin_lock_bh(&vsi->mac_filter_hash_lock);
1597         i40e_del_mac_filter(vsi, netdev->dev_addr);
1598         i40e_add_mac_filter(vsi, addr->sa_data);
1599         spin_unlock_bh(&vsi->mac_filter_hash_lock);
1600         ether_addr_copy(netdev->dev_addr, addr->sa_data);
1601         if (vsi->type == I40E_VSI_MAIN) {
1602                 i40e_status ret;
1603
1604                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1605                                                 I40E_AQC_WRITE_TYPE_LAA_WOL,
1606                                                 addr->sa_data, NULL);
1607                 if (ret)
1608                         netdev_info(netdev, "Ignoring error from firmware on LAA update, status %s, AQ ret %s\n",
1609                                     i40e_stat_str(hw, ret),
1610                                     i40e_aq_str(hw, hw->aq.asq_last_status));
1611         }
1612
1613         /* schedule our worker thread which will take care of
1614          * applying the new filter changes
1615          */
1616         i40e_service_event_schedule(vsi->back);
1617         return 0;
1618 }
1619
1620 /**
1621  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1622  * @vsi: the VSI being setup
1623  * @ctxt: VSI context structure
1624  * @enabled_tc: Enabled TCs bitmap
1625  * @is_add: True if called before Add VSI
1626  *
1627  * Setup VSI queue mapping for enabled traffic classes.
1628  **/
1629 #ifdef I40E_FCOE
1630 void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1631                               struct i40e_vsi_context *ctxt,
1632                               u8 enabled_tc,
1633                               bool is_add)
1634 #else
1635 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1636                                      struct i40e_vsi_context *ctxt,
1637                                      u8 enabled_tc,
1638                                      bool is_add)
1639 #endif
1640 {
1641         struct i40e_pf *pf = vsi->back;
1642         u16 sections = 0;
1643         u8 netdev_tc = 0;
1644         u16 numtc = 0;
1645         u16 qcount;
1646         u8 offset;
1647         u16 qmap;
1648         int i;
1649         u16 num_tc_qps = 0;
1650
1651         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1652         offset = 0;
1653
1654         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1655                 /* Find numtc from enabled TC bitmap */
1656                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1657                         if (enabled_tc & BIT(i)) /* TC is enabled */
1658                                 numtc++;
1659                 }
1660                 if (!numtc) {
1661                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1662                         numtc = 1;
1663                 }
1664         } else {
1665                 /* At least TC0 is enabled in case of non-DCB case */
1666                 numtc = 1;
1667         }
1668
1669         vsi->tc_config.numtc = numtc;
1670         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1671         /* Number of queues per enabled TC */
1672         qcount = vsi->alloc_queue_pairs;
1673
1674         num_tc_qps = qcount / numtc;
1675         num_tc_qps = min_t(int, num_tc_qps, i40e_pf_get_max_q_per_tc(pf));
1676
1677         /* Setup queue offset/count for all TCs for given VSI */
1678         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1679                 /* See if the given TC is enabled for the given VSI */
1680                 if (vsi->tc_config.enabled_tc & BIT(i)) {
1681                         /* TC is enabled */
1682                         int pow, num_qps;
1683
1684                         switch (vsi->type) {
1685                         case I40E_VSI_MAIN:
1686                                 qcount = min_t(int, pf->alloc_rss_size,
1687                                                num_tc_qps);
1688                                 break;
1689 #ifdef I40E_FCOE
1690                         case I40E_VSI_FCOE:
1691                                 qcount = num_tc_qps;
1692                                 break;
1693 #endif
1694                         case I40E_VSI_FDIR:
1695                         case I40E_VSI_SRIOV:
1696                         case I40E_VSI_VMDQ2:
1697                         default:
1698                                 qcount = num_tc_qps;
1699                                 WARN_ON(i != 0);
1700                                 break;
1701                         }
1702                         vsi->tc_config.tc_info[i].qoffset = offset;
1703                         vsi->tc_config.tc_info[i].qcount = qcount;
1704
1705                         /* find the next higher power-of-2 of num queue pairs */
1706                         num_qps = qcount;
1707                         pow = 0;
1708                         while (num_qps && (BIT_ULL(pow) < qcount)) {
1709                                 pow++;
1710                                 num_qps >>= 1;
1711                         }
1712
1713                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1714                         qmap =
1715                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1716                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1717
1718                         offset += qcount;
1719                 } else {
1720                         /* TC is not enabled so set the offset to
1721                          * default queue and allocate one queue
1722                          * for the given TC.
1723                          */
1724                         vsi->tc_config.tc_info[i].qoffset = 0;
1725                         vsi->tc_config.tc_info[i].qcount = 1;
1726                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1727
1728                         qmap = 0;
1729                 }
1730                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1731         }
1732
1733         /* Set actual Tx/Rx queue pairs */
1734         vsi->num_queue_pairs = offset;
1735         if ((vsi->type == I40E_VSI_MAIN) && (numtc == 1)) {
1736                 if (vsi->req_queue_pairs > 0)
1737                         vsi->num_queue_pairs = vsi->req_queue_pairs;
1738                 else if (pf->flags & I40E_FLAG_MSIX_ENABLED)
1739                         vsi->num_queue_pairs = pf->num_lan_msix;
1740         }
1741
1742         /* Scheduler section valid can only be set for ADD VSI */
1743         if (is_add) {
1744                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1745
1746                 ctxt->info.up_enable_bits = enabled_tc;
1747         }
1748         if (vsi->type == I40E_VSI_SRIOV) {
1749                 ctxt->info.mapping_flags |=
1750                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1751                 for (i = 0; i < vsi->num_queue_pairs; i++)
1752                         ctxt->info.queue_mapping[i] =
1753                                                cpu_to_le16(vsi->base_queue + i);
1754         } else {
1755                 ctxt->info.mapping_flags |=
1756                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1757                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1758         }
1759         ctxt->info.valid_sections |= cpu_to_le16(sections);
1760 }
1761
1762 /**
1763  * i40e_addr_sync - Callback for dev_(mc|uc)_sync to add address
1764  * @netdev: the netdevice
1765  * @addr: address to add
1766  *
1767  * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
1768  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
1769  */
1770 static int i40e_addr_sync(struct net_device *netdev, const u8 *addr)
1771 {
1772         struct i40e_netdev_priv *np = netdev_priv(netdev);
1773         struct i40e_vsi *vsi = np->vsi;
1774
1775         if (i40e_add_mac_filter(vsi, addr))
1776                 return 0;
1777         else
1778                 return -ENOMEM;
1779 }
1780
1781 /**
1782  * i40e_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
1783  * @netdev: the netdevice
1784  * @addr: address to add
1785  *
1786  * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
1787  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
1788  */
1789 static int i40e_addr_unsync(struct net_device *netdev, const u8 *addr)
1790 {
1791         struct i40e_netdev_priv *np = netdev_priv(netdev);
1792         struct i40e_vsi *vsi = np->vsi;
1793
1794         i40e_del_mac_filter(vsi, addr);
1795
1796         return 0;
1797 }
1798
1799 /**
1800  * i40e_set_rx_mode - NDO callback to set the netdev filters
1801  * @netdev: network interface device structure
1802  **/
1803 #ifdef I40E_FCOE
1804 void i40e_set_rx_mode(struct net_device *netdev)
1805 #else
1806 static void i40e_set_rx_mode(struct net_device *netdev)
1807 #endif
1808 {
1809         struct i40e_netdev_priv *np = netdev_priv(netdev);
1810         struct i40e_vsi *vsi = np->vsi;
1811
1812         spin_lock_bh(&vsi->mac_filter_hash_lock);
1813
1814         __dev_uc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);
1815         __dev_mc_sync(netdev, i40e_addr_sync, i40e_addr_unsync);
1816
1817         spin_unlock_bh(&vsi->mac_filter_hash_lock);
1818
1819         /* check for other flag changes */
1820         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1821                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1822                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1823         }
1824
1825         /* schedule our worker thread which will take care of
1826          * applying the new filter changes
1827          */
1828         i40e_service_event_schedule(vsi->back);
1829 }
1830
1831 /**
1832  * i40e_undo_del_filter_entries - Undo the changes made to MAC filter entries
1833  * @vsi: Pointer to VSI struct
1834  * @from: Pointer to list which contains MAC filter entries - changes to
1835  *        those entries needs to be undone.
1836  *
1837  * MAC filter entries from this list were slated for deletion.
1838  **/
1839 static void i40e_undo_del_filter_entries(struct i40e_vsi *vsi,
1840                                          struct hlist_head *from)
1841 {
1842         struct i40e_mac_filter *f;
1843         struct hlist_node *h;
1844
1845         hlist_for_each_entry_safe(f, h, from, hlist) {
1846                 u64 key = i40e_addr_to_hkey(f->macaddr);
1847
1848                 /* Move the element back into MAC filter list*/
1849                 hlist_del(&f->hlist);
1850                 hash_add(vsi->mac_filter_hash, &f->hlist, key);
1851         }
1852 }
1853
1854 /**
1855  * i40e_undo_add_filter_entries - Undo the changes made to MAC filter entries
1856  * @vsi: Pointer to vsi struct
1857  * @from: Pointer to list which contains MAC filter entries - changes to
1858  *        those entries needs to be undone.
1859  *
1860  * MAC filter entries from this list were slated for addition.
1861  **/
1862 static void i40e_undo_add_filter_entries(struct i40e_vsi *vsi,
1863                                          struct hlist_head *from)
1864 {
1865         struct i40e_new_mac_filter *new;
1866         struct hlist_node *h;
1867
1868         hlist_for_each_entry_safe(new, h, from, hlist) {
1869                 /* We can simply free the wrapper structure */
1870                 hlist_del(&new->hlist);
1871                 kfree(new);
1872         }
1873 }
1874
1875 /**
1876  * i40e_next_entry - Get the next non-broadcast filter from a list
1877  * @next: pointer to filter in list
1878  *
1879  * Returns the next non-broadcast filter in the list. Required so that we
1880  * ignore broadcast filters within the list, since these are not handled via
1881  * the normal firmware update path.
1882  */
1883 static
1884 struct i40e_new_mac_filter *i40e_next_filter(struct i40e_new_mac_filter *next)
1885 {
1886         while (next) {
1887                 next = hlist_entry(next->hlist.next,
1888                                    typeof(struct i40e_new_mac_filter),
1889                                    hlist);
1890
1891                 /* keep going if we found a broadcast filter */
1892                 if (next && is_broadcast_ether_addr(next->f->macaddr))
1893                         continue;
1894
1895                 break;
1896         }
1897
1898         return next;
1899 }
1900
1901 /**
1902  * i40e_update_filter_state - Update filter state based on return data
1903  * from firmware
1904  * @count: Number of filters added
1905  * @add_list: return data from fw
1906  * @head: pointer to first filter in current batch
1907  *
1908  * MAC filter entries from list were slated to be added to device. Returns
1909  * number of successful filters. Note that 0 does NOT mean success!
1910  **/
1911 static int
1912 i40e_update_filter_state(int count,
1913                          struct i40e_aqc_add_macvlan_element_data *add_list,
1914                          struct i40e_new_mac_filter *add_head)
1915 {
1916         int retval = 0;
1917         int i;
1918
1919         for (i = 0; i < count; i++) {
1920                 /* Always check status of each filter. We don't need to check
1921                  * the firmware return status because we pre-set the filter
1922                  * status to I40E_AQC_MM_ERR_NO_RES when sending the filter
1923                  * request to the adminq. Thus, if it no longer matches then
1924                  * we know the filter is active.
1925                  */
1926                 if (add_list[i].match_method == I40E_AQC_MM_ERR_NO_RES) {
1927                         add_head->state = I40E_FILTER_FAILED;
1928                 } else {
1929                         add_head->state = I40E_FILTER_ACTIVE;
1930                         retval++;
1931                 }
1932
1933                 add_head = i40e_next_filter(add_head);
1934                 if (!add_head)
1935                         break;
1936         }
1937
1938         return retval;
1939 }
1940
1941 /**
1942  * i40e_aqc_del_filters - Request firmware to delete a set of filters
1943  * @vsi: ptr to the VSI
1944  * @vsi_name: name to display in messages
1945  * @list: the list of filters to send to firmware
1946  * @num_del: the number of filters to delete
1947  * @retval: Set to -EIO on failure to delete
1948  *
1949  * Send a request to firmware via AdminQ to delete a set of filters. Uses
1950  * *retval instead of a return value so that success does not force ret_val to
1951  * be set to 0. This ensures that a sequence of calls to this function
1952  * preserve the previous value of *retval on successful delete.
1953  */
1954 static
1955 void i40e_aqc_del_filters(struct i40e_vsi *vsi, const char *vsi_name,
1956                           struct i40e_aqc_remove_macvlan_element_data *list,
1957                           int num_del, int *retval)
1958 {
1959         struct i40e_hw *hw = &vsi->back->hw;
1960         i40e_status aq_ret;
1961         int aq_err;
1962
1963         aq_ret = i40e_aq_remove_macvlan(hw, vsi->seid, list, num_del, NULL);
1964         aq_err = hw->aq.asq_last_status;
1965
1966         /* Explicitly ignore and do not report when firmware returns ENOENT */
1967         if (aq_ret && !(aq_err == I40E_AQ_RC_ENOENT)) {
1968                 *retval = -EIO;
1969                 dev_info(&vsi->back->pdev->dev,
1970                          "ignoring delete macvlan error on %s, err %s, aq_err %s\n",
1971                          vsi_name, i40e_stat_str(hw, aq_ret),
1972                          i40e_aq_str(hw, aq_err));
1973         }
1974 }
1975
1976 /**
1977  * i40e_aqc_add_filters - Request firmware to add a set of filters
1978  * @vsi: ptr to the VSI
1979  * @vsi_name: name to display in messages
1980  * @list: the list of filters to send to firmware
1981  * @add_head: Position in the add hlist
1982  * @num_add: the number of filters to add
1983  * @promisc_change: set to true on exit if promiscuous mode was forced on
1984  *
1985  * Send a request to firmware via AdminQ to add a chunk of filters. Will set
1986  * promisc_changed to true if the firmware has run out of space for more
1987  * filters.
1988  */
1989 static
1990 void i40e_aqc_add_filters(struct i40e_vsi *vsi, const char *vsi_name,
1991                           struct i40e_aqc_add_macvlan_element_data *list,
1992                           struct i40e_new_mac_filter *add_head,
1993                           int num_add, bool *promisc_changed)
1994 {
1995         struct i40e_hw *hw = &vsi->back->hw;
1996         int aq_err, fcnt;
1997
1998         i40e_aq_add_macvlan(hw, vsi->seid, list, num_add, NULL);
1999         aq_err = hw->aq.asq_last_status;
2000         fcnt = i40e_update_filter_state(num_add, list, add_head);
2001
2002         if (fcnt != num_add) {
2003                 *promisc_changed = true;
2004                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
2005                 dev_warn(&vsi->back->pdev->dev,
2006                          "Error %s adding RX filters on %s, promiscuous mode forced on\n",
2007                          i40e_aq_str(hw, aq_err),
2008                          vsi_name);
2009         }
2010 }
2011
2012 /**
2013  * i40e_aqc_broadcast_filter - Set promiscuous broadcast flags
2014  * @vsi: pointer to the VSI
2015  * @f: filter data
2016  *
2017  * This function sets or clears the promiscuous broadcast flags for VLAN
2018  * filters in order to properly receive broadcast frames. Assumes that only
2019  * broadcast filters are passed.
2020  *
2021  * Returns status indicating success or failure;
2022  **/
2023 static i40e_status
2024 i40e_aqc_broadcast_filter(struct i40e_vsi *vsi, const char *vsi_name,
2025                           struct i40e_mac_filter *f)
2026 {
2027         bool enable = f->state == I40E_FILTER_NEW;
2028         struct i40e_hw *hw = &vsi->back->hw;
2029         i40e_status aq_ret;
2030
2031         if (f->vlan == I40E_VLAN_ANY) {
2032                 aq_ret = i40e_aq_set_vsi_broadcast(hw,
2033                                                    vsi->seid,
2034                                                    enable,
2035                                                    NULL);
2036         } else {
2037                 aq_ret = i40e_aq_set_vsi_bc_promisc_on_vlan(hw,
2038                                                             vsi->seid,
2039                                                             enable,
2040                                                             f->vlan,
2041                                                             NULL);
2042         }
2043
2044         if (aq_ret)
2045                 dev_warn(&vsi->back->pdev->dev,
2046                          "Error %s setting broadcast promiscuous mode on %s\n",
2047                          i40e_aq_str(hw, hw->aq.asq_last_status),
2048                          vsi_name);
2049
2050         return aq_ret;
2051 }
2052
2053 /**
2054  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
2055  * @vsi: ptr to the VSI
2056  *
2057  * Push any outstanding VSI filter changes through the AdminQ.
2058  *
2059  * Returns 0 or error value
2060  **/
2061 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
2062 {
2063         struct hlist_head tmp_add_list, tmp_del_list;
2064         struct i40e_mac_filter *f;
2065         struct i40e_new_mac_filter *new, *add_head = NULL;
2066         struct i40e_hw *hw = &vsi->back->hw;
2067         unsigned int failed_filters = 0;
2068         unsigned int vlan_filters = 0;
2069         bool promisc_changed = false;
2070         char vsi_name[16] = "PF";
2071         int filter_list_len = 0;
2072         i40e_status aq_ret = 0;
2073         u32 changed_flags = 0;
2074         struct hlist_node *h;
2075         struct i40e_pf *pf;
2076         int num_add = 0;
2077         int num_del = 0;
2078         int retval = 0;
2079         u16 cmd_flags;
2080         int list_size;
2081         int bkt;
2082
2083         /* empty array typed pointers, kcalloc later */
2084         struct i40e_aqc_add_macvlan_element_data *add_list;
2085         struct i40e_aqc_remove_macvlan_element_data *del_list;
2086
2087         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
2088                 usleep_range(1000, 2000);
2089         pf = vsi->back;
2090
2091         if (vsi->netdev) {
2092                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
2093                 vsi->current_netdev_flags = vsi->netdev->flags;
2094         }
2095
2096         INIT_HLIST_HEAD(&tmp_add_list);
2097         INIT_HLIST_HEAD(&tmp_del_list);
2098
2099         if (vsi->type == I40E_VSI_SRIOV)
2100                 snprintf(vsi_name, sizeof(vsi_name) - 1, "VF %d", vsi->vf_id);
2101         else if (vsi->type != I40E_VSI_MAIN)
2102                 snprintf(vsi_name, sizeof(vsi_name) - 1, "vsi %d", vsi->seid);
2103
2104         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
2105                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
2106
2107                 spin_lock_bh(&vsi->mac_filter_hash_lock);
2108                 /* Create a list of filters to delete. */
2109                 hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
2110                         if (f->state == I40E_FILTER_REMOVE) {
2111                                 /* Move the element into temporary del_list */
2112                                 hash_del(&f->hlist);
2113                                 hlist_add_head(&f->hlist, &tmp_del_list);
2114
2115                                 /* Avoid counting removed filters */
2116                                 continue;
2117                         }
2118                         if (f->state == I40E_FILTER_NEW) {
2119                                 /* Create a temporary i40e_new_mac_filter */
2120                                 new = kzalloc(sizeof(*new), GFP_ATOMIC);
2121                                 if (!new)
2122                                         goto err_no_memory_locked;
2123
2124                                 /* Store pointer to the real filter */
2125                                 new->f = f;
2126                                 new->state = f->state;
2127
2128                                 /* Add it to the hash list */
2129                                 hlist_add_head(&new->hlist, &tmp_add_list);
2130                         }
2131
2132                         /* Count the number of active (current and new) VLAN
2133                          * filters we have now. Does not count filters which
2134                          * are marked for deletion.
2135                          */
2136                         if (f->vlan > 0)
2137                                 vlan_filters++;
2138                 }
2139
2140                 retval = i40e_correct_mac_vlan_filters(vsi,
2141                                                        &tmp_add_list,
2142                                                        &tmp_del_list,
2143                                                        vlan_filters);
2144                 if (retval)
2145                         goto err_no_memory_locked;
2146
2147                 spin_unlock_bh(&vsi->mac_filter_hash_lock);
2148         }
2149
2150         /* Now process 'del_list' outside the lock */
2151         if (!hlist_empty(&tmp_del_list)) {
2152                 filter_list_len = hw->aq.asq_buf_size /
2153                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
2154                 list_size = filter_list_len *
2155                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
2156                 del_list = kzalloc(list_size, GFP_ATOMIC);
2157                 if (!del_list)
2158                         goto err_no_memory;
2159
2160                 hlist_for_each_entry_safe(f, h, &tmp_del_list, hlist) {
2161                         cmd_flags = 0;
2162
2163                         /* handle broadcast filters by updating the broadcast
2164                          * promiscuous flag and release filter list.
2165                          */
2166                         if (is_broadcast_ether_addr(f->macaddr)) {
2167                                 i40e_aqc_broadcast_filter(vsi, vsi_name, f);
2168
2169                                 hlist_del(&f->hlist);
2170                                 kfree(f);
2171                                 continue;
2172                         }
2173
2174                         /* add to delete list */
2175                         ether_addr_copy(del_list[num_del].mac_addr, f->macaddr);
2176                         if (f->vlan == I40E_VLAN_ANY) {
2177                                 del_list[num_del].vlan_tag = 0;
2178                                 cmd_flags |= I40E_AQC_MACVLAN_DEL_IGNORE_VLAN;
2179                         } else {
2180                                 del_list[num_del].vlan_tag =
2181                                         cpu_to_le16((u16)(f->vlan));
2182                         }
2183
2184                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
2185                         del_list[num_del].flags = cmd_flags;
2186                         num_del++;
2187
2188                         /* flush a full buffer */
2189                         if (num_del == filter_list_len) {
2190                                 i40e_aqc_del_filters(vsi, vsi_name, del_list,
2191                                                      num_del, &retval);
2192                                 memset(del_list, 0, list_size);
2193                                 num_del = 0;
2194                         }
2195                         /* Release memory for MAC filter entries which were
2196                          * synced up with HW.
2197                          */
2198                         hlist_del(&f->hlist);
2199                         kfree(f);
2200                 }
2201
2202                 if (num_del) {
2203                         i40e_aqc_del_filters(vsi, vsi_name, del_list,
2204                                              num_del, &retval);
2205                 }
2206
2207                 kfree(del_list);
2208                 del_list = NULL;
2209         }
2210
2211         if (!hlist_empty(&tmp_add_list)) {
2212                 /* Do all the adds now. */
2213                 filter_list_len = hw->aq.asq_buf_size /
2214                                sizeof(struct i40e_aqc_add_macvlan_element_data);
2215                 list_size = filter_list_len *
2216                                sizeof(struct i40e_aqc_add_macvlan_element_data);
2217                 add_list = kzalloc(list_size, GFP_ATOMIC);
2218                 if (!add_list)
2219                         goto err_no_memory;
2220
2221                 num_add = 0;
2222                 hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
2223                         if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
2224                                      &vsi->state)) {
2225                                 new->state = I40E_FILTER_FAILED;
2226                                 continue;
2227                         }
2228
2229                         /* handle broadcast filters by updating the broadcast
2230                          * promiscuous flag instead of adding a MAC filter.
2231                          */
2232                         if (is_broadcast_ether_addr(new->f->macaddr)) {
2233                                 if (i40e_aqc_broadcast_filter(vsi, vsi_name,
2234                                                               new->f))
2235                                         new->state = I40E_FILTER_FAILED;
2236                                 else
2237                                         new->state = I40E_FILTER_ACTIVE;
2238                                 continue;
2239                         }
2240
2241                         /* add to add array */
2242                         if (num_add == 0)
2243                                 add_head = new;
2244                         cmd_flags = 0;
2245                         ether_addr_copy(add_list[num_add].mac_addr,
2246                                         new->f->macaddr);
2247                         if (new->f->vlan == I40E_VLAN_ANY) {
2248                                 add_list[num_add].vlan_tag = 0;
2249                                 cmd_flags |= I40E_AQC_MACVLAN_ADD_IGNORE_VLAN;
2250                         } else {
2251                                 add_list[num_add].vlan_tag =
2252                                         cpu_to_le16((u16)(new->f->vlan));
2253                         }
2254                         add_list[num_add].queue_number = 0;
2255                         /* set invalid match method for later detection */
2256                         add_list[num_add].match_method = I40E_AQC_MM_ERR_NO_RES;
2257                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
2258                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
2259                         num_add++;
2260
2261                         /* flush a full buffer */
2262                         if (num_add == filter_list_len) {
2263                                 i40e_aqc_add_filters(vsi, vsi_name, add_list,
2264                                                      add_head, num_add,
2265                                                      &promisc_changed);
2266                                 memset(add_list, 0, list_size);
2267                                 num_add = 0;
2268                         }
2269                 }
2270                 if (num_add) {
2271                         i40e_aqc_add_filters(vsi, vsi_name, add_list, add_head,
2272                                              num_add, &promisc_changed);
2273                 }
2274                 /* Now move all of the filters from the temp add list back to
2275                  * the VSI's list.
2276                  */
2277                 spin_lock_bh(&vsi->mac_filter_hash_lock);
2278                 hlist_for_each_entry_safe(new, h, &tmp_add_list, hlist) {
2279                         /* Only update the state if we're still NEW */
2280                         if (new->f->state == I40E_FILTER_NEW)
2281                                 new->f->state = new->state;
2282                         hlist_del(&new->hlist);
2283                         kfree(new);
2284                 }
2285                 spin_unlock_bh(&vsi->mac_filter_hash_lock);
2286                 kfree(add_list);
2287                 add_list = NULL;
2288         }
2289
2290         /* Determine the number of active and failed filters. */
2291         spin_lock_bh(&vsi->mac_filter_hash_lock);
2292         vsi->active_filters = 0;
2293         hash_for_each(vsi->mac_filter_hash, bkt, f, hlist) {
2294                 if (f->state == I40E_FILTER_ACTIVE)
2295                         vsi->active_filters++;
2296                 else if (f->state == I40E_FILTER_FAILED)
2297                         failed_filters++;
2298         }
2299         spin_unlock_bh(&vsi->mac_filter_hash_lock);
2300
2301         /* If promiscuous mode has changed, we need to calculate a new
2302          * threshold for when we are safe to exit
2303          */
2304         if (promisc_changed)
2305                 vsi->promisc_threshold = (vsi->active_filters * 3) / 4;
2306
2307         /* Check if we are able to exit overflow promiscuous mode. We can
2308          * safely exit if we didn't just enter, we no longer have any failed
2309          * filters, and we have reduced filters below the threshold value.
2310          */
2311         if (test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state) &&
2312             !promisc_changed && !failed_filters &&
2313             (vsi->active_filters < vsi->promisc_threshold)) {
2314                 dev_info(&pf->pdev->dev,
2315                          "filter logjam cleared on %s, leaving overflow promiscuous mode\n",
2316                          vsi_name);
2317                 clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
2318                 promisc_changed = true;
2319                 vsi->promisc_threshold = 0;
2320         }
2321
2322         /* if the VF is not trusted do not do promisc */
2323         if ((vsi->type == I40E_VSI_SRIOV) && !pf->vf[vsi->vf_id].trusted) {
2324                 clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
2325                 goto out;
2326         }
2327
2328         /* check for changes in promiscuous modes */
2329         if (changed_flags & IFF_ALLMULTI) {
2330                 bool cur_multipromisc;
2331
2332                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
2333                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
2334                                                                vsi->seid,
2335                                                                cur_multipromisc,
2336                                                                NULL);
2337                 if (aq_ret) {
2338                         retval = i40e_aq_rc_to_posix(aq_ret,
2339                                                      hw->aq.asq_last_status);
2340                         dev_info(&pf->pdev->dev,
2341                                  "set multi promisc failed on %s, err %s aq_err %s\n",
2342                                  vsi_name,
2343                                  i40e_stat_str(hw, aq_ret),
2344                                  i40e_aq_str(hw, hw->aq.asq_last_status));
2345                 }
2346         }
2347         if ((changed_flags & IFF_PROMISC) ||
2348             (promisc_changed &&
2349              test_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state))) {
2350                 bool cur_promisc;
2351
2352                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
2353                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
2354                                         &vsi->state));
2355                 if ((vsi->type == I40E_VSI_MAIN) &&
2356                     (pf->lan_veb != I40E_NO_VEB) &&
2357                     !(pf->flags & I40E_FLAG_MFP_ENABLED)) {
2358                         /* set defport ON for Main VSI instead of true promisc
2359                          * this way we will get all unicast/multicast and VLAN
2360                          * promisc behavior but will not get VF or VMDq traffic
2361                          * replicated on the Main VSI.
2362                          */
2363                         if (pf->cur_promisc != cur_promisc) {
2364                                 pf->cur_promisc = cur_promisc;
2365                                 if (cur_promisc)
2366                                         aq_ret =
2367                                               i40e_aq_set_default_vsi(hw,
2368                                                                       vsi->seid,
2369                                                                       NULL);
2370                                 else
2371                                         aq_ret =
2372                                             i40e_aq_clear_default_vsi(hw,
2373                                                                       vsi->seid,
2374                                                                       NULL);
2375                                 if (aq_ret) {
2376                                         retval = i40e_aq_rc_to_posix(aq_ret,
2377                                                         hw->aq.asq_last_status);
2378                                         dev_info(&pf->pdev->dev,
2379                                                  "Set default VSI failed on %s, err %s, aq_err %s\n",
2380                                                  vsi_name,
2381                                                  i40e_stat_str(hw, aq_ret),
2382                                                  i40e_aq_str(hw,
2383                                                      hw->aq.asq_last_status));
2384                                 }
2385                         }
2386                 } else {
2387                         aq_ret = i40e_aq_set_vsi_unicast_promiscuous(
2388                                                           hw,
2389                                                           vsi->seid,
2390                                                           cur_promisc, NULL,
2391                                                           true);
2392                         if (aq_ret) {
2393                                 retval =
2394                                 i40e_aq_rc_to_posix(aq_ret,
2395                                                     hw->aq.asq_last_status);
2396                                 dev_info(&pf->pdev->dev,
2397                                          "set unicast promisc failed on %s, err %s, aq_err %s\n",
2398                                          vsi_name,
2399                                          i40e_stat_str(hw, aq_ret),
2400                                          i40e_aq_str(hw,
2401                                                      hw->aq.asq_last_status));
2402                         }
2403                         aq_ret = i40e_aq_set_vsi_multicast_promiscuous(
2404                                                           hw,
2405                                                           vsi->seid,
2406                                                           cur_promisc, NULL);
2407                         if (aq_ret) {
2408                                 retval =
2409                                 i40e_aq_rc_to_posix(aq_ret,
2410                                                     hw->aq.asq_last_status);
2411                                 dev_info(&pf->pdev->dev,
2412                                          "set multicast promisc failed on %s, err %s, aq_err %s\n",
2413                                          vsi_name,
2414                                          i40e_stat_str(hw, aq_ret),
2415                                          i40e_aq_str(hw,
2416                                                      hw->aq.asq_last_status));
2417                         }
2418                 }
2419                 aq_ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
2420                                                    vsi->seid,
2421                                                    cur_promisc, NULL);
2422                 if (aq_ret) {
2423                         retval = i40e_aq_rc_to_posix(aq_ret,
2424                                                      pf->hw.aq.asq_last_status);
2425                         dev_info(&pf->pdev->dev,
2426                                  "set brdcast promisc failed, err %s, aq_err %s\n",
2427                                          i40e_stat_str(hw, aq_ret),
2428                                          i40e_aq_str(hw,
2429                                                      hw->aq.asq_last_status));
2430                 }
2431         }
2432 out:
2433         /* if something went wrong then set the changed flag so we try again */
2434         if (retval)
2435                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
2436
2437         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
2438         return retval;
2439
2440 err_no_memory:
2441         /* Restore elements on the temporary add and delete lists */
2442         spin_lock_bh(&vsi->mac_filter_hash_lock);
2443 err_no_memory_locked:
2444         i40e_undo_del_filter_entries(vsi, &tmp_del_list);
2445         i40e_undo_add_filter_entries(vsi, &tmp_add_list);
2446         spin_unlock_bh(&vsi->mac_filter_hash_lock);
2447
2448         vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
2449         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
2450         return -ENOMEM;
2451 }
2452
2453 /**
2454  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
2455  * @pf: board private structure
2456  **/
2457 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
2458 {
2459         int v;
2460
2461         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
2462                 return;
2463         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
2464
2465         for (v = 0; v < pf->num_alloc_vsi; v++) {
2466                 if (pf->vsi[v] &&
2467                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED)) {
2468                         int ret = i40e_sync_vsi_filters(pf->vsi[v]);
2469
2470                         if (ret) {
2471                                 /* come back and try again later */
2472                                 pf->flags |= I40E_FLAG_FILTER_SYNC;
2473                                 break;
2474                         }
2475                 }
2476         }
2477 }
2478
2479 /**
2480  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
2481  * @netdev: network interface device structure
2482  * @new_mtu: new value for maximum frame size
2483  *
2484  * Returns 0 on success, negative on failure
2485  **/
2486 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
2487 {
2488         struct i40e_netdev_priv *np = netdev_priv(netdev);
2489         struct i40e_vsi *vsi = np->vsi;
2490         struct i40e_pf *pf = vsi->back;
2491
2492         netdev_info(netdev, "changing MTU from %d to %d\n",
2493                     netdev->mtu, new_mtu);
2494         netdev->mtu = new_mtu;
2495         if (netif_running(netdev))
2496                 i40e_vsi_reinit_locked(vsi);
2497         pf->flags |= (I40E_FLAG_SERVICE_CLIENT_REQUESTED |
2498                       I40E_FLAG_CLIENT_L2_CHANGE);
2499         return 0;
2500 }
2501
2502 /**
2503  * i40e_ioctl - Access the hwtstamp interface
2504  * @netdev: network interface device structure
2505  * @ifr: interface request data
2506  * @cmd: ioctl command
2507  **/
2508 int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2509 {
2510         struct i40e_netdev_priv *np = netdev_priv(netdev);
2511         struct i40e_pf *pf = np->vsi->back;
2512
2513         switch (cmd) {
2514         case SIOCGHWTSTAMP:
2515                 return i40e_ptp_get_ts_config(pf, ifr);
2516         case SIOCSHWTSTAMP:
2517                 return i40e_ptp_set_ts_config(pf, ifr);
2518         default:
2519                 return -EOPNOTSUPP;
2520         }
2521 }
2522
2523 /**
2524  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
2525  * @vsi: the vsi being adjusted
2526  **/
2527 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
2528 {
2529         struct i40e_vsi_context ctxt;
2530         i40e_status ret;
2531
2532         if ((vsi->info.valid_sections &
2533              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
2534             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
2535                 return;  /* already enabled */
2536
2537         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2538         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
2539                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
2540
2541         ctxt.seid = vsi->seid;
2542         ctxt.info = vsi->info;
2543         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2544         if (ret) {
2545                 dev_info(&vsi->back->pdev->dev,
2546                          "update vlan stripping failed, err %s aq_err %s\n",
2547                          i40e_stat_str(&vsi->back->hw, ret),
2548                          i40e_aq_str(&vsi->back->hw,
2549                                      vsi->back->hw.aq.asq_last_status));
2550         }
2551 }
2552
2553 /**
2554  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
2555  * @vsi: the vsi being adjusted
2556  **/
2557 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
2558 {
2559         struct i40e_vsi_context ctxt;
2560         i40e_status ret;
2561
2562         if ((vsi->info.valid_sections &
2563              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
2564             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
2565              I40E_AQ_VSI_PVLAN_EMOD_MASK))
2566                 return;  /* already disabled */
2567
2568         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2569         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
2570                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
2571
2572         ctxt.seid = vsi->seid;
2573         ctxt.info = vsi->info;
2574         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2575         if (ret) {
2576                 dev_info(&vsi->back->pdev->dev,
2577                          "update vlan stripping failed, err %s aq_err %s\n",
2578                          i40e_stat_str(&vsi->back->hw, ret),
2579                          i40e_aq_str(&vsi->back->hw,
2580                                      vsi->back->hw.aq.asq_last_status));
2581         }
2582 }
2583
2584 /**
2585  * i40e_vlan_rx_register - Setup or shutdown vlan offload
2586  * @netdev: network interface to be adjusted
2587  * @features: netdev features to test if VLAN offload is enabled or not
2588  **/
2589 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
2590 {
2591         struct i40e_netdev_priv *np = netdev_priv(netdev);
2592         struct i40e_vsi *vsi = np->vsi;
2593
2594         if (features & NETIF_F_HW_VLAN_CTAG_RX)
2595                 i40e_vlan_stripping_enable(vsi);
2596         else
2597                 i40e_vlan_stripping_disable(vsi);
2598 }
2599
2600 /**
2601  * i40e_add_vlan_all_mac - Add a MAC/VLAN filter for each existing MAC address
2602  * @vsi: the vsi being configured
2603  * @vid: vlan id to be added (0 = untagged only , -1 = any)
2604  *
2605  * This is a helper function for adding a new MAC/VLAN filter with the
2606  * specified VLAN for each existing MAC address already in the hash table.
2607  * This function does *not* perform any accounting to update filters based on
2608  * VLAN mode.
2609  *
2610  * NOTE: this function expects to be called while under the
2611  * mac_filter_hash_lock
2612  **/
2613 int i40e_add_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
2614 {
2615         struct i40e_mac_filter *f, *add_f;
2616         struct hlist_node *h;
2617         int bkt;
2618
2619         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
2620                 if (f->state == I40E_FILTER_REMOVE)
2621                         continue;
2622                 add_f = i40e_add_filter(vsi, f->macaddr, vid);
2623                 if (!add_f) {
2624                         dev_info(&vsi->back->pdev->dev,
2625                                  "Could not add vlan filter %d for %pM\n",
2626                                  vid, f->macaddr);
2627                         return -ENOMEM;
2628                 }
2629         }
2630
2631         return 0;
2632 }
2633
2634 /**
2635  * i40e_vsi_add_vlan - Add VSI membership for given VLAN
2636  * @vsi: the VSI being configured
2637  * @vid: VLAN id to be added
2638  **/
2639 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, u16 vid)
2640 {
2641         int err;
2642
2643         if (!vid || vsi->info.pvid)
2644                 return -EINVAL;
2645
2646         /* Locked once because all functions invoked below iterates list*/
2647         spin_lock_bh(&vsi->mac_filter_hash_lock);
2648         err = i40e_add_vlan_all_mac(vsi, vid);
2649         spin_unlock_bh(&vsi->mac_filter_hash_lock);
2650         if (err)
2651                 return err;
2652
2653         /* schedule our worker thread which will take care of
2654          * applying the new filter changes
2655          */
2656         i40e_service_event_schedule(vsi->back);
2657         return 0;
2658 }
2659
2660 /**
2661  * i40e_rm_vlan_all_mac - Remove MAC/VLAN pair for all MAC with the given VLAN
2662  * @vsi: the vsi being configured
2663  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
2664  *
2665  * This function should be used to remove all VLAN filters which match the
2666  * given VID. It does not schedule the service event and does not take the
2667  * mac_filter_hash_lock so it may be combined with other operations under
2668  * a single invocation of the mac_filter_hash_lock.
2669  *
2670  * NOTE: this function expects to be called while under the
2671  * mac_filter_hash_lock
2672  */
2673 void i40e_rm_vlan_all_mac(struct i40e_vsi *vsi, s16 vid)
2674 {
2675         struct i40e_mac_filter *f;
2676         struct hlist_node *h;
2677         int bkt;
2678
2679         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
2680                 if (f->vlan == vid)
2681                         __i40e_del_filter(vsi, f);
2682         }
2683 }
2684
2685 /**
2686  * i40e_vsi_kill_vlan - Remove VSI membership for given VLAN
2687  * @vsi: the VSI being configured
2688  * @vid: VLAN id to be removed
2689  **/
2690 void i40e_vsi_kill_vlan(struct i40e_vsi *vsi, u16 vid)
2691 {
2692         if (!vid || vsi->info.pvid)
2693                 return;
2694
2695         spin_lock_bh(&vsi->mac_filter_hash_lock);
2696         i40e_rm_vlan_all_mac(vsi, vid);
2697         spin_unlock_bh(&vsi->mac_filter_hash_lock);
2698
2699         /* schedule our worker thread which will take care of
2700          * applying the new filter changes
2701          */
2702         i40e_service_event_schedule(vsi->back);
2703 }
2704
2705 /**
2706  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
2707  * @netdev: network interface to be adjusted
2708  * @vid: vlan id to be added
2709  *
2710  * net_device_ops implementation for adding vlan ids
2711  **/
2712 #ifdef I40E_FCOE
2713 int i40e_vlan_rx_add_vid(struct net_device *netdev,
2714                          __always_unused __be16 proto, u16 vid)
2715 #else
2716 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
2717                                 __always_unused __be16 proto, u16 vid)
2718 #endif
2719 {
2720         struct i40e_netdev_priv *np = netdev_priv(netdev);
2721         struct i40e_vsi *vsi = np->vsi;
2722         int ret = 0;
2723
2724         if (vid >= VLAN_N_VID)
2725                 return -EINVAL;
2726
2727         /* If the network stack called us with vid = 0 then
2728          * it is asking to receive priority tagged packets with
2729          * vlan id 0.  Our HW receives them by default when configured
2730          * to receive untagged packets so there is no need to add an
2731          * extra filter for vlan 0 tagged packets.
2732          */
2733         if (vid)
2734                 ret = i40e_vsi_add_vlan(vsi, vid);
2735
2736         if (!ret)
2737                 set_bit(vid, vsi->active_vlans);
2738
2739         return ret;
2740 }
2741
2742 /**
2743  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
2744  * @netdev: network interface to be adjusted
2745  * @vid: vlan id to be removed
2746  *
2747  * net_device_ops implementation for removing vlan ids
2748  **/
2749 #ifdef I40E_FCOE
2750 int i40e_vlan_rx_kill_vid(struct net_device *netdev,
2751                           __always_unused __be16 proto, u16 vid)
2752 #else
2753 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
2754                                  __always_unused __be16 proto, u16 vid)
2755 #endif
2756 {
2757         struct i40e_netdev_priv *np = netdev_priv(netdev);
2758         struct i40e_vsi *vsi = np->vsi;
2759
2760         /* return code is ignored as there is nothing a user
2761          * can do about failure to remove and a log message was
2762          * already printed from the other function
2763          */
2764         i40e_vsi_kill_vlan(vsi, vid);
2765
2766         clear_bit(vid, vsi->active_vlans);
2767
2768         return 0;
2769 }
2770
2771 /**
2772  * i40e_macaddr_init - explicitly write the mac address filters
2773  *
2774  * @vsi: pointer to the vsi
2775  * @macaddr: the MAC address
2776  *
2777  * This is needed when the macaddr has been obtained by other
2778  * means than the default, e.g., from Open Firmware or IDPROM.
2779  * Returns 0 on success, negative on failure
2780  **/
2781 static int i40e_macaddr_init(struct i40e_vsi *vsi, u8 *macaddr)
2782 {
2783         int ret;
2784         struct i40e_aqc_add_macvlan_element_data element;
2785
2786         ret = i40e_aq_mac_address_write(&vsi->back->hw,
2787                                         I40E_AQC_WRITE_TYPE_LAA_WOL,
2788                                         macaddr, NULL);
2789         if (ret) {
2790                 dev_info(&vsi->back->pdev->dev,
2791                          "Addr change for VSI failed: %d\n", ret);
2792                 return -EADDRNOTAVAIL;
2793         }
2794
2795         memset(&element, 0, sizeof(element));
2796         ether_addr_copy(element.mac_addr, macaddr);
2797         element.flags = cpu_to_le16(I40E_AQC_MACVLAN_ADD_PERFECT_MATCH);
2798         ret = i40e_aq_add_macvlan(&vsi->back->hw, vsi->seid, &element, 1, NULL);
2799         if (ret) {
2800                 dev_info(&vsi->back->pdev->dev,
2801                          "add filter failed err %s aq_err %s\n",
2802                          i40e_stat_str(&vsi->back->hw, ret),
2803                          i40e_aq_str(&vsi->back->hw,
2804                                      vsi->back->hw.aq.asq_last_status));
2805         }
2806         return ret;
2807 }
2808
2809 /**
2810  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
2811  * @vsi: the vsi being brought back up
2812  **/
2813 static void i40e_restore_vlan(struct i40e_vsi *vsi)
2814 {
2815         u16 vid;
2816
2817         if (!vsi->netdev)
2818                 return;
2819
2820         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2821
2822         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
2823                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
2824                                      vid);
2825 }
2826
2827 /**
2828  * i40e_vsi_add_pvid - Add pvid for the VSI
2829  * @vsi: the vsi being adjusted
2830  * @vid: the vlan id to set as a PVID
2831  **/
2832 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2833 {
2834         struct i40e_vsi_context ctxt;
2835         i40e_status ret;
2836
2837         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2838         vsi->info.pvid = cpu_to_le16(vid);
2839         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
2840                                     I40E_AQ_VSI_PVLAN_INSERT_PVID |
2841                                     I40E_AQ_VSI_PVLAN_EMOD_STR;
2842
2843         ctxt.seid = vsi->seid;
2844         ctxt.info = vsi->info;
2845         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2846         if (ret) {
2847                 dev_info(&vsi->back->pdev->dev,
2848                          "add pvid failed, err %s aq_err %s\n",
2849                          i40e_stat_str(&vsi->back->hw, ret),
2850                          i40e_aq_str(&vsi->back->hw,
2851                                      vsi->back->hw.aq.asq_last_status));
2852                 return -ENOENT;
2853         }
2854
2855         return 0;
2856 }
2857
2858 /**
2859  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2860  * @vsi: the vsi being adjusted
2861  *
2862  * Just use the vlan_rx_register() service to put it back to normal
2863  **/
2864 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2865 {
2866         i40e_vlan_stripping_disable(vsi);
2867
2868         vsi->info.pvid = 0;
2869 }
2870
2871 /**
2872  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2873  * @vsi: ptr to the VSI
2874  *
2875  * If this function returns with an error, then it's possible one or
2876  * more of the rings is populated (while the rest are not).  It is the
2877  * callers duty to clean those orphaned rings.
2878  *
2879  * Return 0 on success, negative on failure
2880  **/
2881 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2882 {
2883         int i, err = 0;
2884
2885         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2886                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2887
2888         return err;
2889 }
2890
2891 /**
2892  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2893  * @vsi: ptr to the VSI
2894  *
2895  * Free VSI's transmit software resources
2896  **/
2897 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2898 {
2899         int i;
2900
2901         if (!vsi->tx_rings)
2902                 return;
2903
2904         for (i = 0; i < vsi->num_queue_pairs; i++)
2905                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
2906                         i40e_free_tx_resources(vsi->tx_rings[i]);
2907 }
2908
2909 /**
2910  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2911  * @vsi: ptr to the VSI
2912  *
2913  * If this function returns with an error, then it's possible one or
2914  * more of the rings is populated (while the rest are not).  It is the
2915  * callers duty to clean those orphaned rings.
2916  *
2917  * Return 0 on success, negative on failure
2918  **/
2919 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2920 {
2921         int i, err = 0;
2922
2923         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2924                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2925 #ifdef I40E_FCOE
2926         i40e_fcoe_setup_ddp_resources(vsi);
2927 #endif
2928         return err;
2929 }
2930
2931 /**
2932  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2933  * @vsi: ptr to the VSI
2934  *
2935  * Free all receive software resources
2936  **/
2937 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2938 {
2939         int i;
2940
2941         if (!vsi->rx_rings)
2942                 return;
2943
2944         for (i = 0; i < vsi->num_queue_pairs; i++)
2945                 if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
2946                         i40e_free_rx_resources(vsi->rx_rings[i]);
2947 #ifdef I40E_FCOE
2948         i40e_fcoe_free_ddp_resources(vsi);
2949 #endif
2950 }
2951
2952 /**
2953  * i40e_config_xps_tx_ring - Configure XPS for a Tx ring
2954  * @ring: The Tx ring to configure
2955  *
2956  * This enables/disables XPS for a given Tx descriptor ring
2957  * based on the TCs enabled for the VSI that ring belongs to.
2958  **/
2959 static void i40e_config_xps_tx_ring(struct i40e_ring *ring)
2960 {
2961         struct i40e_vsi *vsi = ring->vsi;
2962         cpumask_var_t mask;
2963
2964         if (!ring->q_vector || !ring->netdev)
2965                 return;
2966
2967         /* Single TC mode enable XPS */
2968         if (vsi->tc_config.numtc <= 1) {
2969                 if (!test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2970                         netif_set_xps_queue(ring->netdev,
2971                                             &ring->q_vector->affinity_mask,
2972                                             ring->queue_index);
2973         } else if (alloc_cpumask_var(&mask, GFP_KERNEL)) {
2974                 /* Disable XPS to allow selection based on TC */
2975                 bitmap_zero(cpumask_bits(mask), nr_cpumask_bits);
2976                 netif_set_xps_queue(ring->netdev, mask, ring->queue_index);
2977                 free_cpumask_var(mask);
2978         }
2979
2980         /* schedule our worker thread which will take care of
2981          * applying the new filter changes
2982          */
2983         i40e_service_event_schedule(vsi->back);
2984 }
2985
2986 /**
2987  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2988  * @ring: The Tx ring to configure
2989  *
2990  * Configure the Tx descriptor ring in the HMC context.
2991  **/
2992 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2993 {
2994         struct i40e_vsi *vsi = ring->vsi;
2995         u16 pf_q = vsi->base_queue + ring->queue_index;
2996         struct i40e_hw *hw = &vsi->back->hw;
2997         struct i40e_hmc_obj_txq tx_ctx;
2998         i40e_status err = 0;
2999         u32 qtx_ctl = 0;
3000
3001         /* some ATR related tx ring init */
3002         if (vsi->back->flags & I40E_FLAG_FD_ATR_ENABLED) {
3003                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
3004                 ring->atr_count = 0;
3005         } else {
3006                 ring->atr_sample_rate = 0;
3007         }
3008
3009         /* configure XPS */
3010         i40e_config_xps_tx_ring(ring);
3011
3012         /* clear the context structure first */
3013         memset(&tx_ctx, 0, sizeof(tx_ctx));
3014
3015         tx_ctx.new_context = 1;
3016         tx_ctx.base = (ring->dma / 128);
3017         tx_ctx.qlen = ring->count;
3018         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FD_SB_ENABLED |
3019                                                I40E_FLAG_FD_ATR_ENABLED));
3020 #ifdef I40E_FCOE
3021         tx_ctx.fc_ena = (vsi->type == I40E_VSI_FCOE);
3022 #endif
3023         tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP);
3024         /* FDIR VSI tx ring can still use RS bit and writebacks */
3025         if (vsi->type != I40E_VSI_FDIR)
3026                 tx_ctx.head_wb_ena = 1;
3027         tx_ctx.head_wb_addr = ring->dma +
3028                               (ring->count * sizeof(struct i40e_tx_desc));
3029
3030         /* As part of VSI creation/update, FW allocates certain
3031          * Tx arbitration queue sets for each TC enabled for
3032          * the VSI. The FW returns the handles to these queue
3033          * sets as part of the response buffer to Add VSI,
3034          * Update VSI, etc. AQ commands. It is expected that
3035          * these queue set handles be associated with the Tx
3036          * queues by the driver as part of the TX queue context
3037          * initialization. This has to be done regardless of
3038          * DCB as by default everything is mapped to TC0.
3039          */
3040         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
3041         tx_ctx.rdylist_act = 0;
3042
3043         /* clear the context in the HMC */
3044         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
3045         if (err) {
3046                 dev_info(&vsi->back->pdev->dev,
3047                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
3048                          ring->queue_index, pf_q, err);
3049                 return -ENOMEM;
3050         }
3051
3052         /* set the context in the HMC */
3053         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
3054         if (err) {
3055                 dev_info(&vsi->back->pdev->dev,
3056                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
3057                          ring->queue_index, pf_q, err);
3058                 return -ENOMEM;
3059         }
3060
3061         /* Now associate this queue with this PCI function */
3062         if (vsi->type == I40E_VSI_VMDQ2) {
3063                 qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
3064                 qtx_ctl |= ((vsi->id) << I40E_QTX_CTL_VFVM_INDX_SHIFT) &
3065                            I40E_QTX_CTL_VFVM_INDX_MASK;
3066         } else {
3067                 qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
3068         }
3069
3070         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
3071                     I40E_QTX_CTL_PF_INDX_MASK);
3072         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
3073         i40e_flush(hw);
3074
3075         /* cache tail off for easier writes later */
3076         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
3077
3078         return 0;
3079 }
3080
3081 /**
3082  * i40e_configure_rx_ring - Configure a receive ring context
3083  * @ring: The Rx ring to configure
3084  *
3085  * Configure the Rx descriptor ring in the HMC context.
3086  **/
3087 static int i40e_configure_rx_ring(struct i40e_ring *ring)
3088 {
3089         struct i40e_vsi *vsi = ring->vsi;
3090         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
3091         u16 pf_q = vsi->base_queue + ring->queue_index;
3092         struct i40e_hw *hw = &vsi->back->hw;
3093         struct i40e_hmc_obj_rxq rx_ctx;
3094         i40e_status err = 0;
3095
3096         ring->state = 0;
3097
3098         /* clear the context structure first */
3099         memset(&rx_ctx, 0, sizeof(rx_ctx));
3100
3101         ring->rx_buf_len = vsi->rx_buf_len;
3102
3103         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
3104
3105         rx_ctx.base = (ring->dma / 128);
3106         rx_ctx.qlen = ring->count;
3107
3108         /* use 32 byte descriptors */
3109         rx_ctx.dsize = 1;
3110
3111         /* descriptor type is always zero
3112          * rx_ctx.dtype = 0;
3113          */
3114         rx_ctx.hsplit_0 = 0;
3115
3116         rx_ctx.rxmax = min_t(u16, vsi->max_frame, chain_len * ring->rx_buf_len);
3117         if (hw->revision_id == 0)
3118                 rx_ctx.lrxqthresh = 0;
3119         else
3120                 rx_ctx.lrxqthresh = 2;
3121         rx_ctx.crcstrip = 1;
3122         rx_ctx.l2tsel = 1;
3123         /* this controls whether VLAN is stripped from inner headers */
3124         rx_ctx.showiv = 0;
3125 #ifdef I40E_FCOE
3126         rx_ctx.fc_ena = (vsi->type == I40E_VSI_FCOE);
3127 #endif
3128         /* set the prefena field to 1 because the manual says to */
3129         rx_ctx.prefena = 1;
3130
3131         /* clear the context in the HMC */
3132         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
3133         if (err) {
3134                 dev_info(&vsi->back->pdev->dev,
3135                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
3136                          ring->queue_index, pf_q, err);
3137                 return -ENOMEM;
3138         }
3139
3140         /* set the context in the HMC */
3141         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
3142         if (err) {
3143                 dev_info(&vsi->back->pdev->dev,
3144                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
3145                          ring->queue_index, pf_q, err);
3146                 return -ENOMEM;
3147         }
3148
3149         /* cache tail for quicker writes, and clear the reg before use */
3150         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
3151         writel(0, ring->tail);
3152
3153         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
3154
3155         return 0;
3156 }
3157
3158 /**
3159  * i40e_vsi_configure_tx - Configure the VSI for Tx
3160  * @vsi: VSI structure describing this set of rings and resources
3161  *
3162  * Configure the Tx VSI for operation.
3163  **/
3164 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
3165 {
3166         int err = 0;
3167         u16 i;
3168
3169         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
3170                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
3171
3172         return err;
3173 }
3174
3175 /**
3176  * i40e_vsi_configure_rx - Configure the VSI for Rx
3177  * @vsi: the VSI being configured
3178  *
3179  * Configure the Rx VSI for operation.
3180  **/
3181 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
3182 {
3183         int err = 0;
3184         u16 i;
3185
3186         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
3187                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
3188                                + ETH_FCS_LEN + VLAN_HLEN;
3189         else
3190                 vsi->max_frame = I40E_RXBUFFER_2048;
3191
3192         vsi->rx_buf_len = I40E_RXBUFFER_2048;
3193
3194 #ifdef I40E_FCOE
3195         /* setup rx buffer for FCoE */
3196         if ((vsi->type == I40E_VSI_FCOE) &&
3197             (vsi->back->flags & I40E_FLAG_FCOE_ENABLED)) {
3198                 vsi->rx_buf_len = I40E_RXBUFFER_3072;
3199                 vsi->max_frame = I40E_RXBUFFER_3072;
3200         }
3201
3202 #endif /* I40E_FCOE */
3203         /* round up for the chip's needs */
3204         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
3205                                 BIT_ULL(I40E_RXQ_CTX_DBUFF_SHIFT));
3206
3207         /* set up individual rings */
3208         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
3209                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
3210
3211         return err;
3212 }
3213
3214 /**
3215  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
3216  * @vsi: ptr to the VSI
3217  **/
3218 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
3219 {
3220         struct i40e_ring *tx_ring, *rx_ring;
3221         u16 qoffset, qcount;
3222         int i, n;
3223
3224         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
3225                 /* Reset the TC information */
3226                 for (i = 0; i < vsi->num_queue_pairs; i++) {
3227                         rx_ring = vsi->rx_rings[i];
3228                         tx_ring = vsi->tx_rings[i];
3229                         rx_ring->dcb_tc = 0;
3230                         tx_ring->dcb_tc = 0;
3231                 }
3232         }
3233
3234         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
3235                 if (!(vsi->tc_config.enabled_tc & BIT_ULL(n)))
3236                         continue;
3237
3238                 qoffset = vsi->tc_config.tc_info[n].qoffset;
3239                 qcount = vsi->tc_config.tc_info[n].qcount;
3240                 for (i = qoffset; i < (qoffset + qcount); i++) {
3241                         rx_ring = vsi->rx_rings[i];
3242                         tx_ring = vsi->tx_rings[i];
3243                         rx_ring->dcb_tc = n;
3244                         tx_ring->dcb_tc = n;
3245                 }
3246         }
3247 }
3248
3249 /**
3250  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
3251  * @vsi: ptr to the VSI
3252  **/
3253 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
3254 {
3255         struct i40e_pf *pf = vsi->back;
3256         int err;
3257
3258         if (vsi->netdev)
3259                 i40e_set_rx_mode(vsi->netdev);
3260
3261         if (!!(pf->flags & I40E_FLAG_PF_MAC)) {
3262                 err = i40e_macaddr_init(vsi, pf->hw.mac.addr);
3263                 if (err) {
3264                         dev_warn(&pf->pdev->dev,
3265                                  "could not set up macaddr; err %d\n", err);
3266                 }
3267         }
3268 }
3269
3270 /**
3271  * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
3272  * @vsi: Pointer to the targeted VSI
3273  *
3274  * This function replays the hlist on the hw where all the SB Flow Director
3275  * filters were saved.
3276  **/
3277 static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
3278 {
3279         struct i40e_fdir_filter *filter;
3280         struct i40e_pf *pf = vsi->back;
3281         struct hlist_node *node;
3282
3283         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
3284                 return;
3285
3286         hlist_for_each_entry_safe(filter, node,
3287                                   &pf->fdir_filter_list, fdir_node) {
3288                 i40e_add_del_fdir(vsi, filter, true);
3289         }
3290 }
3291
3292 /**
3293  * i40e_vsi_configure - Set up the VSI for action
3294  * @vsi: the VSI being configured
3295  **/
3296 static int i40e_vsi_configure(struct i40e_vsi *vsi)
3297 {
3298         int err;
3299
3300         i40e_set_vsi_rx_mode(vsi);
3301         i40e_restore_vlan(vsi);
3302         i40e_vsi_config_dcb_rings(vsi);
3303         err = i40e_vsi_configure_tx(vsi);
3304         if (!err)
3305                 err = i40e_vsi_configure_rx(vsi);
3306
3307         return err;
3308 }
3309
3310 /**
3311  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
3312  * @vsi: the VSI being configured
3313  **/
3314 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
3315 {
3316         struct i40e_pf *pf = vsi->back;
3317         struct i40e_hw *hw = &pf->hw;
3318         u16 vector;
3319         int i, q;
3320         u32 qp;
3321
3322         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
3323          * and PFINT_LNKLSTn registers, e.g.:
3324          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
3325          */
3326         qp = vsi->base_queue;
3327         vector = vsi->base_vector;
3328         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
3329                 struct i40e_q_vector *q_vector = vsi->q_vectors[i];
3330
3331                 q_vector->itr_countdown = ITR_COUNTDOWN_START;
3332                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_rings[i]->rx_itr_setting);
3333                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
3334                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
3335                      q_vector->rx.itr);
3336                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_rings[i]->tx_itr_setting);
3337                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
3338                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
3339                      q_vector->tx.itr);
3340                 wr32(hw, I40E_PFINT_RATEN(vector - 1),
3341                      i40e_intrl_usec_to_reg(vsi->int_rate_limit));
3342
3343                 /* Linked list for the queuepairs assigned to this vector */
3344                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
3345                 for (q = 0; q < q_vector->num_ringpairs; q++) {
3346                         u32 val;
3347
3348                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
3349                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
3350                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
3351                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
3352                               (I40E_QUEUE_TYPE_TX
3353                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
3354
3355                         wr32(hw, I40E_QINT_RQCTL(qp), val);
3356
3357                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
3358                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
3359                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
3360                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
3361                               (I40E_QUEUE_TYPE_RX
3362                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
3363
3364                         /* Terminate the linked list */
3365                         if (q == (q_vector->num_ringpairs - 1))
3366                                 val |= (I40E_QUEUE_END_OF_LIST
3367                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
3368
3369                         wr32(hw, I40E_QINT_TQCTL(qp), val);
3370                         qp++;
3371                 }
3372         }
3373
3374         i40e_flush(hw);
3375 }
3376
3377 /**
3378  * i40e_enable_misc_int_causes - enable the non-queue interrupts
3379  * @hw: ptr to the hardware info
3380  **/
3381 static void i40e_enable_misc_int_causes(struct i40e_pf *pf)
3382 {
3383         struct i40e_hw *hw = &pf->hw;
3384         u32 val;
3385
3386         /* clear things first */
3387         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
3388         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
3389
3390         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
3391               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
3392               I40E_PFINT_ICR0_ENA_GRST_MASK          |
3393               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
3394               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
3395               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
3396               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
3397               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
3398
3399         if (pf->flags & I40E_FLAG_IWARP_ENABLED)
3400                 val |= I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3401
3402         if (pf->flags & I40E_FLAG_PTP)
3403                 val |= I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
3404
3405         wr32(hw, I40E_PFINT_ICR0_ENA, val);
3406
3407         /* SW_ITR_IDX = 0, but don't change INTENA */
3408         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
3409                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
3410
3411         /* OTHER_ITR_IDX = 0 */
3412         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
3413 }
3414
3415 /**
3416  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
3417  * @vsi: the VSI being configured
3418  **/
3419 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
3420 {
3421         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
3422         struct i40e_pf *pf = vsi->back;
3423         struct i40e_hw *hw = &pf->hw;
3424         u32 val;
3425
3426         /* set the ITR configuration */
3427         q_vector->itr_countdown = ITR_COUNTDOWN_START;
3428         q_vector->rx.itr = ITR_TO_REG(vsi->rx_rings[0]->rx_itr_setting);
3429         q_vector->rx.latency_range = I40E_LOW_LATENCY;
3430         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
3431         q_vector->tx.itr = ITR_TO_REG(vsi->tx_rings[0]->tx_itr_setting);
3432         q_vector->tx.latency_range = I40E_LOW_LATENCY;
3433         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
3434
3435         i40e_enable_misc_int_causes(pf);
3436
3437         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
3438         wr32(hw, I40E_PFINT_LNKLST0, 0);
3439
3440         /* Associate the queue pair to the vector and enable the queue int */
3441         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
3442               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
3443               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
3444
3445         wr32(hw, I40E_QINT_RQCTL(0), val);
3446
3447         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
3448               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
3449               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
3450
3451         wr32(hw, I40E_QINT_TQCTL(0), val);
3452         i40e_flush(hw);
3453 }
3454
3455 /**
3456  * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
3457  * @pf: board private structure
3458  **/
3459 void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
3460 {
3461         struct i40e_hw *hw = &pf->hw;
3462
3463         wr32(hw, I40E_PFINT_DYN_CTL0,
3464              I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
3465         i40e_flush(hw);
3466 }
3467
3468 /**
3469  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
3470  * @pf: board private structure
3471  * @clearpba: true when all pending interrupt events should be cleared
3472  **/
3473 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf, bool clearpba)
3474 {
3475         struct i40e_hw *hw = &pf->hw;
3476         u32 val;
3477
3478         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
3479               (clearpba ? I40E_PFINT_DYN_CTL0_CLEARPBA_MASK : 0) |
3480               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
3481
3482         wr32(hw, I40E_PFINT_DYN_CTL0, val);
3483         i40e_flush(hw);
3484 }
3485
3486 /**
3487  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
3488  * @irq: interrupt number
3489  * @data: pointer to a q_vector
3490  **/
3491 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
3492 {
3493         struct i40e_q_vector *q_vector = data;
3494
3495         if (!q_vector->tx.ring && !q_vector->rx.ring)
3496                 return IRQ_HANDLED;
3497
3498         napi_schedule_irqoff(&q_vector->napi);
3499
3500         return IRQ_HANDLED;
3501 }
3502
3503 /**
3504  * i40e_irq_affinity_notify - Callback for affinity changes
3505  * @notify: context as to what irq was changed
3506  * @mask: the new affinity mask
3507  *
3508  * This is a callback function used by the irq_set_affinity_notifier function
3509  * so that we may register to receive changes to the irq affinity masks.
3510  **/
3511 static void i40e_irq_affinity_notify(struct irq_affinity_notify *notify,
3512                                      const cpumask_t *mask)
3513 {
3514         struct i40e_q_vector *q_vector =
3515                 container_of(notify, struct i40e_q_vector, affinity_notify);
3516
3517         q_vector->affinity_mask = *mask;
3518 }
3519
3520 /**
3521  * i40e_irq_affinity_release - Callback for affinity notifier release
3522  * @ref: internal core kernel usage
3523  *
3524  * This is a callback function used by the irq_set_affinity_notifier function
3525  * to inform the current notification subscriber that they will no longer
3526  * receive notifications.
3527  **/
3528 static void i40e_irq_affinity_release(struct kref *ref) {}
3529
3530 /**
3531  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
3532  * @vsi: the VSI being configured
3533  * @basename: name for the vector
3534  *
3535  * Allocates MSI-X vectors and requests interrupts from the kernel.
3536  **/
3537 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
3538 {
3539         int q_vectors = vsi->num_q_vectors;
3540         struct i40e_pf *pf = vsi->back;
3541         int base = vsi->base_vector;
3542         int rx_int_idx = 0;
3543         int tx_int_idx = 0;
3544         int vector, err;
3545         int irq_num;
3546
3547         for (vector = 0; vector < q_vectors; vector++) {
3548                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
3549
3550                 irq_num = pf->msix_entries[base + vector].vector;
3551
3552                 if (q_vector->tx.ring && q_vector->rx.ring) {
3553                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3554                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
3555                         tx_int_idx++;
3556                 } else if (q_vector->rx.ring) {
3557                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3558                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
3559                 } else if (q_vector->tx.ring) {
3560                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
3561                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
3562                 } else {
3563                         /* skip this unused q_vector */
3564                         continue;
3565                 }
3566                 err = request_irq(irq_num,
3567                                   vsi->irq_handler,
3568                                   0,
3569                                   q_vector->name,
3570                                   q_vector);
3571                 if (err) {
3572                         dev_info(&pf->pdev->dev,
3573                                  "MSIX request_irq failed, error: %d\n", err);
3574                         goto free_queue_irqs;
3575                 }
3576
3577                 /* register for affinity change notifications */
3578                 q_vector->affinity_notify.notify = i40e_irq_affinity_notify;
3579                 q_vector->affinity_notify.release = i40e_irq_affinity_release;
3580                 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
3581                 /* assign the mask for this irq */
3582                 irq_set_affinity_hint(irq_num, &q_vector->affinity_mask);
3583         }
3584
3585         vsi->irqs_ready = true;
3586         return 0;
3587
3588 free_queue_irqs:
3589         while (vector) {
3590                 vector--;
3591                 irq_num = pf->msix_entries[base + vector].vector;
3592                 irq_set_affinity_notifier(irq_num, NULL);
3593                 irq_set_affinity_hint(irq_num, NULL);
3594                 free_irq(irq_num, &vsi->q_vectors[vector]);
3595         }
3596         return err;
3597 }
3598
3599 /**
3600  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
3601  * @vsi: the VSI being un-configured
3602  **/
3603 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
3604 {
3605         struct i40e_pf *pf = vsi->back;
3606         struct i40e_hw *hw = &pf->hw;
3607         int base = vsi->base_vector;
3608         int i;
3609
3610         for (i = 0; i < vsi->num_queue_pairs; i++) {
3611                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
3612                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
3613         }
3614
3615         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3616                 for (i = vsi->base_vector;
3617                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
3618                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
3619
3620                 i40e_flush(hw);
3621                 for (i = 0; i < vsi->num_q_vectors; i++)
3622                         synchronize_irq(pf->msix_entries[i + base].vector);
3623         } else {
3624                 /* Legacy and MSI mode - this stops all interrupt handling */
3625                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
3626                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
3627                 i40e_flush(hw);
3628                 synchronize_irq(pf->pdev->irq);
3629         }
3630 }
3631
3632 /**
3633  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
3634  * @vsi: the VSI being configured
3635  **/
3636 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
3637 {
3638         struct i40e_pf *pf = vsi->back;
3639         int i;
3640
3641         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3642                 for (i = 0; i < vsi->num_q_vectors; i++)
3643                         i40e_irq_dynamic_enable(vsi, i);
3644         } else {
3645                 i40e_irq_dynamic_enable_icr0(pf, true);
3646         }
3647
3648         i40e_flush(&pf->hw);
3649         return 0;
3650 }
3651
3652 /**
3653  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
3654  * @pf: board private structure
3655  **/
3656 static void i40e_stop_misc_vector(struct i40e_pf *pf)
3657 {
3658         /* Disable ICR 0 */
3659         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
3660         i40e_flush(&pf->hw);
3661 }
3662
3663 /**
3664  * i40e_intr - MSI/Legacy and non-queue interrupt handler
3665  * @irq: interrupt number
3666  * @data: pointer to a q_vector
3667  *
3668  * This is the handler used for all MSI/Legacy interrupts, and deals
3669  * with both queue and non-queue interrupts.  This is also used in
3670  * MSIX mode to handle the non-queue interrupts.
3671  **/
3672 static irqreturn_t i40e_intr(int irq, void *data)
3673 {
3674         struct i40e_pf *pf = (struct i40e_pf *)data;
3675         struct i40e_hw *hw = &pf->hw;
3676         irqreturn_t ret = IRQ_NONE;
3677         u32 icr0, icr0_remaining;
3678         u32 val, ena_mask;
3679
3680         icr0 = rd32(hw, I40E_PFINT_ICR0);
3681         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
3682
3683         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
3684         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
3685                 goto enable_intr;
3686
3687         /* if interrupt but no bits showing, must be SWINT */
3688         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
3689             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
3690                 pf->sw_int_count++;
3691
3692         if ((pf->flags & I40E_FLAG_IWARP_ENABLED) &&
3693             (ena_mask & I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK)) {
3694                 ena_mask &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3695                 icr0 &= ~I40E_PFINT_ICR0_ENA_PE_CRITERR_MASK;
3696                 dev_dbg(&pf->pdev->dev, "cleared PE_CRITERR\n");
3697         }
3698
3699         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
3700         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
3701                 struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
3702                 struct i40e_q_vector *q_vector = vsi->q_vectors[0];
3703
3704                 /* We do not have a way to disarm Queue causes while leaving
3705                  * interrupt enabled for all other causes, ideally
3706                  * interrupt should be disabled while we are in NAPI but
3707                  * this is not a performance path and napi_schedule()
3708                  * can deal with rescheduling.
3709                  */
3710                 if (!test_bit(__I40E_DOWN, &pf->state))
3711                         napi_schedule_irqoff(&q_vector->napi);
3712         }
3713
3714         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
3715                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
3716                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
3717                 i40e_debug(&pf->hw, I40E_DEBUG_NVM, "AdminQ event\n");
3718         }
3719
3720         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
3721                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
3722                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
3723         }
3724
3725         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
3726                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
3727                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
3728         }
3729
3730         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
3731                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
3732                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
3733                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
3734                 val = rd32(hw, I40E_GLGEN_RSTAT);
3735                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
3736                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
3737                 if (val == I40E_RESET_CORER) {
3738                         pf->corer_count++;
3739                 } else if (val == I40E_RESET_GLOBR) {
3740                         pf->globr_count++;
3741                 } else if (val == I40E_RESET_EMPR) {
3742                         pf->empr_count++;
3743                         set_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state);
3744                 }
3745         }
3746
3747         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
3748                 icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
3749                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
3750                 dev_info(&pf->pdev->dev, "HMC error info 0x%x, HMC error data 0x%x\n",
3751                          rd32(hw, I40E_PFHMC_ERRORINFO),
3752                          rd32(hw, I40E_PFHMC_ERRORDATA));
3753         }
3754
3755         if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
3756                 u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);
3757
3758                 if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) {
3759                         icr0 &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
3760                         i40e_ptp_tx_hwtstamp(pf);
3761                 }
3762         }
3763
3764         /* If a critical error is pending we have no choice but to reset the
3765          * device.
3766          * Report and mask out any remaining unexpected interrupts.
3767          */
3768         icr0_remaining = icr0 & ena_mask;
3769         if (icr0_remaining) {
3770                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
3771                          icr0_remaining);
3772                 if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
3773                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
3774                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK)) {
3775                         dev_info(&pf->pdev->dev, "device will be reset\n");
3776                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
3777                         i40e_service_event_schedule(pf);
3778                 }
3779                 ena_mask &= ~icr0_remaining;
3780         }
3781         ret = IRQ_HANDLED;
3782
3783 enable_intr:
3784         /* re-enable interrupt causes */
3785         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
3786         if (!test_bit(__I40E_DOWN, &pf->state)) {
3787                 i40e_service_event_schedule(pf);
3788                 i40e_irq_dynamic_enable_icr0(pf, false);
3789         }
3790
3791         return ret;
3792 }
3793
3794 /**
3795  * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
3796  * @tx_ring:  tx ring to clean
3797  * @budget:   how many cleans we're allowed
3798  *
3799  * Returns true if there's any budget left (e.g. the clean is finished)
3800  **/
3801 static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
3802 {
3803         struct i40e_vsi *vsi = tx_ring->vsi;
3804         u16 i = tx_ring->next_to_clean;
3805         struct i40e_tx_buffer *tx_buf;
3806         struct i40e_tx_desc *tx_desc;
3807
3808         tx_buf = &tx_ring->tx_bi[i];
3809         tx_desc = I40E_TX_DESC(tx_ring, i);
3810         i -= tx_ring->count;
3811
3812         do {
3813                 struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;
3814
3815                 /* if next_to_watch is not set then there is no work pending */
3816                 if (!eop_desc)
3817                         break;
3818
3819                 /* prevent any other reads prior to eop_desc */
3820                 read_barrier_depends();
3821
3822                 /* if the descriptor isn't done, no work yet to do */
3823                 if (!(eop_desc->cmd_type_offset_bsz &
3824                       cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
3825                         break;
3826
3827                 /* clear next_to_watch to prevent false hangs */
3828                 tx_buf->next_to_watch = NULL;
3829
3830                 tx_desc->buffer_addr = 0;
3831                 tx_desc->cmd_type_offset_bsz = 0;
3832                 /* move past filter desc */
3833                 tx_buf++;
3834                 tx_desc++;
3835                 i++;
3836                 if (unlikely(!i)) {
3837                         i -= tx_ring->count;
3838                         tx_buf = tx_ring->tx_bi;
3839                         tx_desc = I40E_TX_DESC(tx_ring, 0);
3840                 }
3841                 /* unmap skb header data */
3842                 dma_unmap_single(tx_ring->dev,
3843                                  dma_unmap_addr(tx_buf, dma),
3844                                  dma_unmap_len(tx_buf, len),
3845                                  DMA_TO_DEVICE);
3846                 if (tx_buf->tx_flags & I40E_TX_FLAGS_FD_SB)
3847                         kfree(tx_buf->raw_buf);
3848
3849                 tx_buf->raw_buf = NULL;
3850                 tx_buf->tx_flags = 0;
3851                 tx_buf->next_to_watch = NULL;
3852                 dma_unmap_len_set(tx_buf, len, 0);
3853                 tx_desc->buffer_addr = 0;
3854                 tx_desc->cmd_type_offset_bsz = 0;
3855
3856                 /* move us past the eop_desc for start of next FD desc */
3857                 tx_buf++;
3858                 tx_desc++;
3859                 i++;
3860                 if (unlikely(!i)) {
3861                         i -= tx_ring->count;
3862                         tx_buf = tx_ring->tx_bi;
3863                         tx_desc = I40E_TX_DESC(tx_ring, 0);
3864                 }
3865
3866                 /* update budget accounting */
3867                 budget--;
3868         } while (likely(budget));
3869
3870         i += tx_ring->count;
3871         tx_ring->next_to_clean = i;
3872
3873         if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED)
3874                 i40e_irq_dynamic_enable(vsi, tx_ring->q_vector->v_idx);
3875
3876         return budget > 0;
3877 }
3878
3879 /**
3880  * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
3881  * @irq: interrupt number
3882  * @data: pointer to a q_vector
3883  **/
3884 static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
3885 {
3886         struct i40e_q_vector *q_vector = data;
3887         struct i40e_vsi *vsi;
3888
3889         if (!q_vector->tx.ring)
3890                 return IRQ_HANDLED;
3891
3892         vsi = q_vector->tx.ring->vsi;
3893         i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);
3894
3895         return IRQ_HANDLED;
3896 }
3897
3898 /**
3899  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
3900  * @vsi: the VSI being configured
3901  * @v_idx: vector index
3902  * @qp_idx: queue pair index
3903  **/
3904 static void i40e_map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
3905 {
3906         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3907         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
3908         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
3909
3910         tx_ring->q_vector = q_vector;
3911         tx_ring->next = q_vector->tx.ring;
3912         q_vector->tx.ring = tx_ring;
3913         q_vector->tx.count++;
3914
3915         rx_ring->q_vector = q_vector;
3916         rx_ring->next = q_vector->rx.ring;
3917         q_vector->rx.ring = rx_ring;
3918         q_vector->rx.count++;
3919 }
3920
3921 /**
3922  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
3923  * @vsi: the VSI being configured
3924  *
3925  * This function maps descriptor rings to the queue-specific vectors
3926  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
3927  * one vector per queue pair, but on a constrained vector budget, we
3928  * group the queue pairs as "efficiently" as possible.
3929  **/
3930 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
3931 {
3932         int qp_remaining = vsi->num_queue_pairs;
3933         int q_vectors = vsi->num_q_vectors;
3934         int num_ringpairs;
3935         int v_start = 0;
3936         int qp_idx = 0;
3937
3938         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
3939          * group them so there are multiple queues per vector.
3940          * It is also important to go through all the vectors available to be
3941          * sure that if we don't use all the vectors, that the remaining vectors
3942          * are cleared. This is especially important when decreasing the
3943          * number of queues in use.
3944          */
3945         for (; v_start < q_vectors; v_start++) {
3946                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
3947
3948                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
3949
3950                 q_vector->num_ringpairs = num_ringpairs;
3951
3952                 q_vector->rx.count = 0;
3953                 q_vector->tx.count = 0;
3954                 q_vector->rx.ring = NULL;
3955                 q_vector->tx.ring = NULL;
3956
3957                 while (num_ringpairs--) {
3958                         i40e_map_vector_to_qp(vsi, v_start, qp_idx);
3959                         qp_idx++;
3960                         qp_remaining--;
3961                 }
3962         }
3963 }
3964
3965 /**
3966  * i40e_vsi_request_irq - Request IRQ from the OS
3967  * @vsi: the VSI being configured
3968  * @basename: name for the vector
3969  **/
3970 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
3971 {
3972         struct i40e_pf *pf = vsi->back;
3973         int err;
3974
3975         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3976                 err = i40e_vsi_request_irq_msix(vsi, basename);
3977         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
3978                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
3979                                   pf->int_name, pf);
3980         else
3981                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
3982                                   pf->int_name, pf);
3983
3984         if (err)
3985                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
3986
3987         return err;
3988 }
3989
3990 #ifdef CONFIG_NET_POLL_CONTROLLER
3991 /**
3992  * i40e_netpoll - A Polling 'interrupt' handler
3993  * @netdev: network interface device structure
3994  *
3995  * This is used by netconsole to send skbs without having to re-enable
3996  * interrupts.  It's not called while the normal interrupt routine is executing.
3997  **/
3998 #ifdef I40E_FCOE
3999 void i40e_netpoll(struct net_device *netdev)
4000 #else
4001 static void i40e_netpoll(struct net_device *netdev)
4002 #endif
4003 {
4004         struct i40e_netdev_priv *np = netdev_priv(netdev);
4005         struct i40e_vsi *vsi = np->vsi;
4006         struct i40e_pf *pf = vsi->back;
4007         int i;
4008
4009         /* if interface is down do nothing */
4010         if (test_bit(__I40E_DOWN, &vsi->state))
4011                 return;
4012
4013         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
4014                 for (i = 0; i < vsi->num_q_vectors; i++)
4015                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
4016         } else {
4017                 i40e_intr(pf->pdev->irq, netdev);
4018         }
4019 }
4020 #endif
4021
4022 /**
4023  * i40e_pf_txq_wait - Wait for a PF's Tx queue to be enabled or disabled
4024  * @pf: the PF being configured
4025  * @pf_q: the PF queue
4026  * @enable: enable or disable state of the queue
4027  *
4028  * This routine will wait for the given Tx queue of the PF to reach the
4029  * enabled or disabled state.
4030  * Returns -ETIMEDOUT in case of failing to reach the requested state after
4031  * multiple retries; else will return 0 in case of success.
4032  **/
4033 static int i40e_pf_txq_wait(struct i40e_pf *pf, int pf_q, bool enable)
4034 {
4035         int i;
4036         u32 tx_reg;
4037
4038         for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
4039                 tx_reg = rd32(&pf->hw, I40E_QTX_ENA(pf_q));
4040                 if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
4041                         break;
4042
4043                 usleep_range(10, 20);
4044         }
4045         if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
4046                 return -ETIMEDOUT;
4047
4048         return 0;
4049 }
4050
4051 /**
4052  * i40e_vsi_control_tx - Start or stop a VSI's rings
4053  * @vsi: the VSI being configured
4054  * @enable: start or stop the rings
4055  **/
4056 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
4057 {
4058         struct i40e_pf *pf = vsi->back;
4059         struct i40e_hw *hw = &pf->hw;
4060         int i, j, pf_q, ret = 0;
4061         u32 tx_reg;
4062
4063         pf_q = vsi->base_queue;
4064         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
4065
4066                 /* warn the TX unit of coming changes */
4067                 i40e_pre_tx_queue_cfg(&pf->hw, pf_q, enable);
4068                 if (!enable)
4069                         usleep_range(10, 20);
4070
4071                 for (j = 0; j < 50; j++) {
4072                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
4073                         if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
4074                             ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
4075                                 break;
4076                         usleep_range(1000, 2000);
4077                 }
4078                 /* Skip if the queue is already in the requested state */
4079                 if (enable == !!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
4080                         continue;
4081
4082                 /* turn on/off the queue */
4083                 if (enable) {
4084                         wr32(hw, I40E_QTX_HEAD(pf_q), 0);
4085                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
4086                 } else {
4087                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
4088                 }
4089
4090                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
4091                 /* No waiting for the Tx queue to disable */
4092                 if (!enable && test_bit(__I40E_PORT_TX_SUSPENDED, &pf->state))
4093                         continue;
4094
4095                 /* wait for the change to finish */
4096                 ret = i40e_pf_txq_wait(pf, pf_q, enable);
4097                 if (ret) {
4098                         dev_info(&pf->pdev->dev,
4099                                  "VSI seid %d Tx ring %d %sable timeout\n",
4100                                  vsi->seid, pf_q, (enable ? "en" : "dis"));
4101                         break;
4102                 }
4103         }
4104
4105         if (hw->revision_id == 0)
4106                 mdelay(50);
4107         return ret;
4108 }
4109
4110 /**
4111  * i40e_pf_rxq_wait - Wait for a PF's Rx queue to be enabled or disabled
4112  * @pf: the PF being configured
4113  * @pf_q: the PF queue
4114  * @enable: enable or disable state of the queue
4115  *
4116  * This routine will wait for the given Rx queue of the PF to reach the
4117  * enabled or disabled state.
4118  * Returns -ETIMEDOUT in case of failing to reach the requested state after
4119  * multiple retries; else will return 0 in case of success.
4120  **/
4121 static int i40e_pf_rxq_wait(struct i40e_pf *pf, int pf_q, bool enable)
4122 {
4123         int i;
4124         u32 rx_reg;
4125
4126         for (i = 0; i < I40E_QUEUE_WAIT_RETRY_LIMIT; i++) {
4127                 rx_reg = rd32(&pf->hw, I40E_QRX_ENA(pf_q));
4128                 if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
4129                         break;
4130
4131                 usleep_range(10, 20);
4132         }
4133         if (i >= I40E_QUEUE_WAIT_RETRY_LIMIT)
4134                 return -ETIMEDOUT;
4135
4136         return 0;
4137 }
4138
4139 /**
4140  * i40e_vsi_control_rx - Start or stop a VSI's rings
4141  * @vsi: the VSI being configured
4142  * @enable: start or stop the rings
4143  **/
4144 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
4145 {
4146         struct i40e_pf *pf = vsi->back;
4147         struct i40e_hw *hw = &pf->hw;
4148         int i, j, pf_q, ret = 0;
4149         u32 rx_reg;
4150
4151         pf_q = vsi->base_queue;
4152         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
4153                 for (j = 0; j < 50; j++) {
4154                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
4155                         if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
4156                             ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
4157                                 break;
4158                         usleep_range(1000, 2000);
4159                 }
4160
4161                 /* Skip if the queue is already in the requested state */
4162                 if (enable == !!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
4163                         continue;
4164
4165                 /* turn on/off the queue */
4166                 if (enable)
4167                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
4168                 else
4169                         rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;
4170                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
4171                 /* No waiting for the Tx queue to disable */
4172                 if (!enable && test_bit(__I40E_PORT_TX_SUSPENDED, &pf->state))
4173                         continue;
4174
4175                 /* wait for the change to finish */
4176                 ret = i40e_pf_rxq_wait(pf, pf_q, enable);
4177                 if (ret) {
4178                         dev_info(&pf->pdev->dev,
4179                                  "VSI seid %d Rx ring %d %sable timeout\n",
4180                                  vsi->seid, pf_q, (enable ? "en" : "dis"));
4181                         break;
4182                 }
4183         }
4184
4185         return ret;
4186 }
4187
4188 /**
4189  * i40e_vsi_start_rings - Start a VSI's rings
4190  * @vsi: the VSI being configured
4191  **/
4192 int i40e_vsi_start_rings(struct i40e_vsi *vsi)
4193 {
4194         int ret = 0;
4195
4196         /* do rx first for enable and last for disable */
4197         ret = i40e_vsi_control_rx(vsi, true);
4198         if (ret)
4199                 return ret;
4200         ret = i40e_vsi_control_tx(vsi, true);
4201
4202         return ret;
4203 }
4204
4205 /**
4206  * i40e_vsi_stop_rings - Stop a VSI's rings
4207  * @vsi: the VSI being configured
4208  **/
4209 void i40e_vsi_stop_rings(struct i40e_vsi *vsi)
4210 {
4211         /* do rx first for enable and last for disable
4212          * Ignore return value, we need to shutdown whatever we can
4213          */
4214         i40e_vsi_control_tx(vsi, false);
4215         i40e_vsi_control_rx(vsi, false);
4216 }
4217
4218 /**
4219  * i40e_vsi_free_irq - Free the irq association with the OS
4220  * @vsi: the VSI being configured
4221  **/
4222 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
4223 {
4224         struct i40e_pf *pf = vsi->back;
4225         struct i40e_hw *hw = &pf->hw;
4226         int base = vsi->base_vector;
4227         u32 val, qp;
4228         int i;
4229
4230         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
4231                 if (!vsi->q_vectors)
4232                         return;
4233
4234                 if (!vsi->irqs_ready)
4235                         return;
4236
4237                 vsi->irqs_ready = false;
4238                 for (i = 0; i < vsi->num_q_vectors; i++) {
4239                         int irq_num;
4240                         u16 vector;
4241
4242                         vector = i + base;
4243                         irq_num = pf->msix_entries[vector].vector;
4244
4245                         /* free only the irqs that were actually requested */
4246                         if (!vsi->q_vectors[i] ||
4247                             !vsi->q_vectors[i]->num_ringpairs)
4248                                 continue;
4249
4250                         /* clear the affinity notifier in the IRQ descriptor */
4251                         irq_set_affinity_notifier(irq_num, NULL);
4252                         /* clear the affinity_mask in the IRQ descriptor */
4253                         irq_set_affinity_hint(irq_num, NULL);
4254                         synchronize_irq(irq_num);
4255                         free_irq(irq_num, vsi->q_vectors[i]);
4256
4257                         /* Tear down the interrupt queue link list
4258                          *
4259                          * We know that they come in pairs and always
4260                          * the Rx first, then the Tx.  To clear the
4261                          * link list, stick the EOL value into the
4262                          * next_q field of the registers.
4263                          */
4264                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
4265                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
4266                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4267                         val |= I40E_QUEUE_END_OF_LIST
4268                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4269                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
4270
4271                         while (qp != I40E_QUEUE_END_OF_LIST) {
4272                                 u32 next;
4273
4274                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
4275
4276                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
4277                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
4278                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
4279                                          I40E_QINT_RQCTL_INTEVENT_MASK);
4280
4281                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
4282                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
4283
4284                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
4285
4286                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
4287
4288                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
4289                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
4290
4291                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
4292                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
4293                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
4294                                          I40E_QINT_TQCTL_INTEVENT_MASK);
4295
4296                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
4297                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
4298
4299                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
4300                                 qp = next;
4301                         }
4302                 }
4303         } else {
4304                 free_irq(pf->pdev->irq, pf);
4305
4306                 val = rd32(hw, I40E_PFINT_LNKLST0);
4307                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
4308                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
4309                 val |= I40E_QUEUE_END_OF_LIST
4310                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
4311                 wr32(hw, I40E_PFINT_LNKLST0, val);
4312
4313                 val = rd32(hw, I40E_QINT_RQCTL(qp));
4314                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
4315                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
4316                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
4317                          I40E_QINT_RQCTL_INTEVENT_MASK);
4318
4319                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
4320                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
4321
4322                 wr32(hw, I40E_QINT_RQCTL(qp), val);
4323
4324                 val = rd32(hw, I40E_QINT_TQCTL(qp));
4325
4326                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
4327                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
4328                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
4329                          I40E_QINT_TQCTL_INTEVENT_MASK);
4330
4331                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
4332                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
4333
4334                 wr32(hw, I40E_QINT_TQCTL(qp), val);
4335         }
4336 }
4337
4338 /**
4339  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
4340  * @vsi: the VSI being configured
4341  * @v_idx: Index of vector to be freed
4342  *
4343  * This function frees the memory allocated to the q_vector.  In addition if
4344  * NAPI is enabled it will delete any references to the NAPI struct prior
4345  * to freeing the q_vector.
4346  **/
4347 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
4348 {
4349         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
4350         struct i40e_ring *ring;
4351
4352         if (!q_vector)
4353                 return;
4354
4355         /* disassociate q_vector from rings */
4356         i40e_for_each_ring(ring, q_vector->tx)
4357                 ring->q_vector = NULL;
4358
4359         i40e_for_each_ring(ring, q_vector->rx)
4360                 ring->q_vector = NULL;
4361
4362         /* only VSI w/ an associated netdev is set up w/ NAPI */
4363         if (vsi->netdev)
4364                 netif_napi_del(&q_vector->napi);
4365
4366         vsi->q_vectors[v_idx] = NULL;
4367
4368         kfree_rcu(q_vector, rcu);
4369 }
4370
4371 /**
4372  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
4373  * @vsi: the VSI being un-configured
4374  *
4375  * This frees the memory allocated to the q_vectors and
4376  * deletes references to the NAPI struct.
4377  **/
4378 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
4379 {
4380         int v_idx;
4381
4382         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
4383                 i40e_free_q_vector(vsi, v_idx);
4384 }
4385
4386 /**
4387  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
4388  * @pf: board private structure
4389  **/
4390 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
4391 {
4392         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
4393         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
4394                 pci_disable_msix(pf->pdev);
4395                 kfree(pf->msix_entries);
4396                 pf->msix_entries = NULL;
4397                 kfree(pf->irq_pile);
4398                 pf->irq_pile = NULL;
4399         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
4400                 pci_disable_msi(pf->pdev);
4401         }
4402         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
4403 }
4404
4405 /**
4406  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
4407  * @pf: board private structure
4408  *
4409  * We go through and clear interrupt specific resources and reset the structure
4410  * to pre-load conditions
4411  **/
4412 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
4413 {
4414         int i;
4415
4416         i40e_stop_misc_vector(pf);
4417         if (pf->flags & I40E_FLAG_MSIX_ENABLED && pf->msix_entries) {
4418                 synchronize_irq(pf->msix_entries[0].vector);
4419                 free_irq(pf->msix_entries[0].vector, pf);
4420         }
4421
4422         i40e_put_lump(pf->irq_pile, pf->iwarp_base_vector,
4423                       I40E_IWARP_IRQ_PILE_ID);
4424
4425         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
4426         for (i = 0; i < pf->num_alloc_vsi; i++)
4427                 if (pf->vsi[i])
4428                         i40e_vsi_free_q_vectors(pf->vsi[i]);
4429         i40e_reset_interrupt_capability(pf);
4430 }
4431
4432 /**
4433  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
4434  * @vsi: the VSI being configured
4435  **/
4436 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
4437 {
4438         int q_idx;
4439
4440         if (!vsi->netdev)
4441                 return;
4442
4443         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
4444                 napi_enable(&vsi->q_vectors[q_idx]->napi);
4445 }
4446
4447 /**
4448  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
4449  * @vsi: the VSI being configured
4450  **/
4451 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
4452 {
4453         int q_idx;
4454
4455         if (!vsi->netdev)
4456                 return;
4457
4458         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
4459                 napi_disable(&vsi->q_vectors[q_idx]->napi);
4460 }
4461
4462 /**
4463  * i40e_vsi_close - Shut down a VSI
4464  * @vsi: the vsi to be quelled
4465  **/
4466 static void i40e_vsi_close(struct i40e_vsi *vsi)
4467 {
4468         struct i40e_pf *pf = vsi->back;
4469         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
4470                 i40e_down(vsi);
4471         i40e_vsi_free_irq(vsi);
4472         i40e_vsi_free_tx_resources(vsi);
4473         i40e_vsi_free_rx_resources(vsi);
4474         vsi->current_netdev_flags = 0;
4475         pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
4476         if (test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
4477                 pf->flags |=  I40E_FLAG_CLIENT_RESET;
4478 }
4479
4480 /**
4481  * i40e_quiesce_vsi - Pause a given VSI
4482  * @vsi: the VSI being paused
4483  **/
4484 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
4485 {
4486         if (test_bit(__I40E_DOWN, &vsi->state))
4487                 return;
4488
4489         /* No need to disable FCoE VSI when Tx suspended */
4490         if ((test_bit(__I40E_PORT_TX_SUSPENDED, &vsi->back->state)) &&
4491             vsi->type == I40E_VSI_FCOE) {
4492                 dev_dbg(&vsi->back->pdev->dev,
4493                          "VSI seid %d skipping FCoE VSI disable\n", vsi->seid);
4494                 return;
4495         }
4496
4497         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
4498         if (vsi->netdev && netif_running(vsi->netdev))
4499                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
4500         else
4501                 i40e_vsi_close(vsi);
4502 }
4503
4504 /**
4505  * i40e_unquiesce_vsi - Resume a given VSI
4506  * @vsi: the VSI being resumed
4507  **/
4508 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
4509 {
4510         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
4511                 return;
4512
4513         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
4514         if (vsi->netdev && netif_running(vsi->netdev))
4515                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
4516         else
4517                 i40e_vsi_open(vsi);   /* this clears the DOWN bit */
4518 }
4519
4520 /**
4521  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
4522  * @pf: the PF
4523  **/
4524 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
4525 {
4526         int v;
4527
4528         for (v = 0; v < pf->num_alloc_vsi; v++) {
4529                 if (pf->vsi[v])
4530                         i40e_quiesce_vsi(pf->vsi[v]);
4531         }
4532 }
4533
4534 /**
4535  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
4536  * @pf: the PF
4537  **/
4538 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
4539 {
4540         int v;
4541
4542         for (v = 0; v < pf->num_alloc_vsi; v++) {
4543                 if (pf->vsi[v])
4544                         i40e_unquiesce_vsi(pf->vsi[v]);
4545         }
4546 }
4547
4548 #ifdef CONFIG_I40E_DCB
4549 /**
4550  * i40e_vsi_wait_queues_disabled - Wait for VSI's queues to be disabled
4551  * @vsi: the VSI being configured
4552  *
4553  * This function waits for the given VSI's queues to be disabled.
4554  **/
4555 static int i40e_vsi_wait_queues_disabled(struct i40e_vsi *vsi)
4556 {
4557         struct i40e_pf *pf = vsi->back;
4558         int i, pf_q, ret;
4559
4560         pf_q = vsi->base_queue;
4561         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
4562                 /* Check and wait for the disable status of the queue */
4563                 ret = i40e_pf_txq_wait(pf, pf_q, false);
4564                 if (ret) {
4565                         dev_info(&pf->pdev->dev,
4566                                  "VSI seid %d Tx ring %d disable timeout\n",
4567                                  vsi->seid, pf_q);
4568                         return ret;
4569                 }
4570         }
4571
4572         pf_q = vsi->base_queue;
4573         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
4574                 /* Check and wait for the disable status of the queue */
4575                 ret = i40e_pf_rxq_wait(pf, pf_q, false);
4576                 if (ret) {
4577                         dev_info(&pf->pdev->dev,
4578                                  "VSI seid %d Rx ring %d disable timeout\n",
4579                                  vsi->seid, pf_q);
4580                         return ret;
4581                 }
4582         }
4583
4584         return 0;
4585 }
4586
4587 /**
4588  * i40e_pf_wait_queues_disabled - Wait for all queues of PF VSIs to be disabled
4589  * @pf: the PF
4590  *
4591  * This function waits for the queues to be in disabled state for all the
4592  * VSIs that are managed by this PF.
4593  **/
4594 static int i40e_pf_wait_queues_disabled(struct i40e_pf *pf)
4595 {
4596         int v, ret = 0;
4597
4598         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4599                 /* No need to wait for FCoE VSI queues */
4600                 if (pf->vsi[v] && pf->vsi[v]->type != I40E_VSI_FCOE) {
4601                         ret = i40e_vsi_wait_queues_disabled(pf->vsi[v]);
4602                         if (ret)
4603                                 break;
4604                 }
4605         }
4606
4607         return ret;
4608 }
4609
4610 #endif
4611
4612 /**
4613  * i40e_detect_recover_hung_queue - Function to detect and recover hung_queue
4614  * @q_idx: TX queue number
4615  * @vsi: Pointer to VSI struct
4616  *
4617  * This function checks specified queue for given VSI. Detects hung condition.
4618  * Sets hung bit since it is two step process. Before next run of service task
4619  * if napi_poll runs, it reset 'hung' bit for respective q_vector. If not,
4620  * hung condition remain unchanged and during subsequent run, this function
4621  * issues SW interrupt to recover from hung condition.
4622  **/
4623 static void i40e_detect_recover_hung_queue(int q_idx, struct i40e_vsi *vsi)
4624 {
4625         struct i40e_ring *tx_ring = NULL;
4626         struct i40e_pf  *pf;
4627         u32 head, val, tx_pending_hw;
4628         int i;
4629
4630         pf = vsi->back;
4631
4632         /* now that we have an index, find the tx_ring struct */
4633         for (i = 0; i < vsi->num_queue_pairs; i++) {
4634                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc) {
4635                         if (q_idx == vsi->tx_rings[i]->queue_index) {
4636                                 tx_ring = vsi->tx_rings[i];
4637                                 break;
4638                         }
4639                 }
4640         }
4641
4642         if (!tx_ring)
4643                 return;
4644
4645         /* Read interrupt register */
4646         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4647                 val = rd32(&pf->hw,
4648                            I40E_PFINT_DYN_CTLN(tx_ring->q_vector->v_idx +
4649                                                tx_ring->vsi->base_vector - 1));
4650         else
4651                 val = rd32(&pf->hw, I40E_PFINT_DYN_CTL0);
4652
4653         head = i40e_get_head(tx_ring);
4654
4655         tx_pending_hw = i40e_get_tx_pending(tx_ring, false);
4656
4657         /* HW is done executing descriptors, updated HEAD write back,
4658          * but SW hasn't processed those descriptors. If interrupt is
4659          * not generated from this point ON, it could result into
4660          * dev_watchdog detecting timeout on those netdev_queue,
4661          * hence proactively trigger SW interrupt.
4662          */
4663         if (tx_pending_hw && (!(val & I40E_PFINT_DYN_CTLN_INTENA_MASK))) {
4664                 /* NAPI Poll didn't run and clear since it was set */
4665                 if (test_and_clear_bit(I40E_Q_VECTOR_HUNG_DETECT,
4666                                        &tx_ring->q_vector->hung_detected)) {
4667                         netdev_info(vsi->netdev, "VSI_seid %d, Hung TX queue %d, tx_pending_hw: %d, NTC:0x%x, HWB: 0x%x, NTU: 0x%x, TAIL: 0x%x\n",
4668                                     vsi->seid, q_idx, tx_pending_hw,
4669                                     tx_ring->next_to_clean, head,
4670                                     tx_ring->next_to_use,
4671                                     readl(tx_ring->tail));
4672                         netdev_info(vsi->netdev, "VSI_seid %d, Issuing force_wb for TX queue %d, Interrupt Reg: 0x%x\n",
4673                                     vsi->seid, q_idx, val);
4674                         i40e_force_wb(vsi, tx_ring->q_vector);
4675                 } else {
4676                         /* First Chance - detected possible hung */
4677                         set_bit(I40E_Q_VECTOR_HUNG_DETECT,
4678                                 &tx_ring->q_vector->hung_detected);
4679                 }
4680         }
4681
4682         /* This is the case where we have interrupts missing,
4683          * so the tx_pending in HW will most likely be 0, but we
4684          * will have tx_pending in SW since the WB happened but the
4685          * interrupt got lost.
4686          */
4687         if ((!tx_pending_hw) && i40e_get_tx_pending(tx_ring, true) &&
4688             (!(val & I40E_PFINT_DYN_CTLN_INTENA_MASK))) {
4689                 local_bh_disable();
4690                 if (napi_reschedule(&tx_ring->q_vector->napi))
4691                         tx_ring->tx_stats.tx_lost_interrupt++;
4692                 local_bh_enable();
4693         }
4694 }
4695
4696 /**
4697  * i40e_detect_recover_hung - Function to detect and recover hung_queues
4698  * @pf:  pointer to PF struct
4699  *
4700  * LAN VSI has netdev and netdev has TX queues. This function is to check
4701  * each of those TX queues if they are hung, trigger recovery by issuing
4702  * SW interrupt.
4703  **/
4704 static void i40e_detect_recover_hung(struct i40e_pf *pf)
4705 {
4706         struct net_device *netdev;
4707         struct i40e_vsi *vsi;
4708         int i;
4709
4710         /* Only for LAN VSI */
4711         vsi = pf->vsi[pf->lan_vsi];
4712
4713         if (!vsi)
4714                 return;
4715
4716         /* Make sure, VSI state is not DOWN/RECOVERY_PENDING */
4717         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
4718             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
4719                 return;
4720
4721         /* Make sure type is MAIN VSI */
4722         if (vsi->type != I40E_VSI_MAIN)
4723                 return;
4724
4725         netdev = vsi->netdev;
4726         if (!netdev)
4727                 return;
4728
4729         /* Bail out if netif_carrier is not OK */
4730         if (!netif_carrier_ok(netdev))
4731                 return;
4732
4733         /* Go thru' TX queues for netdev */
4734         for (i = 0; i < netdev->num_tx_queues; i++) {
4735                 struct netdev_queue *q;
4736
4737                 q = netdev_get_tx_queue(netdev, i);
4738                 if (q)
4739                         i40e_detect_recover_hung_queue(i, vsi);
4740         }
4741 }
4742
4743 /**
4744  * i40e_get_iscsi_tc_map - Return TC map for iSCSI APP
4745  * @pf: pointer to PF
4746  *
4747  * Get TC map for ISCSI PF type that will include iSCSI TC
4748  * and LAN TC.
4749  **/
4750 static u8 i40e_get_iscsi_tc_map(struct i40e_pf *pf)
4751 {
4752         struct i40e_dcb_app_priority_table app;
4753         struct i40e_hw *hw = &pf->hw;
4754         u8 enabled_tc = 1; /* TC0 is always enabled */
4755         u8 tc, i;
4756         /* Get the iSCSI APP TLV */
4757         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4758
4759         for (i = 0; i < dcbcfg->numapps; i++) {
4760                 app = dcbcfg->app[i];
4761                 if (app.selector == I40E_APP_SEL_TCPIP &&
4762                     app.protocolid == I40E_APP_PROTOID_ISCSI) {
4763                         tc = dcbcfg->etscfg.prioritytable[app.priority];
4764                         enabled_tc |= BIT(tc);
4765                         break;
4766                 }
4767         }
4768
4769         return enabled_tc;
4770 }
4771
4772 /**
4773  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
4774  * @dcbcfg: the corresponding DCBx configuration structure
4775  *
4776  * Return the number of TCs from given DCBx configuration
4777  **/
4778 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
4779 {
4780         int i, tc_unused = 0;
4781         u8 num_tc = 0;
4782         u8 ret = 0;
4783
4784         /* Scan the ETS Config Priority Table to find
4785          * traffic class enabled for a given priority
4786          * and create a bitmask of enabled TCs
4787          */
4788         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++)
4789                 num_tc |= BIT(dcbcfg->etscfg.prioritytable[i]);
4790
4791         /* Now scan the bitmask to check for
4792          * contiguous TCs starting with TC0
4793          */
4794         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4795                 if (num_tc & BIT(i)) {
4796                         if (!tc_unused) {
4797                                 ret++;
4798                         } else {
4799                                 pr_err("Non-contiguous TC - Disabling DCB\n");
4800                                 return 1;
4801                         }
4802                 } else {
4803                         tc_unused = 1;
4804                 }
4805         }
4806
4807         /* There is always at least TC0 */
4808         if (!ret)
4809                 ret = 1;
4810
4811         return ret;
4812 }
4813
4814 /**
4815  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
4816  * @dcbcfg: the corresponding DCBx configuration structure
4817  *
4818  * Query the current DCB configuration and return the number of
4819  * traffic classes enabled from the given DCBX config
4820  **/
4821 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
4822 {
4823         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
4824         u8 enabled_tc = 1;
4825         u8 i;
4826
4827         for (i = 0; i < num_tc; i++)
4828                 enabled_tc |= BIT(i);
4829
4830         return enabled_tc;
4831 }
4832
4833 /**
4834  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
4835  * @pf: PF being queried
4836  *
4837  * Return number of traffic classes enabled for the given PF
4838  **/
4839 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
4840 {
4841         struct i40e_hw *hw = &pf->hw;
4842         u8 i, enabled_tc = 1;
4843         u8 num_tc = 0;
4844         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4845
4846         /* If DCB is not enabled then always in single TC */
4847         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
4848                 return 1;
4849
4850         /* SFP mode will be enabled for all TCs on port */
4851         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
4852                 return i40e_dcb_get_num_tc(dcbcfg);
4853
4854         /* MFP mode return count of enabled TCs for this PF */
4855         if (pf->hw.func_caps.iscsi)
4856                 enabled_tc =  i40e_get_iscsi_tc_map(pf);
4857         else
4858                 return 1; /* Only TC0 */
4859
4860         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4861                 if (enabled_tc & BIT(i))
4862                         num_tc++;
4863         }
4864         return num_tc;
4865 }
4866
4867 /**
4868  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
4869  * @pf: PF being queried
4870  *
4871  * Return a bitmap for enabled traffic classes for this PF.
4872  **/
4873 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
4874 {
4875         /* If DCB is not enabled for this PF then just return default TC */
4876         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
4877                 return I40E_DEFAULT_TRAFFIC_CLASS;
4878
4879         /* SFP mode we want PF to be enabled for all TCs */
4880         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
4881                 return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
4882
4883         /* MFP enabled and iSCSI PF type */
4884         if (pf->hw.func_caps.iscsi)
4885                 return i40e_get_iscsi_tc_map(pf);
4886         else
4887                 return I40E_DEFAULT_TRAFFIC_CLASS;
4888 }
4889
4890 /**
4891  * i40e_vsi_get_bw_info - Query VSI BW Information
4892  * @vsi: the VSI being queried
4893  *
4894  * Returns 0 on success, negative value on failure
4895  **/
4896 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
4897 {
4898         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
4899         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
4900         struct i40e_pf *pf = vsi->back;
4901         struct i40e_hw *hw = &pf->hw;
4902         i40e_status ret;
4903         u32 tc_bw_max;
4904         int i;
4905
4906         /* Get the VSI level BW configuration */
4907         ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
4908         if (ret) {
4909                 dev_info(&pf->pdev->dev,
4910                          "couldn't get PF vsi bw config, err %s aq_err %s\n",
4911                          i40e_stat_str(&pf->hw, ret),
4912                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4913                 return -EINVAL;
4914         }
4915
4916         /* Get the VSI level BW configuration per TC */
4917         ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
4918                                                NULL);
4919         if (ret) {
4920                 dev_info(&pf->pdev->dev,
4921                          "couldn't get PF vsi ets bw config, err %s aq_err %s\n",
4922                          i40e_stat_str(&pf->hw, ret),
4923                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
4924                 return -EINVAL;
4925         }
4926
4927         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
4928                 dev_info(&pf->pdev->dev,
4929                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
4930                          bw_config.tc_valid_bits,
4931                          bw_ets_config.tc_valid_bits);
4932                 /* Still continuing */
4933         }
4934
4935         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
4936         vsi->bw_max_quanta = bw_config.max_bw;
4937         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
4938                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
4939         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
4940                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
4941                 vsi->bw_ets_limit_credits[i] =
4942                                         le16_to_cpu(bw_ets_config.credits[i]);
4943                 /* 3 bits out of 4 for each TC */
4944                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
4945         }
4946
4947         return 0;
4948 }
4949
4950 /**
4951  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
4952  * @vsi: the VSI being configured
4953  * @enabled_tc: TC bitmap
4954  * @bw_credits: BW shared credits per TC
4955  *
4956  * Returns 0 on success, negative value on failure
4957  **/
4958 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
4959                                        u8 *bw_share)
4960 {
4961         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
4962         i40e_status ret;
4963         int i;
4964
4965         bw_data.tc_valid_bits = enabled_tc;
4966         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
4967                 bw_data.tc_bw_credits[i] = bw_share[i];
4968
4969         ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
4970                                        NULL);
4971         if (ret) {
4972                 dev_info(&vsi->back->pdev->dev,
4973                          "AQ command Config VSI BW allocation per TC failed = %d\n",
4974                          vsi->back->hw.aq.asq_last_status);
4975                 return -EINVAL;
4976         }
4977
4978         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
4979                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
4980
4981         return 0;
4982 }
4983
4984 /**
4985  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
4986  * @vsi: the VSI being configured
4987  * @enabled_tc: TC map to be enabled
4988  *
4989  **/
4990 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
4991 {
4992         struct net_device *netdev = vsi->netdev;
4993         struct i40e_pf *pf = vsi->back;
4994         struct i40e_hw *hw = &pf->hw;
4995         u8 netdev_tc = 0;
4996         int i;
4997         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
4998
4999         if (!netdev)
5000                 return;
5001
5002         if (!enabled_tc) {
5003                 netdev_reset_tc(netdev);
5004                 return;
5005         }
5006
5007         /* Set up actual enabled TCs on the VSI */
5008         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
5009                 return;
5010
5011         /* set per TC queues for the VSI */
5012         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
5013                 /* Only set TC queues for enabled tcs
5014                  *
5015                  * e.g. For a VSI that has TC0 and TC3 enabled the
5016                  * enabled_tc bitmap would be 0x00001001; the driver
5017                  * will set the numtc for netdev as 2 that will be
5018                  * referenced by the netdev layer as TC 0 and 1.
5019                  */
5020                 if (vsi->tc_config.enabled_tc & BIT(i))
5021                         netdev_set_tc_queue(netdev,
5022                                         vsi->tc_config.tc_info[i].netdev_tc,
5023                                         vsi->tc_config.tc_info[i].qcount,
5024                                         vsi->tc_config.tc_info[i].qoffset);
5025         }
5026
5027         /* Assign UP2TC map for the VSI */
5028         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
5029                 /* Get the actual TC# for the UP */
5030                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
5031                 /* Get the mapped netdev TC# for the UP */
5032                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
5033                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
5034         }
5035 }
5036
5037 /**
5038  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
5039  * @vsi: the VSI being configured
5040  * @ctxt: the ctxt buffer returned from AQ VSI update param command
5041  **/
5042 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
5043                                       struct i40e_vsi_context *ctxt)
5044 {
5045         /* copy just the sections touched not the entire info
5046          * since not all sections are valid as returned by
5047          * update vsi params
5048          */
5049         vsi->info.mapping_flags = ctxt->info.mapping_flags;
5050         memcpy(&vsi->info.queue_mapping,
5051                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
5052         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
5053                sizeof(vsi->info.tc_mapping));
5054 }
5055
5056 /**
5057  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
5058  * @vsi: VSI to be configured
5059  * @enabled_tc: TC bitmap
5060  *
5061  * This configures a particular VSI for TCs that are mapped to the
5062  * given TC bitmap. It uses default bandwidth share for TCs across
5063  * VSIs to configure TC for a particular VSI.
5064  *
5065  * NOTE:
5066  * It is expected that the VSI queues have been quisced before calling
5067  * this function.
5068  **/
5069 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
5070 {
5071         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
5072         struct i40e_vsi_context ctxt;
5073         int ret = 0;
5074         int i;
5075
5076         /* Check if enabled_tc is same as existing or new TCs */
5077         if (vsi->tc_config.enabled_tc == enabled_tc)
5078                 return ret;
5079
5080         /* Enable ETS TCs with equal BW Share for now across all VSIs */
5081         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
5082                 if (enabled_tc & BIT(i))
5083                         bw_share[i] = 1;
5084         }
5085
5086         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
5087         if (ret) {
5088                 dev_info(&vsi->back->pdev->dev,
5089                          "Failed configuring TC map %d for VSI %d\n",
5090                          enabled_tc, vsi->seid);
5091                 goto out;
5092         }
5093
5094         /* Update Queue Pairs Mapping for currently enabled UPs */
5095         ctxt.seid = vsi->seid;
5096         ctxt.pf_num = vsi->back->hw.pf_id;
5097         ctxt.vf_num = 0;
5098         ctxt.uplink_seid = vsi->uplink_seid;
5099         ctxt.info = vsi->info;
5100         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
5101
5102         if (vsi->back->flags & I40E_FLAG_IWARP_ENABLED) {
5103                 ctxt.info.valid_sections |=
5104                                 cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
5105                 ctxt.info.queueing_opt_flags |= I40E_AQ_VSI_QUE_OPT_TCP_ENA;
5106         }
5107
5108         /* Update the VSI after updating the VSI queue-mapping information */
5109         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
5110         if (ret) {
5111                 dev_info(&vsi->back->pdev->dev,
5112                          "Update vsi tc config failed, err %s aq_err %s\n",
5113                          i40e_stat_str(&vsi->back->hw, ret),
5114                          i40e_aq_str(&vsi->back->hw,
5115                                      vsi->back->hw.aq.asq_last_status));
5116                 goto out;
5117         }
5118         /* update the local VSI info with updated queue map */
5119         i40e_vsi_update_queue_map(vsi, &ctxt);
5120         vsi->info.valid_sections = 0;
5121
5122         /* Update current VSI BW information */
5123         ret = i40e_vsi_get_bw_info(vsi);
5124         if (ret) {
5125                 dev_info(&vsi->back->pdev->dev,
5126                          "Failed updating vsi bw info, err %s aq_err %s\n",
5127                          i40e_stat_str(&vsi->back->hw, ret),
5128                          i40e_aq_str(&vsi->back->hw,
5129                                      vsi->back->hw.aq.asq_last_status));
5130                 goto out;
5131         }
5132
5133         /* Update the netdev TC setup */
5134         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
5135 out:
5136         return ret;
5137 }
5138
5139 /**
5140  * i40e_veb_config_tc - Configure TCs for given VEB
5141  * @veb: given VEB
5142  * @enabled_tc: TC bitmap
5143  *
5144  * Configures given TC bitmap for VEB (switching) element
5145  **/
5146 int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
5147 {
5148         struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
5149         struct i40e_pf *pf = veb->pf;
5150         int ret = 0;
5151         int i;
5152
5153         /* No TCs or already enabled TCs just return */
5154         if (!enabled_tc || veb->enabled_tc == enabled_tc)
5155                 return ret;
5156
5157         bw_data.tc_valid_bits = enabled_tc;
5158         /* bw_data.absolute_credits is not set (relative) */
5159
5160         /* Enable ETS TCs with equal BW Share for now */
5161         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
5162                 if (enabled_tc & BIT(i))
5163                         bw_data.tc_bw_share_credits[i] = 1;
5164         }
5165
5166         ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
5167                                                    &bw_data, NULL);
5168         if (ret) {
5169                 dev_info(&pf->pdev->dev,
5170                          "VEB bw config failed, err %s aq_err %s\n",
5171                          i40e_stat_str(&pf->hw, ret),
5172                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5173                 goto out;
5174         }
5175
5176         /* Update the BW information */
5177         ret = i40e_veb_get_bw_info(veb);
5178         if (ret) {
5179                 dev_info(&pf->pdev->dev,
5180                          "Failed getting veb bw config, err %s aq_err %s\n",
5181                          i40e_stat_str(&pf->hw, ret),
5182                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5183         }
5184
5185 out:
5186         return ret;
5187 }
5188
5189 #ifdef CONFIG_I40E_DCB
5190 /**
5191  * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
5192  * @pf: PF struct
5193  *
5194  * Reconfigure VEB/VSIs on a given PF; it is assumed that
5195  * the caller would've quiesce all the VSIs before calling
5196  * this function
5197  **/
5198 static void i40e_dcb_reconfigure(struct i40e_pf *pf)
5199 {
5200         u8 tc_map = 0;
5201         int ret;
5202         u8 v;
5203
5204         /* Enable the TCs available on PF to all VEBs */
5205         tc_map = i40e_pf_get_tc_map(pf);
5206         for (v = 0; v < I40E_MAX_VEB; v++) {
5207                 if (!pf->veb[v])
5208                         continue;
5209                 ret = i40e_veb_config_tc(pf->veb[v], tc_map);
5210                 if (ret) {
5211                         dev_info(&pf->pdev->dev,
5212                                  "Failed configuring TC for VEB seid=%d\n",
5213                                  pf->veb[v]->seid);
5214                         /* Will try to configure as many components */
5215                 }
5216         }
5217
5218         /* Update each VSI */
5219         for (v = 0; v < pf->num_alloc_vsi; v++) {
5220                 if (!pf->vsi[v])
5221                         continue;
5222
5223                 /* - Enable all TCs for the LAN VSI
5224 #ifdef I40E_FCOE
5225                  * - For FCoE VSI only enable the TC configured
5226                  *   as per the APP TLV
5227 #endif
5228                  * - For all others keep them at TC0 for now
5229                  */
5230                 if (v == pf->lan_vsi)
5231                         tc_map = i40e_pf_get_tc_map(pf);
5232                 else
5233                         tc_map = I40E_DEFAULT_TRAFFIC_CLASS;
5234 #ifdef I40E_FCOE
5235                 if (pf->vsi[v]->type == I40E_VSI_FCOE)
5236                         tc_map = i40e_get_fcoe_tc_map(pf);
5237 #endif /* #ifdef I40E_FCOE */
5238
5239                 ret = i40e_vsi_config_tc(pf->vsi[v], tc_map);
5240                 if (ret) {
5241                         dev_info(&pf->pdev->dev,
5242                                  "Failed configuring TC for VSI seid=%d\n",
5243                                  pf->vsi[v]->seid);
5244                         /* Will try to configure as many components */
5245                 } else {
5246                         /* Re-configure VSI vectors based on updated TC map */
5247                         i40e_vsi_map_rings_to_vectors(pf->vsi[v]);
5248                         if (pf->vsi[v]->netdev)
5249                                 i40e_dcbnl_set_all(pf->vsi[v]);
5250                 }
5251         }
5252 }
5253
5254 /**
5255  * i40e_resume_port_tx - Resume port Tx
5256  * @pf: PF struct
5257  *
5258  * Resume a port's Tx and issue a PF reset in case of failure to
5259  * resume.
5260  **/
5261 static int i40e_resume_port_tx(struct i40e_pf *pf)
5262 {
5263         struct i40e_hw *hw = &pf->hw;
5264         int ret;
5265
5266         ret = i40e_aq_resume_port_tx(hw, NULL);
5267         if (ret) {
5268                 dev_info(&pf->pdev->dev,
5269                          "Resume Port Tx failed, err %s aq_err %s\n",
5270                           i40e_stat_str(&pf->hw, ret),
5271                           i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5272                 /* Schedule PF reset to recover */
5273                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
5274                 i40e_service_event_schedule(pf);
5275         }
5276
5277         return ret;
5278 }
5279
5280 /**
5281  * i40e_init_pf_dcb - Initialize DCB configuration
5282  * @pf: PF being configured
5283  *
5284  * Query the current DCB configuration and cache it
5285  * in the hardware structure
5286  **/
5287 static int i40e_init_pf_dcb(struct i40e_pf *pf)
5288 {
5289         struct i40e_hw *hw = &pf->hw;
5290         int err = 0;
5291
5292         /* Do not enable DCB for SW1 and SW2 images even if the FW is capable */
5293         if (pf->flags & I40E_FLAG_NO_DCB_SUPPORT)
5294                 goto out;
5295
5296         /* Get the initial DCB configuration */
5297         err = i40e_init_dcb(hw);
5298         if (!err) {
5299                 /* Device/Function is not DCBX capable */
5300                 if ((!hw->func_caps.dcb) ||
5301                     (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
5302                         dev_info(&pf->pdev->dev,
5303                                  "DCBX offload is not supported or is disabled for this PF.\n");
5304
5305                         if (pf->flags & I40E_FLAG_MFP_ENABLED)
5306                                 goto out;
5307
5308                 } else {
5309                         /* When status is not DISABLED then DCBX in FW */
5310                         pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
5311                                        DCB_CAP_DCBX_VER_IEEE;
5312
5313                         pf->flags |= I40E_FLAG_DCB_CAPABLE;
5314                         /* Enable DCB tagging only when more than one TC
5315                          * or explicitly disable if only one TC
5316                          */
5317                         if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
5318                                 pf->flags |= I40E_FLAG_DCB_ENABLED;
5319                         else
5320                                 pf->flags &= ~I40E_FLAG_DCB_ENABLED;
5321                         dev_dbg(&pf->pdev->dev,
5322                                 "DCBX offload is supported for this PF.\n");
5323                 }
5324         } else {
5325                 dev_info(&pf->pdev->dev,
5326                          "Query for DCB configuration failed, err %s aq_err %s\n",
5327                          i40e_stat_str(&pf->hw, err),
5328                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5329         }
5330
5331 out:
5332         return err;
5333 }
5334 #endif /* CONFIG_I40E_DCB */
5335 #define SPEED_SIZE 14
5336 #define FC_SIZE 8
5337 /**
5338  * i40e_print_link_message - print link up or down
5339  * @vsi: the VSI for which link needs a message
5340  */
5341 void i40e_print_link_message(struct i40e_vsi *vsi, bool isup)
5342 {
5343         enum i40e_aq_link_speed new_speed;
5344         char *speed = "Unknown";
5345         char *fc = "Unknown";
5346         char *fec = "";
5347         char *an = "";
5348
5349         new_speed = vsi->back->hw.phy.link_info.link_speed;
5350
5351         if ((vsi->current_isup == isup) && (vsi->current_speed == new_speed))
5352                 return;
5353         vsi->current_isup = isup;
5354         vsi->current_speed = new_speed;
5355         if (!isup) {
5356                 netdev_info(vsi->netdev, "NIC Link is Down\n");
5357                 return;
5358         }
5359
5360         /* Warn user if link speed on NPAR enabled partition is not at
5361          * least 10GB
5362          */
5363         if (vsi->back->hw.func_caps.npar_enable &&
5364             (vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_1GB ||
5365              vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_100MB))
5366                 netdev_warn(vsi->netdev,
5367                             "The partition detected link speed that is less than 10Gbps\n");
5368
5369         switch (vsi->back->hw.phy.link_info.link_speed) {
5370         case I40E_LINK_SPEED_40GB:
5371                 speed = "40 G";
5372                 break;
5373         case I40E_LINK_SPEED_20GB:
5374                 speed = "20 G";
5375                 break;
5376         case I40E_LINK_SPEED_25GB:
5377                 speed = "25 G";
5378                 break;
5379         case I40E_LINK_SPEED_10GB:
5380                 speed = "10 G";
5381                 break;
5382         case I40E_LINK_SPEED_1GB:
5383                 speed = "1000 M";
5384                 break;
5385         case I40E_LINK_SPEED_100MB:
5386                 speed = "100 M";
5387                 break;
5388         default:
5389                 break;
5390         }
5391
5392         switch (vsi->back->hw.fc.current_mode) {
5393         case I40E_FC_FULL:
5394                 fc = "RX/TX";
5395                 break;
5396         case I40E_FC_TX_PAUSE:
5397                 fc = "TX";
5398                 break;
5399         case I40E_FC_RX_PAUSE:
5400                 fc = "RX";
5401                 break;
5402         default:
5403                 fc = "None";
5404                 break;
5405         }
5406
5407         if (vsi->back->hw.phy.link_info.link_speed == I40E_LINK_SPEED_25GB) {
5408                 fec = ", FEC: None";
5409                 an = ", Autoneg: False";
5410
5411                 if (vsi->back->hw.phy.link_info.an_info & I40E_AQ_AN_COMPLETED)
5412                         an = ", Autoneg: True";
5413
5414                 if (vsi->back->hw.phy.link_info.fec_info &
5415                     I40E_AQ_CONFIG_FEC_KR_ENA)
5416                         fec = ", FEC: CL74 FC-FEC/BASE-R";
5417                 else if (vsi->back->hw.phy.link_info.fec_info &
5418                          I40E_AQ_CONFIG_FEC_RS_ENA)
5419                         fec = ", FEC: CL108 RS-FEC";
5420         }
5421
5422         netdev_info(vsi->netdev, "NIC Link is Up, %sbps Full Duplex%s%s, Flow Control: %s\n",
5423                     speed, fec, an, fc);
5424 }
5425
5426 /**
5427  * i40e_up_complete - Finish the last steps of bringing up a connection
5428  * @vsi: the VSI being configured
5429  **/
5430 static int i40e_up_complete(struct i40e_vsi *vsi)
5431 {
5432         struct i40e_pf *pf = vsi->back;
5433         int err;
5434
5435         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5436                 i40e_vsi_configure_msix(vsi);
5437         else
5438                 i40e_configure_msi_and_legacy(vsi);
5439
5440         /* start rings */
5441         err = i40e_vsi_start_rings(vsi);
5442         if (err)
5443                 return err;
5444
5445         clear_bit(__I40E_DOWN, &vsi->state);
5446         i40e_napi_enable_all(vsi);
5447         i40e_vsi_enable_irq(vsi);
5448
5449         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
5450             (vsi->netdev)) {
5451                 i40e_print_link_message(vsi, true);
5452                 netif_tx_start_all_queues(vsi->netdev);
5453                 netif_carrier_on(vsi->netdev);
5454         } else if (vsi->netdev) {
5455                 i40e_print_link_message(vsi, false);
5456                 /* need to check for qualified module here*/
5457                 if ((pf->hw.phy.link_info.link_info &
5458                         I40E_AQ_MEDIA_AVAILABLE) &&
5459                     (!(pf->hw.phy.link_info.an_info &
5460                         I40E_AQ_QUALIFIED_MODULE)))
5461                         netdev_err(vsi->netdev,
5462                                    "the driver failed to link because an unqualified module was detected.");
5463         }
5464
5465         /* replay FDIR SB filters */
5466         if (vsi->type == I40E_VSI_FDIR) {
5467                 /* reset fd counters */
5468                 pf->fd_add_err = pf->fd_atr_cnt = 0;
5469                 i40e_fdir_filter_restore(vsi);
5470         }
5471
5472         /* On the next run of the service_task, notify any clients of the new
5473          * opened netdev
5474          */
5475         pf->flags |= I40E_FLAG_SERVICE_CLIENT_REQUESTED;
5476         i40e_service_event_schedule(pf);
5477
5478         return 0;
5479 }
5480
5481 /**
5482  * i40e_vsi_reinit_locked - Reset the VSI
5483  * @vsi: the VSI being configured
5484  *
5485  * Rebuild the ring structs after some configuration
5486  * has changed, e.g. MTU size.
5487  **/
5488 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
5489 {
5490         struct i40e_pf *pf = vsi->back;
5491
5492         WARN_ON(in_interrupt());
5493         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
5494                 usleep_range(1000, 2000);
5495         i40e_down(vsi);
5496
5497         i40e_up(vsi);
5498         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
5499 }
5500
5501 /**
5502  * i40e_up - Bring the connection back up after being down
5503  * @vsi: the VSI being configured
5504  **/
5505 int i40e_up(struct i40e_vsi *vsi)
5506 {
5507         int err;
5508
5509         err = i40e_vsi_configure(vsi);
5510         if (!err)
5511                 err = i40e_up_complete(vsi);
5512
5513         return err;
5514 }
5515
5516 /**
5517  * i40e_down - Shutdown the connection processing
5518  * @vsi: the VSI being stopped
5519  **/
5520 void i40e_down(struct i40e_vsi *vsi)
5521 {
5522         int i;
5523
5524         /* It is assumed that the caller of this function
5525          * sets the vsi->state __I40E_DOWN bit.
5526          */
5527         if (vsi->netdev) {
5528                 netif_carrier_off(vsi->netdev);
5529                 netif_tx_disable(vsi->netdev);
5530         }
5531         i40e_vsi_disable_irq(vsi);
5532         i40e_vsi_stop_rings(vsi);
5533         i40e_napi_disable_all(vsi);
5534
5535         for (i = 0; i < vsi->num_queue_pairs; i++) {
5536                 i40e_clean_tx_ring(vsi->tx_rings[i]);
5537                 i40e_clean_rx_ring(vsi->rx_rings[i]);
5538         }
5539
5540 }
5541
5542 /**
5543  * i40e_setup_tc - configure multiple traffic classes
5544  * @netdev: net device to configure
5545  * @tc: number of traffic classes to enable
5546  **/
5547 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
5548 {
5549         struct i40e_netdev_priv *np = netdev_priv(netdev);
5550         struct i40e_vsi *vsi = np->vsi;
5551         struct i40e_pf *pf = vsi->back;
5552         u8 enabled_tc = 0;
5553         int ret = -EINVAL;
5554         int i;
5555
5556         /* Check if DCB enabled to continue */
5557         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
5558                 netdev_info(netdev, "DCB is not enabled for adapter\n");
5559                 goto exit;
5560         }
5561
5562         /* Check if MFP enabled */
5563         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
5564                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
5565                 goto exit;
5566         }
5567
5568         /* Check whether tc count is within enabled limit */
5569         if (tc > i40e_pf_get_num_tc(pf)) {
5570                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
5571                 goto exit;
5572         }
5573
5574         /* Generate TC map for number of tc requested */
5575         for (i = 0; i < tc; i++)
5576                 enabled_tc |= BIT(i);
5577
5578         /* Requesting same TC configuration as already enabled */
5579         if (enabled_tc == vsi->tc_config.enabled_tc)
5580                 return 0;
5581
5582         /* Quiesce VSI queues */
5583         i40e_quiesce_vsi(vsi);
5584
5585         /* Configure VSI for enabled TCs */
5586         ret = i40e_vsi_config_tc(vsi, enabled_tc);
5587         if (ret) {
5588                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
5589                             vsi->seid);
5590                 goto exit;
5591         }
5592
5593         /* Unquiesce VSI */
5594         i40e_unquiesce_vsi(vsi);
5595
5596 exit:
5597         return ret;
5598 }
5599
5600 #ifdef I40E_FCOE
5601 int __i40e_setup_tc(struct net_device *netdev, u32 handle, __be16 proto,
5602                     struct tc_to_netdev *tc)
5603 #else
5604 static int __i40e_setup_tc(struct net_device *netdev, u32 handle, __be16 proto,
5605                            struct tc_to_netdev *tc)
5606 #endif
5607 {
5608         if (tc->type != TC_SETUP_MQPRIO)
5609                 return -EINVAL;
5610
5611         tc->mqprio->hw = TC_MQPRIO_HW_OFFLOAD_TCS;
5612
5613         return i40e_setup_tc(netdev, tc->mqprio->num_tc);
5614 }
5615
5616 /**
5617  * i40e_open - Called when a network interface is made active
5618  * @netdev: network interface device structure
5619  *
5620  * The open entry point is called when a network interface is made
5621  * active by the system (IFF_UP).  At this point all resources needed
5622  * for transmit and receive operations are allocated, the interrupt
5623  * handler is registered with the OS, the netdev watchdog subtask is
5624  * enabled, and the stack is notified that the interface is ready.
5625  *
5626  * Returns 0 on success, negative value on failure
5627  **/
5628 int i40e_open(struct net_device *netdev)
5629 {
5630         struct i40e_netdev_priv *np = netdev_priv(netdev);
5631         struct i40e_vsi *vsi = np->vsi;
5632         struct i40e_pf *pf = vsi->back;
5633         int err;
5634
5635         /* disallow open during test or if eeprom is broken */
5636         if (test_bit(__I40E_TESTING, &pf->state) ||
5637             test_bit(__I40E_BAD_EEPROM, &pf->state))
5638                 return -EBUSY;
5639
5640         netif_carrier_off(netdev);
5641
5642         err = i40e_vsi_open(vsi);
5643         if (err)
5644                 return err;
5645
5646         /* configure global TSO hardware offload settings */
5647         wr32(&pf->hw, I40E_GLLAN_TSOMSK_F, be32_to_cpu(TCP_FLAG_PSH |
5648                                                        TCP_FLAG_FIN) >> 16);
5649         wr32(&pf->hw, I40E_GLLAN_TSOMSK_M, be32_to_cpu(TCP_FLAG_PSH |
5650                                                        TCP_FLAG_FIN |
5651                                                        TCP_FLAG_CWR) >> 16);
5652         wr32(&pf->hw, I40E_GLLAN_TSOMSK_L, be32_to_cpu(TCP_FLAG_CWR) >> 16);
5653
5654         udp_tunnel_get_rx_info(netdev);
5655
5656         return 0;
5657 }
5658
5659 /**
5660  * i40e_vsi_open -
5661  * @vsi: the VSI to open
5662  *
5663  * Finish initialization of the VSI.
5664  *
5665  * Returns 0 on success, negative value on failure
5666  **/
5667 int i40e_vsi_open(struct i40e_vsi *vsi)
5668 {
5669         struct i40e_pf *pf = vsi->back;
5670         char int_name[I40E_INT_NAME_STR_LEN];
5671         int err;
5672
5673         /* allocate descriptors */
5674         err = i40e_vsi_setup_tx_resources(vsi);
5675         if (err)
5676                 goto err_setup_tx;
5677         err = i40e_vsi_setup_rx_resources(vsi);
5678         if (err)
5679                 goto err_setup_rx;
5680
5681         err = i40e_vsi_configure(vsi);
5682         if (err)
5683                 goto err_setup_rx;
5684
5685         if (vsi->netdev) {
5686                 snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
5687                          dev_driver_string(&pf->pdev->dev), vsi->netdev->name);
5688                 err = i40e_vsi_request_irq(vsi, int_name);
5689                 if (err)
5690                         goto err_setup_rx;
5691
5692                 /* Notify the stack of the actual queue counts. */
5693                 err = netif_set_real_num_tx_queues(vsi->netdev,
5694                                                    vsi->num_queue_pairs);
5695                 if (err)
5696                         goto err_set_queues;
5697
5698                 err = netif_set_real_num_rx_queues(vsi->netdev,
5699                                                    vsi->num_queue_pairs);
5700                 if (err)
5701                         goto err_set_queues;
5702
5703         } else if (vsi->type == I40E_VSI_FDIR) {
5704                 snprintf(int_name, sizeof(int_name) - 1, "%s-%s:fdir",
5705                          dev_driver_string(&pf->pdev->dev),
5706                          dev_name(&pf->pdev->dev));
5707                 err = i40e_vsi_request_irq(vsi, int_name);
5708
5709         } else {
5710                 err = -EINVAL;
5711                 goto err_setup_rx;
5712         }
5713
5714         err = i40e_up_complete(vsi);
5715         if (err)
5716                 goto err_up_complete;
5717
5718         return 0;
5719
5720 err_up_complete:
5721         i40e_down(vsi);
5722 err_set_queues:
5723         i40e_vsi_free_irq(vsi);
5724 err_setup_rx:
5725         i40e_vsi_free_rx_resources(vsi);
5726 err_setup_tx:
5727         i40e_vsi_free_tx_resources(vsi);
5728         if (vsi == pf->vsi[pf->lan_vsi])
5729                 i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
5730
5731         return err;
5732 }
5733
5734 /**
5735  * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
5736  * @pf: Pointer to PF
5737  *
5738  * This function destroys the hlist where all the Flow Director
5739  * filters were saved.
5740  **/
5741 static void i40e_fdir_filter_exit(struct i40e_pf *pf)
5742 {
5743         struct i40e_fdir_filter *filter;
5744         struct hlist_node *node2;
5745
5746         hlist_for_each_entry_safe(filter, node2,
5747                                   &pf->fdir_filter_list, fdir_node) {
5748                 hlist_del(&filter->fdir_node);
5749                 kfree(filter);
5750         }
5751         pf->fdir_pf_active_filters = 0;
5752 }
5753
5754 /**
5755  * i40e_close - Disables a network interface
5756  * @netdev: network interface device structure
5757  *
5758  * The close entry point is called when an interface is de-activated
5759  * by the OS.  The hardware is still under the driver's control, but
5760  * this netdev interface is disabled.
5761  *
5762  * Returns 0, this is not allowed to fail
5763  **/
5764 int i40e_close(struct net_device *netdev)
5765 {
5766         struct i40e_netdev_priv *np = netdev_priv(netdev);
5767         struct i40e_vsi *vsi = np->vsi;
5768
5769         i40e_vsi_close(vsi);
5770
5771         return 0;
5772 }
5773
5774 /**
5775  * i40e_do_reset - Start a PF or Core Reset sequence
5776  * @pf: board private structure
5777  * @reset_flags: which reset is requested
5778  *
5779  * The essential difference in resets is that the PF Reset
5780  * doesn't clear the packet buffers, doesn't reset the PE
5781  * firmware, and doesn't bother the other PFs on the chip.
5782  **/
5783 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
5784 {
5785         u32 val;
5786
5787         WARN_ON(in_interrupt());
5788
5789
5790         /* do the biggest reset indicated */
5791         if (reset_flags & BIT_ULL(__I40E_GLOBAL_RESET_REQUESTED)) {
5792
5793                 /* Request a Global Reset
5794                  *
5795                  * This will start the chip's countdown to the actual full
5796                  * chip reset event, and a warning interrupt to be sent
5797                  * to all PFs, including the requestor.  Our handler
5798                  * for the warning interrupt will deal with the shutdown
5799                  * and recovery of the switch setup.
5800                  */
5801                 dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
5802                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
5803                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
5804                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
5805
5806         } else if (reset_flags & BIT_ULL(__I40E_CORE_RESET_REQUESTED)) {
5807
5808                 /* Request a Core Reset
5809                  *
5810                  * Same as Global Reset, except does *not* include the MAC/PHY
5811                  */
5812                 dev_dbg(&pf->pdev->dev, "CoreR requested\n");
5813                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
5814                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
5815                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
5816                 i40e_flush(&pf->hw);
5817
5818         } else if (reset_flags & BIT_ULL(__I40E_PF_RESET_REQUESTED)) {
5819
5820                 /* Request a PF Reset
5821                  *
5822                  * Resets only the PF-specific registers
5823                  *
5824                  * This goes directly to the tear-down and rebuild of
5825                  * the switch, since we need to do all the recovery as
5826                  * for the Core Reset.
5827                  */
5828                 dev_dbg(&pf->pdev->dev, "PFR requested\n");
5829                 i40e_handle_reset_warning(pf);
5830
5831         } else if (reset_flags & BIT_ULL(__I40E_REINIT_REQUESTED)) {
5832                 int v;
5833
5834                 /* Find the VSI(s) that requested a re-init */
5835                 dev_info(&pf->pdev->dev,
5836                          "VSI reinit requested\n");
5837                 for (v = 0; v < pf->num_alloc_vsi; v++) {
5838                         struct i40e_vsi *vsi = pf->vsi[v];
5839
5840                         if (vsi != NULL &&
5841                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
5842                                 i40e_vsi_reinit_locked(pf->vsi[v]);
5843                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
5844                         }
5845                 }
5846         } else if (reset_flags & BIT_ULL(__I40E_DOWN_REQUESTED)) {
5847                 int v;
5848
5849                 /* Find the VSI(s) that needs to be brought down */
5850                 dev_info(&pf->pdev->dev, "VSI down requested\n");
5851                 for (v = 0; v < pf->num_alloc_vsi; v++) {
5852                         struct i40e_vsi *vsi = pf->vsi[v];
5853
5854                         if (vsi != NULL &&
5855                             test_bit(__I40E_DOWN_REQUESTED, &vsi->state)) {
5856                                 set_bit(__I40E_DOWN, &vsi->state);
5857                                 i40e_down(vsi);
5858                                 clear_bit(__I40E_DOWN_REQUESTED, &vsi->state);
5859                         }
5860                 }
5861         } else {
5862                 dev_info(&pf->pdev->dev,
5863                          "bad reset request 0x%08x\n", reset_flags);
5864         }
5865 }
5866
5867 #ifdef CONFIG_I40E_DCB
5868 /**
5869  * i40e_dcb_need_reconfig - Check if DCB needs reconfig
5870  * @pf: board private structure
5871  * @old_cfg: current DCB config
5872  * @new_cfg: new DCB config
5873  **/
5874 bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
5875                             struct i40e_dcbx_config *old_cfg,
5876                             struct i40e_dcbx_config *new_cfg)
5877 {
5878         bool need_reconfig = false;
5879
5880         /* Check if ETS configuration has changed */
5881         if (memcmp(&new_cfg->etscfg,
5882                    &old_cfg->etscfg,
5883                    sizeof(new_cfg->etscfg))) {
5884                 /* If Priority Table has changed reconfig is needed */
5885                 if (memcmp(&new_cfg->etscfg.prioritytable,
5886                            &old_cfg->etscfg.prioritytable,
5887                            sizeof(new_cfg->etscfg.prioritytable))) {
5888                         need_reconfig = true;
5889                         dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
5890                 }
5891
5892                 if (memcmp(&new_cfg->etscfg.tcbwtable,
5893                            &old_cfg->etscfg.tcbwtable,
5894                            sizeof(new_cfg->etscfg.tcbwtable)))
5895                         dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");
5896
5897                 if (memcmp(&new_cfg->etscfg.tsatable,
5898                            &old_cfg->etscfg.tsatable,
5899                            sizeof(new_cfg->etscfg.tsatable)))
5900                         dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
5901         }
5902
5903         /* Check if PFC configuration has changed */
5904         if (memcmp(&new_cfg->pfc,
5905                    &old_cfg->pfc,
5906                    sizeof(new_cfg->pfc))) {
5907                 need_reconfig = true;
5908                 dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
5909         }
5910
5911         /* Check if APP Table has changed */
5912         if (memcmp(&new_cfg->app,
5913                    &old_cfg->app,
5914                    sizeof(new_cfg->app))) {
5915                 need_reconfig = true;
5916                 dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
5917         }
5918
5919         dev_dbg(&pf->pdev->dev, "dcb need_reconfig=%d\n", need_reconfig);
5920         return need_reconfig;
5921 }
5922
5923 /**
5924  * i40e_handle_lldp_event - Handle LLDP Change MIB event
5925  * @pf: board private structure
5926  * @e: event info posted on ARQ
5927  **/
5928 static int i40e_handle_lldp_event(struct i40e_pf *pf,
5929                                   struct i40e_arq_event_info *e)
5930 {
5931         struct i40e_aqc_lldp_get_mib *mib =
5932                 (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
5933         struct i40e_hw *hw = &pf->hw;
5934         struct i40e_dcbx_config tmp_dcbx_cfg;
5935         bool need_reconfig = false;
5936         int ret = 0;
5937         u8 type;
5938
5939         /* Not DCB capable or capability disabled */
5940         if (!(pf->flags & I40E_FLAG_DCB_CAPABLE))
5941                 return ret;
5942
5943         /* Ignore if event is not for Nearest Bridge */
5944         type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
5945                 & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
5946         dev_dbg(&pf->pdev->dev, "LLDP event mib bridge type 0x%x\n", type);
5947         if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
5948                 return ret;
5949
5950         /* Check MIB Type and return if event for Remote MIB update */
5951         type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
5952         dev_dbg(&pf->pdev->dev,
5953                 "LLDP event mib type %s\n", type ? "remote" : "local");
5954         if (type == I40E_AQ_LLDP_MIB_REMOTE) {
5955                 /* Update the remote cached instance and return */
5956                 ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
5957                                 I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
5958                                 &hw->remote_dcbx_config);
5959                 goto exit;
5960         }
5961
5962         /* Store the old configuration */
5963         tmp_dcbx_cfg = hw->local_dcbx_config;
5964
5965         /* Reset the old DCBx configuration data */
5966         memset(&hw->local_dcbx_config, 0, sizeof(hw->local_dcbx_config));
5967         /* Get updated DCBX data from firmware */
5968         ret = i40e_get_dcb_config(&pf->hw);
5969         if (ret) {
5970                 dev_info(&pf->pdev->dev,
5971                          "Failed querying DCB configuration data from firmware, err %s aq_err %s\n",
5972                          i40e_stat_str(&pf->hw, ret),
5973                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
5974                 goto exit;
5975         }
5976
5977         /* No change detected in DCBX configs */
5978         if (!memcmp(&tmp_dcbx_cfg, &hw->local_dcbx_config,
5979                     sizeof(tmp_dcbx_cfg))) {
5980                 dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
5981                 goto exit;
5982         }
5983
5984         need_reconfig = i40e_dcb_need_reconfig(pf, &tmp_dcbx_cfg,
5985                                                &hw->local_dcbx_config);
5986
5987         i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg, &hw->local_dcbx_config);
5988
5989         if (!need_reconfig)
5990                 goto exit;
5991
5992         /* Enable DCB tagging only when more than one TC */
5993         if (i40e_dcb_get_num_tc(&hw->local_dcbx_config) > 1)
5994                 pf->flags |= I40E_FLAG_DCB_ENABLED;
5995         else
5996                 pf->flags &= ~I40E_FLAG_DCB_ENABLED;
5997
5998         set_bit(__I40E_PORT_TX_SUSPENDED, &pf->state);
5999         /* Reconfiguration needed quiesce all VSIs */
6000         i40e_pf_quiesce_all_vsi(pf);
6001
6002         /* Changes in configuration update VEB/VSI */
6003         i40e_dcb_reconfigure(pf);
6004
6005         ret = i40e_resume_port_tx(pf);
6006
6007         clear_bit(__I40E_PORT_TX_SUSPENDED, &pf->state);
6008         /* In case of error no point in resuming VSIs */
6009         if (ret)
6010                 goto exit;
6011
6012         /* Wait for the PF's queues to be disabled */
6013         ret = i40e_pf_wait_queues_disabled(pf);
6014         if (ret) {
6015                 /* Schedule PF reset to recover */
6016                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
6017                 i40e_service_event_schedule(pf);
6018         } else {
6019                 i40e_pf_unquiesce_all_vsi(pf);
6020         pf->flags |= (I40E_FLAG_SERVICE_CLIENT_REQUESTED |
6021                       I40E_FLAG_CLIENT_L2_CHANGE);
6022         }
6023
6024 exit:
6025         return ret;
6026 }
6027 #endif /* CONFIG_I40E_DCB */
6028
6029 /**
6030  * i40e_do_reset_safe - Protected reset path for userland calls.
6031  * @pf: board private structure
6032  * @reset_flags: which reset is requested
6033  *
6034  **/
6035 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
6036 {
6037         rtnl_lock();
6038         i40e_do_reset(pf, reset_flags);
6039         rtnl_unlock();
6040 }
6041
6042 /**
6043  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
6044  * @pf: board private structure
6045  * @e: event info posted on ARQ
6046  *
6047  * Handler for LAN Queue Overflow Event generated by the firmware for PF
6048  * and VF queues
6049  **/
6050 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
6051                                            struct i40e_arq_event_info *e)
6052 {
6053         struct i40e_aqc_lan_overflow *data =
6054                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
6055         u32 queue = le32_to_cpu(data->prtdcb_rupto);
6056         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
6057         struct i40e_hw *hw = &pf->hw;
6058         struct i40e_vf *vf;
6059         u16 vf_id;
6060
6061         dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
6062                 queue, qtx_ctl);
6063
6064         /* Queue belongs to VF, find the VF and issue VF reset */
6065         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
6066             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
6067                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
6068                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
6069                 vf_id -= hw->func_caps.vf_base_id;
6070                 vf = &pf->vf[vf_id];
6071                 i40e_vc_notify_vf_reset(vf);
6072                 /* Allow VF to process pending reset notification */
6073                 msleep(20);
6074                 i40e_reset_vf(vf, false);
6075         }
6076 }
6077
6078 /**
6079  * i40e_get_cur_guaranteed_fd_count - Get the consumed guaranteed FD filters
6080  * @pf: board private structure
6081  **/
6082 u32 i40e_get_cur_guaranteed_fd_count(struct i40e_pf *pf)
6083 {
6084         u32 val, fcnt_prog;
6085
6086         val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
6087         fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK);
6088         return fcnt_prog;
6089 }
6090
6091 /**
6092  * i40e_get_current_fd_count - Get total FD filters programmed for this PF
6093  * @pf: board private structure
6094  **/
6095 u32 i40e_get_current_fd_count(struct i40e_pf *pf)
6096 {
6097         u32 val, fcnt_prog;
6098
6099         val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
6100         fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) +
6101                     ((val & I40E_PFQF_FDSTAT_BEST_CNT_MASK) >>
6102                       I40E_PFQF_FDSTAT_BEST_CNT_SHIFT);
6103         return fcnt_prog;
6104 }
6105
6106 /**
6107  * i40e_get_global_fd_count - Get total FD filters programmed on device
6108  * @pf: board private structure
6109  **/
6110 u32 i40e_get_global_fd_count(struct i40e_pf *pf)
6111 {
6112         u32 val, fcnt_prog;
6113
6114         val = rd32(&pf->hw, I40E_GLQF_FDCNT_0);
6115         fcnt_prog = (val & I40E_GLQF_FDCNT_0_GUARANT_CNT_MASK) +
6116                     ((val & I40E_GLQF_FDCNT_0_BESTCNT_MASK) >>
6117                      I40E_GLQF_FDCNT_0_BESTCNT_SHIFT);
6118         return fcnt_prog;
6119 }
6120
6121 /**
6122  * i40e_fdir_check_and_reenable - Function to reenabe FD ATR or SB if disabled
6123  * @pf: board private structure
6124  **/
6125 void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
6126 {
6127         struct i40e_fdir_filter *filter;
6128         u32 fcnt_prog, fcnt_avail;
6129         struct hlist_node *node;
6130
6131         if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
6132                 return;
6133
6134         /* Check if, FD SB or ATR was auto disabled and if there is enough room
6135          * to re-enable
6136          */
6137         fcnt_prog = i40e_get_global_fd_count(pf);
6138         fcnt_avail = pf->fdir_pf_filter_count;
6139         if ((fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM)) ||
6140             (pf->fd_add_err == 0) ||
6141             (i40e_get_current_atr_cnt(pf) < pf->fd_atr_cnt)) {
6142                 if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
6143                     (pf->hw_disabled_flags & I40E_FLAG_FD_SB_ENABLED)) {
6144                         pf->hw_disabled_flags &= ~I40E_FLAG_FD_SB_ENABLED;
6145                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
6146                                 dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n");
6147                 }
6148         }
6149
6150         /* Wait for some more space to be available to turn on ATR. We also
6151          * must check that no existing ntuple rules for TCP are in effect
6152          */
6153         if (fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM * 2)) {
6154                 if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
6155                     (pf->hw_disabled_flags & I40E_FLAG_FD_ATR_ENABLED) &&
6156                     (pf->fd_tcp_rule == 0)) {
6157                         pf->hw_disabled_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
6158                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
6159                                 dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table and there are no conflicting ntuple rules\n");
6160                 }
6161         }
6162
6163         /* if hw had a problem adding a filter, delete it */
6164         if (pf->fd_inv > 0) {
6165                 hlist_for_each_entry_safe(filter, node,
6166                                           &pf->fdir_filter_list, fdir_node) {
6167                         if (filter->fd_id == pf->fd_inv) {
6168                                 hlist_del(&filter->fdir_node);
6169                                 kfree(filter);
6170                                 pf->fdir_pf_active_filters--;
6171                         }
6172                 }
6173         }
6174 }
6175
6176 #define I40E_MIN_FD_FLUSH_INTERVAL 10
6177 #define I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE 30
6178 /**
6179  * i40e_fdir_flush_and_replay - Function to flush all FD filters and replay SB
6180  * @pf: board private structure
6181  **/
6182 static void i40e_fdir_flush_and_replay(struct i40e_pf *pf)
6183 {
6184         unsigned long min_flush_time;
6185         int flush_wait_retry = 50;
6186         bool disable_atr = false;
6187         int fd_room;
6188         int reg;
6189
6190         if (!time_after(jiffies, pf->fd_flush_timestamp +
6191                                  (I40E_MIN_FD_FLUSH_INTERVAL * HZ)))
6192                 return;
6193
6194         /* If the flush is happening too quick and we have mostly SB rules we
6195          * should not re-enable ATR for some time.
6196          */
6197         min_flush_time = pf->fd_flush_timestamp +
6198                          (I40E_MIN_FD_FLUSH_SB_ATR_UNSTABLE * HZ);
6199         fd_room = pf->fdir_pf_filter_count - pf->fdir_pf_active_filters;
6200
6201         if (!(time_after(jiffies, min_flush_time)) &&
6202             (fd_room < I40E_FDIR_BUFFER_HEAD_ROOM_FOR_ATR)) {
6203                 if (I40E_DEBUG_FD & pf->hw.debug_mask)
6204                         dev_info(&pf->pdev->dev, "ATR disabled, not enough FD filter space.\n");
6205                 disable_atr = true;
6206         }
6207
6208         pf->fd_flush_timestamp = jiffies;
6209         pf->hw_disabled_flags |= I40E_FLAG_FD_ATR_ENABLED;
6210         /* flush all filters */
6211         wr32(&pf->hw, I40E_PFQF_CTL_1,
6212              I40E_PFQF_CTL_1_CLEARFDTABLE_MASK);
6213         i40e_flush(&pf->hw);
6214         pf->fd_flush_cnt++;
6215         pf->fd_add_err = 0;
6216         do {
6217                 /* Check FD flush status every 5-6msec */
6218                 usleep_range(5000, 6000);
6219                 reg = rd32(&pf->hw, I40E_PFQF_CTL_1);
6220                 if (!(reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK))
6221                         break;
6222         } while (flush_wait_retry--);
6223         if (reg & I40E_PFQF_CTL_1_CLEARFDTABLE_MASK) {
6224                 dev_warn(&pf->pdev->dev, "FD table did not flush, needs more time\n");
6225         } else {
6226                 /* replay sideband filters */
6227                 i40e_fdir_filter_restore(pf->vsi[pf->lan_vsi]);
6228                 if (!disable_atr)
6229                         pf->hw_disabled_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
6230                 clear_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state);
6231                 if (I40E_DEBUG_FD & pf->hw.debug_mask)
6232                         dev_info(&pf->pdev->dev, "FD Filter table flushed and FD-SB replayed.\n");
6233         }
6234 }
6235
6236 /**
6237  * i40e_get_current_atr_count - Get the count of total FD ATR filters programmed
6238  * @pf: board private structure
6239  **/
6240 u32 i40e_get_current_atr_cnt(struct i40e_pf *pf)
6241 {
6242         return i40e_get_current_fd_count(pf) - pf->fdir_pf_active_filters;
6243 }
6244
6245 /* We can see up to 256 filter programming desc in transit if the filters are
6246  * being applied really fast; before we see the first
6247  * filter miss error on Rx queue 0. Accumulating enough error messages before
6248  * reacting will make sure we don't cause flush too often.
6249  */
6250 #define I40E_MAX_FD_PROGRAM_ERROR 256
6251
6252 /**
6253  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
6254  * @pf: board private structure
6255  **/
6256 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
6257 {
6258
6259         /* if interface is down do nothing */
6260         if (test_bit(__I40E_DOWN, &pf->state))
6261                 return;
6262
6263         if (test_bit(__I40E_FD_FLUSH_REQUESTED, &pf->state))
6264                 i40e_fdir_flush_and_replay(pf);
6265
6266         i40e_fdir_check_and_reenable(pf);
6267
6268 }
6269
6270 /**
6271  * i40e_vsi_link_event - notify VSI of a link event
6272  * @vsi: vsi to be notified
6273  * @link_up: link up or down
6274  **/
6275 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
6276 {
6277         if (!vsi || test_bit(__I40E_DOWN, &vsi->state))
6278                 return;
6279
6280         switch (vsi->type) {
6281         case I40E_VSI_MAIN:
6282 #ifdef I40E_FCOE
6283         case I40E_VSI_FCOE:
6284 #endif
6285                 if (!vsi->netdev || !vsi->netdev_registered)
6286                         break;
6287
6288                 if (link_up) {
6289                         netif_carrier_on(vsi->netdev);
6290                         netif_tx_wake_all_queues(vsi->netdev);
6291                 } else {
6292                         netif_carrier_off(vsi->netdev);
6293                         netif_tx_stop_all_queues(vsi->netdev);
6294                 }
6295                 break;
6296
6297         case I40E_VSI_SRIOV:
6298         case I40E_VSI_VMDQ2:
6299         case I40E_VSI_CTRL:
6300         case I40E_VSI_IWARP:
6301         case I40E_VSI_MIRROR:
6302         default:
6303                 /* there is no notification for other VSIs */
6304                 break;
6305         }
6306 }
6307
6308 /**
6309  * i40e_veb_link_event - notify elements on the veb of a link event
6310  * @veb: veb to be notified
6311  * @link_up: link up or down
6312  **/
6313 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
6314 {
6315         struct i40e_pf *pf;
6316         int i;
6317
6318         if (!veb || !veb->pf)
6319                 return;
6320         pf = veb->pf;
6321
6322         /* depth first... */
6323         for (i = 0; i < I40E_MAX_VEB; i++)
6324                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
6325                         i40e_veb_link_event(pf->veb[i], link_up);
6326
6327         /* ... now the local VSIs */
6328         for (i = 0; i < pf->num_alloc_vsi; i++)
6329                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
6330                         i40e_vsi_link_event(pf->vsi[i], link_up);
6331 }
6332
6333 /**
6334  * i40e_link_event - Update netif_carrier status
6335  * @pf: board private structure
6336  **/
6337 static void i40e_link_event(struct i40e_pf *pf)
6338 {
6339         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6340         u8 new_link_speed, old_link_speed;
6341         i40e_status status;
6342         bool new_link, old_link;
6343
6344         /* save off old link status information */
6345         pf->hw.phy.link_info_old = pf->hw.phy.link_info;
6346
6347         /* set this to force the get_link_status call to refresh state */
6348         pf->hw.phy.get_link_info = true;
6349
6350         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
6351
6352         status = i40e_get_link_status(&pf->hw, &new_link);
6353
6354         /* On success, disable temp link polling */
6355         if (status == I40E_SUCCESS) {
6356                 if (pf->flags & I40E_FLAG_TEMP_LINK_POLLING)
6357                         pf->flags &= ~I40E_FLAG_TEMP_LINK_POLLING;
6358         } else {
6359                 /* Enable link polling temporarily until i40e_get_link_status
6360                  * returns I40E_SUCCESS
6361                  */
6362                 pf->flags |= I40E_FLAG_TEMP_LINK_POLLING;
6363                 dev_dbg(&pf->pdev->dev, "couldn't get link state, status: %d\n",
6364                         status);
6365                 return;
6366         }
6367
6368         old_link_speed = pf->hw.phy.link_info_old.link_speed;
6369         new_link_speed = pf->hw.phy.link_info.link_speed;
6370
6371         if (new_link == old_link &&
6372             new_link_speed == old_link_speed &&
6373             (test_bit(__I40E_DOWN, &vsi->state) ||
6374              new_link == netif_carrier_ok(vsi->netdev)))
6375                 return;
6376
6377         if (!test_bit(__I40E_DOWN, &vsi->state))
6378                 i40e_print_link_message(vsi, new_link);
6379
6380         /* Notify the base of the switch tree connected to
6381          * the link.  Floating VEBs are not notified.
6382          */
6383         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
6384                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
6385         else
6386                 i40e_vsi_link_event(vsi, new_link);
6387
6388         if (pf->vf)
6389                 i40e_vc_notify_link_state(pf);
6390
6391         if (pf->flags & I40E_FLAG_PTP)
6392                 i40e_ptp_set_increment(pf);
6393 }
6394
6395 /**
6396  * i40e_watchdog_subtask - periodic checks not using event driven response
6397  * @pf: board private structure
6398  **/
6399 static void i40e_watchdog_subtask(struct i40e_pf *pf)
6400 {
6401         int i;
6402
6403         /* if interface is down do nothing */
6404         if (test_bit(__I40E_DOWN, &pf->state) ||
6405             test_bit(__I40E_CONFIG_BUSY, &pf->state))
6406                 return;
6407
6408         /* make sure we don't do these things too often */
6409         if (time_before(jiffies, (pf->service_timer_previous +
6410                                   pf->service_timer_period)))
6411                 return;
6412         pf->service_timer_previous = jiffies;
6413
6414         if ((pf->flags & I40E_FLAG_LINK_POLLING_ENABLED) ||
6415             (pf->flags & I40E_FLAG_TEMP_LINK_POLLING))
6416                 i40e_link_event(pf);
6417
6418         /* Update the stats for active netdevs so the network stack
6419          * can look at updated numbers whenever it cares to
6420          */
6421         for (i = 0; i < pf->num_alloc_vsi; i++)
6422                 if (pf->vsi[i] && pf->vsi[i]->netdev)
6423                         i40e_update_stats(pf->vsi[i]);
6424
6425         if (pf->flags & I40E_FLAG_VEB_STATS_ENABLED) {
6426                 /* Update the stats for the active switching components */
6427                 for (i = 0; i < I40E_MAX_VEB; i++)
6428                         if (pf->veb[i])
6429                                 i40e_update_veb_stats(pf->veb[i]);
6430         }
6431
6432         i40e_ptp_rx_hang(pf->vsi[pf->lan_vsi]);
6433 }
6434
6435 /**
6436  * i40e_reset_subtask - Set up for resetting the device and driver
6437  * @pf: board private structure
6438  **/
6439 static void i40e_reset_subtask(struct i40e_pf *pf)
6440 {
6441         u32 reset_flags = 0;
6442
6443         rtnl_lock();
6444         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
6445                 reset_flags |= BIT(__I40E_REINIT_REQUESTED);
6446                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
6447         }
6448         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
6449                 reset_flags |= BIT(__I40E_PF_RESET_REQUESTED);
6450                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
6451         }
6452         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
6453                 reset_flags |= BIT(__I40E_CORE_RESET_REQUESTED);
6454                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
6455         }
6456         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
6457                 reset_flags |= BIT(__I40E_GLOBAL_RESET_REQUESTED);
6458                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
6459         }
6460         if (test_bit(__I40E_DOWN_REQUESTED, &pf->state)) {
6461                 reset_flags |= BIT(__I40E_DOWN_REQUESTED);
6462                 clear_bit(__I40E_DOWN_REQUESTED, &pf->state);
6463         }
6464
6465         /* If there's a recovery already waiting, it takes
6466          * precedence before starting a new reset sequence.
6467          */
6468         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
6469                 i40e_handle_reset_warning(pf);
6470                 goto unlock;
6471         }
6472
6473         /* If we're already down or resetting, just bail */
6474         if (reset_flags &&
6475             !test_bit(__I40E_DOWN, &pf->state) &&
6476             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
6477                 i40e_do_reset(pf, reset_flags);
6478
6479 unlock:
6480         rtnl_unlock();
6481 }
6482
6483 /**
6484  * i40e_handle_link_event - Handle link event
6485  * @pf: board private structure
6486  * @e: event info posted on ARQ
6487  **/
6488 static void i40e_handle_link_event(struct i40e_pf *pf,
6489                                    struct i40e_arq_event_info *e)
6490 {
6491         struct i40e_aqc_get_link_status *status =
6492                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
6493
6494         /* Do a new status request to re-enable LSE reporting
6495          * and load new status information into the hw struct
6496          * This completely ignores any state information
6497          * in the ARQ event info, instead choosing to always
6498          * issue the AQ update link status command.
6499          */
6500         i40e_link_event(pf);
6501
6502         /* check for unqualified module, if link is down */
6503         if ((status->link_info & I40E_AQ_MEDIA_AVAILABLE) &&
6504             (!(status->an_info & I40E_AQ_QUALIFIED_MODULE)) &&
6505             (!(status->link_info & I40E_AQ_LINK_UP)))
6506                 dev_err(&pf->pdev->dev,
6507                         "The driver failed to link because an unqualified module was detected.\n");
6508 }
6509
6510 /**
6511  * i40e_clean_adminq_subtask - Clean the AdminQ rings
6512  * @pf: board private structure
6513  **/
6514 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
6515 {
6516         struct i40e_arq_event_info event;
6517         struct i40e_hw *hw = &pf->hw;
6518         u16 pending, i = 0;
6519         i40e_status ret;
6520         u16 opcode;
6521         u32 oldval;
6522         u32 val;
6523
6524         /* Do not run clean AQ when PF reset fails */
6525         if (test_bit(__I40E_RESET_FAILED, &pf->state))
6526                 return;
6527
6528         /* check for error indications */
6529         val = rd32(&pf->hw, pf->hw.aq.arq.len);
6530         oldval = val;
6531         if (val & I40E_PF_ARQLEN_ARQVFE_MASK) {
6532                 if (hw->debug_mask & I40E_DEBUG_AQ)
6533                         dev_info(&pf->pdev->dev, "ARQ VF Error detected\n");
6534                 val &= ~I40E_PF_ARQLEN_ARQVFE_MASK;
6535         }
6536         if (val & I40E_PF_ARQLEN_ARQOVFL_MASK) {
6537                 if (hw->debug_mask & I40E_DEBUG_AQ)
6538                         dev_info(&pf->pdev->dev, "ARQ Overflow Error detected\n");
6539                 val &= ~I40E_PF_ARQLEN_ARQOVFL_MASK;
6540                 pf->arq_overflows++;
6541         }
6542         if (val & I40E_PF_ARQLEN_ARQCRIT_MASK) {
6543                 if (hw->debug_mask & I40E_DEBUG_AQ)
6544                         dev_info(&pf->pdev->dev, "ARQ Critical Error detected\n");
6545                 val &= ~I40E_PF_ARQLEN_ARQCRIT_MASK;
6546         }
6547         if (oldval != val)
6548                 wr32(&pf->hw, pf->hw.aq.arq.len, val);
6549
6550         val = rd32(&pf->hw, pf->hw.aq.asq.len);
6551         oldval = val;
6552         if (val & I40E_PF_ATQLEN_ATQVFE_MASK) {
6553                 if (pf->hw.debug_mask & I40E_DEBUG_AQ)
6554                         dev_info(&pf->pdev->dev, "ASQ VF Error detected\n");
6555                 val &= ~I40E_PF_ATQLEN_ATQVFE_MASK;
6556         }
6557         if (val & I40E_PF_ATQLEN_ATQOVFL_MASK) {
6558                 if (pf->hw.debug_mask & I40E_DEBUG_AQ)
6559                         dev_info(&pf->pdev->dev, "ASQ Overflow Error detected\n");
6560                 val &= ~I40E_PF_ATQLEN_ATQOVFL_MASK;
6561         }
6562         if (val & I40E_PF_ATQLEN_ATQCRIT_MASK) {
6563                 if (pf->hw.debug_mask & I40E_DEBUG_AQ)
6564                         dev_info(&pf->pdev->dev, "ASQ Critical Error detected\n");
6565                 val &= ~I40E_PF_ATQLEN_ATQCRIT_MASK;
6566         }
6567         if (oldval != val)
6568                 wr32(&pf->hw, pf->hw.aq.asq.len, val);
6569
6570         event.buf_len = I40E_MAX_AQ_BUF_SIZE;
6571         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
6572         if (!event.msg_buf)
6573                 return;
6574
6575         do {
6576                 ret = i40e_clean_arq_element(hw, &event, &pending);
6577                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK)
6578                         break;
6579                 else if (ret) {
6580                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
6581                         break;
6582                 }
6583
6584                 opcode = le16_to_cpu(event.desc.opcode);
6585                 switch (opcode) {
6586
6587                 case i40e_aqc_opc_get_link_status:
6588                         i40e_handle_link_event(pf, &event);
6589                         break;
6590                 case i40e_aqc_opc_send_msg_to_pf:
6591                         ret = i40e_vc_process_vf_msg(pf,
6592                                         le16_to_cpu(event.desc.retval),
6593                                         le32_to_cpu(event.desc.cookie_high),
6594                                         le32_to_cpu(event.desc.cookie_low),
6595                                         event.msg_buf,
6596                                         event.msg_len);
6597                         break;
6598                 case i40e_aqc_opc_lldp_update_mib:
6599                         dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
6600 #ifdef CONFIG_I40E_DCB
6601                         rtnl_lock();
6602                         ret = i40e_handle_lldp_event(pf, &event);
6603                         rtnl_unlock();
6604 #endif /* CONFIG_I40E_DCB */
6605                         break;
6606                 case i40e_aqc_opc_event_lan_overflow:
6607                         dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
6608                         i40e_handle_lan_overflow_event(pf, &event);
6609                         break;
6610                 case i40e_aqc_opc_send_msg_to_peer:
6611                         dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
6612                         break;
6613                 case i40e_aqc_opc_nvm_erase:
6614                 case i40e_aqc_opc_nvm_update:
6615                 case i40e_aqc_opc_oem_post_update:
6616                         i40e_debug(&pf->hw, I40E_DEBUG_NVM,
6617                                    "ARQ NVM operation 0x%04x completed\n",
6618                                    opcode);
6619                         break;
6620                 default:
6621                         dev_info(&pf->pdev->dev,
6622                                  "ARQ: Unknown event 0x%04x ignored\n",
6623                                  opcode);
6624                         break;
6625                 }
6626         } while (pending && (i++ < pf->adminq_work_limit));
6627
6628         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
6629         /* re-enable Admin queue interrupt cause */
6630         val = rd32(hw, I40E_PFINT_ICR0_ENA);
6631         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
6632         wr32(hw, I40E_PFINT_ICR0_ENA, val);
6633         i40e_flush(hw);
6634
6635         kfree(event.msg_buf);
6636 }
6637
6638 /**
6639  * i40e_verify_eeprom - make sure eeprom is good to use
6640  * @pf: board private structure
6641  **/
6642 static void i40e_verify_eeprom(struct i40e_pf *pf)
6643 {
6644         int err;
6645
6646         err = i40e_diag_eeprom_test(&pf->hw);
6647         if (err) {
6648                 /* retry in case of garbage read */
6649                 err = i40e_diag_eeprom_test(&pf->hw);
6650                 if (err) {
6651                         dev_info(&pf->pdev->dev, "eeprom check failed (%d), Tx/Rx traffic disabled\n",
6652                                  err);
6653                         set_bit(__I40E_BAD_EEPROM, &pf->state);
6654                 }
6655         }
6656
6657         if (!err && test_bit(__I40E_BAD_EEPROM, &pf->state)) {
6658                 dev_info(&pf->pdev->dev, "eeprom check passed, Tx/Rx traffic enabled\n");
6659                 clear_bit(__I40E_BAD_EEPROM, &pf->state);
6660         }
6661 }
6662
6663 /**
6664  * i40e_enable_pf_switch_lb
6665  * @pf: pointer to the PF structure
6666  *
6667  * enable switch loop back or die - no point in a return value
6668  **/
6669 static void i40e_enable_pf_switch_lb(struct i40e_pf *pf)
6670 {
6671         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6672         struct i40e_vsi_context ctxt;
6673         int ret;
6674
6675         ctxt.seid = pf->main_vsi_seid;
6676         ctxt.pf_num = pf->hw.pf_id;
6677         ctxt.vf_num = 0;
6678         ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6679         if (ret) {
6680                 dev_info(&pf->pdev->dev,
6681                          "couldn't get PF vsi config, err %s aq_err %s\n",
6682                          i40e_stat_str(&pf->hw, ret),
6683                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6684                 return;
6685         }
6686         ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6687         ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6688         ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6689
6690         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
6691         if (ret) {
6692                 dev_info(&pf->pdev->dev,
6693                          "update vsi switch failed, err %s aq_err %s\n",
6694                          i40e_stat_str(&pf->hw, ret),
6695                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6696         }
6697 }
6698
6699 /**
6700  * i40e_disable_pf_switch_lb
6701  * @pf: pointer to the PF structure
6702  *
6703  * disable switch loop back or die - no point in a return value
6704  **/
6705 static void i40e_disable_pf_switch_lb(struct i40e_pf *pf)
6706 {
6707         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
6708         struct i40e_vsi_context ctxt;
6709         int ret;
6710
6711         ctxt.seid = pf->main_vsi_seid;
6712         ctxt.pf_num = pf->hw.pf_id;
6713         ctxt.vf_num = 0;
6714         ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6715         if (ret) {
6716                 dev_info(&pf->pdev->dev,
6717                          "couldn't get PF vsi config, err %s aq_err %s\n",
6718                          i40e_stat_str(&pf->hw, ret),
6719                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6720                 return;
6721         }
6722         ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6723         ctxt.info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6724         ctxt.info.switch_id &= ~cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6725
6726         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
6727         if (ret) {
6728                 dev_info(&pf->pdev->dev,
6729                          "update vsi switch failed, err %s aq_err %s\n",
6730                          i40e_stat_str(&pf->hw, ret),
6731                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
6732         }
6733 }
6734
6735 /**
6736  * i40e_config_bridge_mode - Configure the HW bridge mode
6737  * @veb: pointer to the bridge instance
6738  *
6739  * Configure the loop back mode for the LAN VSI that is downlink to the
6740  * specified HW bridge instance. It is expected this function is called
6741  * when a new HW bridge is instantiated.
6742  **/
6743 static void i40e_config_bridge_mode(struct i40e_veb *veb)
6744 {
6745         struct i40e_pf *pf = veb->pf;
6746
6747         if (pf->hw.debug_mask & I40E_DEBUG_LAN)
6748                 dev_info(&pf->pdev->dev, "enabling bridge mode: %s\n",
6749                          veb->bridge_mode == BRIDGE_MODE_VEPA ? "VEPA" : "VEB");
6750         if (veb->bridge_mode & BRIDGE_MODE_VEPA)
6751                 i40e_disable_pf_switch_lb(pf);
6752         else
6753                 i40e_enable_pf_switch_lb(pf);
6754 }
6755
6756 /**
6757  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
6758  * @veb: pointer to the VEB instance
6759  *
6760  * This is a recursive function that first builds the attached VSIs then
6761  * recurses in to build the next layer of VEB.  We track the connections
6762  * through our own index numbers because the seid's from the HW could
6763  * change across the reset.
6764  **/
6765 static int i40e_reconstitute_veb(struct i40e_veb *veb)
6766 {
6767         struct i40e_vsi *ctl_vsi = NULL;
6768         struct i40e_pf *pf = veb->pf;
6769         int v, veb_idx;
6770         int ret;
6771
6772         /* build VSI that owns this VEB, temporarily attached to base VEB */
6773         for (v = 0; v < pf->num_alloc_vsi && !ctl_vsi; v++) {
6774                 if (pf->vsi[v] &&
6775                     pf->vsi[v]->veb_idx == veb->idx &&
6776                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
6777                         ctl_vsi = pf->vsi[v];
6778                         break;
6779                 }
6780         }
6781         if (!ctl_vsi) {
6782                 dev_info(&pf->pdev->dev,
6783                          "missing owner VSI for veb_idx %d\n", veb->idx);
6784                 ret = -ENOENT;
6785                 goto end_reconstitute;
6786         }
6787         if (ctl_vsi != pf->vsi[pf->lan_vsi])
6788                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
6789         ret = i40e_add_vsi(ctl_vsi);
6790         if (ret) {
6791                 dev_info(&pf->pdev->dev,
6792                          "rebuild of veb_idx %d owner VSI failed: %d\n",
6793                          veb->idx, ret);
6794                 goto end_reconstitute;
6795         }
6796         i40e_vsi_reset_stats(ctl_vsi);
6797
6798         /* create the VEB in the switch and move the VSI onto the VEB */
6799         ret = i40e_add_veb(veb, ctl_vsi);
6800         if (ret)
6801                 goto end_reconstitute;
6802
6803         if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
6804                 veb->bridge_mode = BRIDGE_MODE_VEB;
6805         else
6806                 veb->bridge_mode = BRIDGE_MODE_VEPA;
6807         i40e_config_bridge_mode(veb);
6808
6809         /* create the remaining VSIs attached to this VEB */
6810         for (v = 0; v < pf->num_alloc_vsi; v++) {
6811                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
6812                         continue;
6813
6814                 if (pf->vsi[v]->veb_idx == veb->idx) {
6815                         struct i40e_vsi *vsi = pf->vsi[v];
6816
6817                         vsi->uplink_seid = veb->seid;
6818                         ret = i40e_add_vsi(vsi);
6819                         if (ret) {
6820                                 dev_info(&pf->pdev->dev,
6821                                          "rebuild of vsi_idx %d failed: %d\n",
6822                                          v, ret);
6823                                 goto end_reconstitute;
6824                         }
6825                         i40e_vsi_reset_stats(vsi);
6826                 }
6827         }
6828
6829         /* create any VEBs attached to this VEB - RECURSION */
6830         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
6831                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
6832                         pf->veb[veb_idx]->uplink_seid = veb->seid;
6833                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
6834                         if (ret)
6835                                 break;
6836                 }
6837         }
6838
6839 end_reconstitute:
6840         return ret;
6841 }
6842
6843 /**
6844  * i40e_get_capabilities - get info about the HW
6845  * @pf: the PF struct
6846  **/
6847 static int i40e_get_capabilities(struct i40e_pf *pf)
6848 {
6849         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
6850         u16 data_size;
6851         int buf_len;
6852         int err;
6853
6854         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
6855         do {
6856                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
6857                 if (!cap_buf)
6858                         return -ENOMEM;
6859
6860                 /* this loads the data into the hw struct for us */
6861                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
6862                                             &data_size,
6863                                             i40e_aqc_opc_list_func_capabilities,
6864                                             NULL);
6865                 /* data loaded, buffer no longer needed */
6866                 kfree(cap_buf);
6867
6868                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
6869                         /* retry with a larger buffer */
6870                         buf_len = data_size;
6871                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
6872                         dev_info(&pf->pdev->dev,
6873                                  "capability discovery failed, err %s aq_err %s\n",
6874                                  i40e_stat_str(&pf->hw, err),
6875                                  i40e_aq_str(&pf->hw,
6876                                              pf->hw.aq.asq_last_status));
6877                         return -ENODEV;
6878                 }
6879         } while (err);
6880
6881         if (pf->hw.debug_mask & I40E_DEBUG_USER)
6882                 dev_info(&pf->pdev->dev,
6883                          "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
6884                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
6885                          pf->hw.func_caps.num_msix_vectors,
6886                          pf->hw.func_caps.num_msix_vectors_vf,
6887                          pf->hw.func_caps.fd_filters_guaranteed,
6888                          pf->hw.func_caps.fd_filters_best_effort,
6889                          pf->hw.func_caps.num_tx_qp,
6890                          pf->hw.func_caps.num_vsis);
6891
6892 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
6893                        + pf->hw.func_caps.num_vfs)
6894         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
6895                 dev_info(&pf->pdev->dev,
6896                          "got num_vsis %d, setting num_vsis to %d\n",
6897                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
6898                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
6899         }
6900
6901         return 0;
6902 }
6903
6904 static int i40e_vsi_clear(struct i40e_vsi *vsi);
6905
6906 /**
6907  * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
6908  * @pf: board private structure
6909  **/
6910 static void i40e_fdir_sb_setup(struct i40e_pf *pf)
6911 {
6912         struct i40e_vsi *vsi;
6913
6914         /* quick workaround for an NVM issue that leaves a critical register
6915          * uninitialized
6916          */
6917         if (!rd32(&pf->hw, I40E_GLQF_HKEY(0))) {
6918                 static const u32 hkey[] = {
6919                         0xe640d33f, 0xcdfe98ab, 0x73fa7161, 0x0d7a7d36,
6920                         0xeacb7d61, 0xaa4f05b6, 0x9c5c89ed, 0xfc425ddb,
6921                         0xa4654832, 0xfc7461d4, 0x8f827619, 0xf5c63c21,
6922                         0x95b3a76d};
6923                 int i;
6924
6925                 for (i = 0; i <= I40E_GLQF_HKEY_MAX_INDEX; i++)
6926                         wr32(&pf->hw, I40E_GLQF_HKEY(i), hkey[i]);
6927         }
6928
6929         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
6930                 return;
6931
6932         /* find existing VSI and see if it needs configuring */
6933         vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);
6934
6935         /* create a new VSI if none exists */
6936         if (!vsi) {
6937                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR,
6938                                      pf->vsi[pf->lan_vsi]->seid, 0);
6939                 if (!vsi) {
6940                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
6941                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
6942                         return;
6943                 }
6944         }
6945
6946         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
6947 }
6948
6949 /**
6950  * i40e_fdir_teardown - release the Flow Director resources
6951  * @pf: board private structure
6952  **/
6953 static void i40e_fdir_teardown(struct i40e_pf *pf)
6954 {
6955         struct i40e_vsi *vsi;
6956
6957         i40e_fdir_filter_exit(pf);
6958         vsi = i40e_find_vsi_by_type(pf, I40E_VSI_FDIR);
6959         if (vsi)
6960                 i40e_vsi_release(vsi);
6961 }
6962
6963 /**
6964  * i40e_prep_for_reset - prep for the core to reset
6965  * @pf: board private structure
6966  *
6967  * Close up the VFs and other things in prep for PF Reset.
6968   **/
6969 static void i40e_prep_for_reset(struct i40e_pf *pf)
6970 {
6971         struct i40e_hw *hw = &pf->hw;
6972         i40e_status ret = 0;
6973         u32 v;
6974
6975         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
6976         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
6977                 return;
6978         if (i40e_check_asq_alive(&pf->hw))
6979                 i40e_vc_notify_reset(pf);
6980
6981         dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");
6982
6983         /* quiesce the VSIs and their queues that are not already DOWN */
6984         i40e_pf_quiesce_all_vsi(pf);
6985
6986         for (v = 0; v < pf->num_alloc_vsi; v++) {
6987                 if (pf->vsi[v])
6988                         pf->vsi[v]->seid = 0;
6989         }
6990
6991         i40e_shutdown_adminq(&pf->hw);
6992
6993         /* call shutdown HMC */
6994         if (hw->hmc.hmc_obj) {
6995                 ret = i40e_shutdown_lan_hmc(hw);
6996                 if (ret)
6997                         dev_warn(&pf->pdev->dev,
6998                                  "shutdown_lan_hmc failed: %d\n", ret);
6999         }
7000 }
7001
7002 /**
7003  * i40e_send_version - update firmware with driver version
7004  * @pf: PF struct
7005  */
7006 static void i40e_send_version(struct i40e_pf *pf)
7007 {
7008         struct i40e_driver_version dv;
7009
7010         dv.major_version = DRV_VERSION_MAJOR;
7011         dv.minor_version = DRV_VERSION_MINOR;
7012         dv.build_version = DRV_VERSION_BUILD;
7013         dv.subbuild_version = 0;
7014         strlcpy(dv.driver_string, DRV_VERSION, sizeof(dv.driver_string));
7015         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
7016 }
7017
7018 /**
7019  * i40e_reset_and_rebuild - reset and rebuild using a saved config
7020  * @pf: board private structure
7021  * @reinit: if the Main VSI needs to re-initialized.
7022  **/
7023 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
7024 {
7025         struct i40e_hw *hw = &pf->hw;
7026         u8 set_fc_aq_fail = 0;
7027         i40e_status ret;
7028         u32 val;
7029         u32 v;
7030
7031         /* Now we wait for GRST to settle out.
7032          * We don't have to delete the VEBs or VSIs from the hw switch
7033          * because the reset will make them disappear.
7034          */
7035         ret = i40e_pf_reset(hw);
7036         if (ret) {
7037                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
7038                 set_bit(__I40E_RESET_FAILED, &pf->state);
7039                 goto clear_recovery;
7040         }
7041         pf->pfr_count++;
7042
7043         if (test_bit(__I40E_DOWN, &pf->state))
7044                 goto clear_recovery;
7045         dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
7046
7047         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
7048         ret = i40e_init_adminq(&pf->hw);
7049         if (ret) {
7050                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, err %s aq_err %s\n",
7051                          i40e_stat_str(&pf->hw, ret),
7052                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
7053                 goto clear_recovery;
7054         }
7055
7056         /* re-verify the eeprom if we just had an EMP reset */
7057         if (test_and_clear_bit(__I40E_EMP_RESET_INTR_RECEIVED, &pf->state))
7058                 i40e_verify_eeprom(pf);
7059
7060         i40e_clear_pxe_mode(hw);
7061         ret = i40e_get_capabilities(pf);
7062         if (ret)
7063                 goto end_core_reset;
7064
7065         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
7066                                 hw->func_caps.num_rx_qp,
7067                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
7068         if (ret) {
7069                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
7070                 goto end_core_reset;
7071         }
7072         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
7073         if (ret) {
7074                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
7075                 goto end_core_reset;
7076         }
7077
7078 #ifdef CONFIG_I40E_DCB
7079         ret = i40e_init_pf_dcb(pf);
7080         if (ret) {
7081                 dev_info(&pf->pdev->dev, "DCB init failed %d, disabled\n", ret);
7082                 pf->flags &= ~I40E_FLAG_DCB_CAPABLE;
7083                 /* Continue without DCB enabled */
7084         }
7085 #endif /* CONFIG_I40E_DCB */
7086 #ifdef I40E_FCOE
7087         i40e_init_pf_fcoe(pf);
7088
7089 #endif
7090         /* do basic switch setup */
7091         ret = i40e_setup_pf_switch(pf, reinit);
7092         if (ret)
7093                 goto end_core_reset;
7094
7095         /* The driver only wants link up/down and module qualification
7096          * reports from firmware.  Note the negative logic.
7097          */
7098         ret = i40e_aq_set_phy_int_mask(&pf->hw,
7099                                        ~(I40E_AQ_EVENT_LINK_UPDOWN |
7100                                          I40E_AQ_EVENT_MEDIA_NA |
7101                                          I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
7102         if (ret)
7103                 dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
7104                          i40e_stat_str(&pf->hw, ret),
7105                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
7106
7107         /* make sure our flow control settings are restored */
7108         ret = i40e_set_fc(&pf->hw, &set_fc_aq_fail, true);
7109         if (ret)
7110                 dev_dbg(&pf->pdev->dev, "setting flow control: ret = %s last_status = %s\n",
7111                         i40e_stat_str(&pf->hw, ret),
7112                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
7113
7114         /* Rebuild the VSIs and VEBs that existed before reset.
7115          * They are still in our local switch element arrays, so only
7116          * need to rebuild the switch model in the HW.
7117          *
7118          * If there were VEBs but the reconstitution failed, we'll try
7119          * try to recover minimal use by getting the basic PF VSI working.
7120          */
7121         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
7122                 dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");
7123                 /* find the one VEB connected to the MAC, and find orphans */
7124                 for (v = 0; v < I40E_MAX_VEB; v++) {
7125                         if (!pf->veb[v])
7126                                 continue;
7127
7128                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
7129                             pf->veb[v]->uplink_seid == 0) {
7130                                 ret = i40e_reconstitute_veb(pf->veb[v]);
7131
7132                                 if (!ret)
7133                                         continue;
7134
7135                                 /* If Main VEB failed, we're in deep doodoo,
7136                                  * so give up rebuilding the switch and set up
7137                                  * for minimal rebuild of PF VSI.
7138                                  * If orphan failed, we'll report the error
7139                                  * but try to keep going.
7140                                  */
7141                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
7142                                         dev_info(&pf->pdev->dev,
7143                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
7144                                                  ret);
7145                                         pf->vsi[pf->lan_vsi]->uplink_seid
7146                                                                 = pf->mac_seid;
7147                                         break;
7148                                 } else if (pf->veb[v]->uplink_seid == 0) {
7149                                         dev_info(&pf->pdev->dev,
7150                                                  "rebuild of orphan VEB failed: %d\n",
7151                                                  ret);
7152                                 }
7153                         }
7154                 }
7155         }
7156
7157         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
7158                 dev_dbg(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
7159                 /* no VEB, so rebuild only the Main VSI */
7160                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
7161                 if (ret) {
7162                         dev_info(&pf->pdev->dev,
7163                                  "rebuild of Main VSI failed: %d\n", ret);
7164                         goto end_core_reset;
7165                 }
7166         }
7167
7168         /* Reconfigure hardware for allowing smaller MSS in the case
7169          * of TSO, so that we avoid the MDD being fired and causing
7170          * a reset in the case of small MSS+TSO.
7171          */
7172 #define I40E_REG_MSS          0x000E64DC
7173 #define I40E_REG_MSS_MIN_MASK 0x3FF0000
7174 #define I40E_64BYTE_MSS       0x400000
7175         val = rd32(hw, I40E_REG_MSS);
7176         if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
7177                 val &= ~I40E_REG_MSS_MIN_MASK;
7178                 val |= I40E_64BYTE_MSS;
7179                 wr32(hw, I40E_REG_MSS, val);
7180         }
7181
7182         if (pf->flags & I40E_FLAG_RESTART_AUTONEG) {
7183                 msleep(75);
7184                 ret = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
7185                 if (ret)
7186                         dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
7187                                  i40e_stat_str(&pf->hw, ret),
7188                                  i40e_aq_str(&pf->hw,
7189                                              pf->hw.aq.asq_last_status));
7190         }
7191         /* reinit the misc interrupt */
7192         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
7193                 ret = i40e_setup_misc_vector(pf);
7194
7195         /* Add a filter to drop all Flow control frames from any VSI from being
7196          * transmitted. By doing so we stop a malicious VF from sending out
7197          * PAUSE or PFC frames and potentially controlling traffic for other
7198          * PF/VF VSIs.
7199          * The FW can still send Flow control frames if enabled.
7200          */
7201         i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
7202                                                        pf->main_vsi_seid);
7203
7204         /* restart the VSIs that were rebuilt and running before the reset */
7205         i40e_pf_unquiesce_all_vsi(pf);
7206
7207         if (pf->num_alloc_vfs) {
7208                 for (v = 0; v < pf->num_alloc_vfs; v++)
7209                         i40e_reset_vf(&pf->vf[v], true);
7210         }
7211
7212         /* tell the firmware that we're starting */
7213         i40e_send_version(pf);
7214
7215 end_core_reset:
7216         clear_bit(__I40E_RESET_FAILED, &pf->state);
7217 clear_recovery:
7218         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
7219 }
7220
7221 /**
7222  * i40e_handle_reset_warning - prep for the PF to reset, reset and rebuild
7223  * @pf: board private structure
7224  *
7225  * Close up the VFs and other things in prep for a Core Reset,
7226  * then get ready to rebuild the world.
7227  **/
7228 static void i40e_handle_reset_warning(struct i40e_pf *pf)
7229 {
7230         i40e_prep_for_reset(pf);
7231         i40e_reset_and_rebuild(pf, false);
7232 }
7233
7234 /**
7235  * i40e_handle_mdd_event
7236  * @pf: pointer to the PF structure
7237  *
7238  * Called from the MDD irq handler to identify possibly malicious vfs
7239  **/
7240 static void i40e_handle_mdd_event(struct i40e_pf *pf)
7241 {
7242         struct i40e_hw *hw = &pf->hw;
7243         bool mdd_detected = false;
7244         bool pf_mdd_detected = false;
7245         struct i40e_vf *vf;
7246         u32 reg;
7247         int i;
7248
7249         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
7250                 return;
7251
7252         /* find what triggered the MDD event */
7253         reg = rd32(hw, I40E_GL_MDET_TX);
7254         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
7255                 u8 pf_num = (reg & I40E_GL_MDET_TX_PF_NUM_MASK) >>
7256                                 I40E_GL_MDET_TX_PF_NUM_SHIFT;
7257                 u16 vf_num = (reg & I40E_GL_MDET_TX_VF_NUM_MASK) >>
7258                                 I40E_GL_MDET_TX_VF_NUM_SHIFT;
7259                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_MASK) >>
7260                                 I40E_GL_MDET_TX_EVENT_SHIFT;
7261                 u16 queue = ((reg & I40E_GL_MDET_TX_QUEUE_MASK) >>
7262                                 I40E_GL_MDET_TX_QUEUE_SHIFT) -
7263                                 pf->hw.func_caps.base_queue;
7264                 if (netif_msg_tx_err(pf))
7265                         dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on TX queue %d PF number 0x%02x VF number 0x%02x\n",
7266                                  event, queue, pf_num, vf_num);
7267                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
7268                 mdd_detected = true;
7269         }
7270         reg = rd32(hw, I40E_GL_MDET_RX);
7271         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
7272                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK) >>
7273                                 I40E_GL_MDET_RX_FUNCTION_SHIFT;
7274                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_MASK) >>
7275                                 I40E_GL_MDET_RX_EVENT_SHIFT;
7276                 u16 queue = ((reg & I40E_GL_MDET_RX_QUEUE_MASK) >>
7277                                 I40E_GL_MDET_RX_QUEUE_SHIFT) -
7278                                 pf->hw.func_caps.base_queue;
7279                 if (netif_msg_rx_err(pf))
7280                         dev_info(&pf->pdev->dev, "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
7281                                  event, queue, func);
7282                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
7283                 mdd_detected = true;
7284         }
7285
7286         if (mdd_detected) {
7287                 reg = rd32(hw, I40E_PF_MDET_TX);
7288                 if (reg & I40E_PF_MDET_TX_VALID_MASK) {
7289                         wr32(hw, I40E_PF_MDET_TX, 0xFFFF);
7290                         dev_info(&pf->pdev->dev, "TX driver issue detected, PF reset issued\n");
7291                         pf_mdd_detected = true;
7292                 }
7293                 reg = rd32(hw, I40E_PF_MDET_RX);
7294                 if (reg & I40E_PF_MDET_RX_VALID_MASK) {
7295                         wr32(hw, I40E_PF_MDET_RX, 0xFFFF);
7296                         dev_info(&pf->pdev->dev, "RX driver issue detected, PF reset issued\n");
7297                         pf_mdd_detected = true;
7298                 }
7299                 /* Queue belongs to the PF, initiate a reset */
7300                 if (pf_mdd_detected) {
7301                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
7302                         i40e_service_event_schedule(pf);
7303                 }
7304         }
7305
7306         /* see if one of the VFs needs its hand slapped */
7307         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
7308                 vf = &(pf->vf[i]);
7309                 reg = rd32(hw, I40E_VP_MDET_TX(i));
7310                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
7311                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
7312                         vf->num_mdd_events++;
7313                         dev_info(&pf->pdev->dev, "TX driver issue detected on VF %d\n",
7314                                  i);
7315                 }
7316
7317                 reg = rd32(hw, I40E_VP_MDET_RX(i));
7318                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
7319                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
7320                         vf->num_mdd_events++;
7321                         dev_info(&pf->pdev->dev, "RX driver issue detected on VF %d\n",
7322                                  i);
7323                 }
7324
7325                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
7326                         dev_info(&pf->pdev->dev,
7327                                  "Too many MDD events on VF %d, disabled\n", i);
7328                         dev_info(&pf->pdev->dev,
7329                                  "Use PF Control I/F to re-enable the VF\n");
7330                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
7331                 }
7332         }
7333
7334         /* re-enable mdd interrupt cause */
7335         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
7336         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
7337         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
7338         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
7339         i40e_flush(hw);
7340 }
7341
7342 /**
7343  * i40e_sync_udp_filters_subtask - Sync the VSI filter list with HW
7344  * @pf: board private structure
7345  **/
7346 static void i40e_sync_udp_filters_subtask(struct i40e_pf *pf)
7347 {
7348         struct i40e_hw *hw = &pf->hw;
7349         i40e_status ret;
7350         u16 port;
7351         int i;
7352
7353         if (!(pf->flags & I40E_FLAG_UDP_FILTER_SYNC))
7354                 return;
7355
7356         pf->flags &= ~I40E_FLAG_UDP_FILTER_SYNC;
7357
7358         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
7359                 if (pf->pending_udp_bitmap & BIT_ULL(i)) {
7360                         pf->pending_udp_bitmap &= ~BIT_ULL(i);
7361                         port = pf->udp_ports[i].index;
7362                         if (port)
7363                                 ret = i40e_aq_add_udp_tunnel(hw, port,
7364                                                         pf->udp_ports[i].type,
7365                                                         NULL, NULL);
7366                         else
7367                                 ret = i40e_aq_del_udp_tunnel(hw, i, NULL);
7368
7369                         if (ret) {
7370                                 dev_dbg(&pf->pdev->dev,
7371                                         "%s %s port %d, index %d failed, err %s aq_err %s\n",
7372                                         pf->udp_ports[i].type ? "vxlan" : "geneve",
7373                                         port ? "add" : "delete",
7374                                         port, i,
7375                                         i40e_stat_str(&pf->hw, ret),
7376                                         i40e_aq_str(&pf->hw,
7377                                                     pf->hw.aq.asq_last_status));
7378                                 pf->udp_ports[i].index = 0;
7379                         }
7380                 }
7381         }
7382 }
7383
7384 /**
7385  * i40e_service_task - Run the driver's async subtasks
7386  * @work: pointer to work_struct containing our data
7387  **/
7388 static void i40e_service_task(struct work_struct *work)
7389 {
7390         struct i40e_pf *pf = container_of(work,
7391                                           struct i40e_pf,
7392                                           service_task);
7393         unsigned long start_time = jiffies;
7394
7395         /* don't bother with service tasks if a reset is in progress */
7396         if (test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
7397                 return;
7398         }
7399
7400         if (test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
7401                 return;
7402
7403         i40e_detect_recover_hung(pf);
7404         i40e_sync_filters_subtask(pf);
7405         i40e_reset_subtask(pf);
7406         i40e_handle_mdd_event(pf);
7407         i40e_vc_process_vflr_event(pf);
7408         i40e_watchdog_subtask(pf);
7409         i40e_fdir_reinit_subtask(pf);
7410         if (pf->flags & I40E_FLAG_CLIENT_RESET) {
7411                 /* Client subtask will reopen next time through. */
7412                 i40e_notify_client_of_netdev_close(pf->vsi[pf->lan_vsi], true);
7413                 pf->flags &= ~I40E_FLAG_CLIENT_RESET;
7414         } else {
7415                 i40e_client_subtask(pf);
7416                 if (pf->flags & I40E_FLAG_CLIENT_L2_CHANGE) {
7417                         i40e_notify_client_of_l2_param_changes(
7418                                                         pf->vsi[pf->lan_vsi]);
7419                         pf->flags &= ~I40E_FLAG_CLIENT_L2_CHANGE;
7420                 }
7421         }
7422         i40e_sync_filters_subtask(pf);
7423         i40e_sync_udp_filters_subtask(pf);
7424         i40e_clean_adminq_subtask(pf);
7425
7426         /* flush memory to make sure state is correct before next watchdog */
7427         smp_mb__before_atomic();
7428         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
7429
7430         /* If the tasks have taken longer than one timer cycle or there
7431          * is more work to be done, reschedule the service task now
7432          * rather than wait for the timer to tick again.
7433          */
7434         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
7435             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
7436             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
7437             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
7438                 i40e_service_event_schedule(pf);
7439 }
7440
7441 /**
7442  * i40e_service_timer - timer callback
7443  * @data: pointer to PF struct
7444  **/
7445 static void i40e_service_timer(unsigned long data)
7446 {
7447         struct i40e_pf *pf = (struct i40e_pf *)data;
7448
7449         mod_timer(&pf->service_timer,
7450                   round_jiffies(jiffies + pf->service_timer_period));
7451         i40e_service_event_schedule(pf);
7452 }
7453
7454 /**
7455  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
7456  * @vsi: the VSI being configured
7457  **/
7458 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
7459 {
7460         struct i40e_pf *pf = vsi->back;
7461
7462         switch (vsi->type) {
7463         case I40E_VSI_MAIN:
7464                 vsi->alloc_queue_pairs = pf->num_lan_qps;
7465                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7466                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7467                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
7468                         vsi->num_q_vectors = pf->num_lan_msix;
7469                 else
7470                         vsi->num_q_vectors = 1;
7471
7472                 break;
7473
7474         case I40E_VSI_FDIR:
7475                 vsi->alloc_queue_pairs = 1;
7476                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
7477                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7478                 vsi->num_q_vectors = pf->num_fdsb_msix;
7479                 break;
7480
7481         case I40E_VSI_VMDQ2:
7482                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
7483                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7484                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7485                 vsi->num_q_vectors = pf->num_vmdq_msix;
7486                 break;
7487
7488         case I40E_VSI_SRIOV:
7489                 vsi->alloc_queue_pairs = pf->num_vf_qps;
7490                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7491                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7492                 break;
7493
7494 #ifdef I40E_FCOE
7495         case I40E_VSI_FCOE:
7496                 vsi->alloc_queue_pairs = pf->num_fcoe_qps;
7497                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
7498                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
7499                 vsi->num_q_vectors = pf->num_fcoe_msix;
7500                 break;
7501
7502 #endif /* I40E_FCOE */
7503         default:
7504                 WARN_ON(1);
7505                 return -ENODATA;
7506         }
7507
7508         return 0;
7509 }
7510
7511 /**
7512  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
7513  * @type: VSI pointer
7514  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
7515  *
7516  * On error: returns error code (negative)
7517  * On success: returns 0
7518  **/
7519 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
7520 {
7521         int size;
7522         int ret = 0;
7523
7524         /* allocate memory for both Tx and Rx ring pointers */
7525         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
7526         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
7527         if (!vsi->tx_rings)
7528                 return -ENOMEM;
7529         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
7530
7531         if (alloc_qvectors) {
7532                 /* allocate memory for q_vector pointers */
7533                 size = sizeof(struct i40e_q_vector *) * vsi->num_q_vectors;
7534                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
7535                 if (!vsi->q_vectors) {
7536                         ret = -ENOMEM;
7537                         goto err_vectors;
7538                 }
7539         }
7540         return ret;
7541
7542 err_vectors:
7543         kfree(vsi->tx_rings);
7544         return ret;
7545 }
7546
7547 /**
7548  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
7549  * @pf: board private structure
7550  * @type: type of VSI
7551  *
7552  * On error: returns error code (negative)
7553  * On success: returns vsi index in PF (positive)
7554  **/
7555 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
7556 {
7557         int ret = -ENODEV;
7558         struct i40e_vsi *vsi;
7559         int vsi_idx;
7560         int i;
7561
7562         /* Need to protect the allocation of the VSIs at the PF level */
7563         mutex_lock(&pf->switch_mutex);
7564
7565         /* VSI list may be fragmented if VSI creation/destruction has
7566          * been happening.  We can afford to do a quick scan to look
7567          * for any free VSIs in the list.
7568          *
7569          * find next empty vsi slot, looping back around if necessary
7570          */
7571         i = pf->next_vsi;
7572         while (i < pf->num_alloc_vsi && pf->vsi[i])
7573                 i++;
7574         if (i >= pf->num_alloc_vsi) {
7575                 i = 0;
7576                 while (i < pf->next_vsi && pf->vsi[i])
7577                         i++;
7578         }
7579
7580         if (i < pf->num_alloc_vsi && !pf->vsi[i]) {
7581                 vsi_idx = i;             /* Found one! */
7582         } else {
7583                 ret = -ENODEV;
7584                 goto unlock_pf;  /* out of VSI slots! */
7585         }
7586         pf->next_vsi = ++i;
7587
7588         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
7589         if (!vsi) {
7590                 ret = -ENOMEM;
7591                 goto unlock_pf;
7592         }
7593         vsi->type = type;
7594         vsi->back = pf;
7595         set_bit(__I40E_DOWN, &vsi->state);
7596         vsi->flags = 0;
7597         vsi->idx = vsi_idx;
7598         vsi->int_rate_limit = 0;
7599         vsi->rss_table_size = (vsi->type == I40E_VSI_MAIN) ?
7600                                 pf->rss_table_size : 64;
7601         vsi->netdev_registered = false;
7602         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
7603         hash_init(vsi->mac_filter_hash);
7604         vsi->irqs_ready = false;
7605
7606         ret = i40e_set_num_rings_in_vsi(vsi);
7607         if (ret)
7608                 goto err_rings;
7609
7610         ret = i40e_vsi_alloc_arrays(vsi, true);
7611         if (ret)
7612                 goto err_rings;
7613
7614         /* Setup default MSIX irq handler for VSI */
7615         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
7616
7617         /* Initialize VSI lock */
7618         spin_lock_init(&vsi->mac_filter_hash_lock);
7619         pf->vsi[vsi_idx] = vsi;
7620         ret = vsi_idx;
7621         goto unlock_pf;
7622
7623 err_rings:
7624         pf->next_vsi = i - 1;
7625         kfree(vsi);
7626 unlock_pf:
7627         mutex_unlock(&pf->switch_mutex);
7628         return ret;
7629 }
7630
7631 /**
7632  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
7633  * @type: VSI pointer
7634  * @free_qvectors: a bool to specify if q_vectors need to be freed.
7635  *
7636  * On error: returns error code (negative)
7637  * On success: returns 0
7638  **/
7639 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
7640 {
7641         /* free the ring and vector containers */
7642         if (free_qvectors) {
7643                 kfree(vsi->q_vectors);
7644                 vsi->q_vectors = NULL;
7645         }
7646         kfree(vsi->tx_rings);
7647         vsi->tx_rings = NULL;
7648         vsi->rx_rings = NULL;
7649 }
7650
7651 /**
7652  * i40e_clear_rss_config_user - clear the user configured RSS hash keys
7653  * and lookup table
7654  * @vsi: Pointer to VSI structure
7655  */
7656 static void i40e_clear_rss_config_user(struct i40e_vsi *vsi)
7657 {
7658         if (!vsi)
7659                 return;
7660
7661         kfree(vsi->rss_hkey_user);
7662         vsi->rss_hkey_user = NULL;
7663
7664         kfree(vsi->rss_lut_user);
7665         vsi->rss_lut_user = NULL;
7666 }
7667
7668 /**
7669  * i40e_vsi_clear - Deallocate the VSI provided
7670  * @vsi: the VSI being un-configured
7671  **/
7672 static int i40e_vsi_clear(struct i40e_vsi *vsi)
7673 {
7674         struct i40e_pf *pf;
7675
7676         if (!vsi)
7677                 return 0;
7678
7679         if (!vsi->back)
7680                 goto free_vsi;
7681         pf = vsi->back;
7682
7683         mutex_lock(&pf->switch_mutex);
7684         if (!pf->vsi[vsi->idx]) {
7685                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
7686                         vsi->idx, vsi->idx, vsi, vsi->type);
7687                 goto unlock_vsi;
7688         }
7689
7690         if (pf->vsi[vsi->idx] != vsi) {
7691                 dev_err(&pf->pdev->dev,
7692                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
7693                         pf->vsi[vsi->idx]->idx,
7694                         pf->vsi[vsi->idx],
7695                         pf->vsi[vsi->idx]->type,
7696                         vsi->idx, vsi, vsi->type);
7697                 goto unlock_vsi;
7698         }
7699
7700         /* updates the PF for this cleared vsi */
7701         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
7702         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
7703
7704         i40e_vsi_free_arrays(vsi, true);
7705         i40e_clear_rss_config_user(vsi);
7706
7707         pf->vsi[vsi->idx] = NULL;
7708         if (vsi->idx < pf->next_vsi)
7709                 pf->next_vsi = vsi->idx;
7710
7711 unlock_vsi:
7712         mutex_unlock(&pf->switch_mutex);
7713 free_vsi:
7714         kfree(vsi);
7715
7716         return 0;
7717 }
7718
7719 /**
7720  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
7721  * @vsi: the VSI being cleaned
7722  **/
7723 static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
7724 {
7725         int i;
7726
7727         if (vsi->tx_rings && vsi->tx_rings[0]) {
7728                 for (i = 0; i < vsi->alloc_queue_pairs; i++) {
7729                         kfree_rcu(vsi->tx_rings[i], rcu);
7730                         vsi->tx_rings[i] = NULL;
7731                         vsi->rx_rings[i] = NULL;
7732                 }
7733         }
7734 }
7735
7736 /**
7737  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
7738  * @vsi: the VSI being configured
7739  **/
7740 static int i40e_alloc_rings(struct i40e_vsi *vsi)
7741 {
7742         struct i40e_ring *tx_ring, *rx_ring;
7743         struct i40e_pf *pf = vsi->back;
7744         int i;
7745
7746         /* Set basic values in the rings to be used later during open() */
7747         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
7748                 /* allocate space for both Tx and Rx in one shot */
7749                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
7750                 if (!tx_ring)
7751                         goto err_out;
7752
7753                 tx_ring->queue_index = i;
7754                 tx_ring->reg_idx = vsi->base_queue + i;
7755                 tx_ring->ring_active = false;
7756                 tx_ring->vsi = vsi;
7757                 tx_ring->netdev = vsi->netdev;
7758                 tx_ring->dev = &pf->pdev->dev;
7759                 tx_ring->count = vsi->num_desc;
7760                 tx_ring->size = 0;
7761                 tx_ring->dcb_tc = 0;
7762                 if (vsi->back->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
7763                         tx_ring->flags = I40E_TXR_FLAGS_WB_ON_ITR;
7764                 tx_ring->tx_itr_setting = pf->tx_itr_default;
7765                 vsi->tx_rings[i] = tx_ring;
7766
7767                 rx_ring = &tx_ring[1];
7768                 rx_ring->queue_index = i;
7769                 rx_ring->reg_idx = vsi->base_queue + i;
7770                 rx_ring->ring_active = false;
7771                 rx_ring->vsi = vsi;
7772                 rx_ring->netdev = vsi->netdev;
7773                 rx_ring->dev = &pf->pdev->dev;
7774                 rx_ring->count = vsi->num_desc;
7775                 rx_ring->size = 0;
7776                 rx_ring->dcb_tc = 0;
7777                 rx_ring->rx_itr_setting = pf->rx_itr_default;
7778                 vsi->rx_rings[i] = rx_ring;
7779         }
7780
7781         return 0;
7782
7783 err_out:
7784         i40e_vsi_clear_rings(vsi);
7785         return -ENOMEM;
7786 }
7787
7788 /**
7789  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
7790  * @pf: board private structure
7791  * @vectors: the number of MSI-X vectors to request
7792  *
7793  * Returns the number of vectors reserved, or error
7794  **/
7795 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
7796 {
7797         vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
7798                                         I40E_MIN_MSIX, vectors);
7799         if (vectors < 0) {
7800                 dev_info(&pf->pdev->dev,
7801                          "MSI-X vector reservation failed: %d\n", vectors);
7802                 vectors = 0;
7803         }
7804
7805         return vectors;
7806 }
7807
7808 /**
7809  * i40e_init_msix - Setup the MSIX capability
7810  * @pf: board private structure
7811  *
7812  * Work with the OS to set up the MSIX vectors needed.
7813  *
7814  * Returns the number of vectors reserved or negative on failure
7815  **/
7816 static int i40e_init_msix(struct i40e_pf *pf)
7817 {
7818         struct i40e_hw *hw = &pf->hw;
7819         int cpus, extra_vectors;
7820         int vectors_left;
7821         int v_budget, i;
7822         int v_actual;
7823         int iwarp_requested = 0;
7824
7825         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
7826                 return -ENODEV;
7827
7828         /* The number of vectors we'll request will be comprised of:
7829          *   - Add 1 for "other" cause for Admin Queue events, etc.
7830          *   - The number of LAN queue pairs
7831          *      - Queues being used for RSS.
7832          *              We don't need as many as max_rss_size vectors.
7833          *              use rss_size instead in the calculation since that
7834          *              is governed by number of cpus in the system.
7835          *      - assumes symmetric Tx/Rx pairing
7836          *   - The number of VMDq pairs
7837          *   - The CPU count within the NUMA node if iWARP is enabled
7838 #ifdef I40E_FCOE
7839          *   - The number of FCOE qps.
7840 #endif
7841          * Once we count this up, try the request.
7842          *
7843          * If we can't get what we want, we'll simplify to nearly nothing
7844          * and try again.  If that still fails, we punt.
7845          */
7846         vectors_left = hw->func_caps.num_msix_vectors;
7847         v_budget = 0;
7848
7849         /* reserve one vector for miscellaneous handler */
7850         if (vectors_left) {
7851                 v_budget++;
7852                 vectors_left--;
7853         }
7854
7855         /* reserve some vectors for the main PF traffic queues. Initially we
7856          * only reserve at most 50% of the available vectors, in the case that
7857          * the number of online CPUs is large. This ensures that we can enable
7858          * extra features as well. Once we've enabled the other features, we
7859          * will use any remaining vectors to reach as close as we can to the
7860          * number of online CPUs.
7861          */
7862         cpus = num_online_cpus();
7863         pf->num_lan_msix = min_t(int, cpus, vectors_left / 2);
7864         vectors_left -= pf->num_lan_msix;
7865
7866         /* reserve one vector for sideband flow director */
7867         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
7868                 if (vectors_left) {
7869                         pf->num_fdsb_msix = 1;
7870                         v_budget++;
7871                         vectors_left--;
7872                 } else {
7873                         pf->num_fdsb_msix = 0;
7874                 }
7875         }
7876
7877 #ifdef I40E_FCOE
7878         /* can we reserve enough for FCoE? */
7879         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
7880                 if (!vectors_left)
7881                         pf->num_fcoe_msix = 0;
7882                 else if (vectors_left >= pf->num_fcoe_qps)
7883                         pf->num_fcoe_msix = pf->num_fcoe_qps;
7884                 else
7885                         pf->num_fcoe_msix = 1;
7886                 v_budget += pf->num_fcoe_msix;
7887                 vectors_left -= pf->num_fcoe_msix;
7888         }
7889
7890 #endif
7891         /* can we reserve enough for iWARP? */
7892         if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
7893                 iwarp_requested = pf->num_iwarp_msix;
7894
7895                 if (!vectors_left)
7896                         pf->num_iwarp_msix = 0;
7897                 else if (vectors_left < pf->num_iwarp_msix)
7898                         pf->num_iwarp_msix = 1;
7899                 v_budget += pf->num_iwarp_msix;
7900                 vectors_left -= pf->num_iwarp_msix;
7901         }
7902
7903         /* any vectors left over go for VMDq support */
7904         if (pf->flags & I40E_FLAG_VMDQ_ENABLED) {
7905                 int vmdq_vecs_wanted = pf->num_vmdq_vsis * pf->num_vmdq_qps;
7906                 int vmdq_vecs = min_t(int, vectors_left, vmdq_vecs_wanted);
7907
7908                 if (!vectors_left) {
7909                         pf->num_vmdq_msix = 0;
7910                         pf->num_vmdq_qps = 0;
7911                 } else {
7912                         /* if we're short on vectors for what's desired, we limit
7913                          * the queues per vmdq.  If this is still more than are
7914                          * available, the user will need to change the number of
7915                          * queues/vectors used by the PF later with the ethtool
7916                          * channels command
7917                          */
7918                         if (vmdq_vecs < vmdq_vecs_wanted)
7919                                 pf->num_vmdq_qps = 1;
7920                         pf->num_vmdq_msix = pf->num_vmdq_qps;
7921
7922                         v_budget += vmdq_vecs;
7923                         vectors_left -= vmdq_vecs;
7924                 }
7925         }
7926
7927         /* On systems with a large number of SMP cores, we previously limited
7928          * the number of vectors for num_lan_msix to be at most 50% of the
7929          * available vectors, to allow for other features. Now, we add back
7930          * the remaining vectors. However, we ensure that the total
7931          * num_lan_msix will not exceed num_online_cpus(). To do this, we
7932          * calculate the number of vectors we can add without going over the
7933          * cap of CPUs. For systems with a small number of CPUs this will be
7934          * zero.
7935          */
7936         extra_vectors = min_t(int, cpus - pf->num_lan_msix, vectors_left);
7937         pf->num_lan_msix += extra_vectors;
7938         vectors_left -= extra_vectors;
7939
7940         WARN(vectors_left < 0,
7941              "Calculation of remaining vectors underflowed. This is an accounting bug when determining total MSI-X vectors.\n");
7942
7943         v_budget += pf->num_lan_msix;
7944         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
7945                                    GFP_KERNEL);
7946         if (!pf->msix_entries)
7947                 return -ENOMEM;
7948
7949         for (i = 0; i < v_budget; i++)
7950                 pf->msix_entries[i].entry = i;
7951         v_actual = i40e_reserve_msix_vectors(pf, v_budget);
7952
7953         if (v_actual < I40E_MIN_MSIX) {
7954                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
7955                 kfree(pf->msix_entries);
7956                 pf->msix_entries = NULL;
7957                 pci_disable_msix(pf->pdev);
7958                 return -ENODEV;
7959
7960         } else if (v_actual == I40E_MIN_MSIX) {
7961                 /* Adjust for minimal MSIX use */
7962                 pf->num_vmdq_vsis = 0;
7963                 pf->num_vmdq_qps = 0;
7964                 pf->num_lan_qps = 1;
7965                 pf->num_lan_msix = 1;
7966
7967         } else if (!vectors_left) {
7968                 /* If we have limited resources, we will start with no vectors
7969                  * for the special features and then allocate vectors to some
7970                  * of these features based on the policy and at the end disable
7971                  * the features that did not get any vectors.
7972                  */
7973                 int vec;
7974
7975                 dev_info(&pf->pdev->dev,
7976                          "MSI-X vector limit reached, attempting to redistribute vectors\n");
7977                 /* reserve the misc vector */
7978                 vec = v_actual - 1;
7979
7980                 /* Scale vector usage down */
7981                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
7982                 pf->num_vmdq_vsis = 1;
7983                 pf->num_vmdq_qps = 1;
7984 #ifdef I40E_FCOE
7985                 pf->num_fcoe_qps = 0;
7986                 pf->num_fcoe_msix = 0;
7987 #endif
7988
7989                 /* partition out the remaining vectors */
7990                 switch (vec) {
7991                 case 2:
7992                         pf->num_lan_msix = 1;
7993                         break;
7994                 case 3:
7995                         if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
7996                                 pf->num_lan_msix = 1;
7997                                 pf->num_iwarp_msix = 1;
7998                         } else {
7999                                 pf->num_lan_msix = 2;
8000                         }
8001 #ifdef I40E_FCOE
8002                         /* give one vector to FCoE */
8003                         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
8004                                 pf->num_lan_msix = 1;
8005                                 pf->num_fcoe_msix = 1;
8006                         }
8007 #endif
8008                         break;
8009                 default:
8010                         if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
8011                                 pf->num_iwarp_msix = min_t(int, (vec / 3),
8012                                                  iwarp_requested);
8013                                 pf->num_vmdq_vsis = min_t(int, (vec / 3),
8014                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
8015                         } else {
8016                                 pf->num_vmdq_vsis = min_t(int, (vec / 2),
8017                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
8018                         }
8019                         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
8020                                 pf->num_fdsb_msix = 1;
8021                                 vec--;
8022                         }
8023                         pf->num_lan_msix = min_t(int,
8024                                (vec - (pf->num_iwarp_msix + pf->num_vmdq_vsis)),
8025                                                               pf->num_lan_msix);
8026                         pf->num_lan_qps = pf->num_lan_msix;
8027 #ifdef I40E_FCOE
8028                         /* give one vector to FCoE */
8029                         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
8030                                 pf->num_fcoe_msix = 1;
8031                                 vec--;
8032                         }
8033 #endif
8034                         break;
8035                 }
8036         }
8037
8038         if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
8039             (pf->num_fdsb_msix == 0)) {
8040                 dev_info(&pf->pdev->dev, "Sideband Flowdir disabled, not enough MSI-X vectors\n");
8041                 pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
8042         }
8043         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
8044             (pf->num_vmdq_msix == 0)) {
8045                 dev_info(&pf->pdev->dev, "VMDq disabled, not enough MSI-X vectors\n");
8046                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
8047         }
8048
8049         if ((pf->flags & I40E_FLAG_IWARP_ENABLED) &&
8050             (pf->num_iwarp_msix == 0)) {
8051                 dev_info(&pf->pdev->dev, "IWARP disabled, not enough MSI-X vectors\n");
8052                 pf->flags &= ~I40E_FLAG_IWARP_ENABLED;
8053         }
8054 #ifdef I40E_FCOE
8055
8056         if ((pf->flags & I40E_FLAG_FCOE_ENABLED) && (pf->num_fcoe_msix == 0)) {
8057                 dev_info(&pf->pdev->dev, "FCOE disabled, not enough MSI-X vectors\n");
8058                 pf->flags &= ~I40E_FLAG_FCOE_ENABLED;
8059         }
8060 #endif
8061         i40e_debug(&pf->hw, I40E_DEBUG_INIT,
8062                    "MSI-X vector distribution: PF %d, VMDq %d, FDSB %d, iWARP %d\n",
8063                    pf->num_lan_msix,
8064                    pf->num_vmdq_msix * pf->num_vmdq_vsis,
8065                    pf->num_fdsb_msix,
8066                    pf->num_iwarp_msix);
8067
8068         return v_actual;
8069 }
8070
8071 /**
8072  * i40e_vsi_alloc_q_vector - Allocate memory for a single interrupt vector
8073  * @vsi: the VSI being configured
8074  * @v_idx: index of the vector in the vsi struct
8075  * @cpu: cpu to be used on affinity_mask
8076  *
8077  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
8078  **/
8079 static int i40e_vsi_alloc_q_vector(struct i40e_vsi *vsi, int v_idx, int cpu)
8080 {
8081         struct i40e_q_vector *q_vector;
8082
8083         /* allocate q_vector */
8084         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
8085         if (!q_vector)
8086                 return -ENOMEM;
8087
8088         q_vector->vsi = vsi;
8089         q_vector->v_idx = v_idx;
8090         cpumask_set_cpu(cpu, &q_vector->affinity_mask);
8091
8092         if (vsi->netdev)
8093                 netif_napi_add(vsi->netdev, &q_vector->napi,
8094                                i40e_napi_poll, NAPI_POLL_WEIGHT);
8095
8096         q_vector->rx.latency_range = I40E_LOW_LATENCY;
8097         q_vector->tx.latency_range = I40E_LOW_LATENCY;
8098
8099         /* tie q_vector and vsi together */
8100         vsi->q_vectors[v_idx] = q_vector;
8101
8102         return 0;
8103 }
8104
8105 /**
8106  * i40e_vsi_alloc_q_vectors - Allocate memory for interrupt vectors
8107  * @vsi: the VSI being configured
8108  *
8109  * We allocate one q_vector per queue interrupt.  If allocation fails we
8110  * return -ENOMEM.
8111  **/
8112 static int i40e_vsi_alloc_q_vectors(struct i40e_vsi *vsi)
8113 {
8114         struct i40e_pf *pf = vsi->back;
8115         int err, v_idx, num_q_vectors, current_cpu;
8116
8117         /* if not MSIX, give the one vector only to the LAN VSI */
8118         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
8119                 num_q_vectors = vsi->num_q_vectors;
8120         else if (vsi == pf->vsi[pf->lan_vsi])
8121                 num_q_vectors = 1;
8122         else
8123                 return -EINVAL;
8124
8125         current_cpu = cpumask_first(cpu_online_mask);
8126
8127         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
8128                 err = i40e_vsi_alloc_q_vector(vsi, v_idx, current_cpu);
8129                 if (err)
8130                         goto err_out;
8131                 current_cpu = cpumask_next(current_cpu, cpu_online_mask);
8132                 if (unlikely(current_cpu >= nr_cpu_ids))
8133                         current_cpu = cpumask_first(cpu_online_mask);
8134         }
8135
8136         return 0;
8137
8138 err_out:
8139         while (v_idx--)
8140                 i40e_free_q_vector(vsi, v_idx);
8141
8142         return err;
8143 }
8144
8145 /**
8146  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
8147  * @pf: board private structure to initialize
8148  **/
8149 static int i40e_init_interrupt_scheme(struct i40e_pf *pf)
8150 {
8151         int vectors = 0;
8152         ssize_t size;
8153
8154         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
8155                 vectors = i40e_init_msix(pf);
8156                 if (vectors < 0) {
8157                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED   |
8158                                        I40E_FLAG_IWARP_ENABLED  |
8159 #ifdef I40E_FCOE
8160                                        I40E_FLAG_FCOE_ENABLED   |
8161 #endif
8162                                        I40E_FLAG_RSS_ENABLED    |
8163                                        I40E_FLAG_DCB_CAPABLE    |
8164                                        I40E_FLAG_DCB_ENABLED    |
8165                                        I40E_FLAG_SRIOV_ENABLED  |
8166                                        I40E_FLAG_FD_SB_ENABLED  |
8167                                        I40E_FLAG_FD_ATR_ENABLED |
8168                                        I40E_FLAG_VMDQ_ENABLED);
8169
8170                         /* rework the queue expectations without MSIX */
8171                         i40e_determine_queue_usage(pf);
8172                 }
8173         }
8174
8175         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
8176             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
8177                 dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
8178                 vectors = pci_enable_msi(pf->pdev);
8179                 if (vectors < 0) {
8180                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n",
8181                                  vectors);
8182                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
8183                 }
8184                 vectors = 1;  /* one MSI or Legacy vector */
8185         }
8186
8187         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
8188                 dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");
8189
8190         /* set up vector assignment tracking */
8191         size = sizeof(struct i40e_lump_tracking) + (sizeof(u16) * vectors);
8192         pf->irq_pile = kzalloc(size, GFP_KERNEL);
8193         if (!pf->irq_pile) {
8194                 dev_err(&pf->pdev->dev, "error allocating irq_pile memory\n");
8195                 return -ENOMEM;
8196         }
8197         pf->irq_pile->num_entries = vectors;
8198         pf->irq_pile->search_hint = 0;
8199
8200         /* track first vector for misc interrupts, ignore return */
8201         (void)i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT - 1);
8202
8203         return 0;
8204 }
8205
8206 /**
8207  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
8208  * @pf: board private structure
8209  *
8210  * This sets up the handler for MSIX 0, which is used to manage the
8211  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
8212  * when in MSI or Legacy interrupt mode.
8213  **/
8214 static int i40e_setup_misc_vector(struct i40e_pf *pf)
8215 {
8216         struct i40e_hw *hw = &pf->hw;
8217         int err = 0;
8218
8219         /* Only request the irq if this is the first time through, and
8220          * not when we're rebuilding after a Reset
8221          */
8222         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
8223                 err = request_irq(pf->msix_entries[0].vector,
8224                                   i40e_intr, 0, pf->int_name, pf);
8225                 if (err) {
8226                         dev_info(&pf->pdev->dev,
8227                                  "request_irq for %s failed: %d\n",
8228                                  pf->int_name, err);
8229                         return -EFAULT;
8230                 }
8231         }
8232
8233         i40e_enable_misc_int_causes(pf);
8234
8235         /* associate no queues to the misc vector */
8236         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
8237         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
8238
8239         i40e_flush(hw);
8240
8241         i40e_irq_dynamic_enable_icr0(pf, true);
8242
8243         return err;
8244 }
8245
8246 /**
8247  * i40e_config_rss_aq - Prepare for RSS using AQ commands
8248  * @vsi: vsi structure
8249  * @seed: RSS hash seed
8250  **/
8251 static int i40e_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
8252                               u8 *lut, u16 lut_size)
8253 {
8254         struct i40e_pf *pf = vsi->back;
8255         struct i40e_hw *hw = &pf->hw;
8256         int ret = 0;
8257
8258         if (seed) {
8259                 struct i40e_aqc_get_set_rss_key_data *seed_dw =
8260                         (struct i40e_aqc_get_set_rss_key_data *)seed;
8261                 ret = i40e_aq_set_rss_key(hw, vsi->id, seed_dw);
8262                 if (ret) {
8263                         dev_info(&pf->pdev->dev,
8264                                  "Cannot set RSS key, err %s aq_err %s\n",
8265                                  i40e_stat_str(hw, ret),
8266                                  i40e_aq_str(hw, hw->aq.asq_last_status));
8267                         return ret;
8268                 }
8269         }
8270         if (lut) {
8271                 bool pf_lut = vsi->type == I40E_VSI_MAIN ? true : false;
8272
8273                 ret = i40e_aq_set_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
8274                 if (ret) {
8275                         dev_info(&pf->pdev->dev,
8276                                  "Cannot set RSS lut, err %s aq_err %s\n",
8277                                  i40e_stat_str(hw, ret),
8278                                  i40e_aq_str(hw, hw->aq.asq_last_status));
8279                         return ret;
8280                 }
8281         }
8282         return ret;
8283 }
8284
8285 /**
8286  * i40e_get_rss_aq - Get RSS keys and lut by using AQ commands
8287  * @vsi: Pointer to vsi structure
8288  * @seed: Buffter to store the hash keys
8289  * @lut: Buffer to store the lookup table entries
8290  * @lut_size: Size of buffer to store the lookup table entries
8291  *
8292  * Return 0 on success, negative on failure
8293  */
8294 static int i40e_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
8295                            u8 *lut, u16 lut_size)
8296 {
8297         struct i40e_pf *pf = vsi->back;
8298         struct i40e_hw *hw = &pf->hw;
8299         int ret = 0;
8300
8301         if (seed) {
8302                 ret = i40e_aq_get_rss_key(hw, vsi->id,
8303                         (struct i40e_aqc_get_set_rss_key_data *)seed);
8304                 if (ret) {
8305                         dev_info(&pf->pdev->dev,
8306                                  "Cannot get RSS key, err %s aq_err %s\n",
8307                                  i40e_stat_str(&pf->hw, ret),
8308                                  i40e_aq_str(&pf->hw,
8309                                              pf->hw.aq.asq_last_status));
8310                         return ret;
8311                 }
8312         }
8313
8314         if (lut) {
8315                 bool pf_lut = vsi->type == I40E_VSI_MAIN ? true : false;
8316
8317                 ret = i40e_aq_get_rss_lut(hw, vsi->id, pf_lut, lut, lut_size);
8318                 if (ret) {
8319                         dev_info(&pf->pdev->dev,
8320                                  "Cannot get RSS lut, err %s aq_err %s\n",
8321                                  i40e_stat_str(&pf->hw, ret),
8322                                  i40e_aq_str(&pf->hw,
8323                                              pf->hw.aq.asq_last_status));
8324                         return ret;
8325                 }
8326         }
8327
8328         return ret;
8329 }
8330
8331 /**
8332  * i40e_vsi_config_rss - Prepare for VSI(VMDq) RSS if used
8333  * @vsi: VSI structure
8334  **/
8335 static int i40e_vsi_config_rss(struct i40e_vsi *vsi)
8336 {
8337         u8 seed[I40E_HKEY_ARRAY_SIZE];
8338         struct i40e_pf *pf = vsi->back;
8339         u8 *lut;
8340         int ret;
8341
8342         if (!(pf->flags & I40E_FLAG_RSS_AQ_CAPABLE))
8343                 return 0;
8344
8345         if (!vsi->rss_size)
8346                 vsi->rss_size = min_t(int, pf->alloc_rss_size,
8347                                       vsi->num_queue_pairs);
8348         if (!vsi->rss_size)
8349                 return -EINVAL;
8350
8351         lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
8352         if (!lut)
8353                 return -ENOMEM;
8354         /* Use the user configured hash keys and lookup table if there is one,
8355          * otherwise use default
8356          */
8357         if (vsi->rss_lut_user)
8358                 memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
8359         else
8360                 i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
8361         if (vsi->rss_hkey_user)
8362                 memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
8363         else
8364                 netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
8365         ret = i40e_config_rss_aq(vsi, seed, lut, vsi->rss_table_size);
8366         kfree(lut);
8367
8368         return ret;
8369 }
8370
8371 /**
8372  * i40e_config_rss_reg - Configure RSS keys and lut by writing registers
8373  * @vsi: Pointer to vsi structure
8374  * @seed: RSS hash seed
8375  * @lut: Lookup table
8376  * @lut_size: Lookup table size
8377  *
8378  * Returns 0 on success, negative on failure
8379  **/
8380 static int i40e_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
8381                                const u8 *lut, u16 lut_size)
8382 {
8383         struct i40e_pf *pf = vsi->back;
8384         struct i40e_hw *hw = &pf->hw;
8385         u16 vf_id = vsi->vf_id;
8386         u8 i;
8387
8388         /* Fill out hash function seed */
8389         if (seed) {
8390                 u32 *seed_dw = (u32 *)seed;
8391
8392                 if (vsi->type == I40E_VSI_MAIN) {
8393                         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
8394                                 wr32(hw, I40E_PFQF_HKEY(i), seed_dw[i]);
8395                 } else if (vsi->type == I40E_VSI_SRIOV) {
8396                         for (i = 0; i <= I40E_VFQF_HKEY1_MAX_INDEX; i++)
8397                                 wr32(hw, I40E_VFQF_HKEY1(i, vf_id), seed_dw[i]);
8398                 } else {
8399                         dev_err(&pf->pdev->dev, "Cannot set RSS seed - invalid VSI type\n");
8400                 }
8401         }
8402
8403         if (lut) {
8404                 u32 *lut_dw = (u32 *)lut;
8405
8406                 if (vsi->type == I40E_VSI_MAIN) {
8407                         if (lut_size != I40E_HLUT_ARRAY_SIZE)
8408                                 return -EINVAL;
8409                         for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
8410                                 wr32(hw, I40E_PFQF_HLUT(i), lut_dw[i]);
8411                 } else if (vsi->type == I40E_VSI_SRIOV) {
8412                         if (lut_size != I40E_VF_HLUT_ARRAY_SIZE)
8413                                 return -EINVAL;
8414                         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
8415                                 wr32(hw, I40E_VFQF_HLUT1(i, vf_id), lut_dw[i]);
8416                 } else {
8417                         dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
8418                 }
8419         }
8420         i40e_flush(hw);
8421
8422         return 0;
8423 }
8424
8425 /**
8426  * i40e_get_rss_reg - Get the RSS keys and lut by reading registers
8427  * @vsi: Pointer to VSI structure
8428  * @seed: Buffer to store the keys
8429  * @lut: Buffer to store the lookup table entries
8430  * @lut_size: Size of buffer to store the lookup table entries
8431  *
8432  * Returns 0 on success, negative on failure
8433  */
8434 static int i40e_get_rss_reg(struct i40e_vsi *vsi, u8 *seed,
8435                             u8 *lut, u16 lut_size)
8436 {
8437         struct i40e_pf *pf = vsi->back;
8438         struct i40e_hw *hw = &pf->hw;
8439         u16 i;
8440
8441         if (seed) {
8442                 u32 *seed_dw = (u32 *)seed;
8443
8444                 for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
8445                         seed_dw[i] = i40e_read_rx_ctl(hw, I40E_PFQF_HKEY(i));
8446         }
8447         if (lut) {
8448                 u32 *lut_dw = (u32 *)lut;
8449
8450                 if (lut_size != I40E_HLUT_ARRAY_SIZE)
8451                         return -EINVAL;
8452                 for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
8453                         lut_dw[i] = rd32(hw, I40E_PFQF_HLUT(i));
8454         }
8455
8456         return 0;
8457 }
8458
8459 /**
8460  * i40e_config_rss - Configure RSS keys and lut
8461  * @vsi: Pointer to VSI structure
8462  * @seed: RSS hash seed
8463  * @lut: Lookup table
8464  * @lut_size: Lookup table size
8465  *
8466  * Returns 0 on success, negative on failure
8467  */
8468 int i40e_config_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
8469 {
8470         struct i40e_pf *pf = vsi->back;
8471
8472         if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE)
8473                 return i40e_config_rss_aq(vsi, seed, lut, lut_size);
8474         else
8475                 return i40e_config_rss_reg(vsi, seed, lut, lut_size);
8476 }
8477
8478 /**
8479  * i40e_get_rss - Get RSS keys and lut
8480  * @vsi: Pointer to VSI structure
8481  * @seed: Buffer to store the keys
8482  * @lut: Buffer to store the lookup table entries
8483  * lut_size: Size of buffer to store the lookup table entries
8484  *
8485  * Returns 0 on success, negative on failure
8486  */
8487 int i40e_get_rss(struct i40e_vsi *vsi, u8 *seed, u8 *lut, u16 lut_size)
8488 {
8489         struct i40e_pf *pf = vsi->back;
8490
8491         if (pf->flags & I40E_FLAG_RSS_AQ_CAPABLE)
8492                 return i40e_get_rss_aq(vsi, seed, lut, lut_size);
8493         else
8494                 return i40e_get_rss_reg(vsi, seed, lut, lut_size);
8495 }
8496
8497 /**
8498  * i40e_fill_rss_lut - Fill the RSS lookup table with default values
8499  * @pf: Pointer to board private structure
8500  * @lut: Lookup table
8501  * @rss_table_size: Lookup table size
8502  * @rss_size: Range of queue number for hashing
8503  */
8504 void i40e_fill_rss_lut(struct i40e_pf *pf, u8 *lut,
8505                        u16 rss_table_size, u16 rss_size)
8506 {
8507         u16 i;
8508
8509         for (i = 0; i < rss_table_size; i++)
8510                 lut[i] = i % rss_size;
8511 }
8512
8513 /**
8514  * i40e_pf_config_rss - Prepare for RSS if used
8515  * @pf: board private structure
8516  **/
8517 static int i40e_pf_config_rss(struct i40e_pf *pf)
8518 {
8519         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
8520         u8 seed[I40E_HKEY_ARRAY_SIZE];
8521         u8 *lut;
8522         struct i40e_hw *hw = &pf->hw;
8523         u32 reg_val;
8524         u64 hena;
8525         int ret;
8526
8527         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
8528         hena = (u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(0)) |
8529                 ((u64)i40e_read_rx_ctl(hw, I40E_PFQF_HENA(1)) << 32);
8530         hena |= i40e_pf_get_default_rss_hena(pf);
8531
8532         i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), (u32)hena);
8533         i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
8534
8535         /* Determine the RSS table size based on the hardware capabilities */
8536         reg_val = i40e_read_rx_ctl(hw, I40E_PFQF_CTL_0);
8537         reg_val = (pf->rss_table_size == 512) ?
8538                         (reg_val | I40E_PFQF_CTL_0_HASHLUTSIZE_512) :
8539                         (reg_val & ~I40E_PFQF_CTL_0_HASHLUTSIZE_512);
8540         i40e_write_rx_ctl(hw, I40E_PFQF_CTL_0, reg_val);
8541
8542         /* Determine the RSS size of the VSI */
8543         if (!vsi->rss_size)
8544                 vsi->rss_size = min_t(int, pf->alloc_rss_size,
8545                                       vsi->num_queue_pairs);
8546         if (!vsi->rss_size)
8547                 return -EINVAL;
8548
8549         lut = kzalloc(vsi->rss_table_size, GFP_KERNEL);
8550         if (!lut)
8551                 return -ENOMEM;
8552
8553         /* Use user configured lut if there is one, otherwise use default */
8554         if (vsi->rss_lut_user)
8555                 memcpy(lut, vsi->rss_lut_user, vsi->rss_table_size);
8556         else
8557                 i40e_fill_rss_lut(pf, lut, vsi->rss_table_size, vsi->rss_size);
8558
8559         /* Use user configured hash key if there is one, otherwise
8560          * use default.
8561          */
8562         if (vsi->rss_hkey_user)
8563                 memcpy(seed, vsi->rss_hkey_user, I40E_HKEY_ARRAY_SIZE);
8564         else
8565                 netdev_rss_key_fill((void *)seed, I40E_HKEY_ARRAY_SIZE);
8566         ret = i40e_config_rss(vsi, seed, lut, vsi->rss_table_size);
8567         kfree(lut);
8568
8569         return ret;
8570 }
8571
8572 /**
8573  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
8574  * @pf: board private structure
8575  * @queue_count: the requested queue count for rss.
8576  *
8577  * returns 0 if rss is not enabled, if enabled returns the final rss queue
8578  * count which may be different from the requested queue count.
8579  **/
8580 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
8581 {
8582         struct i40e_vsi *vsi = pf->vsi[pf->lan_vsi];
8583         int new_rss_size;
8584
8585         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
8586                 return 0;
8587
8588         new_rss_size = min_t(int, queue_count, pf->rss_size_max);
8589
8590         if (queue_count != vsi->num_queue_pairs) {
8591                 vsi->req_queue_pairs = queue_count;
8592                 i40e_prep_for_reset(pf);
8593
8594                 pf->alloc_rss_size = new_rss_size;
8595
8596                 i40e_reset_and_rebuild(pf, true);
8597
8598                 /* Discard the user configured hash keys and lut, if less
8599                  * queues are enabled.
8600                  */
8601                 if (queue_count < vsi->rss_size) {
8602                         i40e_clear_rss_config_user(vsi);
8603                         dev_dbg(&pf->pdev->dev,
8604                                 "discard user configured hash keys and lut\n");
8605                 }
8606
8607                 /* Reset vsi->rss_size, as number of enabled queues changed */
8608                 vsi->rss_size = min_t(int, pf->alloc_rss_size,
8609                                       vsi->num_queue_pairs);
8610
8611                 i40e_pf_config_rss(pf);
8612         }
8613         dev_info(&pf->pdev->dev, "User requested queue count/HW max RSS count:  %d/%d\n",
8614                  vsi->req_queue_pairs, pf->rss_size_max);
8615         return pf->alloc_rss_size;
8616 }
8617
8618 /**
8619  * i40e_get_npar_bw_setting - Retrieve BW settings for this PF partition
8620  * @pf: board private structure
8621  **/
8622 i40e_status i40e_get_npar_bw_setting(struct i40e_pf *pf)
8623 {
8624         i40e_status status;
8625         bool min_valid, max_valid;
8626         u32 max_bw, min_bw;
8627
8628         status = i40e_read_bw_from_alt_ram(&pf->hw, &max_bw, &min_bw,
8629                                            &min_valid, &max_valid);
8630
8631         if (!status) {
8632                 if (min_valid)
8633                         pf->npar_min_bw = min_bw;
8634                 if (max_valid)
8635                         pf->npar_max_bw = max_bw;
8636         }
8637
8638         return status;
8639 }
8640
8641 /**
8642  * i40e_set_npar_bw_setting - Set BW settings for this PF partition
8643  * @pf: board private structure
8644  **/
8645 i40e_status i40e_set_npar_bw_setting(struct i40e_pf *pf)
8646 {
8647         struct i40e_aqc_configure_partition_bw_data bw_data;
8648         i40e_status status;
8649
8650         /* Set the valid bit for this PF */
8651         bw_data.pf_valid_bits = cpu_to_le16(BIT(pf->hw.pf_id));
8652         bw_data.max_bw[pf->hw.pf_id] = pf->npar_max_bw & I40E_ALT_BW_VALUE_MASK;
8653         bw_data.min_bw[pf->hw.pf_id] = pf->npar_min_bw & I40E_ALT_BW_VALUE_MASK;
8654
8655         /* Set the new bandwidths */
8656         status = i40e_aq_configure_partition_bw(&pf->hw, &bw_data, NULL);
8657
8658         return status;
8659 }
8660
8661 /**
8662  * i40e_commit_npar_bw_setting - Commit BW settings for this PF partition
8663  * @pf: board private structure
8664  **/
8665 i40e_status i40e_commit_npar_bw_setting(struct i40e_pf *pf)
8666 {
8667         /* Commit temporary BW setting to permanent NVM image */
8668         enum i40e_admin_queue_err last_aq_status;
8669         i40e_status ret;
8670         u16 nvm_word;
8671
8672         if (pf->hw.partition_id != 1) {
8673                 dev_info(&pf->pdev->dev,
8674                          "Commit BW only works on partition 1! This is partition %d",
8675                          pf->hw.partition_id);
8676                 ret = I40E_NOT_SUPPORTED;
8677                 goto bw_commit_out;
8678         }
8679
8680         /* Acquire NVM for read access */
8681         ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_READ);
8682         last_aq_status = pf->hw.aq.asq_last_status;
8683         if (ret) {
8684                 dev_info(&pf->pdev->dev,
8685                          "Cannot acquire NVM for read access, err %s aq_err %s\n",
8686                          i40e_stat_str(&pf->hw, ret),
8687                          i40e_aq_str(&pf->hw, last_aq_status));
8688                 goto bw_commit_out;
8689         }
8690
8691         /* Read word 0x10 of NVM - SW compatibility word 1 */
8692         ret = i40e_aq_read_nvm(&pf->hw,
8693                                I40E_SR_NVM_CONTROL_WORD,
8694                                0x10, sizeof(nvm_word), &nvm_word,
8695                                false, NULL);
8696         /* Save off last admin queue command status before releasing
8697          * the NVM
8698          */
8699         last_aq_status = pf->hw.aq.asq_last_status;
8700         i40e_release_nvm(&pf->hw);
8701         if (ret) {
8702                 dev_info(&pf->pdev->dev, "NVM read error, err %s aq_err %s\n",
8703                          i40e_stat_str(&pf->hw, ret),
8704                          i40e_aq_str(&pf->hw, last_aq_status));
8705                 goto bw_commit_out;
8706         }
8707
8708         /* Wait a bit for NVM release to complete */
8709         msleep(50);
8710
8711         /* Acquire NVM for write access */
8712         ret = i40e_acquire_nvm(&pf->hw, I40E_RESOURCE_WRITE);
8713         last_aq_status = pf->hw.aq.asq_last_status;
8714         if (ret) {
8715                 dev_info(&pf->pdev->dev,
8716                          "Cannot acquire NVM for write access, err %s aq_err %s\n",
8717                          i40e_stat_str(&pf->hw, ret),
8718                          i40e_aq_str(&pf->hw, last_aq_status));
8719                 goto bw_commit_out;
8720         }
8721         /* Write it back out unchanged to initiate update NVM,
8722          * which will force a write of the shadow (alt) RAM to
8723          * the NVM - thus storing the bandwidth values permanently.
8724          */
8725         ret = i40e_aq_update_nvm(&pf->hw,
8726                                  I40E_SR_NVM_CONTROL_WORD,
8727                                  0x10, sizeof(nvm_word),
8728                                  &nvm_word, true, NULL);
8729         /* Save off last admin queue command status before releasing
8730          * the NVM
8731          */
8732         last_aq_status = pf->hw.aq.asq_last_status;
8733         i40e_release_nvm(&pf->hw);
8734         if (ret)
8735                 dev_info(&pf->pdev->dev,
8736                          "BW settings NOT SAVED, err %s aq_err %s\n",
8737                          i40e_stat_str(&pf->hw, ret),
8738                          i40e_aq_str(&pf->hw, last_aq_status));
8739 bw_commit_out:
8740
8741         return ret;
8742 }
8743
8744 /**
8745  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
8746  * @pf: board private structure to initialize
8747  *
8748  * i40e_sw_init initializes the Adapter private data structure.
8749  * Fields are initialized based on PCI device information and
8750  * OS network device settings (MTU size).
8751  **/
8752 static int i40e_sw_init(struct i40e_pf *pf)
8753 {
8754         int err = 0;
8755         int size;
8756
8757         /* Set default capability flags */
8758         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
8759                     I40E_FLAG_MSI_ENABLED     |
8760                     I40E_FLAG_MSIX_ENABLED;
8761
8762         /* Set default ITR */
8763         pf->rx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF;
8764         pf->tx_itr_default = I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF;
8765
8766         /* Depending on PF configurations, it is possible that the RSS
8767          * maximum might end up larger than the available queues
8768          */
8769         pf->rss_size_max = BIT(pf->hw.func_caps.rss_table_entry_width);
8770         pf->alloc_rss_size = 1;
8771         pf->rss_table_size = pf->hw.func_caps.rss_table_size;
8772         pf->rss_size_max = min_t(int, pf->rss_size_max,
8773                                  pf->hw.func_caps.num_tx_qp);
8774         if (pf->hw.func_caps.rss) {
8775                 pf->flags |= I40E_FLAG_RSS_ENABLED;
8776                 pf->alloc_rss_size = min_t(int, pf->rss_size_max,
8777                                            num_online_cpus());
8778         }
8779
8780         /* MFP mode enabled */
8781         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.flex10_enable) {
8782                 pf->flags |= I40E_FLAG_MFP_ENABLED;
8783                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
8784                 if (i40e_get_npar_bw_setting(pf))
8785                         dev_warn(&pf->pdev->dev,
8786                                  "Could not get NPAR bw settings\n");
8787                 else
8788                         dev_info(&pf->pdev->dev,
8789                                  "Min BW = %8.8x, Max BW = %8.8x\n",
8790                                  pf->npar_min_bw, pf->npar_max_bw);
8791         }
8792
8793         /* FW/NVM is not yet fixed in this regard */
8794         if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
8795             (pf->hw.func_caps.fd_filters_best_effort > 0)) {
8796                 pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
8797                 pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
8798                 if (pf->flags & I40E_FLAG_MFP_ENABLED &&
8799                     pf->hw.num_partitions > 1)
8800                         dev_info(&pf->pdev->dev,
8801                                  "Flow Director Sideband mode Disabled in MFP mode\n");
8802                 else
8803                         pf->flags |= I40E_FLAG_FD_SB_ENABLED;
8804                 pf->fdir_pf_filter_count =
8805                                  pf->hw.func_caps.fd_filters_guaranteed;
8806                 pf->hw.fdir_shared_filter_count =
8807                                  pf->hw.func_caps.fd_filters_best_effort;
8808         }
8809
8810         if ((pf->hw.mac.type == I40E_MAC_XL710) &&
8811             (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 33)) ||
8812             (pf->hw.aq.fw_maj_ver < 4))) {
8813                 pf->flags |= I40E_FLAG_RESTART_AUTONEG;
8814                 /* No DCB support  for FW < v4.33 */
8815                 pf->flags |= I40E_FLAG_NO_DCB_SUPPORT;
8816         }
8817
8818         /* Disable FW LLDP if FW < v4.3 */
8819         if ((pf->hw.mac.type == I40E_MAC_XL710) &&
8820             (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver < 3)) ||
8821             (pf->hw.aq.fw_maj_ver < 4)))
8822                 pf->flags |= I40E_FLAG_STOP_FW_LLDP;
8823
8824         /* Use the FW Set LLDP MIB API if FW > v4.40 */
8825         if ((pf->hw.mac.type == I40E_MAC_XL710) &&
8826             (((pf->hw.aq.fw_maj_ver == 4) && (pf->hw.aq.fw_min_ver >= 40)) ||
8827             (pf->hw.aq.fw_maj_ver >= 5)))
8828                 pf->flags |= I40E_FLAG_USE_SET_LLDP_MIB;
8829
8830         if (pf->hw.func_caps.vmdq) {
8831                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
8832                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
8833                 pf->num_vmdq_qps = i40e_default_queues_per_vmdq(pf);
8834         }
8835
8836         if (pf->hw.func_caps.iwarp) {
8837                 pf->flags |= I40E_FLAG_IWARP_ENABLED;
8838                 /* IWARP needs one extra vector for CQP just like MISC.*/
8839                 pf->num_iwarp_msix = (int)num_online_cpus() + 1;
8840         }
8841
8842 #ifdef I40E_FCOE
8843         i40e_init_pf_fcoe(pf);
8844
8845 #endif /* I40E_FCOE */
8846 #ifdef CONFIG_PCI_IOV
8847         if (pf->hw.func_caps.num_vfs && pf->hw.partition_id == 1) {
8848                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
8849                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
8850                 pf->num_req_vfs = min_t(int,
8851                                         pf->hw.func_caps.num_vfs,
8852                                         I40E_MAX_VF_COUNT);
8853         }
8854 #endif /* CONFIG_PCI_IOV */
8855         if (pf->hw.mac.type == I40E_MAC_X722) {
8856                 pf->flags |= I40E_FLAG_RSS_AQ_CAPABLE
8857                              | I40E_FLAG_128_QP_RSS_CAPABLE
8858                              | I40E_FLAG_HW_ATR_EVICT_CAPABLE
8859                              | I40E_FLAG_OUTER_UDP_CSUM_CAPABLE
8860                              | I40E_FLAG_WB_ON_ITR_CAPABLE
8861                              | I40E_FLAG_MULTIPLE_TCP_UDP_RSS_PCTYPE
8862                              | I40E_FLAG_NO_PCI_LINK_CHECK
8863                              | I40E_FLAG_USE_SET_LLDP_MIB
8864                              | I40E_FLAG_GENEVE_OFFLOAD_CAPABLE
8865                              | I40E_FLAG_PTP_L4_CAPABLE
8866                              | I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE;
8867         } else if ((pf->hw.aq.api_maj_ver > 1) ||
8868                    ((pf->hw.aq.api_maj_ver == 1) &&
8869                     (pf->hw.aq.api_min_ver > 4))) {
8870                 /* Supported in FW API version higher than 1.4 */
8871                 pf->flags |= I40E_FLAG_GENEVE_OFFLOAD_CAPABLE;
8872                 pf->hw_disabled_flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
8873         } else {
8874                 pf->hw_disabled_flags = I40E_FLAG_HW_ATR_EVICT_CAPABLE;
8875         }
8876
8877         pf->eeprom_version = 0xDEAD;
8878         pf->lan_veb = I40E_NO_VEB;
8879         pf->lan_vsi = I40E_NO_VSI;
8880
8881         /* By default FW has this off for performance reasons */
8882         pf->flags &= ~I40E_FLAG_VEB_STATS_ENABLED;
8883
8884         /* set up queue assignment tracking */
8885         size = sizeof(struct i40e_lump_tracking)
8886                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
8887         pf->qp_pile = kzalloc(size, GFP_KERNEL);
8888         if (!pf->qp_pile) {
8889                 err = -ENOMEM;
8890                 goto sw_init_done;
8891         }
8892         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
8893         pf->qp_pile->search_hint = 0;
8894
8895         pf->tx_timeout_recovery_level = 1;
8896
8897         mutex_init(&pf->switch_mutex);
8898
8899         /* If NPAR is enabled nudge the Tx scheduler */
8900         if (pf->hw.func_caps.npar_enable && (!i40e_get_npar_bw_setting(pf)))
8901                 i40e_set_npar_bw_setting(pf);
8902
8903 sw_init_done:
8904         return err;
8905 }
8906
8907 /**
8908  * i40e_set_ntuple - set the ntuple feature flag and take action
8909  * @pf: board private structure to initialize
8910  * @features: the feature set that the stack is suggesting
8911  *
8912  * returns a bool to indicate if reset needs to happen
8913  **/
8914 bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
8915 {
8916         bool need_reset = false;
8917
8918         /* Check if Flow Director n-tuple support was enabled or disabled.  If
8919          * the state changed, we need to reset.
8920          */
8921         if (features & NETIF_F_NTUPLE) {
8922                 /* Enable filters and mark for reset */
8923                 if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
8924                         need_reset = true;
8925                 /* enable FD_SB only if there is MSI-X vector */
8926                 if (pf->num_fdsb_msix > 0)
8927                         pf->flags |= I40E_FLAG_FD_SB_ENABLED;
8928         } else {
8929                 /* turn off filters, mark for reset and clear SW filter list */
8930                 if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
8931                         need_reset = true;
8932                         i40e_fdir_filter_exit(pf);
8933                 }
8934                 pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
8935                 pf->hw_disabled_flags &= ~I40E_FLAG_FD_SB_ENABLED;
8936                 /* reset fd counters */
8937                 pf->fd_add_err = pf->fd_atr_cnt = pf->fd_tcp_rule = 0;
8938                 pf->fdir_pf_active_filters = 0;
8939                 /* if ATR was auto disabled it can be re-enabled. */
8940                 if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
8941                     (pf->hw_disabled_flags & I40E_FLAG_FD_ATR_ENABLED)) {
8942                         pf->hw_disabled_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
8943                         if (I40E_DEBUG_FD & pf->hw.debug_mask)
8944                                 dev_info(&pf->pdev->dev, "ATR re-enabled.\n");
8945                 }
8946         }
8947         return need_reset;
8948 }
8949
8950 /**
8951  * i40e_clear_rss_lut - clear the rx hash lookup table
8952  * @vsi: the VSI being configured
8953  **/
8954 static void i40e_clear_rss_lut(struct i40e_vsi *vsi)
8955 {
8956         struct i40e_pf *pf = vsi->back;
8957         struct i40e_hw *hw = &pf->hw;
8958         u16 vf_id = vsi->vf_id;
8959         u8 i;
8960
8961         if (vsi->type == I40E_VSI_MAIN) {
8962                 for (i = 0; i <= I40E_PFQF_HLUT_MAX_INDEX; i++)
8963                         wr32(hw, I40E_PFQF_HLUT(i), 0);
8964         } else if (vsi->type == I40E_VSI_SRIOV) {
8965                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
8966                         i40e_write_rx_ctl(hw, I40E_VFQF_HLUT1(i, vf_id), 0);
8967         } else {
8968                 dev_err(&pf->pdev->dev, "Cannot set RSS LUT - invalid VSI type\n");
8969         }
8970 }
8971
8972 /**
8973  * i40e_set_features - set the netdev feature flags
8974  * @netdev: ptr to the netdev being adjusted
8975  * @features: the feature set that the stack is suggesting
8976  **/
8977 static int i40e_set_features(struct net_device *netdev,
8978                              netdev_features_t features)
8979 {
8980         struct i40e_netdev_priv *np = netdev_priv(netdev);
8981         struct i40e_vsi *vsi = np->vsi;
8982         struct i40e_pf *pf = vsi->back;
8983         bool need_reset;
8984
8985         if (features & NETIF_F_RXHASH && !(netdev->features & NETIF_F_RXHASH))
8986                 i40e_pf_config_rss(pf);
8987         else if (!(features & NETIF_F_RXHASH) &&
8988                  netdev->features & NETIF_F_RXHASH)
8989                 i40e_clear_rss_lut(vsi);
8990
8991         if (features & NETIF_F_HW_VLAN_CTAG_RX)
8992                 i40e_vlan_stripping_enable(vsi);
8993         else
8994                 i40e_vlan_stripping_disable(vsi);
8995
8996         need_reset = i40e_set_ntuple(pf, features);
8997
8998         if (need_reset)
8999                 i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
9000
9001         return 0;
9002 }
9003
9004 /**
9005  * i40e_get_udp_port_idx - Lookup a possibly offloaded for Rx UDP port
9006  * @pf: board private structure
9007  * @port: The UDP port to look up
9008  *
9009  * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
9010  **/
9011 static u8 i40e_get_udp_port_idx(struct i40e_pf *pf, u16 port)
9012 {
9013         u8 i;
9014
9015         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
9016                 if (pf->udp_ports[i].index == port)
9017                         return i;
9018         }
9019
9020         return i;
9021 }
9022
9023 /**
9024  * i40e_udp_tunnel_add - Get notifications about UDP tunnel ports that come up
9025  * @netdev: This physical port's netdev
9026  * @ti: Tunnel endpoint information
9027  **/
9028 static void i40e_udp_tunnel_add(struct net_device *netdev,
9029                                 struct udp_tunnel_info *ti)
9030 {
9031         struct i40e_netdev_priv *np = netdev_priv(netdev);
9032         struct i40e_vsi *vsi = np->vsi;
9033         struct i40e_pf *pf = vsi->back;
9034         u16 port = ntohs(ti->port);
9035         u8 next_idx;
9036         u8 idx;
9037
9038         idx = i40e_get_udp_port_idx(pf, port);
9039
9040         /* Check if port already exists */
9041         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
9042                 netdev_info(netdev, "port %d already offloaded\n", port);
9043                 return;
9044         }
9045
9046         /* Now check if there is space to add the new port */
9047         next_idx = i40e_get_udp_port_idx(pf, 0);
9048
9049         if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
9050                 netdev_info(netdev, "maximum number of offloaded UDP ports reached, not adding port %d\n",
9051                             port);
9052                 return;
9053         }
9054
9055         switch (ti->type) {
9056         case UDP_TUNNEL_TYPE_VXLAN:
9057                 pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_VXLAN;
9058                 break;
9059         case UDP_TUNNEL_TYPE_GENEVE:
9060                 if (!(pf->flags & I40E_FLAG_GENEVE_OFFLOAD_CAPABLE))
9061                         return;
9062                 pf->udp_ports[next_idx].type = I40E_AQC_TUNNEL_TYPE_NGE;
9063                 break;
9064         default:
9065                 return;
9066         }
9067
9068         /* New port: add it and mark its index in the bitmap */
9069         pf->udp_ports[next_idx].index = port;
9070         pf->pending_udp_bitmap |= BIT_ULL(next_idx);
9071         pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
9072 }
9073
9074 /**
9075  * i40e_udp_tunnel_del - Get notifications about UDP tunnel ports that go away
9076  * @netdev: This physical port's netdev
9077  * @ti: Tunnel endpoint information
9078  **/
9079 static void i40e_udp_tunnel_del(struct net_device *netdev,
9080                                 struct udp_tunnel_info *ti)
9081 {
9082         struct i40e_netdev_priv *np = netdev_priv(netdev);
9083         struct i40e_vsi *vsi = np->vsi;
9084         struct i40e_pf *pf = vsi->back;
9085         u16 port = ntohs(ti->port);
9086         u8 idx;
9087
9088         idx = i40e_get_udp_port_idx(pf, port);
9089
9090         /* Check if port already exists */
9091         if (idx >= I40E_MAX_PF_UDP_OFFLOAD_PORTS)
9092                 goto not_found;
9093
9094         switch (ti->type) {
9095         case UDP_TUNNEL_TYPE_VXLAN:
9096                 if (pf->udp_ports[idx].type != I40E_AQC_TUNNEL_TYPE_VXLAN)
9097                         goto not_found;
9098                 break;
9099         case UDP_TUNNEL_TYPE_GENEVE:
9100                 if (pf->udp_ports[idx].type != I40E_AQC_TUNNEL_TYPE_NGE)
9101                         goto not_found;
9102                 break;
9103         default:
9104                 goto not_found;
9105         }
9106
9107         /* if port exists, set it to 0 (mark for deletion)
9108          * and make it pending
9109          */
9110         pf->udp_ports[idx].index = 0;
9111         pf->pending_udp_bitmap |= BIT_ULL(idx);
9112         pf->flags |= I40E_FLAG_UDP_FILTER_SYNC;
9113
9114         return;
9115 not_found:
9116         netdev_warn(netdev, "UDP port %d was not found, not deleting\n",
9117                     port);
9118 }
9119
9120 static int i40e_get_phys_port_id(struct net_device *netdev,
9121                                  struct netdev_phys_item_id *ppid)
9122 {
9123         struct i40e_netdev_priv *np = netdev_priv(netdev);
9124         struct i40e_pf *pf = np->vsi->back;
9125         struct i40e_hw *hw = &pf->hw;
9126
9127         if (!(pf->flags & I40E_FLAG_PORT_ID_VALID))
9128                 return -EOPNOTSUPP;
9129
9130         ppid->id_len = min_t(int, sizeof(hw->mac.port_addr), sizeof(ppid->id));
9131         memcpy(ppid->id, hw->mac.port_addr, ppid->id_len);
9132
9133         return 0;
9134 }
9135
9136 /**
9137  * i40e_ndo_fdb_add - add an entry to the hardware database
9138  * @ndm: the input from the stack
9139  * @tb: pointer to array of nladdr (unused)
9140  * @dev: the net device pointer
9141  * @addr: the MAC address entry being added
9142  * @flags: instructions from stack about fdb operation
9143  */
9144 static int i40e_ndo_fdb_add(struct ndmsg *ndm, struct nlattr *tb[],
9145                             struct net_device *dev,
9146                             const unsigned char *addr, u16 vid,
9147                             u16 flags)
9148 {
9149         struct i40e_netdev_priv *np = netdev_priv(dev);
9150         struct i40e_pf *pf = np->vsi->back;
9151         int err = 0;
9152
9153         if (!(pf->flags & I40E_FLAG_SRIOV_ENABLED))
9154                 return -EOPNOTSUPP;
9155
9156         if (vid) {
9157                 pr_info("%s: vlans aren't supported yet for dev_uc|mc_add()\n", dev->name);
9158                 return -EINVAL;
9159         }
9160
9161         /* Hardware does not support aging addresses so if a
9162          * ndm_state is given only allow permanent addresses
9163          */
9164         if (ndm->ndm_state && !(ndm->ndm_state & NUD_PERMANENT)) {
9165                 netdev_info(dev, "FDB only supports static addresses\n");
9166                 return -EINVAL;
9167         }
9168
9169         if (is_unicast_ether_addr(addr) || is_link_local_ether_addr(addr))
9170                 err = dev_uc_add_excl(dev, addr);
9171         else if (is_multicast_ether_addr(addr))
9172                 err = dev_mc_add_excl(dev, addr);
9173         else
9174                 err = -EINVAL;
9175
9176         /* Only return duplicate errors if NLM_F_EXCL is set */
9177         if (err == -EEXIST && !(flags & NLM_F_EXCL))
9178                 err = 0;
9179
9180         return err;
9181 }
9182
9183 /**
9184  * i40e_ndo_bridge_setlink - Set the hardware bridge mode
9185  * @dev: the netdev being configured
9186  * @nlh: RTNL message
9187  *
9188  * Inserts a new hardware bridge if not already created and
9189  * enables the bridging mode requested (VEB or VEPA). If the
9190  * hardware bridge has already been inserted and the request
9191  * is to change the mode then that requires a PF reset to
9192  * allow rebuild of the components with required hardware
9193  * bridge mode enabled.
9194  **/
9195 static int i40e_ndo_bridge_setlink(struct net_device *dev,
9196                                    struct nlmsghdr *nlh,
9197                                    u16 flags)
9198 {
9199         struct i40e_netdev_priv *np = netdev_priv(dev);
9200         struct i40e_vsi *vsi = np->vsi;
9201         struct i40e_pf *pf = vsi->back;
9202         struct i40e_veb *veb = NULL;
9203         struct nlattr *attr, *br_spec;
9204         int i, rem;
9205
9206         /* Only for PF VSI for now */
9207         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
9208                 return -EOPNOTSUPP;
9209
9210         /* Find the HW bridge for PF VSI */
9211         for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
9212                 if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
9213                         veb = pf->veb[i];
9214         }
9215
9216         br_spec = nlmsg_find_attr(nlh, sizeof(struct ifinfomsg), IFLA_AF_SPEC);
9217
9218         nla_for_each_nested(attr, br_spec, rem) {
9219                 __u16 mode;
9220
9221                 if (nla_type(attr) != IFLA_BRIDGE_MODE)
9222                         continue;
9223
9224                 mode = nla_get_u16(attr);
9225                 if ((mode != BRIDGE_MODE_VEPA) &&
9226                     (mode != BRIDGE_MODE_VEB))
9227                         return -EINVAL;
9228
9229                 /* Insert a new HW bridge */
9230                 if (!veb) {
9231                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
9232                                              vsi->tc_config.enabled_tc);
9233                         if (veb) {
9234                                 veb->bridge_mode = mode;
9235                                 i40e_config_bridge_mode(veb);
9236                         } else {
9237                                 /* No Bridge HW offload available */
9238                                 return -ENOENT;
9239                         }
9240                         break;
9241                 } else if (mode != veb->bridge_mode) {
9242                         /* Existing HW bridge but different mode needs reset */
9243                         veb->bridge_mode = mode;
9244                         /* TODO: If no VFs or VMDq VSIs, disallow VEB mode */
9245                         if (mode == BRIDGE_MODE_VEB)
9246                                 pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
9247                         else
9248                                 pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
9249                         i40e_do_reset(pf, BIT_ULL(__I40E_PF_RESET_REQUESTED));
9250                         break;
9251                 }
9252         }
9253
9254         return 0;
9255 }
9256
9257 /**
9258  * i40e_ndo_bridge_getlink - Get the hardware bridge mode
9259  * @skb: skb buff
9260  * @pid: process id
9261  * @seq: RTNL message seq #
9262  * @dev: the netdev being configured
9263  * @filter_mask: unused
9264  * @nlflags: netlink flags passed in
9265  *
9266  * Return the mode in which the hardware bridge is operating in
9267  * i.e VEB or VEPA.
9268  **/
9269 static int i40e_ndo_bridge_getlink(struct sk_buff *skb, u32 pid, u32 seq,
9270                                    struct net_device *dev,
9271                                    u32 __always_unused filter_mask,
9272                                    int nlflags)
9273 {
9274         struct i40e_netdev_priv *np = netdev_priv(dev);
9275         struct i40e_vsi *vsi = np->vsi;
9276         struct i40e_pf *pf = vsi->back;
9277         struct i40e_veb *veb = NULL;
9278         int i;
9279
9280         /* Only for PF VSI for now */
9281         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid)
9282                 return -EOPNOTSUPP;
9283
9284         /* Find the HW bridge for the PF VSI */
9285         for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
9286                 if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
9287                         veb = pf->veb[i];
9288         }
9289
9290         if (!veb)
9291                 return 0;
9292
9293         return ndo_dflt_bridge_getlink(skb, pid, seq, dev, veb->bridge_mode,
9294                                        0, 0, nlflags, filter_mask, NULL);
9295 }
9296
9297 /**
9298  * i40e_features_check - Validate encapsulated packet conforms to limits
9299  * @skb: skb buff
9300  * @dev: This physical port's netdev
9301  * @features: Offload features that the stack believes apply
9302  **/
9303 static netdev_features_t i40e_features_check(struct sk_buff *skb,
9304                                              struct net_device *dev,
9305                                              netdev_features_t features)
9306 {
9307         size_t len;
9308
9309         /* No point in doing any of this if neither checksum nor GSO are
9310          * being requested for this frame.  We can rule out both by just
9311          * checking for CHECKSUM_PARTIAL
9312          */
9313         if (skb->ip_summed != CHECKSUM_PARTIAL)
9314                 return features;
9315
9316         /* We cannot support GSO if the MSS is going to be less than
9317          * 64 bytes.  If it is then we need to drop support for GSO.
9318          */
9319         if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
9320                 features &= ~NETIF_F_GSO_MASK;
9321
9322         /* MACLEN can support at most 63 words */
9323         len = skb_network_header(skb) - skb->data;
9324         if (len & ~(63 * 2))
9325                 goto out_err;
9326
9327         /* IPLEN and EIPLEN can support at most 127 dwords */
9328         len = skb_transport_header(skb) - skb_network_header(skb);
9329         if (len & ~(127 * 4))
9330                 goto out_err;
9331
9332         if (skb->encapsulation) {
9333                 /* L4TUNLEN can support 127 words */
9334                 len = skb_inner_network_header(skb) - skb_transport_header(skb);
9335                 if (len & ~(127 * 2))
9336                         goto out_err;
9337
9338                 /* IPLEN can support at most 127 dwords */
9339                 len = skb_inner_transport_header(skb) -
9340                       skb_inner_network_header(skb);
9341                 if (len & ~(127 * 4))
9342                         goto out_err;
9343         }
9344
9345         /* No need to validate L4LEN as TCP is the only protocol with a
9346          * a flexible value and we support all possible values supported
9347          * by TCP, which is at most 15 dwords
9348          */
9349
9350         return features;
9351 out_err:
9352         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
9353 }
9354
9355 static const struct net_device_ops i40e_netdev_ops = {
9356         .ndo_open               = i40e_open,
9357         .ndo_stop               = i40e_close,
9358         .ndo_start_xmit         = i40e_lan_xmit_frame,
9359         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
9360         .ndo_set_rx_mode        = i40e_set_rx_mode,
9361         .ndo_validate_addr      = eth_validate_addr,
9362         .ndo_set_mac_address    = i40e_set_mac,
9363         .ndo_change_mtu         = i40e_change_mtu,
9364         .ndo_do_ioctl           = i40e_ioctl,
9365         .ndo_tx_timeout         = i40e_tx_timeout,
9366         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
9367         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
9368 #ifdef CONFIG_NET_POLL_CONTROLLER
9369         .ndo_poll_controller    = i40e_netpoll,
9370 #endif
9371         .ndo_setup_tc           = __i40e_setup_tc,
9372 #ifdef I40E_FCOE
9373         .ndo_fcoe_enable        = i40e_fcoe_enable,
9374         .ndo_fcoe_disable       = i40e_fcoe_disable,
9375 #endif
9376         .ndo_set_features       = i40e_set_features,
9377         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
9378         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
9379         .ndo_set_vf_rate        = i40e_ndo_set_vf_bw,
9380         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
9381         .ndo_set_vf_link_state  = i40e_ndo_set_vf_link_state,
9382         .ndo_set_vf_spoofchk    = i40e_ndo_set_vf_spoofchk,
9383         .ndo_set_vf_trust       = i40e_ndo_set_vf_trust,
9384         .ndo_udp_tunnel_add     = i40e_udp_tunnel_add,
9385         .ndo_udp_tunnel_del     = i40e_udp_tunnel_del,
9386         .ndo_get_phys_port_id   = i40e_get_phys_port_id,
9387         .ndo_fdb_add            = i40e_ndo_fdb_add,
9388         .ndo_features_check     = i40e_features_check,
9389         .ndo_bridge_getlink     = i40e_ndo_bridge_getlink,
9390         .ndo_bridge_setlink     = i40e_ndo_bridge_setlink,
9391 };
9392
9393 /**
9394  * i40e_config_netdev - Setup the netdev flags
9395  * @vsi: the VSI being configured
9396  *
9397  * Returns 0 on success, negative value on failure
9398  **/
9399 static int i40e_config_netdev(struct i40e_vsi *vsi)
9400 {
9401         struct i40e_pf *pf = vsi->back;
9402         struct i40e_hw *hw = &pf->hw;
9403         struct i40e_netdev_priv *np;
9404         struct net_device *netdev;
9405         u8 broadcast[ETH_ALEN];
9406         u8 mac_addr[ETH_ALEN];
9407         int etherdev_size;
9408
9409         etherdev_size = sizeof(struct i40e_netdev_priv);
9410         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
9411         if (!netdev)
9412                 return -ENOMEM;
9413
9414         vsi->netdev = netdev;
9415         np = netdev_priv(netdev);
9416         np->vsi = vsi;
9417
9418         netdev->hw_enc_features |= NETIF_F_SG                   |
9419                                    NETIF_F_IP_CSUM              |
9420                                    NETIF_F_IPV6_CSUM            |
9421                                    NETIF_F_HIGHDMA              |
9422                                    NETIF_F_SOFT_FEATURES        |
9423                                    NETIF_F_TSO                  |
9424                                    NETIF_F_TSO_ECN              |
9425                                    NETIF_F_TSO6                 |
9426                                    NETIF_F_GSO_GRE              |
9427                                    NETIF_F_GSO_GRE_CSUM         |
9428                                    NETIF_F_GSO_IPXIP4           |
9429                                    NETIF_F_GSO_IPXIP6           |
9430                                    NETIF_F_GSO_UDP_TUNNEL       |
9431                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
9432                                    NETIF_F_GSO_PARTIAL          |
9433                                    NETIF_F_SCTP_CRC             |
9434                                    NETIF_F_RXHASH               |
9435                                    NETIF_F_RXCSUM               |
9436                                    0;
9437
9438         if (!(pf->flags & I40E_FLAG_OUTER_UDP_CSUM_CAPABLE))
9439                 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
9440
9441         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
9442
9443         /* record features VLANs can make use of */
9444         netdev->vlan_features |= netdev->hw_enc_features |
9445                                  NETIF_F_TSO_MANGLEID;
9446
9447         if (!(pf->flags & I40E_FLAG_MFP_ENABLED))
9448                 netdev->hw_features |= NETIF_F_NTUPLE;
9449
9450         netdev->hw_features |= netdev->hw_enc_features  |
9451                                NETIF_F_HW_VLAN_CTAG_TX  |
9452                                NETIF_F_HW_VLAN_CTAG_RX;
9453
9454         netdev->features |= netdev->hw_features | NETIF_F_HW_VLAN_CTAG_FILTER;
9455         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
9456
9457         if (vsi->type == I40E_VSI_MAIN) {
9458                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
9459                 ether_addr_copy(mac_addr, hw->mac.perm_addr);
9460                 /* The following steps are necessary to properly keep track of
9461                  * MAC-VLAN filters loaded into firmware - first we remove
9462                  * filter that is automatically generated by firmware and then
9463                  * add new filter both to the driver hash table and firmware.
9464                  */
9465                 i40e_rm_default_mac_filter(vsi, mac_addr);
9466                 spin_lock_bh(&vsi->mac_filter_hash_lock);
9467                 i40e_add_mac_filter(vsi, mac_addr);
9468                 spin_unlock_bh(&vsi->mac_filter_hash_lock);
9469         } else {
9470                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
9471                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
9472                          pf->vsi[pf->lan_vsi]->netdev->name);
9473                 random_ether_addr(mac_addr);
9474
9475                 spin_lock_bh(&vsi->mac_filter_hash_lock);
9476                 i40e_add_mac_filter(vsi, mac_addr);
9477                 spin_unlock_bh(&vsi->mac_filter_hash_lock);
9478         }
9479
9480         /* Add the broadcast filter so that we initially will receive
9481          * broadcast packets. Note that when a new VLAN is first added the
9482          * driver will convert all filters marked I40E_VLAN_ANY into VLAN
9483          * specific filters as part of transitioning into "vlan" operation.
9484          * When more VLANs are added, the driver will copy each existing MAC
9485          * filter and add it for the new VLAN.
9486          *
9487          * Broadcast filters are handled specially by
9488          * i40e_sync_filters_subtask, as the driver must to set the broadcast
9489          * promiscuous bit instead of adding this directly as a MAC/VLAN
9490          * filter. The subtask will update the correct broadcast promiscuous
9491          * bits as VLANs become active or inactive.
9492          */
9493         eth_broadcast_addr(broadcast);
9494         spin_lock_bh(&vsi->mac_filter_hash_lock);
9495         i40e_add_mac_filter(vsi, broadcast);
9496         spin_unlock_bh(&vsi->mac_filter_hash_lock);
9497
9498         ether_addr_copy(netdev->dev_addr, mac_addr);
9499         ether_addr_copy(netdev->perm_addr, mac_addr);
9500
9501         netdev->priv_flags |= IFF_UNICAST_FLT;
9502         netdev->priv_flags |= IFF_SUPP_NOFCS;
9503         /* Setup netdev TC information */
9504         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
9505
9506         netdev->netdev_ops = &i40e_netdev_ops;
9507         netdev->watchdog_timeo = 5 * HZ;
9508         i40e_set_ethtool_ops(netdev);
9509 #ifdef I40E_FCOE
9510         i40e_fcoe_config_netdev(netdev, vsi);
9511 #endif
9512
9513         /* MTU range: 68 - 9706 */
9514         netdev->min_mtu = ETH_MIN_MTU;
9515         netdev->max_mtu = I40E_MAX_RXBUFFER -
9516                           (ETH_HLEN + ETH_FCS_LEN + VLAN_HLEN);
9517
9518         return 0;
9519 }
9520
9521 /**
9522  * i40e_vsi_delete - Delete a VSI from the switch
9523  * @vsi: the VSI being removed
9524  *
9525  * Returns 0 on success, negative value on failure
9526  **/
9527 static void i40e_vsi_delete(struct i40e_vsi *vsi)
9528 {
9529         /* remove default VSI is not allowed */
9530         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
9531                 return;
9532
9533         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
9534 }
9535
9536 /**
9537  * i40e_is_vsi_uplink_mode_veb - Check if the VSI's uplink bridge mode is VEB
9538  * @vsi: the VSI being queried
9539  *
9540  * Returns 1 if HW bridge mode is VEB and return 0 in case of VEPA mode
9541  **/
9542 int i40e_is_vsi_uplink_mode_veb(struct i40e_vsi *vsi)
9543 {
9544         struct i40e_veb *veb;
9545         struct i40e_pf *pf = vsi->back;
9546
9547         /* Uplink is not a bridge so default to VEB */
9548         if (vsi->veb_idx == I40E_NO_VEB)
9549                 return 1;
9550
9551         veb = pf->veb[vsi->veb_idx];
9552         if (!veb) {
9553                 dev_info(&pf->pdev->dev,
9554                          "There is no veb associated with the bridge\n");
9555                 return -ENOENT;
9556         }
9557
9558         /* Uplink is a bridge in VEPA mode */
9559         if (veb->bridge_mode & BRIDGE_MODE_VEPA) {
9560                 return 0;
9561         } else {
9562                 /* Uplink is a bridge in VEB mode */
9563                 return 1;
9564         }
9565
9566         /* VEPA is now default bridge, so return 0 */
9567         return 0;
9568 }
9569
9570 /**
9571  * i40e_add_vsi - Add a VSI to the switch
9572  * @vsi: the VSI being configured
9573  *
9574  * This initializes a VSI context depending on the VSI type to be added and
9575  * passes it down to the add_vsi aq command.
9576  **/
9577 static int i40e_add_vsi(struct i40e_vsi *vsi)
9578 {
9579         int ret = -ENODEV;
9580         struct i40e_pf *pf = vsi->back;
9581         struct i40e_hw *hw = &pf->hw;
9582         struct i40e_vsi_context ctxt;
9583         struct i40e_mac_filter *f;
9584         struct hlist_node *h;
9585         int bkt;
9586
9587         u8 enabled_tc = 0x1; /* TC0 enabled */
9588         int f_count = 0;
9589
9590         memset(&ctxt, 0, sizeof(ctxt));
9591         switch (vsi->type) {
9592         case I40E_VSI_MAIN:
9593                 /* The PF's main VSI is already setup as part of the
9594                  * device initialization, so we'll not bother with
9595                  * the add_vsi call, but we will retrieve the current
9596                  * VSI context.
9597                  */
9598                 ctxt.seid = pf->main_vsi_seid;
9599                 ctxt.pf_num = pf->hw.pf_id;
9600                 ctxt.vf_num = 0;
9601                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
9602                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
9603                 if (ret) {
9604                         dev_info(&pf->pdev->dev,
9605                                  "couldn't get PF vsi config, err %s aq_err %s\n",
9606                                  i40e_stat_str(&pf->hw, ret),
9607                                  i40e_aq_str(&pf->hw,
9608                                              pf->hw.aq.asq_last_status));
9609                         return -ENOENT;
9610                 }
9611                 vsi->info = ctxt.info;
9612                 vsi->info.valid_sections = 0;
9613
9614                 vsi->seid = ctxt.seid;
9615                 vsi->id = ctxt.vsi_number;
9616
9617                 enabled_tc = i40e_pf_get_tc_map(pf);
9618
9619                 /* MFP mode setup queue map and update VSI */
9620                 if ((pf->flags & I40E_FLAG_MFP_ENABLED) &&
9621                     !(pf->hw.func_caps.iscsi)) { /* NIC type PF */
9622                         memset(&ctxt, 0, sizeof(ctxt));
9623                         ctxt.seid = pf->main_vsi_seid;
9624                         ctxt.pf_num = pf->hw.pf_id;
9625                         ctxt.vf_num = 0;
9626                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
9627                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
9628                         if (ret) {
9629                                 dev_info(&pf->pdev->dev,
9630                                          "update vsi failed, err %s aq_err %s\n",
9631                                          i40e_stat_str(&pf->hw, ret),
9632                                          i40e_aq_str(&pf->hw,
9633                                                     pf->hw.aq.asq_last_status));
9634                                 ret = -ENOENT;
9635                                 goto err;
9636                         }
9637                         /* update the local VSI info queue map */
9638                         i40e_vsi_update_queue_map(vsi, &ctxt);
9639                         vsi->info.valid_sections = 0;
9640                 } else {
9641                         /* Default/Main VSI is only enabled for TC0
9642                          * reconfigure it to enable all TCs that are
9643                          * available on the port in SFP mode.
9644                          * For MFP case the iSCSI PF would use this
9645                          * flow to enable LAN+iSCSI TC.
9646                          */
9647                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
9648                         if (ret) {
9649                                 dev_info(&pf->pdev->dev,
9650                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %s aq_err %s\n",
9651                                          enabled_tc,
9652                                          i40e_stat_str(&pf->hw, ret),
9653                                          i40e_aq_str(&pf->hw,
9654                                                     pf->hw.aq.asq_last_status));
9655                                 ret = -ENOENT;
9656                         }
9657                 }
9658                 break;
9659
9660         case I40E_VSI_FDIR:
9661                 ctxt.pf_num = hw->pf_id;
9662                 ctxt.vf_num = 0;
9663                 ctxt.uplink_seid = vsi->uplink_seid;
9664                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
9665                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
9666                 if ((pf->flags & I40E_FLAG_VEB_MODE_ENABLED) &&
9667                     (i40e_is_vsi_uplink_mode_veb(vsi))) {
9668                         ctxt.info.valid_sections |=
9669                              cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
9670                         ctxt.info.switch_id =
9671                            cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
9672                 }
9673                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
9674                 break;
9675
9676         case I40E_VSI_VMDQ2:
9677                 ctxt.pf_num = hw->pf_id;
9678                 ctxt.vf_num = 0;
9679                 ctxt.uplink_seid = vsi->uplink_seid;
9680                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
9681                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
9682
9683                 /* This VSI is connected to VEB so the switch_id
9684                  * should be set to zero by default.
9685                  */
9686                 if (i40e_is_vsi_uplink_mode_veb(vsi)) {
9687                         ctxt.info.valid_sections |=
9688                                 cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
9689                         ctxt.info.switch_id =
9690                                 cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
9691                 }
9692
9693                 /* Setup the VSI tx/rx queue map for TC0 only for now */
9694                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
9695                 break;
9696
9697         case I40E_VSI_SRIOV:
9698                 ctxt.pf_num = hw->pf_id;
9699                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
9700                 ctxt.uplink_seid = vsi->uplink_seid;
9701                 ctxt.connection_type = I40E_AQ_VSI_CONN_TYPE_NORMAL;
9702                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
9703
9704                 /* This VSI is connected to VEB so the switch_id
9705                  * should be set to zero by default.
9706                  */
9707                 if (i40e_is_vsi_uplink_mode_veb(vsi)) {
9708                         ctxt.info.valid_sections |=
9709                                 cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
9710                         ctxt.info.switch_id =
9711                                 cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
9712                 }
9713
9714                 if (vsi->back->flags & I40E_FLAG_IWARP_ENABLED) {
9715                         ctxt.info.valid_sections |=
9716                                 cpu_to_le16(I40E_AQ_VSI_PROP_QUEUE_OPT_VALID);
9717                         ctxt.info.queueing_opt_flags |=
9718                                 (I40E_AQ_VSI_QUE_OPT_TCP_ENA |
9719                                  I40E_AQ_VSI_QUE_OPT_RSS_LUT_VSI);
9720                 }
9721
9722                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
9723                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
9724                 if (pf->vf[vsi->vf_id].spoofchk) {
9725                         ctxt.info.valid_sections |=
9726                                 cpu_to_le16(I40E_AQ_VSI_PROP_SECURITY_VALID);
9727                         ctxt.info.sec_flags |=
9728                                 (I40E_AQ_VSI_SEC_FLAG_ENABLE_VLAN_CHK |
9729                                  I40E_AQ_VSI_SEC_FLAG_ENABLE_MAC_CHK);
9730                 }
9731                 /* Setup the VSI tx/rx queue map for TC0 only for now */
9732                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
9733                 break;
9734
9735 #ifdef I40E_FCOE
9736         case I40E_VSI_FCOE:
9737                 ret = i40e_fcoe_vsi_init(vsi, &ctxt);
9738                 if (ret) {
9739                         dev_info(&pf->pdev->dev, "failed to initialize FCoE VSI\n");
9740                         return ret;
9741                 }
9742                 break;
9743
9744 #endif /* I40E_FCOE */
9745         case I40E_VSI_IWARP:
9746                 /* send down message to iWARP */
9747                 break;
9748
9749         default:
9750                 return -ENODEV;
9751         }
9752
9753         if (vsi->type != I40E_VSI_MAIN) {
9754                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
9755                 if (ret) {
9756                         dev_info(&vsi->back->pdev->dev,
9757                                  "add vsi failed, err %s aq_err %s\n",
9758                                  i40e_stat_str(&pf->hw, ret),
9759                                  i40e_aq_str(&pf->hw,
9760                                              pf->hw.aq.asq_last_status));
9761                         ret = -ENOENT;
9762                         goto err;
9763                 }
9764                 vsi->info = ctxt.info;
9765                 vsi->info.valid_sections = 0;
9766                 vsi->seid = ctxt.seid;
9767                 vsi->id = ctxt.vsi_number;
9768         }
9769
9770         vsi->active_filters = 0;
9771         clear_bit(__I40E_FILTER_OVERFLOW_PROMISC, &vsi->state);
9772         spin_lock_bh(&vsi->mac_filter_hash_lock);
9773         /* If macvlan filters already exist, force them to get loaded */
9774         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist) {
9775                 f->state = I40E_FILTER_NEW;
9776                 f_count++;
9777         }
9778         spin_unlock_bh(&vsi->mac_filter_hash_lock);
9779
9780         if (f_count) {
9781                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
9782                 pf->flags |= I40E_FLAG_FILTER_SYNC;
9783         }
9784
9785         /* Update VSI BW information */
9786         ret = i40e_vsi_get_bw_info(vsi);
9787         if (ret) {
9788                 dev_info(&pf->pdev->dev,
9789                          "couldn't get vsi bw info, err %s aq_err %s\n",
9790                          i40e_stat_str(&pf->hw, ret),
9791                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
9792                 /* VSI is already added so not tearing that up */
9793                 ret = 0;
9794         }
9795
9796 err:
9797         return ret;
9798 }
9799
9800 /**
9801  * i40e_vsi_release - Delete a VSI and free its resources
9802  * @vsi: the VSI being removed
9803  *
9804  * Returns 0 on success or < 0 on error
9805  **/
9806 int i40e_vsi_release(struct i40e_vsi *vsi)
9807 {
9808         struct i40e_mac_filter *f;
9809         struct hlist_node *h;
9810         struct i40e_veb *veb = NULL;
9811         struct i40e_pf *pf;
9812         u16 uplink_seid;
9813         int i, n, bkt;
9814
9815         pf = vsi->back;
9816
9817         /* release of a VEB-owner or last VSI is not allowed */
9818         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
9819                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
9820                          vsi->seid, vsi->uplink_seid);
9821                 return -ENODEV;
9822         }
9823         if (vsi == pf->vsi[pf->lan_vsi] &&
9824             !test_bit(__I40E_DOWN, &pf->state)) {
9825                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
9826                 return -ENODEV;
9827         }
9828
9829         uplink_seid = vsi->uplink_seid;
9830         if (vsi->type != I40E_VSI_SRIOV) {
9831                 if (vsi->netdev_registered) {
9832                         vsi->netdev_registered = false;
9833                         if (vsi->netdev) {
9834                                 /* results in a call to i40e_close() */
9835                                 unregister_netdev(vsi->netdev);
9836                         }
9837                 } else {
9838                         i40e_vsi_close(vsi);
9839                 }
9840                 i40e_vsi_disable_irq(vsi);
9841         }
9842
9843         spin_lock_bh(&vsi->mac_filter_hash_lock);
9844
9845         /* clear the sync flag on all filters */
9846         if (vsi->netdev) {
9847                 __dev_uc_unsync(vsi->netdev, NULL);
9848                 __dev_mc_unsync(vsi->netdev, NULL);
9849         }
9850
9851         /* make sure any remaining filters are marked for deletion */
9852         hash_for_each_safe(vsi->mac_filter_hash, bkt, h, f, hlist)
9853                 __i40e_del_filter(vsi, f);
9854
9855         spin_unlock_bh(&vsi->mac_filter_hash_lock);
9856
9857         i40e_sync_vsi_filters(vsi);
9858
9859         i40e_vsi_delete(vsi);
9860         i40e_vsi_free_q_vectors(vsi);
9861         if (vsi->netdev) {
9862                 free_netdev(vsi->netdev);
9863                 vsi->netdev = NULL;
9864         }
9865         i40e_vsi_clear_rings(vsi);
9866         i40e_vsi_clear(vsi);
9867
9868         /* If this was the last thing on the VEB, except for the
9869          * controlling VSI, remove the VEB, which puts the controlling
9870          * VSI onto the next level down in the switch.
9871          *
9872          * Well, okay, there's one more exception here: don't remove
9873          * the orphan VEBs yet.  We'll wait for an explicit remove request
9874          * from up the network stack.
9875          */
9876         for (n = 0, i = 0; i < pf->num_alloc_vsi; i++) {
9877                 if (pf->vsi[i] &&
9878                     pf->vsi[i]->uplink_seid == uplink_seid &&
9879                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
9880                         n++;      /* count the VSIs */
9881                 }
9882         }
9883         for (i = 0; i < I40E_MAX_VEB; i++) {
9884                 if (!pf->veb[i])
9885                         continue;
9886                 if (pf->veb[i]->uplink_seid == uplink_seid)
9887                         n++;     /* count the VEBs */
9888                 if (pf->veb[i]->seid == uplink_seid)
9889                         veb = pf->veb[i];
9890         }
9891         if (n == 0 && veb && veb->uplink_seid != 0)
9892                 i40e_veb_release(veb);
9893
9894         return 0;
9895 }
9896
9897 /**
9898  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
9899  * @vsi: ptr to the VSI
9900  *
9901  * This should only be called after i40e_vsi_mem_alloc() which allocates the
9902  * corresponding SW VSI structure and initializes num_queue_pairs for the
9903  * newly allocated VSI.
9904  *
9905  * Returns 0 on success or negative on failure
9906  **/
9907 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
9908 {
9909         int ret = -ENOENT;
9910         struct i40e_pf *pf = vsi->back;
9911
9912         if (vsi->q_vectors[0]) {
9913                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
9914                          vsi->seid);
9915                 return -EEXIST;
9916         }
9917
9918         if (vsi->base_vector) {
9919                 dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
9920                          vsi->seid, vsi->base_vector);
9921                 return -EEXIST;
9922         }
9923
9924         ret = i40e_vsi_alloc_q_vectors(vsi);
9925         if (ret) {
9926                 dev_info(&pf->pdev->dev,
9927                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
9928                          vsi->num_q_vectors, vsi->seid, ret);
9929                 vsi->num_q_vectors = 0;
9930                 goto vector_setup_out;
9931         }
9932
9933         /* In Legacy mode, we do not have to get any other vector since we
9934          * piggyback on the misc/ICR0 for queue interrupts.
9935         */
9936         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
9937                 return ret;
9938         if (vsi->num_q_vectors)
9939                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
9940                                                  vsi->num_q_vectors, vsi->idx);
9941         if (vsi->base_vector < 0) {
9942                 dev_info(&pf->pdev->dev,
9943                          "failed to get tracking for %d vectors for VSI %d, err=%d\n",
9944                          vsi->num_q_vectors, vsi->seid, vsi->base_vector);
9945                 i40e_vsi_free_q_vectors(vsi);
9946                 ret = -ENOENT;
9947                 goto vector_setup_out;
9948         }
9949
9950 vector_setup_out:
9951         return ret;
9952 }
9953
9954 /**
9955  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
9956  * @vsi: pointer to the vsi.
9957  *
9958  * This re-allocates a vsi's queue resources.
9959  *
9960  * Returns pointer to the successfully allocated and configured VSI sw struct
9961  * on success, otherwise returns NULL on failure.
9962  **/
9963 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
9964 {
9965         struct i40e_pf *pf;
9966         u8 enabled_tc;
9967         int ret;
9968
9969         if (!vsi)
9970                 return NULL;
9971
9972         pf = vsi->back;
9973
9974         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
9975         i40e_vsi_clear_rings(vsi);
9976
9977         i40e_vsi_free_arrays(vsi, false);
9978         i40e_set_num_rings_in_vsi(vsi);
9979         ret = i40e_vsi_alloc_arrays(vsi, false);
9980         if (ret)
9981                 goto err_vsi;
9982
9983         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
9984         if (ret < 0) {
9985                 dev_info(&pf->pdev->dev,
9986                          "failed to get tracking for %d queues for VSI %d err %d\n",
9987                          vsi->alloc_queue_pairs, vsi->seid, ret);
9988                 goto err_vsi;
9989         }
9990         vsi->base_queue = ret;
9991
9992         /* Update the FW view of the VSI. Force a reset of TC and queue
9993          * layout configurations.
9994          */
9995         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
9996         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
9997         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
9998         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
9999         if (vsi->type == I40E_VSI_MAIN)
10000                 i40e_rm_default_mac_filter(vsi, pf->hw.mac.perm_addr);
10001
10002         /* assign it some queues */
10003         ret = i40e_alloc_rings(vsi);
10004         if (ret)
10005                 goto err_rings;
10006
10007         /* map all of the rings to the q_vectors */
10008         i40e_vsi_map_rings_to_vectors(vsi);
10009         return vsi;
10010
10011 err_rings:
10012         i40e_vsi_free_q_vectors(vsi);
10013         if (vsi->netdev_registered) {
10014                 vsi->netdev_registered = false;
10015                 unregister_netdev(vsi->netdev);
10016                 free_netdev(vsi->netdev);
10017                 vsi->netdev = NULL;
10018         }
10019         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
10020 err_vsi:
10021         i40e_vsi_clear(vsi);
10022         return NULL;
10023 }
10024
10025 /**
10026  * i40e_vsi_setup - Set up a VSI by a given type
10027  * @pf: board private structure
10028  * @type: VSI type
10029  * @uplink_seid: the switch element to link to
10030  * @param1: usage depends upon VSI type. For VF types, indicates VF id
10031  *
10032  * This allocates the sw VSI structure and its queue resources, then add a VSI
10033  * to the identified VEB.
10034  *
10035  * Returns pointer to the successfully allocated and configure VSI sw struct on
10036  * success, otherwise returns NULL on failure.
10037  **/
10038 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
10039                                 u16 uplink_seid, u32 param1)
10040 {
10041         struct i40e_vsi *vsi = NULL;
10042         struct i40e_veb *veb = NULL;
10043         int ret, i;
10044         int v_idx;
10045
10046         /* The requested uplink_seid must be either
10047          *     - the PF's port seid
10048          *              no VEB is needed because this is the PF
10049          *              or this is a Flow Director special case VSI
10050          *     - seid of an existing VEB
10051          *     - seid of a VSI that owns an existing VEB
10052          *     - seid of a VSI that doesn't own a VEB
10053          *              a new VEB is created and the VSI becomes the owner
10054          *     - seid of the PF VSI, which is what creates the first VEB
10055          *              this is a special case of the previous
10056          *
10057          * Find which uplink_seid we were given and create a new VEB if needed
10058          */
10059         for (i = 0; i < I40E_MAX_VEB; i++) {
10060                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
10061                         veb = pf->veb[i];
10062                         break;
10063                 }
10064         }
10065
10066         if (!veb && uplink_seid != pf->mac_seid) {
10067
10068                 for (i = 0; i < pf->num_alloc_vsi; i++) {
10069                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
10070                                 vsi = pf->vsi[i];
10071                                 break;
10072                         }
10073                 }
10074                 if (!vsi) {
10075                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
10076                                  uplink_seid);
10077                         return NULL;
10078                 }
10079
10080                 if (vsi->uplink_seid == pf->mac_seid)
10081                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
10082                                              vsi->tc_config.enabled_tc);
10083                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
10084                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
10085                                              vsi->tc_config.enabled_tc);
10086                 if (veb) {
10087                         if (vsi->seid != pf->vsi[pf->lan_vsi]->seid) {
10088                                 dev_info(&vsi->back->pdev->dev,
10089                                          "New VSI creation error, uplink seid of LAN VSI expected.\n");
10090                                 return NULL;
10091                         }
10092                         /* We come up by default in VEPA mode if SRIOV is not
10093                          * already enabled, in which case we can't force VEPA
10094                          * mode.
10095                          */
10096                         if (!(pf->flags & I40E_FLAG_VEB_MODE_ENABLED)) {
10097                                 veb->bridge_mode = BRIDGE_MODE_VEPA;
10098                                 pf->flags &= ~I40E_FLAG_VEB_MODE_ENABLED;
10099                         }
10100                         i40e_config_bridge_mode(veb);
10101                 }
10102                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
10103                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
10104                                 veb = pf->veb[i];
10105                 }
10106                 if (!veb) {
10107                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
10108                         return NULL;
10109                 }
10110
10111                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
10112                 uplink_seid = veb->seid;
10113         }
10114
10115         /* get vsi sw struct */
10116         v_idx = i40e_vsi_mem_alloc(pf, type);
10117         if (v_idx < 0)
10118                 goto err_alloc;
10119         vsi = pf->vsi[v_idx];
10120         if (!vsi)
10121                 goto err_alloc;
10122         vsi->type = type;
10123         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
10124
10125         if (type == I40E_VSI_MAIN)
10126                 pf->lan_vsi = v_idx;
10127         else if (type == I40E_VSI_SRIOV)
10128                 vsi->vf_id = param1;
10129         /* assign it some queues */
10130         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs,
10131                                 vsi->idx);
10132         if (ret < 0) {
10133                 dev_info(&pf->pdev->dev,
10134                          "failed to get tracking for %d queues for VSI %d err=%d\n",
10135                          vsi->alloc_queue_pairs, vsi->seid, ret);
10136                 goto err_vsi;
10137         }
10138         vsi->base_queue = ret;
10139
10140         /* get a VSI from the hardware */
10141         vsi->uplink_seid = uplink_seid;
10142         ret = i40e_add_vsi(vsi);
10143         if (ret)
10144                 goto err_vsi;
10145
10146         switch (vsi->type) {
10147         /* setup the netdev if needed */
10148         case I40E_VSI_MAIN:
10149                 /* Apply relevant filters if a platform-specific mac
10150                  * address was selected.
10151                  */
10152                 if (!!(pf->flags & I40E_FLAG_PF_MAC)) {
10153                         ret = i40e_macaddr_init(vsi, pf->hw.mac.addr);
10154                         if (ret) {
10155                                 dev_warn(&pf->pdev->dev,
10156                                          "could not set up macaddr; err %d\n",
10157                                          ret);
10158                         }
10159                 }
10160         case I40E_VSI_VMDQ2:
10161         case I40E_VSI_FCOE:
10162                 ret = i40e_config_netdev(vsi);
10163                 if (ret)
10164                         goto err_netdev;
10165                 ret = register_netdev(vsi->netdev);
10166                 if (ret)
10167                         goto err_netdev;
10168                 vsi->netdev_registered = true;
10169                 netif_carrier_off(vsi->netdev);
10170 #ifdef CONFIG_I40E_DCB
10171                 /* Setup DCB netlink interface */
10172                 i40e_dcbnl_setup(vsi);
10173 #endif /* CONFIG_I40E_DCB */
10174                 /* fall through */
10175
10176         case I40E_VSI_FDIR:
10177                 /* set up vectors and rings if needed */
10178                 ret = i40e_vsi_setup_vectors(vsi);
10179                 if (ret)
10180                         goto err_msix;
10181
10182                 ret = i40e_alloc_rings(vsi);
10183                 if (ret)
10184                         goto err_rings;
10185
10186                 /* map all of the rings to the q_vectors */
10187                 i40e_vsi_map_rings_to_vectors(vsi);
10188
10189                 i40e_vsi_reset_stats(vsi);
10190                 break;
10191
10192         default:
10193                 /* no netdev or rings for the other VSI types */
10194                 break;
10195         }
10196
10197         if ((pf->flags & I40E_FLAG_RSS_AQ_CAPABLE) &&
10198             (vsi->type == I40E_VSI_VMDQ2)) {
10199                 ret = i40e_vsi_config_rss(vsi);
10200         }
10201         return vsi;
10202
10203 err_rings:
10204         i40e_vsi_free_q_vectors(vsi);
10205 err_msix:
10206         if (vsi->netdev_registered) {
10207                 vsi->netdev_registered = false;
10208                 unregister_netdev(vsi->netdev);
10209                 free_netdev(vsi->netdev);
10210                 vsi->netdev = NULL;
10211         }
10212 err_netdev:
10213         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
10214 err_vsi:
10215         i40e_vsi_clear(vsi);
10216 err_alloc:
10217         return NULL;
10218 }
10219
10220 /**
10221  * i40e_veb_get_bw_info - Query VEB BW information
10222  * @veb: the veb to query
10223  *
10224  * Query the Tx scheduler BW configuration data for given VEB
10225  **/
10226 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
10227 {
10228         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
10229         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
10230         struct i40e_pf *pf = veb->pf;
10231         struct i40e_hw *hw = &pf->hw;
10232         u32 tc_bw_max;
10233         int ret = 0;
10234         int i;
10235
10236         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
10237                                                   &bw_data, NULL);
10238         if (ret) {
10239                 dev_info(&pf->pdev->dev,
10240                          "query veb bw config failed, err %s aq_err %s\n",
10241                          i40e_stat_str(&pf->hw, ret),
10242                          i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
10243                 goto out;
10244         }
10245
10246         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
10247                                                    &ets_data, NULL);
10248         if (ret) {
10249                 dev_info(&pf->pdev->dev,
10250                          "query veb bw ets config failed, err %s aq_err %s\n",
10251                          i40e_stat_str(&pf->hw, ret),
10252                          i40e_aq_str(&pf->hw, hw->aq.asq_last_status));
10253                 goto out;
10254         }
10255
10256         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
10257         veb->bw_max_quanta = ets_data.tc_bw_max;
10258         veb->is_abs_credits = bw_data.absolute_credits_enable;
10259         veb->enabled_tc = ets_data.tc_valid_bits;
10260         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
10261                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
10262         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
10263                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
10264                 veb->bw_tc_limit_credits[i] =
10265                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
10266                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
10267         }
10268
10269 out:
10270         return ret;
10271 }
10272
10273 /**
10274  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
10275  * @pf: board private structure
10276  *
10277  * On error: returns error code (negative)
10278  * On success: returns vsi index in PF (positive)
10279  **/
10280 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
10281 {
10282         int ret = -ENOENT;
10283         struct i40e_veb *veb;
10284         int i;
10285
10286         /* Need to protect the allocation of switch elements at the PF level */
10287         mutex_lock(&pf->switch_mutex);
10288
10289         /* VEB list may be fragmented if VEB creation/destruction has
10290          * been happening.  We can afford to do a quick scan to look
10291          * for any free slots in the list.
10292          *
10293          * find next empty veb slot, looping back around if necessary
10294          */
10295         i = 0;
10296         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
10297                 i++;
10298         if (i >= I40E_MAX_VEB) {
10299                 ret = -ENOMEM;
10300                 goto err_alloc_veb;  /* out of VEB slots! */
10301         }
10302
10303         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
10304         if (!veb) {
10305                 ret = -ENOMEM;
10306                 goto err_alloc_veb;
10307         }
10308         veb->pf = pf;
10309         veb->idx = i;
10310         veb->enabled_tc = 1;
10311
10312         pf->veb[i] = veb;
10313         ret = i;
10314 err_alloc_veb:
10315         mutex_unlock(&pf->switch_mutex);
10316         return ret;
10317 }
10318
10319 /**
10320  * i40e_switch_branch_release - Delete a branch of the switch tree
10321  * @branch: where to start deleting
10322  *
10323  * This uses recursion to find the tips of the branch to be
10324  * removed, deleting until we get back to and can delete this VEB.
10325  **/
10326 static void i40e_switch_branch_release(struct i40e_veb *branch)
10327 {
10328         struct i40e_pf *pf = branch->pf;
10329         u16 branch_seid = branch->seid;
10330         u16 veb_idx = branch->idx;
10331         int i;
10332
10333         /* release any VEBs on this VEB - RECURSION */
10334         for (i = 0; i < I40E_MAX_VEB; i++) {
10335                 if (!pf->veb[i])
10336                         continue;
10337                 if (pf->veb[i]->uplink_seid == branch->seid)
10338                         i40e_switch_branch_release(pf->veb[i]);
10339         }
10340
10341         /* Release the VSIs on this VEB, but not the owner VSI.
10342          *
10343          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
10344          *       the VEB itself, so don't use (*branch) after this loop.
10345          */
10346         for (i = 0; i < pf->num_alloc_vsi; i++) {
10347                 if (!pf->vsi[i])
10348                         continue;
10349                 if (pf->vsi[i]->uplink_seid == branch_seid &&
10350                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
10351                         i40e_vsi_release(pf->vsi[i]);
10352                 }
10353         }
10354
10355         /* There's one corner case where the VEB might not have been
10356          * removed, so double check it here and remove it if needed.
10357          * This case happens if the veb was created from the debugfs
10358          * commands and no VSIs were added to it.
10359          */
10360         if (pf->veb[veb_idx])
10361                 i40e_veb_release(pf->veb[veb_idx]);
10362 }
10363
10364 /**
10365  * i40e_veb_clear - remove veb struct
10366  * @veb: the veb to remove
10367  **/
10368 static void i40e_veb_clear(struct i40e_veb *veb)
10369 {
10370         if (!veb)
10371                 return;
10372
10373         if (veb->pf) {
10374                 struct i40e_pf *pf = veb->pf;
10375
10376                 mutex_lock(&pf->switch_mutex);
10377                 if (pf->veb[veb->idx] == veb)
10378                         pf->veb[veb->idx] = NULL;
10379                 mutex_unlock(&pf->switch_mutex);
10380         }
10381
10382         kfree(veb);
10383 }
10384
10385 /**
10386  * i40e_veb_release - Delete a VEB and free its resources
10387  * @veb: the VEB being removed
10388  **/
10389 void i40e_veb_release(struct i40e_veb *veb)
10390 {
10391         struct i40e_vsi *vsi = NULL;
10392         struct i40e_pf *pf;
10393         int i, n = 0;
10394
10395         pf = veb->pf;
10396
10397         /* find the remaining VSI and check for extras */
10398         for (i = 0; i < pf->num_alloc_vsi; i++) {
10399                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
10400                         n++;
10401                         vsi = pf->vsi[i];
10402                 }
10403         }
10404         if (n != 1) {
10405                 dev_info(&pf->pdev->dev,
10406                          "can't remove VEB %d with %d VSIs left\n",
10407                          veb->seid, n);
10408                 return;
10409         }
10410
10411         /* move the remaining VSI to uplink veb */
10412         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
10413         if (veb->uplink_seid) {
10414                 vsi->uplink_seid = veb->uplink_seid;
10415                 if (veb->uplink_seid == pf->mac_seid)
10416                         vsi->veb_idx = I40E_NO_VEB;
10417                 else
10418                         vsi->veb_idx = veb->veb_idx;
10419         } else {
10420                 /* floating VEB */
10421                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
10422                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
10423         }
10424
10425         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
10426         i40e_veb_clear(veb);
10427 }
10428
10429 /**
10430  * i40e_add_veb - create the VEB in the switch
10431  * @veb: the VEB to be instantiated
10432  * @vsi: the controlling VSI
10433  **/
10434 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
10435 {
10436         struct i40e_pf *pf = veb->pf;
10437         bool enable_stats = !!(pf->flags & I40E_FLAG_VEB_STATS_ENABLED);
10438         int ret;
10439
10440         ret = i40e_aq_add_veb(&pf->hw, veb->uplink_seid, vsi->seid,
10441                               veb->enabled_tc, false,
10442                               &veb->seid, enable_stats, NULL);
10443
10444         /* get a VEB from the hardware */
10445         if (ret) {
10446                 dev_info(&pf->pdev->dev,
10447                          "couldn't add VEB, err %s aq_err %s\n",
10448                          i40e_stat_str(&pf->hw, ret),
10449                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10450                 return -EPERM;
10451         }
10452
10453         /* get statistics counter */
10454         ret = i40e_aq_get_veb_parameters(&pf->hw, veb->seid, NULL, NULL,
10455                                          &veb->stats_idx, NULL, NULL, NULL);
10456         if (ret) {
10457                 dev_info(&pf->pdev->dev,
10458                          "couldn't get VEB statistics idx, err %s aq_err %s\n",
10459                          i40e_stat_str(&pf->hw, ret),
10460                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10461                 return -EPERM;
10462         }
10463         ret = i40e_veb_get_bw_info(veb);
10464         if (ret) {
10465                 dev_info(&pf->pdev->dev,
10466                          "couldn't get VEB bw info, err %s aq_err %s\n",
10467                          i40e_stat_str(&pf->hw, ret),
10468                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10469                 i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
10470                 return -ENOENT;
10471         }
10472
10473         vsi->uplink_seid = veb->seid;
10474         vsi->veb_idx = veb->idx;
10475         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
10476
10477         return 0;
10478 }
10479
10480 /**
10481  * i40e_veb_setup - Set up a VEB
10482  * @pf: board private structure
10483  * @flags: VEB setup flags
10484  * @uplink_seid: the switch element to link to
10485  * @vsi_seid: the initial VSI seid
10486  * @enabled_tc: Enabled TC bit-map
10487  *
10488  * This allocates the sw VEB structure and links it into the switch
10489  * It is possible and legal for this to be a duplicate of an already
10490  * existing VEB.  It is also possible for both uplink and vsi seids
10491  * to be zero, in order to create a floating VEB.
10492  *
10493  * Returns pointer to the successfully allocated VEB sw struct on
10494  * success, otherwise returns NULL on failure.
10495  **/
10496 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
10497                                 u16 uplink_seid, u16 vsi_seid,
10498                                 u8 enabled_tc)
10499 {
10500         struct i40e_veb *veb, *uplink_veb = NULL;
10501         int vsi_idx, veb_idx;
10502         int ret;
10503
10504         /* if one seid is 0, the other must be 0 to create a floating relay */
10505         if ((uplink_seid == 0 || vsi_seid == 0) &&
10506             (uplink_seid + vsi_seid != 0)) {
10507                 dev_info(&pf->pdev->dev,
10508                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
10509                          uplink_seid, vsi_seid);
10510                 return NULL;
10511         }
10512
10513         /* make sure there is such a vsi and uplink */
10514         for (vsi_idx = 0; vsi_idx < pf->num_alloc_vsi; vsi_idx++)
10515                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
10516                         break;
10517         if (vsi_idx >= pf->num_alloc_vsi && vsi_seid != 0) {
10518                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
10519                          vsi_seid);
10520                 return NULL;
10521         }
10522
10523         if (uplink_seid && uplink_seid != pf->mac_seid) {
10524                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
10525                         if (pf->veb[veb_idx] &&
10526                             pf->veb[veb_idx]->seid == uplink_seid) {
10527                                 uplink_veb = pf->veb[veb_idx];
10528                                 break;
10529                         }
10530                 }
10531                 if (!uplink_veb) {
10532                         dev_info(&pf->pdev->dev,
10533                                  "uplink seid %d not found\n", uplink_seid);
10534                         return NULL;
10535                 }
10536         }
10537
10538         /* get veb sw struct */
10539         veb_idx = i40e_veb_mem_alloc(pf);
10540         if (veb_idx < 0)
10541                 goto err_alloc;
10542         veb = pf->veb[veb_idx];
10543         veb->flags = flags;
10544         veb->uplink_seid = uplink_seid;
10545         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
10546         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
10547
10548         /* create the VEB in the switch */
10549         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
10550         if (ret)
10551                 goto err_veb;
10552         if (vsi_idx == pf->lan_vsi)
10553                 pf->lan_veb = veb->idx;
10554
10555         return veb;
10556
10557 err_veb:
10558         i40e_veb_clear(veb);
10559 err_alloc:
10560         return NULL;
10561 }
10562
10563 /**
10564  * i40e_setup_pf_switch_element - set PF vars based on switch type
10565  * @pf: board private structure
10566  * @ele: element we are building info from
10567  * @num_reported: total number of elements
10568  * @printconfig: should we print the contents
10569  *
10570  * helper function to assist in extracting a few useful SEID values.
10571  **/
10572 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
10573                                 struct i40e_aqc_switch_config_element_resp *ele,
10574                                 u16 num_reported, bool printconfig)
10575 {
10576         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
10577         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
10578         u8 element_type = ele->element_type;
10579         u16 seid = le16_to_cpu(ele->seid);
10580
10581         if (printconfig)
10582                 dev_info(&pf->pdev->dev,
10583                          "type=%d seid=%d uplink=%d downlink=%d\n",
10584                          element_type, seid, uplink_seid, downlink_seid);
10585
10586         switch (element_type) {
10587         case I40E_SWITCH_ELEMENT_TYPE_MAC:
10588                 pf->mac_seid = seid;
10589                 break;
10590         case I40E_SWITCH_ELEMENT_TYPE_VEB:
10591                 /* Main VEB? */
10592                 if (uplink_seid != pf->mac_seid)
10593                         break;
10594                 if (pf->lan_veb == I40E_NO_VEB) {
10595                         int v;
10596
10597                         /* find existing or else empty VEB */
10598                         for (v = 0; v < I40E_MAX_VEB; v++) {
10599                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
10600                                         pf->lan_veb = v;
10601                                         break;
10602                                 }
10603                         }
10604                         if (pf->lan_veb == I40E_NO_VEB) {
10605                                 v = i40e_veb_mem_alloc(pf);
10606                                 if (v < 0)
10607                                         break;
10608                                 pf->lan_veb = v;
10609                         }
10610                 }
10611
10612                 pf->veb[pf->lan_veb]->seid = seid;
10613                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
10614                 pf->veb[pf->lan_veb]->pf = pf;
10615                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
10616                 break;
10617         case I40E_SWITCH_ELEMENT_TYPE_VSI:
10618                 if (num_reported != 1)
10619                         break;
10620                 /* This is immediately after a reset so we can assume this is
10621                  * the PF's VSI
10622                  */
10623                 pf->mac_seid = uplink_seid;
10624                 pf->pf_seid = downlink_seid;
10625                 pf->main_vsi_seid = seid;
10626                 if (printconfig)
10627                         dev_info(&pf->pdev->dev,
10628                                  "pf_seid=%d main_vsi_seid=%d\n",
10629                                  pf->pf_seid, pf->main_vsi_seid);
10630                 break;
10631         case I40E_SWITCH_ELEMENT_TYPE_PF:
10632         case I40E_SWITCH_ELEMENT_TYPE_VF:
10633         case I40E_SWITCH_ELEMENT_TYPE_EMP:
10634         case I40E_SWITCH_ELEMENT_TYPE_BMC:
10635         case I40E_SWITCH_ELEMENT_TYPE_PE:
10636         case I40E_SWITCH_ELEMENT_TYPE_PA:
10637                 /* ignore these for now */
10638                 break;
10639         default:
10640                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
10641                          element_type, seid);
10642                 break;
10643         }
10644 }
10645
10646 /**
10647  * i40e_fetch_switch_configuration - Get switch config from firmware
10648  * @pf: board private structure
10649  * @printconfig: should we print the contents
10650  *
10651  * Get the current switch configuration from the device and
10652  * extract a few useful SEID values.
10653  **/
10654 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
10655 {
10656         struct i40e_aqc_get_switch_config_resp *sw_config;
10657         u16 next_seid = 0;
10658         int ret = 0;
10659         u8 *aq_buf;
10660         int i;
10661
10662         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
10663         if (!aq_buf)
10664                 return -ENOMEM;
10665
10666         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
10667         do {
10668                 u16 num_reported, num_total;
10669
10670                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
10671                                                 I40E_AQ_LARGE_BUF,
10672                                                 &next_seid, NULL);
10673                 if (ret) {
10674                         dev_info(&pf->pdev->dev,
10675                                  "get switch config failed err %s aq_err %s\n",
10676                                  i40e_stat_str(&pf->hw, ret),
10677                                  i40e_aq_str(&pf->hw,
10678                                              pf->hw.aq.asq_last_status));
10679                         kfree(aq_buf);
10680                         return -ENOENT;
10681                 }
10682
10683                 num_reported = le16_to_cpu(sw_config->header.num_reported);
10684                 num_total = le16_to_cpu(sw_config->header.num_total);
10685
10686                 if (printconfig)
10687                         dev_info(&pf->pdev->dev,
10688                                  "header: %d reported %d total\n",
10689                                  num_reported, num_total);
10690
10691                 for (i = 0; i < num_reported; i++) {
10692                         struct i40e_aqc_switch_config_element_resp *ele =
10693                                 &sw_config->element[i];
10694
10695                         i40e_setup_pf_switch_element(pf, ele, num_reported,
10696                                                      printconfig);
10697                 }
10698         } while (next_seid != 0);
10699
10700         kfree(aq_buf);
10701         return ret;
10702 }
10703
10704 /**
10705  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
10706  * @pf: board private structure
10707  * @reinit: if the Main VSI needs to re-initialized.
10708  *
10709  * Returns 0 on success, negative value on failure
10710  **/
10711 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
10712 {
10713         u16 flags = 0;
10714         int ret;
10715
10716         /* find out what's out there already */
10717         ret = i40e_fetch_switch_configuration(pf, false);
10718         if (ret) {
10719                 dev_info(&pf->pdev->dev,
10720                          "couldn't fetch switch config, err %s aq_err %s\n",
10721                          i40e_stat_str(&pf->hw, ret),
10722                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
10723                 return ret;
10724         }
10725         i40e_pf_reset_stats(pf);
10726
10727         /* set the switch config bit for the whole device to
10728          * support limited promisc or true promisc
10729          * when user requests promisc. The default is limited
10730          * promisc.
10731         */
10732
10733         if ((pf->hw.pf_id == 0) &&
10734             !(pf->flags & I40E_FLAG_TRUE_PROMISC_SUPPORT))
10735                 flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;
10736
10737         if (pf->hw.pf_id == 0) {
10738                 u16 valid_flags;
10739
10740                 valid_flags = I40E_AQ_SET_SWITCH_CFG_PROMISC;
10741                 ret = i40e_aq_set_switch_config(&pf->hw, flags, valid_flags,
10742                                                 NULL);
10743                 if (ret && pf->hw.aq.asq_last_status != I40E_AQ_RC_ESRCH) {
10744                         dev_info(&pf->pdev->dev,
10745                                  "couldn't set switch config bits, err %s aq_err %s\n",
10746                                  i40e_stat_str(&pf->hw, ret),
10747                                  i40e_aq_str(&pf->hw,
10748                                              pf->hw.aq.asq_last_status));
10749                         /* not a fatal problem, just keep going */
10750                 }
10751         }
10752
10753         /* first time setup */
10754         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
10755                 struct i40e_vsi *vsi = NULL;
10756                 u16 uplink_seid;
10757
10758                 /* Set up the PF VSI associated with the PF's main VSI
10759                  * that is already in the HW switch
10760                  */
10761                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
10762                         uplink_seid = pf->veb[pf->lan_veb]->seid;
10763                 else
10764                         uplink_seid = pf->mac_seid;
10765                 if (pf->lan_vsi == I40E_NO_VSI)
10766                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
10767                 else if (reinit)
10768                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
10769                 if (!vsi) {
10770                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
10771                         i40e_fdir_teardown(pf);
10772                         return -EAGAIN;
10773                 }
10774         } else {
10775                 /* force a reset of TC and queue layout configurations */
10776                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
10777
10778                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
10779                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
10780                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
10781         }
10782         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
10783
10784         i40e_fdir_sb_setup(pf);
10785
10786         /* Setup static PF queue filter control settings */
10787         ret = i40e_setup_pf_filter_control(pf);
10788         if (ret) {
10789                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
10790                          ret);
10791                 /* Failure here should not stop continuing other steps */
10792         }
10793
10794         /* enable RSS in the HW, even for only one queue, as the stack can use
10795          * the hash
10796          */
10797         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
10798                 i40e_pf_config_rss(pf);
10799
10800         /* fill in link information and enable LSE reporting */
10801         i40e_link_event(pf);
10802
10803         /* Initialize user-specific link properties */
10804         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
10805                                   I40E_AQ_AN_COMPLETED) ? true : false);
10806
10807         i40e_ptp_init(pf);
10808
10809         return ret;
10810 }
10811
10812 /**
10813  * i40e_determine_queue_usage - Work out queue distribution
10814  * @pf: board private structure
10815  **/
10816 static void i40e_determine_queue_usage(struct i40e_pf *pf)
10817 {
10818         int queues_left;
10819
10820         pf->num_lan_qps = 0;
10821 #ifdef I40E_FCOE
10822         pf->num_fcoe_qps = 0;
10823 #endif
10824
10825         /* Find the max queues to be put into basic use.  We'll always be
10826          * using TC0, whether or not DCB is running, and TC0 will get the
10827          * big RSS set.
10828          */
10829         queues_left = pf->hw.func_caps.num_tx_qp;
10830
10831         if ((queues_left == 1) ||
10832             !(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
10833                 /* one qp for PF, no queues for anything else */
10834                 queues_left = 0;
10835                 pf->alloc_rss_size = pf->num_lan_qps = 1;
10836
10837                 /* make sure all the fancies are disabled */
10838                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
10839                                I40E_FLAG_IWARP_ENABLED  |
10840 #ifdef I40E_FCOE
10841                                I40E_FLAG_FCOE_ENABLED   |
10842 #endif
10843                                I40E_FLAG_FD_SB_ENABLED  |
10844                                I40E_FLAG_FD_ATR_ENABLED |
10845                                I40E_FLAG_DCB_CAPABLE    |
10846                                I40E_FLAG_DCB_ENABLED    |
10847                                I40E_FLAG_SRIOV_ENABLED  |
10848                                I40E_FLAG_VMDQ_ENABLED);
10849         } else if (!(pf->flags & (I40E_FLAG_RSS_ENABLED |
10850                                   I40E_FLAG_FD_SB_ENABLED |
10851                                   I40E_FLAG_FD_ATR_ENABLED |
10852                                   I40E_FLAG_DCB_CAPABLE))) {
10853                 /* one qp for PF */
10854                 pf->alloc_rss_size = pf->num_lan_qps = 1;
10855                 queues_left -= pf->num_lan_qps;
10856
10857                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
10858                                I40E_FLAG_IWARP_ENABLED  |
10859 #ifdef I40E_FCOE
10860                                I40E_FLAG_FCOE_ENABLED   |
10861 #endif
10862                                I40E_FLAG_FD_SB_ENABLED  |
10863                                I40E_FLAG_FD_ATR_ENABLED |
10864                                I40E_FLAG_DCB_ENABLED    |
10865                                I40E_FLAG_VMDQ_ENABLED);
10866         } else {
10867                 /* Not enough queues for all TCs */
10868                 if ((pf->flags & I40E_FLAG_DCB_CAPABLE) &&
10869                     (queues_left < I40E_MAX_TRAFFIC_CLASS)) {
10870                         pf->flags &= ~(I40E_FLAG_DCB_CAPABLE |
10871                                         I40E_FLAG_DCB_ENABLED);
10872                         dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
10873                 }
10874                 pf->num_lan_qps = max_t(int, pf->rss_size_max,
10875                                         num_online_cpus());
10876                 pf->num_lan_qps = min_t(int, pf->num_lan_qps,
10877                                         pf->hw.func_caps.num_tx_qp);
10878
10879                 queues_left -= pf->num_lan_qps;
10880         }
10881
10882 #ifdef I40E_FCOE
10883         if (pf->flags & I40E_FLAG_FCOE_ENABLED) {
10884                 if (I40E_DEFAULT_FCOE <= queues_left) {
10885                         pf->num_fcoe_qps = I40E_DEFAULT_FCOE;
10886                 } else if (I40E_MINIMUM_FCOE <= queues_left) {
10887                         pf->num_fcoe_qps = I40E_MINIMUM_FCOE;
10888                 } else {
10889                         pf->num_fcoe_qps = 0;
10890                         pf->flags &= ~I40E_FLAG_FCOE_ENABLED;
10891                         dev_info(&pf->pdev->dev, "not enough queues for FCoE. FCoE feature will be disabled\n");
10892                 }
10893
10894                 queues_left -= pf->num_fcoe_qps;
10895         }
10896
10897 #endif
10898         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
10899                 if (queues_left > 1) {
10900                         queues_left -= 1; /* save 1 queue for FD */
10901                 } else {
10902                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
10903                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
10904                 }
10905         }
10906
10907         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
10908             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
10909                 pf->num_req_vfs = min_t(int, pf->num_req_vfs,
10910                                         (queues_left / pf->num_vf_qps));
10911                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
10912         }
10913
10914         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
10915             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
10916                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
10917                                           (queues_left / pf->num_vmdq_qps));
10918                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
10919         }
10920
10921         pf->queues_left = queues_left;
10922         dev_dbg(&pf->pdev->dev,
10923                 "qs_avail=%d FD SB=%d lan_qs=%d lan_tc0=%d vf=%d*%d vmdq=%d*%d, remaining=%d\n",
10924                 pf->hw.func_caps.num_tx_qp,
10925                 !!(pf->flags & I40E_FLAG_FD_SB_ENABLED),
10926                 pf->num_lan_qps, pf->alloc_rss_size, pf->num_req_vfs,
10927                 pf->num_vf_qps, pf->num_vmdq_vsis, pf->num_vmdq_qps,
10928                 queues_left);
10929 #ifdef I40E_FCOE
10930         dev_dbg(&pf->pdev->dev, "fcoe queues = %d\n", pf->num_fcoe_qps);
10931 #endif
10932 }
10933
10934 /**
10935  * i40e_setup_pf_filter_control - Setup PF static filter control
10936  * @pf: PF to be setup
10937  *
10938  * i40e_setup_pf_filter_control sets up a PF's initial filter control
10939  * settings. If PE/FCoE are enabled then it will also set the per PF
10940  * based filter sizes required for them. It also enables Flow director,
10941  * ethertype and macvlan type filter settings for the pf.
10942  *
10943  * Returns 0 on success, negative on failure
10944  **/
10945 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
10946 {
10947         struct i40e_filter_control_settings *settings = &pf->filter_settings;
10948
10949         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
10950
10951         /* Flow Director is enabled */
10952         if (pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED))
10953                 settings->enable_fdir = true;
10954
10955         /* Ethtype and MACVLAN filters enabled for PF */
10956         settings->enable_ethtype = true;
10957         settings->enable_macvlan = true;
10958
10959         if (i40e_set_filter_control(&pf->hw, settings))
10960                 return -ENOENT;
10961
10962         return 0;
10963 }
10964
10965 #define INFO_STRING_LEN 255
10966 #define REMAIN(__x) (INFO_STRING_LEN - (__x))
10967 static void i40e_print_features(struct i40e_pf *pf)
10968 {
10969         struct i40e_hw *hw = &pf->hw;
10970         char *buf;
10971         int i;
10972
10973         buf = kmalloc(INFO_STRING_LEN, GFP_KERNEL);
10974         if (!buf)
10975                 return;
10976
10977         i = snprintf(buf, INFO_STRING_LEN, "Features: PF-id[%d]", hw->pf_id);
10978 #ifdef CONFIG_PCI_IOV
10979         i += snprintf(&buf[i], REMAIN(i), " VFs: %d", pf->num_req_vfs);
10980 #endif
10981         i += snprintf(&buf[i], REMAIN(i), " VSIs: %d QP: %d",
10982                       pf->hw.func_caps.num_vsis,
10983                       pf->vsi[pf->lan_vsi]->num_queue_pairs);
10984         if (pf->flags & I40E_FLAG_RSS_ENABLED)
10985                 i += snprintf(&buf[i], REMAIN(i), " RSS");
10986         if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
10987                 i += snprintf(&buf[i], REMAIN(i), " FD_ATR");
10988         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
10989                 i += snprintf(&buf[i], REMAIN(i), " FD_SB");
10990                 i += snprintf(&buf[i], REMAIN(i), " NTUPLE");
10991         }
10992         if (pf->flags & I40E_FLAG_DCB_CAPABLE)
10993                 i += snprintf(&buf[i], REMAIN(i), " DCB");
10994         i += snprintf(&buf[i], REMAIN(i), " VxLAN");
10995         i += snprintf(&buf[i], REMAIN(i), " Geneve");
10996         if (pf->flags & I40E_FLAG_PTP)
10997                 i += snprintf(&buf[i], REMAIN(i), " PTP");
10998 #ifdef I40E_FCOE
10999         if (pf->flags & I40E_FLAG_FCOE_ENABLED)
11000                 i += snprintf(&buf[i], REMAIN(i), " FCOE");
11001 #endif
11002         if (pf->flags & I40E_FLAG_VEB_MODE_ENABLED)
11003                 i += snprintf(&buf[i], REMAIN(i), " VEB");
11004         else
11005                 i += snprintf(&buf[i], REMAIN(i), " VEPA");
11006
11007         dev_info(&pf->pdev->dev, "%s\n", buf);
11008         kfree(buf);
11009         WARN_ON(i > INFO_STRING_LEN);
11010 }
11011
11012 /**
11013  * i40e_get_platform_mac_addr - get platform-specific MAC address
11014  *
11015  * @pdev: PCI device information struct
11016  * @pf: board private structure
11017  *
11018  * Look up the MAC address in Open Firmware  on systems that support it,
11019  * and use IDPROM on SPARC if no OF address is found. On return, the
11020  * I40E_FLAG_PF_MAC will be wset in pf->flags if a platform-specific value
11021  * has been selected.
11022  **/
11023 static void i40e_get_platform_mac_addr(struct pci_dev *pdev, struct i40e_pf *pf)
11024 {
11025         pf->flags &= ~I40E_FLAG_PF_MAC;
11026         if (!eth_platform_get_mac_address(&pdev->dev, pf->hw.mac.addr))
11027                 pf->flags |= I40E_FLAG_PF_MAC;
11028 }
11029
11030 /**
11031  * i40e_probe - Device initialization routine
11032  * @pdev: PCI device information struct
11033  * @ent: entry in i40e_pci_tbl
11034  *
11035  * i40e_probe initializes a PF identified by a pci_dev structure.
11036  * The OS initialization, configuring of the PF private structure,
11037  * and a hardware reset occur.
11038  *
11039  * Returns 0 on success, negative on failure
11040  **/
11041 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
11042 {
11043         struct i40e_aq_get_phy_abilities_resp abilities;
11044         struct i40e_pf *pf;
11045         struct i40e_hw *hw;
11046         static u16 pfs_found;
11047         u16 wol_nvm_bits;
11048         u16 link_status;
11049         int err;
11050         u32 val;
11051         u32 i;
11052         u8 set_fc_aq_fail;
11053
11054         err = pci_enable_device_mem(pdev);
11055         if (err)
11056                 return err;
11057
11058         /* set up for high or low dma */
11059         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
11060         if (err) {
11061                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
11062                 if (err) {
11063                         dev_err(&pdev->dev,
11064                                 "DMA configuration failed: 0x%x\n", err);
11065                         goto err_dma;
11066                 }
11067         }
11068
11069         /* set up pci connections */
11070         err = pci_request_mem_regions(pdev, i40e_driver_name);
11071         if (err) {
11072                 dev_info(&pdev->dev,
11073                          "pci_request_selected_regions failed %d\n", err);
11074                 goto err_pci_reg;
11075         }
11076
11077         pci_enable_pcie_error_reporting(pdev);
11078         pci_set_master(pdev);
11079
11080         /* Now that we have a PCI connection, we need to do the
11081          * low level device setup.  This is primarily setting up
11082          * the Admin Queue structures and then querying for the
11083          * device's current profile information.
11084          */
11085         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
11086         if (!pf) {
11087                 err = -ENOMEM;
11088                 goto err_pf_alloc;
11089         }
11090         pf->next_vsi = 0;
11091         pf->pdev = pdev;
11092         set_bit(__I40E_DOWN, &pf->state);
11093
11094         hw = &pf->hw;
11095         hw->back = pf;
11096
11097         pf->ioremap_len = min_t(int, pci_resource_len(pdev, 0),
11098                                 I40E_MAX_CSR_SPACE);
11099
11100         hw->hw_addr = ioremap(pci_resource_start(pdev, 0), pf->ioremap_len);
11101         if (!hw->hw_addr) {
11102                 err = -EIO;
11103                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
11104                          (unsigned int)pci_resource_start(pdev, 0),
11105                          pf->ioremap_len, err);
11106                 goto err_ioremap;
11107         }
11108         hw->vendor_id = pdev->vendor;
11109         hw->device_id = pdev->device;
11110         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
11111         hw->subsystem_vendor_id = pdev->subsystem_vendor;
11112         hw->subsystem_device_id = pdev->subsystem_device;
11113         hw->bus.device = PCI_SLOT(pdev->devfn);
11114         hw->bus.func = PCI_FUNC(pdev->devfn);
11115         hw->bus.bus_id = pdev->bus->number;
11116         pf->instance = pfs_found;
11117
11118         /* set up the locks for the AQ, do this only once in probe
11119          * and destroy them only once in remove
11120          */
11121         mutex_init(&hw->aq.asq_mutex);
11122         mutex_init(&hw->aq.arq_mutex);
11123
11124         pf->msg_enable = netif_msg_init(debug,
11125                                         NETIF_MSG_DRV |
11126                                         NETIF_MSG_PROBE |
11127                                         NETIF_MSG_LINK);
11128         if (debug < -1)
11129                 pf->hw.debug_mask = debug;
11130
11131         /* do a special CORER for clearing PXE mode once at init */
11132         if (hw->revision_id == 0 &&
11133             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
11134                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
11135                 i40e_flush(hw);
11136                 msleep(200);
11137                 pf->corer_count++;
11138
11139                 i40e_clear_pxe_mode(hw);
11140         }
11141
11142         /* Reset here to make sure all is clean and to define PF 'n' */
11143         i40e_clear_hw(hw);
11144         err = i40e_pf_reset(hw);
11145         if (err) {
11146                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
11147                 goto err_pf_reset;
11148         }
11149         pf->pfr_count++;
11150
11151         hw->aq.num_arq_entries = I40E_AQ_LEN;
11152         hw->aq.num_asq_entries = I40E_AQ_LEN;
11153         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
11154         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
11155         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
11156
11157         snprintf(pf->int_name, sizeof(pf->int_name) - 1,
11158                  "%s-%s:misc",
11159                  dev_driver_string(&pf->pdev->dev), dev_name(&pdev->dev));
11160
11161         err = i40e_init_shared_code(hw);
11162         if (err) {
11163                 dev_warn(&pdev->dev, "unidentified MAC or BLANK NVM: %d\n",
11164                          err);
11165                 goto err_pf_reset;
11166         }
11167
11168         /* set up a default setting for link flow control */
11169         pf->hw.fc.requested_mode = I40E_FC_NONE;
11170
11171         err = i40e_init_adminq(hw);
11172         if (err) {
11173                 if (err == I40E_ERR_FIRMWARE_API_VERSION)
11174                         dev_info(&pdev->dev,
11175                                  "The driver for the device stopped because the NVM image is newer than expected. You must install the most recent version of the network driver.\n");
11176                 else
11177                         dev_info(&pdev->dev,
11178                                  "The driver for the device stopped because the device firmware failed to init. Try updating your NVM image.\n");
11179
11180                 goto err_pf_reset;
11181         }
11182
11183         /* provide nvm, fw, api versions */
11184         dev_info(&pdev->dev, "fw %d.%d.%05d api %d.%d nvm %s\n",
11185                  hw->aq.fw_maj_ver, hw->aq.fw_min_ver, hw->aq.fw_build,
11186                  hw->aq.api_maj_ver, hw->aq.api_min_ver,
11187                  i40e_nvm_version_str(hw));
11188
11189         if (hw->aq.api_maj_ver == I40E_FW_API_VERSION_MAJOR &&
11190             hw->aq.api_min_ver > I40E_FW_API_VERSION_MINOR)
11191                 dev_info(&pdev->dev,
11192                          "The driver for the device detected a newer version of the NVM image than expected. Please install the most recent version of the network driver.\n");
11193         else if (hw->aq.api_maj_ver < I40E_FW_API_VERSION_MAJOR ||
11194                  hw->aq.api_min_ver < (I40E_FW_API_VERSION_MINOR - 1))
11195                 dev_info(&pdev->dev,
11196                          "The driver for the device detected an older version of the NVM image than expected. Please update the NVM image.\n");
11197
11198         i40e_verify_eeprom(pf);
11199
11200         /* Rev 0 hardware was never productized */
11201         if (hw->revision_id < 1)
11202                 dev_warn(&pdev->dev, "This device is a pre-production adapter/LOM. Please be aware there may be issues with your hardware. If you are experiencing problems please contact your Intel or hardware representative who provided you with this hardware.\n");
11203
11204         i40e_clear_pxe_mode(hw);
11205         err = i40e_get_capabilities(pf);
11206         if (err)
11207                 goto err_adminq_setup;
11208
11209         err = i40e_sw_init(pf);
11210         if (err) {
11211                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
11212                 goto err_sw_init;
11213         }
11214
11215         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
11216                                 hw->func_caps.num_rx_qp,
11217                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
11218         if (err) {
11219                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
11220                 goto err_init_lan_hmc;
11221         }
11222
11223         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
11224         if (err) {
11225                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
11226                 err = -ENOENT;
11227                 goto err_configure_lan_hmc;
11228         }
11229
11230         /* Disable LLDP for NICs that have firmware versions lower than v4.3.
11231          * Ignore error return codes because if it was already disabled via
11232          * hardware settings this will fail
11233          */
11234         if (pf->flags & I40E_FLAG_STOP_FW_LLDP) {
11235                 dev_info(&pdev->dev, "Stopping firmware LLDP agent.\n");
11236                 i40e_aq_stop_lldp(hw, true, NULL);
11237         }
11238
11239         i40e_get_mac_addr(hw, hw->mac.addr);
11240         /* allow a platform config to override the HW addr */
11241         i40e_get_platform_mac_addr(pdev, pf);
11242         if (!is_valid_ether_addr(hw->mac.addr)) {
11243                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
11244                 err = -EIO;
11245                 goto err_mac_addr;
11246         }
11247         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
11248         ether_addr_copy(hw->mac.perm_addr, hw->mac.addr);
11249         i40e_get_port_mac_addr(hw, hw->mac.port_addr);
11250         if (is_valid_ether_addr(hw->mac.port_addr))
11251                 pf->flags |= I40E_FLAG_PORT_ID_VALID;
11252 #ifdef I40E_FCOE
11253         err = i40e_get_san_mac_addr(hw, hw->mac.san_addr);
11254         if (err)
11255                 dev_info(&pdev->dev,
11256                          "(non-fatal) SAN MAC retrieval failed: %d\n", err);
11257         if (!is_valid_ether_addr(hw->mac.san_addr)) {
11258                 dev_warn(&pdev->dev, "invalid SAN MAC address %pM, falling back to LAN MAC\n",
11259                          hw->mac.san_addr);
11260                 ether_addr_copy(hw->mac.san_addr, hw->mac.addr);
11261         }
11262         dev_info(&pf->pdev->dev, "SAN MAC: %pM\n", hw->mac.san_addr);
11263 #endif /* I40E_FCOE */
11264
11265         pci_set_drvdata(pdev, pf);
11266         pci_save_state(pdev);
11267 #ifdef CONFIG_I40E_DCB
11268         err = i40e_init_pf_dcb(pf);
11269         if (err) {
11270                 dev_info(&pdev->dev, "DCB init failed %d, disabled\n", err);
11271                 pf->flags &= ~(I40E_FLAG_DCB_CAPABLE | I40E_FLAG_DCB_ENABLED);
11272                 /* Continue without DCB enabled */
11273         }
11274 #endif /* CONFIG_I40E_DCB */
11275
11276         /* set up periodic task facility */
11277         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
11278         pf->service_timer_period = HZ;
11279
11280         INIT_WORK(&pf->service_task, i40e_service_task);
11281         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
11282         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
11283
11284         /* NVM bit on means WoL disabled for the port */
11285         i40e_read_nvm_word(hw, I40E_SR_NVM_WAKE_ON_LAN, &wol_nvm_bits);
11286         if (BIT (hw->port) & wol_nvm_bits || hw->partition_id != 1)
11287                 pf->wol_en = false;
11288         else
11289                 pf->wol_en = true;
11290         device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
11291
11292         /* set up the main switch operations */
11293         i40e_determine_queue_usage(pf);
11294         err = i40e_init_interrupt_scheme(pf);
11295         if (err)
11296                 goto err_switch_setup;
11297
11298         /* The number of VSIs reported by the FW is the minimum guaranteed
11299          * to us; HW supports far more and we share the remaining pool with
11300          * the other PFs. We allocate space for more than the guarantee with
11301          * the understanding that we might not get them all later.
11302          */
11303         if (pf->hw.func_caps.num_vsis < I40E_MIN_VSI_ALLOC)
11304                 pf->num_alloc_vsi = I40E_MIN_VSI_ALLOC;
11305         else
11306                 pf->num_alloc_vsi = pf->hw.func_caps.num_vsis;
11307
11308         /* Set up the *vsi struct and our local tracking of the MAIN PF vsi. */
11309         pf->vsi = kcalloc(pf->num_alloc_vsi, sizeof(struct i40e_vsi *),
11310                           GFP_KERNEL);
11311         if (!pf->vsi) {
11312                 err = -ENOMEM;
11313                 goto err_switch_setup;
11314         }
11315
11316 #ifdef CONFIG_PCI_IOV
11317         /* prep for VF support */
11318         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
11319             (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
11320             !test_bit(__I40E_BAD_EEPROM, &pf->state)) {
11321                 if (pci_num_vf(pdev))
11322                         pf->flags |= I40E_FLAG_VEB_MODE_ENABLED;
11323         }
11324 #endif
11325         err = i40e_setup_pf_switch(pf, false);
11326         if (err) {
11327                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
11328                 goto err_vsis;
11329         }
11330
11331         /* Make sure flow control is set according to current settings */
11332         err = i40e_set_fc(hw, &set_fc_aq_fail, true);
11333         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_GET)
11334                 dev_dbg(&pf->pdev->dev,
11335                         "Set fc with err %s aq_err %s on get_phy_cap\n",
11336                         i40e_stat_str(hw, err),
11337                         i40e_aq_str(hw, hw->aq.asq_last_status));
11338         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_SET)
11339                 dev_dbg(&pf->pdev->dev,
11340                         "Set fc with err %s aq_err %s on set_phy_config\n",
11341                         i40e_stat_str(hw, err),
11342                         i40e_aq_str(hw, hw->aq.asq_last_status));
11343         if (set_fc_aq_fail & I40E_SET_FC_AQ_FAIL_UPDATE)
11344                 dev_dbg(&pf->pdev->dev,
11345                         "Set fc with err %s aq_err %s on get_link_info\n",
11346                         i40e_stat_str(hw, err),
11347                         i40e_aq_str(hw, hw->aq.asq_last_status));
11348
11349         /* if FDIR VSI was set up, start it now */
11350         for (i = 0; i < pf->num_alloc_vsi; i++) {
11351                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
11352                         i40e_vsi_open(pf->vsi[i]);
11353                         break;
11354                 }
11355         }
11356
11357         /* The driver only wants link up/down and module qualification
11358          * reports from firmware.  Note the negative logic.
11359          */
11360         err = i40e_aq_set_phy_int_mask(&pf->hw,
11361                                        ~(I40E_AQ_EVENT_LINK_UPDOWN |
11362                                          I40E_AQ_EVENT_MEDIA_NA |
11363                                          I40E_AQ_EVENT_MODULE_QUAL_FAIL), NULL);
11364         if (err)
11365                 dev_info(&pf->pdev->dev, "set phy mask fail, err %s aq_err %s\n",
11366                          i40e_stat_str(&pf->hw, err),
11367                          i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
11368
11369         /* Reconfigure hardware for allowing smaller MSS in the case
11370          * of TSO, so that we avoid the MDD being fired and causing
11371          * a reset in the case of small MSS+TSO.
11372          */
11373         val = rd32(hw, I40E_REG_MSS);
11374         if ((val & I40E_REG_MSS_MIN_MASK) > I40E_64BYTE_MSS) {
11375                 val &= ~I40E_REG_MSS_MIN_MASK;
11376                 val |= I40E_64BYTE_MSS;
11377                 wr32(hw, I40E_REG_MSS, val);
11378         }
11379
11380         if (pf->flags & I40E_FLAG_RESTART_AUTONEG) {
11381                 msleep(75);
11382                 err = i40e_aq_set_link_restart_an(&pf->hw, true, NULL);
11383                 if (err)
11384                         dev_info(&pf->pdev->dev, "link restart failed, err %s aq_err %s\n",
11385                                  i40e_stat_str(&pf->hw, err),
11386                                  i40e_aq_str(&pf->hw,
11387                                              pf->hw.aq.asq_last_status));
11388         }
11389         /* The main driver is (mostly) up and happy. We need to set this state
11390          * before setting up the misc vector or we get a race and the vector
11391          * ends up disabled forever.
11392          */
11393         clear_bit(__I40E_DOWN, &pf->state);
11394
11395         /* In case of MSIX we are going to setup the misc vector right here
11396          * to handle admin queue events etc. In case of legacy and MSI
11397          * the misc functionality and queue processing is combined in
11398          * the same vector and that gets setup at open.
11399          */
11400         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
11401                 err = i40e_setup_misc_vector(pf);
11402                 if (err) {
11403                         dev_info(&pdev->dev,
11404                                  "setup of misc vector failed: %d\n", err);
11405                         goto err_vsis;
11406                 }
11407         }
11408
11409 #ifdef CONFIG_PCI_IOV
11410         /* prep for VF support */
11411         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
11412             (pf->flags & I40E_FLAG_MSIX_ENABLED) &&
11413             !test_bit(__I40E_BAD_EEPROM, &pf->state)) {
11414                 /* disable link interrupts for VFs */
11415                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
11416                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
11417                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
11418                 i40e_flush(hw);
11419
11420                 if (pci_num_vf(pdev)) {
11421                         dev_info(&pdev->dev,
11422                                  "Active VFs found, allocating resources.\n");
11423                         err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
11424                         if (err)
11425                                 dev_info(&pdev->dev,
11426                                          "Error %d allocating resources for existing VFs\n",
11427                                          err);
11428                 }
11429         }
11430 #endif /* CONFIG_PCI_IOV */
11431
11432         if (pf->flags & I40E_FLAG_IWARP_ENABLED) {
11433                 pf->iwarp_base_vector = i40e_get_lump(pf, pf->irq_pile,
11434                                                       pf->num_iwarp_msix,
11435                                                       I40E_IWARP_IRQ_PILE_ID);
11436                 if (pf->iwarp_base_vector < 0) {
11437                         dev_info(&pdev->dev,
11438                                  "failed to get tracking for %d vectors for IWARP err=%d\n",
11439                                  pf->num_iwarp_msix, pf->iwarp_base_vector);
11440                         pf->flags &= ~I40E_FLAG_IWARP_ENABLED;
11441                 }
11442         }
11443
11444         i40e_dbg_pf_init(pf);
11445
11446         /* tell the firmware that we're starting */
11447         i40e_send_version(pf);
11448
11449         /* since everything's happy, start the service_task timer */
11450         mod_timer(&pf->service_timer,
11451                   round_jiffies(jiffies + pf->service_timer_period));
11452
11453         /* add this PF to client device list and launch a client service task */
11454         err = i40e_lan_add_device(pf);
11455         if (err)
11456                 dev_info(&pdev->dev, "Failed to add PF to client API service list: %d\n",
11457                          err);
11458
11459 #ifdef I40E_FCOE
11460         /* create FCoE interface */
11461         i40e_fcoe_vsi_setup(pf);
11462
11463 #endif
11464 #define PCI_SPEED_SIZE 8
11465 #define PCI_WIDTH_SIZE 8
11466         /* Devices on the IOSF bus do not have this information
11467          * and will report PCI Gen 1 x 1 by default so don't bother
11468          * checking them.
11469          */
11470         if (!(pf->flags & I40E_FLAG_NO_PCI_LINK_CHECK)) {
11471                 char speed[PCI_SPEED_SIZE] = "Unknown";
11472                 char width[PCI_WIDTH_SIZE] = "Unknown";
11473
11474                 /* Get the negotiated link width and speed from PCI config
11475                  * space
11476                  */
11477                 pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA,
11478                                           &link_status);
11479
11480                 i40e_set_pci_config_data(hw, link_status);
11481
11482                 switch (hw->bus.speed) {
11483                 case i40e_bus_speed_8000:
11484                         strncpy(speed, "8.0", PCI_SPEED_SIZE); break;
11485                 case i40e_bus_speed_5000:
11486                         strncpy(speed, "5.0", PCI_SPEED_SIZE); break;
11487                 case i40e_bus_speed_2500:
11488                         strncpy(speed, "2.5", PCI_SPEED_SIZE); break;
11489                 default:
11490                         break;
11491                 }
11492                 switch (hw->bus.width) {
11493                 case i40e_bus_width_pcie_x8:
11494                         strncpy(width, "8", PCI_WIDTH_SIZE); break;
11495                 case i40e_bus_width_pcie_x4:
11496                         strncpy(width, "4", PCI_WIDTH_SIZE); break;
11497                 case i40e_bus_width_pcie_x2:
11498                         strncpy(width, "2", PCI_WIDTH_SIZE); break;
11499                 case i40e_bus_width_pcie_x1:
11500                         strncpy(width, "1", PCI_WIDTH_SIZE); break;
11501                 default:
11502                         break;
11503                 }
11504
11505                 dev_info(&pdev->dev, "PCI-Express: Speed %sGT/s Width x%s\n",
11506                          speed, width);
11507
11508                 if (hw->bus.width < i40e_bus_width_pcie_x8 ||
11509                     hw->bus.speed < i40e_bus_speed_8000) {
11510                         dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
11511                         dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
11512                 }
11513         }
11514
11515         /* get the requested speeds from the fw */
11516         err = i40e_aq_get_phy_capabilities(hw, false, false, &abilities, NULL);
11517         if (err)
11518                 dev_dbg(&pf->pdev->dev, "get requested speeds ret =  %s last_status =  %s\n",
11519                         i40e_stat_str(&pf->hw, err),
11520                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
11521         pf->hw.phy.link_info.requested_speeds = abilities.link_speed;
11522
11523         /* get the supported phy types from the fw */
11524         err = i40e_aq_get_phy_capabilities(hw, false, true, &abilities, NULL);
11525         if (err)
11526                 dev_dbg(&pf->pdev->dev, "get supported phy types ret =  %s last_status =  %s\n",
11527                         i40e_stat_str(&pf->hw, err),
11528                         i40e_aq_str(&pf->hw, pf->hw.aq.asq_last_status));
11529
11530         /* Add a filter to drop all Flow control frames from any VSI from being
11531          * transmitted. By doing so we stop a malicious VF from sending out
11532          * PAUSE or PFC frames and potentially controlling traffic for other
11533          * PF/VF VSIs.
11534          * The FW can still send Flow control frames if enabled.
11535          */
11536         i40e_add_filter_to_drop_tx_flow_control_frames(&pf->hw,
11537                                                        pf->main_vsi_seid);
11538
11539         if ((pf->hw.device_id == I40E_DEV_ID_10G_BASE_T) ||
11540                 (pf->hw.device_id == I40E_DEV_ID_10G_BASE_T4))
11541                 pf->flags |= I40E_FLAG_PHY_CONTROLS_LEDS;
11542         if (pf->hw.device_id == I40E_DEV_ID_SFP_I_X722)
11543                 pf->flags |= I40E_FLAG_HAVE_CRT_RETIMER;
11544         /* print a string summarizing features */
11545         i40e_print_features(pf);
11546
11547         return 0;
11548
11549         /* Unwind what we've done if something failed in the setup */
11550 err_vsis:
11551         set_bit(__I40E_DOWN, &pf->state);
11552         i40e_clear_interrupt_scheme(pf);
11553         kfree(pf->vsi);
11554 err_switch_setup:
11555         i40e_reset_interrupt_capability(pf);
11556         del_timer_sync(&pf->service_timer);
11557 err_mac_addr:
11558 err_configure_lan_hmc:
11559         (void)i40e_shutdown_lan_hmc(hw);
11560 err_init_lan_hmc:
11561         kfree(pf->qp_pile);
11562 err_sw_init:
11563 err_adminq_setup:
11564 err_pf_reset:
11565         iounmap(hw->hw_addr);
11566 err_ioremap:
11567         kfree(pf);
11568 err_pf_alloc:
11569         pci_disable_pcie_error_reporting(pdev);
11570         pci_release_mem_regions(pdev);
11571 err_pci_reg:
11572 err_dma:
11573         pci_disable_device(pdev);
11574         return err;
11575 }
11576
11577 /**
11578  * i40e_remove - Device removal routine
11579  * @pdev: PCI device information struct
11580  *
11581  * i40e_remove is called by the PCI subsystem to alert the driver
11582  * that is should release a PCI device.  This could be caused by a
11583  * Hot-Plug event, or because the driver is going to be removed from
11584  * memory.
11585  **/
11586 static void i40e_remove(struct pci_dev *pdev)
11587 {
11588         struct i40e_pf *pf = pci_get_drvdata(pdev);
11589         struct i40e_hw *hw = &pf->hw;
11590         i40e_status ret_code;
11591         int i;
11592
11593         i40e_dbg_pf_exit(pf);
11594
11595         i40e_ptp_stop(pf);
11596
11597         /* Disable RSS in hw */
11598         i40e_write_rx_ctl(hw, I40E_PFQF_HENA(0), 0);
11599         i40e_write_rx_ctl(hw, I40E_PFQF_HENA(1), 0);
11600
11601         /* no more scheduling of any task */
11602         set_bit(__I40E_SUSPENDED, &pf->state);
11603         set_bit(__I40E_DOWN, &pf->state);
11604         if (pf->service_timer.data)
11605                 del_timer_sync(&pf->service_timer);
11606         if (pf->service_task.func)
11607                 cancel_work_sync(&pf->service_task);
11608
11609         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
11610                 i40e_free_vfs(pf);
11611                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
11612         }
11613
11614         i40e_fdir_teardown(pf);
11615
11616         /* If there is a switch structure or any orphans, remove them.
11617          * This will leave only the PF's VSI remaining.
11618          */
11619         for (i = 0; i < I40E_MAX_VEB; i++) {
11620                 if (!pf->veb[i])
11621                         continue;
11622
11623                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
11624                     pf->veb[i]->uplink_seid == 0)
11625                         i40e_switch_branch_release(pf->veb[i]);
11626         }
11627
11628         /* Now we can shutdown the PF's VSI, just before we kill
11629          * adminq and hmc.
11630          */
11631         if (pf->vsi[pf->lan_vsi])
11632                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
11633
11634         /* remove attached clients */
11635         ret_code = i40e_lan_del_device(pf);
11636         if (ret_code) {
11637                 dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
11638                          ret_code);
11639         }
11640
11641         /* shutdown and destroy the HMC */
11642         if (hw->hmc.hmc_obj) {
11643                 ret_code = i40e_shutdown_lan_hmc(hw);
11644                 if (ret_code)
11645                         dev_warn(&pdev->dev,
11646                                  "Failed to destroy the HMC resources: %d\n",
11647                                  ret_code);
11648         }
11649
11650         /* shutdown the adminq */
11651         i40e_shutdown_adminq(hw);
11652
11653         /* destroy the locks only once, here */
11654         mutex_destroy(&hw->aq.arq_mutex);
11655         mutex_destroy(&hw->aq.asq_mutex);
11656
11657         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
11658         i40e_clear_interrupt_scheme(pf);
11659         for (i = 0; i < pf->num_alloc_vsi; i++) {
11660                 if (pf->vsi[i]) {
11661                         i40e_vsi_clear_rings(pf->vsi[i]);
11662                         i40e_vsi_clear(pf->vsi[i]);
11663                         pf->vsi[i] = NULL;
11664                 }
11665         }
11666
11667         for (i = 0; i < I40E_MAX_VEB; i++) {
11668                 kfree(pf->veb[i]);
11669                 pf->veb[i] = NULL;
11670         }
11671
11672         kfree(pf->qp_pile);
11673         kfree(pf->vsi);
11674
11675         iounmap(hw->hw_addr);
11676         kfree(pf);
11677         pci_release_mem_regions(pdev);
11678
11679         pci_disable_pcie_error_reporting(pdev);
11680         pci_disable_device(pdev);
11681 }
11682
11683 /**
11684  * i40e_pci_error_detected - warning that something funky happened in PCI land
11685  * @pdev: PCI device information struct
11686  *
11687  * Called to warn that something happened and the error handling steps
11688  * are in progress.  Allows the driver to quiesce things, be ready for
11689  * remediation.
11690  **/
11691 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
11692                                                 enum pci_channel_state error)
11693 {
11694         struct i40e_pf *pf = pci_get_drvdata(pdev);
11695
11696         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
11697
11698         if (!pf) {
11699                 dev_info(&pdev->dev,
11700                          "Cannot recover - error happened during device probe\n");
11701                 return PCI_ERS_RESULT_DISCONNECT;
11702         }
11703
11704         /* shutdown all operations */
11705         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
11706                 rtnl_lock();
11707                 i40e_prep_for_reset(pf);
11708                 rtnl_unlock();
11709         }
11710
11711         /* Request a slot reset */
11712         return PCI_ERS_RESULT_NEED_RESET;
11713 }
11714
11715 /**
11716  * i40e_pci_error_slot_reset - a PCI slot reset just happened
11717  * @pdev: PCI device information struct
11718  *
11719  * Called to find if the driver can work with the device now that
11720  * the pci slot has been reset.  If a basic connection seems good
11721  * (registers are readable and have sane content) then return a
11722  * happy little PCI_ERS_RESULT_xxx.
11723  **/
11724 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
11725 {
11726         struct i40e_pf *pf = pci_get_drvdata(pdev);
11727         pci_ers_result_t result;
11728         int err;
11729         u32 reg;
11730
11731         dev_dbg(&pdev->dev, "%s\n", __func__);
11732         if (pci_enable_device_mem(pdev)) {
11733                 dev_info(&pdev->dev,
11734                          "Cannot re-enable PCI device after reset.\n");
11735                 result = PCI_ERS_RESULT_DISCONNECT;
11736         } else {
11737                 pci_set_master(pdev);
11738                 pci_restore_state(pdev);
11739                 pci_save_state(pdev);
11740                 pci_wake_from_d3(pdev, false);
11741
11742                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
11743                 if (reg == 0)
11744                         result = PCI_ERS_RESULT_RECOVERED;
11745                 else
11746                         result = PCI_ERS_RESULT_DISCONNECT;
11747         }
11748
11749         err = pci_cleanup_aer_uncorrect_error_status(pdev);
11750         if (err) {
11751                 dev_info(&pdev->dev,
11752                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
11753                          err);
11754                 /* non-fatal, continue */
11755         }
11756
11757         return result;
11758 }
11759
11760 /**
11761  * i40e_pci_error_resume - restart operations after PCI error recovery
11762  * @pdev: PCI device information struct
11763  *
11764  * Called to allow the driver to bring things back up after PCI error
11765  * and/or reset recovery has finished.
11766  **/
11767 static void i40e_pci_error_resume(struct pci_dev *pdev)
11768 {
11769         struct i40e_pf *pf = pci_get_drvdata(pdev);
11770
11771         dev_dbg(&pdev->dev, "%s\n", __func__);
11772         if (test_bit(__I40E_SUSPENDED, &pf->state))
11773                 return;
11774
11775         rtnl_lock();
11776         i40e_handle_reset_warning(pf);
11777         rtnl_unlock();
11778 }
11779
11780 /**
11781  * i40e_enable_mc_magic_wake - enable multicast magic packet wake up
11782  * using the mac_address_write admin q function
11783  * @pf: pointer to i40e_pf struct
11784  **/
11785 static void i40e_enable_mc_magic_wake(struct i40e_pf *pf)
11786 {
11787         struct i40e_hw *hw = &pf->hw;
11788         i40e_status ret;
11789         u8 mac_addr[6];
11790         u16 flags = 0;
11791
11792         /* Get current MAC address in case it's an LAA */
11793         if (pf->vsi[pf->lan_vsi] && pf->vsi[pf->lan_vsi]->netdev) {
11794                 ether_addr_copy(mac_addr,
11795                                 pf->vsi[pf->lan_vsi]->netdev->dev_addr);
11796         } else {
11797                 dev_err(&pf->pdev->dev,
11798                         "Failed to retrieve MAC address; using default\n");
11799                 ether_addr_copy(mac_addr, hw->mac.addr);
11800         }
11801
11802         /* The FW expects the mac address write cmd to first be called with
11803          * one of these flags before calling it again with the multicast
11804          * enable flags.
11805          */
11806         flags = I40E_AQC_WRITE_TYPE_LAA_WOL;
11807
11808         if (hw->func_caps.flex10_enable && hw->partition_id != 1)
11809                 flags = I40E_AQC_WRITE_TYPE_LAA_ONLY;
11810
11811         ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
11812         if (ret) {
11813                 dev_err(&pf->pdev->dev,
11814                         "Failed to update MAC address registers; cannot enable Multicast Magic packet wake up");
11815                 return;
11816         }
11817
11818         flags = I40E_AQC_MC_MAG_EN
11819                         | I40E_AQC_WOL_PRESERVE_ON_PFR
11820                         | I40E_AQC_WRITE_TYPE_UPDATE_MC_MAG;
11821         ret = i40e_aq_mac_address_write(hw, flags, mac_addr, NULL);
11822         if (ret)
11823                 dev_err(&pf->pdev->dev,
11824                         "Failed to enable Multicast Magic Packet wake up\n");
11825 }
11826
11827 /**
11828  * i40e_shutdown - PCI callback for shutting down
11829  * @pdev: PCI device information struct
11830  **/
11831 static void i40e_shutdown(struct pci_dev *pdev)
11832 {
11833         struct i40e_pf *pf = pci_get_drvdata(pdev);
11834         struct i40e_hw *hw = &pf->hw;
11835
11836         set_bit(__I40E_SUSPENDED, &pf->state);
11837         set_bit(__I40E_DOWN, &pf->state);
11838         rtnl_lock();
11839         i40e_prep_for_reset(pf);
11840         rtnl_unlock();
11841
11842         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11843         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11844
11845         del_timer_sync(&pf->service_timer);
11846         cancel_work_sync(&pf->service_task);
11847         i40e_fdir_teardown(pf);
11848
11849         if (pf->wol_en && (pf->flags & I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE))
11850                 i40e_enable_mc_magic_wake(pf);
11851
11852         rtnl_lock();
11853         i40e_prep_for_reset(pf);
11854         rtnl_unlock();
11855
11856         wr32(hw, I40E_PFPM_APM,
11857              (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11858         wr32(hw, I40E_PFPM_WUFC,
11859              (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11860
11861         i40e_clear_interrupt_scheme(pf);
11862
11863         if (system_state == SYSTEM_POWER_OFF) {
11864                 pci_wake_from_d3(pdev, pf->wol_en);
11865                 pci_set_power_state(pdev, PCI_D3hot);
11866         }
11867 }
11868
11869 #ifdef CONFIG_PM
11870 /**
11871  * i40e_suspend - PCI callback for moving to D3
11872  * @pdev: PCI device information struct
11873  **/
11874 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
11875 {
11876         struct i40e_pf *pf = pci_get_drvdata(pdev);
11877         struct i40e_hw *hw = &pf->hw;
11878         int retval = 0;
11879
11880         set_bit(__I40E_SUSPENDED, &pf->state);
11881         set_bit(__I40E_DOWN, &pf->state);
11882
11883         if (pf->wol_en && (pf->flags & I40E_FLAG_WOL_MC_MAGIC_PKT_WAKE))
11884                 i40e_enable_mc_magic_wake(pf);
11885
11886         rtnl_lock();
11887         i40e_prep_for_reset(pf);
11888         rtnl_unlock();
11889
11890         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
11891         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
11892
11893         i40e_stop_misc_vector(pf);
11894
11895         retval = pci_save_state(pdev);
11896         if (retval)
11897                 return retval;
11898
11899         pci_wake_from_d3(pdev, pf->wol_en);
11900         pci_set_power_state(pdev, PCI_D3hot);
11901
11902         return retval;
11903 }
11904
11905 /**
11906  * i40e_resume - PCI callback for waking up from D3
11907  * @pdev: PCI device information struct
11908  **/
11909 static int i40e_resume(struct pci_dev *pdev)
11910 {
11911         struct i40e_pf *pf = pci_get_drvdata(pdev);
11912         u32 err;
11913
11914         pci_set_power_state(pdev, PCI_D0);
11915         pci_restore_state(pdev);
11916         /* pci_restore_state() clears dev->state_saves, so
11917          * call pci_save_state() again to restore it.
11918          */
11919         pci_save_state(pdev);
11920
11921         err = pci_enable_device_mem(pdev);
11922         if (err) {
11923                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
11924                 return err;
11925         }
11926         pci_set_master(pdev);
11927
11928         /* no wakeup events while running */
11929         pci_wake_from_d3(pdev, false);
11930
11931         /* handling the reset will rebuild the device state */
11932         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
11933                 clear_bit(__I40E_DOWN, &pf->state);
11934                 rtnl_lock();
11935                 i40e_reset_and_rebuild(pf, false);
11936                 rtnl_unlock();
11937         }
11938
11939         return 0;
11940 }
11941
11942 #endif
11943 static const struct pci_error_handlers i40e_err_handler = {
11944         .error_detected = i40e_pci_error_detected,
11945         .slot_reset = i40e_pci_error_slot_reset,
11946         .resume = i40e_pci_error_resume,
11947 };
11948
11949 static struct pci_driver i40e_driver = {
11950         .name     = i40e_driver_name,
11951         .id_table = i40e_pci_tbl,
11952         .probe    = i40e_probe,
11953         .remove   = i40e_remove,
11954 #ifdef CONFIG_PM
11955         .suspend  = i40e_suspend,
11956         .resume   = i40e_resume,
11957 #endif
11958         .shutdown = i40e_shutdown,
11959         .err_handler = &i40e_err_handler,
11960         .sriov_configure = i40e_pci_sriov_configure,
11961 };
11962
11963 /**
11964  * i40e_init_module - Driver registration routine
11965  *
11966  * i40e_init_module is the first routine called when the driver is
11967  * loaded. All it does is register with the PCI subsystem.
11968  **/
11969 static int __init i40e_init_module(void)
11970 {
11971         pr_info("%s: %s - version %s\n", i40e_driver_name,
11972                 i40e_driver_string, i40e_driver_version_str);
11973         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
11974
11975         /* we will see if single thread per module is enough for now,
11976          * it can't be any worse than using the system workqueue which
11977          * was already single threaded
11978          */
11979         i40e_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
11980                                   i40e_driver_name);
11981         if (!i40e_wq) {
11982                 pr_err("%s: Failed to create workqueue\n", i40e_driver_name);
11983                 return -ENOMEM;
11984         }
11985
11986         i40e_dbg_init();
11987         return pci_register_driver(&i40e_driver);
11988 }
11989 module_init(i40e_init_module);
11990
11991 /**
11992  * i40e_exit_module - Driver exit cleanup routine
11993  *
11994  * i40e_exit_module is called just before the driver is removed
11995  * from memory.
11996  **/
11997 static void __exit i40e_exit_module(void)
11998 {
11999         pci_unregister_driver(&i40e_driver);
12000         destroy_workqueue(i40e_wq);
12001         i40e_dbg_exit();
12002 }
12003 module_exit(i40e_exit_module);