drivers/net/ixgbevf/ixgbevf_main.c

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2010 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 #include <linux/types.h>
  33 #include <linux/bitops.h>
  34 #include <linux/module.h>
  35 #include <linux/pci.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/vmalloc.h>
  38 #include <linux/string.h>
  39 #include <linux/in.h>
  40 #include <linux/ip.h>
  41 #include <linux/tcp.h>
  42 #include <linux/ipv6.h>
  43 #include <linux/slab.h>
  44 #include <net/checksum.h>
  45 #include <net/ip6_checksum.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/if_vlan.h>
  48 #include <linux/prefetch.h>
  49
  50 #include "ixgbevf.h"
  51
  52 char ixgbevf_driver_name[] = "ixgbevf";
  53 static const char ixgbevf_driver_string[] =
  54         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  55
  56 #define DRV_VERSION "2.1.0-k"
  57 const char ixgbevf_driver_version[] = DRV_VERSION;
  58 static char ixgbevf_copyright[] =
  59         "Copyright (c) 2009 - 2010 Intel Corporation.";
  60
  61 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  62         [board_82599_vf] = &ixgbevf_82599_vf_info,
  63         [board_X540_vf]  = &ixgbevf_X540_vf_info,
  64 };
  65
  66 /* ixgbevf_pci_tbl - PCI Device ID Table
  67  *
  68  * Wildcard entries (PCI_ANY_ID) should come last
  69  * Last entry must be all 0s
  70  *
  71  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  72  *   Class, Class Mask, private data (not used) }
  73  */
  74 static struct pci_device_id ixgbevf_pci_tbl[] = {
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF),
  76         board_82599_vf},
  77         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF),
  78         board_X540_vf},
  79
  80         /* required last entry */
  81         {0, }
  82 };
  83 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  84
  85 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  86 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
  87 MODULE_LICENSE("GPL");
  88 MODULE_VERSION(DRV_VERSION);
  89
  90 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  91
  92 /* forward decls */
  93 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector);
  94 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
  95                                u32 itr_reg);
  96
  97 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
  98                                            struct ixgbevf_ring *rx_ring,
  99                                            u32 val)
 100 {
 101         /*
 102          * Force memory writes to complete before letting h/w
 103          * know there are new descriptors to fetch.  (Only
 104          * applicable for weak-ordered memory model archs,
 105          * such as IA-64).
 106          */
 107         wmb();
 108         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 109 }
 110
 111 /*
 112  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 113  * @adapter: pointer to adapter struct
 114  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 115  * @queue: queue to map the corresponding interrupt to
 116  * @msix_vector: the vector to map to the corresponding queue
 117  *
 118  */
 119 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 120                              u8 queue, u8 msix_vector)
 121 {
 122         u32 ivar, index;
 123         struct ixgbe_hw *hw = &adapter->hw;
 124         if (direction == -1) {
 125                 /* other causes */
 126                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 127                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 128                 ivar &= ~0xFF;
 129                 ivar |= msix_vector;
 130                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 131         } else {
 132                 /* tx or rx causes */
 133                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 134                 index = ((16 * (queue & 1)) + (8 * direction));
 135                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 136                 ivar &= ~(0xFF << index);
 137                 ivar |= (msix_vector << index);
 138                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 139         }
 140 }
 141
 142 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_adapter *adapter,
 143                                                struct ixgbevf_tx_buffer
 144                                                *tx_buffer_info)
 145 {
 146         if (tx_buffer_info->dma) {
 147                 if (tx_buffer_info->mapped_as_page)
 148                         dma_unmap_page(&adapter->pdev->dev,
 149                                        tx_buffer_info->dma,
 150                                        tx_buffer_info->length,
 151                                        DMA_TO_DEVICE);
 152                 else
 153                         dma_unmap_single(&adapter->pdev->dev,
 154                                          tx_buffer_info->dma,
 155                                          tx_buffer_info->length,
 156                                          DMA_TO_DEVICE);
 157                 tx_buffer_info->dma = 0;
 158         }
 159         if (tx_buffer_info->skb) {
 160                 dev_kfree_skb_any(tx_buffer_info->skb);
 161                 tx_buffer_info->skb = NULL;
 162         }
 163         tx_buffer_info->time_stamp = 0;
 164         /* tx_buffer_info must be completely set up in the transmit path */
 165 }
 166
 167 #define IXGBE_MAX_TXD_PWR       14
 168 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 169
 170 /* Tx Descriptors needed, worst case */
 171 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 172                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 173 #ifdef MAX_SKB_FRAGS
 174 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 175         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)      /* for context */
 176 #else
 177 #define DESC_NEEDED TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD)
 178 #endif
 179
 180 static void ixgbevf_tx_timeout(struct net_device *netdev);
 181
 182 /**
 183  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 184  * @adapter: board private structure
 185  * @tx_ring: tx ring to clean
 186  **/
 187 static bool ixgbevf_clean_tx_irq(struct ixgbevf_adapter *adapter,
 188                                  struct ixgbevf_ring *tx_ring)
 189 {
 190         struct net_device *netdev = adapter->netdev;
 191         struct ixgbe_hw *hw = &adapter->hw;
 192         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 193         struct ixgbevf_tx_buffer *tx_buffer_info;
 194         unsigned int i, eop, count = 0;
 195         unsigned int total_bytes = 0, total_packets = 0;
 196
 197         i = tx_ring->next_to_clean;
 198         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 199         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 200
 201         while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
 202                (count < tx_ring->work_limit)) {
 203                 bool cleaned = false;
 204                 rmb(); /* read buffer_info after eop_desc */
 205                 for ( ; !cleaned; count++) {
 206                         struct sk_buff *skb;
 207                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 208                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 209                         cleaned = (i == eop);
 210                         skb = tx_buffer_info->skb;
 211
 212                         if (cleaned && skb) {
 213                                 unsigned int segs, bytecount;
 214
 215                                 /* gso_segs is currently only valid for tcp */
 216                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 217                                 /* multiply data chunks by size of headers */
 218                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 219                                             skb->len;
 220                                 total_packets += segs;
 221                                 total_bytes += bytecount;
 222                         }
 223
 224                         ixgbevf_unmap_and_free_tx_resource(adapter,
 225                                                            tx_buffer_info);
 226
 227                         tx_desc->wb.status = 0;
 228
 229                         i++;
 230                         if (i == tx_ring->count)
 231                                 i = 0;
 232                 }
 233
 234                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 235                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 236         }
 237
 238         tx_ring->next_to_clean = i;
 239
 240 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 241         if (unlikely(count && netif_carrier_ok(netdev) &&
 242                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 243                 /* Make sure that anybody stopping the queue after this
 244                  * sees the new next_to_clean.
 245                  */
 246                 smp_mb();
 247 #ifdef HAVE_TX_MQ
 248                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 249                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 250                         netif_wake_subqueue(netdev, tx_ring->queue_index);
 251                         ++adapter->restart_queue;
 252                 }
 253 #else
 254                 if (netif_queue_stopped(netdev) &&
 255                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 256                         netif_wake_queue(netdev);
 257                         ++adapter->restart_queue;
 258                 }
 259 #endif
 260         }
 261
 262         /* re-arm the interrupt */
 263         if ((count >= tx_ring->work_limit) &&
 264             (!test_bit(__IXGBEVF_DOWN, &adapter->state))) {
 265                 IXGBE_WRITE_REG(hw, IXGBE_VTEICS, tx_ring->v_idx);
 266         }
 267
 268         tx_ring->total_bytes += total_bytes;
 269         tx_ring->total_packets += total_packets;
 270
 271         netdev->stats.tx_bytes += total_bytes;
 272         netdev->stats.tx_packets += total_packets;
 273
 274         return count < tx_ring->work_limit;
 275 }
 276
 277 /**
 278  * ixgbevf_receive_skb - Send a completed packet up the stack
 279  * @q_vector: structure containing interrupt and ring information
 280  * @skb: packet to send up
 281  * @status: hardware indication of status of receive
 282  * @rx_ring: rx descriptor ring (for a specific queue) to setup
 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                                 struct ixgbevf_ring *ring,
 288                                 union ixgbe_adv_rx_desc *rx_desc)
 289 {
 290         struct ixgbevf_adapter *adapter = q_vector->adapter;
 291         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 292
 293         if (is_vlan) {
 294                 u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 295
 296                 __vlan_hwaccel_put_tag(skb, tag);
 297         }
 298
 299         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
 300                         napi_gro_receive(&q_vector->napi, skb);
 301         else
 302                         netif_rx(skb);
 303 }
 304
 305 /**
 306  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 307  * @adapter: address of board private structure
 308  * @status_err: hardware indication of status of receive
 309  * @skb: skb currently being received and modified
 310  **/
 311 static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter,
 312                                        u32 status_err, struct sk_buff *skb)
 313 {
 314         skb_checksum_none_assert(skb);
 315
 316         /* Rx csum disabled */
 317         if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 318                 return;
 319
 320         /* if IP and error */
 321         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 322             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 323                 adapter->hw_csum_rx_error++;
 324                 return;
 325         }
 326
 327         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 328                 return;
 329
 330         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 331                 adapter->hw_csum_rx_error++;
 332                 return;
 333         }
 334
 335         /* It must be a TCP or UDP packet with a valid checksum */
 336         skb->ip_summed = CHECKSUM_UNNECESSARY;
 337         adapter->hw_csum_rx_good++;
 338 }
 339
 340 /**
 341  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 342  * @adapter: address of board private structure
 343  **/
 344 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 345                                      struct ixgbevf_ring *rx_ring,
 346                                      int cleaned_count)
 347 {
 348         struct pci_dev *pdev = adapter->pdev;
 349         union ixgbe_adv_rx_desc *rx_desc;
 350         struct ixgbevf_rx_buffer *bi;
 351         struct sk_buff *skb;
 352         unsigned int i;
 353         unsigned int bufsz = rx_ring->rx_buf_len + NET_IP_ALIGN;
 354
 355         i = rx_ring->next_to_use;
 356         bi = &rx_ring->rx_buffer_info[i];
 357
 358         while (cleaned_count--) {
 359                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 360
 361                 if (!bi->page_dma &&
 362                     (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 363                         if (!bi->page) {
 364                                 bi->page = netdev_alloc_page(adapter->netdev);
 365                                 if (!bi->page) {
 366                                         adapter->alloc_rx_page_failed++;
 367                                         goto no_buffers;
 368                                 }
 369                                 bi->page_offset = 0;
 370                         } else {
 371                                 /* use a half page if we're re-using */
 372                                 bi->page_offset ^= (PAGE_SIZE / 2);
 373                         }
 374
 375                         bi->page_dma = dma_map_page(&pdev->dev, bi->page,
 376                                                     bi->page_offset,
 377                                                     (PAGE_SIZE / 2),
 378                                                     DMA_FROM_DEVICE);
 379                 }
 380
 381                 skb = bi->skb;
 382                 if (!skb) {
 383                         skb = netdev_alloc_skb(adapter->netdev,
 384                                                                bufsz);
 385
 386                         if (!skb) {
 387                                 adapter->alloc_rx_buff_failed++;
 388                                 goto no_buffers;
 389                         }
 390
 391                         /*
 392                          * Make buffer alignment 2 beyond a 16 byte boundary
 393                          * this will result in a 16 byte aligned IP header after
 394                          * the 14 byte MAC header is removed
 395                          */
 396                         skb_reserve(skb, NET_IP_ALIGN);
 397
 398                         bi->skb = skb;
 399                 }
 400                 if (!bi->dma) {
 401                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 402                                                  rx_ring->rx_buf_len,
 403                                                  DMA_FROM_DEVICE);
 404                 }
 405                 /* Refresh the desc even if buffer_addrs didn't change because
 406                  * each write-back erases this info. */
 407                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 408                         rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
 409                         rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
 410                 } else {
 411                         rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 412                 }
 413
 414                 i++;
 415                 if (i == rx_ring->count)
 416                         i = 0;
 417                 bi = &rx_ring->rx_buffer_info[i];
 418         }
 419
 420 no_buffers:
 421         if (rx_ring->next_to_use != i) {
 422                 rx_ring->next_to_use = i;
 423                 if (i-- == 0)
 424                         i = (rx_ring->count - 1);
 425
 426                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 427         }
 428 }
 429
 430 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 431                                              u64 qmask)
 432 {
 433         u32 mask;
 434         struct ixgbe_hw *hw = &adapter->hw;
 435
 436         mask = (qmask & 0xFFFFFFFF);
 437         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
 438 }
 439
 440 static inline u16 ixgbevf_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
 441 {
 442         return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
 443 }
 444
 445 static inline u16 ixgbevf_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
 446 {
 447         return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
 448 }
 449
 450 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 451                                  struct ixgbevf_ring *rx_ring,
 452                                  int *work_done, int work_to_do)
 453 {
 454         struct ixgbevf_adapter *adapter = q_vector->adapter;
 455         struct pci_dev *pdev = adapter->pdev;
 456         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 457         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 458         struct sk_buff *skb;
 459         unsigned int i;
 460         u32 len, staterr;
 461         u16 hdr_info;
 462         bool cleaned = false;
 463         int cleaned_count = 0;
 464         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 465
 466         i = rx_ring->next_to_clean;
 467         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 468         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 469         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 470
 471         while (staterr & IXGBE_RXD_STAT_DD) {
 472                 u32 upper_len = 0;
 473                 if (*work_done >= work_to_do)
 474                         break;
 475                 (*work_done)++;
 476
 477                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 478                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 479                         hdr_info = le16_to_cpu(ixgbevf_get_hdr_info(rx_desc));
 480                         len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 481                                IXGBE_RXDADV_HDRBUFLEN_SHIFT;
 482                         if (hdr_info & IXGBE_RXDADV_SPH)
 483                                 adapter->rx_hdr_split++;
 484                         if (len > IXGBEVF_RX_HDR_SIZE)
 485                                 len = IXGBEVF_RX_HDR_SIZE;
 486                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 487                 } else {
 488                         len = le16_to_cpu(rx_desc->wb.upper.length);
 489                 }
 490                 cleaned = true;
 491                 skb = rx_buffer_info->skb;
 492                 prefetch(skb->data - NET_IP_ALIGN);
 493                 rx_buffer_info->skb = NULL;
 494
 495                 if (rx_buffer_info->dma) {
 496                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 497                                          rx_ring->rx_buf_len,
 498                                          DMA_FROM_DEVICE);
 499                         rx_buffer_info->dma = 0;
 500                         skb_put(skb, len);
 501                 }
 502
 503                 if (upper_len) {
 504                         dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
 505                                        PAGE_SIZE / 2, DMA_FROM_DEVICE);
 506                         rx_buffer_info->page_dma = 0;
 507                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 508                                            rx_buffer_info->page,
 509                                            rx_buffer_info->page_offset,
 510                                            upper_len);
 511
 512                         if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
 513                             (page_count(rx_buffer_info->page) != 1))
 514                                 rx_buffer_info->page = NULL;
 515                         else
 516                                 get_page(rx_buffer_info->page);
 517
 518                         skb->len += upper_len;
 519                         skb->data_len += upper_len;
 520                         skb->truesize += upper_len;
 521                 }
 522
 523                 i++;
 524                 if (i == rx_ring->count)
 525                         i = 0;
 526
 527                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 528                 prefetch(next_rxd);
 529                 cleaned_count++;
 530
 531                 next_buffer = &rx_ring->rx_buffer_info[i];
 532
 533                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 534                         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 535                                 rx_buffer_info->skb = next_buffer->skb;
 536                                 rx_buffer_info->dma = next_buffer->dma;
 537                                 next_buffer->skb = skb;
 538                                 next_buffer->dma = 0;
 539                         } else {
 540                                 skb->next = next_buffer->skb;
 541                                 skb->next->prev = skb;
 542                         }
 543                         adapter->non_eop_descs++;
 544                         goto next_desc;
 545                 }
 546
 547                 /* ERR_MASK will only have valid bits if EOP set */
 548                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 549                         dev_kfree_skb_irq(skb);
 550                         goto next_desc;
 551                 }
 552
 553                 ixgbevf_rx_checksum(adapter, staterr, skb);
 554
 555                 /* probably a little skewed due to removing CRC */
 556                 total_rx_bytes += skb->len;
 557                 total_rx_packets++;
 558
 559                 /*
 560                  * Work around issue of some types of VM to VM loop back
 561                  * packets not getting split correctly
 562                  */
 563                 if (staterr & IXGBE_RXD_STAT_LB) {
 564                         u32 header_fixup_len = skb_headlen(skb);
 565                         if (header_fixup_len < 14)
 566                                 skb_push(skb, header_fixup_len);
 567                 }
 568                 skb->protocol = eth_type_trans(skb, adapter->netdev);
 569
 570                 ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
 571
 572 next_desc:
 573                 rx_desc->wb.upper.status_error = 0;
 574
 575                 /* return some buffers to hardware, one at a time is too slow */
 576                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 577                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 578                                                  cleaned_count);
 579                         cleaned_count = 0;
 580                 }
 581
 582                 /* use prefetched values */
 583                 rx_desc = next_rxd;
 584                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 585
 586                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 587         }
 588
 589         rx_ring->next_to_clean = i;
 590         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 591
 592         if (cleaned_count)
 593                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 594
 595         rx_ring->total_packets += total_rx_packets;
 596         rx_ring->total_bytes += total_rx_bytes;
 597         adapter->netdev->stats.rx_bytes += total_rx_bytes;
 598         adapter->netdev->stats.rx_packets += total_rx_packets;
 599
 600         return cleaned;
 601 }
 602
 603 /**
 604  * ixgbevf_clean_rxonly - msix (aka one shot) rx clean routine
 605  * @napi: napi struct with our devices info in it
 606  * @budget: amount of work driver is allowed to do this pass, in packets
 607  *
 608  * This function is optimized for cleaning one queue only on a single
 609  * q_vector!!!
 610  **/
 611 static int ixgbevf_clean_rxonly(struct napi_struct *napi, int budget)
 612 {
 613         struct ixgbevf_q_vector *q_vector =
 614                 container_of(napi, struct ixgbevf_q_vector, napi);
 615         struct ixgbevf_adapter *adapter = q_vector->adapter;
 616         struct ixgbevf_ring *rx_ring = NULL;
 617         int work_done = 0;
 618         long r_idx;
 619
 620         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 621         rx_ring = &(adapter->rx_ring[r_idx]);
 622
 623         ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
 624
 625         /* If all Rx work done, exit the polling mode */
 626         if (work_done < budget) {
 627                 napi_complete(napi);
 628                 if (adapter->itr_setting & 1)
 629                         ixgbevf_set_itr_msix(q_vector);
 630                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 631                         ixgbevf_irq_enable_queues(adapter, rx_ring->v_idx);
 632         }
 633
 634         return work_done;
 635 }
 636
 637 /**
 638  * ixgbevf_clean_rxonly_many - msix (aka one shot) rx clean routine
 639  * @napi: napi struct with our devices info in it
 640  * @budget: amount of work driver is allowed to do this pass, in packets
 641  *
 642  * This function will clean more than one rx queue associated with a
 643  * q_vector.
 644  **/
 645 static int ixgbevf_clean_rxonly_many(struct napi_struct *napi, int budget)
 646 {
 647         struct ixgbevf_q_vector *q_vector =
 648                 container_of(napi, struct ixgbevf_q_vector, napi);
 649         struct ixgbevf_adapter *adapter = q_vector->adapter;
 650         struct ixgbevf_ring *rx_ring = NULL;
 651         int work_done = 0, i;
 652         long r_idx;
 653         u64 enable_mask = 0;
 654
 655         /* attempt to distribute budget to each queue fairly, but don't allow
 656          * the budget to go below 1 because we'll exit polling */
 657         budget /= (q_vector->rxr_count ?: 1);
 658         budget = max(budget, 1);
 659         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 660         for (i = 0; i < q_vector->rxr_count; i++) {
 661                 rx_ring = &(adapter->rx_ring[r_idx]);
 662                 ixgbevf_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
 663                 enable_mask |= rx_ring->v_idx;
 664                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
 665                                       r_idx + 1);
 666         }
 667
 668 #ifndef HAVE_NETDEV_NAPI_LIST
 669         if (!netif_running(adapter->netdev))
 670                 work_done = 0;
 671
 672 #endif
 673         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 674         rx_ring = &(adapter->rx_ring[r_idx]);
 675
 676         /* If all Rx work done, exit the polling mode */
 677         if (work_done < budget) {
 678                 napi_complete(napi);
 679                 if (adapter->itr_setting & 1)
 680                         ixgbevf_set_itr_msix(q_vector);
 681                 if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 682                         ixgbevf_irq_enable_queues(adapter, enable_mask);
 683         }
 684
 685         return work_done;
 686 }
 687
 688
 689 /**
 690  * ixgbevf_configure_msix - Configure MSI-X hardware
 691  * @adapter: board private structure
 692  *
 693  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 694  * interrupts.
 695  **/
 696 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 697 {
 698         struct ixgbevf_q_vector *q_vector;
 699         struct ixgbe_hw *hw = &adapter->hw;
 700         int i, j, q_vectors, v_idx, r_idx;
 701         u32 mask;
 702
 703         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 704
 705         /*
 706          * Populate the IVAR table and set the ITR values to the
 707          * corresponding register.
 708          */
 709         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 710                 q_vector = adapter->q_vector[v_idx];
 711                 /* XXX for_each_set_bit(...) */
 712                 r_idx = find_first_bit(q_vector->rxr_idx,
 713                                        adapter->num_rx_queues);
 714
 715                 for (i = 0; i < q_vector->rxr_count; i++) {
 716                         j = adapter->rx_ring[r_idx].reg_idx;
 717                         ixgbevf_set_ivar(adapter, 0, j, v_idx);
 718                         r_idx = find_next_bit(q_vector->rxr_idx,
 719                                               adapter->num_rx_queues,
 720                                               r_idx + 1);
 721                 }
 722                 r_idx = find_first_bit(q_vector->txr_idx,
 723                                        adapter->num_tx_queues);
 724
 725                 for (i = 0; i < q_vector->txr_count; i++) {
 726                         j = adapter->tx_ring[r_idx].reg_idx;
 727                         ixgbevf_set_ivar(adapter, 1, j, v_idx);
 728                         r_idx = find_next_bit(q_vector->txr_idx,
 729                                               adapter->num_tx_queues,
 730                                               r_idx + 1);
 731                 }
 732
 733                 /* if this is a tx only vector halve the interrupt rate */
 734                 if (q_vector->txr_count && !q_vector->rxr_count)
 735                         q_vector->eitr = (adapter->eitr_param >> 1);
 736                 else if (q_vector->rxr_count)
 737                         /* rx only */
 738                         q_vector->eitr = adapter->eitr_param;
 739
 740                 ixgbevf_write_eitr(adapter, v_idx, q_vector->eitr);
 741         }
 742
 743         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 744
 745         /* set up to autoclear timer, and the vectors */
 746         mask = IXGBE_EIMS_ENABLE_MASK;
 747         mask &= ~IXGBE_EIMS_OTHER;
 748         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, mask);
 749 }
 750
 751 enum latency_range {
 752         lowest_latency = 0,
 753         low_latency = 1,
 754         bulk_latency = 2,
 755         latency_invalid = 255
 756 };
 757
 758 /**
 759  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 760  * @adapter: pointer to adapter
 761  * @eitr: eitr setting (ints per sec) to give last timeslice
 762  * @itr_setting: current throttle rate in ints/second
 763  * @packets: the number of packets during this measurement interval
 764  * @bytes: the number of bytes during this measurement interval
 765  *
 766  *      Stores a new ITR value based on packets and byte
 767  *      counts during the last interrupt.  The advantage of per interrupt
 768  *      computation is faster updates and more accurate ITR for the current
 769  *      traffic pattern.  Constants in this function were computed
 770  *      based on theoretical maximum wire speed and thresholds were set based
 771  *      on testing data as well as attempting to minimize response time
 772  *      while increasing bulk throughput.
 773  **/
 774 static u8 ixgbevf_update_itr(struct ixgbevf_adapter *adapter,
 775                              u32 eitr, u8 itr_setting,
 776                              int packets, int bytes)
 777 {
 778         unsigned int retval = itr_setting;
 779         u32 timepassed_us;
 780         u64 bytes_perint;
 781
 782         if (packets == 0)
 783                 goto update_itr_done;
 784
 785
 786         /* simple throttlerate management
 787          *    0-20MB/s lowest (100000 ints/s)
 788          *   20-100MB/s low   (20000 ints/s)
 789          *  100-1249MB/s bulk (8000 ints/s)
 790          */
 791         /* what was last interrupt timeslice? */
 792         timepassed_us = 1000000/eitr;
 793         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 794
 795         switch (itr_setting) {
 796         case lowest_latency:
 797                 if (bytes_perint > adapter->eitr_low)
 798                         retval = low_latency;
 799                 break;
 800         case low_latency:
 801                 if (bytes_perint > adapter->eitr_high)
 802                         retval = bulk_latency;
 803                 else if (bytes_perint <= adapter->eitr_low)
 804                         retval = lowest_latency;
 805                 break;
 806         case bulk_latency:
 807                 if (bytes_perint <= adapter->eitr_high)
 808                         retval = low_latency;
 809                 break;
 810         }
 811
 812 update_itr_done:
 813         return retval;
 814 }
 815
 816 /**
 817  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 818  * @adapter: pointer to adapter struct
 819  * @v_idx: vector index into q_vector array
 820  * @itr_reg: new value to be written in *register* format, not ints/s
 821  *
 822  * This function is made to be called by ethtool and by the driver
 823  * when it needs to update VTEITR registers at runtime.  Hardware
 824  * specific quirks/differences are taken care of here.
 825  */
 826 static void ixgbevf_write_eitr(struct ixgbevf_adapter *adapter, int v_idx,
 827                                u32 itr_reg)
 828 {
 829         struct ixgbe_hw *hw = &adapter->hw;
 830
 831         itr_reg = EITR_INTS_PER_SEC_TO_REG(itr_reg);
 832
 833         /*
 834          * set the WDIS bit to not clear the timer bits and cause an
 835          * immediate assertion of the interrupt
 836          */
 837         itr_reg |= IXGBE_EITR_CNT_WDIS;
 838
 839         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 840 }
 841
 842 static void ixgbevf_set_itr_msix(struct ixgbevf_q_vector *q_vector)
 843 {
 844         struct ixgbevf_adapter *adapter = q_vector->adapter;
 845         u32 new_itr;
 846         u8 current_itr, ret_itr;
 847         int i, r_idx, v_idx = q_vector->v_idx;
 848         struct ixgbevf_ring *rx_ring, *tx_ring;
 849
 850         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
 851         for (i = 0; i < q_vector->txr_count; i++) {
 852                 tx_ring = &(adapter->tx_ring[r_idx]);
 853                 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
 854                                              q_vector->tx_itr,
 855                                              tx_ring->total_packets,
 856                                              tx_ring->total_bytes);
 857                 /* if the result for this queue would decrease interrupt
 858                  * rate for this vector then use that result */
 859                 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
 860                                     q_vector->tx_itr - 1 : ret_itr);
 861                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
 862                                       r_idx + 1);
 863         }
 864
 865         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 866         for (i = 0; i < q_vector->rxr_count; i++) {
 867                 rx_ring = &(adapter->rx_ring[r_idx]);
 868                 ret_itr = ixgbevf_update_itr(adapter, q_vector->eitr,
 869                                              q_vector->rx_itr,
 870                                              rx_ring->total_packets,
 871                                              rx_ring->total_bytes);
 872                 /* if the result for this queue would decrease interrupt
 873                  * rate for this vector then use that result */
 874                 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
 875                                     q_vector->rx_itr - 1 : ret_itr);
 876                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
 877                                       r_idx + 1);
 878         }
 879
 880         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
 881
 882         switch (current_itr) {
 883         /* counts and packets in update_itr are dependent on these numbers */
 884         case lowest_latency:
 885                 new_itr = 100000;
 886                 break;
 887         case low_latency:
 888                 new_itr = 20000; /* aka hwitr = ~200 */
 889                 break;
 890         case bulk_latency:
 891         default:
 892                 new_itr = 8000;
 893                 break;
 894         }
 895
 896         if (new_itr != q_vector->eitr) {
 897                 u32 itr_reg;
 898
 899                 /* save the algorithm value here, not the smoothed one */
 900                 q_vector->eitr = new_itr;
 901                 /* do an exponential smoothing */
 902                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
 903                 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
 904                 ixgbevf_write_eitr(adapter, v_idx, itr_reg);
 905         }
 906 }
 907
 908 static irqreturn_t ixgbevf_msix_mbx(int irq, void *data)
 909 {
 910         struct net_device *netdev = data;
 911         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
 912         struct ixgbe_hw *hw = &adapter->hw;
 913         u32 eicr;
 914         u32 msg;
 915
 916         eicr = IXGBE_READ_REG(hw, IXGBE_VTEICS);
 917         IXGBE_WRITE_REG(hw, IXGBE_VTEICR, eicr);
 918
 919         if (!hw->mbx.ops.check_for_ack(hw)) {
 920                 /*
 921                  * checking for the ack clears the PFACK bit.  Place
 922                  * it back in the v2p_mailbox cache so that anyone
 923                  * polling for an ack will not miss it.  Also
 924                  * avoid the read below because the code to read
 925                  * the mailbox will also clear the ack bit.  This was
 926                  * causing lost acks.  Just cache the bit and exit
 927                  * the IRQ handler.
 928                  */
 929                 hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFACK;
 930                 goto out;
 931         }
 932
 933         /* Not an ack interrupt, go ahead and read the message */
 934         hw->mbx.ops.read(hw, &msg, 1);
 935
 936         if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG)
 937                 mod_timer(&adapter->watchdog_timer,
 938                           round_jiffies(jiffies + 1));
 939
 940 out:
 941         return IRQ_HANDLED;
 942 }
 943
 944 static irqreturn_t ixgbevf_msix_clean_tx(int irq, void *data)
 945 {
 946         struct ixgbevf_q_vector *q_vector = data;
 947         struct ixgbevf_adapter  *adapter = q_vector->adapter;
 948         struct ixgbevf_ring     *tx_ring;
 949         int i, r_idx;
 950
 951         if (!q_vector->txr_count)
 952                 return IRQ_HANDLED;
 953
 954         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
 955         for (i = 0; i < q_vector->txr_count; i++) {
 956                 tx_ring = &(adapter->tx_ring[r_idx]);
 957                 tx_ring->total_bytes = 0;
 958                 tx_ring->total_packets = 0;
 959                 ixgbevf_clean_tx_irq(adapter, tx_ring);
 960                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
 961                                       r_idx + 1);
 962         }
 963
 964         if (adapter->itr_setting & 1)
 965                 ixgbevf_set_itr_msix(q_vector);
 966
 967         return IRQ_HANDLED;
 968 }
 969
 970 /**
 971  * ixgbevf_msix_clean_rx - single unshared vector rx clean (all queues)
 972  * @irq: unused
 973  * @data: pointer to our q_vector struct for this interrupt vector
 974  **/
 975 static irqreturn_t ixgbevf_msix_clean_rx(int irq, void *data)
 976 {
 977         struct ixgbevf_q_vector *q_vector = data;
 978         struct ixgbevf_adapter  *adapter = q_vector->adapter;
 979         struct ixgbe_hw *hw = &adapter->hw;
 980         struct ixgbevf_ring  *rx_ring;
 981         int r_idx;
 982         int i;
 983
 984         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 985         for (i = 0; i < q_vector->rxr_count; i++) {
 986                 rx_ring = &(adapter->rx_ring[r_idx]);
 987                 rx_ring->total_bytes = 0;
 988                 rx_ring->total_packets = 0;
 989                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
 990                                       r_idx + 1);
 991         }
 992
 993         if (!q_vector->rxr_count)
 994                 return IRQ_HANDLED;
 995
 996         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 997         rx_ring = &(adapter->rx_ring[r_idx]);
 998         /* disable interrupts on this vector only */
 999         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, rx_ring->v_idx);
1000         napi_schedule(&q_vector->napi);
1001
1002
1003         return IRQ_HANDLED;
1004 }
1005
1006 static irqreturn_t ixgbevf_msix_clean_many(int irq, void *data)
1007 {
1008         ixgbevf_msix_clean_rx(irq, data);
1009         ixgbevf_msix_clean_tx(irq, data);
1010
1011         return IRQ_HANDLED;
1012 }
1013
1014 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
1015                                      int r_idx)
1016 {
1017         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1018
1019         set_bit(r_idx, q_vector->rxr_idx);
1020         q_vector->rxr_count++;
1021         a->rx_ring[r_idx].v_idx = 1 << v_idx;
1022 }
1023
1024 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
1025                                      int t_idx)
1026 {
1027         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
1028
1029         set_bit(t_idx, q_vector->txr_idx);
1030         q_vector->txr_count++;
1031         a->tx_ring[t_idx].v_idx = 1 << v_idx;
1032 }
1033
1034 /**
1035  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
1036  * @adapter: board private structure to initialize
1037  *
1038  * This function maps descriptor rings to the queue-specific vectors
1039  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
1040  * one vector per ring/queue, but on a constrained vector budget, we
1041  * group the rings as "efficiently" as possible.  You would add new
1042  * mapping configurations in here.
1043  **/
1044 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
1045 {
1046         int q_vectors;
1047         int v_start = 0;
1048         int rxr_idx = 0, txr_idx = 0;
1049         int rxr_remaining = adapter->num_rx_queues;
1050         int txr_remaining = adapter->num_tx_queues;
1051         int i, j;
1052         int rqpv, tqpv;
1053         int err = 0;
1054
1055         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1056
1057         /*
1058          * The ideal configuration...
1059          * We have enough vectors to map one per queue.
1060          */
1061         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1062                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1063                         map_vector_to_rxq(adapter, v_start, rxr_idx);
1064
1065                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1066                         map_vector_to_txq(adapter, v_start, txr_idx);
1067                 goto out;
1068         }
1069
1070         /*
1071          * If we don't have enough vectors for a 1-to-1
1072          * mapping, we'll have to group them so there are
1073          * multiple queues per vector.
1074          */
1075         /* Re-adjusting *qpv takes care of the remainder. */
1076         for (i = v_start; i < q_vectors; i++) {
1077                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
1078                 for (j = 0; j < rqpv; j++) {
1079                         map_vector_to_rxq(adapter, i, rxr_idx);
1080                         rxr_idx++;
1081                         rxr_remaining--;
1082                 }
1083         }
1084         for (i = v_start; i < q_vectors; i++) {
1085                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
1086                 for (j = 0; j < tqpv; j++) {
1087                         map_vector_to_txq(adapter, i, txr_idx);
1088                         txr_idx++;
1089                         txr_remaining--;
1090                 }
1091         }
1092
1093 out:
1094         return err;
1095 }
1096
1097 /**
1098  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
1099  * @adapter: board private structure
1100  *
1101  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
1102  * interrupts from the kernel.
1103  **/
1104 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
1105 {
1106         struct net_device *netdev = adapter->netdev;
1107         irqreturn_t (*handler)(int, void *);
1108         int i, vector, q_vectors, err;
1109         int ri = 0, ti = 0;
1110
1111         /* Decrement for Other and TCP Timer vectors */
1112         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1113
1114 #define SET_HANDLER(_v) (((_v)->rxr_count && (_v)->txr_count)          \
1115                                           ? &ixgbevf_msix_clean_many : \
1116                           (_v)->rxr_count ? &ixgbevf_msix_clean_rx   : \
1117                           (_v)->txr_count ? &ixgbevf_msix_clean_tx   : \
1118                           NULL)
1119         for (vector = 0; vector < q_vectors; vector++) {
1120                 handler = SET_HANDLER(adapter->q_vector[vector]);
1121
1122                 if (handler == &ixgbevf_msix_clean_rx) {
1123                         sprintf(adapter->name[vector], "%s-%s-%d",
1124                                 netdev->name, "rx", ri++);
1125                 } else if (handler == &ixgbevf_msix_clean_tx) {
1126                         sprintf(adapter->name[vector], "%s-%s-%d",
1127                                 netdev->name, "tx", ti++);
1128                 } else if (handler == &ixgbevf_msix_clean_many) {
1129                         sprintf(adapter->name[vector], "%s-%s-%d",
1130                                 netdev->name, "TxRx", vector);
1131                 } else {
1132                         /* skip this unused q_vector */
1133                         continue;
1134                 }
1135                 err = request_irq(adapter->msix_entries[vector].vector,
1136                                   handler, 0, adapter->name[vector],
1137                                   adapter->q_vector[vector]);
1138                 if (err) {
1139                         hw_dbg(&adapter->hw,
1140                                "request_irq failed for MSIX interrupt "
1141                                "Error: %d\n", err);
1142                         goto free_queue_irqs;
1143                 }
1144         }
1145
1146         sprintf(adapter->name[vector], "%s:mbx", netdev->name);
1147         err = request_irq(adapter->msix_entries[vector].vector,
1148                           &ixgbevf_msix_mbx, 0, adapter->name[vector], netdev);
1149         if (err) {
1150                 hw_dbg(&adapter->hw,
1151                        "request_irq for msix_mbx failed: %d\n", err);
1152                 goto free_queue_irqs;
1153         }
1154
1155         return 0;
1156
1157 free_queue_irqs:
1158         for (i = vector - 1; i >= 0; i--)
1159                 free_irq(adapter->msix_entries[--vector].vector,
1160                          &(adapter->q_vector[i]));
1161         pci_disable_msix(adapter->pdev);
1162         kfree(adapter->msix_entries);
1163         adapter->msix_entries = NULL;
1164         return err;
1165 }
1166
1167 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
1168 {
1169         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1170
1171         for (i = 0; i < q_vectors; i++) {
1172                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
1173                 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1174                 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1175                 q_vector->rxr_count = 0;
1176                 q_vector->txr_count = 0;
1177                 q_vector->eitr = adapter->eitr_param;
1178         }
1179 }
1180
1181 /**
1182  * ixgbevf_request_irq - initialize interrupts
1183  * @adapter: board private structure
1184  *
1185  * Attempts to configure interrupts using the best available
1186  * capabilities of the hardware and kernel.
1187  **/
1188 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
1189 {
1190         int err = 0;
1191
1192         err = ixgbevf_request_msix_irqs(adapter);
1193
1194         if (err)
1195                 hw_dbg(&adapter->hw,
1196                        "request_irq failed, Error %d\n", err);
1197
1198         return err;
1199 }
1200
1201 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
1202 {
1203         struct net_device *netdev = adapter->netdev;
1204         int i, q_vectors;
1205
1206         q_vectors = adapter->num_msix_vectors;
1207
1208         i = q_vectors - 1;
1209
1210         free_irq(adapter->msix_entries[i].vector, netdev);
1211         i--;
1212
1213         for (; i >= 0; i--) {
1214                 free_irq(adapter->msix_entries[i].vector,
1215                          adapter->q_vector[i]);
1216         }
1217
1218         ixgbevf_reset_q_vectors(adapter);
1219 }
1220
1221 /**
1222  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1223  * @adapter: board private structure
1224  **/
1225 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1226 {
1227         int i;
1228         struct ixgbe_hw *hw = &adapter->hw;
1229
1230         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1231
1232         IXGBE_WRITE_FLUSH(hw);
1233
1234         for (i = 0; i < adapter->num_msix_vectors; i++)
1235                 synchronize_irq(adapter->msix_entries[i].vector);
1236 }
1237
1238 /**
1239  * ixgbevf_irq_enable - Enable default interrupt generation settings
1240  * @adapter: board private structure
1241  **/
1242 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter,
1243                                       bool queues, bool flush)
1244 {
1245         struct ixgbe_hw *hw = &adapter->hw;
1246         u32 mask;
1247         u64 qmask;
1248
1249         mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1250         qmask = ~0;
1251
1252         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, mask);
1253
1254         if (queues)
1255                 ixgbevf_irq_enable_queues(adapter, qmask);
1256
1257         if (flush)
1258                 IXGBE_WRITE_FLUSH(hw);
1259 }
1260
1261 /**
1262  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1263  * @adapter: board private structure
1264  *
1265  * Configure the Tx unit of the MAC after a reset.
1266  **/
1267 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1268 {
1269         u64 tdba;
1270         struct ixgbe_hw *hw = &adapter->hw;
1271         u32 i, j, tdlen, txctrl;
1272
1273         /* Setup the HW Tx Head and Tail descriptor pointers */
1274         for (i = 0; i < adapter->num_tx_queues; i++) {
1275                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1276                 j = ring->reg_idx;
1277                 tdba = ring->dma;
1278                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1279                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1280                                 (tdba & DMA_BIT_MASK(32)));
1281                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1282                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1283                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1284                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1285                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1286                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1287                 /* Disable Tx Head Writeback RO bit, since this hoses
1288                  * bookkeeping if things aren't delivered in order.
1289                  */
1290                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1291                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1292                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1293         }
1294 }
1295
1296 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1297
1298 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1299 {
1300         struct ixgbevf_ring *rx_ring;
1301         struct ixgbe_hw *hw = &adapter->hw;
1302         u32 srrctl;
1303
1304         rx_ring = &adapter->rx_ring[index];
1305
1306         srrctl = IXGBE_SRRCTL_DROP_EN;
1307
1308         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1309                 u16 bufsz = IXGBEVF_RXBUFFER_2048;
1310                 /* grow the amount we can receive on large page machines */
1311                 if (bufsz < (PAGE_SIZE / 2))
1312                         bufsz = (PAGE_SIZE / 2);
1313                 /* cap the bufsz at our largest descriptor size */
1314                 bufsz = min((u16)IXGBEVF_MAX_RXBUFFER, bufsz);
1315
1316                 srrctl |= bufsz >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1317                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1318                 srrctl |= ((IXGBEVF_RX_HDR_SIZE <<
1319                            IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1320                            IXGBE_SRRCTL_BSIZEHDR_MASK);
1321         } else {
1322                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1323
1324                 if (rx_ring->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1325                         srrctl |= IXGBEVF_RXBUFFER_2048 >>
1326                                 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1327                 else
1328                         srrctl |= rx_ring->rx_buf_len >>
1329                                 IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1330         }
1331         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1332 }
1333
1334 /**
1335  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1336  * @adapter: board private structure
1337  *
1338  * Configure the Rx unit of the MAC after a reset.
1339  **/
1340 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1341 {
1342         u64 rdba;
1343         struct ixgbe_hw *hw = &adapter->hw;
1344         struct net_device *netdev = adapter->netdev;
1345         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1346         int i, j;
1347         u32 rdlen;
1348         int rx_buf_len;
1349
1350         /* Decide whether to use packet split mode or not */
1351         if (netdev->mtu > ETH_DATA_LEN) {
1352                 if (adapter->flags & IXGBE_FLAG_RX_PS_CAPABLE)
1353                         adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1354                 else
1355                         adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1356         } else {
1357                 if (adapter->flags & IXGBE_FLAG_RX_1BUF_CAPABLE)
1358                         adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1359                 else
1360                         adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1361         }
1362
1363         /* Set the RX buffer length according to the mode */
1364         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1365                 /* PSRTYPE must be initialized in 82599 */
1366                 u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
1367                         IXGBE_PSRTYPE_UDPHDR |
1368                         IXGBE_PSRTYPE_IPV4HDR |
1369                         IXGBE_PSRTYPE_IPV6HDR |
1370                         IXGBE_PSRTYPE_L2HDR;
1371                 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1372                 rx_buf_len = IXGBEVF_RX_HDR_SIZE;
1373         } else {
1374                 IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1375                 if (netdev->mtu <= ETH_DATA_LEN)
1376                         rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1377                 else
1378                         rx_buf_len = ALIGN(max_frame, 1024);
1379         }
1380
1381         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1382         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1383          * the Base and Length of the Rx Descriptor Ring */
1384         for (i = 0; i < adapter->num_rx_queues; i++) {
1385                 rdba = adapter->rx_ring[i].dma;
1386                 j = adapter->rx_ring[i].reg_idx;
1387                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1388                                 (rdba & DMA_BIT_MASK(32)));
1389                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1390                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1391                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1392                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1393                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1394                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1395                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1396
1397                 ixgbevf_configure_srrctl(adapter, j);
1398         }
1399 }
1400
1401 static void ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1402 {
1403         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1404         struct ixgbe_hw *hw = &adapter->hw;
1405
1406         /* add VID to filter table */
1407         if (hw->mac.ops.set_vfta)
1408                 hw->mac.ops.set_vfta(hw, vid, 0, true);
1409         set_bit(vid, adapter->active_vlans);
1410 }
1411
1412 static void ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1413 {
1414         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1415         struct ixgbe_hw *hw = &adapter->hw;
1416
1417         /* remove VID from filter table */
1418         if (hw->mac.ops.set_vfta)
1419                 hw->mac.ops.set_vfta(hw, vid, 0, false);
1420         clear_bit(vid, adapter->active_vlans);
1421 }
1422
1423 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1424 {
1425         u16 vid;
1426
1427         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1428                 ixgbevf_vlan_rx_add_vid(adapter->netdev, vid);
1429 }
1430
1431 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1432 {
1433         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1434         struct ixgbe_hw *hw = &adapter->hw;
1435         int count = 0;
1436
1437         if ((netdev_uc_count(netdev)) > 10) {
1438                 printk(KERN_ERR "Too many unicast filters - No Space\n");
1439                 return -ENOSPC;
1440         }
1441
1442         if (!netdev_uc_empty(netdev)) {
1443                 struct netdev_hw_addr *ha;
1444                 netdev_for_each_uc_addr(ha, netdev) {
1445                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1446                         udelay(200);
1447                 }
1448         } else {
1449                 /*
1450                  * If the list is empty then send message to PF driver to
1451                  * clear all macvlans on this VF.
1452                  */
1453                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1454         }
1455
1456         return count;
1457 }
1458
1459 /**
1460  * ixgbevf_set_rx_mode - Multicast set
1461  * @netdev: network interface device structure
1462  *
1463  * The set_rx_method entry point is called whenever the multicast address
1464  * list or the network interface flags are updated.  This routine is
1465  * responsible for configuring the hardware for proper multicast mode.
1466  **/
1467 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1468 {
1469         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1470         struct ixgbe_hw *hw = &adapter->hw;
1471
1472         /* reprogram multicast list */
1473         if (hw->mac.ops.update_mc_addr_list)
1474                 hw->mac.ops.update_mc_addr_list(hw, netdev);
1475
1476         ixgbevf_write_uc_addr_list(netdev);
1477 }
1478
1479 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1480 {
1481         int q_idx;
1482         struct ixgbevf_q_vector *q_vector;
1483         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1484
1485         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1486                 struct napi_struct *napi;
1487                 q_vector = adapter->q_vector[q_idx];
1488                 if (!q_vector->rxr_count)
1489                         continue;
1490                 napi = &q_vector->napi;
1491                 if (q_vector->rxr_count > 1)
1492                         napi->poll = &ixgbevf_clean_rxonly_many;
1493
1494                 napi_enable(napi);
1495         }
1496 }
1497
1498 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1499 {
1500         int q_idx;
1501         struct ixgbevf_q_vector *q_vector;
1502         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1503
1504         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1505                 q_vector = adapter->q_vector[q_idx];
1506                 if (!q_vector->rxr_count)
1507                         continue;
1508                 napi_disable(&q_vector->napi);
1509         }
1510 }
1511
1512 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1513 {
1514         struct net_device *netdev = adapter->netdev;
1515         int i;
1516
1517         ixgbevf_set_rx_mode(netdev);
1518
1519         ixgbevf_restore_vlan(adapter);
1520
1521         ixgbevf_configure_tx(adapter);
1522         ixgbevf_configure_rx(adapter);
1523         for (i = 0; i < adapter->num_rx_queues; i++) {
1524                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1525                 ixgbevf_alloc_rx_buffers(adapter, ring, ring->count);
1526                 ring->next_to_use = ring->count - 1;
1527                 writel(ring->next_to_use, adapter->hw.hw_addr + ring->tail);
1528         }
1529 }
1530
1531 #define IXGBE_MAX_RX_DESC_POLL 10
1532 static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1533                                                 int rxr)
1534 {
1535         struct ixgbe_hw *hw = &adapter->hw;
1536         int j = adapter->rx_ring[rxr].reg_idx;
1537         int k;
1538
1539         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
1540                 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
1541                         break;
1542                 else
1543                         msleep(1);
1544         }
1545         if (k >= IXGBE_MAX_RX_DESC_POLL) {
1546                 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d "
1547                        "not set within the polling period\n", rxr);
1548         }
1549
1550         ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1551                                 (adapter->rx_ring[rxr].count - 1));
1552 }
1553
1554 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1555 {
1556         /* Only save pre-reset stats if there are some */
1557         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1558                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1559                         adapter->stats.base_vfgprc;
1560                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1561                         adapter->stats.base_vfgptc;
1562                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1563                         adapter->stats.base_vfgorc;
1564                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1565                         adapter->stats.base_vfgotc;
1566                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1567                         adapter->stats.base_vfmprc;
1568         }
1569 }
1570
1571 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1572 {
1573         struct ixgbe_hw *hw = &adapter->hw;
1574
1575         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1576         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1577         adapter->stats.last_vfgorc |=
1578                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1579         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1580         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1581         adapter->stats.last_vfgotc |=
1582                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1583         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1584
1585         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1586         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1587         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1588         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1589         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1590 }
1591
1592 static int ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1593 {
1594         struct net_device *netdev = adapter->netdev;
1595         struct ixgbe_hw *hw = &adapter->hw;
1596         int i, j = 0;
1597         int num_rx_rings = adapter->num_rx_queues;
1598         u32 txdctl, rxdctl;
1599
1600         for (i = 0; i < adapter->num_tx_queues; i++) {
1601                 j = adapter->tx_ring[i].reg_idx;
1602                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1603                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1604                 txdctl |= (8 << 16);
1605                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1606         }
1607
1608         for (i = 0; i < adapter->num_tx_queues; i++) {
1609                 j = adapter->tx_ring[i].reg_idx;
1610                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1611                 txdctl |= IXGBE_TXDCTL_ENABLE;
1612                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1613         }
1614
1615         for (i = 0; i < num_rx_rings; i++) {
1616                 j = adapter->rx_ring[i].reg_idx;
1617                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1618                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1619                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1620                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1621                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1622                                    IXGBE_RXDCTL_RLPML_EN);
1623                 }
1624                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1625                 ixgbevf_rx_desc_queue_enable(adapter, i);
1626         }
1627
1628         ixgbevf_configure_msix(adapter);
1629
1630         if (hw->mac.ops.set_rar) {
1631                 if (is_valid_ether_addr(hw->mac.addr))
1632                         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1633                 else
1634                         hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1635         }
1636
1637         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1638         ixgbevf_napi_enable_all(adapter);
1639
1640         /* enable transmits */
1641         netif_tx_start_all_queues(netdev);
1642
1643         ixgbevf_save_reset_stats(adapter);
1644         ixgbevf_init_last_counter_stats(adapter);
1645
1646         /* bring the link up in the watchdog, this could race with our first
1647          * link up interrupt but shouldn't be a problem */
1648         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1649         adapter->link_check_timeout = jiffies;
1650         mod_timer(&adapter->watchdog_timer, jiffies);
1651         return 0;
1652 }
1653
1654 int ixgbevf_up(struct ixgbevf_adapter *adapter)
1655 {
1656         int err;
1657         struct ixgbe_hw *hw = &adapter->hw;
1658
1659         ixgbevf_configure(adapter);
1660
1661         err = ixgbevf_up_complete(adapter);
1662
1663         /* clear any pending interrupts, may auto mask */
1664         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1665
1666         ixgbevf_irq_enable(adapter, true, true);
1667
1668         return err;
1669 }
1670
1671 /**
1672  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1673  * @adapter: board private structure
1674  * @rx_ring: ring to free buffers from
1675  **/
1676 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1677                                   struct ixgbevf_ring *rx_ring)
1678 {
1679         struct pci_dev *pdev = adapter->pdev;
1680         unsigned long size;
1681         unsigned int i;
1682
1683         if (!rx_ring->rx_buffer_info)
1684                 return;
1685
1686         /* Free all the Rx ring sk_buffs */
1687         for (i = 0; i < rx_ring->count; i++) {
1688                 struct ixgbevf_rx_buffer *rx_buffer_info;
1689
1690                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1691                 if (rx_buffer_info->dma) {
1692                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1693                                          rx_ring->rx_buf_len,
1694                                          DMA_FROM_DEVICE);
1695                         rx_buffer_info->dma = 0;
1696                 }
1697                 if (rx_buffer_info->skb) {
1698                         struct sk_buff *skb = rx_buffer_info->skb;
1699                         rx_buffer_info->skb = NULL;
1700                         do {
1701                                 struct sk_buff *this = skb;
1702                                 skb = skb->prev;
1703                                 dev_kfree_skb(this);
1704                         } while (skb);
1705                 }
1706                 if (!rx_buffer_info->page)
1707                         continue;
1708                 dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
1709                                PAGE_SIZE / 2, DMA_FROM_DEVICE);
1710                 rx_buffer_info->page_dma = 0;
1711                 put_page(rx_buffer_info->page);
1712                 rx_buffer_info->page = NULL;
1713                 rx_buffer_info->page_offset = 0;
1714         }
1715
1716         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1717         memset(rx_ring->rx_buffer_info, 0, size);
1718
1719         /* Zero out the descriptor ring */
1720         memset(rx_ring->desc, 0, rx_ring->size);
1721
1722         rx_ring->next_to_clean = 0;
1723         rx_ring->next_to_use = 0;
1724
1725         if (rx_ring->head)
1726                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1727         if (rx_ring->tail)
1728                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1729 }
1730
1731 /**
1732  * ixgbevf_clean_tx_ring - Free Tx Buffers
1733  * @adapter: board private structure
1734  * @tx_ring: ring to be cleaned
1735  **/
1736 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1737                                   struct ixgbevf_ring *tx_ring)
1738 {
1739         struct ixgbevf_tx_buffer *tx_buffer_info;
1740         unsigned long size;
1741         unsigned int i;
1742
1743         if (!tx_ring->tx_buffer_info)
1744                 return;
1745
1746         /* Free all the Tx ring sk_buffs */
1747
1748         for (i = 0; i < tx_ring->count; i++) {
1749                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1750                 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1751         }
1752
1753         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1754         memset(tx_ring->tx_buffer_info, 0, size);
1755
1756         memset(tx_ring->desc, 0, tx_ring->size);
1757
1758         tx_ring->next_to_use = 0;
1759         tx_ring->next_to_clean = 0;
1760
1761         if (tx_ring->head)
1762                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1763         if (tx_ring->tail)
1764                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1765 }
1766
1767 /**
1768  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1769  * @adapter: board private structure
1770  **/
1771 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1772 {
1773         int i;
1774
1775         for (i = 0; i < adapter->num_rx_queues; i++)
1776                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1777 }
1778
1779 /**
1780  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1781  * @adapter: board private structure
1782  **/
1783 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1784 {
1785         int i;
1786
1787         for (i = 0; i < adapter->num_tx_queues; i++)
1788                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1789 }
1790
1791 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1792 {
1793         struct net_device *netdev = adapter->netdev;
1794         struct ixgbe_hw *hw = &adapter->hw;
1795         u32 txdctl;
1796         int i, j;
1797
1798         /* signal that we are down to the interrupt handler */
1799         set_bit(__IXGBEVF_DOWN, &adapter->state);
1800         /* disable receives */
1801
1802         netif_tx_disable(netdev);
1803
1804         msleep(10);
1805
1806         netif_tx_stop_all_queues(netdev);
1807
1808         ixgbevf_irq_disable(adapter);
1809
1810         ixgbevf_napi_disable_all(adapter);
1811
1812         del_timer_sync(&adapter->watchdog_timer);
1813         /* can't call flush scheduled work here because it can deadlock
1814          * if linkwatch_event tries to acquire the rtnl_lock which we are
1815          * holding */
1816         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1817                 msleep(1);
1818
1819         /* disable transmits in the hardware now that interrupts are off */
1820         for (i = 0; i < adapter->num_tx_queues; i++) {
1821                 j = adapter->tx_ring[i].reg_idx;
1822                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1823                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1824                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1825         }
1826
1827         netif_carrier_off(netdev);
1828
1829         if (!pci_channel_offline(adapter->pdev))
1830                 ixgbevf_reset(adapter);
1831
1832         ixgbevf_clean_all_tx_rings(adapter);
1833         ixgbevf_clean_all_rx_rings(adapter);
1834 }
1835
1836 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1837 {
1838         struct ixgbe_hw *hw = &adapter->hw;
1839
1840         WARN_ON(in_interrupt());
1841
1842         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1843                 msleep(1);
1844
1845         /*
1846          * Check if PF is up before re-init.  If not then skip until
1847          * later when the PF is up and ready to service requests from
1848          * the VF via mailbox.  If the VF is up and running then the
1849          * watchdog task will continue to schedule reset tasks until
1850          * the PF is up and running.
1851          */
1852         if (!hw->mac.ops.reset_hw(hw)) {
1853                 ixgbevf_down(adapter);
1854                 ixgbevf_up(adapter);
1855         }
1856
1857         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1858 }
1859
1860 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1861 {
1862         struct ixgbe_hw *hw = &adapter->hw;
1863         struct net_device *netdev = adapter->netdev;
1864
1865         if (hw->mac.ops.reset_hw(hw))
1866                 hw_dbg(hw, "PF still resetting\n");
1867         else
1868                 hw->mac.ops.init_hw(hw);
1869
1870         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1871                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1872                        netdev->addr_len);
1873                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1874                        netdev->addr_len);
1875         }
1876 }
1877
1878 static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1879                                          int vectors)
1880 {
1881         int err, vector_threshold;
1882
1883         /* We'll want at least 3 (vector_threshold):
1884          * 1) TxQ[0] Cleanup
1885          * 2) RxQ[0] Cleanup
1886          * 3) Other (Link Status Change, etc.)
1887          */
1888         vector_threshold = MIN_MSIX_COUNT;
1889
1890         /* The more we get, the more we will assign to Tx/Rx Cleanup
1891          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1892          * Right now, we simply care about how many we'll get; we'll
1893          * set them up later while requesting irq's.
1894          */
1895         while (vectors >= vector_threshold) {
1896                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1897                                       vectors);
1898                 if (!err) /* Success in acquiring all requested vectors. */
1899                         break;
1900                 else if (err < 0)
1901                         vectors = 0; /* Nasty failure, quit now */
1902                 else /* err == number of vectors we should try again with */
1903                         vectors = err;
1904         }
1905
1906         if (vectors < vector_threshold) {
1907                 /* Can't allocate enough MSI-X interrupts?  Oh well.
1908                  * This just means we'll go with either a single MSI
1909                  * vector or fall back to legacy interrupts.
1910                  */
1911                 hw_dbg(&adapter->hw,
1912                        "Unable to allocate MSI-X interrupts\n");
1913                 kfree(adapter->msix_entries);
1914                 adapter->msix_entries = NULL;
1915         } else {
1916                 /*
1917                  * Adjust for only the vectors we'll use, which is minimum
1918                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1919                  * vectors we were allocated.
1920                  */
1921                 adapter->num_msix_vectors = vectors;
1922         }
1923 }
1924
1925 /*
1926  * ixgbevf_set_num_queues: Allocate queues for device, feature dependent
1927  * @adapter: board private structure to initialize
1928  *
1929  * This is the top level queue allocation routine.  The order here is very
1930  * important, starting with the "most" number of features turned on at once,
1931  * and ending with the smallest set of features.  This way large combinations
1932  * can be allocated if they're turned on, and smaller combinations are the
1933  * fallthrough conditions.
1934  *
1935  **/
1936 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1937 {
1938         /* Start with base case */
1939         adapter->num_rx_queues = 1;
1940         adapter->num_tx_queues = 1;
1941         adapter->num_rx_pools = adapter->num_rx_queues;
1942         adapter->num_rx_queues_per_pool = 1;
1943 }
1944
1945 /**
1946  * ixgbevf_alloc_queues - Allocate memory for all rings
1947  * @adapter: board private structure to initialize
1948  *
1949  * We allocate one ring per queue at run-time since we don't know the
1950  * number of queues at compile-time.  The polling_netdev array is
1951  * intended for Multiqueue, but should work fine with a single queue.
1952  **/
1953 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1954 {
1955         int i;
1956
1957         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1958                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1959         if (!adapter->tx_ring)
1960                 goto err_tx_ring_allocation;
1961
1962         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1963                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1964         if (!adapter->rx_ring)
1965                 goto err_rx_ring_allocation;
1966
1967         for (i = 0; i < adapter->num_tx_queues; i++) {
1968                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1969                 adapter->tx_ring[i].queue_index = i;
1970                 adapter->tx_ring[i].reg_idx = i;
1971         }
1972
1973         for (i = 0; i < adapter->num_rx_queues; i++) {
1974                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1975                 adapter->rx_ring[i].queue_index = i;
1976                 adapter->rx_ring[i].reg_idx = i;
1977         }
1978
1979         return 0;
1980
1981 err_rx_ring_allocation:
1982         kfree(adapter->tx_ring);
1983 err_tx_ring_allocation:
1984         return -ENOMEM;
1985 }
1986
1987 /**
1988  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1989  * @adapter: board private structure to initialize
1990  *
1991  * Attempt to configure the interrupts using the best available
1992  * capabilities of the hardware and the kernel.
1993  **/
1994 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1995 {
1996         int err = 0;
1997         int vector, v_budget;
1998
1999         /*
2000          * It's easy to be greedy for MSI-X vectors, but it really
2001          * doesn't do us much good if we have a lot more vectors
2002          * than CPU's.  So let's be conservative and only ask for
2003          * (roughly) twice the number of vectors as there are CPU's.
2004          */
2005         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
2006                        (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
2007
2008         /* A failure in MSI-X entry allocation isn't fatal, but it does
2009          * mean we disable MSI-X capabilities of the adapter. */
2010         adapter->msix_entries = kcalloc(v_budget,
2011                                         sizeof(struct msix_entry), GFP_KERNEL);
2012         if (!adapter->msix_entries) {
2013                 err = -ENOMEM;
2014                 goto out;
2015         }
2016
2017         for (vector = 0; vector < v_budget; vector++)
2018                 adapter->msix_entries[vector].entry = vector;
2019
2020         ixgbevf_acquire_msix_vectors(adapter, v_budget);
2021
2022 out:
2023         return err;
2024 }
2025
2026 /**
2027  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
2028  * @adapter: board private structure to initialize
2029  *
2030  * We allocate one q_vector per queue interrupt.  If allocation fails we
2031  * return -ENOMEM.
2032  **/
2033 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
2034 {
2035         int q_idx, num_q_vectors;
2036         struct ixgbevf_q_vector *q_vector;
2037         int napi_vectors;
2038         int (*poll)(struct napi_struct *, int);
2039
2040         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2041         napi_vectors = adapter->num_rx_queues;
2042         poll = &ixgbevf_clean_rxonly;
2043
2044         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2045                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
2046                 if (!q_vector)
2047                         goto err_out;
2048                 q_vector->adapter = adapter;
2049                 q_vector->v_idx = q_idx;
2050                 q_vector->eitr = adapter->eitr_param;
2051                 if (q_idx < napi_vectors)
2052                         netif_napi_add(adapter->netdev, &q_vector->napi,
2053                                        (*poll), 64);
2054                 adapter->q_vector[q_idx] = q_vector;
2055         }
2056
2057         return 0;
2058
2059 err_out:
2060         while (q_idx) {
2061                 q_idx--;
2062                 q_vector = adapter->q_vector[q_idx];
2063                 netif_napi_del(&q_vector->napi);
2064                 kfree(q_vector);
2065                 adapter->q_vector[q_idx] = NULL;
2066         }
2067         return -ENOMEM;
2068 }
2069
2070 /**
2071  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
2072  * @adapter: board private structure to initialize
2073  *
2074  * This function frees the memory allocated to the q_vectors.  In addition if
2075  * NAPI is enabled it will delete any references to the NAPI struct prior
2076  * to freeing the q_vector.
2077  **/
2078 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
2079 {
2080         int q_idx, num_q_vectors;
2081         int napi_vectors;
2082
2083         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2084         napi_vectors = adapter->num_rx_queues;
2085
2086         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
2087                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
2088
2089                 adapter->q_vector[q_idx] = NULL;
2090                 if (q_idx < napi_vectors)
2091                         netif_napi_del(&q_vector->napi);
2092                 kfree(q_vector);
2093         }
2094 }
2095
2096 /**
2097  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2098  * @adapter: board private structure
2099  *
2100  **/
2101 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2102 {
2103         pci_disable_msix(adapter->pdev);
2104         kfree(adapter->msix_entries);
2105         adapter->msix_entries = NULL;
2106 }
2107
2108 /**
2109  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2110  * @adapter: board private structure to initialize
2111  *
2112  **/
2113 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2114 {
2115         int err;
2116
2117         /* Number of supported queues */
2118         ixgbevf_set_num_queues(adapter);
2119
2120         err = ixgbevf_set_interrupt_capability(adapter);
2121         if (err) {
2122                 hw_dbg(&adapter->hw,
2123                        "Unable to setup interrupt capabilities\n");
2124                 goto err_set_interrupt;
2125         }
2126
2127         err = ixgbevf_alloc_q_vectors(adapter);
2128         if (err) {
2129                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2130                        "vectors\n");
2131                 goto err_alloc_q_vectors;
2132         }
2133
2134         err = ixgbevf_alloc_queues(adapter);
2135         if (err) {
2136                 printk(KERN_ERR "Unable to allocate memory for queues\n");
2137                 goto err_alloc_queues;
2138         }
2139
2140         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2141                "Tx Queue count = %u\n",
2142                (adapter->num_rx_queues > 1) ? "Enabled" :
2143                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2144
2145         set_bit(__IXGBEVF_DOWN, &adapter->state);
2146
2147         return 0;
2148 err_alloc_queues:
2149         ixgbevf_free_q_vectors(adapter);
2150 err_alloc_q_vectors:
2151         ixgbevf_reset_interrupt_capability(adapter);
2152 err_set_interrupt:
2153         return err;
2154 }
2155
2156 /**
2157  * ixgbevf_sw_init - Initialize general software structures
2158  * (struct ixgbevf_adapter)
2159  * @adapter: board private structure to initialize
2160  *
2161  * ixgbevf_sw_init initializes the Adapter private data structure.
2162  * Fields are initialized based on PCI device information and
2163  * OS network device settings (MTU size).
2164  **/
2165 static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2166 {
2167         struct ixgbe_hw *hw = &adapter->hw;
2168         struct pci_dev *pdev = adapter->pdev;
2169         int err;
2170
2171         /* PCI config space info */
2172
2173         hw->vendor_id = pdev->vendor;
2174         hw->device_id = pdev->device;
2175         hw->revision_id = pdev->revision;
2176         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2177         hw->subsystem_device_id = pdev->subsystem_device;
2178
2179         hw->mbx.ops.init_params(hw);
2180         hw->mac.max_tx_queues = MAX_TX_QUEUES;
2181         hw->mac.max_rx_queues = MAX_RX_QUEUES;
2182         err = hw->mac.ops.reset_hw(hw);
2183         if (err) {
2184                 dev_info(&pdev->dev,
2185                          "PF still in reset state, assigning new address\n");
2186                 dev_hw_addr_random(adapter->netdev, hw->mac.addr);
2187         } else {
2188                 err = hw->mac.ops.init_hw(hw);
2189                 if (err) {
2190                         printk(KERN_ERR "init_shared_code failed: %d\n", err);
2191                         goto out;
2192                 }
2193         }
2194
2195         /* Enable dynamic interrupt throttling rates */
2196         adapter->eitr_param = 20000;
2197         adapter->itr_setting = 1;
2198
2199         /* set defaults for eitr in MegaBytes */
2200         adapter->eitr_low = 10;
2201         adapter->eitr_high = 20;
2202
2203         /* set default ring sizes */
2204         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2205         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2206
2207         /* enable rx csum by default */
2208         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2209
2210         set_bit(__IXGBEVF_DOWN, &adapter->state);
2211
2212 out:
2213         return err;
2214 }
2215
2216 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
2217         {                                                       \
2218                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
2219                 if (current_counter < last_counter)             \
2220                         counter += 0x100000000LL;               \
2221                 last_counter = current_counter;                 \
2222                 counter &= 0xFFFFFFFF00000000LL;                \
2223                 counter |= current_counter;                     \
2224         }
2225
2226 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2227         {                                                                \
2228                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2229                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2230                 u64 current_counter = (current_counter_msb << 32) |      \
2231                         current_counter_lsb;                             \
2232                 if (current_counter < last_counter)                      \
2233                         counter += 0x1000000000LL;                       \
2234                 last_counter = current_counter;                          \
2235                 counter &= 0xFFFFFFF000000000LL;                         \
2236                 counter |= current_counter;                              \
2237         }
2238 /**
2239  * ixgbevf_update_stats - Update the board statistics counters.
2240  * @adapter: board private structure
2241  **/
2242 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2243 {
2244         struct ixgbe_hw *hw = &adapter->hw;
2245
2246         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2247                                 adapter->stats.vfgprc);
2248         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2249                                 adapter->stats.vfgptc);
2250         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2251                                 adapter->stats.last_vfgorc,
2252                                 adapter->stats.vfgorc);
2253         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2254                                 adapter->stats.last_vfgotc,
2255                                 adapter->stats.vfgotc);
2256         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2257                                 adapter->stats.vfmprc);
2258
2259         /* Fill out the OS statistics structure */
2260         adapter->netdev->stats.multicast = adapter->stats.vfmprc -
2261                 adapter->stats.base_vfmprc;
2262 }
2263
2264 /**
2265  * ixgbevf_watchdog - Timer Call-back
2266  * @data: pointer to adapter cast into an unsigned long
2267  **/
2268 static void ixgbevf_watchdog(unsigned long data)
2269 {
2270         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2271         struct ixgbe_hw *hw = &adapter->hw;
2272         u64 eics = 0;
2273         int i;
2274
2275         /*
2276          * Do the watchdog outside of interrupt context due to the lovely
2277          * delays that some of the newer hardware requires
2278          */
2279
2280         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2281                 goto watchdog_short_circuit;
2282
2283         /* get one bit for every active tx/rx interrupt vector */
2284         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2285                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2286                 if (qv->rxr_count || qv->txr_count)
2287                         eics |= (1 << i);
2288         }
2289
2290         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, (u32)eics);
2291
2292 watchdog_short_circuit:
2293         schedule_work(&adapter->watchdog_task);
2294 }
2295
2296 /**
2297  * ixgbevf_tx_timeout - Respond to a Tx Hang
2298  * @netdev: network interface device structure
2299  **/
2300 static void ixgbevf_tx_timeout(struct net_device *netdev)
2301 {
2302         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2303
2304         /* Do the reset outside of interrupt context */
2305         schedule_work(&adapter->reset_task);
2306 }
2307
2308 static void ixgbevf_reset_task(struct work_struct *work)
2309 {
2310         struct ixgbevf_adapter *adapter;
2311         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2312
2313         /* If we're already down or resetting, just bail */
2314         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2315             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2316                 return;
2317
2318         adapter->tx_timeout_count++;
2319
2320         ixgbevf_reinit_locked(adapter);
2321 }
2322
2323 /**
2324  * ixgbevf_watchdog_task - worker thread to bring link up
2325  * @work: pointer to work_struct containing our data
2326  **/
2327 static void ixgbevf_watchdog_task(struct work_struct *work)
2328 {
2329         struct ixgbevf_adapter *adapter = container_of(work,
2330                                                        struct ixgbevf_adapter,
2331                                                        watchdog_task);
2332         struct net_device *netdev = adapter->netdev;
2333         struct ixgbe_hw *hw = &adapter->hw;
2334         u32 link_speed = adapter->link_speed;
2335         bool link_up = adapter->link_up;
2336
2337         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2338
2339         /*
2340          * Always check the link on the watchdog because we have
2341          * no LSC interrupt
2342          */
2343         if (hw->mac.ops.check_link) {
2344                 if ((hw->mac.ops.check_link(hw, &link_speed,
2345                                             &link_up, false)) != 0) {
2346                         adapter->link_up = link_up;
2347                         adapter->link_speed = link_speed;
2348                         netif_carrier_off(netdev);
2349                         netif_tx_stop_all_queues(netdev);
2350                         schedule_work(&adapter->reset_task);
2351                         goto pf_has_reset;
2352                 }
2353         } else {
2354                 /* always assume link is up, if no check link
2355                  * function */
2356                 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
2357                 link_up = true;
2358         }
2359         adapter->link_up = link_up;
2360         adapter->link_speed = link_speed;
2361
2362         if (link_up) {
2363                 if (!netif_carrier_ok(netdev)) {
2364                         hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n",
2365                                (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2366                                10 : 1);
2367                         netif_carrier_on(netdev);
2368                         netif_tx_wake_all_queues(netdev);
2369                 }
2370         } else {
2371                 adapter->link_up = false;
2372                 adapter->link_speed = 0;
2373                 if (netif_carrier_ok(netdev)) {
2374                         hw_dbg(&adapter->hw, "NIC Link is Down\n");
2375                         netif_carrier_off(netdev);
2376                         netif_tx_stop_all_queues(netdev);
2377                 }
2378         }
2379
2380         ixgbevf_update_stats(adapter);
2381
2382 pf_has_reset:
2383         /* Reset the timer */
2384         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2385                 mod_timer(&adapter->watchdog_timer,
2386                           round_jiffies(jiffies + (2 * HZ)));
2387
2388         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2389 }
2390
2391 /**
2392  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2393  * @adapter: board private structure
2394  * @tx_ring: Tx descriptor ring for a specific queue
2395  *
2396  * Free all transmit software resources
2397  **/
2398 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2399                                struct ixgbevf_ring *tx_ring)
2400 {
2401         struct pci_dev *pdev = adapter->pdev;
2402
2403         ixgbevf_clean_tx_ring(adapter, tx_ring);
2404
2405         vfree(tx_ring->tx_buffer_info);
2406         tx_ring->tx_buffer_info = NULL;
2407
2408         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2409                           tx_ring->dma);
2410
2411         tx_ring->desc = NULL;
2412 }
2413
2414 /**
2415  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2416  * @adapter: board private structure
2417  *
2418  * Free all transmit software resources
2419  **/
2420 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2421 {
2422         int i;
2423
2424         for (i = 0; i < adapter->num_tx_queues; i++)
2425                 if (adapter->tx_ring[i].desc)
2426                         ixgbevf_free_tx_resources(adapter,
2427                                                   &adapter->tx_ring[i]);
2428
2429 }
2430
2431 /**
2432  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2433  * @adapter: board private structure
2434  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2435  *
2436  * Return 0 on success, negative on failure
2437  **/
2438 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2439                                struct ixgbevf_ring *tx_ring)
2440 {
2441         struct pci_dev *pdev = adapter->pdev;
2442         int size;
2443
2444         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2445         tx_ring->tx_buffer_info = vzalloc(size);
2446         if (!tx_ring->tx_buffer_info)
2447                 goto err;
2448
2449         /* round up to nearest 4K */
2450         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2451         tx_ring->size = ALIGN(tx_ring->size, 4096);
2452
2453         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2454                                            &tx_ring->dma, GFP_KERNEL);
2455         if (!tx_ring->desc)
2456                 goto err;
2457
2458         tx_ring->next_to_use = 0;
2459         tx_ring->next_to_clean = 0;
2460         tx_ring->work_limit = tx_ring->count;
2461         return 0;
2462
2463 err:
2464         vfree(tx_ring->tx_buffer_info);
2465         tx_ring->tx_buffer_info = NULL;
2466         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2467                "descriptor ring\n");
2468         return -ENOMEM;
2469 }
2470
2471 /**
2472  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2473  * @adapter: board private structure
2474  *
2475  * If this function returns with an error, then it's possible one or
2476  * more of the rings is populated (while the rest are not).  It is the
2477  * callers duty to clean those orphaned rings.
2478  *
2479  * Return 0 on success, negative on failure
2480  **/
2481 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2482 {
2483         int i, err = 0;
2484
2485         for (i = 0; i < adapter->num_tx_queues; i++) {
2486                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2487                 if (!err)
2488                         continue;
2489                 hw_dbg(&adapter->hw,
2490                        "Allocation for Tx Queue %u failed\n", i);
2491                 break;
2492         }
2493
2494         return err;
2495 }
2496
2497 /**
2498  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2499  * @adapter: board private structure
2500  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2501  *
2502  * Returns 0 on success, negative on failure
2503  **/
2504 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2505                                struct ixgbevf_ring *rx_ring)
2506 {
2507         struct pci_dev *pdev = adapter->pdev;
2508         int size;
2509
2510         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2511         rx_ring->rx_buffer_info = vzalloc(size);
2512         if (!rx_ring->rx_buffer_info) {
2513                 hw_dbg(&adapter->hw,
2514                        "Unable to vmalloc buffer memory for "
2515                        "the receive descriptor ring\n");
2516                 goto alloc_failed;
2517         }
2518
2519         /* Round up to nearest 4K */
2520         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2521         rx_ring->size = ALIGN(rx_ring->size, 4096);
2522
2523         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2524                                            &rx_ring->dma, GFP_KERNEL);
2525
2526         if (!rx_ring->desc) {
2527                 hw_dbg(&adapter->hw,
2528                        "Unable to allocate memory for "
2529                        "the receive descriptor ring\n");
2530                 vfree(rx_ring->rx_buffer_info);
2531                 rx_ring->rx_buffer_info = NULL;
2532                 goto alloc_failed;
2533         }
2534
2535         rx_ring->next_to_clean = 0;
2536         rx_ring->next_to_use = 0;
2537
2538         return 0;
2539 alloc_failed:
2540         return -ENOMEM;
2541 }
2542
2543 /**
2544  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2545  * @adapter: board private structure
2546  *
2547  * If this function returns with an error, then it's possible one or
2548  * more of the rings is populated (while the rest are not).  It is the
2549  * callers duty to clean those orphaned rings.
2550  *
2551  * Return 0 on success, negative on failure
2552  **/
2553 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2554 {
2555         int i, err = 0;
2556
2557         for (i = 0; i < adapter->num_rx_queues; i++) {
2558                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2559                 if (!err)
2560                         continue;
2561                 hw_dbg(&adapter->hw,
2562                        "Allocation for Rx Queue %u failed\n", i);
2563                 break;
2564         }
2565         return err;
2566 }
2567
2568 /**
2569  * ixgbevf_free_rx_resources - Free Rx Resources
2570  * @adapter: board private structure
2571  * @rx_ring: ring to clean the resources from
2572  *
2573  * Free all receive software resources
2574  **/
2575 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2576                                struct ixgbevf_ring *rx_ring)
2577 {
2578         struct pci_dev *pdev = adapter->pdev;
2579
2580         ixgbevf_clean_rx_ring(adapter, rx_ring);
2581
2582         vfree(rx_ring->rx_buffer_info);
2583         rx_ring->rx_buffer_info = NULL;
2584
2585         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2586                           rx_ring->dma);
2587
2588         rx_ring->desc = NULL;
2589 }
2590
2591 /**
2592  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2593  * @adapter: board private structure
2594  *
2595  * Free all receive software resources
2596  **/
2597 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2598 {
2599         int i;
2600
2601         for (i = 0; i < adapter->num_rx_queues; i++)
2602                 if (adapter->rx_ring[i].desc)
2603                         ixgbevf_free_rx_resources(adapter,
2604                                                   &adapter->rx_ring[i]);
2605 }
2606
2607 /**
2608  * ixgbevf_open - Called when a network interface is made active
2609  * @netdev: network interface device structure
2610  *
2611  * Returns 0 on success, negative value on failure
2612  *
2613  * The open entry point is called when a network interface is made
2614  * active by the system (IFF_UP).  At this point all resources needed
2615  * for transmit and receive operations are allocated, the interrupt
2616  * handler is registered with the OS, the watchdog timer is started,
2617  * and the stack is notified that the interface is ready.
2618  **/
2619 static int ixgbevf_open(struct net_device *netdev)
2620 {
2621         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2622         struct ixgbe_hw *hw = &adapter->hw;
2623         int err;
2624
2625         /* disallow open during test */
2626         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2627                 return -EBUSY;
2628
2629         if (hw->adapter_stopped) {
2630                 ixgbevf_reset(adapter);
2631                 /* if adapter is still stopped then PF isn't up and
2632                  * the vf can't start. */
2633                 if (hw->adapter_stopped) {
2634                         err = IXGBE_ERR_MBX;
2635                         printk(KERN_ERR "Unable to start - perhaps the PF"
2636                                " Driver isn't up yet\n");
2637                         goto err_setup_reset;
2638                 }
2639         }
2640
2641         /* allocate transmit descriptors */
2642         err = ixgbevf_setup_all_tx_resources(adapter);
2643         if (err)
2644                 goto err_setup_tx;
2645
2646         /* allocate receive descriptors */
2647         err = ixgbevf_setup_all_rx_resources(adapter);
2648         if (err)
2649                 goto err_setup_rx;
2650
2651         ixgbevf_configure(adapter);
2652
2653         /*
2654          * Map the Tx/Rx rings to the vectors we were allotted.
2655          * if request_irq will be called in this function map_rings
2656          * must be called *before* up_complete
2657          */
2658         ixgbevf_map_rings_to_vectors(adapter);
2659
2660         err = ixgbevf_up_complete(adapter);
2661         if (err)
2662                 goto err_up;
2663
2664         /* clear any pending interrupts, may auto mask */
2665         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2666         err = ixgbevf_request_irq(adapter);
2667         if (err)
2668                 goto err_req_irq;
2669
2670         ixgbevf_irq_enable(adapter, true, true);
2671
2672         return 0;
2673
2674 err_req_irq:
2675         ixgbevf_down(adapter);
2676 err_up:
2677         ixgbevf_free_irq(adapter);
2678 err_setup_rx:
2679         ixgbevf_free_all_rx_resources(adapter);
2680 err_setup_tx:
2681         ixgbevf_free_all_tx_resources(adapter);
2682         ixgbevf_reset(adapter);
2683
2684 err_setup_reset:
2685
2686         return err;
2687 }
2688
2689 /**
2690  * ixgbevf_close - Disables a network interface
2691  * @netdev: network interface device structure
2692  *
2693  * Returns 0, this is not allowed to fail
2694  *
2695  * The close entry point is called when an interface is de-activated
2696  * by the OS.  The hardware is still under the drivers control, but
2697  * needs to be disabled.  A global MAC reset is issued to stop the
2698  * hardware, and all transmit and receive resources are freed.
2699  **/
2700 static int ixgbevf_close(struct net_device *netdev)
2701 {
2702         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2703
2704         ixgbevf_down(adapter);
2705         ixgbevf_free_irq(adapter);
2706
2707         ixgbevf_free_all_tx_resources(adapter);
2708         ixgbevf_free_all_rx_resources(adapter);
2709
2710         return 0;
2711 }
2712
2713 static int ixgbevf_tso(struct ixgbevf_adapter *adapter,
2714                        struct ixgbevf_ring *tx_ring,
2715                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2716 {
2717         struct ixgbe_adv_tx_context_desc *context_desc;
2718         unsigned int i;
2719         int err;
2720         struct ixgbevf_tx_buffer *tx_buffer_info;
2721         u32 vlan_macip_lens = 0, type_tucmd_mlhl;
2722         u32 mss_l4len_idx, l4len;
2723
2724         if (skb_is_gso(skb)) {
2725                 if (skb_header_cloned(skb)) {
2726                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2727                         if (err)
2728                                 return err;
2729                 }
2730                 l4len = tcp_hdrlen(skb);
2731                 *hdr_len += l4len;
2732
2733                 if (skb->protocol == htons(ETH_P_IP)) {
2734                         struct iphdr *iph = ip_hdr(skb);
2735                         iph->tot_len = 0;
2736                         iph->check = 0;
2737                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2738                                                                  iph->daddr, 0,
2739                                                                  IPPROTO_TCP,
2740                                                                  0);
2741                         adapter->hw_tso_ctxt++;
2742                 } else if (skb_is_gso_v6(skb)) {
2743                         ipv6_hdr(skb)->payload_len = 0;
2744                         tcp_hdr(skb)->check =
2745                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2746                                              &ipv6_hdr(skb)->daddr,
2747                                              0, IPPROTO_TCP, 0);
2748                         adapter->hw_tso6_ctxt++;
2749                 }
2750
2751                 i = tx_ring->next_to_use;
2752
2753                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2754                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2755
2756                 /* VLAN MACLEN IPLEN */
2757                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2758                         vlan_macip_lens |=
2759                                 (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2760                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2761                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2762                 *hdr_len += skb_network_offset(skb);
2763                 vlan_macip_lens |=
2764                         (skb_transport_header(skb) - skb_network_header(skb));
2765                 *hdr_len +=
2766                         (skb_transport_header(skb) - skb_network_header(skb));
2767                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2768                 context_desc->seqnum_seed = 0;
2769
2770                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2771                 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
2772                                     IXGBE_ADVTXD_DTYP_CTXT);
2773
2774                 if (skb->protocol == htons(ETH_P_IP))
2775                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2776                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2777                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2778
2779                 /* MSS L4LEN IDX */
2780                 mss_l4len_idx =
2781                         (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2782                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2783                 /* use index 1 for TSO */
2784                 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2785                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2786
2787                 tx_buffer_info->time_stamp = jiffies;
2788                 tx_buffer_info->next_to_watch = i;
2789
2790                 i++;
2791                 if (i == tx_ring->count)
2792                         i = 0;
2793                 tx_ring->next_to_use = i;
2794
2795                 return true;
2796         }
2797
2798         return false;
2799 }
2800
2801 static bool ixgbevf_tx_csum(struct ixgbevf_adapter *adapter,
2802                             struct ixgbevf_ring *tx_ring,
2803                             struct sk_buff *skb, u32 tx_flags)
2804 {
2805         struct ixgbe_adv_tx_context_desc *context_desc;
2806         unsigned int i;
2807         struct ixgbevf_tx_buffer *tx_buffer_info;
2808         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2809
2810         if (skb->ip_summed == CHECKSUM_PARTIAL ||
2811             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
2812                 i = tx_ring->next_to_use;
2813                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2814                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2815
2816                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2817                         vlan_macip_lens |= (tx_flags &
2818                                             IXGBE_TX_FLAGS_VLAN_MASK);
2819                 vlan_macip_lens |= (skb_network_offset(skb) <<
2820                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2821                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2822                         vlan_macip_lens |= (skb_transport_header(skb) -
2823                                             skb_network_header(skb));
2824
2825                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2826                 context_desc->seqnum_seed = 0;
2827
2828                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2829                                     IXGBE_ADVTXD_DTYP_CTXT);
2830
2831                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2832                         switch (skb->protocol) {
2833                         case __constant_htons(ETH_P_IP):
2834                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2835                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2836                                         type_tucmd_mlhl |=
2837                                             IXGBE_ADVTXD_TUCMD_L4T_TCP;
2838                                 break;
2839                         case __constant_htons(ETH_P_IPV6):
2840                                 /* XXX what about other V6 headers?? */
2841                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2842                                         type_tucmd_mlhl |=
2843                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
2844                                 break;
2845                         default:
2846                                 if (unlikely(net_ratelimit())) {
2847                                         printk(KERN_WARNING
2848                                                "partial checksum but "
2849                                                "proto=%x!\n",
2850                                                skb->protocol);
2851                                 }
2852                                 break;
2853                         }
2854                 }
2855
2856                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2857                 /* use index zero for tx checksum offload */
2858                 context_desc->mss_l4len_idx = 0;
2859
2860                 tx_buffer_info->time_stamp = jiffies;
2861                 tx_buffer_info->next_to_watch = i;
2862
2863                 adapter->hw_csum_tx_good++;
2864                 i++;
2865                 if (i == tx_ring->count)
2866                         i = 0;
2867                 tx_ring->next_to_use = i;
2868
2869                 return true;
2870         }
2871
2872         return false;
2873 }
2874
2875 static int ixgbevf_tx_map(struct ixgbevf_adapter *adapter,
2876                           struct ixgbevf_ring *tx_ring,
2877                           struct sk_buff *skb, u32 tx_flags,
2878                           unsigned int first)
2879 {
2880         struct pci_dev *pdev = adapter->pdev;
2881         struct ixgbevf_tx_buffer *tx_buffer_info;
2882         unsigned int len;
2883         unsigned int total = skb->len;
2884         unsigned int offset = 0, size;
2885         int count = 0;
2886         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2887         unsigned int f;
2888         int i;
2889
2890         i = tx_ring->next_to_use;
2891
2892         len = min(skb_headlen(skb), total);
2893         while (len) {
2894                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2895                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2896
2897                 tx_buffer_info->length = size;
2898                 tx_buffer_info->mapped_as_page = false;
2899                 tx_buffer_info->dma = dma_map_single(&adapter->pdev->dev,
2900                                                      skb->data + offset,
2901                                                      size, DMA_TO_DEVICE);
2902                 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
2903                         goto dma_error;
2904                 tx_buffer_info->time_stamp = jiffies;
2905                 tx_buffer_info->next_to_watch = i;
2906
2907                 len -= size;
2908                 total -= size;
2909                 offset += size;
2910                 count++;
2911                 i++;
2912                 if (i == tx_ring->count)
2913                         i = 0;
2914         }
2915
2916         for (f = 0; f < nr_frags; f++) {
2917                 struct skb_frag_struct *frag;
2918
2919                 frag = &skb_shinfo(skb)->frags[f];
2920                 len = min((unsigned int)frag->size, total);
2921                 offset = frag->page_offset;
2922
2923                 while (len) {
2924                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2925                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2926
2927                         tx_buffer_info->length = size;
2928                         tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev,
2929                                                            frag->page,
2930                                                            offset,
2931                                                            size,
2932                                                            DMA_TO_DEVICE);
2933                         tx_buffer_info->mapped_as_page = true;
2934                         if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
2935                                 goto dma_error;
2936                         tx_buffer_info->time_stamp = jiffies;
2937                         tx_buffer_info->next_to_watch = i;
2938
2939                         len -= size;
2940                         total -= size;
2941                         offset += size;
2942                         count++;
2943                         i++;
2944                         if (i == tx_ring->count)
2945                                 i = 0;
2946                 }
2947                 if (total == 0)
2948                         break;
2949         }
2950
2951         if (i == 0)
2952                 i = tx_ring->count - 1;
2953         else
2954                 i = i - 1;
2955         tx_ring->tx_buffer_info[i].skb = skb;
2956         tx_ring->tx_buffer_info[first].next_to_watch = i;
2957
2958         return count;
2959
2960 dma_error:
2961         dev_err(&pdev->dev, "TX DMA map failed\n");
2962
2963         /* clear timestamp and dma mappings for failed tx_buffer_info map */
2964         tx_buffer_info->dma = 0;
2965         tx_buffer_info->time_stamp = 0;
2966         tx_buffer_info->next_to_watch = 0;
2967         count--;
2968
2969         /* clear timestamp and dma mappings for remaining portion of packet */
2970         while (count >= 0) {
2971                 count--;
2972                 i--;
2973                 if (i < 0)
2974                         i += tx_ring->count;
2975                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2976                 ixgbevf_unmap_and_free_tx_resource(adapter, tx_buffer_info);
2977         }
2978
2979         return count;
2980 }
2981
2982 static void ixgbevf_tx_queue(struct ixgbevf_adapter *adapter,
2983                              struct ixgbevf_ring *tx_ring, int tx_flags,
2984                              int count, u32 paylen, u8 hdr_len)
2985 {
2986         union ixgbe_adv_tx_desc *tx_desc = NULL;
2987         struct ixgbevf_tx_buffer *tx_buffer_info;
2988         u32 olinfo_status = 0, cmd_type_len = 0;
2989         unsigned int i;
2990
2991         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2992
2993         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2994
2995         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2996
2997         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2998                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2999
3000         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3001                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3002
3003                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3004                         IXGBE_ADVTXD_POPTS_SHIFT;
3005
3006                 /* use index 1 context for tso */
3007                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
3008                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3009                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3010                                 IXGBE_ADVTXD_POPTS_SHIFT;
3011
3012         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3013                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3014                         IXGBE_ADVTXD_POPTS_SHIFT;
3015
3016         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3017
3018         i = tx_ring->next_to_use;
3019         while (count--) {
3020                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3021                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3022                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3023                 tx_desc->read.cmd_type_len =
3024                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3025                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3026                 i++;
3027                 if (i == tx_ring->count)
3028                         i = 0;
3029         }
3030
3031         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3032
3033         /*
3034          * Force memory writes to complete before letting h/w
3035          * know there are new descriptors to fetch.  (Only
3036          * applicable for weak-ordered memory model archs,
3037          * such as IA-64).
3038          */
3039         wmb();
3040
3041         tx_ring->next_to_use = i;
3042         writel(i, adapter->hw.hw_addr + tx_ring->tail);
3043 }
3044
3045 static int __ixgbevf_maybe_stop_tx(struct net_device *netdev,
3046                                    struct ixgbevf_ring *tx_ring, int size)
3047 {
3048         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3049
3050         netif_stop_subqueue(netdev, tx_ring->queue_index);
3051         /* Herbert's original patch had:
3052          *  smp_mb__after_netif_stop_queue();
3053          * but since that doesn't exist yet, just open code it. */
3054         smp_mb();
3055
3056         /* We need to check again in a case another CPU has just
3057          * made room available. */
3058         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3059                 return -EBUSY;
3060
3061         /* A reprieve! - use start_queue because it doesn't call schedule */
3062         netif_start_subqueue(netdev, tx_ring->queue_index);
3063         ++adapter->restart_queue;
3064         return 0;
3065 }
3066
3067 static int ixgbevf_maybe_stop_tx(struct net_device *netdev,
3068                                  struct ixgbevf_ring *tx_ring, int size)
3069 {
3070         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3071                 return 0;
3072         return __ixgbevf_maybe_stop_tx(netdev, tx_ring, size);
3073 }
3074
3075 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3076 {
3077         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3078         struct ixgbevf_ring *tx_ring;
3079         unsigned int first;
3080         unsigned int tx_flags = 0;
3081         u8 hdr_len = 0;
3082         int r_idx = 0, tso;
3083         int count = 0;
3084
3085         unsigned int f;
3086
3087         tx_ring = &adapter->tx_ring[r_idx];
3088
3089         if (vlan_tx_tag_present(skb)) {
3090                 tx_flags |= vlan_tx_tag_get(skb);
3091                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3092                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3093         }
3094
3095         /* four things can cause us to need a context descriptor */
3096         if (skb_is_gso(skb) ||
3097             (skb->ip_summed == CHECKSUM_PARTIAL) ||
3098             (tx_flags & IXGBE_TX_FLAGS_VLAN))
3099                 count++;
3100
3101         count += TXD_USE_COUNT(skb_headlen(skb));
3102         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3103                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3104
3105         if (ixgbevf_maybe_stop_tx(netdev, tx_ring, count)) {
3106                 adapter->tx_busy++;
3107                 return NETDEV_TX_BUSY;
3108         }
3109
3110         first = tx_ring->next_to_use;
3111
3112         if (skb->protocol == htons(ETH_P_IP))
3113                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3114         tso = ixgbevf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3115         if (tso < 0) {
3116                 dev_kfree_skb_any(skb);
3117                 return NETDEV_TX_OK;
3118         }
3119
3120         if (tso)
3121                 tx_flags |= IXGBE_TX_FLAGS_TSO;
3122         else if (ixgbevf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3123                  (skb->ip_summed == CHECKSUM_PARTIAL))
3124                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3125
3126         ixgbevf_tx_queue(adapter, tx_ring, tx_flags,
3127                          ixgbevf_tx_map(adapter, tx_ring, skb, tx_flags, first),
3128                          skb->len, hdr_len);
3129
3130         ixgbevf_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3131
3132         return NETDEV_TX_OK;
3133 }
3134
3135 /**
3136  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3137  * @netdev: network interface device structure
3138  * @p: pointer to an address structure
3139  *
3140  * Returns 0 on success, negative on failure
3141  **/
3142 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3143 {
3144         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3145         struct ixgbe_hw *hw = &adapter->hw;
3146         struct sockaddr *addr = p;
3147
3148         if (!is_valid_ether_addr(addr->sa_data))
3149                 return -EADDRNOTAVAIL;
3150
3151         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3152         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3153
3154         if (hw->mac.ops.set_rar)
3155                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3156
3157         return 0;
3158 }
3159
3160 /**
3161  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3162  * @netdev: network interface device structure
3163  * @new_mtu: new value for maximum frame size
3164  *
3165  * Returns 0 on success, negative on failure
3166  **/
3167 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3168 {
3169         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3170         struct ixgbe_hw *hw = &adapter->hw;
3171         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3172         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3173         u32 msg[2];
3174
3175         if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3176                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3177
3178         /* MTU < 68 is an error and causes problems on some kernels */
3179         if ((new_mtu < 68) || (max_frame > max_possible_frame))
3180                 return -EINVAL;
3181
3182         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3183                netdev->mtu, new_mtu);
3184         /* must set new MTU before calling down or up */
3185         netdev->mtu = new_mtu;
3186
3187         msg[0] = IXGBE_VF_SET_LPE;
3188         msg[1] = max_frame;
3189         hw->mbx.ops.write_posted(hw, msg, 2);
3190
3191         if (netif_running(netdev))
3192                 ixgbevf_reinit_locked(adapter);
3193
3194         return 0;
3195 }
3196
3197 static void ixgbevf_shutdown(struct pci_dev *pdev)
3198 {
3199         struct net_device *netdev = pci_get_drvdata(pdev);
3200         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3201
3202         netif_device_detach(netdev);
3203
3204         if (netif_running(netdev)) {
3205                 ixgbevf_down(adapter);
3206                 ixgbevf_free_irq(adapter);
3207                 ixgbevf_free_all_tx_resources(adapter);
3208                 ixgbevf_free_all_rx_resources(adapter);
3209         }
3210
3211 #ifdef CONFIG_PM
3212         pci_save_state(pdev);
3213 #endif
3214
3215         pci_disable_device(pdev);
3216 }
3217
3218 static const struct net_device_ops ixgbe_netdev_ops = {
3219         .ndo_open               = ixgbevf_open,
3220         .ndo_stop               = ixgbevf_close,
3221         .ndo_start_xmit         = ixgbevf_xmit_frame,
3222         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3223         .ndo_set_multicast_list = ixgbevf_set_rx_mode,
3224         .ndo_validate_addr      = eth_validate_addr,
3225         .ndo_set_mac_address    = ixgbevf_set_mac,
3226         .ndo_change_mtu         = ixgbevf_change_mtu,
3227         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3228         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3229         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3230 };
3231
3232 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3233 {
3234         dev->netdev_ops = &ixgbe_netdev_ops;
3235         ixgbevf_set_ethtool_ops(dev);
3236         dev->watchdog_timeo = 5 * HZ;
3237 }
3238
3239 /**
3240  * ixgbevf_probe - Device Initialization Routine
3241  * @pdev: PCI device information struct
3242  * @ent: entry in ixgbevf_pci_tbl
3243  *
3244  * Returns 0 on success, negative on failure
3245  *
3246  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3247  * The OS initialization, configuring of the adapter private structure,
3248  * and a hardware reset occur.
3249  **/
3250 static int __devinit ixgbevf_probe(struct pci_dev *pdev,
3251                                    const struct pci_device_id *ent)
3252 {
3253         struct net_device *netdev;
3254         struct ixgbevf_adapter *adapter = NULL;
3255         struct ixgbe_hw *hw = NULL;
3256         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3257         static int cards_found;
3258         int err, pci_using_dac;
3259
3260         err = pci_enable_device(pdev);
3261         if (err)
3262                 return err;
3263
3264         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3265             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3266                 pci_using_dac = 1;
3267         } else {
3268                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3269                 if (err) {
3270                         err = dma_set_coherent_mask(&pdev->dev,
3271                                                     DMA_BIT_MASK(32));
3272                         if (err) {
3273                                 dev_err(&pdev->dev, "No usable DMA "
3274                                         "configuration, aborting\n");
3275                                 goto err_dma;
3276                         }
3277                 }
3278                 pci_using_dac = 0;
3279         }
3280
3281         err = pci_request_regions(pdev, ixgbevf_driver_name);
3282         if (err) {
3283                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3284                 goto err_pci_reg;
3285         }
3286
3287         pci_set_master(pdev);
3288
3289 #ifdef HAVE_TX_MQ
3290         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3291                                    MAX_TX_QUEUES);
3292 #else
3293         netdev = alloc_etherdev(sizeof(struct ixgbevf_adapter));
3294 #endif
3295         if (!netdev) {
3296                 err = -ENOMEM;
3297                 goto err_alloc_etherdev;
3298         }
3299
3300         SET_NETDEV_DEV(netdev, &pdev->dev);
3301
3302         pci_set_drvdata(pdev, netdev);
3303         adapter = netdev_priv(netdev);
3304
3305         adapter->netdev = netdev;
3306         adapter->pdev = pdev;
3307         hw = &adapter->hw;
3308         hw->back = adapter;
3309         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3310
3311         /*
3312          * call save state here in standalone driver because it relies on
3313          * adapter struct to exist, and needs to call netdev_priv
3314          */
3315         pci_save_state(pdev);
3316
3317         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3318                               pci_resource_len(pdev, 0));
3319         if (!hw->hw_addr) {
3320                 err = -EIO;
3321                 goto err_ioremap;
3322         }
3323
3324         ixgbevf_assign_netdev_ops(netdev);
3325
3326         adapter->bd_number = cards_found;
3327
3328         /* Setup hw api */
3329         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3330         hw->mac.type  = ii->mac;
3331
3332         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3333                sizeof(struct ixgbe_mbx_operations));
3334
3335         adapter->flags &= ~IXGBE_FLAG_RX_PS_CAPABLE;
3336         adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
3337         adapter->flags |= IXGBE_FLAG_RX_1BUF_CAPABLE;
3338
3339         /* setup the private structure */
3340         err = ixgbevf_sw_init(adapter);
3341
3342         netdev->features = NETIF_F_SG |
3343                            NETIF_F_IP_CSUM |
3344                            NETIF_F_HW_VLAN_TX |
3345                            NETIF_F_HW_VLAN_RX |
3346                            NETIF_F_HW_VLAN_FILTER;
3347
3348         netdev->features |= NETIF_F_IPV6_CSUM;
3349         netdev->features |= NETIF_F_TSO;
3350         netdev->features |= NETIF_F_TSO6;
3351         netdev->features |= NETIF_F_GRO;
3352         netdev->vlan_features |= NETIF_F_TSO;
3353         netdev->vlan_features |= NETIF_F_TSO6;
3354         netdev->vlan_features |= NETIF_F_IP_CSUM;
3355         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3356         netdev->vlan_features |= NETIF_F_SG;
3357
3358         if (pci_using_dac)
3359                 netdev->features |= NETIF_F_HIGHDMA;
3360
3361         /* The HW MAC address was set and/or determined in sw_init */
3362         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
3363         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
3364
3365         if (!is_valid_ether_addr(netdev->dev_addr)) {
3366                 printk(KERN_ERR "invalid MAC address\n");
3367                 err = -EIO;
3368                 goto err_sw_init;
3369         }
3370
3371         init_timer(&adapter->watchdog_timer);
3372         adapter->watchdog_timer.function = ixgbevf_watchdog;
3373         adapter->watchdog_timer.data = (unsigned long)adapter;
3374
3375         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3376         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3377
3378         err = ixgbevf_init_interrupt_scheme(adapter);
3379         if (err)
3380                 goto err_sw_init;
3381
3382         /* pick up the PCI bus settings for reporting later */
3383         if (hw->mac.ops.get_bus_info)
3384                 hw->mac.ops.get_bus_info(hw);
3385
3386         strcpy(netdev->name, "eth%d");
3387
3388         err = register_netdev(netdev);
3389         if (err)
3390                 goto err_register;
3391
3392         adapter->netdev_registered = true;
3393
3394         netif_carrier_off(netdev);
3395
3396         ixgbevf_init_last_counter_stats(adapter);
3397
3398         /* print the MAC address */
3399         hw_dbg(hw, "%2.2x:%2.2x:%2.2x:%2.2x:%2.2x:%2.2x\n",
3400                netdev->dev_addr[0],
3401                netdev->dev_addr[1],
3402                netdev->dev_addr[2],
3403                netdev->dev_addr[3],
3404                netdev->dev_addr[4],
3405                netdev->dev_addr[5]);
3406
3407         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3408
3409         hw_dbg(hw, "LRO is disabled\n");
3410
3411         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3412         cards_found++;
3413         return 0;
3414
3415 err_register:
3416 err_sw_init:
3417         ixgbevf_reset_interrupt_capability(adapter);
3418         iounmap(hw->hw_addr);
3419 err_ioremap:
3420         free_netdev(netdev);
3421 err_alloc_etherdev:
3422         pci_release_regions(pdev);
3423 err_pci_reg:
3424 err_dma:
3425         pci_disable_device(pdev);
3426         return err;
3427 }
3428
3429 /**
3430  * ixgbevf_remove - Device Removal Routine
3431  * @pdev: PCI device information struct
3432  *
3433  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3434  * that it should release a PCI device.  The could be caused by a
3435  * Hot-Plug event, or because the driver is going to be removed from
3436  * memory.
3437  **/
3438 static void __devexit ixgbevf_remove(struct pci_dev *pdev)
3439 {
3440         struct net_device *netdev = pci_get_drvdata(pdev);
3441         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3442
3443         set_bit(__IXGBEVF_DOWN, &adapter->state);
3444
3445         del_timer_sync(&adapter->watchdog_timer);
3446
3447         cancel_work_sync(&adapter->reset_task);
3448         cancel_work_sync(&adapter->watchdog_task);
3449
3450         if (adapter->netdev_registered) {
3451                 unregister_netdev(netdev);
3452                 adapter->netdev_registered = false;
3453         }
3454
3455         ixgbevf_reset_interrupt_capability(adapter);
3456
3457         iounmap(adapter->hw.hw_addr);
3458         pci_release_regions(pdev);
3459
3460         hw_dbg(&adapter->hw, "Remove complete\n");
3461
3462         kfree(adapter->tx_ring);
3463         kfree(adapter->rx_ring);
3464
3465         free_netdev(netdev);
3466
3467         pci_disable_device(pdev);
3468 }
3469
3470 static struct pci_driver ixgbevf_driver = {
3471         .name     = ixgbevf_driver_name,
3472         .id_table = ixgbevf_pci_tbl,
3473         .probe    = ixgbevf_probe,
3474         .remove   = __devexit_p(ixgbevf_remove),
3475         .shutdown = ixgbevf_shutdown,
3476 };
3477
3478 /**
3479  * ixgbevf_init_module - Driver Registration Routine
3480  *
3481  * ixgbevf_init_module is the first routine called when the driver is
3482  * loaded. All it does is register with the PCI subsystem.
3483  **/
3484 static int __init ixgbevf_init_module(void)
3485 {
3486         int ret;
3487         printk(KERN_INFO "ixgbevf: %s - version %s\n", ixgbevf_driver_string,
3488                ixgbevf_driver_version);
3489
3490         printk(KERN_INFO "%s\n", ixgbevf_copyright);
3491
3492         ret = pci_register_driver(&ixgbevf_driver);
3493         return ret;
3494 }
3495
3496 module_init(ixgbevf_init_module);
3497
3498 /**
3499  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3500  *
3501  * ixgbevf_exit_module is called just before the driver is removed
3502  * from memory.
3503  **/
3504 static void __exit ixgbevf_exit_module(void)
3505 {
3506         pci_unregister_driver(&ixgbevf_driver);
3507 }
3508
3509 #ifdef DEBUG
3510 /**
3511  * ixgbevf_get_hw_dev_name - return device name string
3512  * used by hardware layer to print debugging information
3513  **/
3514 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3515 {
3516         struct ixgbevf_adapter *adapter = hw->back;
3517         return adapter->netdev->name;
3518 }
3519
3520 #endif
3521 module_exit(ixgbevf_exit_module);
3522
3523 /* ixgbevf_main.c */