drivers/net/igbvf/netdev.c

   1 /*******************************************************************************
   2
   3   Intel(R) 82576 Virtual Function Linux driver
   4   Copyright(c) 2009 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 #include <linux/module.h>
  29 #include <linux/types.h>
  30 #include <linux/init.h>
  31 #include <linux/pci.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/pagemap.h>
  34 #include <linux/delay.h>
  35 #include <linux/netdevice.h>
  36 #include <linux/tcp.h>
  37 #include <linux/ipv6.h>
  38 #include <net/checksum.h>
  39 #include <net/ip6_checksum.h>
  40 #include <linux/mii.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/if_vlan.h>
  43 #include <linux/pm_qos_params.h>
  44
  45 #include "igbvf.h"
  46
  47 #define DRV_VERSION "1.0.0-k0"
  48 char igbvf_driver_name[] = "igbvf";
  49 const char igbvf_driver_version[] = DRV_VERSION;
  50 static const char igbvf_driver_string[] =
  51                                 "Intel(R) Virtual Function Network Driver";
  52 static const char igbvf_copyright[] = "Copyright (c) 2009 Intel Corporation.";
  53
  54 static int igbvf_poll(struct napi_struct *napi, int budget);
  55 static void igbvf_reset(struct igbvf_adapter *);
  56 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
  57 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
  58
  59 static struct igbvf_info igbvf_vf_info = {
  60         .mac                    = e1000_vfadapt,
  61         .flags                  = 0,
  62         .pba                    = 10,
  63         .init_ops               = e1000_init_function_pointers_vf,
  64 };
  65
  66 static const struct igbvf_info *igbvf_info_tbl[] = {
  67         [board_vf]              = &igbvf_vf_info,
  68 };
  69
  70 /**
  71  * igbvf_desc_unused - calculate if we have unused descriptors
  72  **/
  73 static int igbvf_desc_unused(struct igbvf_ring *ring)
  74 {
  75         if (ring->next_to_clean > ring->next_to_use)
  76                 return ring->next_to_clean - ring->next_to_use - 1;
  77
  78         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  79 }
  80
  81 /**
  82  * igbvf_receive_skb - helper function to handle Rx indications
  83  * @adapter: board private structure
  84  * @status: descriptor status field as written by hardware
  85  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  86  * @skb: pointer to sk_buff to be indicated to stack
  87  **/
  88 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
  89                               struct net_device *netdev,
  90                               struct sk_buff *skb,
  91                               u32 status, u16 vlan)
  92 {
  93         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
  94                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
  95                                          le16_to_cpu(vlan) &
  96                                          E1000_RXD_SPC_VLAN_MASK);
  97         else
  98                 netif_receive_skb(skb);
  99
 100         netdev->last_rx = jiffies;
 101 }
 102
 103 static inline void igbvf_rx_checksum_adv(struct igbvf_adapter *adapter,
 104                                          u32 status_err, struct sk_buff *skb)
 105 {
 106         skb->ip_summed = CHECKSUM_NONE;
 107
 108         /* Ignore Checksum bit is set or checksum is disabled through ethtool */
 109         if ((status_err & E1000_RXD_STAT_IXSM) ||
 110             (adapter->flags & IGBVF_FLAG_RX_CSUM_DISABLED))
 111                 return;
 112
 113         /* TCP/UDP checksum error bit is set */
 114         if (status_err &
 115             (E1000_RXDEXT_STATERR_TCPE | E1000_RXDEXT_STATERR_IPE)) {
 116                 /* let the stack verify checksum errors */
 117                 adapter->hw_csum_err++;
 118                 return;
 119         }
 120
 121         /* It must be a TCP or UDP packet with a valid checksum */
 122         if (status_err & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS))
 123                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 124
 125         adapter->hw_csum_good++;
 126 }
 127
 128 /**
 129  * igbvf_alloc_rx_buffers - Replace used receive buffers; packet split
 130  * @rx_ring: address of ring structure to repopulate
 131  * @cleaned_count: number of buffers to repopulate
 132  **/
 133 static void igbvf_alloc_rx_buffers(struct igbvf_ring *rx_ring,
 134                                    int cleaned_count)
 135 {
 136         struct igbvf_adapter *adapter = rx_ring->adapter;
 137         struct net_device *netdev = adapter->netdev;
 138         struct pci_dev *pdev = adapter->pdev;
 139         union e1000_adv_rx_desc *rx_desc;
 140         struct igbvf_buffer *buffer_info;
 141         struct sk_buff *skb;
 142         unsigned int i;
 143         int bufsz;
 144
 145         i = rx_ring->next_to_use;
 146         buffer_info = &rx_ring->buffer_info[i];
 147
 148         if (adapter->rx_ps_hdr_size)
 149                 bufsz = adapter->rx_ps_hdr_size;
 150         else
 151                 bufsz = adapter->rx_buffer_len;
 152         bufsz += NET_IP_ALIGN;
 153
 154         while (cleaned_count--) {
 155                 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
 156
 157                 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
 158                         if (!buffer_info->page) {
 159                                 buffer_info->page = alloc_page(GFP_ATOMIC);
 160                                 if (!buffer_info->page) {
 161                                         adapter->alloc_rx_buff_failed++;
 162                                         goto no_buffers;
 163                                 }
 164                                 buffer_info->page_offset = 0;
 165                         } else {
 166                                 buffer_info->page_offset ^= PAGE_SIZE / 2;
 167                         }
 168                         buffer_info->page_dma =
 169                                 pci_map_page(pdev, buffer_info->page,
 170                                              buffer_info->page_offset,
 171                                              PAGE_SIZE / 2,
 172                                              PCI_DMA_FROMDEVICE);
 173                 }
 174
 175                 if (!buffer_info->skb) {
 176                         skb = netdev_alloc_skb(netdev, bufsz);
 177                         if (!skb) {
 178                                 adapter->alloc_rx_buff_failed++;
 179                                 goto no_buffers;
 180                         }
 181
 182                         /* Make buffer alignment 2 beyond a 16 byte boundary
 183                          * this will result in a 16 byte aligned IP header after
 184                          * the 14 byte MAC header is removed
 185                          */
 186                         skb_reserve(skb, NET_IP_ALIGN);
 187
 188                         buffer_info->skb = skb;
 189                         buffer_info->dma = pci_map_single(pdev, skb->data,
 190                                                           bufsz,
 191                                                           PCI_DMA_FROMDEVICE);
 192                 }
 193                 /* Refresh the desc even if buffer_addrs didn't change because
 194                  * each write-back erases this info. */
 195                 if (adapter->rx_ps_hdr_size) {
 196                         rx_desc->read.pkt_addr =
 197                              cpu_to_le64(buffer_info->page_dma);
 198                         rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
 199                 } else {
 200                         rx_desc->read.pkt_addr =
 201                              cpu_to_le64(buffer_info->dma);
 202                         rx_desc->read.hdr_addr = 0;
 203                 }
 204
 205                 i++;
 206                 if (i == rx_ring->count)
 207                         i = 0;
 208                 buffer_info = &rx_ring->buffer_info[i];
 209         }
 210
 211 no_buffers:
 212         if (rx_ring->next_to_use != i) {
 213                 rx_ring->next_to_use = i;
 214                 if (i == 0)
 215                         i = (rx_ring->count - 1);
 216                 else
 217                         i--;
 218
 219                 /* Force memory writes to complete before letting h/w
 220                  * know there are new descriptors to fetch.  (Only
 221                  * applicable for weak-ordered memory model archs,
 222                  * such as IA-64). */
 223                 wmb();
 224                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 225         }
 226 }
 227
 228 /**
 229  * igbvf_clean_rx_irq - Send received data up the network stack; legacy
 230  * @adapter: board private structure
 231  *
 232  * the return value indicates whether actual cleaning was done, there
 233  * is no guarantee that everything was cleaned
 234  **/
 235 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
 236                                int *work_done, int work_to_do)
 237 {
 238         struct igbvf_ring *rx_ring = adapter->rx_ring;
 239         struct net_device *netdev = adapter->netdev;
 240         struct pci_dev *pdev = adapter->pdev;
 241         union e1000_adv_rx_desc *rx_desc, *next_rxd;
 242         struct igbvf_buffer *buffer_info, *next_buffer;
 243         struct sk_buff *skb;
 244         bool cleaned = false;
 245         int cleaned_count = 0;
 246         unsigned int total_bytes = 0, total_packets = 0;
 247         unsigned int i;
 248         u32 length, hlen, staterr;
 249
 250         i = rx_ring->next_to_clean;
 251         rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
 252         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 253
 254         while (staterr & E1000_RXD_STAT_DD) {
 255                 if (*work_done >= work_to_do)
 256                         break;
 257                 (*work_done)++;
 258
 259                 buffer_info = &rx_ring->buffer_info[i];
 260
 261                 /* HW will not DMA in data larger than the given buffer, even
 262                  * if it parses the (NFS, of course) header to be larger.  In
 263                  * that case, it fills the header buffer and spills the rest
 264                  * into the page.
 265                  */
 266                 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info) &
 267                   E1000_RXDADV_HDRBUFLEN_MASK) >> E1000_RXDADV_HDRBUFLEN_SHIFT;
 268                 if (hlen > adapter->rx_ps_hdr_size)
 269                         hlen = adapter->rx_ps_hdr_size;
 270
 271                 length = le16_to_cpu(rx_desc->wb.upper.length);
 272                 cleaned = true;
 273                 cleaned_count++;
 274
 275                 skb = buffer_info->skb;
 276                 prefetch(skb->data - NET_IP_ALIGN);
 277                 buffer_info->skb = NULL;
 278                 if (!adapter->rx_ps_hdr_size) {
 279                         pci_unmap_single(pdev, buffer_info->dma,
 280                                          adapter->rx_buffer_len,
 281                                          PCI_DMA_FROMDEVICE);
 282                         buffer_info->dma = 0;
 283                         skb_put(skb, length);
 284                         goto send_up;
 285                 }
 286
 287                 if (!skb_shinfo(skb)->nr_frags) {
 288                         pci_unmap_single(pdev, buffer_info->dma,
 289                                          adapter->rx_ps_hdr_size + NET_IP_ALIGN,
 290                                          PCI_DMA_FROMDEVICE);
 291                         skb_put(skb, hlen);
 292                 }
 293
 294                 if (length) {
 295                         pci_unmap_page(pdev, buffer_info->page_dma,
 296                                        PAGE_SIZE / 2,
 297                                        PCI_DMA_FROMDEVICE);
 298                         buffer_info->page_dma = 0;
 299
 300                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags++,
 301                                            buffer_info->page,
 302                                            buffer_info->page_offset,
 303                                            length);
 304
 305                         if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
 306                             (page_count(buffer_info->page) != 1))
 307                                 buffer_info->page = NULL;
 308                         else
 309                                 get_page(buffer_info->page);
 310
 311                         skb->len += length;
 312                         skb->data_len += length;
 313                         skb->truesize += length;
 314                 }
 315 send_up:
 316                 i++;
 317                 if (i == rx_ring->count)
 318                         i = 0;
 319                 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
 320                 prefetch(next_rxd);
 321                 next_buffer = &rx_ring->buffer_info[i];
 322
 323                 if (!(staterr & E1000_RXD_STAT_EOP)) {
 324                         buffer_info->skb = next_buffer->skb;
 325                         buffer_info->dma = next_buffer->dma;
 326                         next_buffer->skb = skb;
 327                         next_buffer->dma = 0;
 328                         goto next_desc;
 329                 }
 330
 331                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 332                         dev_kfree_skb_irq(skb);
 333                         goto next_desc;
 334                 }
 335
 336                 total_bytes += skb->len;
 337                 total_packets++;
 338
 339                 igbvf_rx_checksum_adv(adapter, staterr, skb);
 340
 341                 skb->protocol = eth_type_trans(skb, netdev);
 342
 343                 igbvf_receive_skb(adapter, netdev, skb, staterr,
 344                                   rx_desc->wb.upper.vlan);
 345
 346                 netdev->last_rx = jiffies;
 347
 348 next_desc:
 349                 rx_desc->wb.upper.status_error = 0;
 350
 351                 /* return some buffers to hardware, one at a time is too slow */
 352                 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
 353                         igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
 354                         cleaned_count = 0;
 355                 }
 356
 357                 /* use prefetched values */
 358                 rx_desc = next_rxd;
 359                 buffer_info = next_buffer;
 360
 361                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 362         }
 363
 364         rx_ring->next_to_clean = i;
 365         cleaned_count = igbvf_desc_unused(rx_ring);
 366
 367         if (cleaned_count)
 368                 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
 369
 370         adapter->total_rx_packets += total_packets;
 371         adapter->total_rx_bytes += total_bytes;
 372         adapter->net_stats.rx_bytes += total_bytes;
 373         adapter->net_stats.rx_packets += total_packets;
 374         return cleaned;
 375 }
 376
 377 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
 378                             struct igbvf_buffer *buffer_info)
 379 {
 380         buffer_info->dma = 0;
 381         if (buffer_info->skb) {
 382                 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
 383                               DMA_TO_DEVICE);
 384                 dev_kfree_skb_any(buffer_info->skb);
 385                 buffer_info->skb = NULL;
 386         }
 387         buffer_info->time_stamp = 0;
 388 }
 389
 390 static void igbvf_print_tx_hang(struct igbvf_adapter *adapter)
 391 {
 392         struct igbvf_ring *tx_ring = adapter->tx_ring;
 393         unsigned int i = tx_ring->next_to_clean;
 394         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 395         union e1000_adv_tx_desc *eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
 396
 397         /* detected Tx unit hang */
 398         dev_err(&adapter->pdev->dev,
 399                 "Detected Tx Unit Hang:\n"
 400                 "  TDH                  <%x>\n"
 401                 "  TDT                  <%x>\n"
 402                 "  next_to_use          <%x>\n"
 403                 "  next_to_clean        <%x>\n"
 404                 "buffer_info[next_to_clean]:\n"
 405                 "  time_stamp           <%lx>\n"
 406                 "  next_to_watch        <%x>\n"
 407                 "  jiffies              <%lx>\n"
 408                 "  next_to_watch.status <%x>\n",
 409                 readl(adapter->hw.hw_addr + tx_ring->head),
 410                 readl(adapter->hw.hw_addr + tx_ring->tail),
 411                 tx_ring->next_to_use,
 412                 tx_ring->next_to_clean,
 413                 tx_ring->buffer_info[eop].time_stamp,
 414                 eop,
 415                 jiffies,
 416                 eop_desc->wb.status);
 417 }
 418
 419 /**
 420  * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
 421  * @adapter: board private structure
 422  *
 423  * Return 0 on success, negative on failure
 424  **/
 425 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
 426                              struct igbvf_ring *tx_ring)
 427 {
 428         struct pci_dev *pdev = adapter->pdev;
 429         int size;
 430
 431         size = sizeof(struct igbvf_buffer) * tx_ring->count;
 432         tx_ring->buffer_info = vmalloc(size);
 433         if (!tx_ring->buffer_info)
 434                 goto err;
 435         memset(tx_ring->buffer_info, 0, size);
 436
 437         /* round up to nearest 4K */
 438         tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
 439         tx_ring->size = ALIGN(tx_ring->size, 4096);
 440
 441         tx_ring->desc = pci_alloc_consistent(pdev, tx_ring->size,
 442                                              &tx_ring->dma);
 443
 444         if (!tx_ring->desc)
 445                 goto err;
 446
 447         tx_ring->adapter = adapter;
 448         tx_ring->next_to_use = 0;
 449         tx_ring->next_to_clean = 0;
 450
 451         return 0;
 452 err:
 453         vfree(tx_ring->buffer_info);
 454         dev_err(&adapter->pdev->dev,
 455                 "Unable to allocate memory for the transmit descriptor ring\n");
 456         return -ENOMEM;
 457 }
 458
 459 /**
 460  * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
 461  * @adapter: board private structure
 462  *
 463  * Returns 0 on success, negative on failure
 464  **/
 465 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
 466                              struct igbvf_ring *rx_ring)
 467 {
 468         struct pci_dev *pdev = adapter->pdev;
 469         int size, desc_len;
 470
 471         size = sizeof(struct igbvf_buffer) * rx_ring->count;
 472         rx_ring->buffer_info = vmalloc(size);
 473         if (!rx_ring->buffer_info)
 474                 goto err;
 475         memset(rx_ring->buffer_info, 0, size);
 476
 477         desc_len = sizeof(union e1000_adv_rx_desc);
 478
 479         /* Round up to nearest 4K */
 480         rx_ring->size = rx_ring->count * desc_len;
 481         rx_ring->size = ALIGN(rx_ring->size, 4096);
 482
 483         rx_ring->desc = pci_alloc_consistent(pdev, rx_ring->size,
 484                                              &rx_ring->dma);
 485
 486         if (!rx_ring->desc)
 487                 goto err;
 488
 489         rx_ring->next_to_clean = 0;
 490         rx_ring->next_to_use = 0;
 491
 492         rx_ring->adapter = adapter;
 493
 494         return 0;
 495
 496 err:
 497         vfree(rx_ring->buffer_info);
 498         rx_ring->buffer_info = NULL;
 499         dev_err(&adapter->pdev->dev,
 500                 "Unable to allocate memory for the receive descriptor ring\n");
 501         return -ENOMEM;
 502 }
 503
 504 /**
 505  * igbvf_clean_tx_ring - Free Tx Buffers
 506  * @tx_ring: ring to be cleaned
 507  **/
 508 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
 509 {
 510         struct igbvf_adapter *adapter = tx_ring->adapter;
 511         struct igbvf_buffer *buffer_info;
 512         unsigned long size;
 513         unsigned int i;
 514
 515         if (!tx_ring->buffer_info)
 516                 return;
 517
 518         /* Free all the Tx ring sk_buffs */
 519         for (i = 0; i < tx_ring->count; i++) {
 520                 buffer_info = &tx_ring->buffer_info[i];
 521                 igbvf_put_txbuf(adapter, buffer_info);
 522         }
 523
 524         size = sizeof(struct igbvf_buffer) * tx_ring->count;
 525         memset(tx_ring->buffer_info, 0, size);
 526
 527         /* Zero out the descriptor ring */
 528         memset(tx_ring->desc, 0, tx_ring->size);
 529
 530         tx_ring->next_to_use = 0;
 531         tx_ring->next_to_clean = 0;
 532
 533         writel(0, adapter->hw.hw_addr + tx_ring->head);
 534         writel(0, adapter->hw.hw_addr + tx_ring->tail);
 535 }
 536
 537 /**
 538  * igbvf_free_tx_resources - Free Tx Resources per Queue
 539  * @tx_ring: ring to free resources from
 540  *
 541  * Free all transmit software resources
 542  **/
 543 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
 544 {
 545         struct pci_dev *pdev = tx_ring->adapter->pdev;
 546
 547         igbvf_clean_tx_ring(tx_ring);
 548
 549         vfree(tx_ring->buffer_info);
 550         tx_ring->buffer_info = NULL;
 551
 552         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
 553
 554         tx_ring->desc = NULL;
 555 }
 556
 557 /**
 558  * igbvf_clean_rx_ring - Free Rx Buffers per Queue
 559  * @adapter: board private structure
 560  **/
 561 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
 562 {
 563         struct igbvf_adapter *adapter = rx_ring->adapter;
 564         struct igbvf_buffer *buffer_info;
 565         struct pci_dev *pdev = adapter->pdev;
 566         unsigned long size;
 567         unsigned int i;
 568
 569         if (!rx_ring->buffer_info)
 570                 return;
 571
 572         /* Free all the Rx ring sk_buffs */
 573         for (i = 0; i < rx_ring->count; i++) {
 574                 buffer_info = &rx_ring->buffer_info[i];
 575                 if (buffer_info->dma) {
 576                         if (adapter->rx_ps_hdr_size){
 577                                 pci_unmap_single(pdev, buffer_info->dma,
 578                                                  adapter->rx_ps_hdr_size,
 579                                                  PCI_DMA_FROMDEVICE);
 580                         } else {
 581                                 pci_unmap_single(pdev, buffer_info->dma,
 582                                                  adapter->rx_buffer_len,
 583                                                  PCI_DMA_FROMDEVICE);
 584                         }
 585                         buffer_info->dma = 0;
 586                 }
 587
 588                 if (buffer_info->skb) {
 589                         dev_kfree_skb(buffer_info->skb);
 590                         buffer_info->skb = NULL;
 591                 }
 592
 593                 if (buffer_info->page) {
 594                         if (buffer_info->page_dma)
 595                                 pci_unmap_page(pdev, buffer_info->page_dma,
 596                                                PAGE_SIZE / 2,
 597                                                PCI_DMA_FROMDEVICE);
 598                         put_page(buffer_info->page);
 599                         buffer_info->page = NULL;
 600                         buffer_info->page_dma = 0;
 601                         buffer_info->page_offset = 0;
 602                 }
 603         }
 604
 605         size = sizeof(struct igbvf_buffer) * rx_ring->count;
 606         memset(rx_ring->buffer_info, 0, size);
 607
 608         /* Zero out the descriptor ring */
 609         memset(rx_ring->desc, 0, rx_ring->size);
 610
 611         rx_ring->next_to_clean = 0;
 612         rx_ring->next_to_use = 0;
 613
 614         writel(0, adapter->hw.hw_addr + rx_ring->head);
 615         writel(0, adapter->hw.hw_addr + rx_ring->tail);
 616 }
 617
 618 /**
 619  * igbvf_free_rx_resources - Free Rx Resources
 620  * @rx_ring: ring to clean the resources from
 621  *
 622  * Free all receive software resources
 623  **/
 624
 625 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
 626 {
 627         struct pci_dev *pdev = rx_ring->adapter->pdev;
 628
 629         igbvf_clean_rx_ring(rx_ring);
 630
 631         vfree(rx_ring->buffer_info);
 632         rx_ring->buffer_info = NULL;
 633
 634         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
 635                           rx_ring->dma);
 636         rx_ring->desc = NULL;
 637 }
 638
 639 /**
 640  * igbvf_update_itr - update the dynamic ITR value based on statistics
 641  * @adapter: pointer to adapter
 642  * @itr_setting: current adapter->itr
 643  * @packets: the number of packets during this measurement interval
 644  * @bytes: the number of bytes during this measurement interval
 645  *
 646  *      Stores a new ITR value based on packets and byte
 647  *      counts during the last interrupt.  The advantage of per interrupt
 648  *      computation is faster updates and more accurate ITR for the current
 649  *      traffic pattern.  Constants in this function were computed
 650  *      based on theoretical maximum wire speed and thresholds were set based
 651  *      on testing data as well as attempting to minimize response time
 652  *      while increasing bulk throughput.  This functionality is controlled
 653  *      by the InterruptThrottleRate module parameter.
 654  **/
 655 static unsigned int igbvf_update_itr(struct igbvf_adapter *adapter,
 656                                      u16 itr_setting, int packets,
 657                                      int bytes)
 658 {
 659         unsigned int retval = itr_setting;
 660
 661         if (packets == 0)
 662                 goto update_itr_done;
 663
 664         switch (itr_setting) {
 665         case lowest_latency:
 666                 /* handle TSO and jumbo frames */
 667                 if (bytes/packets > 8000)
 668                         retval = bulk_latency;
 669                 else if ((packets < 5) && (bytes > 512))
 670                         retval = low_latency;
 671                 break;
 672         case low_latency:  /* 50 usec aka 20000 ints/s */
 673                 if (bytes > 10000) {
 674                         /* this if handles the TSO accounting */
 675                         if (bytes/packets > 8000)
 676                                 retval = bulk_latency;
 677                         else if ((packets < 10) || ((bytes/packets) > 1200))
 678                                 retval = bulk_latency;
 679                         else if ((packets > 35))
 680                                 retval = lowest_latency;
 681                 } else if (bytes/packets > 2000) {
 682                         retval = bulk_latency;
 683                 } else if (packets <= 2 && bytes < 512) {
 684                         retval = lowest_latency;
 685                 }
 686                 break;
 687         case bulk_latency: /* 250 usec aka 4000 ints/s */
 688                 if (bytes > 25000) {
 689                         if (packets > 35)
 690                                 retval = low_latency;
 691                 } else if (bytes < 6000) {
 692                         retval = low_latency;
 693                 }
 694                 break;
 695         }
 696
 697 update_itr_done:
 698         return retval;
 699 }
 700
 701 static void igbvf_set_itr(struct igbvf_adapter *adapter)
 702 {
 703         struct e1000_hw *hw = &adapter->hw;
 704         u16 current_itr;
 705         u32 new_itr = adapter->itr;
 706
 707         adapter->tx_itr = igbvf_update_itr(adapter, adapter->tx_itr,
 708                                            adapter->total_tx_packets,
 709                                            adapter->total_tx_bytes);
 710         /* conservative mode (itr 3) eliminates the lowest_latency setting */
 711         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
 712                 adapter->tx_itr = low_latency;
 713
 714         adapter->rx_itr = igbvf_update_itr(adapter, adapter->rx_itr,
 715                                            adapter->total_rx_packets,
 716                                            adapter->total_rx_bytes);
 717         /* conservative mode (itr 3) eliminates the lowest_latency setting */
 718         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
 719                 adapter->rx_itr = low_latency;
 720
 721         current_itr = max(adapter->rx_itr, adapter->tx_itr);
 722
 723         switch (current_itr) {
 724         /* counts and packets in update_itr are dependent on these numbers */
 725         case lowest_latency:
 726                 new_itr = 70000;
 727                 break;
 728         case low_latency:
 729                 new_itr = 20000; /* aka hwitr = ~200 */
 730                 break;
 731         case bulk_latency:
 732                 new_itr = 4000;
 733                 break;
 734         default:
 735                 break;
 736         }
 737
 738         if (new_itr != adapter->itr) {
 739                 /*
 740                  * this attempts to bias the interrupt rate towards Bulk
 741                  * by adding intermediate steps when interrupt rate is
 742                  * increasing
 743                  */
 744                 new_itr = new_itr > adapter->itr ?
 745                              min(adapter->itr + (new_itr >> 2), new_itr) :
 746                              new_itr;
 747                 adapter->itr = new_itr;
 748                 adapter->rx_ring->itr_val = 1952;
 749
 750                 if (adapter->msix_entries)
 751                         adapter->rx_ring->set_itr = 1;
 752                 else
 753                         ew32(ITR, 1952);
 754         }
 755 }
 756
 757 /**
 758  * igbvf_clean_tx_irq - Reclaim resources after transmit completes
 759  * @adapter: board private structure
 760  * returns true if ring is completely cleaned
 761  **/
 762 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
 763 {
 764         struct igbvf_adapter *adapter = tx_ring->adapter;
 765         struct e1000_hw *hw = &adapter->hw;
 766         struct net_device *netdev = adapter->netdev;
 767         struct igbvf_buffer *buffer_info;
 768         struct sk_buff *skb;
 769         union e1000_adv_tx_desc *tx_desc, *eop_desc;
 770         unsigned int total_bytes = 0, total_packets = 0;
 771         unsigned int i, eop, count = 0;
 772         bool cleaned = false;
 773
 774         i = tx_ring->next_to_clean;
 775         eop = tx_ring->buffer_info[i].next_to_watch;
 776         eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
 777
 778         while ((eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)) &&
 779                (count < tx_ring->count)) {
 780                 for (cleaned = false; !cleaned; count++) {
 781                         tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
 782                         buffer_info = &tx_ring->buffer_info[i];
 783                         cleaned = (i == eop);
 784                         skb = buffer_info->skb;
 785
 786                         if (skb) {
 787                                 unsigned int segs, bytecount;
 788
 789                                 /* gso_segs is currently only valid for tcp */
 790                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 791                                 /* multiply data chunks by size of headers */
 792                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 793                                             skb->len;
 794                                 total_packets += segs;
 795                                 total_bytes += bytecount;
 796                         }
 797
 798                         igbvf_put_txbuf(adapter, buffer_info);
 799                         tx_desc->wb.status = 0;
 800
 801                         i++;
 802                         if (i == tx_ring->count)
 803                                 i = 0;
 804                 }
 805                 eop = tx_ring->buffer_info[i].next_to_watch;
 806                 eop_desc = IGBVF_TX_DESC_ADV(*tx_ring, eop);
 807         }
 808
 809         tx_ring->next_to_clean = i;
 810
 811         if (unlikely(count &&
 812                      netif_carrier_ok(netdev) &&
 813                      igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
 814                 /* Make sure that anybody stopping the queue after this
 815                  * sees the new next_to_clean.
 816                  */
 817                 smp_mb();
 818                 if (netif_queue_stopped(netdev) &&
 819                     !(test_bit(__IGBVF_DOWN, &adapter->state))) {
 820                         netif_wake_queue(netdev);
 821                         ++adapter->restart_queue;
 822                 }
 823         }
 824
 825         if (adapter->detect_tx_hung) {
 826                 /* Detect a transmit hang in hardware, this serializes the
 827                  * check with the clearing of time_stamp and movement of i */
 828                 adapter->detect_tx_hung = false;
 829                 if (tx_ring->buffer_info[i].time_stamp &&
 830                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp +
 831                                (adapter->tx_timeout_factor * HZ))
 832                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
 833
 834                         tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
 835                         /* detected Tx unit hang */
 836                         igbvf_print_tx_hang(adapter);
 837
 838                         netif_stop_queue(netdev);
 839                 }
 840         }
 841         adapter->net_stats.tx_bytes += total_bytes;
 842         adapter->net_stats.tx_packets += total_packets;
 843         return (count < tx_ring->count);
 844 }
 845
 846 static irqreturn_t igbvf_msix_other(int irq, void *data)
 847 {
 848         struct net_device *netdev = data;
 849         struct igbvf_adapter *adapter = netdev_priv(netdev);
 850         struct e1000_hw *hw = &adapter->hw;
 851
 852         adapter->int_counter1++;
 853
 854         netif_carrier_off(netdev);
 855         hw->mac.get_link_status = 1;
 856         if (!test_bit(__IGBVF_DOWN, &adapter->state))
 857                 mod_timer(&adapter->watchdog_timer, jiffies + 1);
 858
 859         ew32(EIMS, adapter->eims_other);
 860
 861         return IRQ_HANDLED;
 862 }
 863
 864 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
 865 {
 866         struct net_device *netdev = data;
 867         struct igbvf_adapter *adapter = netdev_priv(netdev);
 868         struct e1000_hw *hw = &adapter->hw;
 869         struct igbvf_ring *tx_ring = adapter->tx_ring;
 870
 871
 872         adapter->total_tx_bytes = 0;
 873         adapter->total_tx_packets = 0;
 874
 875         /* auto mask will automatically reenable the interrupt when we write
 876          * EICS */
 877         if (!igbvf_clean_tx_irq(tx_ring))
 878                 /* Ring was not completely cleaned, so fire another interrupt */
 879                 ew32(EICS, tx_ring->eims_value);
 880         else
 881                 ew32(EIMS, tx_ring->eims_value);
 882
 883         return IRQ_HANDLED;
 884 }
 885
 886 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
 887 {
 888         struct net_device *netdev = data;
 889         struct igbvf_adapter *adapter = netdev_priv(netdev);
 890
 891         adapter->int_counter0++;
 892
 893         /* Write the ITR value calculated at the end of the
 894          * previous interrupt.
 895          */
 896         if (adapter->rx_ring->set_itr) {
 897                 writel(adapter->rx_ring->itr_val,
 898                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
 899                 adapter->rx_ring->set_itr = 0;
 900         }
 901
 902         if (napi_schedule_prep(&adapter->rx_ring->napi)) {
 903                 adapter->total_rx_bytes = 0;
 904                 adapter->total_rx_packets = 0;
 905                 __napi_schedule(&adapter->rx_ring->napi);
 906         }
 907
 908         return IRQ_HANDLED;
 909 }
 910
 911 #define IGBVF_NO_QUEUE -1
 912
 913 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
 914                                 int tx_queue, int msix_vector)
 915 {
 916         struct e1000_hw *hw = &adapter->hw;
 917         u32 ivar, index;
 918
 919         /* 82576 uses a table-based method for assigning vectors.
 920            Each queue has a single entry in the table to which we write
 921            a vector number along with a "valid" bit.  Sadly, the layout
 922            of the table is somewhat counterintuitive. */
 923         if (rx_queue > IGBVF_NO_QUEUE) {
 924                 index = (rx_queue >> 1);
 925                 ivar = array_er32(IVAR0, index);
 926                 if (rx_queue & 0x1) {
 927                         /* vector goes into third byte of register */
 928                         ivar = ivar & 0xFF00FFFF;
 929                         ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
 930                 } else {
 931                         /* vector goes into low byte of register */
 932                         ivar = ivar & 0xFFFFFF00;
 933                         ivar |= msix_vector | E1000_IVAR_VALID;
 934                 }
 935                 adapter->rx_ring[rx_queue].eims_value = 1 << msix_vector;
 936                 array_ew32(IVAR0, index, ivar);
 937         }
 938         if (tx_queue > IGBVF_NO_QUEUE) {
 939                 index = (tx_queue >> 1);
 940                 ivar = array_er32(IVAR0, index);
 941                 if (tx_queue & 0x1) {
 942                         /* vector goes into high byte of register */
 943                         ivar = ivar & 0x00FFFFFF;
 944                         ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
 945                 } else {
 946                         /* vector goes into second byte of register */
 947                         ivar = ivar & 0xFFFF00FF;
 948                         ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
 949                 }
 950                 adapter->tx_ring[tx_queue].eims_value = 1 << msix_vector;
 951                 array_ew32(IVAR0, index, ivar);
 952         }
 953 }
 954
 955 /**
 956  * igbvf_configure_msix - Configure MSI-X hardware
 957  *
 958  * igbvf_configure_msix sets up the hardware to properly
 959  * generate MSI-X interrupts.
 960  **/
 961 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
 962 {
 963         u32 tmp;
 964         struct e1000_hw *hw = &adapter->hw;
 965         struct igbvf_ring *tx_ring = adapter->tx_ring;
 966         struct igbvf_ring *rx_ring = adapter->rx_ring;
 967         int vector = 0;
 968
 969         adapter->eims_enable_mask = 0;
 970
 971         igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
 972         adapter->eims_enable_mask |= tx_ring->eims_value;
 973         if (tx_ring->itr_val)
 974                 writel(tx_ring->itr_val,
 975                        hw->hw_addr + tx_ring->itr_register);
 976         else
 977                 writel(1952, hw->hw_addr + tx_ring->itr_register);
 978
 979         igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
 980         adapter->eims_enable_mask |= rx_ring->eims_value;
 981         if (rx_ring->itr_val)
 982                 writel(rx_ring->itr_val,
 983                        hw->hw_addr + rx_ring->itr_register);
 984         else
 985                 writel(1952, hw->hw_addr + rx_ring->itr_register);
 986
 987         /* set vector for other causes, i.e. link changes */
 988
 989         tmp = (vector++ | E1000_IVAR_VALID);
 990
 991         ew32(IVAR_MISC, tmp);
 992
 993         adapter->eims_enable_mask = (1 << (vector)) - 1;
 994         adapter->eims_other = 1 << (vector - 1);
 995         e1e_flush();
 996 }
 997
 998 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
 999 {
1000         if (adapter->msix_entries) {
1001                 pci_disable_msix(adapter->pdev);
1002                 kfree(adapter->msix_entries);
1003                 adapter->msix_entries = NULL;
1004         }
1005 }
1006
1007 /**
1008  * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1009  *
1010  * Attempt to configure interrupts using the best available
1011  * capabilities of the hardware and kernel.
1012  **/
1013 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1014 {
1015         int err = -ENOMEM;
1016         int i;
1017
1018         /* we allocate 3 vectors, 1 for tx, 1 for rx, one for pf messages */
1019         adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1020                                         GFP_KERNEL);
1021         if (adapter->msix_entries) {
1022                 for (i = 0; i < 3; i++)
1023                         adapter->msix_entries[i].entry = i;
1024
1025                 err = pci_enable_msix(adapter->pdev,
1026                                       adapter->msix_entries, 3);
1027         }
1028
1029         if (err) {
1030                 /* MSI-X failed */
1031                 dev_err(&adapter->pdev->dev,
1032                         "Failed to initialize MSI-X interrupts.\n");
1033                 igbvf_reset_interrupt_capability(adapter);
1034         }
1035 }
1036
1037 /**
1038  * igbvf_request_msix - Initialize MSI-X interrupts
1039  *
1040  * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1041  * kernel.
1042  **/
1043 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1044 {
1045         struct net_device *netdev = adapter->netdev;
1046         int err = 0, vector = 0;
1047
1048         if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1049                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1050                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1051         } else {
1052                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1053                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1054         }
1055
1056         err = request_irq(adapter->msix_entries[vector].vector,
1057                           &igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1058                           netdev);
1059         if (err)
1060                 goto out;
1061
1062         adapter->tx_ring->itr_register = E1000_EITR(vector);
1063         adapter->tx_ring->itr_val = 1952;
1064         vector++;
1065
1066         err = request_irq(adapter->msix_entries[vector].vector,
1067                           &igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1068                           netdev);
1069         if (err)
1070                 goto out;
1071
1072         adapter->rx_ring->itr_register = E1000_EITR(vector);
1073         adapter->rx_ring->itr_val = 1952;
1074         vector++;
1075
1076         err = request_irq(adapter->msix_entries[vector].vector,
1077                           &igbvf_msix_other, 0, netdev->name, netdev);
1078         if (err)
1079                 goto out;
1080
1081         igbvf_configure_msix(adapter);
1082         return 0;
1083 out:
1084         return err;
1085 }
1086
1087 /**
1088  * igbvf_alloc_queues - Allocate memory for all rings
1089  * @adapter: board private structure to initialize
1090  **/
1091 static int __devinit igbvf_alloc_queues(struct igbvf_adapter *adapter)
1092 {
1093         struct net_device *netdev = adapter->netdev;
1094
1095         adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1096         if (!adapter->tx_ring)
1097                 return -ENOMEM;
1098
1099         adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1100         if (!adapter->rx_ring) {
1101                 kfree(adapter->tx_ring);
1102                 return -ENOMEM;
1103         }
1104
1105         netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1106
1107         return 0;
1108 }
1109
1110 /**
1111  * igbvf_request_irq - initialize interrupts
1112  *
1113  * Attempts to configure interrupts using the best available
1114  * capabilities of the hardware and kernel.
1115  **/
1116 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1117 {
1118         int err = -1;
1119
1120         /* igbvf supports msi-x only */
1121         if (adapter->msix_entries)
1122                 err = igbvf_request_msix(adapter);
1123
1124         if (!err)
1125                 return err;
1126
1127         dev_err(&adapter->pdev->dev,
1128                 "Unable to allocate interrupt, Error: %d\n", err);
1129
1130         return err;
1131 }
1132
1133 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1134 {
1135         struct net_device *netdev = adapter->netdev;
1136         int vector;
1137
1138         if (adapter->msix_entries) {
1139                 for (vector = 0; vector < 3; vector++)
1140                         free_irq(adapter->msix_entries[vector].vector, netdev);
1141         }
1142 }
1143
1144 /**
1145  * igbvf_irq_disable - Mask off interrupt generation on the NIC
1146  **/
1147 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1148 {
1149         struct e1000_hw *hw = &adapter->hw;
1150
1151         ew32(EIMC, ~0);
1152
1153         if (adapter->msix_entries)
1154                 ew32(EIAC, 0);
1155 }
1156
1157 /**
1158  * igbvf_irq_enable - Enable default interrupt generation settings
1159  **/
1160 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1161 {
1162         struct e1000_hw *hw = &adapter->hw;
1163
1164         ew32(EIAC, adapter->eims_enable_mask);
1165         ew32(EIAM, adapter->eims_enable_mask);
1166         ew32(EIMS, adapter->eims_enable_mask);
1167 }
1168
1169 /**
1170  * igbvf_poll - NAPI Rx polling callback
1171  * @napi: struct associated with this polling callback
1172  * @budget: amount of packets driver is allowed to process this poll
1173  **/
1174 static int igbvf_poll(struct napi_struct *napi, int budget)
1175 {
1176         struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1177         struct igbvf_adapter *adapter = rx_ring->adapter;
1178         struct e1000_hw *hw = &adapter->hw;
1179         int work_done = 0;
1180
1181         igbvf_clean_rx_irq(adapter, &work_done, budget);
1182
1183         /* If not enough Rx work done, exit the polling mode */
1184         if (work_done < budget) {
1185                 napi_complete(napi);
1186
1187                 if (adapter->itr_setting & 3)
1188                         igbvf_set_itr(adapter);
1189
1190                 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1191                         ew32(EIMS, adapter->rx_ring->eims_value);
1192         }
1193
1194         return work_done;
1195 }
1196
1197 /**
1198  * igbvf_set_rlpml - set receive large packet maximum length
1199  * @adapter: board private structure
1200  *
1201  * Configure the maximum size of packets that will be received
1202  */
1203 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1204 {
1205         int max_frame_size = adapter->max_frame_size;
1206         struct e1000_hw *hw = &adapter->hw;
1207
1208         if (adapter->vlgrp)
1209                 max_frame_size += VLAN_TAG_SIZE;
1210
1211         e1000_rlpml_set_vf(hw, max_frame_size);
1212 }
1213
1214 static void igbvf_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1215 {
1216         struct igbvf_adapter *adapter = netdev_priv(netdev);
1217         struct e1000_hw *hw = &adapter->hw;
1218
1219         if (hw->mac.ops.set_vfta(hw, vid, true))
1220                 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1221 }
1222
1223 static void igbvf_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1224 {
1225         struct igbvf_adapter *adapter = netdev_priv(netdev);
1226         struct e1000_hw *hw = &adapter->hw;
1227
1228         igbvf_irq_disable(adapter);
1229         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1230
1231         if (!test_bit(__IGBVF_DOWN, &adapter->state))
1232                 igbvf_irq_enable(adapter);
1233
1234         if (hw->mac.ops.set_vfta(hw, vid, false))
1235                 dev_err(&adapter->pdev->dev,
1236                         "Failed to remove vlan id %d\n", vid);
1237 }
1238
1239 static void igbvf_vlan_rx_register(struct net_device *netdev,
1240                                    struct vlan_group *grp)
1241 {
1242         struct igbvf_adapter *adapter = netdev_priv(netdev);
1243
1244         adapter->vlgrp = grp;
1245 }
1246
1247 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1248 {
1249         u16 vid;
1250
1251         if (!adapter->vlgrp)
1252                 return;
1253
1254         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1255                 if (!vlan_group_get_device(adapter->vlgrp, vid))
1256                         continue;
1257                 igbvf_vlan_rx_add_vid(adapter->netdev, vid);
1258         }
1259
1260         igbvf_set_rlpml(adapter);
1261 }
1262
1263 /**
1264  * igbvf_configure_tx - Configure Transmit Unit after Reset
1265  * @adapter: board private structure
1266  *
1267  * Configure the Tx unit of the MAC after a reset.
1268  **/
1269 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1270 {
1271         struct e1000_hw *hw = &adapter->hw;
1272         struct igbvf_ring *tx_ring = adapter->tx_ring;
1273         u64 tdba;
1274         u32 txdctl, dca_txctrl;
1275
1276         /* disable transmits */
1277         txdctl = er32(TXDCTL(0));
1278         ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1279         msleep(10);
1280
1281         /* Setup the HW Tx Head and Tail descriptor pointers */
1282         ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1283         tdba = tx_ring->dma;
1284         ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1285         ew32(TDBAH(0), (tdba >> 32));
1286         ew32(TDH(0), 0);
1287         ew32(TDT(0), 0);
1288         tx_ring->head = E1000_TDH(0);
1289         tx_ring->tail = E1000_TDT(0);
1290
1291         /* Turn off Relaxed Ordering on head write-backs.  The writebacks
1292          * MUST be delivered in order or it will completely screw up
1293          * our bookeeping.
1294          */
1295         dca_txctrl = er32(DCA_TXCTRL(0));
1296         dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1297         ew32(DCA_TXCTRL(0), dca_txctrl);
1298
1299         /* enable transmits */
1300         txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1301         ew32(TXDCTL(0), txdctl);
1302
1303         /* Setup Transmit Descriptor Settings for eop descriptor */
1304         adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1305
1306         /* enable Report Status bit */
1307         adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1308
1309         adapter->tx_queue_len = adapter->netdev->tx_queue_len;
1310 }
1311
1312 /**
1313  * igbvf_setup_srrctl - configure the receive control registers
1314  * @adapter: Board private structure
1315  **/
1316 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1317 {
1318         struct e1000_hw *hw = &adapter->hw;
1319         u32 srrctl = 0;
1320
1321         srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1322                     E1000_SRRCTL_BSIZEHDR_MASK |
1323                     E1000_SRRCTL_BSIZEPKT_MASK);
1324
1325         /* Enable queue drop to avoid head of line blocking */
1326         srrctl |= E1000_SRRCTL_DROP_EN;
1327
1328         /* Setup buffer sizes */
1329         srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1330                   E1000_SRRCTL_BSIZEPKT_SHIFT;
1331
1332         if (adapter->rx_buffer_len < 2048) {
1333                 adapter->rx_ps_hdr_size = 0;
1334                 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1335         } else {
1336                 adapter->rx_ps_hdr_size = 128;
1337                 srrctl |= adapter->rx_ps_hdr_size <<
1338                           E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1339                 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1340         }
1341
1342         ew32(SRRCTL(0), srrctl);
1343 }
1344
1345 /**
1346  * igbvf_configure_rx - Configure Receive Unit after Reset
1347  * @adapter: board private structure
1348  *
1349  * Configure the Rx unit of the MAC after a reset.
1350  **/
1351 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1352 {
1353         struct e1000_hw *hw = &adapter->hw;
1354         struct igbvf_ring *rx_ring = adapter->rx_ring;
1355         u64 rdba;
1356         u32 rdlen, rxdctl;
1357
1358         /* disable receives */
1359         rxdctl = er32(RXDCTL(0));
1360         ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1361         msleep(10);
1362
1363         rdlen = rx_ring->count * sizeof(union e1000_adv_rx_desc);
1364
1365         /*
1366          * Setup the HW Rx Head and Tail Descriptor Pointers and
1367          * the Base and Length of the Rx Descriptor Ring
1368          */
1369         rdba = rx_ring->dma;
1370         ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1371         ew32(RDBAH(0), (rdba >> 32));
1372         ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1373         rx_ring->head = E1000_RDH(0);
1374         rx_ring->tail = E1000_RDT(0);
1375         ew32(RDH(0), 0);
1376         ew32(RDT(0), 0);
1377
1378         rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1379         rxdctl &= 0xFFF00000;
1380         rxdctl |= IGBVF_RX_PTHRESH;
1381         rxdctl |= IGBVF_RX_HTHRESH << 8;
1382         rxdctl |= IGBVF_RX_WTHRESH << 16;
1383
1384         igbvf_set_rlpml(adapter);
1385
1386         /* enable receives */
1387         ew32(RXDCTL(0), rxdctl);
1388 }
1389
1390 /**
1391  * igbvf_set_multi - Multicast and Promiscuous mode set
1392  * @netdev: network interface device structure
1393  *
1394  * The set_multi entry point is called whenever the multicast address
1395  * list or the network interface flags are updated.  This routine is
1396  * responsible for configuring the hardware for proper multicast,
1397  * promiscuous mode, and all-multi behavior.
1398  **/
1399 static void igbvf_set_multi(struct net_device *netdev)
1400 {
1401         struct igbvf_adapter *adapter = netdev_priv(netdev);
1402         struct e1000_hw *hw = &adapter->hw;
1403         struct dev_mc_list *mc_ptr;
1404         u8  *mta_list = NULL;
1405         int i;
1406
1407         if (netdev->mc_count) {
1408                 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
1409                 if (!mta_list) {
1410                         dev_err(&adapter->pdev->dev,
1411                                 "failed to allocate multicast filter list\n");
1412                         return;
1413                 }
1414         }
1415
1416         /* prepare a packed array of only addresses. */
1417         mc_ptr = netdev->mc_list;
1418
1419         for (i = 0; i < netdev->mc_count; i++) {
1420                 if (!mc_ptr)
1421                         break;
1422                 memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
1423                        ETH_ALEN);
1424                 mc_ptr = mc_ptr->next;
1425         }
1426
1427         hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1428         kfree(mta_list);
1429 }
1430
1431 /**
1432  * igbvf_configure - configure the hardware for Rx and Tx
1433  * @adapter: private board structure
1434  **/
1435 static void igbvf_configure(struct igbvf_adapter *adapter)
1436 {
1437         igbvf_set_multi(adapter->netdev);
1438
1439         igbvf_restore_vlan(adapter);
1440
1441         igbvf_configure_tx(adapter);
1442         igbvf_setup_srrctl(adapter);
1443         igbvf_configure_rx(adapter);
1444         igbvf_alloc_rx_buffers(adapter->rx_ring,
1445                                igbvf_desc_unused(adapter->rx_ring));
1446 }
1447
1448 /* igbvf_reset - bring the hardware into a known good state
1449  *
1450  * This function boots the hardware and enables some settings that
1451  * require a configuration cycle of the hardware - those cannot be
1452  * set/changed during runtime. After reset the device needs to be
1453  * properly configured for Rx, Tx etc.
1454  */
1455 static void igbvf_reset(struct igbvf_adapter *adapter)
1456 {
1457         struct e1000_mac_info *mac = &adapter->hw.mac;
1458         struct net_device *netdev = adapter->netdev;
1459         struct e1000_hw *hw = &adapter->hw;
1460
1461         /* Allow time for pending master requests to run */
1462         if (mac->ops.reset_hw(hw))
1463                 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1464
1465         mac->ops.init_hw(hw);
1466
1467         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1468                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1469                        netdev->addr_len);
1470                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1471                        netdev->addr_len);
1472         }
1473 }
1474
1475 int igbvf_up(struct igbvf_adapter *adapter)
1476 {
1477         struct e1000_hw *hw = &adapter->hw;
1478
1479         /* hardware has been reset, we need to reload some things */
1480         igbvf_configure(adapter);
1481
1482         clear_bit(__IGBVF_DOWN, &adapter->state);
1483
1484         napi_enable(&adapter->rx_ring->napi);
1485         if (adapter->msix_entries)
1486                 igbvf_configure_msix(adapter);
1487
1488         /* Clear any pending interrupts. */
1489         er32(EICR);
1490         igbvf_irq_enable(adapter);
1491
1492         /* start the watchdog */
1493         hw->mac.get_link_status = 1;
1494         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1495
1496
1497         return 0;
1498 }
1499
1500 void igbvf_down(struct igbvf_adapter *adapter)
1501 {
1502         struct net_device *netdev = adapter->netdev;
1503         struct e1000_hw *hw = &adapter->hw;
1504         u32 rxdctl, txdctl;
1505
1506         /*
1507          * signal that we're down so the interrupt handler does not
1508          * reschedule our watchdog timer
1509          */
1510         set_bit(__IGBVF_DOWN, &adapter->state);
1511
1512         /* disable receives in the hardware */
1513         rxdctl = er32(RXDCTL(0));
1514         ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1515
1516         netif_stop_queue(netdev);
1517
1518         /* disable transmits in the hardware */
1519         txdctl = er32(TXDCTL(0));
1520         ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1521
1522         /* flush both disables and wait for them to finish */
1523         e1e_flush();
1524         msleep(10);
1525
1526         napi_disable(&adapter->rx_ring->napi);
1527
1528         igbvf_irq_disable(adapter);
1529
1530         del_timer_sync(&adapter->watchdog_timer);
1531
1532         netdev->tx_queue_len = adapter->tx_queue_len;
1533         netif_carrier_off(netdev);
1534
1535         /* record the stats before reset*/
1536         igbvf_update_stats(adapter);
1537
1538         adapter->link_speed = 0;
1539         adapter->link_duplex = 0;
1540
1541         igbvf_reset(adapter);
1542         igbvf_clean_tx_ring(adapter->tx_ring);
1543         igbvf_clean_rx_ring(adapter->rx_ring);
1544 }
1545
1546 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1547 {
1548         might_sleep();
1549         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1550                 msleep(1);
1551         igbvf_down(adapter);
1552         igbvf_up(adapter);
1553         clear_bit(__IGBVF_RESETTING, &adapter->state);
1554 }
1555
1556 /**
1557  * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1558  * @adapter: board private structure to initialize
1559  *
1560  * igbvf_sw_init initializes the Adapter private data structure.
1561  * Fields are initialized based on PCI device information and
1562  * OS network device settings (MTU size).
1563  **/
1564 static int __devinit igbvf_sw_init(struct igbvf_adapter *adapter)
1565 {
1566         struct net_device *netdev = adapter->netdev;
1567         s32 rc;
1568
1569         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1570         adapter->rx_ps_hdr_size = 0;
1571         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1572         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1573
1574         adapter->tx_int_delay = 8;
1575         adapter->tx_abs_int_delay = 32;
1576         adapter->rx_int_delay = 0;
1577         adapter->rx_abs_int_delay = 8;
1578         adapter->itr_setting = 3;
1579         adapter->itr = 20000;
1580
1581         /* Set various function pointers */
1582         adapter->ei->init_ops(&adapter->hw);
1583
1584         rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1585         if (rc)
1586                 return rc;
1587
1588         rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1589         if (rc)
1590                 return rc;
1591
1592         igbvf_set_interrupt_capability(adapter);
1593
1594         if (igbvf_alloc_queues(adapter))
1595                 return -ENOMEM;
1596
1597         spin_lock_init(&adapter->tx_queue_lock);
1598
1599         /* Explicitly disable IRQ since the NIC can be in any state. */
1600         igbvf_irq_disable(adapter);
1601
1602         spin_lock_init(&adapter->stats_lock);
1603
1604         set_bit(__IGBVF_DOWN, &adapter->state);
1605         return 0;
1606 }
1607
1608 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1609 {
1610         struct e1000_hw *hw = &adapter->hw;
1611
1612         adapter->stats.last_gprc = er32(VFGPRC);
1613         adapter->stats.last_gorc = er32(VFGORC);
1614         adapter->stats.last_gptc = er32(VFGPTC);
1615         adapter->stats.last_gotc = er32(VFGOTC);
1616         adapter->stats.last_mprc = er32(VFMPRC);
1617         adapter->stats.last_gotlbc = er32(VFGOTLBC);
1618         adapter->stats.last_gptlbc = er32(VFGPTLBC);
1619         adapter->stats.last_gorlbc = er32(VFGORLBC);
1620         adapter->stats.last_gprlbc = er32(VFGPRLBC);
1621
1622         adapter->stats.base_gprc = er32(VFGPRC);
1623         adapter->stats.base_gorc = er32(VFGORC);
1624         adapter->stats.base_gptc = er32(VFGPTC);
1625         adapter->stats.base_gotc = er32(VFGOTC);
1626         adapter->stats.base_mprc = er32(VFMPRC);
1627         adapter->stats.base_gotlbc = er32(VFGOTLBC);
1628         adapter->stats.base_gptlbc = er32(VFGPTLBC);
1629         adapter->stats.base_gorlbc = er32(VFGORLBC);
1630         adapter->stats.base_gprlbc = er32(VFGPRLBC);
1631 }
1632
1633 /**
1634  * igbvf_open - Called when a network interface is made active
1635  * @netdev: network interface device structure
1636  *
1637  * Returns 0 on success, negative value on failure
1638  *
1639  * The open entry point is called when a network interface is made
1640  * active by the system (IFF_UP).  At this point all resources needed
1641  * for transmit and receive operations are allocated, the interrupt
1642  * handler is registered with the OS, the watchdog timer is started,
1643  * and the stack is notified that the interface is ready.
1644  **/
1645 static int igbvf_open(struct net_device *netdev)
1646 {
1647         struct igbvf_adapter *adapter = netdev_priv(netdev);
1648         struct e1000_hw *hw = &adapter->hw;
1649         int err;
1650
1651         /* disallow open during test */
1652         if (test_bit(__IGBVF_TESTING, &adapter->state))
1653                 return -EBUSY;
1654
1655         /* allocate transmit descriptors */
1656         err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1657         if (err)
1658                 goto err_setup_tx;
1659
1660         /* allocate receive descriptors */
1661         err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1662         if (err)
1663                 goto err_setup_rx;
1664
1665         /*
1666          * before we allocate an interrupt, we must be ready to handle it.
1667          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1668          * as soon as we call pci_request_irq, so we have to setup our
1669          * clean_rx handler before we do so.
1670          */
1671         igbvf_configure(adapter);
1672
1673         err = igbvf_request_irq(adapter);
1674         if (err)
1675                 goto err_req_irq;
1676
1677         /* From here on the code is the same as igbvf_up() */
1678         clear_bit(__IGBVF_DOWN, &adapter->state);
1679
1680         napi_enable(&adapter->rx_ring->napi);
1681
1682         /* clear any pending interrupts */
1683         er32(EICR);
1684
1685         igbvf_irq_enable(adapter);
1686
1687         /* start the watchdog */
1688         hw->mac.get_link_status = 1;
1689         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1690
1691         return 0;
1692
1693 err_req_irq:
1694         igbvf_free_rx_resources(adapter->rx_ring);
1695 err_setup_rx:
1696         igbvf_free_tx_resources(adapter->tx_ring);
1697 err_setup_tx:
1698         igbvf_reset(adapter);
1699
1700         return err;
1701 }
1702
1703 /**
1704  * igbvf_close - Disables a network interface
1705  * @netdev: network interface device structure
1706  *
1707  * Returns 0, this is not allowed to fail
1708  *
1709  * The close entry point is called when an interface is de-activated
1710  * by the OS.  The hardware is still under the drivers control, but
1711  * needs to be disabled.  A global MAC reset is issued to stop the
1712  * hardware, and all transmit and receive resources are freed.
1713  **/
1714 static int igbvf_close(struct net_device *netdev)
1715 {
1716         struct igbvf_adapter *adapter = netdev_priv(netdev);
1717
1718         WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1719         igbvf_down(adapter);
1720
1721         igbvf_free_irq(adapter);
1722
1723         igbvf_free_tx_resources(adapter->tx_ring);
1724         igbvf_free_rx_resources(adapter->rx_ring);
1725
1726         return 0;
1727 }
1728 /**
1729  * igbvf_set_mac - Change the Ethernet Address of the NIC
1730  * @netdev: network interface device structure
1731  * @p: pointer to an address structure
1732  *
1733  * Returns 0 on success, negative on failure
1734  **/
1735 static int igbvf_set_mac(struct net_device *netdev, void *p)
1736 {
1737         struct igbvf_adapter *adapter = netdev_priv(netdev);
1738         struct e1000_hw *hw = &adapter->hw;
1739         struct sockaddr *addr = p;
1740
1741         if (!is_valid_ether_addr(addr->sa_data))
1742                 return -EADDRNOTAVAIL;
1743
1744         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1745
1746         hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1747
1748         if (memcmp(addr->sa_data, hw->mac.addr, 6))
1749                 return -EADDRNOTAVAIL;
1750
1751         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1752
1753         return 0;
1754 }
1755
1756 #define UPDATE_VF_COUNTER(reg, name)                                    \
1757         {                                                               \
1758                 u32 current_counter = er32(reg);                        \
1759                 if (current_counter < adapter->stats.last_##name)       \
1760                         adapter->stats.name += 0x100000000LL;           \
1761                 adapter->stats.last_##name = current_counter;           \
1762                 adapter->stats.name &= 0xFFFFFFFF00000000LL;            \
1763                 adapter->stats.name |= current_counter;                 \
1764         }
1765
1766 /**
1767  * igbvf_update_stats - Update the board statistics counters
1768  * @adapter: board private structure
1769 **/
1770 void igbvf_update_stats(struct igbvf_adapter *adapter)
1771 {
1772         struct e1000_hw *hw = &adapter->hw;
1773         struct pci_dev *pdev = adapter->pdev;
1774
1775         /*
1776          * Prevent stats update while adapter is being reset, link is down
1777          * or if the pci connection is down.
1778          */
1779         if (adapter->link_speed == 0)
1780                 return;
1781
1782         if (test_bit(__IGBVF_RESETTING, &adapter->state))
1783                 return;
1784
1785         if (pci_channel_offline(pdev))
1786                 return;
1787
1788         UPDATE_VF_COUNTER(VFGPRC, gprc);
1789         UPDATE_VF_COUNTER(VFGORC, gorc);
1790         UPDATE_VF_COUNTER(VFGPTC, gptc);
1791         UPDATE_VF_COUNTER(VFGOTC, gotc);
1792         UPDATE_VF_COUNTER(VFMPRC, mprc);
1793         UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1794         UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1795         UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1796         UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1797
1798         /* Fill out the OS statistics structure */
1799         adapter->net_stats.multicast = adapter->stats.mprc;
1800 }
1801
1802 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1803 {
1804         dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s\n",
1805                  adapter->link_speed,
1806                  ((adapter->link_duplex == FULL_DUPLEX) ?
1807                   "Full Duplex" : "Half Duplex"));
1808 }
1809
1810 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1811 {
1812         struct e1000_hw *hw = &adapter->hw;
1813         s32 ret_val = E1000_SUCCESS;
1814         bool link_active;
1815
1816         ret_val = hw->mac.ops.check_for_link(hw);
1817         link_active = !hw->mac.get_link_status;
1818
1819         /* if check for link returns error we will need to reset */
1820         if (ret_val)
1821                 schedule_work(&adapter->reset_task);
1822
1823         return link_active;
1824 }
1825
1826 /**
1827  * igbvf_watchdog - Timer Call-back
1828  * @data: pointer to adapter cast into an unsigned long
1829  **/
1830 static void igbvf_watchdog(unsigned long data)
1831 {
1832         struct igbvf_adapter *adapter = (struct igbvf_adapter *) data;
1833
1834         /* Do the rest outside of interrupt context */
1835         schedule_work(&adapter->watchdog_task);
1836 }
1837
1838 static void igbvf_watchdog_task(struct work_struct *work)
1839 {
1840         struct igbvf_adapter *adapter = container_of(work,
1841                                                      struct igbvf_adapter,
1842                                                      watchdog_task);
1843         struct net_device *netdev = adapter->netdev;
1844         struct e1000_mac_info *mac = &adapter->hw.mac;
1845         struct igbvf_ring *tx_ring = adapter->tx_ring;
1846         struct e1000_hw *hw = &adapter->hw;
1847         u32 link;
1848         int tx_pending = 0;
1849
1850         link = igbvf_has_link(adapter);
1851
1852         if (link) {
1853                 if (!netif_carrier_ok(netdev)) {
1854                         bool txb2b = 1;
1855
1856                         mac->ops.get_link_up_info(&adapter->hw,
1857                                                   &adapter->link_speed,
1858                                                   &adapter->link_duplex);
1859                         igbvf_print_link_info(adapter);
1860
1861                         /*
1862                          * tweak tx_queue_len according to speed/duplex
1863                          * and adjust the timeout factor
1864                          */
1865                         netdev->tx_queue_len = adapter->tx_queue_len;
1866                         adapter->tx_timeout_factor = 1;
1867                         switch (adapter->link_speed) {
1868                         case SPEED_10:
1869                                 txb2b = 0;
1870                                 netdev->tx_queue_len = 10;
1871                                 adapter->tx_timeout_factor = 16;
1872                                 break;
1873                         case SPEED_100:
1874                                 txb2b = 0;
1875                                 netdev->tx_queue_len = 100;
1876                                 /* maybe add some timeout factor ? */
1877                                 break;
1878                         }
1879
1880                         netif_carrier_on(netdev);
1881                         netif_wake_queue(netdev);
1882                 }
1883         } else {
1884                 if (netif_carrier_ok(netdev)) {
1885                         adapter->link_speed = 0;
1886                         adapter->link_duplex = 0;
1887                         dev_info(&adapter->pdev->dev, "Link is Down\n");
1888                         netif_carrier_off(netdev);
1889                         netif_stop_queue(netdev);
1890                 }
1891         }
1892
1893         if (netif_carrier_ok(netdev)) {
1894                 igbvf_update_stats(adapter);
1895         } else {
1896                 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1897                               tx_ring->count);
1898                 if (tx_pending) {
1899                         /*
1900                          * We've lost link, so the controller stops DMA,
1901                          * but we've got queued Tx work that's never going
1902                          * to get done, so reset controller to flush Tx.
1903                          * (Do the reset outside of interrupt context).
1904                          */
1905                         adapter->tx_timeout_count++;
1906                         schedule_work(&adapter->reset_task);
1907                 }
1908         }
1909
1910         /* Cause software interrupt to ensure Rx ring is cleaned */
1911         ew32(EICS, adapter->rx_ring->eims_value);
1912
1913         /* Force detection of hung controller every watchdog period */
1914         adapter->detect_tx_hung = 1;
1915
1916         /* Reset the timer */
1917         if (!test_bit(__IGBVF_DOWN, &adapter->state))
1918                 mod_timer(&adapter->watchdog_timer,
1919                           round_jiffies(jiffies + (2 * HZ)));
1920 }
1921
1922 #define IGBVF_TX_FLAGS_CSUM             0x00000001
1923 #define IGBVF_TX_FLAGS_VLAN             0x00000002
1924 #define IGBVF_TX_FLAGS_TSO              0x00000004
1925 #define IGBVF_TX_FLAGS_IPV4             0x00000008
1926 #define IGBVF_TX_FLAGS_VLAN_MASK        0xffff0000
1927 #define IGBVF_TX_FLAGS_VLAN_SHIFT       16
1928
1929 static int igbvf_tso(struct igbvf_adapter *adapter,
1930                      struct igbvf_ring *tx_ring,
1931                      struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
1932 {
1933         struct e1000_adv_tx_context_desc *context_desc;
1934         unsigned int i;
1935         int err;
1936         struct igbvf_buffer *buffer_info;
1937         u32 info = 0, tu_cmd = 0;
1938         u32 mss_l4len_idx, l4len;
1939         *hdr_len = 0;
1940
1941         if (skb_header_cloned(skb)) {
1942                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
1943                 if (err) {
1944                         dev_err(&adapter->pdev->dev,
1945                                 "igbvf_tso returning an error\n");
1946                         return err;
1947                 }
1948         }
1949
1950         l4len = tcp_hdrlen(skb);
1951         *hdr_len += l4len;
1952
1953         if (skb->protocol == htons(ETH_P_IP)) {
1954                 struct iphdr *iph = ip_hdr(skb);
1955                 iph->tot_len = 0;
1956                 iph->check = 0;
1957                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
1958                                                          iph->daddr, 0,
1959                                                          IPPROTO_TCP,
1960                                                          0);
1961         } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
1962                 ipv6_hdr(skb)->payload_len = 0;
1963                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
1964                                                        &ipv6_hdr(skb)->daddr,
1965                                                        0, IPPROTO_TCP, 0);
1966         }
1967
1968         i = tx_ring->next_to_use;
1969
1970         buffer_info = &tx_ring->buffer_info[i];
1971         context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1972         /* VLAN MACLEN IPLEN */
1973         if (tx_flags & IGBVF_TX_FLAGS_VLAN)
1974                 info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
1975         info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
1976         *hdr_len += skb_network_offset(skb);
1977         info |= (skb_transport_header(skb) - skb_network_header(skb));
1978         *hdr_len += (skb_transport_header(skb) - skb_network_header(skb));
1979         context_desc->vlan_macip_lens = cpu_to_le32(info);
1980
1981         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
1982         tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
1983
1984         if (skb->protocol == htons(ETH_P_IP))
1985                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
1986         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
1987
1988         context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
1989
1990         /* MSS L4LEN IDX */
1991         mss_l4len_idx = (skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT);
1992         mss_l4len_idx |= (l4len << E1000_ADVTXD_L4LEN_SHIFT);
1993
1994         context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
1995         context_desc->seqnum_seed = 0;
1996
1997         buffer_info->time_stamp = jiffies;
1998         buffer_info->next_to_watch = i;
1999         buffer_info->dma = 0;
2000         i++;
2001         if (i == tx_ring->count)
2002                 i = 0;
2003
2004         tx_ring->next_to_use = i;
2005
2006         return true;
2007 }
2008
2009 static inline bool igbvf_tx_csum(struct igbvf_adapter *adapter,
2010                                  struct igbvf_ring *tx_ring,
2011                                  struct sk_buff *skb, u32 tx_flags)
2012 {
2013         struct e1000_adv_tx_context_desc *context_desc;
2014         unsigned int i;
2015         struct igbvf_buffer *buffer_info;
2016         u32 info = 0, tu_cmd = 0;
2017
2018         if ((skb->ip_summed == CHECKSUM_PARTIAL) ||
2019             (tx_flags & IGBVF_TX_FLAGS_VLAN)) {
2020                 i = tx_ring->next_to_use;
2021                 buffer_info = &tx_ring->buffer_info[i];
2022                 context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
2023
2024                 if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2025                         info |= (tx_flags & IGBVF_TX_FLAGS_VLAN_MASK);
2026
2027                 info |= (skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT);
2028                 if (skb->ip_summed == CHECKSUM_PARTIAL)
2029                         info |= (skb_transport_header(skb) -
2030                                  skb_network_header(skb));
2031
2032
2033                 context_desc->vlan_macip_lens = cpu_to_le32(info);
2034
2035                 tu_cmd |= (E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT);
2036
2037                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
2038                         switch (skb->protocol) {
2039                         case __constant_htons(ETH_P_IP):
2040                                 tu_cmd |= E1000_ADVTXD_TUCMD_IPV4;
2041                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
2042                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2043                                 break;
2044                         case __constant_htons(ETH_P_IPV6):
2045                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
2046                                         tu_cmd |= E1000_ADVTXD_TUCMD_L4T_TCP;
2047                                 break;
2048                         default:
2049                                 break;
2050                         }
2051                 }
2052
2053                 context_desc->type_tucmd_mlhl = cpu_to_le32(tu_cmd);
2054                 context_desc->seqnum_seed = 0;
2055                 context_desc->mss_l4len_idx = 0;
2056
2057                 buffer_info->time_stamp = jiffies;
2058                 buffer_info->next_to_watch = i;
2059                 buffer_info->dma = 0;
2060                 i++;
2061                 if (i == tx_ring->count)
2062                         i = 0;
2063                 tx_ring->next_to_use = i;
2064
2065                 return true;
2066         }
2067
2068         return false;
2069 }
2070
2071 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2072 {
2073         struct igbvf_adapter *adapter = netdev_priv(netdev);
2074
2075         /* there is enough descriptors then we don't need to worry  */
2076         if (igbvf_desc_unused(adapter->tx_ring) >= size)
2077                 return 0;
2078
2079         netif_stop_queue(netdev);
2080
2081         smp_mb();
2082
2083         /* We need to check again just in case room has been made available */
2084         if (igbvf_desc_unused(adapter->tx_ring) < size)
2085                 return -EBUSY;
2086
2087         netif_wake_queue(netdev);
2088
2089         ++adapter->restart_queue;
2090         return 0;
2091 }
2092
2093 #define IGBVF_MAX_TXD_PWR       16
2094 #define IGBVF_MAX_DATA_PER_TXD  (1 << IGBVF_MAX_TXD_PWR)
2095
2096 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2097                                    struct igbvf_ring *tx_ring,
2098                                    struct sk_buff *skb,
2099                                    unsigned int first)
2100 {
2101         struct igbvf_buffer *buffer_info;
2102         unsigned int len = skb_headlen(skb);
2103         unsigned int count = 0, i;
2104         unsigned int f;
2105         dma_addr_t *map;
2106
2107         i = tx_ring->next_to_use;
2108
2109         if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
2110                 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
2111                 return 0;
2112         }
2113
2114         map = skb_shinfo(skb)->dma_maps;
2115
2116         buffer_info = &tx_ring->buffer_info[i];
2117         BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2118         buffer_info->length = len;
2119         /* set time_stamp *before* dma to help avoid a possible race */
2120         buffer_info->time_stamp = jiffies;
2121         buffer_info->next_to_watch = i;
2122         buffer_info->dma = skb_shinfo(skb)->dma_head;
2123
2124         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2125                 struct skb_frag_struct *frag;
2126
2127                 i++;
2128                 if (i == tx_ring->count)
2129                         i = 0;
2130
2131                 frag = &skb_shinfo(skb)->frags[f];
2132                 len = frag->size;
2133
2134                 buffer_info = &tx_ring->buffer_info[i];
2135                 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2136                 buffer_info->length = len;
2137                 buffer_info->time_stamp = jiffies;
2138                 buffer_info->next_to_watch = i;
2139                 buffer_info->dma = map[count];
2140                 count++;
2141         }
2142
2143         tx_ring->buffer_info[i].skb = skb;
2144         tx_ring->buffer_info[first].next_to_watch = i;
2145
2146         return count + 1;
2147 }
2148
2149 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2150                                       struct igbvf_ring *tx_ring,
2151                                       int tx_flags, int count, u32 paylen,
2152                                       u8 hdr_len)
2153 {
2154         union e1000_adv_tx_desc *tx_desc = NULL;
2155         struct igbvf_buffer *buffer_info;
2156         u32 olinfo_status = 0, cmd_type_len;
2157         unsigned int i;
2158
2159         cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2160                         E1000_ADVTXD_DCMD_DEXT);
2161
2162         if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2163                 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2164
2165         if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2166                 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2167
2168                 /* insert tcp checksum */
2169                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2170
2171                 /* insert ip checksum */
2172                 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2173                         olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2174
2175         } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2176                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2177         }
2178
2179         olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2180
2181         i = tx_ring->next_to_use;
2182         while (count--) {
2183                 buffer_info = &tx_ring->buffer_info[i];
2184                 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2185                 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2186                 tx_desc->read.cmd_type_len =
2187                          cpu_to_le32(cmd_type_len | buffer_info->length);
2188                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2189                 i++;
2190                 if (i == tx_ring->count)
2191                         i = 0;
2192         }
2193
2194         tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2195         /* Force memory writes to complete before letting h/w
2196          * know there are new descriptors to fetch.  (Only
2197          * applicable for weak-ordered memory model archs,
2198          * such as IA-64). */
2199         wmb();
2200
2201         tx_ring->next_to_use = i;
2202         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2203         /* we need this if more than one processor can write to our tail
2204          * at a time, it syncronizes IO on IA64/Altix systems */
2205         mmiowb();
2206 }
2207
2208 static int igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2209                                    struct net_device *netdev,
2210                                    struct igbvf_ring *tx_ring)
2211 {
2212         struct igbvf_adapter *adapter = netdev_priv(netdev);
2213         unsigned int first, tx_flags = 0;
2214         u8 hdr_len = 0;
2215         int count = 0;
2216         int tso = 0;
2217
2218         if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2219                 dev_kfree_skb_any(skb);
2220                 return NETDEV_TX_OK;
2221         }
2222
2223         if (skb->len <= 0) {
2224                 dev_kfree_skb_any(skb);
2225                 return NETDEV_TX_OK;
2226         }
2227
2228         /*
2229          * need: count + 4 desc gap to keep tail from touching
2230          *       + 2 desc gap to keep tail from touching head,
2231          *       + 1 desc for skb->data,
2232          *       + 1 desc for context descriptor,
2233          * head, otherwise try next time
2234          */
2235         if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2236                 /* this is a hard error */
2237                 return NETDEV_TX_BUSY;
2238         }
2239
2240         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
2241                 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2242                 tx_flags |= (vlan_tx_tag_get(skb) << IGBVF_TX_FLAGS_VLAN_SHIFT);
2243         }
2244
2245         if (skb->protocol == htons(ETH_P_IP))
2246                 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2247
2248         first = tx_ring->next_to_use;
2249
2250         tso = skb_is_gso(skb) ?
2251                 igbvf_tso(adapter, tx_ring, skb, tx_flags, &hdr_len) : 0;
2252         if (unlikely(tso < 0)) {
2253                 dev_kfree_skb_any(skb);
2254                 return NETDEV_TX_OK;
2255         }
2256
2257         if (tso)
2258                 tx_flags |= IGBVF_TX_FLAGS_TSO;
2259         else if (igbvf_tx_csum(adapter, tx_ring, skb, tx_flags) &&
2260                  (skb->ip_summed == CHECKSUM_PARTIAL))
2261                 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2262
2263         /*
2264          * count reflects descriptors mapped, if 0 then mapping error
2265          * has occured and we need to rewind the descriptor queue
2266          */
2267         count = igbvf_tx_map_adv(adapter, tx_ring, skb, first);
2268
2269         if (count) {
2270                 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2271                                    skb->len, hdr_len);
2272                 /* Make sure there is space in the ring for the next send. */
2273                 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2274         } else {
2275                 dev_kfree_skb_any(skb);
2276                 tx_ring->buffer_info[first].time_stamp = 0;
2277                 tx_ring->next_to_use = first;
2278         }
2279
2280         return NETDEV_TX_OK;
2281 }
2282
2283 static int igbvf_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
2284 {
2285         struct igbvf_adapter *adapter = netdev_priv(netdev);
2286         struct igbvf_ring *tx_ring;
2287         int retval;
2288
2289         if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2290                 dev_kfree_skb_any(skb);
2291                 return NETDEV_TX_OK;
2292         }
2293
2294         tx_ring = &adapter->tx_ring[0];
2295
2296         retval = igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2297
2298         return retval;
2299 }
2300
2301 /**
2302  * igbvf_tx_timeout - Respond to a Tx Hang
2303  * @netdev: network interface device structure
2304  **/
2305 static void igbvf_tx_timeout(struct net_device *netdev)
2306 {
2307         struct igbvf_adapter *adapter = netdev_priv(netdev);
2308
2309         /* Do the reset outside of interrupt context */
2310         adapter->tx_timeout_count++;
2311         schedule_work(&adapter->reset_task);
2312 }
2313
2314 static void igbvf_reset_task(struct work_struct *work)
2315 {
2316         struct igbvf_adapter *adapter;
2317         adapter = container_of(work, struct igbvf_adapter, reset_task);
2318
2319         igbvf_reinit_locked(adapter);
2320 }
2321
2322 /**
2323  * igbvf_get_stats - Get System Network Statistics
2324  * @netdev: network interface device structure
2325  *
2326  * Returns the address of the device statistics structure.
2327  * The statistics are actually updated from the timer callback.
2328  **/
2329 static struct net_device_stats *igbvf_get_stats(struct net_device *netdev)
2330 {
2331         struct igbvf_adapter *adapter = netdev_priv(netdev);
2332
2333         /* only return the current stats */
2334         return &adapter->net_stats;
2335 }
2336
2337 /**
2338  * igbvf_change_mtu - Change the Maximum Transfer Unit
2339  * @netdev: network interface device structure
2340  * @new_mtu: new value for maximum frame size
2341  *
2342  * Returns 0 on success, negative on failure
2343  **/
2344 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2345 {
2346         struct igbvf_adapter *adapter = netdev_priv(netdev);
2347         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2348
2349         if ((new_mtu < 68) || (max_frame > MAX_JUMBO_FRAME_SIZE)) {
2350                 dev_err(&adapter->pdev->dev, "Invalid MTU setting\n");
2351                 return -EINVAL;
2352         }
2353
2354 #define MAX_STD_JUMBO_FRAME_SIZE 9234
2355         if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
2356                 dev_err(&adapter->pdev->dev, "MTU > 9216 not supported.\n");
2357                 return -EINVAL;
2358         }
2359
2360         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2361                 msleep(1);
2362         /* igbvf_down has a dependency on max_frame_size */
2363         adapter->max_frame_size = max_frame;
2364         if (netif_running(netdev))
2365                 igbvf_down(adapter);
2366
2367         /*
2368          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2369          * means we reserve 2 more, this pushes us to allocate from the next
2370          * larger slab size.
2371          * i.e. RXBUFFER_2048 --> size-4096 slab
2372          * However with the new *_jumbo_rx* routines, jumbo receives will use
2373          * fragmented skbs
2374          */
2375
2376         if (max_frame <= 1024)
2377                 adapter->rx_buffer_len = 1024;
2378         else if (max_frame <= 2048)
2379                 adapter->rx_buffer_len = 2048;
2380         else
2381 #if (PAGE_SIZE / 2) > 16384
2382                 adapter->rx_buffer_len = 16384;
2383 #else
2384                 adapter->rx_buffer_len = PAGE_SIZE / 2;
2385 #endif
2386
2387
2388         /* adjust allocation if LPE protects us, and we aren't using SBP */
2389         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2390              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2391                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2392                                          ETH_FCS_LEN;
2393
2394         dev_info(&adapter->pdev->dev, "changing MTU from %d to %d\n",
2395                  netdev->mtu, new_mtu);
2396         netdev->mtu = new_mtu;
2397
2398         if (netif_running(netdev))
2399                 igbvf_up(adapter);
2400         else
2401                 igbvf_reset(adapter);
2402
2403         clear_bit(__IGBVF_RESETTING, &adapter->state);
2404
2405         return 0;
2406 }
2407
2408 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2409 {
2410         switch (cmd) {
2411         default:
2412                 return -EOPNOTSUPP;
2413         }
2414 }
2415
2416 static int igbvf_suspend(struct pci_dev *pdev, pm_message_t state)
2417 {
2418         struct net_device *netdev = pci_get_drvdata(pdev);
2419         struct igbvf_adapter *adapter = netdev_priv(netdev);
2420 #ifdef CONFIG_PM
2421         int retval = 0;
2422 #endif
2423
2424         netif_device_detach(netdev);
2425
2426         if (netif_running(netdev)) {
2427                 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2428                 igbvf_down(adapter);
2429                 igbvf_free_irq(adapter);
2430         }
2431
2432 #ifdef CONFIG_PM
2433         retval = pci_save_state(pdev);
2434         if (retval)
2435                 return retval;
2436 #endif
2437
2438         pci_disable_device(pdev);
2439
2440         return 0;
2441 }
2442
2443 #ifdef CONFIG_PM
2444 static int igbvf_resume(struct pci_dev *pdev)
2445 {
2446         struct net_device *netdev = pci_get_drvdata(pdev);
2447         struct igbvf_adapter *adapter = netdev_priv(netdev);
2448         u32 err;
2449
2450         pci_restore_state(pdev);
2451         err = pci_enable_device_mem(pdev);
2452         if (err) {
2453                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend\n");
2454                 return err;
2455         }
2456
2457         pci_set_master(pdev);
2458
2459         if (netif_running(netdev)) {
2460                 err = igbvf_request_irq(adapter);
2461                 if (err)
2462                         return err;
2463         }
2464
2465         igbvf_reset(adapter);
2466
2467         if (netif_running(netdev))
2468                 igbvf_up(adapter);
2469
2470         netif_device_attach(netdev);
2471
2472         return 0;
2473 }
2474 #endif
2475
2476 static void igbvf_shutdown(struct pci_dev *pdev)
2477 {
2478         igbvf_suspend(pdev, PMSG_SUSPEND);
2479 }
2480
2481 #ifdef CONFIG_NET_POLL_CONTROLLER
2482 /*
2483  * Polling 'interrupt' - used by things like netconsole to send skbs
2484  * without having to re-enable interrupts. It's not called while
2485  * the interrupt routine is executing.
2486  */
2487 static void igbvf_netpoll(struct net_device *netdev)
2488 {
2489         struct igbvf_adapter *adapter = netdev_priv(netdev);
2490
2491         disable_irq(adapter->pdev->irq);
2492
2493         igbvf_clean_tx_irq(adapter->tx_ring);
2494
2495         enable_irq(adapter->pdev->irq);
2496 }
2497 #endif
2498
2499 /**
2500  * igbvf_io_error_detected - called when PCI error is detected
2501  * @pdev: Pointer to PCI device
2502  * @state: The current pci connection state
2503  *
2504  * This function is called after a PCI bus error affecting
2505  * this device has been detected.
2506  */
2507 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2508                                                 pci_channel_state_t state)
2509 {
2510         struct net_device *netdev = pci_get_drvdata(pdev);
2511         struct igbvf_adapter *adapter = netdev_priv(netdev);
2512
2513         netif_device_detach(netdev);
2514
2515         if (netif_running(netdev))
2516                 igbvf_down(adapter);
2517         pci_disable_device(pdev);
2518
2519         /* Request a slot slot reset. */
2520         return PCI_ERS_RESULT_NEED_RESET;
2521 }
2522
2523 /**
2524  * igbvf_io_slot_reset - called after the pci bus has been reset.
2525  * @pdev: Pointer to PCI device
2526  *
2527  * Restart the card from scratch, as if from a cold-boot. Implementation
2528  * resembles the first-half of the igbvf_resume routine.
2529  */
2530 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2531 {
2532         struct net_device *netdev = pci_get_drvdata(pdev);
2533         struct igbvf_adapter *adapter = netdev_priv(netdev);
2534
2535         if (pci_enable_device_mem(pdev)) {
2536                 dev_err(&pdev->dev,
2537                         "Cannot re-enable PCI device after reset.\n");
2538                 return PCI_ERS_RESULT_DISCONNECT;
2539         }
2540         pci_set_master(pdev);
2541
2542         igbvf_reset(adapter);
2543
2544         return PCI_ERS_RESULT_RECOVERED;
2545 }
2546
2547 /**
2548  * igbvf_io_resume - called when traffic can start flowing again.
2549  * @pdev: Pointer to PCI device
2550  *
2551  * This callback is called when the error recovery driver tells us that
2552  * its OK to resume normal operation. Implementation resembles the
2553  * second-half of the igbvf_resume routine.
2554  */
2555 static void igbvf_io_resume(struct pci_dev *pdev)
2556 {
2557         struct net_device *netdev = pci_get_drvdata(pdev);
2558         struct igbvf_adapter *adapter = netdev_priv(netdev);
2559
2560         if (netif_running(netdev)) {
2561                 if (igbvf_up(adapter)) {
2562                         dev_err(&pdev->dev,
2563                                 "can't bring device back up after reset\n");
2564                         return;
2565                 }
2566         }
2567
2568         netif_device_attach(netdev);
2569 }
2570
2571 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2572 {
2573         struct e1000_hw *hw = &adapter->hw;
2574         struct net_device *netdev = adapter->netdev;
2575         struct pci_dev *pdev = adapter->pdev;
2576
2577         dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2578         dev_info(&pdev->dev, "Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
2579                  /* MAC address */
2580                  netdev->dev_addr[0], netdev->dev_addr[1],
2581                  netdev->dev_addr[2], netdev->dev_addr[3],
2582                  netdev->dev_addr[4], netdev->dev_addr[5]);
2583         dev_info(&pdev->dev, "MAC: %d\n", hw->mac.type);
2584 }
2585
2586 static const struct net_device_ops igbvf_netdev_ops = {
2587         .ndo_open                       = igbvf_open,
2588         .ndo_stop                       = igbvf_close,
2589         .ndo_start_xmit                 = igbvf_xmit_frame,
2590         .ndo_get_stats                  = igbvf_get_stats,
2591         .ndo_set_multicast_list         = igbvf_set_multi,
2592         .ndo_set_mac_address            = igbvf_set_mac,
2593         .ndo_change_mtu                 = igbvf_change_mtu,
2594         .ndo_do_ioctl                   = igbvf_ioctl,
2595         .ndo_tx_timeout                 = igbvf_tx_timeout,
2596         .ndo_vlan_rx_register           = igbvf_vlan_rx_register,
2597         .ndo_vlan_rx_add_vid            = igbvf_vlan_rx_add_vid,
2598         .ndo_vlan_rx_kill_vid           = igbvf_vlan_rx_kill_vid,
2599 #ifdef CONFIG_NET_POLL_CONTROLLER
2600         .ndo_poll_controller            = igbvf_netpoll,
2601 #endif
2602 };
2603
2604 /**
2605  * igbvf_probe - Device Initialization Routine
2606  * @pdev: PCI device information struct
2607  * @ent: entry in igbvf_pci_tbl
2608  *
2609  * Returns 0 on success, negative on failure
2610  *
2611  * igbvf_probe initializes an adapter identified by a pci_dev structure.
2612  * The OS initialization, configuring of the adapter private structure,
2613  * and a hardware reset occur.
2614  **/
2615 static int __devinit igbvf_probe(struct pci_dev *pdev,
2616                                  const struct pci_device_id *ent)
2617 {
2618         struct net_device *netdev;
2619         struct igbvf_adapter *adapter;
2620         struct e1000_hw *hw;
2621         const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2622
2623         static int cards_found;
2624         int err, pci_using_dac;
2625
2626         err = pci_enable_device_mem(pdev);
2627         if (err)
2628                 return err;
2629
2630         pci_using_dac = 0;
2631         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
2632         if (!err) {
2633                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
2634                 if (!err)
2635                         pci_using_dac = 1;
2636         } else {
2637                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2638                 if (err) {
2639                         err = pci_set_consistent_dma_mask(pdev,
2640                                                           DMA_BIT_MASK(32));
2641                         if (err) {
2642                                 dev_err(&pdev->dev, "No usable DMA "
2643                                         "configuration, aborting\n");
2644                                 goto err_dma;
2645                         }
2646                 }
2647         }
2648
2649         err = pci_request_regions(pdev, igbvf_driver_name);
2650         if (err)
2651                 goto err_pci_reg;
2652
2653         pci_set_master(pdev);
2654
2655         err = -ENOMEM;
2656         netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2657         if (!netdev)
2658                 goto err_alloc_etherdev;
2659
2660         SET_NETDEV_DEV(netdev, &pdev->dev);
2661
2662         pci_set_drvdata(pdev, netdev);
2663         adapter = netdev_priv(netdev);
2664         hw = &adapter->hw;
2665         adapter->netdev = netdev;
2666         adapter->pdev = pdev;
2667         adapter->ei = ei;
2668         adapter->pba = ei->pba;
2669         adapter->flags = ei->flags;
2670         adapter->hw.back = adapter;
2671         adapter->hw.mac.type = ei->mac;
2672         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
2673
2674         /* PCI config space info */
2675
2676         hw->vendor_id = pdev->vendor;
2677         hw->device_id = pdev->device;
2678         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2679         hw->subsystem_device_id = pdev->subsystem_device;
2680
2681         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2682
2683         err = -EIO;
2684         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2685                                       pci_resource_len(pdev, 0));
2686
2687         if (!adapter->hw.hw_addr)
2688                 goto err_ioremap;
2689
2690         if (ei->get_variants) {
2691                 err = ei->get_variants(adapter);
2692                 if (err)
2693                         goto err_ioremap;
2694         }
2695
2696         /* setup adapter struct */
2697         err = igbvf_sw_init(adapter);
2698         if (err)
2699                 goto err_sw_init;
2700
2701         /* construct the net_device struct */
2702         netdev->netdev_ops = &igbvf_netdev_ops;
2703
2704         igbvf_set_ethtool_ops(netdev);
2705         netdev->watchdog_timeo = 5 * HZ;
2706         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2707
2708         adapter->bd_number = cards_found++;
2709
2710         netdev->features = NETIF_F_SG |
2711                            NETIF_F_IP_CSUM |
2712                            NETIF_F_HW_VLAN_TX |
2713                            NETIF_F_HW_VLAN_RX |
2714                            NETIF_F_HW_VLAN_FILTER;
2715
2716         netdev->features |= NETIF_F_IPV6_CSUM;
2717         netdev->features |= NETIF_F_TSO;
2718         netdev->features |= NETIF_F_TSO6;
2719
2720         if (pci_using_dac)
2721                 netdev->features |= NETIF_F_HIGHDMA;
2722
2723         netdev->vlan_features |= NETIF_F_TSO;
2724         netdev->vlan_features |= NETIF_F_TSO6;
2725         netdev->vlan_features |= NETIF_F_IP_CSUM;
2726         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
2727         netdev->vlan_features |= NETIF_F_SG;
2728
2729         /*reset the controller to put the device in a known good state */
2730         err = hw->mac.ops.reset_hw(hw);
2731         if (err) {
2732                 dev_info(&pdev->dev,
2733                          "PF still in reset state, assigning new address\n");
2734                 random_ether_addr(hw->mac.addr);
2735         } else {
2736                 err = hw->mac.ops.read_mac_addr(hw);
2737                 if (err) {
2738                         dev_err(&pdev->dev, "Error reading MAC address\n");
2739                         goto err_hw_init;
2740                 }
2741         }
2742
2743         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2744         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2745
2746         if (!is_valid_ether_addr(netdev->perm_addr)) {
2747                 dev_err(&pdev->dev, "Invalid MAC Address: "
2748                         "%02x:%02x:%02x:%02x:%02x:%02x\n",
2749                         netdev->dev_addr[0], netdev->dev_addr[1],
2750                         netdev->dev_addr[2], netdev->dev_addr[3],
2751                         netdev->dev_addr[4], netdev->dev_addr[5]);
2752                 err = -EIO;
2753                 goto err_hw_init;
2754         }
2755
2756         setup_timer(&adapter->watchdog_timer, &igbvf_watchdog,
2757                     (unsigned long) adapter);
2758
2759         INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2760         INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2761
2762         /* ring size defaults */
2763         adapter->rx_ring->count = 1024;
2764         adapter->tx_ring->count = 1024;
2765
2766         /* reset the hardware with the new settings */
2767         igbvf_reset(adapter);
2768
2769         /* tell the stack to leave us alone until igbvf_open() is called */
2770         netif_carrier_off(netdev);
2771         netif_stop_queue(netdev);
2772
2773         strcpy(netdev->name, "eth%d");
2774         err = register_netdev(netdev);
2775         if (err)
2776                 goto err_hw_init;
2777
2778         igbvf_print_device_info(adapter);
2779
2780         igbvf_initialize_last_counter_stats(adapter);
2781
2782         return 0;
2783
2784 err_hw_init:
2785         kfree(adapter->tx_ring);
2786         kfree(adapter->rx_ring);
2787 err_sw_init:
2788         igbvf_reset_interrupt_capability(adapter);
2789         iounmap(adapter->hw.hw_addr);
2790 err_ioremap:
2791         free_netdev(netdev);
2792 err_alloc_etherdev:
2793         pci_release_regions(pdev);
2794 err_pci_reg:
2795 err_dma:
2796         pci_disable_device(pdev);
2797         return err;
2798 }
2799
2800 /**
2801  * igbvf_remove - Device Removal Routine
2802  * @pdev: PCI device information struct
2803  *
2804  * igbvf_remove is called by the PCI subsystem to alert the driver
2805  * that it should release a PCI device.  The could be caused by a
2806  * Hot-Plug event, or because the driver is going to be removed from
2807  * memory.
2808  **/
2809 static void __devexit igbvf_remove(struct pci_dev *pdev)
2810 {
2811         struct net_device *netdev = pci_get_drvdata(pdev);
2812         struct igbvf_adapter *adapter = netdev_priv(netdev);
2813         struct e1000_hw *hw = &adapter->hw;
2814
2815         /*
2816          * flush_scheduled work may reschedule our watchdog task, so
2817          * explicitly disable watchdog tasks from being rescheduled
2818          */
2819         set_bit(__IGBVF_DOWN, &adapter->state);
2820         del_timer_sync(&adapter->watchdog_timer);
2821
2822         flush_scheduled_work();
2823
2824         unregister_netdev(netdev);
2825
2826         igbvf_reset_interrupt_capability(adapter);
2827
2828         /*
2829          * it is important to delete the napi struct prior to freeing the
2830          * rx ring so that you do not end up with null pointer refs
2831          */
2832         netif_napi_del(&adapter->rx_ring->napi);
2833         kfree(adapter->tx_ring);
2834         kfree(adapter->rx_ring);
2835
2836         iounmap(hw->hw_addr);
2837         if (hw->flash_address)
2838                 iounmap(hw->flash_address);
2839         pci_release_regions(pdev);
2840
2841         free_netdev(netdev);
2842
2843         pci_disable_device(pdev);
2844 }
2845
2846 /* PCI Error Recovery (ERS) */
2847 static struct pci_error_handlers igbvf_err_handler = {
2848         .error_detected = igbvf_io_error_detected,
2849         .slot_reset = igbvf_io_slot_reset,
2850         .resume = igbvf_io_resume,
2851 };
2852
2853 static struct pci_device_id igbvf_pci_tbl[] = {
2854         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2855         { } /* terminate list */
2856 };
2857 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2858
2859 /* PCI Device API Driver */
2860 static struct pci_driver igbvf_driver = {
2861         .name     = igbvf_driver_name,
2862         .id_table = igbvf_pci_tbl,
2863         .probe    = igbvf_probe,
2864         .remove   = __devexit_p(igbvf_remove),
2865 #ifdef CONFIG_PM
2866         /* Power Management Hooks */
2867         .suspend  = igbvf_suspend,
2868         .resume   = igbvf_resume,
2869 #endif
2870         .shutdown = igbvf_shutdown,
2871         .err_handler = &igbvf_err_handler
2872 };
2873
2874 /**
2875  * igbvf_init_module - Driver Registration Routine
2876  *
2877  * igbvf_init_module is the first routine called when the driver is
2878  * loaded. All it does is register with the PCI subsystem.
2879  **/
2880 static int __init igbvf_init_module(void)
2881 {
2882         int ret;
2883         printk(KERN_INFO "%s - version %s\n",
2884                igbvf_driver_string, igbvf_driver_version);
2885         printk(KERN_INFO "%s\n", igbvf_copyright);
2886
2887         ret = pci_register_driver(&igbvf_driver);
2888         pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name,
2889                                PM_QOS_DEFAULT_VALUE);
2890
2891         return ret;
2892 }
2893 module_init(igbvf_init_module);
2894
2895 /**
2896  * igbvf_exit_module - Driver Exit Cleanup Routine
2897  *
2898  * igbvf_exit_module is called just before the driver is removed
2899  * from memory.
2900  **/
2901 static void __exit igbvf_exit_module(void)
2902 {
2903         pci_unregister_driver(&igbvf_driver);
2904         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, igbvf_driver_name);
2905 }
2906 module_exit(igbvf_exit_module);
2907
2908
2909 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
2910 MODULE_DESCRIPTION("Intel(R) 82576 Virtual Function Network Driver");
2911 MODULE_LICENSE("GPL");
2912 MODULE_VERSION(DRV_VERSION);
2913
2914 /* netdev.c */