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 <net/checksum.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/mii.h>
  42 #include <linux/ethtool.h>
  43 #include <linux/if_vlan.h>
  44 #include <linux/cpu.h>
  45 #include <linux/smp.h>
  46 #include <linux/pm_qos_params.h>
  47 #include <linux/aer.h>
  48
  49 #include "e1000.h"
  50
  51 #define DRV_VERSION "1.0.2-k2"
  52 char e1000e_driver_name[] = "e1000e";
  53 const char e1000e_driver_version[] = DRV_VERSION;
  54
  55 static const struct e1000_info *e1000_info_tbl[] = {
  56         [board_82571]           = &e1000_82571_info,
  57         [board_82572]           = &e1000_82572_info,
  58         [board_82573]           = &e1000_82573_info,
  59         [board_82574]           = &e1000_82574_info,
  60         [board_82583]           = &e1000_82583_info,
  61         [board_80003es2lan]     = &e1000_es2_info,
  62         [board_ich8lan]         = &e1000_ich8_info,
  63         [board_ich9lan]         = &e1000_ich9_info,
  64         [board_ich10lan]        = &e1000_ich10_info,
  65         [board_pchlan]          = &e1000_pch_info,
  66 };
  67
  68 /**
  69  * e1000_desc_unused - calculate if we have unused descriptors
  70  **/
  71 static int e1000_desc_unused(struct e1000_ring *ring)
  72 {
  73         if (ring->next_to_clean > ring->next_to_use)
  74                 return ring->next_to_clean - ring->next_to_use - 1;
  75
  76         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  77 }
  78
  79 /**
  80  * e1000_receive_skb - helper function to handle Rx indications
  81  * @adapter: board private structure
  82  * @status: descriptor status field as written by hardware
  83  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  84  * @skb: pointer to sk_buff to be indicated to stack
  85  **/
  86 static void e1000_receive_skb(struct e1000_adapter *adapter,
  87                               struct net_device *netdev,
  88                               struct sk_buff *skb,
  89                               u8 status, __le16 vlan)
  90 {
  91         skb->protocol = eth_type_trans(skb, netdev);
  92
  93         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
  94                 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
  95                                  le16_to_cpu(vlan), skb);
  96         else
  97                 napi_gro_receive(&adapter->napi, skb);
  98 }
  99
 100 /**
 101  * e1000_rx_checksum - Receive Checksum Offload for 82543
 102  * @adapter:     board private structure
 103  * @status_err:  receive descriptor status and error fields
 104  * @csum:       receive descriptor csum field
 105  * @sk_buff:     socket buffer with received data
 106  **/
 107 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 108                               u32 csum, struct sk_buff *skb)
 109 {
 110         u16 status = (u16)status_err;
 111         u8 errors = (u8)(status_err >> 24);
 112         skb->ip_summed = CHECKSUM_NONE;
 113
 114         /* Ignore Checksum bit is set */
 115         if (status & E1000_RXD_STAT_IXSM)
 116                 return;
 117         /* TCP/UDP checksum error bit is set */
 118         if (errors & E1000_RXD_ERR_TCPE) {
 119                 /* let the stack verify checksum errors */
 120                 adapter->hw_csum_err++;
 121                 return;
 122         }
 123
 124         /* TCP/UDP Checksum has not been calculated */
 125         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 126                 return;
 127
 128         /* It must be a TCP or UDP packet with a valid checksum */
 129         if (status & E1000_RXD_STAT_TCPCS) {
 130                 /* TCP checksum is good */
 131                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 132         } else {
 133                 /*
 134                  * IP fragment with UDP payload
 135                  * Hardware complements the payload checksum, so we undo it
 136                  * and then put the value in host order for further stack use.
 137                  */
 138                 __sum16 sum = (__force __sum16)htons(csum);
 139                 skb->csum = csum_unfold(~sum);
 140                 skb->ip_summed = CHECKSUM_COMPLETE;
 141         }
 142         adapter->hw_csum_good++;
 143 }
 144
 145 /**
 146  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 147  * @adapter: address of board private structure
 148  **/
 149 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 150                                    int cleaned_count)
 151 {
 152         struct net_device *netdev = adapter->netdev;
 153         struct pci_dev *pdev = adapter->pdev;
 154         struct e1000_ring *rx_ring = adapter->rx_ring;
 155         struct e1000_rx_desc *rx_desc;
 156         struct e1000_buffer *buffer_info;
 157         struct sk_buff *skb;
 158         unsigned int i;
 159         unsigned int bufsz = adapter->rx_buffer_len;
 160
 161         i = rx_ring->next_to_use;
 162         buffer_info = &rx_ring->buffer_info[i];
 163
 164         while (cleaned_count--) {
 165                 skb = buffer_info->skb;
 166                 if (skb) {
 167                         skb_trim(skb, 0);
 168                         goto map_skb;
 169                 }
 170
 171                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 172                 if (!skb) {
 173                         /* Better luck next round */
 174                         adapter->alloc_rx_buff_failed++;
 175                         break;
 176                 }
 177
 178                 buffer_info->skb = skb;
 179 map_skb:
 180                 buffer_info->dma = pci_map_single(pdev, skb->data,
 181                                                   adapter->rx_buffer_len,
 182                                                   PCI_DMA_FROMDEVICE);
 183                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 184                         dev_err(&pdev->dev, "RX DMA map failed\n");
 185                         adapter->rx_dma_failed++;
 186                         break;
 187                 }
 188
 189                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 190                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 191
 192                 i++;
 193                 if (i == rx_ring->count)
 194                         i = 0;
 195                 buffer_info = &rx_ring->buffer_info[i];
 196         }
 197
 198         if (rx_ring->next_to_use != i) {
 199                 rx_ring->next_to_use = i;
 200                 if (i-- == 0)
 201                         i = (rx_ring->count - 1);
 202
 203                 /*
 204                  * Force memory writes to complete before letting h/w
 205                  * know there are new descriptors to fetch.  (Only
 206                  * applicable for weak-ordered memory model archs,
 207                  * such as IA-64).
 208                  */
 209                 wmb();
 210                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 211         }
 212 }
 213
 214 /**
 215  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 216  * @adapter: address of board private structure
 217  **/
 218 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 219                                       int cleaned_count)
 220 {
 221         struct net_device *netdev = adapter->netdev;
 222         struct pci_dev *pdev = adapter->pdev;
 223         union e1000_rx_desc_packet_split *rx_desc;
 224         struct e1000_ring *rx_ring = adapter->rx_ring;
 225         struct e1000_buffer *buffer_info;
 226         struct e1000_ps_page *ps_page;
 227         struct sk_buff *skb;
 228         unsigned int i, j;
 229
 230         i = rx_ring->next_to_use;
 231         buffer_info = &rx_ring->buffer_info[i];
 232
 233         while (cleaned_count--) {
 234                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 235
 236                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 237                         ps_page = &buffer_info->ps_pages[j];
 238                         if (j >= adapter->rx_ps_pages) {
 239                                 /* all unused desc entries get hw null ptr */
 240                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 241                                 continue;
 242                         }
 243                         if (!ps_page->page) {
 244                                 ps_page->page = alloc_page(GFP_ATOMIC);
 245                                 if (!ps_page->page) {
 246                                         adapter->alloc_rx_buff_failed++;
 247                                         goto no_buffers;
 248                                 }
 249                                 ps_page->dma = pci_map_page(pdev,
 250                                                    ps_page->page,
 251                                                    0, PAGE_SIZE,
 252                                                    PCI_DMA_FROMDEVICE);
 253                                 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
 254                                         dev_err(&adapter->pdev->dev,
 255                                           "RX DMA page map failed\n");
 256                                         adapter->rx_dma_failed++;
 257                                         goto no_buffers;
 258                                 }
 259                         }
 260                         /*
 261                          * Refresh the desc even if buffer_addrs
 262                          * didn't change because each write-back
 263                          * erases this info.
 264                          */
 265                         rx_desc->read.buffer_addr[j+1] =
 266                              cpu_to_le64(ps_page->dma);
 267                 }
 268
 269                 skb = netdev_alloc_skb_ip_align(netdev,
 270                                                 adapter->rx_ps_bsize0);
 271
 272                 if (!skb) {
 273                         adapter->alloc_rx_buff_failed++;
 274                         break;
 275                 }
 276
 277                 buffer_info->skb = skb;
 278                 buffer_info->dma = pci_map_single(pdev, skb->data,
 279                                                   adapter->rx_ps_bsize0,
 280                                                   PCI_DMA_FROMDEVICE);
 281                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 282                         dev_err(&pdev->dev, "RX DMA map failed\n");
 283                         adapter->rx_dma_failed++;
 284                         /* cleanup skb */
 285                         dev_kfree_skb_any(skb);
 286                         buffer_info->skb = NULL;
 287                         break;
 288                 }
 289
 290                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 291
 292                 i++;
 293                 if (i == rx_ring->count)
 294                         i = 0;
 295                 buffer_info = &rx_ring->buffer_info[i];
 296         }
 297
 298 no_buffers:
 299         if (rx_ring->next_to_use != i) {
 300                 rx_ring->next_to_use = i;
 301
 302                 if (!(i--))
 303                         i = (rx_ring->count - 1);
 304
 305                 /*
 306                  * Force memory writes to complete before letting h/w
 307                  * know there are new descriptors to fetch.  (Only
 308                  * applicable for weak-ordered memory model archs,
 309                  * such as IA-64).
 310                  */
 311                 wmb();
 312                 /*
 313                  * Hardware increments by 16 bytes, but packet split
 314                  * descriptors are 32 bytes...so we increment tail
 315                  * twice as much.
 316                  */
 317                 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 318         }
 319 }
 320
 321 /**
 322  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 323  * @adapter: address of board private structure
 324  * @cleaned_count: number of buffers to allocate this pass
 325  **/
 326
 327 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 328                                          int cleaned_count)
 329 {
 330         struct net_device *netdev = adapter->netdev;
 331         struct pci_dev *pdev = adapter->pdev;
 332         struct e1000_rx_desc *rx_desc;
 333         struct e1000_ring *rx_ring = adapter->rx_ring;
 334         struct e1000_buffer *buffer_info;
 335         struct sk_buff *skb;
 336         unsigned int i;
 337         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 338
 339         i = rx_ring->next_to_use;
 340         buffer_info = &rx_ring->buffer_info[i];
 341
 342         while (cleaned_count--) {
 343                 skb = buffer_info->skb;
 344                 if (skb) {
 345                         skb_trim(skb, 0);
 346                         goto check_page;
 347                 }
 348
 349                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 350                 if (unlikely(!skb)) {
 351                         /* Better luck next round */
 352                         adapter->alloc_rx_buff_failed++;
 353                         break;
 354                 }
 355
 356                 buffer_info->skb = skb;
 357 check_page:
 358                 /* allocate a new page if necessary */
 359                 if (!buffer_info->page) {
 360                         buffer_info->page = alloc_page(GFP_ATOMIC);
 361                         if (unlikely(!buffer_info->page)) {
 362                                 adapter->alloc_rx_buff_failed++;
 363                                 break;
 364                         }
 365                 }
 366
 367                 if (!buffer_info->dma)
 368                         buffer_info->dma = pci_map_page(pdev,
 369                                                         buffer_info->page, 0,
 370                                                         PAGE_SIZE,
 371                                                         PCI_DMA_FROMDEVICE);
 372
 373                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 374                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 375
 376                 if (unlikely(++i == rx_ring->count))
 377                         i = 0;
 378                 buffer_info = &rx_ring->buffer_info[i];
 379         }
 380
 381         if (likely(rx_ring->next_to_use != i)) {
 382                 rx_ring->next_to_use = i;
 383                 if (unlikely(i-- == 0))
 384                         i = (rx_ring->count - 1);
 385
 386                 /* Force memory writes to complete before letting h/w
 387                  * know there are new descriptors to fetch.  (Only
 388                  * applicable for weak-ordered memory model archs,
 389                  * such as IA-64). */
 390                 wmb();
 391                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 392         }
 393 }
 394
 395 /**
 396  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 397  * @adapter: board private structure
 398  *
 399  * the return value indicates whether actual cleaning was done, there
 400  * is no guarantee that everything was cleaned
 401  **/
 402 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 403                                int *work_done, int work_to_do)
 404 {
 405         struct net_device *netdev = adapter->netdev;
 406         struct pci_dev *pdev = adapter->pdev;
 407         struct e1000_hw *hw = &adapter->hw;
 408         struct e1000_ring *rx_ring = adapter->rx_ring;
 409         struct e1000_rx_desc *rx_desc, *next_rxd;
 410         struct e1000_buffer *buffer_info, *next_buffer;
 411         u32 length;
 412         unsigned int i;
 413         int cleaned_count = 0;
 414         bool cleaned = 0;
 415         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 416
 417         i = rx_ring->next_to_clean;
 418         rx_desc = E1000_RX_DESC(*rx_ring, i);
 419         buffer_info = &rx_ring->buffer_info[i];
 420
 421         while (rx_desc->status & E1000_RXD_STAT_DD) {
 422                 struct sk_buff *skb;
 423                 u8 status;
 424
 425                 if (*work_done >= work_to_do)
 426                         break;
 427                 (*work_done)++;
 428
 429                 status = rx_desc->status;
 430                 skb = buffer_info->skb;
 431                 buffer_info->skb = NULL;
 432
 433                 prefetch(skb->data - NET_IP_ALIGN);
 434
 435                 i++;
 436                 if (i == rx_ring->count)
 437                         i = 0;
 438                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 439                 prefetch(next_rxd);
 440
 441                 next_buffer = &rx_ring->buffer_info[i];
 442
 443                 cleaned = 1;
 444                 cleaned_count++;
 445                 pci_unmap_single(pdev,
 446                                  buffer_info->dma,
 447                                  adapter->rx_buffer_len,
 448                                  PCI_DMA_FROMDEVICE);
 449                 buffer_info->dma = 0;
 450
 451                 length = le16_to_cpu(rx_desc->length);
 452
 453                 /* !EOP means multiple descriptors were used to store a single
 454                  * packet, also make sure the frame isn't just CRC only */
 455                 if (!(status & E1000_RXD_STAT_EOP) || (length <= 4)) {
 456                         /* All receives must fit into a single buffer */
 457                         e_dbg("Receive packet consumed multiple buffers\n");
 458                         /* recycle */
 459                         buffer_info->skb = skb;
 460                         goto next_desc;
 461                 }
 462
 463                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 464                         /* recycle */
 465                         buffer_info->skb = skb;
 466                         goto next_desc;
 467                 }
 468
 469                 /* adjust length to remove Ethernet CRC */
 470                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 471                         length -= 4;
 472
 473                 total_rx_bytes += length;
 474                 total_rx_packets++;
 475
 476                 /*
 477                  * code added for copybreak, this should improve
 478                  * performance for small packets with large amounts
 479                  * of reassembly being done in the stack
 480                  */
 481                 if (length < copybreak) {
 482                         struct sk_buff *new_skb =
 483                             netdev_alloc_skb_ip_align(netdev, length);
 484                         if (new_skb) {
 485                                 skb_copy_to_linear_data_offset(new_skb,
 486                                                                -NET_IP_ALIGN,
 487                                                                (skb->data -
 488                                                                 NET_IP_ALIGN),
 489                                                                (length +
 490                                                                 NET_IP_ALIGN));
 491                                 /* save the skb in buffer_info as good */
 492                                 buffer_info->skb = skb;
 493                                 skb = new_skb;
 494                         }
 495                         /* else just continue with the old one */
 496                 }
 497                 /* end copybreak code */
 498                 skb_put(skb, length);
 499
 500                 /* Receive Checksum Offload */
 501                 e1000_rx_checksum(adapter,
 502                                   (u32)(status) |
 503                                   ((u32)(rx_desc->errors) << 24),
 504                                   le16_to_cpu(rx_desc->csum), skb);
 505
 506                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 507
 508 next_desc:
 509                 rx_desc->status = 0;
 510
 511                 /* return some buffers to hardware, one at a time is too slow */
 512                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 513                         adapter->alloc_rx_buf(adapter, cleaned_count);
 514                         cleaned_count = 0;
 515                 }
 516
 517                 /* use prefetched values */
 518                 rx_desc = next_rxd;
 519                 buffer_info = next_buffer;
 520         }
 521         rx_ring->next_to_clean = i;
 522
 523         cleaned_count = e1000_desc_unused(rx_ring);
 524         if (cleaned_count)
 525                 adapter->alloc_rx_buf(adapter, cleaned_count);
 526
 527         adapter->total_rx_bytes += total_rx_bytes;
 528         adapter->total_rx_packets += total_rx_packets;
 529         netdev->stats.rx_bytes += total_rx_bytes;
 530         netdev->stats.rx_packets += total_rx_packets;
 531         return cleaned;
 532 }
 533
 534 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 535                              struct e1000_buffer *buffer_info)
 536 {
 537         buffer_info->dma = 0;
 538         if (buffer_info->skb) {
 539                 skb_dma_unmap(&adapter->pdev->dev, buffer_info->skb,
 540                               DMA_TO_DEVICE);
 541                 dev_kfree_skb_any(buffer_info->skb);
 542                 buffer_info->skb = NULL;
 543         }
 544         buffer_info->time_stamp = 0;
 545 }
 546
 547 static void e1000_print_hw_hang(struct work_struct *work)
 548 {
 549         struct e1000_adapter *adapter = container_of(work,
 550                                                      struct e1000_adapter,
 551                                                      print_hang_task);
 552         struct e1000_ring *tx_ring = adapter->tx_ring;
 553         unsigned int i = tx_ring->next_to_clean;
 554         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 555         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 556         struct e1000_hw *hw = &adapter->hw;
 557         u16 phy_status, phy_1000t_status, phy_ext_status;
 558         u16 pci_status;
 559
 560         e1e_rphy(hw, PHY_STATUS, &phy_status);
 561         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
 562         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
 563
 564         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
 565
 566         /* detected Hardware unit hang */
 567         e_err("Detected Hardware Unit Hang:\n"
 568               "  TDH                  <%x>\n"
 569               "  TDT                  <%x>\n"
 570               "  next_to_use          <%x>\n"
 571               "  next_to_clean        <%x>\n"
 572               "buffer_info[next_to_clean]:\n"
 573               "  time_stamp           <%lx>\n"
 574               "  next_to_watch        <%x>\n"
 575               "  jiffies              <%lx>\n"
 576               "  next_to_watch.status <%x>\n"
 577               "MAC Status             <%x>\n"
 578               "PHY Status             <%x>\n"
 579               "PHY 1000BASE-T Status  <%x>\n"
 580               "PHY Extended Status    <%x>\n"
 581               "PCI Status             <%x>\n",
 582               readl(adapter->hw.hw_addr + tx_ring->head),
 583               readl(adapter->hw.hw_addr + tx_ring->tail),
 584               tx_ring->next_to_use,
 585               tx_ring->next_to_clean,
 586               tx_ring->buffer_info[eop].time_stamp,
 587               eop,
 588               jiffies,
 589               eop_desc->upper.fields.status,
 590               er32(STATUS),
 591               phy_status,
 592               phy_1000t_status,
 593               phy_ext_status,
 594               pci_status);
 595 }
 596
 597 /**
 598  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 599  * @adapter: board private structure
 600  *
 601  * the return value indicates whether actual cleaning was done, there
 602  * is no guarantee that everything was cleaned
 603  **/
 604 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 605 {
 606         struct net_device *netdev = adapter->netdev;
 607         struct e1000_hw *hw = &adapter->hw;
 608         struct e1000_ring *tx_ring = adapter->tx_ring;
 609         struct e1000_tx_desc *tx_desc, *eop_desc;
 610         struct e1000_buffer *buffer_info;
 611         unsigned int i, eop;
 612         unsigned int count = 0;
 613         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 614
 615         i = tx_ring->next_to_clean;
 616         eop = tx_ring->buffer_info[i].next_to_watch;
 617         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 618
 619         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
 620                (count < tx_ring->count)) {
 621                 bool cleaned = false;
 622                 for (; !cleaned; count++) {
 623                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 624                         buffer_info = &tx_ring->buffer_info[i];
 625                         cleaned = (i == eop);
 626
 627                         if (cleaned) {
 628                                 struct sk_buff *skb = buffer_info->skb;
 629                                 unsigned int segs, bytecount;
 630                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 631                                 /* multiply data chunks by size of headers */
 632                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 633                                             skb->len;
 634                                 total_tx_packets += segs;
 635                                 total_tx_bytes += bytecount;
 636                         }
 637
 638                         e1000_put_txbuf(adapter, buffer_info);
 639                         tx_desc->upper.data = 0;
 640
 641                         i++;
 642                         if (i == tx_ring->count)
 643                                 i = 0;
 644                 }
 645
 646                 eop = tx_ring->buffer_info[i].next_to_watch;
 647                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
 648         }
 649
 650         tx_ring->next_to_clean = i;
 651
 652 #define TX_WAKE_THRESHOLD 32
 653         if (count && netif_carrier_ok(netdev) &&
 654             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
 655                 /* Make sure that anybody stopping the queue after this
 656                  * sees the new next_to_clean.
 657                  */
 658                 smp_mb();
 659
 660                 if (netif_queue_stopped(netdev) &&
 661                     !(test_bit(__E1000_DOWN, &adapter->state))) {
 662                         netif_wake_queue(netdev);
 663                         ++adapter->restart_queue;
 664                 }
 665         }
 666
 667         if (adapter->detect_tx_hung) {
 668                 /*
 669                  * Detect a transmit hang in hardware, this serializes the
 670                  * check with the clearing of time_stamp and movement of i
 671                  */
 672                 adapter->detect_tx_hung = 0;
 673                 if (tx_ring->buffer_info[i].time_stamp &&
 674                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
 675                                + (adapter->tx_timeout_factor * HZ))
 676                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
 677                         schedule_work(&adapter->print_hang_task);
 678                         netif_stop_queue(netdev);
 679                 }
 680         }
 681         adapter->total_tx_bytes += total_tx_bytes;
 682         adapter->total_tx_packets += total_tx_packets;
 683         netdev->stats.tx_bytes += total_tx_bytes;
 684         netdev->stats.tx_packets += total_tx_packets;
 685         return (count < tx_ring->count);
 686 }
 687
 688 /**
 689  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
 690  * @adapter: board private structure
 691  *
 692  * the return value indicates whether actual cleaning was done, there
 693  * is no guarantee that everything was cleaned
 694  **/
 695 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 696                                   int *work_done, int work_to_do)
 697 {
 698         struct e1000_hw *hw = &adapter->hw;
 699         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
 700         struct net_device *netdev = adapter->netdev;
 701         struct pci_dev *pdev = adapter->pdev;
 702         struct e1000_ring *rx_ring = adapter->rx_ring;
 703         struct e1000_buffer *buffer_info, *next_buffer;
 704         struct e1000_ps_page *ps_page;
 705         struct sk_buff *skb;
 706         unsigned int i, j;
 707         u32 length, staterr;
 708         int cleaned_count = 0;
 709         bool cleaned = 0;
 710         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 711
 712         i = rx_ring->next_to_clean;
 713         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 714         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 715         buffer_info = &rx_ring->buffer_info[i];
 716
 717         while (staterr & E1000_RXD_STAT_DD) {
 718                 if (*work_done >= work_to_do)
 719                         break;
 720                 (*work_done)++;
 721                 skb = buffer_info->skb;
 722
 723                 /* in the packet split case this is header only */
 724                 prefetch(skb->data - NET_IP_ALIGN);
 725
 726                 i++;
 727                 if (i == rx_ring->count)
 728                         i = 0;
 729                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
 730                 prefetch(next_rxd);
 731
 732                 next_buffer = &rx_ring->buffer_info[i];
 733
 734                 cleaned = 1;
 735                 cleaned_count++;
 736                 pci_unmap_single(pdev, buffer_info->dma,
 737                                  adapter->rx_ps_bsize0,
 738                                  PCI_DMA_FROMDEVICE);
 739                 buffer_info->dma = 0;
 740
 741                 if (!(staterr & E1000_RXD_STAT_EOP)) {
 742                         e_dbg("Packet Split buffers didn't pick up the full "
 743                               "packet\n");
 744                         dev_kfree_skb_irq(skb);
 745                         goto next_desc;
 746                 }
 747
 748                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 749                         dev_kfree_skb_irq(skb);
 750                         goto next_desc;
 751                 }
 752
 753                 length = le16_to_cpu(rx_desc->wb.middle.length0);
 754
 755                 if (!length) {
 756                         e_dbg("Last part of the packet spanning multiple "
 757                               "descriptors\n");
 758                         dev_kfree_skb_irq(skb);
 759                         goto next_desc;
 760                 }
 761
 762                 /* Good Receive */
 763                 skb_put(skb, length);
 764
 765                 {
 766                 /*
 767                  * this looks ugly, but it seems compiler issues make it
 768                  * more efficient than reusing j
 769                  */
 770                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
 771
 772                 /*
 773                  * page alloc/put takes too long and effects small packet
 774                  * throughput, so unsplit small packets and save the alloc/put
 775                  * only valid in softirq (napi) context to call kmap_*
 776                  */
 777                 if (l1 && (l1 <= copybreak) &&
 778                     ((length + l1) <= adapter->rx_ps_bsize0)) {
 779                         u8 *vaddr;
 780
 781                         ps_page = &buffer_info->ps_pages[0];
 782
 783                         /*
 784                          * there is no documentation about how to call
 785                          * kmap_atomic, so we can't hold the mapping
 786                          * very long
 787                          */
 788                         pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
 789                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 790                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
 791                         memcpy(skb_tail_pointer(skb), vaddr, l1);
 792                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
 793                         pci_dma_sync_single_for_device(pdev, ps_page->dma,
 794                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 795
 796                         /* remove the CRC */
 797                         if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 798                                 l1 -= 4;
 799
 800                         skb_put(skb, l1);
 801                         goto copydone;
 802                 } /* if */
 803                 }
 804
 805                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 806                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
 807                         if (!length)
 808                                 break;
 809
 810                         ps_page = &buffer_info->ps_pages[j];
 811                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 812                                        PCI_DMA_FROMDEVICE);
 813                         ps_page->dma = 0;
 814                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
 815                         ps_page->page = NULL;
 816                         skb->len += length;
 817                         skb->data_len += length;
 818                         skb->truesize += length;
 819                 }
 820
 821                 /* strip the ethernet crc, problem is we're using pages now so
 822                  * this whole operation can get a little cpu intensive
 823                  */
 824                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 825                         pskb_trim(skb, skb->len - 4);
 826
 827 copydone:
 828                 total_rx_bytes += skb->len;
 829                 total_rx_packets++;
 830
 831                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
 832                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
 833
 834                 if (rx_desc->wb.upper.header_status &
 835                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
 836                         adapter->rx_hdr_split++;
 837
 838                 e1000_receive_skb(adapter, netdev, skb,
 839                                   staterr, rx_desc->wb.middle.vlan);
 840
 841 next_desc:
 842                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
 843                 buffer_info->skb = NULL;
 844
 845                 /* return some buffers to hardware, one at a time is too slow */
 846                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 847                         adapter->alloc_rx_buf(adapter, cleaned_count);
 848                         cleaned_count = 0;
 849                 }
 850
 851                 /* use prefetched values */
 852                 rx_desc = next_rxd;
 853                 buffer_info = next_buffer;
 854
 855                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 856         }
 857         rx_ring->next_to_clean = i;
 858
 859         cleaned_count = e1000_desc_unused(rx_ring);
 860         if (cleaned_count)
 861                 adapter->alloc_rx_buf(adapter, cleaned_count);
 862
 863         adapter->total_rx_bytes += total_rx_bytes;
 864         adapter->total_rx_packets += total_rx_packets;
 865         netdev->stats.rx_bytes += total_rx_bytes;
 866         netdev->stats.rx_packets += total_rx_packets;
 867         return cleaned;
 868 }
 869
 870 /**
 871  * e1000_consume_page - helper function
 872  **/
 873 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
 874                                u16 length)
 875 {
 876         bi->page = NULL;
 877         skb->len += length;
 878         skb->data_len += length;
 879         skb->truesize += length;
 880 }
 881
 882 /**
 883  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
 884  * @adapter: board private structure
 885  *
 886  * the return value indicates whether actual cleaning was done, there
 887  * is no guarantee that everything was cleaned
 888  **/
 889
 890 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
 891                                      int *work_done, int work_to_do)
 892 {
 893         struct net_device *netdev = adapter->netdev;
 894         struct pci_dev *pdev = adapter->pdev;
 895         struct e1000_ring *rx_ring = adapter->rx_ring;
 896         struct e1000_rx_desc *rx_desc, *next_rxd;
 897         struct e1000_buffer *buffer_info, *next_buffer;
 898         u32 length;
 899         unsigned int i;
 900         int cleaned_count = 0;
 901         bool cleaned = false;
 902         unsigned int total_rx_bytes=0, total_rx_packets=0;
 903
 904         i = rx_ring->next_to_clean;
 905         rx_desc = E1000_RX_DESC(*rx_ring, i);
 906         buffer_info = &rx_ring->buffer_info[i];
 907
 908         while (rx_desc->status & E1000_RXD_STAT_DD) {
 909                 struct sk_buff *skb;
 910                 u8 status;
 911
 912                 if (*work_done >= work_to_do)
 913                         break;
 914                 (*work_done)++;
 915
 916                 status = rx_desc->status;
 917                 skb = buffer_info->skb;
 918                 buffer_info->skb = NULL;
 919
 920                 ++i;
 921                 if (i == rx_ring->count)
 922                         i = 0;
 923                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 924                 prefetch(next_rxd);
 925
 926                 next_buffer = &rx_ring->buffer_info[i];
 927
 928                 cleaned = true;
 929                 cleaned_count++;
 930                 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
 931                                PCI_DMA_FROMDEVICE);
 932                 buffer_info->dma = 0;
 933
 934                 length = le16_to_cpu(rx_desc->length);
 935
 936                 /* errors is only valid for DD + EOP descriptors */
 937                 if (unlikely((status & E1000_RXD_STAT_EOP) &&
 938                     (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
 939                                 /* recycle both page and skb */
 940                                 buffer_info->skb = skb;
 941                                 /* an error means any chain goes out the window
 942                                  * too */
 943                                 if (rx_ring->rx_skb_top)
 944                                         dev_kfree_skb(rx_ring->rx_skb_top);
 945                                 rx_ring->rx_skb_top = NULL;
 946                                 goto next_desc;
 947                 }
 948
 949 #define rxtop rx_ring->rx_skb_top
 950                 if (!(status & E1000_RXD_STAT_EOP)) {
 951                         /* this descriptor is only the beginning (or middle) */
 952                         if (!rxtop) {
 953                                 /* this is the beginning of a chain */
 954                                 rxtop = skb;
 955                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
 956                                                    0, length);
 957                         } else {
 958                                 /* this is the middle of a chain */
 959                                 skb_fill_page_desc(rxtop,
 960                                     skb_shinfo(rxtop)->nr_frags,
 961                                     buffer_info->page, 0, length);
 962                                 /* re-use the skb, only consumed the page */
 963                                 buffer_info->skb = skb;
 964                         }
 965                         e1000_consume_page(buffer_info, rxtop, length);
 966                         goto next_desc;
 967                 } else {
 968                         if (rxtop) {
 969                                 /* end of the chain */
 970                                 skb_fill_page_desc(rxtop,
 971                                     skb_shinfo(rxtop)->nr_frags,
 972                                     buffer_info->page, 0, length);
 973                                 /* re-use the current skb, we only consumed the
 974                                  * page */
 975                                 buffer_info->skb = skb;
 976                                 skb = rxtop;
 977                                 rxtop = NULL;
 978                                 e1000_consume_page(buffer_info, skb, length);
 979                         } else {
 980                                 /* no chain, got EOP, this buf is the packet
 981                                  * copybreak to save the put_page/alloc_page */
 982                                 if (length <= copybreak &&
 983                                     skb_tailroom(skb) >= length) {
 984                                         u8 *vaddr;
 985                                         vaddr = kmap_atomic(buffer_info->page,
 986                                                            KM_SKB_DATA_SOFTIRQ);
 987                                         memcpy(skb_tail_pointer(skb), vaddr,
 988                                                length);
 989                                         kunmap_atomic(vaddr,
 990                                                       KM_SKB_DATA_SOFTIRQ);
 991                                         /* re-use the page, so don't erase
 992                                          * buffer_info->page */
 993                                         skb_put(skb, length);
 994                                 } else {
 995                                         skb_fill_page_desc(skb, 0,
 996                                                            buffer_info->page, 0,
 997                                                            length);
 998                                         e1000_consume_page(buffer_info, skb,
 999                                                            length);
1000                                 }
1001                         }
1002                 }
1003
1004                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1005                 e1000_rx_checksum(adapter,
1006                                   (u32)(status) |
1007                                   ((u32)(rx_desc->errors) << 24),
1008                                   le16_to_cpu(rx_desc->csum), skb);
1009
1010                 /* probably a little skewed due to removing CRC */
1011                 total_rx_bytes += skb->len;
1012                 total_rx_packets++;
1013
1014                 /* eth type trans needs skb->data to point to something */
1015                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1016                         e_err("pskb_may_pull failed.\n");
1017                         dev_kfree_skb(skb);
1018                         goto next_desc;
1019                 }
1020
1021                 e1000_receive_skb(adapter, netdev, skb, status,
1022                                   rx_desc->special);
1023
1024 next_desc:
1025                 rx_desc->status = 0;
1026
1027                 /* return some buffers to hardware, one at a time is too slow */
1028                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1029                         adapter->alloc_rx_buf(adapter, cleaned_count);
1030                         cleaned_count = 0;
1031                 }
1032
1033                 /* use prefetched values */
1034                 rx_desc = next_rxd;
1035                 buffer_info = next_buffer;
1036         }
1037         rx_ring->next_to_clean = i;
1038
1039         cleaned_count = e1000_desc_unused(rx_ring);
1040         if (cleaned_count)
1041                 adapter->alloc_rx_buf(adapter, cleaned_count);
1042
1043         adapter->total_rx_bytes += total_rx_bytes;
1044         adapter->total_rx_packets += total_rx_packets;
1045         netdev->stats.rx_bytes += total_rx_bytes;
1046         netdev->stats.rx_packets += total_rx_packets;
1047         return cleaned;
1048 }
1049
1050 /**
1051  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1052  * @adapter: board private structure
1053  **/
1054 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1055 {
1056         struct e1000_ring *rx_ring = adapter->rx_ring;
1057         struct e1000_buffer *buffer_info;
1058         struct e1000_ps_page *ps_page;
1059         struct pci_dev *pdev = adapter->pdev;
1060         unsigned int i, j;
1061
1062         /* Free all the Rx ring sk_buffs */
1063         for (i = 0; i < rx_ring->count; i++) {
1064                 buffer_info = &rx_ring->buffer_info[i];
1065                 if (buffer_info->dma) {
1066                         if (adapter->clean_rx == e1000_clean_rx_irq)
1067                                 pci_unmap_single(pdev, buffer_info->dma,
1068                                                  adapter->rx_buffer_len,
1069                                                  PCI_DMA_FROMDEVICE);
1070                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1071                                 pci_unmap_page(pdev, buffer_info->dma,
1072                                                PAGE_SIZE,
1073                                                PCI_DMA_FROMDEVICE);
1074                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1075                                 pci_unmap_single(pdev, buffer_info->dma,
1076                                                  adapter->rx_ps_bsize0,
1077                                                  PCI_DMA_FROMDEVICE);
1078                         buffer_info->dma = 0;
1079                 }
1080
1081                 if (buffer_info->page) {
1082                         put_page(buffer_info->page);
1083                         buffer_info->page = NULL;
1084                 }
1085
1086                 if (buffer_info->skb) {
1087                         dev_kfree_skb(buffer_info->skb);
1088                         buffer_info->skb = NULL;
1089                 }
1090
1091                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1092                         ps_page = &buffer_info->ps_pages[j];
1093                         if (!ps_page->page)
1094                                 break;
1095                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1096                                        PCI_DMA_FROMDEVICE);
1097                         ps_page->dma = 0;
1098                         put_page(ps_page->page);
1099                         ps_page->page = NULL;
1100                 }
1101         }
1102
1103         /* there also may be some cached data from a chained receive */
1104         if (rx_ring->rx_skb_top) {
1105                 dev_kfree_skb(rx_ring->rx_skb_top);
1106                 rx_ring->rx_skb_top = NULL;
1107         }
1108
1109         /* Zero out the descriptor ring */
1110         memset(rx_ring->desc, 0, rx_ring->size);
1111
1112         rx_ring->next_to_clean = 0;
1113         rx_ring->next_to_use = 0;
1114
1115         writel(0, adapter->hw.hw_addr + rx_ring->head);
1116         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1117 }
1118
1119 static void e1000e_downshift_workaround(struct work_struct *work)
1120 {
1121         struct e1000_adapter *adapter = container_of(work,
1122                                         struct e1000_adapter, downshift_task);
1123
1124         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1125 }
1126
1127 /**
1128  * e1000_intr_msi - Interrupt Handler
1129  * @irq: interrupt number
1130  * @data: pointer to a network interface device structure
1131  **/
1132 static irqreturn_t e1000_intr_msi(int irq, void *data)
1133 {
1134         struct net_device *netdev = data;
1135         struct e1000_adapter *adapter = netdev_priv(netdev);
1136         struct e1000_hw *hw = &adapter->hw;
1137         u32 icr = er32(ICR);
1138
1139         /*
1140          * read ICR disables interrupts using IAM
1141          */
1142
1143         if (icr & E1000_ICR_LSC) {
1144                 hw->mac.get_link_status = 1;
1145                 /*
1146                  * ICH8 workaround-- Call gig speed drop workaround on cable
1147                  * disconnect (LSC) before accessing any PHY registers
1148                  */
1149                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1150                     (!(er32(STATUS) & E1000_STATUS_LU)))
1151                         schedule_work(&adapter->downshift_task);
1152
1153                 /*
1154                  * 80003ES2LAN workaround-- For packet buffer work-around on
1155                  * link down event; disable receives here in the ISR and reset
1156                  * adapter in watchdog
1157                  */
1158                 if (netif_carrier_ok(netdev) &&
1159                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1160                         /* disable receives */
1161                         u32 rctl = er32(RCTL);
1162                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1163                         adapter->flags |= FLAG_RX_RESTART_NOW;
1164                 }
1165                 /* guard against interrupt when we're going down */
1166                 if (!test_bit(__E1000_DOWN, &adapter->state))
1167                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1168         }
1169
1170         if (napi_schedule_prep(&adapter->napi)) {
1171                 adapter->total_tx_bytes = 0;
1172                 adapter->total_tx_packets = 0;
1173                 adapter->total_rx_bytes = 0;
1174                 adapter->total_rx_packets = 0;
1175                 __napi_schedule(&adapter->napi);
1176         }
1177
1178         return IRQ_HANDLED;
1179 }
1180
1181 /**
1182  * e1000_intr - Interrupt Handler
1183  * @irq: interrupt number
1184  * @data: pointer to a network interface device structure
1185  **/
1186 static irqreturn_t e1000_intr(int irq, void *data)
1187 {
1188         struct net_device *netdev = data;
1189         struct e1000_adapter *adapter = netdev_priv(netdev);
1190         struct e1000_hw *hw = &adapter->hw;
1191         u32 rctl, icr = er32(ICR);
1192
1193         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1194                 return IRQ_NONE;  /* Not our interrupt */
1195
1196         /*
1197          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1198          * not set, then the adapter didn't send an interrupt
1199          */
1200         if (!(icr & E1000_ICR_INT_ASSERTED))
1201                 return IRQ_NONE;
1202
1203         /*
1204          * Interrupt Auto-Mask...upon reading ICR,
1205          * interrupts are masked.  No need for the
1206          * IMC write
1207          */
1208
1209         if (icr & E1000_ICR_LSC) {
1210                 hw->mac.get_link_status = 1;
1211                 /*
1212                  * ICH8 workaround-- Call gig speed drop workaround on cable
1213                  * disconnect (LSC) before accessing any PHY registers
1214                  */
1215                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1216                     (!(er32(STATUS) & E1000_STATUS_LU)))
1217                         schedule_work(&adapter->downshift_task);
1218
1219                 /*
1220                  * 80003ES2LAN workaround--
1221                  * For packet buffer work-around on link down event;
1222                  * disable receives here in the ISR and
1223                  * reset adapter in watchdog
1224                  */
1225                 if (netif_carrier_ok(netdev) &&
1226                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1227                         /* disable receives */
1228                         rctl = er32(RCTL);
1229                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1230                         adapter->flags |= FLAG_RX_RESTART_NOW;
1231                 }
1232                 /* guard against interrupt when we're going down */
1233                 if (!test_bit(__E1000_DOWN, &adapter->state))
1234                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1235         }
1236
1237         if (napi_schedule_prep(&adapter->napi)) {
1238                 adapter->total_tx_bytes = 0;
1239                 adapter->total_tx_packets = 0;
1240                 adapter->total_rx_bytes = 0;
1241                 adapter->total_rx_packets = 0;
1242                 __napi_schedule(&adapter->napi);
1243         }
1244
1245         return IRQ_HANDLED;
1246 }
1247
1248 static irqreturn_t e1000_msix_other(int irq, void *data)
1249 {
1250         struct net_device *netdev = data;
1251         struct e1000_adapter *adapter = netdev_priv(netdev);
1252         struct e1000_hw *hw = &adapter->hw;
1253         u32 icr = er32(ICR);
1254
1255         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1256                 if (!test_bit(__E1000_DOWN, &adapter->state))
1257                         ew32(IMS, E1000_IMS_OTHER);
1258                 return IRQ_NONE;
1259         }
1260
1261         if (icr & adapter->eiac_mask)
1262                 ew32(ICS, (icr & adapter->eiac_mask));
1263
1264         if (icr & E1000_ICR_OTHER) {
1265                 if (!(icr & E1000_ICR_LSC))
1266                         goto no_link_interrupt;
1267                 hw->mac.get_link_status = 1;
1268                 /* guard against interrupt when we're going down */
1269                 if (!test_bit(__E1000_DOWN, &adapter->state))
1270                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1271         }
1272
1273 no_link_interrupt:
1274         if (!test_bit(__E1000_DOWN, &adapter->state))
1275                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1276
1277         return IRQ_HANDLED;
1278 }
1279
1280
1281 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1282 {
1283         struct net_device *netdev = data;
1284         struct e1000_adapter *adapter = netdev_priv(netdev);
1285         struct e1000_hw *hw = &adapter->hw;
1286         struct e1000_ring *tx_ring = adapter->tx_ring;
1287
1288
1289         adapter->total_tx_bytes = 0;
1290         adapter->total_tx_packets = 0;
1291
1292         if (!e1000_clean_tx_irq(adapter))
1293                 /* Ring was not completely cleaned, so fire another interrupt */
1294                 ew32(ICS, tx_ring->ims_val);
1295
1296         return IRQ_HANDLED;
1297 }
1298
1299 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1300 {
1301         struct net_device *netdev = data;
1302         struct e1000_adapter *adapter = netdev_priv(netdev);
1303
1304         /* Write the ITR value calculated at the end of the
1305          * previous interrupt.
1306          */
1307         if (adapter->rx_ring->set_itr) {
1308                 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1309                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1310                 adapter->rx_ring->set_itr = 0;
1311         }
1312
1313         if (napi_schedule_prep(&adapter->napi)) {
1314                 adapter->total_rx_bytes = 0;
1315                 adapter->total_rx_packets = 0;
1316                 __napi_schedule(&adapter->napi);
1317         }
1318         return IRQ_HANDLED;
1319 }
1320
1321 /**
1322  * e1000_configure_msix - Configure MSI-X hardware
1323  *
1324  * e1000_configure_msix sets up the hardware to properly
1325  * generate MSI-X interrupts.
1326  **/
1327 static void e1000_configure_msix(struct e1000_adapter *adapter)
1328 {
1329         struct e1000_hw *hw = &adapter->hw;
1330         struct e1000_ring *rx_ring = adapter->rx_ring;
1331         struct e1000_ring *tx_ring = adapter->tx_ring;
1332         int vector = 0;
1333         u32 ctrl_ext, ivar = 0;
1334
1335         adapter->eiac_mask = 0;
1336
1337         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1338         if (hw->mac.type == e1000_82574) {
1339                 u32 rfctl = er32(RFCTL);
1340                 rfctl |= E1000_RFCTL_ACK_DIS;
1341                 ew32(RFCTL, rfctl);
1342         }
1343
1344 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1345         /* Configure Rx vector */
1346         rx_ring->ims_val = E1000_IMS_RXQ0;
1347         adapter->eiac_mask |= rx_ring->ims_val;
1348         if (rx_ring->itr_val)
1349                 writel(1000000000 / (rx_ring->itr_val * 256),
1350                        hw->hw_addr + rx_ring->itr_register);
1351         else
1352                 writel(1, hw->hw_addr + rx_ring->itr_register);
1353         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1354
1355         /* Configure Tx vector */
1356         tx_ring->ims_val = E1000_IMS_TXQ0;
1357         vector++;
1358         if (tx_ring->itr_val)
1359                 writel(1000000000 / (tx_ring->itr_val * 256),
1360                        hw->hw_addr + tx_ring->itr_register);
1361         else
1362                 writel(1, hw->hw_addr + tx_ring->itr_register);
1363         adapter->eiac_mask |= tx_ring->ims_val;
1364         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1365
1366         /* set vector for Other Causes, e.g. link changes */
1367         vector++;
1368         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1369         if (rx_ring->itr_val)
1370                 writel(1000000000 / (rx_ring->itr_val * 256),
1371                        hw->hw_addr + E1000_EITR_82574(vector));
1372         else
1373                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1374
1375         /* Cause Tx interrupts on every write back */
1376         ivar |= (1 << 31);
1377
1378         ew32(IVAR, ivar);
1379
1380         /* enable MSI-X PBA support */
1381         ctrl_ext = er32(CTRL_EXT);
1382         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1383
1384         /* Auto-Mask Other interrupts upon ICR read */
1385 #define E1000_EIAC_MASK_82574   0x01F00000
1386         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1387         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1388         ew32(CTRL_EXT, ctrl_ext);
1389         e1e_flush();
1390 }
1391
1392 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1393 {
1394         if (adapter->msix_entries) {
1395                 pci_disable_msix(adapter->pdev);
1396                 kfree(adapter->msix_entries);
1397                 adapter->msix_entries = NULL;
1398         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1399                 pci_disable_msi(adapter->pdev);
1400                 adapter->flags &= ~FLAG_MSI_ENABLED;
1401         }
1402
1403         return;
1404 }
1405
1406 /**
1407  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1408  *
1409  * Attempt to configure interrupts using the best available
1410  * capabilities of the hardware and kernel.
1411  **/
1412 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1413 {
1414         int err;
1415         int numvecs, i;
1416
1417
1418         switch (adapter->int_mode) {
1419         case E1000E_INT_MODE_MSIX:
1420                 if (adapter->flags & FLAG_HAS_MSIX) {
1421                         numvecs = 3; /* RxQ0, TxQ0 and other */
1422                         adapter->msix_entries = kcalloc(numvecs,
1423                                                       sizeof(struct msix_entry),
1424                                                       GFP_KERNEL);
1425                         if (adapter->msix_entries) {
1426                                 for (i = 0; i < numvecs; i++)
1427                                         adapter->msix_entries[i].entry = i;
1428
1429                                 err = pci_enable_msix(adapter->pdev,
1430                                                       adapter->msix_entries,
1431                                                       numvecs);
1432                                 if (err == 0)
1433                                         return;
1434                         }
1435                         /* MSI-X failed, so fall through and try MSI */
1436                         e_err("Failed to initialize MSI-X interrupts.  "
1437                               "Falling back to MSI interrupts.\n");
1438                         e1000e_reset_interrupt_capability(adapter);
1439                 }
1440                 adapter->int_mode = E1000E_INT_MODE_MSI;
1441                 /* Fall through */
1442         case E1000E_INT_MODE_MSI:
1443                 if (!pci_enable_msi(adapter->pdev)) {
1444                         adapter->flags |= FLAG_MSI_ENABLED;
1445                 } else {
1446                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1447                         e_err("Failed to initialize MSI interrupts.  Falling "
1448                               "back to legacy interrupts.\n");
1449                 }
1450                 /* Fall through */
1451         case E1000E_INT_MODE_LEGACY:
1452                 /* Don't do anything; this is the system default */
1453                 break;
1454         }
1455
1456         return;
1457 }
1458
1459 /**
1460  * e1000_request_msix - Initialize MSI-X interrupts
1461  *
1462  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1463  * kernel.
1464  **/
1465 static int e1000_request_msix(struct e1000_adapter *adapter)
1466 {
1467         struct net_device *netdev = adapter->netdev;
1468         int err = 0, vector = 0;
1469
1470         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1471                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1472         else
1473                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1474         err = request_irq(adapter->msix_entries[vector].vector,
1475                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1476                           netdev);
1477         if (err)
1478                 goto out;
1479         adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1480         adapter->rx_ring->itr_val = adapter->itr;
1481         vector++;
1482
1483         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1484                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1485         else
1486                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1487         err = request_irq(adapter->msix_entries[vector].vector,
1488                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1489                           netdev);
1490         if (err)
1491                 goto out;
1492         adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1493         adapter->tx_ring->itr_val = adapter->itr;
1494         vector++;
1495
1496         err = request_irq(adapter->msix_entries[vector].vector,
1497                           e1000_msix_other, 0, netdev->name, netdev);
1498         if (err)
1499                 goto out;
1500
1501         e1000_configure_msix(adapter);
1502         return 0;
1503 out:
1504         return err;
1505 }
1506
1507 /**
1508  * e1000_request_irq - initialize interrupts
1509  *
1510  * Attempts to configure interrupts using the best available
1511  * capabilities of the hardware and kernel.
1512  **/
1513 static int e1000_request_irq(struct e1000_adapter *adapter)
1514 {
1515         struct net_device *netdev = adapter->netdev;
1516         int err;
1517
1518         if (adapter->msix_entries) {
1519                 err = e1000_request_msix(adapter);
1520                 if (!err)
1521                         return err;
1522                 /* fall back to MSI */
1523                 e1000e_reset_interrupt_capability(adapter);
1524                 adapter->int_mode = E1000E_INT_MODE_MSI;
1525                 e1000e_set_interrupt_capability(adapter);
1526         }
1527         if (adapter->flags & FLAG_MSI_ENABLED) {
1528                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
1529                                   netdev->name, netdev);
1530                 if (!err)
1531                         return err;
1532
1533                 /* fall back to legacy interrupt */
1534                 e1000e_reset_interrupt_capability(adapter);
1535                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1536         }
1537
1538         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
1539                           netdev->name, netdev);
1540         if (err)
1541                 e_err("Unable to allocate interrupt, Error: %d\n", err);
1542
1543         return err;
1544 }
1545
1546 static void e1000_free_irq(struct e1000_adapter *adapter)
1547 {
1548         struct net_device *netdev = adapter->netdev;
1549
1550         if (adapter->msix_entries) {
1551                 int vector = 0;
1552
1553                 free_irq(adapter->msix_entries[vector].vector, netdev);
1554                 vector++;
1555
1556                 free_irq(adapter->msix_entries[vector].vector, netdev);
1557                 vector++;
1558
1559                 /* Other Causes interrupt vector */
1560                 free_irq(adapter->msix_entries[vector].vector, netdev);
1561                 return;
1562         }
1563
1564         free_irq(adapter->pdev->irq, netdev);
1565 }
1566
1567 /**
1568  * e1000_irq_disable - Mask off interrupt generation on the NIC
1569  **/
1570 static void e1000_irq_disable(struct e1000_adapter *adapter)
1571 {
1572         struct e1000_hw *hw = &adapter->hw;
1573
1574         ew32(IMC, ~0);
1575         if (adapter->msix_entries)
1576                 ew32(EIAC_82574, 0);
1577         e1e_flush();
1578         synchronize_irq(adapter->pdev->irq);
1579 }
1580
1581 /**
1582  * e1000_irq_enable - Enable default interrupt generation settings
1583  **/
1584 static void e1000_irq_enable(struct e1000_adapter *adapter)
1585 {
1586         struct e1000_hw *hw = &adapter->hw;
1587
1588         if (adapter->msix_entries) {
1589                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1590                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1591         } else {
1592                 ew32(IMS, IMS_ENABLE_MASK);
1593         }
1594         e1e_flush();
1595 }
1596
1597 /**
1598  * e1000_get_hw_control - get control of the h/w from f/w
1599  * @adapter: address of board private structure
1600  *
1601  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1602  * For ASF and Pass Through versions of f/w this means that
1603  * the driver is loaded. For AMT version (only with 82573)
1604  * of the f/w this means that the network i/f is open.
1605  **/
1606 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1607 {
1608         struct e1000_hw *hw = &adapter->hw;
1609         u32 ctrl_ext;
1610         u32 swsm;
1611
1612         /* Let firmware know the driver has taken over */
1613         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1614                 swsm = er32(SWSM);
1615                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1616         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1617                 ctrl_ext = er32(CTRL_EXT);
1618                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1619         }
1620 }
1621
1622 /**
1623  * e1000_release_hw_control - release control of the h/w to f/w
1624  * @adapter: address of board private structure
1625  *
1626  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1627  * For ASF and Pass Through versions of f/w this means that the
1628  * driver is no longer loaded. For AMT version (only with 82573) i
1629  * of the f/w this means that the network i/f is closed.
1630  *
1631  **/
1632 static void e1000_release_hw_control(struct e1000_adapter *adapter)
1633 {
1634         struct e1000_hw *hw = &adapter->hw;
1635         u32 ctrl_ext;
1636         u32 swsm;
1637
1638         /* Let firmware taken over control of h/w */
1639         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1640                 swsm = er32(SWSM);
1641                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1642         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1643                 ctrl_ext = er32(CTRL_EXT);
1644                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1645         }
1646 }
1647
1648 /**
1649  * @e1000_alloc_ring - allocate memory for a ring structure
1650  **/
1651 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1652                                 struct e1000_ring *ring)
1653 {
1654         struct pci_dev *pdev = adapter->pdev;
1655
1656         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1657                                         GFP_KERNEL);
1658         if (!ring->desc)
1659                 return -ENOMEM;
1660
1661         return 0;
1662 }
1663
1664 /**
1665  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1666  * @adapter: board private structure
1667  *
1668  * Return 0 on success, negative on failure
1669  **/
1670 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1671 {
1672         struct e1000_ring *tx_ring = adapter->tx_ring;
1673         int err = -ENOMEM, size;
1674
1675         size = sizeof(struct e1000_buffer) * tx_ring->count;
1676         tx_ring->buffer_info = vmalloc(size);
1677         if (!tx_ring->buffer_info)
1678                 goto err;
1679         memset(tx_ring->buffer_info, 0, size);
1680
1681         /* round up to nearest 4K */
1682         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1683         tx_ring->size = ALIGN(tx_ring->size, 4096);
1684
1685         err = e1000_alloc_ring_dma(adapter, tx_ring);
1686         if (err)
1687                 goto err;
1688
1689         tx_ring->next_to_use = 0;
1690         tx_ring->next_to_clean = 0;
1691
1692         return 0;
1693 err:
1694         vfree(tx_ring->buffer_info);
1695         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1696         return err;
1697 }
1698
1699 /**
1700  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1701  * @adapter: board private structure
1702  *
1703  * Returns 0 on success, negative on failure
1704  **/
1705 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1706 {
1707         struct e1000_ring *rx_ring = adapter->rx_ring;
1708         struct e1000_buffer *buffer_info;
1709         int i, size, desc_len, err = -ENOMEM;
1710
1711         size = sizeof(struct e1000_buffer) * rx_ring->count;
1712         rx_ring->buffer_info = vmalloc(size);
1713         if (!rx_ring->buffer_info)
1714                 goto err;
1715         memset(rx_ring->buffer_info, 0, size);
1716
1717         for (i = 0; i < rx_ring->count; i++) {
1718                 buffer_info = &rx_ring->buffer_info[i];
1719                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1720                                                 sizeof(struct e1000_ps_page),
1721                                                 GFP_KERNEL);
1722                 if (!buffer_info->ps_pages)
1723                         goto err_pages;
1724         }
1725
1726         desc_len = sizeof(union e1000_rx_desc_packet_split);
1727
1728         /* Round up to nearest 4K */
1729         rx_ring->size = rx_ring->count * desc_len;
1730         rx_ring->size = ALIGN(rx_ring->size, 4096);
1731
1732         err = e1000_alloc_ring_dma(adapter, rx_ring);
1733         if (err)
1734                 goto err_pages;
1735
1736         rx_ring->next_to_clean = 0;
1737         rx_ring->next_to_use = 0;
1738         rx_ring->rx_skb_top = NULL;
1739
1740         return 0;
1741
1742 err_pages:
1743         for (i = 0; i < rx_ring->count; i++) {
1744                 buffer_info = &rx_ring->buffer_info[i];
1745                 kfree(buffer_info->ps_pages);
1746         }
1747 err:
1748         vfree(rx_ring->buffer_info);
1749         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1750         return err;
1751 }
1752
1753 /**
1754  * e1000_clean_tx_ring - Free Tx Buffers
1755  * @adapter: board private structure
1756  **/
1757 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1758 {
1759         struct e1000_ring *tx_ring = adapter->tx_ring;
1760         struct e1000_buffer *buffer_info;
1761         unsigned long size;
1762         unsigned int i;
1763
1764         for (i = 0; i < tx_ring->count; i++) {
1765                 buffer_info = &tx_ring->buffer_info[i];
1766                 e1000_put_txbuf(adapter, buffer_info);
1767         }
1768
1769         size = sizeof(struct e1000_buffer) * tx_ring->count;
1770         memset(tx_ring->buffer_info, 0, size);
1771
1772         memset(tx_ring->desc, 0, tx_ring->size);
1773
1774         tx_ring->next_to_use = 0;
1775         tx_ring->next_to_clean = 0;
1776
1777         writel(0, adapter->hw.hw_addr + tx_ring->head);
1778         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1779 }
1780
1781 /**
1782  * e1000e_free_tx_resources - Free Tx Resources per Queue
1783  * @adapter: board private structure
1784  *
1785  * Free all transmit software resources
1786  **/
1787 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1788 {
1789         struct pci_dev *pdev = adapter->pdev;
1790         struct e1000_ring *tx_ring = adapter->tx_ring;
1791
1792         e1000_clean_tx_ring(adapter);
1793
1794         vfree(tx_ring->buffer_info);
1795         tx_ring->buffer_info = NULL;
1796
1797         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1798                           tx_ring->dma);
1799         tx_ring->desc = NULL;
1800 }
1801
1802 /**
1803  * e1000e_free_rx_resources - Free Rx Resources
1804  * @adapter: board private structure
1805  *
1806  * Free all receive software resources
1807  **/
1808
1809 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1810 {
1811         struct pci_dev *pdev = adapter->pdev;
1812         struct e1000_ring *rx_ring = adapter->rx_ring;
1813         int i;
1814
1815         e1000_clean_rx_ring(adapter);
1816
1817         for (i = 0; i < rx_ring->count; i++) {
1818                 kfree(rx_ring->buffer_info[i].ps_pages);
1819         }
1820
1821         vfree(rx_ring->buffer_info);
1822         rx_ring->buffer_info = NULL;
1823
1824         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1825                           rx_ring->dma);
1826         rx_ring->desc = NULL;
1827 }
1828
1829 /**
1830  * e1000_update_itr - update the dynamic ITR value based on statistics
1831  * @adapter: pointer to adapter
1832  * @itr_setting: current adapter->itr
1833  * @packets: the number of packets during this measurement interval
1834  * @bytes: the number of bytes during this measurement interval
1835  *
1836  *      Stores a new ITR value based on packets and byte
1837  *      counts during the last interrupt.  The advantage of per interrupt
1838  *      computation is faster updates and more accurate ITR for the current
1839  *      traffic pattern.  Constants in this function were computed
1840  *      based on theoretical maximum wire speed and thresholds were set based
1841  *      on testing data as well as attempting to minimize response time
1842  *      while increasing bulk throughput.  This functionality is controlled
1843  *      by the InterruptThrottleRate module parameter.
1844  **/
1845 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1846                                      u16 itr_setting, int packets,
1847                                      int bytes)
1848 {
1849         unsigned int retval = itr_setting;
1850
1851         if (packets == 0)
1852                 goto update_itr_done;
1853
1854         switch (itr_setting) {
1855         case lowest_latency:
1856                 /* handle TSO and jumbo frames */
1857                 if (bytes/packets > 8000)
1858                         retval = bulk_latency;
1859                 else if ((packets < 5) && (bytes > 512)) {
1860                         retval = low_latency;
1861                 }
1862                 break;
1863         case low_latency:  /* 50 usec aka 20000 ints/s */
1864                 if (bytes > 10000) {
1865                         /* this if handles the TSO accounting */
1866                         if (bytes/packets > 8000) {
1867                                 retval = bulk_latency;
1868                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1869                                 retval = bulk_latency;
1870                         } else if ((packets > 35)) {
1871                                 retval = lowest_latency;
1872                         }
1873                 } else if (bytes/packets > 2000) {
1874                         retval = bulk_latency;
1875                 } else if (packets <= 2 && bytes < 512) {
1876                         retval = lowest_latency;
1877                 }
1878                 break;
1879         case bulk_latency: /* 250 usec aka 4000 ints/s */
1880                 if (bytes > 25000) {
1881                         if (packets > 35) {
1882                                 retval = low_latency;
1883                         }
1884                 } else if (bytes < 6000) {
1885                         retval = low_latency;
1886                 }
1887                 break;
1888         }
1889
1890 update_itr_done:
1891         return retval;
1892 }
1893
1894 static void e1000_set_itr(struct e1000_adapter *adapter)
1895 {
1896         struct e1000_hw *hw = &adapter->hw;
1897         u16 current_itr;
1898         u32 new_itr = adapter->itr;
1899
1900         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1901         if (adapter->link_speed != SPEED_1000) {
1902                 current_itr = 0;
1903                 new_itr = 4000;
1904                 goto set_itr_now;
1905         }
1906
1907         adapter->tx_itr = e1000_update_itr(adapter,
1908                                     adapter->tx_itr,
1909                                     adapter->total_tx_packets,
1910                                     adapter->total_tx_bytes);
1911         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1912         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1913                 adapter->tx_itr = low_latency;
1914
1915         adapter->rx_itr = e1000_update_itr(adapter,
1916                                     adapter->rx_itr,
1917                                     adapter->total_rx_packets,
1918                                     adapter->total_rx_bytes);
1919         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1920         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1921                 adapter->rx_itr = low_latency;
1922
1923         current_itr = max(adapter->rx_itr, adapter->tx_itr);
1924
1925         switch (current_itr) {
1926         /* counts and packets in update_itr are dependent on these numbers */
1927         case lowest_latency:
1928                 new_itr = 70000;
1929                 break;
1930         case low_latency:
1931                 new_itr = 20000; /* aka hwitr = ~200 */
1932                 break;
1933         case bulk_latency:
1934                 new_itr = 4000;
1935                 break;
1936         default:
1937                 break;
1938         }
1939
1940 set_itr_now:
1941         if (new_itr != adapter->itr) {
1942                 /*
1943                  * this attempts to bias the interrupt rate towards Bulk
1944                  * by adding intermediate steps when interrupt rate is
1945                  * increasing
1946                  */
1947                 new_itr = new_itr > adapter->itr ?
1948                              min(adapter->itr + (new_itr >> 2), new_itr) :
1949                              new_itr;
1950                 adapter->itr = new_itr;
1951                 adapter->rx_ring->itr_val = new_itr;
1952                 if (adapter->msix_entries)
1953                         adapter->rx_ring->set_itr = 1;
1954                 else
1955                         ew32(ITR, 1000000000 / (new_itr * 256));
1956         }
1957 }
1958
1959 /**
1960  * e1000_alloc_queues - Allocate memory for all rings
1961  * @adapter: board private structure to initialize
1962  **/
1963 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1964 {
1965         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1966         if (!adapter->tx_ring)
1967                 goto err;
1968
1969         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1970         if (!adapter->rx_ring)
1971                 goto err;
1972
1973         return 0;
1974 err:
1975         e_err("Unable to allocate memory for queues\n");
1976         kfree(adapter->rx_ring);
1977         kfree(adapter->tx_ring);
1978         return -ENOMEM;
1979 }
1980
1981 /**
1982  * e1000_clean - NAPI Rx polling callback
1983  * @napi: struct associated with this polling callback
1984  * @budget: amount of packets driver is allowed to process this poll
1985  **/
1986 static int e1000_clean(struct napi_struct *napi, int budget)
1987 {
1988         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
1989         struct e1000_hw *hw = &adapter->hw;
1990         struct net_device *poll_dev = adapter->netdev;
1991         int tx_cleaned = 1, work_done = 0;
1992
1993         adapter = netdev_priv(poll_dev);
1994
1995         if (adapter->msix_entries &&
1996             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
1997                 goto clean_rx;
1998
1999         tx_cleaned = e1000_clean_tx_irq(adapter);
2000
2001 clean_rx:
2002         adapter->clean_rx(adapter, &work_done, budget);
2003
2004         if (!tx_cleaned)
2005                 work_done = budget;
2006
2007         /* If budget not fully consumed, exit the polling mode */
2008         if (work_done < budget) {
2009                 if (adapter->itr_setting & 3)
2010                         e1000_set_itr(adapter);
2011                 napi_complete(napi);
2012                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2013                         if (adapter->msix_entries)
2014                                 ew32(IMS, adapter->rx_ring->ims_val);
2015                         else
2016                                 e1000_irq_enable(adapter);
2017                 }
2018         }
2019
2020         return work_done;
2021 }
2022
2023 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2024 {
2025         struct e1000_adapter *adapter = netdev_priv(netdev);
2026         struct e1000_hw *hw = &adapter->hw;
2027         u32 vfta, index;
2028
2029         /* don't update vlan cookie if already programmed */
2030         if ((adapter->hw.mng_cookie.status &
2031              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2032             (vid == adapter->mng_vlan_id))
2033                 return;
2034         /* add VID to filter table */
2035         index = (vid >> 5) & 0x7F;
2036         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2037         vfta |= (1 << (vid & 0x1F));
2038         e1000e_write_vfta(hw, index, vfta);
2039 }
2040
2041 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2042 {
2043         struct e1000_adapter *adapter = netdev_priv(netdev);
2044         struct e1000_hw *hw = &adapter->hw;
2045         u32 vfta, index;
2046
2047         if (!test_bit(__E1000_DOWN, &adapter->state))
2048                 e1000_irq_disable(adapter);
2049         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2050
2051         if (!test_bit(__E1000_DOWN, &adapter->state))
2052                 e1000_irq_enable(adapter);
2053
2054         if ((adapter->hw.mng_cookie.status &
2055              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2056             (vid == adapter->mng_vlan_id)) {
2057                 /* release control to f/w */
2058                 e1000_release_hw_control(adapter);
2059                 return;
2060         }
2061
2062         /* remove VID from filter table */
2063         index = (vid >> 5) & 0x7F;
2064         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2065         vfta &= ~(1 << (vid & 0x1F));
2066         e1000e_write_vfta(hw, index, vfta);
2067 }
2068
2069 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2070 {
2071         struct net_device *netdev = adapter->netdev;
2072         u16 vid = adapter->hw.mng_cookie.vlan_id;
2073         u16 old_vid = adapter->mng_vlan_id;
2074
2075         if (!adapter->vlgrp)
2076                 return;
2077
2078         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2079                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2080                 if (adapter->hw.mng_cookie.status &
2081                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2082                         e1000_vlan_rx_add_vid(netdev, vid);
2083                         adapter->mng_vlan_id = vid;
2084                 }
2085
2086                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2087                                 (vid != old_vid) &&
2088                     !vlan_group_get_device(adapter->vlgrp, old_vid))
2089                         e1000_vlan_rx_kill_vid(netdev, old_vid);
2090         } else {
2091                 adapter->mng_vlan_id = vid;
2092         }
2093 }
2094
2095
2096 static void e1000_vlan_rx_register(struct net_device *netdev,
2097                                    struct vlan_group *grp)
2098 {
2099         struct e1000_adapter *adapter = netdev_priv(netdev);
2100         struct e1000_hw *hw = &adapter->hw;
2101         u32 ctrl, rctl;
2102
2103         if (!test_bit(__E1000_DOWN, &adapter->state))
2104                 e1000_irq_disable(adapter);
2105         adapter->vlgrp = grp;
2106
2107         if (grp) {
2108                 /* enable VLAN tag insert/strip */
2109                 ctrl = er32(CTRL);
2110                 ctrl |= E1000_CTRL_VME;
2111                 ew32(CTRL, ctrl);
2112
2113                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2114                         /* enable VLAN receive filtering */
2115                         rctl = er32(RCTL);
2116                         rctl &= ~E1000_RCTL_CFIEN;
2117                         ew32(RCTL, rctl);
2118                         e1000_update_mng_vlan(adapter);
2119                 }
2120         } else {
2121                 /* disable VLAN tag insert/strip */
2122                 ctrl = er32(CTRL);
2123                 ctrl &= ~E1000_CTRL_VME;
2124                 ew32(CTRL, ctrl);
2125
2126                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2127                         if (adapter->mng_vlan_id !=
2128                             (u16)E1000_MNG_VLAN_NONE) {
2129                                 e1000_vlan_rx_kill_vid(netdev,
2130                                                        adapter->mng_vlan_id);
2131                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2132                         }
2133                 }
2134         }
2135
2136         if (!test_bit(__E1000_DOWN, &adapter->state))
2137                 e1000_irq_enable(adapter);
2138 }
2139
2140 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2141 {
2142         u16 vid;
2143
2144         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2145
2146         if (!adapter->vlgrp)
2147                 return;
2148
2149         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2150                 if (!vlan_group_get_device(adapter->vlgrp, vid))
2151                         continue;
2152                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2153         }
2154 }
2155
2156 static void e1000_init_manageability(struct e1000_adapter *adapter)
2157 {
2158         struct e1000_hw *hw = &adapter->hw;
2159         u32 manc, manc2h;
2160
2161         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2162                 return;
2163
2164         manc = er32(MANC);
2165
2166         /*
2167          * enable receiving management packets to the host. this will probably
2168          * generate destination unreachable messages from the host OS, but
2169          * the packets will be handled on SMBUS
2170          */
2171         manc |= E1000_MANC_EN_MNG2HOST;
2172         manc2h = er32(MANC2H);
2173 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2174 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2175         manc2h |= E1000_MNG2HOST_PORT_623;
2176         manc2h |= E1000_MNG2HOST_PORT_664;
2177         ew32(MANC2H, manc2h);
2178         ew32(MANC, manc);
2179 }
2180
2181 /**
2182  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2183  * @adapter: board private structure
2184  *
2185  * Configure the Tx unit of the MAC after a reset.
2186  **/
2187 static void e1000_configure_tx(struct e1000_adapter *adapter)
2188 {
2189         struct e1000_hw *hw = &adapter->hw;
2190         struct e1000_ring *tx_ring = adapter->tx_ring;
2191         u64 tdba;
2192         u32 tdlen, tctl, tipg, tarc;
2193         u32 ipgr1, ipgr2;
2194
2195         /* Setup the HW Tx Head and Tail descriptor pointers */
2196         tdba = tx_ring->dma;
2197         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2198         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2199         ew32(TDBAH, (tdba >> 32));
2200         ew32(TDLEN, tdlen);
2201         ew32(TDH, 0);
2202         ew32(TDT, 0);
2203         tx_ring->head = E1000_TDH;
2204         tx_ring->tail = E1000_TDT;
2205
2206         /* Set the default values for the Tx Inter Packet Gap timer */
2207         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
2208         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
2209         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
2210
2211         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2212                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
2213
2214         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2215         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2216         ew32(TIPG, tipg);
2217
2218         /* Set the Tx Interrupt Delay register */
2219         ew32(TIDV, adapter->tx_int_delay);
2220         /* Tx irq moderation */
2221         ew32(TADV, adapter->tx_abs_int_delay);
2222
2223         /* Program the Transmit Control Register */
2224         tctl = er32(TCTL);
2225         tctl &= ~E1000_TCTL_CT;
2226         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2227                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2228
2229         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2230                 tarc = er32(TARC(0));
2231                 /*
2232                  * set the speed mode bit, we'll clear it if we're not at
2233                  * gigabit link later
2234                  */
2235 #define SPEED_MODE_BIT (1 << 21)
2236                 tarc |= SPEED_MODE_BIT;
2237                 ew32(TARC(0), tarc);
2238         }
2239
2240         /* errata: program both queues to unweighted RR */
2241         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2242                 tarc = er32(TARC(0));
2243                 tarc |= 1;
2244                 ew32(TARC(0), tarc);
2245                 tarc = er32(TARC(1));
2246                 tarc |= 1;
2247                 ew32(TARC(1), tarc);
2248         }
2249
2250         /* Setup Transmit Descriptor Settings for eop descriptor */
2251         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2252
2253         /* only set IDE if we are delaying interrupts using the timers */
2254         if (adapter->tx_int_delay)
2255                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2256
2257         /* enable Report Status bit */
2258         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2259
2260         ew32(TCTL, tctl);
2261
2262         e1000e_config_collision_dist(hw);
2263
2264         adapter->tx_queue_len = adapter->netdev->tx_queue_len;
2265 }
2266
2267 /**
2268  * e1000_setup_rctl - configure the receive control registers
2269  * @adapter: Board private structure
2270  **/
2271 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2272                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2273 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2274 {
2275         struct e1000_hw *hw = &adapter->hw;
2276         u32 rctl, rfctl;
2277         u32 psrctl = 0;
2278         u32 pages = 0;
2279
2280         /* Program MC offset vector base */
2281         rctl = er32(RCTL);
2282         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2283         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2284                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2285                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2286
2287         /* Do not Store bad packets */
2288         rctl &= ~E1000_RCTL_SBP;
2289
2290         /* Enable Long Packet receive */
2291         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2292                 rctl &= ~E1000_RCTL_LPE;
2293         else
2294                 rctl |= E1000_RCTL_LPE;
2295
2296         /* Some systems expect that the CRC is included in SMBUS traffic. The
2297          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2298          * host memory when this is enabled
2299          */
2300         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2301                 rctl |= E1000_RCTL_SECRC;
2302
2303         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2304         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2305                 u16 phy_data;
2306
2307                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2308                 phy_data &= 0xfff8;
2309                 phy_data |= (1 << 2);
2310                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2311
2312                 e1e_rphy(hw, 22, &phy_data);
2313                 phy_data &= 0x0fff;
2314                 phy_data |= (1 << 14);
2315                 e1e_wphy(hw, 0x10, 0x2823);
2316                 e1e_wphy(hw, 0x11, 0x0003);
2317                 e1e_wphy(hw, 22, phy_data);
2318         }
2319
2320         /* Setup buffer sizes */
2321         rctl &= ~E1000_RCTL_SZ_4096;
2322         rctl |= E1000_RCTL_BSEX;
2323         switch (adapter->rx_buffer_len) {
2324         case 256:
2325                 rctl |= E1000_RCTL_SZ_256;
2326                 rctl &= ~E1000_RCTL_BSEX;
2327                 break;
2328         case 512:
2329                 rctl |= E1000_RCTL_SZ_512;
2330                 rctl &= ~E1000_RCTL_BSEX;
2331                 break;
2332         case 1024:
2333                 rctl |= E1000_RCTL_SZ_1024;
2334                 rctl &= ~E1000_RCTL_BSEX;
2335                 break;
2336         case 2048:
2337         default:
2338                 rctl |= E1000_RCTL_SZ_2048;
2339                 rctl &= ~E1000_RCTL_BSEX;
2340                 break;
2341         case 4096:
2342                 rctl |= E1000_RCTL_SZ_4096;
2343                 break;
2344         case 8192:
2345                 rctl |= E1000_RCTL_SZ_8192;
2346                 break;
2347         case 16384:
2348                 rctl |= E1000_RCTL_SZ_16384;
2349                 break;
2350         }
2351
2352         /*
2353          * 82571 and greater support packet-split where the protocol
2354          * header is placed in skb->data and the packet data is
2355          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2356          * In the case of a non-split, skb->data is linearly filled,
2357          * followed by the page buffers.  Therefore, skb->data is
2358          * sized to hold the largest protocol header.
2359          *
2360          * allocations using alloc_page take too long for regular MTU
2361          * so only enable packet split for jumbo frames
2362          *
2363          * Using pages when the page size is greater than 16k wastes
2364          * a lot of memory, since we allocate 3 pages at all times
2365          * per packet.
2366          */
2367         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2368         if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2369             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2370                 adapter->rx_ps_pages = pages;
2371         else
2372                 adapter->rx_ps_pages = 0;
2373
2374         if (adapter->rx_ps_pages) {
2375                 /* Configure extra packet-split registers */
2376                 rfctl = er32(RFCTL);
2377                 rfctl |= E1000_RFCTL_EXTEN;
2378                 /*
2379                  * disable packet split support for IPv6 extension headers,
2380                  * because some malformed IPv6 headers can hang the Rx
2381                  */
2382                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2383                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2384
2385                 ew32(RFCTL, rfctl);
2386
2387                 /* Enable Packet split descriptors */
2388                 rctl |= E1000_RCTL_DTYP_PS;
2389
2390                 psrctl |= adapter->rx_ps_bsize0 >>
2391                         E1000_PSRCTL_BSIZE0_SHIFT;
2392
2393                 switch (adapter->rx_ps_pages) {
2394                 case 3:
2395                         psrctl |= PAGE_SIZE <<
2396                                 E1000_PSRCTL_BSIZE3_SHIFT;
2397                 case 2:
2398                         psrctl |= PAGE_SIZE <<
2399                                 E1000_PSRCTL_BSIZE2_SHIFT;
2400                 case 1:
2401                         psrctl |= PAGE_SIZE >>
2402                                 E1000_PSRCTL_BSIZE1_SHIFT;
2403                         break;
2404                 }
2405
2406                 ew32(PSRCTL, psrctl);
2407         }
2408
2409         ew32(RCTL, rctl);
2410         /* just started the receive unit, no need to restart */
2411         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2412 }
2413
2414 /**
2415  * e1000_configure_rx - Configure Receive Unit after Reset
2416  * @adapter: board private structure
2417  *
2418  * Configure the Rx unit of the MAC after a reset.
2419  **/
2420 static void e1000_configure_rx(struct e1000_adapter *adapter)
2421 {
2422         struct e1000_hw *hw = &adapter->hw;
2423         struct e1000_ring *rx_ring = adapter->rx_ring;
2424         u64 rdba;
2425         u32 rdlen, rctl, rxcsum, ctrl_ext;
2426
2427         if (adapter->rx_ps_pages) {
2428                 /* this is a 32 byte descriptor */
2429                 rdlen = rx_ring->count *
2430                         sizeof(union e1000_rx_desc_packet_split);
2431                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2432                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2433         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2434                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2435                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2436                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2437         } else {
2438                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2439                 adapter->clean_rx = e1000_clean_rx_irq;
2440                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2441         }
2442
2443         /* disable receives while setting up the descriptors */
2444         rctl = er32(RCTL);
2445         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2446         e1e_flush();
2447         msleep(10);
2448
2449         /* set the Receive Delay Timer Register */
2450         ew32(RDTR, adapter->rx_int_delay);
2451
2452         /* irq moderation */
2453         ew32(RADV, adapter->rx_abs_int_delay);
2454         if (adapter->itr_setting != 0)
2455                 ew32(ITR, 1000000000 / (adapter->itr * 256));
2456
2457         ctrl_ext = er32(CTRL_EXT);
2458         /* Auto-Mask interrupts upon ICR access */
2459         ctrl_ext |= E1000_CTRL_EXT_IAME;
2460         ew32(IAM, 0xffffffff);
2461         ew32(CTRL_EXT, ctrl_ext);
2462         e1e_flush();
2463
2464         /*
2465          * Setup the HW Rx Head and Tail Descriptor Pointers and
2466          * the Base and Length of the Rx Descriptor Ring
2467          */
2468         rdba = rx_ring->dma;
2469         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
2470         ew32(RDBAH, (rdba >> 32));
2471         ew32(RDLEN, rdlen);
2472         ew32(RDH, 0);
2473         ew32(RDT, 0);
2474         rx_ring->head = E1000_RDH;
2475         rx_ring->tail = E1000_RDT;
2476
2477         /* Enable Receive Checksum Offload for TCP and UDP */
2478         rxcsum = er32(RXCSUM);
2479         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2480                 rxcsum |= E1000_RXCSUM_TUOFL;
2481
2482                 /*
2483                  * IPv4 payload checksum for UDP fragments must be
2484                  * used in conjunction with packet-split.
2485                  */
2486                 if (adapter->rx_ps_pages)
2487                         rxcsum |= E1000_RXCSUM_IPPCSE;
2488         } else {
2489                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2490                 /* no need to clear IPPCSE as it defaults to 0 */
2491         }
2492         ew32(RXCSUM, rxcsum);
2493
2494         /*
2495          * Enable early receives on supported devices, only takes effect when
2496          * packet size is equal or larger than the specified value (in 8 byte
2497          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2498          */
2499         if (adapter->flags & FLAG_HAS_ERT) {
2500                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2501                         u32 rxdctl = er32(RXDCTL(0));
2502                         ew32(RXDCTL(0), rxdctl | 0x3);
2503                         ew32(ERT, E1000_ERT_2048 | (1 << 13));
2504                         /*
2505                          * With jumbo frames and early-receive enabled,
2506                          * excessive C-state transition latencies result in
2507                          * dropped transactions.
2508                          */
2509                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2510                                                   adapter->netdev->name, 55);
2511                 } else {
2512                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2513                                                   adapter->netdev->name,
2514                                                   PM_QOS_DEFAULT_VALUE);
2515                 }
2516         }
2517
2518         /* Enable Receives */
2519         ew32(RCTL, rctl);
2520 }
2521
2522 /**
2523  *  e1000_update_mc_addr_list - Update Multicast addresses
2524  *  @hw: pointer to the HW structure
2525  *  @mc_addr_list: array of multicast addresses to program
2526  *  @mc_addr_count: number of multicast addresses to program
2527  *  @rar_used_count: the first RAR register free to program
2528  *  @rar_count: total number of supported Receive Address Registers
2529  *
2530  *  Updates the Receive Address Registers and Multicast Table Array.
2531  *  The caller must have a packed mc_addr_list of multicast addresses.
2532  *  The parameter rar_count will usually be hw->mac.rar_entry_count
2533  *  unless there are workarounds that change this.  Currently no func pointer
2534  *  exists and all implementations are handled in the generic version of this
2535  *  function.
2536  **/
2537 static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2538                                       u32 mc_addr_count, u32 rar_used_count,
2539                                       u32 rar_count)
2540 {
2541         hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count,
2542                                         rar_used_count, rar_count);
2543 }
2544
2545 /**
2546  * e1000_set_multi - Multicast and Promiscuous mode set
2547  * @netdev: network interface device structure
2548  *
2549  * The set_multi entry point is called whenever the multicast address
2550  * list or the network interface flags are updated.  This routine is
2551  * responsible for configuring the hardware for proper multicast,
2552  * promiscuous mode, and all-multi behavior.
2553  **/
2554 static void e1000_set_multi(struct net_device *netdev)
2555 {
2556         struct e1000_adapter *adapter = netdev_priv(netdev);
2557         struct e1000_hw *hw = &adapter->hw;
2558         struct e1000_mac_info *mac = &hw->mac;
2559         struct dev_mc_list *mc_ptr;
2560         u8  *mta_list;
2561         u32 rctl;
2562         int i;
2563
2564         /* Check for Promiscuous and All Multicast modes */
2565
2566         rctl = er32(RCTL);
2567
2568         if (netdev->flags & IFF_PROMISC) {
2569                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2570                 rctl &= ~E1000_RCTL_VFE;
2571         } else {
2572                 if (netdev->flags & IFF_ALLMULTI) {
2573                         rctl |= E1000_RCTL_MPE;
2574                         rctl &= ~E1000_RCTL_UPE;
2575                 } else {
2576                         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2577                 }
2578                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
2579                         rctl |= E1000_RCTL_VFE;
2580         }
2581
2582         ew32(RCTL, rctl);
2583
2584         if (netdev->mc_count) {
2585                 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
2586                 if (!mta_list)
2587                         return;
2588
2589                 /* prepare a packed array of only addresses. */
2590                 mc_ptr = netdev->mc_list;
2591
2592                 for (i = 0; i < netdev->mc_count; i++) {
2593                         if (!mc_ptr)
2594                                 break;
2595                         memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
2596                                ETH_ALEN);
2597                         mc_ptr = mc_ptr->next;
2598                 }
2599
2600                 e1000_update_mc_addr_list(hw, mta_list, i, 1,
2601                                           mac->rar_entry_count);
2602                 kfree(mta_list);
2603         } else {
2604                 /*
2605                  * if we're called from probe, we might not have
2606                  * anything to do here, so clear out the list
2607                  */
2608                 e1000_update_mc_addr_list(hw, NULL, 0, 1, mac->rar_entry_count);
2609         }
2610 }
2611
2612 /**
2613  * e1000_configure - configure the hardware for Rx and Tx
2614  * @adapter: private board structure
2615  **/
2616 static void e1000_configure(struct e1000_adapter *adapter)
2617 {
2618         e1000_set_multi(adapter->netdev);
2619
2620         e1000_restore_vlan(adapter);
2621         e1000_init_manageability(adapter);
2622
2623         e1000_configure_tx(adapter);
2624         e1000_setup_rctl(adapter);
2625         e1000_configure_rx(adapter);
2626         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
2627 }
2628
2629 /**
2630  * e1000e_power_up_phy - restore link in case the phy was powered down
2631  * @adapter: address of board private structure
2632  *
2633  * The phy may be powered down to save power and turn off link when the
2634  * driver is unloaded and wake on lan is not enabled (among others)
2635  * *** this routine MUST be followed by a call to e1000e_reset ***
2636  **/
2637 void e1000e_power_up_phy(struct e1000_adapter *adapter)
2638 {
2639         u16 mii_reg = 0;
2640
2641         /* Just clear the power down bit to wake the phy back up */
2642         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
2643                 /*
2644                  * According to the manual, the phy will retain its
2645                  * settings across a power-down/up cycle
2646                  */
2647                 e1e_rphy(&adapter->hw, PHY_CONTROL, &mii_reg);
2648                 mii_reg &= ~MII_CR_POWER_DOWN;
2649                 e1e_wphy(&adapter->hw, PHY_CONTROL, mii_reg);
2650         }
2651
2652         adapter->hw.mac.ops.setup_link(&adapter->hw);
2653 }
2654
2655 /**
2656  * e1000_power_down_phy - Power down the PHY
2657  *
2658  * Power down the PHY so no link is implied when interface is down
2659  * The PHY cannot be powered down is management or WoL is active
2660  */
2661 static void e1000_power_down_phy(struct e1000_adapter *adapter)
2662 {
2663         struct e1000_hw *hw = &adapter->hw;
2664         u16 mii_reg;
2665
2666         /* WoL is enabled */
2667         if (adapter->wol)
2668                 return;
2669
2670         /* non-copper PHY? */
2671         if (adapter->hw.phy.media_type != e1000_media_type_copper)
2672                 return;
2673
2674         /* reset is blocked because of a SoL/IDER session */
2675         if (e1000e_check_mng_mode(hw) || e1000_check_reset_block(hw))
2676                 return;
2677
2678         /* manageability (AMT) is enabled */
2679         if (er32(MANC) & E1000_MANC_SMBUS_EN)
2680                 return;
2681
2682         /* power down the PHY */
2683         e1e_rphy(hw, PHY_CONTROL, &mii_reg);
2684         mii_reg |= MII_CR_POWER_DOWN;
2685         e1e_wphy(hw, PHY_CONTROL, mii_reg);
2686         mdelay(1);
2687 }
2688
2689 /**
2690  * e1000e_reset - bring the hardware into a known good state
2691  *
2692  * This function boots the hardware and enables some settings that
2693  * require a configuration cycle of the hardware - those cannot be
2694  * set/changed during runtime. After reset the device needs to be
2695  * properly configured for Rx, Tx etc.
2696  */
2697 void e1000e_reset(struct e1000_adapter *adapter)
2698 {
2699         struct e1000_mac_info *mac = &adapter->hw.mac;
2700         struct e1000_fc_info *fc = &adapter->hw.fc;
2701         struct e1000_hw *hw = &adapter->hw;
2702         u32 tx_space, min_tx_space, min_rx_space;
2703         u32 pba = adapter->pba;
2704         u16 hwm;
2705
2706         /* reset Packet Buffer Allocation to default */
2707         ew32(PBA, pba);
2708
2709         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
2710                 /*
2711                  * To maintain wire speed transmits, the Tx FIFO should be
2712                  * large enough to accommodate two full transmit packets,
2713                  * rounded up to the next 1KB and expressed in KB.  Likewise,
2714                  * the Rx FIFO should be large enough to accommodate at least
2715                  * one full receive packet and is similarly rounded up and
2716                  * expressed in KB.
2717                  */
2718                 pba = er32(PBA);
2719                 /* upper 16 bits has Tx packet buffer allocation size in KB */
2720                 tx_space = pba >> 16;
2721                 /* lower 16 bits has Rx packet buffer allocation size in KB */
2722                 pba &= 0xffff;
2723                 /*
2724                  * the Tx fifo also stores 16 bytes of information about the tx
2725                  * but don't include ethernet FCS because hardware appends it
2726                  */
2727                 min_tx_space = (adapter->max_frame_size +
2728                                 sizeof(struct e1000_tx_desc) -
2729                                 ETH_FCS_LEN) * 2;
2730                 min_tx_space = ALIGN(min_tx_space, 1024);
2731                 min_tx_space >>= 10;
2732                 /* software strips receive CRC, so leave room for it */
2733                 min_rx_space = adapter->max_frame_size;
2734                 min_rx_space = ALIGN(min_rx_space, 1024);
2735                 min_rx_space >>= 10;
2736
2737                 /*
2738                  * If current Tx allocation is less than the min Tx FIFO size,
2739                  * and the min Tx FIFO size is less than the current Rx FIFO
2740                  * allocation, take space away from current Rx allocation
2741                  */
2742                 if ((tx_space < min_tx_space) &&
2743                     ((min_tx_space - tx_space) < pba)) {
2744                         pba -= min_tx_space - tx_space;
2745
2746                         /*
2747                          * if short on Rx space, Rx wins and must trump tx
2748                          * adjustment or use Early Receive if available
2749                          */
2750                         if ((pba < min_rx_space) &&
2751                             (!(adapter->flags & FLAG_HAS_ERT)))
2752                                 /* ERT enabled in e1000_configure_rx */
2753                                 pba = min_rx_space;
2754                 }
2755
2756                 ew32(PBA, pba);
2757         }
2758
2759
2760         /*
2761          * flow control settings
2762          *
2763          * The high water mark must be low enough to fit two full frame
2764          * (or the size used for early receive) above it in the Rx FIFO.
2765          * Set it to the lower of:
2766          * - 90% of the Rx FIFO size, and
2767          * - the full Rx FIFO size minus the early receive size (for parts
2768          *   with ERT support assuming ERT set to E1000_ERT_2048), or
2769          * - the full Rx FIFO size minus two full frames
2770          */
2771         if ((adapter->flags & FLAG_HAS_ERT) &&
2772             (adapter->netdev->mtu > ETH_DATA_LEN))
2773                 hwm = min(((pba << 10) * 9 / 10),
2774                           ((pba << 10) - (E1000_ERT_2048 << 3)));
2775         else
2776                 hwm = min(((pba << 10) * 9 / 10),
2777                           ((pba << 10) - (2 * adapter->max_frame_size)));
2778
2779         fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
2780         fc->low_water = (fc->high_water - (2 * adapter->max_frame_size));
2781         fc->low_water &= E1000_FCRTL_RTL; /* 8-byte granularity */
2782
2783         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
2784                 fc->pause_time = 0xFFFF;
2785         else
2786                 fc->pause_time = E1000_FC_PAUSE_TIME;
2787         fc->send_xon = 1;
2788         fc->current_mode = fc->requested_mode;
2789
2790         /* Allow time for pending master requests to run */
2791         mac->ops.reset_hw(hw);
2792
2793         /*
2794          * For parts with AMT enabled, let the firmware know
2795          * that the network interface is in control
2796          */
2797         if (adapter->flags & FLAG_HAS_AMT)
2798                 e1000_get_hw_control(adapter);
2799
2800         ew32(WUC, 0);
2801         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)
2802                 e1e_wphy(&adapter->hw, BM_WUC, 0);
2803
2804         if (mac->ops.init_hw(hw))
2805                 e_err("Hardware Error\n");
2806
2807         e1000_update_mng_vlan(adapter);
2808
2809         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2810         ew32(VET, ETH_P_8021Q);
2811
2812         e1000e_reset_adaptive(hw);
2813         e1000_get_phy_info(hw);
2814
2815         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
2816             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2817                 u16 phy_data = 0;
2818                 /*
2819                  * speed up time to link by disabling smart power down, ignore
2820                  * the return value of this function because there is nothing
2821                  * different we would do if it failed
2822                  */
2823                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2824                 phy_data &= ~IGP02E1000_PM_SPD;
2825                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2826         }
2827 }
2828
2829 int e1000e_up(struct e1000_adapter *adapter)
2830 {
2831         struct e1000_hw *hw = &adapter->hw;
2832
2833         /* DMA latency requirement to workaround early-receive/jumbo issue */
2834         if (adapter->flags & FLAG_HAS_ERT)
2835                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
2836                                        adapter->netdev->name,
2837                                        PM_QOS_DEFAULT_VALUE);
2838
2839         /* hardware has been reset, we need to reload some things */
2840         e1000_configure(adapter);
2841
2842         clear_bit(__E1000_DOWN, &adapter->state);
2843
2844         napi_enable(&adapter->napi);
2845         if (adapter->msix_entries)
2846                 e1000_configure_msix(adapter);
2847         e1000_irq_enable(adapter);
2848
2849         netif_wake_queue(adapter->netdev);
2850
2851         /* fire a link change interrupt to start the watchdog */
2852         ew32(ICS, E1000_ICS_LSC);
2853         return 0;
2854 }
2855
2856 void e1000e_down(struct e1000_adapter *adapter)
2857 {
2858         struct net_device *netdev = adapter->netdev;
2859         struct e1000_hw *hw = &adapter->hw;
2860         u32 tctl, rctl;
2861
2862         /*
2863          * signal that we're down so the interrupt handler does not
2864          * reschedule our watchdog timer
2865          */
2866         set_bit(__E1000_DOWN, &adapter->state);
2867
2868         /* disable receives in the hardware */
2869         rctl = er32(RCTL);
2870         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2871         /* flush and sleep below */
2872
2873         netif_stop_queue(netdev);
2874
2875         /* disable transmits in the hardware */
2876         tctl = er32(TCTL);
2877         tctl &= ~E1000_TCTL_EN;
2878         ew32(TCTL, tctl);
2879         /* flush both disables and wait for them to finish */
2880         e1e_flush();
2881         msleep(10);
2882
2883         napi_disable(&adapter->napi);
2884         e1000_irq_disable(adapter);
2885
2886         del_timer_sync(&adapter->watchdog_timer);
2887         del_timer_sync(&adapter->phy_info_timer);
2888
2889         netdev->tx_queue_len = adapter->tx_queue_len;
2890         netif_carrier_off(netdev);
2891         adapter->link_speed = 0;
2892         adapter->link_duplex = 0;
2893
2894         if (!pci_channel_offline(adapter->pdev))
2895                 e1000e_reset(adapter);
2896         e1000_clean_tx_ring(adapter);
2897         e1000_clean_rx_ring(adapter);
2898
2899         if (adapter->flags & FLAG_HAS_ERT)
2900                 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
2901                                           adapter->netdev->name);
2902
2903         /*
2904          * TODO: for power management, we could drop the link and
2905          * pci_disable_device here.
2906          */
2907 }
2908
2909 void e1000e_reinit_locked(struct e1000_adapter *adapter)
2910 {
2911         might_sleep();
2912         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2913                 msleep(1);
2914         e1000e_down(adapter);
2915         e1000e_up(adapter);
2916         clear_bit(__E1000_RESETTING, &adapter->state);
2917 }
2918
2919 /**
2920  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2921  * @adapter: board private structure to initialize
2922  *
2923  * e1000_sw_init initializes the Adapter private data structure.
2924  * Fields are initialized based on PCI device information and
2925  * OS network device settings (MTU size).
2926  **/
2927 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2928 {
2929         struct net_device *netdev = adapter->netdev;
2930
2931         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2932         adapter->rx_ps_bsize0 = 128;
2933         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2934         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2935
2936         e1000e_set_interrupt_capability(adapter);
2937
2938         if (e1000_alloc_queues(adapter))
2939                 return -ENOMEM;
2940
2941         /* Explicitly disable IRQ since the NIC can be in any state. */
2942         e1000_irq_disable(adapter);
2943
2944         set_bit(__E1000_DOWN, &adapter->state);
2945         return 0;
2946 }
2947
2948 /**
2949  * e1000_intr_msi_test - Interrupt Handler
2950  * @irq: interrupt number
2951  * @data: pointer to a network interface device structure
2952  **/
2953 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2954 {
2955         struct net_device *netdev = data;
2956         struct e1000_adapter *adapter = netdev_priv(netdev);
2957         struct e1000_hw *hw = &adapter->hw;
2958         u32 icr = er32(ICR);
2959
2960         e_dbg("icr is %08X\n", icr);
2961         if (icr & E1000_ICR_RXSEQ) {
2962                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2963                 wmb();
2964         }
2965
2966         return IRQ_HANDLED;
2967 }
2968
2969 /**
2970  * e1000_test_msi_interrupt - Returns 0 for successful test
2971  * @adapter: board private struct
2972  *
2973  * code flow taken from tg3.c
2974  **/
2975 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2976 {
2977         struct net_device *netdev = adapter->netdev;
2978         struct e1000_hw *hw = &adapter->hw;
2979         int err;
2980
2981         /* poll_enable hasn't been called yet, so don't need disable */
2982         /* clear any pending events */
2983         er32(ICR);
2984
2985         /* free the real vector and request a test handler */
2986         e1000_free_irq(adapter);
2987         e1000e_reset_interrupt_capability(adapter);
2988
2989         /* Assume that the test fails, if it succeeds then the test
2990          * MSI irq handler will unset this flag */
2991         adapter->flags |= FLAG_MSI_TEST_FAILED;
2992
2993         err = pci_enable_msi(adapter->pdev);
2994         if (err)
2995                 goto msi_test_failed;
2996
2997         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
2998                           netdev->name, netdev);
2999         if (err) {
3000                 pci_disable_msi(adapter->pdev);
3001                 goto msi_test_failed;
3002         }
3003
3004         wmb();
3005
3006         e1000_irq_enable(adapter);
3007
3008         /* fire an unusual interrupt on the test handler */
3009         ew32(ICS, E1000_ICS_RXSEQ);
3010         e1e_flush();
3011         msleep(50);
3012
3013         e1000_irq_disable(adapter);
3014
3015         rmb();
3016
3017         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3018                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3019                 err = -EIO;
3020                 e_info("MSI interrupt test failed!\n");
3021         }
3022
3023         free_irq(adapter->pdev->irq, netdev);
3024         pci_disable_msi(adapter->pdev);
3025
3026         if (err == -EIO)
3027                 goto msi_test_failed;
3028
3029         /* okay so the test worked, restore settings */
3030         e_dbg("MSI interrupt test succeeded!\n");
3031 msi_test_failed:
3032         e1000e_set_interrupt_capability(adapter);
3033         e1000_request_irq(adapter);
3034         return err;
3035 }
3036
3037 /**
3038  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3039  * @adapter: board private struct
3040  *
3041  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3042  **/
3043 static int e1000_test_msi(struct e1000_adapter *adapter)
3044 {
3045         int err;
3046         u16 pci_cmd;
3047
3048         if (!(adapter->flags & FLAG_MSI_ENABLED))
3049                 return 0;
3050
3051         /* disable SERR in case the MSI write causes a master abort */
3052         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3053         pci_write_config_word(adapter->pdev, PCI_COMMAND,
3054                               pci_cmd & ~PCI_COMMAND_SERR);
3055
3056         err = e1000_test_msi_interrupt(adapter);
3057
3058         /* restore previous setting of command word */
3059         pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3060
3061         /* success ! */
3062         if (!err)
3063                 return 0;
3064
3065         /* EIO means MSI test failed */
3066         if (err != -EIO)
3067                 return err;
3068
3069         /* back to INTx mode */
3070         e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3071
3072         e1000_free_irq(adapter);
3073
3074         err = e1000_request_irq(adapter);
3075
3076         return err;
3077 }
3078
3079 /**
3080  * e1000_open - Called when a network interface is made active
3081  * @netdev: network interface device structure
3082  *
3083  * Returns 0 on success, negative value on failure
3084  *
3085  * The open entry point is called when a network interface is made
3086  * active by the system (IFF_UP).  At this point all resources needed
3087  * for transmit and receive operations are allocated, the interrupt
3088  * handler is registered with the OS, the watchdog timer is started,
3089  * and the stack is notified that the interface is ready.
3090  **/
3091 static int e1000_open(struct net_device *netdev)
3092 {
3093         struct e1000_adapter *adapter = netdev_priv(netdev);
3094         struct e1000_hw *hw = &adapter->hw;
3095         int err;
3096
3097         /* disallow open during test */
3098         if (test_bit(__E1000_TESTING, &adapter->state))
3099                 return -EBUSY;
3100
3101         netif_carrier_off(netdev);
3102
3103         /* allocate transmit descriptors */
3104         err = e1000e_setup_tx_resources(adapter);
3105         if (err)
3106                 goto err_setup_tx;
3107
3108         /* allocate receive descriptors */
3109         err = e1000e_setup_rx_resources(adapter);
3110         if (err)
3111                 goto err_setup_rx;
3112
3113         e1000e_power_up_phy(adapter);
3114
3115         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3116         if ((adapter->hw.mng_cookie.status &
3117              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3118                 e1000_update_mng_vlan(adapter);
3119
3120         /*
3121          * If AMT is enabled, let the firmware know that the network
3122          * interface is now open
3123          */
3124         if (adapter->flags & FLAG_HAS_AMT)
3125                 e1000_get_hw_control(adapter);
3126
3127         /*
3128          * before we allocate an interrupt, we must be ready to handle it.
3129          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3130          * as soon as we call pci_request_irq, so we have to setup our
3131          * clean_rx handler before we do so.
3132          */
3133         e1000_configure(adapter);
3134
3135         err = e1000_request_irq(adapter);
3136         if (err)
3137                 goto err_req_irq;
3138
3139         /*
3140          * Work around PCIe errata with MSI interrupts causing some chipsets to
3141          * ignore e1000e MSI messages, which means we need to test our MSI
3142          * interrupt now
3143          */
3144         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3145                 err = e1000_test_msi(adapter);
3146                 if (err) {
3147                         e_err("Interrupt allocation failed\n");
3148                         goto err_req_irq;
3149                 }
3150         }
3151
3152         /* From here on the code is the same as e1000e_up() */
3153         clear_bit(__E1000_DOWN, &adapter->state);
3154
3155         napi_enable(&adapter->napi);
3156
3157         e1000_irq_enable(adapter);
3158
3159         netif_start_queue(netdev);
3160
3161         /* fire a link status change interrupt to start the watchdog */
3162         ew32(ICS, E1000_ICS_LSC);
3163
3164         return 0;
3165
3166 err_req_irq:
3167         e1000_release_hw_control(adapter);
3168         e1000_power_down_phy(adapter);
3169         e1000e_free_rx_resources(adapter);
3170 err_setup_rx:
3171         e1000e_free_tx_resources(adapter);
3172 err_setup_tx:
3173         e1000e_reset(adapter);
3174
3175         return err;
3176 }
3177
3178 /**
3179  * e1000_close - Disables a network interface
3180  * @netdev: network interface device structure
3181  *
3182  * Returns 0, this is not allowed to fail
3183  *
3184  * The close entry point is called when an interface is de-activated
3185  * by the OS.  The hardware is still under the drivers control, but
3186  * needs to be disabled.  A global MAC reset is issued to stop the
3187  * hardware, and all transmit and receive resources are freed.
3188  **/
3189 static int e1000_close(struct net_device *netdev)
3190 {
3191         struct e1000_adapter *adapter = netdev_priv(netdev);
3192
3193         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3194         e1000e_down(adapter);
3195         e1000_power_down_phy(adapter);
3196         e1000_free_irq(adapter);
3197
3198         e1000e_free_tx_resources(adapter);
3199         e1000e_free_rx_resources(adapter);
3200
3201         /*
3202          * kill manageability vlan ID if supported, but not if a vlan with
3203          * the same ID is registered on the host OS (let 8021q kill it)
3204          */
3205         if ((adapter->hw.mng_cookie.status &
3206                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3207              !(adapter->vlgrp &&
3208                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3209                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3210
3211         /*
3212          * If AMT is enabled, let the firmware know that the network
3213          * interface is now closed
3214          */
3215         if (adapter->flags & FLAG_HAS_AMT)
3216                 e1000_release_hw_control(adapter);
3217
3218         return 0;
3219 }
3220 /**
3221  * e1000_set_mac - Change the Ethernet Address of the NIC
3222  * @netdev: network interface device structure
3223  * @p: pointer to an address structure
3224  *
3225  * Returns 0 on success, negative on failure
3226  **/
3227 static int e1000_set_mac(struct net_device *netdev, void *p)
3228 {
3229         struct e1000_adapter *adapter = netdev_priv(netdev);
3230         struct sockaddr *addr = p;
3231
3232         if (!is_valid_ether_addr(addr->sa_data))
3233                 return -EADDRNOTAVAIL;
3234
3235         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3236         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3237
3238         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3239
3240         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3241                 /* activate the work around */
3242                 e1000e_set_laa_state_82571(&adapter->hw, 1);
3243
3244                 /*
3245                  * Hold a copy of the LAA in RAR[14] This is done so that
3246                  * between the time RAR[0] gets clobbered  and the time it
3247                  * gets fixed (in e1000_watchdog), the actual LAA is in one
3248                  * of the RARs and no incoming packets directed to this port
3249                  * are dropped. Eventually the LAA will be in RAR[0] and
3250                  * RAR[14]
3251                  */
3252                 e1000e_rar_set(&adapter->hw,
3253                               adapter->hw.mac.addr,
3254                               adapter->hw.mac.rar_entry_count - 1);
3255         }
3256
3257         return 0;
3258 }
3259
3260 /**
3261  * e1000e_update_phy_task - work thread to update phy
3262  * @work: pointer to our work struct
3263  *
3264  * this worker thread exists because we must acquire a
3265  * semaphore to read the phy, which we could msleep while
3266  * waiting for it, and we can't msleep in a timer.
3267  **/
3268 static void e1000e_update_phy_task(struct work_struct *work)
3269 {
3270         struct e1000_adapter *adapter = container_of(work,
3271                                         struct e1000_adapter, update_phy_task);
3272         e1000_get_phy_info(&adapter->hw);
3273 }
3274
3275 /*
3276  * Need to wait a few seconds after link up to get diagnostic information from
3277  * the phy
3278  */
3279 static void e1000_update_phy_info(unsigned long data)
3280 {
3281         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3282         schedule_work(&adapter->update_phy_task);
3283 }
3284
3285 /**
3286  * e1000e_update_stats - Update the board statistics counters
3287  * @adapter: board private structure
3288  **/
3289 void e1000e_update_stats(struct e1000_adapter *adapter)
3290 {
3291         struct net_device *netdev = adapter->netdev;
3292         struct e1000_hw *hw = &adapter->hw;
3293         struct pci_dev *pdev = adapter->pdev;
3294         u16 phy_data;
3295
3296         /*
3297          * Prevent stats update while adapter is being reset, or if the pci
3298          * connection is down.
3299          */
3300         if (adapter->link_speed == 0)
3301                 return;
3302         if (pci_channel_offline(pdev))
3303                 return;
3304
3305         adapter->stats.crcerrs += er32(CRCERRS);
3306         adapter->stats.gprc += er32(GPRC);
3307         adapter->stats.gorc += er32(GORCL);
3308         er32(GORCH); /* Clear gorc */
3309         adapter->stats.bprc += er32(BPRC);
3310         adapter->stats.mprc += er32(MPRC);
3311         adapter->stats.roc += er32(ROC);
3312
3313         adapter->stats.mpc += er32(MPC);
3314         if ((hw->phy.type == e1000_phy_82578) ||
3315             (hw->phy.type == e1000_phy_82577)) {
3316                 e1e_rphy(hw, HV_SCC_UPPER, &phy_data);
3317                 e1e_rphy(hw, HV_SCC_LOWER, &phy_data);
3318                 adapter->stats.scc += phy_data;
3319
3320                 e1e_rphy(hw, HV_ECOL_UPPER, &phy_data);
3321                 e1e_rphy(hw, HV_ECOL_LOWER, &phy_data);
3322                 adapter->stats.ecol += phy_data;
3323
3324                 e1e_rphy(hw, HV_MCC_UPPER, &phy_data);
3325                 e1e_rphy(hw, HV_MCC_LOWER, &phy_data);
3326                 adapter->stats.mcc += phy_data;
3327
3328                 e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data);
3329                 e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data);
3330                 adapter->stats.latecol += phy_data;
3331
3332                 e1e_rphy(hw, HV_DC_UPPER, &phy_data);
3333                 e1e_rphy(hw, HV_DC_LOWER, &phy_data);
3334                 adapter->stats.dc += phy_data;
3335         } else {
3336                 adapter->stats.scc += er32(SCC);
3337                 adapter->stats.ecol += er32(ECOL);
3338                 adapter->stats.mcc += er32(MCC);
3339                 adapter->stats.latecol += er32(LATECOL);
3340                 adapter->stats.dc += er32(DC);
3341         }
3342         adapter->stats.xonrxc += er32(XONRXC);
3343         adapter->stats.xontxc += er32(XONTXC);
3344         adapter->stats.xoffrxc += er32(XOFFRXC);
3345         adapter->stats.xofftxc += er32(XOFFTXC);
3346         adapter->stats.gptc += er32(GPTC);
3347         adapter->stats.gotc += er32(GOTCL);
3348         er32(GOTCH); /* Clear gotc */
3349         adapter->stats.rnbc += er32(RNBC);
3350         adapter->stats.ruc += er32(RUC);
3351
3352         adapter->stats.mptc += er32(MPTC);
3353         adapter->stats.bptc += er32(BPTC);
3354
3355         /* used for adaptive IFS */
3356
3357         hw->mac.tx_packet_delta = er32(TPT);
3358         adapter->stats.tpt += hw->mac.tx_packet_delta;
3359         if ((hw->phy.type == e1000_phy_82578) ||
3360             (hw->phy.type == e1000_phy_82577)) {
3361                 e1e_rphy(hw, HV_COLC_UPPER, &phy_data);
3362                 e1e_rphy(hw, HV_COLC_LOWER, &phy_data);
3363                 hw->mac.collision_delta = phy_data;
3364         } else {
3365                 hw->mac.collision_delta = er32(COLC);
3366         }
3367         adapter->stats.colc += hw->mac.collision_delta;
3368
3369         adapter->stats.algnerrc += er32(ALGNERRC);
3370         adapter->stats.rxerrc += er32(RXERRC);
3371         if ((hw->phy.type == e1000_phy_82578) ||
3372             (hw->phy.type == e1000_phy_82577)) {
3373                 e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data);
3374                 e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data);
3375                 adapter->stats.tncrs += phy_data;
3376         } else {
3377                 if ((hw->mac.type != e1000_82574) &&
3378                     (hw->mac.type != e1000_82583))
3379                         adapter->stats.tncrs += er32(TNCRS);
3380         }
3381         adapter->stats.cexterr += er32(CEXTERR);
3382         adapter->stats.tsctc += er32(TSCTC);
3383         adapter->stats.tsctfc += er32(TSCTFC);
3384
3385         /* Fill out the OS statistics structure */
3386         netdev->stats.multicast = adapter->stats.mprc;
3387         netdev->stats.collisions = adapter->stats.colc;
3388
3389         /* Rx Errors */
3390
3391         /*
3392          * RLEC on some newer hardware can be incorrect so build
3393          * our own version based on RUC and ROC
3394          */
3395         netdev->stats.rx_errors = adapter->stats.rxerrc +
3396                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3397                 adapter->stats.ruc + adapter->stats.roc +
3398                 adapter->stats.cexterr;
3399         netdev->stats.rx_length_errors = adapter->stats.ruc +
3400                                               adapter->stats.roc;
3401         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3402         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3403         netdev->stats.rx_missed_errors = adapter->stats.mpc;
3404
3405         /* Tx Errors */
3406         netdev->stats.tx_errors = adapter->stats.ecol +
3407                                        adapter->stats.latecol;
3408         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3409         netdev->stats.tx_window_errors = adapter->stats.latecol;
3410         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3411
3412         /* Tx Dropped needs to be maintained elsewhere */
3413
3414         /* Management Stats */
3415         adapter->stats.mgptc += er32(MGTPTC);
3416         adapter->stats.mgprc += er32(MGTPRC);
3417         adapter->stats.mgpdc += er32(MGTPDC);
3418 }
3419
3420 /**
3421  * e1000_phy_read_status - Update the PHY register status snapshot
3422  * @adapter: board private structure
3423  **/
3424 static void e1000_phy_read_status(struct e1000_adapter *adapter)
3425 {
3426         struct e1000_hw *hw = &adapter->hw;
3427         struct e1000_phy_regs *phy = &adapter->phy_regs;
3428         int ret_val;
3429
3430         if ((er32(STATUS) & E1000_STATUS_LU) &&
3431             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3432                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3433                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3434                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3435                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3436                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3437                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3438                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3439                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3440                 if (ret_val)
3441                         e_warn("Error reading PHY register\n");
3442         } else {
3443                 /*
3444                  * Do not read PHY registers if link is not up
3445                  * Set values to typical power-on defaults
3446                  */
3447                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3448                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3449                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3450                              BMSR_ERCAP);
3451                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3452                                   ADVERTISE_ALL | ADVERTISE_CSMA);
3453                 phy->lpa = 0;
3454                 phy->expansion = EXPANSION_ENABLENPAGE;
3455                 phy->ctrl1000 = ADVERTISE_1000FULL;
3456                 phy->stat1000 = 0;
3457                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3458         }
3459 }
3460
3461 static void e1000_print_link_info(struct e1000_adapter *adapter)
3462 {
3463         struct e1000_hw *hw = &adapter->hw;
3464         u32 ctrl = er32(CTRL);
3465
3466         /* Link status message must follow this format for user tools */
3467         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3468                "Flow Control: %s\n",
3469                adapter->netdev->name,
3470                adapter->link_speed,
3471                (adapter->link_duplex == FULL_DUPLEX) ?
3472                                 "Full Duplex" : "Half Duplex",
3473                ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3474                                 "RX/TX" :
3475                ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3476                ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
3477 }
3478
3479 bool e1000_has_link(struct e1000_adapter *adapter)
3480 {
3481         struct e1000_hw *hw = &adapter->hw;
3482         bool link_active = 0;
3483         s32 ret_val = 0;
3484
3485         /*
3486          * get_link_status is set on LSC (link status) interrupt or
3487          * Rx sequence error interrupt.  get_link_status will stay
3488          * false until the check_for_link establishes link
3489          * for copper adapters ONLY
3490          */
3491         switch (hw->phy.media_type) {
3492         case e1000_media_type_copper:
3493                 if (hw->mac.get_link_status) {
3494                         ret_val = hw->mac.ops.check_for_link(hw);
3495                         link_active = !hw->mac.get_link_status;
3496                 } else {
3497                         link_active = 1;
3498                 }
3499                 break;
3500         case e1000_media_type_fiber:
3501                 ret_val = hw->mac.ops.check_for_link(hw);
3502                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3503                 break;
3504         case e1000_media_type_internal_serdes:
3505                 ret_val = hw->mac.ops.check_for_link(hw);
3506                 link_active = adapter->hw.mac.serdes_has_link;
3507                 break;
3508         default:
3509         case e1000_media_type_unknown:
3510                 break;
3511         }
3512
3513         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3514             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3515                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3516                 e_info("Gigabit has been disabled, downgrading speed\n");
3517         }
3518
3519         return link_active;
3520 }
3521
3522 static void e1000e_enable_receives(struct e1000_adapter *adapter)
3523 {
3524         /* make sure the receive unit is started */
3525         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3526             (adapter->flags & FLAG_RX_RESTART_NOW)) {
3527                 struct e1000_hw *hw = &adapter->hw;
3528                 u32 rctl = er32(RCTL);
3529                 ew32(RCTL, rctl | E1000_RCTL_EN);
3530                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3531         }
3532 }
3533
3534 /**
3535  * e1000_watchdog - Timer Call-back
3536  * @data: pointer to adapter cast into an unsigned long
3537  **/
3538 static void e1000_watchdog(unsigned long data)
3539 {
3540         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3541
3542         /* Do the rest outside of interrupt context */
3543         schedule_work(&adapter->watchdog_task);
3544
3545         /* TODO: make this use queue_delayed_work() */
3546 }
3547
3548 static void e1000_watchdog_task(struct work_struct *work)
3549 {
3550         struct e1000_adapter *adapter = container_of(work,
3551                                         struct e1000_adapter, watchdog_task);
3552         struct net_device *netdev = adapter->netdev;
3553         struct e1000_mac_info *mac = &adapter->hw.mac;
3554         struct e1000_phy_info *phy = &adapter->hw.phy;
3555         struct e1000_ring *tx_ring = adapter->tx_ring;
3556         struct e1000_hw *hw = &adapter->hw;
3557         u32 link, tctl;
3558         int tx_pending = 0;
3559
3560         link = e1000_has_link(adapter);
3561         if ((netif_carrier_ok(netdev)) && link) {
3562                 e1000e_enable_receives(adapter);
3563                 goto link_up;
3564         }
3565
3566         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3567             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3568                 e1000_update_mng_vlan(adapter);
3569
3570         if (link) {
3571                 if (!netif_carrier_ok(netdev)) {
3572                         bool txb2b = 1;
3573                         /* update snapshot of PHY registers on LSC */
3574                         e1000_phy_read_status(adapter);
3575                         mac->ops.get_link_up_info(&adapter->hw,
3576                                                    &adapter->link_speed,
3577                                                    &adapter->link_duplex);
3578                         e1000_print_link_info(adapter);
3579                         /*
3580                          * On supported PHYs, check for duplex mismatch only
3581                          * if link has autonegotiated at 10/100 half
3582                          */
3583                         if ((hw->phy.type == e1000_phy_igp_3 ||
3584                              hw->phy.type == e1000_phy_bm) &&
3585                             (hw->mac.autoneg == true) &&
3586                             (adapter->link_speed == SPEED_10 ||
3587                              adapter->link_speed == SPEED_100) &&
3588                             (adapter->link_duplex == HALF_DUPLEX)) {
3589                                 u16 autoneg_exp;
3590
3591                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3592
3593                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3594                                         e_info("Autonegotiated half duplex but"
3595                                                " link partner cannot autoneg. "
3596                                                " Try forcing full duplex if "
3597                                                "link gets many collisions.\n");
3598                         }
3599
3600                         /*
3601                          * tweak tx_queue_len according to speed/duplex
3602                          * and adjust the timeout factor
3603                          */
3604                         netdev->tx_queue_len = adapter->tx_queue_len;
3605                         adapter->tx_timeout_factor = 1;
3606                         switch (adapter->link_speed) {
3607                         case SPEED_10:
3608                                 txb2b = 0;
3609                                 netdev->tx_queue_len = 10;
3610                                 adapter->tx_timeout_factor = 16;
3611                                 break;
3612                         case SPEED_100:
3613                                 txb2b = 0;
3614                                 netdev->tx_queue_len = 100;
3615                                 /* maybe add some timeout factor ? */
3616                                 break;
3617                         }
3618
3619                         /*
3620                          * workaround: re-program speed mode bit after
3621                          * link-up event
3622                          */
3623                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3624                             !txb2b) {
3625                                 u32 tarc0;
3626                                 tarc0 = er32(TARC(0));
3627                                 tarc0 &= ~SPEED_MODE_BIT;
3628                                 ew32(TARC(0), tarc0);
3629                         }
3630
3631                         /*
3632                          * disable TSO for pcie and 10/100 speeds, to avoid
3633                          * some hardware issues
3634                          */
3635                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
3636                                 switch (adapter->link_speed) {
3637                                 case SPEED_10:
3638                                 case SPEED_100:
3639                                         e_info("10/100 speed: disabling TSO\n");
3640                                         netdev->features &= ~NETIF_F_TSO;
3641                                         netdev->features &= ~NETIF_F_TSO6;
3642                                         break;
3643                                 case SPEED_1000:
3644                                         netdev->features |= NETIF_F_TSO;
3645                                         netdev->features |= NETIF_F_TSO6;
3646                                         break;
3647                                 default:
3648                                         /* oops */
3649                                         break;
3650                                 }
3651                         }
3652
3653                         /*
3654                          * enable transmits in the hardware, need to do this
3655                          * after setting TARC(0)
3656                          */
3657                         tctl = er32(TCTL);
3658                         tctl |= E1000_TCTL_EN;
3659                         ew32(TCTL, tctl);
3660
3661                         /*
3662                          * Perform any post-link-up configuration before
3663                          * reporting link up.
3664                          */
3665                         if (phy->ops.cfg_on_link_up)
3666                                 phy->ops.cfg_on_link_up(hw);
3667
3668                         netif_carrier_on(netdev);
3669
3670                         if (!test_bit(__E1000_DOWN, &adapter->state))
3671                                 mod_timer(&adapter->phy_info_timer,
3672                                           round_jiffies(jiffies + 2 * HZ));
3673                 }
3674         } else {
3675                 if (netif_carrier_ok(netdev)) {
3676                         adapter->link_speed = 0;
3677                         adapter->link_duplex = 0;
3678                         /* Link status message must follow this format */
3679                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
3680                                adapter->netdev->name);
3681                         netif_carrier_off(netdev);
3682                         if (!test_bit(__E1000_DOWN, &adapter->state))
3683                                 mod_timer(&adapter->phy_info_timer,
3684                                           round_jiffies(jiffies + 2 * HZ));
3685
3686                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3687                                 schedule_work(&adapter->reset_task);
3688                 }
3689         }
3690
3691 link_up:
3692         e1000e_update_stats(adapter);
3693
3694         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3695         adapter->tpt_old = adapter->stats.tpt;
3696         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3697         adapter->colc_old = adapter->stats.colc;
3698
3699         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3700         adapter->gorc_old = adapter->stats.gorc;
3701         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3702         adapter->gotc_old = adapter->stats.gotc;
3703
3704         e1000e_update_adaptive(&adapter->hw);
3705
3706         if (!netif_carrier_ok(netdev)) {
3707                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3708                                tx_ring->count);
3709                 if (tx_pending) {
3710                         /*
3711                          * We've lost link, so the controller stops DMA,
3712                          * but we've got queued Tx work that's never going
3713                          * to get done, so reset controller to flush Tx.
3714                          * (Do the reset outside of interrupt context).
3715                          */
3716                         adapter->tx_timeout_count++;
3717                         schedule_work(&adapter->reset_task);
3718                         /* return immediately since reset is imminent */
3719                         return;
3720                 }
3721         }
3722
3723         /* Cause software interrupt to ensure Rx ring is cleaned */
3724         if (adapter->msix_entries)
3725                 ew32(ICS, adapter->rx_ring->ims_val);
3726         else
3727                 ew32(ICS, E1000_ICS_RXDMT0);
3728
3729         /* Force detection of hung controller every watchdog period */
3730         adapter->detect_tx_hung = 1;
3731
3732         /*
3733          * With 82571 controllers, LAA may be overwritten due to controller
3734          * reset from the other port. Set the appropriate LAA in RAR[0]
3735          */
3736         if (e1000e_get_laa_state_82571(hw))
3737                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3738
3739         /* Reset the timer */
3740         if (!test_bit(__E1000_DOWN, &adapter->state))
3741                 mod_timer(&adapter->watchdog_timer,
3742                           round_jiffies(jiffies + 2 * HZ));
3743 }
3744
3745 #define E1000_TX_FLAGS_CSUM             0x00000001
3746 #define E1000_TX_FLAGS_VLAN             0x00000002
3747 #define E1000_TX_FLAGS_TSO              0x00000004
3748 #define E1000_TX_FLAGS_IPV4             0x00000008
3749 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
3750 #define E1000_TX_FLAGS_VLAN_SHIFT       16
3751
3752 static int e1000_tso(struct e1000_adapter *adapter,
3753                      struct sk_buff *skb)
3754 {
3755         struct e1000_ring *tx_ring = adapter->tx_ring;
3756         struct e1000_context_desc *context_desc;
3757         struct e1000_buffer *buffer_info;
3758         unsigned int i;
3759         u32 cmd_length = 0;
3760         u16 ipcse = 0, tucse, mss;
3761         u8 ipcss, ipcso, tucss, tucso, hdr_len;
3762         int err;
3763
3764         if (!skb_is_gso(skb))
3765                 return 0;
3766
3767         if (skb_header_cloned(skb)) {
3768                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3769                 if (err)
3770                         return err;
3771         }
3772
3773         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3774         mss = skb_shinfo(skb)->gso_size;
3775         if (skb->protocol == htons(ETH_P_IP)) {
3776                 struct iphdr *iph = ip_hdr(skb);
3777                 iph->tot_len = 0;
3778                 iph->check = 0;
3779                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
3780                                                          0, IPPROTO_TCP, 0);
3781                 cmd_length = E1000_TXD_CMD_IP;
3782                 ipcse = skb_transport_offset(skb) - 1;
3783         } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3784                 ipv6_hdr(skb)->payload_len = 0;
3785                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3786                                                        &ipv6_hdr(skb)->daddr,
3787                                                        0, IPPROTO_TCP, 0);
3788                 ipcse = 0;
3789         }
3790         ipcss = skb_network_offset(skb);
3791         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3792         tucss = skb_transport_offset(skb);
3793         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3794         tucse = 0;
3795
3796         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3797                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3798
3799         i = tx_ring->next_to_use;
3800         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3801         buffer_info = &tx_ring->buffer_info[i];
3802
3803         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3804         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3805         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3806         context_desc->upper_setup.tcp_fields.tucss = tucss;
3807         context_desc->upper_setup.tcp_fields.tucso = tucso;
3808         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3809         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3810         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3811         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3812
3813         buffer_info->time_stamp = jiffies;
3814         buffer_info->next_to_watch = i;
3815
3816         i++;
3817         if (i == tx_ring->count)
3818                 i = 0;
3819         tx_ring->next_to_use = i;
3820
3821         return 1;
3822 }
3823
3824 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3825 {
3826         struct e1000_ring *tx_ring = adapter->tx_ring;
3827         struct e1000_context_desc *context_desc;
3828         struct e1000_buffer *buffer_info;
3829         unsigned int i;
3830         u8 css;
3831         u32 cmd_len = E1000_TXD_CMD_DEXT;
3832         __be16 protocol;
3833
3834         if (skb->ip_summed != CHECKSUM_PARTIAL)
3835                 return 0;
3836
3837         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
3838                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
3839         else
3840                 protocol = skb->protocol;
3841
3842         switch (protocol) {
3843         case cpu_to_be16(ETH_P_IP):
3844                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3845                         cmd_len |= E1000_TXD_CMD_TCP;
3846                 break;
3847         case cpu_to_be16(ETH_P_IPV6):
3848                 /* XXX not handling all IPV6 headers */
3849                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3850                         cmd_len |= E1000_TXD_CMD_TCP;
3851                 break;
3852         default:
3853                 if (unlikely(net_ratelimit()))
3854                         e_warn("checksum_partial proto=%x!\n",
3855                                be16_to_cpu(protocol));
3856                 break;
3857         }
3858
3859         css = skb_transport_offset(skb);
3860
3861         i = tx_ring->next_to_use;
3862         buffer_info = &tx_ring->buffer_info[i];
3863         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3864
3865         context_desc->lower_setup.ip_config = 0;
3866         context_desc->upper_setup.tcp_fields.tucss = css;
3867         context_desc->upper_setup.tcp_fields.tucso =
3868                                 css + skb->csum_offset;
3869         context_desc->upper_setup.tcp_fields.tucse = 0;
3870         context_desc->tcp_seg_setup.data = 0;
3871         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
3872
3873         buffer_info->time_stamp = jiffies;
3874         buffer_info->next_to_watch = i;
3875
3876         i++;
3877         if (i == tx_ring->count)
3878                 i = 0;
3879         tx_ring->next_to_use = i;
3880
3881         return 1;
3882 }
3883
3884 #define E1000_MAX_PER_TXD       8192
3885 #define E1000_MAX_TXD_PWR       12
3886
3887 static int e1000_tx_map(struct e1000_adapter *adapter,
3888                         struct sk_buff *skb, unsigned int first,
3889                         unsigned int max_per_txd, unsigned int nr_frags,
3890                         unsigned int mss)
3891 {
3892         struct e1000_ring *tx_ring = adapter->tx_ring;
3893         struct e1000_buffer *buffer_info;
3894         unsigned int len = skb_headlen(skb);
3895         unsigned int offset, size, count = 0, i;
3896         unsigned int f;
3897         dma_addr_t *map;
3898
3899         i = tx_ring->next_to_use;
3900
3901         if (skb_dma_map(&adapter->pdev->dev, skb, DMA_TO_DEVICE)) {
3902                 dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
3903                 adapter->tx_dma_failed++;
3904                 return 0;
3905         }
3906
3907         map = skb_shinfo(skb)->dma_maps;
3908         offset = 0;
3909
3910         while (len) {
3911                 buffer_info = &tx_ring->buffer_info[i];
3912                 size = min(len, max_per_txd);
3913
3914                 buffer_info->length = size;
3915                 buffer_info->time_stamp = jiffies;
3916                 buffer_info->next_to_watch = i;
3917                 buffer_info->dma = skb_shinfo(skb)->dma_head + offset;
3918                 count++;
3919
3920                 len -= size;
3921                 offset += size;
3922
3923                 if (len) {
3924                         i++;
3925                         if (i == tx_ring->count)
3926                                 i = 0;
3927                 }
3928         }
3929
3930         for (f = 0; f < nr_frags; f++) {
3931                 struct skb_frag_struct *frag;
3932
3933                 frag = &skb_shinfo(skb)->frags[f];
3934                 len = frag->size;
3935                 offset = 0;
3936
3937                 while (len) {
3938                         i++;
3939                         if (i == tx_ring->count)
3940                                 i = 0;
3941
3942                         buffer_info = &tx_ring->buffer_info[i];
3943                         size = min(len, max_per_txd);
3944
3945                         buffer_info->length = size;
3946                         buffer_info->time_stamp = jiffies;
3947                         buffer_info->next_to_watch = i;
3948                         buffer_info->dma = map[f] + offset;
3949
3950                         len -= size;
3951                         offset += size;
3952                         count++;
3953                 }
3954         }
3955
3956         tx_ring->buffer_info[i].skb = skb;
3957         tx_ring->buffer_info[first].next_to_watch = i;
3958
3959         return count;
3960 }
3961
3962 static void e1000_tx_queue(struct e1000_adapter *adapter,
3963                            int tx_flags, int count)
3964 {
3965         struct e1000_ring *tx_ring = adapter->tx_ring;
3966         struct e1000_tx_desc *tx_desc = NULL;
3967         struct e1000_buffer *buffer_info;
3968         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3969         unsigned int i;
3970
3971         if (tx_flags & E1000_TX_FLAGS_TSO) {
3972                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3973                              E1000_TXD_CMD_TSE;
3974                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3975
3976                 if (tx_flags & E1000_TX_FLAGS_IPV4)
3977                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3978         }
3979
3980         if (tx_flags & E1000_TX_FLAGS_CSUM) {
3981                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3982                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3983         }
3984
3985         if (tx_flags & E1000_TX_FLAGS_VLAN) {
3986                 txd_lower |= E1000_TXD_CMD_VLE;
3987                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3988         }
3989
3990         i = tx_ring->next_to_use;
3991
3992         while (count--) {
3993                 buffer_info = &tx_ring->buffer_info[i];
3994                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3995                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3996                 tx_desc->lower.data =
3997                         cpu_to_le32(txd_lower | buffer_info->length);
3998                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3999
4000                 i++;
4001                 if (i == tx_ring->count)
4002                         i = 0;
4003         }
4004
4005         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4006
4007         /*
4008          * Force memory writes to complete before letting h/w
4009          * know there are new descriptors to fetch.  (Only
4010          * applicable for weak-ordered memory model archs,
4011          * such as IA-64).
4012          */
4013         wmb();
4014
4015         tx_ring->next_to_use = i;
4016         writel(i, adapter->hw.hw_addr + tx_ring->tail);
4017         /*
4018          * we need this if more than one processor can write to our tail
4019          * at a time, it synchronizes IO on IA64/Altix systems
4020          */
4021         mmiowb();
4022 }
4023
4024 #define MINIMUM_DHCP_PACKET_SIZE 282
4025 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4026                                     struct sk_buff *skb)
4027 {
4028         struct e1000_hw *hw =  &adapter->hw;
4029         u16 length, offset;
4030
4031         if (vlan_tx_tag_present(skb)) {
4032                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id)
4033                     && (adapter->hw.mng_cookie.status &
4034                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4035                         return 0;
4036         }
4037
4038         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4039                 return 0;
4040
4041         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4042                 return 0;
4043
4044         {
4045                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4046                 struct udphdr *udp;
4047
4048                 if (ip->protocol != IPPROTO_UDP)
4049                         return 0;
4050
4051                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4052                 if (ntohs(udp->dest) != 67)
4053                         return 0;
4054
4055                 offset = (u8 *)udp + 8 - skb->data;
4056                 length = skb->len - offset;
4057                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4058         }
4059
4060         return 0;
4061 }
4062
4063 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4064 {
4065         struct e1000_adapter *adapter = netdev_priv(netdev);
4066
4067         netif_stop_queue(netdev);
4068         /*
4069          * Herbert's original patch had:
4070          *  smp_mb__after_netif_stop_queue();
4071          * but since that doesn't exist yet, just open code it.
4072          */
4073         smp_mb();
4074
4075         /*
4076          * We need to check again in a case another CPU has just
4077          * made room available.
4078          */
4079         if (e1000_desc_unused(adapter->tx_ring) < size)
4080                 return -EBUSY;
4081
4082         /* A reprieve! */
4083         netif_start_queue(netdev);
4084         ++adapter->restart_queue;
4085         return 0;
4086 }
4087
4088 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4089 {
4090         struct e1000_adapter *adapter = netdev_priv(netdev);
4091
4092         if (e1000_desc_unused(adapter->tx_ring) >= size)
4093                 return 0;
4094         return __e1000_maybe_stop_tx(netdev, size);
4095 }
4096
4097 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4098 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4099                                     struct net_device *netdev)
4100 {
4101         struct e1000_adapter *adapter = netdev_priv(netdev);
4102         struct e1000_ring *tx_ring = adapter->tx_ring;
4103         unsigned int first;
4104         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4105         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4106         unsigned int tx_flags = 0;
4107         unsigned int len = skb->len - skb->data_len;
4108         unsigned int nr_frags;
4109         unsigned int mss;
4110         int count = 0;
4111         int tso;
4112         unsigned int f;
4113
4114         if (test_bit(__E1000_DOWN, &adapter->state)) {
4115                 dev_kfree_skb_any(skb);
4116                 return NETDEV_TX_OK;
4117         }
4118
4119         if (skb->len <= 0) {
4120                 dev_kfree_skb_any(skb);
4121                 return NETDEV_TX_OK;
4122         }
4123
4124         mss = skb_shinfo(skb)->gso_size;
4125         /*
4126          * The controller does a simple calculation to
4127          * make sure there is enough room in the FIFO before
4128          * initiating the DMA for each buffer.  The calc is:
4129          * 4 = ceil(buffer len/mss).  To make sure we don't
4130          * overrun the FIFO, adjust the max buffer len if mss
4131          * drops.
4132          */
4133         if (mss) {
4134                 u8 hdr_len;
4135                 max_per_txd = min(mss << 2, max_per_txd);
4136                 max_txd_pwr = fls(max_per_txd) - 1;
4137
4138                 /*
4139                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4140                  * points to just header, pull a few bytes of payload from
4141                  * frags into skb->data
4142                  */
4143                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4144                 /*
4145                  * we do this workaround for ES2LAN, but it is un-necessary,
4146                  * avoiding it could save a lot of cycles
4147                  */
4148                 if (skb->data_len && (hdr_len == len)) {
4149                         unsigned int pull_size;
4150
4151                         pull_size = min((unsigned int)4, skb->data_len);
4152                         if (!__pskb_pull_tail(skb, pull_size)) {
4153                                 e_err("__pskb_pull_tail failed.\n");
4154                                 dev_kfree_skb_any(skb);
4155                                 return NETDEV_TX_OK;
4156                         }
4157                         len = skb->len - skb->data_len;
4158                 }
4159         }
4160
4161         /* reserve a descriptor for the offload context */
4162         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4163                 count++;
4164         count++;
4165
4166         count += TXD_USE_COUNT(len, max_txd_pwr);
4167
4168         nr_frags = skb_shinfo(skb)->nr_frags;
4169         for (f = 0; f < nr_frags; f++)
4170                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4171                                        max_txd_pwr);
4172
4173         if (adapter->hw.mac.tx_pkt_filtering)
4174                 e1000_transfer_dhcp_info(adapter, skb);
4175
4176         /*
4177          * need: count + 2 desc gap to keep tail from touching
4178          * head, otherwise try next time
4179          */
4180         if (e1000_maybe_stop_tx(netdev, count + 2))
4181                 return NETDEV_TX_BUSY;
4182
4183         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4184                 tx_flags |= E1000_TX_FLAGS_VLAN;
4185                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4186         }
4187
4188         first = tx_ring->next_to_use;
4189
4190         tso = e1000_tso(adapter, skb);
4191         if (tso < 0) {
4192                 dev_kfree_skb_any(skb);
4193                 return NETDEV_TX_OK;
4194         }
4195
4196         if (tso)
4197                 tx_flags |= E1000_TX_FLAGS_TSO;
4198         else if (e1000_tx_csum(adapter, skb))
4199                 tx_flags |= E1000_TX_FLAGS_CSUM;
4200
4201         /*
4202          * Old method was to assume IPv4 packet by default if TSO was enabled.
4203          * 82571 hardware supports TSO capabilities for IPv6 as well...
4204          * no longer assume, we must.
4205          */
4206         if (skb->protocol == htons(ETH_P_IP))
4207                 tx_flags |= E1000_TX_FLAGS_IPV4;
4208
4209         /* if count is 0 then mapping error has occured */
4210         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
4211         if (count) {
4212                 e1000_tx_queue(adapter, tx_flags, count);
4213                 /* Make sure there is space in the ring for the next send. */
4214                 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4215
4216         } else {
4217                 dev_kfree_skb_any(skb);
4218                 tx_ring->buffer_info[first].time_stamp = 0;
4219                 tx_ring->next_to_use = first;
4220         }
4221
4222         return NETDEV_TX_OK;
4223 }
4224
4225 /**
4226  * e1000_tx_timeout - Respond to a Tx Hang
4227  * @netdev: network interface device structure
4228  **/
4229 static void e1000_tx_timeout(struct net_device *netdev)
4230 {
4231         struct e1000_adapter *adapter = netdev_priv(netdev);
4232
4233         /* Do the reset outside of interrupt context */
4234         adapter->tx_timeout_count++;
4235         schedule_work(&adapter->reset_task);
4236 }
4237
4238 static void e1000_reset_task(struct work_struct *work)
4239 {
4240         struct e1000_adapter *adapter;
4241         adapter = container_of(work, struct e1000_adapter, reset_task);
4242
4243         e1000e_reinit_locked(adapter);
4244 }
4245
4246 /**
4247  * e1000_get_stats - Get System Network Statistics
4248  * @netdev: network interface device structure
4249  *
4250  * Returns the address of the device statistics structure.
4251  * The statistics are actually updated from the timer callback.
4252  **/
4253 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4254 {
4255         /* only return the current stats */
4256         return &netdev->stats;
4257 }
4258
4259 /**
4260  * e1000_change_mtu - Change the Maximum Transfer Unit
4261  * @netdev: network interface device structure
4262  * @new_mtu: new value for maximum frame size
4263  *
4264  * Returns 0 on success, negative on failure
4265  **/
4266 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4267 {
4268         struct e1000_adapter *adapter = netdev_priv(netdev);
4269         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4270
4271         /* Jumbo frame support */
4272         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
4273             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
4274                 e_err("Jumbo Frames not supported.\n");
4275                 return -EINVAL;
4276         }
4277
4278         /* Supported frame sizes */
4279         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
4280             (max_frame > adapter->max_hw_frame_size)) {
4281                 e_err("Unsupported MTU setting\n");
4282                 return -EINVAL;
4283         }
4284
4285         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4286                 msleep(1);
4287         /* e1000e_down has a dependency on max_frame_size */
4288         adapter->max_frame_size = max_frame;
4289         if (netif_running(netdev))
4290                 e1000e_down(adapter);
4291
4292         /*
4293          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4294          * means we reserve 2 more, this pushes us to allocate from the next
4295          * larger slab size.
4296          * i.e. RXBUFFER_2048 --> size-4096 slab
4297          * However with the new *_jumbo_rx* routines, jumbo receives will use
4298          * fragmented skbs
4299          */
4300
4301         if (max_frame <= 256)
4302                 adapter->rx_buffer_len = 256;
4303         else if (max_frame <= 512)
4304                 adapter->rx_buffer_len = 512;
4305         else if (max_frame <= 1024)
4306                 adapter->rx_buffer_len = 1024;
4307         else if (max_frame <= 2048)
4308                 adapter->rx_buffer_len = 2048;
4309         else
4310                 adapter->rx_buffer_len = 4096;
4311
4312         /* adjust allocation if LPE protects us, and we aren't using SBP */
4313         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4314              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4315                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
4316                                          + ETH_FCS_LEN;
4317
4318         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4319         netdev->mtu = new_mtu;
4320
4321         if (netif_running(netdev))
4322                 e1000e_up(adapter);
4323         else
4324                 e1000e_reset(adapter);
4325
4326         clear_bit(__E1000_RESETTING, &adapter->state);
4327
4328         return 0;
4329 }
4330
4331 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4332                            int cmd)
4333 {
4334         struct e1000_adapter *adapter = netdev_priv(netdev);
4335         struct mii_ioctl_data *data = if_mii(ifr);
4336
4337         if (adapter->hw.phy.media_type != e1000_media_type_copper)
4338                 return -EOPNOTSUPP;
4339
4340         switch (cmd) {
4341         case SIOCGMIIPHY:
4342                 data->phy_id = adapter->hw.phy.addr;
4343                 break;
4344         case SIOCGMIIREG:
4345                 e1000_phy_read_status(adapter);
4346
4347                 switch (data->reg_num & 0x1F) {
4348                 case MII_BMCR:
4349                         data->val_out = adapter->phy_regs.bmcr;
4350                         break;
4351                 case MII_BMSR:
4352                         data->val_out = adapter->phy_regs.bmsr;
4353                         break;
4354                 case MII_PHYSID1:
4355                         data->val_out = (adapter->hw.phy.id >> 16);
4356                         break;
4357                 case MII_PHYSID2:
4358                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
4359                         break;
4360                 case MII_ADVERTISE:
4361                         data->val_out = adapter->phy_regs.advertise;
4362                         break;
4363                 case MII_LPA:
4364                         data->val_out = adapter->phy_regs.lpa;
4365                         break;
4366                 case MII_EXPANSION:
4367                         data->val_out = adapter->phy_regs.expansion;
4368                         break;
4369                 case MII_CTRL1000:
4370                         data->val_out = adapter->phy_regs.ctrl1000;
4371                         break;
4372                 case MII_STAT1000:
4373                         data->val_out = adapter->phy_regs.stat1000;
4374                         break;
4375                 case MII_ESTATUS:
4376                         data->val_out = adapter->phy_regs.estatus;
4377                         break;
4378                 default:
4379                         return -EIO;
4380                 }
4381                 break;
4382         case SIOCSMIIREG:
4383         default:
4384                 return -EOPNOTSUPP;
4385         }
4386         return 0;
4387 }
4388
4389 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4390 {
4391         switch (cmd) {
4392         case SIOCGMIIPHY:
4393         case SIOCGMIIREG:
4394         case SIOCSMIIREG:
4395                 return e1000_mii_ioctl(netdev, ifr, cmd);
4396         default:
4397                 return -EOPNOTSUPP;
4398         }
4399 }
4400
4401 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
4402 {
4403         struct e1000_hw *hw = &adapter->hw;
4404         u32 i, mac_reg;
4405         u16 phy_reg;
4406         int retval = 0;
4407
4408         /* copy MAC RARs to PHY RARs */
4409         for (i = 0; i < adapter->hw.mac.rar_entry_count; i++) {
4410                 mac_reg = er32(RAL(i));
4411                 e1e_wphy(hw, BM_RAR_L(i), (u16)(mac_reg & 0xFFFF));
4412                 e1e_wphy(hw, BM_RAR_M(i), (u16)((mac_reg >> 16) & 0xFFFF));
4413                 mac_reg = er32(RAH(i));
4414                 e1e_wphy(hw, BM_RAR_H(i), (u16)(mac_reg & 0xFFFF));
4415                 e1e_wphy(hw, BM_RAR_CTRL(i), (u16)((mac_reg >> 16) & 0xFFFF));
4416         }
4417
4418         /* copy MAC MTA to PHY MTA */
4419         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
4420                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
4421                 e1e_wphy(hw, BM_MTA(i), (u16)(mac_reg & 0xFFFF));
4422                 e1e_wphy(hw, BM_MTA(i) + 1, (u16)((mac_reg >> 16) & 0xFFFF));
4423         }
4424
4425         /* configure PHY Rx Control register */
4426         e1e_rphy(&adapter->hw, BM_RCTL, &phy_reg);
4427         mac_reg = er32(RCTL);
4428         if (mac_reg & E1000_RCTL_UPE)
4429                 phy_reg |= BM_RCTL_UPE;
4430         if (mac_reg & E1000_RCTL_MPE)
4431                 phy_reg |= BM_RCTL_MPE;
4432         phy_reg &= ~(BM_RCTL_MO_MASK);
4433         if (mac_reg & E1000_RCTL_MO_3)
4434                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
4435                                 << BM_RCTL_MO_SHIFT);
4436         if (mac_reg & E1000_RCTL_BAM)
4437                 phy_reg |= BM_RCTL_BAM;
4438         if (mac_reg & E1000_RCTL_PMCF)
4439                 phy_reg |= BM_RCTL_PMCF;
4440         mac_reg = er32(CTRL);
4441         if (mac_reg & E1000_CTRL_RFCE)
4442                 phy_reg |= BM_RCTL_RFCE;
4443         e1e_wphy(&adapter->hw, BM_RCTL, phy_reg);
4444
4445         /* enable PHY wakeup in MAC register */
4446         ew32(WUFC, wufc);
4447         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
4448
4449         /* configure and enable PHY wakeup in PHY registers */
4450         e1e_wphy(&adapter->hw, BM_WUFC, wufc);
4451         e1e_wphy(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
4452
4453         /* activate PHY wakeup */
4454         retval = hw->phy.ops.acquire(hw);
4455         if (retval) {
4456                 e_err("Could not acquire PHY\n");
4457                 return retval;
4458         }
4459         e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4460                                  (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
4461         retval = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
4462         if (retval) {
4463                 e_err("Could not read PHY page 769\n");
4464                 goto out;
4465         }
4466         phy_reg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
4467         retval = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
4468         if (retval)
4469                 e_err("Could not set PHY Host Wakeup bit\n");
4470 out:
4471         hw->phy.ops.release(hw);
4472
4473         return retval;
4474 }
4475
4476 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake)
4477 {
4478         struct net_device *netdev = pci_get_drvdata(pdev);
4479         struct e1000_adapter *adapter = netdev_priv(netdev);
4480         struct e1000_hw *hw = &adapter->hw;
4481         u32 ctrl, ctrl_ext, rctl, status;
4482         u32 wufc = adapter->wol;
4483         int retval = 0;
4484
4485         netif_device_detach(netdev);
4486
4487         if (netif_running(netdev)) {
4488                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4489                 e1000e_down(adapter);
4490                 e1000_free_irq(adapter);
4491         }
4492         e1000e_reset_interrupt_capability(adapter);
4493
4494         retval = pci_save_state(pdev);
4495         if (retval)
4496                 return retval;
4497
4498         status = er32(STATUS);
4499         if (status & E1000_STATUS_LU)
4500                 wufc &= ~E1000_WUFC_LNKC;
4501
4502         if (wufc) {
4503                 e1000_setup_rctl(adapter);
4504                 e1000_set_multi(netdev);
4505
4506                 /* turn on all-multi mode if wake on multicast is enabled */
4507                 if (wufc & E1000_WUFC_MC) {
4508                         rctl = er32(RCTL);
4509                         rctl |= E1000_RCTL_MPE;
4510                         ew32(RCTL, rctl);
4511                 }
4512
4513                 ctrl = er32(CTRL);
4514                 /* advertise wake from D3Cold */
4515                 #define E1000_CTRL_ADVD3WUC 0x00100000
4516                 /* phy power management enable */
4517                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4518                 ctrl |= E1000_CTRL_ADVD3WUC;
4519                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
4520                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
4521                 ew32(CTRL, ctrl);
4522
4523                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4524                     adapter->hw.phy.media_type ==
4525                     e1000_media_type_internal_serdes) {
4526                         /* keep the laser running in D3 */
4527                         ctrl_ext = er32(CTRL_EXT);
4528                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4529                         ew32(CTRL_EXT, ctrl_ext);
4530                 }
4531
4532                 if (adapter->flags & FLAG_IS_ICH)
4533                         e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4534
4535                 /* Allow time for pending master requests to run */
4536                 e1000e_disable_pcie_master(&adapter->hw);
4537
4538                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4539                         /* enable wakeup by the PHY */
4540                         retval = e1000_init_phy_wakeup(adapter, wufc);
4541                         if (retval)
4542                                 return retval;
4543                 } else {
4544                         /* enable wakeup by the MAC */
4545                         ew32(WUFC, wufc);
4546                         ew32(WUC, E1000_WUC_PME_EN);
4547                 }
4548         } else {
4549                 ew32(WUC, 0);
4550                 ew32(WUFC, 0);
4551         }
4552
4553         *enable_wake = !!wufc;
4554
4555         /* make sure adapter isn't asleep if manageability is enabled */
4556         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
4557             (hw->mac.ops.check_mng_mode(hw)))
4558                 *enable_wake = true;
4559
4560         if (adapter->hw.phy.type == e1000_phy_igp_3)
4561                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4562
4563         /*
4564          * Release control of h/w to f/w.  If f/w is AMT enabled, this
4565          * would have already happened in close and is redundant.
4566          */
4567         e1000_release_hw_control(adapter);
4568
4569         pci_disable_device(pdev);
4570
4571         return 0;
4572 }
4573
4574 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
4575 {
4576         if (sleep && wake) {
4577                 pci_prepare_to_sleep(pdev);
4578                 return;
4579         }
4580
4581         pci_wake_from_d3(pdev, wake);
4582         pci_set_power_state(pdev, PCI_D3hot);
4583 }
4584
4585 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
4586                                     bool wake)
4587 {
4588         struct net_device *netdev = pci_get_drvdata(pdev);
4589         struct e1000_adapter *adapter = netdev_priv(netdev);
4590
4591         /*
4592          * The pci-e switch on some quad port adapters will report a
4593          * correctable error when the MAC transitions from D0 to D3.  To
4594          * prevent this we need to mask off the correctable errors on the
4595          * downstream port of the pci-e switch.
4596          */
4597         if (adapter->flags & FLAG_IS_QUAD_PORT) {
4598                 struct pci_dev *us_dev = pdev->bus->self;
4599                 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
4600                 u16 devctl;
4601
4602                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
4603                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
4604                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
4605
4606                 e1000_power_off(pdev, sleep, wake);
4607
4608                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
4609         } else {
4610                 e1000_power_off(pdev, sleep, wake);
4611         }
4612 }
4613
4614 static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4615 {
4616         int pos;
4617         u16 val;
4618
4619         /*
4620          * 82573 workaround - disable L1 ASPM on mobile chipsets
4621          *
4622          * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4623          * resulting in lost data or garbage information on the pci-e link
4624          * level. This could result in (false) bad EEPROM checksum errors,
4625          * long ping times (up to 2s) or even a system freeze/hang.
4626          *
4627          * Unfortunately this feature saves about 1W power consumption when
4628          * active.
4629          */
4630         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
4631         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4632         if (val & 0x2) {
4633                 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4634                 val &= ~0x2;
4635                 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4636         }
4637 }
4638
4639 #ifdef CONFIG_PM
4640 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4641 {
4642         int retval;
4643         bool wake;
4644
4645         retval = __e1000_shutdown(pdev, &wake);
4646         if (!retval)
4647                 e1000_complete_shutdown(pdev, true, wake);
4648
4649         return retval;
4650 }
4651
4652 static int e1000_resume(struct pci_dev *pdev)
4653 {
4654         struct net_device *netdev = pci_get_drvdata(pdev);
4655         struct e1000_adapter *adapter = netdev_priv(netdev);
4656         struct e1000_hw *hw = &adapter->hw;
4657         u32 err;
4658
4659         pci_set_power_state(pdev, PCI_D0);
4660         pci_restore_state(pdev);
4661         e1000e_disable_l1aspm(pdev);
4662
4663         err = pci_enable_device_mem(pdev);
4664         if (err) {
4665                 dev_err(&pdev->dev,
4666                         "Cannot enable PCI device from suspend\n");
4667                 return err;
4668         }
4669
4670         pci_set_master(pdev);
4671
4672         pci_enable_wake(pdev, PCI_D3hot, 0);
4673         pci_enable_wake(pdev, PCI_D3cold, 0);
4674
4675         e1000e_set_interrupt_capability(adapter);
4676         if (netif_running(netdev)) {
4677                 err = e1000_request_irq(adapter);
4678                 if (err)
4679                         return err;
4680         }
4681
4682         e1000e_power_up_phy(adapter);
4683
4684         /* report the system wakeup cause from S3/S4 */
4685         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4686                 u16 phy_data;
4687
4688                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
4689                 if (phy_data) {
4690                         e_info("PHY Wakeup cause - %s\n",
4691                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
4692                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
4693                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
4694                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
4695                                 phy_data & E1000_WUS_LNKC ? "Link Status "
4696                                 " Change" : "other");
4697                 }
4698                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
4699         } else {
4700                 u32 wus = er32(WUS);
4701                 if (wus) {
4702                         e_info("MAC Wakeup cause - %s\n",
4703                                 wus & E1000_WUS_EX ? "Unicast Packet" :
4704                                 wus & E1000_WUS_MC ? "Multicast Packet" :
4705                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
4706                                 wus & E1000_WUS_MAG ? "Magic Packet" :
4707                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
4708                                 "other");
4709                 }
4710                 ew32(WUS, ~0);
4711         }
4712
4713         e1000e_reset(adapter);
4714
4715         e1000_init_manageability(adapter);
4716
4717         if (netif_running(netdev))
4718                 e1000e_up(adapter);
4719
4720         netif_device_attach(netdev);
4721
4722         /*
4723          * If the controller has AMT, do not set DRV_LOAD until the interface
4724          * is up.  For all other cases, let the f/w know that the h/w is now
4725          * under the control of the driver.
4726          */
4727         if (!(adapter->flags & FLAG_HAS_AMT))
4728                 e1000_get_hw_control(adapter);
4729
4730         return 0;
4731 }
4732 #endif
4733
4734 static void e1000_shutdown(struct pci_dev *pdev)
4735 {
4736         bool wake = false;
4737
4738         __e1000_shutdown(pdev, &wake);
4739
4740         if (system_state == SYSTEM_POWER_OFF)
4741                 e1000_complete_shutdown(pdev, false, wake);
4742 }
4743
4744 #ifdef CONFIG_NET_POLL_CONTROLLER
4745 /*
4746  * Polling 'interrupt' - used by things like netconsole to send skbs
4747  * without having to re-enable interrupts. It's not called while
4748  * the interrupt routine is executing.
4749  */
4750 static void e1000_netpoll(struct net_device *netdev)
4751 {
4752         struct e1000_adapter *adapter = netdev_priv(netdev);
4753
4754         disable_irq(adapter->pdev->irq);
4755         e1000_intr(adapter->pdev->irq, netdev);
4756
4757         enable_irq(adapter->pdev->irq);
4758 }
4759 #endif
4760
4761 /**
4762  * e1000_io_error_detected - called when PCI error is detected
4763  * @pdev: Pointer to PCI device
4764  * @state: The current pci connection state
4765  *
4766  * This function is called after a PCI bus error affecting
4767  * this device has been detected.
4768  */
4769 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4770                                                 pci_channel_state_t state)
4771 {
4772         struct net_device *netdev = pci_get_drvdata(pdev);
4773         struct e1000_adapter *adapter = netdev_priv(netdev);
4774
4775         netif_device_detach(netdev);
4776
4777         if (state == pci_channel_io_perm_failure)
4778                 return PCI_ERS_RESULT_DISCONNECT;
4779
4780         if (netif_running(netdev))
4781                 e1000e_down(adapter);
4782         pci_disable_device(pdev);
4783
4784         /* Request a slot slot reset. */
4785         return PCI_ERS_RESULT_NEED_RESET;
4786 }
4787
4788 /**
4789  * e1000_io_slot_reset - called after the pci bus has been reset.
4790  * @pdev: Pointer to PCI device
4791  *
4792  * Restart the card from scratch, as if from a cold-boot. Implementation
4793  * resembles the first-half of the e1000_resume routine.
4794  */
4795 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4796 {
4797         struct net_device *netdev = pci_get_drvdata(pdev);
4798         struct e1000_adapter *adapter = netdev_priv(netdev);
4799         struct e1000_hw *hw = &adapter->hw;
4800         int err;
4801         pci_ers_result_t result;
4802
4803         e1000e_disable_l1aspm(pdev);
4804         err = pci_enable_device_mem(pdev);
4805         if (err) {
4806                 dev_err(&pdev->dev,
4807                         "Cannot re-enable PCI device after reset.\n");
4808                 result = PCI_ERS_RESULT_DISCONNECT;
4809         } else {
4810                 pci_set_master(pdev);
4811                 pci_restore_state(pdev);
4812
4813                 pci_enable_wake(pdev, PCI_D3hot, 0);
4814                 pci_enable_wake(pdev, PCI_D3cold, 0);
4815
4816                 e1000e_reset(adapter);
4817                 ew32(WUS, ~0);
4818                 result = PCI_ERS_RESULT_RECOVERED;
4819         }
4820
4821         pci_cleanup_aer_uncorrect_error_status(pdev);
4822
4823         return result;
4824 }
4825
4826 /**
4827  * e1000_io_resume - called when traffic can start flowing again.
4828  * @pdev: Pointer to PCI device
4829  *
4830  * This callback is called when the error recovery driver tells us that
4831  * its OK to resume normal operation. Implementation resembles the
4832  * second-half of the e1000_resume routine.
4833  */
4834 static void e1000_io_resume(struct pci_dev *pdev)
4835 {
4836         struct net_device *netdev = pci_get_drvdata(pdev);
4837         struct e1000_adapter *adapter = netdev_priv(netdev);
4838
4839         e1000_init_manageability(adapter);
4840
4841         if (netif_running(netdev)) {
4842                 if (e1000e_up(adapter)) {
4843                         dev_err(&pdev->dev,
4844                                 "can't bring device back up after reset\n");
4845                         return;
4846                 }
4847         }
4848
4849         netif_device_attach(netdev);
4850
4851         /*
4852          * If the controller has AMT, do not set DRV_LOAD until the interface
4853          * is up.  For all other cases, let the f/w know that the h/w is now
4854          * under the control of the driver.
4855          */
4856         if (!(adapter->flags & FLAG_HAS_AMT))
4857                 e1000_get_hw_control(adapter);
4858
4859 }
4860
4861 static void e1000_print_device_info(struct e1000_adapter *adapter)
4862 {
4863         struct e1000_hw *hw = &adapter->hw;
4864         struct net_device *netdev = adapter->netdev;
4865         u32 pba_num;
4866
4867         /* print bus type/speed/width info */
4868         e_info("(PCI Express:2.5GB/s:%s) %pM\n",
4869                /* bus width */
4870                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4871                 "Width x1"),
4872                /* MAC address */
4873                netdev->dev_addr);
4874         e_info("Intel(R) PRO/%s Network Connection\n",
4875                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
4876         e1000e_read_pba_num(hw, &pba_num);
4877         e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4878                hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
4879 }
4880
4881 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4882 {
4883         struct e1000_hw *hw = &adapter->hw;
4884         int ret_val;
4885         u16 buf = 0;
4886
4887         if (hw->mac.type != e1000_82573)
4888                 return;
4889
4890         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
4891         if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
4892                 /* Deep Smart Power Down (DSPD) */
4893                 dev_warn(&adapter->pdev->dev,
4894                          "Warning: detected DSPD enabled in EEPROM\n");
4895         }
4896
4897         ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
4898         if (!ret_val && (le16_to_cpu(buf) & (3 << 2))) {
4899                 /* ASPM enable */
4900                 dev_warn(&adapter->pdev->dev,
4901                          "Warning: detected ASPM enabled in EEPROM\n");
4902         }
4903 }
4904
4905 static const struct net_device_ops e1000e_netdev_ops = {
4906         .ndo_open               = e1000_open,
4907         .ndo_stop               = e1000_close,
4908         .ndo_start_xmit         = e1000_xmit_frame,
4909         .ndo_get_stats          = e1000_get_stats,
4910         .ndo_set_multicast_list = e1000_set_multi,
4911         .ndo_set_mac_address    = e1000_set_mac,
4912         .ndo_change_mtu         = e1000_change_mtu,
4913         .ndo_do_ioctl           = e1000_ioctl,
4914         .ndo_tx_timeout         = e1000_tx_timeout,
4915         .ndo_validate_addr      = eth_validate_addr,
4916
4917         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
4918         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
4919         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
4920 #ifdef CONFIG_NET_POLL_CONTROLLER
4921         .ndo_poll_controller    = e1000_netpoll,
4922 #endif
4923 };
4924
4925 /**
4926  * e1000_probe - Device Initialization Routine
4927  * @pdev: PCI device information struct
4928  * @ent: entry in e1000_pci_tbl
4929  *
4930  * Returns 0 on success, negative on failure
4931  *
4932  * e1000_probe initializes an adapter identified by a pci_dev structure.
4933  * The OS initialization, configuring of the adapter private structure,
4934  * and a hardware reset occur.
4935  **/
4936 static int __devinit e1000_probe(struct pci_dev *pdev,
4937                                  const struct pci_device_id *ent)
4938 {
4939         struct net_device *netdev;
4940         struct e1000_adapter *adapter;
4941         struct e1000_hw *hw;
4942         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
4943         resource_size_t mmio_start, mmio_len;
4944         resource_size_t flash_start, flash_len;
4945
4946         static int cards_found;
4947         int i, err, pci_using_dac;
4948         u16 eeprom_data = 0;
4949         u16 eeprom_apme_mask = E1000_EEPROM_APME;
4950
4951         e1000e_disable_l1aspm(pdev);
4952
4953         err = pci_enable_device_mem(pdev);
4954         if (err)
4955                 return err;
4956
4957         pci_using_dac = 0;
4958         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
4959         if (!err) {
4960                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
4961                 if (!err)
4962                         pci_using_dac = 1;
4963         } else {
4964                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
4965                 if (err) {
4966                         err = pci_set_consistent_dma_mask(pdev,
4967                                                           DMA_BIT_MASK(32));
4968                         if (err) {
4969                                 dev_err(&pdev->dev, "No usable DMA "
4970                                         "configuration, aborting\n");
4971                                 goto err_dma;
4972                         }
4973                 }
4974         }
4975
4976         err = pci_request_selected_regions_exclusive(pdev,
4977                                           pci_select_bars(pdev, IORESOURCE_MEM),
4978                                           e1000e_driver_name);
4979         if (err)
4980                 goto err_pci_reg;
4981
4982         /* AER (Advanced Error Reporting) hooks */
4983         pci_enable_pcie_error_reporting(pdev);
4984
4985         pci_set_master(pdev);
4986         /* PCI config space info */
4987         err = pci_save_state(pdev);
4988         if (err)
4989                 goto err_alloc_etherdev;
4990
4991         err = -ENOMEM;
4992         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
4993         if (!netdev)
4994                 goto err_alloc_etherdev;
4995
4996         SET_NETDEV_DEV(netdev, &pdev->dev);
4997
4998         pci_set_drvdata(pdev, netdev);
4999         adapter = netdev_priv(netdev);
5000         hw = &adapter->hw;
5001         adapter->netdev = netdev;
5002         adapter->pdev = pdev;
5003         adapter->ei = ei;
5004         adapter->pba = ei->pba;
5005         adapter->flags = ei->flags;
5006         adapter->flags2 = ei->flags2;
5007         adapter->hw.adapter = adapter;
5008         adapter->hw.mac.type = ei->mac;
5009         adapter->max_hw_frame_size = ei->max_hw_frame_size;
5010         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
5011
5012         mmio_start = pci_resource_start(pdev, 0);
5013         mmio_len = pci_resource_len(pdev, 0);
5014
5015         err = -EIO;
5016         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
5017         if (!adapter->hw.hw_addr)
5018                 goto err_ioremap;
5019
5020         if ((adapter->flags & FLAG_HAS_FLASH) &&
5021             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
5022                 flash_start = pci_resource_start(pdev, 1);
5023                 flash_len = pci_resource_len(pdev, 1);
5024                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
5025                 if (!adapter->hw.flash_address)
5026                         goto err_flashmap;
5027         }
5028
5029         /* construct the net_device struct */
5030         netdev->netdev_ops              = &e1000e_netdev_ops;
5031         e1000e_set_ethtool_ops(netdev);
5032         netdev->watchdog_timeo          = 5 * HZ;
5033         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
5034         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
5035
5036         netdev->mem_start = mmio_start;
5037         netdev->mem_end = mmio_start + mmio_len;
5038
5039         adapter->bd_number = cards_found++;
5040
5041         e1000e_check_options(adapter);
5042
5043         /* setup adapter struct */
5044         err = e1000_sw_init(adapter);
5045         if (err)
5046                 goto err_sw_init;
5047
5048         err = -EIO;
5049
5050         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
5051         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
5052         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
5053
5054         err = ei->get_variants(adapter);
5055         if (err)
5056                 goto err_hw_init;
5057
5058         if ((adapter->flags & FLAG_IS_ICH) &&
5059             (adapter->flags & FLAG_READ_ONLY_NVM))
5060                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
5061
5062         hw->mac.ops.get_bus_info(&adapter->hw);
5063
5064         adapter->hw.phy.autoneg_wait_to_complete = 0;
5065
5066         /* Copper options */
5067         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
5068                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
5069                 adapter->hw.phy.disable_polarity_correction = 0;
5070                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
5071         }
5072
5073         if (e1000_check_reset_block(&adapter->hw))
5074                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5075
5076         netdev->features = NETIF_F_SG |
5077                            NETIF_F_HW_CSUM |
5078                            NETIF_F_HW_VLAN_TX |
5079                            NETIF_F_HW_VLAN_RX;
5080
5081         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
5082                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
5083
5084         netdev->features |= NETIF_F_TSO;
5085         netdev->features |= NETIF_F_TSO6;
5086
5087         netdev->vlan_features |= NETIF_F_TSO;
5088         netdev->vlan_features |= NETIF_F_TSO6;
5089         netdev->vlan_features |= NETIF_F_HW_CSUM;
5090         netdev->vlan_features |= NETIF_F_SG;
5091
5092         if (pci_using_dac)
5093                 netdev->features |= NETIF_F_HIGHDMA;
5094
5095         if (e1000e_enable_mng_pass_thru(&adapter->hw))
5096                 adapter->flags |= FLAG_MNG_PT_ENABLED;
5097
5098         /*
5099          * before reading the NVM, reset the controller to
5100          * put the device in a known good starting state
5101          */
5102         adapter->hw.mac.ops.reset_hw(&adapter->hw);
5103
5104         /*
5105          * systems with ASPM and others may see the checksum fail on the first
5106          * attempt. Let's give it a few tries
5107          */
5108         for (i = 0;; i++) {
5109                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
5110                         break;
5111                 if (i == 2) {
5112                         e_err("The NVM Checksum Is Not Valid\n");
5113                         err = -EIO;
5114                         goto err_eeprom;
5115                 }
5116         }
5117
5118         e1000_eeprom_checks(adapter);
5119
5120         /* copy the MAC address out of the NVM */
5121         if (e1000e_read_mac_addr(&adapter->hw))
5122                 e_err("NVM Read Error while reading MAC address\n");
5123
5124         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
5125         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
5126
5127         if (!is_valid_ether_addr(netdev->perm_addr)) {
5128                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
5129                 err = -EIO;
5130                 goto err_eeprom;
5131         }
5132
5133         init_timer(&adapter->watchdog_timer);
5134         adapter->watchdog_timer.function = &e1000_watchdog;
5135         adapter->watchdog_timer.data = (unsigned long) adapter;
5136
5137         init_timer(&adapter->phy_info_timer);
5138         adapter->phy_info_timer.function = &e1000_update_phy_info;
5139         adapter->phy_info_timer.data = (unsigned long) adapter;
5140
5141         INIT_WORK(&adapter->reset_task, e1000_reset_task);
5142         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
5143         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
5144         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
5145         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
5146
5147         /* Initialize link parameters. User can change them with ethtool */
5148         adapter->hw.mac.autoneg = 1;
5149         adapter->fc_autoneg = 1;
5150         adapter->hw.fc.requested_mode = e1000_fc_default;
5151         adapter->hw.fc.current_mode = e1000_fc_default;
5152         adapter->hw.phy.autoneg_advertised = 0x2f;
5153
5154         /* ring size defaults */
5155         adapter->rx_ring->count = 256;
5156         adapter->tx_ring->count = 256;
5157
5158         /*
5159          * Initial Wake on LAN setting - If APM wake is enabled in
5160          * the EEPROM, enable the ACPI Magic Packet filter
5161          */
5162         if (adapter->flags & FLAG_APME_IN_WUC) {
5163                 /* APME bit in EEPROM is mapped to WUC.APME */
5164                 eeprom_data = er32(WUC);
5165                 eeprom_apme_mask = E1000_WUC_APME;
5166                 if (eeprom_data & E1000_WUC_PHY_WAKE)
5167                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
5168         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
5169                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
5170                     (adapter->hw.bus.func == 1))
5171                         e1000_read_nvm(&adapter->hw,
5172                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
5173                 else
5174                         e1000_read_nvm(&adapter->hw,
5175                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
5176         }
5177
5178         /* fetch WoL from EEPROM */
5179         if (eeprom_data & eeprom_apme_mask)
5180                 adapter->eeprom_wol |= E1000_WUFC_MAG;
5181
5182         /*
5183          * now that we have the eeprom settings, apply the special cases
5184          * where the eeprom may be wrong or the board simply won't support
5185          * wake on lan on a particular port
5186          */
5187         if (!(adapter->flags & FLAG_HAS_WOL))
5188                 adapter->eeprom_wol = 0;
5189
5190         /* initialize the wol settings based on the eeprom settings */
5191         adapter->wol = adapter->eeprom_wol;
5192         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5193
5194         /* save off EEPROM version number */
5195         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
5196
5197         /* reset the hardware with the new settings */
5198         e1000e_reset(adapter);
5199
5200         /*
5201          * If the controller has AMT, do not set DRV_LOAD until the interface
5202          * is up.  For all other cases, let the f/w know that the h/w is now
5203          * under the control of the driver.
5204          */
5205         if (!(adapter->flags & FLAG_HAS_AMT))
5206                 e1000_get_hw_control(adapter);
5207
5208         strcpy(netdev->name, "eth%d");
5209         err = register_netdev(netdev);
5210         if (err)
5211                 goto err_register;
5212
5213         /* carrier off reporting is important to ethtool even BEFORE open */
5214         netif_carrier_off(netdev);
5215
5216         e1000_print_device_info(adapter);
5217
5218         return 0;
5219
5220 err_register:
5221         if (!(adapter->flags & FLAG_HAS_AMT))
5222                 e1000_release_hw_control(adapter);
5223 err_eeprom:
5224         if (!e1000_check_reset_block(&adapter->hw))
5225                 e1000_phy_hw_reset(&adapter->hw);
5226 err_hw_init:
5227
5228         kfree(adapter->tx_ring);
5229         kfree(adapter->rx_ring);
5230 err_sw_init:
5231         if (adapter->hw.flash_address)
5232                 iounmap(adapter->hw.flash_address);
5233         e1000e_reset_interrupt_capability(adapter);
5234 err_flashmap:
5235         iounmap(adapter->hw.hw_addr);
5236 err_ioremap:
5237         free_netdev(netdev);
5238 err_alloc_etherdev:
5239         pci_release_selected_regions(pdev,
5240                                      pci_select_bars(pdev, IORESOURCE_MEM));
5241 err_pci_reg:
5242 err_dma:
5243         pci_disable_device(pdev);
5244         return err;
5245 }
5246
5247 /**
5248  * e1000_remove - Device Removal Routine
5249  * @pdev: PCI device information struct
5250  *
5251  * e1000_remove is called by the PCI subsystem to alert the driver
5252  * that it should release a PCI device.  The could be caused by a
5253  * Hot-Plug event, or because the driver is going to be removed from
5254  * memory.
5255  **/
5256 static void __devexit e1000_remove(struct pci_dev *pdev)
5257 {
5258         struct net_device *netdev = pci_get_drvdata(pdev);
5259         struct e1000_adapter *adapter = netdev_priv(netdev);
5260
5261         /*
5262          * flush_scheduled work may reschedule our watchdog task, so
5263          * explicitly disable watchdog tasks from being rescheduled
5264          */
5265         set_bit(__E1000_DOWN, &adapter->state);
5266         del_timer_sync(&adapter->watchdog_timer);
5267         del_timer_sync(&adapter->phy_info_timer);
5268
5269         cancel_work_sync(&adapter->reset_task);
5270         cancel_work_sync(&adapter->watchdog_task);
5271         cancel_work_sync(&adapter->downshift_task);
5272         cancel_work_sync(&adapter->update_phy_task);
5273         cancel_work_sync(&adapter->print_hang_task);
5274         flush_scheduled_work();
5275
5276         /*
5277          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5278          * would have already happened in close and is redundant.
5279          */
5280         e1000_release_hw_control(adapter);
5281
5282         unregister_netdev(netdev);
5283
5284         if (!e1000_check_reset_block(&adapter->hw))
5285                 e1000_phy_hw_reset(&adapter->hw);
5286
5287         e1000e_reset_interrupt_capability(adapter);
5288         kfree(adapter->tx_ring);
5289         kfree(adapter->rx_ring);
5290
5291         iounmap(adapter->hw.hw_addr);
5292         if (adapter->hw.flash_address)
5293                 iounmap(adapter->hw.flash_address);
5294         pci_release_selected_regions(pdev,
5295                                      pci_select_bars(pdev, IORESOURCE_MEM));
5296
5297         free_netdev(netdev);
5298
5299         /* AER disable */
5300         pci_disable_pcie_error_reporting(pdev);
5301
5302         pci_disable_device(pdev);
5303 }
5304
5305 /* PCI Error Recovery (ERS) */
5306 static struct pci_error_handlers e1000_err_handler = {
5307         .error_detected = e1000_io_error_detected,
5308         .slot_reset = e1000_io_slot_reset,
5309         .resume = e1000_io_resume,
5310 };
5311
5312 static struct pci_device_id e1000_pci_tbl[] = {
5313         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5314         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5315         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5316         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5317         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5318         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
5319         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5320         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5321         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
5322
5323         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5324         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5325         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5326         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
5327
5328         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5329         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5330         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
5331
5332         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
5333         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
5334         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
5335
5336         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5337           board_80003es2lan },
5338         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5339           board_80003es2lan },
5340         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5341           board_80003es2lan },
5342         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5343           board_80003es2lan },
5344
5345         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5346         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5347         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5348         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5349         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5350         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5351         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
5352
5353         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5354         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5355         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5356         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5357         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
5358         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
5359         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5360         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5361         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5362
5363         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5364         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5365         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
5366
5367         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5368         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5369
5370         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
5371         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
5372         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
5373         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
5374
5375         { }     /* terminate list */
5376 };
5377 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5378
5379 /* PCI Device API Driver */
5380 static struct pci_driver e1000_driver = {
5381         .name     = e1000e_driver_name,
5382         .id_table = e1000_pci_tbl,
5383         .probe    = e1000_probe,
5384         .remove   = __devexit_p(e1000_remove),
5385 #ifdef CONFIG_PM
5386         /* Power Management Hooks */
5387         .suspend  = e1000_suspend,
5388         .resume   = e1000_resume,
5389 #endif
5390         .shutdown = e1000_shutdown,
5391         .err_handler = &e1000_err_handler
5392 };
5393
5394 /**
5395  * e1000_init_module - Driver Registration Routine
5396  *
5397  * e1000_init_module is the first routine called when the driver is
5398  * loaded. All it does is register with the PCI subsystem.
5399  **/
5400 static int __init e1000_init_module(void)
5401 {
5402         int ret;
5403         printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
5404                e1000e_driver_name, e1000e_driver_version);
5405         printk(KERN_INFO "%s: Copyright (c) 1999 - 2009 Intel Corporation.\n",
5406                e1000e_driver_name);
5407         ret = pci_register_driver(&e1000_driver);
5408
5409         return ret;
5410 }
5411 module_init(e1000_init_module);
5412
5413 /**
5414  * e1000_exit_module - Driver Exit Cleanup Routine
5415  *
5416  * e1000_exit_module is called just before the driver is removed
5417  * from memory.
5418  **/
5419 static void __exit e1000_exit_module(void)
5420 {
5421         pci_unregister_driver(&e1000_driver);
5422 }
5423 module_exit(e1000_exit_module);
5424
5425
5426 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5427 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5428 MODULE_LICENSE("GPL");
5429 MODULE_VERSION(DRV_VERSION);
5430
5431 /* e1000_main.c */