drivers/net/e1000e/netdev.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2009 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/pagemap.h>
  37 #include <linux/delay.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/tcp.h>
  40 #include <linux/ipv6.h>
  41 #include <linux/slab.h>
  42 #include <net/checksum.h>
  43 #include <net/ip6_checksum.h>
  44 #include <linux/mii.h>
  45 #include <linux/ethtool.h>
  46 #include <linux/if_vlan.h>
  47 #include <linux/cpu.h>
  48 #include <linux/smp.h>
  49 #include <linux/pm_qos_params.h>
  50 #include <linux/pm_runtime.h>
  51 #include <linux/aer.h>
  52
  53 #include "e1000.h"
  54
  55 #define DRV_VERSION "1.0.2-k2"
  56 char e1000e_driver_name[] = "e1000e";
  57 const char e1000e_driver_version[] = DRV_VERSION;
  58
  59 static const struct e1000_info *e1000_info_tbl[] = {
  60         [board_82571]           = &e1000_82571_info,
  61         [board_82572]           = &e1000_82572_info,
  62         [board_82573]           = &e1000_82573_info,
  63         [board_82574]           = &e1000_82574_info,
  64         [board_82583]           = &e1000_82583_info,
  65         [board_80003es2lan]     = &e1000_es2_info,
  66         [board_ich8lan]         = &e1000_ich8_info,
  67         [board_ich9lan]         = &e1000_ich9_info,
  68         [board_ich10lan]        = &e1000_ich10_info,
  69         [board_pchlan]          = &e1000_pch_info,
  70 };
  71
  72 /**
  73  * e1000_desc_unused - calculate if we have unused descriptors
  74  **/
  75 static int e1000_desc_unused(struct e1000_ring *ring)
  76 {
  77         if (ring->next_to_clean > ring->next_to_use)
  78                 return ring->next_to_clean - ring->next_to_use - 1;
  79
  80         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
  81 }
  82
  83 /**
  84  * e1000_receive_skb - helper function to handle Rx indications
  85  * @adapter: board private structure
  86  * @status: descriptor status field as written by hardware
  87  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
  88  * @skb: pointer to sk_buff to be indicated to stack
  89  **/
  90 static void e1000_receive_skb(struct e1000_adapter *adapter,
  91                               struct net_device *netdev,
  92                               struct sk_buff *skb,
  93                               u8 status, __le16 vlan)
  94 {
  95         skb->protocol = eth_type_trans(skb, netdev);
  96
  97         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
  98                 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
  99                                  le16_to_cpu(vlan), skb);
 100         else
 101                 napi_gro_receive(&adapter->napi, skb);
 102 }
 103
 104 /**
 105  * e1000_rx_checksum - Receive Checksum Offload for 82543
 106  * @adapter:     board private structure
 107  * @status_err:  receive descriptor status and error fields
 108  * @csum:       receive descriptor csum field
 109  * @sk_buff:     socket buffer with received data
 110  **/
 111 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 112                               u32 csum, struct sk_buff *skb)
 113 {
 114         u16 status = (u16)status_err;
 115         u8 errors = (u8)(status_err >> 24);
 116         skb->ip_summed = CHECKSUM_NONE;
 117
 118         /* Ignore Checksum bit is set */
 119         if (status & E1000_RXD_STAT_IXSM)
 120                 return;
 121         /* TCP/UDP checksum error bit is set */
 122         if (errors & E1000_RXD_ERR_TCPE) {
 123                 /* let the stack verify checksum errors */
 124                 adapter->hw_csum_err++;
 125                 return;
 126         }
 127
 128         /* TCP/UDP Checksum has not been calculated */
 129         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 130                 return;
 131
 132         /* It must be a TCP or UDP packet with a valid checksum */
 133         if (status & E1000_RXD_STAT_TCPCS) {
 134                 /* TCP checksum is good */
 135                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 136         } else {
 137                 /*
 138                  * IP fragment with UDP payload
 139                  * Hardware complements the payload checksum, so we undo it
 140                  * and then put the value in host order for further stack use.
 141                  */
 142                 __sum16 sum = (__force __sum16)htons(csum);
 143                 skb->csum = csum_unfold(~sum);
 144                 skb->ip_summed = CHECKSUM_COMPLETE;
 145         }
 146         adapter->hw_csum_good++;
 147 }
 148
 149 /**
 150  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 151  * @adapter: address of board private structure
 152  **/
 153 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 154                                    int cleaned_count)
 155 {
 156         struct net_device *netdev = adapter->netdev;
 157         struct pci_dev *pdev = adapter->pdev;
 158         struct e1000_ring *rx_ring = adapter->rx_ring;
 159         struct e1000_rx_desc *rx_desc;
 160         struct e1000_buffer *buffer_info;
 161         struct sk_buff *skb;
 162         unsigned int i;
 163         unsigned int bufsz = adapter->rx_buffer_len;
 164
 165         i = rx_ring->next_to_use;
 166         buffer_info = &rx_ring->buffer_info[i];
 167
 168         while (cleaned_count--) {
 169                 skb = buffer_info->skb;
 170                 if (skb) {
 171                         skb_trim(skb, 0);
 172                         goto map_skb;
 173                 }
 174
 175                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 176                 if (!skb) {
 177                         /* Better luck next round */
 178                         adapter->alloc_rx_buff_failed++;
 179                         break;
 180                 }
 181
 182                 buffer_info->skb = skb;
 183 map_skb:
 184                 buffer_info->dma = pci_map_single(pdev, skb->data,
 185                                                   adapter->rx_buffer_len,
 186                                                   PCI_DMA_FROMDEVICE);
 187                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 188                         dev_err(&pdev->dev, "RX DMA map failed\n");
 189                         adapter->rx_dma_failed++;
 190                         break;
 191                 }
 192
 193                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 194                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 195
 196                 i++;
 197                 if (i == rx_ring->count)
 198                         i = 0;
 199                 buffer_info = &rx_ring->buffer_info[i];
 200         }
 201
 202         if (rx_ring->next_to_use != i) {
 203                 rx_ring->next_to_use = i;
 204                 if (i-- == 0)
 205                         i = (rx_ring->count - 1);
 206
 207                 /*
 208                  * Force memory writes to complete before letting h/w
 209                  * know there are new descriptors to fetch.  (Only
 210                  * applicable for weak-ordered memory model archs,
 211                  * such as IA-64).
 212                  */
 213                 wmb();
 214                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 215         }
 216 }
 217
 218 /**
 219  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 220  * @adapter: address of board private structure
 221  **/
 222 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 223                                       int cleaned_count)
 224 {
 225         struct net_device *netdev = adapter->netdev;
 226         struct pci_dev *pdev = adapter->pdev;
 227         union e1000_rx_desc_packet_split *rx_desc;
 228         struct e1000_ring *rx_ring = adapter->rx_ring;
 229         struct e1000_buffer *buffer_info;
 230         struct e1000_ps_page *ps_page;
 231         struct sk_buff *skb;
 232         unsigned int i, j;
 233
 234         i = rx_ring->next_to_use;
 235         buffer_info = &rx_ring->buffer_info[i];
 236
 237         while (cleaned_count--) {
 238                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 239
 240                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 241                         ps_page = &buffer_info->ps_pages[j];
 242                         if (j >= adapter->rx_ps_pages) {
 243                                 /* all unused desc entries get hw null ptr */
 244                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 245                                 continue;
 246                         }
 247                         if (!ps_page->page) {
 248                                 ps_page->page = alloc_page(GFP_ATOMIC);
 249                                 if (!ps_page->page) {
 250                                         adapter->alloc_rx_buff_failed++;
 251                                         goto no_buffers;
 252                                 }
 253                                 ps_page->dma = pci_map_page(pdev,
 254                                                    ps_page->page,
 255                                                    0, PAGE_SIZE,
 256                                                    PCI_DMA_FROMDEVICE);
 257                                 if (pci_dma_mapping_error(pdev, ps_page->dma)) {
 258                                         dev_err(&adapter->pdev->dev,
 259                                           "RX DMA page map failed\n");
 260                                         adapter->rx_dma_failed++;
 261                                         goto no_buffers;
 262                                 }
 263                         }
 264                         /*
 265                          * Refresh the desc even if buffer_addrs
 266                          * didn't change because each write-back
 267                          * erases this info.
 268                          */
 269                         rx_desc->read.buffer_addr[j+1] =
 270                              cpu_to_le64(ps_page->dma);
 271                 }
 272
 273                 skb = netdev_alloc_skb_ip_align(netdev,
 274                                                 adapter->rx_ps_bsize0);
 275
 276                 if (!skb) {
 277                         adapter->alloc_rx_buff_failed++;
 278                         break;
 279                 }
 280
 281                 buffer_info->skb = skb;
 282                 buffer_info->dma = pci_map_single(pdev, skb->data,
 283                                                   adapter->rx_ps_bsize0,
 284                                                   PCI_DMA_FROMDEVICE);
 285                 if (pci_dma_mapping_error(pdev, buffer_info->dma)) {
 286                         dev_err(&pdev->dev, "RX DMA map failed\n");
 287                         adapter->rx_dma_failed++;
 288                         /* cleanup skb */
 289                         dev_kfree_skb_any(skb);
 290                         buffer_info->skb = NULL;
 291                         break;
 292                 }
 293
 294                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 295
 296                 i++;
 297                 if (i == rx_ring->count)
 298                         i = 0;
 299                 buffer_info = &rx_ring->buffer_info[i];
 300         }
 301
 302 no_buffers:
 303         if (rx_ring->next_to_use != i) {
 304                 rx_ring->next_to_use = i;
 305
 306                 if (!(i--))
 307                         i = (rx_ring->count - 1);
 308
 309                 /*
 310                  * Force memory writes to complete before letting h/w
 311                  * know there are new descriptors to fetch.  (Only
 312                  * applicable for weak-ordered memory model archs,
 313                  * such as IA-64).
 314                  */
 315                 wmb();
 316                 /*
 317                  * Hardware increments by 16 bytes, but packet split
 318                  * descriptors are 32 bytes...so we increment tail
 319                  * twice as much.
 320                  */
 321                 writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 322         }
 323 }
 324
 325 /**
 326  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 327  * @adapter: address of board private structure
 328  * @cleaned_count: number of buffers to allocate this pass
 329  **/
 330
 331 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 332                                          int cleaned_count)
 333 {
 334         struct net_device *netdev = adapter->netdev;
 335         struct pci_dev *pdev = adapter->pdev;
 336         struct e1000_rx_desc *rx_desc;
 337         struct e1000_ring *rx_ring = adapter->rx_ring;
 338         struct e1000_buffer *buffer_info;
 339         struct sk_buff *skb;
 340         unsigned int i;
 341         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 342
 343         i = rx_ring->next_to_use;
 344         buffer_info = &rx_ring->buffer_info[i];
 345
 346         while (cleaned_count--) {
 347                 skb = buffer_info->skb;
 348                 if (skb) {
 349                         skb_trim(skb, 0);
 350                         goto check_page;
 351                 }
 352
 353                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 354                 if (unlikely(!skb)) {
 355                         /* Better luck next round */
 356                         adapter->alloc_rx_buff_failed++;
 357                         break;
 358                 }
 359
 360                 buffer_info->skb = skb;
 361 check_page:
 362                 /* allocate a new page if necessary */
 363                 if (!buffer_info->page) {
 364                         buffer_info->page = alloc_page(GFP_ATOMIC);
 365                         if (unlikely(!buffer_info->page)) {
 366                                 adapter->alloc_rx_buff_failed++;
 367                                 break;
 368                         }
 369                 }
 370
 371                 if (!buffer_info->dma)
 372                         buffer_info->dma = pci_map_page(pdev,
 373                                                         buffer_info->page, 0,
 374                                                         PAGE_SIZE,
 375                                                         PCI_DMA_FROMDEVICE);
 376
 377                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 378                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 379
 380                 if (unlikely(++i == rx_ring->count))
 381                         i = 0;
 382                 buffer_info = &rx_ring->buffer_info[i];
 383         }
 384
 385         if (likely(rx_ring->next_to_use != i)) {
 386                 rx_ring->next_to_use = i;
 387                 if (unlikely(i-- == 0))
 388                         i = (rx_ring->count - 1);
 389
 390                 /* Force memory writes to complete before letting h/w
 391                  * know there are new descriptors to fetch.  (Only
 392                  * applicable for weak-ordered memory model archs,
 393                  * such as IA-64). */
 394                 wmb();
 395                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 396         }
 397 }
 398
 399 /**
 400  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 401  * @adapter: board private structure
 402  *
 403  * the return value indicates whether actual cleaning was done, there
 404  * is no guarantee that everything was cleaned
 405  **/
 406 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 407                                int *work_done, int work_to_do)
 408 {
 409         struct net_device *netdev = adapter->netdev;
 410         struct pci_dev *pdev = adapter->pdev;
 411         struct e1000_hw *hw = &adapter->hw;
 412         struct e1000_ring *rx_ring = adapter->rx_ring;
 413         struct e1000_rx_desc *rx_desc, *next_rxd;
 414         struct e1000_buffer *buffer_info, *next_buffer;
 415         u32 length;
 416         unsigned int i;
 417         int cleaned_count = 0;
 418         bool cleaned = 0;
 419         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 420
 421         i = rx_ring->next_to_clean;
 422         rx_desc = E1000_RX_DESC(*rx_ring, i);
 423         buffer_info = &rx_ring->buffer_info[i];
 424
 425         while (rx_desc->status & E1000_RXD_STAT_DD) {
 426                 struct sk_buff *skb;
 427                 u8 status;
 428
 429                 if (*work_done >= work_to_do)
 430                         break;
 431                 (*work_done)++;
 432
 433                 status = rx_desc->status;
 434                 skb = buffer_info->skb;
 435                 buffer_info->skb = NULL;
 436
 437                 prefetch(skb->data - NET_IP_ALIGN);
 438
 439                 i++;
 440                 if (i == rx_ring->count)
 441                         i = 0;
 442                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 443                 prefetch(next_rxd);
 444
 445                 next_buffer = &rx_ring->buffer_info[i];
 446
 447                 cleaned = 1;
 448                 cleaned_count++;
 449                 pci_unmap_single(pdev,
 450                                  buffer_info->dma,
 451                                  adapter->rx_buffer_len,
 452                                  PCI_DMA_FROMDEVICE);
 453                 buffer_info->dma = 0;
 454
 455                 length = le16_to_cpu(rx_desc->length);
 456
 457                 /*
 458                  * !EOP means multiple descriptors were used to store a single
 459                  * packet, if that's the case we need to toss it.  In fact, we
 460                  * need to toss every packet with the EOP bit clear and the
 461                  * next frame that _does_ have the EOP bit set, as it is by
 462                  * definition only a frame fragment
 463                  */
 464                 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
 465                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 466
 467                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 468                         /* All receives must fit into a single buffer */
 469                         e_dbg("Receive packet consumed multiple buffers\n");
 470                         /* recycle */
 471                         buffer_info->skb = skb;
 472                         if (status & E1000_RXD_STAT_EOP)
 473                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 474                         goto next_desc;
 475                 }
 476
 477                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 478                         /* recycle */
 479                         buffer_info->skb = skb;
 480                         goto next_desc;
 481                 }
 482
 483                 /* adjust length to remove Ethernet CRC */
 484                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 485                         length -= 4;
 486
 487                 total_rx_bytes += length;
 488                 total_rx_packets++;
 489
 490                 /*
 491                  * code added for copybreak, this should improve
 492                  * performance for small packets with large amounts
 493                  * of reassembly being done in the stack
 494                  */
 495                 if (length < copybreak) {
 496                         struct sk_buff *new_skb =
 497                             netdev_alloc_skb_ip_align(netdev, length);
 498                         if (new_skb) {
 499                                 skb_copy_to_linear_data_offset(new_skb,
 500                                                                -NET_IP_ALIGN,
 501                                                                (skb->data -
 502                                                                 NET_IP_ALIGN),
 503                                                                (length +
 504                                                                 NET_IP_ALIGN));
 505                                 /* save the skb in buffer_info as good */
 506                                 buffer_info->skb = skb;
 507                                 skb = new_skb;
 508                         }
 509                         /* else just continue with the old one */
 510                 }
 511                 /* end copybreak code */
 512                 skb_put(skb, length);
 513
 514                 /* Receive Checksum Offload */
 515                 e1000_rx_checksum(adapter,
 516                                   (u32)(status) |
 517                                   ((u32)(rx_desc->errors) << 24),
 518                                   le16_to_cpu(rx_desc->csum), skb);
 519
 520                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 521
 522 next_desc:
 523                 rx_desc->status = 0;
 524
 525                 /* return some buffers to hardware, one at a time is too slow */
 526                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 527                         adapter->alloc_rx_buf(adapter, cleaned_count);
 528                         cleaned_count = 0;
 529                 }
 530
 531                 /* use prefetched values */
 532                 rx_desc = next_rxd;
 533                 buffer_info = next_buffer;
 534         }
 535         rx_ring->next_to_clean = i;
 536
 537         cleaned_count = e1000_desc_unused(rx_ring);
 538         if (cleaned_count)
 539                 adapter->alloc_rx_buf(adapter, cleaned_count);
 540
 541         adapter->total_rx_bytes += total_rx_bytes;
 542         adapter->total_rx_packets += total_rx_packets;
 543         netdev->stats.rx_bytes += total_rx_bytes;
 544         netdev->stats.rx_packets += total_rx_packets;
 545         return cleaned;
 546 }
 547
 548 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 549                              struct e1000_buffer *buffer_info)
 550 {
 551         if (buffer_info->dma) {
 552                 if (buffer_info->mapped_as_page)
 553                         pci_unmap_page(adapter->pdev, buffer_info->dma,
 554                                        buffer_info->length, PCI_DMA_TODEVICE);
 555                 else
 556                         pci_unmap_single(adapter->pdev, buffer_info->dma,
 557                                          buffer_info->length,
 558                                          PCI_DMA_TODEVICE);
 559                 buffer_info->dma = 0;
 560         }
 561         if (buffer_info->skb) {
 562                 dev_kfree_skb_any(buffer_info->skb);
 563                 buffer_info->skb = NULL;
 564         }
 565         buffer_info->time_stamp = 0;
 566 }
 567
 568 static void e1000_print_hw_hang(struct work_struct *work)
 569 {
 570         struct e1000_adapter *adapter = container_of(work,
 571                                                      struct e1000_adapter,
 572                                                      print_hang_task);
 573         struct e1000_ring *tx_ring = adapter->tx_ring;
 574         unsigned int i = tx_ring->next_to_clean;
 575         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 576         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 577         struct e1000_hw *hw = &adapter->hw;
 578         u16 phy_status, phy_1000t_status, phy_ext_status;
 579         u16 pci_status;
 580
 581         e1e_rphy(hw, PHY_STATUS, &phy_status);
 582         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
 583         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
 584
 585         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
 586
 587         /* detected Hardware unit hang */
 588         e_err("Detected Hardware Unit Hang:\n"
 589               "  TDH                  <%x>\n"
 590               "  TDT                  <%x>\n"
 591               "  next_to_use          <%x>\n"
 592               "  next_to_clean        <%x>\n"
 593               "buffer_info[next_to_clean]:\n"
 594               "  time_stamp           <%lx>\n"
 595               "  next_to_watch        <%x>\n"
 596               "  jiffies              <%lx>\n"
 597               "  next_to_watch.status <%x>\n"
 598               "MAC Status             <%x>\n"
 599               "PHY Status             <%x>\n"
 600               "PHY 1000BASE-T Status  <%x>\n"
 601               "PHY Extended Status    <%x>\n"
 602               "PCI Status             <%x>\n",
 603               readl(adapter->hw.hw_addr + tx_ring->head),
 604               readl(adapter->hw.hw_addr + tx_ring->tail),
 605               tx_ring->next_to_use,
 606               tx_ring->next_to_clean,
 607               tx_ring->buffer_info[eop].time_stamp,
 608               eop,
 609               jiffies,
 610               eop_desc->upper.fields.status,
 611               er32(STATUS),
 612               phy_status,
 613               phy_1000t_status,
 614               phy_ext_status,
 615               pci_status);
 616 }
 617
 618 /**
 619  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 620  * @adapter: board private structure
 621  *
 622  * the return value indicates whether actual cleaning was done, there
 623  * is no guarantee that everything was cleaned
 624  **/
 625 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 626 {
 627         struct net_device *netdev = adapter->netdev;
 628         struct e1000_hw *hw = &adapter->hw;
 629         struct e1000_ring *tx_ring = adapter->tx_ring;
 630         struct e1000_tx_desc *tx_desc, *eop_desc;
 631         struct e1000_buffer *buffer_info;
 632         unsigned int i, eop;
 633         unsigned int count = 0;
 634         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 635
 636         i = tx_ring->next_to_clean;
 637         eop = tx_ring->buffer_info[i].next_to_watch;
 638         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 639
 640         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
 641                (count < tx_ring->count)) {
 642                 bool cleaned = false;
 643                 for (; !cleaned; count++) {
 644                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 645                         buffer_info = &tx_ring->buffer_info[i];
 646                         cleaned = (i == eop);
 647
 648                         if (cleaned) {
 649                                 struct sk_buff *skb = buffer_info->skb;
 650                                 unsigned int segs, bytecount;
 651                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 652                                 /* multiply data chunks by size of headers */
 653                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 654                                             skb->len;
 655                                 total_tx_packets += segs;
 656                                 total_tx_bytes += bytecount;
 657                         }
 658
 659                         e1000_put_txbuf(adapter, buffer_info);
 660                         tx_desc->upper.data = 0;
 661
 662                         i++;
 663                         if (i == tx_ring->count)
 664                                 i = 0;
 665                 }
 666
 667                 eop = tx_ring->buffer_info[i].next_to_watch;
 668                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
 669         }
 670
 671         tx_ring->next_to_clean = i;
 672
 673 #define TX_WAKE_THRESHOLD 32
 674         if (count && netif_carrier_ok(netdev) &&
 675             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
 676                 /* Make sure that anybody stopping the queue after this
 677                  * sees the new next_to_clean.
 678                  */
 679                 smp_mb();
 680
 681                 if (netif_queue_stopped(netdev) &&
 682                     !(test_bit(__E1000_DOWN, &adapter->state))) {
 683                         netif_wake_queue(netdev);
 684                         ++adapter->restart_queue;
 685                 }
 686         }
 687
 688         if (adapter->detect_tx_hung) {
 689                 /*
 690                  * Detect a transmit hang in hardware, this serializes the
 691                  * check with the clearing of time_stamp and movement of i
 692                  */
 693                 adapter->detect_tx_hung = 0;
 694                 if (tx_ring->buffer_info[i].time_stamp &&
 695                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
 696                                + (adapter->tx_timeout_factor * HZ)) &&
 697                     !(er32(STATUS) & E1000_STATUS_TXOFF)) {
 698                         schedule_work(&adapter->print_hang_task);
 699                         netif_stop_queue(netdev);
 700                 }
 701         }
 702         adapter->total_tx_bytes += total_tx_bytes;
 703         adapter->total_tx_packets += total_tx_packets;
 704         netdev->stats.tx_bytes += total_tx_bytes;
 705         netdev->stats.tx_packets += total_tx_packets;
 706         return (count < tx_ring->count);
 707 }
 708
 709 /**
 710  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
 711  * @adapter: board private structure
 712  *
 713  * the return value indicates whether actual cleaning was done, there
 714  * is no guarantee that everything was cleaned
 715  **/
 716 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
 717                                   int *work_done, int work_to_do)
 718 {
 719         struct e1000_hw *hw = &adapter->hw;
 720         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
 721         struct net_device *netdev = adapter->netdev;
 722         struct pci_dev *pdev = adapter->pdev;
 723         struct e1000_ring *rx_ring = adapter->rx_ring;
 724         struct e1000_buffer *buffer_info, *next_buffer;
 725         struct e1000_ps_page *ps_page;
 726         struct sk_buff *skb;
 727         unsigned int i, j;
 728         u32 length, staterr;
 729         int cleaned_count = 0;
 730         bool cleaned = 0;
 731         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 732
 733         i = rx_ring->next_to_clean;
 734         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 735         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 736         buffer_info = &rx_ring->buffer_info[i];
 737
 738         while (staterr & E1000_RXD_STAT_DD) {
 739                 if (*work_done >= work_to_do)
 740                         break;
 741                 (*work_done)++;
 742                 skb = buffer_info->skb;
 743
 744                 /* in the packet split case this is header only */
 745                 prefetch(skb->data - NET_IP_ALIGN);
 746
 747                 i++;
 748                 if (i == rx_ring->count)
 749                         i = 0;
 750                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
 751                 prefetch(next_rxd);
 752
 753                 next_buffer = &rx_ring->buffer_info[i];
 754
 755                 cleaned = 1;
 756                 cleaned_count++;
 757                 pci_unmap_single(pdev, buffer_info->dma,
 758                                  adapter->rx_ps_bsize0,
 759                                  PCI_DMA_FROMDEVICE);
 760                 buffer_info->dma = 0;
 761
 762                 /* see !EOP comment in other rx routine */
 763                 if (!(staterr & E1000_RXD_STAT_EOP))
 764                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 765
 766                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 767                         e_dbg("Packet Split buffers didn't pick up the full "
 768                               "packet\n");
 769                         dev_kfree_skb_irq(skb);
 770                         if (staterr & E1000_RXD_STAT_EOP)
 771                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 772                         goto next_desc;
 773                 }
 774
 775                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 776                         dev_kfree_skb_irq(skb);
 777                         goto next_desc;
 778                 }
 779
 780                 length = le16_to_cpu(rx_desc->wb.middle.length0);
 781
 782                 if (!length) {
 783                         e_dbg("Last part of the packet spanning multiple "
 784                               "descriptors\n");
 785                         dev_kfree_skb_irq(skb);
 786                         goto next_desc;
 787                 }
 788
 789                 /* Good Receive */
 790                 skb_put(skb, length);
 791
 792                 {
 793                 /*
 794                  * this looks ugly, but it seems compiler issues make it
 795                  * more efficient than reusing j
 796                  */
 797                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
 798
 799                 /*
 800                  * page alloc/put takes too long and effects small packet
 801                  * throughput, so unsplit small packets and save the alloc/put
 802                  * only valid in softirq (napi) context to call kmap_*
 803                  */
 804                 if (l1 && (l1 <= copybreak) &&
 805                     ((length + l1) <= adapter->rx_ps_bsize0)) {
 806                         u8 *vaddr;
 807
 808                         ps_page = &buffer_info->ps_pages[0];
 809
 810                         /*
 811                          * there is no documentation about how to call
 812                          * kmap_atomic, so we can't hold the mapping
 813                          * very long
 814                          */
 815                         pci_dma_sync_single_for_cpu(pdev, ps_page->dma,
 816                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 817                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
 818                         memcpy(skb_tail_pointer(skb), vaddr, l1);
 819                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
 820                         pci_dma_sync_single_for_device(pdev, ps_page->dma,
 821                                 PAGE_SIZE, PCI_DMA_FROMDEVICE);
 822
 823                         /* remove the CRC */
 824                         if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 825                                 l1 -= 4;
 826
 827                         skb_put(skb, l1);
 828                         goto copydone;
 829                 } /* if */
 830                 }
 831
 832                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 833                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
 834                         if (!length)
 835                                 break;
 836
 837                         ps_page = &buffer_info->ps_pages[j];
 838                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
 839                                        PCI_DMA_FROMDEVICE);
 840                         ps_page->dma = 0;
 841                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
 842                         ps_page->page = NULL;
 843                         skb->len += length;
 844                         skb->data_len += length;
 845                         skb->truesize += length;
 846                 }
 847
 848                 /* strip the ethernet crc, problem is we're using pages now so
 849                  * this whole operation can get a little cpu intensive
 850                  */
 851                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 852                         pskb_trim(skb, skb->len - 4);
 853
 854 copydone:
 855                 total_rx_bytes += skb->len;
 856                 total_rx_packets++;
 857
 858                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
 859                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
 860
 861                 if (rx_desc->wb.upper.header_status &
 862                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
 863                         adapter->rx_hdr_split++;
 864
 865                 e1000_receive_skb(adapter, netdev, skb,
 866                                   staterr, rx_desc->wb.middle.vlan);
 867
 868 next_desc:
 869                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
 870                 buffer_info->skb = NULL;
 871
 872                 /* return some buffers to hardware, one at a time is too slow */
 873                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 874                         adapter->alloc_rx_buf(adapter, cleaned_count);
 875                         cleaned_count = 0;
 876                 }
 877
 878                 /* use prefetched values */
 879                 rx_desc = next_rxd;
 880                 buffer_info = next_buffer;
 881
 882                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
 883         }
 884         rx_ring->next_to_clean = i;
 885
 886         cleaned_count = e1000_desc_unused(rx_ring);
 887         if (cleaned_count)
 888                 adapter->alloc_rx_buf(adapter, cleaned_count);
 889
 890         adapter->total_rx_bytes += total_rx_bytes;
 891         adapter->total_rx_packets += total_rx_packets;
 892         netdev->stats.rx_bytes += total_rx_bytes;
 893         netdev->stats.rx_packets += total_rx_packets;
 894         return cleaned;
 895 }
 896
 897 /**
 898  * e1000_consume_page - helper function
 899  **/
 900 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
 901                                u16 length)
 902 {
 903         bi->page = NULL;
 904         skb->len += length;
 905         skb->data_len += length;
 906         skb->truesize += length;
 907 }
 908
 909 /**
 910  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
 911  * @adapter: board private structure
 912  *
 913  * the return value indicates whether actual cleaning was done, there
 914  * is no guarantee that everything was cleaned
 915  **/
 916
 917 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
 918                                      int *work_done, int work_to_do)
 919 {
 920         struct net_device *netdev = adapter->netdev;
 921         struct pci_dev *pdev = adapter->pdev;
 922         struct e1000_ring *rx_ring = adapter->rx_ring;
 923         struct e1000_rx_desc *rx_desc, *next_rxd;
 924         struct e1000_buffer *buffer_info, *next_buffer;
 925         u32 length;
 926         unsigned int i;
 927         int cleaned_count = 0;
 928         bool cleaned = false;
 929         unsigned int total_rx_bytes=0, total_rx_packets=0;
 930
 931         i = rx_ring->next_to_clean;
 932         rx_desc = E1000_RX_DESC(*rx_ring, i);
 933         buffer_info = &rx_ring->buffer_info[i];
 934
 935         while (rx_desc->status & E1000_RXD_STAT_DD) {
 936                 struct sk_buff *skb;
 937                 u8 status;
 938
 939                 if (*work_done >= work_to_do)
 940                         break;
 941                 (*work_done)++;
 942
 943                 status = rx_desc->status;
 944                 skb = buffer_info->skb;
 945                 buffer_info->skb = NULL;
 946
 947                 ++i;
 948                 if (i == rx_ring->count)
 949                         i = 0;
 950                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 951                 prefetch(next_rxd);
 952
 953                 next_buffer = &rx_ring->buffer_info[i];
 954
 955                 cleaned = true;
 956                 cleaned_count++;
 957                 pci_unmap_page(pdev, buffer_info->dma, PAGE_SIZE,
 958                                PCI_DMA_FROMDEVICE);
 959                 buffer_info->dma = 0;
 960
 961                 length = le16_to_cpu(rx_desc->length);
 962
 963                 /* errors is only valid for DD + EOP descriptors */
 964                 if (unlikely((status & E1000_RXD_STAT_EOP) &&
 965                     (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
 966                                 /* recycle both page and skb */
 967                                 buffer_info->skb = skb;
 968                                 /* an error means any chain goes out the window
 969                                  * too */
 970                                 if (rx_ring->rx_skb_top)
 971                                         dev_kfree_skb(rx_ring->rx_skb_top);
 972                                 rx_ring->rx_skb_top = NULL;
 973                                 goto next_desc;
 974                 }
 975
 976 #define rxtop rx_ring->rx_skb_top
 977                 if (!(status & E1000_RXD_STAT_EOP)) {
 978                         /* this descriptor is only the beginning (or middle) */
 979                         if (!rxtop) {
 980                                 /* this is the beginning of a chain */
 981                                 rxtop = skb;
 982                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
 983                                                    0, length);
 984                         } else {
 985                                 /* this is the middle of a chain */
 986                                 skb_fill_page_desc(rxtop,
 987                                     skb_shinfo(rxtop)->nr_frags,
 988                                     buffer_info->page, 0, length);
 989                                 /* re-use the skb, only consumed the page */
 990                                 buffer_info->skb = skb;
 991                         }
 992                         e1000_consume_page(buffer_info, rxtop, length);
 993                         goto next_desc;
 994                 } else {
 995                         if (rxtop) {
 996                                 /* end of the chain */
 997                                 skb_fill_page_desc(rxtop,
 998                                     skb_shinfo(rxtop)->nr_frags,
 999                                     buffer_info->page, 0, length);
1000                                 /* re-use the current skb, we only consumed the
1001                                  * page */
1002                                 buffer_info->skb = skb;
1003                                 skb = rxtop;
1004                                 rxtop = NULL;
1005                                 e1000_consume_page(buffer_info, skb, length);
1006                         } else {
1007                                 /* no chain, got EOP, this buf is the packet
1008                                  * copybreak to save the put_page/alloc_page */
1009                                 if (length <= copybreak &&
1010                                     skb_tailroom(skb) >= length) {
1011                                         u8 *vaddr;
1012                                         vaddr = kmap_atomic(buffer_info->page,
1013                                                            KM_SKB_DATA_SOFTIRQ);
1014                                         memcpy(skb_tail_pointer(skb), vaddr,
1015                                                length);
1016                                         kunmap_atomic(vaddr,
1017                                                       KM_SKB_DATA_SOFTIRQ);
1018                                         /* re-use the page, so don't erase
1019                                          * buffer_info->page */
1020                                         skb_put(skb, length);
1021                                 } else {
1022                                         skb_fill_page_desc(skb, 0,
1023                                                            buffer_info->page, 0,
1024                                                            length);
1025                                         e1000_consume_page(buffer_info, skb,
1026                                                            length);
1027                                 }
1028                         }
1029                 }
1030
1031                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1032                 e1000_rx_checksum(adapter,
1033                                   (u32)(status) |
1034                                   ((u32)(rx_desc->errors) << 24),
1035                                   le16_to_cpu(rx_desc->csum), skb);
1036
1037                 /* probably a little skewed due to removing CRC */
1038                 total_rx_bytes += skb->len;
1039                 total_rx_packets++;
1040
1041                 /* eth type trans needs skb->data to point to something */
1042                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1043                         e_err("pskb_may_pull failed.\n");
1044                         dev_kfree_skb(skb);
1045                         goto next_desc;
1046                 }
1047
1048                 e1000_receive_skb(adapter, netdev, skb, status,
1049                                   rx_desc->special);
1050
1051 next_desc:
1052                 rx_desc->status = 0;
1053
1054                 /* return some buffers to hardware, one at a time is too slow */
1055                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1056                         adapter->alloc_rx_buf(adapter, cleaned_count);
1057                         cleaned_count = 0;
1058                 }
1059
1060                 /* use prefetched values */
1061                 rx_desc = next_rxd;
1062                 buffer_info = next_buffer;
1063         }
1064         rx_ring->next_to_clean = i;
1065
1066         cleaned_count = e1000_desc_unused(rx_ring);
1067         if (cleaned_count)
1068                 adapter->alloc_rx_buf(adapter, cleaned_count);
1069
1070         adapter->total_rx_bytes += total_rx_bytes;
1071         adapter->total_rx_packets += total_rx_packets;
1072         netdev->stats.rx_bytes += total_rx_bytes;
1073         netdev->stats.rx_packets += total_rx_packets;
1074         return cleaned;
1075 }
1076
1077 /**
1078  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1079  * @adapter: board private structure
1080  **/
1081 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1082 {
1083         struct e1000_ring *rx_ring = adapter->rx_ring;
1084         struct e1000_buffer *buffer_info;
1085         struct e1000_ps_page *ps_page;
1086         struct pci_dev *pdev = adapter->pdev;
1087         unsigned int i, j;
1088
1089         /* Free all the Rx ring sk_buffs */
1090         for (i = 0; i < rx_ring->count; i++) {
1091                 buffer_info = &rx_ring->buffer_info[i];
1092                 if (buffer_info->dma) {
1093                         if (adapter->clean_rx == e1000_clean_rx_irq)
1094                                 pci_unmap_single(pdev, buffer_info->dma,
1095                                                  adapter->rx_buffer_len,
1096                                                  PCI_DMA_FROMDEVICE);
1097                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1098                                 pci_unmap_page(pdev, buffer_info->dma,
1099                                                PAGE_SIZE,
1100                                                PCI_DMA_FROMDEVICE);
1101                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1102                                 pci_unmap_single(pdev, buffer_info->dma,
1103                                                  adapter->rx_ps_bsize0,
1104                                                  PCI_DMA_FROMDEVICE);
1105                         buffer_info->dma = 0;
1106                 }
1107
1108                 if (buffer_info->page) {
1109                         put_page(buffer_info->page);
1110                         buffer_info->page = NULL;
1111                 }
1112
1113                 if (buffer_info->skb) {
1114                         dev_kfree_skb(buffer_info->skb);
1115                         buffer_info->skb = NULL;
1116                 }
1117
1118                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1119                         ps_page = &buffer_info->ps_pages[j];
1120                         if (!ps_page->page)
1121                                 break;
1122                         pci_unmap_page(pdev, ps_page->dma, PAGE_SIZE,
1123                                        PCI_DMA_FROMDEVICE);
1124                         ps_page->dma = 0;
1125                         put_page(ps_page->page);
1126                         ps_page->page = NULL;
1127                 }
1128         }
1129
1130         /* there also may be some cached data from a chained receive */
1131         if (rx_ring->rx_skb_top) {
1132                 dev_kfree_skb(rx_ring->rx_skb_top);
1133                 rx_ring->rx_skb_top = NULL;
1134         }
1135
1136         /* Zero out the descriptor ring */
1137         memset(rx_ring->desc, 0, rx_ring->size);
1138
1139         rx_ring->next_to_clean = 0;
1140         rx_ring->next_to_use = 0;
1141         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1142
1143         writel(0, adapter->hw.hw_addr + rx_ring->head);
1144         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1145 }
1146
1147 static void e1000e_downshift_workaround(struct work_struct *work)
1148 {
1149         struct e1000_adapter *adapter = container_of(work,
1150                                         struct e1000_adapter, downshift_task);
1151
1152         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1153 }
1154
1155 /**
1156  * e1000_intr_msi - Interrupt Handler
1157  * @irq: interrupt number
1158  * @data: pointer to a network interface device structure
1159  **/
1160 static irqreturn_t e1000_intr_msi(int irq, void *data)
1161 {
1162         struct net_device *netdev = data;
1163         struct e1000_adapter *adapter = netdev_priv(netdev);
1164         struct e1000_hw *hw = &adapter->hw;
1165         u32 icr = er32(ICR);
1166
1167         /*
1168          * read ICR disables interrupts using IAM
1169          */
1170
1171         if (icr & E1000_ICR_LSC) {
1172                 hw->mac.get_link_status = 1;
1173                 /*
1174                  * ICH8 workaround-- Call gig speed drop workaround on cable
1175                  * disconnect (LSC) before accessing any PHY registers
1176                  */
1177                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1178                     (!(er32(STATUS) & E1000_STATUS_LU)))
1179                         schedule_work(&adapter->downshift_task);
1180
1181                 /*
1182                  * 80003ES2LAN workaround-- For packet buffer work-around on
1183                  * link down event; disable receives here in the ISR and reset
1184                  * adapter in watchdog
1185                  */
1186                 if (netif_carrier_ok(netdev) &&
1187                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1188                         /* disable receives */
1189                         u32 rctl = er32(RCTL);
1190                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1191                         adapter->flags |= FLAG_RX_RESTART_NOW;
1192                 }
1193                 /* guard against interrupt when we're going down */
1194                 if (!test_bit(__E1000_DOWN, &adapter->state))
1195                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1196         }
1197
1198         if (napi_schedule_prep(&adapter->napi)) {
1199                 adapter->total_tx_bytes = 0;
1200                 adapter->total_tx_packets = 0;
1201                 adapter->total_rx_bytes = 0;
1202                 adapter->total_rx_packets = 0;
1203                 __napi_schedule(&adapter->napi);
1204         }
1205
1206         return IRQ_HANDLED;
1207 }
1208
1209 /**
1210  * e1000_intr - Interrupt Handler
1211  * @irq: interrupt number
1212  * @data: pointer to a network interface device structure
1213  **/
1214 static irqreturn_t e1000_intr(int irq, void *data)
1215 {
1216         struct net_device *netdev = data;
1217         struct e1000_adapter *adapter = netdev_priv(netdev);
1218         struct e1000_hw *hw = &adapter->hw;
1219         u32 rctl, icr = er32(ICR);
1220
1221         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1222                 return IRQ_NONE;  /* Not our interrupt */
1223
1224         /*
1225          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1226          * not set, then the adapter didn't send an interrupt
1227          */
1228         if (!(icr & E1000_ICR_INT_ASSERTED))
1229                 return IRQ_NONE;
1230
1231         /*
1232          * Interrupt Auto-Mask...upon reading ICR,
1233          * interrupts are masked.  No need for the
1234          * IMC write
1235          */
1236
1237         if (icr & E1000_ICR_LSC) {
1238                 hw->mac.get_link_status = 1;
1239                 /*
1240                  * ICH8 workaround-- Call gig speed drop workaround on cable
1241                  * disconnect (LSC) before accessing any PHY registers
1242                  */
1243                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1244                     (!(er32(STATUS) & E1000_STATUS_LU)))
1245                         schedule_work(&adapter->downshift_task);
1246
1247                 /*
1248                  * 80003ES2LAN workaround--
1249                  * For packet buffer work-around on link down event;
1250                  * disable receives here in the ISR and
1251                  * reset adapter in watchdog
1252                  */
1253                 if (netif_carrier_ok(netdev) &&
1254                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1255                         /* disable receives */
1256                         rctl = er32(RCTL);
1257                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1258                         adapter->flags |= FLAG_RX_RESTART_NOW;
1259                 }
1260                 /* guard against interrupt when we're going down */
1261                 if (!test_bit(__E1000_DOWN, &adapter->state))
1262                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1263         }
1264
1265         if (napi_schedule_prep(&adapter->napi)) {
1266                 adapter->total_tx_bytes = 0;
1267                 adapter->total_tx_packets = 0;
1268                 adapter->total_rx_bytes = 0;
1269                 adapter->total_rx_packets = 0;
1270                 __napi_schedule(&adapter->napi);
1271         }
1272
1273         return IRQ_HANDLED;
1274 }
1275
1276 static irqreturn_t e1000_msix_other(int irq, void *data)
1277 {
1278         struct net_device *netdev = data;
1279         struct e1000_adapter *adapter = netdev_priv(netdev);
1280         struct e1000_hw *hw = &adapter->hw;
1281         u32 icr = er32(ICR);
1282
1283         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1284                 if (!test_bit(__E1000_DOWN, &adapter->state))
1285                         ew32(IMS, E1000_IMS_OTHER);
1286                 return IRQ_NONE;
1287         }
1288
1289         if (icr & adapter->eiac_mask)
1290                 ew32(ICS, (icr & adapter->eiac_mask));
1291
1292         if (icr & E1000_ICR_OTHER) {
1293                 if (!(icr & E1000_ICR_LSC))
1294                         goto no_link_interrupt;
1295                 hw->mac.get_link_status = 1;
1296                 /* guard against interrupt when we're going down */
1297                 if (!test_bit(__E1000_DOWN, &adapter->state))
1298                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1299         }
1300
1301 no_link_interrupt:
1302         if (!test_bit(__E1000_DOWN, &adapter->state))
1303                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1304
1305         return IRQ_HANDLED;
1306 }
1307
1308
1309 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1310 {
1311         struct net_device *netdev = data;
1312         struct e1000_adapter *adapter = netdev_priv(netdev);
1313         struct e1000_hw *hw = &adapter->hw;
1314         struct e1000_ring *tx_ring = adapter->tx_ring;
1315
1316
1317         adapter->total_tx_bytes = 0;
1318         adapter->total_tx_packets = 0;
1319
1320         if (!e1000_clean_tx_irq(adapter))
1321                 /* Ring was not completely cleaned, so fire another interrupt */
1322                 ew32(ICS, tx_ring->ims_val);
1323
1324         return IRQ_HANDLED;
1325 }
1326
1327 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1328 {
1329         struct net_device *netdev = data;
1330         struct e1000_adapter *adapter = netdev_priv(netdev);
1331
1332         /* Write the ITR value calculated at the end of the
1333          * previous interrupt.
1334          */
1335         if (adapter->rx_ring->set_itr) {
1336                 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1337                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1338                 adapter->rx_ring->set_itr = 0;
1339         }
1340
1341         if (napi_schedule_prep(&adapter->napi)) {
1342                 adapter->total_rx_bytes = 0;
1343                 adapter->total_rx_packets = 0;
1344                 __napi_schedule(&adapter->napi);
1345         }
1346         return IRQ_HANDLED;
1347 }
1348
1349 /**
1350  * e1000_configure_msix - Configure MSI-X hardware
1351  *
1352  * e1000_configure_msix sets up the hardware to properly
1353  * generate MSI-X interrupts.
1354  **/
1355 static void e1000_configure_msix(struct e1000_adapter *adapter)
1356 {
1357         struct e1000_hw *hw = &adapter->hw;
1358         struct e1000_ring *rx_ring = adapter->rx_ring;
1359         struct e1000_ring *tx_ring = adapter->tx_ring;
1360         int vector = 0;
1361         u32 ctrl_ext, ivar = 0;
1362
1363         adapter->eiac_mask = 0;
1364
1365         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1366         if (hw->mac.type == e1000_82574) {
1367                 u32 rfctl = er32(RFCTL);
1368                 rfctl |= E1000_RFCTL_ACK_DIS;
1369                 ew32(RFCTL, rfctl);
1370         }
1371
1372 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1373         /* Configure Rx vector */
1374         rx_ring->ims_val = E1000_IMS_RXQ0;
1375         adapter->eiac_mask |= rx_ring->ims_val;
1376         if (rx_ring->itr_val)
1377                 writel(1000000000 / (rx_ring->itr_val * 256),
1378                        hw->hw_addr + rx_ring->itr_register);
1379         else
1380                 writel(1, hw->hw_addr + rx_ring->itr_register);
1381         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1382
1383         /* Configure Tx vector */
1384         tx_ring->ims_val = E1000_IMS_TXQ0;
1385         vector++;
1386         if (tx_ring->itr_val)
1387                 writel(1000000000 / (tx_ring->itr_val * 256),
1388                        hw->hw_addr + tx_ring->itr_register);
1389         else
1390                 writel(1, hw->hw_addr + tx_ring->itr_register);
1391         adapter->eiac_mask |= tx_ring->ims_val;
1392         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1393
1394         /* set vector for Other Causes, e.g. link changes */
1395         vector++;
1396         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1397         if (rx_ring->itr_val)
1398                 writel(1000000000 / (rx_ring->itr_val * 256),
1399                        hw->hw_addr + E1000_EITR_82574(vector));
1400         else
1401                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1402
1403         /* Cause Tx interrupts on every write back */
1404         ivar |= (1 << 31);
1405
1406         ew32(IVAR, ivar);
1407
1408         /* enable MSI-X PBA support */
1409         ctrl_ext = er32(CTRL_EXT);
1410         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1411
1412         /* Auto-Mask Other interrupts upon ICR read */
1413 #define E1000_EIAC_MASK_82574   0x01F00000
1414         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1415         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1416         ew32(CTRL_EXT, ctrl_ext);
1417         e1e_flush();
1418 }
1419
1420 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1421 {
1422         if (adapter->msix_entries) {
1423                 pci_disable_msix(adapter->pdev);
1424                 kfree(adapter->msix_entries);
1425                 adapter->msix_entries = NULL;
1426         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1427                 pci_disable_msi(adapter->pdev);
1428                 adapter->flags &= ~FLAG_MSI_ENABLED;
1429         }
1430
1431         return;
1432 }
1433
1434 /**
1435  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1436  *
1437  * Attempt to configure interrupts using the best available
1438  * capabilities of the hardware and kernel.
1439  **/
1440 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1441 {
1442         int err;
1443         int numvecs, i;
1444
1445
1446         switch (adapter->int_mode) {
1447         case E1000E_INT_MODE_MSIX:
1448                 if (adapter->flags & FLAG_HAS_MSIX) {
1449                         numvecs = 3; /* RxQ0, TxQ0 and other */
1450                         adapter->msix_entries = kcalloc(numvecs,
1451                                                       sizeof(struct msix_entry),
1452                                                       GFP_KERNEL);
1453                         if (adapter->msix_entries) {
1454                                 for (i = 0; i < numvecs; i++)
1455                                         adapter->msix_entries[i].entry = i;
1456
1457                                 err = pci_enable_msix(adapter->pdev,
1458                                                       adapter->msix_entries,
1459                                                       numvecs);
1460                                 if (err == 0)
1461                                         return;
1462                         }
1463                         /* MSI-X failed, so fall through and try MSI */
1464                         e_err("Failed to initialize MSI-X interrupts.  "
1465                               "Falling back to MSI interrupts.\n");
1466                         e1000e_reset_interrupt_capability(adapter);
1467                 }
1468                 adapter->int_mode = E1000E_INT_MODE_MSI;
1469                 /* Fall through */
1470         case E1000E_INT_MODE_MSI:
1471                 if (!pci_enable_msi(adapter->pdev)) {
1472                         adapter->flags |= FLAG_MSI_ENABLED;
1473                 } else {
1474                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1475                         e_err("Failed to initialize MSI interrupts.  Falling "
1476                               "back to legacy interrupts.\n");
1477                 }
1478                 /* Fall through */
1479         case E1000E_INT_MODE_LEGACY:
1480                 /* Don't do anything; this is the system default */
1481                 break;
1482         }
1483
1484         return;
1485 }
1486
1487 /**
1488  * e1000_request_msix - Initialize MSI-X interrupts
1489  *
1490  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1491  * kernel.
1492  **/
1493 static int e1000_request_msix(struct e1000_adapter *adapter)
1494 {
1495         struct net_device *netdev = adapter->netdev;
1496         int err = 0, vector = 0;
1497
1498         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1499                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1500         else
1501                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1502         err = request_irq(adapter->msix_entries[vector].vector,
1503                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1504                           netdev);
1505         if (err)
1506                 goto out;
1507         adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1508         adapter->rx_ring->itr_val = adapter->itr;
1509         vector++;
1510
1511         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1512                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1513         else
1514                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1515         err = request_irq(adapter->msix_entries[vector].vector,
1516                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1517                           netdev);
1518         if (err)
1519                 goto out;
1520         adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1521         adapter->tx_ring->itr_val = adapter->itr;
1522         vector++;
1523
1524         err = request_irq(adapter->msix_entries[vector].vector,
1525                           e1000_msix_other, 0, netdev->name, netdev);
1526         if (err)
1527                 goto out;
1528
1529         e1000_configure_msix(adapter);
1530         return 0;
1531 out:
1532         return err;
1533 }
1534
1535 /**
1536  * e1000_request_irq - initialize interrupts
1537  *
1538  * Attempts to configure interrupts using the best available
1539  * capabilities of the hardware and kernel.
1540  **/
1541 static int e1000_request_irq(struct e1000_adapter *adapter)
1542 {
1543         struct net_device *netdev = adapter->netdev;
1544         int err;
1545
1546         if (adapter->msix_entries) {
1547                 err = e1000_request_msix(adapter);
1548                 if (!err)
1549                         return err;
1550                 /* fall back to MSI */
1551                 e1000e_reset_interrupt_capability(adapter);
1552                 adapter->int_mode = E1000E_INT_MODE_MSI;
1553                 e1000e_set_interrupt_capability(adapter);
1554         }
1555         if (adapter->flags & FLAG_MSI_ENABLED) {
1556                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
1557                                   netdev->name, netdev);
1558                 if (!err)
1559                         return err;
1560
1561                 /* fall back to legacy interrupt */
1562                 e1000e_reset_interrupt_capability(adapter);
1563                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1564         }
1565
1566         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
1567                           netdev->name, netdev);
1568         if (err)
1569                 e_err("Unable to allocate interrupt, Error: %d\n", err);
1570
1571         return err;
1572 }
1573
1574 static void e1000_free_irq(struct e1000_adapter *adapter)
1575 {
1576         struct net_device *netdev = adapter->netdev;
1577
1578         if (adapter->msix_entries) {
1579                 int vector = 0;
1580
1581                 free_irq(adapter->msix_entries[vector].vector, netdev);
1582                 vector++;
1583
1584                 free_irq(adapter->msix_entries[vector].vector, netdev);
1585                 vector++;
1586
1587                 /* Other Causes interrupt vector */
1588                 free_irq(adapter->msix_entries[vector].vector, netdev);
1589                 return;
1590         }
1591
1592         free_irq(adapter->pdev->irq, netdev);
1593 }
1594
1595 /**
1596  * e1000_irq_disable - Mask off interrupt generation on the NIC
1597  **/
1598 static void e1000_irq_disable(struct e1000_adapter *adapter)
1599 {
1600         struct e1000_hw *hw = &adapter->hw;
1601
1602         ew32(IMC, ~0);
1603         if (adapter->msix_entries)
1604                 ew32(EIAC_82574, 0);
1605         e1e_flush();
1606         synchronize_irq(adapter->pdev->irq);
1607 }
1608
1609 /**
1610  * e1000_irq_enable - Enable default interrupt generation settings
1611  **/
1612 static void e1000_irq_enable(struct e1000_adapter *adapter)
1613 {
1614         struct e1000_hw *hw = &adapter->hw;
1615
1616         if (adapter->msix_entries) {
1617                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1618                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1619         } else {
1620                 ew32(IMS, IMS_ENABLE_MASK);
1621         }
1622         e1e_flush();
1623 }
1624
1625 /**
1626  * e1000_get_hw_control - get control of the h/w from f/w
1627  * @adapter: address of board private structure
1628  *
1629  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1630  * For ASF and Pass Through versions of f/w this means that
1631  * the driver is loaded. For AMT version (only with 82573)
1632  * of the f/w this means that the network i/f is open.
1633  **/
1634 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1635 {
1636         struct e1000_hw *hw = &adapter->hw;
1637         u32 ctrl_ext;
1638         u32 swsm;
1639
1640         /* Let firmware know the driver has taken over */
1641         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1642                 swsm = er32(SWSM);
1643                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1644         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1645                 ctrl_ext = er32(CTRL_EXT);
1646                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1647         }
1648 }
1649
1650 /**
1651  * e1000_release_hw_control - release control of the h/w to f/w
1652  * @adapter: address of board private structure
1653  *
1654  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1655  * For ASF and Pass Through versions of f/w this means that the
1656  * driver is no longer loaded. For AMT version (only with 82573) i
1657  * of the f/w this means that the network i/f is closed.
1658  *
1659  **/
1660 static void e1000_release_hw_control(struct e1000_adapter *adapter)
1661 {
1662         struct e1000_hw *hw = &adapter->hw;
1663         u32 ctrl_ext;
1664         u32 swsm;
1665
1666         /* Let firmware taken over control of h/w */
1667         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1668                 swsm = er32(SWSM);
1669                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
1670         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1671                 ctrl_ext = er32(CTRL_EXT);
1672                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
1673         }
1674 }
1675
1676 /**
1677  * @e1000_alloc_ring - allocate memory for a ring structure
1678  **/
1679 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
1680                                 struct e1000_ring *ring)
1681 {
1682         struct pci_dev *pdev = adapter->pdev;
1683
1684         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
1685                                         GFP_KERNEL);
1686         if (!ring->desc)
1687                 return -ENOMEM;
1688
1689         return 0;
1690 }
1691
1692 /**
1693  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
1694  * @adapter: board private structure
1695  *
1696  * Return 0 on success, negative on failure
1697  **/
1698 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
1699 {
1700         struct e1000_ring *tx_ring = adapter->tx_ring;
1701         int err = -ENOMEM, size;
1702
1703         size = sizeof(struct e1000_buffer) * tx_ring->count;
1704         tx_ring->buffer_info = vmalloc(size);
1705         if (!tx_ring->buffer_info)
1706                 goto err;
1707         memset(tx_ring->buffer_info, 0, size);
1708
1709         /* round up to nearest 4K */
1710         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
1711         tx_ring->size = ALIGN(tx_ring->size, 4096);
1712
1713         err = e1000_alloc_ring_dma(adapter, tx_ring);
1714         if (err)
1715                 goto err;
1716
1717         tx_ring->next_to_use = 0;
1718         tx_ring->next_to_clean = 0;
1719
1720         return 0;
1721 err:
1722         vfree(tx_ring->buffer_info);
1723         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1724         return err;
1725 }
1726
1727 /**
1728  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
1729  * @adapter: board private structure
1730  *
1731  * Returns 0 on success, negative on failure
1732  **/
1733 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
1734 {
1735         struct e1000_ring *rx_ring = adapter->rx_ring;
1736         struct e1000_buffer *buffer_info;
1737         int i, size, desc_len, err = -ENOMEM;
1738
1739         size = sizeof(struct e1000_buffer) * rx_ring->count;
1740         rx_ring->buffer_info = vmalloc(size);
1741         if (!rx_ring->buffer_info)
1742                 goto err;
1743         memset(rx_ring->buffer_info, 0, size);
1744
1745         for (i = 0; i < rx_ring->count; i++) {
1746                 buffer_info = &rx_ring->buffer_info[i];
1747                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
1748                                                 sizeof(struct e1000_ps_page),
1749                                                 GFP_KERNEL);
1750                 if (!buffer_info->ps_pages)
1751                         goto err_pages;
1752         }
1753
1754         desc_len = sizeof(union e1000_rx_desc_packet_split);
1755
1756         /* Round up to nearest 4K */
1757         rx_ring->size = rx_ring->count * desc_len;
1758         rx_ring->size = ALIGN(rx_ring->size, 4096);
1759
1760         err = e1000_alloc_ring_dma(adapter, rx_ring);
1761         if (err)
1762                 goto err_pages;
1763
1764         rx_ring->next_to_clean = 0;
1765         rx_ring->next_to_use = 0;
1766         rx_ring->rx_skb_top = NULL;
1767
1768         return 0;
1769
1770 err_pages:
1771         for (i = 0; i < rx_ring->count; i++) {
1772                 buffer_info = &rx_ring->buffer_info[i];
1773                 kfree(buffer_info->ps_pages);
1774         }
1775 err:
1776         vfree(rx_ring->buffer_info);
1777         e_err("Unable to allocate memory for the transmit descriptor ring\n");
1778         return err;
1779 }
1780
1781 /**
1782  * e1000_clean_tx_ring - Free Tx Buffers
1783  * @adapter: board private structure
1784  **/
1785 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
1786 {
1787         struct e1000_ring *tx_ring = adapter->tx_ring;
1788         struct e1000_buffer *buffer_info;
1789         unsigned long size;
1790         unsigned int i;
1791
1792         for (i = 0; i < tx_ring->count; i++) {
1793                 buffer_info = &tx_ring->buffer_info[i];
1794                 e1000_put_txbuf(adapter, buffer_info);
1795         }
1796
1797         size = sizeof(struct e1000_buffer) * tx_ring->count;
1798         memset(tx_ring->buffer_info, 0, size);
1799
1800         memset(tx_ring->desc, 0, tx_ring->size);
1801
1802         tx_ring->next_to_use = 0;
1803         tx_ring->next_to_clean = 0;
1804
1805         writel(0, adapter->hw.hw_addr + tx_ring->head);
1806         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1807 }
1808
1809 /**
1810  * e1000e_free_tx_resources - Free Tx Resources per Queue
1811  * @adapter: board private structure
1812  *
1813  * Free all transmit software resources
1814  **/
1815 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
1816 {
1817         struct pci_dev *pdev = adapter->pdev;
1818         struct e1000_ring *tx_ring = adapter->tx_ring;
1819
1820         e1000_clean_tx_ring(adapter);
1821
1822         vfree(tx_ring->buffer_info);
1823         tx_ring->buffer_info = NULL;
1824
1825         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
1826                           tx_ring->dma);
1827         tx_ring->desc = NULL;
1828 }
1829
1830 /**
1831  * e1000e_free_rx_resources - Free Rx Resources
1832  * @adapter: board private structure
1833  *
1834  * Free all receive software resources
1835  **/
1836
1837 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
1838 {
1839         struct pci_dev *pdev = adapter->pdev;
1840         struct e1000_ring *rx_ring = adapter->rx_ring;
1841         int i;
1842
1843         e1000_clean_rx_ring(adapter);
1844
1845         for (i = 0; i < rx_ring->count; i++) {
1846                 kfree(rx_ring->buffer_info[i].ps_pages);
1847         }
1848
1849         vfree(rx_ring->buffer_info);
1850         rx_ring->buffer_info = NULL;
1851
1852         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
1853                           rx_ring->dma);
1854         rx_ring->desc = NULL;
1855 }
1856
1857 /**
1858  * e1000_update_itr - update the dynamic ITR value based on statistics
1859  * @adapter: pointer to adapter
1860  * @itr_setting: current adapter->itr
1861  * @packets: the number of packets during this measurement interval
1862  * @bytes: the number of bytes during this measurement interval
1863  *
1864  *      Stores a new ITR value based on packets and byte
1865  *      counts during the last interrupt.  The advantage of per interrupt
1866  *      computation is faster updates and more accurate ITR for the current
1867  *      traffic pattern.  Constants in this function were computed
1868  *      based on theoretical maximum wire speed and thresholds were set based
1869  *      on testing data as well as attempting to minimize response time
1870  *      while increasing bulk throughput.  This functionality is controlled
1871  *      by the InterruptThrottleRate module parameter.
1872  **/
1873 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
1874                                      u16 itr_setting, int packets,
1875                                      int bytes)
1876 {
1877         unsigned int retval = itr_setting;
1878
1879         if (packets == 0)
1880                 goto update_itr_done;
1881
1882         switch (itr_setting) {
1883         case lowest_latency:
1884                 /* handle TSO and jumbo frames */
1885                 if (bytes/packets > 8000)
1886                         retval = bulk_latency;
1887                 else if ((packets < 5) && (bytes > 512)) {
1888                         retval = low_latency;
1889                 }
1890                 break;
1891         case low_latency:  /* 50 usec aka 20000 ints/s */
1892                 if (bytes > 10000) {
1893                         /* this if handles the TSO accounting */
1894                         if (bytes/packets > 8000) {
1895                                 retval = bulk_latency;
1896                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
1897                                 retval = bulk_latency;
1898                         } else if ((packets > 35)) {
1899                                 retval = lowest_latency;
1900                         }
1901                 } else if (bytes/packets > 2000) {
1902                         retval = bulk_latency;
1903                 } else if (packets <= 2 && bytes < 512) {
1904                         retval = lowest_latency;
1905                 }
1906                 break;
1907         case bulk_latency: /* 250 usec aka 4000 ints/s */
1908                 if (bytes > 25000) {
1909                         if (packets > 35) {
1910                                 retval = low_latency;
1911                         }
1912                 } else if (bytes < 6000) {
1913                         retval = low_latency;
1914                 }
1915                 break;
1916         }
1917
1918 update_itr_done:
1919         return retval;
1920 }
1921
1922 static void e1000_set_itr(struct e1000_adapter *adapter)
1923 {
1924         struct e1000_hw *hw = &adapter->hw;
1925         u16 current_itr;
1926         u32 new_itr = adapter->itr;
1927
1928         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
1929         if (adapter->link_speed != SPEED_1000) {
1930                 current_itr = 0;
1931                 new_itr = 4000;
1932                 goto set_itr_now;
1933         }
1934
1935         adapter->tx_itr = e1000_update_itr(adapter,
1936                                     adapter->tx_itr,
1937                                     adapter->total_tx_packets,
1938                                     adapter->total_tx_bytes);
1939         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1940         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
1941                 adapter->tx_itr = low_latency;
1942
1943         adapter->rx_itr = e1000_update_itr(adapter,
1944                                     adapter->rx_itr,
1945                                     adapter->total_rx_packets,
1946                                     adapter->total_rx_bytes);
1947         /* conservative mode (itr 3) eliminates the lowest_latency setting */
1948         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
1949                 adapter->rx_itr = low_latency;
1950
1951         current_itr = max(adapter->rx_itr, adapter->tx_itr);
1952
1953         switch (current_itr) {
1954         /* counts and packets in update_itr are dependent on these numbers */
1955         case lowest_latency:
1956                 new_itr = 70000;
1957                 break;
1958         case low_latency:
1959                 new_itr = 20000; /* aka hwitr = ~200 */
1960                 break;
1961         case bulk_latency:
1962                 new_itr = 4000;
1963                 break;
1964         default:
1965                 break;
1966         }
1967
1968 set_itr_now:
1969         if (new_itr != adapter->itr) {
1970                 /*
1971                  * this attempts to bias the interrupt rate towards Bulk
1972                  * by adding intermediate steps when interrupt rate is
1973                  * increasing
1974                  */
1975                 new_itr = new_itr > adapter->itr ?
1976                              min(adapter->itr + (new_itr >> 2), new_itr) :
1977                              new_itr;
1978                 adapter->itr = new_itr;
1979                 adapter->rx_ring->itr_val = new_itr;
1980                 if (adapter->msix_entries)
1981                         adapter->rx_ring->set_itr = 1;
1982                 else
1983                         ew32(ITR, 1000000000 / (new_itr * 256));
1984         }
1985 }
1986
1987 /**
1988  * e1000_alloc_queues - Allocate memory for all rings
1989  * @adapter: board private structure to initialize
1990  **/
1991 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
1992 {
1993         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1994         if (!adapter->tx_ring)
1995                 goto err;
1996
1997         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
1998         if (!adapter->rx_ring)
1999                 goto err;
2000
2001         return 0;
2002 err:
2003         e_err("Unable to allocate memory for queues\n");
2004         kfree(adapter->rx_ring);
2005         kfree(adapter->tx_ring);
2006         return -ENOMEM;
2007 }
2008
2009 /**
2010  * e1000_clean - NAPI Rx polling callback
2011  * @napi: struct associated with this polling callback
2012  * @budget: amount of packets driver is allowed to process this poll
2013  **/
2014 static int e1000_clean(struct napi_struct *napi, int budget)
2015 {
2016         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
2017         struct e1000_hw *hw = &adapter->hw;
2018         struct net_device *poll_dev = adapter->netdev;
2019         int tx_cleaned = 1, work_done = 0;
2020
2021         adapter = netdev_priv(poll_dev);
2022
2023         if (adapter->msix_entries &&
2024             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2025                 goto clean_rx;
2026
2027         tx_cleaned = e1000_clean_tx_irq(adapter);
2028
2029 clean_rx:
2030         adapter->clean_rx(adapter, &work_done, budget);
2031
2032         if (!tx_cleaned)
2033                 work_done = budget;
2034
2035         /* If budget not fully consumed, exit the polling mode */
2036         if (work_done < budget) {
2037                 if (adapter->itr_setting & 3)
2038                         e1000_set_itr(adapter);
2039                 napi_complete(napi);
2040                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2041                         if (adapter->msix_entries)
2042                                 ew32(IMS, adapter->rx_ring->ims_val);
2043                         else
2044                                 e1000_irq_enable(adapter);
2045                 }
2046         }
2047
2048         return work_done;
2049 }
2050
2051 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2052 {
2053         struct e1000_adapter *adapter = netdev_priv(netdev);
2054         struct e1000_hw *hw = &adapter->hw;
2055         u32 vfta, index;
2056
2057         /* don't update vlan cookie if already programmed */
2058         if ((adapter->hw.mng_cookie.status &
2059              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2060             (vid == adapter->mng_vlan_id))
2061                 return;
2062
2063         /* add VID to filter table */
2064         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2065                 index = (vid >> 5) & 0x7F;
2066                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2067                 vfta |= (1 << (vid & 0x1F));
2068                 hw->mac.ops.write_vfta(hw, index, vfta);
2069         }
2070 }
2071
2072 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2073 {
2074         struct e1000_adapter *adapter = netdev_priv(netdev);
2075         struct e1000_hw *hw = &adapter->hw;
2076         u32 vfta, index;
2077
2078         if (!test_bit(__E1000_DOWN, &adapter->state))
2079                 e1000_irq_disable(adapter);
2080         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2081
2082         if (!test_bit(__E1000_DOWN, &adapter->state))
2083                 e1000_irq_enable(adapter);
2084
2085         if ((adapter->hw.mng_cookie.status &
2086              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2087             (vid == adapter->mng_vlan_id)) {
2088                 /* release control to f/w */
2089                 e1000_release_hw_control(adapter);
2090                 return;
2091         }
2092
2093         /* remove VID from filter table */
2094         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2095                 index = (vid >> 5) & 0x7F;
2096                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2097                 vfta &= ~(1 << (vid & 0x1F));
2098                 hw->mac.ops.write_vfta(hw, index, vfta);
2099         }
2100 }
2101
2102 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2103 {
2104         struct net_device *netdev = adapter->netdev;
2105         u16 vid = adapter->hw.mng_cookie.vlan_id;
2106         u16 old_vid = adapter->mng_vlan_id;
2107
2108         if (!adapter->vlgrp)
2109                 return;
2110
2111         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2112                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2113                 if (adapter->hw.mng_cookie.status &
2114                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2115                         e1000_vlan_rx_add_vid(netdev, vid);
2116                         adapter->mng_vlan_id = vid;
2117                 }
2118
2119                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2120                                 (vid != old_vid) &&
2121                     !vlan_group_get_device(adapter->vlgrp, old_vid))
2122                         e1000_vlan_rx_kill_vid(netdev, old_vid);
2123         } else {
2124                 adapter->mng_vlan_id = vid;
2125         }
2126 }
2127
2128
2129 static void e1000_vlan_rx_register(struct net_device *netdev,
2130                                    struct vlan_group *grp)
2131 {
2132         struct e1000_adapter *adapter = netdev_priv(netdev);
2133         struct e1000_hw *hw = &adapter->hw;
2134         u32 ctrl, rctl;
2135
2136         if (!test_bit(__E1000_DOWN, &adapter->state))
2137                 e1000_irq_disable(adapter);
2138         adapter->vlgrp = grp;
2139
2140         if (grp) {
2141                 /* enable VLAN tag insert/strip */
2142                 ctrl = er32(CTRL);
2143                 ctrl |= E1000_CTRL_VME;
2144                 ew32(CTRL, ctrl);
2145
2146                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2147                         /* enable VLAN receive filtering */
2148                         rctl = er32(RCTL);
2149                         rctl &= ~E1000_RCTL_CFIEN;
2150                         ew32(RCTL, rctl);
2151                         e1000_update_mng_vlan(adapter);
2152                 }
2153         } else {
2154                 /* disable VLAN tag insert/strip */
2155                 ctrl = er32(CTRL);
2156                 ctrl &= ~E1000_CTRL_VME;
2157                 ew32(CTRL, ctrl);
2158
2159                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2160                         if (adapter->mng_vlan_id !=
2161                             (u16)E1000_MNG_VLAN_NONE) {
2162                                 e1000_vlan_rx_kill_vid(netdev,
2163                                                        adapter->mng_vlan_id);
2164                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2165                         }
2166                 }
2167         }
2168
2169         if (!test_bit(__E1000_DOWN, &adapter->state))
2170                 e1000_irq_enable(adapter);
2171 }
2172
2173 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2174 {
2175         u16 vid;
2176
2177         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2178
2179         if (!adapter->vlgrp)
2180                 return;
2181
2182         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2183                 if (!vlan_group_get_device(adapter->vlgrp, vid))
2184                         continue;
2185                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2186         }
2187 }
2188
2189 static void e1000_init_manageability(struct e1000_adapter *adapter)
2190 {
2191         struct e1000_hw *hw = &adapter->hw;
2192         u32 manc, manc2h;
2193
2194         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2195                 return;
2196
2197         manc = er32(MANC);
2198
2199         /*
2200          * enable receiving management packets to the host. this will probably
2201          * generate destination unreachable messages from the host OS, but
2202          * the packets will be handled on SMBUS
2203          */
2204         manc |= E1000_MANC_EN_MNG2HOST;
2205         manc2h = er32(MANC2H);
2206 #define E1000_MNG2HOST_PORT_623 (1 << 5)
2207 #define E1000_MNG2HOST_PORT_664 (1 << 6)
2208         manc2h |= E1000_MNG2HOST_PORT_623;
2209         manc2h |= E1000_MNG2HOST_PORT_664;
2210         ew32(MANC2H, manc2h);
2211         ew32(MANC, manc);
2212 }
2213
2214 /**
2215  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2216  * @adapter: board private structure
2217  *
2218  * Configure the Tx unit of the MAC after a reset.
2219  **/
2220 static void e1000_configure_tx(struct e1000_adapter *adapter)
2221 {
2222         struct e1000_hw *hw = &adapter->hw;
2223         struct e1000_ring *tx_ring = adapter->tx_ring;
2224         u64 tdba;
2225         u32 tdlen, tctl, tipg, tarc;
2226         u32 ipgr1, ipgr2;
2227
2228         /* Setup the HW Tx Head and Tail descriptor pointers */
2229         tdba = tx_ring->dma;
2230         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2231         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2232         ew32(TDBAH, (tdba >> 32));
2233         ew32(TDLEN, tdlen);
2234         ew32(TDH, 0);
2235         ew32(TDT, 0);
2236         tx_ring->head = E1000_TDH;
2237         tx_ring->tail = E1000_TDT;
2238
2239         /* Set the default values for the Tx Inter Packet Gap timer */
2240         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
2241         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
2242         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
2243
2244         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2245                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
2246
2247         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2248         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2249         ew32(TIPG, tipg);
2250
2251         /* Set the Tx Interrupt Delay register */
2252         ew32(TIDV, adapter->tx_int_delay);
2253         /* Tx irq moderation */
2254         ew32(TADV, adapter->tx_abs_int_delay);
2255
2256         /* Program the Transmit Control Register */
2257         tctl = er32(TCTL);
2258         tctl &= ~E1000_TCTL_CT;
2259         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2260                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2261
2262         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2263                 tarc = er32(TARC(0));
2264                 /*
2265                  * set the speed mode bit, we'll clear it if we're not at
2266                  * gigabit link later
2267                  */
2268 #define SPEED_MODE_BIT (1 << 21)
2269                 tarc |= SPEED_MODE_BIT;
2270                 ew32(TARC(0), tarc);
2271         }
2272
2273         /* errata: program both queues to unweighted RR */
2274         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2275                 tarc = er32(TARC(0));
2276                 tarc |= 1;
2277                 ew32(TARC(0), tarc);
2278                 tarc = er32(TARC(1));
2279                 tarc |= 1;
2280                 ew32(TARC(1), tarc);
2281         }
2282
2283         /* Setup Transmit Descriptor Settings for eop descriptor */
2284         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2285
2286         /* only set IDE if we are delaying interrupts using the timers */
2287         if (adapter->tx_int_delay)
2288                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2289
2290         /* enable Report Status bit */
2291         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2292
2293         ew32(TCTL, tctl);
2294
2295         e1000e_config_collision_dist(hw);
2296 }
2297
2298 /**
2299  * e1000_setup_rctl - configure the receive control registers
2300  * @adapter: Board private structure
2301  **/
2302 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2303                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2304 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2305 {
2306         struct e1000_hw *hw = &adapter->hw;
2307         u32 rctl, rfctl;
2308         u32 psrctl = 0;
2309         u32 pages = 0;
2310
2311         /* Program MC offset vector base */
2312         rctl = er32(RCTL);
2313         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2314         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2315                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2316                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2317
2318         /* Do not Store bad packets */
2319         rctl &= ~E1000_RCTL_SBP;
2320
2321         /* Enable Long Packet receive */
2322         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2323                 rctl &= ~E1000_RCTL_LPE;
2324         else
2325                 rctl |= E1000_RCTL_LPE;
2326
2327         /* Some systems expect that the CRC is included in SMBUS traffic. The
2328          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2329          * host memory when this is enabled
2330          */
2331         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2332                 rctl |= E1000_RCTL_SECRC;
2333
2334         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2335         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2336                 u16 phy_data;
2337
2338                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2339                 phy_data &= 0xfff8;
2340                 phy_data |= (1 << 2);
2341                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2342
2343                 e1e_rphy(hw, 22, &phy_data);
2344                 phy_data &= 0x0fff;
2345                 phy_data |= (1 << 14);
2346                 e1e_wphy(hw, 0x10, 0x2823);
2347                 e1e_wphy(hw, 0x11, 0x0003);
2348                 e1e_wphy(hw, 22, phy_data);
2349         }
2350
2351         /* Setup buffer sizes */
2352         rctl &= ~E1000_RCTL_SZ_4096;
2353         rctl |= E1000_RCTL_BSEX;
2354         switch (adapter->rx_buffer_len) {
2355         case 2048:
2356         default:
2357                 rctl |= E1000_RCTL_SZ_2048;
2358                 rctl &= ~E1000_RCTL_BSEX;
2359                 break;
2360         case 4096:
2361                 rctl |= E1000_RCTL_SZ_4096;
2362                 break;
2363         case 8192:
2364                 rctl |= E1000_RCTL_SZ_8192;
2365                 break;
2366         case 16384:
2367                 rctl |= E1000_RCTL_SZ_16384;
2368                 break;
2369         }
2370
2371         /*
2372          * 82571 and greater support packet-split where the protocol
2373          * header is placed in skb->data and the packet data is
2374          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2375          * In the case of a non-split, skb->data is linearly filled,
2376          * followed by the page buffers.  Therefore, skb->data is
2377          * sized to hold the largest protocol header.
2378          *
2379          * allocations using alloc_page take too long for regular MTU
2380          * so only enable packet split for jumbo frames
2381          *
2382          * Using pages when the page size is greater than 16k wastes
2383          * a lot of memory, since we allocate 3 pages at all times
2384          * per packet.
2385          */
2386         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2387         if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2388             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2389                 adapter->rx_ps_pages = pages;
2390         else
2391                 adapter->rx_ps_pages = 0;
2392
2393         if (adapter->rx_ps_pages) {
2394                 /* Configure extra packet-split registers */
2395                 rfctl = er32(RFCTL);
2396                 rfctl |= E1000_RFCTL_EXTEN;
2397                 /*
2398                  * disable packet split support for IPv6 extension headers,
2399                  * because some malformed IPv6 headers can hang the Rx
2400                  */
2401                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2402                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2403
2404                 ew32(RFCTL, rfctl);
2405
2406                 /* Enable Packet split descriptors */
2407                 rctl |= E1000_RCTL_DTYP_PS;
2408
2409                 psrctl |= adapter->rx_ps_bsize0 >>
2410                         E1000_PSRCTL_BSIZE0_SHIFT;
2411
2412                 switch (adapter->rx_ps_pages) {
2413                 case 3:
2414                         psrctl |= PAGE_SIZE <<
2415                                 E1000_PSRCTL_BSIZE3_SHIFT;
2416                 case 2:
2417                         psrctl |= PAGE_SIZE <<
2418                                 E1000_PSRCTL_BSIZE2_SHIFT;
2419                 case 1:
2420                         psrctl |= PAGE_SIZE >>
2421                                 E1000_PSRCTL_BSIZE1_SHIFT;
2422                         break;
2423                 }
2424
2425                 ew32(PSRCTL, psrctl);
2426         }
2427
2428         ew32(RCTL, rctl);
2429         /* just started the receive unit, no need to restart */
2430         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2431 }
2432
2433 /**
2434  * e1000_configure_rx - Configure Receive Unit after Reset
2435  * @adapter: board private structure
2436  *
2437  * Configure the Rx unit of the MAC after a reset.
2438  **/
2439 static void e1000_configure_rx(struct e1000_adapter *adapter)
2440 {
2441         struct e1000_hw *hw = &adapter->hw;
2442         struct e1000_ring *rx_ring = adapter->rx_ring;
2443         u64 rdba;
2444         u32 rdlen, rctl, rxcsum, ctrl_ext;
2445
2446         if (adapter->rx_ps_pages) {
2447                 /* this is a 32 byte descriptor */
2448                 rdlen = rx_ring->count *
2449                         sizeof(union e1000_rx_desc_packet_split);
2450                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2451                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2452         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2453                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2454                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2455                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2456         } else {
2457                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2458                 adapter->clean_rx = e1000_clean_rx_irq;
2459                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2460         }
2461
2462         /* disable receives while setting up the descriptors */
2463         rctl = er32(RCTL);
2464         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2465         e1e_flush();
2466         msleep(10);
2467
2468         /* set the Receive Delay Timer Register */
2469         ew32(RDTR, adapter->rx_int_delay);
2470
2471         /* irq moderation */
2472         ew32(RADV, adapter->rx_abs_int_delay);
2473         if (adapter->itr_setting != 0)
2474                 ew32(ITR, 1000000000 / (adapter->itr * 256));
2475
2476         ctrl_ext = er32(CTRL_EXT);
2477         /* Auto-Mask interrupts upon ICR access */
2478         ctrl_ext |= E1000_CTRL_EXT_IAME;
2479         ew32(IAM, 0xffffffff);
2480         ew32(CTRL_EXT, ctrl_ext);
2481         e1e_flush();
2482
2483         /*
2484          * Setup the HW Rx Head and Tail Descriptor Pointers and
2485          * the Base and Length of the Rx Descriptor Ring
2486          */
2487         rdba = rx_ring->dma;
2488         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
2489         ew32(RDBAH, (rdba >> 32));
2490         ew32(RDLEN, rdlen);
2491         ew32(RDH, 0);
2492         ew32(RDT, 0);
2493         rx_ring->head = E1000_RDH;
2494         rx_ring->tail = E1000_RDT;
2495
2496         /* Enable Receive Checksum Offload for TCP and UDP */
2497         rxcsum = er32(RXCSUM);
2498         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2499                 rxcsum |= E1000_RXCSUM_TUOFL;
2500
2501                 /*
2502                  * IPv4 payload checksum for UDP fragments must be
2503                  * used in conjunction with packet-split.
2504                  */
2505                 if (adapter->rx_ps_pages)
2506                         rxcsum |= E1000_RXCSUM_IPPCSE;
2507         } else {
2508                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2509                 /* no need to clear IPPCSE as it defaults to 0 */
2510         }
2511         ew32(RXCSUM, rxcsum);
2512
2513         /*
2514          * Enable early receives on supported devices, only takes effect when
2515          * packet size is equal or larger than the specified value (in 8 byte
2516          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2517          */
2518         if (adapter->flags & FLAG_HAS_ERT) {
2519                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2520                         u32 rxdctl = er32(RXDCTL(0));
2521                         ew32(RXDCTL(0), rxdctl | 0x3);
2522                         ew32(ERT, E1000_ERT_2048 | (1 << 13));
2523                         /*
2524                          * With jumbo frames and early-receive enabled,
2525                          * excessive C-state transition latencies result in
2526                          * dropped transactions.
2527                          */
2528                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2529                                                   adapter->netdev->name, 55);
2530                 } else {
2531                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2532                                                   adapter->netdev->name,
2533                                                   PM_QOS_DEFAULT_VALUE);
2534                 }
2535         }
2536
2537         /* Enable Receives */
2538         ew32(RCTL, rctl);
2539 }
2540
2541 /**
2542  *  e1000_update_mc_addr_list - Update Multicast addresses
2543  *  @hw: pointer to the HW structure
2544  *  @mc_addr_list: array of multicast addresses to program
2545  *  @mc_addr_count: number of multicast addresses to program
2546  *
2547  *  Updates the Multicast Table Array.
2548  *  The caller must have a packed mc_addr_list of multicast addresses.
2549  **/
2550 static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2551                                       u32 mc_addr_count)
2552 {
2553         hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count);
2554 }
2555
2556 /**
2557  * e1000_set_multi - Multicast and Promiscuous mode set
2558  * @netdev: network interface device structure
2559  *
2560  * The set_multi entry point is called whenever the multicast address
2561  * list or the network interface flags are updated.  This routine is
2562  * responsible for configuring the hardware for proper multicast,
2563  * promiscuous mode, and all-multi behavior.
2564  **/
2565 static void e1000_set_multi(struct net_device *netdev)
2566 {
2567         struct e1000_adapter *adapter = netdev_priv(netdev);
2568         struct e1000_hw *hw = &adapter->hw;
2569         struct netdev_hw_addr *ha;
2570         u8  *mta_list;
2571         u32 rctl;
2572         int i;
2573
2574         /* Check for Promiscuous and All Multicast modes */
2575
2576         rctl = er32(RCTL);
2577
2578         if (netdev->flags & IFF_PROMISC) {
2579                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2580                 rctl &= ~E1000_RCTL_VFE;
2581         } else {
2582                 if (netdev->flags & IFF_ALLMULTI) {
2583                         rctl |= E1000_RCTL_MPE;
2584                         rctl &= ~E1000_RCTL_UPE;
2585                 } else {
2586                         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2587                 }
2588                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
2589                         rctl |= E1000_RCTL_VFE;
2590         }
2591
2592         ew32(RCTL, rctl);
2593
2594         if (!netdev_mc_empty(netdev)) {
2595                 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
2596                 if (!mta_list)
2597                         return;
2598
2599                 /* prepare a packed array of only addresses. */
2600                 i = 0;
2601                 netdev_for_each_mc_addr(ha, netdev)
2602                         memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
2603
2604                 e1000_update_mc_addr_list(hw, mta_list, i);
2605                 kfree(mta_list);
2606         } else {
2607                 /*
2608                  * if we're called from probe, we might not have
2609                  * anything to do here, so clear out the list
2610                  */
2611                 e1000_update_mc_addr_list(hw, NULL, 0);
2612         }
2613 }
2614
2615 /**
2616  * e1000_configure - configure the hardware for Rx and Tx
2617  * @adapter: private board structure
2618  **/
2619 static void e1000_configure(struct e1000_adapter *adapter)
2620 {
2621         e1000_set_multi(adapter->netdev);
2622
2623         e1000_restore_vlan(adapter);
2624         e1000_init_manageability(adapter);
2625
2626         e1000_configure_tx(adapter);
2627         e1000_setup_rctl(adapter);
2628         e1000_configure_rx(adapter);
2629         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
2630 }
2631
2632 /**
2633  * e1000e_power_up_phy - restore link in case the phy was powered down
2634  * @adapter: address of board private structure
2635  *
2636  * The phy may be powered down to save power and turn off link when the
2637  * driver is unloaded and wake on lan is not enabled (among others)
2638  * *** this routine MUST be followed by a call to e1000e_reset ***
2639  **/
2640 void e1000e_power_up_phy(struct e1000_adapter *adapter)
2641 {
2642         if (adapter->hw.phy.ops.power_up)
2643                 adapter->hw.phy.ops.power_up(&adapter->hw);
2644
2645         adapter->hw.mac.ops.setup_link(&adapter->hw);
2646 }
2647
2648 /**
2649  * e1000_power_down_phy - Power down the PHY
2650  *
2651  * Power down the PHY so no link is implied when interface is down.
2652  * The PHY cannot be powered down if management or WoL is active.
2653  */
2654 static void e1000_power_down_phy(struct e1000_adapter *adapter)
2655 {
2656         /* WoL is enabled */
2657         if (adapter->wol)
2658                 return;
2659
2660         if (adapter->hw.phy.ops.power_down)
2661                 adapter->hw.phy.ops.power_down(&adapter->hw);
2662 }
2663
2664 /**
2665  * e1000e_reset - bring the hardware into a known good state
2666  *
2667  * This function boots the hardware and enables some settings that
2668  * require a configuration cycle of the hardware - those cannot be
2669  * set/changed during runtime. After reset the device needs to be
2670  * properly configured for Rx, Tx etc.
2671  */
2672 void e1000e_reset(struct e1000_adapter *adapter)
2673 {
2674         struct e1000_mac_info *mac = &adapter->hw.mac;
2675         struct e1000_fc_info *fc = &adapter->hw.fc;
2676         struct e1000_hw *hw = &adapter->hw;
2677         u32 tx_space, min_tx_space, min_rx_space;
2678         u32 pba = adapter->pba;
2679         u16 hwm;
2680
2681         /* reset Packet Buffer Allocation to default */
2682         ew32(PBA, pba);
2683
2684         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
2685                 /*
2686                  * To maintain wire speed transmits, the Tx FIFO should be
2687                  * large enough to accommodate two full transmit packets,
2688                  * rounded up to the next 1KB and expressed in KB.  Likewise,
2689                  * the Rx FIFO should be large enough to accommodate at least
2690                  * one full receive packet and is similarly rounded up and
2691                  * expressed in KB.
2692                  */
2693                 pba = er32(PBA);
2694                 /* upper 16 bits has Tx packet buffer allocation size in KB */
2695                 tx_space = pba >> 16;
2696                 /* lower 16 bits has Rx packet buffer allocation size in KB */
2697                 pba &= 0xffff;
2698                 /*
2699                  * the Tx fifo also stores 16 bytes of information about the tx
2700                  * but don't include ethernet FCS because hardware appends it
2701                  */
2702                 min_tx_space = (adapter->max_frame_size +
2703                                 sizeof(struct e1000_tx_desc) -
2704                                 ETH_FCS_LEN) * 2;
2705                 min_tx_space = ALIGN(min_tx_space, 1024);
2706                 min_tx_space >>= 10;
2707                 /* software strips receive CRC, so leave room for it */
2708                 min_rx_space = adapter->max_frame_size;
2709                 min_rx_space = ALIGN(min_rx_space, 1024);
2710                 min_rx_space >>= 10;
2711
2712                 /*
2713                  * If current Tx allocation is less than the min Tx FIFO size,
2714                  * and the min Tx FIFO size is less than the current Rx FIFO
2715                  * allocation, take space away from current Rx allocation
2716                  */
2717                 if ((tx_space < min_tx_space) &&
2718                     ((min_tx_space - tx_space) < pba)) {
2719                         pba -= min_tx_space - tx_space;
2720
2721                         /*
2722                          * if short on Rx space, Rx wins and must trump tx
2723                          * adjustment or use Early Receive if available
2724                          */
2725                         if ((pba < min_rx_space) &&
2726                             (!(adapter->flags & FLAG_HAS_ERT)))
2727                                 /* ERT enabled in e1000_configure_rx */
2728                                 pba = min_rx_space;
2729                 }
2730
2731                 ew32(PBA, pba);
2732         }
2733
2734
2735         /*
2736          * flow control settings
2737          *
2738          * The high water mark must be low enough to fit one full frame
2739          * (or the size used for early receive) above it in the Rx FIFO.
2740          * Set it to the lower of:
2741          * - 90% of the Rx FIFO size, and
2742          * - the full Rx FIFO size minus the early receive size (for parts
2743          *   with ERT support assuming ERT set to E1000_ERT_2048), or
2744          * - the full Rx FIFO size minus one full frame
2745          */
2746         if (hw->mac.type == e1000_pchlan) {
2747                 /*
2748                  * Workaround PCH LOM adapter hangs with certain network
2749                  * loads.  If hangs persist, try disabling Tx flow control.
2750                  */
2751                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2752                         fc->high_water = 0x3500;
2753                         fc->low_water  = 0x1500;
2754                 } else {
2755                         fc->high_water = 0x5000;
2756                         fc->low_water  = 0x3000;
2757                 }
2758         } else {
2759                 if ((adapter->flags & FLAG_HAS_ERT) &&
2760                     (adapter->netdev->mtu > ETH_DATA_LEN))
2761                         hwm = min(((pba << 10) * 9 / 10),
2762                                   ((pba << 10) - (E1000_ERT_2048 << 3)));
2763                 else
2764                         hwm = min(((pba << 10) * 9 / 10),
2765                                   ((pba << 10) - adapter->max_frame_size));
2766
2767                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
2768                 fc->low_water = fc->high_water - 8;
2769         }
2770
2771         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
2772                 fc->pause_time = 0xFFFF;
2773         else
2774                 fc->pause_time = E1000_FC_PAUSE_TIME;
2775         fc->send_xon = 1;
2776         fc->current_mode = fc->requested_mode;
2777
2778         /* Allow time for pending master requests to run */
2779         mac->ops.reset_hw(hw);
2780
2781         /*
2782          * For parts with AMT enabled, let the firmware know
2783          * that the network interface is in control
2784          */
2785         if (adapter->flags & FLAG_HAS_AMT)
2786                 e1000_get_hw_control(adapter);
2787
2788         ew32(WUC, 0);
2789         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)
2790                 e1e_wphy(&adapter->hw, BM_WUC, 0);
2791
2792         if (mac->ops.init_hw(hw))
2793                 e_err("Hardware Error\n");
2794
2795         /* additional part of the flow-control workaround above */
2796         if (hw->mac.type == e1000_pchlan)
2797                 ew32(FCRTV_PCH, 0x1000);
2798
2799         e1000_update_mng_vlan(adapter);
2800
2801         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
2802         ew32(VET, ETH_P_8021Q);
2803
2804         e1000e_reset_adaptive(hw);
2805         e1000_get_phy_info(hw);
2806
2807         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
2808             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
2809                 u16 phy_data = 0;
2810                 /*
2811                  * speed up time to link by disabling smart power down, ignore
2812                  * the return value of this function because there is nothing
2813                  * different we would do if it failed
2814                  */
2815                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
2816                 phy_data &= ~IGP02E1000_PM_SPD;
2817                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
2818         }
2819 }
2820
2821 int e1000e_up(struct e1000_adapter *adapter)
2822 {
2823         struct e1000_hw *hw = &adapter->hw;
2824
2825         /* DMA latency requirement to workaround early-receive/jumbo issue */
2826         if (adapter->flags & FLAG_HAS_ERT)
2827                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
2828                                        adapter->netdev->name,
2829                                        PM_QOS_DEFAULT_VALUE);
2830
2831         /* hardware has been reset, we need to reload some things */
2832         e1000_configure(adapter);
2833
2834         clear_bit(__E1000_DOWN, &adapter->state);
2835
2836         napi_enable(&adapter->napi);
2837         if (adapter->msix_entries)
2838                 e1000_configure_msix(adapter);
2839         e1000_irq_enable(adapter);
2840
2841         netif_wake_queue(adapter->netdev);
2842
2843         /* fire a link change interrupt to start the watchdog */
2844         ew32(ICS, E1000_ICS_LSC);
2845         return 0;
2846 }
2847
2848 void e1000e_down(struct e1000_adapter *adapter)
2849 {
2850         struct net_device *netdev = adapter->netdev;
2851         struct e1000_hw *hw = &adapter->hw;
2852         u32 tctl, rctl;
2853
2854         /*
2855          * signal that we're down so the interrupt handler does not
2856          * reschedule our watchdog timer
2857          */
2858         set_bit(__E1000_DOWN, &adapter->state);
2859
2860         /* disable receives in the hardware */
2861         rctl = er32(RCTL);
2862         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2863         /* flush and sleep below */
2864
2865         netif_stop_queue(netdev);
2866
2867         /* disable transmits in the hardware */
2868         tctl = er32(TCTL);
2869         tctl &= ~E1000_TCTL_EN;
2870         ew32(TCTL, tctl);
2871         /* flush both disables and wait for them to finish */
2872         e1e_flush();
2873         msleep(10);
2874
2875         napi_disable(&adapter->napi);
2876         e1000_irq_disable(adapter);
2877
2878         del_timer_sync(&adapter->watchdog_timer);
2879         del_timer_sync(&adapter->phy_info_timer);
2880
2881         netif_carrier_off(netdev);
2882         adapter->link_speed = 0;
2883         adapter->link_duplex = 0;
2884
2885         if (!pci_channel_offline(adapter->pdev))
2886                 e1000e_reset(adapter);
2887         e1000_clean_tx_ring(adapter);
2888         e1000_clean_rx_ring(adapter);
2889
2890         if (adapter->flags & FLAG_HAS_ERT)
2891                 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
2892                                           adapter->netdev->name);
2893
2894         /*
2895          * TODO: for power management, we could drop the link and
2896          * pci_disable_device here.
2897          */
2898 }
2899
2900 void e1000e_reinit_locked(struct e1000_adapter *adapter)
2901 {
2902         might_sleep();
2903         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
2904                 msleep(1);
2905         e1000e_down(adapter);
2906         e1000e_up(adapter);
2907         clear_bit(__E1000_RESETTING, &adapter->state);
2908 }
2909
2910 /**
2911  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
2912  * @adapter: board private structure to initialize
2913  *
2914  * e1000_sw_init initializes the Adapter private data structure.
2915  * Fields are initialized based on PCI device information and
2916  * OS network device settings (MTU size).
2917  **/
2918 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
2919 {
2920         struct net_device *netdev = adapter->netdev;
2921
2922         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
2923         adapter->rx_ps_bsize0 = 128;
2924         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2925         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
2926
2927         e1000e_set_interrupt_capability(adapter);
2928
2929         if (e1000_alloc_queues(adapter))
2930                 return -ENOMEM;
2931
2932         /* Explicitly disable IRQ since the NIC can be in any state. */
2933         e1000_irq_disable(adapter);
2934
2935         set_bit(__E1000_DOWN, &adapter->state);
2936         return 0;
2937 }
2938
2939 /**
2940  * e1000_intr_msi_test - Interrupt Handler
2941  * @irq: interrupt number
2942  * @data: pointer to a network interface device structure
2943  **/
2944 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
2945 {
2946         struct net_device *netdev = data;
2947         struct e1000_adapter *adapter = netdev_priv(netdev);
2948         struct e1000_hw *hw = &adapter->hw;
2949         u32 icr = er32(ICR);
2950
2951         e_dbg("icr is %08X\n", icr);
2952         if (icr & E1000_ICR_RXSEQ) {
2953                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
2954                 wmb();
2955         }
2956
2957         return IRQ_HANDLED;
2958 }
2959
2960 /**
2961  * e1000_test_msi_interrupt - Returns 0 for successful test
2962  * @adapter: board private struct
2963  *
2964  * code flow taken from tg3.c
2965  **/
2966 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
2967 {
2968         struct net_device *netdev = adapter->netdev;
2969         struct e1000_hw *hw = &adapter->hw;
2970         int err;
2971
2972         /* poll_enable hasn't been called yet, so don't need disable */
2973         /* clear any pending events */
2974         er32(ICR);
2975
2976         /* free the real vector and request a test handler */
2977         e1000_free_irq(adapter);
2978         e1000e_reset_interrupt_capability(adapter);
2979
2980         /* Assume that the test fails, if it succeeds then the test
2981          * MSI irq handler will unset this flag */
2982         adapter->flags |= FLAG_MSI_TEST_FAILED;
2983
2984         err = pci_enable_msi(adapter->pdev);
2985         if (err)
2986                 goto msi_test_failed;
2987
2988         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
2989                           netdev->name, netdev);
2990         if (err) {
2991                 pci_disable_msi(adapter->pdev);
2992                 goto msi_test_failed;
2993         }
2994
2995         wmb();
2996
2997         e1000_irq_enable(adapter);
2998
2999         /* fire an unusual interrupt on the test handler */
3000         ew32(ICS, E1000_ICS_RXSEQ);
3001         e1e_flush();
3002         msleep(50);
3003
3004         e1000_irq_disable(adapter);
3005
3006         rmb();
3007
3008         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3009                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3010                 err = -EIO;
3011                 e_info("MSI interrupt test failed!\n");
3012         }
3013
3014         free_irq(adapter->pdev->irq, netdev);
3015         pci_disable_msi(adapter->pdev);
3016
3017         if (err == -EIO)
3018                 goto msi_test_failed;
3019
3020         /* okay so the test worked, restore settings */
3021         e_dbg("MSI interrupt test succeeded!\n");
3022 msi_test_failed:
3023         e1000e_set_interrupt_capability(adapter);
3024         e1000_request_irq(adapter);
3025         return err;
3026 }
3027
3028 /**
3029  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3030  * @adapter: board private struct
3031  *
3032  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3033  **/
3034 static int e1000_test_msi(struct e1000_adapter *adapter)
3035 {
3036         int err;
3037         u16 pci_cmd;
3038
3039         if (!(adapter->flags & FLAG_MSI_ENABLED))
3040                 return 0;
3041
3042         /* disable SERR in case the MSI write causes a master abort */
3043         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3044         pci_write_config_word(adapter->pdev, PCI_COMMAND,
3045                               pci_cmd & ~PCI_COMMAND_SERR);
3046
3047         err = e1000_test_msi_interrupt(adapter);
3048
3049         /* restore previous setting of command word */
3050         pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3051
3052         /* success ! */
3053         if (!err)
3054                 return 0;
3055
3056         /* EIO means MSI test failed */
3057         if (err != -EIO)
3058                 return err;
3059
3060         /* back to INTx mode */
3061         e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3062
3063         e1000_free_irq(adapter);
3064
3065         err = e1000_request_irq(adapter);
3066
3067         return err;
3068 }
3069
3070 /**
3071  * e1000_open - Called when a network interface is made active
3072  * @netdev: network interface device structure
3073  *
3074  * Returns 0 on success, negative value on failure
3075  *
3076  * The open entry point is called when a network interface is made
3077  * active by the system (IFF_UP).  At this point all resources needed
3078  * for transmit and receive operations are allocated, the interrupt
3079  * handler is registered with the OS, the watchdog timer is started,
3080  * and the stack is notified that the interface is ready.
3081  **/
3082 static int e1000_open(struct net_device *netdev)
3083 {
3084         struct e1000_adapter *adapter = netdev_priv(netdev);
3085         struct e1000_hw *hw = &adapter->hw;
3086         struct pci_dev *pdev = adapter->pdev;
3087         int err;
3088
3089         /* disallow open during test */
3090         if (test_bit(__E1000_TESTING, &adapter->state))
3091                 return -EBUSY;
3092
3093         pm_runtime_get_sync(&pdev->dev);
3094
3095         netif_carrier_off(netdev);
3096
3097         /* allocate transmit descriptors */
3098         err = e1000e_setup_tx_resources(adapter);
3099         if (err)
3100                 goto err_setup_tx;
3101
3102         /* allocate receive descriptors */
3103         err = e1000e_setup_rx_resources(adapter);
3104         if (err)
3105                 goto err_setup_rx;
3106
3107         e1000e_power_up_phy(adapter);
3108
3109         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3110         if ((adapter->hw.mng_cookie.status &
3111              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3112                 e1000_update_mng_vlan(adapter);
3113
3114         /*
3115          * If AMT is enabled, let the firmware know that the network
3116          * interface is now open
3117          */
3118         if (adapter->flags & FLAG_HAS_AMT)
3119                 e1000_get_hw_control(adapter);
3120
3121         /*
3122          * before we allocate an interrupt, we must be ready to handle it.
3123          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3124          * as soon as we call pci_request_irq, so we have to setup our
3125          * clean_rx handler before we do so.
3126          */
3127         e1000_configure(adapter);
3128
3129         err = e1000_request_irq(adapter);
3130         if (err)
3131                 goto err_req_irq;
3132
3133         /*
3134          * Work around PCIe errata with MSI interrupts causing some chipsets to
3135          * ignore e1000e MSI messages, which means we need to test our MSI
3136          * interrupt now
3137          */
3138         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3139                 err = e1000_test_msi(adapter);
3140                 if (err) {
3141                         e_err("Interrupt allocation failed\n");
3142                         goto err_req_irq;
3143                 }
3144         }
3145
3146         /* From here on the code is the same as e1000e_up() */
3147         clear_bit(__E1000_DOWN, &adapter->state);
3148
3149         napi_enable(&adapter->napi);
3150
3151         e1000_irq_enable(adapter);
3152
3153         netif_start_queue(netdev);
3154
3155         adapter->idle_check = true;
3156         pm_runtime_put(&pdev->dev);
3157
3158         /* fire a link status change interrupt to start the watchdog */
3159         ew32(ICS, E1000_ICS_LSC);
3160
3161         return 0;
3162
3163 err_req_irq:
3164         e1000_release_hw_control(adapter);
3165         e1000_power_down_phy(adapter);
3166         e1000e_free_rx_resources(adapter);
3167 err_setup_rx:
3168         e1000e_free_tx_resources(adapter);
3169 err_setup_tx:
3170         e1000e_reset(adapter);
3171         pm_runtime_put_sync(&pdev->dev);
3172
3173         return err;
3174 }
3175
3176 /**
3177  * e1000_close - Disables a network interface
3178  * @netdev: network interface device structure
3179  *
3180  * Returns 0, this is not allowed to fail
3181  *
3182  * The close entry point is called when an interface is de-activated
3183  * by the OS.  The hardware is still under the drivers control, but
3184  * needs to be disabled.  A global MAC reset is issued to stop the
3185  * hardware, and all transmit and receive resources are freed.
3186  **/
3187 static int e1000_close(struct net_device *netdev)
3188 {
3189         struct e1000_adapter *adapter = netdev_priv(netdev);
3190         struct pci_dev *pdev = adapter->pdev;
3191
3192         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3193
3194         pm_runtime_get_sync(&pdev->dev);
3195
3196         if (!test_bit(__E1000_DOWN, &adapter->state)) {
3197                 e1000e_down(adapter);
3198                 e1000_free_irq(adapter);
3199         }
3200         e1000_power_down_phy(adapter);
3201
3202         e1000e_free_tx_resources(adapter);
3203         e1000e_free_rx_resources(adapter);
3204
3205         /*
3206          * kill manageability vlan ID if supported, but not if a vlan with
3207          * the same ID is registered on the host OS (let 8021q kill it)
3208          */
3209         if ((adapter->hw.mng_cookie.status &
3210                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3211              !(adapter->vlgrp &&
3212                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3213                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3214
3215         /*
3216          * If AMT is enabled, let the firmware know that the network
3217          * interface is now closed
3218          */
3219         if (adapter->flags & FLAG_HAS_AMT)
3220                 e1000_release_hw_control(adapter);
3221
3222         pm_runtime_put_sync(&pdev->dev);
3223
3224         return 0;
3225 }
3226 /**
3227  * e1000_set_mac - Change the Ethernet Address of the NIC
3228  * @netdev: network interface device structure
3229  * @p: pointer to an address structure
3230  *
3231  * Returns 0 on success, negative on failure
3232  **/
3233 static int e1000_set_mac(struct net_device *netdev, void *p)
3234 {
3235         struct e1000_adapter *adapter = netdev_priv(netdev);
3236         struct sockaddr *addr = p;
3237
3238         if (!is_valid_ether_addr(addr->sa_data))
3239                 return -EADDRNOTAVAIL;
3240
3241         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3242         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3243
3244         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3245
3246         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3247                 /* activate the work around */
3248                 e1000e_set_laa_state_82571(&adapter->hw, 1);
3249
3250                 /*
3251                  * Hold a copy of the LAA in RAR[14] This is done so that
3252                  * between the time RAR[0] gets clobbered  and the time it
3253                  * gets fixed (in e1000_watchdog), the actual LAA is in one
3254                  * of the RARs and no incoming packets directed to this port
3255                  * are dropped. Eventually the LAA will be in RAR[0] and
3256                  * RAR[14]
3257                  */
3258                 e1000e_rar_set(&adapter->hw,
3259                               adapter->hw.mac.addr,
3260                               adapter->hw.mac.rar_entry_count - 1);
3261         }
3262
3263         return 0;
3264 }
3265
3266 /**
3267  * e1000e_update_phy_task - work thread to update phy
3268  * @work: pointer to our work struct
3269  *
3270  * this worker thread exists because we must acquire a
3271  * semaphore to read the phy, which we could msleep while
3272  * waiting for it, and we can't msleep in a timer.
3273  **/
3274 static void e1000e_update_phy_task(struct work_struct *work)
3275 {
3276         struct e1000_adapter *adapter = container_of(work,
3277                                         struct e1000_adapter, update_phy_task);
3278         e1000_get_phy_info(&adapter->hw);
3279 }
3280
3281 /*
3282  * Need to wait a few seconds after link up to get diagnostic information from
3283  * the phy
3284  */
3285 static void e1000_update_phy_info(unsigned long data)
3286 {
3287         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3288         schedule_work(&adapter->update_phy_task);
3289 }
3290
3291 /**
3292  * e1000e_update_stats - Update the board statistics counters
3293  * @adapter: board private structure
3294  **/
3295 void e1000e_update_stats(struct e1000_adapter *adapter)
3296 {
3297         struct net_device *netdev = adapter->netdev;
3298         struct e1000_hw *hw = &adapter->hw;
3299         struct pci_dev *pdev = adapter->pdev;
3300         u16 phy_data;
3301
3302         /*
3303          * Prevent stats update while adapter is being reset, or if the pci
3304          * connection is down.
3305          */
3306         if (adapter->link_speed == 0)
3307                 return;
3308         if (pci_channel_offline(pdev))
3309                 return;
3310
3311         adapter->stats.crcerrs += er32(CRCERRS);
3312         adapter->stats.gprc += er32(GPRC);
3313         adapter->stats.gorc += er32(GORCL);
3314         er32(GORCH); /* Clear gorc */
3315         adapter->stats.bprc += er32(BPRC);
3316         adapter->stats.mprc += er32(MPRC);
3317         adapter->stats.roc += er32(ROC);
3318
3319         adapter->stats.mpc += er32(MPC);
3320         if ((hw->phy.type == e1000_phy_82578) ||
3321             (hw->phy.type == e1000_phy_82577)) {
3322                 e1e_rphy(hw, HV_SCC_UPPER, &phy_data);
3323                 if (!e1e_rphy(hw, HV_SCC_LOWER, &phy_data))
3324                         adapter->stats.scc += phy_data;
3325
3326                 e1e_rphy(hw, HV_ECOL_UPPER, &phy_data);
3327                 if (!e1e_rphy(hw, HV_ECOL_LOWER, &phy_data))
3328                         adapter->stats.ecol += phy_data;
3329
3330                 e1e_rphy(hw, HV_MCC_UPPER, &phy_data);
3331                 if (!e1e_rphy(hw, HV_MCC_LOWER, &phy_data))
3332                         adapter->stats.mcc += phy_data;
3333
3334                 e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data);
3335                 if (!e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data))
3336                         adapter->stats.latecol += phy_data;
3337
3338                 e1e_rphy(hw, HV_DC_UPPER, &phy_data);
3339                 if (!e1e_rphy(hw, HV_DC_LOWER, &phy_data))
3340                         adapter->stats.dc += phy_data;
3341         } else {
3342                 adapter->stats.scc += er32(SCC);
3343                 adapter->stats.ecol += er32(ECOL);
3344                 adapter->stats.mcc += er32(MCC);
3345                 adapter->stats.latecol += er32(LATECOL);
3346                 adapter->stats.dc += er32(DC);
3347         }
3348         adapter->stats.xonrxc += er32(XONRXC);
3349         adapter->stats.xontxc += er32(XONTXC);
3350         adapter->stats.xoffrxc += er32(XOFFRXC);
3351         adapter->stats.xofftxc += er32(XOFFTXC);
3352         adapter->stats.gptc += er32(GPTC);
3353         adapter->stats.gotc += er32(GOTCL);
3354         er32(GOTCH); /* Clear gotc */
3355         adapter->stats.rnbc += er32(RNBC);
3356         adapter->stats.ruc += er32(RUC);
3357
3358         adapter->stats.mptc += er32(MPTC);
3359         adapter->stats.bptc += er32(BPTC);
3360
3361         /* used for adaptive IFS */
3362
3363         hw->mac.tx_packet_delta = er32(TPT);
3364         adapter->stats.tpt += hw->mac.tx_packet_delta;
3365         if ((hw->phy.type == e1000_phy_82578) ||
3366             (hw->phy.type == e1000_phy_82577)) {
3367                 e1e_rphy(hw, HV_COLC_UPPER, &phy_data);
3368                 if (!e1e_rphy(hw, HV_COLC_LOWER, &phy_data))
3369                         hw->mac.collision_delta = phy_data;
3370         } else {
3371                 hw->mac.collision_delta = er32(COLC);
3372         }
3373         adapter->stats.colc += hw->mac.collision_delta;
3374
3375         adapter->stats.algnerrc += er32(ALGNERRC);
3376         adapter->stats.rxerrc += er32(RXERRC);
3377         if ((hw->phy.type == e1000_phy_82578) ||
3378             (hw->phy.type == e1000_phy_82577)) {
3379                 e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data);
3380                 if (!e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data))
3381                         adapter->stats.tncrs += phy_data;
3382         } else {
3383                 if ((hw->mac.type != e1000_82574) &&
3384                     (hw->mac.type != e1000_82583))
3385                         adapter->stats.tncrs += er32(TNCRS);
3386         }
3387         adapter->stats.cexterr += er32(CEXTERR);
3388         adapter->stats.tsctc += er32(TSCTC);
3389         adapter->stats.tsctfc += er32(TSCTFC);
3390
3391         /* Fill out the OS statistics structure */
3392         netdev->stats.multicast = adapter->stats.mprc;
3393         netdev->stats.collisions = adapter->stats.colc;
3394
3395         /* Rx Errors */
3396
3397         /*
3398          * RLEC on some newer hardware can be incorrect so build
3399          * our own version based on RUC and ROC
3400          */
3401         netdev->stats.rx_errors = adapter->stats.rxerrc +
3402                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3403                 adapter->stats.ruc + adapter->stats.roc +
3404                 adapter->stats.cexterr;
3405         netdev->stats.rx_length_errors = adapter->stats.ruc +
3406                                               adapter->stats.roc;
3407         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3408         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3409         netdev->stats.rx_missed_errors = adapter->stats.mpc;
3410
3411         /* Tx Errors */
3412         netdev->stats.tx_errors = adapter->stats.ecol +
3413                                        adapter->stats.latecol;
3414         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3415         netdev->stats.tx_window_errors = adapter->stats.latecol;
3416         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3417
3418         /* Tx Dropped needs to be maintained elsewhere */
3419
3420         /* Management Stats */
3421         adapter->stats.mgptc += er32(MGTPTC);
3422         adapter->stats.mgprc += er32(MGTPRC);
3423         adapter->stats.mgpdc += er32(MGTPDC);
3424 }
3425
3426 /**
3427  * e1000_phy_read_status - Update the PHY register status snapshot
3428  * @adapter: board private structure
3429  **/
3430 static void e1000_phy_read_status(struct e1000_adapter *adapter)
3431 {
3432         struct e1000_hw *hw = &adapter->hw;
3433         struct e1000_phy_regs *phy = &adapter->phy_regs;
3434         int ret_val;
3435
3436         if ((er32(STATUS) & E1000_STATUS_LU) &&
3437             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3438                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3439                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3440                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3441                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3442                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3443                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3444                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3445                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3446                 if (ret_val)
3447                         e_warn("Error reading PHY register\n");
3448         } else {
3449                 /*
3450                  * Do not read PHY registers if link is not up
3451                  * Set values to typical power-on defaults
3452                  */
3453                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3454                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3455                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3456                              BMSR_ERCAP);
3457                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3458                                   ADVERTISE_ALL | ADVERTISE_CSMA);
3459                 phy->lpa = 0;
3460                 phy->expansion = EXPANSION_ENABLENPAGE;
3461                 phy->ctrl1000 = ADVERTISE_1000FULL;
3462                 phy->stat1000 = 0;
3463                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3464         }
3465 }
3466
3467 static void e1000_print_link_info(struct e1000_adapter *adapter)
3468 {
3469         struct e1000_hw *hw = &adapter->hw;
3470         u32 ctrl = er32(CTRL);
3471
3472         /* Link status message must follow this format for user tools */
3473         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3474                "Flow Control: %s\n",
3475                adapter->netdev->name,
3476                adapter->link_speed,
3477                (adapter->link_duplex == FULL_DUPLEX) ?
3478                                 "Full Duplex" : "Half Duplex",
3479                ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3480                                 "RX/TX" :
3481                ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3482                ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
3483 }
3484
3485 bool e1000e_has_link(struct e1000_adapter *adapter)
3486 {
3487         struct e1000_hw *hw = &adapter->hw;
3488         bool link_active = 0;
3489         s32 ret_val = 0;
3490
3491         /*
3492          * get_link_status is set on LSC (link status) interrupt or
3493          * Rx sequence error interrupt.  get_link_status will stay
3494          * false until the check_for_link establishes link
3495          * for copper adapters ONLY
3496          */
3497         switch (hw->phy.media_type) {
3498         case e1000_media_type_copper:
3499                 if (hw->mac.get_link_status) {
3500                         ret_val = hw->mac.ops.check_for_link(hw);
3501                         link_active = !hw->mac.get_link_status;
3502                 } else {
3503                         link_active = 1;
3504                 }
3505                 break;
3506         case e1000_media_type_fiber:
3507                 ret_val = hw->mac.ops.check_for_link(hw);
3508                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3509                 break;
3510         case e1000_media_type_internal_serdes:
3511                 ret_val = hw->mac.ops.check_for_link(hw);
3512                 link_active = adapter->hw.mac.serdes_has_link;
3513                 break;
3514         default:
3515         case e1000_media_type_unknown:
3516                 break;
3517         }
3518
3519         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3520             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3521                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3522                 e_info("Gigabit has been disabled, downgrading speed\n");
3523         }
3524
3525         return link_active;
3526 }
3527
3528 static void e1000e_enable_receives(struct e1000_adapter *adapter)
3529 {
3530         /* make sure the receive unit is started */
3531         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3532             (adapter->flags & FLAG_RX_RESTART_NOW)) {
3533                 struct e1000_hw *hw = &adapter->hw;
3534                 u32 rctl = er32(RCTL);
3535                 ew32(RCTL, rctl | E1000_RCTL_EN);
3536                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3537         }
3538 }
3539
3540 /**
3541  * e1000_watchdog - Timer Call-back
3542  * @data: pointer to adapter cast into an unsigned long
3543  **/
3544 static void e1000_watchdog(unsigned long data)
3545 {
3546         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3547
3548         /* Do the rest outside of interrupt context */
3549         schedule_work(&adapter->watchdog_task);
3550
3551         /* TODO: make this use queue_delayed_work() */
3552 }
3553
3554 static void e1000_watchdog_task(struct work_struct *work)
3555 {
3556         struct e1000_adapter *adapter = container_of(work,
3557                                         struct e1000_adapter, watchdog_task);
3558         struct net_device *netdev = adapter->netdev;
3559         struct e1000_mac_info *mac = &adapter->hw.mac;
3560         struct e1000_phy_info *phy = &adapter->hw.phy;
3561         struct e1000_ring *tx_ring = adapter->tx_ring;
3562         struct e1000_hw *hw = &adapter->hw;
3563         u32 link, tctl;
3564         int tx_pending = 0;
3565
3566         link = e1000e_has_link(adapter);
3567         if ((netif_carrier_ok(netdev)) && link) {
3568                 /* Cancel scheduled suspend requests. */
3569                 pm_runtime_resume(netdev->dev.parent);
3570
3571                 e1000e_enable_receives(adapter);
3572                 goto link_up;
3573         }
3574
3575         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3576             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3577                 e1000_update_mng_vlan(adapter);
3578
3579         if (link) {
3580                 if (!netif_carrier_ok(netdev)) {
3581                         bool txb2b = 1;
3582
3583                         /* Cancel scheduled suspend requests. */
3584                         pm_runtime_resume(netdev->dev.parent);
3585
3586                         /* update snapshot of PHY registers on LSC */
3587                         e1000_phy_read_status(adapter);
3588                         mac->ops.get_link_up_info(&adapter->hw,
3589                                                    &adapter->link_speed,
3590                                                    &adapter->link_duplex);
3591                         e1000_print_link_info(adapter);
3592                         /*
3593                          * On supported PHYs, check for duplex mismatch only
3594                          * if link has autonegotiated at 10/100 half
3595                          */
3596                         if ((hw->phy.type == e1000_phy_igp_3 ||
3597                              hw->phy.type == e1000_phy_bm) &&
3598                             (hw->mac.autoneg == true) &&
3599                             (adapter->link_speed == SPEED_10 ||
3600                              adapter->link_speed == SPEED_100) &&
3601                             (adapter->link_duplex == HALF_DUPLEX)) {
3602                                 u16 autoneg_exp;
3603
3604                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3605
3606                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3607                                         e_info("Autonegotiated half duplex but"
3608                                                " link partner cannot autoneg. "
3609                                                " Try forcing full duplex if "
3610                                                "link gets many collisions.\n");
3611                         }
3612
3613                         /* adjust timeout factor according to speed/duplex */
3614                         adapter->tx_timeout_factor = 1;
3615                         switch (adapter->link_speed) {
3616                         case SPEED_10:
3617                                 txb2b = 0;
3618                                 adapter->tx_timeout_factor = 16;
3619                                 break;
3620                         case SPEED_100:
3621                                 txb2b = 0;
3622                                 adapter->tx_timeout_factor = 10;
3623                                 break;
3624                         }
3625
3626                         /*
3627                          * workaround: re-program speed mode bit after
3628                          * link-up event
3629                          */
3630                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
3631                             !txb2b) {
3632                                 u32 tarc0;
3633                                 tarc0 = er32(TARC(0));
3634                                 tarc0 &= ~SPEED_MODE_BIT;
3635                                 ew32(TARC(0), tarc0);
3636                         }
3637
3638                         /*
3639                          * disable TSO for pcie and 10/100 speeds, to avoid
3640                          * some hardware issues
3641                          */
3642                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
3643                                 switch (adapter->link_speed) {
3644                                 case SPEED_10:
3645                                 case SPEED_100:
3646                                         e_info("10/100 speed: disabling TSO\n");
3647                                         netdev->features &= ~NETIF_F_TSO;
3648                                         netdev->features &= ~NETIF_F_TSO6;
3649                                         break;
3650                                 case SPEED_1000:
3651                                         netdev->features |= NETIF_F_TSO;
3652                                         netdev->features |= NETIF_F_TSO6;
3653                                         break;
3654                                 default:
3655                                         /* oops */
3656                                         break;
3657                                 }
3658                         }
3659
3660                         /*
3661                          * enable transmits in the hardware, need to do this
3662                          * after setting TARC(0)
3663                          */
3664                         tctl = er32(TCTL);
3665                         tctl |= E1000_TCTL_EN;
3666                         ew32(TCTL, tctl);
3667
3668                         /*
3669                          * Perform any post-link-up configuration before
3670                          * reporting link up.
3671                          */
3672                         if (phy->ops.cfg_on_link_up)
3673                                 phy->ops.cfg_on_link_up(hw);
3674
3675                         netif_carrier_on(netdev);
3676
3677                         if (!test_bit(__E1000_DOWN, &adapter->state))
3678                                 mod_timer(&adapter->phy_info_timer,
3679                                           round_jiffies(jiffies + 2 * HZ));
3680                 }
3681         } else {
3682                 if (netif_carrier_ok(netdev)) {
3683                         adapter->link_speed = 0;
3684                         adapter->link_duplex = 0;
3685                         /* Link status message must follow this format */
3686                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
3687                                adapter->netdev->name);
3688                         netif_carrier_off(netdev);
3689                         if (!test_bit(__E1000_DOWN, &adapter->state))
3690                                 mod_timer(&adapter->phy_info_timer,
3691                                           round_jiffies(jiffies + 2 * HZ));
3692
3693                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
3694                                 schedule_work(&adapter->reset_task);
3695                         else
3696                                 pm_schedule_suspend(netdev->dev.parent,
3697                                                         LINK_TIMEOUT);
3698                 }
3699         }
3700
3701 link_up:
3702         e1000e_update_stats(adapter);
3703
3704         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
3705         adapter->tpt_old = adapter->stats.tpt;
3706         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
3707         adapter->colc_old = adapter->stats.colc;
3708
3709         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
3710         adapter->gorc_old = adapter->stats.gorc;
3711         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
3712         adapter->gotc_old = adapter->stats.gotc;
3713
3714         e1000e_update_adaptive(&adapter->hw);
3715
3716         if (!netif_carrier_ok(netdev)) {
3717                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
3718                                tx_ring->count);
3719                 if (tx_pending) {
3720                         /*
3721                          * We've lost link, so the controller stops DMA,
3722                          * but we've got queued Tx work that's never going
3723                          * to get done, so reset controller to flush Tx.
3724                          * (Do the reset outside of interrupt context).
3725                          */
3726                         adapter->tx_timeout_count++;
3727                         schedule_work(&adapter->reset_task);
3728                         /* return immediately since reset is imminent */
3729                         return;
3730                 }
3731         }
3732
3733         /* Cause software interrupt to ensure Rx ring is cleaned */
3734         if (adapter->msix_entries)
3735                 ew32(ICS, adapter->rx_ring->ims_val);
3736         else
3737                 ew32(ICS, E1000_ICS_RXDMT0);
3738
3739         /* Force detection of hung controller every watchdog period */
3740         adapter->detect_tx_hung = 1;
3741
3742         /*
3743          * With 82571 controllers, LAA may be overwritten due to controller
3744          * reset from the other port. Set the appropriate LAA in RAR[0]
3745          */
3746         if (e1000e_get_laa_state_82571(hw))
3747                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
3748
3749         /* Reset the timer */
3750         if (!test_bit(__E1000_DOWN, &adapter->state))
3751                 mod_timer(&adapter->watchdog_timer,
3752                           round_jiffies(jiffies + 2 * HZ));
3753 }
3754
3755 #define E1000_TX_FLAGS_CSUM             0x00000001
3756 #define E1000_TX_FLAGS_VLAN             0x00000002
3757 #define E1000_TX_FLAGS_TSO              0x00000004
3758 #define E1000_TX_FLAGS_IPV4             0x00000008
3759 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
3760 #define E1000_TX_FLAGS_VLAN_SHIFT       16
3761
3762 static int e1000_tso(struct e1000_adapter *adapter,
3763                      struct sk_buff *skb)
3764 {
3765         struct e1000_ring *tx_ring = adapter->tx_ring;
3766         struct e1000_context_desc *context_desc;
3767         struct e1000_buffer *buffer_info;
3768         unsigned int i;
3769         u32 cmd_length = 0;
3770         u16 ipcse = 0, tucse, mss;
3771         u8 ipcss, ipcso, tucss, tucso, hdr_len;
3772         int err;
3773
3774         if (!skb_is_gso(skb))
3775                 return 0;
3776
3777         if (skb_header_cloned(skb)) {
3778                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
3779                 if (err)
3780                         return err;
3781         }
3782
3783         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
3784         mss = skb_shinfo(skb)->gso_size;
3785         if (skb->protocol == htons(ETH_P_IP)) {
3786                 struct iphdr *iph = ip_hdr(skb);
3787                 iph->tot_len = 0;
3788                 iph->check = 0;
3789                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
3790                                                          0, IPPROTO_TCP, 0);
3791                 cmd_length = E1000_TXD_CMD_IP;
3792                 ipcse = skb_transport_offset(skb) - 1;
3793         } else if (skb_is_gso_v6(skb)) {
3794                 ipv6_hdr(skb)->payload_len = 0;
3795                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
3796                                                        &ipv6_hdr(skb)->daddr,
3797                                                        0, IPPROTO_TCP, 0);
3798                 ipcse = 0;
3799         }
3800         ipcss = skb_network_offset(skb);
3801         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
3802         tucss = skb_transport_offset(skb);
3803         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
3804         tucse = 0;
3805
3806         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
3807                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
3808
3809         i = tx_ring->next_to_use;
3810         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3811         buffer_info = &tx_ring->buffer_info[i];
3812
3813         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
3814         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
3815         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
3816         context_desc->upper_setup.tcp_fields.tucss = tucss;
3817         context_desc->upper_setup.tcp_fields.tucso = tucso;
3818         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
3819         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
3820         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
3821         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
3822
3823         buffer_info->time_stamp = jiffies;
3824         buffer_info->next_to_watch = i;
3825
3826         i++;
3827         if (i == tx_ring->count)
3828                 i = 0;
3829         tx_ring->next_to_use = i;
3830
3831         return 1;
3832 }
3833
3834 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
3835 {
3836         struct e1000_ring *tx_ring = adapter->tx_ring;
3837         struct e1000_context_desc *context_desc;
3838         struct e1000_buffer *buffer_info;
3839         unsigned int i;
3840         u8 css;
3841         u32 cmd_len = E1000_TXD_CMD_DEXT;
3842         __be16 protocol;
3843
3844         if (skb->ip_summed != CHECKSUM_PARTIAL)
3845                 return 0;
3846
3847         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
3848                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
3849         else
3850                 protocol = skb->protocol;
3851
3852         switch (protocol) {
3853         case cpu_to_be16(ETH_P_IP):
3854                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3855                         cmd_len |= E1000_TXD_CMD_TCP;
3856                 break;
3857         case cpu_to_be16(ETH_P_IPV6):
3858                 /* XXX not handling all IPV6 headers */
3859                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3860                         cmd_len |= E1000_TXD_CMD_TCP;
3861                 break;
3862         default:
3863                 if (unlikely(net_ratelimit()))
3864                         e_warn("checksum_partial proto=%x!\n",
3865                                be16_to_cpu(protocol));
3866                 break;
3867         }
3868
3869         css = skb_transport_offset(skb);
3870
3871         i = tx_ring->next_to_use;
3872         buffer_info = &tx_ring->buffer_info[i];
3873         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
3874
3875         context_desc->lower_setup.ip_config = 0;
3876         context_desc->upper_setup.tcp_fields.tucss = css;
3877         context_desc->upper_setup.tcp_fields.tucso =
3878                                 css + skb->csum_offset;
3879         context_desc->upper_setup.tcp_fields.tucse = 0;
3880         context_desc->tcp_seg_setup.data = 0;
3881         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
3882
3883         buffer_info->time_stamp = jiffies;
3884         buffer_info->next_to_watch = i;
3885
3886         i++;
3887         if (i == tx_ring->count)
3888                 i = 0;
3889         tx_ring->next_to_use = i;
3890
3891         return 1;
3892 }
3893
3894 #define E1000_MAX_PER_TXD       8192
3895 #define E1000_MAX_TXD_PWR       12
3896
3897 static int e1000_tx_map(struct e1000_adapter *adapter,
3898                         struct sk_buff *skb, unsigned int first,
3899                         unsigned int max_per_txd, unsigned int nr_frags,
3900                         unsigned int mss)
3901 {
3902         struct e1000_ring *tx_ring = adapter->tx_ring;
3903         struct pci_dev *pdev = adapter->pdev;
3904         struct e1000_buffer *buffer_info;
3905         unsigned int len = skb_headlen(skb);
3906         unsigned int offset = 0, size, count = 0, i;
3907         unsigned int f;
3908
3909         i = tx_ring->next_to_use;
3910
3911         while (len) {
3912                 buffer_info = &tx_ring->buffer_info[i];
3913                 size = min(len, max_per_txd);
3914
3915                 buffer_info->length = size;
3916                 buffer_info->time_stamp = jiffies;
3917                 buffer_info->next_to_watch = i;
3918                 buffer_info->dma = pci_map_single(pdev, skb->data + offset,
3919                                                   size, PCI_DMA_TODEVICE);
3920                 buffer_info->mapped_as_page = false;
3921                 if (pci_dma_mapping_error(pdev, buffer_info->dma))
3922                         goto dma_error;
3923
3924                 len -= size;
3925                 offset += size;
3926                 count++;
3927
3928                 if (len) {
3929                         i++;
3930                         if (i == tx_ring->count)
3931                                 i = 0;
3932                 }
3933         }
3934
3935         for (f = 0; f < nr_frags; f++) {
3936                 struct skb_frag_struct *frag;
3937
3938                 frag = &skb_shinfo(skb)->frags[f];
3939                 len = frag->size;
3940                 offset = frag->page_offset;
3941
3942                 while (len) {
3943                         i++;
3944                         if (i == tx_ring->count)
3945                                 i = 0;
3946
3947                         buffer_info = &tx_ring->buffer_info[i];
3948                         size = min(len, max_per_txd);
3949
3950                         buffer_info->length = size;
3951                         buffer_info->time_stamp = jiffies;
3952                         buffer_info->next_to_watch = i;
3953                         buffer_info->dma = pci_map_page(pdev, frag->page,
3954                                                         offset, size,
3955                                                         PCI_DMA_TODEVICE);
3956                         buffer_info->mapped_as_page = true;
3957                         if (pci_dma_mapping_error(pdev, buffer_info->dma))
3958                                 goto dma_error;
3959
3960                         len -= size;
3961                         offset += size;
3962                         count++;
3963                 }
3964         }
3965
3966         tx_ring->buffer_info[i].skb = skb;
3967         tx_ring->buffer_info[first].next_to_watch = i;
3968
3969         return count;
3970
3971 dma_error:
3972         dev_err(&pdev->dev, "TX DMA map failed\n");
3973         buffer_info->dma = 0;
3974         if (count)
3975                 count--;
3976
3977         while (count--) {
3978                 if (i==0)
3979                         i += tx_ring->count;
3980                 i--;
3981                 buffer_info = &tx_ring->buffer_info[i];
3982                 e1000_put_txbuf(adapter, buffer_info);;
3983         }
3984
3985         return 0;
3986 }
3987
3988 static void e1000_tx_queue(struct e1000_adapter *adapter,
3989                            int tx_flags, int count)
3990 {
3991         struct e1000_ring *tx_ring = adapter->tx_ring;
3992         struct e1000_tx_desc *tx_desc = NULL;
3993         struct e1000_buffer *buffer_info;
3994         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
3995         unsigned int i;
3996
3997         if (tx_flags & E1000_TX_FLAGS_TSO) {
3998                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
3999                              E1000_TXD_CMD_TSE;
4000                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4001
4002                 if (tx_flags & E1000_TX_FLAGS_IPV4)
4003                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4004         }
4005
4006         if (tx_flags & E1000_TX_FLAGS_CSUM) {
4007                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4008                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4009         }
4010
4011         if (tx_flags & E1000_TX_FLAGS_VLAN) {
4012                 txd_lower |= E1000_TXD_CMD_VLE;
4013                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4014         }
4015
4016         i = tx_ring->next_to_use;
4017
4018         while (count--) {
4019                 buffer_info = &tx_ring->buffer_info[i];
4020                 tx_desc = E1000_TX_DESC(*tx_ring, i);
4021                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4022                 tx_desc->lower.data =
4023                         cpu_to_le32(txd_lower | buffer_info->length);
4024                 tx_desc->upper.data = cpu_to_le32(txd_upper);
4025
4026                 i++;
4027                 if (i == tx_ring->count)
4028                         i = 0;
4029         }
4030
4031         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4032
4033         /*
4034          * Force memory writes to complete before letting h/w
4035          * know there are new descriptors to fetch.  (Only
4036          * applicable for weak-ordered memory model archs,
4037          * such as IA-64).
4038          */
4039         wmb();
4040
4041         tx_ring->next_to_use = i;
4042         writel(i, adapter->hw.hw_addr + tx_ring->tail);
4043         /*
4044          * we need this if more than one processor can write to our tail
4045          * at a time, it synchronizes IO on IA64/Altix systems
4046          */
4047         mmiowb();
4048 }
4049
4050 #define MINIMUM_DHCP_PACKET_SIZE 282
4051 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4052                                     struct sk_buff *skb)
4053 {
4054         struct e1000_hw *hw =  &adapter->hw;
4055         u16 length, offset;
4056
4057         if (vlan_tx_tag_present(skb)) {
4058                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4059                     (adapter->hw.mng_cookie.status &
4060                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4061                         return 0;
4062         }
4063
4064         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4065                 return 0;
4066
4067         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4068                 return 0;
4069
4070         {
4071                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4072                 struct udphdr *udp;
4073
4074                 if (ip->protocol != IPPROTO_UDP)
4075                         return 0;
4076
4077                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4078                 if (ntohs(udp->dest) != 67)
4079                         return 0;
4080
4081                 offset = (u8 *)udp + 8 - skb->data;
4082                 length = skb->len - offset;
4083                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4084         }
4085
4086         return 0;
4087 }
4088
4089 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4090 {
4091         struct e1000_adapter *adapter = netdev_priv(netdev);
4092
4093         netif_stop_queue(netdev);
4094         /*
4095          * Herbert's original patch had:
4096          *  smp_mb__after_netif_stop_queue();
4097          * but since that doesn't exist yet, just open code it.
4098          */
4099         smp_mb();
4100
4101         /*
4102          * We need to check again in a case another CPU has just
4103          * made room available.
4104          */
4105         if (e1000_desc_unused(adapter->tx_ring) < size)
4106                 return -EBUSY;
4107
4108         /* A reprieve! */
4109         netif_start_queue(netdev);
4110         ++adapter->restart_queue;
4111         return 0;
4112 }
4113
4114 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4115 {
4116         struct e1000_adapter *adapter = netdev_priv(netdev);
4117
4118         if (e1000_desc_unused(adapter->tx_ring) >= size)
4119                 return 0;
4120         return __e1000_maybe_stop_tx(netdev, size);
4121 }
4122
4123 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4124 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4125                                     struct net_device *netdev)
4126 {
4127         struct e1000_adapter *adapter = netdev_priv(netdev);
4128         struct e1000_ring *tx_ring = adapter->tx_ring;
4129         unsigned int first;
4130         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4131         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4132         unsigned int tx_flags = 0;
4133         unsigned int len = skb->len - skb->data_len;
4134         unsigned int nr_frags;
4135         unsigned int mss;
4136         int count = 0;
4137         int tso;
4138         unsigned int f;
4139
4140         if (test_bit(__E1000_DOWN, &adapter->state)) {
4141                 dev_kfree_skb_any(skb);
4142                 return NETDEV_TX_OK;
4143         }
4144
4145         if (skb->len <= 0) {
4146                 dev_kfree_skb_any(skb);
4147                 return NETDEV_TX_OK;
4148         }
4149
4150         mss = skb_shinfo(skb)->gso_size;
4151         /*
4152          * The controller does a simple calculation to
4153          * make sure there is enough room in the FIFO before
4154          * initiating the DMA for each buffer.  The calc is:
4155          * 4 = ceil(buffer len/mss).  To make sure we don't
4156          * overrun the FIFO, adjust the max buffer len if mss
4157          * drops.
4158          */
4159         if (mss) {
4160                 u8 hdr_len;
4161                 max_per_txd = min(mss << 2, max_per_txd);
4162                 max_txd_pwr = fls(max_per_txd) - 1;
4163
4164                 /*
4165                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4166                  * points to just header, pull a few bytes of payload from
4167                  * frags into skb->data
4168                  */
4169                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4170                 /*
4171                  * we do this workaround for ES2LAN, but it is un-necessary,
4172                  * avoiding it could save a lot of cycles
4173                  */
4174                 if (skb->data_len && (hdr_len == len)) {
4175                         unsigned int pull_size;
4176
4177                         pull_size = min((unsigned int)4, skb->data_len);
4178                         if (!__pskb_pull_tail(skb, pull_size)) {
4179                                 e_err("__pskb_pull_tail failed.\n");
4180                                 dev_kfree_skb_any(skb);
4181                                 return NETDEV_TX_OK;
4182                         }
4183                         len = skb->len - skb->data_len;
4184                 }
4185         }
4186
4187         /* reserve a descriptor for the offload context */
4188         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4189                 count++;
4190         count++;
4191
4192         count += TXD_USE_COUNT(len, max_txd_pwr);
4193
4194         nr_frags = skb_shinfo(skb)->nr_frags;
4195         for (f = 0; f < nr_frags; f++)
4196                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4197                                        max_txd_pwr);
4198
4199         if (adapter->hw.mac.tx_pkt_filtering)
4200                 e1000_transfer_dhcp_info(adapter, skb);
4201
4202         /*
4203          * need: count + 2 desc gap to keep tail from touching
4204          * head, otherwise try next time
4205          */
4206         if (e1000_maybe_stop_tx(netdev, count + 2))
4207                 return NETDEV_TX_BUSY;
4208
4209         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4210                 tx_flags |= E1000_TX_FLAGS_VLAN;
4211                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4212         }
4213
4214         first = tx_ring->next_to_use;
4215
4216         tso = e1000_tso(adapter, skb);
4217         if (tso < 0) {
4218                 dev_kfree_skb_any(skb);
4219                 return NETDEV_TX_OK;
4220         }
4221
4222         if (tso)
4223                 tx_flags |= E1000_TX_FLAGS_TSO;
4224         else if (e1000_tx_csum(adapter, skb))
4225                 tx_flags |= E1000_TX_FLAGS_CSUM;
4226
4227         /*
4228          * Old method was to assume IPv4 packet by default if TSO was enabled.
4229          * 82571 hardware supports TSO capabilities for IPv6 as well...
4230          * no longer assume, we must.
4231          */
4232         if (skb->protocol == htons(ETH_P_IP))
4233                 tx_flags |= E1000_TX_FLAGS_IPV4;
4234
4235         /* if count is 0 then mapping error has occured */
4236         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
4237         if (count) {
4238                 e1000_tx_queue(adapter, tx_flags, count);
4239                 /* Make sure there is space in the ring for the next send. */
4240                 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4241
4242         } else {
4243                 dev_kfree_skb_any(skb);
4244                 tx_ring->buffer_info[first].time_stamp = 0;
4245                 tx_ring->next_to_use = first;
4246         }
4247
4248         return NETDEV_TX_OK;
4249 }
4250
4251 /**
4252  * e1000_tx_timeout - Respond to a Tx Hang
4253  * @netdev: network interface device structure
4254  **/
4255 static void e1000_tx_timeout(struct net_device *netdev)
4256 {
4257         struct e1000_adapter *adapter = netdev_priv(netdev);
4258
4259         /* Do the reset outside of interrupt context */
4260         adapter->tx_timeout_count++;
4261         schedule_work(&adapter->reset_task);
4262 }
4263
4264 static void e1000_reset_task(struct work_struct *work)
4265 {
4266         struct e1000_adapter *adapter;
4267         adapter = container_of(work, struct e1000_adapter, reset_task);
4268
4269         e1000e_reinit_locked(adapter);
4270 }
4271
4272 /**
4273  * e1000_get_stats - Get System Network Statistics
4274  * @netdev: network interface device structure
4275  *
4276  * Returns the address of the device statistics structure.
4277  * The statistics are actually updated from the timer callback.
4278  **/
4279 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4280 {
4281         /* only return the current stats */
4282         return &netdev->stats;
4283 }
4284
4285 /**
4286  * e1000_change_mtu - Change the Maximum Transfer Unit
4287  * @netdev: network interface device structure
4288  * @new_mtu: new value for maximum frame size
4289  *
4290  * Returns 0 on success, negative on failure
4291  **/
4292 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4293 {
4294         struct e1000_adapter *adapter = netdev_priv(netdev);
4295         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4296
4297         /* Jumbo frame support */
4298         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
4299             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
4300                 e_err("Jumbo Frames not supported.\n");
4301                 return -EINVAL;
4302         }
4303
4304         /* Supported frame sizes */
4305         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
4306             (max_frame > adapter->max_hw_frame_size)) {
4307                 e_err("Unsupported MTU setting\n");
4308                 return -EINVAL;
4309         }
4310
4311         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4312                 msleep(1);
4313         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4314         adapter->max_frame_size = max_frame;
4315         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4316         netdev->mtu = new_mtu;
4317         if (netif_running(netdev))
4318                 e1000e_down(adapter);
4319
4320         /*
4321          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4322          * means we reserve 2 more, this pushes us to allocate from the next
4323          * larger slab size.
4324          * i.e. RXBUFFER_2048 --> size-4096 slab
4325          * However with the new *_jumbo_rx* routines, jumbo receives will use
4326          * fragmented skbs
4327          */
4328
4329         if (max_frame <= 2048)
4330                 adapter->rx_buffer_len = 2048;
4331         else
4332                 adapter->rx_buffer_len = 4096;
4333
4334         /* adjust allocation if LPE protects us, and we aren't using SBP */
4335         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4336              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4337                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
4338                                          + ETH_FCS_LEN;
4339
4340         if (netif_running(netdev))
4341                 e1000e_up(adapter);
4342         else
4343                 e1000e_reset(adapter);
4344
4345         clear_bit(__E1000_RESETTING, &adapter->state);
4346
4347         return 0;
4348 }
4349
4350 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4351                            int cmd)
4352 {
4353         struct e1000_adapter *adapter = netdev_priv(netdev);
4354         struct mii_ioctl_data *data = if_mii(ifr);
4355
4356         if (adapter->hw.phy.media_type != e1000_media_type_copper)
4357                 return -EOPNOTSUPP;
4358
4359         switch (cmd) {
4360         case SIOCGMIIPHY:
4361                 data->phy_id = adapter->hw.phy.addr;
4362                 break;
4363         case SIOCGMIIREG:
4364                 e1000_phy_read_status(adapter);
4365
4366                 switch (data->reg_num & 0x1F) {
4367                 case MII_BMCR:
4368                         data->val_out = adapter->phy_regs.bmcr;
4369                         break;
4370                 case MII_BMSR:
4371                         data->val_out = adapter->phy_regs.bmsr;
4372                         break;
4373                 case MII_PHYSID1:
4374                         data->val_out = (adapter->hw.phy.id >> 16);
4375                         break;
4376                 case MII_PHYSID2:
4377                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
4378                         break;
4379                 case MII_ADVERTISE:
4380                         data->val_out = adapter->phy_regs.advertise;
4381                         break;
4382                 case MII_LPA:
4383                         data->val_out = adapter->phy_regs.lpa;
4384                         break;
4385                 case MII_EXPANSION:
4386                         data->val_out = adapter->phy_regs.expansion;
4387                         break;
4388                 case MII_CTRL1000:
4389                         data->val_out = adapter->phy_regs.ctrl1000;
4390                         break;
4391                 case MII_STAT1000:
4392                         data->val_out = adapter->phy_regs.stat1000;
4393                         break;
4394                 case MII_ESTATUS:
4395                         data->val_out = adapter->phy_regs.estatus;
4396                         break;
4397                 default:
4398                         return -EIO;
4399                 }
4400                 break;
4401         case SIOCSMIIREG:
4402         default:
4403                 return -EOPNOTSUPP;
4404         }
4405         return 0;
4406 }
4407
4408 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4409 {
4410         switch (cmd) {
4411         case SIOCGMIIPHY:
4412         case SIOCGMIIREG:
4413         case SIOCSMIIREG:
4414                 return e1000_mii_ioctl(netdev, ifr, cmd);
4415         default:
4416                 return -EOPNOTSUPP;
4417         }
4418 }
4419
4420 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
4421 {
4422         struct e1000_hw *hw = &adapter->hw;
4423         u32 i, mac_reg;
4424         u16 phy_reg;
4425         int retval = 0;
4426
4427         /* copy MAC RARs to PHY RARs */
4428         for (i = 0; i < adapter->hw.mac.rar_entry_count; i++) {
4429                 mac_reg = er32(RAL(i));
4430                 e1e_wphy(hw, BM_RAR_L(i), (u16)(mac_reg & 0xFFFF));
4431                 e1e_wphy(hw, BM_RAR_M(i), (u16)((mac_reg >> 16) & 0xFFFF));
4432                 mac_reg = er32(RAH(i));
4433                 e1e_wphy(hw, BM_RAR_H(i), (u16)(mac_reg & 0xFFFF));
4434                 e1e_wphy(hw, BM_RAR_CTRL(i), (u16)((mac_reg >> 16) & 0xFFFF));
4435         }
4436
4437         /* copy MAC MTA to PHY MTA */
4438         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
4439                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
4440                 e1e_wphy(hw, BM_MTA(i), (u16)(mac_reg & 0xFFFF));
4441                 e1e_wphy(hw, BM_MTA(i) + 1, (u16)((mac_reg >> 16) & 0xFFFF));
4442         }
4443
4444         /* configure PHY Rx Control register */
4445         e1e_rphy(&adapter->hw, BM_RCTL, &phy_reg);
4446         mac_reg = er32(RCTL);
4447         if (mac_reg & E1000_RCTL_UPE)
4448                 phy_reg |= BM_RCTL_UPE;
4449         if (mac_reg & E1000_RCTL_MPE)
4450                 phy_reg |= BM_RCTL_MPE;
4451         phy_reg &= ~(BM_RCTL_MO_MASK);
4452         if (mac_reg & E1000_RCTL_MO_3)
4453                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
4454                                 << BM_RCTL_MO_SHIFT);
4455         if (mac_reg & E1000_RCTL_BAM)
4456                 phy_reg |= BM_RCTL_BAM;
4457         if (mac_reg & E1000_RCTL_PMCF)
4458                 phy_reg |= BM_RCTL_PMCF;
4459         mac_reg = er32(CTRL);
4460         if (mac_reg & E1000_CTRL_RFCE)
4461                 phy_reg |= BM_RCTL_RFCE;
4462         e1e_wphy(&adapter->hw, BM_RCTL, phy_reg);
4463
4464         /* enable PHY wakeup in MAC register */
4465         ew32(WUFC, wufc);
4466         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
4467
4468         /* configure and enable PHY wakeup in PHY registers */
4469         e1e_wphy(&adapter->hw, BM_WUFC, wufc);
4470         e1e_wphy(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
4471
4472         /* activate PHY wakeup */
4473         retval = hw->phy.ops.acquire(hw);
4474         if (retval) {
4475                 e_err("Could not acquire PHY\n");
4476                 return retval;
4477         }
4478         e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4479                                  (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
4480         retval = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
4481         if (retval) {
4482                 e_err("Could not read PHY page 769\n");
4483                 goto out;
4484         }
4485         phy_reg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
4486         retval = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
4487         if (retval)
4488                 e_err("Could not set PHY Host Wakeup bit\n");
4489 out:
4490         hw->phy.ops.release(hw);
4491
4492         return retval;
4493 }
4494
4495 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
4496                             bool runtime)
4497 {
4498         struct net_device *netdev = pci_get_drvdata(pdev);
4499         struct e1000_adapter *adapter = netdev_priv(netdev);
4500         struct e1000_hw *hw = &adapter->hw;
4501         u32 ctrl, ctrl_ext, rctl, status;
4502         /* Runtime suspend should only enable wakeup for link changes */
4503         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
4504         int retval = 0;
4505
4506         netif_device_detach(netdev);
4507
4508         if (netif_running(netdev)) {
4509                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4510                 e1000e_down(adapter);
4511                 e1000_free_irq(adapter);
4512         }
4513         e1000e_reset_interrupt_capability(adapter);
4514
4515         retval = pci_save_state(pdev);
4516         if (retval)
4517                 return retval;
4518
4519         status = er32(STATUS);
4520         if (status & E1000_STATUS_LU)
4521                 wufc &= ~E1000_WUFC_LNKC;
4522
4523         if (wufc) {
4524                 e1000_setup_rctl(adapter);
4525                 e1000_set_multi(netdev);
4526
4527                 /* turn on all-multi mode if wake on multicast is enabled */
4528                 if (wufc & E1000_WUFC_MC) {
4529                         rctl = er32(RCTL);
4530                         rctl |= E1000_RCTL_MPE;
4531                         ew32(RCTL, rctl);
4532                 }
4533
4534                 ctrl = er32(CTRL);
4535                 /* advertise wake from D3Cold */
4536                 #define E1000_CTRL_ADVD3WUC 0x00100000
4537                 /* phy power management enable */
4538                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4539                 ctrl |= E1000_CTRL_ADVD3WUC;
4540                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
4541                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
4542                 ew32(CTRL, ctrl);
4543
4544                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4545                     adapter->hw.phy.media_type ==
4546                     e1000_media_type_internal_serdes) {
4547                         /* keep the laser running in D3 */
4548                         ctrl_ext = er32(CTRL_EXT);
4549                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
4550                         ew32(CTRL_EXT, ctrl_ext);
4551                 }
4552
4553                 if (adapter->flags & FLAG_IS_ICH)
4554                         e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4555
4556                 /* Allow time for pending master requests to run */
4557                 e1000e_disable_pcie_master(&adapter->hw);
4558
4559                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4560                         /* enable wakeup by the PHY */
4561                         retval = e1000_init_phy_wakeup(adapter, wufc);
4562                         if (retval)
4563                                 return retval;
4564                 } else {
4565                         /* enable wakeup by the MAC */
4566                         ew32(WUFC, wufc);
4567                         ew32(WUC, E1000_WUC_PME_EN);
4568                 }
4569         } else {
4570                 ew32(WUC, 0);
4571                 ew32(WUFC, 0);
4572         }
4573
4574         *enable_wake = !!wufc;
4575
4576         /* make sure adapter isn't asleep if manageability is enabled */
4577         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
4578             (hw->mac.ops.check_mng_mode(hw)))
4579                 *enable_wake = true;
4580
4581         if (adapter->hw.phy.type == e1000_phy_igp_3)
4582                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
4583
4584         /*
4585          * Release control of h/w to f/w.  If f/w is AMT enabled, this
4586          * would have already happened in close and is redundant.
4587          */
4588         e1000_release_hw_control(adapter);
4589
4590         pci_disable_device(pdev);
4591
4592         return 0;
4593 }
4594
4595 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
4596 {
4597         if (sleep && wake) {
4598                 pci_prepare_to_sleep(pdev);
4599                 return;
4600         }
4601
4602         pci_wake_from_d3(pdev, wake);
4603         pci_set_power_state(pdev, PCI_D3hot);
4604 }
4605
4606 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
4607                                     bool wake)
4608 {
4609         struct net_device *netdev = pci_get_drvdata(pdev);
4610         struct e1000_adapter *adapter = netdev_priv(netdev);
4611
4612         /*
4613          * The pci-e switch on some quad port adapters will report a
4614          * correctable error when the MAC transitions from D0 to D3.  To
4615          * prevent this we need to mask off the correctable errors on the
4616          * downstream port of the pci-e switch.
4617          */
4618         if (adapter->flags & FLAG_IS_QUAD_PORT) {
4619                 struct pci_dev *us_dev = pdev->bus->self;
4620                 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
4621                 u16 devctl;
4622
4623                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
4624                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
4625                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
4626
4627                 e1000_power_off(pdev, sleep, wake);
4628
4629                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
4630         } else {
4631                 e1000_power_off(pdev, sleep, wake);
4632         }
4633 }
4634
4635 static void e1000e_disable_l1aspm(struct pci_dev *pdev)
4636 {
4637         int pos;
4638         u16 val;
4639
4640         /*
4641          * 82573 workaround - disable L1 ASPM on mobile chipsets
4642          *
4643          * L1 ASPM on various mobile (ich7) chipsets do not behave properly
4644          * resulting in lost data or garbage information on the pci-e link
4645          * level. This could result in (false) bad EEPROM checksum errors,
4646          * long ping times (up to 2s) or even a system freeze/hang.
4647          *
4648          * Unfortunately this feature saves about 1W power consumption when
4649          * active.
4650          */
4651         pos = pci_find_capability(pdev, PCI_CAP_ID_EXP);
4652         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &val);
4653         if (val & 0x2) {
4654                 dev_warn(&pdev->dev, "Disabling L1 ASPM\n");
4655                 val &= ~0x2;
4656                 pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, val);
4657         }
4658 }
4659
4660 #ifdef CONFIG_PM_OPS
4661 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
4662 {
4663         return !!adapter->tx_ring->buffer_info;
4664 }
4665
4666 static int __e1000_resume(struct pci_dev *pdev)
4667 {
4668         struct net_device *netdev = pci_get_drvdata(pdev);
4669         struct e1000_adapter *adapter = netdev_priv(netdev);
4670         struct e1000_hw *hw = &adapter->hw;
4671         u32 err;
4672
4673         e1000e_disable_l1aspm(pdev);
4674
4675         e1000e_set_interrupt_capability(adapter);
4676         if (netif_running(netdev)) {
4677                 err = e1000_request_irq(adapter);
4678                 if (err)
4679                         return err;
4680         }
4681
4682         e1000e_power_up_phy(adapter);
4683
4684         /* report the system wakeup cause from S3/S4 */
4685         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4686                 u16 phy_data;
4687
4688                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
4689                 if (phy_data) {
4690                         e_info("PHY Wakeup cause - %s\n",
4691                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
4692                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
4693                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
4694                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
4695                                 phy_data & E1000_WUS_LNKC ? "Link Status "
4696                                 " Change" : "other");
4697                 }
4698                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
4699         } else {
4700                 u32 wus = er32(WUS);
4701                 if (wus) {
4702                         e_info("MAC Wakeup cause - %s\n",
4703                                 wus & E1000_WUS_EX ? "Unicast Packet" :
4704                                 wus & E1000_WUS_MC ? "Multicast Packet" :
4705                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
4706                                 wus & E1000_WUS_MAG ? "Magic Packet" :
4707                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
4708                                 "other");
4709                 }
4710                 ew32(WUS, ~0);
4711         }
4712
4713         e1000e_reset(adapter);
4714
4715         e1000_init_manageability(adapter);
4716
4717         if (netif_running(netdev))
4718                 e1000e_up(adapter);
4719
4720         netif_device_attach(netdev);
4721
4722         /*
4723          * If the controller has AMT, do not set DRV_LOAD until the interface
4724          * is up.  For all other cases, let the f/w know that the h/w is now
4725          * under the control of the driver.
4726          */
4727         if (!(adapter->flags & FLAG_HAS_AMT))
4728                 e1000_get_hw_control(adapter);
4729
4730         return 0;
4731 }
4732
4733 #ifdef CONFIG_PM_SLEEP
4734 static int e1000_suspend(struct device *dev)
4735 {
4736         struct pci_dev *pdev = to_pci_dev(dev);
4737         int retval;
4738         bool wake;
4739
4740         retval = __e1000_shutdown(pdev, &wake, false);
4741         if (!retval)
4742                 e1000_complete_shutdown(pdev, true, wake);
4743
4744         return retval;
4745 }
4746
4747 static int e1000_resume(struct device *dev)
4748 {
4749         struct pci_dev *pdev = to_pci_dev(dev);
4750         struct net_device *netdev = pci_get_drvdata(pdev);
4751         struct e1000_adapter *adapter = netdev_priv(netdev);
4752
4753         if (e1000e_pm_ready(adapter))
4754                 adapter->idle_check = true;
4755
4756         return __e1000_resume(pdev);
4757 }
4758 #endif /* CONFIG_PM_SLEEP */
4759
4760 #ifdef CONFIG_PM_RUNTIME
4761 static int e1000_runtime_suspend(struct device *dev)
4762 {
4763         struct pci_dev *pdev = to_pci_dev(dev);
4764         struct net_device *netdev = pci_get_drvdata(pdev);
4765         struct e1000_adapter *adapter = netdev_priv(netdev);
4766
4767         if (e1000e_pm_ready(adapter)) {
4768                 bool wake;
4769
4770                 __e1000_shutdown(pdev, &wake, true);
4771         }
4772
4773         return 0;
4774 }
4775
4776 static int e1000_idle(struct device *dev)
4777 {
4778         struct pci_dev *pdev = to_pci_dev(dev);
4779         struct net_device *netdev = pci_get_drvdata(pdev);
4780         struct e1000_adapter *adapter = netdev_priv(netdev);
4781
4782         if (!e1000e_pm_ready(adapter))
4783                 return 0;
4784
4785         if (adapter->idle_check) {
4786                 adapter->idle_check = false;
4787                 if (!e1000e_has_link(adapter))
4788                         pm_schedule_suspend(dev, MSEC_PER_SEC);
4789         }
4790
4791         return -EBUSY;
4792 }
4793
4794 static int e1000_runtime_resume(struct device *dev)
4795 {
4796         struct pci_dev *pdev = to_pci_dev(dev);
4797         struct net_device *netdev = pci_get_drvdata(pdev);
4798         struct e1000_adapter *adapter = netdev_priv(netdev);
4799
4800         if (!e1000e_pm_ready(adapter))
4801                 return 0;
4802
4803         adapter->idle_check = !dev->power.runtime_auto;
4804         return __e1000_resume(pdev);
4805 }
4806 #endif /* CONFIG_PM_RUNTIME */
4807 #endif /* CONFIG_PM_OPS */
4808
4809 static void e1000_shutdown(struct pci_dev *pdev)
4810 {
4811         bool wake = false;
4812
4813         __e1000_shutdown(pdev, &wake, false);
4814
4815         if (system_state == SYSTEM_POWER_OFF)
4816                 e1000_complete_shutdown(pdev, false, wake);
4817 }
4818
4819 #ifdef CONFIG_NET_POLL_CONTROLLER
4820 /*
4821  * Polling 'interrupt' - used by things like netconsole to send skbs
4822  * without having to re-enable interrupts. It's not called while
4823  * the interrupt routine is executing.
4824  */
4825 static void e1000_netpoll(struct net_device *netdev)
4826 {
4827         struct e1000_adapter *adapter = netdev_priv(netdev);
4828
4829         disable_irq(adapter->pdev->irq);
4830         e1000_intr(adapter->pdev->irq, netdev);
4831
4832         enable_irq(adapter->pdev->irq);
4833 }
4834 #endif
4835
4836 /**
4837  * e1000_io_error_detected - called when PCI error is detected
4838  * @pdev: Pointer to PCI device
4839  * @state: The current pci connection state
4840  *
4841  * This function is called after a PCI bus error affecting
4842  * this device has been detected.
4843  */
4844 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
4845                                                 pci_channel_state_t state)
4846 {
4847         struct net_device *netdev = pci_get_drvdata(pdev);
4848         struct e1000_adapter *adapter = netdev_priv(netdev);
4849
4850         netif_device_detach(netdev);
4851
4852         if (state == pci_channel_io_perm_failure)
4853                 return PCI_ERS_RESULT_DISCONNECT;
4854
4855         if (netif_running(netdev))
4856                 e1000e_down(adapter);
4857         pci_disable_device(pdev);
4858
4859         /* Request a slot slot reset. */
4860         return PCI_ERS_RESULT_NEED_RESET;
4861 }
4862
4863 /**
4864  * e1000_io_slot_reset - called after the pci bus has been reset.
4865  * @pdev: Pointer to PCI device
4866  *
4867  * Restart the card from scratch, as if from a cold-boot. Implementation
4868  * resembles the first-half of the e1000_resume routine.
4869  */
4870 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
4871 {
4872         struct net_device *netdev = pci_get_drvdata(pdev);
4873         struct e1000_adapter *adapter = netdev_priv(netdev);
4874         struct e1000_hw *hw = &adapter->hw;
4875         int err;
4876         pci_ers_result_t result;
4877
4878         e1000e_disable_l1aspm(pdev);
4879         err = pci_enable_device_mem(pdev);
4880         if (err) {
4881                 dev_err(&pdev->dev,
4882                         "Cannot re-enable PCI device after reset.\n");
4883                 result = PCI_ERS_RESULT_DISCONNECT;
4884         } else {
4885                 pci_set_master(pdev);
4886                 pdev->state_saved = true;
4887                 pci_restore_state(pdev);
4888
4889                 pci_enable_wake(pdev, PCI_D3hot, 0);
4890                 pci_enable_wake(pdev, PCI_D3cold, 0);
4891
4892                 e1000e_reset(adapter);
4893                 ew32(WUS, ~0);
4894                 result = PCI_ERS_RESULT_RECOVERED;
4895         }
4896
4897         pci_cleanup_aer_uncorrect_error_status(pdev);
4898
4899         return result;
4900 }
4901
4902 /**
4903  * e1000_io_resume - called when traffic can start flowing again.
4904  * @pdev: Pointer to PCI device
4905  *
4906  * This callback is called when the error recovery driver tells us that
4907  * its OK to resume normal operation. Implementation resembles the
4908  * second-half of the e1000_resume routine.
4909  */
4910 static void e1000_io_resume(struct pci_dev *pdev)
4911 {
4912         struct net_device *netdev = pci_get_drvdata(pdev);
4913         struct e1000_adapter *adapter = netdev_priv(netdev);
4914
4915         e1000_init_manageability(adapter);
4916
4917         if (netif_running(netdev)) {
4918                 if (e1000e_up(adapter)) {
4919                         dev_err(&pdev->dev,
4920                                 "can't bring device back up after reset\n");
4921                         return;
4922                 }
4923         }
4924
4925         netif_device_attach(netdev);
4926
4927         /*
4928          * If the controller has AMT, do not set DRV_LOAD until the interface
4929          * is up.  For all other cases, let the f/w know that the h/w is now
4930          * under the control of the driver.
4931          */
4932         if (!(adapter->flags & FLAG_HAS_AMT))
4933                 e1000_get_hw_control(adapter);
4934
4935 }
4936
4937 static void e1000_print_device_info(struct e1000_adapter *adapter)
4938 {
4939         struct e1000_hw *hw = &adapter->hw;
4940         struct net_device *netdev = adapter->netdev;
4941         u32 pba_num;
4942
4943         /* print bus type/speed/width info */
4944         e_info("(PCI Express:2.5GB/s:%s) %pM\n",
4945                /* bus width */
4946                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
4947                 "Width x1"),
4948                /* MAC address */
4949                netdev->dev_addr);
4950         e_info("Intel(R) PRO/%s Network Connection\n",
4951                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
4952         e1000e_read_pba_num(hw, &pba_num);
4953         e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
4954                hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
4955 }
4956
4957 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
4958 {
4959         struct e1000_hw *hw = &adapter->hw;
4960         int ret_val;
4961         u16 buf = 0;
4962
4963         if (hw->mac.type != e1000_82573)
4964                 return;
4965
4966         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
4967         if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
4968                 /* Deep Smart Power Down (DSPD) */
4969                 dev_warn(&adapter->pdev->dev,
4970                          "Warning: detected DSPD enabled in EEPROM\n");
4971         }
4972
4973         ret_val = e1000_read_nvm(hw, NVM_INIT_3GIO_3, 1, &buf);
4974         if (!ret_val && (le16_to_cpu(buf) & (3 << 2))) {
4975                 /* ASPM enable */
4976                 dev_warn(&adapter->pdev->dev,
4977                          "Warning: detected ASPM enabled in EEPROM\n");
4978         }
4979 }
4980
4981 static const struct net_device_ops e1000e_netdev_ops = {
4982         .ndo_open               = e1000_open,
4983         .ndo_stop               = e1000_close,
4984         .ndo_start_xmit         = e1000_xmit_frame,
4985         .ndo_get_stats          = e1000_get_stats,
4986         .ndo_set_multicast_list = e1000_set_multi,
4987         .ndo_set_mac_address    = e1000_set_mac,
4988         .ndo_change_mtu         = e1000_change_mtu,
4989         .ndo_do_ioctl           = e1000_ioctl,
4990         .ndo_tx_timeout         = e1000_tx_timeout,
4991         .ndo_validate_addr      = eth_validate_addr,
4992
4993         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
4994         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
4995         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
4996 #ifdef CONFIG_NET_POLL_CONTROLLER
4997         .ndo_poll_controller    = e1000_netpoll,
4998 #endif
4999 };
5000
5001 /**
5002  * e1000_probe - Device Initialization Routine
5003  * @pdev: PCI device information struct
5004  * @ent: entry in e1000_pci_tbl
5005  *
5006  * Returns 0 on success, negative on failure
5007  *
5008  * e1000_probe initializes an adapter identified by a pci_dev structure.
5009  * The OS initialization, configuring of the adapter private structure,
5010  * and a hardware reset occur.
5011  **/
5012 static int __devinit e1000_probe(struct pci_dev *pdev,
5013                                  const struct pci_device_id *ent)
5014 {
5015         struct net_device *netdev;
5016         struct e1000_adapter *adapter;
5017         struct e1000_hw *hw;
5018         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
5019         resource_size_t mmio_start, mmio_len;
5020         resource_size_t flash_start, flash_len;
5021
5022         static int cards_found;
5023         int i, err, pci_using_dac;
5024         u16 eeprom_data = 0;
5025         u16 eeprom_apme_mask = E1000_EEPROM_APME;
5026
5027         e1000e_disable_l1aspm(pdev);
5028
5029         err = pci_enable_device_mem(pdev);
5030         if (err)
5031                 return err;
5032
5033         pci_using_dac = 0;
5034         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64));
5035         if (!err) {
5036                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64));
5037                 if (!err)
5038                         pci_using_dac = 1;
5039         } else {
5040                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
5041                 if (err) {
5042                         err = pci_set_consistent_dma_mask(pdev,
5043                                                           DMA_BIT_MASK(32));
5044                         if (err) {
5045                                 dev_err(&pdev->dev, "No usable DMA "
5046                                         "configuration, aborting\n");
5047                                 goto err_dma;
5048                         }
5049                 }
5050         }
5051
5052         err = pci_request_selected_regions_exclusive(pdev,
5053                                           pci_select_bars(pdev, IORESOURCE_MEM),
5054                                           e1000e_driver_name);
5055         if (err)
5056                 goto err_pci_reg;
5057
5058         /* AER (Advanced Error Reporting) hooks */
5059         pci_enable_pcie_error_reporting(pdev);
5060
5061         pci_set_master(pdev);
5062         /* PCI config space info */
5063         err = pci_save_state(pdev);
5064         if (err)
5065                 goto err_alloc_etherdev;
5066
5067         err = -ENOMEM;
5068         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
5069         if (!netdev)
5070                 goto err_alloc_etherdev;
5071
5072         SET_NETDEV_DEV(netdev, &pdev->dev);
5073
5074         pci_set_drvdata(pdev, netdev);
5075         adapter = netdev_priv(netdev);
5076         hw = &adapter->hw;
5077         adapter->netdev = netdev;
5078         adapter->pdev = pdev;
5079         adapter->ei = ei;
5080         adapter->pba = ei->pba;
5081         adapter->flags = ei->flags;
5082         adapter->flags2 = ei->flags2;
5083         adapter->hw.adapter = adapter;
5084         adapter->hw.mac.type = ei->mac;
5085         adapter->max_hw_frame_size = ei->max_hw_frame_size;
5086         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
5087
5088         mmio_start = pci_resource_start(pdev, 0);
5089         mmio_len = pci_resource_len(pdev, 0);
5090
5091         err = -EIO;
5092         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
5093         if (!adapter->hw.hw_addr)
5094                 goto err_ioremap;
5095
5096         if ((adapter->flags & FLAG_HAS_FLASH) &&
5097             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
5098                 flash_start = pci_resource_start(pdev, 1);
5099                 flash_len = pci_resource_len(pdev, 1);
5100                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
5101                 if (!adapter->hw.flash_address)
5102                         goto err_flashmap;
5103         }
5104
5105         /* construct the net_device struct */
5106         netdev->netdev_ops              = &e1000e_netdev_ops;
5107         e1000e_set_ethtool_ops(netdev);
5108         netdev->watchdog_timeo          = 5 * HZ;
5109         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
5110         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
5111
5112         netdev->mem_start = mmio_start;
5113         netdev->mem_end = mmio_start + mmio_len;
5114
5115         adapter->bd_number = cards_found++;
5116
5117         e1000e_check_options(adapter);
5118
5119         /* setup adapter struct */
5120         err = e1000_sw_init(adapter);
5121         if (err)
5122                 goto err_sw_init;
5123
5124         err = -EIO;
5125
5126         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
5127         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
5128         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
5129
5130         err = ei->get_variants(adapter);
5131         if (err)
5132                 goto err_hw_init;
5133
5134         if ((adapter->flags & FLAG_IS_ICH) &&
5135             (adapter->flags & FLAG_READ_ONLY_NVM))
5136                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
5137
5138         hw->mac.ops.get_bus_info(&adapter->hw);
5139
5140         adapter->hw.phy.autoneg_wait_to_complete = 0;
5141
5142         /* Copper options */
5143         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
5144                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
5145                 adapter->hw.phy.disable_polarity_correction = 0;
5146                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
5147         }
5148
5149         if (e1000_check_reset_block(&adapter->hw))
5150                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5151
5152         netdev->features = NETIF_F_SG |
5153                            NETIF_F_HW_CSUM |
5154                            NETIF_F_HW_VLAN_TX |
5155                            NETIF_F_HW_VLAN_RX;
5156
5157         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
5158                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
5159
5160         netdev->features |= NETIF_F_TSO;
5161         netdev->features |= NETIF_F_TSO6;
5162
5163         netdev->vlan_features |= NETIF_F_TSO;
5164         netdev->vlan_features |= NETIF_F_TSO6;
5165         netdev->vlan_features |= NETIF_F_HW_CSUM;
5166         netdev->vlan_features |= NETIF_F_SG;
5167
5168         if (pci_using_dac)
5169                 netdev->features |= NETIF_F_HIGHDMA;
5170
5171         if (e1000e_enable_mng_pass_thru(&adapter->hw))
5172                 adapter->flags |= FLAG_MNG_PT_ENABLED;
5173
5174         /*
5175          * before reading the NVM, reset the controller to
5176          * put the device in a known good starting state
5177          */
5178         adapter->hw.mac.ops.reset_hw(&adapter->hw);
5179
5180         /*
5181          * systems with ASPM and others may see the checksum fail on the first
5182          * attempt. Let's give it a few tries
5183          */
5184         for (i = 0;; i++) {
5185                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
5186                         break;
5187                 if (i == 2) {
5188                         e_err("The NVM Checksum Is Not Valid\n");
5189                         err = -EIO;
5190                         goto err_eeprom;
5191                 }
5192         }
5193
5194         e1000_eeprom_checks(adapter);
5195
5196         /* copy the MAC address */
5197         if (e1000e_read_mac_addr(&adapter->hw))
5198                 e_err("NVM Read Error while reading MAC address\n");
5199
5200         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
5201         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
5202
5203         if (!is_valid_ether_addr(netdev->perm_addr)) {
5204                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
5205                 err = -EIO;
5206                 goto err_eeprom;
5207         }
5208
5209         init_timer(&adapter->watchdog_timer);
5210         adapter->watchdog_timer.function = &e1000_watchdog;
5211         adapter->watchdog_timer.data = (unsigned long) adapter;
5212
5213         init_timer(&adapter->phy_info_timer);
5214         adapter->phy_info_timer.function = &e1000_update_phy_info;
5215         adapter->phy_info_timer.data = (unsigned long) adapter;
5216
5217         INIT_WORK(&adapter->reset_task, e1000_reset_task);
5218         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
5219         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
5220         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
5221         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
5222
5223         /* Initialize link parameters. User can change them with ethtool */
5224         adapter->hw.mac.autoneg = 1;
5225         adapter->fc_autoneg = 1;
5226         adapter->hw.fc.requested_mode = e1000_fc_default;
5227         adapter->hw.fc.current_mode = e1000_fc_default;
5228         adapter->hw.phy.autoneg_advertised = 0x2f;
5229
5230         /* ring size defaults */
5231         adapter->rx_ring->count = 256;
5232         adapter->tx_ring->count = 256;
5233
5234         /*
5235          * Initial Wake on LAN setting - If APM wake is enabled in
5236          * the EEPROM, enable the ACPI Magic Packet filter
5237          */
5238         if (adapter->flags & FLAG_APME_IN_WUC) {
5239                 /* APME bit in EEPROM is mapped to WUC.APME */
5240                 eeprom_data = er32(WUC);
5241                 eeprom_apme_mask = E1000_WUC_APME;
5242                 if (eeprom_data & E1000_WUC_PHY_WAKE)
5243                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
5244         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
5245                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
5246                     (adapter->hw.bus.func == 1))
5247                         e1000_read_nvm(&adapter->hw,
5248                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
5249                 else
5250                         e1000_read_nvm(&adapter->hw,
5251                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
5252         }
5253
5254         /* fetch WoL from EEPROM */
5255         if (eeprom_data & eeprom_apme_mask)
5256                 adapter->eeprom_wol |= E1000_WUFC_MAG;
5257
5258         /*
5259          * now that we have the eeprom settings, apply the special cases
5260          * where the eeprom may be wrong or the board simply won't support
5261          * wake on lan on a particular port
5262          */
5263         if (!(adapter->flags & FLAG_HAS_WOL))
5264                 adapter->eeprom_wol = 0;
5265
5266         /* initialize the wol settings based on the eeprom settings */
5267         adapter->wol = adapter->eeprom_wol;
5268         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5269
5270         /* save off EEPROM version number */
5271         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
5272
5273         /* reset the hardware with the new settings */
5274         e1000e_reset(adapter);
5275
5276         /*
5277          * If the controller has AMT, do not set DRV_LOAD until the interface
5278          * is up.  For all other cases, let the f/w know that the h/w is now
5279          * under the control of the driver.
5280          */
5281         if (!(adapter->flags & FLAG_HAS_AMT))
5282                 e1000_get_hw_control(adapter);
5283
5284         strcpy(netdev->name, "eth%d");
5285         err = register_netdev(netdev);
5286         if (err)
5287                 goto err_register;
5288
5289         /* carrier off reporting is important to ethtool even BEFORE open */
5290         netif_carrier_off(netdev);
5291
5292         e1000_print_device_info(adapter);
5293
5294         if (pci_dev_run_wake(pdev)) {
5295                 pm_runtime_set_active(&pdev->dev);
5296                 pm_runtime_enable(&pdev->dev);
5297         }
5298         pm_schedule_suspend(&pdev->dev, MSEC_PER_SEC);
5299
5300         return 0;
5301
5302 err_register:
5303         if (!(adapter->flags & FLAG_HAS_AMT))
5304                 e1000_release_hw_control(adapter);
5305 err_eeprom:
5306         if (!e1000_check_reset_block(&adapter->hw))
5307                 e1000_phy_hw_reset(&adapter->hw);
5308 err_hw_init:
5309
5310         kfree(adapter->tx_ring);
5311         kfree(adapter->rx_ring);
5312 err_sw_init:
5313         if (adapter->hw.flash_address)
5314                 iounmap(adapter->hw.flash_address);
5315         e1000e_reset_interrupt_capability(adapter);
5316 err_flashmap:
5317         iounmap(adapter->hw.hw_addr);
5318 err_ioremap:
5319         free_netdev(netdev);
5320 err_alloc_etherdev:
5321         pci_release_selected_regions(pdev,
5322                                      pci_select_bars(pdev, IORESOURCE_MEM));
5323 err_pci_reg:
5324 err_dma:
5325         pci_disable_device(pdev);
5326         return err;
5327 }
5328
5329 /**
5330  * e1000_remove - Device Removal Routine
5331  * @pdev: PCI device information struct
5332  *
5333  * e1000_remove is called by the PCI subsystem to alert the driver
5334  * that it should release a PCI device.  The could be caused by a
5335  * Hot-Plug event, or because the driver is going to be removed from
5336  * memory.
5337  **/
5338 static void __devexit e1000_remove(struct pci_dev *pdev)
5339 {
5340         struct net_device *netdev = pci_get_drvdata(pdev);
5341         struct e1000_adapter *adapter = netdev_priv(netdev);
5342         bool down = test_bit(__E1000_DOWN, &adapter->state);
5343
5344         pm_runtime_get_sync(&pdev->dev);
5345
5346         /*
5347          * flush_scheduled work may reschedule our watchdog task, so
5348          * explicitly disable watchdog tasks from being rescheduled
5349          */
5350         if (!down)
5351                 set_bit(__E1000_DOWN, &adapter->state);
5352         del_timer_sync(&adapter->watchdog_timer);
5353         del_timer_sync(&adapter->phy_info_timer);
5354
5355         cancel_work_sync(&adapter->reset_task);
5356         cancel_work_sync(&adapter->watchdog_task);
5357         cancel_work_sync(&adapter->downshift_task);
5358         cancel_work_sync(&adapter->update_phy_task);
5359         cancel_work_sync(&adapter->print_hang_task);
5360         flush_scheduled_work();
5361
5362         if (!(netdev->flags & IFF_UP))
5363                 e1000_power_down_phy(adapter);
5364
5365         /* Don't lie to e1000_close() down the road. */
5366         if (!down)
5367                 clear_bit(__E1000_DOWN, &adapter->state);
5368         unregister_netdev(netdev);
5369
5370         if (pci_dev_run_wake(pdev)) {
5371                 pm_runtime_disable(&pdev->dev);
5372                 pm_runtime_set_suspended(&pdev->dev);
5373         }
5374         pm_runtime_put_noidle(&pdev->dev);
5375
5376         /*
5377          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5378          * would have already happened in close and is redundant.
5379          */
5380         e1000_release_hw_control(adapter);
5381
5382         e1000e_reset_interrupt_capability(adapter);
5383         kfree(adapter->tx_ring);
5384         kfree(adapter->rx_ring);
5385
5386         iounmap(adapter->hw.hw_addr);
5387         if (adapter->hw.flash_address)
5388                 iounmap(adapter->hw.flash_address);
5389         pci_release_selected_regions(pdev,
5390                                      pci_select_bars(pdev, IORESOURCE_MEM));
5391
5392         free_netdev(netdev);
5393
5394         /* AER disable */
5395         pci_disable_pcie_error_reporting(pdev);
5396
5397         pci_disable_device(pdev);
5398 }
5399
5400 /* PCI Error Recovery (ERS) */
5401 static struct pci_error_handlers e1000_err_handler = {
5402         .error_detected = e1000_io_error_detected,
5403         .slot_reset = e1000_io_slot_reset,
5404         .resume = e1000_io_resume,
5405 };
5406
5407 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
5408         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5409         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5410         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5411         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5412         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5413         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
5414         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5415         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5416         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
5417
5418         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5419         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5420         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5421         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
5422
5423         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5424         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5425         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
5426
5427         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
5428         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
5429         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
5430
5431         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5432           board_80003es2lan },
5433         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5434           board_80003es2lan },
5435         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5436           board_80003es2lan },
5437         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5438           board_80003es2lan },
5439
5440         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5441         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5442         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5443         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5444         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5445         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5446         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
5447         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
5448
5449         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5450         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5451         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5452         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5453         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
5454         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
5455         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5456         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5457         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5458
5459         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5460         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5461         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
5462
5463         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5464         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5465
5466         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
5467         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
5468         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
5469         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
5470
5471         { }     /* terminate list */
5472 };
5473 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5474
5475 #ifdef CONFIG_PM_OPS
5476 static const struct dev_pm_ops e1000_pm_ops = {
5477         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
5478         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
5479                                 e1000_runtime_resume, e1000_idle)
5480 };
5481 #endif
5482
5483 /* PCI Device API Driver */
5484 static struct pci_driver e1000_driver = {
5485         .name     = e1000e_driver_name,
5486         .id_table = e1000_pci_tbl,
5487         .probe    = e1000_probe,
5488         .remove   = __devexit_p(e1000_remove),
5489 #ifdef CONFIG_PM_OPS
5490         .driver.pm = &e1000_pm_ops,
5491 #endif
5492         .shutdown = e1000_shutdown,
5493         .err_handler = &e1000_err_handler
5494 };
5495
5496 /**
5497  * e1000_init_module - Driver Registration Routine
5498  *
5499  * e1000_init_module is the first routine called when the driver is
5500  * loaded. All it does is register with the PCI subsystem.
5501  **/
5502 static int __init e1000_init_module(void)
5503 {
5504         int ret;
5505         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
5506                 e1000e_driver_version);
5507         pr_info("Copyright (c) 1999 - 2009 Intel Corporation.\n");
5508         ret = pci_register_driver(&e1000_driver);
5509
5510         return ret;
5511 }
5512 module_init(e1000_init_module);
5513
5514 /**
5515  * e1000_exit_module - Driver Exit Cleanup Routine
5516  *
5517  * e1000_exit_module is called just before the driver is removed
5518  * from memory.
5519  **/
5520 static void __exit e1000_exit_module(void)
5521 {
5522         pci_unregister_driver(&e1000_driver);
5523 }
5524 module_exit(e1000_exit_module);
5525
5526
5527 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5528 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5529 MODULE_LICENSE("GPL");
5530 MODULE_VERSION(DRV_VERSION);
5531
5532 /* e1000_main.c */