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

   1 /*******************************************************************************
   2
   3   Intel PRO/1000 Linux driver
   4   Copyright(c) 1999 - 2013 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/ethtool.h>
  46 #include <linux/if_vlan.h>
  47 #include <linux/cpu.h>
  48 #include <linux/smp.h>
  49 #include <linux/pm_qos.h>
  50 #include <linux/pm_runtime.h>
  51 #include <linux/aer.h>
  52 #include <linux/prefetch.h>
  53
  54 #include "e1000.h"
  55
  56 #define DRV_EXTRAVERSION "-k"
  57
  58 #define DRV_VERSION "2.3.2" DRV_EXTRAVERSION
  59 char e1000e_driver_name[] = "e1000e";
  60 const char e1000e_driver_version[] = DRV_VERSION;
  61
  62 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK)
  63 static int debug = -1;
  64 module_param(debug, int, 0);
  65 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  66
  67 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state);
  68
  69 static const struct e1000_info *e1000_info_tbl[] = {
  70         [board_82571]           = &e1000_82571_info,
  71         [board_82572]           = &e1000_82572_info,
  72         [board_82573]           = &e1000_82573_info,
  73         [board_82574]           = &e1000_82574_info,
  74         [board_82583]           = &e1000_82583_info,
  75         [board_80003es2lan]     = &e1000_es2_info,
  76         [board_ich8lan]         = &e1000_ich8_info,
  77         [board_ich9lan]         = &e1000_ich9_info,
  78         [board_ich10lan]        = &e1000_ich10_info,
  79         [board_pchlan]          = &e1000_pch_info,
  80         [board_pch2lan]         = &e1000_pch2_info,
  81         [board_pch_lpt]         = &e1000_pch_lpt_info,
  82 };
  83
  84 struct e1000_reg_info {
  85         u32 ofs;
  86         char *name;
  87 };
  88
  89 static const struct e1000_reg_info e1000_reg_info_tbl[] = {
  90         /* General Registers */
  91         {E1000_CTRL, "CTRL"},
  92         {E1000_STATUS, "STATUS"},
  93         {E1000_CTRL_EXT, "CTRL_EXT"},
  94
  95         /* Interrupt Registers */
  96         {E1000_ICR, "ICR"},
  97
  98         /* Rx Registers */
  99         {E1000_RCTL, "RCTL"},
 100         {E1000_RDLEN(0), "RDLEN"},
 101         {E1000_RDH(0), "RDH"},
 102         {E1000_RDT(0), "RDT"},
 103         {E1000_RDTR, "RDTR"},
 104         {E1000_RXDCTL(0), "RXDCTL"},
 105         {E1000_ERT, "ERT"},
 106         {E1000_RDBAL(0), "RDBAL"},
 107         {E1000_RDBAH(0), "RDBAH"},
 108         {E1000_RDFH, "RDFH"},
 109         {E1000_RDFT, "RDFT"},
 110         {E1000_RDFHS, "RDFHS"},
 111         {E1000_RDFTS, "RDFTS"},
 112         {E1000_RDFPC, "RDFPC"},
 113
 114         /* Tx Registers */
 115         {E1000_TCTL, "TCTL"},
 116         {E1000_TDBAL(0), "TDBAL"},
 117         {E1000_TDBAH(0), "TDBAH"},
 118         {E1000_TDLEN(0), "TDLEN"},
 119         {E1000_TDH(0), "TDH"},
 120         {E1000_TDT(0), "TDT"},
 121         {E1000_TIDV, "TIDV"},
 122         {E1000_TXDCTL(0), "TXDCTL"},
 123         {E1000_TADV, "TADV"},
 124         {E1000_TARC(0), "TARC"},
 125         {E1000_TDFH, "TDFH"},
 126         {E1000_TDFT, "TDFT"},
 127         {E1000_TDFHS, "TDFHS"},
 128         {E1000_TDFTS, "TDFTS"},
 129         {E1000_TDFPC, "TDFPC"},
 130
 131         /* List Terminator */
 132         {0, NULL}
 133 };
 134
 135 /**
 136  * e1000_regdump - register printout routine
 137  * @hw: pointer to the HW structure
 138  * @reginfo: pointer to the register info table
 139  **/
 140 static void e1000_regdump(struct e1000_hw *hw, struct e1000_reg_info *reginfo)
 141 {
 142         int n = 0;
 143         char rname[16];
 144         u32 regs[8];
 145
 146         switch (reginfo->ofs) {
 147         case E1000_RXDCTL(0):
 148                 for (n = 0; n < 2; n++)
 149                         regs[n] = __er32(hw, E1000_RXDCTL(n));
 150                 break;
 151         case E1000_TXDCTL(0):
 152                 for (n = 0; n < 2; n++)
 153                         regs[n] = __er32(hw, E1000_TXDCTL(n));
 154                 break;
 155         case E1000_TARC(0):
 156                 for (n = 0; n < 2; n++)
 157                         regs[n] = __er32(hw, E1000_TARC(n));
 158                 break;
 159         default:
 160                 pr_info("%-15s %08x\n",
 161                         reginfo->name, __er32(hw, reginfo->ofs));
 162                 return;
 163         }
 164
 165         snprintf(rname, 16, "%s%s", reginfo->name, "[0-1]");
 166         pr_info("%-15s %08x %08x\n", rname, regs[0], regs[1]);
 167 }
 168
 169 static void e1000e_dump_ps_pages(struct e1000_adapter *adapter,
 170                                  struct e1000_buffer *bi)
 171 {
 172         int i;
 173         struct e1000_ps_page *ps_page;
 174
 175         for (i = 0; i < adapter->rx_ps_pages; i++) {
 176                 ps_page = &bi->ps_pages[i];
 177
 178                 if (ps_page->page) {
 179                         pr_info("packet dump for ps_page %d:\n", i);
 180                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 181                                        16, 1, page_address(ps_page->page),
 182                                        PAGE_SIZE, true);
 183                 }
 184         }
 185 }
 186
 187 /**
 188  * e1000e_dump - Print registers, Tx-ring and Rx-ring
 189  * @adapter: board private structure
 190  **/
 191 static void e1000e_dump(struct e1000_adapter *adapter)
 192 {
 193         struct net_device *netdev = adapter->netdev;
 194         struct e1000_hw *hw = &adapter->hw;
 195         struct e1000_reg_info *reginfo;
 196         struct e1000_ring *tx_ring = adapter->tx_ring;
 197         struct e1000_tx_desc *tx_desc;
 198         struct my_u0 {
 199                 __le64 a;
 200                 __le64 b;
 201         } *u0;
 202         struct e1000_buffer *buffer_info;
 203         struct e1000_ring *rx_ring = adapter->rx_ring;
 204         union e1000_rx_desc_packet_split *rx_desc_ps;
 205         union e1000_rx_desc_extended *rx_desc;
 206         struct my_u1 {
 207                 __le64 a;
 208                 __le64 b;
 209                 __le64 c;
 210                 __le64 d;
 211         } *u1;
 212         u32 staterr;
 213         int i = 0;
 214
 215         if (!netif_msg_hw(adapter))
 216                 return;
 217
 218         /* Print netdevice Info */
 219         if (netdev) {
 220                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 221                 pr_info("Device Name     state            trans_start      last_rx\n");
 222                 pr_info("%-15s %016lX %016lX %016lX\n", netdev->name,
 223                         netdev->state, netdev->trans_start, netdev->last_rx);
 224         }
 225
 226         /* Print Registers */
 227         dev_info(&adapter->pdev->dev, "Register Dump\n");
 228         pr_info(" Register Name   Value\n");
 229         for (reginfo = (struct e1000_reg_info *)e1000_reg_info_tbl;
 230              reginfo->name; reginfo++) {
 231                 e1000_regdump(hw, reginfo);
 232         }
 233
 234         /* Print Tx Ring Summary */
 235         if (!netdev || !netif_running(netdev))
 236                 return;
 237
 238         dev_info(&adapter->pdev->dev, "Tx Ring Summary\n");
 239         pr_info("Queue [NTU] [NTC] [bi(ntc)->dma  ] leng ntw timestamp\n");
 240         buffer_info = &tx_ring->buffer_info[tx_ring->next_to_clean];
 241         pr_info(" %5d %5X %5X %016llX %04X %3X %016llX\n",
 242                 0, tx_ring->next_to_use, tx_ring->next_to_clean,
 243                 (unsigned long long)buffer_info->dma,
 244                 buffer_info->length,
 245                 buffer_info->next_to_watch,
 246                 (unsigned long long)buffer_info->time_stamp);
 247
 248         /* Print Tx Ring */
 249         if (!netif_msg_tx_done(adapter))
 250                 goto rx_ring_summary;
 251
 252         dev_info(&adapter->pdev->dev, "Tx Ring Dump\n");
 253
 254         /* Transmit Descriptor Formats - DEXT[29] is 0 (Legacy) or 1 (Extended)
 255          *
 256          * Legacy Transmit Descriptor
 257          *   +--------------------------------------------------------------+
 258          * 0 |         Buffer Address [63:0] (Reserved on Write Back)       |
 259          *   +--------------------------------------------------------------+
 260          * 8 | Special  |    CSS     | Status |  CMD    |  CSO   |  Length  |
 261          *   +--------------------------------------------------------------+
 262          *   63       48 47        36 35    32 31     24 23    16 15        0
 263          *
 264          * Extended Context Descriptor (DTYP=0x0) for TSO or checksum offload
 265          *   63      48 47    40 39       32 31             16 15    8 7      0
 266          *   +----------------------------------------------------------------+
 267          * 0 |  TUCSE  | TUCS0  |   TUCSS   |     IPCSE       | IPCS0 | IPCSS |
 268          *   +----------------------------------------------------------------+
 269          * 8 |   MSS   | HDRLEN | RSV | STA | TUCMD | DTYP |      PAYLEN      |
 270          *   +----------------------------------------------------------------+
 271          *   63      48 47    40 39 36 35 32 31   24 23  20 19                0
 272          *
 273          * Extended Data Descriptor (DTYP=0x1)
 274          *   +----------------------------------------------------------------+
 275          * 0 |                     Buffer Address [63:0]                      |
 276          *   +----------------------------------------------------------------+
 277          * 8 | VLAN tag |  POPTS  | Rsvd | Status | Command | DTYP |  DTALEN  |
 278          *   +----------------------------------------------------------------+
 279          *   63       48 47     40 39  36 35    32 31     24 23  20 19        0
 280          */
 281         pr_info("Tl[desc]     [address 63:0  ] [SpeCssSCmCsLen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Legacy format\n");
 282         pr_info("Tc[desc]     [Ce CoCsIpceCoS] [MssHlRSCm0Plen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Context format\n");
 283         pr_info("Td[desc]     [address 63:0  ] [VlaPoRSCm1Dlen] [bi->dma       ] leng  ntw timestamp        bi->skb <-- Ext Data format\n");
 284         for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 285                 const char *next_desc;
 286                 tx_desc = E1000_TX_DESC(*tx_ring, i);
 287                 buffer_info = &tx_ring->buffer_info[i];
 288                 u0 = (struct my_u0 *)tx_desc;
 289                 if (i == tx_ring->next_to_use && i == tx_ring->next_to_clean)
 290                         next_desc = " NTC/U";
 291                 else if (i == tx_ring->next_to_use)
 292                         next_desc = " NTU";
 293                 else if (i == tx_ring->next_to_clean)
 294                         next_desc = " NTC";
 295                 else
 296                         next_desc = "";
 297                 pr_info("T%c[0x%03X]    %016llX %016llX %016llX %04X  %3X %016llX %p%s\n",
 298                         (!(le64_to_cpu(u0->b) & (1 << 29)) ? 'l' :
 299                          ((le64_to_cpu(u0->b) & (1 << 20)) ? 'd' : 'c')),
 300                         i,
 301                         (unsigned long long)le64_to_cpu(u0->a),
 302                         (unsigned long long)le64_to_cpu(u0->b),
 303                         (unsigned long long)buffer_info->dma,
 304                         buffer_info->length, buffer_info->next_to_watch,
 305                         (unsigned long long)buffer_info->time_stamp,
 306                         buffer_info->skb, next_desc);
 307
 308                 if (netif_msg_pktdata(adapter) && buffer_info->skb)
 309                         print_hex_dump(KERN_INFO, "", DUMP_PREFIX_ADDRESS,
 310                                        16, 1, buffer_info->skb->data,
 311                                        buffer_info->skb->len, true);
 312         }
 313
 314         /* Print Rx Ring Summary */
 315 rx_ring_summary:
 316         dev_info(&adapter->pdev->dev, "Rx Ring Summary\n");
 317         pr_info("Queue [NTU] [NTC]\n");
 318         pr_info(" %5d %5X %5X\n",
 319                 0, rx_ring->next_to_use, rx_ring->next_to_clean);
 320
 321         /* Print Rx Ring */
 322         if (!netif_msg_rx_status(adapter))
 323                 return;
 324
 325         dev_info(&adapter->pdev->dev, "Rx Ring Dump\n");
 326         switch (adapter->rx_ps_pages) {
 327         case 1:
 328         case 2:
 329         case 3:
 330                 /* [Extended] Packet Split Receive Descriptor Format
 331                  *
 332                  *    +-----------------------------------------------------+
 333                  *  0 |                Buffer Address 0 [63:0]              |
 334                  *    +-----------------------------------------------------+
 335                  *  8 |                Buffer Address 1 [63:0]              |
 336                  *    +-----------------------------------------------------+
 337                  * 16 |                Buffer Address 2 [63:0]              |
 338                  *    +-----------------------------------------------------+
 339                  * 24 |                Buffer Address 3 [63:0]              |
 340                  *    +-----------------------------------------------------+
 341                  */
 342                 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");
 343                 /* [Extended] Receive Descriptor (Write-Back) Format
 344                  *
 345                  *   63       48 47    32 31     13 12    8 7    4 3        0
 346                  *   +------------------------------------------------------+
 347                  * 0 | Packet   | IP     |  Rsvd   | MRQ   | Rsvd | MRQ RSS |
 348                  *   | Checksum | Ident  |         | Queue |      |  Type   |
 349                  *   +------------------------------------------------------+
 350                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 351                  *   +------------------------------------------------------+
 352                  *   63       48 47    32 31            20 19               0
 353                  */
 354                 pr_info("RWB[desc]      [ck ipid mrqhsh] [vl   l0 ee  es] [ l3  l2  l1 hs] [reserved      ] ---------------- [bi->skb] <-- Ext Rx Write-Back format\n");
 355                 for (i = 0; i < rx_ring->count; i++) {
 356                         const char *next_desc;
 357                         buffer_info = &rx_ring->buffer_info[i];
 358                         rx_desc_ps = E1000_RX_DESC_PS(*rx_ring, i);
 359                         u1 = (struct my_u1 *)rx_desc_ps;
 360                         staterr =
 361                             le32_to_cpu(rx_desc_ps->wb.middle.status_error);
 362
 363                         if (i == rx_ring->next_to_use)
 364                                 next_desc = " NTU";
 365                         else if (i == rx_ring->next_to_clean)
 366                                 next_desc = " NTC";
 367                         else
 368                                 next_desc = "";
 369
 370                         if (staterr & E1000_RXD_STAT_DD) {
 371                                 /* Descriptor Done */
 372                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX ---------------- %p%s\n",
 373                                         "RWB", i,
 374                                         (unsigned long long)le64_to_cpu(u1->a),
 375                                         (unsigned long long)le64_to_cpu(u1->b),
 376                                         (unsigned long long)le64_to_cpu(u1->c),
 377                                         (unsigned long long)le64_to_cpu(u1->d),
 378                                         buffer_info->skb, next_desc);
 379                         } else {
 380                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %016llX %016llX %p%s\n",
 381                                         "R  ", i,
 382                                         (unsigned long long)le64_to_cpu(u1->a),
 383                                         (unsigned long long)le64_to_cpu(u1->b),
 384                                         (unsigned long long)le64_to_cpu(u1->c),
 385                                         (unsigned long long)le64_to_cpu(u1->d),
 386                                         (unsigned long long)buffer_info->dma,
 387                                         buffer_info->skb, next_desc);
 388
 389                                 if (netif_msg_pktdata(adapter))
 390                                         e1000e_dump_ps_pages(adapter,
 391                                                              buffer_info);
 392                         }
 393                 }
 394                 break;
 395         default:
 396         case 0:
 397                 /* Extended Receive Descriptor (Read) Format
 398                  *
 399                  *   +-----------------------------------------------------+
 400                  * 0 |                Buffer Address [63:0]                |
 401                  *   +-----------------------------------------------------+
 402                  * 8 |                      Reserved                       |
 403                  *   +-----------------------------------------------------+
 404                  */
 405                 pr_info("R  [desc]      [buf addr 63:0 ] [reserved 63:0 ] [bi->dma       ] [bi->skb] <-- Ext (Read) format\n");
 406                 /* Extended Receive Descriptor (Write-Back) Format
 407                  *
 408                  *   63       48 47    32 31    24 23            4 3        0
 409                  *   +------------------------------------------------------+
 410                  *   |     RSS Hash      |        |               |         |
 411                  * 0 +-------------------+  Rsvd  |   Reserved    | MRQ RSS |
 412                  *   | Packet   | IP     |        |               |  Type   |
 413                  *   | Checksum | Ident  |        |               |         |
 414                  *   +------------------------------------------------------+
 415                  * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 416                  *   +------------------------------------------------------+
 417                  *   63       48 47    32 31            20 19               0
 418                  */
 419                 pr_info("RWB[desc]      [cs ipid    mrq] [vt   ln xe  xs] [bi->skb] <-- Ext (Write-Back) format\n");
 420
 421                 for (i = 0; i < rx_ring->count; i++) {
 422                         const char *next_desc;
 423
 424                         buffer_info = &rx_ring->buffer_info[i];
 425                         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 426                         u1 = (struct my_u1 *)rx_desc;
 427                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 428
 429                         if (i == rx_ring->next_to_use)
 430                                 next_desc = " NTU";
 431                         else if (i == rx_ring->next_to_clean)
 432                                 next_desc = " NTC";
 433                         else
 434                                 next_desc = "";
 435
 436                         if (staterr & E1000_RXD_STAT_DD) {
 437                                 /* Descriptor Done */
 438                                 pr_info("%s[0x%03X]     %016llX %016llX ---------------- %p%s\n",
 439                                         "RWB", i,
 440                                         (unsigned long long)le64_to_cpu(u1->a),
 441                                         (unsigned long long)le64_to_cpu(u1->b),
 442                                         buffer_info->skb, next_desc);
 443                         } else {
 444                                 pr_info("%s[0x%03X]     %016llX %016llX %016llX %p%s\n",
 445                                         "R  ", i,
 446                                         (unsigned long long)le64_to_cpu(u1->a),
 447                                         (unsigned long long)le64_to_cpu(u1->b),
 448                                         (unsigned long long)buffer_info->dma,
 449                                         buffer_info->skb, next_desc);
 450
 451                                 if (netif_msg_pktdata(adapter) &&
 452                                     buffer_info->skb)
 453                                         print_hex_dump(KERN_INFO, "",
 454                                                        DUMP_PREFIX_ADDRESS, 16,
 455                                                        1,
 456                                                        buffer_info->skb->data,
 457                                                        adapter->rx_buffer_len,
 458                                                        true);
 459                         }
 460                 }
 461         }
 462 }
 463
 464 /**
 465  * e1000_desc_unused - calculate if we have unused descriptors
 466  **/
 467 static int e1000_desc_unused(struct e1000_ring *ring)
 468 {
 469         if (ring->next_to_clean > ring->next_to_use)
 470                 return ring->next_to_clean - ring->next_to_use - 1;
 471
 472         return ring->count + ring->next_to_clean - ring->next_to_use - 1;
 473 }
 474
 475 /**
 476  * e1000e_systim_to_hwtstamp - convert system time value to hw time stamp
 477  * @adapter: board private structure
 478  * @hwtstamps: time stamp structure to update
 479  * @systim: unsigned 64bit system time value.
 480  *
 481  * Convert the system time value stored in the RX/TXSTMP registers into a
 482  * hwtstamp which can be used by the upper level time stamping functions.
 483  *
 484  * The 'systim_lock' spinlock is used to protect the consistency of the
 485  * system time value. This is needed because reading the 64 bit time
 486  * value involves reading two 32 bit registers. The first read latches the
 487  * value.
 488  **/
 489 static void e1000e_systim_to_hwtstamp(struct e1000_adapter *adapter,
 490                                       struct skb_shared_hwtstamps *hwtstamps,
 491                                       u64 systim)
 492 {
 493         u64 ns;
 494         unsigned long flags;
 495
 496         spin_lock_irqsave(&adapter->systim_lock, flags);
 497         ns = timecounter_cyc2time(&adapter->tc, systim);
 498         spin_unlock_irqrestore(&adapter->systim_lock, flags);
 499
 500         memset(hwtstamps, 0, sizeof(*hwtstamps));
 501         hwtstamps->hwtstamp = ns_to_ktime(ns);
 502 }
 503
 504 /**
 505  * e1000e_rx_hwtstamp - utility function which checks for Rx time stamp
 506  * @adapter: board private structure
 507  * @status: descriptor extended error and status field
 508  * @skb: particular skb to include time stamp
 509  *
 510  * If the time stamp is valid, convert it into the timecounter ns value
 511  * and store that result into the shhwtstamps structure which is passed
 512  * up the network stack.
 513  **/
 514 static void e1000e_rx_hwtstamp(struct e1000_adapter *adapter, u32 status,
 515                                struct sk_buff *skb)
 516 {
 517         struct e1000_hw *hw = &adapter->hw;
 518         u64 rxstmp;
 519
 520         if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP) ||
 521             !(status & E1000_RXDEXT_STATERR_TST) ||
 522             !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID))
 523                 return;
 524
 525         /* The Rx time stamp registers contain the time stamp.  No other
 526          * received packet will be time stamped until the Rx time stamp
 527          * registers are read.  Because only one packet can be time stamped
 528          * at a time, the register values must belong to this packet and
 529          * therefore none of the other additional attributes need to be
 530          * compared.
 531          */
 532         rxstmp = (u64)er32(RXSTMPL);
 533         rxstmp |= (u64)er32(RXSTMPH) << 32;
 534         e1000e_systim_to_hwtstamp(adapter, skb_hwtstamps(skb), rxstmp);
 535
 536         adapter->flags2 &= ~FLAG2_CHECK_RX_HWTSTAMP;
 537 }
 538
 539 /**
 540  * e1000_receive_skb - helper function to handle Rx indications
 541  * @adapter: board private structure
 542  * @staterr: descriptor extended error and status field as written by hardware
 543  * @vlan: descriptor vlan field as written by hardware (no le/be conversion)
 544  * @skb: pointer to sk_buff to be indicated to stack
 545  **/
 546 static void e1000_receive_skb(struct e1000_adapter *adapter,
 547                               struct net_device *netdev, struct sk_buff *skb,
 548                               u32 staterr, __le16 vlan)
 549 {
 550         u16 tag = le16_to_cpu(vlan);
 551
 552         e1000e_rx_hwtstamp(adapter, staterr, skb);
 553
 554         skb->protocol = eth_type_trans(skb, netdev);
 555
 556         if (staterr & E1000_RXD_STAT_VP)
 557                 __vlan_hwaccel_put_tag(skb, htons(ETH_P_8021Q), tag);
 558
 559         napi_gro_receive(&adapter->napi, skb);
 560 }
 561
 562 /**
 563  * e1000_rx_checksum - Receive Checksum Offload
 564  * @adapter: board private structure
 565  * @status_err: receive descriptor status and error fields
 566  * @csum: receive descriptor csum field
 567  * @sk_buff: socket buffer with received data
 568  **/
 569 static void e1000_rx_checksum(struct e1000_adapter *adapter, u32 status_err,
 570                               struct sk_buff *skb)
 571 {
 572         u16 status = (u16)status_err;
 573         u8 errors = (u8)(status_err >> 24);
 574
 575         skb_checksum_none_assert(skb);
 576
 577         /* Rx checksum disabled */
 578         if (!(adapter->netdev->features & NETIF_F_RXCSUM))
 579                 return;
 580
 581         /* Ignore Checksum bit is set */
 582         if (status & E1000_RXD_STAT_IXSM)
 583                 return;
 584
 585         /* TCP/UDP checksum error bit or IP checksum error bit is set */
 586         if (errors & (E1000_RXD_ERR_TCPE | E1000_RXD_ERR_IPE)) {
 587                 /* let the stack verify checksum errors */
 588                 adapter->hw_csum_err++;
 589                 return;
 590         }
 591
 592         /* TCP/UDP Checksum has not been calculated */
 593         if (!(status & (E1000_RXD_STAT_TCPCS | E1000_RXD_STAT_UDPCS)))
 594                 return;
 595
 596         /* It must be a TCP or UDP packet with a valid checksum */
 597         skb->ip_summed = CHECKSUM_UNNECESSARY;
 598         adapter->hw_csum_good++;
 599 }
 600
 601 static void e1000e_update_rdt_wa(struct e1000_ring *rx_ring, unsigned int i)
 602 {
 603         struct e1000_adapter *adapter = rx_ring->adapter;
 604         struct e1000_hw *hw = &adapter->hw;
 605         s32 ret_val = __ew32_prepare(hw);
 606
 607         writel(i, rx_ring->tail);
 608
 609         if (unlikely(!ret_val && (i != readl(rx_ring->tail)))) {
 610                 u32 rctl = er32(RCTL);
 611                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
 612                 e_err("ME firmware caused invalid RDT - resetting\n");
 613                 schedule_work(&adapter->reset_task);
 614         }
 615 }
 616
 617 static void e1000e_update_tdt_wa(struct e1000_ring *tx_ring, unsigned int i)
 618 {
 619         struct e1000_adapter *adapter = tx_ring->adapter;
 620         struct e1000_hw *hw = &adapter->hw;
 621         s32 ret_val = __ew32_prepare(hw);
 622
 623         writel(i, tx_ring->tail);
 624
 625         if (unlikely(!ret_val && (i != readl(tx_ring->tail)))) {
 626                 u32 tctl = er32(TCTL);
 627                 ew32(TCTL, tctl & ~E1000_TCTL_EN);
 628                 e_err("ME firmware caused invalid TDT - resetting\n");
 629                 schedule_work(&adapter->reset_task);
 630         }
 631 }
 632
 633 /**
 634  * e1000_alloc_rx_buffers - Replace used receive buffers
 635  * @rx_ring: Rx descriptor ring
 636  **/
 637 static void e1000_alloc_rx_buffers(struct e1000_ring *rx_ring,
 638                                    int cleaned_count, gfp_t gfp)
 639 {
 640         struct e1000_adapter *adapter = rx_ring->adapter;
 641         struct net_device *netdev = adapter->netdev;
 642         struct pci_dev *pdev = adapter->pdev;
 643         union e1000_rx_desc_extended *rx_desc;
 644         struct e1000_buffer *buffer_info;
 645         struct sk_buff *skb;
 646         unsigned int i;
 647         unsigned int bufsz = adapter->rx_buffer_len;
 648
 649         i = rx_ring->next_to_use;
 650         buffer_info = &rx_ring->buffer_info[i];
 651
 652         while (cleaned_count--) {
 653                 skb = buffer_info->skb;
 654                 if (skb) {
 655                         skb_trim(skb, 0);
 656                         goto map_skb;
 657                 }
 658
 659                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 660                 if (!skb) {
 661                         /* Better luck next round */
 662                         adapter->alloc_rx_buff_failed++;
 663                         break;
 664                 }
 665
 666                 buffer_info->skb = skb;
 667 map_skb:
 668                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 669                                                   adapter->rx_buffer_len,
 670                                                   DMA_FROM_DEVICE);
 671                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 672                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 673                         adapter->rx_dma_failed++;
 674                         break;
 675                 }
 676
 677                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 678                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 679
 680                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 681                         /* Force memory writes to complete before letting h/w
 682                          * know there are new descriptors to fetch.  (Only
 683                          * applicable for weak-ordered memory model archs,
 684                          * such as IA-64).
 685                          */
 686                         wmb();
 687                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 688                                 e1000e_update_rdt_wa(rx_ring, i);
 689                         else
 690                                 writel(i, rx_ring->tail);
 691                 }
 692                 i++;
 693                 if (i == rx_ring->count)
 694                         i = 0;
 695                 buffer_info = &rx_ring->buffer_info[i];
 696         }
 697
 698         rx_ring->next_to_use = i;
 699 }
 700
 701 /**
 702  * e1000_alloc_rx_buffers_ps - Replace used receive buffers; packet split
 703  * @rx_ring: Rx descriptor ring
 704  **/
 705 static void e1000_alloc_rx_buffers_ps(struct e1000_ring *rx_ring,
 706                                       int cleaned_count, gfp_t gfp)
 707 {
 708         struct e1000_adapter *adapter = rx_ring->adapter;
 709         struct net_device *netdev = adapter->netdev;
 710         struct pci_dev *pdev = adapter->pdev;
 711         union e1000_rx_desc_packet_split *rx_desc;
 712         struct e1000_buffer *buffer_info;
 713         struct e1000_ps_page *ps_page;
 714         struct sk_buff *skb;
 715         unsigned int i, j;
 716
 717         i = rx_ring->next_to_use;
 718         buffer_info = &rx_ring->buffer_info[i];
 719
 720         while (cleaned_count--) {
 721                 rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
 722
 723                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
 724                         ps_page = &buffer_info->ps_pages[j];
 725                         if (j >= adapter->rx_ps_pages) {
 726                                 /* all unused desc entries get hw null ptr */
 727                                 rx_desc->read.buffer_addr[j + 1] =
 728                                     ~cpu_to_le64(0);
 729                                 continue;
 730                         }
 731                         if (!ps_page->page) {
 732                                 ps_page->page = alloc_page(gfp);
 733                                 if (!ps_page->page) {
 734                                         adapter->alloc_rx_buff_failed++;
 735                                         goto no_buffers;
 736                                 }
 737                                 ps_page->dma = dma_map_page(&pdev->dev,
 738                                                             ps_page->page,
 739                                                             0, PAGE_SIZE,
 740                                                             DMA_FROM_DEVICE);
 741                                 if (dma_mapping_error(&pdev->dev,
 742                                                       ps_page->dma)) {
 743                                         dev_err(&adapter->pdev->dev,
 744                                                 "Rx DMA page map failed\n");
 745                                         adapter->rx_dma_failed++;
 746                                         goto no_buffers;
 747                                 }
 748                         }
 749                         /* Refresh the desc even if buffer_addrs
 750                          * didn't change because each write-back
 751                          * erases this info.
 752                          */
 753                         rx_desc->read.buffer_addr[j + 1] =
 754                             cpu_to_le64(ps_page->dma);
 755                 }
 756
 757                 skb = __netdev_alloc_skb_ip_align(netdev, adapter->rx_ps_bsize0,
 758                                                   gfp);
 759
 760                 if (!skb) {
 761                         adapter->alloc_rx_buff_failed++;
 762                         break;
 763                 }
 764
 765                 buffer_info->skb = skb;
 766                 buffer_info->dma = dma_map_single(&pdev->dev, skb->data,
 767                                                   adapter->rx_ps_bsize0,
 768                                                   DMA_FROM_DEVICE);
 769                 if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 770                         dev_err(&pdev->dev, "Rx DMA map failed\n");
 771                         adapter->rx_dma_failed++;
 772                         /* cleanup skb */
 773                         dev_kfree_skb_any(skb);
 774                         buffer_info->skb = NULL;
 775                         break;
 776                 }
 777
 778                 rx_desc->read.buffer_addr[0] = cpu_to_le64(buffer_info->dma);
 779
 780                 if (unlikely(!(i & (E1000_RX_BUFFER_WRITE - 1)))) {
 781                         /* Force memory writes to complete before letting h/w
 782                          * know there are new descriptors to fetch.  (Only
 783                          * applicable for weak-ordered memory model archs,
 784                          * such as IA-64).
 785                          */
 786                         wmb();
 787                         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 788                                 e1000e_update_rdt_wa(rx_ring, i << 1);
 789                         else
 790                                 writel(i << 1, rx_ring->tail);
 791                 }
 792
 793                 i++;
 794                 if (i == rx_ring->count)
 795                         i = 0;
 796                 buffer_info = &rx_ring->buffer_info[i];
 797         }
 798
 799 no_buffers:
 800         rx_ring->next_to_use = i;
 801 }
 802
 803 /**
 804  * e1000_alloc_jumbo_rx_buffers - Replace used jumbo receive buffers
 805  * @rx_ring: Rx descriptor ring
 806  * @cleaned_count: number of buffers to allocate this pass
 807  **/
 808
 809 static void e1000_alloc_jumbo_rx_buffers(struct e1000_ring *rx_ring,
 810                                          int cleaned_count, gfp_t gfp)
 811 {
 812         struct e1000_adapter *adapter = rx_ring->adapter;
 813         struct net_device *netdev = adapter->netdev;
 814         struct pci_dev *pdev = adapter->pdev;
 815         union e1000_rx_desc_extended *rx_desc;
 816         struct e1000_buffer *buffer_info;
 817         struct sk_buff *skb;
 818         unsigned int i;
 819         unsigned int bufsz = 256 - 16;  /* for skb_reserve */
 820
 821         i = rx_ring->next_to_use;
 822         buffer_info = &rx_ring->buffer_info[i];
 823
 824         while (cleaned_count--) {
 825                 skb = buffer_info->skb;
 826                 if (skb) {
 827                         skb_trim(skb, 0);
 828                         goto check_page;
 829                 }
 830
 831                 skb = __netdev_alloc_skb_ip_align(netdev, bufsz, gfp);
 832                 if (unlikely(!skb)) {
 833                         /* Better luck next round */
 834                         adapter->alloc_rx_buff_failed++;
 835                         break;
 836                 }
 837
 838                 buffer_info->skb = skb;
 839 check_page:
 840                 /* allocate a new page if necessary */
 841                 if (!buffer_info->page) {
 842                         buffer_info->page = alloc_page(gfp);
 843                         if (unlikely(!buffer_info->page)) {
 844                                 adapter->alloc_rx_buff_failed++;
 845                                 break;
 846                         }
 847                 }
 848
 849                 if (!buffer_info->dma) {
 850                         buffer_info->dma = dma_map_page(&pdev->dev,
 851                                                         buffer_info->page, 0,
 852                                                         PAGE_SIZE,
 853                                                         DMA_FROM_DEVICE);
 854                         if (dma_mapping_error(&pdev->dev, buffer_info->dma)) {
 855                                 adapter->alloc_rx_buff_failed++;
 856                                 break;
 857                         }
 858                 }
 859
 860                 rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 861                 rx_desc->read.buffer_addr = cpu_to_le64(buffer_info->dma);
 862
 863                 if (unlikely(++i == rx_ring->count))
 864                         i = 0;
 865                 buffer_info = &rx_ring->buffer_info[i];
 866         }
 867
 868         if (likely(rx_ring->next_to_use != i)) {
 869                 rx_ring->next_to_use = i;
 870                 if (unlikely(i-- == 0))
 871                         i = (rx_ring->count - 1);
 872
 873                 /* Force memory writes to complete before letting h/w
 874                  * know there are new descriptors to fetch.  (Only
 875                  * applicable for weak-ordered memory model archs,
 876                  * such as IA-64).
 877                  */
 878                 wmb();
 879                 if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
 880                         e1000e_update_rdt_wa(rx_ring, i);
 881                 else
 882                         writel(i, rx_ring->tail);
 883         }
 884 }
 885
 886 static inline void e1000_rx_hash(struct net_device *netdev, __le32 rss,
 887                                  struct sk_buff *skb)
 888 {
 889         if (netdev->features & NETIF_F_RXHASH)
 890                 skb->rxhash = le32_to_cpu(rss);
 891 }
 892
 893 /**
 894  * e1000_clean_rx_irq - Send received data up the network stack
 895  * @rx_ring: Rx descriptor ring
 896  *
 897  * the return value indicates whether actual cleaning was done, there
 898  * is no guarantee that everything was cleaned
 899  **/
 900 static bool e1000_clean_rx_irq(struct e1000_ring *rx_ring, int *work_done,
 901                                int work_to_do)
 902 {
 903         struct e1000_adapter *adapter = rx_ring->adapter;
 904         struct net_device *netdev = adapter->netdev;
 905         struct pci_dev *pdev = adapter->pdev;
 906         struct e1000_hw *hw = &adapter->hw;
 907         union e1000_rx_desc_extended *rx_desc, *next_rxd;
 908         struct e1000_buffer *buffer_info, *next_buffer;
 909         u32 length, staterr;
 910         unsigned int i;
 911         int cleaned_count = 0;
 912         bool cleaned = false;
 913         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 914
 915         i = rx_ring->next_to_clean;
 916         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
 917         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 918         buffer_info = &rx_ring->buffer_info[i];
 919
 920         while (staterr & E1000_RXD_STAT_DD) {
 921                 struct sk_buff *skb;
 922
 923                 if (*work_done >= work_to_do)
 924                         break;
 925                 (*work_done)++;
 926                 rmb();  /* read descriptor and rx_buffer_info after status DD */
 927
 928                 skb = buffer_info->skb;
 929                 buffer_info->skb = NULL;
 930
 931                 prefetch(skb->data - NET_IP_ALIGN);
 932
 933                 i++;
 934                 if (i == rx_ring->count)
 935                         i = 0;
 936                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
 937                 prefetch(next_rxd);
 938
 939                 next_buffer = &rx_ring->buffer_info[i];
 940
 941                 cleaned = true;
 942                 cleaned_count++;
 943                 dma_unmap_single(&pdev->dev, buffer_info->dma,
 944                                  adapter->rx_buffer_len, DMA_FROM_DEVICE);
 945                 buffer_info->dma = 0;
 946
 947                 length = le16_to_cpu(rx_desc->wb.upper.length);
 948
 949                 /* !EOP means multiple descriptors were used to store a single
 950                  * packet, if that's the case we need to toss it.  In fact, we
 951                  * need to toss every packet with the EOP bit clear and the
 952                  * next frame that _does_ have the EOP bit set, as it is by
 953                  * definition only a frame fragment
 954                  */
 955                 if (unlikely(!(staterr & E1000_RXD_STAT_EOP)))
 956                         adapter->flags2 |= FLAG2_IS_DISCARDING;
 957
 958                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
 959                         /* All receives must fit into a single buffer */
 960                         e_dbg("Receive packet consumed multiple buffers\n");
 961                         /* recycle */
 962                         buffer_info->skb = skb;
 963                         if (staterr & E1000_RXD_STAT_EOP)
 964                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
 965                         goto next_desc;
 966                 }
 967
 968                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
 969                              !(netdev->features & NETIF_F_RXALL))) {
 970                         /* recycle */
 971                         buffer_info->skb = skb;
 972                         goto next_desc;
 973                 }
 974
 975                 /* adjust length to remove Ethernet CRC */
 976                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
 977                         /* If configured to store CRC, don't subtract FCS,
 978                          * but keep the FCS bytes out of the total_rx_bytes
 979                          * counter
 980                          */
 981                         if (netdev->features & NETIF_F_RXFCS)
 982                                 total_rx_bytes -= 4;
 983                         else
 984                                 length -= 4;
 985                 }
 986
 987                 total_rx_bytes += length;
 988                 total_rx_packets++;
 989
 990                 /* code added for copybreak, this should improve
 991                  * performance for small packets with large amounts
 992                  * of reassembly being done in the stack
 993                  */
 994                 if (length < copybreak) {
 995                         struct sk_buff *new_skb =
 996                             netdev_alloc_skb_ip_align(netdev, length);
 997                         if (new_skb) {
 998                                 skb_copy_to_linear_data_offset(new_skb,
 999                                                                -NET_IP_ALIGN,
1000                                                                (skb->data -
1001                                                                 NET_IP_ALIGN),
1002                                                                (length +
1003                                                                 NET_IP_ALIGN));
1004                                 /* save the skb in buffer_info as good */
1005                                 buffer_info->skb = skb;
1006                                 skb = new_skb;
1007                         }
1008                         /* else just continue with the old one */
1009                 }
1010                 /* end copybreak code */
1011                 skb_put(skb, length);
1012
1013                 /* Receive Checksum Offload */
1014                 e1000_rx_checksum(adapter, staterr, skb);
1015
1016                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1017
1018                 e1000_receive_skb(adapter, netdev, skb, staterr,
1019                                   rx_desc->wb.upper.vlan);
1020
1021 next_desc:
1022                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1023
1024                 /* return some buffers to hardware, one at a time is too slow */
1025                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1026                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1027                                               GFP_ATOMIC);
1028                         cleaned_count = 0;
1029                 }
1030
1031                 /* use prefetched values */
1032                 rx_desc = next_rxd;
1033                 buffer_info = next_buffer;
1034
1035                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1036         }
1037         rx_ring->next_to_clean = i;
1038
1039         cleaned_count = e1000_desc_unused(rx_ring);
1040         if (cleaned_count)
1041                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1042
1043         adapter->total_rx_bytes += total_rx_bytes;
1044         adapter->total_rx_packets += total_rx_packets;
1045         return cleaned;
1046 }
1047
1048 static void e1000_put_txbuf(struct e1000_ring *tx_ring,
1049                             struct e1000_buffer *buffer_info)
1050 {
1051         struct e1000_adapter *adapter = tx_ring->adapter;
1052
1053         if (buffer_info->dma) {
1054                 if (buffer_info->mapped_as_page)
1055                         dma_unmap_page(&adapter->pdev->dev, buffer_info->dma,
1056                                        buffer_info->length, DMA_TO_DEVICE);
1057                 else
1058                         dma_unmap_single(&adapter->pdev->dev, buffer_info->dma,
1059                                          buffer_info->length, DMA_TO_DEVICE);
1060                 buffer_info->dma = 0;
1061         }
1062         if (buffer_info->skb) {
1063                 dev_kfree_skb_any(buffer_info->skb);
1064                 buffer_info->skb = NULL;
1065         }
1066         buffer_info->time_stamp = 0;
1067 }
1068
1069 static void e1000_print_hw_hang(struct work_struct *work)
1070 {
1071         struct e1000_adapter *adapter = container_of(work,
1072                                                      struct e1000_adapter,
1073                                                      print_hang_task);
1074         struct net_device *netdev = adapter->netdev;
1075         struct e1000_ring *tx_ring = adapter->tx_ring;
1076         unsigned int i = tx_ring->next_to_clean;
1077         unsigned int eop = tx_ring->buffer_info[i].next_to_watch;
1078         struct e1000_tx_desc *eop_desc = E1000_TX_DESC(*tx_ring, eop);
1079         struct e1000_hw *hw = &adapter->hw;
1080         u16 phy_status, phy_1000t_status, phy_ext_status;
1081         u16 pci_status;
1082
1083         if (test_bit(__E1000_DOWN, &adapter->state))
1084                 return;
1085
1086         if (!adapter->tx_hang_recheck && (adapter->flags2 & FLAG2_DMA_BURST)) {
1087                 /* May be block on write-back, flush and detect again
1088                  * flush pending descriptor writebacks to memory
1089                  */
1090                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1091                 /* execute the writes immediately */
1092                 e1e_flush();
1093                 /* Due to rare timing issues, write to TIDV again to ensure
1094                  * the write is successful
1095                  */
1096                 ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
1097                 /* execute the writes immediately */
1098                 e1e_flush();
1099                 adapter->tx_hang_recheck = true;
1100                 return;
1101         }
1102         /* Real hang detected */
1103         adapter->tx_hang_recheck = false;
1104         netif_stop_queue(netdev);
1105
1106         e1e_rphy(hw, MII_BMSR, &phy_status);
1107         e1e_rphy(hw, MII_STAT1000, &phy_1000t_status);
1108         e1e_rphy(hw, MII_ESTATUS, &phy_ext_status);
1109
1110         pci_read_config_word(adapter->pdev, PCI_STATUS, &pci_status);
1111
1112         /* detected Hardware unit hang */
1113         e_err("Detected Hardware Unit Hang:\n"
1114               "  TDH                  <%x>\n"
1115               "  TDT                  <%x>\n"
1116               "  next_to_use          <%x>\n"
1117               "  next_to_clean        <%x>\n"
1118               "buffer_info[next_to_clean]:\n"
1119               "  time_stamp           <%lx>\n"
1120               "  next_to_watch        <%x>\n"
1121               "  jiffies              <%lx>\n"
1122               "  next_to_watch.status <%x>\n"
1123               "MAC Status             <%x>\n"
1124               "PHY Status             <%x>\n"
1125               "PHY 1000BASE-T Status  <%x>\n"
1126               "PHY Extended Status    <%x>\n"
1127               "PCI Status             <%x>\n",
1128               readl(tx_ring->head), readl(tx_ring->tail), tx_ring->next_to_use,
1129               tx_ring->next_to_clean, tx_ring->buffer_info[eop].time_stamp,
1130               eop, jiffies, eop_desc->upper.fields.status, er32(STATUS),
1131               phy_status, phy_1000t_status, phy_ext_status, pci_status);
1132
1133         /* Suggest workaround for known h/w issue */
1134         if ((hw->mac.type == e1000_pchlan) && (er32(CTRL) & E1000_CTRL_TFCE))
1135                 e_err("Try turning off Tx pause (flow control) via ethtool\n");
1136 }
1137
1138 /**
1139  * e1000e_tx_hwtstamp_work - check for Tx time stamp
1140  * @work: pointer to work struct
1141  *
1142  * This work function polls the TSYNCTXCTL valid bit to determine when a
1143  * timestamp has been taken for the current stored skb.  The timestamp must
1144  * be for this skb because only one such packet is allowed in the queue.
1145  */
1146 static void e1000e_tx_hwtstamp_work(struct work_struct *work)
1147 {
1148         struct e1000_adapter *adapter = container_of(work, struct e1000_adapter,
1149                                                      tx_hwtstamp_work);
1150         struct e1000_hw *hw = &adapter->hw;
1151
1152         if (!adapter->tx_hwtstamp_skb)
1153                 return;
1154
1155         if (er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_VALID) {
1156                 struct skb_shared_hwtstamps shhwtstamps;
1157                 u64 txstmp;
1158
1159                 txstmp = er32(TXSTMPL);
1160                 txstmp |= (u64)er32(TXSTMPH) << 32;
1161
1162                 e1000e_systim_to_hwtstamp(adapter, &shhwtstamps, txstmp);
1163
1164                 skb_tstamp_tx(adapter->tx_hwtstamp_skb, &shhwtstamps);
1165                 dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
1166                 adapter->tx_hwtstamp_skb = NULL;
1167         } else {
1168                 /* reschedule to check later */
1169                 schedule_work(&adapter->tx_hwtstamp_work);
1170         }
1171 }
1172
1173 /**
1174  * e1000_clean_tx_irq - Reclaim resources after transmit completes
1175  * @tx_ring: Tx descriptor ring
1176  *
1177  * the return value indicates whether actual cleaning was done, there
1178  * is no guarantee that everything was cleaned
1179  **/
1180 static bool e1000_clean_tx_irq(struct e1000_ring *tx_ring)
1181 {
1182         struct e1000_adapter *adapter = tx_ring->adapter;
1183         struct net_device *netdev = adapter->netdev;
1184         struct e1000_hw *hw = &adapter->hw;
1185         struct e1000_tx_desc *tx_desc, *eop_desc;
1186         struct e1000_buffer *buffer_info;
1187         unsigned int i, eop;
1188         unsigned int count = 0;
1189         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
1190         unsigned int bytes_compl = 0, pkts_compl = 0;
1191
1192         i = tx_ring->next_to_clean;
1193         eop = tx_ring->buffer_info[i].next_to_watch;
1194         eop_desc = E1000_TX_DESC(*tx_ring, eop);
1195
1196         while ((eop_desc->upper.data & cpu_to_le32(E1000_TXD_STAT_DD)) &&
1197                (count < tx_ring->count)) {
1198                 bool cleaned = false;
1199                 rmb();          /* read buffer_info after eop_desc */
1200                 for (; !cleaned; count++) {
1201                         tx_desc = E1000_TX_DESC(*tx_ring, i);
1202                         buffer_info = &tx_ring->buffer_info[i];
1203                         cleaned = (i == eop);
1204
1205                         if (cleaned) {
1206                                 total_tx_packets += buffer_info->segs;
1207                                 total_tx_bytes += buffer_info->bytecount;
1208                                 if (buffer_info->skb) {
1209                                         bytes_compl += buffer_info->skb->len;
1210                                         pkts_compl++;
1211                                 }
1212                         }
1213
1214                         e1000_put_txbuf(tx_ring, buffer_info);
1215                         tx_desc->upper.data = 0;
1216
1217                         i++;
1218                         if (i == tx_ring->count)
1219                                 i = 0;
1220                 }
1221
1222                 if (i == tx_ring->next_to_use)
1223                         break;
1224                 eop = tx_ring->buffer_info[i].next_to_watch;
1225                 eop_desc = E1000_TX_DESC(*tx_ring, eop);
1226         }
1227
1228         tx_ring->next_to_clean = i;
1229
1230         netdev_completed_queue(netdev, pkts_compl, bytes_compl);
1231
1232 #define TX_WAKE_THRESHOLD 32
1233         if (count && netif_carrier_ok(netdev) &&
1234             e1000_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD) {
1235                 /* Make sure that anybody stopping the queue after this
1236                  * sees the new next_to_clean.
1237                  */
1238                 smp_mb();
1239
1240                 if (netif_queue_stopped(netdev) &&
1241                     !(test_bit(__E1000_DOWN, &adapter->state))) {
1242                         netif_wake_queue(netdev);
1243                         ++adapter->restart_queue;
1244                 }
1245         }
1246
1247         if (adapter->detect_tx_hung) {
1248                 /* Detect a transmit hang in hardware, this serializes the
1249                  * check with the clearing of time_stamp and movement of i
1250                  */
1251                 adapter->detect_tx_hung = false;
1252                 if (tx_ring->buffer_info[i].time_stamp &&
1253                     time_after(jiffies, tx_ring->buffer_info[i].time_stamp
1254                                + (adapter->tx_timeout_factor * HZ)) &&
1255                     !(er32(STATUS) & E1000_STATUS_TXOFF))
1256                         schedule_work(&adapter->print_hang_task);
1257                 else
1258                         adapter->tx_hang_recheck = false;
1259         }
1260         adapter->total_tx_bytes += total_tx_bytes;
1261         adapter->total_tx_packets += total_tx_packets;
1262         return count < tx_ring->count;
1263 }
1264
1265 /**
1266  * e1000_clean_rx_irq_ps - Send received data up the network stack; packet split
1267  * @rx_ring: Rx descriptor ring
1268  *
1269  * the return value indicates whether actual cleaning was done, there
1270  * is no guarantee that everything was cleaned
1271  **/
1272 static bool e1000_clean_rx_irq_ps(struct e1000_ring *rx_ring, int *work_done,
1273                                   int work_to_do)
1274 {
1275         struct e1000_adapter *adapter = rx_ring->adapter;
1276         struct e1000_hw *hw = &adapter->hw;
1277         union e1000_rx_desc_packet_split *rx_desc, *next_rxd;
1278         struct net_device *netdev = adapter->netdev;
1279         struct pci_dev *pdev = adapter->pdev;
1280         struct e1000_buffer *buffer_info, *next_buffer;
1281         struct e1000_ps_page *ps_page;
1282         struct sk_buff *skb;
1283         unsigned int i, j;
1284         u32 length, staterr;
1285         int cleaned_count = 0;
1286         bool cleaned = false;
1287         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1288
1289         i = rx_ring->next_to_clean;
1290         rx_desc = E1000_RX_DESC_PS(*rx_ring, i);
1291         staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1292         buffer_info = &rx_ring->buffer_info[i];
1293
1294         while (staterr & E1000_RXD_STAT_DD) {
1295                 if (*work_done >= work_to_do)
1296                         break;
1297                 (*work_done)++;
1298                 skb = buffer_info->skb;
1299                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1300
1301                 /* in the packet split case this is header only */
1302                 prefetch(skb->data - NET_IP_ALIGN);
1303
1304                 i++;
1305                 if (i == rx_ring->count)
1306                         i = 0;
1307                 next_rxd = E1000_RX_DESC_PS(*rx_ring, i);
1308                 prefetch(next_rxd);
1309
1310                 next_buffer = &rx_ring->buffer_info[i];
1311
1312                 cleaned = true;
1313                 cleaned_count++;
1314                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1315                                  adapter->rx_ps_bsize0, DMA_FROM_DEVICE);
1316                 buffer_info->dma = 0;
1317
1318                 /* see !EOP comment in other Rx routine */
1319                 if (!(staterr & E1000_RXD_STAT_EOP))
1320                         adapter->flags2 |= FLAG2_IS_DISCARDING;
1321
1322                 if (adapter->flags2 & FLAG2_IS_DISCARDING) {
1323                         e_dbg("Packet Split buffers didn't pick up the full packet\n");
1324                         dev_kfree_skb_irq(skb);
1325                         if (staterr & E1000_RXD_STAT_EOP)
1326                                 adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1327                         goto next_desc;
1328                 }
1329
1330                 if (unlikely((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1331                              !(netdev->features & NETIF_F_RXALL))) {
1332                         dev_kfree_skb_irq(skb);
1333                         goto next_desc;
1334                 }
1335
1336                 length = le16_to_cpu(rx_desc->wb.middle.length0);
1337
1338                 if (!length) {
1339                         e_dbg("Last part of the packet spanning multiple descriptors\n");
1340                         dev_kfree_skb_irq(skb);
1341                         goto next_desc;
1342                 }
1343
1344                 /* Good Receive */
1345                 skb_put(skb, length);
1346
1347                 {
1348                         /* this looks ugly, but it seems compiler issues make
1349                          * it more efficient than reusing j
1350                          */
1351                         int l1 = le16_to_cpu(rx_desc->wb.upper.length[0]);
1352
1353                         /* page alloc/put takes too long and effects small
1354                          * packet throughput, so unsplit small packets and
1355                          * save the alloc/put only valid in softirq (napi)
1356                          * context to call kmap_*
1357                          */
1358                         if (l1 && (l1 <= copybreak) &&
1359                             ((length + l1) <= adapter->rx_ps_bsize0)) {
1360                                 u8 *vaddr;
1361
1362                                 ps_page = &buffer_info->ps_pages[0];
1363
1364                                 /* there is no documentation about how to call
1365                                  * kmap_atomic, so we can't hold the mapping
1366                                  * very long
1367                                  */
1368                                 dma_sync_single_for_cpu(&pdev->dev,
1369                                                         ps_page->dma,
1370                                                         PAGE_SIZE,
1371                                                         DMA_FROM_DEVICE);
1372                                 vaddr = kmap_atomic(ps_page->page);
1373                                 memcpy(skb_tail_pointer(skb), vaddr, l1);
1374                                 kunmap_atomic(vaddr);
1375                                 dma_sync_single_for_device(&pdev->dev,
1376                                                            ps_page->dma,
1377                                                            PAGE_SIZE,
1378                                                            DMA_FROM_DEVICE);
1379
1380                                 /* remove the CRC */
1381                                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1382                                         if (!(netdev->features & NETIF_F_RXFCS))
1383                                                 l1 -= 4;
1384                                 }
1385
1386                                 skb_put(skb, l1);
1387                                 goto copydone;
1388                         }       /* if */
1389                 }
1390
1391                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1392                         length = le16_to_cpu(rx_desc->wb.upper.length[j]);
1393                         if (!length)
1394                                 break;
1395
1396                         ps_page = &buffer_info->ps_pages[j];
1397                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1398                                        DMA_FROM_DEVICE);
1399                         ps_page->dma = 0;
1400                         skb_fill_page_desc(skb, j, ps_page->page, 0, length);
1401                         ps_page->page = NULL;
1402                         skb->len += length;
1403                         skb->data_len += length;
1404                         skb->truesize += PAGE_SIZE;
1405                 }
1406
1407                 /* strip the ethernet crc, problem is we're using pages now so
1408                  * this whole operation can get a little cpu intensive
1409                  */
1410                 if (!(adapter->flags2 & FLAG2_CRC_STRIPPING)) {
1411                         if (!(netdev->features & NETIF_F_RXFCS))
1412                                 pskb_trim(skb, skb->len - 4);
1413                 }
1414
1415 copydone:
1416                 total_rx_bytes += skb->len;
1417                 total_rx_packets++;
1418
1419                 e1000_rx_checksum(adapter, staterr, skb);
1420
1421                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1422
1423                 if (rx_desc->wb.upper.header_status &
1424                     cpu_to_le16(E1000_RXDPS_HDRSTAT_HDRSP))
1425                         adapter->rx_hdr_split++;
1426
1427                 e1000_receive_skb(adapter, netdev, skb, staterr,
1428                                   rx_desc->wb.middle.vlan);
1429
1430 next_desc:
1431                 rx_desc->wb.middle.status_error &= cpu_to_le32(~0xFF);
1432                 buffer_info->skb = NULL;
1433
1434                 /* return some buffers to hardware, one at a time is too slow */
1435                 if (cleaned_count >= E1000_RX_BUFFER_WRITE) {
1436                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1437                                               GFP_ATOMIC);
1438                         cleaned_count = 0;
1439                 }
1440
1441                 /* use prefetched values */
1442                 rx_desc = next_rxd;
1443                 buffer_info = next_buffer;
1444
1445                 staterr = le32_to_cpu(rx_desc->wb.middle.status_error);
1446         }
1447         rx_ring->next_to_clean = i;
1448
1449         cleaned_count = e1000_desc_unused(rx_ring);
1450         if (cleaned_count)
1451                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1452
1453         adapter->total_rx_bytes += total_rx_bytes;
1454         adapter->total_rx_packets += total_rx_packets;
1455         return cleaned;
1456 }
1457
1458 /**
1459  * e1000_consume_page - helper function
1460  **/
1461 static void e1000_consume_page(struct e1000_buffer *bi, struct sk_buff *skb,
1462                                u16 length)
1463 {
1464         bi->page = NULL;
1465         skb->len += length;
1466         skb->data_len += length;
1467         skb->truesize += PAGE_SIZE;
1468 }
1469
1470 /**
1471  * e1000_clean_jumbo_rx_irq - Send received data up the network stack; legacy
1472  * @adapter: board private structure
1473  *
1474  * the return value indicates whether actual cleaning was done, there
1475  * is no guarantee that everything was cleaned
1476  **/
1477 static bool e1000_clean_jumbo_rx_irq(struct e1000_ring *rx_ring, int *work_done,
1478                                      int work_to_do)
1479 {
1480         struct e1000_adapter *adapter = rx_ring->adapter;
1481         struct net_device *netdev = adapter->netdev;
1482         struct pci_dev *pdev = adapter->pdev;
1483         union e1000_rx_desc_extended *rx_desc, *next_rxd;
1484         struct e1000_buffer *buffer_info, *next_buffer;
1485         u32 length, staterr;
1486         unsigned int i;
1487         int cleaned_count = 0;
1488         bool cleaned = false;
1489         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1490         struct skb_shared_info *shinfo;
1491
1492         i = rx_ring->next_to_clean;
1493         rx_desc = E1000_RX_DESC_EXT(*rx_ring, i);
1494         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1495         buffer_info = &rx_ring->buffer_info[i];
1496
1497         while (staterr & E1000_RXD_STAT_DD) {
1498                 struct sk_buff *skb;
1499
1500                 if (*work_done >= work_to_do)
1501                         break;
1502                 (*work_done)++;
1503                 rmb();  /* read descriptor and rx_buffer_info after status DD */
1504
1505                 skb = buffer_info->skb;
1506                 buffer_info->skb = NULL;
1507
1508                 ++i;
1509                 if (i == rx_ring->count)
1510                         i = 0;
1511                 next_rxd = E1000_RX_DESC_EXT(*rx_ring, i);
1512                 prefetch(next_rxd);
1513
1514                 next_buffer = &rx_ring->buffer_info[i];
1515
1516                 cleaned = true;
1517                 cleaned_count++;
1518                 dma_unmap_page(&pdev->dev, buffer_info->dma, PAGE_SIZE,
1519                                DMA_FROM_DEVICE);
1520                 buffer_info->dma = 0;
1521
1522                 length = le16_to_cpu(rx_desc->wb.upper.length);
1523
1524                 /* errors is only valid for DD + EOP descriptors */
1525                 if (unlikely((staterr & E1000_RXD_STAT_EOP) &&
1526                              ((staterr & E1000_RXDEXT_ERR_FRAME_ERR_MASK) &&
1527                               !(netdev->features & NETIF_F_RXALL)))) {
1528                         /* recycle both page and skb */
1529                         buffer_info->skb = skb;
1530                         /* an error means any chain goes out the window too */
1531                         if (rx_ring->rx_skb_top)
1532                                 dev_kfree_skb_irq(rx_ring->rx_skb_top);
1533                         rx_ring->rx_skb_top = NULL;
1534                         goto next_desc;
1535                 }
1536 #define rxtop (rx_ring->rx_skb_top)
1537                 if (!(staterr & E1000_RXD_STAT_EOP)) {
1538                         /* this descriptor is only the beginning (or middle) */
1539                         if (!rxtop) {
1540                                 /* this is the beginning of a chain */
1541                                 rxtop = skb;
1542                                 skb_fill_page_desc(rxtop, 0, buffer_info->page,
1543                                                    0, length);
1544                         } else {
1545                                 /* this is the middle of a chain */
1546                                 shinfo = skb_shinfo(rxtop);
1547                                 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1548                                                    buffer_info->page, 0,
1549                                                    length);
1550                                 /* re-use the skb, only consumed the page */
1551                                 buffer_info->skb = skb;
1552                         }
1553                         e1000_consume_page(buffer_info, rxtop, length);
1554                         goto next_desc;
1555                 } else {
1556                         if (rxtop) {
1557                                 /* end of the chain */
1558                                 shinfo = skb_shinfo(rxtop);
1559                                 skb_fill_page_desc(rxtop, shinfo->nr_frags,
1560                                                    buffer_info->page, 0,
1561                                                    length);
1562                                 /* re-use the current skb, we only consumed the
1563                                  * page
1564                                  */
1565                                 buffer_info->skb = skb;
1566                                 skb = rxtop;
1567                                 rxtop = NULL;
1568                                 e1000_consume_page(buffer_info, skb, length);
1569                         } else {
1570                                 /* no chain, got EOP, this buf is the packet
1571                                  * copybreak to save the put_page/alloc_page
1572                                  */
1573                                 if (length <= copybreak &&
1574                                     skb_tailroom(skb) >= length) {
1575                                         u8 *vaddr;
1576                                         vaddr = kmap_atomic(buffer_info->page);
1577                                         memcpy(skb_tail_pointer(skb), vaddr,
1578                                                length);
1579                                         kunmap_atomic(vaddr);
1580                                         /* re-use the page, so don't erase
1581                                          * buffer_info->page
1582                                          */
1583                                         skb_put(skb, length);
1584                                 } else {
1585                                         skb_fill_page_desc(skb, 0,
1586                                                            buffer_info->page, 0,
1587                                                            length);
1588                                         e1000_consume_page(buffer_info, skb,
1589                                                            length);
1590                                 }
1591                         }
1592                 }
1593
1594                 /* Receive Checksum Offload */
1595                 e1000_rx_checksum(adapter, staterr, skb);
1596
1597                 e1000_rx_hash(netdev, rx_desc->wb.lower.hi_dword.rss, skb);
1598
1599                 /* probably a little skewed due to removing CRC */
1600                 total_rx_bytes += skb->len;
1601                 total_rx_packets++;
1602
1603                 /* eth type trans needs skb->data to point to something */
1604                 if (!pskb_may_pull(skb, ETH_HLEN)) {
1605                         e_err("pskb_may_pull failed.\n");
1606                         dev_kfree_skb_irq(skb);
1607                         goto next_desc;
1608                 }
1609
1610                 e1000_receive_skb(adapter, netdev, skb, staterr,
1611                                   rx_desc->wb.upper.vlan);
1612
1613 next_desc:
1614                 rx_desc->wb.upper.status_error &= cpu_to_le32(~0xFF);
1615
1616                 /* return some buffers to hardware, one at a time is too slow */
1617                 if (unlikely(cleaned_count >= E1000_RX_BUFFER_WRITE)) {
1618                         adapter->alloc_rx_buf(rx_ring, cleaned_count,
1619                                               GFP_ATOMIC);
1620                         cleaned_count = 0;
1621                 }
1622
1623                 /* use prefetched values */
1624                 rx_desc = next_rxd;
1625                 buffer_info = next_buffer;
1626
1627                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1628         }
1629         rx_ring->next_to_clean = i;
1630
1631         cleaned_count = e1000_desc_unused(rx_ring);
1632         if (cleaned_count)
1633                 adapter->alloc_rx_buf(rx_ring, cleaned_count, GFP_ATOMIC);
1634
1635         adapter->total_rx_bytes += total_rx_bytes;
1636         adapter->total_rx_packets += total_rx_packets;
1637         return cleaned;
1638 }
1639
1640 /**
1641  * e1000_clean_rx_ring - Free Rx Buffers per Queue
1642  * @rx_ring: Rx descriptor ring
1643  **/
1644 static void e1000_clean_rx_ring(struct e1000_ring *rx_ring)
1645 {
1646         struct e1000_adapter *adapter = rx_ring->adapter;
1647         struct e1000_buffer *buffer_info;
1648         struct e1000_ps_page *ps_page;
1649         struct pci_dev *pdev = adapter->pdev;
1650         unsigned int i, j;
1651
1652         /* Free all the Rx ring sk_buffs */
1653         for (i = 0; i < rx_ring->count; i++) {
1654                 buffer_info = &rx_ring->buffer_info[i];
1655                 if (buffer_info->dma) {
1656                         if (adapter->clean_rx == e1000_clean_rx_irq)
1657                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1658                                                  adapter->rx_buffer_len,
1659                                                  DMA_FROM_DEVICE);
1660                         else if (adapter->clean_rx == e1000_clean_jumbo_rx_irq)
1661                                 dma_unmap_page(&pdev->dev, buffer_info->dma,
1662                                                PAGE_SIZE, DMA_FROM_DEVICE);
1663                         else if (adapter->clean_rx == e1000_clean_rx_irq_ps)
1664                                 dma_unmap_single(&pdev->dev, buffer_info->dma,
1665                                                  adapter->rx_ps_bsize0,
1666                                                  DMA_FROM_DEVICE);
1667                         buffer_info->dma = 0;
1668                 }
1669
1670                 if (buffer_info->page) {
1671                         put_page(buffer_info->page);
1672                         buffer_info->page = NULL;
1673                 }
1674
1675                 if (buffer_info->skb) {
1676                         dev_kfree_skb(buffer_info->skb);
1677                         buffer_info->skb = NULL;
1678                 }
1679
1680                 for (j = 0; j < PS_PAGE_BUFFERS; j++) {
1681                         ps_page = &buffer_info->ps_pages[j];
1682                         if (!ps_page->page)
1683                                 break;
1684                         dma_unmap_page(&pdev->dev, ps_page->dma, PAGE_SIZE,
1685                                        DMA_FROM_DEVICE);
1686                         ps_page->dma = 0;
1687                         put_page(ps_page->page);
1688                         ps_page->page = NULL;
1689                 }
1690         }
1691
1692         /* there also may be some cached data from a chained receive */
1693         if (rx_ring->rx_skb_top) {
1694                 dev_kfree_skb(rx_ring->rx_skb_top);
1695                 rx_ring->rx_skb_top = NULL;
1696         }
1697
1698         /* Zero out the descriptor ring */
1699         memset(rx_ring->desc, 0, rx_ring->size);
1700
1701         rx_ring->next_to_clean = 0;
1702         rx_ring->next_to_use = 0;
1703         adapter->flags2 &= ~FLAG2_IS_DISCARDING;
1704
1705         writel(0, rx_ring->head);
1706         if (rx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
1707                 e1000e_update_rdt_wa(rx_ring, 0);
1708         else
1709                 writel(0, rx_ring->tail);
1710 }
1711
1712 static void e1000e_downshift_workaround(struct work_struct *work)
1713 {
1714         struct e1000_adapter *adapter = container_of(work,
1715                                                      struct e1000_adapter,
1716                                                      downshift_task);
1717
1718         if (test_bit(__E1000_DOWN, &adapter->state))
1719                 return;
1720
1721         e1000e_gig_downshift_workaround_ich8lan(&adapter->hw);
1722 }
1723
1724 /**
1725  * e1000_intr_msi - Interrupt Handler
1726  * @irq: interrupt number
1727  * @data: pointer to a network interface device structure
1728  **/
1729 static irqreturn_t e1000_intr_msi(int __always_unused irq, void *data)
1730 {
1731         struct net_device *netdev = data;
1732         struct e1000_adapter *adapter = netdev_priv(netdev);
1733         struct e1000_hw *hw = &adapter->hw;
1734         u32 icr = er32(ICR);
1735
1736         /* read ICR disables interrupts using IAM */
1737         if (icr & E1000_ICR_LSC) {
1738                 hw->mac.get_link_status = true;
1739                 /* ICH8 workaround-- Call gig speed drop workaround on cable
1740                  * disconnect (LSC) before accessing any PHY registers
1741                  */
1742                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1743                     (!(er32(STATUS) & E1000_STATUS_LU)))
1744                         schedule_work(&adapter->downshift_task);
1745
1746                 /* 80003ES2LAN workaround-- For packet buffer work-around on
1747                  * link down event; disable receives here in the ISR and reset
1748                  * adapter in watchdog
1749                  */
1750                 if (netif_carrier_ok(netdev) &&
1751                     adapter->flags & FLAG_RX_NEEDS_RESTART) {
1752                         /* disable receives */
1753                         u32 rctl = er32(RCTL);
1754                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1755                         adapter->flags |= FLAG_RESTART_NOW;
1756                 }
1757                 /* guard against interrupt when we're going down */
1758                 if (!test_bit(__E1000_DOWN, &adapter->state))
1759                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1760         }
1761
1762         /* Reset on uncorrectable ECC error */
1763         if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1764                 u32 pbeccsts = er32(PBECCSTS);
1765
1766                 adapter->corr_errors +=
1767                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1768                 adapter->uncorr_errors +=
1769                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1770                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1771
1772                 /* Do the reset outside of interrupt context */
1773                 schedule_work(&adapter->reset_task);
1774
1775                 /* return immediately since reset is imminent */
1776                 return IRQ_HANDLED;
1777         }
1778
1779         if (napi_schedule_prep(&adapter->napi)) {
1780                 adapter->total_tx_bytes = 0;
1781                 adapter->total_tx_packets = 0;
1782                 adapter->total_rx_bytes = 0;
1783                 adapter->total_rx_packets = 0;
1784                 __napi_schedule(&adapter->napi);
1785         }
1786
1787         return IRQ_HANDLED;
1788 }
1789
1790 /**
1791  * e1000_intr - Interrupt Handler
1792  * @irq: interrupt number
1793  * @data: pointer to a network interface device structure
1794  **/
1795 static irqreturn_t e1000_intr(int __always_unused irq, void *data)
1796 {
1797         struct net_device *netdev = data;
1798         struct e1000_adapter *adapter = netdev_priv(netdev);
1799         struct e1000_hw *hw = &adapter->hw;
1800         u32 rctl, icr = er32(ICR);
1801
1802         if (!icr || test_bit(__E1000_DOWN, &adapter->state))
1803                 return IRQ_NONE;        /* Not our interrupt */
1804
1805         /* IMS will not auto-mask if INT_ASSERTED is not set, and if it is
1806          * not set, then the adapter didn't send an interrupt
1807          */
1808         if (!(icr & E1000_ICR_INT_ASSERTED))
1809                 return IRQ_NONE;
1810
1811         /* Interrupt Auto-Mask...upon reading ICR,
1812          * interrupts are masked.  No need for the
1813          * IMC write
1814          */
1815
1816         if (icr & E1000_ICR_LSC) {
1817                 hw->mac.get_link_status = true;
1818                 /* ICH8 workaround-- Call gig speed drop workaround on cable
1819                  * disconnect (LSC) before accessing any PHY registers
1820                  */
1821                 if ((adapter->flags & FLAG_LSC_GIG_SPEED_DROP) &&
1822                     (!(er32(STATUS) & E1000_STATUS_LU)))
1823                         schedule_work(&adapter->downshift_task);
1824
1825                 /* 80003ES2LAN workaround--
1826                  * For packet buffer work-around on link down event;
1827                  * disable receives here in the ISR and
1828                  * reset adapter in watchdog
1829                  */
1830                 if (netif_carrier_ok(netdev) &&
1831                     (adapter->flags & FLAG_RX_NEEDS_RESTART)) {
1832                         /* disable receives */
1833                         rctl = er32(RCTL);
1834                         ew32(RCTL, rctl & ~E1000_RCTL_EN);
1835                         adapter->flags |= FLAG_RESTART_NOW;
1836                 }
1837                 /* guard against interrupt when we're going down */
1838                 if (!test_bit(__E1000_DOWN, &adapter->state))
1839                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1840         }
1841
1842         /* Reset on uncorrectable ECC error */
1843         if ((icr & E1000_ICR_ECCER) && (hw->mac.type == e1000_pch_lpt)) {
1844                 u32 pbeccsts = er32(PBECCSTS);
1845
1846                 adapter->corr_errors +=
1847                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
1848                 adapter->uncorr_errors +=
1849                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
1850                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
1851
1852                 /* Do the reset outside of interrupt context */
1853                 schedule_work(&adapter->reset_task);
1854
1855                 /* return immediately since reset is imminent */
1856                 return IRQ_HANDLED;
1857         }
1858
1859         if (napi_schedule_prep(&adapter->napi)) {
1860                 adapter->total_tx_bytes = 0;
1861                 adapter->total_tx_packets = 0;
1862                 adapter->total_rx_bytes = 0;
1863                 adapter->total_rx_packets = 0;
1864                 __napi_schedule(&adapter->napi);
1865         }
1866
1867         return IRQ_HANDLED;
1868 }
1869
1870 static irqreturn_t e1000_msix_other(int __always_unused irq, void *data)
1871 {
1872         struct net_device *netdev = data;
1873         struct e1000_adapter *adapter = netdev_priv(netdev);
1874         struct e1000_hw *hw = &adapter->hw;
1875         u32 icr = er32(ICR);
1876
1877         if (!(icr & E1000_ICR_INT_ASSERTED)) {
1878                 if (!test_bit(__E1000_DOWN, &adapter->state))
1879                         ew32(IMS, E1000_IMS_OTHER);
1880                 return IRQ_NONE;
1881         }
1882
1883         if (icr & adapter->eiac_mask)
1884                 ew32(ICS, (icr & adapter->eiac_mask));
1885
1886         if (icr & E1000_ICR_OTHER) {
1887                 if (!(icr & E1000_ICR_LSC))
1888                         goto no_link_interrupt;
1889                 hw->mac.get_link_status = true;
1890                 /* guard against interrupt when we're going down */
1891                 if (!test_bit(__E1000_DOWN, &adapter->state))
1892                         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1893         }
1894
1895 no_link_interrupt:
1896         if (!test_bit(__E1000_DOWN, &adapter->state))
1897                 ew32(IMS, E1000_IMS_LSC | E1000_IMS_OTHER);
1898
1899         return IRQ_HANDLED;
1900 }
1901
1902 static irqreturn_t e1000_intr_msix_tx(int __always_unused irq, void *data)
1903 {
1904         struct net_device *netdev = data;
1905         struct e1000_adapter *adapter = netdev_priv(netdev);
1906         struct e1000_hw *hw = &adapter->hw;
1907         struct e1000_ring *tx_ring = adapter->tx_ring;
1908
1909         adapter->total_tx_bytes = 0;
1910         adapter->total_tx_packets = 0;
1911
1912         if (!e1000_clean_tx_irq(tx_ring))
1913                 /* Ring was not completely cleaned, so fire another interrupt */
1914                 ew32(ICS, tx_ring->ims_val);
1915
1916         return IRQ_HANDLED;
1917 }
1918
1919 static irqreturn_t e1000_intr_msix_rx(int __always_unused irq, void *data)
1920 {
1921         struct net_device *netdev = data;
1922         struct e1000_adapter *adapter = netdev_priv(netdev);
1923         struct e1000_ring *rx_ring = adapter->rx_ring;
1924
1925         /* Write the ITR value calculated at the end of the
1926          * previous interrupt.
1927          */
1928         if (rx_ring->set_itr) {
1929                 writel(1000000000 / (rx_ring->itr_val * 256),
1930                        rx_ring->itr_register);
1931                 rx_ring->set_itr = 0;
1932         }
1933
1934         if (napi_schedule_prep(&adapter->napi)) {
1935                 adapter->total_rx_bytes = 0;
1936                 adapter->total_rx_packets = 0;
1937                 __napi_schedule(&adapter->napi);
1938         }
1939         return IRQ_HANDLED;
1940 }
1941
1942 /**
1943  * e1000_configure_msix - Configure MSI-X hardware
1944  *
1945  * e1000_configure_msix sets up the hardware to properly
1946  * generate MSI-X interrupts.
1947  **/
1948 static void e1000_configure_msix(struct e1000_adapter *adapter)
1949 {
1950         struct e1000_hw *hw = &adapter->hw;
1951         struct e1000_ring *rx_ring = adapter->rx_ring;
1952         struct e1000_ring *tx_ring = adapter->tx_ring;
1953         int vector = 0;
1954         u32 ctrl_ext, ivar = 0;
1955
1956         adapter->eiac_mask = 0;
1957
1958         /* Workaround issue with spurious interrupts on 82574 in MSI-X mode */
1959         if (hw->mac.type == e1000_82574) {
1960                 u32 rfctl = er32(RFCTL);
1961                 rfctl |= E1000_RFCTL_ACK_DIS;
1962                 ew32(RFCTL, rfctl);
1963         }
1964
1965         /* Configure Rx vector */
1966         rx_ring->ims_val = E1000_IMS_RXQ0;
1967         adapter->eiac_mask |= rx_ring->ims_val;
1968         if (rx_ring->itr_val)
1969                 writel(1000000000 / (rx_ring->itr_val * 256),
1970                        rx_ring->itr_register);
1971         else
1972                 writel(1, rx_ring->itr_register);
1973         ivar = E1000_IVAR_INT_ALLOC_VALID | vector;
1974
1975         /* Configure Tx vector */
1976         tx_ring->ims_val = E1000_IMS_TXQ0;
1977         vector++;
1978         if (tx_ring->itr_val)
1979                 writel(1000000000 / (tx_ring->itr_val * 256),
1980                        tx_ring->itr_register);
1981         else
1982                 writel(1, tx_ring->itr_register);
1983         adapter->eiac_mask |= tx_ring->ims_val;
1984         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 8);
1985
1986         /* set vector for Other Causes, e.g. link changes */
1987         vector++;
1988         ivar |= ((E1000_IVAR_INT_ALLOC_VALID | vector) << 16);
1989         if (rx_ring->itr_val)
1990                 writel(1000000000 / (rx_ring->itr_val * 256),
1991                        hw->hw_addr + E1000_EITR_82574(vector));
1992         else
1993                 writel(1, hw->hw_addr + E1000_EITR_82574(vector));
1994
1995         /* Cause Tx interrupts on every write back */
1996         ivar |= (1 << 31);
1997
1998         ew32(IVAR, ivar);
1999
2000         /* enable MSI-X PBA support */
2001         ctrl_ext = er32(CTRL_EXT);
2002         ctrl_ext |= E1000_CTRL_EXT_PBA_CLR;
2003
2004         /* Auto-Mask Other interrupts upon ICR read */
2005         ew32(IAM, ~E1000_EIAC_MASK_82574 | E1000_IMS_OTHER);
2006         ctrl_ext |= E1000_CTRL_EXT_EIAME;
2007         ew32(CTRL_EXT, ctrl_ext);
2008         e1e_flush();
2009 }
2010
2011 void e1000e_reset_interrupt_capability(struct e1000_adapter *adapter)
2012 {
2013         if (adapter->msix_entries) {
2014                 pci_disable_msix(adapter->pdev);
2015                 kfree(adapter->msix_entries);
2016                 adapter->msix_entries = NULL;
2017         } else if (adapter->flags & FLAG_MSI_ENABLED) {
2018                 pci_disable_msi(adapter->pdev);
2019                 adapter->flags &= ~FLAG_MSI_ENABLED;
2020         }
2021 }
2022
2023 /**
2024  * e1000e_set_interrupt_capability - set MSI or MSI-X if supported
2025  *
2026  * Attempt to configure interrupts using the best available
2027  * capabilities of the hardware and kernel.
2028  **/
2029 void e1000e_set_interrupt_capability(struct e1000_adapter *adapter)
2030 {
2031         int err;
2032         int i;
2033
2034         switch (adapter->int_mode) {
2035         case E1000E_INT_MODE_MSIX:
2036                 if (adapter->flags & FLAG_HAS_MSIX) {
2037                         adapter->num_vectors = 3; /* RxQ0, TxQ0 and other */
2038                         adapter->msix_entries = kcalloc(adapter->num_vectors,
2039                                                         sizeof(struct
2040                                                                msix_entry),
2041                                                         GFP_KERNEL);
2042                         if (adapter->msix_entries) {
2043                                 for (i = 0; i < adapter->num_vectors; i++)
2044                                         adapter->msix_entries[i].entry = i;
2045
2046                                 err = pci_enable_msix(adapter->pdev,
2047                                                       adapter->msix_entries,
2048                                                       adapter->num_vectors);
2049                                 if (err == 0)
2050                                         return;
2051                         }
2052                         /* MSI-X failed, so fall through and try MSI */
2053                         e_err("Failed to initialize MSI-X interrupts.  Falling back to MSI interrupts.\n");
2054                         e1000e_reset_interrupt_capability(adapter);
2055                 }
2056                 adapter->int_mode = E1000E_INT_MODE_MSI;
2057                 /* Fall through */
2058         case E1000E_INT_MODE_MSI:
2059                 if (!pci_enable_msi(adapter->pdev)) {
2060                         adapter->flags |= FLAG_MSI_ENABLED;
2061                 } else {
2062                         adapter->int_mode = E1000E_INT_MODE_LEGACY;
2063                         e_err("Failed to initialize MSI interrupts.  Falling back to legacy interrupts.\n");
2064                 }
2065                 /* Fall through */
2066         case E1000E_INT_MODE_LEGACY:
2067                 /* Don't do anything; this is the system default */
2068                 break;
2069         }
2070
2071         /* store the number of vectors being used */
2072         adapter->num_vectors = 1;
2073 }
2074
2075 /**
2076  * e1000_request_msix - Initialize MSI-X interrupts
2077  *
2078  * e1000_request_msix allocates MSI-X vectors and requests interrupts from the
2079  * kernel.
2080  **/
2081 static int e1000_request_msix(struct e1000_adapter *adapter)
2082 {
2083         struct net_device *netdev = adapter->netdev;
2084         int err = 0, vector = 0;
2085
2086         if (strlen(netdev->name) < (IFNAMSIZ - 5))
2087                 snprintf(adapter->rx_ring->name,
2088                          sizeof(adapter->rx_ring->name) - 1,
2089                          "%s-rx-0", netdev->name);
2090         else
2091                 memcpy(adapter->rx_ring->name, netdev->name, IFNAMSIZ);
2092         err = request_irq(adapter->msix_entries[vector].vector,
2093                           e1000_intr_msix_rx, 0, adapter->rx_ring->name,
2094                           netdev);
2095         if (err)
2096                 return err;
2097         adapter->rx_ring->itr_register = adapter->hw.hw_addr +
2098             E1000_EITR_82574(vector);
2099         adapter->rx_ring->itr_val = adapter->itr;
2100         vector++;
2101
2102         if (strlen(netdev->name) < (IFNAMSIZ - 5))
2103                 snprintf(adapter->tx_ring->name,
2104                          sizeof(adapter->tx_ring->name) - 1,
2105                          "%s-tx-0", netdev->name);
2106         else
2107                 memcpy(adapter->tx_ring->name, netdev->name, IFNAMSIZ);
2108         err = request_irq(adapter->msix_entries[vector].vector,
2109                           e1000_intr_msix_tx, 0, adapter->tx_ring->name,
2110                           netdev);
2111         if (err)
2112                 return err;
2113         adapter->tx_ring->itr_register = adapter->hw.hw_addr +
2114             E1000_EITR_82574(vector);
2115         adapter->tx_ring->itr_val = adapter->itr;
2116         vector++;
2117
2118         err = request_irq(adapter->msix_entries[vector].vector,
2119                           e1000_msix_other, 0, netdev->name, netdev);
2120         if (err)
2121                 return err;
2122
2123         e1000_configure_msix(adapter);
2124
2125         return 0;
2126 }
2127
2128 /**
2129  * e1000_request_irq - initialize interrupts
2130  *
2131  * Attempts to configure interrupts using the best available
2132  * capabilities of the hardware and kernel.
2133  **/
2134 static int e1000_request_irq(struct e1000_adapter *adapter)
2135 {
2136         struct net_device *netdev = adapter->netdev;
2137         int err;
2138
2139         if (adapter->msix_entries) {
2140                 err = e1000_request_msix(adapter);
2141                 if (!err)
2142                         return err;
2143                 /* fall back to MSI */
2144                 e1000e_reset_interrupt_capability(adapter);
2145                 adapter->int_mode = E1000E_INT_MODE_MSI;
2146                 e1000e_set_interrupt_capability(adapter);
2147         }
2148         if (adapter->flags & FLAG_MSI_ENABLED) {
2149                 err = request_irq(adapter->pdev->irq, e1000_intr_msi, 0,
2150                                   netdev->name, netdev);
2151                 if (!err)
2152                         return err;
2153
2154                 /* fall back to legacy interrupt */
2155                 e1000e_reset_interrupt_capability(adapter);
2156                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
2157         }
2158
2159         err = request_irq(adapter->pdev->irq, e1000_intr, IRQF_SHARED,
2160                           netdev->name, netdev);
2161         if (err)
2162                 e_err("Unable to allocate interrupt, Error: %d\n", err);
2163
2164         return err;
2165 }
2166
2167 static void e1000_free_irq(struct e1000_adapter *adapter)
2168 {
2169         struct net_device *netdev = adapter->netdev;
2170
2171         if (adapter->msix_entries) {
2172                 int vector = 0;
2173
2174                 free_irq(adapter->msix_entries[vector].vector, netdev);
2175                 vector++;
2176
2177                 free_irq(adapter->msix_entries[vector].vector, netdev);
2178                 vector++;
2179
2180                 /* Other Causes interrupt vector */
2181                 free_irq(adapter->msix_entries[vector].vector, netdev);
2182                 return;
2183         }
2184
2185         free_irq(adapter->pdev->irq, netdev);
2186 }
2187
2188 /**
2189  * e1000_irq_disable - Mask off interrupt generation on the NIC
2190  **/
2191 static void e1000_irq_disable(struct e1000_adapter *adapter)
2192 {
2193         struct e1000_hw *hw = &adapter->hw;
2194
2195         ew32(IMC, ~0);
2196         if (adapter->msix_entries)
2197                 ew32(EIAC_82574, 0);
2198         e1e_flush();
2199
2200         if (adapter->msix_entries) {
2201                 int i;
2202                 for (i = 0; i < adapter->num_vectors; i++)
2203                         synchronize_irq(adapter->msix_entries[i].vector);
2204         } else {
2205                 synchronize_irq(adapter->pdev->irq);
2206         }
2207 }
2208
2209 /**
2210  * e1000_irq_enable - Enable default interrupt generation settings
2211  **/
2212 static void e1000_irq_enable(struct e1000_adapter *adapter)
2213 {
2214         struct e1000_hw *hw = &adapter->hw;
2215
2216         if (adapter->msix_entries) {
2217                 ew32(EIAC_82574, adapter->eiac_mask & E1000_EIAC_MASK_82574);
2218                 ew32(IMS, adapter->eiac_mask | E1000_IMS_OTHER | E1000_IMS_LSC);
2219         } else if (hw->mac.type == e1000_pch_lpt) {
2220                 ew32(IMS, IMS_ENABLE_MASK | E1000_IMS_ECCER);
2221         } else {
2222                 ew32(IMS, IMS_ENABLE_MASK);
2223         }
2224         e1e_flush();
2225 }
2226
2227 /**
2228  * e1000e_get_hw_control - get control of the h/w from f/w
2229  * @adapter: address of board private structure
2230  *
2231  * e1000e_get_hw_control sets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2232  * For ASF and Pass Through versions of f/w this means that
2233  * the driver is loaded. For AMT version (only with 82573)
2234  * of the f/w this means that the network i/f is open.
2235  **/
2236 void e1000e_get_hw_control(struct e1000_adapter *adapter)
2237 {
2238         struct e1000_hw *hw = &adapter->hw;
2239         u32 ctrl_ext;
2240         u32 swsm;
2241
2242         /* Let firmware know the driver has taken over */
2243         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2244                 swsm = er32(SWSM);
2245                 ew32(SWSM, swsm | E1000_SWSM_DRV_LOAD);
2246         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2247                 ctrl_ext = er32(CTRL_EXT);
2248                 ew32(CTRL_EXT, ctrl_ext | E1000_CTRL_EXT_DRV_LOAD);
2249         }
2250 }
2251
2252 /**
2253  * e1000e_release_hw_control - release control of the h/w to f/w
2254  * @adapter: address of board private structure
2255  *
2256  * e1000e_release_hw_control resets {CTRL_EXT|SWSM}:DRV_LOAD bit.
2257  * For ASF and Pass Through versions of f/w this means that the
2258  * driver is no longer loaded. For AMT version (only with 82573) i
2259  * of the f/w this means that the network i/f is closed.
2260  *
2261  **/
2262 void e1000e_release_hw_control(struct e1000_adapter *adapter)
2263 {
2264         struct e1000_hw *hw = &adapter->hw;
2265         u32 ctrl_ext;
2266         u32 swsm;
2267
2268         /* Let firmware taken over control of h/w */
2269         if (adapter->flags & FLAG_HAS_SWSM_ON_LOAD) {
2270                 swsm = er32(SWSM);
2271                 ew32(SWSM, swsm & ~E1000_SWSM_DRV_LOAD);
2272         } else if (adapter->flags & FLAG_HAS_CTRLEXT_ON_LOAD) {
2273                 ctrl_ext = er32(CTRL_EXT);
2274                 ew32(CTRL_EXT, ctrl_ext & ~E1000_CTRL_EXT_DRV_LOAD);
2275         }
2276 }
2277
2278 /**
2279  * e1000_alloc_ring_dma - allocate memory for a ring structure
2280  **/
2281 static int e1000_alloc_ring_dma(struct e1000_adapter *adapter,
2282                                 struct e1000_ring *ring)
2283 {
2284         struct pci_dev *pdev = adapter->pdev;
2285
2286         ring->desc = dma_alloc_coherent(&pdev->dev, ring->size, &ring->dma,
2287                                         GFP_KERNEL);
2288         if (!ring->desc)
2289                 return -ENOMEM;
2290
2291         return 0;
2292 }
2293
2294 /**
2295  * e1000e_setup_tx_resources - allocate Tx resources (Descriptors)
2296  * @tx_ring: Tx descriptor ring
2297  *
2298  * Return 0 on success, negative on failure
2299  **/
2300 int e1000e_setup_tx_resources(struct e1000_ring *tx_ring)
2301 {
2302         struct e1000_adapter *adapter = tx_ring->adapter;
2303         int err = -ENOMEM, size;
2304
2305         size = sizeof(struct e1000_buffer) * tx_ring->count;
2306         tx_ring->buffer_info = vzalloc(size);
2307         if (!tx_ring->buffer_info)
2308                 goto err;
2309
2310         /* round up to nearest 4K */
2311         tx_ring->size = tx_ring->count * sizeof(struct e1000_tx_desc);
2312         tx_ring->size = ALIGN(tx_ring->size, 4096);
2313
2314         err = e1000_alloc_ring_dma(adapter, tx_ring);
2315         if (err)
2316                 goto err;
2317
2318         tx_ring->next_to_use = 0;
2319         tx_ring->next_to_clean = 0;
2320
2321         return 0;
2322 err:
2323         vfree(tx_ring->buffer_info);
2324         e_err("Unable to allocate memory for the transmit descriptor ring\n");
2325         return err;
2326 }
2327
2328 /**
2329  * e1000e_setup_rx_resources - allocate Rx resources (Descriptors)
2330  * @rx_ring: Rx descriptor ring
2331  *
2332  * Returns 0 on success, negative on failure
2333  **/
2334 int e1000e_setup_rx_resources(struct e1000_ring *rx_ring)
2335 {
2336         struct e1000_adapter *adapter = rx_ring->adapter;
2337         struct e1000_buffer *buffer_info;
2338         int i, size, desc_len, err = -ENOMEM;
2339
2340         size = sizeof(struct e1000_buffer) * rx_ring->count;
2341         rx_ring->buffer_info = vzalloc(size);
2342         if (!rx_ring->buffer_info)
2343                 goto err;
2344
2345         for (i = 0; i < rx_ring->count; i++) {
2346                 buffer_info = &rx_ring->buffer_info[i];
2347                 buffer_info->ps_pages = kcalloc(PS_PAGE_BUFFERS,
2348                                                 sizeof(struct e1000_ps_page),
2349                                                 GFP_KERNEL);
2350                 if (!buffer_info->ps_pages)
2351                         goto err_pages;
2352         }
2353
2354         desc_len = sizeof(union e1000_rx_desc_packet_split);
2355
2356         /* Round up to nearest 4K */
2357         rx_ring->size = rx_ring->count * desc_len;
2358         rx_ring->size = ALIGN(rx_ring->size, 4096);
2359
2360         err = e1000_alloc_ring_dma(adapter, rx_ring);
2361         if (err)
2362                 goto err_pages;
2363
2364         rx_ring->next_to_clean = 0;
2365         rx_ring->next_to_use = 0;
2366         rx_ring->rx_skb_top = NULL;
2367
2368         return 0;
2369
2370 err_pages:
2371         for (i = 0; i < rx_ring->count; i++) {
2372                 buffer_info = &rx_ring->buffer_info[i];
2373                 kfree(buffer_info->ps_pages);
2374         }
2375 err:
2376         vfree(rx_ring->buffer_info);
2377         e_err("Unable to allocate memory for the receive descriptor ring\n");
2378         return err;
2379 }
2380
2381 /**
2382  * e1000_clean_tx_ring - Free Tx Buffers
2383  * @tx_ring: Tx descriptor ring
2384  **/
2385 static void e1000_clean_tx_ring(struct e1000_ring *tx_ring)
2386 {
2387         struct e1000_adapter *adapter = tx_ring->adapter;
2388         struct e1000_buffer *buffer_info;
2389         unsigned long size;
2390         unsigned int i;
2391
2392         for (i = 0; i < tx_ring->count; i++) {
2393                 buffer_info = &tx_ring->buffer_info[i];
2394                 e1000_put_txbuf(tx_ring, buffer_info);
2395         }
2396
2397         netdev_reset_queue(adapter->netdev);
2398         size = sizeof(struct e1000_buffer) * tx_ring->count;
2399         memset(tx_ring->buffer_info, 0, size);
2400
2401         memset(tx_ring->desc, 0, tx_ring->size);
2402
2403         tx_ring->next_to_use = 0;
2404         tx_ring->next_to_clean = 0;
2405
2406         writel(0, tx_ring->head);
2407         if (tx_ring->adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
2408                 e1000e_update_tdt_wa(tx_ring, 0);
2409         else
2410                 writel(0, tx_ring->tail);
2411 }
2412
2413 /**
2414  * e1000e_free_tx_resources - Free Tx Resources per Queue
2415  * @tx_ring: Tx descriptor ring
2416  *
2417  * Free all transmit software resources
2418  **/
2419 void e1000e_free_tx_resources(struct e1000_ring *tx_ring)
2420 {
2421         struct e1000_adapter *adapter = tx_ring->adapter;
2422         struct pci_dev *pdev = adapter->pdev;
2423
2424         e1000_clean_tx_ring(tx_ring);
2425
2426         vfree(tx_ring->buffer_info);
2427         tx_ring->buffer_info = NULL;
2428
2429         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
2430                           tx_ring->dma);
2431         tx_ring->desc = NULL;
2432 }
2433
2434 /**
2435  * e1000e_free_rx_resources - Free Rx Resources
2436  * @rx_ring: Rx descriptor ring
2437  *
2438  * Free all receive software resources
2439  **/
2440 void e1000e_free_rx_resources(struct e1000_ring *rx_ring)
2441 {
2442         struct e1000_adapter *adapter = rx_ring->adapter;
2443         struct pci_dev *pdev = adapter->pdev;
2444         int i;
2445
2446         e1000_clean_rx_ring(rx_ring);
2447
2448         for (i = 0; i < rx_ring->count; i++)
2449                 kfree(rx_ring->buffer_info[i].ps_pages);
2450
2451         vfree(rx_ring->buffer_info);
2452         rx_ring->buffer_info = NULL;
2453
2454         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
2455                           rx_ring->dma);
2456         rx_ring->desc = NULL;
2457 }
2458
2459 /**
2460  * e1000_update_itr - update the dynamic ITR value based on statistics
2461  * @adapter: pointer to adapter
2462  * @itr_setting: current adapter->itr
2463  * @packets: the number of packets during this measurement interval
2464  * @bytes: the number of bytes during this measurement interval
2465  *
2466  *      Stores a new ITR value based on packets and byte
2467  *      counts during the last interrupt.  The advantage of per interrupt
2468  *      computation is faster updates and more accurate ITR for the current
2469  *      traffic pattern.  Constants in this function were computed
2470  *      based on theoretical maximum wire speed and thresholds were set based
2471  *      on testing data as well as attempting to minimize response time
2472  *      while increasing bulk throughput.  This functionality is controlled
2473  *      by the InterruptThrottleRate module parameter.
2474  **/
2475 static unsigned int e1000_update_itr(u16 itr_setting, int packets, int bytes)
2476 {
2477         unsigned int retval = itr_setting;
2478
2479         if (packets == 0)
2480                 return itr_setting;
2481
2482         switch (itr_setting) {
2483         case lowest_latency:
2484                 /* handle TSO and jumbo frames */
2485                 if (bytes / packets > 8000)
2486                         retval = bulk_latency;
2487                 else if ((packets < 5) && (bytes > 512))
2488                         retval = low_latency;
2489                 break;
2490         case low_latency:       /* 50 usec aka 20000 ints/s */
2491                 if (bytes > 10000) {
2492                         /* this if handles the TSO accounting */
2493                         if (bytes / packets > 8000)
2494                                 retval = bulk_latency;
2495                         else if ((packets < 10) || ((bytes / packets) > 1200))
2496                                 retval = bulk_latency;
2497                         else if ((packets > 35))
2498                                 retval = lowest_latency;
2499                 } else if (bytes / packets > 2000) {
2500                         retval = bulk_latency;
2501                 } else if (packets <= 2 && bytes < 512) {
2502                         retval = lowest_latency;
2503                 }
2504                 break;
2505         case bulk_latency:      /* 250 usec aka 4000 ints/s */
2506                 if (bytes > 25000) {
2507                         if (packets > 35)
2508                                 retval = low_latency;
2509                 } else if (bytes < 6000) {
2510                         retval = low_latency;
2511                 }
2512                 break;
2513         }
2514
2515         return retval;
2516 }
2517
2518 static void e1000_set_itr(struct e1000_adapter *adapter)
2519 {
2520         u16 current_itr;
2521         u32 new_itr = adapter->itr;
2522
2523         /* for non-gigabit speeds, just fix the interrupt rate at 4000 */
2524         if (adapter->link_speed != SPEED_1000) {
2525                 current_itr = 0;
2526                 new_itr = 4000;
2527                 goto set_itr_now;
2528         }
2529
2530         if (adapter->flags2 & FLAG2_DISABLE_AIM) {
2531                 new_itr = 0;
2532                 goto set_itr_now;
2533         }
2534
2535         adapter->tx_itr = e1000_update_itr(adapter->tx_itr,
2536                                            adapter->total_tx_packets,
2537                                            adapter->total_tx_bytes);
2538         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2539         if (adapter->itr_setting == 3 && adapter->tx_itr == lowest_latency)
2540                 adapter->tx_itr = low_latency;
2541
2542         adapter->rx_itr = e1000_update_itr(adapter->rx_itr,
2543                                            adapter->total_rx_packets,
2544                                            adapter->total_rx_bytes);
2545         /* conservative mode (itr 3) eliminates the lowest_latency setting */
2546         if (adapter->itr_setting == 3 && adapter->rx_itr == lowest_latency)
2547                 adapter->rx_itr = low_latency;
2548
2549         current_itr = max(adapter->rx_itr, adapter->tx_itr);
2550
2551         /* counts and packets in update_itr are dependent on these numbers */
2552         switch (current_itr) {
2553         case lowest_latency:
2554                 new_itr = 70000;
2555                 break;
2556         case low_latency:
2557                 new_itr = 20000;        /* aka hwitr = ~200 */
2558                 break;
2559         case bulk_latency:
2560                 new_itr = 4000;
2561                 break;
2562         default:
2563                 break;
2564         }
2565
2566 set_itr_now:
2567         if (new_itr != adapter->itr) {
2568                 /* this attempts to bias the interrupt rate towards Bulk
2569                  * by adding intermediate steps when interrupt rate is
2570                  * increasing
2571                  */
2572                 new_itr = new_itr > adapter->itr ?
2573                     min(adapter->itr + (new_itr >> 2), new_itr) : new_itr;
2574                 adapter->itr = new_itr;
2575                 adapter->rx_ring->itr_val = new_itr;
2576                 if (adapter->msix_entries)
2577                         adapter->rx_ring->set_itr = 1;
2578                 else
2579                         e1000e_write_itr(adapter, new_itr);
2580         }
2581 }
2582
2583 /**
2584  * e1000e_write_itr - write the ITR value to the appropriate registers
2585  * @adapter: address of board private structure
2586  * @itr: new ITR value to program
2587  *
2588  * e1000e_write_itr determines if the adapter is in MSI-X mode
2589  * and, if so, writes the EITR registers with the ITR value.
2590  * Otherwise, it writes the ITR value into the ITR register.
2591  **/
2592 void e1000e_write_itr(struct e1000_adapter *adapter, u32 itr)
2593 {
2594         struct e1000_hw *hw = &adapter->hw;
2595         u32 new_itr = itr ? 1000000000 / (itr * 256) : 0;
2596
2597         if (adapter->msix_entries) {
2598                 int vector;
2599
2600                 for (vector = 0; vector < adapter->num_vectors; vector++)
2601                         writel(new_itr, hw->hw_addr + E1000_EITR_82574(vector));
2602         } else {
2603                 ew32(ITR, new_itr);
2604         }
2605 }
2606
2607 /**
2608  * e1000_alloc_queues - Allocate memory for all rings
2609  * @adapter: board private structure to initialize
2610  **/
2611 static int e1000_alloc_queues(struct e1000_adapter *adapter)
2612 {
2613         int size = sizeof(struct e1000_ring);
2614
2615         adapter->tx_ring = kzalloc(size, GFP_KERNEL);
2616         if (!adapter->tx_ring)
2617                 goto err;
2618         adapter->tx_ring->count = adapter->tx_ring_count;
2619         adapter->tx_ring->adapter = adapter;
2620
2621         adapter->rx_ring = kzalloc(size, GFP_KERNEL);
2622         if (!adapter->rx_ring)
2623                 goto err;
2624         adapter->rx_ring->count = adapter->rx_ring_count;
2625         adapter->rx_ring->adapter = adapter;
2626
2627         return 0;
2628 err:
2629         e_err("Unable to allocate memory for queues\n");
2630         kfree(adapter->rx_ring);
2631         kfree(adapter->tx_ring);
2632         return -ENOMEM;
2633 }
2634
2635 /**
2636  * e1000e_poll - NAPI Rx polling callback
2637  * @napi: struct associated with this polling callback
2638  * @weight: number of packets driver is allowed to process this poll
2639  **/
2640 static int e1000e_poll(struct napi_struct *napi, int weight)
2641 {
2642         struct e1000_adapter *adapter = container_of(napi, struct e1000_adapter,
2643                                                      napi);
2644         struct e1000_hw *hw = &adapter->hw;
2645         struct net_device *poll_dev = adapter->netdev;
2646         int tx_cleaned = 1, work_done = 0;
2647
2648         adapter = netdev_priv(poll_dev);
2649
2650         if (!adapter->msix_entries ||
2651             (adapter->rx_ring->ims_val & adapter->tx_ring->ims_val))
2652                 tx_cleaned = e1000_clean_tx_irq(adapter->tx_ring);
2653
2654         adapter->clean_rx(adapter->rx_ring, &work_done, weight);
2655
2656         if (!tx_cleaned)
2657                 work_done = weight;
2658
2659         /* If weight not fully consumed, exit the polling mode */
2660         if (work_done < weight) {
2661                 if (adapter->itr_setting & 3)
2662                         e1000_set_itr(adapter);
2663                 napi_complete(napi);
2664                 if (!test_bit(__E1000_DOWN, &adapter->state)) {
2665                         if (adapter->msix_entries)
2666                                 ew32(IMS, adapter->rx_ring->ims_val);
2667                         else
2668                                 e1000_irq_enable(adapter);
2669                 }
2670         }
2671
2672         return work_done;
2673 }
2674
2675 static int e1000_vlan_rx_add_vid(struct net_device *netdev,
2676                                  __always_unused __be16 proto, u16 vid)
2677 {
2678         struct e1000_adapter *adapter = netdev_priv(netdev);
2679         struct e1000_hw *hw = &adapter->hw;
2680         u32 vfta, index;
2681
2682         /* don't update vlan cookie if already programmed */
2683         if ((adapter->hw.mng_cookie.status &
2684              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2685             (vid == adapter->mng_vlan_id))
2686                 return 0;
2687
2688         /* add VID to filter table */
2689         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2690                 index = (vid >> 5) & 0x7F;
2691                 vfta = E1000_READ_REG_ARRAY(hw, E1000_VFTA, index);
2692                 vfta |= (1 << (vid & 0x1F));
2693                 hw->mac.ops.write_vfta(hw, index, vfta);
2694         }
2695
2696         set_bit(vid, adapter->active_vlans);
2697
2698         return 0;
2699 }
2700
2701 static int e1000_vlan_rx_kill_vid(struct net_device *netdev,
2702                                   __always_unused __be16 proto, u16 vid)
2703 {
2704         struct e1000_adapter *adapter = netdev_priv(netdev);
2705         struct e1000_hw *hw = &adapter->hw;
2706         u32 vfta, index;
2707
2708         if ((adapter->hw.mng_cookie.status &
2709              E1000_MNG_DHCP_COOKIE_STATUS_VLAN) &&
2710             (vid == adapter->mng_vlan_id)) {
2711                 /* release control to f/w */
2712                 e1000e_release_hw_control(adapter);
2713                 return 0;
2714         }
2715
2716         /* remove VID from 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         clear_bit(vid, adapter->active_vlans);
2725
2726         return 0;
2727 }
2728
2729 /**
2730  * e1000e_vlan_filter_disable - helper to disable hw VLAN filtering
2731  * @adapter: board private structure to initialize
2732  **/
2733 static void e1000e_vlan_filter_disable(struct e1000_adapter *adapter)
2734 {
2735         struct net_device *netdev = adapter->netdev;
2736         struct e1000_hw *hw = &adapter->hw;
2737         u32 rctl;
2738
2739         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2740                 /* disable VLAN receive filtering */
2741                 rctl = er32(RCTL);
2742                 rctl &= ~(E1000_RCTL_VFE | E1000_RCTL_CFIEN);
2743                 ew32(RCTL, rctl);
2744
2745                 if (adapter->mng_vlan_id != (u16)E1000_MNG_VLAN_NONE) {
2746                         e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
2747                                                adapter->mng_vlan_id);
2748                         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
2749                 }
2750         }
2751 }
2752
2753 /**
2754  * e1000e_vlan_filter_enable - helper to enable HW VLAN filtering
2755  * @adapter: board private structure to initialize
2756  **/
2757 static void e1000e_vlan_filter_enable(struct e1000_adapter *adapter)
2758 {
2759         struct e1000_hw *hw = &adapter->hw;
2760         u32 rctl;
2761
2762         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER) {
2763                 /* enable VLAN receive filtering */
2764                 rctl = er32(RCTL);
2765                 rctl |= E1000_RCTL_VFE;
2766                 rctl &= ~E1000_RCTL_CFIEN;
2767                 ew32(RCTL, rctl);
2768         }
2769 }
2770
2771 /**
2772  * e1000e_vlan_strip_enable - helper to disable HW VLAN stripping
2773  * @adapter: board private structure to initialize
2774  **/
2775 static void e1000e_vlan_strip_disable(struct e1000_adapter *adapter)
2776 {
2777         struct e1000_hw *hw = &adapter->hw;
2778         u32 ctrl;
2779
2780         /* disable VLAN tag insert/strip */
2781         ctrl = er32(CTRL);
2782         ctrl &= ~E1000_CTRL_VME;
2783         ew32(CTRL, ctrl);
2784 }
2785
2786 /**
2787  * e1000e_vlan_strip_enable - helper to enable HW VLAN stripping
2788  * @adapter: board private structure to initialize
2789  **/
2790 static void e1000e_vlan_strip_enable(struct e1000_adapter *adapter)
2791 {
2792         struct e1000_hw *hw = &adapter->hw;
2793         u32 ctrl;
2794
2795         /* enable VLAN tag insert/strip */
2796         ctrl = er32(CTRL);
2797         ctrl |= E1000_CTRL_VME;
2798         ew32(CTRL, ctrl);
2799 }
2800
2801 static void e1000_update_mng_vlan(struct e1000_adapter *adapter)
2802 {
2803         struct net_device *netdev = adapter->netdev;
2804         u16 vid = adapter->hw.mng_cookie.vlan_id;
2805         u16 old_vid = adapter->mng_vlan_id;
2806
2807         if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN) {
2808                 e1000_vlan_rx_add_vid(netdev, htons(ETH_P_8021Q), vid);
2809                 adapter->mng_vlan_id = vid;
2810         }
2811
2812         if ((old_vid != (u16)E1000_MNG_VLAN_NONE) && (vid != old_vid))
2813                 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q), old_vid);
2814 }
2815
2816 static void e1000_restore_vlan(struct e1000_adapter *adapter)
2817 {
2818         u16 vid;
2819
2820         e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), 0);
2821
2822         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
2823             e1000_vlan_rx_add_vid(adapter->netdev, htons(ETH_P_8021Q), vid);
2824 }
2825
2826 static void e1000_init_manageability_pt(struct e1000_adapter *adapter)
2827 {
2828         struct e1000_hw *hw = &adapter->hw;
2829         u32 manc, manc2h, mdef, i, j;
2830
2831         if (!(adapter->flags & FLAG_MNG_PT_ENABLED))
2832                 return;
2833
2834         manc = er32(MANC);
2835
2836         /* enable receiving management packets to the host. this will probably
2837          * generate destination unreachable messages from the host OS, but
2838          * the packets will be handled on SMBUS
2839          */
2840         manc |= E1000_MANC_EN_MNG2HOST;
2841         manc2h = er32(MANC2H);
2842
2843         switch (hw->mac.type) {
2844         default:
2845                 manc2h |= (E1000_MANC2H_PORT_623 | E1000_MANC2H_PORT_664);
2846                 break;
2847         case e1000_82574:
2848         case e1000_82583:
2849                 /* Check if IPMI pass-through decision filter already exists;
2850                  * if so, enable it.
2851                  */
2852                 for (i = 0, j = 0; i < 8; i++) {
2853                         mdef = er32(MDEF(i));
2854
2855                         /* Ignore filters with anything other than IPMI ports */
2856                         if (mdef & ~(E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2857                                 continue;
2858
2859                         /* Enable this decision filter in MANC2H */
2860                         if (mdef)
2861                                 manc2h |= (1 << i);
2862
2863                         j |= mdef;
2864                 }
2865
2866                 if (j == (E1000_MDEF_PORT_623 | E1000_MDEF_PORT_664))
2867                         break;
2868
2869                 /* Create new decision filter in an empty filter */
2870                 for (i = 0, j = 0; i < 8; i++)
2871                         if (er32(MDEF(i)) == 0) {
2872                                 ew32(MDEF(i), (E1000_MDEF_PORT_623 |
2873                                                E1000_MDEF_PORT_664));
2874                                 manc2h |= (1 << 1);
2875                                 j++;
2876                                 break;
2877                         }
2878
2879                 if (!j)
2880                         e_warn("Unable to create IPMI pass-through filter\n");
2881                 break;
2882         }
2883
2884         ew32(MANC2H, manc2h);
2885         ew32(MANC, manc);
2886 }
2887
2888 /**
2889  * e1000_configure_tx - Configure Transmit Unit after Reset
2890  * @adapter: board private structure
2891  *
2892  * Configure the Tx unit of the MAC after a reset.
2893  **/
2894 static void e1000_configure_tx(struct e1000_adapter *adapter)
2895 {
2896         struct e1000_hw *hw = &adapter->hw;
2897         struct e1000_ring *tx_ring = adapter->tx_ring;
2898         u64 tdba;
2899         u32 tdlen, tarc;
2900
2901         /* Setup the HW Tx Head and Tail descriptor pointers */
2902         tdba = tx_ring->dma;
2903         tdlen = tx_ring->count * sizeof(struct e1000_tx_desc);
2904         ew32(TDBAL(0), (tdba & DMA_BIT_MASK(32)));
2905         ew32(TDBAH(0), (tdba >> 32));
2906         ew32(TDLEN(0), tdlen);
2907         ew32(TDH(0), 0);
2908         ew32(TDT(0), 0);
2909         tx_ring->head = adapter->hw.hw_addr + E1000_TDH(0);
2910         tx_ring->tail = adapter->hw.hw_addr + E1000_TDT(0);
2911
2912         /* Set the Tx Interrupt Delay register */
2913         ew32(TIDV, adapter->tx_int_delay);
2914         /* Tx irq moderation */
2915         ew32(TADV, adapter->tx_abs_int_delay);
2916
2917         if (adapter->flags2 & FLAG2_DMA_BURST) {
2918                 u32 txdctl = er32(TXDCTL(0));
2919                 txdctl &= ~(E1000_TXDCTL_PTHRESH | E1000_TXDCTL_HTHRESH |
2920                             E1000_TXDCTL_WTHRESH);
2921                 /* set up some performance related parameters to encourage the
2922                  * hardware to use the bus more efficiently in bursts, depends
2923                  * on the tx_int_delay to be enabled,
2924                  * wthresh = 1 ==> burst write is disabled to avoid Tx stalls
2925                  * hthresh = 1 ==> prefetch when one or more available
2926                  * pthresh = 0x1f ==> prefetch if internal cache 31 or less
2927                  * BEWARE: this seems to work but should be considered first if
2928                  * there are Tx hangs or other Tx related bugs
2929                  */
2930                 txdctl |= E1000_TXDCTL_DMA_BURST_ENABLE;
2931                 ew32(TXDCTL(0), txdctl);
2932         }
2933         /* erratum work around: set txdctl the same for both queues */
2934         ew32(TXDCTL(1), er32(TXDCTL(0)));
2935
2936         if (adapter->flags & FLAG_TARC_SPEED_MODE_BIT) {
2937                 tarc = er32(TARC(0));
2938                 /* set the speed mode bit, we'll clear it if we're not at
2939                  * gigabit link later
2940                  */
2941 #define SPEED_MODE_BIT (1 << 21)
2942                 tarc |= SPEED_MODE_BIT;
2943                 ew32(TARC(0), tarc);
2944         }
2945
2946         /* errata: program both queues to unweighted RR */
2947         if (adapter->flags & FLAG_TARC_SET_BIT_ZERO) {
2948                 tarc = er32(TARC(0));
2949                 tarc |= 1;
2950                 ew32(TARC(0), tarc);
2951                 tarc = er32(TARC(1));
2952                 tarc |= 1;
2953                 ew32(TARC(1), tarc);
2954         }
2955
2956         /* Setup Transmit Descriptor Settings for eop descriptor */
2957         adapter->txd_cmd = E1000_TXD_CMD_EOP | E1000_TXD_CMD_IFCS;
2958
2959         /* only set IDE if we are delaying interrupts using the timers */
2960         if (adapter->tx_int_delay)
2961                 adapter->txd_cmd |= E1000_TXD_CMD_IDE;
2962
2963         /* enable Report Status bit */
2964         adapter->txd_cmd |= E1000_TXD_CMD_RS;
2965
2966         hw->mac.ops.config_collision_dist(hw);
2967 }
2968
2969 /**
2970  * e1000_setup_rctl - configure the receive control registers
2971  * @adapter: Board private structure
2972  **/
2973 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
2974                            (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
2975 static void e1000_setup_rctl(struct e1000_adapter *adapter)
2976 {
2977         struct e1000_hw *hw = &adapter->hw;
2978         u32 rctl, rfctl;
2979         u32 pages = 0;
2980
2981         /* Workaround Si errata on PCHx - configure jumbo frame flow */
2982         if (hw->mac.type >= e1000_pch2lan) {
2983                 s32 ret_val;
2984
2985                 if (adapter->netdev->mtu > ETH_DATA_LEN)
2986                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, true);
2987                 else
2988                         ret_val = e1000_lv_jumbo_workaround_ich8lan(hw, false);
2989
2990                 if (ret_val)
2991                         e_dbg("failed to enable jumbo frame workaround mode\n");
2992         }
2993
2994         /* Program MC offset vector base */
2995         rctl = er32(RCTL);
2996         rctl &= ~(3 << E1000_RCTL_MO_SHIFT);
2997         rctl |= E1000_RCTL_EN | E1000_RCTL_BAM |
2998             E1000_RCTL_LBM_NO | E1000_RCTL_RDMTS_HALF |
2999             (adapter->hw.mac.mc_filter_type << E1000_RCTL_MO_SHIFT);
3000
3001         /* Do not Store bad packets */
3002         rctl &= ~E1000_RCTL_SBP;
3003
3004         /* Enable Long Packet receive */
3005         if (adapter->netdev->mtu <= ETH_DATA_LEN)
3006                 rctl &= ~E1000_RCTL_LPE;
3007         else
3008                 rctl |= E1000_RCTL_LPE;
3009
3010         /* Some systems expect that the CRC is included in SMBUS traffic. The
3011          * hardware strips the CRC before sending to both SMBUS (BMC) and to
3012          * host memory when this is enabled
3013          */
3014         if (adapter->flags2 & FLAG2_CRC_STRIPPING)
3015                 rctl |= E1000_RCTL_SECRC;
3016
3017         /* Workaround Si errata on 82577 PHY - configure IPG for jumbos */
3018         if ((hw->phy.type == e1000_phy_82577) && (rctl & E1000_RCTL_LPE)) {
3019                 u16 phy_data;
3020
3021                 e1e_rphy(hw, PHY_REG(770, 26), &phy_data);
3022                 phy_data &= 0xfff8;
3023                 phy_data |= (1 << 2);
3024                 e1e_wphy(hw, PHY_REG(770, 26), phy_data);
3025
3026                 e1e_rphy(hw, 22, &phy_data);
3027                 phy_data &= 0x0fff;
3028                 phy_data |= (1 << 14);
3029                 e1e_wphy(hw, 0x10, 0x2823);
3030                 e1e_wphy(hw, 0x11, 0x0003);
3031                 e1e_wphy(hw, 22, phy_data);
3032         }
3033
3034         /* Setup buffer sizes */
3035         rctl &= ~E1000_RCTL_SZ_4096;
3036         rctl |= E1000_RCTL_BSEX;
3037         switch (adapter->rx_buffer_len) {
3038         case 2048:
3039         default:
3040                 rctl |= E1000_RCTL_SZ_2048;
3041                 rctl &= ~E1000_RCTL_BSEX;
3042                 break;
3043         case 4096:
3044                 rctl |= E1000_RCTL_SZ_4096;
3045                 break;
3046         case 8192:
3047                 rctl |= E1000_RCTL_SZ_8192;
3048                 break;
3049         case 16384:
3050                 rctl |= E1000_RCTL_SZ_16384;
3051                 break;
3052         }
3053
3054         /* Enable Extended Status in all Receive Descriptors */
3055         rfctl = er32(RFCTL);
3056         rfctl |= E1000_RFCTL_EXTEN;
3057         ew32(RFCTL, rfctl);
3058
3059         /* 82571 and greater support packet-split where the protocol
3060          * header is placed in skb->data and the packet data is
3061          * placed in pages hanging off of skb_shinfo(skb)->nr_frags.
3062          * In the case of a non-split, skb->data is linearly filled,
3063          * followed by the page buffers.  Therefore, skb->data is
3064          * sized to hold the largest protocol header.
3065          *
3066          * allocations using alloc_page take too long for regular MTU
3067          * so only enable packet split for jumbo frames
3068          *
3069          * Using pages when the page size is greater than 16k wastes
3070          * a lot of memory, since we allocate 3 pages at all times
3071          * per packet.
3072          */
3073         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
3074         if ((pages <= 3) && (PAGE_SIZE <= 16384) && (rctl & E1000_RCTL_LPE))
3075                 adapter->rx_ps_pages = pages;
3076         else
3077                 adapter->rx_ps_pages = 0;
3078
3079         if (adapter->rx_ps_pages) {
3080                 u32 psrctl = 0;
3081
3082                 /* Enable Packet split descriptors */
3083                 rctl |= E1000_RCTL_DTYP_PS;
3084
3085                 psrctl |= adapter->rx_ps_bsize0 >> E1000_PSRCTL_BSIZE0_SHIFT;
3086
3087                 switch (adapter->rx_ps_pages) {
3088                 case 3:
3089                         psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE3_SHIFT;
3090                         /* fall-through */
3091                 case 2:
3092                         psrctl |= PAGE_SIZE << E1000_PSRCTL_BSIZE2_SHIFT;
3093                         /* fall-through */
3094                 case 1:
3095                         psrctl |= PAGE_SIZE >> E1000_PSRCTL_BSIZE1_SHIFT;
3096                         break;
3097                 }
3098
3099                 ew32(PSRCTL, psrctl);
3100         }
3101
3102         /* This is useful for sniffing bad packets. */
3103         if (adapter->netdev->features & NETIF_F_RXALL) {
3104                 /* UPE and MPE will be handled by normal PROMISC logic
3105                  * in e1000e_set_rx_mode
3106                  */
3107                 rctl |= (E1000_RCTL_SBP |       /* Receive bad packets */
3108                          E1000_RCTL_BAM |       /* RX All Bcast Pkts */
3109                          E1000_RCTL_PMCF);      /* RX All MAC Ctrl Pkts */
3110
3111                 rctl &= ~(E1000_RCTL_VFE |      /* Disable VLAN filter */
3112                           E1000_RCTL_DPF |      /* Allow filtered pause */
3113                           E1000_RCTL_CFIEN);    /* Dis VLAN CFIEN Filter */
3114                 /* Do not mess with E1000_CTRL_VME, it affects transmit as well,
3115                  * and that breaks VLANs.
3116                  */
3117         }
3118
3119         ew32(RCTL, rctl);
3120         /* just started the receive unit, no need to restart */
3121         adapter->flags &= ~FLAG_RESTART_NOW;
3122 }
3123
3124 /**
3125  * e1000_configure_rx - Configure Receive Unit after Reset
3126  * @adapter: board private structure
3127  *
3128  * Configure the Rx unit of the MAC after a reset.
3129  **/
3130 static void e1000_configure_rx(struct e1000_adapter *adapter)
3131 {
3132         struct e1000_hw *hw = &adapter->hw;
3133         struct e1000_ring *rx_ring = adapter->rx_ring;
3134         u64 rdba;
3135         u32 rdlen, rctl, rxcsum, ctrl_ext;
3136
3137         if (adapter->rx_ps_pages) {
3138                 /* this is a 32 byte descriptor */
3139                 rdlen = rx_ring->count *
3140                     sizeof(union e1000_rx_desc_packet_split);
3141                 adapter->clean_rx = e1000_clean_rx_irq_ps;
3142                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers_ps;
3143         } else if (adapter->netdev->mtu > ETH_FRAME_LEN + ETH_FCS_LEN) {
3144                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3145                 adapter->clean_rx = e1000_clean_jumbo_rx_irq;
3146                 adapter->alloc_rx_buf = e1000_alloc_jumbo_rx_buffers;
3147         } else {
3148                 rdlen = rx_ring->count * sizeof(union e1000_rx_desc_extended);
3149                 adapter->clean_rx = e1000_clean_rx_irq;
3150                 adapter->alloc_rx_buf = e1000_alloc_rx_buffers;
3151         }
3152
3153         /* disable receives while setting up the descriptors */
3154         rctl = er32(RCTL);
3155         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
3156                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
3157         e1e_flush();
3158         usleep_range(10000, 20000);
3159
3160         if (adapter->flags2 & FLAG2_DMA_BURST) {
3161                 /* set the writeback threshold (only takes effect if the RDTR
3162                  * is set). set GRAN=1 and write back up to 0x4 worth, and
3163                  * enable prefetching of 0x20 Rx descriptors
3164                  * granularity = 01
3165                  * wthresh = 04,
3166                  * hthresh = 04,
3167                  * pthresh = 0x20
3168                  */
3169                 ew32(RXDCTL(0), E1000_RXDCTL_DMA_BURST_ENABLE);
3170                 ew32(RXDCTL(1), E1000_RXDCTL_DMA_BURST_ENABLE);
3171
3172                 /* override the delay timers for enabling bursting, only if
3173                  * the value was not set by the user via module options
3174                  */
3175                 if (adapter->rx_int_delay == DEFAULT_RDTR)
3176                         adapter->rx_int_delay = BURST_RDTR;
3177                 if (adapter->rx_abs_int_delay == DEFAULT_RADV)
3178                         adapter->rx_abs_int_delay = BURST_RADV;
3179         }
3180
3181         /* set the Receive Delay Timer Register */
3182         ew32(RDTR, adapter->rx_int_delay);
3183
3184         /* irq moderation */
3185         ew32(RADV, adapter->rx_abs_int_delay);
3186         if ((adapter->itr_setting != 0) && (adapter->itr != 0))
3187                 e1000e_write_itr(adapter, adapter->itr);
3188
3189         ctrl_ext = er32(CTRL_EXT);
3190         /* Auto-Mask interrupts upon ICR access */
3191         ctrl_ext |= E1000_CTRL_EXT_IAME;
3192         ew32(IAM, 0xffffffff);
3193         ew32(CTRL_EXT, ctrl_ext);
3194         e1e_flush();
3195
3196         /* Setup the HW Rx Head and Tail Descriptor Pointers and
3197          * the Base and Length of the Rx Descriptor Ring
3198          */
3199         rdba = rx_ring->dma;
3200         ew32(RDBAL(0), (rdba & DMA_BIT_MASK(32)));
3201         ew32(RDBAH(0), (rdba >> 32));
3202         ew32(RDLEN(0), rdlen);
3203         ew32(RDH(0), 0);
3204         ew32(RDT(0), 0);
3205         rx_ring->head = adapter->hw.hw_addr + E1000_RDH(0);
3206         rx_ring->tail = adapter->hw.hw_addr + E1000_RDT(0);
3207
3208         /* Enable Receive Checksum Offload for TCP and UDP */
3209         rxcsum = er32(RXCSUM);
3210         if (adapter->netdev->features & NETIF_F_RXCSUM)
3211                 rxcsum |= E1000_RXCSUM_TUOFL;
3212         else
3213                 rxcsum &= ~E1000_RXCSUM_TUOFL;
3214         ew32(RXCSUM, rxcsum);
3215
3216         /* With jumbo frames, excessive C-state transition latencies result
3217          * in dropped transactions.
3218          */
3219         if (adapter->netdev->mtu > ETH_DATA_LEN) {
3220                 u32 lat =
3221                     ((er32(PBA) & E1000_PBA_RXA_MASK) * 1024 -
3222                      adapter->max_frame_size) * 8 / 1000;
3223
3224                 if (adapter->flags & FLAG_IS_ICH) {
3225                         u32 rxdctl = er32(RXDCTL(0));
3226                         ew32(RXDCTL(0), rxdctl | 0x3);
3227                 }
3228
3229                 pm_qos_update_request(&adapter->netdev->pm_qos_req, lat);
3230         } else {
3231                 pm_qos_update_request(&adapter->netdev->pm_qos_req,
3232                                       PM_QOS_DEFAULT_VALUE);
3233         }
3234
3235         /* Enable Receives */
3236         ew32(RCTL, rctl);
3237 }
3238
3239 /**
3240  * e1000e_write_mc_addr_list - write multicast addresses to MTA
3241  * @netdev: network interface device structure
3242  *
3243  * Writes multicast address list to the MTA hash table.
3244  * Returns: -ENOMEM on failure
3245  *                0 on no addresses written
3246  *                X on writing X addresses to MTA
3247  */
3248 static int e1000e_write_mc_addr_list(struct net_device *netdev)
3249 {
3250         struct e1000_adapter *adapter = netdev_priv(netdev);
3251         struct e1000_hw *hw = &adapter->hw;
3252         struct netdev_hw_addr *ha;
3253         u8 *mta_list;
3254         int i;
3255
3256         if (netdev_mc_empty(netdev)) {
3257                 /* nothing to program, so clear mc list */
3258                 hw->mac.ops.update_mc_addr_list(hw, NULL, 0);
3259                 return 0;
3260         }
3261
3262         mta_list = kzalloc(netdev_mc_count(netdev) * ETH_ALEN, GFP_ATOMIC);
3263         if (!mta_list)
3264                 return -ENOMEM;
3265
3266         /* update_mc_addr_list expects a packed array of only addresses. */
3267         i = 0;
3268         netdev_for_each_mc_addr(ha, netdev)
3269             memcpy(mta_list + (i++ * ETH_ALEN), ha->addr, ETH_ALEN);
3270
3271         hw->mac.ops.update_mc_addr_list(hw, mta_list, i);
3272         kfree(mta_list);
3273
3274         return netdev_mc_count(netdev);
3275 }
3276
3277 /**
3278  * e1000e_write_uc_addr_list - write unicast addresses to RAR table
3279  * @netdev: network interface device structure
3280  *
3281  * Writes unicast address list to the RAR table.
3282  * Returns: -ENOMEM on failure/insufficient address space
3283  *                0 on no addresses written
3284  *                X on writing X addresses to the RAR table
3285  **/
3286 static int e1000e_write_uc_addr_list(struct net_device *netdev)
3287 {
3288         struct e1000_adapter *adapter = netdev_priv(netdev);
3289         struct e1000_hw *hw = &adapter->hw;
3290         unsigned int rar_entries = hw->mac.rar_entry_count;
3291         int count = 0;
3292
3293         /* save a rar entry for our hardware address */
3294         rar_entries--;
3295
3296         /* save a rar entry for the LAA workaround */
3297         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA)
3298                 rar_entries--;
3299
3300         /* return ENOMEM indicating insufficient memory for addresses */
3301         if (netdev_uc_count(netdev) > rar_entries)
3302                 return -ENOMEM;
3303
3304         if (!netdev_uc_empty(netdev) && rar_entries) {
3305                 struct netdev_hw_addr *ha;
3306
3307                 /* write the addresses in reverse order to avoid write
3308                  * combining
3309                  */
3310                 netdev_for_each_uc_addr(ha, netdev) {
3311                         if (!rar_entries)
3312                                 break;
3313                         hw->mac.ops.rar_set(hw, ha->addr, rar_entries--);
3314                         count++;
3315                 }
3316         }
3317
3318         /* zero out the remaining RAR entries not used above */
3319         for (; rar_entries > 0; rar_entries--) {
3320                 ew32(RAH(rar_entries), 0);
3321                 ew32(RAL(rar_entries), 0);
3322         }
3323         e1e_flush();
3324
3325         return count;
3326 }
3327
3328 /**
3329  * e1000e_set_rx_mode - secondary unicast, Multicast and Promiscuous mode set
3330  * @netdev: network interface device structure
3331  *
3332  * The ndo_set_rx_mode entry point is called whenever the unicast or multicast
3333  * address list or the network interface flags are updated.  This routine is
3334  * responsible for configuring the hardware for proper unicast, multicast,
3335  * promiscuous mode, and all-multi behavior.
3336  **/
3337 static void e1000e_set_rx_mode(struct net_device *netdev)
3338 {
3339         struct e1000_adapter *adapter = netdev_priv(netdev);
3340         struct e1000_hw *hw = &adapter->hw;
3341         u32 rctl;
3342
3343         /* Check for Promiscuous and All Multicast modes */
3344         rctl = er32(RCTL);
3345
3346         /* clear the affected bits */
3347         rctl &= ~(E1000_RCTL_UPE | E1000_RCTL_MPE);
3348
3349         if (netdev->flags & IFF_PROMISC) {
3350                 rctl |= (E1000_RCTL_UPE | E1000_RCTL_MPE);
3351                 /* Do not hardware filter VLANs in promisc mode */
3352                 e1000e_vlan_filter_disable(adapter);
3353         } else {
3354                 int count;
3355
3356                 if (netdev->flags & IFF_ALLMULTI) {
3357                         rctl |= E1000_RCTL_MPE;
3358                 } else {
3359                         /* Write addresses to the MTA, if the attempt fails
3360                          * then we should just turn on promiscuous mode so
3361                          * that we can at least receive multicast traffic
3362                          */
3363                         count = e1000e_write_mc_addr_list(netdev);
3364                         if (count < 0)
3365                                 rctl |= E1000_RCTL_MPE;
3366                 }
3367                 e1000e_vlan_filter_enable(adapter);
3368                 /* Write addresses to available RAR registers, if there is not
3369                  * sufficient space to store all the addresses then enable
3370                  * unicast promiscuous mode
3371                  */
3372                 count = e1000e_write_uc_addr_list(netdev);
3373                 if (count < 0)
3374                         rctl |= E1000_RCTL_UPE;
3375         }
3376
3377         ew32(RCTL, rctl);
3378
3379         if (netdev->features & NETIF_F_HW_VLAN_CTAG_RX)
3380                 e1000e_vlan_strip_enable(adapter);
3381         else
3382                 e1000e_vlan_strip_disable(adapter);
3383 }
3384
3385 static void e1000e_setup_rss_hash(struct e1000_adapter *adapter)
3386 {
3387         struct e1000_hw *hw = &adapter->hw;
3388         u32 mrqc, rxcsum;
3389         int i;
3390         static const u32 rsskey[10] = {
3391                 0xda565a6d, 0xc20e5b25, 0x3d256741, 0xb08fa343, 0xcb2bcad0,
3392                 0xb4307bae, 0xa32dcb77, 0x0cf23080, 0x3bb7426a, 0xfa01acbe
3393         };
3394
3395         /* Fill out hash function seed */
3396         for (i = 0; i < 10; i++)
3397                 ew32(RSSRK(i), rsskey[i]);
3398
3399         /* Direct all traffic to queue 0 */
3400         for (i = 0; i < 32; i++)
3401                 ew32(RETA(i), 0);
3402
3403         /* Disable raw packet checksumming so that RSS hash is placed in
3404          * descriptor on writeback.
3405          */
3406         rxcsum = er32(RXCSUM);
3407         rxcsum |= E1000_RXCSUM_PCSD;
3408
3409         ew32(RXCSUM, rxcsum);
3410
3411         mrqc = (E1000_MRQC_RSS_FIELD_IPV4 |
3412                 E1000_MRQC_RSS_FIELD_IPV4_TCP |
3413                 E1000_MRQC_RSS_FIELD_IPV6 |
3414                 E1000_MRQC_RSS_FIELD_IPV6_TCP |
3415                 E1000_MRQC_RSS_FIELD_IPV6_TCP_EX);
3416
3417         ew32(MRQC, mrqc);
3418 }
3419
3420 /**
3421  * e1000e_get_base_timinca - get default SYSTIM time increment attributes
3422  * @adapter: board private structure
3423  * @timinca: pointer to returned time increment attributes
3424  *
3425  * Get attributes for incrementing the System Time Register SYSTIML/H at
3426  * the default base frequency, and set the cyclecounter shift value.
3427  **/
3428 s32 e1000e_get_base_timinca(struct e1000_adapter *adapter, u32 *timinca)
3429 {
3430         struct e1000_hw *hw = &adapter->hw;
3431         u32 incvalue, incperiod, shift;
3432
3433         /* Make sure clock is enabled on I217 before checking the frequency */
3434         if ((hw->mac.type == e1000_pch_lpt) &&
3435             !(er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) &&
3436             !(er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_ENABLED)) {
3437                 u32 fextnvm7 = er32(FEXTNVM7);
3438
3439                 if (!(fextnvm7 & (1 << 0))) {
3440                         ew32(FEXTNVM7, fextnvm7 | (1 << 0));
3441                         e1e_flush();
3442                 }
3443         }
3444
3445         switch (hw->mac.type) {
3446         case e1000_pch2lan:
3447         case e1000_pch_lpt:
3448                 /* On I217, the clock frequency is 25MHz or 96MHz as
3449                  * indicated by the System Clock Frequency Indication
3450                  */
3451                 if ((hw->mac.type != e1000_pch_lpt) ||
3452                     (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_SYSCFI)) {
3453                         /* Stable 96MHz frequency */
3454                         incperiod = INCPERIOD_96MHz;
3455                         incvalue = INCVALUE_96MHz;
3456                         shift = INCVALUE_SHIFT_96MHz;
3457                         adapter->cc.shift = shift + INCPERIOD_SHIFT_96MHz;
3458                         break;
3459                 }
3460                 /* fall-through */
3461         case e1000_82574:
3462         case e1000_82583:
3463                 /* Stable 25MHz frequency */
3464                 incperiod = INCPERIOD_25MHz;
3465                 incvalue = INCVALUE_25MHz;
3466                 shift = INCVALUE_SHIFT_25MHz;
3467                 adapter->cc.shift = shift;
3468                 break;
3469         default:
3470                 return -EINVAL;
3471         }
3472
3473         *timinca = ((incperiod << E1000_TIMINCA_INCPERIOD_SHIFT) |
3474                     ((incvalue << shift) & E1000_TIMINCA_INCVALUE_MASK));
3475
3476         return 0;
3477 }
3478
3479 /**
3480  * e1000e_config_hwtstamp - configure the hwtstamp registers and enable/disable
3481  * @adapter: board private structure
3482  *
3483  * Outgoing time stamping can be enabled and disabled. Play nice and
3484  * disable it when requested, although it shouldn't cause any overhead
3485  * when no packet needs it. At most one packet in the queue may be
3486  * marked for time stamping, otherwise it would be impossible to tell
3487  * for sure to which packet the hardware time stamp belongs.
3488  *
3489  * Incoming time stamping has to be configured via the hardware filters.
3490  * Not all combinations are supported, in particular event type has to be
3491  * specified. Matching the kind of event packet is not supported, with the
3492  * exception of "all V2 events regardless of level 2 or 4".
3493  **/
3494 static int e1000e_config_hwtstamp(struct e1000_adapter *adapter)
3495 {
3496         struct e1000_hw *hw = &adapter->hw;
3497         struct hwtstamp_config *config = &adapter->hwtstamp_config;
3498         u32 tsync_tx_ctl = E1000_TSYNCTXCTL_ENABLED;
3499         u32 tsync_rx_ctl = E1000_TSYNCRXCTL_ENABLED;
3500         u32 rxmtrl = 0;
3501         u16 rxudp = 0;
3502         bool is_l4 = false;
3503         bool is_l2 = false;
3504         u32 regval;
3505         s32 ret_val;
3506
3507         if (!(adapter->flags & FLAG_HAS_HW_TIMESTAMP))
3508                 return -EINVAL;
3509
3510         /* flags reserved for future extensions - must be zero */
3511         if (config->flags)
3512                 return -EINVAL;
3513
3514         switch (config->tx_type) {
3515         case HWTSTAMP_TX_OFF:
3516                 tsync_tx_ctl = 0;
3517                 break;
3518         case HWTSTAMP_TX_ON:
3519                 break;
3520         default:
3521                 return -ERANGE;
3522         }
3523
3524         switch (config->rx_filter) {
3525         case HWTSTAMP_FILTER_NONE:
3526                 tsync_rx_ctl = 0;
3527                 break;
3528         case HWTSTAMP_FILTER_PTP_V1_L4_SYNC:
3529                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3530                 rxmtrl = E1000_RXMTRL_PTP_V1_SYNC_MESSAGE;
3531                 is_l4 = true;
3532                 break;
3533         case HWTSTAMP_FILTER_PTP_V1_L4_DELAY_REQ:
3534                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L4_V1;
3535                 rxmtrl = E1000_RXMTRL_PTP_V1_DELAY_REQ_MESSAGE;
3536                 is_l4 = true;
3537                 break;
3538         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
3539                 /* Also time stamps V2 L2 Path Delay Request/Response */
3540                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3541                 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3542                 is_l2 = true;
3543                 break;
3544         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
3545                 /* Also time stamps V2 L2 Path Delay Request/Response. */
3546                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_V2;
3547                 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3548                 is_l2 = true;
3549                 break;
3550         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
3551                 /* Hardware cannot filter just V2 L4 Sync messages;
3552                  * fall-through to V2 (both L2 and L4) Sync.
3553                  */
3554         case HWTSTAMP_FILTER_PTP_V2_SYNC:
3555                 /* Also time stamps V2 Path Delay Request/Response. */
3556                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3557                 rxmtrl = E1000_RXMTRL_PTP_V2_SYNC_MESSAGE;
3558                 is_l2 = true;
3559                 is_l4 = true;
3560                 break;
3561         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
3562                 /* Hardware cannot filter just V2 L4 Delay Request messages;
3563                  * fall-through to V2 (both L2 and L4) Delay Request.
3564                  */
3565         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
3566                 /* Also time stamps V2 Path Delay Request/Response. */
3567                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_L2_L4_V2;
3568                 rxmtrl = E1000_RXMTRL_PTP_V2_DELAY_REQ_MESSAGE;
3569                 is_l2 = true;
3570                 is_l4 = true;
3571                 break;
3572         case HWTSTAMP_FILTER_PTP_V2_L4_EVENT:
3573         case HWTSTAMP_FILTER_PTP_V2_L2_EVENT:
3574                 /* Hardware cannot filter just V2 L4 or L2 Event messages;
3575                  * fall-through to all V2 (both L2 and L4) Events.
3576                  */
3577         case HWTSTAMP_FILTER_PTP_V2_EVENT:
3578                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_EVENT_V2;
3579                 config->rx_filter = HWTSTAMP_FILTER_PTP_V2_EVENT;
3580                 is_l2 = true;
3581                 is_l4 = true;
3582                 break;
3583         case HWTSTAMP_FILTER_PTP_V1_L4_EVENT:
3584                 /* For V1, the hardware can only filter Sync messages or
3585                  * Delay Request messages but not both so fall-through to
3586                  * time stamp all packets.
3587                  */
3588         case HWTSTAMP_FILTER_ALL:
3589                 is_l2 = true;
3590                 is_l4 = true;
3591                 tsync_rx_ctl |= E1000_TSYNCRXCTL_TYPE_ALL;
3592                 config->rx_filter = HWTSTAMP_FILTER_ALL;
3593                 break;
3594         default:
3595                 return -ERANGE;
3596         }
3597
3598         /* enable/disable Tx h/w time stamping */
3599         regval = er32(TSYNCTXCTL);
3600         regval &= ~E1000_TSYNCTXCTL_ENABLED;
3601         regval |= tsync_tx_ctl;
3602         ew32(TSYNCTXCTL, regval);
3603         if ((er32(TSYNCTXCTL) & E1000_TSYNCTXCTL_ENABLED) !=
3604             (regval & E1000_TSYNCTXCTL_ENABLED)) {
3605                 e_err("Timesync Tx Control register not set as expected\n");
3606                 return -EAGAIN;
3607         }
3608
3609         /* enable/disable Rx h/w time stamping */
3610         regval = er32(TSYNCRXCTL);
3611         regval &= ~(E1000_TSYNCRXCTL_ENABLED | E1000_TSYNCRXCTL_TYPE_MASK);
3612         regval |= tsync_rx_ctl;
3613         ew32(TSYNCRXCTL, regval);
3614         if ((er32(TSYNCRXCTL) & (E1000_TSYNCRXCTL_ENABLED |
3615                                  E1000_TSYNCRXCTL_TYPE_MASK)) !=
3616             (regval & (E1000_TSYNCRXCTL_ENABLED |
3617                        E1000_TSYNCRXCTL_TYPE_MASK))) {
3618                 e_err("Timesync Rx Control register not set as expected\n");
3619                 return -EAGAIN;
3620         }
3621
3622         /* L2: define ethertype filter for time stamped packets */
3623         if (is_l2)
3624                 rxmtrl |= ETH_P_1588;
3625
3626         /* define which PTP packets get time stamped */
3627         ew32(RXMTRL, rxmtrl);
3628
3629         /* Filter by destination port */
3630         if (is_l4) {
3631                 rxudp = PTP_EV_PORT;
3632                 cpu_to_be16s(&rxudp);
3633         }
3634         ew32(RXUDP, rxudp);
3635
3636         e1e_flush();
3637
3638         /* Clear TSYNCRXCTL_VALID & TSYNCTXCTL_VALID bit */
3639         er32(RXSTMPH);
3640         er32(TXSTMPH);
3641
3642         /* Get and set the System Time Register SYSTIM base frequency */
3643         ret_val = e1000e_get_base_timinca(adapter, &regval);
3644         if (ret_val)
3645                 return ret_val;
3646         ew32(TIMINCA, regval);
3647
3648         /* reset the ns time counter */
3649         timecounter_init(&adapter->tc, &adapter->cc,
3650                          ktime_to_ns(ktime_get_real()));
3651
3652         return 0;
3653 }
3654
3655 /**
3656  * e1000_configure - configure the hardware for Rx and Tx
3657  * @adapter: private board structure
3658  **/
3659 static void e1000_configure(struct e1000_adapter *adapter)
3660 {
3661         struct e1000_ring *rx_ring = adapter->rx_ring;
3662
3663         e1000e_set_rx_mode(adapter->netdev);
3664
3665         e1000_restore_vlan(adapter);
3666         e1000_init_manageability_pt(adapter);
3667
3668         e1000_configure_tx(adapter);
3669
3670         if (adapter->netdev->features & NETIF_F_RXHASH)
3671                 e1000e_setup_rss_hash(adapter);
3672         e1000_setup_rctl(adapter);
3673         e1000_configure_rx(adapter);
3674         adapter->alloc_rx_buf(rx_ring, e1000_desc_unused(rx_ring), GFP_KERNEL);
3675 }
3676
3677 /**
3678  * e1000e_power_up_phy - restore link in case the phy was powered down
3679  * @adapter: address of board private structure
3680  *
3681  * The phy may be powered down to save power and turn off link when the
3682  * driver is unloaded and wake on lan is not enabled (among others)
3683  * *** this routine MUST be followed by a call to e1000e_reset ***
3684  **/
3685 void e1000e_power_up_phy(struct e1000_adapter *adapter)
3686 {
3687         if (adapter->hw.phy.ops.power_up)
3688                 adapter->hw.phy.ops.power_up(&adapter->hw);
3689
3690         adapter->hw.mac.ops.setup_link(&adapter->hw);
3691 }
3692
3693 /**
3694  * e1000_power_down_phy - Power down the PHY
3695  *
3696  * Power down the PHY so no link is implied when interface is down.
3697  * The PHY cannot be powered down if management or WoL is active.
3698  */
3699 static void e1000_power_down_phy(struct e1000_adapter *adapter)
3700 {
3701         /* WoL is enabled */
3702         if (adapter->wol)
3703                 return;
3704
3705         if (adapter->hw.phy.ops.power_down)
3706                 adapter->hw.phy.ops.power_down(&adapter->hw);
3707 }
3708
3709 /**
3710  * e1000e_reset - bring the hardware into a known good state
3711  *
3712  * This function boots the hardware and enables some settings that
3713  * require a configuration cycle of the hardware - those cannot be
3714  * set/changed during runtime. After reset the device needs to be
3715  * properly configured for Rx, Tx etc.
3716  */
3717 void e1000e_reset(struct e1000_adapter *adapter)
3718 {
3719         struct e1000_mac_info *mac = &adapter->hw.mac;
3720         struct e1000_fc_info *fc = &adapter->hw.fc;
3721         struct e1000_hw *hw = &adapter->hw;
3722         u32 tx_space, min_tx_space, min_rx_space;
3723         u32 pba = adapter->pba;
3724         u16 hwm;
3725
3726         /* reset Packet Buffer Allocation to default */
3727         ew32(PBA, pba);
3728
3729         if (adapter->max_frame_size > ETH_FRAME_LEN + ETH_FCS_LEN) {
3730                 /* To maintain wire speed transmits, the Tx FIFO should be
3731                  * large enough to accommodate two full transmit packets,
3732                  * rounded up to the next 1KB and expressed in KB.  Likewise,
3733                  * the Rx FIFO should be large enough to accommodate at least
3734                  * one full receive packet and is similarly rounded up and
3735                  * expressed in KB.
3736                  */
3737                 pba = er32(PBA);
3738                 /* upper 16 bits has Tx packet buffer allocation size in KB */
3739                 tx_space = pba >> 16;
3740                 /* lower 16 bits has Rx packet buffer allocation size in KB */
3741                 pba &= 0xffff;
3742                 /* the Tx fifo also stores 16 bytes of information about the Tx
3743                  * but don't include ethernet FCS because hardware appends it
3744                  */
3745                 min_tx_space = (adapter->max_frame_size +
3746                                 sizeof(struct e1000_tx_desc) - ETH_FCS_LEN) * 2;
3747                 min_tx_space = ALIGN(min_tx_space, 1024);
3748                 min_tx_space >>= 10;
3749                 /* software strips receive CRC, so leave room for it */
3750                 min_rx_space = adapter->max_frame_size;
3751                 min_rx_space = ALIGN(min_rx_space, 1024);
3752                 min_rx_space >>= 10;
3753
3754                 /* If current Tx allocation is less than the min Tx FIFO size,
3755                  * and the min Tx FIFO size is less than the current Rx FIFO
3756                  * allocation, take space away from current Rx allocation
3757                  */
3758                 if ((tx_space < min_tx_space) &&
3759                     ((min_tx_space - tx_space) < pba)) {
3760                         pba -= min_tx_space - tx_space;
3761
3762                         /* if short on Rx space, Rx wins and must trump Tx
3763                          * adjustment
3764                          */
3765                         if (pba < min_rx_space)
3766                                 pba = min_rx_space;
3767                 }
3768
3769                 ew32(PBA, pba);
3770         }
3771
3772         /* flow control settings
3773          *
3774          * The high water mark must be low enough to fit one full frame
3775          * (or the size used for early receive) above it in the Rx FIFO.
3776          * Set it to the lower of:
3777          * - 90% of the Rx FIFO size, and
3778          * - the full Rx FIFO size minus one full frame
3779          */
3780         if (adapter->flags & FLAG_DISABLE_FC_PAUSE_TIME)
3781                 fc->pause_time = 0xFFFF;
3782         else
3783                 fc->pause_time = E1000_FC_PAUSE_TIME;
3784         fc->send_xon = true;
3785         fc->current_mode = fc->requested_mode;
3786
3787         switch (hw->mac.type) {
3788         case e1000_ich9lan:
3789         case e1000_ich10lan:
3790                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3791                         pba = 14;
3792                         ew32(PBA, pba);
3793                         fc->high_water = 0x2800;
3794                         fc->low_water = fc->high_water - 8;
3795                         break;
3796                 }
3797                 /* fall-through */
3798         default:
3799                 hwm = min(((pba << 10) * 9 / 10),
3800                           ((pba << 10) - adapter->max_frame_size));
3801
3802                 fc->high_water = hwm & E1000_FCRTH_RTH; /* 8-byte granularity */
3803                 fc->low_water = fc->high_water - 8;
3804                 break;
3805         case e1000_pchlan:
3806                 /* Workaround PCH LOM adapter hangs with certain network
3807                  * loads.  If hangs persist, try disabling Tx flow control.
3808                  */
3809                 if (adapter->netdev->mtu > ETH_DATA_LEN) {
3810                         fc->high_water = 0x3500;
3811                         fc->low_water = 0x1500;
3812                 } else {
3813                         fc->high_water = 0x5000;
3814                         fc->low_water = 0x3000;
3815                 }
3816                 fc->refresh_time = 0x1000;
3817                 break;
3818         case e1000_pch2lan:
3819         case e1000_pch_lpt:
3820                 fc->refresh_time = 0x0400;
3821
3822                 if (adapter->netdev->mtu <= ETH_DATA_LEN) {
3823                         fc->high_water = 0x05C20;
3824                         fc->low_water = 0x05048;
3825                         fc->pause_time = 0x0650;
3826                         break;
3827                 }
3828
3829                 fc->high_water = ((pba << 10) * 9 / 10) & E1000_FCRTH_RTH;
3830                 fc->low_water = ((pba << 10) * 8 / 10) & E1000_FCRTL_RTL;
3831                 break;
3832         }
3833
3834         /* Alignment of Tx data is on an arbitrary byte boundary with the
3835          * maximum size per Tx descriptor limited only to the transmit
3836          * allocation of the packet buffer minus 96 bytes with an upper
3837          * limit of 24KB due to receive synchronization limitations.
3838          */
3839         adapter->tx_fifo_limit = min_t(u32, ((er32(PBA) >> 16) << 10) - 96,
3840                                        24 << 10);
3841
3842         /* Disable Adaptive Interrupt Moderation if 2 full packets cannot
3843          * fit in receive buffer.
3844          */
3845         if (adapter->itr_setting & 0x3) {
3846                 if ((adapter->max_frame_size * 2) > (pba << 10)) {
3847                         if (!(adapter->flags2 & FLAG2_DISABLE_AIM)) {
3848                                 dev_info(&adapter->pdev->dev,
3849                                          "Interrupt Throttle Rate off\n");
3850                                 adapter->flags2 |= FLAG2_DISABLE_AIM;
3851                                 e1000e_write_itr(adapter, 0);
3852                         }
3853                 } else if (adapter->flags2 & FLAG2_DISABLE_AIM) {
3854                         dev_info(&adapter->pdev->dev,
3855                                  "Interrupt Throttle Rate on\n");
3856                         adapter->flags2 &= ~FLAG2_DISABLE_AIM;
3857                         adapter->itr = 20000;
3858                         e1000e_write_itr(adapter, adapter->itr);
3859                 }
3860         }
3861
3862         /* Allow time for pending master requests to run */
3863         mac->ops.reset_hw(hw);
3864
3865         /* For parts with AMT enabled, let the firmware know
3866          * that the network interface is in control
3867          */
3868         if (adapter->flags & FLAG_HAS_AMT)
3869                 e1000e_get_hw_control(adapter);
3870
3871         ew32(WUC, 0);
3872
3873         if (mac->ops.init_hw(hw))
3874                 e_err("Hardware Error\n");
3875
3876         e1000_update_mng_vlan(adapter);
3877
3878         /* Enable h/w to recognize an 802.1Q VLAN Ethernet packet */
3879         ew32(VET, ETH_P_8021Q);
3880
3881         e1000e_reset_adaptive(hw);
3882
3883         /* initialize systim and reset the ns time counter */
3884         e1000e_config_hwtstamp(adapter);
3885
3886         /* Set EEE advertisement as appropriate */
3887         if (adapter->flags2 & FLAG2_HAS_EEE) {
3888                 s32 ret_val;
3889                 u16 adv_addr;
3890
3891                 switch (hw->phy.type) {
3892                 case e1000_phy_82579:
3893                         adv_addr = I82579_EEE_ADVERTISEMENT;
3894                         break;
3895                 case e1000_phy_i217:
3896                         adv_addr = I217_EEE_ADVERTISEMENT;
3897                         break;
3898                 default:
3899                         dev_err(&adapter->pdev->dev,
3900                                 "Invalid PHY type setting EEE advertisement\n");
3901                         return;
3902                 }
3903
3904                 ret_val = hw->phy.ops.acquire(hw);
3905                 if (ret_val) {
3906                         dev_err(&adapter->pdev->dev,
3907                                 "EEE advertisement - unable to acquire PHY\n");
3908                         return;
3909                 }
3910
3911                 e1000_write_emi_reg_locked(hw, adv_addr,
3912                                            hw->dev_spec.ich8lan.eee_disable ?
3913                                            0 : adapter->eee_advert);
3914
3915                 hw->phy.ops.release(hw);
3916         }
3917
3918         if (!netif_running(adapter->netdev) &&
3919             !test_bit(__E1000_TESTING, &adapter->state)) {
3920                 e1000_power_down_phy(adapter);
3921                 return;
3922         }
3923
3924         e1000_get_phy_info(hw);
3925
3926         if ((adapter->flags & FLAG_HAS_SMART_POWER_DOWN) &&
3927             !(adapter->flags & FLAG_SMART_POWER_DOWN)) {
3928                 u16 phy_data = 0;
3929                 /* speed up time to link by disabling smart power down, ignore
3930                  * the return value of this function because there is nothing
3931                  * different we would do if it failed
3932                  */
3933                 e1e_rphy(hw, IGP02E1000_PHY_POWER_MGMT, &phy_data);
3934                 phy_data &= ~IGP02E1000_PM_SPD;
3935                 e1e_wphy(hw, IGP02E1000_PHY_POWER_MGMT, phy_data);
3936         }
3937 }
3938
3939 int e1000e_up(struct e1000_adapter *adapter)
3940 {
3941         struct e1000_hw *hw = &adapter->hw;
3942
3943         /* hardware has been reset, we need to reload some things */
3944         e1000_configure(adapter);
3945
3946         clear_bit(__E1000_DOWN, &adapter->state);
3947
3948         if (adapter->msix_entries)
3949                 e1000_configure_msix(adapter);
3950         e1000_irq_enable(adapter);
3951
3952         netif_start_queue(adapter->netdev);
3953
3954         /* fire a link change interrupt to start the watchdog */
3955         if (adapter->msix_entries)
3956                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
3957         else
3958                 ew32(ICS, E1000_ICS_LSC);
3959
3960         return 0;
3961 }
3962
3963 static void e1000e_flush_descriptors(struct e1000_adapter *adapter)
3964 {
3965         struct e1000_hw *hw = &adapter->hw;
3966
3967         if (!(adapter->flags2 & FLAG2_DMA_BURST))
3968                 return;
3969
3970         /* flush pending descriptor writebacks to memory */
3971         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3972         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3973
3974         /* execute the writes immediately */
3975         e1e_flush();
3976
3977         /* due to rare timing issues, write to TIDV/RDTR again to ensure the
3978          * write is successful
3979          */
3980         ew32(TIDV, adapter->tx_int_delay | E1000_TIDV_FPD);
3981         ew32(RDTR, adapter->rx_int_delay | E1000_RDTR_FPD);
3982
3983         /* execute the writes immediately */
3984         e1e_flush();
3985 }
3986
3987 static void e1000e_update_stats(struct e1000_adapter *adapter);
3988
3989 void e1000e_down(struct e1000_adapter *adapter)
3990 {
3991         struct net_device *netdev = adapter->netdev;
3992         struct e1000_hw *hw = &adapter->hw;
3993         u32 tctl, rctl;
3994
3995         /* signal that we're down so the interrupt handler does not
3996          * reschedule our watchdog timer
3997          */
3998         set_bit(__E1000_DOWN, &adapter->state);
3999
4000         /* disable receives in the hardware */
4001         rctl = er32(RCTL);
4002         if (!(adapter->flags2 & FLAG2_NO_DISABLE_RX))
4003                 ew32(RCTL, rctl & ~E1000_RCTL_EN);
4004         /* flush and sleep below */
4005
4006         netif_stop_queue(netdev);
4007
4008         /* disable transmits in the hardware */
4009         tctl = er32(TCTL);
4010         tctl &= ~E1000_TCTL_EN;
4011         ew32(TCTL, tctl);
4012
4013         /* flush both disables and wait for them to finish */
4014         e1e_flush();
4015         usleep_range(10000, 20000);
4016
4017         e1000_irq_disable(adapter);
4018
4019         napi_synchronize(&adapter->napi);
4020
4021         del_timer_sync(&adapter->watchdog_timer);
4022         del_timer_sync(&adapter->phy_info_timer);
4023
4024         netif_carrier_off(netdev);
4025
4026         spin_lock(&adapter->stats64_lock);
4027         e1000e_update_stats(adapter);
4028         spin_unlock(&adapter->stats64_lock);
4029
4030         e1000e_flush_descriptors(adapter);
4031         e1000_clean_tx_ring(adapter->tx_ring);
4032         e1000_clean_rx_ring(adapter->rx_ring);
4033
4034         adapter->link_speed = 0;
4035         adapter->link_duplex = 0;
4036
4037         if (!pci_channel_offline(adapter->pdev))
4038                 e1000e_reset(adapter);
4039
4040         /* TODO: for power management, we could drop the link and
4041          * pci_disable_device here.
4042          */
4043 }
4044
4045 void e1000e_reinit_locked(struct e1000_adapter *adapter)
4046 {
4047         might_sleep();
4048         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
4049                 usleep_range(1000, 2000);
4050         e1000e_down(adapter);
4051         e1000e_up(adapter);
4052         clear_bit(__E1000_RESETTING, &adapter->state);
4053 }
4054
4055 /**
4056  * e1000e_cyclecounter_read - read raw cycle counter (used by time counter)
4057  * @cc: cyclecounter structure
4058  **/
4059 static cycle_t e1000e_cyclecounter_read(const struct cyclecounter *cc)
4060 {
4061         struct e1000_adapter *adapter = container_of(cc, struct e1000_adapter,
4062                                                      cc);
4063         struct e1000_hw *hw = &adapter->hw;
4064         cycle_t systim;
4065
4066         /* latch SYSTIMH on read of SYSTIML */
4067         systim = (cycle_t)er32(SYSTIML);
4068         systim |= (cycle_t)er32(SYSTIMH) << 32;
4069
4070         return systim;
4071 }
4072
4073 /**
4074  * e1000_sw_init - Initialize general software structures (struct e1000_adapter)
4075  * @adapter: board private structure to initialize
4076  *
4077  * e1000_sw_init initializes the Adapter private data structure.
4078  * Fields are initialized based on PCI device information and
4079  * OS network device settings (MTU size).
4080  **/
4081 static int e1000_sw_init(struct e1000_adapter *adapter)
4082 {
4083         struct net_device *netdev = adapter->netdev;
4084
4085         adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN;
4086         adapter->rx_ps_bsize0 = 128;
4087         adapter->max_frame_size = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
4088         adapter->min_frame_size = ETH_ZLEN + ETH_FCS_LEN;
4089         adapter->tx_ring_count = E1000_DEFAULT_TXD;
4090         adapter->rx_ring_count = E1000_DEFAULT_RXD;
4091
4092         spin_lock_init(&adapter->stats64_lock);
4093
4094         e1000e_set_interrupt_capability(adapter);
4095
4096         if (e1000_alloc_queues(adapter))
4097                 return -ENOMEM;
4098
4099         /* Setup hardware time stamping cyclecounter */
4100         if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
4101                 adapter->cc.read = e1000e_cyclecounter_read;
4102                 adapter->cc.mask = CLOCKSOURCE_MASK(64);
4103                 adapter->cc.mult = 1;
4104                 /* cc.shift set in e1000e_get_base_tininca() */
4105
4106                 spin_lock_init(&adapter->systim_lock);
4107                 INIT_WORK(&adapter->tx_hwtstamp_work, e1000e_tx_hwtstamp_work);
4108         }
4109
4110         /* Explicitly disable IRQ since the NIC can be in any state. */
4111         e1000_irq_disable(adapter);
4112
4113         set_bit(__E1000_DOWN, &adapter->state);
4114         return 0;
4115 }
4116
4117 /**
4118  * e1000_intr_msi_test - Interrupt Handler
4119  * @irq: interrupt number
4120  * @data: pointer to a network interface device structure
4121  **/
4122 static irqreturn_t e1000_intr_msi_test(int __always_unused irq, void *data)
4123 {
4124         struct net_device *netdev = data;
4125         struct e1000_adapter *adapter = netdev_priv(netdev);
4126         struct e1000_hw *hw = &adapter->hw;
4127         u32 icr = er32(ICR);
4128
4129         e_dbg("icr is %08X\n", icr);
4130         if (icr & E1000_ICR_RXSEQ) {
4131                 adapter->flags &= ~FLAG_MSI_TEST_FAILED;
4132                 /* Force memory writes to complete before acknowledging the
4133                  * interrupt is handled.
4134                  */
4135                 wmb();
4136         }
4137
4138         return IRQ_HANDLED;
4139 }
4140
4141 /**
4142  * e1000_test_msi_interrupt - Returns 0 for successful test
4143  * @adapter: board private struct
4144  *
4145  * code flow taken from tg3.c
4146  **/
4147 static int e1000_test_msi_interrupt(struct e1000_adapter *adapter)
4148 {
4149         struct net_device *netdev = adapter->netdev;
4150         struct e1000_hw *hw = &adapter->hw;
4151         int err;
4152
4153         /* poll_enable hasn't been called yet, so don't need disable */
4154         /* clear any pending events */
4155         er32(ICR);
4156
4157         /* free the real vector and request a test handler */
4158         e1000_free_irq(adapter);
4159         e1000e_reset_interrupt_capability(adapter);
4160
4161         /* Assume that the test fails, if it succeeds then the test
4162          * MSI irq handler will unset this flag
4163          */
4164         adapter->flags |= FLAG_MSI_TEST_FAILED;
4165
4166         err = pci_enable_msi(adapter->pdev);
4167         if (err)
4168                 goto msi_test_failed;
4169
4170         err = request_irq(adapter->pdev->irq, e1000_intr_msi_test, 0,
4171                           netdev->name, netdev);
4172         if (err) {
4173                 pci_disable_msi(adapter->pdev);
4174                 goto msi_test_failed;
4175         }
4176
4177         /* Force memory writes to complete before enabling and firing an
4178          * interrupt.
4179          */
4180         wmb();
4181
4182         e1000_irq_enable(adapter);
4183
4184         /* fire an unusual interrupt on the test handler */
4185         ew32(ICS, E1000_ICS_RXSEQ);
4186         e1e_flush();
4187         msleep(100);
4188
4189         e1000_irq_disable(adapter);
4190
4191         rmb();                  /* read flags after interrupt has been fired */
4192
4193         if (adapter->flags & FLAG_MSI_TEST_FAILED) {
4194                 adapter->int_mode = E1000E_INT_MODE_LEGACY;
4195                 e_info("MSI interrupt test failed, using legacy interrupt.\n");
4196         } else {
4197                 e_dbg("MSI interrupt test succeeded!\n");
4198         }
4199
4200         free_irq(adapter->pdev->irq, netdev);
4201         pci_disable_msi(adapter->pdev);
4202
4203 msi_test_failed:
4204         e1000e_set_interrupt_capability(adapter);
4205         return e1000_request_irq(adapter);
4206 }
4207
4208 /**
4209  * e1000_test_msi - Returns 0 if MSI test succeeds or INTx mode is restored
4210  * @adapter: board private struct
4211  *
4212  * code flow taken from tg3.c, called with e1000 interrupts disabled.
4213  **/
4214 static int e1000_test_msi(struct e1000_adapter *adapter)
4215 {
4216         int err;
4217         u16 pci_cmd;
4218
4219         if (!(adapter->flags & FLAG_MSI_ENABLED))
4220                 return 0;
4221
4222         /* disable SERR in case the MSI write causes a master abort */
4223         pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4224         if (pci_cmd & PCI_COMMAND_SERR)
4225                 pci_write_config_word(adapter->pdev, PCI_COMMAND,
4226                                       pci_cmd & ~PCI_COMMAND_SERR);
4227
4228         err = e1000_test_msi_interrupt(adapter);
4229
4230         /* re-enable SERR */
4231         if (pci_cmd & PCI_COMMAND_SERR) {
4232                 pci_read_config_word(adapter->pdev, PCI_COMMAND, &pci_cmd);
4233                 pci_cmd |= PCI_COMMAND_SERR;
4234                 pci_write_config_word(adapter->pdev, PCI_COMMAND, pci_cmd);
4235         }
4236
4237         return err;
4238 }
4239
4240 /**
4241  * e1000_open - Called when a network interface is made active
4242  * @netdev: network interface device structure
4243  *
4244  * Returns 0 on success, negative value on failure
4245  *
4246  * The open entry point is called when a network interface is made
4247  * active by the system (IFF_UP).  At this point all resources needed
4248  * for transmit and receive operations are allocated, the interrupt
4249  * handler is registered with the OS, the watchdog timer is started,
4250  * and the stack is notified that the interface is ready.
4251  **/
4252 static int e1000_open(struct net_device *netdev)
4253 {
4254         struct e1000_adapter *adapter = netdev_priv(netdev);
4255         struct e1000_hw *hw = &adapter->hw;
4256         struct pci_dev *pdev = adapter->pdev;
4257         int err;
4258
4259         /* disallow open during test */
4260         if (test_bit(__E1000_TESTING, &adapter->state))
4261                 return -EBUSY;
4262
4263         pm_runtime_get_sync(&pdev->dev);
4264
4265         netif_carrier_off(netdev);
4266
4267         /* allocate transmit descriptors */
4268         err = e1000e_setup_tx_resources(adapter->tx_ring);
4269         if (err)
4270                 goto err_setup_tx;
4271
4272         /* allocate receive descriptors */
4273         err = e1000e_setup_rx_resources(adapter->rx_ring);
4274         if (err)
4275                 goto err_setup_rx;
4276
4277         /* If AMT is enabled, let the firmware know that the network
4278          * interface is now open and reset the part to a known state.
4279          */
4280         if (adapter->flags & FLAG_HAS_AMT) {
4281                 e1000e_get_hw_control(adapter);
4282                 e1000e_reset(adapter);
4283         }
4284
4285         e1000e_power_up_phy(adapter);
4286
4287         adapter->mng_vlan_id = E1000_MNG_VLAN_NONE;
4288         if ((adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN))
4289                 e1000_update_mng_vlan(adapter);
4290
4291         /* DMA latency requirement to workaround jumbo issue */
4292         pm_qos_add_request(&adapter->netdev->pm_qos_req, PM_QOS_CPU_DMA_LATENCY,
4293                            PM_QOS_DEFAULT_VALUE);
4294
4295         /* before we allocate an interrupt, we must be ready to handle it.
4296          * Setting DEBUG_SHIRQ in the kernel makes it fire an interrupt
4297          * as soon as we call pci_request_irq, so we have to setup our
4298          * clean_rx handler before we do so.
4299          */
4300         e1000_configure(adapter);
4301
4302         err = e1000_request_irq(adapter);
4303         if (err)
4304                 goto err_req_irq;
4305
4306         /* Work around PCIe errata with MSI interrupts causing some chipsets to
4307          * ignore e1000e MSI messages, which means we need to test our MSI
4308          * interrupt now
4309          */
4310         if (adapter->int_mode != E1000E_INT_MODE_LEGACY) {
4311                 err = e1000_test_msi(adapter);
4312                 if (err) {
4313                         e_err("Interrupt allocation failed\n");
4314                         goto err_req_irq;
4315                 }
4316         }
4317
4318         /* From here on the code is the same as e1000e_up() */
4319         clear_bit(__E1000_DOWN, &adapter->state);
4320
4321         napi_enable(&adapter->napi);
4322
4323         e1000_irq_enable(adapter);
4324
4325         adapter->tx_hang_recheck = false;
4326         netif_start_queue(netdev);
4327
4328         adapter->idle_check = true;
4329         hw->mac.get_link_status = true;
4330         pm_runtime_put(&pdev->dev);
4331
4332         /* fire a link status change interrupt to start the watchdog */
4333         if (adapter->msix_entries)
4334                 ew32(ICS, E1000_ICS_LSC | E1000_ICR_OTHER);
4335         else
4336                 ew32(ICS, E1000_ICS_LSC);
4337
4338         return 0;
4339
4340 err_req_irq:
4341         e1000e_release_hw_control(adapter);
4342         e1000_power_down_phy(adapter);
4343         e1000e_free_rx_resources(adapter->rx_ring);
4344 err_setup_rx:
4345         e1000e_free_tx_resources(adapter->tx_ring);
4346 err_setup_tx:
4347         e1000e_reset(adapter);
4348         pm_runtime_put_sync(&pdev->dev);
4349
4350         return err;
4351 }
4352
4353 /**
4354  * e1000_close - Disables a network interface
4355  * @netdev: network interface device structure
4356  *
4357  * Returns 0, this is not allowed to fail
4358  *
4359  * The close entry point is called when an interface is de-activated
4360  * by the OS.  The hardware is still under the drivers control, but
4361  * needs to be disabled.  A global MAC reset is issued to stop the
4362  * hardware, and all transmit and receive resources are freed.
4363  **/
4364 static int e1000_close(struct net_device *netdev)
4365 {
4366         struct e1000_adapter *adapter = netdev_priv(netdev);
4367         struct pci_dev *pdev = adapter->pdev;
4368         int count = E1000_CHECK_RESET_COUNT;
4369
4370         while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
4371                 usleep_range(10000, 20000);
4372
4373         WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
4374
4375         pm_runtime_get_sync(&pdev->dev);
4376
4377         if (!test_bit(__E1000_DOWN, &adapter->state)) {
4378                 e1000e_down(adapter);
4379                 e1000_free_irq(adapter);
4380         }
4381
4382         napi_disable(&adapter->napi);
4383
4384         e1000_power_down_phy(adapter);
4385
4386         e1000e_free_tx_resources(adapter->tx_ring);
4387         e1000e_free_rx_resources(adapter->rx_ring);
4388
4389         /* kill manageability vlan ID if supported, but not if a vlan with
4390          * the same ID is registered on the host OS (let 8021q kill it)
4391          */
4392         if (adapter->hw.mng_cookie.status & E1000_MNG_DHCP_COOKIE_STATUS_VLAN)
4393                 e1000_vlan_rx_kill_vid(netdev, htons(ETH_P_8021Q),
4394                                        adapter->mng_vlan_id);
4395
4396         /* If AMT is enabled, let the firmware know that the network
4397          * interface is now closed
4398          */
4399         if ((adapter->flags & FLAG_HAS_AMT) &&
4400             !test_bit(__E1000_TESTING, &adapter->state))
4401                 e1000e_release_hw_control(adapter);
4402
4403         pm_qos_remove_request(&adapter->netdev->pm_qos_req);
4404
4405         pm_runtime_put_sync(&pdev->dev);
4406
4407         return 0;
4408 }
4409
4410 /**
4411  * e1000_set_mac - Change the Ethernet Address of the NIC
4412  * @netdev: network interface device structure
4413  * @p: pointer to an address structure
4414  *
4415  * Returns 0 on success, negative on failure
4416  **/
4417 static int e1000_set_mac(struct net_device *netdev, void *p)
4418 {
4419         struct e1000_adapter *adapter = netdev_priv(netdev);
4420         struct e1000_hw *hw = &adapter->hw;
4421         struct sockaddr *addr = p;
4422
4423         if (!is_valid_ether_addr(addr->sa_data))
4424                 return -EADDRNOTAVAIL;
4425
4426         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
4427         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
4428
4429         hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr, 0);
4430
4431         if (adapter->flags & FLAG_RESET_OVERWRITES_LAA) {
4432                 /* activate the work around */
4433                 e1000e_set_laa_state_82571(&adapter->hw, 1);
4434
4435                 /* Hold a copy of the LAA in RAR[14] This is done so that
4436                  * between the time RAR[0] gets clobbered  and the time it
4437                  * gets fixed (in e1000_watchdog), the actual LAA is in one
4438                  * of the RARs and no incoming packets directed to this port
4439                  * are dropped. Eventually the LAA will be in RAR[0] and
4440                  * RAR[14]
4441                  */
4442                 hw->mac.ops.rar_set(&adapter->hw, adapter->hw.mac.addr,
4443                                     adapter->hw.mac.rar_entry_count - 1);
4444         }
4445
4446         return 0;
4447 }
4448
4449 /**
4450  * e1000e_update_phy_task - work thread to update phy
4451  * @work: pointer to our work struct
4452  *
4453  * this worker thread exists because we must acquire a
4454  * semaphore to read the phy, which we could msleep while
4455  * waiting for it, and we can't msleep in a timer.
4456  **/
4457 static void e1000e_update_phy_task(struct work_struct *work)
4458 {
4459         struct e1000_adapter *adapter = container_of(work,
4460                                                      struct e1000_adapter,
4461                                                      update_phy_task);
4462
4463         if (test_bit(__E1000_DOWN, &adapter->state))
4464                 return;
4465
4466         e1000_get_phy_info(&adapter->hw);
4467 }
4468
4469 /**
4470  * e1000_update_phy_info - timre call-back to update PHY info
4471  * @data: pointer to adapter cast into an unsigned long
4472  *
4473  * Need to wait a few seconds after link up to get diagnostic information from
4474  * the phy
4475  **/
4476 static void e1000_update_phy_info(unsigned long data)
4477 {
4478         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
4479
4480         if (test_bit(__E1000_DOWN, &adapter->state))
4481                 return;
4482
4483         schedule_work(&adapter->update_phy_task);
4484 }
4485
4486 /**
4487  * e1000e_update_phy_stats - Update the PHY statistics counters
4488  * @adapter: board private structure
4489  *
4490  * Read/clear the upper 16-bit PHY registers and read/accumulate lower
4491  **/
4492 static void e1000e_update_phy_stats(struct e1000_adapter *adapter)
4493 {
4494         struct e1000_hw *hw = &adapter->hw;
4495         s32 ret_val;
4496         u16 phy_data;
4497
4498         ret_val = hw->phy.ops.acquire(hw);
4499         if (ret_val)
4500                 return;
4501
4502         /* A page set is expensive so check if already on desired page.
4503          * If not, set to the page with the PHY status registers.
4504          */
4505         hw->phy.addr = 1;
4506         ret_val = e1000e_read_phy_reg_mdic(hw, IGP01E1000_PHY_PAGE_SELECT,
4507                                            &phy_data);
4508         if (ret_val)
4509                 goto release;
4510         if (phy_data != (HV_STATS_PAGE << IGP_PAGE_SHIFT)) {
4511                 ret_val = hw->phy.ops.set_page(hw,
4512                                                HV_STATS_PAGE << IGP_PAGE_SHIFT);
4513                 if (ret_val)
4514                         goto release;
4515         }
4516
4517         /* Single Collision Count */
4518         hw->phy.ops.read_reg_page(hw, HV_SCC_UPPER, &phy_data);
4519         ret_val = hw->phy.ops.read_reg_page(hw, HV_SCC_LOWER, &phy_data);
4520         if (!ret_val)
4521                 adapter->stats.scc += phy_data;
4522
4523         /* Excessive Collision Count */
4524         hw->phy.ops.read_reg_page(hw, HV_ECOL_UPPER, &phy_data);
4525         ret_val = hw->phy.ops.read_reg_page(hw, HV_ECOL_LOWER, &phy_data);
4526         if (!ret_val)
4527                 adapter->stats.ecol += phy_data;
4528
4529         /* Multiple Collision Count */
4530         hw->phy.ops.read_reg_page(hw, HV_MCC_UPPER, &phy_data);
4531         ret_val = hw->phy.ops.read_reg_page(hw, HV_MCC_LOWER, &phy_data);
4532         if (!ret_val)
4533                 adapter->stats.mcc += phy_data;
4534
4535         /* Late Collision Count */
4536         hw->phy.ops.read_reg_page(hw, HV_LATECOL_UPPER, &phy_data);
4537         ret_val = hw->phy.ops.read_reg_page(hw, HV_LATECOL_LOWER, &phy_data);
4538         if (!ret_val)
4539                 adapter->stats.latecol += phy_data;
4540
4541         /* Collision Count - also used for adaptive IFS */
4542         hw->phy.ops.read_reg_page(hw, HV_COLC_UPPER, &phy_data);
4543         ret_val = hw->phy.ops.read_reg_page(hw, HV_COLC_LOWER, &phy_data);
4544         if (!ret_val)
4545                 hw->mac.collision_delta = phy_data;
4546
4547         /* Defer Count */
4548         hw->phy.ops.read_reg_page(hw, HV_DC_UPPER, &phy_data);
4549         ret_val = hw->phy.ops.read_reg_page(hw, HV_DC_LOWER, &phy_data);
4550         if (!ret_val)
4551                 adapter->stats.dc += phy_data;
4552
4553         /* Transmit with no CRS */
4554         hw->phy.ops.read_reg_page(hw, HV_TNCRS_UPPER, &phy_data);
4555         ret_val = hw->phy.ops.read_reg_page(hw, HV_TNCRS_LOWER, &phy_data);
4556         if (!ret_val)
4557                 adapter->stats.tncrs += phy_data;
4558
4559 release:
4560         hw->phy.ops.release(hw);
4561 }
4562
4563 /**
4564  * e1000e_update_stats - Update the board statistics counters
4565  * @adapter: board private structure
4566  **/
4567 static void e1000e_update_stats(struct e1000_adapter *adapter)
4568 {
4569         struct net_device *netdev = adapter->netdev;
4570         struct e1000_hw *hw = &adapter->hw;
4571         struct pci_dev *pdev = adapter->pdev;
4572
4573         /* Prevent stats update while adapter is being reset, or if the pci
4574          * connection is down.
4575          */
4576         if (adapter->link_speed == 0)
4577                 return;
4578         if (pci_channel_offline(pdev))
4579                 return;
4580
4581         adapter->stats.crcerrs += er32(CRCERRS);
4582         adapter->stats.gprc += er32(GPRC);
4583         adapter->stats.gorc += er32(GORCL);
4584         er32(GORCH);            /* Clear gorc */
4585         adapter->stats.bprc += er32(BPRC);
4586         adapter->stats.mprc += er32(MPRC);
4587         adapter->stats.roc += er32(ROC);
4588
4589         adapter->stats.mpc += er32(MPC);
4590
4591         /* Half-duplex statistics */
4592         if (adapter->link_duplex == HALF_DUPLEX) {
4593                 if (adapter->flags2 & FLAG2_HAS_PHY_STATS) {
4594                         e1000e_update_phy_stats(adapter);
4595                 } else {
4596                         adapter->stats.scc += er32(SCC);
4597                         adapter->stats.ecol += er32(ECOL);
4598                         adapter->stats.mcc += er32(MCC);
4599                         adapter->stats.latecol += er32(LATECOL);
4600                         adapter->stats.dc += er32(DC);
4601
4602                         hw->mac.collision_delta = er32(COLC);
4603
4604                         if ((hw->mac.type != e1000_82574) &&
4605                             (hw->mac.type != e1000_82583))
4606                                 adapter->stats.tncrs += er32(TNCRS);
4607                 }
4608                 adapter->stats.colc += hw->mac.collision_delta;
4609         }
4610
4611         adapter->stats.xonrxc += er32(XONRXC);
4612         adapter->stats.xontxc += er32(XONTXC);
4613         adapter->stats.xoffrxc += er32(XOFFRXC);
4614         adapter->stats.xofftxc += er32(XOFFTXC);
4615         adapter->stats.gptc += er32(GPTC);
4616         adapter->stats.gotc += er32(GOTCL);
4617         er32(GOTCH);            /* Clear gotc */
4618         adapter->stats.rnbc += er32(RNBC);
4619         adapter->stats.ruc += er32(RUC);
4620
4621         adapter->stats.mptc += er32(MPTC);
4622         adapter->stats.bptc += er32(BPTC);
4623
4624         /* used for adaptive IFS */
4625
4626         hw->mac.tx_packet_delta = er32(TPT);
4627         adapter->stats.tpt += hw->mac.tx_packet_delta;
4628
4629         adapter->stats.algnerrc += er32(ALGNERRC);
4630         adapter->stats.rxerrc += er32(RXERRC);
4631         adapter->stats.cexterr += er32(CEXTERR);
4632         adapter->stats.tsctc += er32(TSCTC);
4633         adapter->stats.tsctfc += er32(TSCTFC);
4634
4635         /* Fill out the OS statistics structure */
4636         netdev->stats.multicast = adapter->stats.mprc;
4637         netdev->stats.collisions = adapter->stats.colc;
4638
4639         /* Rx Errors */
4640
4641         /* RLEC on some newer hardware can be incorrect so build
4642          * our own version based on RUC and ROC
4643          */
4644         netdev->stats.rx_errors = adapter->stats.rxerrc +
4645             adapter->stats.crcerrs + adapter->stats.algnerrc +
4646             adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
4647         netdev->stats.rx_length_errors = adapter->stats.ruc +
4648             adapter->stats.roc;
4649         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
4650         netdev->stats.rx_frame_errors = adapter->stats.algnerrc;
4651         netdev->stats.rx_missed_errors = adapter->stats.mpc;
4652
4653         /* Tx Errors */
4654         netdev->stats.tx_errors = adapter->stats.ecol + adapter->stats.latecol;
4655         netdev->stats.tx_aborted_errors = adapter->stats.ecol;
4656         netdev->stats.tx_window_errors = adapter->stats.latecol;
4657         netdev->stats.tx_carrier_errors = adapter->stats.tncrs;
4658
4659         /* Tx Dropped needs to be maintained elsewhere */
4660
4661         /* Management Stats */
4662         adapter->stats.mgptc += er32(MGTPTC);
4663         adapter->stats.mgprc += er32(MGTPRC);
4664         adapter->stats.mgpdc += er32(MGTPDC);
4665
4666         /* Correctable ECC Errors */
4667         if (hw->mac.type == e1000_pch_lpt) {
4668                 u32 pbeccsts = er32(PBECCSTS);
4669                 adapter->corr_errors +=
4670                     pbeccsts & E1000_PBECCSTS_CORR_ERR_CNT_MASK;
4671                 adapter->uncorr_errors +=
4672                     (pbeccsts & E1000_PBECCSTS_UNCORR_ERR_CNT_MASK) >>
4673                     E1000_PBECCSTS_UNCORR_ERR_CNT_SHIFT;
4674         }
4675 }
4676
4677 /**
4678  * e1000_phy_read_status - Update the PHY register status snapshot
4679  * @adapter: board private structure
4680  **/
4681 static void e1000_phy_read_status(struct e1000_adapter *adapter)
4682 {
4683         struct e1000_hw *hw = &adapter->hw;
4684         struct e1000_phy_regs *phy = &adapter->phy_regs;
4685
4686         if ((er32(STATUS) & E1000_STATUS_LU) &&
4687             (adapter->hw.phy.media_type == e1000_media_type_copper)) {
4688                 int ret_val;
4689
4690                 pm_runtime_get_sync(&adapter->pdev->dev);
4691                 ret_val = e1e_rphy(hw, MII_BMCR, &phy->bmcr);
4692                 ret_val |= e1e_rphy(hw, MII_BMSR, &phy->bmsr);
4693                 ret_val |= e1e_rphy(hw, MII_ADVERTISE, &phy->advertise);
4694                 ret_val |= e1e_rphy(hw, MII_LPA, &phy->lpa);
4695                 ret_val |= e1e_rphy(hw, MII_EXPANSION, &phy->expansion);
4696                 ret_val |= e1e_rphy(hw, MII_CTRL1000, &phy->ctrl1000);
4697                 ret_val |= e1e_rphy(hw, MII_STAT1000, &phy->stat1000);
4698                 ret_val |= e1e_rphy(hw, MII_ESTATUS, &phy->estatus);
4699                 if (ret_val)
4700                         e_warn("Error reading PHY register\n");
4701                 pm_runtime_put_sync(&adapter->pdev->dev);
4702         } else {
4703                 /* Do not read PHY registers if link is not up
4704                  * Set values to typical power-on defaults
4705                  */
4706                 phy->bmcr = (BMCR_SPEED1000 | BMCR_ANENABLE | BMCR_FULLDPLX);
4707                 phy->bmsr = (BMSR_100FULL | BMSR_100HALF | BMSR_10FULL |
4708                              BMSR_10HALF | BMSR_ESTATEN | BMSR_ANEGCAPABLE |
4709                              BMSR_ERCAP);
4710                 phy->advertise = (ADVERTISE_PAUSE_ASYM | ADVERTISE_PAUSE_CAP |
4711                                   ADVERTISE_ALL | ADVERTISE_CSMA);
4712                 phy->lpa = 0;
4713                 phy->expansion = EXPANSION_ENABLENPAGE;
4714                 phy->ctrl1000 = ADVERTISE_1000FULL;
4715                 phy->stat1000 = 0;
4716                 phy->estatus = (ESTATUS_1000_TFULL | ESTATUS_1000_THALF);
4717         }
4718 }
4719
4720 static void e1000_print_link_info(struct e1000_adapter *adapter)
4721 {
4722         struct e1000_hw *hw = &adapter->hw;
4723         u32 ctrl = er32(CTRL);
4724
4725         /* Link status message must follow this format for user tools */
4726         pr_info("%s NIC Link is Up %d Mbps %s Duplex, Flow Control: %s\n",
4727                 adapter->netdev->name, adapter->link_speed,
4728                 adapter->link_duplex == FULL_DUPLEX ? "Full" : "Half",
4729                 (ctrl & E1000_CTRL_TFCE) && (ctrl & E1000_CTRL_RFCE) ? "Rx/Tx" :
4730                 (ctrl & E1000_CTRL_RFCE) ? "Rx" :
4731                 (ctrl & E1000_CTRL_TFCE) ? "Tx" : "None");
4732 }
4733
4734 static bool e1000e_has_link(struct e1000_adapter *adapter)
4735 {
4736         struct e1000_hw *hw = &adapter->hw;
4737         bool link_active = false;
4738         s32 ret_val = 0;
4739
4740         /* get_link_status is set on LSC (link status) interrupt or
4741          * Rx sequence error interrupt.  get_link_status will stay
4742          * false until the check_for_link establishes link
4743          * for copper adapters ONLY
4744          */
4745         switch (hw->phy.media_type) {
4746         case e1000_media_type_copper:
4747                 if (hw->mac.get_link_status) {
4748                         ret_val = hw->mac.ops.check_for_link(hw);
4749                         link_active = !hw->mac.get_link_status;
4750                 } else {
4751                         link_active = true;
4752                 }
4753                 break;
4754         case e1000_media_type_fiber:
4755                 ret_val = hw->mac.ops.check_for_link(hw);
4756                 link_active = !!(er32(STATUS) & E1000_STATUS_LU);
4757                 break;
4758         case e1000_media_type_internal_serdes:
4759                 ret_val = hw->mac.ops.check_for_link(hw);
4760                 link_active = adapter->hw.mac.serdes_has_link;
4761                 break;
4762         default:
4763         case e1000_media_type_unknown:
4764                 break;
4765         }
4766
4767         if ((ret_val == E1000_ERR_PHY) && (hw->phy.type == e1000_phy_igp_3) &&
4768             (er32(CTRL) & E1000_PHY_CTRL_GBE_DISABLE)) {
4769                 /* See e1000_kmrn_lock_loss_workaround_ich8lan() */
4770                 e_info("Gigabit has been disabled, downgrading speed\n");
4771         }
4772
4773         return link_active;
4774 }
4775
4776 static void e1000e_enable_receives(struct e1000_adapter *adapter)
4777 {
4778         /* make sure the receive unit is started */
4779         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) &&
4780             (adapter->flags & FLAG_RESTART_NOW)) {
4781                 struct e1000_hw *hw = &adapter->hw;
4782                 u32 rctl = er32(RCTL);
4783                 ew32(RCTL, rctl | E1000_RCTL_EN);
4784                 adapter->flags &= ~FLAG_RESTART_NOW;
4785         }
4786 }
4787
4788 static void e1000e_check_82574_phy_workaround(struct e1000_adapter *adapter)
4789 {
4790         struct e1000_hw *hw = &adapter->hw;
4791
4792         /* With 82574 controllers, PHY needs to be checked periodically
4793          * for hung state and reset, if two calls return true
4794          */
4795         if (e1000_check_phy_82574(hw))
4796                 adapter->phy_hang_count++;
4797         else
4798                 adapter->phy_hang_count = 0;
4799
4800         if (adapter->phy_hang_count > 1) {
4801                 adapter->phy_hang_count = 0;
4802                 schedule_work(&adapter->reset_task);
4803         }
4804 }
4805
4806 /**
4807  * e1000_watchdog - Timer Call-back
4808  * @data: pointer to adapter cast into an unsigned long
4809  **/
4810 static void e1000_watchdog(unsigned long data)
4811 {
4812         struct e1000_adapter *adapter = (struct e1000_adapter *)data;
4813
4814         /* Do the rest outside of interrupt context */
4815         schedule_work(&adapter->watchdog_task);
4816
4817         /* TODO: make this use queue_delayed_work() */
4818 }
4819
4820 static void e1000_watchdog_task(struct work_struct *work)
4821 {
4822         struct e1000_adapter *adapter = container_of(work,
4823                                                      struct e1000_adapter,
4824                                                      watchdog_task);
4825         struct net_device *netdev = adapter->netdev;
4826         struct e1000_mac_info *mac = &adapter->hw.mac;
4827         struct e1000_phy_info *phy = &adapter->hw.phy;
4828         struct e1000_ring *tx_ring = adapter->tx_ring;
4829         struct e1000_hw *hw = &adapter->hw;
4830         u32 link, tctl;
4831
4832         if (test_bit(__E1000_DOWN, &adapter->state))
4833                 return;
4834
4835         link = e1000e_has_link(adapter);
4836         if ((netif_carrier_ok(netdev)) && link) {
4837                 /* Cancel scheduled suspend requests. */
4838                 pm_runtime_resume(netdev->dev.parent);
4839
4840                 e1000e_enable_receives(adapter);
4841                 goto link_up;
4842         }
4843
4844         if ((e1000e_enable_tx_pkt_filtering(hw)) &&
4845             (adapter->mng_vlan_id != adapter->hw.mng_cookie.vlan_id))
4846                 e1000_update_mng_vlan(adapter);
4847
4848         if (link) {
4849                 if (!netif_carrier_ok(netdev)) {
4850                         bool txb2b = true;
4851
4852                         /* Cancel scheduled suspend requests. */
4853                         pm_runtime_resume(netdev->dev.parent);
4854
4855                         /* update snapshot of PHY registers on LSC */
4856                         e1000_phy_read_status(adapter);
4857                         mac->ops.get_link_up_info(&adapter->hw,
4858                                                   &adapter->link_speed,
4859                                                   &adapter->link_duplex);
4860                         e1000_print_link_info(adapter);
4861
4862                         /* check if SmartSpeed worked */
4863                         e1000e_check_downshift(hw);
4864                         if (phy->speed_downgraded)
4865                                 netdev_warn(netdev,
4866                                             "Link Speed was downgraded by SmartSpeed\n");
4867
4868                         /* On supported PHYs, check for duplex mismatch only
4869                          * if link has autonegotiated at 10/100 half
4870                          */
4871                         if ((hw->phy.type == e1000_phy_igp_3 ||
4872                              hw->phy.type == e1000_phy_bm) &&
4873                             (hw->mac.autoneg == true) &&
4874                             (adapter->link_speed == SPEED_10 ||
4875                              adapter->link_speed == SPEED_100) &&
4876                             (adapter->link_duplex == HALF_DUPLEX)) {
4877                                 u16 autoneg_exp;
4878
4879                                 e1e_rphy(hw, MII_EXPANSION, &autoneg_exp);
4880
4881                                 if (!(autoneg_exp & EXPANSION_NWAY))
4882                                         e_info("Autonegotiated half duplex but link partner cannot autoneg.  Try forcing full duplex if link gets many collisions.\n");
4883                         }
4884
4885                         /* adjust timeout factor according to speed/duplex */
4886                         adapter->tx_timeout_factor = 1;
4887                         switch (adapter->link_speed) {
4888                         case SPEED_10:
4889                                 txb2b = false;
4890                                 adapter->tx_timeout_factor = 16;
4891                                 break;
4892                         case SPEED_100:
4893                                 txb2b = false;
4894                                 adapter->tx_timeout_factor = 10;
4895                                 break;
4896                         }
4897
4898                         /* workaround: re-program speed mode bit after
4899                          * link-up event
4900                          */
4901                         if ((adapter->flags & FLAG_TARC_SPEED_MODE_BIT) &&
4902                             !txb2b) {
4903                                 u32 tarc0;
4904                                 tarc0 = er32(TARC(0));
4905                                 tarc0 &= ~SPEED_MODE_BIT;
4906                                 ew32(TARC(0), tarc0);
4907                         }
4908
4909                         /* disable TSO for pcie and 10/100 speeds, to avoid
4910                          * some hardware issues
4911                          */
4912                         if (!(adapter->flags & FLAG_TSO_FORCE)) {
4913                                 switch (adapter->link_speed) {
4914                                 case SPEED_10:
4915                                 case SPEED_100:
4916                                         e_info("10/100 speed: disabling TSO\n");
4917                                         netdev->features &= ~NETIF_F_TSO;
4918                                         netdev->features &= ~NETIF_F_TSO6;
4919                                         break;
4920                                 case SPEED_1000:
4921                                         netdev->features |= NETIF_F_TSO;
4922                                         netdev->features |= NETIF_F_TSO6;
4923                                         break;
4924                                 default:
4925                                         /* oops */
4926                                         break;
4927                                 }
4928                         }
4929
4930                         /* enable transmits in the hardware, need to do this
4931                          * after setting TARC(0)
4932                          */
4933                         tctl = er32(TCTL);
4934                         tctl |= E1000_TCTL_EN;
4935                         ew32(TCTL, tctl);
4936
4937                         /* Perform any post-link-up configuration before
4938                          * reporting link up.
4939                          */
4940                         if (phy->ops.cfg_on_link_up)
4941                                 phy->ops.cfg_on_link_up(hw);
4942
4943                         netif_carrier_on(netdev);
4944
4945                         if (!test_bit(__E1000_DOWN, &adapter->state))
4946                                 mod_timer(&adapter->phy_info_timer,
4947                                           round_jiffies(jiffies + 2 * HZ));
4948                 }
4949         } else {
4950                 if (netif_carrier_ok(netdev)) {
4951                         adapter->link_speed = 0;
4952                         adapter->link_duplex = 0;
4953                         /* Link status message must follow this format */
4954                         pr_info("%s NIC Link is Down\n", adapter->netdev->name);
4955                         netif_carrier_off(netdev);
4956                         if (!test_bit(__E1000_DOWN, &adapter->state))
4957                                 mod_timer(&adapter->phy_info_timer,
4958                                           round_jiffies(jiffies + 2 * HZ));
4959
4960                         /* The link is lost so the controller stops DMA.
4961                          * If there is queued Tx work that cannot be done
4962                          * or if on an 8000ES2LAN which requires a Rx packet
4963                          * buffer work-around on link down event, reset the
4964                          * controller to flush the Tx/Rx packet buffers.
4965                          * (Do the reset outside of interrupt context).
4966                          */
4967                         if ((adapter->flags & FLAG_RX_NEEDS_RESTART) ||
4968                             (e1000_desc_unused(tx_ring) + 1 < tx_ring->count))
4969                                 adapter->flags |= FLAG_RESTART_NOW;
4970                         else
4971                                 pm_schedule_suspend(netdev->dev.parent,
4972                                                     LINK_TIMEOUT);
4973                 }
4974         }
4975
4976 link_up:
4977         spin_lock(&adapter->stats64_lock);
4978         e1000e_update_stats(adapter);
4979
4980         mac->tx_packet_delta = adapter->stats.tpt - adapter->tpt_old;
4981         adapter->tpt_old = adapter->stats.tpt;
4982         mac->collision_delta = adapter->stats.colc - adapter->colc_old;
4983         adapter->colc_old = adapter->stats.colc;
4984
4985         adapter->gorc = adapter->stats.gorc - adapter->gorc_old;
4986         adapter->gorc_old = adapter->stats.gorc;
4987         adapter->gotc = adapter->stats.gotc - adapter->gotc_old;
4988         adapter->gotc_old = adapter->stats.gotc;
4989         spin_unlock(&adapter->stats64_lock);
4990
4991         if (adapter->flags & FLAG_RESTART_NOW) {
4992                 schedule_work(&adapter->reset_task);
4993                 /* return immediately since reset is imminent */
4994                 return;
4995         }
4996
4997         e1000e_update_adaptive(&adapter->hw);
4998
4999         /* Simple mode for Interrupt Throttle Rate (ITR) */
5000         if (adapter->itr_setting == 4) {
5001                 /* Symmetric Tx/Rx gets a reduced ITR=2000;
5002                  * Total asymmetrical Tx or Rx gets ITR=8000;
5003                  * everyone else is between 2000-8000.
5004                  */
5005                 u32 goc = (adapter->gotc + adapter->gorc) / 10000;
5006                 u32 dif = (adapter->gotc > adapter->gorc ?
5007                            adapter->gotc - adapter->gorc :
5008                            adapter->gorc - adapter->gotc) / 10000;
5009                 u32 itr = goc > 0 ? (dif * 6000 / goc + 2000) : 8000;
5010
5011                 e1000e_write_itr(adapter, itr);
5012         }
5013
5014         /* Cause software interrupt to ensure Rx ring is cleaned */
5015         if (adapter->msix_entries)
5016                 ew32(ICS, adapter->rx_ring->ims_val);
5017         else
5018                 ew32(ICS, E1000_ICS_RXDMT0);
5019
5020         /* flush pending descriptors to memory before detecting Tx hang */
5021         e1000e_flush_descriptors(adapter);
5022
5023         /* Force detection of hung controller every watchdog period */
5024         adapter->detect_tx_hung = true;
5025
5026         /* With 82571 controllers, LAA may be overwritten due to controller
5027          * reset from the other port. Set the appropriate LAA in RAR[0]
5028          */
5029         if (e1000e_get_laa_state_82571(hw))
5030                 hw->mac.ops.rar_set(hw, adapter->hw.mac.addr, 0);
5031
5032         if (adapter->flags2 & FLAG2_CHECK_PHY_HANG)
5033                 e1000e_check_82574_phy_workaround(adapter);
5034
5035         /* Clear valid timestamp stuck in RXSTMPL/H due to a Rx error */
5036         if (adapter->hwtstamp_config.rx_filter != HWTSTAMP_FILTER_NONE) {
5037                 if ((adapter->flags2 & FLAG2_CHECK_RX_HWTSTAMP) &&
5038                     (er32(TSYNCRXCTL) & E1000_TSYNCRXCTL_VALID)) {
5039                         er32(RXSTMPH);
5040                         adapter->rx_hwtstamp_cleared++;
5041                 } else {
5042                         adapter->flags2 |= FLAG2_CHECK_RX_HWTSTAMP;
5043                 }
5044         }
5045
5046         /* Reset the timer */
5047         if (!test_bit(__E1000_DOWN, &adapter->state))
5048                 mod_timer(&adapter->watchdog_timer,
5049                           round_jiffies(jiffies + 2 * HZ));
5050 }
5051
5052 #define E1000_TX_FLAGS_CSUM             0x00000001
5053 #define E1000_TX_FLAGS_VLAN             0x00000002
5054 #define E1000_TX_FLAGS_TSO              0x00000004
5055 #define E1000_TX_FLAGS_IPV4             0x00000008
5056 #define E1000_TX_FLAGS_NO_FCS           0x00000010
5057 #define E1000_TX_FLAGS_HWTSTAMP         0x00000020
5058 #define E1000_TX_FLAGS_VLAN_MASK        0xffff0000
5059 #define E1000_TX_FLAGS_VLAN_SHIFT       16
5060
5061 static int e1000_tso(struct e1000_ring *tx_ring, struct sk_buff *skb)
5062 {
5063         struct e1000_context_desc *context_desc;
5064         struct e1000_buffer *buffer_info;
5065         unsigned int i;
5066         u32 cmd_length = 0;
5067         u16 ipcse = 0, mss;
5068         u8 ipcss, ipcso, tucss, tucso, hdr_len;
5069
5070         if (!skb_is_gso(skb))
5071                 return 0;
5072
5073         if (skb_header_cloned(skb)) {
5074                 int err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5075
5076                 if (err)
5077                         return err;
5078         }
5079
5080         hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5081         mss = skb_shinfo(skb)->gso_size;
5082         if (skb->protocol == htons(ETH_P_IP)) {
5083                 struct iphdr *iph = ip_hdr(skb);
5084                 iph->tot_len = 0;
5085                 iph->check = 0;
5086                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr, iph->daddr,
5087                                                          0, IPPROTO_TCP, 0);
5088                 cmd_length = E1000_TXD_CMD_IP;
5089                 ipcse = skb_transport_offset(skb) - 1;
5090         } else if (skb_is_gso_v6(skb)) {
5091                 ipv6_hdr(skb)->payload_len = 0;
5092                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5093                                                        &ipv6_hdr(skb)->daddr,
5094                                                        0, IPPROTO_TCP, 0);
5095                 ipcse = 0;
5096         }
5097         ipcss = skb_network_offset(skb);
5098         ipcso = (void *)&(ip_hdr(skb)->check) - (void *)skb->data;
5099         tucss = skb_transport_offset(skb);
5100         tucso = (void *)&(tcp_hdr(skb)->check) - (void *)skb->data;
5101
5102         cmd_length |= (E1000_TXD_CMD_DEXT | E1000_TXD_CMD_TSE |
5103                        E1000_TXD_CMD_TCP | (skb->len - (hdr_len)));
5104
5105         i = tx_ring->next_to_use;
5106         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5107         buffer_info = &tx_ring->buffer_info[i];
5108
5109         context_desc->lower_setup.ip_fields.ipcss = ipcss;
5110         context_desc->lower_setup.ip_fields.ipcso = ipcso;
5111         context_desc->lower_setup.ip_fields.ipcse = cpu_to_le16(ipcse);
5112         context_desc->upper_setup.tcp_fields.tucss = tucss;
5113         context_desc->upper_setup.tcp_fields.tucso = tucso;
5114         context_desc->upper_setup.tcp_fields.tucse = 0;
5115         context_desc->tcp_seg_setup.fields.mss = cpu_to_le16(mss);
5116         context_desc->tcp_seg_setup.fields.hdr_len = hdr_len;
5117         context_desc->cmd_and_length = cpu_to_le32(cmd_length);
5118
5119         buffer_info->time_stamp = jiffies;
5120         buffer_info->next_to_watch = i;
5121
5122         i++;
5123         if (i == tx_ring->count)
5124                 i = 0;
5125         tx_ring->next_to_use = i;
5126
5127         return 1;
5128 }
5129
5130 static bool e1000_tx_csum(struct e1000_ring *tx_ring, struct sk_buff *skb)
5131 {
5132         struct e1000_adapter *adapter = tx_ring->adapter;
5133         struct e1000_context_desc *context_desc;
5134         struct e1000_buffer *buffer_info;
5135         unsigned int i;
5136         u8 css;
5137         u32 cmd_len = E1000_TXD_CMD_DEXT;
5138         __be16 protocol;
5139
5140         if (skb->ip_summed != CHECKSUM_PARTIAL)
5141                 return 0;
5142
5143         if (skb->protocol == cpu_to_be16(ETH_P_8021Q))
5144                 protocol = vlan_eth_hdr(skb)->h_vlan_encapsulated_proto;
5145         else
5146                 protocol = skb->protocol;
5147
5148         switch (protocol) {
5149         case cpu_to_be16(ETH_P_IP):
5150                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5151                         cmd_len |= E1000_TXD_CMD_TCP;
5152                 break;
5153         case cpu_to_be16(ETH_P_IPV6):
5154                 /* XXX not handling all IPV6 headers */
5155                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5156                         cmd_len |= E1000_TXD_CMD_TCP;
5157                 break;
5158         default:
5159                 if (unlikely(net_ratelimit()))
5160                         e_warn("checksum_partial proto=%x!\n",
5161                                be16_to_cpu(protocol));
5162                 break;
5163         }
5164
5165         css = skb_checksum_start_offset(skb);
5166
5167         i = tx_ring->next_to_use;
5168         buffer_info = &tx_ring->buffer_info[i];
5169         context_desc = E1000_CONTEXT_DESC(*tx_ring, i);
5170
5171         context_desc->lower_setup.ip_config = 0;
5172         context_desc->upper_setup.tcp_fields.tucss = css;
5173         context_desc->upper_setup.tcp_fields.tucso = css + skb->csum_offset;
5174         context_desc->upper_setup.tcp_fields.tucse = 0;
5175         context_desc->tcp_seg_setup.data = 0;
5176         context_desc->cmd_and_length = cpu_to_le32(cmd_len);
5177
5178         buffer_info->time_stamp = jiffies;
5179         buffer_info->next_to_watch = i;
5180
5181         i++;
5182         if (i == tx_ring->count)
5183                 i = 0;
5184         tx_ring->next_to_use = i;
5185
5186         return 1;
5187 }
5188
5189 static int e1000_tx_map(struct e1000_ring *tx_ring, struct sk_buff *skb,
5190                         unsigned int first, unsigned int max_per_txd,
5191                         unsigned int nr_frags)
5192 {
5193         struct e1000_adapter *adapter = tx_ring->adapter;
5194         struct pci_dev *pdev = adapter->pdev;
5195         struct e1000_buffer *buffer_info;
5196         unsigned int len = skb_headlen(skb);
5197         unsigned int offset = 0, size, count = 0, i;
5198         unsigned int f, bytecount, segs;
5199
5200         i = tx_ring->next_to_use;
5201
5202         while (len) {
5203                 buffer_info = &tx_ring->buffer_info[i];
5204                 size = min(len, max_per_txd);
5205
5206                 buffer_info->length = size;
5207                 buffer_info->time_stamp = jiffies;
5208                 buffer_info->next_to_watch = i;
5209                 buffer_info->dma = dma_map_single(&pdev->dev,
5210                                                   skb->data + offset,
5211                                                   size, DMA_TO_DEVICE);
5212                 buffer_info->mapped_as_page = false;
5213                 if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5214                         goto dma_error;
5215
5216                 len -= size;
5217                 offset += size;
5218                 count++;
5219
5220                 if (len) {
5221                         i++;
5222                         if (i == tx_ring->count)
5223                                 i = 0;
5224                 }
5225         }
5226
5227         for (f = 0; f < nr_frags; f++) {
5228                 const struct skb_frag_struct *frag;
5229
5230                 frag = &skb_shinfo(skb)->frags[f];
5231                 len = skb_frag_size(frag);
5232                 offset = 0;
5233
5234                 while (len) {
5235                         i++;
5236                         if (i == tx_ring->count)
5237                                 i = 0;
5238
5239                         buffer_info = &tx_ring->buffer_info[i];
5240                         size = min(len, max_per_txd);
5241
5242                         buffer_info->length = size;
5243                         buffer_info->time_stamp = jiffies;
5244                         buffer_info->next_to_watch = i;
5245                         buffer_info->dma = skb_frag_dma_map(&pdev->dev, frag,
5246                                                             offset, size,
5247                                                             DMA_TO_DEVICE);
5248                         buffer_info->mapped_as_page = true;
5249                         if (dma_mapping_error(&pdev->dev, buffer_info->dma))
5250                                 goto dma_error;
5251
5252                         len -= size;
5253                         offset += size;
5254                         count++;
5255                 }
5256         }
5257
5258         segs = skb_shinfo(skb)->gso_segs ? : 1;
5259         /* multiply data chunks by size of headers */
5260         bytecount = ((segs - 1) * skb_headlen(skb)) + skb->len;
5261
5262         tx_ring->buffer_info[i].skb = skb;
5263         tx_ring->buffer_info[i].segs = segs;
5264         tx_ring->buffer_info[i].bytecount = bytecount;
5265         tx_ring->buffer_info[first].next_to_watch = i;
5266
5267         return count;
5268
5269 dma_error:
5270         dev_err(&pdev->dev, "Tx DMA map failed\n");
5271         buffer_info->dma = 0;
5272         if (count)
5273                 count--;
5274
5275         while (count--) {
5276                 if (i == 0)
5277                         i += tx_ring->count;
5278                 i--;
5279                 buffer_info = &tx_ring->buffer_info[i];
5280                 e1000_put_txbuf(tx_ring, buffer_info);
5281         }
5282
5283         return 0;
5284 }
5285
5286 static void e1000_tx_queue(struct e1000_ring *tx_ring, int tx_flags, int count)
5287 {
5288         struct e1000_adapter *adapter = tx_ring->adapter;
5289         struct e1000_tx_desc *tx_desc = NULL;
5290         struct e1000_buffer *buffer_info;
5291         u32 txd_upper = 0, txd_lower = E1000_TXD_CMD_IFCS;
5292         unsigned int i;
5293
5294         if (tx_flags & E1000_TX_FLAGS_TSO) {
5295                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D |
5296                     E1000_TXD_CMD_TSE;
5297                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5298
5299                 if (tx_flags & E1000_TX_FLAGS_IPV4)
5300                         txd_upper |= E1000_TXD_POPTS_IXSM << 8;
5301         }
5302
5303         if (tx_flags & E1000_TX_FLAGS_CSUM) {
5304                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5305                 txd_upper |= E1000_TXD_POPTS_TXSM << 8;
5306         }
5307
5308         if (tx_flags & E1000_TX_FLAGS_VLAN) {
5309                 txd_lower |= E1000_TXD_CMD_VLE;
5310                 txd_upper |= (tx_flags & E1000_TX_FLAGS_VLAN_MASK);
5311         }
5312
5313         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5314                 txd_lower &= ~(E1000_TXD_CMD_IFCS);
5315
5316         if (unlikely(tx_flags & E1000_TX_FLAGS_HWTSTAMP)) {
5317                 txd_lower |= E1000_TXD_CMD_DEXT | E1000_TXD_DTYP_D;
5318                 txd_upper |= E1000_TXD_EXTCMD_TSTAMP;
5319         }
5320
5321         i = tx_ring->next_to_use;
5322
5323         do {
5324                 buffer_info = &tx_ring->buffer_info[i];
5325                 tx_desc = E1000_TX_DESC(*tx_ring, i);
5326                 tx_desc->buffer_addr = cpu_to_le64(buffer_info->dma);
5327                 tx_desc->lower.data = cpu_to_le32(txd_lower |
5328                                                   buffer_info->length);
5329                 tx_desc->upper.data = cpu_to_le32(txd_upper);
5330
5331                 i++;
5332                 if (i == tx_ring->count)
5333                         i = 0;
5334         } while (--count > 0);
5335
5336         tx_desc->lower.data |= cpu_to_le32(adapter->txd_cmd);
5337
5338         /* txd_cmd re-enables FCS, so we'll re-disable it here as desired. */
5339         if (unlikely(tx_flags & E1000_TX_FLAGS_NO_FCS))
5340                 tx_desc->lower.data &= ~(cpu_to_le32(E1000_TXD_CMD_IFCS));
5341
5342         /* Force memory writes to complete before letting h/w
5343          * know there are new descriptors to fetch.  (Only
5344          * applicable for weak-ordered memory model archs,
5345          * such as IA-64).
5346          */
5347         wmb();
5348
5349         tx_ring->next_to_use = i;
5350
5351         if (adapter->flags2 & FLAG2_PCIM2PCI_ARBITER_WA)
5352                 e1000e_update_tdt_wa(tx_ring, i);
5353         else
5354                 writel(i, tx_ring->tail);
5355
5356         /* we need this if more than one processor can write to our tail
5357          * at a time, it synchronizes IO on IA64/Altix systems
5358          */
5359         mmiowb();
5360 }
5361
5362 #define MINIMUM_DHCP_PACKET_SIZE 282
5363 static int e1000_transfer_dhcp_info(struct e1000_adapter *adapter,
5364                                     struct sk_buff *skb)
5365 {
5366         struct e1000_hw *hw = &adapter->hw;
5367         u16 length, offset;
5368
5369         if (vlan_tx_tag_present(skb) &&
5370             !((vlan_tx_tag_get(skb) == adapter->hw.mng_cookie.vlan_id) &&
5371               (adapter->hw.mng_cookie.status &
5372                E1000_MNG_DHCP_COOKIE_STATUS_VLAN)))
5373                 return 0;
5374
5375         if (skb->len <= MINIMUM_DHCP_PACKET_SIZE)
5376                 return 0;
5377
5378         if (((struct ethhdr *)skb->data)->h_proto != htons(ETH_P_IP))
5379                 return 0;
5380
5381         {
5382                 const struct iphdr *ip = (struct iphdr *)((u8 *)skb->data + 14);
5383                 struct udphdr *udp;
5384
5385                 if (ip->protocol != IPPROTO_UDP)
5386                         return 0;
5387
5388                 udp = (struct udphdr *)((u8 *)ip + (ip->ihl << 2));
5389                 if (ntohs(udp->dest) != 67)
5390                         return 0;
5391
5392                 offset = (u8 *)udp + 8 - skb->data;
5393                 length = skb->len - offset;
5394                 return e1000e_mng_write_dhcp_info(hw, (u8 *)udp + 8, length);
5395         }
5396
5397         return 0;
5398 }
5399
5400 static int __e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5401 {
5402         struct e1000_adapter *adapter = tx_ring->adapter;
5403
5404         netif_stop_queue(adapter->netdev);
5405         /* Herbert's original patch had:
5406          *  smp_mb__after_netif_stop_queue();
5407          * but since that doesn't exist yet, just open code it.
5408          */
5409         smp_mb();
5410
5411         /* We need to check again in a case another CPU has just
5412          * made room available.
5413          */
5414         if (e1000_desc_unused(tx_ring) < size)
5415                 return -EBUSY;
5416
5417         /* A reprieve! */
5418         netif_start_queue(adapter->netdev);
5419         ++adapter->restart_queue;
5420         return 0;
5421 }
5422
5423 static int e1000_maybe_stop_tx(struct e1000_ring *tx_ring, int size)
5424 {
5425         BUG_ON(size > tx_ring->count);
5426
5427         if (e1000_desc_unused(tx_ring) >= size)
5428                 return 0;
5429         return __e1000_maybe_stop_tx(tx_ring, size);
5430 }
5431
5432 static netdev_tx_t e1000_xmit_frame(struct sk_buff *skb,
5433                                     struct net_device *netdev)
5434 {
5435         struct e1000_adapter *adapter = netdev_priv(netdev);
5436         struct e1000_ring *tx_ring = adapter->tx_ring;
5437         unsigned int first;
5438         unsigned int tx_flags = 0;
5439         unsigned int len = skb_headlen(skb);
5440         unsigned int nr_frags;
5441         unsigned int mss;
5442         int count = 0;
5443         int tso;
5444         unsigned int f;
5445
5446         if (test_bit(__E1000_DOWN, &adapter->state)) {
5447                 dev_kfree_skb_any(skb);
5448                 return NETDEV_TX_OK;
5449         }
5450
5451         if (skb->len <= 0) {
5452                 dev_kfree_skb_any(skb);
5453                 return NETDEV_TX_OK;
5454         }
5455
5456         /* The minimum packet size with TCTL.PSP set is 17 bytes so
5457          * pad skb in order to meet this minimum size requirement
5458          */
5459         if (unlikely(skb->len < 17)) {
5460                 if (skb_pad(skb, 17 - skb->len))
5461                         return NETDEV_TX_OK;
5462                 skb->len = 17;
5463                 skb_set_tail_pointer(skb, 17);
5464         }
5465
5466         mss = skb_shinfo(skb)->gso_size;
5467         if (mss) {
5468                 u8 hdr_len;
5469
5470                 /* TSO Workaround for 82571/2/3 Controllers -- if skb->data
5471                  * points to just header, pull a few bytes of payload from
5472                  * frags into skb->data
5473                  */
5474                 hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
5475                 /* we do this workaround for ES2LAN, but it is un-necessary,
5476                  * avoiding it could save a lot of cycles
5477                  */
5478                 if (skb->data_len && (hdr_len == len)) {
5479                         unsigned int pull_size;
5480
5481                         pull_size = min_t(unsigned int, 4, skb->data_len);
5482                         if (!__pskb_pull_tail(skb, pull_size)) {
5483                                 e_err("__pskb_pull_tail failed.\n");
5484                                 dev_kfree_skb_any(skb);
5485                                 return NETDEV_TX_OK;
5486                         }
5487                         len = skb_headlen(skb);
5488                 }
5489         }
5490
5491         /* reserve a descriptor for the offload context */
5492         if ((mss) || (skb->ip_summed == CHECKSUM_PARTIAL))
5493                 count++;
5494         count++;
5495
5496         count += DIV_ROUND_UP(len, adapter->tx_fifo_limit);
5497
5498         nr_frags = skb_shinfo(skb)->nr_frags;
5499         for (f = 0; f < nr_frags; f++)
5500                 count += DIV_ROUND_UP(skb_frag_size(&skb_shinfo(skb)->frags[f]),
5501                                       adapter->tx_fifo_limit);
5502
5503         if (adapter->hw.mac.tx_pkt_filtering)
5504                 e1000_transfer_dhcp_info(adapter, skb);
5505
5506         /* need: count + 2 desc gap to keep tail from touching
5507          * head, otherwise try next time
5508          */
5509         if (e1000_maybe_stop_tx(tx_ring, count + 2))
5510                 return NETDEV_TX_BUSY;
5511
5512         if (vlan_tx_tag_present(skb)) {
5513                 tx_flags |= E1000_TX_FLAGS_VLAN;
5514                 tx_flags |= (vlan_tx_tag_get(skb) << E1000_TX_FLAGS_VLAN_SHIFT);
5515         }
5516
5517         first = tx_ring->next_to_use;
5518
5519         tso = e1000_tso(tx_ring, skb);
5520         if (tso < 0) {
5521                 dev_kfree_skb_any(skb);
5522                 return NETDEV_TX_OK;
5523         }
5524
5525         if (tso)
5526                 tx_flags |= E1000_TX_FLAGS_TSO;
5527         else if (e1000_tx_csum(tx_ring, skb))
5528                 tx_flags |= E1000_TX_FLAGS_CSUM;
5529
5530         /* Old method was to assume IPv4 packet by default if TSO was enabled.
5531          * 82571 hardware supports TSO capabilities for IPv6 as well...
5532          * no longer assume, we must.
5533          */
5534         if (skb->protocol == htons(ETH_P_IP))
5535                 tx_flags |= E1000_TX_FLAGS_IPV4;
5536
5537         if (unlikely(skb->no_fcs))
5538                 tx_flags |= E1000_TX_FLAGS_NO_FCS;
5539
5540         /* if count is 0 then mapping error has occurred */
5541         count = e1000_tx_map(tx_ring, skb, first, adapter->tx_fifo_limit,
5542                              nr_frags);
5543         if (count) {
5544                 if (unlikely((skb_shinfo(skb)->tx_flags & SKBTX_HW_TSTAMP) &&
5545                              !adapter->tx_hwtstamp_skb)) {
5546                         skb_shinfo(skb)->tx_flags |= SKBTX_IN_PROGRESS;
5547                         tx_flags |= E1000_TX_FLAGS_HWTSTAMP;
5548                         adapter->tx_hwtstamp_skb = skb_get(skb);
5549                         schedule_work(&adapter->tx_hwtstamp_work);
5550                 } else {
5551                         skb_tx_timestamp(skb);
5552                 }
5553
5554                 netdev_sent_queue(netdev, skb->len);
5555                 e1000_tx_queue(tx_ring, tx_flags, count);
5556                 /* Make sure there is space in the ring for the next send. */
5557                 e1000_maybe_stop_tx(tx_ring,
5558                                     (MAX_SKB_FRAGS *
5559                                      DIV_ROUND_UP(PAGE_SIZE,
5560                                                   adapter->tx_fifo_limit) + 2));
5561         } else {
5562                 dev_kfree_skb_any(skb);
5563                 tx_ring->buffer_info[first].time_stamp = 0;
5564                 tx_ring->next_to_use = first;
5565         }
5566
5567         return NETDEV_TX_OK;
5568 }
5569
5570 /**
5571  * e1000_tx_timeout - Respond to a Tx Hang
5572  * @netdev: network interface device structure
5573  **/
5574 static void e1000_tx_timeout(struct net_device *netdev)
5575 {
5576         struct e1000_adapter *adapter = netdev_priv(netdev);
5577
5578         /* Do the reset outside of interrupt context */
5579         adapter->tx_timeout_count++;
5580         schedule_work(&adapter->reset_task);
5581 }
5582
5583 static void e1000_reset_task(struct work_struct *work)
5584 {
5585         struct e1000_adapter *adapter;
5586         adapter = container_of(work, struct e1000_adapter, reset_task);
5587
5588         /* don't run the task if already down */
5589         if (test_bit(__E1000_DOWN, &adapter->state))
5590                 return;
5591
5592         if (!(adapter->flags & FLAG_RESTART_NOW)) {
5593                 e1000e_dump(adapter);
5594                 e_err("Reset adapter unexpectedly\n");
5595         }
5596         e1000e_reinit_locked(adapter);
5597 }
5598
5599 /**
5600  * e1000_get_stats64 - Get System Network Statistics
5601  * @netdev: network interface device structure
5602  * @stats: rtnl_link_stats64 pointer
5603  *
5604  * Returns the address of the device statistics structure.
5605  **/
5606 struct rtnl_link_stats64 *e1000e_get_stats64(struct net_device *netdev,
5607                                              struct rtnl_link_stats64 *stats)
5608 {
5609         struct e1000_adapter *adapter = netdev_priv(netdev);
5610
5611         memset(stats, 0, sizeof(struct rtnl_link_stats64));
5612         spin_lock(&adapter->stats64_lock);
5613         e1000e_update_stats(adapter);
5614         /* Fill out the OS statistics structure */
5615         stats->rx_bytes = adapter->stats.gorc;
5616         stats->rx_packets = adapter->stats.gprc;
5617         stats->tx_bytes = adapter->stats.gotc;
5618         stats->tx_packets = adapter->stats.gptc;
5619         stats->multicast = adapter->stats.mprc;
5620         stats->collisions = adapter->stats.colc;
5621
5622         /* Rx Errors */
5623
5624         /* RLEC on some newer hardware can be incorrect so build
5625          * our own version based on RUC and ROC
5626          */
5627         stats->rx_errors = adapter->stats.rxerrc +
5628             adapter->stats.crcerrs + adapter->stats.algnerrc +
5629             adapter->stats.ruc + adapter->stats.roc + adapter->stats.cexterr;
5630         stats->rx_length_errors = adapter->stats.ruc + adapter->stats.roc;
5631         stats->rx_crc_errors = adapter->stats.crcerrs;
5632         stats->rx_frame_errors = adapter->stats.algnerrc;
5633         stats->rx_missed_errors = adapter->stats.mpc;
5634
5635         /* Tx Errors */
5636         stats->tx_errors = adapter->stats.ecol + adapter->stats.latecol;
5637         stats->tx_aborted_errors = adapter->stats.ecol;
5638         stats->tx_window_errors = adapter->stats.latecol;
5639         stats->tx_carrier_errors = adapter->stats.tncrs;
5640
5641         /* Tx Dropped needs to be maintained elsewhere */
5642
5643         spin_unlock(&adapter->stats64_lock);
5644         return stats;
5645 }
5646
5647 /**
5648  * e1000_change_mtu - Change the Maximum Transfer Unit
5649  * @netdev: network interface device structure
5650  * @new_mtu: new value for maximum frame size
5651  *
5652  * Returns 0 on success, negative on failure
5653  **/
5654 static int e1000_change_mtu(struct net_device *netdev, int new_mtu)
5655 {
5656         struct e1000_adapter *adapter = netdev_priv(netdev);
5657         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5658
5659         /* Jumbo frame support */
5660         if ((max_frame > ETH_FRAME_LEN + ETH_FCS_LEN) &&
5661             !(adapter->flags & FLAG_HAS_JUMBO_FRAMES)) {
5662                 e_err("Jumbo Frames not supported.\n");
5663                 return -EINVAL;
5664         }
5665
5666         /* Supported frame sizes */
5667         if ((new_mtu < ETH_ZLEN + ETH_FCS_LEN + VLAN_HLEN) ||
5668             (max_frame > adapter->max_hw_frame_size)) {
5669                 e_err("Unsupported MTU setting\n");
5670                 return -EINVAL;
5671         }
5672
5673         /* Jumbo frame workaround on 82579 and newer requires CRC be stripped */
5674         if ((adapter->hw.mac.type >= e1000_pch2lan) &&
5675             !(adapter->flags2 & FLAG2_CRC_STRIPPING) &&
5676             (new_mtu > ETH_DATA_LEN)) {
5677                 e_err("Jumbo Frames not supported on this device when CRC stripping is disabled.\n");
5678                 return -EINVAL;
5679         }
5680
5681         while (test_and_set_bit(__E1000_RESETTING, &adapter->state))
5682                 usleep_range(1000, 2000);
5683         /* e1000e_down -> e1000e_reset dependent on max_frame_size & mtu */
5684         adapter->max_frame_size = max_frame;
5685         e_info("changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5686         netdev->mtu = new_mtu;
5687         if (netif_running(netdev))
5688                 e1000e_down(adapter);
5689
5690         /* NOTE: netdev_alloc_skb reserves 16 bytes, and typically NET_IP_ALIGN
5691          * means we reserve 2 more, this pushes us to allocate from the next
5692          * larger slab size.
5693          * i.e. RXBUFFER_2048 --> size-4096 slab
5694          * However with the new *_jumbo_rx* routines, jumbo receives will use
5695          * fragmented skbs
5696          */
5697
5698         if (max_frame <= 2048)
5699                 adapter->rx_buffer_len = 2048;
5700         else
5701                 adapter->rx_buffer_len = 4096;
5702
5703         /* adjust allocation if LPE protects us, and we aren't using SBP */
5704         if ((max_frame == ETH_FRAME_LEN + ETH_FCS_LEN) ||
5705             (max_frame == ETH_FRAME_LEN + VLAN_HLEN + ETH_FCS_LEN))
5706                 adapter->rx_buffer_len = ETH_FRAME_LEN + VLAN_HLEN
5707                     + ETH_FCS_LEN;
5708
5709         if (netif_running(netdev))
5710                 e1000e_up(adapter);
5711         else
5712                 e1000e_reset(adapter);
5713
5714         clear_bit(__E1000_RESETTING, &adapter->state);
5715
5716         return 0;
5717 }
5718
5719 static int e1000_mii_ioctl(struct net_device *netdev, struct ifreq *ifr,
5720                            int cmd)
5721 {
5722         struct e1000_adapter *adapter = netdev_priv(netdev);
5723         struct mii_ioctl_data *data = if_mii(ifr);
5724
5725         if (adapter->hw.phy.media_type != e1000_media_type_copper)
5726                 return -EOPNOTSUPP;
5727
5728         switch (cmd) {
5729         case SIOCGMIIPHY:
5730                 data->phy_id = adapter->hw.phy.addr;
5731                 break;
5732         case SIOCGMIIREG:
5733                 e1000_phy_read_status(adapter);
5734
5735                 switch (data->reg_num & 0x1F) {
5736                 case MII_BMCR:
5737                         data->val_out = adapter->phy_regs.bmcr;
5738                         break;
5739                 case MII_BMSR:
5740                         data->val_out = adapter->phy_regs.bmsr;
5741                         break;
5742                 case MII_PHYSID1:
5743                         data->val_out = (adapter->hw.phy.id >> 16);
5744                         break;
5745                 case MII_PHYSID2:
5746                         data->val_out = (adapter->hw.phy.id & 0xFFFF);
5747                         break;
5748                 case MII_ADVERTISE:
5749                         data->val_out = adapter->phy_regs.advertise;
5750                         break;
5751                 case MII_LPA:
5752                         data->val_out = adapter->phy_regs.lpa;
5753                         break;
5754                 case MII_EXPANSION:
5755                         data->val_out = adapter->phy_regs.expansion;
5756                         break;
5757                 case MII_CTRL1000:
5758                         data->val_out = adapter->phy_regs.ctrl1000;
5759                         break;
5760                 case MII_STAT1000:
5761                         data->val_out = adapter->phy_regs.stat1000;
5762                         break;
5763                 case MII_ESTATUS:
5764                         data->val_out = adapter->phy_regs.estatus;
5765                         break;
5766                 default:
5767                         return -EIO;
5768                 }
5769                 break;
5770         case SIOCSMIIREG:
5771         default:
5772                 return -EOPNOTSUPP;
5773         }
5774         return 0;
5775 }
5776
5777 /**
5778  * e1000e_hwtstamp_ioctl - control hardware time stamping
5779  * @netdev: network interface device structure
5780  * @ifreq: interface request
5781  *
5782  * Outgoing time stamping can be enabled and disabled. Play nice and
5783  * disable it when requested, although it shouldn't cause any overhead
5784  * when no packet needs it. At most one packet in the queue may be
5785  * marked for time stamping, otherwise it would be impossible to tell
5786  * for sure to which packet the hardware time stamp belongs.
5787  *
5788  * Incoming time stamping has to be configured via the hardware filters.
5789  * Not all combinations are supported, in particular event type has to be
5790  * specified. Matching the kind of event packet is not supported, with the
5791  * exception of "all V2 events regardless of level 2 or 4".
5792  **/
5793 static int e1000e_hwtstamp_ioctl(struct net_device *netdev, struct ifreq *ifr)
5794 {
5795         struct e1000_adapter *adapter = netdev_priv(netdev);
5796         struct hwtstamp_config config;
5797         int ret_val;
5798
5799         if (copy_from_user(&config, ifr->ifr_data, sizeof(config)))
5800                 return -EFAULT;
5801
5802         adapter->hwtstamp_config = config;
5803
5804         ret_val = e1000e_config_hwtstamp(adapter);
5805         if (ret_val)
5806                 return ret_val;
5807
5808         config = adapter->hwtstamp_config;
5809
5810         switch (config.rx_filter) {
5811         case HWTSTAMP_FILTER_PTP_V2_L4_SYNC:
5812         case HWTSTAMP_FILTER_PTP_V2_L2_SYNC:
5813         case HWTSTAMP_FILTER_PTP_V2_SYNC:
5814         case HWTSTAMP_FILTER_PTP_V2_L4_DELAY_REQ:
5815         case HWTSTAMP_FILTER_PTP_V2_L2_DELAY_REQ:
5816         case HWTSTAMP_FILTER_PTP_V2_DELAY_REQ:
5817                 /* With V2 type filters which specify a Sync or Delay Request,
5818                  * Path Delay Request/Response messages are also time stamped
5819                  * by hardware so notify the caller the requested packets plus
5820                  * some others are time stamped.
5821                  */
5822                 config.rx_filter = HWTSTAMP_FILTER_SOME;
5823                 break;
5824         default:
5825                 break;
5826         }
5827
5828         return copy_to_user(ifr->ifr_data, &config,
5829                             sizeof(config)) ? -EFAULT : 0;
5830 }
5831
5832 static int e1000_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
5833 {
5834         switch (cmd) {
5835         case SIOCGMIIPHY:
5836         case SIOCGMIIREG:
5837         case SIOCSMIIREG:
5838                 return e1000_mii_ioctl(netdev, ifr, cmd);
5839         case SIOCSHWTSTAMP:
5840                 return e1000e_hwtstamp_ioctl(netdev, ifr);
5841         default:
5842                 return -EOPNOTSUPP;
5843         }
5844 }
5845
5846 static int e1000_init_phy_wakeup(struct e1000_adapter *adapter, u32 wufc)
5847 {
5848         struct e1000_hw *hw = &adapter->hw;
5849         u32 i, mac_reg;
5850         u16 phy_reg, wuc_enable;
5851         int retval;
5852
5853         /* copy MAC RARs to PHY RARs */
5854         e1000_copy_rx_addrs_to_phy_ich8lan(hw);
5855
5856         retval = hw->phy.ops.acquire(hw);
5857         if (retval) {
5858                 e_err("Could not acquire PHY\n");
5859                 return retval;
5860         }
5861
5862         /* Enable access to wakeup registers on and set page to BM_WUC_PAGE */
5863         retval = e1000_enable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5864         if (retval)
5865                 goto release;
5866
5867         /* copy MAC MTA to PHY MTA - only needed for pchlan */
5868         for (i = 0; i < adapter->hw.mac.mta_reg_count; i++) {
5869                 mac_reg = E1000_READ_REG_ARRAY(hw, E1000_MTA, i);
5870                 hw->phy.ops.write_reg_page(hw, BM_MTA(i),
5871                                            (u16)(mac_reg & 0xFFFF));
5872                 hw->phy.ops.write_reg_page(hw, BM_MTA(i) + 1,
5873                                            (u16)((mac_reg >> 16) & 0xFFFF));
5874         }
5875
5876         /* configure PHY Rx Control register */
5877         hw->phy.ops.read_reg_page(&adapter->hw, BM_RCTL, &phy_reg);
5878         mac_reg = er32(RCTL);
5879         if (mac_reg & E1000_RCTL_UPE)
5880                 phy_reg |= BM_RCTL_UPE;
5881         if (mac_reg & E1000_RCTL_MPE)
5882                 phy_reg |= BM_RCTL_MPE;
5883         phy_reg &= ~(BM_RCTL_MO_MASK);
5884         if (mac_reg & E1000_RCTL_MO_3)
5885                 phy_reg |= (((mac_reg & E1000_RCTL_MO_3) >> E1000_RCTL_MO_SHIFT)
5886                             << BM_RCTL_MO_SHIFT);
5887         if (mac_reg & E1000_RCTL_BAM)
5888                 phy_reg |= BM_RCTL_BAM;
5889         if (mac_reg & E1000_RCTL_PMCF)
5890                 phy_reg |= BM_RCTL_PMCF;
5891         mac_reg = er32(CTRL);
5892         if (mac_reg & E1000_CTRL_RFCE)
5893                 phy_reg |= BM_RCTL_RFCE;
5894         hw->phy.ops.write_reg_page(&adapter->hw, BM_RCTL, phy_reg);
5895
5896         /* enable PHY wakeup in MAC register */
5897         ew32(WUFC, wufc);
5898         ew32(WUC, E1000_WUC_PHY_WAKE | E1000_WUC_PME_EN);
5899
5900         /* configure and enable PHY wakeup in PHY registers */
5901         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUFC, wufc);
5902         hw->phy.ops.write_reg_page(&adapter->hw, BM_WUC, E1000_WUC_PME_EN);
5903
5904         /* activate PHY wakeup */
5905         wuc_enable |= BM_WUC_ENABLE_BIT | BM_WUC_HOST_WU_BIT;
5906         retval = e1000_disable_phy_wakeup_reg_access_bm(hw, &wuc_enable);
5907         if (retval)
5908                 e_err("Could not set PHY Host Wakeup bit\n");
5909 release:
5910         hw->phy.ops.release(hw);
5911
5912         return retval;
5913 }
5914
5915 static int __e1000_shutdown(struct pci_dev *pdev, bool runtime)
5916 {
5917         struct net_device *netdev = pci_get_drvdata(pdev);
5918         struct e1000_adapter *adapter = netdev_priv(netdev);
5919         struct e1000_hw *hw = &adapter->hw;
5920         u32 ctrl, ctrl_ext, rctl, status;
5921         /* Runtime suspend should only enable wakeup for link changes */
5922         u32 wufc = runtime ? E1000_WUFC_LNKC : adapter->wol;
5923         int retval = 0;
5924
5925         netif_device_detach(netdev);
5926
5927         if (netif_running(netdev)) {
5928                 int count = E1000_CHECK_RESET_COUNT;
5929
5930                 while (test_bit(__E1000_RESETTING, &adapter->state) && count--)
5931                         usleep_range(10000, 20000);
5932
5933                 WARN_ON(test_bit(__E1000_RESETTING, &adapter->state));
5934                 e1000e_down(adapter);
5935                 e1000_free_irq(adapter);
5936         }
5937         e1000e_reset_interrupt_capability(adapter);
5938
5939         status = er32(STATUS);
5940         if (status & E1000_STATUS_LU)
5941                 wufc &= ~E1000_WUFC_LNKC;
5942
5943         if (wufc) {
5944                 e1000_setup_rctl(adapter);
5945                 e1000e_set_rx_mode(netdev);
5946
5947                 /* turn on all-multi mode if wake on multicast is enabled */
5948                 if (wufc & E1000_WUFC_MC) {
5949                         rctl = er32(RCTL);
5950                         rctl |= E1000_RCTL_MPE;
5951                         ew32(RCTL, rctl);
5952                 }
5953
5954                 ctrl = er32(CTRL);
5955                 ctrl |= E1000_CTRL_ADVD3WUC;
5956                 if (!(adapter->flags2 & FLAG2_HAS_PHY_WAKEUP))
5957                         ctrl |= E1000_CTRL_EN_PHY_PWR_MGMT;
5958                 ew32(CTRL, ctrl);
5959
5960                 if (adapter->hw.phy.media_type == e1000_media_type_fiber ||
5961                     adapter->hw.phy.media_type ==
5962                     e1000_media_type_internal_serdes) {
5963                         /* keep the laser running in D3 */
5964                         ctrl_ext = er32(CTRL_EXT);
5965                         ctrl_ext |= E1000_CTRL_EXT_SDP3_DATA;
5966                         ew32(CTRL_EXT, ctrl_ext);
5967                 }
5968
5969                 if (adapter->flags & FLAG_IS_ICH)
5970                         e1000_suspend_workarounds_ich8lan(&adapter->hw);
5971
5972                 /* Allow time for pending master requests to run */
5973                 e1000e_disable_pcie_master(&adapter->hw);
5974
5975                 if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
5976                         /* enable wakeup by the PHY */
5977                         retval = e1000_init_phy_wakeup(adapter, wufc);
5978                         if (retval)
5979                                 return retval;
5980                 } else {
5981                         /* enable wakeup by the MAC */
5982                         ew32(WUFC, wufc);
5983                         ew32(WUC, E1000_WUC_PME_EN);
5984                 }
5985         } else {
5986                 ew32(WUC, 0);
5987                 ew32(WUFC, 0);
5988         }
5989
5990         if (adapter->hw.phy.type == e1000_phy_igp_3)
5991                 e1000e_igp3_phy_powerdown_workaround_ich8lan(&adapter->hw);
5992
5993         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
5994          * would have already happened in close and is redundant.
5995          */
5996         e1000e_release_hw_control(adapter);
5997
5998         pci_clear_master(pdev);
5999
6000         /* The pci-e switch on some quad port adapters will report a
6001          * correctable error when the MAC transitions from D0 to D3.  To
6002          * prevent this we need to mask off the correctable errors on the
6003          * downstream port of the pci-e switch.
6004          */
6005         if (adapter->flags & FLAG_IS_QUAD_PORT) {
6006                 struct pci_dev *us_dev = pdev->bus->self;
6007                 u16 devctl;
6008
6009                 pcie_capability_read_word(us_dev, PCI_EXP_DEVCTL, &devctl);
6010                 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL,
6011                                            (devctl & ~PCI_EXP_DEVCTL_CERE));
6012
6013                 pci_save_state(pdev);
6014                 pci_prepare_to_sleep(pdev);
6015
6016                 pcie_capability_write_word(us_dev, PCI_EXP_DEVCTL, devctl);
6017         }
6018
6019         return 0;
6020 }
6021
6022 #ifdef CONFIG_PCIEASPM
6023 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6024 {
6025         pci_disable_link_state_locked(pdev, state);
6026 }
6027 #else
6028 static void __e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6029 {
6030         u16 aspm_ctl = 0;
6031
6032         if (state & PCIE_LINK_STATE_L0S)
6033                 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L0S;
6034         if (state & PCIE_LINK_STATE_L1)
6035                 aspm_ctl |= PCI_EXP_LNKCTL_ASPM_L1;
6036
6037         /* Both device and parent should have the same ASPM setting.
6038          * Disable ASPM in downstream component first and then upstream.
6039          */
6040         pcie_capability_clear_word(pdev, PCI_EXP_LNKCTL, aspm_ctl);
6041
6042         if (pdev->bus->self)
6043                 pcie_capability_clear_word(pdev->bus->self, PCI_EXP_LNKCTL,
6044                                            aspm_ctl);
6045 }
6046 #endif
6047 static void e1000e_disable_aspm(struct pci_dev *pdev, u16 state)
6048 {
6049         dev_info(&pdev->dev, "Disabling ASPM %s %s\n",
6050                  (state & PCIE_LINK_STATE_L0S) ? "L0s" : "",
6051                  (state & PCIE_LINK_STATE_L1) ? "L1" : "");
6052
6053         __e1000e_disable_aspm(pdev, state);
6054 }
6055
6056 #ifdef CONFIG_PM
6057 static bool e1000e_pm_ready(struct e1000_adapter *adapter)
6058 {
6059         return !!adapter->tx_ring->buffer_info;
6060 }
6061
6062 static int __e1000_resume(struct pci_dev *pdev)
6063 {
6064         struct net_device *netdev = pci_get_drvdata(pdev);
6065         struct e1000_adapter *adapter = netdev_priv(netdev);
6066         struct e1000_hw *hw = &adapter->hw;
6067         u16 aspm_disable_flag = 0;
6068         u32 err;
6069
6070         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6071                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6072         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6073                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6074         if (aspm_disable_flag)
6075                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6076
6077         pci_set_master(pdev);
6078
6079         e1000e_set_interrupt_capability(adapter);
6080         if (netif_running(netdev)) {
6081                 err = e1000_request_irq(adapter);
6082                 if (err)
6083                         return err;
6084         }
6085
6086         if (hw->mac.type >= e1000_pch2lan)
6087                 e1000_resume_workarounds_pchlan(&adapter->hw);
6088
6089         e1000e_power_up_phy(adapter);
6090
6091         /* report the system wakeup cause from S3/S4 */
6092         if (adapter->flags2 & FLAG2_HAS_PHY_WAKEUP) {
6093                 u16 phy_data;
6094
6095                 e1e_rphy(&adapter->hw, BM_WUS, &phy_data);
6096                 if (phy_data) {
6097                         e_info("PHY Wakeup cause - %s\n",
6098                                phy_data & E1000_WUS_EX ? "Unicast Packet" :
6099                                phy_data & E1000_WUS_MC ? "Multicast Packet" :
6100                                phy_data & E1000_WUS_BC ? "Broadcast Packet" :
6101                                phy_data & E1000_WUS_MAG ? "Magic Packet" :
6102                                phy_data & E1000_WUS_LNKC ?
6103                                "Link Status Change" : "other");
6104                 }
6105                 e1e_wphy(&adapter->hw, BM_WUS, ~0);
6106         } else {
6107                 u32 wus = er32(WUS);
6108                 if (wus) {
6109                         e_info("MAC Wakeup cause - %s\n",
6110                                wus & E1000_WUS_EX ? "Unicast Packet" :
6111                                wus & E1000_WUS_MC ? "Multicast Packet" :
6112                                wus & E1000_WUS_BC ? "Broadcast Packet" :
6113                                wus & E1000_WUS_MAG ? "Magic Packet" :
6114                                wus & E1000_WUS_LNKC ? "Link Status Change" :
6115                                "other");
6116                 }
6117                 ew32(WUS, ~0);
6118         }
6119
6120         e1000e_reset(adapter);
6121
6122         e1000_init_manageability_pt(adapter);
6123
6124         if (netif_running(netdev))
6125                 e1000e_up(adapter);
6126
6127         netif_device_attach(netdev);
6128
6129         /* If the controller has AMT, do not set DRV_LOAD until the interface
6130          * is up.  For all other cases, let the f/w know that the h/w is now
6131          * under the control of the driver.
6132          */
6133         if (!(adapter->flags & FLAG_HAS_AMT))
6134                 e1000e_get_hw_control(adapter);
6135
6136         return 0;
6137 }
6138
6139 #ifdef CONFIG_PM_SLEEP
6140 static int e1000_suspend(struct device *dev)
6141 {
6142         struct pci_dev *pdev = to_pci_dev(dev);
6143
6144         return __e1000_shutdown(pdev, false);
6145 }
6146
6147 static int e1000_resume(struct device *dev)
6148 {
6149         struct pci_dev *pdev = to_pci_dev(dev);
6150         struct net_device *netdev = pci_get_drvdata(pdev);
6151         struct e1000_adapter *adapter = netdev_priv(netdev);
6152
6153         if (e1000e_pm_ready(adapter))
6154                 adapter->idle_check = true;
6155
6156         return __e1000_resume(pdev);
6157 }
6158 #endif /* CONFIG_PM_SLEEP */
6159
6160 #ifdef CONFIG_PM_RUNTIME
6161 static int e1000_runtime_suspend(struct device *dev)
6162 {
6163         struct pci_dev *pdev = to_pci_dev(dev);
6164         struct net_device *netdev = pci_get_drvdata(pdev);
6165         struct e1000_adapter *adapter = netdev_priv(netdev);
6166
6167         if (!e1000e_pm_ready(adapter))
6168                 return 0;
6169
6170         return __e1000_shutdown(pdev, true);
6171 }
6172
6173 static int e1000_idle(struct device *dev)
6174 {
6175         struct pci_dev *pdev = to_pci_dev(dev);
6176         struct net_device *netdev = pci_get_drvdata(pdev);
6177         struct e1000_adapter *adapter = netdev_priv(netdev);
6178
6179         if (!e1000e_pm_ready(adapter))
6180                 return 0;
6181
6182         if (adapter->idle_check) {
6183                 adapter->idle_check = false;
6184                 if (!e1000e_has_link(adapter))
6185                         pm_schedule_suspend(dev, MSEC_PER_SEC);
6186         }
6187
6188         return -EBUSY;
6189 }
6190
6191 static int e1000_runtime_resume(struct device *dev)
6192 {
6193         struct pci_dev *pdev = to_pci_dev(dev);
6194         struct net_device *netdev = pci_get_drvdata(pdev);
6195         struct e1000_adapter *adapter = netdev_priv(netdev);
6196
6197         if (!e1000e_pm_ready(adapter))
6198                 return 0;
6199
6200         adapter->idle_check = !dev->power.runtime_auto;
6201         return __e1000_resume(pdev);
6202 }
6203 #endif /* CONFIG_PM_RUNTIME */
6204 #endif /* CONFIG_PM */
6205
6206 static void e1000_shutdown(struct pci_dev *pdev)
6207 {
6208         __e1000_shutdown(pdev, false);
6209 }
6210
6211 #ifdef CONFIG_NET_POLL_CONTROLLER
6212
6213 static irqreturn_t e1000_intr_msix(int __always_unused irq, void *data)
6214 {
6215         struct net_device *netdev = data;
6216         struct e1000_adapter *adapter = netdev_priv(netdev);
6217
6218         if (adapter->msix_entries) {
6219                 int vector, msix_irq;
6220
6221                 vector = 0;
6222                 msix_irq = adapter->msix_entries[vector].vector;
6223                 disable_irq(msix_irq);
6224                 e1000_intr_msix_rx(msix_irq, netdev);
6225                 enable_irq(msix_irq);
6226
6227                 vector++;
6228                 msix_irq = adapter->msix_entries[vector].vector;
6229                 disable_irq(msix_irq);
6230                 e1000_intr_msix_tx(msix_irq, netdev);
6231                 enable_irq(msix_irq);
6232
6233                 vector++;
6234                 msix_irq = adapter->msix_entries[vector].vector;
6235                 disable_irq(msix_irq);
6236                 e1000_msix_other(msix_irq, netdev);
6237                 enable_irq(msix_irq);
6238         }
6239
6240         return IRQ_HANDLED;
6241 }
6242
6243 /**
6244  * e1000_netpoll
6245  * @netdev: network interface device structure
6246  *
6247  * Polling 'interrupt' - used by things like netconsole to send skbs
6248  * without having to re-enable interrupts. It's not called while
6249  * the interrupt routine is executing.
6250  */
6251 static void e1000_netpoll(struct net_device *netdev)
6252 {
6253         struct e1000_adapter *adapter = netdev_priv(netdev);
6254
6255         switch (adapter->int_mode) {
6256         case E1000E_INT_MODE_MSIX:
6257                 e1000_intr_msix(adapter->pdev->irq, netdev);
6258                 break;
6259         case E1000E_INT_MODE_MSI:
6260                 disable_irq(adapter->pdev->irq);
6261                 e1000_intr_msi(adapter->pdev->irq, netdev);
6262                 enable_irq(adapter->pdev->irq);
6263                 break;
6264         default:                /* E1000E_INT_MODE_LEGACY */
6265                 disable_irq(adapter->pdev->irq);
6266                 e1000_intr(adapter->pdev->irq, netdev);
6267                 enable_irq(adapter->pdev->irq);
6268                 break;
6269         }
6270 }
6271 #endif
6272
6273 /**
6274  * e1000_io_error_detected - called when PCI error is detected
6275  * @pdev: Pointer to PCI device
6276  * @state: The current pci connection state
6277  *
6278  * This function is called after a PCI bus error affecting
6279  * this device has been detected.
6280  */
6281 static pci_ers_result_t e1000_io_error_detected(struct pci_dev *pdev,
6282                                                 pci_channel_state_t state)
6283 {
6284         struct net_device *netdev = pci_get_drvdata(pdev);
6285         struct e1000_adapter *adapter = netdev_priv(netdev);
6286
6287         netif_device_detach(netdev);
6288
6289         if (state == pci_channel_io_perm_failure)
6290                 return PCI_ERS_RESULT_DISCONNECT;
6291
6292         if (netif_running(netdev))
6293                 e1000e_down(adapter);
6294         pci_disable_device(pdev);
6295
6296         /* Request a slot slot reset. */
6297         return PCI_ERS_RESULT_NEED_RESET;
6298 }
6299
6300 /**
6301  * e1000_io_slot_reset - called after the pci bus has been reset.
6302  * @pdev: Pointer to PCI device
6303  *
6304  * Restart the card from scratch, as if from a cold-boot. Implementation
6305  * resembles the first-half of the e1000_resume routine.
6306  */
6307 static pci_ers_result_t e1000_io_slot_reset(struct pci_dev *pdev)
6308 {
6309         struct net_device *netdev = pci_get_drvdata(pdev);
6310         struct e1000_adapter *adapter = netdev_priv(netdev);
6311         struct e1000_hw *hw = &adapter->hw;
6312         u16 aspm_disable_flag = 0;
6313         int err;
6314         pci_ers_result_t result;
6315
6316         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L0S)
6317                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6318         if (adapter->flags2 & FLAG2_DISABLE_ASPM_L1)
6319                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6320         if (aspm_disable_flag)
6321                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6322
6323         err = pci_enable_device_mem(pdev);
6324         if (err) {
6325                 dev_err(&pdev->dev,
6326                         "Cannot re-enable PCI device after reset.\n");
6327                 result = PCI_ERS_RESULT_DISCONNECT;
6328         } else {
6329                 pdev->state_saved = true;
6330                 pci_restore_state(pdev);
6331                 pci_set_master(pdev);
6332
6333                 pci_enable_wake(pdev, PCI_D3hot, 0);
6334                 pci_enable_wake(pdev, PCI_D3cold, 0);
6335
6336                 e1000e_reset(adapter);
6337                 ew32(WUS, ~0);
6338                 result = PCI_ERS_RESULT_RECOVERED;
6339         }
6340
6341         pci_cleanup_aer_uncorrect_error_status(pdev);
6342
6343         return result;
6344 }
6345
6346 /**
6347  * e1000_io_resume - called when traffic can start flowing again.
6348  * @pdev: Pointer to PCI device
6349  *
6350  * This callback is called when the error recovery driver tells us that
6351  * its OK to resume normal operation. Implementation resembles the
6352  * second-half of the e1000_resume routine.
6353  */
6354 static void e1000_io_resume(struct pci_dev *pdev)
6355 {
6356         struct net_device *netdev = pci_get_drvdata(pdev);
6357         struct e1000_adapter *adapter = netdev_priv(netdev);
6358
6359         e1000_init_manageability_pt(adapter);
6360
6361         if (netif_running(netdev)) {
6362                 if (e1000e_up(adapter)) {
6363                         dev_err(&pdev->dev,
6364                                 "can't bring device back up after reset\n");
6365                         return;
6366                 }
6367         }
6368
6369         netif_device_attach(netdev);
6370
6371         /* If the controller has AMT, do not set DRV_LOAD until the interface
6372          * is up.  For all other cases, let the f/w know that the h/w is now
6373          * under the control of the driver.
6374          */
6375         if (!(adapter->flags & FLAG_HAS_AMT))
6376                 e1000e_get_hw_control(adapter);
6377 }
6378
6379 static void e1000_print_device_info(struct e1000_adapter *adapter)
6380 {
6381         struct e1000_hw *hw = &adapter->hw;
6382         struct net_device *netdev = adapter->netdev;
6383         u32 ret_val;
6384         u8 pba_str[E1000_PBANUM_LENGTH];
6385
6386         /* print bus type/speed/width info */
6387         e_info("(PCI Express:2.5GT/s:%s) %pM\n",
6388                /* bus width */
6389                ((hw->bus.width == e1000_bus_width_pcie_x4) ? "Width x4" :
6390                 "Width x1"),
6391                /* MAC address */
6392                netdev->dev_addr);
6393         e_info("Intel(R) PRO/%s Network Connection\n",
6394                (hw->phy.type == e1000_phy_ife) ? "10/100" : "1000");
6395         ret_val = e1000_read_pba_string_generic(hw, pba_str,
6396                                                 E1000_PBANUM_LENGTH);
6397         if (ret_val)
6398                 strlcpy((char *)pba_str, "Unknown", sizeof(pba_str));
6399         e_info("MAC: %d, PHY: %d, PBA No: %s\n",
6400                hw->mac.type, hw->phy.type, pba_str);
6401 }
6402
6403 static void e1000_eeprom_checks(struct e1000_adapter *adapter)
6404 {
6405         struct e1000_hw *hw = &adapter->hw;
6406         int ret_val;
6407         u16 buf = 0;
6408
6409         if (hw->mac.type != e1000_82573)
6410                 return;
6411
6412         ret_val = e1000_read_nvm(hw, NVM_INIT_CONTROL2_REG, 1, &buf);
6413         le16_to_cpus(&buf);
6414         if (!ret_val && (!(buf & (1 << 0)))) {
6415                 /* Deep Smart Power Down (DSPD) */
6416                 dev_warn(&adapter->pdev->dev,
6417                          "Warning: detected DSPD enabled in EEPROM\n");
6418         }
6419 }
6420
6421 static int e1000_set_features(struct net_device *netdev,
6422                               netdev_features_t features)
6423 {
6424         struct e1000_adapter *adapter = netdev_priv(netdev);
6425         netdev_features_t changed = features ^ netdev->features;
6426
6427         if (changed & (NETIF_F_TSO | NETIF_F_TSO6))
6428                 adapter->flags |= FLAG_TSO_FORCE;
6429
6430         if (!(changed & (NETIF_F_HW_VLAN_CTAG_RX | NETIF_F_HW_VLAN_CTAG_TX |
6431                          NETIF_F_RXCSUM | NETIF_F_RXHASH | NETIF_F_RXFCS |
6432                          NETIF_F_RXALL)))
6433                 return 0;
6434
6435         if (changed & NETIF_F_RXFCS) {
6436                 if (features & NETIF_F_RXFCS) {
6437                         adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6438                 } else {
6439                         /* We need to take it back to defaults, which might mean
6440                          * stripping is still disabled at the adapter level.
6441                          */
6442                         if (adapter->flags2 & FLAG2_DFLT_CRC_STRIPPING)
6443                                 adapter->flags2 |= FLAG2_CRC_STRIPPING;
6444                         else
6445                                 adapter->flags2 &= ~FLAG2_CRC_STRIPPING;
6446                 }
6447         }
6448
6449         netdev->features = features;
6450
6451         if (netif_running(netdev))
6452                 e1000e_reinit_locked(adapter);
6453         else
6454                 e1000e_reset(adapter);
6455
6456         return 0;
6457 }
6458
6459 static const struct net_device_ops e1000e_netdev_ops = {
6460         .ndo_open               = e1000_open,
6461         .ndo_stop               = e1000_close,
6462         .ndo_start_xmit         = e1000_xmit_frame,
6463         .ndo_get_stats64        = e1000e_get_stats64,
6464         .ndo_set_rx_mode        = e1000e_set_rx_mode,
6465         .ndo_set_mac_address    = e1000_set_mac,
6466         .ndo_change_mtu         = e1000_change_mtu,
6467         .ndo_do_ioctl           = e1000_ioctl,
6468         .ndo_tx_timeout         = e1000_tx_timeout,
6469         .ndo_validate_addr      = eth_validate_addr,
6470
6471         .ndo_vlan_rx_add_vid    = e1000_vlan_rx_add_vid,
6472         .ndo_vlan_rx_kill_vid   = e1000_vlan_rx_kill_vid,
6473 #ifdef CONFIG_NET_POLL_CONTROLLER
6474         .ndo_poll_controller    = e1000_netpoll,
6475 #endif
6476         .ndo_set_features = e1000_set_features,
6477 };
6478
6479 /**
6480  * e1000_probe - Device Initialization Routine
6481  * @pdev: PCI device information struct
6482  * @ent: entry in e1000_pci_tbl
6483  *
6484  * Returns 0 on success, negative on failure
6485  *
6486  * e1000_probe initializes an adapter identified by a pci_dev structure.
6487  * The OS initialization, configuring of the adapter private structure,
6488  * and a hardware reset occur.
6489  **/
6490 static int e1000_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
6491 {
6492         struct net_device *netdev;
6493         struct e1000_adapter *adapter;
6494         struct e1000_hw *hw;
6495         const struct e1000_info *ei = e1000_info_tbl[ent->driver_data];
6496         resource_size_t mmio_start, mmio_len;
6497         resource_size_t flash_start, flash_len;
6498         static int cards_found;
6499         u16 aspm_disable_flag = 0;
6500         int bars, i, err, pci_using_dac;
6501         u16 eeprom_data = 0;
6502         u16 eeprom_apme_mask = E1000_EEPROM_APME;
6503
6504         if (ei->flags2 & FLAG2_DISABLE_ASPM_L0S)
6505                 aspm_disable_flag = PCIE_LINK_STATE_L0S;
6506         if (ei->flags2 & FLAG2_DISABLE_ASPM_L1)
6507                 aspm_disable_flag |= PCIE_LINK_STATE_L1;
6508         if (aspm_disable_flag)
6509                 e1000e_disable_aspm(pdev, aspm_disable_flag);
6510
6511         err = pci_enable_device_mem(pdev);
6512         if (err)
6513                 return err;
6514
6515         pci_using_dac = 0;
6516         err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(64));
6517         if (!err) {
6518                 err = dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
6519                 if (!err)
6520                         pci_using_dac = 1;
6521         } else {
6522                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6523                 if (err) {
6524                         err = dma_set_coherent_mask(&pdev->dev,
6525                                                     DMA_BIT_MASK(32));
6526                         if (err) {
6527                                 dev_err(&pdev->dev,
6528                                         "No usable DMA configuration, aborting\n");
6529                                 goto err_dma;
6530                         }
6531                 }
6532         }
6533
6534         bars = pci_select_bars(pdev, IORESOURCE_MEM);
6535         err = pci_request_selected_regions_exclusive(pdev, bars,
6536                                                      e1000e_driver_name);
6537         if (err)
6538                 goto err_pci_reg;
6539
6540         /* AER (Advanced Error Reporting) hooks */
6541         pci_enable_pcie_error_reporting(pdev);
6542
6543         pci_set_master(pdev);
6544         /* PCI config space info */
6545         err = pci_save_state(pdev);
6546         if (err)
6547                 goto err_alloc_etherdev;
6548
6549         err = -ENOMEM;
6550         netdev = alloc_etherdev(sizeof(struct e1000_adapter));
6551         if (!netdev)
6552                 goto err_alloc_etherdev;
6553
6554         SET_NETDEV_DEV(netdev, &pdev->dev);
6555
6556         netdev->irq = pdev->irq;
6557
6558         pci_set_drvdata(pdev, netdev);
6559         adapter = netdev_priv(netdev);
6560         hw = &adapter->hw;
6561         adapter->netdev = netdev;
6562         adapter->pdev = pdev;
6563         adapter->ei = ei;
6564         adapter->pba = ei->pba;
6565         adapter->flags = ei->flags;
6566         adapter->flags2 = ei->flags2;
6567         adapter->hw.adapter = adapter;
6568         adapter->hw.mac.type = ei->mac;
6569         adapter->max_hw_frame_size = ei->max_hw_frame_size;
6570         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
6571
6572         mmio_start = pci_resource_start(pdev, 0);
6573         mmio_len = pci_resource_len(pdev, 0);
6574
6575         err = -EIO;
6576         adapter->hw.hw_addr = ioremap(mmio_start, mmio_len);
6577         if (!adapter->hw.hw_addr)
6578                 goto err_ioremap;
6579
6580         if ((adapter->flags & FLAG_HAS_FLASH) &&
6581             (pci_resource_flags(pdev, 1) & IORESOURCE_MEM)) {
6582                 flash_start = pci_resource_start(pdev, 1);
6583                 flash_len = pci_resource_len(pdev, 1);
6584                 adapter->hw.flash_address = ioremap(flash_start, flash_len);
6585                 if (!adapter->hw.flash_address)
6586                         goto err_flashmap;
6587         }
6588
6589         /* Set default EEE advertisement */
6590         if (adapter->flags2 & FLAG2_HAS_EEE)
6591                 adapter->eee_advert = MDIO_EEE_100TX | MDIO_EEE_1000T;
6592
6593         /* construct the net_device struct */
6594         netdev->netdev_ops = &e1000e_netdev_ops;
6595         e1000e_set_ethtool_ops(netdev);
6596         netdev->watchdog_timeo = 5 * HZ;
6597         netif_napi_add(netdev, &adapter->napi, e1000e_poll, 64);
6598         strlcpy(netdev->name, pci_name(pdev), sizeof(netdev->name));
6599
6600         netdev->mem_start = mmio_start;
6601         netdev->mem_end = mmio_start + mmio_len;
6602
6603         adapter->bd_number = cards_found++;
6604
6605         e1000e_check_options(adapter);
6606
6607         /* setup adapter struct */
6608         err = e1000_sw_init(adapter);
6609         if (err)
6610                 goto err_sw_init;
6611
6612         memcpy(&hw->mac.ops, ei->mac_ops, sizeof(hw->mac.ops));
6613         memcpy(&hw->nvm.ops, ei->nvm_ops, sizeof(hw->nvm.ops));
6614         memcpy(&hw->phy.ops, ei->phy_ops, sizeof(hw->phy.ops));
6615
6616         err = ei->get_variants(adapter);
6617         if (err)
6618                 goto err_hw_init;
6619
6620         if ((adapter->flags & FLAG_IS_ICH) &&
6621             (adapter->flags & FLAG_READ_ONLY_NVM))
6622                 e1000e_write_protect_nvm_ich8lan(&adapter->hw);
6623
6624         hw->mac.ops.get_bus_info(&adapter->hw);
6625
6626         adapter->hw.phy.autoneg_wait_to_complete = 0;
6627
6628         /* Copper options */
6629         if (adapter->hw.phy.media_type == e1000_media_type_copper) {
6630                 adapter->hw.phy.mdix = AUTO_ALL_MODES;
6631                 adapter->hw.phy.disable_polarity_correction = 0;
6632                 adapter->hw.phy.ms_type = e1000_ms_hw_default;
6633         }
6634
6635         if (hw->phy.ops.check_reset_block && hw->phy.ops.check_reset_block(hw))
6636                 dev_info(&pdev->dev,
6637                          "PHY reset is blocked due to SOL/IDER session.\n");
6638
6639         /* Set initial default active device features */
6640         netdev->features = (NETIF_F_SG |
6641                             NETIF_F_HW_VLAN_CTAG_RX |
6642                             NETIF_F_HW_VLAN_CTAG_TX |
6643                             NETIF_F_TSO |
6644                             NETIF_F_TSO6 |
6645                             NETIF_F_RXHASH |
6646                             NETIF_F_RXCSUM |
6647                             NETIF_F_HW_CSUM);
6648
6649         /* Set user-changeable features (subset of all device features) */
6650         netdev->hw_features = netdev->features;
6651         netdev->hw_features |= NETIF_F_RXFCS;
6652         netdev->priv_flags |= IFF_SUPP_NOFCS;
6653         netdev->hw_features |= NETIF_F_RXALL;
6654
6655         if (adapter->flags & FLAG_HAS_HW_VLAN_FILTER)
6656                 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
6657
6658         netdev->vlan_features |= (NETIF_F_SG |
6659                                   NETIF_F_TSO |
6660                                   NETIF_F_TSO6 |
6661                                   NETIF_F_HW_CSUM);
6662
6663         netdev->priv_flags |= IFF_UNICAST_FLT;
6664
6665         if (pci_using_dac) {
6666                 netdev->features |= NETIF_F_HIGHDMA;
6667                 netdev->vlan_features |= NETIF_F_HIGHDMA;
6668         }
6669
6670         if (e1000e_enable_mng_pass_thru(&adapter->hw))
6671                 adapter->flags |= FLAG_MNG_PT_ENABLED;
6672
6673         /* before reading the NVM, reset the controller to
6674          * put the device in a known good starting state
6675          */
6676         adapter->hw.mac.ops.reset_hw(&adapter->hw);
6677
6678         /* systems with ASPM and others may see the checksum fail on the first
6679          * attempt. Let's give it a few tries
6680          */
6681         for (i = 0;; i++) {
6682                 if (e1000_validate_nvm_checksum(&adapter->hw) >= 0)
6683                         break;
6684                 if (i == 2) {
6685                         dev_err(&pdev->dev, "The NVM Checksum Is Not Valid\n");
6686                         err = -EIO;
6687                         goto err_eeprom;
6688                 }
6689         }
6690
6691         e1000_eeprom_checks(adapter);
6692
6693         /* copy the MAC address */
6694         if (e1000e_read_mac_addr(&adapter->hw))
6695                 dev_err(&pdev->dev,
6696                         "NVM Read Error while reading MAC address\n");
6697
6698         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
6699
6700         if (!is_valid_ether_addr(netdev->dev_addr)) {
6701                 dev_err(&pdev->dev, "Invalid MAC Address: %pM\n",
6702                         netdev->dev_addr);
6703                 err = -EIO;
6704                 goto err_eeprom;
6705         }
6706
6707         init_timer(&adapter->watchdog_timer);
6708         adapter->watchdog_timer.function = e1000_watchdog;
6709         adapter->watchdog_timer.data = (unsigned long)adapter;
6710
6711         init_timer(&adapter->phy_info_timer);
6712         adapter->phy_info_timer.function = e1000_update_phy_info;
6713         adapter->phy_info_timer.data = (unsigned long)adapter;
6714
6715         INIT_WORK(&adapter->reset_task, e1000_reset_task);
6716         INIT_WORK(&adapter->watchdog_task, e1000_watchdog_task);
6717         INIT_WORK(&adapter->downshift_task, e1000e_downshift_workaround);
6718         INIT_WORK(&adapter->update_phy_task, e1000e_update_phy_task);
6719         INIT_WORK(&adapter->print_hang_task, e1000_print_hw_hang);
6720
6721         /* Initialize link parameters. User can change them with ethtool */
6722         adapter->hw.mac.autoneg = 1;
6723         adapter->fc_autoneg = true;
6724         adapter->hw.fc.requested_mode = e1000_fc_default;
6725         adapter->hw.fc.current_mode = e1000_fc_default;
6726         adapter->hw.phy.autoneg_advertised = 0x2f;
6727
6728         /* ring size defaults */
6729         adapter->rx_ring->count = E1000_DEFAULT_RXD;
6730         adapter->tx_ring->count = E1000_DEFAULT_TXD;
6731
6732         /* Initial Wake on LAN setting - If APM wake is enabled in
6733          * the EEPROM, enable the ACPI Magic Packet filter
6734          */
6735         if (adapter->flags & FLAG_APME_IN_WUC) {
6736                 /* APME bit in EEPROM is mapped to WUC.APME */
6737                 eeprom_data = er32(WUC);
6738                 eeprom_apme_mask = E1000_WUC_APME;
6739                 if ((hw->mac.type > e1000_ich10lan) &&
6740                     (eeprom_data & E1000_WUC_PHY_WAKE))
6741                         adapter->flags2 |= FLAG2_HAS_PHY_WAKEUP;
6742         } else if (adapter->flags & FLAG_APME_IN_CTRL3) {
6743                 if (adapter->flags & FLAG_APME_CHECK_PORT_B &&
6744                     (adapter->hw.bus.func == 1))
6745                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_B,
6746                                        1, &eeprom_data);
6747                 else
6748                         e1000_read_nvm(&adapter->hw, NVM_INIT_CONTROL3_PORT_A,
6749                                        1, &eeprom_data);
6750         }
6751
6752         /* fetch WoL from EEPROM */
6753         if (eeprom_data & eeprom_apme_mask)
6754                 adapter->eeprom_wol |= E1000_WUFC_MAG;
6755
6756         /* now that we have the eeprom settings, apply the special cases
6757          * where the eeprom may be wrong or the board simply won't support
6758          * wake on lan on a particular port
6759          */
6760         if (!(adapter->flags & FLAG_HAS_WOL))
6761                 adapter->eeprom_wol = 0;
6762
6763         /* initialize the wol settings based on the eeprom settings */
6764         adapter->wol = adapter->eeprom_wol;
6765
6766         /* make sure adapter isn't asleep if manageability is enabled */
6767         if (adapter->wol || (adapter->flags & FLAG_MNG_PT_ENABLED) ||
6768             (hw->mac.ops.check_mng_mode(hw)))
6769                 device_wakeup_enable(&pdev->dev);
6770
6771         /* save off EEPROM version number */
6772         e1000_read_nvm(&adapter->hw, 5, 1, &adapter->eeprom_vers);
6773
6774         /* reset the hardware with the new settings */
6775         e1000e_reset(adapter);
6776
6777         /* If the controller has AMT, do not set DRV_LOAD until the interface
6778          * is up.  For all other cases, let the f/w know that the h/w is now
6779          * under the control of the driver.
6780          */
6781         if (!(adapter->flags & FLAG_HAS_AMT))
6782                 e1000e_get_hw_control(adapter);
6783
6784         strlcpy(netdev->name, "eth%d", sizeof(netdev->name));
6785         err = register_netdev(netdev);
6786         if (err)
6787                 goto err_register;
6788
6789         /* carrier off reporting is important to ethtool even BEFORE open */
6790         netif_carrier_off(netdev);
6791
6792         /* init PTP hardware clock */
6793         e1000e_ptp_init(adapter);
6794
6795         e1000_print_device_info(adapter);
6796
6797         if (pci_dev_run_wake(pdev))
6798                 pm_runtime_put_noidle(&pdev->dev);
6799
6800         return 0;
6801
6802 err_register:
6803         if (!(adapter->flags & FLAG_HAS_AMT))
6804                 e1000e_release_hw_control(adapter);
6805 err_eeprom:
6806         if (hw->phy.ops.check_reset_block && !hw->phy.ops.check_reset_block(hw))
6807                 e1000_phy_hw_reset(&adapter->hw);
6808 err_hw_init:
6809         kfree(adapter->tx_ring);
6810         kfree(adapter->rx_ring);
6811 err_sw_init:
6812         if (adapter->hw.flash_address)
6813                 iounmap(adapter->hw.flash_address);
6814         e1000e_reset_interrupt_capability(adapter);
6815 err_flashmap:
6816         iounmap(adapter->hw.hw_addr);
6817 err_ioremap:
6818         free_netdev(netdev);
6819 err_alloc_etherdev:
6820         pci_release_selected_regions(pdev,
6821                                      pci_select_bars(pdev, IORESOURCE_MEM));
6822 err_pci_reg:
6823 err_dma:
6824         pci_disable_device(pdev);
6825         return err;
6826 }
6827
6828 /**
6829  * e1000_remove - Device Removal Routine
6830  * @pdev: PCI device information struct
6831  *
6832  * e1000_remove is called by the PCI subsystem to alert the driver
6833  * that it should release a PCI device.  The could be caused by a
6834  * Hot-Plug event, or because the driver is going to be removed from
6835  * memory.
6836  **/
6837 static void e1000_remove(struct pci_dev *pdev)
6838 {
6839         struct net_device *netdev = pci_get_drvdata(pdev);
6840         struct e1000_adapter *adapter = netdev_priv(netdev);
6841         bool down = test_bit(__E1000_DOWN, &adapter->state);
6842
6843         e1000e_ptp_remove(adapter);
6844
6845         /* The timers may be rescheduled, so explicitly disable them
6846          * from being rescheduled.
6847          */
6848         if (!down)
6849                 set_bit(__E1000_DOWN, &adapter->state);
6850         del_timer_sync(&adapter->watchdog_timer);
6851         del_timer_sync(&adapter->phy_info_timer);
6852
6853         cancel_work_sync(&adapter->reset_task);
6854         cancel_work_sync(&adapter->watchdog_task);
6855         cancel_work_sync(&adapter->downshift_task);
6856         cancel_work_sync(&adapter->update_phy_task);
6857         cancel_work_sync(&adapter->print_hang_task);
6858
6859         if (adapter->flags & FLAG_HAS_HW_TIMESTAMP) {
6860                 cancel_work_sync(&adapter->tx_hwtstamp_work);
6861                 if (adapter->tx_hwtstamp_skb) {
6862                         dev_kfree_skb_any(adapter->tx_hwtstamp_skb);
6863                         adapter->tx_hwtstamp_skb = NULL;
6864                 }
6865         }
6866
6867         if (!(netdev->flags & IFF_UP))
6868                 e1000_power_down_phy(adapter);
6869
6870         /* Don't lie to e1000_close() down the road. */
6871         if (!down)
6872                 clear_bit(__E1000_DOWN, &adapter->state);
6873         unregister_netdev(netdev);
6874
6875         if (pci_dev_run_wake(pdev))
6876                 pm_runtime_get_noresume(&pdev->dev);
6877
6878         /* Release control of h/w to f/w.  If f/w is AMT enabled, this
6879          * would have already happened in close and is redundant.
6880          */
6881         e1000e_release_hw_control(adapter);
6882
6883         e1000e_reset_interrupt_capability(adapter);
6884         kfree(adapter->tx_ring);
6885         kfree(adapter->rx_ring);
6886
6887         iounmap(adapter->hw.hw_addr);
6888         if (adapter->hw.flash_address)
6889                 iounmap(adapter->hw.flash_address);
6890         pci_release_selected_regions(pdev,
6891                                      pci_select_bars(pdev, IORESOURCE_MEM));
6892
6893         free_netdev(netdev);
6894
6895         /* AER disable */
6896         pci_disable_pcie_error_reporting(pdev);
6897
6898         pci_disable_device(pdev);
6899 }
6900
6901 /* PCI Error Recovery (ERS) */
6902 static const struct pci_error_handlers e1000_err_handler = {
6903         .error_detected = e1000_io_error_detected,
6904         .slot_reset = e1000_io_slot_reset,
6905         .resume = e1000_io_resume,
6906 };
6907
6908 static DEFINE_PCI_DEVICE_TABLE(e1000_pci_tbl) = {
6909         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_COPPER), board_82571 },
6910         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_FIBER), board_82571 },
6911         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER), board_82571 },
6912         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_COPPER_LP),
6913           board_82571 },
6914         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_QUAD_FIBER), board_82571 },
6915         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES), board_82571 },
6916         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_DUAL), board_82571 },
6917         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571EB_SERDES_QUAD), board_82571 },
6918         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82571PT_QUAD_COPPER), board_82571 },
6919
6920         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI), board_82572 },
6921         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_COPPER), board_82572 },
6922         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_FIBER), board_82572 },
6923         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82572EI_SERDES), board_82572 },
6924
6925         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E), board_82573 },
6926         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573E_IAMT), board_82573 },
6927         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82573L), board_82573 },
6928
6929         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574L), board_82574 },
6930         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82574LA), board_82574 },
6931         { PCI_VDEVICE(INTEL, E1000_DEV_ID_82583V), board_82583 },
6932
6933         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_DPT),
6934           board_80003es2lan },
6935         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_COPPER_SPT),
6936           board_80003es2lan },
6937         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_DPT),
6938           board_80003es2lan },
6939         { PCI_VDEVICE(INTEL, E1000_DEV_ID_80003ES2LAN_SERDES_SPT),
6940           board_80003es2lan },
6941
6942         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE), board_ich8lan },
6943         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_G), board_ich8lan },
6944         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IFE_GT), board_ich8lan },
6945         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_AMT), board_ich8lan },
6946         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_C), board_ich8lan },
6947         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M), board_ich8lan },
6948         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_IGP_M_AMT), board_ich8lan },
6949         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH8_82567V_3), board_ich8lan },
6950
6951         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE), board_ich9lan },
6952         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_G), board_ich9lan },
6953         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IFE_GT), board_ich9lan },
6954         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_AMT), board_ich9lan },
6955         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_C), board_ich9lan },
6956         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_BM), board_ich9lan },
6957         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M), board_ich9lan },
6958         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_AMT), board_ich9lan },
6959         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH9_IGP_M_V), board_ich9lan },
6960
6961         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LM), board_ich9lan },
6962         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_LF), board_ich9lan },
6963         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_R_BM_V), board_ich9lan },
6964
6965         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LM), board_ich10lan },
6966         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_LF), board_ich10lan },
6967         { PCI_VDEVICE(INTEL, E1000_DEV_ID_ICH10_D_BM_V), board_ich10lan },
6968
6969         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LM), board_pchlan },
6970         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_M_HV_LC), board_pchlan },
6971         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DM), board_pchlan },
6972         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_D_HV_DC), board_pchlan },
6973
6974         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_LM), board_pch2lan },
6975         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH2_LV_V), board_pch2lan },
6976
6977         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_LM), board_pch_lpt },
6978         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPT_I217_V), board_pch_lpt },
6979         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_LM), board_pch_lpt },
6980         { PCI_VDEVICE(INTEL, E1000_DEV_ID_PCH_LPTLP_I218_V), board_pch_lpt },
6981
6982         { 0, 0, 0, 0, 0, 0, 0 } /* terminate list */
6983 };
6984 MODULE_DEVICE_TABLE(pci, e1000_pci_tbl);
6985
6986 #ifdef CONFIG_PM
6987 static const struct dev_pm_ops e1000_pm_ops = {
6988         SET_SYSTEM_SLEEP_PM_OPS(e1000_suspend, e1000_resume)
6989         SET_RUNTIME_PM_OPS(e1000_runtime_suspend, e1000_runtime_resume,
6990                            e1000_idle)
6991 };
6992 #endif
6993
6994 /* PCI Device API Driver */
6995 static struct pci_driver e1000_driver = {
6996         .name     = e1000e_driver_name,
6997         .id_table = e1000_pci_tbl,
6998         .probe    = e1000_probe,
6999         .remove   = e1000_remove,
7000 #ifdef CONFIG_PM
7001         .driver   = {
7002                 .pm = &e1000_pm_ops,
7003         },
7004 #endif
7005         .shutdown = e1000_shutdown,
7006         .err_handler = &e1000_err_handler
7007 };
7008
7009 /**
7010  * e1000_init_module - Driver Registration Routine
7011  *
7012  * e1000_init_module is the first routine called when the driver is
7013  * loaded. All it does is register with the PCI subsystem.
7014  **/
7015 static int __init e1000_init_module(void)
7016 {
7017         int ret;
7018         pr_info("Intel(R) PRO/1000 Network Driver - %s\n",
7019                 e1000e_driver_version);
7020         pr_info("Copyright(c) 1999 - 2013 Intel Corporation.\n");
7021         ret = pci_register_driver(&e1000_driver);
7022
7023         return ret;
7024 }
7025 module_init(e1000_init_module);
7026
7027 /**
7028  * e1000_exit_module - Driver Exit Cleanup Routine
7029  *
7030  * e1000_exit_module is called just before the driver is removed
7031  * from memory.
7032  **/
7033 static void __exit e1000_exit_module(void)
7034 {
7035         pci_unregister_driver(&e1000_driver);
7036 }
7037 module_exit(e1000_exit_module);
7038
7039 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
7040 MODULE_DESCRIPTION("Intel(R) PRO/1000 Network Driver");
7041 MODULE_LICENSE("GPL");
7042 MODULE_VERSION(DRV_VERSION);
7043
7044 /* netdev.c */