drivers/net/e1000e/netdev.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2009 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include <linux/module.h>
  30 #include <linux/types.h>
  31 #include <linux/init.h>
  32 #include <linux/pci.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/pagemap.h>
  35 #include <linux/delay.h>
  36 #include <linux/netdevice.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #include <linux/slab.h>
  40 #include <net/checksum.h>
  41 #include <net/ip6_checksum.h>
  42 #include <linux/mii.h>
  43 #include <linux/ethtool.h>
  44 #include <linux/if_vlan.h>
  45 #include <linux/cpu.h>
  46 #include <linux/smp.h>
  47 #include <linux/pm_qos_params.h>
  48 #include <linux/aer.h>
  49
  50 #include "e1000.h"
  51
  52 #define DRV_VERSION "1.0.2-k2"
  53 char e1000e_driver_name[] = "e1000e";
  54 const char e1000e_driver_version[] = DRV_VERSION;
  55
  56 static const struct e1000_info *e1000_info_tbl[] = {
  57         [board_82571]           = &e1000_82571_info,
  58         [board_82572]           = &e1000_82572_info,
  59         [board_82573]           = &e1000_82573_info,
  60         [board_82574]           = &e1000_82574_info,
  61         [board_82583]           = &e1000_82583_info,
  62         [board_80003es2lan]     = &e1000_es2_info,
  63         [board_ich8lan]         = &e1000_ich8_info,
  64         [board_ich9lan]         = &e1000_ich9_info,
  65         [board_ich10lan]        = &e1000_ich10_info,
  66         [board_pchlan]          = &e1000_pch_info,
  67 };
  68
  69 /**
  70  * e1000_desc_unused - calculate if we have unused descriptors
  71  **/
  72 static int e1000_desc_unused(struct e1000_ring *ring)
  73 {
  74         if (ring->next_to_clean > ring->next_to_use)
  75                 return ring->next_to_clean - ring->next_to_use - 1;
  76
  77         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  78 }
  79
  80 /**
  81  * e1000_receive_skb - helper function to handle Rx indications
  82  * @adapter: board private structure
  83  * @status: descriptor status field as written by hardware
  84  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  85  * @skb: pointer to sk_buff to be indicated to stack
  86  **/
  87 static void e1000_receive_skb(struct e1000_adapter *adapter,
  88                               struct net_device *netdev,
  89                               struct sk_buff *skb,
  90                               u8 status, __le16 vlan)
  91 {
  92         skb->protocol = eth_type_trans(skb, netdev);
  93
  94         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
  95                 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
  96                                  le16_to_cpu(vlan), skb);
  97         else
  98                 napi_gro_receive(&adapter->napi, skb);
  99 }
 100
 101 /**
 102  * e1000_rx_checksum - Receive Checksum Offload for 82543
 103  * @adapter:     board private structure
 104  * @status_err:  receive descriptor status and error fields
 105  * @csum:       receive descriptor csum field
 106  * @sk_buff:     socket buffer with received data
 107  **/
 108 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 109                               u32 csum, struct sk_buff *skb)
 110 {
 111         u16 status = (u16)status_err;
 112         u8 errors = (u8)(status_err >> 24);
 113         skb->ip_summed = CHECKSUM_NONE;
 114
 115         /* Ignore Checksum bit is set */
 116         if (status & E1000_RXD_STAT_IXSM)
 117                 return;
 118         /* TCP/UDP checksum error bit is set */
 119         if (errors & E1000_RXD_ERR_TCPE) {
 120                 /* let the stack verify checksum errors */
 121                 adapter->hw_csum_err++;
 122                 return;
 123         }
 124
 125         /* TCP/UDP Checksum has not been calculated */
 126         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 127                 return;
 128
 129         /* It must be a TCP or UDP packet with a valid checksum */
 130         if (status & E1000_RXD_STAT_TCPCS) {
 131                 /* TCP checksum is good */
 132                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 133         } else {
 134                 /*
 135                  * IP fragment with UDP payload
 136                  * Hardware complements the payload checksum, so we undo it
 137                  * and then put the value in host order for further stack use.
 138                  */
 139                 __sum16 sum = (__force __sum16)htons(csum);
 140                 skb->csum = csum_unfold(~sum);
 141                 skb->ip_summed = CHECKSUM_COMPLETE;
 142         }
 143         adapter->hw_csum_good++;
 144 }
 145
 146 /**
 147  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 148  * @adapter: address of board private structure
 149  **/
 150 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 151                                    int cleaned_count)
 152 {
 153         struct net_device *netdev = adapter->netdev;
 154         struct pci_dev *pdev = adapter->pdev;
 155         struct e1000_ring *rx_ring = adapter->rx_ring;
 156         struct e1000_rx_desc *rx_desc;
 157         struct e1000_buffer *buffer_info;
 158         struct sk_buff *skb;
 159         unsigned int i;
 160         unsigned int bufsz = adapter->rx_buffer_len;
 161
 162         i = rx_ring->next_to_use;
 163         buffer_info = &rx_ring->buffer_info[i];
 164
 165         while (cleaned_count--) {
 166                 skb = buffer_info->skb;
 167                 if (skb) {
 168                         skb_trim(skb, 0);
 169                         goto map_skb;
 170                 }
 171
 172                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 173                 if (!skb) {
 174                         /* Better luck next round */
 175                         adapter->alloc_rx_buff_failed++;
 176                         break;
 177                 }
 178
 179                 buffer_info->skb = skb;
 180 map_skb:
 181                 buffer_info->dma = pci_map_single(pdev, skb->data,
 182                                                   adapter->rx_buffer_len,
 183                                                   PCI_DMA_FROMDEVICE);
 184                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 185                         dev_err(&pdev->dev, "RX DMA map failed\n");
 186                         adapter->rx_dma_failed++;
 187                         break;
 188                 }
 189
 190                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 191                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 192
 193                 i++;
 194                 if (i == rx_ring->count)
 195                         i = 0;
 196                 buffer_info = &rx_ring->buffer_info[i];
 197         }
 198
 199         if (rx_ring->next_to_use != i) {
 200                 rx_ring->next_to_use = i;
 201                 if (i-- == 0)
 202                         i = (rx_ring->count - 1);
 203
 204                 /*
 205                  * Force memory writes to complete before letting h/w
 206                  * know there are new descriptors to fetch.  (Only
 207                  * applicable for weak-ordered memory model archs,
 208                  * such as IA-64).
 209                  */
 210                 wmb();
 211                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 212         }
 213 }
 214
 215 /**
 216  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 217  * @adapter: address of board private structure
 218  **/
 219 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 220                                       int cleaned_count)
 221 {
 222         struct net_device *netdev = adapter->netdev;
 223         struct pci_dev *pdev = adapter->pdev;
 224         union e1000_rx_desc_packet_split *rx_desc;
 225         struct e1000_ring *rx_ring = adapter->rx_ring;
 226         struct e1000_buffer *buffer_info;
 227         struct e1000_ps_page *ps_page;
 228         struct sk_buff *skb;
 229         unsigned int i, j;
 230
 231         i = rx_ring->next_to_use;
 232         buffer_info = &rx_ring->buffer_info[i];
 233
 234         while (cleaned_count--) {
 235                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 236
 237                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 238                         ps_page = &buffer_info->ps_pages[j];
 239                         if (j >= adapter->rx_ps_pages) {
 240                                 /* all unused desc entries get hw null ptr */
 241                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 242                                 continue;
 243                         }
 244                         if (!ps_page->page) {
 245                                 ps_page->page = alloc_page(GFP_ATOMIC);
 246                                 if (!ps_page->page) {
 247                                         adapter->alloc_rx_buff_failed++;
 248                                         goto no_buffers;
 249                                 }
 250                                 ps_page->dma = pci_map_page(pdev,
 251                                                    ps_page->page,
 252                                                    0, PAGE_SIZE,
 253                                                    PCI_DMA_FROMDEVICE);
 254                                 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
 255                                         dev_err(&adapter->pdev->dev,
 256                                           "RX DMA page map failed\n");
 257                                         adapter->rx_dma_failed++;
 258                                         goto no_buffers;
 259                                 }
 260                         }
 261                         /*
 262                          * Refresh the desc even if buffer_addrs
 263                          * didn't change because each write-back
 264                          * erases this info.
 265                          */
 266                         rx_desc->read.buffer_addr[j+1] =
 267                              cpu_to_le64(ps_page->dma);
 268                 }
 269
 270                 skb = netdev_alloc_skb_ip_align(netdev,
 271                                                 adapter->rx_ps_bsize0);
 272
 273                 if (!skb) {
 274                         adapter->alloc_rx_buff_failed++;
 275                         break;
 276                 }
 277
 278                 buffer_info->skb = skb;
 279                 buffer_info->dma = pci_map_single(pdev, skb->data,
 280                                                   adapter->rx_ps_bsize0,
 281                                                   PCI_DMA_FROMDEVICE);
 282                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 283                         dev_err(&pdev->dev, "RX DMA map failed\n");
 284                         adapter->rx_dma_failed++;
 285                         /* cleanup skb */
 286                         dev_kfree_skb_any(skb);
 287                         buffer_info->skb = NULL;
 288                         break;
 289                 }
 290
 291                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 292
 293                 i++;
 294                 if (i == rx_ring->count)
 295                         i = 0;
 296                 buffer_info = &rx_ring->buffer_info[i];
 297         }
 298
 299 no_buffers:
 300         if (rx_ring->next_to_use != i) {
 301                 rx_ring->next_to_use = i;
 302
 303                 if (!(i--))
 304                         i = (rx_ring->count - 1);
 305
 306                 /*
 307                  * Force memory writes to complete before letting h/w
 308                  * know there are new descriptors to fetch.  (Only
 309                  * applicable for weak-ordered memory model archs,
 310                  * such as IA-64).
 311                  */
 312                 wmb();
 313                 /*
 314                  * Hardware increments by 16 bytes, but packet split
 315                  * descriptors are 32 bytes...so we increment tail
 316                  * twice as much.
 317                  */
 318                 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 319         }
 320 }
 321
 322 /**
 323  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 324  * @adapter: address of board private structure
 325  * @cleaned_count: number of buffers to allocate this pass
 326  **/
 327
 328 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 329                                          int cleaned_count)
 330 {
 331         struct net_device *netdev = adapter->netdev;
 332         struct pci_dev *pdev = adapter->pdev;
 333         struct e1000_rx_desc *rx_desc;
 334         struct e1000_ring *rx_ring = adapter->rx_ring;
 335         struct e1000_buffer *buffer_info;
 336         struct sk_buff *skb;
 337         unsigned int i;
 338         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 339
 340         i = rx_ring->next_to_use;
 341         buffer_info = &rx_ring->buffer_info[i];
 342
 343         while (cleaned_count--) {
 344                 skb = buffer_info->skb;
 345                 if (skb) {
 346                         skb_trim(skb, 0);
 347                         goto check_page;
 348                 }
 349
 350                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 351                 if (unlikely(!skb)) {
 352                         /* Better luck next round */
 353                         adapter->alloc_rx_buff_failed++;
 354                         break;
 355                 }
 356
 357                 buffer_info->skb = skb;
 358 check_page:
 359                 /* allocate a new page if necessary */
 360                 if (!buffer_info->page) {
 361                         buffer_info->page = alloc_page(GFP_ATOMIC);
 362                         if (unlikely(!buffer_info->page)) {
 363                                 adapter->alloc_rx_buff_failed++;
 364                                 break;
 365                         }
 366                 }
 367
 368                 if (!buffer_info->dma)
 369                         buffer_info->dma = pci_map_page(pdev,
 370                                                         buffer_info->page, 0,
 371                                                         PAGE_SIZE,
 372                                                         PCI_DMA_FROMDEVICE);
 373
 374                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 375                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 376
 377                 if (unlikely(++i == rx_ring->count))
 378                         i = 0;
 379                 buffer_info = &rx_ring->buffer_info[i];
 380         }
 381
 382         if (likely(rx_ring->next_to_use != i)) {
 383                 rx_ring->next_to_use = i;
 384                 if (unlikely(i-- == 0))
 385                         i = (rx_ring->count - 1);
 386
 387                 /* Force memory writes to complete before letting h/w
 388                  * know there are new descriptors to fetch.  (Only
 389                  * applicable for weak-ordered memory model archs,
 390                  * such as IA-64). */
 391                 wmb();
 392                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 393         }
 394 }
 395
 396 /**
 397  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 398  * @adapter: board private structure
 399  *
 400  * the return value indicates whether actual cleaning was done, there
 401  * is no guarantee that everything was cleaned
 402  **/
 403 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 404                                int *work_done, int work_to_do)
 405 {
 406         struct net_device *netdev = adapter->netdev;
 407         struct pci_dev *pdev = adapter->pdev;
 408         struct e1000_hw *hw = &adapter->hw;
 409         struct e1000_ring *rx_ring = adapter->rx_ring;
 410         struct e1000_rx_desc *rx_desc, *next_rxd;
 411         struct e1000_buffer *buffer_info, *next_buffer;
 412         u32 length;
 413         unsigned int i;
 414         int cleaned_count = 0;
 415         bool cleaned = 0;
 416         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 417
 418         i = rx_ring->next_to_clean;
 419         rx_desc = E1000_RX_DESC(*rx_ring, i);
 420         buffer_info = &rx_ring->buffer_info[i];
 421
 422         while (rx_desc->status & E1000_RXD_STAT_DD) {
 423                 struct sk_buff *skb;
 424                 u8 status;
 425
 426                 if (*work_done >= work_to_do)
 427                         break;
 428                 (*work_done)++;
 429
 430                 status = rx_desc->status;
 431                 skb = buffer_info->skb;
 432                 buffer_info->skb = NULL;
 433
 434                 prefetch(skb->data - NET_IP_ALIGN);
 435
 436                 i++;
 437                 if (i == rx_ring->count)
 438                         i = 0;
 439                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 440                 prefetch(next_rxd);
 441
 442                 next_buffer = &rx_ring->buffer_info[i];
 443
 444                 cleaned = 1;
 445                 cleaned_count++;
 446                 pci_unmap_single(pdev,
 447                                  buffer_info->dma,
 448                                  adapter->rx_buffer_len,
 449                                  PCI_DMA_FROMDEVICE);
 450                 buffer_info->dma = 0;
 451
 452                 length = le16_to_cpu(rx_desc->length);
 453
 454                 /*
 455                  * !EOP means multiple descriptors were used to store a single
 456                  * packet, if that's the case we need to toss it.  In fact, we
 457                  * need to toss every packet with the EOP bit clear and the
 458                  * next frame that _does_ have the EOP bit set, as it is by
 459                  * definition only a frame fragment
 460                  */
 461                 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
 462                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 463
 464                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 465                         /* All receives must fit into a single buffer */
 466                         e_dbg("Receive packet consumed multiple buffers\n");
 467                         /* recycle */
 468                         buffer_info->skb = skb;
 469                         if (status & E1000_RXD_STAT_EOP)
 470                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 471                         goto next_desc;
 472                 }
 473
 474                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 475                         /* recycle */
 476                         buffer_info->skb = skb;
 477                         goto next_desc;
 478                 }
 479
 480                 /* adjust length to remove Ethernet CRC */
 481                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 482                         length -= 4;
 483
 484                 total_rx_bytes += length;
 485                 total_rx_packets++;
 486
 487                 /*
 488                  * code added for copybreak, this should improve
 489                  * performance for small packets with large amounts
 490                  * of reassembly being done in the stack
 491                  */
 492                 if (length < copybreak) {
 493                         struct sk_buff *new_skb =
 494                             netdev_alloc_skb_ip_align(netdev, length);
 495                         if (new_skb) {
 496                                 skb_copy_to_linear_data_offset(new_skb,
 497                                                                -NET_IP_ALIGN,
 498                                                                (skb->data -
 499                                                                 NET_IP_ALIGN),
 500                                                                (length +
 501                                                                 NET_IP_ALIGN));
 502                                 /* save the skb in buffer_info as good */
 503                                 buffer_info->skb = skb;
 504                                 skb = new_skb;
 505                         }
 506                         /* else just continue with the old one */
 507                 }
 508                 /* end copybreak code */
 509                 skb_put(skb, length);
 510
 511                 /* Receive Checksum Offload */
 512                 e1000_rx_checksum(adapter,
 513                                   (u32)(status) |
 514                                   ((u32)(rx_desc->errors) << 24),
 515                                   le16_to_cpu(rx_desc->csum), skb);
 516
 517                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 518
 519 next_desc:
 520                 rx_desc->status = 0;
 521
 522                 /* return some buffers to hardware, one at a time is too slow */
 523                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 524                         adapter->alloc_rx_buf(adapter, cleaned_count);
 525                         cleaned_count = 0;
 526                 }
 527
 528                 /* use prefetched values */
 529                 rx_desc = next_rxd;
 530                 buffer_info = next_buffer;
 531         }
 532         rx_ring->next_to_clean = i;
 533
 534         cleaned_count = e1000_desc_unused(rx_ring);
 535         if (cleaned_count)
 536                 adapter->alloc_rx_buf(adapter, cleaned_count);
 537
 538         adapter->total_rx_bytes += total_rx_bytes;
 539         adapter->total_rx_packets += total_rx_packets;
 540         netdev->stats.rx_bytes += total_rx_bytes;
 541         netdev->stats.rx_packets += total_rx_packets;
 542         return cleaned;
 543 }
 544
 545 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 546                              struct e1000_buffer *buffer_info)
 547 {
 548         if (buffer_info->dma) {
 549                 if (buffer_info->mapped_as_page)
 550                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 551                                        buffer_info->length, PCI_DMA_TODEVICE);
 552                 else
 553                         pci_unmap_single(adapter->pdev, buffer_info->dma,
 554                                          buffer_info->length,
 555                                          PCI_DMA_TODEVICE);
 556                 buffer_info->dma = 0;
 557         }
 558         if (buffer_info->skb) {
 559                 dev_kfree_skb_any(buffer_info->skb);
 560                 buffer_info->skb = NULL;
 561         }
 562         buffer_info->time_stamp = 0;
 563 }
 564
 565 static void e1000_print_hw_hang(struct work_struct *work)
 566 {
 567         struct e1000_adapter *adapter = container_of(work,
 568                                                      struct e1000_adapter,
 569                                                      print_hang_task);
 570         struct e1000_ring *tx_ring = adapter->tx_ring;
 571         unsigned int i = tx_ring->next_to_clean;
 572         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 573         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 574         struct e1000_hw *hw = &adapter->hw;
 575         u16 phy_status, phy_1000t_status, phy_ext_status;
 576         u16 pci_status;
 577
 578         e1e_rphy(hw, PHY_STATUS, &phy_status);
 579         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
 580         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
 581
 582         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
 583
 584         /* detected Hardware unit hang */
 585         e_err("Detected Hardware Unit Hang:\n"
 586               "  TDH                  <%x>\n"
 587               "  TDT                  <%x>\n"
 588               "  next_to_use          <%x>\n"
 589               "  next_to_clean        <%x>\n"
 590               "buffer_info[next_to_clean]:\n"
 591               "  time_stamp           <%lx>\n"
 592               "  next_to_watch        <%x>\n"
 593               "  jiffies              <%lx>\n"
 594               "  next_to_watch.status <%x>\n"
 595               "MAC Status             <%x>\n"
 596               "PHY Status             <%x>\n"
 597               "PHY 1000BASE-T Status  <%x>\n"
 598               "PHY Extended Status    <%x>\n"
 599               "PCI Status             <%x>\n",
 600               readl(adapter->hw.hw_addr + tx_ring->head),
 601               readl(adapter->hw.hw_addr + tx_ring->tail),
 602               tx_ring->next_to_use,
 603               tx_ring->next_to_clean,
 604               tx_ring->buffer_info[eop].time_stamp,
 605               eop,
 606               jiffies,
 607               eop_desc->upper.fields.status,
 608               er32(STATUS),
 609               phy_status,
 610               phy_1000t_status,
 611               phy_ext_status,
 612               pci_status);
 613 }
 614
 615 /**
 616  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 617  * @adapter: board private structure
 618  *
 619  * the return value indicates whether actual cleaning was done, there
 620  * is no guarantee that everything was cleaned
 621  **/
 622 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 623 {
 624         struct net_device *netdev = adapter->netdev;
 625         struct e1000_hw *hw = &adapter->hw;
 626         struct e1000_ring *tx_ring = adapter->tx_ring;
 627         struct e1000_tx_desc *tx_desc, *eop_desc;
 628         struct e1000_buffer *buffer_info;
 629         unsigned int i, eop;
 630         unsigned int count = 0;
 631         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 632
 633         i = tx_ring->next_to_clean;
 634         eop = tx_ring->buffer_info[i].next_to_watch;
 635         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 636
 637         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
 638                (count < tx_ring->count)) {
 639                 bool cleaned = false;
 640                 for (; !cleaned; count++) {
 641                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 642                         buffer_info = &tx_ring->buffer_info[i];
 643                         cleaned = (i == eop);
 644
 645                         if (cleaned) {
 646                                 struct sk_buff *skb = buffer_info->skb;
 647                                 unsigned int segs, bytecount;
 648                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 649                                 /* multiply data chunks by size of headers */
 650                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 651                                             skb->len;
 652                                 total_tx_packets += segs;
 653                                 total_tx_bytes += bytecount;
 654                         }
 655
 656                         e1000_put_txbuf(adapter, buffer_info);
 657                         tx_desc->upper.data = 0;
 658
 659                         i++;
 660                         if (i == tx_ring->count)
 661                                 i = 0;
 662                 }
 663
 664                 eop = tx_ring->buffer_info[i].next_to_watch;
 665                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
 666         }
 667
 668         tx_ring->next_to_clean = i;
 669
 670 #define TX_WAKE_THRESHOLD 32
 671         if (count && netif_carrier_ok(netdev) &&
 672             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
 673                 /* Make sure that anybody stopping the queue after this
 674                  * sees the new next_to_clean.
 675                  */
 676                 smp_mb();
 677
 678                 if (netif_queue_stopped(netdev) &&
 679                     !(test_bit(__E1000_DOWN, &adapter->state))) {
 680                         netif_wake_queue(netdev);
 681                         ++adapter->restart_queue;
 682                 }
 683         }
 684
 685         if (adapter->detect_tx_hung) {
 686                 /*
 687                  * Detect a transmit hang in hardware, this serializes the
 688                  * check with the clearing of time_stamp and movement of i
 689                  */
 690                 adapter->detect_tx_hung = 0;
 691                 if (tx_ring->buffer_info[i].time_stamp &&
 692                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
 693                                + (adapter->tx_timeout_factor * HZ)) &&
 694                     !(er32(STATUS) & E1000_STATUS_TXOFF)) {
 695                         schedule_work(&adapter->print_hang_task);
 696                         netif_stop_queue(netdev);
 697                 }
 698         }
 699         adapter->total_tx_bytes += total_tx_bytes;
 700         adapter->total_tx_packets += total_tx_packets;
 701         netdev->stats.tx_bytes += total_tx_bytes;
 702         netdev->stats.tx_packets += total_tx_packets;
 703         return (count < tx_ring->count);
 704 }
 705
 706 /**
 707  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
 708  * @adapter: board private structure
 709  *
 710  * the return value indicates whether actual cleaning was done, there
 711  * is no guarantee that everything was cleaned
 712  **/
 713 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 714                                   int *work_done, int work_to_do)
 715 {
 716         struct e1000_hw *hw = &adapter->hw;
 717         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
 718         struct net_device *netdev = adapter->netdev;
 719         struct pci_dev *pdev = adapter->pdev;
 720         struct e1000_ring *rx_ring = adapter->rx_ring;
 721         struct e1000_buffer *buffer_info, *next_buffer;
 722         struct e1000_ps_page *ps_page;
 723         struct sk_buff *skb;
 724         unsigned int i, j;
 725         u32 length, staterr;
 726         int cleaned_count = 0;
 727         bool cleaned = 0;
 728         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 729
 730         i = rx_ring->next_to_clean;
 731         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 732         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 733         buffer_info = &rx_ring->buffer_info[i];
 734
 735         while (staterr & E1000_RXD_STAT_DD) {
 736                 if (*work_done >= work_to_do)
 737                         break;
 738                 (*work_done)++;
 739                 skb = buffer_info->skb;
 740
 741                 /* in the packet split case this is header only */
 742                 prefetch(skb->data - NET_IP_ALIGN);
 743
 744                 i++;
 745                 if (i == rx_ring->count)
 746                         i = 0;
 747                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
 748                 prefetch(next_rxd);
 749
 750                 next_buffer = &rx_ring->buffer_info[i];
 751
 752                 cleaned = 1;
 753                 cleaned_count++;
 754                 pci_unmap_single(pdev, buffer_info->dma,
 755                                  adapter->rx_ps_bsize0,
 756                                  PCI_DMA_FROMDEVICE);
 757                 buffer_info->dma = 0;
 758
 759                 /* see !EOP comment in other rx routine */
 760                 if (!(staterr & E1000_RXD_STAT_EOP))
 761                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 762
 763                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 764                         e_dbg("Packet Split buffers didn't pick up the full "
 765                               "packet\n");
 766                         dev_kfree_skb_irq(skb);
 767                         if (staterr & E1000_RXD_STAT_EOP)
 768                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 769                         goto next_desc;
 770                 }
 771
 772                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 773                         dev_kfree_skb_irq(skb);
 774                         goto next_desc;
 775                 }
 776
 777                 length = le16_to_cpu(rx_desc->wb.middle.length0);
 778
 779                 if (!length) {
 780                         e_dbg("Last part of the packet spanning multiple "
 781                               "descriptors\n");
 782                         dev_kfree_skb_irq(skb);
 783                         goto next_desc;
 784                 }
 785
 786                 /* Good Receive */
 787                 skb_put(skb, length);
 788
 789                 {
 790                 /*
 791                  * this looks ugly, but it seems compiler issues make it
 792                  * more efficient than reusing j
 793                  */
 794                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
 795
 796                 /*
 797                  * page alloc/put takes too long and effects small packet
 798                  * throughput, so unsplit small packets and save the alloc/put
 799                  * only valid in softirq (napi) context to call kmap_*
 800                  */
 801                 if (l1 && (l1 <= copybreak) &&
 802                     ((length + l1) <= adapter->rx_ps_bsize0)) {
 803                         u8 *vaddr;
 804
 805                         ps_page = &buffer_info->ps_pages[0];
 806
 807                         /*
 808                          * there is no documentation about how to call
 809                          * kmap_atomic, so we can't hold the mapping
 810                          * very long
 811                          */
 812                         pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
 813                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 814                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
 815                         memcpy(skb_tail_pointer(skb), vaddr, l1);
 816                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
 817                         pci_dma_sync_single_for_device(pdev, ps_page->dma,
 818                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 819
 820                         /* remove the CRC */
 821                         if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 822                                 l1 -= 4;
 823
 824                         skb_put(skb, l1);
 825                         goto copydone;
 826                 } /* if */
 827                 }
 828
 829                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 830                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
 831                         if (!length)
 832                                 break;
 833
 834                         ps_page = &buffer_info->ps_pages[j];
 835                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 836                                        PCI_DMA_FROMDEVICE);
 837                         ps_page->dma = 0;
 838                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
 839                         ps_page->page = NULL;
 840                         skb->len += length;
 841                         skb->data_len += length;
 842                         skb->truesize += length;
 843                 }
 844
 845                 /* strip the ethernet crc, problem is we're using pages now so
 846                  * this whole operation can get a little cpu intensive
 847                  */
 848                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 849                         pskb_trim(skb, skb->len - 4);
 850
 851 copydone:
 852                 total_rx_bytes += skb->len;
 853                 total_rx_packets++;
 854
 855                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
 856                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
 857
 858                 if (rx_desc->wb.upper.header_status &
 859                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
 860                         adapter->rx_hdr_split++;
 861
 862                 e1000_receive_skb(adapter, netdev, skb,
 863                                   staterr, rx_desc->wb.middle.vlan);
 864
 865 next_desc:
 866                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
 867                 buffer_info->skb = NULL;
 868
 869                 /* return some buffers to hardware, one at a time is too slow */
 870                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 871                         adapter->alloc_rx_buf(adapter, cleaned_count);
 872                         cleaned_count = 0;
 873                 }
 874
 875                 /* use prefetched values */
 876                 rx_desc = next_rxd;
 877                 buffer_info = next_buffer;
 878
 879                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 880         }
 881         rx_ring->next_to_clean = i;
 882
 883         cleaned_count = e1000_desc_unused(rx_ring);
 884         if (cleaned_count)
 885                 adapter->alloc_rx_buf(adapter, cleaned_count);
 886
 887         adapter->total_rx_bytes += total_rx_bytes;
 888         adapter->total_rx_packets += total_rx_packets;
 889         netdev->stats.rx_bytes += total_rx_bytes;
 890         netdev->stats.rx_packets += total_rx_packets;
 891         return cleaned;
 892 }
 893
 894 /**
 895  * e1000_consume_page - helper function
 896  **/
 897 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
 898                                u16 length)
 899 {
 900         bi->page = NULL;
 901         skb->len += length;
 902         skb->data_len += length;
 903         skb->truesize += length;
 904 }
 905
 906 /**
 907  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
 908  * @adapter: board private structure
 909  *
 910  * the return value indicates whether actual cleaning was done, there
 911  * is no guarantee that everything was cleaned
 912  **/
 913
 914 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
 915                                      int *work_done, int work_to_do)
 916 {
 917         struct net_device *netdev = adapter->netdev;
 918         struct pci_dev *pdev = adapter->pdev;
 919         struct e1000_ring *rx_ring = adapter->rx_ring;
 920         struct e1000_rx_desc *rx_desc, *next_rxd;
 921         struct e1000_buffer *buffer_info, *next_buffer;
 922         u32 length;
 923         unsigned int i;
 924         int cleaned_count = 0;
 925         bool cleaned = false;
 926         unsigned int total_rx_bytes=0, total_rx_packets=0;
 927
 928         i = rx_ring->next_to_clean;
 929         rx_desc = E1000_RX_DESC(*rx_ring, i);
 930         buffer_info = &rx_ring->buffer_info[i];
 931
 932         while (rx_desc->status & E1000_RXD_STAT_DD) {
 933                 struct sk_buff *skb;
 934                 u8 status;
 935
 936                 if (*work_done >= work_to_do)
 937                         break;
 938                 (*work_done)++;
 939
 940                 status = rx_desc->status;
 941                 skb = buffer_info->skb;
 942                 buffer_info->skb = NULL;
 943
 944                 ++i;
 945                 if (i == rx_ring->count)
 946                         i = 0;
 947                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 948                 prefetch(next_rxd);
 949
 950                 next_buffer = &rx_ring->buffer_info[i];
 951
 952                 cleaned = true;
 953                 cleaned_count++;
 954                 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
 955                                PCI_DMA_FROMDEVICE);
 956                 buffer_info->dma = 0;
 957
 958                 length = le16_to_cpu(rx_desc->length);
 959
 960                 /* errors is only valid for DD + EOP descriptors */
 961                 if (unlikely((status & E1000_RXD_STAT_EOP) &&
 962                     (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
 963                                 /* recycle both page and skb */
 964                                 buffer_info->skb = skb;
 965                                 /* an error means any chain goes out the window
 966                                  * too */
 967                                 if (rx_ring->rx_skb_top)
 968                                         dev_kfree_skb(rx_ring->rx_skb_top);
 969                                 rx_ring->rx_skb_top = NULL;
 970                                 goto next_desc;
 971                 }
 972
 973 #define rxtop rx_ring->rx_skb_top
 974                 if (!(status & E1000_RXD_STAT_EOP)) {
 975                         /* this descriptor is only the beginning (or middle) */
 976                         if (!rxtop) {
 977                                 /* this is the beginning of a chain */
 978                                 rxtop = skb;
 979                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
 980                                                    0, length);
 981                         } else {
 982                                 /* this is the middle of a chain */
 983                                 skb_fill_page_desc(rxtop,
 984                                     skb_shinfo(rxtop)->nr_frags,
 985                                     buffer_info->page, 0, length);
 986                                 /* re-use the skb, only consumed the page */
 987                                 buffer_info->skb = skb;
 988                         }
 989                         e1000_consume_page(buffer_info, rxtop, length);
 990                         goto next_desc;
 991                 } else {
 992                         if (rxtop) {
 993                                 /* end of the chain */
 994                                 skb_fill_page_desc(rxtop,
 995                                     skb_shinfo(rxtop)->nr_frags,
 996                                     buffer_info->page, 0, length);
 997                                 /* re-use the current skb, we only consumed the
 998                                  * page */
 999                                 buffer_info->skb = skb;
1000                                 skb = rxtop;
1001                                 rxtop = NULL;
1002                                 e1000_consume_page(buffer_info, skb, length);
1003                         } else {
1004                                 /* no chain, got EOP, this buf is the packet
1005                                  * copybreak to save the put_page/alloc_page */
1006                                 if (length <= copybreak &&
1007                                     skb_tailroom(skb) >= length) {
1008                                         u8 *vaddr;
1009                                         vaddr = kmap_atomic(buffer_info->page,
1010                                                            KM_SKB_DATA_SOFTIRQ);
1011                                         memcpy(skb_tail_pointer(skb), vaddr,
1012                                                length);
1013                                         kunmap_atomic(vaddr,
1014                                                       KM_SKB_DATA_SOFTIRQ);
1015                                         /* re-use the page, so don't erase
1016                                          * buffer_info->page */
1017                                         skb_put(skb, length);
1018                                 } else {
1019                                         skb_fill_page_desc(skb, 0,
1020                                                            buffer_info->page, 0,
1021                                                            length);
1022                                         e1000_consume_page(buffer_info, skb,
1023                                                            length);
1024                                 }
1025                         }
1026                 }
1027
1028                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1029                 e1000_rx_checksum(adapter,
1030                                   (u32)(status) |
1031                                   ((u32)(rx_desc->errors) << 24),
1032                                   le16_to_cpu(rx_desc->csum), skb);
1033
1034                 /* probably a little skewed due to removing CRC */
1035                 total_rx_bytes += skb->len;
1036                 total_rx_packets++;
1037
1038                 /* eth type trans needs skb->data to point to something */
1039                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1040                         e_err("pskb_may_pull failed.\n");
1041                         dev_kfree_skb(skb);
1042                         goto next_desc;
1043                 }
1044
1045                 e1000_receive_skb(adapter, netdev, skb, status,
1046                                   rx_desc->special);
1047
1048 next_desc:
1049                 rx_desc->status = 0;
1050
1051                 /* return some buffers to hardware, one at a time is too slow */
1052                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1053                         adapter->alloc_rx_buf(adapter, cleaned_count);
1054                         cleaned_count = 0;
1055                 }
1056
1057                 /* use prefetched values */
1058                 rx_desc = next_rxd;
1059                 buffer_info = next_buffer;
1060         }
1061         rx_ring->next_to_clean = i;
1062
1063         cleaned_count = e1000_desc_unused(rx_ring);
1064         if (cleaned_count)
1065                 adapter->alloc_rx_buf(adapter, cleaned_count);
1066
1067         adapter->total_rx_bytes += total_rx_bytes;
1068         adapter->total_rx_packets += total_rx_packets;
1069         netdev->stats.rx_bytes += total_rx_bytes;
1070         netdev->stats.rx_packets += total_rx_packets;
1071         return cleaned;
1072 }
1073
1074 /**
1075  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1076  * @adapter: board private structure
1077  **/
1078 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1079 {
1080         struct e1000_ring *rx_ring = adapter->rx_ring;
1081         struct e1000_buffer *buffer_info;
1082         struct e1000_ps_page *ps_page;
1083         struct pci_dev *pdev = adapter->pdev;
1084         unsigned int i, j;
1085
1086         /* Free all the Rx ring sk_buffs */
1087         for (i = 0; i < rx_ring->count; i++) {
1088                 buffer_info = &rx_ring->buffer_info[i];
1089                 if (buffer_info->dma) {
1090                         if (adapter->clean_rx == e1000_clean_rx_irq)
1091                                 pci_unmap_single(pdev, buffer_info->dma,
1092                                                  adapter->rx_buffer_len,
1093                                                  PCI_DMA_FROMDEVICE);
1094                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1095                                 pci_unmap_page(pdev, buffer_info->dma,
1096                                                PAGE_SIZE,
1097                                                PCI_DMA_FROMDEVICE);
1098                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1099                                 pci_unmap_single(pdev, buffer_info->dma,
1100                                                  adapter->rx_ps_bsize0,
1101                                                  PCI_DMA_FROMDEVICE);
1102                         buffer_info->dma = 0;
1103                 }
1104
1105                 if (buffer_info->page) {
1106                         put_page(buffer_info->page);
1107                         buffer_info->page = NULL;
1108                 }
1109
1110                 if (buffer_info->skb) {
1111                         dev_kfree_skb(buffer_info->skb);
1112                         buffer_info->skb = NULL;
1113                 }
1114
1115                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1116                         ps_page = &buffer_info->ps_pages[j];
1117                         if (!ps_page->page)
1118                                 break;
1119                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1120                                        PCI_DMA_FROMDEVICE);
1121                         ps_page->dma = 0;
1122                         put_page(ps_page->page);
1123                         ps_page->page = NULL;
1124                 }
1125         }
1126
1127         /* there also may be some cached data from a chained receive */
1128         if (rx_ring->rx_skb_top) {
1129                 dev_kfree_skb(rx_ring->rx_skb_top);
1130                 rx_ring->rx_skb_top = NULL;
1131         }
1132
1133         /* Zero out the descriptor ring */
1134         memset(rx_ring->desc, 0, rx_ring->size);
1135
1136         rx_ring->next_to_clean = 0;
1137         rx_ring->next_to_use = 0;
1138         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1139
1140         writel(0, adapter->hw.hw_addr + rx_ring->head);
1141         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1142 }
1143
1144 static void e1000e_downshift_workaround(struct work_struct *work)
1145 {
1146         struct e1000_adapter *adapter = container_of(work,
1147                                         struct e1000_adapter, downshift_task);
1148
1149         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1150 }
1151
1152 /**
1153  * e1000_intr_msi - Interrupt Handler
1154  * @irq: interrupt number
1155  * @data: pointer to a network interface device structure
1156  **/
1157 static irqreturn_t e1000_intr_msi(int irq, void *data)
1158 {
1159         struct net_device *netdev = data;
1160         struct e1000_adapter *adapter = netdev_priv(netdev);
1161         struct e1000_hw *hw = &adapter->hw;
1162         u32 icr = er32(ICR);
1163
1164         /*
1165          * read ICR disables interrupts using IAM
1166          */
1167
1168         if (icr & E1000_ICR_LSC) {
1169                 hw->mac.get_link_status = 1;
1170                 /*
1171                  * ICH8 workaround-- Call gig speed drop workaround on cable
1172                  * disconnect (LSC) before accessing any PHY registers
1173                  */
1174                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1175                     (!(er32(STATUS) & E1000_STATUS_LU)))
1176                         schedule_work(&adapter->downshift_task);
1177
1178                 /*
1179                  * 80003ES2LAN workaround-- For packet buffer work-around on
1180                  * link down event; disable receives here in the ISR and reset
1181                  * adapter in watchdog
1182                  */
1183                 if (netif_carrier_ok(netdev) &&
1184                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1185                         /* disable receives */
1186                         u32 rctl = er32(RCTL);
1187                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1188                         adapter->flags |= FLAG_RX_RESTART_NOW;
1189                 }
1190                 /* guard against interrupt when we're going down */
1191                 if (!test_bit(__E1000_DOWN, &adapter->state))
1192                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1193         }
1194
1195         if (napi_schedule_prep(&adapter->napi)) {
1196                 adapter->total_tx_bytes = 0;
1197                 adapter->total_tx_packets = 0;
1198                 adapter->total_rx_bytes = 0;
1199                 adapter->total_rx_packets = 0;
1200                 __napi_schedule(&adapter->napi);
1201         }
1202
1203         return IRQ_HANDLED;
1204 }
1205
1206 /**
1207  * e1000_intr - Interrupt Handler
1208  * @irq: interrupt number
1209  * @data: pointer to a network interface device structure
1210  **/
1211 static irqreturn_t e1000_intr(int irq, void *data)
1212 {
1213         struct net_device *netdev = data;
1214         struct e1000_adapter *adapter = netdev_priv(netdev);
1215         struct e1000_hw *hw = &adapter->hw;
1216         u32 rctl, icr = er32(ICR);
1217
1218         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1219                 return IRQ_NONE;  /* Not our interrupt */
1220
1221         /*
1222          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1223          * not set, then the adapter didn't send an interrupt
1224          */
1225         if (!(icr & E1000_ICR_INT_ASSERTED))
1226                 return IRQ_NONE;
1227
1228         /*
1229          * Interrupt Auto-Mask...upon reading ICR,
1230          * interrupts are masked.  No need for the
1231          * IMC write
1232          */
1233
1234         if (icr & E1000_ICR_LSC) {
1235                 hw->mac.get_link_status = 1;
1236                 /*
1237                  * ICH8 workaround-- Call gig speed drop workaround on cable
1238                  * disconnect (LSC) before accessing any PHY registers
1239                  */
1240                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1241                     (!(er32(STATUS) & E1000_STATUS_LU)))
1242                         schedule_work(&adapter->downshift_task);
1243
1244                 /*
1245                  * 80003ES2LAN workaround--
1246                  * For packet buffer work-around on link down event;
1247                  * disable receives here in the ISR and
1248                  * reset adapter in watchdog
1249                  */
1250                 if (netif_carrier_ok(netdev) &&
1251                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1252                         /* disable receives */
1253                         rctl = er32(RCTL);
1254                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1255                         adapter->flags |= FLAG_RX_RESTART_NOW;
1256                 }
1257                 /* guard against interrupt when we're going down */
1258                 if (!test_bit(__E1000_DOWN, &adapter->state))
1259                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1260         }
1261
1262         if (napi_schedule_prep(&adapter->napi)) {
1263                 adapter->total_tx_bytes = 0;
1264                 adapter->total_tx_packets = 0;
1265                 adapter->total_rx_bytes = 0;
1266                 adapter->total_rx_packets = 0;
1267                 __napi_schedule(&adapter->napi);
1268         }
1269
1270         return IRQ_HANDLED;
1271 }
1272
1273 static irqreturn_t e1000_msix_other(int irq, void *data)
1274 {
1275         struct net_device *netdev = data;
1276         struct e1000_adapter *adapter = netdev_priv(netdev);
1277         struct e1000_hw *hw = &adapter->hw;
1278         u32 icr = er32(ICR);
1279
1280         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1281                 if (!test_bit(__E1000_DOWN, &adapter->state))
1282                         ew32(IMS, E1000_IMS_OTHER);
1283                 return IRQ_NONE;
1284         }
1285
1286         if (icr & adapter->eiac_mask)
1287                 ew32(ICS, (icr & adapter->eiac_mask));
1288
1289         if (icr & E1000_ICR_OTHER) {
1290                 if (!(icr & E1000_ICR_LSC))
1291                         goto no_link_interrupt;
1292                 hw->mac.get_link_status = 1;
1293                 /* guard against interrupt when we're going down */
1294                 if (!test_bit(__E1000_DOWN, &adapter->state))
1295                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1296         }
1297
1298 no_link_interrupt:
1299         if (!test_bit(__E1000_DOWN, &adapter->state))
1300                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1301
1302         return IRQ_HANDLED;
1303 }
1304
1305
1306 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1307 {
1308         struct net_device *netdev = data;
1309         struct e1000_adapter *adapter = netdev_priv(netdev);
1310         struct e1000_hw *hw = &adapter->hw;
1311         struct e1000_ring *tx_ring = adapter->tx_ring;
1312
1313
1314         adapter->total_tx_bytes = 0;
1315         adapter->total_tx_packets = 0;
1316
1317         if (!e1000_clean_tx_irq(adapter))
1318                 /* Ring was not completely cleaned, so fire another interrupt */
1319                 ew32(ICS, tx_ring->ims_val);
1320
1321         return IRQ_HANDLED;
1322 }
1323
1324 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1325 {
1326         struct net_device *netdev = data;
1327         struct e1000_adapter *adapter = netdev_priv(netdev);
1328
1329         /* Write the ITR value calculated at the end of the
1330          * previous interrupt.
1331          */
1332         if (adapter->rx_ring->set_itr) {
1333                 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1334                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1335                 adapter->rx_ring->set_itr = 0;
1336         }
1337
1338         if (napi_schedule_prep(&adapter->napi)) {
1339                 adapter->total_rx_bytes = 0;
1340                 adapter->total_rx_packets = 0;
1341                 __napi_schedule(&adapter->napi);
1342         }
1343         return IRQ_HANDLED;
1344 }
1345
1346 /**
1347  * e1000_configure_msix - Configure MSI-X hardware
1348  *
1349  * e1000_configure_msix sets up the hardware to properly
1350  * generate MSI-X interrupts.
1351  **/
1352 static void e1000_configure_msix(struct e1000_adapter *adapter)
1353 {
1354         struct e1000_hw *hw = &adapter->hw;
1355         struct e1000_ring *rx_ring = adapter->rx_ring;
1356         struct e1000_ring *tx_ring = adapter->tx_ring;
1357         int vector = 0;
1358         u32 ctrl_ext, ivar = 0;
1359
1360         adapter->eiac_mask = 0;
1361
1362         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1363         if (hw->mac.type == e1000_82574) {
1364                 u32 rfctl = er32(RFCTL);
1365                 rfctl |= E1000_RFCTL_ACK_DIS;
1366                 ew32(RFCTL, rfctl);
1367         }
1368
1369 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1370         /* Configure Rx vector */
1371         rx_ring->ims_val = E1000_IMS_RXQ0;
1372         adapter->eiac_mask |= rx_ring->ims_val;
1373         if (rx_ring->itr_val)
1374                 writel(1000000000 / (rx_ring->itr_val * 256),
1375                        hw->hw_addr + rx_ring->itr_register);
1376         else
1377                 writel(1, hw->hw_addr + rx_ring->itr_register);
1378         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1379
1380         /* Configure Tx vector */
1381         tx_ring->ims_val = E1000_IMS_TXQ0;
1382         vector++;
1383         if (tx_ring->itr_val)
1384                 writel(1000000000 / (tx_ring->itr_val * 256),
1385                        hw->hw_addr + tx_ring->itr_register);
1386         else
1387                 writel(1, hw->hw_addr + tx_ring->itr_register);
1388         adapter->eiac_mask |= tx_ring->ims_val;
1389         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1390
1391         /* set vector for Other Causes, e.g. link changes */
1392         vector++;
1393         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1394         if (rx_ring->itr_val)
1395                 writel(1000000000 / (rx_ring->itr_val * 256),
1396                        hw->hw_addr + E1000_EITR_82574(vector));
1397         else
1398                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1399
1400         /* Cause Tx interrupts on every write back */
1401         ivar |= (1 << 31);
1402
1403         ew32(IVAR, ivar);
1404
1405         /* enable MSI-X PBA support */
1406         ctrl_ext = er32(CTRL_EXT);
1407         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1408
1409         /* Auto-Mask Other interrupts upon ICR read */
1410 #define E1000_EIAC_MASK_82574   0x01F00000
1411         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1412         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1413         ew32(CTRL_EXT, ctrl_ext);
1414         e1e_flush();
1415 }
1416
1417 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1418 {
1419         if (adapter->msix_entries) {
1420                 pci_disable_msix(adapter->pdev);
1421                 kfree(adapter->msix_entries);
1422                 adapter->msix_entries = NULL;
1423         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1424                 pci_disable_msi(adapter->pdev);
1425                 adapter->flags &= ~FLAG_MSI_ENABLED;
1426         }
1427
1428         return;
1429 }
1430
1431 /**
1432  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1433  *
1434  * Attempt to configure interrupts using the best available
1435  * capabilities of the hardware and kernel.
1436  **/
1437 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1438 {
1439         int err;
1440         int numvecs, i;
1441
1442
1443         switch (adapter->int_mode) {
1444         case E1000E_INT_MODE_MSIX:
1445                 if (adapter->flags & FLAG_HAS_MSIX) {
1446                         numvecs = 3; /* RxQ0, TxQ0 and other */
1447                         adapter->msix_entries = kcalloc(numvecs,
1448                                                       sizeof(struct msix_entry),
1449                                                       GFP_KERNEL);
1450                         if (adapter->msix_entries) {
1451                                 for (i = 0; i < numvecs; i++)
1452                                         adapter->msix_entries[i].entry = i;
1453
1454                                 err = pci_enable_msix(adapter->pdev,
1455                                                       adapter->msix_entries,
1456                                                       numvecs);
1457                                 if (err == 0)
1458                                         return;
1459                         }
1460                         /* MSI-X failed, so fall through and try MSI */
1461                         e_err("Failed to initialize MSI-X interrupts.  "
1462                               "Falling back to MSI interrupts.\n");
1463                         e1000e_reset_interrupt_capability(adapter);
1464                 }
1465                 adapter->int_mode = E1000E_INT_MODE_MSI;
1466                 /* Fall through */
1467         case E1000E_INT_MODE_MSI:
1468                 if (!pci_enable_msi(adapter->pdev)) {
1469                         adapter->flags |= FLAG_MSI_ENABLED;
1470                 } else {
1471                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1472                         e_err("Failed to initialize MSI interrupts.  Falling "
1473                               "back to legacy interrupts.\n");
1474                 }
1475                 /* Fall through */
1476         case E1000E_INT_MODE_LEGACY:
1477                 /* Don't do anything; this is the system default */
1478                 break;
1479         }
1480
1481         return;
1482 }
1483
1484 /**
1485  * e1000_request_msix - Initialize MSI-X interrupts
1486  *
1487  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1488  * kernel.
1489  **/
1490 static int e1000_request_msix(struct e1000_adapter *adapter)
1491 {
1492         struct net_device *netdev = adapter->netdev;
1493         int err = 0, vector = 0;
1494
1495         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1496                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1497         else
1498                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1499         err = request_irq(adapter->msix_entries[vector].vector,
1500                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1501                           netdev);
1502         if (err)
1503                 goto out;
1504         adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1505         adapter->rx_ring->itr_val = adapter->itr;
1506         vector++;
1507
1508         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1509                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1510         else
1511                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1512         err = request_irq(adapter->msix_entries[vector].vector,
1513                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1514                           netdev);
1515         if (err)
1516                 goto out;
1517         adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1518         adapter->tx_ring->itr_val = adapter->itr;
1519         vector++;
1520
1521         err = request_irq(adapter->msix_entries[vector].vector,
1522                           e1000_msix_other, 0, netdev->name, netdev);
1523         if (err)
1524                 goto out;
1525
1526         e1000_configure_msix(adapter);
1527         return 0;
1528 out:
1529         return err;
1530 }
1531
1532 /**
1533  * e1000_request_irq - initialize interrupts
1534  *
1535  * Attempts to configure interrupts using the best available
1536  * capabilities of the hardware and kernel.
1537  **/
1538 static int e1000_request_irq(struct e1000_adapter *adapter)
1539 {
1540         struct net_device *netdev = adapter->netdev;
1541         int err;
1542
1543         if (adapter->msix_entries) {
1544                 err = e1000_request_msix(adapter);
1545                 if (!err)
1546                         return err;
1547                 /* fall back to MSI */
1548                 e1000e_reset_interrupt_capability(adapter);
1549                 adapter->int_mode = E1000E_INT_MODE_MSI;
1550                 e1000e_set_interrupt_capability(adapter);
1551         }
1552         if (adapter->flags & FLAG_MSI_ENABLED) {
1553                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
1554                                   netdev->name, netdev);
1555                 if (!err)
1556                         return err;
1557
1558                 /* fall back to legacy interrupt */
1559                 e1000e_reset_interrupt_capability(adapter);
1560                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1561         }
1562
1563         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
1564                           netdev->name, netdev);
1565         if (err)
1566                 e_err("Unable to allocate interrupt, Error: %d\n", err);
1567
1568         return err;
1569 }
1570
1571 static void e1000_free_irq(struct e1000_adapter *adapter)
1572 {
1573         struct net_device *netdev = adapter->netdev;
1574
1575         if (adapter->msix_entries) {
1576                 int vector = 0;
1577
1578                 free_irq(adapter->msix_entries[vector].vector, netdev);
1579                 vector++;
1580
1581                 free_irq(adapter->msix_entries[vector].vector, netdev);
1582                 vector++;
1583
1584                 /* Other Causes interrupt vector */
1585                 free_irq(adapter->msix_entries[vector].vector, netdev);
1586                 return;
1587         }
1588
1589         free_irq(adapter->pdev->irq, netdev);
1590 }
1591
1592 /**
1593  * e1000_irq_disable - Mask off interrupt generation on the NIC
1594  **/
1595 static void e1000_irq_disable(struct e1000_adapter *adapter)
1596 {
1597         struct e1000_hw *hw = &adapter->hw;
1598
1599         ew32(IMC, ~0);
1600         if (adapter->msix_entries)
1601                 ew32(EIAC_82574, 0);
1602         e1e_flush();
1603         synchronize_irq(adapter->pdev->irq);
1604 }
1605
1606 /**
1607  * e1000_irq_enable - Enable default interrupt generation settings
1608  **/
1609 static void e1000_irq_enable(struct e1000_adapter *adapter)
1610 {
1611         struct e1000_hw *hw = &adapter->hw;
1612
1613         if (adapter->msix_entries) {
1614                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1615                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1616         } else {
1617                 ew32(IMS, IMS_ENABLE_MASK);
1618         }
1619         e1e_flush();
1620 }
1621
1622 /**
1623  * e1000_get_hw_control - get control of the h/w from f/w
1624  * @adapter: address of board private structure
1625  *
1626  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1627  * For ASF and Pass Through versions of f/w this means that
1628  * the driver is loaded. For AMT version (only with 82573)
1629  * of the f/w this means that the network i/f is open.
1630  **/
1631 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1632 {
1633         struct e1000_hw *hw = &adapter->hw;
1634         u32 ctrl_ext;
1635         u32 swsm;
1636
1637         /* Let firmware know the driver has taken over */
1638         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1639                 swsm = er32(SWSM);
1640                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1641         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1642                 ctrl_ext = er32(CTRL_EXT);
1643                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1644         }
1645 }
1646
1647 /**
1648  * e1000_release_hw_control - release control of the h/w to f/w
1649  * @adapter: address of board private structure
1650  *
1651  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1652  * For ASF and Pass Through versions of f/w this means that the
1653  * driver is no longer loaded. For AMT version (only with 82573) i
1654  * of the f/w this means that the network i/f is closed.
1655  *
1656  **/
1657 static void e1000_release_hw_control(struct e1000_adapter *adapter)
1658 {
1659         struct e1000_hw *hw = &adapter->hw;
1660         u32 ctrl_ext;
1661         u32 swsm;
1662
1663         /* Let firmware taken over control of h/w */
1664         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1665                 swsm = er32(SWSM);
1666                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1667         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1668                 ctrl_ext = er32(CTRL_EXT);
1669                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1670         }
1671 }
1672
1673 /**
1674  * @e1000_alloc_ring - allocate memory for a ring structure
1675  **/
1676 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1677                                 struct e1000_ring *ring)
1678 {
1679         struct pci_dev *pdev = adapter->pdev;
1680
1681         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1682                                         GFP_KERNEL);
1683         if (!ring->desc)
1684                 return -ENOMEM;
1685
1686         return 0;
1687 }
1688
1689 /**
1690  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1691  * @adapter: board private structure
1692  *
1693  * Return 0 on success, negative on failure
1694  **/
1695 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1696 {
1697         struct e1000_ring *tx_ring = adapter->tx_ring;
1698         int err = -ENOMEM, size;
1699
1700         size = sizeof(struct e1000_buffer) * tx_ring->count;
1701         tx_ring->buffer_info = vmalloc(size);
1702         if (!tx_ring->buffer_info)
1703                 goto err;
1704         memset(tx_ring->buffer_info, 0, size);
1705
1706         /* round up to nearest 4K */
1707         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1708         tx_ring->size = ALIGN(tx_ring->size, 4096);
1709
1710         err = e1000_alloc_ring_dma(adapter, tx_ring);
1711         if (err)
1712                 goto err;
1713
1714         tx_ring->next_to_use = 0;
1715         tx_ring->next_to_clean = 0;
1716
1717         return 0;
1718 err:
1719         vfree(tx_ring->buffer_info);
1720         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1721         return err;
1722 }
1723
1724 /**
1725  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1726  * @adapter: board private structure
1727  *
1728  * Returns 0 on success, negative on failure
1729  **/
1730 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1731 {
1732         struct e1000_ring *rx_ring = adapter->rx_ring;
1733         struct e1000_buffer *buffer_info;
1734         int i, size, desc_len, err = -ENOMEM;
1735
1736         size = sizeof(struct e1000_buffer) * rx_ring->count;
1737         rx_ring->buffer_info = vmalloc(size);
1738         if (!rx_ring->buffer_info)
1739                 goto err;
1740         memset(rx_ring->buffer_info, 0, size);
1741
1742         for (i = 0; i < rx_ring->count; i++) {
1743                 buffer_info = &rx_ring->buffer_info[i];
1744                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1745                                                 sizeof(struct e1000_ps_page),
1746                                                 GFP_KERNEL);
1747                 if (!buffer_info->ps_pages)
1748                         goto err_pages;
1749         }
1750
1751         desc_len = sizeof(union e1000_rx_desc_packet_split);
1752
1753         /* Round up to nearest 4K */
1754         rx_ring->size = rx_ring->count * desc_len;
1755         rx_ring->size = ALIGN(rx_ring->size, 4096);
1756
1757         err = e1000_alloc_ring_dma(adapter, rx_ring);
1758         if (err)
1759                 goto err_pages;
1760
1761         rx_ring->next_to_clean = 0;
1762         rx_ring->next_to_use = 0;
1763         rx_ring->rx_skb_top = NULL;
1764
1765         return 0;
1766
1767 err_pages:
1768         for (i = 0; i < rx_ring->count; i++) {
1769                 buffer_info = &rx_ring->buffer_info[i];
1770                 kfree(buffer_info->ps_pages);
1771         }
1772 err:
1773         vfree(rx_ring->buffer_info);
1774         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1775         return err;
1776 }
1777
1778 /**
1779  * e1000_clean_tx_ring - Free Tx Buffers
1780  * @adapter: board private structure
1781  **/
1782 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1783 {
1784         struct e1000_ring *tx_ring = adapter->tx_ring;
1785         struct e1000_buffer *buffer_info;
1786         unsigned long size;
1787         unsigned int i;
1788
1789         for (i = 0; i < tx_ring->count; i++) {
1790                 buffer_info = &tx_ring->buffer_info[i];
1791                 e1000_put_txbuf(adapter, buffer_info);
1792         }
1793
1794         size = sizeof(struct e1000_buffer) * tx_ring->count;
1795         memset(tx_ring->buffer_info, 0, size);
1796
1797         memset(tx_ring->desc, 0, tx_ring->size);
1798
1799         tx_ring->next_to_use = 0;
1800         tx_ring->next_to_clean = 0;
1801
1802         writel(0, adapter->hw.hw_addr + tx_ring->head);
1803         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1804 }
1805
1806 /**
1807  * e1000e_free_tx_resources - Free Tx Resources per Queue
1808  * @adapter: board private structure
1809  *
1810  * Free all transmit software resources
1811  **/
1812 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1813 {
1814         struct pci_dev *pdev = adapter->pdev;
1815         struct e1000_ring *tx_ring = adapter->tx_ring;
1816
1817         e1000_clean_tx_ring(adapter);
1818
1819         vfree(tx_ring->buffer_info);
1820         tx_ring->buffer_info = NULL;
1821
1822         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1823                           tx_ring->dma);
1824         tx_ring->desc = NULL;
1825 }
1826
1827 /**
1828  * e1000e_free_rx_resources - Free Rx Resources
1829  * @adapter: board private structure
1830  *
1831  * Free all receive software resources
1832  **/
1833
1834 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1835 {
1836         struct pci_dev *pdev = adapter->pdev;
1837         struct e1000_ring *rx_ring = adapter->rx_ring;
1838         int i;
1839
1840         e1000_clean_rx_ring(adapter);
1841
1842         for (i = 0; i < rx_ring->count; i++) {
1843                 kfree(rx_ring->buffer_info[i].ps_pages);
1844         }
1845
1846         vfree(rx_ring->buffer_info);
1847         rx_ring->buffer_info = NULL;
1848
1849         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1850                           rx_ring->dma);
1851         rx_ring->desc = NULL;
1852 }
1853
1854 /**
1855  * e1000_update_itr - update the dynamic ITR value based on statistics
1856  * @adapter: pointer to adapter
1857  * @itr_setting: current adapter->itr
1858  * @packets: the number of packets during this measurement interval
1859  * @bytes: the number of bytes during this measurement interval
1860  *
1861  *      Stores a new ITR value based on packets and byte
1862  *      counts during the last interrupt.  The advantage of per interrupt
1863  *      computation is faster updates and more accurate ITR for the current
1864  *      traffic pattern.  Constants in this function were computed
1865  *      based on theoretical maximum wire speed and thresholds were set based
1866  *      on testing data as well as attempting to minimize response time
1867  *      while increasing bulk throughput.  This functionality is controlled
1868  *      by the InterruptThrottleRate module parameter.
1869  **/
1870 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1871                                      u16 itr_setting, int packets,
1872                                      int bytes)
1873 {
1874         unsigned int retval = itr_setting;
1875
1876         if (packets == 0)
1877                 goto update_itr_done;
1878
1879         switch (itr_setting) {
1880         case lowest_latency:
1881                 /* handle TSO and jumbo frames */
1882                 if (bytes/packets > 8000)
1883                         retval = bulk_latency;
1884                 else if ((packets < 5) && (bytes > 512)) {
1885                         retval = low_latency;
1886                 }
1887                 break;
1888         case low_latency:  /* 50 usec aka 20000 ints/s */
1889                 if (bytes > 10000) {
1890                         /* this if handles the TSO accounting */
1891                         if (bytes/packets > 8000) {
1892                                 retval = bulk_latency;
1893                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1894                                 retval = bulk_latency;
1895                         } else if ((packets > 35)) {
1896                                 retval = lowest_latency;
1897                         }
1898                 } else if (bytes/packets > 2000) {
1899                         retval = bulk_latency;
1900                 } else if (packets <= 2 && bytes < 512) {
1901                         retval = lowest_latency;
1902                 }
1903                 break;
1904         case bulk_latency: /* 250 usec aka 4000 ints/s */
1905                 if (bytes > 25000) {
1906                         if (packets > 35) {
1907                                 retval = low_latency;
1908                         }
1909                 } else if (bytes < 6000) {
1910                         retval = low_latency;
1911                 }
1912                 break;
1913         }
1914
1915 update_itr_done:
1916         return retval;
1917 }
1918
1919 static void e1000_set_itr(struct e1000_adapter *adapter)
1920 {
1921         struct e1000_hw *hw = &adapter->hw;
1922         u16 current_itr;
1923         u32 new_itr = adapter->itr;
1924
1925         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1926         if (adapter->link_speed != SPEED_1000) {
1927                 current_itr = 0;
1928                 new_itr = 4000;
1929                 goto set_itr_now;
1930         }
1931
1932         adapter->tx_itr = e1000_update_itr(adapter,
1933                                     adapter->tx_itr,
1934                                     adapter->total_tx_packets,
1935                                     adapter->total_tx_bytes);
1936         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1937         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1938                 adapter->tx_itr = low_latency;
1939
1940         adapter->rx_itr = e1000_update_itr(adapter,
1941                                     adapter->rx_itr,
1942                                     adapter->total_rx_packets,
1943                                     adapter->total_rx_bytes);
1944         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1945         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1946                 adapter->rx_itr = low_latency;
1947
1948         current_itr = max(adapter->rx_itr, adapter->tx_itr);
1949
1950         switch (current_itr) {
1951         /* counts and packets in update_itr are dependent on these numbers */
1952         case lowest_latency:
1953                 new_itr = 70000;
1954                 break;
1955         case low_latency:
1956                 new_itr = 20000; /* aka hwitr = ~200 */
1957                 break;
1958         case bulk_latency:
1959                 new_itr = 4000;
1960                 break;
1961         default:
1962                 break;
1963         }
1964
1965 set_itr_now:
1966         if (new_itr != adapter->itr) {
1967                 /*
1968                  * this attempts to bias the interrupt rate towards Bulk
1969                  * by adding intermediate steps when interrupt rate is
1970                  * increasing
1971                  */
1972                 new_itr = new_itr > adapter->itr ?
1973                              min(adapter->itr + (new_itr >> 2), new_itr) :
1974                              new_itr;
1975                 adapter->itr = new_itr;
1976                 adapter->rx_ring->itr_val = new_itr;
1977                 if (adapter->msix_entries)
1978                         adapter->rx_ring->set_itr = 1;
1979                 else
1980                         ew32(ITR, 1000000000 / (new_itr * 256));
1981         }
1982 }
1983
1984 /**
1985  * e1000_alloc_queues - Allocate memory for all rings
1986  * @adapter: board private structure to initialize
1987  **/
1988 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1989 {
1990         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1991         if (!adapter->tx_ring)
1992                 goto err;
1993
1994         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1995         if (!adapter->rx_ring)
1996                 goto err;
1997
1998         return 0;
1999 err:
2000         e_err("Unable to allocate memory for queues\n");
2001         kfree(adapter->rx_ring);
2002         kfree(adapter->tx_ring);
2003         return -ENOMEM;
2004 }
2005
2006 /**
2007  * e1000_clean - NAPI Rx polling callback
2008  * @napi: struct associated with this polling callback
2009  * @budget: amount of packets driver is allowed to process this poll
2010  **/
2011 static int e1000_clean(struct napi_struct *napi, int budget)
2012 {
2013         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
2014         struct e1000_hw *hw = &adapter->hw;
2015         struct net_device *poll_dev = adapter->netdev;
2016         int tx_cleaned = 1, work_done = 0;
2017
2018         adapter = netdev_priv(poll_dev);
2019
2020         if (adapter->msix_entries &&
2021             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2022                 goto clean_rx;
2023
2024         tx_cleaned = e1000_clean_tx_irq(adapter);
2025
2026 clean_rx:
2027         adapter->clean_rx(adapter, &work_done, budget);
2028
2029         if (!tx_cleaned)
2030                 work_done = budget;
2031
2032         /* If budget not fully consumed, exit the polling mode */
2033         if (work_done < budget) {
2034                 if (adapter->itr_setting & 3)
2035                         e1000_set_itr(adapter);
2036                 napi_complete(napi);
2037                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2038                         if (adapter->msix_entries)
2039                                 ew32(IMS, adapter->rx_ring->ims_val);
2040                         else
2041                                 e1000_irq_enable(adapter);
2042                 }
2043         }
2044
2045         return work_done;
2046 }
2047
2048 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2049 {
2050         struct e1000_adapter *adapter = netdev_priv(netdev);
2051         struct e1000_hw *hw = &adapter->hw;
2052         u32 vfta, index;
2053
2054         /* don't update vlan cookie if already programmed */
2055         if ((adapter->hw.mng_cookie.status &
2056              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2057             (vid == adapter->mng_vlan_id))
2058                 return;
2059
2060         /* add VID to filter table */
2061         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2062                 index = (vid >> 5) & 0x7F;
2063                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2064                 vfta |= (1 << (vid & 0x1F));
2065                 hw->mac.ops.write_vfta(hw, index, vfta);
2066         }
2067 }
2068
2069 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2070 {
2071         struct e1000_adapter *adapter = netdev_priv(netdev);
2072         struct e1000_hw *hw = &adapter->hw;
2073         u32 vfta, index;
2074
2075         if (!test_bit(__E1000_DOWN, &adapter->state))
2076                 e1000_irq_disable(adapter);
2077         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2078
2079         if (!test_bit(__E1000_DOWN, &adapter->state))
2080                 e1000_irq_enable(adapter);
2081
2082         if ((adapter->hw.mng_cookie.status &
2083              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2084             (vid == adapter->mng_vlan_id)) {
2085                 /* release control to f/w */
2086                 e1000_release_hw_control(adapter);
2087                 return;
2088         }
2089
2090         /* remove VID from filter table */
2091         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2092                 index = (vid >> 5) & 0x7F;
2093                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2094                 vfta &= ~(1 << (vid & 0x1F));
2095                 hw->mac.ops.write_vfta(hw, index, vfta);
2096         }
2097 }
2098
2099 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2100 {
2101         struct net_device *netdev = adapter->netdev;
2102         u16 vid = adapter->hw.mng_cookie.vlan_id;
2103         u16 old_vid = adapter->mng_vlan_id;
2104
2105         if (!adapter->vlgrp)
2106                 return;
2107
2108         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2109                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2110                 if (adapter->hw.mng_cookie.status &
2111                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2112                         e1000_vlan_rx_add_vid(netdev, vid);
2113                         adapter->mng_vlan_id = vid;
2114                 }
2115
2116                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2117                                 (vid != old_vid) &&
2118                     !vlan_group_get_device(adapter->vlgrp, old_vid))
2119                         e1000_vlan_rx_kill_vid(netdev, old_vid);
2120         } else {
2121                 adapter->mng_vlan_id = vid;
2122         }
2123 }
2124
2125
2126 static void e1000_vlan_rx_register(struct net_device *netdev,
2127                                    struct vlan_group *grp)
2128 {
2129         struct e1000_adapter *adapter = netdev_priv(netdev);
2130         struct e1000_hw *hw = &adapter->hw;
2131         u32 ctrl, rctl;
2132
2133         if (!test_bit(__E1000_DOWN, &adapter->state))
2134                 e1000_irq_disable(adapter);
2135         adapter->vlgrp = grp;
2136
2137         if (grp) {
2138                 /* enable VLAN tag insert/strip */
2139                 ctrl = er32(CTRL);
2140                 ctrl |= E1000_CTRL_VME;
2141                 ew32(CTRL, ctrl);
2142
2143                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2144                         /* enable VLAN receive filtering */
2145                         rctl = er32(RCTL);
2146                         rctl &= ~E1000_RCTL_CFIEN;
2147                         ew32(RCTL, rctl);
2148                         e1000_update_mng_vlan(adapter);
2149                 }
2150         } else {
2151                 /* disable VLAN tag insert/strip */
2152                 ctrl = er32(CTRL);
2153                 ctrl &= ~E1000_CTRL_VME;
2154                 ew32(CTRL, ctrl);
2155
2156                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2157                         if (adapter->mng_vlan_id !=
2158                             (u16)E1000_MNG_VLAN_NONE) {
2159                                 e1000_vlan_rx_kill_vid(netdev,
2160                                                        adapter->mng_vlan_id);
2161                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2162                         }
2163                 }
2164         }
2165
2166         if (!test_bit(__E1000_DOWN, &adapter->state))
2167                 e1000_irq_enable(adapter);
2168 }
2169
2170 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2171 {
2172         u16 vid;
2173
2174         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2175
2176         if (!adapter->vlgrp)
2177                 return;
2178
2179         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2180                 if (!vlan_group_get_device(adapter->vlgrp, vid))
2181                         continue;
2182                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2183         }
2184 }
2185
2186 static void e1000_init_manageability(struct e1000_adapter *adapter)
2187 {
2188         struct e1000_hw *hw = &adapter->hw;
2189         u32 manc, manc2h;
2190
2191         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2192                 return;
2193
2194         manc = er32(MANC);
2195
2196         /*
2197          * enable receiving management packets to the host. this will probably
2198          * generate destination unreachable messages from the host OS, but
2199          * the packets will be handled on SMBUS
2200          */
2201         manc |= E1000_MANC_EN_MNG2HOST;
2202         manc2h = er32(MANC2H);
2203 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2204 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2205         manc2h |= E1000_MNG2HOST_PORT_623;
2206         manc2h |= E1000_MNG2HOST_PORT_664;
2207         ew32(MANC2H, manc2h);
2208         ew32(MANC, manc);
2209 }
2210
2211 /**
2212  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2213  * @adapter: board private structure
2214  *
2215  * Configure the Tx unit of the MAC after a reset.
2216  **/
2217 static void e1000_configure_tx(struct e1000_adapter *adapter)
2218 {
2219         struct e1000_hw *hw = &adapter->hw;
2220         struct e1000_ring *tx_ring = adapter->tx_ring;
2221         u64 tdba;
2222         u32 tdlen, tctl, tipg, tarc;
2223         u32 ipgr1, ipgr2;
2224
2225         /* Setup the HW Tx Head and Tail descriptor pointers */
2226         tdba = tx_ring->dma;
2227         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2228         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2229         ew32(TDBAH, (tdba >> 32));
2230         ew32(TDLEN, tdlen);
2231         ew32(TDH, 0);
2232         ew32(TDT, 0);
2233         tx_ring->head = E1000_TDH;
2234         tx_ring->tail = E1000_TDT;
2235
2236         /* Set the default values for the Tx Inter Packet Gap timer */
2237         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
2238         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
2239         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
2240
2241         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2242                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
2243
2244         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2245         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2246         ew32(TIPG, tipg);
2247
2248         /* Set the Tx Interrupt Delay register */
2249         ew32(TIDV, adapter->tx_int_delay);
2250         /* Tx irq moderation */
2251         ew32(TADV, adapter->tx_abs_int_delay);
2252
2253         /* Program the Transmit Control Register */
2254         tctl = er32(TCTL);
2255         tctl &= ~E1000_TCTL_CT;
2256         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2257                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2258
2259         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2260                 tarc = er32(TARC(0));
2261                 /*
2262                  * set the speed mode bit, we'll clear it if we're not at
2263                  * gigabit link later
2264                  */
2265 #define SPEED_MODE_BIT (1 << 21)
2266                 tarc |= SPEED_MODE_BIT;
2267                 ew32(TARC(0), tarc);
2268         }
2269
2270         /* errata: program both queues to unweighted RR */
2271         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2272                 tarc = er32(TARC(0));
2273                 tarc |= 1;
2274                 ew32(TARC(0), tarc);
2275                 tarc = er32(TARC(1));
2276                 tarc |= 1;
2277                 ew32(TARC(1), tarc);
2278         }
2279
2280         /* Setup Transmit Descriptor Settings for eop descriptor */
2281         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2282
2283         /* only set IDE if we are delaying interrupts using the timers */
2284         if (adapter->tx_int_delay)
2285                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2286
2287         /* enable Report Status bit */
2288         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2289
2290         ew32(TCTL, tctl);
2291
2292         e1000e_config_collision_dist(hw);
2293 }
2294
2295 /**
2296  * e1000_setup_rctl - configure the receive control registers
2297  * @adapter: Board private structure
2298  **/
2299 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2300                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2301 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2302 {
2303         struct e1000_hw *hw = &adapter->hw;
2304         u32 rctl, rfctl;
2305         u32 psrctl = 0;
2306         u32 pages = 0;
2307
2308         /* Program MC offset vector base */
2309         rctl = er32(RCTL);
2310         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2311         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2312                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2313                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2314
2315         /* Do not Store bad packets */
2316         rctl &= ~E1000_RCTL_SBP;
2317
2318         /* Enable Long Packet receive */
2319         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2320                 rctl &= ~E1000_RCTL_LPE;
2321         else
2322                 rctl |= E1000_RCTL_LPE;
2323
2324         /* Some systems expect that the CRC is included in SMBUS traffic. The
2325          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2326          * host memory when this is enabled
2327          */
2328         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2329                 rctl |= E1000_RCTL_SECRC;
2330
2331         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2332         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2333                 u16 phy_data;
2334
2335                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2336                 phy_data &= 0xfff8;
2337                 phy_data |= (1 << 2);
2338                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2339
2340                 e1e_rphy(hw, 22, &phy_data);
2341                 phy_data &= 0x0fff;
2342                 phy_data |= (1 << 14);
2343                 e1e_wphy(hw, 0x10, 0x2823);
2344                 e1e_wphy(hw, 0x11, 0x0003);
2345                 e1e_wphy(hw, 22, phy_data);
2346         }
2347
2348         /* Setup buffer sizes */
2349         rctl &= ~E1000_RCTL_SZ_4096;
2350         rctl |= E1000_RCTL_BSEX;
2351         switch (adapter->rx_buffer_len) {
2352         case 2048:
2353         default:
2354                 rctl |= E1000_RCTL_SZ_2048;
2355                 rctl &= ~E1000_RCTL_BSEX;
2356                 break;
2357         case 4096:
2358                 rctl |= E1000_RCTL_SZ_4096;
2359                 break;
2360         case 8192:
2361                 rctl |= E1000_RCTL_SZ_8192;
2362                 break;
2363         case 16384:
2364                 rctl |= E1000_RCTL_SZ_16384;
2365                 break;
2366         }
2367
2368         /*
2369          * 82571 and greater support packet-split where the protocol
2370          * header is placed in skb->data and the packet data is
2371          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2372          * In the case of a non-split, skb->data is linearly filled,
2373          * followed by the page buffers.  Therefore, skb->data is
2374          * sized to hold the largest protocol header.
2375          *
2376          * allocations using alloc_page take too long for regular MTU
2377          * so only enable packet split for jumbo frames
2378          *
2379          * Using pages when the page size is greater than 16k wastes
2380          * a lot of memory, since we allocate 3 pages at all times
2381          * per packet.
2382          */
2383         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2384         if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2385             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2386                 adapter->rx_ps_pages = pages;
2387         else
2388                 adapter->rx_ps_pages = 0;
2389
2390         if (adapter->rx_ps_pages) {
2391                 /* Configure extra packet-split registers */
2392                 rfctl = er32(RFCTL);
2393                 rfctl |= E1000_RFCTL_EXTEN;
2394                 /*
2395                  * disable packet split support for IPv6 extension headers,
2396                  * because some malformed IPv6 headers can hang the Rx
2397                  */
2398                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2399                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2400
2401                 ew32(RFCTL, rfctl);
2402
2403                 /* Enable Packet split descriptors */
2404                 rctl |= E1000_RCTL_DTYP_PS;
2405
2406                 psrctl |= adapter->rx_ps_bsize0 >>
2407                         E1000_PSRCTL_BSIZE0_SHIFT;
2408
2409                 switch (adapter->rx_ps_pages) {
2410                 case 3:
2411                         psrctl |= PAGE_SIZE <<
2412                                 E1000_PSRCTL_BSIZE3_SHIFT;
2413                 case 2:
2414                         psrctl |= PAGE_SIZE <<
2415                                 E1000_PSRCTL_BSIZE2_SHIFT;
2416                 case 1:
2417                         psrctl |= PAGE_SIZE >>
2418                                 E1000_PSRCTL_BSIZE1_SHIFT;
2419                         break;
2420                 }
2421
2422                 ew32(PSRCTL, psrctl);
2423         }
2424
2425         ew32(RCTL, rctl);
2426         /* just started the receive unit, no need to restart */
2427         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2428 }
2429
2430 /**
2431  * e1000_configure_rx - Configure Receive Unit after Reset
2432  * @adapter: board private structure
2433  *
2434  * Configure the Rx unit of the MAC after a reset.
2435  **/
2436 static void e1000_configure_rx(struct e1000_adapter *adapter)
2437 {
2438         struct e1000_hw *hw = &adapter->hw;
2439         struct e1000_ring *rx_ring = adapter->rx_ring;
2440         u64 rdba;
2441         u32 rdlen, rctl, rxcsum, ctrl_ext;
2442
2443         if (adapter->rx_ps_pages) {
2444                 /* this is a 32 byte descriptor */
2445                 rdlen = rx_ring->count *
2446                         sizeof(union e1000_rx_desc_packet_split);
2447                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2448                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2449         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2450                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2451                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2452                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2453         } else {
2454                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2455                 adapter->clean_rx = e1000_clean_rx_irq;
2456                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2457         }
2458
2459         /* disable receives while setting up the descriptors */
2460         rctl = er32(RCTL);
2461         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2462         e1e_flush();
2463         msleep(10);
2464
2465         /* set the Receive Delay Timer Register */
2466         ew32(RDTR, adapter->rx_int_delay);
2467
2468         /* irq moderation */
2469         ew32(RADV, adapter->rx_abs_int_delay);
2470         if (adapter->itr_setting != 0)
2471                 ew32(ITR, 1000000000 / (adapter->itr * 256));
2472
2473         ctrl_ext = er32(CTRL_EXT);
2474         /* Auto-Mask interrupts upon ICR access */
2475         ctrl_ext |= E1000_CTRL_EXT_IAME;
2476         ew32(IAM, 0xffffffff);
2477         ew32(CTRL_EXT, ctrl_ext);
2478         e1e_flush();
2479
2480         /*
2481          * Setup the HW Rx Head and Tail Descriptor Pointers and
2482          * the Base and Length of the Rx Descriptor Ring
2483          */
2484         rdba = rx_ring->dma;
2485         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
2486         ew32(RDBAH, (rdba >> 32));
2487         ew32(RDLEN, rdlen);
2488         ew32(RDH, 0);
2489         ew32(RDT, 0);
2490         rx_ring->head = E1000_RDH;
2491         rx_ring->tail = E1000_RDT;
2492
2493         /* Enable Receive Checksum Offload for TCP and UDP */
2494         rxcsum = er32(RXCSUM);
2495         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2496                 rxcsum |= E1000_RXCSUM_TUOFL;
2497
2498                 /*
2499                  * IPv4 payload checksum for UDP fragments must be
2500                  * used in conjunction with packet-split.
2501                  */
2502                 if (adapter->rx_ps_pages)
2503                         rxcsum |= E1000_RXCSUM_IPPCSE;
2504         } else {
2505                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2506                 /* no need to clear IPPCSE as it defaults to 0 */
2507         }
2508         ew32(RXCSUM, rxcsum);
2509
2510         /*
2511          * Enable early receives on supported devices, only takes effect when
2512          * packet size is equal or larger than the specified value (in 8 byte
2513          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2514          */
2515         if (adapter->flags & FLAG_HAS_ERT) {
2516                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2517                         u32 rxdctl = er32(RXDCTL(0));
2518                         ew32(RXDCTL(0), rxdctl | 0x3);
2519                         ew32(ERT, E1000_ERT_2048 | (1 << 13));
2520                         /*
2521                          * With jumbo frames and early-receive enabled,
2522                          * excessive C-state transition latencies result in
2523                          * dropped transactions.
2524                          */
2525                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2526                                                   adapter->netdev->name, 55);
2527                 } else {
2528                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2529                                                   adapter->netdev->name,
2530                                                   PM_QOS_DEFAULT_VALUE);
2531                 }
2532         }
2533
2534         /* Enable Receives */
2535         ew32(RCTL, rctl);
2536 }
2537
2538 /**
2539  *  e1000_update_mc_addr_list - Update Multicast addresses
2540  *  @hw: pointer to the HW structure
2541  *  @mc_addr_list: array of multicast addresses to program
2542  *  @mc_addr_count: number of multicast addresses to program
2543  *
2544  *  Updates the Multicast Table Array.
2545  *  The caller must have a packed mc_addr_list of multicast addresses.
2546  **/
2547 static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2548                                       u32 mc_addr_count)
2549 {
2550         hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count);
2551 }
2552
2553 /**
2554  * e1000_set_multi - Multicast and Promiscuous mode set
2555  * @netdev: network interface device structure
2556  *
2557  * The set_multi entry point is called whenever the multicast address
2558  * list or the network interface flags are updated.  This routine is
2559  * responsible for configuring the hardware for proper multicast,
2560  * promiscuous mode, and all-multi behavior.
2561  **/
2562 static void e1000_set_multi(struct net_device *netdev)
2563 {
2564         struct e1000_adapter *adapter = netdev_priv(netdev);
2565         struct e1000_hw *hw = &adapter->hw;
2566         struct dev_mc_list *mc_ptr;
2567         u8  *mta_list;
2568         u32 rctl;
2569         int i;
2570
2571         /* Check for Promiscuous and All Multicast modes */
2572
2573         rctl = er32(RCTL);
2574
2575         if (netdev->flags & IFF_PROMISC) {
2576                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2577                 rctl &= ~E1000_RCTL_VFE;
2578         } else {
2579                 if (netdev->flags & IFF_ALLMULTI) {
2580                         rctl |= E1000_RCTL_MPE;
2581                         rctl &= ~E1000_RCTL_UPE;
2582                 } else {
2583                         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2584                 }
2585                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
2586                         rctl |= E1000_RCTL_VFE;
2587         }
2588
2589         ew32(RCTL, rctl);
2590
2591         if (!netdev_mc_empty(netdev)) {
2592                 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
2593                 if (!mta_list)
2594                         return;
2595
2596                 /* prepare a packed array of only addresses. */
2597                 i = 0;
2598                 netdev_for_each_mc_addr(mc_ptr, netdev)
2599                         memcpy(mta_list + (i++ * ETH_ALEN),
2600                                mc_ptr->dmi_addr, ETH_ALEN);
2601
2602                 e1000_update_mc_addr_list(hw, mta_list, i);
2603                 kfree(mta_list);
2604         } else {
2605                 /*
2606                  * if we're called from probe, we might not have
2607                  * anything to do here, so clear out the list
2608                  */
2609                 e1000_update_mc_addr_list(hw, NULL, 0);
2610         }
2611 }
2612
2613 /**
2614  * e1000_configure - configure the hardware for Rx and Tx
2615  * @adapter: private board structure
2616  **/
2617 static void e1000_configure(struct e1000_adapter *adapter)
2618 {
2619         e1000_set_multi(adapter->netdev);
2620
2621         e1000_restore_vlan(adapter);
2622         e1000_init_manageability(adapter);
2623
2624         e1000_configure_tx(adapter);
2625         e1000_setup_rctl(adapter);
2626         e1000_configure_rx(adapter);
2627         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
2628 }
2629
2630 /**
2631  * e1000e_power_up_phy - restore link in case the phy was powered down
2632  * @adapter: address of board private structure
2633  *
2634  * The phy may be powered down to save power and turn off link when the
2635  * driver is unloaded and wake on lan is not enabled (among others)
2636  * *** this routine MUST be followed by a call to e1000e_reset ***
2637  **/
2638 void e1000e_power_up_phy(struct e1000_adapter *adapter)
2639 {
2640         if (adapter->hw.phy.ops.power_up)
2641                 adapter->hw.phy.ops.power_up(&adapter->hw);
2642
2643         adapter->hw.mac.ops.setup_link(&adapter->hw);
2644 }
2645
2646 /**
2647  * e1000_power_down_phy - Power down the PHY
2648  *
2649  * Power down the PHY so no link is implied when interface is down.
2650  * The PHY cannot be powered down if management or WoL is active.
2651  */
2652 static void e1000_power_down_phy(struct e1000_adapter *adapter)
2653 {
2654         /* WoL is enabled */
2655         if (adapter->wol)
2656                 return;
2657
2658         if (adapter->hw.phy.ops.power_down)
2659                 adapter->hw.phy.ops.power_down(&adapter->hw);
2660 }
2661
2662 /**
2663  * e1000e_reset - bring the hardware into a known good state
2664  *
2665  * This function boots the hardware and enables some settings that
2666  * require a configuration cycle of the hardware - those cannot be
2667  * set/changed during runtime. After reset the device needs to be
2668  * properly configured for Rx, Tx etc.
2669  */
2670 void e1000e_reset(struct e1000_adapter *adapter)
2671 {
2672         struct e1000_mac_info *mac = &adapter->hw.mac;
2673         struct e1000_fc_info *fc = &adapter->hw.fc;
2674         struct e1000_hw *hw = &adapter->hw;
2675         u32 tx_space, min_tx_space, min_rx_space;
2676         u32 pba = adapter->pba;
2677         u16 hwm;
2678
2679         /* reset Packet Buffer Allocation to default */
2680         ew32(PBA, pba);
2681
2682         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
2683                 /*
2684                  * To maintain wire speed transmits, the Tx FIFO should be
2685                  * large enough to accommodate two full transmit packets,
2686                  * rounded up to the next 1KB and expressed in KB.  Likewise,
2687                  * the Rx FIFO should be large enough to accommodate at least
2688                  * one full receive packet and is similarly rounded up and
2689                  * expressed in KB.
2690                  */
2691                 pba = er32(PBA);
2692                 /* upper 16 bits has Tx packet buffer allocation size in KB */
2693                 tx_space = pba >> 16;
2694                 /* lower 16 bits has Rx packet buffer allocation size in KB */
2695                 pba &= 0xffff;
2696                 /*
2697                  * the Tx fifo also stores 16 bytes of information about the tx
2698                  * but don't include ethernet FCS because hardware appends it
2699                  */
2700                 min_tx_space = (adapter->max_frame_size +
2701                                 sizeof(struct e1000_tx_desc) -
2702                                 ETH_FCS_LEN) * 2;
2703                 min_tx_space = ALIGN(min_tx_space, 1024);
2704                 min_tx_space >>= 10;
2705                 /* software strips receive CRC, so leave room for it */
2706                 min_rx_space = adapter->max_frame_size;
2707                 min_rx_space = ALIGN(min_rx_space, 1024);
2708                 min_rx_space >>= 10;
2709
2710                 /*
2711                  * If current Tx allocation is less than the min Tx FIFO size,
2712                  * and the min Tx FIFO size is less than the current Rx FIFO
2713                  * allocation, take space away from current Rx allocation
2714                  */
2715                 if ((tx_space < min_tx_space) &&
2716                     ((min_tx_space - tx_space) < pba)) {
2717                         pba -= min_tx_space - tx_space;
2718
2719                         /*
2720                          * if short on Rx space, Rx wins and must trump tx
2721                          * adjustment or use Early Receive if available
2722                          */
2723                         if ((pba < min_rx_space) &&
2724                             (!(adapter->flags & FLAG_HAS_ERT)))
2725                                 /* ERT enabled in e1000_configure_rx */
2726                                 pba = min_rx_space;
2727                 }
2728
2729                 ew32(PBA, pba);
2730         }
2731
2732
2733         /*
2734          * flow control settings
2735          *
2736          * The high water mark must be low enough to fit one full frame
2737          * (or the size used for early receive) above it in the Rx FIFO.
2738          * Set it to the lower of:
2739          * - 90% of the Rx FIFO size, and
2740          * - the full Rx FIFO size minus the early receive size (for parts
2741          *   with ERT support assuming ERT set to E1000_ERT_2048), or
2742          * - the full Rx FIFO size minus one full frame
2743          */
2744         if (hw->mac.type == e1000_pchlan) {
2745                 /*
2746                  * Workaround PCH LOM adapter hangs with certain network
2747                  * loads.  If hangs persist, try disabling Tx flow control.
2748                  */
2749                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2750                         fc->high_water = 0x3500;
2751                         fc->low_water  = 0x1500;
2752                 } else {
2753                         fc->high_water = 0x5000;
2754                         fc->low_water  = 0x3000;
2755                 }
2756         } else {
2757                 if ((adapter->flags & FLAG_HAS_ERT) &&
2758                     (adapter->netdev->mtu > ETH_DATA_LEN))
2759                         hwm = min(((pba << 10) * 9 / 10),
2760                                   ((pba << 10) - (E1000_ERT_2048 << 3)));
2761                 else
2762                         hwm = min(((pba << 10) * 9 / 10),
2763                                   ((pba << 10) - adapter->max_frame_size));
2764
2765                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
2766                 fc->low_water = fc->high_water - 8;
2767         }
2768
2769         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
2770                 fc->pause_time = 0xFFFF;
2771         else
2772                 fc->pause_time = E1000_FC_PAUSE_TIME;
2773         fc->send_xon = 1;
2774         fc->current_mode = fc->requested_mode;
2775
2776         /* Allow time for pending master requests to run */
2777         mac->ops.reset_hw(hw);
2778
2779         /*
2780          * For parts with AMT enabled, let the firmware know
2781          * that the network interface is in control
2782          */
2783         if (adapter->flags & FLAG_HAS_AMT)
2784                 e1000_get_hw_control(adapter);
2785
2786         ew32(WUC, 0);
2787         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)
2788                 e1e_wphy(&adapter->hw, BM_WUC, 0);
2789
2790         if (mac->ops.init_hw(hw))
2791                 e_err("Hardware Error\n");
2792
2793         /* additional part of the flow-control workaround above */
2794         if (hw->mac.type == e1000_pchlan)
2795                 ew32(FCRTV_PCH, 0x1000);
2796
2797         e1000_update_mng_vlan(adapter);
2798
2799         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2800         ew32(VET, ETH_P_8021Q);
2801
2802         e1000e_reset_adaptive(hw);
2803         e1000_get_phy_info(hw);
2804
2805         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
2806             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2807                 u16 phy_data = 0;
2808                 /*
2809                  * speed up time to link by disabling smart power down, ignore
2810                  * the return value of this function because there is nothing
2811                  * different we would do if it failed
2812                  */
2813                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2814                 phy_data &= ~IGP02E1000_PM_SPD;
2815                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2816         }
2817 }
2818
2819 int e1000e_up(struct e1000_adapter *adapter)
2820 {
2821         struct e1000_hw *hw = &adapter->hw;
2822
2823         /* DMA latency requirement to workaround early-receive/jumbo issue */
2824         if (adapter->flags & FLAG_HAS_ERT)
2825                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
2826                                        adapter->netdev->name,
2827                                        PM_QOS_DEFAULT_VALUE);
2828
2829         /* hardware has been reset, we need to reload some things */
2830         e1000_configure(adapter);
2831
2832         clear_bit(__E1000_DOWN, &adapter->state);
2833
2834         napi_enable(&adapter->napi);
2835         if (adapter->msix_entries)
2836                 e1000_configure_msix(adapter);
2837         e1000_irq_enable(adapter);
2838
2839         netif_wake_queue(adapter->netdev);
2840
2841         /* fire a link change interrupt to start the watchdog */
2842         ew32(ICS, E1000_ICS_LSC);
2843         return 0;
2844 }
2845
2846 void e1000e_down(struct e1000_adapter *adapter)
2847 {
2848         struct net_device *netdev = adapter->netdev;
2849         struct e1000_hw *hw = &adapter->hw;
2850         u32 tctl, rctl;
2851
2852         /*
2853          * signal that we're down so the interrupt handler does not
2854          * reschedule our watchdog timer
2855          */
2856         set_bit(__E1000_DOWN, &adapter->state);
2857
2858         /* disable receives in the hardware */
2859         rctl = er32(RCTL);
2860         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2861         /* flush and sleep below */
2862
2863         netif_stop_queue(netdev);
2864
2865         /* disable transmits in the hardware */
2866         tctl = er32(TCTL);
2867         tctl &= ~E1000_TCTL_EN;
2868         ew32(TCTL, tctl);
2869         /* flush both disables and wait for them to finish */
2870         e1e_flush();
2871         msleep(10);
2872
2873         napi_disable(&adapter->napi);
2874         e1000_irq_disable(adapter);
2875
2876         del_timer_sync(&adapter->watchdog_timer);
2877         del_timer_sync(&adapter->phy_info_timer);
2878
2879         netif_carrier_off(netdev);
2880         adapter->link_speed = 0;
2881         adapter->link_duplex = 0;
2882
2883         if (!pci_channel_offline(adapter->pdev))
2884                 e1000e_reset(adapter);
2885         e1000_clean_tx_ring(adapter);
2886         e1000_clean_rx_ring(adapter);
2887
2888         if (adapter->flags & FLAG_HAS_ERT)
2889                 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
2890                                           adapter->netdev->name);
2891
2892         /*
2893          * TODO: for power management, we could drop the link and
2894          * pci_disable_device here.
2895          */
2896 }
2897
2898 void e1000e_reinit_locked(struct e1000_adapter *adapter)
2899 {
2900         might_sleep();
2901         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2902                 msleep(1);
2903         e1000e_down(adapter);
2904         e1000e_up(adapter);
2905         clear_bit(__E1000_RESETTING, &adapter->state);
2906 }
2907
2908 /**
2909  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2910  * @adapter: board private structure to initialize
2911  *
2912  * e1000_sw_init initializes the Adapter private data structure.
2913  * Fields are initialized based on PCI device information and
2914  * OS network device settings (MTU size).
2915  **/
2916 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2917 {
2918         struct net_device *netdev = adapter->netdev;
2919
2920         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2921         adapter->rx_ps_bsize0 = 128;
2922         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2923         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2924
2925         e1000e_set_interrupt_capability(adapter);
2926
2927         if (e1000_alloc_queues(adapter))
2928                 return -ENOMEM;
2929
2930         /* Explicitly disable IRQ since the NIC can be in any state. */
2931         e1000_irq_disable(adapter);
2932
2933         set_bit(__E1000_DOWN, &adapter->state);
2934         return 0;
2935 }
2936
2937 /**
2938  * e1000_intr_msi_test - Interrupt Handler
2939  * @irq: interrupt number
2940  * @data: pointer to a network interface device structure
2941  **/
2942 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2943 {
2944         struct net_device *netdev = data;
2945         struct e1000_adapter *adapter = netdev_priv(netdev);
2946         struct e1000_hw *hw = &adapter->hw;
2947         u32 icr = er32(ICR);
2948
2949         e_dbg("icr is %08X\n", icr);
2950         if (icr & E1000_ICR_RXSEQ) {
2951                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2952                 wmb();
2953         }
2954
2955         return IRQ_HANDLED;
2956 }
2957
2958 /**
2959  * e1000_test_msi_interrupt - Returns 0 for successful test
2960  * @adapter: board private struct
2961  *
2962  * code flow taken from tg3.c
2963  **/
2964 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2965 {
2966         struct net_device *netdev = adapter->netdev;
2967         struct e1000_hw *hw = &adapter->hw;
2968         int err;
2969
2970         /* poll_enable hasn't been called yet, so don't need disable */
2971         /* clear any pending events */
2972         er32(ICR);
2973
2974         /* free the real vector and request a test handler */
2975         e1000_free_irq(adapter);
2976         e1000e_reset_interrupt_capability(adapter);
2977
2978         /* Assume that the test fails, if it succeeds then the test
2979          * MSI irq handler will unset this flag */
2980         adapter->flags |= FLAG_MSI_TEST_FAILED;
2981
2982         err = pci_enable_msi(adapter->pdev);
2983         if (err)
2984                 goto msi_test_failed;
2985
2986         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
2987                           netdev->name, netdev);
2988         if (err) {
2989                 pci_disable_msi(adapter->pdev);
2990                 goto msi_test_failed;
2991         }
2992
2993         wmb();
2994
2995         e1000_irq_enable(adapter);
2996
2997         /* fire an unusual interrupt on the test handler */
2998         ew32(ICS, E1000_ICS_RXSEQ);
2999         e1e_flush();
3000         msleep(50);
3001
3002         e1000_irq_disable(adapter);
3003
3004         rmb();
3005
3006         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3007                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3008                 err = -EIO;
3009                 e_info("MSI interrupt test failed!\n");
3010         }
3011
3012         free_irq(adapter->pdev->irq, netdev);
3013         pci_disable_msi(adapter->pdev);
3014
3015         if (err == -EIO)
3016                 goto msi_test_failed;
3017
3018         /* okay so the test worked, restore settings */
3019         e_dbg("MSI interrupt test succeeded!\n");
3020 msi_test_failed:
3021         e1000e_set_interrupt_capability(adapter);
3022         e1000_request_irq(adapter);
3023         return err;
3024 }
3025
3026 /**
3027  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3028  * @adapter: board private struct
3029  *
3030  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3031  **/
3032 static int e1000_test_msi(struct e1000_adapter *adapter)
3033 {
3034         int err;
3035         u16 pci_cmd;
3036
3037         if (!(adapter->flags & FLAG_MSI_ENABLED))
3038                 return 0;
3039
3040         /* disable SERR in case the MSI write causes a master abort */
3041         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3042         pci_write_config_word(adapter->pdev, PCI_COMMAND,
3043                               pci_cmd & ~PCI_COMMAND_SERR);
3044
3045         err = e1000_test_msi_interrupt(adapter);
3046
3047         /* restore previous setting of command word */
3048         pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3049
3050         /* success ! */
3051         if (!err)
3052                 return 0;
3053
3054         /* EIO means MSI test failed */
3055         if (err != -EIO)
3056                 return err;
3057
3058         /* back to INTx mode */
3059         e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3060
3061         e1000_free_irq(adapter);
3062
3063         err = e1000_request_irq(adapter);
3064
3065         return err;
3066 }
3067
3068 /**
3069  * e1000_open - Called when a network interface is made active
3070  * @netdev: network interface device structure
3071  *
3072  * Returns 0 on success, negative value on failure
3073  *
3074  * The open entry point is called when a network interface is made
3075  * active by the system (IFF_UP).  At this point all resources needed
3076  * for transmit and receive operations are allocated, the interrupt
3077  * handler is registered with the OS, the watchdog timer is started,
3078  * and the stack is notified that the interface is ready.
3079  **/
3080 static int e1000_open(struct net_device *netdev)
3081 {
3082         struct e1000_adapter *adapter = netdev_priv(netdev);
3083         struct e1000_hw *hw = &adapter->hw;
3084         int err;
3085
3086         /* disallow open during test */
3087         if (test_bit(__E1000_TESTING, &adapter->state))
3088                 return -EBUSY;
3089
3090         netif_carrier_off(netdev);
3091
3092         /* allocate transmit descriptors */
3093         err = e1000e_setup_tx_resources(adapter);
3094         if (err)
3095                 goto err_setup_tx;
3096
3097         /* allocate receive descriptors */
3098         err = e1000e_setup_rx_resources(adapter);
3099         if (err)
3100                 goto err_setup_rx;
3101
3102         e1000e_power_up_phy(adapter);
3103
3104         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3105         if ((adapter->hw.mng_cookie.status &
3106              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3107                 e1000_update_mng_vlan(adapter);
3108
3109         /*
3110          * If AMT is enabled, let the firmware know that the network
3111          * interface is now open
3112          */
3113         if (adapter->flags & FLAG_HAS_AMT)
3114                 e1000_get_hw_control(adapter);
3115
3116         /*
3117          * before we allocate an interrupt, we must be ready to handle it.
3118          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3119          * as soon as we call pci_request_irq, so we have to setup our
3120          * clean_rx handler before we do so.
3121          */
3122         e1000_configure(adapter);
3123
3124         err = e1000_request_irq(adapter);
3125         if (err)
3126                 goto err_req_irq;
3127
3128         /*
3129          * Work around PCIe errata with MSI interrupts causing some chipsets to
3130          * ignore e1000e MSI messages, which means we need to test our MSI
3131          * interrupt now
3132          */
3133         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3134                 err = e1000_test_msi(adapter);
3135                 if (err) {
3136                         e_err("Interrupt allocation failed\n");
3137                         goto err_req_irq;
3138                 }
3139         }
3140
3141         /* From here on the code is the same as e1000e_up() */
3142         clear_bit(__E1000_DOWN, &adapter->state);
3143
3144         napi_enable(&adapter->napi);
3145
3146         e1000_irq_enable(adapter);
3147
3148         netif_start_queue(netdev);
3149
3150         /* fire a link status change interrupt to start the watchdog */
3151         ew32(ICS, E1000_ICS_LSC);
3152
3153         return 0;
3154
3155 err_req_irq:
3156         e1000_release_hw_control(adapter);
3157         e1000_power_down_phy(adapter);
3158         e1000e_free_rx_resources(adapter);
3159 err_setup_rx:
3160         e1000e_free_tx_resources(adapter);
3161 err_setup_tx:
3162         e1000e_reset(adapter);
3163
3164         return err;
3165 }
3166
3167 /**
3168  * e1000_close - Disables a network interface
3169  * @netdev: network interface device structure
3170  *
3171  * Returns 0, this is not allowed to fail
3172  *
3173  * The close entry point is called when an interface is de-activated
3174  * by the OS.  The hardware is still under the drivers control, but
3175  * needs to be disabled.  A global MAC reset is issued to stop the
3176  * hardware, and all transmit and receive resources are freed.
3177  **/
3178 static int e1000_close(struct net_device *netdev)
3179 {
3180         struct e1000_adapter *adapter = netdev_priv(netdev);
3181
3182         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3183         e1000e_down(adapter);
3184         e1000_power_down_phy(adapter);
3185         e1000_free_irq(adapter);
3186
3187         e1000e_free_tx_resources(adapter);
3188         e1000e_free_rx_resources(adapter);
3189
3190         /*
3191          * kill manageability vlan ID if supported, but not if a vlan with
3192          * the same ID is registered on the host OS (let 8021q kill it)
3193          */
3194         if ((adapter->hw.mng_cookie.status &
3195                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3196              !(adapter->vlgrp &&
3197                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3198                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3199
3200         /*
3201          * If AMT is enabled, let the firmware know that the network
3202          * interface is now closed
3203          */
3204         if (adapter->flags & FLAG_HAS_AMT)
3205                 e1000_release_hw_control(adapter);
3206
3207         return 0;
3208 }
3209 /**
3210  * e1000_set_mac - Change the Ethernet Address of the NIC
3211  * @netdev: network interface device structure
3212  * @p: pointer to an address structure
3213  *
3214  * Returns 0 on success, negative on failure
3215  **/
3216 static int e1000_set_mac(struct net_device *netdev, void *p)
3217 {
3218         struct e1000_adapter *adapter = netdev_priv(netdev);
3219         struct sockaddr *addr = p;
3220
3221         if (!is_valid_ether_addr(addr->sa_data))
3222                 return -EADDRNOTAVAIL;
3223
3224         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3225         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3226
3227         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3228
3229         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3230                 /* activate the work around */
3231                 e1000e_set_laa_state_82571(&adapter->hw, 1);
3232
3233                 /*
3234                  * Hold a copy of the LAA in RAR[14] This is done so that
3235                  * between the time RAR[0] gets clobbered  and the time it
3236                  * gets fixed (in e1000_watchdog), the actual LAA is in one
3237                  * of the RARs and no incoming packets directed to this port
3238                  * are dropped. Eventually the LAA will be in RAR[0] and
3239                  * RAR[14]
3240                  */
3241                 e1000e_rar_set(&adapter->hw,
3242                               adapter->hw.mac.addr,
3243                               adapter->hw.mac.rar_entry_count - 1);
3244         }
3245
3246         return 0;
3247 }
3248
3249 /**
3250  * e1000e_update_phy_task - work thread to update phy
3251  * @work: pointer to our work struct
3252  *
3253  * this worker thread exists because we must acquire a
3254  * semaphore to read the phy, which we could msleep while
3255  * waiting for it, and we can't msleep in a timer.
3256  **/
3257 static void e1000e_update_phy_task(struct work_struct *work)
3258 {
3259         struct e1000_adapter *adapter = container_of(work,
3260                                         struct e1000_adapter, update_phy_task);
3261         e1000_get_phy_info(&adapter->hw);
3262 }
3263
3264 /*
3265  * Need to wait a few seconds after link up to get diagnostic information from
3266  * the phy
3267  */
3268 static void e1000_update_phy_info(unsigned long data)
3269 {
3270         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3271         schedule_work(&adapter->update_phy_task);
3272 }
3273
3274 /**
3275  * e1000e_update_stats - Update the board statistics counters
3276  * @adapter: board private structure
3277  **/
3278 void e1000e_update_stats(struct e1000_adapter *adapter)
3279 {
3280         struct net_device *netdev = adapter->netdev;
3281         struct e1000_hw *hw = &adapter->hw;
3282         struct pci_dev *pdev = adapter->pdev;
3283         u16 phy_data;
3284
3285         /*
3286          * Prevent stats update while adapter is being reset, or if the pci
3287          * connection is down.
3288          */
3289         if (adapter->link_speed == 0)
3290                 return;
3291         if (pci_channel_offline(pdev))
3292                 return;
3293
3294         adapter->stats.crcerrs += er32(CRCERRS);
3295         adapter->stats.gprc += er32(GPRC);
3296         adapter->stats.gorc += er32(GORCL);
3297         er32(GORCH); /* Clear gorc */
3298         adapter->stats.bprc += er32(BPRC);
3299         adapter->stats.mprc += er32(MPRC);
3300         adapter->stats.roc += er32(ROC);
3301
3302         adapter->stats.mpc += er32(MPC);
3303         if ((hw->phy.type == e1000_phy_82578) ||
3304             (hw->phy.type == e1000_phy_82577)) {
3305                 e1e_rphy(hw, HV_SCC_UPPER, &phy_data);
3306                 if (!e1e_rphy(hw, HV_SCC_LOWER, &phy_data))
3307                         adapter->stats.scc += phy_data;
3308
3309                 e1e_rphy(hw, HV_ECOL_UPPER, &phy_data);
3310                 if (!e1e_rphy(hw, HV_ECOL_LOWER, &phy_data))
3311                         adapter->stats.ecol += phy_data;
3312
3313                 e1e_rphy(hw, HV_MCC_UPPER, &phy_data);
3314                 if (!e1e_rphy(hw, HV_MCC_LOWER, &phy_data))
3315                         adapter->stats.mcc += phy_data;
3316
3317                 e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data);
3318                 if (!e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data))
3319                         adapter->stats.latecol += phy_data;
3320
3321                 e1e_rphy(hw, HV_DC_UPPER, &phy_data);
3322                 if (!e1e_rphy(hw, HV_DC_LOWER, &phy_data))
3323                         adapter->stats.dc += phy_data;
3324         } else {
3325                 adapter->stats.scc += er32(SCC);
3326                 adapter->stats.ecol += er32(ECOL);
3327                 adapter->stats.mcc += er32(MCC);
3328                 adapter->stats.latecol += er32(LATECOL);
3329                 adapter->stats.dc += er32(DC);
3330         }
3331         adapter->stats.xonrxc += er32(XONRXC);
3332         adapter->stats.xontxc += er32(XONTXC);
3333         adapter->stats.xoffrxc += er32(XOFFRXC);
3334         adapter->stats.xofftxc += er32(XOFFTXC);
3335         adapter->stats.gptc += er32(GPTC);
3336         adapter->stats.gotc += er32(GOTCL);
3337         er32(GOTCH); /* Clear gotc */
3338         adapter->stats.rnbc += er32(RNBC);
3339         adapter->stats.ruc += er32(RUC);
3340
3341         adapter->stats.mptc += er32(MPTC);
3342         adapter->stats.bptc += er32(BPTC);
3343
3344         /* used for adaptive IFS */
3345
3346         hw->mac.tx_packet_delta = er32(TPT);
3347         adapter->stats.tpt += hw->mac.tx_packet_delta;
3348         if ((hw->phy.type == e1000_phy_82578) ||
3349             (hw->phy.type == e1000_phy_82577)) {
3350                 e1e_rphy(hw, HV_COLC_UPPER, &phy_data);
3351                 if (!e1e_rphy(hw, HV_COLC_LOWER, &phy_data))
3352                         hw->mac.collision_delta = phy_data;
3353         } else {
3354                 hw->mac.collision_delta = er32(COLC);
3355         }
3356         adapter->stats.colc += hw->mac.collision_delta;
3357
3358         adapter->stats.algnerrc += er32(ALGNERRC);
3359         adapter->stats.rxerrc += er32(RXERRC);
3360         if ((hw->phy.type == e1000_phy_82578) ||
3361             (hw->phy.type == e1000_phy_82577)) {
3362                 e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data);
3363                 if (!e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data))
3364                         adapter->stats.tncrs += phy_data;
3365         } else {
3366                 if ((hw->mac.type != e1000_82574) &&
3367                     (hw->mac.type != e1000_82583))
3368                         adapter->stats.tncrs += er32(TNCRS);
3369         }
3370         adapter->stats.cexterr += er32(CEXTERR);
3371         adapter->stats.tsctc += er32(TSCTC);
3372         adapter->stats.tsctfc += er32(TSCTFC);
3373
3374         /* Fill out the OS statistics structure */
3375         netdev->stats.multicast = adapter->stats.mprc;
3376         netdev->stats.collisions = adapter->stats.colc;
3377
3378         /* Rx Errors */
3379
3380         /*
3381          * RLEC on some newer hardware can be incorrect so build
3382          * our own version based on RUC and ROC
3383          */
3384         netdev->stats.rx_errors = adapter->stats.rxerrc +
3385                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3386                 adapter->stats.ruc + adapter->stats.roc +
3387                 adapter->stats.cexterr;
3388         netdev->stats.rx_length_errors = adapter->stats.ruc +
3389                                               adapter->stats.roc;
3390         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3391         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3392         netdev->stats.rx_missed_errors = adapter->stats.mpc;
3393
3394         /* Tx Errors */
3395         netdev->stats.tx_errors = adapter->stats.ecol +
3396                                        adapter->stats.latecol;
3397         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3398         netdev->stats.tx_window_errors = adapter->stats.latecol;
3399         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3400
3401         /* Tx Dropped needs to be maintained elsewhere */
3402
3403         /* Management Stats */
3404         adapter->stats.mgptc += er32(MGTPTC);
3405         adapter->stats.mgprc += er32(MGTPRC);
3406         adapter->stats.mgpdc += er32(MGTPDC);
3407 }
3408
3409 /**
3410  * e1000_phy_read_status - Update the PHY register status snapshot
3411  * @adapter: board private structure
3412  **/
3413 static void e1000_phy_read_status(struct e1000_adapter *adapter)
3414 {
3415         struct e1000_hw *hw = &adapter->hw;
3416         struct e1000_phy_regs *phy = &adapter->phy_regs;
3417         int ret_val;
3418
3419         if ((er32(STATUS) & E1000_STATUS_LU) &&
3420             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3421                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3422                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3423                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3424                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3425                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3426                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3427                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3428                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3429                 if (ret_val)
3430                         e_warn("Error reading PHY register\n");
3431         } else {
3432                 /*
3433                  * Do not read PHY registers if link is not up
3434                  * Set values to typical power-on defaults
3435                  */
3436                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3437                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3438                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3439                              BMSR_ERCAP);
3440                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3441                                   ADVERTISE_ALL | ADVERTISE_CSMA);
3442                 phy->lpa = 0;
3443                 phy->expansion = EXPANSION_ENABLENPAGE;
3444                 phy->ctrl1000 = ADVERTISE_1000FULL;
3445                 phy->stat1000 = 0;
3446                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3447         }
3448 }
3449
3450 static void e1000_print_link_info(struct e1000_adapter *adapter)
3451 {
3452         struct e1000_hw *hw = &adapter->hw;
3453         u32 ctrl = er32(CTRL);
3454
3455         /* Link status message must follow this format for user tools */
3456         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3457                "Flow Control: %s\n",
3458                adapter->netdev->name,
3459                adapter->link_speed,
3460                (adapter->link_duplex == FULL_DUPLEX) ?
3461                                 "Full Duplex" : "Half Duplex",
3462                ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3463                                 "RX/TX" :
3464                ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3465                ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
3466 }
3467
3468 bool e1000e_has_link(struct e1000_adapter *adapter)
3469 {
3470         struct e1000_hw *hw = &adapter->hw;
3471         bool link_active = 0;
3472         s32 ret_val = 0;
3473
3474         /*
3475          * get_link_status is set on LSC (link status) interrupt or
3476          * Rx sequence error interrupt.  get_link_status will stay
3477          * false until the check_for_link establishes link
3478          * for copper adapters ONLY
3479          */
3480         switch (hw->phy.media_type) {
3481         case e1000_media_type_copper:
3482                 if (hw->mac.get_link_status) {
3483                         ret_val = hw->mac.ops.check_for_link(hw);
3484                         link_active = !hw->mac.get_link_status;
3485                 } else {
3486                         link_active = 1;
3487                 }
3488                 break;
3489         case e1000_media_type_fiber:
3490                 ret_val = hw->mac.ops.check_for_link(hw);
3491                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3492                 break;
3493         case e1000_media_type_internal_serdes:
3494                 ret_val = hw->mac.ops.check_for_link(hw);
3495                 link_active = adapter->hw.mac.serdes_has_link;
3496                 break;
3497         default:
3498         case e1000_media_type_unknown:
3499                 break;
3500         }
3501
3502         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3503             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3504                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3505                 e_info("Gigabit has been disabled, downgrading speed\n");
3506         }
3507
3508         return link_active;
3509 }
3510
3511 static void e1000e_enable_receives(struct e1000_adapter *adapter)
3512 {
3513         /* make sure the receive unit is started */
3514         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3515             (adapter->flags & FLAG_RX_RESTART_NOW)) {
3516                 struct e1000_hw *hw = &adapter->hw;
3517                 u32 rctl = er32(RCTL);
3518                 ew32(RCTL, rctl | E1000_RCTL_EN);
3519                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3520         }
3521 }
3522
3523 /**
3524  * e1000_watchdog - Timer Call-back
3525  * @data: pointer to adapter cast into an unsigned long
3526  **/
3527 static void e1000_watchdog(unsigned long data)
3528 {
3529         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3530
3531         /* Do the rest outside of interrupt context */
3532         schedule_work(&adapter->watchdog_task);
3533
3534         /* TODO: make this use queue_delayed_work() */
3535 }
3536
3537 static void e1000_watchdog_task(struct work_struct *work)
3538 {
3539         struct e1000_adapter *adapter = container_of(work,
3540                                         struct e1000_adapter, watchdog_task);
3541         struct net_device *netdev = adapter->netdev;
3542         struct e1000_mac_info *mac = &adapter->hw.mac;
3543         struct e1000_phy_info *phy = &adapter->hw.phy;
3544         struct e1000_ring *tx_ring = adapter->tx_ring;
3545         struct e1000_hw *hw = &adapter->hw;
3546         u32 link, tctl;
3547         int tx_pending = 0;
3548
3549         link = e1000e_has_link(adapter);
3550         if ((netif_carrier_ok(netdev)) && link) {
3551                 e1000e_enable_receives(adapter);
3552                 goto link_up;
3553         }
3554
3555         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3556             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3557                 e1000_update_mng_vlan(adapter);
3558
3559         if (link) {
3560                 if (!netif_carrier_ok(netdev)) {
3561                         bool txb2b = 1;
3562                         /* update snapshot of PHY registers on LSC */
3563                         e1000_phy_read_status(adapter);
3564                         mac->ops.get_link_up_info(&adapter->hw,
3565                                                    &adapter->link_speed,
3566                                                    &adapter->link_duplex);
3567                         e1000_print_link_info(adapter);
3568                         /*
3569                          * On supported PHYs, check for duplex mismatch only
3570                          * if link has autonegotiated at 10/100 half
3571                          */
3572                         if ((hw->phy.type == e1000_phy_igp_3 ||
3573                              hw->phy.type == e1000_phy_bm) &&
3574                             (hw->mac.autoneg == true) &&
3575                             (adapter->link_speed == SPEED_10 ||
3576                              adapter->link_speed == SPEED_100) &&
3577                             (adapter->link_duplex == HALF_DUPLEX)) {
3578                                 u16 autoneg_exp;
3579
3580                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3581
3582                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3583                                         e_info("Autonegotiated half duplex but"
3584                                                " link partner cannot autoneg. "
3585                                                " Try forcing full duplex if "
3586                                                "link gets many collisions.\n");
3587                         }
3588
3589                         /* adjust timeout factor according to speed/duplex */
3590                         adapter->tx_timeout_factor = 1;
3591                         switch (adapter->link_speed) {
3592                         case SPEED_10:
3593                                 txb2b = 0;
3594                                 adapter->tx_timeout_factor = 16;
3595                                 break;
3596                         case SPEED_100:
3597                                 txb2b = 0;
3598                                 adapter->tx_timeout_factor = 10;
3599                                 break;
3600                         }
3601
3602                         /*
3603                          * workaround: re-program speed mode bit after
3604                          * link-up event
3605                          */
3606                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3607                             !txb2b) {
3608                                 u32 tarc0;
3609                                 tarc0 = er32(TARC(0));
3610                                 tarc0 &= ~SPEED_MODE_BIT;
3611                                 ew32(TARC(0), tarc0);
3612                         }
3613
3614                         /*
3615                          * disable TSO for pcie and 10/100 speeds, to avoid
3616                          * some hardware issues
3617                          */
3618                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
3619                                 switch (adapter->link_speed) {
3620                                 case SPEED_10:
3621                                 case SPEED_100:
3622                                         e_info("10/100 speed: disabling TSO\n");
3623                                         netdev->features &= ~NETIF_F_TSO;
3624                                         netdev->features &= ~NETIF_F_TSO6;
3625                                         break;
3626                                 case SPEED_1000:
3627                                         netdev->features |= NETIF_F_TSO;
3628                                         netdev->features |= NETIF_F_TSO6;
3629                                         break;
3630                                 default:
3631                                         /* oops */
3632                                         break;
3633                                 }
3634                         }
3635
3636                         /*
3637                          * enable transmits in the hardware, need to do this
3638                          * after setting TARC(0)
3639                          */
3640                         tctl = er32(TCTL);
3641                         tctl |= E1000_TCTL_EN;
3642                         ew32(TCTL, tctl);
3643
3644                         /*
3645                          * Perform any post-link-up configuration before
3646                          * reporting link up.
3647                          */
3648                         if (phy->ops.cfg_on_link_up)
3649                                 phy->ops.cfg_on_link_up(hw);
3650
3651                         netif_carrier_on(netdev);
3652
3653                         if (!test_bit(__E1000_DOWN, &adapter->state))
3654                                 mod_timer(&adapter->phy_info_timer,
3655                                           round_jiffies(jiffies + 2 * HZ));
3656                 }
3657         } else {
3658                 if (netif_carrier_ok(netdev)) {
3659                         adapter->link_speed = 0;
3660                         adapter->link_duplex = 0;
3661                         /* Link status message must follow this format */
3662                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
3663                                adapter->netdev->name);
3664                         netif_carrier_off(netdev);
3665                         if (!test_bit(__E1000_DOWN, &adapter->state))
3666                                 mod_timer(&adapter->phy_info_timer,
3667                                           round_jiffies(jiffies + 2 * HZ));
3668
3669                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3670                                 schedule_work(&adapter->reset_task);
3671                 }
3672         }
3673
3674 link_up:
3675         e1000e_update_stats(adapter);
3676
3677         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3678         adapter->tpt_old = adapter->stats.tpt;
3679         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3680         adapter->colc_old = adapter->stats.colc;
3681
3682         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3683         adapter->gorc_old = adapter->stats.gorc;
3684         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3685         adapter->gotc_old = adapter->stats.gotc;
3686
3687         e1000e_update_adaptive(&adapter->hw);
3688
3689         if (!netif_carrier_ok(netdev)) {
3690                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3691                                tx_ring->count);
3692                 if (tx_pending) {
3693                         /*
3694                          * We've lost link, so the controller stops DMA,
3695                          * but we've got queued Tx work that's never going
3696                          * to get done, so reset controller to flush Tx.
3697                          * (Do the reset outside of interrupt context).
3698                          */
3699                         adapter->tx_timeout_count++;
3700                         schedule_work(&adapter->reset_task);
3701                         /* return immediately since reset is imminent */
3702                         return;
3703                 }
3704         }
3705
3706         /* Cause software interrupt to ensure Rx ring is cleaned */
3707         if (adapter->msix_entries)
3708                 ew32(ICS, adapter->rx_ring->ims_val);
3709         else
3710                 ew32(ICS, E1000_ICS_RXDMT0);
3711
3712         /* Force detection of hung controller every watchdog period */
3713         adapter->detect_tx_hung = 1;
3714
3715         /*
3716          * With 82571 controllers, LAA may be overwritten due to controller
3717          * reset from the other port. Set the appropriate LAA in RAR[0]
3718          */
3719         if (e1000e_get_laa_state_82571(hw))
3720                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3721
3722         /* Reset the timer */
3723         if (!test_bit(__E1000_DOWN, &adapter->state))
3724                 mod_timer(&adapter->watchdog_timer,
3725                           round_jiffies(jiffies + 2 * HZ));
3726 }
3727
3728 #define E1000_TX_FLAGS_CSUM             0x00000001
3729 #define E1000_TX_FLAGS_VLAN             0x00000002
3730 #define E1000_TX_FLAGS_TSO              0x00000004
3731 #define E1000_TX_FLAGS_IPV4             0x00000008
3732 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
3733 #define E1000_TX_FLAGS_VLAN_SHIFT       16
3734
3735 static int e1000_tso(struct e1000_adapter *adapter,
3736                      struct sk_buff *skb)
3737 {
3738         struct e1000_ring *tx_ring = adapter->tx_ring;
3739         struct e1000_context_desc *context_desc;
3740         struct e1000_buffer *buffer_info;
3741         unsigned int i;
3742         u32 cmd_length = 0;
3743         u16 ipcse = 0, tucse, mss;
3744         u8 ipcss, ipcso, tucss, tucso, hdr_len;
3745         int err;
3746
3747         if (!skb_is_gso(skb))
3748                 return 0;
3749
3750         if (skb_header_cloned(skb)) {
3751                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3752                 if (err)
3753                         return err;
3754         }
3755
3756         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3757         mss = skb_shinfo(skb)->gso_size;
3758         if (skb->protocol == htons(ETH_P_IP)) {
3759                 struct iphdr *iph = ip_hdr(skb);
3760                 iph->tot_len = 0;
3761                 iph->check = 0;
3762                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
3763                                                          0, IPPROTO_TCP, 0);
3764                 cmd_length = E1000_TXD_CMD_IP;
3765                 ipcse = skb_transport_offset(skb) - 1;
3766         } else if (skb_is_gso_v6(skb)) {
3767                 ipv6_hdr(skb)->payload_len = 0;
3768                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3769                                                        &ipv6_hdr(skb)->daddr,
3770                                                        0, IPPROTO_TCP, 0);
3771                 ipcse = 0;
3772         }
3773         ipcss = skb_network_offset(skb);
3774         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3775         tucss = skb_transport_offset(skb);
3776         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3777         tucse = 0;
3778
3779         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3780                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3781
3782         i = tx_ring->next_to_use;
3783         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3784         buffer_info = &tx_ring->buffer_info[i];
3785
3786         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3787         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3788         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3789         context_desc->upper_setup.tcp_fields.tucss = tucss;
3790         context_desc->upper_setup.tcp_fields.tucso = tucso;
3791         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3792         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3793         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3794         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3795
3796         buffer_info->time_stamp = jiffies;
3797         buffer_info->next_to_watch = i;
3798
3799         i++;
3800         if (i == tx_ring->count)
3801                 i = 0;
3802         tx_ring->next_to_use = i;
3803
3804         return 1;
3805 }
3806
3807 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3808 {
3809         struct e1000_ring *tx_ring = adapter->tx_ring;
3810         struct e1000_context_desc *context_desc;
3811         struct e1000_buffer *buffer_info;
3812         unsigned int i;
3813         u8 css;
3814         u32 cmd_len = E1000_TXD_CMD_DEXT;
3815         __be16 protocol;
3816
3817         if (skb->ip_summed != CHECKSUM_PARTIAL)
3818                 return 0;
3819
3820         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
3821                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
3822         else
3823                 protocol = skb->protocol;
3824
3825         switch (protocol) {
3826         case cpu_to_be16(ETH_P_IP):
3827                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3828                         cmd_len |= E1000_TXD_CMD_TCP;
3829                 break;
3830         case cpu_to_be16(ETH_P_IPV6):
3831                 /* XXX not handling all IPV6 headers */
3832                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3833                         cmd_len |= E1000_TXD_CMD_TCP;
3834                 break;
3835         default:
3836                 if (unlikely(net_ratelimit()))
3837                         e_warn("checksum_partial proto=%x!\n",
3838                                be16_to_cpu(protocol));
3839                 break;
3840         }
3841
3842         css = skb_transport_offset(skb);
3843
3844         i = tx_ring->next_to_use;
3845         buffer_info = &tx_ring->buffer_info[i];
3846         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3847
3848         context_desc->lower_setup.ip_config = 0;
3849         context_desc->upper_setup.tcp_fields.tucss = css;
3850         context_desc->upper_setup.tcp_fields.tucso =
3851                                 css + skb->csum_offset;
3852         context_desc->upper_setup.tcp_fields.tucse = 0;
3853         context_desc->tcp_seg_setup.data = 0;
3854         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
3855
3856         buffer_info->time_stamp = jiffies;
3857         buffer_info->next_to_watch = i;
3858
3859         i++;
3860         if (i == tx_ring->count)
3861                 i = 0;
3862         tx_ring->next_to_use = i;
3863
3864         return 1;
3865 }
3866
3867 #define E1000_MAX_PER_TXD       8192
3868 #define E1000_MAX_TXD_PWR       12
3869
3870 static int e1000_tx_map(struct e1000_adapter *adapter,
3871                         struct sk_buff *skb, unsigned int first,
3872                         unsigned int max_per_txd, unsigned int nr_frags,
3873                         unsigned int mss)
3874 {
3875         struct e1000_ring *tx_ring = adapter->tx_ring;
3876         struct pci_dev *pdev = adapter->pdev;
3877         struct e1000_buffer *buffer_info;
3878         unsigned int len = skb_headlen(skb);
3879         unsigned int offset = 0, size, count = 0, i;
3880         unsigned int f;
3881
3882         i = tx_ring->next_to_use;
3883
3884         while (len) {
3885                 buffer_info = &tx_ring->buffer_info[i];
3886                 size = min(len, max_per_txd);
3887
3888                 buffer_info->length = size;
3889                 buffer_info->time_stamp = jiffies;
3890                 buffer_info->next_to_watch = i;
3891                 buffer_info->dma = pci_map_single(pdev, skb->data + offset,
3892                                                   size, PCI_DMA_TODEVICE);
3893                 buffer_info->mapped_as_page = false;
3894                 if (pci_dma_mapping_error(pdev, buffer_info->dma))
3895                         goto dma_error;
3896
3897                 len -= size;
3898                 offset += size;
3899                 count++;
3900
3901                 if (len) {
3902                         i++;
3903                         if (i == tx_ring->count)
3904                                 i = 0;
3905                 }
3906         }
3907
3908         for (f = 0; f < nr_frags; f++) {
3909                 struct skb_frag_struct *frag;
3910
3911                 frag = &skb_shinfo(skb)->frags[f];
3912                 len = frag->size;
3913                 offset = frag->page_offset;
3914
3915                 while (len) {
3916                         i++;
3917                         if (i == tx_ring->count)
3918                                 i = 0;
3919
3920                         buffer_info = &tx_ring->buffer_info[i];
3921                         size = min(len, max_per_txd);
3922
3923                         buffer_info->length = size;
3924                         buffer_info->time_stamp = jiffies;
3925                         buffer_info->next_to_watch = i;
3926                         buffer_info->dma = pci_map_page(pdev, frag->page,
3927                                                         offset, size,
3928                                                         PCI_DMA_TODEVICE);
3929                         buffer_info->mapped_as_page = true;
3930                         if (pci_dma_mapping_error(pdev, buffer_info->dma))
3931                                 goto dma_error;
3932
3933                         len -= size;
3934                         offset += size;
3935                         count++;
3936                 }
3937         }
3938
3939         tx_ring->buffer_info[i].skb = skb;
3940         tx_ring->buffer_info[first].next_to_watch = i;
3941
3942         return count;
3943
3944 dma_error:
3945         dev_err(&pdev->dev, "TX DMA map failed\n");
3946         buffer_info->dma = 0;
3947         if (count)
3948                 count--;
3949
3950         while (count--) {
3951                 if (i==0)
3952                         i += tx_ring->count;
3953                 i--;
3954                 buffer_info = &tx_ring->buffer_info[i];
3955                 e1000_put_txbuf(adapter, buffer_info);;
3956         }
3957
3958         return 0;
3959 }
3960
3961 static void e1000_tx_queue(struct e1000_adapter *adapter,
3962                            int tx_flags, int count)
3963 {
3964         struct e1000_ring *tx_ring = adapter->tx_ring;
3965         struct e1000_tx_desc *tx_desc = NULL;
3966         struct e1000_buffer *buffer_info;
3967         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3968         unsigned int i;
3969
3970         if (tx_flags & E1000_TX_FLAGS_TSO) {
3971                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3972                              E1000_TXD_CMD_TSE;
3973                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3974
3975                 if (tx_flags & E1000_TX_FLAGS_IPV4)
3976                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3977         }
3978
3979         if (tx_flags & E1000_TX_FLAGS_CSUM) {
3980                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3981                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3982         }
3983
3984         if (tx_flags & E1000_TX_FLAGS_VLAN) {
3985                 txd_lower |= E1000_TXD_CMD_VLE;
3986                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3987         }
3988
3989         i = tx_ring->next_to_use;
3990
3991         while (count--) {
3992                 buffer_info = &tx_ring->buffer_info[i];
3993                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3994                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3995                 tx_desc->lower.data =
3996                         cpu_to_le32(txd_lower | buffer_info->length);
3997                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3998
3999                 i++;
4000                 if (i == tx_ring->count)
4001                         i = 0;
4002         }
4003
4004         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4005
4006         /*
4007          * Force memory writes to complete before letting h/w
4008          * know there are new descriptors to fetch.  (Only
4009          * applicable for weak-ordered memory model archs,
4010          * such as IA-64).
4011          */
4012         wmb();
4013
4014         tx_ring->next_to_use = i;
4015         writel(i, adapter->hw.hw_addr + tx_ring->tail);
4016         /*
4017          * we need this if more than one processor can write to our tail
4018          * at a time, it synchronizes IO on IA64/Altix systems
4019          */
4020         mmiowb();
4021 }
4022
4023 #define MINIMUM_DHCP_PACKET_SIZE 282
4024 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4025                                     struct sk_buff *skb)
4026 {
4027         struct e1000_hw *hw =  &adapter->hw;
4028         u16 length, offset;
4029
4030         if (vlan_tx_tag_present(skb)) {
4031                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4032                     (adapter->hw.mng_cookie.status &
4033                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4034                         return 0;
4035         }
4036
4037         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4038                 return 0;
4039
4040         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4041                 return 0;
4042
4043         {
4044                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4045                 struct udphdr *udp;
4046
4047                 if (ip->protocol != IPPROTO_UDP)
4048                         return 0;
4049
4050                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4051                 if (ntohs(udp->dest) != 67)
4052                         return 0;
4053
4054                 offset = (u8 *)udp + 8 - skb->data;
4055                 length = skb->len - offset;
4056                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4057         }
4058
4059         return 0;
4060 }
4061
4062 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4063 {
4064         struct e1000_adapter *adapter = netdev_priv(netdev);
4065
4066         netif_stop_queue(netdev);
4067         /*
4068          * Herbert's original patch had:
4069          *  smp_mb__after_netif_stop_queue();
4070          * but since that doesn't exist yet, just open code it.
4071          */
4072         smp_mb();
4073
4074         /*
4075          * We need to check again in a case another CPU has just
4076          * made room available.
4077          */
4078         if (e1000_desc_unused(adapter->tx_ring) < size)
4079                 return -EBUSY;
4080
4081         /* A reprieve! */
4082         netif_start_queue(netdev);
4083         ++adapter->restart_queue;
4084         return 0;
4085 }
4086
4087 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4088 {
4089         struct e1000_adapter *adapter = netdev_priv(netdev);
4090
4091         if (e1000_desc_unused(adapter->tx_ring) >= size)
4092                 return 0;
4093         return __e1000_maybe_stop_tx(netdev, size);
4094 }
4095
4096 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4097 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4098                                     struct net_device *netdev)
4099 {
4100         struct e1000_adapter *adapter = netdev_priv(netdev);
4101         struct e1000_ring *tx_ring = adapter->tx_ring;
4102         unsigned int first;
4103         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4104         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4105         unsigned int tx_flags = 0;
4106         unsigned int len = skb->len - skb->data_len;
4107         unsigned int nr_frags;
4108         unsigned int mss;
4109         int count = 0;
4110         int tso;
4111         unsigned int f;
4112
4113         if (test_bit(__E1000_DOWN, &adapter->state)) {
4114                 dev_kfree_skb_any(skb);
4115                 return NETDEV_TX_OK;
4116         }
4117
4118         if (skb->len <= 0) {
4119                 dev_kfree_skb_any(skb);
4120                 return NETDEV_TX_OK;
4121         }
4122
4123         mss = skb_shinfo(skb)->gso_size;
4124         /*
4125          * The controller does a simple calculation to
4126          * make sure there is enough room in the FIFO before
4127          * initiating the DMA for each buffer.  The calc is:
4128          * 4 = ceil(buffer len/mss).  To make sure we don't
4129          * overrun the FIFO, adjust the max buffer len if mss
4130          * drops.
4131          */
4132         if (mss) {
4133                 u8 hdr_len;
4134                 max_per_txd = min(mss << 2, max_per_txd);
4135                 max_txd_pwr = fls(max_per_txd) - 1;
4136
4137                 /*
4138                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4139                  * points to just header, pull a few bytes of payload from
4140                  * frags into skb->data
4141                  */
4142                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4143                 /*
4144                  * we do this workaround for ES2LAN, but it is un-necessary,
4145                  * avoiding it could save a lot of cycles
4146                  */
4147                 if (skb->data_len && (hdr_len == len)) {
4148                         unsigned int pull_size;
4149
4150                         pull_size = min((unsigned int)4, skb->data_len);
4151                         if (!__pskb_pull_tail(skb, pull_size)) {
4152                                 e_err("__pskb_pull_tail failed.\n");
4153                                 dev_kfree_skb_any(skb);
4154                                 return NETDEV_TX_OK;
4155                         }
4156                         len = skb->len - skb->data_len;
4157                 }
4158         }
4159
4160         /* reserve a descriptor for the offload context */
4161         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4162                 count++;
4163         count++;
4164
4165         count += TXD_USE_COUNT(len, max_txd_pwr);
4166
4167         nr_frags = skb_shinfo(skb)->nr_frags;
4168         for (f = 0; f < nr_frags; f++)
4169                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4170                                        max_txd_pwr);
4171
4172         if (adapter->hw.mac.tx_pkt_filtering)
4173                 e1000_transfer_dhcp_info(adapter, skb);
4174
4175         /*
4176          * need: count + 2 desc gap to keep tail from touching
4177          * head, otherwise try next time
4178          */
4179         if (e1000_maybe_stop_tx(netdev, count + 2))
4180                 return NETDEV_TX_BUSY;
4181
4182         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4183                 tx_flags |= E1000_TX_FLAGS_VLAN;
4184                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4185         }
4186
4187         first = tx_ring->next_to_use;
4188
4189         tso = e1000_tso(adapter, skb);
4190         if (tso < 0) {
4191                 dev_kfree_skb_any(skb);
4192                 return NETDEV_TX_OK;
4193         }
4194
4195         if (tso)
4196                 tx_flags |= E1000_TX_FLAGS_TSO;
4197         else if (e1000_tx_csum(adapter, skb))
4198                 tx_flags |= E1000_TX_FLAGS_CSUM;
4199
4200         /*
4201          * Old method was to assume IPv4 packet by default if TSO was enabled.
4202          * 82571 hardware supports TSO capabilities for IPv6 as well...
4203          * no longer assume, we must.
4204          */
4205         if (skb->protocol == htons(ETH_P_IP))
4206                 tx_flags |= E1000_TX_FLAGS_IPV4;
4207
4208         /* if count is 0 then mapping error has occured */
4209         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
4210         if (count) {
4211                 e1000_tx_queue(adapter, tx_flags, count);
4212                 /* Make sure there is space in the ring for the next send. */
4213                 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4214
4215         } else {
4216                 dev_kfree_skb_any(skb);
4217                 tx_ring->buffer_info[first].time_stamp = 0;
4218                 tx_ring->next_to_use = first;
4219         }
4220
4221         return NETDEV_TX_OK;
4222 }
4223
4224 /**
4225  * e1000_tx_timeout - Respond to a Tx Hang
4226  * @netdev: network interface device structure
4227  **/
4228 static void e1000_tx_timeout(struct net_device *netdev)
4229 {
4230         struct e1000_adapter *adapter = netdev_priv(netdev);
4231
4232         /* Do the reset outside of interrupt context */
4233         adapter->tx_timeout_count++;
4234         schedule_work(&adapter->reset_task);
4235 }
4236
4237 static void e1000_reset_task(struct work_struct *work)
4238 {
4239         struct e1000_adapter *adapter;
4240         adapter = container_of(work, struct e1000_adapter, reset_task);
4241
4242         e1000e_reinit_locked(adapter);
4243 }
4244
4245 /**
4246  * e1000_get_stats - Get System Network Statistics
4247  * @netdev: network interface device structure
4248  *
4249  * Returns the address of the device statistics structure.
4250  * The statistics are actually updated from the timer callback.
4251  **/
4252 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4253 {
4254         /* only return the current stats */
4255         return &netdev->stats;
4256 }
4257
4258 /**
4259  * e1000_change_mtu - Change the Maximum Transfer Unit
4260  * @netdev: network interface device structure
4261  * @new_mtu: new value for maximum frame size
4262  *
4263  * Returns 0 on success, negative on failure
4264  **/
4265 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4266 {
4267         struct e1000_adapter *adapter = netdev_priv(netdev);
4268         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4269
4270         /* Jumbo frame support */
4271         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
4272             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
4273                 e_err("Jumbo Frames not supported.\n");
4274                 return -EINVAL;
4275         }
4276
4277         /* Supported frame sizes */
4278         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
4279             (max_frame > adapter->max_hw_frame_size)) {
4280                 e_err("Unsupported MTU setting\n");
4281                 return -EINVAL;
4282         }
4283
4284         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4285                 msleep(1);
4286         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4287         adapter->max_frame_size = max_frame;
4288         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4289         netdev->mtu = new_mtu;
4290         if (netif_running(netdev))
4291                 e1000e_down(adapter);
4292
4293         /*
4294          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4295          * means we reserve 2 more, this pushes us to allocate from the next
4296          * larger slab size.
4297          * i.e. RXBUFFER_2048 --> size-4096 slab
4298          * However with the new *_jumbo_rx* routines, jumbo receives will use
4299          * fragmented skbs
4300          */
4301
4302         if (max_frame <= 2048)
4303                 adapter->rx_buffer_len = 2048;
4304         else
4305                 adapter->rx_buffer_len = 4096;
4306
4307         /* adjust allocation if LPE protects us, and we aren't using SBP */
4308         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4309              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4310                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
4311                                          + ETH_FCS_LEN;
4312
4313         if (netif_running(netdev))
4314                 e1000e_up(adapter);
4315         else
4316                 e1000e_reset(adapter);
4317
4318         clear_bit(__E1000_RESETTING, &adapter->state);
4319
4320         return 0;
4321 }
4322
4323 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4324                            int cmd)
4325 {
4326         struct e1000_adapter *adapter = netdev_priv(netdev);
4327         struct mii_ioctl_data *data = if_mii(ifr);
4328
4329         if (adapter->hw.phy.media_type != e1000_media_type_copper)
4330                 return -EOPNOTSUPP;
4331
4332         switch (cmd) {
4333         case SIOCGMIIPHY:
4334                 data->phy_id = adapter->hw.phy.addr;
4335                 break;
4336         case SIOCGMIIREG:
4337                 e1000_phy_read_status(adapter);
4338
4339                 switch (data->reg_num & 0x1F) {
4340                 case MII_BMCR:
4341                         data->val_out = adapter->phy_regs.bmcr;
4342                         break;
4343                 case MII_BMSR:
4344                         data->val_out = adapter->phy_regs.bmsr;
4345                         break;
4346                 case MII_PHYSID1:
4347                         data->val_out = (adapter->hw.phy.id >> 16);
4348                         break;
4349                 case MII_PHYSID2:
4350                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
4351                         break;
4352                 case MII_ADVERTISE:
4353                         data->val_out = adapter->phy_regs.advertise;
4354                         break;
4355                 case MII_LPA:
4356                         data->val_out = adapter->phy_regs.lpa;
4357                         break;
4358                 case MII_EXPANSION:
4359                         data->val_out = adapter->phy_regs.expansion;
4360                         break;
4361                 case MII_CTRL1000:
4362                         data->val_out = adapter->phy_regs.ctrl1000;
4363                         break;
4364                 case MII_STAT1000:
4365                         data->val_out = adapter->phy_regs.stat1000;
4366                         break;
4367                 case MII_ESTATUS:
4368                         data->val_out = adapter->phy_regs.estatus;
4369                         break;
4370                 default:
4371                         return -EIO;
4372                 }
4373                 break;
4374         case SIOCSMIIREG:
4375         default:
4376                 return -EOPNOTSUPP;
4377         }
4378         return 0;
4379 }
4380
4381 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4382 {
4383         switch (cmd) {
4384         case SIOCGMIIPHY:
4385         case SIOCGMIIREG:
4386         case SIOCSMIIREG:
4387                 return e1000_mii_ioctl(netdev, ifr, cmd);
4388         default:
4389                 return -EOPNOTSUPP;
4390         }
4391 }
4392
4393 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
4394 {
4395         struct e1000_hw *hw = &adapter->hw;
4396         u32 i, mac_reg;
4397         u16 phy_reg;
4398         int retval = 0;
4399
4400         /* copy MAC RARs to PHY RARs */
4401         for (i = 0; i < adapter->hw.mac.rar_entry_count; i++) {
4402                 mac_reg = er32(RAL(i));
4403                 e1e_wphy(hw, BM_RAR_L(i), (u16)(mac_reg & 0xFFFF));
4404                 e1e_wphy(hw, BM_RAR_M(i), (u16)((mac_reg >> 16) & 0xFFFF));
4405                 mac_reg = er32(RAH(i));
4406                 e1e_wphy(hw, BM_RAR_H(i), (u16)(mac_reg & 0xFFFF));
4407                 e1e_wphy(hw, BM_RAR_CTRL(i), (u16)((mac_reg >> 16) & 0xFFFF));
4408         }
4409
4410         /* copy MAC MTA to PHY MTA */
4411         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
4412                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
4413                 e1e_wphy(hw, BM_MTA(i), (u16)(mac_reg & 0xFFFF));
4414                 e1e_wphy(hw, BM_MTA(i) + 1, (u16)((mac_reg >> 16) & 0xFFFF));
4415         }
4416
4417         /* configure PHY Rx Control register */
4418         e1e_rphy(&adapter->hw, BM_RCTL, &phy_reg);
4419         mac_reg = er32(RCTL);
4420         if (mac_reg & E1000_RCTL_UPE)
4421                 phy_reg |= BM_RCTL_UPE;
4422         if (mac_reg & E1000_RCTL_MPE)
4423                 phy_reg |= BM_RCTL_MPE;
4424         phy_reg &= ~(BM_RCTL_MO_MASK);
4425         if (mac_reg & E1000_RCTL_MO_3)
4426                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
4427                                 << BM_RCTL_MO_SHIFT);
4428         if (mac_reg & E1000_RCTL_BAM)
4429                 phy_reg |= BM_RCTL_BAM;
4430         if (mac_reg & E1000_RCTL_PMCF)
4431                 phy_reg |= BM_RCTL_PMCF;
4432         mac_reg = er32(CTRL);
4433         if (mac_reg & E1000_CTRL_RFCE)
4434                 phy_reg |= BM_RCTL_RFCE;
4435         e1e_wphy(&adapter->hw, BM_RCTL, phy_reg);
4436
4437         /* enable PHY wakeup in MAC register */
4438         ew32(WUFC, wufc);
4439         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
4440
4441         /* configure and enable PHY wakeup in PHY registers */
4442         e1e_wphy(&adapter->hw, BM_WUFC, wufc);
4443         e1e_wphy(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
4444
4445         /* activate PHY wakeup */
4446         retval = hw->phy.ops.acquire(hw);
4447         if (retval) {
4448                 e_err("Could not acquire PHY\n");
4449                 return retval;
4450         }
4451         e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4452                                  (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
4453         retval = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
4454         if (retval) {
4455                 e_err("Could not read PHY page 769\n");
4456                 goto out;
4457         }
4458         phy_reg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
4459         retval = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
4460         if (retval)
4461                 e_err("Could not set PHY Host Wakeup bit\n");
4462 out:
4463         hw->phy.ops.release(hw);
4464
4465         return retval;
4466 }
4467
4468 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4469 {
4470         struct net_device *netdev = pci_get_drvdata(pdev);
4471         struct e1000_adapter *adapter = netdev_priv(netdev);
4472         struct e1000_hw *hw = &adapter->hw;
4473         u32 ctrl, ctrl_ext, rctl, status;
4474         u32 wufc = adapter->wol;
4475         int retval = 0;
4476
4477         netif_device_detach(netdev);
4478
4479         if (netif_running(netdev)) {
4480                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4481                 e1000e_down(adapter);
4482                 e1000_free_irq(adapter);
4483         }
4484         e1000e_reset_interrupt_capability(adapter);
4485
4486         retval = pci_save_state(pdev);
4487         if (retval)
4488                 return retval;
4489
4490         status = er32(STATUS);
4491         if (status & E1000_STATUS_LU)
4492                 wufc &= ~E1000_WUFC_LNKC;
4493
4494         if (wufc) {
4495                 e1000_setup_rctl(adapter);
4496                 e1000_set_multi(netdev);
4497
4498                 /* turn on all-multi mode if wake on multicast is enabled */
4499                 if (wufc & E1000_WUFC_MC) {
4500                         rctl = er32(RCTL);
4501                         rctl |= E1000_RCTL_MPE;
4502                         ew32(RCTL, rctl);
4503                 }
4504
4505                 ctrl = er32(CTRL);
4506                 /* advertise wake from D3Cold */
4507                 #define E1000_CTRL_ADVD3WUC 0x00100000
4508                 /* phy power management enable */
4509                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4510                 ctrl |= E1000_CTRL_ADVD3WUC;
4511                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
4512                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
4513                 ew32(CTRL, ctrl);
4514
4515                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4516                     adapter->hw.phy.media_type ==
4517                     e1000_media_type_internal_serdes) {
4518                         /* keep the laser running in D3 */
4519                         ctrl_ext = er32(CTRL_EXT);
4520                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
4521                         ew32(CTRL_EXT, ctrl_ext);
4522                 }
4523
4524                 if (adapter->flags & FLAG_IS_ICH)
4525                         e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4526
4527                 /* Allow time for pending master requests to run */
4528                 e1000e_disable_pcie_master(&adapter->hw);
4529
4530                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4531                         /* enable wakeup by the PHY */
4532                         retval = e1000_init_phy_wakeup(adapter, wufc);
4533                         if (retval)
4534                                 return retval;
4535                 } else {
4536                         /* enable wakeup by the MAC */
4537                         ew32(WUFC, wufc);
4538                         ew32(WUC, E1000_WUC_PME_EN);
4539                 }
4540         } else {
4541                 ew32(WUC, 0);
4542                 ew32(WUFC, 0);
4543         }
4544
4545         *enable_wake = !!wufc;
4546
4547         /* make sure adapter isn't asleep if manageability is enabled */
4548         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
4549             (hw->mac.ops.check_mng_mode(hw)))
4550                 *enable_wake = true;
4551
4552         if (adapter->hw.phy.type == e1000_phy_igp_3)
4553                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4554
4555         /*
4556          * Release control of h/w to f/w.  If f/w is AMT enabled, this
4557          * would have already happened in close and is redundant.
4558          */
4559         e1000_release_hw_control(adapter);
4560
4561         pci_disable_device(pdev);
4562
4563         return 0;
4564 }
4565
4566 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
4567 {
4568         if (sleep && wake) {
4569                 pci_prepare_to_sleep(pdev);
4570                 return;
4571         }
4572
4573         pci_wake_from_d3(pdev, wake);
4574         pci_set_power_state(pdev, PCI_D3hot);
4575 }
4576
4577 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
4578                                     bool wake)
4579 {
4580         struct net_device *netdev = pci_get_drvdata(pdev);
4581         struct e1000_adapter *adapter = netdev_priv(netdev);
4582
4583         /*
4584          * The pci-e switch on some quad port adapters will report a
4585          * correctable error when the MAC transitions from D0 to D3.  To
4586          * prevent this we need to mask off the correctable errors on the
4587          * downstream port of the pci-e switch.
4588          */
4589         if (adapter->flags & FLAG_IS_QUAD_PORT) {
4590                 struct pci_dev *us_dev = pdev->bus->self;
4591                 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
4592                 u16 devctl;
4593
4594                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
4595                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
4596                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
4597
4598                 e1000_power_off(pdev, sleep, wake);
4599
4600                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
4601         } else {
4602                 e1000_power_off(pdev, sleep, wake);
4603         }
4604 }
4605
4606 static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4607 {
4608         int pos;
4609         u16 val;
4610
4611         /*
4612          * 82573 workaround - disable L1 ASPM on mobile chipsets
4613          *
4614          * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4615          * resulting in lost data or garbage information on the pci-e link
4616          * level. This could result in (false) bad EEPROM checksum errors,
4617          * long ping times (up to 2s) or even a system freeze/hang.
4618          *
4619          * Unfortunately this feature saves about 1W power consumption when
4620          * active.
4621          */
4622         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
4623         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4624         if (val & 0x2) {
4625                 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4626                 val &= ~0x2;
4627                 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4628         }
4629 }
4630
4631 #ifdef CONFIG_PM
4632 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4633 {
4634         int retval;
4635         bool wake;
4636
4637         retval = __e1000_shutdown(pdev, &wake);
4638         if (!retval)
4639                 e1000_complete_shutdown(pdev, true, wake);
4640
4641         return retval;
4642 }
4643
4644 static int e1000_resume(struct pci_dev *pdev)
4645 {
4646         struct net_device *netdev = pci_get_drvdata(pdev);
4647         struct e1000_adapter *adapter = netdev_priv(netdev);
4648         struct e1000_hw *hw = &adapter->hw;
4649         u32 err;
4650
4651         pci_set_power_state(pdev, PCI_D0);
4652         pci_restore_state(pdev);
4653         pci_save_state(pdev);
4654         e1000e_disable_l1aspm(pdev);
4655
4656         err = pci_enable_device_mem(pdev);
4657         if (err) {
4658                 dev_err(&pdev->dev,
4659                         "Cannot enable PCI device from suspend\n");
4660                 return err;
4661         }
4662
4663         pci_set_master(pdev);
4664
4665         pci_enable_wake(pdev, PCI_D3hot, 0);
4666         pci_enable_wake(pdev, PCI_D3cold, 0);
4667
4668         e1000e_set_interrupt_capability(adapter);
4669         if (netif_running(netdev)) {
4670                 err = e1000_request_irq(adapter);
4671                 if (err)
4672                         return err;
4673         }
4674
4675         e1000e_power_up_phy(adapter);
4676
4677         /* report the system wakeup cause from S3/S4 */
4678         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4679                 u16 phy_data;
4680
4681                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
4682                 if (phy_data) {
4683                         e_info("PHY Wakeup cause - %s\n",
4684                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
4685                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
4686                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
4687                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
4688                                 phy_data & E1000_WUS_LNKC ? "Link Status "
4689                                 " Change" : "other");
4690                 }
4691                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
4692         } else {
4693                 u32 wus = er32(WUS);
4694                 if (wus) {
4695                         e_info("MAC Wakeup cause - %s\n",
4696                                 wus & E1000_WUS_EX ? "Unicast Packet" :
4697                                 wus & E1000_WUS_MC ? "Multicast Packet" :
4698                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
4699                                 wus & E1000_WUS_MAG ? "Magic Packet" :
4700                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
4701                                 "other");
4702                 }
4703                 ew32(WUS, ~0);
4704         }
4705
4706         e1000e_reset(adapter);
4707
4708         e1000_init_manageability(adapter);
4709
4710         if (netif_running(netdev))
4711                 e1000e_up(adapter);
4712
4713         netif_device_attach(netdev);
4714
4715         /*
4716          * If the controller has AMT, do not set DRV_LOAD until the interface
4717          * is up.  For all other cases, let the f/w know that the h/w is now
4718          * under the control of the driver.
4719          */
4720         if (!(adapter->flags & FLAG_HAS_AMT))
4721                 e1000_get_hw_control(adapter);
4722
4723         return 0;
4724 }
4725 #endif
4726
4727 static void e1000_shutdown(struct pci_dev *pdev)
4728 {
4729         bool wake = false;
4730
4731         __e1000_shutdown(pdev, &wake);
4732
4733         if (system_state == SYSTEM_POWER_OFF)
4734                 e1000_complete_shutdown(pdev, false, wake);
4735 }
4736
4737 #ifdef CONFIG_NET_POLL_CONTROLLER
4738 /*
4739  * Polling 'interrupt' - used by things like netconsole to send skbs
4740  * without having to re-enable interrupts. It's not called while
4741  * the interrupt routine is executing.
4742  */
4743 static void e1000_netpoll(struct net_device *netdev)
4744 {
4745         struct e1000_adapter *adapter = netdev_priv(netdev);
4746
4747         disable_irq(adapter->pdev->irq);
4748         e1000_intr(adapter->pdev->irq, netdev);
4749
4750         enable_irq(adapter->pdev->irq);
4751 }
4752 #endif
4753
4754 /**
4755  * e1000_io_error_detected - called when PCI error is detected
4756  * @pdev: Pointer to PCI device
4757  * @state: The current pci connection state
4758  *
4759  * This function is called after a PCI bus error affecting
4760  * this device has been detected.
4761  */
4762 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4763                                                 pci_channel_state_t state)
4764 {
4765         struct net_device *netdev = pci_get_drvdata(pdev);
4766         struct e1000_adapter *adapter = netdev_priv(netdev);
4767
4768         netif_device_detach(netdev);
4769
4770         if (state == pci_channel_io_perm_failure)
4771                 return PCI_ERS_RESULT_DISCONNECT;
4772
4773         if (netif_running(netdev))
4774                 e1000e_down(adapter);
4775         pci_disable_device(pdev);
4776
4777         /* Request a slot slot reset. */
4778         return PCI_ERS_RESULT_NEED_RESET;
4779 }
4780
4781 /**
4782  * e1000_io_slot_reset - called after the pci bus has been reset.
4783  * @pdev: Pointer to PCI device
4784  *
4785  * Restart the card from scratch, as if from a cold-boot. Implementation
4786  * resembles the first-half of the e1000_resume routine.
4787  */
4788 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4789 {
4790         struct net_device *netdev = pci_get_drvdata(pdev);
4791         struct e1000_adapter *adapter = netdev_priv(netdev);
4792         struct e1000_hw *hw = &adapter->hw;
4793         int err;
4794         pci_ers_result_t result;
4795
4796         e1000e_disable_l1aspm(pdev);
4797         err = pci_enable_device_mem(pdev);
4798         if (err) {
4799                 dev_err(&pdev->dev,
4800                         "Cannot re-enable PCI device after reset.\n");
4801                 result = PCI_ERS_RESULT_DISCONNECT;
4802         } else {
4803                 pci_set_master(pdev);
4804                 pci_restore_state(pdev);
4805                 pci_save_state(pdev);
4806
4807                 pci_enable_wake(pdev, PCI_D3hot, 0);
4808                 pci_enable_wake(pdev, PCI_D3cold, 0);
4809
4810                 e1000e_reset(adapter);
4811                 ew32(WUS, ~0);
4812                 result = PCI_ERS_RESULT_RECOVERED;
4813         }
4814
4815         pci_cleanup_aer_uncorrect_error_status(pdev);
4816
4817         return result;
4818 }
4819
4820 /**
4821  * e1000_io_resume - called when traffic can start flowing again.
4822  * @pdev: Pointer to PCI device
4823  *
4824  * This callback is called when the error recovery driver tells us that
4825  * its OK to resume normal operation. Implementation resembles the
4826  * second-half of the e1000_resume routine.
4827  */
4828 static void e1000_io_resume(struct pci_dev *pdev)
4829 {
4830         struct net_device *netdev = pci_get_drvdata(pdev);
4831         struct e1000_adapter *adapter = netdev_priv(netdev);
4832
4833         e1000_init_manageability(adapter);
4834
4835         if (netif_running(netdev)) {
4836                 if (e1000e_up(adapter)) {
4837                         dev_err(&pdev->dev,
4838                                 "can't bring device back up after reset\n");
4839                         return;
4840                 }
4841         }
4842
4843         netif_device_attach(netdev);
4844
4845         /*
4846          * If the controller has AMT, do not set DRV_LOAD until the interface
4847          * is up.  For all other cases, let the f/w know that the h/w is now
4848          * under the control of the driver.
4849          */
4850         if (!(adapter->flags & FLAG_HAS_AMT))
4851                 e1000_get_hw_control(adapter);
4852
4853 }
4854
4855 static void e1000_print_device_info(struct e1000_adapter *adapter)
4856 {
4857         struct e1000_hw *hw = &adapter->hw;
4858         struct net_device *netdev = adapter->netdev;
4859         u32 pba_num;
4860
4861         /* print bus type/speed/width info */
4862         e_info("(PCI Express:2.5GB/s:%s) %pM\n",
4863                /* bus width */
4864                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4865                 "Width x1"),
4866                /* MAC address */
4867                netdev->dev_addr);
4868         e_info("Intel(R) PRO/%s Network Connection\n",
4869                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
4870         e1000e_read_pba_num(hw, &pba_num);
4871         e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4872                hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
4873 }
4874
4875 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4876 {
4877         struct e1000_hw *hw = &adapter->hw;
4878         int ret_val;
4879         u16 buf = 0;
4880
4881         if (hw->mac.type != e1000_82573)
4882                 return;
4883
4884         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
4885         if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
4886                 /* Deep Smart Power Down (DSPD) */
4887                 dev_warn(&adapter->pdev->dev,
4888                          "Warning: detected DSPD enabled in EEPROM\n");
4889         }
4890
4891         ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
4892         if (!ret_val && (le16_to_cpu(buf) & (3 << 2))) {
4893                 /* ASPM enable */
4894                 dev_warn(&adapter->pdev->dev,
4895                          "Warning: detected ASPM enabled in EEPROM\n");
4896         }
4897 }
4898
4899 static const struct net_device_ops e1000e_netdev_ops = {
4900         .ndo_open               = e1000_open,
4901         .ndo_stop               = e1000_close,
4902         .ndo_start_xmit         = e1000_xmit_frame,
4903         .ndo_get_stats          = e1000_get_stats,
4904         .ndo_set_multicast_list = e1000_set_multi,
4905         .ndo_set_mac_address    = e1000_set_mac,
4906         .ndo_change_mtu         = e1000_change_mtu,
4907         .ndo_do_ioctl           = e1000_ioctl,
4908         .ndo_tx_timeout         = e1000_tx_timeout,
4909         .ndo_validate_addr      = eth_validate_addr,
4910
4911         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
4912         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
4913         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
4914 #ifdef CONFIG_NET_POLL_CONTROLLER
4915         .ndo_poll_controller    = e1000_netpoll,
4916 #endif
4917 };
4918
4919 /**
4920  * e1000_probe - Device Initialization Routine
4921  * @pdev: PCI device information struct
4922  * @ent: entry in e1000_pci_tbl
4923  *
4924  * Returns 0 on success, negative on failure
4925  *
4926  * e1000_probe initializes an adapter identified by a pci_dev structure.
4927  * The OS initialization, configuring of the adapter private structure,
4928  * and a hardware reset occur.
4929  **/
4930 static int __devinit e1000_probe(struct pci_dev *pdev,
4931                                  const struct pci_device_id *ent)
4932 {
4933         struct net_device *netdev;
4934         struct e1000_adapter *adapter;
4935         struct e1000_hw *hw;
4936         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
4937         resource_size_t mmio_start, mmio_len;
4938         resource_size_t flash_start, flash_len;
4939
4940         static int cards_found;
4941         int i, err, pci_using_dac;
4942         u16 eeprom_data = 0;
4943         u16 eeprom_apme_mask = E1000_EEPROM_APME;
4944
4945         e1000e_disable_l1aspm(pdev);
4946
4947         err = pci_enable_device_mem(pdev);
4948         if (err)
4949                 return err;
4950
4951         pci_using_dac = 0;
4952         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4953         if (!err) {
4954                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4955                 if (!err)
4956                         pci_using_dac = 1;
4957         } else {
4958                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4959                 if (err) {
4960                         err = pci_set_consistent_dma_mask(pdev,
4961                                                           DMA_BIT_MASK(32));
4962                         if (err) {
4963                                 dev_err(&pdev->dev, "No usable DMA "
4964                                         "configuration, aborting\n");
4965                                 goto err_dma;
4966                         }
4967                 }
4968         }
4969
4970         err = pci_request_selected_regions_exclusive(pdev,
4971                                           pci_select_bars(pdev, IORESOURCE_MEM),
4972                                           e1000e_driver_name);
4973         if (err)
4974                 goto err_pci_reg;
4975
4976         /* AER (Advanced Error Reporting) hooks */
4977         pci_enable_pcie_error_reporting(pdev);
4978
4979         pci_set_master(pdev);
4980         /* PCI config space info */
4981         err = pci_save_state(pdev);
4982         if (err)
4983                 goto err_alloc_etherdev;
4984
4985         err = -ENOMEM;
4986         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
4987         if (!netdev)
4988                 goto err_alloc_etherdev;
4989
4990         SET_NETDEV_DEV(netdev, &pdev->dev);
4991
4992         pci_set_drvdata(pdev, netdev);
4993         adapter = netdev_priv(netdev);
4994         hw = &adapter->hw;
4995         adapter->netdev = netdev;
4996         adapter->pdev = pdev;
4997         adapter->ei = ei;
4998         adapter->pba = ei->pba;
4999         adapter->flags = ei->flags;
5000         adapter->flags2 = ei->flags2;
5001         adapter->hw.adapter = adapter;
5002         adapter->hw.mac.type = ei->mac;
5003         adapter->max_hw_frame_size = ei->max_hw_frame_size;
5004         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
5005
5006         mmio_start = pci_resource_start(pdev, 0);
5007         mmio_len = pci_resource_len(pdev, 0);
5008
5009         err = -EIO;
5010         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
5011         if (!adapter->hw.hw_addr)
5012                 goto err_ioremap;
5013
5014         if ((adapter->flags & FLAG_HAS_FLASH) &&
5015             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
5016                 flash_start = pci_resource_start(pdev, 1);
5017                 flash_len = pci_resource_len(pdev, 1);
5018                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
5019                 if (!adapter->hw.flash_address)
5020                         goto err_flashmap;
5021         }
5022
5023         /* construct the net_device struct */
5024         netdev->netdev_ops              = &e1000e_netdev_ops;
5025         e1000e_set_ethtool_ops(netdev);
5026         netdev->watchdog_timeo          = 5 * HZ;
5027         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
5028         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
5029
5030         netdev->mem_start = mmio_start;
5031         netdev->mem_end = mmio_start + mmio_len;
5032
5033         adapter->bd_number = cards_found++;
5034
5035         e1000e_check_options(adapter);
5036
5037         /* setup adapter struct */
5038         err = e1000_sw_init(adapter);
5039         if (err)
5040                 goto err_sw_init;
5041
5042         err = -EIO;
5043
5044         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
5045         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
5046         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
5047
5048         err = ei->get_variants(adapter);
5049         if (err)
5050                 goto err_hw_init;
5051
5052         if ((adapter->flags & FLAG_IS_ICH) &&
5053             (adapter->flags & FLAG_READ_ONLY_NVM))
5054                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
5055
5056         hw->mac.ops.get_bus_info(&adapter->hw);
5057
5058         adapter->hw.phy.autoneg_wait_to_complete = 0;
5059
5060         /* Copper options */
5061         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
5062                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
5063                 adapter->hw.phy.disable_polarity_correction = 0;
5064                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
5065         }
5066
5067         if (e1000_check_reset_block(&adapter->hw))
5068                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5069
5070         netdev->features = NETIF_F_SG |
5071                            NETIF_F_HW_CSUM |
5072                            NETIF_F_HW_VLAN_TX |
5073                            NETIF_F_HW_VLAN_RX;
5074
5075         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
5076                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
5077
5078         netdev->features |= NETIF_F_TSO;
5079         netdev->features |= NETIF_F_TSO6;
5080
5081         netdev->vlan_features |= NETIF_F_TSO;
5082         netdev->vlan_features |= NETIF_F_TSO6;
5083         netdev->vlan_features |= NETIF_F_HW_CSUM;
5084         netdev->vlan_features |= NETIF_F_SG;
5085
5086         if (pci_using_dac)
5087                 netdev->features |= NETIF_F_HIGHDMA;
5088
5089         if (e1000e_enable_mng_pass_thru(&adapter->hw))
5090                 adapter->flags |= FLAG_MNG_PT_ENABLED;
5091
5092         /*
5093          * before reading the NVM, reset the controller to
5094          * put the device in a known good starting state
5095          */
5096         adapter->hw.mac.ops.reset_hw(&adapter->hw);
5097
5098         /*
5099          * systems with ASPM and others may see the checksum fail on the first
5100          * attempt. Let's give it a few tries
5101          */
5102         for (i = 0;; i++) {
5103                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
5104                         break;
5105                 if (i == 2) {
5106                         e_err("The NVM Checksum Is Not Valid\n");
5107                         err = -EIO;
5108                         goto err_eeprom;
5109                 }
5110         }
5111
5112         e1000_eeprom_checks(adapter);
5113
5114         /* copy the MAC address */
5115         if (e1000e_read_mac_addr(&adapter->hw))
5116                 e_err("NVM Read Error while reading MAC address\n");
5117
5118         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
5119         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
5120
5121         if (!is_valid_ether_addr(netdev->perm_addr)) {
5122                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
5123                 err = -EIO;
5124                 goto err_eeprom;
5125         }
5126
5127         init_timer(&adapter->watchdog_timer);
5128         adapter->watchdog_timer.function = &e1000_watchdog;
5129         adapter->watchdog_timer.data = (unsigned long) adapter;
5130
5131         init_timer(&adapter->phy_info_timer);
5132         adapter->phy_info_timer.function = &e1000_update_phy_info;
5133         adapter->phy_info_timer.data = (unsigned long) adapter;
5134
5135         INIT_WORK(&adapter->reset_task, e1000_reset_task);
5136         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
5137         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
5138         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
5139         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
5140
5141         /* Initialize link parameters. User can change them with ethtool */
5142         adapter->hw.mac.autoneg = 1;
5143         adapter->fc_autoneg = 1;
5144         adapter->hw.fc.requested_mode = e1000_fc_default;
5145         adapter->hw.fc.current_mode = e1000_fc_default;
5146         adapter->hw.phy.autoneg_advertised = 0x2f;
5147
5148         /* ring size defaults */
5149         adapter->rx_ring->count = 256;
5150         adapter->tx_ring->count = 256;
5151
5152         /*
5153          * Initial Wake on LAN setting - If APM wake is enabled in
5154          * the EEPROM, enable the ACPI Magic Packet filter
5155          */
5156         if (adapter->flags & FLAG_APME_IN_WUC) {
5157                 /* APME bit in EEPROM is mapped to WUC.APME */
5158                 eeprom_data = er32(WUC);
5159                 eeprom_apme_mask = E1000_WUC_APME;
5160                 if (eeprom_data & E1000_WUC_PHY_WAKE)
5161                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
5162         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
5163                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
5164                     (adapter->hw.bus.func == 1))
5165                         e1000_read_nvm(&adapter->hw,
5166                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
5167                 else
5168                         e1000_read_nvm(&adapter->hw,
5169                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
5170         }
5171
5172         /* fetch WoL from EEPROM */
5173         if (eeprom_data & eeprom_apme_mask)
5174                 adapter->eeprom_wol |= E1000_WUFC_MAG;
5175
5176         /*
5177          * now that we have the eeprom settings, apply the special cases
5178          * where the eeprom may be wrong or the board simply won't support
5179          * wake on lan on a particular port
5180          */
5181         if (!(adapter->flags & FLAG_HAS_WOL))
5182                 adapter->eeprom_wol = 0;
5183
5184         /* initialize the wol settings based on the eeprom settings */
5185         adapter->wol = adapter->eeprom_wol;
5186         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5187
5188         /* save off EEPROM version number */
5189         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
5190
5191         /* reset the hardware with the new settings */
5192         e1000e_reset(adapter);
5193
5194         /*
5195          * If the controller has AMT, do not set DRV_LOAD until the interface
5196          * is up.  For all other cases, let the f/w know that the h/w is now
5197          * under the control of the driver.
5198          */
5199         if (!(adapter->flags & FLAG_HAS_AMT))
5200                 e1000_get_hw_control(adapter);
5201
5202         strcpy(netdev->name, "eth%d");
5203         err = register_netdev(netdev);
5204         if (err)
5205                 goto err_register;
5206
5207         /* carrier off reporting is important to ethtool even BEFORE open */
5208         netif_carrier_off(netdev);
5209
5210         e1000_print_device_info(adapter);
5211
5212         return 0;
5213
5214 err_register:
5215         if (!(adapter->flags & FLAG_HAS_AMT))
5216                 e1000_release_hw_control(adapter);
5217 err_eeprom:
5218         if (!e1000_check_reset_block(&adapter->hw))
5219                 e1000_phy_hw_reset(&adapter->hw);
5220 err_hw_init:
5221
5222         kfree(adapter->tx_ring);
5223         kfree(adapter->rx_ring);
5224 err_sw_init:
5225         if (adapter->hw.flash_address)
5226                 iounmap(adapter->hw.flash_address);
5227         e1000e_reset_interrupt_capability(adapter);
5228 err_flashmap:
5229         iounmap(adapter->hw.hw_addr);
5230 err_ioremap:
5231         free_netdev(netdev);
5232 err_alloc_etherdev:
5233         pci_release_selected_regions(pdev,
5234                                      pci_select_bars(pdev, IORESOURCE_MEM));
5235 err_pci_reg:
5236 err_dma:
5237         pci_disable_device(pdev);
5238         return err;
5239 }
5240
5241 /**
5242  * e1000_remove - Device Removal Routine
5243  * @pdev: PCI device information struct
5244  *
5245  * e1000_remove is called by the PCI subsystem to alert the driver
5246  * that it should release a PCI device.  The could be caused by a
5247  * Hot-Plug event, or because the driver is going to be removed from
5248  * memory.
5249  **/
5250 static void __devexit e1000_remove(struct pci_dev *pdev)
5251 {
5252         struct net_device *netdev = pci_get_drvdata(pdev);
5253         struct e1000_adapter *adapter = netdev_priv(netdev);
5254
5255         /*
5256          * flush_scheduled work may reschedule our watchdog task, so
5257          * explicitly disable watchdog tasks from being rescheduled
5258          */
5259         set_bit(__E1000_DOWN, &adapter->state);
5260         del_timer_sync(&adapter->watchdog_timer);
5261         del_timer_sync(&adapter->phy_info_timer);
5262
5263         cancel_work_sync(&adapter->reset_task);
5264         cancel_work_sync(&adapter->watchdog_task);
5265         cancel_work_sync(&adapter->downshift_task);
5266         cancel_work_sync(&adapter->update_phy_task);
5267         cancel_work_sync(&adapter->print_hang_task);
5268         flush_scheduled_work();
5269
5270         if (!(netdev->flags & IFF_UP))
5271                 e1000_power_down_phy(adapter);
5272
5273         unregister_netdev(netdev);
5274
5275         /*
5276          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5277          * would have already happened in close and is redundant.
5278          */
5279         e1000_release_hw_control(adapter);
5280
5281         e1000e_reset_interrupt_capability(adapter);
5282         kfree(adapter->tx_ring);
5283         kfree(adapter->rx_ring);
5284
5285         iounmap(adapter->hw.hw_addr);
5286         if (adapter->hw.flash_address)
5287                 iounmap(adapter->hw.flash_address);
5288         pci_release_selected_regions(pdev,
5289                                      pci_select_bars(pdev, IORESOURCE_MEM));
5290
5291         free_netdev(netdev);
5292
5293         /* AER disable */
5294         pci_disable_pcie_error_reporting(pdev);
5295
5296         pci_disable_device(pdev);
5297 }
5298
5299 /* PCI Error Recovery (ERS) */
5300 static struct pci_error_handlers e1000_err_handler = {
5301         .error_detected = e1000_io_error_detected,
5302         .slot_reset = e1000_io_slot_reset,
5303         .resume = e1000_io_resume,
5304 };
5305
5306 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
5307         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5308         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5309         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5310         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5311         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5312         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
5313         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5314         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5315         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
5316
5317         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5318         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5319         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5320         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
5321
5322         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5323         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5324         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
5325
5326         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
5327         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
5328         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
5329
5330         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5331           board_80003es2lan },
5332         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5333           board_80003es2lan },
5334         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5335           board_80003es2lan },
5336         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5337           board_80003es2lan },
5338
5339         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5340         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5341         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5342         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5343         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5344         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5345         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
5346         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
5347
5348         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5349         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5350         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5351         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5352         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
5353         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
5354         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5355         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5356         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5357
5358         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5359         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5360         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
5361
5362         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5363         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5364
5365         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
5366         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
5367         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
5368         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
5369
5370         { }     /* terminate list */
5371 };
5372 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5373
5374 /* PCI Device API Driver */
5375 static struct pci_driver e1000_driver = {
5376         .name     = e1000e_driver_name,
5377         .id_table = e1000_pci_tbl,
5378         .probe    = e1000_probe,
5379         .remove   = __devexit_p(e1000_remove),
5380 #ifdef CONFIG_PM
5381         /* Power Management Hooks */
5382         .suspend  = e1000_suspend,
5383         .resume   = e1000_resume,
5384 #endif
5385         .shutdown = e1000_shutdown,
5386         .err_handler = &e1000_err_handler
5387 };
5388
5389 /**
5390  * e1000_init_module - Driver Registration Routine
5391  *
5392  * e1000_init_module is the first routine called when the driver is
5393  * loaded. All it does is register with the PCI subsystem.
5394  **/
5395 static int __init e1000_init_module(void)
5396 {
5397         int ret;
5398         printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
5399                e1000e_driver_name, e1000e_driver_version);
5400         printk(KERN_INFO "%s: Copyright (c) 1999 - 2009 Intel Corporation.\n",
5401                e1000e_driver_name);
5402         ret = pci_register_driver(&e1000_driver);
5403
5404         return ret;
5405 }
5406 module_init(e1000_init_module);
5407
5408 /**
5409  * e1000_exit_module - Driver Exit Cleanup Routine
5410  *
5411  * e1000_exit_module is called just before the driver is removed
5412  * from memory.
5413  **/
5414 static void __exit e1000_exit_module(void)
5415 {
5416         pci_unregister_driver(&e1000_driver);
5417 }
5418 module_exit(e1000_exit_module);
5419
5420
5421 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5422 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5423 MODULE_LICENSE("GPL");
5424 MODULE_VERSION(DRV_VERSION);
5425
5426 /* e1000_main.c */