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 "2.6.0-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
 103 static inline void ixgbevf_release_rx_desc(struct ixgbe_hw *hw,
 104                                            struct ixgbevf_ring *rx_ring,
 105                                            u32 val)
 106 {
 107         /*
 108          * Force memory writes to complete before letting h/w
 109          * know there are new descriptors to fetch.  (Only
 110          * applicable for weak-ordered memory model archs,
 111          * such as IA-64).
 112          */
 113         wmb();
 114         IXGBE_WRITE_REG(hw, IXGBE_VFRDT(rx_ring->reg_idx), val);
 115 }
 116
 117 /**
 118  * ixgbevf_set_ivar - set IVAR registers - maps interrupt causes to vectors
 119  * @adapter: pointer to adapter struct
 120  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 121  * @queue: queue to map the corresponding interrupt to
 122  * @msix_vector: the vector to map to the corresponding queue
 123  *
 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
 267         return count < tx_ring->count;
 268 }
 269
 270 /**
 271  * ixgbevf_receive_skb - Send a completed packet up the stack
 272  * @q_vector: structure containing interrupt and ring information
 273  * @skb: packet to send up
 274  * @status: hardware indication of status of receive
 275  * @rx_ring: rx descriptor ring (for a specific queue) to setup
 276  * @rx_desc: rx descriptor
 277  **/
 278 static void ixgbevf_receive_skb(struct ixgbevf_q_vector *q_vector,
 279                                 struct sk_buff *skb, u8 status,
 280                                 struct ixgbevf_ring *ring,
 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         napi_gro_receive(&q_vector->napi, skb);
 291 }
 292
 293 /**
 294  * ixgbevf_rx_checksum - indicate in skb if hw indicated a good cksum
 295  * @adapter: address of board private structure
 296  * @status_err: hardware indication of status of receive
 297  * @skb: skb currently being received and modified
 298  **/
 299 static inline void ixgbevf_rx_checksum(struct ixgbevf_adapter *adapter,
 300                                        struct ixgbevf_ring *ring,
 301                                        u32 status_err, struct sk_buff *skb)
 302 {
 303         skb_checksum_none_assert(skb);
 304
 305         /* Rx csum disabled */
 306         if (!(ring->netdev->features & NETIF_F_RXCSUM))
 307                 return;
 308
 309         /* if IP and error */
 310         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 311             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 312                 adapter->hw_csum_rx_error++;
 313                 return;
 314         }
 315
 316         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 317                 return;
 318
 319         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 320                 adapter->hw_csum_rx_error++;
 321                 return;
 322         }
 323
 324         /* It must be a TCP or UDP packet with a valid checksum */
 325         skb->ip_summed = CHECKSUM_UNNECESSARY;
 326         adapter->hw_csum_rx_good++;
 327 }
 328
 329 /**
 330  * ixgbevf_alloc_rx_buffers - Replace used receive buffers; packet split
 331  * @adapter: address of board private structure
 332  **/
 333 static void ixgbevf_alloc_rx_buffers(struct ixgbevf_adapter *adapter,
 334                                      struct ixgbevf_ring *rx_ring,
 335                                      int cleaned_count)
 336 {
 337         struct pci_dev *pdev = adapter->pdev;
 338         union ixgbe_adv_rx_desc *rx_desc;
 339         struct ixgbevf_rx_buffer *bi;
 340         struct sk_buff *skb;
 341         unsigned int i = rx_ring->next_to_use;
 342
 343         bi = &rx_ring->rx_buffer_info[i];
 344
 345         while (cleaned_count--) {
 346                 rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 347                 skb = bi->skb;
 348                 if (!skb) {
 349                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 350                                                         rx_ring->rx_buf_len);
 351                         if (!skb) {
 352                                 adapter->alloc_rx_buff_failed++;
 353                                 goto no_buffers;
 354                         }
 355                         bi->skb = skb;
 356                 }
 357                 if (!bi->dma) {
 358                         bi->dma = dma_map_single(&pdev->dev, skb->data,
 359                                                  rx_ring->rx_buf_len,
 360                                                  DMA_FROM_DEVICE);
 361                 }
 362                 rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
 363
 364                 i++;
 365                 if (i == rx_ring->count)
 366                         i = 0;
 367                 bi = &rx_ring->rx_buffer_info[i];
 368         }
 369
 370 no_buffers:
 371         if (rx_ring->next_to_use != i) {
 372                 rx_ring->next_to_use = i;
 373
 374                 ixgbevf_release_rx_desc(&adapter->hw, rx_ring, i);
 375         }
 376 }
 377
 378 static inline void ixgbevf_irq_enable_queues(struct ixgbevf_adapter *adapter,
 379                                              u32 qmask)
 380 {
 381         struct ixgbe_hw *hw = &adapter->hw;
 382
 383         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, qmask);
 384 }
 385
 386 static bool ixgbevf_clean_rx_irq(struct ixgbevf_q_vector *q_vector,
 387                                  struct ixgbevf_ring *rx_ring,
 388                                  int budget)
 389 {
 390         struct ixgbevf_adapter *adapter = q_vector->adapter;
 391         struct pci_dev *pdev = adapter->pdev;
 392         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 393         struct ixgbevf_rx_buffer *rx_buffer_info, *next_buffer;
 394         struct sk_buff *skb;
 395         unsigned int i;
 396         u32 len, staterr;
 397         int cleaned_count = 0;
 398         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 399
 400         i = rx_ring->next_to_clean;
 401         rx_desc = IXGBEVF_RX_DESC(rx_ring, i);
 402         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 403         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 404
 405         while (staterr & IXGBE_RXD_STAT_DD) {
 406                 if (!budget)
 407                         break;
 408                 budget--;
 409
 410                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 411                 len = le16_to_cpu(rx_desc->wb.upper.length);
 412                 skb = rx_buffer_info->skb;
 413                 prefetch(skb->data - NET_IP_ALIGN);
 414                 rx_buffer_info->skb = NULL;
 415
 416                 if (rx_buffer_info->dma) {
 417                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
 418                                          rx_ring->rx_buf_len,
 419                                          DMA_FROM_DEVICE);
 420                         rx_buffer_info->dma = 0;
 421                         skb_put(skb, len);
 422                 }
 423
 424                 i++;
 425                 if (i == rx_ring->count)
 426                         i = 0;
 427
 428                 next_rxd = IXGBEVF_RX_DESC(rx_ring, i);
 429                 prefetch(next_rxd);
 430                 cleaned_count++;
 431
 432                 next_buffer = &rx_ring->rx_buffer_info[i];
 433
 434                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
 435                         skb->next = next_buffer->skb;
 436                         skb->next->prev = skb;
 437                         adapter->non_eop_descs++;
 438                         goto next_desc;
 439                 }
 440
 441                 /* ERR_MASK will only have valid bits if EOP set */
 442                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
 443                         dev_kfree_skb_irq(skb);
 444                         goto next_desc;
 445                 }
 446
 447                 ixgbevf_rx_checksum(adapter, rx_ring, staterr, skb);
 448
 449                 /* probably a little skewed due to removing CRC */
 450                 total_rx_bytes += skb->len;
 451                 total_rx_packets++;
 452
 453                 /*
 454                  * Work around issue of some types of VM to VM loop back
 455                  * packets not getting split correctly
 456                  */
 457                 if (staterr & IXGBE_RXD_STAT_LB) {
 458                         u32 header_fixup_len = skb_headlen(skb);
 459                         if (header_fixup_len < 14)
 460                                 skb_push(skb, header_fixup_len);
 461                 }
 462                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 463
 464                 ixgbevf_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
 465
 466 next_desc:
 467                 rx_desc->wb.upper.status_error = 0;
 468
 469                 /* return some buffers to hardware, one at a time is too slow */
 470                 if (cleaned_count >= IXGBEVF_RX_BUFFER_WRITE) {
 471                         ixgbevf_alloc_rx_buffers(adapter, rx_ring,
 472                                                  cleaned_count);
 473                         cleaned_count = 0;
 474                 }
 475
 476                 /* use prefetched values */
 477                 rx_desc = next_rxd;
 478                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 479
 480                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 481         }
 482
 483         rx_ring->next_to_clean = i;
 484         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 485
 486         if (cleaned_count)
 487                 ixgbevf_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 488
 489         u64_stats_update_begin(&rx_ring->syncp);
 490         rx_ring->total_packets += total_rx_packets;
 491         rx_ring->total_bytes += total_rx_bytes;
 492         u64_stats_update_end(&rx_ring->syncp);
 493
 494         return !!budget;
 495 }
 496
 497 /**
 498  * ixgbevf_poll - NAPI polling calback
 499  * @napi: napi struct with our devices info in it
 500  * @budget: amount of work driver is allowed to do this pass, in packets
 501  *
 502  * This function will clean more than one or more rings associated with a
 503  * q_vector.
 504  **/
 505 static int ixgbevf_poll(struct napi_struct *napi, int budget)
 506 {
 507         struct ixgbevf_q_vector *q_vector =
 508                 container_of(napi, struct ixgbevf_q_vector, napi);
 509         struct ixgbevf_adapter *adapter = q_vector->adapter;
 510         struct ixgbevf_ring *ring;
 511         int per_ring_budget;
 512         bool clean_complete = true;
 513
 514         ixgbevf_for_each_ring(ring, q_vector->tx)
 515                 clean_complete &= ixgbevf_clean_tx_irq(q_vector, ring);
 516
 517         /* attempt to distribute budget to each queue fairly, but don't allow
 518          * the budget to go below 1 because we'll exit polling */
 519         if (q_vector->rx.count > 1)
 520                 per_ring_budget = max(budget/q_vector->rx.count, 1);
 521         else
 522                 per_ring_budget = budget;
 523
 524         ixgbevf_for_each_ring(ring, q_vector->rx)
 525                 clean_complete &= ixgbevf_clean_rx_irq(q_vector, ring,
 526                                                        per_ring_budget);
 527
 528         /* If all work not completed, return budget and keep polling */
 529         if (!clean_complete)
 530                 return budget;
 531         /* all work done, exit the polling mode */
 532         napi_complete(napi);
 533         if (adapter->rx_itr_setting & 1)
 534                 ixgbevf_set_itr(q_vector);
 535         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
 536                 ixgbevf_irq_enable_queues(adapter,
 537                                           1 << q_vector->v_idx);
 538
 539         return 0;
 540 }
 541
 542 /**
 543  * ixgbevf_write_eitr - write VTEITR register in hardware specific way
 544  * @q_vector: structure containing interrupt and ring information
 545  */
 546 static void ixgbevf_write_eitr(struct ixgbevf_q_vector *q_vector)
 547 {
 548         struct ixgbevf_adapter *adapter = q_vector->adapter;
 549         struct ixgbe_hw *hw = &adapter->hw;
 550         int v_idx = q_vector->v_idx;
 551         u32 itr_reg = q_vector->itr & IXGBE_MAX_EITR;
 552
 553         /*
 554          * set the WDIS bit to not clear the timer bits and cause an
 555          * immediate assertion of the interrupt
 556          */
 557         itr_reg |= IXGBE_EITR_CNT_WDIS;
 558
 559         IXGBE_WRITE_REG(hw, IXGBE_VTEITR(v_idx), itr_reg);
 560 }
 561
 562 /**
 563  * ixgbevf_configure_msix - Configure MSI-X hardware
 564  * @adapter: board private structure
 565  *
 566  * ixgbevf_configure_msix sets up the hardware to properly generate MSI-X
 567  * interrupts.
 568  **/
 569 static void ixgbevf_configure_msix(struct ixgbevf_adapter *adapter)
 570 {
 571         struct ixgbevf_q_vector *q_vector;
 572         int q_vectors, v_idx;
 573
 574         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 575         adapter->eims_enable_mask = 0;
 576
 577         /*
 578          * Populate the IVAR table and set the ITR values to the
 579          * corresponding register.
 580          */
 581         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 582                 struct ixgbevf_ring *ring;
 583                 q_vector = adapter->q_vector[v_idx];
 584
 585                 ixgbevf_for_each_ring(ring, q_vector->rx)
 586                         ixgbevf_set_ivar(adapter, 0, ring->reg_idx, v_idx);
 587
 588                 ixgbevf_for_each_ring(ring, q_vector->tx)
 589                         ixgbevf_set_ivar(adapter, 1, ring->reg_idx, v_idx);
 590
 591                 if (q_vector->tx.ring && !q_vector->rx.ring) {
 592                         /* tx only vector */
 593                         if (adapter->tx_itr_setting == 1)
 594                                 q_vector->itr = IXGBE_10K_ITR;
 595                         else
 596                                 q_vector->itr = adapter->tx_itr_setting;
 597                 } else {
 598                         /* rx or rx/tx vector */
 599                         if (adapter->rx_itr_setting == 1)
 600                                 q_vector->itr = IXGBE_20K_ITR;
 601                         else
 602                                 q_vector->itr = adapter->rx_itr_setting;
 603                 }
 604
 605                 /* add q_vector eims value to global eims_enable_mask */
 606                 adapter->eims_enable_mask |= 1 << v_idx;
 607
 608                 ixgbevf_write_eitr(q_vector);
 609         }
 610
 611         ixgbevf_set_ivar(adapter, -1, 1, v_idx);
 612         /* setup eims_other and add value to global eims_enable_mask */
 613         adapter->eims_other = 1 << v_idx;
 614         adapter->eims_enable_mask |= adapter->eims_other;
 615 }
 616
 617 enum latency_range {
 618         lowest_latency = 0,
 619         low_latency = 1,
 620         bulk_latency = 2,
 621         latency_invalid = 255
 622 };
 623
 624 /**
 625  * ixgbevf_update_itr - update the dynamic ITR value based on statistics
 626  * @q_vector: structure containing interrupt and ring information
 627  * @ring_container: structure containing ring performance data
 628  *
 629  *      Stores a new ITR value based on packets and byte
 630  *      counts during the last interrupt.  The advantage of per interrupt
 631  *      computation is faster updates and more accurate ITR for the current
 632  *      traffic pattern.  Constants in this function were computed
 633  *      based on theoretical maximum wire speed and thresholds were set based
 634  *      on testing data as well as attempting to minimize response time
 635  *      while increasing bulk throughput.
 636  **/
 637 static void ixgbevf_update_itr(struct ixgbevf_q_vector *q_vector,
 638                                struct ixgbevf_ring_container *ring_container)
 639 {
 640         int bytes = ring_container->total_bytes;
 641         int packets = ring_container->total_packets;
 642         u32 timepassed_us;
 643         u64 bytes_perint;
 644         u8 itr_setting = ring_container->itr;
 645
 646         if (packets == 0)
 647                 return;
 648
 649         /* simple throttlerate management
 650          *    0-20MB/s lowest (100000 ints/s)
 651          *   20-100MB/s low   (20000 ints/s)
 652          *  100-1249MB/s bulk (8000 ints/s)
 653          */
 654         /* what was last interrupt timeslice? */
 655         timepassed_us = q_vector->itr >> 2;
 656         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 657
 658         switch (itr_setting) {
 659         case lowest_latency:
 660                 if (bytes_perint > 10)
 661                         itr_setting = low_latency;
 662                 break;
 663         case low_latency:
 664                 if (bytes_perint > 20)
 665                         itr_setting = bulk_latency;
 666                 else if (bytes_perint <= 10)
 667                         itr_setting = lowest_latency;
 668                 break;
 669         case bulk_latency:
 670                 if (bytes_perint <= 20)
 671                         itr_setting = low_latency;
 672                 break;
 673         }
 674
 675         /* clear work counters since we have the values we need */
 676         ring_container->total_bytes = 0;
 677         ring_container->total_packets = 0;
 678
 679         /* write updated itr to ring container */
 680         ring_container->itr = itr_setting;
 681 }
 682
 683 static void ixgbevf_set_itr(struct ixgbevf_q_vector *q_vector)
 684 {
 685         u32 new_itr = q_vector->itr;
 686         u8 current_itr;
 687
 688         ixgbevf_update_itr(q_vector, &q_vector->tx);
 689         ixgbevf_update_itr(q_vector, &q_vector->rx);
 690
 691         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
 692
 693         switch (current_itr) {
 694         /* counts and packets in update_itr are dependent on these numbers */
 695         case lowest_latency:
 696                 new_itr = IXGBE_100K_ITR;
 697                 break;
 698         case low_latency:
 699                 new_itr = IXGBE_20K_ITR;
 700                 break;
 701         case bulk_latency:
 702         default:
 703                 new_itr = IXGBE_8K_ITR;
 704                 break;
 705         }
 706
 707         if (new_itr != q_vector->itr) {
 708                 /* do an exponential smoothing */
 709                 new_itr = (10 * new_itr * q_vector->itr) /
 710                           ((9 * new_itr) + q_vector->itr);
 711
 712                 /* save the algorithm value here */
 713                 q_vector->itr = new_itr;
 714
 715                 ixgbevf_write_eitr(q_vector);
 716         }
 717 }
 718
 719 static irqreturn_t ixgbevf_msix_mbx(int irq, void *data)
 720 {
 721         struct ixgbevf_adapter *adapter = data;
 722         struct ixgbe_hw *hw = &adapter->hw;
 723         u32 msg;
 724         bool got_ack = false;
 725
 726         if (!hw->mbx.ops.check_for_ack(hw))
 727                 got_ack = true;
 728
 729         if (!hw->mbx.ops.check_for_msg(hw)) {
 730                 hw->mbx.ops.read(hw, &msg, 1);
 731
 732                 if ((msg & IXGBE_MBVFICR_VFREQ_MASK) == IXGBE_PF_CONTROL_MSG)
 733                         mod_timer(&adapter->watchdog_timer,
 734                                   round_jiffies(jiffies + 1));
 735
 736                 if (msg & IXGBE_VT_MSGTYPE_NACK)
 737                         pr_warn("Last Request of type %2.2x to PF Nacked\n",
 738                                 msg & 0xFF);
 739                 /*
 740                  * Restore the PFSTS bit in case someone is polling for a
 741                  * return message from the PF
 742                  */
 743                 hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFSTS;
 744         }
 745
 746         /*
 747          * checking for the ack clears the PFACK bit.  Place
 748          * it back in the v2p_mailbox cache so that anyone
 749          * polling for an ack will not miss it
 750          */
 751         if (got_ack)
 752                 hw->mbx.v2p_mailbox |= IXGBE_VFMAILBOX_PFACK;
 753
 754         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_other);
 755
 756         return IRQ_HANDLED;
 757 }
 758
 759
 760 /**
 761  * ixgbevf_msix_clean_rings - single unshared vector rx clean (all queues)
 762  * @irq: unused
 763  * @data: pointer to our q_vector struct for this interrupt vector
 764  **/
 765 static irqreturn_t ixgbevf_msix_clean_rings(int irq, void *data)
 766 {
 767         struct ixgbevf_q_vector *q_vector = data;
 768
 769         /* EIAM disabled interrupts (on this vector) for us */
 770         if (q_vector->rx.ring || q_vector->tx.ring)
 771                 napi_schedule(&q_vector->napi);
 772
 773         return IRQ_HANDLED;
 774 }
 775
 776 static inline void map_vector_to_rxq(struct ixgbevf_adapter *a, int v_idx,
 777                                      int r_idx)
 778 {
 779         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 780
 781         a->rx_ring[r_idx].next = q_vector->rx.ring;
 782         q_vector->rx.ring = &a->rx_ring[r_idx];
 783         q_vector->rx.count++;
 784 }
 785
 786 static inline void map_vector_to_txq(struct ixgbevf_adapter *a, int v_idx,
 787                                      int t_idx)
 788 {
 789         struct ixgbevf_q_vector *q_vector = a->q_vector[v_idx];
 790
 791         a->tx_ring[t_idx].next = q_vector->tx.ring;
 792         q_vector->tx.ring = &a->tx_ring[t_idx];
 793         q_vector->tx.count++;
 794 }
 795
 796 /**
 797  * ixgbevf_map_rings_to_vectors - Maps descriptor rings to vectors
 798  * @adapter: board private structure to initialize
 799  *
 800  * This function maps descriptor rings to the queue-specific vectors
 801  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 802  * one vector per ring/queue, but on a constrained vector budget, we
 803  * group the rings as "efficiently" as possible.  You would add new
 804  * mapping configurations in here.
 805  **/
 806 static int ixgbevf_map_rings_to_vectors(struct ixgbevf_adapter *adapter)
 807 {
 808         int q_vectors;
 809         int v_start = 0;
 810         int rxr_idx = 0, txr_idx = 0;
 811         int rxr_remaining = adapter->num_rx_queues;
 812         int txr_remaining = adapter->num_tx_queues;
 813         int i, j;
 814         int rqpv, tqpv;
 815         int err = 0;
 816
 817         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 818
 819         /*
 820          * The ideal configuration...
 821          * We have enough vectors to map one per queue.
 822          */
 823         if (q_vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
 824                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 825                         map_vector_to_rxq(adapter, v_start, rxr_idx);
 826
 827                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 828                         map_vector_to_txq(adapter, v_start, txr_idx);
 829                 goto out;
 830         }
 831
 832         /*
 833          * If we don't have enough vectors for a 1-to-1
 834          * mapping, we'll have to group them so there are
 835          * multiple queues per vector.
 836          */
 837         /* Re-adjusting *qpv takes care of the remainder. */
 838         for (i = v_start; i < q_vectors; i++) {
 839                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 840                 for (j = 0; j < rqpv; j++) {
 841                         map_vector_to_rxq(adapter, i, rxr_idx);
 842                         rxr_idx++;
 843                         rxr_remaining--;
 844                 }
 845         }
 846         for (i = v_start; i < q_vectors; i++) {
 847                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 848                 for (j = 0; j < tqpv; j++) {
 849                         map_vector_to_txq(adapter, i, txr_idx);
 850                         txr_idx++;
 851                         txr_remaining--;
 852                 }
 853         }
 854
 855 out:
 856         return err;
 857 }
 858
 859 /**
 860  * ixgbevf_request_msix_irqs - Initialize MSI-X interrupts
 861  * @adapter: board private structure
 862  *
 863  * ixgbevf_request_msix_irqs allocates MSI-X vectors and requests
 864  * interrupts from the kernel.
 865  **/
 866 static int ixgbevf_request_msix_irqs(struct ixgbevf_adapter *adapter)
 867 {
 868         struct net_device *netdev = adapter->netdev;
 869         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 870         int vector, err;
 871         int ri = 0, ti = 0;
 872
 873         for (vector = 0; vector < q_vectors; vector++) {
 874                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[vector];
 875                 struct msix_entry *entry = &adapter->msix_entries[vector];
 876
 877                 if (q_vector->tx.ring && q_vector->rx.ring) {
 878                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 879                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
 880                         ti++;
 881                 } else if (q_vector->rx.ring) {
 882                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 883                                  "%s-%s-%d", netdev->name, "rx", ri++);
 884                 } else if (q_vector->tx.ring) {
 885                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 886                                  "%s-%s-%d", netdev->name, "tx", ti++);
 887                 } else {
 888                         /* skip this unused q_vector */
 889                         continue;
 890                 }
 891                 err = request_irq(entry->vector, &ixgbevf_msix_clean_rings, 0,
 892                                   q_vector->name, q_vector);
 893                 if (err) {
 894                         hw_dbg(&adapter->hw,
 895                                "request_irq failed for MSIX interrupt "
 896                                "Error: %d\n", err);
 897                         goto free_queue_irqs;
 898                 }
 899         }
 900
 901         err = request_irq(adapter->msix_entries[vector].vector,
 902                           &ixgbevf_msix_mbx, 0, netdev->name, adapter);
 903         if (err) {
 904                 hw_dbg(&adapter->hw,
 905                        "request_irq for msix_mbx failed: %d\n", err);
 906                 goto free_queue_irqs;
 907         }
 908
 909         return 0;
 910
 911 free_queue_irqs:
 912         while (vector) {
 913                 vector--;
 914                 free_irq(adapter->msix_entries[vector].vector,
 915                          adapter->q_vector[vector]);
 916         }
 917         pci_disable_msix(adapter->pdev);
 918         kfree(adapter->msix_entries);
 919         adapter->msix_entries = NULL;
 920         return err;
 921 }
 922
 923 static inline void ixgbevf_reset_q_vectors(struct ixgbevf_adapter *adapter)
 924 {
 925         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 926
 927         for (i = 0; i < q_vectors; i++) {
 928                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[i];
 929                 q_vector->rx.ring = NULL;
 930                 q_vector->tx.ring = NULL;
 931                 q_vector->rx.count = 0;
 932                 q_vector->tx.count = 0;
 933         }
 934 }
 935
 936 /**
 937  * ixgbevf_request_irq - initialize interrupts
 938  * @adapter: board private structure
 939  *
 940  * Attempts to configure interrupts using the best available
 941  * capabilities of the hardware and kernel.
 942  **/
 943 static int ixgbevf_request_irq(struct ixgbevf_adapter *adapter)
 944 {
 945         int err = 0;
 946
 947         err = ixgbevf_request_msix_irqs(adapter);
 948
 949         if (err)
 950                 hw_dbg(&adapter->hw,
 951                        "request_irq failed, Error %d\n", err);
 952
 953         return err;
 954 }
 955
 956 static void ixgbevf_free_irq(struct ixgbevf_adapter *adapter)
 957 {
 958         int i, q_vectors;
 959
 960         q_vectors = adapter->num_msix_vectors;
 961         i = q_vectors - 1;
 962
 963         free_irq(adapter->msix_entries[i].vector, adapter);
 964         i--;
 965
 966         for (; i >= 0; i--) {
 967                 /* free only the irqs that were actually requested */
 968                 if (!adapter->q_vector[i]->rx.ring &&
 969                     !adapter->q_vector[i]->tx.ring)
 970                         continue;
 971
 972                 free_irq(adapter->msix_entries[i].vector,
 973                          adapter->q_vector[i]);
 974         }
 975
 976         ixgbevf_reset_q_vectors(adapter);
 977 }
 978
 979 /**
 980  * ixgbevf_irq_disable - Mask off interrupt generation on the NIC
 981  * @adapter: board private structure
 982  **/
 983 static inline void ixgbevf_irq_disable(struct ixgbevf_adapter *adapter)
 984 {
 985         struct ixgbe_hw *hw = &adapter->hw;
 986         int i;
 987
 988         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, 0);
 989         IXGBE_WRITE_REG(hw, IXGBE_VTEIMC, ~0);
 990         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, 0);
 991
 992         IXGBE_WRITE_FLUSH(hw);
 993
 994         for (i = 0; i < adapter->num_msix_vectors; i++)
 995                 synchronize_irq(adapter->msix_entries[i].vector);
 996 }
 997
 998 /**
 999  * ixgbevf_irq_enable - Enable default interrupt generation settings
1000  * @adapter: board private structure
1001  **/
1002 static inline void ixgbevf_irq_enable(struct ixgbevf_adapter *adapter)
1003 {
1004         struct ixgbe_hw *hw = &adapter->hw;
1005
1006         IXGBE_WRITE_REG(hw, IXGBE_VTEIAM, adapter->eims_enable_mask);
1007         IXGBE_WRITE_REG(hw, IXGBE_VTEIAC, adapter->eims_enable_mask);
1008         IXGBE_WRITE_REG(hw, IXGBE_VTEIMS, adapter->eims_enable_mask);
1009 }
1010
1011 /**
1012  * ixgbevf_configure_tx - Configure 82599 VF Transmit Unit after Reset
1013  * @adapter: board private structure
1014  *
1015  * Configure the Tx unit of the MAC after a reset.
1016  **/
1017 static void ixgbevf_configure_tx(struct ixgbevf_adapter *adapter)
1018 {
1019         u64 tdba;
1020         struct ixgbe_hw *hw = &adapter->hw;
1021         u32 i, j, tdlen, txctrl;
1022
1023         /* Setup the HW Tx Head and Tail descriptor pointers */
1024         for (i = 0; i < adapter->num_tx_queues; i++) {
1025                 struct ixgbevf_ring *ring = &adapter->tx_ring[i];
1026                 j = ring->reg_idx;
1027                 tdba = ring->dma;
1028                 tdlen = ring->count * sizeof(union ixgbe_adv_tx_desc);
1029                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAL(j),
1030                                 (tdba & DMA_BIT_MASK(32)));
1031                 IXGBE_WRITE_REG(hw, IXGBE_VFTDBAH(j), (tdba >> 32));
1032                 IXGBE_WRITE_REG(hw, IXGBE_VFTDLEN(j), tdlen);
1033                 IXGBE_WRITE_REG(hw, IXGBE_VFTDH(j), 0);
1034                 IXGBE_WRITE_REG(hw, IXGBE_VFTDT(j), 0);
1035                 adapter->tx_ring[i].head = IXGBE_VFTDH(j);
1036                 adapter->tx_ring[i].tail = IXGBE_VFTDT(j);
1037                 /* Disable Tx Head Writeback RO bit, since this hoses
1038                  * bookkeeping if things aren't delivered in order.
1039                  */
1040                 txctrl = IXGBE_READ_REG(hw, IXGBE_VFDCA_TXCTRL(j));
1041                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1042                 IXGBE_WRITE_REG(hw, IXGBE_VFDCA_TXCTRL(j), txctrl);
1043         }
1044 }
1045
1046 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
1047
1048 static void ixgbevf_configure_srrctl(struct ixgbevf_adapter *adapter, int index)
1049 {
1050         struct ixgbevf_ring *rx_ring;
1051         struct ixgbe_hw *hw = &adapter->hw;
1052         u32 srrctl;
1053
1054         rx_ring = &adapter->rx_ring[index];
1055
1056         srrctl = IXGBE_SRRCTL_DROP_EN;
1057
1058         srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1059
1060         srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
1061                   IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1062
1063         IXGBE_WRITE_REG(hw, IXGBE_VFSRRCTL(index), srrctl);
1064 }
1065
1066 static void ixgbevf_set_rx_buffer_len(struct ixgbevf_adapter *adapter)
1067 {
1068         struct ixgbe_hw *hw = &adapter->hw;
1069         struct net_device *netdev = adapter->netdev;
1070         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1071         int i;
1072         u16 rx_buf_len;
1073
1074         /* notify the PF of our intent to use this size of frame */
1075         ixgbevf_rlpml_set_vf(hw, max_frame);
1076
1077         /* PF will allow an extra 4 bytes past for vlan tagged frames */
1078         max_frame += VLAN_HLEN;
1079
1080         /*
1081          * Make best use of allocation by using all but 1K of a
1082          * power of 2 allocation that will be used for skb->head.
1083          */
1084         if ((hw->mac.type == ixgbe_mac_X540_vf) &&
1085             (max_frame <= MAXIMUM_ETHERNET_VLAN_SIZE))
1086                 rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1087         else if (max_frame <= IXGBEVF_RXBUFFER_3K)
1088                 rx_buf_len = IXGBEVF_RXBUFFER_3K;
1089         else if (max_frame <= IXGBEVF_RXBUFFER_7K)
1090                 rx_buf_len = IXGBEVF_RXBUFFER_7K;
1091         else if (max_frame <= IXGBEVF_RXBUFFER_15K)
1092                 rx_buf_len = IXGBEVF_RXBUFFER_15K;
1093         else
1094                 rx_buf_len = IXGBEVF_MAX_RXBUFFER;
1095
1096         for (i = 0; i < adapter->num_rx_queues; i++)
1097                 adapter->rx_ring[i].rx_buf_len = rx_buf_len;
1098 }
1099
1100 /**
1101  * ixgbevf_configure_rx - Configure 82599 VF Receive Unit after Reset
1102  * @adapter: board private structure
1103  *
1104  * Configure the Rx unit of the MAC after a reset.
1105  **/
1106 static void ixgbevf_configure_rx(struct ixgbevf_adapter *adapter)
1107 {
1108         u64 rdba;
1109         struct ixgbe_hw *hw = &adapter->hw;
1110         int i, j;
1111         u32 rdlen;
1112
1113         /* PSRTYPE must be initialized in 82599 */
1114         IXGBE_WRITE_REG(hw, IXGBE_VFPSRTYPE, 0);
1115
1116         /* set_rx_buffer_len must be called before ring initialization */
1117         ixgbevf_set_rx_buffer_len(adapter);
1118
1119         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1120         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1121          * the Base and Length of the Rx Descriptor Ring */
1122         for (i = 0; i < adapter->num_rx_queues; i++) {
1123                 rdba = adapter->rx_ring[i].dma;
1124                 j = adapter->rx_ring[i].reg_idx;
1125                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAL(j),
1126                                 (rdba & DMA_BIT_MASK(32)));
1127                 IXGBE_WRITE_REG(hw, IXGBE_VFRDBAH(j), (rdba >> 32));
1128                 IXGBE_WRITE_REG(hw, IXGBE_VFRDLEN(j), rdlen);
1129                 IXGBE_WRITE_REG(hw, IXGBE_VFRDH(j), 0);
1130                 IXGBE_WRITE_REG(hw, IXGBE_VFRDT(j), 0);
1131                 adapter->rx_ring[i].head = IXGBE_VFRDH(j);
1132                 adapter->rx_ring[i].tail = IXGBE_VFRDT(j);
1133
1134                 ixgbevf_configure_srrctl(adapter, j);
1135         }
1136 }
1137
1138 static int ixgbevf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1139 {
1140         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1141         struct ixgbe_hw *hw = &adapter->hw;
1142
1143         spin_lock(&adapter->mbx_lock);
1144
1145         /* add VID to filter table */
1146         if (hw->mac.ops.set_vfta)
1147                 hw->mac.ops.set_vfta(hw, vid, 0, true);
1148
1149         spin_unlock(&adapter->mbx_lock);
1150
1151         set_bit(vid, adapter->active_vlans);
1152
1153         return 0;
1154 }
1155
1156 static int ixgbevf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1157 {
1158         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1159         struct ixgbe_hw *hw = &adapter->hw;
1160
1161         spin_lock(&adapter->mbx_lock);
1162
1163         /* remove VID from filter table */
1164         if (hw->mac.ops.set_vfta)
1165                 hw->mac.ops.set_vfta(hw, vid, 0, false);
1166
1167         spin_unlock(&adapter->mbx_lock);
1168
1169         clear_bit(vid, adapter->active_vlans);
1170
1171         return 0;
1172 }
1173
1174 static void ixgbevf_restore_vlan(struct ixgbevf_adapter *adapter)
1175 {
1176         u16 vid;
1177
1178         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1179                 ixgbevf_vlan_rx_add_vid(adapter->netdev, vid);
1180 }
1181
1182 static int ixgbevf_write_uc_addr_list(struct net_device *netdev)
1183 {
1184         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1185         struct ixgbe_hw *hw = &adapter->hw;
1186         int count = 0;
1187
1188         if ((netdev_uc_count(netdev)) > 10) {
1189                 pr_err("Too many unicast filters - No Space\n");
1190                 return -ENOSPC;
1191         }
1192
1193         if (!netdev_uc_empty(netdev)) {
1194                 struct netdev_hw_addr *ha;
1195                 netdev_for_each_uc_addr(ha, netdev) {
1196                         hw->mac.ops.set_uc_addr(hw, ++count, ha->addr);
1197                         udelay(200);
1198                 }
1199         } else {
1200                 /*
1201                  * If the list is empty then send message to PF driver to
1202                  * clear all macvlans on this VF.
1203                  */
1204                 hw->mac.ops.set_uc_addr(hw, 0, NULL);
1205         }
1206
1207         return count;
1208 }
1209
1210 /**
1211  * ixgbevf_set_rx_mode - Multicast set
1212  * @netdev: network interface device structure
1213  *
1214  * The set_rx_method entry point is called whenever the multicast address
1215  * list or the network interface flags are updated.  This routine is
1216  * responsible for configuring the hardware for proper multicast mode.
1217  **/
1218 static void ixgbevf_set_rx_mode(struct net_device *netdev)
1219 {
1220         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
1221         struct ixgbe_hw *hw = &adapter->hw;
1222
1223         spin_lock(&adapter->mbx_lock);
1224
1225         /* reprogram multicast list */
1226         if (hw->mac.ops.update_mc_addr_list)
1227                 hw->mac.ops.update_mc_addr_list(hw, netdev);
1228
1229         ixgbevf_write_uc_addr_list(netdev);
1230
1231         spin_unlock(&adapter->mbx_lock);
1232 }
1233
1234 static void ixgbevf_napi_enable_all(struct ixgbevf_adapter *adapter)
1235 {
1236         int q_idx;
1237         struct ixgbevf_q_vector *q_vector;
1238         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1239
1240         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1241                 q_vector = adapter->q_vector[q_idx];
1242                 napi_enable(&q_vector->napi);
1243         }
1244 }
1245
1246 static void ixgbevf_napi_disable_all(struct ixgbevf_adapter *adapter)
1247 {
1248         int q_idx;
1249         struct ixgbevf_q_vector *q_vector;
1250         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1251
1252         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1253                 q_vector = adapter->q_vector[q_idx];
1254                 napi_disable(&q_vector->napi);
1255         }
1256 }
1257
1258 static void ixgbevf_configure(struct ixgbevf_adapter *adapter)
1259 {
1260         struct net_device *netdev = adapter->netdev;
1261         int i;
1262
1263         ixgbevf_set_rx_mode(netdev);
1264
1265         ixgbevf_restore_vlan(adapter);
1266
1267         ixgbevf_configure_tx(adapter);
1268         ixgbevf_configure_rx(adapter);
1269         for (i = 0; i < adapter->num_rx_queues; i++) {
1270                 struct ixgbevf_ring *ring = &adapter->rx_ring[i];
1271                 ixgbevf_alloc_rx_buffers(adapter, ring,
1272                                          IXGBE_DESC_UNUSED(ring));
1273         }
1274 }
1275
1276 #define IXGBE_MAX_RX_DESC_POLL 10
1277 static inline void ixgbevf_rx_desc_queue_enable(struct ixgbevf_adapter *adapter,
1278                                                 int rxr)
1279 {
1280         struct ixgbe_hw *hw = &adapter->hw;
1281         int j = adapter->rx_ring[rxr].reg_idx;
1282         int k;
1283
1284         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
1285                 if (IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
1286                         break;
1287                 else
1288                         msleep(1);
1289         }
1290         if (k >= IXGBE_MAX_RX_DESC_POLL) {
1291                 hw_dbg(hw, "RXDCTL.ENABLE on Rx queue %d "
1292                        "not set within the polling period\n", rxr);
1293         }
1294
1295         ixgbevf_release_rx_desc(&adapter->hw, &adapter->rx_ring[rxr],
1296                                 (adapter->rx_ring[rxr].count - 1));
1297 }
1298
1299 static void ixgbevf_save_reset_stats(struct ixgbevf_adapter *adapter)
1300 {
1301         /* Only save pre-reset stats if there are some */
1302         if (adapter->stats.vfgprc || adapter->stats.vfgptc) {
1303                 adapter->stats.saved_reset_vfgprc += adapter->stats.vfgprc -
1304                         adapter->stats.base_vfgprc;
1305                 adapter->stats.saved_reset_vfgptc += adapter->stats.vfgptc -
1306                         adapter->stats.base_vfgptc;
1307                 adapter->stats.saved_reset_vfgorc += adapter->stats.vfgorc -
1308                         adapter->stats.base_vfgorc;
1309                 adapter->stats.saved_reset_vfgotc += adapter->stats.vfgotc -
1310                         adapter->stats.base_vfgotc;
1311                 adapter->stats.saved_reset_vfmprc += adapter->stats.vfmprc -
1312                         adapter->stats.base_vfmprc;
1313         }
1314 }
1315
1316 static void ixgbevf_init_last_counter_stats(struct ixgbevf_adapter *adapter)
1317 {
1318         struct ixgbe_hw *hw = &adapter->hw;
1319
1320         adapter->stats.last_vfgprc = IXGBE_READ_REG(hw, IXGBE_VFGPRC);
1321         adapter->stats.last_vfgorc = IXGBE_READ_REG(hw, IXGBE_VFGORC_LSB);
1322         adapter->stats.last_vfgorc |=
1323                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGORC_MSB))) << 32);
1324         adapter->stats.last_vfgptc = IXGBE_READ_REG(hw, IXGBE_VFGPTC);
1325         adapter->stats.last_vfgotc = IXGBE_READ_REG(hw, IXGBE_VFGOTC_LSB);
1326         adapter->stats.last_vfgotc |=
1327                 (((u64)(IXGBE_READ_REG(hw, IXGBE_VFGOTC_MSB))) << 32);
1328         adapter->stats.last_vfmprc = IXGBE_READ_REG(hw, IXGBE_VFMPRC);
1329
1330         adapter->stats.base_vfgprc = adapter->stats.last_vfgprc;
1331         adapter->stats.base_vfgorc = adapter->stats.last_vfgorc;
1332         adapter->stats.base_vfgptc = adapter->stats.last_vfgptc;
1333         adapter->stats.base_vfgotc = adapter->stats.last_vfgotc;
1334         adapter->stats.base_vfmprc = adapter->stats.last_vfmprc;
1335 }
1336
1337 static void ixgbevf_negotiate_api(struct ixgbevf_adapter *adapter)
1338 {
1339         struct ixgbe_hw *hw = &adapter->hw;
1340         int api[] = { ixgbe_mbox_api_10,
1341                       ixgbe_mbox_api_unknown };
1342         int err = 0, idx = 0;
1343
1344         spin_lock(&adapter->mbx_lock);
1345
1346         while (api[idx] != ixgbe_mbox_api_unknown) {
1347                 err = ixgbevf_negotiate_api_version(hw, api[idx]);
1348                 if (!err)
1349                         break;
1350                 idx++;
1351         }
1352
1353         spin_unlock(&adapter->mbx_lock);
1354 }
1355
1356 static void ixgbevf_up_complete(struct ixgbevf_adapter *adapter)
1357 {
1358         struct net_device *netdev = adapter->netdev;
1359         struct ixgbe_hw *hw = &adapter->hw;
1360         int i, j = 0;
1361         int num_rx_rings = adapter->num_rx_queues;
1362         u32 txdctl, rxdctl;
1363
1364         for (i = 0; i < adapter->num_tx_queues; i++) {
1365                 j = adapter->tx_ring[i].reg_idx;
1366                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1367                 /* enable WTHRESH=8 descriptors, to encourage burst writeback */
1368                 txdctl |= (8 << 16);
1369                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1370         }
1371
1372         for (i = 0; i < adapter->num_tx_queues; i++) {
1373                 j = adapter->tx_ring[i].reg_idx;
1374                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1375                 txdctl |= IXGBE_TXDCTL_ENABLE;
1376                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j), txdctl);
1377         }
1378
1379         for (i = 0; i < num_rx_rings; i++) {
1380                 j = adapter->rx_ring[i].reg_idx;
1381                 rxdctl = IXGBE_READ_REG(hw, IXGBE_VFRXDCTL(j));
1382                 rxdctl |= IXGBE_RXDCTL_ENABLE | IXGBE_RXDCTL_VME;
1383                 if (hw->mac.type == ixgbe_mac_X540_vf) {
1384                         rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
1385                         rxdctl |= ((netdev->mtu + ETH_HLEN + ETH_FCS_LEN) |
1386                                    IXGBE_RXDCTL_RLPML_EN);
1387                 }
1388                 IXGBE_WRITE_REG(hw, IXGBE_VFRXDCTL(j), rxdctl);
1389                 ixgbevf_rx_desc_queue_enable(adapter, i);
1390         }
1391
1392         ixgbevf_configure_msix(adapter);
1393
1394         spin_lock(&adapter->mbx_lock);
1395
1396         if (hw->mac.ops.set_rar) {
1397                 if (is_valid_ether_addr(hw->mac.addr))
1398                         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
1399                 else
1400                         hw->mac.ops.set_rar(hw, 0, hw->mac.perm_addr, 0);
1401         }
1402
1403         spin_unlock(&adapter->mbx_lock);
1404
1405         clear_bit(__IXGBEVF_DOWN, &adapter->state);
1406         ixgbevf_napi_enable_all(adapter);
1407
1408         /* enable transmits */
1409         netif_tx_start_all_queues(netdev);
1410
1411         ixgbevf_save_reset_stats(adapter);
1412         ixgbevf_init_last_counter_stats(adapter);
1413
1414         mod_timer(&adapter->watchdog_timer, jiffies);
1415 }
1416
1417 void ixgbevf_up(struct ixgbevf_adapter *adapter)
1418 {
1419         struct ixgbe_hw *hw = &adapter->hw;
1420
1421         ixgbevf_negotiate_api(adapter);
1422
1423         ixgbevf_configure(adapter);
1424
1425         ixgbevf_up_complete(adapter);
1426
1427         /* clear any pending interrupts, may auto mask */
1428         IXGBE_READ_REG(hw, IXGBE_VTEICR);
1429
1430         ixgbevf_irq_enable(adapter);
1431 }
1432
1433 /**
1434  * ixgbevf_clean_rx_ring - Free Rx Buffers per Queue
1435  * @adapter: board private structure
1436  * @rx_ring: ring to free buffers from
1437  **/
1438 static void ixgbevf_clean_rx_ring(struct ixgbevf_adapter *adapter,
1439                                   struct ixgbevf_ring *rx_ring)
1440 {
1441         struct pci_dev *pdev = adapter->pdev;
1442         unsigned long size;
1443         unsigned int i;
1444
1445         if (!rx_ring->rx_buffer_info)
1446                 return;
1447
1448         /* Free all the Rx ring sk_buffs */
1449         for (i = 0; i < rx_ring->count; i++) {
1450                 struct ixgbevf_rx_buffer *rx_buffer_info;
1451
1452                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1453                 if (rx_buffer_info->dma) {
1454                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
1455                                          rx_ring->rx_buf_len,
1456                                          DMA_FROM_DEVICE);
1457                         rx_buffer_info->dma = 0;
1458                 }
1459                 if (rx_buffer_info->skb) {
1460                         struct sk_buff *skb = rx_buffer_info->skb;
1461                         rx_buffer_info->skb = NULL;
1462                         do {
1463                                 struct sk_buff *this = skb;
1464                                 skb = skb->prev;
1465                                 dev_kfree_skb(this);
1466                         } while (skb);
1467                 }
1468         }
1469
1470         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
1471         memset(rx_ring->rx_buffer_info, 0, size);
1472
1473         /* Zero out the descriptor ring */
1474         memset(rx_ring->desc, 0, rx_ring->size);
1475
1476         rx_ring->next_to_clean = 0;
1477         rx_ring->next_to_use = 0;
1478
1479         if (rx_ring->head)
1480                 writel(0, adapter->hw.hw_addr + rx_ring->head);
1481         if (rx_ring->tail)
1482                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
1483 }
1484
1485 /**
1486  * ixgbevf_clean_tx_ring - Free Tx Buffers
1487  * @adapter: board private structure
1488  * @tx_ring: ring to be cleaned
1489  **/
1490 static void ixgbevf_clean_tx_ring(struct ixgbevf_adapter *adapter,
1491                                   struct ixgbevf_ring *tx_ring)
1492 {
1493         struct ixgbevf_tx_buffer *tx_buffer_info;
1494         unsigned long size;
1495         unsigned int i;
1496
1497         if (!tx_ring->tx_buffer_info)
1498                 return;
1499
1500         /* Free all the Tx ring sk_buffs */
1501
1502         for (i = 0; i < tx_ring->count; i++) {
1503                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1504                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
1505         }
1506
1507         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
1508         memset(tx_ring->tx_buffer_info, 0, size);
1509
1510         memset(tx_ring->desc, 0, tx_ring->size);
1511
1512         tx_ring->next_to_use = 0;
1513         tx_ring->next_to_clean = 0;
1514
1515         if (tx_ring->head)
1516                 writel(0, adapter->hw.hw_addr + tx_ring->head);
1517         if (tx_ring->tail)
1518                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
1519 }
1520
1521 /**
1522  * ixgbevf_clean_all_rx_rings - Free Rx Buffers for all queues
1523  * @adapter: board private structure
1524  **/
1525 static void ixgbevf_clean_all_rx_rings(struct ixgbevf_adapter *adapter)
1526 {
1527         int i;
1528
1529         for (i = 0; i < adapter->num_rx_queues; i++)
1530                 ixgbevf_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1531 }
1532
1533 /**
1534  * ixgbevf_clean_all_tx_rings - Free Tx Buffers for all queues
1535  * @adapter: board private structure
1536  **/
1537 static void ixgbevf_clean_all_tx_rings(struct ixgbevf_adapter *adapter)
1538 {
1539         int i;
1540
1541         for (i = 0; i < adapter->num_tx_queues; i++)
1542                 ixgbevf_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1543 }
1544
1545 void ixgbevf_down(struct ixgbevf_adapter *adapter)
1546 {
1547         struct net_device *netdev = adapter->netdev;
1548         struct ixgbe_hw *hw = &adapter->hw;
1549         u32 txdctl;
1550         int i, j;
1551
1552         /* signal that we are down to the interrupt handler */
1553         set_bit(__IXGBEVF_DOWN, &adapter->state);
1554         /* disable receives */
1555
1556         netif_tx_disable(netdev);
1557
1558         msleep(10);
1559
1560         netif_tx_stop_all_queues(netdev);
1561
1562         ixgbevf_irq_disable(adapter);
1563
1564         ixgbevf_napi_disable_all(adapter);
1565
1566         del_timer_sync(&adapter->watchdog_timer);
1567         /* can't call flush scheduled work here because it can deadlock
1568          * if linkwatch_event tries to acquire the rtnl_lock which we are
1569          * holding */
1570         while (adapter->flags & IXGBE_FLAG_IN_WATCHDOG_TASK)
1571                 msleep(1);
1572
1573         /* disable transmits in the hardware now that interrupts are off */
1574         for (i = 0; i < adapter->num_tx_queues; i++) {
1575                 j = adapter->tx_ring[i].reg_idx;
1576                 txdctl = IXGBE_READ_REG(hw, IXGBE_VFTXDCTL(j));
1577                 IXGBE_WRITE_REG(hw, IXGBE_VFTXDCTL(j),
1578                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
1579         }
1580
1581         netif_carrier_off(netdev);
1582
1583         if (!pci_channel_offline(adapter->pdev))
1584                 ixgbevf_reset(adapter);
1585
1586         ixgbevf_clean_all_tx_rings(adapter);
1587         ixgbevf_clean_all_rx_rings(adapter);
1588 }
1589
1590 void ixgbevf_reinit_locked(struct ixgbevf_adapter *adapter)
1591 {
1592         struct ixgbe_hw *hw = &adapter->hw;
1593
1594         WARN_ON(in_interrupt());
1595
1596         while (test_and_set_bit(__IXGBEVF_RESETTING, &adapter->state))
1597                 msleep(1);
1598
1599         /*
1600          * Check if PF is up before re-init.  If not then skip until
1601          * later when the PF is up and ready to service requests from
1602          * the VF via mailbox.  If the VF is up and running then the
1603          * watchdog task will continue to schedule reset tasks until
1604          * the PF is up and running.
1605          */
1606         if (!hw->mac.ops.reset_hw(hw)) {
1607                 ixgbevf_down(adapter);
1608                 ixgbevf_up(adapter);
1609         }
1610
1611         clear_bit(__IXGBEVF_RESETTING, &adapter->state);
1612 }
1613
1614 void ixgbevf_reset(struct ixgbevf_adapter *adapter)
1615 {
1616         struct ixgbe_hw *hw = &adapter->hw;
1617         struct net_device *netdev = adapter->netdev;
1618
1619         spin_lock(&adapter->mbx_lock);
1620
1621         if (hw->mac.ops.reset_hw(hw))
1622                 hw_dbg(hw, "PF still resetting\n");
1623         else
1624                 hw->mac.ops.init_hw(hw);
1625
1626         spin_unlock(&adapter->mbx_lock);
1627
1628         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1629                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1630                        netdev->addr_len);
1631                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1632                        netdev->addr_len);
1633         }
1634 }
1635
1636 static void ixgbevf_acquire_msix_vectors(struct ixgbevf_adapter *adapter,
1637                                          int vectors)
1638 {
1639         int err, vector_threshold;
1640
1641         /* We'll want at least 2 (vector_threshold):
1642          * 1) TxQ[0] + RxQ[0] handler
1643          * 2) Other (Link Status Change, etc.)
1644          */
1645         vector_threshold = MIN_MSIX_COUNT;
1646
1647         /* The more we get, the more we will assign to Tx/Rx Cleanup
1648          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1649          * Right now, we simply care about how many we'll get; we'll
1650          * set them up later while requesting irq's.
1651          */
1652         while (vectors >= vector_threshold) {
1653                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1654                                       vectors);
1655                 if (!err) /* Success in acquiring all requested vectors. */
1656                         break;
1657                 else if (err < 0)
1658                         vectors = 0; /* Nasty failure, quit now */
1659                 else /* err == number of vectors we should try again with */
1660                         vectors = err;
1661         }
1662
1663         if (vectors < vector_threshold) {
1664                 /* Can't allocate enough MSI-X interrupts?  Oh well.
1665                  * This just means we'll go with either a single MSI
1666                  * vector or fall back to legacy interrupts.
1667                  */
1668                 hw_dbg(&adapter->hw,
1669                        "Unable to allocate MSI-X interrupts\n");
1670                 kfree(adapter->msix_entries);
1671                 adapter->msix_entries = NULL;
1672         } else {
1673                 /*
1674                  * Adjust for only the vectors we'll use, which is minimum
1675                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
1676                  * vectors we were allocated.
1677                  */
1678                 adapter->num_msix_vectors = vectors;
1679         }
1680 }
1681
1682 /**
1683  * ixgbevf_set_num_queues - Allocate queues for device, feature dependent
1684  * @adapter: board private structure to initialize
1685  *
1686  * This is the top level queue allocation routine.  The order here is very
1687  * important, starting with the "most" number of features turned on at once,
1688  * and ending with the smallest set of features.  This way large combinations
1689  * can be allocated if they're turned on, and smaller combinations are the
1690  * fallthrough conditions.
1691  *
1692  **/
1693 static void ixgbevf_set_num_queues(struct ixgbevf_adapter *adapter)
1694 {
1695         /* Start with base case */
1696         adapter->num_rx_queues = 1;
1697         adapter->num_tx_queues = 1;
1698 }
1699
1700 /**
1701  * ixgbevf_alloc_queues - Allocate memory for all rings
1702  * @adapter: board private structure to initialize
1703  *
1704  * We allocate one ring per queue at run-time since we don't know the
1705  * number of queues at compile-time.  The polling_netdev array is
1706  * intended for Multiqueue, but should work fine with a single queue.
1707  **/
1708 static int ixgbevf_alloc_queues(struct ixgbevf_adapter *adapter)
1709 {
1710         int i;
1711
1712         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
1713                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1714         if (!adapter->tx_ring)
1715                 goto err_tx_ring_allocation;
1716
1717         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
1718                                    sizeof(struct ixgbevf_ring), GFP_KERNEL);
1719         if (!adapter->rx_ring)
1720                 goto err_rx_ring_allocation;
1721
1722         for (i = 0; i < adapter->num_tx_queues; i++) {
1723                 adapter->tx_ring[i].count = adapter->tx_ring_count;
1724                 adapter->tx_ring[i].queue_index = i;
1725                 adapter->tx_ring[i].reg_idx = i;
1726                 adapter->tx_ring[i].dev = &adapter->pdev->dev;
1727                 adapter->tx_ring[i].netdev = adapter->netdev;
1728         }
1729
1730         for (i = 0; i < adapter->num_rx_queues; i++) {
1731                 adapter->rx_ring[i].count = adapter->rx_ring_count;
1732                 adapter->rx_ring[i].queue_index = i;
1733                 adapter->rx_ring[i].reg_idx = i;
1734                 adapter->rx_ring[i].dev = &adapter->pdev->dev;
1735                 adapter->rx_ring[i].netdev = adapter->netdev;
1736         }
1737
1738         return 0;
1739
1740 err_rx_ring_allocation:
1741         kfree(adapter->tx_ring);
1742 err_tx_ring_allocation:
1743         return -ENOMEM;
1744 }
1745
1746 /**
1747  * ixgbevf_set_interrupt_capability - set MSI-X or FAIL if not supported
1748  * @adapter: board private structure to initialize
1749  *
1750  * Attempt to configure the interrupts using the best available
1751  * capabilities of the hardware and the kernel.
1752  **/
1753 static int ixgbevf_set_interrupt_capability(struct ixgbevf_adapter *adapter)
1754 {
1755         int err = 0;
1756         int vector, v_budget;
1757
1758         /*
1759          * It's easy to be greedy for MSI-X vectors, but it really
1760          * doesn't do us much good if we have a lot more vectors
1761          * than CPU's.  So let's be conservative and only ask for
1762          * (roughly) the same number of vectors as there are CPU's.
1763          * The default is to use pairs of vectors.
1764          */
1765         v_budget = max(adapter->num_rx_queues, adapter->num_tx_queues);
1766         v_budget = min_t(int, v_budget, num_online_cpus());
1767         v_budget += NON_Q_VECTORS;
1768
1769         /* A failure in MSI-X entry allocation isn't fatal, but it does
1770          * mean we disable MSI-X capabilities of the adapter. */
1771         adapter->msix_entries = kcalloc(v_budget,
1772                                         sizeof(struct msix_entry), GFP_KERNEL);
1773         if (!adapter->msix_entries) {
1774                 err = -ENOMEM;
1775                 goto out;
1776         }
1777
1778         for (vector = 0; vector < v_budget; vector++)
1779                 adapter->msix_entries[vector].entry = vector;
1780
1781         ixgbevf_acquire_msix_vectors(adapter, v_budget);
1782
1783 out:
1784         return err;
1785 }
1786
1787 /**
1788  * ixgbevf_alloc_q_vectors - Allocate memory for interrupt vectors
1789  * @adapter: board private structure to initialize
1790  *
1791  * We allocate one q_vector per queue interrupt.  If allocation fails we
1792  * return -ENOMEM.
1793  **/
1794 static int ixgbevf_alloc_q_vectors(struct ixgbevf_adapter *adapter)
1795 {
1796         int q_idx, num_q_vectors;
1797         struct ixgbevf_q_vector *q_vector;
1798
1799         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1800
1801         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1802                 q_vector = kzalloc(sizeof(struct ixgbevf_q_vector), GFP_KERNEL);
1803                 if (!q_vector)
1804                         goto err_out;
1805                 q_vector->adapter = adapter;
1806                 q_vector->v_idx = q_idx;
1807                 netif_napi_add(adapter->netdev, &q_vector->napi,
1808                                ixgbevf_poll, 64);
1809                 adapter->q_vector[q_idx] = q_vector;
1810         }
1811
1812         return 0;
1813
1814 err_out:
1815         while (q_idx) {
1816                 q_idx--;
1817                 q_vector = adapter->q_vector[q_idx];
1818                 netif_napi_del(&q_vector->napi);
1819                 kfree(q_vector);
1820                 adapter->q_vector[q_idx] = NULL;
1821         }
1822         return -ENOMEM;
1823 }
1824
1825 /**
1826  * ixgbevf_free_q_vectors - Free memory allocated for interrupt vectors
1827  * @adapter: board private structure to initialize
1828  *
1829  * This function frees the memory allocated to the q_vectors.  In addition if
1830  * NAPI is enabled it will delete any references to the NAPI struct prior
1831  * to freeing the q_vector.
1832  **/
1833 static void ixgbevf_free_q_vectors(struct ixgbevf_adapter *adapter)
1834 {
1835         int q_idx, num_q_vectors;
1836         int napi_vectors;
1837
1838         num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1839         napi_vectors = adapter->num_rx_queues;
1840
1841         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1842                 struct ixgbevf_q_vector *q_vector = adapter->q_vector[q_idx];
1843
1844                 adapter->q_vector[q_idx] = NULL;
1845                 if (q_idx < napi_vectors)
1846                         netif_napi_del(&q_vector->napi);
1847                 kfree(q_vector);
1848         }
1849 }
1850
1851 /**
1852  * ixgbevf_reset_interrupt_capability - Reset MSIX setup
1853  * @adapter: board private structure
1854  *
1855  **/
1856 static void ixgbevf_reset_interrupt_capability(struct ixgbevf_adapter *adapter)
1857 {
1858         pci_disable_msix(adapter->pdev);
1859         kfree(adapter->msix_entries);
1860         adapter->msix_entries = NULL;
1861 }
1862
1863 /**
1864  * ixgbevf_init_interrupt_scheme - Determine if MSIX is supported and init
1865  * @adapter: board private structure to initialize
1866  *
1867  **/
1868 static int ixgbevf_init_interrupt_scheme(struct ixgbevf_adapter *adapter)
1869 {
1870         int err;
1871
1872         /* Number of supported queues */
1873         ixgbevf_set_num_queues(adapter);
1874
1875         err = ixgbevf_set_interrupt_capability(adapter);
1876         if (err) {
1877                 hw_dbg(&adapter->hw,
1878                        "Unable to setup interrupt capabilities\n");
1879                 goto err_set_interrupt;
1880         }
1881
1882         err = ixgbevf_alloc_q_vectors(adapter);
1883         if (err) {
1884                 hw_dbg(&adapter->hw, "Unable to allocate memory for queue "
1885                        "vectors\n");
1886                 goto err_alloc_q_vectors;
1887         }
1888
1889         err = ixgbevf_alloc_queues(adapter);
1890         if (err) {
1891                 pr_err("Unable to allocate memory for queues\n");
1892                 goto err_alloc_queues;
1893         }
1894
1895         hw_dbg(&adapter->hw, "Multiqueue %s: Rx Queue count = %u, "
1896                "Tx Queue count = %u\n",
1897                (adapter->num_rx_queues > 1) ? "Enabled" :
1898                "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
1899
1900         set_bit(__IXGBEVF_DOWN, &adapter->state);
1901
1902         return 0;
1903 err_alloc_queues:
1904         ixgbevf_free_q_vectors(adapter);
1905 err_alloc_q_vectors:
1906         ixgbevf_reset_interrupt_capability(adapter);
1907 err_set_interrupt:
1908         return err;
1909 }
1910
1911 /**
1912  * ixgbevf_clear_interrupt_scheme - Clear the current interrupt scheme settings
1913  * @adapter: board private structure to clear interrupt scheme on
1914  *
1915  * We go through and clear interrupt specific resources and reset the structure
1916  * to pre-load conditions
1917  **/
1918 static void ixgbevf_clear_interrupt_scheme(struct ixgbevf_adapter *adapter)
1919 {
1920         adapter->num_tx_queues = 0;
1921         adapter->num_rx_queues = 0;
1922
1923         ixgbevf_free_q_vectors(adapter);
1924         ixgbevf_reset_interrupt_capability(adapter);
1925 }
1926
1927 /**
1928  * ixgbevf_sw_init - Initialize general software structures
1929  * (struct ixgbevf_adapter)
1930  * @adapter: board private structure to initialize
1931  *
1932  * ixgbevf_sw_init initializes the Adapter private data structure.
1933  * Fields are initialized based on PCI device information and
1934  * OS network device settings (MTU size).
1935  **/
1936 static int __devinit ixgbevf_sw_init(struct ixgbevf_adapter *adapter)
1937 {
1938         struct ixgbe_hw *hw = &adapter->hw;
1939         struct pci_dev *pdev = adapter->pdev;
1940         int err;
1941
1942         /* PCI config space info */
1943
1944         hw->vendor_id = pdev->vendor;
1945         hw->device_id = pdev->device;
1946         hw->revision_id = pdev->revision;
1947         hw->subsystem_vendor_id = pdev->subsystem_vendor;
1948         hw->subsystem_device_id = pdev->subsystem_device;
1949
1950         hw->mbx.ops.init_params(hw);
1951         hw->mac.max_tx_queues = MAX_TX_QUEUES;
1952         hw->mac.max_rx_queues = MAX_RX_QUEUES;
1953         err = hw->mac.ops.reset_hw(hw);
1954         if (err) {
1955                 dev_info(&pdev->dev,
1956                          "PF still in reset state, assigning new address\n");
1957                 eth_hw_addr_random(adapter->netdev);
1958                 memcpy(adapter->hw.mac.addr, adapter->netdev->dev_addr,
1959                         adapter->netdev->addr_len);
1960         } else {
1961                 err = hw->mac.ops.init_hw(hw);
1962                 if (err) {
1963                         pr_err("init_shared_code failed: %d\n", err);
1964                         goto out;
1965                 }
1966                 memcpy(adapter->netdev->dev_addr, adapter->hw.mac.addr,
1967                         adapter->netdev->addr_len);
1968         }
1969
1970         /* lock to protect mailbox accesses */
1971         spin_lock_init(&adapter->mbx_lock);
1972
1973         /* Enable dynamic interrupt throttling rates */
1974         adapter->rx_itr_setting = 1;
1975         adapter->tx_itr_setting = 1;
1976
1977         /* set default ring sizes */
1978         adapter->tx_ring_count = IXGBEVF_DEFAULT_TXD;
1979         adapter->rx_ring_count = IXGBEVF_DEFAULT_RXD;
1980
1981         set_bit(__IXGBEVF_DOWN, &adapter->state);
1982         return 0;
1983
1984 out:
1985         return err;
1986 }
1987
1988 #define UPDATE_VF_COUNTER_32bit(reg, last_counter, counter)     \
1989         {                                                       \
1990                 u32 current_counter = IXGBE_READ_REG(hw, reg);  \
1991                 if (current_counter < last_counter)             \
1992                         counter += 0x100000000LL;               \
1993                 last_counter = current_counter;                 \
1994                 counter &= 0xFFFFFFFF00000000LL;                \
1995                 counter |= current_counter;                     \
1996         }
1997
1998 #define UPDATE_VF_COUNTER_36bit(reg_lsb, reg_msb, last_counter, counter) \
1999         {                                                                \
2000                 u64 current_counter_lsb = IXGBE_READ_REG(hw, reg_lsb);   \
2001                 u64 current_counter_msb = IXGBE_READ_REG(hw, reg_msb);   \
2002                 u64 current_counter = (current_counter_msb << 32) |      \
2003                         current_counter_lsb;                             \
2004                 if (current_counter < last_counter)                      \
2005                         counter += 0x1000000000LL;                       \
2006                 last_counter = current_counter;                          \
2007                 counter &= 0xFFFFFFF000000000LL;                         \
2008                 counter |= current_counter;                              \
2009         }
2010 /**
2011  * ixgbevf_update_stats - Update the board statistics counters.
2012  * @adapter: board private structure
2013  **/
2014 void ixgbevf_update_stats(struct ixgbevf_adapter *adapter)
2015 {
2016         struct ixgbe_hw *hw = &adapter->hw;
2017
2018         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPRC, adapter->stats.last_vfgprc,
2019                                 adapter->stats.vfgprc);
2020         UPDATE_VF_COUNTER_32bit(IXGBE_VFGPTC, adapter->stats.last_vfgptc,
2021                                 adapter->stats.vfgptc);
2022         UPDATE_VF_COUNTER_36bit(IXGBE_VFGORC_LSB, IXGBE_VFGORC_MSB,
2023                                 adapter->stats.last_vfgorc,
2024                                 adapter->stats.vfgorc);
2025         UPDATE_VF_COUNTER_36bit(IXGBE_VFGOTC_LSB, IXGBE_VFGOTC_MSB,
2026                                 adapter->stats.last_vfgotc,
2027                                 adapter->stats.vfgotc);
2028         UPDATE_VF_COUNTER_32bit(IXGBE_VFMPRC, adapter->stats.last_vfmprc,
2029                                 adapter->stats.vfmprc);
2030 }
2031
2032 /**
2033  * ixgbevf_watchdog - Timer Call-back
2034  * @data: pointer to adapter cast into an unsigned long
2035  **/
2036 static void ixgbevf_watchdog(unsigned long data)
2037 {
2038         struct ixgbevf_adapter *adapter = (struct ixgbevf_adapter *)data;
2039         struct ixgbe_hw *hw = &adapter->hw;
2040         u32 eics = 0;
2041         int i;
2042
2043         /*
2044          * Do the watchdog outside of interrupt context due to the lovely
2045          * delays that some of the newer hardware requires
2046          */
2047
2048         if (test_bit(__IXGBEVF_DOWN, &adapter->state))
2049                 goto watchdog_short_circuit;
2050
2051         /* get one bit for every active tx/rx interrupt vector */
2052         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
2053                 struct ixgbevf_q_vector *qv = adapter->q_vector[i];
2054                 if (qv->rx.ring || qv->tx.ring)
2055                         eics |= 1 << i;
2056         }
2057
2058         IXGBE_WRITE_REG(hw, IXGBE_VTEICS, eics);
2059
2060 watchdog_short_circuit:
2061         schedule_work(&adapter->watchdog_task);
2062 }
2063
2064 /**
2065  * ixgbevf_tx_timeout - Respond to a Tx Hang
2066  * @netdev: network interface device structure
2067  **/
2068 static void ixgbevf_tx_timeout(struct net_device *netdev)
2069 {
2070         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2071
2072         /* Do the reset outside of interrupt context */
2073         schedule_work(&adapter->reset_task);
2074 }
2075
2076 static void ixgbevf_reset_task(struct work_struct *work)
2077 {
2078         struct ixgbevf_adapter *adapter;
2079         adapter = container_of(work, struct ixgbevf_adapter, reset_task);
2080
2081         /* If we're already down or resetting, just bail */
2082         if (test_bit(__IXGBEVF_DOWN, &adapter->state) ||
2083             test_bit(__IXGBEVF_RESETTING, &adapter->state))
2084                 return;
2085
2086         adapter->tx_timeout_count++;
2087
2088         ixgbevf_reinit_locked(adapter);
2089 }
2090
2091 /**
2092  * ixgbevf_watchdog_task - worker thread to bring link up
2093  * @work: pointer to work_struct containing our data
2094  **/
2095 static void ixgbevf_watchdog_task(struct work_struct *work)
2096 {
2097         struct ixgbevf_adapter *adapter = container_of(work,
2098                                                        struct ixgbevf_adapter,
2099                                                        watchdog_task);
2100         struct net_device *netdev = adapter->netdev;
2101         struct ixgbe_hw *hw = &adapter->hw;
2102         u32 link_speed = adapter->link_speed;
2103         bool link_up = adapter->link_up;
2104
2105         adapter->flags |= IXGBE_FLAG_IN_WATCHDOG_TASK;
2106
2107         /*
2108          * Always check the link on the watchdog because we have
2109          * no LSC interrupt
2110          */
2111         if (hw->mac.ops.check_link) {
2112                 s32 need_reset;
2113
2114                 spin_lock(&adapter->mbx_lock);
2115
2116                 need_reset = hw->mac.ops.check_link(hw, &link_speed,
2117                                                     &link_up, false);
2118
2119                 spin_unlock(&adapter->mbx_lock);
2120
2121                 if (need_reset) {
2122                         adapter->link_up = link_up;
2123                         adapter->link_speed = link_speed;
2124                         netif_carrier_off(netdev);
2125                         netif_tx_stop_all_queues(netdev);
2126                         schedule_work(&adapter->reset_task);
2127                         goto pf_has_reset;
2128                 }
2129         } else {
2130                 /* always assume link is up, if no check link
2131                  * function */
2132                 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
2133                 link_up = true;
2134         }
2135         adapter->link_up = link_up;
2136         adapter->link_speed = link_speed;
2137
2138         if (link_up) {
2139                 if (!netif_carrier_ok(netdev)) {
2140                         hw_dbg(&adapter->hw, "NIC Link is Up, %u Gbps\n",
2141                                (link_speed == IXGBE_LINK_SPEED_10GB_FULL) ?
2142                                10 : 1);
2143                         netif_carrier_on(netdev);
2144                         netif_tx_wake_all_queues(netdev);
2145                 }
2146         } else {
2147                 adapter->link_up = false;
2148                 adapter->link_speed = 0;
2149                 if (netif_carrier_ok(netdev)) {
2150                         hw_dbg(&adapter->hw, "NIC Link is Down\n");
2151                         netif_carrier_off(netdev);
2152                         netif_tx_stop_all_queues(netdev);
2153                 }
2154         }
2155
2156         ixgbevf_update_stats(adapter);
2157
2158 pf_has_reset:
2159         /* Reset the timer */
2160         if (!test_bit(__IXGBEVF_DOWN, &adapter->state))
2161                 mod_timer(&adapter->watchdog_timer,
2162                           round_jiffies(jiffies + (2 * HZ)));
2163
2164         adapter->flags &= ~IXGBE_FLAG_IN_WATCHDOG_TASK;
2165 }
2166
2167 /**
2168  * ixgbevf_free_tx_resources - Free Tx Resources per Queue
2169  * @adapter: board private structure
2170  * @tx_ring: Tx descriptor ring for a specific queue
2171  *
2172  * Free all transmit software resources
2173  **/
2174 void ixgbevf_free_tx_resources(struct ixgbevf_adapter *adapter,
2175                                struct ixgbevf_ring *tx_ring)
2176 {
2177         struct pci_dev *pdev = adapter->pdev;
2178
2179         ixgbevf_clean_tx_ring(adapter, tx_ring);
2180
2181         vfree(tx_ring->tx_buffer_info);
2182         tx_ring->tx_buffer_info = NULL;
2183
2184         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2185                           tx_ring->dma);
2186
2187         tx_ring->desc = NULL;
2188 }
2189
2190 /**
2191  * ixgbevf_free_all_tx_resources - Free Tx Resources for All Queues
2192  * @adapter: board private structure
2193  *
2194  * Free all transmit software resources
2195  **/
2196 static void ixgbevf_free_all_tx_resources(struct ixgbevf_adapter *adapter)
2197 {
2198         int i;
2199
2200         for (i = 0; i < adapter->num_tx_queues; i++)
2201                 if (adapter->tx_ring[i].desc)
2202                         ixgbevf_free_tx_resources(adapter,
2203                                                   &adapter->tx_ring[i]);
2204
2205 }
2206
2207 /**
2208  * ixgbevf_setup_tx_resources - allocate Tx resources (Descriptors)
2209  * @adapter: board private structure
2210  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
2211  *
2212  * Return 0 on success, negative on failure
2213  **/
2214 int ixgbevf_setup_tx_resources(struct ixgbevf_adapter *adapter,
2215                                struct ixgbevf_ring *tx_ring)
2216 {
2217         struct pci_dev *pdev = adapter->pdev;
2218         int size;
2219
2220         size = sizeof(struct ixgbevf_tx_buffer) * tx_ring->count;
2221         tx_ring->tx_buffer_info = vzalloc(size);
2222         if (!tx_ring->tx_buffer_info)
2223                 goto err;
2224
2225         /* round up to nearest 4K */
2226         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
2227         tx_ring->size = ALIGN(tx_ring->size, 4096);
2228
2229         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
2230                                            &tx_ring->dma, GFP_KERNEL);
2231         if (!tx_ring->desc)
2232                 goto err;
2233
2234         tx_ring->next_to_use = 0;
2235         tx_ring->next_to_clean = 0;
2236         return 0;
2237
2238 err:
2239         vfree(tx_ring->tx_buffer_info);
2240         tx_ring->tx_buffer_info = NULL;
2241         hw_dbg(&adapter->hw, "Unable to allocate memory for the transmit "
2242                "descriptor ring\n");
2243         return -ENOMEM;
2244 }
2245
2246 /**
2247  * ixgbevf_setup_all_tx_resources - allocate all queues Tx resources
2248  * @adapter: board private structure
2249  *
2250  * If this function returns with an error, then it's possible one or
2251  * more of the rings is populated (while the rest are not).  It is the
2252  * callers duty to clean those orphaned rings.
2253  *
2254  * Return 0 on success, negative on failure
2255  **/
2256 static int ixgbevf_setup_all_tx_resources(struct ixgbevf_adapter *adapter)
2257 {
2258         int i, err = 0;
2259
2260         for (i = 0; i < adapter->num_tx_queues; i++) {
2261                 err = ixgbevf_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2262                 if (!err)
2263                         continue;
2264                 hw_dbg(&adapter->hw,
2265                        "Allocation for Tx Queue %u failed\n", i);
2266                 break;
2267         }
2268
2269         return err;
2270 }
2271
2272 /**
2273  * ixgbevf_setup_rx_resources - allocate Rx resources (Descriptors)
2274  * @adapter: board private structure
2275  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
2276  *
2277  * Returns 0 on success, negative on failure
2278  **/
2279 int ixgbevf_setup_rx_resources(struct ixgbevf_adapter *adapter,
2280                                struct ixgbevf_ring *rx_ring)
2281 {
2282         struct pci_dev *pdev = adapter->pdev;
2283         int size;
2284
2285         size = sizeof(struct ixgbevf_rx_buffer) * rx_ring->count;
2286         rx_ring->rx_buffer_info = vzalloc(size);
2287         if (!rx_ring->rx_buffer_info)
2288                 goto alloc_failed;
2289
2290         /* Round up to nearest 4K */
2291         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
2292         rx_ring->size = ALIGN(rx_ring->size, 4096);
2293
2294         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
2295                                            &rx_ring->dma, GFP_KERNEL);
2296
2297         if (!rx_ring->desc) {
2298                 hw_dbg(&adapter->hw,
2299                        "Unable to allocate memory for "
2300                        "the receive descriptor ring\n");
2301                 vfree(rx_ring->rx_buffer_info);
2302                 rx_ring->rx_buffer_info = NULL;
2303                 goto alloc_failed;
2304         }
2305
2306         rx_ring->next_to_clean = 0;
2307         rx_ring->next_to_use = 0;
2308
2309         return 0;
2310 alloc_failed:
2311         return -ENOMEM;
2312 }
2313
2314 /**
2315  * ixgbevf_setup_all_rx_resources - allocate all queues Rx resources
2316  * @adapter: board private structure
2317  *
2318  * If this function returns with an error, then it's possible one or
2319  * more of the rings is populated (while the rest are not).  It is the
2320  * callers duty to clean those orphaned rings.
2321  *
2322  * Return 0 on success, negative on failure
2323  **/
2324 static int ixgbevf_setup_all_rx_resources(struct ixgbevf_adapter *adapter)
2325 {
2326         int i, err = 0;
2327
2328         for (i = 0; i < adapter->num_rx_queues; i++) {
2329                 err = ixgbevf_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2330                 if (!err)
2331                         continue;
2332                 hw_dbg(&adapter->hw,
2333                        "Allocation for Rx Queue %u failed\n", i);
2334                 break;
2335         }
2336         return err;
2337 }
2338
2339 /**
2340  * ixgbevf_free_rx_resources - Free Rx Resources
2341  * @adapter: board private structure
2342  * @rx_ring: ring to clean the resources from
2343  *
2344  * Free all receive software resources
2345  **/
2346 void ixgbevf_free_rx_resources(struct ixgbevf_adapter *adapter,
2347                                struct ixgbevf_ring *rx_ring)
2348 {
2349         struct pci_dev *pdev = adapter->pdev;
2350
2351         ixgbevf_clean_rx_ring(adapter, rx_ring);
2352
2353         vfree(rx_ring->rx_buffer_info);
2354         rx_ring->rx_buffer_info = NULL;
2355
2356         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2357                           rx_ring->dma);
2358
2359         rx_ring->desc = NULL;
2360 }
2361
2362 /**
2363  * ixgbevf_free_all_rx_resources - Free Rx Resources for All Queues
2364  * @adapter: board private structure
2365  *
2366  * Free all receive software resources
2367  **/
2368 static void ixgbevf_free_all_rx_resources(struct ixgbevf_adapter *adapter)
2369 {
2370         int i;
2371
2372         for (i = 0; i < adapter->num_rx_queues; i++)
2373                 if (adapter->rx_ring[i].desc)
2374                         ixgbevf_free_rx_resources(adapter,
2375                                                   &adapter->rx_ring[i]);
2376 }
2377
2378 /**
2379  * ixgbevf_open - Called when a network interface is made active
2380  * @netdev: network interface device structure
2381  *
2382  * Returns 0 on success, negative value on failure
2383  *
2384  * The open entry point is called when a network interface is made
2385  * active by the system (IFF_UP).  At this point all resources needed
2386  * for transmit and receive operations are allocated, the interrupt
2387  * handler is registered with the OS, the watchdog timer is started,
2388  * and the stack is notified that the interface is ready.
2389  **/
2390 static int ixgbevf_open(struct net_device *netdev)
2391 {
2392         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2393         struct ixgbe_hw *hw = &adapter->hw;
2394         int err;
2395
2396         /* disallow open during test */
2397         if (test_bit(__IXGBEVF_TESTING, &adapter->state))
2398                 return -EBUSY;
2399
2400         if (hw->adapter_stopped) {
2401                 ixgbevf_reset(adapter);
2402                 /* if adapter is still stopped then PF isn't up and
2403                  * the vf can't start. */
2404                 if (hw->adapter_stopped) {
2405                         err = IXGBE_ERR_MBX;
2406                         pr_err("Unable to start - perhaps the PF Driver isn't "
2407                                "up yet\n");
2408                         goto err_setup_reset;
2409                 }
2410         }
2411
2412         ixgbevf_negotiate_api(adapter);
2413
2414         /* allocate transmit descriptors */
2415         err = ixgbevf_setup_all_tx_resources(adapter);
2416         if (err)
2417                 goto err_setup_tx;
2418
2419         /* allocate receive descriptors */
2420         err = ixgbevf_setup_all_rx_resources(adapter);
2421         if (err)
2422                 goto err_setup_rx;
2423
2424         ixgbevf_configure(adapter);
2425
2426         /*
2427          * Map the Tx/Rx rings to the vectors we were allotted.
2428          * if request_irq will be called in this function map_rings
2429          * must be called *before* up_complete
2430          */
2431         ixgbevf_map_rings_to_vectors(adapter);
2432
2433         ixgbevf_up_complete(adapter);
2434
2435         /* clear any pending interrupts, may auto mask */
2436         IXGBE_READ_REG(hw, IXGBE_VTEICR);
2437         err = ixgbevf_request_irq(adapter);
2438         if (err)
2439                 goto err_req_irq;
2440
2441         ixgbevf_irq_enable(adapter);
2442
2443         return 0;
2444
2445 err_req_irq:
2446         ixgbevf_down(adapter);
2447         ixgbevf_free_irq(adapter);
2448 err_setup_rx:
2449         ixgbevf_free_all_rx_resources(adapter);
2450 err_setup_tx:
2451         ixgbevf_free_all_tx_resources(adapter);
2452         ixgbevf_reset(adapter);
2453
2454 err_setup_reset:
2455
2456         return err;
2457 }
2458
2459 /**
2460  * ixgbevf_close - Disables a network interface
2461  * @netdev: network interface device structure
2462  *
2463  * Returns 0, this is not allowed to fail
2464  *
2465  * The close entry point is called when an interface is de-activated
2466  * by the OS.  The hardware is still under the drivers control, but
2467  * needs to be disabled.  A global MAC reset is issued to stop the
2468  * hardware, and all transmit and receive resources are freed.
2469  **/
2470 static int ixgbevf_close(struct net_device *netdev)
2471 {
2472         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2473
2474         ixgbevf_down(adapter);
2475         ixgbevf_free_irq(adapter);
2476
2477         ixgbevf_free_all_tx_resources(adapter);
2478         ixgbevf_free_all_rx_resources(adapter);
2479
2480         return 0;
2481 }
2482
2483 static void ixgbevf_tx_ctxtdesc(struct ixgbevf_ring *tx_ring,
2484                                 u32 vlan_macip_lens, u32 type_tucmd,
2485                                 u32 mss_l4len_idx)
2486 {
2487         struct ixgbe_adv_tx_context_desc *context_desc;
2488         u16 i = tx_ring->next_to_use;
2489
2490         context_desc = IXGBEVF_TX_CTXTDESC(tx_ring, i);
2491
2492         i++;
2493         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
2494
2495         /* set bits to identify this as an advanced context descriptor */
2496         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
2497
2498         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
2499         context_desc->seqnum_seed       = 0;
2500         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
2501         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2502 }
2503
2504 static int ixgbevf_tso(struct ixgbevf_ring *tx_ring,
2505                        struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2506 {
2507         u32 vlan_macip_lens, type_tucmd;
2508         u32 mss_l4len_idx, l4len;
2509
2510         if (!skb_is_gso(skb))
2511                 return 0;
2512
2513         if (skb_header_cloned(skb)) {
2514                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2515                 if (err)
2516                         return err;
2517         }
2518
2519         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2520         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
2521
2522         if (skb->protocol == htons(ETH_P_IP)) {
2523                 struct iphdr *iph = ip_hdr(skb);
2524                 iph->tot_len = 0;
2525                 iph->check = 0;
2526                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2527                                                          iph->daddr, 0,
2528                                                          IPPROTO_TCP,
2529                                                          0);
2530                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2531         } else if (skb_is_gso_v6(skb)) {
2532                 ipv6_hdr(skb)->payload_len = 0;
2533                 tcp_hdr(skb)->check =
2534                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2535                                      &ipv6_hdr(skb)->daddr,
2536                                      0, IPPROTO_TCP, 0);
2537         }
2538
2539         /* compute header lengths */
2540         l4len = tcp_hdrlen(skb);
2541         *hdr_len += l4len;
2542         *hdr_len = skb_transport_offset(skb) + l4len;
2543
2544         /* mss_l4len_id: use 1 as index for TSO */
2545         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
2546         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
2547         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
2548
2549         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
2550         vlan_macip_lens = skb_network_header_len(skb);
2551         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2552         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2553
2554         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2555                             type_tucmd, mss_l4len_idx);
2556
2557         return 1;
2558 }
2559
2560 static bool ixgbevf_tx_csum(struct ixgbevf_ring *tx_ring,
2561                             struct sk_buff *skb, u32 tx_flags)
2562 {
2563
2564
2565
2566         u32 vlan_macip_lens = 0;
2567         u32 mss_l4len_idx = 0;
2568         u32 type_tucmd = 0;
2569
2570         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2571                 u8 l4_hdr = 0;
2572                 switch (skb->protocol) {
2573                 case __constant_htons(ETH_P_IP):
2574                         vlan_macip_lens |= skb_network_header_len(skb);
2575                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
2576                         l4_hdr = ip_hdr(skb)->protocol;
2577                         break;
2578                 case __constant_htons(ETH_P_IPV6):
2579                         vlan_macip_lens |= skb_network_header_len(skb);
2580                         l4_hdr = ipv6_hdr(skb)->nexthdr;
2581                         break;
2582                 default:
2583                         if (unlikely(net_ratelimit())) {
2584                                 dev_warn(tx_ring->dev,
2585                                  "partial checksum but proto=%x!\n",
2586                                  skb->protocol);
2587                         }
2588                         break;
2589                 }
2590
2591                 switch (l4_hdr) {
2592                 case IPPROTO_TCP:
2593                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2594                         mss_l4len_idx = tcp_hdrlen(skb) <<
2595                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2596                         break;
2597                 case IPPROTO_SCTP:
2598                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
2599                         mss_l4len_idx = sizeof(struct sctphdr) <<
2600                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2601                         break;
2602                 case IPPROTO_UDP:
2603                         mss_l4len_idx = sizeof(struct udphdr) <<
2604                                         IXGBE_ADVTXD_L4LEN_SHIFT;
2605                         break;
2606                 default:
2607                         if (unlikely(net_ratelimit())) {
2608                                 dev_warn(tx_ring->dev,
2609                                  "partial checksum but l4 proto=%x!\n",
2610                                  l4_hdr);
2611                         }
2612                         break;
2613                 }
2614         }
2615
2616         /* vlan_macip_lens: MACLEN, VLAN tag */
2617         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
2618         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
2619
2620         ixgbevf_tx_ctxtdesc(tx_ring, vlan_macip_lens,
2621                             type_tucmd, mss_l4len_idx);
2622
2623         return (skb->ip_summed == CHECKSUM_PARTIAL);
2624 }
2625
2626 static int ixgbevf_tx_map(struct ixgbevf_ring *tx_ring,
2627                           struct sk_buff *skb, u32 tx_flags,
2628                           unsigned int first)
2629 {
2630         struct ixgbevf_tx_buffer *tx_buffer_info;
2631         unsigned int len;
2632         unsigned int total = skb->len;
2633         unsigned int offset = 0, size;
2634         int count = 0;
2635         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
2636         unsigned int f;
2637         int i;
2638
2639         i = tx_ring->next_to_use;
2640
2641         len = min(skb_headlen(skb), total);
2642         while (len) {
2643                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2644                 size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2645
2646                 tx_buffer_info->length = size;
2647                 tx_buffer_info->mapped_as_page = false;
2648                 tx_buffer_info->dma = dma_map_single(tx_ring->dev,
2649                                                      skb->data + offset,
2650                                                      size, DMA_TO_DEVICE);
2651                 if (dma_mapping_error(tx_ring->dev, tx_buffer_info->dma))
2652                         goto dma_error;
2653                 tx_buffer_info->next_to_watch = i;
2654
2655                 len -= size;
2656                 total -= size;
2657                 offset += size;
2658                 count++;
2659                 i++;
2660                 if (i == tx_ring->count)
2661                         i = 0;
2662         }
2663
2664         for (f = 0; f < nr_frags; f++) {
2665                 const struct skb_frag_struct *frag;
2666
2667                 frag = &skb_shinfo(skb)->frags[f];
2668                 len = min((unsigned int)skb_frag_size(frag), total);
2669                 offset = 0;
2670
2671                 while (len) {
2672                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
2673                         size = min(len, (unsigned int)IXGBE_MAX_DATA_PER_TXD);
2674
2675                         tx_buffer_info->length = size;
2676                         tx_buffer_info->dma =
2677                                 skb_frag_dma_map(tx_ring->dev, frag,
2678                                                  offset, size, DMA_TO_DEVICE);
2679                         tx_buffer_info->mapped_as_page = true;
2680                         if (dma_mapping_error(tx_ring->dev,
2681                                               tx_buffer_info->dma))
2682                                 goto dma_error;
2683                         tx_buffer_info->next_to_watch = i;
2684
2685                         len -= size;
2686                         total -= size;
2687                         offset += size;
2688                         count++;
2689                         i++;
2690                         if (i == tx_ring->count)
2691                                 i = 0;
2692                 }
2693                 if (total == 0)
2694                         break;
2695         }
2696
2697         if (i == 0)
2698                 i = tx_ring->count - 1;
2699         else
2700                 i = i - 1;
2701         tx_ring->tx_buffer_info[i].skb = skb;
2702         tx_ring->tx_buffer_info[first].next_to_watch = i;
2703         tx_ring->tx_buffer_info[first].time_stamp = jiffies;
2704
2705         return count;
2706
2707 dma_error:
2708         dev_err(tx_ring->dev, "TX DMA map failed\n");
2709
2710         /* clear timestamp and dma mappings for failed tx_buffer_info map */
2711         tx_buffer_info->dma = 0;
2712         tx_buffer_info->next_to_watch = 0;
2713         count--;
2714
2715         /* clear timestamp and dma mappings for remaining portion of packet */
2716         while (count >= 0) {
2717                 count--;
2718                 i--;
2719                 if (i < 0)
2720                         i += tx_ring->count;
2721                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2722                 ixgbevf_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
2723         }
2724
2725         return count;
2726 }
2727
2728 static void ixgbevf_tx_queue(struct ixgbevf_ring *tx_ring, int tx_flags,
2729                              int count, u32 paylen, u8 hdr_len)
2730 {
2731         union ixgbe_adv_tx_desc *tx_desc = NULL;
2732         struct ixgbevf_tx_buffer *tx_buffer_info;
2733         u32 olinfo_status = 0, cmd_type_len = 0;
2734         unsigned int i;
2735
2736         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
2737
2738         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
2739
2740         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
2741
2742         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2743                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
2744
2745         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
2746                 olinfo_status |= IXGBE_ADVTXD_POPTS_TXSM;
2747
2748         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
2749                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
2750
2751                 /* use index 1 context for tso */
2752                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
2753                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
2754                         olinfo_status |= IXGBE_ADVTXD_POPTS_IXSM;
2755
2756         }
2757
2758         /*
2759          * Check Context must be set if Tx switch is enabled, which it
2760          * always is for case where virtual functions are running
2761          */
2762         olinfo_status |= IXGBE_ADVTXD_CC;
2763
2764         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
2765
2766         i = tx_ring->next_to_use;
2767         while (count--) {
2768                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2769                 tx_desc = IXGBEVF_TX_DESC(tx_ring, i);
2770                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
2771                 tx_desc->read.cmd_type_len =
2772                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
2773                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2774                 i++;
2775                 if (i == tx_ring->count)
2776                         i = 0;
2777         }
2778
2779         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
2780
2781         tx_ring->next_to_use = i;
2782 }
2783
2784 static int __ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
2785 {
2786         struct ixgbevf_adapter *adapter = netdev_priv(tx_ring->netdev);
2787
2788         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
2789         /* Herbert's original patch had:
2790          *  smp_mb__after_netif_stop_queue();
2791          * but since that doesn't exist yet, just open code it. */
2792         smp_mb();
2793
2794         /* We need to check again in a case another CPU has just
2795          * made room available. */
2796         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
2797                 return -EBUSY;
2798
2799         /* A reprieve! - use start_queue because it doesn't call schedule */
2800         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
2801         ++adapter->restart_queue;
2802         return 0;
2803 }
2804
2805 static int ixgbevf_maybe_stop_tx(struct ixgbevf_ring *tx_ring, int size)
2806 {
2807         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
2808                 return 0;
2809         return __ixgbevf_maybe_stop_tx(tx_ring, size);
2810 }
2811
2812 static int ixgbevf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2813 {
2814         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2815         struct ixgbevf_ring *tx_ring;
2816         unsigned int first;
2817         unsigned int tx_flags = 0;
2818         u8 hdr_len = 0;
2819         int r_idx = 0, tso;
2820         u16 count = TXD_USE_COUNT(skb_headlen(skb));
2821 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
2822         unsigned short f;
2823 #endif
2824
2825         tx_ring = &adapter->tx_ring[r_idx];
2826
2827         /*
2828          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
2829          *       + 1 desc for skb_headlen/IXGBE_MAX_DATA_PER_TXD,
2830          *       + 2 desc gap to keep tail from touching head,
2831          *       + 1 desc for context descriptor,
2832          * otherwise try next time
2833          */
2834 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
2835         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
2836                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
2837 #else
2838         count += skb_shinfo(skb)->nr_frags;
2839 #endif
2840         if (ixgbevf_maybe_stop_tx(tx_ring, count + 3)) {
2841                 adapter->tx_busy++;
2842                 return NETDEV_TX_BUSY;
2843         }
2844
2845         if (vlan_tx_tag_present(skb)) {
2846                 tx_flags |= vlan_tx_tag_get(skb);
2847                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
2848                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
2849         }
2850
2851         first = tx_ring->next_to_use;
2852
2853         if (skb->protocol == htons(ETH_P_IP))
2854                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
2855         tso = ixgbevf_tso(tx_ring, skb, tx_flags, &hdr_len);
2856         if (tso < 0) {
2857                 dev_kfree_skb_any(skb);
2858                 return NETDEV_TX_OK;
2859         }
2860
2861         if (tso)
2862                 tx_flags |= IXGBE_TX_FLAGS_TSO | IXGBE_TX_FLAGS_CSUM;
2863         else if (ixgbevf_tx_csum(tx_ring, skb, tx_flags))
2864                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
2865
2866         ixgbevf_tx_queue(tx_ring, tx_flags,
2867                          ixgbevf_tx_map(tx_ring, skb, tx_flags, first),
2868                          skb->len, hdr_len);
2869         /*
2870          * Force memory writes to complete before letting h/w
2871          * know there are new descriptors to fetch.  (Only
2872          * applicable for weak-ordered memory model archs,
2873          * such as IA-64).
2874          */
2875         wmb();
2876
2877         writel(tx_ring->next_to_use, adapter->hw.hw_addr + tx_ring->tail);
2878
2879         ixgbevf_maybe_stop_tx(tx_ring, DESC_NEEDED);
2880
2881         return NETDEV_TX_OK;
2882 }
2883
2884 /**
2885  * ixgbevf_set_mac - Change the Ethernet Address of the NIC
2886  * @netdev: network interface device structure
2887  * @p: pointer to an address structure
2888  *
2889  * Returns 0 on success, negative on failure
2890  **/
2891 static int ixgbevf_set_mac(struct net_device *netdev, void *p)
2892 {
2893         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2894         struct ixgbe_hw *hw = &adapter->hw;
2895         struct sockaddr *addr = p;
2896
2897         if (!is_valid_ether_addr(addr->sa_data))
2898                 return -EADDRNOTAVAIL;
2899
2900         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2901         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
2902
2903         spin_lock(&adapter->mbx_lock);
2904
2905         if (hw->mac.ops.set_rar)
2906                 hw->mac.ops.set_rar(hw, 0, hw->mac.addr, 0);
2907
2908         spin_unlock(&adapter->mbx_lock);
2909
2910         return 0;
2911 }
2912
2913 /**
2914  * ixgbevf_change_mtu - Change the Maximum Transfer Unit
2915  * @netdev: network interface device structure
2916  * @new_mtu: new value for maximum frame size
2917  *
2918  * Returns 0 on success, negative on failure
2919  **/
2920 static int ixgbevf_change_mtu(struct net_device *netdev, int new_mtu)
2921 {
2922         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2923         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2924         int max_possible_frame = MAXIMUM_ETHERNET_VLAN_SIZE;
2925
2926         if (adapter->hw.mac.type == ixgbe_mac_X540_vf)
2927                 max_possible_frame = IXGBE_MAX_JUMBO_FRAME_SIZE;
2928
2929         /* MTU < 68 is an error and causes problems on some kernels */
2930         if ((new_mtu < 68) || (max_frame > max_possible_frame))
2931                 return -EINVAL;
2932
2933         hw_dbg(&adapter->hw, "changing MTU from %d to %d\n",
2934                netdev->mtu, new_mtu);
2935         /* must set new MTU before calling down or up */
2936         netdev->mtu = new_mtu;
2937
2938         if (netif_running(netdev))
2939                 ixgbevf_reinit_locked(adapter);
2940
2941         return 0;
2942 }
2943
2944 static int ixgbevf_suspend(struct pci_dev *pdev, pm_message_t state)
2945 {
2946         struct net_device *netdev = pci_get_drvdata(pdev);
2947         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
2948 #ifdef CONFIG_PM
2949         int retval = 0;
2950 #endif
2951
2952         netif_device_detach(netdev);
2953
2954         if (netif_running(netdev)) {
2955                 rtnl_lock();
2956                 ixgbevf_down(adapter);
2957                 ixgbevf_free_irq(adapter);
2958                 ixgbevf_free_all_tx_resources(adapter);
2959                 ixgbevf_free_all_rx_resources(adapter);
2960                 rtnl_unlock();
2961         }
2962
2963         ixgbevf_clear_interrupt_scheme(adapter);
2964
2965 #ifdef CONFIG_PM
2966         retval = pci_save_state(pdev);
2967         if (retval)
2968                 return retval;
2969
2970 #endif
2971         pci_disable_device(pdev);
2972
2973         return 0;
2974 }
2975
2976 #ifdef CONFIG_PM
2977 static int ixgbevf_resume(struct pci_dev *pdev)
2978 {
2979         struct ixgbevf_adapter *adapter = pci_get_drvdata(pdev);
2980         struct net_device *netdev = adapter->netdev;
2981         u32 err;
2982
2983         pci_set_power_state(pdev, PCI_D0);
2984         pci_restore_state(pdev);
2985         /*
2986          * pci_restore_state clears dev->state_saved so call
2987          * pci_save_state to restore it.
2988          */
2989         pci_save_state(pdev);
2990
2991         err = pci_enable_device_mem(pdev);
2992         if (err) {
2993                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2994                 return err;
2995         }
2996         pci_set_master(pdev);
2997
2998         rtnl_lock();
2999         err = ixgbevf_init_interrupt_scheme(adapter);
3000         rtnl_unlock();
3001         if (err) {
3002                 dev_err(&pdev->dev, "Cannot initialize interrupts\n");
3003                 return err;
3004         }
3005
3006         ixgbevf_reset(adapter);
3007
3008         if (netif_running(netdev)) {
3009                 err = ixgbevf_open(netdev);
3010                 if (err)
3011                         return err;
3012         }
3013
3014         netif_device_attach(netdev);
3015
3016         return err;
3017 }
3018
3019 #endif /* CONFIG_PM */
3020 static void ixgbevf_shutdown(struct pci_dev *pdev)
3021 {
3022         ixgbevf_suspend(pdev, PMSG_SUSPEND);
3023 }
3024
3025 static struct rtnl_link_stats64 *ixgbevf_get_stats(struct net_device *netdev,
3026                                                 struct rtnl_link_stats64 *stats)
3027 {
3028         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3029         unsigned int start;
3030         u64 bytes, packets;
3031         const struct ixgbevf_ring *ring;
3032         int i;
3033
3034         ixgbevf_update_stats(adapter);
3035
3036         stats->multicast = adapter->stats.vfmprc - adapter->stats.base_vfmprc;
3037
3038         for (i = 0; i < adapter->num_rx_queues; i++) {
3039                 ring = &adapter->rx_ring[i];
3040                 do {
3041                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3042                         bytes = ring->total_bytes;
3043                         packets = ring->total_packets;
3044                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3045                 stats->rx_bytes += bytes;
3046                 stats->rx_packets += packets;
3047         }
3048
3049         for (i = 0; i < adapter->num_tx_queues; i++) {
3050                 ring = &adapter->tx_ring[i];
3051                 do {
3052                         start = u64_stats_fetch_begin_bh(&ring->syncp);
3053                         bytes = ring->total_bytes;
3054                         packets = ring->total_packets;
3055                 } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
3056                 stats->tx_bytes += bytes;
3057                 stats->tx_packets += packets;
3058         }
3059
3060         return stats;
3061 }
3062
3063 static const struct net_device_ops ixgbevf_netdev_ops = {
3064         .ndo_open               = ixgbevf_open,
3065         .ndo_stop               = ixgbevf_close,
3066         .ndo_start_xmit         = ixgbevf_xmit_frame,
3067         .ndo_set_rx_mode        = ixgbevf_set_rx_mode,
3068         .ndo_get_stats64        = ixgbevf_get_stats,
3069         .ndo_validate_addr      = eth_validate_addr,
3070         .ndo_set_mac_address    = ixgbevf_set_mac,
3071         .ndo_change_mtu         = ixgbevf_change_mtu,
3072         .ndo_tx_timeout         = ixgbevf_tx_timeout,
3073         .ndo_vlan_rx_add_vid    = ixgbevf_vlan_rx_add_vid,
3074         .ndo_vlan_rx_kill_vid   = ixgbevf_vlan_rx_kill_vid,
3075 };
3076
3077 static void ixgbevf_assign_netdev_ops(struct net_device *dev)
3078 {
3079         dev->netdev_ops = &ixgbevf_netdev_ops;
3080         ixgbevf_set_ethtool_ops(dev);
3081         dev->watchdog_timeo = 5 * HZ;
3082 }
3083
3084 /**
3085  * ixgbevf_probe - Device Initialization Routine
3086  * @pdev: PCI device information struct
3087  * @ent: entry in ixgbevf_pci_tbl
3088  *
3089  * Returns 0 on success, negative on failure
3090  *
3091  * ixgbevf_probe initializes an adapter identified by a pci_dev structure.
3092  * The OS initialization, configuring of the adapter private structure,
3093  * and a hardware reset occur.
3094  **/
3095 static int __devinit ixgbevf_probe(struct pci_dev *pdev,
3096                                    const struct pci_device_id *ent)
3097 {
3098         struct net_device *netdev;
3099         struct ixgbevf_adapter *adapter = NULL;
3100         struct ixgbe_hw *hw = NULL;
3101         const struct ixgbevf_info *ii = ixgbevf_info_tbl[ent->driver_data];
3102         static int cards_found;
3103         int err, pci_using_dac;
3104
3105         err = pci_enable_device(pdev);
3106         if (err)
3107                 return err;
3108
3109         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
3110             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
3111                 pci_using_dac = 1;
3112         } else {
3113                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
3114                 if (err) {
3115                         err = dma_set_coherent_mask(&pdev->dev,
3116                                                     DMA_BIT_MASK(32));
3117                         if (err) {
3118                                 dev_err(&pdev->dev, "No usable DMA "
3119                                         "configuration, aborting\n");
3120                                 goto err_dma;
3121                         }
3122                 }
3123                 pci_using_dac = 0;
3124         }
3125
3126         err = pci_request_regions(pdev, ixgbevf_driver_name);
3127         if (err) {
3128                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3129                 goto err_pci_reg;
3130         }
3131
3132         pci_set_master(pdev);
3133
3134         netdev = alloc_etherdev_mq(sizeof(struct ixgbevf_adapter),
3135                                    MAX_TX_QUEUES);
3136         if (!netdev) {
3137                 err = -ENOMEM;
3138                 goto err_alloc_etherdev;
3139         }
3140
3141         SET_NETDEV_DEV(netdev, &pdev->dev);
3142
3143         pci_set_drvdata(pdev, netdev);
3144         adapter = netdev_priv(netdev);
3145
3146         adapter->netdev = netdev;
3147         adapter->pdev = pdev;
3148         hw = &adapter->hw;
3149         hw->back = adapter;
3150         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3151
3152         /*
3153          * call save state here in standalone driver because it relies on
3154          * adapter struct to exist, and needs to call netdev_priv
3155          */
3156         pci_save_state(pdev);
3157
3158         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3159                               pci_resource_len(pdev, 0));
3160         if (!hw->hw_addr) {
3161                 err = -EIO;
3162                 goto err_ioremap;
3163         }
3164
3165         ixgbevf_assign_netdev_ops(netdev);
3166
3167         adapter->bd_number = cards_found;
3168
3169         /* Setup hw api */
3170         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3171         hw->mac.type  = ii->mac;
3172
3173         memcpy(&hw->mbx.ops, &ixgbevf_mbx_ops,
3174                sizeof(struct ixgbe_mbx_operations));
3175
3176         /* setup the private structure */
3177         err = ixgbevf_sw_init(adapter);
3178         if (err)
3179                 goto err_sw_init;
3180
3181         /* The HW MAC address was set and/or determined in sw_init */
3182         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
3183
3184         if (!is_valid_ether_addr(netdev->dev_addr)) {
3185                 pr_err("invalid MAC address\n");
3186                 err = -EIO;
3187                 goto err_sw_init;
3188         }
3189
3190         netdev->hw_features = NETIF_F_SG |
3191                            NETIF_F_IP_CSUM |
3192                            NETIF_F_IPV6_CSUM |
3193                            NETIF_F_TSO |
3194                            NETIF_F_TSO6 |
3195                            NETIF_F_RXCSUM;
3196
3197         netdev->features = netdev->hw_features |
3198                            NETIF_F_HW_VLAN_TX |
3199                            NETIF_F_HW_VLAN_RX |
3200                            NETIF_F_HW_VLAN_FILTER;
3201
3202         netdev->vlan_features |= NETIF_F_TSO;
3203         netdev->vlan_features |= NETIF_F_TSO6;
3204         netdev->vlan_features |= NETIF_F_IP_CSUM;
3205         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
3206         netdev->vlan_features |= NETIF_F_SG;
3207
3208         if (pci_using_dac)
3209                 netdev->features |= NETIF_F_HIGHDMA;
3210
3211         netdev->priv_flags |= IFF_UNICAST_FLT;
3212
3213         init_timer(&adapter->watchdog_timer);
3214         adapter->watchdog_timer.function = ixgbevf_watchdog;
3215         adapter->watchdog_timer.data = (unsigned long)adapter;
3216
3217         INIT_WORK(&adapter->reset_task, ixgbevf_reset_task);
3218         INIT_WORK(&adapter->watchdog_task, ixgbevf_watchdog_task);
3219
3220         err = ixgbevf_init_interrupt_scheme(adapter);
3221         if (err)
3222                 goto err_sw_init;
3223
3224         /* pick up the PCI bus settings for reporting later */
3225         if (hw->mac.ops.get_bus_info)
3226                 hw->mac.ops.get_bus_info(hw);
3227
3228         strcpy(netdev->name, "eth%d");
3229
3230         err = register_netdev(netdev);
3231         if (err)
3232                 goto err_register;
3233
3234         netif_carrier_off(netdev);
3235
3236         ixgbevf_init_last_counter_stats(adapter);
3237
3238         /* print the MAC address */
3239         hw_dbg(hw, "%pM\n", netdev->dev_addr);
3240
3241         hw_dbg(hw, "MAC: %d\n", hw->mac.type);
3242
3243         hw_dbg(hw, "Intel(R) 82599 Virtual Function\n");
3244         cards_found++;
3245         return 0;
3246
3247 err_register:
3248         ixgbevf_clear_interrupt_scheme(adapter);
3249 err_sw_init:
3250         ixgbevf_reset_interrupt_capability(adapter);
3251         iounmap(hw->hw_addr);
3252 err_ioremap:
3253         free_netdev(netdev);
3254 err_alloc_etherdev:
3255         pci_release_regions(pdev);
3256 err_pci_reg:
3257 err_dma:
3258         pci_disable_device(pdev);
3259         return err;
3260 }
3261
3262 /**
3263  * ixgbevf_remove - Device Removal Routine
3264  * @pdev: PCI device information struct
3265  *
3266  * ixgbevf_remove is called by the PCI subsystem to alert the driver
3267  * that it should release a PCI device.  The could be caused by a
3268  * Hot-Plug event, or because the driver is going to be removed from
3269  * memory.
3270  **/
3271 static void __devexit ixgbevf_remove(struct pci_dev *pdev)
3272 {
3273         struct net_device *netdev = pci_get_drvdata(pdev);
3274         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3275
3276         set_bit(__IXGBEVF_DOWN, &adapter->state);
3277
3278         del_timer_sync(&adapter->watchdog_timer);
3279
3280         cancel_work_sync(&adapter->reset_task);
3281         cancel_work_sync(&adapter->watchdog_task);
3282
3283         if (netdev->reg_state == NETREG_REGISTERED)
3284                 unregister_netdev(netdev);
3285
3286         ixgbevf_clear_interrupt_scheme(adapter);
3287         ixgbevf_reset_interrupt_capability(adapter);
3288
3289         iounmap(adapter->hw.hw_addr);
3290         pci_release_regions(pdev);
3291
3292         hw_dbg(&adapter->hw, "Remove complete\n");
3293
3294         kfree(adapter->tx_ring);
3295         kfree(adapter->rx_ring);
3296
3297         free_netdev(netdev);
3298
3299         pci_disable_device(pdev);
3300 }
3301
3302 /**
3303  * ixgbevf_io_error_detected - called when PCI error is detected
3304  * @pdev: Pointer to PCI device
3305  * @state: The current pci connection state
3306  *
3307  * This function is called after a PCI bus error affecting
3308  * this device has been detected.
3309  */
3310 static pci_ers_result_t ixgbevf_io_error_detected(struct pci_dev *pdev,
3311                                                   pci_channel_state_t state)
3312 {
3313         struct net_device *netdev = pci_get_drvdata(pdev);
3314         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3315
3316         netif_device_detach(netdev);
3317
3318         if (state == pci_channel_io_perm_failure)
3319                 return PCI_ERS_RESULT_DISCONNECT;
3320
3321         if (netif_running(netdev))
3322                 ixgbevf_down(adapter);
3323
3324         pci_disable_device(pdev);
3325
3326         /* Request a slot slot reset. */
3327         return PCI_ERS_RESULT_NEED_RESET;
3328 }
3329
3330 /**
3331  * ixgbevf_io_slot_reset - called after the pci bus has been reset.
3332  * @pdev: Pointer to PCI device
3333  *
3334  * Restart the card from scratch, as if from a cold-boot. Implementation
3335  * resembles the first-half of the ixgbevf_resume routine.
3336  */
3337 static pci_ers_result_t ixgbevf_io_slot_reset(struct pci_dev *pdev)
3338 {
3339         struct net_device *netdev = pci_get_drvdata(pdev);
3340         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3341
3342         if (pci_enable_device_mem(pdev)) {
3343                 dev_err(&pdev->dev,
3344                         "Cannot re-enable PCI device after reset.\n");
3345                 return PCI_ERS_RESULT_DISCONNECT;
3346         }
3347
3348         pci_set_master(pdev);
3349
3350         ixgbevf_reset(adapter);
3351
3352         return PCI_ERS_RESULT_RECOVERED;
3353 }
3354
3355 /**
3356  * ixgbevf_io_resume - called when traffic can start flowing again.
3357  * @pdev: Pointer to PCI device
3358  *
3359  * This callback is called when the error recovery driver tells us that
3360  * its OK to resume normal operation. Implementation resembles the
3361  * second-half of the ixgbevf_resume routine.
3362  */
3363 static void ixgbevf_io_resume(struct pci_dev *pdev)
3364 {
3365         struct net_device *netdev = pci_get_drvdata(pdev);
3366         struct ixgbevf_adapter *adapter = netdev_priv(netdev);
3367
3368         if (netif_running(netdev))
3369                 ixgbevf_up(adapter);
3370
3371         netif_device_attach(netdev);
3372 }
3373
3374 /* PCI Error Recovery (ERS) */
3375 static struct pci_error_handlers ixgbevf_err_handler = {
3376         .error_detected = ixgbevf_io_error_detected,
3377         .slot_reset = ixgbevf_io_slot_reset,
3378         .resume = ixgbevf_io_resume,
3379 };
3380
3381 static struct pci_driver ixgbevf_driver = {
3382         .name     = ixgbevf_driver_name,
3383         .id_table = ixgbevf_pci_tbl,
3384         .probe    = ixgbevf_probe,
3385         .remove   = __devexit_p(ixgbevf_remove),
3386 #ifdef CONFIG_PM
3387         /* Power Management Hooks */
3388         .suspend  = ixgbevf_suspend,
3389         .resume   = ixgbevf_resume,
3390 #endif
3391         .shutdown = ixgbevf_shutdown,
3392         .err_handler = &ixgbevf_err_handler
3393 };
3394
3395 /**
3396  * ixgbevf_init_module - Driver Registration Routine
3397  *
3398  * ixgbevf_init_module is the first routine called when the driver is
3399  * loaded. All it does is register with the PCI subsystem.
3400  **/
3401 static int __init ixgbevf_init_module(void)
3402 {
3403         int ret;
3404         pr_info("%s - version %s\n", ixgbevf_driver_string,
3405                 ixgbevf_driver_version);
3406
3407         pr_info("%s\n", ixgbevf_copyright);
3408
3409         ret = pci_register_driver(&ixgbevf_driver);
3410         return ret;
3411 }
3412
3413 module_init(ixgbevf_init_module);
3414
3415 /**
3416  * ixgbevf_exit_module - Driver Exit Cleanup Routine
3417  *
3418  * ixgbevf_exit_module is called just before the driver is removed
3419  * from memory.
3420  **/
3421 static void __exit ixgbevf_exit_module(void)
3422 {
3423         pci_unregister_driver(&ixgbevf_driver);
3424 }
3425
3426 #ifdef DEBUG
3427 /**
3428  * ixgbevf_get_hw_dev_name - return device name string
3429  * used by hardware layer to print debugging information
3430  **/
3431 char *ixgbevf_get_hw_dev_name(struct ixgbe_hw *hw)
3432 {
3433         struct ixgbevf_adapter *adapter = hw->back;
3434         return adapter->netdev->name;
3435 }
3436
3437 #endif
3438 module_exit(ixgbevf_exit_module);
3439
3440 /* ixgbevf_main.c */