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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2011 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 "1.5.1" DRV_EXTRAVERSION
  60 char e1000e_driver_name[] = "e1000e";
  61 const char e1000e_driver_version[] = DRV_VERSION;
  62
  63 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
  64
  65 static const struct e1000_info *e1000_info_tbl[] = {
  66         [board_82571]           = &e1000_82571_info,
  67         [board_82572]           = &e1000_82572_info,
  68         [board_82573]           = &e1000_82573_info,
  69         [board_82574]           = &e1000_82574_info,
  70         [board_82583]           = &e1000_82583_info,
  71         [board_80003es2lan]     = &e1000_es2_info,
  72         [board_ich8lan]         = &e1000_ich8_info,
  73         [board_ich9lan]         = &e1000_ich9_info,
  74         [board_ich10lan]        = &e1000_ich10_info,
  75         [board_pchlan]          = &e1000_pch_info,
  76         [board_pch2lan]         = &e1000_pch2_info,
  77 };
  78
  79 struct e1000_reg_info {
  80         u32 ofs;
  81         char *name;
  82 };
  83
  84 #define E1000_RDFH      0x02410 /* Rx Data FIFO Head - RW */
  85 #define E1000_RDFT      0x02418 /* Rx Data FIFO Tail - RW */
  86 #define E1000_RDFHS     0x02420 /* Rx Data FIFO Head Saved - RW */
  87 #define E1000_RDFTS     0x02428 /* Rx Data FIFO Tail Saved - RW */
  88 #define E1000_RDFPC     0x02430 /* Rx Data FIFO Packet Count - RW */
  89
  90 #define E1000_TDFH      0x03410 /* Tx Data FIFO Head - RW */
  91 #define E1000_TDFT      0x03418 /* Tx Data FIFO Tail - RW */
  92 #define E1000_TDFHS     0x03420 /* Tx Data FIFO Head Saved - RW */
  93 #define E1000_TDFTS     0x03428 /* Tx Data FIFO Tail Saved - RW */
  94 #define E1000_TDFPC     0x03430 /* Tx Data FIFO Packet Count - RW */
  95
  96 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
  97
  98         /* General Registers */
  99         {E1000_CTRL, "CTRL"},
 100         {E1000_STATUS, "STATUS"},
 101         {E1000_CTRL_EXT, "CTRL_EXT"},
 102
 103         /* Interrupt Registers */
 104         {E1000_ICR, "ICR"},
 105
 106         /* Rx Registers */
 107         {E1000_RCTL, "RCTL"},
 108         {E1000_RDLEN, "RDLEN"},
 109         {E1000_RDH, "RDH"},
 110         {E1000_RDT, "RDT"},
 111         {E1000_RDTR, "RDTR"},
 112         {E1000_RXDCTL(0), "RXDCTL"},
 113         {E1000_ERT, "ERT"},
 114         {E1000_RDBAL, "RDBAL"},
 115         {E1000_RDBAH, "RDBAH"},
 116         {E1000_RDFH, "RDFH"},
 117         {E1000_RDFT, "RDFT"},
 118         {E1000_RDFHS, "RDFHS"},
 119         {E1000_RDFTS, "RDFTS"},
 120         {E1000_RDFPC, "RDFPC"},
 121
 122         /* Tx Registers */
 123         {E1000_TCTL, "TCTL"},
 124         {E1000_TDBAL, "TDBAL"},
 125         {E1000_TDBAH, "TDBAH"},
 126         {E1000_TDLEN, "TDLEN"},
 127         {E1000_TDH, "TDH"},
 128         {E1000_TDT, "TDT"},
 129         {E1000_TIDV, "TIDV"},
 130         {E1000_TXDCTL(0), "TXDCTL"},
 131         {E1000_TADV, "TADV"},
 132         {E1000_TARC(0), "TARC"},
 133         {E1000_TDFH, "TDFH"},
 134         {E1000_TDFT, "TDFT"},
 135         {E1000_TDFHS, "TDFHS"},
 136         {E1000_TDFTS, "TDFTS"},
 137         {E1000_TDFPC, "TDFPC"},
 138
 139         /* List Terminator */
 140         {}
 141 };
 142
 143 /*
 144  * e1000_regdump - register printout routine
 145  */
 146 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
 147 {
 148         int n = 0;
 149         char rname[16];
 150         u32 regs[8];
 151
 152         switch (reginfo->ofs) {
 153         case E1000_RXDCTL(0):
 154                 for (n = 0; n < 2; n++)
 155                         regs[n] = __er32(hw, E1000_RXDCTL(n));
 156                 break;
 157         case E1000_TXDCTL(0):
 158                 for (n = 0; n < 2; n++)
 159                         regs[n] = __er32(hw, E1000_TXDCTL(n));
 160                 break;
 161         case E1000_TARC(0):
 162                 for (n = 0; n < 2; n++)
 163                         regs[n] = __er32(hw, E1000_TARC(n));
 164                 break;
 165         default:
 166                 pr_info("%-15s %08x\n",
 167                         reginfo->name, __er32(hw, reginfo->ofs));
 168                 return;
 169         }
 170
 171         snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
 172         pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
 173 }
 174
 175 /*
 176  * e1000e_dump - Print registers, Tx-ring and Rx-ring
 177  */
 178 static void e1000e_dump(struct e1000_adapter *adapter)
 179 {
 180         struct net_device *netdev = adapter->netdev;
 181         struct e1000_hw *hw = &adapter->hw;
 182         struct e1000_reg_info *reginfo;
 183         struct e1000_ring *tx_ring = adapter->tx_ring;
 184         struct e1000_tx_desc *tx_desc;
 185         struct my_u0 {
 186                 u64 a;
 187                 u64 b;
 188         } *u0;
 189         struct e1000_buffer *buffer_info;
 190         struct e1000_ring *rx_ring = adapter->rx_ring;
 191         union e1000_rx_desc_packet_split *rx_desc_ps;
 192         union e1000_rx_desc_extended *rx_desc;
 193         struct my_u1 {
 194                 u64 a;
 195                 u64 b;
 196                 u64 c;
 197                 u64 d;
 198         } *u1;
 199         u32 staterr;
 200         int i = 0;
 201
 202         if (!netif_msg_hw(adapter))
 203                 return;
 204
 205         /* Print netdevice Info */
 206         if (netdev) {
 207                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 208                 pr_info("Device Name     state            trans_start      last_rx\n");
 209                 pr_info("%-15s %016lX %016lX %016lX\n",
 210                         netdev->name, netdev->state, netdev->trans_start,
 211                         netdev->last_rx);
 212         }
 213
 214         /* Print Registers */
 215         dev_info(&adapter->pdev->dev, "Register Dump\n");
 216         pr_info(" Register Name   Value\n");
 217         for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
 218              reginfo->name; reginfo++) {
 219                 e1000_regdump(hw, reginfo);
 220         }
 221
 222         /* Print Tx Ring Summary */
 223         if (!netdev || !netif_running(netdev))
 224                 goto exit;
 225
 226         dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
 227         pr_info("Queue [NTU] [NTC] [bi(ntc)->dma  ] leng ntw timestamp\n");
 228         buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
 229         pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
 230                 0, tx_ring->next_to_use, tx_ring->next_to_clean,
 231                 (unsigned long long)buffer_info->dma,
 232                 buffer_info->length,
 233                 buffer_info->next_to_watch,
 234                 (unsigned long long)buffer_info->time_stamp);
 235
 236         /* Print Tx Ring */
 237         if (!netif_msg_tx_done(adapter))
 238                 goto rx_ring_summary;
 239
 240         dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
 241
 242         /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
 243          *
 244          * Legacy Transmit Descriptor
 245          *   +--------------------------------------------------------------+
 246          * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |
 247          *   +--------------------------------------------------------------+
 248          * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |
 249          *   +--------------------------------------------------------------+
 250          *   63       48 47        36 35    32 31     24 23    16 15        0
 251          *
 252          * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
 253          *   63      48 47    40 39       32 31             16 15    8 7      0
 254          *   +----------------------------------------------------------------+
 255          * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |
 256          *   +----------------------------------------------------------------+
 257          * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |
 258          *   +----------------------------------------------------------------+
 259          *   63      48 47    40 39 36 35 32 31   24 23  20 19                0
 260          *
 261          * Extended Data Descriptor (DTYP=0x1)
 262          *   +----------------------------------------------------------------+
 263          * 0 |                     Buffer Address [63:0]                      |
 264          *   +----------------------------------------------------------------+
 265          * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |
 266          *   +----------------------------------------------------------------+
 267          *   63       48 47     40 39  36 35    32 31     24 23  20 19        0
 268          */
 269         pr_info("Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Legacy format\n");
 270         pr_info("Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Context format\n");
 271         pr_info("Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Data format\n");
 272         for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 273                 const char *next_desc;
 274                 tx_desc = E1000_TX_DESC(*tx_ring, i);
 275                 buffer_info = &tx_ring->buffer_info[i];
 276                 u0 = (struct my_u0 *)tx_desc;
 277                 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
 278                         next_desc = " NTC/U";
 279                 else if (i == tx_ring->next_to_use)
 280                         next_desc = " NTU";
 281                 else if (i == tx_ring->next_to_clean)
 282                         next_desc = " NTC";
 283                 else
 284                         next_desc = "";
 285                 pr_info("T%c[0x%03X]    %016llX %016llX %016llX %04X  %3X %016llX %p%s\n",
 286                         (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
 287                          ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
 288                         i,
 289                         (unsigned long long)le64_to_cpu(u0->a),
 290                         (unsigned long long)le64_to_cpu(u0->b),
 291                         (unsigned long long)buffer_info->dma,
 292                         buffer_info->length, buffer_info->next_to_watch,
 293                         (unsigned long long)buffer_info->time_stamp,
 294                         buffer_info->skb, next_desc);
 295
 296                 if (netif_msg_pktdata(adapter) && buffer_info->dma != 0)
 297                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 298                                        16, 1, phys_to_virt(buffer_info->dma),
 299                                        buffer_info->length, true);
 300         }
 301
 302         /* Print Rx Ring Summary */
 303 rx_ring_summary:
 304         dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
 305         pr_info("Queue [NTU] [NTC]\n");
 306         pr_info(" %5d %5X %5X\n",
 307                 0, rx_ring->next_to_use, rx_ring->next_to_clean);
 308
 309         /* Print Rx Ring */
 310         if (!netif_msg_rx_status(adapter))
 311                 goto exit;
 312
 313         dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
 314         switch (adapter->rx_ps_pages) {
 315         case 1:
 316         case 2:
 317         case 3:
 318                 /* [Extended] Packet Split Receive Descriptor Format
 319                  *
 320                  *    +-----------------------------------------------------+
 321                  *  0 |                Buffer Address 0 [63:0]              |
 322                  *    +-----------------------------------------------------+
 323                  *  8 |                Buffer Address 1 [63:0]              |
 324                  *    +-----------------------------------------------------+
 325                  * 16 |                Buffer Address 2 [63:0]              |
 326                  *    +-----------------------------------------------------+
 327                  * 24 |                Buffer Address 3 [63:0]              |
 328                  *    +-----------------------------------------------------+
 329                  */
 330                 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");
 331                 /* [Extended] Receive Descriptor (Write-Back) Format
 332                  *
 333                  *   63       48 47    32 31     13 12    8 7    4 3        0
 334                  *   +------------------------------------------------------+
 335                  * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |
 336                  *   | Checksum | Ident  |         | Queue |      |  Type   |
 337                  *   +------------------------------------------------------+
 338                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 339                  *   +------------------------------------------------------+
 340                  *   63       48 47    32 31            20 19               0
 341                  */
 342                 pr_info("RWB[desc]      [ck ipid mrqhsh] [vl   l0 ee  es] [ l3  l2  l1 hs] [reserved      ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
 343                 for (i = 0; i < rx_ring->count; i++) {
 344                         const char *next_desc;
 345                         buffer_info = &rx_ring->buffer_info[i];
 346                         rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
 347                         u1 = (struct my_u1 *)rx_desc_ps;
 348                         staterr =
 349                             le32_to_cpu(rx_desc_ps->wb.middle.status_error);
 350
 351                         if (i == rx_ring->next_to_use)
 352                                 next_desc = " NTU";
 353                         else if (i == rx_ring->next_to_clean)
 354                                 next_desc = " NTC";
 355                         else
 356                                 next_desc = "";
 357
 358                         if (staterr & E1000_RXD_STAT_DD) {
 359                                 /* Descriptor Done */
 360                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX ---------------- %p%s\n",
 361                                         "RWB", i,
 362                                         (unsigned long long)le64_to_cpu(u1->a),
 363                                         (unsigned long long)le64_to_cpu(u1->b),
 364                                         (unsigned long long)le64_to_cpu(u1->c),
 365                                         (unsigned long long)le64_to_cpu(u1->d),
 366                                         buffer_info->skb, next_desc);
 367                         } else {
 368                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX %016llX %p%s\n",
 369                                         "R  ", i,
 370                                         (unsigned long long)le64_to_cpu(u1->a),
 371                                         (unsigned long long)le64_to_cpu(u1->b),
 372                                         (unsigned long long)le64_to_cpu(u1->c),
 373                                         (unsigned long long)le64_to_cpu(u1->d),
 374                                         (unsigned long long)buffer_info->dma,
 375                                         buffer_info->skb, next_desc);
 376
 377                                 if (netif_msg_pktdata(adapter))
 378                                         print_hex_dump(KERN_INFO, "",
 379                                                 DUMP_PREFIX_ADDRESS, 16, 1,
 380                                                 phys_to_virt(buffer_info->dma),
 381                                                 adapter->rx_ps_bsize0, true);
 382                         }
 383                 }
 384                 break;
 385         default:
 386         case 0:
 387                 /* Extended Receive Descriptor (Read) Format
 388                  *
 389                  *   +-----------------------------------------------------+
 390                  * 0 |                Buffer Address [63:0]                |
 391                  *   +-----------------------------------------------------+
 392                  * 8 |                      Reserved                       |
 393                  *   +-----------------------------------------------------+
 394                  */
 395                 pr_info("R  [desc]      [buf addr 63:0 ] [reserved 63:0 ] [bi->dma       ] [bi->skb] <-- Ext (Read) format\n");
 396                 /* Extended Receive Descriptor (Write-Back) Format
 397                  *
 398                  *   63       48 47    32 31    24 23            4 3        0
 399                  *   +------------------------------------------------------+
 400                  *   |     RSS Hash      |        |               |         |
 401                  * 0 +-------------------+  Rsvd  |   Reserved    | MRQ RSS |
 402                  *   | Packet   | IP     |        |               |  Type   |
 403                  *   | Checksum | Ident  |        |               |         |
 404                  *   +------------------------------------------------------+
 405                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 406                  *   +------------------------------------------------------+
 407                  *   63       48 47    32 31            20 19               0
 408                  */
 409                 pr_info("RWB[desc]      [cs ipid    mrq] [vt   ln xe  xs] [bi->skb] <-- Ext (Write-Back) format\n");
 410
 411                 for (i = 0; i < rx_ring->count; i++) {
 412                         const char *next_desc;
 413
 414                         buffer_info = &rx_ring->buffer_info[i];
 415                         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 416                         u1 = (struct my_u1 *)rx_desc;
 417                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 418
 419                         if (i == rx_ring->next_to_use)
 420                                 next_desc = " NTU";
 421                         else if (i == rx_ring->next_to_clean)
 422                                 next_desc = " NTC";
 423                         else
 424                                 next_desc = "";
 425
 426                         if (staterr & E1000_RXD_STAT_DD) {
 427                                 /* Descriptor Done */
 428                                 pr_info("%s[0x%03X]     %016llX %016llX ---------------- %p%s\n",
 429                                         "RWB", i,
 430                                         (unsigned long long)le64_to_cpu(u1->a),
 431                                         (unsigned long long)le64_to_cpu(u1->b),
 432                                         buffer_info->skb, next_desc);
 433                         } else {
 434                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %p%s\n",
 435                                         "R  ", i,
 436                                         (unsigned long long)le64_to_cpu(u1->a),
 437                                         (unsigned long long)le64_to_cpu(u1->b),
 438                                         (unsigned long long)buffer_info->dma,
 439                                         buffer_info->skb, next_desc);
 440
 441                                 if (netif_msg_pktdata(adapter))
 442                                         print_hex_dump(KERN_INFO, "",
 443                                                        DUMP_PREFIX_ADDRESS, 16,
 444                                                        1,
 445                                                        phys_to_virt
 446                                                        (buffer_info->dma),
 447                                                        adapter->rx_buffer_len,
 448                                                        true);
 449                         }
 450                 }
 451         }
 452
 453 exit:
 454         return;
 455 }
 456
 457 /**
 458  * e1000_desc_unused - calculate if we have unused descriptors
 459  **/
 460 static int e1000_desc_unused(struct e1000_ring *ring)
 461 {
 462         if (ring->next_to_clean > ring->next_to_use)
 463                 return ring->next_to_clean - ring->next_to_use - 1;
 464
 465         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 466 }
 467
 468 /**
 469  * e1000_receive_skb - helper function to handle Rx indications
 470  * @adapter: board private structure
 471  * @status: descriptor status field as written by hardware
 472  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 473  * @skb: pointer to sk_buff to be indicated to stack
 474  **/
 475 static void e1000_receive_skb(struct e1000_adapter *adapter,
 476                               struct net_device *netdev, struct sk_buff *skb,
 477                               u8 status, __le16 vlan)
 478 {
 479         u16 tag = le16_to_cpu(vlan);
 480         skb->protocol = eth_type_trans(skb, netdev);
 481
 482         if (status & E1000_RXD_STAT_VP)
 483                 __vlan_hwaccel_put_tag(skb, tag);
 484
 485         napi_gro_receive(&adapter->napi, skb);
 486 }
 487
 488 /**
 489  * e1000_rx_checksum - Receive Checksum Offload
 490  * @adapter:     board private structure
 491  * @status_err:  receive descriptor status and error fields
 492  * @csum:       receive descriptor csum field
 493  * @sk_buff:     socket buffer with received data
 494  **/
 495 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 496                               u32 csum, struct sk_buff *skb)
 497 {
 498         u16 status = (u16)status_err;
 499         u8 errors = (u8)(status_err >> 24);
 500
 501         skb_checksum_none_assert(skb);
 502
 503         /* Ignore Checksum bit is set */
 504         if (status & E1000_RXD_STAT_IXSM)
 505                 return;
 506         /* TCP/UDP checksum error bit is set */
 507         if (errors & E1000_RXD_ERR_TCPE) {
 508                 /* let the stack verify checksum errors */
 509                 adapter->hw_csum_err++;
 510                 return;
 511         }
 512
 513         /* TCP/UDP Checksum has not been calculated */
 514         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 515                 return;
 516
 517         /* It must be a TCP or UDP packet with a valid checksum */
 518         if (status & E1000_RXD_STAT_TCPCS) {
 519                 /* TCP checksum is good */
 520                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 521         } else {
 522                 /*
 523                  * IP fragment with UDP payload
 524                  * Hardware complements the payload checksum, so we undo it
 525                  * and then put the value in host order for further stack use.
 526                  */
 527                 __sum16 sum = (__force __sum16)htons(csum);
 528                 skb->csum = csum_unfold(~sum);
 529                 skb->ip_summed = CHECKSUM_COMPLETE;
 530         }
 531         adapter->hw_csum_good++;
 532 }
 533
 534 /**
 535  * e1000e_update_tail_wa - helper function for e1000e_update_[rt]dt_wa()
 536  * @hw: pointer to the HW structure
 537  * @tail: address of tail descriptor register
 538  * @i: value to write to tail descriptor register
 539  *
 540  * When updating the tail register, the ME could be accessing Host CSR
 541  * registers at the same time.  Normally, this is handled in h/w by an
 542  * arbiter but on some parts there is a bug that acknowledges Host accesses
 543  * later than it should which could result in the descriptor register to
 544  * have an incorrect value.  Workaround this by checking the FWSM register
 545  * which has bit 24 set while ME is accessing Host CSR registers, wait
 546  * if it is set and try again a number of times.
 547  **/
 548 static inline s32 e1000e_update_tail_wa(struct e1000_hw *hw, u8 __iomem * tail,
 549                                         unsigned int i)
 550 {
 551         unsigned int j = 0;
 552
 553         while ((j++ < E1000_ICH_FWSM_PCIM2PCI_COUNT) &&
 554                (er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI))
 555                 udelay(50);
 556
 557         writel(i, tail);
 558
 559         if ((j == E1000_ICH_FWSM_PCIM2PCI_COUNT) && (i != readl(tail)))
 560                 return E1000_ERR_SWFW_SYNC;
 561
 562         return 0;
 563 }
 564
 565 static void e1000e_update_rdt_wa(struct e1000_adapter *adapter, unsigned int i)
 566 {
 567         u8 __iomem *tail = (adapter->hw.hw_addr + adapter->rx_ring->tail);
 568         struct e1000_hw *hw = &adapter->hw;
 569
 570         if (e1000e_update_tail_wa(hw, tail, i)) {
 571                 u32 rctl = er32(RCTL);
 572                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
 573                 e_err("ME firmware caused invalid RDT - resetting\n");
 574                 schedule_work(&adapter->reset_task);
 575         }
 576 }
 577
 578 static void e1000e_update_tdt_wa(struct e1000_adapter *adapter, unsigned int i)
 579 {
 580         u8 __iomem *tail = (adapter->hw.hw_addr + adapter->tx_ring->tail);
 581         struct e1000_hw *hw = &adapter->hw;
 582
 583         if (e1000e_update_tail_wa(hw, tail, i)) {
 584                 u32 tctl = er32(TCTL);
 585                 ew32(TCTL, tctl & ~E1000_TCTL_EN);
 586                 e_err("ME firmware caused invalid TDT - resetting\n");
 587                 schedule_work(&adapter->reset_task);
 588         }
 589 }
 590
 591 /**
 592  * e1000_alloc_rx_buffers - Replace used receive buffers
 593  * @adapter: address of board private structure
 594  **/
 595 static void e1000_alloc_rx_buffers(struct e1000_adapter *adapter,
 596                                    int cleaned_count, gfp_t gfp)
 597 {
 598         struct net_device *netdev = adapter->netdev;
 599         struct pci_dev *pdev = adapter->pdev;
 600         struct e1000_ring *rx_ring = adapter->rx_ring;
 601         union e1000_rx_desc_extended *rx_desc;
 602         struct e1000_buffer *buffer_info;
 603         struct sk_buff *skb;
 604         unsigned int i;
 605         unsigned int bufsz = adapter->rx_buffer_len;
 606
 607         i = rx_ring->next_to_use;
 608         buffer_info = &rx_ring->buffer_info[i];
 609
 610         while (cleaned_count--) {
 611                 skb = buffer_info->skb;
 612                 if (skb) {
 613                         skb_trim(skb, 0);
 614                         goto map_skb;
 615                 }
 616
 617                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 618                 if (!skb) {
 619                         /* Better luck next round */
 620                         adapter->alloc_rx_buff_failed++;
 621                         break;
 622                 }
 623
 624                 buffer_info->skb = skb;
 625 map_skb:
 626                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 627                                                   adapter->rx_buffer_len,
 628                                                   DMA_FROM_DEVICE);
 629                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 630                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 631                         adapter->rx_dma_failed++;
 632                         break;
 633                 }
 634
 635                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 636                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 637
 638                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 639                         /*
 640                          * Force memory writes to complete before letting h/w
 641                          * know there are new descriptors to fetch.  (Only
 642                          * applicable for weak-ordered memory model archs,
 643                          * such as IA-64).
 644                          */
 645                         wmb();
 646                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 647                                 e1000e_update_rdt_wa(adapter, i);
 648                         else
 649                                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 650                 }
 651                 i++;
 652                 if (i == rx_ring->count)
 653                         i = 0;
 654                 buffer_info = &rx_ring->buffer_info[i];
 655         }
 656
 657         rx_ring->next_to_use = i;
 658 }
 659
 660 /**
 661  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 662  * @adapter: address of board private structure
 663  **/
 664 static void e1000_alloc_rx_buffers_ps(struct e1000_adapter *adapter,
 665                                       int cleaned_count, gfp_t gfp)
 666 {
 667         struct net_device *netdev = adapter->netdev;
 668         struct pci_dev *pdev = adapter->pdev;
 669         union e1000_rx_desc_packet_split *rx_desc;
 670         struct e1000_ring *rx_ring = adapter->rx_ring;
 671         struct e1000_buffer *buffer_info;
 672         struct e1000_ps_page *ps_page;
 673         struct sk_buff *skb;
 674         unsigned int i, j;
 675
 676         i = rx_ring->next_to_use;
 677         buffer_info = &rx_ring->buffer_info[i];
 678
 679         while (cleaned_count--) {
 680                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 681
 682                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 683                         ps_page = &buffer_info->ps_pages[j];
 684                         if (j >= adapter->rx_ps_pages) {
 685                                 /* all unused desc entries get hw null ptr */
 686                                 rx_desc->read.buffer_addr[j + 1] =
 687                                     ~cpu_to_le64(0);
 688                                 continue;
 689                         }
 690                         if (!ps_page->page) {
 691                                 ps_page->page = alloc_page(gfp);
 692                                 if (!ps_page->page) {
 693                                         adapter->alloc_rx_buff_failed++;
 694                                         goto no_buffers;
 695                                 }
 696                                 ps_page->dma = dma_map_page(&pdev->dev,
 697                                                             ps_page->page,
 698                                                             0, PAGE_SIZE,
 699                                                             DMA_FROM_DEVICE);
 700                                 if (dma_mapping_error(&pdev->dev,
 701                                                       ps_page->dma)) {
 702                                         dev_err(&adapter->pdev->dev,
 703                                                 "Rx DMA page map failed\n");
 704                                         adapter->rx_dma_failed++;
 705                                         goto no_buffers;
 706                                 }
 707                         }
 708                         /*
 709                          * Refresh the desc even if buffer_addrs
 710                          * didn't change because each write-back
 711                          * erases this info.
 712                          */
 713                         rx_desc->read.buffer_addr[j + 1] =
 714                             cpu_to_le64(ps_page->dma);
 715                 }
 716
 717                 skb = __netdev_alloc_skb_ip_align(netdev,
 718                                                   adapter->rx_ps_bsize0,
 719                                                   gfp);
 720
 721                 if (!skb) {
 722                         adapter->alloc_rx_buff_failed++;
 723                         break;
 724                 }
 725
 726                 buffer_info->skb = skb;
 727                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 728                                                   adapter->rx_ps_bsize0,
 729                                                   DMA_FROM_DEVICE);
 730                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 731                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 732                         adapter->rx_dma_failed++;
 733                         /* cleanup skb */
 734                         dev_kfree_skb_any(skb);
 735                         buffer_info->skb = NULL;
 736                         break;
 737                 }
 738
 739                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 740
 741                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 742                         /*
 743                          * Force memory writes to complete before letting h/w
 744                          * know there are new descriptors to fetch.  (Only
 745                          * applicable for weak-ordered memory model archs,
 746                          * such as IA-64).
 747                          */
 748                         wmb();
 749                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 750                                 e1000e_update_rdt_wa(adapter, i << 1);
 751                         else
 752                                 writel(i << 1,
 753                                        adapter->hw.hw_addr + rx_ring->tail);
 754                 }
 755
 756                 i++;
 757                 if (i == rx_ring->count)
 758                         i = 0;
 759                 buffer_info = &rx_ring->buffer_info[i];
 760         }
 761
 762 no_buffers:
 763         rx_ring->next_to_use = i;
 764 }
 765
 766 /**
 767  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 768  * @adapter: address of board private structure
 769  * @cleaned_count: number of buffers to allocate this pass
 770  **/
 771
 772 static void e1000_alloc_jumbo_rx_buffers(struct e1000_adapter *adapter,
 773                                          int cleaned_count, gfp_t gfp)
 774 {
 775         struct net_device *netdev = adapter->netdev;
 776         struct pci_dev *pdev = adapter->pdev;
 777         union e1000_rx_desc_extended *rx_desc;
 778         struct e1000_ring *rx_ring = adapter->rx_ring;
 779         struct e1000_buffer *buffer_info;
 780         struct sk_buff *skb;
 781         unsigned int i;
 782         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 783
 784         i = rx_ring->next_to_use;
 785         buffer_info = &rx_ring->buffer_info[i];
 786
 787         while (cleaned_count--) {
 788                 skb = buffer_info->skb;
 789                 if (skb) {
 790                         skb_trim(skb, 0);
 791                         goto check_page;
 792                 }
 793
 794                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 795                 if (unlikely(!skb)) {
 796                         /* Better luck next round */
 797                         adapter->alloc_rx_buff_failed++;
 798                         break;
 799                 }
 800
 801                 buffer_info->skb = skb;
 802 check_page:
 803                 /* allocate a new page if necessary */
 804                 if (!buffer_info->page) {
 805                         buffer_info->page = alloc_page(gfp);
 806                         if (unlikely(!buffer_info->page)) {
 807                                 adapter->alloc_rx_buff_failed++;
 808                                 break;
 809                         }
 810                 }
 811
 812                 if (!buffer_info->dma)
 813                         buffer_info->dma = dma_map_page(&pdev->dev,
 814                                                         buffer_info->page, 0,
 815                                                         PAGE_SIZE,
 816                                                         DMA_FROM_DEVICE);
 817
 818                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 819                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 820
 821                 if (unlikely(++i == rx_ring->count))
 822                         i = 0;
 823                 buffer_info = &rx_ring->buffer_info[i];
 824         }
 825
 826         if (likely(rx_ring->next_to_use != i)) {
 827                 rx_ring->next_to_use = i;
 828                 if (unlikely(i-- == 0))
 829                         i = (rx_ring->count - 1);
 830
 831                 /* Force memory writes to complete before letting h/w
 832                  * know there are new descriptors to fetch.  (Only
 833                  * applicable for weak-ordered memory model archs,
 834                  * such as IA-64). */
 835                 wmb();
 836                 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 837                         e1000e_update_rdt_wa(adapter, i);
 838                 else
 839                         writel(i, adapter->hw.hw_addr + rx_ring->tail);
 840         }
 841 }
 842
 843 /**
 844  * e1000_clean_rx_irq - Send received data up the network stack; legacy
 845  * @adapter: board private structure
 846  *
 847  * the return value indicates whether actual cleaning was done, there
 848  * is no guarantee that everything was cleaned
 849  **/
 850 static bool e1000_clean_rx_irq(struct e1000_adapter *adapter,
 851                                int *work_done, int work_to_do)
 852 {
 853         struct net_device *netdev = adapter->netdev;
 854         struct pci_dev *pdev = adapter->pdev;
 855         struct e1000_hw *hw = &adapter->hw;
 856         struct e1000_ring *rx_ring = adapter->rx_ring;
 857         union e1000_rx_desc_extended *rx_desc, *next_rxd;
 858         struct e1000_buffer *buffer_info, *next_buffer;
 859         u32 length, staterr;
 860         unsigned int i;
 861         int cleaned_count = 0;
 862         bool cleaned = 0;
 863         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 864
 865         i = rx_ring->next_to_clean;
 866         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 867         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 868         buffer_info = &rx_ring->buffer_info[i];
 869
 870         while (staterr & E1000_RXD_STAT_DD) {
 871                 struct sk_buff *skb;
 872
 873                 if (*work_done >= work_to_do)
 874                         break;
 875                 (*work_done)++;
 876                 rmb();  /* read descriptor and rx_buffer_info after status DD */
 877
 878                 skb = buffer_info->skb;
 879                 buffer_info->skb = NULL;
 880
 881                 prefetch(skb->data - NET_IP_ALIGN);
 882
 883                 i++;
 884                 if (i == rx_ring->count)
 885                         i = 0;
 886                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
 887                 prefetch(next_rxd);
 888
 889                 next_buffer = &rx_ring->buffer_info[i];
 890
 891                 cleaned = 1;
 892                 cleaned_count++;
 893                 dma_unmap_single(&pdev->dev,
 894                                  buffer_info->dma,
 895                                  adapter->rx_buffer_len,
 896                                  DMA_FROM_DEVICE);
 897                 buffer_info->dma = 0;
 898
 899                 length = le16_to_cpu(rx_desc->wb.upper.length);
 900
 901                 /*
 902                  * !EOP means multiple descriptors were used to store a single
 903                  * packet, if that's the case we need to toss it.  In fact, we
 904                  * need to toss every packet with the EOP bit clear and the
 905                  * next frame that _does_ have the EOP bit set, as it is by
 906                  * definition only a frame fragment
 907                  */
 908                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
 909                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 910
 911                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 912                         /* All receives must fit into a single buffer */
 913                         e_dbg("Receive packet consumed multiple buffers\n");
 914                         /* recycle */
 915                         buffer_info->skb = skb;
 916                         if (staterr & E1000_RXD_STAT_EOP)
 917                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 918                         goto next_desc;
 919                 }
 920
 921                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
 922                         /* recycle */
 923                         buffer_info->skb = skb;
 924                         goto next_desc;
 925                 }
 926
 927                 /* adjust length to remove Ethernet CRC */
 928                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
 929                         length -= 4;
 930
 931                 total_rx_bytes += length;
 932                 total_rx_packets++;
 933
 934                 /*
 935                  * code added for copybreak, this should improve
 936                  * performance for small packets with large amounts
 937                  * of reassembly being done in the stack
 938                  */
 939                 if (length < copybreak) {
 940                         struct sk_buff *new_skb =
 941                             netdev_alloc_skb_ip_align(netdev, length);
 942                         if (new_skb) {
 943                                 skb_copy_to_linear_data_offset(new_skb,
 944                                                                -NET_IP_ALIGN,
 945                                                                (skb->data -
 946                                                                 NET_IP_ALIGN),
 947                                                                (length +
 948                                                                 NET_IP_ALIGN));
 949                                 /* save the skb in buffer_info as good */
 950                                 buffer_info->skb = skb;
 951                                 skb = new_skb;
 952                         }
 953                         /* else just continue with the old one */
 954                 }
 955                 /* end copybreak code */
 956                 skb_put(skb, length);
 957
 958                 /* Receive Checksum Offload */
 959                 e1000_rx_checksum(adapter, staterr,
 960                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.
 961                                               csum_ip.csum), skb);
 962
 963                 e1000_receive_skb(adapter, netdev, skb, staterr,
 964                                   rx_desc->wb.upper.vlan);
 965
 966 next_desc:
 967                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
 968
 969                 /* return some buffers to hardware, one at a time is too slow */
 970                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 971                         adapter->alloc_rx_buf(adapter, cleaned_count,
 972                                               GFP_ATOMIC);
 973                         cleaned_count = 0;
 974                 }
 975
 976                 /* use prefetched values */
 977                 rx_desc = next_rxd;
 978                 buffer_info = next_buffer;
 979
 980                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 981         }
 982         rx_ring->next_to_clean = i;
 983
 984         cleaned_count = e1000_desc_unused(rx_ring);
 985         if (cleaned_count)
 986                 adapter->alloc_rx_buf(adapter, cleaned_count, GFP_ATOMIC);
 987
 988         adapter->total_rx_bytes += total_rx_bytes;
 989         adapter->total_rx_packets += total_rx_packets;
 990         return cleaned;
 991 }
 992
 993 static void e1000_put_txbuf(struct e1000_adapter *adapter,
 994                              struct e1000_buffer *buffer_info)
 995 {
 996         if (buffer_info->dma) {
 997                 if (buffer_info->mapped_as_page)
 998                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
 999                                        buffer_info->length, DMA_TO_DEVICE);
1000                 else
1001                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1002                                          buffer_info->length, DMA_TO_DEVICE);
1003                 buffer_info->dma = 0;
1004         }
1005         if (buffer_info->skb) {
1006                 dev_kfree_skb_any(buffer_info->skb);
1007                 buffer_info->skb = NULL;
1008         }
1009         buffer_info->time_stamp = 0;
1010 }
1011
1012 static void e1000_print_hw_hang(struct work_struct *work)
1013 {
1014         struct e1000_adapter *adapter = container_of(work,
1015                                                      struct e1000_adapter,
1016                                                      print_hang_task);
1017         struct e1000_ring *tx_ring = adapter->tx_ring;
1018         unsigned int i = tx_ring->next_to_clean;
1019         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1020         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1021         struct e1000_hw *hw = &adapter->hw;
1022         u16 phy_status, phy_1000t_status, phy_ext_status;
1023         u16 pci_status;
1024
1025         if (test_bit(__E1000_DOWN, &adapter->state))
1026                 return;
1027
1028         e1e_rphy(hw, PHY_STATUS, &phy_status);
1029         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
1030         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
1031
1032         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1033
1034         /* detected Hardware unit hang */
1035         e_err("Detected Hardware Unit Hang:\n"
1036               "  TDH                  <%x>\n"
1037               "  TDT                  <%x>\n"
1038               "  next_to_use          <%x>\n"
1039               "  next_to_clean        <%x>\n"
1040               "buffer_info[next_to_clean]:\n"
1041               "  time_stamp           <%lx>\n"
1042               "  next_to_watch        <%x>\n"
1043               "  jiffies              <%lx>\n"
1044               "  next_to_watch.status <%x>\n"
1045               "MAC Status             <%x>\n"
1046               "PHY Status             <%x>\n"
1047               "PHY 1000BASE-T Status  <%x>\n"
1048               "PHY Extended Status    <%x>\n"
1049               "PCI Status             <%x>\n",
1050               readl(adapter->hw.hw_addr + tx_ring->head),
1051               readl(adapter->hw.hw_addr + tx_ring->tail),
1052               tx_ring->next_to_use,
1053               tx_ring->next_to_clean,
1054               tx_ring->buffer_info[eop].time_stamp,
1055               eop,
1056               jiffies,
1057               eop_desc->upper.fields.status,
1058               er32(STATUS),
1059               phy_status,
1060               phy_1000t_status,
1061               phy_ext_status,
1062               pci_status);
1063 }
1064
1065 /**
1066  * e1000_clean_tx_irq - Reclaim resources after transmit completes
1067  * @adapter: board private structure
1068  *
1069  * the return value indicates whether actual cleaning was done, there
1070  * is no guarantee that everything was cleaned
1071  **/
1072 static bool e1000_clean_tx_irq(struct e1000_adapter *adapter)
1073 {
1074         struct net_device *netdev = adapter->netdev;
1075         struct e1000_hw *hw = &adapter->hw;
1076         struct e1000_ring *tx_ring = adapter->tx_ring;
1077         struct e1000_tx_desc *tx_desc, *eop_desc;
1078         struct e1000_buffer *buffer_info;
1079         unsigned int i, eop;
1080         unsigned int count = 0;
1081         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1082
1083         i = tx_ring->next_to_clean;
1084         eop = tx_ring->buffer_info[i].next_to_watch;
1085         eop_desc = E1000_TX_DESC(*tx_ring, eop);
1086
1087         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1088                (count < tx_ring->count)) {
1089                 bool cleaned = false;
1090                 rmb(); /* read buffer_info after eop_desc */
1091                 for (; !cleaned; count++) {
1092                         tx_desc = E1000_TX_DESC(*tx_ring, i);
1093                         buffer_info = &tx_ring->buffer_info[i];
1094                         cleaned = (i == eop);
1095
1096                         if (cleaned) {
1097                                 total_tx_packets += buffer_info->segs;
1098                                 total_tx_bytes += buffer_info->bytecount;
1099                         }
1100
1101                         e1000_put_txbuf(adapter, buffer_info);
1102                         tx_desc->upper.data = 0;
1103
1104                         i++;
1105                         if (i == tx_ring->count)
1106                                 i = 0;
1107                 }
1108
1109                 if (i == tx_ring->next_to_use)
1110                         break;
1111                 eop = tx_ring->buffer_info[i].next_to_watch;
1112                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1113         }
1114
1115         tx_ring->next_to_clean = i;
1116
1117 #define TX_WAKE_THRESHOLD 32
1118         if (count && netif_carrier_ok(netdev) &&
1119             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1120                 /* Make sure that anybody stopping the queue after this
1121                  * sees the new next_to_clean.
1122                  */
1123                 smp_mb();
1124
1125                 if (netif_queue_stopped(netdev) &&
1126                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1127                         netif_wake_queue(netdev);
1128                         ++adapter->restart_queue;
1129                 }
1130         }
1131
1132         if (adapter->detect_tx_hung) {
1133                 /*
1134                  * Detect a transmit hang in hardware, this serializes the
1135                  * check with the clearing of time_stamp and movement of i
1136                  */
1137                 adapter->detect_tx_hung = 0;
1138                 if (tx_ring->buffer_info[i].time_stamp &&
1139                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1140                                + (adapter->tx_timeout_factor * HZ)) &&
1141                     !(er32(STATUS) & E1000_STATUS_TXOFF)) {
1142                         schedule_work(&adapter->print_hang_task);
1143                         netif_stop_queue(netdev);
1144                 }
1145         }
1146         adapter->total_tx_bytes += total_tx_bytes;
1147         adapter->total_tx_packets += total_tx_packets;
1148         return count < tx_ring->count;
1149 }
1150
1151 /**
1152  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1153  * @adapter: board private structure
1154  *
1155  * the return value indicates whether actual cleaning was done, there
1156  * is no guarantee that everything was cleaned
1157  **/
1158 static bool e1000_clean_rx_irq_ps(struct e1000_adapter *adapter,
1159                                   int *work_done, int work_to_do)
1160 {
1161         struct e1000_hw *hw = &adapter->hw;
1162         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1163         struct net_device *netdev = adapter->netdev;
1164         struct pci_dev *pdev = adapter->pdev;
1165         struct e1000_ring *rx_ring = adapter->rx_ring;
1166         struct e1000_buffer *buffer_info, *next_buffer;
1167         struct e1000_ps_page *ps_page;
1168         struct sk_buff *skb;
1169         unsigned int i, j;
1170         u32 length, staterr;
1171         int cleaned_count = 0;
1172         bool cleaned = 0;
1173         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1174
1175         i = rx_ring->next_to_clean;
1176         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1177         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1178         buffer_info = &rx_ring->buffer_info[i];
1179
1180         while (staterr & E1000_RXD_STAT_DD) {
1181                 if (*work_done >= work_to_do)
1182                         break;
1183                 (*work_done)++;
1184                 skb = buffer_info->skb;
1185                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1186
1187                 /* in the packet split case this is header only */
1188                 prefetch(skb->data - NET_IP_ALIGN);
1189
1190                 i++;
1191                 if (i == rx_ring->count)
1192                         i = 0;
1193                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1194                 prefetch(next_rxd);
1195
1196                 next_buffer = &rx_ring->buffer_info[i];
1197
1198                 cleaned = 1;
1199                 cleaned_count++;
1200                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1201                                  adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1202                 buffer_info->dma = 0;
1203
1204                 /* see !EOP comment in other Rx routine */
1205                 if (!(staterr & E1000_RXD_STAT_EOP))
1206                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1207
1208                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1209                         e_dbg("Packet Split buffers didn't pick up the full packet\n");
1210                         dev_kfree_skb_irq(skb);
1211                         if (staterr & E1000_RXD_STAT_EOP)
1212                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1213                         goto next_desc;
1214                 }
1215
1216                 if (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) {
1217                         dev_kfree_skb_irq(skb);
1218                         goto next_desc;
1219                 }
1220
1221                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1222
1223                 if (!length) {
1224                         e_dbg("Last part of the packet spanning multiple descriptors\n");
1225                         dev_kfree_skb_irq(skb);
1226                         goto next_desc;
1227                 }
1228
1229                 /* Good Receive */
1230                 skb_put(skb, length);
1231
1232                 {
1233                 /*
1234                  * this looks ugly, but it seems compiler issues make it
1235                  * more efficient than reusing j
1236                  */
1237                 int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1238
1239                 /*
1240                  * page alloc/put takes too long and effects small packet
1241                  * throughput, so unsplit small packets and save the alloc/put
1242                  * only valid in softirq (napi) context to call kmap_*
1243                  */
1244                 if (l1 && (l1 <= copybreak) &&
1245                     ((length + l1) <= adapter->rx_ps_bsize0)) {
1246                         u8 *vaddr;
1247
1248                         ps_page = &buffer_info->ps_pages[0];
1249
1250                         /*
1251                          * there is no documentation about how to call
1252                          * kmap_atomic, so we can't hold the mapping
1253                          * very long
1254                          */
1255                         dma_sync_single_for_cpu(&pdev->dev, ps_page->dma,
1256                                                 PAGE_SIZE, DMA_FROM_DEVICE);
1257                         vaddr = kmap_atomic(ps_page->page, KM_SKB_DATA_SOFTIRQ);
1258                         memcpy(skb_tail_pointer(skb), vaddr, l1);
1259                         kunmap_atomic(vaddr, KM_SKB_DATA_SOFTIRQ);
1260                         dma_sync_single_for_device(&pdev->dev, ps_page->dma,
1261                                                    PAGE_SIZE, DMA_FROM_DEVICE);
1262
1263                         /* remove the CRC */
1264                         if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
1265                                 l1 -= 4;
1266
1267                         skb_put(skb, l1);
1268                         goto copydone;
1269                 } /* if */
1270                 }
1271
1272                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1273                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1274                         if (!length)
1275                                 break;
1276
1277                         ps_page = &buffer_info->ps_pages[j];
1278                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1279                                        DMA_FROM_DEVICE);
1280                         ps_page->dma = 0;
1281                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1282                         ps_page->page = NULL;
1283                         skb->len += length;
1284                         skb->data_len += length;
1285                         skb->truesize += PAGE_SIZE;
1286                 }
1287
1288                 /* strip the ethernet crc, problem is we're using pages now so
1289                  * this whole operation can get a little cpu intensive
1290                  */
1291                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING))
1292                         pskb_trim(skb, skb->len - 4);
1293
1294 copydone:
1295                 total_rx_bytes += skb->len;
1296                 total_rx_packets++;
1297
1298                 e1000_rx_checksum(adapter, staterr, le16_to_cpu(
1299                         rx_desc->wb.lower.hi_dword.csum_ip.csum), skb);
1300
1301                 if (rx_desc->wb.upper.header_status &
1302                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1303                         adapter->rx_hdr_split++;
1304
1305                 e1000_receive_skb(adapter, netdev, skb,
1306                                   staterr, rx_desc->wb.middle.vlan);
1307
1308 next_desc:
1309                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1310                 buffer_info->skb = NULL;
1311
1312                 /* return some buffers to hardware, one at a time is too slow */
1313                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1314                         adapter->alloc_rx_buf(adapter, cleaned_count,
1315                                               GFP_ATOMIC);
1316                         cleaned_count = 0;
1317                 }
1318
1319                 /* use prefetched values */
1320                 rx_desc = next_rxd;
1321                 buffer_info = next_buffer;
1322
1323                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1324         }
1325         rx_ring->next_to_clean = i;
1326
1327         cleaned_count = e1000_desc_unused(rx_ring);
1328         if (cleaned_count)
1329                 adapter->alloc_rx_buf(adapter, cleaned_count, GFP_ATOMIC);
1330
1331         adapter->total_rx_bytes += total_rx_bytes;
1332         adapter->total_rx_packets += total_rx_packets;
1333         return cleaned;
1334 }
1335
1336 /**
1337  * e1000_consume_page - helper function
1338  **/
1339 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1340                                u16 length)
1341 {
1342         bi->page = NULL;
1343         skb->len += length;
1344         skb->data_len += length;
1345         skb->truesize += PAGE_SIZE;
1346 }
1347
1348 /**
1349  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1350  * @adapter: board private structure
1351  *
1352  * the return value indicates whether actual cleaning was done, there
1353  * is no guarantee that everything was cleaned
1354  **/
1355
1356 static bool e1000_clean_jumbo_rx_irq(struct e1000_adapter *adapter,
1357                                      int *work_done, int work_to_do)
1358 {
1359         struct net_device *netdev = adapter->netdev;
1360         struct pci_dev *pdev = adapter->pdev;
1361         struct e1000_ring *rx_ring = adapter->rx_ring;
1362         union e1000_rx_desc_extended *rx_desc, *next_rxd;
1363         struct e1000_buffer *buffer_info, *next_buffer;
1364         u32 length, staterr;
1365         unsigned int i;
1366         int cleaned_count = 0;
1367         bool cleaned = false;
1368         unsigned int total_rx_bytes=0, total_rx_packets=0;
1369
1370         i = rx_ring->next_to_clean;
1371         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1372         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1373         buffer_info = &rx_ring->buffer_info[i];
1374
1375         while (staterr & E1000_RXD_STAT_DD) {
1376                 struct sk_buff *skb;
1377
1378                 if (*work_done >= work_to_do)
1379                         break;
1380                 (*work_done)++;
1381                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1382
1383                 skb = buffer_info->skb;
1384                 buffer_info->skb = NULL;
1385
1386                 ++i;
1387                 if (i == rx_ring->count)
1388                         i = 0;
1389                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1390                 prefetch(next_rxd);
1391
1392                 next_buffer = &rx_ring->buffer_info[i];
1393
1394                 cleaned = true;
1395                 cleaned_count++;
1396                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1397                                DMA_FROM_DEVICE);
1398                 buffer_info->dma = 0;
1399
1400                 length = le16_to_cpu(rx_desc->wb.upper.length);
1401
1402                 /* errors is only valid for DD + EOP descriptors */
1403                 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1404                              (staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK))) {
1405                         /* recycle both page and skb */
1406                         buffer_info->skb = skb;
1407                         /* an error means any chain goes out the window too */
1408                         if (rx_ring->rx_skb_top)
1409                                 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1410                         rx_ring->rx_skb_top = NULL;
1411                         goto next_desc;
1412                 }
1413
1414 #define rxtop (rx_ring->rx_skb_top)
1415                 if (!(staterr & E1000_RXD_STAT_EOP)) {
1416                         /* this descriptor is only the beginning (or middle) */
1417                         if (!rxtop) {
1418                                 /* this is the beginning of a chain */
1419                                 rxtop = skb;
1420                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1421                                                    0, length);
1422                         } else {
1423                                 /* this is the middle of a chain */
1424                                 skb_fill_page_desc(rxtop,
1425                                     skb_shinfo(rxtop)->nr_frags,
1426                                     buffer_info->page, 0, length);
1427                                 /* re-use the skb, only consumed the page */
1428                                 buffer_info->skb = skb;
1429                         }
1430                         e1000_consume_page(buffer_info, rxtop, length);
1431                         goto next_desc;
1432                 } else {
1433                         if (rxtop) {
1434                                 /* end of the chain */
1435                                 skb_fill_page_desc(rxtop,
1436                                     skb_shinfo(rxtop)->nr_frags,
1437                                     buffer_info->page, 0, length);
1438                                 /* re-use the current skb, we only consumed the
1439                                  * page */
1440                                 buffer_info->skb = skb;
1441                                 skb = rxtop;
1442                                 rxtop = NULL;
1443                                 e1000_consume_page(buffer_info, skb, length);
1444                         } else {
1445                                 /* no chain, got EOP, this buf is the packet
1446                                  * copybreak to save the put_page/alloc_page */
1447                                 if (length <= copybreak &&
1448                                     skb_tailroom(skb) >= length) {
1449                                         u8 *vaddr;
1450                                         vaddr = kmap_atomic(buffer_info->page,
1451                                                            KM_SKB_DATA_SOFTIRQ);
1452                                         memcpy(skb_tail_pointer(skb), vaddr,
1453                                                length);
1454                                         kunmap_atomic(vaddr,
1455                                                       KM_SKB_DATA_SOFTIRQ);
1456                                         /* re-use the page, so don't erase
1457                                          * buffer_info->page */
1458                                         skb_put(skb, length);
1459                                 } else {
1460                                         skb_fill_page_desc(skb, 0,
1461                                                            buffer_info->page, 0,
1462                                                            length);
1463                                         e1000_consume_page(buffer_info, skb,
1464                                                            length);
1465                                 }
1466                         }
1467                 }
1468
1469                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1470                 e1000_rx_checksum(adapter, staterr,
1471                                   le16_to_cpu(rx_desc->wb.lower.hi_dword.
1472                                               csum_ip.csum), skb);
1473
1474                 /* probably a little skewed due to removing CRC */
1475                 total_rx_bytes += skb->len;
1476                 total_rx_packets++;
1477
1478                 /* eth type trans needs skb->data to point to something */
1479                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1480                         e_err("pskb_may_pull failed.\n");
1481                         dev_kfree_skb_irq(skb);
1482                         goto next_desc;
1483                 }
1484
1485                 e1000_receive_skb(adapter, netdev, skb, staterr,
1486                                   rx_desc->wb.upper.vlan);
1487
1488 next_desc:
1489                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1490
1491                 /* return some buffers to hardware, one at a time is too slow */
1492                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1493                         adapter->alloc_rx_buf(adapter, cleaned_count,
1494                                               GFP_ATOMIC);
1495                         cleaned_count = 0;
1496                 }
1497
1498                 /* use prefetched values */
1499                 rx_desc = next_rxd;
1500                 buffer_info = next_buffer;
1501
1502                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1503         }
1504         rx_ring->next_to_clean = i;
1505
1506         cleaned_count = e1000_desc_unused(rx_ring);
1507         if (cleaned_count)
1508                 adapter->alloc_rx_buf(adapter, cleaned_count, GFP_ATOMIC);
1509
1510         adapter->total_rx_bytes += total_rx_bytes;
1511         adapter->total_rx_packets += total_rx_packets;
1512         return cleaned;
1513 }
1514
1515 /**
1516  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1517  * @adapter: board private structure
1518  **/
1519 static void e1000_clean_rx_ring(struct e1000_adapter *adapter)
1520 {
1521         struct e1000_ring *rx_ring = adapter->rx_ring;
1522         struct e1000_buffer *buffer_info;
1523         struct e1000_ps_page *ps_page;
1524         struct pci_dev *pdev = adapter->pdev;
1525         unsigned int i, j;
1526
1527         /* Free all the Rx ring sk_buffs */
1528         for (i = 0; i < rx_ring->count; i++) {
1529                 buffer_info = &rx_ring->buffer_info[i];
1530                 if (buffer_info->dma) {
1531                         if (adapter->clean_rx == e1000_clean_rx_irq)
1532                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1533                                                  adapter->rx_buffer_len,
1534                                                  DMA_FROM_DEVICE);
1535                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1536                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1537                                                PAGE_SIZE,
1538                                                DMA_FROM_DEVICE);
1539                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1540                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1541                                                  adapter->rx_ps_bsize0,
1542                                                  DMA_FROM_DEVICE);
1543                         buffer_info->dma = 0;
1544                 }
1545
1546                 if (buffer_info->page) {
1547                         put_page(buffer_info->page);
1548                         buffer_info->page = NULL;
1549                 }
1550
1551                 if (buffer_info->skb) {
1552                         dev_kfree_skb(buffer_info->skb);
1553                         buffer_info->skb = NULL;
1554                 }
1555
1556                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1557                         ps_page = &buffer_info->ps_pages[j];
1558                         if (!ps_page->page)
1559                                 break;
1560                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1561                                        DMA_FROM_DEVICE);
1562                         ps_page->dma = 0;
1563                         put_page(ps_page->page);
1564                         ps_page->page = NULL;
1565                 }
1566         }
1567
1568         /* there also may be some cached data from a chained receive */
1569         if (rx_ring->rx_skb_top) {
1570                 dev_kfree_skb(rx_ring->rx_skb_top);
1571                 rx_ring->rx_skb_top = NULL;
1572         }
1573
1574         /* Zero out the descriptor ring */
1575         memset(rx_ring->desc, 0, rx_ring->size);
1576
1577         rx_ring->next_to_clean = 0;
1578         rx_ring->next_to_use = 0;
1579         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1580
1581         writel(0, adapter->hw.hw_addr + rx_ring->head);
1582         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1583 }
1584
1585 static void e1000e_downshift_workaround(struct work_struct *work)
1586 {
1587         struct e1000_adapter *adapter = container_of(work,
1588                                         struct e1000_adapter, downshift_task);
1589
1590         if (test_bit(__E1000_DOWN, &adapter->state))
1591                 return;
1592
1593         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1594 }
1595
1596 /**
1597  * e1000_intr_msi - Interrupt Handler
1598  * @irq: interrupt number
1599  * @data: pointer to a network interface device structure
1600  **/
1601 static irqreturn_t e1000_intr_msi(int irq, void *data)
1602 {
1603         struct net_device *netdev = data;
1604         struct e1000_adapter *adapter = netdev_priv(netdev);
1605         struct e1000_hw *hw = &adapter->hw;
1606         u32 icr = er32(ICR);
1607
1608         /*
1609          * read ICR disables interrupts using IAM
1610          */
1611
1612         if (icr & E1000_ICR_LSC) {
1613                 hw->mac.get_link_status = 1;
1614                 /*
1615                  * ICH8 workaround-- Call gig speed drop workaround on cable
1616                  * disconnect (LSC) before accessing any PHY registers
1617                  */
1618                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1619                     (!(er32(STATUS) & E1000_STATUS_LU)))
1620                         schedule_work(&adapter->downshift_task);
1621
1622                 /*
1623                  * 80003ES2LAN workaround-- For packet buffer work-around on
1624                  * link down event; disable receives here in the ISR and reset
1625                  * adapter in watchdog
1626                  */
1627                 if (netif_carrier_ok(netdev) &&
1628                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1629                         /* disable receives */
1630                         u32 rctl = er32(RCTL);
1631                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1632                         adapter->flags |= FLAG_RX_RESTART_NOW;
1633                 }
1634                 /* guard against interrupt when we're going down */
1635                 if (!test_bit(__E1000_DOWN, &adapter->state))
1636                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1637         }
1638
1639         if (napi_schedule_prep(&adapter->napi)) {
1640                 adapter->total_tx_bytes = 0;
1641                 adapter->total_tx_packets = 0;
1642                 adapter->total_rx_bytes = 0;
1643                 adapter->total_rx_packets = 0;
1644                 __napi_schedule(&adapter->napi);
1645         }
1646
1647         return IRQ_HANDLED;
1648 }
1649
1650 /**
1651  * e1000_intr - Interrupt Handler
1652  * @irq: interrupt number
1653  * @data: pointer to a network interface device structure
1654  **/
1655 static irqreturn_t e1000_intr(int irq, void *data)
1656 {
1657         struct net_device *netdev = data;
1658         struct e1000_adapter *adapter = netdev_priv(netdev);
1659         struct e1000_hw *hw = &adapter->hw;
1660         u32 rctl, icr = er32(ICR);
1661
1662         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1663                 return IRQ_NONE;  /* Not our interrupt */
1664
1665         /*
1666          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1667          * not set, then the adapter didn't send an interrupt
1668          */
1669         if (!(icr & E1000_ICR_INT_ASSERTED))
1670                 return IRQ_NONE;
1671
1672         /*
1673          * Interrupt Auto-Mask...upon reading ICR,
1674          * interrupts are masked.  No need for the
1675          * IMC write
1676          */
1677
1678         if (icr & E1000_ICR_LSC) {
1679                 hw->mac.get_link_status = 1;
1680                 /*
1681                  * ICH8 workaround-- Call gig speed drop workaround on cable
1682                  * disconnect (LSC) before accessing any PHY registers
1683                  */
1684                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1685                     (!(er32(STATUS) & E1000_STATUS_LU)))
1686                         schedule_work(&adapter->downshift_task);
1687
1688                 /*
1689                  * 80003ES2LAN workaround--
1690                  * For packet buffer work-around on link down event;
1691                  * disable receives here in the ISR and
1692                  * reset adapter in watchdog
1693                  */
1694                 if (netif_carrier_ok(netdev) &&
1695                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1696                         /* disable receives */
1697                         rctl = er32(RCTL);
1698                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1699                         adapter->flags |= FLAG_RX_RESTART_NOW;
1700                 }
1701                 /* guard against interrupt when we're going down */
1702                 if (!test_bit(__E1000_DOWN, &adapter->state))
1703                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1704         }
1705
1706         if (napi_schedule_prep(&adapter->napi)) {
1707                 adapter->total_tx_bytes = 0;
1708                 adapter->total_tx_packets = 0;
1709                 adapter->total_rx_bytes = 0;
1710                 adapter->total_rx_packets = 0;
1711                 __napi_schedule(&adapter->napi);
1712         }
1713
1714         return IRQ_HANDLED;
1715 }
1716
1717 static irqreturn_t e1000_msix_other(int irq, void *data)
1718 {
1719         struct net_device *netdev = data;
1720         struct e1000_adapter *adapter = netdev_priv(netdev);
1721         struct e1000_hw *hw = &adapter->hw;
1722         u32 icr = er32(ICR);
1723
1724         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1725                 if (!test_bit(__E1000_DOWN, &adapter->state))
1726                         ew32(IMS, E1000_IMS_OTHER);
1727                 return IRQ_NONE;
1728         }
1729
1730         if (icr & adapter->eiac_mask)
1731                 ew32(ICS, (icr & adapter->eiac_mask));
1732
1733         if (icr & E1000_ICR_OTHER) {
1734                 if (!(icr & E1000_ICR_LSC))
1735                         goto no_link_interrupt;
1736                 hw->mac.get_link_status = 1;
1737                 /* guard against interrupt when we're going down */
1738                 if (!test_bit(__E1000_DOWN, &adapter->state))
1739                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1740         }
1741
1742 no_link_interrupt:
1743         if (!test_bit(__E1000_DOWN, &adapter->state))
1744                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1745
1746         return IRQ_HANDLED;
1747 }
1748
1749
1750 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1751 {
1752         struct net_device *netdev = data;
1753         struct e1000_adapter *adapter = netdev_priv(netdev);
1754         struct e1000_hw *hw = &adapter->hw;
1755         struct e1000_ring *tx_ring = adapter->tx_ring;
1756
1757
1758         adapter->total_tx_bytes = 0;
1759         adapter->total_tx_packets = 0;
1760
1761         if (!e1000_clean_tx_irq(adapter))
1762                 /* Ring was not completely cleaned, so fire another interrupt */
1763                 ew32(ICS, tx_ring->ims_val);
1764
1765         return IRQ_HANDLED;
1766 }
1767
1768 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1769 {
1770         struct net_device *netdev = data;
1771         struct e1000_adapter *adapter = netdev_priv(netdev);
1772
1773         /* Write the ITR value calculated at the end of the
1774          * previous interrupt.
1775          */
1776         if (adapter->rx_ring->set_itr) {
1777                 writel(1000000000 / (adapter->rx_ring->itr_val * 256),
1778                        adapter->hw.hw_addr + adapter->rx_ring->itr_register);
1779                 adapter->rx_ring->set_itr = 0;
1780         }
1781
1782         if (napi_schedule_prep(&adapter->napi)) {
1783                 adapter->total_rx_bytes = 0;
1784                 adapter->total_rx_packets = 0;
1785                 __napi_schedule(&adapter->napi);
1786         }
1787         return IRQ_HANDLED;
1788 }
1789
1790 /**
1791  * e1000_configure_msix - Configure MSI-X hardware
1792  *
1793  * e1000_configure_msix sets up the hardware to properly
1794  * generate MSI-X interrupts.
1795  **/
1796 static void e1000_configure_msix(struct e1000_adapter *adapter)
1797 {
1798         struct e1000_hw *hw = &adapter->hw;
1799         struct e1000_ring *rx_ring = adapter->rx_ring;
1800         struct e1000_ring *tx_ring = adapter->tx_ring;
1801         int vector = 0;
1802         u32 ctrl_ext, ivar = 0;
1803
1804         adapter->eiac_mask = 0;
1805
1806         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1807         if (hw->mac.type == e1000_82574) {
1808                 u32 rfctl = er32(RFCTL);
1809                 rfctl |= E1000_RFCTL_ACK_DIS;
1810                 ew32(RFCTL, rfctl);
1811         }
1812
1813 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1814         /* Configure Rx vector */
1815         rx_ring->ims_val = E1000_IMS_RXQ0;
1816         adapter->eiac_mask |= rx_ring->ims_val;
1817         if (rx_ring->itr_val)
1818                 writel(1000000000 / (rx_ring->itr_val * 256),
1819                        hw->hw_addr + rx_ring->itr_register);
1820         else
1821                 writel(1, hw->hw_addr + rx_ring->itr_register);
1822         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1823
1824         /* Configure Tx vector */
1825         tx_ring->ims_val = E1000_IMS_TXQ0;
1826         vector++;
1827         if (tx_ring->itr_val)
1828                 writel(1000000000 / (tx_ring->itr_val * 256),
1829                        hw->hw_addr + tx_ring->itr_register);
1830         else
1831                 writel(1, hw->hw_addr + tx_ring->itr_register);
1832         adapter->eiac_mask |= tx_ring->ims_val;
1833         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1834
1835         /* set vector for Other Causes, e.g. link changes */
1836         vector++;
1837         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1838         if (rx_ring->itr_val)
1839                 writel(1000000000 / (rx_ring->itr_val * 256),
1840                        hw->hw_addr + E1000_EITR_82574(vector));
1841         else
1842                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1843
1844         /* Cause Tx interrupts on every write back */
1845         ivar |= (1 << 31);
1846
1847         ew32(IVAR, ivar);
1848
1849         /* enable MSI-X PBA support */
1850         ctrl_ext = er32(CTRL_EXT);
1851         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1852
1853         /* Auto-Mask Other interrupts upon ICR read */
1854 #define E1000_EIAC_MASK_82574   0x01F00000
1855         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1856         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1857         ew32(CTRL_EXT, ctrl_ext);
1858         e1e_flush();
1859 }
1860
1861 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1862 {
1863         if (adapter->msix_entries) {
1864                 pci_disable_msix(adapter->pdev);
1865                 kfree(adapter->msix_entries);
1866                 adapter->msix_entries = NULL;
1867         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1868                 pci_disable_msi(adapter->pdev);
1869                 adapter->flags &= ~FLAG_MSI_ENABLED;
1870         }
1871 }
1872
1873 /**
1874  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1875  *
1876  * Attempt to configure interrupts using the best available
1877  * capabilities of the hardware and kernel.
1878  **/
1879 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1880 {
1881         int err;
1882         int i;
1883
1884         switch (adapter->int_mode) {
1885         case E1000E_INT_MODE_MSIX:
1886                 if (adapter->flags & FLAG_HAS_MSIX) {
1887                         adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
1888                         adapter->msix_entries = kcalloc(adapter->num_vectors,
1889                                                       sizeof(struct msix_entry),
1890                                                       GFP_KERNEL);
1891                         if (adapter->msix_entries) {
1892                                 for (i = 0; i < adapter->num_vectors; i++)
1893                                         adapter->msix_entries[i].entry = i;
1894
1895                                 err = pci_enable_msix(adapter->pdev,
1896                                                       adapter->msix_entries,
1897                                                       adapter->num_vectors);
1898                                 if (err == 0)
1899                                         return;
1900                         }
1901                         /* MSI-X failed, so fall through and try MSI */
1902                         e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
1903                         e1000e_reset_interrupt_capability(adapter);
1904                 }
1905                 adapter->int_mode = E1000E_INT_MODE_MSI;
1906                 /* Fall through */
1907         case E1000E_INT_MODE_MSI:
1908                 if (!pci_enable_msi(adapter->pdev)) {
1909                         adapter->flags |= FLAG_MSI_ENABLED;
1910                 } else {
1911                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1912                         e_err("Failed to initialize MSI interrupts.  Falling back to legacy interrupts.\n");
1913                 }
1914                 /* Fall through */
1915         case E1000E_INT_MODE_LEGACY:
1916                 /* Don't do anything; this is the system default */
1917                 break;
1918         }
1919
1920         /* store the number of vectors being used */
1921         adapter->num_vectors = 1;
1922 }
1923
1924 /**
1925  * e1000_request_msix - Initialize MSI-X interrupts
1926  *
1927  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1928  * kernel.
1929  **/
1930 static int e1000_request_msix(struct e1000_adapter *adapter)
1931 {
1932         struct net_device *netdev = adapter->netdev;
1933         int err = 0, vector = 0;
1934
1935         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1936                 snprintf(adapter->rx_ring->name,
1937                          sizeof(adapter->rx_ring->name) - 1,
1938                          "%s-rx-0", netdev->name);
1939         else
1940                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1941         err = request_irq(adapter->msix_entries[vector].vector,
1942                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1943                           netdev);
1944         if (err)
1945                 goto out;
1946         adapter->rx_ring->itr_register = E1000_EITR_82574(vector);
1947         adapter->rx_ring->itr_val = adapter->itr;
1948         vector++;
1949
1950         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1951                 snprintf(adapter->tx_ring->name,
1952                          sizeof(adapter->tx_ring->name) - 1,
1953                          "%s-tx-0", netdev->name);
1954         else
1955                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
1956         err = request_irq(adapter->msix_entries[vector].vector,
1957                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
1958                           netdev);
1959         if (err)
1960                 goto out;
1961         adapter->tx_ring->itr_register = E1000_EITR_82574(vector);
1962         adapter->tx_ring->itr_val = adapter->itr;
1963         vector++;
1964
1965         err = request_irq(adapter->msix_entries[vector].vector,
1966                           e1000_msix_other, 0, netdev->name, netdev);
1967         if (err)
1968                 goto out;
1969
1970         e1000_configure_msix(adapter);
1971         return 0;
1972 out:
1973         return err;
1974 }
1975
1976 /**
1977  * e1000_request_irq - initialize interrupts
1978  *
1979  * Attempts to configure interrupts using the best available
1980  * capabilities of the hardware and kernel.
1981  **/
1982 static int e1000_request_irq(struct e1000_adapter *adapter)
1983 {
1984         struct net_device *netdev = adapter->netdev;
1985         int err;
1986
1987         if (adapter->msix_entries) {
1988                 err = e1000_request_msix(adapter);
1989                 if (!err)
1990                         return err;
1991                 /* fall back to MSI */
1992                 e1000e_reset_interrupt_capability(adapter);
1993                 adapter->int_mode = E1000E_INT_MODE_MSI;
1994                 e1000e_set_interrupt_capability(adapter);
1995         }
1996         if (adapter->flags & FLAG_MSI_ENABLED) {
1997                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
1998                                   netdev->name, netdev);
1999                 if (!err)
2000                         return err;
2001
2002                 /* fall back to legacy interrupt */
2003                 e1000e_reset_interrupt_capability(adapter);
2004                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2005         }
2006
2007         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2008                           netdev->name, netdev);
2009         if (err)
2010                 e_err("Unable to allocate interrupt, Error: %d\n", err);
2011
2012         return err;
2013 }
2014
2015 static void e1000_free_irq(struct e1000_adapter *adapter)
2016 {
2017         struct net_device *netdev = adapter->netdev;
2018
2019         if (adapter->msix_entries) {
2020                 int vector = 0;
2021
2022                 free_irq(adapter->msix_entries[vector].vector, netdev);
2023                 vector++;
2024
2025                 free_irq(adapter->msix_entries[vector].vector, netdev);
2026                 vector++;
2027
2028                 /* Other Causes interrupt vector */
2029                 free_irq(adapter->msix_entries[vector].vector, netdev);
2030                 return;
2031         }
2032
2033         free_irq(adapter->pdev->irq, netdev);
2034 }
2035
2036 /**
2037  * e1000_irq_disable - Mask off interrupt generation on the NIC
2038  **/
2039 static void e1000_irq_disable(struct e1000_adapter *adapter)
2040 {
2041         struct e1000_hw *hw = &adapter->hw;
2042
2043         ew32(IMC, ~0);
2044         if (adapter->msix_entries)
2045                 ew32(EIAC_82574, 0);
2046         e1e_flush();
2047
2048         if (adapter->msix_entries) {
2049                 int i;
2050                 for (i = 0; i < adapter->num_vectors; i++)
2051                         synchronize_irq(adapter->msix_entries[i].vector);
2052         } else {
2053                 synchronize_irq(adapter->pdev->irq);
2054         }
2055 }
2056
2057 /**
2058  * e1000_irq_enable - Enable default interrupt generation settings
2059  **/
2060 static void e1000_irq_enable(struct e1000_adapter *adapter)
2061 {
2062         struct e1000_hw *hw = &adapter->hw;
2063
2064         if (adapter->msix_entries) {
2065                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2066                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2067         } else {
2068                 ew32(IMS, IMS_ENABLE_MASK);
2069         }
2070         e1e_flush();
2071 }
2072
2073 /**
2074  * e1000e_get_hw_control - get control of the h/w from f/w
2075  * @adapter: address of board private structure
2076  *
2077  * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2078  * For ASF and Pass Through versions of f/w this means that
2079  * the driver is loaded. For AMT version (only with 82573)
2080  * of the f/w this means that the network i/f is open.
2081  **/
2082 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2083 {
2084         struct e1000_hw *hw = &adapter->hw;
2085         u32 ctrl_ext;
2086         u32 swsm;
2087
2088         /* Let firmware know the driver has taken over */
2089         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2090                 swsm = er32(SWSM);
2091                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2092         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2093                 ctrl_ext = er32(CTRL_EXT);
2094                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2095         }
2096 }
2097
2098 /**
2099  * e1000e_release_hw_control - release control of the h/w to f/w
2100  * @adapter: address of board private structure
2101  *
2102  * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2103  * For ASF and Pass Through versions of f/w this means that the
2104  * driver is no longer loaded. For AMT version (only with 82573) i
2105  * of the f/w this means that the network i/f is closed.
2106  *
2107  **/
2108 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2109 {
2110         struct e1000_hw *hw = &adapter->hw;
2111         u32 ctrl_ext;
2112         u32 swsm;
2113
2114         /* Let firmware taken over control of h/w */
2115         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2116                 swsm = er32(SWSM);
2117                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2118         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2119                 ctrl_ext = er32(CTRL_EXT);
2120                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2121         }
2122 }
2123
2124 /**
2125  * @e1000_alloc_ring - allocate memory for a ring structure
2126  **/
2127 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2128                                 struct e1000_ring *ring)
2129 {
2130         struct pci_dev *pdev = adapter->pdev;
2131
2132         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2133                                         GFP_KERNEL);
2134         if (!ring->desc)
2135                 return -ENOMEM;
2136
2137         return 0;
2138 }
2139
2140 /**
2141  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2142  * @adapter: board private structure
2143  *
2144  * Return 0 on success, negative on failure
2145  **/
2146 int e1000e_setup_tx_resources(struct e1000_adapter *adapter)
2147 {
2148         struct e1000_ring *tx_ring = adapter->tx_ring;
2149         int err = -ENOMEM, size;
2150
2151         size = sizeof(struct e1000_buffer) * tx_ring->count;
2152         tx_ring->buffer_info = vzalloc(size);
2153         if (!tx_ring->buffer_info)
2154                 goto err;
2155
2156         /* round up to nearest 4K */
2157         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2158         tx_ring->size = ALIGN(tx_ring->size, 4096);
2159
2160         err = e1000_alloc_ring_dma(adapter, tx_ring);
2161         if (err)
2162                 goto err;
2163
2164         tx_ring->next_to_use = 0;
2165         tx_ring->next_to_clean = 0;
2166
2167         return 0;
2168 err:
2169         vfree(tx_ring->buffer_info);
2170         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2171         return err;
2172 }
2173
2174 /**
2175  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2176  * @adapter: board private structure
2177  *
2178  * Returns 0 on success, negative on failure
2179  **/
2180 int e1000e_setup_rx_resources(struct e1000_adapter *adapter)
2181 {
2182         struct e1000_ring *rx_ring = adapter->rx_ring;
2183         struct e1000_buffer *buffer_info;
2184         int i, size, desc_len, err = -ENOMEM;
2185
2186         size = sizeof(struct e1000_buffer) * rx_ring->count;
2187         rx_ring->buffer_info = vzalloc(size);
2188         if (!rx_ring->buffer_info)
2189                 goto err;
2190
2191         for (i = 0; i < rx_ring->count; i++) {
2192                 buffer_info = &rx_ring->buffer_info[i];
2193                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2194                                                 sizeof(struct e1000_ps_page),
2195                                                 GFP_KERNEL);
2196                 if (!buffer_info->ps_pages)
2197                         goto err_pages;
2198         }
2199
2200         desc_len = sizeof(union e1000_rx_desc_packet_split);
2201
2202         /* Round up to nearest 4K */
2203         rx_ring->size = rx_ring->count * desc_len;
2204         rx_ring->size = ALIGN(rx_ring->size, 4096);
2205
2206         err = e1000_alloc_ring_dma(adapter, rx_ring);
2207         if (err)
2208                 goto err_pages;
2209
2210         rx_ring->next_to_clean = 0;
2211         rx_ring->next_to_use = 0;
2212         rx_ring->rx_skb_top = NULL;
2213
2214         return 0;
2215
2216 err_pages:
2217         for (i = 0; i < rx_ring->count; i++) {
2218                 buffer_info = &rx_ring->buffer_info[i];
2219                 kfree(buffer_info->ps_pages);
2220         }
2221 err:
2222         vfree(rx_ring->buffer_info);
2223         e_err("Unable to allocate memory for the receive descriptor ring\n");
2224         return err;
2225 }
2226
2227 /**
2228  * e1000_clean_tx_ring - Free Tx Buffers
2229  * @adapter: board private structure
2230  **/
2231 static void e1000_clean_tx_ring(struct e1000_adapter *adapter)
2232 {
2233         struct e1000_ring *tx_ring = adapter->tx_ring;
2234         struct e1000_buffer *buffer_info;
2235         unsigned long size;
2236         unsigned int i;
2237
2238         for (i = 0; i < tx_ring->count; i++) {
2239                 buffer_info = &tx_ring->buffer_info[i];
2240                 e1000_put_txbuf(adapter, buffer_info);
2241         }
2242
2243         size = sizeof(struct e1000_buffer) * tx_ring->count;
2244         memset(tx_ring->buffer_info, 0, size);
2245
2246         memset(tx_ring->desc, 0, tx_ring->size);
2247
2248         tx_ring->next_to_use = 0;
2249         tx_ring->next_to_clean = 0;
2250
2251         writel(0, adapter->hw.hw_addr + tx_ring->head);
2252         writel(0, adapter->hw.hw_addr + tx_ring->tail);
2253 }
2254
2255 /**
2256  * e1000e_free_tx_resources - Free Tx Resources per Queue
2257  * @adapter: board private structure
2258  *
2259  * Free all transmit software resources
2260  **/
2261 void e1000e_free_tx_resources(struct e1000_adapter *adapter)
2262 {
2263         struct pci_dev *pdev = adapter->pdev;
2264         struct e1000_ring *tx_ring = adapter->tx_ring;
2265
2266         e1000_clean_tx_ring(adapter);
2267
2268         vfree(tx_ring->buffer_info);
2269         tx_ring->buffer_info = NULL;
2270
2271         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2272                           tx_ring->dma);
2273         tx_ring->desc = NULL;
2274 }
2275
2276 /**
2277  * e1000e_free_rx_resources - Free Rx Resources
2278  * @adapter: board private structure
2279  *
2280  * Free all receive software resources
2281  **/
2282
2283 void e1000e_free_rx_resources(struct e1000_adapter *adapter)
2284 {
2285         struct pci_dev *pdev = adapter->pdev;
2286         struct e1000_ring *rx_ring = adapter->rx_ring;
2287         int i;
2288
2289         e1000_clean_rx_ring(adapter);
2290
2291         for (i = 0; i < rx_ring->count; i++)
2292                 kfree(rx_ring->buffer_info[i].ps_pages);
2293
2294         vfree(rx_ring->buffer_info);
2295         rx_ring->buffer_info = NULL;
2296
2297         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2298                           rx_ring->dma);
2299         rx_ring->desc = NULL;
2300 }
2301
2302 /**
2303  * e1000_update_itr - update the dynamic ITR value based on statistics
2304  * @adapter: pointer to adapter
2305  * @itr_setting: current adapter->itr
2306  * @packets: the number of packets during this measurement interval
2307  * @bytes: the number of bytes during this measurement interval
2308  *
2309  *      Stores a new ITR value based on packets and byte
2310  *      counts during the last interrupt.  The advantage of per interrupt
2311  *      computation is faster updates and more accurate ITR for the current
2312  *      traffic pattern.  Constants in this function were computed
2313  *      based on theoretical maximum wire speed and thresholds were set based
2314  *      on testing data as well as attempting to minimize response time
2315  *      while increasing bulk throughput.  This functionality is controlled
2316  *      by the InterruptThrottleRate module parameter.
2317  **/
2318 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2319                                      u16 itr_setting, int packets,
2320                                      int bytes)
2321 {
2322         unsigned int retval = itr_setting;
2323
2324         if (packets == 0)
2325                 goto update_itr_done;
2326
2327         switch (itr_setting) {
2328         case lowest_latency:
2329                 /* handle TSO and jumbo frames */
2330                 if (bytes/packets > 8000)
2331                         retval = bulk_latency;
2332                 else if ((packets < 5) && (bytes > 512))
2333                         retval = low_latency;
2334                 break;
2335         case low_latency:  /* 50 usec aka 20000 ints/s */
2336                 if (bytes > 10000) {
2337                         /* this if handles the TSO accounting */
2338                         if (bytes/packets > 8000)
2339                                 retval = bulk_latency;
2340                         else if ((packets < 10) || ((bytes/packets) > 1200))
2341                                 retval = bulk_latency;
2342                         else if ((packets > 35))
2343                                 retval = lowest_latency;
2344                 } else if (bytes/packets > 2000) {
2345                         retval = bulk_latency;
2346                 } else if (packets <= 2 && bytes < 512) {
2347                         retval = lowest_latency;
2348                 }
2349                 break;
2350         case bulk_latency: /* 250 usec aka 4000 ints/s */
2351                 if (bytes > 25000) {
2352                         if (packets > 35)
2353                                 retval = low_latency;
2354                 } else if (bytes < 6000) {
2355                         retval = low_latency;
2356                 }
2357                 break;
2358         }
2359
2360 update_itr_done:
2361         return retval;
2362 }
2363
2364 static void e1000_set_itr(struct e1000_adapter *adapter)
2365 {
2366         struct e1000_hw *hw = &adapter->hw;
2367         u16 current_itr;
2368         u32 new_itr = adapter->itr;
2369
2370         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2371         if (adapter->link_speed != SPEED_1000) {
2372                 current_itr = 0;
2373                 new_itr = 4000;
2374                 goto set_itr_now;
2375         }
2376
2377         if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2378                 new_itr = 0;
2379                 goto set_itr_now;
2380         }
2381
2382         adapter->tx_itr = e1000_update_itr(adapter,
2383                                     adapter->tx_itr,
2384                                     adapter->total_tx_packets,
2385                                     adapter->total_tx_bytes);
2386         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2387         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2388                 adapter->tx_itr = low_latency;
2389
2390         adapter->rx_itr = e1000_update_itr(adapter,
2391                                     adapter->rx_itr,
2392                                     adapter->total_rx_packets,
2393                                     adapter->total_rx_bytes);
2394         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2395         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2396                 adapter->rx_itr = low_latency;
2397
2398         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2399
2400         switch (current_itr) {
2401         /* counts and packets in update_itr are dependent on these numbers */
2402         case lowest_latency:
2403                 new_itr = 70000;
2404                 break;
2405         case low_latency:
2406                 new_itr = 20000; /* aka hwitr = ~200 */
2407                 break;
2408         case bulk_latency:
2409                 new_itr = 4000;
2410                 break;
2411         default:
2412                 break;
2413         }
2414
2415 set_itr_now:
2416         if (new_itr != adapter->itr) {
2417                 /*
2418                  * this attempts to bias the interrupt rate towards Bulk
2419                  * by adding intermediate steps when interrupt rate is
2420                  * increasing
2421                  */
2422                 new_itr = new_itr > adapter->itr ?
2423                              min(adapter->itr + (new_itr >> 2), new_itr) :
2424                              new_itr;
2425                 adapter->itr = new_itr;
2426                 adapter->rx_ring->itr_val = new_itr;
2427                 if (adapter->msix_entries)
2428                         adapter->rx_ring->set_itr = 1;
2429                 else
2430                         if (new_itr)
2431                                 ew32(ITR, 1000000000 / (new_itr * 256));
2432                         else
2433                                 ew32(ITR, 0);
2434         }
2435 }
2436
2437 /**
2438  * e1000_alloc_queues - Allocate memory for all rings
2439  * @adapter: board private structure to initialize
2440  **/
2441 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
2442 {
2443         adapter->tx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2444         if (!adapter->tx_ring)
2445                 goto err;
2446
2447         adapter->rx_ring = kzalloc(sizeof(struct e1000_ring), GFP_KERNEL);
2448         if (!adapter->rx_ring)
2449                 goto err;
2450
2451         return 0;
2452 err:
2453         e_err("Unable to allocate memory for queues\n");
2454         kfree(adapter->rx_ring);
2455         kfree(adapter->tx_ring);
2456         return -ENOMEM;
2457 }
2458
2459 /**
2460  * e1000_clean - NAPI Rx polling callback
2461  * @napi: struct associated with this polling callback
2462  * @budget: amount of packets driver is allowed to process this poll
2463  **/
2464 static int e1000_clean(struct napi_struct *napi, int budget)
2465 {
2466         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
2467         struct e1000_hw *hw = &adapter->hw;
2468         struct net_device *poll_dev = adapter->netdev;
2469         int tx_cleaned = 1, work_done = 0;
2470
2471         adapter = netdev_priv(poll_dev);
2472
2473         if (adapter->msix_entries &&
2474             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2475                 goto clean_rx;
2476
2477         tx_cleaned = e1000_clean_tx_irq(adapter);
2478
2479 clean_rx:
2480         adapter->clean_rx(adapter, &work_done, budget);
2481
2482         if (!tx_cleaned)
2483                 work_done = budget;
2484
2485         /* If budget not fully consumed, exit the polling mode */
2486         if (work_done < budget) {
2487                 if (adapter->itr_setting & 3)
2488                         e1000_set_itr(adapter);
2489                 napi_complete(napi);
2490                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2491                         if (adapter->msix_entries)
2492                                 ew32(IMS, adapter->rx_ring->ims_val);
2493                         else
2494                                 e1000_irq_enable(adapter);
2495                 }
2496         }
2497
2498         return work_done;
2499 }
2500
2501 static void e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2502 {
2503         struct e1000_adapter *adapter = netdev_priv(netdev);
2504         struct e1000_hw *hw = &adapter->hw;
2505         u32 vfta, index;
2506
2507         /* don't update vlan cookie if already programmed */
2508         if ((adapter->hw.mng_cookie.status &
2509              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2510             (vid == adapter->mng_vlan_id))
2511                 return;
2512
2513         /* add VID to filter table */
2514         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2515                 index = (vid >> 5) & 0x7F;
2516                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2517                 vfta |= (1 << (vid & 0x1F));
2518                 hw->mac.ops.write_vfta(hw, index, vfta);
2519         }
2520
2521         set_bit(vid, adapter->active_vlans);
2522 }
2523
2524 static void e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2525 {
2526         struct e1000_adapter *adapter = netdev_priv(netdev);
2527         struct e1000_hw *hw = &adapter->hw;
2528         u32 vfta, index;
2529
2530         if ((adapter->hw.mng_cookie.status &
2531              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2532             (vid == adapter->mng_vlan_id)) {
2533                 /* release control to f/w */
2534                 e1000e_release_hw_control(adapter);
2535                 return;
2536         }
2537
2538         /* remove VID from filter table */
2539         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2540                 index = (vid >> 5) & 0x7F;
2541                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2542                 vfta &= ~(1 << (vid & 0x1F));
2543                 hw->mac.ops.write_vfta(hw, index, vfta);
2544         }
2545
2546         clear_bit(vid, adapter->active_vlans);
2547 }
2548
2549 /**
2550  * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2551  * @adapter: board private structure to initialize
2552  **/
2553 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2554 {
2555         struct net_device *netdev = adapter->netdev;
2556         struct e1000_hw *hw = &adapter->hw;
2557         u32 rctl;
2558
2559         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2560                 /* disable VLAN receive filtering */
2561                 rctl = er32(RCTL);
2562                 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2563                 ew32(RCTL, rctl);
2564
2565                 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2566                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2567                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2568                 }
2569         }
2570 }
2571
2572 /**
2573  * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2574  * @adapter: board private structure to initialize
2575  **/
2576 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2577 {
2578         struct e1000_hw *hw = &adapter->hw;
2579         u32 rctl;
2580
2581         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2582                 /* enable VLAN receive filtering */
2583                 rctl = er32(RCTL);
2584                 rctl |= E1000_RCTL_VFE;
2585                 rctl &= ~E1000_RCTL_CFIEN;
2586                 ew32(RCTL, rctl);
2587         }
2588 }
2589
2590 /**
2591  * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2592  * @adapter: board private structure to initialize
2593  **/
2594 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2595 {
2596         struct e1000_hw *hw = &adapter->hw;
2597         u32 ctrl;
2598
2599         /* disable VLAN tag insert/strip */
2600         ctrl = er32(CTRL);
2601         ctrl &= ~E1000_CTRL_VME;
2602         ew32(CTRL, ctrl);
2603 }
2604
2605 /**
2606  * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2607  * @adapter: board private structure to initialize
2608  **/
2609 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2610 {
2611         struct e1000_hw *hw = &adapter->hw;
2612         u32 ctrl;
2613
2614         /* enable VLAN tag insert/strip */
2615         ctrl = er32(CTRL);
2616         ctrl |= E1000_CTRL_VME;
2617         ew32(CTRL, ctrl);
2618 }
2619
2620 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2621 {
2622         struct net_device *netdev = adapter->netdev;
2623         u16 vid = adapter->hw.mng_cookie.vlan_id;
2624         u16 old_vid = adapter->mng_vlan_id;
2625
2626         if (adapter->hw.mng_cookie.status &
2627             E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2628                 e1000_vlan_rx_add_vid(netdev, vid);
2629                 adapter->mng_vlan_id = vid;
2630         }
2631
2632         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2633                 e1000_vlan_rx_kill_vid(netdev, old_vid);
2634 }
2635
2636 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2637 {
2638         u16 vid;
2639
2640         e1000_vlan_rx_add_vid(adapter->netdev, 0);
2641
2642         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2643                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2644 }
2645
2646 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2647 {
2648         struct e1000_hw *hw = &adapter->hw;
2649         u32 manc, manc2h, mdef, i, j;
2650
2651         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2652                 return;
2653
2654         manc = er32(MANC);
2655
2656         /*
2657          * enable receiving management packets to the host. this will probably
2658          * generate destination unreachable messages from the host OS, but
2659          * the packets will be handled on SMBUS
2660          */
2661         manc |= E1000_MANC_EN_MNG2HOST;
2662         manc2h = er32(MANC2H);
2663
2664         switch (hw->mac.type) {
2665         default:
2666                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2667                 break;
2668         case e1000_82574:
2669         case e1000_82583:
2670                 /*
2671                  * Check if IPMI pass-through decision filter already exists;
2672                  * if so, enable it.
2673                  */
2674                 for (i = 0, j = 0; i < 8; i++) {
2675                         mdef = er32(MDEF(i));
2676
2677                         /* Ignore filters with anything other than IPMI ports */
2678                         if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2679                                 continue;
2680
2681                         /* Enable this decision filter in MANC2H */
2682                         if (mdef)
2683                                 manc2h |= (1 << i);
2684
2685                         j |= mdef;
2686                 }
2687
2688                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2689                         break;
2690
2691                 /* Create new decision filter in an empty filter */
2692                 for (i = 0, j = 0; i < 8; i++)
2693                         if (er32(MDEF(i)) == 0) {
2694                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2695                                                E1000_MDEF_PORT_664));
2696                                 manc2h |= (1 << 1);
2697                                 j++;
2698                                 break;
2699                         }
2700
2701                 if (!j)
2702                         e_warn("Unable to create IPMI pass-through filter\n");
2703                 break;
2704         }
2705
2706         ew32(MANC2H, manc2h);
2707         ew32(MANC, manc);
2708 }
2709
2710 /**
2711  * e1000_configure_tx - Configure Transmit Unit after Reset
2712  * @adapter: board private structure
2713  *
2714  * Configure the Tx unit of the MAC after a reset.
2715  **/
2716 static void e1000_configure_tx(struct e1000_adapter *adapter)
2717 {
2718         struct e1000_hw *hw = &adapter->hw;
2719         struct e1000_ring *tx_ring = adapter->tx_ring;
2720         u64 tdba;
2721         u32 tdlen, tctl, tipg, tarc;
2722         u32 ipgr1, ipgr2;
2723
2724         /* Setup the HW Tx Head and Tail descriptor pointers */
2725         tdba = tx_ring->dma;
2726         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2727         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2728         ew32(TDBAH, (tdba >> 32));
2729         ew32(TDLEN, tdlen);
2730         ew32(TDH, 0);
2731         ew32(TDT, 0);
2732         tx_ring->head = E1000_TDH;
2733         tx_ring->tail = E1000_TDT;
2734
2735         /* Set the default values for the Tx Inter Packet Gap timer */
2736         tipg = DEFAULT_82543_TIPG_IPGT_COPPER;          /*  8  */
2737         ipgr1 = DEFAULT_82543_TIPG_IPGR1;               /*  8  */
2738         ipgr2 = DEFAULT_82543_TIPG_IPGR2;               /*  6  */
2739
2740         if (adapter->flags & FLAG_TIPG_MEDIUM_FOR_80003ESLAN)
2741                 ipgr2 = DEFAULT_80003ES2LAN_TIPG_IPGR2; /*  7  */
2742
2743         tipg |= ipgr1 << E1000_TIPG_IPGR1_SHIFT;
2744         tipg |= ipgr2 << E1000_TIPG_IPGR2_SHIFT;
2745         ew32(TIPG, tipg);
2746
2747         /* Set the Tx Interrupt Delay register */
2748         ew32(TIDV, adapter->tx_int_delay);
2749         /* Tx irq moderation */
2750         ew32(TADV, adapter->tx_abs_int_delay);
2751
2752         if (adapter->flags2 & FLAG2_DMA_BURST) {
2753                 u32 txdctl = er32(TXDCTL(0));
2754                 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2755                             E1000_TXDCTL_WTHRESH);
2756                 /*
2757                  * set up some performance related parameters to encourage the
2758                  * hardware to use the bus more efficiently in bursts, depends
2759                  * on the tx_int_delay to be enabled,
2760                  * wthresh = 5 ==> burst write a cacheline (64 bytes) at a time
2761                  * hthresh = 1 ==> prefetch when one or more available
2762                  * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2763                  * BEWARE: this seems to work but should be considered first if
2764                  * there are Tx hangs or other Tx related bugs
2765                  */
2766                 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2767                 ew32(TXDCTL(0), txdctl);
2768                 /* erratum work around: set txdctl the same for both queues */
2769                 ew32(TXDCTL(1), txdctl);
2770         }
2771
2772         /* Program the Transmit Control Register */
2773         tctl = er32(TCTL);
2774         tctl &= ~E1000_TCTL_CT;
2775         tctl |= E1000_TCTL_PSP | E1000_TCTL_RTLC |
2776                 (E1000_COLLISION_THRESHOLD << E1000_CT_SHIFT);
2777
2778         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2779                 tarc = er32(TARC(0));
2780                 /*
2781                  * set the speed mode bit, we'll clear it if we're not at
2782                  * gigabit link later
2783                  */
2784 #define SPEED_MODE_BIT (1 << 21)
2785                 tarc |= SPEED_MODE_BIT;
2786                 ew32(TARC(0), tarc);
2787         }
2788
2789         /* errata: program both queues to unweighted RR */
2790         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2791                 tarc = er32(TARC(0));
2792                 tarc |= 1;
2793                 ew32(TARC(0), tarc);
2794                 tarc = er32(TARC(1));
2795                 tarc |= 1;
2796                 ew32(TARC(1), tarc);
2797         }
2798
2799         /* Setup Transmit Descriptor Settings for eop descriptor */
2800         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2801
2802         /* only set IDE if we are delaying interrupts using the timers */
2803         if (adapter->tx_int_delay)
2804                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2805
2806         /* enable Report Status bit */
2807         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2808
2809         ew32(TCTL, tctl);
2810
2811         e1000e_config_collision_dist(hw);
2812 }
2813
2814 /**
2815  * e1000_setup_rctl - configure the receive control registers
2816  * @adapter: Board private structure
2817  **/
2818 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2819                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2820 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2821 {
2822         struct e1000_hw *hw = &adapter->hw;
2823         u32 rctl, rfctl;
2824         u32 pages = 0;
2825
2826         /* Workaround Si errata on 82579 - configure jumbo frame flow */
2827         if (hw->mac.type == e1000_pch2lan) {
2828                 s32 ret_val;
2829
2830                 if (adapter->netdev->mtu > ETH_DATA_LEN)
2831                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
2832                 else
2833                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
2834
2835                 if (ret_val)
2836                         e_dbg("failed to enable jumbo frame workaround mode\n");
2837         }
2838
2839         /* Program MC offset vector base */
2840         rctl = er32(RCTL);
2841         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2842         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2843                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2844                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2845
2846         /* Do not Store bad packets */
2847         rctl &= ~E1000_RCTL_SBP;
2848
2849         /* Enable Long Packet receive */
2850         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2851                 rctl &= ~E1000_RCTL_LPE;
2852         else
2853                 rctl |= E1000_RCTL_LPE;
2854
2855         /* Some systems expect that the CRC is included in SMBUS traffic. The
2856          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2857          * host memory when this is enabled
2858          */
2859         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2860                 rctl |= E1000_RCTL_SECRC;
2861
2862         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2863         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2864                 u16 phy_data;
2865
2866                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2867                 phy_data &= 0xfff8;
2868                 phy_data |= (1 << 2);
2869                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2870
2871                 e1e_rphy(hw, 22, &phy_data);
2872                 phy_data &= 0x0fff;
2873                 phy_data |= (1 << 14);
2874                 e1e_wphy(hw, 0x10, 0x2823);
2875                 e1e_wphy(hw, 0x11, 0x0003);
2876                 e1e_wphy(hw, 22, phy_data);
2877         }
2878
2879         /* Setup buffer sizes */
2880         rctl &= ~E1000_RCTL_SZ_4096;
2881         rctl |= E1000_RCTL_BSEX;
2882         switch (adapter->rx_buffer_len) {
2883         case 2048:
2884         default:
2885                 rctl |= E1000_RCTL_SZ_2048;
2886                 rctl &= ~E1000_RCTL_BSEX;
2887                 break;
2888         case 4096:
2889                 rctl |= E1000_RCTL_SZ_4096;
2890                 break;
2891         case 8192:
2892                 rctl |= E1000_RCTL_SZ_8192;
2893                 break;
2894         case 16384:
2895                 rctl |= E1000_RCTL_SZ_16384;
2896                 break;
2897         }
2898
2899         /* Enable Extended Status in all Receive Descriptors */
2900         rfctl = er32(RFCTL);
2901         rfctl |= E1000_RFCTL_EXTEN;
2902
2903         /*
2904          * 82571 and greater support packet-split where the protocol
2905          * header is placed in skb->data and the packet data is
2906          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2907          * In the case of a non-split, skb->data is linearly filled,
2908          * followed by the page buffers.  Therefore, skb->data is
2909          * sized to hold the largest protocol header.
2910          *
2911          * allocations using alloc_page take too long for regular MTU
2912          * so only enable packet split for jumbo frames
2913          *
2914          * Using pages when the page size is greater than 16k wastes
2915          * a lot of memory, since we allocate 3 pages at all times
2916          * per packet.
2917          */
2918         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2919         if (!(adapter->flags & FLAG_HAS_ERT) && (pages <= 3) &&
2920             (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2921                 adapter->rx_ps_pages = pages;
2922         else
2923                 adapter->rx_ps_pages = 0;
2924
2925         if (adapter->rx_ps_pages) {
2926                 u32 psrctl = 0;
2927
2928                 /*
2929                  * disable packet split support for IPv6 extension headers,
2930                  * because some malformed IPv6 headers can hang the Rx
2931                  */
2932                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2933                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2934
2935                 /* Enable Packet split descriptors */
2936                 rctl |= E1000_RCTL_DTYP_PS;
2937
2938                 psrctl |= adapter->rx_ps_bsize0 >>
2939                         E1000_PSRCTL_BSIZE0_SHIFT;
2940
2941                 switch (adapter->rx_ps_pages) {
2942                 case 3:
2943                         psrctl |= PAGE_SIZE <<
2944                                 E1000_PSRCTL_BSIZE3_SHIFT;
2945                 case 2:
2946                         psrctl |= PAGE_SIZE <<
2947                                 E1000_PSRCTL_BSIZE2_SHIFT;
2948                 case 1:
2949                         psrctl |= PAGE_SIZE >>
2950                                 E1000_PSRCTL_BSIZE1_SHIFT;
2951                         break;
2952                 }
2953
2954                 ew32(PSRCTL, psrctl);
2955         }
2956
2957         ew32(RFCTL, rfctl);
2958         ew32(RCTL, rctl);
2959         /* just started the receive unit, no need to restart */
2960         adapter->flags &= ~FLAG_RX_RESTART_NOW;
2961 }
2962
2963 /**
2964  * e1000_configure_rx - Configure Receive Unit after Reset
2965  * @adapter: board private structure
2966  *
2967  * Configure the Rx unit of the MAC after a reset.
2968  **/
2969 static void e1000_configure_rx(struct e1000_adapter *adapter)
2970 {
2971         struct e1000_hw *hw = &adapter->hw;
2972         struct e1000_ring *rx_ring = adapter->rx_ring;
2973         u64 rdba;
2974         u32 rdlen, rctl, rxcsum, ctrl_ext;
2975
2976         if (adapter->rx_ps_pages) {
2977                 /* this is a 32 byte descriptor */
2978                 rdlen = rx_ring->count *
2979                     sizeof(union e1000_rx_desc_packet_split);
2980                 adapter->clean_rx = e1000_clean_rx_irq_ps;
2981                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
2982         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
2983                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
2984                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
2985                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
2986         } else {
2987                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
2988                 adapter->clean_rx = e1000_clean_rx_irq;
2989                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
2990         }
2991
2992         /* disable receives while setting up the descriptors */
2993         rctl = er32(RCTL);
2994         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
2995                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
2996         e1e_flush();
2997         usleep_range(10000, 20000);
2998
2999         if (adapter->flags2 & FLAG2_DMA_BURST) {
3000                 /*
3001                  * set the writeback threshold (only takes effect if the RDTR
3002                  * is set). set GRAN=1 and write back up to 0x4 worth, and
3003                  * enable prefetching of 0x20 Rx descriptors
3004                  * granularity = 01
3005                  * wthresh = 04,
3006                  * hthresh = 04,
3007                  * pthresh = 0x20
3008                  */
3009                 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3010                 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3011
3012                 /*
3013                  * override the delay timers for enabling bursting, only if
3014                  * the value was not set by the user via module options
3015                  */
3016                 if (adapter->rx_int_delay == DEFAULT_RDTR)
3017                         adapter->rx_int_delay = BURST_RDTR;
3018                 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3019                         adapter->rx_abs_int_delay = BURST_RADV;
3020         }
3021
3022         /* set the Receive Delay Timer Register */
3023         ew32(RDTR, adapter->rx_int_delay);
3024
3025         /* irq moderation */
3026         ew32(RADV, adapter->rx_abs_int_delay);
3027         if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3028                 ew32(ITR, 1000000000 / (adapter->itr * 256));
3029
3030         ctrl_ext = er32(CTRL_EXT);
3031         /* Auto-Mask interrupts upon ICR access */
3032         ctrl_ext |= E1000_CTRL_EXT_IAME;
3033         ew32(IAM, 0xffffffff);
3034         ew32(CTRL_EXT, ctrl_ext);
3035         e1e_flush();
3036
3037         /*
3038          * Setup the HW Rx Head and Tail Descriptor Pointers and
3039          * the Base and Length of the Rx Descriptor Ring
3040          */
3041         rdba = rx_ring->dma;
3042         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
3043         ew32(RDBAH, (rdba >> 32));
3044         ew32(RDLEN, rdlen);
3045         ew32(RDH, 0);
3046         ew32(RDT, 0);
3047         rx_ring->head = E1000_RDH;
3048         rx_ring->tail = E1000_RDT;
3049
3050         /* Enable Receive Checksum Offload for TCP and UDP */
3051         rxcsum = er32(RXCSUM);
3052         if (adapter->netdev->features & NETIF_F_RXCSUM) {
3053                 rxcsum |= E1000_RXCSUM_TUOFL;
3054
3055                 /*
3056                  * IPv4 payload checksum for UDP fragments must be
3057                  * used in conjunction with packet-split.
3058                  */
3059                 if (adapter->rx_ps_pages)
3060                         rxcsum |= E1000_RXCSUM_IPPCSE;
3061         } else {
3062                 rxcsum &= ~E1000_RXCSUM_TUOFL;
3063                 /* no need to clear IPPCSE as it defaults to 0 */
3064         }
3065         ew32(RXCSUM, rxcsum);
3066
3067         /*
3068          * Enable early receives on supported devices, only takes effect when
3069          * packet size is equal or larger than the specified value (in 8 byte
3070          * units), e.g. using jumbo frames when setting to E1000_ERT_2048
3071          */
3072         if ((adapter->flags & FLAG_HAS_ERT) ||
3073             (adapter->hw.mac.type == e1000_pch2lan)) {
3074                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3075                         u32 rxdctl = er32(RXDCTL(0));
3076                         ew32(RXDCTL(0), rxdctl | 0x3);
3077                         if (adapter->flags & FLAG_HAS_ERT)
3078                                 ew32(ERT, E1000_ERT_2048 | (1 << 13));
3079                         /*
3080                          * With jumbo frames and early-receive enabled,
3081                          * excessive C-state transition latencies result in
3082                          * dropped transactions.
3083                          */
3084                         pm_qos_update_request(&adapter->netdev->pm_qos_req, 55);
3085                 } else {
3086                         pm_qos_update_request(&adapter->netdev->pm_qos_req,
3087                                               PM_QOS_DEFAULT_VALUE);
3088                 }
3089         }
3090
3091         /* Enable Receives */
3092         ew32(RCTL, rctl);
3093 }
3094
3095 /**
3096  * e1000e_write_mc_addr_list - write multicast addresses to MTA
3097  * @netdev: network interface device structure
3098  *
3099  * Writes multicast address list to the MTA hash table.
3100  * Returns: -ENOMEM on failure
3101  *                0 on no addresses written
3102  *                X on writing X addresses to MTA
3103  */
3104 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3105 {
3106         struct e1000_adapter *adapter = netdev_priv(netdev);
3107         struct e1000_hw *hw = &adapter->hw;
3108         struct netdev_hw_addr *ha;
3109         u8 *mta_list;
3110         int i;
3111
3112         if (netdev_mc_empty(netdev)) {
3113                 /* nothing to program, so clear mc list */
3114                 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3115                 return 0;
3116         }
3117
3118         mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3119         if (!mta_list)
3120                 return -ENOMEM;
3121
3122         /* update_mc_addr_list expects a packed array of only addresses. */
3123         i = 0;
3124         netdev_for_each_mc_addr(ha, netdev)
3125                 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3126
3127         hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3128         kfree(mta_list);
3129
3130         return netdev_mc_count(netdev);
3131 }
3132
3133 /**
3134  * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3135  * @netdev: network interface device structure
3136  *
3137  * Writes unicast address list to the RAR table.
3138  * Returns: -ENOMEM on failure/insufficient address space
3139  *                0 on no addresses written
3140  *                X on writing X addresses to the RAR table
3141  **/
3142 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3143 {
3144         struct e1000_adapter *adapter = netdev_priv(netdev);
3145         struct e1000_hw *hw = &adapter->hw;
3146         unsigned int rar_entries = hw->mac.rar_entry_count;
3147         int count = 0;
3148
3149         /* save a rar entry for our hardware address */
3150         rar_entries--;
3151
3152         /* save a rar entry for the LAA workaround */
3153         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3154                 rar_entries--;
3155
3156         /* return ENOMEM indicating insufficient memory for addresses */
3157         if (netdev_uc_count(netdev) > rar_entries)
3158                 return -ENOMEM;
3159
3160         if (!netdev_uc_empty(netdev) && rar_entries) {
3161                 struct netdev_hw_addr *ha;
3162
3163                 /*
3164                  * write the addresses in reverse order to avoid write
3165                  * combining
3166                  */
3167                 netdev_for_each_uc_addr(ha, netdev) {
3168                         if (!rar_entries)
3169                                 break;
3170                         e1000e_rar_set(hw, ha->addr, rar_entries--);
3171                         count++;
3172                 }
3173         }
3174
3175         /* zero out the remaining RAR entries not used above */
3176         for (; rar_entries > 0; rar_entries--) {
3177                 ew32(RAH(rar_entries), 0);
3178                 ew32(RAL(rar_entries), 0);
3179         }
3180         e1e_flush();
3181
3182         return count;
3183 }
3184
3185 /**
3186  * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3187  * @netdev: network interface device structure
3188  *
3189  * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3190  * address list or the network interface flags are updated.  This routine is
3191  * responsible for configuring the hardware for proper unicast, multicast,
3192  * promiscuous mode, and all-multi behavior.
3193  **/
3194 static void e1000e_set_rx_mode(struct net_device *netdev)
3195 {
3196         struct e1000_adapter *adapter = netdev_priv(netdev);
3197         struct e1000_hw *hw = &adapter->hw;
3198         u32 rctl;
3199
3200         /* Check for Promiscuous and All Multicast modes */
3201         rctl = er32(RCTL);
3202
3203         /* clear the affected bits */
3204         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3205
3206         if (netdev->flags & IFF_PROMISC) {
3207                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3208                 /* Do not hardware filter VLANs in promisc mode */
3209                 e1000e_vlan_filter_disable(adapter);
3210         } else {
3211                 int count;
3212                 if (netdev->flags & IFF_ALLMULTI) {
3213                         rctl |= E1000_RCTL_MPE;
3214                 } else {
3215                         /*
3216                          * Write addresses to the MTA, if the attempt fails
3217                          * then we should just turn on promiscuous mode so
3218                          * that we can at least receive multicast traffic
3219                          */
3220                         count = e1000e_write_mc_addr_list(netdev);
3221                         if (count < 0)
3222                                 rctl |= E1000_RCTL_MPE;
3223                 }
3224                 e1000e_vlan_filter_enable(adapter);
3225                 /*
3226                  * Write addresses to available RAR registers, if there is not
3227                  * sufficient space to store all the addresses then enable
3228                  * unicast promiscuous mode
3229                  */
3230                 count = e1000e_write_uc_addr_list(netdev);
3231                 if (count < 0)
3232                         rctl |= E1000_RCTL_UPE;
3233         }
3234
3235         ew32(RCTL, rctl);
3236
3237         if (netdev->features & NETIF_F_HW_VLAN_RX)
3238                 e1000e_vlan_strip_enable(adapter);
3239         else
3240                 e1000e_vlan_strip_disable(adapter);
3241 }
3242
3243 /**
3244  * e1000_configure - configure the hardware for Rx and Tx
3245  * @adapter: private board structure
3246  **/
3247 static void e1000_configure(struct e1000_adapter *adapter)
3248 {
3249         e1000e_set_rx_mode(adapter->netdev);
3250
3251         e1000_restore_vlan(adapter);
3252         e1000_init_manageability_pt(adapter);
3253
3254         e1000_configure_tx(adapter);
3255         e1000_setup_rctl(adapter);
3256         e1000_configure_rx(adapter);
3257         adapter->alloc_rx_buf(adapter, e1000_desc_unused(adapter->rx_ring),
3258                               GFP_KERNEL);
3259 }
3260
3261 /**
3262  * e1000e_power_up_phy - restore link in case the phy was powered down
3263  * @adapter: address of board private structure
3264  *
3265  * The phy may be powered down to save power and turn off link when the
3266  * driver is unloaded and wake on lan is not enabled (among others)
3267  * *** this routine MUST be followed by a call to e1000e_reset ***
3268  **/
3269 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3270 {
3271         if (adapter->hw.phy.ops.power_up)
3272                 adapter->hw.phy.ops.power_up(&adapter->hw);
3273
3274         adapter->hw.mac.ops.setup_link(&adapter->hw);
3275 }
3276
3277 /**
3278  * e1000_power_down_phy - Power down the PHY
3279  *
3280  * Power down the PHY so no link is implied when interface is down.
3281  * The PHY cannot be powered down if management or WoL is active.
3282  */
3283 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3284 {
3285         /* WoL is enabled */
3286         if (adapter->wol)
3287                 return;
3288
3289         if (adapter->hw.phy.ops.power_down)
3290                 adapter->hw.phy.ops.power_down(&adapter->hw);
3291 }
3292
3293 /**
3294  * e1000e_reset - bring the hardware into a known good state
3295  *
3296  * This function boots the hardware and enables some settings that
3297  * require a configuration cycle of the hardware - those cannot be
3298  * set/changed during runtime. After reset the device needs to be
3299  * properly configured for Rx, Tx etc.
3300  */
3301 void e1000e_reset(struct e1000_adapter *adapter)
3302 {
3303         struct e1000_mac_info *mac = &adapter->hw.mac;
3304         struct e1000_fc_info *fc = &adapter->hw.fc;
3305         struct e1000_hw *hw = &adapter->hw;
3306         u32 tx_space, min_tx_space, min_rx_space;
3307         u32 pba = adapter->pba;
3308         u16 hwm;
3309
3310         /* reset Packet Buffer Allocation to default */
3311         ew32(PBA, pba);
3312
3313         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3314                 /*
3315                  * To maintain wire speed transmits, the Tx FIFO should be
3316                  * large enough to accommodate two full transmit packets,
3317                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3318                  * the Rx FIFO should be large enough to accommodate at least
3319                  * one full receive packet and is similarly rounded up and
3320                  * expressed in KB.
3321                  */
3322                 pba = er32(PBA);
3323                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3324                 tx_space = pba >> 16;
3325                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3326                 pba &= 0xffff;
3327                 /*
3328                  * the Tx fifo also stores 16 bytes of information about the Tx
3329                  * but don't include ethernet FCS because hardware appends it
3330                  */
3331                 min_tx_space = (adapter->max_frame_size +
3332                                 sizeof(struct e1000_tx_desc) -
3333                                 ETH_FCS_LEN) * 2;
3334                 min_tx_space = ALIGN(min_tx_space, 1024);
3335                 min_tx_space >>= 10;
3336                 /* software strips receive CRC, so leave room for it */
3337                 min_rx_space = adapter->max_frame_size;
3338                 min_rx_space = ALIGN(min_rx_space, 1024);
3339                 min_rx_space >>= 10;
3340
3341                 /*
3342                  * If current Tx allocation is less than the min Tx FIFO size,
3343                  * and the min Tx FIFO size is less than the current Rx FIFO
3344                  * allocation, take space away from current Rx allocation
3345                  */
3346                 if ((tx_space < min_tx_space) &&
3347                     ((min_tx_space - tx_space) < pba)) {
3348                         pba -= min_tx_space - tx_space;
3349
3350                         /*
3351                          * if short on Rx space, Rx wins and must trump Tx
3352                          * adjustment or use Early Receive if available
3353                          */
3354                         if ((pba < min_rx_space) &&
3355                             (!(adapter->flags & FLAG_HAS_ERT)))
3356                                 /* ERT enabled in e1000_configure_rx */
3357                                 pba = min_rx_space;
3358                 }
3359
3360                 ew32(PBA, pba);
3361         }
3362
3363         /*
3364          * flow control settings
3365          *
3366          * The high water mark must be low enough to fit one full frame
3367          * (or the size used for early receive) above it in the Rx FIFO.
3368          * Set it to the lower of:
3369          * - 90% of the Rx FIFO size, and
3370          * - the full Rx FIFO size minus the early receive size (for parts
3371          *   with ERT support assuming ERT set to E1000_ERT_2048), or
3372          * - the full Rx FIFO size minus one full frame
3373          */
3374         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3375                 fc->pause_time = 0xFFFF;
3376         else
3377                 fc->pause_time = E1000_FC_PAUSE_TIME;
3378         fc->send_xon = 1;
3379         fc->current_mode = fc->requested_mode;
3380
3381         switch (hw->mac.type) {
3382         default:
3383                 if ((adapter->flags & FLAG_HAS_ERT) &&
3384                     (adapter->netdev->mtu > ETH_DATA_LEN))
3385                         hwm = min(((pba << 10) * 9 / 10),
3386                                   ((pba << 10) - (E1000_ERT_2048 << 3)));
3387                 else
3388                         hwm = min(((pba << 10) * 9 / 10),
3389                                   ((pba << 10) - adapter->max_frame_size));
3390
3391                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3392                 fc->low_water = fc->high_water - 8;
3393                 break;
3394         case e1000_pchlan:
3395                 /*
3396                  * Workaround PCH LOM adapter hangs with certain network
3397                  * loads.  If hangs persist, try disabling Tx flow control.
3398                  */
3399                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3400                         fc->high_water = 0x3500;
3401                         fc->low_water  = 0x1500;
3402                 } else {
3403                         fc->high_water = 0x5000;
3404                         fc->low_water  = 0x3000;
3405                 }
3406                 fc->refresh_time = 0x1000;
3407                 break;
3408         case e1000_pch2lan:
3409                 fc->high_water = 0x05C20;
3410                 fc->low_water = 0x05048;
3411                 fc->pause_time = 0x0650;
3412                 fc->refresh_time = 0x0400;
3413                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3414                         pba = 14;
3415                         ew32(PBA, pba);
3416                 }
3417                 break;
3418         }
3419
3420         /*
3421          * Disable Adaptive Interrupt Moderation if 2 full packets cannot
3422          * fit in receive buffer and early-receive not supported.
3423          */
3424         if (adapter->itr_setting & 0x3) {
3425                 if (((adapter->max_frame_size * 2) > (pba << 10)) &&
3426                     !(adapter->flags & FLAG_HAS_ERT)) {
3427                         if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3428                                 dev_info(&adapter->pdev->dev,
3429                                         "Interrupt Throttle Rate turned off\n");
3430                                 adapter->flags2 |= FLAG2_DISABLE_AIM;
3431                                 ew32(ITR, 0);
3432                         }
3433                 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3434                         dev_info(&adapter->pdev->dev,
3435                                  "Interrupt Throttle Rate turned on\n");
3436                         adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3437                         adapter->itr = 20000;
3438                         ew32(ITR, 1000000000 / (adapter->itr * 256));
3439                 }
3440         }
3441
3442         /* Allow time for pending master requests to run */
3443         mac->ops.reset_hw(hw);
3444
3445         /*
3446          * For parts with AMT enabled, let the firmware know
3447          * that the network interface is in control
3448          */
3449         if (adapter->flags & FLAG_HAS_AMT)
3450                 e1000e_get_hw_control(adapter);
3451
3452         ew32(WUC, 0);
3453
3454         if (mac->ops.init_hw(hw))
3455                 e_err("Hardware Error\n");
3456
3457         e1000_update_mng_vlan(adapter);
3458
3459         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3460         ew32(VET, ETH_P_8021Q);
3461
3462         e1000e_reset_adaptive(hw);
3463
3464         if (!netif_running(adapter->netdev) &&
3465             !test_bit(__E1000_TESTING, &adapter->state)) {
3466                 e1000_power_down_phy(adapter);
3467                 return;
3468         }
3469
3470         e1000_get_phy_info(hw);
3471
3472         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3473             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3474                 u16 phy_data = 0;
3475                 /*
3476                  * speed up time to link by disabling smart power down, ignore
3477                  * the return value of this function because there is nothing
3478                  * different we would do if it failed
3479                  */
3480                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3481                 phy_data &= ~IGP02E1000_PM_SPD;
3482                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3483         }
3484 }
3485
3486 int e1000e_up(struct e1000_adapter *adapter)
3487 {
3488         struct e1000_hw *hw = &adapter->hw;
3489
3490         /* hardware has been reset, we need to reload some things */
3491         e1000_configure(adapter);
3492
3493         clear_bit(__E1000_DOWN, &adapter->state);
3494
3495         napi_enable(&adapter->napi);
3496         if (adapter->msix_entries)
3497                 e1000_configure_msix(adapter);
3498         e1000_irq_enable(adapter);
3499
3500         netif_start_queue(adapter->netdev);
3501
3502         /* fire a link change interrupt to start the watchdog */
3503         if (adapter->msix_entries)
3504                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3505         else
3506                 ew32(ICS, E1000_ICS_LSC);
3507
3508         return 0;
3509 }
3510
3511 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3512 {
3513         struct e1000_hw *hw = &adapter->hw;
3514
3515         if (!(adapter->flags2 & FLAG2_DMA_BURST))
3516                 return;
3517
3518         /* flush pending descriptor writebacks to memory */
3519         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3520         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3521
3522         /* execute the writes immediately */
3523         e1e_flush();
3524 }
3525
3526 static void e1000e_update_stats(struct e1000_adapter *adapter);
3527
3528 void e1000e_down(struct e1000_adapter *adapter)
3529 {
3530         struct net_device *netdev = adapter->netdev;
3531         struct e1000_hw *hw = &adapter->hw;
3532         u32 tctl, rctl;
3533
3534         /*
3535          * signal that we're down so the interrupt handler does not
3536          * reschedule our watchdog timer
3537          */
3538         set_bit(__E1000_DOWN, &adapter->state);
3539
3540         /* disable receives in the hardware */
3541         rctl = er32(RCTL);
3542         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3543                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3544         /* flush and sleep below */
3545
3546         netif_stop_queue(netdev);
3547
3548         /* disable transmits in the hardware */
3549         tctl = er32(TCTL);
3550         tctl &= ~E1000_TCTL_EN;
3551         ew32(TCTL, tctl);
3552
3553         /* flush both disables and wait for them to finish */
3554         e1e_flush();
3555         usleep_range(10000, 20000);
3556
3557         napi_disable(&adapter->napi);
3558         e1000_irq_disable(adapter);
3559
3560         del_timer_sync(&adapter->watchdog_timer);
3561         del_timer_sync(&adapter->phy_info_timer);
3562
3563         netif_carrier_off(netdev);
3564
3565         spin_lock(&adapter->stats64_lock);
3566         e1000e_update_stats(adapter);
3567         spin_unlock(&adapter->stats64_lock);
3568
3569         e1000e_flush_descriptors(adapter);
3570         e1000_clean_tx_ring(adapter);
3571         e1000_clean_rx_ring(adapter);
3572
3573         adapter->link_speed = 0;
3574         adapter->link_duplex = 0;
3575
3576         if (!pci_channel_offline(adapter->pdev))
3577                 e1000e_reset(adapter);
3578
3579         /*
3580          * TODO: for power management, we could drop the link and
3581          * pci_disable_device here.
3582          */
3583 }
3584
3585 void e1000e_reinit_locked(struct e1000_adapter *adapter)
3586 {
3587         might_sleep();
3588         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3589                 usleep_range(1000, 2000);
3590         e1000e_down(adapter);
3591         e1000e_up(adapter);
3592         clear_bit(__E1000_RESETTING, &adapter->state);
3593 }
3594
3595 /**
3596  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
3597  * @adapter: board private structure to initialize
3598  *
3599  * e1000_sw_init initializes the Adapter private data structure.
3600  * Fields are initialized based on PCI device information and
3601  * OS network device settings (MTU size).
3602  **/
3603 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
3604 {
3605         struct net_device *netdev = adapter->netdev;
3606
3607         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
3608         adapter->rx_ps_bsize0 = 128;
3609         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3610         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
3611
3612         spin_lock_init(&adapter->stats64_lock);
3613
3614         e1000e_set_interrupt_capability(adapter);
3615
3616         if (e1000_alloc_queues(adapter))
3617                 return -ENOMEM;
3618
3619         /* Explicitly disable IRQ since the NIC can be in any state. */
3620         e1000_irq_disable(adapter);
3621
3622         set_bit(__E1000_DOWN, &adapter->state);
3623         return 0;
3624 }
3625
3626 /**
3627  * e1000_intr_msi_test - Interrupt Handler
3628  * @irq: interrupt number
3629  * @data: pointer to a network interface device structure
3630  **/
3631 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
3632 {
3633         struct net_device *netdev = data;
3634         struct e1000_adapter *adapter = netdev_priv(netdev);
3635         struct e1000_hw *hw = &adapter->hw;
3636         u32 icr = er32(ICR);
3637
3638         e_dbg("icr is %08X\n", icr);
3639         if (icr & E1000_ICR_RXSEQ) {
3640                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
3641                 wmb();
3642         }
3643
3644         return IRQ_HANDLED;
3645 }
3646
3647 /**
3648  * e1000_test_msi_interrupt - Returns 0 for successful test
3649  * @adapter: board private struct
3650  *
3651  * code flow taken from tg3.c
3652  **/
3653 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
3654 {
3655         struct net_device *netdev = adapter->netdev;
3656         struct e1000_hw *hw = &adapter->hw;
3657         int err;
3658
3659         /* poll_enable hasn't been called yet, so don't need disable */
3660         /* clear any pending events */
3661         er32(ICR);
3662
3663         /* free the real vector and request a test handler */
3664         e1000_free_irq(adapter);
3665         e1000e_reset_interrupt_capability(adapter);
3666
3667         /* Assume that the test fails, if it succeeds then the test
3668          * MSI irq handler will unset this flag */
3669         adapter->flags |= FLAG_MSI_TEST_FAILED;
3670
3671         err = pci_enable_msi(adapter->pdev);
3672         if (err)
3673                 goto msi_test_failed;
3674
3675         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
3676                           netdev->name, netdev);
3677         if (err) {
3678                 pci_disable_msi(adapter->pdev);
3679                 goto msi_test_failed;
3680         }
3681
3682         wmb();
3683
3684         e1000_irq_enable(adapter);
3685
3686         /* fire an unusual interrupt on the test handler */
3687         ew32(ICS, E1000_ICS_RXSEQ);
3688         e1e_flush();
3689         msleep(50);
3690
3691         e1000_irq_disable(adapter);
3692
3693         rmb();
3694
3695         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3696                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3697                 e_info("MSI interrupt test failed, using legacy interrupt.\n");
3698         } else
3699                 e_dbg("MSI interrupt test succeeded!\n");
3700
3701         free_irq(adapter->pdev->irq, netdev);
3702         pci_disable_msi(adapter->pdev);
3703
3704 msi_test_failed:
3705         e1000e_set_interrupt_capability(adapter);
3706         return e1000_request_irq(adapter);
3707 }
3708
3709 /**
3710  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3711  * @adapter: board private struct
3712  *
3713  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3714  **/
3715 static int e1000_test_msi(struct e1000_adapter *adapter)
3716 {
3717         int err;
3718         u16 pci_cmd;
3719
3720         if (!(adapter->flags & FLAG_MSI_ENABLED))
3721                 return 0;
3722
3723         /* disable SERR in case the MSI write causes a master abort */
3724         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3725         if (pci_cmd & PCI_COMMAND_SERR)
3726                 pci_write_config_word(adapter->pdev, PCI_COMMAND,
3727                                       pci_cmd & ~PCI_COMMAND_SERR);
3728
3729         err = e1000_test_msi_interrupt(adapter);
3730
3731         /* re-enable SERR */
3732         if (pci_cmd & PCI_COMMAND_SERR) {
3733                 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3734                 pci_cmd |= PCI_COMMAND_SERR;
3735                 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3736         }
3737
3738         return err;
3739 }
3740
3741 /**
3742  * e1000_open - Called when a network interface is made active
3743  * @netdev: network interface device structure
3744  *
3745  * Returns 0 on success, negative value on failure
3746  *
3747  * The open entry point is called when a network interface is made
3748  * active by the system (IFF_UP).  At this point all resources needed
3749  * for transmit and receive operations are allocated, the interrupt
3750  * handler is registered with the OS, the watchdog timer is started,
3751  * and the stack is notified that the interface is ready.
3752  **/
3753 static int e1000_open(struct net_device *netdev)
3754 {
3755         struct e1000_adapter *adapter = netdev_priv(netdev);
3756         struct e1000_hw *hw = &adapter->hw;
3757         struct pci_dev *pdev = adapter->pdev;
3758         int err;
3759
3760         /* disallow open during test */
3761         if (test_bit(__E1000_TESTING, &adapter->state))
3762                 return -EBUSY;
3763
3764         pm_runtime_get_sync(&pdev->dev);
3765
3766         netif_carrier_off(netdev);
3767
3768         /* allocate transmit descriptors */
3769         err = e1000e_setup_tx_resources(adapter);
3770         if (err)
3771                 goto err_setup_tx;
3772
3773         /* allocate receive descriptors */
3774         err = e1000e_setup_rx_resources(adapter);
3775         if (err)
3776                 goto err_setup_rx;
3777
3778         /*
3779          * If AMT is enabled, let the firmware know that the network
3780          * interface is now open and reset the part to a known state.
3781          */
3782         if (adapter->flags & FLAG_HAS_AMT) {
3783                 e1000e_get_hw_control(adapter);
3784                 e1000e_reset(adapter);
3785         }
3786
3787         e1000e_power_up_phy(adapter);
3788
3789         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3790         if ((adapter->hw.mng_cookie.status &
3791              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3792                 e1000_update_mng_vlan(adapter);
3793
3794         /* DMA latency requirement to workaround early-receive/jumbo issue */
3795         if ((adapter->flags & FLAG_HAS_ERT) ||
3796             (adapter->hw.mac.type == e1000_pch2lan))
3797                 pm_qos_add_request(&adapter->netdev->pm_qos_req,
3798                                    PM_QOS_CPU_DMA_LATENCY,
3799                                    PM_QOS_DEFAULT_VALUE);
3800
3801         /*
3802          * before we allocate an interrupt, we must be ready to handle it.
3803          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3804          * as soon as we call pci_request_irq, so we have to setup our
3805          * clean_rx handler before we do so.
3806          */
3807         e1000_configure(adapter);
3808
3809         err = e1000_request_irq(adapter);
3810         if (err)
3811                 goto err_req_irq;
3812
3813         /*
3814          * Work around PCIe errata with MSI interrupts causing some chipsets to
3815          * ignore e1000e MSI messages, which means we need to test our MSI
3816          * interrupt now
3817          */
3818         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3819                 err = e1000_test_msi(adapter);
3820                 if (err) {
3821                         e_err("Interrupt allocation failed\n");
3822                         goto err_req_irq;
3823                 }
3824         }
3825
3826         /* From here on the code is the same as e1000e_up() */
3827         clear_bit(__E1000_DOWN, &adapter->state);
3828
3829         napi_enable(&adapter->napi);
3830
3831         e1000_irq_enable(adapter);
3832
3833         netif_start_queue(netdev);
3834
3835         adapter->idle_check = true;
3836         pm_runtime_put(&pdev->dev);
3837
3838         /* fire a link status change interrupt to start the watchdog */
3839         if (adapter->msix_entries)
3840                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3841         else
3842                 ew32(ICS, E1000_ICS_LSC);
3843
3844         return 0;
3845
3846 err_req_irq:
3847         e1000e_release_hw_control(adapter);
3848         e1000_power_down_phy(adapter);
3849         e1000e_free_rx_resources(adapter);
3850 err_setup_rx:
3851         e1000e_free_tx_resources(adapter);
3852 err_setup_tx:
3853         e1000e_reset(adapter);
3854         pm_runtime_put_sync(&pdev->dev);
3855
3856         return err;
3857 }
3858
3859 /**
3860  * e1000_close - Disables a network interface
3861  * @netdev: network interface device structure
3862  *
3863  * Returns 0, this is not allowed to fail
3864  *
3865  * The close entry point is called when an interface is de-activated
3866  * by the OS.  The hardware is still under the drivers control, but
3867  * needs to be disabled.  A global MAC reset is issued to stop the
3868  * hardware, and all transmit and receive resources are freed.
3869  **/
3870 static int e1000_close(struct net_device *netdev)
3871 {
3872         struct e1000_adapter *adapter = netdev_priv(netdev);
3873         struct pci_dev *pdev = adapter->pdev;
3874
3875         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3876
3877         pm_runtime_get_sync(&pdev->dev);
3878
3879         if (!test_bit(__E1000_DOWN, &adapter->state)) {
3880                 e1000e_down(adapter);
3881                 e1000_free_irq(adapter);
3882         }
3883         e1000_power_down_phy(adapter);
3884
3885         e1000e_free_tx_resources(adapter);
3886         e1000e_free_rx_resources(adapter);
3887
3888         /*
3889          * kill manageability vlan ID if supported, but not if a vlan with
3890          * the same ID is registered on the host OS (let 8021q kill it)
3891          */
3892         if (adapter->hw.mng_cookie.status &
3893             E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
3894                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3895
3896         /*
3897          * If AMT is enabled, let the firmware know that the network
3898          * interface is now closed
3899          */
3900         if ((adapter->flags & FLAG_HAS_AMT) &&
3901             !test_bit(__E1000_TESTING, &adapter->state))
3902                 e1000e_release_hw_control(adapter);
3903
3904         if ((adapter->flags & FLAG_HAS_ERT) ||
3905             (adapter->hw.mac.type == e1000_pch2lan))
3906                 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
3907
3908         pm_runtime_put_sync(&pdev->dev);
3909
3910         return 0;
3911 }
3912 /**
3913  * e1000_set_mac - Change the Ethernet Address of the NIC
3914  * @netdev: network interface device structure
3915  * @p: pointer to an address structure
3916  *
3917  * Returns 0 on success, negative on failure
3918  **/
3919 static int e1000_set_mac(struct net_device *netdev, void *p)
3920 {
3921         struct e1000_adapter *adapter = netdev_priv(netdev);
3922         struct sockaddr *addr = p;
3923
3924         if (!is_valid_ether_addr(addr->sa_data))
3925                 return -EADDRNOTAVAIL;
3926
3927         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3928         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3929
3930         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
3931
3932         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
3933                 /* activate the work around */
3934                 e1000e_set_laa_state_82571(&adapter->hw, 1);
3935
3936                 /*
3937                  * Hold a copy of the LAA in RAR[14] This is done so that
3938                  * between the time RAR[0] gets clobbered  and the time it
3939                  * gets fixed (in e1000_watchdog), the actual LAA is in one
3940                  * of the RARs and no incoming packets directed to this port
3941                  * are dropped. Eventually the LAA will be in RAR[0] and
3942                  * RAR[14]
3943                  */
3944                 e1000e_rar_set(&adapter->hw,
3945                               adapter->hw.mac.addr,
3946                               adapter->hw.mac.rar_entry_count - 1);
3947         }
3948
3949         return 0;
3950 }
3951
3952 /**
3953  * e1000e_update_phy_task - work thread to update phy
3954  * @work: pointer to our work struct
3955  *
3956  * this worker thread exists because we must acquire a
3957  * semaphore to read the phy, which we could msleep while
3958  * waiting for it, and we can't msleep in a timer.
3959  **/
3960 static void e1000e_update_phy_task(struct work_struct *work)
3961 {
3962         struct e1000_adapter *adapter = container_of(work,
3963                                         struct e1000_adapter, update_phy_task);
3964
3965         if (test_bit(__E1000_DOWN, &adapter->state))
3966                 return;
3967
3968         e1000_get_phy_info(&adapter->hw);
3969 }
3970
3971 /*
3972  * Need to wait a few seconds after link up to get diagnostic information from
3973  * the phy
3974  */
3975 static void e1000_update_phy_info(unsigned long data)
3976 {
3977         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
3978
3979         if (test_bit(__E1000_DOWN, &adapter->state))
3980                 return;
3981
3982         schedule_work(&adapter->update_phy_task);
3983 }
3984
3985 /**
3986  * e1000e_update_phy_stats - Update the PHY statistics counters
3987  * @adapter: board private structure
3988  *
3989  * Read/clear the upper 16-bit PHY registers and read/accumulate lower
3990  **/
3991 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
3992 {
3993         struct e1000_hw *hw = &adapter->hw;
3994         s32 ret_val;
3995         u16 phy_data;
3996
3997         ret_val = hw->phy.ops.acquire(hw);
3998         if (ret_val)
3999                 return;
4000
4001         /*
4002          * A page set is expensive so check if already on desired page.
4003          * If not, set to the page with the PHY status registers.
4004          */
4005         hw->phy.addr = 1;
4006         ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4007                                            &phy_data);
4008         if (ret_val)
4009                 goto release;
4010         if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4011                 ret_val = hw->phy.ops.set_page(hw,
4012                                                HV_STATS_PAGE << IGP_PAGE_SHIFT);
4013                 if (ret_val)
4014                         goto release;
4015         }
4016
4017         /* Single Collision Count */
4018         hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4019         ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4020         if (!ret_val)
4021                 adapter->stats.scc += phy_data;
4022
4023         /* Excessive Collision Count */
4024         hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4025         ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4026         if (!ret_val)
4027                 adapter->stats.ecol += phy_data;
4028
4029         /* Multiple Collision Count */
4030         hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4031         ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4032         if (!ret_val)
4033                 adapter->stats.mcc += phy_data;
4034
4035         /* Late Collision Count */
4036         hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4037         ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4038         if (!ret_val)
4039                 adapter->stats.latecol += phy_data;
4040
4041         /* Collision Count - also used for adaptive IFS */
4042         hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4043         ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4044         if (!ret_val)
4045                 hw->mac.collision_delta = phy_data;
4046
4047         /* Defer Count */
4048         hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4049         ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4050         if (!ret_val)
4051                 adapter->stats.dc += phy_data;
4052
4053         /* Transmit with no CRS */
4054         hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4055         ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4056         if (!ret_val)
4057                 adapter->stats.tncrs += phy_data;
4058
4059 release:
4060         hw->phy.ops.release(hw);
4061 }
4062
4063 /**
4064  * e1000e_update_stats - Update the board statistics counters
4065  * @adapter: board private structure
4066  **/
4067 static void e1000e_update_stats(struct e1000_adapter *adapter)
4068 {
4069         struct net_device *netdev = adapter->netdev;
4070         struct e1000_hw *hw = &adapter->hw;
4071         struct pci_dev *pdev = adapter->pdev;
4072
4073         /*
4074          * Prevent stats update while adapter is being reset, or if the pci
4075          * connection is down.
4076          */
4077         if (adapter->link_speed == 0)
4078                 return;
4079         if (pci_channel_offline(pdev))
4080                 return;
4081
4082         adapter->stats.crcerrs += er32(CRCERRS);
4083         adapter->stats.gprc += er32(GPRC);
4084         adapter->stats.gorc += er32(GORCL);
4085         er32(GORCH); /* Clear gorc */
4086         adapter->stats.bprc += er32(BPRC);
4087         adapter->stats.mprc += er32(MPRC);
4088         adapter->stats.roc += er32(ROC);
4089
4090         adapter->stats.mpc += er32(MPC);
4091
4092         /* Half-duplex statistics */
4093         if (adapter->link_duplex == HALF_DUPLEX) {
4094                 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4095                         e1000e_update_phy_stats(adapter);
4096                 } else {
4097                         adapter->stats.scc += er32(SCC);
4098                         adapter->stats.ecol += er32(ECOL);
4099                         adapter->stats.mcc += er32(MCC);
4100                         adapter->stats.latecol += er32(LATECOL);
4101                         adapter->stats.dc += er32(DC);
4102
4103                         hw->mac.collision_delta = er32(COLC);
4104
4105                         if ((hw->mac.type != e1000_82574) &&
4106                             (hw->mac.type != e1000_82583))
4107                                 adapter->stats.tncrs += er32(TNCRS);
4108                 }
4109                 adapter->stats.colc += hw->mac.collision_delta;
4110         }
4111
4112         adapter->stats.xonrxc += er32(XONRXC);
4113         adapter->stats.xontxc += er32(XONTXC);
4114         adapter->stats.xoffrxc += er32(XOFFRXC);
4115         adapter->stats.xofftxc += er32(XOFFTXC);
4116         adapter->stats.gptc += er32(GPTC);
4117         adapter->stats.gotc += er32(GOTCL);
4118         er32(GOTCH); /* Clear gotc */
4119         adapter->stats.rnbc += er32(RNBC);
4120         adapter->stats.ruc += er32(RUC);
4121
4122         adapter->stats.mptc += er32(MPTC);
4123         adapter->stats.bptc += er32(BPTC);
4124
4125         /* used for adaptive IFS */
4126
4127         hw->mac.tx_packet_delta = er32(TPT);
4128         adapter->stats.tpt += hw->mac.tx_packet_delta;
4129
4130         adapter->stats.algnerrc += er32(ALGNERRC);
4131         adapter->stats.rxerrc += er32(RXERRC);
4132         adapter->stats.cexterr += er32(CEXTERR);
4133         adapter->stats.tsctc += er32(TSCTC);
4134         adapter->stats.tsctfc += er32(TSCTFC);
4135
4136         /* Fill out the OS statistics structure */
4137         netdev->stats.multicast = adapter->stats.mprc;
4138         netdev->stats.collisions = adapter->stats.colc;
4139
4140         /* Rx Errors */
4141
4142         /*
4143          * RLEC on some newer hardware can be incorrect so build
4144          * our own version based on RUC and ROC
4145          */
4146         netdev->stats.rx_errors = adapter->stats.rxerrc +
4147                 adapter->stats.crcerrs + adapter->stats.algnerrc +
4148                 adapter->stats.ruc + adapter->stats.roc +
4149                 adapter->stats.cexterr;
4150         netdev->stats.rx_length_errors = adapter->stats.ruc +
4151                                               adapter->stats.roc;
4152         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4153         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4154         netdev->stats.rx_missed_errors = adapter->stats.mpc;
4155
4156         /* Tx Errors */
4157         netdev->stats.tx_errors = adapter->stats.ecol +
4158                                        adapter->stats.latecol;
4159         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4160         netdev->stats.tx_window_errors = adapter->stats.latecol;
4161         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4162
4163         /* Tx Dropped needs to be maintained elsewhere */
4164
4165         /* Management Stats */
4166         adapter->stats.mgptc += er32(MGTPTC);
4167         adapter->stats.mgprc += er32(MGTPRC);
4168         adapter->stats.mgpdc += er32(MGTPDC);
4169 }
4170
4171 /**
4172  * e1000_phy_read_status - Update the PHY register status snapshot
4173  * @adapter: board private structure
4174  **/
4175 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4176 {
4177         struct e1000_hw *hw = &adapter->hw;
4178         struct e1000_phy_regs *phy = &adapter->phy_regs;
4179
4180         if ((er32(STATUS) & E1000_STATUS_LU) &&
4181             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4182                 int ret_val;
4183
4184                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
4185                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
4186                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
4187                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
4188                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
4189                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
4190                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
4191                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
4192                 if (ret_val)
4193                         e_warn("Error reading PHY register\n");
4194         } else {
4195                 /*
4196                  * Do not read PHY registers if link is not up
4197                  * Set values to typical power-on defaults
4198                  */
4199                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4200                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4201                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4202                              BMSR_ERCAP);
4203                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4204                                   ADVERTISE_ALL | ADVERTISE_CSMA);
4205                 phy->lpa = 0;
4206                 phy->expansion = EXPANSION_ENABLENPAGE;
4207                 phy->ctrl1000 = ADVERTISE_1000FULL;
4208                 phy->stat1000 = 0;
4209                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4210         }
4211 }
4212
4213 static void e1000_print_link_info(struct e1000_adapter *adapter)
4214 {
4215         struct e1000_hw *hw = &adapter->hw;
4216         u32 ctrl = er32(CTRL);
4217
4218         /* Link status message must follow this format for user tools */
4219         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4220                 adapter->netdev->name,
4221                 adapter->link_speed,
4222                 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4223                 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4224                 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4225                 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4226 }
4227
4228 static bool e1000e_has_link(struct e1000_adapter *adapter)
4229 {
4230         struct e1000_hw *hw = &adapter->hw;
4231         bool link_active = 0;
4232         s32 ret_val = 0;
4233
4234         /*
4235          * get_link_status is set on LSC (link status) interrupt or
4236          * Rx sequence error interrupt.  get_link_status will stay
4237          * false until the check_for_link establishes link
4238          * for copper adapters ONLY
4239          */
4240         switch (hw->phy.media_type) {
4241         case e1000_media_type_copper:
4242                 if (hw->mac.get_link_status) {
4243                         ret_val = hw->mac.ops.check_for_link(hw);
4244                         link_active = !hw->mac.get_link_status;
4245                 } else {
4246                         link_active = 1;
4247                 }
4248                 break;
4249         case e1000_media_type_fiber:
4250                 ret_val = hw->mac.ops.check_for_link(hw);
4251                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4252                 break;
4253         case e1000_media_type_internal_serdes:
4254                 ret_val = hw->mac.ops.check_for_link(hw);
4255                 link_active = adapter->hw.mac.serdes_has_link;
4256                 break;
4257         default:
4258         case e1000_media_type_unknown:
4259                 break;
4260         }
4261
4262         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4263             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4264                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4265                 e_info("Gigabit has been disabled, downgrading speed\n");
4266         }
4267
4268         return link_active;
4269 }
4270
4271 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4272 {
4273         /* make sure the receive unit is started */
4274         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4275             (adapter->flags & FLAG_RX_RESTART_NOW)) {
4276                 struct e1000_hw *hw = &adapter->hw;
4277                 u32 rctl = er32(RCTL);
4278                 ew32(RCTL, rctl | E1000_RCTL_EN);
4279                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
4280         }
4281 }
4282
4283 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4284 {
4285         struct e1000_hw *hw = &adapter->hw;
4286
4287         /*
4288          * With 82574 controllers, PHY needs to be checked periodically
4289          * for hung state and reset, if two calls return true
4290          */
4291         if (e1000_check_phy_82574(hw))
4292                 adapter->phy_hang_count++;
4293         else
4294                 adapter->phy_hang_count = 0;
4295
4296         if (adapter->phy_hang_count > 1) {
4297                 adapter->phy_hang_count = 0;
4298                 schedule_work(&adapter->reset_task);
4299         }
4300 }
4301
4302 /**
4303  * e1000_watchdog - Timer Call-back
4304  * @data: pointer to adapter cast into an unsigned long
4305  **/
4306 static void e1000_watchdog(unsigned long data)
4307 {
4308         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4309
4310         /* Do the rest outside of interrupt context */
4311         schedule_work(&adapter->watchdog_task);
4312
4313         /* TODO: make this use queue_delayed_work() */
4314 }
4315
4316 static void e1000_watchdog_task(struct work_struct *work)
4317 {
4318         struct e1000_adapter *adapter = container_of(work,
4319                                         struct e1000_adapter, watchdog_task);
4320         struct net_device *netdev = adapter->netdev;
4321         struct e1000_mac_info *mac = &adapter->hw.mac;
4322         struct e1000_phy_info *phy = &adapter->hw.phy;
4323         struct e1000_ring *tx_ring = adapter->tx_ring;
4324         struct e1000_hw *hw = &adapter->hw;
4325         u32 link, tctl;
4326
4327         if (test_bit(__E1000_DOWN, &adapter->state))
4328                 return;
4329
4330         link = e1000e_has_link(adapter);
4331         if ((netif_carrier_ok(netdev)) && link) {
4332                 /* Cancel scheduled suspend requests. */
4333                 pm_runtime_resume(netdev->dev.parent);
4334
4335                 e1000e_enable_receives(adapter);
4336                 goto link_up;
4337         }
4338
4339         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4340             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4341                 e1000_update_mng_vlan(adapter);
4342
4343         if (link) {
4344                 if (!netif_carrier_ok(netdev)) {
4345                         bool txb2b = 1;
4346
4347                         /* Cancel scheduled suspend requests. */
4348                         pm_runtime_resume(netdev->dev.parent);
4349
4350                         /* update snapshot of PHY registers on LSC */
4351                         e1000_phy_read_status(adapter);
4352                         mac->ops.get_link_up_info(&adapter->hw,
4353                                                    &adapter->link_speed,
4354                                                    &adapter->link_duplex);
4355                         e1000_print_link_info(adapter);
4356                         /*
4357                          * On supported PHYs, check for duplex mismatch only
4358                          * if link has autonegotiated at 10/100 half
4359                          */
4360                         if ((hw->phy.type == e1000_phy_igp_3 ||
4361                              hw->phy.type == e1000_phy_bm) &&
4362                             (hw->mac.autoneg == true) &&
4363                             (adapter->link_speed == SPEED_10 ||
4364                              adapter->link_speed == SPEED_100) &&
4365                             (adapter->link_duplex == HALF_DUPLEX)) {
4366                                 u16 autoneg_exp;
4367
4368                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
4369
4370                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
4371                                         e_info("Autonegotiated half duplex but link partner cannot autoneg.  Try forcing full duplex if link gets many collisions.\n");
4372                         }
4373
4374                         /* adjust timeout factor according to speed/duplex */
4375                         adapter->tx_timeout_factor = 1;
4376                         switch (adapter->link_speed) {
4377                         case SPEED_10:
4378                                 txb2b = 0;
4379                                 adapter->tx_timeout_factor = 16;
4380                                 break;
4381                         case SPEED_100:
4382                                 txb2b = 0;
4383                                 adapter->tx_timeout_factor = 10;
4384                                 break;
4385                         }
4386
4387                         /*
4388                          * workaround: re-program speed mode bit after
4389                          * link-up event
4390                          */
4391                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4392                             !txb2b) {
4393                                 u32 tarc0;
4394                                 tarc0 = er32(TARC(0));
4395                                 tarc0 &= ~SPEED_MODE_BIT;
4396                                 ew32(TARC(0), tarc0);
4397                         }
4398
4399                         /*
4400                          * disable TSO for pcie and 10/100 speeds, to avoid
4401                          * some hardware issues
4402                          */
4403                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4404                                 switch (adapter->link_speed) {
4405                                 case SPEED_10:
4406                                 case SPEED_100:
4407                                         e_info("10/100 speed: disabling TSO\n");
4408                                         netdev->features &= ~NETIF_F_TSO;
4409                                         netdev->features &= ~NETIF_F_TSO6;
4410                                         break;
4411                                 case SPEED_1000:
4412                                         netdev->features |= NETIF_F_TSO;
4413                                         netdev->features |= NETIF_F_TSO6;
4414                                         break;
4415                                 default:
4416                                         /* oops */
4417                                         break;
4418                                 }
4419                         }
4420
4421                         /*
4422                          * enable transmits in the hardware, need to do this
4423                          * after setting TARC(0)
4424                          */
4425                         tctl = er32(TCTL);
4426                         tctl |= E1000_TCTL_EN;
4427                         ew32(TCTL, tctl);
4428
4429                         /*
4430                          * Perform any post-link-up configuration before
4431                          * reporting link up.
4432                          */
4433                         if (phy->ops.cfg_on_link_up)
4434                                 phy->ops.cfg_on_link_up(hw);
4435
4436                         netif_carrier_on(netdev);
4437
4438                         if (!test_bit(__E1000_DOWN, &adapter->state))
4439                                 mod_timer(&adapter->phy_info_timer,
4440                                           round_jiffies(jiffies + 2 * HZ));
4441                 }
4442         } else {
4443                 if (netif_carrier_ok(netdev)) {
4444                         adapter->link_speed = 0;
4445                         adapter->link_duplex = 0;
4446                         /* Link status message must follow this format */
4447                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
4448                                adapter->netdev->name);
4449                         netif_carrier_off(netdev);
4450                         if (!test_bit(__E1000_DOWN, &adapter->state))
4451                                 mod_timer(&adapter->phy_info_timer,
4452                                           round_jiffies(jiffies + 2 * HZ));
4453
4454                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
4455                                 schedule_work(&adapter->reset_task);
4456                         else
4457                                 pm_schedule_suspend(netdev->dev.parent,
4458                                                         LINK_TIMEOUT);
4459                 }
4460         }
4461
4462 link_up:
4463         spin_lock(&adapter->stats64_lock);
4464         e1000e_update_stats(adapter);
4465
4466         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4467         adapter->tpt_old = adapter->stats.tpt;
4468         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4469         adapter->colc_old = adapter->stats.colc;
4470
4471         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4472         adapter->gorc_old = adapter->stats.gorc;
4473         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4474         adapter->gotc_old = adapter->stats.gotc;
4475         spin_unlock(&adapter->stats64_lock);
4476
4477         e1000e_update_adaptive(&adapter->hw);
4478
4479         if (!netif_carrier_ok(netdev) &&
4480             (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) {
4481                 /*
4482                  * We've lost link, so the controller stops DMA,
4483                  * but we've got queued Tx work that's never going
4484                  * to get done, so reset controller to flush Tx.
4485                  * (Do the reset outside of interrupt context).
4486                  */
4487                 schedule_work(&adapter->reset_task);
4488                 /* return immediately since reset is imminent */
4489                 return;
4490         }
4491
4492         /* Simple mode for Interrupt Throttle Rate (ITR) */
4493         if (adapter->itr_setting == 4) {
4494                 /*
4495                  * Symmetric Tx/Rx gets a reduced ITR=2000;
4496                  * Total asymmetrical Tx or Rx gets ITR=8000;
4497                  * everyone else is between 2000-8000.
4498                  */
4499                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4500                 u32 dif = (adapter->gotc > adapter->gorc ?
4501                             adapter->gotc - adapter->gorc :
4502                             adapter->gorc - adapter->gotc) / 10000;
4503                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4504
4505                 ew32(ITR, 1000000000 / (itr * 256));
4506         }
4507
4508         /* Cause software interrupt to ensure Rx ring is cleaned */
4509         if (adapter->msix_entries)
4510                 ew32(ICS, adapter->rx_ring->ims_val);
4511         else
4512                 ew32(ICS, E1000_ICS_RXDMT0);
4513
4514         /* flush pending descriptors to memory before detecting Tx hang */
4515         e1000e_flush_descriptors(adapter);
4516
4517         /* Force detection of hung controller every watchdog period */
4518         adapter->detect_tx_hung = 1;
4519
4520         /*
4521          * With 82571 controllers, LAA may be overwritten due to controller
4522          * reset from the other port. Set the appropriate LAA in RAR[0]
4523          */
4524         if (e1000e_get_laa_state_82571(hw))
4525                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
4526
4527         if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
4528                 e1000e_check_82574_phy_workaround(adapter);
4529
4530         /* Reset the timer */
4531         if (!test_bit(__E1000_DOWN, &adapter->state))
4532                 mod_timer(&adapter->watchdog_timer,
4533                           round_jiffies(jiffies + 2 * HZ));
4534 }
4535
4536 #define E1000_TX_FLAGS_CSUM             0x00000001
4537 #define E1000_TX_FLAGS_VLAN             0x00000002
4538 #define E1000_TX_FLAGS_TSO              0x00000004
4539 #define E1000_TX_FLAGS_IPV4             0x00000008
4540 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
4541 #define E1000_TX_FLAGS_VLAN_SHIFT       16
4542
4543 static int e1000_tso(struct e1000_adapter *adapter,
4544                      struct sk_buff *skb)
4545 {
4546         struct e1000_ring *tx_ring = adapter->tx_ring;
4547         struct e1000_context_desc *context_desc;
4548         struct e1000_buffer *buffer_info;
4549         unsigned int i;
4550         u32 cmd_length = 0;
4551         u16 ipcse = 0, tucse, mss;
4552         u8 ipcss, ipcso, tucss, tucso, hdr_len;
4553
4554         if (!skb_is_gso(skb))
4555                 return 0;
4556
4557         if (skb_header_cloned(skb)) {
4558                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4559
4560                 if (err)
4561                         return err;
4562         }
4563
4564         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4565         mss = skb_shinfo(skb)->gso_size;
4566         if (skb->protocol == htons(ETH_P_IP)) {
4567                 struct iphdr *iph = ip_hdr(skb);
4568                 iph->tot_len = 0;
4569                 iph->check = 0;
4570                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
4571                                                          0, IPPROTO_TCP, 0);
4572                 cmd_length = E1000_TXD_CMD_IP;
4573                 ipcse = skb_transport_offset(skb) - 1;
4574         } else if (skb_is_gso_v6(skb)) {
4575                 ipv6_hdr(skb)->payload_len = 0;
4576                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4577                                                        &ipv6_hdr(skb)->daddr,
4578                                                        0, IPPROTO_TCP, 0);
4579                 ipcse = 0;
4580         }
4581         ipcss = skb_network_offset(skb);
4582         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
4583         tucss = skb_transport_offset(skb);
4584         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
4585         tucse = 0;
4586
4587         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
4588                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
4589
4590         i = tx_ring->next_to_use;
4591         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4592         buffer_info = &tx_ring->buffer_info[i];
4593
4594         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
4595         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
4596         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
4597         context_desc->upper_setup.tcp_fields.tucss = tucss;
4598         context_desc->upper_setup.tcp_fields.tucso = tucso;
4599         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
4600         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
4601         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
4602         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
4603
4604         buffer_info->time_stamp = jiffies;
4605         buffer_info->next_to_watch = i;
4606
4607         i++;
4608         if (i == tx_ring->count)
4609                 i = 0;
4610         tx_ring->next_to_use = i;
4611
4612         return 1;
4613 }
4614
4615 static bool e1000_tx_csum(struct e1000_adapter *adapter, struct sk_buff *skb)
4616 {
4617         struct e1000_ring *tx_ring = adapter->tx_ring;
4618         struct e1000_context_desc *context_desc;
4619         struct e1000_buffer *buffer_info;
4620         unsigned int i;
4621         u8 css;
4622         u32 cmd_len = E1000_TXD_CMD_DEXT;
4623         __be16 protocol;
4624
4625         if (skb->ip_summed != CHECKSUM_PARTIAL)
4626                 return 0;
4627
4628         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
4629                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
4630         else
4631                 protocol = skb->protocol;
4632
4633         switch (protocol) {
4634         case cpu_to_be16(ETH_P_IP):
4635                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4636                         cmd_len |= E1000_TXD_CMD_TCP;
4637                 break;
4638         case cpu_to_be16(ETH_P_IPV6):
4639                 /* XXX not handling all IPV6 headers */
4640                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4641                         cmd_len |= E1000_TXD_CMD_TCP;
4642                 break;
4643         default:
4644                 if (unlikely(net_ratelimit()))
4645                         e_warn("checksum_partial proto=%x!\n",
4646                                be16_to_cpu(protocol));
4647                 break;
4648         }
4649
4650         css = skb_checksum_start_offset(skb);
4651
4652         i = tx_ring->next_to_use;
4653         buffer_info = &tx_ring->buffer_info[i];
4654         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4655
4656         context_desc->lower_setup.ip_config = 0;
4657         context_desc->upper_setup.tcp_fields.tucss = css;
4658         context_desc->upper_setup.tcp_fields.tucso =
4659                                 css + skb->csum_offset;
4660         context_desc->upper_setup.tcp_fields.tucse = 0;
4661         context_desc->tcp_seg_setup.data = 0;
4662         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
4663
4664         buffer_info->time_stamp = jiffies;
4665         buffer_info->next_to_watch = i;
4666
4667         i++;
4668         if (i == tx_ring->count)
4669                 i = 0;
4670         tx_ring->next_to_use = i;
4671
4672         return 1;
4673 }
4674
4675 #define E1000_MAX_PER_TXD       8192
4676 #define E1000_MAX_TXD_PWR       12
4677
4678 static int e1000_tx_map(struct e1000_adapter *adapter,
4679                         struct sk_buff *skb, unsigned int first,
4680                         unsigned int max_per_txd, unsigned int nr_frags,
4681                         unsigned int mss)
4682 {
4683         struct e1000_ring *tx_ring = adapter->tx_ring;
4684         struct pci_dev *pdev = adapter->pdev;
4685         struct e1000_buffer *buffer_info;
4686         unsigned int len = skb_headlen(skb);
4687         unsigned int offset = 0, size, count = 0, i;
4688         unsigned int f, bytecount, segs;
4689
4690         i = tx_ring->next_to_use;
4691
4692         while (len) {
4693                 buffer_info = &tx_ring->buffer_info[i];
4694                 size = min(len, max_per_txd);
4695
4696                 buffer_info->length = size;
4697                 buffer_info->time_stamp = jiffies;
4698                 buffer_info->next_to_watch = i;
4699                 buffer_info->dma = dma_map_single(&pdev->dev,
4700                                                   skb->data + offset,
4701                                                   size, DMA_TO_DEVICE);
4702                 buffer_info->mapped_as_page = false;
4703                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4704                         goto dma_error;
4705
4706                 len -= size;
4707                 offset += size;
4708                 count++;
4709
4710                 if (len) {
4711                         i++;
4712                         if (i == tx_ring->count)
4713                                 i = 0;
4714                 }
4715         }
4716
4717         for (f = 0; f < nr_frags; f++) {
4718                 const struct skb_frag_struct *frag;
4719
4720                 frag = &skb_shinfo(skb)->frags[f];
4721                 len = skb_frag_size(frag);
4722                 offset = 0;
4723
4724                 while (len) {
4725                         i++;
4726                         if (i == tx_ring->count)
4727                                 i = 0;
4728
4729                         buffer_info = &tx_ring->buffer_info[i];
4730                         size = min(len, max_per_txd);
4731
4732                         buffer_info->length = size;
4733                         buffer_info->time_stamp = jiffies;
4734                         buffer_info->next_to_watch = i;
4735                         buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
4736                                                 offset, size, DMA_TO_DEVICE);
4737                         buffer_info->mapped_as_page = true;
4738                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4739                                 goto dma_error;
4740
4741                         len -= size;
4742                         offset += size;
4743                         count++;
4744                 }
4745         }
4746
4747         segs = skb_shinfo(skb)->gso_segs ? : 1;
4748         /* multiply data chunks by size of headers */
4749         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
4750
4751         tx_ring->buffer_info[i].skb = skb;
4752         tx_ring->buffer_info[i].segs = segs;
4753         tx_ring->buffer_info[i].bytecount = bytecount;
4754         tx_ring->buffer_info[first].next_to_watch = i;
4755
4756         return count;
4757
4758 dma_error:
4759         dev_err(&pdev->dev, "Tx DMA map failed\n");
4760         buffer_info->dma = 0;
4761         if (count)
4762                 count--;
4763
4764         while (count--) {
4765                 if (i == 0)
4766                         i += tx_ring->count;
4767                 i--;
4768                 buffer_info = &tx_ring->buffer_info[i];
4769                 e1000_put_txbuf(adapter, buffer_info);
4770         }
4771
4772         return 0;
4773 }
4774
4775 static void e1000_tx_queue(struct e1000_adapter *adapter,
4776                            int tx_flags, int count)
4777 {
4778         struct e1000_ring *tx_ring = adapter->tx_ring;
4779         struct e1000_tx_desc *tx_desc = NULL;
4780         struct e1000_buffer *buffer_info;
4781         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
4782         unsigned int i;
4783
4784         if (tx_flags & E1000_TX_FLAGS_TSO) {
4785                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
4786                              E1000_TXD_CMD_TSE;
4787                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4788
4789                 if (tx_flags & E1000_TX_FLAGS_IPV4)
4790                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4791         }
4792
4793         if (tx_flags & E1000_TX_FLAGS_CSUM) {
4794                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4795                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4796         }
4797
4798         if (tx_flags & E1000_TX_FLAGS_VLAN) {
4799                 txd_lower |= E1000_TXD_CMD_VLE;
4800                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4801         }
4802
4803         i = tx_ring->next_to_use;
4804
4805         do {
4806                 buffer_info = &tx_ring->buffer_info[i];
4807                 tx_desc = E1000_TX_DESC(*tx_ring, i);
4808                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4809                 tx_desc->lower.data =
4810                         cpu_to_le32(txd_lower | buffer_info->length);
4811                 tx_desc->upper.data = cpu_to_le32(txd_upper);
4812
4813                 i++;
4814                 if (i == tx_ring->count)
4815                         i = 0;
4816         } while (--count > 0);
4817
4818         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4819
4820         /*
4821          * Force memory writes to complete before letting h/w
4822          * know there are new descriptors to fetch.  (Only
4823          * applicable for weak-ordered memory model archs,
4824          * such as IA-64).
4825          */
4826         wmb();
4827
4828         tx_ring->next_to_use = i;
4829
4830         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
4831                 e1000e_update_tdt_wa(adapter, i);
4832         else
4833                 writel(i, adapter->hw.hw_addr + tx_ring->tail);
4834
4835         /*
4836          * we need this if more than one processor can write to our tail
4837          * at a time, it synchronizes IO on IA64/Altix systems
4838          */
4839         mmiowb();
4840 }
4841
4842 #define MINIMUM_DHCP_PACKET_SIZE 282
4843 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4844                                     struct sk_buff *skb)
4845 {
4846         struct e1000_hw *hw =  &adapter->hw;
4847         u16 length, offset;
4848
4849         if (vlan_tx_tag_present(skb)) {
4850                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4851                     (adapter->hw.mng_cookie.status &
4852                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4853                         return 0;
4854         }
4855
4856         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4857                 return 0;
4858
4859         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4860                 return 0;
4861
4862         {
4863                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4864                 struct udphdr *udp;
4865
4866                 if (ip->protocol != IPPROTO_UDP)
4867                         return 0;
4868
4869                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4870                 if (ntohs(udp->dest) != 67)
4871                         return 0;
4872
4873                 offset = (u8 *)udp + 8 - skb->data;
4874                 length = skb->len - offset;
4875                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4876         }
4877
4878         return 0;
4879 }
4880
4881 static int __e1000_maybe_stop_tx(struct net_device *netdev, int size)
4882 {
4883         struct e1000_adapter *adapter = netdev_priv(netdev);
4884
4885         netif_stop_queue(netdev);
4886         /*
4887          * Herbert's original patch had:
4888          *  smp_mb__after_netif_stop_queue();
4889          * but since that doesn't exist yet, just open code it.
4890          */
4891         smp_mb();
4892
4893         /*
4894          * We need to check again in a case another CPU has just
4895          * made room available.
4896          */
4897         if (e1000_desc_unused(adapter->tx_ring) < size)
4898                 return -EBUSY;
4899
4900         /* A reprieve! */
4901         netif_start_queue(netdev);
4902         ++adapter->restart_queue;
4903         return 0;
4904 }
4905
4906 static int e1000_maybe_stop_tx(struct net_device *netdev, int size)
4907 {
4908         struct e1000_adapter *adapter = netdev_priv(netdev);
4909
4910         if (e1000_desc_unused(adapter->tx_ring) >= size)
4911                 return 0;
4912         return __e1000_maybe_stop_tx(netdev, size);
4913 }
4914
4915 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1 )
4916 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
4917                                     struct net_device *netdev)
4918 {
4919         struct e1000_adapter *adapter = netdev_priv(netdev);
4920         struct e1000_ring *tx_ring = adapter->tx_ring;
4921         unsigned int first;
4922         unsigned int max_per_txd = E1000_MAX_PER_TXD;
4923         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
4924         unsigned int tx_flags = 0;
4925         unsigned int len = skb_headlen(skb);
4926         unsigned int nr_frags;
4927         unsigned int mss;
4928         int count = 0;
4929         int tso;
4930         unsigned int f;
4931
4932         if (test_bit(__E1000_DOWN, &adapter->state)) {
4933                 dev_kfree_skb_any(skb);
4934                 return NETDEV_TX_OK;
4935         }
4936
4937         if (skb->len <= 0) {
4938                 dev_kfree_skb_any(skb);
4939                 return NETDEV_TX_OK;
4940         }
4941
4942         mss = skb_shinfo(skb)->gso_size;
4943         /*
4944          * The controller does a simple calculation to
4945          * make sure there is enough room in the FIFO before
4946          * initiating the DMA for each buffer.  The calc is:
4947          * 4 = ceil(buffer len/mss).  To make sure we don't
4948          * overrun the FIFO, adjust the max buffer len if mss
4949          * drops.
4950          */
4951         if (mss) {
4952                 u8 hdr_len;
4953                 max_per_txd = min(mss << 2, max_per_txd);
4954                 max_txd_pwr = fls(max_per_txd) - 1;
4955
4956                 /*
4957                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
4958                  * points to just header, pull a few bytes of payload from
4959                  * frags into skb->data
4960                  */
4961                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4962                 /*
4963                  * we do this workaround for ES2LAN, but it is un-necessary,
4964                  * avoiding it could save a lot of cycles
4965                  */
4966                 if (skb->data_len && (hdr_len == len)) {
4967                         unsigned int pull_size;
4968
4969                         pull_size = min((unsigned int)4, skb->data_len);
4970                         if (!__pskb_pull_tail(skb, pull_size)) {
4971                                 e_err("__pskb_pull_tail failed.\n");
4972                                 dev_kfree_skb_any(skb);
4973                                 return NETDEV_TX_OK;
4974                         }
4975                         len = skb_headlen(skb);
4976                 }
4977         }
4978
4979         /* reserve a descriptor for the offload context */
4980         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
4981                 count++;
4982         count++;
4983
4984         count += TXD_USE_COUNT(len, max_txd_pwr);
4985
4986         nr_frags = skb_shinfo(skb)->nr_frags;
4987         for (f = 0; f < nr_frags; f++)
4988                 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
4989                                        max_txd_pwr);
4990
4991         if (adapter->hw.mac.tx_pkt_filtering)
4992                 e1000_transfer_dhcp_info(adapter, skb);
4993
4994         /*
4995          * need: count + 2 desc gap to keep tail from touching
4996          * head, otherwise try next time
4997          */
4998         if (e1000_maybe_stop_tx(netdev, count + 2))
4999                 return NETDEV_TX_BUSY;
5000
5001         if (vlan_tx_tag_present(skb)) {
5002                 tx_flags |= E1000_TX_FLAGS_VLAN;
5003                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5004         }
5005
5006         first = tx_ring->next_to_use;
5007
5008         tso = e1000_tso(adapter, skb);
5009         if (tso < 0) {
5010                 dev_kfree_skb_any(skb);
5011                 return NETDEV_TX_OK;
5012         }
5013
5014         if (tso)
5015                 tx_flags |= E1000_TX_FLAGS_TSO;
5016         else if (e1000_tx_csum(adapter, skb))
5017                 tx_flags |= E1000_TX_FLAGS_CSUM;
5018
5019         /*
5020          * Old method was to assume IPv4 packet by default if TSO was enabled.
5021          * 82571 hardware supports TSO capabilities for IPv6 as well...
5022          * no longer assume, we must.
5023          */
5024         if (skb->protocol == htons(ETH_P_IP))
5025                 tx_flags |= E1000_TX_FLAGS_IPV4;
5026
5027         /* if count is 0 then mapping error has occurred */
5028         count = e1000_tx_map(adapter, skb, first, max_per_txd, nr_frags, mss);
5029         if (count) {
5030                 e1000_tx_queue(adapter, tx_flags, count);
5031                 /* Make sure there is space in the ring for the next send. */
5032                 e1000_maybe_stop_tx(netdev, MAX_SKB_FRAGS + 2);
5033
5034         } else {
5035                 dev_kfree_skb_any(skb);
5036                 tx_ring->buffer_info[first].time_stamp = 0;
5037                 tx_ring->next_to_use = first;
5038         }
5039
5040         return NETDEV_TX_OK;
5041 }
5042
5043 /**
5044  * e1000_tx_timeout - Respond to a Tx Hang
5045  * @netdev: network interface device structure
5046  **/
5047 static void e1000_tx_timeout(struct net_device *netdev)
5048 {
5049         struct e1000_adapter *adapter = netdev_priv(netdev);
5050
5051         /* Do the reset outside of interrupt context */
5052         adapter->tx_timeout_count++;
5053         schedule_work(&adapter->reset_task);
5054 }
5055
5056 static void e1000_reset_task(struct work_struct *work)
5057 {
5058         struct e1000_adapter *adapter;
5059         adapter = container_of(work, struct e1000_adapter, reset_task);
5060
5061         /* don't run the task if already down */
5062         if (test_bit(__E1000_DOWN, &adapter->state))
5063                 return;
5064
5065         if (!((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
5066               (adapter->flags & FLAG_RX_RESTART_NOW))) {
5067                 e1000e_dump(adapter);
5068                 e_err("Reset adapter\n");
5069         }
5070         e1000e_reinit_locked(adapter);
5071 }
5072
5073 /**
5074  * e1000_get_stats64 - Get System Network Statistics
5075  * @netdev: network interface device structure
5076  * @stats: rtnl_link_stats64 pointer
5077  *
5078  * Returns the address of the device statistics structure.
5079  **/
5080 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5081                                              struct rtnl_link_stats64 *stats)
5082 {
5083         struct e1000_adapter *adapter = netdev_priv(netdev);
5084
5085         memset(stats, 0, sizeof(struct rtnl_link_stats64));
5086         spin_lock(&adapter->stats64_lock);
5087         e1000e_update_stats(adapter);
5088         /* Fill out the OS statistics structure */
5089         stats->rx_bytes = adapter->stats.gorc;
5090         stats->rx_packets = adapter->stats.gprc;
5091         stats->tx_bytes = adapter->stats.gotc;
5092         stats->tx_packets = adapter->stats.gptc;
5093         stats->multicast = adapter->stats.mprc;
5094         stats->collisions = adapter->stats.colc;
5095
5096         /* Rx Errors */
5097
5098         /*
5099          * RLEC on some newer hardware can be incorrect so build
5100          * our own version based on RUC and ROC
5101          */
5102         stats->rx_errors = adapter->stats.rxerrc +
5103                 adapter->stats.crcerrs + adapter->stats.algnerrc +
5104                 adapter->stats.ruc + adapter->stats.roc +
5105                 adapter->stats.cexterr;
5106         stats->rx_length_errors = adapter->stats.ruc +
5107                                               adapter->stats.roc;
5108         stats->rx_crc_errors = adapter->stats.crcerrs;
5109         stats->rx_frame_errors = adapter->stats.algnerrc;
5110         stats->rx_missed_errors = adapter->stats.mpc;
5111
5112         /* Tx Errors */
5113         stats->tx_errors = adapter->stats.ecol +
5114                                        adapter->stats.latecol;
5115         stats->tx_aborted_errors = adapter->stats.ecol;
5116         stats->tx_window_errors = adapter->stats.latecol;
5117         stats->tx_carrier_errors = adapter->stats.tncrs;
5118
5119         /* Tx Dropped needs to be maintained elsewhere */
5120
5121         spin_unlock(&adapter->stats64_lock);
5122         return stats;
5123 }
5124
5125 /**
5126  * e1000_change_mtu - Change the Maximum Transfer Unit
5127  * @netdev: network interface device structure
5128  * @new_mtu: new value for maximum frame size
5129  *
5130  * Returns 0 on success, negative on failure
5131  **/
5132 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5133 {
5134         struct e1000_adapter *adapter = netdev_priv(netdev);
5135         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5136
5137         /* Jumbo frame support */
5138         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5139             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5140                 e_err("Jumbo Frames not supported.\n");
5141                 return -EINVAL;
5142         }
5143
5144         /* Supported frame sizes */
5145         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5146             (max_frame > adapter->max_hw_frame_size)) {
5147                 e_err("Unsupported MTU setting\n");
5148                 return -EINVAL;
5149         }
5150
5151         /* Jumbo frame workaround on 82579 requires CRC be stripped */
5152         if ((adapter->hw.mac.type == e1000_pch2lan) &&
5153             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5154             (new_mtu > ETH_DATA_LEN)) {
5155                 e_err("Jumbo Frames not supported on 82579 when CRC stripping is disabled.\n");
5156                 return -EINVAL;
5157         }
5158
5159         /* 82573 Errata 17 */
5160         if (((adapter->hw.mac.type == e1000_82573) ||
5161              (adapter->hw.mac.type == e1000_82574)) &&
5162             (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN)) {
5163                 adapter->flags2 |= FLAG2_DISABLE_ASPM_L1;
5164                 e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L1);
5165         }
5166
5167         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5168                 usleep_range(1000, 2000);
5169         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5170         adapter->max_frame_size = max_frame;
5171         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5172         netdev->mtu = new_mtu;
5173         if (netif_running(netdev))
5174                 e1000e_down(adapter);
5175
5176         /*
5177          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5178          * means we reserve 2 more, this pushes us to allocate from the next
5179          * larger slab size.
5180          * i.e. RXBUFFER_2048 --> size-4096 slab
5181          * However with the new *_jumbo_rx* routines, jumbo receives will use
5182          * fragmented skbs
5183          */
5184
5185         if (max_frame <= 2048)
5186                 adapter->rx_buffer_len = 2048;
5187         else
5188                 adapter->rx_buffer_len = 4096;
5189
5190         /* adjust allocation if LPE protects us, and we aren't using SBP */
5191         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5192              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5193                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5194                                          + ETH_FCS_LEN;
5195
5196         if (netif_running(netdev))
5197                 e1000e_up(adapter);
5198         else
5199                 e1000e_reset(adapter);
5200
5201         clear_bit(__E1000_RESETTING, &adapter->state);
5202
5203         return 0;
5204 }
5205
5206 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5207                            int cmd)
5208 {
5209         struct e1000_adapter *adapter = netdev_priv(netdev);
5210         struct mii_ioctl_data *data = if_mii(ifr);
5211
5212         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5213                 return -EOPNOTSUPP;
5214
5215         switch (cmd) {
5216         case SIOCGMIIPHY:
5217                 data->phy_id = adapter->hw.phy.addr;
5218                 break;
5219         case SIOCGMIIREG:
5220                 e1000_phy_read_status(adapter);
5221
5222                 switch (data->reg_num & 0x1F) {
5223                 case MII_BMCR:
5224                         data->val_out = adapter->phy_regs.bmcr;
5225                         break;
5226                 case MII_BMSR:
5227                         data->val_out = adapter->phy_regs.bmsr;
5228                         break;
5229                 case MII_PHYSID1:
5230                         data->val_out = (adapter->hw.phy.id >> 16);
5231                         break;
5232                 case MII_PHYSID2:
5233                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
5234                         break;
5235                 case MII_ADVERTISE:
5236                         data->val_out = adapter->phy_regs.advertise;
5237                         break;
5238                 case MII_LPA:
5239                         data->val_out = adapter->phy_regs.lpa;
5240                         break;
5241                 case MII_EXPANSION:
5242                         data->val_out = adapter->phy_regs.expansion;
5243                         break;
5244                 case MII_CTRL1000:
5245                         data->val_out = adapter->phy_regs.ctrl1000;
5246                         break;
5247                 case MII_STAT1000:
5248                         data->val_out = adapter->phy_regs.stat1000;
5249                         break;
5250                 case MII_ESTATUS:
5251                         data->val_out = adapter->phy_regs.estatus;
5252                         break;
5253                 default:
5254                         return -EIO;
5255                 }
5256                 break;
5257         case SIOCSMIIREG:
5258         default:
5259                 return -EOPNOTSUPP;
5260         }
5261         return 0;
5262 }
5263
5264 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5265 {
5266         switch (cmd) {
5267         case SIOCGMIIPHY:
5268         case SIOCGMIIREG:
5269         case SIOCSMIIREG:
5270                 return e1000_mii_ioctl(netdev, ifr, cmd);
5271         default:
5272                 return -EOPNOTSUPP;
5273         }
5274 }
5275
5276 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5277 {
5278         struct e1000_hw *hw = &adapter->hw;
5279         u32 i, mac_reg;
5280         u16 phy_reg, wuc_enable;
5281         int retval = 0;
5282
5283         /* copy MAC RARs to PHY RARs */
5284         e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5285
5286         retval = hw->phy.ops.acquire(hw);
5287         if (retval) {
5288                 e_err("Could not acquire PHY\n");
5289                 return retval;
5290         }
5291
5292         /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5293         retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5294         if (retval)
5295                 goto out;
5296
5297         /* copy MAC MTA to PHY MTA - only needed for pchlan */
5298         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5299                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5300                 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5301                                            (u16)(mac_reg & 0xFFFF));
5302                 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5303                                            (u16)((mac_reg >> 16) & 0xFFFF));
5304         }
5305
5306         /* configure PHY Rx Control register */
5307         hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5308         mac_reg = er32(RCTL);
5309         if (mac_reg & E1000_RCTL_UPE)
5310                 phy_reg |= BM_RCTL_UPE;
5311         if (mac_reg & E1000_RCTL_MPE)
5312                 phy_reg |= BM_RCTL_MPE;
5313         phy_reg &= ~(BM_RCTL_MO_MASK);
5314         if (mac_reg & E1000_RCTL_MO_3)
5315                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5316                                 << BM_RCTL_MO_SHIFT);
5317         if (mac_reg & E1000_RCTL_BAM)
5318                 phy_reg |= BM_RCTL_BAM;
5319         if (mac_reg & E1000_RCTL_PMCF)
5320                 phy_reg |= BM_RCTL_PMCF;
5321         mac_reg = er32(CTRL);
5322         if (mac_reg & E1000_CTRL_RFCE)
5323                 phy_reg |= BM_RCTL_RFCE;
5324         hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5325
5326         /* enable PHY wakeup in MAC register */
5327         ew32(WUFC, wufc);
5328         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5329
5330         /* configure and enable PHY wakeup in PHY registers */
5331         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5332         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5333
5334         /* activate PHY wakeup */
5335         wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5336         retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5337         if (retval)
5338                 e_err("Could not set PHY Host Wakeup bit\n");
5339 out:
5340         hw->phy.ops.release(hw);
5341
5342         return retval;
5343 }
5344
5345 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
5346                             bool runtime)
5347 {
5348         struct net_device *netdev = pci_get_drvdata(pdev);
5349         struct e1000_adapter *adapter = netdev_priv(netdev);
5350         struct e1000_hw *hw = &adapter->hw;
5351         u32 ctrl, ctrl_ext, rctl, status;
5352         /* Runtime suspend should only enable wakeup for link changes */
5353         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5354         int retval = 0;
5355
5356         netif_device_detach(netdev);
5357
5358         if (netif_running(netdev)) {
5359                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5360                 e1000e_down(adapter);
5361                 e1000_free_irq(adapter);
5362         }
5363         e1000e_reset_interrupt_capability(adapter);
5364
5365         retval = pci_save_state(pdev);
5366         if (retval)
5367                 return retval;
5368
5369         status = er32(STATUS);
5370         if (status & E1000_STATUS_LU)
5371                 wufc &= ~E1000_WUFC_LNKC;
5372
5373         if (wufc) {
5374                 e1000_setup_rctl(adapter);
5375                 e1000e_set_rx_mode(netdev);
5376
5377                 /* turn on all-multi mode if wake on multicast is enabled */
5378                 if (wufc & E1000_WUFC_MC) {
5379                         rctl = er32(RCTL);
5380                         rctl |= E1000_RCTL_MPE;
5381                         ew32(RCTL, rctl);
5382                 }
5383
5384                 ctrl = er32(CTRL);
5385                 /* advertise wake from D3Cold */
5386                 #define E1000_CTRL_ADVD3WUC 0x00100000
5387                 /* phy power management enable */
5388                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5389                 ctrl |= E1000_CTRL_ADVD3WUC;
5390                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5391                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5392                 ew32(CTRL, ctrl);
5393
5394                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5395                     adapter->hw.phy.media_type ==
5396                     e1000_media_type_internal_serdes) {
5397                         /* keep the laser running in D3 */
5398                         ctrl_ext = er32(CTRL_EXT);
5399                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5400                         ew32(CTRL_EXT, ctrl_ext);
5401                 }
5402
5403                 if (adapter->flags & FLAG_IS_ICH)
5404                         e1000_suspend_workarounds_ich8lan(&adapter->hw);
5405
5406                 /* Allow time for pending master requests to run */
5407                 e1000e_disable_pcie_master(&adapter->hw);
5408
5409                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5410                         /* enable wakeup by the PHY */
5411                         retval = e1000_init_phy_wakeup(adapter, wufc);
5412                         if (retval)
5413                                 return retval;
5414                 } else {
5415                         /* enable wakeup by the MAC */
5416                         ew32(WUFC, wufc);
5417                         ew32(WUC, E1000_WUC_PME_EN);
5418                 }
5419         } else {
5420                 ew32(WUC, 0);
5421                 ew32(WUFC, 0);
5422         }
5423
5424         *enable_wake = !!wufc;
5425
5426         /* make sure adapter isn't asleep if manageability is enabled */
5427         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
5428             (hw->mac.ops.check_mng_mode(hw)))
5429                 *enable_wake = true;
5430
5431         if (adapter->hw.phy.type == e1000_phy_igp_3)
5432                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5433
5434         /*
5435          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5436          * would have already happened in close and is redundant.
5437          */
5438         e1000e_release_hw_control(adapter);
5439
5440         pci_disable_device(pdev);
5441
5442         return 0;
5443 }
5444
5445 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
5446 {
5447         if (sleep && wake) {
5448                 pci_prepare_to_sleep(pdev);
5449                 return;
5450         }
5451
5452         pci_wake_from_d3(pdev, wake);
5453         pci_set_power_state(pdev, PCI_D3hot);
5454 }
5455
5456 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
5457                                     bool wake)
5458 {
5459         struct net_device *netdev = pci_get_drvdata(pdev);
5460         struct e1000_adapter *adapter = netdev_priv(netdev);
5461
5462         /*
5463          * The pci-e switch on some quad port adapters will report a
5464          * correctable error when the MAC transitions from D0 to D3.  To
5465          * prevent this we need to mask off the correctable errors on the
5466          * downstream port of the pci-e switch.
5467          */
5468         if (adapter->flags & FLAG_IS_QUAD_PORT) {
5469                 struct pci_dev *us_dev = pdev->bus->self;
5470                 int pos = pci_pcie_cap(us_dev);
5471                 u16 devctl;
5472
5473                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
5474                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
5475                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
5476
5477                 e1000_power_off(pdev, sleep, wake);
5478
5479                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
5480         } else {
5481                 e1000_power_off(pdev, sleep, wake);
5482         }
5483 }
5484
5485 #ifdef CONFIG_PCIEASPM
5486 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5487 {
5488         pci_disable_link_state_locked(pdev, state);
5489 }
5490 #else
5491 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5492 {
5493         int pos;
5494         u16 reg16;
5495
5496         /*
5497          * Both device and parent should have the same ASPM setting.
5498          * Disable ASPM in downstream component first and then upstream.
5499          */
5500         pos = pci_pcie_cap(pdev);
5501         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
5502         reg16 &= ~state;
5503         pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16);
5504
5505         if (!pdev->bus->self)
5506                 return;
5507
5508         pos = pci_pcie_cap(pdev->bus->self);
5509         pci_read_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, &reg16);
5510         reg16 &= ~state;
5511         pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16);
5512 }
5513 #endif
5514 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5515 {
5516         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
5517                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
5518                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
5519
5520         __e1000e_disable_aspm(pdev, state);
5521 }
5522
5523 #ifdef CONFIG_PM
5524 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
5525 {
5526         return !!adapter->tx_ring->buffer_info;
5527 }
5528
5529 static int __e1000_resume(struct pci_dev *pdev)
5530 {
5531         struct net_device *netdev = pci_get_drvdata(pdev);
5532         struct e1000_adapter *adapter = netdev_priv(netdev);
5533         struct e1000_hw *hw = &adapter->hw;
5534         u16 aspm_disable_flag = 0;
5535         u32 err;
5536
5537         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5538                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5539         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5540                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5541         if (aspm_disable_flag)
5542                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5543
5544         pci_set_power_state(pdev, PCI_D0);
5545         pci_restore_state(pdev);
5546         pci_save_state(pdev);
5547
5548         e1000e_set_interrupt_capability(adapter);
5549         if (netif_running(netdev)) {
5550                 err = e1000_request_irq(adapter);
5551                 if (err)
5552                         return err;
5553         }
5554
5555         if (hw->mac.type == e1000_pch2lan)
5556                 e1000_resume_workarounds_pchlan(&adapter->hw);
5557
5558         e1000e_power_up_phy(adapter);
5559
5560         /* report the system wakeup cause from S3/S4 */
5561         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5562                 u16 phy_data;
5563
5564                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
5565                 if (phy_data) {
5566                         e_info("PHY Wakeup cause - %s\n",
5567                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
5568                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
5569                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
5570                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
5571                                 phy_data & E1000_WUS_LNKC ?
5572                                 "Link Status Change" : "other");
5573                 }
5574                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
5575         } else {
5576                 u32 wus = er32(WUS);
5577                 if (wus) {
5578                         e_info("MAC Wakeup cause - %s\n",
5579                                 wus & E1000_WUS_EX ? "Unicast Packet" :
5580                                 wus & E1000_WUS_MC ? "Multicast Packet" :
5581                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
5582                                 wus & E1000_WUS_MAG ? "Magic Packet" :
5583                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
5584                                 "other");
5585                 }
5586                 ew32(WUS, ~0);
5587         }
5588
5589         e1000e_reset(adapter);
5590
5591         e1000_init_manageability_pt(adapter);
5592
5593         if (netif_running(netdev))
5594                 e1000e_up(adapter);
5595
5596         netif_device_attach(netdev);
5597
5598         /*
5599          * If the controller has AMT, do not set DRV_LOAD until the interface
5600          * is up.  For all other cases, let the f/w know that the h/w is now
5601          * under the control of the driver.
5602          */
5603         if (!(adapter->flags & FLAG_HAS_AMT))
5604                 e1000e_get_hw_control(adapter);
5605
5606         return 0;
5607 }
5608
5609 #ifdef CONFIG_PM_SLEEP
5610 static int e1000_suspend(struct device *dev)
5611 {
5612         struct pci_dev *pdev = to_pci_dev(dev);
5613         int retval;
5614         bool wake;
5615
5616         retval = __e1000_shutdown(pdev, &wake, false);
5617         if (!retval)
5618                 e1000_complete_shutdown(pdev, true, wake);
5619
5620         return retval;
5621 }
5622
5623 static int e1000_resume(struct device *dev)
5624 {
5625         struct pci_dev *pdev = to_pci_dev(dev);
5626         struct net_device *netdev = pci_get_drvdata(pdev);
5627         struct e1000_adapter *adapter = netdev_priv(netdev);
5628
5629         if (e1000e_pm_ready(adapter))
5630                 adapter->idle_check = true;
5631
5632         return __e1000_resume(pdev);
5633 }
5634 #endif /* CONFIG_PM_SLEEP */
5635
5636 #ifdef CONFIG_PM_RUNTIME
5637 static int e1000_runtime_suspend(struct device *dev)
5638 {
5639         struct pci_dev *pdev = to_pci_dev(dev);
5640         struct net_device *netdev = pci_get_drvdata(pdev);
5641         struct e1000_adapter *adapter = netdev_priv(netdev);
5642
5643         if (e1000e_pm_ready(adapter)) {
5644                 bool wake;
5645
5646                 __e1000_shutdown(pdev, &wake, true);
5647         }
5648
5649         return 0;
5650 }
5651
5652 static int e1000_idle(struct device *dev)
5653 {
5654         struct pci_dev *pdev = to_pci_dev(dev);
5655         struct net_device *netdev = pci_get_drvdata(pdev);
5656         struct e1000_adapter *adapter = netdev_priv(netdev);
5657
5658         if (!e1000e_pm_ready(adapter))
5659                 return 0;
5660
5661         if (adapter->idle_check) {
5662                 adapter->idle_check = false;
5663                 if (!e1000e_has_link(adapter))
5664                         pm_schedule_suspend(dev, MSEC_PER_SEC);
5665         }
5666
5667         return -EBUSY;
5668 }
5669
5670 static int e1000_runtime_resume(struct device *dev)
5671 {
5672         struct pci_dev *pdev = to_pci_dev(dev);
5673         struct net_device *netdev = pci_get_drvdata(pdev);
5674         struct e1000_adapter *adapter = netdev_priv(netdev);
5675
5676         if (!e1000e_pm_ready(adapter))
5677                 return 0;
5678
5679         adapter->idle_check = !dev->power.runtime_auto;
5680         return __e1000_resume(pdev);
5681 }
5682 #endif /* CONFIG_PM_RUNTIME */
5683 #endif /* CONFIG_PM */
5684
5685 static void e1000_shutdown(struct pci_dev *pdev)
5686 {
5687         bool wake = false;
5688
5689         __e1000_shutdown(pdev, &wake, false);
5690
5691         if (system_state == SYSTEM_POWER_OFF)
5692                 e1000_complete_shutdown(pdev, false, wake);
5693 }
5694
5695 #ifdef CONFIG_NET_POLL_CONTROLLER
5696
5697 static irqreturn_t e1000_intr_msix(int irq, void *data)
5698 {
5699         struct net_device *netdev = data;
5700         struct e1000_adapter *adapter = netdev_priv(netdev);
5701
5702         if (adapter->msix_entries) {
5703                 int vector, msix_irq;
5704
5705                 vector = 0;
5706                 msix_irq = adapter->msix_entries[vector].vector;
5707                 disable_irq(msix_irq);
5708                 e1000_intr_msix_rx(msix_irq, netdev);
5709                 enable_irq(msix_irq);
5710
5711                 vector++;
5712                 msix_irq = adapter->msix_entries[vector].vector;
5713                 disable_irq(msix_irq);
5714                 e1000_intr_msix_tx(msix_irq, netdev);
5715                 enable_irq(msix_irq);
5716
5717                 vector++;
5718                 msix_irq = adapter->msix_entries[vector].vector;
5719                 disable_irq(msix_irq);
5720                 e1000_msix_other(msix_irq, netdev);
5721                 enable_irq(msix_irq);
5722         }
5723
5724         return IRQ_HANDLED;
5725 }
5726
5727 /*
5728  * Polling 'interrupt' - used by things like netconsole to send skbs
5729  * without having to re-enable interrupts. It's not called while
5730  * the interrupt routine is executing.
5731  */
5732 static void e1000_netpoll(struct net_device *netdev)
5733 {
5734         struct e1000_adapter *adapter = netdev_priv(netdev);
5735
5736         switch (adapter->int_mode) {
5737         case E1000E_INT_MODE_MSIX:
5738                 e1000_intr_msix(adapter->pdev->irq, netdev);
5739                 break;
5740         case E1000E_INT_MODE_MSI:
5741                 disable_irq(adapter->pdev->irq);
5742                 e1000_intr_msi(adapter->pdev->irq, netdev);
5743                 enable_irq(adapter->pdev->irq);
5744                 break;
5745         default: /* E1000E_INT_MODE_LEGACY */
5746                 disable_irq(adapter->pdev->irq);
5747                 e1000_intr(adapter->pdev->irq, netdev);
5748                 enable_irq(adapter->pdev->irq);
5749                 break;
5750         }
5751 }
5752 #endif
5753
5754 /**
5755  * e1000_io_error_detected - called when PCI error is detected
5756  * @pdev: Pointer to PCI device
5757  * @state: The current pci connection state
5758  *
5759  * This function is called after a PCI bus error affecting
5760  * this device has been detected.
5761  */
5762 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5763                                                 pci_channel_state_t state)
5764 {
5765         struct net_device *netdev = pci_get_drvdata(pdev);
5766         struct e1000_adapter *adapter = netdev_priv(netdev);
5767
5768         netif_device_detach(netdev);
5769
5770         if (state == pci_channel_io_perm_failure)
5771                 return PCI_ERS_RESULT_DISCONNECT;
5772
5773         if (netif_running(netdev))
5774                 e1000e_down(adapter);
5775         pci_disable_device(pdev);
5776
5777         /* Request a slot slot reset. */
5778         return PCI_ERS_RESULT_NEED_RESET;
5779 }
5780
5781 /**
5782  * e1000_io_slot_reset - called after the pci bus has been reset.
5783  * @pdev: Pointer to PCI device
5784  *
5785  * Restart the card from scratch, as if from a cold-boot. Implementation
5786  * resembles the first-half of the e1000_resume routine.
5787  */
5788 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5789 {
5790         struct net_device *netdev = pci_get_drvdata(pdev);
5791         struct e1000_adapter *adapter = netdev_priv(netdev);
5792         struct e1000_hw *hw = &adapter->hw;
5793         u16 aspm_disable_flag = 0;
5794         int err;
5795         pci_ers_result_t result;
5796
5797         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5798                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5799         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5800                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5801         if (aspm_disable_flag)
5802                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5803
5804         err = pci_enable_device_mem(pdev);
5805         if (err) {
5806                 dev_err(&pdev->dev,
5807                         "Cannot re-enable PCI device after reset.\n");
5808                 result = PCI_ERS_RESULT_DISCONNECT;
5809         } else {
5810                 pci_set_master(pdev);
5811                 pdev->state_saved = true;
5812                 pci_restore_state(pdev);
5813
5814                 pci_enable_wake(pdev, PCI_D3hot, 0);
5815                 pci_enable_wake(pdev, PCI_D3cold, 0);
5816
5817                 e1000e_reset(adapter);
5818                 ew32(WUS, ~0);
5819                 result = PCI_ERS_RESULT_RECOVERED;
5820         }
5821
5822         pci_cleanup_aer_uncorrect_error_status(pdev);
5823
5824         return result;
5825 }
5826
5827 /**
5828  * e1000_io_resume - called when traffic can start flowing again.
5829  * @pdev: Pointer to PCI device
5830  *
5831  * This callback is called when the error recovery driver tells us that
5832  * its OK to resume normal operation. Implementation resembles the
5833  * second-half of the e1000_resume routine.
5834  */
5835 static void e1000_io_resume(struct pci_dev *pdev)
5836 {
5837         struct net_device *netdev = pci_get_drvdata(pdev);
5838         struct e1000_adapter *adapter = netdev_priv(netdev);
5839
5840         e1000_init_manageability_pt(adapter);
5841
5842         if (netif_running(netdev)) {
5843                 if (e1000e_up(adapter)) {
5844                         dev_err(&pdev->dev,
5845                                 "can't bring device back up after reset\n");
5846                         return;
5847                 }
5848         }
5849
5850         netif_device_attach(netdev);
5851
5852         /*
5853          * If the controller has AMT, do not set DRV_LOAD until the interface
5854          * is up.  For all other cases, let the f/w know that the h/w is now
5855          * under the control of the driver.
5856          */
5857         if (!(adapter->flags & FLAG_HAS_AMT))
5858                 e1000e_get_hw_control(adapter);
5859
5860 }
5861
5862 static void e1000_print_device_info(struct e1000_adapter *adapter)
5863 {
5864         struct e1000_hw *hw = &adapter->hw;
5865         struct net_device *netdev = adapter->netdev;
5866         u32 ret_val;
5867         u8 pba_str[E1000_PBANUM_LENGTH];
5868
5869         /* print bus type/speed/width info */
5870         e_info("(PCI Express:2.5GT/s:%s) %pM\n",
5871                /* bus width */
5872                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
5873                 "Width x1"),
5874                /* MAC address */
5875                netdev->dev_addr);
5876         e_info("Intel(R) PRO/%s Network Connection\n",
5877                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
5878         ret_val = e1000_read_pba_string_generic(hw, pba_str,
5879                                                 E1000_PBANUM_LENGTH);
5880         if (ret_val)
5881                 strncpy((char *)pba_str, "Unknown", sizeof(pba_str) - 1);
5882         e_info("MAC: %d, PHY: %d, PBA No: %s\n",
5883                hw->mac.type, hw->phy.type, pba_str);
5884 }
5885
5886 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
5887 {
5888         struct e1000_hw *hw = &adapter->hw;
5889         int ret_val;
5890         u16 buf = 0;
5891
5892         if (hw->mac.type != e1000_82573)
5893                 return;
5894
5895         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
5896         if (!ret_val && (!(le16_to_cpu(buf) & (1 << 0)))) {
5897                 /* Deep Smart Power Down (DSPD) */
5898                 dev_warn(&adapter->pdev->dev,
5899                          "Warning: detected DSPD enabled in EEPROM\n");
5900         }
5901 }
5902
5903 static int e1000_set_features(struct net_device *netdev, u32 features)
5904 {
5905         struct e1000_adapter *adapter = netdev_priv(netdev);
5906         u32 changed = features ^ netdev->features;
5907
5908         if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
5909                 adapter->flags |= FLAG_TSO_FORCE;
5910
5911         if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
5912                          NETIF_F_RXCSUM)))
5913                 return 0;
5914
5915         if (netif_running(netdev))
5916                 e1000e_reinit_locked(adapter);
5917         else
5918                 e1000e_reset(adapter);
5919
5920         return 0;
5921 }
5922
5923 static const struct net_device_ops e1000e_netdev_ops = {
5924         .ndo_open               = e1000_open,
5925         .ndo_stop               = e1000_close,
5926         .ndo_start_xmit         = e1000_xmit_frame,
5927         .ndo_get_stats64        = e1000e_get_stats64,
5928         .ndo_set_rx_mode        = e1000e_set_rx_mode,
5929         .ndo_set_mac_address    = e1000_set_mac,
5930         .ndo_change_mtu         = e1000_change_mtu,
5931         .ndo_do_ioctl           = e1000_ioctl,
5932         .ndo_tx_timeout         = e1000_tx_timeout,
5933         .ndo_validate_addr      = eth_validate_addr,
5934
5935         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
5936         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
5937 #ifdef CONFIG_NET_POLL_CONTROLLER
5938         .ndo_poll_controller    = e1000_netpoll,
5939 #endif
5940         .ndo_set_features = e1000_set_features,
5941 };
5942
5943 /**
5944  * e1000_probe - Device Initialization Routine
5945  * @pdev: PCI device information struct
5946  * @ent: entry in e1000_pci_tbl
5947  *
5948  * Returns 0 on success, negative on failure
5949  *
5950  * e1000_probe initializes an adapter identified by a pci_dev structure.
5951  * The OS initialization, configuring of the adapter private structure,
5952  * and a hardware reset occur.
5953  **/
5954 static int __devinit e1000_probe(struct pci_dev *pdev,
5955                                  const struct pci_device_id *ent)
5956 {
5957         struct net_device *netdev;
5958         struct e1000_adapter *adapter;
5959         struct e1000_hw *hw;
5960         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
5961         resource_size_t mmio_start, mmio_len;
5962         resource_size_t flash_start, flash_len;
5963
5964         static int cards_found;
5965         u16 aspm_disable_flag = 0;
5966         int i, err, pci_using_dac;
5967         u16 eeprom_data = 0;
5968         u16 eeprom_apme_mask = E1000_EEPROM_APME;
5969
5970         if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
5971                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5972         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
5973                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5974         if (aspm_disable_flag)
5975                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5976
5977         err = pci_enable_device_mem(pdev);
5978         if (err)
5979                 return err;
5980
5981         pci_using_dac = 0;
5982         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
5983         if (!err) {
5984                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
5985                 if (!err)
5986                         pci_using_dac = 1;
5987         } else {
5988                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
5989                 if (err) {
5990                         err = dma_set_coherent_mask(&pdev->dev,
5991                                                     DMA_BIT_MASK(32));
5992                         if (err) {
5993                                 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
5994                                 goto err_dma;
5995                         }
5996                 }
5997         }
5998
5999         err = pci_request_selected_regions_exclusive(pdev,
6000                                           pci_select_bars(pdev, IORESOURCE_MEM),
6001                                           e1000e_driver_name);
6002         if (err)
6003                 goto err_pci_reg;
6004
6005         /* AER (Advanced Error Reporting) hooks */
6006         pci_enable_pcie_error_reporting(pdev);
6007
6008         pci_set_master(pdev);
6009         /* PCI config space info */
6010         err = pci_save_state(pdev);
6011         if (err)
6012                 goto err_alloc_etherdev;
6013
6014         err = -ENOMEM;
6015         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6016         if (!netdev)
6017                 goto err_alloc_etherdev;
6018
6019         SET_NETDEV_DEV(netdev, &pdev->dev);
6020
6021         netdev->irq = pdev->irq;
6022
6023         pci_set_drvdata(pdev, netdev);
6024         adapter = netdev_priv(netdev);
6025         hw = &adapter->hw;
6026         adapter->netdev = netdev;
6027         adapter->pdev = pdev;
6028         adapter->ei = ei;
6029         adapter->pba = ei->pba;
6030         adapter->flags = ei->flags;
6031         adapter->flags2 = ei->flags2;
6032         adapter->hw.adapter = adapter;
6033         adapter->hw.mac.type = ei->mac;
6034         adapter->max_hw_frame_size = ei->max_hw_frame_size;
6035         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
6036
6037         mmio_start = pci_resource_start(pdev, 0);
6038         mmio_len = pci_resource_len(pdev, 0);
6039
6040         err = -EIO;
6041         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6042         if (!adapter->hw.hw_addr)
6043                 goto err_ioremap;
6044
6045         if ((adapter->flags & FLAG_HAS_FLASH) &&
6046             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6047                 flash_start = pci_resource_start(pdev, 1);
6048                 flash_len = pci_resource_len(pdev, 1);
6049                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6050                 if (!adapter->hw.flash_address)
6051                         goto err_flashmap;
6052         }
6053
6054         /* construct the net_device struct */
6055         netdev->netdev_ops              = &e1000e_netdev_ops;
6056         e1000e_set_ethtool_ops(netdev);
6057         netdev->watchdog_timeo          = 5 * HZ;
6058         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
6059         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
6060
6061         netdev->mem_start = mmio_start;
6062         netdev->mem_end = mmio_start + mmio_len;
6063
6064         adapter->bd_number = cards_found++;
6065
6066         e1000e_check_options(adapter);
6067
6068         /* setup adapter struct */
6069         err = e1000_sw_init(adapter);
6070         if (err)
6071                 goto err_sw_init;
6072
6073         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6074         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6075         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6076
6077         err = ei->get_variants(adapter);
6078         if (err)
6079                 goto err_hw_init;
6080
6081         if ((adapter->flags & FLAG_IS_ICH) &&
6082             (adapter->flags & FLAG_READ_ONLY_NVM))
6083                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6084
6085         hw->mac.ops.get_bus_info(&adapter->hw);
6086
6087         adapter->hw.phy.autoneg_wait_to_complete = 0;
6088
6089         /* Copper options */
6090         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6091                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6092                 adapter->hw.phy.disable_polarity_correction = 0;
6093                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6094         }
6095
6096         if (e1000_check_reset_block(&adapter->hw))
6097                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
6098
6099         /* Set initial default active device features */
6100         netdev->features = (NETIF_F_SG |
6101                             NETIF_F_HW_VLAN_RX |
6102                             NETIF_F_HW_VLAN_TX |
6103                             NETIF_F_TSO |
6104                             NETIF_F_TSO6 |
6105                             NETIF_F_RXCSUM |
6106                             NETIF_F_HW_CSUM);
6107
6108         /* Set user-changeable features (subset of all device features) */
6109         netdev->hw_features = netdev->features;
6110
6111         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6112                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
6113
6114         netdev->vlan_features |= (NETIF_F_SG |
6115                                   NETIF_F_TSO |
6116                                   NETIF_F_TSO6 |
6117                                   NETIF_F_HW_CSUM);
6118
6119         netdev->priv_flags |= IFF_UNICAST_FLT;
6120
6121         if (pci_using_dac) {
6122                 netdev->features |= NETIF_F_HIGHDMA;
6123                 netdev->vlan_features |= NETIF_F_HIGHDMA;
6124         }
6125
6126         if (e1000e_enable_mng_pass_thru(&adapter->hw))
6127                 adapter->flags |= FLAG_MNG_PT_ENABLED;
6128
6129         /*
6130          * before reading the NVM, reset the controller to
6131          * put the device in a known good starting state
6132          */
6133         adapter->hw.mac.ops.reset_hw(&adapter->hw);
6134
6135         /*
6136          * systems with ASPM and others may see the checksum fail on the first
6137          * attempt. Let's give it a few tries
6138          */
6139         for (i = 0;; i++) {
6140                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6141                         break;
6142                 if (i == 2) {
6143                         e_err("The NVM Checksum Is Not Valid\n");
6144                         err = -EIO;
6145                         goto err_eeprom;
6146                 }
6147         }
6148
6149         e1000_eeprom_checks(adapter);
6150
6151         /* copy the MAC address */
6152         if (e1000e_read_mac_addr(&adapter->hw))
6153                 e_err("NVM Read Error while reading MAC address\n");
6154
6155         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6156         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
6157
6158         if (!is_valid_ether_addr(netdev->perm_addr)) {
6159                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
6160                 err = -EIO;
6161                 goto err_eeprom;
6162         }
6163
6164         init_timer(&adapter->watchdog_timer);
6165         adapter->watchdog_timer.function = e1000_watchdog;
6166         adapter->watchdog_timer.data = (unsigned long) adapter;
6167
6168         init_timer(&adapter->phy_info_timer);
6169         adapter->phy_info_timer.function = e1000_update_phy_info;
6170         adapter->phy_info_timer.data = (unsigned long) adapter;
6171
6172         INIT_WORK(&adapter->reset_task, e1000_reset_task);
6173         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6174         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6175         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6176         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6177
6178         /* Initialize link parameters. User can change them with ethtool */
6179         adapter->hw.mac.autoneg = 1;
6180         adapter->fc_autoneg = 1;
6181         adapter->hw.fc.requested_mode = e1000_fc_default;
6182         adapter->hw.fc.current_mode = e1000_fc_default;
6183         adapter->hw.phy.autoneg_advertised = 0x2f;
6184
6185         /* ring size defaults */
6186         adapter->rx_ring->count = 256;
6187         adapter->tx_ring->count = 256;
6188
6189         /*
6190          * Initial Wake on LAN setting - If APM wake is enabled in
6191          * the EEPROM, enable the ACPI Magic Packet filter
6192          */
6193         if (adapter->flags & FLAG_APME_IN_WUC) {
6194                 /* APME bit in EEPROM is mapped to WUC.APME */
6195                 eeprom_data = er32(WUC);
6196                 eeprom_apme_mask = E1000_WUC_APME;
6197                 if ((hw->mac.type > e1000_ich10lan) &&
6198                     (eeprom_data & E1000_WUC_PHY_WAKE))
6199                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6200         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6201                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6202                     (adapter->hw.bus.func == 1))
6203                         e1000_read_nvm(&adapter->hw,
6204                                 NVM_INIT_CONTROL3_PORT_B, 1, &eeprom_data);
6205                 else
6206                         e1000_read_nvm(&adapter->hw,
6207                                 NVM_INIT_CONTROL3_PORT_A, 1, &eeprom_data);
6208         }
6209
6210         /* fetch WoL from EEPROM */
6211         if (eeprom_data & eeprom_apme_mask)
6212                 adapter->eeprom_wol |= E1000_WUFC_MAG;
6213
6214         /*
6215          * now that we have the eeprom settings, apply the special cases
6216          * where the eeprom may be wrong or the board simply won't support
6217          * wake on lan on a particular port
6218          */
6219         if (!(adapter->flags & FLAG_HAS_WOL))
6220                 adapter->eeprom_wol = 0;
6221
6222         /* initialize the wol settings based on the eeprom settings */
6223         adapter->wol = adapter->eeprom_wol;
6224         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6225
6226         /* save off EEPROM version number */
6227         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6228
6229         /* reset the hardware with the new settings */
6230         e1000e_reset(adapter);
6231
6232         /*
6233          * If the controller has AMT, do not set DRV_LOAD until the interface
6234          * is up.  For all other cases, let the f/w know that the h/w is now
6235          * under the control of the driver.
6236          */
6237         if (!(adapter->flags & FLAG_HAS_AMT))
6238                 e1000e_get_hw_control(adapter);
6239
6240         strncpy(netdev->name, "eth%d", sizeof(netdev->name) - 1);
6241         err = register_netdev(netdev);
6242         if (err)
6243                 goto err_register;
6244
6245         /* carrier off reporting is important to ethtool even BEFORE open */
6246         netif_carrier_off(netdev);
6247
6248         e1000_print_device_info(adapter);
6249
6250         if (pci_dev_run_wake(pdev))
6251                 pm_runtime_put_noidle(&pdev->dev);
6252
6253         return 0;
6254
6255 err_register:
6256         if (!(adapter->flags & FLAG_HAS_AMT))
6257                 e1000e_release_hw_control(adapter);
6258 err_eeprom:
6259         if (!e1000_check_reset_block(&adapter->hw))
6260                 e1000_phy_hw_reset(&adapter->hw);
6261 err_hw_init:
6262         kfree(adapter->tx_ring);
6263         kfree(adapter->rx_ring);
6264 err_sw_init:
6265         if (adapter->hw.flash_address)
6266                 iounmap(adapter->hw.flash_address);
6267         e1000e_reset_interrupt_capability(adapter);
6268 err_flashmap:
6269         iounmap(adapter->hw.hw_addr);
6270 err_ioremap:
6271         free_netdev(netdev);
6272 err_alloc_etherdev:
6273         pci_release_selected_regions(pdev,
6274                                      pci_select_bars(pdev, IORESOURCE_MEM));
6275 err_pci_reg:
6276 err_dma:
6277         pci_disable_device(pdev);
6278         return err;
6279 }
6280
6281 /**
6282  * e1000_remove - Device Removal Routine
6283  * @pdev: PCI device information struct
6284  *
6285  * e1000_remove is called by the PCI subsystem to alert the driver
6286  * that it should release a PCI device.  The could be caused by a
6287  * Hot-Plug event, or because the driver is going to be removed from
6288  * memory.
6289  **/
6290 static void __devexit e1000_remove(struct pci_dev *pdev)
6291 {
6292         struct net_device *netdev = pci_get_drvdata(pdev);
6293         struct e1000_adapter *adapter = netdev_priv(netdev);
6294         bool down = test_bit(__E1000_DOWN, &adapter->state);
6295
6296         /*
6297          * The timers may be rescheduled, so explicitly disable them
6298          * from being rescheduled.
6299          */
6300         if (!down)
6301                 set_bit(__E1000_DOWN, &adapter->state);
6302         del_timer_sync(&adapter->watchdog_timer);
6303         del_timer_sync(&adapter->phy_info_timer);
6304
6305         cancel_work_sync(&adapter->reset_task);
6306         cancel_work_sync(&adapter->watchdog_task);
6307         cancel_work_sync(&adapter->downshift_task);
6308         cancel_work_sync(&adapter->update_phy_task);
6309         cancel_work_sync(&adapter->print_hang_task);
6310
6311         if (!(netdev->flags & IFF_UP))
6312                 e1000_power_down_phy(adapter);
6313
6314         /* Don't lie to e1000_close() down the road. */
6315         if (!down)
6316                 clear_bit(__E1000_DOWN, &adapter->state);
6317         unregister_netdev(netdev);
6318
6319         if (pci_dev_run_wake(pdev))
6320                 pm_runtime_get_noresume(&pdev->dev);
6321
6322         /*
6323          * Release control of h/w to f/w.  If f/w is AMT enabled, this
6324          * would have already happened in close and is redundant.
6325          */
6326         e1000e_release_hw_control(adapter);
6327
6328         e1000e_reset_interrupt_capability(adapter);
6329         kfree(adapter->tx_ring);
6330         kfree(adapter->rx_ring);
6331
6332         iounmap(adapter->hw.hw_addr);
6333         if (adapter->hw.flash_address)
6334                 iounmap(adapter->hw.flash_address);
6335         pci_release_selected_regions(pdev,
6336                                      pci_select_bars(pdev, IORESOURCE_MEM));
6337
6338         free_netdev(netdev);
6339
6340         /* AER disable */
6341         pci_disable_pcie_error_reporting(pdev);
6342
6343         pci_disable_device(pdev);
6344 }
6345
6346 /* PCI Error Recovery (ERS) */
6347 static struct pci_error_handlers e1000_err_handler = {
6348         .error_detected = e1000_io_error_detected,
6349         .slot_reset = e1000_io_slot_reset,
6350         .resume = e1000_io_resume,
6351 };
6352
6353 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6354         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6355         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6356         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6357         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
6358         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6359         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6360         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6361         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6362         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6363
6364         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6365         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6366         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6367         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6368
6369         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6370         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6371         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6372
6373         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6374         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6375         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6376
6377         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6378           board_80003es2lan },
6379         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6380           board_80003es2lan },
6381         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6382           board_80003es2lan },
6383         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6384           board_80003es2lan },
6385
6386         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6387         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6388         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6389         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6390         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6391         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6392         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6393         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6394
6395         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6396         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6397         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6398         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6399         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6400         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6401         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6402         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6403         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6404
6405         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6406         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6407         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6408
6409         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6410         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6411         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6412
6413         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6414         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6415         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
6416         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
6417
6418         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
6419         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
6420
6421         { }     /* terminate list */
6422 };
6423 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
6424
6425 #ifdef CONFIG_PM
6426 static const struct dev_pm_ops e1000_pm_ops = {
6427         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
6428         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
6429                                 e1000_runtime_resume, e1000_idle)
6430 };
6431 #endif
6432
6433 /* PCI Device API Driver */
6434 static struct pci_driver e1000_driver = {
6435         .name     = e1000e_driver_name,
6436         .id_table = e1000_pci_tbl,
6437         .probe    = e1000_probe,
6438         .remove   = __devexit_p(e1000_remove),
6439 #ifdef CONFIG_PM
6440         .driver.pm = &e1000_pm_ops,
6441 #endif
6442         .shutdown = e1000_shutdown,
6443         .err_handler = &e1000_err_handler
6444 };
6445
6446 /**
6447  * e1000_init_module - Driver Registration Routine
6448  *
6449  * e1000_init_module is the first routine called when the driver is
6450  * loaded. All it does is register with the PCI subsystem.
6451  **/
6452 static int __init e1000_init_module(void)
6453 {
6454         int ret;
6455         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
6456                 e1000e_driver_version);
6457         pr_info("Copyright(c) 1999 - 2011 Intel Corporation.\n");
6458         ret = pci_register_driver(&e1000_driver);
6459
6460         return ret;
6461 }
6462 module_init(e1000_init_module);
6463
6464 /**
6465  * e1000_exit_module - Driver Exit Cleanup Routine
6466  *
6467  * e1000_exit_module is called just before the driver is removed
6468  * from memory.
6469  **/
6470 static void __exit e1000_exit_module(void)
6471 {
6472         pci_unregister_driver(&e1000_driver);
6473 }
6474 module_exit(e1000_exit_module);
6475
6476
6477 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
6478 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
6479 MODULE_LICENSE("GPL");
6480 MODULE_VERSION(DRV_VERSION);
6481
6482 /* e1000_main.c */