drivers/net/ethernet/intel/e1000e/netdev.c

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2012 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/interrupt.h>
  40 #include <linux/tcp.h>
  41 #include <linux/ipv6.h>
  42 #include <linux/slab.h>
  43 #include <net/checksum.h>
  44 #include <net/ip6_checksum.h>
  45 #include <linux/mii.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/if_vlan.h>
  48 #include <linux/cpu.h>
  49 #include <linux/smp.h>
  50 #include <linux/pm_qos.h>
  51 #include <linux/pm_runtime.h>
  52 #include <linux/aer.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "e1000.h"
  56
  57 #define DRV_EXTRAVERSION "-k"
  58
  59 #define DRV_VERSION "2.0.0" DRV_EXTRAVERSION
  60 char e1000e_driver_name[] = "e1000e";
  61 const char e1000e_driver_version[] = DRV_VERSION;
  62
  63 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  64 static int debug = -1;
  65 module_param(debug, int, 0);
  66 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  67
  68 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
  69
  70 static const struct e1000_info *e1000_info_tbl[] = {
  71         [board_82571]           = &e1000_82571_info,
  72         [board_82572]           = &e1000_82572_info,
  73         [board_82573]           = &e1000_82573_info,
  74         [board_82574]           = &e1000_82574_info,
  75         [board_82583]           = &e1000_82583_info,
  76         [board_80003es2lan]     = &e1000_es2_info,
  77         [board_ich8lan]         = &e1000_ich8_info,
  78         [board_ich9lan]         = &e1000_ich9_info,
  79         [board_ich10lan]        = &e1000_ich10_info,
  80         [board_pchlan]          = &e1000_pch_info,
  81         [board_pch2lan]         = &e1000_pch2_info,
  82         [board_pch_lpt]         = &e1000_pch_lpt_info,
  83 };
  84
  85 struct e1000_reg_info {
  86         u32 ofs;
  87         char *name;
  88 };
  89
  90 #define E1000_RDFH      0x02410 /* Rx Data FIFO Head - RW */
  91 #define E1000_RDFT      0x02418 /* Rx Data FIFO Tail - RW */
  92 #define E1000_RDFHS     0x02420 /* Rx Data FIFO Head Saved - RW */
  93 #define E1000_RDFTS     0x02428 /* Rx Data FIFO Tail Saved - RW */
  94 #define E1000_RDFPC     0x02430 /* Rx Data FIFO Packet Count - RW */
  95
  96 #define E1000_TDFH      0x03410 /* Tx Data FIFO Head - RW */
  97 #define E1000_TDFT      0x03418 /* Tx Data FIFO Tail - RW */
  98 #define E1000_TDFHS     0x03420 /* Tx Data FIFO Head Saved - RW */
  99 #define E1000_TDFTS     0x03428 /* Tx Data FIFO Tail Saved - RW */
 100 #define E1000_TDFPC     0x03430 /* Tx Data FIFO Packet Count - RW */
 101
 102 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
 103
 104         /* General Registers */
 105         {E1000_CTRL, "CTRL"},
 106         {E1000_STATUS, "STATUS"},
 107         {E1000_CTRL_EXT, "CTRL_EXT"},
 108
 109         /* Interrupt Registers */
 110         {E1000_ICR, "ICR"},
 111
 112         /* Rx Registers */
 113         {E1000_RCTL, "RCTL"},
 114         {E1000_RDLEN(0), "RDLEN"},
 115         {E1000_RDH(0), "RDH"},
 116         {E1000_RDT(0), "RDT"},
 117         {E1000_RDTR, "RDTR"},
 118         {E1000_RXDCTL(0), "RXDCTL"},
 119         {E1000_ERT, "ERT"},
 120         {E1000_RDBAL(0), "RDBAL"},
 121         {E1000_RDBAH(0), "RDBAH"},
 122         {E1000_RDFH, "RDFH"},
 123         {E1000_RDFT, "RDFT"},
 124         {E1000_RDFHS, "RDFHS"},
 125         {E1000_RDFTS, "RDFTS"},
 126         {E1000_RDFPC, "RDFPC"},
 127
 128         /* Tx Registers */
 129         {E1000_TCTL, "TCTL"},
 130         {E1000_TDBAL(0), "TDBAL"},
 131         {E1000_TDBAH(0), "TDBAH"},
 132         {E1000_TDLEN(0), "TDLEN"},
 133         {E1000_TDH(0), "TDH"},
 134         {E1000_TDT(0), "TDT"},
 135         {E1000_TIDV, "TIDV"},
 136         {E1000_TXDCTL(0), "TXDCTL"},
 137         {E1000_TADV, "TADV"},
 138         {E1000_TARC(0), "TARC"},
 139         {E1000_TDFH, "TDFH"},
 140         {E1000_TDFT, "TDFT"},
 141         {E1000_TDFHS, "TDFHS"},
 142         {E1000_TDFTS, "TDFTS"},
 143         {E1000_TDFPC, "TDFPC"},
 144
 145         /* List Terminator */
 146         {0, NULL}
 147 };
 148
 149 /*
 150  * e1000_regdump - register printout routine
 151  */
 152 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
 153 {
 154         int n = 0;
 155         char rname[16];
 156         u32 regs[8];
 157
 158         switch (reginfo->ofs) {
 159         case E1000_RXDCTL(0):
 160                 for (n = 0; n < 2; n++)
 161                         regs[n] = __er32(hw, E1000_RXDCTL(n));
 162                 break;
 163         case E1000_TXDCTL(0):
 164                 for (n = 0; n < 2; n++)
 165                         regs[n] = __er32(hw, E1000_TXDCTL(n));
 166                 break;
 167         case E1000_TARC(0):
 168                 for (n = 0; n < 2; n++)
 169                         regs[n] = __er32(hw, E1000_TARC(n));
 170                 break;
 171         default:
 172                 pr_info("%-15s %08x\n",
 173                         reginfo->name, __er32(hw, reginfo->ofs));
 174                 return;
 175         }
 176
 177         snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
 178         pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
 179 }
 180
 181 /*
 182  * e1000e_dump - Print registers, Tx-ring and Rx-ring
 183  */
 184 static void e1000e_dump(struct e1000_adapter *adapter)
 185 {
 186         struct net_device *netdev = adapter->netdev;
 187         struct e1000_hw *hw = &adapter->hw;
 188         struct e1000_reg_info *reginfo;
 189         struct e1000_ring *tx_ring = adapter->tx_ring;
 190         struct e1000_tx_desc *tx_desc;
 191         struct my_u0 {
 192                 __le64 a;
 193                 __le64 b;
 194         } *u0;
 195         struct e1000_buffer *buffer_info;
 196         struct e1000_ring *rx_ring = adapter->rx_ring;
 197         union e1000_rx_desc_packet_split *rx_desc_ps;
 198         union e1000_rx_desc_extended *rx_desc;
 199         struct my_u1 {
 200                 __le64 a;
 201                 __le64 b;
 202                 __le64 c;
 203                 __le64 d;
 204         } *u1;
 205         u32 staterr;
 206         int i = 0;
 207
 208         if (!netif_msg_hw(adapter))
 209                 return;
 210
 211         /* Print netdevice Info */
 212         if (netdev) {
 213                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 214                 pr_info("Device Name     state            trans_start      last_rx\n");
 215                 pr_info("%-15s %016lX %016lX %016lX\n",
 216                         netdev->name, netdev->state, netdev->trans_start,
 217                         netdev->last_rx);
 218         }
 219
 220         /* Print Registers */
 221         dev_info(&adapter->pdev->dev, "Register Dump\n");
 222         pr_info(" Register Name   Value\n");
 223         for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
 224              reginfo->name; reginfo++) {
 225                 e1000_regdump(hw, reginfo);
 226         }
 227
 228         /* Print Tx Ring Summary */
 229         if (!netdev || !netif_running(netdev))
 230                 return;
 231
 232         dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
 233         pr_info("Queue [NTU] [NTC] [bi(ntc)->dma  ] leng ntw timestamp\n");
 234         buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
 235         pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
 236                 0, tx_ring->next_to_use, tx_ring->next_to_clean,
 237                 (unsigned long long)buffer_info->dma,
 238                 buffer_info->length,
 239                 buffer_info->next_to_watch,
 240                 (unsigned long long)buffer_info->time_stamp);
 241
 242         /* Print Tx Ring */
 243         if (!netif_msg_tx_done(adapter))
 244                 goto rx_ring_summary;
 245
 246         dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
 247
 248         /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
 249          *
 250          * Legacy Transmit Descriptor
 251          *   +--------------------------------------------------------------+
 252          * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |
 253          *   +--------------------------------------------------------------+
 254          * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |
 255          *   +--------------------------------------------------------------+
 256          *   63       48 47        36 35    32 31     24 23    16 15        0
 257          *
 258          * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
 259          *   63      48 47    40 39       32 31             16 15    8 7      0
 260          *   +----------------------------------------------------------------+
 261          * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |
 262          *   +----------------------------------------------------------------+
 263          * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |
 264          *   +----------------------------------------------------------------+
 265          *   63      48 47    40 39 36 35 32 31   24 23  20 19                0
 266          *
 267          * Extended Data Descriptor (DTYP=0x1)
 268          *   +----------------------------------------------------------------+
 269          * 0 |                     Buffer Address [63:0]                      |
 270          *   +----------------------------------------------------------------+
 271          * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |
 272          *   +----------------------------------------------------------------+
 273          *   63       48 47     40 39  36 35    32 31     24 23  20 19        0
 274          */
 275         pr_info("Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Legacy format\n");
 276         pr_info("Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Context format\n");
 277         pr_info("Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Data format\n");
 278         for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 279                 const char *next_desc;
 280                 tx_desc = E1000_TX_DESC(*tx_ring, i);
 281                 buffer_info = &tx_ring->buffer_info[i];
 282                 u0 = (struct my_u0 *)tx_desc;
 283                 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
 284                         next_desc = " NTC/U";
 285                 else if (i == tx_ring->next_to_use)
 286                         next_desc = " NTU";
 287                 else if (i == tx_ring->next_to_clean)
 288                         next_desc = " NTC";
 289                 else
 290                         next_desc = "";
 291                 pr_info("T%c[0x%03X]    %016llX %016llX %016llX %04X  %3X %016llX %p%s\n",
 292                         (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
 293                          ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
 294                         i,
 295                         (unsigned long long)le64_to_cpu(u0->a),
 296                         (unsigned long long)le64_to_cpu(u0->b),
 297                         (unsigned long long)buffer_info->dma,
 298                         buffer_info->length, buffer_info->next_to_watch,
 299                         (unsigned long long)buffer_info->time_stamp,
 300                         buffer_info->skb, next_desc);
 301
 302                 if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
 303                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 304                                        16, 1, phys_to_virt(buffer_info->dma),
 305                                        buffer_info->length, true);
 306         }
 307
 308         /* Print Rx Ring Summary */
 309 rx_ring_summary:
 310         dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
 311         pr_info("Queue [NTU] [NTC]\n");
 312         pr_info(" %5d %5X %5X\n",
 313                 0, rx_ring->next_to_use, rx_ring->next_to_clean);
 314
 315         /* Print Rx Ring */
 316         if (!netif_msg_rx_status(adapter))
 317                 return;
 318
 319         dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
 320         switch (adapter->rx_ps_pages) {
 321         case 1:
 322         case 2:
 323         case 3:
 324                 /* [Extended] Packet Split Receive Descriptor Format
 325                  *
 326                  *    +-----------------------------------------------------+
 327                  *  0 |                Buffer Address 0 [63:0]              |
 328                  *    +-----------------------------------------------------+
 329                  *  8 |                Buffer Address 1 [63:0]              |
 330                  *    +-----------------------------------------------------+
 331                  * 16 |                Buffer Address 2 [63:0]              |
 332                  *    +-----------------------------------------------------+
 333                  * 24 |                Buffer Address 3 [63:0]              |
 334                  *    +-----------------------------------------------------+
 335                  */
 336                 pr_info("R  [desc]      [buffer 0 63:0 ] [buffer 1 63:0 ] [buffer 2 63:0 ] [buffer 3 63:0 ] [bi->dma       ] [bi->skb] <-- Ext Pkt Split format\n");
 337                 /* [Extended] Receive Descriptor (Write-Back) Format
 338                  *
 339                  *   63       48 47    32 31     13 12    8 7    4 3        0
 340                  *   +------------------------------------------------------+
 341                  * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |
 342                  *   | Checksum | Ident  |         | Queue |      |  Type   |
 343                  *   +------------------------------------------------------+
 344                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 345                  *   +------------------------------------------------------+
 346                  *   63       48 47    32 31            20 19               0
 347                  */
 348                 pr_info("RWB[desc]      [ck ipid mrqhsh] [vl   l0 ee  es] [ l3  l2  l1 hs] [reserved      ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
 349                 for (i = 0; i < rx_ring->count; i++) {
 350                         const char *next_desc;
 351                         buffer_info = &rx_ring->buffer_info[i];
 352                         rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
 353                         u1 = (struct my_u1 *)rx_desc_ps;
 354                         staterr =
 355                             le32_to_cpu(rx_desc_ps->wb.middle.status_error);
 356
 357                         if (i == rx_ring->next_to_use)
 358                                 next_desc = " NTU";
 359                         else if (i == rx_ring->next_to_clean)
 360                                 next_desc = " NTC";
 361                         else
 362                                 next_desc = "";
 363
 364                         if (staterr & E1000_RXD_STAT_DD) {
 365                                 /* Descriptor Done */
 366                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX ---------------- %p%s\n",
 367                                         "RWB", i,
 368                                         (unsigned long long)le64_to_cpu(u1->a),
 369                                         (unsigned long long)le64_to_cpu(u1->b),
 370                                         (unsigned long long)le64_to_cpu(u1->c),
 371                                         (unsigned long long)le64_to_cpu(u1->d),
 372                                         buffer_info->skb, next_desc);
 373                         } else {
 374                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX %016llX %p%s\n",
 375                                         "R  ", i,
 376                                         (unsigned long long)le64_to_cpu(u1->a),
 377                                         (unsigned long long)le64_to_cpu(u1->b),
 378                                         (unsigned long long)le64_to_cpu(u1->c),
 379                                         (unsigned long long)le64_to_cpu(u1->d),
 380                                         (unsigned long long)buffer_info->dma,
 381                                         buffer_info->skb, next_desc);
 382
 383                                 if (netif_msg_pktdata(adapter))
 384                                         print_hex_dump(KERN_INFO, "",
 385                                                 DUMP_PREFIX_ADDRESS, 16, 1,
 386                                                 phys_to_virt(buffer_info->dma),
 387                                                 adapter->rx_ps_bsize0, true);
 388                         }
 389                 }
 390                 break;
 391         default:
 392         case 0:
 393                 /* Extended Receive Descriptor (Read) Format
 394                  *
 395                  *   +-----------------------------------------------------+
 396                  * 0 |                Buffer Address [63:0]                |
 397                  *   +-----------------------------------------------------+
 398                  * 8 |                      Reserved                       |
 399                  *   +-----------------------------------------------------+
 400                  */
 401                 pr_info("R  [desc]      [buf addr 63:0 ] [reserved 63:0 ] [bi->dma       ] [bi->skb] <-- Ext (Read) format\n");
 402                 /* Extended Receive Descriptor (Write-Back) Format
 403                  *
 404                  *   63       48 47    32 31    24 23            4 3        0
 405                  *   +------------------------------------------------------+
 406                  *   |     RSS Hash      |        |               |         |
 407                  * 0 +-------------------+  Rsvd  |   Reserved    | MRQ RSS |
 408                  *   | Packet   | IP     |        |               |  Type   |
 409                  *   | Checksum | Ident  |        |               |         |
 410                  *   +------------------------------------------------------+
 411                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 412                  *   +------------------------------------------------------+
 413                  *   63       48 47    32 31            20 19               0
 414                  */
 415                 pr_info("RWB[desc]      [cs ipid    mrq] [vt   ln xe  xs] [bi->skb] <-- Ext (Write-Back) format\n");
 416
 417                 for (i = 0; i < rx_ring->count; i++) {
 418                         const char *next_desc;
 419
 420                         buffer_info = &rx_ring->buffer_info[i];
 421                         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 422                         u1 = (struct my_u1 *)rx_desc;
 423                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 424
 425                         if (i == rx_ring->next_to_use)
 426                                 next_desc = " NTU";
 427                         else if (i == rx_ring->next_to_clean)
 428                                 next_desc = " NTC";
 429                         else
 430                                 next_desc = "";
 431
 432                         if (staterr & E1000_RXD_STAT_DD) {
 433                                 /* Descriptor Done */
 434                                 pr_info("%s[0x%03X]     %016llX %016llX ---------------- %p%s\n",
 435                                         "RWB", i,
 436                                         (unsigned long long)le64_to_cpu(u1->a),
 437                                         (unsigned long long)le64_to_cpu(u1->b),
 438                                         buffer_info->skb, next_desc);
 439                         } else {
 440                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %p%s\n",
 441                                         "R  ", i,
 442                                         (unsigned long long)le64_to_cpu(u1->a),
 443                                         (unsigned long long)le64_to_cpu(u1->b),
 444                                         (unsigned long long)buffer_info->dma,
 445                                         buffer_info->skb, next_desc);
 446
 447                                 if (netif_msg_pktdata(adapter))
 448                                         print_hex_dump(KERN_INFO, "",
 449                                                        DUMP_PREFIX_ADDRESS, 16,
 450                                                        1,
 451                                                        phys_to_virt
 452                                                        (buffer_info->dma),
 453                                                        adapter->rx_buffer_len,
 454                                                        true);
 455                         }
 456                 }
 457         }
 458 }
 459
 460 /**
 461  * e1000_desc_unused - calculate if we have unused descriptors
 462  **/
 463 static int e1000_desc_unused(struct e1000_ring *ring)
 464 {
 465         if (ring->next_to_clean > ring->next_to_use)
 466                 return ring->next_to_clean - ring->next_to_use - 1;
 467
 468         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 469 }
 470
 471 /**
 472  * e1000_receive_skb - helper function to handle Rx indications
 473  * @adapter: board private structure
 474  * @status: descriptor status field as written by hardware
 475  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 476  * @skb: pointer to sk_buff to be indicated to stack
 477  **/
 478 static void e1000_receive_skb(struct e1000_adapter *adapter,
 479                               struct net_device *netdev, struct sk_buff *skb,
 480                               u8 status, __le16 vlan)
 481 {
 482         u16 tag = le16_to_cpu(vlan);
 483         skb->protocol = eth_type_trans(skb, netdev);
 484
 485         if (status & E1000_RXD_STAT_VP)
 486                 __vlan_hwaccel_put_tag(skb, tag);
 487
 488         napi_gro_receive(&adapter->napi, skb);
 489 }
 490
 491 /**
 492  * e1000_rx_checksum - Receive Checksum Offload
 493  * @adapter: board private structure
 494  * @status_err: receive descriptor status and error fields
 495  * @csum: receive descriptor csum field
 496  * @sk_buff: socket buffer with received data
 497  **/
 498 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 499                               struct sk_buff *skb)
 500 {
 501         u16 status = (u16)status_err;
 502         u8 errors = (u8)(status_err >> 24);
 503
 504         skb_checksum_none_assert(skb);
 505
 506         /* Rx checksum disabled */
 507         if (!(adapter->netdev->features & NETIF_F_RXCSUM))
 508                 return;
 509
 510         /* Ignore Checksum bit is set */
 511         if (status & E1000_RXD_STAT_IXSM)
 512                 return;
 513
 514         /* TCP/UDP checksum error bit or IP checksum error bit is set */
 515         if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
 516                 /* let the stack verify checksum errors */
 517                 adapter->hw_csum_err++;
 518                 return;
 519         }
 520
 521         /* TCP/UDP Checksum has not been calculated */
 522         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 523                 return;
 524
 525         /* It must be a TCP or UDP packet with a valid checksum */
 526         skb->ip_summed = CHECKSUM_UNNECESSARY;
 527         adapter->hw_csum_good++;
 528 }
 529
 530 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
 531 {
 532         struct e1000_adapter *adapter = rx_ring->adapter;
 533         struct e1000_hw *hw = &adapter->hw;
 534         s32 ret_val = __ew32_prepare(hw);
 535
 536         writel(i, rx_ring->tail);
 537
 538         if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
 539                 u32 rctl = er32(RCTL);
 540                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
 541                 e_err("ME firmware caused invalid RDT - resetting\n");
 542                 schedule_work(&adapter->reset_task);
 543         }
 544 }
 545
 546 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
 547 {
 548         struct e1000_adapter *adapter = tx_ring->adapter;
 549         struct e1000_hw *hw = &adapter->hw;
 550         s32 ret_val = __ew32_prepare(hw);
 551
 552         writel(i, tx_ring->tail);
 553
 554         if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
 555                 u32 tctl = er32(TCTL);
 556                 ew32(TCTL, tctl & ~E1000_TCTL_EN);
 557                 e_err("ME firmware caused invalid TDT - resetting\n");
 558                 schedule_work(&adapter->reset_task);
 559         }
 560 }
 561
 562 /**
 563  * e1000_alloc_rx_buffers - Replace used receive buffers
 564  * @rx_ring: Rx descriptor ring
 565  **/
 566 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
 567                                    int cleaned_count, gfp_t gfp)
 568 {
 569         struct e1000_adapter *adapter = rx_ring->adapter;
 570         struct net_device *netdev = adapter->netdev;
 571         struct pci_dev *pdev = adapter->pdev;
 572         union e1000_rx_desc_extended *rx_desc;
 573         struct e1000_buffer *buffer_info;
 574         struct sk_buff *skb;
 575         unsigned int i;
 576         unsigned int bufsz = adapter->rx_buffer_len;
 577
 578         i = rx_ring->next_to_use;
 579         buffer_info = &rx_ring->buffer_info[i];
 580
 581         while (cleaned_count--) {
 582                 skb = buffer_info->skb;
 583                 if (skb) {
 584                         skb_trim(skb, 0);
 585                         goto map_skb;
 586                 }
 587
 588                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 589                 if (!skb) {
 590                         /* Better luck next round */
 591                         adapter->alloc_rx_buff_failed++;
 592                         break;
 593                 }
 594
 595                 buffer_info->skb = skb;
 596 map_skb:
 597                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 598                                                   adapter->rx_buffer_len,
 599                                                   DMA_FROM_DEVICE);
 600                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 601                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 602                         adapter->rx_dma_failed++;
 603                         break;
 604                 }
 605
 606                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 607                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 608
 609                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 610                         /*
 611                          * Force memory writes to complete before letting h/w
 612                          * know there are new descriptors to fetch.  (Only
 613                          * applicable for weak-ordered memory model archs,
 614                          * such as IA-64).
 615                          */
 616                         wmb();
 617                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 618                                 e1000e_update_rdt_wa(rx_ring, i);
 619                         else
 620                                 writel(i, rx_ring->tail);
 621                 }
 622                 i++;
 623                 if (i == rx_ring->count)
 624                         i = 0;
 625                 buffer_info = &rx_ring->buffer_info[i];
 626         }
 627
 628         rx_ring->next_to_use = i;
 629 }
 630
 631 /**
 632  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 633  * @rx_ring: Rx descriptor ring
 634  **/
 635 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
 636                                       int cleaned_count, gfp_t gfp)
 637 {
 638         struct e1000_adapter *adapter = rx_ring->adapter;
 639         struct net_device *netdev = adapter->netdev;
 640         struct pci_dev *pdev = adapter->pdev;
 641         union e1000_rx_desc_packet_split *rx_desc;
 642         struct e1000_buffer *buffer_info;
 643         struct e1000_ps_page *ps_page;
 644         struct sk_buff *skb;
 645         unsigned int i, j;
 646
 647         i = rx_ring->next_to_use;
 648         buffer_info = &rx_ring->buffer_info[i];
 649
 650         while (cleaned_count--) {
 651                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 652
 653                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 654                         ps_page = &buffer_info->ps_pages[j];
 655                         if (j >= adapter->rx_ps_pages) {
 656                                 /* all unused desc entries get hw null ptr */
 657                                 rx_desc->read.buffer_addr[j + 1] =
 658                                     ~cpu_to_le64(0);
 659                                 continue;
 660                         }
 661                         if (!ps_page->page) {
 662                                 ps_page->page = alloc_page(gfp);
 663                                 if (!ps_page->page) {
 664                                         adapter->alloc_rx_buff_failed++;
 665                                         goto no_buffers;
 666                                 }
 667                                 ps_page->dma = dma_map_page(&pdev->dev,
 668                                                             ps_page->page,
 669                                                             0, PAGE_SIZE,
 670                                                             DMA_FROM_DEVICE);
 671                                 if (dma_mapping_error(&pdev->dev,
 672                                                       ps_page->dma)) {
 673                                         dev_err(&adapter->pdev->dev,
 674                                                 "Rx DMA page map failed\n");
 675                                         adapter->rx_dma_failed++;
 676                                         goto no_buffers;
 677                                 }
 678                         }
 679                         /*
 680                          * Refresh the desc even if buffer_addrs
 681                          * didn't change because each write-back
 682                          * erases this info.
 683                          */
 684                         rx_desc->read.buffer_addr[j + 1] =
 685                             cpu_to_le64(ps_page->dma);
 686                 }
 687
 688                 skb = __netdev_alloc_skb_ip_align(netdev,
 689                                                   adapter->rx_ps_bsize0,
 690                                                   gfp);
 691
 692                 if (!skb) {
 693                         adapter->alloc_rx_buff_failed++;
 694                         break;
 695                 }
 696
 697                 buffer_info->skb = skb;
 698                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 699                                                   adapter->rx_ps_bsize0,
 700                                                   DMA_FROM_DEVICE);
 701                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 702                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 703                         adapter->rx_dma_failed++;
 704                         /* cleanup skb */
 705                         dev_kfree_skb_any(skb);
 706                         buffer_info->skb = NULL;
 707                         break;
 708                 }
 709
 710                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 711
 712                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 713                         /*
 714                          * Force memory writes to complete before letting h/w
 715                          * know there are new descriptors to fetch.  (Only
 716                          * applicable for weak-ordered memory model archs,
 717                          * such as IA-64).
 718                          */
 719                         wmb();
 720                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 721                                 e1000e_update_rdt_wa(rx_ring, i << 1);
 722                         else
 723                                 writel(i << 1, rx_ring->tail);
 724                 }
 725
 726                 i++;
 727                 if (i == rx_ring->count)
 728                         i = 0;
 729                 buffer_info = &rx_ring->buffer_info[i];
 730         }
 731
 732 no_buffers:
 733         rx_ring->next_to_use = i;
 734 }
 735
 736 /**
 737  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 738  * @rx_ring: Rx descriptor ring
 739  * @cleaned_count: number of buffers to allocate this pass
 740  **/
 741
 742 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
 743                                          int cleaned_count, gfp_t gfp)
 744 {
 745         struct e1000_adapter *adapter = rx_ring->adapter;
 746         struct net_device *netdev = adapter->netdev;
 747         struct pci_dev *pdev = adapter->pdev;
 748         union e1000_rx_desc_extended *rx_desc;
 749         struct e1000_buffer *buffer_info;
 750         struct sk_buff *skb;
 751         unsigned int i;
 752         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 753
 754         i = rx_ring->next_to_use;
 755         buffer_info = &rx_ring->buffer_info[i];
 756
 757         while (cleaned_count--) {
 758                 skb = buffer_info->skb;
 759                 if (skb) {
 760                         skb_trim(skb, 0);
 761                         goto check_page;
 762                 }
 763
 764                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 765                 if (unlikely(!skb)) {
 766                         /* Better luck next round */
 767                         adapter->alloc_rx_buff_failed++;
 768                         break;
 769                 }
 770
 771                 buffer_info->skb = skb;
 772 check_page:
 773                 /* allocate a new page if necessary */
 774                 if (!buffer_info->page) {
 775                         buffer_info->page = alloc_page(gfp);
 776                         if (unlikely(!buffer_info->page)) {
 777                                 adapter->alloc_rx_buff_failed++;
 778                                 break;
 779                         }
 780                 }
 781
 782                 if (!buffer_info->dma)
 783                         buffer_info->dma = dma_map_page(&pdev->dev,
 784                                                         buffer_info->page, 0,
 785                                                         PAGE_SIZE,
 786                                                         DMA_FROM_DEVICE);
 787
 788                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 789                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 790
 791                 if (unlikely(++i == rx_ring->count))
 792                         i = 0;
 793                 buffer_info = &rx_ring->buffer_info[i];
 794         }
 795
 796         if (likely(rx_ring->next_to_use != i)) {
 797                 rx_ring->next_to_use = i;
 798                 if (unlikely(i-- == 0))
 799                         i = (rx_ring->count - 1);
 800
 801                 /* Force memory writes to complete before letting h/w
 802                  * know there are new descriptors to fetch.  (Only
 803                  * applicable for weak-ordered memory model archs,
 804                  * such as IA-64). */
 805                 wmb();
 806                 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 807                         e1000e_update_rdt_wa(rx_ring, i);
 808                 else
 809                         writel(i, rx_ring->tail);
 810         }
 811 }
 812
 813 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
 814                                  struct sk_buff *skb)
 815 {
 816         if (netdev->features & NETIF_F_RXHASH)
 817                 skb->rxhash = le32_to_cpu(rss);
 818 }
 819
 820 /**
 821  * e1000_clean_rx_irq - Send received data up the network stack
 822  * @rx_ring: Rx descriptor ring
 823  *
 824  * the return value indicates whether actual cleaning was done, there
 825  * is no guarantee that everything was cleaned
 826  **/
 827 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
 828                                int work_to_do)
 829 {
 830         struct e1000_adapter *adapter = rx_ring->adapter;
 831         struct net_device *netdev = adapter->netdev;
 832         struct pci_dev *pdev = adapter->pdev;
 833         struct e1000_hw *hw = &adapter->hw;
 834         union e1000_rx_desc_extended *rx_desc, *next_rxd;
 835         struct e1000_buffer *buffer_info, *next_buffer;
 836         u32 length, staterr;
 837         unsigned int i;
 838         int cleaned_count = 0;
 839         bool cleaned = false;
 840         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 841
 842         i = rx_ring->next_to_clean;
 843         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 844         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 845         buffer_info = &rx_ring->buffer_info[i];
 846
 847         while (staterr & E1000_RXD_STAT_DD) {
 848                 struct sk_buff *skb;
 849
 850                 if (*work_done >= work_to_do)
 851                         break;
 852                 (*work_done)++;
 853                 rmb();  /* read descriptor and rx_buffer_info after status DD */
 854
 855                 skb = buffer_info->skb;
 856                 buffer_info->skb = NULL;
 857
 858                 prefetch(skb->data - NET_IP_ALIGN);
 859
 860                 i++;
 861                 if (i == rx_ring->count)
 862                         i = 0;
 863                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
 864                 prefetch(next_rxd);
 865
 866                 next_buffer = &rx_ring->buffer_info[i];
 867
 868                 cleaned = true;
 869                 cleaned_count++;
 870                 dma_unmap_single(&pdev->dev,
 871                                  buffer_info->dma,
 872                                  adapter->rx_buffer_len,
 873                                  DMA_FROM_DEVICE);
 874                 buffer_info->dma = 0;
 875
 876                 length = le16_to_cpu(rx_desc->wb.upper.length);
 877
 878                 /*
 879                  * !EOP means multiple descriptors were used to store a single
 880                  * packet, if that's the case we need to toss it.  In fact, we
 881                  * need to toss every packet with the EOP bit clear and the
 882                  * next frame that _does_ have the EOP bit set, as it is by
 883                  * definition only a frame fragment
 884                  */
 885                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
 886                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 887
 888                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 889                         /* All receives must fit into a single buffer */
 890                         e_dbg("Receive packet consumed multiple buffers\n");
 891                         /* recycle */
 892                         buffer_info->skb = skb;
 893                         if (staterr & E1000_RXD_STAT_EOP)
 894                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 895                         goto next_desc;
 896                 }
 897
 898                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
 899                              !(netdev->features & NETIF_F_RXALL))) {
 900                         /* recycle */
 901                         buffer_info->skb = skb;
 902                         goto next_desc;
 903                 }
 904
 905                 /* adjust length to remove Ethernet CRC */
 906                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
 907                         /* If configured to store CRC, don't subtract FCS,
 908                          * but keep the FCS bytes out of the total_rx_bytes
 909                          * counter
 910                          */
 911                         if (netdev->features & NETIF_F_RXFCS)
 912                                 total_rx_bytes -= 4;
 913                         else
 914                                 length -= 4;
 915                 }
 916
 917                 total_rx_bytes += length;
 918                 total_rx_packets++;
 919
 920                 /*
 921                  * code added for copybreak, this should improve
 922                  * performance for small packets with large amounts
 923                  * of reassembly being done in the stack
 924                  */
 925                 if (length < copybreak) {
 926                         struct sk_buff *new_skb =
 927                             netdev_alloc_skb_ip_align(netdev, length);
 928                         if (new_skb) {
 929                                 skb_copy_to_linear_data_offset(new_skb,
 930                                                                -NET_IP_ALIGN,
 931                                                                (skb->data -
 932                                                                 NET_IP_ALIGN),
 933                                                                (length +
 934                                                                 NET_IP_ALIGN));
 935                                 /* save the skb in buffer_info as good */
 936                                 buffer_info->skb = skb;
 937                                 skb = new_skb;
 938                         }
 939                         /* else just continue with the old one */
 940                 }
 941                 /* end copybreak code */
 942                 skb_put(skb, length);
 943
 944                 /* Receive Checksum Offload */
 945                 e1000_rx_checksum(adapter, staterr, skb);
 946
 947                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
 948
 949                 e1000_receive_skb(adapter, netdev, skb, staterr,
 950                                   rx_desc->wb.upper.vlan);
 951
 952 next_desc:
 953                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
 954
 955                 /* return some buffers to hardware, one at a time is too slow */
 956                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 957                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
 958                                               GFP_ATOMIC);
 959                         cleaned_count = 0;
 960                 }
 961
 962                 /* use prefetched values */
 963                 rx_desc = next_rxd;
 964                 buffer_info = next_buffer;
 965
 966                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 967         }
 968         rx_ring->next_to_clean = i;
 969
 970         cleaned_count = e1000_desc_unused(rx_ring);
 971         if (cleaned_count)
 972                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
 973
 974         adapter->total_rx_bytes += total_rx_bytes;
 975         adapter->total_rx_packets += total_rx_packets;
 976         return cleaned;
 977 }
 978
 979 static void e1000_put_txbuf(struct e1000_ring *tx_ring,
 980                             struct e1000_buffer *buffer_info)
 981 {
 982         struct e1000_adapter *adapter = tx_ring->adapter;
 983
 984         if (buffer_info->dma) {
 985                 if (buffer_info->mapped_as_page)
 986                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
 987                                        buffer_info->length, DMA_TO_DEVICE);
 988                 else
 989                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
 990                                          buffer_info->length, DMA_TO_DEVICE);
 991                 buffer_info->dma = 0;
 992         }
 993         if (buffer_info->skb) {
 994                 dev_kfree_skb_any(buffer_info->skb);
 995                 buffer_info->skb = NULL;
 996         }
 997         buffer_info->time_stamp = 0;
 998 }
 999
1000 static void e1000_print_hw_hang(struct work_struct *work)
1001 {
1002         struct e1000_adapter *adapter = container_of(work,
1003                                                      struct e1000_adapter,
1004                                                      print_hang_task);
1005         struct net_device *netdev = adapter->netdev;
1006         struct e1000_ring *tx_ring = adapter->tx_ring;
1007         unsigned int i = tx_ring->next_to_clean;
1008         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1009         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1010         struct e1000_hw *hw = &adapter->hw;
1011         u16 phy_status, phy_1000t_status, phy_ext_status;
1012         u16 pci_status;
1013
1014         if (test_bit(__E1000_DOWN, &adapter->state))
1015                 return;
1016
1017         if (!adapter->tx_hang_recheck &&
1018             (adapter->flags2 & FLAG2_DMA_BURST)) {
1019                 /*
1020                  * May be block on write-back, flush and detect again
1021                  * flush pending descriptor writebacks to memory
1022                  */
1023                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1024                 /* execute the writes immediately */
1025                 e1e_flush();
1026                 /*
1027                  * Due to rare timing issues, write to TIDV again to ensure
1028                  * the write is successful
1029                  */
1030                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1031                 /* execute the writes immediately */
1032                 e1e_flush();
1033                 adapter->tx_hang_recheck = true;
1034                 return;
1035         }
1036         /* Real hang detected */
1037         adapter->tx_hang_recheck = false;
1038         netif_stop_queue(netdev);
1039
1040         e1e_rphy(hw, PHY_STATUS, &phy_status);
1041         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
1042         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
1043
1044         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1045
1046         /* detected Hardware unit hang */
1047         e_err("Detected Hardware Unit Hang:\n"
1048               "  TDH                  <%x>\n"
1049               "  TDT                  <%x>\n"
1050               "  next_to_use          <%x>\n"
1051               "  next_to_clean        <%x>\n"
1052               "buffer_info[next_to_clean]:\n"
1053               "  time_stamp           <%lx>\n"
1054               "  next_to_watch        <%x>\n"
1055               "  jiffies              <%lx>\n"
1056               "  next_to_watch.status <%x>\n"
1057               "MAC Status             <%x>\n"
1058               "PHY Status             <%x>\n"
1059               "PHY 1000BASE-T Status  <%x>\n"
1060               "PHY Extended Status    <%x>\n"
1061               "PCI Status             <%x>\n",
1062               readl(tx_ring->head),
1063               readl(tx_ring->tail),
1064               tx_ring->next_to_use,
1065               tx_ring->next_to_clean,
1066               tx_ring->buffer_info[eop].time_stamp,
1067               eop,
1068               jiffies,
1069               eop_desc->upper.fields.status,
1070               er32(STATUS),
1071               phy_status,
1072               phy_1000t_status,
1073               phy_ext_status,
1074               pci_status);
1075
1076         /* Suggest workaround for known h/w issue */
1077         if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1078                 e_err("Try turning off Tx pause (flow control) via ethtool\n");
1079 }
1080
1081 /**
1082  * e1000_clean_tx_irq - Reclaim resources after transmit completes
1083  * @tx_ring: Tx descriptor ring
1084  *
1085  * the return value indicates whether actual cleaning was done, there
1086  * is no guarantee that everything was cleaned
1087  **/
1088 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
1089 {
1090         struct e1000_adapter *adapter = tx_ring->adapter;
1091         struct net_device *netdev = adapter->netdev;
1092         struct e1000_hw *hw = &adapter->hw;
1093         struct e1000_tx_desc *tx_desc, *eop_desc;
1094         struct e1000_buffer *buffer_info;
1095         unsigned int i, eop;
1096         unsigned int count = 0;
1097         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1098         unsigned int bytes_compl = 0, pkts_compl = 0;
1099
1100         i = tx_ring->next_to_clean;
1101         eop = tx_ring->buffer_info[i].next_to_watch;
1102         eop_desc = E1000_TX_DESC(*tx_ring, eop);
1103
1104         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1105                (count < tx_ring->count)) {
1106                 bool cleaned = false;
1107                 rmb(); /* read buffer_info after eop_desc */
1108                 for (; !cleaned; count++) {
1109                         tx_desc = E1000_TX_DESC(*tx_ring, i);
1110                         buffer_info = &tx_ring->buffer_info[i];
1111                         cleaned = (i == eop);
1112
1113                         if (cleaned) {
1114                                 total_tx_packets += buffer_info->segs;
1115                                 total_tx_bytes += buffer_info->bytecount;
1116                                 if (buffer_info->skb) {
1117                                         bytes_compl += buffer_info->skb->len;
1118                                         pkts_compl++;
1119                                 }
1120                         }
1121
1122                         e1000_put_txbuf(tx_ring, buffer_info);
1123                         tx_desc->upper.data = 0;
1124
1125                         i++;
1126                         if (i == tx_ring->count)
1127                                 i = 0;
1128                 }
1129
1130                 if (i == tx_ring->next_to_use)
1131                         break;
1132                 eop = tx_ring->buffer_info[i].next_to_watch;
1133                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1134         }
1135
1136         tx_ring->next_to_clean = i;
1137
1138         netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1139
1140 #define TX_WAKE_THRESHOLD 32
1141         if (count && netif_carrier_ok(netdev) &&
1142             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1143                 /* Make sure that anybody stopping the queue after this
1144                  * sees the new next_to_clean.
1145                  */
1146                 smp_mb();
1147
1148                 if (netif_queue_stopped(netdev) &&
1149                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1150                         netif_wake_queue(netdev);
1151                         ++adapter->restart_queue;
1152                 }
1153         }
1154
1155         if (adapter->detect_tx_hung) {
1156                 /*
1157                  * Detect a transmit hang in hardware, this serializes the
1158                  * check with the clearing of time_stamp and movement of i
1159                  */
1160                 adapter->detect_tx_hung = false;
1161                 if (tx_ring->buffer_info[i].time_stamp &&
1162                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1163                                + (adapter->tx_timeout_factor * HZ)) &&
1164                     !(er32(STATUS) & E1000_STATUS_TXOFF))
1165                         schedule_work(&adapter->print_hang_task);
1166                 else
1167                         adapter->tx_hang_recheck = false;
1168         }
1169         adapter->total_tx_bytes += total_tx_bytes;
1170         adapter->total_tx_packets += total_tx_packets;
1171         return count < tx_ring->count;
1172 }
1173
1174 /**
1175  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1176  * @rx_ring: Rx descriptor ring
1177  *
1178  * the return value indicates whether actual cleaning was done, there
1179  * is no guarantee that everything was cleaned
1180  **/
1181 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1182                                   int work_to_do)
1183 {
1184         struct e1000_adapter *adapter = rx_ring->adapter;
1185         struct e1000_hw *hw = &adapter->hw;
1186         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1187         struct net_device *netdev = adapter->netdev;
1188         struct pci_dev *pdev = adapter->pdev;
1189         struct e1000_buffer *buffer_info, *next_buffer;
1190         struct e1000_ps_page *ps_page;
1191         struct sk_buff *skb;
1192         unsigned int i, j;
1193         u32 length, staterr;
1194         int cleaned_count = 0;
1195         bool cleaned = false;
1196         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1197
1198         i = rx_ring->next_to_clean;
1199         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1200         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1201         buffer_info = &rx_ring->buffer_info[i];
1202
1203         while (staterr & E1000_RXD_STAT_DD) {
1204                 if (*work_done >= work_to_do)
1205                         break;
1206                 (*work_done)++;
1207                 skb = buffer_info->skb;
1208                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1209
1210                 /* in the packet split case this is header only */
1211                 prefetch(skb->data - NET_IP_ALIGN);
1212
1213                 i++;
1214                 if (i == rx_ring->count)
1215                         i = 0;
1216                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1217                 prefetch(next_rxd);
1218
1219                 next_buffer = &rx_ring->buffer_info[i];
1220
1221                 cleaned = true;
1222                 cleaned_count++;
1223                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1224                                  adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1225                 buffer_info->dma = 0;
1226
1227                 /* see !EOP comment in other Rx routine */
1228                 if (!(staterr & E1000_RXD_STAT_EOP))
1229                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1230
1231                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1232                         e_dbg("Packet Split buffers didn't pick up the full packet\n");
1233                         dev_kfree_skb_irq(skb);
1234                         if (staterr & E1000_RXD_STAT_EOP)
1235                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1236                         goto next_desc;
1237                 }
1238
1239                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1240                              !(netdev->features & NETIF_F_RXALL))) {
1241                         dev_kfree_skb_irq(skb);
1242                         goto next_desc;
1243                 }
1244
1245                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1246
1247                 if (!length) {
1248                         e_dbg("Last part of the packet spanning multiple descriptors\n");
1249                         dev_kfree_skb_irq(skb);
1250                         goto next_desc;
1251                 }
1252
1253                 /* Good Receive */
1254                 skb_put(skb, length);
1255
1256                 {
1257                         /*
1258                          * this looks ugly, but it seems compiler issues make
1259                          * it more efficient than reusing j
1260                          */
1261                         int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1262
1263                         /*
1264                          * page alloc/put takes too long and effects small
1265                          * packet throughput, so unsplit small packets and
1266                          * save the alloc/put only valid in softirq (napi)
1267                          * context to call kmap_*
1268                          */
1269                         if (l1 && (l1 <= copybreak) &&
1270                             ((length + l1) <= adapter->rx_ps_bsize0)) {
1271                                 u8 *vaddr;
1272
1273                                 ps_page = &buffer_info->ps_pages[0];
1274
1275                                 /*
1276                                  * there is no documentation about how to call
1277                                  * kmap_atomic, so we can't hold the mapping
1278                                  * very long
1279                                  */
1280                                 dma_sync_single_for_cpu(&pdev->dev,
1281                                                         ps_page->dma,
1282                                                         PAGE_SIZE,
1283                                                         DMA_FROM_DEVICE);
1284                                 vaddr = kmap_atomic(ps_page->page);
1285                                 memcpy(skb_tail_pointer(skb), vaddr, l1);
1286                                 kunmap_atomic(vaddr);
1287                                 dma_sync_single_for_device(&pdev->dev,
1288                                                            ps_page->dma,
1289                                                            PAGE_SIZE,
1290                                                            DMA_FROM_DEVICE);
1291
1292                                 /* remove the CRC */
1293                                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1294                                         if (!(netdev->features & NETIF_F_RXFCS))
1295                                                 l1 -= 4;
1296                                 }
1297
1298                                 skb_put(skb, l1);
1299                                 goto copydone;
1300                         } /* if */
1301                 }
1302
1303                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1304                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1305                         if (!length)
1306                                 break;
1307
1308                         ps_page = &buffer_info->ps_pages[j];
1309                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1310                                        DMA_FROM_DEVICE);
1311                         ps_page->dma = 0;
1312                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1313                         ps_page->page = NULL;
1314                         skb->len += length;
1315                         skb->data_len += length;
1316                         skb->truesize += PAGE_SIZE;
1317                 }
1318
1319                 /* strip the ethernet crc, problem is we're using pages now so
1320                  * this whole operation can get a little cpu intensive
1321                  */
1322                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1323                         if (!(netdev->features & NETIF_F_RXFCS))
1324                                 pskb_trim(skb, skb->len - 4);
1325                 }
1326
1327 copydone:
1328                 total_rx_bytes += skb->len;
1329                 total_rx_packets++;
1330
1331                 e1000_rx_checksum(adapter, staterr, skb);
1332
1333                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1334
1335                 if (rx_desc->wb.upper.header_status &
1336                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1337                         adapter->rx_hdr_split++;
1338
1339                 e1000_receive_skb(adapter, netdev, skb,
1340                                   staterr, rx_desc->wb.middle.vlan);
1341
1342 next_desc:
1343                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1344                 buffer_info->skb = NULL;
1345
1346                 /* return some buffers to hardware, one at a time is too slow */
1347                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1348                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1349                                               GFP_ATOMIC);
1350                         cleaned_count = 0;
1351                 }
1352
1353                 /* use prefetched values */
1354                 rx_desc = next_rxd;
1355                 buffer_info = next_buffer;
1356
1357                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1358         }
1359         rx_ring->next_to_clean = i;
1360
1361         cleaned_count = e1000_desc_unused(rx_ring);
1362         if (cleaned_count)
1363                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1364
1365         adapter->total_rx_bytes += total_rx_bytes;
1366         adapter->total_rx_packets += total_rx_packets;
1367         return cleaned;
1368 }
1369
1370 /**
1371  * e1000_consume_page - helper function
1372  **/
1373 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1374                                u16 length)
1375 {
1376         bi->page = NULL;
1377         skb->len += length;
1378         skb->data_len += length;
1379         skb->truesize += PAGE_SIZE;
1380 }
1381
1382 /**
1383  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1384  * @adapter: board private structure
1385  *
1386  * the return value indicates whether actual cleaning was done, there
1387  * is no guarantee that everything was cleaned
1388  **/
1389 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1390                                      int work_to_do)
1391 {
1392         struct e1000_adapter *adapter = rx_ring->adapter;
1393         struct net_device *netdev = adapter->netdev;
1394         struct pci_dev *pdev = adapter->pdev;
1395         union e1000_rx_desc_extended *rx_desc, *next_rxd;
1396         struct e1000_buffer *buffer_info, *next_buffer;
1397         u32 length, staterr;
1398         unsigned int i;
1399         int cleaned_count = 0;
1400         bool cleaned = false;
1401         unsigned int total_rx_bytes=0, total_rx_packets=0;
1402
1403         i = rx_ring->next_to_clean;
1404         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1405         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1406         buffer_info = &rx_ring->buffer_info[i];
1407
1408         while (staterr & E1000_RXD_STAT_DD) {
1409                 struct sk_buff *skb;
1410
1411                 if (*work_done >= work_to_do)
1412                         break;
1413                 (*work_done)++;
1414                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1415
1416                 skb = buffer_info->skb;
1417                 buffer_info->skb = NULL;
1418
1419                 ++i;
1420                 if (i == rx_ring->count)
1421                         i = 0;
1422                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1423                 prefetch(next_rxd);
1424
1425                 next_buffer = &rx_ring->buffer_info[i];
1426
1427                 cleaned = true;
1428                 cleaned_count++;
1429                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1430                                DMA_FROM_DEVICE);
1431                 buffer_info->dma = 0;
1432
1433                 length = le16_to_cpu(rx_desc->wb.upper.length);
1434
1435                 /* errors is only valid for DD + EOP descriptors */
1436                 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1437                              ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1438                               !(netdev->features & NETIF_F_RXALL)))) {
1439                         /* recycle both page and skb */
1440                         buffer_info->skb = skb;
1441                         /* an error means any chain goes out the window too */
1442                         if (rx_ring->rx_skb_top)
1443                                 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1444                         rx_ring->rx_skb_top = NULL;
1445                         goto next_desc;
1446                 }
1447
1448 #define rxtop (rx_ring->rx_skb_top)
1449                 if (!(staterr & E1000_RXD_STAT_EOP)) {
1450                         /* this descriptor is only the beginning (or middle) */
1451                         if (!rxtop) {
1452                                 /* this is the beginning of a chain */
1453                                 rxtop = skb;
1454                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1455                                                    0, length);
1456                         } else {
1457                                 /* this is the middle of a chain */
1458                                 skb_fill_page_desc(rxtop,
1459                                     skb_shinfo(rxtop)->nr_frags,
1460                                     buffer_info->page, 0, length);
1461                                 /* re-use the skb, only consumed the page */
1462                                 buffer_info->skb = skb;
1463                         }
1464                         e1000_consume_page(buffer_info, rxtop, length);
1465                         goto next_desc;
1466                 } else {
1467                         if (rxtop) {
1468                                 /* end of the chain */
1469                                 skb_fill_page_desc(rxtop,
1470                                     skb_shinfo(rxtop)->nr_frags,
1471                                     buffer_info->page, 0, length);
1472                                 /* re-use the current skb, we only consumed the
1473                                  * page */
1474                                 buffer_info->skb = skb;
1475                                 skb = rxtop;
1476                                 rxtop = NULL;
1477                                 e1000_consume_page(buffer_info, skb, length);
1478                         } else {
1479                                 /* no chain, got EOP, this buf is the packet
1480                                  * copybreak to save the put_page/alloc_page */
1481                                 if (length <= copybreak &&
1482                                     skb_tailroom(skb) >= length) {
1483                                         u8 *vaddr;
1484                                         vaddr = kmap_atomic(buffer_info->page);
1485                                         memcpy(skb_tail_pointer(skb), vaddr,
1486                                                length);
1487                                         kunmap_atomic(vaddr);
1488                                         /* re-use the page, so don't erase
1489                                          * buffer_info->page */
1490                                         skb_put(skb, length);
1491                                 } else {
1492                                         skb_fill_page_desc(skb, 0,
1493                                                            buffer_info->page, 0,
1494                                                            length);
1495                                         e1000_consume_page(buffer_info, skb,
1496                                                            length);
1497                                 }
1498                         }
1499                 }
1500
1501                 /* Receive Checksum Offload */
1502                 e1000_rx_checksum(adapter, staterr, skb);
1503
1504                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1505
1506                 /* probably a little skewed due to removing CRC */
1507                 total_rx_bytes += skb->len;
1508                 total_rx_packets++;
1509
1510                 /* eth type trans needs skb->data to point to something */
1511                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1512                         e_err("pskb_may_pull failed.\n");
1513                         dev_kfree_skb_irq(skb);
1514                         goto next_desc;
1515                 }
1516
1517                 e1000_receive_skb(adapter, netdev, skb, staterr,
1518                                   rx_desc->wb.upper.vlan);
1519
1520 next_desc:
1521                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1522
1523                 /* return some buffers to hardware, one at a time is too slow */
1524                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1525                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1526                                               GFP_ATOMIC);
1527                         cleaned_count = 0;
1528                 }
1529
1530                 /* use prefetched values */
1531                 rx_desc = next_rxd;
1532                 buffer_info = next_buffer;
1533
1534                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1535         }
1536         rx_ring->next_to_clean = i;
1537
1538         cleaned_count = e1000_desc_unused(rx_ring);
1539         if (cleaned_count)
1540                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1541
1542         adapter->total_rx_bytes += total_rx_bytes;
1543         adapter->total_rx_packets += total_rx_packets;
1544         return cleaned;
1545 }
1546
1547 /**
1548  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1549  * @rx_ring: Rx descriptor ring
1550  **/
1551 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
1552 {
1553         struct e1000_adapter *adapter = rx_ring->adapter;
1554         struct e1000_buffer *buffer_info;
1555         struct e1000_ps_page *ps_page;
1556         struct pci_dev *pdev = adapter->pdev;
1557         unsigned int i, j;
1558
1559         /* Free all the Rx ring sk_buffs */
1560         for (i = 0; i < rx_ring->count; i++) {
1561                 buffer_info = &rx_ring->buffer_info[i];
1562                 if (buffer_info->dma) {
1563                         if (adapter->clean_rx == e1000_clean_rx_irq)
1564                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1565                                                  adapter->rx_buffer_len,
1566                                                  DMA_FROM_DEVICE);
1567                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1568                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1569                                                PAGE_SIZE,
1570                                                DMA_FROM_DEVICE);
1571                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1572                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1573                                                  adapter->rx_ps_bsize0,
1574                                                  DMA_FROM_DEVICE);
1575                         buffer_info->dma = 0;
1576                 }
1577
1578                 if (buffer_info->page) {
1579                         put_page(buffer_info->page);
1580                         buffer_info->page = NULL;
1581                 }
1582
1583                 if (buffer_info->skb) {
1584                         dev_kfree_skb(buffer_info->skb);
1585                         buffer_info->skb = NULL;
1586                 }
1587
1588                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1589                         ps_page = &buffer_info->ps_pages[j];
1590                         if (!ps_page->page)
1591                                 break;
1592                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1593                                        DMA_FROM_DEVICE);
1594                         ps_page->dma = 0;
1595                         put_page(ps_page->page);
1596                         ps_page->page = NULL;
1597                 }
1598         }
1599
1600         /* there also may be some cached data from a chained receive */
1601         if (rx_ring->rx_skb_top) {
1602                 dev_kfree_skb(rx_ring->rx_skb_top);
1603                 rx_ring->rx_skb_top = NULL;
1604         }
1605
1606         /* Zero out the descriptor ring */
1607         memset(rx_ring->desc, 0, rx_ring->size);
1608
1609         rx_ring->next_to_clean = 0;
1610         rx_ring->next_to_use = 0;
1611         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1612
1613         writel(0, rx_ring->head);
1614         if (rx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
1615                 e1000e_update_rdt_wa(rx_ring, 0);
1616         else
1617                 writel(0, rx_ring->tail);
1618 }
1619
1620 static void e1000e_downshift_workaround(struct work_struct *work)
1621 {
1622         struct e1000_adapter *adapter = container_of(work,
1623                                         struct e1000_adapter, downshift_task);
1624
1625         if (test_bit(__E1000_DOWN, &adapter->state))
1626                 return;
1627
1628         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1629 }
1630
1631 /**
1632  * e1000_intr_msi - Interrupt Handler
1633  * @irq: interrupt number
1634  * @data: pointer to a network interface device structure
1635  **/
1636 static irqreturn_t e1000_intr_msi(int irq, void *data)
1637 {
1638         struct net_device *netdev = data;
1639         struct e1000_adapter *adapter = netdev_priv(netdev);
1640         struct e1000_hw *hw = &adapter->hw;
1641         u32 icr = er32(ICR);
1642
1643         /*
1644          * read ICR disables interrupts using IAM
1645          */
1646
1647         if (icr & E1000_ICR_LSC) {
1648                 hw->mac.get_link_status = true;
1649                 /*
1650                  * ICH8 workaround-- Call gig speed drop workaround on cable
1651                  * disconnect (LSC) before accessing any PHY registers
1652                  */
1653                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1654                     (!(er32(STATUS) & E1000_STATUS_LU)))
1655                         schedule_work(&adapter->downshift_task);
1656
1657                 /*
1658                  * 80003ES2LAN workaround-- For packet buffer work-around on
1659                  * link down event; disable receives here in the ISR and reset
1660                  * adapter in watchdog
1661                  */
1662                 if (netif_carrier_ok(netdev) &&
1663                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1664                         /* disable receives */
1665                         u32 rctl = er32(RCTL);
1666                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1667                         adapter->flags |= FLAG_RX_RESTART_NOW;
1668                 }
1669                 /* guard against interrupt when we're going down */
1670                 if (!test_bit(__E1000_DOWN, &adapter->state))
1671                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1672         }
1673
1674         if (napi_schedule_prep(&adapter->napi)) {
1675                 adapter->total_tx_bytes = 0;
1676                 adapter->total_tx_packets = 0;
1677                 adapter->total_rx_bytes = 0;
1678                 adapter->total_rx_packets = 0;
1679                 __napi_schedule(&adapter->napi);
1680         }
1681
1682         return IRQ_HANDLED;
1683 }
1684
1685 /**
1686  * e1000_intr - Interrupt Handler
1687  * @irq: interrupt number
1688  * @data: pointer to a network interface device structure
1689  **/
1690 static irqreturn_t e1000_intr(int irq, void *data)
1691 {
1692         struct net_device *netdev = data;
1693         struct e1000_adapter *adapter = netdev_priv(netdev);
1694         struct e1000_hw *hw = &adapter->hw;
1695         u32 rctl, icr = er32(ICR);
1696
1697         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1698                 return IRQ_NONE;  /* Not our interrupt */
1699
1700         /*
1701          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1702          * not set, then the adapter didn't send an interrupt
1703          */
1704         if (!(icr & E1000_ICR_INT_ASSERTED))
1705                 return IRQ_NONE;
1706
1707         /*
1708          * Interrupt Auto-Mask...upon reading ICR,
1709          * interrupts are masked.  No need for the
1710          * IMC write
1711          */
1712
1713         if (icr & E1000_ICR_LSC) {
1714                 hw->mac.get_link_status = true;
1715                 /*
1716                  * ICH8 workaround-- Call gig speed drop workaround on cable
1717                  * disconnect (LSC) before accessing any PHY registers
1718                  */
1719                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1720                     (!(er32(STATUS) & E1000_STATUS_LU)))
1721                         schedule_work(&adapter->downshift_task);
1722
1723                 /*
1724                  * 80003ES2LAN workaround--
1725                  * For packet buffer work-around on link down event;
1726                  * disable receives here in the ISR and
1727                  * reset adapter in watchdog
1728                  */
1729                 if (netif_carrier_ok(netdev) &&
1730                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1731                         /* disable receives */
1732                         rctl = er32(RCTL);
1733                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1734                         adapter->flags |= FLAG_RX_RESTART_NOW;
1735                 }
1736                 /* guard against interrupt when we're going down */
1737                 if (!test_bit(__E1000_DOWN, &adapter->state))
1738                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1739         }
1740
1741         if (napi_schedule_prep(&adapter->napi)) {
1742                 adapter->total_tx_bytes = 0;
1743                 adapter->total_tx_packets = 0;
1744                 adapter->total_rx_bytes = 0;
1745                 adapter->total_rx_packets = 0;
1746                 __napi_schedule(&adapter->napi);
1747         }
1748
1749         return IRQ_HANDLED;
1750 }
1751
1752 static irqreturn_t e1000_msix_other(int irq, void *data)
1753 {
1754         struct net_device *netdev = data;
1755         struct e1000_adapter *adapter = netdev_priv(netdev);
1756         struct e1000_hw *hw = &adapter->hw;
1757         u32 icr = er32(ICR);
1758
1759         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1760                 if (!test_bit(__E1000_DOWN, &adapter->state))
1761                         ew32(IMS, E1000_IMS_OTHER);
1762                 return IRQ_NONE;
1763         }
1764
1765         if (icr & adapter->eiac_mask)
1766                 ew32(ICS, (icr & adapter->eiac_mask));
1767
1768         if (icr & E1000_ICR_OTHER) {
1769                 if (!(icr & E1000_ICR_LSC))
1770                         goto no_link_interrupt;
1771                 hw->mac.get_link_status = true;
1772                 /* guard against interrupt when we're going down */
1773                 if (!test_bit(__E1000_DOWN, &adapter->state))
1774                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1775         }
1776
1777 no_link_interrupt:
1778         if (!test_bit(__E1000_DOWN, &adapter->state))
1779                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1780
1781         return IRQ_HANDLED;
1782 }
1783
1784
1785 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1786 {
1787         struct net_device *netdev = data;
1788         struct e1000_adapter *adapter = netdev_priv(netdev);
1789         struct e1000_hw *hw = &adapter->hw;
1790         struct e1000_ring *tx_ring = adapter->tx_ring;
1791
1792
1793         adapter->total_tx_bytes = 0;
1794         adapter->total_tx_packets = 0;
1795
1796         if (!e1000_clean_tx_irq(tx_ring))
1797                 /* Ring was not completely cleaned, so fire another interrupt */
1798                 ew32(ICS, tx_ring->ims_val);
1799
1800         return IRQ_HANDLED;
1801 }
1802
1803 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1804 {
1805         struct net_device *netdev = data;
1806         struct e1000_adapter *adapter = netdev_priv(netdev);
1807         struct e1000_ring *rx_ring = adapter->rx_ring;
1808
1809         /* Write the ITR value calculated at the end of the
1810          * previous interrupt.
1811          */
1812         if (rx_ring->set_itr) {
1813                 writel(1000000000 / (rx_ring->itr_val * 256),
1814                        rx_ring->itr_register);
1815                 rx_ring->set_itr = 0;
1816         }
1817
1818         if (napi_schedule_prep(&adapter->napi)) {
1819                 adapter->total_rx_bytes = 0;
1820                 adapter->total_rx_packets = 0;
1821                 __napi_schedule(&adapter->napi);
1822         }
1823         return IRQ_HANDLED;
1824 }
1825
1826 /**
1827  * e1000_configure_msix - Configure MSI-X hardware
1828  *
1829  * e1000_configure_msix sets up the hardware to properly
1830  * generate MSI-X interrupts.
1831  **/
1832 static void e1000_configure_msix(struct e1000_adapter *adapter)
1833 {
1834         struct e1000_hw *hw = &adapter->hw;
1835         struct e1000_ring *rx_ring = adapter->rx_ring;
1836         struct e1000_ring *tx_ring = adapter->tx_ring;
1837         int vector = 0;
1838         u32 ctrl_ext, ivar = 0;
1839
1840         adapter->eiac_mask = 0;
1841
1842         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1843         if (hw->mac.type == e1000_82574) {
1844                 u32 rfctl = er32(RFCTL);
1845                 rfctl |= E1000_RFCTL_ACK_DIS;
1846                 ew32(RFCTL, rfctl);
1847         }
1848
1849 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1850         /* Configure Rx vector */
1851         rx_ring->ims_val = E1000_IMS_RXQ0;
1852         adapter->eiac_mask |= rx_ring->ims_val;
1853         if (rx_ring->itr_val)
1854                 writel(1000000000 / (rx_ring->itr_val * 256),
1855                        rx_ring->itr_register);
1856         else
1857                 writel(1, rx_ring->itr_register);
1858         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1859
1860         /* Configure Tx vector */
1861         tx_ring->ims_val = E1000_IMS_TXQ0;
1862         vector++;
1863         if (tx_ring->itr_val)
1864                 writel(1000000000 / (tx_ring->itr_val * 256),
1865                        tx_ring->itr_register);
1866         else
1867                 writel(1, tx_ring->itr_register);
1868         adapter->eiac_mask |= tx_ring->ims_val;
1869         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1870
1871         /* set vector for Other Causes, e.g. link changes */
1872         vector++;
1873         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1874         if (rx_ring->itr_val)
1875                 writel(1000000000 / (rx_ring->itr_val * 256),
1876                        hw->hw_addr + E1000_EITR_82574(vector));
1877         else
1878                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1879
1880         /* Cause Tx interrupts on every write back */
1881         ivar |= (1 << 31);
1882
1883         ew32(IVAR, ivar);
1884
1885         /* enable MSI-X PBA support */
1886         ctrl_ext = er32(CTRL_EXT);
1887         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1888
1889         /* Auto-Mask Other interrupts upon ICR read */
1890 #define E1000_EIAC_MASK_82574   0x01F00000
1891         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1892         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1893         ew32(CTRL_EXT, ctrl_ext);
1894         e1e_flush();
1895 }
1896
1897 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1898 {
1899         if (adapter->msix_entries) {
1900                 pci_disable_msix(adapter->pdev);
1901                 kfree(adapter->msix_entries);
1902                 adapter->msix_entries = NULL;
1903         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1904                 pci_disable_msi(adapter->pdev);
1905                 adapter->flags &= ~FLAG_MSI_ENABLED;
1906         }
1907 }
1908
1909 /**
1910  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1911  *
1912  * Attempt to configure interrupts using the best available
1913  * capabilities of the hardware and kernel.
1914  **/
1915 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1916 {
1917         int err;
1918         int i;
1919
1920         switch (adapter->int_mode) {
1921         case E1000E_INT_MODE_MSIX:
1922                 if (adapter->flags & FLAG_HAS_MSIX) {
1923                         adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
1924                         adapter->msix_entries = kcalloc(adapter->num_vectors,
1925                                                       sizeof(struct msix_entry),
1926                                                       GFP_KERNEL);
1927                         if (adapter->msix_entries) {
1928                                 for (i = 0; i < adapter->num_vectors; i++)
1929                                         adapter->msix_entries[i].entry = i;
1930
1931                                 err = pci_enable_msix(adapter->pdev,
1932                                                       adapter->msix_entries,
1933                                                       adapter->num_vectors);
1934                                 if (err == 0)
1935                                         return;
1936                         }
1937                         /* MSI-X failed, so fall through and try MSI */
1938                         e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
1939                         e1000e_reset_interrupt_capability(adapter);
1940                 }
1941                 adapter->int_mode = E1000E_INT_MODE_MSI;
1942                 /* Fall through */
1943         case E1000E_INT_MODE_MSI:
1944                 if (!pci_enable_msi(adapter->pdev)) {
1945                         adapter->flags |= FLAG_MSI_ENABLED;
1946                 } else {
1947                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1948                         e_err("Failed to initialize MSI interrupts.  Falling back to legacy interrupts.\n");
1949                 }
1950                 /* Fall through */
1951         case E1000E_INT_MODE_LEGACY:
1952                 /* Don't do anything; this is the system default */
1953                 break;
1954         }
1955
1956         /* store the number of vectors being used */
1957         adapter->num_vectors = 1;
1958 }
1959
1960 /**
1961  * e1000_request_msix - Initialize MSI-X interrupts
1962  *
1963  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1964  * kernel.
1965  **/
1966 static int e1000_request_msix(struct e1000_adapter *adapter)
1967 {
1968         struct net_device *netdev = adapter->netdev;
1969         int err = 0, vector = 0;
1970
1971         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1972                 snprintf(adapter->rx_ring->name,
1973                          sizeof(adapter->rx_ring->name) - 1,
1974                          "%s-rx-0", netdev->name);
1975         else
1976                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1977         err = request_irq(adapter->msix_entries[vector].vector,
1978                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1979                           netdev);
1980         if (err)
1981                 return err;
1982         adapter->rx_ring->itr_register = adapter->hw.hw_addr +
1983             E1000_EITR_82574(vector);
1984         adapter->rx_ring->itr_val = adapter->itr;
1985         vector++;
1986
1987         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1988                 snprintf(adapter->tx_ring->name,
1989                          sizeof(adapter->tx_ring->name) - 1,
1990                          "%s-tx-0", netdev->name);
1991         else
1992                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1993         err = request_irq(adapter->msix_entries[vector].vector,
1994                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1995                           netdev);
1996         if (err)
1997                 return err;
1998         adapter->tx_ring->itr_register = adapter->hw.hw_addr +
1999             E1000_EITR_82574(vector);
2000         adapter->tx_ring->itr_val = adapter->itr;
2001         vector++;
2002
2003         err = request_irq(adapter->msix_entries[vector].vector,
2004                           e1000_msix_other, 0, netdev->name, netdev);
2005         if (err)
2006                 return err;
2007
2008         e1000_configure_msix(adapter);
2009
2010         return 0;
2011 }
2012
2013 /**
2014  * e1000_request_irq - initialize interrupts
2015  *
2016  * Attempts to configure interrupts using the best available
2017  * capabilities of the hardware and kernel.
2018  **/
2019 static int e1000_request_irq(struct e1000_adapter *adapter)
2020 {
2021         struct net_device *netdev = adapter->netdev;
2022         int err;
2023
2024         if (adapter->msix_entries) {
2025                 err = e1000_request_msix(adapter);
2026                 if (!err)
2027                         return err;
2028                 /* fall back to MSI */
2029                 e1000e_reset_interrupt_capability(adapter);
2030                 adapter->int_mode = E1000E_INT_MODE_MSI;
2031                 e1000e_set_interrupt_capability(adapter);
2032         }
2033         if (adapter->flags & FLAG_MSI_ENABLED) {
2034                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
2035                                   netdev->name, netdev);
2036                 if (!err)
2037                         return err;
2038
2039                 /* fall back to legacy interrupt */
2040                 e1000e_reset_interrupt_capability(adapter);
2041                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2042         }
2043
2044         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2045                           netdev->name, netdev);
2046         if (err)
2047                 e_err("Unable to allocate interrupt, Error: %d\n", err);
2048
2049         return err;
2050 }
2051
2052 static void e1000_free_irq(struct e1000_adapter *adapter)
2053 {
2054         struct net_device *netdev = adapter->netdev;
2055
2056         if (adapter->msix_entries) {
2057                 int vector = 0;
2058
2059                 free_irq(adapter->msix_entries[vector].vector, netdev);
2060                 vector++;
2061
2062                 free_irq(adapter->msix_entries[vector].vector, netdev);
2063                 vector++;
2064
2065                 /* Other Causes interrupt vector */
2066                 free_irq(adapter->msix_entries[vector].vector, netdev);
2067                 return;
2068         }
2069
2070         free_irq(adapter->pdev->irq, netdev);
2071 }
2072
2073 /**
2074  * e1000_irq_disable - Mask off interrupt generation on the NIC
2075  **/
2076 static void e1000_irq_disable(struct e1000_adapter *adapter)
2077 {
2078         struct e1000_hw *hw = &adapter->hw;
2079
2080         ew32(IMC, ~0);
2081         if (adapter->msix_entries)
2082                 ew32(EIAC_82574, 0);
2083         e1e_flush();
2084
2085         if (adapter->msix_entries) {
2086                 int i;
2087                 for (i = 0; i < adapter->num_vectors; i++)
2088                         synchronize_irq(adapter->msix_entries[i].vector);
2089         } else {
2090                 synchronize_irq(adapter->pdev->irq);
2091         }
2092 }
2093
2094 /**
2095  * e1000_irq_enable - Enable default interrupt generation settings
2096  **/
2097 static void e1000_irq_enable(struct e1000_adapter *adapter)
2098 {
2099         struct e1000_hw *hw = &adapter->hw;
2100
2101         if (adapter->msix_entries) {
2102                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2103                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2104         } else {
2105                 ew32(IMS, IMS_ENABLE_MASK);
2106         }
2107         e1e_flush();
2108 }
2109
2110 /**
2111  * e1000e_get_hw_control - get control of the h/w from f/w
2112  * @adapter: address of board private structure
2113  *
2114  * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2115  * For ASF and Pass Through versions of f/w this means that
2116  * the driver is loaded. For AMT version (only with 82573)
2117  * of the f/w this means that the network i/f is open.
2118  **/
2119 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2120 {
2121         struct e1000_hw *hw = &adapter->hw;
2122         u32 ctrl_ext;
2123         u32 swsm;
2124
2125         /* Let firmware know the driver has taken over */
2126         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2127                 swsm = er32(SWSM);
2128                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2129         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2130                 ctrl_ext = er32(CTRL_EXT);
2131                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2132         }
2133 }
2134
2135 /**
2136  * e1000e_release_hw_control - release control of the h/w to f/w
2137  * @adapter: address of board private structure
2138  *
2139  * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2140  * For ASF and Pass Through versions of f/w this means that the
2141  * driver is no longer loaded. For AMT version (only with 82573) i
2142  * of the f/w this means that the network i/f is closed.
2143  *
2144  **/
2145 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2146 {
2147         struct e1000_hw *hw = &adapter->hw;
2148         u32 ctrl_ext;
2149         u32 swsm;
2150
2151         /* Let firmware taken over control of h/w */
2152         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2153                 swsm = er32(SWSM);
2154                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2155         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2156                 ctrl_ext = er32(CTRL_EXT);
2157                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2158         }
2159 }
2160
2161 /**
2162  * @e1000_alloc_ring - allocate memory for a ring structure
2163  **/
2164 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2165                                 struct e1000_ring *ring)
2166 {
2167         struct pci_dev *pdev = adapter->pdev;
2168
2169         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2170                                         GFP_KERNEL);
2171         if (!ring->desc)
2172                 return -ENOMEM;
2173
2174         return 0;
2175 }
2176
2177 /**
2178  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2179  * @tx_ring: Tx descriptor ring
2180  *
2181  * Return 0 on success, negative on failure
2182  **/
2183 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
2184 {
2185         struct e1000_adapter *adapter = tx_ring->adapter;
2186         int err = -ENOMEM, size;
2187
2188         size = sizeof(struct e1000_buffer) * tx_ring->count;
2189         tx_ring->buffer_info = vzalloc(size);
2190         if (!tx_ring->buffer_info)
2191                 goto err;
2192
2193         /* round up to nearest 4K */
2194         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2195         tx_ring->size = ALIGN(tx_ring->size, 4096);
2196
2197         err = e1000_alloc_ring_dma(adapter, tx_ring);
2198         if (err)
2199                 goto err;
2200
2201         tx_ring->next_to_use = 0;
2202         tx_ring->next_to_clean = 0;
2203
2204         return 0;
2205 err:
2206         vfree(tx_ring->buffer_info);
2207         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2208         return err;
2209 }
2210
2211 /**
2212  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2213  * @rx_ring: Rx descriptor ring
2214  *
2215  * Returns 0 on success, negative on failure
2216  **/
2217 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
2218 {
2219         struct e1000_adapter *adapter = rx_ring->adapter;
2220         struct e1000_buffer *buffer_info;
2221         int i, size, desc_len, err = -ENOMEM;
2222
2223         size = sizeof(struct e1000_buffer) * rx_ring->count;
2224         rx_ring->buffer_info = vzalloc(size);
2225         if (!rx_ring->buffer_info)
2226                 goto err;
2227
2228         for (i = 0; i < rx_ring->count; i++) {
2229                 buffer_info = &rx_ring->buffer_info[i];
2230                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2231                                                 sizeof(struct e1000_ps_page),
2232                                                 GFP_KERNEL);
2233                 if (!buffer_info->ps_pages)
2234                         goto err_pages;
2235         }
2236
2237         desc_len = sizeof(union e1000_rx_desc_packet_split);
2238
2239         /* Round up to nearest 4K */
2240         rx_ring->size = rx_ring->count * desc_len;
2241         rx_ring->size = ALIGN(rx_ring->size, 4096);
2242
2243         err = e1000_alloc_ring_dma(adapter, rx_ring);
2244         if (err)
2245                 goto err_pages;
2246
2247         rx_ring->next_to_clean = 0;
2248         rx_ring->next_to_use = 0;
2249         rx_ring->rx_skb_top = NULL;
2250
2251         return 0;
2252
2253 err_pages:
2254         for (i = 0; i < rx_ring->count; i++) {
2255                 buffer_info = &rx_ring->buffer_info[i];
2256                 kfree(buffer_info->ps_pages);
2257         }
2258 err:
2259         vfree(rx_ring->buffer_info);
2260         e_err("Unable to allocate memory for the receive descriptor ring\n");
2261         return err;
2262 }
2263
2264 /**
2265  * e1000_clean_tx_ring - Free Tx Buffers
2266  * @tx_ring: Tx descriptor ring
2267  **/
2268 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
2269 {
2270         struct e1000_adapter *adapter = tx_ring->adapter;
2271         struct e1000_buffer *buffer_info;
2272         unsigned long size;
2273         unsigned int i;
2274
2275         for (i = 0; i < tx_ring->count; i++) {
2276                 buffer_info = &tx_ring->buffer_info[i];
2277                 e1000_put_txbuf(tx_ring, buffer_info);
2278         }
2279
2280         netdev_reset_queue(adapter->netdev);
2281         size = sizeof(struct e1000_buffer) * tx_ring->count;
2282         memset(tx_ring->buffer_info, 0, size);
2283
2284         memset(tx_ring->desc, 0, tx_ring->size);
2285
2286         tx_ring->next_to_use = 0;
2287         tx_ring->next_to_clean = 0;
2288
2289         writel(0, tx_ring->head);
2290         if (tx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
2291                 e1000e_update_tdt_wa(tx_ring, 0);
2292         else
2293                 writel(0, tx_ring->tail);
2294 }
2295
2296 /**
2297  * e1000e_free_tx_resources - Free Tx Resources per Queue
2298  * @tx_ring: Tx descriptor ring
2299  *
2300  * Free all transmit software resources
2301  **/
2302 void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
2303 {
2304         struct e1000_adapter *adapter = tx_ring->adapter;
2305         struct pci_dev *pdev = adapter->pdev;
2306
2307         e1000_clean_tx_ring(tx_ring);
2308
2309         vfree(tx_ring->buffer_info);
2310         tx_ring->buffer_info = NULL;
2311
2312         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2313                           tx_ring->dma);
2314         tx_ring->desc = NULL;
2315 }
2316
2317 /**
2318  * e1000e_free_rx_resources - Free Rx Resources
2319  * @rx_ring: Rx descriptor ring
2320  *
2321  * Free all receive software resources
2322  **/
2323 void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
2324 {
2325         struct e1000_adapter *adapter = rx_ring->adapter;
2326         struct pci_dev *pdev = adapter->pdev;
2327         int i;
2328
2329         e1000_clean_rx_ring(rx_ring);
2330
2331         for (i = 0; i < rx_ring->count; i++)
2332                 kfree(rx_ring->buffer_info[i].ps_pages);
2333
2334         vfree(rx_ring->buffer_info);
2335         rx_ring->buffer_info = NULL;
2336
2337         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2338                           rx_ring->dma);
2339         rx_ring->desc = NULL;
2340 }
2341
2342 /**
2343  * e1000_update_itr - update the dynamic ITR value based on statistics
2344  * @adapter: pointer to adapter
2345  * @itr_setting: current adapter->itr
2346  * @packets: the number of packets during this measurement interval
2347  * @bytes: the number of bytes during this measurement interval
2348  *
2349  *      Stores a new ITR value based on packets and byte
2350  *      counts during the last interrupt.  The advantage of per interrupt
2351  *      computation is faster updates and more accurate ITR for the current
2352  *      traffic pattern.  Constants in this function were computed
2353  *      based on theoretical maximum wire speed and thresholds were set based
2354  *      on testing data as well as attempting to minimize response time
2355  *      while increasing bulk throughput.  This functionality is controlled
2356  *      by the InterruptThrottleRate module parameter.
2357  **/
2358 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2359                                      u16 itr_setting, int packets,
2360                                      int bytes)
2361 {
2362         unsigned int retval = itr_setting;
2363
2364         if (packets == 0)
2365                 return itr_setting;
2366
2367         switch (itr_setting) {
2368         case lowest_latency:
2369                 /* handle TSO and jumbo frames */
2370                 if (bytes/packets > 8000)
2371                         retval = bulk_latency;
2372                 else if ((packets < 5) && (bytes > 512))
2373                         retval = low_latency;
2374                 break;
2375         case low_latency:  /* 50 usec aka 20000 ints/s */
2376                 if (bytes > 10000) {
2377                         /* this if handles the TSO accounting */
2378                         if (bytes/packets > 8000)
2379                                 retval = bulk_latency;
2380                         else if ((packets < 10) || ((bytes/packets) > 1200))
2381                                 retval = bulk_latency;
2382                         else if ((packets > 35))
2383                                 retval = lowest_latency;
2384                 } else if (bytes/packets > 2000) {
2385                         retval = bulk_latency;
2386                 } else if (packets <= 2 && bytes < 512) {
2387                         retval = lowest_latency;
2388                 }
2389                 break;
2390         case bulk_latency: /* 250 usec aka 4000 ints/s */
2391                 if (bytes > 25000) {
2392                         if (packets > 35)
2393                                 retval = low_latency;
2394                 } else if (bytes < 6000) {
2395                         retval = low_latency;
2396                 }
2397                 break;
2398         }
2399
2400         return retval;
2401 }
2402
2403 static void e1000_set_itr(struct e1000_adapter *adapter)
2404 {
2405         struct e1000_hw *hw = &adapter->hw;
2406         u16 current_itr;
2407         u32 new_itr = adapter->itr;
2408
2409         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2410         if (adapter->link_speed != SPEED_1000) {
2411                 current_itr = 0;
2412                 new_itr = 4000;
2413                 goto set_itr_now;
2414         }
2415
2416         if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2417                 new_itr = 0;
2418                 goto set_itr_now;
2419         }
2420
2421         adapter->tx_itr = e1000_update_itr(adapter,
2422                                     adapter->tx_itr,
2423                                     adapter->total_tx_packets,
2424                                     adapter->total_tx_bytes);
2425         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2426         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2427                 adapter->tx_itr = low_latency;
2428
2429         adapter->rx_itr = e1000_update_itr(adapter,
2430                                     adapter->rx_itr,
2431                                     adapter->total_rx_packets,
2432                                     adapter->total_rx_bytes);
2433         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2434         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2435                 adapter->rx_itr = low_latency;
2436
2437         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2438
2439         switch (current_itr) {
2440         /* counts and packets in update_itr are dependent on these numbers */
2441         case lowest_latency:
2442                 new_itr = 70000;
2443                 break;
2444         case low_latency:
2445                 new_itr = 20000; /* aka hwitr = ~200 */
2446                 break;
2447         case bulk_latency:
2448                 new_itr = 4000;
2449                 break;
2450         default:
2451                 break;
2452         }
2453
2454 set_itr_now:
2455         if (new_itr != adapter->itr) {
2456                 /*
2457                  * this attempts to bias the interrupt rate towards Bulk
2458                  * by adding intermediate steps when interrupt rate is
2459                  * increasing
2460                  */
2461                 new_itr = new_itr > adapter->itr ?
2462                              min(adapter->itr + (new_itr >> 2), new_itr) :
2463                              new_itr;
2464                 adapter->itr = new_itr;
2465                 adapter->rx_ring->itr_val = new_itr;
2466                 if (adapter->msix_entries)
2467                         adapter->rx_ring->set_itr = 1;
2468                 else
2469                         if (new_itr)
2470                                 ew32(ITR, 1000000000 / (new_itr * 256));
2471                         else
2472                                 ew32(ITR, 0);
2473         }
2474 }
2475
2476 /**
2477  * e1000_alloc_queues - Allocate memory for all rings
2478  * @adapter: board private structure to initialize
2479  **/
2480 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
2481 {
2482         int size = sizeof(struct e1000_ring);
2483
2484         adapter->tx_ring = kzalloc(size, GFP_KERNEL);
2485         if (!adapter->tx_ring)
2486                 goto err;
2487         adapter->tx_ring->count = adapter->tx_ring_count;
2488         adapter->tx_ring->adapter = adapter;
2489
2490         adapter->rx_ring = kzalloc(size, GFP_KERNEL);
2491         if (!adapter->rx_ring)
2492                 goto err;
2493         adapter->rx_ring->count = adapter->rx_ring_count;
2494         adapter->rx_ring->adapter = adapter;
2495
2496         return 0;
2497 err:
2498         e_err("Unable to allocate memory for queues\n");
2499         kfree(adapter->rx_ring);
2500         kfree(adapter->tx_ring);
2501         return -ENOMEM;
2502 }
2503
2504 /**
2505  * e1000e_poll - NAPI Rx polling callback
2506  * @napi: struct associated with this polling callback
2507  * @weight: number of packets driver is allowed to process this poll
2508  **/
2509 static int e1000e_poll(struct napi_struct *napi, int weight)
2510 {
2511         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2512                                                      napi);
2513         struct e1000_hw *hw = &adapter->hw;
2514         struct net_device *poll_dev = adapter->netdev;
2515         int tx_cleaned = 1, work_done = 0;
2516
2517         adapter = netdev_priv(poll_dev);
2518
2519         if (!adapter->msix_entries ||
2520             (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2521                 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
2522
2523         adapter->clean_rx(adapter->rx_ring, &work_done, weight);
2524
2525         if (!tx_cleaned)
2526                 work_done = weight;
2527
2528         /* If weight not fully consumed, exit the polling mode */
2529         if (work_done < weight) {
2530                 if (adapter->itr_setting & 3)
2531                         e1000_set_itr(adapter);
2532                 napi_complete(napi);
2533                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2534                         if (adapter->msix_entries)
2535                                 ew32(IMS, adapter->rx_ring->ims_val);
2536                         else
2537                                 e1000_irq_enable(adapter);
2538                 }
2539         }
2540
2541         return work_done;
2542 }
2543
2544 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2545 {
2546         struct e1000_adapter *adapter = netdev_priv(netdev);
2547         struct e1000_hw *hw = &adapter->hw;
2548         u32 vfta, index;
2549
2550         /* don't update vlan cookie if already programmed */
2551         if ((adapter->hw.mng_cookie.status &
2552              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2553             (vid == adapter->mng_vlan_id))
2554                 return 0;
2555
2556         /* add VID to filter table */
2557         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2558                 index = (vid >> 5) & 0x7F;
2559                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2560                 vfta |= (1 << (vid & 0x1F));
2561                 hw->mac.ops.write_vfta(hw, index, vfta);
2562         }
2563
2564         set_bit(vid, adapter->active_vlans);
2565
2566         return 0;
2567 }
2568
2569 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2570 {
2571         struct e1000_adapter *adapter = netdev_priv(netdev);
2572         struct e1000_hw *hw = &adapter->hw;
2573         u32 vfta, index;
2574
2575         if ((adapter->hw.mng_cookie.status &
2576              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2577             (vid == adapter->mng_vlan_id)) {
2578                 /* release control to f/w */
2579                 e1000e_release_hw_control(adapter);
2580                 return 0;
2581         }
2582
2583         /* remove VID from filter table */
2584         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2585                 index = (vid >> 5) & 0x7F;
2586                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2587                 vfta &= ~(1 << (vid & 0x1F));
2588                 hw->mac.ops.write_vfta(hw, index, vfta);
2589         }
2590
2591         clear_bit(vid, adapter->active_vlans);
2592
2593         return 0;
2594 }
2595
2596 /**
2597  * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2598  * @adapter: board private structure to initialize
2599  **/
2600 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2601 {
2602         struct net_device *netdev = adapter->netdev;
2603         struct e1000_hw *hw = &adapter->hw;
2604         u32 rctl;
2605
2606         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2607                 /* disable VLAN receive filtering */
2608                 rctl = er32(RCTL);
2609                 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2610                 ew32(RCTL, rctl);
2611
2612                 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2613                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2614                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2615                 }
2616         }
2617 }
2618
2619 /**
2620  * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2621  * @adapter: board private structure to initialize
2622  **/
2623 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2624 {
2625         struct e1000_hw *hw = &adapter->hw;
2626         u32 rctl;
2627
2628         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2629                 /* enable VLAN receive filtering */
2630                 rctl = er32(RCTL);
2631                 rctl |= E1000_RCTL_VFE;
2632                 rctl &= ~E1000_RCTL_CFIEN;
2633                 ew32(RCTL, rctl);
2634         }
2635 }
2636
2637 /**
2638  * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2639  * @adapter: board private structure to initialize
2640  **/
2641 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2642 {
2643         struct e1000_hw *hw = &adapter->hw;
2644         u32 ctrl;
2645
2646         /* disable VLAN tag insert/strip */
2647         ctrl = er32(CTRL);
2648         ctrl &= ~E1000_CTRL_VME;
2649         ew32(CTRL, ctrl);
2650 }
2651
2652 /**
2653  * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2654  * @adapter: board private structure to initialize
2655  **/
2656 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2657 {
2658         struct e1000_hw *hw = &adapter->hw;
2659         u32 ctrl;
2660
2661         /* enable VLAN tag insert/strip */
2662         ctrl = er32(CTRL);
2663         ctrl |= E1000_CTRL_VME;
2664         ew32(CTRL, ctrl);
2665 }
2666
2667 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2668 {
2669         struct net_device *netdev = adapter->netdev;
2670         u16 vid = adapter->hw.mng_cookie.vlan_id;
2671         u16 old_vid = adapter->mng_vlan_id;
2672
2673         if (adapter->hw.mng_cookie.status &
2674             E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2675                 e1000_vlan_rx_add_vid(netdev, vid);
2676                 adapter->mng_vlan_id = vid;
2677         }
2678
2679         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2680                 e1000_vlan_rx_kill_vid(netdev, old_vid);
2681 }
2682
2683 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2684 {
2685         u16 vid;
2686
2687         e1000_vlan_rx_add_vid(adapter->netdev, 0);
2688
2689         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2690                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2691 }
2692
2693 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2694 {
2695         struct e1000_hw *hw = &adapter->hw;
2696         u32 manc, manc2h, mdef, i, j;
2697
2698         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2699                 return;
2700
2701         manc = er32(MANC);
2702
2703         /*
2704          * enable receiving management packets to the host. this will probably
2705          * generate destination unreachable messages from the host OS, but
2706          * the packets will be handled on SMBUS
2707          */
2708         manc |= E1000_MANC_EN_MNG2HOST;
2709         manc2h = er32(MANC2H);
2710
2711         switch (hw->mac.type) {
2712         default:
2713                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2714                 break;
2715         case e1000_82574:
2716         case e1000_82583:
2717                 /*
2718                  * Check if IPMI pass-through decision filter already exists;
2719                  * if so, enable it.
2720                  */
2721                 for (i = 0, j = 0; i < 8; i++) {
2722                         mdef = er32(MDEF(i));
2723
2724                         /* Ignore filters with anything other than IPMI ports */
2725                         if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2726                                 continue;
2727
2728                         /* Enable this decision filter in MANC2H */
2729                         if (mdef)
2730                                 manc2h |= (1 << i);
2731
2732                         j |= mdef;
2733                 }
2734
2735                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2736                         break;
2737
2738                 /* Create new decision filter in an empty filter */
2739                 for (i = 0, j = 0; i < 8; i++)
2740                         if (er32(MDEF(i)) == 0) {
2741                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2742                                                E1000_MDEF_PORT_664));
2743                                 manc2h |= (1 << 1);
2744                                 j++;
2745                                 break;
2746                         }
2747
2748                 if (!j)
2749                         e_warn("Unable to create IPMI pass-through filter\n");
2750                 break;
2751         }
2752
2753         ew32(MANC2H, manc2h);
2754         ew32(MANC, manc);
2755 }
2756
2757 /**
2758  * e1000_configure_tx - Configure Transmit Unit after Reset
2759  * @adapter: board private structure
2760  *
2761  * Configure the Tx unit of the MAC after a reset.
2762  **/
2763 static void e1000_configure_tx(struct e1000_adapter *adapter)
2764 {
2765         struct e1000_hw *hw = &adapter->hw;
2766         struct e1000_ring *tx_ring = adapter->tx_ring;
2767         u64 tdba;
2768         u32 tdlen, tarc;
2769
2770         /* Setup the HW Tx Head and Tail descriptor pointers */
2771         tdba = tx_ring->dma;
2772         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2773         ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2774         ew32(TDBAH(0), (tdba >> 32));
2775         ew32(TDLEN(0), tdlen);
2776         ew32(TDH(0), 0);
2777         ew32(TDT(0), 0);
2778         tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2779         tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
2780
2781         /* Set the Tx Interrupt Delay register */
2782         ew32(TIDV, adapter->tx_int_delay);
2783         /* Tx irq moderation */
2784         ew32(TADV, adapter->tx_abs_int_delay);
2785
2786         if (adapter->flags2 & FLAG2_DMA_BURST) {
2787                 u32 txdctl = er32(TXDCTL(0));
2788                 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2789                             E1000_TXDCTL_WTHRESH);
2790                 /*
2791                  * set up some performance related parameters to encourage the
2792                  * hardware to use the bus more efficiently in bursts, depends
2793                  * on the tx_int_delay to be enabled,
2794                  * wthresh = 5 ==> burst write a cacheline (64 bytes) at a time
2795                  * hthresh = 1 ==> prefetch when one or more available
2796                  * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2797                  * BEWARE: this seems to work but should be considered first if
2798                  * there are Tx hangs or other Tx related bugs
2799                  */
2800                 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2801                 ew32(TXDCTL(0), txdctl);
2802         }
2803         /* erratum work around: set txdctl the same for both queues */
2804         ew32(TXDCTL(1), er32(TXDCTL(0)));
2805
2806         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2807                 tarc = er32(TARC(0));
2808                 /*
2809                  * set the speed mode bit, we'll clear it if we're not at
2810                  * gigabit link later
2811                  */
2812 #define SPEED_MODE_BIT (1 << 21)
2813                 tarc |= SPEED_MODE_BIT;
2814                 ew32(TARC(0), tarc);
2815         }
2816
2817         /* errata: program both queues to unweighted RR */
2818         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2819                 tarc = er32(TARC(0));
2820                 tarc |= 1;
2821                 ew32(TARC(0), tarc);
2822                 tarc = er32(TARC(1));
2823                 tarc |= 1;
2824                 ew32(TARC(1), tarc);
2825         }
2826
2827         /* Setup Transmit Descriptor Settings for eop descriptor */
2828         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2829
2830         /* only set IDE if we are delaying interrupts using the timers */
2831         if (adapter->tx_int_delay)
2832                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2833
2834         /* enable Report Status bit */
2835         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2836
2837         hw->mac.ops.config_collision_dist(hw);
2838 }
2839
2840 /**
2841  * e1000_setup_rctl - configure the receive control registers
2842  * @adapter: Board private structure
2843  **/
2844 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2845                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2846 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2847 {
2848         struct e1000_hw *hw = &adapter->hw;
2849         u32 rctl, rfctl;
2850         u32 pages = 0;
2851
2852         /* Workaround Si errata on PCHx - configure jumbo frame flow */
2853         if (hw->mac.type >= e1000_pch2lan) {
2854                 s32 ret_val;
2855
2856                 if (adapter->netdev->mtu > ETH_DATA_LEN)
2857                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
2858                 else
2859                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
2860
2861                 if (ret_val)
2862                         e_dbg("failed to enable jumbo frame workaround mode\n");
2863         }
2864
2865         /* Program MC offset vector base */
2866         rctl = er32(RCTL);
2867         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2868         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2869                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2870                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2871
2872         /* Do not Store bad packets */
2873         rctl &= ~E1000_RCTL_SBP;
2874
2875         /* Enable Long Packet receive */
2876         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2877                 rctl &= ~E1000_RCTL_LPE;
2878         else
2879                 rctl |= E1000_RCTL_LPE;
2880
2881         /* Some systems expect that the CRC is included in SMBUS traffic. The
2882          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2883          * host memory when this is enabled
2884          */
2885         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2886                 rctl |= E1000_RCTL_SECRC;
2887
2888         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2889         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2890                 u16 phy_data;
2891
2892                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2893                 phy_data &= 0xfff8;
2894                 phy_data |= (1 << 2);
2895                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2896
2897                 e1e_rphy(hw, 22, &phy_data);
2898                 phy_data &= 0x0fff;
2899                 phy_data |= (1 << 14);
2900                 e1e_wphy(hw, 0x10, 0x2823);
2901                 e1e_wphy(hw, 0x11, 0x0003);
2902                 e1e_wphy(hw, 22, phy_data);
2903         }
2904
2905         /* Setup buffer sizes */
2906         rctl &= ~E1000_RCTL_SZ_4096;
2907         rctl |= E1000_RCTL_BSEX;
2908         switch (adapter->rx_buffer_len) {
2909         case 2048:
2910         default:
2911                 rctl |= E1000_RCTL_SZ_2048;
2912                 rctl &= ~E1000_RCTL_BSEX;
2913                 break;
2914         case 4096:
2915                 rctl |= E1000_RCTL_SZ_4096;
2916                 break;
2917         case 8192:
2918                 rctl |= E1000_RCTL_SZ_8192;
2919                 break;
2920         case 16384:
2921                 rctl |= E1000_RCTL_SZ_16384;
2922                 break;
2923         }
2924
2925         /* Enable Extended Status in all Receive Descriptors */
2926         rfctl = er32(RFCTL);
2927         rfctl |= E1000_RFCTL_EXTEN;
2928         ew32(RFCTL, rfctl);
2929
2930         /*
2931          * 82571 and greater support packet-split where the protocol
2932          * header is placed in skb->data and the packet data is
2933          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2934          * In the case of a non-split, skb->data is linearly filled,
2935          * followed by the page buffers.  Therefore, skb->data is
2936          * sized to hold the largest protocol header.
2937          *
2938          * allocations using alloc_page take too long for regular MTU
2939          * so only enable packet split for jumbo frames
2940          *
2941          * Using pages when the page size is greater than 16k wastes
2942          * a lot of memory, since we allocate 3 pages at all times
2943          * per packet.
2944          */
2945         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2946         if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2947                 adapter->rx_ps_pages = pages;
2948         else
2949                 adapter->rx_ps_pages = 0;
2950
2951         if (adapter->rx_ps_pages) {
2952                 u32 psrctl = 0;
2953
2954                 /* Enable Packet split descriptors */
2955                 rctl |= E1000_RCTL_DTYP_PS;
2956
2957                 psrctl |= adapter->rx_ps_bsize0 >>
2958                         E1000_PSRCTL_BSIZE0_SHIFT;
2959
2960                 switch (adapter->rx_ps_pages) {
2961                 case 3:
2962                         psrctl |= PAGE_SIZE <<
2963                                 E1000_PSRCTL_BSIZE3_SHIFT;
2964                 case 2:
2965                         psrctl |= PAGE_SIZE <<
2966                                 E1000_PSRCTL_BSIZE2_SHIFT;
2967                 case 1:
2968                         psrctl |= PAGE_SIZE >>
2969                                 E1000_PSRCTL_BSIZE1_SHIFT;
2970                         break;
2971                 }
2972
2973                 ew32(PSRCTL, psrctl);
2974         }
2975
2976         /* This is useful for sniffing bad packets. */
2977         if (adapter->netdev->features & NETIF_F_RXALL) {
2978                 /* UPE and MPE will be handled by normal PROMISC logic
2979                  * in e1000e_set_rx_mode */
2980                 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
2981                          E1000_RCTL_BAM | /* RX All Bcast Pkts */
2982                          E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
2983
2984                 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
2985                           E1000_RCTL_DPF | /* Allow filtered pause */
2986                           E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
2987                 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
2988                  * and that breaks VLANs.
2989                  */
2990         }
2991
2992         ew32(RCTL, rctl);
2993         /* just started the receive unit, no need to restart */
2994         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2995 }
2996
2997 /**
2998  * e1000_configure_rx - Configure Receive Unit after Reset
2999  * @adapter: board private structure
3000  *
3001  * Configure the Rx unit of the MAC after a reset.
3002  **/
3003 static void e1000_configure_rx(struct e1000_adapter *adapter)
3004 {
3005         struct e1000_hw *hw = &adapter->hw;
3006         struct e1000_ring *rx_ring = adapter->rx_ring;
3007         u64 rdba;
3008         u32 rdlen, rctl, rxcsum, ctrl_ext;
3009
3010         if (adapter->rx_ps_pages) {
3011                 /* this is a 32 byte descriptor */
3012                 rdlen = rx_ring->count *
3013                     sizeof(union e1000_rx_desc_packet_split);
3014                 adapter->clean_rx = e1000_clean_rx_irq_ps;
3015                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
3016         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
3017                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3018                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3019                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
3020         } else {
3021                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3022                 adapter->clean_rx = e1000_clean_rx_irq;
3023                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3024         }
3025
3026         /* disable receives while setting up the descriptors */
3027         rctl = er32(RCTL);
3028         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3029                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3030         e1e_flush();
3031         usleep_range(10000, 20000);
3032
3033         if (adapter->flags2 & FLAG2_DMA_BURST) {
3034                 /*
3035                  * set the writeback threshold (only takes effect if the RDTR
3036                  * is set). set GRAN=1 and write back up to 0x4 worth, and
3037                  * enable prefetching of 0x20 Rx descriptors
3038                  * granularity = 01
3039                  * wthresh = 04,
3040                  * hthresh = 04,
3041                  * pthresh = 0x20
3042                  */
3043                 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3044                 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3045
3046                 /*
3047                  * override the delay timers for enabling bursting, only if
3048                  * the value was not set by the user via module options
3049                  */
3050                 if (adapter->rx_int_delay == DEFAULT_RDTR)
3051                         adapter->rx_int_delay = BURST_RDTR;
3052                 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3053                         adapter->rx_abs_int_delay = BURST_RADV;
3054         }
3055
3056         /* set the Receive Delay Timer Register */
3057         ew32(RDTR, adapter->rx_int_delay);
3058
3059         /* irq moderation */
3060         ew32(RADV, adapter->rx_abs_int_delay);
3061         if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3062                 ew32(ITR, 1000000000 / (adapter->itr * 256));
3063
3064         ctrl_ext = er32(CTRL_EXT);
3065         /* Auto-Mask interrupts upon ICR access */
3066         ctrl_ext |= E1000_CTRL_EXT_IAME;
3067         ew32(IAM, 0xffffffff);
3068         ew32(CTRL_EXT, ctrl_ext);
3069         e1e_flush();
3070
3071         /*
3072          * Setup the HW Rx Head and Tail Descriptor Pointers and
3073          * the Base and Length of the Rx Descriptor Ring
3074          */
3075         rdba = rx_ring->dma;
3076         ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3077         ew32(RDBAH(0), (rdba >> 32));
3078         ew32(RDLEN(0), rdlen);
3079         ew32(RDH(0), 0);
3080         ew32(RDT(0), 0);
3081         rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3082         rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
3083
3084         /* Enable Receive Checksum Offload for TCP and UDP */
3085         rxcsum = er32(RXCSUM);
3086         if (adapter->netdev->features & NETIF_F_RXCSUM)
3087                 rxcsum |= E1000_RXCSUM_TUOFL;
3088         else
3089                 rxcsum &= ~E1000_RXCSUM_TUOFL;
3090         ew32(RXCSUM, rxcsum);
3091
3092         if (adapter->hw.mac.type == e1000_pch2lan) {
3093                 /*
3094                  * With jumbo frames, excessive C-state transition
3095                  * latencies result in dropped transactions.
3096                  */
3097                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3098                         u32 rxdctl = er32(RXDCTL(0));
3099                         ew32(RXDCTL(0), rxdctl | 0x3);
3100                         pm_qos_update_request(&adapter->netdev->pm_qos_req, 55);
3101                 } else {
3102                         pm_qos_update_request(&adapter->netdev->pm_qos_req,
3103                                               PM_QOS_DEFAULT_VALUE);
3104                 }
3105         }
3106
3107         /* Enable Receives */
3108         ew32(RCTL, rctl);
3109 }
3110
3111 /**
3112  * e1000e_write_mc_addr_list - write multicast addresses to MTA
3113  * @netdev: network interface device structure
3114  *
3115  * Writes multicast address list to the MTA hash table.
3116  * Returns: -ENOMEM on failure
3117  *                0 on no addresses written
3118  *                X on writing X addresses to MTA
3119  */
3120 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3121 {
3122         struct e1000_adapter *adapter = netdev_priv(netdev);
3123         struct e1000_hw *hw = &adapter->hw;
3124         struct netdev_hw_addr *ha;
3125         u8 *mta_list;
3126         int i;
3127
3128         if (netdev_mc_empty(netdev)) {
3129                 /* nothing to program, so clear mc list */
3130                 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3131                 return 0;
3132         }
3133
3134         mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3135         if (!mta_list)
3136                 return -ENOMEM;
3137
3138         /* update_mc_addr_list expects a packed array of only addresses. */
3139         i = 0;
3140         netdev_for_each_mc_addr(ha, netdev)
3141                 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3142
3143         hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3144         kfree(mta_list);
3145
3146         return netdev_mc_count(netdev);
3147 }
3148
3149 /**
3150  * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3151  * @netdev: network interface device structure
3152  *
3153  * Writes unicast address list to the RAR table.
3154  * Returns: -ENOMEM on failure/insufficient address space
3155  *                0 on no addresses written
3156  *                X on writing X addresses to the RAR table
3157  **/
3158 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3159 {
3160         struct e1000_adapter *adapter = netdev_priv(netdev);
3161         struct e1000_hw *hw = &adapter->hw;
3162         unsigned int rar_entries = hw->mac.rar_entry_count;
3163         int count = 0;
3164
3165         /* save a rar entry for our hardware address */
3166         rar_entries--;
3167
3168         /* save a rar entry for the LAA workaround */
3169         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3170                 rar_entries--;
3171
3172         /* return ENOMEM indicating insufficient memory for addresses */
3173         if (netdev_uc_count(netdev) > rar_entries)
3174                 return -ENOMEM;
3175
3176         if (!netdev_uc_empty(netdev) && rar_entries) {
3177                 struct netdev_hw_addr *ha;
3178
3179                 /*
3180                  * write the addresses in reverse order to avoid write
3181                  * combining
3182                  */
3183                 netdev_for_each_uc_addr(ha, netdev) {
3184                         if (!rar_entries)
3185                                 break;
3186                         hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3187                         count++;
3188                 }
3189         }
3190
3191         /* zero out the remaining RAR entries not used above */
3192         for (; rar_entries > 0; rar_entries--) {
3193                 ew32(RAH(rar_entries), 0);
3194                 ew32(RAL(rar_entries), 0);
3195         }
3196         e1e_flush();
3197
3198         return count;
3199 }
3200
3201 /**
3202  * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3203  * @netdev: network interface device structure
3204  *
3205  * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3206  * address list or the network interface flags are updated.  This routine is
3207  * responsible for configuring the hardware for proper unicast, multicast,
3208  * promiscuous mode, and all-multi behavior.
3209  **/
3210 static void e1000e_set_rx_mode(struct net_device *netdev)
3211 {
3212         struct e1000_adapter *adapter = netdev_priv(netdev);
3213         struct e1000_hw *hw = &adapter->hw;
3214         u32 rctl;
3215
3216         /* Check for Promiscuous and All Multicast modes */
3217         rctl = er32(RCTL);
3218
3219         /* clear the affected bits */
3220         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3221
3222         if (netdev->flags & IFF_PROMISC) {
3223                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3224                 /* Do not hardware filter VLANs in promisc mode */
3225                 e1000e_vlan_filter_disable(adapter);
3226         } else {
3227                 int count;
3228
3229                 if (netdev->flags & IFF_ALLMULTI) {
3230                         rctl |= E1000_RCTL_MPE;
3231                 } else {
3232                         /*
3233                          * Write addresses to the MTA, if the attempt fails
3234                          * then we should just turn on promiscuous mode so
3235                          * that we can at least receive multicast traffic
3236                          */
3237                         count = e1000e_write_mc_addr_list(netdev);
3238                         if (count < 0)
3239                                 rctl |= E1000_RCTL_MPE;
3240                 }
3241                 e1000e_vlan_filter_enable(adapter);
3242                 /*
3243                  * Write addresses to available RAR registers, if there is not
3244                  * sufficient space to store all the addresses then enable
3245                  * unicast promiscuous mode
3246                  */
3247                 count = e1000e_write_uc_addr_list(netdev);
3248                 if (count < 0)
3249                         rctl |= E1000_RCTL_UPE;
3250         }
3251
3252         ew32(RCTL, rctl);
3253
3254         if (netdev->features & NETIF_F_HW_VLAN_RX)
3255                 e1000e_vlan_strip_enable(adapter);
3256         else
3257                 e1000e_vlan_strip_disable(adapter);
3258 }
3259
3260 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3261 {
3262         struct e1000_hw *hw = &adapter->hw;
3263         u32 mrqc, rxcsum;
3264         int i;
3265         static const u32 rsskey[10] = {
3266                 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3267                 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3268         };
3269
3270         /* Fill out hash function seed */
3271         for (i = 0; i < 10; i++)
3272                 ew32(RSSRK(i), rsskey[i]);
3273
3274         /* Direct all traffic to queue 0 */
3275         for (i = 0; i < 32; i++)
3276                 ew32(RETA(i), 0);
3277
3278         /*
3279          * Disable raw packet checksumming so that RSS hash is placed in
3280          * descriptor on writeback.
3281          */
3282         rxcsum = er32(RXCSUM);
3283         rxcsum |= E1000_RXCSUM_PCSD;
3284
3285         ew32(RXCSUM, rxcsum);
3286
3287         mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3288                 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3289                 E1000_MRQC_RSS_FIELD_IPV6 |
3290                 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3291                 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3292
3293         ew32(MRQC, mrqc);
3294 }
3295
3296 /**
3297  * e1000_configure - configure the hardware for Rx and Tx
3298  * @adapter: private board structure
3299  **/
3300 static void e1000_configure(struct e1000_adapter *adapter)
3301 {
3302         struct e1000_ring *rx_ring = adapter->rx_ring;
3303
3304         e1000e_set_rx_mode(adapter->netdev);
3305
3306         e1000_restore_vlan(adapter);
3307         e1000_init_manageability_pt(adapter);
3308
3309         e1000_configure_tx(adapter);
3310
3311         if (adapter->netdev->features & NETIF_F_RXHASH)
3312                 e1000e_setup_rss_hash(adapter);
3313         e1000_setup_rctl(adapter);
3314         e1000_configure_rx(adapter);
3315         adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
3316 }
3317
3318 /**
3319  * e1000e_power_up_phy - restore link in case the phy was powered down
3320  * @adapter: address of board private structure
3321  *
3322  * The phy may be powered down to save power and turn off link when the
3323  * driver is unloaded and wake on lan is not enabled (among others)
3324  * *** this routine MUST be followed by a call to e1000e_reset ***
3325  **/
3326 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3327 {
3328         if (adapter->hw.phy.ops.power_up)
3329                 adapter->hw.phy.ops.power_up(&adapter->hw);
3330
3331         adapter->hw.mac.ops.setup_link(&adapter->hw);
3332 }
3333
3334 /**
3335  * e1000_power_down_phy - Power down the PHY
3336  *
3337  * Power down the PHY so no link is implied when interface is down.
3338  * The PHY cannot be powered down if management or WoL is active.
3339  */
3340 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3341 {
3342         /* WoL is enabled */
3343         if (adapter->wol)
3344                 return;
3345
3346         if (adapter->hw.phy.ops.power_down)
3347                 adapter->hw.phy.ops.power_down(&adapter->hw);
3348 }
3349
3350 /**
3351  * e1000e_reset - bring the hardware into a known good state
3352  *
3353  * This function boots the hardware and enables some settings that
3354  * require a configuration cycle of the hardware - those cannot be
3355  * set/changed during runtime. After reset the device needs to be
3356  * properly configured for Rx, Tx etc.
3357  */
3358 void e1000e_reset(struct e1000_adapter *adapter)
3359 {
3360         struct e1000_mac_info *mac = &adapter->hw.mac;
3361         struct e1000_fc_info *fc = &adapter->hw.fc;
3362         struct e1000_hw *hw = &adapter->hw;
3363         u32 tx_space, min_tx_space, min_rx_space;
3364         u32 pba = adapter->pba;
3365         u16 hwm;
3366
3367         /* reset Packet Buffer Allocation to default */
3368         ew32(PBA, pba);
3369
3370         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3371                 /*
3372                  * To maintain wire speed transmits, the Tx FIFO should be
3373                  * large enough to accommodate two full transmit packets,
3374                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3375                  * the Rx FIFO should be large enough to accommodate at least
3376                  * one full receive packet and is similarly rounded up and
3377                  * expressed in KB.
3378                  */
3379                 pba = er32(PBA);
3380                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3381                 tx_space = pba >> 16;
3382                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3383                 pba &= 0xffff;
3384                 /*
3385                  * the Tx fifo also stores 16 bytes of information about the Tx
3386                  * but don't include ethernet FCS because hardware appends it
3387                  */
3388                 min_tx_space = (adapter->max_frame_size +
3389                                 sizeof(struct e1000_tx_desc) -
3390                                 ETH_FCS_LEN) * 2;
3391                 min_tx_space = ALIGN(min_tx_space, 1024);
3392                 min_tx_space >>= 10;
3393                 /* software strips receive CRC, so leave room for it */
3394                 min_rx_space = adapter->max_frame_size;
3395                 min_rx_space = ALIGN(min_rx_space, 1024);
3396                 min_rx_space >>= 10;
3397
3398                 /*
3399                  * If current Tx allocation is less than the min Tx FIFO size,
3400                  * and the min Tx FIFO size is less than the current Rx FIFO
3401                  * allocation, take space away from current Rx allocation
3402                  */
3403                 if ((tx_space < min_tx_space) &&
3404                     ((min_tx_space - tx_space) < pba)) {
3405                         pba -= min_tx_space - tx_space;
3406
3407                         /*
3408                          * if short on Rx space, Rx wins and must trump Tx
3409                          * adjustment or use Early Receive if available
3410                          */
3411                         if (pba < min_rx_space)
3412                                 pba = min_rx_space;
3413                 }
3414
3415                 ew32(PBA, pba);
3416         }
3417
3418         /*
3419          * flow control settings
3420          *
3421          * The high water mark must be low enough to fit one full frame
3422          * (or the size used for early receive) above it in the Rx FIFO.
3423          * Set it to the lower of:
3424          * - 90% of the Rx FIFO size, and
3425          * - the full Rx FIFO size minus one full frame
3426          */
3427         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3428                 fc->pause_time = 0xFFFF;
3429         else
3430                 fc->pause_time = E1000_FC_PAUSE_TIME;
3431         fc->send_xon = true;
3432         fc->current_mode = fc->requested_mode;
3433
3434         switch (hw->mac.type) {
3435         case e1000_ich9lan:
3436         case e1000_ich10lan:
3437                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3438                         pba = 14;
3439                         ew32(PBA, pba);
3440                         fc->high_water = 0x2800;
3441                         fc->low_water = fc->high_water - 8;
3442                         break;
3443                 }
3444                 /* fall-through */
3445         default:
3446                 hwm = min(((pba << 10) * 9 / 10),
3447                           ((pba << 10) - adapter->max_frame_size));
3448
3449                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3450                 fc->low_water = fc->high_water - 8;
3451                 break;
3452         case e1000_pchlan:
3453                 /*
3454                  * Workaround PCH LOM adapter hangs with certain network
3455                  * loads.  If hangs persist, try disabling Tx flow control.
3456                  */
3457                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3458                         fc->high_water = 0x3500;
3459                         fc->low_water  = 0x1500;
3460                 } else {
3461                         fc->high_water = 0x5000;
3462                         fc->low_water  = 0x3000;
3463                 }
3464                 fc->refresh_time = 0x1000;
3465                 break;
3466         case e1000_pch2lan:
3467         case e1000_pch_lpt:
3468                 fc->high_water = 0x05C20;
3469                 fc->low_water = 0x05048;
3470                 fc->pause_time = 0x0650;
3471                 fc->refresh_time = 0x0400;
3472                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3473                         pba = 14;
3474                         ew32(PBA, pba);
3475                 }
3476                 break;
3477         }
3478
3479         /*
3480          * Disable Adaptive Interrupt Moderation if 2 full packets cannot
3481          * fit in receive buffer.
3482          */
3483         if (adapter->itr_setting & 0x3) {
3484                 if ((adapter->max_frame_size * 2) > (pba << 10)) {
3485                         if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3486                                 dev_info(&adapter->pdev->dev,
3487                                         "Interrupt Throttle Rate turned off\n");
3488                                 adapter->flags2 |= FLAG2_DISABLE_AIM;
3489                                 ew32(ITR, 0);
3490                         }
3491                 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3492                         dev_info(&adapter->pdev->dev,
3493                                  "Interrupt Throttle Rate turned on\n");
3494                         adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3495                         adapter->itr = 20000;
3496                         ew32(ITR, 1000000000 / (adapter->itr * 256));
3497                 }
3498         }
3499
3500         /* Allow time for pending master requests to run */
3501         mac->ops.reset_hw(hw);
3502
3503         /*
3504          * For parts with AMT enabled, let the firmware know
3505          * that the network interface is in control
3506          */
3507         if (adapter->flags & FLAG_HAS_AMT)
3508                 e1000e_get_hw_control(adapter);
3509
3510         ew32(WUC, 0);
3511
3512         if (mac->ops.init_hw(hw))
3513                 e_err("Hardware Error\n");
3514
3515         e1000_update_mng_vlan(adapter);
3516
3517         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3518         ew32(VET, ETH_P_8021Q);
3519
3520         e1000e_reset_adaptive(hw);
3521
3522         if (!netif_running(adapter->netdev) &&
3523             !test_bit(__E1000_TESTING, &adapter->state)) {
3524                 e1000_power_down_phy(adapter);
3525                 return;
3526         }
3527
3528         e1000_get_phy_info(hw);
3529
3530         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3531             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3532                 u16 phy_data = 0;
3533                 /*
3534                  * speed up time to link by disabling smart power down, ignore
3535                  * the return value of this function because there is nothing
3536                  * different we would do if it failed
3537                  */
3538                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3539                 phy_data &= ~IGP02E1000_PM_SPD;
3540                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3541         }
3542 }
3543
3544 int e1000e_up(struct e1000_adapter *adapter)
3545 {
3546         struct e1000_hw *hw = &adapter->hw;
3547
3548         /* hardware has been reset, we need to reload some things */
3549         e1000_configure(adapter);
3550
3551         clear_bit(__E1000_DOWN, &adapter->state);
3552
3553         if (adapter->msix_entries)
3554                 e1000_configure_msix(adapter);
3555         e1000_irq_enable(adapter);
3556
3557         netif_start_queue(adapter->netdev);
3558
3559         /* fire a link change interrupt to start the watchdog */
3560         if (adapter->msix_entries)
3561                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3562         else
3563                 ew32(ICS, E1000_ICS_LSC);
3564
3565         return 0;
3566 }
3567
3568 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3569 {
3570         struct e1000_hw *hw = &adapter->hw;
3571
3572         if (!(adapter->flags2 & FLAG2_DMA_BURST))
3573                 return;
3574
3575         /* flush pending descriptor writebacks to memory */
3576         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3577         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3578
3579         /* execute the writes immediately */
3580         e1e_flush();
3581
3582         /*
3583          * due to rare timing issues, write to TIDV/RDTR again to ensure the
3584          * write is successful
3585          */
3586         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3587         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3588
3589         /* execute the writes immediately */
3590         e1e_flush();
3591 }
3592
3593 static void e1000e_update_stats(struct e1000_adapter *adapter);
3594
3595 void e1000e_down(struct e1000_adapter *adapter)
3596 {
3597         struct net_device *netdev = adapter->netdev;
3598         struct e1000_hw *hw = &adapter->hw;
3599         u32 tctl, rctl;
3600
3601         /*
3602          * signal that we're down so the interrupt handler does not
3603          * reschedule our watchdog timer
3604          */
3605         set_bit(__E1000_DOWN, &adapter->state);
3606
3607         /* disable receives in the hardware */
3608         rctl = er32(RCTL);
3609         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3610                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3611         /* flush and sleep below */
3612
3613         netif_stop_queue(netdev);
3614
3615         /* disable transmits in the hardware */
3616         tctl = er32(TCTL);
3617         tctl &= ~E1000_TCTL_EN;
3618         ew32(TCTL, tctl);
3619
3620         /* flush both disables and wait for them to finish */
3621         e1e_flush();
3622         usleep_range(10000, 20000);
3623
3624         e1000_irq_disable(adapter);
3625
3626         del_timer_sync(&adapter->watchdog_timer);
3627         del_timer_sync(&adapter->phy_info_timer);
3628
3629         netif_carrier_off(netdev);
3630
3631         spin_lock(&adapter->stats64_lock);
3632         e1000e_update_stats(adapter);
3633         spin_unlock(&adapter->stats64_lock);
3634
3635         e1000e_flush_descriptors(adapter);
3636         e1000_clean_tx_ring(adapter->tx_ring);
3637         e1000_clean_rx_ring(adapter->rx_ring);
3638
3639         adapter->link_speed = 0;
3640         adapter->link_duplex = 0;
3641
3642         if (!pci_channel_offline(adapter->pdev))
3643                 e1000e_reset(adapter);
3644
3645         /*
3646          * TODO: for power management, we could drop the link and
3647          * pci_disable_device here.
3648          */
3649 }
3650
3651 void e1000e_reinit_locked(struct e1000_adapter *adapter)
3652 {
3653         might_sleep();
3654         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3655                 usleep_range(1000, 2000);
3656         e1000e_down(adapter);
3657         e1000e_up(adapter);
3658         clear_bit(__E1000_RESETTING, &adapter->state);
3659 }
3660
3661 /**
3662  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
3663  * @adapter: board private structure to initialize
3664  *
3665  * e1000_sw_init initializes the Adapter private data structure.
3666  * Fields are initialized based on PCI device information and
3667  * OS network device settings (MTU size).
3668  **/
3669 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
3670 {
3671         struct net_device *netdev = adapter->netdev;
3672
3673         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
3674         adapter->rx_ps_bsize0 = 128;
3675         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3676         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
3677         adapter->tx_ring_count = E1000_DEFAULT_TXD;
3678         adapter->rx_ring_count = E1000_DEFAULT_RXD;
3679
3680         spin_lock_init(&adapter->stats64_lock);
3681
3682         e1000e_set_interrupt_capability(adapter);
3683
3684         if (e1000_alloc_queues(adapter))
3685                 return -ENOMEM;
3686
3687         /* Explicitly disable IRQ since the NIC can be in any state. */
3688         e1000_irq_disable(adapter);
3689
3690         set_bit(__E1000_DOWN, &adapter->state);
3691         return 0;
3692 }
3693
3694 /**
3695  * e1000_intr_msi_test - Interrupt Handler
3696  * @irq: interrupt number
3697  * @data: pointer to a network interface device structure
3698  **/
3699 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
3700 {
3701         struct net_device *netdev = data;
3702         struct e1000_adapter *adapter = netdev_priv(netdev);
3703         struct e1000_hw *hw = &adapter->hw;
3704         u32 icr = er32(ICR);
3705
3706         e_dbg("icr is %08X\n", icr);
3707         if (icr & E1000_ICR_RXSEQ) {
3708                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
3709                 wmb();
3710         }
3711
3712         return IRQ_HANDLED;
3713 }
3714
3715 /**
3716  * e1000_test_msi_interrupt - Returns 0 for successful test
3717  * @adapter: board private struct
3718  *
3719  * code flow taken from tg3.c
3720  **/
3721 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
3722 {
3723         struct net_device *netdev = adapter->netdev;
3724         struct e1000_hw *hw = &adapter->hw;
3725         int err;
3726
3727         /* poll_enable hasn't been called yet, so don't need disable */
3728         /* clear any pending events */
3729         er32(ICR);
3730
3731         /* free the real vector and request a test handler */
3732         e1000_free_irq(adapter);
3733         e1000e_reset_interrupt_capability(adapter);
3734
3735         /* Assume that the test fails, if it succeeds then the test
3736          * MSI irq handler will unset this flag */
3737         adapter->flags |= FLAG_MSI_TEST_FAILED;
3738
3739         err = pci_enable_msi(adapter->pdev);
3740         if (err)
3741                 goto msi_test_failed;
3742
3743         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
3744                           netdev->name, netdev);
3745         if (err) {
3746                 pci_disable_msi(adapter->pdev);
3747                 goto msi_test_failed;
3748         }
3749
3750         wmb();
3751
3752         e1000_irq_enable(adapter);
3753
3754         /* fire an unusual interrupt on the test handler */
3755         ew32(ICS, E1000_ICS_RXSEQ);
3756         e1e_flush();
3757         msleep(100);
3758
3759         e1000_irq_disable(adapter);
3760
3761         rmb();
3762
3763         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3764                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3765                 e_info("MSI interrupt test failed, using legacy interrupt.\n");
3766         } else {
3767                 e_dbg("MSI interrupt test succeeded!\n");
3768         }
3769
3770         free_irq(adapter->pdev->irq, netdev);
3771         pci_disable_msi(adapter->pdev);
3772
3773 msi_test_failed:
3774         e1000e_set_interrupt_capability(adapter);
3775         return e1000_request_irq(adapter);
3776 }
3777
3778 /**
3779  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3780  * @adapter: board private struct
3781  *
3782  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3783  **/
3784 static int e1000_test_msi(struct e1000_adapter *adapter)
3785 {
3786         int err;
3787         u16 pci_cmd;
3788
3789         if (!(adapter->flags & FLAG_MSI_ENABLED))
3790                 return 0;
3791
3792         /* disable SERR in case the MSI write causes a master abort */
3793         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3794         if (pci_cmd & PCI_COMMAND_SERR)
3795                 pci_write_config_word(adapter->pdev, PCI_COMMAND,
3796                                       pci_cmd & ~PCI_COMMAND_SERR);
3797
3798         err = e1000_test_msi_interrupt(adapter);
3799
3800         /* re-enable SERR */
3801         if (pci_cmd & PCI_COMMAND_SERR) {
3802                 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3803                 pci_cmd |= PCI_COMMAND_SERR;
3804                 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3805         }
3806
3807         return err;
3808 }
3809
3810 /**
3811  * e1000_open - Called when a network interface is made active
3812  * @netdev: network interface device structure
3813  *
3814  * Returns 0 on success, negative value on failure
3815  *
3816  * The open entry point is called when a network interface is made
3817  * active by the system (IFF_UP).  At this point all resources needed
3818  * for transmit and receive operations are allocated, the interrupt
3819  * handler is registered with the OS, the watchdog timer is started,
3820  * and the stack is notified that the interface is ready.
3821  **/
3822 static int e1000_open(struct net_device *netdev)
3823 {
3824         struct e1000_adapter *adapter = netdev_priv(netdev);
3825         struct e1000_hw *hw = &adapter->hw;
3826         struct pci_dev *pdev = adapter->pdev;
3827         int err;
3828
3829         /* disallow open during test */
3830         if (test_bit(__E1000_TESTING, &adapter->state))
3831                 return -EBUSY;
3832
3833         pm_runtime_get_sync(&pdev->dev);
3834
3835         netif_carrier_off(netdev);
3836
3837         /* allocate transmit descriptors */
3838         err = e1000e_setup_tx_resources(adapter->tx_ring);
3839         if (err)
3840                 goto err_setup_tx;
3841
3842         /* allocate receive descriptors */
3843         err = e1000e_setup_rx_resources(adapter->rx_ring);
3844         if (err)
3845                 goto err_setup_rx;
3846
3847         /*
3848          * If AMT is enabled, let the firmware know that the network
3849          * interface is now open and reset the part to a known state.
3850          */
3851         if (adapter->flags & FLAG_HAS_AMT) {
3852                 e1000e_get_hw_control(adapter);
3853                 e1000e_reset(adapter);
3854         }
3855
3856         e1000e_power_up_phy(adapter);
3857
3858         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3859         if ((adapter->hw.mng_cookie.status &
3860              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3861                 e1000_update_mng_vlan(adapter);
3862
3863         /* DMA latency requirement to workaround jumbo issue */
3864         if (adapter->hw.mac.type == e1000_pch2lan)
3865                 pm_qos_add_request(&adapter->netdev->pm_qos_req,
3866                                    PM_QOS_CPU_DMA_LATENCY,
3867                                    PM_QOS_DEFAULT_VALUE);
3868
3869         /*
3870          * before we allocate an interrupt, we must be ready to handle it.
3871          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3872          * as soon as we call pci_request_irq, so we have to setup our
3873          * clean_rx handler before we do so.
3874          */
3875         e1000_configure(adapter);
3876
3877         err = e1000_request_irq(adapter);
3878         if (err)
3879                 goto err_req_irq;
3880
3881         /*
3882          * Work around PCIe errata with MSI interrupts causing some chipsets to
3883          * ignore e1000e MSI messages, which means we need to test our MSI
3884          * interrupt now
3885          */
3886         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3887                 err = e1000_test_msi(adapter);
3888                 if (err) {
3889                         e_err("Interrupt allocation failed\n");
3890                         goto err_req_irq;
3891                 }
3892         }
3893
3894         /* From here on the code is the same as e1000e_up() */
3895         clear_bit(__E1000_DOWN, &adapter->state);
3896
3897         napi_enable(&adapter->napi);
3898
3899         e1000_irq_enable(adapter);
3900
3901         adapter->tx_hang_recheck = false;
3902         netif_start_queue(netdev);
3903
3904         adapter->idle_check = true;
3905         pm_runtime_put(&pdev->dev);
3906
3907         /* fire a link status change interrupt to start the watchdog */
3908         if (adapter->msix_entries)
3909                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3910         else
3911                 ew32(ICS, E1000_ICS_LSC);
3912
3913         return 0;
3914
3915 err_req_irq:
3916         e1000e_release_hw_control(adapter);
3917         e1000_power_down_phy(adapter);
3918         e1000e_free_rx_resources(adapter->rx_ring);
3919 err_setup_rx:
3920         e1000e_free_tx_resources(adapter->tx_ring);
3921 err_setup_tx:
3922         e1000e_reset(adapter);
3923         pm_runtime_put_sync(&pdev->dev);
3924
3925         return err;
3926 }
3927
3928 /**
3929  * e1000_close - Disables a network interface
3930  * @netdev: network interface device structure
3931  *
3932  * Returns 0, this is not allowed to fail
3933  *
3934  * The close entry point is called when an interface is de-activated
3935  * by the OS.  The hardware is still under the drivers control, but
3936  * needs to be disabled.  A global MAC reset is issued to stop the
3937  * hardware, and all transmit and receive resources are freed.
3938  **/
3939 static int e1000_close(struct net_device *netdev)
3940 {
3941         struct e1000_adapter *adapter = netdev_priv(netdev);
3942         struct pci_dev *pdev = adapter->pdev;
3943         int count = E1000_CHECK_RESET_COUNT;
3944
3945         while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
3946                 usleep_range(10000, 20000);
3947
3948         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3949
3950         pm_runtime_get_sync(&pdev->dev);
3951
3952         napi_disable(&adapter->napi);
3953
3954         if (!test_bit(__E1000_DOWN, &adapter->state)) {
3955                 e1000e_down(adapter);
3956                 e1000_free_irq(adapter);
3957         }
3958         e1000_power_down_phy(adapter);
3959
3960         e1000e_free_tx_resources(adapter->tx_ring);
3961         e1000e_free_rx_resources(adapter->rx_ring);
3962
3963         /*
3964          * kill manageability vlan ID if supported, but not if a vlan with
3965          * the same ID is registered on the host OS (let 8021q kill it)
3966          */
3967         if (adapter->hw.mng_cookie.status &
3968             E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
3969                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3970
3971         /*
3972          * If AMT is enabled, let the firmware know that the network
3973          * interface is now closed
3974          */
3975         if ((adapter->flags & FLAG_HAS_AMT) &&
3976             !test_bit(__E1000_TESTING, &adapter->state))
3977                 e1000e_release_hw_control(adapter);
3978
3979         if (adapter->hw.mac.type == e1000_pch2lan)
3980                 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
3981
3982         pm_runtime_put_sync(&pdev->dev);
3983
3984         return 0;
3985 }
3986 /**
3987  * e1000_set_mac - Change the Ethernet Address of the NIC
3988  * @netdev: network interface device structure
3989  * @p: pointer to an address structure
3990  *
3991  * Returns 0 on success, negative on failure
3992  **/
3993 static int e1000_set_mac(struct net_device *netdev, void *p)
3994 {
3995         struct e1000_adapter *adapter = netdev_priv(netdev);
3996         struct e1000_hw *hw = &adapter->hw;
3997         struct sockaddr *addr = p;
3998
3999         if (!is_valid_ether_addr(addr->sa_data))
4000                 return -EADDRNOTAVAIL;
4001
4002         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4003         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4004
4005         hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
4006
4007         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4008                 /* activate the work around */
4009                 e1000e_set_laa_state_82571(&adapter->hw, 1);
4010
4011                 /*
4012                  * Hold a copy of the LAA in RAR[14] This is done so that
4013                  * between the time RAR[0] gets clobbered  and the time it
4014                  * gets fixed (in e1000_watchdog), the actual LAA is in one
4015                  * of the RARs and no incoming packets directed to this port
4016                  * are dropped. Eventually the LAA will be in RAR[0] and
4017                  * RAR[14]
4018                  */
4019                 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4020                                     adapter->hw.mac.rar_entry_count - 1);
4021         }
4022
4023         return 0;
4024 }
4025
4026 /**
4027  * e1000e_update_phy_task - work thread to update phy
4028  * @work: pointer to our work struct
4029  *
4030  * this worker thread exists because we must acquire a
4031  * semaphore to read the phy, which we could msleep while
4032  * waiting for it, and we can't msleep in a timer.
4033  **/
4034 static void e1000e_update_phy_task(struct work_struct *work)
4035 {
4036         struct e1000_adapter *adapter = container_of(work,
4037                                         struct e1000_adapter, update_phy_task);
4038
4039         if (test_bit(__E1000_DOWN, &adapter->state))
4040                 return;
4041
4042         e1000_get_phy_info(&adapter->hw);
4043 }
4044
4045 /*
4046  * Need to wait a few seconds after link up to get diagnostic information from
4047  * the phy
4048  */
4049 static void e1000_update_phy_info(unsigned long data)
4050 {
4051         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4052
4053         if (test_bit(__E1000_DOWN, &adapter->state))
4054                 return;
4055
4056         schedule_work(&adapter->update_phy_task);
4057 }
4058
4059 /**
4060  * e1000e_update_phy_stats - Update the PHY statistics counters
4061  * @adapter: board private structure
4062  *
4063  * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4064  **/
4065 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4066 {
4067         struct e1000_hw *hw = &adapter->hw;
4068         s32 ret_val;
4069         u16 phy_data;
4070
4071         ret_val = hw->phy.ops.acquire(hw);
4072         if (ret_val)
4073                 return;
4074
4075         /*
4076          * A page set is expensive so check if already on desired page.
4077          * If not, set to the page with the PHY status registers.
4078          */
4079         hw->phy.addr = 1;
4080         ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4081                                            &phy_data);
4082         if (ret_val)
4083                 goto release;
4084         if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4085                 ret_val = hw->phy.ops.set_page(hw,
4086                                                HV_STATS_PAGE << IGP_PAGE_SHIFT);
4087                 if (ret_val)
4088                         goto release;
4089         }
4090
4091         /* Single Collision Count */
4092         hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4093         ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4094         if (!ret_val)
4095                 adapter->stats.scc += phy_data;
4096
4097         /* Excessive Collision Count */
4098         hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4099         ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4100         if (!ret_val)
4101                 adapter->stats.ecol += phy_data;
4102
4103         /* Multiple Collision Count */
4104         hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4105         ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4106         if (!ret_val)
4107                 adapter->stats.mcc += phy_data;
4108
4109         /* Late Collision Count */
4110         hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4111         ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4112         if (!ret_val)
4113                 adapter->stats.latecol += phy_data;
4114
4115         /* Collision Count - also used for adaptive IFS */
4116         hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4117         ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4118         if (!ret_val)
4119                 hw->mac.collision_delta = phy_data;
4120
4121         /* Defer Count */
4122         hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4123         ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4124         if (!ret_val)
4125                 adapter->stats.dc += phy_data;
4126
4127         /* Transmit with no CRS */
4128         hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4129         ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4130         if (!ret_val)
4131                 adapter->stats.tncrs += phy_data;
4132
4133 release:
4134         hw->phy.ops.release(hw);
4135 }
4136
4137 /**
4138  * e1000e_update_stats - Update the board statistics counters
4139  * @adapter: board private structure
4140  **/
4141 static void e1000e_update_stats(struct e1000_adapter *adapter)
4142 {
4143         struct net_device *netdev = adapter->netdev;
4144         struct e1000_hw *hw = &adapter->hw;
4145         struct pci_dev *pdev = adapter->pdev;
4146
4147         /*
4148          * Prevent stats update while adapter is being reset, or if the pci
4149          * connection is down.
4150          */
4151         if (adapter->link_speed == 0)
4152                 return;
4153         if (pci_channel_offline(pdev))
4154                 return;
4155
4156         adapter->stats.crcerrs += er32(CRCERRS);
4157         adapter->stats.gprc += er32(GPRC);
4158         adapter->stats.gorc += er32(GORCL);
4159         er32(GORCH); /* Clear gorc */
4160         adapter->stats.bprc += er32(BPRC);
4161         adapter->stats.mprc += er32(MPRC);
4162         adapter->stats.roc += er32(ROC);
4163
4164         adapter->stats.mpc += er32(MPC);
4165
4166         /* Half-duplex statistics */
4167         if (adapter->link_duplex == HALF_DUPLEX) {
4168                 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4169                         e1000e_update_phy_stats(adapter);
4170                 } else {
4171                         adapter->stats.scc += er32(SCC);
4172                         adapter->stats.ecol += er32(ECOL);
4173                         adapter->stats.mcc += er32(MCC);
4174                         adapter->stats.latecol += er32(LATECOL);
4175                         adapter->stats.dc += er32(DC);
4176
4177                         hw->mac.collision_delta = er32(COLC);
4178
4179                         if ((hw->mac.type != e1000_82574) &&
4180                             (hw->mac.type != e1000_82583))
4181                                 adapter->stats.tncrs += er32(TNCRS);
4182                 }
4183                 adapter->stats.colc += hw->mac.collision_delta;
4184         }
4185
4186         adapter->stats.xonrxc += er32(XONRXC);
4187         adapter->stats.xontxc += er32(XONTXC);
4188         adapter->stats.xoffrxc += er32(XOFFRXC);
4189         adapter->stats.xofftxc += er32(XOFFTXC);
4190         adapter->stats.gptc += er32(GPTC);
4191         adapter->stats.gotc += er32(GOTCL);
4192         er32(GOTCH); /* Clear gotc */
4193         adapter->stats.rnbc += er32(RNBC);
4194         adapter->stats.ruc += er32(RUC);
4195
4196         adapter->stats.mptc += er32(MPTC);
4197         adapter->stats.bptc += er32(BPTC);
4198
4199         /* used for adaptive IFS */
4200
4201         hw->mac.tx_packet_delta = er32(TPT);
4202         adapter->stats.tpt += hw->mac.tx_packet_delta;
4203
4204         adapter->stats.algnerrc += er32(ALGNERRC);
4205         adapter->stats.rxerrc += er32(RXERRC);
4206         adapter->stats.cexterr += er32(CEXTERR);
4207         adapter->stats.tsctc += er32(TSCTC);
4208         adapter->stats.tsctfc += er32(TSCTFC);
4209
4210         /* Fill out the OS statistics structure */
4211         netdev->stats.multicast = adapter->stats.mprc;
4212         netdev->stats.collisions = adapter->stats.colc;
4213
4214         /* Rx Errors */
4215
4216         /*
4217          * RLEC on some newer hardware can be incorrect so build
4218          * our own version based on RUC and ROC
4219          */
4220         netdev->stats.rx_errors = adapter->stats.rxerrc +
4221                 adapter->stats.crcerrs + adapter->stats.algnerrc +
4222                 adapter->stats.ruc + adapter->stats.roc +
4223                 adapter->stats.cexterr;
4224         netdev->stats.rx_length_errors = adapter->stats.ruc +
4225                                               adapter->stats.roc;
4226         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4227         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4228         netdev->stats.rx_missed_errors = adapter->stats.mpc;
4229
4230         /* Tx Errors */
4231         netdev->stats.tx_errors = adapter->stats.ecol +
4232                                        adapter->stats.latecol;
4233         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4234         netdev->stats.tx_window_errors = adapter->stats.latecol;
4235         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4236
4237         /* Tx Dropped needs to be maintained elsewhere */
4238
4239         /* Management Stats */
4240         adapter->stats.mgptc += er32(MGTPTC);
4241         adapter->stats.mgprc += er32(MGTPRC);
4242         adapter->stats.mgpdc += er32(MGTPDC);
4243 }
4244
4245 /**
4246  * e1000_phy_read_status - Update the PHY register status snapshot
4247  * @adapter: board private structure
4248  **/
4249 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4250 {
4251         struct e1000_hw *hw = &adapter->hw;
4252         struct e1000_phy_regs *phy = &adapter->phy_regs;
4253
4254         if ((er32(STATUS) & E1000_STATUS_LU) &&
4255             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4256                 int ret_val;
4257
4258                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
4259                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
4260                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
4261                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
4262                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
4263                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
4264                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
4265                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
4266                 if (ret_val)
4267                         e_warn("Error reading PHY register\n");
4268         } else {
4269                 /*
4270                  * Do not read PHY registers if link is not up
4271                  * Set values to typical power-on defaults
4272                  */
4273                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4274                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4275                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4276                              BMSR_ERCAP);
4277                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4278                                   ADVERTISE_ALL | ADVERTISE_CSMA);
4279                 phy->lpa = 0;
4280                 phy->expansion = EXPANSION_ENABLENPAGE;
4281                 phy->ctrl1000 = ADVERTISE_1000FULL;
4282                 phy->stat1000 = 0;
4283                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4284         }
4285 }
4286
4287 static void e1000_print_link_info(struct e1000_adapter *adapter)
4288 {
4289         struct e1000_hw *hw = &adapter->hw;
4290         u32 ctrl = er32(CTRL);
4291
4292         /* Link status message must follow this format for user tools */
4293         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4294                 adapter->netdev->name,
4295                 adapter->link_speed,
4296                 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4297                 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4298                 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4299                 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4300 }
4301
4302 static bool e1000e_has_link(struct e1000_adapter *adapter)
4303 {
4304         struct e1000_hw *hw = &adapter->hw;
4305         bool link_active = false;
4306         s32 ret_val = 0;
4307
4308         /*
4309          * get_link_status is set on LSC (link status) interrupt or
4310          * Rx sequence error interrupt.  get_link_status will stay
4311          * false until the check_for_link establishes link
4312          * for copper adapters ONLY
4313          */
4314         switch (hw->phy.media_type) {
4315         case e1000_media_type_copper:
4316                 if (hw->mac.get_link_status) {
4317                         ret_val = hw->mac.ops.check_for_link(hw);
4318                         link_active = !hw->mac.get_link_status;
4319                 } else {
4320                         link_active = true;
4321                 }
4322                 break;
4323         case e1000_media_type_fiber:
4324                 ret_val = hw->mac.ops.check_for_link(hw);
4325                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4326                 break;
4327         case e1000_media_type_internal_serdes:
4328                 ret_val = hw->mac.ops.check_for_link(hw);
4329                 link_active = adapter->hw.mac.serdes_has_link;
4330                 break;
4331         default:
4332         case e1000_media_type_unknown:
4333                 break;
4334         }
4335
4336         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4337             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4338                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4339                 e_info("Gigabit has been disabled, downgrading speed\n");
4340         }
4341
4342         return link_active;
4343 }
4344
4345 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4346 {
4347         /* make sure the receive unit is started */
4348         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4349             (adapter->flags & FLAG_RX_RESTART_NOW)) {
4350                 struct e1000_hw *hw = &adapter->hw;
4351                 u32 rctl = er32(RCTL);
4352                 ew32(RCTL, rctl | E1000_RCTL_EN);
4353                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
4354         }
4355 }
4356
4357 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4358 {
4359         struct e1000_hw *hw = &adapter->hw;
4360
4361         /*
4362          * With 82574 controllers, PHY needs to be checked periodically
4363          * for hung state and reset, if two calls return true
4364          */
4365         if (e1000_check_phy_82574(hw))
4366                 adapter->phy_hang_count++;
4367         else
4368                 adapter->phy_hang_count = 0;
4369
4370         if (adapter->phy_hang_count > 1) {
4371                 adapter->phy_hang_count = 0;
4372                 schedule_work(&adapter->reset_task);
4373         }
4374 }
4375
4376 /**
4377  * e1000_watchdog - Timer Call-back
4378  * @data: pointer to adapter cast into an unsigned long
4379  **/
4380 static void e1000_watchdog(unsigned long data)
4381 {
4382         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4383
4384         /* Do the rest outside of interrupt context */
4385         schedule_work(&adapter->watchdog_task);
4386
4387         /* TODO: make this use queue_delayed_work() */
4388 }
4389
4390 static void e1000_watchdog_task(struct work_struct *work)
4391 {
4392         struct e1000_adapter *adapter = container_of(work,
4393                                         struct e1000_adapter, watchdog_task);
4394         struct net_device *netdev = adapter->netdev;
4395         struct e1000_mac_info *mac = &adapter->hw.mac;
4396         struct e1000_phy_info *phy = &adapter->hw.phy;
4397         struct e1000_ring *tx_ring = adapter->tx_ring;
4398         struct e1000_hw *hw = &adapter->hw;
4399         u32 link, tctl;
4400
4401         if (test_bit(__E1000_DOWN, &adapter->state))
4402                 return;
4403
4404         link = e1000e_has_link(adapter);
4405         if ((netif_carrier_ok(netdev)) && link) {
4406                 /* Cancel scheduled suspend requests. */
4407                 pm_runtime_resume(netdev->dev.parent);
4408
4409                 e1000e_enable_receives(adapter);
4410                 goto link_up;
4411         }
4412
4413         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4414             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4415                 e1000_update_mng_vlan(adapter);
4416
4417         if (link) {
4418                 if (!netif_carrier_ok(netdev)) {
4419                         bool txb2b = true;
4420
4421                         /* Cancel scheduled suspend requests. */
4422                         pm_runtime_resume(netdev->dev.parent);
4423
4424                         /* update snapshot of PHY registers on LSC */
4425                         e1000_phy_read_status(adapter);
4426                         mac->ops.get_link_up_info(&adapter->hw,
4427                                                    &adapter->link_speed,
4428                                                    &adapter->link_duplex);
4429                         e1000_print_link_info(adapter);
4430                         /*
4431                          * On supported PHYs, check for duplex mismatch only
4432                          * if link has autonegotiated at 10/100 half
4433                          */
4434                         if ((hw->phy.type == e1000_phy_igp_3 ||
4435                              hw->phy.type == e1000_phy_bm) &&
4436                             (hw->mac.autoneg == true) &&
4437                             (adapter->link_speed == SPEED_10 ||
4438                              adapter->link_speed == SPEED_100) &&
4439                             (adapter->link_duplex == HALF_DUPLEX)) {
4440                                 u16 autoneg_exp;
4441
4442                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
4443
4444                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
4445                                         e_info("Autonegotiated half duplex but link partner cannot autoneg.  Try forcing full duplex if link gets many collisions.\n");
4446                         }
4447
4448                         /* adjust timeout factor according to speed/duplex */
4449                         adapter->tx_timeout_factor = 1;
4450                         switch (adapter->link_speed) {
4451                         case SPEED_10:
4452                                 txb2b = false;
4453                                 adapter->tx_timeout_factor = 16;
4454                                 break;
4455                         case SPEED_100:
4456                                 txb2b = false;
4457                                 adapter->tx_timeout_factor = 10;
4458                                 break;
4459                         }
4460
4461                         /*
4462                          * workaround: re-program speed mode bit after
4463                          * link-up event
4464                          */
4465                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4466                             !txb2b) {
4467                                 u32 tarc0;
4468                                 tarc0 = er32(TARC(0));
4469                                 tarc0 &= ~SPEED_MODE_BIT;
4470                                 ew32(TARC(0), tarc0);
4471                         }
4472
4473                         /*
4474                          * disable TSO for pcie and 10/100 speeds, to avoid
4475                          * some hardware issues
4476                          */
4477                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4478                                 switch (adapter->link_speed) {
4479                                 case SPEED_10:
4480                                 case SPEED_100:
4481                                         e_info("10/100 speed: disabling TSO\n");
4482                                         netdev->features &= ~NETIF_F_TSO;
4483                                         netdev->features &= ~NETIF_F_TSO6;
4484                                         break;
4485                                 case SPEED_1000:
4486                                         netdev->features |= NETIF_F_TSO;
4487                                         netdev->features |= NETIF_F_TSO6;
4488                                         break;
4489                                 default:
4490                                         /* oops */
4491                                         break;
4492                                 }
4493                         }
4494
4495                         /*
4496                          * enable transmits in the hardware, need to do this
4497                          * after setting TARC(0)
4498                          */
4499                         tctl = er32(TCTL);
4500                         tctl |= E1000_TCTL_EN;
4501                         ew32(TCTL, tctl);
4502
4503                         /*
4504                          * Perform any post-link-up configuration before
4505                          * reporting link up.
4506                          */
4507                         if (phy->ops.cfg_on_link_up)
4508                                 phy->ops.cfg_on_link_up(hw);
4509
4510                         netif_carrier_on(netdev);
4511
4512                         if (!test_bit(__E1000_DOWN, &adapter->state))
4513                                 mod_timer(&adapter->phy_info_timer,
4514                                           round_jiffies(jiffies + 2 * HZ));
4515                 }
4516         } else {
4517                 if (netif_carrier_ok(netdev)) {
4518                         adapter->link_speed = 0;
4519                         adapter->link_duplex = 0;
4520                         /* Link status message must follow this format */
4521                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
4522                                adapter->netdev->name);
4523                         netif_carrier_off(netdev);
4524                         if (!test_bit(__E1000_DOWN, &adapter->state))
4525                                 mod_timer(&adapter->phy_info_timer,
4526                                           round_jiffies(jiffies + 2 * HZ));
4527
4528                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
4529                                 schedule_work(&adapter->reset_task);
4530                         else
4531                                 pm_schedule_suspend(netdev->dev.parent,
4532                                                         LINK_TIMEOUT);
4533                 }
4534         }
4535
4536 link_up:
4537         spin_lock(&adapter->stats64_lock);
4538         e1000e_update_stats(adapter);
4539
4540         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4541         adapter->tpt_old = adapter->stats.tpt;
4542         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4543         adapter->colc_old = adapter->stats.colc;
4544
4545         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4546         adapter->gorc_old = adapter->stats.gorc;
4547         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4548         adapter->gotc_old = adapter->stats.gotc;
4549         spin_unlock(&adapter->stats64_lock);
4550
4551         e1000e_update_adaptive(&adapter->hw);
4552
4553         if (!netif_carrier_ok(netdev) &&
4554             (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) {
4555                 /*
4556                  * We've lost link, so the controller stops DMA,
4557                  * but we've got queued Tx work that's never going
4558                  * to get done, so reset controller to flush Tx.
4559                  * (Do the reset outside of interrupt context).
4560                  */
4561                 schedule_work(&adapter->reset_task);
4562                 /* return immediately since reset is imminent */
4563                 return;
4564         }
4565
4566         /* Simple mode for Interrupt Throttle Rate (ITR) */
4567         if (adapter->itr_setting == 4) {
4568                 /*
4569                  * Symmetric Tx/Rx gets a reduced ITR=2000;
4570                  * Total asymmetrical Tx or Rx gets ITR=8000;
4571                  * everyone else is between 2000-8000.
4572                  */
4573                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4574                 u32 dif = (adapter->gotc > adapter->gorc ?
4575                             adapter->gotc - adapter->gorc :
4576                             adapter->gorc - adapter->gotc) / 10000;
4577                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4578
4579                 ew32(ITR, 1000000000 / (itr * 256));
4580         }
4581
4582         /* Cause software interrupt to ensure Rx ring is cleaned */
4583         if (adapter->msix_entries)
4584                 ew32(ICS, adapter->rx_ring->ims_val);
4585         else
4586                 ew32(ICS, E1000_ICS_RXDMT0);
4587
4588         /* flush pending descriptors to memory before detecting Tx hang */
4589         e1000e_flush_descriptors(adapter);
4590
4591         /* Force detection of hung controller every watchdog period */
4592         adapter->detect_tx_hung = true;
4593
4594         /*
4595          * With 82571 controllers, LAA may be overwritten due to controller
4596          * reset from the other port. Set the appropriate LAA in RAR[0]
4597          */
4598         if (e1000e_get_laa_state_82571(hw))
4599                 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
4600
4601         if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
4602                 e1000e_check_82574_phy_workaround(adapter);
4603
4604         /* Reset the timer */
4605         if (!test_bit(__E1000_DOWN, &adapter->state))
4606                 mod_timer(&adapter->watchdog_timer,
4607                           round_jiffies(jiffies + 2 * HZ));
4608 }
4609
4610 #define E1000_TX_FLAGS_CSUM             0x00000001
4611 #define E1000_TX_FLAGS_VLAN             0x00000002
4612 #define E1000_TX_FLAGS_TSO              0x00000004
4613 #define E1000_TX_FLAGS_IPV4             0x00000008
4614 #define E1000_TX_FLAGS_NO_FCS           0x00000010
4615 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
4616 #define E1000_TX_FLAGS_VLAN_SHIFT       16
4617
4618 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
4619 {
4620         struct e1000_context_desc *context_desc;
4621         struct e1000_buffer *buffer_info;
4622         unsigned int i;
4623         u32 cmd_length = 0;
4624         u16 ipcse = 0, tucse, mss;
4625         u8 ipcss, ipcso, tucss, tucso, hdr_len;
4626
4627         if (!skb_is_gso(skb))
4628                 return 0;
4629
4630         if (skb_header_cloned(skb)) {
4631                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4632
4633                 if (err)
4634                         return err;
4635         }
4636
4637         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4638         mss = skb_shinfo(skb)->gso_size;
4639         if (skb->protocol == htons(ETH_P_IP)) {
4640                 struct iphdr *iph = ip_hdr(skb);
4641                 iph->tot_len = 0;
4642                 iph->check = 0;
4643                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
4644                                                          0, IPPROTO_TCP, 0);
4645                 cmd_length = E1000_TXD_CMD_IP;
4646                 ipcse = skb_transport_offset(skb) - 1;
4647         } else if (skb_is_gso_v6(skb)) {
4648                 ipv6_hdr(skb)->payload_len = 0;
4649                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4650                                                        &ipv6_hdr(skb)->daddr,
4651                                                        0, IPPROTO_TCP, 0);
4652                 ipcse = 0;
4653         }
4654         ipcss = skb_network_offset(skb);
4655         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
4656         tucss = skb_transport_offset(skb);
4657         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
4658         tucse = 0;
4659
4660         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
4661                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
4662
4663         i = tx_ring->next_to_use;
4664         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4665         buffer_info = &tx_ring->buffer_info[i];
4666
4667         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
4668         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
4669         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
4670         context_desc->upper_setup.tcp_fields.tucss = tucss;
4671         context_desc->upper_setup.tcp_fields.tucso = tucso;
4672         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
4673         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
4674         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
4675         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
4676
4677         buffer_info->time_stamp = jiffies;
4678         buffer_info->next_to_watch = i;
4679
4680         i++;
4681         if (i == tx_ring->count)
4682                 i = 0;
4683         tx_ring->next_to_use = i;
4684
4685         return 1;
4686 }
4687
4688 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
4689 {
4690         struct e1000_adapter *adapter = tx_ring->adapter;
4691         struct e1000_context_desc *context_desc;
4692         struct e1000_buffer *buffer_info;
4693         unsigned int i;
4694         u8 css;
4695         u32 cmd_len = E1000_TXD_CMD_DEXT;
4696         __be16 protocol;
4697
4698         if (skb->ip_summed != CHECKSUM_PARTIAL)
4699                 return 0;
4700
4701         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
4702                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
4703         else
4704                 protocol = skb->protocol;
4705
4706         switch (protocol) {
4707         case cpu_to_be16(ETH_P_IP):
4708                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4709                         cmd_len |= E1000_TXD_CMD_TCP;
4710                 break;
4711         case cpu_to_be16(ETH_P_IPV6):
4712                 /* XXX not handling all IPV6 headers */
4713                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4714                         cmd_len |= E1000_TXD_CMD_TCP;
4715                 break;
4716         default:
4717                 if (unlikely(net_ratelimit()))
4718                         e_warn("checksum_partial proto=%x!\n",
4719                                be16_to_cpu(protocol));
4720                 break;
4721         }
4722
4723         css = skb_checksum_start_offset(skb);
4724
4725         i = tx_ring->next_to_use;
4726         buffer_info = &tx_ring->buffer_info[i];
4727         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4728
4729         context_desc->lower_setup.ip_config = 0;
4730         context_desc->upper_setup.tcp_fields.tucss = css;
4731         context_desc->upper_setup.tcp_fields.tucso =
4732                                 css + skb->csum_offset;
4733         context_desc->upper_setup.tcp_fields.tucse = 0;
4734         context_desc->tcp_seg_setup.data = 0;
4735         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
4736
4737         buffer_info->time_stamp = jiffies;
4738         buffer_info->next_to_watch = i;
4739
4740         i++;
4741         if (i == tx_ring->count)
4742                 i = 0;
4743         tx_ring->next_to_use = i;
4744
4745         return 1;
4746 }
4747
4748 #define E1000_MAX_PER_TXD       8192
4749 #define E1000_MAX_TXD_PWR       12
4750
4751 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
4752                         unsigned int first, unsigned int max_per_txd,
4753                         unsigned int nr_frags, unsigned int mss)
4754 {
4755         struct e1000_adapter *adapter = tx_ring->adapter;
4756         struct pci_dev *pdev = adapter->pdev;
4757         struct e1000_buffer *buffer_info;
4758         unsigned int len = skb_headlen(skb);
4759         unsigned int offset = 0, size, count = 0, i;
4760         unsigned int f, bytecount, segs;
4761
4762         i = tx_ring->next_to_use;
4763
4764         while (len) {
4765                 buffer_info = &tx_ring->buffer_info[i];
4766                 size = min(len, max_per_txd);
4767
4768                 buffer_info->length = size;
4769                 buffer_info->time_stamp = jiffies;
4770                 buffer_info->next_to_watch = i;
4771                 buffer_info->dma = dma_map_single(&pdev->dev,
4772                                                   skb->data + offset,
4773                                                   size, DMA_TO_DEVICE);
4774                 buffer_info->mapped_as_page = false;
4775                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4776                         goto dma_error;
4777
4778                 len -= size;
4779                 offset += size;
4780                 count++;
4781
4782                 if (len) {
4783                         i++;
4784                         if (i == tx_ring->count)
4785                                 i = 0;
4786                 }
4787         }
4788
4789         for (f = 0; f < nr_frags; f++) {
4790                 const struct skb_frag_struct *frag;
4791
4792                 frag = &skb_shinfo(skb)->frags[f];
4793                 len = skb_frag_size(frag);
4794                 offset = 0;
4795
4796                 while (len) {
4797                         i++;
4798                         if (i == tx_ring->count)
4799                                 i = 0;
4800
4801                         buffer_info = &tx_ring->buffer_info[i];
4802                         size = min(len, max_per_txd);
4803
4804                         buffer_info->length = size;
4805                         buffer_info->time_stamp = jiffies;
4806                         buffer_info->next_to_watch = i;
4807                         buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
4808                                                 offset, size, DMA_TO_DEVICE);
4809                         buffer_info->mapped_as_page = true;
4810                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4811                                 goto dma_error;
4812
4813                         len -= size;
4814                         offset += size;
4815                         count++;
4816                 }
4817         }
4818
4819         segs = skb_shinfo(skb)->gso_segs ? : 1;
4820         /* multiply data chunks by size of headers */
4821         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
4822
4823         tx_ring->buffer_info[i].skb = skb;
4824         tx_ring->buffer_info[i].segs = segs;
4825         tx_ring->buffer_info[i].bytecount = bytecount;
4826         tx_ring->buffer_info[first].next_to_watch = i;
4827
4828         return count;
4829
4830 dma_error:
4831         dev_err(&pdev->dev, "Tx DMA map failed\n");
4832         buffer_info->dma = 0;
4833         if (count)
4834                 count--;
4835
4836         while (count--) {
4837                 if (i == 0)
4838                         i += tx_ring->count;
4839                 i--;
4840                 buffer_info = &tx_ring->buffer_info[i];
4841                 e1000_put_txbuf(tx_ring, buffer_info);
4842         }
4843
4844         return 0;
4845 }
4846
4847 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
4848 {
4849         struct e1000_adapter *adapter = tx_ring->adapter;
4850         struct e1000_tx_desc *tx_desc = NULL;
4851         struct e1000_buffer *buffer_info;
4852         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
4853         unsigned int i;
4854
4855         if (tx_flags & E1000_TX_FLAGS_TSO) {
4856                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
4857                              E1000_TXD_CMD_TSE;
4858                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4859
4860                 if (tx_flags & E1000_TX_FLAGS_IPV4)
4861                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4862         }
4863
4864         if (tx_flags & E1000_TX_FLAGS_CSUM) {
4865                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4866                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4867         }
4868
4869         if (tx_flags & E1000_TX_FLAGS_VLAN) {
4870                 txd_lower |= E1000_TXD_CMD_VLE;
4871                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4872         }
4873
4874         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
4875                 txd_lower &= ~(E1000_TXD_CMD_IFCS);
4876
4877         i = tx_ring->next_to_use;
4878
4879         do {
4880                 buffer_info = &tx_ring->buffer_info[i];
4881                 tx_desc = E1000_TX_DESC(*tx_ring, i);
4882                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4883                 tx_desc->lower.data =
4884                         cpu_to_le32(txd_lower | buffer_info->length);
4885                 tx_desc->upper.data = cpu_to_le32(txd_upper);
4886
4887                 i++;
4888                 if (i == tx_ring->count)
4889                         i = 0;
4890         } while (--count > 0);
4891
4892         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4893
4894         /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
4895         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
4896                 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
4897
4898         /*
4899          * Force memory writes to complete before letting h/w
4900          * know there are new descriptors to fetch.  (Only
4901          * applicable for weak-ordered memory model archs,
4902          * such as IA-64).
4903          */
4904         wmb();
4905
4906         tx_ring->next_to_use = i;
4907
4908         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
4909                 e1000e_update_tdt_wa(tx_ring, i);
4910         else
4911                 writel(i, tx_ring->tail);
4912
4913         /*
4914          * we need this if more than one processor can write to our tail
4915          * at a time, it synchronizes IO on IA64/Altix systems
4916          */
4917         mmiowb();
4918 }
4919
4920 #define MINIMUM_DHCP_PACKET_SIZE 282
4921 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4922                                     struct sk_buff *skb)
4923 {
4924         struct e1000_hw *hw =  &adapter->hw;
4925         u16 length, offset;
4926
4927         if (vlan_tx_tag_present(skb)) {
4928                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4929                     (adapter->hw.mng_cookie.status &
4930                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4931                         return 0;
4932         }
4933
4934         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4935                 return 0;
4936
4937         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4938                 return 0;
4939
4940         {
4941                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4942                 struct udphdr *udp;
4943
4944                 if (ip->protocol != IPPROTO_UDP)
4945                         return 0;
4946
4947                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4948                 if (ntohs(udp->dest) != 67)
4949                         return 0;
4950
4951                 offset = (u8 *)udp + 8 - skb->data;
4952                 length = skb->len - offset;
4953                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4954         }
4955
4956         return 0;
4957 }
4958
4959 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
4960 {
4961         struct e1000_adapter *adapter = tx_ring->adapter;
4962
4963         netif_stop_queue(adapter->netdev);
4964         /*
4965          * Herbert's original patch had:
4966          *  smp_mb__after_netif_stop_queue();
4967          * but since that doesn't exist yet, just open code it.
4968          */
4969         smp_mb();
4970
4971         /*
4972          * We need to check again in a case another CPU has just
4973          * made room available.
4974          */
4975         if (e1000_desc_unused(tx_ring) < size)
4976                 return -EBUSY;
4977
4978         /* A reprieve! */
4979         netif_start_queue(adapter->netdev);
4980         ++adapter->restart_queue;
4981         return 0;
4982 }
4983
4984 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
4985 {
4986         if (e1000_desc_unused(tx_ring) >= size)
4987                 return 0;
4988         return __e1000_maybe_stop_tx(tx_ring, size);
4989 }
4990
4991 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1)
4992 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4993                                     struct net_device *netdev)
4994 {
4995         struct e1000_adapter *adapter = netdev_priv(netdev);
4996         struct e1000_ring *tx_ring = adapter->tx_ring;
4997         unsigned int first;
4998         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4999         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
5000         unsigned int tx_flags = 0;
5001         unsigned int len = skb_headlen(skb);
5002         unsigned int nr_frags;
5003         unsigned int mss;
5004         int count = 0;
5005         int tso;
5006         unsigned int f;
5007
5008         if (test_bit(__E1000_DOWN, &adapter->state)) {
5009                 dev_kfree_skb_any(skb);
5010                 return NETDEV_TX_OK;
5011         }
5012
5013         if (skb->len <= 0) {
5014                 dev_kfree_skb_any(skb);
5015                 return NETDEV_TX_OK;
5016         }
5017
5018         mss = skb_shinfo(skb)->gso_size;
5019         /*
5020          * The controller does a simple calculation to
5021          * make sure there is enough room in the FIFO before
5022          * initiating the DMA for each buffer.  The calc is:
5023          * 4 = ceil(buffer len/mss).  To make sure we don't
5024          * overrun the FIFO, adjust the max buffer len if mss
5025          * drops.
5026          */
5027         if (mss) {
5028                 u8 hdr_len;
5029                 max_per_txd = min(mss << 2, max_per_txd);
5030                 max_txd_pwr = fls(max_per_txd) - 1;
5031
5032                 /*
5033                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
5034                  * points to just header, pull a few bytes of payload from
5035                  * frags into skb->data
5036                  */
5037                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5038                 /*
5039                  * we do this workaround for ES2LAN, but it is un-necessary,
5040                  * avoiding it could save a lot of cycles
5041                  */
5042                 if (skb->data_len && (hdr_len == len)) {
5043                         unsigned int pull_size;
5044
5045                         pull_size = min_t(unsigned int, 4, skb->data_len);
5046                         if (!__pskb_pull_tail(skb, pull_size)) {
5047                                 e_err("__pskb_pull_tail failed.\n");
5048                                 dev_kfree_skb_any(skb);
5049                                 return NETDEV_TX_OK;
5050                         }
5051                         len = skb_headlen(skb);
5052                 }
5053         }
5054
5055         /* reserve a descriptor for the offload context */
5056         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5057                 count++;
5058         count++;
5059
5060         count += TXD_USE_COUNT(len, max_txd_pwr);
5061
5062         nr_frags = skb_shinfo(skb)->nr_frags;
5063         for (f = 0; f < nr_frags; f++)
5064                 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5065                                        max_txd_pwr);
5066
5067         if (adapter->hw.mac.tx_pkt_filtering)
5068                 e1000_transfer_dhcp_info(adapter, skb);
5069
5070         /*
5071          * need: count + 2 desc gap to keep tail from touching
5072          * head, otherwise try next time
5073          */
5074         if (e1000_maybe_stop_tx(tx_ring, count + 2))
5075                 return NETDEV_TX_BUSY;
5076
5077         if (vlan_tx_tag_present(skb)) {
5078                 tx_flags |= E1000_TX_FLAGS_VLAN;
5079                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5080         }
5081
5082         first = tx_ring->next_to_use;
5083
5084         tso = e1000_tso(tx_ring, skb);
5085         if (tso < 0) {
5086                 dev_kfree_skb_any(skb);
5087                 return NETDEV_TX_OK;
5088         }
5089
5090         if (tso)
5091                 tx_flags |= E1000_TX_FLAGS_TSO;
5092         else if (e1000_tx_csum(tx_ring, skb))
5093                 tx_flags |= E1000_TX_FLAGS_CSUM;
5094
5095         /*
5096          * Old method was to assume IPv4 packet by default if TSO was enabled.
5097          * 82571 hardware supports TSO capabilities for IPv6 as well...
5098          * no longer assume, we must.
5099          */
5100         if (skb->protocol == htons(ETH_P_IP))
5101                 tx_flags |= E1000_TX_FLAGS_IPV4;
5102
5103         if (unlikely(skb->no_fcs))
5104                 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5105
5106         /* if count is 0 then mapping error has occurred */
5107         count = e1000_tx_map(tx_ring, skb, first, max_per_txd, nr_frags, mss);
5108         if (count) {
5109                 skb_tx_timestamp(skb);
5110
5111                 netdev_sent_queue(netdev, skb->len);
5112                 e1000_tx_queue(tx_ring, tx_flags, count);
5113                 /* Make sure there is space in the ring for the next send. */
5114                 e1000_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 2);
5115
5116         } else {
5117                 dev_kfree_skb_any(skb);
5118                 tx_ring->buffer_info[first].time_stamp = 0;
5119                 tx_ring->next_to_use = first;
5120         }
5121
5122         return NETDEV_TX_OK;
5123 }
5124
5125 /**
5126  * e1000_tx_timeout - Respond to a Tx Hang
5127  * @netdev: network interface device structure
5128  **/
5129 static void e1000_tx_timeout(struct net_device *netdev)
5130 {
5131         struct e1000_adapter *adapter = netdev_priv(netdev);
5132
5133         /* Do the reset outside of interrupt context */
5134         adapter->tx_timeout_count++;
5135         schedule_work(&adapter->reset_task);
5136 }
5137
5138 static void e1000_reset_task(struct work_struct *work)
5139 {
5140         struct e1000_adapter *adapter;
5141         adapter = container_of(work, struct e1000_adapter, reset_task);
5142
5143         /* don't run the task if already down */
5144         if (test_bit(__E1000_DOWN, &adapter->state))
5145                 return;
5146
5147         if (!((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
5148               (adapter->flags & FLAG_RX_RESTART_NOW))) {
5149                 e1000e_dump(adapter);
5150                 e_err("Reset adapter\n");
5151         }
5152         e1000e_reinit_locked(adapter);
5153 }
5154
5155 /**
5156  * e1000_get_stats64 - Get System Network Statistics
5157  * @netdev: network interface device structure
5158  * @stats: rtnl_link_stats64 pointer
5159  *
5160  * Returns the address of the device statistics structure.
5161  **/
5162 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5163                                              struct rtnl_link_stats64 *stats)
5164 {
5165         struct e1000_adapter *adapter = netdev_priv(netdev);
5166
5167         memset(stats, 0, sizeof(struct rtnl_link_stats64));
5168         spin_lock(&adapter->stats64_lock);
5169         e1000e_update_stats(adapter);
5170         /* Fill out the OS statistics structure */
5171         stats->rx_bytes = adapter->stats.gorc;
5172         stats->rx_packets = adapter->stats.gprc;
5173         stats->tx_bytes = adapter->stats.gotc;
5174         stats->tx_packets = adapter->stats.gptc;
5175         stats->multicast = adapter->stats.mprc;
5176         stats->collisions = adapter->stats.colc;
5177
5178         /* Rx Errors */
5179
5180         /*
5181          * RLEC on some newer hardware can be incorrect so build
5182          * our own version based on RUC and ROC
5183          */
5184         stats->rx_errors = adapter->stats.rxerrc +
5185                 adapter->stats.crcerrs + adapter->stats.algnerrc +
5186                 adapter->stats.ruc + adapter->stats.roc +
5187                 adapter->stats.cexterr;
5188         stats->rx_length_errors = adapter->stats.ruc +
5189                                               adapter->stats.roc;
5190         stats->rx_crc_errors = adapter->stats.crcerrs;
5191         stats->rx_frame_errors = adapter->stats.algnerrc;
5192         stats->rx_missed_errors = adapter->stats.mpc;
5193
5194         /* Tx Errors */
5195         stats->tx_errors = adapter->stats.ecol +
5196                                        adapter->stats.latecol;
5197         stats->tx_aborted_errors = adapter->stats.ecol;
5198         stats->tx_window_errors = adapter->stats.latecol;
5199         stats->tx_carrier_errors = adapter->stats.tncrs;
5200
5201         /* Tx Dropped needs to be maintained elsewhere */
5202
5203         spin_unlock(&adapter->stats64_lock);
5204         return stats;
5205 }
5206
5207 /**
5208  * e1000_change_mtu - Change the Maximum Transfer Unit
5209  * @netdev: network interface device structure
5210  * @new_mtu: new value for maximum frame size
5211  *
5212  * Returns 0 on success, negative on failure
5213  **/
5214 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5215 {
5216         struct e1000_adapter *adapter = netdev_priv(netdev);
5217         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5218
5219         /* Jumbo frame support */
5220         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5221             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5222                 e_err("Jumbo Frames not supported.\n");
5223                 return -EINVAL;
5224         }
5225
5226         /* Supported frame sizes */
5227         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5228             (max_frame > adapter->max_hw_frame_size)) {
5229                 e_err("Unsupported MTU setting\n");
5230                 return -EINVAL;
5231         }
5232
5233         /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5234         if ((adapter->hw.mac.type >= e1000_pch2lan) &&
5235             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5236             (new_mtu > ETH_DATA_LEN)) {
5237                 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
5238                 return -EINVAL;
5239         }
5240
5241         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5242                 usleep_range(1000, 2000);
5243         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5244         adapter->max_frame_size = max_frame;
5245         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5246         netdev->mtu = new_mtu;
5247         if (netif_running(netdev))
5248                 e1000e_down(adapter);
5249
5250         /*
5251          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5252          * means we reserve 2 more, this pushes us to allocate from the next
5253          * larger slab size.
5254          * i.e. RXBUFFER_2048 --> size-4096 slab
5255          * However with the new *_jumbo_rx* routines, jumbo receives will use
5256          * fragmented skbs
5257          */
5258
5259         if (max_frame <= 2048)
5260                 adapter->rx_buffer_len = 2048;
5261         else
5262                 adapter->rx_buffer_len = 4096;
5263
5264         /* adjust allocation if LPE protects us, and we aren't using SBP */
5265         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5266              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5267                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5268                                          + ETH_FCS_LEN;
5269
5270         if (netif_running(netdev))
5271                 e1000e_up(adapter);
5272         else
5273                 e1000e_reset(adapter);
5274
5275         clear_bit(__E1000_RESETTING, &adapter->state);
5276
5277         return 0;
5278 }
5279
5280 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5281                            int cmd)
5282 {
5283         struct e1000_adapter *adapter = netdev_priv(netdev);
5284         struct mii_ioctl_data *data = if_mii(ifr);
5285
5286         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5287                 return -EOPNOTSUPP;
5288
5289         switch (cmd) {
5290         case SIOCGMIIPHY:
5291                 data->phy_id = adapter->hw.phy.addr;
5292                 break;
5293         case SIOCGMIIREG:
5294                 e1000_phy_read_status(adapter);
5295
5296                 switch (data->reg_num & 0x1F) {
5297                 case MII_BMCR:
5298                         data->val_out = adapter->phy_regs.bmcr;
5299                         break;
5300                 case MII_BMSR:
5301                         data->val_out = adapter->phy_regs.bmsr;
5302                         break;
5303                 case MII_PHYSID1:
5304                         data->val_out = (adapter->hw.phy.id >> 16);
5305                         break;
5306                 case MII_PHYSID2:
5307                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
5308                         break;
5309                 case MII_ADVERTISE:
5310                         data->val_out = adapter->phy_regs.advertise;
5311                         break;
5312                 case MII_LPA:
5313                         data->val_out = adapter->phy_regs.lpa;
5314                         break;
5315                 case MII_EXPANSION:
5316                         data->val_out = adapter->phy_regs.expansion;
5317                         break;
5318                 case MII_CTRL1000:
5319                         data->val_out = adapter->phy_regs.ctrl1000;
5320                         break;
5321                 case MII_STAT1000:
5322                         data->val_out = adapter->phy_regs.stat1000;
5323                         break;
5324                 case MII_ESTATUS:
5325                         data->val_out = adapter->phy_regs.estatus;
5326                         break;
5327                 default:
5328                         return -EIO;
5329                 }
5330                 break;
5331         case SIOCSMIIREG:
5332         default:
5333                 return -EOPNOTSUPP;
5334         }
5335         return 0;
5336 }
5337
5338 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5339 {
5340         switch (cmd) {
5341         case SIOCGMIIPHY:
5342         case SIOCGMIIREG:
5343         case SIOCSMIIREG:
5344                 return e1000_mii_ioctl(netdev, ifr, cmd);
5345         default:
5346                 return -EOPNOTSUPP;
5347         }
5348 }
5349
5350 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5351 {
5352         struct e1000_hw *hw = &adapter->hw;
5353         u32 i, mac_reg;
5354         u16 phy_reg, wuc_enable;
5355         int retval = 0;
5356
5357         /* copy MAC RARs to PHY RARs */
5358         e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5359
5360         retval = hw->phy.ops.acquire(hw);
5361         if (retval) {
5362                 e_err("Could not acquire PHY\n");
5363                 return retval;
5364         }
5365
5366         /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5367         retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5368         if (retval)
5369                 goto release;
5370
5371         /* copy MAC MTA to PHY MTA - only needed for pchlan */
5372         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5373                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5374                 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5375                                            (u16)(mac_reg & 0xFFFF));
5376                 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5377                                            (u16)((mac_reg >> 16) & 0xFFFF));
5378         }
5379
5380         /* configure PHY Rx Control register */
5381         hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5382         mac_reg = er32(RCTL);
5383         if (mac_reg & E1000_RCTL_UPE)
5384                 phy_reg |= BM_RCTL_UPE;
5385         if (mac_reg & E1000_RCTL_MPE)
5386                 phy_reg |= BM_RCTL_MPE;
5387         phy_reg &= ~(BM_RCTL_MO_MASK);
5388         if (mac_reg & E1000_RCTL_MO_3)
5389                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5390                                 << BM_RCTL_MO_SHIFT);
5391         if (mac_reg & E1000_RCTL_BAM)
5392                 phy_reg |= BM_RCTL_BAM;
5393         if (mac_reg & E1000_RCTL_PMCF)
5394                 phy_reg |= BM_RCTL_PMCF;
5395         mac_reg = er32(CTRL);
5396         if (mac_reg & E1000_CTRL_RFCE)
5397                 phy_reg |= BM_RCTL_RFCE;
5398         hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5399
5400         /* enable PHY wakeup in MAC register */
5401         ew32(WUFC, wufc);
5402         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5403
5404         /* configure and enable PHY wakeup in PHY registers */
5405         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5406         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5407
5408         /* activate PHY wakeup */
5409         wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5410         retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5411         if (retval)
5412                 e_err("Could not set PHY Host Wakeup bit\n");
5413 release:
5414         hw->phy.ops.release(hw);
5415
5416         return retval;
5417 }
5418
5419 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
5420                             bool runtime)
5421 {
5422         struct net_device *netdev = pci_get_drvdata(pdev);
5423         struct e1000_adapter *adapter = netdev_priv(netdev);
5424         struct e1000_hw *hw = &adapter->hw;
5425         u32 ctrl, ctrl_ext, rctl, status;
5426         /* Runtime suspend should only enable wakeup for link changes */
5427         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5428         int retval = 0;
5429
5430         netif_device_detach(netdev);
5431
5432         if (netif_running(netdev)) {
5433                 int count = E1000_CHECK_RESET_COUNT;
5434
5435                 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
5436                         usleep_range(10000, 20000);
5437
5438                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5439                 e1000e_down(adapter);
5440                 e1000_free_irq(adapter);
5441         }
5442         e1000e_reset_interrupt_capability(adapter);
5443
5444         retval = pci_save_state(pdev);
5445         if (retval)
5446                 return retval;
5447
5448         status = er32(STATUS);
5449         if (status & E1000_STATUS_LU)
5450                 wufc &= ~E1000_WUFC_LNKC;
5451
5452         if (wufc) {
5453                 e1000_setup_rctl(adapter);
5454                 e1000e_set_rx_mode(netdev);
5455
5456                 /* turn on all-multi mode if wake on multicast is enabled */
5457                 if (wufc & E1000_WUFC_MC) {
5458                         rctl = er32(RCTL);
5459                         rctl |= E1000_RCTL_MPE;
5460                         ew32(RCTL, rctl);
5461                 }
5462
5463                 ctrl = er32(CTRL);
5464                 /* advertise wake from D3Cold */
5465                 #define E1000_CTRL_ADVD3WUC 0x00100000
5466                 /* phy power management enable */
5467                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5468                 ctrl |= E1000_CTRL_ADVD3WUC;
5469                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5470                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5471                 ew32(CTRL, ctrl);
5472
5473                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5474                     adapter->hw.phy.media_type ==
5475                     e1000_media_type_internal_serdes) {
5476                         /* keep the laser running in D3 */
5477                         ctrl_ext = er32(CTRL_EXT);
5478                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5479                         ew32(CTRL_EXT, ctrl_ext);
5480                 }
5481
5482                 if (adapter->flags & FLAG_IS_ICH)
5483                         e1000_suspend_workarounds_ich8lan(&adapter->hw);
5484
5485                 /* Allow time for pending master requests to run */
5486                 e1000e_disable_pcie_master(&adapter->hw);
5487
5488                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5489                         /* enable wakeup by the PHY */
5490                         retval = e1000_init_phy_wakeup(adapter, wufc);
5491                         if (retval)
5492                                 return retval;
5493                 } else {
5494                         /* enable wakeup by the MAC */
5495                         ew32(WUFC, wufc);
5496                         ew32(WUC, E1000_WUC_PME_EN);
5497                 }
5498         } else {
5499                 ew32(WUC, 0);
5500                 ew32(WUFC, 0);
5501         }
5502
5503         *enable_wake = !!wufc;
5504
5505         /* make sure adapter isn't asleep if manageability is enabled */
5506         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
5507             (hw->mac.ops.check_mng_mode(hw)))
5508                 *enable_wake = true;
5509
5510         if (adapter->hw.phy.type == e1000_phy_igp_3)
5511                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5512
5513         /*
5514          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5515          * would have already happened in close and is redundant.
5516          */
5517         e1000e_release_hw_control(adapter);
5518
5519         pci_disable_device(pdev);
5520
5521         return 0;
5522 }
5523
5524 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
5525 {
5526         if (sleep && wake) {
5527                 pci_prepare_to_sleep(pdev);
5528                 return;
5529         }
5530
5531         pci_wake_from_d3(pdev, wake);
5532         pci_set_power_state(pdev, PCI_D3hot);
5533 }
5534
5535 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
5536                                     bool wake)
5537 {
5538         struct net_device *netdev = pci_get_drvdata(pdev);
5539         struct e1000_adapter *adapter = netdev_priv(netdev);
5540
5541         /*
5542          * The pci-e switch on some quad port adapters will report a
5543          * correctable error when the MAC transitions from D0 to D3.  To
5544          * prevent this we need to mask off the correctable errors on the
5545          * downstream port of the pci-e switch.
5546          */
5547         if (adapter->flags & FLAG_IS_QUAD_PORT) {
5548                 struct pci_dev *us_dev = pdev->bus->self;
5549                 int pos = pci_pcie_cap(us_dev);
5550                 u16 devctl;
5551
5552                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
5553                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
5554                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
5555
5556                 e1000_power_off(pdev, sleep, wake);
5557
5558                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
5559         } else {
5560                 e1000_power_off(pdev, sleep, wake);
5561         }
5562 }
5563
5564 #ifdef CONFIG_PCIEASPM
5565 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5566 {
5567         pci_disable_link_state_locked(pdev, state);
5568 }
5569 #else
5570 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5571 {
5572         int pos;
5573         u16 reg16;
5574
5575         /*
5576          * Both device and parent should have the same ASPM setting.
5577          * Disable ASPM in downstream component first and then upstream.
5578          */
5579         pos = pci_pcie_cap(pdev);
5580         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
5581         reg16 &= ~state;
5582         pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16);
5583
5584         if (!pdev->bus->self)
5585                 return;
5586
5587         pos = pci_pcie_cap(pdev->bus->self);
5588         pci_read_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, &reg16);
5589         reg16 &= ~state;
5590         pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16);
5591 }
5592 #endif
5593 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5594 {
5595         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
5596                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
5597                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
5598
5599         __e1000e_disable_aspm(pdev, state);
5600 }
5601
5602 #ifdef CONFIG_PM
5603 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
5604 {
5605         return !!adapter->tx_ring->buffer_info;
5606 }
5607
5608 static int __e1000_resume(struct pci_dev *pdev)
5609 {
5610         struct net_device *netdev = pci_get_drvdata(pdev);
5611         struct e1000_adapter *adapter = netdev_priv(netdev);
5612         struct e1000_hw *hw = &adapter->hw;
5613         u16 aspm_disable_flag = 0;
5614         u32 err;
5615
5616         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5617                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5618         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5619                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5620         if (aspm_disable_flag)
5621                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5622
5623         pci_set_power_state(pdev, PCI_D0);
5624         pci_restore_state(pdev);
5625         pci_save_state(pdev);
5626
5627         e1000e_set_interrupt_capability(adapter);
5628         if (netif_running(netdev)) {
5629                 err = e1000_request_irq(adapter);
5630                 if (err)
5631                         return err;
5632         }
5633
5634         if (hw->mac.type >= e1000_pch2lan)
5635                 e1000_resume_workarounds_pchlan(&adapter->hw);
5636
5637         e1000e_power_up_phy(adapter);
5638
5639         /* report the system wakeup cause from S3/S4 */
5640         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5641                 u16 phy_data;
5642
5643                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
5644                 if (phy_data) {
5645                         e_info("PHY Wakeup cause - %s\n",
5646                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
5647                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
5648                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
5649                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
5650                                 phy_data & E1000_WUS_LNKC ?
5651                                 "Link Status Change" : "other");
5652                 }
5653                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
5654         } else {
5655                 u32 wus = er32(WUS);
5656                 if (wus) {
5657                         e_info("MAC Wakeup cause - %s\n",
5658                                 wus & E1000_WUS_EX ? "Unicast Packet" :
5659                                 wus & E1000_WUS_MC ? "Multicast Packet" :
5660                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
5661                                 wus & E1000_WUS_MAG ? "Magic Packet" :
5662                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
5663                                 "other");
5664                 }
5665                 ew32(WUS, ~0);
5666         }
5667
5668         e1000e_reset(adapter);
5669
5670         e1000_init_manageability_pt(adapter);
5671
5672         if (netif_running(netdev))
5673                 e1000e_up(adapter);
5674
5675         netif_device_attach(netdev);
5676
5677         /*
5678          * If the controller has AMT, do not set DRV_LOAD until the interface
5679          * is up.  For all other cases, let the f/w know that the h/w is now
5680          * under the control of the driver.
5681          */
5682         if (!(adapter->flags & FLAG_HAS_AMT))
5683                 e1000e_get_hw_control(adapter);
5684
5685         return 0;
5686 }
5687
5688 #ifdef CONFIG_PM_SLEEP
5689 static int e1000_suspend(struct device *dev)
5690 {
5691         struct pci_dev *pdev = to_pci_dev(dev);
5692         int retval;
5693         bool wake;
5694
5695         retval = __e1000_shutdown(pdev, &wake, false);
5696         if (!retval)
5697                 e1000_complete_shutdown(pdev, true, wake);
5698
5699         return retval;
5700 }
5701
5702 static int e1000_resume(struct device *dev)
5703 {
5704         struct pci_dev *pdev = to_pci_dev(dev);
5705         struct net_device *netdev = pci_get_drvdata(pdev);
5706         struct e1000_adapter *adapter = netdev_priv(netdev);
5707
5708         if (e1000e_pm_ready(adapter))
5709                 adapter->idle_check = true;
5710
5711         return __e1000_resume(pdev);
5712 }
5713 #endif /* CONFIG_PM_SLEEP */
5714
5715 #ifdef CONFIG_PM_RUNTIME
5716 static int e1000_runtime_suspend(struct device *dev)
5717 {
5718         struct pci_dev *pdev = to_pci_dev(dev);
5719         struct net_device *netdev = pci_get_drvdata(pdev);
5720         struct e1000_adapter *adapter = netdev_priv(netdev);
5721
5722         if (e1000e_pm_ready(adapter)) {
5723                 bool wake;
5724
5725                 __e1000_shutdown(pdev, &wake, true);
5726         }
5727
5728         return 0;
5729 }
5730
5731 static int e1000_idle(struct device *dev)
5732 {
5733         struct pci_dev *pdev = to_pci_dev(dev);
5734         struct net_device *netdev = pci_get_drvdata(pdev);
5735         struct e1000_adapter *adapter = netdev_priv(netdev);
5736
5737         if (!e1000e_pm_ready(adapter))
5738                 return 0;
5739
5740         if (adapter->idle_check) {
5741                 adapter->idle_check = false;
5742                 if (!e1000e_has_link(adapter))
5743                         pm_schedule_suspend(dev, MSEC_PER_SEC);
5744         }
5745
5746         return -EBUSY;
5747 }
5748
5749 static int e1000_runtime_resume(struct device *dev)
5750 {
5751         struct pci_dev *pdev = to_pci_dev(dev);
5752         struct net_device *netdev = pci_get_drvdata(pdev);
5753         struct e1000_adapter *adapter = netdev_priv(netdev);
5754
5755         if (!e1000e_pm_ready(adapter))
5756                 return 0;
5757
5758         adapter->idle_check = !dev->power.runtime_auto;
5759         return __e1000_resume(pdev);
5760 }
5761 #endif /* CONFIG_PM_RUNTIME */
5762 #endif /* CONFIG_PM */
5763
5764 static void e1000_shutdown(struct pci_dev *pdev)
5765 {
5766         bool wake = false;
5767
5768         __e1000_shutdown(pdev, &wake, false);
5769
5770         if (system_state == SYSTEM_POWER_OFF)
5771                 e1000_complete_shutdown(pdev, false, wake);
5772 }
5773
5774 #ifdef CONFIG_NET_POLL_CONTROLLER
5775
5776 static irqreturn_t e1000_intr_msix(int irq, void *data)
5777 {
5778         struct net_device *netdev = data;
5779         struct e1000_adapter *adapter = netdev_priv(netdev);
5780
5781         if (adapter->msix_entries) {
5782                 int vector, msix_irq;
5783
5784                 vector = 0;
5785                 msix_irq = adapter->msix_entries[vector].vector;
5786                 disable_irq(msix_irq);
5787                 e1000_intr_msix_rx(msix_irq, netdev);
5788                 enable_irq(msix_irq);
5789
5790                 vector++;
5791                 msix_irq = adapter->msix_entries[vector].vector;
5792                 disable_irq(msix_irq);
5793                 e1000_intr_msix_tx(msix_irq, netdev);
5794                 enable_irq(msix_irq);
5795
5796                 vector++;
5797                 msix_irq = adapter->msix_entries[vector].vector;
5798                 disable_irq(msix_irq);
5799                 e1000_msix_other(msix_irq, netdev);
5800                 enable_irq(msix_irq);
5801         }
5802
5803         return IRQ_HANDLED;
5804 }
5805
5806 /*
5807  * Polling 'interrupt' - used by things like netconsole to send skbs
5808  * without having to re-enable interrupts. It's not called while
5809  * the interrupt routine is executing.
5810  */
5811 static void e1000_netpoll(struct net_device *netdev)
5812 {
5813         struct e1000_adapter *adapter = netdev_priv(netdev);
5814
5815         switch (adapter->int_mode) {
5816         case E1000E_INT_MODE_MSIX:
5817                 e1000_intr_msix(adapter->pdev->irq, netdev);
5818                 break;
5819         case E1000E_INT_MODE_MSI:
5820                 disable_irq(adapter->pdev->irq);
5821                 e1000_intr_msi(adapter->pdev->irq, netdev);
5822                 enable_irq(adapter->pdev->irq);
5823                 break;
5824         default: /* E1000E_INT_MODE_LEGACY */
5825                 disable_irq(adapter->pdev->irq);
5826                 e1000_intr(adapter->pdev->irq, netdev);
5827                 enable_irq(adapter->pdev->irq);
5828                 break;
5829         }
5830 }
5831 #endif
5832
5833 /**
5834  * e1000_io_error_detected - called when PCI error is detected
5835  * @pdev: Pointer to PCI device
5836  * @state: The current pci connection state
5837  *
5838  * This function is called after a PCI bus error affecting
5839  * this device has been detected.
5840  */
5841 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5842                                                 pci_channel_state_t state)
5843 {
5844         struct net_device *netdev = pci_get_drvdata(pdev);
5845         struct e1000_adapter *adapter = netdev_priv(netdev);
5846
5847         netif_device_detach(netdev);
5848
5849         if (state == pci_channel_io_perm_failure)
5850                 return PCI_ERS_RESULT_DISCONNECT;
5851
5852         if (netif_running(netdev))
5853                 e1000e_down(adapter);
5854         pci_disable_device(pdev);
5855
5856         /* Request a slot slot reset. */
5857         return PCI_ERS_RESULT_NEED_RESET;
5858 }
5859
5860 /**
5861  * e1000_io_slot_reset - called after the pci bus has been reset.
5862  * @pdev: Pointer to PCI device
5863  *
5864  * Restart the card from scratch, as if from a cold-boot. Implementation
5865  * resembles the first-half of the e1000_resume routine.
5866  */
5867 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5868 {
5869         struct net_device *netdev = pci_get_drvdata(pdev);
5870         struct e1000_adapter *adapter = netdev_priv(netdev);
5871         struct e1000_hw *hw = &adapter->hw;
5872         u16 aspm_disable_flag = 0;
5873         int err;
5874         pci_ers_result_t result;
5875
5876         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5877                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5878         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5879                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5880         if (aspm_disable_flag)
5881                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5882
5883         err = pci_enable_device_mem(pdev);
5884         if (err) {
5885                 dev_err(&pdev->dev,
5886                         "Cannot re-enable PCI device after reset.\n");
5887                 result = PCI_ERS_RESULT_DISCONNECT;
5888         } else {
5889                 pci_set_master(pdev);
5890                 pdev->state_saved = true;
5891                 pci_restore_state(pdev);
5892
5893                 pci_enable_wake(pdev, PCI_D3hot, 0);
5894                 pci_enable_wake(pdev, PCI_D3cold, 0);
5895
5896                 e1000e_reset(adapter);
5897                 ew32(WUS, ~0);
5898                 result = PCI_ERS_RESULT_RECOVERED;
5899         }
5900
5901         pci_cleanup_aer_uncorrect_error_status(pdev);
5902
5903         return result;
5904 }
5905
5906 /**
5907  * e1000_io_resume - called when traffic can start flowing again.
5908  * @pdev: Pointer to PCI device
5909  *
5910  * This callback is called when the error recovery driver tells us that
5911  * its OK to resume normal operation. Implementation resembles the
5912  * second-half of the e1000_resume routine.
5913  */
5914 static void e1000_io_resume(struct pci_dev *pdev)
5915 {
5916         struct net_device *netdev = pci_get_drvdata(pdev);
5917         struct e1000_adapter *adapter = netdev_priv(netdev);
5918
5919         e1000_init_manageability_pt(adapter);
5920
5921         if (netif_running(netdev)) {
5922                 if (e1000e_up(adapter)) {
5923                         dev_err(&pdev->dev,
5924                                 "can't bring device back up after reset\n");
5925                         return;
5926                 }
5927         }
5928
5929         netif_device_attach(netdev);
5930
5931         /*
5932          * If the controller has AMT, do not set DRV_LOAD until the interface
5933          * is up.  For all other cases, let the f/w know that the h/w is now
5934          * under the control of the driver.
5935          */
5936         if (!(adapter->flags & FLAG_HAS_AMT))
5937                 e1000e_get_hw_control(adapter);
5938
5939 }
5940
5941 static void e1000_print_device_info(struct e1000_adapter *adapter)
5942 {
5943         struct e1000_hw *hw = &adapter->hw;
5944         struct net_device *netdev = adapter->netdev;
5945         u32 ret_val;
5946         u8 pba_str[E1000_PBANUM_LENGTH];
5947
5948         /* print bus type/speed/width info */
5949         e_info("(PCI Express:2.5GT/s:%s) %pM\n",
5950                /* bus width */
5951                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
5952                 "Width x1"),
5953                /* MAC address */
5954                netdev->dev_addr);
5955         e_info("Intel(R) PRO/%s Network Connection\n",
5956                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
5957         ret_val = e1000_read_pba_string_generic(hw, pba_str,
5958                                                 E1000_PBANUM_LENGTH);
5959         if (ret_val)
5960                 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
5961         e_info("MAC: %d, PHY: %d, PBA No: %s\n",
5962                hw->mac.type, hw->phy.type, pba_str);
5963 }
5964
5965 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
5966 {
5967         struct e1000_hw *hw = &adapter->hw;
5968         int ret_val;
5969         u16 buf = 0;
5970
5971         if (hw->mac.type != e1000_82573)
5972                 return;
5973
5974         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
5975         le16_to_cpus(&buf);
5976         if (!ret_val && (!(buf & (1 << 0)))) {
5977                 /* Deep Smart Power Down (DSPD) */
5978                 dev_warn(&adapter->pdev->dev,
5979                          "Warning: detected DSPD enabled in EEPROM\n");
5980         }
5981 }
5982
5983 static int e1000_set_features(struct net_device *netdev,
5984                               netdev_features_t features)
5985 {
5986         struct e1000_adapter *adapter = netdev_priv(netdev);
5987         netdev_features_t changed = features ^ netdev->features;
5988
5989         if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
5990                 adapter->flags |= FLAG_TSO_FORCE;
5991
5992         if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
5993                          NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
5994                          NETIF_F_RXALL)))
5995                 return 0;
5996
5997         if (changed & NETIF_F_RXFCS) {
5998                 if (features & NETIF_F_RXFCS) {
5999                         adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6000                 } else {
6001                         /* We need to take it back to defaults, which might mean
6002                          * stripping is still disabled at the adapter level.
6003                          */
6004                         if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6005                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6006                         else
6007                                 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6008                 }
6009         }
6010
6011         netdev->features = features;
6012
6013         if (netif_running(netdev))
6014                 e1000e_reinit_locked(adapter);
6015         else
6016                 e1000e_reset(adapter);
6017
6018         return 0;
6019 }
6020
6021 static const struct net_device_ops e1000e_netdev_ops = {
6022         .ndo_open               = e1000_open,
6023         .ndo_stop               = e1000_close,
6024         .ndo_start_xmit         = e1000_xmit_frame,
6025         .ndo_get_stats64        = e1000e_get_stats64,
6026         .ndo_set_rx_mode        = e1000e_set_rx_mode,
6027         .ndo_set_mac_address    = e1000_set_mac,
6028         .ndo_change_mtu         = e1000_change_mtu,
6029         .ndo_do_ioctl           = e1000_ioctl,
6030         .ndo_tx_timeout         = e1000_tx_timeout,
6031         .ndo_validate_addr      = eth_validate_addr,
6032
6033         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
6034         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
6035 #ifdef CONFIG_NET_POLL_CONTROLLER
6036         .ndo_poll_controller    = e1000_netpoll,
6037 #endif
6038         .ndo_set_features = e1000_set_features,
6039 };
6040
6041 /**
6042  * e1000_probe - Device Initialization Routine
6043  * @pdev: PCI device information struct
6044  * @ent: entry in e1000_pci_tbl
6045  *
6046  * Returns 0 on success, negative on failure
6047  *
6048  * e1000_probe initializes an adapter identified by a pci_dev structure.
6049  * The OS initialization, configuring of the adapter private structure,
6050  * and a hardware reset occur.
6051  **/
6052 static int __devinit e1000_probe(struct pci_dev *pdev,
6053                                  const struct pci_device_id *ent)
6054 {
6055         struct net_device *netdev;
6056         struct e1000_adapter *adapter;
6057         struct e1000_hw *hw;
6058         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
6059         resource_size_t mmio_start, mmio_len;
6060         resource_size_t flash_start, flash_len;
6061         static int cards_found;
6062         u16 aspm_disable_flag = 0;
6063         int i, err, pci_using_dac;
6064         u16 eeprom_data = 0;
6065         u16 eeprom_apme_mask = E1000_EEPROM_APME;
6066
6067         if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6068                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6069         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
6070                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6071         if (aspm_disable_flag)
6072                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6073
6074         err = pci_enable_device_mem(pdev);
6075         if (err)
6076                 return err;
6077
6078         pci_using_dac = 0;
6079         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
6080         if (!err) {
6081                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
6082                 if (!err)
6083                         pci_using_dac = 1;
6084         } else {
6085                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6086                 if (err) {
6087                         err = dma_set_coherent_mask(&pdev->dev,
6088                                                     DMA_BIT_MASK(32));
6089                         if (err) {
6090                                 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
6091                                 goto err_dma;
6092                         }
6093                 }
6094         }
6095
6096         err = pci_request_selected_regions_exclusive(pdev,
6097                                           pci_select_bars(pdev, IORESOURCE_MEM),
6098                                           e1000e_driver_name);
6099         if (err)
6100                 goto err_pci_reg;
6101
6102         /* AER (Advanced Error Reporting) hooks */
6103         pci_enable_pcie_error_reporting(pdev);
6104
6105         pci_set_master(pdev);
6106         /* PCI config space info */
6107         err = pci_save_state(pdev);
6108         if (err)
6109                 goto err_alloc_etherdev;
6110
6111         err = -ENOMEM;
6112         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6113         if (!netdev)
6114                 goto err_alloc_etherdev;
6115
6116         SET_NETDEV_DEV(netdev, &pdev->dev);
6117
6118         netdev->irq = pdev->irq;
6119
6120         pci_set_drvdata(pdev, netdev);
6121         adapter = netdev_priv(netdev);
6122         hw = &adapter->hw;
6123         adapter->netdev = netdev;
6124         adapter->pdev = pdev;
6125         adapter->ei = ei;
6126         adapter->pba = ei->pba;
6127         adapter->flags = ei->flags;
6128         adapter->flags2 = ei->flags2;
6129         adapter->hw.adapter = adapter;
6130         adapter->hw.mac.type = ei->mac;
6131         adapter->max_hw_frame_size = ei->max_hw_frame_size;
6132         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
6133
6134         mmio_start = pci_resource_start(pdev, 0);
6135         mmio_len = pci_resource_len(pdev, 0);
6136
6137         err = -EIO;
6138         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6139         if (!adapter->hw.hw_addr)
6140                 goto err_ioremap;
6141
6142         if ((adapter->flags & FLAG_HAS_FLASH) &&
6143             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6144                 flash_start = pci_resource_start(pdev, 1);
6145                 flash_len = pci_resource_len(pdev, 1);
6146                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6147                 if (!adapter->hw.flash_address)
6148                         goto err_flashmap;
6149         }
6150
6151         /* construct the net_device struct */
6152         netdev->netdev_ops              = &e1000e_netdev_ops;
6153         e1000e_set_ethtool_ops(netdev);
6154         netdev->watchdog_timeo          = 5 * HZ;
6155         netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
6156         strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
6157
6158         netdev->mem_start = mmio_start;
6159         netdev->mem_end = mmio_start + mmio_len;
6160
6161         adapter->bd_number = cards_found++;
6162
6163         e1000e_check_options(adapter);
6164
6165         /* setup adapter struct */
6166         err = e1000_sw_init(adapter);
6167         if (err)
6168                 goto err_sw_init;
6169
6170         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6171         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6172         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6173
6174         err = ei->get_variants(adapter);
6175         if (err)
6176                 goto err_hw_init;
6177
6178         if ((adapter->flags & FLAG_IS_ICH) &&
6179             (adapter->flags & FLAG_READ_ONLY_NVM))
6180                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6181
6182         hw->mac.ops.get_bus_info(&adapter->hw);
6183
6184         adapter->hw.phy.autoneg_wait_to_complete = 0;
6185
6186         /* Copper options */
6187         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6188                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6189                 adapter->hw.phy.disable_polarity_correction = 0;
6190                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6191         }
6192
6193         if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
6194                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
6195
6196         /* Set initial default active device features */
6197         netdev->features = (NETIF_F_SG |
6198                             NETIF_F_HW_VLAN_RX |
6199                             NETIF_F_HW_VLAN_TX |
6200                             NETIF_F_TSO |
6201                             NETIF_F_TSO6 |
6202                             NETIF_F_RXHASH |
6203                             NETIF_F_RXCSUM |
6204                             NETIF_F_HW_CSUM);
6205
6206         /* Set user-changeable features (subset of all device features) */
6207         netdev->hw_features = netdev->features;
6208         netdev->hw_features |= NETIF_F_RXFCS;
6209         netdev->priv_flags |= IFF_SUPP_NOFCS;
6210         netdev->hw_features |= NETIF_F_RXALL;
6211
6212         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6213                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
6214
6215         netdev->vlan_features |= (NETIF_F_SG |
6216                                   NETIF_F_TSO |
6217                                   NETIF_F_TSO6 |
6218                                   NETIF_F_HW_CSUM);
6219
6220         netdev->priv_flags |= IFF_UNICAST_FLT;
6221
6222         if (pci_using_dac) {
6223                 netdev->features |= NETIF_F_HIGHDMA;
6224                 netdev->vlan_features |= NETIF_F_HIGHDMA;
6225         }
6226
6227         if (e1000e_enable_mng_pass_thru(&adapter->hw))
6228                 adapter->flags |= FLAG_MNG_PT_ENABLED;
6229
6230         /*
6231          * before reading the NVM, reset the controller to
6232          * put the device in a known good starting state
6233          */
6234         adapter->hw.mac.ops.reset_hw(&adapter->hw);
6235
6236         /*
6237          * systems with ASPM and others may see the checksum fail on the first
6238          * attempt. Let's give it a few tries
6239          */
6240         for (i = 0;; i++) {
6241                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6242                         break;
6243                 if (i == 2) {
6244                         e_err("The NVM Checksum Is Not Valid\n");
6245                         err = -EIO;
6246                         goto err_eeprom;
6247                 }
6248         }
6249
6250         e1000_eeprom_checks(adapter);
6251
6252         /* copy the MAC address */
6253         if (e1000e_read_mac_addr(&adapter->hw))
6254                 e_err("NVM Read Error while reading MAC address\n");
6255
6256         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6257         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
6258
6259         if (!is_valid_ether_addr(netdev->perm_addr)) {
6260                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
6261                 err = -EIO;
6262                 goto err_eeprom;
6263         }
6264
6265         init_timer(&adapter->watchdog_timer);
6266         adapter->watchdog_timer.function = e1000_watchdog;
6267         adapter->watchdog_timer.data = (unsigned long) adapter;
6268
6269         init_timer(&adapter->phy_info_timer);
6270         adapter->phy_info_timer.function = e1000_update_phy_info;
6271         adapter->phy_info_timer.data = (unsigned long) adapter;
6272
6273         INIT_WORK(&adapter->reset_task, e1000_reset_task);
6274         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6275         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6276         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6277         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6278
6279         /* Initialize link parameters. User can change them with ethtool */
6280         adapter->hw.mac.autoneg = 1;
6281         adapter->fc_autoneg = true;
6282         adapter->hw.fc.requested_mode = e1000_fc_default;
6283         adapter->hw.fc.current_mode = e1000_fc_default;
6284         adapter->hw.phy.autoneg_advertised = 0x2f;
6285
6286         /* ring size defaults */
6287         adapter->rx_ring->count = 256;
6288         adapter->tx_ring->count = 256;
6289
6290         /*
6291          * Initial Wake on LAN setting - If APM wake is enabled in
6292          * the EEPROM, enable the ACPI Magic Packet filter
6293          */
6294         if (adapter->flags & FLAG_APME_IN_WUC) {
6295                 /* APME bit in EEPROM is mapped to WUC.APME */
6296                 eeprom_data = er32(WUC);
6297                 eeprom_apme_mask = E1000_WUC_APME;
6298                 if ((hw->mac.type > e1000_ich10lan) &&
6299                     (eeprom_data & E1000_WUC_PHY_WAKE))
6300                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6301         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6302                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6303                     (adapter->hw.bus.func == 1))
6304                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B,
6305                                        1, &eeprom_data);
6306                 else
6307                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A,
6308                                        1, &eeprom_data);
6309         }
6310
6311         /* fetch WoL from EEPROM */
6312         if (eeprom_data & eeprom_apme_mask)
6313                 adapter->eeprom_wol |= E1000_WUFC_MAG;
6314
6315         /*
6316          * now that we have the eeprom settings, apply the special cases
6317          * where the eeprom may be wrong or the board simply won't support
6318          * wake on lan on a particular port
6319          */
6320         if (!(adapter->flags & FLAG_HAS_WOL))
6321                 adapter->eeprom_wol = 0;
6322
6323         /* initialize the wol settings based on the eeprom settings */
6324         adapter->wol = adapter->eeprom_wol;
6325         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6326
6327         /* save off EEPROM version number */
6328         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6329
6330         /* reset the hardware with the new settings */
6331         e1000e_reset(adapter);
6332
6333         /*
6334          * If the controller has AMT, do not set DRV_LOAD until the interface
6335          * is up.  For all other cases, let the f/w know that the h/w is now
6336          * under the control of the driver.
6337          */
6338         if (!(adapter->flags & FLAG_HAS_AMT))
6339                 e1000e_get_hw_control(adapter);
6340
6341         strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
6342         err = register_netdev(netdev);
6343         if (err)
6344                 goto err_register;
6345
6346         /* carrier off reporting is important to ethtool even BEFORE open */
6347         netif_carrier_off(netdev);
6348
6349         e1000_print_device_info(adapter);
6350
6351         if (pci_dev_run_wake(pdev))
6352                 pm_runtime_put_noidle(&pdev->dev);
6353
6354         return 0;
6355
6356 err_register:
6357         if (!(adapter->flags & FLAG_HAS_AMT))
6358                 e1000e_release_hw_control(adapter);
6359 err_eeprom:
6360         if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
6361                 e1000_phy_hw_reset(&adapter->hw);
6362 err_hw_init:
6363         kfree(adapter->tx_ring);
6364         kfree(adapter->rx_ring);
6365 err_sw_init:
6366         if (adapter->hw.flash_address)
6367                 iounmap(adapter->hw.flash_address);
6368         e1000e_reset_interrupt_capability(adapter);
6369 err_flashmap:
6370         iounmap(adapter->hw.hw_addr);
6371 err_ioremap:
6372         free_netdev(netdev);
6373 err_alloc_etherdev:
6374         pci_release_selected_regions(pdev,
6375                                      pci_select_bars(pdev, IORESOURCE_MEM));
6376 err_pci_reg:
6377 err_dma:
6378         pci_disable_device(pdev);
6379         return err;
6380 }
6381
6382 /**
6383  * e1000_remove - Device Removal Routine
6384  * @pdev: PCI device information struct
6385  *
6386  * e1000_remove is called by the PCI subsystem to alert the driver
6387  * that it should release a PCI device.  The could be caused by a
6388  * Hot-Plug event, or because the driver is going to be removed from
6389  * memory.
6390  **/
6391 static void __devexit e1000_remove(struct pci_dev *pdev)
6392 {
6393         struct net_device *netdev = pci_get_drvdata(pdev);
6394         struct e1000_adapter *adapter = netdev_priv(netdev);
6395         bool down = test_bit(__E1000_DOWN, &adapter->state);
6396
6397         /*
6398          * The timers may be rescheduled, so explicitly disable them
6399          * from being rescheduled.
6400          */
6401         if (!down)
6402                 set_bit(__E1000_DOWN, &adapter->state);
6403         del_timer_sync(&adapter->watchdog_timer);
6404         del_timer_sync(&adapter->phy_info_timer);
6405
6406         cancel_work_sync(&adapter->reset_task);
6407         cancel_work_sync(&adapter->watchdog_task);
6408         cancel_work_sync(&adapter->downshift_task);
6409         cancel_work_sync(&adapter->update_phy_task);
6410         cancel_work_sync(&adapter->print_hang_task);
6411
6412         if (!(netdev->flags & IFF_UP))
6413                 e1000_power_down_phy(adapter);
6414
6415         /* Don't lie to e1000_close() down the road. */
6416         if (!down)
6417                 clear_bit(__E1000_DOWN, &adapter->state);
6418         unregister_netdev(netdev);
6419
6420         if (pci_dev_run_wake(pdev))
6421                 pm_runtime_get_noresume(&pdev->dev);
6422
6423         /*
6424          * Release control of h/w to f/w.  If f/w is AMT enabled, this
6425          * would have already happened in close and is redundant.
6426          */
6427         e1000e_release_hw_control(adapter);
6428
6429         e1000e_reset_interrupt_capability(adapter);
6430         kfree(adapter->tx_ring);
6431         kfree(adapter->rx_ring);
6432
6433         iounmap(adapter->hw.hw_addr);
6434         if (adapter->hw.flash_address)
6435                 iounmap(adapter->hw.flash_address);
6436         pci_release_selected_regions(pdev,
6437                                      pci_select_bars(pdev, IORESOURCE_MEM));
6438
6439         free_netdev(netdev);
6440
6441         /* AER disable */
6442         pci_disable_pcie_error_reporting(pdev);
6443
6444         pci_disable_device(pdev);
6445 }
6446
6447 /* PCI Error Recovery (ERS) */
6448 static struct pci_error_handlers e1000_err_handler = {
6449         .error_detected = e1000_io_error_detected,
6450         .slot_reset = e1000_io_slot_reset,
6451         .resume = e1000_io_resume,
6452 };
6453
6454 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6455         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6456         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6457         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6458         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
6459         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6460         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6461         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6462         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6463         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6464
6465         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6466         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6467         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6468         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6469
6470         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6471         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6472         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6473
6474         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6475         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6476         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6477
6478         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6479           board_80003es2lan },
6480         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6481           board_80003es2lan },
6482         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6483           board_80003es2lan },
6484         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6485           board_80003es2lan },
6486
6487         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6488         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6489         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6490         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6491         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6492         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6493         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6494         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6495
6496         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6497         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6498         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6499         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6500         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6501         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6502         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6503         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6504         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6505
6506         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6507         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6508         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6509
6510         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6511         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6512         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6513
6514         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6515         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6516         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
6517         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
6518
6519         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
6520         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
6521
6522         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
6523         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
6524
6525         { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
6526 };
6527 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
6528
6529 #ifdef CONFIG_PM
6530 static const struct dev_pm_ops e1000_pm_ops = {
6531         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
6532         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
6533                                 e1000_runtime_resume, e1000_idle)
6534 };
6535 #endif
6536
6537 /* PCI Device API Driver */
6538 static struct pci_driver e1000_driver = {
6539         .name     = e1000e_driver_name,
6540         .id_table = e1000_pci_tbl,
6541         .probe    = e1000_probe,
6542         .remove   = __devexit_p(e1000_remove),
6543 #ifdef CONFIG_PM
6544         .driver   = {
6545                 .pm = &e1000_pm_ops,
6546         },
6547 #endif
6548         .shutdown = e1000_shutdown,
6549         .err_handler = &e1000_err_handler
6550 };
6551
6552 /**
6553  * e1000_init_module - Driver Registration Routine
6554  *
6555  * e1000_init_module is the first routine called when the driver is
6556  * loaded. All it does is register with the PCI subsystem.
6557  **/
6558 static int __init e1000_init_module(void)
6559 {
6560         int ret;
6561         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
6562                 e1000e_driver_version);
6563         pr_info("Copyright(c) 1999 - 2012 Intel Corporation.\n");
6564         ret = pci_register_driver(&e1000_driver);
6565
6566         return ret;
6567 }
6568 module_init(e1000_init_module);
6569
6570 /**
6571  * e1000_exit_module - Driver Exit Cleanup Routine
6572  *
6573  * e1000_exit_module is called just before the driver is removed
6574  * from memory.
6575  **/
6576 static void __exit e1000_exit_module(void)
6577 {
6578         pci_unregister_driver(&e1000_driver);
6579 }
6580 module_exit(e1000_exit_module);
6581
6582
6583 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
6584 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
6585 MODULE_LICENSE("GPL");
6586 MODULE_VERSION(DRV_VERSION);
6587
6588 /* netdev.c */