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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2014 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 /* Local includes */
  28 #include "i40e.h"
  29 #ifdef CONFIG_I40E_VXLAN
  30 #include <net/vxlan.h>
  31 #endif
  32
  33 const char i40e_driver_name[] = "i40e";
  34 static const char i40e_driver_string[] =
  35                         "Intel(R) Ethernet Connection XL710 Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 0
  40 #define DRV_VERSION_MINOR 3
  41 #define DRV_VERSION_BUILD 34
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  45 const char i40e_driver_version_str[] = DRV_VERSION;
  46 static const char i40e_copyright[] = "Copyright (c) 2013 - 2014 Intel Corporation.";
  47
  48 /* a bit of forward declarations */
  49 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  50 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  51 static int i40e_add_vsi(struct i40e_vsi *vsi);
  52 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  53 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  54 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  55 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  56 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  57 static void i40e_fdir_sb_setup(struct i40e_pf *pf);
  58 static int i40e_veb_get_bw_info(struct i40e_veb *veb);
  59
  60 /* i40e_pci_tbl - PCI Device ID Table
  61  *
  62  * Last entry must be all 0s
  63  *
  64  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  65  *   Class, Class Mask, private data (not used) }
  66  */
  67 static DEFINE_PCI_DEVICE_TABLE(i40e_pci_tbl) = {
  68         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
  69         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X710), 0},
  70         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
  71         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_A), 0},
  72         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
  73         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
  74         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_D), 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         /* required last entry */
  79         {0, }
  80 };
  81 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  82
  83 #define I40E_MAX_VF_COUNT 128
  84 static int debug = -1;
  85 module_param(debug, int, 0);
  86 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  87
  88 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  89 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  90 MODULE_LICENSE("GPL");
  91 MODULE_VERSION(DRV_VERSION);
  92
  93 /**
  94  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
  95  * @hw:   pointer to the HW structure
  96  * @mem:  ptr to mem struct to fill out
  97  * @size: size of memory requested
  98  * @alignment: what to align the allocation to
  99  **/
 100 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
 101                             u64 size, u32 alignment)
 102 {
 103         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 104
 105         mem->size = ALIGN(size, alignment);
 106         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 107                                       &mem->pa, GFP_KERNEL);
 108         if (!mem->va)
 109                 return -ENOMEM;
 110
 111         return 0;
 112 }
 113
 114 /**
 115  * i40e_free_dma_mem_d - OS specific memory free for shared code
 116  * @hw:   pointer to the HW structure
 117  * @mem:  ptr to mem struct to free
 118  **/
 119 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 120 {
 121         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 122
 123         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 124         mem->va = NULL;
 125         mem->pa = 0;
 126         mem->size = 0;
 127
 128         return 0;
 129 }
 130
 131 /**
 132  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 133  * @hw:   pointer to the HW structure
 134  * @mem:  ptr to mem struct to fill out
 135  * @size: size of memory requested
 136  **/
 137 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 138                              u32 size)
 139 {
 140         mem->size = size;
 141         mem->va = kzalloc(size, GFP_KERNEL);
 142
 143         if (!mem->va)
 144                 return -ENOMEM;
 145
 146         return 0;
 147 }
 148
 149 /**
 150  * i40e_free_virt_mem_d - OS specific memory free for shared code
 151  * @hw:   pointer to the HW structure
 152  * @mem:  ptr to mem struct to free
 153  **/
 154 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 155 {
 156         /* it's ok to kfree a NULL pointer */
 157         kfree(mem->va);
 158         mem->va = NULL;
 159         mem->size = 0;
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * i40e_get_lump - find a lump of free generic resource
 166  * @pf: board private structure
 167  * @pile: the pile of resource to search
 168  * @needed: the number of items needed
 169  * @id: an owner id to stick on the items assigned
 170  *
 171  * Returns the base item index of the lump, or negative for error
 172  *
 173  * The search_hint trick and lack of advanced fit-finding only work
 174  * because we're highly likely to have all the same size lump requests.
 175  * Linear search time and any fragmentation should be minimal.
 176  **/
 177 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 178                          u16 needed, u16 id)
 179 {
 180         int ret = -ENOMEM;
 181         int i, j;
 182
 183         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 184                 dev_info(&pf->pdev->dev,
 185                          "param err: pile=%p needed=%d id=0x%04x\n",
 186                          pile, needed, id);
 187                 return -EINVAL;
 188         }
 189
 190         /* start the linear search with an imperfect hint */
 191         i = pile->search_hint;
 192         while (i < pile->num_entries) {
 193                 /* skip already allocated entries */
 194                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 195                         i++;
 196                         continue;
 197                 }
 198
 199                 /* do we have enough in this lump? */
 200                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 201                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 202                                 break;
 203                 }
 204
 205                 if (j == needed) {
 206                         /* there was enough, so assign it to the requestor */
 207                         for (j = 0; j < needed; j++)
 208                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 209                         ret = i;
 210                         pile->search_hint = i + j;
 211                         break;
 212                 } else {
 213                         /* not enough, so skip over it and continue looking */
 214                         i += j;
 215                 }
 216         }
 217
 218         return ret;
 219 }
 220
 221 /**
 222  * i40e_put_lump - return a lump of generic resource
 223  * @pile: the pile of resource to search
 224  * @index: the base item index
 225  * @id: the owner id of the items assigned
 226  *
 227  * Returns the count of items in the lump
 228  **/
 229 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 230 {
 231         int valid_id = (id | I40E_PILE_VALID_BIT);
 232         int count = 0;
 233         int i;
 234
 235         if (!pile || index >= pile->num_entries)
 236                 return -EINVAL;
 237
 238         for (i = index;
 239              i < pile->num_entries && pile->list[i] == valid_id;
 240              i++) {
 241                 pile->list[i] = 0;
 242                 count++;
 243         }
 244
 245         if (count && index < pile->search_hint)
 246                 pile->search_hint = index;
 247
 248         return count;
 249 }
 250
 251 /**
 252  * i40e_service_event_schedule - Schedule the service task to wake up
 253  * @pf: board private structure
 254  *
 255  * If not already scheduled, this puts the task into the work queue
 256  **/
 257 static void i40e_service_event_schedule(struct i40e_pf *pf)
 258 {
 259         if (!test_bit(__I40E_DOWN, &pf->state) &&
 260             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 261             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 262                 schedule_work(&pf->service_task);
 263 }
 264
 265 /**
 266  * i40e_tx_timeout - Respond to a Tx Hang
 267  * @netdev: network interface device structure
 268  *
 269  * If any port has noticed a Tx timeout, it is likely that the whole
 270  * device is munged, not just the one netdev port, so go for the full
 271  * reset.
 272  **/
 273 static void i40e_tx_timeout(struct net_device *netdev)
 274 {
 275         struct i40e_netdev_priv *np = netdev_priv(netdev);
 276         struct i40e_vsi *vsi = np->vsi;
 277         struct i40e_pf *pf = vsi->back;
 278
 279         pf->tx_timeout_count++;
 280
 281         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 282                 pf->tx_timeout_recovery_level = 0;
 283         pf->tx_timeout_last_recovery = jiffies;
 284         netdev_info(netdev, "tx_timeout recovery level %d\n",
 285                     pf->tx_timeout_recovery_level);
 286
 287         switch (pf->tx_timeout_recovery_level) {
 288         case 0:
 289                 /* disable and re-enable queues for the VSI */
 290                 if (in_interrupt()) {
 291                         set_bit(__I40E_REINIT_REQUESTED, &pf->state);
 292                         set_bit(__I40E_REINIT_REQUESTED, &vsi->state);
 293                 } else {
 294                         i40e_vsi_reinit_locked(vsi);
 295                 }
 296                 break;
 297         case 1:
 298                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 299                 break;
 300         case 2:
 301                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 302                 break;
 303         case 3:
 304                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 305                 break;
 306         default:
 307                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 308                 set_bit(__I40E_DOWN, &vsi->state);
 309                 i40e_down(vsi);
 310                 break;
 311         }
 312         i40e_service_event_schedule(pf);
 313         pf->tx_timeout_recovery_level++;
 314 }
 315
 316 /**
 317  * i40e_release_rx_desc - Store the new tail and head values
 318  * @rx_ring: ring to bump
 319  * @val: new head index
 320  **/
 321 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 322 {
 323         rx_ring->next_to_use = val;
 324
 325         /* Force memory writes to complete before letting h/w
 326          * know there are new descriptors to fetch.  (Only
 327          * applicable for weak-ordered memory model archs,
 328          * such as IA-64).
 329          */
 330         wmb();
 331         writel(val, rx_ring->tail);
 332 }
 333
 334 /**
 335  * i40e_get_vsi_stats_struct - Get System Network Statistics
 336  * @vsi: the VSI we care about
 337  *
 338  * Returns the address of the device statistics structure.
 339  * The statistics are actually updated from the service task.
 340  **/
 341 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 342 {
 343         return &vsi->net_stats;
 344 }
 345
 346 /**
 347  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 348  * @netdev: network interface device structure
 349  *
 350  * Returns the address of the device statistics structure.
 351  * The statistics are actually updated from the service task.
 352  **/
 353 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 354                                              struct net_device *netdev,
 355                                              struct rtnl_link_stats64 *stats)
 356 {
 357         struct i40e_netdev_priv *np = netdev_priv(netdev);
 358         struct i40e_vsi *vsi = np->vsi;
 359         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 360         int i;
 361
 362         if (test_bit(__I40E_DOWN, &vsi->state))
 363                 return stats;
 364
 365         if (!vsi->tx_rings)
 366                 return stats;
 367
 368         rcu_read_lock();
 369         for (i = 0; i < vsi->num_queue_pairs; i++) {
 370                 struct i40e_ring *tx_ring, *rx_ring;
 371                 u64 bytes, packets;
 372                 unsigned int start;
 373
 374                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 375                 if (!tx_ring)
 376                         continue;
 377
 378                 do {
 379                         start = u64_stats_fetch_begin_bh(&tx_ring->syncp);
 380                         packets = tx_ring->stats.packets;
 381                         bytes   = tx_ring->stats.bytes;
 382                 } while (u64_stats_fetch_retry_bh(&tx_ring->syncp, start));
 383
 384                 stats->tx_packets += packets;
 385                 stats->tx_bytes   += bytes;
 386                 rx_ring = &tx_ring[1];
 387
 388                 do {
 389                         start = u64_stats_fetch_begin_bh(&rx_ring->syncp);
 390                         packets = rx_ring->stats.packets;
 391                         bytes   = rx_ring->stats.bytes;
 392                 } while (u64_stats_fetch_retry_bh(&rx_ring->syncp, start));
 393
 394                 stats->rx_packets += packets;
 395                 stats->rx_bytes   += bytes;
 396         }
 397         rcu_read_unlock();
 398
 399         /* following stats updated by ixgbe_watchdog_task() */
 400         stats->multicast        = vsi_stats->multicast;
 401         stats->tx_errors        = vsi_stats->tx_errors;
 402         stats->tx_dropped       = vsi_stats->tx_dropped;
 403         stats->rx_errors        = vsi_stats->rx_errors;
 404         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 405         stats->rx_length_errors = vsi_stats->rx_length_errors;
 406
 407         return stats;
 408 }
 409
 410 /**
 411  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 412  * @vsi: the VSI to have its stats reset
 413  **/
 414 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 415 {
 416         struct rtnl_link_stats64 *ns;
 417         int i;
 418
 419         if (!vsi)
 420                 return;
 421
 422         ns = i40e_get_vsi_stats_struct(vsi);
 423         memset(ns, 0, sizeof(*ns));
 424         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 425         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 426         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 427         if (vsi->rx_rings && vsi->rx_rings[0]) {
 428                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 429                         memset(&vsi->rx_rings[i]->stats, 0 ,
 430                                sizeof(vsi->rx_rings[i]->stats));
 431                         memset(&vsi->rx_rings[i]->rx_stats, 0 ,
 432                                sizeof(vsi->rx_rings[i]->rx_stats));
 433                         memset(&vsi->tx_rings[i]->stats, 0 ,
 434                                sizeof(vsi->tx_rings[i]->stats));
 435                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 436                                sizeof(vsi->tx_rings[i]->tx_stats));
 437                 }
 438         }
 439         vsi->stat_offsets_loaded = false;
 440 }
 441
 442 /**
 443  * i40e_pf_reset_stats - Reset all of the stats for the given pf
 444  * @pf: the PF to be reset
 445  **/
 446 void i40e_pf_reset_stats(struct i40e_pf *pf)
 447 {
 448         memset(&pf->stats, 0, sizeof(pf->stats));
 449         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 450         pf->stat_offsets_loaded = false;
 451 }
 452
 453 /**
 454  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 455  * @hw: ptr to the hardware info
 456  * @hireg: the high 32 bit reg to read
 457  * @loreg: the low 32 bit reg to read
 458  * @offset_loaded: has the initial offset been loaded yet
 459  * @offset: ptr to current offset value
 460  * @stat: ptr to the stat
 461  *
 462  * Since the device stats are not reset at PFReset, they likely will not
 463  * be zeroed when the driver starts.  We'll save the first values read
 464  * and use them as offsets to be subtracted from the raw values in order
 465  * to report stats that count from zero.  In the process, we also manage
 466  * the potential roll-over.
 467  **/
 468 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 469                                bool offset_loaded, u64 *offset, u64 *stat)
 470 {
 471         u64 new_data;
 472
 473         if (hw->device_id == I40E_DEV_ID_QEMU) {
 474                 new_data = rd32(hw, loreg);
 475                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 476         } else {
 477                 new_data = rd64(hw, loreg);
 478         }
 479         if (!offset_loaded)
 480                 *offset = new_data;
 481         if (likely(new_data >= *offset))
 482                 *stat = new_data - *offset;
 483         else
 484                 *stat = (new_data + ((u64)1 << 48)) - *offset;
 485         *stat &= 0xFFFFFFFFFFFFULL;
 486 }
 487
 488 /**
 489  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 490  * @hw: ptr to the hardware info
 491  * @reg: the hw reg to read
 492  * @offset_loaded: has the initial offset been loaded yet
 493  * @offset: ptr to current offset value
 494  * @stat: ptr to the stat
 495  **/
 496 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 497                                bool offset_loaded, u64 *offset, u64 *stat)
 498 {
 499         u32 new_data;
 500
 501         new_data = rd32(hw, reg);
 502         if (!offset_loaded)
 503                 *offset = new_data;
 504         if (likely(new_data >= *offset))
 505                 *stat = (u32)(new_data - *offset);
 506         else
 507                 *stat = (u32)((new_data + ((u64)1 << 32)) - *offset);
 508 }
 509
 510 /**
 511  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 512  * @vsi: the VSI to be updated
 513  **/
 514 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 515 {
 516         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 517         struct i40e_pf *pf = vsi->back;
 518         struct i40e_hw *hw = &pf->hw;
 519         struct i40e_eth_stats *oes;
 520         struct i40e_eth_stats *es;     /* device's eth stats */
 521
 522         es = &vsi->eth_stats;
 523         oes = &vsi->eth_stats_offsets;
 524
 525         /* Gather up the stats that the hw collects */
 526         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 527                            vsi->stat_offsets_loaded,
 528                            &oes->tx_errors, &es->tx_errors);
 529         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 530                            vsi->stat_offsets_loaded,
 531                            &oes->rx_discards, &es->rx_discards);
 532
 533         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 534                            I40E_GLV_GORCL(stat_idx),
 535                            vsi->stat_offsets_loaded,
 536                            &oes->rx_bytes, &es->rx_bytes);
 537         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 538                            I40E_GLV_UPRCL(stat_idx),
 539                            vsi->stat_offsets_loaded,
 540                            &oes->rx_unicast, &es->rx_unicast);
 541         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 542                            I40E_GLV_MPRCL(stat_idx),
 543                            vsi->stat_offsets_loaded,
 544                            &oes->rx_multicast, &es->rx_multicast);
 545         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 546                            I40E_GLV_BPRCL(stat_idx),
 547                            vsi->stat_offsets_loaded,
 548                            &oes->rx_broadcast, &es->rx_broadcast);
 549
 550         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 551                            I40E_GLV_GOTCL(stat_idx),
 552                            vsi->stat_offsets_loaded,
 553                            &oes->tx_bytes, &es->tx_bytes);
 554         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 555                            I40E_GLV_UPTCL(stat_idx),
 556                            vsi->stat_offsets_loaded,
 557                            &oes->tx_unicast, &es->tx_unicast);
 558         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 559                            I40E_GLV_MPTCL(stat_idx),
 560                            vsi->stat_offsets_loaded,
 561                            &oes->tx_multicast, &es->tx_multicast);
 562         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 563                            I40E_GLV_BPTCL(stat_idx),
 564                            vsi->stat_offsets_loaded,
 565                            &oes->tx_broadcast, &es->tx_broadcast);
 566         vsi->stat_offsets_loaded = true;
 567 }
 568
 569 /**
 570  * i40e_update_veb_stats - Update Switch component statistics
 571  * @veb: the VEB being updated
 572  **/
 573 static void i40e_update_veb_stats(struct i40e_veb *veb)
 574 {
 575         struct i40e_pf *pf = veb->pf;
 576         struct i40e_hw *hw = &pf->hw;
 577         struct i40e_eth_stats *oes;
 578         struct i40e_eth_stats *es;     /* device's eth stats */
 579         int idx = 0;
 580
 581         idx = veb->stats_idx;
 582         es = &veb->stats;
 583         oes = &veb->stats_offsets;
 584
 585         /* Gather up the stats that the hw collects */
 586         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 587                            veb->stat_offsets_loaded,
 588                            &oes->tx_discards, &es->tx_discards);
 589         if (hw->revision_id > 0)
 590                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 591                                    veb->stat_offsets_loaded,
 592                                    &oes->rx_unknown_protocol,
 593                                    &es->rx_unknown_protocol);
 594         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 595                            veb->stat_offsets_loaded,
 596                            &oes->rx_bytes, &es->rx_bytes);
 597         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 598                            veb->stat_offsets_loaded,
 599                            &oes->rx_unicast, &es->rx_unicast);
 600         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 601                            veb->stat_offsets_loaded,
 602                            &oes->rx_multicast, &es->rx_multicast);
 603         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 604                            veb->stat_offsets_loaded,
 605                            &oes->rx_broadcast, &es->rx_broadcast);
 606
 607         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 608                            veb->stat_offsets_loaded,
 609                            &oes->tx_bytes, &es->tx_bytes);
 610         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 611                            veb->stat_offsets_loaded,
 612                            &oes->tx_unicast, &es->tx_unicast);
 613         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 614                            veb->stat_offsets_loaded,
 615                            &oes->tx_multicast, &es->tx_multicast);
 616         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 617                            veb->stat_offsets_loaded,
 618                            &oes->tx_broadcast, &es->tx_broadcast);
 619         veb->stat_offsets_loaded = true;
 620 }
 621
 622 /**
 623  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 624  * @pf: the corresponding PF
 625  *
 626  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 627  **/
 628 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 629 {
 630         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 631         struct i40e_hw_port_stats *nsd = &pf->stats;
 632         struct i40e_hw *hw = &pf->hw;
 633         u64 xoff = 0;
 634         u16 i, v;
 635
 636         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 637             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 638                 return;
 639
 640         xoff = nsd->link_xoff_rx;
 641         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 642                            pf->stat_offsets_loaded,
 643                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 644
 645         /* No new LFC xoff rx */
 646         if (!(nsd->link_xoff_rx - xoff))
 647                 return;
 648
 649         /* Clear the __I40E_HANG_CHECK_ARMED bit for all Tx rings */
 650         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 651                 struct i40e_vsi *vsi = pf->vsi[v];
 652
 653                 if (!vsi)
 654                         continue;
 655
 656                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 657                         struct i40e_ring *ring = vsi->tx_rings[i];
 658                         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
 659                 }
 660         }
 661 }
 662
 663 /**
 664  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 665  * @pf: the corresponding PF
 666  *
 667  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 668  **/
 669 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 670 {
 671         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 672         struct i40e_hw_port_stats *nsd = &pf->stats;
 673         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 674         struct i40e_dcbx_config *dcb_cfg;
 675         struct i40e_hw *hw = &pf->hw;
 676         u16 i, v;
 677         u8 tc;
 678
 679         dcb_cfg = &hw->local_dcbx_config;
 680
 681         /* See if DCB enabled with PFC TC */
 682         if (!(pf->flags & I40E_FLAG_DCB_ENABLED) ||
 683             !(dcb_cfg->pfc.pfcenable)) {
 684                 i40e_update_link_xoff_rx(pf);
 685                 return;
 686         }
 687
 688         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 689                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 690                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 691                                    pf->stat_offsets_loaded,
 692                                    &osd->priority_xoff_rx[i],
 693                                    &nsd->priority_xoff_rx[i]);
 694
 695                 /* No new PFC xoff rx */
 696                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 697                         continue;
 698                 /* Get the TC for given priority */
 699                 tc = dcb_cfg->etscfg.prioritytable[i];
 700                 xoff[tc] = true;
 701         }
 702
 703         /* Clear the __I40E_HANG_CHECK_ARMED bit for Tx rings */
 704         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 705                 struct i40e_vsi *vsi = pf->vsi[v];
 706
 707                 if (!vsi)
 708                         continue;
 709
 710                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 711                         struct i40e_ring *ring = vsi->tx_rings[i];
 712
 713                         tc = ring->dcb_tc;
 714                         if (xoff[tc])
 715                                 clear_bit(__I40E_HANG_CHECK_ARMED,
 716                                           &ring->state);
 717                 }
 718         }
 719 }
 720
 721 /**
 722  * i40e_update_stats - Update the board statistics counters.
 723  * @vsi: the VSI to be updated
 724  *
 725  * There are a few instances where we store the same stat in a
 726  * couple of different structs.  This is partly because we have
 727  * the netdev stats that need to be filled out, which is slightly
 728  * different from the "eth_stats" defined by the chip and used in
 729  * VF communications.  We sort it all out here in a central place.
 730  **/
 731 void i40e_update_stats(struct i40e_vsi *vsi)
 732 {
 733         struct i40e_pf *pf = vsi->back;
 734         struct i40e_hw *hw = &pf->hw;
 735         struct rtnl_link_stats64 *ons;
 736         struct rtnl_link_stats64 *ns;   /* netdev stats */
 737         struct i40e_eth_stats *oes;
 738         struct i40e_eth_stats *es;     /* device's eth stats */
 739         u32 tx_restart, tx_busy;
 740         u32 rx_page, rx_buf;
 741         u64 rx_p, rx_b;
 742         u64 tx_p, tx_b;
 743         int i;
 744         u16 q;
 745
 746         if (test_bit(__I40E_DOWN, &vsi->state) ||
 747             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 748                 return;
 749
 750         ns = i40e_get_vsi_stats_struct(vsi);
 751         ons = &vsi->net_stats_offsets;
 752         es = &vsi->eth_stats;
 753         oes = &vsi->eth_stats_offsets;
 754
 755         /* Gather up the netdev and vsi stats that the driver collects
 756          * on the fly during packet processing
 757          */
 758         rx_b = rx_p = 0;
 759         tx_b = tx_p = 0;
 760         tx_restart = tx_busy = 0;
 761         rx_page = 0;
 762         rx_buf = 0;
 763         rcu_read_lock();
 764         for (q = 0; q < vsi->num_queue_pairs; q++) {
 765                 struct i40e_ring *p;
 766                 u64 bytes, packets;
 767                 unsigned int start;
 768
 769                 /* locate Tx ring */
 770                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 771
 772                 do {
 773                         start = u64_stats_fetch_begin_bh(&p->syncp);
 774                         packets = p->stats.packets;
 775                         bytes = p->stats.bytes;
 776                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 777                 tx_b += bytes;
 778                 tx_p += packets;
 779                 tx_restart += p->tx_stats.restart_queue;
 780                 tx_busy += p->tx_stats.tx_busy;
 781
 782                 /* Rx queue is part of the same block as Tx queue */
 783                 p = &p[1];
 784                 do {
 785                         start = u64_stats_fetch_begin_bh(&p->syncp);
 786                         packets = p->stats.packets;
 787                         bytes = p->stats.bytes;
 788                 } while (u64_stats_fetch_retry_bh(&p->syncp, start));
 789                 rx_b += bytes;
 790                 rx_p += packets;
 791                 rx_buf += p->rx_stats.alloc_buff_failed;
 792                 rx_page += p->rx_stats.alloc_page_failed;
 793         }
 794         rcu_read_unlock();
 795         vsi->tx_restart = tx_restart;
 796         vsi->tx_busy = tx_busy;
 797         vsi->rx_page_failed = rx_page;
 798         vsi->rx_buf_failed = rx_buf;
 799
 800         ns->rx_packets = rx_p;
 801         ns->rx_bytes = rx_b;
 802         ns->tx_packets = tx_p;
 803         ns->tx_bytes = tx_b;
 804
 805         i40e_update_eth_stats(vsi);
 806         /* update netdev stats from eth stats */
 807         ons->rx_errors = oes->rx_errors;
 808         ns->rx_errors = es->rx_errors;
 809         ons->tx_errors = oes->tx_errors;
 810         ns->tx_errors = es->tx_errors;
 811         ons->multicast = oes->rx_multicast;
 812         ns->multicast = es->rx_multicast;
 813         ons->tx_dropped = oes->tx_discards;
 814         ns->tx_dropped = es->tx_discards;
 815
 816         /* Get the port data only if this is the main PF VSI */
 817         if (vsi == pf->vsi[pf->lan_vsi]) {
 818                 struct i40e_hw_port_stats *nsd = &pf->stats;
 819                 struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 820
 821                 i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 822                                    I40E_GLPRT_GORCL(hw->port),
 823                                    pf->stat_offsets_loaded,
 824                                    &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 825                 i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 826                                    I40E_GLPRT_GOTCL(hw->port),
 827                                    pf->stat_offsets_loaded,
 828                                    &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 829                 i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 830                                    pf->stat_offsets_loaded,
 831                                    &osd->eth.rx_discards,
 832                                    &nsd->eth.rx_discards);
 833                 i40e_stat_update32(hw, I40E_GLPRT_TDPC(hw->port),
 834                                    pf->stat_offsets_loaded,
 835                                    &osd->eth.tx_discards,
 836                                    &nsd->eth.tx_discards);
 837                 i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 838                                    I40E_GLPRT_MPRCL(hw->port),
 839                                    pf->stat_offsets_loaded,
 840                                    &osd->eth.rx_multicast,
 841                                    &nsd->eth.rx_multicast);
 842
 843                 i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 844                                    pf->stat_offsets_loaded,
 845                                    &osd->tx_dropped_link_down,
 846                                    &nsd->tx_dropped_link_down);
 847
 848                 i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 849                                    pf->stat_offsets_loaded,
 850                                    &osd->crc_errors, &nsd->crc_errors);
 851                 ns->rx_crc_errors = nsd->crc_errors;
 852
 853                 i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 854                                    pf->stat_offsets_loaded,
 855                                    &osd->illegal_bytes, &nsd->illegal_bytes);
 856                 ns->rx_errors = nsd->crc_errors
 857                                 + nsd->illegal_bytes;
 858
 859                 i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 860                                    pf->stat_offsets_loaded,
 861                                    &osd->mac_local_faults,
 862                                    &nsd->mac_local_faults);
 863                 i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 864                                    pf->stat_offsets_loaded,
 865                                    &osd->mac_remote_faults,
 866                                    &nsd->mac_remote_faults);
 867
 868                 i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 869                                    pf->stat_offsets_loaded,
 870                                    &osd->rx_length_errors,
 871                                    &nsd->rx_length_errors);
 872                 ns->rx_length_errors = nsd->rx_length_errors;
 873
 874                 i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 875                                    pf->stat_offsets_loaded,
 876                                    &osd->link_xon_rx, &nsd->link_xon_rx);
 877                 i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 878                                    pf->stat_offsets_loaded,
 879                                    &osd->link_xon_tx, &nsd->link_xon_tx);
 880                 i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
 881                 i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 882                                    pf->stat_offsets_loaded,
 883                                    &osd->link_xoff_tx, &nsd->link_xoff_tx);
 884
 885                 for (i = 0; i < 8; i++) {
 886                         i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 887                                            pf->stat_offsets_loaded,
 888                                            &osd->priority_xon_rx[i],
 889                                            &nsd->priority_xon_rx[i]);
 890                         i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 891                                            pf->stat_offsets_loaded,
 892                                            &osd->priority_xon_tx[i],
 893                                            &nsd->priority_xon_tx[i]);
 894                         i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 895                                            pf->stat_offsets_loaded,
 896                                            &osd->priority_xoff_tx[i],
 897                                            &nsd->priority_xoff_tx[i]);
 898                         i40e_stat_update32(hw,
 899                                            I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 900                                            pf->stat_offsets_loaded,
 901                                            &osd->priority_xon_2_xoff[i],
 902                                            &nsd->priority_xon_2_xoff[i]);
 903                 }
 904
 905                 i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
 906                                    I40E_GLPRT_PRC64L(hw->port),
 907                                    pf->stat_offsets_loaded,
 908                                    &osd->rx_size_64, &nsd->rx_size_64);
 909                 i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
 910                                    I40E_GLPRT_PRC127L(hw->port),
 911                                    pf->stat_offsets_loaded,
 912                                    &osd->rx_size_127, &nsd->rx_size_127);
 913                 i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
 914                                    I40E_GLPRT_PRC255L(hw->port),
 915                                    pf->stat_offsets_loaded,
 916                                    &osd->rx_size_255, &nsd->rx_size_255);
 917                 i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
 918                                    I40E_GLPRT_PRC511L(hw->port),
 919                                    pf->stat_offsets_loaded,
 920                                    &osd->rx_size_511, &nsd->rx_size_511);
 921                 i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
 922                                    I40E_GLPRT_PRC1023L(hw->port),
 923                                    pf->stat_offsets_loaded,
 924                                    &osd->rx_size_1023, &nsd->rx_size_1023);
 925                 i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
 926                                    I40E_GLPRT_PRC1522L(hw->port),
 927                                    pf->stat_offsets_loaded,
 928                                    &osd->rx_size_1522, &nsd->rx_size_1522);
 929                 i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
 930                                    I40E_GLPRT_PRC9522L(hw->port),
 931                                    pf->stat_offsets_loaded,
 932                                    &osd->rx_size_big, &nsd->rx_size_big);
 933
 934                 i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
 935                                    I40E_GLPRT_PTC64L(hw->port),
 936                                    pf->stat_offsets_loaded,
 937                                    &osd->tx_size_64, &nsd->tx_size_64);
 938                 i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
 939                                    I40E_GLPRT_PTC127L(hw->port),
 940                                    pf->stat_offsets_loaded,
 941                                    &osd->tx_size_127, &nsd->tx_size_127);
 942                 i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
 943                                    I40E_GLPRT_PTC255L(hw->port),
 944                                    pf->stat_offsets_loaded,
 945                                    &osd->tx_size_255, &nsd->tx_size_255);
 946                 i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
 947                                    I40E_GLPRT_PTC511L(hw->port),
 948                                    pf->stat_offsets_loaded,
 949                                    &osd->tx_size_511, &nsd->tx_size_511);
 950                 i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
 951                                    I40E_GLPRT_PTC1023L(hw->port),
 952                                    pf->stat_offsets_loaded,
 953                                    &osd->tx_size_1023, &nsd->tx_size_1023);
 954                 i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
 955                                    I40E_GLPRT_PTC1522L(hw->port),
 956                                    pf->stat_offsets_loaded,
 957                                    &osd->tx_size_1522, &nsd->tx_size_1522);
 958                 i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
 959                                    I40E_GLPRT_PTC9522L(hw->port),
 960                                    pf->stat_offsets_loaded,
 961                                    &osd->tx_size_big, &nsd->tx_size_big);
 962
 963                 i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
 964                                    pf->stat_offsets_loaded,
 965                                    &osd->rx_undersize, &nsd->rx_undersize);
 966                 i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
 967                                    pf->stat_offsets_loaded,
 968                                    &osd->rx_fragments, &nsd->rx_fragments);
 969                 i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
 970                                    pf->stat_offsets_loaded,
 971                                    &osd->rx_oversize, &nsd->rx_oversize);
 972                 i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
 973                                    pf->stat_offsets_loaded,
 974                                    &osd->rx_jabber, &nsd->rx_jabber);
 975         }
 976
 977         pf->stat_offsets_loaded = true;
 978 }
 979
 980 /**
 981  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 982  * @vsi: the VSI to be searched
 983  * @macaddr: the MAC address
 984  * @vlan: the vlan
 985  * @is_vf: make sure its a vf filter, else doesn't matter
 986  * @is_netdev: make sure its a netdev filter, else doesn't matter
 987  *
 988  * Returns ptr to the filter object or NULL
 989  **/
 990 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
 991                                                 u8 *macaddr, s16 vlan,
 992                                                 bool is_vf, bool is_netdev)
 993 {
 994         struct i40e_mac_filter *f;
 995
 996         if (!vsi || !macaddr)
 997                 return NULL;
 998
 999         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1000                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1001                     (vlan == f->vlan)    &&
1002                     (!is_vf || f->is_vf) &&
1003                     (!is_netdev || f->is_netdev))
1004                         return f;
1005         }
1006         return NULL;
1007 }
1008
1009 /**
1010  * i40e_find_mac - Find a mac addr in the macvlan filters list
1011  * @vsi: the VSI to be searched
1012  * @macaddr: the MAC address we are searching for
1013  * @is_vf: make sure its a vf filter, else doesn't matter
1014  * @is_netdev: make sure its a netdev filter, else doesn't matter
1015  *
1016  * Returns the first filter with the provided MAC address or NULL if
1017  * MAC address was not found
1018  **/
1019 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1020                                       bool is_vf, bool is_netdev)
1021 {
1022         struct i40e_mac_filter *f;
1023
1024         if (!vsi || !macaddr)
1025                 return NULL;
1026
1027         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1028                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1029                     (!is_vf || f->is_vf) &&
1030                     (!is_netdev || f->is_netdev))
1031                         return f;
1032         }
1033         return NULL;
1034 }
1035
1036 /**
1037  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1038  * @vsi: the VSI to be searched
1039  *
1040  * Returns true if VSI is in vlan mode or false otherwise
1041  **/
1042 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1043 {
1044         struct i40e_mac_filter *f;
1045
1046         /* Only -1 for all the filters denotes not in vlan mode
1047          * so we have to go through all the list in order to make sure
1048          */
1049         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1050                 if (f->vlan >= 0)
1051                         return true;
1052         }
1053
1054         return false;
1055 }
1056
1057 /**
1058  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1059  * @vsi: the VSI to be searched
1060  * @macaddr: the mac address to be filtered
1061  * @is_vf: true if it is a vf
1062  * @is_netdev: true if it is a netdev
1063  *
1064  * Goes through all the macvlan filters and adds a
1065  * macvlan filter for each unique vlan that already exists
1066  *
1067  * Returns first filter found on success, else NULL
1068  **/
1069 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1070                                              bool is_vf, bool is_netdev)
1071 {
1072         struct i40e_mac_filter *f;
1073
1074         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1075                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1076                                       is_vf, is_netdev)) {
1077                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1078                                              is_vf, is_netdev))
1079                                 return NULL;
1080                 }
1081         }
1082
1083         return list_first_entry_or_null(&vsi->mac_filter_list,
1084                                         struct i40e_mac_filter, list);
1085 }
1086
1087 /**
1088  * i40e_add_filter - Add a mac/vlan filter to the VSI
1089  * @vsi: the VSI to be searched
1090  * @macaddr: the MAC address
1091  * @vlan: the vlan
1092  * @is_vf: make sure its a vf filter, else doesn't matter
1093  * @is_netdev: make sure its a netdev filter, else doesn't matter
1094  *
1095  * Returns ptr to the filter object or NULL when no memory available.
1096  **/
1097 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1098                                         u8 *macaddr, s16 vlan,
1099                                         bool is_vf, bool is_netdev)
1100 {
1101         struct i40e_mac_filter *f;
1102
1103         if (!vsi || !macaddr)
1104                 return NULL;
1105
1106         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1107         if (!f) {
1108                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1109                 if (!f)
1110                         goto add_filter_out;
1111
1112                 memcpy(f->macaddr, macaddr, ETH_ALEN);
1113                 f->vlan = vlan;
1114                 f->changed = true;
1115
1116                 INIT_LIST_HEAD(&f->list);
1117                 list_add(&f->list, &vsi->mac_filter_list);
1118         }
1119
1120         /* increment counter and add a new flag if needed */
1121         if (is_vf) {
1122                 if (!f->is_vf) {
1123                         f->is_vf = true;
1124                         f->counter++;
1125                 }
1126         } else if (is_netdev) {
1127                 if (!f->is_netdev) {
1128                         f->is_netdev = true;
1129                         f->counter++;
1130                 }
1131         } else {
1132                 f->counter++;
1133         }
1134
1135         /* changed tells sync_filters_subtask to
1136          * push the filter down to the firmware
1137          */
1138         if (f->changed) {
1139                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1140                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1141         }
1142
1143 add_filter_out:
1144         return f;
1145 }
1146
1147 /**
1148  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1149  * @vsi: the VSI to be searched
1150  * @macaddr: the MAC address
1151  * @vlan: the vlan
1152  * @is_vf: make sure it's a vf filter, else doesn't matter
1153  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1154  **/
1155 void i40e_del_filter(struct i40e_vsi *vsi,
1156                      u8 *macaddr, s16 vlan,
1157                      bool is_vf, bool is_netdev)
1158 {
1159         struct i40e_mac_filter *f;
1160
1161         if (!vsi || !macaddr)
1162                 return;
1163
1164         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1165         if (!f || f->counter == 0)
1166                 return;
1167
1168         if (is_vf) {
1169                 if (f->is_vf) {
1170                         f->is_vf = false;
1171                         f->counter--;
1172                 }
1173         } else if (is_netdev) {
1174                 if (f->is_netdev) {
1175                         f->is_netdev = false;
1176                         f->counter--;
1177                 }
1178         } else {
1179                 /* make sure we don't remove a filter in use by vf or netdev */
1180                 int min_f = 0;
1181                 min_f += (f->is_vf ? 1 : 0);
1182                 min_f += (f->is_netdev ? 1 : 0);
1183
1184                 if (f->counter > min_f)
1185                         f->counter--;
1186         }
1187
1188         /* counter == 0 tells sync_filters_subtask to
1189          * remove the filter from the firmware's list
1190          */
1191         if (f->counter == 0) {
1192                 f->changed = true;
1193                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1194                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1195         }
1196 }
1197
1198 /**
1199  * i40e_set_mac - NDO callback to set mac address
1200  * @netdev: network interface device structure
1201  * @p: pointer to an address structure
1202  *
1203  * Returns 0 on success, negative on failure
1204  **/
1205 static int i40e_set_mac(struct net_device *netdev, void *p)
1206 {
1207         struct i40e_netdev_priv *np = netdev_priv(netdev);
1208         struct i40e_vsi *vsi = np->vsi;
1209         struct sockaddr *addr = p;
1210         struct i40e_mac_filter *f;
1211
1212         if (!is_valid_ether_addr(addr->sa_data))
1213                 return -EADDRNOTAVAIL;
1214
1215         netdev_info(netdev, "set mac address=%pM\n", addr->sa_data);
1216
1217         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
1218                 return 0;
1219
1220         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1221             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1222                 return -EADDRNOTAVAIL;
1223
1224         if (vsi->type == I40E_VSI_MAIN) {
1225                 i40e_status ret;
1226                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1227                                                 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1228                                                 addr->sa_data, NULL);
1229                 if (ret) {
1230                         netdev_info(netdev,
1231                                     "Addr change for Main VSI failed: %d\n",
1232                                     ret);
1233                         return -EADDRNOTAVAIL;
1234                 }
1235
1236                 memcpy(vsi->back->hw.mac.addr, addr->sa_data, netdev->addr_len);
1237         }
1238
1239         /* In order to be sure to not drop any packets, add the new address
1240          * then delete the old one.
1241          */
1242         f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY, false, false);
1243         if (!f)
1244                 return -ENOMEM;
1245
1246         i40e_sync_vsi_filters(vsi);
1247         i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY, false, false);
1248         i40e_sync_vsi_filters(vsi);
1249
1250         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1251
1252         return 0;
1253 }
1254
1255 /**
1256  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1257  * @vsi: the VSI being setup
1258  * @ctxt: VSI context structure
1259  * @enabled_tc: Enabled TCs bitmap
1260  * @is_add: True if called before Add VSI
1261  *
1262  * Setup VSI queue mapping for enabled traffic classes.
1263  **/
1264 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1265                                      struct i40e_vsi_context *ctxt,
1266                                      u8 enabled_tc,
1267                                      bool is_add)
1268 {
1269         struct i40e_pf *pf = vsi->back;
1270         u16 sections = 0;
1271         u8 netdev_tc = 0;
1272         u16 numtc = 0;
1273         u16 qcount;
1274         u8 offset;
1275         u16 qmap;
1276         int i;
1277         u16 num_tc_qps = 0;
1278
1279         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1280         offset = 0;
1281
1282         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1283                 /* Find numtc from enabled TC bitmap */
1284                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1285                         if (enabled_tc & (1 << i)) /* TC is enabled */
1286                                 numtc++;
1287                 }
1288                 if (!numtc) {
1289                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1290                         numtc = 1;
1291                 }
1292         } else {
1293                 /* At least TC0 is enabled in case of non-DCB case */
1294                 numtc = 1;
1295         }
1296
1297         vsi->tc_config.numtc = numtc;
1298         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1299         /* Number of queues per enabled TC */
1300         num_tc_qps = rounddown_pow_of_two(vsi->alloc_queue_pairs/numtc);
1301         num_tc_qps = min_t(int, num_tc_qps, I40E_MAX_QUEUES_PER_TC);
1302
1303         /* Setup queue offset/count for all TCs for given VSI */
1304         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1305                 /* See if the given TC is enabled for the given VSI */
1306                 if (vsi->tc_config.enabled_tc & (1 << i)) { /* TC is enabled */
1307                         int pow, num_qps;
1308
1309                         switch (vsi->type) {
1310                         case I40E_VSI_MAIN:
1311                                 qcount = min_t(int, pf->rss_size, num_tc_qps);
1312                                 break;
1313                         case I40E_VSI_FDIR:
1314                         case I40E_VSI_SRIOV:
1315                         case I40E_VSI_VMDQ2:
1316                         default:
1317                                 qcount = num_tc_qps;
1318                                 WARN_ON(i != 0);
1319                                 break;
1320                         }
1321                         vsi->tc_config.tc_info[i].qoffset = offset;
1322                         vsi->tc_config.tc_info[i].qcount = qcount;
1323
1324                         /* find the power-of-2 of the number of queue pairs */
1325                         num_qps = qcount;
1326                         pow = 0;
1327                         while (num_qps && ((1 << pow) < qcount)) {
1328                                 pow++;
1329                                 num_qps >>= 1;
1330                         }
1331
1332                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1333                         qmap =
1334                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1335                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1336
1337                         offset += qcount;
1338                 } else {
1339                         /* TC is not enabled so set the offset to
1340                          * default queue and allocate one queue
1341                          * for the given TC.
1342                          */
1343                         vsi->tc_config.tc_info[i].qoffset = 0;
1344                         vsi->tc_config.tc_info[i].qcount = 1;
1345                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1346
1347                         qmap = 0;
1348                 }
1349                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1350         }
1351
1352         /* Set actual Tx/Rx queue pairs */
1353         vsi->num_queue_pairs = offset;
1354
1355         /* Scheduler section valid can only be set for ADD VSI */
1356         if (is_add) {
1357                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1358
1359                 ctxt->info.up_enable_bits = enabled_tc;
1360         }
1361         if (vsi->type == I40E_VSI_SRIOV) {
1362                 ctxt->info.mapping_flags |=
1363                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1364                 for (i = 0; i < vsi->num_queue_pairs; i++)
1365                         ctxt->info.queue_mapping[i] =
1366                                                cpu_to_le16(vsi->base_queue + i);
1367         } else {
1368                 ctxt->info.mapping_flags |=
1369                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1370                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1371         }
1372         ctxt->info.valid_sections |= cpu_to_le16(sections);
1373 }
1374
1375 /**
1376  * i40e_set_rx_mode - NDO callback to set the netdev filters
1377  * @netdev: network interface device structure
1378  **/
1379 static void i40e_set_rx_mode(struct net_device *netdev)
1380 {
1381         struct i40e_netdev_priv *np = netdev_priv(netdev);
1382         struct i40e_mac_filter *f, *ftmp;
1383         struct i40e_vsi *vsi = np->vsi;
1384         struct netdev_hw_addr *uca;
1385         struct netdev_hw_addr *mca;
1386         struct netdev_hw_addr *ha;
1387
1388         /* add addr if not already in the filter list */
1389         netdev_for_each_uc_addr(uca, netdev) {
1390                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1391                         if (i40e_is_vsi_in_vlan(vsi))
1392                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1393                                                      false, true);
1394                         else
1395                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1396                                                 false, true);
1397                 }
1398         }
1399
1400         netdev_for_each_mc_addr(mca, netdev) {
1401                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1402                         if (i40e_is_vsi_in_vlan(vsi))
1403                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1404                                                      false, true);
1405                         else
1406                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1407                                                 false, true);
1408                 }
1409         }
1410
1411         /* remove filter if not in netdev list */
1412         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1413                 bool found = false;
1414
1415                 if (!f->is_netdev)
1416                         continue;
1417
1418                 if (is_multicast_ether_addr(f->macaddr)) {
1419                         netdev_for_each_mc_addr(mca, netdev) {
1420                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
1421                                         found = true;
1422                                         break;
1423                                 }
1424                         }
1425                 } else {
1426                         netdev_for_each_uc_addr(uca, netdev) {
1427                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
1428                                         found = true;
1429                                         break;
1430                                 }
1431                         }
1432
1433                         for_each_dev_addr(netdev, ha) {
1434                                 if (ether_addr_equal(ha->addr, f->macaddr)) {
1435                                         found = true;
1436                                         break;
1437                                 }
1438                         }
1439                 }
1440                 if (!found)
1441                         i40e_del_filter(
1442                            vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1443         }
1444
1445         /* check for other flag changes */
1446         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1447                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1448                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1449         }
1450 }
1451
1452 /**
1453  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1454  * @vsi: ptr to the VSI
1455  *
1456  * Push any outstanding VSI filter changes through the AdminQ.
1457  *
1458  * Returns 0 or error value
1459  **/
1460 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
1461 {
1462         struct i40e_mac_filter *f, *ftmp;
1463         bool promisc_forced_on = false;
1464         bool add_happened = false;
1465         int filter_list_len = 0;
1466         u32 changed_flags = 0;
1467         i40e_status aq_ret = 0;
1468         struct i40e_pf *pf;
1469         int num_add = 0;
1470         int num_del = 0;
1471         u16 cmd_flags;
1472
1473         /* empty array typed pointers, kcalloc later */
1474         struct i40e_aqc_add_macvlan_element_data *add_list;
1475         struct i40e_aqc_remove_macvlan_element_data *del_list;
1476
1477         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1478                 usleep_range(1000, 2000);
1479         pf = vsi->back;
1480
1481         if (vsi->netdev) {
1482                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1483                 vsi->current_netdev_flags = vsi->netdev->flags;
1484         }
1485
1486         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1487                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1488
1489                 filter_list_len = pf->hw.aq.asq_buf_size /
1490                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1491                 del_list = kcalloc(filter_list_len,
1492                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1493                             GFP_KERNEL);
1494                 if (!del_list)
1495                         return -ENOMEM;
1496
1497                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1498                         if (!f->changed)
1499                                 continue;
1500
1501                         if (f->counter != 0)
1502                                 continue;
1503                         f->changed = false;
1504                         cmd_flags = 0;
1505
1506                         /* add to delete list */
1507                         memcpy(del_list[num_del].mac_addr,
1508                                f->macaddr, ETH_ALEN);
1509                         del_list[num_del].vlan_tag =
1510                                 cpu_to_le16((u16)(f->vlan ==
1511                                             I40E_VLAN_ANY ? 0 : f->vlan));
1512
1513                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1514                         del_list[num_del].flags = cmd_flags;
1515                         num_del++;
1516
1517                         /* unlink from filter list */
1518                         list_del(&f->list);
1519                         kfree(f);
1520
1521                         /* flush a full buffer */
1522                         if (num_del == filter_list_len) {
1523                                 aq_ret = i40e_aq_remove_macvlan(&pf->hw,
1524                                             vsi->seid, del_list, num_del,
1525                                             NULL);
1526                                 num_del = 0;
1527                                 memset(del_list, 0, sizeof(*del_list));
1528
1529                                 if (aq_ret)
1530                                         dev_info(&pf->pdev->dev,
1531                                                  "ignoring delete macvlan error, err %d, aq_err %d while flushing a full buffer\n",
1532                                                  aq_ret,
1533                                                  pf->hw.aq.asq_last_status);
1534                         }
1535                 }
1536                 if (num_del) {
1537                         aq_ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1538                                                      del_list, num_del, NULL);
1539                         num_del = 0;
1540
1541                         if (aq_ret)
1542                                 dev_info(&pf->pdev->dev,
1543                                          "ignoring delete macvlan error, err %d, aq_err %d\n",
1544                                          aq_ret, pf->hw.aq.asq_last_status);
1545                 }
1546
1547                 kfree(del_list);
1548                 del_list = NULL;
1549
1550                 /* do all the adds now */
1551                 filter_list_len = pf->hw.aq.asq_buf_size /
1552                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1553                 add_list = kcalloc(filter_list_len,
1554                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1555                                GFP_KERNEL);
1556                 if (!add_list)
1557                         return -ENOMEM;
1558
1559                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1560                         if (!f->changed)
1561                                 continue;
1562
1563                         if (f->counter == 0)
1564                                 continue;
1565                         f->changed = false;
1566                         add_happened = true;
1567                         cmd_flags = 0;
1568
1569                         /* add to add array */
1570                         memcpy(add_list[num_add].mac_addr,
1571                                f->macaddr, ETH_ALEN);
1572                         add_list[num_add].vlan_tag =
1573                                 cpu_to_le16(
1574                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
1575                         add_list[num_add].queue_number = 0;
1576
1577                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
1578                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
1579                         num_add++;
1580
1581                         /* flush a full buffer */
1582                         if (num_add == filter_list_len) {
1583                                 aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1584                                                              add_list, num_add,
1585                                                              NULL);
1586                                 num_add = 0;
1587
1588                                 if (aq_ret)
1589                                         break;
1590                                 memset(add_list, 0, sizeof(*add_list));
1591                         }
1592                 }
1593                 if (num_add) {
1594                         aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1595                                                      add_list, num_add, NULL);
1596                         num_add = 0;
1597                 }
1598                 kfree(add_list);
1599                 add_list = NULL;
1600
1601                 if (add_happened && (!aq_ret)) {
1602                         /* do nothing */;
1603                 } else if (add_happened && (aq_ret)) {
1604                         dev_info(&pf->pdev->dev,
1605                                  "add filter failed, err %d, aq_err %d\n",
1606                                  aq_ret, pf->hw.aq.asq_last_status);
1607                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
1608                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1609                                       &vsi->state)) {
1610                                 promisc_forced_on = true;
1611                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1612                                         &vsi->state);
1613                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
1614                         }
1615                 }
1616         }
1617
1618         /* check for changes in promiscuous modes */
1619         if (changed_flags & IFF_ALLMULTI) {
1620                 bool cur_multipromisc;
1621                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
1622                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
1623                                                                vsi->seid,
1624                                                                cur_multipromisc,
1625                                                                NULL);
1626                 if (aq_ret)
1627                         dev_info(&pf->pdev->dev,
1628                                  "set multi promisc failed, err %d, aq_err %d\n",
1629                                  aq_ret, pf->hw.aq.asq_last_status);
1630         }
1631         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
1632                 bool cur_promisc;
1633                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
1634                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1635                                         &vsi->state));
1636                 aq_ret = i40e_aq_set_vsi_unicast_promiscuous(&vsi->back->hw,
1637                                                              vsi->seid,
1638                                                              cur_promisc, NULL);
1639                 if (aq_ret)
1640                         dev_info(&pf->pdev->dev,
1641                                  "set uni promisc failed, err %d, aq_err %d\n",
1642                                  aq_ret, pf->hw.aq.asq_last_status);
1643                 aq_ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
1644                                                    vsi->seid,
1645                                                    cur_promisc, NULL);
1646                 if (aq_ret)
1647                         dev_info(&pf->pdev->dev,
1648                                  "set brdcast promisc failed, err %d, aq_err %d\n",
1649                                  aq_ret, pf->hw.aq.asq_last_status);
1650         }
1651
1652         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
1653         return 0;
1654 }
1655
1656 /**
1657  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
1658  * @pf: board private structure
1659  **/
1660 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
1661 {
1662         int v;
1663
1664         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
1665                 return;
1666         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
1667
1668         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
1669                 if (pf->vsi[v] &&
1670                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
1671                         i40e_sync_vsi_filters(pf->vsi[v]);
1672         }
1673 }
1674
1675 /**
1676  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
1677  * @netdev: network interface device structure
1678  * @new_mtu: new value for maximum frame size
1679  *
1680  * Returns 0 on success, negative on failure
1681  **/
1682 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
1683 {
1684         struct i40e_netdev_priv *np = netdev_priv(netdev);
1685         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1686         struct i40e_vsi *vsi = np->vsi;
1687
1688         /* MTU < 68 is an error and causes problems on some kernels */
1689         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1690                 return -EINVAL;
1691
1692         netdev_info(netdev, "changing MTU from %d to %d\n",
1693                     netdev->mtu, new_mtu);
1694         netdev->mtu = new_mtu;
1695         if (netif_running(netdev))
1696                 i40e_vsi_reinit_locked(vsi);
1697
1698         return 0;
1699 }
1700
1701 /**
1702  * i40e_ioctl - Access the hwtstamp interface
1703  * @netdev: network interface device structure
1704  * @ifr: interface request data
1705  * @cmd: ioctl command
1706  **/
1707 int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1708 {
1709         struct i40e_netdev_priv *np = netdev_priv(netdev);
1710         struct i40e_pf *pf = np->vsi->back;
1711
1712         switch (cmd) {
1713         case SIOCGHWTSTAMP:
1714                 return i40e_ptp_get_ts_config(pf, ifr);
1715         case SIOCSHWTSTAMP:
1716                 return i40e_ptp_set_ts_config(pf, ifr);
1717         default:
1718                 return -EOPNOTSUPP;
1719         }
1720 }
1721
1722 /**
1723  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
1724  * @vsi: the vsi being adjusted
1725  **/
1726 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
1727 {
1728         struct i40e_vsi_context ctxt;
1729         i40e_status ret;
1730
1731         if ((vsi->info.valid_sections &
1732              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1733             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
1734                 return;  /* already enabled */
1735
1736         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1737         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1738                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
1739
1740         ctxt.seid = vsi->seid;
1741         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1742         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1743         if (ret) {
1744                 dev_info(&vsi->back->pdev->dev,
1745                          "%s: update vsi failed, aq_err=%d\n",
1746                          __func__, vsi->back->hw.aq.asq_last_status);
1747         }
1748 }
1749
1750 /**
1751  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
1752  * @vsi: the vsi being adjusted
1753  **/
1754 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
1755 {
1756         struct i40e_vsi_context ctxt;
1757         i40e_status ret;
1758
1759         if ((vsi->info.valid_sections &
1760              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1761             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
1762              I40E_AQ_VSI_PVLAN_EMOD_MASK))
1763                 return;  /* already disabled */
1764
1765         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1766         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1767                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
1768
1769         ctxt.seid = vsi->seid;
1770         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1771         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1772         if (ret) {
1773                 dev_info(&vsi->back->pdev->dev,
1774                          "%s: update vsi failed, aq_err=%d\n",
1775                          __func__, vsi->back->hw.aq.asq_last_status);
1776         }
1777 }
1778
1779 /**
1780  * i40e_vlan_rx_register - Setup or shutdown vlan offload
1781  * @netdev: network interface to be adjusted
1782  * @features: netdev features to test if VLAN offload is enabled or not
1783  **/
1784 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
1785 {
1786         struct i40e_netdev_priv *np = netdev_priv(netdev);
1787         struct i40e_vsi *vsi = np->vsi;
1788
1789         if (features & NETIF_F_HW_VLAN_CTAG_RX)
1790                 i40e_vlan_stripping_enable(vsi);
1791         else
1792                 i40e_vlan_stripping_disable(vsi);
1793 }
1794
1795 /**
1796  * i40e_vsi_add_vlan - Add vsi membership for given vlan
1797  * @vsi: the vsi being configured
1798  * @vid: vlan id to be added (0 = untagged only , -1 = any)
1799  **/
1800 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
1801 {
1802         struct i40e_mac_filter *f, *add_f;
1803         bool is_netdev, is_vf;
1804
1805         is_vf = (vsi->type == I40E_VSI_SRIOV);
1806         is_netdev = !!(vsi->netdev);
1807
1808         if (is_netdev) {
1809                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
1810                                         is_vf, is_netdev);
1811                 if (!add_f) {
1812                         dev_info(&vsi->back->pdev->dev,
1813                                  "Could not add vlan filter %d for %pM\n",
1814                                  vid, vsi->netdev->dev_addr);
1815                         return -ENOMEM;
1816                 }
1817         }
1818
1819         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1820                 add_f = i40e_add_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1821                 if (!add_f) {
1822                         dev_info(&vsi->back->pdev->dev,
1823                                  "Could not add vlan filter %d for %pM\n",
1824                                  vid, f->macaddr);
1825                         return -ENOMEM;
1826                 }
1827         }
1828
1829         /* Now if we add a vlan tag, make sure to check if it is the first
1830          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
1831          * with 0, so we now accept untagged and specified tagged traffic
1832          * (and not any taged and untagged)
1833          */
1834         if (vid > 0) {
1835                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
1836                                                   I40E_VLAN_ANY,
1837                                                   is_vf, is_netdev)) {
1838                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
1839                                         I40E_VLAN_ANY, is_vf, is_netdev);
1840                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
1841                                                 is_vf, is_netdev);
1842                         if (!add_f) {
1843                                 dev_info(&vsi->back->pdev->dev,
1844                                          "Could not add filter 0 for %pM\n",
1845                                          vsi->netdev->dev_addr);
1846                                 return -ENOMEM;
1847                         }
1848                 }
1849         }
1850
1851         /* Do not assume that I40E_VLAN_ANY should be reset to VLAN 0 */
1852         if (vid > 0 && !vsi->info.pvid) {
1853                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1854                         if (i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1855                                              is_vf, is_netdev)) {
1856                                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1857                                                 is_vf, is_netdev);
1858                                 add_f = i40e_add_filter(vsi, f->macaddr,
1859                                                         0, is_vf, is_netdev);
1860                                 if (!add_f) {
1861                                         dev_info(&vsi->back->pdev->dev,
1862                                                  "Could not add filter 0 for %pM\n",
1863                                                  f->macaddr);
1864                                         return -ENOMEM;
1865                                 }
1866                         }
1867                 }
1868         }
1869
1870         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1871             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1872                 return 0;
1873
1874         return i40e_sync_vsi_filters(vsi);
1875 }
1876
1877 /**
1878  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
1879  * @vsi: the vsi being configured
1880  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
1881  *
1882  * Return: 0 on success or negative otherwise
1883  **/
1884 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
1885 {
1886         struct net_device *netdev = vsi->netdev;
1887         struct i40e_mac_filter *f, *add_f;
1888         bool is_vf, is_netdev;
1889         int filter_count = 0;
1890
1891         is_vf = (vsi->type == I40E_VSI_SRIOV);
1892         is_netdev = !!(netdev);
1893
1894         if (is_netdev)
1895                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
1896
1897         list_for_each_entry(f, &vsi->mac_filter_list, list)
1898                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1899
1900         /* go through all the filters for this VSI and if there is only
1901          * vid == 0 it means there are no other filters, so vid 0 must
1902          * be replaced with -1. This signifies that we should from now
1903          * on accept any traffic (with any tag present, or untagged)
1904          */
1905         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1906                 if (is_netdev) {
1907                         if (f->vlan &&
1908                             ether_addr_equal(netdev->dev_addr, f->macaddr))
1909                                 filter_count++;
1910                 }
1911
1912                 if (f->vlan)
1913                         filter_count++;
1914         }
1915
1916         if (!filter_count && is_netdev) {
1917                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
1918                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1919                                     is_vf, is_netdev);
1920                 if (!f) {
1921                         dev_info(&vsi->back->pdev->dev,
1922                                  "Could not add filter %d for %pM\n",
1923                                  I40E_VLAN_ANY, netdev->dev_addr);
1924                         return -ENOMEM;
1925                 }
1926         }
1927
1928         if (!filter_count) {
1929                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1930                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
1931                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1932                                             is_vf, is_netdev);
1933                         if (!add_f) {
1934                                 dev_info(&vsi->back->pdev->dev,
1935                                          "Could not add filter %d for %pM\n",
1936                                          I40E_VLAN_ANY, f->macaddr);
1937                                 return -ENOMEM;
1938                         }
1939                 }
1940         }
1941
1942         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1943             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1944                 return 0;
1945
1946         return i40e_sync_vsi_filters(vsi);
1947 }
1948
1949 /**
1950  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
1951  * @netdev: network interface to be adjusted
1952  * @vid: vlan id to be added
1953  *
1954  * net_device_ops implementation for adding vlan ids
1955  **/
1956 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
1957                                 __always_unused __be16 proto, u16 vid)
1958 {
1959         struct i40e_netdev_priv *np = netdev_priv(netdev);
1960         struct i40e_vsi *vsi = np->vsi;
1961         int ret = 0;
1962
1963         if (vid > 4095)
1964                 return -EINVAL;
1965
1966         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
1967
1968         /* If the network stack called us with vid = 0 then
1969          * it is asking to receive priority tagged packets with
1970          * vlan id 0.  Our HW receives them by default when configured
1971          * to receive untagged packets so there is no need to add an
1972          * extra filter for vlan 0 tagged packets.
1973          */
1974         if (vid)
1975                 ret = i40e_vsi_add_vlan(vsi, vid);
1976
1977         if (!ret && (vid < VLAN_N_VID))
1978                 set_bit(vid, vsi->active_vlans);
1979
1980         return ret;
1981 }
1982
1983 /**
1984  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
1985  * @netdev: network interface to be adjusted
1986  * @vid: vlan id to be removed
1987  *
1988  * net_device_ops implementation for adding vlan ids
1989  **/
1990 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
1991                                  __always_unused __be16 proto, u16 vid)
1992 {
1993         struct i40e_netdev_priv *np = netdev_priv(netdev);
1994         struct i40e_vsi *vsi = np->vsi;
1995
1996         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
1997
1998         /* return code is ignored as there is nothing a user
1999          * can do about failure to remove and a log message was
2000          * already printed from the other function
2001          */
2002         i40e_vsi_kill_vlan(vsi, vid);
2003
2004         clear_bit(vid, vsi->active_vlans);
2005
2006         return 0;
2007 }
2008
2009 /**
2010  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
2011  * @vsi: the vsi being brought back up
2012  **/
2013 static void i40e_restore_vlan(struct i40e_vsi *vsi)
2014 {
2015         u16 vid;
2016
2017         if (!vsi->netdev)
2018                 return;
2019
2020         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2021
2022         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
2023                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
2024                                      vid);
2025 }
2026
2027 /**
2028  * i40e_vsi_add_pvid - Add pvid for the VSI
2029  * @vsi: the vsi being adjusted
2030  * @vid: the vlan id to set as a PVID
2031  **/
2032 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2033 {
2034         struct i40e_vsi_context ctxt;
2035         i40e_status aq_ret;
2036
2037         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2038         vsi->info.pvid = cpu_to_le16(vid);
2039         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
2040                                     I40E_AQ_VSI_PVLAN_INSERT_PVID |
2041                                     I40E_AQ_VSI_PVLAN_EMOD_STR;
2042
2043         ctxt.seid = vsi->seid;
2044         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
2045         aq_ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2046         if (aq_ret) {
2047                 dev_info(&vsi->back->pdev->dev,
2048                          "%s: update vsi failed, aq_err=%d\n",
2049                          __func__, vsi->back->hw.aq.asq_last_status);
2050                 return -ENOENT;
2051         }
2052
2053         return 0;
2054 }
2055
2056 /**
2057  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2058  * @vsi: the vsi being adjusted
2059  *
2060  * Just use the vlan_rx_register() service to put it back to normal
2061  **/
2062 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2063 {
2064         i40e_vlan_stripping_disable(vsi);
2065
2066         vsi->info.pvid = 0;
2067 }
2068
2069 /**
2070  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2071  * @vsi: ptr to the VSI
2072  *
2073  * If this function returns with an error, then it's possible one or
2074  * more of the rings is populated (while the rest are not).  It is the
2075  * callers duty to clean those orphaned rings.
2076  *
2077  * Return 0 on success, negative on failure
2078  **/
2079 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2080 {
2081         int i, err = 0;
2082
2083         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2084                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2085
2086         return err;
2087 }
2088
2089 /**
2090  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2091  * @vsi: ptr to the VSI
2092  *
2093  * Free VSI's transmit software resources
2094  **/
2095 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2096 {
2097         int i;
2098
2099         if (!vsi->tx_rings)
2100                 return;
2101
2102         for (i = 0; i < vsi->num_queue_pairs; i++)
2103                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
2104                         i40e_free_tx_resources(vsi->tx_rings[i]);
2105 }
2106
2107 /**
2108  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2109  * @vsi: ptr to the VSI
2110  *
2111  * If this function returns with an error, then it's possible one or
2112  * more of the rings is populated (while the rest are not).  It is the
2113  * callers duty to clean those orphaned rings.
2114  *
2115  * Return 0 on success, negative on failure
2116  **/
2117 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2118 {
2119         int i, err = 0;
2120
2121         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2122                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2123         return err;
2124 }
2125
2126 /**
2127  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2128  * @vsi: ptr to the VSI
2129  *
2130  * Free all receive software resources
2131  **/
2132 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2133 {
2134         int i;
2135
2136         if (!vsi->rx_rings)
2137                 return;
2138
2139         for (i = 0; i < vsi->num_queue_pairs; i++)
2140                 if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
2141                         i40e_free_rx_resources(vsi->rx_rings[i]);
2142 }
2143
2144 /**
2145  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2146  * @ring: The Tx ring to configure
2147  *
2148  * Configure the Tx descriptor ring in the HMC context.
2149  **/
2150 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2151 {
2152         struct i40e_vsi *vsi = ring->vsi;
2153         u16 pf_q = vsi->base_queue + ring->queue_index;
2154         struct i40e_hw *hw = &vsi->back->hw;
2155         struct i40e_hmc_obj_txq tx_ctx;
2156         i40e_status err = 0;
2157         u32 qtx_ctl = 0;
2158
2159         /* some ATR related tx ring init */
2160         if (vsi->back->flags & I40E_FLAG_FD_ATR_ENABLED) {
2161                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2162                 ring->atr_count = 0;
2163         } else {
2164                 ring->atr_sample_rate = 0;
2165         }
2166
2167         /* initialize XPS */
2168         if (ring->q_vector && ring->netdev &&
2169             vsi->tc_config.numtc <= 1 &&
2170             !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2171                 netif_set_xps_queue(ring->netdev,
2172                                     &ring->q_vector->affinity_mask,
2173                                     ring->queue_index);
2174
2175         /* clear the context structure first */
2176         memset(&tx_ctx, 0, sizeof(tx_ctx));
2177
2178         tx_ctx.new_context = 1;
2179         tx_ctx.base = (ring->dma / 128);
2180         tx_ctx.qlen = ring->count;
2181         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FD_SB_ENABLED |
2182                                                I40E_FLAG_FD_ATR_ENABLED));
2183         tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP);
2184
2185         /* As part of VSI creation/update, FW allocates certain
2186          * Tx arbitration queue sets for each TC enabled for
2187          * the VSI. The FW returns the handles to these queue
2188          * sets as part of the response buffer to Add VSI,
2189          * Update VSI, etc. AQ commands. It is expected that
2190          * these queue set handles be associated with the Tx
2191          * queues by the driver as part of the TX queue context
2192          * initialization. This has to be done regardless of
2193          * DCB as by default everything is mapped to TC0.
2194          */
2195         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2196         tx_ctx.rdylist_act = 0;
2197
2198         /* clear the context in the HMC */
2199         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2200         if (err) {
2201                 dev_info(&vsi->back->pdev->dev,
2202                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2203                          ring->queue_index, pf_q, err);
2204                 return -ENOMEM;
2205         }
2206
2207         /* set the context in the HMC */
2208         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2209         if (err) {
2210                 dev_info(&vsi->back->pdev->dev,
2211                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2212                          ring->queue_index, pf_q, err);
2213                 return -ENOMEM;
2214         }
2215
2216         /* Now associate this queue with this PCI function */
2217         if (vsi->type == I40E_VSI_VMDQ2)
2218                 qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
2219         else
2220                 qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2221         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
2222                     I40E_QTX_CTL_PF_INDX_MASK);
2223         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2224         i40e_flush(hw);
2225
2226         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
2227
2228         /* cache tail off for easier writes later */
2229         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2230
2231         return 0;
2232 }
2233
2234 /**
2235  * i40e_configure_rx_ring - Configure a receive ring context
2236  * @ring: The Rx ring to configure
2237  *
2238  * Configure the Rx descriptor ring in the HMC context.
2239  **/
2240 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2241 {
2242         struct i40e_vsi *vsi = ring->vsi;
2243         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2244         u16 pf_q = vsi->base_queue + ring->queue_index;
2245         struct i40e_hw *hw = &vsi->back->hw;
2246         struct i40e_hmc_obj_rxq rx_ctx;
2247         i40e_status err = 0;
2248
2249         ring->state = 0;
2250
2251         /* clear the context structure first */
2252         memset(&rx_ctx, 0, sizeof(rx_ctx));
2253
2254         ring->rx_buf_len = vsi->rx_buf_len;
2255         ring->rx_hdr_len = vsi->rx_hdr_len;
2256
2257         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2258         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2259
2260         rx_ctx.base = (ring->dma / 128);
2261         rx_ctx.qlen = ring->count;
2262
2263         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2264                 set_ring_16byte_desc_enabled(ring);
2265                 rx_ctx.dsize = 0;
2266         } else {
2267                 rx_ctx.dsize = 1;
2268         }
2269
2270         rx_ctx.dtype = vsi->dtype;
2271         if (vsi->dtype) {
2272                 set_ring_ps_enabled(ring);
2273                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2274                                   I40E_RX_SPLIT_IP      |
2275                                   I40E_RX_SPLIT_TCP_UDP |
2276                                   I40E_RX_SPLIT_SCTP;
2277         } else {
2278                 rx_ctx.hsplit_0 = 0;
2279         }
2280
2281         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2282                                   (chain_len * ring->rx_buf_len));
2283         rx_ctx.tphrdesc_ena = 1;
2284         rx_ctx.tphwdesc_ena = 1;
2285         rx_ctx.tphdata_ena = 1;
2286         rx_ctx.tphhead_ena = 1;
2287         if (hw->revision_id == 0)
2288                 rx_ctx.lrxqthresh = 0;
2289         else
2290                 rx_ctx.lrxqthresh = 2;
2291         rx_ctx.crcstrip = 1;
2292         rx_ctx.l2tsel = 1;
2293         rx_ctx.showiv = 1;
2294
2295         /* clear the context in the HMC */
2296         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2297         if (err) {
2298                 dev_info(&vsi->back->pdev->dev,
2299                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2300                          ring->queue_index, pf_q, err);
2301                 return -ENOMEM;
2302         }
2303
2304         /* set the context in the HMC */
2305         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2306         if (err) {
2307                 dev_info(&vsi->back->pdev->dev,
2308                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2309                          ring->queue_index, pf_q, err);
2310                 return -ENOMEM;
2311         }
2312
2313         /* cache tail for quicker writes, and clear the reg before use */
2314         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2315         writel(0, ring->tail);
2316
2317         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
2318
2319         return 0;
2320 }
2321
2322 /**
2323  * i40e_vsi_configure_tx - Configure the VSI for Tx
2324  * @vsi: VSI structure describing this set of rings and resources
2325  *
2326  * Configure the Tx VSI for operation.
2327  **/
2328 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2329 {
2330         int err = 0;
2331         u16 i;
2332
2333         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2334                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2335
2336         return err;
2337 }
2338
2339 /**
2340  * i40e_vsi_configure_rx - Configure the VSI for Rx
2341  * @vsi: the VSI being configured
2342  *
2343  * Configure the Rx VSI for operation.
2344  **/
2345 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2346 {
2347         int err = 0;
2348         u16 i;
2349
2350         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2351                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2352                                + ETH_FCS_LEN + VLAN_HLEN;
2353         else
2354                 vsi->max_frame = I40E_RXBUFFER_2048;
2355
2356         /* figure out correct receive buffer length */
2357         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2358                                     I40E_FLAG_RX_PS_ENABLED)) {
2359         case I40E_FLAG_RX_1BUF_ENABLED:
2360                 vsi->rx_hdr_len = 0;
2361                 vsi->rx_buf_len = vsi->max_frame;
2362                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2363                 break;
2364         case I40E_FLAG_RX_PS_ENABLED:
2365                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2366                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2367                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2368                 break;
2369         default:
2370                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2371                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2372                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2373                 break;
2374         }
2375
2376         /* round up for the chip's needs */
2377         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2378                                 (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
2379         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2380                                 (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
2381
2382         /* set up individual rings */
2383         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2384                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2385
2386         return err;
2387 }
2388
2389 /**
2390  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2391  * @vsi: ptr to the VSI
2392  **/
2393 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2394 {
2395         u16 qoffset, qcount;
2396         int i, n;
2397
2398         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
2399                 return;
2400
2401         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
2402                 if (!(vsi->tc_config.enabled_tc & (1 << n)))
2403                         continue;
2404
2405                 qoffset = vsi->tc_config.tc_info[n].qoffset;
2406                 qcount = vsi->tc_config.tc_info[n].qcount;
2407                 for (i = qoffset; i < (qoffset + qcount); i++) {
2408                         struct i40e_ring *rx_ring = vsi->rx_rings[i];
2409                         struct i40e_ring *tx_ring = vsi->tx_rings[i];
2410                         rx_ring->dcb_tc = n;
2411                         tx_ring->dcb_tc = n;
2412                 }
2413         }
2414 }
2415
2416 /**
2417  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
2418  * @vsi: ptr to the VSI
2419  **/
2420 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
2421 {
2422         if (vsi->netdev)
2423                 i40e_set_rx_mode(vsi->netdev);
2424 }
2425
2426 /**
2427  * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
2428  * @vsi: Pointer to the targeted VSI
2429  *
2430  * This function replays the hlist on the hw where all the SB Flow Director
2431  * filters were saved.
2432  **/
2433 static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
2434 {
2435         struct i40e_fdir_filter *filter;
2436         struct i40e_pf *pf = vsi->back;
2437         struct hlist_node *node;
2438
2439         hlist_for_each_entry_safe(filter, node,
2440                                   &pf->fdir_filter_list, fdir_node) {
2441                 i40e_add_del_fdir(vsi, filter, true);
2442         }
2443 }
2444
2445 /**
2446  * i40e_vsi_configure - Set up the VSI for action
2447  * @vsi: the VSI being configured
2448  **/
2449 static int i40e_vsi_configure(struct i40e_vsi *vsi)
2450 {
2451         int err;
2452
2453         i40e_set_vsi_rx_mode(vsi);
2454         i40e_restore_vlan(vsi);
2455         i40e_vsi_config_dcb_rings(vsi);
2456         if (vsi->type == I40E_VSI_FDIR)
2457                 i40e_fdir_filter_restore(vsi);
2458         err = i40e_vsi_configure_tx(vsi);
2459         if (!err)
2460                 err = i40e_vsi_configure_rx(vsi);
2461
2462         return err;
2463 }
2464
2465 /**
2466  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
2467  * @vsi: the VSI being configured
2468  **/
2469 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
2470 {
2471         struct i40e_pf *pf = vsi->back;
2472         struct i40e_q_vector *q_vector;
2473         struct i40e_hw *hw = &pf->hw;
2474         u16 vector;
2475         int i, q;
2476         u32 val;
2477         u32 qp;
2478
2479         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
2480          * and PFINT_LNKLSTn registers, e.g.:
2481          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
2482          */
2483         qp = vsi->base_queue;
2484         vector = vsi->base_vector;
2485         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
2486                 q_vector = vsi->q_vectors[i];
2487                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2488                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
2489                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
2490                      q_vector->rx.itr);
2491                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2492                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
2493                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
2494                      q_vector->tx.itr);
2495
2496                 /* Linked list for the queuepairs assigned to this vector */
2497                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
2498                 for (q = 0; q < q_vector->num_ringpairs; q++) {
2499                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
2500                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
2501                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
2502                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
2503                               (I40E_QUEUE_TYPE_TX
2504                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
2505
2506                         wr32(hw, I40E_QINT_RQCTL(qp), val);
2507
2508                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
2509                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
2510                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
2511                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
2512                               (I40E_QUEUE_TYPE_RX
2513                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2514
2515                         /* Terminate the linked list */
2516                         if (q == (q_vector->num_ringpairs - 1))
2517                                 val |= (I40E_QUEUE_END_OF_LIST
2518                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2519
2520                         wr32(hw, I40E_QINT_TQCTL(qp), val);
2521                         qp++;
2522                 }
2523         }
2524
2525         i40e_flush(hw);
2526 }
2527
2528 /**
2529  * i40e_enable_misc_int_causes - enable the non-queue interrupts
2530  * @hw: ptr to the hardware info
2531  **/
2532 static void i40e_enable_misc_int_causes(struct i40e_hw *hw)
2533 {
2534         u32 val;
2535
2536         /* clear things first */
2537         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
2538         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
2539
2540         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
2541               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
2542               I40E_PFINT_ICR0_ENA_GRST_MASK          |
2543               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
2544               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
2545               I40E_PFINT_ICR0_ENA_TIMESYNC_MASK      |
2546               I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK  |
2547               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
2548               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
2549               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2550
2551         wr32(hw, I40E_PFINT_ICR0_ENA, val);
2552
2553         /* SW_ITR_IDX = 0, but don't change INTENA */
2554         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
2555                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
2556
2557         /* OTHER_ITR_IDX = 0 */
2558         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
2559 }
2560
2561 /**
2562  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
2563  * @vsi: the VSI being configured
2564  **/
2565 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
2566 {
2567         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
2568         struct i40e_pf *pf = vsi->back;
2569         struct i40e_hw *hw = &pf->hw;
2570         u32 val;
2571
2572         /* set the ITR configuration */
2573         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2574         q_vector->rx.latency_range = I40E_LOW_LATENCY;
2575         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
2576         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2577         q_vector->tx.latency_range = I40E_LOW_LATENCY;
2578         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
2579
2580         i40e_enable_misc_int_causes(hw);
2581
2582         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
2583         wr32(hw, I40E_PFINT_LNKLST0, 0);
2584
2585         /* Associate the queue pair to the vector and enable the queue int */
2586         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
2587               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
2588               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2589
2590         wr32(hw, I40E_QINT_RQCTL(0), val);
2591
2592         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
2593               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
2594               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2595
2596         wr32(hw, I40E_QINT_TQCTL(0), val);
2597         i40e_flush(hw);
2598 }
2599
2600 /**
2601  * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
2602  * @pf: board private structure
2603  **/
2604 void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
2605 {
2606         struct i40e_hw *hw = &pf->hw;
2607
2608         wr32(hw, I40E_PFINT_DYN_CTL0,
2609              I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2610         i40e_flush(hw);
2611 }
2612
2613 /**
2614  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
2615  * @pf: board private structure
2616  **/
2617 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
2618 {
2619         struct i40e_hw *hw = &pf->hw;
2620         u32 val;
2621
2622         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
2623               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
2624               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
2625
2626         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2627         i40e_flush(hw);
2628 }
2629
2630 /**
2631  * i40e_irq_dynamic_enable - Enable default interrupt generation settings
2632  * @vsi: pointer to a vsi
2633  * @vector: enable a particular Hw Interrupt vector
2634  **/
2635 void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector)
2636 {
2637         struct i40e_pf *pf = vsi->back;
2638         struct i40e_hw *hw = &pf->hw;
2639         u32 val;
2640
2641         val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
2642               I40E_PFINT_DYN_CTLN_CLEARPBA_MASK |
2643               (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2644         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
2645         /* skip the flush */
2646 }
2647
2648 /**
2649  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
2650  * @irq: interrupt number
2651  * @data: pointer to a q_vector
2652  **/
2653 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
2654 {
2655         struct i40e_q_vector *q_vector = data;
2656
2657         if (!q_vector->tx.ring && !q_vector->rx.ring)
2658                 return IRQ_HANDLED;
2659
2660         napi_schedule(&q_vector->napi);
2661
2662         return IRQ_HANDLED;
2663 }
2664
2665 /**
2666  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
2667  * @vsi: the VSI being configured
2668  * @basename: name for the vector
2669  *
2670  * Allocates MSI-X vectors and requests interrupts from the kernel.
2671  **/
2672 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
2673 {
2674         int q_vectors = vsi->num_q_vectors;
2675         struct i40e_pf *pf = vsi->back;
2676         int base = vsi->base_vector;
2677         int rx_int_idx = 0;
2678         int tx_int_idx = 0;
2679         int vector, err;
2680
2681         for (vector = 0; vector < q_vectors; vector++) {
2682                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
2683
2684                 if (q_vector->tx.ring && q_vector->rx.ring) {
2685                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2686                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
2687                         tx_int_idx++;
2688                 } else if (q_vector->rx.ring) {
2689                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2690                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
2691                 } else if (q_vector->tx.ring) {
2692                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2693                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
2694                 } else {
2695                         /* skip this unused q_vector */
2696                         continue;
2697                 }
2698                 err = request_irq(pf->msix_entries[base + vector].vector,
2699                                   vsi->irq_handler,
2700                                   0,
2701                                   q_vector->name,
2702                                   q_vector);
2703                 if (err) {
2704                         dev_info(&pf->pdev->dev,
2705                                  "%s: request_irq failed, error: %d\n",
2706                                  __func__, err);
2707                         goto free_queue_irqs;
2708                 }
2709                 /* assign the mask for this irq */
2710                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2711                                       &q_vector->affinity_mask);
2712         }
2713
2714         return 0;
2715
2716 free_queue_irqs:
2717         while (vector) {
2718                 vector--;
2719                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2720                                       NULL);
2721                 free_irq(pf->msix_entries[base + vector].vector,
2722                          &(vsi->q_vectors[vector]));
2723         }
2724         return err;
2725 }
2726
2727 /**
2728  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
2729  * @vsi: the VSI being un-configured
2730  **/
2731 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
2732 {
2733         struct i40e_pf *pf = vsi->back;
2734         struct i40e_hw *hw = &pf->hw;
2735         int base = vsi->base_vector;
2736         int i;
2737
2738         for (i = 0; i < vsi->num_queue_pairs; i++) {
2739                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
2740                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
2741         }
2742
2743         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2744                 for (i = vsi->base_vector;
2745                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2746                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
2747
2748                 i40e_flush(hw);
2749                 for (i = 0; i < vsi->num_q_vectors; i++)
2750                         synchronize_irq(pf->msix_entries[i + base].vector);
2751         } else {
2752                 /* Legacy and MSI mode - this stops all interrupt handling */
2753                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
2754                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
2755                 i40e_flush(hw);
2756                 synchronize_irq(pf->pdev->irq);
2757         }
2758 }
2759
2760 /**
2761  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
2762  * @vsi: the VSI being configured
2763  **/
2764 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
2765 {
2766         struct i40e_pf *pf = vsi->back;
2767         int i;
2768
2769         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2770                 for (i = vsi->base_vector;
2771                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2772                         i40e_irq_dynamic_enable(vsi, i);
2773         } else {
2774                 i40e_irq_dynamic_enable_icr0(pf);
2775         }
2776
2777         i40e_flush(&pf->hw);
2778         return 0;
2779 }
2780
2781 /**
2782  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
2783  * @pf: board private structure
2784  **/
2785 static void i40e_stop_misc_vector(struct i40e_pf *pf)
2786 {
2787         /* Disable ICR 0 */
2788         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
2789         i40e_flush(&pf->hw);
2790 }
2791
2792 /**
2793  * i40e_intr - MSI/Legacy and non-queue interrupt handler
2794  * @irq: interrupt number
2795  * @data: pointer to a q_vector
2796  *
2797  * This is the handler used for all MSI/Legacy interrupts, and deals
2798  * with both queue and non-queue interrupts.  This is also used in
2799  * MSIX mode to handle the non-queue interrupts.
2800  **/
2801 static irqreturn_t i40e_intr(int irq, void *data)
2802 {
2803         struct i40e_pf *pf = (struct i40e_pf *)data;
2804         struct i40e_hw *hw = &pf->hw;
2805         irqreturn_t ret = IRQ_NONE;
2806         u32 icr0, icr0_remaining;
2807         u32 val, ena_mask;
2808
2809         icr0 = rd32(hw, I40E_PFINT_ICR0);
2810         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
2811
2812         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
2813         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
2814                 goto enable_intr;
2815
2816         /* if interrupt but no bits showing, must be SWINT */
2817         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
2818             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
2819                 pf->sw_int_count++;
2820
2821         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
2822         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
2823
2824                 /* temporarily disable queue cause for NAPI processing */
2825                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
2826                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
2827                 wr32(hw, I40E_QINT_RQCTL(0), qval);
2828
2829                 qval = rd32(hw, I40E_QINT_TQCTL(0));
2830                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
2831                 wr32(hw, I40E_QINT_TQCTL(0), qval);
2832
2833                 if (!test_bit(__I40E_DOWN, &pf->state))
2834                         napi_schedule(&pf->vsi[pf->lan_vsi]->q_vectors[0]->napi);
2835         }
2836
2837         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
2838                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2839                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
2840         }
2841
2842         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
2843                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
2844                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
2845         }
2846
2847         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
2848                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
2849                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
2850         }
2851
2852         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
2853                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
2854                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
2855                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
2856                 val = rd32(hw, I40E_GLGEN_RSTAT);
2857                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
2858                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
2859                 if (val == I40E_RESET_CORER)
2860                         pf->corer_count++;
2861                 else if (val == I40E_RESET_GLOBR)
2862                         pf->globr_count++;
2863                 else if (val == I40E_RESET_EMPR)
2864                         pf->empr_count++;
2865         }
2866
2867         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
2868                 icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
2869                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
2870         }
2871
2872         if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
2873                 u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);
2874
2875                 if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) {
2876                         ena_mask &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
2877                         i40e_ptp_tx_hwtstamp(pf);
2878                         prttsyn_stat &= ~I40E_PRTTSYN_STAT_0_TXTIME_MASK;
2879                 }
2880
2881                 wr32(hw, I40E_PRTTSYN_STAT_0, prttsyn_stat);
2882         }
2883
2884         /* If a critical error is pending we have no choice but to reset the
2885          * device.
2886          * Report and mask out any remaining unexpected interrupts.
2887          */
2888         icr0_remaining = icr0 & ena_mask;
2889         if (icr0_remaining) {
2890                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
2891                          icr0_remaining);
2892                 if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
2893                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
2894                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK) ||
2895                     (icr0_remaining & I40E_PFINT_ICR0_MAL_DETECT_MASK)) {
2896                         dev_info(&pf->pdev->dev, "device will be reset\n");
2897                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
2898                         i40e_service_event_schedule(pf);
2899                 }
2900                 ena_mask &= ~icr0_remaining;
2901         }
2902         ret = IRQ_HANDLED;
2903
2904 enable_intr:
2905         /* re-enable interrupt causes */
2906         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
2907         if (!test_bit(__I40E_DOWN, &pf->state)) {
2908                 i40e_service_event_schedule(pf);
2909                 i40e_irq_dynamic_enable_icr0(pf);
2910         }
2911
2912         return ret;
2913 }
2914
2915 /**
2916  * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
2917  * @tx_ring:  tx ring to clean
2918  * @budget:   how many cleans we're allowed
2919  *
2920  * Returns true if there's any budget left (e.g. the clean is finished)
2921  **/
2922 static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
2923 {
2924         struct i40e_vsi *vsi = tx_ring->vsi;
2925         u16 i = tx_ring->next_to_clean;
2926         struct i40e_tx_buffer *tx_buf;
2927         struct i40e_tx_desc *tx_desc;
2928
2929         tx_buf = &tx_ring->tx_bi[i];
2930         tx_desc = I40E_TX_DESC(tx_ring, i);
2931         i -= tx_ring->count;
2932
2933         do {
2934                 struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;
2935
2936                 /* if next_to_watch is not set then there is no work pending */
2937                 if (!eop_desc)
2938                         break;
2939
2940                 /* prevent any other reads prior to eop_desc */
2941                 read_barrier_depends();
2942
2943                 /* if the descriptor isn't done, no work yet to do */
2944                 if (!(eop_desc->cmd_type_offset_bsz &
2945                       cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
2946                         break;
2947
2948                 /* clear next_to_watch to prevent false hangs */
2949                 tx_buf->next_to_watch = NULL;
2950
2951                 /* unmap skb header data */
2952                 dma_unmap_single(tx_ring->dev,
2953                                  dma_unmap_addr(tx_buf, dma),
2954                                  dma_unmap_len(tx_buf, len),
2955                                  DMA_TO_DEVICE);
2956
2957                 dma_unmap_len_set(tx_buf, len, 0);
2958
2959
2960                 /* move to the next desc and buffer to clean */
2961                 tx_buf++;
2962                 tx_desc++;
2963                 i++;
2964                 if (unlikely(!i)) {
2965                         i -= tx_ring->count;
2966                         tx_buf = tx_ring->tx_bi;
2967                         tx_desc = I40E_TX_DESC(tx_ring, 0);
2968                 }
2969
2970                 /* update budget accounting */
2971                 budget--;
2972         } while (likely(budget));
2973
2974         i += tx_ring->count;
2975         tx_ring->next_to_clean = i;
2976
2977         if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED) {
2978                 i40e_irq_dynamic_enable(vsi,
2979                                 tx_ring->q_vector->v_idx + vsi->base_vector);
2980         }
2981         return budget > 0;
2982 }
2983
2984 /**
2985  * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
2986  * @irq: interrupt number
2987  * @data: pointer to a q_vector
2988  **/
2989 static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
2990 {
2991         struct i40e_q_vector *q_vector = data;
2992         struct i40e_vsi *vsi;
2993
2994         if (!q_vector->tx.ring)
2995                 return IRQ_HANDLED;
2996
2997         vsi = q_vector->tx.ring->vsi;
2998         i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);
2999
3000         return IRQ_HANDLED;
3001 }
3002
3003 /**
3004  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
3005  * @vsi: the VSI being configured
3006  * @v_idx: vector index
3007  * @qp_idx: queue pair index
3008  **/
3009 static void map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
3010 {
3011         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3012         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
3013         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
3014
3015         tx_ring->q_vector = q_vector;
3016         tx_ring->next = q_vector->tx.ring;
3017         q_vector->tx.ring = tx_ring;
3018         q_vector->tx.count++;
3019
3020         rx_ring->q_vector = q_vector;
3021         rx_ring->next = q_vector->rx.ring;
3022         q_vector->rx.ring = rx_ring;
3023         q_vector->rx.count++;
3024 }
3025
3026 /**
3027  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
3028  * @vsi: the VSI being configured
3029  *
3030  * This function maps descriptor rings to the queue-specific vectors
3031  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
3032  * one vector per queue pair, but on a constrained vector budget, we
3033  * group the queue pairs as "efficiently" as possible.
3034  **/
3035 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
3036 {
3037         int qp_remaining = vsi->num_queue_pairs;
3038         int q_vectors = vsi->num_q_vectors;
3039         int num_ringpairs;
3040         int v_start = 0;
3041         int qp_idx = 0;
3042
3043         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
3044          * group them so there are multiple queues per vector.
3045          */
3046         for (; v_start < q_vectors && qp_remaining; v_start++) {
3047                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
3048
3049                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
3050
3051                 q_vector->num_ringpairs = num_ringpairs;
3052
3053                 q_vector->rx.count = 0;
3054                 q_vector->tx.count = 0;
3055                 q_vector->rx.ring = NULL;
3056                 q_vector->tx.ring = NULL;
3057
3058                 while (num_ringpairs--) {
3059                         map_vector_to_qp(vsi, v_start, qp_idx);
3060                         qp_idx++;
3061                         qp_remaining--;
3062                 }
3063         }
3064 }
3065
3066 /**
3067  * i40e_vsi_request_irq - Request IRQ from the OS
3068  * @vsi: the VSI being configured
3069  * @basename: name for the vector
3070  **/
3071 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
3072 {
3073         struct i40e_pf *pf = vsi->back;
3074         int err;
3075
3076         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3077                 err = i40e_vsi_request_irq_msix(vsi, basename);
3078         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
3079                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
3080                                   pf->misc_int_name, pf);
3081         else
3082                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
3083                                   pf->misc_int_name, pf);
3084
3085         if (err)
3086                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
3087
3088         return err;
3089 }
3090
3091 #ifdef CONFIG_NET_POLL_CONTROLLER
3092 /**
3093  * i40e_netpoll - A Polling 'interrupt'handler
3094  * @netdev: network interface device structure
3095  *
3096  * This is used by netconsole to send skbs without having to re-enable
3097  * interrupts.  It's not called while the normal interrupt routine is executing.
3098  **/
3099 static void i40e_netpoll(struct net_device *netdev)
3100 {
3101         struct i40e_netdev_priv *np = netdev_priv(netdev);
3102         struct i40e_vsi *vsi = np->vsi;
3103         struct i40e_pf *pf = vsi->back;
3104         int i;
3105
3106         /* if interface is down do nothing */
3107         if (test_bit(__I40E_DOWN, &vsi->state))
3108                 return;
3109
3110         pf->flags |= I40E_FLAG_IN_NETPOLL;
3111         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3112                 for (i = 0; i < vsi->num_q_vectors; i++)
3113                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
3114         } else {
3115                 i40e_intr(pf->pdev->irq, netdev);
3116         }
3117         pf->flags &= ~I40E_FLAG_IN_NETPOLL;
3118 }
3119 #endif
3120
3121 /**
3122  * i40e_vsi_control_tx - Start or stop a VSI's rings
3123  * @vsi: the VSI being configured
3124  * @enable: start or stop the rings
3125  **/
3126 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
3127 {
3128         struct i40e_pf *pf = vsi->back;
3129         struct i40e_hw *hw = &pf->hw;
3130         int i, j, pf_q;
3131         u32 tx_reg;
3132
3133         pf_q = vsi->base_queue;
3134         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3135                 for (j = 0; j < 50; j++) {
3136                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3137                         if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
3138                             ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
3139                                 break;
3140                         usleep_range(1000, 2000);
3141                 }
3142                 /* Skip if the queue is already in the requested state */
3143                 if (enable && (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3144                         continue;
3145                 if (!enable && !(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3146                         continue;
3147
3148                 /* turn on/off the queue */
3149                 if (enable) {
3150                         wr32(hw, I40E_QTX_HEAD(pf_q), 0);
3151                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
3152                 } else {
3153                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
3154                 }
3155
3156                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
3157
3158                 /* wait for the change to finish */
3159                 for (j = 0; j < 10; j++) {
3160                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3161                         if (enable) {
3162                                 if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3163                                         break;
3164                         } else {
3165                                 if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3166                                         break;
3167                         }
3168
3169                         udelay(10);
3170                 }
3171                 if (j >= 10) {
3172                         dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
3173                                  pf_q, (enable ? "en" : "dis"));
3174                         return -ETIMEDOUT;
3175                 }
3176         }
3177
3178         if (hw->revision_id == 0)
3179                 mdelay(50);
3180
3181         return 0;
3182 }
3183
3184 /**
3185  * i40e_vsi_control_rx - Start or stop a VSI's rings
3186  * @vsi: the VSI being configured
3187  * @enable: start or stop the rings
3188  **/
3189 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3190 {
3191         struct i40e_pf *pf = vsi->back;
3192         struct i40e_hw *hw = &pf->hw;
3193         int i, j, pf_q;
3194         u32 rx_reg;
3195
3196         pf_q = vsi->base_queue;
3197         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3198                 for (j = 0; j < 50; j++) {
3199                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3200                         if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
3201                             ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
3202                                 break;
3203                         usleep_range(1000, 2000);
3204                 }
3205
3206                 if (enable) {
3207                         /* is STAT set ? */
3208                         if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3209                                 continue;
3210                 } else {
3211                         /* is !STAT set ? */
3212                         if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3213                                 continue;
3214                 }
3215
3216                 /* turn on/off the queue */
3217                 if (enable)
3218                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
3219                 else
3220                         rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;
3221                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3222
3223                 /* wait for the change to finish */
3224                 for (j = 0; j < 10; j++) {
3225                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3226
3227                         if (enable) {
3228                                 if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3229                                         break;
3230                         } else {
3231                                 if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3232                                         break;
3233                         }
3234
3235                         udelay(10);
3236                 }
3237                 if (j >= 10) {
3238                         dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
3239                                  pf_q, (enable ? "en" : "dis"));
3240                         return -ETIMEDOUT;
3241                 }
3242         }
3243
3244         return 0;
3245 }
3246
3247 /**
3248  * i40e_vsi_control_rings - Start or stop a VSI's rings
3249  * @vsi: the VSI being configured
3250  * @enable: start or stop the rings
3251  **/
3252 int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3253 {
3254         int ret = 0;
3255
3256         /* do rx first for enable and last for disable */
3257         if (request) {
3258                 ret = i40e_vsi_control_rx(vsi, request);
3259                 if (ret)
3260                         return ret;
3261                 ret = i40e_vsi_control_tx(vsi, request);
3262         } else {
3263                 /* Ignore return value, we need to shutdown whatever we can */
3264                 i40e_vsi_control_tx(vsi, request);
3265                 i40e_vsi_control_rx(vsi, request);
3266         }
3267
3268         return ret;
3269 }
3270
3271 /**
3272  * i40e_vsi_free_irq - Free the irq association with the OS
3273  * @vsi: the VSI being configured
3274  **/
3275 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3276 {
3277         struct i40e_pf *pf = vsi->back;
3278         struct i40e_hw *hw = &pf->hw;
3279         int base = vsi->base_vector;
3280         u32 val, qp;
3281         int i;
3282
3283         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3284                 if (!vsi->q_vectors)
3285                         return;
3286
3287                 for (i = 0; i < vsi->num_q_vectors; i++) {
3288                         u16 vector = i + base;
3289
3290                         /* free only the irqs that were actually requested */
3291                         if (!vsi->q_vectors[i] ||
3292                             !vsi->q_vectors[i]->num_ringpairs)
3293                                 continue;
3294
3295                         /* clear the affinity_mask in the IRQ descriptor */
3296                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3297                                               NULL);
3298                         free_irq(pf->msix_entries[vector].vector,
3299                                  vsi->q_vectors[i]);
3300
3301                         /* Tear down the interrupt queue link list
3302                          *
3303                          * We know that they come in pairs and always
3304                          * the Rx first, then the Tx.  To clear the
3305                          * link list, stick the EOL value into the
3306                          * next_q field of the registers.
3307                          */
3308                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3309                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3310                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3311                         val |= I40E_QUEUE_END_OF_LIST
3312                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3313                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
3314
3315                         while (qp != I40E_QUEUE_END_OF_LIST) {
3316                                 u32 next;
3317
3318                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3319
3320                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3321                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3322                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3323                                          I40E_QINT_RQCTL_INTEVENT_MASK);
3324
3325                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3326                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3327
3328                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3329
3330                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3331
3332                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
3333                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
3334
3335                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3336                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3337                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3338                                          I40E_QINT_TQCTL_INTEVENT_MASK);
3339
3340                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3341                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3342
3343                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3344                                 qp = next;
3345                         }
3346                 }
3347         } else {
3348                 free_irq(pf->pdev->irq, pf);
3349
3350                 val = rd32(hw, I40E_PFINT_LNKLST0);
3351                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3352                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3353                 val |= I40E_QUEUE_END_OF_LIST
3354                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
3355                 wr32(hw, I40E_PFINT_LNKLST0, val);
3356
3357                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3358                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3359                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3360                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3361                          I40E_QINT_RQCTL_INTEVENT_MASK);
3362
3363                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3364                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3365
3366                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3367
3368                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3369
3370                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3371                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3372                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3373                          I40E_QINT_TQCTL_INTEVENT_MASK);
3374
3375                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3376                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3377
3378                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3379         }
3380 }
3381
3382 /**
3383  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
3384  * @vsi: the VSI being configured
3385  * @v_idx: Index of vector to be freed
3386  *
3387  * This function frees the memory allocated to the q_vector.  In addition if
3388  * NAPI is enabled it will delete any references to the NAPI struct prior
3389  * to freeing the q_vector.
3390  **/
3391 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
3392 {
3393         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3394         struct i40e_ring *ring;
3395
3396         if (!q_vector)
3397                 return;
3398
3399         /* disassociate q_vector from rings */
3400         i40e_for_each_ring(ring, q_vector->tx)
3401                 ring->q_vector = NULL;
3402
3403         i40e_for_each_ring(ring, q_vector->rx)
3404                 ring->q_vector = NULL;
3405
3406         /* only VSI w/ an associated netdev is set up w/ NAPI */
3407         if (vsi->netdev)
3408                 netif_napi_del(&q_vector->napi);
3409
3410         vsi->q_vectors[v_idx] = NULL;
3411
3412         kfree_rcu(q_vector, rcu);
3413 }
3414
3415 /**
3416  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
3417  * @vsi: the VSI being un-configured
3418  *
3419  * This frees the memory allocated to the q_vectors and
3420  * deletes references to the NAPI struct.
3421  **/
3422 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
3423 {
3424         int v_idx;
3425
3426         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
3427                 i40e_free_q_vector(vsi, v_idx);
3428 }
3429
3430 /**
3431  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
3432  * @pf: board private structure
3433  **/
3434 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
3435 {
3436         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
3437         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3438                 pci_disable_msix(pf->pdev);
3439                 kfree(pf->msix_entries);
3440                 pf->msix_entries = NULL;
3441         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
3442                 pci_disable_msi(pf->pdev);
3443         }
3444         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
3445 }
3446
3447 /**
3448  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
3449  * @pf: board private structure
3450  *
3451  * We go through and clear interrupt specific resources and reset the structure
3452  * to pre-load conditions
3453  **/
3454 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
3455 {
3456         int i;
3457
3458         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
3459         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
3460                 if (pf->vsi[i])
3461                         i40e_vsi_free_q_vectors(pf->vsi[i]);
3462         i40e_reset_interrupt_capability(pf);
3463 }
3464
3465 /**
3466  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
3467  * @vsi: the VSI being configured
3468  **/
3469 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
3470 {
3471         int q_idx;
3472
3473         if (!vsi->netdev)
3474                 return;
3475
3476         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3477                 napi_enable(&vsi->q_vectors[q_idx]->napi);
3478 }
3479
3480 /**
3481  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
3482  * @vsi: the VSI being configured
3483  **/
3484 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
3485 {
3486         int q_idx;
3487
3488         if (!vsi->netdev)
3489                 return;
3490
3491         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3492                 napi_disable(&vsi->q_vectors[q_idx]->napi);
3493 }
3494
3495 /**
3496  * i40e_quiesce_vsi - Pause a given VSI
3497  * @vsi: the VSI being paused
3498  **/
3499 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
3500 {
3501         if (test_bit(__I40E_DOWN, &vsi->state))
3502                 return;
3503
3504         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
3505         if (vsi->netdev && netif_running(vsi->netdev)) {
3506                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
3507         } else {
3508                 set_bit(__I40E_DOWN, &vsi->state);
3509                 i40e_down(vsi);
3510         }
3511 }
3512
3513 /**
3514  * i40e_unquiesce_vsi - Resume a given VSI
3515  * @vsi: the VSI being resumed
3516  **/
3517 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
3518 {
3519         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
3520                 return;
3521
3522         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
3523         if (vsi->netdev && netif_running(vsi->netdev))
3524                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
3525         else
3526                 i40e_up(vsi);   /* this clears the DOWN bit */
3527 }
3528
3529 /**
3530  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
3531  * @pf: the PF
3532  **/
3533 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
3534 {
3535         int v;
3536
3537         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3538                 if (pf->vsi[v])
3539                         i40e_quiesce_vsi(pf->vsi[v]);
3540         }
3541 }
3542
3543 /**
3544  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
3545  * @pf: the PF
3546  **/
3547 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
3548 {
3549         int v;
3550
3551         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3552                 if (pf->vsi[v])
3553                         i40e_unquiesce_vsi(pf->vsi[v]);
3554         }
3555 }
3556
3557 /**
3558  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
3559  * @dcbcfg: the corresponding DCBx configuration structure
3560  *
3561  * Return the number of TCs from given DCBx configuration
3562  **/
3563 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
3564 {
3565         u8 num_tc = 0;
3566         int i;
3567
3568         /* Scan the ETS Config Priority Table to find
3569          * traffic class enabled for a given priority
3570          * and use the traffic class index to get the
3571          * number of traffic classes enabled
3572          */
3573         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3574                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
3575                         num_tc = dcbcfg->etscfg.prioritytable[i];
3576         }
3577
3578         /* Traffic class index starts from zero so
3579          * increment to return the actual count
3580          */
3581         return num_tc + 1;
3582 }
3583
3584 /**
3585  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
3586  * @dcbcfg: the corresponding DCBx configuration structure
3587  *
3588  * Query the current DCB configuration and return the number of
3589  * traffic classes enabled from the given DCBX config
3590  **/
3591 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
3592 {
3593         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
3594         u8 enabled_tc = 1;
3595         u8 i;
3596
3597         for (i = 0; i < num_tc; i++)
3598                 enabled_tc |= 1 << i;
3599
3600         return enabled_tc;
3601 }
3602
3603 /**
3604  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
3605  * @pf: PF being queried
3606  *
3607  * Return number of traffic classes enabled for the given PF
3608  **/
3609 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
3610 {
3611         struct i40e_hw *hw = &pf->hw;
3612         u8 i, enabled_tc;
3613         u8 num_tc = 0;
3614         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3615
3616         /* If DCB is not enabled then always in single TC */
3617         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3618                 return 1;
3619
3620         /* MFP mode return count of enabled TCs for this PF */
3621         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3622                 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3623                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3624                         if (enabled_tc & (1 << i))
3625                                 num_tc++;
3626                 }
3627                 return num_tc;
3628         }
3629
3630         /* SFP mode will be enabled for all TCs on port */
3631         return i40e_dcb_get_num_tc(dcbcfg);
3632 }
3633
3634 /**
3635  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
3636  * @pf: PF being queried
3637  *
3638  * Return a bitmap for first enabled traffic class for this PF.
3639  **/
3640 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
3641 {
3642         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3643         u8 i = 0;
3644
3645         if (!enabled_tc)
3646                 return 0x1; /* TC0 */
3647
3648         /* Find the first enabled TC */
3649         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3650                 if (enabled_tc & (1 << i))
3651                         break;
3652         }
3653
3654         return 1 << i;
3655 }
3656
3657 /**
3658  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
3659  * @pf: PF being queried
3660  *
3661  * Return a bitmap for enabled traffic classes for this PF.
3662  **/
3663 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
3664 {
3665         /* If DCB is not enabled for this PF then just return default TC */
3666         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3667                 return i40e_pf_get_default_tc(pf);
3668
3669         /* MFP mode will have enabled TCs set by FW */
3670         if (pf->flags & I40E_FLAG_MFP_ENABLED)
3671                 return pf->hw.func_caps.enabled_tcmap;
3672
3673         /* SFP mode we want PF to be enabled for all TCs */
3674         return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
3675 }
3676
3677 /**
3678  * i40e_vsi_get_bw_info - Query VSI BW Information
3679  * @vsi: the VSI being queried
3680  *
3681  * Returns 0 on success, negative value on failure
3682  **/
3683 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
3684 {
3685         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
3686         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
3687         struct i40e_pf *pf = vsi->back;
3688         struct i40e_hw *hw = &pf->hw;
3689         i40e_status aq_ret;
3690         u32 tc_bw_max;
3691         int i;
3692
3693         /* Get the VSI level BW configuration */
3694         aq_ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
3695         if (aq_ret) {
3696                 dev_info(&pf->pdev->dev,
3697                          "couldn't get pf vsi bw config, err %d, aq_err %d\n",
3698                          aq_ret, pf->hw.aq.asq_last_status);
3699                 return -EINVAL;
3700         }
3701
3702         /* Get the VSI level BW configuration per TC */
3703         aq_ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
3704                                                   NULL);
3705         if (aq_ret) {
3706                 dev_info(&pf->pdev->dev,
3707                          "couldn't get pf vsi ets bw config, err %d, aq_err %d\n",
3708                          aq_ret, pf->hw.aq.asq_last_status);
3709                 return -EINVAL;
3710         }
3711
3712         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
3713                 dev_info(&pf->pdev->dev,
3714                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
3715                          bw_config.tc_valid_bits,
3716                          bw_ets_config.tc_valid_bits);
3717                 /* Still continuing */
3718         }
3719
3720         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
3721         vsi->bw_max_quanta = bw_config.max_bw;
3722         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
3723                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
3724         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3725                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
3726                 vsi->bw_ets_limit_credits[i] =
3727                                         le16_to_cpu(bw_ets_config.credits[i]);
3728                 /* 3 bits out of 4 for each TC */
3729                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
3730         }
3731
3732         return 0;
3733 }
3734
3735 /**
3736  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
3737  * @vsi: the VSI being configured
3738  * @enabled_tc: TC bitmap
3739  * @bw_credits: BW shared credits per TC
3740  *
3741  * Returns 0 on success, negative value on failure
3742  **/
3743 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
3744                                        u8 *bw_share)
3745 {
3746         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
3747         i40e_status aq_ret;
3748         int i;
3749
3750         bw_data.tc_valid_bits = enabled_tc;
3751         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3752                 bw_data.tc_bw_credits[i] = bw_share[i];
3753
3754         aq_ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
3755                                           NULL);
3756         if (aq_ret) {
3757                 dev_info(&vsi->back->pdev->dev,
3758                          "AQ command Config VSI BW allocation per TC failed = %d\n",
3759                          vsi->back->hw.aq.asq_last_status);
3760                 return -EINVAL;
3761         }
3762
3763         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3764                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
3765
3766         return 0;
3767 }
3768
3769 /**
3770  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
3771  * @vsi: the VSI being configured
3772  * @enabled_tc: TC map to be enabled
3773  *
3774  **/
3775 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3776 {
3777         struct net_device *netdev = vsi->netdev;
3778         struct i40e_pf *pf = vsi->back;
3779         struct i40e_hw *hw = &pf->hw;
3780         u8 netdev_tc = 0;
3781         int i;
3782         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3783
3784         if (!netdev)
3785                 return;
3786
3787         if (!enabled_tc) {
3788                 netdev_reset_tc(netdev);
3789                 return;
3790         }
3791
3792         /* Set up actual enabled TCs on the VSI */
3793         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
3794                 return;
3795
3796         /* set per TC queues for the VSI */
3797         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3798                 /* Only set TC queues for enabled tcs
3799                  *
3800                  * e.g. For a VSI that has TC0 and TC3 enabled the
3801                  * enabled_tc bitmap would be 0x00001001; the driver
3802                  * will set the numtc for netdev as 2 that will be
3803                  * referenced by the netdev layer as TC 0 and 1.
3804                  */
3805                 if (vsi->tc_config.enabled_tc & (1 << i))
3806                         netdev_set_tc_queue(netdev,
3807                                         vsi->tc_config.tc_info[i].netdev_tc,
3808                                         vsi->tc_config.tc_info[i].qcount,
3809                                         vsi->tc_config.tc_info[i].qoffset);
3810         }
3811
3812         /* Assign UP2TC map for the VSI */
3813         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3814                 /* Get the actual TC# for the UP */
3815                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
3816                 /* Get the mapped netdev TC# for the UP */
3817                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
3818                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
3819         }
3820 }
3821
3822 /**
3823  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
3824  * @vsi: the VSI being configured
3825  * @ctxt: the ctxt buffer returned from AQ VSI update param command
3826  **/
3827 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
3828                                       struct i40e_vsi_context *ctxt)
3829 {
3830         /* copy just the sections touched not the entire info
3831          * since not all sections are valid as returned by
3832          * update vsi params
3833          */
3834         vsi->info.mapping_flags = ctxt->info.mapping_flags;
3835         memcpy(&vsi->info.queue_mapping,
3836                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
3837         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
3838                sizeof(vsi->info.tc_mapping));
3839 }
3840
3841 /**
3842  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
3843  * @vsi: VSI to be configured
3844  * @enabled_tc: TC bitmap
3845  *
3846  * This configures a particular VSI for TCs that are mapped to the
3847  * given TC bitmap. It uses default bandwidth share for TCs across
3848  * VSIs to configure TC for a particular VSI.
3849  *
3850  * NOTE:
3851  * It is expected that the VSI queues have been quisced before calling
3852  * this function.
3853  **/
3854 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3855 {
3856         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
3857         struct i40e_vsi_context ctxt;
3858         int ret = 0;
3859         int i;
3860
3861         /* Check if enabled_tc is same as existing or new TCs */
3862         if (vsi->tc_config.enabled_tc == enabled_tc)
3863                 return ret;
3864
3865         /* Enable ETS TCs with equal BW Share for now across all VSIs */
3866         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3867                 if (enabled_tc & (1 << i))
3868                         bw_share[i] = 1;
3869         }
3870
3871         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
3872         if (ret) {
3873                 dev_info(&vsi->back->pdev->dev,
3874                          "Failed configuring TC map %d for VSI %d\n",
3875                          enabled_tc, vsi->seid);
3876                 goto out;
3877         }
3878
3879         /* Update Queue Pairs Mapping for currently enabled UPs */
3880         ctxt.seid = vsi->seid;
3881         ctxt.pf_num = vsi->back->hw.pf_id;
3882         ctxt.vf_num = 0;
3883         ctxt.uplink_seid = vsi->uplink_seid;
3884         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
3885         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
3886
3887         /* Update the VSI after updating the VSI queue-mapping information */
3888         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
3889         if (ret) {
3890                 dev_info(&vsi->back->pdev->dev,
3891                          "update vsi failed, aq_err=%d\n",
3892                          vsi->back->hw.aq.asq_last_status);
3893                 goto out;
3894         }
3895         /* update the local VSI info with updated queue map */
3896         i40e_vsi_update_queue_map(vsi, &ctxt);
3897         vsi->info.valid_sections = 0;
3898
3899         /* Update current VSI BW information */
3900         ret = i40e_vsi_get_bw_info(vsi);
3901         if (ret) {
3902                 dev_info(&vsi->back->pdev->dev,
3903                          "Failed updating vsi bw info, aq_err=%d\n",
3904                          vsi->back->hw.aq.asq_last_status);
3905                 goto out;
3906         }
3907
3908         /* Update the netdev TC setup */
3909         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
3910 out:
3911         return ret;
3912 }
3913
3914 /**
3915  * i40e_veb_config_tc - Configure TCs for given VEB
3916  * @veb: given VEB
3917  * @enabled_tc: TC bitmap
3918  *
3919  * Configures given TC bitmap for VEB (switching) element
3920  **/
3921 int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
3922 {
3923         struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
3924         struct i40e_pf *pf = veb->pf;
3925         int ret = 0;
3926         int i;
3927
3928         /* No TCs or already enabled TCs just return */
3929         if (!enabled_tc || veb->enabled_tc == enabled_tc)
3930                 return ret;
3931
3932         bw_data.tc_valid_bits = enabled_tc;
3933         /* bw_data.absolute_credits is not set (relative) */
3934
3935         /* Enable ETS TCs with equal BW Share for now */
3936         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3937                 if (enabled_tc & (1 << i))
3938                         bw_data.tc_bw_share_credits[i] = 1;
3939         }
3940
3941         ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
3942                                                    &bw_data, NULL);
3943         if (ret) {
3944                 dev_info(&pf->pdev->dev,
3945                          "veb bw config failed, aq_err=%d\n",
3946                          pf->hw.aq.asq_last_status);
3947                 goto out;
3948         }
3949
3950         /* Update the BW information */
3951         ret = i40e_veb_get_bw_info(veb);
3952         if (ret) {
3953                 dev_info(&pf->pdev->dev,
3954                          "Failed getting veb bw config, aq_err=%d\n",
3955                          pf->hw.aq.asq_last_status);
3956         }
3957
3958 out:
3959         return ret;
3960 }
3961
3962 #ifdef CONFIG_I40E_DCB
3963 /**
3964  * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
3965  * @pf: PF struct
3966  *
3967  * Reconfigure VEB/VSIs on a given PF; it is assumed that
3968  * the caller would've quiesce all the VSIs before calling
3969  * this function
3970  **/
3971 static void i40e_dcb_reconfigure(struct i40e_pf *pf)
3972 {
3973         u8 tc_map = 0;
3974         int ret;
3975         u8 v;
3976
3977         /* Enable the TCs available on PF to all VEBs */
3978         tc_map = i40e_pf_get_tc_map(pf);
3979         for (v = 0; v < I40E_MAX_VEB; v++) {
3980                 if (!pf->veb[v])
3981                         continue;
3982                 ret = i40e_veb_config_tc(pf->veb[v], tc_map);
3983                 if (ret) {
3984                         dev_info(&pf->pdev->dev,
3985                                  "Failed configuring TC for VEB seid=%d\n",
3986                                  pf->veb[v]->seid);
3987                         /* Will try to configure as many components */
3988                 }
3989         }
3990
3991         /* Update each VSI */
3992         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3993                 if (!pf->vsi[v])
3994                         continue;
3995
3996                 /* - Enable all TCs for the LAN VSI
3997                  * - For all others keep them at TC0 for now
3998                  */
3999                 if (v == pf->lan_vsi)
4000                         tc_map = i40e_pf_get_tc_map(pf);
4001                 else
4002                         tc_map = i40e_pf_get_default_tc(pf);
4003
4004                 ret = i40e_vsi_config_tc(pf->vsi[v], tc_map);
4005                 if (ret) {
4006                         dev_info(&pf->pdev->dev,
4007                                  "Failed configuring TC for VSI seid=%d\n",
4008                                  pf->vsi[v]->seid);
4009                         /* Will try to configure as many components */
4010                 } else {
4011                         if (pf->vsi[v]->netdev)
4012                                 i40e_dcbnl_set_all(pf->vsi[v]);
4013                 }
4014         }
4015 }
4016
4017 /**
4018  * i40e_init_pf_dcb - Initialize DCB configuration
4019  * @pf: PF being configured
4020  *
4021  * Query the current DCB configuration and cache it
4022  * in the hardware structure
4023  **/
4024 static int i40e_init_pf_dcb(struct i40e_pf *pf)
4025 {
4026         struct i40e_hw *hw = &pf->hw;
4027         int err = 0;
4028
4029         if (pf->hw.func_caps.npar_enable)
4030                 goto out;
4031
4032         /* Get the initial DCB configuration */
4033         err = i40e_init_dcb(hw);
4034         if (!err) {
4035                 /* Device/Function is not DCBX capable */
4036                 if ((!hw->func_caps.dcb) ||
4037                     (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
4038                         dev_info(&pf->pdev->dev,
4039                                  "DCBX offload is not supported or is disabled for this PF.\n");
4040
4041                         if (pf->flags & I40E_FLAG_MFP_ENABLED)
4042                                 goto out;
4043
4044                 } else {
4045                         /* When status is not DISABLED then DCBX in FW */
4046                         pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
4047                                        DCB_CAP_DCBX_VER_IEEE;
4048                         pf->flags |= I40E_FLAG_DCB_ENABLED;
4049                 }
4050         }
4051
4052 out:
4053         return err;
4054 }
4055 #endif /* CONFIG_I40E_DCB */
4056
4057 /**
4058  * i40e_up_complete - Finish the last steps of bringing up a connection
4059  * @vsi: the VSI being configured
4060  **/
4061 static int i40e_up_complete(struct i40e_vsi *vsi)
4062 {
4063         struct i40e_pf *pf = vsi->back;
4064         int err;
4065
4066         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4067                 i40e_vsi_configure_msix(vsi);
4068         else
4069                 i40e_configure_msi_and_legacy(vsi);
4070
4071         /* start rings */
4072         err = i40e_vsi_control_rings(vsi, true);
4073         if (err)
4074                 return err;
4075
4076         clear_bit(__I40E_DOWN, &vsi->state);
4077         i40e_napi_enable_all(vsi);
4078         i40e_vsi_enable_irq(vsi);
4079
4080         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
4081             (vsi->netdev)) {
4082                 netdev_info(vsi->netdev, "NIC Link is Up\n");
4083                 netif_tx_start_all_queues(vsi->netdev);
4084                 netif_carrier_on(vsi->netdev);
4085         } else if (vsi->netdev) {
4086                 netdev_info(vsi->netdev, "NIC Link is Down\n");
4087         }
4088         i40e_service_event_schedule(pf);
4089
4090         return 0;
4091 }
4092
4093 /**
4094  * i40e_vsi_reinit_locked - Reset the VSI
4095  * @vsi: the VSI being configured
4096  *
4097  * Rebuild the ring structs after some configuration
4098  * has changed, e.g. MTU size.
4099  **/
4100 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
4101 {
4102         struct i40e_pf *pf = vsi->back;
4103
4104         WARN_ON(in_interrupt());
4105         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
4106                 usleep_range(1000, 2000);
4107         i40e_down(vsi);
4108
4109         /* Give a VF some time to respond to the reset.  The
4110          * two second wait is based upon the watchdog cycle in
4111          * the VF driver.
4112          */
4113         if (vsi->type == I40E_VSI_SRIOV)
4114                 msleep(2000);
4115         i40e_up(vsi);
4116         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
4117 }
4118
4119 /**
4120  * i40e_up - Bring the connection back up after being down
4121  * @vsi: the VSI being configured
4122  **/
4123 int i40e_up(struct i40e_vsi *vsi)
4124 {
4125         int err;
4126
4127         err = i40e_vsi_configure(vsi);
4128         if (!err)
4129                 err = i40e_up_complete(vsi);
4130
4131         return err;
4132 }
4133
4134 /**
4135  * i40e_down - Shutdown the connection processing
4136  * @vsi: the VSI being stopped
4137  **/
4138 void i40e_down(struct i40e_vsi *vsi)
4139 {
4140         int i;
4141
4142         /* It is assumed that the caller of this function
4143          * sets the vsi->state __I40E_DOWN bit.
4144          */
4145         if (vsi->netdev) {
4146                 netif_carrier_off(vsi->netdev);
4147                 netif_tx_disable(vsi->netdev);
4148         }
4149         i40e_vsi_disable_irq(vsi);
4150         i40e_vsi_control_rings(vsi, false);
4151         i40e_napi_disable_all(vsi);
4152
4153         for (i = 0; i < vsi->num_queue_pairs; i++) {
4154                 i40e_clean_tx_ring(vsi->tx_rings[i]);
4155                 i40e_clean_rx_ring(vsi->rx_rings[i]);
4156         }
4157 }
4158
4159 /**
4160  * i40e_setup_tc - configure multiple traffic classes
4161  * @netdev: net device to configure
4162  * @tc: number of traffic classes to enable
4163  **/
4164 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
4165 {
4166         struct i40e_netdev_priv *np = netdev_priv(netdev);
4167         struct i40e_vsi *vsi = np->vsi;
4168         struct i40e_pf *pf = vsi->back;
4169         u8 enabled_tc = 0;
4170         int ret = -EINVAL;
4171         int i;
4172
4173         /* Check if DCB enabled to continue */
4174         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
4175                 netdev_info(netdev, "DCB is not enabled for adapter\n");
4176                 goto exit;
4177         }
4178
4179         /* Check if MFP enabled */
4180         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
4181                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
4182                 goto exit;
4183         }
4184
4185         /* Check whether tc count is within enabled limit */
4186         if (tc > i40e_pf_get_num_tc(pf)) {
4187                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
4188                 goto exit;
4189         }
4190
4191         /* Generate TC map for number of tc requested */
4192         for (i = 0; i < tc; i++)
4193                 enabled_tc |= (1 << i);
4194
4195         /* Requesting same TC configuration as already enabled */
4196         if (enabled_tc == vsi->tc_config.enabled_tc)
4197                 return 0;
4198
4199         /* Quiesce VSI queues */
4200         i40e_quiesce_vsi(vsi);
4201
4202         /* Configure VSI for enabled TCs */
4203         ret = i40e_vsi_config_tc(vsi, enabled_tc);
4204         if (ret) {
4205                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
4206                             vsi->seid);
4207                 goto exit;
4208         }
4209
4210         /* Unquiesce VSI */
4211         i40e_unquiesce_vsi(vsi);
4212
4213 exit:
4214         return ret;
4215 }
4216
4217 /**
4218  * i40e_open - Called when a network interface is made active
4219  * @netdev: network interface device structure
4220  *
4221  * The open entry point is called when a network interface is made
4222  * active by the system (IFF_UP).  At this point all resources needed
4223  * for transmit and receive operations are allocated, the interrupt
4224  * handler is registered with the OS, the netdev watchdog subtask is
4225  * enabled, and the stack is notified that the interface is ready.
4226  *
4227  * Returns 0 on success, negative value on failure
4228  **/
4229 static int i40e_open(struct net_device *netdev)
4230 {
4231         struct i40e_netdev_priv *np = netdev_priv(netdev);
4232         struct i40e_vsi *vsi = np->vsi;
4233         struct i40e_pf *pf = vsi->back;
4234         char int_name[IFNAMSIZ];
4235         int err;
4236
4237         /* disallow open during test */
4238         if (test_bit(__I40E_TESTING, &pf->state))
4239                 return -EBUSY;
4240
4241         netif_carrier_off(netdev);
4242
4243         /* allocate descriptors */
4244         err = i40e_vsi_setup_tx_resources(vsi);
4245         if (err)
4246                 goto err_setup_tx;
4247         err = i40e_vsi_setup_rx_resources(vsi);
4248         if (err)
4249                 goto err_setup_rx;
4250
4251         err = i40e_vsi_configure(vsi);
4252         if (err)
4253                 goto err_setup_rx;
4254
4255         snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
4256                  dev_driver_string(&pf->pdev->dev), netdev->name);
4257         err = i40e_vsi_request_irq(vsi, int_name);
4258         if (err)
4259                 goto err_setup_rx;
4260
4261         /* Notify the stack of the actual queue counts. */
4262         err = netif_set_real_num_tx_queues(netdev, vsi->num_queue_pairs);
4263         if (err)
4264                 goto err_set_queues;
4265
4266         err = netif_set_real_num_rx_queues(netdev, vsi->num_queue_pairs);
4267         if (err)
4268                 goto err_set_queues;
4269
4270         err = i40e_up_complete(vsi);
4271         if (err)
4272                 goto err_up_complete;
4273
4274 #ifdef CONFIG_I40E_VXLAN
4275         vxlan_get_rx_port(netdev);
4276 #endif
4277
4278         return 0;
4279
4280 err_up_complete:
4281         i40e_down(vsi);
4282 err_set_queues:
4283         i40e_vsi_free_irq(vsi);
4284 err_setup_rx:
4285         i40e_vsi_free_rx_resources(vsi);
4286 err_setup_tx:
4287         i40e_vsi_free_tx_resources(vsi);
4288         if (vsi == pf->vsi[pf->lan_vsi])
4289                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
4290
4291         return err;
4292 }
4293
4294 /**
4295  * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
4296  * @pf: Pointer to pf
4297  *
4298  * This function destroys the hlist where all the Flow Director
4299  * filters were saved.
4300  **/
4301 static void i40e_fdir_filter_exit(struct i40e_pf *pf)
4302 {
4303         struct i40e_fdir_filter *filter;
4304         struct hlist_node *node2;
4305
4306         hlist_for_each_entry_safe(filter, node2,
4307                                   &pf->fdir_filter_list, fdir_node) {
4308                 hlist_del(&filter->fdir_node);
4309                 kfree(filter);
4310         }
4311         pf->fdir_pf_active_filters = 0;
4312 }
4313
4314 /**
4315  * i40e_close - Disables a network interface
4316  * @netdev: network interface device structure
4317  *
4318  * The close entry point is called when an interface is de-activated
4319  * by the OS.  The hardware is still under the driver's control, but
4320  * this netdev interface is disabled.
4321  *
4322  * Returns 0, this is not allowed to fail
4323  **/
4324 static int i40e_close(struct net_device *netdev)
4325 {
4326         struct i40e_netdev_priv *np = netdev_priv(netdev);
4327         struct i40e_vsi *vsi = np->vsi;
4328
4329         if (test_and_set_bit(__I40E_DOWN, &vsi->state))
4330                 return 0;
4331
4332         i40e_down(vsi);
4333         i40e_vsi_free_irq(vsi);
4334
4335         i40e_vsi_free_tx_resources(vsi);
4336         i40e_vsi_free_rx_resources(vsi);
4337
4338         return 0;
4339 }
4340
4341 /**
4342  * i40e_do_reset - Start a PF or Core Reset sequence
4343  * @pf: board private structure
4344  * @reset_flags: which reset is requested
4345  *
4346  * The essential difference in resets is that the PF Reset
4347  * doesn't clear the packet buffers, doesn't reset the PE
4348  * firmware, and doesn't bother the other PFs on the chip.
4349  **/
4350 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
4351 {
4352         u32 val;
4353
4354         WARN_ON(in_interrupt());
4355
4356         /* do the biggest reset indicated */
4357         if (reset_flags & (1 << __I40E_GLOBAL_RESET_REQUESTED)) {
4358
4359                 /* Request a Global Reset
4360                  *
4361                  * This will start the chip's countdown to the actual full
4362                  * chip reset event, and a warning interrupt to be sent
4363                  * to all PFs, including the requestor.  Our handler
4364                  * for the warning interrupt will deal with the shutdown
4365                  * and recovery of the switch setup.
4366                  */
4367                 dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
4368                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4369                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
4370                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4371
4372         } else if (reset_flags & (1 << __I40E_CORE_RESET_REQUESTED)) {
4373
4374                 /* Request a Core Reset
4375                  *
4376                  * Same as Global Reset, except does *not* include the MAC/PHY
4377                  */
4378                 dev_dbg(&pf->pdev->dev, "CoreR requested\n");
4379                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4380                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
4381                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4382                 i40e_flush(&pf->hw);
4383
4384         } else if (reset_flags & (1 << __I40E_EMP_RESET_REQUESTED)) {
4385
4386                 /* Request a Firmware Reset
4387                  *
4388                  * Same as Global reset, plus restarting the
4389                  * embedded firmware engine.
4390                  */
4391                 /* enable EMP Reset */
4392                 val = rd32(&pf->hw, I40E_GLGEN_RSTENA_EMP);
4393                 val |= I40E_GLGEN_RSTENA_EMP_EMP_RST_ENA_MASK;
4394                 wr32(&pf->hw, I40E_GLGEN_RSTENA_EMP, val);
4395
4396                 /* force the reset */
4397                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4398                 val |= I40E_GLGEN_RTRIG_EMPFWR_MASK;
4399                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4400                 i40e_flush(&pf->hw);
4401
4402         } else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {
4403
4404                 /* Request a PF Reset
4405                  *
4406                  * Resets only the PF-specific registers
4407                  *
4408                  * This goes directly to the tear-down and rebuild of
4409                  * the switch, since we need to do all the recovery as
4410                  * for the Core Reset.
4411                  */
4412                 dev_dbg(&pf->pdev->dev, "PFR requested\n");
4413                 i40e_handle_reset_warning(pf);
4414
4415         } else if (reset_flags & (1 << __I40E_REINIT_REQUESTED)) {
4416                 int v;
4417
4418                 /* Find the VSI(s) that requested a re-init */
4419                 dev_info(&pf->pdev->dev,
4420                          "VSI reinit requested\n");
4421                 for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4422                         struct i40e_vsi *vsi = pf->vsi[v];
4423                         if (vsi != NULL &&
4424                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
4425                                 i40e_vsi_reinit_locked(pf->vsi[v]);
4426                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
4427                         }
4428                 }
4429
4430                 /* no further action needed, so return now */
4431                 return;
4432         } else {
4433                 dev_info(&pf->pdev->dev,
4434                          "bad reset request 0x%08x\n", reset_flags);
4435                 return;
4436         }
4437 }
4438
4439 #ifdef CONFIG_I40E_DCB
4440 /**
4441  * i40e_dcb_need_reconfig - Check if DCB needs reconfig
4442  * @pf: board private structure
4443  * @old_cfg: current DCB config
4444  * @new_cfg: new DCB config
4445  **/
4446 bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
4447                             struct i40e_dcbx_config *old_cfg,
4448                             struct i40e_dcbx_config *new_cfg)
4449 {
4450         bool need_reconfig = false;
4451
4452         /* Check if ETS configuration has changed */
4453         if (memcmp(&new_cfg->etscfg,
4454                    &old_cfg->etscfg,
4455                    sizeof(new_cfg->etscfg))) {
4456                 /* If Priority Table has changed reconfig is needed */
4457                 if (memcmp(&new_cfg->etscfg.prioritytable,
4458                            &old_cfg->etscfg.prioritytable,
4459                            sizeof(new_cfg->etscfg.prioritytable))) {
4460                         need_reconfig = true;
4461                         dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
4462                 }
4463
4464                 if (memcmp(&new_cfg->etscfg.tcbwtable,
4465                            &old_cfg->etscfg.tcbwtable,
4466                            sizeof(new_cfg->etscfg.tcbwtable)))
4467                         dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");
4468
4469                 if (memcmp(&new_cfg->etscfg.tsatable,
4470                            &old_cfg->etscfg.tsatable,
4471                            sizeof(new_cfg->etscfg.tsatable)))
4472                         dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
4473         }
4474
4475         /* Check if PFC configuration has changed */
4476         if (memcmp(&new_cfg->pfc,
4477                    &old_cfg->pfc,
4478                    sizeof(new_cfg->pfc))) {
4479                 need_reconfig = true;
4480                 dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
4481         }
4482
4483         /* Check if APP Table has changed */
4484         if (memcmp(&new_cfg->app,
4485                    &old_cfg->app,
4486                    sizeof(new_cfg->app))) {
4487                 need_reconfig = true;
4488                 dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
4489         }
4490
4491         return need_reconfig;
4492 }
4493
4494 /**
4495  * i40e_handle_lldp_event - Handle LLDP Change MIB event
4496  * @pf: board private structure
4497  * @e: event info posted on ARQ
4498  **/
4499 static int i40e_handle_lldp_event(struct i40e_pf *pf,
4500                                   struct i40e_arq_event_info *e)
4501 {
4502         struct i40e_aqc_lldp_get_mib *mib =
4503                 (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
4504         struct i40e_hw *hw = &pf->hw;
4505         struct i40e_dcbx_config *dcbx_cfg = &hw->local_dcbx_config;
4506         struct i40e_dcbx_config tmp_dcbx_cfg;
4507         bool need_reconfig = false;
4508         int ret = 0;
4509         u8 type;
4510
4511         /* Ignore if event is not for Nearest Bridge */
4512         type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
4513                 & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
4514         if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
4515                 return ret;
4516
4517         /* Check MIB Type and return if event for Remote MIB update */
4518         type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
4519         if (type == I40E_AQ_LLDP_MIB_REMOTE) {
4520                 /* Update the remote cached instance and return */
4521                 ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
4522                                 I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
4523                                 &hw->remote_dcbx_config);
4524                 goto exit;
4525         }
4526
4527         /* Convert/store the DCBX data from LLDPDU temporarily */
4528         memset(&tmp_dcbx_cfg, 0, sizeof(tmp_dcbx_cfg));
4529         ret = i40e_lldp_to_dcb_config(e->msg_buf, &tmp_dcbx_cfg);
4530         if (ret) {
4531                 /* Error in LLDPDU parsing return */
4532                 dev_info(&pf->pdev->dev, "Failed parsing LLDPDU from event buffer\n");
4533                 goto exit;
4534         }
4535
4536         /* No change detected in DCBX configs */
4537         if (!memcmp(&tmp_dcbx_cfg, dcbx_cfg, sizeof(tmp_dcbx_cfg))) {
4538                 dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
4539                 goto exit;
4540         }
4541
4542         need_reconfig = i40e_dcb_need_reconfig(pf, dcbx_cfg, &tmp_dcbx_cfg);
4543
4544         i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg);
4545
4546         /* Overwrite the new configuration */
4547         *dcbx_cfg = tmp_dcbx_cfg;
4548
4549         if (!need_reconfig)
4550                 goto exit;
4551
4552         /* Reconfiguration needed quiesce all VSIs */
4553         i40e_pf_quiesce_all_vsi(pf);
4554
4555         /* Changes in configuration update VEB/VSI */
4556         i40e_dcb_reconfigure(pf);
4557
4558         i40e_pf_unquiesce_all_vsi(pf);
4559 exit:
4560         return ret;
4561 }
4562 #endif /* CONFIG_I40E_DCB */
4563
4564 /**
4565  * i40e_do_reset_safe - Protected reset path for userland calls.
4566  * @pf: board private structure
4567  * @reset_flags: which reset is requested
4568  *
4569  **/
4570 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
4571 {
4572         rtnl_lock();
4573         i40e_do_reset(pf, reset_flags);
4574         rtnl_unlock();
4575 }
4576
4577 /**
4578  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
4579  * @pf: board private structure
4580  * @e: event info posted on ARQ
4581  *
4582  * Handler for LAN Queue Overflow Event generated by the firmware for PF
4583  * and VF queues
4584  **/
4585 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
4586                                            struct i40e_arq_event_info *e)
4587 {
4588         struct i40e_aqc_lan_overflow *data =
4589                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
4590         u32 queue = le32_to_cpu(data->prtdcb_rupto);
4591         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
4592         struct i40e_hw *hw = &pf->hw;
4593         struct i40e_vf *vf;
4594         u16 vf_id;
4595
4596         dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
4597                 queue, qtx_ctl);
4598
4599         /* Queue belongs to VF, find the VF and issue VF reset */
4600         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
4601             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
4602                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
4603                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
4604                 vf_id -= hw->func_caps.vf_base_id;
4605                 vf = &pf->vf[vf_id];
4606                 i40e_vc_notify_vf_reset(vf);
4607                 /* Allow VF to process pending reset notification */
4608                 msleep(20);
4609                 i40e_reset_vf(vf, false);
4610         }
4611 }
4612
4613 /**
4614  * i40e_service_event_complete - Finish up the service event
4615  * @pf: board private structure
4616  **/
4617 static void i40e_service_event_complete(struct i40e_pf *pf)
4618 {
4619         BUG_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
4620
4621         /* flush memory to make sure state is correct before next watchog */
4622         smp_mb__before_clear_bit();
4623         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
4624 }
4625
4626 /**
4627  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
4628  * @pf: board private structure
4629  **/
4630 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
4631 {
4632         if (!(pf->flags & I40E_FLAG_FDIR_REQUIRES_REINIT))
4633                 return;
4634
4635         pf->flags &= ~I40E_FLAG_FDIR_REQUIRES_REINIT;
4636
4637         /* if interface is down do nothing */
4638         if (test_bit(__I40E_DOWN, &pf->state))
4639                 return;
4640 }
4641
4642 /**
4643  * i40e_vsi_link_event - notify VSI of a link event
4644  * @vsi: vsi to be notified
4645  * @link_up: link up or down
4646  **/
4647 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
4648 {
4649         if (!vsi)
4650                 return;
4651
4652         switch (vsi->type) {
4653         case I40E_VSI_MAIN:
4654                 if (!vsi->netdev || !vsi->netdev_registered)
4655                         break;
4656
4657                 if (link_up) {
4658                         netif_carrier_on(vsi->netdev);
4659                         netif_tx_wake_all_queues(vsi->netdev);
4660                 } else {
4661                         netif_carrier_off(vsi->netdev);
4662                         netif_tx_stop_all_queues(vsi->netdev);
4663                 }
4664                 break;
4665
4666         case I40E_VSI_SRIOV:
4667                 break;
4668
4669         case I40E_VSI_VMDQ2:
4670         case I40E_VSI_CTRL:
4671         case I40E_VSI_MIRROR:
4672         default:
4673                 /* there is no notification for other VSIs */
4674                 break;
4675         }
4676 }
4677
4678 /**
4679  * i40e_veb_link_event - notify elements on the veb of a link event
4680  * @veb: veb to be notified
4681  * @link_up: link up or down
4682  **/
4683 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
4684 {
4685         struct i40e_pf *pf;
4686         int i;
4687
4688         if (!veb || !veb->pf)
4689                 return;
4690         pf = veb->pf;
4691
4692         /* depth first... */
4693         for (i = 0; i < I40E_MAX_VEB; i++)
4694                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
4695                         i40e_veb_link_event(pf->veb[i], link_up);
4696
4697         /* ... now the local VSIs */
4698         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4699                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
4700                         i40e_vsi_link_event(pf->vsi[i], link_up);
4701 }
4702
4703 /**
4704  * i40e_link_event - Update netif_carrier status
4705  * @pf: board private structure
4706  **/
4707 static void i40e_link_event(struct i40e_pf *pf)
4708 {
4709         bool new_link, old_link;
4710
4711         new_link = (pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP);
4712         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
4713
4714         if (new_link == old_link)
4715                 return;
4716
4717         if (!test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
4718                 netdev_info(pf->vsi[pf->lan_vsi]->netdev,
4719                             "NIC Link is %s\n", (new_link ? "Up" : "Down"));
4720
4721         /* Notify the base of the switch tree connected to
4722          * the link.  Floating VEBs are not notified.
4723          */
4724         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
4725                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
4726         else
4727                 i40e_vsi_link_event(pf->vsi[pf->lan_vsi], new_link);
4728
4729         if (pf->vf)
4730                 i40e_vc_notify_link_state(pf);
4731
4732         if (pf->flags & I40E_FLAG_PTP)
4733                 i40e_ptp_set_increment(pf);
4734 }
4735
4736 /**
4737  * i40e_check_hang_subtask - Check for hung queues and dropped interrupts
4738  * @pf: board private structure
4739  *
4740  * Set the per-queue flags to request a check for stuck queues in the irq
4741  * clean functions, then force interrupts to be sure the irq clean is called.
4742  **/
4743 static void i40e_check_hang_subtask(struct i40e_pf *pf)
4744 {
4745         int i, v;
4746
4747         /* If we're down or resetting, just bail */
4748         if (test_bit(__I40E_CONFIG_BUSY, &pf->state))
4749                 return;
4750
4751         /* for each VSI/netdev
4752          *     for each Tx queue
4753          *         set the check flag
4754          *     for each q_vector
4755          *         force an interrupt
4756          */
4757         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4758                 struct i40e_vsi *vsi = pf->vsi[v];
4759                 int armed = 0;
4760
4761                 if (!pf->vsi[v] ||
4762                     test_bit(__I40E_DOWN, &vsi->state) ||
4763                     (vsi->netdev && !netif_carrier_ok(vsi->netdev)))
4764                         continue;
4765
4766                 for (i = 0; i < vsi->num_queue_pairs; i++) {
4767                         set_check_for_tx_hang(vsi->tx_rings[i]);
4768                         if (test_bit(__I40E_HANG_CHECK_ARMED,
4769                                      &vsi->tx_rings[i]->state))
4770                                 armed++;
4771                 }
4772
4773                 if (armed) {
4774                         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
4775                                 wr32(&vsi->back->hw, I40E_PFINT_DYN_CTL0,
4776                                      (I40E_PFINT_DYN_CTL0_INTENA_MASK |
4777                                       I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
4778                         } else {
4779                                 u16 vec = vsi->base_vector - 1;
4780                                 u32 val = (I40E_PFINT_DYN_CTLN_INTENA_MASK |
4781                                            I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK);
4782                                 for (i = 0; i < vsi->num_q_vectors; i++, vec++)
4783                                         wr32(&vsi->back->hw,
4784                                              I40E_PFINT_DYN_CTLN(vec), val);
4785                         }
4786                         i40e_flush(&vsi->back->hw);
4787                 }
4788         }
4789 }
4790
4791 /**
4792  * i40e_watchdog_subtask - Check and bring link up
4793  * @pf: board private structure
4794  **/
4795 static void i40e_watchdog_subtask(struct i40e_pf *pf)
4796 {
4797         int i;
4798
4799         /* if interface is down do nothing */
4800         if (test_bit(__I40E_DOWN, &pf->state) ||
4801             test_bit(__I40E_CONFIG_BUSY, &pf->state))
4802                 return;
4803
4804         /* Update the stats for active netdevs so the network stack
4805          * can look at updated numbers whenever it cares to
4806          */
4807         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4808                 if (pf->vsi[i] && pf->vsi[i]->netdev)
4809                         i40e_update_stats(pf->vsi[i]);
4810
4811         /* Update the stats for the active switching components */
4812         for (i = 0; i < I40E_MAX_VEB; i++)
4813                 if (pf->veb[i])
4814                         i40e_update_veb_stats(pf->veb[i]);
4815
4816         i40e_ptp_rx_hang(pf->vsi[pf->lan_vsi]);
4817 }
4818
4819 /**
4820  * i40e_reset_subtask - Set up for resetting the device and driver
4821  * @pf: board private structure
4822  **/
4823 static void i40e_reset_subtask(struct i40e_pf *pf)
4824 {
4825         u32 reset_flags = 0;
4826
4827         rtnl_lock();
4828         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
4829                 reset_flags |= (1 << __I40E_REINIT_REQUESTED);
4830                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
4831         }
4832         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
4833                 reset_flags |= (1 << __I40E_PF_RESET_REQUESTED);
4834                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4835         }
4836         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
4837                 reset_flags |= (1 << __I40E_CORE_RESET_REQUESTED);
4838                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
4839         }
4840         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
4841                 reset_flags |= (1 << __I40E_GLOBAL_RESET_REQUESTED);
4842                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
4843         }
4844
4845         /* If there's a recovery already waiting, it takes
4846          * precedence before starting a new reset sequence.
4847          */
4848         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
4849                 i40e_handle_reset_warning(pf);
4850                 goto unlock;
4851         }
4852
4853         /* If we're already down or resetting, just bail */
4854         if (reset_flags &&
4855             !test_bit(__I40E_DOWN, &pf->state) &&
4856             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
4857                 i40e_do_reset(pf, reset_flags);
4858
4859 unlock:
4860         rtnl_unlock();
4861 }
4862
4863 /**
4864  * i40e_handle_link_event - Handle link event
4865  * @pf: board private structure
4866  * @e: event info posted on ARQ
4867  **/
4868 static void i40e_handle_link_event(struct i40e_pf *pf,
4869                                    struct i40e_arq_event_info *e)
4870 {
4871         struct i40e_hw *hw = &pf->hw;
4872         struct i40e_aqc_get_link_status *status =
4873                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
4874         struct i40e_link_status *hw_link_info = &hw->phy.link_info;
4875
4876         /* save off old link status information */
4877         memcpy(&pf->hw.phy.link_info_old, hw_link_info,
4878                sizeof(pf->hw.phy.link_info_old));
4879
4880         /* update link status */
4881         hw_link_info->phy_type = (enum i40e_aq_phy_type)status->phy_type;
4882         hw_link_info->link_speed = (enum i40e_aq_link_speed)status->link_speed;
4883         hw_link_info->link_info = status->link_info;
4884         hw_link_info->an_info = status->an_info;
4885         hw_link_info->ext_info = status->ext_info;
4886         hw_link_info->lse_enable =
4887                 le16_to_cpu(status->command_flags) &
4888                             I40E_AQ_LSE_ENABLE;
4889
4890         /* process the event */
4891         i40e_link_event(pf);
4892
4893         /* Do a new status request to re-enable LSE reporting
4894          * and load new status information into the hw struct,
4895          * then see if the status changed while processing the
4896          * initial event.
4897          */
4898         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
4899         i40e_link_event(pf);
4900 }
4901
4902 /**
4903  * i40e_clean_adminq_subtask - Clean the AdminQ rings
4904  * @pf: board private structure
4905  **/
4906 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
4907 {
4908         struct i40e_arq_event_info event;
4909         struct i40e_hw *hw = &pf->hw;
4910         u16 pending, i = 0;
4911         i40e_status ret;
4912         u16 opcode;
4913         u32 val;
4914
4915         if (!test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state))
4916                 return;
4917
4918         event.msg_size = I40E_MAX_AQ_BUF_SIZE;
4919         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
4920         if (!event.msg_buf)
4921                 return;
4922
4923         do {
4924                 event.msg_size = I40E_MAX_AQ_BUF_SIZE; /* reinit each time */
4925                 ret = i40e_clean_arq_element(hw, &event, &pending);
4926                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
4927                         dev_info(&pf->pdev->dev, "No ARQ event found\n");
4928                         break;
4929                 } else if (ret) {
4930                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
4931                         break;
4932                 }
4933
4934                 opcode = le16_to_cpu(event.desc.opcode);
4935                 switch (opcode) {
4936
4937                 case i40e_aqc_opc_get_link_status:
4938                         i40e_handle_link_event(pf, &event);
4939                         break;
4940                 case i40e_aqc_opc_send_msg_to_pf:
4941                         ret = i40e_vc_process_vf_msg(pf,
4942                                         le16_to_cpu(event.desc.retval),
4943                                         le32_to_cpu(event.desc.cookie_high),
4944                                         le32_to_cpu(event.desc.cookie_low),
4945                                         event.msg_buf,
4946                                         event.msg_size);
4947                         break;
4948                 case i40e_aqc_opc_lldp_update_mib:
4949                         dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
4950 #ifdef CONFIG_I40E_DCB
4951                         rtnl_lock();
4952                         ret = i40e_handle_lldp_event(pf, &event);
4953                         rtnl_unlock();
4954 #endif /* CONFIG_I40E_DCB */
4955                         break;
4956                 case i40e_aqc_opc_event_lan_overflow:
4957                         dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
4958                         i40e_handle_lan_overflow_event(pf, &event);
4959                         break;
4960                 case i40e_aqc_opc_send_msg_to_peer:
4961                         dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
4962                         break;
4963                 default:
4964                         dev_info(&pf->pdev->dev,
4965                                  "ARQ Error: Unknown event 0x%04x received\n",
4966                                  opcode);
4967                         break;
4968                 }
4969         } while (pending && (i++ < pf->adminq_work_limit));
4970
4971         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
4972         /* re-enable Admin queue interrupt cause */
4973         val = rd32(hw, I40E_PFINT_ICR0_ENA);
4974         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
4975         wr32(hw, I40E_PFINT_ICR0_ENA, val);
4976         i40e_flush(hw);
4977
4978         kfree(event.msg_buf);
4979 }
4980
4981 /**
4982  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
4983  * @veb: pointer to the VEB instance
4984  *
4985  * This is a recursive function that first builds the attached VSIs then
4986  * recurses in to build the next layer of VEB.  We track the connections
4987  * through our own index numbers because the seid's from the HW could
4988  * change across the reset.
4989  **/
4990 static int i40e_reconstitute_veb(struct i40e_veb *veb)
4991 {
4992         struct i40e_vsi *ctl_vsi = NULL;
4993         struct i40e_pf *pf = veb->pf;
4994         int v, veb_idx;
4995         int ret;
4996
4997         /* build VSI that owns this VEB, temporarily attached to base VEB */
4998         for (v = 0; v < pf->hw.func_caps.num_vsis && !ctl_vsi; v++) {
4999                 if (pf->vsi[v] &&
5000                     pf->vsi[v]->veb_idx == veb->idx &&
5001                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
5002                         ctl_vsi = pf->vsi[v];
5003                         break;
5004                 }
5005         }
5006         if (!ctl_vsi) {
5007                 dev_info(&pf->pdev->dev,
5008                          "missing owner VSI for veb_idx %d\n", veb->idx);
5009                 ret = -ENOENT;
5010                 goto end_reconstitute;
5011         }
5012         if (ctl_vsi != pf->vsi[pf->lan_vsi])
5013                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
5014         ret = i40e_add_vsi(ctl_vsi);
5015         if (ret) {
5016                 dev_info(&pf->pdev->dev,
5017                          "rebuild of owner VSI failed: %d\n", ret);
5018                 goto end_reconstitute;
5019         }
5020         i40e_vsi_reset_stats(ctl_vsi);
5021
5022         /* create the VEB in the switch and move the VSI onto the VEB */
5023         ret = i40e_add_veb(veb, ctl_vsi);
5024         if (ret)
5025                 goto end_reconstitute;
5026
5027         /* create the remaining VSIs attached to this VEB */
5028         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
5029                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
5030                         continue;
5031
5032                 if (pf->vsi[v]->veb_idx == veb->idx) {
5033                         struct i40e_vsi *vsi = pf->vsi[v];
5034                         vsi->uplink_seid = veb->seid;
5035                         ret = i40e_add_vsi(vsi);
5036                         if (ret) {
5037                                 dev_info(&pf->pdev->dev,
5038                                          "rebuild of vsi_idx %d failed: %d\n",
5039                                          v, ret);
5040                                 goto end_reconstitute;
5041                         }
5042                         i40e_vsi_reset_stats(vsi);
5043                 }
5044         }
5045
5046         /* create any VEBs attached to this VEB - RECURSION */
5047         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
5048                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
5049                         pf->veb[veb_idx]->uplink_seid = veb->seid;
5050                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
5051                         if (ret)
5052                                 break;
5053                 }
5054         }
5055
5056 end_reconstitute:
5057         return ret;
5058 }
5059
5060 /**
5061  * i40e_get_capabilities - get info about the HW
5062  * @pf: the PF struct
5063  **/
5064 static int i40e_get_capabilities(struct i40e_pf *pf)
5065 {
5066         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
5067         u16 data_size;
5068         int buf_len;
5069         int err;
5070
5071         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
5072         do {
5073                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
5074                 if (!cap_buf)
5075                         return -ENOMEM;
5076
5077                 /* this loads the data into the hw struct for us */
5078                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
5079                                             &data_size,
5080                                             i40e_aqc_opc_list_func_capabilities,
5081                                             NULL);
5082                 /* data loaded, buffer no longer needed */
5083                 kfree(cap_buf);
5084
5085                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
5086                         /* retry with a larger buffer */
5087                         buf_len = data_size;
5088                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
5089                         dev_info(&pf->pdev->dev,
5090                                  "capability discovery failed: aq=%d\n",
5091                                  pf->hw.aq.asq_last_status);
5092                         return -ENODEV;
5093                 }
5094         } while (err);
5095
5096         /* increment MSI-X count because current FW skips one */
5097         pf->hw.func_caps.num_msix_vectors++;
5098
5099         if (((pf->hw.aq.fw_maj_ver == 2) && (pf->hw.aq.fw_min_ver < 22)) ||
5100             (pf->hw.aq.fw_maj_ver < 2)) {
5101                 pf->hw.func_caps.num_msix_vectors++;
5102                 pf->hw.func_caps.num_msix_vectors_vf++;
5103         }
5104
5105         if (pf->hw.debug_mask & I40E_DEBUG_USER)
5106                 dev_info(&pf->pdev->dev,
5107                          "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",
5108                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
5109                          pf->hw.func_caps.num_msix_vectors,
5110                          pf->hw.func_caps.num_msix_vectors_vf,
5111                          pf->hw.func_caps.fd_filters_guaranteed,
5112                          pf->hw.func_caps.fd_filters_best_effort,
5113                          pf->hw.func_caps.num_tx_qp,
5114                          pf->hw.func_caps.num_vsis);
5115
5116 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
5117                        + pf->hw.func_caps.num_vfs)
5118         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
5119                 dev_info(&pf->pdev->dev,
5120                          "got num_vsis %d, setting num_vsis to %d\n",
5121                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
5122                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
5123         }
5124
5125         return 0;
5126 }
5127
5128 static int i40e_vsi_clear(struct i40e_vsi *vsi);
5129
5130 /**
5131  * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
5132  * @pf: board private structure
5133  **/
5134 static void i40e_fdir_sb_setup(struct i40e_pf *pf)
5135 {
5136         struct i40e_vsi *vsi;
5137         bool new_vsi = false;
5138         int err, i;
5139
5140         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
5141                 return;
5142
5143         /* find existing VSI and see if it needs configuring */
5144         vsi = NULL;
5145         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
5146                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
5147                         vsi = pf->vsi[i];
5148                         break;
5149                 }
5150         }
5151
5152         /* create a new VSI if none exists */
5153         if (!vsi) {
5154                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR,
5155                                      pf->vsi[pf->lan_vsi]->seid, 0);
5156                 if (!vsi) {
5157                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
5158                         goto err_vsi;
5159                 }
5160                 new_vsi = true;
5161         }
5162         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
5163
5164         err = i40e_vsi_setup_tx_resources(vsi);
5165         if (err)
5166                 goto err_setup_tx;
5167         err = i40e_vsi_setup_rx_resources(vsi);
5168         if (err)
5169                 goto err_setup_rx;
5170
5171         if (new_vsi) {
5172                 char int_name[IFNAMSIZ + 9];
5173                 err = i40e_vsi_configure(vsi);
5174                 if (err)
5175                         goto err_setup_rx;
5176                 snprintf(int_name, sizeof(int_name) - 1, "%s-fdir",
5177                          dev_driver_string(&pf->pdev->dev));
5178                 err = i40e_vsi_request_irq(vsi, int_name);
5179                 if (err)
5180                         goto err_setup_rx;
5181                 err = i40e_up_complete(vsi);
5182                 if (err)
5183                         goto err_up_complete;
5184                 clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
5185         }
5186
5187         return;
5188
5189 err_up_complete:
5190         i40e_down(vsi);
5191         i40e_vsi_free_irq(vsi);
5192 err_setup_rx:
5193         i40e_vsi_free_rx_resources(vsi);
5194 err_setup_tx:
5195         i40e_vsi_free_tx_resources(vsi);
5196 err_vsi:
5197         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
5198         i40e_vsi_clear(vsi);
5199 }
5200
5201 /**
5202  * i40e_fdir_teardown - release the Flow Director resources
5203  * @pf: board private structure
5204  **/
5205 static void i40e_fdir_teardown(struct i40e_pf *pf)
5206 {
5207         int i;
5208
5209         i40e_fdir_filter_exit(pf);
5210         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
5211                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
5212                         i40e_vsi_release(pf->vsi[i]);
5213                         break;
5214                 }
5215         }
5216 }
5217
5218 /**
5219  * i40e_prep_for_reset - prep for the core to reset
5220  * @pf: board private structure
5221  *
5222  * Close up the VFs and other things in prep for pf Reset.
5223   **/
5224 static int i40e_prep_for_reset(struct i40e_pf *pf)
5225 {
5226         struct i40e_hw *hw = &pf->hw;
5227         i40e_status ret;
5228         u32 v;
5229
5230         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
5231         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
5232                 return 0;
5233
5234         dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");
5235
5236         if (i40e_check_asq_alive(hw))
5237                 i40e_vc_notify_reset(pf);
5238
5239         /* quiesce the VSIs and their queues that are not already DOWN */
5240         i40e_pf_quiesce_all_vsi(pf);
5241
5242         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
5243                 if (pf->vsi[v])
5244                         pf->vsi[v]->seid = 0;
5245         }
5246
5247         i40e_shutdown_adminq(&pf->hw);
5248
5249         /* call shutdown HMC */
5250         ret = i40e_shutdown_lan_hmc(hw);
5251         if (ret) {
5252                 dev_info(&pf->pdev->dev, "shutdown_lan_hmc failed: %d\n", ret);
5253                 clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
5254         }
5255         return ret;
5256 }
5257
5258 /**
5259  * i40e_reset_and_rebuild - reset and rebuild using a saved config
5260  * @pf: board private structure
5261  * @reinit: if the Main VSI needs to re-initialized.
5262  **/
5263 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
5264 {
5265         struct i40e_driver_version dv;
5266         struct i40e_hw *hw = &pf->hw;
5267         i40e_status ret;
5268         u32 v;
5269
5270         /* Now we wait for GRST to settle out.
5271          * We don't have to delete the VEBs or VSIs from the hw switch
5272          * because the reset will make them disappear.
5273          */
5274         ret = i40e_pf_reset(hw);
5275         if (ret)
5276                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
5277         pf->pfr_count++;
5278
5279         if (test_bit(__I40E_DOWN, &pf->state))
5280                 goto end_core_reset;
5281         dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
5282
5283         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
5284         ret = i40e_init_adminq(&pf->hw);
5285         if (ret) {
5286                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, %d\n", ret);
5287                 goto end_core_reset;
5288         }
5289
5290         ret = i40e_get_capabilities(pf);
5291         if (ret) {
5292                 dev_info(&pf->pdev->dev, "i40e_get_capabilities failed, %d\n",
5293                          ret);
5294                 goto end_core_reset;
5295         }
5296
5297         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
5298                                 hw->func_caps.num_rx_qp,
5299                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
5300         if (ret) {
5301                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
5302                 goto end_core_reset;
5303         }
5304         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
5305         if (ret) {
5306                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
5307                 goto end_core_reset;
5308         }
5309
5310 #ifdef CONFIG_I40E_DCB
5311         ret = i40e_init_pf_dcb(pf);
5312         if (ret) {
5313                 dev_info(&pf->pdev->dev, "init_pf_dcb failed: %d\n", ret);
5314                 goto end_core_reset;
5315         }
5316 #endif /* CONFIG_I40E_DCB */
5317
5318         /* do basic switch setup */
5319         ret = i40e_setup_pf_switch(pf, reinit);
5320         if (ret)
5321                 goto end_core_reset;
5322
5323         /* Rebuild the VSIs and VEBs that existed before reset.
5324          * They are still in our local switch element arrays, so only
5325          * need to rebuild the switch model in the HW.
5326          *
5327          * If there were VEBs but the reconstitution failed, we'll try
5328          * try to recover minimal use by getting the basic PF VSI working.
5329          */
5330         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
5331                 dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");
5332                 /* find the one VEB connected to the MAC, and find orphans */
5333                 for (v = 0; v < I40E_MAX_VEB; v++) {
5334                         if (!pf->veb[v])
5335                                 continue;
5336
5337                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
5338                             pf->veb[v]->uplink_seid == 0) {
5339                                 ret = i40e_reconstitute_veb(pf->veb[v]);
5340
5341                                 if (!ret)
5342                                         continue;
5343
5344                                 /* If Main VEB failed, we're in deep doodoo,
5345                                  * so give up rebuilding the switch and set up
5346                                  * for minimal rebuild of PF VSI.
5347                                  * If orphan failed, we'll report the error
5348                                  * but try to keep going.
5349                                  */
5350                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
5351                                         dev_info(&pf->pdev->dev,
5352                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
5353                                                  ret);
5354                                         pf->vsi[pf->lan_vsi]->uplink_seid
5355                                                                 = pf->mac_seid;
5356                                         break;
5357                                 } else if (pf->veb[v]->uplink_seid == 0) {
5358                                         dev_info(&pf->pdev->dev,
5359                                                  "rebuild of orphan VEB failed: %d\n",
5360                                                  ret);
5361                                 }
5362                         }
5363                 }
5364         }
5365
5366         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
5367                 dev_info(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
5368                 /* no VEB, so rebuild only the Main VSI */
5369                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
5370                 if (ret) {
5371                         dev_info(&pf->pdev->dev,
5372                                  "rebuild of Main VSI failed: %d\n", ret);
5373                         goto end_core_reset;
5374                 }
5375         }
5376
5377         /* reinit the misc interrupt */
5378         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5379                 ret = i40e_setup_misc_vector(pf);
5380
5381         /* restart the VSIs that were rebuilt and running before the reset */
5382         i40e_pf_unquiesce_all_vsi(pf);
5383
5384         if (pf->num_alloc_vfs) {
5385                 for (v = 0; v < pf->num_alloc_vfs; v++)
5386                         i40e_reset_vf(&pf->vf[v], true);
5387         }
5388
5389         /* tell the firmware that we're starting */
5390         dv.major_version = DRV_VERSION_MAJOR;
5391         dv.minor_version = DRV_VERSION_MINOR;
5392         dv.build_version = DRV_VERSION_BUILD;
5393         dv.subbuild_version = 0;
5394         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
5395
5396         dev_info(&pf->pdev->dev, "reset complete\n");
5397
5398 end_core_reset:
5399         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
5400 }
5401
5402 /**
5403  * i40e_handle_reset_warning - prep for the pf to reset, reset and rebuild
5404  * @pf: board private structure
5405  *
5406  * Close up the VFs and other things in prep for a Core Reset,
5407  * then get ready to rebuild the world.
5408  **/
5409 static void i40e_handle_reset_warning(struct i40e_pf *pf)
5410 {
5411         i40e_status ret;
5412
5413         ret = i40e_prep_for_reset(pf);
5414         if (!ret)
5415                 i40e_reset_and_rebuild(pf, false);
5416 }
5417
5418 /**
5419  * i40e_handle_mdd_event
5420  * @pf: pointer to the pf structure
5421  *
5422  * Called from the MDD irq handler to identify possibly malicious vfs
5423  **/
5424 static void i40e_handle_mdd_event(struct i40e_pf *pf)
5425 {
5426         struct i40e_hw *hw = &pf->hw;
5427         bool mdd_detected = false;
5428         struct i40e_vf *vf;
5429         u32 reg;
5430         int i;
5431
5432         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
5433                 return;
5434
5435         /* find what triggered the MDD event */
5436         reg = rd32(hw, I40E_GL_MDET_TX);
5437         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
5438                 u8 func = (reg & I40E_GL_MDET_TX_FUNCTION_MASK)
5439                                 >> I40E_GL_MDET_TX_FUNCTION_SHIFT;
5440                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_SHIFT)
5441                                 >> I40E_GL_MDET_TX_EVENT_SHIFT;
5442                 u8 queue = (reg & I40E_GL_MDET_TX_QUEUE_MASK)
5443                                 >> I40E_GL_MDET_TX_QUEUE_SHIFT;
5444                 dev_info(&pf->pdev->dev,
5445                          "Malicious Driver Detection event 0x%02x on TX queue %d of function 0x%02x\n",
5446                          event, queue, func);
5447                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
5448                 mdd_detected = true;
5449         }
5450         reg = rd32(hw, I40E_GL_MDET_RX);
5451         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
5452                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK)
5453                                 >> I40E_GL_MDET_RX_FUNCTION_SHIFT;
5454                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_SHIFT)
5455                                 >> I40E_GL_MDET_RX_EVENT_SHIFT;
5456                 u8 queue = (reg & I40E_GL_MDET_RX_QUEUE_MASK)
5457                                 >> I40E_GL_MDET_RX_QUEUE_SHIFT;
5458                 dev_info(&pf->pdev->dev,
5459                          "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
5460                          event, queue, func);
5461                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
5462                 mdd_detected = true;
5463         }
5464
5465         /* see if one of the VFs needs its hand slapped */
5466         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
5467                 vf = &(pf->vf[i]);
5468                 reg = rd32(hw, I40E_VP_MDET_TX(i));
5469                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
5470                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
5471                         vf->num_mdd_events++;
5472                         dev_info(&pf->pdev->dev, "MDD TX event on VF %d\n", i);
5473                 }
5474
5475                 reg = rd32(hw, I40E_VP_MDET_RX(i));
5476                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
5477                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
5478                         vf->num_mdd_events++;
5479                         dev_info(&pf->pdev->dev, "MDD RX event on VF %d\n", i);
5480                 }
5481
5482                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
5483                         dev_info(&pf->pdev->dev,
5484                                  "Too many MDD events on VF %d, disabled\n", i);
5485                         dev_info(&pf->pdev->dev,
5486                                  "Use PF Control I/F to re-enable the VF\n");
5487                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
5488                 }
5489         }
5490
5491         /* re-enable mdd interrupt cause */
5492         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
5493         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
5494         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
5495         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
5496         i40e_flush(hw);
5497 }
5498
5499 #ifdef CONFIG_I40E_VXLAN
5500 /**
5501  * i40e_sync_vxlan_filters_subtask - Sync the VSI filter list with HW
5502  * @pf: board private structure
5503  **/
5504 static void i40e_sync_vxlan_filters_subtask(struct i40e_pf *pf)
5505 {
5506         const int vxlan_hdr_qwords = 4;
5507         struct i40e_hw *hw = &pf->hw;
5508         i40e_status ret;
5509         u8 filter_index;
5510         __be16 port;
5511         int i;
5512
5513         if (!(pf->flags & I40E_FLAG_VXLAN_FILTER_SYNC))
5514                 return;
5515
5516         pf->flags &= ~I40E_FLAG_VXLAN_FILTER_SYNC;
5517
5518         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
5519                 if (pf->pending_vxlan_bitmap & (1 << i)) {
5520                         pf->pending_vxlan_bitmap &= ~(1 << i);
5521                         port = pf->vxlan_ports[i];
5522                         ret = port ?
5523                               i40e_aq_add_udp_tunnel(hw, ntohs(port),
5524                                                      vxlan_hdr_qwords,
5525                                                      I40E_AQC_TUNNEL_TYPE_VXLAN,
5526                                                      &filter_index, NULL)
5527                               : i40e_aq_del_udp_tunnel(hw, i, NULL);
5528
5529                         if (ret) {
5530                                 dev_info(&pf->pdev->dev, "Failed to execute AQ command for %s port %d with index %d\n",
5531                                          port ? "adding" : "deleting",
5532                                          ntohs(port), port ? i : i);
5533
5534                                 pf->vxlan_ports[i] = 0;
5535                         } else {
5536                                 dev_info(&pf->pdev->dev, "%s port %d with AQ command with index %d\n",
5537                                          port ? "Added" : "Deleted",
5538                                          ntohs(port), port ? i : filter_index);
5539                         }
5540                 }
5541         }
5542 }
5543
5544 #endif
5545 /**
5546  * i40e_service_task - Run the driver's async subtasks
5547  * @work: pointer to work_struct containing our data
5548  **/
5549 static void i40e_service_task(struct work_struct *work)
5550 {
5551         struct i40e_pf *pf = container_of(work,
5552                                           struct i40e_pf,
5553                                           service_task);
5554         unsigned long start_time = jiffies;
5555
5556         i40e_reset_subtask(pf);
5557         i40e_handle_mdd_event(pf);
5558         i40e_vc_process_vflr_event(pf);
5559         i40e_watchdog_subtask(pf);
5560         i40e_fdir_reinit_subtask(pf);
5561         i40e_check_hang_subtask(pf);
5562         i40e_sync_filters_subtask(pf);
5563 #ifdef CONFIG_I40E_VXLAN
5564         i40e_sync_vxlan_filters_subtask(pf);
5565 #endif
5566         i40e_clean_adminq_subtask(pf);
5567
5568         i40e_service_event_complete(pf);
5569
5570         /* If the tasks have taken longer than one timer cycle or there
5571          * is more work to be done, reschedule the service task now
5572          * rather than wait for the timer to tick again.
5573          */
5574         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
5575             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
5576             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
5577             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
5578                 i40e_service_event_schedule(pf);
5579 }
5580
5581 /**
5582  * i40e_service_timer - timer callback
5583  * @data: pointer to PF struct
5584  **/
5585 static void i40e_service_timer(unsigned long data)
5586 {
5587         struct i40e_pf *pf = (struct i40e_pf *)data;
5588
5589         mod_timer(&pf->service_timer,
5590                   round_jiffies(jiffies + pf->service_timer_period));
5591         i40e_service_event_schedule(pf);
5592 }
5593
5594 /**
5595  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
5596  * @vsi: the VSI being configured
5597  **/
5598 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
5599 {
5600         struct i40e_pf *pf = vsi->back;
5601
5602         switch (vsi->type) {
5603         case I40E_VSI_MAIN:
5604                 vsi->alloc_queue_pairs = pf->num_lan_qps;
5605                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5606                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5607                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5608                         vsi->num_q_vectors = pf->num_lan_msix;
5609                 else
5610                         vsi->num_q_vectors = 1;
5611
5612                 break;
5613
5614         case I40E_VSI_FDIR:
5615                 vsi->alloc_queue_pairs = 1;
5616                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
5617                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5618                 vsi->num_q_vectors = 1;
5619                 break;
5620
5621         case I40E_VSI_VMDQ2:
5622                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
5623                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5624                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5625                 vsi->num_q_vectors = pf->num_vmdq_msix;
5626                 break;
5627
5628         case I40E_VSI_SRIOV:
5629                 vsi->alloc_queue_pairs = pf->num_vf_qps;
5630                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5631                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5632                 break;
5633
5634         default:
5635                 WARN_ON(1);
5636                 return -ENODATA;
5637         }
5638
5639         return 0;
5640 }
5641
5642 /**
5643  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
5644  * @type: VSI pointer
5645  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
5646  *
5647  * On error: returns error code (negative)
5648  * On success: returns 0
5649  **/
5650 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
5651 {
5652         int size;
5653         int ret = 0;
5654
5655         /* allocate memory for both Tx and Rx ring pointers */
5656         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
5657         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
5658         if (!vsi->tx_rings)
5659                 return -ENOMEM;
5660         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
5661
5662         if (alloc_qvectors) {
5663                 /* allocate memory for q_vector pointers */
5664                 size = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
5665                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
5666                 if (!vsi->q_vectors) {
5667                         ret = -ENOMEM;
5668                         goto err_vectors;
5669                 }
5670         }
5671         return ret;
5672
5673 err_vectors:
5674         kfree(vsi->tx_rings);
5675         return ret;
5676 }
5677
5678 /**
5679  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
5680  * @pf: board private structure
5681  * @type: type of VSI
5682  *
5683  * On error: returns error code (negative)
5684  * On success: returns vsi index in PF (positive)
5685  **/
5686 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
5687 {
5688         int ret = -ENODEV;
5689         struct i40e_vsi *vsi;
5690         int vsi_idx;
5691         int i;
5692
5693         /* Need to protect the allocation of the VSIs at the PF level */
5694         mutex_lock(&pf->switch_mutex);
5695
5696         /* VSI list may be fragmented if VSI creation/destruction has
5697          * been happening.  We can afford to do a quick scan to look
5698          * for any free VSIs in the list.
5699          *
5700          * find next empty vsi slot, looping back around if necessary
5701          */
5702         i = pf->next_vsi;
5703         while (i < pf->hw.func_caps.num_vsis && pf->vsi[i])
5704                 i++;
5705         if (i >= pf->hw.func_caps.num_vsis) {
5706                 i = 0;
5707                 while (i < pf->next_vsi && pf->vsi[i])
5708                         i++;
5709         }
5710
5711         if (i < pf->hw.func_caps.num_vsis && !pf->vsi[i]) {
5712                 vsi_idx = i;             /* Found one! */
5713         } else {
5714                 ret = -ENODEV;
5715                 goto unlock_pf;  /* out of VSI slots! */
5716         }
5717         pf->next_vsi = ++i;
5718
5719         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
5720         if (!vsi) {
5721                 ret = -ENOMEM;
5722                 goto unlock_pf;
5723         }
5724         vsi->type = type;
5725         vsi->back = pf;
5726         set_bit(__I40E_DOWN, &vsi->state);
5727         vsi->flags = 0;
5728         vsi->idx = vsi_idx;
5729         vsi->rx_itr_setting = pf->rx_itr_default;
5730         vsi->tx_itr_setting = pf->tx_itr_default;
5731         vsi->netdev_registered = false;
5732         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
5733         INIT_LIST_HEAD(&vsi->mac_filter_list);
5734
5735         ret = i40e_set_num_rings_in_vsi(vsi);
5736         if (ret)
5737                 goto err_rings;
5738
5739         ret = i40e_vsi_alloc_arrays(vsi, true);
5740         if (ret)
5741                 goto err_rings;
5742
5743         /* Setup default MSIX irq handler for VSI */
5744         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
5745
5746         pf->vsi[vsi_idx] = vsi;
5747         ret = vsi_idx;
5748         goto unlock_pf;
5749
5750 err_rings:
5751         pf->next_vsi = i - 1;
5752         kfree(vsi);
5753 unlock_pf:
5754         mutex_unlock(&pf->switch_mutex);
5755         return ret;
5756 }
5757
5758 /**
5759  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
5760  * @type: VSI pointer
5761  * @free_qvectors: a bool to specify if q_vectors need to be freed.
5762  *
5763  * On error: returns error code (negative)
5764  * On success: returns 0
5765  **/
5766 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
5767 {
5768         /* free the ring and vector containers */
5769         if (free_qvectors) {
5770                 kfree(vsi->q_vectors);
5771                 vsi->q_vectors = NULL;
5772         }
5773         kfree(vsi->tx_rings);
5774         vsi->tx_rings = NULL;
5775         vsi->rx_rings = NULL;
5776 }
5777
5778 /**
5779  * i40e_vsi_clear - Deallocate the VSI provided
5780  * @vsi: the VSI being un-configured
5781  **/
5782 static int i40e_vsi_clear(struct i40e_vsi *vsi)
5783 {
5784         struct i40e_pf *pf;
5785
5786         if (!vsi)
5787                 return 0;
5788
5789         if (!vsi->back)
5790                 goto free_vsi;
5791         pf = vsi->back;
5792
5793         mutex_lock(&pf->switch_mutex);
5794         if (!pf->vsi[vsi->idx]) {
5795                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
5796                         vsi->idx, vsi->idx, vsi, vsi->type);
5797                 goto unlock_vsi;
5798         }
5799
5800         if (pf->vsi[vsi->idx] != vsi) {
5801                 dev_err(&pf->pdev->dev,
5802                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
5803                         pf->vsi[vsi->idx]->idx,
5804                         pf->vsi[vsi->idx],
5805                         pf->vsi[vsi->idx]->type,
5806                         vsi->idx, vsi, vsi->type);
5807                 goto unlock_vsi;
5808         }
5809
5810         /* updates the pf for this cleared vsi */
5811         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
5812         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
5813
5814         i40e_vsi_free_arrays(vsi, true);
5815
5816         pf->vsi[vsi->idx] = NULL;
5817         if (vsi->idx < pf->next_vsi)
5818                 pf->next_vsi = vsi->idx;
5819
5820 unlock_vsi:
5821         mutex_unlock(&pf->switch_mutex);
5822 free_vsi:
5823         kfree(vsi);
5824
5825         return 0;
5826 }
5827
5828 /**
5829  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
5830  * @vsi: the VSI being cleaned
5831  **/
5832 static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
5833 {
5834         int i;
5835
5836         if (vsi->tx_rings && vsi->tx_rings[0]) {
5837                 for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5838                         kfree_rcu(vsi->tx_rings[i], rcu);
5839                         vsi->tx_rings[i] = NULL;
5840                         vsi->rx_rings[i] = NULL;
5841                 }
5842         }
5843 }
5844
5845 /**
5846  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
5847  * @vsi: the VSI being configured
5848  **/
5849 static int i40e_alloc_rings(struct i40e_vsi *vsi)
5850 {
5851         struct i40e_pf *pf = vsi->back;
5852         int i;
5853
5854         /* Set basic values in the rings to be used later during open() */
5855         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5856                 struct i40e_ring *tx_ring;
5857                 struct i40e_ring *rx_ring;
5858
5859                 /* allocate space for both Tx and Rx in one shot */
5860                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
5861                 if (!tx_ring)
5862                         goto err_out;
5863
5864                 tx_ring->queue_index = i;
5865                 tx_ring->reg_idx = vsi->base_queue + i;
5866                 tx_ring->ring_active = false;
5867                 tx_ring->vsi = vsi;
5868                 tx_ring->netdev = vsi->netdev;
5869                 tx_ring->dev = &pf->pdev->dev;
5870                 tx_ring->count = vsi->num_desc;
5871                 tx_ring->size = 0;
5872                 tx_ring->dcb_tc = 0;
5873                 vsi->tx_rings[i] = tx_ring;
5874
5875                 rx_ring = &tx_ring[1];
5876                 rx_ring->queue_index = i;
5877                 rx_ring->reg_idx = vsi->base_queue + i;
5878                 rx_ring->ring_active = false;
5879                 rx_ring->vsi = vsi;
5880                 rx_ring->netdev = vsi->netdev;
5881                 rx_ring->dev = &pf->pdev->dev;
5882                 rx_ring->count = vsi->num_desc;
5883                 rx_ring->size = 0;
5884                 rx_ring->dcb_tc = 0;
5885                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
5886                         set_ring_16byte_desc_enabled(rx_ring);
5887                 else
5888                         clear_ring_16byte_desc_enabled(rx_ring);
5889                 vsi->rx_rings[i] = rx_ring;
5890         }
5891
5892         return 0;
5893
5894 err_out:
5895         i40e_vsi_clear_rings(vsi);
5896         return -ENOMEM;
5897 }
5898
5899 /**
5900  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
5901  * @pf: board private structure
5902  * @vectors: the number of MSI-X vectors to request
5903  *
5904  * Returns the number of vectors reserved, or error
5905  **/
5906 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
5907 {
5908         vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
5909                                         I40E_MIN_MSIX, vectors);
5910         if (vectors < 0) {
5911                 dev_info(&pf->pdev->dev,
5912                          "MSI-X vector reservation failed: %d\n", vectors);
5913                 vectors = 0;
5914         }
5915
5916         pf->num_msix_entries = vectors;
5917
5918         return vectors;
5919 }
5920
5921 /**
5922  * i40e_init_msix - Setup the MSIX capability
5923  * @pf: board private structure
5924  *
5925  * Work with the OS to set up the MSIX vectors needed.
5926  *
5927  * Returns 0 on success, negative on failure
5928  **/
5929 static int i40e_init_msix(struct i40e_pf *pf)
5930 {
5931         i40e_status err = 0;
5932         struct i40e_hw *hw = &pf->hw;
5933         int v_budget, i;
5934         int vec;
5935
5936         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
5937                 return -ENODEV;
5938
5939         /* The number of vectors we'll request will be comprised of:
5940          *   - Add 1 for "other" cause for Admin Queue events, etc.
5941          *   - The number of LAN queue pairs
5942          *      - Queues being used for RSS.
5943          *              We don't need as many as max_rss_size vectors.
5944          *              use rss_size instead in the calculation since that
5945          *              is governed by number of cpus in the system.
5946          *      - assumes symmetric Tx/Rx pairing
5947          *   - The number of VMDq pairs
5948          * Once we count this up, try the request.
5949          *
5950          * If we can't get what we want, we'll simplify to nearly nothing
5951          * and try again.  If that still fails, we punt.
5952          */
5953         pf->num_lan_msix = pf->num_lan_qps - (pf->rss_size_max - pf->rss_size);
5954         pf->num_vmdq_msix = pf->num_vmdq_qps;
5955         v_budget = 1 + pf->num_lan_msix;
5956         v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
5957         if (pf->flags & I40E_FLAG_FD_SB_ENABLED)
5958                 v_budget++;
5959
5960         /* Scale down if necessary, and the rings will share vectors */
5961         v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
5962
5963         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
5964                                    GFP_KERNEL);
5965         if (!pf->msix_entries)
5966                 return -ENOMEM;
5967
5968         for (i = 0; i < v_budget; i++)
5969                 pf->msix_entries[i].entry = i;
5970         vec = i40e_reserve_msix_vectors(pf, v_budget);
5971         if (vec < I40E_MIN_MSIX) {
5972                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
5973                 kfree(pf->msix_entries);
5974                 pf->msix_entries = NULL;
5975                 return -ENODEV;
5976
5977         } else if (vec == I40E_MIN_MSIX) {
5978                 /* Adjust for minimal MSIX use */
5979                 dev_info(&pf->pdev->dev, "Features disabled, not enough MSI-X vectors\n");
5980                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
5981                 pf->num_vmdq_vsis = 0;
5982                 pf->num_vmdq_qps = 0;
5983                 pf->num_vmdq_msix = 0;
5984                 pf->num_lan_qps = 1;
5985                 pf->num_lan_msix = 1;
5986
5987         } else if (vec != v_budget) {
5988                 /* Scale vector usage down */
5989                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
5990                 vec--;                    /* reserve the misc vector */
5991
5992                 /* partition out the remaining vectors */
5993                 switch (vec) {
5994                 case 2:
5995                         pf->num_vmdq_vsis = 1;
5996                         pf->num_lan_msix = 1;
5997                         break;
5998                 case 3:
5999                         pf->num_vmdq_vsis = 1;
6000                         pf->num_lan_msix = 2;
6001                         break;
6002                 default:
6003                         pf->num_lan_msix = min_t(int, (vec / 2),
6004                                                  pf->num_lan_qps);
6005                         pf->num_vmdq_vsis = min_t(int, (vec - pf->num_lan_msix),
6006                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
6007                         break;
6008                 }
6009         }
6010
6011         return err;
6012 }
6013
6014 /**
6015  * i40e_alloc_q_vector - Allocate memory for a single interrupt vector
6016  * @vsi: the VSI being configured
6017  * @v_idx: index of the vector in the vsi struct
6018  *
6019  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
6020  **/
6021 static int i40e_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
6022 {
6023         struct i40e_q_vector *q_vector;
6024
6025         /* allocate q_vector */
6026         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
6027         if (!q_vector)
6028                 return -ENOMEM;
6029
6030         q_vector->vsi = vsi;
6031         q_vector->v_idx = v_idx;
6032         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
6033         if (vsi->netdev)
6034                 netif_napi_add(vsi->netdev, &q_vector->napi,
6035                                i40e_napi_poll, vsi->work_limit);
6036
6037         q_vector->rx.latency_range = I40E_LOW_LATENCY;
6038         q_vector->tx.latency_range = I40E_LOW_LATENCY;
6039
6040         /* tie q_vector and vsi together */
6041         vsi->q_vectors[v_idx] = q_vector;
6042
6043         return 0;
6044 }
6045
6046 /**
6047  * i40e_alloc_q_vectors - Allocate memory for interrupt vectors
6048  * @vsi: the VSI being configured
6049  *
6050  * We allocate one q_vector per queue interrupt.  If allocation fails we
6051  * return -ENOMEM.
6052  **/
6053 static int i40e_alloc_q_vectors(struct i40e_vsi *vsi)
6054 {
6055         struct i40e_pf *pf = vsi->back;
6056         int v_idx, num_q_vectors;
6057         int err;
6058
6059         /* if not MSIX, give the one vector only to the LAN VSI */
6060         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
6061                 num_q_vectors = vsi->num_q_vectors;
6062         else if (vsi == pf->vsi[pf->lan_vsi])
6063                 num_q_vectors = 1;
6064         else
6065                 return -EINVAL;
6066
6067         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
6068                 err = i40e_alloc_q_vector(vsi, v_idx);
6069                 if (err)
6070                         goto err_out;
6071         }
6072
6073         return 0;
6074
6075 err_out:
6076         while (v_idx--)
6077                 i40e_free_q_vector(vsi, v_idx);
6078
6079         return err;
6080 }
6081
6082 /**
6083  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
6084  * @pf: board private structure to initialize
6085  **/
6086 static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
6087 {
6088         int err = 0;
6089
6090         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
6091                 err = i40e_init_msix(pf);
6092                 if (err) {
6093                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED   |
6094                                        I40E_FLAG_RSS_ENABLED    |
6095                                        I40E_FLAG_DCB_ENABLED    |
6096                                        I40E_FLAG_SRIOV_ENABLED  |
6097                                        I40E_FLAG_FD_SB_ENABLED  |
6098                                        I40E_FLAG_FD_ATR_ENABLED |
6099                                        I40E_FLAG_VMDQ_ENABLED);
6100
6101                         /* rework the queue expectations without MSIX */
6102                         i40e_determine_queue_usage(pf);
6103                 }
6104         }
6105
6106         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
6107             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
6108                 dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
6109                 err = pci_enable_msi(pf->pdev);
6110                 if (err) {
6111                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n", err);
6112                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
6113                 }
6114         }
6115
6116         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
6117                 dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");
6118
6119         /* track first vector for misc interrupts */
6120         err = i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT-1);
6121 }
6122
6123 /**
6124  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
6125  * @pf: board private structure
6126  *
6127  * This sets up the handler for MSIX 0, which is used to manage the
6128  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
6129  * when in MSI or Legacy interrupt mode.
6130  **/
6131 static int i40e_setup_misc_vector(struct i40e_pf *pf)
6132 {
6133         struct i40e_hw *hw = &pf->hw;
6134         int err = 0;
6135
6136         /* Only request the irq if this is the first time through, and
6137          * not when we're rebuilding after a Reset
6138          */
6139         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
6140                 err = request_irq(pf->msix_entries[0].vector,
6141                                   i40e_intr, 0, pf->misc_int_name, pf);
6142                 if (err) {
6143                         dev_info(&pf->pdev->dev,
6144                                  "request_irq for %s failed: %d\n",
6145                                  pf->misc_int_name, err);
6146                         return -EFAULT;
6147                 }
6148         }
6149
6150         i40e_enable_misc_int_causes(hw);
6151
6152         /* associate no queues to the misc vector */
6153         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
6154         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
6155
6156         i40e_flush(hw);
6157
6158         i40e_irq_dynamic_enable_icr0(pf);
6159
6160         return err;
6161 }
6162
6163 /**
6164  * i40e_config_rss - Prepare for RSS if used
6165  * @pf: board private structure
6166  **/
6167 static int i40e_config_rss(struct i40e_pf *pf)
6168 {
6169         /* Set of random keys generated using kernel random number generator */
6170         static const u32 seed[I40E_PFQF_HKEY_MAX_INDEX + 1] = {0x41b01687,
6171                                 0x183cfd8c, 0xce880440, 0x580cbc3c, 0x35897377,
6172                                 0x328b25e1, 0x4fa98922, 0xb7d90c14, 0xd5bad70d,
6173                                 0xcd15a2c1, 0xe8580225, 0x4a1e9d11, 0xfe5731be};
6174         struct i40e_hw *hw = &pf->hw;
6175         u32 lut = 0;
6176         int i, j;
6177         u64 hena;
6178
6179         /* Fill out hash function seed */
6180         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
6181                 wr32(hw, I40E_PFQF_HKEY(i), seed[i]);
6182
6183         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
6184         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
6185                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
6186         hena |= I40E_DEFAULT_RSS_HENA;
6187         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
6188         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
6189
6190         /* Populate the LUT with max no. of queues in round robin fashion */
6191         for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
6192
6193                 /* The assumption is that lan qp count will be the highest
6194                  * qp count for any PF VSI that needs RSS.
6195                  * If multiple VSIs need RSS support, all the qp counts
6196                  * for those VSIs should be a power of 2 for RSS to work.
6197                  * If LAN VSI is the only consumer for RSS then this requirement
6198                  * is not necessary.
6199                  */
6200                 if (j == pf->rss_size)
6201                         j = 0;
6202                 /* lut = 4-byte sliding window of 4 lut entries */
6203                 lut = (lut << 8) | (j &
6204                          ((0x1 << pf->hw.func_caps.rss_table_entry_width) - 1));
6205                 /* On i = 3, we have 4 entries in lut; write to the register */
6206                 if ((i & 3) == 3)
6207                         wr32(hw, I40E_PFQF_HLUT(i >> 2), lut);
6208         }
6209         i40e_flush(hw);
6210
6211         return 0;
6212 }
6213
6214 /**
6215  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
6216  * @pf: board private structure
6217  * @queue_count: the requested queue count for rss.
6218  *
6219  * returns 0 if rss is not enabled, if enabled returns the final rss queue
6220  * count which may be different from the requested queue count.
6221  **/
6222 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
6223 {
6224         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
6225                 return 0;
6226
6227         queue_count = min_t(int, queue_count, pf->rss_size_max);
6228         queue_count = rounddown_pow_of_two(queue_count);
6229
6230         if (queue_count != pf->rss_size) {
6231                 i40e_prep_for_reset(pf);
6232
6233                 pf->rss_size = queue_count;
6234
6235                 i40e_reset_and_rebuild(pf, true);
6236                 i40e_config_rss(pf);
6237         }
6238         dev_info(&pf->pdev->dev, "RSS count:  %d\n", pf->rss_size);
6239         return pf->rss_size;
6240 }
6241
6242 /**
6243  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
6244  * @pf: board private structure to initialize
6245  *
6246  * i40e_sw_init initializes the Adapter private data structure.
6247  * Fields are initialized based on PCI device information and
6248  * OS network device settings (MTU size).
6249  **/
6250 static int i40e_sw_init(struct i40e_pf *pf)
6251 {
6252         int err = 0;
6253         int size;
6254
6255         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
6256                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
6257         pf->hw.debug_mask = pf->msg_enable | I40E_DEBUG_DIAG;
6258         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
6259                 if (I40E_DEBUG_USER & debug)
6260                         pf->hw.debug_mask = debug;
6261                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
6262                                                 I40E_DEFAULT_MSG_ENABLE);
6263         }
6264
6265         /* Set default capability flags */
6266         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
6267                     I40E_FLAG_MSI_ENABLED     |
6268                     I40E_FLAG_MSIX_ENABLED    |
6269                     I40E_FLAG_RX_1BUF_ENABLED;
6270
6271         /* Depending on PF configurations, it is possible that the RSS
6272          * maximum might end up larger than the available queues
6273          */
6274         pf->rss_size_max = 0x1 << pf->hw.func_caps.rss_table_entry_width;
6275         pf->rss_size_max = min_t(int, pf->rss_size_max,
6276                                  pf->hw.func_caps.num_tx_qp);
6277         if (pf->hw.func_caps.rss) {
6278                 pf->flags |= I40E_FLAG_RSS_ENABLED;
6279                 pf->rss_size = min_t(int, pf->rss_size_max, num_online_cpus());
6280                 pf->rss_size = rounddown_pow_of_two(pf->rss_size);
6281         } else {
6282                 pf->rss_size = 1;
6283         }
6284
6285         /* MFP mode enabled */
6286         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.mfp_mode_1) {
6287                 pf->flags |= I40E_FLAG_MFP_ENABLED;
6288                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
6289         }
6290
6291         /* FW/NVM is not yet fixed in this regard */
6292         if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
6293             (pf->hw.func_caps.fd_filters_best_effort > 0)) {
6294                 pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
6295                 pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
6296                 if (!(pf->flags & I40E_FLAG_MFP_ENABLED)) {
6297                         pf->flags |= I40E_FLAG_FD_SB_ENABLED;
6298                 } else {
6299                         dev_info(&pf->pdev->dev,
6300                                  "Flow Director Side Band mode Disabled in MFP mode\n");
6301                 }
6302                 pf->fdir_pf_filter_count =
6303                                  pf->hw.func_caps.fd_filters_guaranteed;
6304                 pf->hw.fdir_shared_filter_count =
6305                                  pf->hw.func_caps.fd_filters_best_effort;
6306         }
6307
6308         if (pf->hw.func_caps.vmdq) {
6309                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
6310                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
6311                 pf->num_vmdq_qps = I40E_DEFAULT_QUEUES_PER_VMDQ;
6312         }
6313
6314 #ifdef CONFIG_PCI_IOV
6315         if (pf->hw.func_caps.num_vfs) {
6316                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
6317                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
6318                 pf->num_req_vfs = min_t(int,
6319                                         pf->hw.func_caps.num_vfs,
6320                                         I40E_MAX_VF_COUNT);
6321         }
6322 #endif /* CONFIG_PCI_IOV */
6323         pf->eeprom_version = 0xDEAD;
6324         pf->lan_veb = I40E_NO_VEB;
6325         pf->lan_vsi = I40E_NO_VSI;
6326
6327         /* set up queue assignment tracking */
6328         size = sizeof(struct i40e_lump_tracking)
6329                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
6330         pf->qp_pile = kzalloc(size, GFP_KERNEL);
6331         if (!pf->qp_pile) {
6332                 err = -ENOMEM;
6333                 goto sw_init_done;
6334         }
6335         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
6336         pf->qp_pile->search_hint = 0;
6337
6338         /* set up vector assignment tracking */
6339         size = sizeof(struct i40e_lump_tracking)
6340                 + (sizeof(u16) * pf->hw.func_caps.num_msix_vectors);
6341         pf->irq_pile = kzalloc(size, GFP_KERNEL);
6342         if (!pf->irq_pile) {
6343                 kfree(pf->qp_pile);
6344                 err = -ENOMEM;
6345                 goto sw_init_done;
6346         }
6347         pf->irq_pile->num_entries = pf->hw.func_caps.num_msix_vectors;
6348         pf->irq_pile->search_hint = 0;
6349
6350         mutex_init(&pf->switch_mutex);
6351
6352 sw_init_done:
6353         return err;
6354 }
6355
6356 /**
6357  * i40e_set_features - set the netdev feature flags
6358  * @netdev: ptr to the netdev being adjusted
6359  * @features: the feature set that the stack is suggesting
6360  **/
6361 static int i40e_set_features(struct net_device *netdev,
6362                              netdev_features_t features)
6363 {
6364         struct i40e_netdev_priv *np = netdev_priv(netdev);
6365         struct i40e_vsi *vsi = np->vsi;
6366
6367         if (features & NETIF_F_HW_VLAN_CTAG_RX)
6368                 i40e_vlan_stripping_enable(vsi);
6369         else
6370                 i40e_vlan_stripping_disable(vsi);
6371
6372         return 0;
6373 }
6374
6375 #ifdef CONFIG_I40E_VXLAN
6376 /**
6377  * i40e_get_vxlan_port_idx - Lookup a possibly offloaded for Rx UDP port
6378  * @pf: board private structure
6379  * @port: The UDP port to look up
6380  *
6381  * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
6382  **/
6383 static u8 i40e_get_vxlan_port_idx(struct i40e_pf *pf, __be16 port)
6384 {
6385         u8 i;
6386
6387         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
6388                 if (pf->vxlan_ports[i] == port)
6389                         return i;
6390         }
6391
6392         return i;
6393 }
6394
6395 /**
6396  * i40e_add_vxlan_port - Get notifications about VXLAN ports that come up
6397  * @netdev: This physical port's netdev
6398  * @sa_family: Socket Family that VXLAN is notifying us about
6399  * @port: New UDP port number that VXLAN started listening to
6400  **/
6401 static void i40e_add_vxlan_port(struct net_device *netdev,
6402                                 sa_family_t sa_family, __be16 port)
6403 {
6404         struct i40e_netdev_priv *np = netdev_priv(netdev);
6405         struct i40e_vsi *vsi = np->vsi;
6406         struct i40e_pf *pf = vsi->back;
6407         u8 next_idx;
6408         u8 idx;
6409
6410         if (sa_family == AF_INET6)
6411                 return;
6412
6413         idx = i40e_get_vxlan_port_idx(pf, port);
6414
6415         /* Check if port already exists */
6416         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6417                 netdev_info(netdev, "Port %d already offloaded\n", ntohs(port));
6418                 return;
6419         }
6420
6421         /* Now check if there is space to add the new port */
6422         next_idx = i40e_get_vxlan_port_idx(pf, 0);
6423
6424         if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6425                 netdev_info(netdev, "Maximum number of UDP ports reached, not adding port %d\n",
6426                             ntohs(port));
6427                 return;
6428         }
6429
6430         /* New port: add it and mark its index in the bitmap */
6431         pf->vxlan_ports[next_idx] = port;
6432         pf->pending_vxlan_bitmap |= (1 << next_idx);
6433
6434         pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
6435 }
6436
6437 /**
6438  * i40e_del_vxlan_port - Get notifications about VXLAN ports that go away
6439  * @netdev: This physical port's netdev
6440  * @sa_family: Socket Family that VXLAN is notifying us about
6441  * @port: UDP port number that VXLAN stopped listening to
6442  **/
6443 static void i40e_del_vxlan_port(struct net_device *netdev,
6444                                 sa_family_t sa_family, __be16 port)
6445 {
6446         struct i40e_netdev_priv *np = netdev_priv(netdev);
6447         struct i40e_vsi *vsi = np->vsi;
6448         struct i40e_pf *pf = vsi->back;
6449         u8 idx;
6450
6451         if (sa_family == AF_INET6)
6452                 return;
6453
6454         idx = i40e_get_vxlan_port_idx(pf, port);
6455
6456         /* Check if port already exists */
6457         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6458                 /* if port exists, set it to 0 (mark for deletion)
6459                  * and make it pending
6460                  */
6461                 pf->vxlan_ports[idx] = 0;
6462
6463                 pf->pending_vxlan_bitmap |= (1 << idx);
6464
6465                 pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
6466         } else {
6467                 netdev_warn(netdev, "Port %d was not found, not deleting\n",
6468                             ntohs(port));
6469         }
6470 }
6471
6472 #endif
6473 static const struct net_device_ops i40e_netdev_ops = {
6474         .ndo_open               = i40e_open,
6475         .ndo_stop               = i40e_close,
6476         .ndo_start_xmit         = i40e_lan_xmit_frame,
6477         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
6478         .ndo_set_rx_mode        = i40e_set_rx_mode,
6479         .ndo_validate_addr      = eth_validate_addr,
6480         .ndo_set_mac_address    = i40e_set_mac,
6481         .ndo_change_mtu         = i40e_change_mtu,
6482         .ndo_do_ioctl           = i40e_ioctl,
6483         .ndo_tx_timeout         = i40e_tx_timeout,
6484         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
6485         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
6486 #ifdef CONFIG_NET_POLL_CONTROLLER
6487         .ndo_poll_controller    = i40e_netpoll,
6488 #endif
6489         .ndo_setup_tc           = i40e_setup_tc,
6490         .ndo_set_features       = i40e_set_features,
6491         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
6492         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
6493         .ndo_set_vf_tx_rate     = i40e_ndo_set_vf_bw,
6494         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
6495 #ifdef CONFIG_I40E_VXLAN
6496         .ndo_add_vxlan_port     = i40e_add_vxlan_port,
6497         .ndo_del_vxlan_port     = i40e_del_vxlan_port,
6498 #endif
6499 };
6500
6501 /**
6502  * i40e_config_netdev - Setup the netdev flags
6503  * @vsi: the VSI being configured
6504  *
6505  * Returns 0 on success, negative value on failure
6506  **/
6507 static int i40e_config_netdev(struct i40e_vsi *vsi)
6508 {
6509         u8 brdcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
6510         struct i40e_pf *pf = vsi->back;
6511         struct i40e_hw *hw = &pf->hw;
6512         struct i40e_netdev_priv *np;
6513         struct net_device *netdev;
6514         u8 mac_addr[ETH_ALEN];
6515         int etherdev_size;
6516
6517         etherdev_size = sizeof(struct i40e_netdev_priv);
6518         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
6519         if (!netdev)
6520                 return -ENOMEM;
6521
6522         vsi->netdev = netdev;
6523         np = netdev_priv(netdev);
6524         np->vsi = vsi;
6525
6526         netdev->hw_enc_features = NETIF_F_IP_CSUM        |
6527                                   NETIF_F_GSO_UDP_TUNNEL |
6528                                   NETIF_F_TSO            |
6529                                   NETIF_F_SG;
6530
6531         netdev->features = NETIF_F_SG                  |
6532                            NETIF_F_IP_CSUM             |
6533                            NETIF_F_SCTP_CSUM           |
6534                            NETIF_F_HIGHDMA             |
6535                            NETIF_F_GSO_UDP_TUNNEL      |
6536                            NETIF_F_HW_VLAN_CTAG_TX     |
6537                            NETIF_F_HW_VLAN_CTAG_RX     |
6538                            NETIF_F_HW_VLAN_CTAG_FILTER |
6539                            NETIF_F_IPV6_CSUM           |
6540                            NETIF_F_TSO                 |
6541                            NETIF_F_TSO6                |
6542                            NETIF_F_RXCSUM              |
6543                            NETIF_F_RXHASH              |
6544                            0;
6545
6546         /* copy netdev features into list of user selectable features */
6547         netdev->hw_features |= netdev->features;
6548
6549         if (vsi->type == I40E_VSI_MAIN) {
6550                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
6551                 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN);
6552         } else {
6553                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
6554                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
6555                          pf->vsi[pf->lan_vsi]->netdev->name);
6556                 random_ether_addr(mac_addr);
6557                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
6558         }
6559         i40e_add_filter(vsi, brdcast, I40E_VLAN_ANY, false, false);
6560
6561         memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
6562         memcpy(netdev->perm_addr, mac_addr, ETH_ALEN);
6563         /* vlan gets same features (except vlan offload)
6564          * after any tweaks for specific VSI types
6565          */
6566         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
6567                                                      NETIF_F_HW_VLAN_CTAG_RX |
6568                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
6569         netdev->priv_flags |= IFF_UNICAST_FLT;
6570         netdev->priv_flags |= IFF_SUPP_NOFCS;
6571         /* Setup netdev TC information */
6572         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
6573
6574         netdev->netdev_ops = &i40e_netdev_ops;
6575         netdev->watchdog_timeo = 5 * HZ;
6576         i40e_set_ethtool_ops(netdev);
6577
6578         return 0;
6579 }
6580
6581 /**
6582  * i40e_vsi_delete - Delete a VSI from the switch
6583  * @vsi: the VSI being removed
6584  *
6585  * Returns 0 on success, negative value on failure
6586  **/
6587 static void i40e_vsi_delete(struct i40e_vsi *vsi)
6588 {
6589         /* remove default VSI is not allowed */
6590         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
6591                 return;
6592
6593         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
6594         return;
6595 }
6596
6597 /**
6598  * i40e_add_vsi - Add a VSI to the switch
6599  * @vsi: the VSI being configured
6600  *
6601  * This initializes a VSI context depending on the VSI type to be added and
6602  * passes it down to the add_vsi aq command.
6603  **/
6604 static int i40e_add_vsi(struct i40e_vsi *vsi)
6605 {
6606         int ret = -ENODEV;
6607         struct i40e_mac_filter *f, *ftmp;
6608         struct i40e_pf *pf = vsi->back;
6609         struct i40e_hw *hw = &pf->hw;
6610         struct i40e_vsi_context ctxt;
6611         u8 enabled_tc = 0x1; /* TC0 enabled */
6612         int f_count = 0;
6613
6614         memset(&ctxt, 0, sizeof(ctxt));
6615         switch (vsi->type) {
6616         case I40E_VSI_MAIN:
6617                 /* The PF's main VSI is already setup as part of the
6618                  * device initialization, so we'll not bother with
6619                  * the add_vsi call, but we will retrieve the current
6620                  * VSI context.
6621                  */
6622                 ctxt.seid = pf->main_vsi_seid;
6623                 ctxt.pf_num = pf->hw.pf_id;
6624                 ctxt.vf_num = 0;
6625                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6626                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6627                 if (ret) {
6628                         dev_info(&pf->pdev->dev,
6629                                  "couldn't get pf vsi config, err %d, aq_err %d\n",
6630                                  ret, pf->hw.aq.asq_last_status);
6631                         return -ENOENT;
6632                 }
6633                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6634                 vsi->info.valid_sections = 0;
6635
6636                 vsi->seid = ctxt.seid;
6637                 vsi->id = ctxt.vsi_number;
6638
6639                 enabled_tc = i40e_pf_get_tc_map(pf);
6640
6641                 /* MFP mode setup queue map and update VSI */
6642                 if (pf->flags & I40E_FLAG_MFP_ENABLED) {
6643                         memset(&ctxt, 0, sizeof(ctxt));
6644                         ctxt.seid = pf->main_vsi_seid;
6645                         ctxt.pf_num = pf->hw.pf_id;
6646                         ctxt.vf_num = 0;
6647                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
6648                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
6649                         if (ret) {
6650                                 dev_info(&pf->pdev->dev,
6651                                          "update vsi failed, aq_err=%d\n",
6652                                          pf->hw.aq.asq_last_status);
6653                                 ret = -ENOENT;
6654                                 goto err;
6655                         }
6656                         /* update the local VSI info queue map */
6657                         i40e_vsi_update_queue_map(vsi, &ctxt);
6658                         vsi->info.valid_sections = 0;
6659                 } else {
6660                         /* Default/Main VSI is only enabled for TC0
6661                          * reconfigure it to enable all TCs that are
6662                          * available on the port in SFP mode.
6663                          */
6664                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
6665                         if (ret) {
6666                                 dev_info(&pf->pdev->dev,
6667                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %d, aq_err %d\n",
6668                                          enabled_tc, ret,
6669                                          pf->hw.aq.asq_last_status);
6670                                 ret = -ENOENT;
6671                         }
6672                 }
6673                 break;
6674
6675         case I40E_VSI_FDIR:
6676                 ctxt.pf_num = hw->pf_id;
6677                 ctxt.vf_num = 0;
6678                 ctxt.uplink_seid = vsi->uplink_seid;
6679                 ctxt.connection_type = 0x1;     /* regular data port */
6680                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6681                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6682                 break;
6683
6684         case I40E_VSI_VMDQ2:
6685                 ctxt.pf_num = hw->pf_id;
6686                 ctxt.vf_num = 0;
6687                 ctxt.uplink_seid = vsi->uplink_seid;
6688                 ctxt.connection_type = 0x1;     /* regular data port */
6689                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
6690
6691                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6692
6693                 /* This VSI is connected to VEB so the switch_id
6694                  * should be set to zero by default.
6695                  */
6696                 ctxt.info.switch_id = 0;
6697                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
6698                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6699
6700                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6701                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6702                 break;
6703
6704         case I40E_VSI_SRIOV:
6705                 ctxt.pf_num = hw->pf_id;
6706                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
6707                 ctxt.uplink_seid = vsi->uplink_seid;
6708                 ctxt.connection_type = 0x1;     /* regular data port */
6709                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
6710
6711                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6712
6713                 /* This VSI is connected to VEB so the switch_id
6714                  * should be set to zero by default.
6715                  */
6716                 ctxt.info.switch_id = cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6717
6718                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
6719                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
6720                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6721                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6722                 break;
6723
6724         default:
6725                 return -ENODEV;
6726         }
6727
6728         if (vsi->type != I40E_VSI_MAIN) {
6729                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
6730                 if (ret) {
6731                         dev_info(&vsi->back->pdev->dev,
6732                                  "add vsi failed, aq_err=%d\n",
6733                                  vsi->back->hw.aq.asq_last_status);
6734                         ret = -ENOENT;
6735                         goto err;
6736                 }
6737                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6738                 vsi->info.valid_sections = 0;
6739                 vsi->seid = ctxt.seid;
6740                 vsi->id = ctxt.vsi_number;
6741         }
6742
6743         /* If macvlan filters already exist, force them to get loaded */
6744         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
6745                 f->changed = true;
6746                 f_count++;
6747         }
6748         if (f_count) {
6749                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
6750                 pf->flags |= I40E_FLAG_FILTER_SYNC;
6751         }
6752
6753         /* Update VSI BW information */
6754         ret = i40e_vsi_get_bw_info(vsi);
6755         if (ret) {
6756                 dev_info(&pf->pdev->dev,
6757                          "couldn't get vsi bw info, err %d, aq_err %d\n",
6758                          ret, pf->hw.aq.asq_last_status);
6759                 /* VSI is already added so not tearing that up */
6760                 ret = 0;
6761         }
6762
6763 err:
6764         return ret;
6765 }
6766
6767 /**
6768  * i40e_vsi_release - Delete a VSI and free its resources
6769  * @vsi: the VSI being removed
6770  *
6771  * Returns 0 on success or < 0 on error
6772  **/
6773 int i40e_vsi_release(struct i40e_vsi *vsi)
6774 {
6775         struct i40e_mac_filter *f, *ftmp;
6776         struct i40e_veb *veb = NULL;
6777         struct i40e_pf *pf;
6778         u16 uplink_seid;
6779         int i, n;
6780
6781         pf = vsi->back;
6782
6783         /* release of a VEB-owner or last VSI is not allowed */
6784         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
6785                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
6786                          vsi->seid, vsi->uplink_seid);
6787                 return -ENODEV;
6788         }
6789         if (vsi == pf->vsi[pf->lan_vsi] &&
6790             !test_bit(__I40E_DOWN, &pf->state)) {
6791                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
6792                 return -ENODEV;
6793         }
6794
6795         uplink_seid = vsi->uplink_seid;
6796         if (vsi->type != I40E_VSI_SRIOV) {
6797                 if (vsi->netdev_registered) {
6798                         vsi->netdev_registered = false;
6799                         if (vsi->netdev) {
6800                                 /* results in a call to i40e_close() */
6801                                 unregister_netdev(vsi->netdev);
6802                         }
6803                 } else {
6804                         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
6805                                 i40e_down(vsi);
6806                         i40e_vsi_free_irq(vsi);
6807                         i40e_vsi_free_tx_resources(vsi);
6808                         i40e_vsi_free_rx_resources(vsi);
6809                 }
6810                 i40e_vsi_disable_irq(vsi);
6811         }
6812
6813         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
6814                 i40e_del_filter(vsi, f->macaddr, f->vlan,
6815                                 f->is_vf, f->is_netdev);
6816         i40e_sync_vsi_filters(vsi);
6817
6818         i40e_vsi_delete(vsi);
6819         i40e_vsi_free_q_vectors(vsi);
6820         if (vsi->netdev) {
6821                 free_netdev(vsi->netdev);
6822                 vsi->netdev = NULL;
6823         }
6824         i40e_vsi_clear_rings(vsi);
6825         i40e_vsi_clear(vsi);
6826
6827         /* If this was the last thing on the VEB, except for the
6828          * controlling VSI, remove the VEB, which puts the controlling
6829          * VSI onto the next level down in the switch.
6830          *
6831          * Well, okay, there's one more exception here: don't remove
6832          * the orphan VEBs yet.  We'll wait for an explicit remove request
6833          * from up the network stack.
6834          */
6835         for (n = 0, i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6836                 if (pf->vsi[i] &&
6837                     pf->vsi[i]->uplink_seid == uplink_seid &&
6838                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6839                         n++;      /* count the VSIs */
6840                 }
6841         }
6842         for (i = 0; i < I40E_MAX_VEB; i++) {
6843                 if (!pf->veb[i])
6844                         continue;
6845                 if (pf->veb[i]->uplink_seid == uplink_seid)
6846                         n++;     /* count the VEBs */
6847                 if (pf->veb[i]->seid == uplink_seid)
6848                         veb = pf->veb[i];
6849         }
6850         if (n == 0 && veb && veb->uplink_seid != 0)
6851                 i40e_veb_release(veb);
6852
6853         return 0;
6854 }
6855
6856 /**
6857  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
6858  * @vsi: ptr to the VSI
6859  *
6860  * This should only be called after i40e_vsi_mem_alloc() which allocates the
6861  * corresponding SW VSI structure and initializes num_queue_pairs for the
6862  * newly allocated VSI.
6863  *
6864  * Returns 0 on success or negative on failure
6865  **/
6866 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
6867 {
6868         int ret = -ENOENT;
6869         struct i40e_pf *pf = vsi->back;
6870
6871         if (vsi->q_vectors[0]) {
6872                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
6873                          vsi->seid);
6874                 return -EEXIST;
6875         }
6876
6877         if (vsi->base_vector) {
6878                 dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
6879                          vsi->seid, vsi->base_vector);
6880                 return -EEXIST;
6881         }
6882
6883         ret = i40e_alloc_q_vectors(vsi);
6884         if (ret) {
6885                 dev_info(&pf->pdev->dev,
6886                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
6887                          vsi->num_q_vectors, vsi->seid, ret);
6888                 vsi->num_q_vectors = 0;
6889                 goto vector_setup_out;
6890         }
6891
6892         if (vsi->num_q_vectors)
6893                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
6894                                                  vsi->num_q_vectors, vsi->idx);
6895         if (vsi->base_vector < 0) {
6896                 dev_info(&pf->pdev->dev,
6897                          "failed to get queue tracking for VSI %d, err=%d\n",
6898                          vsi->seid, vsi->base_vector);
6899                 i40e_vsi_free_q_vectors(vsi);
6900                 ret = -ENOENT;
6901                 goto vector_setup_out;
6902         }
6903
6904 vector_setup_out:
6905         return ret;
6906 }
6907
6908 /**
6909  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
6910  * @vsi: pointer to the vsi.
6911  *
6912  * This re-allocates a vsi's queue resources.
6913  *
6914  * Returns pointer to the successfully allocated and configured VSI sw struct
6915  * on success, otherwise returns NULL on failure.
6916  **/
6917 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
6918 {
6919         struct i40e_pf *pf = vsi->back;
6920         u8 enabled_tc;
6921         int ret;
6922
6923         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
6924         i40e_vsi_clear_rings(vsi);
6925
6926         i40e_vsi_free_arrays(vsi, false);
6927         i40e_set_num_rings_in_vsi(vsi);
6928         ret = i40e_vsi_alloc_arrays(vsi, false);
6929         if (ret)
6930                 goto err_vsi;
6931
6932         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
6933         if (ret < 0) {
6934                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
6935                          vsi->seid, ret);
6936                 goto err_vsi;
6937         }
6938         vsi->base_queue = ret;
6939
6940         /* Update the FW view of the VSI. Force a reset of TC and queue
6941          * layout configurations.
6942          */
6943         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
6944         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
6945         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
6946         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
6947
6948         /* assign it some queues */
6949         ret = i40e_alloc_rings(vsi);
6950         if (ret)
6951                 goto err_rings;
6952
6953         /* map all of the rings to the q_vectors */
6954         i40e_vsi_map_rings_to_vectors(vsi);
6955         return vsi;
6956
6957 err_rings:
6958         i40e_vsi_free_q_vectors(vsi);
6959         if (vsi->netdev_registered) {
6960                 vsi->netdev_registered = false;
6961                 unregister_netdev(vsi->netdev);
6962                 free_netdev(vsi->netdev);
6963                 vsi->netdev = NULL;
6964         }
6965         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
6966 err_vsi:
6967         i40e_vsi_clear(vsi);
6968         return NULL;
6969 }
6970
6971 /**
6972  * i40e_vsi_setup - Set up a VSI by a given type
6973  * @pf: board private structure
6974  * @type: VSI type
6975  * @uplink_seid: the switch element to link to
6976  * @param1: usage depends upon VSI type. For VF types, indicates VF id
6977  *
6978  * This allocates the sw VSI structure and its queue resources, then add a VSI
6979  * to the identified VEB.
6980  *
6981  * Returns pointer to the successfully allocated and configure VSI sw struct on
6982  * success, otherwise returns NULL on failure.
6983  **/
6984 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
6985                                 u16 uplink_seid, u32 param1)
6986 {
6987         struct i40e_vsi *vsi = NULL;
6988         struct i40e_veb *veb = NULL;
6989         int ret, i;
6990         int v_idx;
6991
6992         /* The requested uplink_seid must be either
6993          *     - the PF's port seid
6994          *              no VEB is needed because this is the PF
6995          *              or this is a Flow Director special case VSI
6996          *     - seid of an existing VEB
6997          *     - seid of a VSI that owns an existing VEB
6998          *     - seid of a VSI that doesn't own a VEB
6999          *              a new VEB is created and the VSI becomes the owner
7000          *     - seid of the PF VSI, which is what creates the first VEB
7001          *              this is a special case of the previous
7002          *
7003          * Find which uplink_seid we were given and create a new VEB if needed
7004          */
7005         for (i = 0; i < I40E_MAX_VEB; i++) {
7006                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
7007                         veb = pf->veb[i];
7008                         break;
7009                 }
7010         }
7011
7012         if (!veb && uplink_seid != pf->mac_seid) {
7013
7014                 for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7015                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
7016                                 vsi = pf->vsi[i];
7017                                 break;
7018                         }
7019                 }
7020                 if (!vsi) {
7021                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
7022                                  uplink_seid);
7023                         return NULL;
7024                 }
7025
7026                 if (vsi->uplink_seid == pf->mac_seid)
7027                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
7028                                              vsi->tc_config.enabled_tc);
7029                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
7030                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
7031                                              vsi->tc_config.enabled_tc);
7032
7033                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
7034                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
7035                                 veb = pf->veb[i];
7036                 }
7037                 if (!veb) {
7038                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
7039                         return NULL;
7040                 }
7041
7042                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
7043                 uplink_seid = veb->seid;
7044         }
7045
7046         /* get vsi sw struct */
7047         v_idx = i40e_vsi_mem_alloc(pf, type);
7048         if (v_idx < 0)
7049                 goto err_alloc;
7050         vsi = pf->vsi[v_idx];
7051         if (!vsi)
7052                 goto err_alloc;
7053         vsi->type = type;
7054         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
7055
7056         if (type == I40E_VSI_MAIN)
7057                 pf->lan_vsi = v_idx;
7058         else if (type == I40E_VSI_SRIOV)
7059                 vsi->vf_id = param1;
7060         /* assign it some queues */
7061         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs,
7062                                 vsi->idx);
7063         if (ret < 0) {
7064                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
7065                          vsi->seid, ret);
7066                 goto err_vsi;
7067         }
7068         vsi->base_queue = ret;
7069
7070         /* get a VSI from the hardware */
7071         vsi->uplink_seid = uplink_seid;
7072         ret = i40e_add_vsi(vsi);
7073         if (ret)
7074                 goto err_vsi;
7075
7076         switch (vsi->type) {
7077         /* setup the netdev if needed */
7078         case I40E_VSI_MAIN:
7079         case I40E_VSI_VMDQ2:
7080                 ret = i40e_config_netdev(vsi);
7081                 if (ret)
7082                         goto err_netdev;
7083                 ret = register_netdev(vsi->netdev);
7084                 if (ret)
7085                         goto err_netdev;
7086                 vsi->netdev_registered = true;
7087                 netif_carrier_off(vsi->netdev);
7088 #ifdef CONFIG_I40E_DCB
7089                 /* Setup DCB netlink interface */
7090                 i40e_dcbnl_setup(vsi);
7091 #endif /* CONFIG_I40E_DCB */
7092                 /* fall through */
7093
7094         case I40E_VSI_FDIR:
7095                 /* set up vectors and rings if needed */
7096                 ret = i40e_vsi_setup_vectors(vsi);
7097                 if (ret)
7098                         goto err_msix;
7099
7100                 ret = i40e_alloc_rings(vsi);
7101                 if (ret)
7102                         goto err_rings;
7103
7104                 /* map all of the rings to the q_vectors */
7105                 i40e_vsi_map_rings_to_vectors(vsi);
7106
7107                 i40e_vsi_reset_stats(vsi);
7108                 break;
7109
7110         default:
7111                 /* no netdev or rings for the other VSI types */
7112                 break;
7113         }
7114
7115         return vsi;
7116
7117 err_rings:
7118         i40e_vsi_free_q_vectors(vsi);
7119 err_msix:
7120         if (vsi->netdev_registered) {
7121                 vsi->netdev_registered = false;
7122                 unregister_netdev(vsi->netdev);
7123                 free_netdev(vsi->netdev);
7124                 vsi->netdev = NULL;
7125         }
7126 err_netdev:
7127         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
7128 err_vsi:
7129         i40e_vsi_clear(vsi);
7130 err_alloc:
7131         return NULL;
7132 }
7133
7134 /**
7135  * i40e_veb_get_bw_info - Query VEB BW information
7136  * @veb: the veb to query
7137  *
7138  * Query the Tx scheduler BW configuration data for given VEB
7139  **/
7140 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
7141 {
7142         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
7143         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
7144         struct i40e_pf *pf = veb->pf;
7145         struct i40e_hw *hw = &pf->hw;
7146         u32 tc_bw_max;
7147         int ret = 0;
7148         int i;
7149
7150         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
7151                                                   &bw_data, NULL);
7152         if (ret) {
7153                 dev_info(&pf->pdev->dev,
7154                          "query veb bw config failed, aq_err=%d\n",
7155                          hw->aq.asq_last_status);
7156                 goto out;
7157         }
7158
7159         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
7160                                                    &ets_data, NULL);
7161         if (ret) {
7162                 dev_info(&pf->pdev->dev,
7163                          "query veb bw ets config failed, aq_err=%d\n",
7164                          hw->aq.asq_last_status);
7165                 goto out;
7166         }
7167
7168         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
7169         veb->bw_max_quanta = ets_data.tc_bw_max;
7170         veb->is_abs_credits = bw_data.absolute_credits_enable;
7171         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
7172                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
7173         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
7174                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
7175                 veb->bw_tc_limit_credits[i] =
7176                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
7177                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
7178         }
7179
7180 out:
7181         return ret;
7182 }
7183
7184 /**
7185  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
7186  * @pf: board private structure
7187  *
7188  * On error: returns error code (negative)
7189  * On success: returns vsi index in PF (positive)
7190  **/
7191 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
7192 {
7193         int ret = -ENOENT;
7194         struct i40e_veb *veb;
7195         int i;
7196
7197         /* Need to protect the allocation of switch elements at the PF level */
7198         mutex_lock(&pf->switch_mutex);
7199
7200         /* VEB list may be fragmented if VEB creation/destruction has
7201          * been happening.  We can afford to do a quick scan to look
7202          * for any free slots in the list.
7203          *
7204          * find next empty veb slot, looping back around if necessary
7205          */
7206         i = 0;
7207         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
7208                 i++;
7209         if (i >= I40E_MAX_VEB) {
7210                 ret = -ENOMEM;
7211                 goto err_alloc_veb;  /* out of VEB slots! */
7212         }
7213
7214         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
7215         if (!veb) {
7216                 ret = -ENOMEM;
7217                 goto err_alloc_veb;
7218         }
7219         veb->pf = pf;
7220         veb->idx = i;
7221         veb->enabled_tc = 1;
7222
7223         pf->veb[i] = veb;
7224         ret = i;
7225 err_alloc_veb:
7226         mutex_unlock(&pf->switch_mutex);
7227         return ret;
7228 }
7229
7230 /**
7231  * i40e_switch_branch_release - Delete a branch of the switch tree
7232  * @branch: where to start deleting
7233  *
7234  * This uses recursion to find the tips of the branch to be
7235  * removed, deleting until we get back to and can delete this VEB.
7236  **/
7237 static void i40e_switch_branch_release(struct i40e_veb *branch)
7238 {
7239         struct i40e_pf *pf = branch->pf;
7240         u16 branch_seid = branch->seid;
7241         u16 veb_idx = branch->idx;
7242         int i;
7243
7244         /* release any VEBs on this VEB - RECURSION */
7245         for (i = 0; i < I40E_MAX_VEB; i++) {
7246                 if (!pf->veb[i])
7247                         continue;
7248                 if (pf->veb[i]->uplink_seid == branch->seid)
7249                         i40e_switch_branch_release(pf->veb[i]);
7250         }
7251
7252         /* Release the VSIs on this VEB, but not the owner VSI.
7253          *
7254          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
7255          *       the VEB itself, so don't use (*branch) after this loop.
7256          */
7257         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7258                 if (!pf->vsi[i])
7259                         continue;
7260                 if (pf->vsi[i]->uplink_seid == branch_seid &&
7261                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
7262                         i40e_vsi_release(pf->vsi[i]);
7263                 }
7264         }
7265
7266         /* There's one corner case where the VEB might not have been
7267          * removed, so double check it here and remove it if needed.
7268          * This case happens if the veb was created from the debugfs
7269          * commands and no VSIs were added to it.
7270          */
7271         if (pf->veb[veb_idx])
7272                 i40e_veb_release(pf->veb[veb_idx]);
7273 }
7274
7275 /**
7276  * i40e_veb_clear - remove veb struct
7277  * @veb: the veb to remove
7278  **/
7279 static void i40e_veb_clear(struct i40e_veb *veb)
7280 {
7281         if (!veb)
7282                 return;
7283
7284         if (veb->pf) {
7285                 struct i40e_pf *pf = veb->pf;
7286
7287                 mutex_lock(&pf->switch_mutex);
7288                 if (pf->veb[veb->idx] == veb)
7289                         pf->veb[veb->idx] = NULL;
7290                 mutex_unlock(&pf->switch_mutex);
7291         }
7292
7293         kfree(veb);
7294 }
7295
7296 /**
7297  * i40e_veb_release - Delete a VEB and free its resources
7298  * @veb: the VEB being removed
7299  **/
7300 void i40e_veb_release(struct i40e_veb *veb)
7301 {
7302         struct i40e_vsi *vsi = NULL;
7303         struct i40e_pf *pf;
7304         int i, n = 0;
7305
7306         pf = veb->pf;
7307
7308         /* find the remaining VSI and check for extras */
7309         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7310                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
7311                         n++;
7312                         vsi = pf->vsi[i];
7313                 }
7314         }
7315         if (n != 1) {
7316                 dev_info(&pf->pdev->dev,
7317                          "can't remove VEB %d with %d VSIs left\n",
7318                          veb->seid, n);
7319                 return;
7320         }
7321
7322         /* move the remaining VSI to uplink veb */
7323         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
7324         if (veb->uplink_seid) {
7325                 vsi->uplink_seid = veb->uplink_seid;
7326                 if (veb->uplink_seid == pf->mac_seid)
7327                         vsi->veb_idx = I40E_NO_VEB;
7328                 else
7329                         vsi->veb_idx = veb->veb_idx;
7330         } else {
7331                 /* floating VEB */
7332                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
7333                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
7334         }
7335
7336         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
7337         i40e_veb_clear(veb);
7338
7339         return;
7340 }
7341
7342 /**
7343  * i40e_add_veb - create the VEB in the switch
7344  * @veb: the VEB to be instantiated
7345  * @vsi: the controlling VSI
7346  **/
7347 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
7348 {
7349         bool is_default = false;
7350         bool is_cloud = false;
7351         int ret;
7352
7353         /* get a VEB from the hardware */
7354         ret = i40e_aq_add_veb(&veb->pf->hw, veb->uplink_seid, vsi->seid,
7355                               veb->enabled_tc, is_default,
7356                               is_cloud, &veb->seid, NULL);
7357         if (ret) {
7358                 dev_info(&veb->pf->pdev->dev,
7359                          "couldn't add VEB, err %d, aq_err %d\n",
7360                          ret, veb->pf->hw.aq.asq_last_status);
7361                 return -EPERM;
7362         }
7363
7364         /* get statistics counter */
7365         ret = i40e_aq_get_veb_parameters(&veb->pf->hw, veb->seid, NULL, NULL,
7366                                          &veb->stats_idx, NULL, NULL, NULL);
7367         if (ret) {
7368                 dev_info(&veb->pf->pdev->dev,
7369                          "couldn't get VEB statistics idx, err %d, aq_err %d\n",
7370                          ret, veb->pf->hw.aq.asq_last_status);
7371                 return -EPERM;
7372         }
7373         ret = i40e_veb_get_bw_info(veb);
7374         if (ret) {
7375                 dev_info(&veb->pf->pdev->dev,
7376                          "couldn't get VEB bw info, err %d, aq_err %d\n",
7377                          ret, veb->pf->hw.aq.asq_last_status);
7378                 i40e_aq_delete_element(&veb->pf->hw, veb->seid, NULL);
7379                 return -ENOENT;
7380         }
7381
7382         vsi->uplink_seid = veb->seid;
7383         vsi->veb_idx = veb->idx;
7384         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
7385
7386         return 0;
7387 }
7388
7389 /**
7390  * i40e_veb_setup - Set up a VEB
7391  * @pf: board private structure
7392  * @flags: VEB setup flags
7393  * @uplink_seid: the switch element to link to
7394  * @vsi_seid: the initial VSI seid
7395  * @enabled_tc: Enabled TC bit-map
7396  *
7397  * This allocates the sw VEB structure and links it into the switch
7398  * It is possible and legal for this to be a duplicate of an already
7399  * existing VEB.  It is also possible for both uplink and vsi seids
7400  * to be zero, in order to create a floating VEB.
7401  *
7402  * Returns pointer to the successfully allocated VEB sw struct on
7403  * success, otherwise returns NULL on failure.
7404  **/
7405 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
7406                                 u16 uplink_seid, u16 vsi_seid,
7407                                 u8 enabled_tc)
7408 {
7409         struct i40e_veb *veb, *uplink_veb = NULL;
7410         int vsi_idx, veb_idx;
7411         int ret;
7412
7413         /* if one seid is 0, the other must be 0 to create a floating relay */
7414         if ((uplink_seid == 0 || vsi_seid == 0) &&
7415             (uplink_seid + vsi_seid != 0)) {
7416                 dev_info(&pf->pdev->dev,
7417                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
7418                          uplink_seid, vsi_seid);
7419                 return NULL;
7420         }
7421
7422         /* make sure there is such a vsi and uplink */
7423         for (vsi_idx = 0; vsi_idx < pf->hw.func_caps.num_vsis; vsi_idx++)
7424                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
7425                         break;
7426         if (vsi_idx >= pf->hw.func_caps.num_vsis && vsi_seid != 0) {
7427                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
7428                          vsi_seid);
7429                 return NULL;
7430         }
7431
7432         if (uplink_seid && uplink_seid != pf->mac_seid) {
7433                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
7434                         if (pf->veb[veb_idx] &&
7435                             pf->veb[veb_idx]->seid == uplink_seid) {
7436                                 uplink_veb = pf->veb[veb_idx];
7437                                 break;
7438                         }
7439                 }
7440                 if (!uplink_veb) {
7441                         dev_info(&pf->pdev->dev,
7442                                  "uplink seid %d not found\n", uplink_seid);
7443                         return NULL;
7444                 }
7445         }
7446
7447         /* get veb sw struct */
7448         veb_idx = i40e_veb_mem_alloc(pf);
7449         if (veb_idx < 0)
7450                 goto err_alloc;
7451         veb = pf->veb[veb_idx];
7452         veb->flags = flags;
7453         veb->uplink_seid = uplink_seid;
7454         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
7455         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
7456
7457         /* create the VEB in the switch */
7458         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
7459         if (ret)
7460                 goto err_veb;
7461
7462         return veb;
7463
7464 err_veb:
7465         i40e_veb_clear(veb);
7466 err_alloc:
7467         return NULL;
7468 }
7469
7470 /**
7471  * i40e_setup_pf_switch_element - set pf vars based on switch type
7472  * @pf: board private structure
7473  * @ele: element we are building info from
7474  * @num_reported: total number of elements
7475  * @printconfig: should we print the contents
7476  *
7477  * helper function to assist in extracting a few useful SEID values.
7478  **/
7479 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
7480                                 struct i40e_aqc_switch_config_element_resp *ele,
7481                                 u16 num_reported, bool printconfig)
7482 {
7483         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
7484         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
7485         u8 element_type = ele->element_type;
7486         u16 seid = le16_to_cpu(ele->seid);
7487
7488         if (printconfig)
7489                 dev_info(&pf->pdev->dev,
7490                          "type=%d seid=%d uplink=%d downlink=%d\n",
7491                          element_type, seid, uplink_seid, downlink_seid);
7492
7493         switch (element_type) {
7494         case I40E_SWITCH_ELEMENT_TYPE_MAC:
7495                 pf->mac_seid = seid;
7496                 break;
7497         case I40E_SWITCH_ELEMENT_TYPE_VEB:
7498                 /* Main VEB? */
7499                 if (uplink_seid != pf->mac_seid)
7500                         break;
7501                 if (pf->lan_veb == I40E_NO_VEB) {
7502                         int v;
7503
7504                         /* find existing or else empty VEB */
7505                         for (v = 0; v < I40E_MAX_VEB; v++) {
7506                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
7507                                         pf->lan_veb = v;
7508                                         break;
7509                                 }
7510                         }
7511                         if (pf->lan_veb == I40E_NO_VEB) {
7512                                 v = i40e_veb_mem_alloc(pf);
7513                                 if (v < 0)
7514                                         break;
7515                                 pf->lan_veb = v;
7516                         }
7517                 }
7518
7519                 pf->veb[pf->lan_veb]->seid = seid;
7520                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
7521                 pf->veb[pf->lan_veb]->pf = pf;
7522                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
7523                 break;
7524         case I40E_SWITCH_ELEMENT_TYPE_VSI:
7525                 if (num_reported != 1)
7526                         break;
7527                 /* This is immediately after a reset so we can assume this is
7528                  * the PF's VSI
7529                  */
7530                 pf->mac_seid = uplink_seid;
7531                 pf->pf_seid = downlink_seid;
7532                 pf->main_vsi_seid = seid;
7533                 if (printconfig)
7534                         dev_info(&pf->pdev->dev,
7535                                  "pf_seid=%d main_vsi_seid=%d\n",
7536                                  pf->pf_seid, pf->main_vsi_seid);
7537                 break;
7538         case I40E_SWITCH_ELEMENT_TYPE_PF:
7539         case I40E_SWITCH_ELEMENT_TYPE_VF:
7540         case I40E_SWITCH_ELEMENT_TYPE_EMP:
7541         case I40E_SWITCH_ELEMENT_TYPE_BMC:
7542         case I40E_SWITCH_ELEMENT_TYPE_PE:
7543         case I40E_SWITCH_ELEMENT_TYPE_PA:
7544                 /* ignore these for now */
7545                 break;
7546         default:
7547                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
7548                          element_type, seid);
7549                 break;
7550         }
7551 }
7552
7553 /**
7554  * i40e_fetch_switch_configuration - Get switch config from firmware
7555  * @pf: board private structure
7556  * @printconfig: should we print the contents
7557  *
7558  * Get the current switch configuration from the device and
7559  * extract a few useful SEID values.
7560  **/
7561 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
7562 {
7563         struct i40e_aqc_get_switch_config_resp *sw_config;
7564         u16 next_seid = 0;
7565         int ret = 0;
7566         u8 *aq_buf;
7567         int i;
7568
7569         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
7570         if (!aq_buf)
7571                 return -ENOMEM;
7572
7573         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
7574         do {
7575                 u16 num_reported, num_total;
7576
7577                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
7578                                                 I40E_AQ_LARGE_BUF,
7579                                                 &next_seid, NULL);
7580                 if (ret) {
7581                         dev_info(&pf->pdev->dev,
7582                                  "get switch config failed %d aq_err=%x\n",
7583                                  ret, pf->hw.aq.asq_last_status);
7584                         kfree(aq_buf);
7585                         return -ENOENT;
7586                 }
7587
7588                 num_reported = le16_to_cpu(sw_config->header.num_reported);
7589                 num_total = le16_to_cpu(sw_config->header.num_total);
7590
7591                 if (printconfig)
7592                         dev_info(&pf->pdev->dev,
7593                                  "header: %d reported %d total\n",
7594                                  num_reported, num_total);
7595
7596                 if (num_reported) {
7597                         int sz = sizeof(*sw_config) * num_reported;
7598
7599                         kfree(pf->sw_config);
7600                         pf->sw_config = kzalloc(sz, GFP_KERNEL);
7601                         if (pf->sw_config)
7602                                 memcpy(pf->sw_config, sw_config, sz);
7603                 }
7604
7605                 for (i = 0; i < num_reported; i++) {
7606                         struct i40e_aqc_switch_config_element_resp *ele =
7607                                 &sw_config->element[i];
7608
7609                         i40e_setup_pf_switch_element(pf, ele, num_reported,
7610                                                      printconfig);
7611                 }
7612         } while (next_seid != 0);
7613
7614         kfree(aq_buf);
7615         return ret;
7616 }
7617
7618 /**
7619  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
7620  * @pf: board private structure
7621  * @reinit: if the Main VSI needs to re-initialized.
7622  *
7623  * Returns 0 on success, negative value on failure
7624  **/
7625 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
7626 {
7627         u32 rxfc = 0, txfc = 0, rxfc_reg;
7628         int ret;
7629
7630         /* find out what's out there already */
7631         ret = i40e_fetch_switch_configuration(pf, false);
7632         if (ret) {
7633                 dev_info(&pf->pdev->dev,
7634                          "couldn't fetch switch config, err %d, aq_err %d\n",
7635                          ret, pf->hw.aq.asq_last_status);
7636                 return ret;
7637         }
7638         i40e_pf_reset_stats(pf);
7639
7640         /* first time setup */
7641         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
7642                 struct i40e_vsi *vsi = NULL;
7643                 u16 uplink_seid;
7644
7645                 /* Set up the PF VSI associated with the PF's main VSI
7646                  * that is already in the HW switch
7647                  */
7648                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
7649                         uplink_seid = pf->veb[pf->lan_veb]->seid;
7650                 else
7651                         uplink_seid = pf->mac_seid;
7652                 if (pf->lan_vsi == I40E_NO_VSI)
7653                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
7654                 else if (reinit)
7655                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
7656                 if (!vsi) {
7657                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
7658                         i40e_fdir_teardown(pf);
7659                         return -EAGAIN;
7660                 }
7661         } else {
7662                 /* force a reset of TC and queue layout configurations */
7663                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
7664                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
7665                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
7666                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
7667         }
7668         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
7669
7670         i40e_fdir_sb_setup(pf);
7671
7672         /* Setup static PF queue filter control settings */
7673         ret = i40e_setup_pf_filter_control(pf);
7674         if (ret) {
7675                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
7676                          ret);
7677                 /* Failure here should not stop continuing other steps */
7678         }
7679
7680         /* enable RSS in the HW, even for only one queue, as the stack can use
7681          * the hash
7682          */
7683         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
7684                 i40e_config_rss(pf);
7685
7686         /* fill in link information and enable LSE reporting */
7687         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
7688         i40e_link_event(pf);
7689
7690         /* Initialize user-specific link properties */
7691         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
7692                                   I40E_AQ_AN_COMPLETED) ? true : false);
7693         /* requested_mode is set in probe or by ethtool */
7694         if (!pf->fc_autoneg_status)
7695                 goto no_autoneg;
7696
7697         if ((pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX) &&
7698             (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX))
7699                 pf->hw.fc.current_mode = I40E_FC_FULL;
7700         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX)
7701                 pf->hw.fc.current_mode = I40E_FC_TX_PAUSE;
7702         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX)
7703                 pf->hw.fc.current_mode = I40E_FC_RX_PAUSE;
7704         else
7705                 pf->hw.fc.current_mode = I40E_FC_NONE;
7706
7707         /* sync the flow control settings with the auto-neg values */
7708         switch (pf->hw.fc.current_mode) {
7709         case I40E_FC_FULL:
7710                 txfc = 1;
7711                 rxfc = 1;
7712                 break;
7713         case I40E_FC_TX_PAUSE:
7714                 txfc = 1;
7715                 rxfc = 0;
7716                 break;
7717         case I40E_FC_RX_PAUSE:
7718                 txfc = 0;
7719                 rxfc = 1;
7720                 break;
7721         case I40E_FC_NONE:
7722         case I40E_FC_DEFAULT:
7723                 txfc = 0;
7724                 rxfc = 0;
7725                 break;
7726         case I40E_FC_PFC:
7727                 /* TBD */
7728                 break;
7729         /* no default case, we have to handle all possibilities here */
7730         }
7731
7732         wr32(&pf->hw, I40E_PRTDCB_FCCFG, txfc << I40E_PRTDCB_FCCFG_TFCE_SHIFT);
7733
7734         rxfc_reg = rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7735                    ~I40E_PRTDCB_MFLCN_RFCE_MASK;
7736         rxfc_reg |= (rxfc << I40E_PRTDCB_MFLCN_RFCE_SHIFT);
7737
7738         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rxfc_reg);
7739
7740         goto fc_complete;
7741
7742 no_autoneg:
7743         /* disable L2 flow control, user can turn it on if they wish */
7744         wr32(&pf->hw, I40E_PRTDCB_FCCFG, 0);
7745         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7746                                          ~I40E_PRTDCB_MFLCN_RFCE_MASK);
7747
7748 fc_complete:
7749         i40e_ptp_init(pf);
7750
7751         return ret;
7752 }
7753
7754 /**
7755  * i40e_determine_queue_usage - Work out queue distribution
7756  * @pf: board private structure
7757  **/
7758 static void i40e_determine_queue_usage(struct i40e_pf *pf)
7759 {
7760         int queues_left;
7761
7762         pf->num_lan_qps = 0;
7763
7764         /* Find the max queues to be put into basic use.  We'll always be
7765          * using TC0, whether or not DCB is running, and TC0 will get the
7766          * big RSS set.
7767          */
7768         queues_left = pf->hw.func_caps.num_tx_qp;
7769
7770         if ((queues_left == 1) ||
7771             !(pf->flags & I40E_FLAG_MSIX_ENABLED) ||
7772             !(pf->flags & (I40E_FLAG_RSS_ENABLED | I40E_FLAG_FD_SB_ENABLED |
7773                            I40E_FLAG_DCB_ENABLED))) {
7774                 /* one qp for PF, no queues for anything else */
7775                 queues_left = 0;
7776                 pf->rss_size = pf->num_lan_qps = 1;
7777
7778                 /* make sure all the fancies are disabled */
7779                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
7780                                I40E_FLAG_FD_SB_ENABLED  |
7781                                I40E_FLAG_FD_ATR_ENABLED |
7782                                I40E_FLAG_DCB_ENABLED    |
7783                                I40E_FLAG_SRIOV_ENABLED  |
7784                                I40E_FLAG_VMDQ_ENABLED);
7785         } else {
7786                 /* Not enough queues for all TCs */
7787                 if ((pf->flags & I40E_FLAG_DCB_ENABLED) &&
7788                     (queues_left < I40E_MAX_TRAFFIC_CLASS)) {
7789                         pf->flags &= ~I40E_FLAG_DCB_ENABLED;
7790                         dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
7791                 }
7792                 pf->num_lan_qps = pf->rss_size_max;
7793                 queues_left -= pf->num_lan_qps;
7794         }
7795
7796         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
7797                 if (queues_left > 1) {
7798                         queues_left -= 1; /* save 1 queue for FD */
7799                 } else {
7800                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
7801                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
7802                 }
7803         }
7804
7805         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7806             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
7807                 pf->num_req_vfs = min_t(int, pf->num_req_vfs,
7808                                         (queues_left / pf->num_vf_qps));
7809                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
7810         }
7811
7812         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
7813             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
7814                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
7815                                           (queues_left / pf->num_vmdq_qps));
7816                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
7817         }
7818
7819         pf->queues_left = queues_left;
7820         return;
7821 }
7822
7823 /**
7824  * i40e_setup_pf_filter_control - Setup PF static filter control
7825  * @pf: PF to be setup
7826  *
7827  * i40e_setup_pf_filter_control sets up a pf's initial filter control
7828  * settings. If PE/FCoE are enabled then it will also set the per PF
7829  * based filter sizes required for them. It also enables Flow director,
7830  * ethertype and macvlan type filter settings for the pf.
7831  *
7832  * Returns 0 on success, negative on failure
7833  **/
7834 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
7835 {
7836         struct i40e_filter_control_settings *settings = &pf->filter_settings;
7837
7838         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
7839
7840         /* Flow Director is enabled */
7841         if (pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED))
7842                 settings->enable_fdir = true;
7843
7844         /* Ethtype and MACVLAN filters enabled for PF */
7845         settings->enable_ethtype = true;
7846         settings->enable_macvlan = true;
7847
7848         if (i40e_set_filter_control(&pf->hw, settings))
7849                 return -ENOENT;
7850
7851         return 0;
7852 }
7853
7854 /**
7855  * i40e_probe - Device initialization routine
7856  * @pdev: PCI device information struct
7857  * @ent: entry in i40e_pci_tbl
7858  *
7859  * i40e_probe initializes a pf identified by a pci_dev structure.
7860  * The OS initialization, configuring of the pf private structure,
7861  * and a hardware reset occur.
7862  *
7863  * Returns 0 on success, negative on failure
7864  **/
7865 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
7866 {
7867         struct i40e_driver_version dv;
7868         struct i40e_pf *pf;
7869         struct i40e_hw *hw;
7870         static u16 pfs_found;
7871         u16 link_status;
7872         int err = 0;
7873         u32 len;
7874
7875         err = pci_enable_device_mem(pdev);
7876         if (err)
7877                 return err;
7878
7879         /* set up for high or low dma */
7880         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7881                 /* coherent mask for the same size will always succeed if
7882                  * dma_set_mask does
7883                  */
7884                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
7885         } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
7886                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
7887         } else {
7888                 dev_err(&pdev->dev, "DMA configuration failed: %d\n", err);
7889                 err = -EIO;
7890                 goto err_dma;
7891         }
7892
7893         /* set up pci connections */
7894         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7895                                            IORESOURCE_MEM), i40e_driver_name);
7896         if (err) {
7897                 dev_info(&pdev->dev,
7898                          "pci_request_selected_regions failed %d\n", err);
7899                 goto err_pci_reg;
7900         }
7901
7902         pci_enable_pcie_error_reporting(pdev);
7903         pci_set_master(pdev);
7904
7905         /* Now that we have a PCI connection, we need to do the
7906          * low level device setup.  This is primarily setting up
7907          * the Admin Queue structures and then querying for the
7908          * device's current profile information.
7909          */
7910         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
7911         if (!pf) {
7912                 err = -ENOMEM;
7913                 goto err_pf_alloc;
7914         }
7915         pf->next_vsi = 0;
7916         pf->pdev = pdev;
7917         set_bit(__I40E_DOWN, &pf->state);
7918
7919         hw = &pf->hw;
7920         hw->back = pf;
7921         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7922                               pci_resource_len(pdev, 0));
7923         if (!hw->hw_addr) {
7924                 err = -EIO;
7925                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
7926                          (unsigned int)pci_resource_start(pdev, 0),
7927                          (unsigned int)pci_resource_len(pdev, 0), err);
7928                 goto err_ioremap;
7929         }
7930         hw->vendor_id = pdev->vendor;
7931         hw->device_id = pdev->device;
7932         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
7933         hw->subsystem_vendor_id = pdev->subsystem_vendor;
7934         hw->subsystem_device_id = pdev->subsystem_device;
7935         hw->bus.device = PCI_SLOT(pdev->devfn);
7936         hw->bus.func = PCI_FUNC(pdev->devfn);
7937         pf->instance = pfs_found;
7938
7939         /* do a special CORER for clearing PXE mode once at init */
7940         if (hw->revision_id == 0 &&
7941             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
7942                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
7943                 i40e_flush(hw);
7944                 msleep(200);
7945                 pf->corer_count++;
7946
7947                 i40e_clear_pxe_mode(hw);
7948         }
7949
7950         /* Reset here to make sure all is clean and to define PF 'n' */
7951         err = i40e_pf_reset(hw);
7952         if (err) {
7953                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
7954                 goto err_pf_reset;
7955         }
7956         pf->pfr_count++;
7957
7958         hw->aq.num_arq_entries = I40E_AQ_LEN;
7959         hw->aq.num_asq_entries = I40E_AQ_LEN;
7960         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7961         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
7962         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
7963         snprintf(pf->misc_int_name, sizeof(pf->misc_int_name) - 1,
7964                  "%s-pf%d:misc",
7965                  dev_driver_string(&pf->pdev->dev), pf->hw.pf_id);
7966
7967         err = i40e_init_shared_code(hw);
7968         if (err) {
7969                 dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
7970                 goto err_pf_reset;
7971         }
7972
7973         /* set up a default setting for link flow control */
7974         pf->hw.fc.requested_mode = I40E_FC_NONE;
7975
7976         err = i40e_init_adminq(hw);
7977         dev_info(&pdev->dev, "%s\n", i40e_fw_version_str(hw));
7978         if (err) {
7979                 dev_info(&pdev->dev,
7980                          "init_adminq failed: %d expecting API %02x.%02x\n",
7981                          err,
7982                          I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
7983                 goto err_pf_reset;
7984         }
7985
7986         i40e_clear_pxe_mode(hw);
7987         err = i40e_get_capabilities(pf);
7988         if (err)
7989                 goto err_adminq_setup;
7990
7991         err = i40e_sw_init(pf);
7992         if (err) {
7993                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
7994                 goto err_sw_init;
7995         }
7996
7997         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
7998                                 hw->func_caps.num_rx_qp,
7999                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
8000         if (err) {
8001                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
8002                 goto err_init_lan_hmc;
8003         }
8004
8005         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
8006         if (err) {
8007                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
8008                 err = -ENOENT;
8009                 goto err_configure_lan_hmc;
8010         }
8011
8012         i40e_get_mac_addr(hw, hw->mac.addr);
8013         if (!is_valid_ether_addr(hw->mac.addr)) {
8014                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
8015                 err = -EIO;
8016                 goto err_mac_addr;
8017         }
8018         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
8019         memcpy(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN);
8020
8021         pci_set_drvdata(pdev, pf);
8022         pci_save_state(pdev);
8023 #ifdef CONFIG_I40E_DCB
8024         err = i40e_init_pf_dcb(pf);
8025         if (err) {
8026                 dev_info(&pdev->dev, "init_pf_dcb failed: %d\n", err);
8027                 pf->flags &= ~I40E_FLAG_DCB_ENABLED;
8028                 goto err_init_dcb;
8029         }
8030 #endif /* CONFIG_I40E_DCB */
8031
8032         /* set up periodic task facility */
8033         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
8034         pf->service_timer_period = HZ;
8035
8036         INIT_WORK(&pf->service_task, i40e_service_task);
8037         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
8038         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
8039         pf->link_check_timeout = jiffies;
8040
8041         /* WoL defaults to disabled */
8042         pf->wol_en = false;
8043         device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
8044
8045         /* set up the main switch operations */
8046         i40e_determine_queue_usage(pf);
8047         i40e_init_interrupt_scheme(pf);
8048
8049         /* Set up the *vsi struct based on the number of VSIs in the HW,
8050          * and set up our local tracking of the MAIN PF vsi.
8051          */
8052         len = sizeof(struct i40e_vsi *) * pf->hw.func_caps.num_vsis;
8053         pf->vsi = kzalloc(len, GFP_KERNEL);
8054         if (!pf->vsi) {
8055                 err = -ENOMEM;
8056                 goto err_switch_setup;
8057         }
8058
8059         err = i40e_setup_pf_switch(pf, false);
8060         if (err) {
8061                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
8062                 goto err_vsis;
8063         }
8064
8065         /* The main driver is (mostly) up and happy. We need to set this state
8066          * before setting up the misc vector or we get a race and the vector
8067          * ends up disabled forever.
8068          */
8069         clear_bit(__I40E_DOWN, &pf->state);
8070
8071         /* In case of MSIX we are going to setup the misc vector right here
8072          * to handle admin queue events etc. In case of legacy and MSI
8073          * the misc functionality and queue processing is combined in
8074          * the same vector and that gets setup at open.
8075          */
8076         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
8077                 err = i40e_setup_misc_vector(pf);
8078                 if (err) {
8079                         dev_info(&pdev->dev,
8080                                  "setup of misc vector failed: %d\n", err);
8081                         goto err_vsis;
8082                 }
8083         }
8084
8085         /* prep for VF support */
8086         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
8087             (pf->flags & I40E_FLAG_MSIX_ENABLED)) {
8088                 u32 val;
8089
8090                 /* disable link interrupts for VFs */
8091                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
8092                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
8093                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
8094                 i40e_flush(hw);
8095
8096                 if (pci_num_vf(pdev)) {
8097                         dev_info(&pdev->dev,
8098                                  "Active VFs found, allocating resources.\n");
8099                         err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
8100                         if (err)
8101                                 dev_info(&pdev->dev,
8102                                          "Error %d allocating resources for existing VFs\n",
8103                                          err);
8104                 }
8105         }
8106
8107         pfs_found++;
8108
8109         i40e_dbg_pf_init(pf);
8110
8111         /* tell the firmware that we're starting */
8112         dv.major_version = DRV_VERSION_MAJOR;
8113         dv.minor_version = DRV_VERSION_MINOR;
8114         dv.build_version = DRV_VERSION_BUILD;
8115         dv.subbuild_version = 0;
8116         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
8117
8118         /* since everything's happy, start the service_task timer */
8119         mod_timer(&pf->service_timer,
8120                   round_jiffies(jiffies + pf->service_timer_period));
8121
8122         /* Get the negotiated link width and speed from PCI config space */
8123         pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA, &link_status);
8124
8125         i40e_set_pci_config_data(hw, link_status);
8126
8127         dev_info(&pdev->dev, "PCI-Express: %s %s\n",
8128                 (hw->bus.speed == i40e_bus_speed_8000 ? "Speed 8.0GT/s" :
8129                  hw->bus.speed == i40e_bus_speed_5000 ? "Speed 5.0GT/s" :
8130                  hw->bus.speed == i40e_bus_speed_2500 ? "Speed 2.5GT/s" :
8131                  "Unknown"),
8132                 (hw->bus.width == i40e_bus_width_pcie_x8 ? "Width x8" :
8133                  hw->bus.width == i40e_bus_width_pcie_x4 ? "Width x4" :
8134                  hw->bus.width == i40e_bus_width_pcie_x2 ? "Width x2" :
8135                  hw->bus.width == i40e_bus_width_pcie_x1 ? "Width x1" :
8136                  "Unknown"));
8137
8138         if (hw->bus.width < i40e_bus_width_pcie_x8 ||
8139             hw->bus.speed < i40e_bus_speed_8000) {
8140                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
8141                 dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
8142         }
8143
8144         return 0;
8145
8146         /* Unwind what we've done if something failed in the setup */
8147 err_vsis:
8148         set_bit(__I40E_DOWN, &pf->state);
8149         i40e_clear_interrupt_scheme(pf);
8150         kfree(pf->vsi);
8151 err_switch_setup:
8152         i40e_reset_interrupt_capability(pf);
8153         del_timer_sync(&pf->service_timer);
8154 #ifdef CONFIG_I40E_DCB
8155 err_init_dcb:
8156 #endif /* CONFIG_I40E_DCB */
8157 err_mac_addr:
8158 err_configure_lan_hmc:
8159         (void)i40e_shutdown_lan_hmc(hw);
8160 err_init_lan_hmc:
8161         kfree(pf->qp_pile);
8162         kfree(pf->irq_pile);
8163 err_sw_init:
8164 err_adminq_setup:
8165         (void)i40e_shutdown_adminq(hw);
8166 err_pf_reset:
8167         iounmap(hw->hw_addr);
8168 err_ioremap:
8169         kfree(pf);
8170 err_pf_alloc:
8171         pci_disable_pcie_error_reporting(pdev);
8172         pci_release_selected_regions(pdev,
8173                                      pci_select_bars(pdev, IORESOURCE_MEM));
8174 err_pci_reg:
8175 err_dma:
8176         pci_disable_device(pdev);
8177         return err;
8178 }
8179
8180 /**
8181  * i40e_remove - Device removal routine
8182  * @pdev: PCI device information struct
8183  *
8184  * i40e_remove is called by the PCI subsystem to alert the driver
8185  * that is should release a PCI device.  This could be caused by a
8186  * Hot-Plug event, or because the driver is going to be removed from
8187  * memory.
8188  **/
8189 static void i40e_remove(struct pci_dev *pdev)
8190 {
8191         struct i40e_pf *pf = pci_get_drvdata(pdev);
8192         i40e_status ret_code;
8193         u32 reg;
8194         int i;
8195
8196         i40e_dbg_pf_exit(pf);
8197
8198         i40e_ptp_stop(pf);
8199
8200         /* no more scheduling of any task */
8201         set_bit(__I40E_DOWN, &pf->state);
8202         del_timer_sync(&pf->service_timer);
8203         cancel_work_sync(&pf->service_task);
8204
8205         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
8206                 i40e_free_vfs(pf);
8207                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
8208         }
8209
8210         i40e_fdir_teardown(pf);
8211
8212         /* If there is a switch structure or any orphans, remove them.
8213          * This will leave only the PF's VSI remaining.
8214          */
8215         for (i = 0; i < I40E_MAX_VEB; i++) {
8216                 if (!pf->veb[i])
8217                         continue;
8218
8219                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
8220                     pf->veb[i]->uplink_seid == 0)
8221                         i40e_switch_branch_release(pf->veb[i]);
8222         }
8223
8224         /* Now we can shutdown the PF's VSI, just before we kill
8225          * adminq and hmc.
8226          */
8227         if (pf->vsi[pf->lan_vsi])
8228                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
8229
8230         i40e_stop_misc_vector(pf);
8231         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
8232                 synchronize_irq(pf->msix_entries[0].vector);
8233                 free_irq(pf->msix_entries[0].vector, pf);
8234         }
8235
8236         /* shutdown and destroy the HMC */
8237         ret_code = i40e_shutdown_lan_hmc(&pf->hw);
8238         if (ret_code)
8239                 dev_warn(&pdev->dev,
8240                          "Failed to destroy the HMC resources: %d\n", ret_code);
8241
8242         /* shutdown the adminq */
8243         ret_code = i40e_shutdown_adminq(&pf->hw);
8244         if (ret_code)
8245                 dev_warn(&pdev->dev,
8246                          "Failed to destroy the Admin Queue resources: %d\n",
8247                          ret_code);
8248
8249         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
8250         i40e_clear_interrupt_scheme(pf);
8251         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
8252                 if (pf->vsi[i]) {
8253                         i40e_vsi_clear_rings(pf->vsi[i]);
8254                         i40e_vsi_clear(pf->vsi[i]);
8255                         pf->vsi[i] = NULL;
8256                 }
8257         }
8258
8259         for (i = 0; i < I40E_MAX_VEB; i++) {
8260                 kfree(pf->veb[i]);
8261                 pf->veb[i] = NULL;
8262         }
8263
8264         kfree(pf->qp_pile);
8265         kfree(pf->irq_pile);
8266         kfree(pf->sw_config);
8267         kfree(pf->vsi);
8268
8269         /* force a PF reset to clean anything leftover */
8270         reg = rd32(&pf->hw, I40E_PFGEN_CTRL);
8271         wr32(&pf->hw, I40E_PFGEN_CTRL, (reg | I40E_PFGEN_CTRL_PFSWR_MASK));
8272         i40e_flush(&pf->hw);
8273
8274         iounmap(pf->hw.hw_addr);
8275         kfree(pf);
8276         pci_release_selected_regions(pdev,
8277                                      pci_select_bars(pdev, IORESOURCE_MEM));
8278
8279         pci_disable_pcie_error_reporting(pdev);
8280         pci_disable_device(pdev);
8281 }
8282
8283 /**
8284  * i40e_pci_error_detected - warning that something funky happened in PCI land
8285  * @pdev: PCI device information struct
8286  *
8287  * Called to warn that something happened and the error handling steps
8288  * are in progress.  Allows the driver to quiesce things, be ready for
8289  * remediation.
8290  **/
8291 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
8292                                                 enum pci_channel_state error)
8293 {
8294         struct i40e_pf *pf = pci_get_drvdata(pdev);
8295
8296         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
8297
8298         /* shutdown all operations */
8299         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
8300                 rtnl_lock();
8301                 i40e_prep_for_reset(pf);
8302                 rtnl_unlock();
8303         }
8304
8305         /* Request a slot reset */
8306         return PCI_ERS_RESULT_NEED_RESET;
8307 }
8308
8309 /**
8310  * i40e_pci_error_slot_reset - a PCI slot reset just happened
8311  * @pdev: PCI device information struct
8312  *
8313  * Called to find if the driver can work with the device now that
8314  * the pci slot has been reset.  If a basic connection seems good
8315  * (registers are readable and have sane content) then return a
8316  * happy little PCI_ERS_RESULT_xxx.
8317  **/
8318 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
8319 {
8320         struct i40e_pf *pf = pci_get_drvdata(pdev);
8321         pci_ers_result_t result;
8322         int err;
8323         u32 reg;
8324
8325         dev_info(&pdev->dev, "%s\n", __func__);
8326         if (pci_enable_device_mem(pdev)) {
8327                 dev_info(&pdev->dev,
8328                          "Cannot re-enable PCI device after reset.\n");
8329                 result = PCI_ERS_RESULT_DISCONNECT;
8330         } else {
8331                 pci_set_master(pdev);
8332                 pci_restore_state(pdev);
8333                 pci_save_state(pdev);
8334                 pci_wake_from_d3(pdev, false);
8335
8336                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
8337                 if (reg == 0)
8338                         result = PCI_ERS_RESULT_RECOVERED;
8339                 else
8340                         result = PCI_ERS_RESULT_DISCONNECT;
8341         }
8342
8343         err = pci_cleanup_aer_uncorrect_error_status(pdev);
8344         if (err) {
8345                 dev_info(&pdev->dev,
8346                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
8347                          err);
8348                 /* non-fatal, continue */
8349         }
8350
8351         return result;
8352 }
8353
8354 /**
8355  * i40e_pci_error_resume - restart operations after PCI error recovery
8356  * @pdev: PCI device information struct
8357  *
8358  * Called to allow the driver to bring things back up after PCI error
8359  * and/or reset recovery has finished.
8360  **/
8361 static void i40e_pci_error_resume(struct pci_dev *pdev)
8362 {
8363         struct i40e_pf *pf = pci_get_drvdata(pdev);
8364
8365         dev_info(&pdev->dev, "%s\n", __func__);
8366         if (test_bit(__I40E_SUSPENDED, &pf->state))
8367                 return;
8368
8369         rtnl_lock();
8370         i40e_handle_reset_warning(pf);
8371         rtnl_lock();
8372 }
8373
8374 /**
8375  * i40e_shutdown - PCI callback for shutting down
8376  * @pdev: PCI device information struct
8377  **/
8378 static void i40e_shutdown(struct pci_dev *pdev)
8379 {
8380         struct i40e_pf *pf = pci_get_drvdata(pdev);
8381         struct i40e_hw *hw = &pf->hw;
8382
8383         set_bit(__I40E_SUSPENDED, &pf->state);
8384         set_bit(__I40E_DOWN, &pf->state);
8385         rtnl_lock();
8386         i40e_prep_for_reset(pf);
8387         rtnl_unlock();
8388
8389         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
8390         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
8391
8392         if (system_state == SYSTEM_POWER_OFF) {
8393                 pci_wake_from_d3(pdev, pf->wol_en);
8394                 pci_set_power_state(pdev, PCI_D3hot);
8395         }
8396 }
8397
8398 #ifdef CONFIG_PM
8399 /**
8400  * i40e_suspend - PCI callback for moving to D3
8401  * @pdev: PCI device information struct
8402  **/
8403 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
8404 {
8405         struct i40e_pf *pf = pci_get_drvdata(pdev);
8406         struct i40e_hw *hw = &pf->hw;
8407
8408         set_bit(__I40E_SUSPENDED, &pf->state);
8409         set_bit(__I40E_DOWN, &pf->state);
8410         rtnl_lock();
8411         i40e_prep_for_reset(pf);
8412         rtnl_unlock();
8413
8414         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
8415         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
8416
8417         pci_wake_from_d3(pdev, pf->wol_en);
8418         pci_set_power_state(pdev, PCI_D3hot);
8419
8420         return 0;
8421 }
8422
8423 /**
8424  * i40e_resume - PCI callback for waking up from D3
8425  * @pdev: PCI device information struct
8426  **/
8427 static int i40e_resume(struct pci_dev *pdev)
8428 {
8429         struct i40e_pf *pf = pci_get_drvdata(pdev);
8430         u32 err;
8431
8432         pci_set_power_state(pdev, PCI_D0);
8433         pci_restore_state(pdev);
8434         /* pci_restore_state() clears dev->state_saves, so
8435          * call pci_save_state() again to restore it.
8436          */
8437         pci_save_state(pdev);
8438
8439         err = pci_enable_device_mem(pdev);
8440         if (err) {
8441                 dev_err(&pdev->dev,
8442                         "%s: Cannot enable PCI device from suspend\n",
8443                         __func__);
8444                 return err;
8445         }
8446         pci_set_master(pdev);
8447
8448         /* no wakeup events while running */
8449         pci_wake_from_d3(pdev, false);
8450
8451         /* handling the reset will rebuild the device state */
8452         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
8453                 clear_bit(__I40E_DOWN, &pf->state);
8454                 rtnl_lock();
8455                 i40e_reset_and_rebuild(pf, false);
8456                 rtnl_unlock();
8457         }
8458
8459         return 0;
8460 }
8461
8462 #endif
8463 static const struct pci_error_handlers i40e_err_handler = {
8464         .error_detected = i40e_pci_error_detected,
8465         .slot_reset = i40e_pci_error_slot_reset,
8466         .resume = i40e_pci_error_resume,
8467 };
8468
8469 static struct pci_driver i40e_driver = {
8470         .name     = i40e_driver_name,
8471         .id_table = i40e_pci_tbl,
8472         .probe    = i40e_probe,
8473         .remove   = i40e_remove,
8474 #ifdef CONFIG_PM
8475         .suspend  = i40e_suspend,
8476         .resume   = i40e_resume,
8477 #endif
8478         .shutdown = i40e_shutdown,
8479         .err_handler = &i40e_err_handler,
8480         .sriov_configure = i40e_pci_sriov_configure,
8481 };
8482
8483 /**
8484  * i40e_init_module - Driver registration routine
8485  *
8486  * i40e_init_module is the first routine called when the driver is
8487  * loaded. All it does is register with the PCI subsystem.
8488  **/
8489 static int __init i40e_init_module(void)
8490 {
8491         pr_info("%s: %s - version %s\n", i40e_driver_name,
8492                 i40e_driver_string, i40e_driver_version_str);
8493         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
8494         i40e_dbg_init();
8495         return pci_register_driver(&i40e_driver);
8496 }
8497 module_init(i40e_init_module);
8498
8499 /**
8500  * i40e_exit_module - Driver exit cleanup routine
8501  *
8502  * i40e_exit_module is called just before the driver is removed
8503  * from memory.
8504  **/
8505 static void __exit i40e_exit_module(void)
8506 {
8507         pci_unregister_driver(&i40e_driver);
8508         i40e_dbg_exit();
8509 }
8510 module_exit(i40e_exit_module);