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

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