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