drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2012 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 with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28
  29 /******************************************************************************
  30  Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
  31 ******************************************************************************/
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/types.h>
  36 #include <linux/bitops.h>
  37 #include <linux/module.h>
  38 #include <linux/pci.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/string.h>
  42 #include <linux/in.h>
  43 #include <linux/ip.h>
  44 #include <linux/tcp.h>
  45 #include <linux/sctp.h>
  46 #include <linux/ipv6.h>
  47 #include <linux/slab.h>
  48 #include <net/checksum.h>
  49 #include <net/ip6_checksum.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/if.h>
  52 #include <linux/if_vlan.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "ixgbevf.h"
  56
  57 const char ixgbevf_driver_name[] = "ixgbevf";
  58 static const char ixgbevf_driver_string[] =
  59         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  60
  61 #define DRV_VERSION "2.7.12-k"
  62 const char ixgbevf_driver_version[] = DRV_VERSION;
  63 static char ixgbevf_copyright[] =
  64         "Copyright (c) 2009 - 2012 Intel Corporation.";
  65
  66 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  67         [board_82599_vf] = &ixgbevf_82599_vf_info,
  68         [board_X540_vf]  = &ixgbevf_X540_vf_info,
  69 };
  70
  71 /* ixgbevf_pci_tbl - PCI Device ID Table
  72  *
  73  * Wildcard entries (PCI_ANY_ID) should come last
  74  * Last entry must be all 0s
  75  *
  76  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  77  *   Class, Class Mask, private data (not used) }
  78  */
  79 static DEFINE_PCI_DEVICE_TABLE(ixgbevf_pci_tbl) = {
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  81         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  82         /* required last entry */
  83         {0, }
  84 };
  85 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  86
  87 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  88 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
  89 MODULE_LICENSE("GPL");
  90 MODULE_VERSION(DRV_VERSION);
  91
  92 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  93 static int debug = -1;
  94 module_param(debug, int, 0);
  95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  96
  97 /* forward decls */
  98 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
  99 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 100
 101 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
 102                                            struct ixgbevf_ring *rx_ring,
 103                                            u32 val)
 104 {
 105         /*
 106          * Force memory writes to complete before letting h/w
 107          * know there are new descriptors to fetch.  (Only
 108          * applicable for weak-ordered memory model archs,
 109          * such as IA-64).
 110          */
 111         wmb();
 112         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 113 }
 114
 115 /**
 116  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 117  * @adapter: pointer to adapter struct
 118  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 119  * @queue: queue to map the corresponding interrupt to
 120  * @msix_vector: the vector to map to the corresponding queue
 121  */
 122 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 123                              u8 queue, u8 msix_vector)
 124 {
 125         u32 ivar, index;
 126         struct ixgbe_hw *hw = &adapter->hw;
 127         if (direction == -1) {
 128                 /* other causes */
 129                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 130                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 131                 ivar &= ~0xFF;
 132                 ivar |= msix_vector;
 133                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 134         } else {
 135                 /* tx or rx causes */
 136                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 137                 index = ((16 * (queue & 1)) + (8 * direction));
 138                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 139                 ivar &= ~(0xFF << index);
 140                 ivar |= (msix_vector << index);
 141                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 142         }
 143 }
 144
 145 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
 146                                                struct ixgbevf_tx_buffer
 147                                                *tx_buffer_info)
 148 {
 149         if (tx_buffer_info->dma) {
 150                 if (tx_buffer_info->mapped_as_page)
 151                         dma_unmap_page(tx_ring->dev,
 152                                        tx_buffer_info->dma,
 153                                        tx_buffer_info->length,
 154                                        DMA_TO_DEVICE);
 155                 else
 156                         dma_unmap_single(tx_ring->dev,
 157                                          tx_buffer_info->dma,
 158                                          tx_buffer_info->length,
 159                                          DMA_TO_DEVICE);
 160                 tx_buffer_info->dma = 0;
 161         }
 162         if (tx_buffer_info->skb) {
 163                 dev_kfree_skb_any(tx_buffer_info->skb);
 164                 tx_buffer_info->skb = NULL;
 165         }
 166         tx_buffer_info->time_stamp = 0;
 167         /* tx_buffer_info must be completely set up in the transmit path */
 168 }
 169
 170 #define IXGBE_MAX_TXD_PWR       14
 171 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 172
 173 /* Tx Descriptors needed, worst case */
 174 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
 175 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
 176
 177 static void ixgbevf_tx_timeout(struct net_device *netdev);
 178
 179 /**
 180  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 181  * @q_vector: board private structure
 182  * @tx_ring: tx ring to clean
 183  **/
 184 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 185                                  struct ixgbevf_ring *tx_ring)
 186 {
 187         struct ixgbevf_adapter *adapter = q_vector->adapter;
 188         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 189         struct ixgbevf_tx_buffer *tx_buffer_info;
 190         unsigned int i, count = 0;
 191         unsigned int total_bytes = 0, total_packets = 0;
 192
 193         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 194                 return true;
 195
 196         i = tx_ring->next_to_clean;
 197         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 198         eop_desc = tx_buffer_info->next_to_watch;
 199
 200         do {
 201                 bool cleaned = false;
 202
 203                 /* if next_to_watch is not set then there is no work pending */
 204                 if (!eop_desc)
 205                         break;
 206
 207                 /* prevent any other reads prior to eop_desc */
 208                 read_barrier_depends();
 209
 210                 /* if DD is not set pending work has not been completed */
 211                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 212                         break;
 213
 214                 /* clear next_to_watch to prevent false hangs */
 215                 tx_buffer_info->next_to_watch = NULL;
 216
 217                 for ( ; !cleaned; count++) {
 218                         struct sk_buff *skb;
 219                         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 220                         cleaned = (tx_desc == eop_desc);
 221                         skb = tx_buffer_info->skb;
 222
 223                         if (cleaned && skb) {
 224                                 unsigned int segs, bytecount;
 225
 226                                 /* gso_segs is currently only valid for tcp */
 227                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 228                                 /* multiply data chunks by size of headers */
 229                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 230                                             skb->len;
 231                                 total_packets += segs;
 232                                 total_bytes += bytecount;
 233                         }
 234
 235                         ixgbevf_unmap_and_free_tx_resource(tx_ring,
 236                                                            tx_buffer_info);
 237
 238                         tx_desc->wb.status = 0;
 239
 240                         i++;
 241                         if (i == tx_ring->count)
 242                                 i = 0;
 243
 244                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 245                 }
 246
 247                 eop_desc = tx_buffer_info->next_to_watch;
 248         } while (count < tx_ring->count);
 249
 250         tx_ring->next_to_clean = i;
 251
 252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 253         if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
 254                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 255                 /* Make sure that anybody stopping the queue after this
 256                  * sees the new next_to_clean.
 257                  */
 258                 smp_mb();
 259                 if (__netif_subqueue_stopped(tx_ring->netdev,
 260                                              tx_ring->queue_index) &&
 261                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 262                         netif_wake_subqueue(tx_ring->netdev,
 263                                             tx_ring->queue_index);
 264                         ++adapter->restart_queue;
 265                 }
 266         }
 267
 268         u64_stats_update_begin(&tx_ring->syncp);
 269         tx_ring->total_bytes += total_bytes;
 270         tx_ring->total_packets += total_packets;
 271         u64_stats_update_end(&tx_ring->syncp);
 272         q_vector->tx.total_bytes += total_bytes;
 273         q_vector->tx.total_packets += total_packets;
 274
 275         return count < tx_ring->count;
 276 }
 277
 278 /**
 279  * ixgbevf_receive_skb - Send a completed packet up the stack
 280  * @q_vector: structure containing interrupt and ring information
 281  * @skb: packet to send up
 282  * @status: hardware indication of status of receive
 283  * @rx_desc: rx descriptor
 284  **/
 285 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
 286                                 struct sk_buff *skb, u8 status,
 287                                 union ixgbe_adv_rx_desc *rx_desc)
 288 {
 289         struct ixgbevf_adapter *adapter = q_vector->adapter;
 290         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 291         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 292
 293         if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
 294                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
 295
 296         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
 297                 napi_gro_receive(&q_vector->napi, skb);
 298         else
 299                 netif_rx(skb);
 300 }
 301
 302 /**
 303  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 304  * @ring: pointer to Rx descriptor ring structure
 305  * @status_err: hardware indication of status of receive
 306  * @skb: skb currently being received and modified
 307  **/
 308 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 309                                        u32 status_err, struct sk_buff *skb)
 310 {
 311         skb_checksum_none_assert(skb);
 312
 313         /* Rx csum disabled */
 314         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 315                 return;
 316
 317         /* if IP and error */
 318         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 319             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 320                 ring->hw_csum_rx_error++;
 321                 return;
 322         }
 323
 324         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 325                 return;
 326
 327         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 328                 ring->hw_csum_rx_error++;
 329                 return;
 330         }
 331
 332         /* It must be a TCP or UDP packet with a valid checksum */
 333         skb->ip_summed = CHECKSUM_UNNECESSARY;
 334         ring->hw_csum_rx_good++;
 335 }
 336
 337 /**
 338  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 339  * @adapter: address of board private structure
 340  **/
 341 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 342                                      struct ixgbevf_ring *rx_ring,
 343                                      int cleaned_count)
 344 {
 345         struct pci_dev *pdev = adapter->pdev;
 346         union ixgbe_adv_rx_desc *rx_desc;
 347         struct ixgbevf_rx_buffer *bi;
 348         unsigned int i = rx_ring->next_to_use;
 349
 350         bi = &rx_ring->rx_buffer_info[i];
 351
 352         while (cleaned_count--) {
 353                 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 354
 355                 if (!bi->skb) {
 356                         struct sk_buff *skb;
 357
 358                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 359                                                         rx_ring->rx_buf_len);
 360                         if (!skb) {
 361                                 adapter->alloc_rx_buff_failed++;
 362                                 goto no_buffers;
 363                         }
 364                         bi->skb = skb;
 365
 366                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 367                                                  rx_ring->rx_buf_len,
 368                                                  DMA_FROM_DEVICE);
 369                         if (dma_mapping_error(&pdev->dev, bi->dma)) {
 370                                 dev_kfree_skb(skb);
 371                                 bi->skb = NULL;
 372                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 373                                 break;
 374                         }
 375                 }
 376                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 377
 378                 i++;
 379                 if (i == rx_ring->count)
 380                         i = 0;
 381                 bi = &rx_ring->rx_buffer_info[i];
 382         }
 383
 384 no_buffers:
 385         if (rx_ring->next_to_use != i) {
 386                 rx_ring->next_to_use = i;
 387                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 388         }
 389 }
 390
 391 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 392                                              u32 qmask)
 393 {
 394         struct ixgbe_hw *hw = &adapter->hw;
 395
 396         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 397 }
 398
 399 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 400                                  struct ixgbevf_ring *rx_ring,
 401                                  int budget)
 402 {
 403         struct ixgbevf_adapter *adapter = q_vector->adapter;
 404         struct pci_dev *pdev = adapter->pdev;
 405         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 406         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 407         struct sk_buff *skb;
 408         unsigned int i;
 409         u32 len, staterr;
 410         int cleaned_count = 0;
 411         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 412
 413         i = rx_ring->next_to_clean;
 414         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 415         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 416         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 417
 418         while (staterr & IXGBE_RXD_STAT_DD) {
 419                 if (!budget)
 420                         break;
 421                 budget--;
 422
 423                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 424                 len = le16_to_cpu(rx_desc->wb.upper.length);
 425                 skb = rx_buffer_info->skb;
 426                 prefetch(skb->data - NET_IP_ALIGN);
 427                 rx_buffer_info->skb = NULL;
 428
 429                 if (rx_buffer_info->dma) {
 430                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 431                                          rx_ring->rx_buf_len,
 432                                          DMA_FROM_DEVICE);
 433                         rx_buffer_info->dma = 0;
 434                         skb_put(skb, len);
 435                 }
 436
 437                 i++;
 438                 if (i == rx_ring->count)
 439                         i = 0;
 440
 441                 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
 442                 prefetch(next_rxd);
 443                 cleaned_count++;
 444
 445                 next_buffer = &rx_ring->rx_buffer_info[i];
 446
 447                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 448                         skb->next = next_buffer->skb;
 449                         IXGBE_CB(skb->next)->prev = skb;
 450                         adapter->non_eop_descs++;
 451                         goto next_desc;
 452                 }
 453
 454                 /* we should not be chaining buffers, if we did drop the skb */
 455                 if (IXGBE_CB(skb)->prev) {
 456                         do {
 457                                 struct sk_buff *this = skb;
 458                                 skb = IXGBE_CB(skb)->prev;
 459                                 dev_kfree_skb(this);
 460                         } while (skb);
 461                         goto next_desc;
 462                 }
 463
 464                 /* ERR_MASK will only have valid bits if EOP set */
 465                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 466                         dev_kfree_skb_irq(skb);
 467                         goto next_desc;
 468                 }
 469
 470                 ixgbevf_rx_checksum(rx_ring, staterr, skb);
 471
 472                 /* probably a little skewed due to removing CRC */
 473                 total_rx_bytes += skb->len;
 474                 total_rx_packets++;
 475
 476                 /*
 477                  * Work around issue of some types of VM to VM loop back
 478                  * packets not getting split correctly
 479                  */
 480                 if (staterr & IXGBE_RXD_STAT_LB) {
 481                         u32 header_fixup_len = skb_headlen(skb);
 482                         if (header_fixup_len < 14)
 483                                 skb_push(skb, header_fixup_len);
 484                 }
 485                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 486
 487                 /* Workaround hardware that can't do proper VEPA multicast
 488                  * source pruning.
 489                  */
 490                 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
 491                     ether_addr_equal(adapter->netdev->dev_addr,
 492                                      eth_hdr(skb)->h_source)) {
 493                         dev_kfree_skb_irq(skb);
 494                         goto next_desc;
 495                 }
 496
 497                 ixgbevf_receive_skb(q_vector, skb, staterr, rx_desc);
 498
 499 next_desc:
 500                 rx_desc->wb.upper.status_error = 0;
 501
 502                 /* return some buffers to hardware, one at a time is too slow */
 503                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 504                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 505                                                  cleaned_count);
 506                         cleaned_count = 0;
 507                 }
 508
 509                 /* use prefetched values */
 510                 rx_desc = next_rxd;
 511                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 512
 513                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 514         }
 515
 516         rx_ring->next_to_clean = i;
 517         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 518
 519         if (cleaned_count)
 520                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 521
 522         u64_stats_update_begin(&rx_ring->syncp);
 523         rx_ring->total_packets += total_rx_packets;
 524         rx_ring->total_bytes += total_rx_bytes;
 525         u64_stats_update_end(&rx_ring->syncp);
 526         q_vector->rx.total_packets += total_rx_packets;
 527         q_vector->rx.total_bytes += total_rx_bytes;
 528
 529         return !!budget;
 530 }
 531
 532 /**
 533  * ixgbevf_poll - NAPI polling calback
 534  * @napi: napi struct with our devices info in it
 535  * @budget: amount of work driver is allowed to do this pass, in packets
 536  *
 537  * This function will clean more than one or more rings associated with a
 538  * q_vector.
 539  **/
 540 static int ixgbevf_poll(struct napi_struct *napi, int budget)
 541 {
 542         struct ixgbevf_q_vector *q_vector =
 543                 container_of(napi, struct ixgbevf_q_vector, napi);
 544         struct ixgbevf_adapter *adapter = q_vector->adapter;
 545         struct ixgbevf_ring *ring;
 546         int per_ring_budget;
 547         bool clean_complete = true;
 548
 549         ixgbevf_for_each_ring(ring, q_vector->tx)
 550                 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
 551
 552         /* attempt to distribute budget to each queue fairly, but don't allow
 553          * the budget to go below 1 because we'll exit polling */
 554         if (q_vector->rx.count > 1)
 555                 per_ring_budget = max(budget/q_vector->rx.count, 1);
 556         else
 557                 per_ring_budget = budget;
 558
 559         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
 560         ixgbevf_for_each_ring(ring, q_vector->rx)
 561                 clean_complete &= ixgbevf_clean_rx_irq(q_vector, ring,
 562                                                        per_ring_budget);
 563         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
 564
 565         /* If all work not completed, return budget and keep polling */
 566         if (!clean_complete)
 567                 return budget;
 568         /* all work done, exit the polling mode */
 569         napi_complete(napi);
 570         if (adapter->rx_itr_setting & 1)
 571                 ixgbevf_set_itr(q_vector);
 572         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 573                 ixgbevf_irq_enable_queues(adapter,
 574                                           1 << q_vector->v_idx);
 575
 576         return 0;
 577 }
 578
 579 /**
 580  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 581  * @q_vector: structure containing interrupt and ring information
 582  */
 583 static void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
 584 {
 585         struct ixgbevf_adapter *adapter = q_vector->adapter;
 586         struct ixgbe_hw *hw = &adapter->hw;
 587         int v_idx = q_vector->v_idx;
 588         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
 589
 590         /*
 591          * set the WDIS bit to not clear the timer bits and cause an
 592          * immediate assertion of the interrupt
 593          */
 594         itr_reg |= IXGBE_EITR_CNT_WDIS;
 595
 596         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 597 }
 598
 599 /**
 600  * ixgbevf_configure_msix - Configure MSI-X hardware
 601  * @adapter: board private structure
 602  *
 603  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 604  * interrupts.
 605  **/
 606 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 607 {
 608         struct ixgbevf_q_vector *q_vector;
 609         int q_vectors, v_idx;
 610
 611         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 612         adapter->eims_enable_mask = 0;
 613
 614         /*
 615          * Populate the IVAR table and set the ITR values to the
 616          * corresponding register.
 617          */
 618         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 619                 struct ixgbevf_ring *ring;
 620                 q_vector = adapter->q_vector[v_idx];
 621
 622                 ixgbevf_for_each_ring(ring, q_vector->rx)
 623                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
 624
 625                 ixgbevf_for_each_ring(ring, q_vector->tx)
 626                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
 627
 628                 if (q_vector->tx.ring && !q_vector->rx.ring) {
 629                         /* tx only vector */
 630                         if (adapter->tx_itr_setting == 1)
 631                                 q_vector->itr = IXGBE_10K_ITR;
 632                         else
 633                                 q_vector->itr = adapter->tx_itr_setting;
 634                 } else {
 635                         /* rx or rx/tx vector */
 636                         if (adapter->rx_itr_setting == 1)
 637                                 q_vector->itr = IXGBE_20K_ITR;
 638                         else
 639                                 q_vector->itr = adapter->rx_itr_setting;
 640                 }
 641
 642                 /* add q_vector eims value to global eims_enable_mask */
 643                 adapter->eims_enable_mask |= 1 << v_idx;
 644
 645                 ixgbevf_write_eitr(q_vector);
 646         }
 647
 648         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 649         /* setup eims_other and add value to global eims_enable_mask */
 650         adapter->eims_other = 1 << v_idx;
 651         adapter->eims_enable_mask |= adapter->eims_other;
 652 }
 653
 654 enum latency_range {
 655         lowest_latency = 0,
 656         low_latency = 1,
 657         bulk_latency = 2,
 658         latency_invalid = 255
 659 };
 660
 661 /**
 662  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 663  * @q_vector: structure containing interrupt and ring information
 664  * @ring_container: structure containing ring performance data
 665  *
 666  *      Stores a new ITR value based on packets and byte
 667  *      counts during the last interrupt.  The advantage of per interrupt
 668  *      computation is faster updates and more accurate ITR for the current
 669  *      traffic pattern.  Constants in this function were computed
 670  *      based on theoretical maximum wire speed and thresholds were set based
 671  *      on testing data as well as attempting to minimize response time
 672  *      while increasing bulk throughput.
 673  **/
 674 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
 675                                struct ixgbevf_ring_container *ring_container)
 676 {
 677         int bytes = ring_container->total_bytes;
 678         int packets = ring_container->total_packets;
 679         u32 timepassed_us;
 680         u64 bytes_perint;
 681         u8 itr_setting = ring_container->itr;
 682
 683         if (packets == 0)
 684                 return;
 685
 686         /* simple throttlerate management
 687          *    0-20MB/s lowest (100000 ints/s)
 688          *   20-100MB/s low   (20000 ints/s)
 689          *  100-1249MB/s bulk (8000 ints/s)
 690          */
 691         /* what was last interrupt timeslice? */
 692         timepassed_us = q_vector->itr >> 2;
 693         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 694
 695         switch (itr_setting) {
 696         case lowest_latency:
 697                 if (bytes_perint > 10)
 698                         itr_setting = low_latency;
 699                 break;
 700         case low_latency:
 701                 if (bytes_perint > 20)
 702                         itr_setting = bulk_latency;
 703                 else if (bytes_perint <= 10)
 704                         itr_setting = lowest_latency;
 705                 break;
 706         case bulk_latency:
 707                 if (bytes_perint <= 20)
 708                         itr_setting = low_latency;
 709                 break;
 710         }
 711
 712         /* clear work counters since we have the values we need */
 713         ring_container->total_bytes = 0;
 714         ring_container->total_packets = 0;
 715
 716         /* write updated itr to ring container */
 717         ring_container->itr = itr_setting;
 718 }
 719
 720 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
 721 {
 722         u32 new_itr = q_vector->itr;
 723         u8 current_itr;
 724
 725         ixgbevf_update_itr(q_vector, &q_vector->tx);
 726         ixgbevf_update_itr(q_vector, &q_vector->rx);
 727
 728         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 729
 730         switch (current_itr) {
 731         /* counts and packets in update_itr are dependent on these numbers */
 732         case lowest_latency:
 733                 new_itr = IXGBE_100K_ITR;
 734                 break;
 735         case low_latency:
 736                 new_itr = IXGBE_20K_ITR;
 737                 break;
 738         case bulk_latency:
 739         default:
 740                 new_itr = IXGBE_8K_ITR;
 741                 break;
 742         }
 743
 744         if (new_itr != q_vector->itr) {
 745                 /* do an exponential smoothing */
 746                 new_itr = (10 * new_itr * q_vector->itr) /
 747                           ((9 * new_itr) + q_vector->itr);
 748
 749                 /* save the algorithm value here */
 750                 q_vector->itr = new_itr;
 751
 752                 ixgbevf_write_eitr(q_vector);
 753         }
 754 }
 755
 756 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
 757 {
 758         struct ixgbevf_adapter *adapter = data;
 759         struct ixgbe_hw *hw = &adapter->hw;
 760
 761         hw->mac.get_link_status = 1;
 762
 763         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 764                 mod_timer(&adapter->watchdog_timer, jiffies);
 765
 766         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
 767
 768         return IRQ_HANDLED;
 769 }
 770
 771 /**
 772  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
 773  * @irq: unused
 774  * @data: pointer to our q_vector struct for this interrupt vector
 775  **/
 776 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
 777 {
 778         struct ixgbevf_q_vector *q_vector = data;
 779
 780         /* EIAM disabled interrupts (on this vector) for us */
 781         if (q_vector->rx.ring || q_vector->tx.ring)
 782                 napi_schedule(&q_vector->napi);
 783
 784         return IRQ_HANDLED;
 785 }
 786
 787 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
 788                                      int r_idx)
 789 {
 790         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 791
 792         a->rx_ring[r_idx].next = q_vector->rx.ring;
 793         q_vector->rx.ring = &a->rx_ring[r_idx];
 794         q_vector->rx.count++;
 795 }
 796
 797 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
 798                                      int t_idx)
 799 {
 800         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 801
 802         a->tx_ring[t_idx].next = q_vector->tx.ring;
 803         q_vector->tx.ring = &a->tx_ring[t_idx];
 804         q_vector->tx.count++;
 805 }
 806
 807 /**
 808  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
 809  * @adapter: board private structure to initialize
 810  *
 811  * This function maps descriptor rings to the queue-specific vectors
 812  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 813  * one vector per ring/queue, but on a constrained vector budget, we
 814  * group the rings as "efficiently" as possible.  You would add new
 815  * mapping configurations in here.
 816  **/
 817 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
 818 {
 819         int q_vectors;
 820         int v_start = 0;
 821         int rxr_idx = 0, txr_idx = 0;
 822         int rxr_remaining = adapter->num_rx_queues;
 823         int txr_remaining = adapter->num_tx_queues;
 824         int i, j;
 825         int rqpv, tqpv;
 826         int err = 0;
 827
 828         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 829
 830         /*
 831          * The ideal configuration...
 832          * We have enough vectors to map one per queue.
 833          */
 834         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
 835                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 836                         map_vector_to_rxq(adapter, v_start, rxr_idx);
 837
 838                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 839                         map_vector_to_txq(adapter, v_start, txr_idx);
 840                 goto out;
 841         }
 842
 843         /*
 844          * If we don't have enough vectors for a 1-to-1
 845          * mapping, we'll have to group them so there are
 846          * multiple queues per vector.
 847          */
 848         /* Re-adjusting *qpv takes care of the remainder. */
 849         for (i = v_start; i < q_vectors; i++) {
 850                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 851                 for (j = 0; j < rqpv; j++) {
 852                         map_vector_to_rxq(adapter, i, rxr_idx);
 853                         rxr_idx++;
 854                         rxr_remaining--;
 855                 }
 856         }
 857         for (i = v_start; i < q_vectors; i++) {
 858                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 859                 for (j = 0; j < tqpv; j++) {
 860                         map_vector_to_txq(adapter, i, txr_idx);
 861                         txr_idx++;
 862                         txr_remaining--;
 863                 }
 864         }
 865
 866 out:
 867         return err;
 868 }
 869
 870 /**
 871  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
 872  * @adapter: board private structure
 873  *
 874  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
 875  * interrupts from the kernel.
 876  **/
 877 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
 878 {
 879         struct net_device *netdev = adapter->netdev;
 880         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 881         int vector, err;
 882         int ri = 0, ti = 0;
 883
 884         for (vector = 0; vector < q_vectors; vector++) {
 885                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
 886                 struct msix_entry *entry = &adapter->msix_entries[vector];
 887
 888                 if (q_vector->tx.ring && q_vector->rx.ring) {
 889                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 890                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
 891                         ti++;
 892                 } else if (q_vector->rx.ring) {
 893                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 894                                  "%s-%s-%d", netdev->name, "rx", ri++);
 895                 } else if (q_vector->tx.ring) {
 896                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 897                                  "%s-%s-%d", netdev->name, "tx", ti++);
 898                 } else {
 899                         /* skip this unused q_vector */
 900                         continue;
 901                 }
 902                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
 903                                   q_vector->name, q_vector);
 904                 if (err) {
 905                         hw_dbg(&adapter->hw,
 906                                "request_irq failed for MSIX interrupt "
 907                                "Error: %d\n", err);
 908                         goto free_queue_irqs;
 909                 }
 910         }
 911
 912         err = request_irq(adapter->msix_entries[vector].vector,
 913                           &ixgbevf_msix_other, 0, netdev->name, adapter);
 914         if (err) {
 915                 hw_dbg(&adapter->hw,
 916                        "request_irq for msix_other failed: %d\n", err);
 917                 goto free_queue_irqs;
 918         }
 919
 920         return 0;
 921
 922 free_queue_irqs:
 923         while (vector) {
 924                 vector--;
 925                 free_irq(adapter->msix_entries[vector].vector,
 926                          adapter->q_vector[vector]);
 927         }
 928         /* This failure is non-recoverable - it indicates the system is
 929          * out of MSIX vector resources and the VF driver cannot run
 930          * without them.  Set the number of msix vectors to zero
 931          * indicating that not enough can be allocated.  The error
 932          * will be returned to the user indicating device open failed.
 933          * Any further attempts to force the driver to open will also
 934          * fail.  The only way to recover is to unload the driver and
 935          * reload it again.  If the system has recovered some MSIX
 936          * vectors then it may succeed.
 937          */
 938         adapter->num_msix_vectors = 0;
 939         return err;
 940 }
 941
 942 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
 943 {
 944         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 945
 946         for (i = 0; i < q_vectors; i++) {
 947                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
 948                 q_vector->rx.ring = NULL;
 949                 q_vector->tx.ring = NULL;
 950                 q_vector->rx.count = 0;
 951                 q_vector->tx.count = 0;
 952         }
 953 }
 954
 955 /**
 956  * ixgbevf_request_irq - initialize interrupts
 957  * @adapter: board private structure
 958  *
 959  * Attempts to configure interrupts using the best available
 960  * capabilities of the hardware and kernel.
 961  **/
 962 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
 963 {
 964         int err = 0;
 965
 966         err = ixgbevf_request_msix_irqs(adapter);
 967
 968         if (err)
 969                 hw_dbg(&adapter->hw,
 970                        "request_irq failed, Error %d\n", err);
 971
 972         return err;
 973 }
 974
 975 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
 976 {
 977         int i, q_vectors;
 978
 979         q_vectors = adapter->num_msix_vectors;
 980         i = q_vectors - 1;
 981
 982         free_irq(adapter->msix_entries[i].vector, adapter);
 983         i--;
 984
 985         for (; i >= 0; i--) {
 986                 /* free only the irqs that were actually requested */
 987                 if (!adapter->q_vector[i]->rx.ring &&
 988                     !adapter->q_vector[i]->tx.ring)
 989                         continue;
 990
 991                 free_irq(adapter->msix_entries[i].vector,
 992                          adapter->q_vector[i]);
 993         }
 994
 995         ixgbevf_reset_q_vectors(adapter);
 996 }
 997
 998 /**
 999  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1000  * @adapter: board private structure
1001  **/
1002 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1003 {
1004         struct ixgbe_hw *hw = &adapter->hw;
1005         int i;
1006
1007         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1008         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1009         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1010
1011         IXGBE_WRITE_FLUSH(hw);
1012
1013         for (i = 0; i < adapter->num_msix_vectors; i++)
1014                 synchronize_irq(adapter->msix_entries[i].vector);
1015 }
1016
1017 /**
1018  * ixgbevf_irq_enable - Enable default interrupt generation settings
1019  * @adapter: board private structure
1020  **/
1021 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1022 {
1023         struct ixgbe_hw *hw = &adapter->hw;
1024
1025         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1026         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1027         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1028 }
1029
1030 /**
1031  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1032  * @adapter: board private structure
1033  *
1034  * Configure the Tx unit of the MAC after a reset.
1035  **/
1036 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1037 {
1038         u64 tdba;
1039         struct ixgbe_hw *hw = &adapter->hw;
1040         u32 i, j, tdlen, txctrl;
1041
1042         /* Setup the HW Tx Head and Tail descriptor pointers */
1043         for (i = 0; i < adapter->num_tx_queues; i++) {
1044                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1045                 j = ring->reg_idx;
1046                 tdba = ring->dma;
1047                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1048                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1049                                 (tdba & DMA_BIT_MASK(32)));
1050                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1051                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1052                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1053                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1054                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1055                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1056                 /* Disable Tx Head Writeback RO bit, since this hoses
1057                  * bookkeeping if things aren't delivered in order.
1058                  */
1059                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1060                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1061                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1062         }
1063 }
1064
1065 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1066
1067 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1068 {
1069         struct ixgbevf_ring *rx_ring;
1070         struct ixgbe_hw *hw = &adapter->hw;
1071         u32 srrctl;
1072
1073         rx_ring = &adapter->rx_ring[index];
1074
1075         srrctl = IXGBE_SRRCTL_DROP_EN;
1076
1077         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1078
1079         srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1080                   IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1081
1082         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1083 }
1084
1085 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1086 {
1087         struct ixgbe_hw *hw = &adapter->hw;
1088         struct net_device *netdev = adapter->netdev;
1089         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1090         int i;
1091         u16 rx_buf_len;
1092
1093         /* notify the PF of our intent to use this size of frame */
1094         ixgbevf_rlpml_set_vf(hw, max_frame);
1095
1096         /* PF will allow an extra 4 bytes past for vlan tagged frames */
1097         max_frame += VLAN_HLEN;
1098
1099         /*
1100          * Allocate buffer sizes that fit well into 32K and
1101          * take into account max frame size of 9.5K
1102          */
1103         if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1104             (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1105                 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1106         else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1107                 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1108         else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1109                 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1110         else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1111                 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1112         else
1113                 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1114
1115         for (i = 0; i < adapter->num_rx_queues; i++)
1116                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1117 }
1118
1119 /**
1120  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1121  * @adapter: board private structure
1122  *
1123  * Configure the Rx unit of the MAC after a reset.
1124  **/
1125 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1126 {
1127         u64 rdba;
1128         struct ixgbe_hw *hw = &adapter->hw;
1129         int i, j;
1130         u32 rdlen;
1131
1132         /* PSRTYPE must be initialized in 82599 */
1133         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1134
1135         /* set_rx_buffer_len must be called before ring initialization */
1136         ixgbevf_set_rx_buffer_len(adapter);
1137
1138         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1139         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1140          * the Base and Length of the Rx Descriptor Ring */
1141         for (i = 0; i < adapter->num_rx_queues; i++) {
1142                 rdba = adapter->rx_ring[i].dma;
1143                 j = adapter->rx_ring[i].reg_idx;
1144                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1145                                 (rdba & DMA_BIT_MASK(32)));
1146                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1147                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1148                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1149                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1150                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1151                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1152
1153                 ixgbevf_configure_srrctl(adapter, j);
1154         }
1155 }
1156
1157 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1158                                    __be16 proto, u16 vid)
1159 {
1160         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1161         struct ixgbe_hw *hw = &adapter->hw;
1162         int err;
1163
1164         spin_lock_bh(&adapter->mbx_lock);
1165
1166         /* add VID to filter table */
1167         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1168
1169         spin_unlock_bh(&adapter->mbx_lock);
1170
1171         /* translate error return types so error makes sense */
1172         if (err == IXGBE_ERR_MBX)
1173                 return -EIO;
1174
1175         if (err == IXGBE_ERR_INVALID_ARGUMENT)
1176                 return -EACCES;
1177
1178         set_bit(vid, adapter->active_vlans);
1179
1180         return err;
1181 }
1182
1183 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1184                                     __be16 proto, u16 vid)
1185 {
1186         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1187         struct ixgbe_hw *hw = &adapter->hw;
1188         int err = -EOPNOTSUPP;
1189
1190         spin_lock_bh(&adapter->mbx_lock);
1191
1192         /* remove VID from filter table */
1193         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1194
1195         spin_unlock_bh(&adapter->mbx_lock);
1196
1197         clear_bit(vid, adapter->active_vlans);
1198
1199         return err;
1200 }
1201
1202 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1203 {
1204         u16 vid;
1205
1206         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1207                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1208                                         htons(ETH_P_8021Q), vid);
1209 }
1210
1211 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1212 {
1213         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1214         struct ixgbe_hw *hw = &adapter->hw;
1215         int count = 0;
1216
1217         if ((netdev_uc_count(netdev)) > 10) {
1218                 pr_err("Too many unicast filters - No Space\n");
1219                 return -ENOSPC;
1220         }
1221
1222         if (!netdev_uc_empty(netdev)) {
1223                 struct netdev_hw_addr *ha;
1224                 netdev_for_each_uc_addr(ha, netdev) {
1225                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1226                         udelay(200);
1227                 }
1228         } else {
1229                 /*
1230                  * If the list is empty then send message to PF driver to
1231                  * clear all macvlans on this VF.
1232                  */
1233                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1234         }
1235
1236         return count;
1237 }
1238
1239 /**
1240  * ixgbevf_set_rx_mode - Multicast and unicast set
1241  * @netdev: network interface device structure
1242  *
1243  * The set_rx_method entry point is called whenever the multicast address
1244  * list, unicast address list or the network interface flags are updated.
1245  * This routine is responsible for configuring the hardware for proper
1246  * multicast mode and configuring requested unicast filters.
1247  **/
1248 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1249 {
1250         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1251         struct ixgbe_hw *hw = &adapter->hw;
1252
1253         spin_lock_bh(&adapter->mbx_lock);
1254
1255         /* reprogram multicast list */
1256         hw->mac.ops.update_mc_addr_list(hw, netdev);
1257
1258         ixgbevf_write_uc_addr_list(netdev);
1259
1260         spin_unlock_bh(&adapter->mbx_lock);
1261 }
1262
1263 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1264 {
1265         int q_idx;
1266         struct ixgbevf_q_vector *q_vector;
1267         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1268
1269         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1270                 q_vector = adapter->q_vector[q_idx];
1271                 napi_enable(&q_vector->napi);
1272         }
1273 }
1274
1275 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1276 {
1277         int q_idx;
1278         struct ixgbevf_q_vector *q_vector;
1279         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1280
1281         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1282                 q_vector = adapter->q_vector[q_idx];
1283                 napi_disable(&q_vector->napi);
1284         }
1285 }
1286
1287 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1288 {
1289         struct net_device *netdev = adapter->netdev;
1290         int i;
1291
1292         ixgbevf_set_rx_mode(netdev);
1293
1294         ixgbevf_restore_vlan(adapter);
1295
1296         ixgbevf_configure_tx(adapter);
1297         ixgbevf_configure_rx(adapter);
1298         for (i = 0; i < adapter->num_rx_queues; i++) {
1299                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1300                 ixgbevf_alloc_rx_buffers(adapter, ring,
1301                                          IXGBE_DESC_UNUSED(ring));
1302         }
1303 }
1304
1305 #define IXGBEVF_MAX_RX_DESC_POLL 10
1306 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1307                                          int rxr)
1308 {
1309         struct ixgbe_hw *hw = &adapter->hw;
1310         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1311         u32 rxdctl;
1312         int j = adapter->rx_ring[rxr].reg_idx;
1313
1314         do {
1315                 usleep_range(1000, 2000);
1316                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1317         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1318
1319         if (!wait_loop)
1320                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not set while polling\n",
1321                        rxr);
1322
1323         ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1324                                 (adapter->rx_ring[rxr].count - 1));
1325 }
1326
1327 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1328                                      struct ixgbevf_ring *ring)
1329 {
1330         struct ixgbe_hw *hw = &adapter->hw;
1331         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1332         u32 rxdctl;
1333         u8 reg_idx = ring->reg_idx;
1334
1335         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1336         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1337
1338         /* write value back with RXDCTL.ENABLE bit cleared */
1339         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1340
1341         /* the hardware may take up to 100us to really disable the rx queue */
1342         do {
1343                 udelay(10);
1344                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1345         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1346
1347         if (!wait_loop)
1348                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not cleared while polling\n",
1349                        reg_idx);
1350 }
1351
1352 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1353 {
1354         /* Only save pre-reset stats if there are some */
1355         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1356                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1357                         adapter->stats.base_vfgprc;
1358                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1359                         adapter->stats.base_vfgptc;
1360                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1361                         adapter->stats.base_vfgorc;
1362                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1363                         adapter->stats.base_vfgotc;
1364                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1365                         adapter->stats.base_vfmprc;
1366         }
1367 }
1368
1369 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1370 {
1371         struct ixgbe_hw *hw = &adapter->hw;
1372
1373         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1374         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1375         adapter->stats.last_vfgorc |=
1376                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1377         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1378         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1379         adapter->stats.last_vfgotc |=
1380                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1381         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1382
1383         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1384         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1385         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1386         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1387         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1388 }
1389
1390 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1391 {
1392         struct ixgbe_hw *hw = &adapter->hw;
1393         int api[] = { ixgbe_mbox_api_11,
1394                       ixgbe_mbox_api_10,
1395                       ixgbe_mbox_api_unknown };
1396         int err = 0, idx = 0;
1397
1398         spin_lock_bh(&adapter->mbx_lock);
1399
1400         while (api[idx] != ixgbe_mbox_api_unknown) {
1401                 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1402                 if (!err)
1403                         break;
1404                 idx++;
1405         }
1406
1407         spin_unlock_bh(&adapter->mbx_lock);
1408 }
1409
1410 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1411 {
1412         struct net_device *netdev = adapter->netdev;
1413         struct ixgbe_hw *hw = &adapter->hw;
1414         int i, j = 0;
1415         int num_rx_rings = adapter->num_rx_queues;
1416         u32 txdctl, rxdctl;
1417
1418         for (i = 0; i < adapter->num_tx_queues; i++) {
1419                 j = adapter->tx_ring[i].reg_idx;
1420                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1421                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1422                 txdctl |= (8 << 16);
1423                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1424         }
1425
1426         for (i = 0; i < adapter->num_tx_queues; i++) {
1427                 j = adapter->tx_ring[i].reg_idx;
1428                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1429                 txdctl |= IXGBE_TXDCTL_ENABLE;
1430                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1431         }
1432
1433         for (i = 0; i < num_rx_rings; i++) {
1434                 j = adapter->rx_ring[i].reg_idx;
1435                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1436                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1437                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1438                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1439                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1440                                    IXGBE_RXDCTL_RLPML_EN);
1441                 }
1442                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1443                 ixgbevf_rx_desc_queue_enable(adapter, i);
1444         }
1445
1446         ixgbevf_configure_msix(adapter);
1447
1448         spin_lock_bh(&adapter->mbx_lock);
1449
1450         if (is_valid_ether_addr(hw->mac.addr))
1451                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1452         else
1453                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1454
1455         spin_unlock_bh(&adapter->mbx_lock);
1456
1457         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1458         ixgbevf_napi_enable_all(adapter);
1459
1460         /* enable transmits */
1461         netif_tx_start_all_queues(netdev);
1462
1463         ixgbevf_save_reset_stats(adapter);
1464         ixgbevf_init_last_counter_stats(adapter);
1465
1466         hw->mac.get_link_status = 1;
1467         mod_timer(&adapter->watchdog_timer, jiffies);
1468 }
1469
1470 static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter)
1471 {
1472         struct ixgbe_hw *hw = &adapter->hw;
1473         struct ixgbevf_ring *rx_ring;
1474         unsigned int def_q = 0;
1475         unsigned int num_tcs = 0;
1476         unsigned int num_rx_queues = 1;
1477         int err, i;
1478
1479         spin_lock_bh(&adapter->mbx_lock);
1480
1481         /* fetch queue configuration from the PF */
1482         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1483
1484         spin_unlock_bh(&adapter->mbx_lock);
1485
1486         if (err)
1487                 return err;
1488
1489         if (num_tcs > 1) {
1490                 /* update default Tx ring register index */
1491                 adapter->tx_ring[0].reg_idx = def_q;
1492
1493                 /* we need as many queues as traffic classes */
1494                 num_rx_queues = num_tcs;
1495         }
1496
1497         /* nothing to do if we have the correct number of queues */
1498         if (adapter->num_rx_queues == num_rx_queues)
1499                 return 0;
1500
1501         /* allocate new rings */
1502         rx_ring = kcalloc(num_rx_queues,
1503                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
1504         if (!rx_ring)
1505                 return -ENOMEM;
1506
1507         /* setup ring fields */
1508         for (i = 0; i < num_rx_queues; i++) {
1509                 rx_ring[i].count = adapter->rx_ring_count;
1510                 rx_ring[i].queue_index = i;
1511                 rx_ring[i].reg_idx = i;
1512                 rx_ring[i].dev = &adapter->pdev->dev;
1513                 rx_ring[i].netdev = adapter->netdev;
1514
1515                 /* allocate resources on the ring */
1516                 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
1517                 if (err) {
1518                         while (i) {
1519                                 i--;
1520                                 ixgbevf_free_rx_resources(adapter, &rx_ring[i]);
1521                         }
1522                         kfree(rx_ring);
1523                         return err;
1524                 }
1525         }
1526
1527         /* free the existing rings and queues */
1528         ixgbevf_free_all_rx_resources(adapter);
1529         adapter->num_rx_queues = 0;
1530         kfree(adapter->rx_ring);
1531
1532         /* move new rings into position on the adapter struct */
1533         adapter->rx_ring = rx_ring;
1534         adapter->num_rx_queues = num_rx_queues;
1535
1536         /* reset ring to vector mapping */
1537         ixgbevf_reset_q_vectors(adapter);
1538         ixgbevf_map_rings_to_vectors(adapter);
1539
1540         return 0;
1541 }
1542
1543 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1544 {
1545         struct ixgbe_hw *hw = &adapter->hw;
1546
1547         ixgbevf_reset_queues(adapter);
1548
1549         ixgbevf_configure(adapter);
1550
1551         ixgbevf_up_complete(adapter);
1552
1553         /* clear any pending interrupts, may auto mask */
1554         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1555
1556         ixgbevf_irq_enable(adapter);
1557 }
1558
1559 /**
1560  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1561  * @adapter: board private structure
1562  * @rx_ring: ring to free buffers from
1563  **/
1564 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1565                                   struct ixgbevf_ring *rx_ring)
1566 {
1567         struct pci_dev *pdev = adapter->pdev;
1568         unsigned long size;
1569         unsigned int i;
1570
1571         if (!rx_ring->rx_buffer_info)
1572                 return;
1573
1574         /* Free all the Rx ring sk_buffs */
1575         for (i = 0; i < rx_ring->count; i++) {
1576                 struct ixgbevf_rx_buffer *rx_buffer_info;
1577
1578                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1579                 if (rx_buffer_info->dma) {
1580                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1581                                          rx_ring->rx_buf_len,
1582                                          DMA_FROM_DEVICE);
1583                         rx_buffer_info->dma = 0;
1584                 }
1585                 if (rx_buffer_info->skb) {
1586                         struct sk_buff *skb = rx_buffer_info->skb;
1587                         rx_buffer_info->skb = NULL;
1588                         do {
1589                                 struct sk_buff *this = skb;
1590                                 skb = IXGBE_CB(skb)->prev;
1591                                 dev_kfree_skb(this);
1592                         } while (skb);
1593                 }
1594         }
1595
1596         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1597         memset(rx_ring->rx_buffer_info, 0, size);
1598
1599         /* Zero out the descriptor ring */
1600         memset(rx_ring->desc, 0, rx_ring->size);
1601
1602         rx_ring->next_to_clean = 0;
1603         rx_ring->next_to_use = 0;
1604
1605         if (rx_ring->head)
1606                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1607         if (rx_ring->tail)
1608                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1609 }
1610
1611 /**
1612  * ixgbevf_clean_tx_ring - Free Tx Buffers
1613  * @adapter: board private structure
1614  * @tx_ring: ring to be cleaned
1615  **/
1616 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1617                                   struct ixgbevf_ring *tx_ring)
1618 {
1619         struct ixgbevf_tx_buffer *tx_buffer_info;
1620         unsigned long size;
1621         unsigned int i;
1622
1623         if (!tx_ring->tx_buffer_info)
1624                 return;
1625
1626         /* Free all the Tx ring sk_buffs */
1627         for (i = 0; i < tx_ring->count; i++) {
1628                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1629                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1630         }
1631
1632         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1633         memset(tx_ring->tx_buffer_info, 0, size);
1634
1635         memset(tx_ring->desc, 0, tx_ring->size);
1636
1637         tx_ring->next_to_use = 0;
1638         tx_ring->next_to_clean = 0;
1639
1640         if (tx_ring->head)
1641                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1642         if (tx_ring->tail)
1643                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1644 }
1645
1646 /**
1647  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1648  * @adapter: board private structure
1649  **/
1650 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1651 {
1652         int i;
1653
1654         for (i = 0; i < adapter->num_rx_queues; i++)
1655                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1656 }
1657
1658 /**
1659  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1660  * @adapter: board private structure
1661  **/
1662 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1663 {
1664         int i;
1665
1666         for (i = 0; i < adapter->num_tx_queues; i++)
1667                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1668 }
1669
1670 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1671 {
1672         struct net_device *netdev = adapter->netdev;
1673         struct ixgbe_hw *hw = &adapter->hw;
1674         u32 txdctl;
1675         int i, j;
1676
1677         /* signal that we are down to the interrupt handler */
1678         set_bit(__IXGBEVF_DOWN, &adapter->state);
1679
1680         /* disable all enabled rx queues */
1681         for (i = 0; i < adapter->num_rx_queues; i++)
1682                 ixgbevf_disable_rx_queue(adapter, &adapter->rx_ring[i]);
1683
1684         netif_tx_disable(netdev);
1685
1686         msleep(10);
1687
1688         netif_tx_stop_all_queues(netdev);
1689
1690         ixgbevf_irq_disable(adapter);
1691
1692         ixgbevf_napi_disable_all(adapter);
1693
1694         del_timer_sync(&adapter->watchdog_timer);
1695         /* can't call flush scheduled work here because it can deadlock
1696          * if linkwatch_event tries to acquire the rtnl_lock which we are
1697          * holding */
1698         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1699                 msleep(1);
1700
1701         /* disable transmits in the hardware now that interrupts are off */
1702         for (i = 0; i < adapter->num_tx_queues; i++) {
1703                 j = adapter->tx_ring[i].reg_idx;
1704                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1705                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1706                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1707         }
1708
1709         netif_carrier_off(netdev);
1710
1711         if (!pci_channel_offline(adapter->pdev))
1712                 ixgbevf_reset(adapter);
1713
1714         ixgbevf_clean_all_tx_rings(adapter);
1715         ixgbevf_clean_all_rx_rings(adapter);
1716 }
1717
1718 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1719 {
1720         WARN_ON(in_interrupt());
1721
1722         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1723                 msleep(1);
1724
1725         ixgbevf_down(adapter);
1726         ixgbevf_up(adapter);
1727
1728         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1729 }
1730
1731 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1732 {
1733         struct ixgbe_hw *hw = &adapter->hw;
1734         struct net_device *netdev = adapter->netdev;
1735
1736         if (hw->mac.ops.reset_hw(hw)) {
1737                 hw_dbg(hw, "PF still resetting\n");
1738         } else {
1739                 hw->mac.ops.init_hw(hw);
1740                 ixgbevf_negotiate_api(adapter);
1741         }
1742
1743         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1744                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1745                        netdev->addr_len);
1746                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1747                        netdev->addr_len);
1748         }
1749 }
1750
1751 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1752                                         int vectors)
1753 {
1754         int err = 0;
1755         int vector_threshold;
1756
1757         /* We'll want at least 2 (vector_threshold):
1758          * 1) TxQ[0] + RxQ[0] handler
1759          * 2) Other (Link Status Change, etc.)
1760          */
1761         vector_threshold = MIN_MSIX_COUNT;
1762
1763         /* The more we get, the more we will assign to Tx/Rx Cleanup
1764          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1765          * Right now, we simply care about how many we'll get; we'll
1766          * set them up later while requesting irq's.
1767          */
1768         while (vectors >= vector_threshold) {
1769                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1770                                       vectors);
1771                 if (!err || err < 0) /* Success or a nasty failure. */
1772                         break;
1773                 else /* err == number of vectors we should try again with */
1774                         vectors = err;
1775         }
1776
1777         if (vectors < vector_threshold)
1778                 err = -ENOMEM;
1779
1780         if (err) {
1781                 dev_err(&adapter->pdev->dev,
1782                         "Unable to allocate MSI-X interrupts\n");
1783                 kfree(adapter->msix_entries);
1784                 adapter->msix_entries = NULL;
1785         } else {
1786                 /*
1787                  * Adjust for only the vectors we'll use, which is minimum
1788                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1789                  * vectors we were allocated.
1790                  */
1791                 adapter->num_msix_vectors = vectors;
1792         }
1793
1794         return err;
1795 }
1796
1797 /**
1798  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1799  * @adapter: board private structure to initialize
1800  *
1801  * This is the top level queue allocation routine.  The order here is very
1802  * important, starting with the "most" number of features turned on at once,
1803  * and ending with the smallest set of features.  This way large combinations
1804  * can be allocated if they're turned on, and smaller combinations are the
1805  * fallthrough conditions.
1806  *
1807  **/
1808 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1809 {
1810         /* Start with base case */
1811         adapter->num_rx_queues = 1;
1812         adapter->num_tx_queues = 1;
1813 }
1814
1815 /**
1816  * ixgbevf_alloc_queues - Allocate memory for all rings
1817  * @adapter: board private structure to initialize
1818  *
1819  * We allocate one ring per queue at run-time since we don't know the
1820  * number of queues at compile-time.  The polling_netdev array is
1821  * intended for Multiqueue, but should work fine with a single queue.
1822  **/
1823 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1824 {
1825         int i;
1826
1827         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1828                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1829         if (!adapter->tx_ring)
1830                 goto err_tx_ring_allocation;
1831
1832         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1833                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1834         if (!adapter->rx_ring)
1835                 goto err_rx_ring_allocation;
1836
1837         for (i = 0; i < adapter->num_tx_queues; i++) {
1838                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1839                 adapter->tx_ring[i].queue_index = i;
1840                 /* reg_idx may be remapped later by DCB config */
1841                 adapter->tx_ring[i].reg_idx = i;
1842                 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1843                 adapter->tx_ring[i].netdev = adapter->netdev;
1844         }
1845
1846         for (i = 0; i < adapter->num_rx_queues; i++) {
1847                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1848                 adapter->rx_ring[i].queue_index = i;
1849                 adapter->rx_ring[i].reg_idx = i;
1850                 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1851                 adapter->rx_ring[i].netdev = adapter->netdev;
1852         }
1853
1854         return 0;
1855
1856 err_rx_ring_allocation:
1857         kfree(adapter->tx_ring);
1858 err_tx_ring_allocation:
1859         return -ENOMEM;
1860 }
1861
1862 /**
1863  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1864  * @adapter: board private structure to initialize
1865  *
1866  * Attempt to configure the interrupts using the best available
1867  * capabilities of the hardware and the kernel.
1868  **/
1869 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1870 {
1871         struct net_device *netdev = adapter->netdev;
1872         int err = 0;
1873         int vector, v_budget;
1874
1875         /*
1876          * It's easy to be greedy for MSI-X vectors, but it really
1877          * doesn't do us much good if we have a lot more vectors
1878          * than CPU's.  So let's be conservative and only ask for
1879          * (roughly) the same number of vectors as there are CPU's.
1880          * The default is to use pairs of vectors.
1881          */
1882         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1883         v_budget = min_t(int, v_budget, num_online_cpus());
1884         v_budget += NON_Q_VECTORS;
1885
1886         /* A failure in MSI-X entry allocation isn't fatal, but it does
1887          * mean we disable MSI-X capabilities of the adapter. */
1888         adapter->msix_entries = kcalloc(v_budget,
1889                                         sizeof(struct msix_entry), GFP_KERNEL);
1890         if (!adapter->msix_entries) {
1891                 err = -ENOMEM;
1892                 goto out;
1893         }
1894
1895         for (vector = 0; vector < v_budget; vector++)
1896                 adapter->msix_entries[vector].entry = vector;
1897
1898         err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
1899         if (err)
1900                 goto out;
1901
1902         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
1903         if (err)
1904                 goto out;
1905
1906         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
1907
1908 out:
1909         return err;
1910 }
1911
1912 /**
1913  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
1914  * @adapter: board private structure to initialize
1915  *
1916  * We allocate one q_vector per queue interrupt.  If allocation fails we
1917  * return -ENOMEM.
1918  **/
1919 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
1920 {
1921         int q_idx, num_q_vectors;
1922         struct ixgbevf_q_vector *q_vector;
1923
1924         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1925
1926         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1927                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
1928                 if (!q_vector)
1929                         goto err_out;
1930                 q_vector->adapter = adapter;
1931                 q_vector->v_idx = q_idx;
1932                 netif_napi_add(adapter->netdev, &q_vector->napi,
1933                                ixgbevf_poll, 64);
1934                 adapter->q_vector[q_idx] = q_vector;
1935         }
1936
1937         return 0;
1938
1939 err_out:
1940         while (q_idx) {
1941                 q_idx--;
1942                 q_vector = adapter->q_vector[q_idx];
1943                 netif_napi_del(&q_vector->napi);
1944                 kfree(q_vector);
1945                 adapter->q_vector[q_idx] = NULL;
1946         }
1947         return -ENOMEM;
1948 }
1949
1950 /**
1951  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
1952  * @adapter: board private structure to initialize
1953  *
1954  * This function frees the memory allocated to the q_vectors.  In addition if
1955  * NAPI is enabled it will delete any references to the NAPI struct prior
1956  * to freeing the q_vector.
1957  **/
1958 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
1959 {
1960         int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1961
1962         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1963                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
1964
1965                 adapter->q_vector[q_idx] = NULL;
1966                 netif_napi_del(&q_vector->napi);
1967                 kfree(q_vector);
1968         }
1969 }
1970
1971 /**
1972  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
1973  * @adapter: board private structure
1974  *
1975  **/
1976 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
1977 {
1978         pci_disable_msix(adapter->pdev);
1979         kfree(adapter->msix_entries);
1980         adapter->msix_entries = NULL;
1981 }
1982
1983 /**
1984  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
1985  * @adapter: board private structure to initialize
1986  *
1987  **/
1988 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
1989 {
1990         int err;
1991
1992         /* Number of supported queues */
1993         ixgbevf_set_num_queues(adapter);
1994
1995         err = ixgbevf_set_interrupt_capability(adapter);
1996         if (err) {
1997                 hw_dbg(&adapter->hw,
1998                        "Unable to setup interrupt capabilities\n");
1999                 goto err_set_interrupt;
2000         }
2001
2002         err = ixgbevf_alloc_q_vectors(adapter);
2003         if (err) {
2004                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2005                        "vectors\n");
2006                 goto err_alloc_q_vectors;
2007         }
2008
2009         err = ixgbevf_alloc_queues(adapter);
2010         if (err) {
2011                 pr_err("Unable to allocate memory for queues\n");
2012                 goto err_alloc_queues;
2013         }
2014
2015         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2016                "Tx Queue count = %u\n",
2017                (adapter->num_rx_queues > 1) ? "Enabled" :
2018                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2019
2020         set_bit(__IXGBEVF_DOWN, &adapter->state);
2021
2022         return 0;
2023 err_alloc_queues:
2024         ixgbevf_free_q_vectors(adapter);
2025 err_alloc_q_vectors:
2026         ixgbevf_reset_interrupt_capability(adapter);
2027 err_set_interrupt:
2028         return err;
2029 }
2030
2031 /**
2032  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2033  * @adapter: board private structure to clear interrupt scheme on
2034  *
2035  * We go through and clear interrupt specific resources and reset the structure
2036  * to pre-load conditions
2037  **/
2038 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2039 {
2040         adapter->num_tx_queues = 0;
2041         adapter->num_rx_queues = 0;
2042
2043         ixgbevf_free_q_vectors(adapter);
2044         ixgbevf_reset_interrupt_capability(adapter);
2045 }
2046
2047 /**
2048  * ixgbevf_sw_init - Initialize general software structures
2049  * (struct ixgbevf_adapter)
2050  * @adapter: board private structure to initialize
2051  *
2052  * ixgbevf_sw_init initializes the Adapter private data structure.
2053  * Fields are initialized based on PCI device information and
2054  * OS network device settings (MTU size).
2055  **/
2056 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2057 {
2058         struct ixgbe_hw *hw = &adapter->hw;
2059         struct pci_dev *pdev = adapter->pdev;
2060         struct net_device *netdev = adapter->netdev;
2061         int err;
2062
2063         /* PCI config space info */
2064
2065         hw->vendor_id = pdev->vendor;
2066         hw->device_id = pdev->device;
2067         hw->revision_id = pdev->revision;
2068         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2069         hw->subsystem_device_id = pdev->subsystem_device;
2070
2071         hw->mbx.ops.init_params(hw);
2072
2073         /* assume legacy case in which PF would only give VF 2 queues */
2074         hw->mac.max_tx_queues = 2;
2075         hw->mac.max_rx_queues = 2;
2076
2077         /* lock to protect mailbox accesses */
2078         spin_lock_init(&adapter->mbx_lock);
2079
2080         err = hw->mac.ops.reset_hw(hw);
2081         if (err) {
2082                 dev_info(&pdev->dev,
2083                          "PF still in reset state.  Is the PF interface up?\n");
2084         } else {
2085                 err = hw->mac.ops.init_hw(hw);
2086                 if (err) {
2087                         pr_err("init_shared_code failed: %d\n", err);
2088                         goto out;
2089                 }
2090                 ixgbevf_negotiate_api(adapter);
2091                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2092                 if (err)
2093                         dev_info(&pdev->dev, "Error reading MAC address\n");
2094                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2095                         dev_info(&pdev->dev,
2096                                  "MAC address not assigned by administrator.\n");
2097                 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2098         }
2099
2100         if (!is_valid_ether_addr(netdev->dev_addr)) {
2101                 dev_info(&pdev->dev, "Assigning random MAC address\n");
2102                 eth_hw_addr_random(netdev);
2103                 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2104         }
2105
2106         /* Enable dynamic interrupt throttling rates */
2107         adapter->rx_itr_setting = 1;
2108         adapter->tx_itr_setting = 1;
2109
2110         /* set default ring sizes */
2111         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2112         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2113
2114         set_bit(__IXGBEVF_DOWN, &adapter->state);
2115         return 0;
2116
2117 out:
2118         return err;
2119 }
2120
2121 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
2122         {                                                       \
2123                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
2124                 if (current_counter < last_counter)             \
2125                         counter += 0x100000000LL;               \
2126                 last_counter = current_counter;                 \
2127                 counter &= 0xFFFFFFFF00000000LL;                \
2128                 counter |= current_counter;                     \
2129         }
2130
2131 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2132         {                                                                \
2133                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2134                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2135                 u64 current_counter = (current_counter_msb << 32) |      \
2136                         current_counter_lsb;                             \
2137                 if (current_counter < last_counter)                      \
2138                         counter += 0x1000000000LL;                       \
2139                 last_counter = current_counter;                          \
2140                 counter &= 0xFFFFFFF000000000LL;                         \
2141                 counter |= current_counter;                              \
2142         }
2143 /**
2144  * ixgbevf_update_stats - Update the board statistics counters.
2145  * @adapter: board private structure
2146  **/
2147 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2148 {
2149         struct ixgbe_hw *hw = &adapter->hw;
2150         int i;
2151
2152         if (!adapter->link_up)
2153                 return;
2154
2155         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2156                                 adapter->stats.vfgprc);
2157         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2158                                 adapter->stats.vfgptc);
2159         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2160                                 adapter->stats.last_vfgorc,
2161                                 adapter->stats.vfgorc);
2162         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2163                                 adapter->stats.last_vfgotc,
2164                                 adapter->stats.vfgotc);
2165         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2166                                 adapter->stats.vfmprc);
2167
2168         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
2169                 adapter->hw_csum_rx_error +=
2170                         adapter->rx_ring[i].hw_csum_rx_error;
2171                 adapter->hw_csum_rx_good +=
2172                         adapter->rx_ring[i].hw_csum_rx_good;
2173                 adapter->rx_ring[i].hw_csum_rx_error = 0;
2174                 adapter->rx_ring[i].hw_csum_rx_good = 0;
2175         }
2176 }
2177
2178 /**
2179  * ixgbevf_watchdog - Timer Call-back
2180  * @data: pointer to adapter cast into an unsigned long
2181  **/
2182 static void ixgbevf_watchdog(unsigned long data)
2183 {
2184         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2185         struct ixgbe_hw *hw = &adapter->hw;
2186         u32 eics = 0;
2187         int i;
2188
2189         /*
2190          * Do the watchdog outside of interrupt context due to the lovely
2191          * delays that some of the newer hardware requires
2192          */
2193
2194         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2195                 goto watchdog_short_circuit;
2196
2197         /* get one bit for every active tx/rx interrupt vector */
2198         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2199                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2200                 if (qv->rx.ring || qv->tx.ring)
2201                         eics |= 1 << i;
2202         }
2203
2204         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2205
2206 watchdog_short_circuit:
2207         schedule_work(&adapter->watchdog_task);
2208 }
2209
2210 /**
2211  * ixgbevf_tx_timeout - Respond to a Tx Hang
2212  * @netdev: network interface device structure
2213  **/
2214 static void ixgbevf_tx_timeout(struct net_device *netdev)
2215 {
2216         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2217
2218         /* Do the reset outside of interrupt context */
2219         schedule_work(&adapter->reset_task);
2220 }
2221
2222 static void ixgbevf_reset_task(struct work_struct *work)
2223 {
2224         struct ixgbevf_adapter *adapter;
2225         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2226
2227         /* If we're already down or resetting, just bail */
2228         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2229             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2230                 return;
2231
2232         adapter->tx_timeout_count++;
2233
2234         ixgbevf_reinit_locked(adapter);
2235 }
2236
2237 /**
2238  * ixgbevf_watchdog_task - worker thread to bring link up
2239  * @work: pointer to work_struct containing our data
2240  **/
2241 static void ixgbevf_watchdog_task(struct work_struct *work)
2242 {
2243         struct ixgbevf_adapter *adapter = container_of(work,
2244                                                        struct ixgbevf_adapter,
2245                                                        watchdog_task);
2246         struct net_device *netdev = adapter->netdev;
2247         struct ixgbe_hw *hw = &adapter->hw;
2248         u32 link_speed = adapter->link_speed;
2249         bool link_up = adapter->link_up;
2250         s32 need_reset;
2251
2252         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2253
2254         /*
2255          * Always check the link on the watchdog because we have
2256          * no LSC interrupt
2257          */
2258         spin_lock_bh(&adapter->mbx_lock);
2259
2260         need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2261
2262         spin_unlock_bh(&adapter->mbx_lock);
2263
2264         if (need_reset) {
2265                 adapter->link_up = link_up;
2266                 adapter->link_speed = link_speed;
2267                 netif_carrier_off(netdev);
2268                 netif_tx_stop_all_queues(netdev);
2269                 schedule_work(&adapter->reset_task);
2270                 goto pf_has_reset;
2271         }
2272         adapter->link_up = link_up;
2273         adapter->link_speed = link_speed;
2274
2275         if (link_up) {
2276                 if (!netif_carrier_ok(netdev)) {
2277                         char *link_speed_string;
2278                         switch (link_speed) {
2279                         case IXGBE_LINK_SPEED_10GB_FULL:
2280                                 link_speed_string = "10 Gbps";
2281                                 break;
2282                         case IXGBE_LINK_SPEED_1GB_FULL:
2283                                 link_speed_string = "1 Gbps";
2284                                 break;
2285                         case IXGBE_LINK_SPEED_100_FULL:
2286                                 link_speed_string = "100 Mbps";
2287                                 break;
2288                         default:
2289                                 link_speed_string = "unknown speed";
2290                                 break;
2291                         }
2292                         dev_info(&adapter->pdev->dev,
2293                                 "NIC Link is Up, %s\n", link_speed_string);
2294                         netif_carrier_on(netdev);
2295                         netif_tx_wake_all_queues(netdev);
2296                 }
2297         } else {
2298                 adapter->link_up = false;
2299                 adapter->link_speed = 0;
2300                 if (netif_carrier_ok(netdev)) {
2301                         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2302                         netif_carrier_off(netdev);
2303                         netif_tx_stop_all_queues(netdev);
2304                 }
2305         }
2306
2307         ixgbevf_update_stats(adapter);
2308
2309 pf_has_reset:
2310         /* Reset the timer */
2311         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2312                 mod_timer(&adapter->watchdog_timer,
2313                           round_jiffies(jiffies + (2 * HZ)));
2314
2315         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2316 }
2317
2318 /**
2319  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2320  * @adapter: board private structure
2321  * @tx_ring: Tx descriptor ring for a specific queue
2322  *
2323  * Free all transmit software resources
2324  **/
2325 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2326                                struct ixgbevf_ring *tx_ring)
2327 {
2328         struct pci_dev *pdev = adapter->pdev;
2329
2330         ixgbevf_clean_tx_ring(adapter, tx_ring);
2331
2332         vfree(tx_ring->tx_buffer_info);
2333         tx_ring->tx_buffer_info = NULL;
2334
2335         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2336                           tx_ring->dma);
2337
2338         tx_ring->desc = NULL;
2339 }
2340
2341 /**
2342  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2343  * @adapter: board private structure
2344  *
2345  * Free all transmit software resources
2346  **/
2347 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2348 {
2349         int i;
2350
2351         for (i = 0; i < adapter->num_tx_queues; i++)
2352                 if (adapter->tx_ring[i].desc)
2353                         ixgbevf_free_tx_resources(adapter,
2354                                                   &adapter->tx_ring[i]);
2355
2356 }
2357
2358 /**
2359  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2360  * @adapter: board private structure
2361  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2362  *
2363  * Return 0 on success, negative on failure
2364  **/
2365 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2366                                struct ixgbevf_ring *tx_ring)
2367 {
2368         struct pci_dev *pdev = adapter->pdev;
2369         int size;
2370
2371         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2372         tx_ring->tx_buffer_info = vzalloc(size);
2373         if (!tx_ring->tx_buffer_info)
2374                 goto err;
2375
2376         /* round up to nearest 4K */
2377         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2378         tx_ring->size = ALIGN(tx_ring->size, 4096);
2379
2380         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2381                                            &tx_ring->dma, GFP_KERNEL);
2382         if (!tx_ring->desc)
2383                 goto err;
2384
2385         tx_ring->next_to_use = 0;
2386         tx_ring->next_to_clean = 0;
2387         return 0;
2388
2389 err:
2390         vfree(tx_ring->tx_buffer_info);
2391         tx_ring->tx_buffer_info = NULL;
2392         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2393                "descriptor ring\n");
2394         return -ENOMEM;
2395 }
2396
2397 /**
2398  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2399  * @adapter: board private structure
2400  *
2401  * If this function returns with an error, then it's possible one or
2402  * more of the rings is populated (while the rest are not).  It is the
2403  * callers duty to clean those orphaned rings.
2404  *
2405  * Return 0 on success, negative on failure
2406  **/
2407 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2408 {
2409         int i, err = 0;
2410
2411         for (i = 0; i < adapter->num_tx_queues; i++) {
2412                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2413                 if (!err)
2414                         continue;
2415                 hw_dbg(&adapter->hw,
2416                        "Allocation for Tx Queue %u failed\n", i);
2417                 break;
2418         }
2419
2420         return err;
2421 }
2422
2423 /**
2424  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2425  * @adapter: board private structure
2426  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2427  *
2428  * Returns 0 on success, negative on failure
2429  **/
2430 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2431                                struct ixgbevf_ring *rx_ring)
2432 {
2433         struct pci_dev *pdev = adapter->pdev;
2434         int size;
2435
2436         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2437         rx_ring->rx_buffer_info = vzalloc(size);
2438         if (!rx_ring->rx_buffer_info)
2439                 goto alloc_failed;
2440
2441         /* Round up to nearest 4K */
2442         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2443         rx_ring->size = ALIGN(rx_ring->size, 4096);
2444
2445         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2446                                            &rx_ring->dma, GFP_KERNEL);
2447
2448         if (!rx_ring->desc) {
2449                 vfree(rx_ring->rx_buffer_info);
2450                 rx_ring->rx_buffer_info = NULL;
2451                 goto alloc_failed;
2452         }
2453
2454         rx_ring->next_to_clean = 0;
2455         rx_ring->next_to_use = 0;
2456
2457         return 0;
2458 alloc_failed:
2459         return -ENOMEM;
2460 }
2461
2462 /**
2463  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2464  * @adapter: board private structure
2465  *
2466  * If this function returns with an error, then it's possible one or
2467  * more of the rings is populated (while the rest are not).  It is the
2468  * callers duty to clean those orphaned rings.
2469  *
2470  * Return 0 on success, negative on failure
2471  **/
2472 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2473 {
2474         int i, err = 0;
2475
2476         for (i = 0; i < adapter->num_rx_queues; i++) {
2477                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2478                 if (!err)
2479                         continue;
2480                 hw_dbg(&adapter->hw,
2481                        "Allocation for Rx Queue %u failed\n", i);
2482                 break;
2483         }
2484         return err;
2485 }
2486
2487 /**
2488  * ixgbevf_free_rx_resources - Free Rx Resources
2489  * @adapter: board private structure
2490  * @rx_ring: ring to clean the resources from
2491  *
2492  * Free all receive software resources
2493  **/
2494 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2495                                struct ixgbevf_ring *rx_ring)
2496 {
2497         struct pci_dev *pdev = adapter->pdev;
2498
2499         ixgbevf_clean_rx_ring(adapter, rx_ring);
2500
2501         vfree(rx_ring->rx_buffer_info);
2502         rx_ring->rx_buffer_info = NULL;
2503
2504         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2505                           rx_ring->dma);
2506
2507         rx_ring->desc = NULL;
2508 }
2509
2510 /**
2511  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2512  * @adapter: board private structure
2513  *
2514  * Free all receive software resources
2515  **/
2516 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2517 {
2518         int i;
2519
2520         for (i = 0; i < adapter->num_rx_queues; i++)
2521                 if (adapter->rx_ring[i].desc)
2522                         ixgbevf_free_rx_resources(adapter,
2523                                                   &adapter->rx_ring[i]);
2524 }
2525
2526 static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter)
2527 {
2528         struct ixgbe_hw *hw = &adapter->hw;
2529         struct ixgbevf_ring *rx_ring;
2530         unsigned int def_q = 0;
2531         unsigned int num_tcs = 0;
2532         unsigned int num_rx_queues = 1;
2533         int err, i;
2534
2535         spin_lock_bh(&adapter->mbx_lock);
2536
2537         /* fetch queue configuration from the PF */
2538         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2539
2540         spin_unlock_bh(&adapter->mbx_lock);
2541
2542         if (err)
2543                 return err;
2544
2545         if (num_tcs > 1) {
2546                 /* update default Tx ring register index */
2547                 adapter->tx_ring[0].reg_idx = def_q;
2548
2549                 /* we need as many queues as traffic classes */
2550                 num_rx_queues = num_tcs;
2551         }
2552
2553         /* nothing to do if we have the correct number of queues */
2554         if (adapter->num_rx_queues == num_rx_queues)
2555                 return 0;
2556
2557         /* allocate new rings */
2558         rx_ring = kcalloc(num_rx_queues,
2559                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
2560         if (!rx_ring)
2561                 return -ENOMEM;
2562
2563         /* setup ring fields */
2564         for (i = 0; i < num_rx_queues; i++) {
2565                 rx_ring[i].count = adapter->rx_ring_count;
2566                 rx_ring[i].queue_index = i;
2567                 rx_ring[i].reg_idx = i;
2568                 rx_ring[i].dev = &adapter->pdev->dev;
2569                 rx_ring[i].netdev = adapter->netdev;
2570         }
2571
2572         /* free the existing ring and queues */
2573         adapter->num_rx_queues = 0;
2574         kfree(adapter->rx_ring);
2575
2576         /* move new rings into position on the adapter struct */
2577         adapter->rx_ring = rx_ring;
2578         adapter->num_rx_queues = num_rx_queues;
2579
2580         return 0;
2581 }
2582
2583 /**
2584  * ixgbevf_open - Called when a network interface is made active
2585  * @netdev: network interface device structure
2586  *
2587  * Returns 0 on success, negative value on failure
2588  *
2589  * The open entry point is called when a network interface is made
2590  * active by the system (IFF_UP).  At this point all resources needed
2591  * for transmit and receive operations are allocated, the interrupt
2592  * handler is registered with the OS, the watchdog timer is started,
2593  * and the stack is notified that the interface is ready.
2594  **/
2595 static int ixgbevf_open(struct net_device *netdev)
2596 {
2597         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2598         struct ixgbe_hw *hw = &adapter->hw;
2599         int err;
2600
2601         /* A previous failure to open the device because of a lack of
2602          * available MSIX vector resources may have reset the number
2603          * of msix vectors variable to zero.  The only way to recover
2604          * is to unload/reload the driver and hope that the system has
2605          * been able to recover some MSIX vector resources.
2606          */
2607         if (!adapter->num_msix_vectors)
2608                 return -ENOMEM;
2609
2610         /* disallow open during test */
2611         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2612                 return -EBUSY;
2613
2614         if (hw->adapter_stopped) {
2615                 ixgbevf_reset(adapter);
2616                 /* if adapter is still stopped then PF isn't up and
2617                  * the vf can't start. */
2618                 if (hw->adapter_stopped) {
2619                         err = IXGBE_ERR_MBX;
2620                         pr_err("Unable to start - perhaps the PF Driver isn't "
2621                                "up yet\n");
2622                         goto err_setup_reset;
2623                 }
2624         }
2625
2626         /* setup queue reg_idx and Rx queue count */
2627         err = ixgbevf_setup_queues(adapter);
2628         if (err)
2629                 goto err_setup_queues;
2630
2631         /* allocate transmit descriptors */
2632         err = ixgbevf_setup_all_tx_resources(adapter);
2633         if (err)
2634                 goto err_setup_tx;
2635
2636         /* allocate receive descriptors */
2637         err = ixgbevf_setup_all_rx_resources(adapter);
2638         if (err)
2639                 goto err_setup_rx;
2640
2641         ixgbevf_configure(adapter);
2642
2643         /*
2644          * Map the Tx/Rx rings to the vectors we were allotted.
2645          * if request_irq will be called in this function map_rings
2646          * must be called *before* up_complete
2647          */
2648         ixgbevf_map_rings_to_vectors(adapter);
2649
2650         ixgbevf_up_complete(adapter);
2651
2652         /* clear any pending interrupts, may auto mask */
2653         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2654         err = ixgbevf_request_irq(adapter);
2655         if (err)
2656                 goto err_req_irq;
2657
2658         ixgbevf_irq_enable(adapter);
2659
2660         return 0;
2661
2662 err_req_irq:
2663         ixgbevf_down(adapter);
2664 err_setup_rx:
2665         ixgbevf_free_all_rx_resources(adapter);
2666 err_setup_tx:
2667         ixgbevf_free_all_tx_resources(adapter);
2668 err_setup_queues:
2669         ixgbevf_reset(adapter);
2670
2671 err_setup_reset:
2672
2673         return err;
2674 }
2675
2676 /**
2677  * ixgbevf_close - Disables a network interface
2678  * @netdev: network interface device structure
2679  *
2680  * Returns 0, this is not allowed to fail
2681  *
2682  * The close entry point is called when an interface is de-activated
2683  * by the OS.  The hardware is still under the drivers control, but
2684  * needs to be disabled.  A global MAC reset is issued to stop the
2685  * hardware, and all transmit and receive resources are freed.
2686  **/
2687 static int ixgbevf_close(struct net_device *netdev)
2688 {
2689         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2690
2691         ixgbevf_down(adapter);
2692         ixgbevf_free_irq(adapter);
2693
2694         ixgbevf_free_all_tx_resources(adapter);
2695         ixgbevf_free_all_rx_resources(adapter);
2696
2697         return 0;
2698 }
2699
2700 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2701                                 u32 vlan_macip_lens, u32 type_tucmd,
2702                                 u32 mss_l4len_idx)
2703 {
2704         struct ixgbe_adv_tx_context_desc *context_desc;
2705         u16 i = tx_ring->next_to_use;
2706
2707         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2708
2709         i++;
2710         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2711
2712         /* set bits to identify this as an advanced context descriptor */
2713         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2714
2715         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
2716         context_desc->seqnum_seed       = 0;
2717         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
2718         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2719 }
2720
2721 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2722                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2723 {
2724         u32 vlan_macip_lens, type_tucmd;
2725         u32 mss_l4len_idx, l4len;
2726
2727         if (!skb_is_gso(skb))
2728                 return 0;
2729
2730         if (skb_header_cloned(skb)) {
2731                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2732                 if (err)
2733                         return err;
2734         }
2735
2736         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2737         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2738
2739         if (skb->protocol == htons(ETH_P_IP)) {
2740                 struct iphdr *iph = ip_hdr(skb);
2741                 iph->tot_len = 0;
2742                 iph->check = 0;
2743                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2744                                                          iph->daddr, 0,
2745                                                          IPPROTO_TCP,
2746                                                          0);
2747                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2748         } else if (skb_is_gso_v6(skb)) {
2749                 ipv6_hdr(skb)->payload_len = 0;
2750                 tcp_hdr(skb)->check =
2751                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2752                                      &ipv6_hdr(skb)->daddr,
2753                                      0, IPPROTO_TCP, 0);
2754         }
2755
2756         /* compute header lengths */
2757         l4len = tcp_hdrlen(skb);
2758         *hdr_len += l4len;
2759         *hdr_len = skb_transport_offset(skb) + l4len;
2760
2761         /* mss_l4len_id: use 1 as index for TSO */
2762         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2763         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2764         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2765
2766         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2767         vlan_macip_lens = skb_network_header_len(skb);
2768         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2769         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2770
2771         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2772                             type_tucmd, mss_l4len_idx);
2773
2774         return 1;
2775 }
2776
2777 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2778                             struct sk_buff *skb, u32 tx_flags)
2779 {
2780         u32 vlan_macip_lens = 0;
2781         u32 mss_l4len_idx = 0;
2782         u32 type_tucmd = 0;
2783
2784         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2785                 u8 l4_hdr = 0;
2786                 switch (skb->protocol) {
2787                 case __constant_htons(ETH_P_IP):
2788                         vlan_macip_lens |= skb_network_header_len(skb);
2789                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2790                         l4_hdr = ip_hdr(skb)->protocol;
2791                         break;
2792                 case __constant_htons(ETH_P_IPV6):
2793                         vlan_macip_lens |= skb_network_header_len(skb);
2794                         l4_hdr = ipv6_hdr(skb)->nexthdr;
2795                         break;
2796                 default:
2797                         if (unlikely(net_ratelimit())) {
2798                                 dev_warn(tx_ring->dev,
2799                                  "partial checksum but proto=%x!\n",
2800                                  skb->protocol);
2801                         }
2802                         break;
2803                 }
2804
2805                 switch (l4_hdr) {
2806                 case IPPROTO_TCP:
2807                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2808                         mss_l4len_idx = tcp_hdrlen(skb) <<
2809                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2810                         break;
2811                 case IPPROTO_SCTP:
2812                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2813                         mss_l4len_idx = sizeof(struct sctphdr) <<
2814                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2815                         break;
2816                 case IPPROTO_UDP:
2817                         mss_l4len_idx = sizeof(struct udphdr) <<
2818                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2819                         break;
2820                 default:
2821                         if (unlikely(net_ratelimit())) {
2822                                 dev_warn(tx_ring->dev,
2823                                  "partial checksum but l4 proto=%x!\n",
2824                                  l4_hdr);
2825                         }
2826                         break;
2827                 }
2828         }
2829
2830         /* vlan_macip_lens: MACLEN, VLAN tag */
2831         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2832         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2833
2834         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2835                             type_tucmd, mss_l4len_idx);
2836
2837         return (skb->ip_summed == CHECKSUM_PARTIAL);
2838 }
2839
2840 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2841                           struct sk_buff *skb, u32 tx_flags)
2842 {
2843         struct ixgbevf_tx_buffer *tx_buffer_info;
2844         unsigned int len;
2845         unsigned int total = skb->len;
2846         unsigned int offset = 0, size;
2847         int count = 0;
2848         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2849         unsigned int f;
2850         int i;
2851
2852         i = tx_ring->next_to_use;
2853
2854         len = min(skb_headlen(skb), total);
2855         while (len) {
2856                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2857                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2858
2859                 tx_buffer_info->length = size;
2860                 tx_buffer_info->mapped_as_page = false;
2861                 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2862                                                      skb->data + offset,
2863                                                      size, DMA_TO_DEVICE);
2864                 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2865                         goto dma_error;
2866
2867                 len -= size;
2868                 total -= size;
2869                 offset += size;
2870                 count++;
2871                 i++;
2872                 if (i == tx_ring->count)
2873                         i = 0;
2874         }
2875
2876         for (f = 0; f < nr_frags; f++) {
2877                 const struct skb_frag_struct *frag;
2878
2879                 frag = &skb_shinfo(skb)->frags[f];
2880                 len = min((unsigned int)skb_frag_size(frag), total);
2881                 offset = 0;
2882
2883                 while (len) {
2884                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2885                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2886
2887                         tx_buffer_info->length = size;
2888                         tx_buffer_info->dma =
2889                                 skb_frag_dma_map(tx_ring->dev, frag,
2890                                                  offset, size, DMA_TO_DEVICE);
2891                         if (dma_mapping_error(tx_ring->dev,
2892                                               tx_buffer_info->dma))
2893                                 goto dma_error;
2894                         tx_buffer_info->mapped_as_page = true;
2895
2896                         len -= size;
2897                         total -= size;
2898                         offset += size;
2899                         count++;
2900                         i++;
2901                         if (i == tx_ring->count)
2902                                 i = 0;
2903                 }
2904                 if (total == 0)
2905                         break;
2906         }
2907
2908         if (i == 0)
2909                 i = tx_ring->count - 1;
2910         else
2911                 i = i - 1;
2912         tx_ring->tx_buffer_info[i].skb = skb;
2913
2914         return count;
2915
2916 dma_error:
2917         dev_err(tx_ring->dev, "TX DMA map failed\n");
2918
2919         /* clear timestamp and dma mappings for failed tx_buffer_info map */
2920         tx_buffer_info->dma = 0;
2921         count--;
2922
2923         /* clear timestamp and dma mappings for remaining portion of packet */
2924         while (count >= 0) {
2925                 count--;
2926                 i--;
2927                 if (i < 0)
2928                         i += tx_ring->count;
2929                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2930                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2931         }
2932
2933         return count;
2934 }
2935
2936 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
2937                              int count, unsigned int first, u32 paylen,
2938                              u8 hdr_len)
2939 {
2940         union ixgbe_adv_tx_desc *tx_desc = NULL;
2941         struct ixgbevf_tx_buffer *tx_buffer_info;
2942         u32 olinfo_status = 0, cmd_type_len = 0;
2943         unsigned int i;
2944
2945         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2946
2947         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2948
2949         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2950
2951         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2952                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2953
2954         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2955                 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
2956
2957         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2958                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2959
2960                 /* use index 1 context for tso */
2961                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2962                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2963                         olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
2964         }
2965
2966         /*
2967          * Check Context must be set if Tx switch is enabled, which it
2968          * always is for case where virtual functions are running
2969          */
2970         olinfo_status |= IXGBE_ADVTXD_CC;
2971
2972         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2973
2974         i = tx_ring->next_to_use;
2975         while (count--) {
2976                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2977                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2978                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2979                 tx_desc->read.cmd_type_len =
2980                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2981                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2982                 i++;
2983                 if (i == tx_ring->count)
2984                         i = 0;
2985         }
2986
2987         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2988
2989         tx_ring->tx_buffer_info[first].time_stamp = jiffies;
2990
2991         /* Force memory writes to complete before letting h/w
2992          * know there are new descriptors to fetch.  (Only
2993          * applicable for weak-ordered memory model archs,
2994          * such as IA-64).
2995          */
2996         wmb();
2997
2998         tx_ring->tx_buffer_info[first].next_to_watch = tx_desc;
2999         tx_ring->next_to_use = i;
3000 }
3001
3002 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3003 {
3004         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3005
3006         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3007         /* Herbert's original patch had:
3008          *  smp_mb__after_netif_stop_queue();
3009          * but since that doesn't exist yet, just open code it. */
3010         smp_mb();
3011
3012         /* We need to check again in a case another CPU has just
3013          * made room available. */
3014         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3015                 return -EBUSY;
3016
3017         /* A reprieve! - use start_queue because it doesn't call schedule */
3018         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3019         ++adapter->restart_queue;
3020         return 0;
3021 }
3022
3023 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3024 {
3025         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3026                 return 0;
3027         return __ixgbevf_maybe_stop_tx(tx_ring, size);
3028 }
3029
3030 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3031 {
3032         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3033         struct ixgbevf_ring *tx_ring;
3034         unsigned int first;
3035         unsigned int tx_flags = 0;
3036         u8 hdr_len = 0;
3037         int r_idx = 0, tso;
3038         u16 count = TXD_USE_COUNT(skb_headlen(skb));
3039 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3040         unsigned short f;
3041 #endif
3042         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3043         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3044                 dev_kfree_skb(skb);
3045                 return NETDEV_TX_OK;
3046         }
3047
3048         tx_ring = &adapter->tx_ring[r_idx];
3049
3050         /*
3051          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3052          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3053          *       + 2 desc gap to keep tail from touching head,
3054          *       + 1 desc for context descriptor,
3055          * otherwise try next time
3056          */
3057 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3058         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3059                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3060 #else
3061         count += skb_shinfo(skb)->nr_frags;
3062 #endif
3063         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3064                 adapter->tx_busy++;
3065                 return NETDEV_TX_BUSY;
3066         }
3067
3068         if (vlan_tx_tag_present(skb)) {
3069                 tx_flags |= vlan_tx_tag_get(skb);
3070                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3071                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3072         }
3073
3074         first = tx_ring->next_to_use;
3075
3076         if (skb->protocol == htons(ETH_P_IP))
3077                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3078         tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
3079         if (tso < 0) {
3080                 dev_kfree_skb_any(skb);
3081                 return NETDEV_TX_OK;
3082         }
3083
3084         if (tso)
3085                 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
3086         else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
3087                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3088
3089         ixgbevf_tx_queue(tx_ring, tx_flags,
3090                          ixgbevf_tx_map(tx_ring, skb, tx_flags),
3091                          first, skb->len, hdr_len);
3092
3093         writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
3094
3095         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3096
3097         return NETDEV_TX_OK;
3098 }
3099
3100 /**
3101  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3102  * @netdev: network interface device structure
3103  * @p: pointer to an address structure
3104  *
3105  * Returns 0 on success, negative on failure
3106  **/
3107 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3108 {
3109         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3110         struct ixgbe_hw *hw = &adapter->hw;
3111         struct sockaddr *addr = p;
3112
3113         if (!is_valid_ether_addr(addr->sa_data))
3114                 return -EADDRNOTAVAIL;
3115
3116         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3117         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3118
3119         spin_lock_bh(&adapter->mbx_lock);
3120
3121         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3122
3123         spin_unlock_bh(&adapter->mbx_lock);
3124
3125         return 0;
3126 }
3127
3128 /**
3129  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3130  * @netdev: network interface device structure
3131  * @new_mtu: new value for maximum frame size
3132  *
3133  * Returns 0 on success, negative on failure
3134  **/
3135 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3136 {
3137         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3138         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3139         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3140
3141         switch (adapter->hw.api_version) {
3142         case ixgbe_mbox_api_11:
3143                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3144                 break;
3145         default:
3146                 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3147                         max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3148                 break;
3149         }
3150
3151         /* MTU < 68 is an error and causes problems on some kernels */
3152         if ((new_mtu < 68) || (max_frame > max_possible_frame))
3153                 return -EINVAL;
3154
3155         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3156                netdev->mtu, new_mtu);
3157         /* must set new MTU before calling down or up */
3158         netdev->mtu = new_mtu;
3159
3160         if (netif_running(netdev))
3161                 ixgbevf_reinit_locked(adapter);
3162
3163         return 0;
3164 }
3165
3166 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3167 {
3168         struct net_device *netdev = pci_get_drvdata(pdev);
3169         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3170 #ifdef CONFIG_PM
3171         int retval = 0;
3172 #endif
3173
3174         netif_device_detach(netdev);
3175
3176         if (netif_running(netdev)) {
3177                 rtnl_lock();
3178                 ixgbevf_down(adapter);
3179                 ixgbevf_free_irq(adapter);
3180                 ixgbevf_free_all_tx_resources(adapter);
3181                 ixgbevf_free_all_rx_resources(adapter);
3182                 rtnl_unlock();
3183         }
3184
3185         ixgbevf_clear_interrupt_scheme(adapter);
3186
3187 #ifdef CONFIG_PM
3188         retval = pci_save_state(pdev);
3189         if (retval)
3190                 return retval;
3191
3192 #endif
3193         pci_disable_device(pdev);
3194
3195         return 0;
3196 }
3197
3198 #ifdef CONFIG_PM
3199 static int ixgbevf_resume(struct pci_dev *pdev)
3200 {
3201         struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
3202         struct net_device *netdev = adapter->netdev;
3203         u32 err;
3204
3205         pci_set_power_state(pdev, PCI_D0);
3206         pci_restore_state(pdev);
3207         /*
3208          * pci_restore_state clears dev->state_saved so call
3209          * pci_save_state to restore it.
3210          */
3211         pci_save_state(pdev);
3212
3213         err = pci_enable_device_mem(pdev);
3214         if (err) {
3215                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3216                 return err;
3217         }
3218         pci_set_master(pdev);
3219
3220         ixgbevf_reset(adapter);
3221
3222         rtnl_lock();
3223         err = ixgbevf_init_interrupt_scheme(adapter);
3224         rtnl_unlock();
3225         if (err) {
3226                 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3227                 return err;
3228         }
3229
3230         if (netif_running(netdev)) {
3231                 err = ixgbevf_open(netdev);
3232                 if (err)
3233                         return err;
3234         }
3235
3236         netif_device_attach(netdev);
3237
3238         return err;
3239 }
3240
3241 #endif /* CONFIG_PM */
3242 static void ixgbevf_shutdown(struct pci_dev *pdev)
3243 {
3244         ixgbevf_suspend(pdev, PMSG_SUSPEND);
3245 }
3246
3247 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3248                                                 struct rtnl_link_stats64 *stats)
3249 {
3250         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3251         unsigned int start;
3252         u64 bytes, packets;
3253         const struct ixgbevf_ring *ring;
3254         int i;
3255
3256         ixgbevf_update_stats(adapter);
3257
3258         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3259
3260         for (i = 0; i < adapter->num_rx_queues; i++) {
3261                 ring = &adapter->rx_ring[i];
3262                 do {
3263                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3264                         bytes = ring->total_bytes;
3265                         packets = ring->total_packets;
3266                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3267                 stats->rx_bytes += bytes;
3268                 stats->rx_packets += packets;
3269         }
3270
3271         for (i = 0; i < adapter->num_tx_queues; i++) {
3272                 ring = &adapter->tx_ring[i];
3273                 do {
3274                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3275                         bytes = ring->total_bytes;
3276                         packets = ring->total_packets;
3277                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3278                 stats->tx_bytes += bytes;
3279                 stats->tx_packets += packets;
3280         }
3281
3282         return stats;
3283 }
3284
3285 static const struct net_device_ops ixgbevf_netdev_ops = {
3286         .ndo_open               = ixgbevf_open,
3287         .ndo_stop               = ixgbevf_close,
3288         .ndo_start_xmit         = ixgbevf_xmit_frame,
3289         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3290         .ndo_get_stats64        = ixgbevf_get_stats,
3291         .ndo_validate_addr      = eth_validate_addr,
3292         .ndo_set_mac_address    = ixgbevf_set_mac,
3293         .ndo_change_mtu         = ixgbevf_change_mtu,
3294         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3295         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3296         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3297 };
3298
3299 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3300 {
3301         dev->netdev_ops = &ixgbevf_netdev_ops;
3302         ixgbevf_set_ethtool_ops(dev);
3303         dev->watchdog_timeo = 5 * HZ;
3304 }
3305
3306 /**
3307  * ixgbevf_probe - Device Initialization Routine
3308  * @pdev: PCI device information struct
3309  * @ent: entry in ixgbevf_pci_tbl
3310  *
3311  * Returns 0 on success, negative on failure
3312  *
3313  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3314  * The OS initialization, configuring of the adapter private structure,
3315  * and a hardware reset occur.
3316  **/
3317 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3318 {
3319         struct net_device *netdev;
3320         struct ixgbevf_adapter *adapter = NULL;
3321         struct ixgbe_hw *hw = NULL;
3322         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3323         static int cards_found;
3324         int err, pci_using_dac;
3325
3326         err = pci_enable_device(pdev);
3327         if (err)
3328                 return err;
3329
3330         if (!dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64))) {
3331                 pci_using_dac = 1;
3332         } else {
3333                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3334                 if (err) {
3335                         dev_err(&pdev->dev, "No usable DMA "
3336                                 "configuration, aborting\n");
3337                         goto err_dma;
3338                 }
3339                 pci_using_dac = 0;
3340         }
3341
3342         err = pci_request_regions(pdev, ixgbevf_driver_name);
3343         if (err) {
3344                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3345                 goto err_pci_reg;
3346         }
3347
3348         pci_set_master(pdev);
3349
3350         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3351                                    MAX_TX_QUEUES);
3352         if (!netdev) {
3353                 err = -ENOMEM;
3354                 goto err_alloc_etherdev;
3355         }
3356
3357         SET_NETDEV_DEV(netdev, &pdev->dev);
3358
3359         pci_set_drvdata(pdev, netdev);
3360         adapter = netdev_priv(netdev);
3361
3362         adapter->netdev = netdev;
3363         adapter->pdev = pdev;
3364         hw = &adapter->hw;
3365         hw->back = adapter;
3366         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3367
3368         /*
3369          * call save state here in standalone driver because it relies on
3370          * adapter struct to exist, and needs to call netdev_priv
3371          */
3372         pci_save_state(pdev);
3373
3374         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3375                               pci_resource_len(pdev, 0));
3376         if (!hw->hw_addr) {
3377                 err = -EIO;
3378                 goto err_ioremap;
3379         }
3380
3381         ixgbevf_assign_netdev_ops(netdev);
3382
3383         adapter->bd_number = cards_found;
3384
3385         /* Setup hw api */
3386         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3387         hw->mac.type  = ii->mac;
3388
3389         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3390                sizeof(struct ixgbe_mbx_operations));
3391
3392         /* setup the private structure */
3393         err = ixgbevf_sw_init(adapter);
3394         if (err)
3395                 goto err_sw_init;
3396
3397         /* The HW MAC address was set and/or determined in sw_init */
3398         if (!is_valid_ether_addr(netdev->dev_addr)) {
3399                 pr_err("invalid MAC address\n");
3400                 err = -EIO;
3401                 goto err_sw_init;
3402         }
3403
3404         netdev->hw_features = NETIF_F_SG |
3405                            NETIF_F_IP_CSUM |
3406                            NETIF_F_IPV6_CSUM |
3407                            NETIF_F_TSO |
3408                            NETIF_F_TSO6 |
3409                            NETIF_F_RXCSUM;
3410
3411         netdev->features = netdev->hw_features |
3412                            NETIF_F_HW_VLAN_CTAG_TX |
3413                            NETIF_F_HW_VLAN_CTAG_RX |
3414                            NETIF_F_HW_VLAN_CTAG_FILTER;
3415
3416         netdev->vlan_features |= NETIF_F_TSO;
3417         netdev->vlan_features |= NETIF_F_TSO6;
3418         netdev->vlan_features |= NETIF_F_IP_CSUM;
3419         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3420         netdev->vlan_features |= NETIF_F_SG;
3421
3422         if (pci_using_dac)
3423                 netdev->features |= NETIF_F_HIGHDMA;
3424
3425         netdev->priv_flags |= IFF_UNICAST_FLT;
3426
3427         init_timer(&adapter->watchdog_timer);
3428         adapter->watchdog_timer.function = ixgbevf_watchdog;
3429         adapter->watchdog_timer.data = (unsigned long)adapter;
3430
3431         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3432         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3433
3434         err = ixgbevf_init_interrupt_scheme(adapter);
3435         if (err)
3436                 goto err_sw_init;
3437
3438         strcpy(netdev->name, "eth%d");
3439
3440         err = register_netdev(netdev);
3441         if (err)
3442                 goto err_register;
3443
3444         netif_carrier_off(netdev);
3445
3446         ixgbevf_init_last_counter_stats(adapter);
3447
3448         /* print the MAC address */
3449         hw_dbg(hw, "%pM\n", netdev->dev_addr);
3450
3451         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3452
3453         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3454         cards_found++;
3455         return 0;
3456
3457 err_register:
3458         ixgbevf_clear_interrupt_scheme(adapter);
3459 err_sw_init:
3460         ixgbevf_reset_interrupt_capability(adapter);
3461         iounmap(hw->hw_addr);
3462 err_ioremap:
3463         free_netdev(netdev);
3464 err_alloc_etherdev:
3465         pci_release_regions(pdev);
3466 err_pci_reg:
3467 err_dma:
3468         pci_disable_device(pdev);
3469         return err;
3470 }
3471
3472 /**
3473  * ixgbevf_remove - Device Removal Routine
3474  * @pdev: PCI device information struct
3475  *
3476  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3477  * that it should release a PCI device.  The could be caused by a
3478  * Hot-Plug event, or because the driver is going to be removed from
3479  * memory.
3480  **/
3481 static void ixgbevf_remove(struct pci_dev *pdev)
3482 {
3483         struct net_device *netdev = pci_get_drvdata(pdev);
3484         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3485
3486         set_bit(__IXGBEVF_DOWN, &adapter->state);
3487
3488         del_timer_sync(&adapter->watchdog_timer);
3489
3490         cancel_work_sync(&adapter->reset_task);
3491         cancel_work_sync(&adapter->watchdog_task);
3492
3493         if (netdev->reg_state == NETREG_REGISTERED)
3494                 unregister_netdev(netdev);
3495
3496         ixgbevf_clear_interrupt_scheme(adapter);
3497         ixgbevf_reset_interrupt_capability(adapter);
3498
3499         iounmap(adapter->hw.hw_addr);
3500         pci_release_regions(pdev);
3501
3502         hw_dbg(&adapter->hw, "Remove complete\n");
3503
3504         kfree(adapter->tx_ring);
3505         kfree(adapter->rx_ring);
3506
3507         free_netdev(netdev);
3508
3509         pci_disable_device(pdev);
3510 }
3511
3512 /**
3513  * ixgbevf_io_error_detected - called when PCI error is detected
3514  * @pdev: Pointer to PCI device
3515  * @state: The current pci connection state
3516  *
3517  * This function is called after a PCI bus error affecting
3518  * this device has been detected.
3519  */
3520 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3521                                                   pci_channel_state_t state)
3522 {
3523         struct net_device *netdev = pci_get_drvdata(pdev);
3524         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3525
3526         netif_device_detach(netdev);
3527
3528         if (state == pci_channel_io_perm_failure)
3529                 return PCI_ERS_RESULT_DISCONNECT;
3530
3531         if (netif_running(netdev))
3532                 ixgbevf_down(adapter);
3533
3534         pci_disable_device(pdev);
3535
3536         /* Request a slot slot reset. */
3537         return PCI_ERS_RESULT_NEED_RESET;
3538 }
3539
3540 /**
3541  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3542  * @pdev: Pointer to PCI device
3543  *
3544  * Restart the card from scratch, as if from a cold-boot. Implementation
3545  * resembles the first-half of the ixgbevf_resume routine.
3546  */
3547 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3548 {
3549         struct net_device *netdev = pci_get_drvdata(pdev);
3550         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3551
3552         if (pci_enable_device_mem(pdev)) {
3553                 dev_err(&pdev->dev,
3554                         "Cannot re-enable PCI device after reset.\n");
3555                 return PCI_ERS_RESULT_DISCONNECT;
3556         }
3557
3558         pci_set_master(pdev);
3559
3560         ixgbevf_reset(adapter);
3561
3562         return PCI_ERS_RESULT_RECOVERED;
3563 }
3564
3565 /**
3566  * ixgbevf_io_resume - called when traffic can start flowing again.
3567  * @pdev: Pointer to PCI device
3568  *
3569  * This callback is called when the error recovery driver tells us that
3570  * its OK to resume normal operation. Implementation resembles the
3571  * second-half of the ixgbevf_resume routine.
3572  */
3573 static void ixgbevf_io_resume(struct pci_dev *pdev)
3574 {
3575         struct net_device *netdev = pci_get_drvdata(pdev);
3576         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3577
3578         if (netif_running(netdev))
3579                 ixgbevf_up(adapter);
3580
3581         netif_device_attach(netdev);
3582 }
3583
3584 /* PCI Error Recovery (ERS) */
3585 static const struct pci_error_handlers ixgbevf_err_handler = {
3586         .error_detected = ixgbevf_io_error_detected,
3587         .slot_reset = ixgbevf_io_slot_reset,
3588         .resume = ixgbevf_io_resume,
3589 };
3590
3591 static struct pci_driver ixgbevf_driver = {
3592         .name     = ixgbevf_driver_name,
3593         .id_table = ixgbevf_pci_tbl,
3594         .probe    = ixgbevf_probe,
3595         .remove   = ixgbevf_remove,
3596 #ifdef CONFIG_PM
3597         /* Power Management Hooks */
3598         .suspend  = ixgbevf_suspend,
3599         .resume   = ixgbevf_resume,
3600 #endif
3601         .shutdown = ixgbevf_shutdown,
3602         .err_handler = &ixgbevf_err_handler
3603 };
3604
3605 /**
3606  * ixgbevf_init_module - Driver Registration Routine
3607  *
3608  * ixgbevf_init_module is the first routine called when the driver is
3609  * loaded. All it does is register with the PCI subsystem.
3610  **/
3611 static int __init ixgbevf_init_module(void)
3612 {
3613         int ret;
3614         pr_info("%s - version %s\n", ixgbevf_driver_string,
3615                 ixgbevf_driver_version);
3616
3617         pr_info("%s\n", ixgbevf_copyright);
3618
3619         ret = pci_register_driver(&ixgbevf_driver);
3620         return ret;
3621 }
3622
3623 module_init(ixgbevf_init_module);
3624
3625 /**
3626  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3627  *
3628  * ixgbevf_exit_module is called just before the driver is removed
3629  * from memory.
3630  **/
3631 static void __exit ixgbevf_exit_module(void)
3632 {
3633         pci_unregister_driver(&ixgbevf_driver);
3634 }
3635
3636 #ifdef DEBUG
3637 /**
3638  * ixgbevf_get_hw_dev_name - return device name string
3639  * used by hardware layer to print debugging information
3640  **/
3641 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3642 {
3643         struct ixgbevf_adapter *adapter = hw->back;
3644         return adapter->netdev->name;
3645 }
3646
3647 #endif
3648 module_exit(ixgbevf_exit_module);
3649
3650 /* ixgbevf_main.c */