drivers/net/e1000e/netdev.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2007 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
  47 #include "e1000.h"
  48
  49 #define DRV_VERSION "0.2.0"
  50 char e1000e_driver_name[] = "e1000e";
  51 const char e1000e_driver_version[] = DRV_VERSION;
  52
  53 static const struct e1000_info *e1000_info_tbl[] = {
  54         [board_82571]           = &e1000_82571_info,
  55         [board_82572]           = &e1000_82572_info,
  56         [board_82573]           = &e1000_82573_info,
  57         [board_80003es2lan]     = &e1000_es2_info,
  58         [board_ich8lan]         = &e1000_ich8_info,
  59         [board_ich9lan]         = &e1000_ich9_info,
  60 };
  61
  62 #ifdef DEBUG
  63 /**
  64  * e1000_get_hw_dev_name - return device name string
  65  * used by hardware layer to print debugging information
  66  **/
  67 char *e1000e_get_hw_dev_name(struct e1000_hw *hw)
  68 {
  69         return hw->adapter->netdev->name;
  70 }
  71 #endif
  72
  73 /**
  74  * e1000_desc_unused - calculate if we have unused descriptors
  75  **/
  76 static int e1000_desc_unused(struct e1000_ring *ring)
  77 {
  78         if (ring->next_to_clean > ring->next_to_use)
  79                 return ring->next_to_clean - ring->next_to_use - 1;
  80
  81         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  82 }
  83
  84 /**
  85  * e1000_receive_skb - helper function to handle rx indications
  86  * @adapter: board private structure
  87  * @status: descriptor status field as written by hardware
  88  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  89  * @skb: pointer to sk_buff to be indicated to stack
  90  **/
  91 static void e1000_receive_skb(struct e1000_adapter *adapter,
  92                               struct net_device *netdev,
  93                               struct sk_buff *skb,
  94                               u8 status, __le16 vlan)
  95 {
  96         skb->protocol = eth_type_trans(skb, netdev);
  97
  98         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
  99                 vlan_hwaccel_receive_skb(skb, adapter->vlgrp,
 100                                          le16_to_cpu(vlan) &
 101                                          E1000_RXD_SPC_VLAN_MASK);
 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                 /* IP fragment with UDP payload */
 142                 /* Hardware complements the payload checksum, so we undo it
 143                  * and then put the value in host order for further stack use.
 144                  */
 145                 __sum16 sum = (__force __sum16)htons(csum);
 146                 skb->csum = csum_unfold(~sum);
 147                 skb->ip_summed = CHECKSUM_COMPLETE;
 148         }
 149         adapter->hw_csum_good++;
 150 }
 151
 152 /**
 153  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 154  * @adapter: address of board private structure
 155  **/
 156 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 157                                    int cleaned_count)
 158 {
 159         struct net_device *netdev = adapter->netdev;
 160         struct pci_dev *pdev = adapter->pdev;
 161         struct e1000_ring *rx_ring = adapter->rx_ring;
 162         struct e1000_rx_desc *rx_desc;
 163         struct e1000_buffer *buffer_info;
 164         struct sk_buff *skb;
 165         unsigned int i;
 166         unsigned int bufsz = adapter->rx_buffer_len + NET_IP_ALIGN;
 167
 168         i = rx_ring->next_to_use;
 169         buffer_info = &rx_ring->buffer_info[i];
 170
 171         while (cleaned_count--) {
 172                 skb = buffer_info->skb;
 173                 if (skb) {
 174                         skb_trim(skb, 0);
 175                         goto map_skb;
 176                 }
 177
 178                 skb = netdev_alloc_skb(netdev, bufsz);
 179                 if (!skb) {
 180                         /* Better luck next round */
 181                         adapter->alloc_rx_buff_failed++;
 182                         break;
 183                 }
 184
 185                 /* Make buffer alignment 2 beyond a 16 byte boundary
 186                  * this will result in a 16 byte aligned IP header after
 187                  * the 14 byte MAC header is removed
 188                  */
 189                 skb_reserve(skb, NET_IP_ALIGN);
 190
 191                 buffer_info->skb = skb;
 192 map_skb:
 193                 buffer_info->dma = pci_map_single(pdev, skb->data,
 194                                                   adapter->rx_buffer_len,
 195                                                   PCI_DMA_FROMDEVICE);
 196                 if (pci_dma_mapping_error(buffer_info->dma)) {
 197                         dev_err(&pdev->dev, "RX DMA map failed\n");
 198                         adapter->rx_dma_failed++;
 199                         break;
 200                 }
 201
 202                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 203                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 204
 205                 i++;
 206                 if (i == rx_ring->count)
 207                         i = 0;
 208                 buffer_info = &rx_ring->buffer_info[i];
 209         }
 210
 211         if (rx_ring->next_to_use != i) {
 212                 rx_ring->next_to_use = i;
 213                 if (i-- == 0)
 214                         i = (rx_ring->count - 1);
 215
 216                 /* Force memory writes to complete before letting h/w
 217                  * know there are new descriptors to fetch.  (Only
 218                  * applicable for weak-ordered memory model archs,
 219                  * such as IA-64). */
 220                 wmb();
 221                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 222         }
 223 }
 224
 225 /**
 226  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 227  * @adapter: address of board private structure
 228  **/
 229 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 230                                       int cleaned_count)
 231 {
 232         struct net_device *netdev = adapter->netdev;
 233         struct pci_dev *pdev = adapter->pdev;
 234         union e1000_rx_desc_packet_split *rx_desc;
 235         struct e1000_ring *rx_ring = adapter->rx_ring;
 236         struct e1000_buffer *buffer_info;
 237         struct e1000_ps_page *ps_page;
 238         struct sk_buff *skb;
 239         unsigned int i, j;
 240
 241         i = rx_ring->next_to_use;
 242         buffer_info = &rx_ring->buffer_info[i];
 243
 244         while (cleaned_count--) {
 245                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 246
 247                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 248                         ps_page = &buffer_info->ps_pages[j];
 249                         if (j >= adapter->rx_ps_pages) {
 250                                 /* all unused desc entries get hw null ptr */
 251                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 252                                 continue;
 253                         }
 254                         if (!ps_page->page) {
 255                                 ps_page->page = alloc_page(GFP_ATOMIC);
 256                                 if (!ps_page->page) {
 257                                         adapter->alloc_rx_buff_failed++;
 258                                         goto no_buffers;
 259                                 }
 260                                 ps_page->dma = pci_map_page(pdev,
 261                                                    ps_page->page,
 262                                                    0, PAGE_SIZE,
 263                                                    PCI_DMA_FROMDEVICE);
 264                                 if (pci_dma_mapping_error(ps_page->dma)) {
 265                                         dev_err(&adapter->pdev->dev,
 266                                           "RX DMA page map failed\n");
 267                                         adapter->rx_dma_failed++;
 268                                         goto no_buffers;
 269                                 }
 270                         }
 271                         /*
 272                          * Refresh the desc even if buffer_addrs
 273                          * didn't change because each write-back
 274                          * erases this info.
 275                          */
 276                         rx_desc->read.buffer_addr[j+1] =
 277                              cpu_to_le64(ps_page->dma);
 278                 }
 279
 280                 skb = netdev_alloc_skb(netdev,
 281                                        adapter->rx_ps_bsize0 + NET_IP_ALIGN);
 282
 283                 if (!skb) {
 284                         adapter->alloc_rx_buff_failed++;
 285                         break;
 286                 }
 287
 288                 /* Make buffer alignment 2 beyond a 16 byte boundary
 289                  * this will result in a 16 byte aligned IP header after
 290                  * the 14 byte MAC header is removed
 291                  */
 292                 skb_reserve(skb, NET_IP_ALIGN);
 293
 294                 buffer_info->skb = skb;
 295                 buffer_info->dma = pci_map_single(pdev, skb->data,
 296                                                   adapter->rx_ps_bsize0,
 297                                                   PCI_DMA_FROMDEVICE);
 298                 if (pci_dma_mapping_error(buffer_info->dma)) {
 299                         dev_err(&pdev->dev, "RX DMA map failed\n");
 300                         adapter->rx_dma_failed++;
 301                         /* cleanup skb */
 302                         dev_kfree_skb_any(skb);
 303                         buffer_info->skb = NULL;
 304                         break;
 305                 }
 306
 307                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 308
 309                 i++;
 310                 if (i == rx_ring->count)
 311                         i = 0;
 312                 buffer_info = &rx_ring->buffer_info[i];
 313         }
 314
 315 no_buffers:
 316         if (rx_ring->next_to_use != i) {
 317                 rx_ring->next_to_use = i;
 318
 319                 if (!(i--))
 320                         i = (rx_ring->count - 1);
 321
 322                 /* Force memory writes to complete before letting h/w
 323                  * know there are new descriptors to fetch.  (Only
 324                  * applicable for weak-ordered memory model archs,
 325                  * such as IA-64). */
 326                 wmb();
 327                 /* Hardware increments by 16 bytes, but packet split
 328                  * descriptors are 32 bytes...so we increment tail
 329                  * twice as much.
 330                  */
 331                 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 332         }
 333 }
 334
 335 /**
 336  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 337  * @adapter: board private structure
 338  *
 339  * the return value indicates whether actual cleaning was done, there
 340  * is no guarantee that everything was cleaned
 341  **/
 342 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 343                                int *work_done, int work_to_do)
 344 {
 345         struct net_device *netdev = adapter->netdev;
 346         struct pci_dev *pdev = adapter->pdev;
 347         struct e1000_ring *rx_ring = adapter->rx_ring;
 348         struct e1000_rx_desc *rx_desc, *next_rxd;
 349         struct e1000_buffer *buffer_info, *next_buffer;
 350         u32 length;
 351         unsigned int i;
 352         int cleaned_count = 0;
 353         bool cleaned = 0;
 354         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 355
 356         i = rx_ring->next_to_clean;
 357         rx_desc = E1000_RX_DESC(*rx_ring, i);
 358         buffer_info = &rx_ring->buffer_info[i];
 359
 360         while (rx_desc->status & E1000_RXD_STAT_DD) {
 361                 struct sk_buff *skb;
 362                 u8 status;
 363
 364                 if (*work_done >= work_to_do)
 365                         break;
 366                 (*work_done)++;
 367
 368                 status = rx_desc->status;
 369                 skb = buffer_info->skb;
 370                 buffer_info->skb = NULL;
 371
 372                 prefetch(skb->data - NET_IP_ALIGN);
 373
 374                 i++;
 375                 if (i == rx_ring->count)
 376                         i = 0;
 377                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 378                 prefetch(next_rxd);
 379
 380                 next_buffer = &rx_ring->buffer_info[i];
 381
 382                 cleaned = 1;
 383                 cleaned_count++;
 384                 pci_unmap_single(pdev,
 385                                  buffer_info->dma,
 386                                  adapter->rx_buffer_len,
 387                                  PCI_DMA_FROMDEVICE);
 388                 buffer_info->dma = 0;
 389
 390                 length = le16_to_cpu(rx_desc->length);
 391
 392                 /* !EOP means multiple descriptors were used to store a single
 393                  * packet, also make sure the frame isn't just CRC only */
 394                 if (!(status & E1000_RXD_STAT_EOP) || (length <= 4)) {
 395                         /* All receives must fit into a single buffer */
 396                         ndev_dbg(netdev, "%s: Receive packet consumed "
 397                                  "multiple buffers\n", netdev->name);
 398                         /* recycle */
 399                         buffer_info->skb = skb;
 400                         goto next_desc;
 401                 }
 402
 403                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 404                         /* recycle */
 405                         buffer_info->skb = skb;
 406                         goto next_desc;
 407                 }
 408
 409                 total_rx_bytes += length;
 410                 total_rx_packets++;
 411
 412                 /* code added for copybreak, this should improve
 413                  * performance for small packets with large amounts
 414                  * of reassembly being done in the stack */
 415                 if (length < copybreak) {
 416                         struct sk_buff *new_skb =
 417                             netdev_alloc_skb(netdev, length + NET_IP_ALIGN);
 418                         if (new_skb) {
 419                                 skb_reserve(new_skb, NET_IP_ALIGN);
 420                                 memcpy(new_skb->data - NET_IP_ALIGN,
 421                                        skb->data - NET_IP_ALIGN,
 422                                        length + NET_IP_ALIGN);
 423                                 /* save the skb in buffer_info as good */
 424                                 buffer_info->skb = skb;
 425                                 skb = new_skb;
 426                         }
 427                         /* else just continue with the old one */
 428                 }
 429                 /* end copybreak code */
 430                 skb_put(skb, length);
 431
 432                 /* Receive Checksum Offload */
 433                 e1000_rx_checksum(adapter,
 434                                   (u32)(status) |
 435                                   ((u32)(rx_desc->errors) << 24),
 436                                   le16_to_cpu(rx_desc->csum), skb);
 437
 438                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 439
 440 next_desc:
 441                 rx_desc->status = 0;
 442
 443                 /* return some buffers to hardware, one at a time is too slow */
 444                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 445                         adapter->alloc_rx_buf(adapter, cleaned_count);
 446                         cleaned_count = 0;
 447                 }
 448
 449                 /* use prefetched values */
 450                 rx_desc = next_rxd;
 451                 buffer_info = next_buffer;
 452         }
 453         rx_ring->next_to_clean = i;
 454
 455         cleaned_count = e1000_desc_unused(rx_ring);
 456         if (cleaned_count)
 457                 adapter->alloc_rx_buf(adapter, cleaned_count);
 458
 459         adapter->total_rx_packets += total_rx_packets;
 460         adapter->total_rx_bytes += total_rx_bytes;
 461         adapter->net_stats.rx_packets += total_rx_packets;
 462         adapter->net_stats.rx_bytes += total_rx_bytes;
 463         return cleaned;
 464 }
 465
 466 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 467                              struct e1000_buffer *buffer_info)
 468 {
 469         if (buffer_info->dma) {
 470                 pci_unmap_page(adapter->pdev, buffer_info->dma,
 471                                buffer_info->length, PCI_DMA_TODEVICE);
 472                 buffer_info->dma = 0;
 473         }
 474         if (buffer_info->skb) {
 475                 dev_kfree_skb_any(buffer_info->skb);
 476                 buffer_info->skb = NULL;
 477         }
 478 }
 479
 480 static void e1000_print_tx_hang(struct e1000_adapter *adapter)
 481 {
 482         struct e1000_ring *tx_ring = adapter->tx_ring;
 483         unsigned int i = tx_ring->next_to_clean;
 484         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 485         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 486         struct net_device *netdev = adapter->netdev;
 487
 488         /* detected Tx unit hang */
 489         ndev_err(netdev,
 490                  "Detected Tx Unit Hang:\n"
 491                  "  TDH                  <%x>\n"
 492                  "  TDT                  <%x>\n"
 493                  "  next_to_use          <%x>\n"
 494                  "  next_to_clean        <%x>\n"
 495                  "buffer_info[next_to_clean]:\n"
 496                  "  time_stamp           <%lx>\n"
 497                  "  next_to_watch        <%x>\n"
 498                  "  jiffies              <%lx>\n"
 499                  "  next_to_watch.status <%x>\n",
 500                  readl(adapter->hw.hw_addr + tx_ring->head),
 501                  readl(adapter->hw.hw_addr + tx_ring->tail),
 502                  tx_ring->next_to_use,
 503                  tx_ring->next_to_clean,
 504                  tx_ring->buffer_info[eop].time_stamp,
 505                  eop,
 506                  jiffies,
 507                  eop_desc->upper.fields.status);
 508 }
 509
 510 /**
 511  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 512  * @adapter: board private structure
 513  *
 514  * the return value indicates whether actual cleaning was done, there
 515  * is no guarantee that everything was cleaned
 516  **/
 517 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 518 {
 519         struct net_device *netdev = adapter->netdev;
 520         struct e1000_hw *hw = &adapter->hw;
 521         struct e1000_ring *tx_ring = adapter->tx_ring;
 522         struct e1000_tx_desc *tx_desc, *eop_desc;
 523         struct e1000_buffer *buffer_info;
 524         unsigned int i, eop;
 525         unsigned int count = 0;
 526         bool cleaned = 0;
 527         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 528
 529         i = tx_ring->next_to_clean;
 530         eop = tx_ring->buffer_info[i].next_to_watch;
 531         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 532
 533         while (eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) {
 534                 for (cleaned = 0; !cleaned; ) {
 535                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 536                         buffer_info = &tx_ring->buffer_info[i];
 537                         cleaned = (i == eop);
 538
 539                         if (cleaned) {
 540                                 struct sk_buff *skb = buffer_info->skb;
 541                                 unsigned int segs, bytecount;
 542                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 543                                 /* multiply data chunks by size of headers */
 544                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 545                                             skb->len;
 546                                 total_tx_packets += segs;
 547                                 total_tx_bytes += bytecount;
 548                         }
 549
 550                         e1000_put_txbuf(adapter, buffer_info);
 551                         tx_desc->upper.data = 0;
 552
 553                         i++;
 554                         if (i == tx_ring->count)
 555                                 i = 0;
 556                 }
 557
 558                 eop = tx_ring->buffer_info[i].next_to_watch;
 559                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
 560 #define E1000_TX_WEIGHT 64
 561                 /* weight of a sort for tx, to avoid endless transmit cleanup */
 562                 if (count++ == E1000_TX_WEIGHT)
 563                         break;
 564         }
 565
 566         tx_ring->next_to_clean = i;
 567
 568 #define TX_WAKE_THRESHOLD 32
 569         if (cleaned && netif_carrier_ok(netdev) &&
 570                      e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
 571                 /* Make sure that anybody stopping the queue after this
 572                  * sees the new next_to_clean.
 573                  */
 574                 smp_mb();
 575
 576                 if (netif_queue_stopped(netdev) &&
 577                     !(test_bit(__E1000_DOWN, &adapter->state))) {
 578                         netif_wake_queue(netdev);
 579                         ++adapter->restart_queue;
 580                 }
 581         }
 582
 583         if (adapter->detect_tx_hung) {
 584                 /* Detect a transmit hang in hardware, this serializes the
 585                  * check with the clearing of time_stamp and movement of i */
 586                 adapter->detect_tx_hung = 0;
 587                 if (tx_ring->buffer_info[eop].dma &&
 588                     time_after(jiffies, tx_ring->buffer_info[eop].time_stamp
 589                                + (adapter->tx_timeout_factor * HZ))
 590                     && !(er32(STATUS) &
 591                          E1000_STATUS_TXOFF)) {
 592                         e1000_print_tx_hang(adapter);
 593                         netif_stop_queue(netdev);
 594                 }
 595         }
 596         adapter->total_tx_bytes += total_tx_bytes;
 597         adapter->total_tx_packets += total_tx_packets;
 598         adapter->net_stats.tx_packets += total_tx_packets;
 599         adapter->net_stats.tx_bytes += total_tx_bytes;
 600         return cleaned;
 601 }
 602
 603 /**
 604  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
 605  * @adapter: board private structure
 606  *
 607  * the return value indicates whether actual cleaning was done, there
 608  * is no guarantee that everything was cleaned
 609  **/
 610 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 611                                   int *work_done, int work_to_do)
 612 {
 613         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
 614         struct net_device *netdev = adapter->netdev;
 615         struct pci_dev *pdev = adapter->pdev;
 616         struct e1000_ring *rx_ring = adapter->rx_ring;
 617         struct e1000_buffer *buffer_info, *next_buffer;
 618         struct e1000_ps_page *ps_page;
 619         struct sk_buff *skb;
 620         unsigned int i, j;
 621         u32 length, staterr;
 622         int cleaned_count = 0;
 623         bool cleaned = 0;
 624         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 625
 626         i = rx_ring->next_to_clean;
 627         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 628         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 629         buffer_info = &rx_ring->buffer_info[i];
 630
 631         while (staterr & E1000_RXD_STAT_DD) {
 632                 if (*work_done >= work_to_do)
 633                         break;
 634                 (*work_done)++;
 635                 skb = buffer_info->skb;
 636
 637                 /* in the packet split case this is header only */
 638                 prefetch(skb->data - NET_IP_ALIGN);
 639
 640                 i++;
 641                 if (i == rx_ring->count)
 642                         i = 0;
 643                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
 644                 prefetch(next_rxd);
 645
 646                 next_buffer = &rx_ring->buffer_info[i];
 647
 648                 cleaned = 1;
 649                 cleaned_count++;
 650                 pci_unmap_single(pdev, buffer_info->dma,
 651                                  adapter->rx_ps_bsize0,
 652                                  PCI_DMA_FROMDEVICE);
 653                 buffer_info->dma = 0;
 654
 655                 if (!(staterr & E1000_RXD_STAT_EOP)) {
 656                         ndev_dbg(netdev, "%s: Packet Split buffers didn't pick "
 657                                  "up the full packet\n", netdev->name);
 658                         dev_kfree_skb_irq(skb);
 659                         goto next_desc;
 660                 }
 661
 662                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 663                         dev_kfree_skb_irq(skb);
 664                         goto next_desc;
 665                 }
 666
 667                 length = le16_to_cpu(rx_desc->wb.middle.length0);
 668
 669                 if (!length) {
 670                         ndev_dbg(netdev, "%s: Last part of the packet spanning"
 671                                  " multiple descriptors\n", netdev->name);
 672                         dev_kfree_skb_irq(skb);
 673                         goto next_desc;
 674                 }
 675
 676                 /* Good Receive */
 677                 skb_put(skb, length);
 678
 679                 {
 680                 /* this looks ugly, but it seems compiler issues make it
 681                    more efficient than reusing j */
 682                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
 683
 684                 /* page alloc/put takes too long and effects small packet
 685                  * throughput, so unsplit small packets and save the alloc/put*/
 686                 if (l1 && (l1 <= copybreak) &&
 687                     ((length + l1) <= adapter->rx_ps_bsize0)) {
 688                         u8 *vaddr;
 689
 690                         ps_page = &buffer_info->ps_pages[0];
 691
 692                         /* there is no documentation about how to call
 693                          * kmap_atomic, so we can't hold the mapping
 694                          * very long */
 695                         pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
 696                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 697                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
 698                         memcpy(skb_tail_pointer(skb), vaddr, l1);
 699                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
 700                         pci_dma_sync_single_for_device(pdev, ps_page->dma,
 701                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 702
 703                         skb_put(skb, l1);
 704                         goto copydone;
 705                 } /* if */
 706                 }
 707
 708                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 709                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
 710                         if (!length)
 711                                 break;
 712
 713                         ps_page = &buffer_info->ps_pages[j];
 714                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 715                                        PCI_DMA_FROMDEVICE);
 716                         ps_page->dma = 0;
 717                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
 718                         ps_page->page = NULL;
 719                         skb->len += length;
 720                         skb->data_len += length;
 721                         skb->truesize += length;
 722                 }
 723
 724 copydone:
 725                 total_rx_bytes += skb->len;
 726                 total_rx_packets++;
 727
 728                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
 729                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
 730
 731                 if (rx_desc->wb.upper.header_status &
 732                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
 733                         adapter->rx_hdr_split++;
 734
 735                 e1000_receive_skb(adapter, netdev, skb,
 736                                   staterr, rx_desc->wb.middle.vlan);
 737
 738 next_desc:
 739                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
 740                 buffer_info->skb = NULL;
 741
 742                 /* return some buffers to hardware, one at a time is too slow */
 743                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 744                         adapter->alloc_rx_buf(adapter, cleaned_count);
 745                         cleaned_count = 0;
 746                 }
 747
 748                 /* use prefetched values */
 749                 rx_desc = next_rxd;
 750                 buffer_info = next_buffer;
 751
 752                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 753         }
 754         rx_ring->next_to_clean = i;
 755
 756         cleaned_count = e1000_desc_unused(rx_ring);
 757         if (cleaned_count)
 758                 adapter->alloc_rx_buf(adapter, cleaned_count);
 759
 760         adapter->total_rx_packets += total_rx_packets;
 761         adapter->total_rx_bytes += total_rx_bytes;
 762         adapter->net_stats.rx_packets += total_rx_packets;
 763         adapter->net_stats.rx_bytes += total_rx_bytes;
 764         return cleaned;
 765 }
 766
 767 /**
 768  * e1000_clean_rx_ring - Free Rx Buffers per Queue
 769  * @adapter: board private structure
 770  **/
 771 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
 772 {
 773         struct e1000_ring *rx_ring = adapter->rx_ring;
 774         struct e1000_buffer *buffer_info;
 775         struct e1000_ps_page *ps_page;
 776         struct pci_dev *pdev = adapter->pdev;
 777         unsigned int i, j;
 778
 779         /* Free all the Rx ring sk_buffs */
 780         for (i = 0; i < rx_ring->count; i++) {
 781                 buffer_info = &rx_ring->buffer_info[i];
 782                 if (buffer_info->dma) {
 783                         if (adapter->clean_rx == e1000_clean_rx_irq)
 784                                 pci_unmap_single(pdev, buffer_info->dma,
 785                                                  adapter->rx_buffer_len,
 786                                                  PCI_DMA_FROMDEVICE);
 787                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
 788                                 pci_unmap_single(pdev, buffer_info->dma,
 789                                                  adapter->rx_ps_bsize0,
 790                                                  PCI_DMA_FROMDEVICE);
 791                         buffer_info->dma = 0;
 792                 }
 793
 794                 if (buffer_info->skb) {
 795                         dev_kfree_skb(buffer_info->skb);
 796                         buffer_info->skb = NULL;
 797                 }
 798
 799                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 800                         ps_page = &buffer_info->ps_pages[j];
 801                         if (!ps_page->page)
 802                                 break;
 803                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 804                                        PCI_DMA_FROMDEVICE);
 805                         ps_page->dma = 0;
 806                         put_page(ps_page->page);
 807                         ps_page->page = NULL;
 808                 }
 809         }
 810
 811         /* there also may be some cached data from a chained receive */
 812         if (rx_ring->rx_skb_top) {
 813                 dev_kfree_skb(rx_ring->rx_skb_top);
 814                 rx_ring->rx_skb_top = NULL;
 815         }
 816
 817         /* Zero out the descriptor ring */
 818         memset(rx_ring->desc, 0, rx_ring->size);
 819
 820         rx_ring->next_to_clean = 0;
 821         rx_ring->next_to_use = 0;
 822
 823         writel(0, adapter->hw.hw_addr + rx_ring->head);
 824         writel(0, adapter->hw.hw_addr + rx_ring->tail);
 825 }
 826
 827 /**
 828  * e1000_intr_msi - Interrupt Handler
 829  * @irq: interrupt number
 830  * @data: pointer to a network interface device structure
 831  **/
 832 static irqreturn_t e1000_intr_msi(int irq, void *data)
 833 {
 834         struct net_device *netdev = data;
 835         struct e1000_adapter *adapter = netdev_priv(netdev);
 836         struct e1000_hw *hw = &adapter->hw;
 837         u32 icr = er32(ICR);
 838
 839         /* read ICR disables interrupts using IAM, so keep up with our
 840          * enable/disable accounting */
 841         atomic_inc(&adapter->irq_sem);
 842
 843         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
 844                 hw->mac.get_link_status = 1;
 845                 /* ICH8 workaround-- Call gig speed drop workaround on cable
 846                  * disconnect (LSC) before accessing any PHY registers */
 847                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
 848                     (!(er32(STATUS) & E1000_STATUS_LU)))
 849                         e1000e_gig_downshift_workaround_ich8lan(hw);
 850
 851                 /* 80003ES2LAN workaround-- For packet buffer work-around on
 852                  * link down event; disable receives here in the ISR and reset
 853                  * adapter in watchdog */
 854                 if (netif_carrier_ok(netdev) &&
 855                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
 856                         /* disable receives */
 857                         u32 rctl = er32(RCTL);
 858                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
 859                 }
 860                 /* guard against interrupt when we're going down */
 861                 if (!test_bit(__E1000_DOWN, &adapter->state))
 862                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
 863         }
 864
 865         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 866                 adapter->total_tx_bytes = 0;
 867                 adapter->total_tx_packets = 0;
 868                 adapter->total_rx_bytes = 0;
 869                 adapter->total_rx_packets = 0;
 870                 __netif_rx_schedule(netdev, &adapter->napi);
 871         } else {
 872                 atomic_dec(&adapter->irq_sem);
 873         }
 874
 875         return IRQ_HANDLED;
 876 }
 877
 878 /**
 879  * e1000_intr - Interrupt Handler
 880  * @irq: interrupt number
 881  * @data: pointer to a network interface device structure
 882  **/
 883 static irqreturn_t e1000_intr(int irq, void *data)
 884 {
 885         struct net_device *netdev = data;
 886         struct e1000_adapter *adapter = netdev_priv(netdev);
 887         struct e1000_hw *hw = &adapter->hw;
 888
 889         u32 rctl, icr = er32(ICR);
 890         if (!icr)
 891                 return IRQ_NONE;  /* Not our interrupt */
 892
 893         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
 894          * not set, then the adapter didn't send an interrupt */
 895         if (!(icr & E1000_ICR_INT_ASSERTED))
 896                 return IRQ_NONE;
 897
 898         /* Interrupt Auto-Mask...upon reading ICR,
 899          * interrupts are masked.  No need for the
 900          * IMC write, but it does mean we should
 901          * account for it ASAP. */
 902         atomic_inc(&adapter->irq_sem);
 903
 904         if (icr & (E1000_ICR_RXSEQ | E1000_ICR_LSC)) {
 905                 hw->mac.get_link_status = 1;
 906                 /* ICH8 workaround-- Call gig speed drop workaround on cable
 907                  * disconnect (LSC) before accessing any PHY registers */
 908                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
 909                     (!(er32(STATUS) & E1000_STATUS_LU)))
 910                         e1000e_gig_downshift_workaround_ich8lan(hw);
 911
 912                 /* 80003ES2LAN workaround--
 913                  * For packet buffer work-around on link down event;
 914                  * disable receives here in the ISR and
 915                  * reset adapter in watchdog
 916                  */
 917                 if (netif_carrier_ok(netdev) &&
 918                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
 919                         /* disable receives */
 920                         rctl = er32(RCTL);
 921                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
 922                 }
 923                 /* guard against interrupt when we're going down */
 924                 if (!test_bit(__E1000_DOWN, &adapter->state))
 925                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
 926         }
 927
 928         if (netif_rx_schedule_prep(netdev, &adapter->napi)) {
 929                 adapter->total_tx_bytes = 0;
 930                 adapter->total_tx_packets = 0;
 931                 adapter->total_rx_bytes = 0;
 932                 adapter->total_rx_packets = 0;
 933                 __netif_rx_schedule(netdev, &adapter->napi);
 934         } else {
 935                 atomic_dec(&adapter->irq_sem);
 936         }
 937
 938         return IRQ_HANDLED;
 939 }
 940
 941 static int e1000_request_irq(struct e1000_adapter *adapter)
 942 {
 943         struct net_device *netdev = adapter->netdev;
 944         irq_handler_t handler = e1000_intr;
 945         int irq_flags = IRQF_SHARED;
 946         int err;
 947
 948         if (!pci_enable_msi(adapter->pdev)) {
 949                 adapter->flags |= FLAG_MSI_ENABLED;
 950                 handler = e1000_intr_msi;
 951                 irq_flags = 0;
 952         }
 953
 954         err = request_irq(adapter->pdev->irq, handler, irq_flags, netdev->name,
 955                           netdev);
 956         if (err) {
 957                 ndev_err(netdev,
 958                        "Unable to allocate %s interrupt (return: %d)\n",
 959                         adapter->flags & FLAG_MSI_ENABLED ? "MSI":"INTx",
 960                         err);
 961                 if (adapter->flags & FLAG_MSI_ENABLED)
 962                         pci_disable_msi(adapter->pdev);
 963         }
 964
 965         return err;
 966 }
 967
 968 static void e1000_free_irq(struct e1000_adapter *adapter)
 969 {
 970         struct net_device *netdev = adapter->netdev;
 971
 972         free_irq(adapter->pdev->irq, netdev);
 973         if (adapter->flags & FLAG_MSI_ENABLED) {
 974                 pci_disable_msi(adapter->pdev);
 975                 adapter->flags &= ~FLAG_MSI_ENABLED;
 976         }
 977 }
 978
 979 /**
 980  * e1000_irq_disable - Mask off interrupt generation on the NIC
 981  **/
 982 static void e1000_irq_disable(struct e1000_adapter *adapter)
 983 {
 984         struct e1000_hw *hw = &adapter->hw;
 985
 986         atomic_inc(&adapter->irq_sem);
 987         ew32(IMC, ~0);
 988         e1e_flush();
 989         synchronize_irq(adapter->pdev->irq);
 990 }
 991
 992 /**
 993  * e1000_irq_enable - Enable default interrupt generation settings
 994  **/
 995 static void e1000_irq_enable(struct e1000_adapter *adapter)
 996 {
 997         struct e1000_hw *hw = &adapter->hw;
 998
 999         if (atomic_dec_and_test(&adapter->irq_sem)) {
1000                 ew32(IMS, IMS_ENABLE_MASK);
1001                 e1e_flush();
1002         }
1003 }
1004
1005 /**
1006  * e1000_get_hw_control - get control of the h/w from f/w
1007  * @adapter: address of board private structure
1008  *
1009  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1010  * For ASF and Pass Through versions of f/w this means that
1011  * the driver is loaded. For AMT version (only with 82573)
1012  * of the f/w this means that the network i/f is open.
1013  **/
1014 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1015 {
1016         struct e1000_hw *hw = &adapter->hw;
1017         u32 ctrl_ext;
1018         u32 swsm;
1019
1020         /* Let firmware know the driver has taken over */
1021         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1022                 swsm = er32(SWSM);
1023                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1024         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1025                 ctrl_ext = er32(CTRL_EXT);
1026                 ew32(CTRL_EXT,
1027                                 ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1028         }
1029 }
1030
1031 /**
1032  * e1000_release_hw_control - release control of the h/w to f/w
1033  * @adapter: address of board private structure
1034  *
1035  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1036  * For ASF and Pass Through versions of f/w this means that the
1037  * driver is no longer loaded. For AMT version (only with 82573) i
1038  * of the f/w this means that the network i/f is closed.
1039  *
1040  **/
1041 static void e1000_release_hw_control(struct e1000_adapter *adapter)
1042 {
1043         struct e1000_hw *hw = &adapter->hw;
1044         u32 ctrl_ext;
1045         u32 swsm;
1046
1047         /* Let firmware taken over control of h/w */
1048         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1049                 swsm = er32(SWSM);
1050                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1051         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1052                 ctrl_ext = er32(CTRL_EXT);
1053                 ew32(CTRL_EXT,
1054                                 ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1055         }
1056 }
1057
1058 /**
1059  * @e1000_alloc_ring - allocate memory for a ring structure
1060  **/
1061 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1062                                 struct e1000_ring *ring)
1063 {
1064         struct pci_dev *pdev = adapter->pdev;
1065
1066         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1067                                         GFP_KERNEL);
1068         if (!ring->desc)
1069                 return -ENOMEM;
1070
1071         return 0;
1072 }
1073
1074 /**
1075  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1076  * @adapter: board private structure
1077  *
1078  * Return 0 on success, negative on failure
1079  **/
1080 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1081 {
1082         struct e1000_ring *tx_ring = adapter->tx_ring;
1083         int err = -ENOMEM, size;
1084
1085         size = sizeof(struct e1000_buffer) * tx_ring->count;
1086         tx_ring->buffer_info = vmalloc(size);
1087         if (!tx_ring->buffer_info)
1088                 goto err;
1089         memset(tx_ring->buffer_info, 0, size);
1090
1091         /* round up to nearest 4K */
1092         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1093         tx_ring->size = ALIGN(tx_ring->size, 4096);
1094
1095         err = e1000_alloc_ring_dma(adapter, tx_ring);
1096         if (err)
1097                 goto err;
1098
1099         tx_ring->next_to_use = 0;
1100         tx_ring->next_to_clean = 0;
1101         spin_lock_init(&adapter->tx_queue_lock);
1102
1103         return 0;
1104 err:
1105         vfree(tx_ring->buffer_info);
1106         ndev_err(adapter->netdev,
1107         "Unable to allocate memory for the transmit descriptor ring\n");
1108         return err;
1109 }
1110
1111 /**
1112  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1113  * @adapter: board private structure
1114  *
1115  * Returns 0 on success, negative on failure
1116  **/
1117 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1118 {
1119         struct e1000_ring *rx_ring = adapter->rx_ring;
1120         struct e1000_buffer *buffer_info;
1121         int i, size, desc_len, err = -ENOMEM;
1122
1123         size = sizeof(struct e1000_buffer) * rx_ring->count;
1124         rx_ring->buffer_info = vmalloc(size);
1125         if (!rx_ring->buffer_info)
1126                 goto err;
1127         memset(rx_ring->buffer_info, 0, size);
1128
1129         for (i = 0; i < rx_ring->count; i++) {
1130                 buffer_info = &rx_ring->buffer_info[i];
1131                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1132                                                 sizeof(struct e1000_ps_page),
1133                                                 GFP_KERNEL);
1134                 if (!buffer_info->ps_pages)
1135                         goto err_pages;
1136         }
1137
1138         desc_len = sizeof(union e1000_rx_desc_packet_split);
1139
1140         /* Round up to nearest 4K */
1141         rx_ring->size = rx_ring->count * desc_len;
1142         rx_ring->size = ALIGN(rx_ring->size, 4096);
1143
1144         err = e1000_alloc_ring_dma(adapter, rx_ring);
1145         if (err)
1146                 goto err_pages;
1147
1148         rx_ring->next_to_clean = 0;
1149         rx_ring->next_to_use = 0;
1150         rx_ring->rx_skb_top = NULL;
1151
1152         return 0;
1153
1154 err_pages:
1155         for (i = 0; i < rx_ring->count; i++) {
1156                 buffer_info = &rx_ring->buffer_info[i];
1157                 kfree(buffer_info->ps_pages);
1158         }
1159 err:
1160         vfree(rx_ring->buffer_info);
1161         ndev_err(adapter->netdev,
1162         "Unable to allocate memory for the transmit descriptor ring\n");
1163         return err;
1164 }
1165
1166 /**
1167  * e1000_clean_tx_ring - Free Tx Buffers
1168  * @adapter: board private structure
1169  **/
1170 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1171 {
1172         struct e1000_ring *tx_ring = adapter->tx_ring;
1173         struct e1000_buffer *buffer_info;
1174         unsigned long size;
1175         unsigned int i;
1176
1177         for (i = 0; i < tx_ring->count; i++) {
1178                 buffer_info = &tx_ring->buffer_info[i];
1179                 e1000_put_txbuf(adapter, buffer_info);
1180         }
1181
1182         size = sizeof(struct e1000_buffer) * tx_ring->count;
1183         memset(tx_ring->buffer_info, 0, size);
1184
1185         memset(tx_ring->desc, 0, tx_ring->size);
1186
1187         tx_ring->next_to_use = 0;
1188         tx_ring->next_to_clean = 0;
1189
1190         writel(0, adapter->hw.hw_addr + tx_ring->head);
1191         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1192 }
1193
1194 /**
1195  * e1000e_free_tx_resources - Free Tx Resources per Queue
1196  * @adapter: board private structure
1197  *
1198  * Free all transmit software resources
1199  **/
1200 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1201 {
1202         struct pci_dev *pdev = adapter->pdev;
1203         struct e1000_ring *tx_ring = adapter->tx_ring;
1204
1205         e1000_clean_tx_ring(adapter);
1206
1207         vfree(tx_ring->buffer_info);
1208         tx_ring->buffer_info = NULL;
1209
1210         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1211                           tx_ring->dma);
1212         tx_ring->desc = NULL;
1213 }
1214
1215 /**
1216  * e1000e_free_rx_resources - Free Rx Resources
1217  * @adapter: board private structure
1218  *
1219  * Free all receive software resources
1220  **/
1221
1222 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1223 {
1224         struct pci_dev *pdev = adapter->pdev;
1225         struct e1000_ring *rx_ring = adapter->rx_ring;
1226         int i;
1227
1228         e1000_clean_rx_ring(adapter);
1229
1230         for (i = 0; i < rx_ring->count; i++) {
1231                 kfree(rx_ring->buffer_info[i].ps_pages);
1232         }
1233
1234         vfree(rx_ring->buffer_info);
1235         rx_ring->buffer_info = NULL;
1236
1237         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1238                           rx_ring->dma);
1239         rx_ring->desc = NULL;
1240 }
1241
1242 /**
1243  * e1000_update_itr - update the dynamic ITR value based on statistics
1244  * @adapter: pointer to adapter
1245  * @itr_setting: current adapter->itr
1246  * @packets: the number of packets during this measurement interval
1247  * @bytes: the number of bytes during this measurement interval
1248  *
1249  *      Stores a new ITR value based on packets and byte
1250  *      counts during the last interrupt.  The advantage of per interrupt
1251  *      computation is faster updates and more accurate ITR for the current
1252  *      traffic pattern.  Constants in this function were computed
1253  *      based on theoretical maximum wire speed and thresholds were set based
1254  *      on testing data as well as attempting to minimize response time
1255  *      while increasing bulk throughput.
1256  *      this functionality is controlled by the InterruptThrottleRate module
1257  *      parameter (see e1000_param.c)
1258  **/
1259 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1260                                      u16 itr_setting, int packets,
1261                                      int bytes)
1262 {
1263         unsigned int retval = itr_setting;
1264
1265         if (packets == 0)
1266                 goto update_itr_done;
1267
1268         switch (itr_setting) {
1269         case lowest_latency:
1270                 /* handle TSO and jumbo frames */
1271                 if (bytes/packets > 8000)
1272                         retval = bulk_latency;
1273                 else if ((packets < 5) && (bytes > 512)) {
1274                         retval = low_latency;
1275                 }
1276                 break;
1277         case low_latency:  /* 50 usec aka 20000 ints/s */
1278                 if (bytes > 10000) {
1279                         /* this if handles the TSO accounting */
1280                         if (bytes/packets > 8000) {
1281                                 retval = bulk_latency;
1282                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1283                                 retval = bulk_latency;
1284                         } else if ((packets > 35)) {
1285                                 retval = lowest_latency;
1286                         }
1287                 } else if (bytes/packets > 2000) {
1288                         retval = bulk_latency;
1289                 } else if (packets <= 2 && bytes < 512) {
1290                         retval = lowest_latency;
1291                 }
1292                 break;
1293         case bulk_latency: /* 250 usec aka 4000 ints/s */
1294                 if (bytes > 25000) {
1295                         if (packets > 35) {
1296                                 retval = low_latency;
1297                         }
1298                 } else if (bytes < 6000) {
1299                         retval = low_latency;
1300                 }
1301                 break;
1302         }
1303
1304 update_itr_done:
1305         return retval;
1306 }
1307
1308 static void e1000_set_itr(struct e1000_adapter *adapter)
1309 {
1310         struct e1000_hw *hw = &adapter->hw;
1311         u16 current_itr;
1312         u32 new_itr = adapter->itr;
1313
1314         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1315         if (adapter->link_speed != SPEED_1000) {
1316                 current_itr = 0;
1317                 new_itr = 4000;
1318                 goto set_itr_now;
1319         }
1320
1321         adapter->tx_itr = e1000_update_itr(adapter,
1322                                     adapter->tx_itr,
1323                                     adapter->total_tx_packets,
1324                                     adapter->total_tx_bytes);
1325         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1326         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1327                 adapter->tx_itr = low_latency;
1328
1329         adapter->rx_itr = e1000_update_itr(adapter,
1330                                     adapter->rx_itr,
1331                                     adapter->total_rx_packets,
1332                                     adapter->total_rx_bytes);
1333         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1334         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1335                 adapter->rx_itr = low_latency;
1336
1337         current_itr = max(adapter->rx_itr, adapter->tx_itr);
1338
1339         switch (current_itr) {
1340         /* counts and packets in update_itr are dependent on these numbers */
1341         case lowest_latency:
1342                 new_itr = 70000;
1343                 break;
1344         case low_latency:
1345                 new_itr = 20000; /* aka hwitr = ~200 */
1346                 break;
1347         case bulk_latency:
1348                 new_itr = 4000;
1349                 break;
1350         default:
1351                 break;
1352         }
1353
1354 set_itr_now:
1355         if (new_itr != adapter->itr) {
1356                 /* this attempts to bias the interrupt rate towards Bulk
1357                  * by adding intermediate steps when interrupt rate is
1358                  * increasing */
1359                 new_itr = new_itr > adapter->itr ?
1360                              min(adapter->itr + (new_itr >> 2), new_itr) :
1361                              new_itr;
1362                 adapter->itr = new_itr;
1363                 ew32(ITR, 1000000000 / (new_itr * 256));
1364         }
1365 }
1366
1367 /**
1368  * e1000_clean - NAPI Rx polling callback
1369  * @adapter: board private structure
1370  * @budget: amount of packets driver is allowed to process this poll
1371  **/
1372 static int e1000_clean(struct napi_struct *napi, int budget)
1373 {
1374         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
1375         struct net_device *poll_dev = adapter->netdev;
1376         int tx_cleaned = 0, work_done = 0;
1377
1378         /* Must NOT use netdev_priv macro here. */
1379         adapter = poll_dev->priv;
1380
1381         /* e1000_clean is called per-cpu.  This lock protects
1382          * tx_ring from being cleaned by multiple cpus
1383          * simultaneously.  A failure obtaining the lock means
1384          * tx_ring is currently being cleaned anyway. */
1385         if (spin_trylock(&adapter->tx_queue_lock)) {
1386                 tx_cleaned = e1000_clean_tx_irq(adapter);
1387                 spin_unlock(&adapter->tx_queue_lock);
1388         }
1389
1390         adapter->clean_rx(adapter, &work_done, budget);
1391
1392         if (tx_cleaned)
1393                 work_done = budget;
1394
1395         /* If budget not fully consumed, exit the polling mode */
1396         if (work_done < budget) {
1397                 if (adapter->itr_setting & 3)
1398                         e1000_set_itr(adapter);
1399                 netif_rx_complete(poll_dev, napi);
1400                 e1000_irq_enable(adapter);
1401         }
1402
1403         return work_done;
1404 }
1405
1406 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1407 {
1408         struct e1000_adapter *adapter = netdev_priv(netdev);
1409         struct e1000_hw *hw = &adapter->hw;
1410         u32 vfta, index;
1411
1412         /* don't update vlan cookie if already programmed */
1413         if ((adapter->hw.mng_cookie.status &
1414              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1415             (vid == adapter->mng_vlan_id))
1416                 return;
1417         /* add VID to filter table */
1418         index = (vid >> 5) & 0x7F;
1419         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
1420         vfta |= (1 << (vid & 0x1F));
1421         e1000e_write_vfta(hw, index, vfta);
1422 }
1423
1424 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1425 {
1426         struct e1000_adapter *adapter = netdev_priv(netdev);
1427         struct e1000_hw *hw = &adapter->hw;
1428         u32 vfta, index;
1429
1430         e1000_irq_disable(adapter);
1431         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1432         e1000_irq_enable(adapter);
1433
1434         if ((adapter->hw.mng_cookie.status &
1435              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
1436             (vid == adapter->mng_vlan_id)) {
1437                 /* release control to f/w */
1438                 e1000_release_hw_control(adapter);
1439                 return;
1440         }
1441
1442         /* remove VID from filter table */
1443         index = (vid >> 5) & 0x7F;
1444         vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
1445         vfta &= ~(1 << (vid & 0x1F));
1446         e1000e_write_vfta(hw, index, vfta);
1447 }
1448
1449 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
1450 {
1451         struct net_device *netdev = adapter->netdev;
1452         u16 vid = adapter->hw.mng_cookie.vlan_id;
1453         u16 old_vid = adapter->mng_vlan_id;
1454
1455         if (!adapter->vlgrp)
1456                 return;
1457
1458         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
1459                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1460                 if (adapter->hw.mng_cookie.status &
1461                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
1462                         e1000_vlan_rx_add_vid(netdev, vid);
1463                         adapter->mng_vlan_id = vid;
1464                 }
1465
1466                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
1467                                 (vid != old_vid) &&
1468                     !vlan_group_get_device(adapter->vlgrp, old_vid))
1469                         e1000_vlan_rx_kill_vid(netdev, old_vid);
1470         } else {
1471                 adapter->mng_vlan_id = vid;
1472         }
1473 }
1474
1475
1476 static void e1000_vlan_rx_register(struct net_device *netdev,
1477                                    struct vlan_group *grp)
1478 {
1479         struct e1000_adapter *adapter = netdev_priv(netdev);
1480         struct e1000_hw *hw = &adapter->hw;
1481         u32 ctrl, rctl;
1482
1483         e1000_irq_disable(adapter);
1484         adapter->vlgrp = grp;
1485
1486         if (grp) {
1487                 /* enable VLAN tag insert/strip */
1488                 ctrl = er32(CTRL);
1489                 ctrl |= E1000_CTRL_VME;
1490                 ew32(CTRL, ctrl);
1491
1492                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
1493                         /* enable VLAN receive filtering */
1494                         rctl = er32(RCTL);
1495                         rctl |= E1000_RCTL_VFE;
1496                         rctl &= ~E1000_RCTL_CFIEN;
1497                         ew32(RCTL, rctl);
1498                         e1000_update_mng_vlan(adapter);
1499                 }
1500         } else {
1501                 /* disable VLAN tag insert/strip */
1502                 ctrl = er32(CTRL);
1503                 ctrl &= ~E1000_CTRL_VME;
1504                 ew32(CTRL, ctrl);
1505
1506                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
1507                         /* disable VLAN filtering */
1508                         rctl = er32(RCTL);
1509                         rctl &= ~E1000_RCTL_VFE;
1510                         ew32(RCTL, rctl);
1511                         if (adapter->mng_vlan_id !=
1512                             (u16)E1000_MNG_VLAN_NONE) {
1513                                 e1000_vlan_rx_kill_vid(netdev,
1514                                                        adapter->mng_vlan_id);
1515                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
1516                         }
1517                 }
1518         }
1519
1520         e1000_irq_enable(adapter);
1521 }
1522
1523 static void e1000_restore_vlan(struct e1000_adapter *adapter)
1524 {
1525         u16 vid;
1526
1527         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1528
1529         if (!adapter->vlgrp)
1530                 return;
1531
1532         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1533                 if (!vlan_group_get_device(adapter->vlgrp, vid))
1534                         continue;
1535                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
1536         }
1537 }
1538
1539 static void e1000_init_manageability(struct e1000_adapter *adapter)
1540 {
1541         struct e1000_hw *hw = &adapter->hw;
1542         u32 manc, manc2h;
1543
1544         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
1545                 return;
1546
1547         manc = er32(MANC);
1548
1549         /* enable receiving management packets to the host. this will probably
1550          * generate destination unreachable messages from the host OS, but
1551          * the packets will be handled on SMBUS */
1552         manc |= E1000_MANC_EN_MNG2HOST;
1553         manc2h = er32(MANC2H);
1554 #define E1000_MNG2HOST_PORT_623 (1 << 5)
1555 #define E1000_MNG2HOST_PORT_664 (1 << 6)
1556         manc2h |= E1000_MNG2HOST_PORT_623;
1557         manc2h |= E1000_MNG2HOST_PORT_664;
1558         ew32(MANC2H, manc2h);
1559         ew32(MANC, manc);
1560 }
1561
1562 /**
1563  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
1564  * @adapter: board private structure
1565  *
1566  * Configure the Tx unit of the MAC after a reset.
1567  **/
1568 static void e1000_configure_tx(struct e1000_adapter *adapter)
1569 {
1570         struct e1000_hw *hw = &adapter->hw;
1571         struct e1000_ring *tx_ring = adapter->tx_ring;
1572         u64 tdba;
1573         u32 tdlen, tctl, tipg, tarc;
1574         u32 ipgr1, ipgr2;
1575
1576         /* Setup the HW Tx Head and Tail descriptor pointers */
1577         tdba = tx_ring->dma;
1578         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
1579         ew32(TDBAL, (tdba & DMA_32BIT_MASK));
1580         ew32(TDBAH, (tdba >> 32));
1581         ew32(TDLEN, tdlen);
1582         ew32(TDH, 0);
1583         ew32(TDT, 0);
1584         tx_ring->head = E1000_TDH;
1585         tx_ring->tail = E1000_TDT;
1586
1587         /* Set the default values for the Tx Inter Packet Gap timer */
1588         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
1589         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
1590         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
1591
1592         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
1593                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
1594
1595         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
1596         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
1597         ew32(TIPG, tipg);
1598
1599         /* Set the Tx Interrupt Delay register */
1600         ew32(TIDV, adapter->tx_int_delay);
1601         /* tx irq moderation */
1602         ew32(TADV, adapter->tx_abs_int_delay);
1603
1604         /* Program the Transmit Control Register */
1605         tctl = er32(TCTL);
1606         tctl &= ~E1000_TCTL_CT;
1607         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
1608                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
1609
1610         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
1611                 tarc = er32(TARC0);
1612                 /* set the speed mode bit, we'll clear it if we're not at
1613                  * gigabit link later */
1614 #define SPEED_MODE_BIT (1 << 21)
1615                 tarc |= SPEED_MODE_BIT;
1616                 ew32(TARC0, tarc);
1617         }
1618
1619         /* errata: program both queues to unweighted RR */
1620         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
1621                 tarc = er32(TARC0);
1622                 tarc |= 1;
1623                 ew32(TARC0, tarc);
1624                 tarc = er32(TARC1);
1625                 tarc |= 1;
1626                 ew32(TARC1, tarc);
1627         }
1628
1629         e1000e_config_collision_dist(hw);
1630
1631         /* Setup Transmit Descriptor Settings for eop descriptor */
1632         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
1633
1634         /* only set IDE if we are delaying interrupts using the timers */
1635         if (adapter->tx_int_delay)
1636                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
1637
1638         /* enable Report Status bit */
1639         adapter->txd_cmd |= E1000_TXD_CMD_RS;
1640
1641         ew32(TCTL, tctl);
1642
1643         adapter->tx_queue_len = adapter->netdev->tx_queue_len;
1644 }
1645
1646 /**
1647  * e1000_setup_rctl - configure the receive control registers
1648  * @adapter: Board private structure
1649  **/
1650 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1651                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1652 static void e1000_setup_rctl(struct e1000_adapter *adapter)
1653 {
1654         struct e1000_hw *hw = &adapter->hw;
1655         u32 rctl, rfctl;
1656         u32 psrctl = 0;
1657         u32 pages = 0;
1658
1659         /* Program MC offset vector base */
1660         rctl = er32(RCTL);
1661         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
1662         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
1663                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
1664                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
1665
1666         /* Do not Store bad packets */
1667         rctl &= ~E1000_RCTL_SBP;
1668
1669         /* Enable Long Packet receive */
1670         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1671                 rctl &= ~E1000_RCTL_LPE;
1672         else
1673                 rctl |= E1000_RCTL_LPE;
1674
1675         /* Enable hardware CRC frame stripping */
1676         rctl |= E1000_RCTL_SECRC;
1677
1678         /* Setup buffer sizes */
1679         rctl &= ~E1000_RCTL_SZ_4096;
1680         rctl |= E1000_RCTL_BSEX;
1681         switch (adapter->rx_buffer_len) {
1682         case 256:
1683                 rctl |= E1000_RCTL_SZ_256;
1684                 rctl &= ~E1000_RCTL_BSEX;
1685                 break;
1686         case 512:
1687                 rctl |= E1000_RCTL_SZ_512;
1688                 rctl &= ~E1000_RCTL_BSEX;
1689                 break;
1690         case 1024:
1691                 rctl |= E1000_RCTL_SZ_1024;
1692                 rctl &= ~E1000_RCTL_BSEX;
1693                 break;
1694         case 2048:
1695         default:
1696                 rctl |= E1000_RCTL_SZ_2048;
1697                 rctl &= ~E1000_RCTL_BSEX;
1698                 break;
1699         case 4096:
1700                 rctl |= E1000_RCTL_SZ_4096;
1701                 break;
1702         case 8192:
1703                 rctl |= E1000_RCTL_SZ_8192;
1704                 break;
1705         case 16384:
1706                 rctl |= E1000_RCTL_SZ_16384;
1707                 break;
1708         }
1709
1710         /*
1711          * 82571 and greater support packet-split where the protocol
1712          * header is placed in skb->data and the packet data is
1713          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
1714          * In the case of a non-split, skb->data is linearly filled,
1715          * followed by the page buffers.  Therefore, skb->data is
1716          * sized to hold the largest protocol header.
1717          *
1718          * allocations using alloc_page take too long for regular MTU
1719          * so only enable packet split for jumbo frames
1720          *
1721          * Using pages when the page size is greater than 16k wastes
1722          * a lot of memory, since we allocate 3 pages at all times
1723          * per packet.
1724          */
1725         adapter->rx_ps_pages = 0;
1726         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1727         if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
1728                 adapter->rx_ps_pages = pages;
1729
1730         if (adapter->rx_ps_pages) {
1731                 /* Configure extra packet-split registers */
1732                 rfctl = er32(RFCTL);
1733                 rfctl |= E1000_RFCTL_EXTEN;
1734                 /* disable packet split support for IPv6 extension headers,
1735                  * because some malformed IPv6 headers can hang the RX */
1736                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
1737                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
1738
1739                 ew32(RFCTL, rfctl);
1740
1741                 /* Enable Packet split descriptors */
1742                 rctl |= E1000_RCTL_DTYP_PS;
1743
1744                 psrctl |= adapter->rx_ps_bsize0 >>
1745                         E1000_PSRCTL_BSIZE0_SHIFT;
1746
1747                 switch (adapter->rx_ps_pages) {
1748                 case 3:
1749                         psrctl |= PAGE_SIZE <<
1750                                 E1000_PSRCTL_BSIZE3_SHIFT;
1751                 case 2:
1752                         psrctl |= PAGE_SIZE <<
1753                                 E1000_PSRCTL_BSIZE2_SHIFT;
1754                 case 1:
1755                         psrctl |= PAGE_SIZE >>
1756                                 E1000_PSRCTL_BSIZE1_SHIFT;
1757                         break;
1758                 }
1759
1760                 ew32(PSRCTL, psrctl);
1761         }
1762
1763         ew32(RCTL, rctl);
1764 }
1765
1766 /**
1767  * e1000_configure_rx - Configure Receive Unit after Reset
1768  * @adapter: board private structure
1769  *
1770  * Configure the Rx unit of the MAC after a reset.
1771  **/
1772 static void e1000_configure_rx(struct e1000_adapter *adapter)
1773 {
1774         struct e1000_hw *hw = &adapter->hw;
1775         struct e1000_ring *rx_ring = adapter->rx_ring;
1776         u64 rdba;
1777         u32 rdlen, rctl, rxcsum, ctrl_ext;
1778
1779         if (adapter->rx_ps_pages) {
1780                 /* this is a 32 byte descriptor */
1781                 rdlen = rx_ring->count *
1782                         sizeof(union e1000_rx_desc_packet_split);
1783                 adapter->clean_rx = e1000_clean_rx_irq_ps;
1784                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
1785         } else {
1786                 rdlen = rx_ring->count *
1787                         sizeof(struct e1000_rx_desc);
1788                 adapter->clean_rx = e1000_clean_rx_irq;
1789                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
1790         }
1791
1792         /* disable receives while setting up the descriptors */
1793         rctl = er32(RCTL);
1794         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1795         e1e_flush();
1796         msleep(10);
1797
1798         /* set the Receive Delay Timer Register */
1799         ew32(RDTR, adapter->rx_int_delay);
1800
1801         /* irq moderation */
1802         ew32(RADV, adapter->rx_abs_int_delay);
1803         if (adapter->itr_setting != 0)
1804                 ew32(ITR,
1805                         1000000000 / (adapter->itr * 256));
1806
1807         ctrl_ext = er32(CTRL_EXT);
1808         /* Reset delay timers after every interrupt */
1809         ctrl_ext |= E1000_CTRL_EXT_INT_TIMER_CLR;
1810         /* Auto-Mask interrupts upon ICR access */
1811         ctrl_ext |= E1000_CTRL_EXT_IAME;
1812         ew32(IAM, 0xffffffff);
1813         ew32(CTRL_EXT, ctrl_ext);
1814         e1e_flush();
1815
1816         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1817          * the Base and Length of the Rx Descriptor Ring */
1818         rdba = rx_ring->dma;
1819         ew32(RDBAL, (rdba & DMA_32BIT_MASK));
1820         ew32(RDBAH, (rdba >> 32));
1821         ew32(RDLEN, rdlen);
1822         ew32(RDH, 0);
1823         ew32(RDT, 0);
1824         rx_ring->head = E1000_RDH;
1825         rx_ring->tail = E1000_RDT;
1826
1827         /* Enable Receive Checksum Offload for TCP and UDP */
1828         rxcsum = er32(RXCSUM);
1829         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
1830                 rxcsum |= E1000_RXCSUM_TUOFL;
1831
1832                 /* IPv4 payload checksum for UDP fragments must be
1833                  * used in conjunction with packet-split. */
1834                 if (adapter->rx_ps_pages)
1835                         rxcsum |= E1000_RXCSUM_IPPCSE;
1836         } else {
1837                 rxcsum &= ~E1000_RXCSUM_TUOFL;
1838                 /* no need to clear IPPCSE as it defaults to 0 */
1839         }
1840         ew32(RXCSUM, rxcsum);
1841
1842         /* Enable early receives on supported devices, only takes effect when
1843          * packet size is equal or larger than the specified value (in 8 byte
1844          * units), e.g. using jumbo frames when setting to E1000_ERT_2048 */
1845         if ((adapter->flags & FLAG_HAS_ERT) &&
1846             (adapter->netdev->mtu > ETH_DATA_LEN))
1847                 ew32(ERT, E1000_ERT_2048);
1848
1849         /* Enable Receives */
1850         ew32(RCTL, rctl);
1851 }
1852
1853 /**
1854  *  e1000_mc_addr_list_update - Update Multicast addresses
1855  *  @hw: pointer to the HW structure
1856  *  @mc_addr_list: array of multicast addresses to program
1857  *  @mc_addr_count: number of multicast addresses to program
1858  *  @rar_used_count: the first RAR register free to program
1859  *  @rar_count: total number of supported Receive Address Registers
1860  *
1861  *  Updates the Receive Address Registers and Multicast Table Array.
1862  *  The caller must have a packed mc_addr_list of multicast addresses.
1863  *  The parameter rar_count will usually be hw->mac.rar_entry_count
1864  *  unless there are workarounds that change this.  Currently no func pointer
1865  *  exists and all implementations are handled in the generic version of this
1866  *  function.
1867  **/
1868 static void e1000_mc_addr_list_update(struct e1000_hw *hw, u8 *mc_addr_list,
1869                                u32 mc_addr_count, u32 rar_used_count,
1870                                u32 rar_count)
1871 {
1872         hw->mac.ops.mc_addr_list_update(hw, mc_addr_list, mc_addr_count,
1873                                         rar_used_count, rar_count);
1874 }
1875
1876 /**
1877  * e1000_set_multi - Multicast and Promiscuous mode set
1878  * @netdev: network interface device structure
1879  *
1880  * The set_multi entry point is called whenever the multicast address
1881  * list or the network interface flags are updated.  This routine is
1882  * responsible for configuring the hardware for proper multicast,
1883  * promiscuous mode, and all-multi behavior.
1884  **/
1885 static void e1000_set_multi(struct net_device *netdev)
1886 {
1887         struct e1000_adapter *adapter = netdev_priv(netdev);
1888         struct e1000_hw *hw = &adapter->hw;
1889         struct e1000_mac_info *mac = &hw->mac;
1890         struct dev_mc_list *mc_ptr;
1891         u8  *mta_list;
1892         u32 rctl;
1893         int i;
1894
1895         /* Check for Promiscuous and All Multicast modes */
1896
1897         rctl = er32(RCTL);
1898
1899         if (netdev->flags & IFF_PROMISC) {
1900                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
1901         } else if (netdev->flags & IFF_ALLMULTI) {
1902                 rctl |= E1000_RCTL_MPE;
1903                 rctl &= ~E1000_RCTL_UPE;
1904         } else {
1905                 rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
1906         }
1907
1908         ew32(RCTL, rctl);
1909
1910         if (netdev->mc_count) {
1911                 mta_list = kmalloc(netdev->mc_count * 6, GFP_ATOMIC);
1912                 if (!mta_list)
1913                         return;
1914
1915                 /* prepare a packed array of only addresses. */
1916                 mc_ptr = netdev->mc_list;
1917
1918                 for (i = 0; i < netdev->mc_count; i++) {
1919                         if (!mc_ptr)
1920                                 break;
1921                         memcpy(mta_list + (i*ETH_ALEN), mc_ptr->dmi_addr,
1922                                ETH_ALEN);
1923                         mc_ptr = mc_ptr->next;
1924                 }
1925
1926                 e1000_mc_addr_list_update(hw, mta_list, i, 1,
1927                                           mac->rar_entry_count);
1928                 kfree(mta_list);
1929         } else {
1930                 /*
1931                  * if we're called from probe, we might not have
1932                  * anything to do here, so clear out the list
1933                  */
1934                 e1000_mc_addr_list_update(hw, NULL, 0, 1,
1935                                           mac->rar_entry_count);
1936         }
1937 }
1938
1939 /**
1940  * e1000_configure - configure the hardware for RX and TX
1941  * @adapter: private board structure
1942  **/
1943 static void e1000_configure(struct e1000_adapter *adapter)
1944 {
1945         e1000_set_multi(adapter->netdev);
1946
1947         e1000_restore_vlan(adapter);
1948         e1000_init_manageability(adapter);
1949
1950         e1000_configure_tx(adapter);
1951         e1000_setup_rctl(adapter);
1952         e1000_configure_rx(adapter);
1953         adapter->alloc_rx_buf(adapter,
1954                               e1000_desc_unused(adapter->rx_ring));
1955 }
1956
1957 /**
1958  * e1000e_power_up_phy - restore link in case the phy was powered down
1959  * @adapter: address of board private structure
1960  *
1961  * The phy may be powered down to save power and turn off link when the
1962  * driver is unloaded and wake on lan is not enabled (among others)
1963  * *** this routine MUST be followed by a call to e1000e_reset ***
1964  **/
1965 void e1000e_power_up_phy(struct e1000_adapter *adapter)
1966 {
1967         u16 mii_reg = 0;
1968
1969         /* Just clear the power down bit to wake the phy back up */
1970         if (adapter->hw.media_type == e1000_media_type_copper) {
1971                 /* according to the manual, the phy will retain its
1972                  * settings across a power-down/up cycle */
1973                 e1e_rphy(&adapter->hw, PHY_CONTROL, &mii_reg);
1974                 mii_reg &= ~MII_CR_POWER_DOWN;
1975                 e1e_wphy(&adapter->hw, PHY_CONTROL, mii_reg);
1976         }
1977
1978         adapter->hw.mac.ops.setup_link(&adapter->hw);
1979 }
1980
1981 /**
1982  * e1000_power_down_phy - Power down the PHY
1983  *
1984  * Power down the PHY so no link is implied when interface is down
1985  * The PHY cannot be powered down is management or WoL is active
1986  */
1987 static void e1000_power_down_phy(struct e1000_adapter *adapter)
1988 {
1989         struct e1000_hw *hw = &adapter->hw;
1990         u16 mii_reg;
1991
1992         /* WoL is enabled */
1993         if (adapter->wol)
1994                 return;
1995
1996         /* non-copper PHY? */
1997         if (adapter->hw.media_type != e1000_media_type_copper)
1998                 return;
1999
2000         /* reset is blocked because of a SoL/IDER session */
2001         if (e1000e_check_mng_mode(hw) ||
2002             e1000_check_reset_block(hw))
2003                 return;
2004
2005         /* manageability (AMT) is enabled */
2006         if (er32(MANC) & E1000_MANC_SMBUS_EN)
2007                 return;
2008
2009         /* power down the PHY */
2010         e1e_rphy(hw, PHY_CONTROL, &mii_reg);
2011         mii_reg |= MII_CR_POWER_DOWN;
2012         e1e_wphy(hw, PHY_CONTROL, mii_reg);
2013         mdelay(1);
2014 }
2015
2016 /**
2017  * e1000e_reset - bring the hardware into a known good state
2018  *
2019  * This function boots the hardware and enables some settings that
2020  * require a configuration cycle of the hardware - those cannot be
2021  * set/changed during runtime. After reset the device needs to be
2022  * properly configured for rx, tx etc.
2023  */
2024 void e1000e_reset(struct e1000_adapter *adapter)
2025 {
2026         struct e1000_mac_info *mac = &adapter->hw.mac;
2027         struct e1000_hw *hw = &adapter->hw;
2028         u32 tx_space, min_tx_space, min_rx_space;
2029         u32 pba;
2030         u16 hwm;
2031
2032         ew32(PBA, adapter->pba);
2033
2034         if (mac->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN ) {
2035                 /* To maintain wire speed transmits, the Tx FIFO should be
2036                  * large enough to accommodate two full transmit packets,
2037                  * rounded up to the next 1KB and expressed in KB.  Likewise,
2038                  * the Rx FIFO should be large enough to accommodate at least
2039                  * one full receive packet and is similarly rounded up and
2040                  * expressed in KB. */
2041                 pba = er32(PBA);
2042                 /* upper 16 bits has Tx packet buffer allocation size in KB */
2043                 tx_space = pba >> 16;
2044                 /* lower 16 bits has Rx packet buffer allocation size in KB */
2045                 pba &= 0xffff;
2046                 /* the tx fifo also stores 16 bytes of information about the tx
2047                  * but don't include ethernet FCS because hardware appends it */
2048                 min_tx_space = (mac->max_frame_size +
2049                                 sizeof(struct e1000_tx_desc) -
2050                                 ETH_FCS_LEN) * 2;
2051                 min_tx_space = ALIGN(min_tx_space, 1024);
2052                 min_tx_space >>= 10;
2053                 /* software strips receive CRC, so leave room for it */
2054                 min_rx_space = mac->max_frame_size;
2055                 min_rx_space = ALIGN(min_rx_space, 1024);
2056                 min_rx_space >>= 10;
2057
2058                 /* If current Tx allocation is less than the min Tx FIFO size,
2059                  * and the min Tx FIFO size is less than the current Rx FIFO
2060                  * allocation, take space away from current Rx allocation */
2061                 if ((tx_space < min_tx_space) &&
2062                     ((min_tx_space - tx_space) < pba)) {
2063                         pba -= min_tx_space - tx_space;
2064
2065                         /* if short on rx space, rx wins and must trump tx
2066                          * adjustment or use Early Receive if available */
2067                         if ((pba < min_rx_space) &&
2068                             (!(adapter->flags & FLAG_HAS_ERT)))
2069                                 /* ERT enabled in e1000_configure_rx */
2070                                 pba = min_rx_space;
2071                 }
2072
2073                 ew32(PBA, pba);
2074         }
2075
2076
2077         /* flow control settings */
2078         /* The high water mark must be low enough to fit one full frame
2079          * (or the size used for early receive) above it in the Rx FIFO.
2080          * Set it to the lower of:
2081          * - 90% of the Rx FIFO size, and
2082          * - the full Rx FIFO size minus the early receive size (for parts
2083          *   with ERT support assuming ERT set to E1000_ERT_2048), or
2084          * - the full Rx FIFO size minus one full frame */
2085         if (adapter->flags & FLAG_HAS_ERT)
2086                 hwm = min(((adapter->pba << 10) * 9 / 10),
2087                           ((adapter->pba << 10) - (E1000_ERT_2048 << 3)));
2088         else
2089                 hwm = min(((adapter->pba << 10) * 9 / 10),
2090                           ((adapter->pba << 10) - mac->max_frame_size));
2091
2092         mac->fc_high_water = hwm & 0xFFF8; /* 8-byte granularity */
2093         mac->fc_low_water = mac->fc_high_water - 8;
2094
2095         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
2096                 mac->fc_pause_time = 0xFFFF;
2097         else
2098                 mac->fc_pause_time = E1000_FC_PAUSE_TIME;
2099         mac->fc = mac->original_fc;
2100
2101         /* Allow time for pending master requests to run */
2102         mac->ops.reset_hw(hw);
2103         ew32(WUC, 0);
2104
2105         if (mac->ops.init_hw(hw))
2106                 ndev_err(adapter->netdev, "Hardware Error\n");
2107
2108         e1000_update_mng_vlan(adapter);
2109
2110         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2111         ew32(VET, ETH_P_8021Q);
2112
2113         e1000e_reset_adaptive(hw);
2114         e1000_get_phy_info(hw);
2115
2116         if (!(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2117                 u16 phy_data = 0;
2118                 /* speed up time to link by disabling smart power down, ignore
2119                  * the return value of this function because there is nothing
2120                  * different we would do if it failed */
2121                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2122                 phy_data &= ~IGP02E1000_PM_SPD;
2123                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2124         }
2125 }
2126
2127 int e1000e_up(struct e1000_adapter *adapter)
2128 {
2129         struct e1000_hw *hw = &adapter->hw;
2130
2131         /* hardware has been reset, we need to reload some things */
2132         e1000_configure(adapter);
2133
2134         clear_bit(__E1000_DOWN, &adapter->state);
2135
2136         napi_enable(&adapter->napi);
2137         e1000_irq_enable(adapter);
2138
2139         /* fire a link change interrupt to start the watchdog */
2140         ew32(ICS, E1000_ICS_LSC);
2141         return 0;
2142 }
2143
2144 void e1000e_down(struct e1000_adapter *adapter)
2145 {
2146         struct net_device *netdev = adapter->netdev;
2147         struct e1000_hw *hw = &adapter->hw;
2148         u32 tctl, rctl;
2149
2150         /* signal that we're down so the interrupt handler does not
2151          * reschedule our watchdog timer */
2152         set_bit(__E1000_DOWN, &adapter->state);
2153
2154         /* disable receives in the hardware */
2155         rctl = er32(RCTL);
2156         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2157         /* flush and sleep below */
2158
2159         netif_stop_queue(netdev);
2160
2161         /* disable transmits in the hardware */
2162         tctl = er32(TCTL);
2163         tctl &= ~E1000_TCTL_EN;
2164         ew32(TCTL, tctl);
2165         /* flush both disables and wait for them to finish */
2166         e1e_flush();
2167         msleep(10);
2168
2169         napi_disable(&adapter->napi);
2170         atomic_set(&adapter->irq_sem, 0);
2171         e1000_irq_disable(adapter);
2172
2173         del_timer_sync(&adapter->watchdog_timer);
2174         del_timer_sync(&adapter->phy_info_timer);
2175
2176         netdev->tx_queue_len = adapter->tx_queue_len;
2177         netif_carrier_off(netdev);
2178         adapter->link_speed = 0;
2179         adapter->link_duplex = 0;
2180
2181         e1000e_reset(adapter);
2182         e1000_clean_tx_ring(adapter);
2183         e1000_clean_rx_ring(adapter);
2184
2185         /*
2186          * TODO: for power management, we could drop the link and
2187          * pci_disable_device here.
2188          */
2189 }
2190
2191 void e1000e_reinit_locked(struct e1000_adapter *adapter)
2192 {
2193         might_sleep();
2194         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2195                 msleep(1);
2196         e1000e_down(adapter);
2197         e1000e_up(adapter);
2198         clear_bit(__E1000_RESETTING, &adapter->state);
2199 }
2200
2201 /**
2202  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2203  * @adapter: board private structure to initialize
2204  *
2205  * e1000_sw_init initializes the Adapter private data structure.
2206  * Fields are initialized based on PCI device information and
2207  * OS network device settings (MTU size).
2208  **/
2209 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2210 {
2211         struct e1000_hw *hw = &adapter->hw;
2212         struct net_device *netdev = adapter->netdev;
2213
2214         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2215         adapter->rx_ps_bsize0 = 128;
2216         hw->mac.max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2217         hw->mac.min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2218
2219         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2220         if (!adapter->tx_ring)
2221                 goto err;
2222
2223         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2224         if (!adapter->rx_ring)
2225                 goto err;
2226
2227         spin_lock_init(&adapter->tx_queue_lock);
2228
2229         /* Explicitly disable IRQ since the NIC can be in any state. */
2230         atomic_set(&adapter->irq_sem, 0);
2231         e1000_irq_disable(adapter);
2232
2233         spin_lock_init(&adapter->stats_lock);
2234
2235         set_bit(__E1000_DOWN, &adapter->state);
2236         return 0;
2237
2238 err:
2239         ndev_err(netdev, "Unable to allocate memory for queues\n");
2240         kfree(adapter->rx_ring);
2241         kfree(adapter->tx_ring);
2242         return -ENOMEM;
2243 }
2244
2245 /**
2246  * e1000_open - Called when a network interface is made active
2247  * @netdev: network interface device structure
2248  *
2249  * Returns 0 on success, negative value on failure
2250  *
2251  * The open entry point is called when a network interface is made
2252  * active by the system (IFF_UP).  At this point all resources needed
2253  * for transmit and receive operations are allocated, the interrupt
2254  * handler is registered with the OS, the watchdog timer is started,
2255  * and the stack is notified that the interface is ready.
2256  **/
2257 static int e1000_open(struct net_device *netdev)
2258 {
2259         struct e1000_adapter *adapter = netdev_priv(netdev);
2260         struct e1000_hw *hw = &adapter->hw;
2261         int err;
2262
2263         /* disallow open during test */
2264         if (test_bit(__E1000_TESTING, &adapter->state))
2265                 return -EBUSY;
2266
2267         /* allocate transmit descriptors */
2268         err = e1000e_setup_tx_resources(adapter);
2269         if (err)
2270                 goto err_setup_tx;
2271
2272         /* allocate receive descriptors */
2273         err = e1000e_setup_rx_resources(adapter);
2274         if (err)
2275                 goto err_setup_rx;
2276
2277         e1000e_power_up_phy(adapter);
2278
2279         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2280         if ((adapter->hw.mng_cookie.status &
2281              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
2282                 e1000_update_mng_vlan(adapter);
2283
2284         /* If AMT is enabled, let the firmware know that the network
2285          * interface is now open */
2286         if ((adapter->flags & FLAG_HAS_AMT) &&
2287             e1000e_check_mng_mode(&adapter->hw))
2288                 e1000_get_hw_control(adapter);
2289
2290         /* before we allocate an interrupt, we must be ready to handle it.
2291          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
2292          * as soon as we call pci_request_irq, so we have to setup our
2293          * clean_rx handler before we do so.  */
2294         e1000_configure(adapter);
2295
2296         err = e1000_request_irq(adapter);
2297         if (err)
2298                 goto err_req_irq;
2299
2300         /* From here on the code is the same as e1000e_up() */
2301         clear_bit(__E1000_DOWN, &adapter->state);
2302
2303         napi_enable(&adapter->napi);
2304
2305         e1000_irq_enable(adapter);
2306
2307         /* fire a link status change interrupt to start the watchdog */
2308         ew32(ICS, E1000_ICS_LSC);
2309
2310         return 0;
2311
2312 err_req_irq:
2313         e1000_release_hw_control(adapter);
2314         e1000_power_down_phy(adapter);
2315         e1000e_free_rx_resources(adapter);
2316 err_setup_rx:
2317         e1000e_free_tx_resources(adapter);
2318 err_setup_tx:
2319         e1000e_reset(adapter);
2320
2321         return err;
2322 }
2323
2324 /**
2325  * e1000_close - Disables a network interface
2326  * @netdev: network interface device structure
2327  *
2328  * Returns 0, this is not allowed to fail
2329  *
2330  * The close entry point is called when an interface is de-activated
2331  * by the OS.  The hardware is still under the drivers control, but
2332  * needs to be disabled.  A global MAC reset is issued to stop the
2333  * hardware, and all transmit and receive resources are freed.
2334  **/
2335 static int e1000_close(struct net_device *netdev)
2336 {
2337         struct e1000_adapter *adapter = netdev_priv(netdev);
2338
2339         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
2340         e1000e_down(adapter);
2341         e1000_power_down_phy(adapter);
2342         e1000_free_irq(adapter);
2343
2344         e1000e_free_tx_resources(adapter);
2345         e1000e_free_rx_resources(adapter);
2346
2347         /* kill manageability vlan ID if supported, but not if a vlan with
2348          * the same ID is registered on the host OS (let 8021q kill it) */
2349         if ((adapter->hw.mng_cookie.status &
2350                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2351              !(adapter->vlgrp &&
2352                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
2353                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2354
2355         /* If AMT is enabled, let the firmware know that the network
2356          * interface is now closed */
2357         if ((adapter->flags & FLAG_HAS_AMT) &&
2358             e1000e_check_mng_mode(&adapter->hw))
2359                 e1000_release_hw_control(adapter);
2360
2361         return 0;
2362 }
2363 /**
2364  * e1000_set_mac - Change the Ethernet Address of the NIC
2365  * @netdev: network interface device structure
2366  * @p: pointer to an address structure
2367  *
2368  * Returns 0 on success, negative on failure
2369  **/
2370 static int e1000_set_mac(struct net_device *netdev, void *p)
2371 {
2372         struct e1000_adapter *adapter = netdev_priv(netdev);
2373         struct sockaddr *addr = p;
2374
2375         if (!is_valid_ether_addr(addr->sa_data))
2376                 return -EADDRNOTAVAIL;
2377
2378         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
2379         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
2380
2381         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
2382
2383         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
2384                 /* activate the work around */
2385                 e1000e_set_laa_state_82571(&adapter->hw, 1);
2386
2387                 /* Hold a copy of the LAA in RAR[14] This is done so that
2388                  * between the time RAR[0] gets clobbered  and the time it
2389                  * gets fixed (in e1000_watchdog), the actual LAA is in one
2390                  * of the RARs and no incoming packets directed to this port
2391                  * are dropped. Eventually the LAA will be in RAR[0] and
2392                  * RAR[14] */
2393                 e1000e_rar_set(&adapter->hw,
2394                               adapter->hw.mac.addr,
2395                               adapter->hw.mac.rar_entry_count - 1);
2396         }
2397
2398         return 0;
2399 }
2400
2401 /* Need to wait a few seconds after link up to get diagnostic information from
2402  * the phy */
2403 static void e1000_update_phy_info(unsigned long data)
2404 {
2405         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2406         e1000_get_phy_info(&adapter->hw);
2407 }
2408
2409 /**
2410  * e1000e_update_stats - Update the board statistics counters
2411  * @adapter: board private structure
2412  **/
2413 void e1000e_update_stats(struct e1000_adapter *adapter)
2414 {
2415         struct e1000_hw *hw = &adapter->hw;
2416         struct pci_dev *pdev = adapter->pdev;
2417         unsigned long irq_flags;
2418         u16 phy_tmp;
2419
2420 #define PHY_IDLE_ERROR_COUNT_MASK 0x00FF
2421
2422         /*
2423          * Prevent stats update while adapter is being reset, or if the pci
2424          * connection is down.
2425          */
2426         if (adapter->link_speed == 0)
2427                 return;
2428         if (pci_channel_offline(pdev))
2429                 return;
2430
2431         spin_lock_irqsave(&adapter->stats_lock, irq_flags);
2432
2433         /* these counters are modified from e1000_adjust_tbi_stats,
2434          * called from the interrupt context, so they must only
2435          * be written while holding adapter->stats_lock
2436          */
2437
2438         adapter->stats.crcerrs += er32(CRCERRS);
2439         adapter->stats.gprc += er32(GPRC);
2440         adapter->stats.gorcl += er32(GORCL);
2441         adapter->stats.gorch += er32(GORCH);
2442         adapter->stats.bprc += er32(BPRC);
2443         adapter->stats.mprc += er32(MPRC);
2444         adapter->stats.roc += er32(ROC);
2445
2446         if (adapter->flags & FLAG_HAS_STATS_PTC_PRC) {
2447                 adapter->stats.prc64 += er32(PRC64);
2448                 adapter->stats.prc127 += er32(PRC127);
2449                 adapter->stats.prc255 += er32(PRC255);
2450                 adapter->stats.prc511 += er32(PRC511);
2451                 adapter->stats.prc1023 += er32(PRC1023);
2452                 adapter->stats.prc1522 += er32(PRC1522);
2453                 adapter->stats.symerrs += er32(SYMERRS);
2454                 adapter->stats.sec += er32(SEC);
2455         }
2456
2457         adapter->stats.mpc += er32(MPC);
2458         adapter->stats.scc += er32(SCC);
2459         adapter->stats.ecol += er32(ECOL);
2460         adapter->stats.mcc += er32(MCC);
2461         adapter->stats.latecol += er32(LATECOL);
2462         adapter->stats.dc += er32(DC);
2463         adapter->stats.rlec += er32(RLEC);
2464         adapter->stats.xonrxc += er32(XONRXC);
2465         adapter->stats.xontxc += er32(XONTXC);
2466         adapter->stats.xoffrxc += er32(XOFFRXC);
2467         adapter->stats.xofftxc += er32(XOFFTXC);
2468         adapter->stats.fcruc += er32(FCRUC);
2469         adapter->stats.gptc += er32(GPTC);
2470         adapter->stats.gotcl += er32(GOTCL);
2471         adapter->stats.gotch += er32(GOTCH);
2472         adapter->stats.rnbc += er32(RNBC);
2473         adapter->stats.ruc += er32(RUC);
2474         adapter->stats.rfc += er32(RFC);
2475         adapter->stats.rjc += er32(RJC);
2476         adapter->stats.torl += er32(TORL);
2477         adapter->stats.torh += er32(TORH);
2478         adapter->stats.totl += er32(TOTL);
2479         adapter->stats.toth += er32(TOTH);
2480         adapter->stats.tpr += er32(TPR);
2481
2482         if (adapter->flags & FLAG_HAS_STATS_PTC_PRC) {
2483                 adapter->stats.ptc64 += er32(PTC64);
2484                 adapter->stats.ptc127 += er32(PTC127);
2485                 adapter->stats.ptc255 += er32(PTC255);
2486                 adapter->stats.ptc511 += er32(PTC511);
2487                 adapter->stats.ptc1023 += er32(PTC1023);
2488                 adapter->stats.ptc1522 += er32(PTC1522);
2489         }
2490
2491         adapter->stats.mptc += er32(MPTC);
2492         adapter->stats.bptc += er32(BPTC);
2493
2494         /* used for adaptive IFS */
2495
2496         hw->mac.tx_packet_delta = er32(TPT);
2497         adapter->stats.tpt += hw->mac.tx_packet_delta;
2498         hw->mac.collision_delta = er32(COLC);
2499         adapter->stats.colc += hw->mac.collision_delta;
2500
2501         adapter->stats.algnerrc += er32(ALGNERRC);
2502         adapter->stats.rxerrc += er32(RXERRC);
2503         adapter->stats.tncrs += er32(TNCRS);
2504         adapter->stats.cexterr += er32(CEXTERR);
2505         adapter->stats.tsctc += er32(TSCTC);
2506         adapter->stats.tsctfc += er32(TSCTFC);
2507
2508         adapter->stats.iac += er32(IAC);
2509
2510         if (adapter->flags & FLAG_HAS_STATS_ICR_ICT) {
2511                 adapter->stats.icrxoc += er32(ICRXOC);
2512                 adapter->stats.icrxptc += er32(ICRXPTC);
2513                 adapter->stats.icrxatc += er32(ICRXATC);
2514                 adapter->stats.ictxptc += er32(ICTXPTC);
2515                 adapter->stats.ictxatc += er32(ICTXATC);
2516                 adapter->stats.ictxqec += er32(ICTXQEC);
2517                 adapter->stats.ictxqmtc += er32(ICTXQMTC);
2518                 adapter->stats.icrxdmtc += er32(ICRXDMTC);
2519         }
2520
2521         /* Fill out the OS statistics structure */
2522         adapter->net_stats.multicast = adapter->stats.mprc;
2523         adapter->net_stats.collisions = adapter->stats.colc;
2524
2525         /* Rx Errors */
2526
2527         /* RLEC on some newer hardware can be incorrect so build
2528         * our own version based on RUC and ROC */
2529         adapter->net_stats.rx_errors = adapter->stats.rxerrc +
2530                 adapter->stats.crcerrs + adapter->stats.algnerrc +
2531                 adapter->stats.ruc + adapter->stats.roc +
2532                 adapter->stats.cexterr;
2533         adapter->net_stats.rx_length_errors = adapter->stats.ruc +
2534                                               adapter->stats.roc;
2535         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2536         adapter->net_stats.rx_frame_errors = adapter->stats.algnerrc;
2537         adapter->net_stats.rx_missed_errors = adapter->stats.mpc;
2538
2539         /* Tx Errors */
2540         adapter->net_stats.tx_errors = adapter->stats.ecol +
2541                                        adapter->stats.latecol;
2542         adapter->net_stats.tx_aborted_errors = adapter->stats.ecol;
2543         adapter->net_stats.tx_window_errors = adapter->stats.latecol;
2544         adapter->net_stats.tx_carrier_errors = adapter->stats.tncrs;
2545
2546         /* Tx Dropped needs to be maintained elsewhere */
2547
2548         /* Phy Stats */
2549         if (hw->media_type == e1000_media_type_copper) {
2550                 if ((adapter->link_speed == SPEED_1000) &&
2551                    (!e1e_rphy(hw, PHY_1000T_STATUS, &phy_tmp))) {
2552                         phy_tmp &= PHY_IDLE_ERROR_COUNT_MASK;
2553                         adapter->phy_stats.idle_errors += phy_tmp;
2554                 }
2555         }
2556
2557         /* Management Stats */
2558         adapter->stats.mgptc += er32(MGTPTC);
2559         adapter->stats.mgprc += er32(MGTPRC);
2560         adapter->stats.mgpdc += er32(MGTPDC);
2561
2562         spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
2563 }
2564
2565 static void e1000_print_link_info(struct e1000_adapter *adapter)
2566 {
2567         struct net_device *netdev = adapter->netdev;
2568         struct e1000_hw *hw = &adapter->hw;
2569         u32 ctrl = er32(CTRL);
2570
2571         ndev_info(netdev,
2572                 "Link is Up %d Mbps %s, Flow Control: %s\n",
2573                 adapter->link_speed,
2574                 (adapter->link_duplex == FULL_DUPLEX) ?
2575                                 "Full Duplex" : "Half Duplex",
2576                 ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
2577                                 "RX/TX" :
2578                 ((ctrl & E1000_CTRL_RFCE) ? "RX" :
2579                 ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
2580 }
2581
2582 /**
2583  * e1000_watchdog - Timer Call-back
2584  * @data: pointer to adapter cast into an unsigned long
2585  **/
2586 static void e1000_watchdog(unsigned long data)
2587 {
2588         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
2589
2590         /* Do the rest outside of interrupt context */
2591         schedule_work(&adapter->watchdog_task);
2592
2593         /* TODO: make this use queue_delayed_work() */
2594 }
2595
2596 static void e1000_watchdog_task(struct work_struct *work)
2597 {
2598         struct e1000_adapter *adapter = container_of(work,
2599                                         struct e1000_adapter, watchdog_task);
2600
2601         struct net_device *netdev = adapter->netdev;
2602         struct e1000_mac_info *mac = &adapter->hw.mac;
2603         struct e1000_ring *tx_ring = adapter->tx_ring;
2604         struct e1000_hw *hw = &adapter->hw;
2605         u32 link, tctl;
2606         s32 ret_val;
2607         int tx_pending = 0;
2608
2609         if ((netif_carrier_ok(netdev)) &&
2610             (er32(STATUS) & E1000_STATUS_LU))
2611                 goto link_up;
2612
2613         ret_val = mac->ops.check_for_link(hw);
2614         if ((ret_val == E1000_ERR_PHY) &&
2615             (adapter->hw.phy.type == e1000_phy_igp_3) &&
2616             (er32(CTRL) &
2617              E1000_PHY_CTRL_GBE_DISABLE)) {
2618                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
2619                 ndev_info(netdev,
2620                         "Gigabit has been disabled, downgrading speed\n");
2621         }
2622
2623         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
2624             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
2625                 e1000_update_mng_vlan(adapter);
2626
2627         if ((adapter->hw.media_type == e1000_media_type_internal_serdes) &&
2628            !(er32(TXCW) & E1000_TXCW_ANE))
2629                 link = adapter->hw.mac.serdes_has_link;
2630         else
2631                 link = er32(STATUS) & E1000_STATUS_LU;
2632
2633         if (link) {
2634                 if (!netif_carrier_ok(netdev)) {
2635                         bool txb2b = 1;
2636                         mac->ops.get_link_up_info(&adapter->hw,
2637                                                    &adapter->link_speed,
2638                                                    &adapter->link_duplex);
2639                         e1000_print_link_info(adapter);
2640                         /* tweak tx_queue_len according to speed/duplex
2641                          * and adjust the timeout factor */
2642                         netdev->tx_queue_len = adapter->tx_queue_len;
2643                         adapter->tx_timeout_factor = 1;
2644                         switch (adapter->link_speed) {
2645                         case SPEED_10:
2646                                 txb2b = 0;
2647                                 netdev->tx_queue_len = 10;
2648                                 adapter->tx_timeout_factor = 14;
2649                                 break;
2650                         case SPEED_100:
2651                                 txb2b = 0;
2652                                 netdev->tx_queue_len = 100;
2653                                 /* maybe add some timeout factor ? */
2654                                 break;
2655                         }
2656
2657                         /* workaround: re-program speed mode bit after
2658                          * link-up event */
2659                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
2660                             !txb2b) {
2661                                 u32 tarc0;
2662                                 tarc0 = er32(TARC0);
2663                                 tarc0 &= ~SPEED_MODE_BIT;
2664                                 ew32(TARC0, tarc0);
2665                         }
2666
2667                         /* disable TSO for pcie and 10/100 speeds, to avoid
2668                          * some hardware issues */
2669                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
2670                                 switch (adapter->link_speed) {
2671                                 case SPEED_10:
2672                                 case SPEED_100:
2673                                         ndev_info(netdev,
2674                                         "10/100 speed: disabling TSO\n");
2675                                         netdev->features &= ~NETIF_F_TSO;
2676                                         netdev->features &= ~NETIF_F_TSO6;
2677                                         break;
2678                                 case SPEED_1000:
2679                                         netdev->features |= NETIF_F_TSO;
2680                                         netdev->features |= NETIF_F_TSO6;
2681                                         break;
2682                                 default:
2683                                         /* oops */
2684                                         break;
2685                                 }
2686                         }
2687
2688                         /* enable transmits in the hardware, need to do this
2689                          * after setting TARC0 */
2690                         tctl = er32(TCTL);
2691                         tctl |= E1000_TCTL_EN;
2692                         ew32(TCTL, tctl);
2693
2694                         netif_carrier_on(netdev);
2695                         netif_wake_queue(netdev);
2696
2697                         if (!test_bit(__E1000_DOWN, &adapter->state))
2698                                 mod_timer(&adapter->phy_info_timer,
2699                                           round_jiffies(jiffies + 2 * HZ));
2700                 } else {
2701                         /* make sure the receive unit is started */
2702                         if (adapter->flags & FLAG_RX_NEEDS_RESTART) {
2703                                 u32 rctl = er32(RCTL);
2704                                 ew32(RCTL, rctl |
2705                                                 E1000_RCTL_EN);
2706                         }
2707                 }
2708         } else {
2709                 if (netif_carrier_ok(netdev)) {
2710                         adapter->link_speed = 0;
2711                         adapter->link_duplex = 0;
2712                         ndev_info(netdev, "Link is Down\n");
2713                         netif_carrier_off(netdev);
2714                         netif_stop_queue(netdev);
2715                         if (!test_bit(__E1000_DOWN, &adapter->state))
2716                                 mod_timer(&adapter->phy_info_timer,
2717                                           round_jiffies(jiffies + 2 * HZ));
2718
2719                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
2720                                 schedule_work(&adapter->reset_task);
2721                 }
2722         }
2723
2724 link_up:
2725         e1000e_update_stats(adapter);
2726
2727         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
2728         adapter->tpt_old = adapter->stats.tpt;
2729         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
2730         adapter->colc_old = adapter->stats.colc;
2731
2732         adapter->gorcl = adapter->stats.gorcl - adapter->gorcl_old;
2733         adapter->gorcl_old = adapter->stats.gorcl;
2734         adapter->gotcl = adapter->stats.gotcl - adapter->gotcl_old;
2735         adapter->gotcl_old = adapter->stats.gotcl;
2736
2737         e1000e_update_adaptive(&adapter->hw);
2738
2739         if (!netif_carrier_ok(netdev)) {
2740                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
2741                                tx_ring->count);
2742                 if (tx_pending) {
2743                         /* We've lost link, so the controller stops DMA,
2744                          * but we've got queued Tx work that's never going
2745                          * to get done, so reset controller to flush Tx.
2746                          * (Do the reset outside of interrupt context). */
2747                         adapter->tx_timeout_count++;
2748                         schedule_work(&adapter->reset_task);
2749                 }
2750         }
2751
2752         /* Cause software interrupt to ensure rx ring is cleaned */
2753         ew32(ICS, E1000_ICS_RXDMT0);
2754
2755         /* Force detection of hung controller every watchdog period */
2756         adapter->detect_tx_hung = 1;
2757
2758         /* With 82571 controllers, LAA may be overwritten due to controller
2759          * reset from the other port. Set the appropriate LAA in RAR[0] */
2760         if (e1000e_get_laa_state_82571(hw))
2761                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
2762
2763         /* Reset the timer */
2764         if (!test_bit(__E1000_DOWN, &adapter->state))
2765                 mod_timer(&adapter->watchdog_timer,
2766                           round_jiffies(jiffies + 2 * HZ));
2767 }
2768
2769 #define E1000_TX_FLAGS_CSUM             0x00000001
2770 #define E1000_TX_FLAGS_VLAN             0x00000002
2771 #define E1000_TX_FLAGS_TSO              0x00000004
2772 #define E1000_TX_FLAGS_IPV4             0x00000008
2773 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
2774 #define E1000_TX_FLAGS_VLAN_SHIFT       16
2775
2776 static int e1000_tso(struct e1000_adapter *adapter,
2777                      struct sk_buff *skb)
2778 {
2779         struct e1000_ring *tx_ring = adapter->tx_ring;
2780         struct e1000_context_desc *context_desc;
2781         struct e1000_buffer *buffer_info;
2782         unsigned int i;
2783         u32 cmd_length = 0;
2784         u16 ipcse = 0, tucse, mss;
2785         u8 ipcss, ipcso, tucss, tucso, hdr_len;
2786         int err;
2787
2788         if (skb_is_gso(skb)) {
2789                 if (skb_header_cloned(skb)) {
2790                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2791                         if (err)
2792                                 return err;
2793                 }
2794
2795                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
2796                 mss = skb_shinfo(skb)->gso_size;
2797                 if (skb->protocol == htons(ETH_P_IP)) {
2798                         struct iphdr *iph = ip_hdr(skb);
2799                         iph->tot_len = 0;
2800                         iph->check = 0;
2801                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2802                                                                  iph->daddr, 0,
2803                                                                  IPPROTO_TCP,
2804                                                                  0);
2805                         cmd_length = E1000_TXD_CMD_IP;
2806                         ipcse = skb_transport_offset(skb) - 1;
2807                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2808                         ipv6_hdr(skb)->payload_len = 0;
2809                         tcp_hdr(skb)->check =
2810                                 ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2811                                                  &ipv6_hdr(skb)->daddr,
2812                                                  0, IPPROTO_TCP, 0);
2813                         ipcse = 0;
2814                 }
2815                 ipcss = skb_network_offset(skb);
2816                 ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
2817                 tucss = skb_transport_offset(skb);
2818                 tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
2819                 tucse = 0;
2820
2821                 cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
2822                                E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
2823
2824                 i = tx_ring->next_to_use;
2825                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2826                 buffer_info = &tx_ring->buffer_info[i];
2827
2828                 context_desc->lower_setup.ip_fields.ipcss  = ipcss;
2829                 context_desc->lower_setup.ip_fields.ipcso  = ipcso;
2830                 context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
2831                 context_desc->upper_setup.tcp_fields.tucss = tucss;
2832                 context_desc->upper_setup.tcp_fields.tucso = tucso;
2833                 context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
2834                 context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
2835                 context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
2836                 context_desc->cmd_and_length = cpu_to_le32(cmd_length);
2837
2838                 buffer_info->time_stamp = jiffies;
2839                 buffer_info->next_to_watch = i;
2840
2841                 i++;
2842                 if (i == tx_ring->count)
2843                         i = 0;
2844                 tx_ring->next_to_use = i;
2845
2846                 return 1;
2847         }
2848
2849         return 0;
2850 }
2851
2852 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
2853 {
2854         struct e1000_ring *tx_ring = adapter->tx_ring;
2855         struct e1000_context_desc *context_desc;
2856         struct e1000_buffer *buffer_info;
2857         unsigned int i;
2858         u8 css;
2859
2860         if (skb->ip_summed == CHECKSUM_PARTIAL) {
2861                 css = skb_transport_offset(skb);
2862
2863                 i = tx_ring->next_to_use;
2864                 buffer_info = &tx_ring->buffer_info[i];
2865                 context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
2866
2867                 context_desc->lower_setup.ip_config = 0;
2868                 context_desc->upper_setup.tcp_fields.tucss = css;
2869                 context_desc->upper_setup.tcp_fields.tucso =
2870                                         css + skb->csum_offset;
2871                 context_desc->upper_setup.tcp_fields.tucse = 0;
2872                 context_desc->tcp_seg_setup.data = 0;
2873                 context_desc->cmd_and_length = cpu_to_le32(E1000_TXD_CMD_DEXT);
2874
2875                 buffer_info->time_stamp = jiffies;
2876                 buffer_info->next_to_watch = i;
2877
2878                 i++;
2879                 if (i == tx_ring->count)
2880                         i = 0;
2881                 tx_ring->next_to_use = i;
2882
2883                 return 1;
2884         }
2885
2886         return 0;
2887 }
2888
2889 #define E1000_MAX_PER_TXD       8192
2890 #define E1000_MAX_TXD_PWR       12
2891
2892 static int e1000_tx_map(struct e1000_adapter *adapter,
2893                         struct sk_buff *skb, unsigned int first,
2894                         unsigned int max_per_txd, unsigned int nr_frags,
2895                         unsigned int mss)
2896 {
2897         struct e1000_ring *tx_ring = adapter->tx_ring;
2898         struct e1000_buffer *buffer_info;
2899         unsigned int len = skb->len - skb->data_len;
2900         unsigned int offset = 0, size, count = 0, i;
2901         unsigned int f;
2902
2903         i = tx_ring->next_to_use;
2904
2905         while (len) {
2906                 buffer_info = &tx_ring->buffer_info[i];
2907                 size = min(len, max_per_txd);
2908
2909                 /* Workaround for premature desc write-backs
2910                  * in TSO mode.  Append 4-byte sentinel desc */
2911                 if (mss && !nr_frags && size == len && size > 8)
2912                         size -= 4;
2913
2914                 buffer_info->length = size;
2915                 /* set time_stamp *before* dma to help avoid a possible race */
2916                 buffer_info->time_stamp = jiffies;
2917                 buffer_info->dma =
2918                         pci_map_single(adapter->pdev,
2919                                 skb->data + offset,
2920                                 size,
2921                                 PCI_DMA_TODEVICE);
2922                 if (pci_dma_mapping_error(buffer_info->dma)) {
2923                         dev_err(&adapter->pdev->dev, "TX DMA map failed\n");
2924                         adapter->tx_dma_failed++;
2925                         return -1;
2926                 }
2927                 buffer_info->next_to_watch = i;
2928
2929                 len -= size;
2930                 offset += size;
2931                 count++;
2932                 i++;
2933                 if (i == tx_ring->count)
2934                         i = 0;
2935         }
2936
2937         for (f = 0; f < nr_frags; f++) {
2938                 struct skb_frag_struct *frag;
2939
2940                 frag = &skb_shinfo(skb)->frags[f];
2941                 len = frag->size;
2942                 offset = frag->page_offset;
2943
2944                 while (len) {
2945                         buffer_info = &tx_ring->buffer_info[i];
2946                         size = min(len, max_per_txd);
2947                         /* Workaround for premature desc write-backs
2948                          * in TSO mode.  Append 4-byte sentinel desc */
2949                         if (mss && f == (nr_frags-1) && size == len && size > 8)
2950                                 size -= 4;
2951
2952                         buffer_info->length = size;
2953                         buffer_info->time_stamp = jiffies;
2954                         buffer_info->dma =
2955                                 pci_map_page(adapter->pdev,
2956                                         frag->page,
2957                                         offset,
2958                                         size,
2959                                         PCI_DMA_TODEVICE);
2960                         if (pci_dma_mapping_error(buffer_info->dma)) {
2961                                 dev_err(&adapter->pdev->dev,
2962                                         "TX DMA page map failed\n");
2963                                 adapter->tx_dma_failed++;
2964                                 return -1;
2965                         }
2966
2967                         buffer_info->next_to_watch = i;
2968
2969                         len -= size;
2970                         offset += size;
2971                         count++;
2972
2973                         i++;
2974                         if (i == tx_ring->count)
2975                                 i = 0;
2976                 }
2977         }
2978
2979         if (i == 0)
2980                 i = tx_ring->count - 1;
2981         else
2982                 i--;
2983
2984         tx_ring->buffer_info[i].skb = skb;
2985         tx_ring->buffer_info[first].next_to_watch = i;
2986
2987         return count;
2988 }
2989
2990 static void e1000_tx_queue(struct e1000_adapter *adapter,
2991                            int tx_flags, int count)
2992 {
2993         struct e1000_ring *tx_ring = adapter->tx_ring;
2994         struct e1000_tx_desc *tx_desc = NULL;
2995         struct e1000_buffer *buffer_info;
2996         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
2997         unsigned int i;
2998
2999         if (tx_flags & E1000_TX_FLAGS_TSO) {
3000                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3001                              E1000_TXD_CMD_TSE;
3002                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3003
3004                 if (tx_flags & E1000_TX_FLAGS_IPV4)
3005                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
3006         }
3007
3008         if (tx_flags & E1000_TX_FLAGS_CSUM) {
3009                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
3010                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
3011         }
3012
3013         if (tx_flags & E1000_TX_FLAGS_VLAN) {
3014                 txd_lower |= E1000_TXD_CMD_VLE;
3015                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
3016         }
3017
3018         i = tx_ring->next_to_use;
3019
3020         while (count--) {
3021                 buffer_info = &tx_ring->buffer_info[i];
3022                 tx_desc = E1000_TX_DESC(*tx_ring, i);
3023                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
3024                 tx_desc->lower.data =
3025                         cpu_to_le32(txd_lower | buffer_info->length);
3026                 tx_desc->upper.data = cpu_to_le32(txd_upper);
3027
3028                 i++;
3029                 if (i == tx_ring->count)
3030                         i = 0;
3031         }
3032
3033         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
3034
3035         /* Force memory writes to complete before letting h/w
3036          * know there are new descriptors to fetch.  (Only
3037          * applicable for weak-ordered memory model archs,
3038          * such as IA-64). */
3039         wmb();
3040
3041         tx_ring->next_to_use = i;
3042         writel(i, adapter->hw.hw_addr + tx_ring->tail);
3043         /* we need this if more than one processor can write to our tail
3044          * at a time, it synchronizes IO on IA64/Altix systems */
3045         mmiowb();
3046 }
3047
3048 #define MINIMUM_DHCP_PACKET_SIZE 282
3049 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
3050                                     struct sk_buff *skb)
3051 {
3052         struct e1000_hw *hw =  &adapter->hw;
3053         u16 length, offset;
3054
3055         if (vlan_tx_tag_present(skb)) {
3056                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id)
3057                     && (adapter->hw.mng_cookie.status &
3058                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
3059                         return 0;
3060         }
3061
3062         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
3063                 return 0;
3064
3065         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
3066                 return 0;
3067
3068         {
3069                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
3070                 struct udphdr *udp;
3071
3072                 if (ip->protocol != IPPROTO_UDP)
3073                         return 0;
3074
3075                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
3076                 if (ntohs(udp->dest) != 67)
3077                         return 0;
3078
3079                 offset = (u8 *)udp + 8 - skb->data;
3080                 length = skb->len - offset;
3081                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
3082         }
3083
3084         return 0;
3085 }
3086
3087 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
3088 {
3089         struct e1000_adapter *adapter = netdev_priv(netdev);
3090
3091         netif_stop_queue(netdev);
3092         /* Herbert's original patch had:
3093          *  smp_mb__after_netif_stop_queue();
3094          * but since that doesn't exist yet, just open code it. */
3095         smp_mb();
3096
3097         /* We need to check again in a case another CPU has just
3098          * made room available. */
3099         if (e1000_desc_unused(adapter->tx_ring) < size)
3100                 return -EBUSY;
3101
3102         /* A reprieve! */
3103         netif_start_queue(netdev);
3104         ++adapter->restart_queue;
3105         return 0;
3106 }
3107
3108 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
3109 {
3110         struct e1000_adapter *adapter = netdev_priv(netdev);
3111
3112         if (e1000_desc_unused(adapter->tx_ring) >= size)
3113                 return 0;
3114         return __e1000_maybe_stop_tx(netdev, size);
3115 }
3116
3117 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
3118 static int e1000_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3119 {
3120         struct e1000_adapter *adapter = netdev_priv(netdev);
3121         struct e1000_ring *tx_ring = adapter->tx_ring;
3122         unsigned int first;
3123         unsigned int max_per_txd = E1000_MAX_PER_TXD;
3124         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
3125         unsigned int tx_flags = 0;
3126         unsigned int len = skb->len - skb->data_len;
3127         unsigned long irq_flags;
3128         unsigned int nr_frags;
3129         unsigned int mss;
3130         int count = 0;
3131         int tso;
3132         unsigned int f;
3133
3134         if (test_bit(__E1000_DOWN, &adapter->state)) {
3135                 dev_kfree_skb_any(skb);
3136                 return NETDEV_TX_OK;
3137         }
3138
3139         if (skb->len <= 0) {
3140                 dev_kfree_skb_any(skb);
3141                 return NETDEV_TX_OK;
3142         }
3143
3144         mss = skb_shinfo(skb)->gso_size;
3145         /* The controller does a simple calculation to
3146          * make sure there is enough room in the FIFO before
3147          * initiating the DMA for each buffer.  The calc is:
3148          * 4 = ceil(buffer len/mss).  To make sure we don't
3149          * overrun the FIFO, adjust the max buffer len if mss
3150          * drops. */
3151         if (mss) {
3152                 u8 hdr_len;
3153                 max_per_txd = min(mss << 2, max_per_txd);
3154                 max_txd_pwr = fls(max_per_txd) - 1;
3155
3156                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
3157                 * points to just header, pull a few bytes of payload from
3158                 * frags into skb->data */
3159                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3160                 if (skb->data_len && (hdr_len == len)) {
3161                         unsigned int pull_size;
3162
3163                         pull_size = min((unsigned int)4, skb->data_len);
3164                         if (!__pskb_pull_tail(skb, pull_size)) {
3165                                 ndev_err(netdev,
3166                                          "__pskb_pull_tail failed.\n");
3167                                 dev_kfree_skb_any(skb);
3168                                 return NETDEV_TX_OK;
3169                         }
3170                         len = skb->len - skb->data_len;
3171                 }
3172         }
3173
3174         /* reserve a descriptor for the offload context */
3175         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
3176                 count++;
3177         count++;
3178
3179         count += TXD_USE_COUNT(len, max_txd_pwr);
3180
3181         nr_frags = skb_shinfo(skb)->nr_frags;
3182         for (f = 0; f < nr_frags; f++)
3183                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
3184                                        max_txd_pwr);
3185
3186         if (adapter->hw.mac.tx_pkt_filtering)
3187                 e1000_transfer_dhcp_info(adapter, skb);
3188
3189         if (!spin_trylock_irqsave(&adapter->tx_queue_lock, irq_flags))
3190                 /* Collision - tell upper layer to requeue */
3191                 return NETDEV_TX_LOCKED;
3192
3193         /* need: count + 2 desc gap to keep tail from touching
3194          * head, otherwise try next time */
3195         if (e1000_maybe_stop_tx(netdev, count + 2)) {
3196                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3197                 return NETDEV_TX_BUSY;
3198         }
3199
3200         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3201                 tx_flags |= E1000_TX_FLAGS_VLAN;
3202                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
3203         }
3204
3205         first = tx_ring->next_to_use;
3206
3207         tso = e1000_tso(adapter, skb);
3208         if (tso < 0) {
3209                 dev_kfree_skb_any(skb);
3210                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3211                 return NETDEV_TX_OK;
3212         }
3213
3214         if (tso)
3215                 tx_flags |= E1000_TX_FLAGS_TSO;
3216         else if (e1000_tx_csum(adapter, skb))
3217                 tx_flags |= E1000_TX_FLAGS_CSUM;
3218
3219         /* Old method was to assume IPv4 packet by default if TSO was enabled.
3220          * 82571 hardware supports TSO capabilities for IPv6 as well...
3221          * no longer assume, we must. */
3222         if (skb->protocol == htons(ETH_P_IP))
3223                 tx_flags |= E1000_TX_FLAGS_IPV4;
3224
3225         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
3226         if (count < 0) {
3227                 /* handle pci_map_single() error in e1000_tx_map */
3228                 dev_kfree_skb_any(skb);
3229                 spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3230                 return NETDEV_TX_OK;
3231         }
3232
3233         e1000_tx_queue(adapter, tx_flags, count);
3234
3235         netdev->trans_start = jiffies;
3236
3237         /* Make sure there is space in the ring for the next send. */
3238         e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
3239
3240         spin_unlock_irqrestore(&adapter->tx_queue_lock, irq_flags);
3241         return NETDEV_TX_OK;
3242 }
3243
3244 /**
3245  * e1000_tx_timeout - Respond to a Tx Hang
3246  * @netdev: network interface device structure
3247  **/
3248 static void e1000_tx_timeout(struct net_device *netdev)
3249 {
3250         struct e1000_adapter *adapter = netdev_priv(netdev);
3251
3252         /* Do the reset outside of interrupt context */
3253         adapter->tx_timeout_count++;
3254         schedule_work(&adapter->reset_task);
3255 }
3256
3257 static void e1000_reset_task(struct work_struct *work)
3258 {
3259         struct e1000_adapter *adapter;
3260         adapter = container_of(work, struct e1000_adapter, reset_task);
3261
3262         e1000e_reinit_locked(adapter);
3263 }
3264
3265 /**
3266  * e1000_get_stats - Get System Network Statistics
3267  * @netdev: network interface device structure
3268  *
3269  * Returns the address of the device statistics structure.
3270  * The statistics are actually updated from the timer callback.
3271  **/
3272 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
3273 {
3274         struct e1000_adapter *adapter = netdev_priv(netdev);
3275
3276         /* only return the current stats */
3277         return &adapter->net_stats;
3278 }
3279
3280 /**
3281  * e1000_change_mtu - Change the Maximum Transfer Unit
3282  * @netdev: network interface device structure
3283  * @new_mtu: new value for maximum frame size
3284  *
3285  * Returns 0 on success, negative on failure
3286  **/
3287 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
3288 {
3289         struct e1000_adapter *adapter = netdev_priv(netdev);
3290         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
3291
3292         if ((max_frame < ETH_ZLEN + ETH_FCS_LEN) ||
3293             (max_frame > MAX_JUMBO_FRAME_SIZE)) {
3294                 ndev_err(netdev, "Invalid MTU setting\n");
3295                 return -EINVAL;
3296         }
3297
3298         /* Jumbo frame size limits */
3299         if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
3300                 if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
3301                         ndev_err(netdev, "Jumbo Frames not supported.\n");
3302                         return -EINVAL;
3303                 }
3304                 if (adapter->hw.phy.type == e1000_phy_ife) {
3305                         ndev_err(netdev, "Jumbo Frames not supported.\n");
3306                         return -EINVAL;
3307                 }
3308         }
3309
3310 #define MAX_STD_JUMBO_FRAME_SIZE 9234
3311         if (max_frame > MAX_STD_JUMBO_FRAME_SIZE) {
3312                 ndev_err(netdev, "MTU > 9216 not supported.\n");
3313                 return -EINVAL;
3314         }
3315
3316         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3317                 msleep(1);
3318         /* e1000e_down has a dependency on max_frame_size */
3319         adapter->hw.mac.max_frame_size = max_frame;
3320         if (netif_running(netdev))
3321                 e1000e_down(adapter);
3322
3323         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
3324          * means we reserve 2 more, this pushes us to allocate from the next
3325          * larger slab size.
3326          * i.e. RXBUFFER_2048 --> size-4096 slab */
3327
3328         if (max_frame <= 256)
3329                 adapter->rx_buffer_len = 256;
3330         else if (max_frame <= 512)
3331                 adapter->rx_buffer_len = 512;
3332         else if (max_frame <= 1024)
3333                 adapter->rx_buffer_len = 1024;
3334         else if (max_frame <= 2048)
3335                 adapter->rx_buffer_len = 2048;
3336         else
3337                 adapter->rx_buffer_len = 4096;
3338
3339         /* adjust allocation if LPE protects us, and we aren't using SBP */
3340         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
3341              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
3342                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
3343                                          + ETH_FCS_LEN ;
3344
3345         ndev_info(netdev, "changing MTU from %d to %d\n",
3346                 netdev->mtu, new_mtu);
3347         netdev->mtu = new_mtu;
3348
3349         if (netif_running(netdev))
3350                 e1000e_up(adapter);
3351         else
3352                 e1000e_reset(adapter);
3353
3354         clear_bit(__E1000_RESETTING, &adapter->state);
3355
3356         return 0;
3357 }
3358
3359 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
3360                            int cmd)
3361 {
3362         struct e1000_adapter *adapter = netdev_priv(netdev);
3363         struct mii_ioctl_data *data = if_mii(ifr);
3364         unsigned long irq_flags;
3365
3366         if (adapter->hw.media_type != e1000_media_type_copper)
3367                 return -EOPNOTSUPP;
3368
3369         switch (cmd) {
3370         case SIOCGMIIPHY:
3371                 data->phy_id = adapter->hw.phy.addr;
3372                 break;
3373         case SIOCGMIIREG:
3374                 if (!capable(CAP_NET_ADMIN))
3375                         return -EPERM;
3376                 spin_lock_irqsave(&adapter->stats_lock, irq_flags);
3377                 if (e1e_rphy(&adapter->hw, data->reg_num & 0x1F,
3378                                    &data->val_out)) {
3379                         spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
3380                         return -EIO;
3381                 }
3382                 spin_unlock_irqrestore(&adapter->stats_lock, irq_flags);
3383                 break;
3384         case SIOCSMIIREG:
3385         default:
3386                 return -EOPNOTSUPP;
3387         }
3388         return 0;
3389 }
3390
3391 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
3392 {
3393         switch (cmd) {
3394         case SIOCGMIIPHY:
3395         case SIOCGMIIREG:
3396         case SIOCSMIIREG:
3397                 return e1000_mii_ioctl(netdev, ifr, cmd);
3398         default:
3399                 return -EOPNOTSUPP;
3400         }
3401 }
3402
3403 static int e1000_suspend(struct pci_dev *pdev, pm_message_t state)
3404 {
3405         struct net_device *netdev = pci_get_drvdata(pdev);
3406         struct e1000_adapter *adapter = netdev_priv(netdev);
3407         struct e1000_hw *hw = &adapter->hw;
3408         u32 ctrl, ctrl_ext, rctl, status;
3409         u32 wufc = adapter->wol;
3410         int retval = 0;
3411
3412         netif_device_detach(netdev);
3413
3414         if (netif_running(netdev)) {
3415                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3416                 e1000e_down(adapter);
3417                 e1000_free_irq(adapter);
3418         }
3419
3420         retval = pci_save_state(pdev);
3421         if (retval)
3422                 return retval;
3423
3424         status = er32(STATUS);
3425         if (status & E1000_STATUS_LU)
3426                 wufc &= ~E1000_WUFC_LNKC;
3427
3428         if (wufc) {
3429                 e1000_setup_rctl(adapter);
3430                 e1000_set_multi(netdev);
3431
3432                 /* turn on all-multi mode if wake on multicast is enabled */
3433                 if (wufc & E1000_WUFC_MC) {
3434                         rctl = er32(RCTL);
3435                         rctl |= E1000_RCTL_MPE;
3436                         ew32(RCTL, rctl);
3437                 }
3438
3439                 ctrl = er32(CTRL);
3440                 /* advertise wake from D3Cold */
3441                 #define E1000_CTRL_ADVD3WUC 0x00100000
3442                 /* phy power management enable */
3443                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
3444                 ctrl |= E1000_CTRL_ADVD3WUC |
3445                         E1000_CTRL_EN_PHY_PWR_MGMT;
3446                 ew32(CTRL, ctrl);
3447
3448                 if (adapter->hw.media_type == e1000_media_type_fiber ||
3449                    adapter->hw.media_type == e1000_media_type_internal_serdes) {
3450                         /* keep the laser running in D3 */
3451                         ctrl_ext = er32(CTRL_EXT);
3452                         ctrl_ext |= E1000_CTRL_EXT_SDP7_DATA;
3453                         ew32(CTRL_EXT, ctrl_ext);
3454                 }
3455
3456                 /* Allow time for pending master requests to run */
3457                 e1000e_disable_pcie_master(&adapter->hw);
3458
3459                 ew32(WUC, E1000_WUC_PME_EN);
3460                 ew32(WUFC, wufc);
3461                 pci_enable_wake(pdev, PCI_D3hot, 1);
3462                 pci_enable_wake(pdev, PCI_D3cold, 1);
3463         } else {
3464                 ew32(WUC, 0);
3465                 ew32(WUFC, 0);
3466                 pci_enable_wake(pdev, PCI_D3hot, 0);
3467                 pci_enable_wake(pdev, PCI_D3cold, 0);
3468         }
3469
3470         /* make sure adapter isn't asleep if manageability is enabled */
3471         if (adapter->flags & FLAG_MNG_PT_ENABLED) {
3472                 pci_enable_wake(pdev, PCI_D3hot, 1);
3473                 pci_enable_wake(pdev, PCI_D3cold, 1);
3474         }
3475
3476         if (adapter->hw.phy.type == e1000_phy_igp_3)
3477                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
3478
3479         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
3480          * would have already happened in close and is redundant. */
3481         e1000_release_hw_control(adapter);
3482
3483         pci_disable_device(pdev);
3484
3485         pci_set_power_state(pdev, pci_choose_state(pdev, state));
3486
3487         return 0;
3488 }
3489
3490 static void e1000e_disable_l1aspm(struct pci_dev *pdev)
3491 {
3492         int pos;
3493         u16 val;
3494
3495         /*
3496          * 82573 workaround - disable L1 ASPM on mobile chipsets
3497          *
3498          * L1 ASPM on various mobile (ich7) chipsets do not behave properly
3499          * resulting in lost data or garbage information on the pci-e link
3500          * level. This could result in (false) bad EEPROM checksum errors,
3501          * long ping times (up to 2s) or even a system freeze/hang.
3502          *
3503          * Unfortunately this feature saves about 1W power consumption when
3504          * active.
3505          */
3506         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
3507         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
3508         if (val & 0x2) {
3509                 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
3510                 val &= ~0x2;
3511                 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
3512         }
3513 }
3514
3515 #ifdef CONFIG_PM
3516 static int e1000_resume(struct pci_dev *pdev)
3517 {
3518         struct net_device *netdev = pci_get_drvdata(pdev);
3519         struct e1000_adapter *adapter = netdev_priv(netdev);
3520         struct e1000_hw *hw = &adapter->hw;
3521         u32 err;
3522
3523         pci_set_power_state(pdev, PCI_D0);
3524         pci_restore_state(pdev);
3525         e1000e_disable_l1aspm(pdev);
3526         err = pci_enable_device(pdev);
3527         if (err) {
3528                 dev_err(&pdev->dev,
3529                         "Cannot enable PCI device from suspend\n");
3530                 return err;
3531         }
3532
3533         pci_set_master(pdev);
3534
3535         pci_enable_wake(pdev, PCI_D3hot, 0);
3536         pci_enable_wake(pdev, PCI_D3cold, 0);
3537
3538         if (netif_running(netdev)) {
3539                 err = e1000_request_irq(adapter);
3540                 if (err)
3541                         return err;
3542         }
3543
3544         e1000e_power_up_phy(adapter);
3545         e1000e_reset(adapter);
3546         ew32(WUS, ~0);
3547
3548         e1000_init_manageability(adapter);
3549
3550         if (netif_running(netdev))
3551                 e1000e_up(adapter);
3552
3553         netif_device_attach(netdev);
3554
3555         /* If the controller has AMT, do not set DRV_LOAD until the interface
3556          * is up.  For all other cases, let the f/w know that the h/w is now
3557          * under the control of the driver. */
3558         if (!(adapter->flags & FLAG_HAS_AMT) || !e1000e_check_mng_mode(&adapter->hw))
3559                 e1000_get_hw_control(adapter);
3560
3561         return 0;
3562 }
3563 #endif
3564
3565 static void e1000_shutdown(struct pci_dev *pdev)
3566 {
3567         e1000_suspend(pdev, PMSG_SUSPEND);
3568 }
3569
3570 #ifdef CONFIG_NET_POLL_CONTROLLER
3571 /*
3572  * Polling 'interrupt' - used by things like netconsole to send skbs
3573  * without having to re-enable interrupts. It's not called while
3574  * the interrupt routine is executing.
3575  */
3576 static void e1000_netpoll(struct net_device *netdev)
3577 {
3578         struct e1000_adapter *adapter = netdev_priv(netdev);
3579
3580         disable_irq(adapter->pdev->irq);
3581         e1000_intr(adapter->pdev->irq, netdev);
3582
3583         e1000_clean_tx_irq(adapter);
3584
3585         enable_irq(adapter->pdev->irq);
3586 }
3587 #endif
3588
3589 /**
3590  * e1000_io_error_detected - called when PCI error is detected
3591  * @pdev: Pointer to PCI device
3592  * @state: The current pci connection state
3593  *
3594  * This function is called after a PCI bus error affecting
3595  * this device has been detected.
3596  */
3597 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
3598                                                 pci_channel_state_t state)
3599 {
3600         struct net_device *netdev = pci_get_drvdata(pdev);
3601         struct e1000_adapter *adapter = netdev_priv(netdev);
3602
3603         netif_device_detach(netdev);
3604
3605         if (netif_running(netdev))
3606                 e1000e_down(adapter);
3607         pci_disable_device(pdev);
3608
3609         /* Request a slot slot reset. */
3610         return PCI_ERS_RESULT_NEED_RESET;
3611 }
3612
3613 /**
3614  * e1000_io_slot_reset - called after the pci bus has been reset.
3615  * @pdev: Pointer to PCI device
3616  *
3617  * Restart the card from scratch, as if from a cold-boot. Implementation
3618  * resembles the first-half of the e1000_resume routine.
3619  */
3620 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
3621 {
3622         struct net_device *netdev = pci_get_drvdata(pdev);
3623         struct e1000_adapter *adapter = netdev_priv(netdev);
3624         struct e1000_hw *hw = &adapter->hw;
3625
3626         e1000e_disable_l1aspm(pdev);
3627         if (pci_enable_device(pdev)) {
3628                 dev_err(&pdev->dev,
3629                         "Cannot re-enable PCI device after reset.\n");
3630                 return PCI_ERS_RESULT_DISCONNECT;
3631         }
3632         pci_set_master(pdev);
3633
3634         pci_enable_wake(pdev, PCI_D3hot, 0);
3635         pci_enable_wake(pdev, PCI_D3cold, 0);
3636
3637         e1000e_reset(adapter);
3638         ew32(WUS, ~0);
3639
3640         return PCI_ERS_RESULT_RECOVERED;
3641 }
3642
3643 /**
3644  * e1000_io_resume - called when traffic can start flowing again.
3645  * @pdev: Pointer to PCI device
3646  *
3647  * This callback is called when the error recovery driver tells us that
3648  * its OK to resume normal operation. Implementation resembles the
3649  * second-half of the e1000_resume routine.
3650  */
3651 static void e1000_io_resume(struct pci_dev *pdev)
3652 {
3653         struct net_device *netdev = pci_get_drvdata(pdev);
3654         struct e1000_adapter *adapter = netdev_priv(netdev);
3655
3656         e1000_init_manageability(adapter);
3657
3658         if (netif_running(netdev)) {
3659                 if (e1000e_up(adapter)) {
3660                         dev_err(&pdev->dev,
3661                                 "can't bring device back up after reset\n");
3662                         return;
3663                 }
3664         }
3665
3666         netif_device_attach(netdev);
3667
3668         /* If the controller has AMT, do not set DRV_LOAD until the interface
3669          * is up.  For all other cases, let the f/w know that the h/w is now
3670          * under the control of the driver. */
3671         if (!(adapter->flags & FLAG_HAS_AMT) ||
3672             !e1000e_check_mng_mode(&adapter->hw))
3673                 e1000_get_hw_control(adapter);
3674
3675 }
3676
3677 static void e1000_print_device_info(struct e1000_adapter *adapter)
3678 {
3679         struct e1000_hw *hw = &adapter->hw;
3680         struct net_device *netdev = adapter->netdev;
3681         u32 part_num;
3682
3683         /* print bus type/speed/width info */
3684         ndev_info(netdev, "(PCI Express:2.5GB/s:%s) "
3685                   "%02x:%02x:%02x:%02x:%02x:%02x\n",
3686                   /* bus width */
3687                  ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
3688                   "Width x1"),
3689                   /* MAC address */
3690                   netdev->dev_addr[0], netdev->dev_addr[1],
3691                   netdev->dev_addr[2], netdev->dev_addr[3],
3692                   netdev->dev_addr[4], netdev->dev_addr[5]);
3693         ndev_info(netdev, "Intel(R) PRO/%s Network Connection\n",
3694                   (hw->phy.type == e1000_phy_ife)
3695                    ? "10/100" : "1000");
3696         e1000e_read_part_num(hw, &part_num);
3697         ndev_info(netdev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
3698                   hw->mac.type, hw->phy.type,
3699                   (part_num >> 8), (part_num & 0xff));
3700 }
3701
3702 /**
3703  * e1000_probe - Device Initialization Routine
3704  * @pdev: PCI device information struct
3705  * @ent: entry in e1000_pci_tbl
3706  *
3707  * Returns 0 on success, negative on failure
3708  *
3709  * e1000_probe initializes an adapter identified by a pci_dev structure.
3710  * The OS initialization, configuring of the adapter private structure,
3711  * and a hardware reset occur.
3712  **/
3713 static int __devinit e1000_probe(struct pci_dev *pdev,
3714                                  const struct pci_device_id *ent)
3715 {
3716         struct net_device *netdev;
3717         struct e1000_adapter *adapter;
3718         struct e1000_hw *hw;
3719         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
3720         unsigned long mmio_start, mmio_len;
3721         unsigned long flash_start, flash_len;
3722
3723         static int cards_found;
3724         int i, err, pci_using_dac;
3725         u16 eeprom_data = 0;
3726         u16 eeprom_apme_mask = E1000_EEPROM_APME;
3727
3728         e1000e_disable_l1aspm(pdev);
3729         err = pci_enable_device(pdev);
3730         if (err)
3731                 return err;
3732
3733         pci_using_dac = 0;
3734         err = pci_set_dma_mask(pdev, DMA_64BIT_MASK);
3735         if (!err) {
3736                 err = pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK);
3737                 if (!err)
3738                         pci_using_dac = 1;
3739         } else {
3740                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3741                 if (err) {
3742                         err = pci_set_consistent_dma_mask(pdev,
3743                                                           DMA_32BIT_MASK);
3744                         if (err) {
3745                                 dev_err(&pdev->dev, "No usable DMA "
3746                                         "configuration, aborting\n");
3747                                 goto err_dma;
3748                         }
3749                 }
3750         }
3751
3752         err = pci_request_regions(pdev, e1000e_driver_name);
3753         if (err)
3754                 goto err_pci_reg;
3755
3756         pci_set_master(pdev);
3757
3758         err = -ENOMEM;
3759         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
3760         if (!netdev)
3761                 goto err_alloc_etherdev;
3762
3763         SET_NETDEV_DEV(netdev, &pdev->dev);
3764
3765         pci_set_drvdata(pdev, netdev);
3766         adapter = netdev_priv(netdev);
3767         hw = &adapter->hw;
3768         adapter->netdev = netdev;
3769         adapter->pdev = pdev;
3770         adapter->ei = ei;
3771         adapter->pba = ei->pba;
3772         adapter->flags = ei->flags;
3773         adapter->hw.adapter = adapter;
3774         adapter->hw.mac.type = ei->mac;
3775         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
3776
3777         mmio_start = pci_resource_start(pdev, 0);
3778         mmio_len = pci_resource_len(pdev, 0);
3779
3780         err = -EIO;
3781         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
3782         if (!adapter->hw.hw_addr)
3783                 goto err_ioremap;
3784
3785         if ((adapter->flags & FLAG_HAS_FLASH) &&
3786             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
3787                 flash_start = pci_resource_start(pdev, 1);
3788                 flash_len = pci_resource_len(pdev, 1);
3789                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
3790                 if (!adapter->hw.flash_address)
3791                         goto err_flashmap;
3792         }
3793
3794         /* construct the net_device struct */
3795         netdev->open                    = &e1000_open;
3796         netdev->stop                    = &e1000_close;
3797         netdev->hard_start_xmit         = &e1000_xmit_frame;
3798         netdev->get_stats               = &e1000_get_stats;
3799         netdev->set_multicast_list      = &e1000_set_multi;
3800         netdev->set_mac_address         = &e1000_set_mac;
3801         netdev->change_mtu              = &e1000_change_mtu;
3802         netdev->do_ioctl                = &e1000_ioctl;
3803         e1000e_set_ethtool_ops(netdev);
3804         netdev->tx_timeout              = &e1000_tx_timeout;
3805         netdev->watchdog_timeo          = 5 * HZ;
3806         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
3807         netdev->vlan_rx_register        = e1000_vlan_rx_register;
3808         netdev->vlan_rx_add_vid         = e1000_vlan_rx_add_vid;
3809         netdev->vlan_rx_kill_vid        = e1000_vlan_rx_kill_vid;
3810 #ifdef CONFIG_NET_POLL_CONTROLLER
3811         netdev->poll_controller         = e1000_netpoll;
3812 #endif
3813         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
3814
3815         netdev->mem_start = mmio_start;
3816         netdev->mem_end = mmio_start + mmio_len;
3817
3818         adapter->bd_number = cards_found++;
3819
3820         /* setup adapter struct */
3821         err = e1000_sw_init(adapter);
3822         if (err)
3823                 goto err_sw_init;
3824
3825         err = -EIO;
3826
3827         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
3828         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
3829         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
3830
3831         err = ei->get_invariants(adapter);
3832         if (err)
3833                 goto err_hw_init;
3834
3835         hw->mac.ops.get_bus_info(&adapter->hw);
3836
3837         adapter->hw.phy.wait_for_link = 0;
3838
3839         /* Copper options */
3840         if (adapter->hw.media_type == e1000_media_type_copper) {
3841                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
3842                 adapter->hw.phy.disable_polarity_correction = 0;
3843                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
3844         }
3845
3846         if (e1000_check_reset_block(&adapter->hw))
3847                 ndev_info(netdev,
3848                           "PHY reset is blocked due to SOL/IDER session.\n");
3849
3850         netdev->features = NETIF_F_SG |
3851                            NETIF_F_HW_CSUM |
3852                            NETIF_F_HW_VLAN_TX |
3853                            NETIF_F_HW_VLAN_RX;
3854
3855         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
3856                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
3857
3858         netdev->features |= NETIF_F_TSO;
3859         netdev->features |= NETIF_F_TSO6;
3860
3861         if (pci_using_dac)
3862                 netdev->features |= NETIF_F_HIGHDMA;
3863
3864         /* We should not be using LLTX anymore, but we are still TX faster with
3865          * it. */
3866         netdev->features |= NETIF_F_LLTX;
3867
3868         if (e1000e_enable_mng_pass_thru(&adapter->hw))
3869                 adapter->flags |= FLAG_MNG_PT_ENABLED;
3870
3871         /* before reading the NVM, reset the controller to
3872          * put the device in a known good starting state */
3873         adapter->hw.mac.ops.reset_hw(&adapter->hw);
3874
3875         /*
3876          * systems with ASPM and others may see the checksum fail on the first
3877          * attempt. Let's give it a few tries
3878          */
3879         for (i = 0;; i++) {
3880                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
3881                         break;
3882                 if (i == 2) {
3883                         ndev_err(netdev, "The NVM Checksum Is Not Valid\n");
3884                         err = -EIO;
3885                         goto err_eeprom;
3886                 }
3887         }
3888
3889         /* copy the MAC address out of the NVM */
3890         if (e1000e_read_mac_addr(&adapter->hw))
3891                 ndev_err(netdev, "NVM Read Error while reading MAC address\n");
3892
3893         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
3894         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
3895
3896         if (!is_valid_ether_addr(netdev->perm_addr)) {
3897                 ndev_err(netdev, "Invalid MAC Address: "
3898                          "%02x:%02x:%02x:%02x:%02x:%02x\n",
3899                          netdev->perm_addr[0], netdev->perm_addr[1],
3900                          netdev->perm_addr[2], netdev->perm_addr[3],
3901                          netdev->perm_addr[4], netdev->perm_addr[5]);
3902                 err = -EIO;
3903                 goto err_eeprom;
3904         }
3905
3906         init_timer(&adapter->watchdog_timer);
3907         adapter->watchdog_timer.function = &e1000_watchdog;
3908         adapter->watchdog_timer.data = (unsigned long) adapter;
3909
3910         init_timer(&adapter->phy_info_timer);
3911         adapter->phy_info_timer.function = &e1000_update_phy_info;
3912         adapter->phy_info_timer.data = (unsigned long) adapter;
3913
3914         INIT_WORK(&adapter->reset_task, e1000_reset_task);
3915         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
3916
3917         e1000e_check_options(adapter);
3918
3919         /* Initialize link parameters. User can change them with ethtool */
3920         adapter->hw.mac.autoneg = 1;
3921         adapter->fc_autoneg = 1;
3922         adapter->hw.mac.original_fc = e1000_fc_default;
3923         adapter->hw.mac.fc = e1000_fc_default;
3924         adapter->hw.phy.autoneg_advertised = 0x2f;
3925
3926         /* ring size defaults */
3927         adapter->rx_ring->count = 256;
3928         adapter->tx_ring->count = 256;
3929
3930         /*
3931          * Initial Wake on LAN setting - If APM wake is enabled in
3932          * the EEPROM, enable the ACPI Magic Packet filter
3933          */
3934         if (adapter->flags & FLAG_APME_IN_WUC) {
3935                 /* APME bit in EEPROM is mapped to WUC.APME */
3936                 eeprom_data = er32(WUC);
3937                 eeprom_apme_mask = E1000_WUC_APME;
3938         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
3939                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
3940                     (adapter->hw.bus.func == 1))
3941                         e1000_read_nvm(&adapter->hw,
3942                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
3943                 else
3944                         e1000_read_nvm(&adapter->hw,
3945                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
3946         }
3947
3948         /* fetch WoL from EEPROM */
3949         if (eeprom_data & eeprom_apme_mask)
3950                 adapter->eeprom_wol |= E1000_WUFC_MAG;
3951
3952         /*
3953          * now that we have the eeprom settings, apply the special cases
3954          * where the eeprom may be wrong or the board simply won't support
3955          * wake on lan on a particular port
3956          */
3957         if (!(adapter->flags & FLAG_HAS_WOL))
3958                 adapter->eeprom_wol = 0;
3959
3960         /* initialize the wol settings based on the eeprom settings */
3961         adapter->wol = adapter->eeprom_wol;
3962
3963         /* reset the hardware with the new settings */
3964         e1000e_reset(adapter);
3965
3966         /* If the controller has AMT, do not set DRV_LOAD until the interface
3967          * is up.  For all other cases, let the f/w know that the h/w is now
3968          * under the control of the driver. */
3969         if (!(adapter->flags & FLAG_HAS_AMT) ||
3970             !e1000e_check_mng_mode(&adapter->hw))
3971                 e1000_get_hw_control(adapter);
3972
3973         /* tell the stack to leave us alone until e1000_open() is called */
3974         netif_carrier_off(netdev);
3975         netif_stop_queue(netdev);
3976
3977         strcpy(netdev->name, "eth%d");
3978         err = register_netdev(netdev);
3979         if (err)
3980                 goto err_register;
3981
3982         e1000_print_device_info(adapter);
3983
3984         return 0;
3985
3986 err_register:
3987 err_hw_init:
3988         e1000_release_hw_control(adapter);
3989 err_eeprom:
3990         if (!e1000_check_reset_block(&adapter->hw))
3991                 e1000_phy_hw_reset(&adapter->hw);
3992
3993         if (adapter->hw.flash_address)
3994                 iounmap(adapter->hw.flash_address);
3995
3996 err_flashmap:
3997         kfree(adapter->tx_ring);
3998         kfree(adapter->rx_ring);
3999 err_sw_init:
4000         iounmap(adapter->hw.hw_addr);
4001 err_ioremap:
4002         free_netdev(netdev);
4003 err_alloc_etherdev:
4004         pci_release_regions(pdev);
4005 err_pci_reg:
4006 err_dma:
4007         pci_disable_device(pdev);
4008         return err;
4009 }
4010
4011 /**
4012  * e1000_remove - Device Removal Routine
4013  * @pdev: PCI device information struct
4014  *
4015  * e1000_remove is called by the PCI subsystem to alert the driver
4016  * that it should release a PCI device.  The could be caused by a
4017  * Hot-Plug event, or because the driver is going to be removed from
4018  * memory.
4019  **/
4020 static void __devexit e1000_remove(struct pci_dev *pdev)
4021 {
4022         struct net_device *netdev = pci_get_drvdata(pdev);
4023         struct e1000_adapter *adapter = netdev_priv(netdev);
4024
4025         /* flush_scheduled work may reschedule our watchdog task, so
4026          * explicitly disable watchdog tasks from being rescheduled  */
4027         set_bit(__E1000_DOWN, &adapter->state);
4028         del_timer_sync(&adapter->watchdog_timer);
4029         del_timer_sync(&adapter->phy_info_timer);
4030
4031         flush_scheduled_work();
4032
4033         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
4034          * would have already happened in close and is redundant. */
4035         e1000_release_hw_control(adapter);
4036
4037         unregister_netdev(netdev);
4038
4039         if (!e1000_check_reset_block(&adapter->hw))
4040                 e1000_phy_hw_reset(&adapter->hw);
4041
4042         kfree(adapter->tx_ring);
4043         kfree(adapter->rx_ring);
4044
4045         iounmap(adapter->hw.hw_addr);
4046         if (adapter->hw.flash_address)
4047                 iounmap(adapter->hw.flash_address);
4048         pci_release_regions(pdev);
4049
4050         free_netdev(netdev);
4051
4052         pci_disable_device(pdev);
4053 }
4054
4055 /* PCI Error Recovery (ERS) */
4056 static struct pci_error_handlers e1000_err_handler = {
4057         .error_detected = e1000_io_error_detected,
4058         .slot_reset = e1000_io_slot_reset,
4059         .resume = e1000_io_resume,
4060 };
4061
4062 static struct pci_device_id e1000_pci_tbl[] = {
4063         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
4064         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
4065         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
4066         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
4067         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
4068         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
4069         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
4070         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
4071         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
4072         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
4073         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
4074         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
4075         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
4076         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
4077         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
4078         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
4079         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
4080           board_80003es2lan },
4081         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
4082           board_80003es2lan },
4083         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
4084           board_80003es2lan },
4085         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
4086           board_80003es2lan },
4087         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
4088         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
4089         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
4090         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
4091         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
4092         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
4093         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
4094         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
4095         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
4096         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
4097         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
4098         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
4099
4100         { }     /* terminate list */
4101 };
4102 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
4103
4104 /* PCI Device API Driver */
4105 static struct pci_driver e1000_driver = {
4106         .name     = e1000e_driver_name,
4107         .id_table = e1000_pci_tbl,
4108         .probe    = e1000_probe,
4109         .remove   = __devexit_p(e1000_remove),
4110 #ifdef CONFIG_PM
4111         /* Power Managment Hooks */
4112         .suspend  = e1000_suspend,
4113         .resume   = e1000_resume,
4114 #endif
4115         .shutdown = e1000_shutdown,
4116         .err_handler = &e1000_err_handler
4117 };
4118
4119 /**
4120  * e1000_init_module - Driver Registration Routine
4121  *
4122  * e1000_init_module is the first routine called when the driver is
4123  * loaded. All it does is register with the PCI subsystem.
4124  **/
4125 static int __init e1000_init_module(void)
4126 {
4127         int ret;
4128         printk(KERN_INFO "%s: Intel(R) PRO/1000 Network Driver - %s\n",
4129                e1000e_driver_name, e1000e_driver_version);
4130         printk(KERN_INFO "%s: Copyright (c) 1999-2007 Intel Corporation.\n",
4131                e1000e_driver_name);
4132         ret = pci_register_driver(&e1000_driver);
4133
4134         return ret;
4135 }
4136 module_init(e1000_init_module);
4137
4138 /**
4139  * e1000_exit_module - Driver Exit Cleanup Routine
4140  *
4141  * e1000_exit_module is called just before the driver is removed
4142  * from memory.
4143  **/
4144 static void __exit e1000_exit_module(void)
4145 {
4146         pci_unregister_driver(&e1000_driver);
4147 }
4148 module_exit(e1000_exit_module);
4149
4150
4151 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
4152 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
4153 MODULE_LICENSE("GPL");
4154 MODULE_VERSION(DRV_VERSION);
4155
4156 /* e1000_main.c */