drivers/net/ethernet/intel/igbvf/netdev.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2009 - 2018 Intel Corporation. */
   3
   4 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
   5
   6 #include <linux/module.h>
   7 #include <linux/types.h>
   8 #include <linux/init.h>
   9 #include <linux/pci.h>
  10 #include <linux/vmalloc.h>
  11 #include <linux/pagemap.h>
  12 #include <linux/delay.h>
  13 #include <linux/netdevice.h>
  14 #include <linux/tcp.h>
  15 #include <linux/ipv6.h>
  16 #include <linux/slab.h>
  17 #include <net/checksum.h>
  18 #include <net/ip6_checksum.h>
  19 #include <linux/mii.h>
  20 #include <linux/ethtool.h>
  21 #include <linux/if_vlan.h>
  22 #include <linux/prefetch.h>
  23 #include <linux/sctp.h>
  24
  25 #include "igbvf.h"
  26
  27 char igbvf_driver_name[] = "igbvf";
  28 static const char igbvf_driver_string[] =
  29                   "Intel(R) Gigabit Virtual Function Network Driver";
  30 static const char igbvf_copyright[] =
  31                   "Copyright (c) 2009 - 2012 Intel Corporation.";
  32
  33 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  34 static int debug = -1;
  35 module_param(debug, int, 0);
  36 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  37
  38 static int igbvf_poll(struct napi_struct *napi, int budget);
  39 static void igbvf_reset(struct igbvf_adapter *);
  40 static void igbvf_set_interrupt_capability(struct igbvf_adapter *);
  41 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *);
  42
  43 static struct igbvf_info igbvf_vf_info = {
  44         .mac            = e1000_vfadapt,
  45         .flags          = 0,
  46         .pba            = 10,
  47         .init_ops       = e1000_init_function_pointers_vf,
  48 };
  49
  50 static struct igbvf_info igbvf_i350_vf_info = {
  51         .mac            = e1000_vfadapt_i350,
  52         .flags          = 0,
  53         .pba            = 10,
  54         .init_ops       = e1000_init_function_pointers_vf,
  55 };
  56
  57 static const struct igbvf_info *igbvf_info_tbl[] = {
  58         [board_vf]      = &igbvf_vf_info,
  59         [board_i350_vf] = &igbvf_i350_vf_info,
  60 };
  61
  62 /**
  63  * igbvf_desc_unused - calculate if we have unused descriptors
  64  * @ring: address of receive ring structure
  65  **/
  66 static int igbvf_desc_unused(struct igbvf_ring *ring)
  67 {
  68         if (ring->next_to_clean > ring->next_to_use)
  69                 return ring->next_to_clean - ring->next_to_use - 1;
  70
  71         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  72 }
  73
  74 /**
  75  * igbvf_receive_skb - helper function to handle Rx indications
  76  * @adapter: board private structure
  77  * @netdev: pointer to netdev struct
  78  * @skb: skb to indicate to stack
  79  * @status: descriptor status field as written by hardware
  80  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  81  * @skb: pointer to sk_buff to be indicated to stack
  82  **/
  83 static void igbvf_receive_skb(struct igbvf_adapter *adapter,
  84                               struct net_device *netdev,
  85                               struct sk_buff *skb,
  86                               u32 status, __le16 vlan)
  87 {
  88         u16 vid;
  89
  90         if (status & E1000_RXD_STAT_VP) {
  91                 if ((adapter->flags & IGBVF_FLAG_RX_LB_VLAN_BSWAP) &&
  92                     (status & E1000_RXDEXT_STATERR_LB))
  93                         vid = be16_to_cpu((__force __be16)vlan) & E1000_RXD_SPC_VLAN_MASK;
  94                 else
  95                         vid = le16_to_cpu(vlan) & E1000_RXD_SPC_VLAN_MASK;
  96                 if (test_bit(vid, adapter->active_vlans))
  97                         __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), vid);
  98         }
  99
 100         napi_gro_receive(&adapter->rx_ring->napi, skb);
 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_checksum_none_assert(skb);
 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
 153         while (cleaned_count--) {
 154                 rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
 155
 156                 if (adapter->rx_ps_hdr_size && !buffer_info->page_dma) {
 157                         if (!buffer_info->page) {
 158                                 buffer_info->page = alloc_page(GFP_ATOMIC);
 159                                 if (!buffer_info->page) {
 160                                         adapter->alloc_rx_buff_failed++;
 161                                         goto no_buffers;
 162                                 }
 163                                 buffer_info->page_offset = 0;
 164                         } else {
 165                                 buffer_info->page_offset ^= PAGE_SIZE / 2;
 166                         }
 167                         buffer_info->page_dma =
 168                                 dma_map_page(&pdev->dev, buffer_info->page,
 169                                              buffer_info->page_offset,
 170                                              PAGE_SIZE / 2,
 171                                              DMA_FROM_DEVICE);
 172                         if (dma_mapping_error(&pdev->dev,
 173                                               buffer_info->page_dma)) {
 174                                 __free_page(buffer_info->page);
 175                                 buffer_info->page = NULL;
 176                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 177                                 break;
 178                         }
 179                 }
 180
 181                 if (!buffer_info->skb) {
 182                         skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 183                         if (!skb) {
 184                                 adapter->alloc_rx_buff_failed++;
 185                                 goto no_buffers;
 186                         }
 187
 188                         buffer_info->skb = skb;
 189                         buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 190                                                           bufsz,
 191                                                           DMA_FROM_DEVICE);
 192                         if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 193                                 dev_kfree_skb(buffer_info->skb);
 194                                 buffer_info->skb = NULL;
 195                                 dev_err(&pdev->dev, "RX DMA map failed\n");
 196                                 goto no_buffers;
 197                         }
 198                 }
 199                 /* Refresh the desc even if buffer_addrs didn't change because
 200                  * each write-back erases this info.
 201                  */
 202                 if (adapter->rx_ps_hdr_size) {
 203                         rx_desc->read.pkt_addr =
 204                              cpu_to_le64(buffer_info->page_dma);
 205                         rx_desc->read.hdr_addr = cpu_to_le64(buffer_info->dma);
 206                 } else {
 207                         rx_desc->read.pkt_addr = cpu_to_le64(buffer_info->dma);
 208                         rx_desc->read.hdr_addr = 0;
 209                 }
 210
 211                 i++;
 212                 if (i == rx_ring->count)
 213                         i = 0;
 214                 buffer_info = &rx_ring->buffer_info[i];
 215         }
 216
 217 no_buffers:
 218         if (rx_ring->next_to_use != i) {
 219                 rx_ring->next_to_use = i;
 220                 if (i == 0)
 221                         i = (rx_ring->count - 1);
 222                 else
 223                         i--;
 224
 225                 /* Force memory writes to complete before letting h/w
 226                  * know there are new descriptors to fetch.  (Only
 227                  * applicable for weak-ordered memory model archs,
 228                  * such as IA-64).
 229                 */
 230                 wmb();
 231                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 232         }
 233 }
 234
 235 /**
 236  * igbvf_clean_rx_irq - Send received data up the network stack; legacy
 237  * @adapter: board private structure
 238  * @work_done: output parameter used to indicate completed work
 239  * @work_to_do: input parameter setting limit of work
 240  *
 241  * the return value indicates whether actual cleaning was done, there
 242  * is no guarantee that everything was cleaned
 243  **/
 244 static bool igbvf_clean_rx_irq(struct igbvf_adapter *adapter,
 245                                int *work_done, int work_to_do)
 246 {
 247         struct igbvf_ring *rx_ring = adapter->rx_ring;
 248         struct net_device *netdev = adapter->netdev;
 249         struct pci_dev *pdev = adapter->pdev;
 250         union e1000_adv_rx_desc *rx_desc, *next_rxd;
 251         struct igbvf_buffer *buffer_info, *next_buffer;
 252         struct sk_buff *skb;
 253         bool cleaned = false;
 254         int cleaned_count = 0;
 255         unsigned int total_bytes = 0, total_packets = 0;
 256         unsigned int i;
 257         u32 length, hlen, staterr;
 258
 259         i = rx_ring->next_to_clean;
 260         rx_desc = IGBVF_RX_DESC_ADV(*rx_ring, i);
 261         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 262
 263         while (staterr & E1000_RXD_STAT_DD) {
 264                 if (*work_done >= work_to_do)
 265                         break;
 266                 (*work_done)++;
 267                 rmb(); /* read descriptor and rx_buffer_info after status DD */
 268
 269                 buffer_info = &rx_ring->buffer_info[i];
 270
 271                 /* HW will not DMA in data larger than the given buffer, even
 272                  * if it parses the (NFS, of course) header to be larger.  In
 273                  * that case, it fills the header buffer and spills the rest
 274                  * into the page.
 275                  */
 276                 hlen = (le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info)
 277                        & E1000_RXDADV_HDRBUFLEN_MASK) >>
 278                        E1000_RXDADV_HDRBUFLEN_SHIFT;
 279                 if (hlen > adapter->rx_ps_hdr_size)
 280                         hlen = adapter->rx_ps_hdr_size;
 281
 282                 length = le16_to_cpu(rx_desc->wb.upper.length);
 283                 cleaned = true;
 284                 cleaned_count++;
 285
 286                 skb = buffer_info->skb;
 287                 prefetch(skb->data - NET_IP_ALIGN);
 288                 buffer_info->skb = NULL;
 289                 if (!adapter->rx_ps_hdr_size) {
 290                         dma_unmap_single(&pdev->dev, buffer_info->dma,
 291                                          adapter->rx_buffer_len,
 292                                          DMA_FROM_DEVICE);
 293                         buffer_info->dma = 0;
 294                         skb_put(skb, length);
 295                         goto send_up;
 296                 }
 297
 298                 if (!skb_shinfo(skb)->nr_frags) {
 299                         dma_unmap_single(&pdev->dev, buffer_info->dma,
 300                                          adapter->rx_ps_hdr_size,
 301                                          DMA_FROM_DEVICE);
 302                         buffer_info->dma = 0;
 303                         skb_put(skb, hlen);
 304                 }
 305
 306                 if (length) {
 307                         dma_unmap_page(&pdev->dev, buffer_info->page_dma,
 308                                        PAGE_SIZE / 2,
 309                                        DMA_FROM_DEVICE);
 310                         buffer_info->page_dma = 0;
 311
 312                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 313                                            buffer_info->page,
 314                                            buffer_info->page_offset,
 315                                            length);
 316
 317                         if ((adapter->rx_buffer_len > (PAGE_SIZE / 2)) ||
 318                             (page_count(buffer_info->page) != 1))
 319                                 buffer_info->page = NULL;
 320                         else
 321                                 get_page(buffer_info->page);
 322
 323                         skb->len += length;
 324                         skb->data_len += length;
 325                         skb->truesize += PAGE_SIZE / 2;
 326                 }
 327 send_up:
 328                 i++;
 329                 if (i == rx_ring->count)
 330                         i = 0;
 331                 next_rxd = IGBVF_RX_DESC_ADV(*rx_ring, i);
 332                 prefetch(next_rxd);
 333                 next_buffer = &rx_ring->buffer_info[i];
 334
 335                 if (!(staterr & E1000_RXD_STAT_EOP)) {
 336                         buffer_info->skb = next_buffer->skb;
 337                         buffer_info->dma = next_buffer->dma;
 338                         next_buffer->skb = skb;
 339                         next_buffer->dma = 0;
 340                         goto next_desc;
 341                 }
 342
 343                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 344                         dev_kfree_skb_irq(skb);
 345                         goto next_desc;
 346                 }
 347
 348                 total_bytes += skb->len;
 349                 total_packets++;
 350
 351                 igbvf_rx_checksum_adv(adapter, staterr, skb);
 352
 353                 skb->protocol = eth_type_trans(skb, netdev);
 354
 355                 igbvf_receive_skb(adapter, netdev, skb, staterr,
 356                                   rx_desc->wb.upper.vlan);
 357
 358 next_desc:
 359                 rx_desc->wb.upper.status_error = 0;
 360
 361                 /* return some buffers to hardware, one at a time is too slow */
 362                 if (cleaned_count >= IGBVF_RX_BUFFER_WRITE) {
 363                         igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
 364                         cleaned_count = 0;
 365                 }
 366
 367                 /* use prefetched values */
 368                 rx_desc = next_rxd;
 369                 buffer_info = next_buffer;
 370
 371                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 372         }
 373
 374         rx_ring->next_to_clean = i;
 375         cleaned_count = igbvf_desc_unused(rx_ring);
 376
 377         if (cleaned_count)
 378                 igbvf_alloc_rx_buffers(rx_ring, cleaned_count);
 379
 380         adapter->total_rx_packets += total_packets;
 381         adapter->total_rx_bytes += total_bytes;
 382         netdev->stats.rx_bytes += total_bytes;
 383         netdev->stats.rx_packets += total_packets;
 384         return cleaned;
 385 }
 386
 387 static void igbvf_put_txbuf(struct igbvf_adapter *adapter,
 388                             struct igbvf_buffer *buffer_info)
 389 {
 390         if (buffer_info->dma) {
 391                 if (buffer_info->mapped_as_page)
 392                         dma_unmap_page(&adapter->pdev->dev,
 393                                        buffer_info->dma,
 394                                        buffer_info->length,
 395                                        DMA_TO_DEVICE);
 396                 else
 397                         dma_unmap_single(&adapter->pdev->dev,
 398                                          buffer_info->dma,
 399                                          buffer_info->length,
 400                                          DMA_TO_DEVICE);
 401                 buffer_info->dma = 0;
 402         }
 403         if (buffer_info->skb) {
 404                 dev_kfree_skb_any(buffer_info->skb);
 405                 buffer_info->skb = NULL;
 406         }
 407         buffer_info->time_stamp = 0;
 408 }
 409
 410 /**
 411  * igbvf_setup_tx_resources - allocate Tx resources (Descriptors)
 412  * @adapter: board private structure
 413  * @tx_ring: ring being initialized
 414  *
 415  * Return 0 on success, negative on failure
 416  **/
 417 int igbvf_setup_tx_resources(struct igbvf_adapter *adapter,
 418                              struct igbvf_ring *tx_ring)
 419 {
 420         struct pci_dev *pdev = adapter->pdev;
 421         int size;
 422
 423         size = sizeof(struct igbvf_buffer) * tx_ring->count;
 424         tx_ring->buffer_info = vzalloc(size);
 425         if (!tx_ring->buffer_info)
 426                 goto err;
 427
 428         /* round up to nearest 4K */
 429         tx_ring->size = tx_ring->count * sizeof(union e1000_adv_tx_desc);
 430         tx_ring->size = ALIGN(tx_ring->size, 4096);
 431
 432         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
 433                                            &tx_ring->dma, GFP_KERNEL);
 434         if (!tx_ring->desc)
 435                 goto err;
 436
 437         tx_ring->adapter = adapter;
 438         tx_ring->next_to_use = 0;
 439         tx_ring->next_to_clean = 0;
 440
 441         return 0;
 442 err:
 443         vfree(tx_ring->buffer_info);
 444         dev_err(&adapter->pdev->dev,
 445                 "Unable to allocate memory for the transmit descriptor ring\n");
 446         return -ENOMEM;
 447 }
 448
 449 /**
 450  * igbvf_setup_rx_resources - allocate Rx resources (Descriptors)
 451  * @adapter: board private structure
 452  * @rx_ring: ring being initialized
 453  *
 454  * Returns 0 on success, negative on failure
 455  **/
 456 int igbvf_setup_rx_resources(struct igbvf_adapter *adapter,
 457                              struct igbvf_ring *rx_ring)
 458 {
 459         struct pci_dev *pdev = adapter->pdev;
 460         int size, desc_len;
 461
 462         size = sizeof(struct igbvf_buffer) * rx_ring->count;
 463         rx_ring->buffer_info = vzalloc(size);
 464         if (!rx_ring->buffer_info)
 465                 goto err;
 466
 467         desc_len = sizeof(union e1000_adv_rx_desc);
 468
 469         /* Round up to nearest 4K */
 470         rx_ring->size = rx_ring->count * desc_len;
 471         rx_ring->size = ALIGN(rx_ring->size, 4096);
 472
 473         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
 474                                            &rx_ring->dma, GFP_KERNEL);
 475         if (!rx_ring->desc)
 476                 goto err;
 477
 478         rx_ring->next_to_clean = 0;
 479         rx_ring->next_to_use = 0;
 480
 481         rx_ring->adapter = adapter;
 482
 483         return 0;
 484
 485 err:
 486         vfree(rx_ring->buffer_info);
 487         rx_ring->buffer_info = NULL;
 488         dev_err(&adapter->pdev->dev,
 489                 "Unable to allocate memory for the receive descriptor ring\n");
 490         return -ENOMEM;
 491 }
 492
 493 /**
 494  * igbvf_clean_tx_ring - Free Tx Buffers
 495  * @tx_ring: ring to be cleaned
 496  **/
 497 static void igbvf_clean_tx_ring(struct igbvf_ring *tx_ring)
 498 {
 499         struct igbvf_adapter *adapter = tx_ring->adapter;
 500         struct igbvf_buffer *buffer_info;
 501         unsigned long size;
 502         unsigned int i;
 503
 504         if (!tx_ring->buffer_info)
 505                 return;
 506
 507         /* Free all the Tx ring sk_buffs */
 508         for (i = 0; i < tx_ring->count; i++) {
 509                 buffer_info = &tx_ring->buffer_info[i];
 510                 igbvf_put_txbuf(adapter, buffer_info);
 511         }
 512
 513         size = sizeof(struct igbvf_buffer) * tx_ring->count;
 514         memset(tx_ring->buffer_info, 0, size);
 515
 516         /* Zero out the descriptor ring */
 517         memset(tx_ring->desc, 0, tx_ring->size);
 518
 519         tx_ring->next_to_use = 0;
 520         tx_ring->next_to_clean = 0;
 521
 522         writel(0, adapter->hw.hw_addr + tx_ring->head);
 523         writel(0, adapter->hw.hw_addr + tx_ring->tail);
 524 }
 525
 526 /**
 527  * igbvf_free_tx_resources - Free Tx Resources per Queue
 528  * @tx_ring: ring to free resources from
 529  *
 530  * Free all transmit software resources
 531  **/
 532 void igbvf_free_tx_resources(struct igbvf_ring *tx_ring)
 533 {
 534         struct pci_dev *pdev = tx_ring->adapter->pdev;
 535
 536         igbvf_clean_tx_ring(tx_ring);
 537
 538         vfree(tx_ring->buffer_info);
 539         tx_ring->buffer_info = NULL;
 540
 541         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
 542                           tx_ring->dma);
 543
 544         tx_ring->desc = NULL;
 545 }
 546
 547 /**
 548  * igbvf_clean_rx_ring - Free Rx Buffers per Queue
 549  * @rx_ring: ring structure pointer to free buffers from
 550  **/
 551 static void igbvf_clean_rx_ring(struct igbvf_ring *rx_ring)
 552 {
 553         struct igbvf_adapter *adapter = rx_ring->adapter;
 554         struct igbvf_buffer *buffer_info;
 555         struct pci_dev *pdev = adapter->pdev;
 556         unsigned long size;
 557         unsigned int i;
 558
 559         if (!rx_ring->buffer_info)
 560                 return;
 561
 562         /* Free all the Rx ring sk_buffs */
 563         for (i = 0; i < rx_ring->count; i++) {
 564                 buffer_info = &rx_ring->buffer_info[i];
 565                 if (buffer_info->dma) {
 566                         if (adapter->rx_ps_hdr_size) {
 567                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
 568                                                  adapter->rx_ps_hdr_size,
 569                                                  DMA_FROM_DEVICE);
 570                         } else {
 571                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
 572                                                  adapter->rx_buffer_len,
 573                                                  DMA_FROM_DEVICE);
 574                         }
 575                         buffer_info->dma = 0;
 576                 }
 577
 578                 if (buffer_info->skb) {
 579                         dev_kfree_skb(buffer_info->skb);
 580                         buffer_info->skb = NULL;
 581                 }
 582
 583                 if (buffer_info->page) {
 584                         if (buffer_info->page_dma)
 585                                 dma_unmap_page(&pdev->dev,
 586                                                buffer_info->page_dma,
 587                                                PAGE_SIZE / 2,
 588                                                DMA_FROM_DEVICE);
 589                         put_page(buffer_info->page);
 590                         buffer_info->page = NULL;
 591                         buffer_info->page_dma = 0;
 592                         buffer_info->page_offset = 0;
 593                 }
 594         }
 595
 596         size = sizeof(struct igbvf_buffer) * rx_ring->count;
 597         memset(rx_ring->buffer_info, 0, size);
 598
 599         /* Zero out the descriptor ring */
 600         memset(rx_ring->desc, 0, rx_ring->size);
 601
 602         rx_ring->next_to_clean = 0;
 603         rx_ring->next_to_use = 0;
 604
 605         writel(0, adapter->hw.hw_addr + rx_ring->head);
 606         writel(0, adapter->hw.hw_addr + rx_ring->tail);
 607 }
 608
 609 /**
 610  * igbvf_free_rx_resources - Free Rx Resources
 611  * @rx_ring: ring to clean the resources from
 612  *
 613  * Free all receive software resources
 614  **/
 615
 616 void igbvf_free_rx_resources(struct igbvf_ring *rx_ring)
 617 {
 618         struct pci_dev *pdev = rx_ring->adapter->pdev;
 619
 620         igbvf_clean_rx_ring(rx_ring);
 621
 622         vfree(rx_ring->buffer_info);
 623         rx_ring->buffer_info = NULL;
 624
 625         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
 626                           rx_ring->dma);
 627         rx_ring->desc = NULL;
 628 }
 629
 630 /**
 631  * igbvf_update_itr - update the dynamic ITR value based on statistics
 632  * @adapter: pointer to adapter
 633  * @itr_setting: current adapter->itr
 634  * @packets: the number of packets during this measurement interval
 635  * @bytes: the number of bytes during this measurement interval
 636  *
 637  * Stores a new ITR value based on packets and byte counts during the last
 638  * interrupt.  The advantage of per interrupt computation is faster updates
 639  * and more accurate ITR for the current traffic pattern.  Constants in this
 640  * function were computed based on theoretical maximum wire speed and thresholds
 641  * were set based on testing data as well as attempting to minimize response
 642  * time while increasing bulk throughput.
 643  **/
 644 static enum latency_range igbvf_update_itr(struct igbvf_adapter *adapter,
 645                                            enum latency_range itr_setting,
 646                                            int packets, int bytes)
 647 {
 648         enum latency_range retval = itr_setting;
 649
 650         if (packets == 0)
 651                 goto update_itr_done;
 652
 653         switch (itr_setting) {
 654         case lowest_latency:
 655                 /* handle TSO and jumbo frames */
 656                 if (bytes/packets > 8000)
 657                         retval = bulk_latency;
 658                 else if ((packets < 5) && (bytes > 512))
 659                         retval = low_latency;
 660                 break;
 661         case low_latency:  /* 50 usec aka 20000 ints/s */
 662                 if (bytes > 10000) {
 663                         /* this if handles the TSO accounting */
 664                         if (bytes/packets > 8000)
 665                                 retval = bulk_latency;
 666                         else if ((packets < 10) || ((bytes/packets) > 1200))
 667                                 retval = bulk_latency;
 668                         else if ((packets > 35))
 669                                 retval = lowest_latency;
 670                 } else if (bytes/packets > 2000) {
 671                         retval = bulk_latency;
 672                 } else if (packets <= 2 && bytes < 512) {
 673                         retval = lowest_latency;
 674                 }
 675                 break;
 676         case bulk_latency: /* 250 usec aka 4000 ints/s */
 677                 if (bytes > 25000) {
 678                         if (packets > 35)
 679                                 retval = low_latency;
 680                 } else if (bytes < 6000) {
 681                         retval = low_latency;
 682                 }
 683                 break;
 684         default:
 685                 break;
 686         }
 687
 688 update_itr_done:
 689         return retval;
 690 }
 691
 692 static int igbvf_range_to_itr(enum latency_range current_range)
 693 {
 694         int new_itr;
 695
 696         switch (current_range) {
 697         /* counts and packets in update_itr are dependent on these numbers */
 698         case lowest_latency:
 699                 new_itr = IGBVF_70K_ITR;
 700                 break;
 701         case low_latency:
 702                 new_itr = IGBVF_20K_ITR;
 703                 break;
 704         case bulk_latency:
 705                 new_itr = IGBVF_4K_ITR;
 706                 break;
 707         default:
 708                 new_itr = IGBVF_START_ITR;
 709                 break;
 710         }
 711         return new_itr;
 712 }
 713
 714 static void igbvf_set_itr(struct igbvf_adapter *adapter)
 715 {
 716         u32 new_itr;
 717
 718         adapter->tx_ring->itr_range =
 719                         igbvf_update_itr(adapter,
 720                                          adapter->tx_ring->itr_val,
 721                                          adapter->total_tx_packets,
 722                                          adapter->total_tx_bytes);
 723
 724         /* conservative mode (itr 3) eliminates the lowest_latency setting */
 725         if (adapter->requested_itr == 3 &&
 726             adapter->tx_ring->itr_range == lowest_latency)
 727                 adapter->tx_ring->itr_range = low_latency;
 728
 729         new_itr = igbvf_range_to_itr(adapter->tx_ring->itr_range);
 730
 731         if (new_itr != adapter->tx_ring->itr_val) {
 732                 u32 current_itr = adapter->tx_ring->itr_val;
 733                 /* this attempts to bias the interrupt rate towards Bulk
 734                  * by adding intermediate steps when interrupt rate is
 735                  * increasing
 736                  */
 737                 new_itr = new_itr > current_itr ?
 738                           min(current_itr + (new_itr >> 2), new_itr) :
 739                           new_itr;
 740                 adapter->tx_ring->itr_val = new_itr;
 741
 742                 adapter->tx_ring->set_itr = 1;
 743         }
 744
 745         adapter->rx_ring->itr_range =
 746                         igbvf_update_itr(adapter, adapter->rx_ring->itr_val,
 747                                          adapter->total_rx_packets,
 748                                          adapter->total_rx_bytes);
 749         if (adapter->requested_itr == 3 &&
 750             adapter->rx_ring->itr_range == lowest_latency)
 751                 adapter->rx_ring->itr_range = low_latency;
 752
 753         new_itr = igbvf_range_to_itr(adapter->rx_ring->itr_range);
 754
 755         if (new_itr != adapter->rx_ring->itr_val) {
 756                 u32 current_itr = adapter->rx_ring->itr_val;
 757
 758                 new_itr = new_itr > current_itr ?
 759                           min(current_itr + (new_itr >> 2), new_itr) :
 760                           new_itr;
 761                 adapter->rx_ring->itr_val = new_itr;
 762
 763                 adapter->rx_ring->set_itr = 1;
 764         }
 765 }
 766
 767 /**
 768  * igbvf_clean_tx_irq - Reclaim resources after transmit completes
 769  * @tx_ring: ring structure to clean descriptors from
 770  *
 771  * returns true if ring is completely cleaned
 772  **/
 773 static bool igbvf_clean_tx_irq(struct igbvf_ring *tx_ring)
 774 {
 775         struct igbvf_adapter *adapter = tx_ring->adapter;
 776         struct net_device *netdev = adapter->netdev;
 777         struct igbvf_buffer *buffer_info;
 778         struct sk_buff *skb;
 779         union e1000_adv_tx_desc *tx_desc, *eop_desc;
 780         unsigned int total_bytes = 0, total_packets = 0;
 781         unsigned int i, count = 0;
 782         bool cleaned = false;
 783
 784         i = tx_ring->next_to_clean;
 785         buffer_info = &tx_ring->buffer_info[i];
 786         eop_desc = buffer_info->next_to_watch;
 787
 788         do {
 789                 /* if next_to_watch is not set then there is no work pending */
 790                 if (!eop_desc)
 791                         break;
 792
 793                 /* prevent any other reads prior to eop_desc */
 794                 smp_rmb();
 795
 796                 /* if DD is not set pending work has not been completed */
 797                 if (!(eop_desc->wb.status & cpu_to_le32(E1000_TXD_STAT_DD)))
 798                         break;
 799
 800                 /* clear next_to_watch to prevent false hangs */
 801                 buffer_info->next_to_watch = NULL;
 802
 803                 for (cleaned = false; !cleaned; count++) {
 804                         tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
 805                         cleaned = (tx_desc == eop_desc);
 806                         skb = buffer_info->skb;
 807
 808                         if (skb) {
 809                                 unsigned int segs, bytecount;
 810
 811                                 /* gso_segs is currently only valid for tcp */
 812                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 813                                 /* multiply data chunks by size of headers */
 814                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 815                                             skb->len;
 816                                 total_packets += segs;
 817                                 total_bytes += bytecount;
 818                         }
 819
 820                         igbvf_put_txbuf(adapter, buffer_info);
 821                         tx_desc->wb.status = 0;
 822
 823                         i++;
 824                         if (i == tx_ring->count)
 825                                 i = 0;
 826
 827                         buffer_info = &tx_ring->buffer_info[i];
 828                 }
 829
 830                 eop_desc = buffer_info->next_to_watch;
 831         } while (count < tx_ring->count);
 832
 833         tx_ring->next_to_clean = i;
 834
 835         if (unlikely(count && netif_carrier_ok(netdev) &&
 836             igbvf_desc_unused(tx_ring) >= IGBVF_TX_QUEUE_WAKE)) {
 837                 /* Make sure that anybody stopping the queue after this
 838                  * sees the new next_to_clean.
 839                  */
 840                 smp_mb();
 841                 if (netif_queue_stopped(netdev) &&
 842                     !(test_bit(__IGBVF_DOWN, &adapter->state))) {
 843                         netif_wake_queue(netdev);
 844                         ++adapter->restart_queue;
 845                 }
 846         }
 847
 848         netdev->stats.tx_bytes += total_bytes;
 849         netdev->stats.tx_packets += total_packets;
 850         return count < tx_ring->count;
 851 }
 852
 853 static irqreturn_t igbvf_msix_other(int irq, void *data)
 854 {
 855         struct net_device *netdev = data;
 856         struct igbvf_adapter *adapter = netdev_priv(netdev);
 857         struct e1000_hw *hw = &adapter->hw;
 858
 859         adapter->int_counter1++;
 860
 861         hw->mac.get_link_status = 1;
 862         if (!test_bit(__IGBVF_DOWN, &adapter->state))
 863                 mod_timer(&adapter->watchdog_timer, jiffies + 1);
 864
 865         ew32(EIMS, adapter->eims_other);
 866
 867         return IRQ_HANDLED;
 868 }
 869
 870 static irqreturn_t igbvf_intr_msix_tx(int irq, void *data)
 871 {
 872         struct net_device *netdev = data;
 873         struct igbvf_adapter *adapter = netdev_priv(netdev);
 874         struct e1000_hw *hw = &adapter->hw;
 875         struct igbvf_ring *tx_ring = adapter->tx_ring;
 876
 877         if (tx_ring->set_itr) {
 878                 writel(tx_ring->itr_val,
 879                        adapter->hw.hw_addr + tx_ring->itr_register);
 880                 adapter->tx_ring->set_itr = 0;
 881         }
 882
 883         adapter->total_tx_bytes = 0;
 884         adapter->total_tx_packets = 0;
 885
 886         /* auto mask will automatically re-enable the interrupt when we write
 887          * EICS
 888          */
 889         if (!igbvf_clean_tx_irq(tx_ring))
 890                 /* Ring was not completely cleaned, so fire another interrupt */
 891                 ew32(EICS, tx_ring->eims_value);
 892         else
 893                 ew32(EIMS, tx_ring->eims_value);
 894
 895         return IRQ_HANDLED;
 896 }
 897
 898 static irqreturn_t igbvf_intr_msix_rx(int irq, void *data)
 899 {
 900         struct net_device *netdev = data;
 901         struct igbvf_adapter *adapter = netdev_priv(netdev);
 902
 903         adapter->int_counter0++;
 904
 905         /* Write the ITR value calculated at the end of the
 906          * previous interrupt.
 907          */
 908         if (adapter->rx_ring->set_itr) {
 909                 writel(adapter->rx_ring->itr_val,
 910                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
 911                 adapter->rx_ring->set_itr = 0;
 912         }
 913
 914         if (napi_schedule_prep(&adapter->rx_ring->napi)) {
 915                 adapter->total_rx_bytes = 0;
 916                 adapter->total_rx_packets = 0;
 917                 __napi_schedule(&adapter->rx_ring->napi);
 918         }
 919
 920         return IRQ_HANDLED;
 921 }
 922
 923 #define IGBVF_NO_QUEUE -1
 924
 925 static void igbvf_assign_vector(struct igbvf_adapter *adapter, int rx_queue,
 926                                 int tx_queue, int msix_vector)
 927 {
 928         struct e1000_hw *hw = &adapter->hw;
 929         u32 ivar, index;
 930
 931         /* 82576 uses a table-based method for assigning vectors.
 932          * Each queue has a single entry in the table to which we write
 933          * a vector number along with a "valid" bit.  Sadly, the layout
 934          * of the table is somewhat counterintuitive.
 935          */
 936         if (rx_queue > IGBVF_NO_QUEUE) {
 937                 index = (rx_queue >> 1);
 938                 ivar = array_er32(IVAR0, index);
 939                 if (rx_queue & 0x1) {
 940                         /* vector goes into third byte of register */
 941                         ivar = ivar & 0xFF00FFFF;
 942                         ivar |= (msix_vector | E1000_IVAR_VALID) << 16;
 943                 } else {
 944                         /* vector goes into low byte of register */
 945                         ivar = ivar & 0xFFFFFF00;
 946                         ivar |= msix_vector | E1000_IVAR_VALID;
 947                 }
 948                 adapter->rx_ring[rx_queue].eims_value = BIT(msix_vector);
 949                 array_ew32(IVAR0, index, ivar);
 950         }
 951         if (tx_queue > IGBVF_NO_QUEUE) {
 952                 index = (tx_queue >> 1);
 953                 ivar = array_er32(IVAR0, index);
 954                 if (tx_queue & 0x1) {
 955                         /* vector goes into high byte of register */
 956                         ivar = ivar & 0x00FFFFFF;
 957                         ivar |= (msix_vector | E1000_IVAR_VALID) << 24;
 958                 } else {
 959                         /* vector goes into second byte of register */
 960                         ivar = ivar & 0xFFFF00FF;
 961                         ivar |= (msix_vector | E1000_IVAR_VALID) << 8;
 962                 }
 963                 adapter->tx_ring[tx_queue].eims_value = BIT(msix_vector);
 964                 array_ew32(IVAR0, index, ivar);
 965         }
 966 }
 967
 968 /**
 969  * igbvf_configure_msix - Configure MSI-X hardware
 970  * @adapter: board private structure
 971  *
 972  * igbvf_configure_msix sets up the hardware to properly
 973  * generate MSI-X interrupts.
 974  **/
 975 static void igbvf_configure_msix(struct igbvf_adapter *adapter)
 976 {
 977         u32 tmp;
 978         struct e1000_hw *hw = &adapter->hw;
 979         struct igbvf_ring *tx_ring = adapter->tx_ring;
 980         struct igbvf_ring *rx_ring = adapter->rx_ring;
 981         int vector = 0;
 982
 983         adapter->eims_enable_mask = 0;
 984
 985         igbvf_assign_vector(adapter, IGBVF_NO_QUEUE, 0, vector++);
 986         adapter->eims_enable_mask |= tx_ring->eims_value;
 987         writel(tx_ring->itr_val, hw->hw_addr + tx_ring->itr_register);
 988         igbvf_assign_vector(adapter, 0, IGBVF_NO_QUEUE, vector++);
 989         adapter->eims_enable_mask |= rx_ring->eims_value;
 990         writel(rx_ring->itr_val, hw->hw_addr + rx_ring->itr_register);
 991
 992         /* set vector for other causes, i.e. link changes */
 993
 994         tmp = (vector++ | E1000_IVAR_VALID);
 995
 996         ew32(IVAR_MISC, tmp);
 997
 998         adapter->eims_enable_mask = GENMASK(vector - 1, 0);
 999         adapter->eims_other = BIT(vector - 1);
1000         e1e_flush();
1001 }
1002
1003 static void igbvf_reset_interrupt_capability(struct igbvf_adapter *adapter)
1004 {
1005         if (adapter->msix_entries) {
1006                 pci_disable_msix(adapter->pdev);
1007                 kfree(adapter->msix_entries);
1008                 adapter->msix_entries = NULL;
1009         }
1010 }
1011
1012 /**
1013  * igbvf_set_interrupt_capability - set MSI or MSI-X if supported
1014  * @adapter: board private structure
1015  *
1016  * Attempt to configure interrupts using the best available
1017  * capabilities of the hardware and kernel.
1018  **/
1019 static void igbvf_set_interrupt_capability(struct igbvf_adapter *adapter)
1020 {
1021         int err = -ENOMEM;
1022         int i;
1023
1024         /* we allocate 3 vectors, 1 for Tx, 1 for Rx, one for PF messages */
1025         adapter->msix_entries = kcalloc(3, sizeof(struct msix_entry),
1026                                         GFP_KERNEL);
1027         if (adapter->msix_entries) {
1028                 for (i = 0; i < 3; i++)
1029                         adapter->msix_entries[i].entry = i;
1030
1031                 err = pci_enable_msix_range(adapter->pdev,
1032                                             adapter->msix_entries, 3, 3);
1033         }
1034
1035         if (err < 0) {
1036                 /* MSI-X failed */
1037                 dev_err(&adapter->pdev->dev,
1038                         "Failed to initialize MSI-X interrupts.\n");
1039                 igbvf_reset_interrupt_capability(adapter);
1040         }
1041 }
1042
1043 /**
1044  * igbvf_request_msix - Initialize MSI-X interrupts
1045  * @adapter: board private structure
1046  *
1047  * igbvf_request_msix allocates MSI-X vectors and requests interrupts from the
1048  * kernel.
1049  **/
1050 static int igbvf_request_msix(struct igbvf_adapter *adapter)
1051 {
1052         struct net_device *netdev = adapter->netdev;
1053         int err = 0, vector = 0;
1054
1055         if (strlen(netdev->name) < (IFNAMSIZ - 5)) {
1056                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1057                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1058         } else {
1059                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1060                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1061         }
1062
1063         err = request_irq(adapter->msix_entries[vector].vector,
1064                           igbvf_intr_msix_tx, 0, adapter->tx_ring->name,
1065                           netdev);
1066         if (err)
1067                 goto out;
1068
1069         adapter->tx_ring->itr_register = E1000_EITR(vector);
1070         adapter->tx_ring->itr_val = adapter->current_itr;
1071         vector++;
1072
1073         err = request_irq(adapter->msix_entries[vector].vector,
1074                           igbvf_intr_msix_rx, 0, adapter->rx_ring->name,
1075                           netdev);
1076         if (err)
1077                 goto free_irq_tx;
1078
1079         adapter->rx_ring->itr_register = E1000_EITR(vector);
1080         adapter->rx_ring->itr_val = adapter->current_itr;
1081         vector++;
1082
1083         err = request_irq(adapter->msix_entries[vector].vector,
1084                           igbvf_msix_other, 0, netdev->name, netdev);
1085         if (err)
1086                 goto free_irq_rx;
1087
1088         igbvf_configure_msix(adapter);
1089         return 0;
1090 free_irq_rx:
1091         free_irq(adapter->msix_entries[--vector].vector, netdev);
1092 free_irq_tx:
1093         free_irq(adapter->msix_entries[--vector].vector, netdev);
1094 out:
1095         return err;
1096 }
1097
1098 /**
1099  * igbvf_alloc_queues - Allocate memory for all rings
1100  * @adapter: board private structure to initialize
1101  **/
1102 static int igbvf_alloc_queues(struct igbvf_adapter *adapter)
1103 {
1104         struct net_device *netdev = adapter->netdev;
1105
1106         adapter->tx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1107         if (!adapter->tx_ring)
1108                 return -ENOMEM;
1109
1110         adapter->rx_ring = kzalloc(sizeof(struct igbvf_ring), GFP_KERNEL);
1111         if (!adapter->rx_ring) {
1112                 kfree(adapter->tx_ring);
1113                 return -ENOMEM;
1114         }
1115
1116         netif_napi_add(netdev, &adapter->rx_ring->napi, igbvf_poll, 64);
1117
1118         return 0;
1119 }
1120
1121 /**
1122  * igbvf_request_irq - initialize interrupts
1123  * @adapter: board private structure
1124  *
1125  * Attempts to configure interrupts using the best available
1126  * capabilities of the hardware and kernel.
1127  **/
1128 static int igbvf_request_irq(struct igbvf_adapter *adapter)
1129 {
1130         int err = -1;
1131
1132         /* igbvf supports msi-x only */
1133         if (adapter->msix_entries)
1134                 err = igbvf_request_msix(adapter);
1135
1136         if (!err)
1137                 return err;
1138
1139         dev_err(&adapter->pdev->dev,
1140                 "Unable to allocate interrupt, Error: %d\n", err);
1141
1142         return err;
1143 }
1144
1145 static void igbvf_free_irq(struct igbvf_adapter *adapter)
1146 {
1147         struct net_device *netdev = adapter->netdev;
1148         int vector;
1149
1150         if (adapter->msix_entries) {
1151                 for (vector = 0; vector < 3; vector++)
1152                         free_irq(adapter->msix_entries[vector].vector, netdev);
1153         }
1154 }
1155
1156 /**
1157  * igbvf_irq_disable - Mask off interrupt generation on the NIC
1158  * @adapter: board private structure
1159  **/
1160 static void igbvf_irq_disable(struct igbvf_adapter *adapter)
1161 {
1162         struct e1000_hw *hw = &adapter->hw;
1163
1164         ew32(EIMC, ~0);
1165
1166         if (adapter->msix_entries)
1167                 ew32(EIAC, 0);
1168 }
1169
1170 /**
1171  * igbvf_irq_enable - Enable default interrupt generation settings
1172  * @adapter: board private structure
1173  **/
1174 static void igbvf_irq_enable(struct igbvf_adapter *adapter)
1175 {
1176         struct e1000_hw *hw = &adapter->hw;
1177
1178         ew32(EIAC, adapter->eims_enable_mask);
1179         ew32(EIAM, adapter->eims_enable_mask);
1180         ew32(EIMS, adapter->eims_enable_mask);
1181 }
1182
1183 /**
1184  * igbvf_poll - NAPI Rx polling callback
1185  * @napi: struct associated with this polling callback
1186  * @budget: amount of packets driver is allowed to process this poll
1187  **/
1188 static int igbvf_poll(struct napi_struct *napi, int budget)
1189 {
1190         struct igbvf_ring *rx_ring = container_of(napi, struct igbvf_ring, napi);
1191         struct igbvf_adapter *adapter = rx_ring->adapter;
1192         struct e1000_hw *hw = &adapter->hw;
1193         int work_done = 0;
1194
1195         igbvf_clean_rx_irq(adapter, &work_done, budget);
1196
1197         if (work_done == budget)
1198                 return budget;
1199
1200         /* Exit the polling mode, but don't re-enable interrupts if stack might
1201          * poll us due to busy-polling
1202          */
1203         if (likely(napi_complete_done(napi, work_done))) {
1204                 if (adapter->requested_itr & 3)
1205                         igbvf_set_itr(adapter);
1206
1207                 if (!test_bit(__IGBVF_DOWN, &adapter->state))
1208                         ew32(EIMS, adapter->rx_ring->eims_value);
1209         }
1210
1211         return work_done;
1212 }
1213
1214 /**
1215  * igbvf_set_rlpml - set receive large packet maximum length
1216  * @adapter: board private structure
1217  *
1218  * Configure the maximum size of packets that will be received
1219  */
1220 static void igbvf_set_rlpml(struct igbvf_adapter *adapter)
1221 {
1222         int max_frame_size;
1223         struct e1000_hw *hw = &adapter->hw;
1224
1225         max_frame_size = adapter->max_frame_size + VLAN_TAG_SIZE;
1226
1227         spin_lock_bh(&hw->mbx_lock);
1228
1229         e1000_rlpml_set_vf(hw, max_frame_size);
1230
1231         spin_unlock_bh(&hw->mbx_lock);
1232 }
1233
1234 static int igbvf_vlan_rx_add_vid(struct net_device *netdev,
1235                                  __be16 proto, u16 vid)
1236 {
1237         struct igbvf_adapter *adapter = netdev_priv(netdev);
1238         struct e1000_hw *hw = &adapter->hw;
1239
1240         spin_lock_bh(&hw->mbx_lock);
1241
1242         if (hw->mac.ops.set_vfta(hw, vid, true)) {
1243                 dev_err(&adapter->pdev->dev, "Failed to add vlan id %d\n", vid);
1244                 spin_unlock_bh(&hw->mbx_lock);
1245                 return -EINVAL;
1246         }
1247
1248         spin_unlock_bh(&hw->mbx_lock);
1249
1250         set_bit(vid, adapter->active_vlans);
1251         return 0;
1252 }
1253
1254 static int igbvf_vlan_rx_kill_vid(struct net_device *netdev,
1255                                   __be16 proto, u16 vid)
1256 {
1257         struct igbvf_adapter *adapter = netdev_priv(netdev);
1258         struct e1000_hw *hw = &adapter->hw;
1259
1260         spin_lock_bh(&hw->mbx_lock);
1261
1262         if (hw->mac.ops.set_vfta(hw, vid, false)) {
1263                 dev_err(&adapter->pdev->dev,
1264                         "Failed to remove vlan id %d\n", vid);
1265                 spin_unlock_bh(&hw->mbx_lock);
1266                 return -EINVAL;
1267         }
1268
1269         spin_unlock_bh(&hw->mbx_lock);
1270
1271         clear_bit(vid, adapter->active_vlans);
1272         return 0;
1273 }
1274
1275 static void igbvf_restore_vlan(struct igbvf_adapter *adapter)
1276 {
1277         u16 vid;
1278
1279         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
1280                 igbvf_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
1281 }
1282
1283 /**
1284  * igbvf_configure_tx - Configure Transmit Unit after Reset
1285  * @adapter: board private structure
1286  *
1287  * Configure the Tx unit of the MAC after a reset.
1288  **/
1289 static void igbvf_configure_tx(struct igbvf_adapter *adapter)
1290 {
1291         struct e1000_hw *hw = &adapter->hw;
1292         struct igbvf_ring *tx_ring = adapter->tx_ring;
1293         u64 tdba;
1294         u32 txdctl, dca_txctrl;
1295
1296         /* disable transmits */
1297         txdctl = er32(TXDCTL(0));
1298         ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1299         e1e_flush();
1300         msleep(10);
1301
1302         /* Setup the HW Tx Head and Tail descriptor pointers */
1303         ew32(TDLEN(0), tx_ring->count * sizeof(union e1000_adv_tx_desc));
1304         tdba = tx_ring->dma;
1305         ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
1306         ew32(TDBAH(0), (tdba >> 32));
1307         ew32(TDH(0), 0);
1308         ew32(TDT(0), 0);
1309         tx_ring->head = E1000_TDH(0);
1310         tx_ring->tail = E1000_TDT(0);
1311
1312         /* Turn off Relaxed Ordering on head write-backs.  The writebacks
1313          * MUST be delivered in order or it will completely screw up
1314          * our bookkeeping.
1315          */
1316         dca_txctrl = er32(DCA_TXCTRL(0));
1317         dca_txctrl &= ~E1000_DCA_TXCTRL_TX_WB_RO_EN;
1318         ew32(DCA_TXCTRL(0), dca_txctrl);
1319
1320         /* enable transmits */
1321         txdctl |= E1000_TXDCTL_QUEUE_ENABLE;
1322         ew32(TXDCTL(0), txdctl);
1323
1324         /* Setup Transmit Descriptor Settings for eop descriptor */
1325         adapter->txd_cmd = E1000_ADVTXD_DCMD_EOP | E1000_ADVTXD_DCMD_IFCS;
1326
1327         /* enable Report Status bit */
1328         adapter->txd_cmd |= E1000_ADVTXD_DCMD_RS;
1329 }
1330
1331 /**
1332  * igbvf_setup_srrctl - configure the receive control registers
1333  * @adapter: Board private structure
1334  **/
1335 static void igbvf_setup_srrctl(struct igbvf_adapter *adapter)
1336 {
1337         struct e1000_hw *hw = &adapter->hw;
1338         u32 srrctl = 0;
1339
1340         srrctl &= ~(E1000_SRRCTL_DESCTYPE_MASK |
1341                     E1000_SRRCTL_BSIZEHDR_MASK |
1342                     E1000_SRRCTL_BSIZEPKT_MASK);
1343
1344         /* Enable queue drop to avoid head of line blocking */
1345         srrctl |= E1000_SRRCTL_DROP_EN;
1346
1347         /* Setup buffer sizes */
1348         srrctl |= ALIGN(adapter->rx_buffer_len, 1024) >>
1349                   E1000_SRRCTL_BSIZEPKT_SHIFT;
1350
1351         if (adapter->rx_buffer_len < 2048) {
1352                 adapter->rx_ps_hdr_size = 0;
1353                 srrctl |= E1000_SRRCTL_DESCTYPE_ADV_ONEBUF;
1354         } else {
1355                 adapter->rx_ps_hdr_size = 128;
1356                 srrctl |= adapter->rx_ps_hdr_size <<
1357                           E1000_SRRCTL_BSIZEHDRSIZE_SHIFT;
1358                 srrctl |= E1000_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1359         }
1360
1361         ew32(SRRCTL(0), srrctl);
1362 }
1363
1364 /**
1365  * igbvf_configure_rx - Configure Receive Unit after Reset
1366  * @adapter: board private structure
1367  *
1368  * Configure the Rx unit of the MAC after a reset.
1369  **/
1370 static void igbvf_configure_rx(struct igbvf_adapter *adapter)
1371 {
1372         struct e1000_hw *hw = &adapter->hw;
1373         struct igbvf_ring *rx_ring = adapter->rx_ring;
1374         u64 rdba;
1375         u32 rxdctl;
1376
1377         /* disable receives */
1378         rxdctl = er32(RXDCTL(0));
1379         ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1380         e1e_flush();
1381         msleep(10);
1382
1383         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1384          * the Base and Length of the Rx Descriptor Ring
1385          */
1386         rdba = rx_ring->dma;
1387         ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
1388         ew32(RDBAH(0), (rdba >> 32));
1389         ew32(RDLEN(0), rx_ring->count * sizeof(union e1000_adv_rx_desc));
1390         rx_ring->head = E1000_RDH(0);
1391         rx_ring->tail = E1000_RDT(0);
1392         ew32(RDH(0), 0);
1393         ew32(RDT(0), 0);
1394
1395         rxdctl |= E1000_RXDCTL_QUEUE_ENABLE;
1396         rxdctl &= 0xFFF00000;
1397         rxdctl |= IGBVF_RX_PTHRESH;
1398         rxdctl |= IGBVF_RX_HTHRESH << 8;
1399         rxdctl |= IGBVF_RX_WTHRESH << 16;
1400
1401         igbvf_set_rlpml(adapter);
1402
1403         /* enable receives */
1404         ew32(RXDCTL(0), rxdctl);
1405 }
1406
1407 /**
1408  * igbvf_set_multi - Multicast and Promiscuous mode set
1409  * @netdev: network interface device structure
1410  *
1411  * The set_multi entry point is called whenever the multicast address
1412  * list or the network interface flags are updated.  This routine is
1413  * responsible for configuring the hardware for proper multicast,
1414  * promiscuous mode, and all-multi behavior.
1415  **/
1416 static void igbvf_set_multi(struct net_device *netdev)
1417 {
1418         struct igbvf_adapter *adapter = netdev_priv(netdev);
1419         struct e1000_hw *hw = &adapter->hw;
1420         struct netdev_hw_addr *ha;
1421         u8  *mta_list = NULL;
1422         int i;
1423
1424         if (!netdev_mc_empty(netdev)) {
1425                 mta_list = kmalloc_array(netdev_mc_count(netdev), ETH_ALEN,
1426                                          GFP_ATOMIC);
1427                 if (!mta_list)
1428                         return;
1429         }
1430
1431         /* prepare a packed array of only addresses. */
1432         i = 0;
1433         netdev_for_each_mc_addr(ha, netdev)
1434                 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
1435
1436         spin_lock_bh(&hw->mbx_lock);
1437
1438         hw->mac.ops.update_mc_addr_list(hw, mta_list, i, 0, 0);
1439
1440         spin_unlock_bh(&hw->mbx_lock);
1441         kfree(mta_list);
1442 }
1443
1444 /**
1445  * igbvf_set_uni - Configure unicast MAC filters
1446  * @netdev: network interface device structure
1447  *
1448  * This routine is responsible for configuring the hardware for proper
1449  * unicast filters.
1450  **/
1451 static int igbvf_set_uni(struct net_device *netdev)
1452 {
1453         struct igbvf_adapter *adapter = netdev_priv(netdev);
1454         struct e1000_hw *hw = &adapter->hw;
1455
1456         if (netdev_uc_count(netdev) > IGBVF_MAX_MAC_FILTERS) {
1457                 pr_err("Too many unicast filters - No Space\n");
1458                 return -ENOSPC;
1459         }
1460
1461         spin_lock_bh(&hw->mbx_lock);
1462
1463         /* Clear all unicast MAC filters */
1464         hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_CLR, NULL);
1465
1466         spin_unlock_bh(&hw->mbx_lock);
1467
1468         if (!netdev_uc_empty(netdev)) {
1469                 struct netdev_hw_addr *ha;
1470
1471                 /* Add MAC filters one by one */
1472                 netdev_for_each_uc_addr(ha, netdev) {
1473                         spin_lock_bh(&hw->mbx_lock);
1474
1475                         hw->mac.ops.set_uc_addr(hw, E1000_VF_MAC_FILTER_ADD,
1476                                                 ha->addr);
1477
1478                         spin_unlock_bh(&hw->mbx_lock);
1479                         udelay(200);
1480                 }
1481         }
1482
1483         return 0;
1484 }
1485
1486 static void igbvf_set_rx_mode(struct net_device *netdev)
1487 {
1488         igbvf_set_multi(netdev);
1489         igbvf_set_uni(netdev);
1490 }
1491
1492 /**
1493  * igbvf_configure - configure the hardware for Rx and Tx
1494  * @adapter: private board structure
1495  **/
1496 static void igbvf_configure(struct igbvf_adapter *adapter)
1497 {
1498         igbvf_set_rx_mode(adapter->netdev);
1499
1500         igbvf_restore_vlan(adapter);
1501
1502         igbvf_configure_tx(adapter);
1503         igbvf_setup_srrctl(adapter);
1504         igbvf_configure_rx(adapter);
1505         igbvf_alloc_rx_buffers(adapter->rx_ring,
1506                                igbvf_desc_unused(adapter->rx_ring));
1507 }
1508
1509 /* igbvf_reset - bring the hardware into a known good state
1510  * @adapter: private board structure
1511  *
1512  * This function boots the hardware and enables some settings that
1513  * require a configuration cycle of the hardware - those cannot be
1514  * set/changed during runtime. After reset the device needs to be
1515  * properly configured for Rx, Tx etc.
1516  */
1517 static void igbvf_reset(struct igbvf_adapter *adapter)
1518 {
1519         struct e1000_mac_info *mac = &adapter->hw.mac;
1520         struct net_device *netdev = adapter->netdev;
1521         struct e1000_hw *hw = &adapter->hw;
1522
1523         spin_lock_bh(&hw->mbx_lock);
1524
1525         /* Allow time for pending master requests to run */
1526         if (mac->ops.reset_hw(hw))
1527                 dev_err(&adapter->pdev->dev, "PF still resetting\n");
1528
1529         mac->ops.init_hw(hw);
1530
1531         spin_unlock_bh(&hw->mbx_lock);
1532
1533         if (is_valid_ether_addr(adapter->hw.mac.addr)) {
1534                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
1535                        netdev->addr_len);
1536                 memcpy(netdev->perm_addr, adapter->hw.mac.addr,
1537                        netdev->addr_len);
1538         }
1539
1540         adapter->last_reset = jiffies;
1541 }
1542
1543 int igbvf_up(struct igbvf_adapter *adapter)
1544 {
1545         struct e1000_hw *hw = &adapter->hw;
1546
1547         /* hardware has been reset, we need to reload some things */
1548         igbvf_configure(adapter);
1549
1550         clear_bit(__IGBVF_DOWN, &adapter->state);
1551
1552         napi_enable(&adapter->rx_ring->napi);
1553         if (adapter->msix_entries)
1554                 igbvf_configure_msix(adapter);
1555
1556         /* Clear any pending interrupts. */
1557         er32(EICR);
1558         igbvf_irq_enable(adapter);
1559
1560         /* start the watchdog */
1561         hw->mac.get_link_status = 1;
1562         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1563
1564         return 0;
1565 }
1566
1567 void igbvf_down(struct igbvf_adapter *adapter)
1568 {
1569         struct net_device *netdev = adapter->netdev;
1570         struct e1000_hw *hw = &adapter->hw;
1571         u32 rxdctl, txdctl;
1572
1573         /* signal that we're down so the interrupt handler does not
1574          * reschedule our watchdog timer
1575          */
1576         set_bit(__IGBVF_DOWN, &adapter->state);
1577
1578         /* disable receives in the hardware */
1579         rxdctl = er32(RXDCTL(0));
1580         ew32(RXDCTL(0), rxdctl & ~E1000_RXDCTL_QUEUE_ENABLE);
1581
1582         netif_carrier_off(netdev);
1583         netif_stop_queue(netdev);
1584
1585         /* disable transmits in the hardware */
1586         txdctl = er32(TXDCTL(0));
1587         ew32(TXDCTL(0), txdctl & ~E1000_TXDCTL_QUEUE_ENABLE);
1588
1589         /* flush both disables and wait for them to finish */
1590         e1e_flush();
1591         msleep(10);
1592
1593         napi_disable(&adapter->rx_ring->napi);
1594
1595         igbvf_irq_disable(adapter);
1596
1597         del_timer_sync(&adapter->watchdog_timer);
1598
1599         /* record the stats before reset*/
1600         igbvf_update_stats(adapter);
1601
1602         adapter->link_speed = 0;
1603         adapter->link_duplex = 0;
1604
1605         igbvf_reset(adapter);
1606         igbvf_clean_tx_ring(adapter->tx_ring);
1607         igbvf_clean_rx_ring(adapter->rx_ring);
1608 }
1609
1610 void igbvf_reinit_locked(struct igbvf_adapter *adapter)
1611 {
1612         might_sleep();
1613         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
1614                 usleep_range(1000, 2000);
1615         igbvf_down(adapter);
1616         igbvf_up(adapter);
1617         clear_bit(__IGBVF_RESETTING, &adapter->state);
1618 }
1619
1620 /**
1621  * igbvf_sw_init - Initialize general software structures (struct igbvf_adapter)
1622  * @adapter: board private structure to initialize
1623  *
1624  * igbvf_sw_init initializes the Adapter private data structure.
1625  * Fields are initialized based on PCI device information and
1626  * OS network device settings (MTU size).
1627  **/
1628 static int igbvf_sw_init(struct igbvf_adapter *adapter)
1629 {
1630         struct net_device *netdev = adapter->netdev;
1631         s32 rc;
1632
1633         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
1634         adapter->rx_ps_hdr_size = 0;
1635         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1636         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
1637
1638         adapter->tx_int_delay = 8;
1639         adapter->tx_abs_int_delay = 32;
1640         adapter->rx_int_delay = 0;
1641         adapter->rx_abs_int_delay = 8;
1642         adapter->requested_itr = 3;
1643         adapter->current_itr = IGBVF_START_ITR;
1644
1645         /* Set various function pointers */
1646         adapter->ei->init_ops(&adapter->hw);
1647
1648         rc = adapter->hw.mac.ops.init_params(&adapter->hw);
1649         if (rc)
1650                 return rc;
1651
1652         rc = adapter->hw.mbx.ops.init_params(&adapter->hw);
1653         if (rc)
1654                 return rc;
1655
1656         igbvf_set_interrupt_capability(adapter);
1657
1658         if (igbvf_alloc_queues(adapter))
1659                 return -ENOMEM;
1660
1661         spin_lock_init(&adapter->tx_queue_lock);
1662
1663         /* Explicitly disable IRQ since the NIC can be in any state. */
1664         igbvf_irq_disable(adapter);
1665
1666         spin_lock_init(&adapter->stats_lock);
1667         spin_lock_init(&adapter->hw.mbx_lock);
1668
1669         set_bit(__IGBVF_DOWN, &adapter->state);
1670         return 0;
1671 }
1672
1673 static void igbvf_initialize_last_counter_stats(struct igbvf_adapter *adapter)
1674 {
1675         struct e1000_hw *hw = &adapter->hw;
1676
1677         adapter->stats.last_gprc = er32(VFGPRC);
1678         adapter->stats.last_gorc = er32(VFGORC);
1679         adapter->stats.last_gptc = er32(VFGPTC);
1680         adapter->stats.last_gotc = er32(VFGOTC);
1681         adapter->stats.last_mprc = er32(VFMPRC);
1682         adapter->stats.last_gotlbc = er32(VFGOTLBC);
1683         adapter->stats.last_gptlbc = er32(VFGPTLBC);
1684         adapter->stats.last_gorlbc = er32(VFGORLBC);
1685         adapter->stats.last_gprlbc = er32(VFGPRLBC);
1686
1687         adapter->stats.base_gprc = er32(VFGPRC);
1688         adapter->stats.base_gorc = er32(VFGORC);
1689         adapter->stats.base_gptc = er32(VFGPTC);
1690         adapter->stats.base_gotc = er32(VFGOTC);
1691         adapter->stats.base_mprc = er32(VFMPRC);
1692         adapter->stats.base_gotlbc = er32(VFGOTLBC);
1693         adapter->stats.base_gptlbc = er32(VFGPTLBC);
1694         adapter->stats.base_gorlbc = er32(VFGORLBC);
1695         adapter->stats.base_gprlbc = er32(VFGPRLBC);
1696 }
1697
1698 /**
1699  * igbvf_open - Called when a network interface is made active
1700  * @netdev: network interface device structure
1701  *
1702  * Returns 0 on success, negative value on failure
1703  *
1704  * The open entry point is called when a network interface is made
1705  * active by the system (IFF_UP).  At this point all resources needed
1706  * for transmit and receive operations are allocated, the interrupt
1707  * handler is registered with the OS, the watchdog timer is started,
1708  * and the stack is notified that the interface is ready.
1709  **/
1710 static int igbvf_open(struct net_device *netdev)
1711 {
1712         struct igbvf_adapter *adapter = netdev_priv(netdev);
1713         struct e1000_hw *hw = &adapter->hw;
1714         int err;
1715
1716         /* disallow open during test */
1717         if (test_bit(__IGBVF_TESTING, &adapter->state))
1718                 return -EBUSY;
1719
1720         /* allocate transmit descriptors */
1721         err = igbvf_setup_tx_resources(adapter, adapter->tx_ring);
1722         if (err)
1723                 goto err_setup_tx;
1724
1725         /* allocate receive descriptors */
1726         err = igbvf_setup_rx_resources(adapter, adapter->rx_ring);
1727         if (err)
1728                 goto err_setup_rx;
1729
1730         /* before we allocate an interrupt, we must be ready to handle it.
1731          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
1732          * as soon as we call pci_request_irq, so we have to setup our
1733          * clean_rx handler before we do so.
1734          */
1735         igbvf_configure(adapter);
1736
1737         err = igbvf_request_irq(adapter);
1738         if (err)
1739                 goto err_req_irq;
1740
1741         /* From here on the code is the same as igbvf_up() */
1742         clear_bit(__IGBVF_DOWN, &adapter->state);
1743
1744         napi_enable(&adapter->rx_ring->napi);
1745
1746         /* clear any pending interrupts */
1747         er32(EICR);
1748
1749         igbvf_irq_enable(adapter);
1750
1751         /* start the watchdog */
1752         hw->mac.get_link_status = 1;
1753         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1754
1755         return 0;
1756
1757 err_req_irq:
1758         igbvf_free_rx_resources(adapter->rx_ring);
1759 err_setup_rx:
1760         igbvf_free_tx_resources(adapter->tx_ring);
1761 err_setup_tx:
1762         igbvf_reset(adapter);
1763
1764         return err;
1765 }
1766
1767 /**
1768  * igbvf_close - Disables a network interface
1769  * @netdev: network interface device structure
1770  *
1771  * Returns 0, this is not allowed to fail
1772  *
1773  * The close entry point is called when an interface is de-activated
1774  * by the OS.  The hardware is still under the drivers control, but
1775  * needs to be disabled.  A global MAC reset is issued to stop the
1776  * hardware, and all transmit and receive resources are freed.
1777  **/
1778 static int igbvf_close(struct net_device *netdev)
1779 {
1780         struct igbvf_adapter *adapter = netdev_priv(netdev);
1781
1782         WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
1783         igbvf_down(adapter);
1784
1785         igbvf_free_irq(adapter);
1786
1787         igbvf_free_tx_resources(adapter->tx_ring);
1788         igbvf_free_rx_resources(adapter->rx_ring);
1789
1790         return 0;
1791 }
1792
1793 /**
1794  * igbvf_set_mac - Change the Ethernet Address of the NIC
1795  * @netdev: network interface device structure
1796  * @p: pointer to an address structure
1797  *
1798  * Returns 0 on success, negative on failure
1799  **/
1800 static int igbvf_set_mac(struct net_device *netdev, void *p)
1801 {
1802         struct igbvf_adapter *adapter = netdev_priv(netdev);
1803         struct e1000_hw *hw = &adapter->hw;
1804         struct sockaddr *addr = p;
1805
1806         if (!is_valid_ether_addr(addr->sa_data))
1807                 return -EADDRNOTAVAIL;
1808
1809         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
1810
1811         spin_lock_bh(&hw->mbx_lock);
1812
1813         hw->mac.ops.rar_set(hw, hw->mac.addr, 0);
1814
1815         spin_unlock_bh(&hw->mbx_lock);
1816
1817         if (!ether_addr_equal(addr->sa_data, hw->mac.addr))
1818                 return -EADDRNOTAVAIL;
1819
1820         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1821
1822         return 0;
1823 }
1824
1825 #define UPDATE_VF_COUNTER(reg, name) \
1826 { \
1827         u32 current_counter = er32(reg); \
1828         if (current_counter < adapter->stats.last_##name) \
1829                 adapter->stats.name += 0x100000000LL; \
1830         adapter->stats.last_##name = current_counter; \
1831         adapter->stats.name &= 0xFFFFFFFF00000000LL; \
1832         adapter->stats.name |= current_counter; \
1833 }
1834
1835 /**
1836  * igbvf_update_stats - Update the board statistics counters
1837  * @adapter: board private structure
1838 **/
1839 void igbvf_update_stats(struct igbvf_adapter *adapter)
1840 {
1841         struct e1000_hw *hw = &adapter->hw;
1842         struct pci_dev *pdev = adapter->pdev;
1843
1844         /* Prevent stats update while adapter is being reset, link is down
1845          * or if the pci connection is down.
1846          */
1847         if (adapter->link_speed == 0)
1848                 return;
1849
1850         if (test_bit(__IGBVF_RESETTING, &adapter->state))
1851                 return;
1852
1853         if (pci_channel_offline(pdev))
1854                 return;
1855
1856         UPDATE_VF_COUNTER(VFGPRC, gprc);
1857         UPDATE_VF_COUNTER(VFGORC, gorc);
1858         UPDATE_VF_COUNTER(VFGPTC, gptc);
1859         UPDATE_VF_COUNTER(VFGOTC, gotc);
1860         UPDATE_VF_COUNTER(VFMPRC, mprc);
1861         UPDATE_VF_COUNTER(VFGOTLBC, gotlbc);
1862         UPDATE_VF_COUNTER(VFGPTLBC, gptlbc);
1863         UPDATE_VF_COUNTER(VFGORLBC, gorlbc);
1864         UPDATE_VF_COUNTER(VFGPRLBC, gprlbc);
1865
1866         /* Fill out the OS statistics structure */
1867         adapter->netdev->stats.multicast = adapter->stats.mprc;
1868 }
1869
1870 static void igbvf_print_link_info(struct igbvf_adapter *adapter)
1871 {
1872         dev_info(&adapter->pdev->dev, "Link is Up %d Mbps %s Duplex\n",
1873                  adapter->link_speed,
1874                  adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half");
1875 }
1876
1877 static bool igbvf_has_link(struct igbvf_adapter *adapter)
1878 {
1879         struct e1000_hw *hw = &adapter->hw;
1880         s32 ret_val = E1000_SUCCESS;
1881         bool link_active;
1882
1883         /* If interface is down, stay link down */
1884         if (test_bit(__IGBVF_DOWN, &adapter->state))
1885                 return false;
1886
1887         spin_lock_bh(&hw->mbx_lock);
1888
1889         ret_val = hw->mac.ops.check_for_link(hw);
1890
1891         spin_unlock_bh(&hw->mbx_lock);
1892
1893         link_active = !hw->mac.get_link_status;
1894
1895         /* if check for link returns error we will need to reset */
1896         if (ret_val && time_after(jiffies, adapter->last_reset + (10 * HZ)))
1897                 schedule_work(&adapter->reset_task);
1898
1899         return link_active;
1900 }
1901
1902 /**
1903  * igbvf_watchdog - Timer Call-back
1904  * @t: timer list pointer containing private struct
1905  **/
1906 static void igbvf_watchdog(struct timer_list *t)
1907 {
1908         struct igbvf_adapter *adapter = from_timer(adapter, t, watchdog_timer);
1909
1910         /* Do the rest outside of interrupt context */
1911         schedule_work(&adapter->watchdog_task);
1912 }
1913
1914 static void igbvf_watchdog_task(struct work_struct *work)
1915 {
1916         struct igbvf_adapter *adapter = container_of(work,
1917                                                      struct igbvf_adapter,
1918                                                      watchdog_task);
1919         struct net_device *netdev = adapter->netdev;
1920         struct e1000_mac_info *mac = &adapter->hw.mac;
1921         struct igbvf_ring *tx_ring = adapter->tx_ring;
1922         struct e1000_hw *hw = &adapter->hw;
1923         u32 link;
1924         int tx_pending = 0;
1925
1926         link = igbvf_has_link(adapter);
1927
1928         if (link) {
1929                 if (!netif_carrier_ok(netdev)) {
1930                         mac->ops.get_link_up_info(&adapter->hw,
1931                                                   &adapter->link_speed,
1932                                                   &adapter->link_duplex);
1933                         igbvf_print_link_info(adapter);
1934
1935                         netif_carrier_on(netdev);
1936                         netif_wake_queue(netdev);
1937                 }
1938         } else {
1939                 if (netif_carrier_ok(netdev)) {
1940                         adapter->link_speed = 0;
1941                         adapter->link_duplex = 0;
1942                         dev_info(&adapter->pdev->dev, "Link is Down\n");
1943                         netif_carrier_off(netdev);
1944                         netif_stop_queue(netdev);
1945                 }
1946         }
1947
1948         if (netif_carrier_ok(netdev)) {
1949                 igbvf_update_stats(adapter);
1950         } else {
1951                 tx_pending = (igbvf_desc_unused(tx_ring) + 1 <
1952                               tx_ring->count);
1953                 if (tx_pending) {
1954                         /* We've lost link, so the controller stops DMA,
1955                          * but we've got queued Tx work that's never going
1956                          * to get done, so reset controller to flush Tx.
1957                          * (Do the reset outside of interrupt context).
1958                          */
1959                         adapter->tx_timeout_count++;
1960                         schedule_work(&adapter->reset_task);
1961                 }
1962         }
1963
1964         /* Cause software interrupt to ensure Rx ring is cleaned */
1965         ew32(EICS, adapter->rx_ring->eims_value);
1966
1967         /* Reset the timer */
1968         if (!test_bit(__IGBVF_DOWN, &adapter->state))
1969                 mod_timer(&adapter->watchdog_timer,
1970                           round_jiffies(jiffies + (2 * HZ)));
1971 }
1972
1973 #define IGBVF_TX_FLAGS_CSUM             0x00000001
1974 #define IGBVF_TX_FLAGS_VLAN             0x00000002
1975 #define IGBVF_TX_FLAGS_TSO              0x00000004
1976 #define IGBVF_TX_FLAGS_IPV4             0x00000008
1977 #define IGBVF_TX_FLAGS_VLAN_MASK        0xffff0000
1978 #define IGBVF_TX_FLAGS_VLAN_SHIFT       16
1979
1980 static void igbvf_tx_ctxtdesc(struct igbvf_ring *tx_ring, u32 vlan_macip_lens,
1981                               u32 type_tucmd, u32 mss_l4len_idx)
1982 {
1983         struct e1000_adv_tx_context_desc *context_desc;
1984         struct igbvf_buffer *buffer_info;
1985         u16 i = tx_ring->next_to_use;
1986
1987         context_desc = IGBVF_TX_CTXTDESC_ADV(*tx_ring, i);
1988         buffer_info = &tx_ring->buffer_info[i];
1989
1990         i++;
1991         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
1992
1993         /* set bits to identify this as an advanced context descriptor */
1994         type_tucmd |= E1000_TXD_CMD_DEXT | E1000_ADVTXD_DTYP_CTXT;
1995
1996         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
1997         context_desc->seqnum_seed       = 0;
1998         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
1999         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
2000
2001         buffer_info->time_stamp = jiffies;
2002         buffer_info->dma = 0;
2003 }
2004
2005 static int igbvf_tso(struct igbvf_ring *tx_ring,
2006                      struct sk_buff *skb, u32 tx_flags, u8 *hdr_len)
2007 {
2008         u32 vlan_macip_lens, type_tucmd, mss_l4len_idx;
2009         union {
2010                 struct iphdr *v4;
2011                 struct ipv6hdr *v6;
2012                 unsigned char *hdr;
2013         } ip;
2014         union {
2015                 struct tcphdr *tcp;
2016                 unsigned char *hdr;
2017         } l4;
2018         u32 paylen, l4_offset;
2019         int err;
2020
2021         if (skb->ip_summed != CHECKSUM_PARTIAL)
2022                 return 0;
2023
2024         if (!skb_is_gso(skb))
2025                 return 0;
2026
2027         err = skb_cow_head(skb, 0);
2028         if (err < 0)
2029                 return err;
2030
2031         ip.hdr = skb_network_header(skb);
2032         l4.hdr = skb_checksum_start(skb);
2033
2034         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2035         type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2036
2037         /* initialize outer IP header fields */
2038         if (ip.v4->version == 4) {
2039                 unsigned char *csum_start = skb_checksum_start(skb);
2040                 unsigned char *trans_start = ip.hdr + (ip.v4->ihl * 4);
2041
2042                 /* IP header will have to cancel out any data that
2043                  * is not a part of the outer IP header
2044                  */
2045                 ip.v4->check = csum_fold(csum_partial(trans_start,
2046                                                       csum_start - trans_start,
2047                                                       0));
2048                 type_tucmd |= E1000_ADVTXD_TUCMD_IPV4;
2049
2050                 ip.v4->tot_len = 0;
2051         } else {
2052                 ip.v6->payload_len = 0;
2053         }
2054
2055         /* determine offset of inner transport header */
2056         l4_offset = l4.hdr - skb->data;
2057
2058         /* compute length of segmentation header */
2059         *hdr_len = (l4.tcp->doff * 4) + l4_offset;
2060
2061         /* remove payload length from inner checksum */
2062         paylen = skb->len - l4_offset;
2063         csum_replace_by_diff(&l4.tcp->check, htonl(paylen));
2064
2065         /* MSS L4LEN IDX */
2066         mss_l4len_idx = (*hdr_len - l4_offset) << E1000_ADVTXD_L4LEN_SHIFT;
2067         mss_l4len_idx |= skb_shinfo(skb)->gso_size << E1000_ADVTXD_MSS_SHIFT;
2068
2069         /* VLAN MACLEN IPLEN */
2070         vlan_macip_lens = l4.hdr - ip.hdr;
2071         vlan_macip_lens |= (ip.hdr - skb->data) << E1000_ADVTXD_MACLEN_SHIFT;
2072         vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2073
2074         igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, mss_l4len_idx);
2075
2076         return 1;
2077 }
2078
2079 static inline bool igbvf_ipv6_csum_is_sctp(struct sk_buff *skb)
2080 {
2081         unsigned int offset = 0;
2082
2083         ipv6_find_hdr(skb, &offset, IPPROTO_SCTP, NULL, NULL);
2084
2085         return offset == skb_checksum_start_offset(skb);
2086 }
2087
2088 static bool igbvf_tx_csum(struct igbvf_ring *tx_ring, struct sk_buff *skb,
2089                           u32 tx_flags, __be16 protocol)
2090 {
2091         u32 vlan_macip_lens = 0;
2092         u32 type_tucmd = 0;
2093
2094         if (skb->ip_summed != CHECKSUM_PARTIAL) {
2095 csum_failed:
2096                 if (!(tx_flags & IGBVF_TX_FLAGS_VLAN))
2097                         return false;
2098                 goto no_csum;
2099         }
2100
2101         switch (skb->csum_offset) {
2102         case offsetof(struct tcphdr, check):
2103                 type_tucmd = E1000_ADVTXD_TUCMD_L4T_TCP;
2104                 fallthrough;
2105         case offsetof(struct udphdr, check):
2106                 break;
2107         case offsetof(struct sctphdr, checksum):
2108                 /* validate that this is actually an SCTP request */
2109                 if (((protocol == htons(ETH_P_IP)) &&
2110                      (ip_hdr(skb)->protocol == IPPROTO_SCTP)) ||
2111                     ((protocol == htons(ETH_P_IPV6)) &&
2112                      igbvf_ipv6_csum_is_sctp(skb))) {
2113                         type_tucmd = E1000_ADVTXD_TUCMD_L4T_SCTP;
2114                         break;
2115                 }
2116                 fallthrough;
2117         default:
2118                 skb_checksum_help(skb);
2119                 goto csum_failed;
2120         }
2121
2122         vlan_macip_lens = skb_checksum_start_offset(skb) -
2123                           skb_network_offset(skb);
2124 no_csum:
2125         vlan_macip_lens |= skb_network_offset(skb) << E1000_ADVTXD_MACLEN_SHIFT;
2126         vlan_macip_lens |= tx_flags & IGBVF_TX_FLAGS_VLAN_MASK;
2127
2128         igbvf_tx_ctxtdesc(tx_ring, vlan_macip_lens, type_tucmd, 0);
2129         return true;
2130 }
2131
2132 static int igbvf_maybe_stop_tx(struct net_device *netdev, int size)
2133 {
2134         struct igbvf_adapter *adapter = netdev_priv(netdev);
2135
2136         /* there is enough descriptors then we don't need to worry  */
2137         if (igbvf_desc_unused(adapter->tx_ring) >= size)
2138                 return 0;
2139
2140         netif_stop_queue(netdev);
2141
2142         /* Herbert's original patch had:
2143          *  smp_mb__after_netif_stop_queue();
2144          * but since that doesn't exist yet, just open code it.
2145          */
2146         smp_mb();
2147
2148         /* We need to check again just in case room has been made available */
2149         if (igbvf_desc_unused(adapter->tx_ring) < size)
2150                 return -EBUSY;
2151
2152         netif_wake_queue(netdev);
2153
2154         ++adapter->restart_queue;
2155         return 0;
2156 }
2157
2158 #define IGBVF_MAX_TXD_PWR       16
2159 #define IGBVF_MAX_DATA_PER_TXD  (1u << IGBVF_MAX_TXD_PWR)
2160
2161 static inline int igbvf_tx_map_adv(struct igbvf_adapter *adapter,
2162                                    struct igbvf_ring *tx_ring,
2163                                    struct sk_buff *skb)
2164 {
2165         struct igbvf_buffer *buffer_info;
2166         struct pci_dev *pdev = adapter->pdev;
2167         unsigned int len = skb_headlen(skb);
2168         unsigned int count = 0, i;
2169         unsigned int f;
2170
2171         i = tx_ring->next_to_use;
2172
2173         buffer_info = &tx_ring->buffer_info[i];
2174         BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2175         buffer_info->length = len;
2176         /* set time_stamp *before* dma to help avoid a possible race */
2177         buffer_info->time_stamp = jiffies;
2178         buffer_info->mapped_as_page = false;
2179         buffer_info->dma = dma_map_single(&pdev->dev, skb->data, len,
2180                                           DMA_TO_DEVICE);
2181         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2182                 goto dma_error;
2183
2184         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++) {
2185                 const skb_frag_t *frag;
2186
2187                 count++;
2188                 i++;
2189                 if (i == tx_ring->count)
2190                         i = 0;
2191
2192                 frag = &skb_shinfo(skb)->frags[f];
2193                 len = skb_frag_size(frag);
2194
2195                 buffer_info = &tx_ring->buffer_info[i];
2196                 BUG_ON(len >= IGBVF_MAX_DATA_PER_TXD);
2197                 buffer_info->length = len;
2198                 buffer_info->time_stamp = jiffies;
2199                 buffer_info->mapped_as_page = true;
2200                 buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag, 0, len,
2201                                                     DMA_TO_DEVICE);
2202                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
2203                         goto dma_error;
2204         }
2205
2206         tx_ring->buffer_info[i].skb = skb;
2207
2208         return ++count;
2209
2210 dma_error:
2211         dev_err(&pdev->dev, "TX DMA map failed\n");
2212
2213         /* clear timestamp and dma mappings for failed buffer_info mapping */
2214         buffer_info->dma = 0;
2215         buffer_info->time_stamp = 0;
2216         buffer_info->length = 0;
2217         buffer_info->mapped_as_page = false;
2218         if (count)
2219                 count--;
2220
2221         /* clear timestamp and dma mappings for remaining portion of packet */
2222         while (count--) {
2223                 if (i == 0)
2224                         i += tx_ring->count;
2225                 i--;
2226                 buffer_info = &tx_ring->buffer_info[i];
2227                 igbvf_put_txbuf(adapter, buffer_info);
2228         }
2229
2230         return 0;
2231 }
2232
2233 static inline void igbvf_tx_queue_adv(struct igbvf_adapter *adapter,
2234                                       struct igbvf_ring *tx_ring,
2235                                       int tx_flags, int count,
2236                                       unsigned int first, u32 paylen,
2237                                       u8 hdr_len)
2238 {
2239         union e1000_adv_tx_desc *tx_desc = NULL;
2240         struct igbvf_buffer *buffer_info;
2241         u32 olinfo_status = 0, cmd_type_len;
2242         unsigned int i;
2243
2244         cmd_type_len = (E1000_ADVTXD_DTYP_DATA | E1000_ADVTXD_DCMD_IFCS |
2245                         E1000_ADVTXD_DCMD_DEXT);
2246
2247         if (tx_flags & IGBVF_TX_FLAGS_VLAN)
2248                 cmd_type_len |= E1000_ADVTXD_DCMD_VLE;
2249
2250         if (tx_flags & IGBVF_TX_FLAGS_TSO) {
2251                 cmd_type_len |= E1000_ADVTXD_DCMD_TSE;
2252
2253                 /* insert tcp checksum */
2254                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2255
2256                 /* insert ip checksum */
2257                 if (tx_flags & IGBVF_TX_FLAGS_IPV4)
2258                         olinfo_status |= E1000_TXD_POPTS_IXSM << 8;
2259
2260         } else if (tx_flags & IGBVF_TX_FLAGS_CSUM) {
2261                 olinfo_status |= E1000_TXD_POPTS_TXSM << 8;
2262         }
2263
2264         olinfo_status |= ((paylen - hdr_len) << E1000_ADVTXD_PAYLEN_SHIFT);
2265
2266         i = tx_ring->next_to_use;
2267         while (count--) {
2268                 buffer_info = &tx_ring->buffer_info[i];
2269                 tx_desc = IGBVF_TX_DESC_ADV(*tx_ring, i);
2270                 tx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
2271                 tx_desc->read.cmd_type_len =
2272                          cpu_to_le32(cmd_type_len | buffer_info->length);
2273                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
2274                 i++;
2275                 if (i == tx_ring->count)
2276                         i = 0;
2277         }
2278
2279         tx_desc->read.cmd_type_len |= cpu_to_le32(adapter->txd_cmd);
2280         /* Force memory writes to complete before letting h/w
2281          * know there are new descriptors to fetch.  (Only
2282          * applicable for weak-ordered memory model archs,
2283          * such as IA-64).
2284          */
2285         wmb();
2286
2287         tx_ring->buffer_info[first].next_to_watch = tx_desc;
2288         tx_ring->next_to_use = i;
2289         writel(i, adapter->hw.hw_addr + tx_ring->tail);
2290 }
2291
2292 static netdev_tx_t igbvf_xmit_frame_ring_adv(struct sk_buff *skb,
2293                                              struct net_device *netdev,
2294                                              struct igbvf_ring *tx_ring)
2295 {
2296         struct igbvf_adapter *adapter = netdev_priv(netdev);
2297         unsigned int first, tx_flags = 0;
2298         u8 hdr_len = 0;
2299         int count = 0;
2300         int tso = 0;
2301         __be16 protocol = vlan_get_protocol(skb);
2302
2303         if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2304                 dev_kfree_skb_any(skb);
2305                 return NETDEV_TX_OK;
2306         }
2307
2308         if (skb->len <= 0) {
2309                 dev_kfree_skb_any(skb);
2310                 return NETDEV_TX_OK;
2311         }
2312
2313         /* need: count + 4 desc gap to keep tail from touching
2314          *       + 2 desc gap to keep tail from touching head,
2315          *       + 1 desc for skb->data,
2316          *       + 1 desc for context descriptor,
2317          * head, otherwise try next time
2318          */
2319         if (igbvf_maybe_stop_tx(netdev, skb_shinfo(skb)->nr_frags + 4)) {
2320                 /* this is a hard error */
2321                 return NETDEV_TX_BUSY;
2322         }
2323
2324         if (skb_vlan_tag_present(skb)) {
2325                 tx_flags |= IGBVF_TX_FLAGS_VLAN;
2326                 tx_flags |= (skb_vlan_tag_get(skb) <<
2327                              IGBVF_TX_FLAGS_VLAN_SHIFT);
2328         }
2329
2330         if (protocol == htons(ETH_P_IP))
2331                 tx_flags |= IGBVF_TX_FLAGS_IPV4;
2332
2333         first = tx_ring->next_to_use;
2334
2335         tso = igbvf_tso(tx_ring, skb, tx_flags, &hdr_len);
2336         if (unlikely(tso < 0)) {
2337                 dev_kfree_skb_any(skb);
2338                 return NETDEV_TX_OK;
2339         }
2340
2341         if (tso)
2342                 tx_flags |= IGBVF_TX_FLAGS_TSO;
2343         else if (igbvf_tx_csum(tx_ring, skb, tx_flags, protocol) &&
2344                  (skb->ip_summed == CHECKSUM_PARTIAL))
2345                 tx_flags |= IGBVF_TX_FLAGS_CSUM;
2346
2347         /* count reflects descriptors mapped, if 0 then mapping error
2348          * has occurred and we need to rewind the descriptor queue
2349          */
2350         count = igbvf_tx_map_adv(adapter, tx_ring, skb);
2351
2352         if (count) {
2353                 igbvf_tx_queue_adv(adapter, tx_ring, tx_flags, count,
2354                                    first, skb->len, hdr_len);
2355                 /* Make sure there is space in the ring for the next send. */
2356                 igbvf_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 4);
2357         } else {
2358                 dev_kfree_skb_any(skb);
2359                 tx_ring->buffer_info[first].time_stamp = 0;
2360                 tx_ring->next_to_use = first;
2361         }
2362
2363         return NETDEV_TX_OK;
2364 }
2365
2366 static netdev_tx_t igbvf_xmit_frame(struct sk_buff *skb,
2367                                     struct net_device *netdev)
2368 {
2369         struct igbvf_adapter *adapter = netdev_priv(netdev);
2370         struct igbvf_ring *tx_ring;
2371
2372         if (test_bit(__IGBVF_DOWN, &adapter->state)) {
2373                 dev_kfree_skb_any(skb);
2374                 return NETDEV_TX_OK;
2375         }
2376
2377         tx_ring = &adapter->tx_ring[0];
2378
2379         return igbvf_xmit_frame_ring_adv(skb, netdev, tx_ring);
2380 }
2381
2382 /**
2383  * igbvf_tx_timeout - Respond to a Tx Hang
2384  * @netdev: network interface device structure
2385  * @txqueue: queue timing out (unused)
2386  **/
2387 static void igbvf_tx_timeout(struct net_device *netdev, unsigned int __always_unused txqueue)
2388 {
2389         struct igbvf_adapter *adapter = netdev_priv(netdev);
2390
2391         /* Do the reset outside of interrupt context */
2392         adapter->tx_timeout_count++;
2393         schedule_work(&adapter->reset_task);
2394 }
2395
2396 static void igbvf_reset_task(struct work_struct *work)
2397 {
2398         struct igbvf_adapter *adapter;
2399
2400         adapter = container_of(work, struct igbvf_adapter, reset_task);
2401
2402         igbvf_reinit_locked(adapter);
2403 }
2404
2405 /**
2406  * igbvf_change_mtu - Change the Maximum Transfer Unit
2407  * @netdev: network interface device structure
2408  * @new_mtu: new value for maximum frame size
2409  *
2410  * Returns 0 on success, negative on failure
2411  **/
2412 static int igbvf_change_mtu(struct net_device *netdev, int new_mtu)
2413 {
2414         struct igbvf_adapter *adapter = netdev_priv(netdev);
2415         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2416
2417         while (test_and_set_bit(__IGBVF_RESETTING, &adapter->state))
2418                 usleep_range(1000, 2000);
2419         /* igbvf_down has a dependency on max_frame_size */
2420         adapter->max_frame_size = max_frame;
2421         if (netif_running(netdev))
2422                 igbvf_down(adapter);
2423
2424         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
2425          * means we reserve 2 more, this pushes us to allocate from the next
2426          * larger slab size.
2427          * i.e. RXBUFFER_2048 --> size-4096 slab
2428          * However with the new *_jumbo_rx* routines, jumbo receives will use
2429          * fragmented skbs
2430          */
2431
2432         if (max_frame <= 1024)
2433                 adapter->rx_buffer_len = 1024;
2434         else if (max_frame <= 2048)
2435                 adapter->rx_buffer_len = 2048;
2436         else
2437 #if (PAGE_SIZE / 2) > 16384
2438                 adapter->rx_buffer_len = 16384;
2439 #else
2440                 adapter->rx_buffer_len = PAGE_SIZE / 2;
2441 #endif
2442
2443         /* adjust allocation if LPE protects us, and we aren't using SBP */
2444         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
2445             (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
2446                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN +
2447                                          ETH_FCS_LEN;
2448
2449         netdev_dbg(netdev, "changing MTU from %d to %d\n",
2450                    netdev->mtu, new_mtu);
2451         netdev->mtu = new_mtu;
2452
2453         if (netif_running(netdev))
2454                 igbvf_up(adapter);
2455         else
2456                 igbvf_reset(adapter);
2457
2458         clear_bit(__IGBVF_RESETTING, &adapter->state);
2459
2460         return 0;
2461 }
2462
2463 static int igbvf_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
2464 {
2465         switch (cmd) {
2466         default:
2467                 return -EOPNOTSUPP;
2468         }
2469 }
2470
2471 static int igbvf_suspend(struct device *dev_d)
2472 {
2473         struct net_device *netdev = dev_get_drvdata(dev_d);
2474         struct igbvf_adapter *adapter = netdev_priv(netdev);
2475
2476         netif_device_detach(netdev);
2477
2478         if (netif_running(netdev)) {
2479                 WARN_ON(test_bit(__IGBVF_RESETTING, &adapter->state));
2480                 igbvf_down(adapter);
2481                 igbvf_free_irq(adapter);
2482         }
2483
2484         return 0;
2485 }
2486
2487 static int __maybe_unused igbvf_resume(struct device *dev_d)
2488 {
2489         struct pci_dev *pdev = to_pci_dev(dev_d);
2490         struct net_device *netdev = pci_get_drvdata(pdev);
2491         struct igbvf_adapter *adapter = netdev_priv(netdev);
2492         u32 err;
2493
2494         pci_set_master(pdev);
2495
2496         if (netif_running(netdev)) {
2497                 err = igbvf_request_irq(adapter);
2498                 if (err)
2499                         return err;
2500         }
2501
2502         igbvf_reset(adapter);
2503
2504         if (netif_running(netdev))
2505                 igbvf_up(adapter);
2506
2507         netif_device_attach(netdev);
2508
2509         return 0;
2510 }
2511
2512 static void igbvf_shutdown(struct pci_dev *pdev)
2513 {
2514         igbvf_suspend(&pdev->dev);
2515 }
2516
2517 #ifdef CONFIG_NET_POLL_CONTROLLER
2518 /* Polling 'interrupt' - used by things like netconsole to send skbs
2519  * without having to re-enable interrupts. It's not called while
2520  * the interrupt routine is executing.
2521  */
2522 static void igbvf_netpoll(struct net_device *netdev)
2523 {
2524         struct igbvf_adapter *adapter = netdev_priv(netdev);
2525
2526         disable_irq(adapter->pdev->irq);
2527
2528         igbvf_clean_tx_irq(adapter->tx_ring);
2529
2530         enable_irq(adapter->pdev->irq);
2531 }
2532 #endif
2533
2534 /**
2535  * igbvf_io_error_detected - called when PCI error is detected
2536  * @pdev: Pointer to PCI device
2537  * @state: The current pci connection state
2538  *
2539  * This function is called after a PCI bus error affecting
2540  * this device has been detected.
2541  */
2542 static pci_ers_result_t igbvf_io_error_detected(struct pci_dev *pdev,
2543                                                 pci_channel_state_t state)
2544 {
2545         struct net_device *netdev = pci_get_drvdata(pdev);
2546         struct igbvf_adapter *adapter = netdev_priv(netdev);
2547
2548         netif_device_detach(netdev);
2549
2550         if (state == pci_channel_io_perm_failure)
2551                 return PCI_ERS_RESULT_DISCONNECT;
2552
2553         if (netif_running(netdev))
2554                 igbvf_down(adapter);
2555         pci_disable_device(pdev);
2556
2557         /* Request a slot slot reset. */
2558         return PCI_ERS_RESULT_NEED_RESET;
2559 }
2560
2561 /**
2562  * igbvf_io_slot_reset - called after the pci bus has been reset.
2563  * @pdev: Pointer to PCI device
2564  *
2565  * Restart the card from scratch, as if from a cold-boot. Implementation
2566  * resembles the first-half of the igbvf_resume routine.
2567  */
2568 static pci_ers_result_t igbvf_io_slot_reset(struct pci_dev *pdev)
2569 {
2570         struct net_device *netdev = pci_get_drvdata(pdev);
2571         struct igbvf_adapter *adapter = netdev_priv(netdev);
2572
2573         if (pci_enable_device_mem(pdev)) {
2574                 dev_err(&pdev->dev,
2575                         "Cannot re-enable PCI device after reset.\n");
2576                 return PCI_ERS_RESULT_DISCONNECT;
2577         }
2578         pci_set_master(pdev);
2579
2580         igbvf_reset(adapter);
2581
2582         return PCI_ERS_RESULT_RECOVERED;
2583 }
2584
2585 /**
2586  * igbvf_io_resume - called when traffic can start flowing again.
2587  * @pdev: Pointer to PCI device
2588  *
2589  * This callback is called when the error recovery driver tells us that
2590  * its OK to resume normal operation. Implementation resembles the
2591  * second-half of the igbvf_resume routine.
2592  */
2593 static void igbvf_io_resume(struct pci_dev *pdev)
2594 {
2595         struct net_device *netdev = pci_get_drvdata(pdev);
2596         struct igbvf_adapter *adapter = netdev_priv(netdev);
2597
2598         if (netif_running(netdev)) {
2599                 if (igbvf_up(adapter)) {
2600                         dev_err(&pdev->dev,
2601                                 "can't bring device back up after reset\n");
2602                         return;
2603                 }
2604         }
2605
2606         netif_device_attach(netdev);
2607 }
2608
2609 static void igbvf_print_device_info(struct igbvf_adapter *adapter)
2610 {
2611         struct e1000_hw *hw = &adapter->hw;
2612         struct net_device *netdev = adapter->netdev;
2613         struct pci_dev *pdev = adapter->pdev;
2614
2615         if (hw->mac.type == e1000_vfadapt_i350)
2616                 dev_info(&pdev->dev, "Intel(R) I350 Virtual Function\n");
2617         else
2618                 dev_info(&pdev->dev, "Intel(R) 82576 Virtual Function\n");
2619         dev_info(&pdev->dev, "Address: %pM\n", netdev->dev_addr);
2620 }
2621
2622 static int igbvf_set_features(struct net_device *netdev,
2623                               netdev_features_t features)
2624 {
2625         struct igbvf_adapter *adapter = netdev_priv(netdev);
2626
2627         if (features & NETIF_F_RXCSUM)
2628                 adapter->flags &= ~IGBVF_FLAG_RX_CSUM_DISABLED;
2629         else
2630                 adapter->flags |= IGBVF_FLAG_RX_CSUM_DISABLED;
2631
2632         return 0;
2633 }
2634
2635 #define IGBVF_MAX_MAC_HDR_LEN           127
2636 #define IGBVF_MAX_NETWORK_HDR_LEN       511
2637
2638 static netdev_features_t
2639 igbvf_features_check(struct sk_buff *skb, struct net_device *dev,
2640                      netdev_features_t features)
2641 {
2642         unsigned int network_hdr_len, mac_hdr_len;
2643
2644         /* Make certain the headers can be described by a context descriptor */
2645         mac_hdr_len = skb_network_header(skb) - skb->data;
2646         if (unlikely(mac_hdr_len > IGBVF_MAX_MAC_HDR_LEN))
2647                 return features & ~(NETIF_F_HW_CSUM |
2648                                     NETIF_F_SCTP_CRC |
2649                                     NETIF_F_HW_VLAN_CTAG_TX |
2650                                     NETIF_F_TSO |
2651                                     NETIF_F_TSO6);
2652
2653         network_hdr_len = skb_checksum_start(skb) - skb_network_header(skb);
2654         if (unlikely(network_hdr_len >  IGBVF_MAX_NETWORK_HDR_LEN))
2655                 return features & ~(NETIF_F_HW_CSUM |
2656                                     NETIF_F_SCTP_CRC |
2657                                     NETIF_F_TSO |
2658                                     NETIF_F_TSO6);
2659
2660         /* We can only support IPV4 TSO in tunnels if we can mangle the
2661          * inner IP ID field, so strip TSO if MANGLEID is not supported.
2662          */
2663         if (skb->encapsulation && !(features & NETIF_F_TSO_MANGLEID))
2664                 features &= ~NETIF_F_TSO;
2665
2666         return features;
2667 }
2668
2669 static const struct net_device_ops igbvf_netdev_ops = {
2670         .ndo_open               = igbvf_open,
2671         .ndo_stop               = igbvf_close,
2672         .ndo_start_xmit         = igbvf_xmit_frame,
2673         .ndo_set_rx_mode        = igbvf_set_rx_mode,
2674         .ndo_set_mac_address    = igbvf_set_mac,
2675         .ndo_change_mtu         = igbvf_change_mtu,
2676         .ndo_do_ioctl           = igbvf_ioctl,
2677         .ndo_tx_timeout         = igbvf_tx_timeout,
2678         .ndo_vlan_rx_add_vid    = igbvf_vlan_rx_add_vid,
2679         .ndo_vlan_rx_kill_vid   = igbvf_vlan_rx_kill_vid,
2680 #ifdef CONFIG_NET_POLL_CONTROLLER
2681         .ndo_poll_controller    = igbvf_netpoll,
2682 #endif
2683         .ndo_set_features       = igbvf_set_features,
2684         .ndo_features_check     = igbvf_features_check,
2685 };
2686
2687 /**
2688  * igbvf_probe - Device Initialization Routine
2689  * @pdev: PCI device information struct
2690  * @ent: entry in igbvf_pci_tbl
2691  *
2692  * Returns 0 on success, negative on failure
2693  *
2694  * igbvf_probe initializes an adapter identified by a pci_dev structure.
2695  * The OS initialization, configuring of the adapter private structure,
2696  * and a hardware reset occur.
2697  **/
2698 static int igbvf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2699 {
2700         struct net_device *netdev;
2701         struct igbvf_adapter *adapter;
2702         struct e1000_hw *hw;
2703         const struct igbvf_info *ei = igbvf_info_tbl[ent->driver_data];
2704
2705         static int cards_found;
2706         int err, pci_using_dac;
2707
2708         err = pci_enable_device_mem(pdev);
2709         if (err)
2710                 return err;
2711
2712         pci_using_dac = 0;
2713         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2714         if (!err) {
2715                 pci_using_dac = 1;
2716         } else {
2717                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2718                 if (err) {
2719                         dev_err(&pdev->dev,
2720                                 "No usable DMA configuration, aborting\n");
2721                         goto err_dma;
2722                 }
2723         }
2724
2725         err = pci_request_regions(pdev, igbvf_driver_name);
2726         if (err)
2727                 goto err_pci_reg;
2728
2729         pci_set_master(pdev);
2730
2731         err = -ENOMEM;
2732         netdev = alloc_etherdev(sizeof(struct igbvf_adapter));
2733         if (!netdev)
2734                 goto err_alloc_etherdev;
2735
2736         SET_NETDEV_DEV(netdev, &pdev->dev);
2737
2738         pci_set_drvdata(pdev, netdev);
2739         adapter = netdev_priv(netdev);
2740         hw = &adapter->hw;
2741         adapter->netdev = netdev;
2742         adapter->pdev = pdev;
2743         adapter->ei = ei;
2744         adapter->pba = ei->pba;
2745         adapter->flags = ei->flags;
2746         adapter->hw.back = adapter;
2747         adapter->hw.mac.type = ei->mac;
2748         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2749
2750         /* PCI config space info */
2751
2752         hw->vendor_id = pdev->vendor;
2753         hw->device_id = pdev->device;
2754         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2755         hw->subsystem_device_id = pdev->subsystem_device;
2756         hw->revision_id = pdev->revision;
2757
2758         err = -EIO;
2759         adapter->hw.hw_addr = ioremap(pci_resource_start(pdev, 0),
2760                                       pci_resource_len(pdev, 0));
2761
2762         if (!adapter->hw.hw_addr)
2763                 goto err_ioremap;
2764
2765         if (ei->get_variants) {
2766                 err = ei->get_variants(adapter);
2767                 if (err)
2768                         goto err_get_variants;
2769         }
2770
2771         /* setup adapter struct */
2772         err = igbvf_sw_init(adapter);
2773         if (err)
2774                 goto err_sw_init;
2775
2776         /* construct the net_device struct */
2777         netdev->netdev_ops = &igbvf_netdev_ops;
2778
2779         igbvf_set_ethtool_ops(netdev);
2780         netdev->watchdog_timeo = 5 * HZ;
2781         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
2782
2783         adapter->bd_number = cards_found++;
2784
2785         netdev->hw_features = NETIF_F_SG |
2786                               NETIF_F_TSO |
2787                               NETIF_F_TSO6 |
2788                               NETIF_F_RXCSUM |
2789                               NETIF_F_HW_CSUM |
2790                               NETIF_F_SCTP_CRC;
2791
2792 #define IGBVF_GSO_PARTIAL_FEATURES (NETIF_F_GSO_GRE | \
2793                                     NETIF_F_GSO_GRE_CSUM | \
2794                                     NETIF_F_GSO_IPXIP4 | \
2795                                     NETIF_F_GSO_IPXIP6 | \
2796                                     NETIF_F_GSO_UDP_TUNNEL | \
2797                                     NETIF_F_GSO_UDP_TUNNEL_CSUM)
2798
2799         netdev->gso_partial_features = IGBVF_GSO_PARTIAL_FEATURES;
2800         netdev->hw_features |= NETIF_F_GSO_PARTIAL |
2801                                IGBVF_GSO_PARTIAL_FEATURES;
2802
2803         netdev->features = netdev->hw_features;
2804
2805         if (pci_using_dac)
2806                 netdev->features |= NETIF_F_HIGHDMA;
2807
2808         netdev->vlan_features |= netdev->features | NETIF_F_TSO_MANGLEID;
2809         netdev->mpls_features |= NETIF_F_HW_CSUM;
2810         netdev->hw_enc_features |= netdev->vlan_features;
2811
2812         /* set this bit last since it cannot be part of vlan_features */
2813         netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER |
2814                             NETIF_F_HW_VLAN_CTAG_RX |
2815                             NETIF_F_HW_VLAN_CTAG_TX;
2816
2817         /* MTU range: 68 - 9216 */
2818         netdev->min_mtu = ETH_MIN_MTU;
2819         netdev->max_mtu = MAX_STD_JUMBO_FRAME_SIZE;
2820
2821         spin_lock_bh(&hw->mbx_lock);
2822
2823         /*reset the controller to put the device in a known good state */
2824         err = hw->mac.ops.reset_hw(hw);
2825         if (err) {
2826                 dev_info(&pdev->dev,
2827                          "PF still in reset state. Is the PF interface up?\n");
2828         } else {
2829                 err = hw->mac.ops.read_mac_addr(hw);
2830                 if (err)
2831                         dev_info(&pdev->dev, "Error reading MAC address.\n");
2832                 else if (is_zero_ether_addr(adapter->hw.mac.addr))
2833                         dev_info(&pdev->dev,
2834                                  "MAC address not assigned by administrator.\n");
2835                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
2836                        netdev->addr_len);
2837         }
2838
2839         spin_unlock_bh(&hw->mbx_lock);
2840
2841         if (!is_valid_ether_addr(netdev->dev_addr)) {
2842                 dev_info(&pdev->dev, "Assigning random MAC address.\n");
2843                 eth_hw_addr_random(netdev);
2844                 memcpy(adapter->hw.mac.addr, netdev->dev_addr,
2845                        netdev->addr_len);
2846         }
2847
2848         timer_setup(&adapter->watchdog_timer, igbvf_watchdog, 0);
2849
2850         INIT_WORK(&adapter->reset_task, igbvf_reset_task);
2851         INIT_WORK(&adapter->watchdog_task, igbvf_watchdog_task);
2852
2853         /* ring size defaults */
2854         adapter->rx_ring->count = 1024;
2855         adapter->tx_ring->count = 1024;
2856
2857         /* reset the hardware with the new settings */
2858         igbvf_reset(adapter);
2859
2860         /* set hardware-specific flags */
2861         if (adapter->hw.mac.type == e1000_vfadapt_i350)
2862                 adapter->flags |= IGBVF_FLAG_RX_LB_VLAN_BSWAP;
2863
2864         strcpy(netdev->name, "eth%d");
2865         err = register_netdev(netdev);
2866         if (err)
2867                 goto err_hw_init;
2868
2869         /* tell the stack to leave us alone until igbvf_open() is called */
2870         netif_carrier_off(netdev);
2871         netif_stop_queue(netdev);
2872
2873         igbvf_print_device_info(adapter);
2874
2875         igbvf_initialize_last_counter_stats(adapter);
2876
2877         return 0;
2878
2879 err_hw_init:
2880         netif_napi_del(&adapter->rx_ring->napi);
2881         kfree(adapter->tx_ring);
2882         kfree(adapter->rx_ring);
2883 err_sw_init:
2884         igbvf_reset_interrupt_capability(adapter);
2885 err_get_variants:
2886         iounmap(adapter->hw.hw_addr);
2887 err_ioremap:
2888         free_netdev(netdev);
2889 err_alloc_etherdev:
2890         pci_release_regions(pdev);
2891 err_pci_reg:
2892 err_dma:
2893         pci_disable_device(pdev);
2894         return err;
2895 }
2896
2897 /**
2898  * igbvf_remove - Device Removal Routine
2899  * @pdev: PCI device information struct
2900  *
2901  * igbvf_remove is called by the PCI subsystem to alert the driver
2902  * that it should release a PCI device.  The could be caused by a
2903  * Hot-Plug event, or because the driver is going to be removed from
2904  * memory.
2905  **/
2906 static void igbvf_remove(struct pci_dev *pdev)
2907 {
2908         struct net_device *netdev = pci_get_drvdata(pdev);
2909         struct igbvf_adapter *adapter = netdev_priv(netdev);
2910         struct e1000_hw *hw = &adapter->hw;
2911
2912         /* The watchdog timer may be rescheduled, so explicitly
2913          * disable it from being rescheduled.
2914          */
2915         set_bit(__IGBVF_DOWN, &adapter->state);
2916         del_timer_sync(&adapter->watchdog_timer);
2917
2918         cancel_work_sync(&adapter->reset_task);
2919         cancel_work_sync(&adapter->watchdog_task);
2920
2921         unregister_netdev(netdev);
2922
2923         igbvf_reset_interrupt_capability(adapter);
2924
2925         /* it is important to delete the NAPI struct prior to freeing the
2926          * Rx ring so that you do not end up with null pointer refs
2927          */
2928         netif_napi_del(&adapter->rx_ring->napi);
2929         kfree(adapter->tx_ring);
2930         kfree(adapter->rx_ring);
2931
2932         iounmap(hw->hw_addr);
2933         if (hw->flash_address)
2934                 iounmap(hw->flash_address);
2935         pci_release_regions(pdev);
2936
2937         free_netdev(netdev);
2938
2939         pci_disable_device(pdev);
2940 }
2941
2942 /* PCI Error Recovery (ERS) */
2943 static const struct pci_error_handlers igbvf_err_handler = {
2944         .error_detected = igbvf_io_error_detected,
2945         .slot_reset = igbvf_io_slot_reset,
2946         .resume = igbvf_io_resume,
2947 };
2948
2949 static const struct pci_device_id igbvf_pci_tbl[] = {
2950         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82576_VF), board_vf },
2951         { PCI_VDEVICE(INTEL, E1000_DEV_ID_I350_VF), board_i350_vf },
2952         { } /* terminate list */
2953 };
2954 MODULE_DEVICE_TABLE(pci, igbvf_pci_tbl);
2955
2956 static SIMPLE_DEV_PM_OPS(igbvf_pm_ops, igbvf_suspend, igbvf_resume);
2957
2958 /* PCI Device API Driver */
2959 static struct pci_driver igbvf_driver = {
2960         .name           = igbvf_driver_name,
2961         .id_table       = igbvf_pci_tbl,
2962         .probe          = igbvf_probe,
2963         .remove         = igbvf_remove,
2964         .driver.pm      = &igbvf_pm_ops,
2965         .shutdown       = igbvf_shutdown,
2966         .err_handler    = &igbvf_err_handler
2967 };
2968
2969 /**
2970  * igbvf_init_module - Driver Registration Routine
2971  *
2972  * igbvf_init_module is the first routine called when the driver is
2973  * loaded. All it does is register with the PCI subsystem.
2974  **/
2975 static int __init igbvf_init_module(void)
2976 {
2977         int ret;
2978
2979         pr_info("%s\n", igbvf_driver_string);
2980         pr_info("%s\n", igbvf_copyright);
2981
2982         ret = pci_register_driver(&igbvf_driver);
2983
2984         return ret;
2985 }
2986 module_init(igbvf_init_module);
2987
2988 /**
2989  * igbvf_exit_module - Driver Exit Cleanup Routine
2990  *
2991  * igbvf_exit_module is called just before the driver is removed
2992  * from memory.
2993  **/
2994 static void __exit igbvf_exit_module(void)
2995 {
2996         pci_unregister_driver(&igbvf_driver);
2997 }
2998 module_exit(igbvf_exit_module);
2999
3000 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
3001 MODULE_DESCRIPTION("Intel(R) Gigabit Virtual Function Network Driver");
3002 MODULE_LICENSE("GPL v2");
3003
3004 /* netdev.c */