Pileus Git - ~andy/linux/blob - drivers/net/ethernet/intel/ixgbevf/ixgbevf_main.c

   1 /*******************************************************************************
   2
   3   Intel 82599 Virtual Function driver
   4   Copyright(c) 1999 - 2012 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28
  29 /******************************************************************************
  30  Copyright (c)2006 - 2007 Myricom, Inc. for some LRO specific code
  31 ******************************************************************************/
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #include <linux/types.h>
  36 #include <linux/bitops.h>
  37 #include <linux/module.h>
  38 #include <linux/pci.h>
  39 #include <linux/netdevice.h>
  40 #include <linux/vmalloc.h>
  41 #include <linux/string.h>
  42 #include <linux/in.h>
  43 #include <linux/ip.h>
  44 #include <linux/tcp.h>
  45 #include <linux/sctp.h>
  46 #include <linux/ipv6.h>
  47 #include <linux/slab.h>
  48 #include <net/checksum.h>
  49 #include <net/ip6_checksum.h>
  50 #include <linux/ethtool.h>
  51 #include <linux/if.h>
  52 #include <linux/if_vlan.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "ixgbevf.h"
  56
  57 const char ixgbevf_driver_name[] = "ixgbevf";
  58 static const char ixgbevf_driver_string[] =
  59         "Intel(R) 10 Gigabit PCI Express Virtual Function Network Driver";
  60
  61 #define DRV_VERSION "2.11.3-k"
  62 const char ixgbevf_driver_version[] = DRV_VERSION;
  63 static char ixgbevf_copyright[] =
  64         "Copyright (c) 2009 - 2012 Intel Corporation.";
  65
  66 static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
  67         [board_82599_vf] = &ixgbevf_82599_vf_info,
  68         [board_X540_vf]  = &ixgbevf_X540_vf_info,
  69 };
  70
  71 /* ixgbevf_pci_tbl - PCI Device ID Table
  72  *
  73  * Wildcard entries (PCI_ANY_ID) should come last
  74  * Last entry must be all 0s
  75  *
  76  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  77  *   Class, Class Mask, private data (not used) }
  78  */
  79 static DEFINE_PCI_DEVICE_TABLE(ixgbevf_pci_tbl) = {
  80         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_VF), board_82599_vf },
  81         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540_VF), board_X540_vf },
  82         /* required last entry */
  83         {0, }
  84 };
  85 MODULE_DEVICE_TABLE(pci, ixgbevf_pci_tbl);
  86
  87 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  88 MODULE_DESCRIPTION("Intel(R) 82599 Virtual Function Driver");
  89 MODULE_LICENSE("GPL");
  90 MODULE_VERSION(DRV_VERSION);
  91
  92 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  93 static int debug = -1;
  94 module_param(debug, int, 0);
  95 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  96
  97 /* forward decls */
  98 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector);
  99 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter);
 100
 101 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
 102                                            struct ixgbevf_ring *rx_ring,
 103                                            u32 val)
 104 {
 105         /*
 106          * Force memory writes to complete before letting h/w
 107          * know there are new descriptors to fetch.  (Only
 108          * applicable for weak-ordered memory model archs,
 109          * such as IA-64).
 110          */
 111         wmb();
 112         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 113 }
 114
 115 /**
 116  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 117  * @adapter: pointer to adapter struct
 118  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 119  * @queue: queue to map the corresponding interrupt to
 120  * @msix_vector: the vector to map to the corresponding queue
 121  */
 122 static void ixgbevf_set_ivar(struct ixgbevf_adapter *adapter, s8 direction,
 123                              u8 queue, u8 msix_vector)
 124 {
 125         u32 ivar, index;
 126         struct ixgbe_hw *hw = &adapter->hw;
 127         if (direction == -1) {
 128                 /* other causes */
 129                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 130                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR_MISC);
 131                 ivar &= ~0xFF;
 132                 ivar |= msix_vector;
 133                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR_MISC, ivar);
 134         } else {
 135                 /* tx or rx causes */
 136                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 137                 index = ((16 * (queue & 1)) + (8 * direction));
 138                 ivar = IXGBE_READ_REG(hw, IXGBE_VTIVAR(queue >> 1));
 139                 ivar &= ~(0xFF << index);
 140                 ivar |= (msix_vector << index);
 141                 IXGBE_WRITE_REG(hw, IXGBE_VTIVAR(queue >> 1), ivar);
 142         }
 143 }
 144
 145 static void ixgbevf_unmap_and_free_tx_resource(struct ixgbevf_ring *tx_ring,
 146                                                struct ixgbevf_tx_buffer
 147                                                *tx_buffer_info)
 148 {
 149         if (tx_buffer_info->dma) {
 150                 if (tx_buffer_info->mapped_as_page)
 151                         dma_unmap_page(tx_ring->dev,
 152                                        tx_buffer_info->dma,
 153                                        tx_buffer_info->length,
 154                                        DMA_TO_DEVICE);
 155                 else
 156                         dma_unmap_single(tx_ring->dev,
 157                                          tx_buffer_info->dma,
 158                                          tx_buffer_info->length,
 159                                          DMA_TO_DEVICE);
 160                 tx_buffer_info->dma = 0;
 161         }
 162         if (tx_buffer_info->skb) {
 163                 dev_kfree_skb_any(tx_buffer_info->skb);
 164                 tx_buffer_info->skb = NULL;
 165         }
 166         tx_buffer_info->time_stamp = 0;
 167         /* tx_buffer_info must be completely set up in the transmit path */
 168 }
 169
 170 #define IXGBE_MAX_TXD_PWR       14
 171 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 172
 173 /* Tx Descriptors needed, worst case */
 174 #define TXD_USE_COUNT(S) DIV_ROUND_UP((S), IXGBE_MAX_DATA_PER_TXD)
 175 #define DESC_NEEDED (MAX_SKB_FRAGS + 4)
 176
 177 static void ixgbevf_tx_timeout(struct net_device *netdev);
 178
 179 /**
 180  * ixgbevf_clean_tx_irq - Reclaim resources after transmit completes
 181  * @q_vector: board private structure
 182  * @tx_ring: tx ring to clean
 183  **/
 184 static bool ixgbevf_clean_tx_irq(struct ixgbevf_q_vector *q_vector,
 185                                  struct ixgbevf_ring *tx_ring)
 186 {
 187         struct ixgbevf_adapter *adapter = q_vector->adapter;
 188         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 189         struct ixgbevf_tx_buffer *tx_buffer_info;
 190         unsigned int i, count = 0;
 191         unsigned int total_bytes = 0, total_packets = 0;
 192
 193         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
 194                 return true;
 195
 196         i = tx_ring->next_to_clean;
 197         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 198         eop_desc = tx_buffer_info->next_to_watch;
 199
 200         do {
 201                 bool cleaned = false;
 202
 203                 /* if next_to_watch is not set then there is no work pending */
 204                 if (!eop_desc)
 205                         break;
 206
 207                 /* prevent any other reads prior to eop_desc */
 208                 read_barrier_depends();
 209
 210                 /* if DD is not set pending work has not been completed */
 211                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 212                         break;
 213
 214                 /* clear next_to_watch to prevent false hangs */
 215                 tx_buffer_info->next_to_watch = NULL;
 216
 217                 for ( ; !cleaned; count++) {
 218                         struct sk_buff *skb;
 219                         tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
 220                         cleaned = (tx_desc == eop_desc);
 221                         skb = tx_buffer_info->skb;
 222
 223                         if (cleaned && skb) {
 224                                 unsigned int segs, bytecount;
 225
 226                                 /* gso_segs is currently only valid for tcp */
 227                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 228                                 /* multiply data chunks by size of headers */
 229                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 230                                             skb->len;
 231                                 total_packets += segs;
 232                                 total_bytes += bytecount;
 233                         }
 234
 235                         ixgbevf_unmap_and_free_tx_resource(tx_ring,
 236                                                            tx_buffer_info);
 237
 238                         tx_desc->wb.status = 0;
 239
 240                         i++;
 241                         if (i == tx_ring->count)
 242                                 i = 0;
 243
 244                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 245                 }
 246
 247                 eop_desc = tx_buffer_info->next_to_watch;
 248         } while (count < tx_ring->count);
 249
 250         tx_ring->next_to_clean = i;
 251
 252 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 253         if (unlikely(count && netif_carrier_ok(tx_ring->netdev) &&
 254                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 255                 /* Make sure that anybody stopping the queue after this
 256                  * sees the new next_to_clean.
 257                  */
 258                 smp_mb();
 259                 if (__netif_subqueue_stopped(tx_ring->netdev,
 260                                              tx_ring->queue_index) &&
 261                     !test_bit(__IXGBEVF_DOWN, &adapter->state)) {
 262                         netif_wake_subqueue(tx_ring->netdev,
 263                                             tx_ring->queue_index);
 264                         ++adapter->restart_queue;
 265                 }
 266         }
 267
 268         u64_stats_update_begin(&tx_ring->syncp);
 269         tx_ring->total_bytes += total_bytes;
 270         tx_ring->total_packets += total_packets;
 271         u64_stats_update_end(&tx_ring->syncp);
 272         q_vector->tx.total_bytes += total_bytes;
 273         q_vector->tx.total_packets += total_packets;
 274
 275         return count < tx_ring->count;
 276 }
 277
 278 /**
 279  * ixgbevf_receive_skb - Send a completed packet up the stack
 280  * @q_vector: structure containing interrupt and ring information
 281  * @skb: packet to send up
 282  * @status: hardware indication of status of receive
 283  * @rx_desc: rx descriptor
 284  **/
 285 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
 286                                 struct sk_buff *skb, u8 status,
 287                                 union ixgbe_adv_rx_desc *rx_desc)
 288 {
 289         struct ixgbevf_adapter *adapter = q_vector->adapter;
 290         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 291         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 292
 293         if (is_vlan && test_bit(tag & VLAN_VID_MASK, adapter->active_vlans))
 294                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
 295
 296         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
 297                 napi_gro_receive(&q_vector->napi, skb);
 298         else
 299                 netif_rx(skb);
 300 }
 301
 302 /**
 303  * ixgbevf_rx_skb - Helper function to determine proper Rx method
 304  * @q_vector: structure containing interrupt and ring information
 305  * @skb: packet to send up
 306  * @status: hardware indication of status of receive
 307  * @rx_desc: rx descriptor
 308  **/
 309 static void ixgbevf_rx_skb(struct ixgbevf_q_vector *q_vector,
 310                            struct sk_buff *skb, u8 status,
 311                            union ixgbe_adv_rx_desc *rx_desc)
 312 {
 313         ixgbevf_receive_skb(q_vector, skb, status, rx_desc);
 314 }
 315
 316 /**
 317  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 318  * @ring: pointer to Rx descriptor ring structure
 319  * @status_err: hardware indication of status of receive
 320  * @skb: skb currently being received and modified
 321  **/
 322 static inline void ixgbevf_rx_checksum(struct ixgbevf_ring *ring,
 323                                        u32 status_err, struct sk_buff *skb)
 324 {
 325         skb_checksum_none_assert(skb);
 326
 327         /* Rx csum disabled */
 328         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 329                 return;
 330
 331         /* if IP and error */
 332         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 333             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 334                 ring->hw_csum_rx_error++;
 335                 return;
 336         }
 337
 338         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 339                 return;
 340
 341         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 342                 ring->hw_csum_rx_error++;
 343                 return;
 344         }
 345
 346         /* It must be a TCP or UDP packet with a valid checksum */
 347         skb->ip_summed = CHECKSUM_UNNECESSARY;
 348         ring->hw_csum_rx_good++;
 349 }
 350
 351 /**
 352  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 353  * @adapter: address of board private structure
 354  **/
 355 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 356                                      struct ixgbevf_ring *rx_ring,
 357                                      int cleaned_count)
 358 {
 359         struct pci_dev *pdev = adapter->pdev;
 360         union ixgbe_adv_rx_desc *rx_desc;
 361         struct ixgbevf_rx_buffer *bi;
 362         unsigned int i = rx_ring->next_to_use;
 363
 364         bi = &rx_ring->rx_buffer_info[i];
 365
 366         while (cleaned_count--) {
 367                 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 368
 369                 if (!bi->skb) {
 370                         struct sk_buff *skb;
 371
 372                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 373                                                         rx_ring->rx_buf_len);
 374                         if (!skb) {
 375                                 adapter->alloc_rx_buff_failed++;
 376                                 goto no_buffers;
 377                         }
 378                         bi->skb = skb;
 379
 380                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 381                                                  rx_ring->rx_buf_len,
 382                                                  DMA_FROM_DEVICE);
 383                         if (dma_mapping_error(&pdev->dev, bi->dma)) {
 384                                 dev_kfree_skb(skb);
 385                                 bi->skb = NULL;
 386                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 387                                 break;
 388                         }
 389                 }
 390                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 391
 392                 i++;
 393                 if (i == rx_ring->count)
 394                         i = 0;
 395                 bi = &rx_ring->rx_buffer_info[i];
 396         }
 397
 398 no_buffers:
 399         if (rx_ring->next_to_use != i) {
 400                 rx_ring->next_to_use = i;
 401                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 402         }
 403 }
 404
 405 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 406                                              u32 qmask)
 407 {
 408         struct ixgbe_hw *hw = &adapter->hw;
 409
 410         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 411 }
 412
 413 static int ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 414                                 struct ixgbevf_ring *rx_ring,
 415                                 int budget)
 416 {
 417         struct ixgbevf_adapter *adapter = q_vector->adapter;
 418         struct pci_dev *pdev = adapter->pdev;
 419         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 420         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 421         struct sk_buff *skb;
 422         unsigned int i;
 423         u32 len, staterr;
 424         int cleaned_count = 0;
 425         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 426
 427         i = rx_ring->next_to_clean;
 428         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 429         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 430         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 431
 432         while (staterr & IXGBE_RXD_STAT_DD) {
 433                 if (!budget)
 434                         break;
 435                 budget--;
 436
 437                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 438                 len = le16_to_cpu(rx_desc->wb.upper.length);
 439                 skb = rx_buffer_info->skb;
 440                 prefetch(skb->data - NET_IP_ALIGN);
 441                 rx_buffer_info->skb = NULL;
 442
 443                 if (rx_buffer_info->dma) {
 444                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 445                                          rx_ring->rx_buf_len,
 446                                          DMA_FROM_DEVICE);
 447                         rx_buffer_info->dma = 0;
 448                         skb_put(skb, len);
 449                 }
 450
 451                 i++;
 452                 if (i == rx_ring->count)
 453                         i = 0;
 454
 455                 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
 456                 prefetch(next_rxd);
 457                 cleaned_count++;
 458
 459                 next_buffer = &rx_ring->rx_buffer_info[i];
 460
 461                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 462                         skb->next = next_buffer->skb;
 463                         IXGBE_CB(skb->next)->prev = skb;
 464                         adapter->non_eop_descs++;
 465                         goto next_desc;
 466                 }
 467
 468                 /* we should not be chaining buffers, if we did drop the skb */
 469                 if (IXGBE_CB(skb)->prev) {
 470                         do {
 471                                 struct sk_buff *this = skb;
 472                                 skb = IXGBE_CB(skb)->prev;
 473                                 dev_kfree_skb(this);
 474                         } while (skb);
 475                         goto next_desc;
 476                 }
 477
 478                 /* ERR_MASK will only have valid bits if EOP set */
 479                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 480                         dev_kfree_skb_irq(skb);
 481                         goto next_desc;
 482                 }
 483
 484                 ixgbevf_rx_checksum(rx_ring, staterr, skb);
 485
 486                 /* probably a little skewed due to removing CRC */
 487                 total_rx_bytes += skb->len;
 488                 total_rx_packets++;
 489
 490                 /*
 491                  * Work around issue of some types of VM to VM loop back
 492                  * packets not getting split correctly
 493                  */
 494                 if (staterr & IXGBE_RXD_STAT_LB) {
 495                         u32 header_fixup_len = skb_headlen(skb);
 496                         if (header_fixup_len < 14)
 497                                 skb_push(skb, header_fixup_len);
 498                 }
 499                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 500
 501                 /* Workaround hardware that can't do proper VEPA multicast
 502                  * source pruning.
 503                  */
 504                 if ((skb->pkt_type & (PACKET_BROADCAST | PACKET_MULTICAST)) &&
 505                     ether_addr_equal(adapter->netdev->dev_addr,
 506                                      eth_hdr(skb)->h_source)) {
 507                         dev_kfree_skb_irq(skb);
 508                         goto next_desc;
 509                 }
 510
 511                 ixgbevf_rx_skb(q_vector, skb, staterr, rx_desc);
 512
 513 next_desc:
 514                 rx_desc->wb.upper.status_error = 0;
 515
 516                 /* return some buffers to hardware, one at a time is too slow */
 517                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 518                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 519                                                  cleaned_count);
 520                         cleaned_count = 0;
 521                 }
 522
 523                 /* use prefetched values */
 524                 rx_desc = next_rxd;
 525                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 526
 527                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 528         }
 529
 530         rx_ring->next_to_clean = i;
 531         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 532
 533         if (cleaned_count)
 534                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 535
 536         u64_stats_update_begin(&rx_ring->syncp);
 537         rx_ring->total_packets += total_rx_packets;
 538         rx_ring->total_bytes += total_rx_bytes;
 539         u64_stats_update_end(&rx_ring->syncp);
 540         q_vector->rx.total_packets += total_rx_packets;
 541         q_vector->rx.total_bytes += total_rx_bytes;
 542
 543         return total_rx_packets;
 544 }
 545
 546 /**
 547  * ixgbevf_poll - NAPI polling calback
 548  * @napi: napi struct with our devices info in it
 549  * @budget: amount of work driver is allowed to do this pass, in packets
 550  *
 551  * This function will clean more than one or more rings associated with a
 552  * q_vector.
 553  **/
 554 static int ixgbevf_poll(struct napi_struct *napi, int budget)
 555 {
 556         struct ixgbevf_q_vector *q_vector =
 557                 container_of(napi, struct ixgbevf_q_vector, napi);
 558         struct ixgbevf_adapter *adapter = q_vector->adapter;
 559         struct ixgbevf_ring *ring;
 560         int per_ring_budget;
 561         bool clean_complete = true;
 562
 563         ixgbevf_for_each_ring(ring, q_vector->tx)
 564                 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
 565
 566         /* attempt to distribute budget to each queue fairly, but don't allow
 567          * the budget to go below 1 because we'll exit polling */
 568         if (q_vector->rx.count > 1)
 569                 per_ring_budget = max(budget/q_vector->rx.count, 1);
 570         else
 571                 per_ring_budget = budget;
 572
 573         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
 574         ixgbevf_for_each_ring(ring, q_vector->rx)
 575                 clean_complete &= (ixgbevf_clean_rx_irq(q_vector, ring,
 576                                                         per_ring_budget)
 577                                    < per_ring_budget);
 578         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
 579
 580         /* If all work not completed, return budget and keep polling */
 581         if (!clean_complete)
 582                 return budget;
 583         /* all work done, exit the polling mode */
 584         napi_complete(napi);
 585         if (adapter->rx_itr_setting & 1)
 586                 ixgbevf_set_itr(q_vector);
 587         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 588                 ixgbevf_irq_enable_queues(adapter,
 589                                           1 << q_vector->v_idx);
 590
 591         return 0;
 592 }
 593
 594 /**
 595  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 596  * @q_vector: structure containing interrupt and ring information
 597  */
 598 void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
 599 {
 600         struct ixgbevf_adapter *adapter = q_vector->adapter;
 601         struct ixgbe_hw *hw = &adapter->hw;
 602         int v_idx = q_vector->v_idx;
 603         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
 604
 605         /*
 606          * set the WDIS bit to not clear the timer bits and cause an
 607          * immediate assertion of the interrupt
 608          */
 609         itr_reg |= IXGBE_EITR_CNT_WDIS;
 610
 611         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 612 }
 613
 614 /**
 615  * ixgbevf_configure_msix - Configure MSI-X hardware
 616  * @adapter: board private structure
 617  *
 618  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 619  * interrupts.
 620  **/
 621 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 622 {
 623         struct ixgbevf_q_vector *q_vector;
 624         int q_vectors, v_idx;
 625
 626         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 627         adapter->eims_enable_mask = 0;
 628
 629         /*
 630          * Populate the IVAR table and set the ITR values to the
 631          * corresponding register.
 632          */
 633         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 634                 struct ixgbevf_ring *ring;
 635                 q_vector = adapter->q_vector[v_idx];
 636
 637                 ixgbevf_for_each_ring(ring, q_vector->rx)
 638                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
 639
 640                 ixgbevf_for_each_ring(ring, q_vector->tx)
 641                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
 642
 643                 if (q_vector->tx.ring && !q_vector->rx.ring) {
 644                         /* tx only vector */
 645                         if (adapter->tx_itr_setting == 1)
 646                                 q_vector->itr = IXGBE_10K_ITR;
 647                         else
 648                                 q_vector->itr = adapter->tx_itr_setting;
 649                 } else {
 650                         /* rx or rx/tx vector */
 651                         if (adapter->rx_itr_setting == 1)
 652                                 q_vector->itr = IXGBE_20K_ITR;
 653                         else
 654                                 q_vector->itr = adapter->rx_itr_setting;
 655                 }
 656
 657                 /* add q_vector eims value to global eims_enable_mask */
 658                 adapter->eims_enable_mask |= 1 << v_idx;
 659
 660                 ixgbevf_write_eitr(q_vector);
 661         }
 662
 663         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 664         /* setup eims_other and add value to global eims_enable_mask */
 665         adapter->eims_other = 1 << v_idx;
 666         adapter->eims_enable_mask |= adapter->eims_other;
 667 }
 668
 669 enum latency_range {
 670         lowest_latency = 0,
 671         low_latency = 1,
 672         bulk_latency = 2,
 673         latency_invalid = 255
 674 };
 675
 676 /**
 677  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 678  * @q_vector: structure containing interrupt and ring information
 679  * @ring_container: structure containing ring performance data
 680  *
 681  *      Stores a new ITR value based on packets and byte
 682  *      counts during the last interrupt.  The advantage of per interrupt
 683  *      computation is faster updates and more accurate ITR for the current
 684  *      traffic pattern.  Constants in this function were computed
 685  *      based on theoretical maximum wire speed and thresholds were set based
 686  *      on testing data as well as attempting to minimize response time
 687  *      while increasing bulk throughput.
 688  **/
 689 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
 690                                struct ixgbevf_ring_container *ring_container)
 691 {
 692         int bytes = ring_container->total_bytes;
 693         int packets = ring_container->total_packets;
 694         u32 timepassed_us;
 695         u64 bytes_perint;
 696         u8 itr_setting = ring_container->itr;
 697
 698         if (packets == 0)
 699                 return;
 700
 701         /* simple throttlerate management
 702          *    0-20MB/s lowest (100000 ints/s)
 703          *   20-100MB/s low   (20000 ints/s)
 704          *  100-1249MB/s bulk (8000 ints/s)
 705          */
 706         /* what was last interrupt timeslice? */
 707         timepassed_us = q_vector->itr >> 2;
 708         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 709
 710         switch (itr_setting) {
 711         case lowest_latency:
 712                 if (bytes_perint > 10)
 713                         itr_setting = low_latency;
 714                 break;
 715         case low_latency:
 716                 if (bytes_perint > 20)
 717                         itr_setting = bulk_latency;
 718                 else if (bytes_perint <= 10)
 719                         itr_setting = lowest_latency;
 720                 break;
 721         case bulk_latency:
 722                 if (bytes_perint <= 20)
 723                         itr_setting = low_latency;
 724                 break;
 725         }
 726
 727         /* clear work counters since we have the values we need */
 728         ring_container->total_bytes = 0;
 729         ring_container->total_packets = 0;
 730
 731         /* write updated itr to ring container */
 732         ring_container->itr = itr_setting;
 733 }
 734
 735 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
 736 {
 737         u32 new_itr = q_vector->itr;
 738         u8 current_itr;
 739
 740         ixgbevf_update_itr(q_vector, &q_vector->tx);
 741         ixgbevf_update_itr(q_vector, &q_vector->rx);
 742
 743         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 744
 745         switch (current_itr) {
 746         /* counts and packets in update_itr are dependent on these numbers */
 747         case lowest_latency:
 748                 new_itr = IXGBE_100K_ITR;
 749                 break;
 750         case low_latency:
 751                 new_itr = IXGBE_20K_ITR;
 752                 break;
 753         case bulk_latency:
 754         default:
 755                 new_itr = IXGBE_8K_ITR;
 756                 break;
 757         }
 758
 759         if (new_itr != q_vector->itr) {
 760                 /* do an exponential smoothing */
 761                 new_itr = (10 * new_itr * q_vector->itr) /
 762                           ((9 * new_itr) + q_vector->itr);
 763
 764                 /* save the algorithm value here */
 765                 q_vector->itr = new_itr;
 766
 767                 ixgbevf_write_eitr(q_vector);
 768         }
 769 }
 770
 771 static irqreturn_t ixgbevf_msix_other(int irq, void *data)
 772 {
 773         struct ixgbevf_adapter *adapter = data;
 774         struct ixgbe_hw *hw = &adapter->hw;
 775
 776         hw->mac.get_link_status = 1;
 777
 778         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 779                 mod_timer(&adapter->watchdog_timer, jiffies);
 780
 781         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
 782
 783         return IRQ_HANDLED;
 784 }
 785
 786 /**
 787  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
 788  * @irq: unused
 789  * @data: pointer to our q_vector struct for this interrupt vector
 790  **/
 791 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
 792 {
 793         struct ixgbevf_q_vector *q_vector = data;
 794
 795         /* EIAM disabled interrupts (on this vector) for us */
 796         if (q_vector->rx.ring || q_vector->tx.ring)
 797                 napi_schedule(&q_vector->napi);
 798
 799         return IRQ_HANDLED;
 800 }
 801
 802 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
 803                                      int r_idx)
 804 {
 805         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 806
 807         a->rx_ring[r_idx].next = q_vector->rx.ring;
 808         q_vector->rx.ring = &a->rx_ring[r_idx];
 809         q_vector->rx.count++;
 810 }
 811
 812 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
 813                                      int t_idx)
 814 {
 815         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 816
 817         a->tx_ring[t_idx].next = q_vector->tx.ring;
 818         q_vector->tx.ring = &a->tx_ring[t_idx];
 819         q_vector->tx.count++;
 820 }
 821
 822 /**
 823  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
 824  * @adapter: board private structure to initialize
 825  *
 826  * This function maps descriptor rings to the queue-specific vectors
 827  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 828  * one vector per ring/queue, but on a constrained vector budget, we
 829  * group the rings as "efficiently" as possible.  You would add new
 830  * mapping configurations in here.
 831  **/
 832 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
 833 {
 834         int q_vectors;
 835         int v_start = 0;
 836         int rxr_idx = 0, txr_idx = 0;
 837         int rxr_remaining = adapter->num_rx_queues;
 838         int txr_remaining = adapter->num_tx_queues;
 839         int i, j;
 840         int rqpv, tqpv;
 841         int err = 0;
 842
 843         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 844
 845         /*
 846          * The ideal configuration...
 847          * We have enough vectors to map one per queue.
 848          */
 849         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
 850                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 851                         map_vector_to_rxq(adapter, v_start, rxr_idx);
 852
 853                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 854                         map_vector_to_txq(adapter, v_start, txr_idx);
 855                 goto out;
 856         }
 857
 858         /*
 859          * If we don't have enough vectors for a 1-to-1
 860          * mapping, we'll have to group them so there are
 861          * multiple queues per vector.
 862          */
 863         /* Re-adjusting *qpv takes care of the remainder. */
 864         for (i = v_start; i < q_vectors; i++) {
 865                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 866                 for (j = 0; j < rqpv; j++) {
 867                         map_vector_to_rxq(adapter, i, rxr_idx);
 868                         rxr_idx++;
 869                         rxr_remaining--;
 870                 }
 871         }
 872         for (i = v_start; i < q_vectors; i++) {
 873                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 874                 for (j = 0; j < tqpv; j++) {
 875                         map_vector_to_txq(adapter, i, txr_idx);
 876                         txr_idx++;
 877                         txr_remaining--;
 878                 }
 879         }
 880
 881 out:
 882         return err;
 883 }
 884
 885 /**
 886  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
 887  * @adapter: board private structure
 888  *
 889  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
 890  * interrupts from the kernel.
 891  **/
 892 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
 893 {
 894         struct net_device *netdev = adapter->netdev;
 895         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 896         int vector, err;
 897         int ri = 0, ti = 0;
 898
 899         for (vector = 0; vector < q_vectors; vector++) {
 900                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
 901                 struct msix_entry *entry = &adapter->msix_entries[vector];
 902
 903                 if (q_vector->tx.ring && q_vector->rx.ring) {
 904                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 905                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
 906                         ti++;
 907                 } else if (q_vector->rx.ring) {
 908                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 909                                  "%s-%s-%d", netdev->name, "rx", ri++);
 910                 } else if (q_vector->tx.ring) {
 911                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 912                                  "%s-%s-%d", netdev->name, "tx", ti++);
 913                 } else {
 914                         /* skip this unused q_vector */
 915                         continue;
 916                 }
 917                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
 918                                   q_vector->name, q_vector);
 919                 if (err) {
 920                         hw_dbg(&adapter->hw,
 921                                "request_irq failed for MSIX interrupt "
 922                                "Error: %d\n", err);
 923                         goto free_queue_irqs;
 924                 }
 925         }
 926
 927         err = request_irq(adapter->msix_entries[vector].vector,
 928                           &ixgbevf_msix_other, 0, netdev->name, adapter);
 929         if (err) {
 930                 hw_dbg(&adapter->hw,
 931                        "request_irq for msix_other failed: %d\n", err);
 932                 goto free_queue_irqs;
 933         }
 934
 935         return 0;
 936
 937 free_queue_irqs:
 938         while (vector) {
 939                 vector--;
 940                 free_irq(adapter->msix_entries[vector].vector,
 941                          adapter->q_vector[vector]);
 942         }
 943         /* This failure is non-recoverable - it indicates the system is
 944          * out of MSIX vector resources and the VF driver cannot run
 945          * without them.  Set the number of msix vectors to zero
 946          * indicating that not enough can be allocated.  The error
 947          * will be returned to the user indicating device open failed.
 948          * Any further attempts to force the driver to open will also
 949          * fail.  The only way to recover is to unload the driver and
 950          * reload it again.  If the system has recovered some MSIX
 951          * vectors then it may succeed.
 952          */
 953         adapter->num_msix_vectors = 0;
 954         return err;
 955 }
 956
 957 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
 958 {
 959         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 960
 961         for (i = 0; i < q_vectors; i++) {
 962                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
 963                 q_vector->rx.ring = NULL;
 964                 q_vector->tx.ring = NULL;
 965                 q_vector->rx.count = 0;
 966                 q_vector->tx.count = 0;
 967         }
 968 }
 969
 970 /**
 971  * ixgbevf_request_irq - initialize interrupts
 972  * @adapter: board private structure
 973  *
 974  * Attempts to configure interrupts using the best available
 975  * capabilities of the hardware and kernel.
 976  **/
 977 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
 978 {
 979         int err = 0;
 980
 981         err = ixgbevf_request_msix_irqs(adapter);
 982
 983         if (err)
 984                 hw_dbg(&adapter->hw,
 985                        "request_irq failed, Error %d\n", err);
 986
 987         return err;
 988 }
 989
 990 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
 991 {
 992         int i, q_vectors;
 993
 994         q_vectors = adapter->num_msix_vectors;
 995         i = q_vectors - 1;
 996
 997         free_irq(adapter->msix_entries[i].vector, adapter);
 998         i--;
 999
1000         for (; i >= 0; i--) {
1001                 /* free only the irqs that were actually requested */
1002                 if (!adapter->q_vector[i]->rx.ring &&
1003                     !adapter->q_vector[i]->tx.ring)
1004                         continue;
1005
1006                 free_irq(adapter->msix_entries[i].vector,
1007                          adapter->q_vector[i]);
1008         }
1009
1010         ixgbevf_reset_q_vectors(adapter);
1011 }
1012
1013 /**
1014  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
1015  * @adapter: board private structure
1016  **/
1017 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
1018 {
1019         struct ixgbe_hw *hw = &adapter->hw;
1020         int i;
1021
1022         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
1023         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
1024         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
1025
1026         IXGBE_WRITE_FLUSH(hw);
1027
1028         for (i = 0; i < adapter->num_msix_vectors; i++)
1029                 synchronize_irq(adapter->msix_entries[i].vector);
1030 }
1031
1032 /**
1033  * ixgbevf_irq_enable - Enable default interrupt generation settings
1034  * @adapter: board private structure
1035  **/
1036 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1037 {
1038         struct ixgbe_hw *hw = &adapter->hw;
1039
1040         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1041         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1042         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1043 }
1044
1045 /**
1046  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1047  * @adapter: board private structure
1048  *
1049  * Configure the Tx unit of the MAC after a reset.
1050  **/
1051 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1052 {
1053         u64 tdba;
1054         struct ixgbe_hw *hw = &adapter->hw;
1055         u32 i, j, tdlen, txctrl;
1056
1057         /* Setup the HW Tx Head and Tail descriptor pointers */
1058         for (i = 0; i < adapter->num_tx_queues; i++) {
1059                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1060                 j = ring->reg_idx;
1061                 tdba = ring->dma;
1062                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1063                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1064                                 (tdba & DMA_BIT_MASK(32)));
1065                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1066                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1067                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1068                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1069                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1070                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1071                 /* Disable Tx Head Writeback RO bit, since this hoses
1072                  * bookkeeping if things aren't delivered in order.
1073                  */
1074                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1075                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1076                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1077         }
1078 }
1079
1080 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1081
1082 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1083 {
1084         struct ixgbevf_ring *rx_ring;
1085         struct ixgbe_hw *hw = &adapter->hw;
1086         u32 srrctl;
1087
1088         rx_ring = &adapter->rx_ring[index];
1089
1090         srrctl = IXGBE_SRRCTL_DROP_EN;
1091
1092         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1093
1094         srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1095                   IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1096
1097         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1098 }
1099
1100 static void ixgbevf_setup_psrtype(struct ixgbevf_adapter *adapter)
1101 {
1102         struct ixgbe_hw *hw = &adapter->hw;
1103
1104         /* PSRTYPE must be initialized in 82599 */
1105         u32 psrtype = IXGBE_PSRTYPE_TCPHDR | IXGBE_PSRTYPE_UDPHDR |
1106                       IXGBE_PSRTYPE_IPV4HDR | IXGBE_PSRTYPE_IPV6HDR |
1107                       IXGBE_PSRTYPE_L2HDR;
1108
1109         if (adapter->num_rx_queues > 1)
1110                 psrtype |= 1 << 29;
1111
1112         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, psrtype);
1113 }
1114
1115 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1116 {
1117         struct ixgbe_hw *hw = &adapter->hw;
1118         struct net_device *netdev = adapter->netdev;
1119         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1120         int i;
1121         u16 rx_buf_len;
1122
1123         /* notify the PF of our intent to use this size of frame */
1124         ixgbevf_rlpml_set_vf(hw, max_frame);
1125
1126         /* PF will allow an extra 4 bytes past for vlan tagged frames */
1127         max_frame += VLAN_HLEN;
1128
1129         /*
1130          * Allocate buffer sizes that fit well into 32K and
1131          * take into account max frame size of 9.5K
1132          */
1133         if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1134             (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1135                 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1136         else if (max_frame <= IXGBEVF_RXBUFFER_2K)
1137                 rx_buf_len = IXGBEVF_RXBUFFER_2K;
1138         else if (max_frame <= IXGBEVF_RXBUFFER_4K)
1139                 rx_buf_len = IXGBEVF_RXBUFFER_4K;
1140         else if (max_frame <= IXGBEVF_RXBUFFER_8K)
1141                 rx_buf_len = IXGBEVF_RXBUFFER_8K;
1142         else
1143                 rx_buf_len = IXGBEVF_RXBUFFER_10K;
1144
1145         for (i = 0; i < adapter->num_rx_queues; i++)
1146                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1147 }
1148
1149 /**
1150  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1151  * @adapter: board private structure
1152  *
1153  * Configure the Rx unit of the MAC after a reset.
1154  **/
1155 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1156 {
1157         u64 rdba;
1158         struct ixgbe_hw *hw = &adapter->hw;
1159         int i, j;
1160         u32 rdlen;
1161
1162         ixgbevf_setup_psrtype(adapter);
1163
1164         /* set_rx_buffer_len must be called before ring initialization */
1165         ixgbevf_set_rx_buffer_len(adapter);
1166
1167         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1168         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1169          * the Base and Length of the Rx Descriptor Ring */
1170         for (i = 0; i < adapter->num_rx_queues; i++) {
1171                 rdba = adapter->rx_ring[i].dma;
1172                 j = adapter->rx_ring[i].reg_idx;
1173                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1174                                 (rdba & DMA_BIT_MASK(32)));
1175                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1176                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1177                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1178                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1179                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1180                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1181
1182                 ixgbevf_configure_srrctl(adapter, j);
1183         }
1184 }
1185
1186 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev,
1187                                    __be16 proto, u16 vid)
1188 {
1189         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1190         struct ixgbe_hw *hw = &adapter->hw;
1191         int err;
1192
1193         spin_lock_bh(&adapter->mbx_lock);
1194
1195         /* add VID to filter table */
1196         err = hw->mac.ops.set_vfta(hw, vid, 0, true);
1197
1198         spin_unlock_bh(&adapter->mbx_lock);
1199
1200         /* translate error return types so error makes sense */
1201         if (err == IXGBE_ERR_MBX)
1202                 return -EIO;
1203
1204         if (err == IXGBE_ERR_INVALID_ARGUMENT)
1205                 return -EACCES;
1206
1207         set_bit(vid, adapter->active_vlans);
1208
1209         return err;
1210 }
1211
1212 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev,
1213                                     __be16 proto, u16 vid)
1214 {
1215         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1216         struct ixgbe_hw *hw = &adapter->hw;
1217         int err = -EOPNOTSUPP;
1218
1219         spin_lock_bh(&adapter->mbx_lock);
1220
1221         /* remove VID from filter table */
1222         err = hw->mac.ops.set_vfta(hw, vid, 0, false);
1223
1224         spin_unlock_bh(&adapter->mbx_lock);
1225
1226         clear_bit(vid, adapter->active_vlans);
1227
1228         return err;
1229 }
1230
1231 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1232 {
1233         u16 vid;
1234
1235         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1236                 ixgbevf_vlan_rx_add_vid(adapter->netdev,
1237                                         htons(ETH_P_8021Q), vid);
1238 }
1239
1240 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1241 {
1242         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1243         struct ixgbe_hw *hw = &adapter->hw;
1244         int count = 0;
1245
1246         if ((netdev_uc_count(netdev)) > 10) {
1247                 pr_err("Too many unicast filters - No Space\n");
1248                 return -ENOSPC;
1249         }
1250
1251         if (!netdev_uc_empty(netdev)) {
1252                 struct netdev_hw_addr *ha;
1253                 netdev_for_each_uc_addr(ha, netdev) {
1254                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1255                         udelay(200);
1256                 }
1257         } else {
1258                 /*
1259                  * If the list is empty then send message to PF driver to
1260                  * clear all macvlans on this VF.
1261                  */
1262                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1263         }
1264
1265         return count;
1266 }
1267
1268 /**
1269  * ixgbevf_set_rx_mode - Multicast and unicast set
1270  * @netdev: network interface device structure
1271  *
1272  * The set_rx_method entry point is called whenever the multicast address
1273  * list, unicast address list or the network interface flags are updated.
1274  * This routine is responsible for configuring the hardware for proper
1275  * multicast mode and configuring requested unicast filters.
1276  **/
1277 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1278 {
1279         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1280         struct ixgbe_hw *hw = &adapter->hw;
1281
1282         spin_lock_bh(&adapter->mbx_lock);
1283
1284         /* reprogram multicast list */
1285         hw->mac.ops.update_mc_addr_list(hw, netdev);
1286
1287         ixgbevf_write_uc_addr_list(netdev);
1288
1289         spin_unlock_bh(&adapter->mbx_lock);
1290 }
1291
1292 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1293 {
1294         int q_idx;
1295         struct ixgbevf_q_vector *q_vector;
1296         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1297
1298         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1299                 q_vector = adapter->q_vector[q_idx];
1300                 napi_enable(&q_vector->napi);
1301         }
1302 }
1303
1304 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1305 {
1306         int q_idx;
1307         struct ixgbevf_q_vector *q_vector;
1308         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1309
1310         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1311                 q_vector = adapter->q_vector[q_idx];
1312                 napi_disable(&q_vector->napi);
1313         }
1314 }
1315
1316 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1317 {
1318         struct net_device *netdev = adapter->netdev;
1319         int i;
1320
1321         ixgbevf_set_rx_mode(netdev);
1322
1323         ixgbevf_restore_vlan(adapter);
1324
1325         ixgbevf_configure_tx(adapter);
1326         ixgbevf_configure_rx(adapter);
1327         for (i = 0; i < adapter->num_rx_queues; i++) {
1328                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1329                 ixgbevf_alloc_rx_buffers(adapter, ring,
1330                                          IXGBE_DESC_UNUSED(ring));
1331         }
1332 }
1333
1334 #define IXGBEVF_MAX_RX_DESC_POLL 10
1335 static void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1336                                          int rxr)
1337 {
1338         struct ixgbe_hw *hw = &adapter->hw;
1339         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1340         u32 rxdctl;
1341         int j = adapter->rx_ring[rxr].reg_idx;
1342
1343         do {
1344                 usleep_range(1000, 2000);
1345                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1346         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
1347
1348         if (!wait_loop)
1349                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not set while polling\n",
1350                        rxr);
1351
1352         ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1353                                 (adapter->rx_ring[rxr].count - 1));
1354 }
1355
1356 static void ixgbevf_disable_rx_queue(struct ixgbevf_adapter *adapter,
1357                                      struct ixgbevf_ring *ring)
1358 {
1359         struct ixgbe_hw *hw = &adapter->hw;
1360         int wait_loop = IXGBEVF_MAX_RX_DESC_POLL;
1361         u32 rxdctl;
1362         u8 reg_idx = ring->reg_idx;
1363
1364         rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1365         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
1366
1367         /* write value back with RXDCTL.ENABLE bit cleared */
1368         IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(reg_idx), rxdctl);
1369
1370         /* the hardware may take up to 100us to really disable the rx queue */
1371         do {
1372                 udelay(10);
1373                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(reg_idx));
1374         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
1375
1376         if (!wait_loop)
1377                 hw_dbg(hw, "RXDCTL.ENABLE queue %d not cleared while polling\n",
1378                        reg_idx);
1379 }
1380
1381 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1382 {
1383         /* Only save pre-reset stats if there are some */
1384         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1385                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1386                         adapter->stats.base_vfgprc;
1387                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1388                         adapter->stats.base_vfgptc;
1389                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1390                         adapter->stats.base_vfgorc;
1391                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1392                         adapter->stats.base_vfgotc;
1393                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1394                         adapter->stats.base_vfmprc;
1395         }
1396 }
1397
1398 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1399 {
1400         struct ixgbe_hw *hw = &adapter->hw;
1401
1402         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1403         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1404         adapter->stats.last_vfgorc |=
1405                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1406         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1407         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1408         adapter->stats.last_vfgotc |=
1409                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1410         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1411
1412         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1413         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1414         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1415         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1416         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1417 }
1418
1419 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1420 {
1421         struct ixgbe_hw *hw = &adapter->hw;
1422         int api[] = { ixgbe_mbox_api_11,
1423                       ixgbe_mbox_api_10,
1424                       ixgbe_mbox_api_unknown };
1425         int err = 0, idx = 0;
1426
1427         spin_lock_bh(&adapter->mbx_lock);
1428
1429         while (api[idx] != ixgbe_mbox_api_unknown) {
1430                 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1431                 if (!err)
1432                         break;
1433                 idx++;
1434         }
1435
1436         spin_unlock_bh(&adapter->mbx_lock);
1437 }
1438
1439 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1440 {
1441         struct net_device *netdev = adapter->netdev;
1442         struct ixgbe_hw *hw = &adapter->hw;
1443         int i, j = 0;
1444         int num_rx_rings = adapter->num_rx_queues;
1445         u32 txdctl, rxdctl;
1446
1447         for (i = 0; i < adapter->num_tx_queues; i++) {
1448                 j = adapter->tx_ring[i].reg_idx;
1449                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1450                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1451                 txdctl |= (8 << 16);
1452                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1453         }
1454
1455         for (i = 0; i < adapter->num_tx_queues; i++) {
1456                 j = adapter->tx_ring[i].reg_idx;
1457                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1458                 txdctl |= IXGBE_TXDCTL_ENABLE;
1459                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1460         }
1461
1462         for (i = 0; i < num_rx_rings; i++) {
1463                 j = adapter->rx_ring[i].reg_idx;
1464                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1465                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1466                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1467                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1468                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1469                                    IXGBE_RXDCTL_RLPML_EN);
1470                 }
1471                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1472                 ixgbevf_rx_desc_queue_enable(adapter, i);
1473         }
1474
1475         ixgbevf_configure_msix(adapter);
1476
1477         spin_lock_bh(&adapter->mbx_lock);
1478
1479         if (is_valid_ether_addr(hw->mac.addr))
1480                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1481         else
1482                 hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1483
1484         spin_unlock_bh(&adapter->mbx_lock);
1485
1486         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1487         ixgbevf_napi_enable_all(adapter);
1488
1489         /* enable transmits */
1490         netif_tx_start_all_queues(netdev);
1491
1492         ixgbevf_save_reset_stats(adapter);
1493         ixgbevf_init_last_counter_stats(adapter);
1494
1495         hw->mac.get_link_status = 1;
1496         mod_timer(&adapter->watchdog_timer, jiffies);
1497 }
1498
1499 static int ixgbevf_reset_queues(struct ixgbevf_adapter *adapter)
1500 {
1501         struct ixgbe_hw *hw = &adapter->hw;
1502         struct ixgbevf_ring *rx_ring;
1503         unsigned int def_q = 0;
1504         unsigned int num_tcs = 0;
1505         unsigned int num_rx_queues = 1;
1506         int err, i;
1507
1508         spin_lock_bh(&adapter->mbx_lock);
1509
1510         /* fetch queue configuration from the PF */
1511         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
1512
1513         spin_unlock_bh(&adapter->mbx_lock);
1514
1515         if (err)
1516                 return err;
1517
1518         if (num_tcs > 1) {
1519                 /* update default Tx ring register index */
1520                 adapter->tx_ring[0].reg_idx = def_q;
1521
1522                 /* we need as many queues as traffic classes */
1523                 num_rx_queues = num_tcs;
1524         }
1525
1526         /* nothing to do if we have the correct number of queues */
1527         if (adapter->num_rx_queues == num_rx_queues)
1528                 return 0;
1529
1530         /* allocate new rings */
1531         rx_ring = kcalloc(num_rx_queues,
1532                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
1533         if (!rx_ring)
1534                 return -ENOMEM;
1535
1536         /* setup ring fields */
1537         for (i = 0; i < num_rx_queues; i++) {
1538                 rx_ring[i].count = adapter->rx_ring_count;
1539                 rx_ring[i].queue_index = i;
1540                 rx_ring[i].reg_idx = i;
1541                 rx_ring[i].dev = &adapter->pdev->dev;
1542                 rx_ring[i].netdev = adapter->netdev;
1543
1544                 /* allocate resources on the ring */
1545                 err = ixgbevf_setup_rx_resources(adapter, &rx_ring[i]);
1546                 if (err) {
1547                         while (i) {
1548                                 i--;
1549                                 ixgbevf_free_rx_resources(adapter, &rx_ring[i]);
1550                         }
1551                         kfree(rx_ring);
1552                         return err;
1553                 }
1554         }
1555
1556         /* free the existing rings and queues */
1557         ixgbevf_free_all_rx_resources(adapter);
1558         adapter->num_rx_queues = 0;
1559         kfree(adapter->rx_ring);
1560
1561         /* move new rings into position on the adapter struct */
1562         adapter->rx_ring = rx_ring;
1563         adapter->num_rx_queues = num_rx_queues;
1564
1565         /* reset ring to vector mapping */
1566         ixgbevf_reset_q_vectors(adapter);
1567         ixgbevf_map_rings_to_vectors(adapter);
1568
1569         return 0;
1570 }
1571
1572 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1573 {
1574         struct ixgbe_hw *hw = &adapter->hw;
1575
1576         ixgbevf_reset_queues(adapter);
1577
1578         ixgbevf_configure(adapter);
1579
1580         ixgbevf_up_complete(adapter);
1581
1582         /* clear any pending interrupts, may auto mask */
1583         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1584
1585         ixgbevf_irq_enable(adapter);
1586 }
1587
1588 /**
1589  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1590  * @adapter: board private structure
1591  * @rx_ring: ring to free buffers from
1592  **/
1593 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1594                                   struct ixgbevf_ring *rx_ring)
1595 {
1596         struct pci_dev *pdev = adapter->pdev;
1597         unsigned long size;
1598         unsigned int i;
1599
1600         if (!rx_ring->rx_buffer_info)
1601                 return;
1602
1603         /* Free all the Rx ring sk_buffs */
1604         for (i = 0; i < rx_ring->count; i++) {
1605                 struct ixgbevf_rx_buffer *rx_buffer_info;
1606
1607                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1608                 if (rx_buffer_info->dma) {
1609                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1610                                          rx_ring->rx_buf_len,
1611                                          DMA_FROM_DEVICE);
1612                         rx_buffer_info->dma = 0;
1613                 }
1614                 if (rx_buffer_info->skb) {
1615                         struct sk_buff *skb = rx_buffer_info->skb;
1616                         rx_buffer_info->skb = NULL;
1617                         do {
1618                                 struct sk_buff *this = skb;
1619                                 skb = IXGBE_CB(skb)->prev;
1620                                 dev_kfree_skb(this);
1621                         } while (skb);
1622                 }
1623         }
1624
1625         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1626         memset(rx_ring->rx_buffer_info, 0, size);
1627
1628         /* Zero out the descriptor ring */
1629         memset(rx_ring->desc, 0, rx_ring->size);
1630
1631         rx_ring->next_to_clean = 0;
1632         rx_ring->next_to_use = 0;
1633
1634         if (rx_ring->head)
1635                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1636         if (rx_ring->tail)
1637                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1638 }
1639
1640 /**
1641  * ixgbevf_clean_tx_ring - Free Tx Buffers
1642  * @adapter: board private structure
1643  * @tx_ring: ring to be cleaned
1644  **/
1645 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1646                                   struct ixgbevf_ring *tx_ring)
1647 {
1648         struct ixgbevf_tx_buffer *tx_buffer_info;
1649         unsigned long size;
1650         unsigned int i;
1651
1652         if (!tx_ring->tx_buffer_info)
1653                 return;
1654
1655         /* Free all the Tx ring sk_buffs */
1656         for (i = 0; i < tx_ring->count; i++) {
1657                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1658                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1659         }
1660
1661         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1662         memset(tx_ring->tx_buffer_info, 0, size);
1663
1664         memset(tx_ring->desc, 0, tx_ring->size);
1665
1666         tx_ring->next_to_use = 0;
1667         tx_ring->next_to_clean = 0;
1668
1669         if (tx_ring->head)
1670                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1671         if (tx_ring->tail)
1672                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1673 }
1674
1675 /**
1676  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1677  * @adapter: board private structure
1678  **/
1679 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1680 {
1681         int i;
1682
1683         for (i = 0; i < adapter->num_rx_queues; i++)
1684                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1685 }
1686
1687 /**
1688  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1689  * @adapter: board private structure
1690  **/
1691 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1692 {
1693         int i;
1694
1695         for (i = 0; i < adapter->num_tx_queues; i++)
1696                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1697 }
1698
1699 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1700 {
1701         struct net_device *netdev = adapter->netdev;
1702         struct ixgbe_hw *hw = &adapter->hw;
1703         u32 txdctl;
1704         int i, j;
1705
1706         /* signal that we are down to the interrupt handler */
1707         set_bit(__IXGBEVF_DOWN, &adapter->state);
1708
1709         /* disable all enabled rx queues */
1710         for (i = 0; i < adapter->num_rx_queues; i++)
1711                 ixgbevf_disable_rx_queue(adapter, &adapter->rx_ring[i]);
1712
1713         netif_tx_disable(netdev);
1714
1715         msleep(10);
1716
1717         netif_tx_stop_all_queues(netdev);
1718
1719         ixgbevf_irq_disable(adapter);
1720
1721         ixgbevf_napi_disable_all(adapter);
1722
1723         del_timer_sync(&adapter->watchdog_timer);
1724         /* can't call flush scheduled work here because it can deadlock
1725          * if linkwatch_event tries to acquire the rtnl_lock which we are
1726          * holding */
1727         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1728                 msleep(1);
1729
1730         /* disable transmits in the hardware now that interrupts are off */
1731         for (i = 0; i < adapter->num_tx_queues; i++) {
1732                 j = adapter->tx_ring[i].reg_idx;
1733                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1734                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1735                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1736         }
1737
1738         netif_carrier_off(netdev);
1739
1740         if (!pci_channel_offline(adapter->pdev))
1741                 ixgbevf_reset(adapter);
1742
1743         ixgbevf_clean_all_tx_rings(adapter);
1744         ixgbevf_clean_all_rx_rings(adapter);
1745 }
1746
1747 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1748 {
1749         WARN_ON(in_interrupt());
1750
1751         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1752                 msleep(1);
1753
1754         ixgbevf_down(adapter);
1755         ixgbevf_up(adapter);
1756
1757         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1758 }
1759
1760 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1761 {
1762         struct ixgbe_hw *hw = &adapter->hw;
1763         struct net_device *netdev = adapter->netdev;
1764
1765         if (hw->mac.ops.reset_hw(hw)) {
1766                 hw_dbg(hw, "PF still resetting\n");
1767         } else {
1768                 hw->mac.ops.init_hw(hw);
1769                 ixgbevf_negotiate_api(adapter);
1770         }
1771
1772         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1773                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1774                        netdev->addr_len);
1775                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1776                        netdev->addr_len);
1777         }
1778 }
1779
1780 static int ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1781                                         int vectors)
1782 {
1783         int err = 0;
1784         int vector_threshold;
1785
1786         /* We'll want at least 2 (vector_threshold):
1787          * 1) TxQ[0] + RxQ[0] handler
1788          * 2) Other (Link Status Change, etc.)
1789          */
1790         vector_threshold = MIN_MSIX_COUNT;
1791
1792         /* The more we get, the more we will assign to Tx/Rx Cleanup
1793          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1794          * Right now, we simply care about how many we'll get; we'll
1795          * set them up later while requesting irq's.
1796          */
1797         while (vectors >= vector_threshold) {
1798                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1799                                       vectors);
1800                 if (!err || err < 0) /* Success or a nasty failure. */
1801                         break;
1802                 else /* err == number of vectors we should try again with */
1803                         vectors = err;
1804         }
1805
1806         if (vectors < vector_threshold)
1807                 err = -ENOMEM;
1808
1809         if (err) {
1810                 dev_err(&adapter->pdev->dev,
1811                         "Unable to allocate MSI-X interrupts\n");
1812                 kfree(adapter->msix_entries);
1813                 adapter->msix_entries = NULL;
1814         } else {
1815                 /*
1816                  * Adjust for only the vectors we'll use, which is minimum
1817                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1818                  * vectors we were allocated.
1819                  */
1820                 adapter->num_msix_vectors = vectors;
1821         }
1822
1823         return err;
1824 }
1825
1826 /**
1827  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1828  * @adapter: board private structure to initialize
1829  *
1830  * This is the top level queue allocation routine.  The order here is very
1831  * important, starting with the "most" number of features turned on at once,
1832  * and ending with the smallest set of features.  This way large combinations
1833  * can be allocated if they're turned on, and smaller combinations are the
1834  * fallthrough conditions.
1835  *
1836  **/
1837 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1838 {
1839         /* Start with base case */
1840         adapter->num_rx_queues = 1;
1841         adapter->num_tx_queues = 1;
1842 }
1843
1844 /**
1845  * ixgbevf_alloc_queues - Allocate memory for all rings
1846  * @adapter: board private structure to initialize
1847  *
1848  * We allocate one ring per queue at run-time since we don't know the
1849  * number of queues at compile-time.  The polling_netdev array is
1850  * intended for Multiqueue, but should work fine with a single queue.
1851  **/
1852 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1853 {
1854         int i;
1855
1856         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1857                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1858         if (!adapter->tx_ring)
1859                 goto err_tx_ring_allocation;
1860
1861         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1862                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1863         if (!adapter->rx_ring)
1864                 goto err_rx_ring_allocation;
1865
1866         for (i = 0; i < adapter->num_tx_queues; i++) {
1867                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1868                 adapter->tx_ring[i].queue_index = i;
1869                 /* reg_idx may be remapped later by DCB config */
1870                 adapter->tx_ring[i].reg_idx = i;
1871                 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1872                 adapter->tx_ring[i].netdev = adapter->netdev;
1873         }
1874
1875         for (i = 0; i < adapter->num_rx_queues; i++) {
1876                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1877                 adapter->rx_ring[i].queue_index = i;
1878                 adapter->rx_ring[i].reg_idx = i;
1879                 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1880                 adapter->rx_ring[i].netdev = adapter->netdev;
1881         }
1882
1883         return 0;
1884
1885 err_rx_ring_allocation:
1886         kfree(adapter->tx_ring);
1887 err_tx_ring_allocation:
1888         return -ENOMEM;
1889 }
1890
1891 /**
1892  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1893  * @adapter: board private structure to initialize
1894  *
1895  * Attempt to configure the interrupts using the best available
1896  * capabilities of the hardware and the kernel.
1897  **/
1898 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1899 {
1900         struct net_device *netdev = adapter->netdev;
1901         int err = 0;
1902         int vector, v_budget;
1903
1904         /*
1905          * It's easy to be greedy for MSI-X vectors, but it really
1906          * doesn't do us much good if we have a lot more vectors
1907          * than CPU's.  So let's be conservative and only ask for
1908          * (roughly) the same number of vectors as there are CPU's.
1909          * The default is to use pairs of vectors.
1910          */
1911         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1912         v_budget = min_t(int, v_budget, num_online_cpus());
1913         v_budget += NON_Q_VECTORS;
1914
1915         /* A failure in MSI-X entry allocation isn't fatal, but it does
1916          * mean we disable MSI-X capabilities of the adapter. */
1917         adapter->msix_entries = kcalloc(v_budget,
1918                                         sizeof(struct msix_entry), GFP_KERNEL);
1919         if (!adapter->msix_entries) {
1920                 err = -ENOMEM;
1921                 goto out;
1922         }
1923
1924         for (vector = 0; vector < v_budget; vector++)
1925                 adapter->msix_entries[vector].entry = vector;
1926
1927         err = ixgbevf_acquire_msix_vectors(adapter, v_budget);
1928         if (err)
1929                 goto out;
1930
1931         err = netif_set_real_num_tx_queues(netdev, adapter->num_tx_queues);
1932         if (err)
1933                 goto out;
1934
1935         err = netif_set_real_num_rx_queues(netdev, adapter->num_rx_queues);
1936
1937 out:
1938         return err;
1939 }
1940
1941 /**
1942  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
1943  * @adapter: board private structure to initialize
1944  *
1945  * We allocate one q_vector per queue interrupt.  If allocation fails we
1946  * return -ENOMEM.
1947  **/
1948 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
1949 {
1950         int q_idx, num_q_vectors;
1951         struct ixgbevf_q_vector *q_vector;
1952
1953         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1954
1955         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1956                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
1957                 if (!q_vector)
1958                         goto err_out;
1959                 q_vector->adapter = adapter;
1960                 q_vector->v_idx = q_idx;
1961                 netif_napi_add(adapter->netdev, &q_vector->napi,
1962                                ixgbevf_poll, 64);
1963                 adapter->q_vector[q_idx] = q_vector;
1964         }
1965
1966         return 0;
1967
1968 err_out:
1969         while (q_idx) {
1970                 q_idx--;
1971                 q_vector = adapter->q_vector[q_idx];
1972                 netif_napi_del(&q_vector->napi);
1973                 kfree(q_vector);
1974                 adapter->q_vector[q_idx] = NULL;
1975         }
1976         return -ENOMEM;
1977 }
1978
1979 /**
1980  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
1981  * @adapter: board private structure to initialize
1982  *
1983  * This function frees the memory allocated to the q_vectors.  In addition if
1984  * NAPI is enabled it will delete any references to the NAPI struct prior
1985  * to freeing the q_vector.
1986  **/
1987 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
1988 {
1989         int q_idx, num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1990
1991         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1992                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
1993
1994                 adapter->q_vector[q_idx] = NULL;
1995                 netif_napi_del(&q_vector->napi);
1996                 kfree(q_vector);
1997         }
1998 }
1999
2000 /**
2001  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
2002  * @adapter: board private structure
2003  *
2004  **/
2005 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
2006 {
2007         pci_disable_msix(adapter->pdev);
2008         kfree(adapter->msix_entries);
2009         adapter->msix_entries = NULL;
2010 }
2011
2012 /**
2013  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
2014  * @adapter: board private structure to initialize
2015  *
2016  **/
2017 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
2018 {
2019         int err;
2020
2021         /* Number of supported queues */
2022         ixgbevf_set_num_queues(adapter);
2023
2024         err = ixgbevf_set_interrupt_capability(adapter);
2025         if (err) {
2026                 hw_dbg(&adapter->hw,
2027                        "Unable to setup interrupt capabilities\n");
2028                 goto err_set_interrupt;
2029         }
2030
2031         err = ixgbevf_alloc_q_vectors(adapter);
2032         if (err) {
2033                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
2034                        "vectors\n");
2035                 goto err_alloc_q_vectors;
2036         }
2037
2038         err = ixgbevf_alloc_queues(adapter);
2039         if (err) {
2040                 pr_err("Unable to allocate memory for queues\n");
2041                 goto err_alloc_queues;
2042         }
2043
2044         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
2045                "Tx Queue count = %u\n",
2046                (adapter->num_rx_queues > 1) ? "Enabled" :
2047                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2048
2049         set_bit(__IXGBEVF_DOWN, &adapter->state);
2050
2051         return 0;
2052 err_alloc_queues:
2053         ixgbevf_free_q_vectors(adapter);
2054 err_alloc_q_vectors:
2055         ixgbevf_reset_interrupt_capability(adapter);
2056 err_set_interrupt:
2057         return err;
2058 }
2059
2060 /**
2061  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
2062  * @adapter: board private structure to clear interrupt scheme on
2063  *
2064  * We go through and clear interrupt specific resources and reset the structure
2065  * to pre-load conditions
2066  **/
2067 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
2068 {
2069         adapter->num_tx_queues = 0;
2070         adapter->num_rx_queues = 0;
2071
2072         ixgbevf_free_q_vectors(adapter);
2073         ixgbevf_reset_interrupt_capability(adapter);
2074 }
2075
2076 /**
2077  * ixgbevf_sw_init - Initialize general software structures
2078  * (struct ixgbevf_adapter)
2079  * @adapter: board private structure to initialize
2080  *
2081  * ixgbevf_sw_init initializes the Adapter private data structure.
2082  * Fields are initialized based on PCI device information and
2083  * OS network device settings (MTU size).
2084  **/
2085 static int ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
2086 {
2087         struct ixgbe_hw *hw = &adapter->hw;
2088         struct pci_dev *pdev = adapter->pdev;
2089         struct net_device *netdev = adapter->netdev;
2090         int err;
2091
2092         /* PCI config space info */
2093
2094         hw->vendor_id = pdev->vendor;
2095         hw->device_id = pdev->device;
2096         hw->revision_id = pdev->revision;
2097         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2098         hw->subsystem_device_id = pdev->subsystem_device;
2099
2100         hw->mbx.ops.init_params(hw);
2101
2102         /* assume legacy case in which PF would only give VF 2 queues */
2103         hw->mac.max_tx_queues = 2;
2104         hw->mac.max_rx_queues = 2;
2105
2106         /* lock to protect mailbox accesses */
2107         spin_lock_init(&adapter->mbx_lock);
2108
2109         err = hw->mac.ops.reset_hw(hw);
2110         if (err) {
2111                 dev_info(&pdev->dev,
2112                          "PF still in reset state.  Is the PF interface up?\n");
2113         } else {
2114                 err = hw->mac.ops.init_hw(hw);
2115                 if (err) {
2116                         pr_err("init_shared_code failed: %d\n", err);
2117                         goto out;
2118                 }
2119                 ixgbevf_negotiate_api(adapter);
2120                 err = hw->mac.ops.get_mac_addr(hw, hw->mac.addr);
2121                 if (err)
2122                         dev_info(&pdev->dev, "Error reading MAC address\n");
2123                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2124                         dev_info(&pdev->dev,
2125                                  "MAC address not assigned by administrator.\n");
2126                 memcpy(netdev->dev_addr, hw->mac.addr, netdev->addr_len);
2127         }
2128
2129         if (!is_valid_ether_addr(netdev->dev_addr)) {
2130                 dev_info(&pdev->dev, "Assigning random MAC address\n");
2131                 eth_hw_addr_random(netdev);
2132                 memcpy(hw->mac.addr, netdev->dev_addr, netdev->addr_len);
2133         }
2134
2135         /* Enable dynamic interrupt throttling rates */
2136         adapter->rx_itr_setting = 1;
2137         adapter->tx_itr_setting = 1;
2138
2139         /* set default ring sizes */
2140         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
2141         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
2142
2143         set_bit(__IXGBEVF_DOWN, &adapter->state);
2144         return 0;
2145
2146 out:
2147         return err;
2148 }
2149
2150 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
2151         {                                                       \
2152                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
2153                 if (current_counter < last_counter)             \
2154                         counter += 0x100000000LL;               \
2155                 last_counter = current_counter;                 \
2156                 counter &= 0xFFFFFFFF00000000LL;                \
2157                 counter |= current_counter;                     \
2158         }
2159
2160 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
2161         {                                                                \
2162                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2163                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2164                 u64 current_counter = (current_counter_msb << 32) |      \
2165                         current_counter_lsb;                             \
2166                 if (current_counter < last_counter)                      \
2167                         counter += 0x1000000000LL;                       \
2168                 last_counter = current_counter;                          \
2169                 counter &= 0xFFFFFFF000000000LL;                         \
2170                 counter |= current_counter;                              \
2171         }
2172 /**
2173  * ixgbevf_update_stats - Update the board statistics counters.
2174  * @adapter: board private structure
2175  **/
2176 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2177 {
2178         struct ixgbe_hw *hw = &adapter->hw;
2179         int i;
2180
2181         if (!adapter->link_up)
2182                 return;
2183
2184         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2185                                 adapter->stats.vfgprc);
2186         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2187                                 adapter->stats.vfgptc);
2188         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2189                                 adapter->stats.last_vfgorc,
2190                                 adapter->stats.vfgorc);
2191         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2192                                 adapter->stats.last_vfgotc,
2193                                 adapter->stats.vfgotc);
2194         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2195                                 adapter->stats.vfmprc);
2196
2197         for (i = 0;  i  < adapter->num_rx_queues;  i++) {
2198                 adapter->hw_csum_rx_error +=
2199                         adapter->rx_ring[i].hw_csum_rx_error;
2200                 adapter->hw_csum_rx_good +=
2201                         adapter->rx_ring[i].hw_csum_rx_good;
2202                 adapter->rx_ring[i].hw_csum_rx_error = 0;
2203                 adapter->rx_ring[i].hw_csum_rx_good = 0;
2204         }
2205 }
2206
2207 /**
2208  * ixgbevf_watchdog - Timer Call-back
2209  * @data: pointer to adapter cast into an unsigned long
2210  **/
2211 static void ixgbevf_watchdog(unsigned long data)
2212 {
2213         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2214         struct ixgbe_hw *hw = &adapter->hw;
2215         u32 eics = 0;
2216         int i;
2217
2218         /*
2219          * Do the watchdog outside of interrupt context due to the lovely
2220          * delays that some of the newer hardware requires
2221          */
2222
2223         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2224                 goto watchdog_short_circuit;
2225
2226         /* get one bit for every active tx/rx interrupt vector */
2227         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2228                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2229                 if (qv->rx.ring || qv->tx.ring)
2230                         eics |= 1 << i;
2231         }
2232
2233         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2234
2235 watchdog_short_circuit:
2236         schedule_work(&adapter->watchdog_task);
2237 }
2238
2239 /**
2240  * ixgbevf_tx_timeout - Respond to a Tx Hang
2241  * @netdev: network interface device structure
2242  **/
2243 static void ixgbevf_tx_timeout(struct net_device *netdev)
2244 {
2245         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2246
2247         /* Do the reset outside of interrupt context */
2248         schedule_work(&adapter->reset_task);
2249 }
2250
2251 static void ixgbevf_reset_task(struct work_struct *work)
2252 {
2253         struct ixgbevf_adapter *adapter;
2254         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2255
2256         /* If we're already down or resetting, just bail */
2257         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2258             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2259                 return;
2260
2261         adapter->tx_timeout_count++;
2262
2263         ixgbevf_reinit_locked(adapter);
2264 }
2265
2266 /**
2267  * ixgbevf_watchdog_task - worker thread to bring link up
2268  * @work: pointer to work_struct containing our data
2269  **/
2270 static void ixgbevf_watchdog_task(struct work_struct *work)
2271 {
2272         struct ixgbevf_adapter *adapter = container_of(work,
2273                                                        struct ixgbevf_adapter,
2274                                                        watchdog_task);
2275         struct net_device *netdev = adapter->netdev;
2276         struct ixgbe_hw *hw = &adapter->hw;
2277         u32 link_speed = adapter->link_speed;
2278         bool link_up = adapter->link_up;
2279         s32 need_reset;
2280
2281         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2282
2283         /*
2284          * Always check the link on the watchdog because we have
2285          * no LSC interrupt
2286          */
2287         spin_lock_bh(&adapter->mbx_lock);
2288
2289         need_reset = hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
2290
2291         spin_unlock_bh(&adapter->mbx_lock);
2292
2293         if (need_reset) {
2294                 adapter->link_up = link_up;
2295                 adapter->link_speed = link_speed;
2296                 netif_carrier_off(netdev);
2297                 netif_tx_stop_all_queues(netdev);
2298                 schedule_work(&adapter->reset_task);
2299                 goto pf_has_reset;
2300         }
2301         adapter->link_up = link_up;
2302         adapter->link_speed = link_speed;
2303
2304         if (link_up) {
2305                 if (!netif_carrier_ok(netdev)) {
2306                         char *link_speed_string;
2307                         switch (link_speed) {
2308                         case IXGBE_LINK_SPEED_10GB_FULL:
2309                                 link_speed_string = "10 Gbps";
2310                                 break;
2311                         case IXGBE_LINK_SPEED_1GB_FULL:
2312                                 link_speed_string = "1 Gbps";
2313                                 break;
2314                         case IXGBE_LINK_SPEED_100_FULL:
2315                                 link_speed_string = "100 Mbps";
2316                                 break;
2317                         default:
2318                                 link_speed_string = "unknown speed";
2319                                 break;
2320                         }
2321                         dev_info(&adapter->pdev->dev,
2322                                 "NIC Link is Up, %s\n", link_speed_string);
2323                         netif_carrier_on(netdev);
2324                         netif_tx_wake_all_queues(netdev);
2325                 }
2326         } else {
2327                 adapter->link_up = false;
2328                 adapter->link_speed = 0;
2329                 if (netif_carrier_ok(netdev)) {
2330                         dev_info(&adapter->pdev->dev, "NIC Link is Down\n");
2331                         netif_carrier_off(netdev);
2332                         netif_tx_stop_all_queues(netdev);
2333                 }
2334         }
2335
2336         ixgbevf_update_stats(adapter);
2337
2338 pf_has_reset:
2339         /* Reset the timer */
2340         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2341                 mod_timer(&adapter->watchdog_timer,
2342                           round_jiffies(jiffies + (2 * HZ)));
2343
2344         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2345 }
2346
2347 /**
2348  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2349  * @adapter: board private structure
2350  * @tx_ring: Tx descriptor ring for a specific queue
2351  *
2352  * Free all transmit software resources
2353  **/
2354 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2355                                struct ixgbevf_ring *tx_ring)
2356 {
2357         struct pci_dev *pdev = adapter->pdev;
2358
2359         ixgbevf_clean_tx_ring(adapter, tx_ring);
2360
2361         vfree(tx_ring->tx_buffer_info);
2362         tx_ring->tx_buffer_info = NULL;
2363
2364         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2365                           tx_ring->dma);
2366
2367         tx_ring->desc = NULL;
2368 }
2369
2370 /**
2371  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2372  * @adapter: board private structure
2373  *
2374  * Free all transmit software resources
2375  **/
2376 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2377 {
2378         int i;
2379
2380         for (i = 0; i < adapter->num_tx_queues; i++)
2381                 if (adapter->tx_ring[i].desc)
2382                         ixgbevf_free_tx_resources(adapter,
2383                                                   &adapter->tx_ring[i]);
2384
2385 }
2386
2387 /**
2388  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2389  * @adapter: board private structure
2390  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2391  *
2392  * Return 0 on success, negative on failure
2393  **/
2394 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2395                                struct ixgbevf_ring *tx_ring)
2396 {
2397         struct pci_dev *pdev = adapter->pdev;
2398         int size;
2399
2400         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2401         tx_ring->tx_buffer_info = vzalloc(size);
2402         if (!tx_ring->tx_buffer_info)
2403                 goto err;
2404
2405         /* round up to nearest 4K */
2406         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2407         tx_ring->size = ALIGN(tx_ring->size, 4096);
2408
2409         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2410                                            &tx_ring->dma, GFP_KERNEL);
2411         if (!tx_ring->desc)
2412                 goto err;
2413
2414         tx_ring->next_to_use = 0;
2415         tx_ring->next_to_clean = 0;
2416         return 0;
2417
2418 err:
2419         vfree(tx_ring->tx_buffer_info);
2420         tx_ring->tx_buffer_info = NULL;
2421         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2422                "descriptor ring\n");
2423         return -ENOMEM;
2424 }
2425
2426 /**
2427  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2428  * @adapter: board private structure
2429  *
2430  * If this function returns with an error, then it's possible one or
2431  * more of the rings is populated (while the rest are not).  It is the
2432  * callers duty to clean those orphaned rings.
2433  *
2434  * Return 0 on success, negative on failure
2435  **/
2436 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2437 {
2438         int i, err = 0;
2439
2440         for (i = 0; i < adapter->num_tx_queues; i++) {
2441                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2442                 if (!err)
2443                         continue;
2444                 hw_dbg(&adapter->hw,
2445                        "Allocation for Tx Queue %u failed\n", i);
2446                 break;
2447         }
2448
2449         return err;
2450 }
2451
2452 /**
2453  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2454  * @adapter: board private structure
2455  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2456  *
2457  * Returns 0 on success, negative on failure
2458  **/
2459 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2460                                struct ixgbevf_ring *rx_ring)
2461 {
2462         struct pci_dev *pdev = adapter->pdev;
2463         int size;
2464
2465         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2466         rx_ring->rx_buffer_info = vzalloc(size);
2467         if (!rx_ring->rx_buffer_info)
2468                 goto alloc_failed;
2469
2470         /* Round up to nearest 4K */
2471         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2472         rx_ring->size = ALIGN(rx_ring->size, 4096);
2473
2474         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2475                                            &rx_ring->dma, GFP_KERNEL);
2476
2477         if (!rx_ring->desc) {
2478                 vfree(rx_ring->rx_buffer_info);
2479                 rx_ring->rx_buffer_info = NULL;
2480                 goto alloc_failed;
2481         }
2482
2483         rx_ring->next_to_clean = 0;
2484         rx_ring->next_to_use = 0;
2485
2486         return 0;
2487 alloc_failed:
2488         return -ENOMEM;
2489 }
2490
2491 /**
2492  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2493  * @adapter: board private structure
2494  *
2495  * If this function returns with an error, then it's possible one or
2496  * more of the rings is populated (while the rest are not).  It is the
2497  * callers duty to clean those orphaned rings.
2498  *
2499  * Return 0 on success, negative on failure
2500  **/
2501 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2502 {
2503         int i, err = 0;
2504
2505         for (i = 0; i < adapter->num_rx_queues; i++) {
2506                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2507                 if (!err)
2508                         continue;
2509                 hw_dbg(&adapter->hw,
2510                        "Allocation for Rx Queue %u failed\n", i);
2511                 break;
2512         }
2513         return err;
2514 }
2515
2516 /**
2517  * ixgbevf_free_rx_resources - Free Rx Resources
2518  * @adapter: board private structure
2519  * @rx_ring: ring to clean the resources from
2520  *
2521  * Free all receive software resources
2522  **/
2523 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2524                                struct ixgbevf_ring *rx_ring)
2525 {
2526         struct pci_dev *pdev = adapter->pdev;
2527
2528         ixgbevf_clean_rx_ring(adapter, rx_ring);
2529
2530         vfree(rx_ring->rx_buffer_info);
2531         rx_ring->rx_buffer_info = NULL;
2532
2533         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2534                           rx_ring->dma);
2535
2536         rx_ring->desc = NULL;
2537 }
2538
2539 /**
2540  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2541  * @adapter: board private structure
2542  *
2543  * Free all receive software resources
2544  **/
2545 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2546 {
2547         int i;
2548
2549         for (i = 0; i < adapter->num_rx_queues; i++)
2550                 if (adapter->rx_ring[i].desc)
2551                         ixgbevf_free_rx_resources(adapter,
2552                                                   &adapter->rx_ring[i]);
2553 }
2554
2555 static int ixgbevf_setup_queues(struct ixgbevf_adapter *adapter)
2556 {
2557         struct ixgbe_hw *hw = &adapter->hw;
2558         struct ixgbevf_ring *rx_ring;
2559         unsigned int def_q = 0;
2560         unsigned int num_tcs = 0;
2561         unsigned int num_rx_queues = 1;
2562         int err, i;
2563
2564         spin_lock_bh(&adapter->mbx_lock);
2565
2566         /* fetch queue configuration from the PF */
2567         err = ixgbevf_get_queues(hw, &num_tcs, &def_q);
2568
2569         spin_unlock_bh(&adapter->mbx_lock);
2570
2571         if (err)
2572                 return err;
2573
2574         if (num_tcs > 1) {
2575                 /* update default Tx ring register index */
2576                 adapter->tx_ring[0].reg_idx = def_q;
2577
2578                 /* we need as many queues as traffic classes */
2579                 num_rx_queues = num_tcs;
2580         }
2581
2582         /* nothing to do if we have the correct number of queues */
2583         if (adapter->num_rx_queues == num_rx_queues)
2584                 return 0;
2585
2586         /* allocate new rings */
2587         rx_ring = kcalloc(num_rx_queues,
2588                           sizeof(struct ixgbevf_ring), GFP_KERNEL);
2589         if (!rx_ring)
2590                 return -ENOMEM;
2591
2592         /* setup ring fields */
2593         for (i = 0; i < num_rx_queues; i++) {
2594                 rx_ring[i].count = adapter->rx_ring_count;
2595                 rx_ring[i].queue_index = i;
2596                 rx_ring[i].reg_idx = i;
2597                 rx_ring[i].dev = &adapter->pdev->dev;
2598                 rx_ring[i].netdev = adapter->netdev;
2599         }
2600
2601         /* free the existing ring and queues */
2602         adapter->num_rx_queues = 0;
2603         kfree(adapter->rx_ring);
2604
2605         /* move new rings into position on the adapter struct */
2606         adapter->rx_ring = rx_ring;
2607         adapter->num_rx_queues = num_rx_queues;
2608
2609         return 0;
2610 }
2611
2612 /**
2613  * ixgbevf_open - Called when a network interface is made active
2614  * @netdev: network interface device structure
2615  *
2616  * Returns 0 on success, negative value on failure
2617  *
2618  * The open entry point is called when a network interface is made
2619  * active by the system (IFF_UP).  At this point all resources needed
2620  * for transmit and receive operations are allocated, the interrupt
2621  * handler is registered with the OS, the watchdog timer is started,
2622  * and the stack is notified that the interface is ready.
2623  **/
2624 static int ixgbevf_open(struct net_device *netdev)
2625 {
2626         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2627         struct ixgbe_hw *hw = &adapter->hw;
2628         int err;
2629
2630         /* A previous failure to open the device because of a lack of
2631          * available MSIX vector resources may have reset the number
2632          * of msix vectors variable to zero.  The only way to recover
2633          * is to unload/reload the driver and hope that the system has
2634          * been able to recover some MSIX vector resources.
2635          */
2636         if (!adapter->num_msix_vectors)
2637                 return -ENOMEM;
2638
2639         /* disallow open during test */
2640         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2641                 return -EBUSY;
2642
2643         if (hw->adapter_stopped) {
2644                 ixgbevf_reset(adapter);
2645                 /* if adapter is still stopped then PF isn't up and
2646                  * the vf can't start. */
2647                 if (hw->adapter_stopped) {
2648                         err = IXGBE_ERR_MBX;
2649                         pr_err("Unable to start - perhaps the PF Driver isn't "
2650                                "up yet\n");
2651                         goto err_setup_reset;
2652                 }
2653         }
2654
2655         /* setup queue reg_idx and Rx queue count */
2656         err = ixgbevf_setup_queues(adapter);
2657         if (err)
2658                 goto err_setup_queues;
2659
2660         /* allocate transmit descriptors */
2661         err = ixgbevf_setup_all_tx_resources(adapter);
2662         if (err)
2663                 goto err_setup_tx;
2664
2665         /* allocate receive descriptors */
2666         err = ixgbevf_setup_all_rx_resources(adapter);
2667         if (err)
2668                 goto err_setup_rx;
2669
2670         ixgbevf_configure(adapter);
2671
2672         /*
2673          * Map the Tx/Rx rings to the vectors we were allotted.
2674          * if request_irq will be called in this function map_rings
2675          * must be called *before* up_complete
2676          */
2677         ixgbevf_map_rings_to_vectors(adapter);
2678
2679         ixgbevf_up_complete(adapter);
2680
2681         /* clear any pending interrupts, may auto mask */
2682         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2683         err = ixgbevf_request_irq(adapter);
2684         if (err)
2685                 goto err_req_irq;
2686
2687         ixgbevf_irq_enable(adapter);
2688
2689         return 0;
2690
2691 err_req_irq:
2692         ixgbevf_down(adapter);
2693 err_setup_rx:
2694         ixgbevf_free_all_rx_resources(adapter);
2695 err_setup_tx:
2696         ixgbevf_free_all_tx_resources(adapter);
2697 err_setup_queues:
2698         ixgbevf_reset(adapter);
2699
2700 err_setup_reset:
2701
2702         return err;
2703 }
2704
2705 /**
2706  * ixgbevf_close - Disables a network interface
2707  * @netdev: network interface device structure
2708  *
2709  * Returns 0, this is not allowed to fail
2710  *
2711  * The close entry point is called when an interface is de-activated
2712  * by the OS.  The hardware is still under the drivers control, but
2713  * needs to be disabled.  A global MAC reset is issued to stop the
2714  * hardware, and all transmit and receive resources are freed.
2715  **/
2716 static int ixgbevf_close(struct net_device *netdev)
2717 {
2718         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2719
2720         ixgbevf_down(adapter);
2721         ixgbevf_free_irq(adapter);
2722
2723         ixgbevf_free_all_tx_resources(adapter);
2724         ixgbevf_free_all_rx_resources(adapter);
2725
2726         return 0;
2727 }
2728
2729 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2730                                 u32 vlan_macip_lens, u32 type_tucmd,
2731                                 u32 mss_l4len_idx)
2732 {
2733         struct ixgbe_adv_tx_context_desc *context_desc;
2734         u16 i = tx_ring->next_to_use;
2735
2736         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2737
2738         i++;
2739         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2740
2741         /* set bits to identify this as an advanced context descriptor */
2742         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2743
2744         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
2745         context_desc->seqnum_seed       = 0;
2746         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
2747         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2748 }
2749
2750 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2751                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2752 {
2753         u32 vlan_macip_lens, type_tucmd;
2754         u32 mss_l4len_idx, l4len;
2755
2756         if (!skb_is_gso(skb))
2757                 return 0;
2758
2759         if (skb_header_cloned(skb)) {
2760                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2761                 if (err)
2762                         return err;
2763         }
2764
2765         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2766         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2767
2768         if (skb->protocol == htons(ETH_P_IP)) {
2769                 struct iphdr *iph = ip_hdr(skb);
2770                 iph->tot_len = 0;
2771                 iph->check = 0;
2772                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2773                                                          iph->daddr, 0,
2774                                                          IPPROTO_TCP,
2775                                                          0);
2776                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2777         } else if (skb_is_gso_v6(skb)) {
2778                 ipv6_hdr(skb)->payload_len = 0;
2779                 tcp_hdr(skb)->check =
2780                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2781                                      &ipv6_hdr(skb)->daddr,
2782                                      0, IPPROTO_TCP, 0);
2783         }
2784
2785         /* compute header lengths */
2786         l4len = tcp_hdrlen(skb);
2787         *hdr_len += l4len;
2788         *hdr_len = skb_transport_offset(skb) + l4len;
2789
2790         /* mss_l4len_id: use 1 as index for TSO */
2791         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2792         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2793         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2794
2795         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2796         vlan_macip_lens = skb_network_header_len(skb);
2797         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2798         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2799
2800         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2801                             type_tucmd, mss_l4len_idx);
2802
2803         return 1;
2804 }
2805
2806 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2807                             struct sk_buff *skb, u32 tx_flags)
2808 {
2809         u32 vlan_macip_lens = 0;
2810         u32 mss_l4len_idx = 0;
2811         u32 type_tucmd = 0;
2812
2813         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2814                 u8 l4_hdr = 0;
2815                 switch (skb->protocol) {
2816                 case __constant_htons(ETH_P_IP):
2817                         vlan_macip_lens |= skb_network_header_len(skb);
2818                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2819                         l4_hdr = ip_hdr(skb)->protocol;
2820                         break;
2821                 case __constant_htons(ETH_P_IPV6):
2822                         vlan_macip_lens |= skb_network_header_len(skb);
2823                         l4_hdr = ipv6_hdr(skb)->nexthdr;
2824                         break;
2825                 default:
2826                         if (unlikely(net_ratelimit())) {
2827                                 dev_warn(tx_ring->dev,
2828                                  "partial checksum but proto=%x!\n",
2829                                  skb->protocol);
2830                         }
2831                         break;
2832                 }
2833
2834                 switch (l4_hdr) {
2835                 case IPPROTO_TCP:
2836                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2837                         mss_l4len_idx = tcp_hdrlen(skb) <<
2838                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2839                         break;
2840                 case IPPROTO_SCTP:
2841                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2842                         mss_l4len_idx = sizeof(struct sctphdr) <<
2843                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2844                         break;
2845                 case IPPROTO_UDP:
2846                         mss_l4len_idx = sizeof(struct udphdr) <<
2847                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2848                         break;
2849                 default:
2850                         if (unlikely(net_ratelimit())) {
2851                                 dev_warn(tx_ring->dev,
2852                                  "partial checksum but l4 proto=%x!\n",
2853                                  l4_hdr);
2854                         }
2855                         break;
2856                 }
2857         }
2858
2859         /* vlan_macip_lens: MACLEN, VLAN tag */
2860         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2861         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2862
2863         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2864                             type_tucmd, mss_l4len_idx);
2865
2866         return (skb->ip_summed == CHECKSUM_PARTIAL);
2867 }
2868
2869 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2870                           struct sk_buff *skb, u32 tx_flags)
2871 {
2872         struct ixgbevf_tx_buffer *tx_buffer_info;
2873         unsigned int len;
2874         unsigned int total = skb->len;
2875         unsigned int offset = 0, size;
2876         int count = 0;
2877         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2878         unsigned int f;
2879         int i;
2880
2881         i = tx_ring->next_to_use;
2882
2883         len = min(skb_headlen(skb), total);
2884         while (len) {
2885                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2886                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2887
2888                 tx_buffer_info->length = size;
2889                 tx_buffer_info->mapped_as_page = false;
2890                 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2891                                                      skb->data + offset,
2892                                                      size, DMA_TO_DEVICE);
2893                 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2894                         goto dma_error;
2895
2896                 len -= size;
2897                 total -= size;
2898                 offset += size;
2899                 count++;
2900                 i++;
2901                 if (i == tx_ring->count)
2902                         i = 0;
2903         }
2904
2905         for (f = 0; f < nr_frags; f++) {
2906                 const struct skb_frag_struct *frag;
2907
2908                 frag = &skb_shinfo(skb)->frags[f];
2909                 len = min((unsigned int)skb_frag_size(frag), total);
2910                 offset = 0;
2911
2912                 while (len) {
2913                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2914                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2915
2916                         tx_buffer_info->length = size;
2917                         tx_buffer_info->dma =
2918                                 skb_frag_dma_map(tx_ring->dev, frag,
2919                                                  offset, size, DMA_TO_DEVICE);
2920                         if (dma_mapping_error(tx_ring->dev,
2921                                               tx_buffer_info->dma))
2922                                 goto dma_error;
2923                         tx_buffer_info->mapped_as_page = true;
2924
2925                         len -= size;
2926                         total -= size;
2927                         offset += size;
2928                         count++;
2929                         i++;
2930                         if (i == tx_ring->count)
2931                                 i = 0;
2932                 }
2933                 if (total == 0)
2934                         break;
2935         }
2936
2937         if (i == 0)
2938                 i = tx_ring->count - 1;
2939         else
2940                 i = i - 1;
2941         tx_ring->tx_buffer_info[i].skb = skb;
2942
2943         return count;
2944
2945 dma_error:
2946         dev_err(tx_ring->dev, "TX DMA map failed\n");
2947
2948         /* clear timestamp and dma mappings for failed tx_buffer_info map */
2949         tx_buffer_info->dma = 0;
2950         count--;
2951
2952         /* clear timestamp and dma mappings for remaining portion of packet */
2953         while (count >= 0) {
2954                 count--;
2955                 i--;
2956                 if (i < 0)
2957                         i += tx_ring->count;
2958                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2959                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2960         }
2961
2962         return count;
2963 }
2964
2965 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
2966                              int count, unsigned int first, u32 paylen,
2967                              u8 hdr_len)
2968 {
2969         union ixgbe_adv_tx_desc *tx_desc = NULL;
2970         struct ixgbevf_tx_buffer *tx_buffer_info;
2971         u32 olinfo_status = 0, cmd_type_len = 0;
2972         unsigned int i;
2973
2974         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2975
2976         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2977
2978         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2979
2980         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2981                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2982
2983         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2984                 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
2985
2986         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2987                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2988
2989                 /* use index 1 context for tso */
2990                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2991                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2992                         olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
2993         }
2994
2995         /*
2996          * Check Context must be set if Tx switch is enabled, which it
2997          * always is for case where virtual functions are running
2998          */
2999         olinfo_status |= IXGBE_ADVTXD_CC;
3000
3001         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3002
3003         i = tx_ring->next_to_use;
3004         while (count--) {
3005                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3006                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
3007                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3008                 tx_desc->read.cmd_type_len =
3009                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3010                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3011                 i++;
3012                 if (i == tx_ring->count)
3013                         i = 0;
3014         }
3015
3016         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3017
3018         tx_ring->tx_buffer_info[first].time_stamp = jiffies;
3019
3020         /* Force memory writes to complete before letting h/w
3021          * know there are new descriptors to fetch.  (Only
3022          * applicable for weak-ordered memory model archs,
3023          * such as IA-64).
3024          */
3025         wmb();
3026
3027         tx_ring->tx_buffer_info[first].next_to_watch = tx_desc;
3028         tx_ring->next_to_use = i;
3029 }
3030
3031 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3032 {
3033         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
3034
3035         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
3036         /* Herbert's original patch had:
3037          *  smp_mb__after_netif_stop_queue();
3038          * but since that doesn't exist yet, just open code it. */
3039         smp_mb();
3040
3041         /* We need to check again in a case another CPU has just
3042          * made room available. */
3043         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3044                 return -EBUSY;
3045
3046         /* A reprieve! - use start_queue because it doesn't call schedule */
3047         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
3048         ++adapter->restart_queue;
3049         return 0;
3050 }
3051
3052 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
3053 {
3054         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3055                 return 0;
3056         return __ixgbevf_maybe_stop_tx(tx_ring, size);
3057 }
3058
3059 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3060 {
3061         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3062         struct ixgbevf_ring *tx_ring;
3063         unsigned int first;
3064         unsigned int tx_flags = 0;
3065         u8 hdr_len = 0;
3066         int r_idx = 0, tso;
3067         u16 count = TXD_USE_COUNT(skb_headlen(skb));
3068 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3069         unsigned short f;
3070 #endif
3071         u8 *dst_mac = skb_header_pointer(skb, 0, 0, NULL);
3072         if (!dst_mac || is_link_local_ether_addr(dst_mac)) {
3073                 dev_kfree_skb(skb);
3074                 return NETDEV_TX_OK;
3075         }
3076
3077         tx_ring = &adapter->tx_ring[r_idx];
3078
3079         /*
3080          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
3081          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
3082          *       + 2 desc gap to keep tail from touching head,
3083          *       + 1 desc for context descriptor,
3084          * otherwise try next time
3085          */
3086 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
3087         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
3088                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3089 #else
3090         count += skb_shinfo(skb)->nr_frags;
3091 #endif
3092         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
3093                 adapter->tx_busy++;
3094                 return NETDEV_TX_BUSY;
3095         }
3096
3097         if (vlan_tx_tag_present(skb)) {
3098                 tx_flags |= vlan_tx_tag_get(skb);
3099                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
3100                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3101         }
3102
3103         first = tx_ring->next_to_use;
3104
3105         if (skb->protocol == htons(ETH_P_IP))
3106                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3107         tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
3108         if (tso < 0) {
3109                 dev_kfree_skb_any(skb);
3110                 return NETDEV_TX_OK;
3111         }
3112
3113         if (tso)
3114                 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
3115         else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
3116                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3117
3118         ixgbevf_tx_queue(tx_ring, tx_flags,
3119                          ixgbevf_tx_map(tx_ring, skb, tx_flags),
3120                          first, skb->len, hdr_len);
3121
3122         writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
3123
3124         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
3125
3126         return NETDEV_TX_OK;
3127 }
3128
3129 /**
3130  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
3131  * @netdev: network interface device structure
3132  * @p: pointer to an address structure
3133  *
3134  * Returns 0 on success, negative on failure
3135  **/
3136 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
3137 {
3138         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3139         struct ixgbe_hw *hw = &adapter->hw;
3140         struct sockaddr *addr = p;
3141
3142         if (!is_valid_ether_addr(addr->sa_data))
3143                 return -EADDRNOTAVAIL;
3144
3145         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3146         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
3147
3148         spin_lock_bh(&adapter->mbx_lock);
3149
3150         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
3151
3152         spin_unlock_bh(&adapter->mbx_lock);
3153
3154         return 0;
3155 }
3156
3157 /**
3158  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
3159  * @netdev: network interface device structure
3160  * @new_mtu: new value for maximum frame size
3161  *
3162  * Returns 0 on success, negative on failure
3163  **/
3164 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
3165 {
3166         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3167         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3168         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
3169
3170         switch (adapter->hw.api_version) {
3171         case ixgbe_mbox_api_11:
3172                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3173                 break;
3174         default:
3175                 if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
3176                         max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
3177                 break;
3178         }
3179
3180         /* MTU < 68 is an error and causes problems on some kernels */
3181         if ((new_mtu < 68) || (max_frame > max_possible_frame))
3182                 return -EINVAL;
3183
3184         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
3185                netdev->mtu, new_mtu);
3186         /* must set new MTU before calling down or up */
3187         netdev->mtu = new_mtu;
3188
3189         if (netif_running(netdev))
3190                 ixgbevf_reinit_locked(adapter);
3191
3192         return 0;
3193 }
3194
3195 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
3196 {
3197         struct net_device *netdev = pci_get_drvdata(pdev);
3198         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3199 #ifdef CONFIG_PM
3200         int retval = 0;
3201 #endif
3202
3203         netif_device_detach(netdev);
3204
3205         if (netif_running(netdev)) {
3206                 rtnl_lock();
3207                 ixgbevf_down(adapter);
3208                 ixgbevf_free_irq(adapter);
3209                 ixgbevf_free_all_tx_resources(adapter);
3210                 ixgbevf_free_all_rx_resources(adapter);
3211                 rtnl_unlock();
3212         }
3213
3214         ixgbevf_clear_interrupt_scheme(adapter);
3215
3216 #ifdef CONFIG_PM
3217         retval = pci_save_state(pdev);
3218         if (retval)
3219                 return retval;
3220
3221 #endif
3222         pci_disable_device(pdev);
3223
3224         return 0;
3225 }
3226
3227 #ifdef CONFIG_PM
3228 static int ixgbevf_resume(struct pci_dev *pdev)
3229 {
3230         struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
3231         struct net_device *netdev = adapter->netdev;
3232         u32 err;
3233
3234         pci_set_power_state(pdev, PCI_D0);
3235         pci_restore_state(pdev);
3236         /*
3237          * pci_restore_state clears dev->state_saved so call
3238          * pci_save_state to restore it.
3239          */
3240         pci_save_state(pdev);
3241
3242         err = pci_enable_device_mem(pdev);
3243         if (err) {
3244                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
3245                 return err;
3246         }
3247         pci_set_master(pdev);
3248
3249         ixgbevf_reset(adapter);
3250
3251         rtnl_lock();
3252         err = ixgbevf_init_interrupt_scheme(adapter);
3253         rtnl_unlock();
3254         if (err) {
3255                 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3256                 return err;
3257         }
3258
3259         if (netif_running(netdev)) {
3260                 err = ixgbevf_open(netdev);
3261                 if (err)
3262                         return err;
3263         }
3264
3265         netif_device_attach(netdev);
3266
3267         return err;
3268 }
3269
3270 #endif /* CONFIG_PM */
3271 static void ixgbevf_shutdown(struct pci_dev *pdev)
3272 {
3273         ixgbevf_suspend(pdev, PMSG_SUSPEND);
3274 }
3275
3276 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3277                                                 struct rtnl_link_stats64 *stats)
3278 {
3279         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3280         unsigned int start;
3281         u64 bytes, packets;
3282         const struct ixgbevf_ring *ring;
3283         int i;
3284
3285         ixgbevf_update_stats(adapter);
3286
3287         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3288
3289         for (i = 0; i < adapter->num_rx_queues; i++) {
3290                 ring = &adapter->rx_ring[i];
3291                 do {
3292                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3293                         bytes = ring->total_bytes;
3294                         packets = ring->total_packets;
3295                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3296                 stats->rx_bytes += bytes;
3297                 stats->rx_packets += packets;
3298         }
3299
3300         for (i = 0; i < adapter->num_tx_queues; i++) {
3301                 ring = &adapter->tx_ring[i];
3302                 do {
3303                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3304                         bytes = ring->total_bytes;
3305                         packets = ring->total_packets;
3306                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3307                 stats->tx_bytes += bytes;
3308                 stats->tx_packets += packets;
3309         }
3310
3311         return stats;
3312 }
3313
3314 static const struct net_device_ops ixgbevf_netdev_ops = {
3315         .ndo_open               = ixgbevf_open,
3316         .ndo_stop               = ixgbevf_close,
3317         .ndo_start_xmit         = ixgbevf_xmit_frame,
3318         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3319         .ndo_get_stats64        = ixgbevf_get_stats,
3320         .ndo_validate_addr      = eth_validate_addr,
3321         .ndo_set_mac_address    = ixgbevf_set_mac,
3322         .ndo_change_mtu         = ixgbevf_change_mtu,
3323         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3324         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3325         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3326 };
3327
3328 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3329 {
3330         dev->netdev_ops = &ixgbevf_netdev_ops;
3331         ixgbevf_set_ethtool_ops(dev);
3332         dev->watchdog_timeo = 5 * HZ;
3333 }
3334
3335 /**
3336  * ixgbevf_probe - Device Initialization Routine
3337  * @pdev: PCI device information struct
3338  * @ent: entry in ixgbevf_pci_tbl
3339  *
3340  * Returns 0 on success, negative on failure
3341  *
3342  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3343  * The OS initialization, configuring of the adapter private structure,
3344  * and a hardware reset occur.
3345  **/
3346 static int ixgbevf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3347 {
3348         struct net_device *netdev;
3349         struct ixgbevf_adapter *adapter = NULL;
3350         struct ixgbe_hw *hw = NULL;
3351         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3352         static int cards_found;
3353         int err, pci_using_dac;
3354
3355         err = pci_enable_device(pdev);
3356         if (err)
3357                 return err;
3358
3359         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3360             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3361                 pci_using_dac = 1;
3362         } else {
3363                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3364                 if (err) {
3365                         err = dma_set_coherent_mask(&pdev->dev,
3366                                                     DMA_BIT_MASK(32));
3367                         if (err) {
3368                                 dev_err(&pdev->dev, "No usable DMA "
3369                                         "configuration, aborting\n");
3370                                 goto err_dma;
3371                         }
3372                 }
3373                 pci_using_dac = 0;
3374         }
3375
3376         err = pci_request_regions(pdev, ixgbevf_driver_name);
3377         if (err) {
3378                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3379                 goto err_pci_reg;
3380         }
3381
3382         pci_set_master(pdev);
3383
3384         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3385                                    MAX_TX_QUEUES);
3386         if (!netdev) {
3387                 err = -ENOMEM;
3388                 goto err_alloc_etherdev;
3389         }
3390
3391         SET_NETDEV_DEV(netdev, &pdev->dev);
3392
3393         pci_set_drvdata(pdev, netdev);
3394         adapter = netdev_priv(netdev);
3395
3396         adapter->netdev = netdev;
3397         adapter->pdev = pdev;
3398         hw = &adapter->hw;
3399         hw->back = adapter;
3400         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3401
3402         /*
3403          * call save state here in standalone driver because it relies on
3404          * adapter struct to exist, and needs to call netdev_priv
3405          */
3406         pci_save_state(pdev);
3407
3408         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3409                               pci_resource_len(pdev, 0));
3410         if (!hw->hw_addr) {
3411                 err = -EIO;
3412                 goto err_ioremap;
3413         }
3414
3415         ixgbevf_assign_netdev_ops(netdev);
3416
3417         adapter->bd_number = cards_found;
3418
3419         /* Setup hw api */
3420         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3421         hw->mac.type  = ii->mac;
3422
3423         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3424                sizeof(struct ixgbe_mbx_operations));
3425
3426         /* setup the private structure */
3427         err = ixgbevf_sw_init(adapter);
3428         if (err)
3429                 goto err_sw_init;
3430
3431         /* The HW MAC address was set and/or determined in sw_init */
3432         if (!is_valid_ether_addr(netdev->dev_addr)) {
3433                 pr_err("invalid MAC address\n");
3434                 err = -EIO;
3435                 goto err_sw_init;
3436         }
3437
3438         netdev->hw_features = NETIF_F_SG |
3439                            NETIF_F_IP_CSUM |
3440                            NETIF_F_IPV6_CSUM |
3441                            NETIF_F_TSO |
3442                            NETIF_F_TSO6 |
3443                            NETIF_F_RXCSUM;
3444
3445         netdev->features = netdev->hw_features |
3446                            NETIF_F_HW_VLAN_CTAG_TX |
3447                            NETIF_F_HW_VLAN_CTAG_RX |
3448                            NETIF_F_HW_VLAN_CTAG_FILTER;
3449
3450         netdev->vlan_features |= NETIF_F_TSO;
3451         netdev->vlan_features |= NETIF_F_TSO6;
3452         netdev->vlan_features |= NETIF_F_IP_CSUM;
3453         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3454         netdev->vlan_features |= NETIF_F_SG;
3455
3456         if (pci_using_dac)
3457                 netdev->features |= NETIF_F_HIGHDMA;
3458
3459         netdev->priv_flags |= IFF_UNICAST_FLT;
3460
3461         init_timer(&adapter->watchdog_timer);
3462         adapter->watchdog_timer.function = ixgbevf_watchdog;
3463         adapter->watchdog_timer.data = (unsigned long)adapter;
3464
3465         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3466         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3467
3468         err = ixgbevf_init_interrupt_scheme(adapter);
3469         if (err)
3470                 goto err_sw_init;
3471
3472         strcpy(netdev->name, "eth%d");
3473
3474         err = register_netdev(netdev);
3475         if (err)
3476                 goto err_register;
3477
3478         netif_carrier_off(netdev);
3479
3480         ixgbevf_init_last_counter_stats(adapter);
3481
3482         /* print the MAC address */
3483         hw_dbg(hw, "%pM\n", netdev->dev_addr);
3484
3485         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3486
3487         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3488         cards_found++;
3489         return 0;
3490
3491 err_register:
3492         ixgbevf_clear_interrupt_scheme(adapter);
3493 err_sw_init:
3494         ixgbevf_reset_interrupt_capability(adapter);
3495         iounmap(hw->hw_addr);
3496 err_ioremap:
3497         free_netdev(netdev);
3498 err_alloc_etherdev:
3499         pci_release_regions(pdev);
3500 err_pci_reg:
3501 err_dma:
3502         pci_disable_device(pdev);
3503         return err;
3504 }
3505
3506 /**
3507  * ixgbevf_remove - Device Removal Routine
3508  * @pdev: PCI device information struct
3509  *
3510  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3511  * that it should release a PCI device.  The could be caused by a
3512  * Hot-Plug event, or because the driver is going to be removed from
3513  * memory.
3514  **/
3515 static void ixgbevf_remove(struct pci_dev *pdev)
3516 {
3517         struct net_device *netdev = pci_get_drvdata(pdev);
3518         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3519
3520         set_bit(__IXGBEVF_DOWN, &adapter->state);
3521
3522         del_timer_sync(&adapter->watchdog_timer);
3523
3524         cancel_work_sync(&adapter->reset_task);
3525         cancel_work_sync(&adapter->watchdog_task);
3526
3527         if (netdev->reg_state == NETREG_REGISTERED)
3528                 unregister_netdev(netdev);
3529
3530         ixgbevf_clear_interrupt_scheme(adapter);
3531         ixgbevf_reset_interrupt_capability(adapter);
3532
3533         iounmap(adapter->hw.hw_addr);
3534         pci_release_regions(pdev);
3535
3536         hw_dbg(&adapter->hw, "Remove complete\n");
3537
3538         kfree(adapter->tx_ring);
3539         kfree(adapter->rx_ring);
3540
3541         free_netdev(netdev);
3542
3543         pci_disable_device(pdev);
3544 }
3545
3546 /**
3547  * ixgbevf_io_error_detected - called when PCI error is detected
3548  * @pdev: Pointer to PCI device
3549  * @state: The current pci connection state
3550  *
3551  * This function is called after a PCI bus error affecting
3552  * this device has been detected.
3553  */
3554 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3555                                                   pci_channel_state_t state)
3556 {
3557         struct net_device *netdev = pci_get_drvdata(pdev);
3558         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3559
3560         netif_device_detach(netdev);
3561
3562         if (state == pci_channel_io_perm_failure)
3563                 return PCI_ERS_RESULT_DISCONNECT;
3564
3565         if (netif_running(netdev))
3566                 ixgbevf_down(adapter);
3567
3568         pci_disable_device(pdev);
3569
3570         /* Request a slot slot reset. */
3571         return PCI_ERS_RESULT_NEED_RESET;
3572 }
3573
3574 /**
3575  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3576  * @pdev: Pointer to PCI device
3577  *
3578  * Restart the card from scratch, as if from a cold-boot. Implementation
3579  * resembles the first-half of the ixgbevf_resume routine.
3580  */
3581 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3582 {
3583         struct net_device *netdev = pci_get_drvdata(pdev);
3584         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3585
3586         if (pci_enable_device_mem(pdev)) {
3587                 dev_err(&pdev->dev,
3588                         "Cannot re-enable PCI device after reset.\n");
3589                 return PCI_ERS_RESULT_DISCONNECT;
3590         }
3591
3592         pci_set_master(pdev);
3593
3594         ixgbevf_reset(adapter);
3595
3596         return PCI_ERS_RESULT_RECOVERED;
3597 }
3598
3599 /**
3600  * ixgbevf_io_resume - called when traffic can start flowing again.
3601  * @pdev: Pointer to PCI device
3602  *
3603  * This callback is called when the error recovery driver tells us that
3604  * its OK to resume normal operation. Implementation resembles the
3605  * second-half of the ixgbevf_resume routine.
3606  */
3607 static void ixgbevf_io_resume(struct pci_dev *pdev)
3608 {
3609         struct net_device *netdev = pci_get_drvdata(pdev);
3610         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3611
3612         if (netif_running(netdev))
3613                 ixgbevf_up(adapter);
3614
3615         netif_device_attach(netdev);
3616 }
3617
3618 /* PCI Error Recovery (ERS) */
3619 static const struct pci_error_handlers ixgbevf_err_handler = {
3620         .error_detected = ixgbevf_io_error_detected,
3621         .slot_reset = ixgbevf_io_slot_reset,
3622         .resume = ixgbevf_io_resume,
3623 };
3624
3625 static struct pci_driver ixgbevf_driver = {
3626         .name     = ixgbevf_driver_name,
3627         .id_table = ixgbevf_pci_tbl,
3628         .probe    = ixgbevf_probe,
3629         .remove   = ixgbevf_remove,
3630 #ifdef CONFIG_PM
3631         /* Power Management Hooks */
3632         .suspend  = ixgbevf_suspend,
3633         .resume   = ixgbevf_resume,
3634 #endif
3635         .shutdown = ixgbevf_shutdown,
3636         .err_handler = &ixgbevf_err_handler
3637 };
3638
3639 /**
3640  * ixgbevf_init_module - Driver Registration Routine
3641  *
3642  * ixgbevf_init_module is the first routine called when the driver is
3643  * loaded. All it does is register with the PCI subsystem.
3644  **/
3645 static int __init ixgbevf_init_module(void)
3646 {
3647         int ret;
3648         pr_info("%s - version %s\n", ixgbevf_driver_string,
3649                 ixgbevf_driver_version);
3650
3651         pr_info("%s\n", ixgbevf_copyright);
3652
3653         ret = pci_register_driver(&ixgbevf_driver);
3654         return ret;
3655 }
3656
3657 module_init(ixgbevf_init_module);
3658
3659 /**
3660  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3661  *
3662  * ixgbevf_exit_module is called just before the driver is removed
3663  * from memory.
3664  **/
3665 static void __exit ixgbevf_exit_module(void)
3666 {
3667         pci_unregister_driver(&ixgbevf_driver);
3668 }
3669
3670 #ifdef DEBUG
3671 /**
3672  * ixgbevf_get_hw_dev_name - return device name string
3673  * used by hardware layer to print debugging information
3674  **/
3675 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3676 {
3677         struct ixgbevf_adapter *adapter = hw->back;
3678         return adapter->netdev->name;
3679 }
3680
3681 #endif
3682 module_exit(ixgbevf_exit_module);
3683
3684 /* ixgbevf_main.c */