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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2012 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  30
  31 #include <linux/module.h>
  32 #include <linux/types.h>
  33 #include <linux/init.h>
  34 #include <linux/pci.h>
  35 #include <linux/vmalloc.h>
  36 #include <linux/pagemap.h>
  37 #include <linux/delay.h>
  38 #include <linux/netdevice.h>
  39 #include <linux/interrupt.h>
  40 #include <linux/tcp.h>
  41 #include <linux/ipv6.h>
  42 #include <linux/slab.h>
  43 #include <net/checksum.h>
  44 #include <net/ip6_checksum.h>
  45 #include <linux/mii.h>
  46 #include <linux/ethtool.h>
  47 #include <linux/if_vlan.h>
  48 #include <linux/cpu.h>
  49 #include <linux/smp.h>
  50 #include <linux/pm_qos.h>
  51 #include <linux/pm_runtime.h>
  52 #include <linux/aer.h>
  53 #include <linux/prefetch.h>
  54
  55 #include "e1000.h"
  56
  57 #define DRV_EXTRAVERSION "-k"
  58
  59 #define DRV_VERSION "2.1.4" DRV_EXTRAVERSION
  60 char e1000e_driver_name[] = "e1000e";
  61 const char e1000e_driver_version[] = DRV_VERSION;
  62
  63 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  64 static int debug = -1;
  65 module_param(debug, int, 0);
  66 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  67
  68 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
  69
  70 static const struct e1000_info *e1000_info_tbl[] = {
  71         [board_82571]           = &e1000_82571_info,
  72         [board_82572]           = &e1000_82572_info,
  73         [board_82573]           = &e1000_82573_info,
  74         [board_82574]           = &e1000_82574_info,
  75         [board_82583]           = &e1000_82583_info,
  76         [board_80003es2lan]     = &e1000_es2_info,
  77         [board_ich8lan]         = &e1000_ich8_info,
  78         [board_ich9lan]         = &e1000_ich9_info,
  79         [board_ich10lan]        = &e1000_ich10_info,
  80         [board_pchlan]          = &e1000_pch_info,
  81         [board_pch2lan]         = &e1000_pch2_info,
  82         [board_pch_lpt]         = &e1000_pch_lpt_info,
  83 };
  84
  85 struct e1000_reg_info {
  86         u32 ofs;
  87         char *name;
  88 };
  89
  90 #define E1000_RDFH      0x02410 /* Rx Data FIFO Head - RW */
  91 #define E1000_RDFT      0x02418 /* Rx Data FIFO Tail - RW */
  92 #define E1000_RDFHS     0x02420 /* Rx Data FIFO Head Saved - RW */
  93 #define E1000_RDFTS     0x02428 /* Rx Data FIFO Tail Saved - RW */
  94 #define E1000_RDFPC     0x02430 /* Rx Data FIFO Packet Count - RW */
  95
  96 #define E1000_TDFH      0x03410 /* Tx Data FIFO Head - RW */
  97 #define E1000_TDFT      0x03418 /* Tx Data FIFO Tail - RW */
  98 #define E1000_TDFHS     0x03420 /* Tx Data FIFO Head Saved - RW */
  99 #define E1000_TDFTS     0x03428 /* Tx Data FIFO Tail Saved - RW */
 100 #define E1000_TDFPC     0x03430 /* Tx Data FIFO Packet Count - RW */
 101
 102 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
 103
 104         /* General Registers */
 105         {E1000_CTRL, "CTRL"},
 106         {E1000_STATUS, "STATUS"},
 107         {E1000_CTRL_EXT, "CTRL_EXT"},
 108
 109         /* Interrupt Registers */
 110         {E1000_ICR, "ICR"},
 111
 112         /* Rx Registers */
 113         {E1000_RCTL, "RCTL"},
 114         {E1000_RDLEN(0), "RDLEN"},
 115         {E1000_RDH(0), "RDH"},
 116         {E1000_RDT(0), "RDT"},
 117         {E1000_RDTR, "RDTR"},
 118         {E1000_RXDCTL(0), "RXDCTL"},
 119         {E1000_ERT, "ERT"},
 120         {E1000_RDBAL(0), "RDBAL"},
 121         {E1000_RDBAH(0), "RDBAH"},
 122         {E1000_RDFH, "RDFH"},
 123         {E1000_RDFT, "RDFT"},
 124         {E1000_RDFHS, "RDFHS"},
 125         {E1000_RDFTS, "RDFTS"},
 126         {E1000_RDFPC, "RDFPC"},
 127
 128         /* Tx Registers */
 129         {E1000_TCTL, "TCTL"},
 130         {E1000_TDBAL(0), "TDBAL"},
 131         {E1000_TDBAH(0), "TDBAH"},
 132         {E1000_TDLEN(0), "TDLEN"},
 133         {E1000_TDH(0), "TDH"},
 134         {E1000_TDT(0), "TDT"},
 135         {E1000_TIDV, "TIDV"},
 136         {E1000_TXDCTL(0), "TXDCTL"},
 137         {E1000_TADV, "TADV"},
 138         {E1000_TARC(0), "TARC"},
 139         {E1000_TDFH, "TDFH"},
 140         {E1000_TDFT, "TDFT"},
 141         {E1000_TDFHS, "TDFHS"},
 142         {E1000_TDFTS, "TDFTS"},
 143         {E1000_TDFPC, "TDFPC"},
 144
 145         /* List Terminator */
 146         {0, NULL}
 147 };
 148
 149 /**
 150  * e1000_regdump - register printout routine
 151  * @hw: pointer to the HW structure
 152  * @reginfo: pointer to the register info table
 153  **/
 154 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
 155 {
 156         int n = 0;
 157         char rname[16];
 158         u32 regs[8];
 159
 160         switch (reginfo->ofs) {
 161         case E1000_RXDCTL(0):
 162                 for (n = 0; n < 2; n++)
 163                         regs[n] = __er32(hw, E1000_RXDCTL(n));
 164                 break;
 165         case E1000_TXDCTL(0):
 166                 for (n = 0; n < 2; n++)
 167                         regs[n] = __er32(hw, E1000_TXDCTL(n));
 168                 break;
 169         case E1000_TARC(0):
 170                 for (n = 0; n < 2; n++)
 171                         regs[n] = __er32(hw, E1000_TARC(n));
 172                 break;
 173         default:
 174                 pr_info("%-15s %08x\n",
 175                         reginfo->name, __er32(hw, reginfo->ofs));
 176                 return;
 177         }
 178
 179         snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
 180         pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
 181 }
 182
 183 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
 184                                  struct e1000_buffer *bi)
 185 {
 186         int i;
 187         struct e1000_ps_page *ps_page;
 188
 189         for (i = 0; i < adapter->rx_ps_pages; i++) {
 190                 ps_page = &bi->ps_pages[i];
 191
 192                 if (ps_page->page) {
 193                         pr_info("packet dump for ps_page %d:\n", i);
 194                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 195                                        16, 1, page_address(ps_page->page),
 196                                        PAGE_SIZE, true);
 197                 }
 198         }
 199 }
 200
 201 /**
 202  * e1000e_dump - Print registers, Tx-ring and Rx-ring
 203  * @adapter: board private structure
 204  **/
 205 static void e1000e_dump(struct e1000_adapter *adapter)
 206 {
 207         struct net_device *netdev = adapter->netdev;
 208         struct e1000_hw *hw = &adapter->hw;
 209         struct e1000_reg_info *reginfo;
 210         struct e1000_ring *tx_ring = adapter->tx_ring;
 211         struct e1000_tx_desc *tx_desc;
 212         struct my_u0 {
 213                 __le64 a;
 214                 __le64 b;
 215         } *u0;
 216         struct e1000_buffer *buffer_info;
 217         struct e1000_ring *rx_ring = adapter->rx_ring;
 218         union e1000_rx_desc_packet_split *rx_desc_ps;
 219         union e1000_rx_desc_extended *rx_desc;
 220         struct my_u1 {
 221                 __le64 a;
 222                 __le64 b;
 223                 __le64 c;
 224                 __le64 d;
 225         } *u1;
 226         u32 staterr;
 227         int i = 0;
 228
 229         if (!netif_msg_hw(adapter))
 230                 return;
 231
 232         /* Print netdevice Info */
 233         if (netdev) {
 234                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 235                 pr_info("Device Name     state            trans_start      last_rx\n");
 236                 pr_info("%-15s %016lX %016lX %016lX\n",
 237                         netdev->name, netdev->state, netdev->trans_start,
 238                         netdev->last_rx);
 239         }
 240
 241         /* Print Registers */
 242         dev_info(&adapter->pdev->dev, "Register Dump\n");
 243         pr_info(" Register Name   Value\n");
 244         for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
 245              reginfo->name; reginfo++) {
 246                 e1000_regdump(hw, reginfo);
 247         }
 248
 249         /* Print Tx Ring Summary */
 250         if (!netdev || !netif_running(netdev))
 251                 return;
 252
 253         dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
 254         pr_info("Queue [NTU] [NTC] [bi(ntc)->dma  ] leng ntw timestamp\n");
 255         buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
 256         pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
 257                 0, tx_ring->next_to_use, tx_ring->next_to_clean,
 258                 (unsigned long long)buffer_info->dma,
 259                 buffer_info->length,
 260                 buffer_info->next_to_watch,
 261                 (unsigned long long)buffer_info->time_stamp);
 262
 263         /* Print Tx Ring */
 264         if (!netif_msg_tx_done(adapter))
 265                 goto rx_ring_summary;
 266
 267         dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
 268
 269         /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
 270          *
 271          * Legacy Transmit Descriptor
 272          *   +--------------------------------------------------------------+
 273          * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |
 274          *   +--------------------------------------------------------------+
 275          * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |
 276          *   +--------------------------------------------------------------+
 277          *   63       48 47        36 35    32 31     24 23    16 15        0
 278          *
 279          * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
 280          *   63      48 47    40 39       32 31             16 15    8 7      0
 281          *   +----------------------------------------------------------------+
 282          * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |
 283          *   +----------------------------------------------------------------+
 284          * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |
 285          *   +----------------------------------------------------------------+
 286          *   63      48 47    40 39 36 35 32 31   24 23  20 19                0
 287          *
 288          * Extended Data Descriptor (DTYP=0x1)
 289          *   +----------------------------------------------------------------+
 290          * 0 |                     Buffer Address [63:0]                      |
 291          *   +----------------------------------------------------------------+
 292          * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |
 293          *   +----------------------------------------------------------------+
 294          *   63       48 47     40 39  36 35    32 31     24 23  20 19        0
 295          */
 296         pr_info("Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Legacy format\n");
 297         pr_info("Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Context format\n");
 298         pr_info("Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Data format\n");
 299         for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 300                 const char *next_desc;
 301                 tx_desc = E1000_TX_DESC(*tx_ring, i);
 302                 buffer_info = &tx_ring->buffer_info[i];
 303                 u0 = (struct my_u0 *)tx_desc;
 304                 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
 305                         next_desc = " NTC/U";
 306                 else if (i == tx_ring->next_to_use)
 307                         next_desc = " NTU";
 308                 else if (i == tx_ring->next_to_clean)
 309                         next_desc = " NTC";
 310                 else
 311                         next_desc = "";
 312                 pr_info("T%c[0x%03X]    %016llX %016llX %016llX %04X  %3X %016llX %p%s\n",
 313                         (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
 314                          ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
 315                         i,
 316                         (unsigned long long)le64_to_cpu(u0->a),
 317                         (unsigned long long)le64_to_cpu(u0->b),
 318                         (unsigned long long)buffer_info->dma,
 319                         buffer_info->length, buffer_info->next_to_watch,
 320                         (unsigned long long)buffer_info->time_stamp,
 321                         buffer_info->skb, next_desc);
 322
 323                 if (netif_msg_pktdata(adapter) && buffer_info->skb)
 324                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 325                                        16, 1, buffer_info->skb->data,
 326                                        buffer_info->skb->len, true);
 327         }
 328
 329         /* Print Rx Ring Summary */
 330 rx_ring_summary:
 331         dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
 332         pr_info("Queue [NTU] [NTC]\n");
 333         pr_info(" %5d %5X %5X\n",
 334                 0, rx_ring->next_to_use, rx_ring->next_to_clean);
 335
 336         /* Print Rx Ring */
 337         if (!netif_msg_rx_status(adapter))
 338                 return;
 339
 340         dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
 341         switch (adapter->rx_ps_pages) {
 342         case 1:
 343         case 2:
 344         case 3:
 345                 /* [Extended] Packet Split Receive Descriptor Format
 346                  *
 347                  *    +-----------------------------------------------------+
 348                  *  0 |                Buffer Address 0 [63:0]              |
 349                  *    +-----------------------------------------------------+
 350                  *  8 |                Buffer Address 1 [63:0]              |
 351                  *    +-----------------------------------------------------+
 352                  * 16 |                Buffer Address 2 [63:0]              |
 353                  *    +-----------------------------------------------------+
 354                  * 24 |                Buffer Address 3 [63:0]              |
 355                  *    +-----------------------------------------------------+
 356                  */
 357                 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");
 358                 /* [Extended] Receive Descriptor (Write-Back) Format
 359                  *
 360                  *   63       48 47    32 31     13 12    8 7    4 3        0
 361                  *   +------------------------------------------------------+
 362                  * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |
 363                  *   | Checksum | Ident  |         | Queue |      |  Type   |
 364                  *   +------------------------------------------------------+
 365                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 366                  *   +------------------------------------------------------+
 367                  *   63       48 47    32 31            20 19               0
 368                  */
 369                 pr_info("RWB[desc]      [ck ipid mrqhsh] [vl   l0 ee  es] [ l3  l2  l1 hs] [reserved      ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
 370                 for (i = 0; i < rx_ring->count; i++) {
 371                         const char *next_desc;
 372                         buffer_info = &rx_ring->buffer_info[i];
 373                         rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
 374                         u1 = (struct my_u1 *)rx_desc_ps;
 375                         staterr =
 376                             le32_to_cpu(rx_desc_ps->wb.middle.status_error);
 377
 378                         if (i == rx_ring->next_to_use)
 379                                 next_desc = " NTU";
 380                         else if (i == rx_ring->next_to_clean)
 381                                 next_desc = " NTC";
 382                         else
 383                                 next_desc = "";
 384
 385                         if (staterr & E1000_RXD_STAT_DD) {
 386                                 /* Descriptor Done */
 387                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX ---------------- %p%s\n",
 388                                         "RWB", i,
 389                                         (unsigned long long)le64_to_cpu(u1->a),
 390                                         (unsigned long long)le64_to_cpu(u1->b),
 391                                         (unsigned long long)le64_to_cpu(u1->c),
 392                                         (unsigned long long)le64_to_cpu(u1->d),
 393                                         buffer_info->skb, next_desc);
 394                         } else {
 395                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX %016llX %p%s\n",
 396                                         "R  ", i,
 397                                         (unsigned long long)le64_to_cpu(u1->a),
 398                                         (unsigned long long)le64_to_cpu(u1->b),
 399                                         (unsigned long long)le64_to_cpu(u1->c),
 400                                         (unsigned long long)le64_to_cpu(u1->d),
 401                                         (unsigned long long)buffer_info->dma,
 402                                         buffer_info->skb, next_desc);
 403
 404                                 if (netif_msg_pktdata(adapter))
 405                                         e1000e_dump_ps_pages(adapter,
 406                                                              buffer_info);
 407                         }
 408                 }
 409                 break;
 410         default:
 411         case 0:
 412                 /* Extended Receive Descriptor (Read) Format
 413                  *
 414                  *   +-----------------------------------------------------+
 415                  * 0 |                Buffer Address [63:0]                |
 416                  *   +-----------------------------------------------------+
 417                  * 8 |                      Reserved                       |
 418                  *   +-----------------------------------------------------+
 419                  */
 420                 pr_info("R  [desc]      [buf addr 63:0 ] [reserved 63:0 ] [bi->dma       ] [bi->skb] <-- Ext (Read) format\n");
 421                 /* Extended Receive Descriptor (Write-Back) Format
 422                  *
 423                  *   63       48 47    32 31    24 23            4 3        0
 424                  *   +------------------------------------------------------+
 425                  *   |     RSS Hash      |        |               |         |
 426                  * 0 +-------------------+  Rsvd  |   Reserved    | MRQ RSS |
 427                  *   | Packet   | IP     |        |               |  Type   |
 428                  *   | Checksum | Ident  |        |               |         |
 429                  *   +------------------------------------------------------+
 430                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 431                  *   +------------------------------------------------------+
 432                  *   63       48 47    32 31            20 19               0
 433                  */
 434                 pr_info("RWB[desc]      [cs ipid    mrq] [vt   ln xe  xs] [bi->skb] <-- Ext (Write-Back) format\n");
 435
 436                 for (i = 0; i < rx_ring->count; i++) {
 437                         const char *next_desc;
 438
 439                         buffer_info = &rx_ring->buffer_info[i];
 440                         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 441                         u1 = (struct my_u1 *)rx_desc;
 442                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 443
 444                         if (i == rx_ring->next_to_use)
 445                                 next_desc = " NTU";
 446                         else if (i == rx_ring->next_to_clean)
 447                                 next_desc = " NTC";
 448                         else
 449                                 next_desc = "";
 450
 451                         if (staterr & E1000_RXD_STAT_DD) {
 452                                 /* Descriptor Done */
 453                                 pr_info("%s[0x%03X]     %016llX %016llX ---------------- %p%s\n",
 454                                         "RWB", i,
 455                                         (unsigned long long)le64_to_cpu(u1->a),
 456                                         (unsigned long long)le64_to_cpu(u1->b),
 457                                         buffer_info->skb, next_desc);
 458                         } else {
 459                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %p%s\n",
 460                                         "R  ", i,
 461                                         (unsigned long long)le64_to_cpu(u1->a),
 462                                         (unsigned long long)le64_to_cpu(u1->b),
 463                                         (unsigned long long)buffer_info->dma,
 464                                         buffer_info->skb, next_desc);
 465
 466                                 if (netif_msg_pktdata(adapter) &&
 467                                     buffer_info->skb)
 468                                         print_hex_dump(KERN_INFO, "",
 469                                                        DUMP_PREFIX_ADDRESS, 16,
 470                                                        1,
 471                                                        buffer_info->skb->data,
 472                                                        adapter->rx_buffer_len,
 473                                                        true);
 474                         }
 475                 }
 476         }
 477 }
 478
 479 /**
 480  * e1000_desc_unused - calculate if we have unused descriptors
 481  **/
 482 static int e1000_desc_unused(struct e1000_ring *ring)
 483 {
 484         if (ring->next_to_clean > ring->next_to_use)
 485                 return ring->next_to_clean - ring->next_to_use - 1;
 486
 487         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 488 }
 489
 490 /**
 491  * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp
 492  * @adapter: board private structure
 493  * @hwtstamps: time stamp structure to update
 494  * @systim: unsigned 64bit system time value.
 495  *
 496  * Convert the system time value stored in the RX/TXSTMP registers into a
 497  * hwtstamp which can be used by the upper level time stamping functions.
 498  *
 499  * The 'systim_lock' spinlock is used to protect the consistency of the
 500  * system time value. This is needed because reading the 64 bit time
 501  * value involves reading two 32 bit registers. The first read latches the
 502  * value.
 503  **/
 504 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter,
 505                                       struct skb_shared_hwtstamps *hwtstamps,
 506                                       u64 systim)
 507 {
 508         u64 ns;
 509         unsigned long flags;
 510
 511         spin_lock_irqsave(&adapter->systim_lock, flags);
 512         ns = timecounter_cyc2time(&adapter->tc, systim);
 513         spin_unlock_irqrestore(&adapter->systim_lock, flags);
 514
 515         memset(hwtstamps, 0, sizeof(*hwtstamps));
 516         hwtstamps->hwtstamp = ns_to_ktime(ns);
 517 }
 518
 519 /**
 520  * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp
 521  * @adapter: board private structure
 522  * @status: descriptor extended error and status field
 523  * @skb: particular skb to include time stamp
 524  *
 525  * If the time stamp is valid, convert it into the timecounter ns value
 526  * and store that result into the shhwtstamps structure which is passed
 527  * up the network stack.
 528  **/
 529 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status,
 530                                struct sk_buff *skb)
 531 {
 532         struct e1000_hw *hw = &adapter->hw;
 533         u64 rxstmp;
 534
 535         if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) ||
 536             !(status & E1000_RXDEXT_STATERR_TST) ||
 537             !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
 538                 return;
 539
 540         /* The Rx time stamp registers contain the time stamp.  No other
 541          * received packet will be time stamped until the Rx time stamp
 542          * registers are read.  Because only one packet can be time stamped
 543          * at a time, the register values must belong to this packet and
 544          * therefore none of the other additional attributes need to be
 545          * compared.
 546          */
 547         rxstmp = (u64)er32(RXSTMPL);
 548         rxstmp |= (u64)er32(RXSTMPH) << 32;
 549         e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp);
 550
 551         adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP;
 552 }
 553
 554 /**
 555  * e1000_receive_skb - helper function to handle Rx indications
 556  * @adapter: board private structure
 557  * @staterr: descriptor extended error and status field as written by hardware
 558  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 559  * @skb: pointer to sk_buff to be indicated to stack
 560  **/
 561 static void e1000_receive_skb(struct e1000_adapter *adapter,
 562                               struct net_device *netdev, struct sk_buff *skb,
 563                               u32 staterr, __le16 vlan)
 564 {
 565         u16 tag = le16_to_cpu(vlan);
 566
 567         e1000e_rx_hwtstamp(adapter, staterr, skb);
 568
 569         skb->protocol = eth_type_trans(skb, netdev);
 570
 571         if (staterr & E1000_RXD_STAT_VP)
 572                 __vlan_hwaccel_put_tag(skb, tag);
 573
 574         napi_gro_receive(&adapter->napi, skb);
 575 }
 576
 577 /**
 578  * e1000_rx_checksum - Receive Checksum Offload
 579  * @adapter: board private structure
 580  * @status_err: receive descriptor status and error fields
 581  * @csum: receive descriptor csum field
 582  * @sk_buff: socket buffer with received data
 583  **/
 584 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 585                               struct sk_buff *skb)
 586 {
 587         u16 status = (u16)status_err;
 588         u8 errors = (u8)(status_err >> 24);
 589
 590         skb_checksum_none_assert(skb);
 591
 592         /* Rx checksum disabled */
 593         if (!(adapter->netdev->features & NETIF_F_RXCSUM))
 594                 return;
 595
 596         /* Ignore Checksum bit is set */
 597         if (status & E1000_RXD_STAT_IXSM)
 598                 return;
 599
 600         /* TCP/UDP checksum error bit or IP checksum error bit is set */
 601         if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
 602                 /* let the stack verify checksum errors */
 603                 adapter->hw_csum_err++;
 604                 return;
 605         }
 606
 607         /* TCP/UDP Checksum has not been calculated */
 608         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 609                 return;
 610
 611         /* It must be a TCP or UDP packet with a valid checksum */
 612         skb->ip_summed = CHECKSUM_UNNECESSARY;
 613         adapter->hw_csum_good++;
 614 }
 615
 616 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
 617 {
 618         struct e1000_adapter *adapter = rx_ring->adapter;
 619         struct e1000_hw *hw = &adapter->hw;
 620         s32 ret_val = __ew32_prepare(hw);
 621
 622         writel(i, rx_ring->tail);
 623
 624         if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
 625                 u32 rctl = er32(RCTL);
 626                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
 627                 e_err("ME firmware caused invalid RDT - resetting\n");
 628                 schedule_work(&adapter->reset_task);
 629         }
 630 }
 631
 632 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
 633 {
 634         struct e1000_adapter *adapter = tx_ring->adapter;
 635         struct e1000_hw *hw = &adapter->hw;
 636         s32 ret_val = __ew32_prepare(hw);
 637
 638         writel(i, tx_ring->tail);
 639
 640         if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
 641                 u32 tctl = er32(TCTL);
 642                 ew32(TCTL, tctl & ~E1000_TCTL_EN);
 643                 e_err("ME firmware caused invalid TDT - resetting\n");
 644                 schedule_work(&adapter->reset_task);
 645         }
 646 }
 647
 648 /**
 649  * e1000_alloc_rx_buffers - Replace used receive buffers
 650  * @rx_ring: Rx descriptor ring
 651  **/
 652 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
 653                                    int cleaned_count, gfp_t gfp)
 654 {
 655         struct e1000_adapter *adapter = rx_ring->adapter;
 656         struct net_device *netdev = adapter->netdev;
 657         struct pci_dev *pdev = adapter->pdev;
 658         union e1000_rx_desc_extended *rx_desc;
 659         struct e1000_buffer *buffer_info;
 660         struct sk_buff *skb;
 661         unsigned int i;
 662         unsigned int bufsz = adapter->rx_buffer_len;
 663
 664         i = rx_ring->next_to_use;
 665         buffer_info = &rx_ring->buffer_info[i];
 666
 667         while (cleaned_count--) {
 668                 skb = buffer_info->skb;
 669                 if (skb) {
 670                         skb_trim(skb, 0);
 671                         goto map_skb;
 672                 }
 673
 674                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 675                 if (!skb) {
 676                         /* Better luck next round */
 677                         adapter->alloc_rx_buff_failed++;
 678                         break;
 679                 }
 680
 681                 buffer_info->skb = skb;
 682 map_skb:
 683                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 684                                                   adapter->rx_buffer_len,
 685                                                   DMA_FROM_DEVICE);
 686                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 687                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 688                         adapter->rx_dma_failed++;
 689                         break;
 690                 }
 691
 692                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 693                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 694
 695                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 696                         /* Force memory writes to complete before letting h/w
 697                          * know there are new descriptors to fetch.  (Only
 698                          * applicable for weak-ordered memory model archs,
 699                          * such as IA-64).
 700                          */
 701                         wmb();
 702                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 703                                 e1000e_update_rdt_wa(rx_ring, i);
 704                         else
 705                                 writel(i, rx_ring->tail);
 706                 }
 707                 i++;
 708                 if (i == rx_ring->count)
 709                         i = 0;
 710                 buffer_info = &rx_ring->buffer_info[i];
 711         }
 712
 713         rx_ring->next_to_use = i;
 714 }
 715
 716 /**
 717  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 718  * @rx_ring: Rx descriptor ring
 719  **/
 720 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
 721                                       int cleaned_count, gfp_t gfp)
 722 {
 723         struct e1000_adapter *adapter = rx_ring->adapter;
 724         struct net_device *netdev = adapter->netdev;
 725         struct pci_dev *pdev = adapter->pdev;
 726         union e1000_rx_desc_packet_split *rx_desc;
 727         struct e1000_buffer *buffer_info;
 728         struct e1000_ps_page *ps_page;
 729         struct sk_buff *skb;
 730         unsigned int i, j;
 731
 732         i = rx_ring->next_to_use;
 733         buffer_info = &rx_ring->buffer_info[i];
 734
 735         while (cleaned_count--) {
 736                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 737
 738                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 739                         ps_page = &buffer_info->ps_pages[j];
 740                         if (j >= adapter->rx_ps_pages) {
 741                                 /* all unused desc entries get hw null ptr */
 742                                 rx_desc->read.buffer_addr[j + 1] =
 743                                     ~cpu_to_le64(0);
 744                                 continue;
 745                         }
 746                         if (!ps_page->page) {
 747                                 ps_page->page = alloc_page(gfp);
 748                                 if (!ps_page->page) {
 749                                         adapter->alloc_rx_buff_failed++;
 750                                         goto no_buffers;
 751                                 }
 752                                 ps_page->dma = dma_map_page(&pdev->dev,
 753                                                             ps_page->page,
 754                                                             0, PAGE_SIZE,
 755                                                             DMA_FROM_DEVICE);
 756                                 if (dma_mapping_error(&pdev->dev,
 757                                                       ps_page->dma)) {
 758                                         dev_err(&adapter->pdev->dev,
 759                                                 "Rx DMA page map failed\n");
 760                                         adapter->rx_dma_failed++;
 761                                         goto no_buffers;
 762                                 }
 763                         }
 764                         /* Refresh the desc even if buffer_addrs
 765                          * didn't change because each write-back
 766                          * erases this info.
 767                          */
 768                         rx_desc->read.buffer_addr[j + 1] =
 769                             cpu_to_le64(ps_page->dma);
 770                 }
 771
 772                 skb = __netdev_alloc_skb_ip_align(netdev,
 773                                                   adapter->rx_ps_bsize0,
 774                                                   gfp);
 775
 776                 if (!skb) {
 777                         adapter->alloc_rx_buff_failed++;
 778                         break;
 779                 }
 780
 781                 buffer_info->skb = skb;
 782                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 783                                                   adapter->rx_ps_bsize0,
 784                                                   DMA_FROM_DEVICE);
 785                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 786                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 787                         adapter->rx_dma_failed++;
 788                         /* cleanup skb */
 789                         dev_kfree_skb_any(skb);
 790                         buffer_info->skb = NULL;
 791                         break;
 792                 }
 793
 794                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 795
 796                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 797                         /* Force memory writes to complete before letting h/w
 798                          * know there are new descriptors to fetch.  (Only
 799                          * applicable for weak-ordered memory model archs,
 800                          * such as IA-64).
 801                          */
 802                         wmb();
 803                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 804                                 e1000e_update_rdt_wa(rx_ring, i << 1);
 805                         else
 806                                 writel(i << 1, rx_ring->tail);
 807                 }
 808
 809                 i++;
 810                 if (i == rx_ring->count)
 811                         i = 0;
 812                 buffer_info = &rx_ring->buffer_info[i];
 813         }
 814
 815 no_buffers:
 816         rx_ring->next_to_use = i;
 817 }
 818
 819 /**
 820  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 821  * @rx_ring: Rx descriptor ring
 822  * @cleaned_count: number of buffers to allocate this pass
 823  **/
 824
 825 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
 826                                          int cleaned_count, gfp_t gfp)
 827 {
 828         struct e1000_adapter *adapter = rx_ring->adapter;
 829         struct net_device *netdev = adapter->netdev;
 830         struct pci_dev *pdev = adapter->pdev;
 831         union e1000_rx_desc_extended *rx_desc;
 832         struct e1000_buffer *buffer_info;
 833         struct sk_buff *skb;
 834         unsigned int i;
 835         unsigned int bufsz = 256 - 16;  /* for skb_reserve */
 836
 837         i = rx_ring->next_to_use;
 838         buffer_info = &rx_ring->buffer_info[i];
 839
 840         while (cleaned_count--) {
 841                 skb = buffer_info->skb;
 842                 if (skb) {
 843                         skb_trim(skb, 0);
 844                         goto check_page;
 845                 }
 846
 847                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 848                 if (unlikely(!skb)) {
 849                         /* Better luck next round */
 850                         adapter->alloc_rx_buff_failed++;
 851                         break;
 852                 }
 853
 854                 buffer_info->skb = skb;
 855 check_page:
 856                 /* allocate a new page if necessary */
 857                 if (!buffer_info->page) {
 858                         buffer_info->page = alloc_page(gfp);
 859                         if (unlikely(!buffer_info->page)) {
 860                                 adapter->alloc_rx_buff_failed++;
 861                                 break;
 862                         }
 863                 }
 864
 865                 if (!buffer_info->dma)
 866                         buffer_info->dma = dma_map_page(&pdev->dev,
 867                                                         buffer_info->page, 0,
 868                                                         PAGE_SIZE,
 869                                                         DMA_FROM_DEVICE);
 870
 871                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 872                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 873
 874                 if (unlikely(++i == rx_ring->count))
 875                         i = 0;
 876                 buffer_info = &rx_ring->buffer_info[i];
 877         }
 878
 879         if (likely(rx_ring->next_to_use != i)) {
 880                 rx_ring->next_to_use = i;
 881                 if (unlikely(i-- == 0))
 882                         i = (rx_ring->count - 1);
 883
 884                 /* Force memory writes to complete before letting h/w
 885                  * know there are new descriptors to fetch.  (Only
 886                  * applicable for weak-ordered memory model archs,
 887                  * such as IA-64).
 888                  */
 889                 wmb();
 890                 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 891                         e1000e_update_rdt_wa(rx_ring, i);
 892                 else
 893                         writel(i, rx_ring->tail);
 894         }
 895 }
 896
 897 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
 898                                  struct sk_buff *skb)
 899 {
 900         if (netdev->features & NETIF_F_RXHASH)
 901                 skb->rxhash = le32_to_cpu(rss);
 902 }
 903
 904 /**
 905  * e1000_clean_rx_irq - Send received data up the network stack
 906  * @rx_ring: Rx descriptor ring
 907  *
 908  * the return value indicates whether actual cleaning was done, there
 909  * is no guarantee that everything was cleaned
 910  **/
 911 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
 912                                int work_to_do)
 913 {
 914         struct e1000_adapter *adapter = rx_ring->adapter;
 915         struct net_device *netdev = adapter->netdev;
 916         struct pci_dev *pdev = adapter->pdev;
 917         struct e1000_hw *hw = &adapter->hw;
 918         union e1000_rx_desc_extended *rx_desc, *next_rxd;
 919         struct e1000_buffer *buffer_info, *next_buffer;
 920         u32 length, staterr;
 921         unsigned int i;
 922         int cleaned_count = 0;
 923         bool cleaned = false;
 924         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 925
 926         i = rx_ring->next_to_clean;
 927         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 928         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 929         buffer_info = &rx_ring->buffer_info[i];
 930
 931         while (staterr & E1000_RXD_STAT_DD) {
 932                 struct sk_buff *skb;
 933
 934                 if (*work_done >= work_to_do)
 935                         break;
 936                 (*work_done)++;
 937                 rmb();  /* read descriptor and rx_buffer_info after status DD */
 938
 939                 skb = buffer_info->skb;
 940                 buffer_info->skb = NULL;
 941
 942                 prefetch(skb->data - NET_IP_ALIGN);
 943
 944                 i++;
 945                 if (i == rx_ring->count)
 946                         i = 0;
 947                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
 948                 prefetch(next_rxd);
 949
 950                 next_buffer = &rx_ring->buffer_info[i];
 951
 952                 cleaned = true;
 953                 cleaned_count++;
 954                 dma_unmap_single(&pdev->dev,
 955                                  buffer_info->dma,
 956                                  adapter->rx_buffer_len,
 957                                  DMA_FROM_DEVICE);
 958                 buffer_info->dma = 0;
 959
 960                 length = le16_to_cpu(rx_desc->wb.upper.length);
 961
 962                 /* !EOP means multiple descriptors were used to store a single
 963                  * packet, if that's the case we need to toss it.  In fact, we
 964                  * need to toss every packet with the EOP bit clear and the
 965                  * next frame that _does_ have the EOP bit set, as it is by
 966                  * definition only a frame fragment
 967                  */
 968                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
 969                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 970
 971                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 972                         /* All receives must fit into a single buffer */
 973                         e_dbg("Receive packet consumed multiple buffers\n");
 974                         /* recycle */
 975                         buffer_info->skb = skb;
 976                         if (staterr & E1000_RXD_STAT_EOP)
 977                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 978                         goto next_desc;
 979                 }
 980
 981                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
 982                              !(netdev->features & NETIF_F_RXALL))) {
 983                         /* recycle */
 984                         buffer_info->skb = skb;
 985                         goto next_desc;
 986                 }
 987
 988                 /* adjust length to remove Ethernet CRC */
 989                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
 990                         /* If configured to store CRC, don't subtract FCS,
 991                          * but keep the FCS bytes out of the total_rx_bytes
 992                          * counter
 993                          */
 994                         if (netdev->features & NETIF_F_RXFCS)
 995                                 total_rx_bytes -= 4;
 996                         else
 997                                 length -= 4;
 998                 }
 999
1000                 total_rx_bytes += length;
1001                 total_rx_packets++;
1002
1003                 /* code added for copybreak, this should improve
1004                  * performance for small packets with large amounts
1005                  * of reassembly being done in the stack
1006                  */
1007                 if (length < copybreak) {
1008                         struct sk_buff *new_skb =
1009                             netdev_alloc_skb_ip_align(netdev, length);
1010                         if (new_skb) {
1011                                 skb_copy_to_linear_data_offset(new_skb,
1012                                                                -NET_IP_ALIGN,
1013                                                                (skb->data -
1014                                                                 NET_IP_ALIGN),
1015                                                                (length +
1016                                                                 NET_IP_ALIGN));
1017                                 /* save the skb in buffer_info as good */
1018                                 buffer_info->skb = skb;
1019                                 skb = new_skb;
1020                         }
1021                         /* else just continue with the old one */
1022                 }
1023                 /* end copybreak code */
1024                 skb_put(skb, length);
1025
1026                 /* Receive Checksum Offload */
1027                 e1000_rx_checksum(adapter, staterr, skb);
1028
1029                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1030
1031                 e1000_receive_skb(adapter, netdev, skb, staterr,
1032                                   rx_desc->wb.upper.vlan);
1033
1034 next_desc:
1035                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1036
1037                 /* return some buffers to hardware, one at a time is too slow */
1038                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1039                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1040                                               GFP_ATOMIC);
1041                         cleaned_count = 0;
1042                 }
1043
1044                 /* use prefetched values */
1045                 rx_desc = next_rxd;
1046                 buffer_info = next_buffer;
1047
1048                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1049         }
1050         rx_ring->next_to_clean = i;
1051
1052         cleaned_count = e1000_desc_unused(rx_ring);
1053         if (cleaned_count)
1054                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1055
1056         adapter->total_rx_bytes += total_rx_bytes;
1057         adapter->total_rx_packets += total_rx_packets;
1058         return cleaned;
1059 }
1060
1061 static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1062                             struct e1000_buffer *buffer_info)
1063 {
1064         struct e1000_adapter *adapter = tx_ring->adapter;
1065
1066         if (buffer_info->dma) {
1067                 if (buffer_info->mapped_as_page)
1068                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1069                                        buffer_info->length, DMA_TO_DEVICE);
1070                 else
1071                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1072                                          buffer_info->length, DMA_TO_DEVICE);
1073                 buffer_info->dma = 0;
1074         }
1075         if (buffer_info->skb) {
1076                 dev_kfree_skb_any(buffer_info->skb);
1077                 buffer_info->skb = NULL;
1078         }
1079         buffer_info->time_stamp = 0;
1080 }
1081
1082 static void e1000_print_hw_hang(struct work_struct *work)
1083 {
1084         struct e1000_adapter *adapter = container_of(work,
1085                                                      struct e1000_adapter,
1086                                                      print_hang_task);
1087         struct net_device *netdev = adapter->netdev;
1088         struct e1000_ring *tx_ring = adapter->tx_ring;
1089         unsigned int i = tx_ring->next_to_clean;
1090         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1091         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1092         struct e1000_hw *hw = &adapter->hw;
1093         u16 phy_status, phy_1000t_status, phy_ext_status;
1094         u16 pci_status;
1095
1096         if (test_bit(__E1000_DOWN, &adapter->state))
1097                 return;
1098
1099         if (!adapter->tx_hang_recheck &&
1100             (adapter->flags2 & FLAG2_DMA_BURST)) {
1101                 /* May be block on write-back, flush and detect again
1102                  * flush pending descriptor writebacks to memory
1103                  */
1104                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1105                 /* execute the writes immediately */
1106                 e1e_flush();
1107                 /* Due to rare timing issues, write to TIDV again to ensure
1108                  * the write is successful
1109                  */
1110                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1111                 /* execute the writes immediately */
1112                 e1e_flush();
1113                 adapter->tx_hang_recheck = true;
1114                 return;
1115         }
1116         /* Real hang detected */
1117         adapter->tx_hang_recheck = false;
1118         netif_stop_queue(netdev);
1119
1120         e1e_rphy(hw, PHY_STATUS, &phy_status);
1121         e1e_rphy(hw, PHY_1000T_STATUS, &phy_1000t_status);
1122         e1e_rphy(hw, PHY_EXT_STATUS, &phy_ext_status);
1123
1124         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1125
1126         /* detected Hardware unit hang */
1127         e_err("Detected Hardware Unit Hang:\n"
1128               "  TDH                  <%x>\n"
1129               "  TDT                  <%x>\n"
1130               "  next_to_use          <%x>\n"
1131               "  next_to_clean        <%x>\n"
1132               "buffer_info[next_to_clean]:\n"
1133               "  time_stamp           <%lx>\n"
1134               "  next_to_watch        <%x>\n"
1135               "  jiffies              <%lx>\n"
1136               "  next_to_watch.status <%x>\n"
1137               "MAC Status             <%x>\n"
1138               "PHY Status             <%x>\n"
1139               "PHY 1000BASE-T Status  <%x>\n"
1140               "PHY Extended Status    <%x>\n"
1141               "PCI Status             <%x>\n",
1142               readl(tx_ring->head),
1143               readl(tx_ring->tail),
1144               tx_ring->next_to_use,
1145               tx_ring->next_to_clean,
1146               tx_ring->buffer_info[eop].time_stamp,
1147               eop,
1148               jiffies,
1149               eop_desc->upper.fields.status,
1150               er32(STATUS),
1151               phy_status,
1152               phy_1000t_status,
1153               phy_ext_status,
1154               pci_status);
1155
1156         /* Suggest workaround for known h/w issue */
1157         if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1158                 e_err("Try turning off Tx pause (flow control) via ethtool\n");
1159 }
1160
1161 /**
1162  * e1000e_tx_hwtstamp_work - check for Tx time stamp
1163  * @work: pointer to work struct
1164  *
1165  * This work function polls the TSYNCTXCTL valid bit to determine when a
1166  * timestamp has been taken for the current stored skb.  The timestamp must
1167  * be for this skb because only one such packet is allowed in the queue.
1168  */
1169 static void e1000e_tx_hwtstamp_work(struct work_struct *work)
1170 {
1171         struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
1172                                                      tx_hwtstamp_work);
1173         struct e1000_hw *hw = &adapter->hw;
1174
1175         if (!adapter->tx_hwtstamp_skb)
1176                 return;
1177
1178         if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) {
1179                 struct skb_shared_hwtstamps shhwtstamps;
1180                 u64 txstmp;
1181
1182                 txstmp = er32(TXSTMPL);
1183                 txstmp |= (u64)er32(TXSTMPH) << 32;
1184
1185                 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp);
1186
1187                 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps);
1188                 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1189                 adapter->tx_hwtstamp_skb = NULL;
1190         } else {
1191                 /* reschedule to check later */
1192                 schedule_work(&adapter->tx_hwtstamp_work);
1193         }
1194 }
1195
1196 /**
1197  * e1000_clean_tx_irq - Reclaim resources after transmit completes
1198  * @tx_ring: Tx descriptor ring
1199  *
1200  * the return value indicates whether actual cleaning was done, there
1201  * is no guarantee that everything was cleaned
1202  **/
1203 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
1204 {
1205         struct e1000_adapter *adapter = tx_ring->adapter;
1206         struct net_device *netdev = adapter->netdev;
1207         struct e1000_hw *hw = &adapter->hw;
1208         struct e1000_tx_desc *tx_desc, *eop_desc;
1209         struct e1000_buffer *buffer_info;
1210         unsigned int i, eop;
1211         unsigned int count = 0;
1212         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1213         unsigned int bytes_compl = 0, pkts_compl = 0;
1214
1215         i = tx_ring->next_to_clean;
1216         eop = tx_ring->buffer_info[i].next_to_watch;
1217         eop_desc = E1000_TX_DESC(*tx_ring, eop);
1218
1219         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1220                (count < tx_ring->count)) {
1221                 bool cleaned = false;
1222                 rmb(); /* read buffer_info after eop_desc */
1223                 for (; !cleaned; count++) {
1224                         tx_desc = E1000_TX_DESC(*tx_ring, i);
1225                         buffer_info = &tx_ring->buffer_info[i];
1226                         cleaned = (i == eop);
1227
1228                         if (cleaned) {
1229                                 total_tx_packets += buffer_info->segs;
1230                                 total_tx_bytes += buffer_info->bytecount;
1231                                 if (buffer_info->skb) {
1232                                         bytes_compl += buffer_info->skb->len;
1233                                         pkts_compl++;
1234                                 }
1235                         }
1236
1237                         e1000_put_txbuf(tx_ring, buffer_info);
1238                         tx_desc->upper.data = 0;
1239
1240                         i++;
1241                         if (i == tx_ring->count)
1242                                 i = 0;
1243                 }
1244
1245                 if (i == tx_ring->next_to_use)
1246                         break;
1247                 eop = tx_ring->buffer_info[i].next_to_watch;
1248                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1249         }
1250
1251         tx_ring->next_to_clean = i;
1252
1253         netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1254
1255 #define TX_WAKE_THRESHOLD 32
1256         if (count && netif_carrier_ok(netdev) &&
1257             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1258                 /* Make sure that anybody stopping the queue after this
1259                  * sees the new next_to_clean.
1260                  */
1261                 smp_mb();
1262
1263                 if (netif_queue_stopped(netdev) &&
1264                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1265                         netif_wake_queue(netdev);
1266                         ++adapter->restart_queue;
1267                 }
1268         }
1269
1270         if (adapter->detect_tx_hung) {
1271                 /* Detect a transmit hang in hardware, this serializes the
1272                  * check with the clearing of time_stamp and movement of i
1273                  */
1274                 adapter->detect_tx_hung = false;
1275                 if (tx_ring->buffer_info[i].time_stamp &&
1276                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1277                                + (adapter->tx_timeout_factor * HZ)) &&
1278                     !(er32(STATUS) & E1000_STATUS_TXOFF))
1279                         schedule_work(&adapter->print_hang_task);
1280                 else
1281                         adapter->tx_hang_recheck = false;
1282         }
1283         adapter->total_tx_bytes += total_tx_bytes;
1284         adapter->total_tx_packets += total_tx_packets;
1285         return count < tx_ring->count;
1286 }
1287
1288 /**
1289  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1290  * @rx_ring: Rx descriptor ring
1291  *
1292  * the return value indicates whether actual cleaning was done, there
1293  * is no guarantee that everything was cleaned
1294  **/
1295 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1296                                   int work_to_do)
1297 {
1298         struct e1000_adapter *adapter = rx_ring->adapter;
1299         struct e1000_hw *hw = &adapter->hw;
1300         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1301         struct net_device *netdev = adapter->netdev;
1302         struct pci_dev *pdev = adapter->pdev;
1303         struct e1000_buffer *buffer_info, *next_buffer;
1304         struct e1000_ps_page *ps_page;
1305         struct sk_buff *skb;
1306         unsigned int i, j;
1307         u32 length, staterr;
1308         int cleaned_count = 0;
1309         bool cleaned = false;
1310         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1311
1312         i = rx_ring->next_to_clean;
1313         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1314         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1315         buffer_info = &rx_ring->buffer_info[i];
1316
1317         while (staterr & E1000_RXD_STAT_DD) {
1318                 if (*work_done >= work_to_do)
1319                         break;
1320                 (*work_done)++;
1321                 skb = buffer_info->skb;
1322                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1323
1324                 /* in the packet split case this is header only */
1325                 prefetch(skb->data - NET_IP_ALIGN);
1326
1327                 i++;
1328                 if (i == rx_ring->count)
1329                         i = 0;
1330                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1331                 prefetch(next_rxd);
1332
1333                 next_buffer = &rx_ring->buffer_info[i];
1334
1335                 cleaned = true;
1336                 cleaned_count++;
1337                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1338                                  adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1339                 buffer_info->dma = 0;
1340
1341                 /* see !EOP comment in other Rx routine */
1342                 if (!(staterr & E1000_RXD_STAT_EOP))
1343                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1344
1345                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1346                         e_dbg("Packet Split buffers didn't pick up the full packet\n");
1347                         dev_kfree_skb_irq(skb);
1348                         if (staterr & E1000_RXD_STAT_EOP)
1349                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1350                         goto next_desc;
1351                 }
1352
1353                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1354                              !(netdev->features & NETIF_F_RXALL))) {
1355                         dev_kfree_skb_irq(skb);
1356                         goto next_desc;
1357                 }
1358
1359                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1360
1361                 if (!length) {
1362                         e_dbg("Last part of the packet spanning multiple descriptors\n");
1363                         dev_kfree_skb_irq(skb);
1364                         goto next_desc;
1365                 }
1366
1367                 /* Good Receive */
1368                 skb_put(skb, length);
1369
1370                 {
1371                         /* this looks ugly, but it seems compiler issues make
1372                          * it more efficient than reusing j
1373                          */
1374                         int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1375
1376                         /* page alloc/put takes too long and effects small
1377                          * packet throughput, so unsplit small packets and
1378                          * save the alloc/put only valid in softirq (napi)
1379                          * context to call kmap_*
1380                          */
1381                         if (l1 && (l1 <= copybreak) &&
1382                             ((length + l1) <= adapter->rx_ps_bsize0)) {
1383                                 u8 *vaddr;
1384
1385                                 ps_page = &buffer_info->ps_pages[0];
1386
1387                                 /* there is no documentation about how to call
1388                                  * kmap_atomic, so we can't hold the mapping
1389                                  * very long
1390                                  */
1391                                 dma_sync_single_for_cpu(&pdev->dev,
1392                                                         ps_page->dma,
1393                                                         PAGE_SIZE,
1394                                                         DMA_FROM_DEVICE);
1395                                 vaddr = kmap_atomic(ps_page->page);
1396                                 memcpy(skb_tail_pointer(skb), vaddr, l1);
1397                                 kunmap_atomic(vaddr);
1398                                 dma_sync_single_for_device(&pdev->dev,
1399                                                            ps_page->dma,
1400                                                            PAGE_SIZE,
1401                                                            DMA_FROM_DEVICE);
1402
1403                                 /* remove the CRC */
1404                                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1405                                         if (!(netdev->features & NETIF_F_RXFCS))
1406                                                 l1 -= 4;
1407                                 }
1408
1409                                 skb_put(skb, l1);
1410                                 goto copydone;
1411                         } /* if */
1412                 }
1413
1414                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1415                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1416                         if (!length)
1417                                 break;
1418
1419                         ps_page = &buffer_info->ps_pages[j];
1420                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1421                                        DMA_FROM_DEVICE);
1422                         ps_page->dma = 0;
1423                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1424                         ps_page->page = NULL;
1425                         skb->len += length;
1426                         skb->data_len += length;
1427                         skb->truesize += PAGE_SIZE;
1428                 }
1429
1430                 /* strip the ethernet crc, problem is we're using pages now so
1431                  * this whole operation can get a little cpu intensive
1432                  */
1433                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1434                         if (!(netdev->features & NETIF_F_RXFCS))
1435                                 pskb_trim(skb, skb->len - 4);
1436                 }
1437
1438 copydone:
1439                 total_rx_bytes += skb->len;
1440                 total_rx_packets++;
1441
1442                 e1000_rx_checksum(adapter, staterr, skb);
1443
1444                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1445
1446                 if (rx_desc->wb.upper.header_status &
1447                            cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1448                         adapter->rx_hdr_split++;
1449
1450                 e1000_receive_skb(adapter, netdev, skb, staterr,
1451                                   rx_desc->wb.middle.vlan);
1452
1453 next_desc:
1454                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1455                 buffer_info->skb = NULL;
1456
1457                 /* return some buffers to hardware, one at a time is too slow */
1458                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1459                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1460                                               GFP_ATOMIC);
1461                         cleaned_count = 0;
1462                 }
1463
1464                 /* use prefetched values */
1465                 rx_desc = next_rxd;
1466                 buffer_info = next_buffer;
1467
1468                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1469         }
1470         rx_ring->next_to_clean = i;
1471
1472         cleaned_count = e1000_desc_unused(rx_ring);
1473         if (cleaned_count)
1474                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1475
1476         adapter->total_rx_bytes += total_rx_bytes;
1477         adapter->total_rx_packets += total_rx_packets;
1478         return cleaned;
1479 }
1480
1481 /**
1482  * e1000_consume_page - helper function
1483  **/
1484 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1485                                u16 length)
1486 {
1487         bi->page = NULL;
1488         skb->len += length;
1489         skb->data_len += length;
1490         skb->truesize += PAGE_SIZE;
1491 }
1492
1493 /**
1494  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1495  * @adapter: board private structure
1496  *
1497  * the return value indicates whether actual cleaning was done, there
1498  * is no guarantee that everything was cleaned
1499  **/
1500 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1501                                      int work_to_do)
1502 {
1503         struct e1000_adapter *adapter = rx_ring->adapter;
1504         struct net_device *netdev = adapter->netdev;
1505         struct pci_dev *pdev = adapter->pdev;
1506         union e1000_rx_desc_extended *rx_desc, *next_rxd;
1507         struct e1000_buffer *buffer_info, *next_buffer;
1508         u32 length, staterr;
1509         unsigned int i;
1510         int cleaned_count = 0;
1511         bool cleaned = false;
1512         unsigned int total_rx_bytes=0, total_rx_packets=0;
1513
1514         i = rx_ring->next_to_clean;
1515         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1516         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1517         buffer_info = &rx_ring->buffer_info[i];
1518
1519         while (staterr & E1000_RXD_STAT_DD) {
1520                 struct sk_buff *skb;
1521
1522                 if (*work_done >= work_to_do)
1523                         break;
1524                 (*work_done)++;
1525                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1526
1527                 skb = buffer_info->skb;
1528                 buffer_info->skb = NULL;
1529
1530                 ++i;
1531                 if (i == rx_ring->count)
1532                         i = 0;
1533                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1534                 prefetch(next_rxd);
1535
1536                 next_buffer = &rx_ring->buffer_info[i];
1537
1538                 cleaned = true;
1539                 cleaned_count++;
1540                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1541                                DMA_FROM_DEVICE);
1542                 buffer_info->dma = 0;
1543
1544                 length = le16_to_cpu(rx_desc->wb.upper.length);
1545
1546                 /* errors is only valid for DD + EOP descriptors */
1547                 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1548                              ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1549                               !(netdev->features & NETIF_F_RXALL)))) {
1550                         /* recycle both page and skb */
1551                         buffer_info->skb = skb;
1552                         /* an error means any chain goes out the window too */
1553                         if (rx_ring->rx_skb_top)
1554                                 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1555                         rx_ring->rx_skb_top = NULL;
1556                         goto next_desc;
1557                 }
1558
1559 #define rxtop (rx_ring->rx_skb_top)
1560                 if (!(staterr & E1000_RXD_STAT_EOP)) {
1561                         /* this descriptor is only the beginning (or middle) */
1562                         if (!rxtop) {
1563                                 /* this is the beginning of a chain */
1564                                 rxtop = skb;
1565                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1566                                                    0, length);
1567                         } else {
1568                                 /* this is the middle of a chain */
1569                                 skb_fill_page_desc(rxtop,
1570                                     skb_shinfo(rxtop)->nr_frags,
1571                                     buffer_info->page, 0, length);
1572                                 /* re-use the skb, only consumed the page */
1573                                 buffer_info->skb = skb;
1574                         }
1575                         e1000_consume_page(buffer_info, rxtop, length);
1576                         goto next_desc;
1577                 } else {
1578                         if (rxtop) {
1579                                 /* end of the chain */
1580                                 skb_fill_page_desc(rxtop,
1581                                     skb_shinfo(rxtop)->nr_frags,
1582                                     buffer_info->page, 0, length);
1583                                 /* re-use the current skb, we only consumed the
1584                                  * page
1585                                  */
1586                                 buffer_info->skb = skb;
1587                                 skb = rxtop;
1588                                 rxtop = NULL;
1589                                 e1000_consume_page(buffer_info, skb, length);
1590                         } else {
1591                                 /* no chain, got EOP, this buf is the packet
1592                                  * copybreak to save the put_page/alloc_page
1593                                  */
1594                                 if (length <= copybreak &&
1595                                     skb_tailroom(skb) >= length) {
1596                                         u8 *vaddr;
1597                                         vaddr = kmap_atomic(buffer_info->page);
1598                                         memcpy(skb_tail_pointer(skb), vaddr,
1599                                                length);
1600                                         kunmap_atomic(vaddr);
1601                                         /* re-use the page, so don't erase
1602                                          * buffer_info->page
1603                                          */
1604                                         skb_put(skb, length);
1605                                 } else {
1606                                         skb_fill_page_desc(skb, 0,
1607                                                            buffer_info->page, 0,
1608                                                            length);
1609                                         e1000_consume_page(buffer_info, skb,
1610                                                            length);
1611                                 }
1612                         }
1613                 }
1614
1615                 /* Receive Checksum Offload */
1616                 e1000_rx_checksum(adapter, staterr, skb);
1617
1618                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1619
1620                 /* probably a little skewed due to removing CRC */
1621                 total_rx_bytes += skb->len;
1622                 total_rx_packets++;
1623
1624                 /* eth type trans needs skb->data to point to something */
1625                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1626                         e_err("pskb_may_pull failed.\n");
1627                         dev_kfree_skb_irq(skb);
1628                         goto next_desc;
1629                 }
1630
1631                 e1000_receive_skb(adapter, netdev, skb, staterr,
1632                                   rx_desc->wb.upper.vlan);
1633
1634 next_desc:
1635                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1636
1637                 /* return some buffers to hardware, one at a time is too slow */
1638                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1639                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1640                                               GFP_ATOMIC);
1641                         cleaned_count = 0;
1642                 }
1643
1644                 /* use prefetched values */
1645                 rx_desc = next_rxd;
1646                 buffer_info = next_buffer;
1647
1648                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1649         }
1650         rx_ring->next_to_clean = i;
1651
1652         cleaned_count = e1000_desc_unused(rx_ring);
1653         if (cleaned_count)
1654                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1655
1656         adapter->total_rx_bytes += total_rx_bytes;
1657         adapter->total_rx_packets += total_rx_packets;
1658         return cleaned;
1659 }
1660
1661 /**
1662  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1663  * @rx_ring: Rx descriptor ring
1664  **/
1665 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
1666 {
1667         struct e1000_adapter *adapter = rx_ring->adapter;
1668         struct e1000_buffer *buffer_info;
1669         struct e1000_ps_page *ps_page;
1670         struct pci_dev *pdev = adapter->pdev;
1671         unsigned int i, j;
1672
1673         /* Free all the Rx ring sk_buffs */
1674         for (i = 0; i < rx_ring->count; i++) {
1675                 buffer_info = &rx_ring->buffer_info[i];
1676                 if (buffer_info->dma) {
1677                         if (adapter->clean_rx == e1000_clean_rx_irq)
1678                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1679                                                  adapter->rx_buffer_len,
1680                                                  DMA_FROM_DEVICE);
1681                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1682                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1683                                                PAGE_SIZE,
1684                                                DMA_FROM_DEVICE);
1685                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1686                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1687                                                  adapter->rx_ps_bsize0,
1688                                                  DMA_FROM_DEVICE);
1689                         buffer_info->dma = 0;
1690                 }
1691
1692                 if (buffer_info->page) {
1693                         put_page(buffer_info->page);
1694                         buffer_info->page = NULL;
1695                 }
1696
1697                 if (buffer_info->skb) {
1698                         dev_kfree_skb(buffer_info->skb);
1699                         buffer_info->skb = NULL;
1700                 }
1701
1702                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1703                         ps_page = &buffer_info->ps_pages[j];
1704                         if (!ps_page->page)
1705                                 break;
1706                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1707                                        DMA_FROM_DEVICE);
1708                         ps_page->dma = 0;
1709                         put_page(ps_page->page);
1710                         ps_page->page = NULL;
1711                 }
1712         }
1713
1714         /* there also may be some cached data from a chained receive */
1715         if (rx_ring->rx_skb_top) {
1716                 dev_kfree_skb(rx_ring->rx_skb_top);
1717                 rx_ring->rx_skb_top = NULL;
1718         }
1719
1720         /* Zero out the descriptor ring */
1721         memset(rx_ring->desc, 0, rx_ring->size);
1722
1723         rx_ring->next_to_clean = 0;
1724         rx_ring->next_to_use = 0;
1725         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1726
1727         writel(0, rx_ring->head);
1728         if (rx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
1729                 e1000e_update_rdt_wa(rx_ring, 0);
1730         else
1731                 writel(0, rx_ring->tail);
1732 }
1733
1734 static void e1000e_downshift_workaround(struct work_struct *work)
1735 {
1736         struct e1000_adapter *adapter = container_of(work,
1737                                         struct e1000_adapter, downshift_task);
1738
1739         if (test_bit(__E1000_DOWN, &adapter->state))
1740                 return;
1741
1742         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1743 }
1744
1745 /**
1746  * e1000_intr_msi - Interrupt Handler
1747  * @irq: interrupt number
1748  * @data: pointer to a network interface device structure
1749  **/
1750 static irqreturn_t e1000_intr_msi(int irq, void *data)
1751 {
1752         struct net_device *netdev = data;
1753         struct e1000_adapter *adapter = netdev_priv(netdev);
1754         struct e1000_hw *hw = &adapter->hw;
1755         u32 icr = er32(ICR);
1756
1757         /* read ICR disables interrupts using IAM */
1758         if (icr & E1000_ICR_LSC) {
1759                 hw->mac.get_link_status = true;
1760                 /* ICH8 workaround-- Call gig speed drop workaround on cable
1761                  * disconnect (LSC) before accessing any PHY registers
1762                  */
1763                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1764                     (!(er32(STATUS) & E1000_STATUS_LU)))
1765                         schedule_work(&adapter->downshift_task);
1766
1767                 /* 80003ES2LAN workaround-- For packet buffer work-around on
1768                  * link down event; disable receives here in the ISR and reset
1769                  * adapter in watchdog
1770                  */
1771                 if (netif_carrier_ok(netdev) &&
1772                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1773                         /* disable receives */
1774                         u32 rctl = er32(RCTL);
1775                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1776                         adapter->flags |= FLAG_RESTART_NOW;
1777                 }
1778                 /* guard against interrupt when we're going down */
1779                 if (!test_bit(__E1000_DOWN, &adapter->state))
1780                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1781         }
1782
1783         /* Reset on uncorrectable ECC error */
1784         if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1785                 u32 pbeccsts = er32(PBECCSTS);
1786
1787                 adapter->corr_errors +=
1788                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1789                 adapter->uncorr_errors +=
1790                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1791                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1792
1793                 /* Do the reset outside of interrupt context */
1794                 schedule_work(&adapter->reset_task);
1795
1796                 /* return immediately since reset is imminent */
1797                 return IRQ_HANDLED;
1798         }
1799
1800         if (napi_schedule_prep(&adapter->napi)) {
1801                 adapter->total_tx_bytes = 0;
1802                 adapter->total_tx_packets = 0;
1803                 adapter->total_rx_bytes = 0;
1804                 adapter->total_rx_packets = 0;
1805                 __napi_schedule(&adapter->napi);
1806         }
1807
1808         return IRQ_HANDLED;
1809 }
1810
1811 /**
1812  * e1000_intr - Interrupt Handler
1813  * @irq: interrupt number
1814  * @data: pointer to a network interface device structure
1815  **/
1816 static irqreturn_t e1000_intr(int irq, void *data)
1817 {
1818         struct net_device *netdev = data;
1819         struct e1000_adapter *adapter = netdev_priv(netdev);
1820         struct e1000_hw *hw = &adapter->hw;
1821         u32 rctl, icr = er32(ICR);
1822
1823         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1824                 return IRQ_NONE;  /* Not our interrupt */
1825
1826         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1827          * not set, then the adapter didn't send an interrupt
1828          */
1829         if (!(icr & E1000_ICR_INT_ASSERTED))
1830                 return IRQ_NONE;
1831
1832         /* Interrupt Auto-Mask...upon reading ICR,
1833          * interrupts are masked.  No need for the
1834          * IMC write
1835          */
1836
1837         if (icr & E1000_ICR_LSC) {
1838                 hw->mac.get_link_status = true;
1839                 /* ICH8 workaround-- Call gig speed drop workaround on cable
1840                  * disconnect (LSC) before accessing any PHY registers
1841                  */
1842                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1843                     (!(er32(STATUS) & E1000_STATUS_LU)))
1844                         schedule_work(&adapter->downshift_task);
1845
1846                 /* 80003ES2LAN workaround--
1847                  * For packet buffer work-around on link down event;
1848                  * disable receives here in the ISR and
1849                  * reset adapter in watchdog
1850                  */
1851                 if (netif_carrier_ok(netdev) &&
1852                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1853                         /* disable receives */
1854                         rctl = er32(RCTL);
1855                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1856                         adapter->flags |= FLAG_RESTART_NOW;
1857                 }
1858                 /* guard against interrupt when we're going down */
1859                 if (!test_bit(__E1000_DOWN, &adapter->state))
1860                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1861         }
1862
1863         /* Reset on uncorrectable ECC error */
1864         if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1865                 u32 pbeccsts = er32(PBECCSTS);
1866
1867                 adapter->corr_errors +=
1868                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1869                 adapter->uncorr_errors +=
1870                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1871                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1872
1873                 /* Do the reset outside of interrupt context */
1874                 schedule_work(&adapter->reset_task);
1875
1876                 /* return immediately since reset is imminent */
1877                 return IRQ_HANDLED;
1878         }
1879
1880         if (napi_schedule_prep(&adapter->napi)) {
1881                 adapter->total_tx_bytes = 0;
1882                 adapter->total_tx_packets = 0;
1883                 adapter->total_rx_bytes = 0;
1884                 adapter->total_rx_packets = 0;
1885                 __napi_schedule(&adapter->napi);
1886         }
1887
1888         return IRQ_HANDLED;
1889 }
1890
1891 static irqreturn_t e1000_msix_other(int irq, void *data)
1892 {
1893         struct net_device *netdev = data;
1894         struct e1000_adapter *adapter = netdev_priv(netdev);
1895         struct e1000_hw *hw = &adapter->hw;
1896         u32 icr = er32(ICR);
1897
1898         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1899                 if (!test_bit(__E1000_DOWN, &adapter->state))
1900                         ew32(IMS, E1000_IMS_OTHER);
1901                 return IRQ_NONE;
1902         }
1903
1904         if (icr & adapter->eiac_mask)
1905                 ew32(ICS, (icr & adapter->eiac_mask));
1906
1907         if (icr & E1000_ICR_OTHER) {
1908                 if (!(icr & E1000_ICR_LSC))
1909                         goto no_link_interrupt;
1910                 hw->mac.get_link_status = true;
1911                 /* guard against interrupt when we're going down */
1912                 if (!test_bit(__E1000_DOWN, &adapter->state))
1913                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1914         }
1915
1916 no_link_interrupt:
1917         if (!test_bit(__E1000_DOWN, &adapter->state))
1918                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1919
1920         return IRQ_HANDLED;
1921 }
1922
1923
1924 static irqreturn_t e1000_intr_msix_tx(int irq, void *data)
1925 {
1926         struct net_device *netdev = data;
1927         struct e1000_adapter *adapter = netdev_priv(netdev);
1928         struct e1000_hw *hw = &adapter->hw;
1929         struct e1000_ring *tx_ring = adapter->tx_ring;
1930
1931
1932         adapter->total_tx_bytes = 0;
1933         adapter->total_tx_packets = 0;
1934
1935         if (!e1000_clean_tx_irq(tx_ring))
1936                 /* Ring was not completely cleaned, so fire another interrupt */
1937                 ew32(ICS, tx_ring->ims_val);
1938
1939         return IRQ_HANDLED;
1940 }
1941
1942 static irqreturn_t e1000_intr_msix_rx(int irq, void *data)
1943 {
1944         struct net_device *netdev = data;
1945         struct e1000_adapter *adapter = netdev_priv(netdev);
1946         struct e1000_ring *rx_ring = adapter->rx_ring;
1947
1948         /* Write the ITR value calculated at the end of the
1949          * previous interrupt.
1950          */
1951         if (rx_ring->set_itr) {
1952                 writel(1000000000 / (rx_ring->itr_val * 256),
1953                        rx_ring->itr_register);
1954                 rx_ring->set_itr = 0;
1955         }
1956
1957         if (napi_schedule_prep(&adapter->napi)) {
1958                 adapter->total_rx_bytes = 0;
1959                 adapter->total_rx_packets = 0;
1960                 __napi_schedule(&adapter->napi);
1961         }
1962         return IRQ_HANDLED;
1963 }
1964
1965 /**
1966  * e1000_configure_msix - Configure MSI-X hardware
1967  *
1968  * e1000_configure_msix sets up the hardware to properly
1969  * generate MSI-X interrupts.
1970  **/
1971 static void e1000_configure_msix(struct e1000_adapter *adapter)
1972 {
1973         struct e1000_hw *hw = &adapter->hw;
1974         struct e1000_ring *rx_ring = adapter->rx_ring;
1975         struct e1000_ring *tx_ring = adapter->tx_ring;
1976         int vector = 0;
1977         u32 ctrl_ext, ivar = 0;
1978
1979         adapter->eiac_mask = 0;
1980
1981         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1982         if (hw->mac.type == e1000_82574) {
1983                 u32 rfctl = er32(RFCTL);
1984                 rfctl |= E1000_RFCTL_ACK_DIS;
1985                 ew32(RFCTL, rfctl);
1986         }
1987
1988 #define E1000_IVAR_INT_ALLOC_VALID      0x8
1989         /* Configure Rx vector */
1990         rx_ring->ims_val = E1000_IMS_RXQ0;
1991         adapter->eiac_mask |= rx_ring->ims_val;
1992         if (rx_ring->itr_val)
1993                 writel(1000000000 / (rx_ring->itr_val * 256),
1994                        rx_ring->itr_register);
1995         else
1996                 writel(1, rx_ring->itr_register);
1997         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1998
1999         /* Configure Tx vector */
2000         tx_ring->ims_val = E1000_IMS_TXQ0;
2001         vector++;
2002         if (tx_ring->itr_val)
2003                 writel(1000000000 / (tx_ring->itr_val * 256),
2004                        tx_ring->itr_register);
2005         else
2006                 writel(1, tx_ring->itr_register);
2007         adapter->eiac_mask |= tx_ring->ims_val;
2008         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
2009
2010         /* set vector for Other Causes, e.g. link changes */
2011         vector++;
2012         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
2013         if (rx_ring->itr_val)
2014                 writel(1000000000 / (rx_ring->itr_val * 256),
2015                        hw->hw_addr + E1000_EITR_82574(vector));
2016         else
2017                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
2018
2019         /* Cause Tx interrupts on every write back */
2020         ivar |= (1 << 31);
2021
2022         ew32(IVAR, ivar);
2023
2024         /* enable MSI-X PBA support */
2025         ctrl_ext = er32(CTRL_EXT);
2026         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
2027
2028         /* Auto-Mask Other interrupts upon ICR read */
2029 #define E1000_EIAC_MASK_82574   0x01F00000
2030         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
2031         ctrl_ext |= E1000_CTRL_EXT_EIAME;
2032         ew32(CTRL_EXT, ctrl_ext);
2033         e1e_flush();
2034 }
2035
2036 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
2037 {
2038         if (adapter->msix_entries) {
2039                 pci_disable_msix(adapter->pdev);
2040                 kfree(adapter->msix_entries);
2041                 adapter->msix_entries = NULL;
2042         } else if (adapter->flags & FLAG_MSI_ENABLED) {
2043                 pci_disable_msi(adapter->pdev);
2044                 adapter->flags &= ~FLAG_MSI_ENABLED;
2045         }
2046 }
2047
2048 /**
2049  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
2050  *
2051  * Attempt to configure interrupts using the best available
2052  * capabilities of the hardware and kernel.
2053  **/
2054 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
2055 {
2056         int err;
2057         int i;
2058
2059         switch (adapter->int_mode) {
2060         case E1000E_INT_MODE_MSIX:
2061                 if (adapter->flags & FLAG_HAS_MSIX) {
2062                         adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
2063                         adapter->msix_entries = kcalloc(adapter->num_vectors,
2064                                                       sizeof(struct msix_entry),
2065                                                       GFP_KERNEL);
2066                         if (adapter->msix_entries) {
2067                                 for (i = 0; i < adapter->num_vectors; i++)
2068                                         adapter->msix_entries[i].entry = i;
2069
2070                                 err = pci_enable_msix(adapter->pdev,
2071                                                       adapter->msix_entries,
2072                                                       adapter->num_vectors);
2073                                 if (err == 0)
2074                                         return;
2075                         }
2076                         /* MSI-X failed, so fall through and try MSI */
2077                         e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
2078                         e1000e_reset_interrupt_capability(adapter);
2079                 }
2080                 adapter->int_mode = E1000E_INT_MODE_MSI;
2081                 /* Fall through */
2082         case E1000E_INT_MODE_MSI:
2083                 if (!pci_enable_msi(adapter->pdev)) {
2084                         adapter->flags |= FLAG_MSI_ENABLED;
2085                 } else {
2086                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
2087                         e_err("Failed to initialize MSI interrupts.  Falling back to legacy interrupts.\n");
2088                 }
2089                 /* Fall through */
2090         case E1000E_INT_MODE_LEGACY:
2091                 /* Don't do anything; this is the system default */
2092                 break;
2093         }
2094
2095         /* store the number of vectors being used */
2096         adapter->num_vectors = 1;
2097 }
2098
2099 /**
2100  * e1000_request_msix - Initialize MSI-X interrupts
2101  *
2102  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
2103  * kernel.
2104  **/
2105 static int e1000_request_msix(struct e1000_adapter *adapter)
2106 {
2107         struct net_device *netdev = adapter->netdev;
2108         int err = 0, vector = 0;
2109
2110         if (strlen(netdev->name) < (IFNAMSIZ - 5))
2111                 snprintf(adapter->rx_ring->name,
2112                          sizeof(adapter->rx_ring->name) - 1,
2113                          "%s-rx-0", netdev->name);
2114         else
2115                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
2116         err = request_irq(adapter->msix_entries[vector].vector,
2117                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
2118                           netdev);
2119         if (err)
2120                 return err;
2121         adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2122             E1000_EITR_82574(vector);
2123         adapter->rx_ring->itr_val = adapter->itr;
2124         vector++;
2125
2126         if (strlen(netdev->name) < (IFNAMSIZ - 5))
2127                 snprintf(adapter->tx_ring->name,
2128                          sizeof(adapter->tx_ring->name) - 1,
2129                          "%s-tx-0", netdev->name);
2130         else
2131                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2132         err = request_irq(adapter->msix_entries[vector].vector,
2133                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
2134                           netdev);
2135         if (err)
2136                 return err;
2137         adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2138             E1000_EITR_82574(vector);
2139         adapter->tx_ring->itr_val = adapter->itr;
2140         vector++;
2141
2142         err = request_irq(adapter->msix_entries[vector].vector,
2143                           e1000_msix_other, 0, netdev->name, netdev);
2144         if (err)
2145                 return err;
2146
2147         e1000_configure_msix(adapter);
2148
2149         return 0;
2150 }
2151
2152 /**
2153  * e1000_request_irq - initialize interrupts
2154  *
2155  * Attempts to configure interrupts using the best available
2156  * capabilities of the hardware and kernel.
2157  **/
2158 static int e1000_request_irq(struct e1000_adapter *adapter)
2159 {
2160         struct net_device *netdev = adapter->netdev;
2161         int err;
2162
2163         if (adapter->msix_entries) {
2164                 err = e1000_request_msix(adapter);
2165                 if (!err)
2166                         return err;
2167                 /* fall back to MSI */
2168                 e1000e_reset_interrupt_capability(adapter);
2169                 adapter->int_mode = E1000E_INT_MODE_MSI;
2170                 e1000e_set_interrupt_capability(adapter);
2171         }
2172         if (adapter->flags & FLAG_MSI_ENABLED) {
2173                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
2174                                   netdev->name, netdev);
2175                 if (!err)
2176                         return err;
2177
2178                 /* fall back to legacy interrupt */
2179                 e1000e_reset_interrupt_capability(adapter);
2180                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2181         }
2182
2183         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2184                           netdev->name, netdev);
2185         if (err)
2186                 e_err("Unable to allocate interrupt, Error: %d\n", err);
2187
2188         return err;
2189 }
2190
2191 static void e1000_free_irq(struct e1000_adapter *adapter)
2192 {
2193         struct net_device *netdev = adapter->netdev;
2194
2195         if (adapter->msix_entries) {
2196                 int vector = 0;
2197
2198                 free_irq(adapter->msix_entries[vector].vector, netdev);
2199                 vector++;
2200
2201                 free_irq(adapter->msix_entries[vector].vector, netdev);
2202                 vector++;
2203
2204                 /* Other Causes interrupt vector */
2205                 free_irq(adapter->msix_entries[vector].vector, netdev);
2206                 return;
2207         }
2208
2209         free_irq(adapter->pdev->irq, netdev);
2210 }
2211
2212 /**
2213  * e1000_irq_disable - Mask off interrupt generation on the NIC
2214  **/
2215 static void e1000_irq_disable(struct e1000_adapter *adapter)
2216 {
2217         struct e1000_hw *hw = &adapter->hw;
2218
2219         ew32(IMC, ~0);
2220         if (adapter->msix_entries)
2221                 ew32(EIAC_82574, 0);
2222         e1e_flush();
2223
2224         if (adapter->msix_entries) {
2225                 int i;
2226                 for (i = 0; i < adapter->num_vectors; i++)
2227                         synchronize_irq(adapter->msix_entries[i].vector);
2228         } else {
2229                 synchronize_irq(adapter->pdev->irq);
2230         }
2231 }
2232
2233 /**
2234  * e1000_irq_enable - Enable default interrupt generation settings
2235  **/
2236 static void e1000_irq_enable(struct e1000_adapter *adapter)
2237 {
2238         struct e1000_hw *hw = &adapter->hw;
2239
2240         if (adapter->msix_entries) {
2241                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2242                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2243         } else if (hw->mac.type == e1000_pch_lpt) {
2244                 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
2245         } else {
2246                 ew32(IMS, IMS_ENABLE_MASK);
2247         }
2248         e1e_flush();
2249 }
2250
2251 /**
2252  * e1000e_get_hw_control - get control of the h/w from f/w
2253  * @adapter: address of board private structure
2254  *
2255  * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2256  * For ASF and Pass Through versions of f/w this means that
2257  * the driver is loaded. For AMT version (only with 82573)
2258  * of the f/w this means that the network i/f is open.
2259  **/
2260 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2261 {
2262         struct e1000_hw *hw = &adapter->hw;
2263         u32 ctrl_ext;
2264         u32 swsm;
2265
2266         /* Let firmware know the driver has taken over */
2267         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2268                 swsm = er32(SWSM);
2269                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2270         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2271                 ctrl_ext = er32(CTRL_EXT);
2272                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2273         }
2274 }
2275
2276 /**
2277  * e1000e_release_hw_control - release control of the h/w to f/w
2278  * @adapter: address of board private structure
2279  *
2280  * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2281  * For ASF and Pass Through versions of f/w this means that the
2282  * driver is no longer loaded. For AMT version (only with 82573) i
2283  * of the f/w this means that the network i/f is closed.
2284  *
2285  **/
2286 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2287 {
2288         struct e1000_hw *hw = &adapter->hw;
2289         u32 ctrl_ext;
2290         u32 swsm;
2291
2292         /* Let firmware taken over control of h/w */
2293         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2294                 swsm = er32(SWSM);
2295                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2296         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2297                 ctrl_ext = er32(CTRL_EXT);
2298                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2299         }
2300 }
2301
2302 /**
2303  * e1000_alloc_ring_dma - allocate memory for a ring structure
2304  **/
2305 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2306                                 struct e1000_ring *ring)
2307 {
2308         struct pci_dev *pdev = adapter->pdev;
2309
2310         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2311                                         GFP_KERNEL);
2312         if (!ring->desc)
2313                 return -ENOMEM;
2314
2315         return 0;
2316 }
2317
2318 /**
2319  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2320  * @tx_ring: Tx descriptor ring
2321  *
2322  * Return 0 on success, negative on failure
2323  **/
2324 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
2325 {
2326         struct e1000_adapter *adapter = tx_ring->adapter;
2327         int err = -ENOMEM, size;
2328
2329         size = sizeof(struct e1000_buffer) * tx_ring->count;
2330         tx_ring->buffer_info = vzalloc(size);
2331         if (!tx_ring->buffer_info)
2332                 goto err;
2333
2334         /* round up to nearest 4K */
2335         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2336         tx_ring->size = ALIGN(tx_ring->size, 4096);
2337
2338         err = e1000_alloc_ring_dma(adapter, tx_ring);
2339         if (err)
2340                 goto err;
2341
2342         tx_ring->next_to_use = 0;
2343         tx_ring->next_to_clean = 0;
2344
2345         return 0;
2346 err:
2347         vfree(tx_ring->buffer_info);
2348         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2349         return err;
2350 }
2351
2352 /**
2353  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2354  * @rx_ring: Rx descriptor ring
2355  *
2356  * Returns 0 on success, negative on failure
2357  **/
2358 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
2359 {
2360         struct e1000_adapter *adapter = rx_ring->adapter;
2361         struct e1000_buffer *buffer_info;
2362         int i, size, desc_len, err = -ENOMEM;
2363
2364         size = sizeof(struct e1000_buffer) * rx_ring->count;
2365         rx_ring->buffer_info = vzalloc(size);
2366         if (!rx_ring->buffer_info)
2367                 goto err;
2368
2369         for (i = 0; i < rx_ring->count; i++) {
2370                 buffer_info = &rx_ring->buffer_info[i];
2371                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2372                                                 sizeof(struct e1000_ps_page),
2373                                                 GFP_KERNEL);
2374                 if (!buffer_info->ps_pages)
2375                         goto err_pages;
2376         }
2377
2378         desc_len = sizeof(union e1000_rx_desc_packet_split);
2379
2380         /* Round up to nearest 4K */
2381         rx_ring->size = rx_ring->count * desc_len;
2382         rx_ring->size = ALIGN(rx_ring->size, 4096);
2383
2384         err = e1000_alloc_ring_dma(adapter, rx_ring);
2385         if (err)
2386                 goto err_pages;
2387
2388         rx_ring->next_to_clean = 0;
2389         rx_ring->next_to_use = 0;
2390         rx_ring->rx_skb_top = NULL;
2391
2392         return 0;
2393
2394 err_pages:
2395         for (i = 0; i < rx_ring->count; i++) {
2396                 buffer_info = &rx_ring->buffer_info[i];
2397                 kfree(buffer_info->ps_pages);
2398         }
2399 err:
2400         vfree(rx_ring->buffer_info);
2401         e_err("Unable to allocate memory for the receive descriptor ring\n");
2402         return err;
2403 }
2404
2405 /**
2406  * e1000_clean_tx_ring - Free Tx Buffers
2407  * @tx_ring: Tx descriptor ring
2408  **/
2409 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
2410 {
2411         struct e1000_adapter *adapter = tx_ring->adapter;
2412         struct e1000_buffer *buffer_info;
2413         unsigned long size;
2414         unsigned int i;
2415
2416         for (i = 0; i < tx_ring->count; i++) {
2417                 buffer_info = &tx_ring->buffer_info[i];
2418                 e1000_put_txbuf(tx_ring, buffer_info);
2419         }
2420
2421         netdev_reset_queue(adapter->netdev);
2422         size = sizeof(struct e1000_buffer) * tx_ring->count;
2423         memset(tx_ring->buffer_info, 0, size);
2424
2425         memset(tx_ring->desc, 0, tx_ring->size);
2426
2427         tx_ring->next_to_use = 0;
2428         tx_ring->next_to_clean = 0;
2429
2430         writel(0, tx_ring->head);
2431         if (tx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
2432                 e1000e_update_tdt_wa(tx_ring, 0);
2433         else
2434                 writel(0, tx_ring->tail);
2435 }
2436
2437 /**
2438  * e1000e_free_tx_resources - Free Tx Resources per Queue
2439  * @tx_ring: Tx descriptor ring
2440  *
2441  * Free all transmit software resources
2442  **/
2443 void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
2444 {
2445         struct e1000_adapter *adapter = tx_ring->adapter;
2446         struct pci_dev *pdev = adapter->pdev;
2447
2448         e1000_clean_tx_ring(tx_ring);
2449
2450         vfree(tx_ring->buffer_info);
2451         tx_ring->buffer_info = NULL;
2452
2453         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2454                           tx_ring->dma);
2455         tx_ring->desc = NULL;
2456 }
2457
2458 /**
2459  * e1000e_free_rx_resources - Free Rx Resources
2460  * @rx_ring: Rx descriptor ring
2461  *
2462  * Free all receive software resources
2463  **/
2464 void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
2465 {
2466         struct e1000_adapter *adapter = rx_ring->adapter;
2467         struct pci_dev *pdev = adapter->pdev;
2468         int i;
2469
2470         e1000_clean_rx_ring(rx_ring);
2471
2472         for (i = 0; i < rx_ring->count; i++)
2473                 kfree(rx_ring->buffer_info[i].ps_pages);
2474
2475         vfree(rx_ring->buffer_info);
2476         rx_ring->buffer_info = NULL;
2477
2478         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2479                           rx_ring->dma);
2480         rx_ring->desc = NULL;
2481 }
2482
2483 /**
2484  * e1000_update_itr - update the dynamic ITR value based on statistics
2485  * @adapter: pointer to adapter
2486  * @itr_setting: current adapter->itr
2487  * @packets: the number of packets during this measurement interval
2488  * @bytes: the number of bytes during this measurement interval
2489  *
2490  *      Stores a new ITR value based on packets and byte
2491  *      counts during the last interrupt.  The advantage of per interrupt
2492  *      computation is faster updates and more accurate ITR for the current
2493  *      traffic pattern.  Constants in this function were computed
2494  *      based on theoretical maximum wire speed and thresholds were set based
2495  *      on testing data as well as attempting to minimize response time
2496  *      while increasing bulk throughput.  This functionality is controlled
2497  *      by the InterruptThrottleRate module parameter.
2498  **/
2499 static unsigned int e1000_update_itr(struct e1000_adapter *adapter,
2500                                      u16 itr_setting, int packets,
2501                                      int bytes)
2502 {
2503         unsigned int retval = itr_setting;
2504
2505         if (packets == 0)
2506                 return itr_setting;
2507
2508         switch (itr_setting) {
2509         case lowest_latency:
2510                 /* handle TSO and jumbo frames */
2511                 if (bytes/packets > 8000)
2512                         retval = bulk_latency;
2513                 else if ((packets < 5) && (bytes > 512))
2514                         retval = low_latency;
2515                 break;
2516         case low_latency:  /* 50 usec aka 20000 ints/s */
2517                 if (bytes > 10000) {
2518                         /* this if handles the TSO accounting */
2519                         if (bytes/packets > 8000)
2520                                 retval = bulk_latency;
2521                         else if ((packets < 10) || ((bytes/packets) > 1200))
2522                                 retval = bulk_latency;
2523                         else if ((packets > 35))
2524                                 retval = lowest_latency;
2525                 } else if (bytes/packets > 2000) {
2526                         retval = bulk_latency;
2527                 } else if (packets <= 2 && bytes < 512) {
2528                         retval = lowest_latency;
2529                 }
2530                 break;
2531         case bulk_latency: /* 250 usec aka 4000 ints/s */
2532                 if (bytes > 25000) {
2533                         if (packets > 35)
2534                                 retval = low_latency;
2535                 } else if (bytes < 6000) {
2536                         retval = low_latency;
2537                 }
2538                 break;
2539         }
2540
2541         return retval;
2542 }
2543
2544 static void e1000_set_itr(struct e1000_adapter *adapter)
2545 {
2546         u16 current_itr;
2547         u32 new_itr = adapter->itr;
2548
2549         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2550         if (adapter->link_speed != SPEED_1000) {
2551                 current_itr = 0;
2552                 new_itr = 4000;
2553                 goto set_itr_now;
2554         }
2555
2556         if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2557                 new_itr = 0;
2558                 goto set_itr_now;
2559         }
2560
2561         adapter->tx_itr = e1000_update_itr(adapter,
2562                                     adapter->tx_itr,
2563                                     adapter->total_tx_packets,
2564                                     adapter->total_tx_bytes);
2565         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2566         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2567                 adapter->tx_itr = low_latency;
2568
2569         adapter->rx_itr = e1000_update_itr(adapter,
2570                                     adapter->rx_itr,
2571                                     adapter->total_rx_packets,
2572                                     adapter->total_rx_bytes);
2573         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2574         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2575                 adapter->rx_itr = low_latency;
2576
2577         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2578
2579         switch (current_itr) {
2580         /* counts and packets in update_itr are dependent on these numbers */
2581         case lowest_latency:
2582                 new_itr = 70000;
2583                 break;
2584         case low_latency:
2585                 new_itr = 20000; /* aka hwitr = ~200 */
2586                 break;
2587         case bulk_latency:
2588                 new_itr = 4000;
2589                 break;
2590         default:
2591                 break;
2592         }
2593
2594 set_itr_now:
2595         if (new_itr != adapter->itr) {
2596                 /* this attempts to bias the interrupt rate towards Bulk
2597                  * by adding intermediate steps when interrupt rate is
2598                  * increasing
2599                  */
2600                 new_itr = new_itr > adapter->itr ?
2601                              min(adapter->itr + (new_itr >> 2), new_itr) :
2602                              new_itr;
2603                 adapter->itr = new_itr;
2604                 adapter->rx_ring->itr_val = new_itr;
2605                 if (adapter->msix_entries)
2606                         adapter->rx_ring->set_itr = 1;
2607                 else
2608                         e1000e_write_itr(adapter, new_itr);
2609         }
2610 }
2611
2612 /**
2613  * e1000e_write_itr - write the ITR value to the appropriate registers
2614  * @adapter: address of board private structure
2615  * @itr: new ITR value to program
2616  *
2617  * e1000e_write_itr determines if the adapter is in MSI-X mode
2618  * and, if so, writes the EITR registers with the ITR value.
2619  * Otherwise, it writes the ITR value into the ITR register.
2620  **/
2621 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr)
2622 {
2623         struct e1000_hw *hw = &adapter->hw;
2624         u32 new_itr = itr ? 1000000000 / (itr * 256) : 0;
2625
2626         if (adapter->msix_entries) {
2627                 int vector;
2628
2629                 for (vector = 0; vector < adapter->num_vectors; vector++)
2630                         writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector));
2631         } else {
2632                 ew32(ITR, new_itr);
2633         }
2634 }
2635
2636 /**
2637  * e1000_alloc_queues - Allocate memory for all rings
2638  * @adapter: board private structure to initialize
2639  **/
2640 static int e1000_alloc_queues(struct e1000_adapter *adapter)
2641 {
2642         int size = sizeof(struct e1000_ring);
2643
2644         adapter->tx_ring = kzalloc(size, GFP_KERNEL);
2645         if (!adapter->tx_ring)
2646                 goto err;
2647         adapter->tx_ring->count = adapter->tx_ring_count;
2648         adapter->tx_ring->adapter = adapter;
2649
2650         adapter->rx_ring = kzalloc(size, GFP_KERNEL);
2651         if (!adapter->rx_ring)
2652                 goto err;
2653         adapter->rx_ring->count = adapter->rx_ring_count;
2654         adapter->rx_ring->adapter = adapter;
2655
2656         return 0;
2657 err:
2658         e_err("Unable to allocate memory for queues\n");
2659         kfree(adapter->rx_ring);
2660         kfree(adapter->tx_ring);
2661         return -ENOMEM;
2662 }
2663
2664 /**
2665  * e1000e_poll - NAPI Rx polling callback
2666  * @napi: struct associated with this polling callback
2667  * @weight: number of packets driver is allowed to process this poll
2668  **/
2669 static int e1000e_poll(struct napi_struct *napi, int weight)
2670 {
2671         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2672                                                      napi);
2673         struct e1000_hw *hw = &adapter->hw;
2674         struct net_device *poll_dev = adapter->netdev;
2675         int tx_cleaned = 1, work_done = 0;
2676
2677         adapter = netdev_priv(poll_dev);
2678
2679         if (!adapter->msix_entries ||
2680             (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2681                 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
2682
2683         adapter->clean_rx(adapter->rx_ring, &work_done, weight);
2684
2685         if (!tx_cleaned)
2686                 work_done = weight;
2687
2688         /* If weight not fully consumed, exit the polling mode */
2689         if (work_done < weight) {
2690                 if (adapter->itr_setting & 3)
2691                         e1000_set_itr(adapter);
2692                 napi_complete(napi);
2693                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2694                         if (adapter->msix_entries)
2695                                 ew32(IMS, adapter->rx_ring->ims_val);
2696                         else
2697                                 e1000_irq_enable(adapter);
2698                 }
2699         }
2700
2701         return work_done;
2702 }
2703
2704 static int e1000_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2705 {
2706         struct e1000_adapter *adapter = netdev_priv(netdev);
2707         struct e1000_hw *hw = &adapter->hw;
2708         u32 vfta, index;
2709
2710         /* don't update vlan cookie if already programmed */
2711         if ((adapter->hw.mng_cookie.status &
2712              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2713             (vid == adapter->mng_vlan_id))
2714                 return 0;
2715
2716         /* add VID to filter table */
2717         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2718                 index = (vid >> 5) & 0x7F;
2719                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2720                 vfta |= (1 << (vid & 0x1F));
2721                 hw->mac.ops.write_vfta(hw, index, vfta);
2722         }
2723
2724         set_bit(vid, adapter->active_vlans);
2725
2726         return 0;
2727 }
2728
2729 static int e1000_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2730 {
2731         struct e1000_adapter *adapter = netdev_priv(netdev);
2732         struct e1000_hw *hw = &adapter->hw;
2733         u32 vfta, index;
2734
2735         if ((adapter->hw.mng_cookie.status &
2736              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2737             (vid == adapter->mng_vlan_id)) {
2738                 /* release control to f/w */
2739                 e1000e_release_hw_control(adapter);
2740                 return 0;
2741         }
2742
2743         /* remove VID from filter table */
2744         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2745                 index = (vid >> 5) & 0x7F;
2746                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2747                 vfta &= ~(1 << (vid & 0x1F));
2748                 hw->mac.ops.write_vfta(hw, index, vfta);
2749         }
2750
2751         clear_bit(vid, adapter->active_vlans);
2752
2753         return 0;
2754 }
2755
2756 /**
2757  * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2758  * @adapter: board private structure to initialize
2759  **/
2760 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2761 {
2762         struct net_device *netdev = adapter->netdev;
2763         struct e1000_hw *hw = &adapter->hw;
2764         u32 rctl;
2765
2766         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2767                 /* disable VLAN receive filtering */
2768                 rctl = er32(RCTL);
2769                 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2770                 ew32(RCTL, rctl);
2771
2772                 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2773                         e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
2774                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2775                 }
2776         }
2777 }
2778
2779 /**
2780  * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2781  * @adapter: board private structure to initialize
2782  **/
2783 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2784 {
2785         struct e1000_hw *hw = &adapter->hw;
2786         u32 rctl;
2787
2788         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2789                 /* enable VLAN receive filtering */
2790                 rctl = er32(RCTL);
2791                 rctl |= E1000_RCTL_VFE;
2792                 rctl &= ~E1000_RCTL_CFIEN;
2793                 ew32(RCTL, rctl);
2794         }
2795 }
2796
2797 /**
2798  * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2799  * @adapter: board private structure to initialize
2800  **/
2801 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2802 {
2803         struct e1000_hw *hw = &adapter->hw;
2804         u32 ctrl;
2805
2806         /* disable VLAN tag insert/strip */
2807         ctrl = er32(CTRL);
2808         ctrl &= ~E1000_CTRL_VME;
2809         ew32(CTRL, ctrl);
2810 }
2811
2812 /**
2813  * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2814  * @adapter: board private structure to initialize
2815  **/
2816 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2817 {
2818         struct e1000_hw *hw = &adapter->hw;
2819         u32 ctrl;
2820
2821         /* enable VLAN tag insert/strip */
2822         ctrl = er32(CTRL);
2823         ctrl |= E1000_CTRL_VME;
2824         ew32(CTRL, ctrl);
2825 }
2826
2827 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2828 {
2829         struct net_device *netdev = adapter->netdev;
2830         u16 vid = adapter->hw.mng_cookie.vlan_id;
2831         u16 old_vid = adapter->mng_vlan_id;
2832
2833         if (adapter->hw.mng_cookie.status &
2834             E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2835                 e1000_vlan_rx_add_vid(netdev, vid);
2836                 adapter->mng_vlan_id = vid;
2837         }
2838
2839         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2840                 e1000_vlan_rx_kill_vid(netdev, old_vid);
2841 }
2842
2843 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2844 {
2845         u16 vid;
2846
2847         e1000_vlan_rx_add_vid(adapter->netdev, 0);
2848
2849         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2850                 e1000_vlan_rx_add_vid(adapter->netdev, vid);
2851 }
2852
2853 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2854 {
2855         struct e1000_hw *hw = &adapter->hw;
2856         u32 manc, manc2h, mdef, i, j;
2857
2858         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2859                 return;
2860
2861         manc = er32(MANC);
2862
2863         /* enable receiving management packets to the host. this will probably
2864          * generate destination unreachable messages from the host OS, but
2865          * the packets will be handled on SMBUS
2866          */
2867         manc |= E1000_MANC_EN_MNG2HOST;
2868         manc2h = er32(MANC2H);
2869
2870         switch (hw->mac.type) {
2871         default:
2872                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2873                 break;
2874         case e1000_82574:
2875         case e1000_82583:
2876                 /* Check if IPMI pass-through decision filter already exists;
2877                  * if so, enable it.
2878                  */
2879                 for (i = 0, j = 0; i < 8; i++) {
2880                         mdef = er32(MDEF(i));
2881
2882                         /* Ignore filters with anything other than IPMI ports */
2883                         if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2884                                 continue;
2885
2886                         /* Enable this decision filter in MANC2H */
2887                         if (mdef)
2888                                 manc2h |= (1 << i);
2889
2890                         j |= mdef;
2891                 }
2892
2893                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2894                         break;
2895
2896                 /* Create new decision filter in an empty filter */
2897                 for (i = 0, j = 0; i < 8; i++)
2898                         if (er32(MDEF(i)) == 0) {
2899                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2900                                                E1000_MDEF_PORT_664));
2901                                 manc2h |= (1 << 1);
2902                                 j++;
2903                                 break;
2904                         }
2905
2906                 if (!j)
2907                         e_warn("Unable to create IPMI pass-through filter\n");
2908                 break;
2909         }
2910
2911         ew32(MANC2H, manc2h);
2912         ew32(MANC, manc);
2913 }
2914
2915 /**
2916  * e1000_configure_tx - Configure Transmit Unit after Reset
2917  * @adapter: board private structure
2918  *
2919  * Configure the Tx unit of the MAC after a reset.
2920  **/
2921 static void e1000_configure_tx(struct e1000_adapter *adapter)
2922 {
2923         struct e1000_hw *hw = &adapter->hw;
2924         struct e1000_ring *tx_ring = adapter->tx_ring;
2925         u64 tdba;
2926         u32 tdlen, tarc;
2927
2928         /* Setup the HW Tx Head and Tail descriptor pointers */
2929         tdba = tx_ring->dma;
2930         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2931         ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2932         ew32(TDBAH(0), (tdba >> 32));
2933         ew32(TDLEN(0), tdlen);
2934         ew32(TDH(0), 0);
2935         ew32(TDT(0), 0);
2936         tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2937         tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
2938
2939         /* Set the Tx Interrupt Delay register */
2940         ew32(TIDV, adapter->tx_int_delay);
2941         /* Tx irq moderation */
2942         ew32(TADV, adapter->tx_abs_int_delay);
2943
2944         if (adapter->flags2 & FLAG2_DMA_BURST) {
2945                 u32 txdctl = er32(TXDCTL(0));
2946                 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2947                             E1000_TXDCTL_WTHRESH);
2948                 /* set up some performance related parameters to encourage the
2949                  * hardware to use the bus more efficiently in bursts, depends
2950                  * on the tx_int_delay to be enabled,
2951                  * wthresh = 1 ==> burst write is disabled to avoid Tx stalls
2952                  * hthresh = 1 ==> prefetch when one or more available
2953                  * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2954                  * BEWARE: this seems to work but should be considered first if
2955                  * there are Tx hangs or other Tx related bugs
2956                  */
2957                 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2958                 ew32(TXDCTL(0), txdctl);
2959         }
2960         /* erratum work around: set txdctl the same for both queues */
2961         ew32(TXDCTL(1), er32(TXDCTL(0)));
2962
2963         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2964                 tarc = er32(TARC(0));
2965                 /* set the speed mode bit, we'll clear it if we're not at
2966                  * gigabit link later
2967                  */
2968 #define SPEED_MODE_BIT (1 << 21)
2969                 tarc |= SPEED_MODE_BIT;
2970                 ew32(TARC(0), tarc);
2971         }
2972
2973         /* errata: program both queues to unweighted RR */
2974         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2975                 tarc = er32(TARC(0));
2976                 tarc |= 1;
2977                 ew32(TARC(0), tarc);
2978                 tarc = er32(TARC(1));
2979                 tarc |= 1;
2980                 ew32(TARC(1), tarc);
2981         }
2982
2983         /* Setup Transmit Descriptor Settings for eop descriptor */
2984         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2985
2986         /* only set IDE if we are delaying interrupts using the timers */
2987         if (adapter->tx_int_delay)
2988                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2989
2990         /* enable Report Status bit */
2991         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2992
2993         hw->mac.ops.config_collision_dist(hw);
2994 }
2995
2996 /**
2997  * e1000_setup_rctl - configure the receive control registers
2998  * @adapter: Board private structure
2999  **/
3000 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
3001                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
3002 static void e1000_setup_rctl(struct e1000_adapter *adapter)
3003 {
3004         struct e1000_hw *hw = &adapter->hw;
3005         u32 rctl, rfctl;
3006         u32 pages = 0;
3007
3008         /* Workaround Si errata on PCHx - configure jumbo frame flow */
3009         if (hw->mac.type >= e1000_pch2lan) {
3010                 s32 ret_val;
3011
3012                 if (adapter->netdev->mtu > ETH_DATA_LEN)
3013                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
3014                 else
3015                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
3016
3017                 if (ret_val)
3018                         e_dbg("failed to enable jumbo frame workaround mode\n");
3019         }
3020
3021         /* Program MC offset vector base */
3022         rctl = er32(RCTL);
3023         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
3024         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
3025                 E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
3026                 (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
3027
3028         /* Do not Store bad packets */
3029         rctl &= ~E1000_RCTL_SBP;
3030
3031         /* Enable Long Packet receive */
3032         if (adapter->netdev->mtu <= ETH_DATA_LEN)
3033                 rctl &= ~E1000_RCTL_LPE;
3034         else
3035                 rctl |= E1000_RCTL_LPE;
3036
3037         /* Some systems expect that the CRC is included in SMBUS traffic. The
3038          * hardware strips the CRC before sending to both SMBUS (BMC) and to
3039          * host memory when this is enabled
3040          */
3041         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
3042                 rctl |= E1000_RCTL_SECRC;
3043
3044         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
3045         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
3046                 u16 phy_data;
3047
3048                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
3049                 phy_data &= 0xfff8;
3050                 phy_data |= (1 << 2);
3051                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
3052
3053                 e1e_rphy(hw, 22, &phy_data);
3054                 phy_data &= 0x0fff;
3055                 phy_data |= (1 << 14);
3056                 e1e_wphy(hw, 0x10, 0x2823);
3057                 e1e_wphy(hw, 0x11, 0x0003);
3058                 e1e_wphy(hw, 22, phy_data);
3059         }
3060
3061         /* Setup buffer sizes */
3062         rctl &= ~E1000_RCTL_SZ_4096;
3063         rctl |= E1000_RCTL_BSEX;
3064         switch (adapter->rx_buffer_len) {
3065         case 2048:
3066         default:
3067                 rctl |= E1000_RCTL_SZ_2048;
3068                 rctl &= ~E1000_RCTL_BSEX;
3069                 break;
3070         case 4096:
3071                 rctl |= E1000_RCTL_SZ_4096;
3072                 break;
3073         case 8192:
3074                 rctl |= E1000_RCTL_SZ_8192;
3075                 break;
3076         case 16384:
3077                 rctl |= E1000_RCTL_SZ_16384;
3078                 break;
3079         }
3080
3081         /* Enable Extended Status in all Receive Descriptors */
3082         rfctl = er32(RFCTL);
3083         rfctl |= E1000_RFCTL_EXTEN;
3084         ew32(RFCTL, rfctl);
3085
3086         /* 82571 and greater support packet-split where the protocol
3087          * header is placed in skb->data and the packet data is
3088          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
3089          * In the case of a non-split, skb->data is linearly filled,
3090          * followed by the page buffers.  Therefore, skb->data is
3091          * sized to hold the largest protocol header.
3092          *
3093          * allocations using alloc_page take too long for regular MTU
3094          * so only enable packet split for jumbo frames
3095          *
3096          * Using pages when the page size is greater than 16k wastes
3097          * a lot of memory, since we allocate 3 pages at all times
3098          * per packet.
3099          */
3100         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
3101         if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
3102                 adapter->rx_ps_pages = pages;
3103         else
3104                 adapter->rx_ps_pages = 0;
3105
3106         if (adapter->rx_ps_pages) {
3107                 u32 psrctl = 0;
3108
3109                 /* Enable Packet split descriptors */
3110                 rctl |= E1000_RCTL_DTYP_PS;
3111
3112                 psrctl |= adapter->rx_ps_bsize0 >>
3113                         E1000_PSRCTL_BSIZE0_SHIFT;
3114
3115                 switch (adapter->rx_ps_pages) {
3116                 case 3:
3117                         psrctl |= PAGE_SIZE <<
3118                                 E1000_PSRCTL_BSIZE3_SHIFT;
3119                 case 2:
3120                         psrctl |= PAGE_SIZE <<
3121                                 E1000_PSRCTL_BSIZE2_SHIFT;
3122                 case 1:
3123                         psrctl |= PAGE_SIZE >>
3124                                 E1000_PSRCTL_BSIZE1_SHIFT;
3125                         break;
3126                 }
3127
3128                 ew32(PSRCTL, psrctl);
3129         }
3130
3131         /* This is useful for sniffing bad packets. */
3132         if (adapter->netdev->features & NETIF_F_RXALL) {
3133                 /* UPE and MPE will be handled by normal PROMISC logic
3134                  * in e1000e_set_rx_mode
3135                  */
3136                 rctl |= (E1000_RCTL_SBP | /* Receive bad packets */
3137                          E1000_RCTL_BAM | /* RX All Bcast Pkts */
3138                          E1000_RCTL_PMCF); /* RX All MAC Ctrl Pkts */
3139
3140                 rctl &= ~(E1000_RCTL_VFE | /* Disable VLAN filter */
3141                           E1000_RCTL_DPF | /* Allow filtered pause */
3142                           E1000_RCTL_CFIEN); /* Dis VLAN CFIEN Filter */
3143                 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3144                  * and that breaks VLANs.
3145                  */
3146         }
3147
3148         ew32(RCTL, rctl);
3149         /* just started the receive unit, no need to restart */
3150         adapter->flags &= ~FLAG_RESTART_NOW;
3151 }
3152
3153 /**
3154  * e1000_configure_rx - Configure Receive Unit after Reset
3155  * @adapter: board private structure
3156  *
3157  * Configure the Rx unit of the MAC after a reset.
3158  **/
3159 static void e1000_configure_rx(struct e1000_adapter *adapter)
3160 {
3161         struct e1000_hw *hw = &adapter->hw;
3162         struct e1000_ring *rx_ring = adapter->rx_ring;
3163         u64 rdba;
3164         u32 rdlen, rctl, rxcsum, ctrl_ext;
3165
3166         if (adapter->rx_ps_pages) {
3167                 /* this is a 32 byte descriptor */
3168                 rdlen = rx_ring->count *
3169                     sizeof(union e1000_rx_desc_packet_split);
3170                 adapter->clean_rx = e1000_clean_rx_irq_ps;
3171                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
3172         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
3173                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3174                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3175                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
3176         } else {
3177                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3178                 adapter->clean_rx = e1000_clean_rx_irq;
3179                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3180         }
3181
3182         /* disable receives while setting up the descriptors */
3183         rctl = er32(RCTL);
3184         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3185                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3186         e1e_flush();
3187         usleep_range(10000, 20000);
3188
3189         if (adapter->flags2 & FLAG2_DMA_BURST) {
3190                 /* set the writeback threshold (only takes effect if the RDTR
3191                  * is set). set GRAN=1 and write back up to 0x4 worth, and
3192                  * enable prefetching of 0x20 Rx descriptors
3193                  * granularity = 01
3194                  * wthresh = 04,
3195                  * hthresh = 04,
3196                  * pthresh = 0x20
3197                  */
3198                 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3199                 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3200
3201                 /* override the delay timers for enabling bursting, only if
3202                  * the value was not set by the user via module options
3203                  */
3204                 if (adapter->rx_int_delay == DEFAULT_RDTR)
3205                         adapter->rx_int_delay = BURST_RDTR;
3206                 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3207                         adapter->rx_abs_int_delay = BURST_RADV;
3208         }
3209
3210         /* set the Receive Delay Timer Register */
3211         ew32(RDTR, adapter->rx_int_delay);
3212
3213         /* irq moderation */
3214         ew32(RADV, adapter->rx_abs_int_delay);
3215         if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3216                 e1000e_write_itr(adapter, adapter->itr);
3217
3218         ctrl_ext = er32(CTRL_EXT);
3219         /* Auto-Mask interrupts upon ICR access */
3220         ctrl_ext |= E1000_CTRL_EXT_IAME;
3221         ew32(IAM, 0xffffffff);
3222         ew32(CTRL_EXT, ctrl_ext);
3223         e1e_flush();
3224
3225         /* Setup the HW Rx Head and Tail Descriptor Pointers and
3226          * the Base and Length of the Rx Descriptor Ring
3227          */
3228         rdba = rx_ring->dma;
3229         ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3230         ew32(RDBAH(0), (rdba >> 32));
3231         ew32(RDLEN(0), rdlen);
3232         ew32(RDH(0), 0);
3233         ew32(RDT(0), 0);
3234         rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3235         rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
3236
3237         /* Enable Receive Checksum Offload for TCP and UDP */
3238         rxcsum = er32(RXCSUM);
3239         if (adapter->netdev->features & NETIF_F_RXCSUM)
3240                 rxcsum |= E1000_RXCSUM_TUOFL;
3241         else
3242                 rxcsum &= ~E1000_RXCSUM_TUOFL;
3243         ew32(RXCSUM, rxcsum);
3244
3245         if (adapter->hw.mac.type == e1000_pch2lan) {
3246                 /* With jumbo frames, excessive C-state transition
3247                  * latencies result in dropped transactions.
3248                  */
3249                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3250                         u32 rxdctl = er32(RXDCTL(0));
3251                         ew32(RXDCTL(0), rxdctl | 0x3);
3252                         pm_qos_update_request(&adapter->netdev->pm_qos_req, 55);
3253                 } else {
3254                         pm_qos_update_request(&adapter->netdev->pm_qos_req,
3255                                               PM_QOS_DEFAULT_VALUE);
3256                 }
3257         }
3258
3259         /* Enable Receives */
3260         ew32(RCTL, rctl);
3261 }
3262
3263 /**
3264  * e1000e_write_mc_addr_list - write multicast addresses to MTA
3265  * @netdev: network interface device structure
3266  *
3267  * Writes multicast address list to the MTA hash table.
3268  * Returns: -ENOMEM on failure
3269  *                0 on no addresses written
3270  *                X on writing X addresses to MTA
3271  */
3272 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3273 {
3274         struct e1000_adapter *adapter = netdev_priv(netdev);
3275         struct e1000_hw *hw = &adapter->hw;
3276         struct netdev_hw_addr *ha;
3277         u8 *mta_list;
3278         int i;
3279
3280         if (netdev_mc_empty(netdev)) {
3281                 /* nothing to program, so clear mc list */
3282                 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3283                 return 0;
3284         }
3285
3286         mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3287         if (!mta_list)
3288                 return -ENOMEM;
3289
3290         /* update_mc_addr_list expects a packed array of only addresses. */
3291         i = 0;
3292         netdev_for_each_mc_addr(ha, netdev)
3293                 memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3294
3295         hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3296         kfree(mta_list);
3297
3298         return netdev_mc_count(netdev);
3299 }
3300
3301 /**
3302  * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3303  * @netdev: network interface device structure
3304  *
3305  * Writes unicast address list to the RAR table.
3306  * Returns: -ENOMEM on failure/insufficient address space
3307  *                0 on no addresses written
3308  *                X on writing X addresses to the RAR table
3309  **/
3310 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3311 {
3312         struct e1000_adapter *adapter = netdev_priv(netdev);
3313         struct e1000_hw *hw = &adapter->hw;
3314         unsigned int rar_entries = hw->mac.rar_entry_count;
3315         int count = 0;
3316
3317         /* save a rar entry for our hardware address */
3318         rar_entries--;
3319
3320         /* save a rar entry for the LAA workaround */
3321         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3322                 rar_entries--;
3323
3324         /* return ENOMEM indicating insufficient memory for addresses */
3325         if (netdev_uc_count(netdev) > rar_entries)
3326                 return -ENOMEM;
3327
3328         if (!netdev_uc_empty(netdev) && rar_entries) {
3329                 struct netdev_hw_addr *ha;
3330
3331                 /* write the addresses in reverse order to avoid write
3332                  * combining
3333                  */
3334                 netdev_for_each_uc_addr(ha, netdev) {
3335                         if (!rar_entries)
3336                                 break;
3337                         hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3338                         count++;
3339                 }
3340         }
3341
3342         /* zero out the remaining RAR entries not used above */
3343         for (; rar_entries > 0; rar_entries--) {
3344                 ew32(RAH(rar_entries), 0);
3345                 ew32(RAL(rar_entries), 0);
3346         }
3347         e1e_flush();
3348
3349         return count;
3350 }
3351
3352 /**
3353  * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3354  * @netdev: network interface device structure
3355  *
3356  * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3357  * address list or the network interface flags are updated.  This routine is
3358  * responsible for configuring the hardware for proper unicast, multicast,
3359  * promiscuous mode, and all-multi behavior.
3360  **/
3361 static void e1000e_set_rx_mode(struct net_device *netdev)
3362 {
3363         struct e1000_adapter *adapter = netdev_priv(netdev);
3364         struct e1000_hw *hw = &adapter->hw;
3365         u32 rctl;
3366
3367         /* Check for Promiscuous and All Multicast modes */
3368         rctl = er32(RCTL);
3369
3370         /* clear the affected bits */
3371         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3372
3373         if (netdev->flags & IFF_PROMISC) {
3374                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3375                 /* Do not hardware filter VLANs in promisc mode */
3376                 e1000e_vlan_filter_disable(adapter);
3377         } else {
3378                 int count;
3379
3380                 if (netdev->flags & IFF_ALLMULTI) {
3381                         rctl |= E1000_RCTL_MPE;
3382                 } else {
3383                         /* Write addresses to the MTA, if the attempt fails
3384                          * then we should just turn on promiscuous mode so
3385                          * that we can at least receive multicast traffic
3386                          */
3387                         count = e1000e_write_mc_addr_list(netdev);
3388                         if (count < 0)
3389                                 rctl |= E1000_RCTL_MPE;
3390                 }
3391                 e1000e_vlan_filter_enable(adapter);
3392                 /* Write addresses to available RAR registers, if there is not
3393                  * sufficient space to store all the addresses then enable
3394                  * unicast promiscuous mode
3395                  */
3396                 count = e1000e_write_uc_addr_list(netdev);
3397                 if (count < 0)
3398                         rctl |= E1000_RCTL_UPE;
3399         }
3400
3401         ew32(RCTL, rctl);
3402
3403         if (netdev->features & NETIF_F_HW_VLAN_RX)
3404                 e1000e_vlan_strip_enable(adapter);
3405         else
3406                 e1000e_vlan_strip_disable(adapter);
3407 }
3408
3409 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3410 {
3411         struct e1000_hw *hw = &adapter->hw;
3412         u32 mrqc, rxcsum;
3413         int i;
3414         static const u32 rsskey[10] = {
3415                 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3416                 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3417         };
3418
3419         /* Fill out hash function seed */
3420         for (i = 0; i < 10; i++)
3421                 ew32(RSSRK(i), rsskey[i]);
3422
3423         /* Direct all traffic to queue 0 */
3424         for (i = 0; i < 32; i++)
3425                 ew32(RETA(i), 0);
3426
3427         /* Disable raw packet checksumming so that RSS hash is placed in
3428          * descriptor on writeback.
3429          */
3430         rxcsum = er32(RXCSUM);
3431         rxcsum |= E1000_RXCSUM_PCSD;
3432
3433         ew32(RXCSUM, rxcsum);
3434
3435         mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3436                 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3437                 E1000_MRQC_RSS_FIELD_IPV6 |
3438                 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3439                 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3440
3441         ew32(MRQC, mrqc);
3442 }
3443
3444 /**
3445  * e1000e_get_base_timinca - get default SYSTIM time increment attributes
3446  * @adapter: board private structure
3447  * @timinca: pointer to returned time increment attributes
3448  *
3449  * Get attributes for incrementing the System Time Register SYSTIML/H at
3450  * the default base frequency, and set the cyclecounter shift value.
3451  **/
3452 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
3453 {
3454         struct e1000_hw *hw = &adapter->hw;
3455         u32 incvalue, incperiod, shift;
3456
3457         /* Make sure clock is enabled on I217 before checking the frequency */
3458         if ((hw->mac.type == e1000_pch_lpt) &&
3459             !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) &&
3460             !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) {
3461                 u32 fextnvm7 = er32(FEXTNVM7);
3462
3463                 if (!(fextnvm7 & (1 << 0))) {
3464                         ew32(FEXTNVM7, fextnvm7 | (1 << 0));
3465                         e1e_flush();
3466                 }
3467         }
3468
3469         switch (hw->mac.type) {
3470         case e1000_pch2lan:
3471         case e1000_pch_lpt:
3472                 /* On I217, the clock frequency is 25MHz or 96MHz as
3473                  * indicated by the System Clock Frequency Indication
3474                  */
3475                 if ((hw->mac.type != e1000_pch_lpt) ||
3476                     (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
3477                         /* Stable 96MHz frequency */
3478                         incperiod = INCPERIOD_96MHz;
3479                         incvalue = INCVALUE_96MHz;
3480                         shift = INCVALUE_SHIFT_96MHz;
3481                         adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
3482                         break;
3483                 }
3484                 /* fall-through */
3485         case e1000_82574:
3486         case e1000_82583:
3487                 /* Stable 25MHz frequency */
3488                 incperiod = INCPERIOD_25MHz;
3489                 incvalue = INCVALUE_25MHz;
3490                 shift = INCVALUE_SHIFT_25MHz;
3491                 adapter->cc.shift = shift;
3492                 break;
3493         default:
3494                 return -EINVAL;
3495         }
3496
3497         *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) |
3498                     ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK));
3499
3500         return 0;
3501 }
3502
3503 /**
3504  * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable
3505  * @adapter: board private structure
3506  *
3507  * Outgoing time stamping can be enabled and disabled. Play nice and
3508  * disable it when requested, although it shouldn't cause any overhead
3509  * when no packet needs it. At most one packet in the queue may be
3510  * marked for time stamping, otherwise it would be impossible to tell
3511  * for sure to which packet the hardware time stamp belongs.
3512  *
3513  * Incoming time stamping has to be configured via the hardware filters.
3514  * Not all combinations are supported, in particular event type has to be
3515  * specified. Matching the kind of event packet is not supported, with the
3516  * exception of "all V2 events regardless of level 2 or 4".
3517  **/
3518 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
3519 {
3520         struct e1000_hw *hw = &adapter->hw;
3521         struct hwtstamp_config *config = &adapter->hwtstamp_config;
3522         u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
3523         u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
3524         u32 rxmtrl = 0;
3525         u16 rxudp = 0;
3526         bool is_l4 = false;
3527         bool is_l2 = false;
3528         u32 regval;
3529         s32 ret_val;
3530
3531         if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
3532                 return -EINVAL;
3533
3534         /* flags reserved for future extensions - must be zero */
3535         if (config->flags)
3536                 return -EINVAL;
3537
3538         switch (config->tx_type) {
3539         case HWTSTAMP_TX_OFF:
3540                 tsync_tx_ctl = 0;
3541                 break;
3542         case HWTSTAMP_TX_ON:
3543                 break;
3544         default:
3545                 return -ERANGE;
3546         }
3547
3548         switch (config->rx_filter) {
3549         case HWTSTAMP_FILTER_NONE:
3550                 tsync_rx_ctl = 0;
3551                 break;
3552         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3553                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3554                 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
3555                 is_l4 = true;
3556                 break;
3557         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3558                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3559                 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
3560                 is_l4 = true;
3561                 break;
3562         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3563                 /* Also time stamps V2 L2 Path Delay Request/Response */
3564                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3565                 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3566                 is_l2 = true;
3567                 break;
3568         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3569                 /* Also time stamps V2 L2 Path Delay Request/Response. */
3570                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3571                 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3572                 is_l2 = true;
3573                 break;
3574         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3575                 /* Hardware cannot filter just V2 L4 Sync messages;
3576                  * fall-through to V2 (both L2 and L4) Sync.
3577                  */
3578         case HWTSTAMP_FILTER_PTP_V2_SYNC:
3579                 /* Also time stamps V2 Path Delay Request/Response. */
3580                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3581                 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3582                 is_l2 = true;
3583                 is_l4 = true;
3584                 break;
3585         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3586                 /* Hardware cannot filter just V2 L4 Delay Request messages;
3587                  * fall-through to V2 (both L2 and L4) Delay Request.
3588                  */
3589         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3590                 /* Also time stamps V2 Path Delay Request/Response. */
3591                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3592                 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3593                 is_l2 = true;
3594                 is_l4 = true;
3595                 break;
3596         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3597         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3598                 /* Hardware cannot filter just V2 L4 or L2 Event messages;
3599                  * fall-through to all V2 (both L2 and L4) Events.
3600                  */
3601         case HWTSTAMP_FILTER_PTP_V2_EVENT:
3602                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
3603                 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
3604                 is_l2 = true;
3605                 is_l4 = true;
3606                 break;
3607         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3608                 /* For V1, the hardware can only filter Sync messages or
3609                  * Delay Request messages but not both so fall-through to
3610                  * time stamp all packets.
3611                  */
3612         case HWTSTAMP_FILTER_ALL:
3613                 is_l2 = true;
3614                 is_l4 = true;
3615                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
3616                 config->rx_filter = HWTSTAMP_FILTER_ALL;
3617                 break;
3618         default:
3619                 return -ERANGE;
3620         }
3621
3622         /* enable/disable Tx h/w time stamping */
3623         regval = er32(TSYNCTXCTL);
3624         regval &= ~E1000_TSYNCTXCTL_ENABLED;
3625         regval |= tsync_tx_ctl;
3626         ew32(TSYNCTXCTL, regval);
3627         if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) !=
3628             (regval & E1000_TSYNCTXCTL_ENABLED)) {
3629                 e_err("Timesync Tx Control register not set as expected\n");
3630                 return -EAGAIN;
3631         }
3632
3633         /* enable/disable Rx h/w time stamping */
3634         regval = er32(TSYNCRXCTL);
3635         regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
3636         regval |= tsync_rx_ctl;
3637         ew32(TSYNCRXCTL, regval);
3638         if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED |
3639                                  E1000_TSYNCRXCTL_TYPE_MASK)) !=
3640             (regval & (E1000_TSYNCRXCTL_ENABLED |
3641                        E1000_TSYNCRXCTL_TYPE_MASK))) {
3642                 e_err("Timesync Rx Control register not set as expected\n");
3643                 return -EAGAIN;
3644         }
3645
3646         /* L2: define ethertype filter for time stamped packets */
3647         if (is_l2)
3648                 rxmtrl |= ETH_P_1588;
3649
3650         /* define which PTP packets get time stamped */
3651         ew32(RXMTRL, rxmtrl);
3652
3653         /* Filter by destination port */
3654         if (is_l4) {
3655                 rxudp = PTP_EV_PORT;
3656                 cpu_to_be16s(&rxudp);
3657         }
3658         ew32(RXUDP, rxudp);
3659
3660         e1e_flush();
3661
3662         /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
3663         regval = er32(RXSTMPH);
3664         regval = er32(TXSTMPH);
3665
3666         /* Get and set the System Time Register SYSTIM base frequency */
3667         ret_val = e1000e_get_base_timinca(adapter, &regval);
3668         if (ret_val)
3669                 return ret_val;
3670         ew32(TIMINCA, regval);
3671
3672         /* reset the ns time counter */
3673         timecounter_init(&adapter->tc, &adapter->cc,
3674                          ktime_to_ns(ktime_get_real()));
3675
3676         return 0;
3677 }
3678
3679 /**
3680  * e1000_configure - configure the hardware for Rx and Tx
3681  * @adapter: private board structure
3682  **/
3683 static void e1000_configure(struct e1000_adapter *adapter)
3684 {
3685         struct e1000_ring *rx_ring = adapter->rx_ring;
3686
3687         e1000e_set_rx_mode(adapter->netdev);
3688
3689         e1000_restore_vlan(adapter);
3690         e1000_init_manageability_pt(adapter);
3691
3692         e1000_configure_tx(adapter);
3693
3694         if (adapter->netdev->features & NETIF_F_RXHASH)
3695                 e1000e_setup_rss_hash(adapter);
3696         e1000_setup_rctl(adapter);
3697         e1000_configure_rx(adapter);
3698         adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
3699 }
3700
3701 /**
3702  * e1000e_power_up_phy - restore link in case the phy was powered down
3703  * @adapter: address of board private structure
3704  *
3705  * The phy may be powered down to save power and turn off link when the
3706  * driver is unloaded and wake on lan is not enabled (among others)
3707  * *** this routine MUST be followed by a call to e1000e_reset ***
3708  **/
3709 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3710 {
3711         if (adapter->hw.phy.ops.power_up)
3712                 adapter->hw.phy.ops.power_up(&adapter->hw);
3713
3714         adapter->hw.mac.ops.setup_link(&adapter->hw);
3715 }
3716
3717 /**
3718  * e1000_power_down_phy - Power down the PHY
3719  *
3720  * Power down the PHY so no link is implied when interface is down.
3721  * The PHY cannot be powered down if management or WoL is active.
3722  */
3723 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3724 {
3725         /* WoL is enabled */
3726         if (adapter->wol)
3727                 return;
3728
3729         if (adapter->hw.phy.ops.power_down)
3730                 adapter->hw.phy.ops.power_down(&adapter->hw);
3731 }
3732
3733 /**
3734  * e1000e_reset - bring the hardware into a known good state
3735  *
3736  * This function boots the hardware and enables some settings that
3737  * require a configuration cycle of the hardware - those cannot be
3738  * set/changed during runtime. After reset the device needs to be
3739  * properly configured for Rx, Tx etc.
3740  */
3741 void e1000e_reset(struct e1000_adapter *adapter)
3742 {
3743         struct e1000_mac_info *mac = &adapter->hw.mac;
3744         struct e1000_fc_info *fc = &adapter->hw.fc;
3745         struct e1000_hw *hw = &adapter->hw;
3746         u32 tx_space, min_tx_space, min_rx_space;
3747         u32 pba = adapter->pba;
3748         u16 hwm;
3749
3750         /* reset Packet Buffer Allocation to default */
3751         ew32(PBA, pba);
3752
3753         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3754                 /* To maintain wire speed transmits, the Tx FIFO should be
3755                  * large enough to accommodate two full transmit packets,
3756                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3757                  * the Rx FIFO should be large enough to accommodate at least
3758                  * one full receive packet and is similarly rounded up and
3759                  * expressed in KB.
3760                  */
3761                 pba = er32(PBA);
3762                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3763                 tx_space = pba >> 16;
3764                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3765                 pba &= 0xffff;
3766                 /* the Tx fifo also stores 16 bytes of information about the Tx
3767                  * but don't include ethernet FCS because hardware appends it
3768                  */
3769                 min_tx_space = (adapter->max_frame_size +
3770                                 sizeof(struct e1000_tx_desc) -
3771                                 ETH_FCS_LEN) * 2;
3772                 min_tx_space = ALIGN(min_tx_space, 1024);
3773                 min_tx_space >>= 10;
3774                 /* software strips receive CRC, so leave room for it */
3775                 min_rx_space = adapter->max_frame_size;
3776                 min_rx_space = ALIGN(min_rx_space, 1024);
3777                 min_rx_space >>= 10;
3778
3779                 /* If current Tx allocation is less than the min Tx FIFO size,
3780                  * and the min Tx FIFO size is less than the current Rx FIFO
3781                  * allocation, take space away from current Rx allocation
3782                  */
3783                 if ((tx_space < min_tx_space) &&
3784                     ((min_tx_space - tx_space) < pba)) {
3785                         pba -= min_tx_space - tx_space;
3786
3787                         /* if short on Rx space, Rx wins and must trump Tx
3788                          * adjustment
3789                          */
3790                         if (pba < min_rx_space)
3791                                 pba = min_rx_space;
3792                 }
3793
3794                 ew32(PBA, pba);
3795         }
3796
3797         /* flow control settings
3798          *
3799          * The high water mark must be low enough to fit one full frame
3800          * (or the size used for early receive) above it in the Rx FIFO.
3801          * Set it to the lower of:
3802          * - 90% of the Rx FIFO size, and
3803          * - the full Rx FIFO size minus one full frame
3804          */
3805         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3806                 fc->pause_time = 0xFFFF;
3807         else
3808                 fc->pause_time = E1000_FC_PAUSE_TIME;
3809         fc->send_xon = true;
3810         fc->current_mode = fc->requested_mode;
3811
3812         switch (hw->mac.type) {
3813         case e1000_ich9lan:
3814         case e1000_ich10lan:
3815                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3816                         pba = 14;
3817                         ew32(PBA, pba);
3818                         fc->high_water = 0x2800;
3819                         fc->low_water = fc->high_water - 8;
3820                         break;
3821                 }
3822                 /* fall-through */
3823         default:
3824                 hwm = min(((pba << 10) * 9 / 10),
3825                           ((pba << 10) - adapter->max_frame_size));
3826
3827                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3828                 fc->low_water = fc->high_water - 8;
3829                 break;
3830         case e1000_pchlan:
3831                 /* Workaround PCH LOM adapter hangs with certain network
3832                  * loads.  If hangs persist, try disabling Tx flow control.
3833                  */
3834                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3835                         fc->high_water = 0x3500;
3836                         fc->low_water  = 0x1500;
3837                 } else {
3838                         fc->high_water = 0x5000;
3839                         fc->low_water  = 0x3000;
3840                 }
3841                 fc->refresh_time = 0x1000;
3842                 break;
3843         case e1000_pch2lan:
3844         case e1000_pch_lpt:
3845                 fc->refresh_time = 0x0400;
3846
3847                 if (adapter->netdev->mtu <= ETH_DATA_LEN) {
3848                         fc->high_water = 0x05C20;
3849                         fc->low_water = 0x05048;
3850                         fc->pause_time = 0x0650;
3851                         break;
3852                 }
3853
3854                 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
3855                 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
3856                 break;
3857         }
3858
3859         /* Alignment of Tx data is on an arbitrary byte boundary with the
3860          * maximum size per Tx descriptor limited only to the transmit
3861          * allocation of the packet buffer minus 96 bytes with an upper
3862          * limit of 24KB due to receive synchronization limitations.
3863          */
3864         adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
3865                                        24 << 10);
3866
3867         /* Disable Adaptive Interrupt Moderation if 2 full packets cannot
3868          * fit in receive buffer.
3869          */
3870         if (adapter->itr_setting & 0x3) {
3871                 if ((adapter->max_frame_size * 2) > (pba << 10)) {
3872                         if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3873                                 dev_info(&adapter->pdev->dev,
3874                                         "Interrupt Throttle Rate turned off\n");
3875                                 adapter->flags2 |= FLAG2_DISABLE_AIM;
3876                                 e1000e_write_itr(adapter, 0);
3877                         }
3878                 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3879                         dev_info(&adapter->pdev->dev,
3880                                  "Interrupt Throttle Rate turned on\n");
3881                         adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3882                         adapter->itr = 20000;
3883                         e1000e_write_itr(adapter, adapter->itr);
3884                 }
3885         }
3886
3887         /* Allow time for pending master requests to run */
3888         mac->ops.reset_hw(hw);
3889
3890         /* For parts with AMT enabled, let the firmware know
3891          * that the network interface is in control
3892          */
3893         if (adapter->flags & FLAG_HAS_AMT)
3894                 e1000e_get_hw_control(adapter);
3895
3896         ew32(WUC, 0);
3897
3898         if (mac->ops.init_hw(hw))
3899                 e_err("Hardware Error\n");
3900
3901         e1000_update_mng_vlan(adapter);
3902
3903         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3904         ew32(VET, ETH_P_8021Q);
3905
3906         e1000e_reset_adaptive(hw);
3907
3908         /* initialize systim and reset the ns time counter */
3909         e1000e_config_hwtstamp(adapter);
3910
3911         if (!netif_running(adapter->netdev) &&
3912             !test_bit(__E1000_TESTING, &adapter->state)) {
3913                 e1000_power_down_phy(adapter);
3914                 return;
3915         }
3916
3917         e1000_get_phy_info(hw);
3918
3919         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3920             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3921                 u16 phy_data = 0;
3922                 /* speed up time to link by disabling smart power down, ignore
3923                  * the return value of this function because there is nothing
3924                  * different we would do if it failed
3925                  */
3926                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3927                 phy_data &= ~IGP02E1000_PM_SPD;
3928                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3929         }
3930 }
3931
3932 int e1000e_up(struct e1000_adapter *adapter)
3933 {
3934         struct e1000_hw *hw = &adapter->hw;
3935
3936         /* hardware has been reset, we need to reload some things */
3937         e1000_configure(adapter);
3938
3939         clear_bit(__E1000_DOWN, &adapter->state);
3940
3941         if (adapter->msix_entries)
3942                 e1000_configure_msix(adapter);
3943         e1000_irq_enable(adapter);
3944
3945         netif_start_queue(adapter->netdev);
3946
3947         /* fire a link change interrupt to start the watchdog */
3948         if (adapter->msix_entries)
3949                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3950         else
3951                 ew32(ICS, E1000_ICS_LSC);
3952
3953         return 0;
3954 }
3955
3956 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3957 {
3958         struct e1000_hw *hw = &adapter->hw;
3959
3960         if (!(adapter->flags2 & FLAG2_DMA_BURST))
3961                 return;
3962
3963         /* flush pending descriptor writebacks to memory */
3964         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3965         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3966
3967         /* execute the writes immediately */
3968         e1e_flush();
3969
3970         /* due to rare timing issues, write to TIDV/RDTR again to ensure the
3971          * write is successful
3972          */
3973         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3974         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3975
3976         /* execute the writes immediately */
3977         e1e_flush();
3978 }
3979
3980 static void e1000e_update_stats(struct e1000_adapter *adapter);
3981
3982 void e1000e_down(struct e1000_adapter *adapter)
3983 {
3984         struct net_device *netdev = adapter->netdev;
3985         struct e1000_hw *hw = &adapter->hw;
3986         u32 tctl, rctl;
3987
3988         /* signal that we're down so the interrupt handler does not
3989          * reschedule our watchdog timer
3990          */
3991         set_bit(__E1000_DOWN, &adapter->state);
3992
3993         /* disable receives in the hardware */
3994         rctl = er32(RCTL);
3995         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3996                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3997         /* flush and sleep below */
3998
3999         netif_stop_queue(netdev);
4000
4001         /* disable transmits in the hardware */
4002         tctl = er32(TCTL);
4003         tctl &= ~E1000_TCTL_EN;
4004         ew32(TCTL, tctl);
4005
4006         /* flush both disables and wait for them to finish */
4007         e1e_flush();
4008         usleep_range(10000, 20000);
4009
4010         e1000_irq_disable(adapter);
4011
4012         del_timer_sync(&adapter->watchdog_timer);
4013         del_timer_sync(&adapter->phy_info_timer);
4014
4015         netif_carrier_off(netdev);
4016
4017         spin_lock(&adapter->stats64_lock);
4018         e1000e_update_stats(adapter);
4019         spin_unlock(&adapter->stats64_lock);
4020
4021         e1000e_flush_descriptors(adapter);
4022         e1000_clean_tx_ring(adapter->tx_ring);
4023         e1000_clean_rx_ring(adapter->rx_ring);
4024
4025         adapter->link_speed = 0;
4026         adapter->link_duplex = 0;
4027
4028         if (!pci_channel_offline(adapter->pdev))
4029                 e1000e_reset(adapter);
4030
4031         /* TODO: for power management, we could drop the link and
4032          * pci_disable_device here.
4033          */
4034 }
4035
4036 void e1000e_reinit_locked(struct e1000_adapter *adapter)
4037 {
4038         might_sleep();
4039         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4040                 usleep_range(1000, 2000);
4041         e1000e_down(adapter);
4042         e1000e_up(adapter);
4043         clear_bit(__E1000_RESETTING, &adapter->state);
4044 }
4045
4046 /**
4047  * e1000e_cyclecounter_read - read raw cycle counter (used by time counter)
4048  * @cc: cyclecounter structure
4049  **/
4050 static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
4051 {
4052         struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter,
4053                                                      cc);
4054         struct e1000_hw *hw = &adapter->hw;
4055         cycle_t systim;
4056
4057         /* latch SYSTIMH on read of SYSTIML */
4058         systim = (cycle_t)er32(SYSTIML);
4059         systim |= (cycle_t)er32(SYSTIMH) << 32;
4060
4061         return systim;
4062 }
4063
4064 /**
4065  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
4066  * @adapter: board private structure to initialize
4067  *
4068  * e1000_sw_init initializes the Adapter private data structure.
4069  * Fields are initialized based on PCI device information and
4070  * OS network device settings (MTU size).
4071  **/
4072 static int e1000_sw_init(struct e1000_adapter *adapter)
4073 {
4074         struct net_device *netdev = adapter->netdev;
4075
4076         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
4077         adapter->rx_ps_bsize0 = 128;
4078         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4079         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
4080         adapter->tx_ring_count = E1000_DEFAULT_TXD;
4081         adapter->rx_ring_count = E1000_DEFAULT_RXD;
4082
4083         spin_lock_init(&adapter->stats64_lock);
4084
4085         e1000e_set_interrupt_capability(adapter);
4086
4087         if (e1000_alloc_queues(adapter))
4088                 return -ENOMEM;
4089
4090         /* Setup hardware time stamping cyclecounter */
4091         if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
4092                 adapter->cc.read = e1000e_cyclecounter_read;
4093                 adapter->cc.mask = CLOCKSOURCE_MASK(64);
4094                 adapter->cc.mult = 1;
4095                 /* cc.shift set in e1000e_get_base_tininca() */
4096
4097                 spin_lock_init(&adapter->systim_lock);
4098                 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work);
4099         }
4100
4101         /* Explicitly disable IRQ since the NIC can be in any state. */
4102         e1000_irq_disable(adapter);
4103
4104         set_bit(__E1000_DOWN, &adapter->state);
4105         return 0;
4106 }
4107
4108 /**
4109  * e1000_intr_msi_test - Interrupt Handler
4110  * @irq: interrupt number
4111  * @data: pointer to a network interface device structure
4112  **/
4113 static irqreturn_t e1000_intr_msi_test(int irq, void *data)
4114 {
4115         struct net_device *netdev = data;
4116         struct e1000_adapter *adapter = netdev_priv(netdev);
4117         struct e1000_hw *hw = &adapter->hw;
4118         u32 icr = er32(ICR);
4119
4120         e_dbg("icr is %08X\n", icr);
4121         if (icr & E1000_ICR_RXSEQ) {
4122                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
4123                 /* Force memory writes to complete before acknowledging the
4124                  * interrupt is handled.
4125                  */
4126                 wmb();
4127         }
4128
4129         return IRQ_HANDLED;
4130 }
4131
4132 /**
4133  * e1000_test_msi_interrupt - Returns 0 for successful test
4134  * @adapter: board private struct
4135  *
4136  * code flow taken from tg3.c
4137  **/
4138 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
4139 {
4140         struct net_device *netdev = adapter->netdev;
4141         struct e1000_hw *hw = &adapter->hw;
4142         int err;
4143
4144         /* poll_enable hasn't been called yet, so don't need disable */
4145         /* clear any pending events */
4146         er32(ICR);
4147
4148         /* free the real vector and request a test handler */
4149         e1000_free_irq(adapter);
4150         e1000e_reset_interrupt_capability(adapter);
4151
4152         /* Assume that the test fails, if it succeeds then the test
4153          * MSI irq handler will unset this flag
4154          */
4155         adapter->flags |= FLAG_MSI_TEST_FAILED;
4156
4157         err = pci_enable_msi(adapter->pdev);
4158         if (err)
4159                 goto msi_test_failed;
4160
4161         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
4162                           netdev->name, netdev);
4163         if (err) {
4164                 pci_disable_msi(adapter->pdev);
4165                 goto msi_test_failed;
4166         }
4167
4168         /* Force memory writes to complete before enabling and firing an
4169          * interrupt.
4170          */
4171         wmb();
4172
4173         e1000_irq_enable(adapter);
4174
4175         /* fire an unusual interrupt on the test handler */
4176         ew32(ICS, E1000_ICS_RXSEQ);
4177         e1e_flush();
4178         msleep(100);
4179
4180         e1000_irq_disable(adapter);
4181
4182         rmb();                  /* read flags after interrupt has been fired */
4183
4184         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
4185                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
4186                 e_info("MSI interrupt test failed, using legacy interrupt.\n");
4187         } else {
4188                 e_dbg("MSI interrupt test succeeded!\n");
4189         }
4190
4191         free_irq(adapter->pdev->irq, netdev);
4192         pci_disable_msi(adapter->pdev);
4193
4194 msi_test_failed:
4195         e1000e_set_interrupt_capability(adapter);
4196         return e1000_request_irq(adapter);
4197 }
4198
4199 /**
4200  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
4201  * @adapter: board private struct
4202  *
4203  * code flow taken from tg3.c, called with e1000 interrupts disabled.
4204  **/
4205 static int e1000_test_msi(struct e1000_adapter *adapter)
4206 {
4207         int err;
4208         u16 pci_cmd;
4209
4210         if (!(adapter->flags & FLAG_MSI_ENABLED))
4211                 return 0;
4212
4213         /* disable SERR in case the MSI write causes a master abort */
4214         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4215         if (pci_cmd & PCI_COMMAND_SERR)
4216                 pci_write_config_word(adapter->pdev, PCI_COMMAND,
4217                                       pci_cmd & ~PCI_COMMAND_SERR);
4218
4219         err = e1000_test_msi_interrupt(adapter);
4220
4221         /* re-enable SERR */
4222         if (pci_cmd & PCI_COMMAND_SERR) {
4223                 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4224                 pci_cmd |= PCI_COMMAND_SERR;
4225                 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
4226         }
4227
4228         return err;
4229 }
4230
4231 /**
4232  * e1000_open - Called when a network interface is made active
4233  * @netdev: network interface device structure
4234  *
4235  * Returns 0 on success, negative value on failure
4236  *
4237  * The open entry point is called when a network interface is made
4238  * active by the system (IFF_UP).  At this point all resources needed
4239  * for transmit and receive operations are allocated, the interrupt
4240  * handler is registered with the OS, the watchdog timer is started,
4241  * and the stack is notified that the interface is ready.
4242  **/
4243 static int e1000_open(struct net_device *netdev)
4244 {
4245         struct e1000_adapter *adapter = netdev_priv(netdev);
4246         struct e1000_hw *hw = &adapter->hw;
4247         struct pci_dev *pdev = adapter->pdev;
4248         int err;
4249
4250         /* disallow open during test */
4251         if (test_bit(__E1000_TESTING, &adapter->state))
4252                 return -EBUSY;
4253
4254         pm_runtime_get_sync(&pdev->dev);
4255
4256         netif_carrier_off(netdev);
4257
4258         /* allocate transmit descriptors */
4259         err = e1000e_setup_tx_resources(adapter->tx_ring);
4260         if (err)
4261                 goto err_setup_tx;
4262
4263         /* allocate receive descriptors */
4264         err = e1000e_setup_rx_resources(adapter->rx_ring);
4265         if (err)
4266                 goto err_setup_rx;
4267
4268         /* If AMT is enabled, let the firmware know that the network
4269          * interface is now open and reset the part to a known state.
4270          */
4271         if (adapter->flags & FLAG_HAS_AMT) {
4272                 e1000e_get_hw_control(adapter);
4273                 e1000e_reset(adapter);
4274         }
4275
4276         e1000e_power_up_phy(adapter);
4277
4278         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4279         if ((adapter->hw.mng_cookie.status &
4280              E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
4281                 e1000_update_mng_vlan(adapter);
4282
4283         /* DMA latency requirement to workaround jumbo issue */
4284         if (adapter->hw.mac.type == e1000_pch2lan)
4285                 pm_qos_add_request(&adapter->netdev->pm_qos_req,
4286                                    PM_QOS_CPU_DMA_LATENCY,
4287                                    PM_QOS_DEFAULT_VALUE);
4288
4289         /* before we allocate an interrupt, we must be ready to handle it.
4290          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
4291          * as soon as we call pci_request_irq, so we have to setup our
4292          * clean_rx handler before we do so.
4293          */
4294         e1000_configure(adapter);
4295
4296         err = e1000_request_irq(adapter);
4297         if (err)
4298                 goto err_req_irq;
4299
4300         /* Work around PCIe errata with MSI interrupts causing some chipsets to
4301          * ignore e1000e MSI messages, which means we need to test our MSI
4302          * interrupt now
4303          */
4304         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
4305                 err = e1000_test_msi(adapter);
4306                 if (err) {
4307                         e_err("Interrupt allocation failed\n");
4308                         goto err_req_irq;
4309                 }
4310         }
4311
4312         /* From here on the code is the same as e1000e_up() */
4313         clear_bit(__E1000_DOWN, &adapter->state);
4314
4315         napi_enable(&adapter->napi);
4316
4317         e1000_irq_enable(adapter);
4318
4319         adapter->tx_hang_recheck = false;
4320         netif_start_queue(netdev);
4321
4322         adapter->idle_check = true;
4323         pm_runtime_put(&pdev->dev);
4324
4325         /* fire a link status change interrupt to start the watchdog */
4326         if (adapter->msix_entries)
4327                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
4328         else
4329                 ew32(ICS, E1000_ICS_LSC);
4330
4331         return 0;
4332
4333 err_req_irq:
4334         e1000e_release_hw_control(adapter);
4335         e1000_power_down_phy(adapter);
4336         e1000e_free_rx_resources(adapter->rx_ring);
4337 err_setup_rx:
4338         e1000e_free_tx_resources(adapter->tx_ring);
4339 err_setup_tx:
4340         e1000e_reset(adapter);
4341         pm_runtime_put_sync(&pdev->dev);
4342
4343         return err;
4344 }
4345
4346 /**
4347  * e1000_close - Disables a network interface
4348  * @netdev: network interface device structure
4349  *
4350  * Returns 0, this is not allowed to fail
4351  *
4352  * The close entry point is called when an interface is de-activated
4353  * by the OS.  The hardware is still under the drivers control, but
4354  * needs to be disabled.  A global MAC reset is issued to stop the
4355  * hardware, and all transmit and receive resources are freed.
4356  **/
4357 static int e1000_close(struct net_device *netdev)
4358 {
4359         struct e1000_adapter *adapter = netdev_priv(netdev);
4360         struct pci_dev *pdev = adapter->pdev;
4361         int count = E1000_CHECK_RESET_COUNT;
4362
4363         while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
4364                 usleep_range(10000, 20000);
4365
4366         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4367
4368         pm_runtime_get_sync(&pdev->dev);
4369
4370         napi_disable(&adapter->napi);
4371
4372         if (!test_bit(__E1000_DOWN, &adapter->state)) {
4373                 e1000e_down(adapter);
4374                 e1000_free_irq(adapter);
4375         }
4376         e1000_power_down_phy(adapter);
4377
4378         e1000e_free_tx_resources(adapter->tx_ring);
4379         e1000e_free_rx_resources(adapter->rx_ring);
4380
4381         /* kill manageability vlan ID if supported, but not if a vlan with
4382          * the same ID is registered on the host OS (let 8021q kill it)
4383          */
4384         if (adapter->hw.mng_cookie.status &
4385             E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
4386                 e1000_vlan_rx_kill_vid(netdev, adapter->mng_vlan_id);
4387
4388         /* If AMT is enabled, let the firmware know that the network
4389          * interface is now closed
4390          */
4391         if ((adapter->flags & FLAG_HAS_AMT) &&
4392             !test_bit(__E1000_TESTING, &adapter->state))
4393                 e1000e_release_hw_control(adapter);
4394
4395         if (adapter->hw.mac.type == e1000_pch2lan)
4396                 pm_qos_remove_request(&adapter->netdev->pm_qos_req);
4397
4398         pm_runtime_put_sync(&pdev->dev);
4399
4400         return 0;
4401 }
4402 /**
4403  * e1000_set_mac - Change the Ethernet Address of the NIC
4404  * @netdev: network interface device structure
4405  * @p: pointer to an address structure
4406  *
4407  * Returns 0 on success, negative on failure
4408  **/
4409 static int e1000_set_mac(struct net_device *netdev, void *p)
4410 {
4411         struct e1000_adapter *adapter = netdev_priv(netdev);
4412         struct e1000_hw *hw = &adapter->hw;
4413         struct sockaddr *addr = p;
4414
4415         if (!is_valid_ether_addr(addr->sa_data))
4416                 return -EADDRNOTAVAIL;
4417
4418         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4419         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4420
4421         hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
4422
4423         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4424                 /* activate the work around */
4425                 e1000e_set_laa_state_82571(&adapter->hw, 1);
4426
4427                 /* Hold a copy of the LAA in RAR[14] This is done so that
4428                  * between the time RAR[0] gets clobbered  and the time it
4429                  * gets fixed (in e1000_watchdog), the actual LAA is in one
4430                  * of the RARs and no incoming packets directed to this port
4431                  * are dropped. Eventually the LAA will be in RAR[0] and
4432                  * RAR[14]
4433                  */
4434                 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4435                                     adapter->hw.mac.rar_entry_count - 1);
4436         }
4437
4438         return 0;
4439 }
4440
4441 /**
4442  * e1000e_update_phy_task - work thread to update phy
4443  * @work: pointer to our work struct
4444  *
4445  * this worker thread exists because we must acquire a
4446  * semaphore to read the phy, which we could msleep while
4447  * waiting for it, and we can't msleep in a timer.
4448  **/
4449 static void e1000e_update_phy_task(struct work_struct *work)
4450 {
4451         struct e1000_adapter *adapter = container_of(work,
4452                                         struct e1000_adapter, update_phy_task);
4453
4454         if (test_bit(__E1000_DOWN, &adapter->state))
4455                 return;
4456
4457         e1000_get_phy_info(&adapter->hw);
4458 }
4459
4460 /**
4461  * e1000_update_phy_info - timre call-back to update PHY info
4462  * @data: pointer to adapter cast into an unsigned long
4463  *
4464  * Need to wait a few seconds after link up to get diagnostic information from
4465  * the phy
4466  **/
4467 static void e1000_update_phy_info(unsigned long data)
4468 {
4469         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4470
4471         if (test_bit(__E1000_DOWN, &adapter->state))
4472                 return;
4473
4474         schedule_work(&adapter->update_phy_task);
4475 }
4476
4477 /**
4478  * e1000e_update_phy_stats - Update the PHY statistics counters
4479  * @adapter: board private structure
4480  *
4481  * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4482  **/
4483 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4484 {
4485         struct e1000_hw *hw = &adapter->hw;
4486         s32 ret_val;
4487         u16 phy_data;
4488
4489         ret_val = hw->phy.ops.acquire(hw);
4490         if (ret_val)
4491                 return;
4492
4493         /* A page set is expensive so check if already on desired page.
4494          * If not, set to the page with the PHY status registers.
4495          */
4496         hw->phy.addr = 1;
4497         ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4498                                            &phy_data);
4499         if (ret_val)
4500                 goto release;
4501         if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4502                 ret_val = hw->phy.ops.set_page(hw,
4503                                                HV_STATS_PAGE << IGP_PAGE_SHIFT);
4504                 if (ret_val)
4505                         goto release;
4506         }
4507
4508         /* Single Collision Count */
4509         hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4510         ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4511         if (!ret_val)
4512                 adapter->stats.scc += phy_data;
4513
4514         /* Excessive Collision Count */
4515         hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4516         ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4517         if (!ret_val)
4518                 adapter->stats.ecol += phy_data;
4519
4520         /* Multiple Collision Count */
4521         hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4522         ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4523         if (!ret_val)
4524                 adapter->stats.mcc += phy_data;
4525
4526         /* Late Collision Count */
4527         hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4528         ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4529         if (!ret_val)
4530                 adapter->stats.latecol += phy_data;
4531
4532         /* Collision Count - also used for adaptive IFS */
4533         hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4534         ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4535         if (!ret_val)
4536                 hw->mac.collision_delta = phy_data;
4537
4538         /* Defer Count */
4539         hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4540         ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4541         if (!ret_val)
4542                 adapter->stats.dc += phy_data;
4543
4544         /* Transmit with no CRS */
4545         hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4546         ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4547         if (!ret_val)
4548                 adapter->stats.tncrs += phy_data;
4549
4550 release:
4551         hw->phy.ops.release(hw);
4552 }
4553
4554 /**
4555  * e1000e_update_stats - Update the board statistics counters
4556  * @adapter: board private structure
4557  **/
4558 static void e1000e_update_stats(struct e1000_adapter *adapter)
4559 {
4560         struct net_device *netdev = adapter->netdev;
4561         struct e1000_hw *hw = &adapter->hw;
4562         struct pci_dev *pdev = adapter->pdev;
4563
4564         /* Prevent stats update while adapter is being reset, or if the pci
4565          * connection is down.
4566          */
4567         if (adapter->link_speed == 0)
4568                 return;
4569         if (pci_channel_offline(pdev))
4570                 return;
4571
4572         adapter->stats.crcerrs += er32(CRCERRS);
4573         adapter->stats.gprc += er32(GPRC);
4574         adapter->stats.gorc += er32(GORCL);
4575         er32(GORCH); /* Clear gorc */
4576         adapter->stats.bprc += er32(BPRC);
4577         adapter->stats.mprc += er32(MPRC);
4578         adapter->stats.roc += er32(ROC);
4579
4580         adapter->stats.mpc += er32(MPC);
4581
4582         /* Half-duplex statistics */
4583         if (adapter->link_duplex == HALF_DUPLEX) {
4584                 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4585                         e1000e_update_phy_stats(adapter);
4586                 } else {
4587                         adapter->stats.scc += er32(SCC);
4588                         adapter->stats.ecol += er32(ECOL);
4589                         adapter->stats.mcc += er32(MCC);
4590                         adapter->stats.latecol += er32(LATECOL);
4591                         adapter->stats.dc += er32(DC);
4592
4593                         hw->mac.collision_delta = er32(COLC);
4594
4595                         if ((hw->mac.type != e1000_82574) &&
4596                             (hw->mac.type != e1000_82583))
4597                                 adapter->stats.tncrs += er32(TNCRS);
4598                 }
4599                 adapter->stats.colc += hw->mac.collision_delta;
4600         }
4601
4602         adapter->stats.xonrxc += er32(XONRXC);
4603         adapter->stats.xontxc += er32(XONTXC);
4604         adapter->stats.xoffrxc += er32(XOFFRXC);
4605         adapter->stats.xofftxc += er32(XOFFTXC);
4606         adapter->stats.gptc += er32(GPTC);
4607         adapter->stats.gotc += er32(GOTCL);
4608         er32(GOTCH); /* Clear gotc */
4609         adapter->stats.rnbc += er32(RNBC);
4610         adapter->stats.ruc += er32(RUC);
4611
4612         adapter->stats.mptc += er32(MPTC);
4613         adapter->stats.bptc += er32(BPTC);
4614
4615         /* used for adaptive IFS */
4616
4617         hw->mac.tx_packet_delta = er32(TPT);
4618         adapter->stats.tpt += hw->mac.tx_packet_delta;
4619
4620         adapter->stats.algnerrc += er32(ALGNERRC);
4621         adapter->stats.rxerrc += er32(RXERRC);
4622         adapter->stats.cexterr += er32(CEXTERR);
4623         adapter->stats.tsctc += er32(TSCTC);
4624         adapter->stats.tsctfc += er32(TSCTFC);
4625
4626         /* Fill out the OS statistics structure */
4627         netdev->stats.multicast = adapter->stats.mprc;
4628         netdev->stats.collisions = adapter->stats.colc;
4629
4630         /* Rx Errors */
4631
4632         /* RLEC on some newer hardware can be incorrect so build
4633          * our own version based on RUC and ROC
4634          */
4635         netdev->stats.rx_errors = adapter->stats.rxerrc +
4636                 adapter->stats.crcerrs + adapter->stats.algnerrc +
4637                 adapter->stats.ruc + adapter->stats.roc +
4638                 adapter->stats.cexterr;
4639         netdev->stats.rx_length_errors = adapter->stats.ruc +
4640                                               adapter->stats.roc;
4641         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4642         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4643         netdev->stats.rx_missed_errors = adapter->stats.mpc;
4644
4645         /* Tx Errors */
4646         netdev->stats.tx_errors = adapter->stats.ecol +
4647                                        adapter->stats.latecol;
4648         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4649         netdev->stats.tx_window_errors = adapter->stats.latecol;
4650         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4651
4652         /* Tx Dropped needs to be maintained elsewhere */
4653
4654         /* Management Stats */
4655         adapter->stats.mgptc += er32(MGTPTC);
4656         adapter->stats.mgprc += er32(MGTPRC);
4657         adapter->stats.mgpdc += er32(MGTPDC);
4658
4659         /* Correctable ECC Errors */
4660         if (hw->mac.type == e1000_pch_lpt) {
4661                 u32 pbeccsts = er32(PBECCSTS);
4662                 adapter->corr_errors +=
4663                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
4664                 adapter->uncorr_errors +=
4665                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
4666                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
4667         }
4668 }
4669
4670 /**
4671  * e1000_phy_read_status - Update the PHY register status snapshot
4672  * @adapter: board private structure
4673  **/
4674 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4675 {
4676         struct e1000_hw *hw = &adapter->hw;
4677         struct e1000_phy_regs *phy = &adapter->phy_regs;
4678
4679         if ((er32(STATUS) & E1000_STATUS_LU) &&
4680             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4681                 int ret_val;
4682
4683                 ret_val  = e1e_rphy(hw, PHY_CONTROL, &phy->bmcr);
4684                 ret_val |= e1e_rphy(hw, PHY_STATUS, &phy->bmsr);
4685                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_ADV, &phy->advertise);
4686                 ret_val |= e1e_rphy(hw, PHY_LP_ABILITY, &phy->lpa);
4687                 ret_val |= e1e_rphy(hw, PHY_AUTONEG_EXP, &phy->expansion);
4688                 ret_val |= e1e_rphy(hw, PHY_1000T_CTRL, &phy->ctrl1000);
4689                 ret_val |= e1e_rphy(hw, PHY_1000T_STATUS, &phy->stat1000);
4690                 ret_val |= e1e_rphy(hw, PHY_EXT_STATUS, &phy->estatus);
4691                 if (ret_val)
4692                         e_warn("Error reading PHY register\n");
4693         } else {
4694                 /* Do not read PHY registers if link is not up
4695                  * Set values to typical power-on defaults
4696                  */
4697                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4698                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4699                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4700                              BMSR_ERCAP);
4701                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4702                                   ADVERTISE_ALL | ADVERTISE_CSMA);
4703                 phy->lpa = 0;
4704                 phy->expansion = EXPANSION_ENABLENPAGE;
4705                 phy->ctrl1000 = ADVERTISE_1000FULL;
4706                 phy->stat1000 = 0;
4707                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4708         }
4709 }
4710
4711 static void e1000_print_link_info(struct e1000_adapter *adapter)
4712 {
4713         struct e1000_hw *hw = &adapter->hw;
4714         u32 ctrl = er32(CTRL);
4715
4716         /* Link status message must follow this format for user tools */
4717         pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4718                 adapter->netdev->name, adapter->link_speed,
4719                 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4720                 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4721                 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4722                 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4723 }
4724
4725 static bool e1000e_has_link(struct e1000_adapter *adapter)
4726 {
4727         struct e1000_hw *hw = &adapter->hw;
4728         bool link_active = false;
4729         s32 ret_val = 0;
4730
4731         /* get_link_status is set on LSC (link status) interrupt or
4732          * Rx sequence error interrupt.  get_link_status will stay
4733          * false until the check_for_link establishes link
4734          * for copper adapters ONLY
4735          */
4736         switch (hw->phy.media_type) {
4737         case e1000_media_type_copper:
4738                 if (hw->mac.get_link_status) {
4739                         ret_val = hw->mac.ops.check_for_link(hw);
4740                         link_active = !hw->mac.get_link_status;
4741                 } else {
4742                         link_active = true;
4743                 }
4744                 break;
4745         case e1000_media_type_fiber:
4746                 ret_val = hw->mac.ops.check_for_link(hw);
4747                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4748                 break;
4749         case e1000_media_type_internal_serdes:
4750                 ret_val = hw->mac.ops.check_for_link(hw);
4751                 link_active = adapter->hw.mac.serdes_has_link;
4752                 break;
4753         default:
4754         case e1000_media_type_unknown:
4755                 break;
4756         }
4757
4758         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4759             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4760                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4761                 e_info("Gigabit has been disabled, downgrading speed\n");
4762         }
4763
4764         return link_active;
4765 }
4766
4767 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4768 {
4769         /* make sure the receive unit is started */
4770         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4771             (adapter->flags & FLAG_RESTART_NOW)) {
4772                 struct e1000_hw *hw = &adapter->hw;
4773                 u32 rctl = er32(RCTL);
4774                 ew32(RCTL, rctl | E1000_RCTL_EN);
4775                 adapter->flags &= ~FLAG_RESTART_NOW;
4776         }
4777 }
4778
4779 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4780 {
4781         struct e1000_hw *hw = &adapter->hw;
4782
4783         /* With 82574 controllers, PHY needs to be checked periodically
4784          * for hung state and reset, if two calls return true
4785          */
4786         if (e1000_check_phy_82574(hw))
4787                 adapter->phy_hang_count++;
4788         else
4789                 adapter->phy_hang_count = 0;
4790
4791         if (adapter->phy_hang_count > 1) {
4792                 adapter->phy_hang_count = 0;
4793                 schedule_work(&adapter->reset_task);
4794         }
4795 }
4796
4797 /**
4798  * e1000_watchdog - Timer Call-back
4799  * @data: pointer to adapter cast into an unsigned long
4800  **/
4801 static void e1000_watchdog(unsigned long data)
4802 {
4803         struct e1000_adapter *adapter = (struct e1000_adapter *) data;
4804
4805         /* Do the rest outside of interrupt context */
4806         schedule_work(&adapter->watchdog_task);
4807
4808         /* TODO: make this use queue_delayed_work() */
4809 }
4810
4811 static void e1000_watchdog_task(struct work_struct *work)
4812 {
4813         struct e1000_adapter *adapter = container_of(work,
4814                                         struct e1000_adapter, watchdog_task);
4815         struct net_device *netdev = adapter->netdev;
4816         struct e1000_mac_info *mac = &adapter->hw.mac;
4817         struct e1000_phy_info *phy = &adapter->hw.phy;
4818         struct e1000_ring *tx_ring = adapter->tx_ring;
4819         struct e1000_hw *hw = &adapter->hw;
4820         u32 link, tctl;
4821
4822         if (test_bit(__E1000_DOWN, &adapter->state))
4823                 return;
4824
4825         link = e1000e_has_link(adapter);
4826         if ((netif_carrier_ok(netdev)) && link) {
4827                 /* Cancel scheduled suspend requests. */
4828                 pm_runtime_resume(netdev->dev.parent);
4829
4830                 e1000e_enable_receives(adapter);
4831                 goto link_up;
4832         }
4833
4834         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4835             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4836                 e1000_update_mng_vlan(adapter);
4837
4838         if (link) {
4839                 if (!netif_carrier_ok(netdev)) {
4840                         bool txb2b = true;
4841
4842                         /* Cancel scheduled suspend requests. */
4843                         pm_runtime_resume(netdev->dev.parent);
4844
4845                         /* update snapshot of PHY registers on LSC */
4846                         e1000_phy_read_status(adapter);
4847                         mac->ops.get_link_up_info(&adapter->hw,
4848                                                    &adapter->link_speed,
4849                                                    &adapter->link_duplex);
4850                         e1000_print_link_info(adapter);
4851                         /* On supported PHYs, check for duplex mismatch only
4852                          * if link has autonegotiated at 10/100 half
4853                          */
4854                         if ((hw->phy.type == e1000_phy_igp_3 ||
4855                              hw->phy.type == e1000_phy_bm) &&
4856                             (hw->mac.autoneg == true) &&
4857                             (adapter->link_speed == SPEED_10 ||
4858                              adapter->link_speed == SPEED_100) &&
4859                             (adapter->link_duplex == HALF_DUPLEX)) {
4860                                 u16 autoneg_exp;
4861
4862                                 e1e_rphy(hw, PHY_AUTONEG_EXP, &autoneg_exp);
4863
4864                                 if (!(autoneg_exp & NWAY_ER_LP_NWAY_CAPS))
4865                                         e_info("Autonegotiated half duplex but link partner cannot autoneg.  Try forcing full duplex if link gets many collisions.\n");
4866                         }
4867
4868                         /* adjust timeout factor according to speed/duplex */
4869                         adapter->tx_timeout_factor = 1;
4870                         switch (adapter->link_speed) {
4871                         case SPEED_10:
4872                                 txb2b = false;
4873                                 adapter->tx_timeout_factor = 16;
4874                                 break;
4875                         case SPEED_100:
4876                                 txb2b = false;
4877                                 adapter->tx_timeout_factor = 10;
4878                                 break;
4879                         }
4880
4881                         /* workaround: re-program speed mode bit after
4882                          * link-up event
4883                          */
4884                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4885                             !txb2b) {
4886                                 u32 tarc0;
4887                                 tarc0 = er32(TARC(0));
4888                                 tarc0 &= ~SPEED_MODE_BIT;
4889                                 ew32(TARC(0), tarc0);
4890                         }
4891
4892                         /* disable TSO for pcie and 10/100 speeds, to avoid
4893                          * some hardware issues
4894                          */
4895                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4896                                 switch (adapter->link_speed) {
4897                                 case SPEED_10:
4898                                 case SPEED_100:
4899                                         e_info("10/100 speed: disabling TSO\n");
4900                                         netdev->features &= ~NETIF_F_TSO;
4901                                         netdev->features &= ~NETIF_F_TSO6;
4902                                         break;
4903                                 case SPEED_1000:
4904                                         netdev->features |= NETIF_F_TSO;
4905                                         netdev->features |= NETIF_F_TSO6;
4906                                         break;
4907                                 default:
4908                                         /* oops */
4909                                         break;
4910                                 }
4911                         }
4912
4913                         /* enable transmits in the hardware, need to do this
4914                          * after setting TARC(0)
4915                          */
4916                         tctl = er32(TCTL);
4917                         tctl |= E1000_TCTL_EN;
4918                         ew32(TCTL, tctl);
4919
4920                         /* Perform any post-link-up configuration before
4921                          * reporting link up.
4922                          */
4923                         if (phy->ops.cfg_on_link_up)
4924                                 phy->ops.cfg_on_link_up(hw);
4925
4926                         netif_carrier_on(netdev);
4927
4928                         if (!test_bit(__E1000_DOWN, &adapter->state))
4929                                 mod_timer(&adapter->phy_info_timer,
4930                                           round_jiffies(jiffies + 2 * HZ));
4931                 }
4932         } else {
4933                 if (netif_carrier_ok(netdev)) {
4934                         adapter->link_speed = 0;
4935                         adapter->link_duplex = 0;
4936                         /* Link status message must follow this format */
4937                         pr_info("%s NIC Link is Down\n", adapter->netdev->name);
4938                         netif_carrier_off(netdev);
4939                         if (!test_bit(__E1000_DOWN, &adapter->state))
4940                                 mod_timer(&adapter->phy_info_timer,
4941                                           round_jiffies(jiffies + 2 * HZ));
4942
4943                         /* The link is lost so the controller stops DMA.
4944                          * If there is queued Tx work that cannot be done
4945                          * or if on an 8000ES2LAN which requires a Rx packet
4946                          * buffer work-around on link down event, reset the
4947                          * controller to flush the Tx/Rx packet buffers.
4948                          * (Do the reset outside of interrupt context).
4949                          */
4950                         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) ||
4951                             (e1000_desc_unused(tx_ring) + 1 < tx_ring->count))
4952                                 adapter->flags |= FLAG_RESTART_NOW;
4953                         else
4954                                 pm_schedule_suspend(netdev->dev.parent,
4955                                                         LINK_TIMEOUT);
4956                 }
4957         }
4958
4959 link_up:
4960         spin_lock(&adapter->stats64_lock);
4961         e1000e_update_stats(adapter);
4962
4963         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4964         adapter->tpt_old = adapter->stats.tpt;
4965         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4966         adapter->colc_old = adapter->stats.colc;
4967
4968         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4969         adapter->gorc_old = adapter->stats.gorc;
4970         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4971         adapter->gotc_old = adapter->stats.gotc;
4972         spin_unlock(&adapter->stats64_lock);
4973
4974         if (adapter->flags & FLAG_RESTART_NOW) {
4975                 schedule_work(&adapter->reset_task);
4976                 /* return immediately since reset is imminent */
4977                 return;
4978         }
4979
4980         e1000e_update_adaptive(&adapter->hw);
4981
4982         /* Simple mode for Interrupt Throttle Rate (ITR) */
4983         if (adapter->itr_setting == 4) {
4984                 /* Symmetric Tx/Rx gets a reduced ITR=2000;
4985                  * Total asymmetrical Tx or Rx gets ITR=8000;
4986                  * everyone else is between 2000-8000.
4987                  */
4988                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
4989                 u32 dif = (adapter->gotc > adapter->gorc ?
4990                             adapter->gotc - adapter->gorc :
4991                             adapter->gorc - adapter->gotc) / 10000;
4992                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
4993
4994                 e1000e_write_itr(adapter, itr);
4995         }
4996
4997         /* Cause software interrupt to ensure Rx ring is cleaned */
4998         if (adapter->msix_entries)
4999                 ew32(ICS, adapter->rx_ring->ims_val);
5000         else
5001                 ew32(ICS, E1000_ICS_RXDMT0);
5002
5003         /* flush pending descriptors to memory before detecting Tx hang */
5004         e1000e_flush_descriptors(adapter);
5005
5006         /* Force detection of hung controller every watchdog period */
5007         adapter->detect_tx_hung = true;
5008
5009         /* With 82571 controllers, LAA may be overwritten due to controller
5010          * reset from the other port. Set the appropriate LAA in RAR[0]
5011          */
5012         if (e1000e_get_laa_state_82571(hw))
5013                 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
5014
5015         if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
5016                 e1000e_check_82574_phy_workaround(adapter);
5017
5018         /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */
5019         if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) {
5020                 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) &&
5021                     (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) {
5022                         er32(RXSTMPH);
5023                         adapter->rx_hwtstamp_cleared++;
5024                 } else {
5025                         adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP;
5026                 }
5027         }
5028
5029         /* Reset the timer */
5030         if (!test_bit(__E1000_DOWN, &adapter->state))
5031                 mod_timer(&adapter->watchdog_timer,
5032                           round_jiffies(jiffies + 2 * HZ));
5033 }
5034
5035 #define E1000_TX_FLAGS_CSUM             0x00000001
5036 #define E1000_TX_FLAGS_VLAN             0x00000002
5037 #define E1000_TX_FLAGS_TSO              0x00000004
5038 #define E1000_TX_FLAGS_IPV4             0x00000008
5039 #define E1000_TX_FLAGS_NO_FCS           0x00000010
5040 #define E1000_TX_FLAGS_HWTSTAMP         0x00000020
5041 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
5042 #define E1000_TX_FLAGS_VLAN_SHIFT       16
5043
5044 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
5045 {
5046         struct e1000_context_desc *context_desc;
5047         struct e1000_buffer *buffer_info;
5048         unsigned int i;
5049         u32 cmd_length = 0;
5050         u16 ipcse = 0, mss;
5051         u8 ipcss, ipcso, tucss, tucso, hdr_len;
5052
5053         if (!skb_is_gso(skb))
5054                 return 0;
5055
5056         if (skb_header_cloned(skb)) {
5057                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5058
5059                 if (err)
5060                         return err;
5061         }
5062
5063         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5064         mss = skb_shinfo(skb)->gso_size;
5065         if (skb->protocol == htons(ETH_P_IP)) {
5066                 struct iphdr *iph = ip_hdr(skb);
5067                 iph->tot_len = 0;
5068                 iph->check = 0;
5069                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
5070                                                          0, IPPROTO_TCP, 0);
5071                 cmd_length = E1000_TXD_CMD_IP;
5072                 ipcse = skb_transport_offset(skb) - 1;
5073         } else if (skb_is_gso_v6(skb)) {
5074                 ipv6_hdr(skb)->payload_len = 0;
5075                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5076                                                        &ipv6_hdr(skb)->daddr,
5077                                                        0, IPPROTO_TCP, 0);
5078                 ipcse = 0;
5079         }
5080         ipcss = skb_network_offset(skb);
5081         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
5082         tucss = skb_transport_offset(skb);
5083         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
5084
5085         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
5086                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
5087
5088         i = tx_ring->next_to_use;
5089         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5090         buffer_info = &tx_ring->buffer_info[i];
5091
5092         context_desc->lower_setup.ip_fields.ipcss  = ipcss;
5093         context_desc->lower_setup.ip_fields.ipcso  = ipcso;
5094         context_desc->lower_setup.ip_fields.ipcse  = cpu_to_le16(ipcse);
5095         context_desc->upper_setup.tcp_fields.tucss = tucss;
5096         context_desc->upper_setup.tcp_fields.tucso = tucso;
5097         context_desc->upper_setup.tcp_fields.tucse = 0;
5098         context_desc->tcp_seg_setup.fields.mss     = cpu_to_le16(mss);
5099         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
5100         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
5101
5102         buffer_info->time_stamp = jiffies;
5103         buffer_info->next_to_watch = i;
5104
5105         i++;
5106         if (i == tx_ring->count)
5107                 i = 0;
5108         tx_ring->next_to_use = i;
5109
5110         return 1;
5111 }
5112
5113 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
5114 {
5115         struct e1000_adapter *adapter = tx_ring->adapter;
5116         struct e1000_context_desc *context_desc;
5117         struct e1000_buffer *buffer_info;
5118         unsigned int i;
5119         u8 css;
5120         u32 cmd_len = E1000_TXD_CMD_DEXT;
5121         __be16 protocol;
5122
5123         if (skb->ip_summed != CHECKSUM_PARTIAL)
5124                 return 0;
5125
5126         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
5127                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
5128         else
5129                 protocol = skb->protocol;
5130
5131         switch (protocol) {
5132         case cpu_to_be16(ETH_P_IP):
5133                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5134                         cmd_len |= E1000_TXD_CMD_TCP;
5135                 break;
5136         case cpu_to_be16(ETH_P_IPV6):
5137                 /* XXX not handling all IPV6 headers */
5138                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5139                         cmd_len |= E1000_TXD_CMD_TCP;
5140                 break;
5141         default:
5142                 if (unlikely(net_ratelimit()))
5143                         e_warn("checksum_partial proto=%x!\n",
5144                                be16_to_cpu(protocol));
5145                 break;
5146         }
5147
5148         css = skb_checksum_start_offset(skb);
5149
5150         i = tx_ring->next_to_use;
5151         buffer_info = &tx_ring->buffer_info[i];
5152         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5153
5154         context_desc->lower_setup.ip_config = 0;
5155         context_desc->upper_setup.tcp_fields.tucss = css;
5156         context_desc->upper_setup.tcp_fields.tucso =
5157                                 css + skb->csum_offset;
5158         context_desc->upper_setup.tcp_fields.tucse = 0;
5159         context_desc->tcp_seg_setup.data = 0;
5160         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
5161
5162         buffer_info->time_stamp = jiffies;
5163         buffer_info->next_to_watch = i;
5164
5165         i++;
5166         if (i == tx_ring->count)
5167                 i = 0;
5168         tx_ring->next_to_use = i;
5169
5170         return 1;
5171 }
5172
5173 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
5174                         unsigned int first, unsigned int max_per_txd,
5175                         unsigned int nr_frags)
5176 {
5177         struct e1000_adapter *adapter = tx_ring->adapter;
5178         struct pci_dev *pdev = adapter->pdev;
5179         struct e1000_buffer *buffer_info;
5180         unsigned int len = skb_headlen(skb);
5181         unsigned int offset = 0, size, count = 0, i;
5182         unsigned int f, bytecount, segs;
5183
5184         i = tx_ring->next_to_use;
5185
5186         while (len) {
5187                 buffer_info = &tx_ring->buffer_info[i];
5188                 size = min(len, max_per_txd);
5189
5190                 buffer_info->length = size;
5191                 buffer_info->time_stamp = jiffies;
5192                 buffer_info->next_to_watch = i;
5193                 buffer_info->dma = dma_map_single(&pdev->dev,
5194                                                   skb->data + offset,
5195                                                   size, DMA_TO_DEVICE);
5196                 buffer_info->mapped_as_page = false;
5197                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5198                         goto dma_error;
5199
5200                 len -= size;
5201                 offset += size;
5202                 count++;
5203
5204                 if (len) {
5205                         i++;
5206                         if (i == tx_ring->count)
5207                                 i = 0;
5208                 }
5209         }
5210
5211         for (f = 0; f < nr_frags; f++) {
5212                 const struct skb_frag_struct *frag;
5213
5214                 frag = &skb_shinfo(skb)->frags[f];
5215                 len = skb_frag_size(frag);
5216                 offset = 0;
5217
5218                 while (len) {
5219                         i++;
5220                         if (i == tx_ring->count)
5221                                 i = 0;
5222
5223                         buffer_info = &tx_ring->buffer_info[i];
5224                         size = min(len, max_per_txd);
5225
5226                         buffer_info->length = size;
5227                         buffer_info->time_stamp = jiffies;
5228                         buffer_info->next_to_watch = i;
5229                         buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
5230                                                 offset, size, DMA_TO_DEVICE);
5231                         buffer_info->mapped_as_page = true;
5232                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5233                                 goto dma_error;
5234
5235                         len -= size;
5236                         offset += size;
5237                         count++;
5238                 }
5239         }
5240
5241         segs = skb_shinfo(skb)->gso_segs ? : 1;
5242         /* multiply data chunks by size of headers */
5243         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
5244
5245         tx_ring->buffer_info[i].skb = skb;
5246         tx_ring->buffer_info[i].segs = segs;
5247         tx_ring->buffer_info[i].bytecount = bytecount;
5248         tx_ring->buffer_info[first].next_to_watch = i;
5249
5250         return count;
5251
5252 dma_error:
5253         dev_err(&pdev->dev, "Tx DMA map failed\n");
5254         buffer_info->dma = 0;
5255         if (count)
5256                 count--;
5257
5258         while (count--) {
5259                 if (i == 0)
5260                         i += tx_ring->count;
5261                 i--;
5262                 buffer_info = &tx_ring->buffer_info[i];
5263                 e1000_put_txbuf(tx_ring, buffer_info);
5264         }
5265
5266         return 0;
5267 }
5268
5269 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
5270 {
5271         struct e1000_adapter *adapter = tx_ring->adapter;
5272         struct e1000_tx_desc *tx_desc = NULL;
5273         struct e1000_buffer *buffer_info;
5274         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
5275         unsigned int i;
5276
5277         if (tx_flags & E1000_TX_FLAGS_TSO) {
5278                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
5279                              E1000_TXD_CMD_TSE;
5280                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5281
5282                 if (tx_flags & E1000_TX_FLAGS_IPV4)
5283                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
5284         }
5285
5286         if (tx_flags & E1000_TX_FLAGS_CSUM) {
5287                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5288                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5289         }
5290
5291         if (tx_flags & E1000_TX_FLAGS_VLAN) {
5292                 txd_lower |= E1000_TXD_CMD_VLE;
5293                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
5294         }
5295
5296         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5297                 txd_lower &= ~(E1000_TXD_CMD_IFCS);
5298
5299         if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) {
5300                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5301                 txd_upper |= E1000_TXD_EXTCMD_TSTAMP;
5302         }
5303
5304         i = tx_ring->next_to_use;
5305
5306         do {
5307                 buffer_info = &tx_ring->buffer_info[i];
5308                 tx_desc = E1000_TX_DESC(*tx_ring, i);
5309                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
5310                 tx_desc->lower.data =
5311                         cpu_to_le32(txd_lower | buffer_info->length);
5312                 tx_desc->upper.data = cpu_to_le32(txd_upper);
5313
5314                 i++;
5315                 if (i == tx_ring->count)
5316                         i = 0;
5317         } while (--count > 0);
5318
5319         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
5320
5321         /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
5322         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5323                 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
5324
5325         /* Force memory writes to complete before letting h/w
5326          * know there are new descriptors to fetch.  (Only
5327          * applicable for weak-ordered memory model archs,
5328          * such as IA-64).
5329          */
5330         wmb();
5331
5332         tx_ring->next_to_use = i;
5333
5334         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
5335                 e1000e_update_tdt_wa(tx_ring, i);
5336         else
5337                 writel(i, tx_ring->tail);
5338
5339         /* we need this if more than one processor can write to our tail
5340          * at a time, it synchronizes IO on IA64/Altix systems
5341          */
5342         mmiowb();
5343 }
5344
5345 #define MINIMUM_DHCP_PACKET_SIZE 282
5346 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
5347                                     struct sk_buff *skb)
5348 {
5349         struct e1000_hw *hw =  &adapter->hw;
5350         u16 length, offset;
5351
5352         if (vlan_tx_tag_present(skb) &&
5353             !((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
5354               (adapter->hw.mng_cookie.status &
5355                E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
5356                 return 0;
5357
5358         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
5359                 return 0;
5360
5361         if (((struct ethhdr *) skb->data)->h_proto != htons(ETH_P_IP))
5362                 return 0;
5363
5364         {
5365                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data+14);
5366                 struct udphdr *udp;
5367
5368                 if (ip->protocol != IPPROTO_UDP)
5369                         return 0;
5370
5371                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
5372                 if (ntohs(udp->dest) != 67)
5373                         return 0;
5374
5375                 offset = (u8 *)udp + 8 - skb->data;
5376                 length = skb->len - offset;
5377                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
5378         }
5379
5380         return 0;
5381 }
5382
5383 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5384 {
5385         struct e1000_adapter *adapter = tx_ring->adapter;
5386
5387         netif_stop_queue(adapter->netdev);
5388         /* Herbert's original patch had:
5389          *  smp_mb__after_netif_stop_queue();
5390          * but since that doesn't exist yet, just open code it.
5391          */
5392         smp_mb();
5393
5394         /* We need to check again in a case another CPU has just
5395          * made room available.
5396          */
5397         if (e1000_desc_unused(tx_ring) < size)
5398                 return -EBUSY;
5399
5400         /* A reprieve! */
5401         netif_start_queue(adapter->netdev);
5402         ++adapter->restart_queue;
5403         return 0;
5404 }
5405
5406 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5407 {
5408         BUG_ON(size > tx_ring->count);
5409
5410         if (e1000_desc_unused(tx_ring) >= size)
5411                 return 0;
5412         return __e1000_maybe_stop_tx(tx_ring, size);
5413 }
5414
5415 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5416                                     struct net_device *netdev)
5417 {
5418         struct e1000_adapter *adapter = netdev_priv(netdev);
5419         struct e1000_ring *tx_ring = adapter->tx_ring;
5420         unsigned int first;
5421         unsigned int tx_flags = 0;
5422         unsigned int len = skb_headlen(skb);
5423         unsigned int nr_frags;
5424         unsigned int mss;
5425         int count = 0;
5426         int tso;
5427         unsigned int f;
5428
5429         if (test_bit(__E1000_DOWN, &adapter->state)) {
5430                 dev_kfree_skb_any(skb);
5431                 return NETDEV_TX_OK;
5432         }
5433
5434         if (skb->len <= 0) {
5435                 dev_kfree_skb_any(skb);
5436                 return NETDEV_TX_OK;
5437         }
5438
5439         /* The minimum packet size with TCTL.PSP set is 17 bytes so
5440          * pad skb in order to meet this minimum size requirement
5441          */
5442         if (unlikely(skb->len < 17)) {
5443                 if (skb_pad(skb, 17 - skb->len))
5444                         return NETDEV_TX_OK;
5445                 skb->len = 17;
5446                 skb_set_tail_pointer(skb, 17);
5447         }
5448
5449         mss = skb_shinfo(skb)->gso_size;
5450         if (mss) {
5451                 u8 hdr_len;
5452
5453                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
5454                  * points to just header, pull a few bytes of payload from
5455                  * frags into skb->data
5456                  */
5457                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5458                 /* we do this workaround for ES2LAN, but it is un-necessary,
5459                  * avoiding it could save a lot of cycles
5460                  */
5461                 if (skb->data_len && (hdr_len == len)) {
5462                         unsigned int pull_size;
5463
5464                         pull_size = min_t(unsigned int, 4, skb->data_len);
5465                         if (!__pskb_pull_tail(skb, pull_size)) {
5466                                 e_err("__pskb_pull_tail failed.\n");
5467                                 dev_kfree_skb_any(skb);
5468                                 return NETDEV_TX_OK;
5469                         }
5470                         len = skb_headlen(skb);
5471                 }
5472         }
5473
5474         /* reserve a descriptor for the offload context */
5475         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5476                 count++;
5477         count++;
5478
5479         count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
5480
5481         nr_frags = skb_shinfo(skb)->nr_frags;
5482         for (f = 0; f < nr_frags; f++)
5483                 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5484                                       adapter->tx_fifo_limit);
5485
5486         if (adapter->hw.mac.tx_pkt_filtering)
5487                 e1000_transfer_dhcp_info(adapter, skb);
5488
5489         /* need: count + 2 desc gap to keep tail from touching
5490          * head, otherwise try next time
5491          */
5492         if (e1000_maybe_stop_tx(tx_ring, count + 2))
5493                 return NETDEV_TX_BUSY;
5494
5495         if (vlan_tx_tag_present(skb)) {
5496                 tx_flags |= E1000_TX_FLAGS_VLAN;
5497                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5498         }
5499
5500         first = tx_ring->next_to_use;
5501
5502         tso = e1000_tso(tx_ring, skb);
5503         if (tso < 0) {
5504                 dev_kfree_skb_any(skb);
5505                 return NETDEV_TX_OK;
5506         }
5507
5508         if (tso)
5509                 tx_flags |= E1000_TX_FLAGS_TSO;
5510         else if (e1000_tx_csum(tx_ring, skb))
5511                 tx_flags |= E1000_TX_FLAGS_CSUM;
5512
5513         /* Old method was to assume IPv4 packet by default if TSO was enabled.
5514          * 82571 hardware supports TSO capabilities for IPv6 as well...
5515          * no longer assume, we must.
5516          */
5517         if (skb->protocol == htons(ETH_P_IP))
5518                 tx_flags |= E1000_TX_FLAGS_IPV4;
5519
5520         if (unlikely(skb->no_fcs))
5521                 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5522
5523         /* if count is 0 then mapping error has occurred */
5524         count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
5525                              nr_frags);
5526         if (count) {
5527                 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
5528                              !adapter->tx_hwtstamp_skb)) {
5529                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
5530                         tx_flags |= E1000_TX_FLAGS_HWTSTAMP;
5531                         adapter->tx_hwtstamp_skb = skb_get(skb);
5532                         schedule_work(&adapter->tx_hwtstamp_work);
5533                 } else {
5534                         skb_tx_timestamp(skb);
5535                 }
5536
5537                 netdev_sent_queue(netdev, skb->len);
5538                 e1000_tx_queue(tx_ring, tx_flags, count);
5539                 /* Make sure there is space in the ring for the next send. */
5540                 e1000_maybe_stop_tx(tx_ring,
5541                                     (MAX_SKB_FRAGS *
5542                                      DIV_ROUND_UP(PAGE_SIZE,
5543                                                   adapter->tx_fifo_limit) + 2));
5544         } else {
5545                 dev_kfree_skb_any(skb);
5546                 tx_ring->buffer_info[first].time_stamp = 0;
5547                 tx_ring->next_to_use = first;
5548         }
5549
5550         return NETDEV_TX_OK;
5551 }
5552
5553 /**
5554  * e1000_tx_timeout - Respond to a Tx Hang
5555  * @netdev: network interface device structure
5556  **/
5557 static void e1000_tx_timeout(struct net_device *netdev)
5558 {
5559         struct e1000_adapter *adapter = netdev_priv(netdev);
5560
5561         /* Do the reset outside of interrupt context */
5562         adapter->tx_timeout_count++;
5563         schedule_work(&adapter->reset_task);
5564 }
5565
5566 static void e1000_reset_task(struct work_struct *work)
5567 {
5568         struct e1000_adapter *adapter;
5569         adapter = container_of(work, struct e1000_adapter, reset_task);
5570
5571         /* don't run the task if already down */
5572         if (test_bit(__E1000_DOWN, &adapter->state))
5573                 return;
5574
5575         if (!(adapter->flags & FLAG_RESTART_NOW)) {
5576                 e1000e_dump(adapter);
5577                 e_err("Reset adapter unexpectedly\n");
5578         }
5579         e1000e_reinit_locked(adapter);
5580 }
5581
5582 /**
5583  * e1000_get_stats64 - Get System Network Statistics
5584  * @netdev: network interface device structure
5585  * @stats: rtnl_link_stats64 pointer
5586  *
5587  * Returns the address of the device statistics structure.
5588  **/
5589 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5590                                              struct rtnl_link_stats64 *stats)
5591 {
5592         struct e1000_adapter *adapter = netdev_priv(netdev);
5593
5594         memset(stats, 0, sizeof(struct rtnl_link_stats64));
5595         spin_lock(&adapter->stats64_lock);
5596         e1000e_update_stats(adapter);
5597         /* Fill out the OS statistics structure */
5598         stats->rx_bytes = adapter->stats.gorc;
5599         stats->rx_packets = adapter->stats.gprc;
5600         stats->tx_bytes = adapter->stats.gotc;
5601         stats->tx_packets = adapter->stats.gptc;
5602         stats->multicast = adapter->stats.mprc;
5603         stats->collisions = adapter->stats.colc;
5604
5605         /* Rx Errors */
5606
5607         /* RLEC on some newer hardware can be incorrect so build
5608          * our own version based on RUC and ROC
5609          */
5610         stats->rx_errors = adapter->stats.rxerrc +
5611                 adapter->stats.crcerrs + adapter->stats.algnerrc +
5612                 adapter->stats.ruc + adapter->stats.roc +
5613                 adapter->stats.cexterr;
5614         stats->rx_length_errors = adapter->stats.ruc +
5615                                               adapter->stats.roc;
5616         stats->rx_crc_errors = adapter->stats.crcerrs;
5617         stats->rx_frame_errors = adapter->stats.algnerrc;
5618         stats->rx_missed_errors = adapter->stats.mpc;
5619
5620         /* Tx Errors */
5621         stats->tx_errors = adapter->stats.ecol +
5622                                        adapter->stats.latecol;
5623         stats->tx_aborted_errors = adapter->stats.ecol;
5624         stats->tx_window_errors = adapter->stats.latecol;
5625         stats->tx_carrier_errors = adapter->stats.tncrs;
5626
5627         /* Tx Dropped needs to be maintained elsewhere */
5628
5629         spin_unlock(&adapter->stats64_lock);
5630         return stats;
5631 }
5632
5633 /**
5634  * e1000_change_mtu - Change the Maximum Transfer Unit
5635  * @netdev: network interface device structure
5636  * @new_mtu: new value for maximum frame size
5637  *
5638  * Returns 0 on success, negative on failure
5639  **/
5640 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5641 {
5642         struct e1000_adapter *adapter = netdev_priv(netdev);
5643         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5644
5645         /* Jumbo frame support */
5646         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5647             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5648                 e_err("Jumbo Frames not supported.\n");
5649                 return -EINVAL;
5650         }
5651
5652         /* Supported frame sizes */
5653         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5654             (max_frame > adapter->max_hw_frame_size)) {
5655                 e_err("Unsupported MTU setting\n");
5656                 return -EINVAL;
5657         }
5658
5659         /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5660         if ((adapter->hw.mac.type >= e1000_pch2lan) &&
5661             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5662             (new_mtu > ETH_DATA_LEN)) {
5663                 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
5664                 return -EINVAL;
5665         }
5666
5667         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5668                 usleep_range(1000, 2000);
5669         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5670         adapter->max_frame_size = max_frame;
5671         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5672         netdev->mtu = new_mtu;
5673         if (netif_running(netdev))
5674                 e1000e_down(adapter);
5675
5676         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5677          * means we reserve 2 more, this pushes us to allocate from the next
5678          * larger slab size.
5679          * i.e. RXBUFFER_2048 --> size-4096 slab
5680          * However with the new *_jumbo_rx* routines, jumbo receives will use
5681          * fragmented skbs
5682          */
5683
5684         if (max_frame <= 2048)
5685                 adapter->rx_buffer_len = 2048;
5686         else
5687                 adapter->rx_buffer_len = 4096;
5688
5689         /* adjust allocation if LPE protects us, and we aren't using SBP */
5690         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5691              (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5692                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5693                                          + ETH_FCS_LEN;
5694
5695         if (netif_running(netdev))
5696                 e1000e_up(adapter);
5697         else
5698                 e1000e_reset(adapter);
5699
5700         clear_bit(__E1000_RESETTING, &adapter->state);
5701
5702         return 0;
5703 }
5704
5705 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5706                            int cmd)
5707 {
5708         struct e1000_adapter *adapter = netdev_priv(netdev);
5709         struct mii_ioctl_data *data = if_mii(ifr);
5710
5711         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5712                 return -EOPNOTSUPP;
5713
5714         switch (cmd) {
5715         case SIOCGMIIPHY:
5716                 data->phy_id = adapter->hw.phy.addr;
5717                 break;
5718         case SIOCGMIIREG:
5719                 e1000_phy_read_status(adapter);
5720
5721                 switch (data->reg_num & 0x1F) {
5722                 case MII_BMCR:
5723                         data->val_out = adapter->phy_regs.bmcr;
5724                         break;
5725                 case MII_BMSR:
5726                         data->val_out = adapter->phy_regs.bmsr;
5727                         break;
5728                 case MII_PHYSID1:
5729                         data->val_out = (adapter->hw.phy.id >> 16);
5730                         break;
5731                 case MII_PHYSID2:
5732                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
5733                         break;
5734                 case MII_ADVERTISE:
5735                         data->val_out = adapter->phy_regs.advertise;
5736                         break;
5737                 case MII_LPA:
5738                         data->val_out = adapter->phy_regs.lpa;
5739                         break;
5740                 case MII_EXPANSION:
5741                         data->val_out = adapter->phy_regs.expansion;
5742                         break;
5743                 case MII_CTRL1000:
5744                         data->val_out = adapter->phy_regs.ctrl1000;
5745                         break;
5746                 case MII_STAT1000:
5747                         data->val_out = adapter->phy_regs.stat1000;
5748                         break;
5749                 case MII_ESTATUS:
5750                         data->val_out = adapter->phy_regs.estatus;
5751                         break;
5752                 default:
5753                         return -EIO;
5754                 }
5755                 break;
5756         case SIOCSMIIREG:
5757         default:
5758                 return -EOPNOTSUPP;
5759         }
5760         return 0;
5761 }
5762
5763 /**
5764  * e1000e_hwtstamp_ioctl - control hardware time stamping
5765  * @netdev: network interface device structure
5766  * @ifreq: interface request
5767  *
5768  * Outgoing time stamping can be enabled and disabled. Play nice and
5769  * disable it when requested, although it shouldn't cause any overhead
5770  * when no packet needs it. At most one packet in the queue may be
5771  * marked for time stamping, otherwise it would be impossible to tell
5772  * for sure to which packet the hardware time stamp belongs.
5773  *
5774  * Incoming time stamping has to be configured via the hardware filters.
5775  * Not all combinations are supported, in particular event type has to be
5776  * specified. Matching the kind of event packet is not supported, with the
5777  * exception of "all V2 events regardless of level 2 or 4".
5778  **/
5779 static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
5780 {
5781         struct e1000_adapter *adapter = netdev_priv(netdev);
5782         struct hwtstamp_config config;
5783         int ret_val;
5784
5785         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5786                 return -EFAULT;
5787
5788         adapter->hwtstamp_config = config;
5789
5790         ret_val = e1000e_config_hwtstamp(adapter);
5791         if (ret_val)
5792                 return ret_val;
5793
5794         config = adapter->hwtstamp_config;
5795
5796         switch (config.rx_filter) {
5797         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
5798         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
5799         case HWTSTAMP_FILTER_PTP_V2_SYNC:
5800         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
5801         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
5802         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
5803                 /* With V2 type filters which specify a Sync or Delay Request,
5804                  * Path Delay Request/Response messages are also time stamped
5805                  * by hardware so notify the caller the requested packets plus
5806                  * some others are time stamped.
5807                  */
5808                 config.rx_filter = HWTSTAMP_FILTER_SOME;
5809                 break;
5810         default:
5811                 break;
5812         }
5813
5814         return copy_to_user(ifr->ifr_data, &config,
5815                             sizeof(config)) ? -EFAULT : 0;
5816 }
5817
5818 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5819 {
5820         switch (cmd) {
5821         case SIOCGMIIPHY:
5822         case SIOCGMIIREG:
5823         case SIOCSMIIREG:
5824                 return e1000_mii_ioctl(netdev, ifr, cmd);
5825         case SIOCSHWTSTAMP:
5826                 return e1000e_hwtstamp_ioctl(netdev, ifr);
5827         default:
5828                 return -EOPNOTSUPP;
5829         }
5830 }
5831
5832 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5833 {
5834         struct e1000_hw *hw = &adapter->hw;
5835         u32 i, mac_reg;
5836         u16 phy_reg, wuc_enable;
5837         int retval = 0;
5838
5839         /* copy MAC RARs to PHY RARs */
5840         e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5841
5842         retval = hw->phy.ops.acquire(hw);
5843         if (retval) {
5844                 e_err("Could not acquire PHY\n");
5845                 return retval;
5846         }
5847
5848         /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5849         retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5850         if (retval)
5851                 goto release;
5852
5853         /* copy MAC MTA to PHY MTA - only needed for pchlan */
5854         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5855                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5856                 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5857                                            (u16)(mac_reg & 0xFFFF));
5858                 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5859                                            (u16)((mac_reg >> 16) & 0xFFFF));
5860         }
5861
5862         /* configure PHY Rx Control register */
5863         hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5864         mac_reg = er32(RCTL);
5865         if (mac_reg & E1000_RCTL_UPE)
5866                 phy_reg |= BM_RCTL_UPE;
5867         if (mac_reg & E1000_RCTL_MPE)
5868                 phy_reg |= BM_RCTL_MPE;
5869         phy_reg &= ~(BM_RCTL_MO_MASK);
5870         if (mac_reg & E1000_RCTL_MO_3)
5871                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5872                                 << BM_RCTL_MO_SHIFT);
5873         if (mac_reg & E1000_RCTL_BAM)
5874                 phy_reg |= BM_RCTL_BAM;
5875         if (mac_reg & E1000_RCTL_PMCF)
5876                 phy_reg |= BM_RCTL_PMCF;
5877         mac_reg = er32(CTRL);
5878         if (mac_reg & E1000_CTRL_RFCE)
5879                 phy_reg |= BM_RCTL_RFCE;
5880         hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5881
5882         /* enable PHY wakeup in MAC register */
5883         ew32(WUFC, wufc);
5884         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5885
5886         /* configure and enable PHY wakeup in PHY registers */
5887         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5888         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5889
5890         /* activate PHY wakeup */
5891         wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5892         retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5893         if (retval)
5894                 e_err("Could not set PHY Host Wakeup bit\n");
5895 release:
5896         hw->phy.ops.release(hw);
5897
5898         return retval;
5899 }
5900
5901 static int __e1000_shutdown(struct pci_dev *pdev, bool *enable_wake,
5902                             bool runtime)
5903 {
5904         struct net_device *netdev = pci_get_drvdata(pdev);
5905         struct e1000_adapter *adapter = netdev_priv(netdev);
5906         struct e1000_hw *hw = &adapter->hw;
5907         u32 ctrl, ctrl_ext, rctl, status;
5908         /* Runtime suspend should only enable wakeup for link changes */
5909         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5910         int retval = 0;
5911
5912         netif_device_detach(netdev);
5913
5914         if (netif_running(netdev)) {
5915                 int count = E1000_CHECK_RESET_COUNT;
5916
5917                 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
5918                         usleep_range(10000, 20000);
5919
5920                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5921                 e1000e_down(adapter);
5922                 e1000_free_irq(adapter);
5923         }
5924         e1000e_reset_interrupt_capability(adapter);
5925
5926         retval = pci_save_state(pdev);
5927         if (retval)
5928                 return retval;
5929
5930         status = er32(STATUS);
5931         if (status & E1000_STATUS_LU)
5932                 wufc &= ~E1000_WUFC_LNKC;
5933
5934         if (wufc) {
5935                 e1000_setup_rctl(adapter);
5936                 e1000e_set_rx_mode(netdev);
5937
5938                 /* turn on all-multi mode if wake on multicast is enabled */
5939                 if (wufc & E1000_WUFC_MC) {
5940                         rctl = er32(RCTL);
5941                         rctl |= E1000_RCTL_MPE;
5942                         ew32(RCTL, rctl);
5943                 }
5944
5945                 ctrl = er32(CTRL);
5946                 /* advertise wake from D3Cold */
5947                 #define E1000_CTRL_ADVD3WUC 0x00100000
5948                 /* phy power management enable */
5949                 #define E1000_CTRL_EN_PHY_PWR_MGMT 0x00200000
5950                 ctrl |= E1000_CTRL_ADVD3WUC;
5951                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5952                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5953                 ew32(CTRL, ctrl);
5954
5955                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5956                     adapter->hw.phy.media_type ==
5957                     e1000_media_type_internal_serdes) {
5958                         /* keep the laser running in D3 */
5959                         ctrl_ext = er32(CTRL_EXT);
5960                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5961                         ew32(CTRL_EXT, ctrl_ext);
5962                 }
5963
5964                 if (adapter->flags & FLAG_IS_ICH)
5965                         e1000_suspend_workarounds_ich8lan(&adapter->hw);
5966
5967                 /* Allow time for pending master requests to run */
5968                 e1000e_disable_pcie_master(&adapter->hw);
5969
5970                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5971                         /* enable wakeup by the PHY */
5972                         retval = e1000_init_phy_wakeup(adapter, wufc);
5973                         if (retval)
5974                                 return retval;
5975                 } else {
5976                         /* enable wakeup by the MAC */
5977                         ew32(WUFC, wufc);
5978                         ew32(WUC, E1000_WUC_PME_EN);
5979                 }
5980         } else {
5981                 ew32(WUC, 0);
5982                 ew32(WUFC, 0);
5983         }
5984
5985         *enable_wake = !!wufc;
5986
5987         /* make sure adapter isn't asleep if manageability is enabled */
5988         if ((adapter->flags & FLAG_MNG_PT_ENABLED) ||
5989             (hw->mac.ops.check_mng_mode(hw)))
5990                 *enable_wake = true;
5991
5992         if (adapter->hw.phy.type == e1000_phy_igp_3)
5993                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5994
5995         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5996          * would have already happened in close and is redundant.
5997          */
5998         e1000e_release_hw_control(adapter);
5999
6000         pci_disable_device(pdev);
6001
6002         return 0;
6003 }
6004
6005 static void e1000_power_off(struct pci_dev *pdev, bool sleep, bool wake)
6006 {
6007         if (sleep && wake) {
6008                 pci_prepare_to_sleep(pdev);
6009                 return;
6010         }
6011
6012         pci_wake_from_d3(pdev, wake);
6013         pci_set_power_state(pdev, PCI_D3hot);
6014 }
6015
6016 static void e1000_complete_shutdown(struct pci_dev *pdev, bool sleep,
6017                                     bool wake)
6018 {
6019         struct net_device *netdev = pci_get_drvdata(pdev);
6020         struct e1000_adapter *adapter = netdev_priv(netdev);
6021
6022         /* The pci-e switch on some quad port adapters will report a
6023          * correctable error when the MAC transitions from D0 to D3.  To
6024          * prevent this we need to mask off the correctable errors on the
6025          * downstream port of the pci-e switch.
6026          */
6027         if (adapter->flags & FLAG_IS_QUAD_PORT) {
6028                 struct pci_dev *us_dev = pdev->bus->self;
6029                 u16 devctl;
6030
6031                 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
6032                 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
6033                                            (devctl & ~PCI_EXP_DEVCTL_CERE));
6034
6035                 e1000_power_off(pdev, sleep, wake);
6036
6037                 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
6038         } else {
6039                 e1000_power_off(pdev, sleep, wake);
6040         }
6041 }
6042
6043 #ifdef CONFIG_PCIEASPM
6044 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6045 {
6046         pci_disable_link_state_locked(pdev, state);
6047 }
6048 #else
6049 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6050 {
6051         u16 aspm_ctl = 0;
6052
6053         if (state & PCIE_LINK_STATE_L0S)
6054                 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L0S;
6055         if (state & PCIE_LINK_STATE_L1)
6056                 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L1;
6057
6058         /* Both device and parent should have the same ASPM setting.
6059          * Disable ASPM in downstream component first and then upstream.
6060          */
6061         pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_ctl);
6062
6063         if (pdev->bus->self)
6064                 pcie_capability_clear_word(pdev->bus->self, PCI_EXP_LNKCTL,
6065                                            aspm_ctl);
6066 }
6067 #endif
6068 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6069 {
6070         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
6071                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
6072                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
6073
6074         __e1000e_disable_aspm(pdev, state);
6075 }
6076
6077 #ifdef CONFIG_PM
6078 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
6079 {
6080         return !!adapter->tx_ring->buffer_info;
6081 }
6082
6083 static int __e1000_resume(struct pci_dev *pdev)
6084 {
6085         struct net_device *netdev = pci_get_drvdata(pdev);
6086         struct e1000_adapter *adapter = netdev_priv(netdev);
6087         struct e1000_hw *hw = &adapter->hw;
6088         u16 aspm_disable_flag = 0;
6089         u32 err;
6090
6091         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6092                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6093         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6094                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6095         if (aspm_disable_flag)
6096                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6097
6098         pci_set_power_state(pdev, PCI_D0);
6099         pci_restore_state(pdev);
6100         pci_save_state(pdev);
6101
6102         e1000e_set_interrupt_capability(adapter);
6103         if (netif_running(netdev)) {
6104                 err = e1000_request_irq(adapter);
6105                 if (err)
6106                         return err;
6107         }
6108
6109         if (hw->mac.type >= e1000_pch2lan)
6110                 e1000_resume_workarounds_pchlan(&adapter->hw);
6111
6112         e1000e_power_up_phy(adapter);
6113
6114         /* report the system wakeup cause from S3/S4 */
6115         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
6116                 u16 phy_data;
6117
6118                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
6119                 if (phy_data) {
6120                         e_info("PHY Wakeup cause - %s\n",
6121                                 phy_data & E1000_WUS_EX ? "Unicast Packet" :
6122                                 phy_data & E1000_WUS_MC ? "Multicast Packet" :
6123                                 phy_data & E1000_WUS_BC ? "Broadcast Packet" :
6124                                 phy_data & E1000_WUS_MAG ? "Magic Packet" :
6125                                 phy_data & E1000_WUS_LNKC ?
6126                                 "Link Status Change" : "other");
6127                 }
6128                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
6129         } else {
6130                 u32 wus = er32(WUS);
6131                 if (wus) {
6132                         e_info("MAC Wakeup cause - %s\n",
6133                                 wus & E1000_WUS_EX ? "Unicast Packet" :
6134                                 wus & E1000_WUS_MC ? "Multicast Packet" :
6135                                 wus & E1000_WUS_BC ? "Broadcast Packet" :
6136                                 wus & E1000_WUS_MAG ? "Magic Packet" :
6137                                 wus & E1000_WUS_LNKC ? "Link Status Change" :
6138                                 "other");
6139                 }
6140                 ew32(WUS, ~0);
6141         }
6142
6143         e1000e_reset(adapter);
6144
6145         e1000_init_manageability_pt(adapter);
6146
6147         if (netif_running(netdev))
6148                 e1000e_up(adapter);
6149
6150         netif_device_attach(netdev);
6151
6152         /* If the controller has AMT, do not set DRV_LOAD until the interface
6153          * is up.  For all other cases, let the f/w know that the h/w is now
6154          * under the control of the driver.
6155          */
6156         if (!(adapter->flags & FLAG_HAS_AMT))
6157                 e1000e_get_hw_control(adapter);
6158
6159         return 0;
6160 }
6161
6162 #ifdef CONFIG_PM_SLEEP
6163 static int e1000_suspend(struct device *dev)
6164 {
6165         struct pci_dev *pdev = to_pci_dev(dev);
6166         int retval;
6167         bool wake;
6168
6169         retval = __e1000_shutdown(pdev, &wake, false);
6170         if (!retval)
6171                 e1000_complete_shutdown(pdev, true, wake);
6172
6173         return retval;
6174 }
6175
6176 static int e1000_resume(struct device *dev)
6177 {
6178         struct pci_dev *pdev = to_pci_dev(dev);
6179         struct net_device *netdev = pci_get_drvdata(pdev);
6180         struct e1000_adapter *adapter = netdev_priv(netdev);
6181
6182         if (e1000e_pm_ready(adapter))
6183                 adapter->idle_check = true;
6184
6185         return __e1000_resume(pdev);
6186 }
6187 #endif /* CONFIG_PM_SLEEP */
6188
6189 #ifdef CONFIG_PM_RUNTIME
6190 static int e1000_runtime_suspend(struct device *dev)
6191 {
6192         struct pci_dev *pdev = to_pci_dev(dev);
6193         struct net_device *netdev = pci_get_drvdata(pdev);
6194         struct e1000_adapter *adapter = netdev_priv(netdev);
6195
6196         if (e1000e_pm_ready(adapter)) {
6197                 bool wake;
6198
6199                 __e1000_shutdown(pdev, &wake, true);
6200         }
6201
6202         return 0;
6203 }
6204
6205 static int e1000_idle(struct device *dev)
6206 {
6207         struct pci_dev *pdev = to_pci_dev(dev);
6208         struct net_device *netdev = pci_get_drvdata(pdev);
6209         struct e1000_adapter *adapter = netdev_priv(netdev);
6210
6211         if (!e1000e_pm_ready(adapter))
6212                 return 0;
6213
6214         if (adapter->idle_check) {
6215                 adapter->idle_check = false;
6216                 if (!e1000e_has_link(adapter))
6217                         pm_schedule_suspend(dev, MSEC_PER_SEC);
6218         }
6219
6220         return -EBUSY;
6221 }
6222
6223 static int e1000_runtime_resume(struct device *dev)
6224 {
6225         struct pci_dev *pdev = to_pci_dev(dev);
6226         struct net_device *netdev = pci_get_drvdata(pdev);
6227         struct e1000_adapter *adapter = netdev_priv(netdev);
6228
6229         if (!e1000e_pm_ready(adapter))
6230                 return 0;
6231
6232         adapter->idle_check = !dev->power.runtime_auto;
6233         return __e1000_resume(pdev);
6234 }
6235 #endif /* CONFIG_PM_RUNTIME */
6236 #endif /* CONFIG_PM */
6237
6238 static void e1000_shutdown(struct pci_dev *pdev)
6239 {
6240         bool wake = false;
6241
6242         __e1000_shutdown(pdev, &wake, false);
6243
6244         if (system_state == SYSTEM_POWER_OFF)
6245                 e1000_complete_shutdown(pdev, false, wake);
6246 }
6247
6248 #ifdef CONFIG_NET_POLL_CONTROLLER
6249
6250 static irqreturn_t e1000_intr_msix(int irq, void *data)
6251 {
6252         struct net_device *netdev = data;
6253         struct e1000_adapter *adapter = netdev_priv(netdev);
6254
6255         if (adapter->msix_entries) {
6256                 int vector, msix_irq;
6257
6258                 vector = 0;
6259                 msix_irq = adapter->msix_entries[vector].vector;
6260                 disable_irq(msix_irq);
6261                 e1000_intr_msix_rx(msix_irq, netdev);
6262                 enable_irq(msix_irq);
6263
6264                 vector++;
6265                 msix_irq = adapter->msix_entries[vector].vector;
6266                 disable_irq(msix_irq);
6267                 e1000_intr_msix_tx(msix_irq, netdev);
6268                 enable_irq(msix_irq);
6269
6270                 vector++;
6271                 msix_irq = adapter->msix_entries[vector].vector;
6272                 disable_irq(msix_irq);
6273                 e1000_msix_other(msix_irq, netdev);
6274                 enable_irq(msix_irq);
6275         }
6276
6277         return IRQ_HANDLED;
6278 }
6279
6280 /**
6281  * e1000_netpoll
6282  * @netdev: network interface device structure
6283  *
6284  * Polling 'interrupt' - used by things like netconsole to send skbs
6285  * without having to re-enable interrupts. It's not called while
6286  * the interrupt routine is executing.
6287  */
6288 static void e1000_netpoll(struct net_device *netdev)
6289 {
6290         struct e1000_adapter *adapter = netdev_priv(netdev);
6291
6292         switch (adapter->int_mode) {
6293         case E1000E_INT_MODE_MSIX:
6294                 e1000_intr_msix(adapter->pdev->irq, netdev);
6295                 break;
6296         case E1000E_INT_MODE_MSI:
6297                 disable_irq(adapter->pdev->irq);
6298                 e1000_intr_msi(adapter->pdev->irq, netdev);
6299                 enable_irq(adapter->pdev->irq);
6300                 break;
6301         default: /* E1000E_INT_MODE_LEGACY */
6302                 disable_irq(adapter->pdev->irq);
6303                 e1000_intr(adapter->pdev->irq, netdev);
6304                 enable_irq(adapter->pdev->irq);
6305                 break;
6306         }
6307 }
6308 #endif
6309
6310 /**
6311  * e1000_io_error_detected - called when PCI error is detected
6312  * @pdev: Pointer to PCI device
6313  * @state: The current pci connection state
6314  *
6315  * This function is called after a PCI bus error affecting
6316  * this device has been detected.
6317  */
6318 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
6319                                                 pci_channel_state_t state)
6320 {
6321         struct net_device *netdev = pci_get_drvdata(pdev);
6322         struct e1000_adapter *adapter = netdev_priv(netdev);
6323
6324         netif_device_detach(netdev);
6325
6326         if (state == pci_channel_io_perm_failure)
6327                 return PCI_ERS_RESULT_DISCONNECT;
6328
6329         if (netif_running(netdev))
6330                 e1000e_down(adapter);
6331         pci_disable_device(pdev);
6332
6333         /* Request a slot slot reset. */
6334         return PCI_ERS_RESULT_NEED_RESET;
6335 }
6336
6337 /**
6338  * e1000_io_slot_reset - called after the pci bus has been reset.
6339  * @pdev: Pointer to PCI device
6340  *
6341  * Restart the card from scratch, as if from a cold-boot. Implementation
6342  * resembles the first-half of the e1000_resume routine.
6343  */
6344 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
6345 {
6346         struct net_device *netdev = pci_get_drvdata(pdev);
6347         struct e1000_adapter *adapter = netdev_priv(netdev);
6348         struct e1000_hw *hw = &adapter->hw;
6349         u16 aspm_disable_flag = 0;
6350         int err;
6351         pci_ers_result_t result;
6352
6353         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6354                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6355         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6356                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6357         if (aspm_disable_flag)
6358                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6359
6360         err = pci_enable_device_mem(pdev);
6361         if (err) {
6362                 dev_err(&pdev->dev,
6363                         "Cannot re-enable PCI device after reset.\n");
6364                 result = PCI_ERS_RESULT_DISCONNECT;
6365         } else {
6366                 pci_set_master(pdev);
6367                 pdev->state_saved = true;
6368                 pci_restore_state(pdev);
6369
6370                 pci_enable_wake(pdev, PCI_D3hot, 0);
6371                 pci_enable_wake(pdev, PCI_D3cold, 0);
6372
6373                 e1000e_reset(adapter);
6374                 ew32(WUS, ~0);
6375                 result = PCI_ERS_RESULT_RECOVERED;
6376         }
6377
6378         pci_cleanup_aer_uncorrect_error_status(pdev);
6379
6380         return result;
6381 }
6382
6383 /**
6384  * e1000_io_resume - called when traffic can start flowing again.
6385  * @pdev: Pointer to PCI device
6386  *
6387  * This callback is called when the error recovery driver tells us that
6388  * its OK to resume normal operation. Implementation resembles the
6389  * second-half of the e1000_resume routine.
6390  */
6391 static void e1000_io_resume(struct pci_dev *pdev)
6392 {
6393         struct net_device *netdev = pci_get_drvdata(pdev);
6394         struct e1000_adapter *adapter = netdev_priv(netdev);
6395
6396         e1000_init_manageability_pt(adapter);
6397
6398         if (netif_running(netdev)) {
6399                 if (e1000e_up(adapter)) {
6400                         dev_err(&pdev->dev,
6401                                 "can't bring device back up after reset\n");
6402                         return;
6403                 }
6404         }
6405
6406         netif_device_attach(netdev);
6407
6408         /* If the controller has AMT, do not set DRV_LOAD until the interface
6409          * is up.  For all other cases, let the f/w know that the h/w is now
6410          * under the control of the driver.
6411          */
6412         if (!(adapter->flags & FLAG_HAS_AMT))
6413                 e1000e_get_hw_control(adapter);
6414
6415 }
6416
6417 static void e1000_print_device_info(struct e1000_adapter *adapter)
6418 {
6419         struct e1000_hw *hw = &adapter->hw;
6420         struct net_device *netdev = adapter->netdev;
6421         u32 ret_val;
6422         u8 pba_str[E1000_PBANUM_LENGTH];
6423
6424         /* print bus type/speed/width info */
6425         e_info("(PCI Express:2.5GT/s:%s) %pM\n",
6426                /* bus width */
6427                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
6428                 "Width x1"),
6429                /* MAC address */
6430                netdev->dev_addr);
6431         e_info("Intel(R) PRO/%s Network Connection\n",
6432                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
6433         ret_val = e1000_read_pba_string_generic(hw, pba_str,
6434                                                 E1000_PBANUM_LENGTH);
6435         if (ret_val)
6436                 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
6437         e_info("MAC: %d, PHY: %d, PBA No: %s\n",
6438                hw->mac.type, hw->phy.type, pba_str);
6439 }
6440
6441 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
6442 {
6443         struct e1000_hw *hw = &adapter->hw;
6444         int ret_val;
6445         u16 buf = 0;
6446
6447         if (hw->mac.type != e1000_82573)
6448                 return;
6449
6450         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
6451         le16_to_cpus(&buf);
6452         if (!ret_val && (!(buf & (1 << 0)))) {
6453                 /* Deep Smart Power Down (DSPD) */
6454                 dev_warn(&adapter->pdev->dev,
6455                          "Warning: detected DSPD enabled in EEPROM\n");
6456         }
6457 }
6458
6459 static int e1000_set_features(struct net_device *netdev,
6460                               netdev_features_t features)
6461 {
6462         struct e1000_adapter *adapter = netdev_priv(netdev);
6463         netdev_features_t changed = features ^ netdev->features;
6464
6465         if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6466                 adapter->flags |= FLAG_TSO_FORCE;
6467
6468         if (!(changed & (NETIF_F_HW_VLAN_RX | NETIF_F_HW_VLAN_TX |
6469                          NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6470                          NETIF_F_RXALL)))
6471                 return 0;
6472
6473         if (changed & NETIF_F_RXFCS) {
6474                 if (features & NETIF_F_RXFCS) {
6475                         adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6476                 } else {
6477                         /* We need to take it back to defaults, which might mean
6478                          * stripping is still disabled at the adapter level.
6479                          */
6480                         if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6481                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6482                         else
6483                                 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6484                 }
6485         }
6486
6487         netdev->features = features;
6488
6489         if (netif_running(netdev))
6490                 e1000e_reinit_locked(adapter);
6491         else
6492                 e1000e_reset(adapter);
6493
6494         return 0;
6495 }
6496
6497 static const struct net_device_ops e1000e_netdev_ops = {
6498         .ndo_open               = e1000_open,
6499         .ndo_stop               = e1000_close,
6500         .ndo_start_xmit         = e1000_xmit_frame,
6501         .ndo_get_stats64        = e1000e_get_stats64,
6502         .ndo_set_rx_mode        = e1000e_set_rx_mode,
6503         .ndo_set_mac_address    = e1000_set_mac,
6504         .ndo_change_mtu         = e1000_change_mtu,
6505         .ndo_do_ioctl           = e1000_ioctl,
6506         .ndo_tx_timeout         = e1000_tx_timeout,
6507         .ndo_validate_addr      = eth_validate_addr,
6508
6509         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
6510         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
6511 #ifdef CONFIG_NET_POLL_CONTROLLER
6512         .ndo_poll_controller    = e1000_netpoll,
6513 #endif
6514         .ndo_set_features = e1000_set_features,
6515 };
6516
6517 /**
6518  * e1000_probe - Device Initialization Routine
6519  * @pdev: PCI device information struct
6520  * @ent: entry in e1000_pci_tbl
6521  *
6522  * Returns 0 on success, negative on failure
6523  *
6524  * e1000_probe initializes an adapter identified by a pci_dev structure.
6525  * The OS initialization, configuring of the adapter private structure,
6526  * and a hardware reset occur.
6527  **/
6528 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6529 {
6530         struct net_device *netdev;
6531         struct e1000_adapter *adapter;
6532         struct e1000_hw *hw;
6533         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
6534         resource_size_t mmio_start, mmio_len;
6535         resource_size_t flash_start, flash_len;
6536         static int cards_found;
6537         u16 aspm_disable_flag = 0;
6538         int i, err, pci_using_dac;
6539         u16 eeprom_data = 0;
6540         u16 eeprom_apme_mask = E1000_EEPROM_APME;
6541
6542         if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6543                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6544         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
6545                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6546         if (aspm_disable_flag)
6547                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6548
6549         err = pci_enable_device_mem(pdev);
6550         if (err)
6551                 return err;
6552
6553         pci_using_dac = 0;
6554         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
6555         if (!err) {
6556                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
6557                 if (!err)
6558                         pci_using_dac = 1;
6559         } else {
6560                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6561                 if (err) {
6562                         err = dma_set_coherent_mask(&pdev->dev,
6563                                                     DMA_BIT_MASK(32));
6564                         if (err) {
6565                                 dev_err(&pdev->dev, "No usable DMA configuration, aborting\n");
6566                                 goto err_dma;
6567                         }
6568                 }
6569         }
6570
6571         err = pci_request_selected_regions_exclusive(pdev,
6572                                           pci_select_bars(pdev, IORESOURCE_MEM),
6573                                           e1000e_driver_name);
6574         if (err)
6575                 goto err_pci_reg;
6576
6577         /* AER (Advanced Error Reporting) hooks */
6578         pci_enable_pcie_error_reporting(pdev);
6579
6580         pci_set_master(pdev);
6581         /* PCI config space info */
6582         err = pci_save_state(pdev);
6583         if (err)
6584                 goto err_alloc_etherdev;
6585
6586         err = -ENOMEM;
6587         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6588         if (!netdev)
6589                 goto err_alloc_etherdev;
6590
6591         SET_NETDEV_DEV(netdev, &pdev->dev);
6592
6593         netdev->irq = pdev->irq;
6594
6595         pci_set_drvdata(pdev, netdev);
6596         adapter = netdev_priv(netdev);
6597         hw = &adapter->hw;
6598         adapter->netdev = netdev;
6599         adapter->pdev = pdev;
6600         adapter->ei = ei;
6601         adapter->pba = ei->pba;
6602         adapter->flags = ei->flags;
6603         adapter->flags2 = ei->flags2;
6604         adapter->hw.adapter = adapter;
6605         adapter->hw.mac.type = ei->mac;
6606         adapter->max_hw_frame_size = ei->max_hw_frame_size;
6607         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
6608
6609         mmio_start = pci_resource_start(pdev, 0);
6610         mmio_len = pci_resource_len(pdev, 0);
6611
6612         err = -EIO;
6613         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6614         if (!adapter->hw.hw_addr)
6615                 goto err_ioremap;
6616
6617         if ((adapter->flags & FLAG_HAS_FLASH) &&
6618             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6619                 flash_start = pci_resource_start(pdev, 1);
6620                 flash_len = pci_resource_len(pdev, 1);
6621                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6622                 if (!adapter->hw.flash_address)
6623                         goto err_flashmap;
6624         }
6625
6626         /* construct the net_device struct */
6627         netdev->netdev_ops              = &e1000e_netdev_ops;
6628         e1000e_set_ethtool_ops(netdev);
6629         netdev->watchdog_timeo          = 5 * HZ;
6630         netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
6631         strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
6632
6633         netdev->mem_start = mmio_start;
6634         netdev->mem_end = mmio_start + mmio_len;
6635
6636         adapter->bd_number = cards_found++;
6637
6638         e1000e_check_options(adapter);
6639
6640         /* setup adapter struct */
6641         err = e1000_sw_init(adapter);
6642         if (err)
6643                 goto err_sw_init;
6644
6645         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6646         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6647         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6648
6649         err = ei->get_variants(adapter);
6650         if (err)
6651                 goto err_hw_init;
6652
6653         if ((adapter->flags & FLAG_IS_ICH) &&
6654             (adapter->flags & FLAG_READ_ONLY_NVM))
6655                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6656
6657         hw->mac.ops.get_bus_info(&adapter->hw);
6658
6659         adapter->hw.phy.autoneg_wait_to_complete = 0;
6660
6661         /* Copper options */
6662         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6663                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6664                 adapter->hw.phy.disable_polarity_correction = 0;
6665                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6666         }
6667
6668         if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
6669                 dev_info(&pdev->dev,
6670                          "PHY reset is blocked due to SOL/IDER session.\n");
6671
6672         /* Set initial default active device features */
6673         netdev->features = (NETIF_F_SG |
6674                             NETIF_F_HW_VLAN_RX |
6675                             NETIF_F_HW_VLAN_TX |
6676                             NETIF_F_TSO |
6677                             NETIF_F_TSO6 |
6678                             NETIF_F_RXHASH |
6679                             NETIF_F_RXCSUM |
6680                             NETIF_F_HW_CSUM);
6681
6682         /* Set user-changeable features (subset of all device features) */
6683         netdev->hw_features = netdev->features;
6684         netdev->hw_features |= NETIF_F_RXFCS;
6685         netdev->priv_flags |= IFF_SUPP_NOFCS;
6686         netdev->hw_features |= NETIF_F_RXALL;
6687
6688         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6689                 netdev->features |= NETIF_F_HW_VLAN_FILTER;
6690
6691         netdev->vlan_features |= (NETIF_F_SG |
6692                                   NETIF_F_TSO |
6693                                   NETIF_F_TSO6 |
6694                                   NETIF_F_HW_CSUM);
6695
6696         netdev->priv_flags |= IFF_UNICAST_FLT;
6697
6698         if (pci_using_dac) {
6699                 netdev->features |= NETIF_F_HIGHDMA;
6700                 netdev->vlan_features |= NETIF_F_HIGHDMA;
6701         }
6702
6703         if (e1000e_enable_mng_pass_thru(&adapter->hw))
6704                 adapter->flags |= FLAG_MNG_PT_ENABLED;
6705
6706         /* before reading the NVM, reset the controller to
6707          * put the device in a known good starting state
6708          */
6709         adapter->hw.mac.ops.reset_hw(&adapter->hw);
6710
6711         /* systems with ASPM and others may see the checksum fail on the first
6712          * attempt. Let's give it a few tries
6713          */
6714         for (i = 0;; i++) {
6715                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6716                         break;
6717                 if (i == 2) {
6718                         dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
6719                         err = -EIO;
6720                         goto err_eeprom;
6721                 }
6722         }
6723
6724         e1000_eeprom_checks(adapter);
6725
6726         /* copy the MAC address */
6727         if (e1000e_read_mac_addr(&adapter->hw))
6728                 dev_err(&pdev->dev,
6729                         "NVM Read Error while reading MAC address\n");
6730
6731         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6732
6733         if (!is_valid_ether_addr(netdev->dev_addr)) {
6734                 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
6735                         netdev->dev_addr);
6736                 err = -EIO;
6737                 goto err_eeprom;
6738         }
6739
6740         init_timer(&adapter->watchdog_timer);
6741         adapter->watchdog_timer.function = e1000_watchdog;
6742         adapter->watchdog_timer.data = (unsigned long) adapter;
6743
6744         init_timer(&adapter->phy_info_timer);
6745         adapter->phy_info_timer.function = e1000_update_phy_info;
6746         adapter->phy_info_timer.data = (unsigned long) adapter;
6747
6748         INIT_WORK(&adapter->reset_task, e1000_reset_task);
6749         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6750         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6751         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6752         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6753
6754         /* Initialize link parameters. User can change them with ethtool */
6755         adapter->hw.mac.autoneg = 1;
6756         adapter->fc_autoneg = true;
6757         adapter->hw.fc.requested_mode = e1000_fc_default;
6758         adapter->hw.fc.current_mode = e1000_fc_default;
6759         adapter->hw.phy.autoneg_advertised = 0x2f;
6760
6761         /* ring size defaults */
6762         adapter->rx_ring->count = E1000_DEFAULT_RXD;
6763         adapter->tx_ring->count = E1000_DEFAULT_TXD;
6764
6765         /* Initial Wake on LAN setting - If APM wake is enabled in
6766          * the EEPROM, enable the ACPI Magic Packet filter
6767          */
6768         if (adapter->flags & FLAG_APME_IN_WUC) {
6769                 /* APME bit in EEPROM is mapped to WUC.APME */
6770                 eeprom_data = er32(WUC);
6771                 eeprom_apme_mask = E1000_WUC_APME;
6772                 if ((hw->mac.type > e1000_ich10lan) &&
6773                     (eeprom_data & E1000_WUC_PHY_WAKE))
6774                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6775         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6776                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6777                     (adapter->hw.bus.func == 1))
6778                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B,
6779                                        1, &eeprom_data);
6780                 else
6781                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A,
6782                                        1, &eeprom_data);
6783         }
6784
6785         /* fetch WoL from EEPROM */
6786         if (eeprom_data & eeprom_apme_mask)
6787                 adapter->eeprom_wol |= E1000_WUFC_MAG;
6788
6789         /* now that we have the eeprom settings, apply the special cases
6790          * where the eeprom may be wrong or the board simply won't support
6791          * wake on lan on a particular port
6792          */
6793         if (!(adapter->flags & FLAG_HAS_WOL))
6794                 adapter->eeprom_wol = 0;
6795
6796         /* initialize the wol settings based on the eeprom settings */
6797         adapter->wol = adapter->eeprom_wol;
6798         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6799
6800         /* save off EEPROM version number */
6801         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6802
6803         /* reset the hardware with the new settings */
6804         e1000e_reset(adapter);
6805
6806         /* If the controller has AMT, do not set DRV_LOAD until the interface
6807          * is up.  For all other cases, let the f/w know that the h/w is now
6808          * under the control of the driver.
6809          */
6810         if (!(adapter->flags & FLAG_HAS_AMT))
6811                 e1000e_get_hw_control(adapter);
6812
6813         strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
6814         err = register_netdev(netdev);
6815         if (err)
6816                 goto err_register;
6817
6818         /* carrier off reporting is important to ethtool even BEFORE open */
6819         netif_carrier_off(netdev);
6820
6821         /* init PTP hardware clock */
6822         e1000e_ptp_init(adapter);
6823
6824         e1000_print_device_info(adapter);
6825
6826         if (pci_dev_run_wake(pdev))
6827                 pm_runtime_put_noidle(&pdev->dev);
6828
6829         return 0;
6830
6831 err_register:
6832         if (!(adapter->flags & FLAG_HAS_AMT))
6833                 e1000e_release_hw_control(adapter);
6834 err_eeprom:
6835         if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
6836                 e1000_phy_hw_reset(&adapter->hw);
6837 err_hw_init:
6838         kfree(adapter->tx_ring);
6839         kfree(adapter->rx_ring);
6840 err_sw_init:
6841         if (adapter->hw.flash_address)
6842                 iounmap(adapter->hw.flash_address);
6843         e1000e_reset_interrupt_capability(adapter);
6844 err_flashmap:
6845         iounmap(adapter->hw.hw_addr);
6846 err_ioremap:
6847         free_netdev(netdev);
6848 err_alloc_etherdev:
6849         pci_release_selected_regions(pdev,
6850                                      pci_select_bars(pdev, IORESOURCE_MEM));
6851 err_pci_reg:
6852 err_dma:
6853         pci_disable_device(pdev);
6854         return err;
6855 }
6856
6857 /**
6858  * e1000_remove - Device Removal Routine
6859  * @pdev: PCI device information struct
6860  *
6861  * e1000_remove is called by the PCI subsystem to alert the driver
6862  * that it should release a PCI device.  The could be caused by a
6863  * Hot-Plug event, or because the driver is going to be removed from
6864  * memory.
6865  **/
6866 static void e1000_remove(struct pci_dev *pdev)
6867 {
6868         struct net_device *netdev = pci_get_drvdata(pdev);
6869         struct e1000_adapter *adapter = netdev_priv(netdev);
6870         bool down = test_bit(__E1000_DOWN, &adapter->state);
6871
6872         e1000e_ptp_remove(adapter);
6873
6874         /* The timers may be rescheduled, so explicitly disable them
6875          * from being rescheduled.
6876          */
6877         if (!down)
6878                 set_bit(__E1000_DOWN, &adapter->state);
6879         del_timer_sync(&adapter->watchdog_timer);
6880         del_timer_sync(&adapter->phy_info_timer);
6881
6882         cancel_work_sync(&adapter->reset_task);
6883         cancel_work_sync(&adapter->watchdog_task);
6884         cancel_work_sync(&adapter->downshift_task);
6885         cancel_work_sync(&adapter->update_phy_task);
6886         cancel_work_sync(&adapter->print_hang_task);
6887
6888         if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
6889                 cancel_work_sync(&adapter->tx_hwtstamp_work);
6890                 if (adapter->tx_hwtstamp_skb) {
6891                         dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
6892                         adapter->tx_hwtstamp_skb = NULL;
6893                 }
6894         }
6895
6896         if (!(netdev->flags & IFF_UP))
6897                 e1000_power_down_phy(adapter);
6898
6899         /* Don't lie to e1000_close() down the road. */
6900         if (!down)
6901                 clear_bit(__E1000_DOWN, &adapter->state);
6902         unregister_netdev(netdev);
6903
6904         if (pci_dev_run_wake(pdev))
6905                 pm_runtime_get_noresume(&pdev->dev);
6906
6907         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
6908          * would have already happened in close and is redundant.
6909          */
6910         e1000e_release_hw_control(adapter);
6911
6912         e1000e_reset_interrupt_capability(adapter);
6913         kfree(adapter->tx_ring);
6914         kfree(adapter->rx_ring);
6915
6916         iounmap(adapter->hw.hw_addr);
6917         if (adapter->hw.flash_address)
6918                 iounmap(adapter->hw.flash_address);
6919         pci_release_selected_regions(pdev,
6920                                      pci_select_bars(pdev, IORESOURCE_MEM));
6921
6922         free_netdev(netdev);
6923
6924         /* AER disable */
6925         pci_disable_pcie_error_reporting(pdev);
6926
6927         pci_disable_device(pdev);
6928 }
6929
6930 /* PCI Error Recovery (ERS) */
6931 static const struct pci_error_handlers e1000_err_handler = {
6932         .error_detected = e1000_io_error_detected,
6933         .slot_reset = e1000_io_slot_reset,
6934         .resume = e1000_io_resume,
6935 };
6936
6937 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6938         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6939         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6940         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6941         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP), board_82571 },
6942         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6943         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6944         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6945         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6946         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6947
6948         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6949         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6950         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6951         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6952
6953         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6954         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6955         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6956
6957         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6958         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6959         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6960
6961         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6962           board_80003es2lan },
6963         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6964           board_80003es2lan },
6965         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6966           board_80003es2lan },
6967         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6968           board_80003es2lan },
6969
6970         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6971         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6972         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6973         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6974         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6975         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6976         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6977         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6978
6979         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6980         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6981         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6982         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6983         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6984         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6985         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6986         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6987         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6988
6989         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6990         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6991         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6992
6993         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6994         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6995         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6996
6997         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6998         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6999         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
7000         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
7001
7002         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
7003         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
7004
7005         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
7006         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
7007         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt },
7008         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt },
7009
7010         { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
7011 };
7012 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
7013
7014 #ifdef CONFIG_PM
7015 static const struct dev_pm_ops e1000_pm_ops = {
7016         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
7017         SET_RUNTIME_PM_OPS(e1000_runtime_suspend,
7018                                 e1000_runtime_resume, e1000_idle)
7019 };
7020 #endif
7021
7022 /* PCI Device API Driver */
7023 static struct pci_driver e1000_driver = {
7024         .name     = e1000e_driver_name,
7025         .id_table = e1000_pci_tbl,
7026         .probe    = e1000_probe,
7027         .remove   = e1000_remove,
7028 #ifdef CONFIG_PM
7029         .driver   = {
7030                 .pm = &e1000_pm_ops,
7031         },
7032 #endif
7033         .shutdown = e1000_shutdown,
7034         .err_handler = &e1000_err_handler
7035 };
7036
7037 /**
7038  * e1000_init_module - Driver Registration Routine
7039  *
7040  * e1000_init_module is the first routine called when the driver is
7041  * loaded. All it does is register with the PCI subsystem.
7042  **/
7043 static int __init e1000_init_module(void)
7044 {
7045         int ret;
7046         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
7047                 e1000e_driver_version);
7048         pr_info("Copyright(c) 1999 - 2012 Intel Corporation.\n");
7049         ret = pci_register_driver(&e1000_driver);
7050
7051         return ret;
7052 }
7053 module_init(e1000_init_module);
7054
7055 /**
7056  * e1000_exit_module - Driver Exit Cleanup Routine
7057  *
7058  * e1000_exit_module is called just before the driver is removed
7059  * from memory.
7060  **/
7061 static void __exit e1000_exit_module(void)
7062 {
7063         pci_unregister_driver(&e1000_driver);
7064 }
7065 module_exit(e1000_exit_module);
7066
7067
7068 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
7069 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
7070 MODULE_LICENSE("GPL");
7071 MODULE_VERSION(DRV_VERSION);
7072
7073 /* netdev.c */