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-k4"
  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 struct e1000_reg_info {
  73         u32 ofs;
  74         char *name;
  75 };
  76
  77 #define E1000_RDFH      0x02410 /* Rx Data FIFO Head - RW */
  78 #define E1000_RDFT      0x02418 /* Rx Data FIFO Tail - RW */
  79 #define E1000_RDFHS     0x02420 /* Rx Data FIFO Head Saved - RW */
  80 #define E1000_RDFTS     0x02428 /* Rx Data FIFO Tail Saved - RW */
  81 #define E1000_RDFPC     0x02430 /* Rx Data FIFO Packet Count - RW */
  82
  83 #define E1000_TDFH      0x03410 /* Tx Data FIFO Head - RW */
  84 #define E1000_TDFT      0x03418 /* Tx Data FIFO Tail - RW */
  85 #define E1000_TDFHS     0x03420 /* Tx Data FIFO Head Saved - RW */
  86 #define E1000_TDFTS     0x03428 /* Tx Data FIFO Tail Saved - RW */
  87 #define E1000_TDFPC     0x03430 /* Tx Data FIFO Packet Count - RW */
  88
  89 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
  90
  91         /* General Registers */
  92         {E1000_CTRL, "CTRL"},
  93         {E1000_STATUS, "STATUS"},
  94         {E1000_CTRL_EXT, "CTRL_EXT"},
  95
  96         /* Interrupt Registers */
  97         {E1000_ICR, "ICR"},
  98
  99         /* RX Registers */
 100         {E1000_RCTL, "RCTL"},
 101         {E1000_RDLEN, "RDLEN"},
 102         {E1000_RDH, "RDH"},
 103         {E1000_RDT, "RDT"},
 104         {E1000_RDTR, "RDTR"},
 105         {E1000_RXDCTL(0), "RXDCTL"},
 106         {E1000_ERT, "ERT"},
 107         {E1000_RDBAL, "RDBAL"},
 108         {E1000_RDBAH, "RDBAH"},
 109         {E1000_RDFH, "RDFH"},
 110         {E1000_RDFT, "RDFT"},
 111         {E1000_RDFHS, "RDFHS"},
 112         {E1000_RDFTS, "RDFTS"},
 113         {E1000_RDFPC, "RDFPC"},
 114
 115         /* TX Registers */
 116         {E1000_TCTL, "TCTL"},
 117         {E1000_TDBAL, "TDBAL"},
 118         {E1000_TDBAH, "TDBAH"},
 119         {E1000_TDLEN, "TDLEN"},
 120         {E1000_TDH, "TDH"},
 121         {E1000_TDT, "TDT"},
 122         {E1000_TIDV, "TIDV"},
 123         {E1000_TXDCTL(0), "TXDCTL"},
 124         {E1000_TADV, "TADV"},
 125         {E1000_TARC(0), "TARC"},
 126         {E1000_TDFH, "TDFH"},
 127         {E1000_TDFT, "TDFT"},
 128         {E1000_TDFHS, "TDFHS"},
 129         {E1000_TDFTS, "TDFTS"},
 130         {E1000_TDFPC, "TDFPC"},
 131
 132         /* List Terminator */
 133         {}
 134 };
 135
 136 /*
 137  * e1000_regdump - register printout routine
 138  */
 139 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
 140 {
 141         int n = 0;
 142         char rname[16];
 143         u32 regs[8];
 144
 145         switch (reginfo->ofs) {
 146         case E1000_RXDCTL(0):
 147                 for (n = 0; n < 2; n++)
 148                         regs[n] = __er32(hw, E1000_RXDCTL(n));
 149                 break;
 150         case E1000_TXDCTL(0):
 151                 for (n = 0; n < 2; n++)
 152                         regs[n] = __er32(hw, E1000_TXDCTL(n));
 153                 break;
 154         case E1000_TARC(0):
 155                 for (n = 0; n < 2; n++)
 156                         regs[n] = __er32(hw, E1000_TARC(n));
 157                 break;
 158         default:
 159                 printk(KERN_INFO "%-15s %08x\n",
 160                         reginfo->name, __er32(hw, reginfo->ofs));
 161                 return;
 162         }
 163
 164         snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
 165         printk(KERN_INFO "%-15s ", rname);
 166         for (n = 0; n < 2; n++)
 167                 printk(KERN_CONT "%08x ", regs[n]);
 168         printk(KERN_CONT "\n");
 169 }
 170
 171
 172 /*
 173  * e1000e_dump - Print registers, tx-ring and rx-ring
 174  */
 175 static void e1000e_dump(struct e1000_adapter *adapter)
 176 {
 177         struct net_device *netdev = adapter->netdev;
 178         struct e1000_hw *hw = &adapter->hw;
 179         struct e1000_reg_info *reginfo;
 180         struct e1000_ring *tx_ring = adapter->tx_ring;
 181         struct e1000_tx_desc *tx_desc;
 182         struct my_u0 { u64 a; u64 b; } *u0;
 183         struct e1000_buffer *buffer_info;
 184         struct e1000_ring *rx_ring = adapter->rx_ring;
 185         union e1000_rx_desc_packet_split *rx_desc_ps;
 186         struct e1000_rx_desc *rx_desc;
 187         struct my_u1 { u64 a; u64 b; u64 c; u64 d; } *u1;
 188         u32 staterr;
 189         int i = 0;
 190
 191         if (!netif_msg_hw(adapter))
 192                 return;
 193
 194         /* Print netdevice Info */
 195         if (netdev) {
 196                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 197                 printk(KERN_INFO "Device Name     state            "
 198                         "trans_start      last_rx\n");
 199                 printk(KERN_INFO "%-15s %016lX %016lX %016lX\n",
 200                         netdev->name,
 201                         netdev->state,
 202                         netdev->trans_start,
 203                         netdev->last_rx);
 204         }
 205
 206         /* Print Registers */
 207         dev_info(&adapter->pdev->dev, "Register Dump\n");
 208         printk(KERN_INFO " Register Name   Value\n");
 209         for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
 210              reginfo->name; reginfo++) {
 211                 e1000_regdump(hw, reginfo);
 212         }
 213
 214         /* Print TX Ring Summary */
 215         if (!netdev || !netif_running(netdev))
 216                 goto exit;
 217
 218         dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
 219         printk(KERN_INFO "Queue [NTU] [NTC] [bi(ntc)->dma  ]"
 220                 " leng ntw timestamp\n");
 221         buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
 222         printk(KERN_INFO " %5d %5X %5X %016llX %04X %3X %016llX\n",
 223                 0, tx_ring->next_to_use, tx_ring->next_to_clean,
 224                 (u64)buffer_info->dma,
 225                 buffer_info->length,
 226                 buffer_info->next_to_watch,
 227                 (u64)buffer_info->time_stamp);
 228
 229         /* Print TX Rings */
 230         if (!netif_msg_tx_done(adapter))
 231                 goto rx_ring_summary;
 232
 233         dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
 234
 235         /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
 236          *
 237          * Legacy Transmit Descriptor
 238          *   +--------------------------------------------------------------+
 239          * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |
 240          *   +--------------------------------------------------------------+
 241          * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |
 242          *   +--------------------------------------------------------------+
 243          *   63       48 47        36 35    32 31     24 23    16 15        0
 244          *
 245          * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
 246          *   63      48 47    40 39       32 31             16 15    8 7      0
 247          *   +----------------------------------------------------------------+
 248          * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |
 249          *   +----------------------------------------------------------------+
 250          * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |
 251          *   +----------------------------------------------------------------+
 252          *   63      48 47    40 39 36 35 32 31   24 23  20 19                0
 253          *
 254          * Extended Data Descriptor (DTYP=0x1)
 255          *   +----------------------------------------------------------------+
 256          * 0 |                     Buffer Address [63:0]                      |
 257          *   +----------------------------------------------------------------+
 258          * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |
 259          *   +----------------------------------------------------------------+
 260          *   63       48 47     40 39  36 35    32 31     24 23  20 19        0
 261          */
 262         printk(KERN_INFO "Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen]"
 263                 " [bi->dma       ] leng  ntw timestamp        bi->skb "
 264                 "<-- Legacy format\n");
 265         printk(KERN_INFO "Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen]"
 266                 " [bi->dma       ] leng  ntw timestamp        bi->skb "
 267                 "<-- Ext Context format\n");
 268         printk(KERN_INFO "Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen]"
 269                 " [bi->dma       ] leng  ntw timestamp        bi->skb "
 270                 "<-- Ext Data format\n");
 271         for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 272                 tx_desc = E1000_TX_DESC(*tx_ring, i);
 273                 buffer_info = &tx_ring->buffer_info[i];
 274                 u0 = (struct my_u0 *)tx_desc;
 275                 printk(KERN_INFO "T%c[0x%03X]    %016llX %016llX %016llX "
 276                         "%04X  %3X %016llX %p",
 277                        (!(le64_to_cpu(u0->b) & (1<<29)) ? 'l' :
 278                         ((le64_to_cpu(u0->b) & (1<<20)) ? 'd' : 'c')), i,
 279                        le64_to_cpu(u0->a), le64_to_cpu(u0->b),
 280                        (u64)buffer_info->dma, buffer_info->length,
 281                        buffer_info->next_to_watch, (u64)buffer_info->time_stamp,
 282                        buffer_info->skb);
 283                 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
 284                         printk(KERN_CONT " NTC/U\n");
 285                 else if (i == tx_ring->next_to_use)
 286                         printk(KERN_CONT " NTU\n");
 287                 else if (i == tx_ring->next_to_clean)
 288                         printk(KERN_CONT " NTC\n");
 289                 else
 290                         printk(KERN_CONT "\n");
 291
 292                 if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
 293                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 294                                         16, 1, phys_to_virt(buffer_info->dma),
 295                                         buffer_info->length, true);
 296         }
 297
 298         /* Print RX Rings Summary */
 299 rx_ring_summary:
 300         dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
 301         printk(KERN_INFO "Queue [NTU] [NTC]\n");
 302         printk(KERN_INFO " %5d %5X %5X\n", 0,
 303                 rx_ring->next_to_use, rx_ring->next_to_clean);
 304
 305         /* Print RX Rings */
 306         if (!netif_msg_rx_status(adapter))
 307                 goto exit;
 308
 309         dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
 310         switch (adapter->rx_ps_pages) {
 311         case 1:
 312         case 2:
 313         case 3:
 314                 /* [Extended] Packet Split Receive Descriptor Format
 315                  *
 316                  *    +-----------------------------------------------------+
 317                  *  0 |                Buffer Address 0 [63:0]              |
 318                  *    +-----------------------------------------------------+
 319                  *  8 |                Buffer Address 1 [63:0]              |
 320                  *    +-----------------------------------------------------+
 321                  * 16 |                Buffer Address 2 [63:0]              |
 322                  *    +-----------------------------------------------------+
 323                  * 24 |                Buffer Address 3 [63:0]              |
 324                  *    +-----------------------------------------------------+
 325                  */
 326                 printk(KERN_INFO "R  [desc]      [buffer 0 63:0 ] "
 327                         "[buffer 1 63:0 ] "
 328                        "[buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma       ] "
 329                        "[bi->skb] <-- Ext Pkt Split format\n");
 330                 /* [Extended] Receive Descriptor (Write-Back) Format
 331                  *
 332                  *   63       48 47    32 31     13 12    8 7    4 3        0
 333                  *   +------------------------------------------------------+
 334                  * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |
 335                  *   | Checksum | Ident  |         | Queue |      |  Type   |
 336                  *   +------------------------------------------------------+
 337                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 338                  *   +------------------------------------------------------+
 339                  *   63       48 47    32 31            20 19               0
 340                  */
 341                 printk(KERN_INFO "RWB[desc]      [ck ipid mrqhsh] "
 342                         "[vl   l0 ee  es] "
 343                        "[ l3  l2  l1 hs] [reserved      ] ---------------- "
 344                        "[bi->skb] <-- Ext Rx Write-Back format\n");
 345                 for (i = 0; i < rx_ring->count; i++) {
 346                         buffer_info = &rx_ring->buffer_info[i];
 347                         rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
 348                         u1 = (struct my_u1 *)rx_desc_ps;
 349                         staterr =
 350                                 le32_to_cpu(rx_desc_ps->wb.middle.status_error);
 351                         if (staterr & E1000_RXD_STAT_DD) {
 352                                 /* Descriptor Done */
 353                                 printk(KERN_INFO "RWB[0x%03X]     %016llX "
 354                                         "%016llX %016llX %016llX "
 355                                         "---------------- %p", i,
 356                                         le64_to_cpu(u1->a),
 357                                         le64_to_cpu(u1->b),
 358                                         le64_to_cpu(u1->c),
 359                                         le64_to_cpu(u1->d),
 360                                         buffer_info->skb);
 361                         } else {
 362                                 printk(KERN_INFO "R  [0x%03X]     %016llX "
 363                                         "%016llX %016llX %016llX %016llX %p", i,
 364                                         le64_to_cpu(u1->a),
 365                                         le64_to_cpu(u1->b),
 366                                         le64_to_cpu(u1->c),
 367                                         le64_to_cpu(u1->d),
 368                                         (u64)buffer_info->dma,
 369                                         buffer_info->skb);
 370
 371                                 if (netif_msg_pktdata(adapter))
 372                                         print_hex_dump(KERN_INFO, "",
 373                                                 DUMP_PREFIX_ADDRESS, 16, 1,
 374                                                 phys_to_virt(buffer_info->dma),
 375                                                 adapter->rx_ps_bsize0, true);
 376                         }
 377
 378                         if (i == rx_ring->next_to_use)
 379                                 printk(KERN_CONT " NTU\n");
 380                         else if (i == rx_ring->next_to_clean)
 381                                 printk(KERN_CONT " NTC\n");
 382                         else
 383                                 printk(KERN_CONT "\n");
 384                 }
 385                 break;
 386         default:
 387         case 0:
 388                 /* Legacy Receive Descriptor Format
 389                  *
 390                  * +-----------------------------------------------------+
 391                  * |                Buffer Address [63:0]                |
 392                  * +-----------------------------------------------------+
 393                  * | VLAN Tag | Errors | Status 0 | Packet csum | Length |
 394                  * +-----------------------------------------------------+
 395                  * 63       48 47    40 39      32 31         16 15      0
 396                  */
 397                 printk(KERN_INFO "Rl[desc]     [address 63:0  ] "
 398                         "[vl er S cks ln] [bi->dma       ] [bi->skb] "
 399                         "<-- Legacy format\n");
 400                 for (i = 0; rx_ring->desc && (i < rx_ring->count); i++) {
 401                         rx_desc = E1000_RX_DESC(*rx_ring, i);
 402                         buffer_info = &rx_ring->buffer_info[i];
 403                         u0 = (struct my_u0 *)rx_desc;
 404                         printk(KERN_INFO "Rl[0x%03X]    %016llX %016llX "
 405                                 "%016llX %p",
 406                                 i, le64_to_cpu(u0->a), le64_to_cpu(u0->b),
 407                                 (u64)buffer_info->dma, buffer_info->skb);
 408                         if (i == rx_ring->next_to_use)
 409                                 printk(KERN_CONT " NTU\n");
 410                         else if (i == rx_ring->next_to_clean)
 411                                 printk(KERN_CONT " NTC\n");
 412                         else
 413                                 printk(KERN_CONT "\n");
 414
 415                         if (netif_msg_pktdata(adapter))
 416                                 print_hex_dump(KERN_INFO, "",
 417                                         DUMP_PREFIX_ADDRESS,
 418                                         16, 1, phys_to_virt(buffer_info->dma),
 419                                         adapter->rx_buffer_len, true);
 420                 }
 421         }
 422
 423 exit:
 424         return;
 425 }
 426
 427 /**
 428  * e1000_desc_unused - calculate if we have unused descriptors
 429  **/
 430 static int e1000_desc_unused(struct e1000_ring *ring)
 431 {
 432         if (ring->next_to_clean > ring->next_to_use)
 433                 return ring->next_to_clean - ring->next_to_use - 1;
 434
 435         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 436 }
 437
 438 /**
 439  * e1000_receive_skb - helper function to handle Rx indications
 440  * @adapter: board private structure
 441  * @status: descriptor status field as written by hardware
 442  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 443  * @skb: pointer to sk_buff to be indicated to stack
 444  **/
 445 static void e1000_receive_skb(struct e1000_adapter *adapter,
 446                               struct net_device *netdev,
 447                               struct sk_buff *skb,
 448                               u8 status, __le16 vlan)
 449 {
 450         skb->protocol = eth_type_trans(skb, netdev);
 451
 452         if (adapter->vlgrp && (status & E1000_RXD_STAT_VP))
 453                 vlan_gro_receive(&adapter->napi, adapter->vlgrp,
 454                                  le16_to_cpu(vlan), skb);
 455         else
 456                 napi_gro_receive(&adapter->napi, skb);
 457 }
 458
 459 /**
 460  * e1000_rx_checksum - Receive Checksum Offload for 82543
 461  * @adapter:     board private structure
 462  * @status_err:  receive descriptor status and error fields
 463  * @csum:       receive descriptor csum field
 464  * @sk_buff:     socket buffer with received data
 465  **/
 466 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 467                               u32 csum, struct sk_buff *skb)
 468 {
 469         u16 status = (u16)status_err;
 470         u8 errors = (u8)(status_err >> 24);
 471         skb->ip_summed = CHECKSUM_NONE;
 472
 473         /* Ignore Checksum bit is set */
 474         if (status & E1000_RXD_STAT_IXSM)
 475                 return;
 476         /* TCP/UDP checksum error bit is set */
 477         if (errors & E1000_RXD_ERR_TCPE) {
 478                 /* let the stack verify checksum errors */
 479                 adapter->hw_csum_err++;
 480                 return;
 481         }
 482
 483         /* TCP/UDP Checksum has not been calculated */
 484         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 485                 return;
 486
 487         /* It must be a TCP or UDP packet with a valid checksum */
 488         if (status & E1000_RXD_STAT_TCPCS) {
 489                 /* TCP checksum is good */
 490                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 491         } else {
 492                 /*
 493                  * IP fragment with UDP payload
 494                  * Hardware complements the payload checksum, so we undo it
 495                  * and then put the value in host order for further stack use.
 496                  */
 497                 __sum16 sum = (__force __sum16)htons(csum);
 498                 skb->csum = csum_unfold(~sum);
 499                 skb->ip_summed = CHECKSUM_COMPLETE;
 500         }
 501         adapter->hw_csum_good++;
 502 }
 503
 504 /**
 505  * e1000_alloc_rx_buffers - Replace used receive buffers; legacy & extended
 506  * @adapter: address of board private structure
 507  **/
 508 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 509                                    int cleaned_count)
 510 {
 511         struct net_device *netdev = adapter->netdev;
 512         struct pci_dev *pdev = adapter->pdev;
 513         struct e1000_ring *rx_ring = adapter->rx_ring;
 514         struct e1000_rx_desc *rx_desc;
 515         struct e1000_buffer *buffer_info;
 516         struct sk_buff *skb;
 517         unsigned int i;
 518         unsigned int bufsz = adapter->rx_buffer_len;
 519
 520         i = rx_ring->next_to_use;
 521         buffer_info = &rx_ring->buffer_info[i];
 522
 523         while (cleaned_count--) {
 524                 skb = buffer_info->skb;
 525                 if (skb) {
 526                         skb_trim(skb, 0);
 527                         goto map_skb;
 528                 }
 529
 530                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 531                 if (!skb) {
 532                         /* Better luck next round */
 533                         adapter->alloc_rx_buff_failed++;
 534                         break;
 535                 }
 536
 537                 buffer_info->skb = skb;
 538 map_skb:
 539                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 540                                                   adapter->rx_buffer_len,
 541                                                   DMA_FROM_DEVICE);
 542                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 543                         dev_err(&pdev->dev, "RX DMA map failed\n");
 544                         adapter->rx_dma_failed++;
 545                         break;
 546                 }
 547
 548                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 549                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 550
 551                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 552                         /*
 553                          * Force memory writes to complete before letting h/w
 554                          * know there are new descriptors to fetch.  (Only
 555                          * applicable for weak-ordered memory model archs,
 556                          * such as IA-64).
 557                          */
 558                         wmb();
 559                         writel(i, adapter->hw.hw_addr + rx_ring->tail);
 560                 }
 561                 i++;
 562                 if (i == rx_ring->count)
 563                         i = 0;
 564                 buffer_info = &rx_ring->buffer_info[i];
 565         }
 566
 567         rx_ring->next_to_use = i;
 568 }
 569
 570 /**
 571  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 572  * @adapter: address of board private structure
 573  **/
 574 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 575                                       int cleaned_count)
 576 {
 577         struct net_device *netdev = adapter->netdev;
 578         struct pci_dev *pdev = adapter->pdev;
 579         union e1000_rx_desc_packet_split *rx_desc;
 580         struct e1000_ring *rx_ring = adapter->rx_ring;
 581         struct e1000_buffer *buffer_info;
 582         struct e1000_ps_page *ps_page;
 583         struct sk_buff *skb;
 584         unsigned int i, j;
 585
 586         i = rx_ring->next_to_use;
 587         buffer_info = &rx_ring->buffer_info[i];
 588
 589         while (cleaned_count--) {
 590                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 591
 592                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 593                         ps_page = &buffer_info->ps_pages[j];
 594                         if (j >= adapter->rx_ps_pages) {
 595                                 /* all unused desc entries get hw null ptr */
 596                                 rx_desc->read.buffer_addr[j+1] = ~cpu_to_le64(0);
 597                                 continue;
 598                         }
 599                         if (!ps_page->page) {
 600                                 ps_page->page = alloc_page(GFP_ATOMIC);
 601                                 if (!ps_page->page) {
 602                                         adapter->alloc_rx_buff_failed++;
 603                                         goto no_buffers;
 604                                 }
 605                                 ps_page->dma = dma_map_page(&pdev->dev,
 606                                                             ps_page->page,
 607                                                             0, PAGE_SIZE,
 608                                                             DMA_FROM_DEVICE);
 609                                 if (dma_mapping_error(&pdev->dev,
 610                                                       ps_page->dma)) {
 611                                         dev_err(&adapter->pdev->dev,
 612                                           "RX DMA page map failed\n");
 613                                         adapter->rx_dma_failed++;
 614                                         goto no_buffers;
 615                                 }
 616                         }
 617                         /*
 618                          * Refresh the desc even if buffer_addrs
 619                          * didn't change because each write-back
 620                          * erases this info.
 621                          */
 622                         rx_desc->read.buffer_addr[j+1] =
 623                              cpu_to_le64(ps_page->dma);
 624                 }
 625
 626                 skb = netdev_alloc_skb_ip_align(netdev,
 627                                                 adapter->rx_ps_bsize0);
 628
 629                 if (!skb) {
 630                         adapter->alloc_rx_buff_failed++;
 631                         break;
 632                 }
 633
 634                 buffer_info->skb = skb;
 635                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 636                                                   adapter->rx_ps_bsize0,
 637                                                   DMA_FROM_DEVICE);
 638                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 639                         dev_err(&pdev->dev, "RX DMA map failed\n");
 640                         adapter->rx_dma_failed++;
 641                         /* cleanup skb */
 642                         dev_kfree_skb_any(skb);
 643                         buffer_info->skb = NULL;
 644                         break;
 645                 }
 646
 647                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 648
 649                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 650                         /*
 651                          * Force memory writes to complete before letting h/w
 652                          * know there are new descriptors to fetch.  (Only
 653                          * applicable for weak-ordered memory model archs,
 654                          * such as IA-64).
 655                          */
 656                         wmb();
 657                         writel(i<<1, adapter->hw.hw_addr + rx_ring->tail);
 658                 }
 659
 660                 i++;
 661                 if (i == rx_ring->count)
 662                         i = 0;
 663                 buffer_info = &rx_ring->buffer_info[i];
 664         }
 665
 666 no_buffers:
 667         rx_ring->next_to_use = i;
 668 }
 669
 670 /**
 671  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 672  * @adapter: address of board private structure
 673  * @cleaned_count: number of buffers to allocate this pass
 674  **/
 675
 676 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 677                                          int cleaned_count)
 678 {
 679         struct net_device *netdev = adapter->netdev;
 680         struct pci_dev *pdev = adapter->pdev;
 681         struct e1000_rx_desc *rx_desc;
 682         struct e1000_ring *rx_ring = adapter->rx_ring;
 683         struct e1000_buffer *buffer_info;
 684         struct sk_buff *skb;
 685         unsigned int i;
 686         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 687
 688         i = rx_ring->next_to_use;
 689         buffer_info = &rx_ring->buffer_info[i];
 690
 691         while (cleaned_count--) {
 692                 skb = buffer_info->skb;
 693                 if (skb) {
 694                         skb_trim(skb, 0);
 695                         goto check_page;
 696                 }
 697
 698                 skb = netdev_alloc_skb_ip_align(netdev, bufsz);
 699                 if (unlikely(!skb)) {
 700                         /* Better luck next round */
 701                         adapter->alloc_rx_buff_failed++;
 702                         break;
 703                 }
 704
 705                 buffer_info->skb = skb;
 706 check_page:
 707                 /* allocate a new page if necessary */
 708                 if (!buffer_info->page) {
 709                         buffer_info->page = alloc_page(GFP_ATOMIC);
 710                         if (unlikely(!buffer_info->page)) {
 711                                 adapter->alloc_rx_buff_failed++;
 712                                 break;
 713                         }
 714                 }
 715
 716                 if (!buffer_info->dma)
 717                         buffer_info->dma = dma_map_page(&pdev->dev,
 718                                                         buffer_info->page, 0,
 719                                                         PAGE_SIZE,
 720                                                         DMA_FROM_DEVICE);
 721
 722                 rx_desc = E1000_RX_DESC(*rx_ring, i);
 723                 rx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
 724
 725                 if (unlikely(++i == rx_ring->count))
 726                         i = 0;
 727                 buffer_info = &rx_ring->buffer_info[i];
 728         }
 729
 730         if (likely(rx_ring->next_to_use != i)) {
 731                 rx_ring->next_to_use = i;
 732                 if (unlikely(i-- == 0))
 733                         i = (rx_ring->count - 1);
 734
 735                 /* Force memory writes to complete before letting h/w
 736                  * know there are new descriptors to fetch.  (Only
 737                  * applicable for weak-ordered memory model archs,
 738                  * such as IA-64). */
 739                 wmb();
 740                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 741         }
 742 }
 743
 744 /**
 745  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 746  * @adapter: board private structure
 747  *
 748  * the return value indicates whether actual cleaning was done, there
 749  * is no guarantee that everything was cleaned
 750  **/
 751 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 752                                int *work_done, int work_to_do)
 753 {
 754         struct net_device *netdev = adapter->netdev;
 755         struct pci_dev *pdev = adapter->pdev;
 756         struct e1000_hw *hw = &adapter->hw;
 757         struct e1000_ring *rx_ring = adapter->rx_ring;
 758         struct e1000_rx_desc *rx_desc, *next_rxd;
 759         struct e1000_buffer *buffer_info, *next_buffer;
 760         u32 length;
 761         unsigned int i;
 762         int cleaned_count = 0;
 763         bool cleaned = 0;
 764         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 765
 766         i = rx_ring->next_to_clean;
 767         rx_desc = E1000_RX_DESC(*rx_ring, i);
 768         buffer_info = &rx_ring->buffer_info[i];
 769
 770         while (rx_desc->status & E1000_RXD_STAT_DD) {
 771                 struct sk_buff *skb;
 772                 u8 status;
 773
 774                 if (*work_done >= work_to_do)
 775                         break;
 776                 (*work_done)++;
 777
 778                 status = rx_desc->status;
 779                 skb = buffer_info->skb;
 780                 buffer_info->skb = NULL;
 781
 782                 prefetch(skb->data - NET_IP_ALIGN);
 783
 784                 i++;
 785                 if (i == rx_ring->count)
 786                         i = 0;
 787                 next_rxd = E1000_RX_DESC(*rx_ring, i);
 788                 prefetch(next_rxd);
 789
 790                 next_buffer = &rx_ring->buffer_info[i];
 791
 792                 cleaned = 1;
 793                 cleaned_count++;
 794                 dma_unmap_single(&pdev->dev,
 795                                  buffer_info->dma,
 796                                  adapter->rx_buffer_len,
 797                                  DMA_FROM_DEVICE);
 798                 buffer_info->dma = 0;
 799
 800                 length = le16_to_cpu(rx_desc->length);
 801
 802                 /*
 803                  * !EOP means multiple descriptors were used to store a single
 804                  * packet, if that's the case we need to toss it.  In fact, we
 805                  * need to toss every packet with the EOP bit clear and the
 806                  * next frame that _does_ have the EOP bit set, as it is by
 807                  * definition only a frame fragment
 808                  */
 809                 if (unlikely(!(status & E1000_RXD_STAT_EOP)))
 810                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 811
 812                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 813                         /* All receives must fit into a single buffer */
 814                         e_dbg("Receive packet consumed multiple buffers\n");
 815                         /* recycle */
 816                         buffer_info->skb = skb;
 817                         if (status & E1000_RXD_STAT_EOP)
 818                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 819                         goto next_desc;
 820                 }
 821
 822                 if (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK) {
 823                         /* recycle */
 824                         buffer_info->skb = skb;
 825                         goto next_desc;
 826                 }
 827
 828                 /* adjust length to remove Ethernet CRC */
 829                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 830                         length -= 4;
 831
 832                 total_rx_bytes += length;
 833                 total_rx_packets++;
 834
 835                 /*
 836                  * code added for copybreak, this should improve
 837                  * performance for small packets with large amounts
 838                  * of reassembly being done in the stack
 839                  */
 840                 if (length < copybreak) {
 841                         struct sk_buff *new_skb =
 842                             netdev_alloc_skb_ip_align(netdev, length);
 843                         if (new_skb) {
 844                                 skb_copy_to_linear_data_offset(new_skb,
 845                                                                -NET_IP_ALIGN,
 846                                                                (skb->data -
 847                                                                 NET_IP_ALIGN),
 848                                                                (length +
 849                                                                 NET_IP_ALIGN));
 850                                 /* save the skb in buffer_info as good */
 851                                 buffer_info->skb = skb;
 852                                 skb = new_skb;
 853                         }
 854                         /* else just continue with the old one */
 855                 }
 856                 /* end copybreak code */
 857                 skb_put(skb, length);
 858
 859                 /* Receive Checksum Offload */
 860                 e1000_rx_checksum(adapter,
 861                                   (u32)(status) |
 862                                   ((u32)(rx_desc->errors) << 24),
 863                                   le16_to_cpu(rx_desc->csum), skb);
 864
 865                 e1000_receive_skb(adapter, netdev, skb,status,rx_desc->special);
 866
 867 next_desc:
 868                 rx_desc->status = 0;
 869
 870                 /* return some buffers to hardware, one at a time is too slow */
 871                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 872                         adapter->alloc_rx_buf(adapter, cleaned_count);
 873                         cleaned_count = 0;
 874                 }
 875
 876                 /* use prefetched values */
 877                 rx_desc = next_rxd;
 878                 buffer_info = next_buffer;
 879         }
 880         rx_ring->next_to_clean = i;
 881
 882         cleaned_count = e1000_desc_unused(rx_ring);
 883         if (cleaned_count)
 884                 adapter->alloc_rx_buf(adapter, cleaned_count);
 885
 886         adapter->total_rx_bytes += total_rx_bytes;
 887         adapter->total_rx_packets += total_rx_packets;
 888         netdev->stats.rx_bytes += total_rx_bytes;
 889         netdev->stats.rx_packets += total_rx_packets;
 890         return cleaned;
 891 }
 892
 893 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 894                              struct e1000_buffer *buffer_info)
 895 {
 896         if (buffer_info->dma) {
 897                 if (buffer_info->mapped_as_page)
 898                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
 899                                        buffer_info->length, DMA_TO_DEVICE);
 900                 else
 901                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
 902                                          buffer_info->length, DMA_TO_DEVICE);
 903                 buffer_info->dma = 0;
 904         }
 905         if (buffer_info->skb) {
 906                 dev_kfree_skb_any(buffer_info->skb);
 907                 buffer_info->skb = NULL;
 908         }
 909         buffer_info->time_stamp = 0;
 910 }
 911
 912 static void e1000_print_hw_hang(struct work_struct *work)
 913 {
 914         struct e1000_adapter *adapter = container_of(work,
 915                                                      struct e1000_adapter,
 916                                                      print_hang_task);
 917         struct e1000_ring *tx_ring = adapter->tx_ring;
 918         unsigned int i = tx_ring->next_to_clean;
 919         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
 920         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
 921         struct e1000_hw *hw = &adapter->hw;
 922         u16 phy_status, phy_1000t_status, phy_ext_status;
 923         u16 pci_status;
 924
 925         e1e_rphy(hw, PHY_STATUS, &phy_status);
 926         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
 927         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
 928
 929         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
 930
 931         /* detected Hardware unit hang */
 932         e_err("Detected Hardware Unit Hang:\n"
 933               "  TDH                  <%x>\n"
 934               "  TDT                  <%x>\n"
 935               "  next_to_use          <%x>\n"
 936               "  next_to_clean        <%x>\n"
 937               "buffer_info[next_to_clean]:\n"
 938               "  time_stamp           <%lx>\n"
 939               "  next_to_watch        <%x>\n"
 940               "  jiffies              <%lx>\n"
 941               "  next_to_watch.status <%x>\n"
 942               "MAC Status             <%x>\n"
 943               "PHY Status             <%x>\n"
 944               "PHY 1000BASE-T Status  <%x>\n"
 945               "PHY Extended Status    <%x>\n"
 946               "PCI Status             <%x>\n",
 947               readl(adapter->hw.hw_addr + tx_ring->head),
 948               readl(adapter->hw.hw_addr + tx_ring->tail),
 949               tx_ring->next_to_use,
 950               tx_ring->next_to_clean,
 951               tx_ring->buffer_info[eop].time_stamp,
 952               eop,
 953               jiffies,
 954               eop_desc->upper.fields.status,
 955               er32(STATUS),
 956               phy_status,
 957               phy_1000t_status,
 958               phy_ext_status,
 959               pci_status);
 960 }
 961
 962 /**
 963  * e1000_clean_tx_irq - Reclaim resources after transmit completes
 964  * @adapter: board private structure
 965  *
 966  * the return value indicates whether actual cleaning was done, there
 967  * is no guarantee that everything was cleaned
 968  **/
 969 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
 970 {
 971         struct net_device *netdev = adapter->netdev;
 972         struct e1000_hw *hw = &adapter->hw;
 973         struct e1000_ring *tx_ring = adapter->tx_ring;
 974         struct e1000_tx_desc *tx_desc, *eop_desc;
 975         struct e1000_buffer *buffer_info;
 976         unsigned int i, eop;
 977         unsigned int count = 0;
 978         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 979
 980         i = tx_ring->next_to_clean;
 981         eop = tx_ring->buffer_info[i].next_to_watch;
 982         eop_desc = E1000_TX_DESC(*tx_ring, eop);
 983
 984         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
 985                (count < tx_ring->count)) {
 986                 bool cleaned = false;
 987                 for (; !cleaned; count++) {
 988                         tx_desc = E1000_TX_DESC(*tx_ring, i);
 989                         buffer_info = &tx_ring->buffer_info[i];
 990                         cleaned = (i == eop);
 991
 992                         if (cleaned) {
 993                                 total_tx_packets += buffer_info->segs;
 994                                 total_tx_bytes += buffer_info->bytecount;
 995                         }
 996
 997                         e1000_put_txbuf(adapter, buffer_info);
 998                         tx_desc->upper.data = 0;
 999
1000                         i++;
1001                         if (i == tx_ring->count)
1002                                 i = 0;
1003                 }
1004
1005                 if (i == tx_ring->next_to_use)
1006                         break;
1007                 eop = tx_ring->buffer_info[i].next_to_watch;
1008                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1009         }
1010
1011         tx_ring->next_to_clean = i;
1012
1013 #define TX_WAKE_THRESHOLD 32
1014         if (count && netif_carrier_ok(netdev) &&
1015             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1016                 /* Make sure that anybody stopping the queue after this
1017                  * sees the new next_to_clean.
1018                  */
1019                 smp_mb();
1020
1021                 if (netif_queue_stopped(netdev) &&
1022                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1023                         netif_wake_queue(netdev);
1024                         ++adapter->restart_queue;
1025                 }
1026         }
1027
1028         if (adapter->detect_tx_hung) {
1029                 /*
1030                  * Detect a transmit hang in hardware, this serializes the
1031                  * check with the clearing of time_stamp and movement of i
1032                  */
1033                 adapter->detect_tx_hung = 0;
1034                 if (tx_ring->buffer_info[i].time_stamp &&
1035                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1036                                + (adapter->tx_timeout_factor * HZ)) &&
1037                     !(er32(STATUS) & E1000_STATUS_TXOFF)) {
1038                         schedule_work(&adapter->print_hang_task);
1039                         netif_stop_queue(netdev);
1040                 }
1041         }
1042         adapter->total_tx_bytes += total_tx_bytes;
1043         adapter->total_tx_packets += total_tx_packets;
1044         netdev->stats.tx_bytes += total_tx_bytes;
1045         netdev->stats.tx_packets += total_tx_packets;
1046         return (count < tx_ring->count);
1047 }
1048
1049 /**
1050  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1051  * @adapter: board private structure
1052  *
1053  * the return value indicates whether actual cleaning was done, there
1054  * is no guarantee that everything was cleaned
1055  **/
1056 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
1057                                   int *work_done, int work_to_do)
1058 {
1059         struct e1000_hw *hw = &adapter->hw;
1060         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1061         struct net_device *netdev = adapter->netdev;
1062         struct pci_dev *pdev = adapter->pdev;
1063         struct e1000_ring *rx_ring = adapter->rx_ring;
1064         struct e1000_buffer *buffer_info, *next_buffer;
1065         struct e1000_ps_page *ps_page;
1066         struct sk_buff *skb;
1067         unsigned int i, j;
1068         u32 length, staterr;
1069         int cleaned_count = 0;
1070         bool cleaned = 0;
1071         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1072
1073         i = rx_ring->next_to_clean;
1074         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1075         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1076         buffer_info = &rx_ring->buffer_info[i];
1077
1078         while (staterr & E1000_RXD_STAT_DD) {
1079                 if (*work_done >= work_to_do)
1080                         break;
1081                 (*work_done)++;
1082                 skb = buffer_info->skb;
1083
1084                 /* in the packet split case this is header only */
1085                 prefetch(skb->data - NET_IP_ALIGN);
1086
1087                 i++;
1088                 if (i == rx_ring->count)
1089                         i = 0;
1090                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1091                 prefetch(next_rxd);
1092
1093                 next_buffer = &rx_ring->buffer_info[i];
1094
1095                 cleaned = 1;
1096                 cleaned_count++;
1097                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1098                                  adapter->rx_ps_bsize0,
1099                                  DMA_FROM_DEVICE);
1100                 buffer_info->dma = 0;
1101
1102                 /* see !EOP comment in other rx routine */
1103                 if (!(staterr & E1000_RXD_STAT_EOP))
1104                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1105
1106                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1107                         e_dbg("Packet Split buffers didn't pick up the full "
1108                               "packet\n");
1109                         dev_kfree_skb_irq(skb);
1110                         if (staterr & E1000_RXD_STAT_EOP)
1111                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1112                         goto next_desc;
1113                 }
1114
1115                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
1116                         dev_kfree_skb_irq(skb);
1117                         goto next_desc;
1118                 }
1119
1120                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1121
1122                 if (!length) {
1123                         e_dbg("Last part of the packet spanning multiple "
1124                               "descriptors\n");
1125                         dev_kfree_skb_irq(skb);
1126                         goto next_desc;
1127                 }
1128
1129                 /* Good Receive */
1130                 skb_put(skb, length);
1131
1132                 {
1133                 /*
1134                  * this looks ugly, but it seems compiler issues make it
1135                  * more efficient than reusing j
1136                  */
1137                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1138
1139                 /*
1140                  * page alloc/put takes too long and effects small packet
1141                  * throughput, so unsplit small packets and save the alloc/put
1142                  * only valid in softirq (napi) context to call kmap_*
1143                  */
1144                 if (l1 && (l1 <= copybreak) &&
1145                     ((length + l1) <= adapter->rx_ps_bsize0)) {
1146                         u8 *vaddr;
1147
1148                         ps_page = &buffer_info->ps_pages[0];
1149
1150                         /*
1151                          * there is no documentation about how to call
1152                          * kmap_atomic, so we can't hold the mapping
1153                          * very long
1154                          */
1155                         dma_sync_single_for_cpu(&pdev->dev, ps_page->dma,
1156                                                 PAGE_SIZE, DMA_FROM_DEVICE);
1157                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
1158                         memcpy(skb_tail_pointer(skb), vaddr, l1);
1159                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
1160                         dma_sync_single_for_device(&pdev->dev, ps_page->dma,
1161                                                    PAGE_SIZE, DMA_FROM_DEVICE);
1162
1163                         /* remove the CRC */
1164                         if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
1165                                 l1 -= 4;
1166
1167                         skb_put(skb, l1);
1168                         goto copydone;
1169                 } /* if */
1170                 }
1171
1172                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1173                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1174                         if (!length)
1175                                 break;
1176
1177                         ps_page = &buffer_info->ps_pages[j];
1178                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1179                                        DMA_FROM_DEVICE);
1180                         ps_page->dma = 0;
1181                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1182                         ps_page->page = NULL;
1183                         skb->len += length;
1184                         skb->data_len += length;
1185                         skb->truesize += length;
1186                 }
1187
1188                 /* strip the ethernet crc, problem is we're using pages now so
1189                  * this whole operation can get a little cpu intensive
1190                  */
1191                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
1192                         pskb_trim(skb, skb->len - 4);
1193
1194 copydone:
1195                 total_rx_bytes += skb->len;
1196                 total_rx_packets++;
1197
1198                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
1199                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
1200
1201                 if (rx_desc->wb.upper.header_status &
1202                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1203                         adapter->rx_hdr_split++;
1204
1205                 e1000_receive_skb(adapter, netdev, skb,
1206                                   staterr, rx_desc->wb.middle.vlan);
1207
1208 next_desc:
1209                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1210                 buffer_info->skb = NULL;
1211
1212                 /* return some buffers to hardware, one at a time is too slow */
1213                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1214                         adapter->alloc_rx_buf(adapter, cleaned_count);
1215                         cleaned_count = 0;
1216                 }
1217
1218                 /* use prefetched values */
1219                 rx_desc = next_rxd;
1220                 buffer_info = next_buffer;
1221
1222                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1223         }
1224         rx_ring->next_to_clean = i;
1225
1226         cleaned_count = e1000_desc_unused(rx_ring);
1227         if (cleaned_count)
1228                 adapter->alloc_rx_buf(adapter, cleaned_count);
1229
1230         adapter->total_rx_bytes += total_rx_bytes;
1231         adapter->total_rx_packets += total_rx_packets;
1232         netdev->stats.rx_bytes += total_rx_bytes;
1233         netdev->stats.rx_packets += total_rx_packets;
1234         return cleaned;
1235 }
1236
1237 /**
1238  * e1000_consume_page - helper function
1239  **/
1240 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1241                                u16 length)
1242 {
1243         bi->page = NULL;
1244         skb->len += length;
1245         skb->data_len += length;
1246         skb->truesize += length;
1247 }
1248
1249 /**
1250  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1251  * @adapter: board private structure
1252  *
1253  * the return value indicates whether actual cleaning was done, there
1254  * is no guarantee that everything was cleaned
1255  **/
1256
1257 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
1258                                      int *work_done, int work_to_do)
1259 {
1260         struct net_device *netdev = adapter->netdev;
1261         struct pci_dev *pdev = adapter->pdev;
1262         struct e1000_ring *rx_ring = adapter->rx_ring;
1263         struct e1000_rx_desc *rx_desc, *next_rxd;
1264         struct e1000_buffer *buffer_info, *next_buffer;
1265         u32 length;
1266         unsigned int i;
1267         int cleaned_count = 0;
1268         bool cleaned = false;
1269         unsigned int total_rx_bytes=0, total_rx_packets=0;
1270
1271         i = rx_ring->next_to_clean;
1272         rx_desc = E1000_RX_DESC(*rx_ring, i);
1273         buffer_info = &rx_ring->buffer_info[i];
1274
1275         while (rx_desc->status & E1000_RXD_STAT_DD) {
1276                 struct sk_buff *skb;
1277                 u8 status;
1278
1279                 if (*work_done >= work_to_do)
1280                         break;
1281                 (*work_done)++;
1282
1283                 status = rx_desc->status;
1284                 skb = buffer_info->skb;
1285                 buffer_info->skb = NULL;
1286
1287                 ++i;
1288                 if (i == rx_ring->count)
1289                         i = 0;
1290                 next_rxd = E1000_RX_DESC(*rx_ring, i);
1291                 prefetch(next_rxd);
1292
1293                 next_buffer = &rx_ring->buffer_info[i];
1294
1295                 cleaned = true;
1296                 cleaned_count++;
1297                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1298                                DMA_FROM_DEVICE);
1299                 buffer_info->dma = 0;
1300
1301                 length = le16_to_cpu(rx_desc->length);
1302
1303                 /* errors is only valid for DD + EOP descriptors */
1304                 if (unlikely((status & E1000_RXD_STAT_EOP) &&
1305                     (rx_desc->errors & E1000_RXD_ERR_FRAME_ERR_MASK))) {
1306                                 /* recycle both page and skb */
1307                                 buffer_info->skb = skb;
1308                                 /* an error means any chain goes out the window
1309                                  * too */
1310                                 if (rx_ring->rx_skb_top)
1311                                         dev_kfree_skb(rx_ring->rx_skb_top);
1312                                 rx_ring->rx_skb_top = NULL;
1313                                 goto next_desc;
1314                 }
1315
1316 #define rxtop rx_ring->rx_skb_top
1317                 if (!(status & E1000_RXD_STAT_EOP)) {
1318                         /* this descriptor is only the beginning (or middle) */
1319                         if (!rxtop) {
1320                                 /* this is the beginning of a chain */
1321                                 rxtop = skb;
1322                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1323                                                    0, length);
1324                         } else {
1325                                 /* this is the middle of a chain */
1326                                 skb_fill_page_desc(rxtop,
1327                                     skb_shinfo(rxtop)->nr_frags,
1328                                     buffer_info->page, 0, length);
1329                                 /* re-use the skb, only consumed the page */
1330                                 buffer_info->skb = skb;
1331                         }
1332                         e1000_consume_page(buffer_info, rxtop, length);
1333                         goto next_desc;
1334                 } else {
1335                         if (rxtop) {
1336                                 /* end of the chain */
1337                                 skb_fill_page_desc(rxtop,
1338                                     skb_shinfo(rxtop)->nr_frags,
1339                                     buffer_info->page, 0, length);
1340                                 /* re-use the current skb, we only consumed the
1341                                  * page */
1342                                 buffer_info->skb = skb;
1343                                 skb = rxtop;
1344                                 rxtop = NULL;
1345                                 e1000_consume_page(buffer_info, skb, length);
1346                         } else {
1347                                 /* no chain, got EOP, this buf is the packet
1348                                  * copybreak to save the put_page/alloc_page */
1349                                 if (length <= copybreak &&
1350                                     skb_tailroom(skb) >= length) {
1351                                         u8 *vaddr;
1352                                         vaddr = kmap_atomic(buffer_info->page,
1353                                                            KM_SKB_DATA_SOFTIRQ);
1354                                         memcpy(skb_tail_pointer(skb), vaddr,
1355                                                length);
1356                                         kunmap_atomic(vaddr,
1357                                                       KM_SKB_DATA_SOFTIRQ);
1358                                         /* re-use the page, so don't erase
1359                                          * buffer_info->page */
1360                                         skb_put(skb, length);
1361                                 } else {
1362                                         skb_fill_page_desc(skb, 0,
1363                                                            buffer_info->page, 0,
1364                                                            length);
1365                                         e1000_consume_page(buffer_info, skb,
1366                                                            length);
1367                                 }
1368                         }
1369                 }
1370
1371                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1372                 e1000_rx_checksum(adapter,
1373                                   (u32)(status) |
1374                                   ((u32)(rx_desc->errors) << 24),
1375                                   le16_to_cpu(rx_desc->csum), skb);
1376
1377                 /* probably a little skewed due to removing CRC */
1378                 total_rx_bytes += skb->len;
1379                 total_rx_packets++;
1380
1381                 /* eth type trans needs skb->data to point to something */
1382                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1383                         e_err("pskb_may_pull failed.\n");
1384                         dev_kfree_skb(skb);
1385                         goto next_desc;
1386                 }
1387
1388                 e1000_receive_skb(adapter, netdev, skb, status,
1389                                   rx_desc->special);
1390
1391 next_desc:
1392                 rx_desc->status = 0;
1393
1394                 /* return some buffers to hardware, one at a time is too slow */
1395                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1396                         adapter->alloc_rx_buf(adapter, cleaned_count);
1397                         cleaned_count = 0;
1398                 }
1399
1400                 /* use prefetched values */
1401                 rx_desc = next_rxd;
1402                 buffer_info = next_buffer;
1403         }
1404         rx_ring->next_to_clean = i;
1405
1406         cleaned_count = e1000_desc_unused(rx_ring);
1407         if (cleaned_count)
1408                 adapter->alloc_rx_buf(adapter, cleaned_count);
1409
1410         adapter->total_rx_bytes += total_rx_bytes;
1411         adapter->total_rx_packets += total_rx_packets;
1412         netdev->stats.rx_bytes += total_rx_bytes;
1413         netdev->stats.rx_packets += total_rx_packets;
1414         return cleaned;
1415 }
1416
1417 /**
1418  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1419  * @adapter: board private structure
1420  **/
1421 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1422 {
1423         struct e1000_ring *rx_ring = adapter->rx_ring;
1424         struct e1000_buffer *buffer_info;
1425         struct e1000_ps_page *ps_page;
1426         struct pci_dev *pdev = adapter->pdev;
1427         unsigned int i, j;
1428
1429         /* Free all the Rx ring sk_buffs */
1430         for (i = 0; i < rx_ring->count; i++) {
1431                 buffer_info = &rx_ring->buffer_info[i];
1432                 if (buffer_info->dma) {
1433                         if (adapter->clean_rx == e1000_clean_rx_irq)
1434                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1435                                                  adapter->rx_buffer_len,
1436                                                  DMA_FROM_DEVICE);
1437                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1438                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1439                                                PAGE_SIZE,
1440                                                DMA_FROM_DEVICE);
1441                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1442                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1443                                                  adapter->rx_ps_bsize0,
1444                                                  DMA_FROM_DEVICE);
1445                         buffer_info->dma = 0;
1446                 }
1447
1448                 if (buffer_info->page) {
1449                         put_page(buffer_info->page);
1450                         buffer_info->page = NULL;
1451                 }
1452
1453                 if (buffer_info->skb) {
1454                         dev_kfree_skb(buffer_info->skb);
1455                         buffer_info->skb = NULL;
1456                 }
1457
1458                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1459                         ps_page = &buffer_info->ps_pages[j];
1460                         if (!ps_page->page)
1461                                 break;
1462                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1463                                        DMA_FROM_DEVICE);
1464                         ps_page->dma = 0;
1465                         put_page(ps_page->page);
1466                         ps_page->page = NULL;
1467                 }
1468         }
1469
1470         /* there also may be some cached data from a chained receive */
1471         if (rx_ring->rx_skb_top) {
1472                 dev_kfree_skb(rx_ring->rx_skb_top);
1473                 rx_ring->rx_skb_top = NULL;
1474         }
1475
1476         /* Zero out the descriptor ring */
1477         memset(rx_ring->desc, 0, rx_ring->size);
1478
1479         rx_ring->next_to_clean = 0;
1480         rx_ring->next_to_use = 0;
1481         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1482
1483         writel(0, adapter->hw.hw_addr + rx_ring->head);
1484         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1485 }
1486
1487 static void e1000e_downshift_workaround(struct work_struct *work)
1488 {
1489         struct e1000_adapter *adapter = container_of(work,
1490                                         struct e1000_adapter, downshift_task);
1491
1492         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1493 }
1494
1495 /**
1496  * e1000_intr_msi - Interrupt Handler
1497  * @irq: interrupt number
1498  * @data: pointer to a network interface device structure
1499  **/
1500 static irqreturn_t e1000_intr_msi(int irq, void *data)
1501 {
1502         struct net_device *netdev = data;
1503         struct e1000_adapter *adapter = netdev_priv(netdev);
1504         struct e1000_hw *hw = &adapter->hw;
1505         u32 icr = er32(ICR);
1506
1507         /*
1508          * read ICR disables interrupts using IAM
1509          */
1510
1511         if (icr & E1000_ICR_LSC) {
1512                 hw->mac.get_link_status = 1;
1513                 /*
1514                  * ICH8 workaround-- Call gig speed drop workaround on cable
1515                  * disconnect (LSC) before accessing any PHY registers
1516                  */
1517                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1518                     (!(er32(STATUS) & E1000_STATUS_LU)))
1519                         schedule_work(&adapter->downshift_task);
1520
1521                 /*
1522                  * 80003ES2LAN workaround-- For packet buffer work-around on
1523                  * link down event; disable receives here in the ISR and reset
1524                  * adapter in watchdog
1525                  */
1526                 if (netif_carrier_ok(netdev) &&
1527                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1528                         /* disable receives */
1529                         u32 rctl = er32(RCTL);
1530                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1531                         adapter->flags |= FLAG_RX_RESTART_NOW;
1532                 }
1533                 /* guard against interrupt when we're going down */
1534                 if (!test_bit(__E1000_DOWN, &adapter->state))
1535                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1536         }
1537
1538         if (napi_schedule_prep(&adapter->napi)) {
1539                 adapter->total_tx_bytes = 0;
1540                 adapter->total_tx_packets = 0;
1541                 adapter->total_rx_bytes = 0;
1542                 adapter->total_rx_packets = 0;
1543                 __napi_schedule(&adapter->napi);
1544         }
1545
1546         return IRQ_HANDLED;
1547 }
1548
1549 /**
1550  * e1000_intr - Interrupt Handler
1551  * @irq: interrupt number
1552  * @data: pointer to a network interface device structure
1553  **/
1554 static irqreturn_t e1000_intr(int irq, void *data)
1555 {
1556         struct net_device *netdev = data;
1557         struct e1000_adapter *adapter = netdev_priv(netdev);
1558         struct e1000_hw *hw = &adapter->hw;
1559         u32 rctl, icr = er32(ICR);
1560
1561         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1562                 return IRQ_NONE;  /* Not our interrupt */
1563
1564         /*
1565          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1566          * not set, then the adapter didn't send an interrupt
1567          */
1568         if (!(icr & E1000_ICR_INT_ASSERTED))
1569                 return IRQ_NONE;
1570
1571         /*
1572          * Interrupt Auto-Mask...upon reading ICR,
1573          * interrupts are masked.  No need for the
1574          * IMC write
1575          */
1576
1577         if (icr & E1000_ICR_LSC) {
1578                 hw->mac.get_link_status = 1;
1579                 /*
1580                  * ICH8 workaround-- Call gig speed drop workaround on cable
1581                  * disconnect (LSC) before accessing any PHY registers
1582                  */
1583                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1584                     (!(er32(STATUS) & E1000_STATUS_LU)))
1585                         schedule_work(&adapter->downshift_task);
1586
1587                 /*
1588                  * 80003ES2LAN workaround--
1589                  * For packet buffer work-around on link down event;
1590                  * disable receives here in the ISR and
1591                  * reset adapter in watchdog
1592                  */
1593                 if (netif_carrier_ok(netdev) &&
1594                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1595                         /* disable receives */
1596                         rctl = er32(RCTL);
1597                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1598                         adapter->flags |= FLAG_RX_RESTART_NOW;
1599                 }
1600                 /* guard against interrupt when we're going down */
1601                 if (!test_bit(__E1000_DOWN, &adapter->state))
1602                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1603         }
1604
1605         if (napi_schedule_prep(&adapter->napi)) {
1606                 adapter->total_tx_bytes = 0;
1607                 adapter->total_tx_packets = 0;
1608                 adapter->total_rx_bytes = 0;
1609                 adapter->total_rx_packets = 0;
1610                 __napi_schedule(&adapter->napi);
1611         }
1612
1613         return IRQ_HANDLED;
1614 }
1615
1616 static irqreturn_t e1000_msix_other(int irq, void *data)
1617 {
1618         struct net_device *netdev = data;
1619         struct e1000_adapter *adapter = netdev_priv(netdev);
1620         struct e1000_hw *hw = &adapter->hw;
1621         u32 icr = er32(ICR);
1622
1623         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1624                 if (!test_bit(__E1000_DOWN, &adapter->state))
1625                         ew32(IMS, E1000_IMS_OTHER);
1626                 return IRQ_NONE;
1627         }
1628
1629         if (icr & adapter->eiac_mask)
1630                 ew32(ICS, (icr & adapter->eiac_mask));
1631
1632         if (icr & E1000_ICR_OTHER) {
1633                 if (!(icr & E1000_ICR_LSC))
1634                         goto no_link_interrupt;
1635                 hw->mac.get_link_status = 1;
1636                 /* guard against interrupt when we're going down */
1637                 if (!test_bit(__E1000_DOWN, &adapter->state))
1638                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1639         }
1640
1641 no_link_interrupt:
1642         if (!test_bit(__E1000_DOWN, &adapter->state))
1643                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1644
1645         return IRQ_HANDLED;
1646 }
1647
1648
1649 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1650 {
1651         struct net_device *netdev = data;
1652         struct e1000_adapter *adapter = netdev_priv(netdev);
1653         struct e1000_hw *hw = &adapter->hw;
1654         struct e1000_ring *tx_ring = adapter->tx_ring;
1655
1656
1657         adapter->total_tx_bytes = 0;
1658         adapter->total_tx_packets = 0;
1659
1660         if (!e1000_clean_tx_irq(adapter))
1661                 /* Ring was not completely cleaned, so fire another interrupt */
1662                 ew32(ICS, tx_ring->ims_val);
1663
1664         return IRQ_HANDLED;
1665 }
1666
1667 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1668 {
1669         struct net_device *netdev = data;
1670         struct e1000_adapter *adapter = netdev_priv(netdev);
1671
1672         /* Write the ITR value calculated at the end of the
1673          * previous interrupt.
1674          */
1675         if (adapter->rx_ring->set_itr) {
1676                 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1677                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1678                 adapter->rx_ring->set_itr = 0;
1679         }
1680
1681         if (napi_schedule_prep(&adapter->napi)) {
1682                 adapter->total_rx_bytes = 0;
1683                 adapter->total_rx_packets = 0;
1684                 __napi_schedule(&adapter->napi);
1685         }
1686         return IRQ_HANDLED;
1687 }
1688
1689 /**
1690  * e1000_configure_msix - Configure MSI-X hardware
1691  *
1692  * e1000_configure_msix sets up the hardware to properly
1693  * generate MSI-X interrupts.
1694  **/
1695 static void e1000_configure_msix(struct e1000_adapter *adapter)
1696 {
1697         struct e1000_hw *hw = &adapter->hw;
1698         struct e1000_ring *rx_ring = adapter->rx_ring;
1699         struct e1000_ring *tx_ring = adapter->tx_ring;
1700         int vector = 0;
1701         u32 ctrl_ext, ivar = 0;
1702
1703         adapter->eiac_mask = 0;
1704
1705         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1706         if (hw->mac.type == e1000_82574) {
1707                 u32 rfctl = er32(RFCTL);
1708                 rfctl |= E1000_RFCTL_ACK_DIS;
1709                 ew32(RFCTL, rfctl);
1710         }
1711
1712 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1713         /* Configure Rx vector */
1714         rx_ring->ims_val = E1000_IMS_RXQ0;
1715         adapter->eiac_mask |= rx_ring->ims_val;
1716         if (rx_ring->itr_val)
1717                 writel(1000000000 / (rx_ring->itr_val * 256),
1718                        hw->hw_addr + rx_ring->itr_register);
1719         else
1720                 writel(1, hw->hw_addr + rx_ring->itr_register);
1721         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1722
1723         /* Configure Tx vector */
1724         tx_ring->ims_val = E1000_IMS_TXQ0;
1725         vector++;
1726         if (tx_ring->itr_val)
1727                 writel(1000000000 / (tx_ring->itr_val * 256),
1728                        hw->hw_addr + tx_ring->itr_register);
1729         else
1730                 writel(1, hw->hw_addr + tx_ring->itr_register);
1731         adapter->eiac_mask |= tx_ring->ims_val;
1732         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1733
1734         /* set vector for Other Causes, e.g. link changes */
1735         vector++;
1736         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1737         if (rx_ring->itr_val)
1738                 writel(1000000000 / (rx_ring->itr_val * 256),
1739                        hw->hw_addr + E1000_EITR_82574(vector));
1740         else
1741                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1742
1743         /* Cause Tx interrupts on every write back */
1744         ivar |= (1 << 31);
1745
1746         ew32(IVAR, ivar);
1747
1748         /* enable MSI-X PBA support */
1749         ctrl_ext = er32(CTRL_EXT);
1750         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1751
1752         /* Auto-Mask Other interrupts upon ICR read */
1753 #define E1000_EIAC_MASK_82574   0x01F00000
1754         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1755         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1756         ew32(CTRL_EXT, ctrl_ext);
1757         e1e_flush();
1758 }
1759
1760 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1761 {
1762         if (adapter->msix_entries) {
1763                 pci_disable_msix(adapter->pdev);
1764                 kfree(adapter->msix_entries);
1765                 adapter->msix_entries = NULL;
1766         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1767                 pci_disable_msi(adapter->pdev);
1768                 adapter->flags &= ~FLAG_MSI_ENABLED;
1769         }
1770
1771         return;
1772 }
1773
1774 /**
1775  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1776  *
1777  * Attempt to configure interrupts using the best available
1778  * capabilities of the hardware and kernel.
1779  **/
1780 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1781 {
1782         int err;
1783         int numvecs, i;
1784
1785
1786         switch (adapter->int_mode) {
1787         case E1000E_INT_MODE_MSIX:
1788                 if (adapter->flags & FLAG_HAS_MSIX) {
1789                         numvecs = 3; /* RxQ0, TxQ0 and other */
1790                         adapter->msix_entries = kcalloc(numvecs,
1791                                                       sizeof(struct msix_entry),
1792                                                       GFP_KERNEL);
1793                         if (adapter->msix_entries) {
1794                                 for (i = 0; i < numvecs; i++)
1795                                         adapter->msix_entries[i].entry = i;
1796
1797                                 err = pci_enable_msix(adapter->pdev,
1798                                                       adapter->msix_entries,
1799                                                       numvecs);
1800                                 if (err == 0)
1801                                         return;
1802                         }
1803                         /* MSI-X failed, so fall through and try MSI */
1804                         e_err("Failed to initialize MSI-X interrupts.  "
1805                               "Falling back to MSI interrupts.\n");
1806                         e1000e_reset_interrupt_capability(adapter);
1807                 }
1808                 adapter->int_mode = E1000E_INT_MODE_MSI;
1809                 /* Fall through */
1810         case E1000E_INT_MODE_MSI:
1811                 if (!pci_enable_msi(adapter->pdev)) {
1812                         adapter->flags |= FLAG_MSI_ENABLED;
1813                 } else {
1814                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1815                         e_err("Failed to initialize MSI interrupts.  Falling "
1816                               "back to legacy interrupts.\n");
1817                 }
1818                 /* Fall through */
1819         case E1000E_INT_MODE_LEGACY:
1820                 /* Don't do anything; this is the system default */
1821                 break;
1822         }
1823
1824         return;
1825 }
1826
1827 /**
1828  * e1000_request_msix - Initialize MSI-X interrupts
1829  *
1830  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1831  * kernel.
1832  **/
1833 static int e1000_request_msix(struct e1000_adapter *adapter)
1834 {
1835         struct net_device *netdev = adapter->netdev;
1836         int err = 0, vector = 0;
1837
1838         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1839                 sprintf(adapter->rx_ring->name, "%s-rx-0", netdev->name);
1840         else
1841                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1842         err = request_irq(adapter->msix_entries[vector].vector,
1843                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1844                           netdev);
1845         if (err)
1846                 goto out;
1847         adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1848         adapter->rx_ring->itr_val = adapter->itr;
1849         vector++;
1850
1851         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1852                 sprintf(adapter->tx_ring->name, "%s-tx-0", netdev->name);
1853         else
1854                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1855         err = request_irq(adapter->msix_entries[vector].vector,
1856                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1857                           netdev);
1858         if (err)
1859                 goto out;
1860         adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1861         adapter->tx_ring->itr_val = adapter->itr;
1862         vector++;
1863
1864         err = request_irq(adapter->msix_entries[vector].vector,
1865                           e1000_msix_other, 0, netdev->name, netdev);
1866         if (err)
1867                 goto out;
1868
1869         e1000_configure_msix(adapter);
1870         return 0;
1871 out:
1872         return err;
1873 }
1874
1875 /**
1876  * e1000_request_irq - initialize interrupts
1877  *
1878  * Attempts to configure interrupts using the best available
1879  * capabilities of the hardware and kernel.
1880  **/
1881 static int e1000_request_irq(struct e1000_adapter *adapter)
1882 {
1883         struct net_device *netdev = adapter->netdev;
1884         int err;
1885
1886         if (adapter->msix_entries) {
1887                 err = e1000_request_msix(adapter);
1888                 if (!err)
1889                         return err;
1890                 /* fall back to MSI */
1891                 e1000e_reset_interrupt_capability(adapter);
1892                 adapter->int_mode = E1000E_INT_MODE_MSI;
1893                 e1000e_set_interrupt_capability(adapter);
1894         }
1895         if (adapter->flags & FLAG_MSI_ENABLED) {
1896                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
1897                                   netdev->name, netdev);
1898                 if (!err)
1899                         return err;
1900
1901                 /* fall back to legacy interrupt */
1902                 e1000e_reset_interrupt_capability(adapter);
1903                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
1904         }
1905
1906         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
1907                           netdev->name, netdev);
1908         if (err)
1909                 e_err("Unable to allocate interrupt, Error: %d\n", err);
1910
1911         return err;
1912 }
1913
1914 static void e1000_free_irq(struct e1000_adapter *adapter)
1915 {
1916         struct net_device *netdev = adapter->netdev;
1917
1918         if (adapter->msix_entries) {
1919                 int vector = 0;
1920
1921                 free_irq(adapter->msix_entries[vector].vector, netdev);
1922                 vector++;
1923
1924                 free_irq(adapter->msix_entries[vector].vector, netdev);
1925                 vector++;
1926
1927                 /* Other Causes interrupt vector */
1928                 free_irq(adapter->msix_entries[vector].vector, netdev);
1929                 return;
1930         }
1931
1932         free_irq(adapter->pdev->irq, netdev);
1933 }
1934
1935 /**
1936  * e1000_irq_disable - Mask off interrupt generation on the NIC
1937  **/
1938 static void e1000_irq_disable(struct e1000_adapter *adapter)
1939 {
1940         struct e1000_hw *hw = &adapter->hw;
1941
1942         ew32(IMC, ~0);
1943         if (adapter->msix_entries)
1944                 ew32(EIAC_82574, 0);
1945         e1e_flush();
1946         synchronize_irq(adapter->pdev->irq);
1947 }
1948
1949 /**
1950  * e1000_irq_enable - Enable default interrupt generation settings
1951  **/
1952 static void e1000_irq_enable(struct e1000_adapter *adapter)
1953 {
1954         struct e1000_hw *hw = &adapter->hw;
1955
1956         if (adapter->msix_entries) {
1957                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
1958                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
1959         } else {
1960                 ew32(IMS, IMS_ENABLE_MASK);
1961         }
1962         e1e_flush();
1963 }
1964
1965 /**
1966  * e1000_get_hw_control - get control of the h/w from f/w
1967  * @adapter: address of board private structure
1968  *
1969  * e1000_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1970  * For ASF and Pass Through versions of f/w this means that
1971  * the driver is loaded. For AMT version (only with 82573)
1972  * of the f/w this means that the network i/f is open.
1973  **/
1974 static void e1000_get_hw_control(struct e1000_adapter *adapter)
1975 {
1976         struct e1000_hw *hw = &adapter->hw;
1977         u32 ctrl_ext;
1978         u32 swsm;
1979
1980         /* Let firmware know the driver has taken over */
1981         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
1982                 swsm = er32(SWSM);
1983                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
1984         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
1985                 ctrl_ext = er32(CTRL_EXT);
1986                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
1987         }
1988 }
1989
1990 /**
1991  * e1000_release_hw_control - release control of the h/w to f/w
1992  * @adapter: address of board private structure
1993  *
1994  * e1000_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
1995  * For ASF and Pass Through versions of f/w this means that the
1996  * driver is no longer loaded. For AMT version (only with 82573) i
1997  * of the f/w this means that the network i/f is closed.
1998  *
1999  **/
2000 static void e1000_release_hw_control(struct e1000_adapter *adapter)
2001 {
2002         struct e1000_hw *hw = &adapter->hw;
2003         u32 ctrl_ext;
2004         u32 swsm;
2005
2006         /* Let firmware taken over control of h/w */
2007         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2008                 swsm = er32(SWSM);
2009                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2010         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2011                 ctrl_ext = er32(CTRL_EXT);
2012                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2013         }
2014 }
2015
2016 /**
2017  * @e1000_alloc_ring - allocate memory for a ring structure
2018  **/
2019 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2020                                 struct e1000_ring *ring)
2021 {
2022         struct pci_dev *pdev = adapter->pdev;
2023
2024         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2025                                         GFP_KERNEL);
2026         if (!ring->desc)
2027                 return -ENOMEM;
2028
2029         return 0;
2030 }
2031
2032 /**
2033  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2034  * @adapter: board private structure
2035  *
2036  * Return 0 on success, negative on failure
2037  **/
2038 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
2039 {
2040         struct e1000_ring *tx_ring = adapter->tx_ring;
2041         int err = -ENOMEM, size;
2042
2043         size = sizeof(struct e1000_buffer) * tx_ring->count;
2044         tx_ring->buffer_info = vmalloc(size);
2045         if (!tx_ring->buffer_info)
2046                 goto err;
2047         memset(tx_ring->buffer_info, 0, size);
2048
2049         /* round up to nearest 4K */
2050         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2051         tx_ring->size = ALIGN(tx_ring->size, 4096);
2052
2053         err = e1000_alloc_ring_dma(adapter, tx_ring);
2054         if (err)
2055                 goto err;
2056
2057         tx_ring->next_to_use = 0;
2058         tx_ring->next_to_clean = 0;
2059
2060         return 0;
2061 err:
2062         vfree(tx_ring->buffer_info);
2063         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2064         return err;
2065 }
2066
2067 /**
2068  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2069  * @adapter: board private structure
2070  *
2071  * Returns 0 on success, negative on failure
2072  **/
2073 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
2074 {
2075         struct e1000_ring *rx_ring = adapter->rx_ring;
2076         struct e1000_buffer *buffer_info;
2077         int i, size, desc_len, err = -ENOMEM;
2078
2079         size = sizeof(struct e1000_buffer) * rx_ring->count;
2080         rx_ring->buffer_info = vmalloc(size);
2081         if (!rx_ring->buffer_info)
2082                 goto err;
2083         memset(rx_ring->buffer_info, 0, size);
2084
2085         for (i = 0; i < rx_ring->count; i++) {
2086                 buffer_info = &rx_ring->buffer_info[i];
2087                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2088                                                 sizeof(struct e1000_ps_page),
2089                                                 GFP_KERNEL);
2090                 if (!buffer_info->ps_pages)
2091                         goto err_pages;
2092         }
2093
2094         desc_len = sizeof(union e1000_rx_desc_packet_split);
2095
2096         /* Round up to nearest 4K */
2097         rx_ring->size = rx_ring->count * desc_len;
2098         rx_ring->size = ALIGN(rx_ring->size, 4096);
2099
2100         err = e1000_alloc_ring_dma(adapter, rx_ring);
2101         if (err)
2102                 goto err_pages;
2103
2104         rx_ring->next_to_clean = 0;
2105         rx_ring->next_to_use = 0;
2106         rx_ring->rx_skb_top = NULL;
2107
2108         return 0;
2109
2110 err_pages:
2111         for (i = 0; i < rx_ring->count; i++) {
2112                 buffer_info = &rx_ring->buffer_info[i];
2113                 kfree(buffer_info->ps_pages);
2114         }
2115 err:
2116         vfree(rx_ring->buffer_info);
2117         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2118         return err;
2119 }
2120
2121 /**
2122  * e1000_clean_tx_ring - Free Tx Buffers
2123  * @adapter: board private structure
2124  **/
2125 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
2126 {
2127         struct e1000_ring *tx_ring = adapter->tx_ring;
2128         struct e1000_buffer *buffer_info;
2129         unsigned long size;
2130         unsigned int i;
2131
2132         for (i = 0; i < tx_ring->count; i++) {
2133                 buffer_info = &tx_ring->buffer_info[i];
2134                 e1000_put_txbuf(adapter, buffer_info);
2135         }
2136
2137         size = sizeof(struct e1000_buffer) * tx_ring->count;
2138         memset(tx_ring->buffer_info, 0, size);
2139
2140         memset(tx_ring->desc, 0, tx_ring->size);
2141
2142         tx_ring->next_to_use = 0;
2143         tx_ring->next_to_clean = 0;
2144
2145         writel(0, adapter->hw.hw_addr + tx_ring->head);
2146         writel(0, adapter->hw.hw_addr + tx_ring->tail);
2147 }
2148
2149 /**
2150  * e1000e_free_tx_resources - Free Tx Resources per Queue
2151  * @adapter: board private structure
2152  *
2153  * Free all transmit software resources
2154  **/
2155 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
2156 {
2157         struct pci_dev *pdev = adapter->pdev;
2158         struct e1000_ring *tx_ring = adapter->tx_ring;
2159
2160         e1000_clean_tx_ring(adapter);
2161
2162         vfree(tx_ring->buffer_info);
2163         tx_ring->buffer_info = NULL;
2164
2165         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2166                           tx_ring->dma);
2167         tx_ring->desc = NULL;
2168 }
2169
2170 /**
2171  * e1000e_free_rx_resources - Free Rx Resources
2172  * @adapter: board private structure
2173  *
2174  * Free all receive software resources
2175  **/
2176
2177 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
2178 {
2179         struct pci_dev *pdev = adapter->pdev;
2180         struct e1000_ring *rx_ring = adapter->rx_ring;
2181         int i;
2182
2183         e1000_clean_rx_ring(adapter);
2184
2185         for (i = 0; i < rx_ring->count; i++) {
2186                 kfree(rx_ring->buffer_info[i].ps_pages);
2187         }
2188
2189         vfree(rx_ring->buffer_info);
2190         rx_ring->buffer_info = NULL;
2191
2192         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2193                           rx_ring->dma);
2194         rx_ring->desc = NULL;
2195 }
2196
2197 /**
2198  * e1000_update_itr - update the dynamic ITR value based on statistics
2199  * @adapter: pointer to adapter
2200  * @itr_setting: current adapter->itr
2201  * @packets: the number of packets during this measurement interval
2202  * @bytes: the number of bytes during this measurement interval
2203  *
2204  *      Stores a new ITR value based on packets and byte
2205  *      counts during the last interrupt.  The advantage of per interrupt
2206  *      computation is faster updates and more accurate ITR for the current
2207  *      traffic pattern.  Constants in this function were computed
2208  *      based on theoretical maximum wire speed and thresholds were set based
2209  *      on testing data as well as attempting to minimize response time
2210  *      while increasing bulk throughput.  This functionality is controlled
2211  *      by the InterruptThrottleRate module parameter.
2212  **/
2213 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2214                                      u16 itr_setting, int packets,
2215                                      int bytes)
2216 {
2217         unsigned int retval = itr_setting;
2218
2219         if (packets == 0)
2220                 goto update_itr_done;
2221
2222         switch (itr_setting) {
2223         case lowest_latency:
2224                 /* handle TSO and jumbo frames */
2225                 if (bytes/packets > 8000)
2226                         retval = bulk_latency;
2227                 else if ((packets < 5) && (bytes > 512)) {
2228                         retval = low_latency;
2229                 }
2230                 break;
2231         case low_latency:  /* 50 usec aka 20000 ints/s */
2232                 if (bytes > 10000) {
2233                         /* this if handles the TSO accounting */
2234                         if (bytes/packets > 8000) {
2235                                 retval = bulk_latency;
2236                         } else if ((packets < 10) || ((bytes/packets) > 1200)) {
2237                                 retval = bulk_latency;
2238                         } else if ((packets > 35)) {
2239                                 retval = lowest_latency;
2240                         }
2241                 } else if (bytes/packets > 2000) {
2242                         retval = bulk_latency;
2243                 } else if (packets <= 2 && bytes < 512) {
2244                         retval = lowest_latency;
2245                 }
2246                 break;
2247         case bulk_latency: /* 250 usec aka 4000 ints/s */
2248                 if (bytes > 25000) {
2249                         if (packets > 35) {
2250                                 retval = low_latency;
2251                         }
2252                 } else if (bytes < 6000) {
2253                         retval = low_latency;
2254                 }
2255                 break;
2256         }
2257
2258 update_itr_done:
2259         return retval;
2260 }
2261
2262 static void e1000_set_itr(struct e1000_adapter *adapter)
2263 {
2264         struct e1000_hw *hw = &adapter->hw;
2265         u16 current_itr;
2266         u32 new_itr = adapter->itr;
2267
2268         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2269         if (adapter->link_speed != SPEED_1000) {
2270                 current_itr = 0;
2271                 new_itr = 4000;
2272                 goto set_itr_now;
2273         }
2274
2275         adapter->tx_itr = e1000_update_itr(adapter,
2276                                     adapter->tx_itr,
2277                                     adapter->total_tx_packets,
2278                                     adapter->total_tx_bytes);
2279         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2280         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2281                 adapter->tx_itr = low_latency;
2282
2283         adapter->rx_itr = e1000_update_itr(adapter,
2284                                     adapter->rx_itr,
2285                                     adapter->total_rx_packets,
2286                                     adapter->total_rx_bytes);
2287         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2288         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2289                 adapter->rx_itr = low_latency;
2290
2291         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2292
2293         switch (current_itr) {
2294         /* counts and packets in update_itr are dependent on these numbers */
2295         case lowest_latency:
2296                 new_itr = 70000;
2297                 break;
2298         case low_latency:
2299                 new_itr = 20000; /* aka hwitr = ~200 */
2300                 break;
2301         case bulk_latency:
2302                 new_itr = 4000;
2303                 break;
2304         default:
2305                 break;
2306         }
2307
2308 set_itr_now:
2309         if (new_itr != adapter->itr) {
2310                 /*
2311                  * this attempts to bias the interrupt rate towards Bulk
2312                  * by adding intermediate steps when interrupt rate is
2313                  * increasing
2314                  */
2315                 new_itr = new_itr > adapter->itr ?
2316                              min(adapter->itr + (new_itr >> 2), new_itr) :
2317                              new_itr;
2318                 adapter->itr = new_itr;
2319                 adapter->rx_ring->itr_val = new_itr;
2320                 if (adapter->msix_entries)
2321                         adapter->rx_ring->set_itr = 1;
2322                 else
2323                         ew32(ITR, 1000000000 / (new_itr * 256));
2324         }
2325 }
2326
2327 /**
2328  * e1000_alloc_queues - Allocate memory for all rings
2329  * @adapter: board private structure to initialize
2330  **/
2331 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
2332 {
2333         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2334         if (!adapter->tx_ring)
2335                 goto err;
2336
2337         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2338         if (!adapter->rx_ring)
2339                 goto err;
2340
2341         return 0;
2342 err:
2343         e_err("Unable to allocate memory for queues\n");
2344         kfree(adapter->rx_ring);
2345         kfree(adapter->tx_ring);
2346         return -ENOMEM;
2347 }
2348
2349 /**
2350  * e1000_clean - NAPI Rx polling callback
2351  * @napi: struct associated with this polling callback
2352  * @budget: amount of packets driver is allowed to process this poll
2353  **/
2354 static int e1000_clean(struct napi_struct *napi, int budget)
2355 {
2356         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
2357         struct e1000_hw *hw = &adapter->hw;
2358         struct net_device *poll_dev = adapter->netdev;
2359         int tx_cleaned = 1, work_done = 0;
2360
2361         adapter = netdev_priv(poll_dev);
2362
2363         if (adapter->msix_entries &&
2364             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2365                 goto clean_rx;
2366
2367         tx_cleaned = e1000_clean_tx_irq(adapter);
2368
2369 clean_rx:
2370         adapter->clean_rx(adapter, &work_done, budget);
2371
2372         if (!tx_cleaned)
2373                 work_done = budget;
2374
2375         /* If budget not fully consumed, exit the polling mode */
2376         if (work_done < budget) {
2377                 if (adapter->itr_setting & 3)
2378                         e1000_set_itr(adapter);
2379                 napi_complete(napi);
2380                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2381                         if (adapter->msix_entries)
2382                                 ew32(IMS, adapter->rx_ring->ims_val);
2383                         else
2384                                 e1000_irq_enable(adapter);
2385                 }
2386         }
2387
2388         return work_done;
2389 }
2390
2391 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2392 {
2393         struct e1000_adapter *adapter = netdev_priv(netdev);
2394         struct e1000_hw *hw = &adapter->hw;
2395         u32 vfta, index;
2396
2397         /* don't update vlan cookie if already programmed */
2398         if ((adapter->hw.mng_cookie.status &
2399              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2400             (vid == adapter->mng_vlan_id))
2401                 return;
2402
2403         /* add VID to filter table */
2404         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2405                 index = (vid >> 5) & 0x7F;
2406                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2407                 vfta |= (1 << (vid & 0x1F));
2408                 hw->mac.ops.write_vfta(hw, index, vfta);
2409         }
2410 }
2411
2412 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2413 {
2414         struct e1000_adapter *adapter = netdev_priv(netdev);
2415         struct e1000_hw *hw = &adapter->hw;
2416         u32 vfta, index;
2417
2418         if (!test_bit(__E1000_DOWN, &adapter->state))
2419                 e1000_irq_disable(adapter);
2420         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2421
2422         if (!test_bit(__E1000_DOWN, &adapter->state))
2423                 e1000_irq_enable(adapter);
2424
2425         if ((adapter->hw.mng_cookie.status &
2426              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2427             (vid == adapter->mng_vlan_id)) {
2428                 /* release control to f/w */
2429                 e1000_release_hw_control(adapter);
2430                 return;
2431         }
2432
2433         /* remove VID from filter table */
2434         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2435                 index = (vid >> 5) & 0x7F;
2436                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2437                 vfta &= ~(1 << (vid & 0x1F));
2438                 hw->mac.ops.write_vfta(hw, index, vfta);
2439         }
2440 }
2441
2442 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2443 {
2444         struct net_device *netdev = adapter->netdev;
2445         u16 vid = adapter->hw.mng_cookie.vlan_id;
2446         u16 old_vid = adapter->mng_vlan_id;
2447
2448         if (!adapter->vlgrp)
2449                 return;
2450
2451         if (!vlan_group_get_device(adapter->vlgrp, vid)) {
2452                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2453                 if (adapter->hw.mng_cookie.status &
2454                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2455                         e1000_vlan_rx_add_vid(netdev, vid);
2456                         adapter->mng_vlan_id = vid;
2457                 }
2458
2459                 if ((old_vid != (u16)E1000_MNG_VLAN_NONE) &&
2460                                 (vid != old_vid) &&
2461                     !vlan_group_get_device(adapter->vlgrp, old_vid))
2462                         e1000_vlan_rx_kill_vid(netdev, old_vid);
2463         } else {
2464                 adapter->mng_vlan_id = vid;
2465         }
2466 }
2467
2468
2469 static void e1000_vlan_rx_register(struct net_device *netdev,
2470                                    struct vlan_group *grp)
2471 {
2472         struct e1000_adapter *adapter = netdev_priv(netdev);
2473         struct e1000_hw *hw = &adapter->hw;
2474         u32 ctrl, rctl;
2475
2476         if (!test_bit(__E1000_DOWN, &adapter->state))
2477                 e1000_irq_disable(adapter);
2478         adapter->vlgrp = grp;
2479
2480         if (grp) {
2481                 /* enable VLAN tag insert/strip */
2482                 ctrl = er32(CTRL);
2483                 ctrl |= E1000_CTRL_VME;
2484                 ew32(CTRL, ctrl);
2485
2486                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2487                         /* enable VLAN receive filtering */
2488                         rctl = er32(RCTL);
2489                         rctl &= ~E1000_RCTL_CFIEN;
2490                         ew32(RCTL, rctl);
2491                         e1000_update_mng_vlan(adapter);
2492                 }
2493         } else {
2494                 /* disable VLAN tag insert/strip */
2495                 ctrl = er32(CTRL);
2496                 ctrl &= ~E1000_CTRL_VME;
2497                 ew32(CTRL, ctrl);
2498
2499                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2500                         if (adapter->mng_vlan_id !=
2501                             (u16)E1000_MNG_VLAN_NONE) {
2502                                 e1000_vlan_rx_kill_vid(netdev,
2503                                                        adapter->mng_vlan_id);
2504                                 adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2505                         }
2506                 }
2507         }
2508
2509         if (!test_bit(__E1000_DOWN, &adapter->state))
2510                 e1000_irq_enable(adapter);
2511 }
2512
2513 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2514 {
2515         u16 vid;
2516
2517         e1000_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2518
2519         if (!adapter->vlgrp)
2520                 return;
2521
2522         for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2523                 if (!vlan_group_get_device(adapter->vlgrp, vid))
2524                         continue;
2525                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2526         }
2527 }
2528
2529 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2530 {
2531         struct e1000_hw *hw = &adapter->hw;
2532         u32 manc, manc2h, mdef, i, j;
2533
2534         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2535                 return;
2536
2537         manc = er32(MANC);
2538
2539         /*
2540          * enable receiving management packets to the host. this will probably
2541          * generate destination unreachable messages from the host OS, but
2542          * the packets will be handled on SMBUS
2543          */
2544         manc |= E1000_MANC_EN_MNG2HOST;
2545         manc2h = er32(MANC2H);
2546
2547         switch (hw->mac.type) {
2548         default:
2549                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2550                 break;
2551         case e1000_82574:
2552         case e1000_82583:
2553                 /*
2554                  * Check if IPMI pass-through decision filter already exists;
2555                  * if so, enable it.
2556                  */
2557                 for (i = 0, j = 0; i < 8; i++) {
2558                         mdef = er32(MDEF(i));
2559
2560                         /* Ignore filters with anything other than IPMI ports */
2561                         if (mdef & !(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2562                                 continue;
2563
2564                         /* Enable this decision filter in MANC2H */
2565                         if (mdef)
2566                                 manc2h |= (1 << i);
2567
2568                         j |= mdef;
2569                 }
2570
2571                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2572                         break;
2573
2574                 /* Create new decision filter in an empty filter */
2575                 for (i = 0, j = 0; i < 8; i++)
2576                         if (er32(MDEF(i)) == 0) {
2577                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2578                                                E1000_MDEF_PORT_664));
2579                                 manc2h |= (1 << 1);
2580                                 j++;
2581                                 break;
2582                         }
2583
2584                 if (!j)
2585                         e_warn("Unable to create IPMI pass-through filter\n");
2586                 break;
2587         }
2588
2589         ew32(MANC2H, manc2h);
2590         ew32(MANC, manc);
2591 }
2592
2593 /**
2594  * e1000_configure_tx - Configure 8254x Transmit Unit after Reset
2595  * @adapter: board private structure
2596  *
2597  * Configure the Tx unit of the MAC after a reset.
2598  **/
2599 static void e1000_configure_tx(struct e1000_adapter *adapter)
2600 {
2601         struct e1000_hw *hw = &adapter->hw;
2602         struct e1000_ring *tx_ring = adapter->tx_ring;
2603         u64 tdba;
2604         u32 tdlen, tctl, tipg, tarc;
2605         u32 ipgr1, ipgr2;
2606
2607         /* Setup the HW Tx Head and Tail descriptor pointers */
2608         tdba = tx_ring->dma;
2609         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2610         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2611         ew32(TDBAH, (tdba >> 32));
2612         ew32(TDLEN, tdlen);
2613         ew32(TDH, 0);
2614         ew32(TDT, 0);
2615         tx_ring->head = E1000_TDH;
2616         tx_ring->tail = E1000_TDT;
2617
2618         /* Set the default values for the Tx Inter Packet Gap timer */
2619         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
2620         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
2621         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
2622
2623         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2624                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
2625
2626         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2627         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2628         ew32(TIPG, tipg);
2629
2630         /* Set the Tx Interrupt Delay register */
2631         ew32(TIDV, adapter->tx_int_delay);
2632         /* Tx irq moderation */
2633         ew32(TADV, adapter->tx_abs_int_delay);
2634
2635         /* Program the Transmit Control Register */
2636         tctl = er32(TCTL);
2637         tctl &= ~E1000_TCTL_CT;
2638         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2639                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2640
2641         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2642                 tarc = er32(TARC(0));
2643                 /*
2644                  * set the speed mode bit, we'll clear it if we're not at
2645                  * gigabit link later
2646                  */
2647 #define SPEED_MODE_BIT (1 << 21)
2648                 tarc |= SPEED_MODE_BIT;
2649                 ew32(TARC(0), tarc);
2650         }
2651
2652         /* errata: program both queues to unweighted RR */
2653         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2654                 tarc = er32(TARC(0));
2655                 tarc |= 1;
2656                 ew32(TARC(0), tarc);
2657                 tarc = er32(TARC(1));
2658                 tarc |= 1;
2659                 ew32(TARC(1), tarc);
2660         }
2661
2662         /* Setup Transmit Descriptor Settings for eop descriptor */
2663         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2664
2665         /* only set IDE if we are delaying interrupts using the timers */
2666         if (adapter->tx_int_delay)
2667                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2668
2669         /* enable Report Status bit */
2670         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2671
2672         ew32(TCTL, tctl);
2673
2674         e1000e_config_collision_dist(hw);
2675 }
2676
2677 /**
2678  * e1000_setup_rctl - configure the receive control registers
2679  * @adapter: Board private structure
2680  **/
2681 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2682                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2683 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2684 {
2685         struct e1000_hw *hw = &adapter->hw;
2686         u32 rctl, rfctl;
2687         u32 psrctl = 0;
2688         u32 pages = 0;
2689
2690         /* Program MC offset vector base */
2691         rctl = er32(RCTL);
2692         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2693         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2694                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2695                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2696
2697         /* Do not Store bad packets */
2698         rctl &= ~E1000_RCTL_SBP;
2699
2700         /* Enable Long Packet receive */
2701         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2702                 rctl &= ~E1000_RCTL_LPE;
2703         else
2704                 rctl |= E1000_RCTL_LPE;
2705
2706         /* Some systems expect that the CRC is included in SMBUS traffic. The
2707          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2708          * host memory when this is enabled
2709          */
2710         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2711                 rctl |= E1000_RCTL_SECRC;
2712
2713         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2714         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2715                 u16 phy_data;
2716
2717                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2718                 phy_data &= 0xfff8;
2719                 phy_data |= (1 << 2);
2720                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2721
2722                 e1e_rphy(hw, 22, &phy_data);
2723                 phy_data &= 0x0fff;
2724                 phy_data |= (1 << 14);
2725                 e1e_wphy(hw, 0x10, 0x2823);
2726                 e1e_wphy(hw, 0x11, 0x0003);
2727                 e1e_wphy(hw, 22, phy_data);
2728         }
2729
2730         /* Setup buffer sizes */
2731         rctl &= ~E1000_RCTL_SZ_4096;
2732         rctl |= E1000_RCTL_BSEX;
2733         switch (adapter->rx_buffer_len) {
2734         case 2048:
2735         default:
2736                 rctl |= E1000_RCTL_SZ_2048;
2737                 rctl &= ~E1000_RCTL_BSEX;
2738                 break;
2739         case 4096:
2740                 rctl |= E1000_RCTL_SZ_4096;
2741                 break;
2742         case 8192:
2743                 rctl |= E1000_RCTL_SZ_8192;
2744                 break;
2745         case 16384:
2746                 rctl |= E1000_RCTL_SZ_16384;
2747                 break;
2748         }
2749
2750         /*
2751          * 82571 and greater support packet-split where the protocol
2752          * header is placed in skb->data and the packet data is
2753          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2754          * In the case of a non-split, skb->data is linearly filled,
2755          * followed by the page buffers.  Therefore, skb->data is
2756          * sized to hold the largest protocol header.
2757          *
2758          * allocations using alloc_page take too long for regular MTU
2759          * so only enable packet split for jumbo frames
2760          *
2761          * Using pages when the page size is greater than 16k wastes
2762          * a lot of memory, since we allocate 3 pages at all times
2763          * per packet.
2764          */
2765         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2766         if (!(adapter->flags & FLAG_IS_ICH) && (pages <= 3) &&
2767             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2768                 adapter->rx_ps_pages = pages;
2769         else
2770                 adapter->rx_ps_pages = 0;
2771
2772         if (adapter->rx_ps_pages) {
2773                 /* Configure extra packet-split registers */
2774                 rfctl = er32(RFCTL);
2775                 rfctl |= E1000_RFCTL_EXTEN;
2776                 /*
2777                  * disable packet split support for IPv6 extension headers,
2778                  * because some malformed IPv6 headers can hang the Rx
2779                  */
2780                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2781                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2782
2783                 ew32(RFCTL, rfctl);
2784
2785                 /* Enable Packet split descriptors */
2786                 rctl |= E1000_RCTL_DTYP_PS;
2787
2788                 psrctl |= adapter->rx_ps_bsize0 >>
2789                         E1000_PSRCTL_BSIZE0_SHIFT;
2790
2791                 switch (adapter->rx_ps_pages) {
2792                 case 3:
2793                         psrctl |= PAGE_SIZE <<
2794                                 E1000_PSRCTL_BSIZE3_SHIFT;
2795                 case 2:
2796                         psrctl |= PAGE_SIZE <<
2797                                 E1000_PSRCTL_BSIZE2_SHIFT;
2798                 case 1:
2799                         psrctl |= PAGE_SIZE >>
2800                                 E1000_PSRCTL_BSIZE1_SHIFT;
2801                         break;
2802                 }
2803
2804                 ew32(PSRCTL, psrctl);
2805         }
2806
2807         ew32(RCTL, rctl);
2808         /* just started the receive unit, no need to restart */
2809         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2810 }
2811
2812 /**
2813  * e1000_configure_rx - Configure Receive Unit after Reset
2814  * @adapter: board private structure
2815  *
2816  * Configure the Rx unit of the MAC after a reset.
2817  **/
2818 static void e1000_configure_rx(struct e1000_adapter *adapter)
2819 {
2820         struct e1000_hw *hw = &adapter->hw;
2821         struct e1000_ring *rx_ring = adapter->rx_ring;
2822         u64 rdba;
2823         u32 rdlen, rctl, rxcsum, ctrl_ext;
2824
2825         if (adapter->rx_ps_pages) {
2826                 /* this is a 32 byte descriptor */
2827                 rdlen = rx_ring->count *
2828                         sizeof(union e1000_rx_desc_packet_split);
2829                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2830                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2831         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2832                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2833                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2834                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2835         } else {
2836                 rdlen = rx_ring->count * sizeof(struct e1000_rx_desc);
2837                 adapter->clean_rx = e1000_clean_rx_irq;
2838                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2839         }
2840
2841         /* disable receives while setting up the descriptors */
2842         rctl = er32(RCTL);
2843         ew32(RCTL, rctl & ~E1000_RCTL_EN);
2844         e1e_flush();
2845         msleep(10);
2846
2847         /* set the Receive Delay Timer Register */
2848         ew32(RDTR, adapter->rx_int_delay);
2849
2850         /* irq moderation */
2851         ew32(RADV, adapter->rx_abs_int_delay);
2852         if (adapter->itr_setting != 0)
2853                 ew32(ITR, 1000000000 / (adapter->itr * 256));
2854
2855         ctrl_ext = er32(CTRL_EXT);
2856         /* Auto-Mask interrupts upon ICR access */
2857         ctrl_ext |= E1000_CTRL_EXT_IAME;
2858         ew32(IAM, 0xffffffff);
2859         ew32(CTRL_EXT, ctrl_ext);
2860         e1e_flush();
2861
2862         /*
2863          * Setup the HW Rx Head and Tail Descriptor Pointers and
2864          * the Base and Length of the Rx Descriptor Ring
2865          */
2866         rdba = rx_ring->dma;
2867         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
2868         ew32(RDBAH, (rdba >> 32));
2869         ew32(RDLEN, rdlen);
2870         ew32(RDH, 0);
2871         ew32(RDT, 0);
2872         rx_ring->head = E1000_RDH;
2873         rx_ring->tail = E1000_RDT;
2874
2875         /* Enable Receive Checksum Offload for TCP and UDP */
2876         rxcsum = er32(RXCSUM);
2877         if (adapter->flags & FLAG_RX_CSUM_ENABLED) {
2878                 rxcsum |= E1000_RXCSUM_TUOFL;
2879
2880                 /*
2881                  * IPv4 payload checksum for UDP fragments must be
2882                  * used in conjunction with packet-split.
2883                  */
2884                 if (adapter->rx_ps_pages)
2885                         rxcsum |= E1000_RXCSUM_IPPCSE;
2886         } else {
2887                 rxcsum &= ~E1000_RXCSUM_TUOFL;
2888                 /* no need to clear IPPCSE as it defaults to 0 */
2889         }
2890         ew32(RXCSUM, rxcsum);
2891
2892         /*
2893          * Enable early receives on supported devices, only takes effect when
2894          * packet size is equal or larger than the specified value (in 8 byte
2895          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
2896          */
2897         if (adapter->flags & FLAG_HAS_ERT) {
2898                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
2899                         u32 rxdctl = er32(RXDCTL(0));
2900                         ew32(RXDCTL(0), rxdctl | 0x3);
2901                         ew32(ERT, E1000_ERT_2048 | (1 << 13));
2902                         /*
2903                          * With jumbo frames and early-receive enabled,
2904                          * excessive C-state transition latencies result in
2905                          * dropped transactions.
2906                          */
2907                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2908                                                   adapter->netdev->name, 55);
2909                 } else {
2910                         pm_qos_update_requirement(PM_QOS_CPU_DMA_LATENCY,
2911                                                   adapter->netdev->name,
2912                                                   PM_QOS_DEFAULT_VALUE);
2913                 }
2914         }
2915
2916         /* Enable Receives */
2917         ew32(RCTL, rctl);
2918 }
2919
2920 /**
2921  *  e1000_update_mc_addr_list - Update Multicast addresses
2922  *  @hw: pointer to the HW structure
2923  *  @mc_addr_list: array of multicast addresses to program
2924  *  @mc_addr_count: number of multicast addresses to program
2925  *
2926  *  Updates the Multicast Table Array.
2927  *  The caller must have a packed mc_addr_list of multicast addresses.
2928  **/
2929 static void e1000_update_mc_addr_list(struct e1000_hw *hw, u8 *mc_addr_list,
2930                                       u32 mc_addr_count)
2931 {
2932         hw->mac.ops.update_mc_addr_list(hw, mc_addr_list, mc_addr_count);
2933 }
2934
2935 /**
2936  * e1000_set_multi - Multicast and Promiscuous mode set
2937  * @netdev: network interface device structure
2938  *
2939  * The set_multi entry point is called whenever the multicast address
2940  * list or the network interface flags are updated.  This routine is
2941  * responsible for configuring the hardware for proper multicast,
2942  * promiscuous mode, and all-multi behavior.
2943  **/
2944 static void e1000_set_multi(struct net_device *netdev)
2945 {
2946         struct e1000_adapter *adapter = netdev_priv(netdev);
2947         struct e1000_hw *hw = &adapter->hw;
2948         struct netdev_hw_addr *ha;
2949         u8  *mta_list;
2950         u32 rctl;
2951         int i;
2952
2953         /* Check for Promiscuous and All Multicast modes */
2954
2955         rctl = er32(RCTL);
2956
2957         if (netdev->flags & IFF_PROMISC) {
2958                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
2959                 rctl &= ~E1000_RCTL_VFE;
2960         } else {
2961                 if (netdev->flags & IFF_ALLMULTI) {
2962                         rctl |= E1000_RCTL_MPE;
2963                         rctl &= ~E1000_RCTL_UPE;
2964                 } else {
2965                         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
2966                 }
2967                 if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
2968                         rctl |= E1000_RCTL_VFE;
2969         }
2970
2971         ew32(RCTL, rctl);
2972
2973         if (!netdev_mc_empty(netdev)) {
2974                 mta_list = kmalloc(netdev_mc_count(netdev) * 6, GFP_ATOMIC);
2975                 if (!mta_list)
2976                         return;
2977
2978                 /* prepare a packed array of only addresses. */
2979                 i = 0;
2980                 netdev_for_each_mc_addr(ha, netdev)
2981                         memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
2982
2983                 e1000_update_mc_addr_list(hw, mta_list, i);
2984                 kfree(mta_list);
2985         } else {
2986                 /*
2987                  * if we're called from probe, we might not have
2988                  * anything to do here, so clear out the list
2989                  */
2990                 e1000_update_mc_addr_list(hw, NULL, 0);
2991         }
2992 }
2993
2994 /**
2995  * e1000_configure - configure the hardware for Rx and Tx
2996  * @adapter: private board structure
2997  **/
2998 static void e1000_configure(struct e1000_adapter *adapter)
2999 {
3000         e1000_set_multi(adapter->netdev);
3001
3002         e1000_restore_vlan(adapter);
3003         e1000_init_manageability_pt(adapter);
3004
3005         e1000_configure_tx(adapter);
3006         e1000_setup_rctl(adapter);
3007         e1000_configure_rx(adapter);
3008         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring));
3009 }
3010
3011 /**
3012  * e1000e_power_up_phy - restore link in case the phy was powered down
3013  * @adapter: address of board private structure
3014  *
3015  * The phy may be powered down to save power and turn off link when the
3016  * driver is unloaded and wake on lan is not enabled (among others)
3017  * *** this routine MUST be followed by a call to e1000e_reset ***
3018  **/
3019 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3020 {
3021         if (adapter->hw.phy.ops.power_up)
3022                 adapter->hw.phy.ops.power_up(&adapter->hw);
3023
3024         adapter->hw.mac.ops.setup_link(&adapter->hw);
3025 }
3026
3027 /**
3028  * e1000_power_down_phy - Power down the PHY
3029  *
3030  * Power down the PHY so no link is implied when interface is down.
3031  * The PHY cannot be powered down if management or WoL is active.
3032  */
3033 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3034 {
3035         /* WoL is enabled */
3036         if (adapter->wol)
3037                 return;
3038
3039         if (adapter->hw.phy.ops.power_down)
3040                 adapter->hw.phy.ops.power_down(&adapter->hw);
3041 }
3042
3043 /**
3044  * e1000e_reset - bring the hardware into a known good state
3045  *
3046  * This function boots the hardware and enables some settings that
3047  * require a configuration cycle of the hardware - those cannot be
3048  * set/changed during runtime. After reset the device needs to be
3049  * properly configured for Rx, Tx etc.
3050  */
3051 void e1000e_reset(struct e1000_adapter *adapter)
3052 {
3053         struct e1000_mac_info *mac = &adapter->hw.mac;
3054         struct e1000_fc_info *fc = &adapter->hw.fc;
3055         struct e1000_hw *hw = &adapter->hw;
3056         u32 tx_space, min_tx_space, min_rx_space;
3057         u32 pba = adapter->pba;
3058         u16 hwm;
3059
3060         /* reset Packet Buffer Allocation to default */
3061         ew32(PBA, pba);
3062
3063         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3064                 /*
3065                  * To maintain wire speed transmits, the Tx FIFO should be
3066                  * large enough to accommodate two full transmit packets,
3067                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3068                  * the Rx FIFO should be large enough to accommodate at least
3069                  * one full receive packet and is similarly rounded up and
3070                  * expressed in KB.
3071                  */
3072                 pba = er32(PBA);
3073                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3074                 tx_space = pba >> 16;
3075                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3076                 pba &= 0xffff;
3077                 /*
3078                  * the Tx fifo also stores 16 bytes of information about the tx
3079                  * but don't include ethernet FCS because hardware appends it
3080                  */
3081                 min_tx_space = (adapter->max_frame_size +
3082                                 sizeof(struct e1000_tx_desc) -
3083                                 ETH_FCS_LEN) * 2;
3084                 min_tx_space = ALIGN(min_tx_space, 1024);
3085                 min_tx_space >>= 10;
3086                 /* software strips receive CRC, so leave room for it */
3087                 min_rx_space = adapter->max_frame_size;
3088                 min_rx_space = ALIGN(min_rx_space, 1024);
3089                 min_rx_space >>= 10;
3090
3091                 /*
3092                  * If current Tx allocation is less than the min Tx FIFO size,
3093                  * and the min Tx FIFO size is less than the current Rx FIFO
3094                  * allocation, take space away from current Rx allocation
3095                  */
3096                 if ((tx_space < min_tx_space) &&
3097                     ((min_tx_space - tx_space) < pba)) {
3098                         pba -= min_tx_space - tx_space;
3099
3100                         /*
3101                          * if short on Rx space, Rx wins and must trump tx
3102                          * adjustment or use Early Receive if available
3103                          */
3104                         if ((pba < min_rx_space) &&
3105                             (!(adapter->flags & FLAG_HAS_ERT)))
3106                                 /* ERT enabled in e1000_configure_rx */
3107                                 pba = min_rx_space;
3108                 }
3109
3110                 ew32(PBA, pba);
3111         }
3112
3113
3114         /*
3115          * flow control settings
3116          *
3117          * The high water mark must be low enough to fit one full frame
3118          * (or the size used for early receive) above it in the Rx FIFO.
3119          * Set it to the lower of:
3120          * - 90% of the Rx FIFO size, and
3121          * - the full Rx FIFO size minus the early receive size (for parts
3122          *   with ERT support assuming ERT set to E1000_ERT_2048), or
3123          * - the full Rx FIFO size minus one full frame
3124          */
3125         if (hw->mac.type == e1000_pchlan) {
3126                 /*
3127                  * Workaround PCH LOM adapter hangs with certain network
3128                  * loads.  If hangs persist, try disabling Tx flow control.
3129                  */
3130                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3131                         fc->high_water = 0x3500;
3132                         fc->low_water  = 0x1500;
3133                 } else {
3134                         fc->high_water = 0x5000;
3135                         fc->low_water  = 0x3000;
3136                 }
3137         } else {
3138                 if ((adapter->flags & FLAG_HAS_ERT) &&
3139                     (adapter->netdev->mtu > ETH_DATA_LEN))
3140                         hwm = min(((pba << 10) * 9 / 10),
3141                                   ((pba << 10) - (E1000_ERT_2048 << 3)));
3142                 else
3143                         hwm = min(((pba << 10) * 9 / 10),
3144                                   ((pba << 10) - adapter->max_frame_size));
3145
3146                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3147                 fc->low_water = fc->high_water - 8;
3148         }
3149
3150         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3151                 fc->pause_time = 0xFFFF;
3152         else
3153                 fc->pause_time = E1000_FC_PAUSE_TIME;
3154         fc->send_xon = 1;
3155         fc->current_mode = fc->requested_mode;
3156
3157         /* Allow time for pending master requests to run */
3158         mac->ops.reset_hw(hw);
3159
3160         /*
3161          * For parts with AMT enabled, let the firmware know
3162          * that the network interface is in control
3163          */
3164         if (adapter->flags & FLAG_HAS_AMT)
3165                 e1000_get_hw_control(adapter);
3166
3167         ew32(WUC, 0);
3168         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP)
3169                 e1e_wphy(&adapter->hw, BM_WUC, 0);
3170
3171         if (mac->ops.init_hw(hw))
3172                 e_err("Hardware Error\n");
3173
3174         /* additional part of the flow-control workaround above */
3175         if (hw->mac.type == e1000_pchlan)
3176                 ew32(FCRTV_PCH, 0x1000);
3177
3178         e1000_update_mng_vlan(adapter);
3179
3180         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3181         ew32(VET, ETH_P_8021Q);
3182
3183         e1000e_reset_adaptive(hw);
3184         e1000_get_phy_info(hw);
3185
3186         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3187             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3188                 u16 phy_data = 0;
3189                 /*
3190                  * speed up time to link by disabling smart power down, ignore
3191                  * the return value of this function because there is nothing
3192                  * different we would do if it failed
3193                  */
3194                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3195                 phy_data &= ~IGP02E1000_PM_SPD;
3196                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3197         }
3198 }
3199
3200 int e1000e_up(struct e1000_adapter *adapter)
3201 {
3202         struct e1000_hw *hw = &adapter->hw;
3203
3204         /* DMA latency requirement to workaround early-receive/jumbo issue */
3205         if (adapter->flags & FLAG_HAS_ERT)
3206                 pm_qos_add_requirement(PM_QOS_CPU_DMA_LATENCY,
3207                                        adapter->netdev->name,
3208                                        PM_QOS_DEFAULT_VALUE);
3209
3210         /* hardware has been reset, we need to reload some things */
3211         e1000_configure(adapter);
3212
3213         clear_bit(__E1000_DOWN, &adapter->state);
3214
3215         napi_enable(&adapter->napi);
3216         if (adapter->msix_entries)
3217                 e1000_configure_msix(adapter);
3218         e1000_irq_enable(adapter);
3219
3220         netif_wake_queue(adapter->netdev);
3221
3222         /* fire a link change interrupt to start the watchdog */
3223         if (adapter->msix_entries)
3224                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3225         else
3226                 ew32(ICS, E1000_ICS_LSC);
3227
3228         return 0;
3229 }
3230
3231 void e1000e_down(struct e1000_adapter *adapter)
3232 {
3233         struct net_device *netdev = adapter->netdev;
3234         struct e1000_hw *hw = &adapter->hw;
3235         u32 tctl, rctl;
3236
3237         /*
3238          * signal that we're down so the interrupt handler does not
3239          * reschedule our watchdog timer
3240          */
3241         set_bit(__E1000_DOWN, &adapter->state);
3242
3243         /* disable receives in the hardware */
3244         rctl = er32(RCTL);
3245         ew32(RCTL, rctl & ~E1000_RCTL_EN);
3246         /* flush and sleep below */
3247
3248         netif_stop_queue(netdev);
3249
3250         /* disable transmits in the hardware */
3251         tctl = er32(TCTL);
3252         tctl &= ~E1000_TCTL_EN;
3253         ew32(TCTL, tctl);
3254         /* flush both disables and wait for them to finish */
3255         e1e_flush();
3256         msleep(10);
3257
3258         napi_disable(&adapter->napi);
3259         e1000_irq_disable(adapter);
3260
3261         del_timer_sync(&adapter->watchdog_timer);
3262         del_timer_sync(&adapter->phy_info_timer);
3263
3264         netif_carrier_off(netdev);
3265         adapter->link_speed = 0;
3266         adapter->link_duplex = 0;
3267
3268         if (!pci_channel_offline(adapter->pdev))
3269                 e1000e_reset(adapter);
3270         e1000_clean_tx_ring(adapter);
3271         e1000_clean_rx_ring(adapter);
3272
3273         if (adapter->flags & FLAG_HAS_ERT)
3274                 pm_qos_remove_requirement(PM_QOS_CPU_DMA_LATENCY,
3275                                           adapter->netdev->name);
3276
3277         /*
3278          * TODO: for power management, we could drop the link and
3279          * pci_disable_device here.
3280          */
3281 }
3282
3283 void e1000e_reinit_locked(struct e1000_adapter *adapter)
3284 {
3285         might_sleep();
3286         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3287                 msleep(1);
3288         e1000e_down(adapter);
3289         e1000e_up(adapter);
3290         clear_bit(__E1000_RESETTING, &adapter->state);
3291 }
3292
3293 /**
3294  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
3295  * @adapter: board private structure to initialize
3296  *
3297  * e1000_sw_init initializes the Adapter private data structure.
3298  * Fields are initialized based on PCI device information and
3299  * OS network device settings (MTU size).
3300  **/
3301 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
3302 {
3303         struct net_device *netdev = adapter->netdev;
3304
3305         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
3306         adapter->rx_ps_bsize0 = 128;
3307         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3308         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
3309
3310         e1000e_set_interrupt_capability(adapter);
3311
3312         if (e1000_alloc_queues(adapter))
3313                 return -ENOMEM;
3314
3315         /* Explicitly disable IRQ since the NIC can be in any state. */
3316         e1000_irq_disable(adapter);
3317
3318         set_bit(__E1000_DOWN, &adapter->state);
3319         return 0;
3320 }
3321
3322 /**
3323  * e1000_intr_msi_test - Interrupt Handler
3324  * @irq: interrupt number
3325  * @data: pointer to a network interface device structure
3326  **/
3327 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
3328 {
3329         struct net_device *netdev = data;
3330         struct e1000_adapter *adapter = netdev_priv(netdev);
3331         struct e1000_hw *hw = &adapter->hw;
3332         u32 icr = er32(ICR);
3333
3334         e_dbg("icr is %08X\n", icr);
3335         if (icr & E1000_ICR_RXSEQ) {
3336                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
3337                 wmb();
3338         }
3339
3340         return IRQ_HANDLED;
3341 }
3342
3343 /**
3344  * e1000_test_msi_interrupt - Returns 0 for successful test
3345  * @adapter: board private struct
3346  *
3347  * code flow taken from tg3.c
3348  **/
3349 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
3350 {
3351         struct net_device *netdev = adapter->netdev;
3352         struct e1000_hw *hw = &adapter->hw;
3353         int err;
3354
3355         /* poll_enable hasn't been called yet, so don't need disable */
3356         /* clear any pending events */
3357         er32(ICR);
3358
3359         /* free the real vector and request a test handler */
3360         e1000_free_irq(adapter);
3361         e1000e_reset_interrupt_capability(adapter);
3362
3363         /* Assume that the test fails, if it succeeds then the test
3364          * MSI irq handler will unset this flag */
3365         adapter->flags |= FLAG_MSI_TEST_FAILED;
3366
3367         err = pci_enable_msi(adapter->pdev);
3368         if (err)
3369                 goto msi_test_failed;
3370
3371         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
3372                           netdev->name, netdev);
3373         if (err) {
3374                 pci_disable_msi(adapter->pdev);
3375                 goto msi_test_failed;
3376         }
3377
3378         wmb();
3379
3380         e1000_irq_enable(adapter);
3381
3382         /* fire an unusual interrupt on the test handler */
3383         ew32(ICS, E1000_ICS_RXSEQ);
3384         e1e_flush();
3385         msleep(50);
3386
3387         e1000_irq_disable(adapter);
3388
3389         rmb();
3390
3391         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3392                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3393                 err = -EIO;
3394                 e_info("MSI interrupt test failed!\n");
3395         }
3396
3397         free_irq(adapter->pdev->irq, netdev);
3398         pci_disable_msi(adapter->pdev);
3399
3400         if (err == -EIO)
3401                 goto msi_test_failed;
3402
3403         /* okay so the test worked, restore settings */
3404         e_dbg("MSI interrupt test succeeded!\n");
3405 msi_test_failed:
3406         e1000e_set_interrupt_capability(adapter);
3407         e1000_request_irq(adapter);
3408         return err;
3409 }
3410
3411 /**
3412  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3413  * @adapter: board private struct
3414  *
3415  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3416  **/
3417 static int e1000_test_msi(struct e1000_adapter *adapter)
3418 {
3419         int err;
3420         u16 pci_cmd;
3421
3422         if (!(adapter->flags & FLAG_MSI_ENABLED))
3423                 return 0;
3424
3425         /* disable SERR in case the MSI write causes a master abort */
3426         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3427         pci_write_config_word(adapter->pdev, PCI_COMMAND,
3428                               pci_cmd & ~PCI_COMMAND_SERR);
3429
3430         err = e1000_test_msi_interrupt(adapter);
3431
3432         /* restore previous setting of command word */
3433         pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3434
3435         /* success ! */
3436         if (!err)
3437                 return 0;
3438
3439         /* EIO means MSI test failed */
3440         if (err != -EIO)
3441                 return err;
3442
3443         /* back to INTx mode */
3444         e_warn("MSI interrupt test failed, using legacy interrupt.\n");
3445
3446         e1000_free_irq(adapter);
3447
3448         err = e1000_request_irq(adapter);
3449
3450         return err;
3451 }
3452
3453 /**
3454  * e1000_open - Called when a network interface is made active
3455  * @netdev: network interface device structure
3456  *
3457  * Returns 0 on success, negative value on failure
3458  *
3459  * The open entry point is called when a network interface is made
3460  * active by the system (IFF_UP).  At this point all resources needed
3461  * for transmit and receive operations are allocated, the interrupt
3462  * handler is registered with the OS, the watchdog timer is started,
3463  * and the stack is notified that the interface is ready.
3464  **/
3465 static int e1000_open(struct net_device *netdev)
3466 {
3467         struct e1000_adapter *adapter = netdev_priv(netdev);
3468         struct e1000_hw *hw = &adapter->hw;
3469         struct pci_dev *pdev = adapter->pdev;
3470         int err;
3471
3472         /* disallow open during test */
3473         if (test_bit(__E1000_TESTING, &adapter->state))
3474                 return -EBUSY;
3475
3476         pm_runtime_get_sync(&pdev->dev);
3477
3478         netif_carrier_off(netdev);
3479
3480         /* allocate transmit descriptors */
3481         err = e1000e_setup_tx_resources(adapter);
3482         if (err)
3483                 goto err_setup_tx;
3484
3485         /* allocate receive descriptors */
3486         err = e1000e_setup_rx_resources(adapter);
3487         if (err)
3488                 goto err_setup_rx;
3489
3490         /*
3491          * If AMT is enabled, let the firmware know that the network
3492          * interface is now open and reset the part to a known state.
3493          */
3494         if (adapter->flags & FLAG_HAS_AMT) {
3495                 e1000_get_hw_control(adapter);
3496                 e1000e_reset(adapter);
3497         }
3498
3499         e1000e_power_up_phy(adapter);
3500
3501         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3502         if ((adapter->hw.mng_cookie.status &
3503              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3504                 e1000_update_mng_vlan(adapter);
3505
3506         /*
3507          * before we allocate an interrupt, we must be ready to handle it.
3508          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3509          * as soon as we call pci_request_irq, so we have to setup our
3510          * clean_rx handler before we do so.
3511          */
3512         e1000_configure(adapter);
3513
3514         err = e1000_request_irq(adapter);
3515         if (err)
3516                 goto err_req_irq;
3517
3518         /*
3519          * Work around PCIe errata with MSI interrupts causing some chipsets to
3520          * ignore e1000e MSI messages, which means we need to test our MSI
3521          * interrupt now
3522          */
3523         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3524                 err = e1000_test_msi(adapter);
3525                 if (err) {
3526                         e_err("Interrupt allocation failed\n");
3527                         goto err_req_irq;
3528                 }
3529         }
3530
3531         /* From here on the code is the same as e1000e_up() */
3532         clear_bit(__E1000_DOWN, &adapter->state);
3533
3534         napi_enable(&adapter->napi);
3535
3536         e1000_irq_enable(adapter);
3537
3538         netif_start_queue(netdev);
3539
3540         adapter->idle_check = true;
3541         pm_runtime_put(&pdev->dev);
3542
3543         /* fire a link status change interrupt to start the watchdog */
3544         if (adapter->msix_entries)
3545                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3546         else
3547                 ew32(ICS, E1000_ICS_LSC);
3548
3549         return 0;
3550
3551 err_req_irq:
3552         e1000_release_hw_control(adapter);
3553         e1000_power_down_phy(adapter);
3554         e1000e_free_rx_resources(adapter);
3555 err_setup_rx:
3556         e1000e_free_tx_resources(adapter);
3557 err_setup_tx:
3558         e1000e_reset(adapter);
3559         pm_runtime_put_sync(&pdev->dev);
3560
3561         return err;
3562 }
3563
3564 /**
3565  * e1000_close - Disables a network interface
3566  * @netdev: network interface device structure
3567  *
3568  * Returns 0, this is not allowed to fail
3569  *
3570  * The close entry point is called when an interface is de-activated
3571  * by the OS.  The hardware is still under the drivers control, but
3572  * needs to be disabled.  A global MAC reset is issued to stop the
3573  * hardware, and all transmit and receive resources are freed.
3574  **/
3575 static int e1000_close(struct net_device *netdev)
3576 {
3577         struct e1000_adapter *adapter = netdev_priv(netdev);
3578         struct pci_dev *pdev = adapter->pdev;
3579
3580         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3581
3582         pm_runtime_get_sync(&pdev->dev);
3583
3584         if (!test_bit(__E1000_DOWN, &adapter->state)) {
3585                 e1000e_down(adapter);
3586                 e1000_free_irq(adapter);
3587         }
3588         e1000_power_down_phy(adapter);
3589
3590         e1000e_free_tx_resources(adapter);
3591         e1000e_free_rx_resources(adapter);
3592
3593         /*
3594          * kill manageability vlan ID if supported, but not if a vlan with
3595          * the same ID is registered on the host OS (let 8021q kill it)
3596          */
3597         if ((adapter->hw.mng_cookie.status &
3598                           E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
3599              !(adapter->vlgrp &&
3600                vlan_group_get_device(adapter->vlgrp, adapter->mng_vlan_id)))
3601                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3602
3603         /*
3604          * If AMT is enabled, let the firmware know that the network
3605          * interface is now closed
3606          */
3607         if (adapter->flags & FLAG_HAS_AMT)
3608                 e1000_release_hw_control(adapter);
3609
3610         pm_runtime_put_sync(&pdev->dev);
3611
3612         return 0;
3613 }
3614 /**
3615  * e1000_set_mac - Change the Ethernet Address of the NIC
3616  * @netdev: network interface device structure
3617  * @p: pointer to an address structure
3618  *
3619  * Returns 0 on success, negative on failure
3620  **/
3621 static int e1000_set_mac(struct net_device *netdev, void *p)
3622 {
3623         struct e1000_adapter *adapter = netdev_priv(netdev);
3624         struct sockaddr *addr = p;
3625
3626         if (!is_valid_ether_addr(addr->sa_data))
3627                 return -EADDRNOTAVAIL;
3628
3629         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3630         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3631
3632         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3633
3634         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3635                 /* activate the work around */
3636                 e1000e_set_laa_state_82571(&adapter->hw, 1);
3637
3638                 /*
3639                  * Hold a copy of the LAA in RAR[14] This is done so that
3640                  * between the time RAR[0] gets clobbered  and the time it
3641                  * gets fixed (in e1000_watchdog), the actual LAA is in one
3642                  * of the RARs and no incoming packets directed to this port
3643                  * are dropped. Eventually the LAA will be in RAR[0] and
3644                  * RAR[14]
3645                  */
3646                 e1000e_rar_set(&adapter->hw,
3647                               adapter->hw.mac.addr,
3648                               adapter->hw.mac.rar_entry_count - 1);
3649         }
3650
3651         return 0;
3652 }
3653
3654 /**
3655  * e1000e_update_phy_task - work thread to update phy
3656  * @work: pointer to our work struct
3657  *
3658  * this worker thread exists because we must acquire a
3659  * semaphore to read the phy, which we could msleep while
3660  * waiting for it, and we can't msleep in a timer.
3661  **/
3662 static void e1000e_update_phy_task(struct work_struct *work)
3663 {
3664         struct e1000_adapter *adapter = container_of(work,
3665                                         struct e1000_adapter, update_phy_task);
3666         e1000_get_phy_info(&adapter->hw);
3667 }
3668
3669 /*
3670  * Need to wait a few seconds after link up to get diagnostic information from
3671  * the phy
3672  */
3673 static void e1000_update_phy_info(unsigned long data)
3674 {
3675         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3676         schedule_work(&adapter->update_phy_task);
3677 }
3678
3679 /**
3680  * e1000e_update_stats - Update the board statistics counters
3681  * @adapter: board private structure
3682  **/
3683 void e1000e_update_stats(struct e1000_adapter *adapter)
3684 {
3685         struct net_device *netdev = adapter->netdev;
3686         struct e1000_hw *hw = &adapter->hw;
3687         struct pci_dev *pdev = adapter->pdev;
3688         u16 phy_data;
3689
3690         /*
3691          * Prevent stats update while adapter is being reset, or if the pci
3692          * connection is down.
3693          */
3694         if (adapter->link_speed == 0)
3695                 return;
3696         if (pci_channel_offline(pdev))
3697                 return;
3698
3699         adapter->stats.crcerrs += er32(CRCERRS);
3700         adapter->stats.gprc += er32(GPRC);
3701         adapter->stats.gorc += er32(GORCL);
3702         er32(GORCH); /* Clear gorc */
3703         adapter->stats.bprc += er32(BPRC);
3704         adapter->stats.mprc += er32(MPRC);
3705         adapter->stats.roc += er32(ROC);
3706
3707         adapter->stats.mpc += er32(MPC);
3708         if ((hw->phy.type == e1000_phy_82578) ||
3709             (hw->phy.type == e1000_phy_82577)) {
3710                 e1e_rphy(hw, HV_SCC_UPPER, &phy_data);
3711                 if (!e1e_rphy(hw, HV_SCC_LOWER, &phy_data))
3712                         adapter->stats.scc += phy_data;
3713
3714                 e1e_rphy(hw, HV_ECOL_UPPER, &phy_data);
3715                 if (!e1e_rphy(hw, HV_ECOL_LOWER, &phy_data))
3716                         adapter->stats.ecol += phy_data;
3717
3718                 e1e_rphy(hw, HV_MCC_UPPER, &phy_data);
3719                 if (!e1e_rphy(hw, HV_MCC_LOWER, &phy_data))
3720                         adapter->stats.mcc += phy_data;
3721
3722                 e1e_rphy(hw, HV_LATECOL_UPPER, &phy_data);
3723                 if (!e1e_rphy(hw, HV_LATECOL_LOWER, &phy_data))
3724                         adapter->stats.latecol += phy_data;
3725
3726                 e1e_rphy(hw, HV_DC_UPPER, &phy_data);
3727                 if (!e1e_rphy(hw, HV_DC_LOWER, &phy_data))
3728                         adapter->stats.dc += phy_data;
3729         } else {
3730                 adapter->stats.scc += er32(SCC);
3731                 adapter->stats.ecol += er32(ECOL);
3732                 adapter->stats.mcc += er32(MCC);
3733                 adapter->stats.latecol += er32(LATECOL);
3734                 adapter->stats.dc += er32(DC);
3735         }
3736         adapter->stats.xonrxc += er32(XONRXC);
3737         adapter->stats.xontxc += er32(XONTXC);
3738         adapter->stats.xoffrxc += er32(XOFFRXC);
3739         adapter->stats.xofftxc += er32(XOFFTXC);
3740         adapter->stats.gptc += er32(GPTC);
3741         adapter->stats.gotc += er32(GOTCL);
3742         er32(GOTCH); /* Clear gotc */
3743         adapter->stats.rnbc += er32(RNBC);
3744         adapter->stats.ruc += er32(RUC);
3745
3746         adapter->stats.mptc += er32(MPTC);
3747         adapter->stats.bptc += er32(BPTC);
3748
3749         /* used for adaptive IFS */
3750
3751         hw->mac.tx_packet_delta = er32(TPT);
3752         adapter->stats.tpt += hw->mac.tx_packet_delta;
3753         if ((hw->phy.type == e1000_phy_82578) ||
3754             (hw->phy.type == e1000_phy_82577)) {
3755                 e1e_rphy(hw, HV_COLC_UPPER, &phy_data);
3756                 if (!e1e_rphy(hw, HV_COLC_LOWER, &phy_data))
3757                         hw->mac.collision_delta = phy_data;
3758         } else {
3759                 hw->mac.collision_delta = er32(COLC);
3760         }
3761         adapter->stats.colc += hw->mac.collision_delta;
3762
3763         adapter->stats.algnerrc += er32(ALGNERRC);
3764         adapter->stats.rxerrc += er32(RXERRC);
3765         if ((hw->phy.type == e1000_phy_82578) ||
3766             (hw->phy.type == e1000_phy_82577)) {
3767                 e1e_rphy(hw, HV_TNCRS_UPPER, &phy_data);
3768                 if (!e1e_rphy(hw, HV_TNCRS_LOWER, &phy_data))
3769                         adapter->stats.tncrs += phy_data;
3770         } else {
3771                 if ((hw->mac.type != e1000_82574) &&
3772                     (hw->mac.type != e1000_82583))
3773                         adapter->stats.tncrs += er32(TNCRS);
3774         }
3775         adapter->stats.cexterr += er32(CEXTERR);
3776         adapter->stats.tsctc += er32(TSCTC);
3777         adapter->stats.tsctfc += er32(TSCTFC);
3778
3779         /* Fill out the OS statistics structure */
3780         netdev->stats.multicast = adapter->stats.mprc;
3781         netdev->stats.collisions = adapter->stats.colc;
3782
3783         /* Rx Errors */
3784
3785         /*
3786          * RLEC on some newer hardware can be incorrect so build
3787          * our own version based on RUC and ROC
3788          */
3789         netdev->stats.rx_errors = adapter->stats.rxerrc +
3790                 adapter->stats.crcerrs + adapter->stats.algnerrc +
3791                 adapter->stats.ruc + adapter->stats.roc +
3792                 adapter->stats.cexterr;
3793         netdev->stats.rx_length_errors = adapter->stats.ruc +
3794                                               adapter->stats.roc;
3795         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
3796         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
3797         netdev->stats.rx_missed_errors = adapter->stats.mpc;
3798
3799         /* Tx Errors */
3800         netdev->stats.tx_errors = adapter->stats.ecol +
3801                                        adapter->stats.latecol;
3802         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
3803         netdev->stats.tx_window_errors = adapter->stats.latecol;
3804         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
3805
3806         /* Tx Dropped needs to be maintained elsewhere */
3807
3808         /* Management Stats */
3809         adapter->stats.mgptc += er32(MGTPTC);
3810         adapter->stats.mgprc += er32(MGTPRC);
3811         adapter->stats.mgpdc += er32(MGTPDC);
3812 }
3813
3814 /**
3815  * e1000_phy_read_status - Update the PHY register status snapshot
3816  * @adapter: board private structure
3817  **/
3818 static void e1000_phy_read_status(struct e1000_adapter *adapter)
3819 {
3820         struct e1000_hw *hw = &adapter->hw;
3821         struct e1000_phy_regs *phy = &adapter->phy_regs;
3822         int ret_val;
3823
3824         if ((er32(STATUS) & E1000_STATUS_LU) &&
3825             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
3826                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
3827                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
3828                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
3829                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
3830                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
3831                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
3832                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
3833                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
3834                 if (ret_val)
3835                         e_warn("Error reading PHY register\n");
3836         } else {
3837                 /*
3838                  * Do not read PHY registers if link is not up
3839                  * Set values to typical power-on defaults
3840                  */
3841                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
3842                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
3843                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
3844                              BMSR_ERCAP);
3845                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
3846                                   ADVERTISE_ALL | ADVERTISE_CSMA);
3847                 phy->lpa = 0;
3848                 phy->expansion = EXPANSION_ENABLENPAGE;
3849                 phy->ctrl1000 = ADVERTISE_1000FULL;
3850                 phy->stat1000 = 0;
3851                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
3852         }
3853 }
3854
3855 static void e1000_print_link_info(struct e1000_adapter *adapter)
3856 {
3857         struct e1000_hw *hw = &adapter->hw;
3858         u32 ctrl = er32(CTRL);
3859
3860         /* Link status message must follow this format for user tools */
3861         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s, "
3862                "Flow Control: %s\n",
3863                adapter->netdev->name,
3864                adapter->link_speed,
3865                (adapter->link_duplex == FULL_DUPLEX) ?
3866                                 "Full Duplex" : "Half Duplex",
3867                ((ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE)) ?
3868                                 "RX/TX" :
3869                ((ctrl & E1000_CTRL_RFCE) ? "RX" :
3870                ((ctrl & E1000_CTRL_TFCE) ? "TX" : "None" )));
3871 }
3872
3873 bool e1000e_has_link(struct e1000_adapter *adapter)
3874 {
3875         struct e1000_hw *hw = &adapter->hw;
3876         bool link_active = 0;
3877         s32 ret_val = 0;
3878
3879         /*
3880          * get_link_status is set on LSC (link status) interrupt or
3881          * Rx sequence error interrupt.  get_link_status will stay
3882          * false until the check_for_link establishes link
3883          * for copper adapters ONLY
3884          */
3885         switch (hw->phy.media_type) {
3886         case e1000_media_type_copper:
3887                 if (hw->mac.get_link_status) {
3888                         ret_val = hw->mac.ops.check_for_link(hw);
3889                         link_active = !hw->mac.get_link_status;
3890                 } else {
3891                         link_active = 1;
3892                 }
3893                 break;
3894         case e1000_media_type_fiber:
3895                 ret_val = hw->mac.ops.check_for_link(hw);
3896                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
3897                 break;
3898         case e1000_media_type_internal_serdes:
3899                 ret_val = hw->mac.ops.check_for_link(hw);
3900                 link_active = adapter->hw.mac.serdes_has_link;
3901                 break;
3902         default:
3903         case e1000_media_type_unknown:
3904                 break;
3905         }
3906
3907         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
3908             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
3909                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
3910                 e_info("Gigabit has been disabled, downgrading speed\n");
3911         }
3912
3913         return link_active;
3914 }
3915
3916 static void e1000e_enable_receives(struct e1000_adapter *adapter)
3917 {
3918         /* make sure the receive unit is started */
3919         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
3920             (adapter->flags & FLAG_RX_RESTART_NOW)) {
3921                 struct e1000_hw *hw = &adapter->hw;
3922                 u32 rctl = er32(RCTL);
3923                 ew32(RCTL, rctl | E1000_RCTL_EN);
3924                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
3925         }
3926 }
3927
3928 /**
3929  * e1000_watchdog - Timer Call-back
3930  * @data: pointer to adapter cast into an unsigned long
3931  **/
3932 static void e1000_watchdog(unsigned long data)
3933 {
3934         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3935
3936         /* Do the rest outside of interrupt context */
3937         schedule_work(&adapter->watchdog_task);
3938
3939         /* TODO: make this use queue_delayed_work() */
3940 }
3941
3942 static void e1000_watchdog_task(struct work_struct *work)
3943 {
3944         struct e1000_adapter *adapter = container_of(work,
3945                                         struct e1000_adapter, watchdog_task);
3946         struct net_device *netdev = adapter->netdev;
3947         struct e1000_mac_info *mac = &adapter->hw.mac;
3948         struct e1000_phy_info *phy = &adapter->hw.phy;
3949         struct e1000_ring *tx_ring = adapter->tx_ring;
3950         struct e1000_hw *hw = &adapter->hw;
3951         u32 link, tctl;
3952         int tx_pending = 0;
3953
3954         link = e1000e_has_link(adapter);
3955         if ((netif_carrier_ok(netdev)) && link) {
3956                 /* Cancel scheduled suspend requests. */
3957                 pm_runtime_resume(netdev->dev.parent);
3958
3959                 e1000e_enable_receives(adapter);
3960                 goto link_up;
3961         }
3962
3963         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
3964             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
3965                 e1000_update_mng_vlan(adapter);
3966
3967         if (link) {
3968                 if (!netif_carrier_ok(netdev)) {
3969                         bool txb2b = 1;
3970
3971                         /* Cancel scheduled suspend requests. */
3972                         pm_runtime_resume(netdev->dev.parent);
3973
3974                         /* update snapshot of PHY registers on LSC */
3975                         e1000_phy_read_status(adapter);
3976                         mac->ops.get_link_up_info(&adapter->hw,
3977                                                    &adapter->link_speed,
3978                                                    &adapter->link_duplex);
3979                         e1000_print_link_info(adapter);
3980                         /*
3981                          * On supported PHYs, check for duplex mismatch only
3982                          * if link has autonegotiated at 10/100 half
3983                          */
3984                         if ((hw->phy.type == e1000_phy_igp_3 ||
3985                              hw->phy.type == e1000_phy_bm) &&
3986                             (hw->mac.autoneg == true) &&
3987                             (adapter->link_speed == SPEED_10 ||
3988                              adapter->link_speed == SPEED_100) &&
3989                             (adapter->link_duplex == HALF_DUPLEX)) {
3990                                 u16 autoneg_exp;
3991
3992                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
3993
3994                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
3995                                         e_info("Autonegotiated half duplex but"
3996                                                " link partner cannot autoneg. "
3997                                                " Try forcing full duplex if "
3998                                                "link gets many collisions.\n");
3999                         }
4000
4001                         /* adjust timeout factor according to speed/duplex */
4002                         adapter->tx_timeout_factor = 1;
4003                         switch (adapter->link_speed) {
4004                         case SPEED_10:
4005                                 txb2b = 0;
4006                                 adapter->tx_timeout_factor = 16;
4007                                 break;
4008                         case SPEED_100:
4009                                 txb2b = 0;
4010                                 adapter->tx_timeout_factor = 10;
4011                                 break;
4012                         }
4013
4014                         /*
4015                          * workaround: re-program speed mode bit after
4016                          * link-up event
4017                          */
4018                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4019                             !txb2b) {
4020                                 u32 tarc0;
4021                                 tarc0 = er32(TARC(0));
4022                                 tarc0 &= ~SPEED_MODE_BIT;
4023                                 ew32(TARC(0), tarc0);
4024                         }
4025
4026                         /*
4027                          * disable TSO for pcie and 10/100 speeds, to avoid
4028                          * some hardware issues
4029                          */
4030                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4031                                 switch (adapter->link_speed) {
4032                                 case SPEED_10:
4033                                 case SPEED_100:
4034                                         e_info("10/100 speed: disabling TSO\n");
4035                                         netdev->features &= ~NETIF_F_TSO;
4036                                         netdev->features &= ~NETIF_F_TSO6;
4037                                         break;
4038                                 case SPEED_1000:
4039                                         netdev->features |= NETIF_F_TSO;
4040                                         netdev->features |= NETIF_F_TSO6;
4041                                         break;
4042                                 default:
4043                                         /* oops */
4044                                         break;
4045                                 }
4046                         }
4047
4048                         /*
4049                          * enable transmits in the hardware, need to do this
4050                          * after setting TARC(0)
4051                          */
4052                         tctl = er32(TCTL);
4053                         tctl |= E1000_TCTL_EN;
4054                         ew32(TCTL, tctl);
4055
4056                         /*
4057                          * Perform any post-link-up configuration before
4058                          * reporting link up.
4059                          */
4060                         if (phy->ops.cfg_on_link_up)
4061                                 phy->ops.cfg_on_link_up(hw);
4062
4063                         netif_carrier_on(netdev);
4064
4065                         if (!test_bit(__E1000_DOWN, &adapter->state))
4066                                 mod_timer(&adapter->phy_info_timer,
4067                                           round_jiffies(jiffies + 2 * HZ));
4068                 }
4069         } else {
4070                 if (netif_carrier_ok(netdev)) {
4071                         adapter->link_speed = 0;
4072                         adapter->link_duplex = 0;
4073                         /* Link status message must follow this format */
4074                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
4075                                adapter->netdev->name);
4076                         netif_carrier_off(netdev);
4077                         if (!test_bit(__E1000_DOWN, &adapter->state))
4078                                 mod_timer(&adapter->phy_info_timer,
4079                                           round_jiffies(jiffies + 2 * HZ));
4080
4081                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
4082                                 schedule_work(&adapter->reset_task);
4083                         else
4084                                 pm_schedule_suspend(netdev->dev.parent,
4085                                                         LINK_TIMEOUT);
4086                 }
4087         }
4088
4089 link_up:
4090         e1000e_update_stats(adapter);
4091
4092         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4093         adapter->tpt_old = adapter->stats.tpt;
4094         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4095         adapter->colc_old = adapter->stats.colc;
4096
4097         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4098         adapter->gorc_old = adapter->stats.gorc;
4099         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4100         adapter->gotc_old = adapter->stats.gotc;
4101
4102         e1000e_update_adaptive(&adapter->hw);
4103
4104         if (!netif_carrier_ok(netdev)) {
4105                 tx_pending = (e1000_desc_unused(tx_ring) + 1 <
4106                                tx_ring->count);
4107                 if (tx_pending) {
4108                         /*
4109                          * We've lost link, so the controller stops DMA,
4110                          * but we've got queued Tx work that's never going
4111                          * to get done, so reset controller to flush Tx.
4112                          * (Do the reset outside of interrupt context).
4113                          */
4114                         adapter->tx_timeout_count++;
4115                         schedule_work(&adapter->reset_task);
4116                         /* return immediately since reset is imminent */
4117                         return;
4118                 }
4119         }
4120
4121         /* Simple mode for Interrupt Throttle Rate (ITR) */
4122         if (adapter->itr_setting == 4) {
4123                 /*
4124                  * Symmetric Tx/Rx gets a reduced ITR=2000;
4125                  * Total asymmetrical Tx or Rx gets ITR=8000;
4126                  * everyone else is between 2000-8000.
4127                  */
4128                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4129                 u32 dif = (adapter->gotc > adapter->gorc ?
4130                             adapter->gotc - adapter->gorc :
4131                             adapter->gorc - adapter->gotc) / 10000;
4132                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4133
4134                 ew32(ITR, 1000000000 / (itr * 256));
4135         }
4136
4137         /* Cause software interrupt to ensure Rx ring is cleaned */
4138         if (adapter->msix_entries)
4139                 ew32(ICS, adapter->rx_ring->ims_val);
4140         else
4141                 ew32(ICS, E1000_ICS_RXDMT0);
4142
4143         /* Force detection of hung controller every watchdog period */
4144         adapter->detect_tx_hung = 1;
4145
4146         /*
4147          * With 82571 controllers, LAA may be overwritten due to controller
4148          * reset from the other port. Set the appropriate LAA in RAR[0]
4149          */
4150         if (e1000e_get_laa_state_82571(hw))
4151                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
4152
4153         /* Reset the timer */
4154         if (!test_bit(__E1000_DOWN, &adapter->state))
4155                 mod_timer(&adapter->watchdog_timer,
4156                           round_jiffies(jiffies + 2 * HZ));
4157 }
4158
4159 #define E1000_TX_FLAGS_CSUM             0x00000001
4160 #define E1000_TX_FLAGS_VLAN             0x00000002
4161 #define E1000_TX_FLAGS_TSO              0x00000004
4162 #define E1000_TX_FLAGS_IPV4             0x00000008
4163 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
4164 #define E1000_TX_FLAGS_VLAN_SHIFT       16
4165
4166 static int e1000_tso(struct e1000_adapter *adapter,
4167                      struct sk_buff *skb)
4168 {
4169         struct e1000_ring *tx_ring = adapter->tx_ring;
4170         struct e1000_context_desc *context_desc;
4171         struct e1000_buffer *buffer_info;
4172         unsigned int i;
4173         u32 cmd_length = 0;
4174         u16 ipcse = 0, tucse, mss;
4175         u8 ipcss, ipcso, tucss, tucso, hdr_len;
4176         int err;
4177
4178         if (!skb_is_gso(skb))
4179                 return 0;
4180
4181         if (skb_header_cloned(skb)) {
4182                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4183                 if (err)
4184                         return err;
4185         }
4186
4187         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4188         mss = skb_shinfo(skb)->gso_size;
4189         if (skb->protocol == htons(ETH_P_IP)) {
4190                 struct iphdr *iph = ip_hdr(skb);
4191                 iph->tot_len = 0;
4192                 iph->check = 0;
4193                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
4194                                                          0, IPPROTO_TCP, 0);
4195                 cmd_length = E1000_TXD_CMD_IP;
4196                 ipcse = skb_transport_offset(skb) - 1;
4197         } else if (skb_is_gso_v6(skb)) {
4198                 ipv6_hdr(skb)->payload_len = 0;
4199                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4200                                                        &ipv6_hdr(skb)->daddr,
4201                                                        0, IPPROTO_TCP, 0);
4202                 ipcse = 0;
4203         }
4204         ipcss = skb_network_offset(skb);
4205         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
4206         tucss = skb_transport_offset(skb);
4207         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
4208         tucse = 0;
4209
4210         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
4211                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
4212
4213         i = tx_ring->next_to_use;
4214         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4215         buffer_info = &tx_ring->buffer_info[i];
4216
4217         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
4218         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
4219         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
4220         context_desc->upper_setup.tcp_fields.tucss = tucss;
4221         context_desc->upper_setup.tcp_fields.tucso = tucso;
4222         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
4223         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
4224         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
4225         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
4226
4227         buffer_info->time_stamp = jiffies;
4228         buffer_info->next_to_watch = i;
4229
4230         i++;
4231         if (i == tx_ring->count)
4232                 i = 0;
4233         tx_ring->next_to_use = i;
4234
4235         return 1;
4236 }
4237
4238 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
4239 {
4240         struct e1000_ring *tx_ring = adapter->tx_ring;
4241         struct e1000_context_desc *context_desc;
4242         struct e1000_buffer *buffer_info;
4243         unsigned int i;
4244         u8 css;
4245         u32 cmd_len = E1000_TXD_CMD_DEXT;
4246         __be16 protocol;
4247
4248         if (skb->ip_summed != CHECKSUM_PARTIAL)
4249                 return 0;
4250
4251         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
4252                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
4253         else
4254                 protocol = skb->protocol;
4255
4256         switch (protocol) {
4257         case cpu_to_be16(ETH_P_IP):
4258                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4259                         cmd_len |= E1000_TXD_CMD_TCP;
4260                 break;
4261         case cpu_to_be16(ETH_P_IPV6):
4262                 /* XXX not handling all IPV6 headers */
4263                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4264                         cmd_len |= E1000_TXD_CMD_TCP;
4265                 break;
4266         default:
4267                 if (unlikely(net_ratelimit()))
4268                         e_warn("checksum_partial proto=%x!\n",
4269                                be16_to_cpu(protocol));
4270                 break;
4271         }
4272
4273         css = skb_transport_offset(skb);
4274
4275         i = tx_ring->next_to_use;
4276         buffer_info = &tx_ring->buffer_info[i];
4277         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4278
4279         context_desc->lower_setup.ip_config = 0;
4280         context_desc->upper_setup.tcp_fields.tucss = css;
4281         context_desc->upper_setup.tcp_fields.tucso =
4282                                 css + skb->csum_offset;
4283         context_desc->upper_setup.tcp_fields.tucse = 0;
4284         context_desc->tcp_seg_setup.data = 0;
4285         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
4286
4287         buffer_info->time_stamp = jiffies;
4288         buffer_info->next_to_watch = i;
4289
4290         i++;
4291         if (i == tx_ring->count)
4292                 i = 0;
4293         tx_ring->next_to_use = i;
4294
4295         return 1;
4296 }
4297
4298 #define E1000_MAX_PER_TXD       8192
4299 #define E1000_MAX_TXD_PWR       12
4300
4301 static int e1000_tx_map(struct e1000_adapter *adapter,
4302                         struct sk_buff *skb, unsigned int first,
4303                         unsigned int max_per_txd, unsigned int nr_frags,
4304                         unsigned int mss)
4305 {
4306         struct e1000_ring *tx_ring = adapter->tx_ring;
4307         struct pci_dev *pdev = adapter->pdev;
4308         struct e1000_buffer *buffer_info;
4309         unsigned int len = skb_headlen(skb);
4310         unsigned int offset = 0, size, count = 0, i;
4311         unsigned int f, bytecount, segs;
4312
4313         i = tx_ring->next_to_use;
4314
4315         while (len) {
4316                 buffer_info = &tx_ring->buffer_info[i];
4317                 size = min(len, max_per_txd);
4318
4319                 buffer_info->length = size;
4320                 buffer_info->time_stamp = jiffies;
4321                 buffer_info->next_to_watch = i;
4322                 buffer_info->dma = dma_map_single(&pdev->dev,
4323                                                   skb->data + offset,
4324                                                   size, DMA_TO_DEVICE);
4325                 buffer_info->mapped_as_page = false;
4326                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4327                         goto dma_error;
4328
4329                 len -= size;
4330                 offset += size;
4331                 count++;
4332
4333                 if (len) {
4334                         i++;
4335                         if (i == tx_ring->count)
4336                                 i = 0;
4337                 }
4338         }
4339
4340         for (f = 0; f < nr_frags; f++) {
4341                 struct skb_frag_struct *frag;
4342
4343                 frag = &skb_shinfo(skb)->frags[f];
4344                 len = frag->size;
4345                 offset = frag->page_offset;
4346
4347                 while (len) {
4348                         i++;
4349                         if (i == tx_ring->count)
4350                                 i = 0;
4351
4352                         buffer_info = &tx_ring->buffer_info[i];
4353                         size = min(len, max_per_txd);
4354
4355                         buffer_info->length = size;
4356                         buffer_info->time_stamp = jiffies;
4357                         buffer_info->next_to_watch = i;
4358                         buffer_info->dma = dma_map_page(&pdev->dev, frag->page,
4359                                                         offset, size,
4360                                                         DMA_TO_DEVICE);
4361                         buffer_info->mapped_as_page = true;
4362                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4363                                 goto dma_error;
4364
4365                         len -= size;
4366                         offset += size;
4367                         count++;
4368                 }
4369         }
4370
4371         segs = skb_shinfo(skb)->gso_segs ?: 1;
4372         /* multiply data chunks by size of headers */
4373         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
4374
4375         tx_ring->buffer_info[i].skb = skb;
4376         tx_ring->buffer_info[i].segs = segs;
4377         tx_ring->buffer_info[i].bytecount = bytecount;
4378         tx_ring->buffer_info[first].next_to_watch = i;
4379
4380         return count;
4381
4382 dma_error:
4383         dev_err(&pdev->dev, "TX DMA map failed\n");
4384         buffer_info->dma = 0;
4385         if (count)
4386                 count--;
4387
4388         while (count--) {
4389                 if (i==0)
4390                         i += tx_ring->count;
4391                 i--;
4392                 buffer_info = &tx_ring->buffer_info[i];
4393                 e1000_put_txbuf(adapter, buffer_info);;
4394         }
4395
4396         return 0;
4397 }
4398
4399 static void e1000_tx_queue(struct e1000_adapter *adapter,
4400                            int tx_flags, int count)
4401 {
4402         struct e1000_ring *tx_ring = adapter->tx_ring;
4403         struct e1000_tx_desc *tx_desc = NULL;
4404         struct e1000_buffer *buffer_info;
4405         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
4406         unsigned int i;
4407
4408         if (tx_flags & E1000_TX_FLAGS_TSO) {
4409                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
4410                              E1000_TXD_CMD_TSE;
4411                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4412
4413                 if (tx_flags & E1000_TX_FLAGS_IPV4)
4414                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4415         }
4416
4417         if (tx_flags & E1000_TX_FLAGS_CSUM) {
4418                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4419                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4420         }
4421
4422         if (tx_flags & E1000_TX_FLAGS_VLAN) {
4423                 txd_lower |= E1000_TXD_CMD_VLE;
4424                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4425         }
4426
4427         i = tx_ring->next_to_use;
4428
4429         while (count--) {
4430                 buffer_info = &tx_ring->buffer_info[i];
4431                 tx_desc = E1000_TX_DESC(*tx_ring, i);
4432                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4433                 tx_desc->lower.data =
4434                         cpu_to_le32(txd_lower | buffer_info->length);
4435                 tx_desc->upper.data = cpu_to_le32(txd_upper);
4436
4437                 i++;
4438                 if (i == tx_ring->count)
4439                         i = 0;
4440         }
4441
4442         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4443
4444         /*
4445          * Force memory writes to complete before letting h/w
4446          * know there are new descriptors to fetch.  (Only
4447          * applicable for weak-ordered memory model archs,
4448          * such as IA-64).
4449          */
4450         wmb();
4451
4452         tx_ring->next_to_use = i;
4453         writel(i, adapter->hw.hw_addr + tx_ring->tail);
4454         /*
4455          * we need this if more than one processor can write to our tail
4456          * at a time, it synchronizes IO on IA64/Altix systems
4457          */
4458         mmiowb();
4459 }
4460
4461 #define MINIMUM_DHCP_PACKET_SIZE 282
4462 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4463                                     struct sk_buff *skb)
4464 {
4465         struct e1000_hw *hw =  &adapter->hw;
4466         u16 length, offset;
4467
4468         if (vlan_tx_tag_present(skb)) {
4469                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4470                     (adapter->hw.mng_cookie.status &
4471                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4472                         return 0;
4473         }
4474
4475         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4476                 return 0;
4477
4478         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4479                 return 0;
4480
4481         {
4482                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4483                 struct udphdr *udp;
4484
4485                 if (ip->protocol != IPPROTO_UDP)
4486                         return 0;
4487
4488                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4489                 if (ntohs(udp->dest) != 67)
4490                         return 0;
4491
4492                 offset = (u8 *)udp + 8 - skb->data;
4493                 length = skb->len - offset;
4494                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4495         }
4496
4497         return 0;
4498 }
4499
4500 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4501 {
4502         struct e1000_adapter *adapter = netdev_priv(netdev);
4503
4504         netif_stop_queue(netdev);
4505         /*
4506          * Herbert's original patch had:
4507          *  smp_mb__after_netif_stop_queue();
4508          * but since that doesn't exist yet, just open code it.
4509          */
4510         smp_mb();
4511
4512         /*
4513          * We need to check again in a case another CPU has just
4514          * made room available.
4515          */
4516         if (e1000_desc_unused(adapter->tx_ring) < size)
4517                 return -EBUSY;
4518
4519         /* A reprieve! */
4520         netif_start_queue(netdev);
4521         ++adapter->restart_queue;
4522         return 0;
4523 }
4524
4525 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4526 {
4527         struct e1000_adapter *adapter = netdev_priv(netdev);
4528
4529         if (e1000_desc_unused(adapter->tx_ring) >= size)
4530                 return 0;
4531         return __e1000_maybe_stop_tx(netdev, size);
4532 }
4533
4534 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4535 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4536                                     struct net_device *netdev)
4537 {
4538         struct e1000_adapter *adapter = netdev_priv(netdev);
4539         struct e1000_ring *tx_ring = adapter->tx_ring;
4540         unsigned int first;
4541         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4542         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4543         unsigned int tx_flags = 0;
4544         unsigned int len = skb_headlen(skb);
4545         unsigned int nr_frags;
4546         unsigned int mss;
4547         int count = 0;
4548         int tso;
4549         unsigned int f;
4550
4551         if (test_bit(__E1000_DOWN, &adapter->state)) {
4552                 dev_kfree_skb_any(skb);
4553                 return NETDEV_TX_OK;
4554         }
4555
4556         if (skb->len <= 0) {
4557                 dev_kfree_skb_any(skb);
4558                 return NETDEV_TX_OK;
4559         }
4560
4561         mss = skb_shinfo(skb)->gso_size;
4562         /*
4563          * The controller does a simple calculation to
4564          * make sure there is enough room in the FIFO before
4565          * initiating the DMA for each buffer.  The calc is:
4566          * 4 = ceil(buffer len/mss).  To make sure we don't
4567          * overrun the FIFO, adjust the max buffer len if mss
4568          * drops.
4569          */
4570         if (mss) {
4571                 u8 hdr_len;
4572                 max_per_txd = min(mss << 2, max_per_txd);
4573                 max_txd_pwr = fls(max_per_txd) - 1;
4574
4575                 /*
4576                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4577                  * points to just header, pull a few bytes of payload from
4578                  * frags into skb->data
4579                  */
4580                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4581                 /*
4582                  * we do this workaround for ES2LAN, but it is un-necessary,
4583                  * avoiding it could save a lot of cycles
4584                  */
4585                 if (skb->data_len && (hdr_len == len)) {
4586                         unsigned int pull_size;
4587
4588                         pull_size = min((unsigned int)4, skb->data_len);
4589                         if (!__pskb_pull_tail(skb, pull_size)) {
4590                                 e_err("__pskb_pull_tail failed.\n");
4591                                 dev_kfree_skb_any(skb);
4592                                 return NETDEV_TX_OK;
4593                         }
4594                         len = skb_headlen(skb);
4595                 }
4596         }
4597
4598         /* reserve a descriptor for the offload context */
4599         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4600                 count++;
4601         count++;
4602
4603         count += TXD_USE_COUNT(len, max_txd_pwr);
4604
4605         nr_frags = skb_shinfo(skb)->nr_frags;
4606         for (f = 0; f < nr_frags; f++)
4607                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size,
4608                                        max_txd_pwr);
4609
4610         if (adapter->hw.mac.tx_pkt_filtering)
4611                 e1000_transfer_dhcp_info(adapter, skb);
4612
4613         /*
4614          * need: count + 2 desc gap to keep tail from touching
4615          * head, otherwise try next time
4616          */
4617         if (e1000_maybe_stop_tx(netdev, count + 2))
4618                 return NETDEV_TX_BUSY;
4619
4620         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
4621                 tx_flags |= E1000_TX_FLAGS_VLAN;
4622                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
4623         }
4624
4625         first = tx_ring->next_to_use;
4626
4627         tso = e1000_tso(adapter, skb);
4628         if (tso < 0) {
4629                 dev_kfree_skb_any(skb);
4630                 return NETDEV_TX_OK;
4631         }
4632
4633         if (tso)
4634                 tx_flags |= E1000_TX_FLAGS_TSO;
4635         else if (e1000_tx_csum(adapter, skb))
4636                 tx_flags |= E1000_TX_FLAGS_CSUM;
4637
4638         /*
4639          * Old method was to assume IPv4 packet by default if TSO was enabled.
4640          * 82571 hardware supports TSO capabilities for IPv6 as well...
4641          * no longer assume, we must.
4642          */
4643         if (skb->protocol == htons(ETH_P_IP))
4644                 tx_flags |= E1000_TX_FLAGS_IPV4;
4645
4646         /* if count is 0 then mapping error has occured */
4647         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
4648         if (count) {
4649                 e1000_tx_queue(adapter, tx_flags, count);
4650                 /* Make sure there is space in the ring for the next send. */
4651                 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
4652
4653         } else {
4654                 dev_kfree_skb_any(skb);
4655                 tx_ring->buffer_info[first].time_stamp = 0;
4656                 tx_ring->next_to_use = first;
4657         }
4658
4659         return NETDEV_TX_OK;
4660 }
4661
4662 /**
4663  * e1000_tx_timeout - Respond to a Tx Hang
4664  * @netdev: network interface device structure
4665  **/
4666 static void e1000_tx_timeout(struct net_device *netdev)
4667 {
4668         struct e1000_adapter *adapter = netdev_priv(netdev);
4669
4670         /* Do the reset outside of interrupt context */
4671         adapter->tx_timeout_count++;
4672         schedule_work(&adapter->reset_task);
4673 }
4674
4675 static void e1000_reset_task(struct work_struct *work)
4676 {
4677         struct e1000_adapter *adapter;
4678         adapter = container_of(work, struct e1000_adapter, reset_task);
4679
4680         e1000e_dump(adapter);
4681         e_err("Reset adapter\n");
4682         e1000e_reinit_locked(adapter);
4683 }
4684
4685 /**
4686  * e1000_get_stats - Get System Network Statistics
4687  * @netdev: network interface device structure
4688  *
4689  * Returns the address of the device statistics structure.
4690  * The statistics are actually updated from the timer callback.
4691  **/
4692 static struct net_device_stats *e1000_get_stats(struct net_device *netdev)
4693 {
4694         /* only return the current stats */
4695         return &netdev->stats;
4696 }
4697
4698 /**
4699  * e1000_change_mtu - Change the Maximum Transfer Unit
4700  * @netdev: network interface device structure
4701  * @new_mtu: new value for maximum frame size
4702  *
4703  * Returns 0 on success, negative on failure
4704  **/
4705 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
4706 {
4707         struct e1000_adapter *adapter = netdev_priv(netdev);
4708         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
4709
4710         /* Jumbo frame support */
4711         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
4712             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
4713                 e_err("Jumbo Frames not supported.\n");
4714                 return -EINVAL;
4715         }
4716
4717         /* Supported frame sizes */
4718         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
4719             (max_frame > adapter->max_hw_frame_size)) {
4720                 e_err("Unsupported MTU setting\n");
4721                 return -EINVAL;
4722         }
4723
4724         /* 82573 Errata 17 */
4725         if (((adapter->hw.mac.type == e1000_82573) ||
4726              (adapter->hw.mac.type == e1000_82574)) &&
4727             (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN)) {
4728                 adapter->flags2 |= FLAG2_DISABLE_ASPM_L1;
4729                 e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L1);
4730         }
4731
4732         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4733                 msleep(1);
4734         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
4735         adapter->max_frame_size = max_frame;
4736         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
4737         netdev->mtu = new_mtu;
4738         if (netif_running(netdev))
4739                 e1000e_down(adapter);
4740
4741         /*
4742          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
4743          * means we reserve 2 more, this pushes us to allocate from the next
4744          * larger slab size.
4745          * i.e. RXBUFFER_2048 --> size-4096 slab
4746          * However with the new *_jumbo_rx* routines, jumbo receives will use
4747          * fragmented skbs
4748          */
4749
4750         if (max_frame <= 2048)
4751                 adapter->rx_buffer_len = 2048;
4752         else
4753                 adapter->rx_buffer_len = 4096;
4754
4755         /* adjust allocation if LPE protects us, and we aren't using SBP */
4756         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
4757              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
4758                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
4759                                          + ETH_FCS_LEN;
4760
4761         if (netif_running(netdev))
4762                 e1000e_up(adapter);
4763         else
4764                 e1000e_reset(adapter);
4765
4766         clear_bit(__E1000_RESETTING, &adapter->state);
4767
4768         return 0;
4769 }
4770
4771 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
4772                            int cmd)
4773 {
4774         struct e1000_adapter *adapter = netdev_priv(netdev);
4775         struct mii_ioctl_data *data = if_mii(ifr);
4776
4777         if (adapter->hw.phy.media_type != e1000_media_type_copper)
4778                 return -EOPNOTSUPP;
4779
4780         switch (cmd) {
4781         case SIOCGMIIPHY:
4782                 data->phy_id = adapter->hw.phy.addr;
4783                 break;
4784         case SIOCGMIIREG:
4785                 e1000_phy_read_status(adapter);
4786
4787                 switch (data->reg_num & 0x1F) {
4788                 case MII_BMCR:
4789                         data->val_out = adapter->phy_regs.bmcr;
4790                         break;
4791                 case MII_BMSR:
4792                         data->val_out = adapter->phy_regs.bmsr;
4793                         break;
4794                 case MII_PHYSID1:
4795                         data->val_out = (adapter->hw.phy.id >> 16);
4796                         break;
4797                 case MII_PHYSID2:
4798                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
4799                         break;
4800                 case MII_ADVERTISE:
4801                         data->val_out = adapter->phy_regs.advertise;
4802                         break;
4803                 case MII_LPA:
4804                         data->val_out = adapter->phy_regs.lpa;
4805                         break;
4806                 case MII_EXPANSION:
4807                         data->val_out = adapter->phy_regs.expansion;
4808                         break;
4809                 case MII_CTRL1000:
4810                         data->val_out = adapter->phy_regs.ctrl1000;
4811                         break;
4812                 case MII_STAT1000:
4813                         data->val_out = adapter->phy_regs.stat1000;
4814                         break;
4815                 case MII_ESTATUS:
4816                         data->val_out = adapter->phy_regs.estatus;
4817                         break;
4818                 default:
4819                         return -EIO;
4820                 }
4821                 break;
4822         case SIOCSMIIREG:
4823         default:
4824                 return -EOPNOTSUPP;
4825         }
4826         return 0;
4827 }
4828
4829 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
4830 {
4831         switch (cmd) {
4832         case SIOCGMIIPHY:
4833         case SIOCGMIIREG:
4834         case SIOCSMIIREG:
4835                 return e1000_mii_ioctl(netdev, ifr, cmd);
4836         default:
4837                 return -EOPNOTSUPP;
4838         }
4839 }
4840
4841 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
4842 {
4843         struct e1000_hw *hw = &adapter->hw;
4844         u32 i, mac_reg;
4845         u16 phy_reg;
4846         int retval = 0;
4847
4848         /* copy MAC RARs to PHY RARs */
4849         for (i = 0; i < adapter->hw.mac.rar_entry_count; i++) {
4850                 mac_reg = er32(RAL(i));
4851                 e1e_wphy(hw, BM_RAR_L(i), (u16)(mac_reg & 0xFFFF));
4852                 e1e_wphy(hw, BM_RAR_M(i), (u16)((mac_reg >> 16) & 0xFFFF));
4853                 mac_reg = er32(RAH(i));
4854                 e1e_wphy(hw, BM_RAR_H(i), (u16)(mac_reg & 0xFFFF));
4855                 e1e_wphy(hw, BM_RAR_CTRL(i), (u16)((mac_reg >> 16) & 0xFFFF));
4856         }
4857
4858         /* copy MAC MTA to PHY MTA */
4859         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
4860                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
4861                 e1e_wphy(hw, BM_MTA(i), (u16)(mac_reg & 0xFFFF));
4862                 e1e_wphy(hw, BM_MTA(i) + 1, (u16)((mac_reg >> 16) & 0xFFFF));
4863         }
4864
4865         /* configure PHY Rx Control register */
4866         e1e_rphy(&adapter->hw, BM_RCTL, &phy_reg);
4867         mac_reg = er32(RCTL);
4868         if (mac_reg & E1000_RCTL_UPE)
4869                 phy_reg |= BM_RCTL_UPE;
4870         if (mac_reg & E1000_RCTL_MPE)
4871                 phy_reg |= BM_RCTL_MPE;
4872         phy_reg &= ~(BM_RCTL_MO_MASK);
4873         if (mac_reg & E1000_RCTL_MO_3)
4874                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
4875                                 << BM_RCTL_MO_SHIFT);
4876         if (mac_reg & E1000_RCTL_BAM)
4877                 phy_reg |= BM_RCTL_BAM;
4878         if (mac_reg & E1000_RCTL_PMCF)
4879                 phy_reg |= BM_RCTL_PMCF;
4880         mac_reg = er32(CTRL);
4881         if (mac_reg & E1000_CTRL_RFCE)
4882                 phy_reg |= BM_RCTL_RFCE;
4883         e1e_wphy(&adapter->hw, BM_RCTL, phy_reg);
4884
4885         /* enable PHY wakeup in MAC register */
4886         ew32(WUFC, wufc);
4887         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
4888
4889         /* configure and enable PHY wakeup in PHY registers */
4890         e1e_wphy(&adapter->hw, BM_WUFC, wufc);
4891         e1e_wphy(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
4892
4893         /* activate PHY wakeup */
4894         retval = hw->phy.ops.acquire(hw);
4895         if (retval) {
4896                 e_err("Could not acquire PHY\n");
4897                 return retval;
4898         }
4899         e1000e_write_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4900                                  (BM_WUC_ENABLE_PAGE << IGP_PAGE_SHIFT));
4901         retval = e1000e_read_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, &phy_reg);
4902         if (retval) {
4903                 e_err("Could not read PHY page 769\n");
4904                 goto out;
4905         }
4906         phy_reg |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
4907         retval = e1000e_write_phy_reg_mdic(hw, BM_WUC_ENABLE_REG, phy_reg);
4908         if (retval)
4909                 e_err("Could not set PHY Host Wakeup bit\n");
4910 out:
4911         hw->phy.ops.release(hw);
4912
4913         return retval;
4914 }
4915
4916 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
4917                             bool runtime)
4918 {
4919         struct net_device *netdev = pci_get_drvdata(pdev);
4920         struct e1000_adapter *adapter = netdev_priv(netdev);
4921         struct e1000_hw *hw = &adapter->hw;
4922         u32 ctrl, ctrl_ext, rctl, status;
4923         /* Runtime suspend should only enable wakeup for link changes */
4924         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
4925         int retval = 0;
4926
4927         netif_device_detach(netdev);
4928
4929         if (netif_running(netdev)) {
4930                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4931                 e1000e_down(adapter);
4932                 e1000_free_irq(adapter);
4933         }
4934         e1000e_reset_interrupt_capability(adapter);
4935
4936         retval = pci_save_state(pdev);
4937         if (retval)
4938                 return retval;
4939
4940         status = er32(STATUS);
4941         if (status & E1000_STATUS_LU)
4942                 wufc &= ~E1000_WUFC_LNKC;
4943
4944         if (wufc) {
4945                 e1000_setup_rctl(adapter);
4946                 e1000_set_multi(netdev);
4947
4948                 /* turn on all-multi mode if wake on multicast is enabled */
4949                 if (wufc & E1000_WUFC_MC) {
4950                         rctl = er32(RCTL);
4951                         rctl |= E1000_RCTL_MPE;
4952                         ew32(RCTL, rctl);
4953                 }
4954
4955                 ctrl = er32(CTRL);
4956                 /* advertise wake from D3Cold */
4957                 #define E1000_CTRL_ADVD3WUC 0x00100000
4958                 /* phy power management enable */
4959                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
4960                 ctrl |= E1000_CTRL_ADVD3WUC;
4961                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
4962                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
4963                 ew32(CTRL, ctrl);
4964
4965                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
4966                     adapter->hw.phy.media_type ==
4967                     e1000_media_type_internal_serdes) {
4968                         /* keep the laser running in D3 */
4969                         ctrl_ext = er32(CTRL_EXT);
4970                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
4971                         ew32(CTRL_EXT, ctrl_ext);
4972                 }
4973
4974                 if (adapter->flags & FLAG_IS_ICH)
4975                         e1000e_disable_gig_wol_ich8lan(&adapter->hw);
4976
4977                 /* Allow time for pending master requests to run */
4978                 e1000e_disable_pcie_master(&adapter->hw);
4979
4980                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
4981                         /* enable wakeup by the PHY */
4982                         retval = e1000_init_phy_wakeup(adapter, wufc);
4983                         if (retval)
4984                                 return retval;
4985                 } else {
4986                         /* enable wakeup by the MAC */
4987                         ew32(WUFC, wufc);
4988                         ew32(WUC, E1000_WUC_PME_EN);
4989                 }
4990         } else {
4991                 ew32(WUC, 0);
4992                 ew32(WUFC, 0);
4993         }
4994
4995         *enable_wake = !!wufc;
4996
4997         /* make sure adapter isn't asleep if manageability is enabled */
4998         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
4999             (hw->mac.ops.check_mng_mode(hw)))
5000                 *enable_wake = true;
5001
5002         if (adapter->hw.phy.type == e1000_phy_igp_3)
5003                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5004
5005         /*
5006          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5007          * would have already happened in close and is redundant.
5008          */
5009         e1000_release_hw_control(adapter);
5010
5011         pci_disable_device(pdev);
5012
5013         return 0;
5014 }
5015
5016 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
5017 {
5018         if (sleep && wake) {
5019                 pci_prepare_to_sleep(pdev);
5020                 return;
5021         }
5022
5023         pci_wake_from_d3(pdev, wake);
5024         pci_set_power_state(pdev, PCI_D3hot);
5025 }
5026
5027 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
5028                                     bool wake)
5029 {
5030         struct net_device *netdev = pci_get_drvdata(pdev);
5031         struct e1000_adapter *adapter = netdev_priv(netdev);
5032
5033         /*
5034          * The pci-e switch on some quad port adapters will report a
5035          * correctable error when the MAC transitions from D0 to D3.  To
5036          * prevent this we need to mask off the correctable errors on the
5037          * downstream port of the pci-e switch.
5038          */
5039         if (adapter->flags & FLAG_IS_QUAD_PORT) {
5040                 struct pci_dev *us_dev = pdev->bus->self;
5041                 int pos = pci_find_capability(us_dev, PCI_CAP_ID_EXP);
5042                 u16 devctl;
5043
5044                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
5045                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
5046                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
5047
5048                 e1000_power_off(pdev, sleep, wake);
5049
5050                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
5051         } else {
5052                 e1000_power_off(pdev, sleep, wake);
5053         }
5054 }
5055
5056 #ifdef CONFIG_PCIEASPM
5057 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5058 {
5059         pci_disable_link_state(pdev, state);
5060 }
5061 #else
5062 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5063 {
5064         int pos;
5065         u16 reg16;
5066
5067         /*
5068          * Both device and parent should have the same ASPM setting.
5069          * Disable ASPM in downstream component first and then upstream.
5070          */
5071         pos = pci_pcie_cap(pdev);
5072         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
5073         reg16 &= ~state;
5074         pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16);
5075
5076         if (!pdev->bus->self)
5077                 return;
5078
5079         pos = pci_pcie_cap(pdev->bus->self);
5080         pci_read_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, &reg16);
5081         reg16 &= ~state;
5082         pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16);
5083 }
5084 #endif
5085 void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5086 {
5087         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
5088                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
5089                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
5090
5091         __e1000e_disable_aspm(pdev, state);
5092 }
5093
5094 #ifdef CONFIG_PM_OPS
5095 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
5096 {
5097         return !!adapter->tx_ring->buffer_info;
5098 }
5099
5100 static int __e1000_resume(struct pci_dev *pdev)
5101 {
5102         struct net_device *netdev = pci_get_drvdata(pdev);
5103         struct e1000_adapter *adapter = netdev_priv(netdev);
5104         struct e1000_hw *hw = &adapter->hw;
5105         u32 err;
5106
5107         pci_set_power_state(pdev, PCI_D0);
5108         pci_restore_state(pdev);
5109         pci_save_state(pdev);
5110         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5111                 e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1);
5112
5113         e1000e_set_interrupt_capability(adapter);
5114         if (netif_running(netdev)) {
5115                 err = e1000_request_irq(adapter);
5116                 if (err)
5117                         return err;
5118         }
5119
5120         e1000e_power_up_phy(adapter);
5121
5122         /* report the system wakeup cause from S3/S4 */
5123         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5124                 u16 phy_data;
5125
5126                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
5127                 if (phy_data) {
5128                         e_info("PHY Wakeup cause - %s\n",
5129                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
5130                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
5131                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
5132                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
5133                                 phy_data & E1000_WUS_LNKC ? "Link Status "
5134                                 " Change" : "other");
5135                 }
5136                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
5137         } else {
5138                 u32 wus = er32(WUS);
5139                 if (wus) {
5140                         e_info("MAC Wakeup cause - %s\n",
5141                                 wus & E1000_WUS_EX ? "Unicast Packet" :
5142                                 wus & E1000_WUS_MC ? "Multicast Packet" :
5143                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
5144                                 wus & E1000_WUS_MAG ? "Magic Packet" :
5145                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
5146                                 "other");
5147                 }
5148                 ew32(WUS, ~0);
5149         }
5150
5151         e1000e_reset(adapter);
5152
5153         e1000_init_manageability_pt(adapter);
5154
5155         if (netif_running(netdev))
5156                 e1000e_up(adapter);
5157
5158         netif_device_attach(netdev);
5159
5160         /*
5161          * If the controller has AMT, do not set DRV_LOAD until the interface
5162          * is up.  For all other cases, let the f/w know that the h/w is now
5163          * under the control of the driver.
5164          */
5165         if (!(adapter->flags & FLAG_HAS_AMT))
5166                 e1000_get_hw_control(adapter);
5167
5168         return 0;
5169 }
5170
5171 #ifdef CONFIG_PM_SLEEP
5172 static int e1000_suspend(struct device *dev)
5173 {
5174         struct pci_dev *pdev = to_pci_dev(dev);
5175         int retval;
5176         bool wake;
5177
5178         retval = __e1000_shutdown(pdev, &wake, false);
5179         if (!retval)
5180                 e1000_complete_shutdown(pdev, true, wake);
5181
5182         return retval;
5183 }
5184
5185 static int e1000_resume(struct device *dev)
5186 {
5187         struct pci_dev *pdev = to_pci_dev(dev);
5188         struct net_device *netdev = pci_get_drvdata(pdev);
5189         struct e1000_adapter *adapter = netdev_priv(netdev);
5190
5191         if (e1000e_pm_ready(adapter))
5192                 adapter->idle_check = true;
5193
5194         return __e1000_resume(pdev);
5195 }
5196 #endif /* CONFIG_PM_SLEEP */
5197
5198 #ifdef CONFIG_PM_RUNTIME
5199 static int e1000_runtime_suspend(struct device *dev)
5200 {
5201         struct pci_dev *pdev = to_pci_dev(dev);
5202         struct net_device *netdev = pci_get_drvdata(pdev);
5203         struct e1000_adapter *adapter = netdev_priv(netdev);
5204
5205         if (e1000e_pm_ready(adapter)) {
5206                 bool wake;
5207
5208                 __e1000_shutdown(pdev, &wake, true);
5209         }
5210
5211         return 0;
5212 }
5213
5214 static int e1000_idle(struct device *dev)
5215 {
5216         struct pci_dev *pdev = to_pci_dev(dev);
5217         struct net_device *netdev = pci_get_drvdata(pdev);
5218         struct e1000_adapter *adapter = netdev_priv(netdev);
5219
5220         if (!e1000e_pm_ready(adapter))
5221                 return 0;
5222
5223         if (adapter->idle_check) {
5224                 adapter->idle_check = false;
5225                 if (!e1000e_has_link(adapter))
5226                         pm_schedule_suspend(dev, MSEC_PER_SEC);
5227         }
5228
5229         return -EBUSY;
5230 }
5231
5232 static int e1000_runtime_resume(struct device *dev)
5233 {
5234         struct pci_dev *pdev = to_pci_dev(dev);
5235         struct net_device *netdev = pci_get_drvdata(pdev);
5236         struct e1000_adapter *adapter = netdev_priv(netdev);
5237
5238         if (!e1000e_pm_ready(adapter))
5239                 return 0;
5240
5241         adapter->idle_check = !dev->power.runtime_auto;
5242         return __e1000_resume(pdev);
5243 }
5244 #endif /* CONFIG_PM_RUNTIME */
5245 #endif /* CONFIG_PM_OPS */
5246
5247 static void e1000_shutdown(struct pci_dev *pdev)
5248 {
5249         bool wake = false;
5250
5251         __e1000_shutdown(pdev, &wake, false);
5252
5253         if (system_state == SYSTEM_POWER_OFF)
5254                 e1000_complete_shutdown(pdev, false, wake);
5255 }
5256
5257 #ifdef CONFIG_NET_POLL_CONTROLLER
5258 /*
5259  * Polling 'interrupt' - used by things like netconsole to send skbs
5260  * without having to re-enable interrupts. It's not called while
5261  * the interrupt routine is executing.
5262  */
5263 static void e1000_netpoll(struct net_device *netdev)
5264 {
5265         struct e1000_adapter *adapter = netdev_priv(netdev);
5266
5267         disable_irq(adapter->pdev->irq);
5268         e1000_intr(adapter->pdev->irq, netdev);
5269
5270         enable_irq(adapter->pdev->irq);
5271 }
5272 #endif
5273
5274 /**
5275  * e1000_io_error_detected - called when PCI error is detected
5276  * @pdev: Pointer to PCI device
5277  * @state: The current pci connection state
5278  *
5279  * This function is called after a PCI bus error affecting
5280  * this device has been detected.
5281  */
5282 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5283                                                 pci_channel_state_t state)
5284 {
5285         struct net_device *netdev = pci_get_drvdata(pdev);
5286         struct e1000_adapter *adapter = netdev_priv(netdev);
5287
5288         netif_device_detach(netdev);
5289
5290         if (state == pci_channel_io_perm_failure)
5291                 return PCI_ERS_RESULT_DISCONNECT;
5292
5293         if (netif_running(netdev))
5294                 e1000e_down(adapter);
5295         pci_disable_device(pdev);
5296
5297         /* Request a slot slot reset. */
5298         return PCI_ERS_RESULT_NEED_RESET;
5299 }
5300
5301 /**
5302  * e1000_io_slot_reset - called after the pci bus has been reset.
5303  * @pdev: Pointer to PCI device
5304  *
5305  * Restart the card from scratch, as if from a cold-boot. Implementation
5306  * resembles the first-half of the e1000_resume routine.
5307  */
5308 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5309 {
5310         struct net_device *netdev = pci_get_drvdata(pdev);
5311         struct e1000_adapter *adapter = netdev_priv(netdev);
5312         struct e1000_hw *hw = &adapter->hw;
5313         int err;
5314         pci_ers_result_t result;
5315
5316         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5317                 e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1);
5318         err = pci_enable_device_mem(pdev);
5319         if (err) {
5320                 dev_err(&pdev->dev,
5321                         "Cannot re-enable PCI device after reset.\n");
5322                 result = PCI_ERS_RESULT_DISCONNECT;
5323         } else {
5324                 pci_set_master(pdev);
5325                 pdev->state_saved = true;
5326                 pci_restore_state(pdev);
5327
5328                 pci_enable_wake(pdev, PCI_D3hot, 0);
5329                 pci_enable_wake(pdev, PCI_D3cold, 0);
5330
5331                 e1000e_reset(adapter);
5332                 ew32(WUS, ~0);
5333                 result = PCI_ERS_RESULT_RECOVERED;
5334         }
5335
5336         pci_cleanup_aer_uncorrect_error_status(pdev);
5337
5338         return result;
5339 }
5340
5341 /**
5342  * e1000_io_resume - called when traffic can start flowing again.
5343  * @pdev: Pointer to PCI device
5344  *
5345  * This callback is called when the error recovery driver tells us that
5346  * its OK to resume normal operation. Implementation resembles the
5347  * second-half of the e1000_resume routine.
5348  */
5349 static void e1000_io_resume(struct pci_dev *pdev)
5350 {
5351         struct net_device *netdev = pci_get_drvdata(pdev);
5352         struct e1000_adapter *adapter = netdev_priv(netdev);
5353
5354         e1000_init_manageability_pt(adapter);
5355
5356         if (netif_running(netdev)) {
5357                 if (e1000e_up(adapter)) {
5358                         dev_err(&pdev->dev,
5359                                 "can't bring device back up after reset\n");
5360                         return;
5361                 }
5362         }
5363
5364         netif_device_attach(netdev);
5365
5366         /*
5367          * If the controller has AMT, do not set DRV_LOAD until the interface
5368          * is up.  For all other cases, let the f/w know that the h/w is now
5369          * under the control of the driver.
5370          */
5371         if (!(adapter->flags & FLAG_HAS_AMT))
5372                 e1000_get_hw_control(adapter);
5373
5374 }
5375
5376 static void e1000_print_device_info(struct e1000_adapter *adapter)
5377 {
5378         struct e1000_hw *hw = &adapter->hw;
5379         struct net_device *netdev = adapter->netdev;
5380         u32 pba_num;
5381
5382         /* print bus type/speed/width info */
5383         e_info("(PCI Express:2.5GB/s:%s) %pM\n",
5384                /* bus width */
5385                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
5386                 "Width x1"),
5387                /* MAC address */
5388                netdev->dev_addr);
5389         e_info("Intel(R) PRO/%s Network Connection\n",
5390                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
5391         e1000e_read_pba_num(hw, &pba_num);
5392         e_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
5393                hw->mac.type, hw->phy.type, (pba_num >> 8), (pba_num & 0xff));
5394 }
5395
5396 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
5397 {
5398         struct e1000_hw *hw = &adapter->hw;
5399         int ret_val;
5400         u16 buf = 0;
5401
5402         if (hw->mac.type != e1000_82573)
5403                 return;
5404
5405         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
5406         if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
5407                 /* Deep Smart Power Down (DSPD) */
5408                 dev_warn(&adapter->pdev->dev,
5409                          "Warning: detected DSPD enabled in EEPROM\n");
5410         }
5411 }
5412
5413 static const struct net_device_ops e1000e_netdev_ops = {
5414         .ndo_open               = e1000_open,
5415         .ndo_stop               = e1000_close,
5416         .ndo_start_xmit         = e1000_xmit_frame,
5417         .ndo_get_stats          = e1000_get_stats,
5418         .ndo_set_multicast_list = e1000_set_multi,
5419         .ndo_set_mac_address    = e1000_set_mac,
5420         .ndo_change_mtu         = e1000_change_mtu,
5421         .ndo_do_ioctl           = e1000_ioctl,
5422         .ndo_tx_timeout         = e1000_tx_timeout,
5423         .ndo_validate_addr      = eth_validate_addr,
5424
5425         .ndo_vlan_rx_register   = e1000_vlan_rx_register,
5426         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
5427         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
5428 #ifdef CONFIG_NET_POLL_CONTROLLER
5429         .ndo_poll_controller    = e1000_netpoll,
5430 #endif
5431 };
5432
5433 /**
5434  * e1000_probe - Device Initialization Routine
5435  * @pdev: PCI device information struct
5436  * @ent: entry in e1000_pci_tbl
5437  *
5438  * Returns 0 on success, negative on failure
5439  *
5440  * e1000_probe initializes an adapter identified by a pci_dev structure.
5441  * The OS initialization, configuring of the adapter private structure,
5442  * and a hardware reset occur.
5443  **/
5444 static int __devinit e1000_probe(struct pci_dev *pdev,
5445                                  const struct pci_device_id *ent)
5446 {
5447         struct net_device *netdev;
5448         struct e1000_adapter *adapter;
5449         struct e1000_hw *hw;
5450         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
5451         resource_size_t mmio_start, mmio_len;
5452         resource_size_t flash_start, flash_len;
5453
5454         static int cards_found;
5455         int i, err, pci_using_dac;
5456         u16 eeprom_data = 0;
5457         u16 eeprom_apme_mask = E1000_EEPROM_APME;
5458
5459         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
5460                 e1000e_disable_aspm(pdev, PCIE_LINK_STATE_L1);
5461
5462         err = pci_enable_device_mem(pdev);
5463         if (err)
5464                 return err;
5465
5466         pci_using_dac = 0;
5467         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
5468         if (!err) {
5469                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
5470                 if (!err)
5471                         pci_using_dac = 1;
5472         } else {
5473                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5474                 if (err) {
5475                         err = dma_set_coherent_mask(&pdev->dev,
5476                                                     DMA_BIT_MASK(32));
5477                         if (err) {
5478                                 dev_err(&pdev->dev, "No usable DMA "
5479                                         "configuration, aborting\n");
5480                                 goto err_dma;
5481                         }
5482                 }
5483         }
5484
5485         err = pci_request_selected_regions_exclusive(pdev,
5486                                           pci_select_bars(pdev, IORESOURCE_MEM),
5487                                           e1000e_driver_name);
5488         if (err)
5489                 goto err_pci_reg;
5490
5491         /* AER (Advanced Error Reporting) hooks */
5492         pci_enable_pcie_error_reporting(pdev);
5493
5494         pci_set_master(pdev);
5495         /* PCI config space info */
5496         err = pci_save_state(pdev);
5497         if (err)
5498                 goto err_alloc_etherdev;
5499
5500         err = -ENOMEM;
5501         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
5502         if (!netdev)
5503                 goto err_alloc_etherdev;
5504
5505         SET_NETDEV_DEV(netdev, &pdev->dev);
5506
5507         netdev->irq = pdev->irq;
5508
5509         pci_set_drvdata(pdev, netdev);
5510         adapter = netdev_priv(netdev);
5511         hw = &adapter->hw;
5512         adapter->netdev = netdev;
5513         adapter->pdev = pdev;
5514         adapter->ei = ei;
5515         adapter->pba = ei->pba;
5516         adapter->flags = ei->flags;
5517         adapter->flags2 = ei->flags2;
5518         adapter->hw.adapter = adapter;
5519         adapter->hw.mac.type = ei->mac;
5520         adapter->max_hw_frame_size = ei->max_hw_frame_size;
5521         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
5522
5523         mmio_start = pci_resource_start(pdev, 0);
5524         mmio_len = pci_resource_len(pdev, 0);
5525
5526         err = -EIO;
5527         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
5528         if (!adapter->hw.hw_addr)
5529                 goto err_ioremap;
5530
5531         if ((adapter->flags & FLAG_HAS_FLASH) &&
5532             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
5533                 flash_start = pci_resource_start(pdev, 1);
5534                 flash_len = pci_resource_len(pdev, 1);
5535                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
5536                 if (!adapter->hw.flash_address)
5537                         goto err_flashmap;
5538         }
5539
5540         /* construct the net_device struct */
5541         netdev->netdev_ops              = &e1000e_netdev_ops;
5542         e1000e_set_ethtool_ops(netdev);
5543         netdev->watchdog_timeo          = 5 * HZ;
5544         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
5545         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
5546
5547         netdev->mem_start = mmio_start;
5548         netdev->mem_end = mmio_start + mmio_len;
5549
5550         adapter->bd_number = cards_found++;
5551
5552         e1000e_check_options(adapter);
5553
5554         /* setup adapter struct */
5555         err = e1000_sw_init(adapter);
5556         if (err)
5557                 goto err_sw_init;
5558
5559         err = -EIO;
5560
5561         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
5562         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
5563         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
5564
5565         err = ei->get_variants(adapter);
5566         if (err)
5567                 goto err_hw_init;
5568
5569         if ((adapter->flags & FLAG_IS_ICH) &&
5570             (adapter->flags & FLAG_READ_ONLY_NVM))
5571                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
5572
5573         hw->mac.ops.get_bus_info(&adapter->hw);
5574
5575         adapter->hw.phy.autoneg_wait_to_complete = 0;
5576
5577         /* Copper options */
5578         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
5579                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
5580                 adapter->hw.phy.disable_polarity_correction = 0;
5581                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
5582         }
5583
5584         if (e1000_check_reset_block(&adapter->hw))
5585                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
5586
5587         netdev->features = NETIF_F_SG |
5588                            NETIF_F_HW_CSUM |
5589                            NETIF_F_HW_VLAN_TX |
5590                            NETIF_F_HW_VLAN_RX;
5591
5592         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
5593                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
5594
5595         netdev->features |= NETIF_F_TSO;
5596         netdev->features |= NETIF_F_TSO6;
5597
5598         netdev->vlan_features |= NETIF_F_TSO;
5599         netdev->vlan_features |= NETIF_F_TSO6;
5600         netdev->vlan_features |= NETIF_F_HW_CSUM;
5601         netdev->vlan_features |= NETIF_F_SG;
5602
5603         if (pci_using_dac)
5604                 netdev->features |= NETIF_F_HIGHDMA;
5605
5606         if (e1000e_enable_mng_pass_thru(&adapter->hw))
5607                 adapter->flags |= FLAG_MNG_PT_ENABLED;
5608
5609         /*
5610          * before reading the NVM, reset the controller to
5611          * put the device in a known good starting state
5612          */
5613         adapter->hw.mac.ops.reset_hw(&adapter->hw);
5614
5615         /*
5616          * systems with ASPM and others may see the checksum fail on the first
5617          * attempt. Let's give it a few tries
5618          */
5619         for (i = 0;; i++) {
5620                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
5621                         break;
5622                 if (i == 2) {
5623                         e_err("The NVM Checksum Is Not Valid\n");
5624                         err = -EIO;
5625                         goto err_eeprom;
5626                 }
5627         }
5628
5629         e1000_eeprom_checks(adapter);
5630
5631         /* copy the MAC address */
5632         if (e1000e_read_mac_addr(&adapter->hw))
5633                 e_err("NVM Read Error while reading MAC address\n");
5634
5635         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
5636         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
5637
5638         if (!is_valid_ether_addr(netdev->perm_addr)) {
5639                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
5640                 err = -EIO;
5641                 goto err_eeprom;
5642         }
5643
5644         init_timer(&adapter->watchdog_timer);
5645         adapter->watchdog_timer.function = &e1000_watchdog;
5646         adapter->watchdog_timer.data = (unsigned long) adapter;
5647
5648         init_timer(&adapter->phy_info_timer);
5649         adapter->phy_info_timer.function = &e1000_update_phy_info;
5650         adapter->phy_info_timer.data = (unsigned long) adapter;
5651
5652         INIT_WORK(&adapter->reset_task, e1000_reset_task);
5653         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
5654         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
5655         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
5656         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
5657
5658         /* Initialize link parameters. User can change them with ethtool */
5659         adapter->hw.mac.autoneg = 1;
5660         adapter->fc_autoneg = 1;
5661         adapter->hw.fc.requested_mode = e1000_fc_default;
5662         adapter->hw.fc.current_mode = e1000_fc_default;
5663         adapter->hw.phy.autoneg_advertised = 0x2f;
5664
5665         /* ring size defaults */
5666         adapter->rx_ring->count = 256;
5667         adapter->tx_ring->count = 256;
5668
5669         /*
5670          * Initial Wake on LAN setting - If APM wake is enabled in
5671          * the EEPROM, enable the ACPI Magic Packet filter
5672          */
5673         if (adapter->flags & FLAG_APME_IN_WUC) {
5674                 /* APME bit in EEPROM is mapped to WUC.APME */
5675                 eeprom_data = er32(WUC);
5676                 eeprom_apme_mask = E1000_WUC_APME;
5677                 if (eeprom_data & E1000_WUC_PHY_WAKE)
5678                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
5679         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
5680                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
5681                     (adapter->hw.bus.func == 1))
5682                         e1000_read_nvm(&adapter->hw,
5683                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
5684                 else
5685                         e1000_read_nvm(&adapter->hw,
5686                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
5687         }
5688
5689         /* fetch WoL from EEPROM */
5690         if (eeprom_data & eeprom_apme_mask)
5691                 adapter->eeprom_wol |= E1000_WUFC_MAG;
5692
5693         /*
5694          * now that we have the eeprom settings, apply the special cases
5695          * where the eeprom may be wrong or the board simply won't support
5696          * wake on lan on a particular port
5697          */
5698         if (!(adapter->flags & FLAG_HAS_WOL))
5699                 adapter->eeprom_wol = 0;
5700
5701         /* initialize the wol settings based on the eeprom settings */
5702         adapter->wol = adapter->eeprom_wol;
5703         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
5704
5705         /* save off EEPROM version number */
5706         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
5707
5708         /* reset the hardware with the new settings */
5709         e1000e_reset(adapter);
5710
5711         /*
5712          * If the controller has AMT, do not set DRV_LOAD until the interface
5713          * is up.  For all other cases, let the f/w know that the h/w is now
5714          * under the control of the driver.
5715          */
5716         if (!(adapter->flags & FLAG_HAS_AMT))
5717                 e1000_get_hw_control(adapter);
5718
5719         strcpy(netdev->name, "eth%d");
5720         err = register_netdev(netdev);
5721         if (err)
5722                 goto err_register;
5723
5724         /* carrier off reporting is important to ethtool even BEFORE open */
5725         netif_carrier_off(netdev);
5726
5727         e1000_print_device_info(adapter);
5728
5729         if (pci_dev_run_wake(pdev)) {
5730                 pm_runtime_set_active(&pdev->dev);
5731                 pm_runtime_enable(&pdev->dev);
5732         }
5733         pm_schedule_suspend(&pdev->dev, MSEC_PER_SEC);
5734
5735         return 0;
5736
5737 err_register:
5738         if (!(adapter->flags & FLAG_HAS_AMT))
5739                 e1000_release_hw_control(adapter);
5740 err_eeprom:
5741         if (!e1000_check_reset_block(&adapter->hw))
5742                 e1000_phy_hw_reset(&adapter->hw);
5743 err_hw_init:
5744
5745         kfree(adapter->tx_ring);
5746         kfree(adapter->rx_ring);
5747 err_sw_init:
5748         if (adapter->hw.flash_address)
5749                 iounmap(adapter->hw.flash_address);
5750         e1000e_reset_interrupt_capability(adapter);
5751 err_flashmap:
5752         iounmap(adapter->hw.hw_addr);
5753 err_ioremap:
5754         free_netdev(netdev);
5755 err_alloc_etherdev:
5756         pci_release_selected_regions(pdev,
5757                                      pci_select_bars(pdev, IORESOURCE_MEM));
5758 err_pci_reg:
5759 err_dma:
5760         pci_disable_device(pdev);
5761         return err;
5762 }
5763
5764 /**
5765  * e1000_remove - Device Removal Routine
5766  * @pdev: PCI device information struct
5767  *
5768  * e1000_remove is called by the PCI subsystem to alert the driver
5769  * that it should release a PCI device.  The could be caused by a
5770  * Hot-Plug event, or because the driver is going to be removed from
5771  * memory.
5772  **/
5773 static void __devexit e1000_remove(struct pci_dev *pdev)
5774 {
5775         struct net_device *netdev = pci_get_drvdata(pdev);
5776         struct e1000_adapter *adapter = netdev_priv(netdev);
5777         bool down = test_bit(__E1000_DOWN, &adapter->state);
5778
5779         pm_runtime_get_sync(&pdev->dev);
5780
5781         /*
5782          * flush_scheduled work may reschedule our watchdog task, so
5783          * explicitly disable watchdog tasks from being rescheduled
5784          */
5785         if (!down)
5786                 set_bit(__E1000_DOWN, &adapter->state);
5787         del_timer_sync(&adapter->watchdog_timer);
5788         del_timer_sync(&adapter->phy_info_timer);
5789
5790         cancel_work_sync(&adapter->reset_task);
5791         cancel_work_sync(&adapter->watchdog_task);
5792         cancel_work_sync(&adapter->downshift_task);
5793         cancel_work_sync(&adapter->update_phy_task);
5794         cancel_work_sync(&adapter->print_hang_task);
5795         flush_scheduled_work();
5796
5797         if (!(netdev->flags & IFF_UP))
5798                 e1000_power_down_phy(adapter);
5799
5800         /* Don't lie to e1000_close() down the road. */
5801         if (!down)
5802                 clear_bit(__E1000_DOWN, &adapter->state);
5803         unregister_netdev(netdev);
5804
5805         if (pci_dev_run_wake(pdev)) {
5806                 pm_runtime_disable(&pdev->dev);
5807                 pm_runtime_set_suspended(&pdev->dev);
5808         }
5809         pm_runtime_put_noidle(&pdev->dev);
5810
5811         /*
5812          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5813          * would have already happened in close and is redundant.
5814          */
5815         e1000_release_hw_control(adapter);
5816
5817         e1000e_reset_interrupt_capability(adapter);
5818         kfree(adapter->tx_ring);
5819         kfree(adapter->rx_ring);
5820
5821         iounmap(adapter->hw.hw_addr);
5822         if (adapter->hw.flash_address)
5823                 iounmap(adapter->hw.flash_address);
5824         pci_release_selected_regions(pdev,
5825                                      pci_select_bars(pdev, IORESOURCE_MEM));
5826
5827         free_netdev(netdev);
5828
5829         /* AER disable */
5830         pci_disable_pcie_error_reporting(pdev);
5831
5832         pci_disable_device(pdev);
5833 }
5834
5835 /* PCI Error Recovery (ERS) */
5836 static struct pci_error_handlers e1000_err_handler = {
5837         .error_detected = e1000_io_error_detected,
5838         .slot_reset = e1000_io_slot_reset,
5839         .resume = e1000_io_resume,
5840 };
5841
5842 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
5843         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
5844         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
5845         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
5846         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
5847         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
5848         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
5849         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
5850         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
5851         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
5852
5853         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
5854         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
5855         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
5856         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
5857
5858         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
5859         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
5860         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
5861
5862         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
5863         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
5864         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
5865
5866         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
5867           board_80003es2lan },
5868         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
5869           board_80003es2lan },
5870         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
5871           board_80003es2lan },
5872         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
5873           board_80003es2lan },
5874
5875         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
5876         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
5877         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
5878         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
5879         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
5880         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
5881         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
5882         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
5883
5884         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
5885         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
5886         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
5887         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
5888         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
5889         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
5890         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
5891         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
5892         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
5893
5894         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
5895         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
5896         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
5897
5898         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
5899         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
5900
5901         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
5902         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
5903         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
5904         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
5905
5906         { }     /* terminate list */
5907 };
5908 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
5909
5910 #ifdef CONFIG_PM_OPS
5911 static const struct dev_pm_ops e1000_pm_ops = {
5912         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
5913         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
5914                                 e1000_runtime_resume, e1000_idle)
5915 };
5916 #endif
5917
5918 /* PCI Device API Driver */
5919 static struct pci_driver e1000_driver = {
5920         .name     = e1000e_driver_name,
5921         .id_table = e1000_pci_tbl,
5922         .probe    = e1000_probe,
5923         .remove   = __devexit_p(e1000_remove),
5924 #ifdef CONFIG_PM_OPS
5925         .driver.pm = &e1000_pm_ops,
5926 #endif
5927         .shutdown = e1000_shutdown,
5928         .err_handler = &e1000_err_handler
5929 };
5930
5931 /**
5932  * e1000_init_module - Driver Registration Routine
5933  *
5934  * e1000_init_module is the first routine called when the driver is
5935  * loaded. All it does is register with the PCI subsystem.
5936  **/
5937 static int __init e1000_init_module(void)
5938 {
5939         int ret;
5940         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
5941                 e1000e_driver_version);
5942         pr_info("Copyright (c) 1999 - 2009 Intel Corporation.\n");
5943         ret = pci_register_driver(&e1000_driver);
5944
5945         return ret;
5946 }
5947 module_init(e1000_init_module);
5948
5949 /**
5950  * e1000_exit_module - Driver Exit Cleanup Routine
5951  *
5952  * e1000_exit_module is called just before the driver is removed
5953  * from memory.
5954  **/
5955 static void __exit e1000_exit_module(void)
5956 {
5957         pci_unregister_driver(&e1000_driver);
5958 }
5959 module_exit(e1000_exit_module);
5960
5961
5962 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
5963 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
5964 MODULE_LICENSE("GPL");
5965 MODULE_VERSION(DRV_VERSION);
5966
5967 /* e1000_main.c */