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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2012 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/pagemap.h>
  37 #include <linux/delay.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/tcp.h>
  41 #include <linux/ipv6.h>
  42 #include <linux/slab.h>
  43 #include <net/checksum.h>
  44 #include <net/ip6_checksum.h>
  45 #include <linux/mii.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/if_vlan.h>
  48 #include <linux/cpu.h>
  49 #include <linux/smp.h>
  50 #include <linux/pm_qos.h>
  51 #include <linux/pm_runtime.h>
  52 #include <linux/aer.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "e1000.h"
  56
  57 #define DRV_EXTRAVERSION "-k"
  58
  59 #define DRV_VERSION "1.9.5" 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         {0, NULL}
 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                 __le64 a;
 187                 __le64 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                 __le64 a;
 195                 __le64 b;
 196                 __le64 c;
 197                 __le64 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                 return;
 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                 return;
 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
 454 /**
 455  * e1000_desc_unused - calculate if we have unused descriptors
 456  **/
 457 static int e1000_desc_unused(struct e1000_ring *ring)
 458 {
 459         if (ring->next_to_clean > ring->next_to_use)
 460                 return ring->next_to_clean - ring->next_to_use - 1;
 461
 462         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 463 }
 464
 465 /**
 466  * e1000_receive_skb - helper function to handle Rx indications
 467  * @adapter: board private structure
 468  * @status: descriptor status field as written by hardware
 469  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 470  * @skb: pointer to sk_buff to be indicated to stack
 471  **/
 472 static void e1000_receive_skb(struct e1000_adapter *adapter,
 473                               struct net_device *netdev, struct sk_buff *skb,
 474                               u8 status, __le16 vlan)
 475 {
 476         u16 tag = le16_to_cpu(vlan);
 477         skb->protocol = eth_type_trans(skb, netdev);
 478
 479         if (status & E1000_RXD_STAT_VP)
 480                 __vlan_hwaccel_put_tag(skb, tag);
 481
 482         napi_gro_receive(&adapter->napi, skb);
 483 }
 484
 485 /**
 486  * e1000_rx_checksum - Receive Checksum Offload
 487  * @adapter: board private structure
 488  * @status_err: receive descriptor status and error fields
 489  * @csum: receive descriptor csum field
 490  * @sk_buff: socket buffer with received data
 491  **/
 492 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 493                               __le16 csum, struct sk_buff *skb)
 494 {
 495         u16 status = (u16)status_err;
 496         u8 errors = (u8)(status_err >> 24);
 497
 498         skb_checksum_none_assert(skb);
 499
 500         /* Rx checksum disabled */
 501         if (!(adapter->netdev->features & NETIF_F_RXCSUM))
 502                 return;
 503
 504         /* Ignore Checksum bit is set */
 505         if (status & E1000_RXD_STAT_IXSM)
 506                 return;
 507
 508         /* TCP/UDP checksum error bit is set */
 509         if (errors & E1000_RXD_ERR_TCPE) {
 510                 /* let the stack verify checksum errors */
 511                 adapter->hw_csum_err++;
 512                 return;
 513         }
 514
 515         /* TCP/UDP Checksum has not been calculated */
 516         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 517                 return;
 518
 519         /* It must be a TCP or UDP packet with a valid checksum */
 520         if (status & E1000_RXD_STAT_TCPCS) {
 521                 /* TCP checksum is good */
 522                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 523         } else {
 524                 /*
 525                  * IP fragment with UDP payload
 526                  * Hardware complements the payload checksum, so we undo it
 527                  * and then put the value in host order for further stack use.
 528                  */
 529                 __sum16 sum = (__force __sum16)swab16((__force u16)csum);
 530                 skb->csum = csum_unfold(~sum);
 531                 skb->ip_summed = CHECKSUM_COMPLETE;
 532         }
 533         adapter->hw_csum_good++;
 534 }
 535
 536 /**
 537  * e1000e_update_tail_wa - helper function for e1000e_update_[rt]dt_wa()
 538  * @hw: pointer to the HW structure
 539  * @tail: address of tail descriptor register
 540  * @i: value to write to tail descriptor register
 541  *
 542  * When updating the tail register, the ME could be accessing Host CSR
 543  * registers at the same time.  Normally, this is handled in h/w by an
 544  * arbiter but on some parts there is a bug that acknowledges Host accesses
 545  * later than it should which could result in the descriptor register to
 546  * have an incorrect value.  Workaround this by checking the FWSM register
 547  * which has bit 24 set while ME is accessing Host CSR registers, wait
 548  * if it is set and try again a number of times.
 549  **/
 550 static inline s32 e1000e_update_tail_wa(struct e1000_hw *hw, void __iomem *tail,
 551                                         unsigned int i)
 552 {
 553         unsigned int j = 0;
 554
 555         while ((j++ < E1000_ICH_FWSM_PCIM2PCI_COUNT) &&
 556                (er32(FWSM) & E1000_ICH_FWSM_PCIM2PCI))
 557                 udelay(50);
 558
 559         writel(i, tail);
 560
 561         if ((j == E1000_ICH_FWSM_PCIM2PCI_COUNT) && (i != readl(tail)))
 562                 return E1000_ERR_SWFW_SYNC;
 563
 564         return 0;
 565 }
 566
 567 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
 568 {
 569         struct e1000_adapter *adapter = rx_ring->adapter;
 570         struct e1000_hw *hw = &adapter->hw;
 571
 572         if (e1000e_update_tail_wa(hw, rx_ring->tail, i)) {
 573                 u32 rctl = er32(RCTL);
 574                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
 575                 e_err("ME firmware caused invalid RDT - resetting\n");
 576                 schedule_work(&adapter->reset_task);
 577         }
 578 }
 579
 580 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
 581 {
 582         struct e1000_adapter *adapter = tx_ring->adapter;
 583         struct e1000_hw *hw = &adapter->hw;
 584
 585         if (e1000e_update_tail_wa(hw, tx_ring->tail, i)) {
 586                 u32 tctl = er32(TCTL);
 587                 ew32(TCTL, tctl & ~E1000_TCTL_EN);
 588                 e_err("ME firmware caused invalid TDT - resetting\n");
 589                 schedule_work(&adapter->reset_task);
 590         }
 591 }
 592
 593 /**
 594  * e1000_alloc_rx_buffers - Replace used receive buffers
 595  * @rx_ring: Rx descriptor ring
 596  **/
 597 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
 598                                    int cleaned_count, gfp_t gfp)
 599 {
 600         struct e1000_adapter *adapter = rx_ring->adapter;
 601         struct net_device *netdev = adapter->netdev;
 602         struct pci_dev *pdev = adapter->pdev;
 603         union e1000_rx_desc_extended *rx_desc;
 604         struct e1000_buffer *buffer_info;
 605         struct sk_buff *skb;
 606         unsigned int i;
 607         unsigned int bufsz = adapter->rx_buffer_len;
 608
 609         i = rx_ring->next_to_use;
 610         buffer_info = &rx_ring->buffer_info[i];
 611
 612         while (cleaned_count--) {
 613                 skb = buffer_info->skb;
 614                 if (skb) {
 615                         skb_trim(skb, 0);
 616                         goto map_skb;
 617                 }
 618
 619                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 620                 if (!skb) {
 621                         /* Better luck next round */
 622                         adapter->alloc_rx_buff_failed++;
 623                         break;
 624                 }
 625
 626                 buffer_info->skb = skb;
 627 map_skb:
 628                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 629                                                   adapter->rx_buffer_len,
 630                                                   DMA_FROM_DEVICE);
 631                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 632                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 633                         adapter->rx_dma_failed++;
 634                         break;
 635                 }
 636
 637                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 638                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 639
 640                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 641                         /*
 642                          * Force memory writes to complete before letting h/w
 643                          * know there are new descriptors to fetch.  (Only
 644                          * applicable for weak-ordered memory model archs,
 645                          * such as IA-64).
 646                          */
 647                         wmb();
 648                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 649                                 e1000e_update_rdt_wa(rx_ring, i);
 650                         else
 651                                 writel(i, rx_ring->tail);
 652                 }
 653                 i++;
 654                 if (i == rx_ring->count)
 655                         i = 0;
 656                 buffer_info = &rx_ring->buffer_info[i];
 657         }
 658
 659         rx_ring->next_to_use = i;
 660 }
 661
 662 /**
 663  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 664  * @rx_ring: Rx descriptor ring
 665  **/
 666 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
 667                                       int cleaned_count, gfp_t gfp)
 668 {
 669         struct e1000_adapter *adapter = rx_ring->adapter;
 670         struct net_device *netdev = adapter->netdev;
 671         struct pci_dev *pdev = adapter->pdev;
 672         union e1000_rx_desc_packet_split *rx_desc;
 673         struct e1000_buffer *buffer_info;
 674         struct e1000_ps_page *ps_page;
 675         struct sk_buff *skb;
 676         unsigned int i, j;
 677
 678         i = rx_ring->next_to_use;
 679         buffer_info = &rx_ring->buffer_info[i];
 680
 681         while (cleaned_count--) {
 682                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 683
 684                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 685                         ps_page = &buffer_info->ps_pages[j];
 686                         if (j >= adapter->rx_ps_pages) {
 687                                 /* all unused desc entries get hw null ptr */
 688                                 rx_desc->read.buffer_addr[j + 1] =
 689                                     ~cpu_to_le64(0);
 690                                 continue;
 691                         }
 692                         if (!ps_page->page) {
 693                                 ps_page->page = alloc_page(gfp);
 694                                 if (!ps_page->page) {
 695                                         adapter->alloc_rx_buff_failed++;
 696                                         goto no_buffers;
 697                                 }
 698                                 ps_page->dma = dma_map_page(&pdev->dev,
 699                                                             ps_page->page,
 700                                                             0, PAGE_SIZE,
 701                                                             DMA_FROM_DEVICE);
 702                                 if (dma_mapping_error(&pdev->dev,
 703                                                       ps_page->dma)) {
 704                                         dev_err(&adapter->pdev->dev,
 705                                                 "Rx DMA page map failed\n");
 706                                         adapter->rx_dma_failed++;
 707                                         goto no_buffers;
 708                                 }
 709                         }
 710                         /*
 711                          * Refresh the desc even if buffer_addrs
 712                          * didn't change because each write-back
 713                          * erases this info.
 714                          */
 715                         rx_desc->read.buffer_addr[j + 1] =
 716                             cpu_to_le64(ps_page->dma);
 717                 }
 718
 719                 skb = __netdev_alloc_skb_ip_align(netdev,
 720                                                   adapter->rx_ps_bsize0,
 721                                                   gfp);
 722
 723                 if (!skb) {
 724                         adapter->alloc_rx_buff_failed++;
 725                         break;
 726                 }
 727
 728                 buffer_info->skb = skb;
 729                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 730                                                   adapter->rx_ps_bsize0,
 731                                                   DMA_FROM_DEVICE);
 732                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 733                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 734                         adapter->rx_dma_failed++;
 735                         /* cleanup skb */
 736                         dev_kfree_skb_any(skb);
 737                         buffer_info->skb = NULL;
 738                         break;
 739                 }
 740
 741                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 742
 743                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 744                         /*
 745                          * Force memory writes to complete before letting h/w
 746                          * know there are new descriptors to fetch.  (Only
 747                          * applicable for weak-ordered memory model archs,
 748                          * such as IA-64).
 749                          */
 750                         wmb();
 751                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 752                                 e1000e_update_rdt_wa(rx_ring, i << 1);
 753                         else
 754                                 writel(i << 1, rx_ring->tail);
 755                 }
 756
 757                 i++;
 758                 if (i == rx_ring->count)
 759                         i = 0;
 760                 buffer_info = &rx_ring->buffer_info[i];
 761         }
 762
 763 no_buffers:
 764         rx_ring->next_to_use = i;
 765 }
 766
 767 /**
 768  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 769  * @rx_ring: Rx descriptor ring
 770  * @cleaned_count: number of buffers to allocate this pass
 771  **/
 772
 773 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
 774                                          int cleaned_count, gfp_t gfp)
 775 {
 776         struct e1000_adapter *adapter = rx_ring->adapter;
 777         struct net_device *netdev = adapter->netdev;
 778         struct pci_dev *pdev = adapter->pdev;
 779         union e1000_rx_desc_extended *rx_desc;
 780         struct e1000_buffer *buffer_info;
 781         struct sk_buff *skb;
 782         unsigned int i;
 783         unsigned int bufsz = 256 - 16 /* for skb_reserve */;
 784
 785         i = rx_ring->next_to_use;
 786         buffer_info = &rx_ring->buffer_info[i];
 787
 788         while (cleaned_count--) {
 789                 skb = buffer_info->skb;
 790                 if (skb) {
 791                         skb_trim(skb, 0);
 792                         goto check_page;
 793                 }
 794
 795                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 796                 if (unlikely(!skb)) {
 797                         /* Better luck next round */
 798                         adapter->alloc_rx_buff_failed++;
 799                         break;
 800                 }
 801
 802                 buffer_info->skb = skb;
 803 check_page:
 804                 /* allocate a new page if necessary */
 805                 if (!buffer_info->page) {
 806                         buffer_info->page = alloc_page(gfp);
 807                         if (unlikely(!buffer_info->page)) {
 808                                 adapter->alloc_rx_buff_failed++;
 809                                 break;
 810                         }
 811                 }
 812
 813                 if (!buffer_info->dma)
 814                         buffer_info->dma = dma_map_page(&pdev->dev,
 815                                                         buffer_info->page, 0,
 816                                                         PAGE_SIZE,
 817                                                         DMA_FROM_DEVICE);
 818
 819                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 820                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 821
 822                 if (unlikely(++i == rx_ring->count))
 823                         i = 0;
 824                 buffer_info = &rx_ring->buffer_info[i];
 825         }
 826
 827         if (likely(rx_ring->next_to_use != i)) {
 828                 rx_ring->next_to_use = i;
 829                 if (unlikely(i-- == 0))
 830                         i = (rx_ring->count - 1);
 831
 832                 /* Force memory writes to complete before letting h/w
 833                  * know there are new descriptors to fetch.  (Only
 834                  * applicable for weak-ordered memory model archs,
 835                  * such as IA-64). */
 836                 wmb();
 837                 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 838                         e1000e_update_rdt_wa(rx_ring, i);
 839                 else
 840                         writel(i, rx_ring->tail);
 841         }
 842 }
 843
 844 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
 845                                  struct sk_buff *skb)
 846 {
 847         if (netdev->features & NETIF_F_RXHASH)
 848                 skb->rxhash = le32_to_cpu(rss);
 849 }
 850
 851 /**
 852  * e1000_clean_rx_irq - Send received data up the network stack
 853  * @rx_ring: Rx descriptor ring
 854  *
 855  * the return value indicates whether actual cleaning was done, there
 856  * is no guarantee that everything was cleaned
 857  **/
 858 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
 859                                int work_to_do)
 860 {
 861         struct e1000_adapter *adapter = rx_ring->adapter;
 862         struct net_device *netdev = adapter->netdev;
 863         struct pci_dev *pdev = adapter->pdev;
 864         struct e1000_hw *hw = &adapter->hw;
 865         union e1000_rx_desc_extended *rx_desc, *next_rxd;
 866         struct e1000_buffer *buffer_info, *next_buffer;
 867         u32 length, staterr;
 868         unsigned int i;
 869         int cleaned_count = 0;
 870         bool cleaned = false;
 871         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 872
 873         i = rx_ring->next_to_clean;
 874         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 875         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 876         buffer_info = &rx_ring->buffer_info[i];
 877
 878         while (staterr & E1000_RXD_STAT_DD) {
 879                 struct sk_buff *skb;
 880
 881                 if (*work_done >= work_to_do)
 882                         break;
 883                 (*work_done)++;
 884                 rmb();  /* read descriptor and rx_buffer_info after status DD */
 885
 886                 skb = buffer_info->skb;
 887                 buffer_info->skb = NULL;
 888
 889                 prefetch(skb->data - NET_IP_ALIGN);
 890
 891                 i++;
 892                 if (i == rx_ring->count)
 893                         i = 0;
 894                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
 895                 prefetch(next_rxd);
 896
 897                 next_buffer = &rx_ring->buffer_info[i];
 898
 899                 cleaned = true;
 900                 cleaned_count++;
 901                 dma_unmap_single(&pdev->dev,
 902                                  buffer_info->dma,
 903                                  adapter->rx_buffer_len,
 904                                  DMA_FROM_DEVICE);
 905                 buffer_info->dma = 0;
 906
 907                 length = le16_to_cpu(rx_desc->wb.upper.length);
 908
 909                 /*
 910                  * !EOP means multiple descriptors were used to store a single
 911                  * packet, if that's the case we need to toss it.  In fact, we
 912                  * need to toss every packet with the EOP bit clear and the
 913                  * next frame that _does_ have the EOP bit set, as it is by
 914                  * definition only a frame fragment
 915                  */
 916                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
 917                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 918
 919                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 920                         /* All receives must fit into a single buffer */
 921                         e_dbg("Receive packet consumed multiple buffers\n");
 922                         /* recycle */
 923                         buffer_info->skb = skb;
 924                         if (staterr & E1000_RXD_STAT_EOP)
 925                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 926                         goto next_desc;
 927                 }
 928
 929                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
 930                              !(netdev->features & NETIF_F_RXALL))) {
 931                         /* recycle */
 932                         buffer_info->skb = skb;
 933                         goto next_desc;
 934                 }
 935
 936                 /* adjust length to remove Ethernet CRC */
 937                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
 938                         /* If configured to store CRC, don't subtract FCS,
 939                          * but keep the FCS bytes out of the total_rx_bytes
 940                          * counter
 941                          */
 942                         if (netdev->features & NETIF_F_RXFCS)
 943                                 total_rx_bytes -= 4;
 944                         else
 945                                 length -= 4;
 946                 }
 947
 948                 total_rx_bytes += length;
 949                 total_rx_packets++;
 950
 951                 /*
 952                  * code added for copybreak, this should improve
 953                  * performance for small packets with large amounts
 954                  * of reassembly being done in the stack
 955                  */
 956                 if (length < copybreak) {
 957                         struct sk_buff *new_skb =
 958                             netdev_alloc_skb_ip_align(netdev, length);
 959                         if (new_skb) {
 960                                 skb_copy_to_linear_data_offset(new_skb,
 961                                                                -NET_IP_ALIGN,
 962                                                                (skb->data -
 963                                                                 NET_IP_ALIGN),
 964                                                                (length +
 965                                                                 NET_IP_ALIGN));
 966                                 /* save the skb in buffer_info as good */
 967                                 buffer_info->skb = skb;
 968                                 skb = new_skb;
 969                         }
 970                         /* else just continue with the old one */
 971                 }
 972                 /* end copybreak code */
 973                 skb_put(skb, length);
 974
 975                 /* Receive Checksum Offload */
 976                 e1000_rx_checksum(adapter, staterr,
 977                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
 978
 979                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
 980
 981                 e1000_receive_skb(adapter, netdev, skb, staterr,
 982                                   rx_desc->wb.upper.vlan);
 983
 984 next_desc:
 985                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
 986
 987                 /* return some buffers to hardware, one at a time is too slow */
 988                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
 989                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
 990                                               GFP_ATOMIC);
 991                         cleaned_count = 0;
 992                 }
 993
 994                 /* use prefetched values */
 995                 rx_desc = next_rxd;
 996                 buffer_info = next_buffer;
 997
 998                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 999         }
1000         rx_ring->next_to_clean = i;
1001
1002         cleaned_count = e1000_desc_unused(rx_ring);
1003         if (cleaned_count)
1004                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1005
1006         adapter->total_rx_bytes += total_rx_bytes;
1007         adapter->total_rx_packets += total_rx_packets;
1008         return cleaned;
1009 }
1010
1011 static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1012                             struct e1000_buffer *buffer_info)
1013 {
1014         struct e1000_adapter *adapter = tx_ring->adapter;
1015
1016         if (buffer_info->dma) {
1017                 if (buffer_info->mapped_as_page)
1018                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1019                                        buffer_info->length, DMA_TO_DEVICE);
1020                 else
1021                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1022                                          buffer_info->length, DMA_TO_DEVICE);
1023                 buffer_info->dma = 0;
1024         }
1025         if (buffer_info->skb) {
1026                 dev_kfree_skb_any(buffer_info->skb);
1027                 buffer_info->skb = NULL;
1028         }
1029         buffer_info->time_stamp = 0;
1030 }
1031
1032 static void e1000_print_hw_hang(struct work_struct *work)
1033 {
1034         struct e1000_adapter *adapter = container_of(work,
1035                                                      struct e1000_adapter,
1036                                                      print_hang_task);
1037         struct net_device *netdev = adapter->netdev;
1038         struct e1000_ring *tx_ring = adapter->tx_ring;
1039         unsigned int i = tx_ring->next_to_clean;
1040         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1041         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1042         struct e1000_hw *hw = &adapter->hw;
1043         u16 phy_status, phy_1000t_status, phy_ext_status;
1044         u16 pci_status;
1045
1046         if (test_bit(__E1000_DOWN, &adapter->state))
1047                 return;
1048
1049         if (!adapter->tx_hang_recheck &&
1050             (adapter->flags2 & FLAG2_DMA_BURST)) {
1051                 /* May be block on write-back, flush and detect again
1052                  * flush pending descriptor writebacks to memory
1053                  */
1054                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1055                 /* execute the writes immediately */
1056                 e1e_flush();
1057                 adapter->tx_hang_recheck = true;
1058                 return;
1059         }
1060         /* Real hang detected */
1061         adapter->tx_hang_recheck = false;
1062         netif_stop_queue(netdev);
1063
1064         e1e_rphy(hw, PHY_STATUS, &phy_status);
1065         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
1066         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
1067
1068         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1069
1070         /* detected Hardware unit hang */
1071         e_err("Detected Hardware Unit Hang:\n"
1072               "  TDH                  <%x>\n"
1073               "  TDT                  <%x>\n"
1074               "  next_to_use          <%x>\n"
1075               "  next_to_clean        <%x>\n"
1076               "buffer_info[next_to_clean]:\n"
1077               "  time_stamp           <%lx>\n"
1078               "  next_to_watch        <%x>\n"
1079               "  jiffies              <%lx>\n"
1080               "  next_to_watch.status <%x>\n"
1081               "MAC Status             <%x>\n"
1082               "PHY Status             <%x>\n"
1083               "PHY 1000BASE-T Status  <%x>\n"
1084               "PHY Extended Status    <%x>\n"
1085               "PCI Status             <%x>\n",
1086               readl(tx_ring->head),
1087               readl(tx_ring->tail),
1088               tx_ring->next_to_use,
1089               tx_ring->next_to_clean,
1090               tx_ring->buffer_info[eop].time_stamp,
1091               eop,
1092               jiffies,
1093               eop_desc->upper.fields.status,
1094               er32(STATUS),
1095               phy_status,
1096               phy_1000t_status,
1097               phy_ext_status,
1098               pci_status);
1099 }
1100
1101 /**
1102  * e1000_clean_tx_irq - Reclaim resources after transmit completes
1103  * @tx_ring: Tx descriptor ring
1104  *
1105  * the return value indicates whether actual cleaning was done, there
1106  * is no guarantee that everything was cleaned
1107  **/
1108 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
1109 {
1110         struct e1000_adapter *adapter = tx_ring->adapter;
1111         struct net_device *netdev = adapter->netdev;
1112         struct e1000_hw *hw = &adapter->hw;
1113         struct e1000_tx_desc *tx_desc, *eop_desc;
1114         struct e1000_buffer *buffer_info;
1115         unsigned int i, eop;
1116         unsigned int count = 0;
1117         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1118         unsigned int bytes_compl = 0, pkts_compl = 0;
1119
1120         i = tx_ring->next_to_clean;
1121         eop = tx_ring->buffer_info[i].next_to_watch;
1122         eop_desc = E1000_TX_DESC(*tx_ring, eop);
1123
1124         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1125                (count < tx_ring->count)) {
1126                 bool cleaned = false;
1127                 rmb(); /* read buffer_info after eop_desc */
1128                 for (; !cleaned; count++) {
1129                         tx_desc = E1000_TX_DESC(*tx_ring, i);
1130                         buffer_info = &tx_ring->buffer_info[i];
1131                         cleaned = (i == eop);
1132
1133                         if (cleaned) {
1134                                 total_tx_packets += buffer_info->segs;
1135                                 total_tx_bytes += buffer_info->bytecount;
1136                                 if (buffer_info->skb) {
1137                                         bytes_compl += buffer_info->skb->len;
1138                                         pkts_compl++;
1139                                 }
1140                         }
1141
1142                         e1000_put_txbuf(tx_ring, buffer_info);
1143                         tx_desc->upper.data = 0;
1144
1145                         i++;
1146                         if (i == tx_ring->count)
1147                                 i = 0;
1148                 }
1149
1150                 if (i == tx_ring->next_to_use)
1151                         break;
1152                 eop = tx_ring->buffer_info[i].next_to_watch;
1153                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1154         }
1155
1156         tx_ring->next_to_clean = i;
1157
1158         netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1159
1160 #define TX_WAKE_THRESHOLD 32
1161         if (count && netif_carrier_ok(netdev) &&
1162             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1163                 /* Make sure that anybody stopping the queue after this
1164                  * sees the new next_to_clean.
1165                  */
1166                 smp_mb();
1167
1168                 if (netif_queue_stopped(netdev) &&
1169                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1170                         netif_wake_queue(netdev);
1171                         ++adapter->restart_queue;
1172                 }
1173         }
1174
1175         if (adapter->detect_tx_hung) {
1176                 /*
1177                  * Detect a transmit hang in hardware, this serializes the
1178                  * check with the clearing of time_stamp and movement of i
1179                  */
1180                 adapter->detect_tx_hung = false;
1181                 if (tx_ring->buffer_info[i].time_stamp &&
1182                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1183                                + (adapter->tx_timeout_factor * HZ)) &&
1184                     !(er32(STATUS) & E1000_STATUS_TXOFF))
1185                         schedule_work(&adapter->print_hang_task);
1186                 else
1187                         adapter->tx_hang_recheck = false;
1188         }
1189         adapter->total_tx_bytes += total_tx_bytes;
1190         adapter->total_tx_packets += total_tx_packets;
1191         return count < tx_ring->count;
1192 }
1193
1194 /**
1195  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1196  * @rx_ring: Rx descriptor ring
1197  *
1198  * the return value indicates whether actual cleaning was done, there
1199  * is no guarantee that everything was cleaned
1200  **/
1201 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1202                                   int work_to_do)
1203 {
1204         struct e1000_adapter *adapter = rx_ring->adapter;
1205         struct e1000_hw *hw = &adapter->hw;
1206         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1207         struct net_device *netdev = adapter->netdev;
1208         struct pci_dev *pdev = adapter->pdev;
1209         struct e1000_buffer *buffer_info, *next_buffer;
1210         struct e1000_ps_page *ps_page;
1211         struct sk_buff *skb;
1212         unsigned int i, j;
1213         u32 length, staterr;
1214         int cleaned_count = 0;
1215         bool cleaned = false;
1216         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1217
1218         i = rx_ring->next_to_clean;
1219         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1220         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1221         buffer_info = &rx_ring->buffer_info[i];
1222
1223         while (staterr & E1000_RXD_STAT_DD) {
1224                 if (*work_done >= work_to_do)
1225                         break;
1226                 (*work_done)++;
1227                 skb = buffer_info->skb;
1228                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1229
1230                 /* in the packet split case this is header only */
1231                 prefetch(skb->data - NET_IP_ALIGN);
1232
1233                 i++;
1234                 if (i == rx_ring->count)
1235                         i = 0;
1236                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1237                 prefetch(next_rxd);
1238
1239                 next_buffer = &rx_ring->buffer_info[i];
1240
1241                 cleaned = true;
1242                 cleaned_count++;
1243                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1244                                  adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1245                 buffer_info->dma = 0;
1246
1247                 /* see !EOP comment in other Rx routine */
1248                 if (!(staterr & E1000_RXD_STAT_EOP))
1249                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1250
1251                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1252                         e_dbg("Packet Split buffers didn't pick up the full packet\n");
1253                         dev_kfree_skb_irq(skb);
1254                         if (staterr & E1000_RXD_STAT_EOP)
1255                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1256                         goto next_desc;
1257                 }
1258
1259                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1260                              !(netdev->features & NETIF_F_RXALL))) {
1261                         dev_kfree_skb_irq(skb);
1262                         goto next_desc;
1263                 }
1264
1265                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1266
1267                 if (!length) {
1268                         e_dbg("Last part of the packet spanning multiple descriptors\n");
1269                         dev_kfree_skb_irq(skb);
1270                         goto next_desc;
1271                 }
1272
1273                 /* Good Receive */
1274                 skb_put(skb, length);
1275
1276                 {
1277                         /*
1278                          * this looks ugly, but it seems compiler issues make
1279                          * it more efficient than reusing j
1280                          */
1281                         int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1282
1283                         /*
1284                          * page alloc/put takes too long and effects small
1285                          * packet throughput, so unsplit small packets and
1286                          * save the alloc/put only valid in softirq (napi)
1287                          * context to call kmap_*
1288                          */
1289                         if (l1 && (l1 <= copybreak) &&
1290                             ((length + l1) <= adapter->rx_ps_bsize0)) {
1291                                 u8 *vaddr;
1292
1293                                 ps_page = &buffer_info->ps_pages[0];
1294
1295                                 /*
1296                                  * there is no documentation about how to call
1297                                  * kmap_atomic, so we can't hold the mapping
1298                                  * very long
1299                                  */
1300                                 dma_sync_single_for_cpu(&pdev->dev,
1301                                                         ps_page->dma,
1302                                                         PAGE_SIZE,
1303                                                         DMA_FROM_DEVICE);
1304                                 vaddr = kmap_atomic(ps_page->page);
1305                                 memcpy(skb_tail_pointer(skb), vaddr, l1);
1306                                 kunmap_atomic(vaddr);
1307                                 dma_sync_single_for_device(&pdev->dev,
1308                                                            ps_page->dma,
1309                                                            PAGE_SIZE,
1310                                                            DMA_FROM_DEVICE);
1311
1312                                 /* remove the CRC */
1313                                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1314                                         if (!(netdev->features & NETIF_F_RXFCS))
1315                                                 l1 -= 4;
1316                                 }
1317
1318                                 skb_put(skb, l1);
1319                                 goto copydone;
1320                         } /* if */
1321                 }
1322
1323                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1324                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1325                         if (!length)
1326                                 break;
1327
1328                         ps_page = &buffer_info->ps_pages[j];
1329                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1330                                        DMA_FROM_DEVICE);
1331                         ps_page->dma = 0;
1332                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1333                         ps_page->page = NULL;
1334                         skb->len += length;
1335                         skb->data_len += length;
1336                         skb->truesize += PAGE_SIZE;
1337                 }
1338
1339                 /* strip the ethernet crc, problem is we're using pages now so
1340                  * this whole operation can get a little cpu intensive
1341                  */
1342                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1343                         if (!(netdev->features & NETIF_F_RXFCS))
1344                                 pskb_trim(skb, skb->len - 4);
1345                 }
1346
1347 copydone:
1348                 total_rx_bytes += skb->len;
1349                 total_rx_packets++;
1350
1351                 e1000_rx_checksum(adapter, staterr,
1352                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
1353
1354                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1355
1356                 if (rx_desc->wb.upper.header_status &
1357                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1358                         adapter->rx_hdr_split++;
1359
1360                 e1000_receive_skb(adapter, netdev, skb,
1361                                   staterr, rx_desc->wb.middle.vlan);
1362
1363 next_desc:
1364                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1365                 buffer_info->skb = NULL;
1366
1367                 /* return some buffers to hardware, one at a time is too slow */
1368                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1369                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1370                                               GFP_ATOMIC);
1371                         cleaned_count = 0;
1372                 }
1373
1374                 /* use prefetched values */
1375                 rx_desc = next_rxd;
1376                 buffer_info = next_buffer;
1377
1378                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1379         }
1380         rx_ring->next_to_clean = i;
1381
1382         cleaned_count = e1000_desc_unused(rx_ring);
1383         if (cleaned_count)
1384                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1385
1386         adapter->total_rx_bytes += total_rx_bytes;
1387         adapter->total_rx_packets += total_rx_packets;
1388         return cleaned;
1389 }
1390
1391 /**
1392  * e1000_consume_page - helper function
1393  **/
1394 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1395                                u16 length)
1396 {
1397         bi->page = NULL;
1398         skb->len += length;
1399         skb->data_len += length;
1400         skb->truesize += PAGE_SIZE;
1401 }
1402
1403 /**
1404  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1405  * @adapter: board private structure
1406  *
1407  * the return value indicates whether actual cleaning was done, there
1408  * is no guarantee that everything was cleaned
1409  **/
1410 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1411                                      int work_to_do)
1412 {
1413         struct e1000_adapter *adapter = rx_ring->adapter;
1414         struct net_device *netdev = adapter->netdev;
1415         struct pci_dev *pdev = adapter->pdev;
1416         union e1000_rx_desc_extended *rx_desc, *next_rxd;
1417         struct e1000_buffer *buffer_info, *next_buffer;
1418         u32 length, staterr;
1419         unsigned int i;
1420         int cleaned_count = 0;
1421         bool cleaned = false;
1422         unsigned int total_rx_bytes=0, total_rx_packets=0;
1423
1424         i = rx_ring->next_to_clean;
1425         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1426         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1427         buffer_info = &rx_ring->buffer_info[i];
1428
1429         while (staterr & E1000_RXD_STAT_DD) {
1430                 struct sk_buff *skb;
1431
1432                 if (*work_done >= work_to_do)
1433                         break;
1434                 (*work_done)++;
1435                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1436
1437                 skb = buffer_info->skb;
1438                 buffer_info->skb = NULL;
1439
1440                 ++i;
1441                 if (i == rx_ring->count)
1442                         i = 0;
1443                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1444                 prefetch(next_rxd);
1445
1446                 next_buffer = &rx_ring->buffer_info[i];
1447
1448                 cleaned = true;
1449                 cleaned_count++;
1450                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1451                                DMA_FROM_DEVICE);
1452                 buffer_info->dma = 0;
1453
1454                 length = le16_to_cpu(rx_desc->wb.upper.length);
1455
1456                 /* errors is only valid for DD + EOP descriptors */
1457                 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1458                              ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1459                               !(netdev->features & NETIF_F_RXALL)))) {
1460                         /* recycle both page and skb */
1461                         buffer_info->skb = skb;
1462                         /* an error means any chain goes out the window too */
1463                         if (rx_ring->rx_skb_top)
1464                                 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1465                         rx_ring->rx_skb_top = NULL;
1466                         goto next_desc;
1467                 }
1468
1469 #define rxtop (rx_ring->rx_skb_top)
1470                 if (!(staterr & E1000_RXD_STAT_EOP)) {
1471                         /* this descriptor is only the beginning (or middle) */
1472                         if (!rxtop) {
1473                                 /* this is the beginning of a chain */
1474                                 rxtop = skb;
1475                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1476                                                    0, length);
1477                         } else {
1478                                 /* this is the middle of a chain */
1479                                 skb_fill_page_desc(rxtop,
1480                                     skb_shinfo(rxtop)->nr_frags,
1481                                     buffer_info->page, 0, length);
1482                                 /* re-use the skb, only consumed the page */
1483                                 buffer_info->skb = skb;
1484                         }
1485                         e1000_consume_page(buffer_info, rxtop, length);
1486                         goto next_desc;
1487                 } else {
1488                         if (rxtop) {
1489                                 /* end of the chain */
1490                                 skb_fill_page_desc(rxtop,
1491                                     skb_shinfo(rxtop)->nr_frags,
1492                                     buffer_info->page, 0, length);
1493                                 /* re-use the current skb, we only consumed the
1494                                  * page */
1495                                 buffer_info->skb = skb;
1496                                 skb = rxtop;
1497                                 rxtop = NULL;
1498                                 e1000_consume_page(buffer_info, skb, length);
1499                         } else {
1500                                 /* no chain, got EOP, this buf is the packet
1501                                  * copybreak to save the put_page/alloc_page */
1502                                 if (length <= copybreak &&
1503                                     skb_tailroom(skb) >= length) {
1504                                         u8 *vaddr;
1505                                         vaddr = kmap_atomic(buffer_info->page);
1506                                         memcpy(skb_tail_pointer(skb), vaddr,
1507                                                length);
1508                                         kunmap_atomic(vaddr);
1509                                         /* re-use the page, so don't erase
1510                                          * buffer_info->page */
1511                                         skb_put(skb, length);
1512                                 } else {
1513                                         skb_fill_page_desc(skb, 0,
1514                                                            buffer_info->page, 0,
1515                                                            length);
1516                                         e1000_consume_page(buffer_info, skb,
1517                                                            length);
1518                                 }
1519                         }
1520                 }
1521
1522                 /* Receive Checksum Offload XXX recompute due to CRC strip? */
1523                 e1000_rx_checksum(adapter, staterr,
1524                                   rx_desc->wb.lower.hi_dword.csum_ip.csum, skb);
1525
1526                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1527
1528                 /* probably a little skewed due to removing CRC */
1529                 total_rx_bytes += skb->len;
1530                 total_rx_packets++;
1531
1532                 /* eth type trans needs skb->data to point to something */
1533                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1534                         e_err("pskb_may_pull failed.\n");
1535                         dev_kfree_skb_irq(skb);
1536                         goto next_desc;
1537                 }
1538
1539                 e1000_receive_skb(adapter, netdev, skb, staterr,
1540                                   rx_desc->wb.upper.vlan);
1541
1542 next_desc:
1543                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1544
1545                 /* return some buffers to hardware, one at a time is too slow */
1546                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1547                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1548                                               GFP_ATOMIC);
1549                         cleaned_count = 0;
1550                 }
1551
1552                 /* use prefetched values */
1553                 rx_desc = next_rxd;
1554                 buffer_info = next_buffer;
1555
1556                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1557         }
1558         rx_ring->next_to_clean = i;
1559
1560         cleaned_count = e1000_desc_unused(rx_ring);
1561         if (cleaned_count)
1562                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1563
1564         adapter->total_rx_bytes += total_rx_bytes;
1565         adapter->total_rx_packets += total_rx_packets;
1566         return cleaned;
1567 }
1568
1569 /**
1570  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1571  * @rx_ring: Rx descriptor ring
1572  **/
1573 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
1574 {
1575         struct e1000_adapter *adapter = rx_ring->adapter;
1576         struct e1000_buffer *buffer_info;
1577         struct e1000_ps_page *ps_page;
1578         struct pci_dev *pdev = adapter->pdev;
1579         unsigned int i, j;
1580
1581         /* Free all the Rx ring sk_buffs */
1582         for (i = 0; i < rx_ring->count; i++) {
1583                 buffer_info = &rx_ring->buffer_info[i];
1584                 if (buffer_info->dma) {
1585                         if (adapter->clean_rx == e1000_clean_rx_irq)
1586                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1587                                                  adapter->rx_buffer_len,
1588                                                  DMA_FROM_DEVICE);
1589                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1590                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1591                                                PAGE_SIZE,
1592                                                DMA_FROM_DEVICE);
1593                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1594                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1595                                                  adapter->rx_ps_bsize0,
1596                                                  DMA_FROM_DEVICE);
1597                         buffer_info->dma = 0;
1598                 }
1599
1600                 if (buffer_info->page) {
1601                         put_page(buffer_info->page);
1602                         buffer_info->page = NULL;
1603                 }
1604
1605                 if (buffer_info->skb) {
1606                         dev_kfree_skb(buffer_info->skb);
1607                         buffer_info->skb = NULL;
1608                 }
1609
1610                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1611                         ps_page = &buffer_info->ps_pages[j];
1612                         if (!ps_page->page)
1613                                 break;
1614                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1615                                        DMA_FROM_DEVICE);
1616                         ps_page->dma = 0;
1617                         put_page(ps_page->page);
1618                         ps_page->page = NULL;
1619                 }
1620         }
1621
1622         /* there also may be some cached data from a chained receive */
1623         if (rx_ring->rx_skb_top) {
1624                 dev_kfree_skb(rx_ring->rx_skb_top);
1625                 rx_ring->rx_skb_top = NULL;
1626         }
1627
1628         /* Zero out the descriptor ring */
1629         memset(rx_ring->desc, 0, rx_ring->size);
1630
1631         rx_ring->next_to_clean = 0;
1632         rx_ring->next_to_use = 0;
1633         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1634
1635         writel(0, rx_ring->head);
1636         writel(0, rx_ring->tail);
1637 }
1638
1639 static void e1000e_downshift_workaround(struct work_struct *work)
1640 {
1641         struct e1000_adapter *adapter = container_of(work,
1642                                         struct e1000_adapter, downshift_task);
1643
1644         if (test_bit(__E1000_DOWN, &adapter->state))
1645                 return;
1646
1647         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1648 }
1649
1650 /**
1651  * e1000_intr_msi - Interrupt Handler
1652  * @irq: interrupt number
1653  * @data: pointer to a network interface device structure
1654  **/
1655 static irqreturn_t e1000_intr_msi(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 icr = er32(ICR);
1661
1662         /*
1663          * read ICR disables interrupts using IAM
1664          */
1665
1666         if (icr & E1000_ICR_LSC) {
1667                 hw->mac.get_link_status = true;
1668                 /*
1669                  * ICH8 workaround-- Call gig speed drop workaround on cable
1670                  * disconnect (LSC) before accessing any PHY registers
1671                  */
1672                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1673                     (!(er32(STATUS) & E1000_STATUS_LU)))
1674                         schedule_work(&adapter->downshift_task);
1675
1676                 /*
1677                  * 80003ES2LAN workaround-- For packet buffer work-around on
1678                  * link down event; disable receives here in the ISR and reset
1679                  * adapter in watchdog
1680                  */
1681                 if (netif_carrier_ok(netdev) &&
1682                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1683                         /* disable receives */
1684                         u32 rctl = er32(RCTL);
1685                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1686                         adapter->flags |= FLAG_RX_RESTART_NOW;
1687                 }
1688                 /* guard against interrupt when we're going down */
1689                 if (!test_bit(__E1000_DOWN, &adapter->state))
1690                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1691         }
1692
1693         if (napi_schedule_prep(&adapter->napi)) {
1694                 adapter->total_tx_bytes = 0;
1695                 adapter->total_tx_packets = 0;
1696                 adapter->total_rx_bytes = 0;
1697                 adapter->total_rx_packets = 0;
1698                 __napi_schedule(&adapter->napi);
1699         }
1700
1701         return IRQ_HANDLED;
1702 }
1703
1704 /**
1705  * e1000_intr - Interrupt Handler
1706  * @irq: interrupt number
1707  * @data: pointer to a network interface device structure
1708  **/
1709 static irqreturn_t e1000_intr(int irq, void *data)
1710 {
1711         struct net_device *netdev = data;
1712         struct e1000_adapter *adapter = netdev_priv(netdev);
1713         struct e1000_hw *hw = &adapter->hw;
1714         u32 rctl, icr = er32(ICR);
1715
1716         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1717                 return IRQ_NONE;  /* Not our interrupt */
1718
1719         /*
1720          * IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1721          * not set, then the adapter didn't send an interrupt
1722          */
1723         if (!(icr & E1000_ICR_INT_ASSERTED))
1724                 return IRQ_NONE;
1725
1726         /*
1727          * Interrupt Auto-Mask...upon reading ICR,
1728          * interrupts are masked.  No need for the
1729          * IMC write
1730          */
1731
1732         if (icr & E1000_ICR_LSC) {
1733                 hw->mac.get_link_status = true;
1734                 /*
1735                  * ICH8 workaround-- Call gig speed drop workaround on cable
1736                  * disconnect (LSC) before accessing any PHY registers
1737                  */
1738                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1739                     (!(er32(STATUS) & E1000_STATUS_LU)))
1740                         schedule_work(&adapter->downshift_task);
1741
1742                 /*
1743                  * 80003ES2LAN workaround--
1744                  * For packet buffer work-around on link down event;
1745                  * disable receives here in the ISR and
1746                  * reset adapter in watchdog
1747                  */
1748                 if (netif_carrier_ok(netdev) &&
1749                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1750                         /* disable receives */
1751                         rctl = er32(RCTL);
1752                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1753                         adapter->flags |= FLAG_RX_RESTART_NOW;
1754                 }
1755                 /* guard against interrupt when we're going down */
1756                 if (!test_bit(__E1000_DOWN, &adapter->state))
1757                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1758         }
1759
1760         if (napi_schedule_prep(&adapter->napi)) {
1761                 adapter->total_tx_bytes = 0;
1762                 adapter->total_tx_packets = 0;
1763                 adapter->total_rx_bytes = 0;
1764                 adapter->total_rx_packets = 0;
1765                 __napi_schedule(&adapter->napi);
1766         }
1767
1768         return IRQ_HANDLED;
1769 }
1770
1771 static irqreturn_t e1000_msix_other(int irq, void *data)
1772 {
1773         struct net_device *netdev = data;
1774         struct e1000_adapter *adapter = netdev_priv(netdev);
1775         struct e1000_hw *hw = &adapter->hw;
1776         u32 icr = er32(ICR);
1777
1778         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1779                 if (!test_bit(__E1000_DOWN, &adapter->state))
1780                         ew32(IMS, E1000_IMS_OTHER);
1781                 return IRQ_NONE;
1782         }
1783
1784         if (icr & adapter->eiac_mask)
1785                 ew32(ICS, (icr & adapter->eiac_mask));
1786
1787         if (icr & E1000_ICR_OTHER) {
1788                 if (!(icr & E1000_ICR_LSC))
1789                         goto no_link_interrupt;
1790                 hw->mac.get_link_status = true;
1791                 /* guard against interrupt when we're going down */
1792                 if (!test_bit(__E1000_DOWN, &adapter->state))
1793                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1794         }
1795
1796 no_link_interrupt:
1797         if (!test_bit(__E1000_DOWN, &adapter->state))
1798                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1799
1800         return IRQ_HANDLED;
1801 }
1802
1803
1804 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1805 {
1806         struct net_device *netdev = data;
1807         struct e1000_adapter *adapter = netdev_priv(netdev);
1808         struct e1000_hw *hw = &adapter->hw;
1809         struct e1000_ring *tx_ring = adapter->tx_ring;
1810
1811
1812         adapter->total_tx_bytes = 0;
1813         adapter->total_tx_packets = 0;
1814
1815         if (!e1000_clean_tx_irq(tx_ring))
1816                 /* Ring was not completely cleaned, so fire another interrupt */
1817                 ew32(ICS, tx_ring->ims_val);
1818
1819         return IRQ_HANDLED;
1820 }
1821
1822 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1823 {
1824         struct net_device *netdev = data;
1825         struct e1000_adapter *adapter = netdev_priv(netdev);
1826         struct e1000_ring *rx_ring = adapter->rx_ring;
1827
1828         /* Write the ITR value calculated at the end of the
1829          * previous interrupt.
1830          */
1831         if (rx_ring->set_itr) {
1832                 writel(1000000000 / (rx_ring->itr_val * 256),
1833                        rx_ring->itr_register);
1834                 rx_ring->set_itr = 0;
1835         }
1836
1837         if (napi_schedule_prep(&adapter->napi)) {
1838                 adapter->total_rx_bytes = 0;
1839                 adapter->total_rx_packets = 0;
1840                 __napi_schedule(&adapter->napi);
1841         }
1842         return IRQ_HANDLED;
1843 }
1844
1845 /**
1846  * e1000_configure_msix - Configure MSI-X hardware
1847  *
1848  * e1000_configure_msix sets up the hardware to properly
1849  * generate MSI-X interrupts.
1850  **/
1851 static void e1000_configure_msix(struct e1000_adapter *adapter)
1852 {
1853         struct e1000_hw *hw = &adapter->hw;
1854         struct e1000_ring *rx_ring = adapter->rx_ring;
1855         struct e1000_ring *tx_ring = adapter->tx_ring;
1856         int vector = 0;
1857         u32 ctrl_ext, ivar = 0;
1858
1859         adapter->eiac_mask = 0;
1860
1861         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1862         if (hw->mac.type == e1000_82574) {
1863                 u32 rfctl = er32(RFCTL);
1864                 rfctl |= E1000_RFCTL_ACK_DIS;
1865                 ew32(RFCTL, rfctl);
1866         }
1867
1868 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1869         /* Configure Rx vector */
1870         rx_ring->ims_val = E1000_IMS_RXQ0;
1871         adapter->eiac_mask |= rx_ring->ims_val;
1872         if (rx_ring->itr_val)
1873                 writel(1000000000 / (rx_ring->itr_val * 256),
1874                        rx_ring->itr_register);
1875         else
1876                 writel(1, rx_ring->itr_register);
1877         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1878
1879         /* Configure Tx vector */
1880         tx_ring->ims_val = E1000_IMS_TXQ0;
1881         vector++;
1882         if (tx_ring->itr_val)
1883                 writel(1000000000 / (tx_ring->itr_val * 256),
1884                        tx_ring->itr_register);
1885         else
1886                 writel(1, tx_ring->itr_register);
1887         adapter->eiac_mask |= tx_ring->ims_val;
1888         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1889
1890         /* set vector for Other Causes, e.g. link changes */
1891         vector++;
1892         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1893         if (rx_ring->itr_val)
1894                 writel(1000000000 / (rx_ring->itr_val * 256),
1895                        hw->hw_addr + E1000_EITR_82574(vector));
1896         else
1897                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1898
1899         /* Cause Tx interrupts on every write back */
1900         ivar |= (1 << 31);
1901
1902         ew32(IVAR, ivar);
1903
1904         /* enable MSI-X PBA support */
1905         ctrl_ext = er32(CTRL_EXT);
1906         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
1907
1908         /* Auto-Mask Other interrupts upon ICR read */
1909 #define E1000_EIAC_MASK_82574   0x01F00000
1910         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
1911         ctrl_ext |= E1000_CTRL_EXT_EIAME;
1912         ew32(CTRL_EXT, ctrl_ext);
1913         e1e_flush();
1914 }
1915
1916 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
1917 {
1918         if (adapter->msix_entries) {
1919                 pci_disable_msix(adapter->pdev);
1920                 kfree(adapter->msix_entries);
1921                 adapter->msix_entries = NULL;
1922         } else if (adapter->flags & FLAG_MSI_ENABLED) {
1923                 pci_disable_msi(adapter->pdev);
1924                 adapter->flags &= ~FLAG_MSI_ENABLED;
1925         }
1926 }
1927
1928 /**
1929  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
1930  *
1931  * Attempt to configure interrupts using the best available
1932  * capabilities of the hardware and kernel.
1933  **/
1934 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
1935 {
1936         int err;
1937         int i;
1938
1939         switch (adapter->int_mode) {
1940         case E1000E_INT_MODE_MSIX:
1941                 if (adapter->flags & FLAG_HAS_MSIX) {
1942                         adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
1943                         adapter->msix_entries = kcalloc(adapter->num_vectors,
1944                                                       sizeof(struct msix_entry),
1945                                                       GFP_KERNEL);
1946                         if (adapter->msix_entries) {
1947                                 for (i = 0; i < adapter->num_vectors; i++)
1948                                         adapter->msix_entries[i].entry = i;
1949
1950                                 err = pci_enable_msix(adapter->pdev,
1951                                                       adapter->msix_entries,
1952                                                       adapter->num_vectors);
1953                                 if (err == 0)
1954                                         return;
1955                         }
1956                         /* MSI-X failed, so fall through and try MSI */
1957                         e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
1958                         e1000e_reset_interrupt_capability(adapter);
1959                 }
1960                 adapter->int_mode = E1000E_INT_MODE_MSI;
1961                 /* Fall through */
1962         case E1000E_INT_MODE_MSI:
1963                 if (!pci_enable_msi(adapter->pdev)) {
1964                         adapter->flags |= FLAG_MSI_ENABLED;
1965                 } else {
1966                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
1967                         e_err("Failed to initialize MSI interrupts.  Falling back to legacy interrupts.\n");
1968                 }
1969                 /* Fall through */
1970         case E1000E_INT_MODE_LEGACY:
1971                 /* Don't do anything; this is the system default */
1972                 break;
1973         }
1974
1975         /* store the number of vectors being used */
1976         adapter->num_vectors = 1;
1977 }
1978
1979 /**
1980  * e1000_request_msix - Initialize MSI-X interrupts
1981  *
1982  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
1983  * kernel.
1984  **/
1985 static int e1000_request_msix(struct e1000_adapter *adapter)
1986 {
1987         struct net_device *netdev = adapter->netdev;
1988         int err = 0, vector = 0;
1989
1990         if (strlen(netdev->name) < (IFNAMSIZ - 5))
1991                 snprintf(adapter->rx_ring->name,
1992                          sizeof(adapter->rx_ring->name) - 1,
1993                          "%s-rx-0", netdev->name);
1994         else
1995                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
1996         err = request_irq(adapter->msix_entries[vector].vector,
1997                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
1998                           netdev);
1999         if (err)
2000                 return err;
2001         adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2002             E1000_EITR_82574(vector);
2003         adapter->rx_ring->itr_val = adapter->itr;
2004         vector++;
2005
2006         if (strlen(netdev->name) < (IFNAMSIZ - 5))
2007                 snprintf(adapter->tx_ring->name,
2008                          sizeof(adapter->tx_ring->name) - 1,
2009                          "%s-tx-0", netdev->name);
2010         else
2011                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2012         err = request_irq(adapter->msix_entries[vector].vector,
2013                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
2014                           netdev);
2015         if (err)
2016                 return err;
2017         adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2018             E1000_EITR_82574(vector);
2019         adapter->tx_ring->itr_val = adapter->itr;
2020         vector++;
2021
2022         err = request_irq(adapter->msix_entries[vector].vector,
2023                           e1000_msix_other, 0, netdev->name, netdev);
2024         if (err)
2025                 return err;
2026
2027         e1000_configure_msix(adapter);
2028
2029         return 0;
2030 }
2031
2032 /**
2033  * e1000_request_irq - initialize interrupts
2034  *
2035  * Attempts to configure interrupts using the best available
2036  * capabilities of the hardware and kernel.
2037  **/
2038 static int e1000_request_irq(struct e1000_adapter *adapter)
2039 {
2040         struct net_device *netdev = adapter->netdev;
2041         int err;
2042
2043         if (adapter->msix_entries) {
2044                 err = e1000_request_msix(adapter);
2045                 if (!err)
2046                         return err;
2047                 /* fall back to MSI */
2048                 e1000e_reset_interrupt_capability(adapter);
2049                 adapter->int_mode = E1000E_INT_MODE_MSI;
2050                 e1000e_set_interrupt_capability(adapter);
2051         }
2052         if (adapter->flags & FLAG_MSI_ENABLED) {
2053                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
2054                                   netdev->name, netdev);
2055                 if (!err)
2056                         return err;
2057
2058                 /* fall back to legacy interrupt */
2059                 e1000e_reset_interrupt_capability(adapter);
2060                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2061         }
2062
2063         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2064                           netdev->name, netdev);
2065         if (err)
2066                 e_err("Unable to allocate interrupt, Error: %d\n", err);
2067
2068         return err;
2069 }
2070
2071 static void e1000_free_irq(struct e1000_adapter *adapter)
2072 {
2073         struct net_device *netdev = adapter->netdev;
2074
2075         if (adapter->msix_entries) {
2076                 int vector = 0;
2077
2078                 free_irq(adapter->msix_entries[vector].vector, netdev);
2079                 vector++;
2080
2081                 free_irq(adapter->msix_entries[vector].vector, netdev);
2082                 vector++;
2083
2084                 /* Other Causes interrupt vector */
2085                 free_irq(adapter->msix_entries[vector].vector, netdev);
2086                 return;
2087         }
2088
2089         free_irq(adapter->pdev->irq, netdev);
2090 }
2091
2092 /**
2093  * e1000_irq_disable - Mask off interrupt generation on the NIC
2094  **/
2095 static void e1000_irq_disable(struct e1000_adapter *adapter)
2096 {
2097         struct e1000_hw *hw = &adapter->hw;
2098
2099         ew32(IMC, ~0);
2100         if (adapter->msix_entries)
2101                 ew32(EIAC_82574, 0);
2102         e1e_flush();
2103
2104         if (adapter->msix_entries) {
2105                 int i;
2106                 for (i = 0; i < adapter->num_vectors; i++)
2107                         synchronize_irq(adapter->msix_entries[i].vector);
2108         } else {
2109                 synchronize_irq(adapter->pdev->irq);
2110         }
2111 }
2112
2113 /**
2114  * e1000_irq_enable - Enable default interrupt generation settings
2115  **/
2116 static void e1000_irq_enable(struct e1000_adapter *adapter)
2117 {
2118         struct e1000_hw *hw = &adapter->hw;
2119
2120         if (adapter->msix_entries) {
2121                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2122                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2123         } else {
2124                 ew32(IMS, IMS_ENABLE_MASK);
2125         }
2126         e1e_flush();
2127 }
2128
2129 /**
2130  * e1000e_get_hw_control - get control of the h/w from f/w
2131  * @adapter: address of board private structure
2132  *
2133  * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2134  * For ASF and Pass Through versions of f/w this means that
2135  * the driver is loaded. For AMT version (only with 82573)
2136  * of the f/w this means that the network i/f is open.
2137  **/
2138 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2139 {
2140         struct e1000_hw *hw = &adapter->hw;
2141         u32 ctrl_ext;
2142         u32 swsm;
2143
2144         /* Let firmware know the driver has taken over */
2145         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2146                 swsm = er32(SWSM);
2147                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2148         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2149                 ctrl_ext = er32(CTRL_EXT);
2150                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2151         }
2152 }
2153
2154 /**
2155  * e1000e_release_hw_control - release control of the h/w to f/w
2156  * @adapter: address of board private structure
2157  *
2158  * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2159  * For ASF and Pass Through versions of f/w this means that the
2160  * driver is no longer loaded. For AMT version (only with 82573) i
2161  * of the f/w this means that the network i/f is closed.
2162  *
2163  **/
2164 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2165 {
2166         struct e1000_hw *hw = &adapter->hw;
2167         u32 ctrl_ext;
2168         u32 swsm;
2169
2170         /* Let firmware taken over control of h/w */
2171         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2172                 swsm = er32(SWSM);
2173                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2174         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2175                 ctrl_ext = er32(CTRL_EXT);
2176                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2177         }
2178 }
2179
2180 /**
2181  * @e1000_alloc_ring - allocate memory for a ring structure
2182  **/
2183 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2184                                 struct e1000_ring *ring)
2185 {
2186         struct pci_dev *pdev = adapter->pdev;
2187
2188         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2189                                         GFP_KERNEL);
2190         if (!ring->desc)
2191                 return -ENOMEM;
2192
2193         return 0;
2194 }
2195
2196 /**
2197  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2198  * @tx_ring: Tx descriptor ring
2199  *
2200  * Return 0 on success, negative on failure
2201  **/
2202 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
2203 {
2204         struct e1000_adapter *adapter = tx_ring->adapter;
2205         int err = -ENOMEM, size;
2206
2207         size = sizeof(struct e1000_buffer) * tx_ring->count;
2208         tx_ring->buffer_info = vzalloc(size);
2209         if (!tx_ring->buffer_info)
2210                 goto err;
2211
2212         /* round up to nearest 4K */
2213         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2214         tx_ring->size = ALIGN(tx_ring->size, 4096);
2215
2216         err = e1000_alloc_ring_dma(adapter, tx_ring);
2217         if (err)
2218                 goto err;
2219
2220         tx_ring->next_to_use = 0;
2221         tx_ring->next_to_clean = 0;
2222
2223         return 0;
2224 err:
2225         vfree(tx_ring->buffer_info);
2226         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2227         return err;
2228 }
2229
2230 /**
2231  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2232  * @rx_ring: Rx descriptor ring
2233  *
2234  * Returns 0 on success, negative on failure
2235  **/
2236 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
2237 {
2238         struct e1000_adapter *adapter = rx_ring->adapter;
2239         struct e1000_buffer *buffer_info;
2240         int i, size, desc_len, err = -ENOMEM;
2241
2242         size = sizeof(struct e1000_buffer) * rx_ring->count;
2243         rx_ring->buffer_info = vzalloc(size);
2244         if (!rx_ring->buffer_info)
2245                 goto err;
2246
2247         for (i = 0; i < rx_ring->count; i++) {
2248                 buffer_info = &rx_ring->buffer_info[i];
2249                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2250                                                 sizeof(struct e1000_ps_page),
2251                                                 GFP_KERNEL);
2252                 if (!buffer_info->ps_pages)
2253                         goto err_pages;
2254         }
2255
2256         desc_len = sizeof(union e1000_rx_desc_packet_split);
2257
2258         /* Round up to nearest 4K */
2259         rx_ring->size = rx_ring->count * desc_len;
2260         rx_ring->size = ALIGN(rx_ring->size, 4096);
2261
2262         err = e1000_alloc_ring_dma(adapter, rx_ring);
2263         if (err)
2264                 goto err_pages;
2265
2266         rx_ring->next_to_clean = 0;
2267         rx_ring->next_to_use = 0;
2268         rx_ring->rx_skb_top = NULL;
2269
2270         return 0;
2271
2272 err_pages:
2273         for (i = 0; i < rx_ring->count; i++) {
2274                 buffer_info = &rx_ring->buffer_info[i];
2275                 kfree(buffer_info->ps_pages);
2276         }
2277 err:
2278         vfree(rx_ring->buffer_info);
2279         e_err("Unable to allocate memory for the receive descriptor ring\n");
2280         return err;
2281 }
2282
2283 /**
2284  * e1000_clean_tx_ring - Free Tx Buffers
2285  * @tx_ring: Tx descriptor ring
2286  **/
2287 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
2288 {
2289         struct e1000_adapter *adapter = tx_ring->adapter;
2290         struct e1000_buffer *buffer_info;
2291         unsigned long size;
2292         unsigned int i;
2293
2294         for (i = 0; i < tx_ring->count; i++) {
2295                 buffer_info = &tx_ring->buffer_info[i];
2296                 e1000_put_txbuf(tx_ring, buffer_info);
2297         }
2298
2299         netdev_reset_queue(adapter->netdev);
2300         size = sizeof(struct e1000_buffer) * tx_ring->count;
2301         memset(tx_ring->buffer_info, 0, size);
2302
2303         memset(tx_ring->desc, 0, tx_ring->size);
2304
2305         tx_ring->next_to_use = 0;
2306         tx_ring->next_to_clean = 0;
2307
2308         writel(0, tx_ring->head);
2309         writel(0, tx_ring->tail);
2310 }
2311
2312 /**
2313  * e1000e_free_tx_resources - Free Tx Resources per Queue
2314  * @tx_ring: Tx descriptor ring
2315  *
2316  * Free all transmit software resources
2317  **/
2318 void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
2319 {
2320         struct e1000_adapter *adapter = tx_ring->adapter;
2321         struct pci_dev *pdev = adapter->pdev;
2322
2323         e1000_clean_tx_ring(tx_ring);
2324
2325         vfree(tx_ring->buffer_info);
2326         tx_ring->buffer_info = NULL;
2327
2328         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2329                           tx_ring->dma);
2330         tx_ring->desc = NULL;
2331 }
2332
2333 /**
2334  * e1000e_free_rx_resources - Free Rx Resources
2335  * @rx_ring: Rx descriptor ring
2336  *
2337  * Free all receive software resources
2338  **/
2339 void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
2340 {
2341         struct e1000_adapter *adapter = rx_ring->adapter;
2342         struct pci_dev *pdev = adapter->pdev;
2343         int i;
2344
2345         e1000_clean_rx_ring(rx_ring);
2346
2347         for (i = 0; i < rx_ring->count; i++)
2348                 kfree(rx_ring->buffer_info[i].ps_pages);
2349
2350         vfree(rx_ring->buffer_info);
2351         rx_ring->buffer_info = NULL;
2352
2353         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2354                           rx_ring->dma);
2355         rx_ring->desc = NULL;
2356 }
2357
2358 /**
2359  * e1000_update_itr - update the dynamic ITR value based on statistics
2360  * @adapter: pointer to adapter
2361  * @itr_setting: current adapter->itr
2362  * @packets: the number of packets during this measurement interval
2363  * @bytes: the number of bytes during this measurement interval
2364  *
2365  *      Stores a new ITR value based on packets and byte
2366  *      counts during the last interrupt.  The advantage of per interrupt
2367  *      computation is faster updates and more accurate ITR for the current
2368  *      traffic pattern.  Constants in this function were computed
2369  *      based on theoretical maximum wire speed and thresholds were set based
2370  *      on testing data as well as attempting to minimize response time
2371  *      while increasing bulk throughput.  This functionality is controlled
2372  *      by the InterruptThrottleRate module parameter.
2373  **/
2374 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2375                                      u16 itr_setting, int packets,
2376                                      int bytes)
2377 {
2378         unsigned int retval = itr_setting;
2379
2380         if (packets == 0)
2381                 return itr_setting;
2382
2383         switch (itr_setting) {
2384         case lowest_latency:
2385                 /* handle TSO and jumbo frames */
2386                 if (bytes/packets > 8000)
2387                         retval = bulk_latency;
2388                 else if ((packets < 5) && (bytes > 512))
2389                         retval = low_latency;
2390                 break;
2391         case low_latency:  /* 50 usec aka 20000 ints/s */
2392                 if (bytes > 10000) {
2393                         /* this if handles the TSO accounting */
2394                         if (bytes/packets > 8000)
2395                                 retval = bulk_latency;
2396                         else if ((packets < 10) || ((bytes/packets) > 1200))
2397                                 retval = bulk_latency;
2398                         else if ((packets > 35))
2399                                 retval = lowest_latency;
2400                 } else if (bytes/packets > 2000) {
2401                         retval = bulk_latency;
2402                 } else if (packets <= 2 && bytes < 512) {
2403                         retval = lowest_latency;
2404                 }
2405                 break;
2406         case bulk_latency: /* 250 usec aka 4000 ints/s */
2407                 if (bytes > 25000) {
2408                         if (packets > 35)
2409                                 retval = low_latency;
2410                 } else if (bytes < 6000) {
2411                         retval = low_latency;
2412                 }
2413                 break;
2414         }
2415
2416         return retval;
2417 }
2418
2419 static void e1000_set_itr(struct e1000_adapter *adapter)
2420 {
2421         struct e1000_hw *hw = &adapter->hw;
2422         u16 current_itr;
2423         u32 new_itr = adapter->itr;
2424
2425         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2426         if (adapter->link_speed != SPEED_1000) {
2427                 current_itr = 0;
2428                 new_itr = 4000;
2429                 goto set_itr_now;
2430         }
2431
2432         if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2433                 new_itr = 0;
2434                 goto set_itr_now;
2435         }
2436
2437         adapter->tx_itr = e1000_update_itr(adapter,
2438                                     adapter->tx_itr,
2439                                     adapter->total_tx_packets,
2440                                     adapter->total_tx_bytes);
2441         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2442         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2443                 adapter->tx_itr = low_latency;
2444
2445         adapter->rx_itr = e1000_update_itr(adapter,
2446                                     adapter->rx_itr,
2447                                     adapter->total_rx_packets,
2448                                     adapter->total_rx_bytes);
2449         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2450         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2451                 adapter->rx_itr = low_latency;
2452
2453         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2454
2455         switch (current_itr) {
2456         /* counts and packets in update_itr are dependent on these numbers */
2457         case lowest_latency:
2458                 new_itr = 70000;
2459                 break;
2460         case low_latency:
2461                 new_itr = 20000; /* aka hwitr = ~200 */
2462                 break;
2463         case bulk_latency:
2464                 new_itr = 4000;
2465                 break;
2466         default:
2467                 break;
2468         }
2469
2470 set_itr_now:
2471         if (new_itr != adapter->itr) {
2472                 /*
2473                  * this attempts to bias the interrupt rate towards Bulk
2474                  * by adding intermediate steps when interrupt rate is
2475                  * increasing
2476                  */
2477                 new_itr = new_itr > adapter->itr ?
2478                              min(adapter->itr + (new_itr >> 2), new_itr) :
2479                              new_itr;
2480                 adapter->itr = new_itr;
2481                 adapter->rx_ring->itr_val = new_itr;
2482                 if (adapter->msix_entries)
2483                         adapter->rx_ring->set_itr = 1;
2484                 else
2485                         if (new_itr)
2486                                 ew32(ITR, 1000000000 / (new_itr * 256));
2487                         else
2488                                 ew32(ITR, 0);
2489         }
2490 }
2491
2492 /**
2493  * e1000_alloc_queues - Allocate memory for all rings
2494  * @adapter: board private structure to initialize
2495  **/
2496 static int __devinit e1000_alloc_queues(struct e1000_adapter *adapter)
2497 {
2498         int size = sizeof(struct e1000_ring);
2499
2500         adapter->tx_ring = kzalloc(size, GFP_KERNEL);
2501         if (!adapter->tx_ring)
2502                 goto err;
2503         adapter->tx_ring->count = adapter->tx_ring_count;
2504         adapter->tx_ring->adapter = adapter;
2505
2506         adapter->rx_ring = kzalloc(size, GFP_KERNEL);
2507         if (!adapter->rx_ring)
2508                 goto err;
2509         adapter->rx_ring->count = adapter->rx_ring_count;
2510         adapter->rx_ring->adapter = adapter;
2511
2512         return 0;
2513 err:
2514         e_err("Unable to allocate memory for queues\n");
2515         kfree(adapter->rx_ring);
2516         kfree(adapter->tx_ring);
2517         return -ENOMEM;
2518 }
2519
2520 /**
2521  * e1000_clean - NAPI Rx polling callback
2522  * @napi: struct associated with this polling callback
2523  * @budget: amount of packets driver is allowed to process this poll
2524  **/
2525 static int e1000_clean(struct napi_struct *napi, int budget)
2526 {
2527         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter, napi);
2528         struct e1000_hw *hw = &adapter->hw;
2529         struct net_device *poll_dev = adapter->netdev;
2530         int tx_cleaned = 1, work_done = 0;
2531
2532         adapter = netdev_priv(poll_dev);
2533
2534         if (adapter->msix_entries &&
2535             !(adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2536                 goto clean_rx;
2537
2538         tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
2539
2540 clean_rx:
2541         adapter->clean_rx(adapter->rx_ring, &work_done, budget);
2542
2543         if (!tx_cleaned)
2544                 work_done = budget;
2545
2546         /* If budget not fully consumed, exit the polling mode */
2547         if (work_done < budget) {
2548                 if (adapter->itr_setting & 3)
2549                         e1000_set_itr(adapter);
2550                 napi_complete(napi);
2551                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2552                         if (adapter->msix_entries)
2553                                 ew32(IMS, adapter->rx_ring->ims_val);
2554                         else
2555                                 e1000_irq_enable(adapter);
2556                 }
2557         }
2558
2559         return work_done;
2560 }
2561
2562 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2563 {
2564         struct e1000_adapter *adapter = netdev_priv(netdev);
2565         struct e1000_hw *hw = &adapter->hw;
2566         u32 vfta, index;
2567
2568         /* don't update vlan cookie if already programmed */
2569         if ((adapter->hw.mng_cookie.status &
2570              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2571             (vid == adapter->mng_vlan_id))
2572                 return 0;
2573
2574         /* add VID to filter table */
2575         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2576                 index = (vid >> 5) & 0x7F;
2577                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2578                 vfta |= (1 << (vid & 0x1F));
2579                 hw->mac.ops.write_vfta(hw, index, vfta);
2580         }
2581
2582         set_bit(vid, adapter->active_vlans);
2583
2584         return 0;
2585 }
2586
2587 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2588 {
2589         struct e1000_adapter *adapter = netdev_priv(netdev);
2590         struct e1000_hw *hw = &adapter->hw;
2591         u32 vfta, index;
2592
2593         if ((adapter->hw.mng_cookie.status &
2594              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2595             (vid == adapter->mng_vlan_id)) {
2596                 /* release control to f/w */
2597                 e1000e_release_hw_control(adapter);
2598                 return 0;
2599         }
2600
2601         /* remove VID from filter table */
2602         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2603                 index = (vid >> 5) & 0x7F;
2604                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2605                 vfta &= ~(1 << (vid & 0x1F));
2606                 hw->mac.ops.write_vfta(hw, index, vfta);
2607         }
2608
2609         clear_bit(vid, adapter->active_vlans);
2610
2611         return 0;
2612 }
2613
2614 /**
2615  * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2616  * @adapter: board private structure to initialize
2617  **/
2618 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2619 {
2620         struct net_device *netdev = adapter->netdev;
2621         struct e1000_hw *hw = &adapter->hw;
2622         u32 rctl;
2623
2624         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2625                 /* disable VLAN receive filtering */
2626                 rctl = er32(RCTL);
2627                 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2628                 ew32(RCTL, rctl);
2629
2630                 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2631                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2632                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2633                 }
2634         }
2635 }
2636
2637 /**
2638  * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2639  * @adapter: board private structure to initialize
2640  **/
2641 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2642 {
2643         struct e1000_hw *hw = &adapter->hw;
2644         u32 rctl;
2645
2646         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2647                 /* enable VLAN receive filtering */
2648                 rctl = er32(RCTL);
2649                 rctl |= E1000_RCTL_VFE;
2650                 rctl &= ~E1000_RCTL_CFIEN;
2651                 ew32(RCTL, rctl);
2652         }
2653 }
2654
2655 /**
2656  * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2657  * @adapter: board private structure to initialize
2658  **/
2659 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2660 {
2661         struct e1000_hw *hw = &adapter->hw;
2662         u32 ctrl;
2663
2664         /* disable VLAN tag insert/strip */
2665         ctrl = er32(CTRL);
2666         ctrl &= ~E1000_CTRL_VME;
2667         ew32(CTRL, ctrl);
2668 }
2669
2670 /**
2671  * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2672  * @adapter: board private structure to initialize
2673  **/
2674 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2675 {
2676         struct e1000_hw *hw = &adapter->hw;
2677         u32 ctrl;
2678
2679         /* enable VLAN tag insert/strip */
2680         ctrl = er32(CTRL);
2681         ctrl |= E1000_CTRL_VME;
2682         ew32(CTRL, ctrl);
2683 }
2684
2685 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2686 {
2687         struct net_device *netdev = adapter->netdev;
2688         u16 vid = adapter->hw.mng_cookie.vlan_id;
2689         u16 old_vid = adapter->mng_vlan_id;
2690
2691         if (adapter->hw.mng_cookie.status &
2692             E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2693                 e1000_vlan_rx_add_vid(netdev, vid);
2694                 adapter->mng_vlan_id = vid;
2695         }
2696
2697         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2698                 e1000_vlan_rx_kill_vid(netdev, old_vid);
2699 }
2700
2701 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2702 {
2703         u16 vid;
2704
2705         e1000_vlan_rx_add_vid(adapter->netdev, 0);
2706
2707         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2708                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2709 }
2710
2711 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2712 {
2713         struct e1000_hw *hw = &adapter->hw;
2714         u32 manc, manc2h, mdef, i, j;
2715
2716         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2717                 return;
2718
2719         manc = er32(MANC);
2720
2721         /*
2722          * enable receiving management packets to the host. this will probably
2723          * generate destination unreachable messages from the host OS, but
2724          * the packets will be handled on SMBUS
2725          */
2726         manc |= E1000_MANC_EN_MNG2HOST;
2727         manc2h = er32(MANC2H);
2728
2729         switch (hw->mac.type) {
2730         default:
2731                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2732                 break;
2733         case e1000_82574:
2734         case e1000_82583:
2735                 /*
2736                  * Check if IPMI pass-through decision filter already exists;
2737                  * if so, enable it.
2738                  */
2739                 for (i = 0, j = 0; i < 8; i++) {
2740                         mdef = er32(MDEF(i));
2741
2742                         /* Ignore filters with anything other than IPMI ports */
2743                         if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2744                                 continue;
2745
2746                         /* Enable this decision filter in MANC2H */
2747                         if (mdef)
2748                                 manc2h |= (1 << i);
2749
2750                         j |= mdef;
2751                 }
2752
2753                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2754                         break;
2755
2756                 /* Create new decision filter in an empty filter */
2757                 for (i = 0, j = 0; i < 8; i++)
2758                         if (er32(MDEF(i)) == 0) {
2759                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2760                                                E1000_MDEF_PORT_664));
2761                                 manc2h |= (1 << 1);
2762                                 j++;
2763                                 break;
2764                         }
2765
2766                 if (!j)
2767                         e_warn("Unable to create IPMI pass-through filter\n");
2768                 break;
2769         }
2770
2771         ew32(MANC2H, manc2h);
2772         ew32(MANC, manc);
2773 }
2774
2775 /**
2776  * e1000_configure_tx - Configure Transmit Unit after Reset
2777  * @adapter: board private structure
2778  *
2779  * Configure the Tx unit of the MAC after a reset.
2780  **/
2781 static void e1000_configure_tx(struct e1000_adapter *adapter)
2782 {
2783         struct e1000_hw *hw = &adapter->hw;
2784         struct e1000_ring *tx_ring = adapter->tx_ring;
2785         u64 tdba;
2786         u32 tdlen, tarc;
2787
2788         /* Setup the HW Tx Head and Tail descriptor pointers */
2789         tdba = tx_ring->dma;
2790         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2791         ew32(TDBAL, (tdba & DMA_BIT_MASK(32)));
2792         ew32(TDBAH, (tdba >> 32));
2793         ew32(TDLEN, tdlen);
2794         ew32(TDH, 0);
2795         ew32(TDT, 0);
2796         tx_ring->head = adapter->hw.hw_addr + E1000_TDH;
2797         tx_ring->tail = adapter->hw.hw_addr + E1000_TDT;
2798
2799         /* Set the Tx Interrupt Delay register */
2800         ew32(TIDV, adapter->tx_int_delay);
2801         /* Tx irq moderation */
2802         ew32(TADV, adapter->tx_abs_int_delay);
2803
2804         if (adapter->flags2 & FLAG2_DMA_BURST) {
2805                 u32 txdctl = er32(TXDCTL(0));
2806                 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2807                             E1000_TXDCTL_WTHRESH);
2808                 /*
2809                  * set up some performance related parameters to encourage the
2810                  * hardware to use the bus more efficiently in bursts, depends
2811                  * on the tx_int_delay to be enabled,
2812                  * wthresh = 5 ==> burst write a cacheline (64 bytes) at a time
2813                  * hthresh = 1 ==> prefetch when one or more available
2814                  * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2815                  * BEWARE: this seems to work but should be considered first if
2816                  * there are Tx hangs or other Tx related bugs
2817                  */
2818                 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2819                 ew32(TXDCTL(0), txdctl);
2820         }
2821         /* erratum work around: set txdctl the same for both queues */
2822         ew32(TXDCTL(1), er32(TXDCTL(0)));
2823
2824         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2825                 tarc = er32(TARC(0));
2826                 /*
2827                  * set the speed mode bit, we'll clear it if we're not at
2828                  * gigabit link later
2829                  */
2830 #define SPEED_MODE_BIT (1 << 21)
2831                 tarc |= SPEED_MODE_BIT;
2832                 ew32(TARC(0), tarc);
2833         }
2834
2835         /* errata: program both queues to unweighted RR */
2836         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2837                 tarc = er32(TARC(0));
2838                 tarc |= 1;
2839                 ew32(TARC(0), tarc);
2840                 tarc = er32(TARC(1));
2841                 tarc |= 1;
2842                 ew32(TARC(1), tarc);
2843         }
2844
2845         /* Setup Transmit Descriptor Settings for eop descriptor */
2846         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2847
2848         /* only set IDE if we are delaying interrupts using the timers */
2849         if (adapter->tx_int_delay)
2850                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2851
2852         /* enable Report Status bit */
2853         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2854
2855         hw->mac.ops.config_collision_dist(hw);
2856 }
2857
2858 /**
2859  * e1000_setup_rctl - configure the receive control registers
2860  * @adapter: Board private structure
2861  **/
2862 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2863                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2864 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2865 {
2866         struct e1000_hw *hw = &adapter->hw;
2867         u32 rctl, rfctl;
2868         u32 pages = 0;
2869
2870         /* Workaround Si errata on 82579 - configure jumbo frame flow */
2871         if (hw->mac.type == e1000_pch2lan) {
2872                 s32 ret_val;
2873
2874                 if (adapter->netdev->mtu > ETH_DATA_LEN)
2875                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
2876                 else
2877                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
2878
2879                 if (ret_val)
2880                         e_dbg("failed to enable jumbo frame workaround mode\n");
2881         }
2882
2883         /* Program MC offset vector base */
2884         rctl = er32(RCTL);
2885         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2886         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2887                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2888                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
2889
2890         /* Do not Store bad packets */
2891         rctl &= ~E1000_RCTL_SBP;
2892
2893         /* Enable Long Packet receive */
2894         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2895                 rctl &= ~E1000_RCTL_LPE;
2896         else
2897                 rctl |= E1000_RCTL_LPE;
2898
2899         /* Some systems expect that the CRC is included in SMBUS traffic. The
2900          * hardware strips the CRC before sending to both SMBUS (BMC) and to
2901          * host memory when this is enabled
2902          */
2903         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
2904                 rctl |= E1000_RCTL_SECRC;
2905
2906         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
2907         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
2908                 u16 phy_data;
2909
2910                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
2911                 phy_data &= 0xfff8;
2912                 phy_data |= (1 << 2);
2913                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
2914
2915                 e1e_rphy(hw, 22, &phy_data);
2916                 phy_data &= 0x0fff;
2917                 phy_data |= (1 << 14);
2918                 e1e_wphy(hw, 0x10, 0x2823);
2919                 e1e_wphy(hw, 0x11, 0x0003);
2920                 e1e_wphy(hw, 22, phy_data);
2921         }
2922
2923         /* Setup buffer sizes */
2924         rctl &= ~E1000_RCTL_SZ_4096;
2925         rctl |= E1000_RCTL_BSEX;
2926         switch (adapter->rx_buffer_len) {
2927         case 2048:
2928         default:
2929                 rctl |= E1000_RCTL_SZ_2048;
2930                 rctl &= ~E1000_RCTL_BSEX;
2931                 break;
2932         case 4096:
2933                 rctl |= E1000_RCTL_SZ_4096;
2934                 break;
2935         case 8192:
2936                 rctl |= E1000_RCTL_SZ_8192;
2937                 break;
2938         case 16384:
2939                 rctl |= E1000_RCTL_SZ_16384;
2940                 break;
2941         }
2942
2943         /* Enable Extended Status in all Receive Descriptors */
2944         rfctl = er32(RFCTL);
2945         rfctl |= E1000_RFCTL_EXTEN;
2946
2947         /*
2948          * 82571 and greater support packet-split where the protocol
2949          * header is placed in skb->data and the packet data is
2950          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
2951          * In the case of a non-split, skb->data is linearly filled,
2952          * followed by the page buffers.  Therefore, skb->data is
2953          * sized to hold the largest protocol header.
2954          *
2955          * allocations using alloc_page take too long for regular MTU
2956          * so only enable packet split for jumbo frames
2957          *
2958          * Using pages when the page size is greater than 16k wastes
2959          * a lot of memory, since we allocate 3 pages at all times
2960          * per packet.
2961          */
2962         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
2963         if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
2964                 adapter->rx_ps_pages = pages;
2965         else
2966                 adapter->rx_ps_pages = 0;
2967
2968         if (adapter->rx_ps_pages) {
2969                 u32 psrctl = 0;
2970
2971                 /*
2972                  * disable packet split support for IPv6 extension headers,
2973                  * because some malformed IPv6 headers can hang the Rx
2974                  */
2975                 rfctl |= (E1000_RFCTL_IPV6_EX_DIS |
2976                           E1000_RFCTL_NEW_IPV6_EXT_DIS);
2977
2978                 /* Enable Packet split descriptors */
2979                 rctl |= E1000_RCTL_DTYP_PS;
2980
2981                 psrctl |= adapter->rx_ps_bsize0 >>
2982                         E1000_PSRCTL_BSIZE0_SHIFT;
2983
2984                 switch (adapter->rx_ps_pages) {
2985                 case 3:
2986                         psrctl |= PAGE_SIZE <<
2987                                 E1000_PSRCTL_BSIZE3_SHIFT;
2988                 case 2:
2989                         psrctl |= PAGE_SIZE <<
2990                                 E1000_PSRCTL_BSIZE2_SHIFT;
2991                 case 1:
2992                         psrctl |= PAGE_SIZE >>
2993                                 E1000_PSRCTL_BSIZE1_SHIFT;
2994                         break;
2995                 }
2996
2997                 ew32(PSRCTL, psrctl);
2998         }
2999
3000         /* This is useful for sniffing bad packets. */
3001         if (adapter->netdev->features & NETIF_F_RXALL) {
3002                 /* UPE and MPE will be handled by normal PROMISC logic
3003                  * in e1000e_set_rx_mode */
3004                 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
3005                          E1000_RCTL_BAM | /* RX All Bcast Pkts */
3006                          E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
3007
3008                 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
3009                           E1000_RCTL_DPF | /* Allow filtered pause */
3010                           E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
3011                 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3012                  * and that breaks VLANs.
3013                  */
3014         }
3015
3016         ew32(RFCTL, rfctl);
3017         ew32(RCTL, rctl);
3018         /* just started the receive unit, no need to restart */
3019         adapter->flags &= ~FLAG_RX_RESTART_NOW;
3020 }
3021
3022 /**
3023  * e1000_configure_rx - Configure Receive Unit after Reset
3024  * @adapter: board private structure
3025  *
3026  * Configure the Rx unit of the MAC after a reset.
3027  **/
3028 static void e1000_configure_rx(struct e1000_adapter *adapter)
3029 {
3030         struct e1000_hw *hw = &adapter->hw;
3031         struct e1000_ring *rx_ring = adapter->rx_ring;
3032         u64 rdba;
3033         u32 rdlen, rctl, rxcsum, ctrl_ext;
3034
3035         if (adapter->rx_ps_pages) {
3036                 /* this is a 32 byte descriptor */
3037                 rdlen = rx_ring->count *
3038                     sizeof(union e1000_rx_desc_packet_split);
3039                 adapter->clean_rx = e1000_clean_rx_irq_ps;
3040                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
3041         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
3042                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3043                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3044                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
3045         } else {
3046                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3047                 adapter->clean_rx = e1000_clean_rx_irq;
3048                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3049         }
3050
3051         /* disable receives while setting up the descriptors */
3052         rctl = er32(RCTL);
3053         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3054                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3055         e1e_flush();
3056         usleep_range(10000, 20000);
3057
3058         if (adapter->flags2 & FLAG2_DMA_BURST) {
3059                 /*
3060                  * set the writeback threshold (only takes effect if the RDTR
3061                  * is set). set GRAN=1 and write back up to 0x4 worth, and
3062                  * enable prefetching of 0x20 Rx descriptors
3063                  * granularity = 01
3064                  * wthresh = 04,
3065                  * hthresh = 04,
3066                  * pthresh = 0x20
3067                  */
3068                 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3069                 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3070
3071                 /*
3072                  * override the delay timers for enabling bursting, only if
3073                  * the value was not set by the user via module options
3074                  */
3075                 if (adapter->rx_int_delay == DEFAULT_RDTR)
3076                         adapter->rx_int_delay = BURST_RDTR;
3077                 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3078                         adapter->rx_abs_int_delay = BURST_RADV;
3079         }
3080
3081         /* set the Receive Delay Timer Register */
3082         ew32(RDTR, adapter->rx_int_delay);
3083
3084         /* irq moderation */
3085         ew32(RADV, adapter->rx_abs_int_delay);
3086         if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3087                 ew32(ITR, 1000000000 / (adapter->itr * 256));
3088
3089         ctrl_ext = er32(CTRL_EXT);
3090         /* Auto-Mask interrupts upon ICR access */
3091         ctrl_ext |= E1000_CTRL_EXT_IAME;
3092         ew32(IAM, 0xffffffff);
3093         ew32(CTRL_EXT, ctrl_ext);
3094         e1e_flush();
3095
3096         /*
3097          * Setup the HW Rx Head and Tail Descriptor Pointers and
3098          * the Base and Length of the Rx Descriptor Ring
3099          */
3100         rdba = rx_ring->dma;
3101         ew32(RDBAL, (rdba & DMA_BIT_MASK(32)));
3102         ew32(RDBAH, (rdba >> 32));
3103         ew32(RDLEN, rdlen);
3104         ew32(RDH, 0);
3105         ew32(RDT, 0);
3106         rx_ring->head = adapter->hw.hw_addr + E1000_RDH;
3107         rx_ring->tail = adapter->hw.hw_addr + E1000_RDT;
3108
3109         /* Enable Receive Checksum Offload for TCP and UDP */
3110         rxcsum = er32(RXCSUM);
3111         if (adapter->netdev->features & NETIF_F_RXCSUM) {
3112                 rxcsum |= E1000_RXCSUM_TUOFL;
3113
3114                 /*
3115                  * IPv4 payload checksum for UDP fragments must be
3116                  * used in conjunction with packet-split.
3117                  */
3118                 if (adapter->rx_ps_pages)
3119                         rxcsum |= E1000_RXCSUM_IPPCSE;
3120         } else {
3121                 rxcsum &= ~E1000_RXCSUM_TUOFL;
3122                 /* no need to clear IPPCSE as it defaults to 0 */
3123         }
3124         ew32(RXCSUM, rxcsum);
3125
3126         if (adapter->hw.mac.type == e1000_pch2lan) {
3127                 /*
3128                  * With jumbo frames, excessive C-state transition
3129                  * latencies result in dropped transactions.
3130                  */
3131                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3132                         u32 rxdctl = er32(RXDCTL(0));
3133                         ew32(RXDCTL(0), rxdctl | 0x3);
3134                         pm_qos_update_request(&adapter->netdev->pm_qos_req, 55);
3135                 } else {
3136                         pm_qos_update_request(&adapter->netdev->pm_qos_req,
3137                                               PM_QOS_DEFAULT_VALUE);
3138                 }
3139         }
3140
3141         /* Enable Receives */
3142         ew32(RCTL, rctl);
3143 }
3144
3145 /**
3146  * e1000e_write_mc_addr_list - write multicast addresses to MTA
3147  * @netdev: network interface device structure
3148  *
3149  * Writes multicast address list to the MTA hash table.
3150  * Returns: -ENOMEM on failure
3151  *                0 on no addresses written
3152  *                X on writing X addresses to MTA
3153  */
3154 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3155 {
3156         struct e1000_adapter *adapter = netdev_priv(netdev);
3157         struct e1000_hw *hw = &adapter->hw;
3158         struct netdev_hw_addr *ha;
3159         u8 *mta_list;
3160         int i;
3161
3162         if (netdev_mc_empty(netdev)) {
3163                 /* nothing to program, so clear mc list */
3164                 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3165                 return 0;
3166         }
3167
3168         mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3169         if (!mta_list)
3170                 return -ENOMEM;
3171
3172         /* update_mc_addr_list expects a packed array of only addresses. */
3173         i = 0;
3174         netdev_for_each_mc_addr(ha, netdev)
3175                 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3176
3177         hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3178         kfree(mta_list);
3179
3180         return netdev_mc_count(netdev);
3181 }
3182
3183 /**
3184  * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3185  * @netdev: network interface device structure
3186  *
3187  * Writes unicast address list to the RAR table.
3188  * Returns: -ENOMEM on failure/insufficient address space
3189  *                0 on no addresses written
3190  *                X on writing X addresses to the RAR table
3191  **/
3192 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3193 {
3194         struct e1000_adapter *adapter = netdev_priv(netdev);
3195         struct e1000_hw *hw = &adapter->hw;
3196         unsigned int rar_entries = hw->mac.rar_entry_count;
3197         int count = 0;
3198
3199         /* save a rar entry for our hardware address */
3200         rar_entries--;
3201
3202         /* save a rar entry for the LAA workaround */
3203         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3204                 rar_entries--;
3205
3206         /* return ENOMEM indicating insufficient memory for addresses */
3207         if (netdev_uc_count(netdev) > rar_entries)
3208                 return -ENOMEM;
3209
3210         if (!netdev_uc_empty(netdev) && rar_entries) {
3211                 struct netdev_hw_addr *ha;
3212
3213                 /*
3214                  * write the addresses in reverse order to avoid write
3215                  * combining
3216                  */
3217                 netdev_for_each_uc_addr(ha, netdev) {
3218                         if (!rar_entries)
3219                                 break;
3220                         e1000e_rar_set(hw, ha->addr, rar_entries--);
3221                         count++;
3222                 }
3223         }
3224
3225         /* zero out the remaining RAR entries not used above */
3226         for (; rar_entries > 0; rar_entries--) {
3227                 ew32(RAH(rar_entries), 0);
3228                 ew32(RAL(rar_entries), 0);
3229         }
3230         e1e_flush();
3231
3232         return count;
3233 }
3234
3235 /**
3236  * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3237  * @netdev: network interface device structure
3238  *
3239  * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3240  * address list or the network interface flags are updated.  This routine is
3241  * responsible for configuring the hardware for proper unicast, multicast,
3242  * promiscuous mode, and all-multi behavior.
3243  **/
3244 static void e1000e_set_rx_mode(struct net_device *netdev)
3245 {
3246         struct e1000_adapter *adapter = netdev_priv(netdev);
3247         struct e1000_hw *hw = &adapter->hw;
3248         u32 rctl;
3249
3250         /* Check for Promiscuous and All Multicast modes */
3251         rctl = er32(RCTL);
3252
3253         /* clear the affected bits */
3254         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3255
3256         if (netdev->flags & IFF_PROMISC) {
3257                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3258                 /* Do not hardware filter VLANs in promisc mode */
3259                 e1000e_vlan_filter_disable(adapter);
3260         } else {
3261                 int count;
3262
3263                 if (netdev->flags & IFF_ALLMULTI) {
3264                         rctl |= E1000_RCTL_MPE;
3265                 } else {
3266                         /*
3267                          * Write addresses to the MTA, if the attempt fails
3268                          * then we should just turn on promiscuous mode so
3269                          * that we can at least receive multicast traffic
3270                          */
3271                         count = e1000e_write_mc_addr_list(netdev);
3272                         if (count < 0)
3273                                 rctl |= E1000_RCTL_MPE;
3274                 }
3275                 e1000e_vlan_filter_enable(adapter);
3276                 /*
3277                  * Write addresses to available RAR registers, if there is not
3278                  * sufficient space to store all the addresses then enable
3279                  * unicast promiscuous mode
3280                  */
3281                 count = e1000e_write_uc_addr_list(netdev);
3282                 if (count < 0)
3283                         rctl |= E1000_RCTL_UPE;
3284         }
3285
3286         ew32(RCTL, rctl);
3287
3288         if (netdev->features & NETIF_F_HW_VLAN_RX)
3289                 e1000e_vlan_strip_enable(adapter);
3290         else
3291                 e1000e_vlan_strip_disable(adapter);
3292 }
3293
3294 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3295 {
3296         struct e1000_hw *hw = &adapter->hw;
3297         u32 mrqc, rxcsum;
3298         int i;
3299         static const u32 rsskey[10] = {
3300                 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3301                 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3302         };
3303
3304         /* Fill out hash function seed */
3305         for (i = 0; i < 10; i++)
3306                 ew32(RSSRK(i), rsskey[i]);
3307
3308         /* Direct all traffic to queue 0 */
3309         for (i = 0; i < 32; i++)
3310                 ew32(RETA(i), 0);
3311
3312         /*
3313          * Disable raw packet checksumming so that RSS hash is placed in
3314          * descriptor on writeback.
3315          */
3316         rxcsum = er32(RXCSUM);
3317         rxcsum |= E1000_RXCSUM_PCSD;
3318
3319         ew32(RXCSUM, rxcsum);
3320
3321         mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3322                 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3323                 E1000_MRQC_RSS_FIELD_IPV6 |
3324                 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3325                 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3326
3327         ew32(MRQC, mrqc);
3328 }
3329
3330 /**
3331  * e1000_configure - configure the hardware for Rx and Tx
3332  * @adapter: private board structure
3333  **/
3334 static void e1000_configure(struct e1000_adapter *adapter)
3335 {
3336         struct e1000_ring *rx_ring = adapter->rx_ring;
3337
3338         e1000e_set_rx_mode(adapter->netdev);
3339
3340         e1000_restore_vlan(adapter);
3341         e1000_init_manageability_pt(adapter);
3342
3343         e1000_configure_tx(adapter);
3344
3345         if (adapter->netdev->features & NETIF_F_RXHASH)
3346                 e1000e_setup_rss_hash(adapter);
3347         e1000_setup_rctl(adapter);
3348         e1000_configure_rx(adapter);
3349         adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
3350 }
3351
3352 /**
3353  * e1000e_power_up_phy - restore link in case the phy was powered down
3354  * @adapter: address of board private structure
3355  *
3356  * The phy may be powered down to save power and turn off link when the
3357  * driver is unloaded and wake on lan is not enabled (among others)
3358  * *** this routine MUST be followed by a call to e1000e_reset ***
3359  **/
3360 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3361 {
3362         if (adapter->hw.phy.ops.power_up)
3363                 adapter->hw.phy.ops.power_up(&adapter->hw);
3364
3365         adapter->hw.mac.ops.setup_link(&adapter->hw);
3366 }
3367
3368 /**
3369  * e1000_power_down_phy - Power down the PHY
3370  *
3371  * Power down the PHY so no link is implied when interface is down.
3372  * The PHY cannot be powered down if management or WoL is active.
3373  */
3374 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3375 {
3376         /* WoL is enabled */
3377         if (adapter->wol)
3378                 return;
3379
3380         if (adapter->hw.phy.ops.power_down)
3381                 adapter->hw.phy.ops.power_down(&adapter->hw);
3382 }
3383
3384 /**
3385  * e1000e_reset - bring the hardware into a known good state
3386  *
3387  * This function boots the hardware and enables some settings that
3388  * require a configuration cycle of the hardware - those cannot be
3389  * set/changed during runtime. After reset the device needs to be
3390  * properly configured for Rx, Tx etc.
3391  */
3392 void e1000e_reset(struct e1000_adapter *adapter)
3393 {
3394         struct e1000_mac_info *mac = &adapter->hw.mac;
3395         struct e1000_fc_info *fc = &adapter->hw.fc;
3396         struct e1000_hw *hw = &adapter->hw;
3397         u32 tx_space, min_tx_space, min_rx_space;
3398         u32 pba = adapter->pba;
3399         u16 hwm;
3400
3401         /* reset Packet Buffer Allocation to default */
3402         ew32(PBA, pba);
3403
3404         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3405                 /*
3406                  * To maintain wire speed transmits, the Tx FIFO should be
3407                  * large enough to accommodate two full transmit packets,
3408                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3409                  * the Rx FIFO should be large enough to accommodate at least
3410                  * one full receive packet and is similarly rounded up and
3411                  * expressed in KB.
3412                  */
3413                 pba = er32(PBA);
3414                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3415                 tx_space = pba >> 16;
3416                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3417                 pba &= 0xffff;
3418                 /*
3419                  * the Tx fifo also stores 16 bytes of information about the Tx
3420                  * but don't include ethernet FCS because hardware appends it
3421                  */
3422                 min_tx_space = (adapter->max_frame_size +
3423                                 sizeof(struct e1000_tx_desc) -
3424                                 ETH_FCS_LEN) * 2;
3425                 min_tx_space = ALIGN(min_tx_space, 1024);
3426                 min_tx_space >>= 10;
3427                 /* software strips receive CRC, so leave room for it */
3428                 min_rx_space = adapter->max_frame_size;
3429                 min_rx_space = ALIGN(min_rx_space, 1024);
3430                 min_rx_space >>= 10;
3431
3432                 /*
3433                  * If current Tx allocation is less than the min Tx FIFO size,
3434                  * and the min Tx FIFO size is less than the current Rx FIFO
3435                  * allocation, take space away from current Rx allocation
3436                  */
3437                 if ((tx_space < min_tx_space) &&
3438                     ((min_tx_space - tx_space) < pba)) {
3439                         pba -= min_tx_space - tx_space;
3440
3441                         /*
3442                          * if short on Rx space, Rx wins and must trump Tx
3443                          * adjustment or use Early Receive if available
3444                          */
3445                         if (pba < min_rx_space)
3446                                 pba = min_rx_space;
3447                 }
3448
3449                 ew32(PBA, pba);
3450         }
3451
3452         /*
3453          * flow control settings
3454          *
3455          * The high water mark must be low enough to fit one full frame
3456          * (or the size used for early receive) above it in the Rx FIFO.
3457          * Set it to the lower of:
3458          * - 90% of the Rx FIFO size, and
3459          * - the full Rx FIFO size minus one full frame
3460          */
3461         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3462                 fc->pause_time = 0xFFFF;
3463         else
3464                 fc->pause_time = E1000_FC_PAUSE_TIME;
3465         fc->send_xon = true;
3466         fc->current_mode = fc->requested_mode;
3467
3468         switch (hw->mac.type) {
3469         case e1000_ich9lan:
3470         case e1000_ich10lan:
3471                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3472                         pba = 14;
3473                         ew32(PBA, pba);
3474                         fc->high_water = 0x2800;
3475                         fc->low_water = fc->high_water - 8;
3476                         break;
3477                 }
3478                 /* fall-through */
3479         default:
3480                 hwm = min(((pba << 10) * 9 / 10),
3481                           ((pba << 10) - adapter->max_frame_size));
3482
3483                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3484                 fc->low_water = fc->high_water - 8;
3485                 break;
3486         case e1000_pchlan:
3487                 /*
3488                  * Workaround PCH LOM adapter hangs with certain network
3489                  * loads.  If hangs persist, try disabling Tx flow control.
3490                  */
3491                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3492                         fc->high_water = 0x3500;
3493                         fc->low_water  = 0x1500;
3494                 } else {
3495                         fc->high_water = 0x5000;
3496                         fc->low_water  = 0x3000;
3497                 }
3498                 fc->refresh_time = 0x1000;
3499                 break;
3500         case e1000_pch2lan:
3501                 fc->high_water = 0x05C20;
3502                 fc->low_water = 0x05048;
3503                 fc->pause_time = 0x0650;
3504                 fc->refresh_time = 0x0400;
3505                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3506                         pba = 14;
3507                         ew32(PBA, pba);
3508                 }
3509                 break;
3510         }
3511
3512         /*
3513          * Disable Adaptive Interrupt Moderation if 2 full packets cannot
3514          * fit in receive buffer.
3515          */
3516         if (adapter->itr_setting & 0x3) {
3517                 if ((adapter->max_frame_size * 2) > (pba << 10)) {
3518                         if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3519                                 dev_info(&adapter->pdev->dev,
3520                                         "Interrupt Throttle Rate turned off\n");
3521                                 adapter->flags2 |= FLAG2_DISABLE_AIM;
3522                                 ew32(ITR, 0);
3523                         }
3524                 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3525                         dev_info(&adapter->pdev->dev,
3526                                  "Interrupt Throttle Rate turned on\n");
3527                         adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3528                         adapter->itr = 20000;
3529                         ew32(ITR, 1000000000 / (adapter->itr * 256));
3530                 }
3531         }
3532
3533         /* Allow time for pending master requests to run */
3534         mac->ops.reset_hw(hw);
3535
3536         /*
3537          * For parts with AMT enabled, let the firmware know
3538          * that the network interface is in control
3539          */
3540         if (adapter->flags & FLAG_HAS_AMT)
3541                 e1000e_get_hw_control(adapter);
3542
3543         ew32(WUC, 0);
3544
3545         if (mac->ops.init_hw(hw))
3546                 e_err("Hardware Error\n");
3547
3548         e1000_update_mng_vlan(adapter);
3549
3550         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3551         ew32(VET, ETH_P_8021Q);
3552
3553         e1000e_reset_adaptive(hw);
3554
3555         if (!netif_running(adapter->netdev) &&
3556             !test_bit(__E1000_TESTING, &adapter->state)) {
3557                 e1000_power_down_phy(adapter);
3558                 return;
3559         }
3560
3561         e1000_get_phy_info(hw);
3562
3563         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3564             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3565                 u16 phy_data = 0;
3566                 /*
3567                  * speed up time to link by disabling smart power down, ignore
3568                  * the return value of this function because there is nothing
3569                  * different we would do if it failed
3570                  */
3571                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3572                 phy_data &= ~IGP02E1000_PM_SPD;
3573                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3574         }
3575 }
3576
3577 int e1000e_up(struct e1000_adapter *adapter)
3578 {
3579         struct e1000_hw *hw = &adapter->hw;
3580
3581         /* hardware has been reset, we need to reload some things */
3582         e1000_configure(adapter);
3583
3584         clear_bit(__E1000_DOWN, &adapter->state);
3585
3586         if (adapter->msix_entries)
3587                 e1000_configure_msix(adapter);
3588         e1000_irq_enable(adapter);
3589
3590         netif_start_queue(adapter->netdev);
3591
3592         /* fire a link change interrupt to start the watchdog */
3593         if (adapter->msix_entries)
3594                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3595         else
3596                 ew32(ICS, E1000_ICS_LSC);
3597
3598         return 0;
3599 }
3600
3601 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3602 {
3603         struct e1000_hw *hw = &adapter->hw;
3604
3605         if (!(adapter->flags2 & FLAG2_DMA_BURST))
3606                 return;
3607
3608         /* flush pending descriptor writebacks to memory */
3609         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3610         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3611
3612         /* execute the writes immediately */
3613         e1e_flush();
3614 }
3615
3616 static void e1000e_update_stats(struct e1000_adapter *adapter);
3617
3618 void e1000e_down(struct e1000_adapter *adapter)
3619 {
3620         struct net_device *netdev = adapter->netdev;
3621         struct e1000_hw *hw = &adapter->hw;
3622         u32 tctl, rctl;
3623
3624         /*
3625          * signal that we're down so the interrupt handler does not
3626          * reschedule our watchdog timer
3627          */
3628         set_bit(__E1000_DOWN, &adapter->state);
3629
3630         /* disable receives in the hardware */
3631         rctl = er32(RCTL);
3632         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3633                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3634         /* flush and sleep below */
3635
3636         netif_stop_queue(netdev);
3637
3638         /* disable transmits in the hardware */
3639         tctl = er32(TCTL);
3640         tctl &= ~E1000_TCTL_EN;
3641         ew32(TCTL, tctl);
3642
3643         /* flush both disables and wait for them to finish */
3644         e1e_flush();
3645         usleep_range(10000, 20000);
3646
3647         e1000_irq_disable(adapter);
3648
3649         del_timer_sync(&adapter->watchdog_timer);
3650         del_timer_sync(&adapter->phy_info_timer);
3651
3652         netif_carrier_off(netdev);
3653
3654         spin_lock(&adapter->stats64_lock);
3655         e1000e_update_stats(adapter);
3656         spin_unlock(&adapter->stats64_lock);
3657
3658         e1000e_flush_descriptors(adapter);
3659         e1000_clean_tx_ring(adapter->tx_ring);
3660         e1000_clean_rx_ring(adapter->rx_ring);
3661
3662         adapter->link_speed = 0;
3663         adapter->link_duplex = 0;
3664
3665         if (!pci_channel_offline(adapter->pdev))
3666                 e1000e_reset(adapter);
3667
3668         /*
3669          * TODO: for power management, we could drop the link and
3670          * pci_disable_device here.
3671          */
3672 }
3673
3674 void e1000e_reinit_locked(struct e1000_adapter *adapter)
3675 {
3676         might_sleep();
3677         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
3678                 usleep_range(1000, 2000);
3679         e1000e_down(adapter);
3680         e1000e_up(adapter);
3681         clear_bit(__E1000_RESETTING, &adapter->state);
3682 }
3683
3684 /**
3685  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
3686  * @adapter: board private structure to initialize
3687  *
3688  * e1000_sw_init initializes the Adapter private data structure.
3689  * Fields are initialized based on PCI device information and
3690  * OS network device settings (MTU size).
3691  **/
3692 static int __devinit e1000_sw_init(struct e1000_adapter *adapter)
3693 {
3694         struct net_device *netdev = adapter->netdev;
3695
3696         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
3697         adapter->rx_ps_bsize0 = 128;
3698         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3699         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
3700         adapter->tx_ring_count = E1000_DEFAULT_TXD;
3701         adapter->rx_ring_count = E1000_DEFAULT_RXD;
3702
3703         spin_lock_init(&adapter->stats64_lock);
3704
3705         e1000e_set_interrupt_capability(adapter);
3706
3707         if (e1000_alloc_queues(adapter))
3708                 return -ENOMEM;
3709
3710         /* Explicitly disable IRQ since the NIC can be in any state. */
3711         e1000_irq_disable(adapter);
3712
3713         set_bit(__E1000_DOWN, &adapter->state);
3714         return 0;
3715 }
3716
3717 /**
3718  * e1000_intr_msi_test - Interrupt Handler
3719  * @irq: interrupt number
3720  * @data: pointer to a network interface device structure
3721  **/
3722 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
3723 {
3724         struct net_device *netdev = data;
3725         struct e1000_adapter *adapter = netdev_priv(netdev);
3726         struct e1000_hw *hw = &adapter->hw;
3727         u32 icr = er32(ICR);
3728
3729         e_dbg("icr is %08X\n", icr);
3730         if (icr & E1000_ICR_RXSEQ) {
3731                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
3732                 wmb();
3733         }
3734
3735         return IRQ_HANDLED;
3736 }
3737
3738 /**
3739  * e1000_test_msi_interrupt - Returns 0 for successful test
3740  * @adapter: board private struct
3741  *
3742  * code flow taken from tg3.c
3743  **/
3744 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
3745 {
3746         struct net_device *netdev = adapter->netdev;
3747         struct e1000_hw *hw = &adapter->hw;
3748         int err;
3749
3750         /* poll_enable hasn't been called yet, so don't need disable */
3751         /* clear any pending events */
3752         er32(ICR);
3753
3754         /* free the real vector and request a test handler */
3755         e1000_free_irq(adapter);
3756         e1000e_reset_interrupt_capability(adapter);
3757
3758         /* Assume that the test fails, if it succeeds then the test
3759          * MSI irq handler will unset this flag */
3760         adapter->flags |= FLAG_MSI_TEST_FAILED;
3761
3762         err = pci_enable_msi(adapter->pdev);
3763         if (err)
3764                 goto msi_test_failed;
3765
3766         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
3767                           netdev->name, netdev);
3768         if (err) {
3769                 pci_disable_msi(adapter->pdev);
3770                 goto msi_test_failed;
3771         }
3772
3773         wmb();
3774
3775         e1000_irq_enable(adapter);
3776
3777         /* fire an unusual interrupt on the test handler */
3778         ew32(ICS, E1000_ICS_RXSEQ);
3779         e1e_flush();
3780         msleep(50);
3781
3782         e1000_irq_disable(adapter);
3783
3784         rmb();
3785
3786         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
3787                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
3788                 e_info("MSI interrupt test failed, using legacy interrupt.\n");
3789         } else {
3790                 e_dbg("MSI interrupt test succeeded!\n");
3791         }
3792
3793         free_irq(adapter->pdev->irq, netdev);
3794         pci_disable_msi(adapter->pdev);
3795
3796 msi_test_failed:
3797         e1000e_set_interrupt_capability(adapter);
3798         return e1000_request_irq(adapter);
3799 }
3800
3801 /**
3802  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
3803  * @adapter: board private struct
3804  *
3805  * code flow taken from tg3.c, called with e1000 interrupts disabled.
3806  **/
3807 static int e1000_test_msi(struct e1000_adapter *adapter)
3808 {
3809         int err;
3810         u16 pci_cmd;
3811
3812         if (!(adapter->flags & FLAG_MSI_ENABLED))
3813                 return 0;
3814
3815         /* disable SERR in case the MSI write causes a master abort */
3816         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3817         if (pci_cmd & PCI_COMMAND_SERR)
3818                 pci_write_config_word(adapter->pdev, PCI_COMMAND,
3819                                       pci_cmd & ~PCI_COMMAND_SERR);
3820
3821         err = e1000_test_msi_interrupt(adapter);
3822
3823         /* re-enable SERR */
3824         if (pci_cmd & PCI_COMMAND_SERR) {
3825                 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
3826                 pci_cmd |= PCI_COMMAND_SERR;
3827                 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
3828         }
3829
3830         return err;
3831 }
3832
3833 /**
3834  * e1000_open - Called when a network interface is made active
3835  * @netdev: network interface device structure
3836  *
3837  * Returns 0 on success, negative value on failure
3838  *
3839  * The open entry point is called when a network interface is made
3840  * active by the system (IFF_UP).  At this point all resources needed
3841  * for transmit and receive operations are allocated, the interrupt
3842  * handler is registered with the OS, the watchdog timer is started,
3843  * and the stack is notified that the interface is ready.
3844  **/
3845 static int e1000_open(struct net_device *netdev)
3846 {
3847         struct e1000_adapter *adapter = netdev_priv(netdev);
3848         struct e1000_hw *hw = &adapter->hw;
3849         struct pci_dev *pdev = adapter->pdev;
3850         int err;
3851
3852         /* disallow open during test */
3853         if (test_bit(__E1000_TESTING, &adapter->state))
3854                 return -EBUSY;
3855
3856         pm_runtime_get_sync(&pdev->dev);
3857
3858         netif_carrier_off(netdev);
3859
3860         /* allocate transmit descriptors */
3861         err = e1000e_setup_tx_resources(adapter->tx_ring);
3862         if (err)
3863                 goto err_setup_tx;
3864
3865         /* allocate receive descriptors */
3866         err = e1000e_setup_rx_resources(adapter->rx_ring);
3867         if (err)
3868                 goto err_setup_rx;
3869
3870         /*
3871          * If AMT is enabled, let the firmware know that the network
3872          * interface is now open and reset the part to a known state.
3873          */
3874         if (adapter->flags & FLAG_HAS_AMT) {
3875                 e1000e_get_hw_control(adapter);
3876                 e1000e_reset(adapter);
3877         }
3878
3879         e1000e_power_up_phy(adapter);
3880
3881         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
3882         if ((adapter->hw.mng_cookie.status &
3883              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
3884                 e1000_update_mng_vlan(adapter);
3885
3886         /* DMA latency requirement to workaround jumbo issue */
3887         if (adapter->hw.mac.type == e1000_pch2lan)
3888                 pm_qos_add_request(&adapter->netdev->pm_qos_req,
3889                                    PM_QOS_CPU_DMA_LATENCY,
3890                                    PM_QOS_DEFAULT_VALUE);
3891
3892         /*
3893          * before we allocate an interrupt, we must be ready to handle it.
3894          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
3895          * as soon as we call pci_request_irq, so we have to setup our
3896          * clean_rx handler before we do so.
3897          */
3898         e1000_configure(adapter);
3899
3900         err = e1000_request_irq(adapter);
3901         if (err)
3902                 goto err_req_irq;
3903
3904         /*
3905          * Work around PCIe errata with MSI interrupts causing some chipsets to
3906          * ignore e1000e MSI messages, which means we need to test our MSI
3907          * interrupt now
3908          */
3909         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
3910                 err = e1000_test_msi(adapter);
3911                 if (err) {
3912                         e_err("Interrupt allocation failed\n");
3913                         goto err_req_irq;
3914                 }
3915         }
3916
3917         /* From here on the code is the same as e1000e_up() */
3918         clear_bit(__E1000_DOWN, &adapter->state);
3919
3920         napi_enable(&adapter->napi);
3921
3922         e1000_irq_enable(adapter);
3923
3924         adapter->tx_hang_recheck = false;
3925         netif_start_queue(netdev);
3926
3927         adapter->idle_check = true;
3928         pm_runtime_put(&pdev->dev);
3929
3930         /* fire a link status change interrupt to start the watchdog */
3931         if (adapter->msix_entries)
3932                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3933         else
3934                 ew32(ICS, E1000_ICS_LSC);
3935
3936         return 0;
3937
3938 err_req_irq:
3939         e1000e_release_hw_control(adapter);
3940         e1000_power_down_phy(adapter);
3941         e1000e_free_rx_resources(adapter->rx_ring);
3942 err_setup_rx:
3943         e1000e_free_tx_resources(adapter->tx_ring);
3944 err_setup_tx:
3945         e1000e_reset(adapter);
3946         pm_runtime_put_sync(&pdev->dev);
3947
3948         return err;
3949 }
3950
3951 /**
3952  * e1000_close - Disables a network interface
3953  * @netdev: network interface device structure
3954  *
3955  * Returns 0, this is not allowed to fail
3956  *
3957  * The close entry point is called when an interface is de-activated
3958  * by the OS.  The hardware is still under the drivers control, but
3959  * needs to be disabled.  A global MAC reset is issued to stop the
3960  * hardware, and all transmit and receive resources are freed.
3961  **/
3962 static int e1000_close(struct net_device *netdev)
3963 {
3964         struct e1000_adapter *adapter = netdev_priv(netdev);
3965         struct pci_dev *pdev = adapter->pdev;
3966
3967         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
3968
3969         pm_runtime_get_sync(&pdev->dev);
3970
3971         napi_disable(&adapter->napi);
3972
3973         if (!test_bit(__E1000_DOWN, &adapter->state)) {
3974                 e1000e_down(adapter);
3975                 e1000_free_irq(adapter);
3976         }
3977         e1000_power_down_phy(adapter);
3978
3979         e1000e_free_tx_resources(adapter->tx_ring);
3980         e1000e_free_rx_resources(adapter->rx_ring);
3981
3982         /*
3983          * kill manageability vlan ID if supported, but not if a vlan with
3984          * the same ID is registered on the host OS (let 8021q kill it)
3985          */
3986         if (adapter->hw.mng_cookie.status &
3987             E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
3988                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
3989
3990         /*
3991          * If AMT is enabled, let the firmware know that the network
3992          * interface is now closed
3993          */
3994         if ((adapter->flags & FLAG_HAS_AMT) &&
3995             !test_bit(__E1000_TESTING, &adapter->state))
3996                 e1000e_release_hw_control(adapter);
3997
3998         if (adapter->hw.mac.type == e1000_pch2lan)
3999                 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
4000
4001         pm_runtime_put_sync(&pdev->dev);
4002
4003         return 0;
4004 }
4005 /**
4006  * e1000_set_mac - Change the Ethernet Address of the NIC
4007  * @netdev: network interface device structure
4008  * @p: pointer to an address structure
4009  *
4010  * Returns 0 on success, negative on failure
4011  **/
4012 static int e1000_set_mac(struct net_device *netdev, void *p)
4013 {
4014         struct e1000_adapter *adapter = netdev_priv(netdev);
4015         struct sockaddr *addr = p;
4016
4017         if (!is_valid_ether_addr(addr->sa_data))
4018                 return -EADDRNOTAVAIL;
4019
4020         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4021         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4022
4023         e1000e_rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
4024
4025         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4026                 /* activate the work around */
4027                 e1000e_set_laa_state_82571(&adapter->hw, 1);
4028
4029                 /*
4030                  * Hold a copy of the LAA in RAR[14] This is done so that
4031                  * between the time RAR[0] gets clobbered  and the time it
4032                  * gets fixed (in e1000_watchdog), the actual LAA is in one
4033                  * of the RARs and no incoming packets directed to this port
4034                  * are dropped. Eventually the LAA will be in RAR[0] and
4035                  * RAR[14]
4036                  */
4037                 e1000e_rar_set(&adapter->hw,
4038                               adapter->hw.mac.addr,
4039                               adapter->hw.mac.rar_entry_count - 1);
4040         }
4041
4042         return 0;
4043 }
4044
4045 /**
4046  * e1000e_update_phy_task - work thread to update phy
4047  * @work: pointer to our work struct
4048  *
4049  * this worker thread exists because we must acquire a
4050  * semaphore to read the phy, which we could msleep while
4051  * waiting for it, and we can't msleep in a timer.
4052  **/
4053 static void e1000e_update_phy_task(struct work_struct *work)
4054 {
4055         struct e1000_adapter *adapter = container_of(work,
4056                                         struct e1000_adapter, update_phy_task);
4057
4058         if (test_bit(__E1000_DOWN, &adapter->state))
4059                 return;
4060
4061         e1000_get_phy_info(&adapter->hw);
4062 }
4063
4064 /*
4065  * Need to wait a few seconds after link up to get diagnostic information from
4066  * the phy
4067  */
4068 static void e1000_update_phy_info(unsigned long data)
4069 {
4070         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4071
4072         if (test_bit(__E1000_DOWN, &adapter->state))
4073                 return;
4074
4075         schedule_work(&adapter->update_phy_task);
4076 }
4077
4078 /**
4079  * e1000e_update_phy_stats - Update the PHY statistics counters
4080  * @adapter: board private structure
4081  *
4082  * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4083  **/
4084 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4085 {
4086         struct e1000_hw *hw = &adapter->hw;
4087         s32 ret_val;
4088         u16 phy_data;
4089
4090         ret_val = hw->phy.ops.acquire(hw);
4091         if (ret_val)
4092                 return;
4093
4094         /*
4095          * A page set is expensive so check if already on desired page.
4096          * If not, set to the page with the PHY status registers.
4097          */
4098         hw->phy.addr = 1;
4099         ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4100                                            &phy_data);
4101         if (ret_val)
4102                 goto release;
4103         if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4104                 ret_val = hw->phy.ops.set_page(hw,
4105                                                HV_STATS_PAGE << IGP_PAGE_SHIFT);
4106                 if (ret_val)
4107                         goto release;
4108         }
4109
4110         /* Single Collision Count */
4111         hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4112         ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4113         if (!ret_val)
4114                 adapter->stats.scc += phy_data;
4115
4116         /* Excessive Collision Count */
4117         hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4118         ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4119         if (!ret_val)
4120                 adapter->stats.ecol += phy_data;
4121
4122         /* Multiple Collision Count */
4123         hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4124         ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4125         if (!ret_val)
4126                 adapter->stats.mcc += phy_data;
4127
4128         /* Late Collision Count */
4129         hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4130         ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4131         if (!ret_val)
4132                 adapter->stats.latecol += phy_data;
4133
4134         /* Collision Count - also used for adaptive IFS */
4135         hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4136         ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4137         if (!ret_val)
4138                 hw->mac.collision_delta = phy_data;
4139
4140         /* Defer Count */
4141         hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4142         ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4143         if (!ret_val)
4144                 adapter->stats.dc += phy_data;
4145
4146         /* Transmit with no CRS */
4147         hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4148         ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4149         if (!ret_val)
4150                 adapter->stats.tncrs += phy_data;
4151
4152 release:
4153         hw->phy.ops.release(hw);
4154 }
4155
4156 /**
4157  * e1000e_update_stats - Update the board statistics counters
4158  * @adapter: board private structure
4159  **/
4160 static void e1000e_update_stats(struct e1000_adapter *adapter)
4161 {
4162         struct net_device *netdev = adapter->netdev;
4163         struct e1000_hw *hw = &adapter->hw;
4164         struct pci_dev *pdev = adapter->pdev;
4165
4166         /*
4167          * Prevent stats update while adapter is being reset, or if the pci
4168          * connection is down.
4169          */
4170         if (adapter->link_speed == 0)
4171                 return;
4172         if (pci_channel_offline(pdev))
4173                 return;
4174
4175         adapter->stats.crcerrs += er32(CRCERRS);
4176         adapter->stats.gprc += er32(GPRC);
4177         adapter->stats.gorc += er32(GORCL);
4178         er32(GORCH); /* Clear gorc */
4179         adapter->stats.bprc += er32(BPRC);
4180         adapter->stats.mprc += er32(MPRC);
4181         adapter->stats.roc += er32(ROC);
4182
4183         adapter->stats.mpc += er32(MPC);
4184
4185         /* Half-duplex statistics */
4186         if (adapter->link_duplex == HALF_DUPLEX) {
4187                 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4188                         e1000e_update_phy_stats(adapter);
4189                 } else {
4190                         adapter->stats.scc += er32(SCC);
4191                         adapter->stats.ecol += er32(ECOL);
4192                         adapter->stats.mcc += er32(MCC);
4193                         adapter->stats.latecol += er32(LATECOL);
4194                         adapter->stats.dc += er32(DC);
4195
4196                         hw->mac.collision_delta = er32(COLC);
4197
4198                         if ((hw->mac.type != e1000_82574) &&
4199                             (hw->mac.type != e1000_82583))
4200                                 adapter->stats.tncrs += er32(TNCRS);
4201                 }
4202                 adapter->stats.colc += hw->mac.collision_delta;
4203         }
4204
4205         adapter->stats.xonrxc += er32(XONRXC);
4206         adapter->stats.xontxc += er32(XONTXC);
4207         adapter->stats.xoffrxc += er32(XOFFRXC);
4208         adapter->stats.xofftxc += er32(XOFFTXC);
4209         adapter->stats.gptc += er32(GPTC);
4210         adapter->stats.gotc += er32(GOTCL);
4211         er32(GOTCH); /* Clear gotc */
4212         adapter->stats.rnbc += er32(RNBC);
4213         adapter->stats.ruc += er32(RUC);
4214
4215         adapter->stats.mptc += er32(MPTC);
4216         adapter->stats.bptc += er32(BPTC);
4217
4218         /* used for adaptive IFS */
4219
4220         hw->mac.tx_packet_delta = er32(TPT);
4221         adapter->stats.tpt += hw->mac.tx_packet_delta;
4222
4223         adapter->stats.algnerrc += er32(ALGNERRC);
4224         adapter->stats.rxerrc += er32(RXERRC);
4225         adapter->stats.cexterr += er32(CEXTERR);
4226         adapter->stats.tsctc += er32(TSCTC);
4227         adapter->stats.tsctfc += er32(TSCTFC);
4228
4229         /* Fill out the OS statistics structure */
4230         netdev->stats.multicast = adapter->stats.mprc;
4231         netdev->stats.collisions = adapter->stats.colc;
4232
4233         /* Rx Errors */
4234
4235         /*
4236          * RLEC on some newer hardware can be incorrect so build
4237          * our own version based on RUC and ROC
4238          */
4239         netdev->stats.rx_errors = adapter->stats.rxerrc +
4240                 adapter->stats.crcerrs + adapter->stats.algnerrc +
4241                 adapter->stats.ruc + adapter->stats.roc +
4242                 adapter->stats.cexterr;
4243         netdev->stats.rx_length_errors = adapter->stats.ruc +
4244                                               adapter->stats.roc;
4245         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4246         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4247         netdev->stats.rx_missed_errors = adapter->stats.mpc;
4248
4249         /* Tx Errors */
4250         netdev->stats.tx_errors = adapter->stats.ecol +
4251                                        adapter->stats.latecol;
4252         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4253         netdev->stats.tx_window_errors = adapter->stats.latecol;
4254         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4255
4256         /* Tx Dropped needs to be maintained elsewhere */
4257
4258         /* Management Stats */
4259         adapter->stats.mgptc += er32(MGTPTC);
4260         adapter->stats.mgprc += er32(MGTPRC);
4261         adapter->stats.mgpdc += er32(MGTPDC);
4262 }
4263
4264 /**
4265  * e1000_phy_read_status - Update the PHY register status snapshot
4266  * @adapter: board private structure
4267  **/
4268 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4269 {
4270         struct e1000_hw *hw = &adapter->hw;
4271         struct e1000_phy_regs *phy = &adapter->phy_regs;
4272
4273         if ((er32(STATUS) & E1000_STATUS_LU) &&
4274             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4275                 int ret_val;
4276
4277                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
4278                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
4279                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
4280                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
4281                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
4282                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
4283                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
4284                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
4285                 if (ret_val)
4286                         e_warn("Error reading PHY register\n");
4287         } else {
4288                 /*
4289                  * Do not read PHY registers if link is not up
4290                  * Set values to typical power-on defaults
4291                  */
4292                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4293                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4294                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4295                              BMSR_ERCAP);
4296                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4297                                   ADVERTISE_ALL | ADVERTISE_CSMA);
4298                 phy->lpa = 0;
4299                 phy->expansion = EXPANSION_ENABLENPAGE;
4300                 phy->ctrl1000 = ADVERTISE_1000FULL;
4301                 phy->stat1000 = 0;
4302                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4303         }
4304 }
4305
4306 static void e1000_print_link_info(struct e1000_adapter *adapter)
4307 {
4308         struct e1000_hw *hw = &adapter->hw;
4309         u32 ctrl = er32(CTRL);
4310
4311         /* Link status message must follow this format for user tools */
4312         printk(KERN_INFO "e1000e: %s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4313                 adapter->netdev->name,
4314                 adapter->link_speed,
4315                 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4316                 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4317                 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4318                 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4319 }
4320
4321 static bool e1000e_has_link(struct e1000_adapter *adapter)
4322 {
4323         struct e1000_hw *hw = &adapter->hw;
4324         bool link_active = false;
4325         s32 ret_val = 0;
4326
4327         /*
4328          * get_link_status is set on LSC (link status) interrupt or
4329          * Rx sequence error interrupt.  get_link_status will stay
4330          * false until the check_for_link establishes link
4331          * for copper adapters ONLY
4332          */
4333         switch (hw->phy.media_type) {
4334         case e1000_media_type_copper:
4335                 if (hw->mac.get_link_status) {
4336                         ret_val = hw->mac.ops.check_for_link(hw);
4337                         link_active = !hw->mac.get_link_status;
4338                 } else {
4339                         link_active = true;
4340                 }
4341                 break;
4342         case e1000_media_type_fiber:
4343                 ret_val = hw->mac.ops.check_for_link(hw);
4344                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4345                 break;
4346         case e1000_media_type_internal_serdes:
4347                 ret_val = hw->mac.ops.check_for_link(hw);
4348                 link_active = adapter->hw.mac.serdes_has_link;
4349                 break;
4350         default:
4351         case e1000_media_type_unknown:
4352                 break;
4353         }
4354
4355         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4356             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4357                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4358                 e_info("Gigabit has been disabled, downgrading speed\n");
4359         }
4360
4361         return link_active;
4362 }
4363
4364 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4365 {
4366         /* make sure the receive unit is started */
4367         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4368             (adapter->flags & FLAG_RX_RESTART_NOW)) {
4369                 struct e1000_hw *hw = &adapter->hw;
4370                 u32 rctl = er32(RCTL);
4371                 ew32(RCTL, rctl | E1000_RCTL_EN);
4372                 adapter->flags &= ~FLAG_RX_RESTART_NOW;
4373         }
4374 }
4375
4376 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4377 {
4378         struct e1000_hw *hw = &adapter->hw;
4379
4380         /*
4381          * With 82574 controllers, PHY needs to be checked periodically
4382          * for hung state and reset, if two calls return true
4383          */
4384         if (e1000_check_phy_82574(hw))
4385                 adapter->phy_hang_count++;
4386         else
4387                 adapter->phy_hang_count = 0;
4388
4389         if (adapter->phy_hang_count > 1) {
4390                 adapter->phy_hang_count = 0;
4391                 schedule_work(&adapter->reset_task);
4392         }
4393 }
4394
4395 /**
4396  * e1000_watchdog - Timer Call-back
4397  * @data: pointer to adapter cast into an unsigned long
4398  **/
4399 static void e1000_watchdog(unsigned long data)
4400 {
4401         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4402
4403         /* Do the rest outside of interrupt context */
4404         schedule_work(&adapter->watchdog_task);
4405
4406         /* TODO: make this use queue_delayed_work() */
4407 }
4408
4409 static void e1000_watchdog_task(struct work_struct *work)
4410 {
4411         struct e1000_adapter *adapter = container_of(work,
4412                                         struct e1000_adapter, watchdog_task);
4413         struct net_device *netdev = adapter->netdev;
4414         struct e1000_mac_info *mac = &adapter->hw.mac;
4415         struct e1000_phy_info *phy = &adapter->hw.phy;
4416         struct e1000_ring *tx_ring = adapter->tx_ring;
4417         struct e1000_hw *hw = &adapter->hw;
4418         u32 link, tctl;
4419
4420         if (test_bit(__E1000_DOWN, &adapter->state))
4421                 return;
4422
4423         link = e1000e_has_link(adapter);
4424         if ((netif_carrier_ok(netdev)) && link) {
4425                 /* Cancel scheduled suspend requests. */
4426                 pm_runtime_resume(netdev->dev.parent);
4427
4428                 e1000e_enable_receives(adapter);
4429                 goto link_up;
4430         }
4431
4432         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4433             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4434                 e1000_update_mng_vlan(adapter);
4435
4436         if (link) {
4437                 if (!netif_carrier_ok(netdev)) {
4438                         bool txb2b = true;
4439
4440                         /* Cancel scheduled suspend requests. */
4441                         pm_runtime_resume(netdev->dev.parent);
4442
4443                         /* update snapshot of PHY registers on LSC */
4444                         e1000_phy_read_status(adapter);
4445                         mac->ops.get_link_up_info(&adapter->hw,
4446                                                    &adapter->link_speed,
4447                                                    &adapter->link_duplex);
4448                         e1000_print_link_info(adapter);
4449                         /*
4450                          * On supported PHYs, check for duplex mismatch only
4451                          * if link has autonegotiated at 10/100 half
4452                          */
4453                         if ((hw->phy.type == e1000_phy_igp_3 ||
4454                              hw->phy.type == e1000_phy_bm) &&
4455                             (hw->mac.autoneg == true) &&
4456                             (adapter->link_speed == SPEED_10 ||
4457                              adapter->link_speed == SPEED_100) &&
4458                             (adapter->link_duplex == HALF_DUPLEX)) {
4459                                 u16 autoneg_exp;
4460
4461                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
4462
4463                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
4464                                         e_info("Autonegotiated half duplex but link partner cannot autoneg.  Try forcing full duplex if link gets many collisions.\n");
4465                         }
4466
4467                         /* adjust timeout factor according to speed/duplex */
4468                         adapter->tx_timeout_factor = 1;
4469                         switch (adapter->link_speed) {
4470                         case SPEED_10:
4471                                 txb2b = false;
4472                                 adapter->tx_timeout_factor = 16;
4473                                 break;
4474                         case SPEED_100:
4475                                 txb2b = false;
4476                                 adapter->tx_timeout_factor = 10;
4477                                 break;
4478                         }
4479
4480                         /*
4481                          * workaround: re-program speed mode bit after
4482                          * link-up event
4483                          */
4484                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4485                             !txb2b) {
4486                                 u32 tarc0;
4487                                 tarc0 = er32(TARC(0));
4488                                 tarc0 &= ~SPEED_MODE_BIT;
4489                                 ew32(TARC(0), tarc0);
4490                         }
4491
4492                         /*
4493                          * disable TSO for pcie and 10/100 speeds, to avoid
4494                          * some hardware issues
4495                          */
4496                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4497                                 switch (adapter->link_speed) {
4498                                 case SPEED_10:
4499                                 case SPEED_100:
4500                                         e_info("10/100 speed: disabling TSO\n");
4501                                         netdev->features &= ~NETIF_F_TSO;
4502                                         netdev->features &= ~NETIF_F_TSO6;
4503                                         break;
4504                                 case SPEED_1000:
4505                                         netdev->features |= NETIF_F_TSO;
4506                                         netdev->features |= NETIF_F_TSO6;
4507                                         break;
4508                                 default:
4509                                         /* oops */
4510                                         break;
4511                                 }
4512                         }
4513
4514                         /*
4515                          * enable transmits in the hardware, need to do this
4516                          * after setting TARC(0)
4517                          */
4518                         tctl = er32(TCTL);
4519                         tctl |= E1000_TCTL_EN;
4520                         ew32(TCTL, tctl);
4521
4522                         /*
4523                          * Perform any post-link-up configuration before
4524                          * reporting link up.
4525                          */
4526                         if (phy->ops.cfg_on_link_up)
4527                                 phy->ops.cfg_on_link_up(hw);
4528
4529                         netif_carrier_on(netdev);
4530
4531                         if (!test_bit(__E1000_DOWN, &adapter->state))
4532                                 mod_timer(&adapter->phy_info_timer,
4533                                           round_jiffies(jiffies + 2 * HZ));
4534                 }
4535         } else {
4536                 if (netif_carrier_ok(netdev)) {
4537                         adapter->link_speed = 0;
4538                         adapter->link_duplex = 0;
4539                         /* Link status message must follow this format */
4540                         printk(KERN_INFO "e1000e: %s NIC Link is Down\n",
4541                                adapter->netdev->name);
4542                         netif_carrier_off(netdev);
4543                         if (!test_bit(__E1000_DOWN, &adapter->state))
4544                                 mod_timer(&adapter->phy_info_timer,
4545                                           round_jiffies(jiffies + 2 * HZ));
4546
4547                         if (adapter->flags & FLAG_RX_NEEDS_RESTART)
4548                                 schedule_work(&adapter->reset_task);
4549                         else
4550                                 pm_schedule_suspend(netdev->dev.parent,
4551                                                         LINK_TIMEOUT);
4552                 }
4553         }
4554
4555 link_up:
4556         spin_lock(&adapter->stats64_lock);
4557         e1000e_update_stats(adapter);
4558
4559         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4560         adapter->tpt_old = adapter->stats.tpt;
4561         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4562         adapter->colc_old = adapter->stats.colc;
4563
4564         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4565         adapter->gorc_old = adapter->stats.gorc;
4566         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4567         adapter->gotc_old = adapter->stats.gotc;
4568         spin_unlock(&adapter->stats64_lock);
4569
4570         e1000e_update_adaptive(&adapter->hw);
4571
4572         if (!netif_carrier_ok(netdev) &&
4573             (e1000_desc_unused(tx_ring) + 1 < tx_ring->count)) {
4574                 /*
4575                  * We've lost link, so the controller stops DMA,
4576                  * but we've got queued Tx work that's never going
4577                  * to get done, so reset controller to flush Tx.
4578                  * (Do the reset outside of interrupt context).
4579                  */
4580                 schedule_work(&adapter->reset_task);
4581                 /* return immediately since reset is imminent */
4582                 return;
4583         }
4584
4585         /* Simple mode for Interrupt Throttle Rate (ITR) */
4586         if (adapter->itr_setting == 4) {
4587                 /*
4588                  * Symmetric Tx/Rx gets a reduced ITR=2000;
4589                  * Total asymmetrical Tx or Rx gets ITR=8000;
4590                  * everyone else is between 2000-8000.
4591                  */
4592                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4593                 u32 dif = (adapter->gotc > adapter->gorc ?
4594                             adapter->gotc - adapter->gorc :
4595                             adapter->gorc - adapter->gotc) / 10000;
4596                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4597
4598                 ew32(ITR, 1000000000 / (itr * 256));
4599         }
4600
4601         /* Cause software interrupt to ensure Rx ring is cleaned */
4602         if (adapter->msix_entries)
4603                 ew32(ICS, adapter->rx_ring->ims_val);
4604         else
4605                 ew32(ICS, E1000_ICS_RXDMT0);
4606
4607         /* flush pending descriptors to memory before detecting Tx hang */
4608         e1000e_flush_descriptors(adapter);
4609
4610         /* Force detection of hung controller every watchdog period */
4611         adapter->detect_tx_hung = true;
4612
4613         /*
4614          * With 82571 controllers, LAA may be overwritten due to controller
4615          * reset from the other port. Set the appropriate LAA in RAR[0]
4616          */
4617         if (e1000e_get_laa_state_82571(hw))
4618                 e1000e_rar_set(hw, adapter->hw.mac.addr, 0);
4619
4620         if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
4621                 e1000e_check_82574_phy_workaround(adapter);
4622
4623         /* Reset the timer */
4624         if (!test_bit(__E1000_DOWN, &adapter->state))
4625                 mod_timer(&adapter->watchdog_timer,
4626                           round_jiffies(jiffies + 2 * HZ));
4627 }
4628
4629 #define E1000_TX_FLAGS_CSUM             0x00000001
4630 #define E1000_TX_FLAGS_VLAN             0x00000002
4631 #define E1000_TX_FLAGS_TSO              0x00000004
4632 #define E1000_TX_FLAGS_IPV4             0x00000008
4633 #define E1000_TX_FLAGS_NO_FCS           0x00000010
4634 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
4635 #define E1000_TX_FLAGS_VLAN_SHIFT       16
4636
4637 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
4638 {
4639         struct e1000_context_desc *context_desc;
4640         struct e1000_buffer *buffer_info;
4641         unsigned int i;
4642         u32 cmd_length = 0;
4643         u16 ipcse = 0, tucse, mss;
4644         u8 ipcss, ipcso, tucss, tucso, hdr_len;
4645
4646         if (!skb_is_gso(skb))
4647                 return 0;
4648
4649         if (skb_header_cloned(skb)) {
4650                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
4651
4652                 if (err)
4653                         return err;
4654         }
4655
4656         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
4657         mss = skb_shinfo(skb)->gso_size;
4658         if (skb->protocol == htons(ETH_P_IP)) {
4659                 struct iphdr *iph = ip_hdr(skb);
4660                 iph->tot_len = 0;
4661                 iph->check = 0;
4662                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
4663                                                          0, IPPROTO_TCP, 0);
4664                 cmd_length = E1000_TXD_CMD_IP;
4665                 ipcse = skb_transport_offset(skb) - 1;
4666         } else if (skb_is_gso_v6(skb)) {
4667                 ipv6_hdr(skb)->payload_len = 0;
4668                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
4669                                                        &ipv6_hdr(skb)->daddr,
4670                                                        0, IPPROTO_TCP, 0);
4671                 ipcse = 0;
4672         }
4673         ipcss = skb_network_offset(skb);
4674         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
4675         tucss = skb_transport_offset(skb);
4676         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
4677         tucse = 0;
4678
4679         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
4680                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
4681
4682         i = tx_ring->next_to_use;
4683         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4684         buffer_info = &tx_ring->buffer_info[i];
4685
4686         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
4687         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
4688         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
4689         context_desc->upper_setup.tcp_fields.tucss = tucss;
4690         context_desc->upper_setup.tcp_fields.tucso = tucso;
4691         context_desc->upper_setup.tcp_fields.tucse = cpu_to_le16(tucse);
4692         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
4693         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
4694         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
4695
4696         buffer_info->time_stamp = jiffies;
4697         buffer_info->next_to_watch = i;
4698
4699         i++;
4700         if (i == tx_ring->count)
4701                 i = 0;
4702         tx_ring->next_to_use = i;
4703
4704         return 1;
4705 }
4706
4707 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
4708 {
4709         struct e1000_adapter *adapter = tx_ring->adapter;
4710         struct e1000_context_desc *context_desc;
4711         struct e1000_buffer *buffer_info;
4712         unsigned int i;
4713         u8 css;
4714         u32 cmd_len = E1000_TXD_CMD_DEXT;
4715         __be16 protocol;
4716
4717         if (skb->ip_summed != CHECKSUM_PARTIAL)
4718                 return 0;
4719
4720         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
4721                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
4722         else
4723                 protocol = skb->protocol;
4724
4725         switch (protocol) {
4726         case cpu_to_be16(ETH_P_IP):
4727                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
4728                         cmd_len |= E1000_TXD_CMD_TCP;
4729                 break;
4730         case cpu_to_be16(ETH_P_IPV6):
4731                 /* XXX not handling all IPV6 headers */
4732                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
4733                         cmd_len |= E1000_TXD_CMD_TCP;
4734                 break;
4735         default:
4736                 if (unlikely(net_ratelimit()))
4737                         e_warn("checksum_partial proto=%x!\n",
4738                                be16_to_cpu(protocol));
4739                 break;
4740         }
4741
4742         css = skb_checksum_start_offset(skb);
4743
4744         i = tx_ring->next_to_use;
4745         buffer_info = &tx_ring->buffer_info[i];
4746         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
4747
4748         context_desc->lower_setup.ip_config = 0;
4749         context_desc->upper_setup.tcp_fields.tucss = css;
4750         context_desc->upper_setup.tcp_fields.tucso =
4751                                 css + skb->csum_offset;
4752         context_desc->upper_setup.tcp_fields.tucse = 0;
4753         context_desc->tcp_seg_setup.data = 0;
4754         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
4755
4756         buffer_info->time_stamp = jiffies;
4757         buffer_info->next_to_watch = i;
4758
4759         i++;
4760         if (i == tx_ring->count)
4761                 i = 0;
4762         tx_ring->next_to_use = i;
4763
4764         return 1;
4765 }
4766
4767 #define E1000_MAX_PER_TXD       8192
4768 #define E1000_MAX_TXD_PWR       12
4769
4770 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
4771                         unsigned int first, unsigned int max_per_txd,
4772                         unsigned int nr_frags, unsigned int mss)
4773 {
4774         struct e1000_adapter *adapter = tx_ring->adapter;
4775         struct pci_dev *pdev = adapter->pdev;
4776         struct e1000_buffer *buffer_info;
4777         unsigned int len = skb_headlen(skb);
4778         unsigned int offset = 0, size, count = 0, i;
4779         unsigned int f, bytecount, segs;
4780
4781         i = tx_ring->next_to_use;
4782
4783         while (len) {
4784                 buffer_info = &tx_ring->buffer_info[i];
4785                 size = min(len, max_per_txd);
4786
4787                 buffer_info->length = size;
4788                 buffer_info->time_stamp = jiffies;
4789                 buffer_info->next_to_watch = i;
4790                 buffer_info->dma = dma_map_single(&pdev->dev,
4791                                                   skb->data + offset,
4792                                                   size, DMA_TO_DEVICE);
4793                 buffer_info->mapped_as_page = false;
4794                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4795                         goto dma_error;
4796
4797                 len -= size;
4798                 offset += size;
4799                 count++;
4800
4801                 if (len) {
4802                         i++;
4803                         if (i == tx_ring->count)
4804                                 i = 0;
4805                 }
4806         }
4807
4808         for (f = 0; f < nr_frags; f++) {
4809                 const struct skb_frag_struct *frag;
4810
4811                 frag = &skb_shinfo(skb)->frags[f];
4812                 len = skb_frag_size(frag);
4813                 offset = 0;
4814
4815                 while (len) {
4816                         i++;
4817                         if (i == tx_ring->count)
4818                                 i = 0;
4819
4820                         buffer_info = &tx_ring->buffer_info[i];
4821                         size = min(len, max_per_txd);
4822
4823                         buffer_info->length = size;
4824                         buffer_info->time_stamp = jiffies;
4825                         buffer_info->next_to_watch = i;
4826                         buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
4827                                                 offset, size, DMA_TO_DEVICE);
4828                         buffer_info->mapped_as_page = true;
4829                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
4830                                 goto dma_error;
4831
4832                         len -= size;
4833                         offset += size;
4834                         count++;
4835                 }
4836         }
4837
4838         segs = skb_shinfo(skb)->gso_segs ? : 1;
4839         /* multiply data chunks by size of headers */
4840         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
4841
4842         tx_ring->buffer_info[i].skb = skb;
4843         tx_ring->buffer_info[i].segs = segs;
4844         tx_ring->buffer_info[i].bytecount = bytecount;
4845         tx_ring->buffer_info[first].next_to_watch = i;
4846
4847         return count;
4848
4849 dma_error:
4850         dev_err(&pdev->dev, "Tx DMA map failed\n");
4851         buffer_info->dma = 0;
4852         if (count)
4853                 count--;
4854
4855         while (count--) {
4856                 if (i == 0)
4857                         i += tx_ring->count;
4858                 i--;
4859                 buffer_info = &tx_ring->buffer_info[i];
4860                 e1000_put_txbuf(tx_ring, buffer_info);
4861         }
4862
4863         return 0;
4864 }
4865
4866 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
4867 {
4868         struct e1000_adapter *adapter = tx_ring->adapter;
4869         struct e1000_tx_desc *tx_desc = NULL;
4870         struct e1000_buffer *buffer_info;
4871         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
4872         unsigned int i;
4873
4874         if (tx_flags & E1000_TX_FLAGS_TSO) {
4875                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
4876                              E1000_TXD_CMD_TSE;
4877                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4878
4879                 if (tx_flags & E1000_TX_FLAGS_IPV4)
4880                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
4881         }
4882
4883         if (tx_flags & E1000_TX_FLAGS_CSUM) {
4884                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
4885                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
4886         }
4887
4888         if (tx_flags & E1000_TX_FLAGS_VLAN) {
4889                 txd_lower |= E1000_TXD_CMD_VLE;
4890                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
4891         }
4892
4893         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
4894                 txd_lower &= ~(E1000_TXD_CMD_IFCS);
4895
4896         i = tx_ring->next_to_use;
4897
4898         do {
4899                 buffer_info = &tx_ring->buffer_info[i];
4900                 tx_desc = E1000_TX_DESC(*tx_ring, i);
4901                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
4902                 tx_desc->lower.data =
4903                         cpu_to_le32(txd_lower | buffer_info->length);
4904                 tx_desc->upper.data = cpu_to_le32(txd_upper);
4905
4906                 i++;
4907                 if (i == tx_ring->count)
4908                         i = 0;
4909         } while (--count > 0);
4910
4911         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
4912
4913         /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
4914         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
4915                 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
4916
4917         /*
4918          * Force memory writes to complete before letting h/w
4919          * know there are new descriptors to fetch.  (Only
4920          * applicable for weak-ordered memory model archs,
4921          * such as IA-64).
4922          */
4923         wmb();
4924
4925         tx_ring->next_to_use = i;
4926
4927         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
4928                 e1000e_update_tdt_wa(tx_ring, i);
4929         else
4930                 writel(i, tx_ring->tail);
4931
4932         /*
4933          * we need this if more than one processor can write to our tail
4934          * at a time, it synchronizes IO on IA64/Altix systems
4935          */
4936         mmiowb();
4937 }
4938
4939 #define MINIMUM_DHCP_PACKET_SIZE 282
4940 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
4941                                     struct sk_buff *skb)
4942 {
4943         struct e1000_hw *hw =  &adapter->hw;
4944         u16 length, offset;
4945
4946         if (vlan_tx_tag_present(skb)) {
4947                 if (!((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
4948                     (adapter->hw.mng_cookie.status &
4949                         E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
4950                         return 0;
4951         }
4952
4953         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
4954                 return 0;
4955
4956         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
4957                 return 0;
4958
4959         {
4960                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
4961                 struct udphdr *udp;
4962
4963                 if (ip->protocol != IPPROTO_UDP)
4964                         return 0;
4965
4966                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
4967                 if (ntohs(udp->dest) != 67)
4968                         return 0;
4969
4970                 offset = (u8 *)udp + 8 - skb->data;
4971                 length = skb->len - offset;
4972                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
4973         }
4974
4975         return 0;
4976 }
4977
4978 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
4979 {
4980         struct e1000_adapter *adapter = tx_ring->adapter;
4981
4982         netif_stop_queue(adapter->netdev);
4983         /*
4984          * Herbert's original patch had:
4985          *  smp_mb__after_netif_stop_queue();
4986          * but since that doesn't exist yet, just open code it.
4987          */
4988         smp_mb();
4989
4990         /*
4991          * We need to check again in a case another CPU has just
4992          * made room available.
4993          */
4994         if (e1000_desc_unused(tx_ring) < size)
4995                 return -EBUSY;
4996
4997         /* A reprieve! */
4998         netif_start_queue(adapter->netdev);
4999         ++adapter->restart_queue;
5000         return 0;
5001 }
5002
5003 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5004 {
5005         if (e1000_desc_unused(tx_ring) >= size)
5006                 return 0;
5007         return __e1000_maybe_stop_tx(tx_ring, size);
5008 }
5009
5010 #define TXD_USE_COUNT(S, X) (((S) >> (X)) + 1)
5011 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5012                                     struct net_device *netdev)
5013 {
5014         struct e1000_adapter *adapter = netdev_priv(netdev);
5015         struct e1000_ring *tx_ring = adapter->tx_ring;
5016         unsigned int first;
5017         unsigned int max_per_txd = E1000_MAX_PER_TXD;
5018         unsigned int max_txd_pwr = E1000_MAX_TXD_PWR;
5019         unsigned int tx_flags = 0;
5020         unsigned int len = skb_headlen(skb);
5021         unsigned int nr_frags;
5022         unsigned int mss;
5023         int count = 0;
5024         int tso;
5025         unsigned int f;
5026
5027         if (test_bit(__E1000_DOWN, &adapter->state)) {
5028                 dev_kfree_skb_any(skb);
5029                 return NETDEV_TX_OK;
5030         }
5031
5032         if (skb->len <= 0) {
5033                 dev_kfree_skb_any(skb);
5034                 return NETDEV_TX_OK;
5035         }
5036
5037         mss = skb_shinfo(skb)->gso_size;
5038         /*
5039          * The controller does a simple calculation to
5040          * make sure there is enough room in the FIFO before
5041          * initiating the DMA for each buffer.  The calc is:
5042          * 4 = ceil(buffer len/mss).  To make sure we don't
5043          * overrun the FIFO, adjust the max buffer len if mss
5044          * drops.
5045          */
5046         if (mss) {
5047                 u8 hdr_len;
5048                 max_per_txd = min(mss << 2, max_per_txd);
5049                 max_txd_pwr = fls(max_per_txd) - 1;
5050
5051                 /*
5052                  * TSO Workaround for 82571/2/3 Controllers -- if skb->data
5053                  * points to just header, pull a few bytes of payload from
5054                  * frags into skb->data
5055                  */
5056                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5057                 /*
5058                  * we do this workaround for ES2LAN, but it is un-necessary,
5059                  * avoiding it could save a lot of cycles
5060                  */
5061                 if (skb->data_len && (hdr_len == len)) {
5062                         unsigned int pull_size;
5063
5064                         pull_size = min_t(unsigned int, 4, skb->data_len);
5065                         if (!__pskb_pull_tail(skb, pull_size)) {
5066                                 e_err("__pskb_pull_tail failed.\n");
5067                                 dev_kfree_skb_any(skb);
5068                                 return NETDEV_TX_OK;
5069                         }
5070                         len = skb_headlen(skb);
5071                 }
5072         }
5073
5074         /* reserve a descriptor for the offload context */
5075         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5076                 count++;
5077         count++;
5078
5079         count += TXD_USE_COUNT(len, max_txd_pwr);
5080
5081         nr_frags = skb_shinfo(skb)->nr_frags;
5082         for (f = 0; f < nr_frags; f++)
5083                 count += TXD_USE_COUNT(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5084                                        max_txd_pwr);
5085
5086         if (adapter->hw.mac.tx_pkt_filtering)
5087                 e1000_transfer_dhcp_info(adapter, skb);
5088
5089         /*
5090          * need: count + 2 desc gap to keep tail from touching
5091          * head, otherwise try next time
5092          */
5093         if (e1000_maybe_stop_tx(tx_ring, count + 2))
5094                 return NETDEV_TX_BUSY;
5095
5096         if (vlan_tx_tag_present(skb)) {
5097                 tx_flags |= E1000_TX_FLAGS_VLAN;
5098                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5099         }
5100
5101         first = tx_ring->next_to_use;
5102
5103         tso = e1000_tso(tx_ring, skb);
5104         if (tso < 0) {
5105                 dev_kfree_skb_any(skb);
5106                 return NETDEV_TX_OK;
5107         }
5108
5109         if (tso)
5110                 tx_flags |= E1000_TX_FLAGS_TSO;
5111         else if (e1000_tx_csum(tx_ring, skb))
5112                 tx_flags |= E1000_TX_FLAGS_CSUM;
5113
5114         /*
5115          * Old method was to assume IPv4 packet by default if TSO was enabled.
5116          * 82571 hardware supports TSO capabilities for IPv6 as well...
5117          * no longer assume, we must.
5118          */
5119         if (skb->protocol == htons(ETH_P_IP))
5120                 tx_flags |= E1000_TX_FLAGS_IPV4;
5121
5122         if (unlikely(skb->no_fcs))
5123                 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5124
5125         /* if count is 0 then mapping error has occurred */
5126         count = e1000_tx_map(tx_ring, skb, first, max_per_txd, nr_frags, mss);
5127         if (count) {
5128                 netdev_sent_queue(netdev, skb->len);
5129                 e1000_tx_queue(tx_ring, tx_flags, count);
5130                 /* Make sure there is space in the ring for the next send. */
5131                 e1000_maybe_stop_tx(tx_ring, MAX_SKB_FRAGS + 2);
5132
5133         } else {
5134                 dev_kfree_skb_any(skb);
5135                 tx_ring->buffer_info[first].time_stamp = 0;
5136                 tx_ring->next_to_use = first;
5137         }
5138
5139         return NETDEV_TX_OK;
5140 }
5141
5142 /**
5143  * e1000_tx_timeout - Respond to a Tx Hang
5144  * @netdev: network interface device structure
5145  **/
5146 static void e1000_tx_timeout(struct net_device *netdev)
5147 {
5148         struct e1000_adapter *adapter = netdev_priv(netdev);
5149
5150         /* Do the reset outside of interrupt context */
5151         adapter->tx_timeout_count++;
5152         schedule_work(&adapter->reset_task);
5153 }
5154
5155 static void e1000_reset_task(struct work_struct *work)
5156 {
5157         struct e1000_adapter *adapter;
5158         adapter = container_of(work, struct e1000_adapter, reset_task);
5159
5160         /* don't run the task if already down */
5161         if (test_bit(__E1000_DOWN, &adapter->state))
5162                 return;
5163
5164         if (!((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
5165               (adapter->flags & FLAG_RX_RESTART_NOW))) {
5166                 e1000e_dump(adapter);
5167                 e_err("Reset adapter\n");
5168         }
5169         e1000e_reinit_locked(adapter);
5170 }
5171
5172 /**
5173  * e1000_get_stats64 - Get System Network Statistics
5174  * @netdev: network interface device structure
5175  * @stats: rtnl_link_stats64 pointer
5176  *
5177  * Returns the address of the device statistics structure.
5178  **/
5179 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5180                                              struct rtnl_link_stats64 *stats)
5181 {
5182         struct e1000_adapter *adapter = netdev_priv(netdev);
5183
5184         memset(stats, 0, sizeof(struct rtnl_link_stats64));
5185         spin_lock(&adapter->stats64_lock);
5186         e1000e_update_stats(adapter);
5187         /* Fill out the OS statistics structure */
5188         stats->rx_bytes = adapter->stats.gorc;
5189         stats->rx_packets = adapter->stats.gprc;
5190         stats->tx_bytes = adapter->stats.gotc;
5191         stats->tx_packets = adapter->stats.gptc;
5192         stats->multicast = adapter->stats.mprc;
5193         stats->collisions = adapter->stats.colc;
5194
5195         /* Rx Errors */
5196
5197         /*
5198          * RLEC on some newer hardware can be incorrect so build
5199          * our own version based on RUC and ROC
5200          */
5201         stats->rx_errors = adapter->stats.rxerrc +
5202                 adapter->stats.crcerrs + adapter->stats.algnerrc +
5203                 adapter->stats.ruc + adapter->stats.roc +
5204                 adapter->stats.cexterr;
5205         stats->rx_length_errors = adapter->stats.ruc +
5206                                               adapter->stats.roc;
5207         stats->rx_crc_errors = adapter->stats.crcerrs;
5208         stats->rx_frame_errors = adapter->stats.algnerrc;
5209         stats->rx_missed_errors = adapter->stats.mpc;
5210
5211         /* Tx Errors */
5212         stats->tx_errors = adapter->stats.ecol +
5213                                        adapter->stats.latecol;
5214         stats->tx_aborted_errors = adapter->stats.ecol;
5215         stats->tx_window_errors = adapter->stats.latecol;
5216         stats->tx_carrier_errors = adapter->stats.tncrs;
5217
5218         /* Tx Dropped needs to be maintained elsewhere */
5219
5220         spin_unlock(&adapter->stats64_lock);
5221         return stats;
5222 }
5223
5224 /**
5225  * e1000_change_mtu - Change the Maximum Transfer Unit
5226  * @netdev: network interface device structure
5227  * @new_mtu: new value for maximum frame size
5228  *
5229  * Returns 0 on success, negative on failure
5230  **/
5231 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5232 {
5233         struct e1000_adapter *adapter = netdev_priv(netdev);
5234         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5235
5236         /* Jumbo frame support */
5237         if (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) {
5238                 if (!(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5239                         e_err("Jumbo Frames not supported.\n");
5240                         return -EINVAL;
5241                 }
5242
5243                 /*
5244                  * IP payload checksum (enabled with jumbos/packet-split when
5245                  * Rx checksum is enabled) and generation of RSS hash is
5246                  * mutually exclusive in the hardware.
5247                  */
5248                 if ((netdev->features & NETIF_F_RXCSUM) &&
5249                     (netdev->features & NETIF_F_RXHASH)) {
5250                         e_err("Jumbo frames cannot be enabled when both receive checksum offload and receive hashing are enabled.  Disable one of the receive offload features before enabling jumbos.\n");
5251                         return -EINVAL;
5252                 }
5253         }
5254
5255         /* Supported frame sizes */
5256         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5257             (max_frame > adapter->max_hw_frame_size)) {
5258                 e_err("Unsupported MTU setting\n");
5259                 return -EINVAL;
5260         }
5261
5262         /* Jumbo frame workaround on 82579 requires CRC be stripped */
5263         if ((adapter->hw.mac.type == e1000_pch2lan) &&
5264             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5265             (new_mtu > ETH_DATA_LEN)) {
5266                 e_err("Jumbo Frames not supported on 82579 when CRC stripping is disabled.\n");
5267                 return -EINVAL;
5268         }
5269
5270         /* 82573 Errata 17 */
5271         if (((adapter->hw.mac.type == e1000_82573) ||
5272              (adapter->hw.mac.type == e1000_82574)) &&
5273             (max_frame > ETH_FRAME_LEN + ETH_FCS_LEN)) {
5274                 adapter->flags2 |= FLAG2_DISABLE_ASPM_L1;
5275                 e1000e_disable_aspm(adapter->pdev, PCIE_LINK_STATE_L1);
5276         }
5277
5278         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5279                 usleep_range(1000, 2000);
5280         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5281         adapter->max_frame_size = max_frame;
5282         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5283         netdev->mtu = new_mtu;
5284         if (netif_running(netdev))
5285                 e1000e_down(adapter);
5286
5287         /*
5288          * NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5289          * means we reserve 2 more, this pushes us to allocate from the next
5290          * larger slab size.
5291          * i.e. RXBUFFER_2048 --> size-4096 slab
5292          * However with the new *_jumbo_rx* routines, jumbo receives will use
5293          * fragmented skbs
5294          */
5295
5296         if (max_frame <= 2048)
5297                 adapter->rx_buffer_len = 2048;
5298         else
5299                 adapter->rx_buffer_len = 4096;
5300
5301         /* adjust allocation if LPE protects us, and we aren't using SBP */
5302         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5303              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5304                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5305                                          + ETH_FCS_LEN;
5306
5307         if (netif_running(netdev))
5308                 e1000e_up(adapter);
5309         else
5310                 e1000e_reset(adapter);
5311
5312         clear_bit(__E1000_RESETTING, &adapter->state);
5313
5314         return 0;
5315 }
5316
5317 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5318                            int cmd)
5319 {
5320         struct e1000_adapter *adapter = netdev_priv(netdev);
5321         struct mii_ioctl_data *data = if_mii(ifr);
5322
5323         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5324                 return -EOPNOTSUPP;
5325
5326         switch (cmd) {
5327         case SIOCGMIIPHY:
5328                 data->phy_id = adapter->hw.phy.addr;
5329                 break;
5330         case SIOCGMIIREG:
5331                 e1000_phy_read_status(adapter);
5332
5333                 switch (data->reg_num & 0x1F) {
5334                 case MII_BMCR:
5335                         data->val_out = adapter->phy_regs.bmcr;
5336                         break;
5337                 case MII_BMSR:
5338                         data->val_out = adapter->phy_regs.bmsr;
5339                         break;
5340                 case MII_PHYSID1:
5341                         data->val_out = (adapter->hw.phy.id >> 16);
5342                         break;
5343                 case MII_PHYSID2:
5344                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
5345                         break;
5346                 case MII_ADVERTISE:
5347                         data->val_out = adapter->phy_regs.advertise;
5348                         break;
5349                 case MII_LPA:
5350                         data->val_out = adapter->phy_regs.lpa;
5351                         break;
5352                 case MII_EXPANSION:
5353                         data->val_out = adapter->phy_regs.expansion;
5354                         break;
5355                 case MII_CTRL1000:
5356                         data->val_out = adapter->phy_regs.ctrl1000;
5357                         break;
5358                 case MII_STAT1000:
5359                         data->val_out = adapter->phy_regs.stat1000;
5360                         break;
5361                 case MII_ESTATUS:
5362                         data->val_out = adapter->phy_regs.estatus;
5363                         break;
5364                 default:
5365                         return -EIO;
5366                 }
5367                 break;
5368         case SIOCSMIIREG:
5369         default:
5370                 return -EOPNOTSUPP;
5371         }
5372         return 0;
5373 }
5374
5375 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5376 {
5377         switch (cmd) {
5378         case SIOCGMIIPHY:
5379         case SIOCGMIIREG:
5380         case SIOCSMIIREG:
5381                 return e1000_mii_ioctl(netdev, ifr, cmd);
5382         default:
5383                 return -EOPNOTSUPP;
5384         }
5385 }
5386
5387 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5388 {
5389         struct e1000_hw *hw = &adapter->hw;
5390         u32 i, mac_reg;
5391         u16 phy_reg, wuc_enable;
5392         int retval = 0;
5393
5394         /* copy MAC RARs to PHY RARs */
5395         e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5396
5397         retval = hw->phy.ops.acquire(hw);
5398         if (retval) {
5399                 e_err("Could not acquire PHY\n");
5400                 return retval;
5401         }
5402
5403         /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5404         retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5405         if (retval)
5406                 goto release;
5407
5408         /* copy MAC MTA to PHY MTA - only needed for pchlan */
5409         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5410                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5411                 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5412                                            (u16)(mac_reg & 0xFFFF));
5413                 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5414                                            (u16)((mac_reg >> 16) & 0xFFFF));
5415         }
5416
5417         /* configure PHY Rx Control register */
5418         hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5419         mac_reg = er32(RCTL);
5420         if (mac_reg & E1000_RCTL_UPE)
5421                 phy_reg |= BM_RCTL_UPE;
5422         if (mac_reg & E1000_RCTL_MPE)
5423                 phy_reg |= BM_RCTL_MPE;
5424         phy_reg &= ~(BM_RCTL_MO_MASK);
5425         if (mac_reg & E1000_RCTL_MO_3)
5426                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5427                                 << BM_RCTL_MO_SHIFT);
5428         if (mac_reg & E1000_RCTL_BAM)
5429                 phy_reg |= BM_RCTL_BAM;
5430         if (mac_reg & E1000_RCTL_PMCF)
5431                 phy_reg |= BM_RCTL_PMCF;
5432         mac_reg = er32(CTRL);
5433         if (mac_reg & E1000_CTRL_RFCE)
5434                 phy_reg |= BM_RCTL_RFCE;
5435         hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5436
5437         /* enable PHY wakeup in MAC register */
5438         ew32(WUFC, wufc);
5439         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5440
5441         /* configure and enable PHY wakeup in PHY registers */
5442         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5443         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5444
5445         /* activate PHY wakeup */
5446         wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5447         retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5448         if (retval)
5449                 e_err("Could not set PHY Host Wakeup bit\n");
5450 release:
5451         hw->phy.ops.release(hw);
5452
5453         return retval;
5454 }
5455
5456 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
5457                             bool runtime)
5458 {
5459         struct net_device *netdev = pci_get_drvdata(pdev);
5460         struct e1000_adapter *adapter = netdev_priv(netdev);
5461         struct e1000_hw *hw = &adapter->hw;
5462         u32 ctrl, ctrl_ext, rctl, status;
5463         /* Runtime suspend should only enable wakeup for link changes */
5464         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5465         int retval = 0;
5466
5467         netif_device_detach(netdev);
5468
5469         if (netif_running(netdev)) {
5470                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5471                 e1000e_down(adapter);
5472                 e1000_free_irq(adapter);
5473         }
5474         e1000e_reset_interrupt_capability(adapter);
5475
5476         retval = pci_save_state(pdev);
5477         if (retval)
5478                 return retval;
5479
5480         status = er32(STATUS);
5481         if (status & E1000_STATUS_LU)
5482                 wufc &= ~E1000_WUFC_LNKC;
5483
5484         if (wufc) {
5485                 e1000_setup_rctl(adapter);
5486                 e1000e_set_rx_mode(netdev);
5487
5488                 /* turn on all-multi mode if wake on multicast is enabled */
5489                 if (wufc & E1000_WUFC_MC) {
5490                         rctl = er32(RCTL);
5491                         rctl |= E1000_RCTL_MPE;
5492                         ew32(RCTL, rctl);
5493                 }
5494
5495                 ctrl = er32(CTRL);
5496                 /* advertise wake from D3Cold */
5497                 #define E1000_CTRL_ADVD3WUC 0x00100000
5498                 /* phy power management enable */
5499                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5500                 ctrl |= E1000_CTRL_ADVD3WUC;
5501                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5502                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5503                 ew32(CTRL, ctrl);
5504
5505                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5506                     adapter->hw.phy.media_type ==
5507                     e1000_media_type_internal_serdes) {
5508                         /* keep the laser running in D3 */
5509                         ctrl_ext = er32(CTRL_EXT);
5510                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5511                         ew32(CTRL_EXT, ctrl_ext);
5512                 }
5513
5514                 if (adapter->flags & FLAG_IS_ICH)
5515                         e1000_suspend_workarounds_ich8lan(&adapter->hw);
5516
5517                 /* Allow time for pending master requests to run */
5518                 e1000e_disable_pcie_master(&adapter->hw);
5519
5520                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5521                         /* enable wakeup by the PHY */
5522                         retval = e1000_init_phy_wakeup(adapter, wufc);
5523                         if (retval)
5524                                 return retval;
5525                 } else {
5526                         /* enable wakeup by the MAC */
5527                         ew32(WUFC, wufc);
5528                         ew32(WUC, E1000_WUC_PME_EN);
5529                 }
5530         } else {
5531                 ew32(WUC, 0);
5532                 ew32(WUFC, 0);
5533         }
5534
5535         *enable_wake = !!wufc;
5536
5537         /* make sure adapter isn't asleep if manageability is enabled */
5538         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
5539             (hw->mac.ops.check_mng_mode(hw)))
5540                 *enable_wake = true;
5541
5542         if (adapter->hw.phy.type == e1000_phy_igp_3)
5543                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5544
5545         /*
5546          * Release control of h/w to f/w.  If f/w is AMT enabled, this
5547          * would have already happened in close and is redundant.
5548          */
5549         e1000e_release_hw_control(adapter);
5550
5551         pci_disable_device(pdev);
5552
5553         return 0;
5554 }
5555
5556 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
5557 {
5558         if (sleep && wake) {
5559                 pci_prepare_to_sleep(pdev);
5560                 return;
5561         }
5562
5563         pci_wake_from_d3(pdev, wake);
5564         pci_set_power_state(pdev, PCI_D3hot);
5565 }
5566
5567 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
5568                                     bool wake)
5569 {
5570         struct net_device *netdev = pci_get_drvdata(pdev);
5571         struct e1000_adapter *adapter = netdev_priv(netdev);
5572
5573         /*
5574          * The pci-e switch on some quad port adapters will report a
5575          * correctable error when the MAC transitions from D0 to D3.  To
5576          * prevent this we need to mask off the correctable errors on the
5577          * downstream port of the pci-e switch.
5578          */
5579         if (adapter->flags & FLAG_IS_QUAD_PORT) {
5580                 struct pci_dev *us_dev = pdev->bus->self;
5581                 int pos = pci_pcie_cap(us_dev);
5582                 u16 devctl;
5583
5584                 pci_read_config_word(us_dev, pos + PCI_EXP_DEVCTL, &devctl);
5585                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL,
5586                                       (devctl & ~PCI_EXP_DEVCTL_CERE));
5587
5588                 e1000_power_off(pdev, sleep, wake);
5589
5590                 pci_write_config_word(us_dev, pos + PCI_EXP_DEVCTL, devctl);
5591         } else {
5592                 e1000_power_off(pdev, sleep, wake);
5593         }
5594 }
5595
5596 #ifdef CONFIG_PCIEASPM
5597 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5598 {
5599         pci_disable_link_state_locked(pdev, state);
5600 }
5601 #else
5602 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5603 {
5604         int pos;
5605         u16 reg16;
5606
5607         /*
5608          * Both device and parent should have the same ASPM setting.
5609          * Disable ASPM in downstream component first and then upstream.
5610          */
5611         pos = pci_pcie_cap(pdev);
5612         pci_read_config_word(pdev, pos + PCI_EXP_LNKCTL, &reg16);
5613         reg16 &= ~state;
5614         pci_write_config_word(pdev, pos + PCI_EXP_LNKCTL, reg16);
5615
5616         if (!pdev->bus->self)
5617                 return;
5618
5619         pos = pci_pcie_cap(pdev->bus->self);
5620         pci_read_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, &reg16);
5621         reg16 &= ~state;
5622         pci_write_config_word(pdev->bus->self, pos + PCI_EXP_LNKCTL, reg16);
5623 }
5624 #endif
5625 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
5626 {
5627         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
5628                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
5629                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
5630
5631         __e1000e_disable_aspm(pdev, state);
5632 }
5633
5634 #ifdef CONFIG_PM
5635 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
5636 {
5637         return !!adapter->tx_ring->buffer_info;
5638 }
5639
5640 static int __e1000_resume(struct pci_dev *pdev)
5641 {
5642         struct net_device *netdev = pci_get_drvdata(pdev);
5643         struct e1000_adapter *adapter = netdev_priv(netdev);
5644         struct e1000_hw *hw = &adapter->hw;
5645         u16 aspm_disable_flag = 0;
5646         u32 err;
5647
5648         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5649                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5650         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5651                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5652         if (aspm_disable_flag)
5653                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5654
5655         pci_set_power_state(pdev, PCI_D0);
5656         pci_restore_state(pdev);
5657         pci_save_state(pdev);
5658
5659         e1000e_set_interrupt_capability(adapter);
5660         if (netif_running(netdev)) {
5661                 err = e1000_request_irq(adapter);
5662                 if (err)
5663                         return err;
5664         }
5665
5666         if (hw->mac.type == e1000_pch2lan)
5667                 e1000_resume_workarounds_pchlan(&adapter->hw);
5668
5669         e1000e_power_up_phy(adapter);
5670
5671         /* report the system wakeup cause from S3/S4 */
5672         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5673                 u16 phy_data;
5674
5675                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
5676                 if (phy_data) {
5677                         e_info("PHY Wakeup cause - %s\n",
5678                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
5679                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
5680                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
5681                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
5682                                 phy_data & E1000_WUS_LNKC ?
5683                                 "Link Status Change" : "other");
5684                 }
5685                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
5686         } else {
5687                 u32 wus = er32(WUS);
5688                 if (wus) {
5689                         e_info("MAC Wakeup cause - %s\n",
5690                                 wus & E1000_WUS_EX ? "Unicast Packet" :
5691                                 wus & E1000_WUS_MC ? "Multicast Packet" :
5692                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
5693                                 wus & E1000_WUS_MAG ? "Magic Packet" :
5694                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
5695                                 "other");
5696                 }
5697                 ew32(WUS, ~0);
5698         }
5699
5700         e1000e_reset(adapter);
5701
5702         e1000_init_manageability_pt(adapter);
5703
5704         if (netif_running(netdev))
5705                 e1000e_up(adapter);
5706
5707         netif_device_attach(netdev);
5708
5709         /*
5710          * If the controller has AMT, do not set DRV_LOAD until the interface
5711          * is up.  For all other cases, let the f/w know that the h/w is now
5712          * under the control of the driver.
5713          */
5714         if (!(adapter->flags & FLAG_HAS_AMT))
5715                 e1000e_get_hw_control(adapter);
5716
5717         return 0;
5718 }
5719
5720 #ifdef CONFIG_PM_SLEEP
5721 static int e1000_suspend(struct device *dev)
5722 {
5723         struct pci_dev *pdev = to_pci_dev(dev);
5724         int retval;
5725         bool wake;
5726
5727         retval = __e1000_shutdown(pdev, &wake, false);
5728         if (!retval)
5729                 e1000_complete_shutdown(pdev, true, wake);
5730
5731         return retval;
5732 }
5733
5734 static int e1000_resume(struct device *dev)
5735 {
5736         struct pci_dev *pdev = to_pci_dev(dev);
5737         struct net_device *netdev = pci_get_drvdata(pdev);
5738         struct e1000_adapter *adapter = netdev_priv(netdev);
5739
5740         if (e1000e_pm_ready(adapter))
5741                 adapter->idle_check = true;
5742
5743         return __e1000_resume(pdev);
5744 }
5745 #endif /* CONFIG_PM_SLEEP */
5746
5747 #ifdef CONFIG_PM_RUNTIME
5748 static int e1000_runtime_suspend(struct device *dev)
5749 {
5750         struct pci_dev *pdev = to_pci_dev(dev);
5751         struct net_device *netdev = pci_get_drvdata(pdev);
5752         struct e1000_adapter *adapter = netdev_priv(netdev);
5753
5754         if (e1000e_pm_ready(adapter)) {
5755                 bool wake;
5756
5757                 __e1000_shutdown(pdev, &wake, true);
5758         }
5759
5760         return 0;
5761 }
5762
5763 static int e1000_idle(struct device *dev)
5764 {
5765         struct pci_dev *pdev = to_pci_dev(dev);
5766         struct net_device *netdev = pci_get_drvdata(pdev);
5767         struct e1000_adapter *adapter = netdev_priv(netdev);
5768
5769         if (!e1000e_pm_ready(adapter))
5770                 return 0;
5771
5772         if (adapter->idle_check) {
5773                 adapter->idle_check = false;
5774                 if (!e1000e_has_link(adapter))
5775                         pm_schedule_suspend(dev, MSEC_PER_SEC);
5776         }
5777
5778         return -EBUSY;
5779 }
5780
5781 static int e1000_runtime_resume(struct device *dev)
5782 {
5783         struct pci_dev *pdev = to_pci_dev(dev);
5784         struct net_device *netdev = pci_get_drvdata(pdev);
5785         struct e1000_adapter *adapter = netdev_priv(netdev);
5786
5787         if (!e1000e_pm_ready(adapter))
5788                 return 0;
5789
5790         adapter->idle_check = !dev->power.runtime_auto;
5791         return __e1000_resume(pdev);
5792 }
5793 #endif /* CONFIG_PM_RUNTIME */
5794 #endif /* CONFIG_PM */
5795
5796 static void e1000_shutdown(struct pci_dev *pdev)
5797 {
5798         bool wake = false;
5799
5800         __e1000_shutdown(pdev, &wake, false);
5801
5802         if (system_state == SYSTEM_POWER_OFF)
5803                 e1000_complete_shutdown(pdev, false, wake);
5804 }
5805
5806 #ifdef CONFIG_NET_POLL_CONTROLLER
5807
5808 static irqreturn_t e1000_intr_msix(int irq, void *data)
5809 {
5810         struct net_device *netdev = data;
5811         struct e1000_adapter *adapter = netdev_priv(netdev);
5812
5813         if (adapter->msix_entries) {
5814                 int vector, msix_irq;
5815
5816                 vector = 0;
5817                 msix_irq = adapter->msix_entries[vector].vector;
5818                 disable_irq(msix_irq);
5819                 e1000_intr_msix_rx(msix_irq, netdev);
5820                 enable_irq(msix_irq);
5821
5822                 vector++;
5823                 msix_irq = adapter->msix_entries[vector].vector;
5824                 disable_irq(msix_irq);
5825                 e1000_intr_msix_tx(msix_irq, netdev);
5826                 enable_irq(msix_irq);
5827
5828                 vector++;
5829                 msix_irq = adapter->msix_entries[vector].vector;
5830                 disable_irq(msix_irq);
5831                 e1000_msix_other(msix_irq, netdev);
5832                 enable_irq(msix_irq);
5833         }
5834
5835         return IRQ_HANDLED;
5836 }
5837
5838 /*
5839  * Polling 'interrupt' - used by things like netconsole to send skbs
5840  * without having to re-enable interrupts. It's not called while
5841  * the interrupt routine is executing.
5842  */
5843 static void e1000_netpoll(struct net_device *netdev)
5844 {
5845         struct e1000_adapter *adapter = netdev_priv(netdev);
5846
5847         switch (adapter->int_mode) {
5848         case E1000E_INT_MODE_MSIX:
5849                 e1000_intr_msix(adapter->pdev->irq, netdev);
5850                 break;
5851         case E1000E_INT_MODE_MSI:
5852                 disable_irq(adapter->pdev->irq);
5853                 e1000_intr_msi(adapter->pdev->irq, netdev);
5854                 enable_irq(adapter->pdev->irq);
5855                 break;
5856         default: /* E1000E_INT_MODE_LEGACY */
5857                 disable_irq(adapter->pdev->irq);
5858                 e1000_intr(adapter->pdev->irq, netdev);
5859                 enable_irq(adapter->pdev->irq);
5860                 break;
5861         }
5862 }
5863 #endif
5864
5865 /**
5866  * e1000_io_error_detected - called when PCI error is detected
5867  * @pdev: Pointer to PCI device
5868  * @state: The current pci connection state
5869  *
5870  * This function is called after a PCI bus error affecting
5871  * this device has been detected.
5872  */
5873 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
5874                                                 pci_channel_state_t state)
5875 {
5876         struct net_device *netdev = pci_get_drvdata(pdev);
5877         struct e1000_adapter *adapter = netdev_priv(netdev);
5878
5879         netif_device_detach(netdev);
5880
5881         if (state == pci_channel_io_perm_failure)
5882                 return PCI_ERS_RESULT_DISCONNECT;
5883
5884         if (netif_running(netdev))
5885                 e1000e_down(adapter);
5886         pci_disable_device(pdev);
5887
5888         /* Request a slot slot reset. */
5889         return PCI_ERS_RESULT_NEED_RESET;
5890 }
5891
5892 /**
5893  * e1000_io_slot_reset - called after the pci bus has been reset.
5894  * @pdev: Pointer to PCI device
5895  *
5896  * Restart the card from scratch, as if from a cold-boot. Implementation
5897  * resembles the first-half of the e1000_resume routine.
5898  */
5899 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
5900 {
5901         struct net_device *netdev = pci_get_drvdata(pdev);
5902         struct e1000_adapter *adapter = netdev_priv(netdev);
5903         struct e1000_hw *hw = &adapter->hw;
5904         u16 aspm_disable_flag = 0;
5905         int err;
5906         pci_ers_result_t result;
5907
5908         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
5909                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
5910         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
5911                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
5912         if (aspm_disable_flag)
5913                 e1000e_disable_aspm(pdev, aspm_disable_flag);
5914
5915         err = pci_enable_device_mem(pdev);
5916         if (err) {
5917                 dev_err(&pdev->dev,
5918                         "Cannot re-enable PCI device after reset.\n");
5919                 result = PCI_ERS_RESULT_DISCONNECT;
5920         } else {
5921                 pci_set_master(pdev);
5922                 pdev->state_saved = true;
5923                 pci_restore_state(pdev);
5924
5925                 pci_enable_wake(pdev, PCI_D3hot, 0);
5926                 pci_enable_wake(pdev, PCI_D3cold, 0);
5927
5928                 e1000e_reset(adapter);
5929                 ew32(WUS, ~0);
5930                 result = PCI_ERS_RESULT_RECOVERED;
5931         }
5932
5933         pci_cleanup_aer_uncorrect_error_status(pdev);
5934
5935         return result;
5936 }
5937
5938 /**
5939  * e1000_io_resume - called when traffic can start flowing again.
5940  * @pdev: Pointer to PCI device
5941  *
5942  * This callback is called when the error recovery driver tells us that
5943  * its OK to resume normal operation. Implementation resembles the
5944  * second-half of the e1000_resume routine.
5945  */
5946 static void e1000_io_resume(struct pci_dev *pdev)
5947 {
5948         struct net_device *netdev = pci_get_drvdata(pdev);
5949         struct e1000_adapter *adapter = netdev_priv(netdev);
5950
5951         e1000_init_manageability_pt(adapter);
5952
5953         if (netif_running(netdev)) {
5954                 if (e1000e_up(adapter)) {
5955                         dev_err(&pdev->dev,
5956                                 "can't bring device back up after reset\n");
5957                         return;
5958                 }
5959         }
5960
5961         netif_device_attach(netdev);
5962
5963         /*
5964          * If the controller has AMT, do not set DRV_LOAD until the interface
5965          * is up.  For all other cases, let the f/w know that the h/w is now
5966          * under the control of the driver.
5967          */
5968         if (!(adapter->flags & FLAG_HAS_AMT))
5969                 e1000e_get_hw_control(adapter);
5970
5971 }
5972
5973 static void e1000_print_device_info(struct e1000_adapter *adapter)
5974 {
5975         struct e1000_hw *hw = &adapter->hw;
5976         struct net_device *netdev = adapter->netdev;
5977         u32 ret_val;
5978         u8 pba_str[E1000_PBANUM_LENGTH];
5979
5980         /* print bus type/speed/width info */
5981         e_info("(PCI Express:2.5GT/s:%s) %pM\n",
5982                /* bus width */
5983                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
5984                 "Width x1"),
5985                /* MAC address */
5986                netdev->dev_addr);
5987         e_info("Intel(R) PRO/%s Network Connection\n",
5988                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
5989         ret_val = e1000_read_pba_string_generic(hw, pba_str,
5990                                                 E1000_PBANUM_LENGTH);
5991         if (ret_val)
5992                 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
5993         e_info("MAC: %d, PHY: %d, PBA No: %s\n",
5994                hw->mac.type, hw->phy.type, pba_str);
5995 }
5996
5997 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
5998 {
5999         struct e1000_hw *hw = &adapter->hw;
6000         int ret_val;
6001         u16 buf = 0;
6002
6003         if (hw->mac.type != e1000_82573)
6004                 return;
6005
6006         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
6007         le16_to_cpus(&buf);
6008         if (!ret_val && (!(buf & (1 << 0)))) {
6009                 /* Deep Smart Power Down (DSPD) */
6010                 dev_warn(&adapter->pdev->dev,
6011                          "Warning: detected DSPD enabled in EEPROM\n");
6012         }
6013 }
6014
6015 static int e1000_set_features(struct net_device *netdev,
6016                               netdev_features_t features)
6017 {
6018         struct e1000_adapter *adapter = netdev_priv(netdev);
6019         netdev_features_t changed = features ^ netdev->features;
6020
6021         if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6022                 adapter->flags |= FLAG_TSO_FORCE;
6023
6024         if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
6025                          NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6026                          NETIF_F_RXALL)))
6027                 return 0;
6028
6029         /*
6030          * IP payload checksum (enabled with jumbos/packet-split when Rx
6031          * checksum is enabled) and generation of RSS hash is mutually
6032          * exclusive in the hardware.
6033          */
6034         if (adapter->rx_ps_pages &&
6035             (features & NETIF_F_RXCSUM) && (features & NETIF_F_RXHASH)) {
6036                 e_err("Enabling both receive checksum offload and receive hashing is not possible with jumbo frames.  Disable jumbos or enable only one of the receive offload features.\n");
6037                 return -EINVAL;
6038         }
6039
6040         if (changed & NETIF_F_RXFCS) {
6041                 if (features & NETIF_F_RXFCS) {
6042                         adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6043                 } else {
6044                         /* We need to take it back to defaults, which might mean
6045                          * stripping is still disabled at the adapter level.
6046                          */
6047                         if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6048                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6049                         else
6050                                 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6051                 }
6052         }
6053
6054         netdev->features = features;
6055
6056         if (netif_running(netdev))
6057                 e1000e_reinit_locked(adapter);
6058         else
6059                 e1000e_reset(adapter);
6060
6061         return 0;
6062 }
6063
6064 static const struct net_device_ops e1000e_netdev_ops = {
6065         .ndo_open               = e1000_open,
6066         .ndo_stop               = e1000_close,
6067         .ndo_start_xmit         = e1000_xmit_frame,
6068         .ndo_get_stats64        = e1000e_get_stats64,
6069         .ndo_set_rx_mode        = e1000e_set_rx_mode,
6070         .ndo_set_mac_address    = e1000_set_mac,
6071         .ndo_change_mtu         = e1000_change_mtu,
6072         .ndo_do_ioctl           = e1000_ioctl,
6073         .ndo_tx_timeout         = e1000_tx_timeout,
6074         .ndo_validate_addr      = eth_validate_addr,
6075
6076         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
6077         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
6078 #ifdef CONFIG_NET_POLL_CONTROLLER
6079         .ndo_poll_controller    = e1000_netpoll,
6080 #endif
6081         .ndo_set_features = e1000_set_features,
6082 };
6083
6084 /**
6085  * e1000_probe - Device Initialization Routine
6086  * @pdev: PCI device information struct
6087  * @ent: entry in e1000_pci_tbl
6088  *
6089  * Returns 0 on success, negative on failure
6090  *
6091  * e1000_probe initializes an adapter identified by a pci_dev structure.
6092  * The OS initialization, configuring of the adapter private structure,
6093  * and a hardware reset occur.
6094  **/
6095 static int __devinit e1000_probe(struct pci_dev *pdev,
6096                                  const struct pci_device_id *ent)
6097 {
6098         struct net_device *netdev;
6099         struct e1000_adapter *adapter;
6100         struct e1000_hw *hw;
6101         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
6102         resource_size_t mmio_start, mmio_len;
6103         resource_size_t flash_start, flash_len;
6104         static int cards_found;
6105         u16 aspm_disable_flag = 0;
6106         int i, err, pci_using_dac;
6107         u16 eeprom_data = 0;
6108         u16 eeprom_apme_mask = E1000_EEPROM_APME;
6109
6110         if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6111                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6112         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
6113                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6114         if (aspm_disable_flag)
6115                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6116
6117         err = pci_enable_device_mem(pdev);
6118         if (err)
6119                 return err;
6120
6121         pci_using_dac = 0;
6122         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
6123         if (!err) {
6124                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
6125                 if (!err)
6126                         pci_using_dac = 1;
6127         } else {
6128                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6129                 if (err) {
6130                         err = dma_set_coherent_mask(&pdev->dev,
6131                                                     DMA_BIT_MASK(32));
6132                         if (err) {
6133                                 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
6134                                 goto err_dma;
6135                         }
6136                 }
6137         }
6138
6139         err = pci_request_selected_regions_exclusive(pdev,
6140                                           pci_select_bars(pdev, IORESOURCE_MEM),
6141                                           e1000e_driver_name);
6142         if (err)
6143                 goto err_pci_reg;
6144
6145         /* AER (Advanced Error Reporting) hooks */
6146         pci_enable_pcie_error_reporting(pdev);
6147
6148         pci_set_master(pdev);
6149         /* PCI config space info */
6150         err = pci_save_state(pdev);
6151         if (err)
6152                 goto err_alloc_etherdev;
6153
6154         err = -ENOMEM;
6155         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6156         if (!netdev)
6157                 goto err_alloc_etherdev;
6158
6159         SET_NETDEV_DEV(netdev, &pdev->dev);
6160
6161         netdev->irq = pdev->irq;
6162
6163         pci_set_drvdata(pdev, netdev);
6164         adapter = netdev_priv(netdev);
6165         hw = &adapter->hw;
6166         adapter->netdev = netdev;
6167         adapter->pdev = pdev;
6168         adapter->ei = ei;
6169         adapter->pba = ei->pba;
6170         adapter->flags = ei->flags;
6171         adapter->flags2 = ei->flags2;
6172         adapter->hw.adapter = adapter;
6173         adapter->hw.mac.type = ei->mac;
6174         adapter->max_hw_frame_size = ei->max_hw_frame_size;
6175         adapter->msg_enable = (1 << NETIF_MSG_DRV | NETIF_MSG_PROBE) - 1;
6176
6177         mmio_start = pci_resource_start(pdev, 0);
6178         mmio_len = pci_resource_len(pdev, 0);
6179
6180         err = -EIO;
6181         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6182         if (!adapter->hw.hw_addr)
6183                 goto err_ioremap;
6184
6185         if ((adapter->flags & FLAG_HAS_FLASH) &&
6186             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6187                 flash_start = pci_resource_start(pdev, 1);
6188                 flash_len = pci_resource_len(pdev, 1);
6189                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6190                 if (!adapter->hw.flash_address)
6191                         goto err_flashmap;
6192         }
6193
6194         /* construct the net_device struct */
6195         netdev->netdev_ops              = &e1000e_netdev_ops;
6196         e1000e_set_ethtool_ops(netdev);
6197         netdev->watchdog_timeo          = 5 * HZ;
6198         netif_napi_add(netdev, &adapter->napi, e1000_clean, 64);
6199         strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
6200
6201         netdev->mem_start = mmio_start;
6202         netdev->mem_end = mmio_start + mmio_len;
6203
6204         adapter->bd_number = cards_found++;
6205
6206         e1000e_check_options(adapter);
6207
6208         /* setup adapter struct */
6209         err = e1000_sw_init(adapter);
6210         if (err)
6211                 goto err_sw_init;
6212
6213         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6214         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6215         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6216
6217         err = ei->get_variants(adapter);
6218         if (err)
6219                 goto err_hw_init;
6220
6221         if ((adapter->flags & FLAG_IS_ICH) &&
6222             (adapter->flags & FLAG_READ_ONLY_NVM))
6223                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6224
6225         hw->mac.ops.get_bus_info(&adapter->hw);
6226
6227         adapter->hw.phy.autoneg_wait_to_complete = 0;
6228
6229         /* Copper options */
6230         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6231                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6232                 adapter->hw.phy.disable_polarity_correction = 0;
6233                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6234         }
6235
6236         if (hw->phy.ops.check_reset_block(hw))
6237                 e_info("PHY reset is blocked due to SOL/IDER session.\n");
6238
6239         /* Set initial default active device features */
6240         netdev->features = (NETIF_F_SG |
6241                             NETIF_F_HW_VLAN_RX |
6242                             NETIF_F_HW_VLAN_TX |
6243                             NETIF_F_TSO |
6244                             NETIF_F_TSO6 |
6245                             NETIF_F_RXHASH |
6246                             NETIF_F_RXCSUM |
6247                             NETIF_F_HW_CSUM);
6248
6249         /* Set user-changeable features (subset of all device features) */
6250         netdev->hw_features = netdev->features;
6251         netdev->hw_features |= NETIF_F_RXFCS;
6252         netdev->priv_flags |= IFF_SUPP_NOFCS;
6253         netdev->hw_features |= NETIF_F_RXALL;
6254
6255         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6256                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
6257
6258         netdev->vlan_features |= (NETIF_F_SG |
6259                                   NETIF_F_TSO |
6260                                   NETIF_F_TSO6 |
6261                                   NETIF_F_HW_CSUM);
6262
6263         netdev->priv_flags |= IFF_UNICAST_FLT;
6264
6265         if (pci_using_dac) {
6266                 netdev->features |= NETIF_F_HIGHDMA;
6267                 netdev->vlan_features |= NETIF_F_HIGHDMA;
6268         }
6269
6270         if (e1000e_enable_mng_pass_thru(&adapter->hw))
6271                 adapter->flags |= FLAG_MNG_PT_ENABLED;
6272
6273         /*
6274          * before reading the NVM, reset the controller to
6275          * put the device in a known good starting state
6276          */
6277         adapter->hw.mac.ops.reset_hw(&adapter->hw);
6278
6279         /*
6280          * systems with ASPM and others may see the checksum fail on the first
6281          * attempt. Let's give it a few tries
6282          */
6283         for (i = 0;; i++) {
6284                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6285                         break;
6286                 if (i == 2) {
6287                         e_err("The NVM Checksum Is Not Valid\n");
6288                         err = -EIO;
6289                         goto err_eeprom;
6290                 }
6291         }
6292
6293         e1000_eeprom_checks(adapter);
6294
6295         /* copy the MAC address */
6296         if (e1000e_read_mac_addr(&adapter->hw))
6297                 e_err("NVM Read Error while reading MAC address\n");
6298
6299         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6300         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
6301
6302         if (!is_valid_ether_addr(netdev->perm_addr)) {
6303                 e_err("Invalid MAC Address: %pM\n", netdev->perm_addr);
6304                 err = -EIO;
6305                 goto err_eeprom;
6306         }
6307
6308         init_timer(&adapter->watchdog_timer);
6309         adapter->watchdog_timer.function = e1000_watchdog;
6310         adapter->watchdog_timer.data = (unsigned long) adapter;
6311
6312         init_timer(&adapter->phy_info_timer);
6313         adapter->phy_info_timer.function = e1000_update_phy_info;
6314         adapter->phy_info_timer.data = (unsigned long) adapter;
6315
6316         INIT_WORK(&adapter->reset_task, e1000_reset_task);
6317         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6318         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6319         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6320         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6321
6322         /* Initialize link parameters. User can change them with ethtool */
6323         adapter->hw.mac.autoneg = 1;
6324         adapter->fc_autoneg = true;
6325         adapter->hw.fc.requested_mode = e1000_fc_default;
6326         adapter->hw.fc.current_mode = e1000_fc_default;
6327         adapter->hw.phy.autoneg_advertised = 0x2f;
6328
6329         /* ring size defaults */
6330         adapter->rx_ring->count = 256;
6331         adapter->tx_ring->count = 256;
6332
6333         /*
6334          * Initial Wake on LAN setting - If APM wake is enabled in
6335          * the EEPROM, enable the ACPI Magic Packet filter
6336          */
6337         if (adapter->flags & FLAG_APME_IN_WUC) {
6338                 /* APME bit in EEPROM is mapped to WUC.APME */
6339                 eeprom_data = er32(WUC);
6340                 eeprom_apme_mask = E1000_WUC_APME;
6341                 if ((hw->mac.type > e1000_ich10lan) &&
6342                     (eeprom_data & E1000_WUC_PHY_WAKE))
6343                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6344         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6345                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6346                     (adapter->hw.bus.func == 1))
6347                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B,
6348                                        1, &eeprom_data);
6349                 else
6350                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A,
6351                                        1, &eeprom_data);
6352         }
6353
6354         /* fetch WoL from EEPROM */
6355         if (eeprom_data & eeprom_apme_mask)
6356                 adapter->eeprom_wol |= E1000_WUFC_MAG;
6357
6358         /*
6359          * now that we have the eeprom settings, apply the special cases
6360          * where the eeprom may be wrong or the board simply won't support
6361          * wake on lan on a particular port
6362          */
6363         if (!(adapter->flags & FLAG_HAS_WOL))
6364                 adapter->eeprom_wol = 0;
6365
6366         /* initialize the wol settings based on the eeprom settings */
6367         adapter->wol = adapter->eeprom_wol;
6368         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6369
6370         /* save off EEPROM version number */
6371         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6372
6373         /* reset the hardware with the new settings */
6374         e1000e_reset(adapter);
6375
6376         /*
6377          * If the controller has AMT, do not set DRV_LOAD until the interface
6378          * is up.  For all other cases, let the f/w know that the h/w is now
6379          * under the control of the driver.
6380          */
6381         if (!(adapter->flags & FLAG_HAS_AMT))
6382                 e1000e_get_hw_control(adapter);
6383
6384         strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
6385         err = register_netdev(netdev);
6386         if (err)
6387                 goto err_register;
6388
6389         /* carrier off reporting is important to ethtool even BEFORE open */
6390         netif_carrier_off(netdev);
6391
6392         e1000_print_device_info(adapter);
6393
6394         if (pci_dev_run_wake(pdev))
6395                 pm_runtime_put_noidle(&pdev->dev);
6396
6397         return 0;
6398
6399 err_register:
6400         if (!(adapter->flags & FLAG_HAS_AMT))
6401                 e1000e_release_hw_control(adapter);
6402 err_eeprom:
6403         if (!hw->phy.ops.check_reset_block(hw))
6404                 e1000_phy_hw_reset(&adapter->hw);
6405 err_hw_init:
6406         kfree(adapter->tx_ring);
6407         kfree(adapter->rx_ring);
6408 err_sw_init:
6409         if (adapter->hw.flash_address)
6410                 iounmap(adapter->hw.flash_address);
6411         e1000e_reset_interrupt_capability(adapter);
6412 err_flashmap:
6413         iounmap(adapter->hw.hw_addr);
6414 err_ioremap:
6415         free_netdev(netdev);
6416 err_alloc_etherdev:
6417         pci_release_selected_regions(pdev,
6418                                      pci_select_bars(pdev, IORESOURCE_MEM));
6419 err_pci_reg:
6420 err_dma:
6421         pci_disable_device(pdev);
6422         return err;
6423 }
6424
6425 /**
6426  * e1000_remove - Device Removal Routine
6427  * @pdev: PCI device information struct
6428  *
6429  * e1000_remove is called by the PCI subsystem to alert the driver
6430  * that it should release a PCI device.  The could be caused by a
6431  * Hot-Plug event, or because the driver is going to be removed from
6432  * memory.
6433  **/
6434 static void __devexit e1000_remove(struct pci_dev *pdev)
6435 {
6436         struct net_device *netdev = pci_get_drvdata(pdev);
6437         struct e1000_adapter *adapter = netdev_priv(netdev);
6438         bool down = test_bit(__E1000_DOWN, &adapter->state);
6439
6440         /*
6441          * The timers may be rescheduled, so explicitly disable them
6442          * from being rescheduled.
6443          */
6444         if (!down)
6445                 set_bit(__E1000_DOWN, &adapter->state);
6446         del_timer_sync(&adapter->watchdog_timer);
6447         del_timer_sync(&adapter->phy_info_timer);
6448
6449         cancel_work_sync(&adapter->reset_task);
6450         cancel_work_sync(&adapter->watchdog_task);
6451         cancel_work_sync(&adapter->downshift_task);
6452         cancel_work_sync(&adapter->update_phy_task);
6453         cancel_work_sync(&adapter->print_hang_task);
6454
6455         if (!(netdev->flags & IFF_UP))
6456                 e1000_power_down_phy(adapter);
6457
6458         /* Don't lie to e1000_close() down the road. */
6459         if (!down)
6460                 clear_bit(__E1000_DOWN, &adapter->state);
6461         unregister_netdev(netdev);
6462
6463         if (pci_dev_run_wake(pdev))
6464                 pm_runtime_get_noresume(&pdev->dev);
6465
6466         /*
6467          * Release control of h/w to f/w.  If f/w is AMT enabled, this
6468          * would have already happened in close and is redundant.
6469          */
6470         e1000e_release_hw_control(adapter);
6471
6472         e1000e_reset_interrupt_capability(adapter);
6473         kfree(adapter->tx_ring);
6474         kfree(adapter->rx_ring);
6475
6476         iounmap(adapter->hw.hw_addr);
6477         if (adapter->hw.flash_address)
6478                 iounmap(adapter->hw.flash_address);
6479         pci_release_selected_regions(pdev,
6480                                      pci_select_bars(pdev, IORESOURCE_MEM));
6481
6482         free_netdev(netdev);
6483
6484         /* AER disable */
6485         pci_disable_pcie_error_reporting(pdev);
6486
6487         pci_disable_device(pdev);
6488 }
6489
6490 /* PCI Error Recovery (ERS) */
6491 static struct pci_error_handlers e1000_err_handler = {
6492         .error_detected = e1000_io_error_detected,
6493         .slot_reset = e1000_io_slot_reset,
6494         .resume = e1000_io_resume,
6495 };
6496
6497 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6498         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6499         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6500         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6501         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
6502         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6503         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6504         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6505         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6506         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6507
6508         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6509         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6510         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6511         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6512
6513         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6514         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6515         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6516
6517         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6518         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6519         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6520
6521         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6522           board_80003es2lan },
6523         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6524           board_80003es2lan },
6525         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6526           board_80003es2lan },
6527         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6528           board_80003es2lan },
6529
6530         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6531         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6532         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6533         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6534         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6535         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6536         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6537         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6538
6539         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6540         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6541         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6542         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6543         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6544         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6545         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6546         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6547         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6548
6549         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6550         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6551         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6552
6553         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6554         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6555         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6556
6557         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6558         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6559         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
6560         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
6561
6562         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
6563         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
6564
6565         { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
6566 };
6567 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
6568
6569 #ifdef CONFIG_PM
6570 static const struct dev_pm_ops e1000_pm_ops = {
6571         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
6572         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
6573                                 e1000_runtime_resume, e1000_idle)
6574 };
6575 #endif
6576
6577 /* PCI Device API Driver */
6578 static struct pci_driver e1000_driver = {
6579         .name     = e1000e_driver_name,
6580         .id_table = e1000_pci_tbl,
6581         .probe    = e1000_probe,
6582         .remove   = __devexit_p(e1000_remove),
6583 #ifdef CONFIG_PM
6584         .driver   = {
6585                 .pm = &e1000_pm_ops,
6586         },
6587 #endif
6588         .shutdown = e1000_shutdown,
6589         .err_handler = &e1000_err_handler
6590 };
6591
6592 /**
6593  * e1000_init_module - Driver Registration Routine
6594  *
6595  * e1000_init_module is the first routine called when the driver is
6596  * loaded. All it does is register with the PCI subsystem.
6597  **/
6598 static int __init e1000_init_module(void)
6599 {
6600         int ret;
6601         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
6602                 e1000e_driver_version);
6603         pr_info("Copyright(c) 1999 - 2012 Intel Corporation.\n");
6604         ret = pci_register_driver(&e1000_driver);
6605
6606         return ret;
6607 }
6608 module_init(e1000_init_module);
6609
6610 /**
6611  * e1000_exit_module - Driver Exit Cleanup Routine
6612  *
6613  * e1000_exit_module is called just before the driver is removed
6614  * from memory.
6615  **/
6616 static void __exit e1000_exit_module(void)
6617 {
6618         pci_unregister_driver(&e1000_driver);
6619 }
6620 module_exit(e1000_exit_module);
6621
6622
6623 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
6624 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
6625 MODULE_LICENSE("GPL");
6626 MODULE_VERSION(DRV_VERSION);
6627
6628 /* netdev.c */