drivers/net/e1000e/netdev.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2008 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
  48 #include "e1000.h"
  49
  50 #define DRV_VERSION "0.3.3.3-k4"
  51 char e1000e_driver_name[] = "e1000e";
  52 const char e1000e_driver_version[] = DRV_VERSION;
  53
  54 static const struct e1000_info *e1000_info_tbl[] = {
  55         [board_82571]           = &e1000_82571_info,
  56         [board_82572]           = &e1000_82572_info,
  57         [board_82573]           = &e1000_82573_info,
  58         [board_80003es2lan]     = &e1000_es2_info,
  59         [board_ich8lan]         = &e1000_ich8_info,
  60         [board_ich9lan]         = &e1000_ich9_info,
  61 };
  62
  63 #ifdef DEBUG
  64 /**
  65  * e1000_get_hw_dev_name - return device name string
  66  * used by hardware layer to print debugging information
  67  **/
  68 char *e1000e_get_hw_dev_name(struct e1000_hw *hw)
  69 {
  70         return hw->adapter->netdev->name;
  71 }
  72 #endif
  73
  74 /**
  75  * e1000_desc_unused - calculate if we have unused descriptors
  76  **/
  77 static int e1000_desc_unused(struct e1000_ring *ring)
  78 {
  79         if (ring->next_to_clean > ring->next_to_use)
  80                 return ring->next_to_clean - ring->next_to_use - 1;
  81
  82         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  83 }
  84
  85 /**
  86  * e1000_receive_skb - helper function to handle Rx indications
  87  * @adapter: board private structure
  88  * @status: descriptor status field as written by hardware
  89  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  90  * @skb: pointer to sk_buff to be indicated to stack
  91  **/
  92 static void e1000_receive_skb(struct e1000_adapter *adapter,
  93                               struct net_device *netdev,
  94                               struct sk_buff *skb,
  95                               u8 status, __le16 vlan)
  96 {
  97         skb->protocol = eth_type_trans(skb, netdev);
  98
  99         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
 100                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
 101                                          le16_to_cpu(vlan));
 102         else
 103                 netif_receive_skb(skb);
 104
 105         netdev->last_rx = jiffies;
 106 }
 107
 108 /**
 109  * e1000_rx_checksum - Receive Checksum Offload for 82543
 110  * @adapter:     board private structure
 111  * @status_err:  receive descriptor status and error fields
 112  * @csum:       receive descriptor csum field
 113  * @sk_buff:     socket buffer with received data
 114  **/
 115 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 116                               u32 csum, struct sk_buff *skb)
 117 {
 118         u16 status = (u16)status_err;
 119         u8 errors = (u8)(status_err >> 24);
 120         skb->ip_summed = CHECKSUM_NONE;
 121
 122         /* Ignore Checksum bit is set */
 123         if (status & E1000_RXD_STAT_IXSM)
 124                 return;
 125         /* TCP/UDP checksum error bit is set */
 126         if (errors & E1000_RXD_ERR_TCPE) {
 127                 /* let the stack verify checksum errors */
 128                 adapter->hw_csum_err++;
 129                 return;
 130         }
 131
 132         /* TCP/UDP Checksum has not been calculated */
 133         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 134                 return;
 135
 136         /* It must be a TCP or UDP packet with a valid checksum */
 137         if (status & E1000_RXD_STAT_TCPCS) {
 138                 /* TCP checksum is good */
 139                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 140         } else {
 141                 /*
 142                  * IP fragment with UDP payload
 143                  * Hardware complements the payload checksum, so we undo it
 144                  * and then put the value in host order for further stack use.
 145                  */
 146                 __sum16 sum = (__force __sum16)htons(csum);
 147                 skb->csum = csum_unfold(~sum);
 148                 skb->ip_summed = CHECKSUM_COMPLETE;
 149         }
 150         adapter->hw_csum_good++;
 151 }
 152
 153 /**
 154  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 155  * @adapter: address of board private structure
 156  **/
 157 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 158                                    int cleaned_count)
 159 {
 160         struct net_device *netdev = adapter->netdev;
 161         struct pci_dev *pdev = adapter->pdev;
 162         struct e1000_ring *rx_ring = adapter->rx_ring;
 163         struct e1000_rx_desc *rx_desc;
 164         struct e1000_buffer *buffer_info;
 165         struct sk_buff *skb;
 166         unsigned int i;
 167         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
 168
 169         i = rx_ring->next_to_use;
 170         buffer_info = &rx_ring->buffer_info[i];
 171
 172         while (cleaned_count--) {
 173                 skb = buffer_info->skb;
 174                 if (skb) {
 175                         skb_trim(skb, 0);
 176                         goto map_skb;
 177                 }
 178
 179                 skb = netdev_alloc_skb(netdev, bufsz);
 180                 if (!skb) {
 181                         /* Better luck next round */
 182                         adapter->alloc_rx_buff_failed++;
 183                         break;
 184                 }
 185
 186                 /*
 187                  * Make buffer alignment 2 beyond a 16 byte boundary
 188                  * this will result in a 16 byte aligned IP header after
 189                  * the 14 byte MAC header is removed
 190                  */
 191                 skb_reserve(skb, NET_IP_ALIGN);
 192
 193                 buffer_info->skb = skb;
 194 map_skb:
 195                 buffer_info->dma = pci_map_single(pdev, skb->data,
 196                                                   adapter->rx_buffer_len,
 197                                                   PCI_DMA_FROMDEVICE);
 198                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 199                         dev_err(&pdev->dev, "RX DMA map failed\n");
 200                         adapter->rx_dma_failed++;
 201                         break;
 202                 }
 203
 204                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 205                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 206
 207                 i++;
 208                 if (i == rx_ring->count)
 209                         i = 0;
 210                 buffer_info = &rx_ring->buffer_info[i];
 211         }
 212
 213         if (rx_ring->next_to_use != i) {
 214                 rx_ring->next_to_use = i;
 215                 if (i-- == 0)
 216                         i = (rx_ring->count - 1);
 217
 218                 /*
 219                  * Force memory writes to complete before letting h/w
 220                  * know there are new descriptors to fetch.  (Only
 221                  * applicable for weak-ordered memory model archs,
 222                  * such as IA-64).
 223                  */
 224                 wmb();
 225                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 226         }
 227 }
 228
 229 /**
 230  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 231  * @adapter: address of board private structure
 232  **/
 233 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 234                                       int cleaned_count)
 235 {
 236         struct net_device *netdev = adapter->netdev;
 237         struct pci_dev *pdev = adapter->pdev;
 238         union e1000_rx_desc_packet_split *rx_desc;
 239         struct e1000_ring *rx_ring = adapter->rx_ring;
 240         struct e1000_buffer *buffer_info;
 241         struct e1000_ps_page *ps_page;
 242         struct sk_buff *skb;
 243         unsigned int i, j;
 244
 245         i = rx_ring->next_to_use;
 246         buffer_info = &rx_ring->buffer_info[i];
 247
 248         while (cleaned_count--) {
 249                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 250
 251                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 252                         ps_page = &buffer_info->ps_pages[j];
 253                         if (j >= adapter->rx_ps_pages) {
 254                                 /* all unused desc entries get hw null ptr */
 255                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 256                                 continue;
 257                         }
 258                         if (!ps_page->page) {
 259                                 ps_page->page = alloc_page(GFP_ATOMIC);
 260                                 if (!ps_page->page) {
 261                                         adapter->alloc_rx_buff_failed++;
 262                                         goto no_buffers;
 263                                 }
 264                                 ps_page->dma = pci_map_page(pdev,
 265                                                    ps_page->page,
 266                                                    0, PAGE_SIZE,
 267                                                    PCI_DMA_FROMDEVICE);
 268                                 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
 269                                         dev_err(&adapter->pdev->dev,
 270                                           "RX DMA page map failed\n");
 271                                         adapter->rx_dma_failed++;
 272                                         goto no_buffers;
 273                                 }
 274                         }
 275                         /*
 276                          * Refresh the desc even if buffer_addrs
 277                          * didn't change because each write-back
 278                          * erases this info.
 279                          */
 280                         rx_desc->read.buffer_addr[j+1] =
 281                              cpu_to_le64(ps_page->dma);
 282                 }
 283
 284                 skb = netdev_alloc_skb(netdev,
 285                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
 286
 287                 if (!skb) {
 288                         adapter->alloc_rx_buff_failed++;
 289                         break;
 290                 }
 291
 292                 /*
 293                  * Make buffer alignment 2 beyond a 16 byte boundary
 294                  * this will result in a 16 byte aligned IP header after
 295                  * the 14 byte MAC header is removed
 296                  */
 297                 skb_reserve(skb, NET_IP_ALIGN);
 298
 299                 buffer_info->skb = skb;
 300                 buffer_info->dma = pci_map_single(pdev, skb->data,
 301                                                   adapter->rx_ps_bsize0,
 302                                                   PCI_DMA_FROMDEVICE);
 303                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 304                         dev_err(&pdev->dev, "RX DMA map failed\n");
 305                         adapter->rx_dma_failed++;
 306                         /* cleanup skb */
 307                         dev_kfree_skb_any(skb);
 308                         buffer_info->skb = NULL;
 309                         break;
 310                 }
 311
 312                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 313
 314                 i++;
 315                 if (i == rx_ring->count)
 316                         i = 0;
 317                 buffer_info = &rx_ring->buffer_info[i];
 318         }
 319
 320 no_buffers:
 321         if (rx_ring->next_to_use != i) {
 322                 rx_ring->next_to_use = i;
 323
 324                 if (!(i--))
 325                         i = (rx_ring->count - 1);
 326
 327                 /*
 328                  * Force memory writes to complete before letting h/w
 329                  * know there are new descriptors to fetch.  (Only
 330                  * applicable for weak-ordered memory model archs,
 331                  * such as IA-64).
 332                  */
 333                 wmb();
 334                 /*
 335                  * Hardware increments by 16 bytes, but packet split
 336                  * descriptors are 32 bytes...so we increment tail
 337                  * twice as much.
 338                  */
 339                 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 340         }
 341 }
 342
 343 /**
 344  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 345  * @adapter: address of board private structure
 346  * @rx_ring: pointer to receive ring structure
 347  * @cleaned_count: number of buffers to allocate this pass
 348  **/
 349
 350 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 351                                          int cleaned_count)
 352 {
 353         struct net_device *netdev = adapter->netdev;
 354         struct pci_dev *pdev = adapter->pdev;
 355         struct e1000_rx_desc *rx_desc;
 356         struct e1000_ring *rx_ring = adapter->rx_ring;
 357         struct e1000_buffer *buffer_info;
 358         struct sk_buff *skb;
 359         unsigned int i;
 360         unsigned int bufsz = 256 -
 361                              16 /* for skb_reserve */ -
 362                              NET_IP_ALIGN;
 363
 364         i = rx_ring->next_to_use;
 365         buffer_info = &rx_ring->buffer_info[i];
 366
 367         while (cleaned_count--) {
 368                 skb = buffer_info->skb;
 369                 if (skb) {
 370                         skb_trim(skb, 0);
 371                         goto check_page;
 372                 }
 373
 374                 skb = netdev_alloc_skb(netdev, bufsz);
 375                 if (unlikely(!skb)) {
 376                         /* Better luck next round */
 377                         adapter->alloc_rx_buff_failed++;
 378                         break;
 379                 }
 380
 381                 /* Make buffer alignment 2 beyond a 16 byte boundary
 382                  * this will result in a 16 byte aligned IP header after
 383                  * the 14 byte MAC header is removed
 384                  */
 385                 skb_reserve(skb, NET_IP_ALIGN);
 386
 387                 buffer_info->skb = skb;
 388 check_page:
 389                 /* allocate a new page if necessary */
 390                 if (!buffer_info->page) {
 391                         buffer_info->page = alloc_page(GFP_ATOMIC);
 392                         if (unlikely(!buffer_info->page)) {
 393                                 adapter->alloc_rx_buff_failed++;
 394                                 break;
 395                         }
 396                 }
 397
 398                 if (!buffer_info->dma)
 399                         buffer_info->dma = pci_map_page(pdev,
 400                                                         buffer_info->page, 0,
 401                                                         PAGE_SIZE,
 402                                                         PCI_DMA_FROMDEVICE);
 403
 404                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 405                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 406
 407                 if (unlikely(++i == rx_ring->count))
 408                         i = 0;
 409                 buffer_info = &rx_ring->buffer_info[i];
 410         }
 411
 412         if (likely(rx_ring->next_to_use != i)) {
 413                 rx_ring->next_to_use = i;
 414                 if (unlikely(i-- == 0))
 415                         i = (rx_ring->count - 1);
 416
 417                 /* Force memory writes to complete before letting h/w
 418                  * know there are new descriptors to fetch.  (Only
 419                  * applicable for weak-ordered memory model archs,
 420                  * such as IA-64). */
 421                 wmb();
 422                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 423         }
 424 }
 425
 426 /**
 427  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 428  * @adapter: board private structure
 429  *
 430  * the return value indicates whether actual cleaning was done, there
 431  * is no guarantee that everything was cleaned
 432  **/
 433 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 434                                int *work_done, int work_to_do)
 435 {
 436         struct net_device *netdev = adapter->netdev;
 437         struct pci_dev *pdev = adapter->pdev;
 438         struct e1000_ring *rx_ring = adapter->rx_ring;
 439         struct e1000_rx_desc *rx_desc, *next_rxd;
 440         struct e1000_buffer *buffer_info, *next_buffer;
 441         u32 length;
 442         unsigned int i;
 443         int cleaned_count = 0;
 444         bool cleaned = 0;
 445         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 446
 447         i = rx_ring->next_to_clean;
 448         rx_desc = E1000_RX_DESC(*rx_ring, i);
 449         buffer_info = &rx_ring->buffer_info[i];
 450
 451         while (rx_desc->status & E1000_RXD_STAT_DD) {
 452                 struct sk_buff *skb;
 453                 u8 status;
 454
 455                 if (*work_done >= work_to_do)
 456                         break;
 457                 (*work_done)++;
 458
 459                 status = rx_desc->status;
 460                 skb = buffer_info->skb;
 461                 buffer_info->skb = NULL;
 462
 463                 prefetch(skb->data - NET_IP_ALIGN);
 464
 465                 i++;
 466                 if (i == rx_ring->count)
 467                         i = 0;
 468                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 469                 prefetch(next_rxd);
 470
 471                 next_buffer = &rx_ring->buffer_info[i];
 472
 473                 cleaned = 1;
 474                 cleaned_count++;
 475                 pci_unmap_single(pdev,
 476                                  buffer_info->dma,
 477                                  adapter->rx_buffer_len,
 478                                  PCI_DMA_FROMDEVICE);
 479                 buffer_info->dma = 0;
 480
 481                 length = le16_to_cpu(rx_desc->length);
 482
 483                 /* !EOP means multiple descriptors were used to store a single
 484                  * packet, also make sure the frame isn't just CRC only */
 485                 if (!(status & E1000_RXD_STAT_EOP) || (length <= 4)) {
 486                         /* All receives must fit into a single buffer */
 487                         e_dbg("%s: Receive packet consumed multiple buffers\n",
 488                               netdev->name);
 489                         /* recycle */
 490                         buffer_info->skb = skb;
 491                         goto next_desc;
 492                 }
 493
 494                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 495                         /* recycle */
 496                         buffer_info->skb = skb;
 497                         goto next_desc;
 498                 }
 499
 500                 total_rx_bytes += length;
 501                 total_rx_packets++;
 502
 503                 /*
 504                  * code added for copybreak, this should improve
 505                  * performance for small packets with large amounts
 506                  * of reassembly being done in the stack
 507                  */
 508                 if (length < copybreak) {
 509                         struct sk_buff *new_skb =
 510                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
 511                         if (new_skb) {
 512                                 skb_reserve(new_skb, NET_IP_ALIGN);
 513                                 skb_copy_to_linear_data_offset(new_skb,
 514                                                                -NET_IP_ALIGN,
 515                                                                (skb->data -
 516                                                                 NET_IP_ALIGN),
 517                                                                (length +
 518                                                                 NET_IP_ALIGN));
 519                                 /* save the skb in buffer_info as good */
 520                                 buffer_info->skb = skb;
 521                                 skb = new_skb;
 522                         }
 523                         /* else just continue with the old one */
 524                 }
 525                 /* end copybreak code */
 526                 skb_put(skb, length);
 527
 528                 /* Receive Checksum Offload */
 529                 e1000_rx_checksum(adapter,
 530                                   (u32)(status) |
 531                                   ((u32)(rx_desc->errors) << 24),
 532                                   le16_to_cpu(rx_desc->csum), skb);
 533
 534                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 535
 536 next_desc:
 537                 rx_desc->status = 0;
 538
 539                 /* return some buffers to hardware, one at a time is too slow */
 540                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 541                         adapter->alloc_rx_buf(adapter, cleaned_count);
 542                         cleaned_count = 0;
 543                 }
 544
 545                 /* use prefetched values */
 546                 rx_desc = next_rxd;
 547                 buffer_info = next_buffer;
 548         }
 549         rx_ring->next_to_clean = i;
 550
 551         cleaned_count = e1000_desc_unused(rx_ring);
 552         if (cleaned_count)
 553                 adapter->alloc_rx_buf(adapter, cleaned_count);
 554
 555         adapter->total_rx_bytes += total_rx_bytes;
 556         adapter->total_rx_packets += total_rx_packets;
 557         adapter->net_stats.rx_bytes += total_rx_bytes;
 558         adapter->net_stats.rx_packets += total_rx_packets;
 559         return cleaned;
 560 }
 561
 562 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 563                              struct e1000_buffer *buffer_info)
 564 {
 565         if (buffer_info->dma) {
 566                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 567                                buffer_info->length, PCI_DMA_TODEVICE);
 568                 buffer_info->dma = 0;
 569         }
 570         if (buffer_info->skb) {
 571                 dev_kfree_skb_any(buffer_info->skb);
 572                 buffer_info->skb = NULL;
 573         }
 574 }
 575
 576 static void e1000_print_tx_hang(struct e1000_adapter *adapter)
 577 {
 578         struct e1000_ring *tx_ring = adapter->tx_ring;
 579         unsigned int i = tx_ring->next_to_clean;
 580         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 581         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 582
 583         /* detected Tx unit hang */
 584         e_err("Detected Tx Unit Hang:\n"
 585               "  TDH                  <%x>\n"
 586               "  TDT                  <%x>\n"
 587               "  next_to_use          <%x>\n"
 588               "  next_to_clean        <%x>\n"
 589               "buffer_info[next_to_clean]:\n"
 590               "  time_stamp           <%lx>\n"
 591               "  next_to_watch        <%x>\n"
 592               "  jiffies              <%lx>\n"
 593               "  next_to_watch.status <%x>\n",
 594               readl(adapter->hw.hw_addr + tx_ring->head),
 595               readl(adapter->hw.hw_addr + tx_ring->tail),
 596               tx_ring->next_to_use,
 597               tx_ring->next_to_clean,
 598               tx_ring->buffer_info[eop].time_stamp,
 599               eop,
 600               jiffies,
 601               eop_desc->upper.fields.status);
 602 }
 603
 604 /**
 605  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 606  * @adapter: board private structure
 607  *
 608  * the return value indicates whether actual cleaning was done, there
 609  * is no guarantee that everything was cleaned
 610  **/
 611 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 612 {
 613         struct net_device *netdev = adapter->netdev;
 614         struct e1000_hw *hw = &adapter->hw;
 615         struct e1000_ring *tx_ring = adapter->tx_ring;
 616         struct e1000_tx_desc *tx_desc, *eop_desc;
 617         struct e1000_buffer *buffer_info;
 618         unsigned int i, eop;
 619         unsigned int count = 0;
 620         bool cleaned = 0;
 621         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 622
 623         i = tx_ring->next_to_clean;
 624         eop = tx_ring->buffer_info[i].next_to_watch;
 625         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 626
 627         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
 628                 for (cleaned = 0; !cleaned; ) {
 629                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 630                         buffer_info = &tx_ring->buffer_info[i];
 631                         cleaned = (i == eop);
 632
 633                         if (cleaned) {
 634                                 struct sk_buff *skb = buffer_info->skb;
 635                                 unsigned int segs, bytecount;
 636                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 637                                 /* multiply data chunks by size of headers */
 638                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 639                                             skb->len;
 640                                 total_tx_packets += segs;
 641                                 total_tx_bytes += bytecount;
 642                         }
 643
 644                         e1000_put_txbuf(adapter, buffer_info);
 645                         tx_desc->upper.data = 0;
 646
 647                         i++;
 648                         if (i == tx_ring->count)
 649                                 i = 0;
 650                 }
 651
 652                 eop = tx_ring->buffer_info[i].next_to_watch;
 653                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
 654 #define E1000_TX_WEIGHT 64
 655                 /* weight of a sort for tx, to avoid endless transmit cleanup */
 656                 if (count++ == E1000_TX_WEIGHT)
 657                         break;
 658         }
 659
 660         tx_ring->next_to_clean = i;
 661
 662 #define TX_WAKE_THRESHOLD 32
 663         if (cleaned && netif_carrier_ok(netdev) &&
 664                      e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
 665                 /* Make sure that anybody stopping the queue after this
 666                  * sees the new next_to_clean.
 667                  */
 668                 smp_mb();
 669
 670                 if (netif_queue_stopped(netdev) &&
 671                     !(test_bit(__E1000_DOWN, &adapter->state))) {
 672                         netif_wake_queue(netdev);
 673                         ++adapter->restart_queue;
 674                 }
 675         }
 676
 677         if (adapter->detect_tx_hung) {
 678                 /*
 679                  * Detect a transmit hang in hardware, this serializes the
 680                  * check with the clearing of time_stamp and movement of i
 681                  */
 682                 adapter->detect_tx_hung = 0;
 683                 if (tx_ring->buffer_info[eop].dma &&
 684                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp
 685                                + (adapter->tx_timeout_factor * HZ))
 686                     && !(er32(STATUS) & E1000_STATUS_TXOFF)) {
 687                         e1000_print_tx_hang(adapter);
 688                         netif_stop_queue(netdev);
 689                 }
 690         }
 691         adapter->total_tx_bytes += total_tx_bytes;
 692         adapter->total_tx_packets += total_tx_packets;
 693         adapter->net_stats.tx_bytes += total_tx_bytes;
 694         adapter->net_stats.tx_packets += total_tx_packets;
 695         return cleaned;
 696 }
 697
 698 /**
 699  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
 700  * @adapter: board private structure
 701  *
 702  * the return value indicates whether actual cleaning was done, there
 703  * is no guarantee that everything was cleaned
 704  **/
 705 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 706                                   int *work_done, int work_to_do)
 707 {
 708         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
 709         struct net_device *netdev = adapter->netdev;
 710         struct pci_dev *pdev = adapter->pdev;
 711         struct e1000_ring *rx_ring = adapter->rx_ring;
 712         struct e1000_buffer *buffer_info, *next_buffer;
 713         struct e1000_ps_page *ps_page;
 714         struct sk_buff *skb;
 715         unsigned int i, j;
 716         u32 length, staterr;
 717         int cleaned_count = 0;
 718         bool cleaned = 0;
 719         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 720
 721         i = rx_ring->next_to_clean;
 722         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 723         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 724         buffer_info = &rx_ring->buffer_info[i];
 725
 726         while (staterr & E1000_RXD_STAT_DD) {
 727                 if (*work_done >= work_to_do)
 728                         break;
 729                 (*work_done)++;
 730                 skb = buffer_info->skb;
 731
 732                 /* in the packet split case this is header only */
 733                 prefetch(skb->data - NET_IP_ALIGN);
 734
 735                 i++;
 736                 if (i == rx_ring->count)
 737                         i = 0;
 738                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
 739                 prefetch(next_rxd);
 740
 741                 next_buffer = &rx_ring->buffer_info[i];
 742
 743                 cleaned = 1;
 744                 cleaned_count++;
 745                 pci_unmap_single(pdev, buffer_info->dma,
 746                                  adapter->rx_ps_bsize0,
 747                                  PCI_DMA_FROMDEVICE);
 748                 buffer_info->dma = 0;
 749
 750                 if (!(staterr & E1000_RXD_STAT_EOP)) {
 751                         e_dbg("%s: Packet Split buffers didn't pick up the "
 752                               "full packet\n", netdev->name);
 753                         dev_kfree_skb_irq(skb);
 754                         goto next_desc;
 755                 }
 756
 757                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 758                         dev_kfree_skb_irq(skb);
 759                         goto next_desc;
 760                 }
 761
 762                 length = le16_to_cpu(rx_desc->wb.middle.length0);
 763
 764                 if (!length) {
 765                         e_dbg("%s: Last part of the packet spanning multiple "
 766                               "descriptors\n", netdev->name);
 767                         dev_kfree_skb_irq(skb);
 768                         goto next_desc;
 769                 }
 770
 771                 /* Good Receive */
 772                 skb_put(skb, length);
 773
 774                 {
 775                 /*
 776                  * this looks ugly, but it seems compiler issues make it
 777                  * more efficient than reusing j
 778                  */
 779                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
 780
 781                 /*
 782                  * page alloc/put takes too long and effects small packet
 783                  * throughput, so unsplit small packets and save the alloc/put
 784                  * only valid in softirq (napi) context to call kmap_*
 785                  */
 786                 if (l1 && (l1 <= copybreak) &&
 787                     ((length + l1) <= adapter->rx_ps_bsize0)) {
 788                         u8 *vaddr;
 789
 790                         ps_page = &buffer_info->ps_pages[0];
 791
 792                         /*
 793                          * there is no documentation about how to call
 794                          * kmap_atomic, so we can't hold the mapping
 795                          * very long
 796                          */
 797                         pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
 798                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 799                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
 800                         memcpy(skb_tail_pointer(skb), vaddr, l1);
 801                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
 802                         pci_dma_sync_single_for_device(pdev, ps_page->dma,
 803                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 804
 805                         skb_put(skb, l1);
 806                         goto copydone;
 807                 } /* if */
 808                 }
 809
 810                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 811                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
 812                         if (!length)
 813                                 break;
 814
 815                         ps_page = &buffer_info->ps_pages[j];
 816                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 817                                        PCI_DMA_FROMDEVICE);
 818                         ps_page->dma = 0;
 819                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
 820                         ps_page->page = NULL;
 821                         skb->len += length;
 822                         skb->data_len += length;
 823                         skb->truesize += length;
 824                 }
 825
 826 copydone:
 827                 total_rx_bytes += skb->len;
 828                 total_rx_packets++;
 829
 830                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
 831                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
 832
 833                 if (rx_desc->wb.upper.header_status &
 834                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
 835                         adapter->rx_hdr_split++;
 836
 837                 e1000_receive_skb(adapter, netdev, skb,
 838                                   staterr, rx_desc->wb.middle.vlan);
 839
 840 next_desc:
 841                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
 842                 buffer_info->skb = NULL;
 843
 844                 /* return some buffers to hardware, one at a time is too slow */
 845                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 846                         adapter->alloc_rx_buf(adapter, cleaned_count);
 847                         cleaned_count = 0;
 848                 }
 849
 850                 /* use prefetched values */
 851                 rx_desc = next_rxd;
 852                 buffer_info = next_buffer;
 853
 854                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 855         }
 856         rx_ring->next_to_clean = i;
 857
 858         cleaned_count = e1000_desc_unused(rx_ring);
 859         if (cleaned_count)
 860                 adapter->alloc_rx_buf(adapter, cleaned_count);
 861
 862         adapter->total_rx_bytes += total_rx_bytes;
 863         adapter->total_rx_packets += total_rx_packets;
 864         adapter->net_stats.rx_bytes += total_rx_bytes;
 865         adapter->net_stats.rx_packets += total_rx_packets;
 866         return cleaned;
 867 }
 868
 869 /**
 870  * e1000_consume_page - helper function
 871  **/
 872 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
 873                                u16 length)
 874 {
 875         bi->page = NULL;
 876         skb->len += length;
 877         skb->data_len += length;
 878         skb->truesize += length;
 879 }
 880
 881 /**
 882  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
 883  * @adapter: board private structure
 884  *
 885  * the return value indicates whether actual cleaning was done, there
 886  * is no guarantee that everything was cleaned
 887  **/
 888
 889 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
 890                                      int *work_done, int work_to_do)
 891 {
 892         struct net_device *netdev = adapter->netdev;
 893         struct pci_dev *pdev = adapter->pdev;
 894         struct e1000_ring *rx_ring = adapter->rx_ring;
 895         struct e1000_rx_desc *rx_desc, *next_rxd;
 896         struct e1000_buffer *buffer_info, *next_buffer;
 897         u32 length;
 898         unsigned int i;
 899         int cleaned_count = 0;
 900         bool cleaned = false;
 901         unsigned int total_rx_bytes=0, total_rx_packets=0;
 902
 903         i = rx_ring->next_to_clean;
 904         rx_desc = E1000_RX_DESC(*rx_ring, i);
 905         buffer_info = &rx_ring->buffer_info[i];
 906
 907         while (rx_desc->status & E1000_RXD_STAT_DD) {
 908                 struct sk_buff *skb;
 909                 u8 status;
 910
 911                 if (*work_done >= work_to_do)
 912                         break;
 913                 (*work_done)++;
 914
 915                 status = rx_desc->status;
 916                 skb = buffer_info->skb;
 917                 buffer_info->skb = NULL;
 918
 919                 ++i;
 920                 if (i == rx_ring->count)
 921                         i = 0;
 922                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 923                 prefetch(next_rxd);
 924
 925                 next_buffer = &rx_ring->buffer_info[i];
 926
 927                 cleaned = true;
 928                 cleaned_count++;
 929                 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
 930                                PCI_DMA_FROMDEVICE);
 931                 buffer_info->dma = 0;
 932
 933                 length = le16_to_cpu(rx_desc->length);
 934
 935                 /* errors is only valid for DD + EOP descriptors */
 936                 if (unlikely((status & E1000_RXD_STAT_EOP) &&
 937                     (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
 938                                 /* recycle both page and skb */
 939                                 buffer_info->skb = skb;
 940                                 /* an error means any chain goes out the window
 941                                  * too */
 942                                 if (rx_ring->rx_skb_top)
 943                                         dev_kfree_skb(rx_ring->rx_skb_top);
 944                                 rx_ring->rx_skb_top = NULL;
 945                                 goto next_desc;
 946                 }
 947
 948 #define rxtop rx_ring->rx_skb_top
 949                 if (!(status & E1000_RXD_STAT_EOP)) {
 950                         /* this descriptor is only the beginning (or middle) */
 951                         if (!rxtop) {
 952                                 /* this is the beginning of a chain */
 953                                 rxtop = skb;
 954                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
 955                                                    0, length);
 956                         } else {
 957                                 /* this is the middle of a chain */
 958                                 skb_fill_page_desc(rxtop,
 959                                     skb_shinfo(rxtop)->nr_frags,
 960                                     buffer_info->page, 0, length);
 961                                 /* re-use the skb, only consumed the page */
 962                                 buffer_info->skb = skb;
 963                         }
 964                         e1000_consume_page(buffer_info, rxtop, length);
 965                         goto next_desc;
 966                 } else {
 967                         if (rxtop) {
 968                                 /* end of the chain */
 969                                 skb_fill_page_desc(rxtop,
 970                                     skb_shinfo(rxtop)->nr_frags,
 971                                     buffer_info->page, 0, length);
 972                                 /* re-use the current skb, we only consumed the
 973                                  * page */
 974                                 buffer_info->skb = skb;
 975                                 skb = rxtop;
 976                                 rxtop = NULL;
 977                                 e1000_consume_page(buffer_info, skb, length);
 978                         } else {
 979                                 /* no chain, got EOP, this buf is the packet
 980                                  * copybreak to save the put_page/alloc_page */
 981                                 if (length <= copybreak &&
 982                                     skb_tailroom(skb) >= length) {
 983                                         u8 *vaddr;
 984                                         vaddr = kmap_atomic(buffer_info->page,
 985                                                            KM_SKB_DATA_SOFTIRQ);
 986                                         memcpy(skb_tail_pointer(skb), vaddr,
 987                                                length);
 988                                         kunmap_atomic(vaddr,
 989                                                       KM_SKB_DATA_SOFTIRQ);
 990                                         /* re-use the page, so don't erase
 991                                          * buffer_info->page */
 992                                         skb_put(skb, length);
 993                                 } else {
 994                                         skb_fill_page_desc(skb, 0,
 995                                                            buffer_info->page, 0,
 996                                                            length);
 997                                         e1000_consume_page(buffer_info, skb,
 998                                                            length);
 999                                 }
1000                         }
1001                 }
1002
1003                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1004                 e1000_rx_checksum(adapter,
1005                                   (u32)(status) |
1006                                   ((u32)(rx_desc->errors) << 24),
1007                                   le16_to_cpu(rx_desc->csum), skb);
1008
1009                 /* probably a little skewed due to removing CRC */
1010                 total_rx_bytes += skb->len;
1011                 total_rx_packets++;
1012
1013                 /* eth type trans needs skb->data to point to something */
1014                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1015                         e_err("pskb_may_pull failed.\n");
1016                         dev_kfree_skb(skb);
1017                         goto next_desc;
1018                 }
1019
1020                 e1000_receive_skb(adapter, netdev, skb, status,
1021                                   rx_desc->special);
1022
1023 next_desc:
1024                 rx_desc->status = 0;
1025
1026                 /* return some buffers to hardware, one at a time is too slow */
1027                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1028                         adapter->alloc_rx_buf(adapter, cleaned_count);
1029                         cleaned_count = 0;
1030                 }
1031
1032                 /* use prefetched values */
1033                 rx_desc = next_rxd;
1034                 buffer_info = next_buffer;
1035         }
1036         rx_ring->next_to_clean = i;
1037
1038         cleaned_count = e1000_desc_unused(rx_ring);
1039         if (cleaned_count)
1040                 adapter->alloc_rx_buf(adapter, cleaned_count);
1041
1042         adapter->total_rx_bytes += total_rx_bytes;
1043         adapter->total_rx_packets += total_rx_packets;
1044         adapter->net_stats.rx_bytes += total_rx_bytes;
1045         adapter->net_stats.rx_packets += total_rx_packets;
1046         return cleaned;
1047 }
1048
1049 /**
1050  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1051  * @adapter: board private structure
1052  **/
1053 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1054 {
1055         struct e1000_ring *rx_ring = adapter->rx_ring;
1056         struct e1000_buffer *buffer_info;
1057         struct e1000_ps_page *ps_page;
1058         struct pci_dev *pdev = adapter->pdev;
1059         unsigned int i, j;
1060
1061         /* Free all the Rx ring sk_buffs */
1062         for (i = 0; i < rx_ring->count; i++) {
1063                 buffer_info = &rx_ring->buffer_info[i];
1064                 if (buffer_info->dma) {
1065                         if (adapter->clean_rx == e1000_clean_rx_irq)
1066                                 pci_unmap_single(pdev, buffer_info->dma,
1067                                                  adapter->rx_buffer_len,
1068                                                  PCI_DMA_FROMDEVICE);
1069                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1070                                 pci_unmap_page(pdev, buffer_info->dma,
1071                                                PAGE_SIZE,
1072                                                PCI_DMA_FROMDEVICE);
1073                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1074                                 pci_unmap_single(pdev, buffer_info->dma,
1075                                                  adapter->rx_ps_bsize0,
1076                                                  PCI_DMA_FROMDEVICE);
1077                         buffer_info->dma = 0;
1078                 }
1079
1080                 if (buffer_info->page) {
1081                         put_page(buffer_info->page);
1082                         buffer_info->page = NULL;
1083                 }
1084
1085                 if (buffer_info->skb) {
1086                         dev_kfree_skb(buffer_info->skb);
1087                         buffer_info->skb = NULL;
1088                 }
1089
1090                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1091                         ps_page = &buffer_info->ps_pages[j];
1092                         if (!ps_page->page)
1093                                 break;
1094                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1095                                        PCI_DMA_FROMDEVICE);
1096                         ps_page->dma = 0;
1097                         put_page(ps_page->page);
1098                         ps_page->page = NULL;
1099                 }
1100         }
1101
1102         /* there also may be some cached data from a chained receive */
1103         if (rx_ring->rx_skb_top) {
1104                 dev_kfree_skb(rx_ring->rx_skb_top);
1105                 rx_ring->rx_skb_top = NULL;
1106         }
1107
1108         /* Zero out the descriptor ring */
1109         memset(rx_ring->desc, 0, rx_ring->size);
1110
1111         rx_ring->next_to_clean = 0;
1112         rx_ring->next_to_use = 0;
1113
1114         writel(0, adapter->hw.hw_addr + rx_ring->head);
1115         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1116 }
1117
1118 static void e1000e_downshift_workaround(struct work_struct *work)
1119 {
1120         struct e1000_adapter *adapter = container_of(work,
1121                                         struct e1000_adapter, downshift_task);
1122
1123         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1124 }
1125
1126 /**
1127  * e1000_intr_msi - Interrupt Handler
1128  * @irq: interrupt number
1129  * @data: pointer to a network interface device structure
1130  **/
1131 static irqreturn_t e1000_intr_msi(int irq, void *data)
1132 {
1133         struct net_device *netdev = data;
1134         struct e1000_adapter *adapter = netdev_priv(netdev);
1135         struct e1000_hw *hw = &adapter->hw;
1136         u32 icr = er32(ICR);
1137
1138         /*
1139          * read ICR disables interrupts using IAM
1140          */
1141
1142         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
1143                 hw->mac.get_link_status = 1;
1144                 /*
1145                  * ICH8 workaround-- Call gig speed drop workaround on cable
1146                  * disconnect (LSC) before accessing any PHY registers
1147                  */
1148                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1149                     (!(er32(STATUS) & E1000_STATUS_LU)))
1150                         schedule_work(&adapter->downshift_task);
1151
1152                 /*
1153                  * 80003ES2LAN workaround-- For packet buffer work-around on
1154                  * link down event; disable receives here in the ISR and reset
1155                  * adapter in watchdog
1156                  */
1157                 if (netif_carrier_ok(netdev) &&
1158                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1159                         /* disable receives */
1160                         u32 rctl = er32(RCTL);
1161                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1162                         adapter->flags |= FLAG_RX_RESTART_NOW;
1163                 }
1164                 /* guard against interrupt when we're going down */
1165                 if (!test_bit(__E1000_DOWN, &adapter->state))
1166                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1167         }
1168
1169         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1170                 adapter->total_tx_bytes = 0;
1171                 adapter->total_tx_packets = 0;
1172                 adapter->total_rx_bytes = 0;
1173                 adapter->total_rx_packets = 0;
1174                 __netif_rx_schedule(netdev, &adapter->napi);
1175         }
1176
1177         return IRQ_HANDLED;
1178 }
1179
1180 /**
1181  * e1000_intr - Interrupt Handler
1182  * @irq: interrupt number
1183  * @data: pointer to a network interface device structure
1184  **/
1185 static irqreturn_t e1000_intr(int irq, void *data)
1186 {
1187         struct net_device *netdev = data;
1188         struct e1000_adapter *adapter = netdev_priv(netdev);
1189         struct e1000_hw *hw = &adapter->hw;
1190
1191         u32 rctl, icr = er32(ICR);
1192         if (!icr)
1193                 return IRQ_NONE;  /* Not our interrupt */
1194
1195         /*
1196          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1197          * not set, then the adapter didn't send an interrupt
1198          */
1199         if (!(icr & E1000_ICR_INT_ASSERTED))
1200                 return IRQ_NONE;
1201
1202         /*
1203          * Interrupt Auto-Mask...upon reading ICR,
1204          * interrupts are masked.  No need for the
1205          * IMC write
1206          */
1207
1208         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
1209                 hw->mac.get_link_status = 1;
1210                 /*
1211                  * ICH8 workaround-- Call gig speed drop workaround on cable
1212                  * disconnect (LSC) before accessing any PHY registers
1213                  */
1214                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1215                     (!(er32(STATUS) & E1000_STATUS_LU)))
1216                         schedule_work(&adapter->downshift_task);
1217
1218                 /*
1219                  * 80003ES2LAN workaround--
1220                  * For packet buffer work-around on link down event;
1221                  * disable receives here in the ISR and
1222                  * reset adapter in watchdog
1223                  */
1224                 if (netif_carrier_ok(netdev) &&
1225                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1226                         /* disable receives */
1227                         rctl = er32(RCTL);
1228                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1229                         adapter->flags |= FLAG_RX_RESTART_NOW;
1230                 }
1231                 /* guard against interrupt when we're going down */
1232                 if (!test_bit(__E1000_DOWN, &adapter->state))
1233                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1234         }
1235
1236         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
1237                 adapter->total_tx_bytes = 0;
1238                 adapter->total_tx_packets = 0;
1239                 adapter->total_rx_bytes = 0;
1240                 adapter->total_rx_packets = 0;
1241                 __netif_rx_schedule(netdev, &adapter->napi);
1242         }
1243
1244         return IRQ_HANDLED;
1245 }
1246
1247 /**
1248  * e1000_request_irq - initialize interrupts
1249  *
1250  * Attempts to configure interrupts using the best available
1251  * capabilities of the hardware and kernel.
1252  **/
1253 static int e1000_request_irq(struct e1000_adapter *adapter)
1254 {
1255         struct net_device *netdev = adapter->netdev;
1256         int irq_flags = IRQF_SHARED;
1257         int err;
1258
1259         if (!(adapter->flags & FLAG_MSI_TEST_FAILED)) {
1260                 err = pci_enable_msi(adapter->pdev);
1261                 if (!err) {
1262                         adapter->flags |= FLAG_MSI_ENABLED;
1263                         irq_flags = 0;
1264                 }
1265         }
1266
1267         err = request_irq(adapter->pdev->irq,
1268                           ((adapter->flags & FLAG_MSI_ENABLED) ?
1269                                 &e1000_intr_msi : &e1000_intr),
1270                           irq_flags, netdev->name, netdev);
1271         if (err) {
1272                 if (adapter->flags & FLAG_MSI_ENABLED) {
1273                         pci_disable_msi(adapter->pdev);
1274                         adapter->flags &= ~FLAG_MSI_ENABLED;
1275                 }
1276                 e_err("Unable to allocate interrupt, Error: %d\n", err);
1277         }
1278
1279         return err;
1280 }
1281
1282 static void e1000_free_irq(struct e1000_adapter *adapter)
1283 {
1284         struct net_device *netdev = adapter->netdev;
1285
1286         free_irq(adapter->pdev->irq, netdev);
1287         if (adapter->flags & FLAG_MSI_ENABLED) {
1288                 pci_disable_msi(adapter->pdev);
1289                 adapter->flags &= ~FLAG_MSI_ENABLED;
1290         }
1291 }
1292
1293 /**
1294  * e1000_irq_disable - Mask off interrupt generation on the NIC
1295  **/
1296 static void e1000_irq_disable(struct e1000_adapter *adapter)
1297 {
1298         struct e1000_hw *hw = &adapter->hw;
1299
1300         ew32(IMC, ~0);
1301         e1e_flush();
1302         synchronize_irq(adapter->pdev->irq);
1303 }
1304
1305 /**
1306  * e1000_irq_enable - Enable default interrupt generation settings
1307  **/
1308 static void e1000_irq_enable(struct e1000_adapter *adapter)
1309 {
1310         struct e1000_hw *hw = &adapter->hw;
1311
1312         ew32(IMS, IMS_ENABLE_MASK);
1313         e1e_flush();
1314 }
1315
1316 /**
1317  * e1000_get_hw_control - get control of the h/w from f/w
1318  * @adapter: address of board private structure
1319  *
1320  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1321  * For ASF and Pass Through versions of f/w this means that
1322  * the driver is loaded. For AMT version (only with 82573)
1323  * of the f/w this means that the network i/f is open.
1324  **/
1325 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1326 {
1327         struct e1000_hw *hw = &adapter->hw;
1328         u32 ctrl_ext;
1329         u32 swsm;
1330
1331         /* Let firmware know the driver has taken over */
1332         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1333                 swsm = er32(SWSM);
1334                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1335         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1336                 ctrl_ext = er32(CTRL_EXT);
1337                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1338         }
1339 }
1340
1341 /**
1342  * e1000_release_hw_control - release control of the h/w to f/w
1343  * @adapter: address of board private structure
1344  *
1345  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1346  * For ASF and Pass Through versions of f/w this means that the
1347  * driver is no longer loaded. For AMT version (only with 82573) i
1348  * of the f/w this means that the network i/f is closed.
1349  *
1350  **/
1351 static void e1000_release_hw_control(struct e1000_adapter *adapter)
1352 {
1353         struct e1000_hw *hw = &adapter->hw;
1354         u32 ctrl_ext;
1355         u32 swsm;
1356
1357         /* Let firmware taken over control of h/w */
1358         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1359                 swsm = er32(SWSM);
1360                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1361         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1362                 ctrl_ext = er32(CTRL_EXT);
1363                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1364         }
1365 }
1366
1367 /**
1368  * @e1000_alloc_ring - allocate memory for a ring structure
1369  **/
1370 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1371                                 struct e1000_ring *ring)
1372 {
1373         struct pci_dev *pdev = adapter->pdev;
1374
1375         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1376                                         GFP_KERNEL);
1377         if (!ring->desc)
1378                 return -ENOMEM;
1379
1380         return 0;
1381 }
1382
1383 /**
1384  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1385  * @adapter: board private structure
1386  *
1387  * Return 0 on success, negative on failure
1388  **/
1389 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1390 {
1391         struct e1000_ring *tx_ring = adapter->tx_ring;
1392         int err = -ENOMEM, size;
1393
1394         size = sizeof(struct e1000_buffer) * tx_ring->count;
1395         tx_ring->buffer_info = vmalloc(size);
1396         if (!tx_ring->buffer_info)
1397                 goto err;
1398         memset(tx_ring->buffer_info, 0, size);
1399
1400         /* round up to nearest 4K */
1401         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1402         tx_ring->size = ALIGN(tx_ring->size, 4096);
1403
1404         err = e1000_alloc_ring_dma(adapter, tx_ring);
1405         if (err)
1406                 goto err;
1407
1408         tx_ring->next_to_use = 0;
1409         tx_ring->next_to_clean = 0;
1410         spin_lock_init(&adapter->tx_queue_lock);
1411
1412         return 0;
1413 err:
1414         vfree(tx_ring->buffer_info);
1415         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1416         return err;
1417 }
1418
1419 /**
1420  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1421  * @adapter: board private structure
1422  *
1423  * Returns 0 on success, negative on failure
1424  **/
1425 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1426 {
1427         struct e1000_ring *rx_ring = adapter->rx_ring;
1428         struct e1000_buffer *buffer_info;
1429         int i, size, desc_len, err = -ENOMEM;
1430
1431         size = sizeof(struct e1000_buffer) * rx_ring->count;
1432         rx_ring->buffer_info = vmalloc(size);
1433         if (!rx_ring->buffer_info)
1434                 goto err;
1435         memset(rx_ring->buffer_info, 0, size);
1436
1437         for (i = 0; i < rx_ring->count; i++) {
1438                 buffer_info = &rx_ring->buffer_info[i];
1439                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1440                                                 sizeof(struct e1000_ps_page),
1441                                                 GFP_KERNEL);
1442                 if (!buffer_info->ps_pages)
1443                         goto err_pages;
1444         }
1445
1446         desc_len = sizeof(union e1000_rx_desc_packet_split);
1447
1448         /* Round up to nearest 4K */
1449         rx_ring->size = rx_ring->count * desc_len;
1450         rx_ring->size = ALIGN(rx_ring->size, 4096);
1451
1452         err = e1000_alloc_ring_dma(adapter, rx_ring);
1453         if (err)
1454                 goto err_pages;
1455
1456         rx_ring->next_to_clean = 0;
1457         rx_ring->next_to_use = 0;
1458         rx_ring->rx_skb_top = NULL;
1459
1460         return 0;
1461
1462 err_pages:
1463         for (i = 0; i < rx_ring->count; i++) {
1464                 buffer_info = &rx_ring->buffer_info[i];
1465                 kfree(buffer_info->ps_pages);
1466         }
1467 err:
1468         vfree(rx_ring->buffer_info);
1469         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1470         return err;
1471 }
1472
1473 /**
1474  * e1000_clean_tx_ring - Free Tx Buffers
1475  * @adapter: board private structure
1476  **/
1477 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1478 {
1479         struct e1000_ring *tx_ring = adapter->tx_ring;
1480         struct e1000_buffer *buffer_info;
1481         unsigned long size;
1482         unsigned int i;
1483
1484         for (i = 0; i < tx_ring->count; i++) {
1485                 buffer_info = &tx_ring->buffer_info[i];
1486                 e1000_put_txbuf(adapter, buffer_info);
1487         }
1488
1489         size = sizeof(struct e1000_buffer) * tx_ring->count;
1490         memset(tx_ring->buffer_info, 0, size);
1491
1492         memset(tx_ring->desc, 0, tx_ring->size);
1493
1494         tx_ring->next_to_use = 0;
1495         tx_ring->next_to_clean = 0;
1496
1497         writel(0, adapter->hw.hw_addr + tx_ring->head);
1498         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1499 }
1500
1501 /**
1502  * e1000e_free_tx_resources - Free Tx Resources per Queue
1503  * @adapter: board private structure
1504  *
1505  * Free all transmit software resources
1506  **/
1507 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1508 {
1509         struct pci_dev *pdev = adapter->pdev;
1510         struct e1000_ring *tx_ring = adapter->tx_ring;
1511
1512         e1000_clean_tx_ring(adapter);
1513
1514         vfree(tx_ring->buffer_info);
1515         tx_ring->buffer_info = NULL;
1516
1517         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1518                           tx_ring->dma);
1519         tx_ring->desc = NULL;
1520 }
1521
1522 /**
1523  * e1000e_free_rx_resources - Free Rx Resources
1524  * @adapter: board private structure
1525  *
1526  * Free all receive software resources
1527  **/
1528
1529 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1530 {
1531         struct pci_dev *pdev = adapter->pdev;
1532         struct e1000_ring *rx_ring = adapter->rx_ring;
1533         int i;
1534
1535         e1000_clean_rx_ring(adapter);
1536
1537         for (i = 0; i < rx_ring->count; i++) {
1538                 kfree(rx_ring->buffer_info[i].ps_pages);
1539         }
1540
1541         vfree(rx_ring->buffer_info);
1542         rx_ring->buffer_info = NULL;
1543
1544         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1545                           rx_ring->dma);
1546         rx_ring->desc = NULL;
1547 }
1548
1549 /**
1550  * e1000_update_itr - update the dynamic ITR value based on statistics
1551  * @adapter: pointer to adapter
1552  * @itr_setting: current adapter->itr
1553  * @packets: the number of packets during this measurement interval
1554  * @bytes: the number of bytes during this measurement interval
1555  *
1556  *      Stores a new ITR value based on packets and byte
1557  *      counts during the last interrupt.  The advantage of per interrupt
1558  *      computation is faster updates and more accurate ITR for the current
1559  *      traffic pattern.  Constants in this function were computed
1560  *      based on theoretical maximum wire speed and thresholds were set based
1561  *      on testing data as well as attempting to minimize response time
1562  *      while increasing bulk throughput.
1563  *      this functionality is controlled by the InterruptThrottleRate module
1564  *      parameter (see e1000_param.c)
1565  **/
1566 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1567                                      u16 itr_setting, int packets,
1568                                      int bytes)
1569 {
1570         unsigned int retval = itr_setting;
1571
1572         if (packets == 0)
1573                 goto update_itr_done;
1574
1575         switch (itr_setting) {
1576         case lowest_latency:
1577                 /* handle TSO and jumbo frames */
1578                 if (bytes/packets > 8000)
1579                         retval = bulk_latency;
1580                 else if ((packets < 5) && (bytes > 512)) {
1581                         retval = low_latency;
1582                 }
1583                 break;
1584         case low_latency:  /* 50 usec aka 20000 ints/s */
1585                 if (bytes > 10000) {
1586                         /* this if handles the TSO accounting */
1587                         if (bytes/packets > 8000) {
1588                                 retval = bulk_latency;
1589                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1590                                 retval = bulk_latency;
1591                         } else if ((packets > 35)) {
1592                                 retval = lowest_latency;
1593                         }
1594                 } else if (bytes/packets > 2000) {
1595                         retval = bulk_latency;
1596                 } else if (packets <= 2 && bytes < 512) {
1597                         retval = lowest_latency;
1598                 }
1599                 break;
1600         case bulk_latency: /* 250 usec aka 4000 ints/s */
1601                 if (bytes > 25000) {
1602                         if (packets > 35) {
1603                                 retval = low_latency;
1604                         }
1605                 } else if (bytes < 6000) {
1606                         retval = low_latency;
1607                 }
1608                 break;
1609         }
1610
1611 update_itr_done:
1612         return retval;
1613 }
1614
1615 static void e1000_set_itr(struct e1000_adapter *adapter)
1616 {
1617         struct e1000_hw *hw = &adapter->hw;
1618         u16 current_itr;
1619         u32 new_itr = adapter->itr;
1620
1621         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1622         if (adapter->link_speed != SPEED_1000) {
1623                 current_itr = 0;
1624                 new_itr = 4000;
1625                 goto set_itr_now;
1626         }
1627
1628         adapter->tx_itr = e1000_update_itr(adapter,
1629                                     adapter->tx_itr,
1630                                     adapter->total_tx_packets,
1631                                     adapter->total_tx_bytes);
1632         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1633         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1634                 adapter->tx_itr = low_latency;
1635
1636         adapter->rx_itr = e1000_update_itr(adapter,
1637                                     adapter->rx_itr,
1638                                     adapter->total_rx_packets,
1639                                     adapter->total_rx_bytes);
1640         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1641         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1642                 adapter->rx_itr = low_latency;
1643
1644         current_itr = max(adapter->rx_itr, adapter->tx_itr);
1645
1646         switch (current_itr) {
1647         /* counts and packets in update_itr are dependent on these numbers */
1648         case lowest_latency:
1649                 new_itr = 70000;
1650                 break;
1651         case low_latency:
1652                 new_itr = 20000; /* aka hwitr = ~200 */
1653                 break;
1654         case bulk_latency:
1655                 new_itr = 4000;
1656                 break;
1657         default:
1658                 break;
1659         }
1660
1661 set_itr_now:
1662         if (new_itr != adapter->itr) {
1663                 /*
1664                  * this attempts to bias the interrupt rate towards Bulk
1665                  * by adding intermediate steps when interrupt rate is
1666                  * increasing
1667                  */
1668                 new_itr = new_itr > adapter->itr ?
1669                              min(adapter->itr + (new_itr >> 2), new_itr) :
1670                              new_itr;
1671                 adapter->itr = new_itr;
1672                 ew32(ITR, 1000000000 / (new_itr * 256));
1673         }
1674 }
1675
1676 /**
1677  * e1000_clean - NAPI Rx polling callback
1678  * @napi: struct associated with this polling callback
1679  * @budget: amount of packets driver is allowed to process this poll
1680  **/
1681 static int e1000_clean(struct napi_struct *napi, int budget)
1682 {
1683         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
1684         struct net_device *poll_dev = adapter->netdev;
1685         int tx_cleaned = 0, work_done = 0;
1686
1687         /* Must NOT use netdev_priv macro here. */
1688         adapter = poll_dev->priv;
1689
1690         /*
1691          * e1000_clean is called per-cpu.  This lock protects
1692          * tx_ring from being cleaned by multiple cpus
1693          * simultaneously.  A failure obtaining the lock means
1694          * tx_ring is currently being cleaned anyway.
1695          */
1696         if (spin_trylock(&adapter->tx_queue_lock)) {
1697                 tx_cleaned = e1000_clean_tx_irq(adapter);
1698                 spin_unlock(&adapter->tx_queue_lock);
1699         }
1700
1701         adapter->clean_rx(adapter, &work_done, budget);
1702
1703         if (tx_cleaned)
1704                 work_done = budget;
1705
1706         /* If budget not fully consumed, exit the polling mode */
1707         if (work_done < budget) {
1708                 if (adapter->itr_setting & 3)
1709                         e1000_set_itr(adapter);
1710                 netif_rx_complete(poll_dev, napi);
1711                 e1000_irq_enable(adapter);
1712         }
1713
1714         return work_done;
1715 }
1716
1717 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1718 {
1719         struct e1000_adapter *adapter = netdev_priv(netdev);
1720         struct e1000_hw *hw = &adapter->hw;
1721         u32 vfta, index;
1722
1723         /* don't update vlan cookie if already programmed */
1724         if ((adapter->hw.mng_cookie.status &
1725              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1726             (vid == adapter->mng_vlan_id))
1727                 return;
1728         /* add VID to filter table */
1729         index = (vid >> 5) & 0x7F;
1730         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
1731         vfta |= (1 << (vid & 0x1F));
1732         e1000e_write_vfta(hw, index, vfta);
1733 }
1734
1735 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1736 {
1737         struct e1000_adapter *adapter = netdev_priv(netdev);
1738         struct e1000_hw *hw = &adapter->hw;
1739         u32 vfta, index;
1740
1741         if (!test_bit(__E1000_DOWN, &adapter->state))
1742                 e1000_irq_disable(adapter);
1743         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1744
1745         if (!test_bit(__E1000_DOWN, &adapter->state))
1746                 e1000_irq_enable(adapter);
1747
1748         if ((adapter->hw.mng_cookie.status &
1749              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1750             (vid == adapter->mng_vlan_id)) {
1751                 /* release control to f/w */
1752                 e1000_release_hw_control(adapter);
1753                 return;
1754         }
1755
1756         /* remove VID from filter table */
1757         index = (vid >> 5) & 0x7F;
1758         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
1759         vfta &= ~(1 << (vid & 0x1F));
1760         e1000e_write_vfta(hw, index, vfta);
1761 }
1762
1763 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
1764 {
1765         struct net_device *netdev = adapter->netdev;
1766         u16 vid = adapter->hw.mng_cookie.vlan_id;
1767         u16 old_vid = adapter->mng_vlan_id;
1768
1769         if (!adapter->vlgrp)
1770                 return;
1771
1772         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
1773                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1774                 if (adapter->hw.mng_cookie.status &
1775                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
1776                         e1000_vlan_rx_add_vid(netdev, vid);
1777                         adapter->mng_vlan_id = vid;
1778                 }
1779
1780                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
1781                                 (vid != old_vid) &&
1782                     !vlan_group_get_device(adapter->vlgrp, old_vid))
1783                         e1000_vlan_rx_kill_vid(netdev, old_vid);
1784         } else {
1785                 adapter->mng_vlan_id = vid;
1786         }
1787 }
1788
1789
1790 static void e1000_vlan_rx_register(struct net_device *netdev,
1791                                    struct vlan_group *grp)
1792 {
1793         struct e1000_adapter *adapter = netdev_priv(netdev);
1794         struct e1000_hw *hw = &adapter->hw;
1795         u32 ctrl, rctl;
1796
1797         if (!test_bit(__E1000_DOWN, &adapter->state))
1798                 e1000_irq_disable(adapter);
1799         adapter->vlgrp = grp;
1800
1801         if (grp) {
1802                 /* enable VLAN tag insert/strip */
1803                 ctrl = er32(CTRL);
1804                 ctrl |= E1000_CTRL_VME;
1805                 ew32(CTRL, ctrl);
1806
1807                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
1808                         /* enable VLAN receive filtering */
1809                         rctl = er32(RCTL);
1810                         rctl &= ~E1000_RCTL_CFIEN;
1811                         ew32(RCTL, rctl);
1812                         e1000_update_mng_vlan(adapter);
1813                 }
1814         } else {
1815                 /* disable VLAN tag insert/strip */
1816                 ctrl = er32(CTRL);
1817                 ctrl &= ~E1000_CTRL_VME;
1818                 ew32(CTRL, ctrl);
1819
1820                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
1821                         if (adapter->mng_vlan_id !=
1822                             (u16)E1000_MNG_VLAN_NONE) {
1823                                 e1000_vlan_rx_kill_vid(netdev,
1824                                                        adapter->mng_vlan_id);
1825                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1826                         }
1827                 }
1828         }
1829
1830         if (!test_bit(__E1000_DOWN, &adapter->state))
1831                 e1000_irq_enable(adapter);
1832 }
1833
1834 static void e1000_restore_vlan(struct e1000_adapter *adapter)
1835 {
1836         u16 vid;
1837
1838         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1839
1840         if (!adapter->vlgrp)
1841                 return;
1842
1843         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1844                 if (!vlan_group_get_device(adapter->vlgrp, vid))
1845                         continue;
1846                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
1847         }
1848 }
1849
1850 static void e1000_init_manageability(struct e1000_adapter *adapter)
1851 {
1852         struct e1000_hw *hw = &adapter->hw;
1853         u32 manc, manc2h;
1854
1855         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
1856                 return;
1857
1858         manc = er32(MANC);
1859
1860         /*
1861          * enable receiving management packets to the host. this will probably
1862          * generate destination unreachable messages from the host OS, but
1863          * the packets will be handled on SMBUS
1864          */
1865         manc |= E1000_MANC_EN_MNG2HOST;
1866         manc2h = er32(MANC2H);
1867 #define E1000_MNG2HOST_PORT_623 (1 << 5)
1868 #define E1000_MNG2HOST_PORT_664 (1 << 6)
1869         manc2h |= E1000_MNG2HOST_PORT_623;
1870         manc2h |= E1000_MNG2HOST_PORT_664;
1871         ew32(MANC2H, manc2h);
1872         ew32(MANC, manc);
1873 }
1874
1875 /**
1876  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1877  * @adapter: board private structure
1878  *
1879  * Configure the Tx unit of the MAC after a reset.
1880  **/
1881 static void e1000_configure_tx(struct e1000_adapter *adapter)
1882 {
1883         struct e1000_hw *hw = &adapter->hw;
1884         struct e1000_ring *tx_ring = adapter->tx_ring;
1885         u64 tdba;
1886         u32 tdlen, tctl, tipg, tarc;
1887         u32 ipgr1, ipgr2;
1888
1889         /* Setup the HW Tx Head and Tail descriptor pointers */
1890         tdba = tx_ring->dma;
1891         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
1892         ew32(TDBAL, (tdba & DMA_32BIT_MASK));
1893         ew32(TDBAH, (tdba >> 32));
1894         ew32(TDLEN, tdlen);
1895         ew32(TDH, 0);
1896         ew32(TDT, 0);
1897         tx_ring->head = E1000_TDH;
1898         tx_ring->tail = E1000_TDT;
1899
1900         /* Set the default values for the Tx Inter Packet Gap timer */
1901         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
1902         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
1903         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
1904
1905         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
1906                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
1907
1908         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1909         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1910         ew32(TIPG, tipg);
1911
1912         /* Set the Tx Interrupt Delay register */
1913         ew32(TIDV, adapter->tx_int_delay);
1914         /* Tx irq moderation */
1915         ew32(TADV, adapter->tx_abs_int_delay);
1916
1917         /* Program the Transmit Control Register */
1918         tctl = er32(TCTL);
1919         tctl &= ~E1000_TCTL_CT;
1920         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1921                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1922
1923         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
1924                 tarc = er32(TARC(0));
1925                 /*
1926                  * set the speed mode bit, we'll clear it if we're not at
1927                  * gigabit link later
1928                  */
1929 #define SPEED_MODE_BIT (1 << 21)
1930                 tarc |= SPEED_MODE_BIT;
1931                 ew32(TARC(0), tarc);
1932         }
1933
1934         /* errata: program both queues to unweighted RR */
1935         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
1936                 tarc = er32(TARC(0));
1937                 tarc |= 1;
1938                 ew32(TARC(0), tarc);
1939                 tarc = er32(TARC(1));
1940                 tarc |= 1;
1941                 ew32(TARC(1), tarc);
1942         }
1943
1944         e1000e_config_collision_dist(hw);
1945
1946         /* Setup Transmit Descriptor Settings for eop descriptor */
1947         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1948
1949         /* only set IDE if we are delaying interrupts using the timers */
1950         if (adapter->tx_int_delay)
1951                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1952
1953         /* enable Report Status bit */
1954         adapter->txd_cmd |= E1000_TXD_CMD_RS;
1955
1956         ew32(TCTL, tctl);
1957
1958         adapter->tx_queue_len = adapter->netdev->tx_queue_len;
1959 }
1960
1961 /**
1962  * e1000_setup_rctl - configure the receive control registers
1963  * @adapter: Board private structure
1964  **/
1965 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1966                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1967 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1968 {
1969         struct e1000_hw *hw = &adapter->hw;
1970         u32 rctl, rfctl;
1971         u32 psrctl = 0;
1972         u32 pages = 0;
1973
1974         /* Program MC offset vector base */
1975         rctl = er32(RCTL);
1976         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1977         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1978                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1979                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1980
1981         /* Do not Store bad packets */
1982         rctl &= ~E1000_RCTL_SBP;
1983
1984         /* Enable Long Packet receive */
1985         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1986                 rctl &= ~E1000_RCTL_LPE;
1987         else
1988                 rctl |= E1000_RCTL_LPE;
1989
1990         /* Enable hardware CRC frame stripping */
1991         rctl |= E1000_RCTL_SECRC;
1992
1993         /* Setup buffer sizes */
1994         rctl &= ~E1000_RCTL_SZ_4096;
1995         rctl |= E1000_RCTL_BSEX;
1996         switch (adapter->rx_buffer_len) {
1997         case 256:
1998                 rctl |= E1000_RCTL_SZ_256;
1999                 rctl &= ~E1000_RCTL_BSEX;
2000                 break;
2001         case 512:
2002                 rctl |= E1000_RCTL_SZ_512;
2003                 rctl &= ~E1000_RCTL_BSEX;
2004                 break;
2005         case 1024:
2006                 rctl |= E1000_RCTL_SZ_1024;
2007                 rctl &= ~E1000_RCTL_BSEX;
2008                 break;
2009         case 2048:
2010         default:
2011                 rctl |= E1000_RCTL_SZ_2048;
2012                 rctl &= ~E1000_RCTL_BSEX;
2013                 break;
2014         case 4096:
2015                 rctl |= E1000_RCTL_SZ_4096;
2016                 break;
2017         case 8192:
2018                 rctl |= E1000_RCTL_SZ_8192;
2019                 break;
2020         case 16384:
2021                 rctl |= E1000_RCTL_SZ_16384;
2022                 break;
2023         }
2024
2025         /*
2026          * 82571 and greater support packet-split where the protocol
2027          * header is placed in skb->data and the packet data is
2028          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2029          * In the case of a non-split, skb->data is linearly filled,
2030          * followed by the page buffers.  Therefore, skb->data is
2031          * sized to hold the largest protocol header.
2032          *
2033          * allocations using alloc_page take too long for regular MTU
2034          * so only enable packet split for jumbo frames
2035          *
2036          * Using pages when the page size is greater than 16k wastes
2037          * a lot of memory, since we allocate 3 pages at all times
2038          * per packet.
2039          */
2040         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2041         if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2042             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2043                 adapter->rx_ps_pages = pages;
2044         else
2045                 adapter->rx_ps_pages = 0;
2046
2047         if (adapter->rx_ps_pages) {
2048                 /* Configure extra packet-split registers */
2049                 rfctl = er32(RFCTL);
2050                 rfctl |= E1000_RFCTL_EXTEN;
2051                 /*
2052                  * disable packet split support for IPv6 extension headers,
2053                  * because some malformed IPv6 headers can hang the Rx
2054                  */
2055                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2056                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2057
2058                 ew32(RFCTL, rfctl);
2059
2060                 /* Enable Packet split descriptors */
2061                 rctl |= E1000_RCTL_DTYP_PS;
2062
2063                 psrctl |= adapter->rx_ps_bsize0 >>
2064                         E1000_PSRCTL_BSIZE0_SHIFT;
2065
2066                 switch (adapter->rx_ps_pages) {
2067                 case 3:
2068                         psrctl |= PAGE_SIZE <<
2069                                 E1000_PSRCTL_BSIZE3_SHIFT;
2070                 case 2:
2071                         psrctl |= PAGE_SIZE <<
2072                                 E1000_PSRCTL_BSIZE2_SHIFT;
2073                 case 1:
2074                         psrctl |= PAGE_SIZE >>
2075                                 E1000_PSRCTL_BSIZE1_SHIFT;
2076                         break;
2077                 }
2078
2079                 ew32(PSRCTL, psrctl);
2080         }
2081
2082         ew32(RCTL, rctl);
2083         /* just started the receive unit, no need to restart */
2084         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2085 }
2086
2087 /**
2088  * e1000_configure_rx - Configure Receive Unit after Reset
2089  * @adapter: board private structure
2090  *
2091  * Configure the Rx unit of the MAC after a reset.
2092  **/
2093 static void e1000_configure_rx(struct e1000_adapter *adapter)
2094 {
2095         struct e1000_hw *hw = &adapter->hw;
2096         struct e1000_ring *rx_ring = adapter->rx_ring;
2097         u64 rdba;
2098         u32 rdlen, rctl, rxcsum, ctrl_ext;
2099
2100         if (adapter->rx_ps_pages) {
2101                 /* this is a 32 byte descriptor */
2102                 rdlen = rx_ring->count *
2103                         sizeof(union e1000_rx_desc_packet_split);
2104                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2105                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2106         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2107                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2108                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2109                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2110         } else {
2111                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2112                 adapter->clean_rx = e1000_clean_rx_irq;
2113                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2114         }
2115
2116         /* disable receives while setting up the descriptors */
2117         rctl = er32(RCTL);
2118         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2119         e1e_flush();
2120         msleep(10);
2121
2122         /* set the Receive Delay Timer Register */
2123         ew32(RDTR, adapter->rx_int_delay);
2124
2125         /* irq moderation */
2126         ew32(RADV, adapter->rx_abs_int_delay);
2127         if (adapter->itr_setting != 0)
2128                 ew32(ITR, 1000000000 / (adapter->itr * 256));
2129
2130         ctrl_ext = er32(CTRL_EXT);
2131         /* Reset delay timers after every interrupt */
2132         ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
2133         /* Auto-Mask interrupts upon ICR access */
2134         ctrl_ext |= E1000_CTRL_EXT_IAME;
2135         ew32(IAM, 0xffffffff);
2136         ew32(CTRL_EXT, ctrl_ext);
2137         e1e_flush();
2138
2139         /*
2140          * Setup the HW Rx Head and Tail Descriptor Pointers and
2141          * the Base and Length of the Rx Descriptor Ring
2142          */
2143         rdba = rx_ring->dma;
2144         ew32(RDBAL, (rdba & DMA_32BIT_MASK));
2145         ew32(RDBAH, (rdba >> 32));
2146         ew32(RDLEN, rdlen);
2147         ew32(RDH, 0);
2148         ew32(RDT, 0);
2149         rx_ring->head = E1000_RDH;
2150         rx_ring->tail = E1000_RDT;
2151
2152         /* Enable Receive Checksum Offload for TCP and UDP */
2153         rxcsum = er32(RXCSUM);
2154         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2155                 rxcsum |= E1000_RXCSUM_TUOFL;
2156
2157                 /*
2158                  * IPv4 payload checksum for UDP fragments must be
2159                  * used in conjunction with packet-split.
2160                  */
2161                 if (adapter->rx_ps_pages)
2162                         rxcsum |= E1000_RXCSUM_IPPCSE;
2163         } else {
2164                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2165                 /* no need to clear IPPCSE as it defaults to 0 */
2166         }
2167         ew32(RXCSUM, rxcsum);
2168
2169         /*
2170          * Enable early receives on supported devices, only takes effect when
2171          * packet size is equal or larger than the specified value (in 8 byte
2172          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2173          */
2174         if ((adapter->flags & FLAG_HAS_ERT) &&
2175             (adapter->netdev->mtu > ETH_DATA_LEN)) {
2176                 u32 rxdctl = er32(RXDCTL(0));
2177                 ew32(RXDCTL(0), rxdctl | 0x3);
2178                 ew32(ERT, E1000_ERT_2048 | (1 << 13));
2179                 /*
2180                  * With jumbo frames and early-receive enabled, excessive
2181                  * C4->C2 latencies result in dropped transactions.
2182                  */
2183                 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2184                                           e1000e_driver_name, 55);
2185         } else {
2186                 pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2187                                           e1000e_driver_name,
2188                                           PM_QOS_DEFAULT_VALUE);
2189         }
2190
2191         /* Enable Receives */
2192         ew32(RCTL, rctl);
2193 }
2194
2195 /**
2196  *  e1000_update_mc_addr_list - Update Multicast addresses
2197  *  @hw: pointer to the HW structure
2198  *  @mc_addr_list: array of multicast addresses to program
2199  *  @mc_addr_count: number of multicast addresses to program
2200  *  @rar_used_count: the first RAR register free to program
2201  *  @rar_count: total number of supported Receive Address Registers
2202  *
2203  *  Updates the Receive Address Registers and Multicast Table Array.
2204  *  The caller must have a packed mc_addr_list of multicast addresses.
2205  *  The parameter rar_count will usually be hw->mac.rar_entry_count
2206  *  unless there are workarounds that change this.  Currently no func pointer
2207  *  exists and all implementations are handled in the generic version of this
2208  *  function.
2209  **/
2210 static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2211                                       u32 mc_addr_count, u32 rar_used_count,
2212                                       u32 rar_count)
2213 {
2214         hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count,
2215                                         rar_used_count, rar_count);
2216 }
2217
2218 /**
2219  * e1000_set_multi - Multicast and Promiscuous mode set
2220  * @netdev: network interface device structure
2221  *
2222  * The set_multi entry point is called whenever the multicast address
2223  * list or the network interface flags are updated.  This routine is
2224  * responsible for configuring the hardware for proper multicast,
2225  * promiscuous mode, and all-multi behavior.
2226  **/
2227 static void e1000_set_multi(struct net_device *netdev)
2228 {
2229         struct e1000_adapter *adapter = netdev_priv(netdev);
2230         struct e1000_hw *hw = &adapter->hw;
2231         struct e1000_mac_info *mac = &hw->mac;
2232         struct dev_mc_list *mc_ptr;
2233         u8  *mta_list;
2234         u32 rctl;
2235         int i;
2236
2237         /* Check for Promiscuous and All Multicast modes */
2238
2239         rctl = er32(RCTL);
2240
2241         if (netdev->flags & IFF_PROMISC) {
2242                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2243                 rctl &= ~E1000_RCTL_VFE;
2244         } else {
2245                 if (netdev->flags & IFF_ALLMULTI) {
2246                         rctl |= E1000_RCTL_MPE;
2247                         rctl &= ~E1000_RCTL_UPE;
2248                 } else {
2249                         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2250                 }
2251                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
2252                         rctl |= E1000_RCTL_VFE;
2253         }
2254
2255         ew32(RCTL, rctl);
2256
2257         if (netdev->mc_count) {
2258                 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
2259                 if (!mta_list)
2260                         return;
2261
2262                 /* prepare a packed array of only addresses. */
2263                 mc_ptr = netdev->mc_list;
2264
2265                 for (i = 0; i < netdev->mc_count; i++) {
2266                         if (!mc_ptr)
2267                                 break;
2268                         memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
2269                                ETH_ALEN);
2270                         mc_ptr = mc_ptr->next;
2271                 }
2272
2273                 e1000_update_mc_addr_list(hw, mta_list, i, 1,
2274                                           mac->rar_entry_count);
2275                 kfree(mta_list);
2276         } else {
2277                 /*
2278                  * if we're called from probe, we might not have
2279                  * anything to do here, so clear out the list
2280                  */
2281                 e1000_update_mc_addr_list(hw, NULL, 0, 1, mac->rar_entry_count);
2282         }
2283 }
2284
2285 /**
2286  * e1000_configure - configure the hardware for Rx and Tx
2287  * @adapter: private board structure
2288  **/
2289 static void e1000_configure(struct e1000_adapter *adapter)
2290 {
2291         e1000_set_multi(adapter->netdev);
2292
2293         e1000_restore_vlan(adapter);
2294         e1000_init_manageability(adapter);
2295
2296         e1000_configure_tx(adapter);
2297         e1000_setup_rctl(adapter);
2298         e1000_configure_rx(adapter);
2299         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
2300 }
2301
2302 /**
2303  * e1000e_power_up_phy - restore link in case the phy was powered down
2304  * @adapter: address of board private structure
2305  *
2306  * The phy may be powered down to save power and turn off link when the
2307  * driver is unloaded and wake on lan is not enabled (among others)
2308  * *** this routine MUST be followed by a call to e1000e_reset ***
2309  **/
2310 void e1000e_power_up_phy(struct e1000_adapter *adapter)
2311 {
2312         u16 mii_reg = 0;
2313
2314         /* Just clear the power down bit to wake the phy back up */
2315         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
2316                 /*
2317                  * According to the manual, the phy will retain its
2318                  * settings across a power-down/up cycle
2319                  */
2320                 e1e_rphy(&adapter->hw, PHY_CONTROL, &mii_reg);
2321                 mii_reg &= ~MII_CR_POWER_DOWN;
2322                 e1e_wphy(&adapter->hw, PHY_CONTROL, mii_reg);
2323         }
2324
2325         adapter->hw.mac.ops.setup_link(&adapter->hw);
2326 }
2327
2328 /**
2329  * e1000_power_down_phy - Power down the PHY
2330  *
2331  * Power down the PHY so no link is implied when interface is down
2332  * The PHY cannot be powered down is management or WoL is active
2333  */
2334 static void e1000_power_down_phy(struct e1000_adapter *adapter)
2335 {
2336         struct e1000_hw *hw = &adapter->hw;
2337         u16 mii_reg;
2338
2339         /* WoL is enabled */
2340         if (adapter->wol)
2341                 return;
2342
2343         /* non-copper PHY? */
2344         if (adapter->hw.phy.media_type != e1000_media_type_copper)
2345                 return;
2346
2347         /* reset is blocked because of a SoL/IDER session */
2348         if (e1000e_check_mng_mode(hw) || e1000_check_reset_block(hw))
2349                 return;
2350
2351         /* manageability (AMT) is enabled */
2352         if (er32(MANC) & E1000_MANC_SMBUS_EN)
2353                 return;
2354
2355         /* power down the PHY */
2356         e1e_rphy(hw, PHY_CONTROL, &mii_reg);
2357         mii_reg |= MII_CR_POWER_DOWN;
2358         e1e_wphy(hw, PHY_CONTROL, mii_reg);
2359         mdelay(1);
2360 }
2361
2362 /**
2363  * e1000e_reset - bring the hardware into a known good state
2364  *
2365  * This function boots the hardware and enables some settings that
2366  * require a configuration cycle of the hardware - those cannot be
2367  * set/changed during runtime. After reset the device needs to be
2368  * properly configured for Rx, Tx etc.
2369  */
2370 void e1000e_reset(struct e1000_adapter *adapter)
2371 {
2372         struct e1000_mac_info *mac = &adapter->hw.mac;
2373         struct e1000_fc_info *fc = &adapter->hw.fc;
2374         struct e1000_hw *hw = &adapter->hw;
2375         u32 tx_space, min_tx_space, min_rx_space;
2376         u32 pba = adapter->pba;
2377         u16 hwm;
2378
2379         /* reset Packet Buffer Allocation to default */
2380         ew32(PBA, pba);
2381
2382         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
2383                 /*
2384                  * To maintain wire speed transmits, the Tx FIFO should be
2385                  * large enough to accommodate two full transmit packets,
2386                  * rounded up to the next 1KB and expressed in KB.  Likewise,
2387                  * the Rx FIFO should be large enough to accommodate at least
2388                  * one full receive packet and is similarly rounded up and
2389                  * expressed in KB.
2390                  */
2391                 pba = er32(PBA);
2392                 /* upper 16 bits has Tx packet buffer allocation size in KB */
2393                 tx_space = pba >> 16;
2394                 /* lower 16 bits has Rx packet buffer allocation size in KB */
2395                 pba &= 0xffff;
2396                 /*
2397                  * the Tx fifo also stores 16 bytes of information about the tx
2398                  * but don't include ethernet FCS because hardware appends it
2399                  */
2400                 min_tx_space = (adapter->max_frame_size +
2401                                 sizeof(struct e1000_tx_desc) -
2402                                 ETH_FCS_LEN) * 2;
2403                 min_tx_space = ALIGN(min_tx_space, 1024);
2404                 min_tx_space >>= 10;
2405                 /* software strips receive CRC, so leave room for it */
2406                 min_rx_space = adapter->max_frame_size;
2407                 min_rx_space = ALIGN(min_rx_space, 1024);
2408                 min_rx_space >>= 10;
2409
2410                 /*
2411                  * If current Tx allocation is less than the min Tx FIFO size,
2412                  * and the min Tx FIFO size is less than the current Rx FIFO
2413                  * allocation, take space away from current Rx allocation
2414                  */
2415                 if ((tx_space < min_tx_space) &&
2416                     ((min_tx_space - tx_space) < pba)) {
2417                         pba -= min_tx_space - tx_space;
2418
2419                         /*
2420                          * if short on Rx space, Rx wins and must trump tx
2421                          * adjustment or use Early Receive if available
2422                          */
2423                         if ((pba < min_rx_space) &&
2424                             (!(adapter->flags & FLAG_HAS_ERT)))
2425                                 /* ERT enabled in e1000_configure_rx */
2426                                 pba = min_rx_space;
2427                 }
2428
2429                 ew32(PBA, pba);
2430         }
2431
2432
2433         /*
2434          * flow control settings
2435          *
2436          * The high water mark must be low enough to fit one full frame
2437          * (or the size used for early receive) above it in the Rx FIFO.
2438          * Set it to the lower of:
2439          * - 90% of the Rx FIFO size, and
2440          * - the full Rx FIFO size minus the early receive size (for parts
2441          *   with ERT support assuming ERT set to E1000_ERT_2048), or
2442          * - the full Rx FIFO size minus one full frame
2443          */
2444         if (adapter->flags & FLAG_HAS_ERT)
2445                 hwm = min(((pba << 10) * 9 / 10),
2446                           ((pba << 10) - (E1000_ERT_2048 << 3)));
2447         else
2448                 hwm = min(((pba << 10) * 9 / 10),
2449                           ((pba << 10) - adapter->max_frame_size));
2450
2451         fc->high_water = hwm & 0xFFF8; /* 8-byte granularity */
2452         fc->low_water = fc->high_water - 8;
2453
2454         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
2455                 fc->pause_time = 0xFFFF;
2456         else
2457                 fc->pause_time = E1000_FC_PAUSE_TIME;
2458         fc->send_xon = 1;
2459         fc->type = fc->original_type;
2460
2461         /* Allow time for pending master requests to run */
2462         mac->ops.reset_hw(hw);
2463
2464         /*
2465          * For parts with AMT enabled, let the firmware know
2466          * that the network interface is in control
2467          */
2468         if (adapter->flags & FLAG_HAS_AMT)
2469                 e1000_get_hw_control(adapter);
2470
2471         ew32(WUC, 0);
2472
2473         if (mac->ops.init_hw(hw))
2474                 e_err("Hardware Error\n");
2475
2476         e1000_update_mng_vlan(adapter);
2477
2478         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2479         ew32(VET, ETH_P_8021Q);
2480
2481         e1000e_reset_adaptive(hw);
2482         e1000_get_phy_info(hw);
2483
2484         if (!(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2485                 u16 phy_data = 0;
2486                 /*
2487                  * speed up time to link by disabling smart power down, ignore
2488                  * the return value of this function because there is nothing
2489                  * different we would do if it failed
2490                  */
2491                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2492                 phy_data &= ~IGP02E1000_PM_SPD;
2493                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2494         }
2495 }
2496
2497 int e1000e_up(struct e1000_adapter *adapter)
2498 {
2499         struct e1000_hw *hw = &adapter->hw;
2500
2501         /* hardware has been reset, we need to reload some things */
2502         e1000_configure(adapter);
2503
2504         clear_bit(__E1000_DOWN, &adapter->state);
2505
2506         napi_enable(&adapter->napi);
2507         e1000_irq_enable(adapter);
2508
2509         /* fire a link change interrupt to start the watchdog */
2510         ew32(ICS, E1000_ICS_LSC);
2511         return 0;
2512 }
2513
2514 void e1000e_down(struct e1000_adapter *adapter)
2515 {
2516         struct net_device *netdev = adapter->netdev;
2517         struct e1000_hw *hw = &adapter->hw;
2518         u32 tctl, rctl;
2519
2520         /*
2521          * signal that we're down so the interrupt handler does not
2522          * reschedule our watchdog timer
2523          */
2524         set_bit(__E1000_DOWN, &adapter->state);
2525
2526         /* disable receives in the hardware */
2527         rctl = er32(RCTL);
2528         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2529         /* flush and sleep below */
2530
2531         netif_tx_stop_all_queues(netdev);
2532
2533         /* disable transmits in the hardware */
2534         tctl = er32(TCTL);
2535         tctl &= ~E1000_TCTL_EN;
2536         ew32(TCTL, tctl);
2537         /* flush both disables and wait for them to finish */
2538         e1e_flush();
2539         msleep(10);
2540
2541         napi_disable(&adapter->napi);
2542         e1000_irq_disable(adapter);
2543
2544         del_timer_sync(&adapter->watchdog_timer);
2545         del_timer_sync(&adapter->phy_info_timer);
2546
2547         netdev->tx_queue_len = adapter->tx_queue_len;
2548         netif_carrier_off(netdev);
2549         adapter->link_speed = 0;
2550         adapter->link_duplex = 0;
2551
2552         if (!pci_channel_offline(adapter->pdev))
2553                 e1000e_reset(adapter);
2554         e1000_clean_tx_ring(adapter);
2555         e1000_clean_rx_ring(adapter);
2556
2557         /*
2558          * TODO: for power management, we could drop the link and
2559          * pci_disable_device here.
2560          */
2561 }
2562
2563 void e1000e_reinit_locked(struct e1000_adapter *adapter)
2564 {
2565         might_sleep();
2566         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2567                 msleep(1);
2568         e1000e_down(adapter);
2569         e1000e_up(adapter);
2570         clear_bit(__E1000_RESETTING, &adapter->state);
2571 }
2572
2573 /**
2574  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2575  * @adapter: board private structure to initialize
2576  *
2577  * e1000_sw_init initializes the Adapter private data structure.
2578  * Fields are initialized based on PCI device information and
2579  * OS network device settings (MTU size).
2580  **/
2581 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2582 {
2583         struct net_device *netdev = adapter->netdev;
2584
2585         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2586         adapter->rx_ps_bsize0 = 128;
2587         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2588         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2589
2590         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2591         if (!adapter->tx_ring)
2592                 goto err;
2593
2594         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2595         if (!adapter->rx_ring)
2596                 goto err;
2597
2598         spin_lock_init(&adapter->tx_queue_lock);
2599
2600         /* Explicitly disable IRQ since the NIC can be in any state. */
2601         e1000_irq_disable(adapter);
2602
2603         spin_lock_init(&adapter->stats_lock);
2604
2605         set_bit(__E1000_DOWN, &adapter->state);
2606         return 0;
2607
2608 err:
2609         e_err("Unable to allocate memory for queues\n");
2610         kfree(adapter->rx_ring);
2611         kfree(adapter->tx_ring);
2612         return -ENOMEM;
2613 }
2614
2615 /**
2616  * e1000_intr_msi_test - Interrupt Handler
2617  * @irq: interrupt number
2618  * @data: pointer to a network interface device structure
2619  **/
2620 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2621 {
2622         struct net_device *netdev = data;
2623         struct e1000_adapter *adapter = netdev_priv(netdev);
2624         struct e1000_hw *hw = &adapter->hw;
2625         u32 icr = er32(ICR);
2626
2627         e_dbg("%s: icr is %08X\n", netdev->name, icr);
2628         if (icr & E1000_ICR_RXSEQ) {
2629                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2630                 wmb();
2631         }
2632
2633         return IRQ_HANDLED;
2634 }
2635
2636 /**
2637  * e1000_test_msi_interrupt - Returns 0 for successful test
2638  * @adapter: board private struct
2639  *
2640  * code flow taken from tg3.c
2641  **/
2642 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2643 {
2644         struct net_device *netdev = adapter->netdev;
2645         struct e1000_hw *hw = &adapter->hw;
2646         int err;
2647
2648         /* poll_enable hasn't been called yet, so don't need disable */
2649         /* clear any pending events */
2650         er32(ICR);
2651
2652         /* free the real vector and request a test handler */
2653         e1000_free_irq(adapter);
2654
2655         /* Assume that the test fails, if it succeeds then the test
2656          * MSI irq handler will unset this flag */
2657         adapter->flags |= FLAG_MSI_TEST_FAILED;
2658
2659         err = pci_enable_msi(adapter->pdev);
2660         if (err)
2661                 goto msi_test_failed;
2662
2663         err = request_irq(adapter->pdev->irq, &e1000_intr_msi_test, 0,
2664                           netdev->name, netdev);
2665         if (err) {
2666                 pci_disable_msi(adapter->pdev);
2667                 goto msi_test_failed;
2668         }
2669
2670         wmb();
2671
2672         e1000_irq_enable(adapter);
2673
2674         /* fire an unusual interrupt on the test handler */
2675         ew32(ICS, E1000_ICS_RXSEQ);
2676         e1e_flush();
2677         msleep(50);
2678
2679         e1000_irq_disable(adapter);
2680
2681         rmb();
2682
2683         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
2684                 err = -EIO;
2685                 e_info("MSI interrupt test failed!\n");
2686         }
2687
2688         free_irq(adapter->pdev->irq, netdev);
2689         pci_disable_msi(adapter->pdev);
2690
2691         if (err == -EIO)
2692                 goto msi_test_failed;
2693
2694         /* okay so the test worked, restore settings */
2695         e_dbg("%s: MSI interrupt test succeeded!\n", netdev->name);
2696 msi_test_failed:
2697         /* restore the original vector, even if it failed */
2698         e1000_request_irq(adapter);
2699         return err;
2700 }
2701
2702 /**
2703  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
2704  * @adapter: board private struct
2705  *
2706  * code flow taken from tg3.c, called with e1000 interrupts disabled.
2707  **/
2708 static int e1000_test_msi(struct e1000_adapter *adapter)
2709 {
2710         int err;
2711         u16 pci_cmd;
2712
2713         if (!(adapter->flags & FLAG_MSI_ENABLED))
2714                 return 0;
2715
2716         /* disable SERR in case the MSI write causes a master abort */
2717         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
2718         pci_write_config_word(adapter->pdev, PCI_COMMAND,
2719                               pci_cmd & ~PCI_COMMAND_SERR);
2720
2721         err = e1000_test_msi_interrupt(adapter);
2722
2723         /* restore previous setting of command word */
2724         pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
2725
2726         /* success ! */
2727         if (!err)
2728                 return 0;
2729
2730         /* EIO means MSI test failed */
2731         if (err != -EIO)
2732                 return err;
2733
2734         /* back to INTx mode */
2735         e_warn("MSI interrupt test failed, using legacy interrupt.\n");
2736
2737         e1000_free_irq(adapter);
2738
2739         err = e1000_request_irq(adapter);
2740
2741         return err;
2742 }
2743
2744 /**
2745  * e1000_open - Called when a network interface is made active
2746  * @netdev: network interface device structure
2747  *
2748  * Returns 0 on success, negative value on failure
2749  *
2750  * The open entry point is called when a network interface is made
2751  * active by the system (IFF_UP).  At this point all resources needed
2752  * for transmit and receive operations are allocated, the interrupt
2753  * handler is registered with the OS, the watchdog timer is started,
2754  * and the stack is notified that the interface is ready.
2755  **/
2756 static int e1000_open(struct net_device *netdev)
2757 {
2758         struct e1000_adapter *adapter = netdev_priv(netdev);
2759         struct e1000_hw *hw = &adapter->hw;
2760         int err;
2761
2762         /* disallow open during test */
2763         if (test_bit(__E1000_TESTING, &adapter->state))
2764                 return -EBUSY;
2765
2766         /* allocate transmit descriptors */
2767         err = e1000e_setup_tx_resources(adapter);
2768         if (err)
2769                 goto err_setup_tx;
2770
2771         /* allocate receive descriptors */
2772         err = e1000e_setup_rx_resources(adapter);
2773         if (err)
2774                 goto err_setup_rx;
2775
2776         e1000e_power_up_phy(adapter);
2777
2778         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2779         if ((adapter->hw.mng_cookie.status &
2780              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
2781                 e1000_update_mng_vlan(adapter);
2782
2783         /*
2784          * If AMT is enabled, let the firmware know that the network
2785          * interface is now open
2786          */
2787         if (adapter->flags & FLAG_HAS_AMT)
2788                 e1000_get_hw_control(adapter);
2789
2790         /*
2791          * before we allocate an interrupt, we must be ready to handle it.
2792          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
2793          * as soon as we call pci_request_irq, so we have to setup our
2794          * clean_rx handler before we do so.
2795          */
2796         e1000_configure(adapter);
2797
2798         err = e1000_request_irq(adapter);
2799         if (err)
2800                 goto err_req_irq;
2801
2802         /*
2803          * Work around PCIe errata with MSI interrupts causing some chipsets to
2804          * ignore e1000e MSI messages, which means we need to test our MSI
2805          * interrupt now
2806          */
2807         {
2808                 err = e1000_test_msi(adapter);
2809                 if (err) {
2810                         e_err("Interrupt allocation failed\n");
2811                         goto err_req_irq;
2812                 }
2813         }
2814
2815         /* From here on the code is the same as e1000e_up() */
2816         clear_bit(__E1000_DOWN, &adapter->state);
2817
2818         napi_enable(&adapter->napi);
2819
2820         e1000_irq_enable(adapter);
2821
2822         netif_tx_start_all_queues(netdev);
2823
2824         /* fire a link status change interrupt to start the watchdog */
2825         ew32(ICS, E1000_ICS_LSC);
2826
2827         return 0;
2828
2829 err_req_irq:
2830         e1000_release_hw_control(adapter);
2831         e1000_power_down_phy(adapter);
2832         e1000e_free_rx_resources(adapter);
2833 err_setup_rx:
2834         e1000e_free_tx_resources(adapter);
2835 err_setup_tx:
2836         e1000e_reset(adapter);
2837
2838         return err;
2839 }
2840
2841 /**
2842  * e1000_close - Disables a network interface
2843  * @netdev: network interface device structure
2844  *
2845  * Returns 0, this is not allowed to fail
2846  *
2847  * The close entry point is called when an interface is de-activated
2848  * by the OS.  The hardware is still under the drivers control, but
2849  * needs to be disabled.  A global MAC reset is issued to stop the
2850  * hardware, and all transmit and receive resources are freed.
2851  **/
2852 static int e1000_close(struct net_device *netdev)
2853 {
2854         struct e1000_adapter *adapter = netdev_priv(netdev);
2855
2856         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
2857         e1000e_down(adapter);
2858         e1000_power_down_phy(adapter);
2859         e1000_free_irq(adapter);
2860
2861         e1000e_free_tx_resources(adapter);
2862         e1000e_free_rx_resources(adapter);
2863
2864         /*
2865          * kill manageability vlan ID if supported, but not if a vlan with
2866          * the same ID is registered on the host OS (let 8021q kill it)
2867          */
2868         if ((adapter->hw.mng_cookie.status &
2869                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2870              !(adapter->vlgrp &&
2871                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
2872                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2873
2874         /*
2875          * If AMT is enabled, let the firmware know that the network
2876          * interface is now closed
2877          */
2878         if (adapter->flags & FLAG_HAS_AMT)
2879                 e1000_release_hw_control(adapter);
2880
2881         return 0;
2882 }
2883 /**
2884  * e1000_set_mac - Change the Ethernet Address of the NIC
2885  * @netdev: network interface device structure
2886  * @p: pointer to an address structure
2887  *
2888  * Returns 0 on success, negative on failure
2889  **/
2890 static int e1000_set_mac(struct net_device *netdev, void *p)
2891 {
2892         struct e1000_adapter *adapter = netdev_priv(netdev);
2893         struct sockaddr *addr = p;
2894
2895         if (!is_valid_ether_addr(addr->sa_data))
2896                 return -EADDRNOTAVAIL;
2897
2898         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2899         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2900
2901         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2902
2903         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
2904                 /* activate the work around */
2905                 e1000e_set_laa_state_82571(&adapter->hw, 1);
2906
2907                 /*
2908                  * Hold a copy of the LAA in RAR[14] This is done so that
2909                  * between the time RAR[0] gets clobbered  and the time it
2910                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2911                  * of the RARs and no incoming packets directed to this port
2912                  * are dropped. Eventually the LAA will be in RAR[0] and
2913                  * RAR[14]
2914                  */
2915                 e1000e_rar_set(&adapter->hw,
2916                               adapter->hw.mac.addr,
2917                               adapter->hw.mac.rar_entry_count - 1);
2918         }
2919
2920         return 0;
2921 }
2922
2923 /**
2924  * e1000e_update_phy_task - work thread to update phy
2925  * @work: pointer to our work struct
2926  *
2927  * this worker thread exists because we must acquire a
2928  * semaphore to read the phy, which we could msleep while
2929  * waiting for it, and we can't msleep in a timer.
2930  **/
2931 static void e1000e_update_phy_task(struct work_struct *work)
2932 {
2933         struct e1000_adapter *adapter = container_of(work,
2934                                         struct e1000_adapter, update_phy_task);
2935         e1000_get_phy_info(&adapter->hw);
2936 }
2937
2938 /*
2939  * Need to wait a few seconds after link up to get diagnostic information from
2940  * the phy
2941  */
2942 static void e1000_update_phy_info(unsigned long data)
2943 {
2944         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2945         schedule_work(&adapter->update_phy_task);
2946 }
2947
2948 /**
2949  * e1000e_update_stats - Update the board statistics counters
2950  * @adapter: board private structure
2951  **/
2952 void e1000e_update_stats(struct e1000_adapter *adapter)
2953 {
2954         struct e1000_hw *hw = &adapter->hw;
2955         struct pci_dev *pdev = adapter->pdev;
2956         unsigned long irq_flags;
2957         u16 phy_tmp;
2958
2959 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2960
2961         /*
2962          * Prevent stats update while adapter is being reset, or if the pci
2963          * connection is down.
2964          */
2965         if (adapter->link_speed == 0)
2966                 return;
2967         if (pci_channel_offline(pdev))
2968                 return;
2969
2970         spin_lock_irqsave(&adapter->stats_lock, irq_flags);
2971
2972         /*
2973          * these counters are modified from e1000_adjust_tbi_stats,
2974          * called from the interrupt context, so they must only
2975          * be written while holding adapter->stats_lock
2976          */
2977
2978         adapter->stats.crcerrs += er32(CRCERRS);
2979         adapter->stats.gprc += er32(GPRC);
2980         adapter->stats.gorc += er32(GORCL);
2981         er32(GORCH); /* Clear gorc */
2982         adapter->stats.bprc += er32(BPRC);
2983         adapter->stats.mprc += er32(MPRC);
2984         adapter->stats.roc += er32(ROC);
2985
2986         adapter->stats.mpc += er32(MPC);
2987         adapter->stats.scc += er32(SCC);
2988         adapter->stats.ecol += er32(ECOL);
2989         adapter->stats.mcc += er32(MCC);
2990         adapter->stats.latecol += er32(LATECOL);
2991         adapter->stats.dc += er32(DC);
2992         adapter->stats.xonrxc += er32(XONRXC);
2993         adapter->stats.xontxc += er32(XONTXC);
2994         adapter->stats.xoffrxc += er32(XOFFRXC);
2995         adapter->stats.xofftxc += er32(XOFFTXC);
2996         adapter->stats.gptc += er32(GPTC);
2997         adapter->stats.gotc += er32(GOTCL);
2998         er32(GOTCH); /* Clear gotc */
2999         adapter->stats.rnbc += er32(RNBC);
3000         adapter->stats.ruc += er32(RUC);
3001
3002         adapter->stats.mptc += er32(MPTC);
3003         adapter->stats.bptc += er32(BPTC);
3004
3005         /* used for adaptive IFS */
3006
3007         hw->mac.tx_packet_delta = er32(TPT);
3008         adapter->stats.tpt += hw->mac.tx_packet_delta;
3009         hw->mac.collision_delta = er32(COLC);
3010         adapter->stats.colc += hw->mac.collision_delta;
3011
3012         adapter->stats.algnerrc += er32(ALGNERRC);
3013         adapter->stats.rxerrc += er32(RXERRC);
3014         adapter->stats.tncrs += er32(TNCRS);
3015         adapter->stats.cexterr += er32(CEXTERR);
3016         adapter->stats.tsctc += er32(TSCTC);
3017         adapter->stats.tsctfc += er32(TSCTFC);
3018
3019         /* Fill out the OS statistics structure */
3020         adapter->net_stats.multicast = adapter->stats.mprc;
3021         adapter->net_stats.collisions = adapter->stats.colc;
3022
3023         /* Rx Errors */
3024
3025         /*
3026          * RLEC on some newer hardware can be incorrect so build
3027          * our own version based on RUC and ROC
3028          */
3029         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
3030                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3031                 adapter->stats.ruc + adapter->stats.roc +
3032                 adapter->stats.cexterr;
3033         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
3034                                               adapter->stats.roc;
3035         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
3036         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
3037         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
3038
3039         /* Tx Errors */
3040         adapter->net_stats.tx_errors = adapter->stats.ecol +
3041                                        adapter->stats.latecol;
3042         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
3043         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
3044         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
3045
3046         /* Tx Dropped needs to be maintained elsewhere */
3047
3048         /* Phy Stats */
3049         if (hw->phy.media_type == e1000_media_type_copper) {
3050                 if ((adapter->link_speed == SPEED_1000) &&
3051                    (!e1e_rphy(hw, PHY_1000T_STATUS, &phy_tmp))) {
3052                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
3053                         adapter->phy_stats.idle_errors += phy_tmp;
3054                 }
3055         }
3056
3057         /* Management Stats */
3058         adapter->stats.mgptc += er32(MGTPTC);
3059         adapter->stats.mgprc += er32(MGTPRC);
3060         adapter->stats.mgpdc += er32(MGTPDC);
3061
3062         spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
3063 }
3064
3065 /**
3066  * e1000_phy_read_status - Update the PHY register status snapshot
3067  * @adapter: board private structure
3068  **/
3069 static void e1000_phy_read_status(struct e1000_adapter *adapter)
3070 {
3071         struct e1000_hw *hw = &adapter->hw;
3072         struct e1000_phy_regs *phy = &adapter->phy_regs;
3073         int ret_val;
3074         unsigned long irq_flags;
3075
3076
3077         spin_lock_irqsave(&adapter->stats_lock, irq_flags);
3078
3079         if ((er32(STATUS) & E1000_STATUS_LU) &&
3080             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3081                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3082                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3083                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3084                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3085                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3086                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3087                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3088                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3089                 if (ret_val)
3090                         e_warn("Error reading PHY register\n");
3091         } else {
3092                 /*
3093                  * Do not read PHY registers if link is not up
3094                  * Set values to typical power-on defaults
3095                  */
3096                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3097                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3098                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3099                              BMSR_ERCAP);
3100                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3101                                   ADVERTISE_ALL | ADVERTISE_CSMA);
3102                 phy->lpa = 0;
3103                 phy->expansion = EXPANSION_ENABLENPAGE;
3104                 phy->ctrl1000 = ADVERTISE_1000FULL;
3105                 phy->stat1000 = 0;
3106                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3107         }
3108
3109         spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
3110 }
3111
3112 static void e1000_print_link_info(struct e1000_adapter *adapter)
3113 {
3114         struct e1000_hw *hw = &adapter->hw;
3115         u32 ctrl = er32(CTRL);
3116
3117         e_info("Link is Up %d Mbps %s, Flow Control: %s\n",
3118                adapter->link_speed,
3119                (adapter->link_duplex == FULL_DUPLEX) ?
3120                                 "Full Duplex" : "Half Duplex",
3121                ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3122                                 "RX/TX" :
3123                ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3124                ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
3125 }
3126
3127 static bool e1000_has_link(struct e1000_adapter *adapter)
3128 {
3129         struct e1000_hw *hw = &adapter->hw;
3130         bool link_active = 0;
3131         s32 ret_val = 0;
3132
3133         /*
3134          * get_link_status is set on LSC (link status) interrupt or
3135          * Rx sequence error interrupt.  get_link_status will stay
3136          * false until the check_for_link establishes link
3137          * for copper adapters ONLY
3138          */
3139         switch (hw->phy.media_type) {
3140         case e1000_media_type_copper:
3141                 if (hw->mac.get_link_status) {
3142                         ret_val = hw->mac.ops.check_for_link(hw);
3143                         link_active = !hw->mac.get_link_status;
3144                 } else {
3145                         link_active = 1;
3146                 }
3147                 break;
3148         case e1000_media_type_fiber:
3149                 ret_val = hw->mac.ops.check_for_link(hw);
3150                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3151                 break;
3152         case e1000_media_type_internal_serdes:
3153                 ret_val = hw->mac.ops.check_for_link(hw);
3154                 link_active = adapter->hw.mac.serdes_has_link;
3155                 break;
3156         default:
3157         case e1000_media_type_unknown:
3158                 break;
3159         }
3160
3161         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3162             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3163                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3164                 e_info("Gigabit has been disabled, downgrading speed\n");
3165         }
3166
3167         return link_active;
3168 }
3169
3170 static void e1000e_enable_receives(struct e1000_adapter *adapter)
3171 {
3172         /* make sure the receive unit is started */
3173         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3174             (adapter->flags & FLAG_RX_RESTART_NOW)) {
3175                 struct e1000_hw *hw = &adapter->hw;
3176                 u32 rctl = er32(RCTL);
3177                 ew32(RCTL, rctl | E1000_RCTL_EN);
3178                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3179         }
3180 }
3181
3182 /**
3183  * e1000_watchdog - Timer Call-back
3184  * @data: pointer to adapter cast into an unsigned long
3185  **/
3186 static void e1000_watchdog(unsigned long data)
3187 {
3188         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3189
3190         /* Do the rest outside of interrupt context */
3191         schedule_work(&adapter->watchdog_task);
3192
3193         /* TODO: make this use queue_delayed_work() */
3194 }
3195
3196 static void e1000_watchdog_task(struct work_struct *work)
3197 {
3198         struct e1000_adapter *adapter = container_of(work,
3199                                         struct e1000_adapter, watchdog_task);
3200         struct net_device *netdev = adapter->netdev;
3201         struct e1000_mac_info *mac = &adapter->hw.mac;
3202         struct e1000_ring *tx_ring = adapter->tx_ring;
3203         struct e1000_hw *hw = &adapter->hw;
3204         u32 link, tctl;
3205         int tx_pending = 0;
3206
3207         link = e1000_has_link(adapter);
3208         if ((netif_carrier_ok(netdev)) && link) {
3209                 e1000e_enable_receives(adapter);
3210                 goto link_up;
3211         }
3212
3213         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3214             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3215                 e1000_update_mng_vlan(adapter);
3216
3217         if (link) {
3218                 if (!netif_carrier_ok(netdev)) {
3219                         bool txb2b = 1;
3220                         /* update snapshot of PHY registers on LSC */
3221                         e1000_phy_read_status(adapter);
3222                         mac->ops.get_link_up_info(&adapter->hw,
3223                                                    &adapter->link_speed,
3224                                                    &adapter->link_duplex);
3225                         e1000_print_link_info(adapter);
3226                         /*
3227                          * tweak tx_queue_len according to speed/duplex
3228                          * and adjust the timeout factor
3229                          */
3230                         netdev->tx_queue_len = adapter->tx_queue_len;
3231                         adapter->tx_timeout_factor = 1;
3232                         switch (adapter->link_speed) {
3233                         case SPEED_10:
3234                                 txb2b = 0;
3235                                 netdev->tx_queue_len = 10;
3236                                 adapter->tx_timeout_factor = 16;
3237                                 break;
3238                         case SPEED_100:
3239                                 txb2b = 0;
3240                                 netdev->tx_queue_len = 100;
3241                                 /* maybe add some timeout factor ? */
3242                                 break;
3243                         }
3244
3245                         /*
3246                          * workaround: re-program speed mode bit after
3247                          * link-up event
3248                          */
3249                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3250                             !txb2b) {
3251                                 u32 tarc0;
3252                                 tarc0 = er32(TARC(0));
3253                                 tarc0 &= ~SPEED_MODE_BIT;
3254                                 ew32(TARC(0), tarc0);
3255                         }
3256
3257                         /*
3258                          * disable TSO for pcie and 10/100 speeds, to avoid
3259                          * some hardware issues
3260                          */
3261                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
3262                                 switch (adapter->link_speed) {
3263                                 case SPEED_10:
3264                                 case SPEED_100:
3265                                         e_info("10/100 speed: disabling TSO\n");
3266                                         netdev->features &= ~NETIF_F_TSO;
3267                                         netdev->features &= ~NETIF_F_TSO6;
3268                                         break;
3269                                 case SPEED_1000:
3270                                         netdev->features |= NETIF_F_TSO;
3271                                         netdev->features |= NETIF_F_TSO6;
3272                                         break;
3273                                 default:
3274                                         /* oops */
3275                                         break;
3276                                 }
3277                         }
3278
3279                         /*
3280                          * enable transmits in the hardware, need to do this
3281                          * after setting TARC(0)
3282                          */
3283                         tctl = er32(TCTL);
3284                         tctl |= E1000_TCTL_EN;
3285                         ew32(TCTL, tctl);
3286
3287                         netif_carrier_on(netdev);
3288                         netif_tx_wake_all_queues(netdev);
3289
3290                         if (!test_bit(__E1000_DOWN, &adapter->state))
3291                                 mod_timer(&adapter->phy_info_timer,
3292                                           round_jiffies(jiffies + 2 * HZ));
3293                 }
3294         } else {
3295                 if (netif_carrier_ok(netdev)) {
3296                         adapter->link_speed = 0;
3297                         adapter->link_duplex = 0;
3298                         e_info("Link is Down\n");
3299                         netif_carrier_off(netdev);
3300                         netif_tx_stop_all_queues(netdev);
3301                         if (!test_bit(__E1000_DOWN, &adapter->state))
3302                                 mod_timer(&adapter->phy_info_timer,
3303                                           round_jiffies(jiffies + 2 * HZ));
3304
3305                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3306                                 schedule_work(&adapter->reset_task);
3307                 }
3308         }
3309
3310 link_up:
3311         e1000e_update_stats(adapter);
3312
3313         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3314         adapter->tpt_old = adapter->stats.tpt;
3315         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3316         adapter->colc_old = adapter->stats.colc;
3317
3318         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3319         adapter->gorc_old = adapter->stats.gorc;
3320         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3321         adapter->gotc_old = adapter->stats.gotc;
3322
3323         e1000e_update_adaptive(&adapter->hw);
3324
3325         if (!netif_carrier_ok(netdev)) {
3326                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3327                                tx_ring->count);
3328                 if (tx_pending) {
3329                         /*
3330                          * We've lost link, so the controller stops DMA,
3331                          * but we've got queued Tx work that's never going
3332                          * to get done, so reset controller to flush Tx.
3333                          * (Do the reset outside of interrupt context).
3334                          */
3335                         adapter->tx_timeout_count++;
3336                         schedule_work(&adapter->reset_task);
3337                 }
3338         }
3339
3340         /* Cause software interrupt to ensure Rx ring is cleaned */
3341         ew32(ICS, E1000_ICS_RXDMT0);
3342
3343         /* Force detection of hung controller every watchdog period */
3344         adapter->detect_tx_hung = 1;
3345
3346         /*
3347          * With 82571 controllers, LAA may be overwritten due to controller
3348          * reset from the other port. Set the appropriate LAA in RAR[0]
3349          */
3350         if (e1000e_get_laa_state_82571(hw))
3351                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3352
3353         /* Reset the timer */
3354         if (!test_bit(__E1000_DOWN, &adapter->state))
3355                 mod_timer(&adapter->watchdog_timer,
3356                           round_jiffies(jiffies + 2 * HZ));
3357 }
3358
3359 #define E1000_TX_FLAGS_CSUM             0x00000001
3360 #define E1000_TX_FLAGS_VLAN             0x00000002
3361 #define E1000_TX_FLAGS_TSO              0x00000004
3362 #define E1000_TX_FLAGS_IPV4             0x00000008
3363 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
3364 #define E1000_TX_FLAGS_VLAN_SHIFT       16
3365
3366 static int e1000_tso(struct e1000_adapter *adapter,
3367                      struct sk_buff *skb)
3368 {
3369         struct e1000_ring *tx_ring = adapter->tx_ring;
3370         struct e1000_context_desc *context_desc;
3371         struct e1000_buffer *buffer_info;
3372         unsigned int i;
3373         u32 cmd_length = 0;
3374         u16 ipcse = 0, tucse, mss;
3375         u8 ipcss, ipcso, tucss, tucso, hdr_len;
3376         int err;
3377
3378         if (skb_is_gso(skb)) {
3379                 if (skb_header_cloned(skb)) {
3380                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3381                         if (err)
3382                                 return err;
3383                 }
3384
3385                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3386                 mss = skb_shinfo(skb)->gso_size;
3387                 if (skb->protocol == htons(ETH_P_IP)) {
3388                         struct iphdr *iph = ip_hdr(skb);
3389                         iph->tot_len = 0;
3390                         iph->check = 0;
3391                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
3392                                                                  iph->daddr, 0,
3393                                                                  IPPROTO_TCP,
3394                                                                  0);
3395                         cmd_length = E1000_TXD_CMD_IP;
3396                         ipcse = skb_transport_offset(skb) - 1;
3397                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
3398                         ipv6_hdr(skb)->payload_len = 0;
3399                         tcp_hdr(skb)->check =
3400                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3401                                                  &ipv6_hdr(skb)->daddr,
3402                                                  0, IPPROTO_TCP, 0);
3403                         ipcse = 0;
3404                 }
3405                 ipcss = skb_network_offset(skb);
3406                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3407                 tucss = skb_transport_offset(skb);
3408                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3409                 tucse = 0;
3410
3411                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3412                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3413
3414                 i = tx_ring->next_to_use;
3415                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3416                 buffer_info = &tx_ring->buffer_info[i];
3417
3418                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3419                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3420                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3421                 context_desc->upper_setup.tcp_fields.tucss = tucss;
3422                 context_desc->upper_setup.tcp_fields.tucso = tucso;
3423                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3424                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3425                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3426                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3427
3428                 buffer_info->time_stamp = jiffies;
3429                 buffer_info->next_to_watch = i;
3430
3431                 i++;
3432                 if (i == tx_ring->count)
3433                         i = 0;
3434                 tx_ring->next_to_use = i;
3435
3436                 return 1;
3437         }
3438
3439         return 0;
3440 }
3441
3442 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3443 {
3444         struct e1000_ring *tx_ring = adapter->tx_ring;
3445         struct e1000_context_desc *context_desc;
3446         struct e1000_buffer *buffer_info;
3447         unsigned int i;
3448         u8 css;
3449
3450         if (skb->ip_summed == CHECKSUM_PARTIAL) {
3451                 css = skb_transport_offset(skb);
3452
3453                 i = tx_ring->next_to_use;
3454                 buffer_info = &tx_ring->buffer_info[i];
3455                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3456
3457                 context_desc->lower_setup.ip_config = 0;
3458                 context_desc->upper_setup.tcp_fields.tucss = css;
3459                 context_desc->upper_setup.tcp_fields.tucso =
3460                                         css + skb->csum_offset;
3461                 context_desc->upper_setup.tcp_fields.tucse = 0;
3462                 context_desc->tcp_seg_setup.data = 0;
3463                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
3464
3465                 buffer_info->time_stamp = jiffies;
3466                 buffer_info->next_to_watch = i;
3467
3468                 i++;
3469                 if (i == tx_ring->count)
3470                         i = 0;
3471                 tx_ring->next_to_use = i;
3472
3473                 return 1;
3474         }
3475
3476         return 0;
3477 }
3478
3479 #define E1000_MAX_PER_TXD       8192
3480 #define E1000_MAX_TXD_PWR       12
3481
3482 static int e1000_tx_map(struct e1000_adapter *adapter,
3483                         struct sk_buff *skb, unsigned int first,
3484                         unsigned int max_per_txd, unsigned int nr_frags,
3485                         unsigned int mss)
3486 {
3487         struct e1000_ring *tx_ring = adapter->tx_ring;
3488         struct e1000_buffer *buffer_info;
3489         unsigned int len = skb->len - skb->data_len;
3490         unsigned int offset = 0, size, count = 0, i;
3491         unsigned int f;
3492
3493         i = tx_ring->next_to_use;
3494
3495         while (len) {
3496                 buffer_info = &tx_ring->buffer_info[i];
3497                 size = min(len, max_per_txd);
3498
3499                 /* Workaround for premature desc write-backs
3500                  * in TSO mode.  Append 4-byte sentinel desc */
3501                 if (mss && !nr_frags && size == len && size > 8)
3502                         size -= 4;
3503
3504                 buffer_info->length = size;
3505                 /* set time_stamp *before* dma to help avoid a possible race */
3506                 buffer_info->time_stamp = jiffies;
3507                 buffer_info->dma =
3508                         pci_map_single(adapter->pdev,
3509                                 skb->data + offset,
3510                                 size,
3511                                 PCI_DMA_TODEVICE);
3512                 if (pci_dma_mapping_error(adapter->pdev, buffer_info->dma)) {
3513                         dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
3514                         adapter->tx_dma_failed++;
3515                         return -1;
3516                 }
3517                 buffer_info->next_to_watch = i;
3518
3519                 len -= size;
3520                 offset += size;
3521                 count++;
3522                 i++;
3523                 if (i == tx_ring->count)
3524                         i = 0;
3525         }
3526
3527         for (f = 0; f < nr_frags; f++) {
3528                 struct skb_frag_struct *frag;
3529
3530                 frag = &skb_shinfo(skb)->frags[f];
3531                 len = frag->size;
3532                 offset = frag->page_offset;
3533
3534                 while (len) {
3535                         buffer_info = &tx_ring->buffer_info[i];
3536                         size = min(len, max_per_txd);
3537                         /* Workaround for premature desc write-backs
3538                          * in TSO mode.  Append 4-byte sentinel desc */
3539                         if (mss && f == (nr_frags-1) && size == len && size > 8)
3540                                 size -= 4;
3541
3542                         buffer_info->length = size;
3543                         buffer_info->time_stamp = jiffies;
3544                         buffer_info->dma =
3545                                 pci_map_page(adapter->pdev,
3546                                         frag->page,
3547                                         offset,
3548                                         size,
3549                                         PCI_DMA_TODEVICE);
3550                         if (pci_dma_mapping_error(adapter->pdev,
3551                                                   buffer_info->dma)) {
3552                                 dev_err(&adapter->pdev->dev,
3553                                         "TX DMA page map failed\n");
3554                                 adapter->tx_dma_failed++;
3555                                 return -1;
3556                         }
3557
3558                         buffer_info->next_to_watch = i;
3559
3560                         len -= size;
3561                         offset += size;
3562                         count++;
3563
3564                         i++;
3565                         if (i == tx_ring->count)
3566                                 i = 0;
3567                 }
3568         }
3569
3570         if (i == 0)
3571                 i = tx_ring->count - 1;
3572         else
3573                 i--;
3574
3575         tx_ring->buffer_info[i].skb = skb;
3576         tx_ring->buffer_info[first].next_to_watch = i;
3577
3578         return count;
3579 }
3580
3581 static void e1000_tx_queue(struct e1000_adapter *adapter,
3582                            int tx_flags, int count)
3583 {
3584         struct e1000_ring *tx_ring = adapter->tx_ring;
3585         struct e1000_tx_desc *tx_desc = NULL;
3586         struct e1000_buffer *buffer_info;
3587         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3588         unsigned int i;
3589
3590         if (tx_flags & E1000_TX_FLAGS_TSO) {
3591                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3592                              E1000_TXD_CMD_TSE;
3593                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3594
3595                 if (tx_flags & E1000_TX_FLAGS_IPV4)
3596                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3597         }
3598
3599         if (tx_flags & E1000_TX_FLAGS_CSUM) {
3600                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3601                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3602         }
3603
3604         if (tx_flags & E1000_TX_FLAGS_VLAN) {
3605                 txd_lower |= E1000_TXD_CMD_VLE;
3606                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3607         }
3608
3609         i = tx_ring->next_to_use;
3610
3611         while (count--) {
3612                 buffer_info = &tx_ring->buffer_info[i];
3613                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3614                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3615                 tx_desc->lower.data =
3616                         cpu_to_le32(txd_lower | buffer_info->length);
3617                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3618
3619                 i++;
3620                 if (i == tx_ring->count)
3621                         i = 0;
3622         }
3623
3624         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3625
3626         /*
3627          * Force memory writes to complete before letting h/w
3628          * know there are new descriptors to fetch.  (Only
3629          * applicable for weak-ordered memory model archs,
3630          * such as IA-64).
3631          */
3632         wmb();
3633
3634         tx_ring->next_to_use = i;
3635         writel(i, adapter->hw.hw_addr + tx_ring->tail);
3636         /*
3637          * we need this if more than one processor can write to our tail
3638          * at a time, it synchronizes IO on IA64/Altix systems
3639          */
3640         mmiowb();
3641 }
3642
3643 #define MINIMUM_DHCP_PACKET_SIZE 282
3644 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3645                                     struct sk_buff *skb)
3646 {
3647         struct e1000_hw *hw =  &adapter->hw;
3648         u16 length, offset;
3649
3650         if (vlan_tx_tag_present(skb)) {
3651                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id)
3652                     && (adapter->hw.mng_cookie.status &
3653                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
3654                         return 0;
3655         }
3656
3657         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
3658                 return 0;
3659
3660         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
3661                 return 0;
3662
3663         {
3664                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
3665                 struct udphdr *udp;
3666
3667                 if (ip->protocol != IPPROTO_UDP)
3668                         return 0;
3669
3670                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
3671                 if (ntohs(udp->dest) != 67)
3672                         return 0;
3673
3674                 offset = (u8 *)udp + 8 - skb->data;
3675                 length = skb->len - offset;
3676                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
3677         }
3678
3679         return 0;
3680 }
3681
3682 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3683 {
3684         struct e1000_adapter *adapter = netdev_priv(netdev);
3685
3686         netif_stop_queue(netdev);
3687         /*
3688          * Herbert's original patch had:
3689          *  smp_mb__after_netif_stop_queue();
3690          * but since that doesn't exist yet, just open code it.
3691          */
3692         smp_mb();
3693
3694         /*
3695          * We need to check again in a case another CPU has just
3696          * made room available.
3697          */
3698         if (e1000_desc_unused(adapter->tx_ring) < size)
3699                 return -EBUSY;
3700
3701         /* A reprieve! */
3702         netif_start_queue(netdev);
3703         ++adapter->restart_queue;
3704         return 0;
3705 }
3706
3707 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
3708 {
3709         struct e1000_adapter *adapter = netdev_priv(netdev);
3710
3711         if (e1000_desc_unused(adapter->tx_ring) >= size)
3712                 return 0;
3713         return __e1000_maybe_stop_tx(netdev, size);
3714 }
3715
3716 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3717 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3718 {
3719         struct e1000_adapter *adapter = netdev_priv(netdev);
3720         struct e1000_ring *tx_ring = adapter->tx_ring;
3721         unsigned int first;
3722         unsigned int max_per_txd = E1000_MAX_PER_TXD;
3723         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3724         unsigned int tx_flags = 0;
3725         unsigned int len = skb->len - skb->data_len;
3726         unsigned long irq_flags;
3727         unsigned int nr_frags;
3728         unsigned int mss;
3729         int count = 0;
3730         int tso;
3731         unsigned int f;
3732
3733         if (test_bit(__E1000_DOWN, &adapter->state)) {
3734                 dev_kfree_skb_any(skb);
3735                 return NETDEV_TX_OK;
3736         }
3737
3738         if (skb->len <= 0) {
3739                 dev_kfree_skb_any(skb);
3740                 return NETDEV_TX_OK;
3741         }
3742
3743         mss = skb_shinfo(skb)->gso_size;
3744         /*
3745          * The controller does a simple calculation to
3746          * make sure there is enough room in the FIFO before
3747          * initiating the DMA for each buffer.  The calc is:
3748          * 4 = ceil(buffer len/mss).  To make sure we don't
3749          * overrun the FIFO, adjust the max buffer len if mss
3750          * drops.
3751          */
3752         if (mss) {
3753                 u8 hdr_len;
3754                 max_per_txd = min(mss << 2, max_per_txd);
3755                 max_txd_pwr = fls(max_per_txd) - 1;
3756
3757                 /*
3758                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
3759                  * points to just header, pull a few bytes of payload from
3760                  * frags into skb->data
3761                  */
3762                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3763                 /*
3764                  * we do this workaround for ES2LAN, but it is un-necessary,
3765                  * avoiding it could save a lot of cycles
3766                  */
3767                 if (skb->data_len && (hdr_len == len)) {
3768                         unsigned int pull_size;
3769
3770                         pull_size = min((unsigned int)4, skb->data_len);
3771                         if (!__pskb_pull_tail(skb, pull_size)) {
3772                                 e_err("__pskb_pull_tail failed.\n");
3773                                 dev_kfree_skb_any(skb);
3774                                 return NETDEV_TX_OK;
3775                         }
3776                         len = skb->len - skb->data_len;
3777                 }
3778         }
3779
3780         /* reserve a descriptor for the offload context */
3781         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3782                 count++;
3783         count++;
3784
3785         count += TXD_USE_COUNT(len, max_txd_pwr);
3786
3787         nr_frags = skb_shinfo(skb)->nr_frags;
3788         for (f = 0; f < nr_frags; f++)
3789                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3790                                        max_txd_pwr);
3791
3792         if (adapter->hw.mac.tx_pkt_filtering)
3793                 e1000_transfer_dhcp_info(adapter, skb);
3794
3795         if (!spin_trylock_irqsave(&adapter->tx_queue_lock, irq_flags))
3796                 /* Collision - tell upper layer to requeue */
3797                 return NETDEV_TX_LOCKED;
3798
3799         /*
3800          * need: count + 2 desc gap to keep tail from touching
3801          * head, otherwise try next time
3802          */
3803         if (e1000_maybe_stop_tx(netdev, count + 2)) {
3804                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3805                 return NETDEV_TX_BUSY;
3806         }
3807
3808         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3809                 tx_flags |= E1000_TX_FLAGS_VLAN;
3810                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3811         }
3812
3813         first = tx_ring->next_to_use;
3814
3815         tso = e1000_tso(adapter, skb);
3816         if (tso < 0) {
3817                 dev_kfree_skb_any(skb);
3818                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3819                 return NETDEV_TX_OK;
3820         }
3821
3822         if (tso)
3823                 tx_flags |= E1000_TX_FLAGS_TSO;
3824         else if (e1000_tx_csum(adapter, skb))
3825                 tx_flags |= E1000_TX_FLAGS_CSUM;
3826
3827         /*
3828          * Old method was to assume IPv4 packet by default if TSO was enabled.
3829          * 82571 hardware supports TSO capabilities for IPv6 as well...
3830          * no longer assume, we must.
3831          */
3832         if (skb->protocol == htons(ETH_P_IP))
3833                 tx_flags |= E1000_TX_FLAGS_IPV4;
3834
3835         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
3836         if (count < 0) {
3837                 /* handle pci_map_single() error in e1000_tx_map */
3838                 dev_kfree_skb_any(skb);
3839                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3840                 return NETDEV_TX_OK;
3841         }
3842
3843         e1000_tx_queue(adapter, tx_flags, count);
3844
3845         netdev->trans_start = jiffies;
3846
3847         /* Make sure there is space in the ring for the next send. */
3848         e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
3849
3850         spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3851         return NETDEV_TX_OK;
3852 }
3853
3854 /**
3855  * e1000_tx_timeout - Respond to a Tx Hang
3856  * @netdev: network interface device structure
3857  **/
3858 static void e1000_tx_timeout(struct net_device *netdev)
3859 {
3860         struct e1000_adapter *adapter = netdev_priv(netdev);
3861
3862         /* Do the reset outside of interrupt context */
3863         adapter->tx_timeout_count++;
3864         schedule_work(&adapter->reset_task);
3865 }
3866
3867 static void e1000_reset_task(struct work_struct *work)
3868 {
3869         struct e1000_adapter *adapter;
3870         adapter = container_of(work, struct e1000_adapter, reset_task);
3871
3872         e1000e_reinit_locked(adapter);
3873 }
3874
3875 /**
3876  * e1000_get_stats - Get System Network Statistics
3877  * @netdev: network interface device structure
3878  *
3879  * Returns the address of the device statistics structure.
3880  * The statistics are actually updated from the timer callback.
3881  **/
3882 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3883 {
3884         struct e1000_adapter *adapter = netdev_priv(netdev);
3885
3886         /* only return the current stats */
3887         return &adapter->net_stats;
3888 }
3889
3890 /**
3891  * e1000_change_mtu - Change the Maximum Transfer Unit
3892  * @netdev: network interface device structure
3893  * @new_mtu: new value for maximum frame size
3894  *
3895  * Returns 0 on success, negative on failure
3896  **/
3897 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3898 {
3899         struct e1000_adapter *adapter = netdev_priv(netdev);
3900         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3901
3902         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
3903             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3904                 e_err("Invalid MTU setting\n");
3905                 return -EINVAL;
3906         }
3907
3908         /* Jumbo frame size limits */
3909         if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
3910                 if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
3911                         e_err("Jumbo Frames not supported.\n");
3912                         return -EINVAL;
3913                 }
3914                 if (adapter->hw.phy.type == e1000_phy_ife) {
3915                         e_err("Jumbo Frames not supported.\n");
3916                         return -EINVAL;
3917                 }
3918         }
3919
3920 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3921         if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3922                 e_err("MTU > 9216 not supported.\n");
3923                 return -EINVAL;
3924         }
3925
3926         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3927                 msleep(1);
3928         /* e1000e_down has a dependency on max_frame_size */
3929         adapter->max_frame_size = max_frame;
3930         if (netif_running(netdev))
3931                 e1000e_down(adapter);
3932
3933         /*
3934          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3935          * means we reserve 2 more, this pushes us to allocate from the next
3936          * larger slab size.
3937          * i.e. RXBUFFER_2048 --> size-4096 slab
3938          * However with the new *_jumbo_rx* routines, jumbo receives will use
3939          * fragmented skbs
3940          */
3941
3942         if (max_frame <= 256)
3943                 adapter->rx_buffer_len = 256;
3944         else if (max_frame <= 512)
3945                 adapter->rx_buffer_len = 512;
3946         else if (max_frame <= 1024)
3947                 adapter->rx_buffer_len = 1024;
3948         else if (max_frame <= 2048)
3949                 adapter->rx_buffer_len = 2048;
3950         else
3951                 adapter->rx_buffer_len = 4096;
3952
3953         /* adjust allocation if LPE protects us, and we aren't using SBP */
3954         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
3955              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
3956                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
3957                                          + ETH_FCS_LEN;
3958
3959         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
3960         netdev->mtu = new_mtu;
3961
3962         if (netif_running(netdev))
3963                 e1000e_up(adapter);
3964         else
3965                 e1000e_reset(adapter);
3966
3967         clear_bit(__E1000_RESETTING, &adapter->state);
3968
3969         return 0;
3970 }
3971
3972 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
3973                            int cmd)
3974 {
3975         struct e1000_adapter *adapter = netdev_priv(netdev);
3976         struct mii_ioctl_data *data = if_mii(ifr);
3977
3978         if (adapter->hw.phy.media_type != e1000_media_type_copper)
3979                 return -EOPNOTSUPP;
3980
3981         switch (cmd) {
3982         case SIOCGMIIPHY:
3983                 data->phy_id = adapter->hw.phy.addr;
3984                 break;
3985         case SIOCGMIIREG:
3986                 if (!capable(CAP_NET_ADMIN))
3987                         return -EPERM;
3988                 switch (data->reg_num & 0x1F) {
3989                 case MII_BMCR:
3990                         data->val_out = adapter->phy_regs.bmcr;
3991                         break;
3992                 case MII_BMSR:
3993                         data->val_out = adapter->phy_regs.bmsr;
3994                         break;
3995                 case MII_PHYSID1:
3996                         data->val_out = (adapter->hw.phy.id >> 16);
3997                         break;
3998                 case MII_PHYSID2:
3999                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
4000                         break;
4001                 case MII_ADVERTISE:
4002                         data->val_out = adapter->phy_regs.advertise;
4003                         break;
4004                 case MII_LPA:
4005                         data->val_out = adapter->phy_regs.lpa;
4006                         break;
4007                 case MII_EXPANSION:
4008                         data->val_out = adapter->phy_regs.expansion;
4009                         break;
4010                 case MII_CTRL1000:
4011                         data->val_out = adapter->phy_regs.ctrl1000;
4012                         break;
4013                 case MII_STAT1000:
4014                         data->val_out = adapter->phy_regs.stat1000;
4015                         break;
4016                 case MII_ESTATUS:
4017                         data->val_out = adapter->phy_regs.estatus;
4018                         break;
4019                 default:
4020                         return -EIO;
4021                 }
4022                 break;
4023         case SIOCSMIIREG:
4024         default:
4025                 return -EOPNOTSUPP;
4026         }
4027         return 0;
4028 }
4029
4030 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4031 {
4032         switch (cmd) {
4033         case SIOCGMIIPHY:
4034         case SIOCGMIIREG:
4035         case SIOCSMIIREG:
4036                 return e1000_mii_ioctl(netdev, ifr, cmd);
4037         default:
4038                 return -EOPNOTSUPP;
4039         }
4040 }
4041
4042 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
4043 {
4044         struct net_device *netdev = pci_get_drvdata(pdev);
4045         struct e1000_adapter *adapter = netdev_priv(netdev);
4046         struct e1000_hw *hw = &adapter->hw;
4047         u32 ctrl, ctrl_ext, rctl, status;
4048         u32 wufc = adapter->wol;
4049         int retval = 0;
4050
4051         netif_device_detach(netdev);
4052
4053         if (netif_running(netdev)) {
4054                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4055                 e1000e_down(adapter);
4056                 e1000_free_irq(adapter);
4057         }
4058
4059         retval = pci_save_state(pdev);
4060         if (retval)
4061                 return retval;
4062
4063         status = er32(STATUS);
4064         if (status & E1000_STATUS_LU)
4065                 wufc &= ~E1000_WUFC_LNKC;
4066
4067         if (wufc) {
4068                 e1000_setup_rctl(adapter);
4069                 e1000_set_multi(netdev);
4070
4071                 /* turn on all-multi mode if wake on multicast is enabled */
4072                 if (wufc & E1000_WUFC_MC) {
4073                         rctl = er32(RCTL);
4074                         rctl |= E1000_RCTL_MPE;
4075                         ew32(RCTL, rctl);
4076                 }
4077
4078                 ctrl = er32(CTRL);
4079                 /* advertise wake from D3Cold */
4080                 #define E1000_CTRL_ADVD3WUC 0x00100000
4081                 /* phy power management enable */
4082                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4083                 ctrl |= E1000_CTRL_ADVD3WUC |
4084                         E1000_CTRL_EN_PHY_PWR_MGMT;
4085                 ew32(CTRL, ctrl);
4086
4087                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4088                     adapter->hw.phy.media_type ==
4089                     e1000_media_type_internal_serdes) {
4090                         /* keep the laser running in D3 */
4091                         ctrl_ext = er32(CTRL_EXT);
4092                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
4093                         ew32(CTRL_EXT, ctrl_ext);
4094                 }
4095
4096                 if (adapter->flags & FLAG_IS_ICH)
4097                         e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4098
4099                 /* Allow time for pending master requests to run */
4100                 e1000e_disable_pcie_master(&adapter->hw);
4101
4102                 ew32(WUC, E1000_WUC_PME_EN);
4103                 ew32(WUFC, wufc);
4104                 pci_enable_wake(pdev, PCI_D3hot, 1);
4105                 pci_enable_wake(pdev, PCI_D3cold, 1);
4106         } else {
4107                 ew32(WUC, 0);
4108                 ew32(WUFC, 0);
4109                 pci_enable_wake(pdev, PCI_D3hot, 0);
4110                 pci_enable_wake(pdev, PCI_D3cold, 0);
4111         }
4112
4113         /* make sure adapter isn't asleep if manageability is enabled */
4114         if (adapter->flags & FLAG_MNG_PT_ENABLED) {
4115                 pci_enable_wake(pdev, PCI_D3hot, 1);
4116                 pci_enable_wake(pdev, PCI_D3cold, 1);
4117         }
4118
4119         if (adapter->hw.phy.type == e1000_phy_igp_3)
4120                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4121
4122         /*
4123          * Release control of h/w to f/w.  If f/w is AMT enabled, this
4124          * would have already happened in close and is redundant.
4125          */
4126         e1000_release_hw_control(adapter);
4127
4128         pci_disable_device(pdev);
4129
4130         pci_set_power_state(pdev, pci_choose_state(pdev, state));
4131
4132         return 0;
4133 }
4134
4135 static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4136 {
4137         int pos;
4138         u16 val;
4139
4140         /*
4141          * 82573 workaround - disable L1 ASPM on mobile chipsets
4142          *
4143          * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4144          * resulting in lost data or garbage information on the pci-e link
4145          * level. This could result in (false) bad EEPROM checksum errors,
4146          * long ping times (up to 2s) or even a system freeze/hang.
4147          *
4148          * Unfortunately this feature saves about 1W power consumption when
4149          * active.
4150          */
4151         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
4152         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4153         if (val & 0x2) {
4154                 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4155                 val &= ~0x2;
4156                 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4157         }
4158 }
4159
4160 #ifdef CONFIG_PM
4161 static int e1000_resume(struct pci_dev *pdev)
4162 {
4163         struct net_device *netdev = pci_get_drvdata(pdev);
4164         struct e1000_adapter *adapter = netdev_priv(netdev);
4165         struct e1000_hw *hw = &adapter->hw;
4166         u32 err;
4167
4168         pci_set_power_state(pdev, PCI_D0);
4169         pci_restore_state(pdev);
4170         e1000e_disable_l1aspm(pdev);
4171
4172         err = pci_enable_device_mem(pdev);
4173         if (err) {
4174                 dev_err(&pdev->dev,
4175                         "Cannot enable PCI device from suspend\n");
4176                 return err;
4177         }
4178
4179         pci_set_master(pdev);
4180
4181         pci_enable_wake(pdev, PCI_D3hot, 0);
4182         pci_enable_wake(pdev, PCI_D3cold, 0);
4183
4184         if (netif_running(netdev)) {
4185                 err = e1000_request_irq(adapter);
4186                 if (err)
4187                         return err;
4188         }
4189
4190         e1000e_power_up_phy(adapter);
4191         e1000e_reset(adapter);
4192         ew32(WUS, ~0);
4193
4194         e1000_init_manageability(adapter);
4195
4196         if (netif_running(netdev))
4197                 e1000e_up(adapter);
4198
4199         netif_device_attach(netdev);
4200
4201         /*
4202          * If the controller has AMT, do not set DRV_LOAD until the interface
4203          * is up.  For all other cases, let the f/w know that the h/w is now
4204          * under the control of the driver.
4205          */
4206         if (!(adapter->flags & FLAG_HAS_AMT))
4207                 e1000_get_hw_control(adapter);
4208
4209         return 0;
4210 }
4211 #endif
4212
4213 static void e1000_shutdown(struct pci_dev *pdev)
4214 {
4215         e1000_suspend(pdev, PMSG_SUSPEND);
4216 }
4217
4218 #ifdef CONFIG_NET_POLL_CONTROLLER
4219 /*
4220  * Polling 'interrupt' - used by things like netconsole to send skbs
4221  * without having to re-enable interrupts. It's not called while
4222  * the interrupt routine is executing.
4223  */
4224 static void e1000_netpoll(struct net_device *netdev)
4225 {
4226         struct e1000_adapter *adapter = netdev_priv(netdev);
4227
4228         disable_irq(adapter->pdev->irq);
4229         e1000_intr(adapter->pdev->irq, netdev);
4230
4231         enable_irq(adapter->pdev->irq);
4232 }
4233 #endif
4234
4235 /**
4236  * e1000_io_error_detected - called when PCI error is detected
4237  * @pdev: Pointer to PCI device
4238  * @state: The current pci connection state
4239  *
4240  * This function is called after a PCI bus error affecting
4241  * this device has been detected.
4242  */
4243 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4244                                                 pci_channel_state_t state)
4245 {
4246         struct net_device *netdev = pci_get_drvdata(pdev);
4247         struct e1000_adapter *adapter = netdev_priv(netdev);
4248
4249         netif_device_detach(netdev);
4250
4251         if (netif_running(netdev))
4252                 e1000e_down(adapter);
4253         pci_disable_device(pdev);
4254
4255         /* Request a slot slot reset. */
4256         return PCI_ERS_RESULT_NEED_RESET;
4257 }
4258
4259 /**
4260  * e1000_io_slot_reset - called after the pci bus has been reset.
4261  * @pdev: Pointer to PCI device
4262  *
4263  * Restart the card from scratch, as if from a cold-boot. Implementation
4264  * resembles the first-half of the e1000_resume routine.
4265  */
4266 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4267 {
4268         struct net_device *netdev = pci_get_drvdata(pdev);
4269         struct e1000_adapter *adapter = netdev_priv(netdev);
4270         struct e1000_hw *hw = &adapter->hw;
4271         int err;
4272
4273         e1000e_disable_l1aspm(pdev);
4274         err = pci_enable_device_mem(pdev);
4275         if (err) {
4276                 dev_err(&pdev->dev,
4277                         "Cannot re-enable PCI device after reset.\n");
4278                 return PCI_ERS_RESULT_DISCONNECT;
4279         }
4280         pci_set_master(pdev);
4281         pci_restore_state(pdev);
4282
4283         pci_enable_wake(pdev, PCI_D3hot, 0);
4284         pci_enable_wake(pdev, PCI_D3cold, 0);
4285
4286         e1000e_reset(adapter);
4287         ew32(WUS, ~0);
4288
4289         return PCI_ERS_RESULT_RECOVERED;
4290 }
4291
4292 /**
4293  * e1000_io_resume - called when traffic can start flowing again.
4294  * @pdev: Pointer to PCI device
4295  *
4296  * This callback is called when the error recovery driver tells us that
4297  * its OK to resume normal operation. Implementation resembles the
4298  * second-half of the e1000_resume routine.
4299  */
4300 static void e1000_io_resume(struct pci_dev *pdev)
4301 {
4302         struct net_device *netdev = pci_get_drvdata(pdev);
4303         struct e1000_adapter *adapter = netdev_priv(netdev);
4304
4305         e1000_init_manageability(adapter);
4306
4307         if (netif_running(netdev)) {
4308                 if (e1000e_up(adapter)) {
4309                         dev_err(&pdev->dev,
4310                                 "can't bring device back up after reset\n");
4311                         return;
4312                 }
4313         }
4314
4315         netif_device_attach(netdev);
4316
4317         /*
4318          * If the controller has AMT, do not set DRV_LOAD until the interface
4319          * is up.  For all other cases, let the f/w know that the h/w is now
4320          * under the control of the driver.
4321          */
4322         if (!(adapter->flags & FLAG_HAS_AMT))
4323                 e1000_get_hw_control(adapter);
4324
4325 }
4326
4327 static void e1000_print_device_info(struct e1000_adapter *adapter)
4328 {
4329         struct e1000_hw *hw = &adapter->hw;
4330         struct net_device *netdev = adapter->netdev;
4331         u32 pba_num;
4332
4333         /* print bus type/speed/width info */
4334         e_info("(PCI Express:2.5GB/s:%s) %02x:%02x:%02x:%02x:%02x:%02x\n",
4335                /* bus width */
4336                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4337                 "Width x1"),
4338                /* MAC address */
4339                netdev->dev_addr[0], netdev->dev_addr[1],
4340                netdev->dev_addr[2], netdev->dev_addr[3],
4341                netdev->dev_addr[4], netdev->dev_addr[5]);
4342         e_info("Intel(R) PRO/%s Network Connection\n",
4343                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
4344         e1000e_read_pba_num(hw, &pba_num);
4345         e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4346                hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
4347 }
4348
4349 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4350 {
4351         struct e1000_hw *hw = &adapter->hw;
4352         int ret_val;
4353         u16 buf = 0;
4354
4355         if (hw->mac.type != e1000_82573)
4356                 return;
4357
4358         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
4359         if (!(le16_to_cpu(buf) & (1 << 0))) {
4360                 /* Deep Smart Power Down (DSPD) */
4361                 e_warn("Warning: detected DSPD enabled in EEPROM\n");
4362         }
4363
4364         ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
4365         if (le16_to_cpu(buf) & (3 << 2)) {
4366                 /* ASPM enable */
4367                 e_warn("Warning: detected ASPM enabled in EEPROM\n");
4368         }
4369 }
4370
4371 /**
4372  * e1000_probe - Device Initialization Routine
4373  * @pdev: PCI device information struct
4374  * @ent: entry in e1000_pci_tbl
4375  *
4376  * Returns 0 on success, negative on failure
4377  *
4378  * e1000_probe initializes an adapter identified by a pci_dev structure.
4379  * The OS initialization, configuring of the adapter private structure,
4380  * and a hardware reset occur.
4381  **/
4382 static int __devinit e1000_probe(struct pci_dev *pdev,
4383                                  const struct pci_device_id *ent)
4384 {
4385         struct net_device *netdev;
4386         struct e1000_adapter *adapter;
4387         struct e1000_hw *hw;
4388         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
4389         resource_size_t mmio_start, mmio_len;
4390         resource_size_t flash_start, flash_len;
4391
4392         static int cards_found;
4393         int i, err, pci_using_dac;
4394         u16 eeprom_data = 0;
4395         u16 eeprom_apme_mask = E1000_EEPROM_APME;
4396
4397         e1000e_disable_l1aspm(pdev);
4398
4399         err = pci_enable_device_mem(pdev);
4400         if (err)
4401                 return err;
4402
4403         pci_using_dac = 0;
4404         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
4405         if (!err) {
4406                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
4407                 if (!err)
4408                         pci_using_dac = 1;
4409         } else {
4410                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
4411                 if (err) {
4412                         err = pci_set_consistent_dma_mask(pdev,
4413                                                           DMA_32BIT_MASK);
4414                         if (err) {
4415                                 dev_err(&pdev->dev, "No usable DMA "
4416                                         "configuration, aborting\n");
4417                                 goto err_dma;
4418                         }
4419                 }
4420         }
4421
4422         err = pci_request_selected_regions(pdev,
4423                                           pci_select_bars(pdev, IORESOURCE_MEM),
4424                                           e1000e_driver_name);
4425         if (err)
4426                 goto err_pci_reg;
4427
4428         pci_set_master(pdev);
4429         pci_save_state(pdev);
4430
4431         err = -ENOMEM;
4432         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
4433         if (!netdev)
4434                 goto err_alloc_etherdev;
4435
4436         SET_NETDEV_DEV(netdev, &pdev->dev);
4437
4438         pci_set_drvdata(pdev, netdev);
4439         adapter = netdev_priv(netdev);
4440         hw = &adapter->hw;
4441         adapter->netdev = netdev;
4442         adapter->pdev = pdev;
4443         adapter->ei = ei;
4444         adapter->pba = ei->pba;
4445         adapter->flags = ei->flags;
4446         adapter->hw.adapter = adapter;
4447         adapter->hw.mac.type = ei->mac;
4448         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
4449
4450         mmio_start = pci_resource_start(pdev, 0);
4451         mmio_len = pci_resource_len(pdev, 0);
4452
4453         err = -EIO;
4454         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
4455         if (!adapter->hw.hw_addr)
4456                 goto err_ioremap;
4457
4458         if ((adapter->flags & FLAG_HAS_FLASH) &&
4459             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
4460                 flash_start = pci_resource_start(pdev, 1);
4461                 flash_len = pci_resource_len(pdev, 1);
4462                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
4463                 if (!adapter->hw.flash_address)
4464                         goto err_flashmap;
4465         }
4466
4467         /* construct the net_device struct */
4468         netdev->open                    = &e1000_open;
4469         netdev->stop                    = &e1000_close;
4470         netdev->hard_start_xmit         = &e1000_xmit_frame;
4471         netdev->get_stats               = &e1000_get_stats;
4472         netdev->set_multicast_list      = &e1000_set_multi;
4473         netdev->set_mac_address         = &e1000_set_mac;
4474         netdev->change_mtu              = &e1000_change_mtu;
4475         netdev->do_ioctl                = &e1000_ioctl;
4476         e1000e_set_ethtool_ops(netdev);
4477         netdev->tx_timeout              = &e1000_tx_timeout;
4478         netdev->watchdog_timeo          = 5 * HZ;
4479         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
4480         netdev->vlan_rx_register        = e1000_vlan_rx_register;
4481         netdev->vlan_rx_add_vid         = e1000_vlan_rx_add_vid;
4482         netdev->vlan_rx_kill_vid        = e1000_vlan_rx_kill_vid;
4483 #ifdef CONFIG_NET_POLL_CONTROLLER
4484         netdev->poll_controller         = e1000_netpoll;
4485 #endif
4486         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
4487
4488         netdev->mem_start = mmio_start;
4489         netdev->mem_end = mmio_start + mmio_len;
4490
4491         adapter->bd_number = cards_found++;
4492
4493         e1000e_check_options(adapter);
4494
4495         /* setup adapter struct */
4496         err = e1000_sw_init(adapter);
4497         if (err)
4498                 goto err_sw_init;
4499
4500         err = -EIO;
4501
4502         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
4503         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
4504         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
4505
4506         err = ei->get_variants(adapter);
4507         if (err)
4508                 goto err_hw_init;
4509
4510         if ((adapter->flags & FLAG_IS_ICH) &&
4511             (adapter->flags & FLAG_READ_ONLY_NVM))
4512                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
4513
4514         hw->mac.ops.get_bus_info(&adapter->hw);
4515
4516         adapter->hw.phy.autoneg_wait_to_complete = 0;
4517
4518         /* Copper options */
4519         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
4520                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
4521                 adapter->hw.phy.disable_polarity_correction = 0;
4522                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
4523         }
4524
4525         if (e1000_check_reset_block(&adapter->hw))
4526                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
4527
4528         netdev->features = NETIF_F_SG |
4529                            NETIF_F_HW_CSUM |
4530                            NETIF_F_HW_VLAN_TX |
4531                            NETIF_F_HW_VLAN_RX;
4532
4533         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
4534                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
4535
4536         netdev->features |= NETIF_F_TSO;
4537         netdev->features |= NETIF_F_TSO6;
4538
4539         netdev->vlan_features |= NETIF_F_TSO;
4540         netdev->vlan_features |= NETIF_F_TSO6;
4541         netdev->vlan_features |= NETIF_F_HW_CSUM;
4542         netdev->vlan_features |= NETIF_F_SG;
4543
4544         if (pci_using_dac)
4545                 netdev->features |= NETIF_F_HIGHDMA;
4546
4547         /*
4548          * We should not be using LLTX anymore, but we are still Tx faster with
4549          * it.
4550          */
4551         netdev->features |= NETIF_F_LLTX;
4552
4553         if (e1000e_enable_mng_pass_thru(&adapter->hw))
4554                 adapter->flags |= FLAG_MNG_PT_ENABLED;
4555
4556         /*
4557          * before reading the NVM, reset the controller to
4558          * put the device in a known good starting state
4559          */
4560         adapter->hw.mac.ops.reset_hw(&adapter->hw);
4561
4562         /*
4563          * systems with ASPM and others may see the checksum fail on the first
4564          * attempt. Let's give it a few tries
4565          */
4566         for (i = 0;; i++) {
4567                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
4568                         break;
4569                 if (i == 2) {
4570                         e_err("The NVM Checksum Is Not Valid\n");
4571                         err = -EIO;
4572                         goto err_eeprom;
4573                 }
4574         }
4575
4576         e1000_eeprom_checks(adapter);
4577
4578         /* copy the MAC address out of the NVM */
4579         if (e1000e_read_mac_addr(&adapter->hw))
4580                 e_err("NVM Read Error while reading MAC address\n");
4581
4582         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
4583         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
4584
4585         if (!is_valid_ether_addr(netdev->perm_addr)) {
4586                 e_err("Invalid MAC Address: %02x:%02x:%02x:%02x:%02x:%02x\n",
4587                       netdev->perm_addr[0], netdev->perm_addr[1],
4588                       netdev->perm_addr[2], netdev->perm_addr[3],
4589                       netdev->perm_addr[4], netdev->perm_addr[5]);
4590                 err = -EIO;
4591                 goto err_eeprom;
4592         }
4593
4594         init_timer(&adapter->watchdog_timer);
4595         adapter->watchdog_timer.function = &e1000_watchdog;
4596         adapter->watchdog_timer.data = (unsigned long) adapter;
4597
4598         init_timer(&adapter->phy_info_timer);
4599         adapter->phy_info_timer.function = &e1000_update_phy_info;
4600         adapter->phy_info_timer.data = (unsigned long) adapter;
4601
4602         INIT_WORK(&adapter->reset_task, e1000_reset_task);
4603         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
4604         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
4605         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
4606
4607         /* Initialize link parameters. User can change them with ethtool */
4608         adapter->hw.mac.autoneg = 1;
4609         adapter->fc_autoneg = 1;
4610         adapter->hw.fc.original_type = e1000_fc_default;
4611         adapter->hw.fc.type = e1000_fc_default;
4612         adapter->hw.phy.autoneg_advertised = 0x2f;
4613
4614         /* ring size defaults */
4615         adapter->rx_ring->count = 256;
4616         adapter->tx_ring->count = 256;
4617
4618         /*
4619          * Initial Wake on LAN setting - If APM wake is enabled in
4620          * the EEPROM, enable the ACPI Magic Packet filter
4621          */
4622         if (adapter->flags & FLAG_APME_IN_WUC) {
4623                 /* APME bit in EEPROM is mapped to WUC.APME */
4624                 eeprom_data = er32(WUC);
4625                 eeprom_apme_mask = E1000_WUC_APME;
4626         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
4627                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
4628                     (adapter->hw.bus.func == 1))
4629                         e1000_read_nvm(&adapter->hw,
4630                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
4631                 else
4632                         e1000_read_nvm(&adapter->hw,
4633                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
4634         }
4635
4636         /* fetch WoL from EEPROM */
4637         if (eeprom_data & eeprom_apme_mask)
4638                 adapter->eeprom_wol |= E1000_WUFC_MAG;
4639
4640         /*
4641          * now that we have the eeprom settings, apply the special cases
4642          * where the eeprom may be wrong or the board simply won't support
4643          * wake on lan on a particular port
4644          */
4645         if (!(adapter->flags & FLAG_HAS_WOL))
4646                 adapter->eeprom_wol = 0;
4647
4648         /* initialize the wol settings based on the eeprom settings */
4649         adapter->wol = adapter->eeprom_wol;
4650
4651         /* reset the hardware with the new settings */
4652         e1000e_reset(adapter);
4653
4654         /*
4655          * If the controller has AMT, do not set DRV_LOAD until the interface
4656          * is up.  For all other cases, let the f/w know that the h/w is now
4657          * under the control of the driver.
4658          */
4659         if (!(adapter->flags & FLAG_HAS_AMT))
4660                 e1000_get_hw_control(adapter);
4661
4662         /* tell the stack to leave us alone until e1000_open() is called */
4663         netif_carrier_off(netdev);
4664         netif_tx_stop_all_queues(netdev);
4665
4666         strcpy(netdev->name, "eth%d");
4667         err = register_netdev(netdev);
4668         if (err)
4669                 goto err_register;
4670
4671         e1000_print_device_info(adapter);
4672
4673         return 0;
4674
4675 err_register:
4676         if (!(adapter->flags & FLAG_HAS_AMT))
4677                 e1000_release_hw_control(adapter);
4678 err_eeprom:
4679         if (!e1000_check_reset_block(&adapter->hw))
4680                 e1000_phy_hw_reset(&adapter->hw);
4681 err_hw_init:
4682
4683         kfree(adapter->tx_ring);
4684         kfree(adapter->rx_ring);
4685 err_sw_init:
4686         if (adapter->hw.flash_address)
4687                 iounmap(adapter->hw.flash_address);
4688 err_flashmap:
4689         iounmap(adapter->hw.hw_addr);
4690 err_ioremap:
4691         free_netdev(netdev);
4692 err_alloc_etherdev:
4693         pci_release_selected_regions(pdev,
4694                                      pci_select_bars(pdev, IORESOURCE_MEM));
4695 err_pci_reg:
4696 err_dma:
4697         pci_disable_device(pdev);
4698         return err;
4699 }
4700
4701 /**
4702  * e1000_remove - Device Removal Routine
4703  * @pdev: PCI device information struct
4704  *
4705  * e1000_remove is called by the PCI subsystem to alert the driver
4706  * that it should release a PCI device.  The could be caused by a
4707  * Hot-Plug event, or because the driver is going to be removed from
4708  * memory.
4709  **/
4710 static void __devexit e1000_remove(struct pci_dev *pdev)
4711 {
4712         struct net_device *netdev = pci_get_drvdata(pdev);
4713         struct e1000_adapter *adapter = netdev_priv(netdev);
4714
4715         /*
4716          * flush_scheduled work may reschedule our watchdog task, so
4717          * explicitly disable watchdog tasks from being rescheduled
4718          */
4719         set_bit(__E1000_DOWN, &adapter->state);
4720         del_timer_sync(&adapter->watchdog_timer);
4721         del_timer_sync(&adapter->phy_info_timer);
4722
4723         flush_scheduled_work();
4724
4725         /*
4726          * Release control of h/w to f/w.  If f/w is AMT enabled, this
4727          * would have already happened in close and is redundant.
4728          */
4729         e1000_release_hw_control(adapter);
4730
4731         unregister_netdev(netdev);
4732
4733         if (!e1000_check_reset_block(&adapter->hw))
4734                 e1000_phy_hw_reset(&adapter->hw);
4735
4736         kfree(adapter->tx_ring);
4737         kfree(adapter->rx_ring);
4738
4739         iounmap(adapter->hw.hw_addr);
4740         if (adapter->hw.flash_address)
4741                 iounmap(adapter->hw.flash_address);
4742         pci_release_selected_regions(pdev,
4743                                      pci_select_bars(pdev, IORESOURCE_MEM));
4744
4745         free_netdev(netdev);
4746
4747         pci_disable_device(pdev);
4748 }
4749
4750 /* PCI Error Recovery (ERS) */
4751 static struct pci_error_handlers e1000_err_handler = {
4752         .error_detected = e1000_io_error_detected,
4753         .slot_reset = e1000_io_slot_reset,
4754         .resume = e1000_io_resume,
4755 };
4756
4757 static struct pci_device_id e1000_pci_tbl[] = {
4758         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
4759         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
4760         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
4761         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
4762         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
4763         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
4764         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
4765         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
4766         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
4767
4768         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
4769         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
4770         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
4771         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
4772
4773         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
4774         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
4775         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
4776
4777         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
4778           board_80003es2lan },
4779         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
4780           board_80003es2lan },
4781         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
4782           board_80003es2lan },
4783         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
4784           board_80003es2lan },
4785
4786         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
4787         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
4788         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
4789         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
4790         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
4791         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
4792         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
4793
4794         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
4795         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
4796         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
4797         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
4798         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
4799         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
4800         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
4801         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
4802
4803         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
4804         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
4805         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
4806
4807         { }     /* terminate list */
4808 };
4809 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
4810
4811 /* PCI Device API Driver */
4812 static struct pci_driver e1000_driver = {
4813         .name     = e1000e_driver_name,
4814         .id_table = e1000_pci_tbl,
4815         .probe    = e1000_probe,
4816         .remove   = __devexit_p(e1000_remove),
4817 #ifdef CONFIG_PM
4818         /* Power Management Hooks */
4819         .suspend  = e1000_suspend,
4820         .resume   = e1000_resume,
4821 #endif
4822         .shutdown = e1000_shutdown,
4823         .err_handler = &e1000_err_handler
4824 };
4825
4826 /**
4827  * e1000_init_module - Driver Registration Routine
4828  *
4829  * e1000_init_module is the first routine called when the driver is
4830  * loaded. All it does is register with the PCI subsystem.
4831  **/
4832 static int __init e1000_init_module(void)
4833 {
4834         int ret;
4835         printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
4836                e1000e_driver_name, e1000e_driver_version);
4837         printk(KERN_INFO "%s: Copyright (c) 1999-2008 Intel Corporation.\n",
4838                e1000e_driver_name);
4839         ret = pci_register_driver(&e1000_driver);
4840         pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY, e1000e_driver_name,
4841                                PM_QOS_DEFAULT_VALUE);
4842
4843         return ret;
4844 }
4845 module_init(e1000_init_module);
4846
4847 /**
4848  * e1000_exit_module - Driver Exit Cleanup Routine
4849  *
4850  * e1000_exit_module is called just before the driver is removed
4851  * from memory.
4852  **/
4853 static void __exit e1000_exit_module(void)
4854 {
4855         pci_unregister_driver(&e1000_driver);
4856         pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY, e1000e_driver_name);
4857 }
4858 module_exit(e1000_exit_module);
4859
4860
4861 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
4862 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
4863 MODULE_LICENSE("GPL");
4864 MODULE_VERSION(DRV_VERSION);
4865
4866 /* e1000_main.c */