drivers/net/ethernet/intel/ixgbe/ixgbe_main.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2011 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  24   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  25
  26 *******************************************************************************/
  27
  28 #include <linux/types.h>
  29 #include <linux/module.h>
  30 #include <linux/pci.h>
  31 #include <linux/netdevice.h>
  32 #include <linux/vmalloc.h>
  33 #include <linux/string.h>
  34 #include <linux/in.h>
  35 #include <linux/interrupt.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/sctp.h>
  39 #include <linux/pkt_sched.h>
  40 #include <linux/ipv6.h>
  41 #include <linux/slab.h>
  42 #include <net/checksum.h>
  43 #include <net/ip6_checksum.h>
  44 #include <linux/ethtool.h>
  45 #include <linux/if.h>
  46 #include <linux/if_vlan.h>
  47 #include <linux/prefetch.h>
  48 #include <scsi/fc/fc_fcoe.h>
  49
  50 #include "ixgbe.h"
  51 #include "ixgbe_common.h"
  52 #include "ixgbe_dcb_82599.h"
  53 #include "ixgbe_sriov.h"
  54
  55 char ixgbe_driver_name[] = "ixgbe";
  56 static const char ixgbe_driver_string[] =
  57                               "Intel(R) 10 Gigabit PCI Express Network Driver";
  58 #define MAJ 3
  59 #define MIN 6
  60 #define BUILD 7
  61 #define DRV_VERSION __stringify(MAJ) "." __stringify(MIN) "." \
  62         __stringify(BUILD) "-k"
  63 const char ixgbe_driver_version[] = DRV_VERSION;
  64 static const char ixgbe_copyright[] =
  65                                 "Copyright (c) 1999-2011 Intel Corporation.";
  66
  67 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  68         [board_82598] = &ixgbe_82598_info,
  69         [board_82599] = &ixgbe_82599_info,
  70         [board_X540] = &ixgbe_X540_info,
  71 };
  72
  73 /* ixgbe_pci_tbl - PCI Device ID Table
  74  *
  75  * Wildcard entries (PCI_ANY_ID) should come last
  76  * Last entry must be all 0s
  77  *
  78  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  79  *   Class, Class Mask, private data (not used) }
  80  */
  81 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
  82         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598), board_82598 },
  83         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT), board_82598 },
  84         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT), board_82598 },
  85         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT), board_82598 },
  86         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2), board_82598 },
  87         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4), board_82598 },
  88         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT), board_82598 },
  89         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT), board_82598 },
  90         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM), board_82598 },
  91         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR), board_82598 },
  92         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM), board_82598 },
  93         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX), board_82598 },
  94         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4), board_82599 },
  95         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM), board_82599 },
  96         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR), board_82599 },
  97         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP), board_82599 },
  98         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM), board_82599 },
  99         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ), board_82599 },
 100         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4), board_82599 },
 101         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_BACKPLANE_FCOE), board_82599 },
 102         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_FCOE), board_82599 },
 103         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM), board_82599 },
 104         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE), board_82599 },
 105         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_X540T), board_X540 },
 106         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_SF2), board_82599 },
 107         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_LS), board_82599 },
 108         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599EN_SFP), board_82599 },
 109         /* required last entry */
 110         {0, }
 111 };
 112 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
 113
 114 #ifdef CONFIG_IXGBE_DCA
 115 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
 116                             void *p);
 117 static struct notifier_block dca_notifier = {
 118         .notifier_call = ixgbe_notify_dca,
 119         .next          = NULL,
 120         .priority      = 0
 121 };
 122 #endif
 123
 124 #ifdef CONFIG_PCI_IOV
 125 static unsigned int max_vfs;
 126 module_param(max_vfs, uint, 0);
 127 MODULE_PARM_DESC(max_vfs,
 128                  "Maximum number of virtual functions to allocate per physical function");
 129 #endif /* CONFIG_PCI_IOV */
 130
 131 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 132 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 133 MODULE_LICENSE("GPL");
 134 MODULE_VERSION(DRV_VERSION);
 135
 136 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 137
 138 static void ixgbe_service_event_schedule(struct ixgbe_adapter *adapter)
 139 {
 140         if (!test_bit(__IXGBE_DOWN, &adapter->state) &&
 141             !test_and_set_bit(__IXGBE_SERVICE_SCHED, &adapter->state))
 142                 schedule_work(&adapter->service_task);
 143 }
 144
 145 static void ixgbe_service_event_complete(struct ixgbe_adapter *adapter)
 146 {
 147         BUG_ON(!test_bit(__IXGBE_SERVICE_SCHED, &adapter->state));
 148
 149         /* flush memory to make sure state is correct before next watchog */
 150         smp_mb__before_clear_bit();
 151         clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
 152 }
 153
 154 struct ixgbe_reg_info {
 155         u32 ofs;
 156         char *name;
 157 };
 158
 159 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
 160
 161         /* General Registers */
 162         {IXGBE_CTRL, "CTRL"},
 163         {IXGBE_STATUS, "STATUS"},
 164         {IXGBE_CTRL_EXT, "CTRL_EXT"},
 165
 166         /* Interrupt Registers */
 167         {IXGBE_EICR, "EICR"},
 168
 169         /* RX Registers */
 170         {IXGBE_SRRCTL(0), "SRRCTL"},
 171         {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
 172         {IXGBE_RDLEN(0), "RDLEN"},
 173         {IXGBE_RDH(0), "RDH"},
 174         {IXGBE_RDT(0), "RDT"},
 175         {IXGBE_RXDCTL(0), "RXDCTL"},
 176         {IXGBE_RDBAL(0), "RDBAL"},
 177         {IXGBE_RDBAH(0), "RDBAH"},
 178
 179         /* TX Registers */
 180         {IXGBE_TDBAL(0), "TDBAL"},
 181         {IXGBE_TDBAH(0), "TDBAH"},
 182         {IXGBE_TDLEN(0), "TDLEN"},
 183         {IXGBE_TDH(0), "TDH"},
 184         {IXGBE_TDT(0), "TDT"},
 185         {IXGBE_TXDCTL(0), "TXDCTL"},
 186
 187         /* List Terminator */
 188         {}
 189 };
 190
 191
 192 /*
 193  * ixgbe_regdump - register printout routine
 194  */
 195 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
 196 {
 197         int i = 0, j = 0;
 198         char rname[16];
 199         u32 regs[64];
 200
 201         switch (reginfo->ofs) {
 202         case IXGBE_SRRCTL(0):
 203                 for (i = 0; i < 64; i++)
 204                         regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
 205                 break;
 206         case IXGBE_DCA_RXCTRL(0):
 207                 for (i = 0; i < 64; i++)
 208                         regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
 209                 break;
 210         case IXGBE_RDLEN(0):
 211                 for (i = 0; i < 64; i++)
 212                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
 213                 break;
 214         case IXGBE_RDH(0):
 215                 for (i = 0; i < 64; i++)
 216                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
 217                 break;
 218         case IXGBE_RDT(0):
 219                 for (i = 0; i < 64; i++)
 220                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
 221                 break;
 222         case IXGBE_RXDCTL(0):
 223                 for (i = 0; i < 64; i++)
 224                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
 225                 break;
 226         case IXGBE_RDBAL(0):
 227                 for (i = 0; i < 64; i++)
 228                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
 229                 break;
 230         case IXGBE_RDBAH(0):
 231                 for (i = 0; i < 64; i++)
 232                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
 233                 break;
 234         case IXGBE_TDBAL(0):
 235                 for (i = 0; i < 64; i++)
 236                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
 237                 break;
 238         case IXGBE_TDBAH(0):
 239                 for (i = 0; i < 64; i++)
 240                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
 241                 break;
 242         case IXGBE_TDLEN(0):
 243                 for (i = 0; i < 64; i++)
 244                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
 245                 break;
 246         case IXGBE_TDH(0):
 247                 for (i = 0; i < 64; i++)
 248                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
 249                 break;
 250         case IXGBE_TDT(0):
 251                 for (i = 0; i < 64; i++)
 252                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
 253                 break;
 254         case IXGBE_TXDCTL(0):
 255                 for (i = 0; i < 64; i++)
 256                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
 257                 break;
 258         default:
 259                 pr_info("%-15s %08x\n", reginfo->name,
 260                         IXGBE_READ_REG(hw, reginfo->ofs));
 261                 return;
 262         }
 263
 264         for (i = 0; i < 8; i++) {
 265                 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
 266                 pr_err("%-15s", rname);
 267                 for (j = 0; j < 8; j++)
 268                         pr_cont(" %08x", regs[i*8+j]);
 269                 pr_cont("\n");
 270         }
 271
 272 }
 273
 274 /*
 275  * ixgbe_dump - Print registers, tx-rings and rx-rings
 276  */
 277 static void ixgbe_dump(struct ixgbe_adapter *adapter)
 278 {
 279         struct net_device *netdev = adapter->netdev;
 280         struct ixgbe_hw *hw = &adapter->hw;
 281         struct ixgbe_reg_info *reginfo;
 282         int n = 0;
 283         struct ixgbe_ring *tx_ring;
 284         struct ixgbe_tx_buffer *tx_buffer_info;
 285         union ixgbe_adv_tx_desc *tx_desc;
 286         struct my_u0 { u64 a; u64 b; } *u0;
 287         struct ixgbe_ring *rx_ring;
 288         union ixgbe_adv_rx_desc *rx_desc;
 289         struct ixgbe_rx_buffer *rx_buffer_info;
 290         u32 staterr;
 291         int i = 0;
 292
 293         if (!netif_msg_hw(adapter))
 294                 return;
 295
 296         /* Print netdevice Info */
 297         if (netdev) {
 298                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 299                 pr_info("Device Name     state            "
 300                         "trans_start      last_rx\n");
 301                 pr_info("%-15s %016lX %016lX %016lX\n",
 302                         netdev->name,
 303                         netdev->state,
 304                         netdev->trans_start,
 305                         netdev->last_rx);
 306         }
 307
 308         /* Print Registers */
 309         dev_info(&adapter->pdev->dev, "Register Dump\n");
 310         pr_info(" Register Name   Value\n");
 311         for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
 312              reginfo->name; reginfo++) {
 313                 ixgbe_regdump(hw, reginfo);
 314         }
 315
 316         /* Print TX Ring Summary */
 317         if (!netdev || !netif_running(netdev))
 318                 goto exit;
 319
 320         dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
 321         pr_info("Queue [NTU] [NTC] [bi(ntc)->dma  ] leng ntw timestamp\n");
 322         for (n = 0; n < adapter->num_tx_queues; n++) {
 323                 tx_ring = adapter->tx_ring[n];
 324                 tx_buffer_info =
 325                         &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
 326                 pr_info(" %5d %5X %5X %016llX %04X %p %016llX\n",
 327                            n, tx_ring->next_to_use, tx_ring->next_to_clean,
 328                            (u64)tx_buffer_info->dma,
 329                            tx_buffer_info->length,
 330                            tx_buffer_info->next_to_watch,
 331                            (u64)tx_buffer_info->time_stamp);
 332         }
 333
 334         /* Print TX Rings */
 335         if (!netif_msg_tx_done(adapter))
 336                 goto rx_ring_summary;
 337
 338         dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
 339
 340         /* Transmit Descriptor Formats
 341          *
 342          * Advanced Transmit Descriptor
 343          *   +--------------------------------------------------------------+
 344          * 0 |         Buffer Address [63:0]                                |
 345          *   +--------------------------------------------------------------+
 346          * 8 |  PAYLEN  | PORTS  | IDX | STA | DCMD  |DTYP |  RSV |  DTALEN |
 347          *   +--------------------------------------------------------------+
 348          *   63       46 45    40 39 36 35 32 31   24 23 20 19              0
 349          */
 350
 351         for (n = 0; n < adapter->num_tx_queues; n++) {
 352                 tx_ring = adapter->tx_ring[n];
 353                 pr_info("------------------------------------\n");
 354                 pr_info("TX QUEUE INDEX = %d\n", tx_ring->queue_index);
 355                 pr_info("------------------------------------\n");
 356                 pr_info("T [desc]     [address 63:0  ] "
 357                         "[PlPOIdStDDt Ln] [bi->dma       ] "
 358                         "leng  ntw timestamp        bi->skb\n");
 359
 360                 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 361                         tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
 362                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 363                         u0 = (struct my_u0 *)tx_desc;
 364                         pr_info("T [0x%03X]    %016llX %016llX %016llX"
 365                                 " %04X  %p %016llX %p", i,
 366                                 le64_to_cpu(u0->a),
 367                                 le64_to_cpu(u0->b),
 368                                 (u64)tx_buffer_info->dma,
 369                                 tx_buffer_info->length,
 370                                 tx_buffer_info->next_to_watch,
 371                                 (u64)tx_buffer_info->time_stamp,
 372                                 tx_buffer_info->skb);
 373                         if (i == tx_ring->next_to_use &&
 374                                 i == tx_ring->next_to_clean)
 375                                 pr_cont(" NTC/U\n");
 376                         else if (i == tx_ring->next_to_use)
 377                                 pr_cont(" NTU\n");
 378                         else if (i == tx_ring->next_to_clean)
 379                                 pr_cont(" NTC\n");
 380                         else
 381                                 pr_cont("\n");
 382
 383                         if (netif_msg_pktdata(adapter) &&
 384                                 tx_buffer_info->dma != 0)
 385                                 print_hex_dump(KERN_INFO, "",
 386                                         DUMP_PREFIX_ADDRESS, 16, 1,
 387                                         phys_to_virt(tx_buffer_info->dma),
 388                                         tx_buffer_info->length, true);
 389                 }
 390         }
 391
 392         /* Print RX Rings Summary */
 393 rx_ring_summary:
 394         dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
 395         pr_info("Queue [NTU] [NTC]\n");
 396         for (n = 0; n < adapter->num_rx_queues; n++) {
 397                 rx_ring = adapter->rx_ring[n];
 398                 pr_info("%5d %5X %5X\n",
 399                         n, rx_ring->next_to_use, rx_ring->next_to_clean);
 400         }
 401
 402         /* Print RX Rings */
 403         if (!netif_msg_rx_status(adapter))
 404                 goto exit;
 405
 406         dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
 407
 408         /* Advanced Receive Descriptor (Read) Format
 409          *    63                                           1        0
 410          *    +-----------------------------------------------------+
 411          *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
 412          *    +----------------------------------------------+------+
 413          *  8 |       Header Buffer Address [63:1]           |  DD  |
 414          *    +-----------------------------------------------------+
 415          *
 416          *
 417          * Advanced Receive Descriptor (Write-Back) Format
 418          *
 419          *   63       48 47    32 31  30      21 20 16 15   4 3     0
 420          *   +------------------------------------------------------+
 421          * 0 | Packet     IP     |SPH| HDR_LEN   | RSV|Packet|  RSS |
 422          *   | Checksum   Ident  |   |           |    | Type | Type |
 423          *   +------------------------------------------------------+
 424          * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 425          *   +------------------------------------------------------+
 426          *   63       48 47    32 31            20 19               0
 427          */
 428         for (n = 0; n < adapter->num_rx_queues; n++) {
 429                 rx_ring = adapter->rx_ring[n];
 430                 pr_info("------------------------------------\n");
 431                 pr_info("RX QUEUE INDEX = %d\n", rx_ring->queue_index);
 432                 pr_info("------------------------------------\n");
 433                 pr_info("R  [desc]      [ PktBuf     A0] "
 434                         "[  HeadBuf   DD] [bi->dma       ] [bi->skb] "
 435                         "<-- Adv Rx Read format\n");
 436                 pr_info("RWB[desc]      [PcsmIpSHl PtRs] "
 437                         "[vl er S cks ln] ---------------- [bi->skb] "
 438                         "<-- Adv Rx Write-Back format\n");
 439
 440                 for (i = 0; i < rx_ring->count; i++) {
 441                         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 442                         rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
 443                         u0 = (struct my_u0 *)rx_desc;
 444                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 445                         if (staterr & IXGBE_RXD_STAT_DD) {
 446                                 /* Descriptor Done */
 447                                 pr_info("RWB[0x%03X]     %016llX "
 448                                         "%016llX ---------------- %p", i,
 449                                         le64_to_cpu(u0->a),
 450                                         le64_to_cpu(u0->b),
 451                                         rx_buffer_info->skb);
 452                         } else {
 453                                 pr_info("R  [0x%03X]     %016llX "
 454                                         "%016llX %016llX %p", i,
 455                                         le64_to_cpu(u0->a),
 456                                         le64_to_cpu(u0->b),
 457                                         (u64)rx_buffer_info->dma,
 458                                         rx_buffer_info->skb);
 459
 460                                 if (netif_msg_pktdata(adapter)) {
 461                                         print_hex_dump(KERN_INFO, "",
 462                                            DUMP_PREFIX_ADDRESS, 16, 1,
 463                                            phys_to_virt(rx_buffer_info->dma),
 464                                            rx_ring->rx_buf_len, true);
 465
 466                                         if (rx_ring->rx_buf_len
 467                                                 < IXGBE_RXBUFFER_2K)
 468                                                 print_hex_dump(KERN_INFO, "",
 469                                                   DUMP_PREFIX_ADDRESS, 16, 1,
 470                                                   phys_to_virt(
 471                                                     rx_buffer_info->page_dma +
 472                                                     rx_buffer_info->page_offset
 473                                                   ),
 474                                                   PAGE_SIZE/2, true);
 475                                 }
 476                         }
 477
 478                         if (i == rx_ring->next_to_use)
 479                                 pr_cont(" NTU\n");
 480                         else if (i == rx_ring->next_to_clean)
 481                                 pr_cont(" NTC\n");
 482                         else
 483                                 pr_cont("\n");
 484
 485                 }
 486         }
 487
 488 exit:
 489         return;
 490 }
 491
 492 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 493 {
 494         u32 ctrl_ext;
 495
 496         /* Let firmware take over control of h/w */
 497         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 498         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 499                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 500 }
 501
 502 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 503 {
 504         u32 ctrl_ext;
 505
 506         /* Let firmware know the driver has taken over */
 507         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 508         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 509                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 510 }
 511
 512 /*
 513  * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 514  * @adapter: pointer to adapter struct
 515  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 516  * @queue: queue to map the corresponding interrupt to
 517  * @msix_vector: the vector to map to the corresponding queue
 518  *
 519  */
 520 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
 521                            u8 queue, u8 msix_vector)
 522 {
 523         u32 ivar, index;
 524         struct ixgbe_hw *hw = &adapter->hw;
 525         switch (hw->mac.type) {
 526         case ixgbe_mac_82598EB:
 527                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 528                 if (direction == -1)
 529                         direction = 0;
 530                 index = (((direction * 64) + queue) >> 2) & 0x1F;
 531                 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
 532                 ivar &= ~(0xFF << (8 * (queue & 0x3)));
 533                 ivar |= (msix_vector << (8 * (queue & 0x3)));
 534                 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
 535                 break;
 536         case ixgbe_mac_82599EB:
 537         case ixgbe_mac_X540:
 538                 if (direction == -1) {
 539                         /* other causes */
 540                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 541                         index = ((queue & 1) * 8);
 542                         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
 543                         ivar &= ~(0xFF << index);
 544                         ivar |= (msix_vector << index);
 545                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
 546                         break;
 547                 } else {
 548                         /* tx or rx causes */
 549                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 550                         index = ((16 * (queue & 1)) + (8 * direction));
 551                         ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
 552                         ivar &= ~(0xFF << index);
 553                         ivar |= (msix_vector << index);
 554                         IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
 555                         break;
 556                 }
 557         default:
 558                 break;
 559         }
 560 }
 561
 562 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
 563                                           u64 qmask)
 564 {
 565         u32 mask;
 566
 567         switch (adapter->hw.mac.type) {
 568         case ixgbe_mac_82598EB:
 569                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
 570                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
 571                 break;
 572         case ixgbe_mac_82599EB:
 573         case ixgbe_mac_X540:
 574                 mask = (qmask & 0xFFFFFFFF);
 575                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
 576                 mask = (qmask >> 32);
 577                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
 578                 break;
 579         default:
 580                 break;
 581         }
 582 }
 583
 584 static inline void ixgbe_unmap_tx_resource(struct ixgbe_ring *ring,
 585                                            struct ixgbe_tx_buffer *tx_buffer)
 586 {
 587         if (tx_buffer->dma) {
 588                 if (tx_buffer->tx_flags & IXGBE_TX_FLAGS_MAPPED_AS_PAGE)
 589                         dma_unmap_page(ring->dev,
 590                                        tx_buffer->dma,
 591                                        tx_buffer->length,
 592                                        DMA_TO_DEVICE);
 593                 else
 594                         dma_unmap_single(ring->dev,
 595                                          tx_buffer->dma,
 596                                          tx_buffer->length,
 597                                          DMA_TO_DEVICE);
 598         }
 599         tx_buffer->dma = 0;
 600 }
 601
 602 void ixgbe_unmap_and_free_tx_resource(struct ixgbe_ring *tx_ring,
 603                                       struct ixgbe_tx_buffer *tx_buffer_info)
 604 {
 605         ixgbe_unmap_tx_resource(tx_ring, tx_buffer_info);
 606         if (tx_buffer_info->skb)
 607                 dev_kfree_skb_any(tx_buffer_info->skb);
 608         tx_buffer_info->skb = NULL;
 609         /* tx_buffer_info must be completely set up in the transmit path */
 610 }
 611
 612 static void ixgbe_update_xoff_received(struct ixgbe_adapter *adapter)
 613 {
 614         struct ixgbe_hw *hw = &adapter->hw;
 615         struct ixgbe_hw_stats *hwstats = &adapter->stats;
 616         u32 data = 0;
 617         u32 xoff[8] = {0};
 618         int i;
 619
 620         if ((hw->fc.current_mode == ixgbe_fc_full) ||
 621             (hw->fc.current_mode == ixgbe_fc_rx_pause)) {
 622                 switch (hw->mac.type) {
 623                 case ixgbe_mac_82598EB:
 624                         data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
 625                         break;
 626                 default:
 627                         data = IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
 628                 }
 629                 hwstats->lxoffrxc += data;
 630
 631                 /* refill credits (no tx hang) if we received xoff */
 632                 if (!data)
 633                         return;
 634
 635                 for (i = 0; i < adapter->num_tx_queues; i++)
 636                         clear_bit(__IXGBE_HANG_CHECK_ARMED,
 637                                   &adapter->tx_ring[i]->state);
 638                 return;
 639         } else if (!(adapter->dcb_cfg.pfc_mode_enable))
 640                 return;
 641
 642         /* update stats for each tc, only valid with PFC enabled */
 643         for (i = 0; i < MAX_TX_PACKET_BUFFERS; i++) {
 644                 switch (hw->mac.type) {
 645                 case ixgbe_mac_82598EB:
 646                         xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXC(i));
 647                         break;
 648                 default:
 649                         xoff[i] = IXGBE_READ_REG(hw, IXGBE_PXOFFRXCNT(i));
 650                 }
 651                 hwstats->pxoffrxc[i] += xoff[i];
 652         }
 653
 654         /* disarm tx queues that have received xoff frames */
 655         for (i = 0; i < adapter->num_tx_queues; i++) {
 656                 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
 657                 u8 tc = tx_ring->dcb_tc;
 658
 659                 if (xoff[tc])
 660                         clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
 661         }
 662 }
 663
 664 static u64 ixgbe_get_tx_completed(struct ixgbe_ring *ring)
 665 {
 666         return ring->tx_stats.completed;
 667 }
 668
 669 static u64 ixgbe_get_tx_pending(struct ixgbe_ring *ring)
 670 {
 671         struct ixgbe_adapter *adapter = netdev_priv(ring->netdev);
 672         struct ixgbe_hw *hw = &adapter->hw;
 673
 674         u32 head = IXGBE_READ_REG(hw, IXGBE_TDH(ring->reg_idx));
 675         u32 tail = IXGBE_READ_REG(hw, IXGBE_TDT(ring->reg_idx));
 676
 677         if (head != tail)
 678                 return (head < tail) ?
 679                         tail - head : (tail + ring->count - head);
 680
 681         return 0;
 682 }
 683
 684 static inline bool ixgbe_check_tx_hang(struct ixgbe_ring *tx_ring)
 685 {
 686         u32 tx_done = ixgbe_get_tx_completed(tx_ring);
 687         u32 tx_done_old = tx_ring->tx_stats.tx_done_old;
 688         u32 tx_pending = ixgbe_get_tx_pending(tx_ring);
 689         bool ret = false;
 690
 691         clear_check_for_tx_hang(tx_ring);
 692
 693         /*
 694          * Check for a hung queue, but be thorough. This verifies
 695          * that a transmit has been completed since the previous
 696          * check AND there is at least one packet pending. The
 697          * ARMED bit is set to indicate a potential hang. The
 698          * bit is cleared if a pause frame is received to remove
 699          * false hang detection due to PFC or 802.3x frames. By
 700          * requiring this to fail twice we avoid races with
 701          * pfc clearing the ARMED bit and conditions where we
 702          * run the check_tx_hang logic with a transmit completion
 703          * pending but without time to complete it yet.
 704          */
 705         if ((tx_done_old == tx_done) && tx_pending) {
 706                 /* make sure it is true for two checks in a row */
 707                 ret = test_and_set_bit(__IXGBE_HANG_CHECK_ARMED,
 708                                        &tx_ring->state);
 709         } else {
 710                 /* update completed stats and continue */
 711                 tx_ring->tx_stats.tx_done_old = tx_done;
 712                 /* reset the countdown */
 713                 clear_bit(__IXGBE_HANG_CHECK_ARMED, &tx_ring->state);
 714         }
 715
 716         return ret;
 717 }
 718
 719 /**
 720  * ixgbe_tx_timeout_reset - initiate reset due to Tx timeout
 721  * @adapter: driver private struct
 722  **/
 723 static void ixgbe_tx_timeout_reset(struct ixgbe_adapter *adapter)
 724 {
 725
 726         /* Do the reset outside of interrupt context */
 727         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
 728                 adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
 729                 ixgbe_service_event_schedule(adapter);
 730         }
 731 }
 732
 733 /**
 734  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 735  * @q_vector: structure containing interrupt and ring information
 736  * @tx_ring: tx ring to clean
 737  **/
 738 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 739                                struct ixgbe_ring *tx_ring)
 740 {
 741         struct ixgbe_adapter *adapter = q_vector->adapter;
 742         struct ixgbe_tx_buffer *tx_buffer;
 743         union ixgbe_adv_tx_desc *tx_desc;
 744         unsigned int total_bytes = 0, total_packets = 0;
 745         unsigned int budget = q_vector->tx.work_limit;
 746         u16 i = tx_ring->next_to_clean;
 747
 748         tx_buffer = &tx_ring->tx_buffer_info[i];
 749         tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
 750
 751         for (; budget; budget--) {
 752                 union ixgbe_adv_tx_desc *eop_desc = tx_buffer->next_to_watch;
 753
 754                 /* if next_to_watch is not set then there is no work pending */
 755                 if (!eop_desc)
 756                         break;
 757
 758                 /* if DD is not set pending work has not been completed */
 759                 if (!(eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)))
 760                         break;
 761
 762                 /* count the packet as being completed */
 763                 tx_ring->tx_stats.completed++;
 764
 765                 /* clear next_to_watch to prevent false hangs */
 766                 tx_buffer->next_to_watch = NULL;
 767
 768                 /* prevent any other reads prior to eop_desc being verified */
 769                 rmb();
 770
 771                 do {
 772                         ixgbe_unmap_tx_resource(tx_ring, tx_buffer);
 773                         tx_desc->wb.status = 0;
 774                         if (likely(tx_desc == eop_desc)) {
 775                                 eop_desc = NULL;
 776                                 dev_kfree_skb_any(tx_buffer->skb);
 777                                 tx_buffer->skb = NULL;
 778
 779                                 total_bytes += tx_buffer->bytecount;
 780                                 total_packets += tx_buffer->gso_segs;
 781                         }
 782
 783                         tx_buffer++;
 784                         tx_desc++;
 785                         i++;
 786                         if (unlikely(i == tx_ring->count)) {
 787                                 i = 0;
 788
 789                                 tx_buffer = tx_ring->tx_buffer_info;
 790                                 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
 791                         }
 792
 793                 } while (eop_desc);
 794         }
 795
 796         tx_ring->next_to_clean = i;
 797         u64_stats_update_begin(&tx_ring->syncp);
 798         tx_ring->stats.bytes += total_bytes;
 799         tx_ring->stats.packets += total_packets;
 800         u64_stats_update_end(&tx_ring->syncp);
 801         q_vector->tx.total_bytes += total_bytes;
 802         q_vector->tx.total_packets += total_packets;
 803
 804         if (check_for_tx_hang(tx_ring) && ixgbe_check_tx_hang(tx_ring)) {
 805                 /* schedule immediate reset if we believe we hung */
 806                 struct ixgbe_hw *hw = &adapter->hw;
 807                 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
 808                 e_err(drv, "Detected Tx Unit Hang\n"
 809                         "  Tx Queue             <%d>\n"
 810                         "  TDH, TDT             <%x>, <%x>\n"
 811                         "  next_to_use          <%x>\n"
 812                         "  next_to_clean        <%x>\n"
 813                         "tx_buffer_info[next_to_clean]\n"
 814                         "  time_stamp           <%lx>\n"
 815                         "  jiffies              <%lx>\n",
 816                         tx_ring->queue_index,
 817                         IXGBE_READ_REG(hw, IXGBE_TDH(tx_ring->reg_idx)),
 818                         IXGBE_READ_REG(hw, IXGBE_TDT(tx_ring->reg_idx)),
 819                         tx_ring->next_to_use, i,
 820                         tx_ring->tx_buffer_info[i].time_stamp, jiffies);
 821
 822                 netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
 823
 824                 e_info(probe,
 825                        "tx hang %d detected on queue %d, resetting adapter\n",
 826                         adapter->tx_timeout_count + 1, tx_ring->queue_index);
 827
 828                 /* schedule immediate reset if we believe we hung */
 829                 ixgbe_tx_timeout_reset(adapter);
 830
 831                 /* the adapter is about to reset, no point in enabling stuff */
 832                 return true;
 833         }
 834
 835 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 836         if (unlikely(total_packets && netif_carrier_ok(tx_ring->netdev) &&
 837                      (ixgbe_desc_unused(tx_ring) >= TX_WAKE_THRESHOLD))) {
 838                 /* Make sure that anybody stopping the queue after this
 839                  * sees the new next_to_clean.
 840                  */
 841                 smp_mb();
 842                 if (__netif_subqueue_stopped(tx_ring->netdev, tx_ring->queue_index) &&
 843                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 844                         netif_wake_subqueue(tx_ring->netdev, tx_ring->queue_index);
 845                         ++tx_ring->tx_stats.restart_queue;
 846                 }
 847         }
 848
 849         return !!budget;
 850 }
 851
 852 #ifdef CONFIG_IXGBE_DCA
 853 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
 854                                 struct ixgbe_ring *rx_ring,
 855                                 int cpu)
 856 {
 857         struct ixgbe_hw *hw = &adapter->hw;
 858         u32 rxctrl;
 859         u8 reg_idx = rx_ring->reg_idx;
 860
 861         rxctrl = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(reg_idx));
 862         switch (hw->mac.type) {
 863         case ixgbe_mac_82598EB:
 864                 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 865                 rxctrl |= dca3_get_tag(rx_ring->dev, cpu);
 866                 break;
 867         case ixgbe_mac_82599EB:
 868         case ixgbe_mac_X540:
 869                 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
 870                 rxctrl |= (dca3_get_tag(rx_ring->dev, cpu) <<
 871                            IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
 872                 break;
 873         default:
 874                 break;
 875         }
 876         rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 877         rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 878         rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
 879         IXGBE_WRITE_REG(hw, IXGBE_DCA_RXCTRL(reg_idx), rxctrl);
 880 }
 881
 882 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 883                                 struct ixgbe_ring *tx_ring,
 884                                 int cpu)
 885 {
 886         struct ixgbe_hw *hw = &adapter->hw;
 887         u32 txctrl;
 888         u8 reg_idx = tx_ring->reg_idx;
 889
 890         switch (hw->mac.type) {
 891         case ixgbe_mac_82598EB:
 892                 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(reg_idx));
 893                 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 894                 txctrl |= dca3_get_tag(tx_ring->dev, cpu);
 895                 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 896                 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(reg_idx), txctrl);
 897                 break;
 898         case ixgbe_mac_82599EB:
 899         case ixgbe_mac_X540:
 900                 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx));
 901                 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
 902                 txctrl |= (dca3_get_tag(tx_ring->dev, cpu) <<
 903                            IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
 904                 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 905                 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(reg_idx), txctrl);
 906                 break;
 907         default:
 908                 break;
 909         }
 910 }
 911
 912 static void ixgbe_update_dca(struct ixgbe_q_vector *q_vector)
 913 {
 914         struct ixgbe_adapter *adapter = q_vector->adapter;
 915         struct ixgbe_ring *ring;
 916         int cpu = get_cpu();
 917
 918         if (q_vector->cpu == cpu)
 919                 goto out_no_update;
 920
 921         for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
 922                 ixgbe_update_tx_dca(adapter, ring, cpu);
 923
 924         for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
 925                 ixgbe_update_rx_dca(adapter, ring, cpu);
 926
 927         q_vector->cpu = cpu;
 928 out_no_update:
 929         put_cpu();
 930 }
 931
 932 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
 933 {
 934         int num_q_vectors;
 935         int i;
 936
 937         if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
 938                 return;
 939
 940         /* always use CB2 mode, difference is masked in the CB driver */
 941         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
 942
 943         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
 944                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 945         else
 946                 num_q_vectors = 1;
 947
 948         for (i = 0; i < num_q_vectors; i++) {
 949                 adapter->q_vector[i]->cpu = -1;
 950                 ixgbe_update_dca(adapter->q_vector[i]);
 951         }
 952 }
 953
 954 static int __ixgbe_notify_dca(struct device *dev, void *data)
 955 {
 956         struct ixgbe_adapter *adapter = dev_get_drvdata(dev);
 957         unsigned long event = *(unsigned long *)data;
 958
 959         if (!(adapter->flags & IXGBE_FLAG_DCA_CAPABLE))
 960                 return 0;
 961
 962         switch (event) {
 963         case DCA_PROVIDER_ADD:
 964                 /* if we're already enabled, don't do it again */
 965                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 966                         break;
 967                 if (dca_add_requester(dev) == 0) {
 968                         adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
 969                         ixgbe_setup_dca(adapter);
 970                         break;
 971                 }
 972                 /* Fall Through since DCA is disabled. */
 973         case DCA_PROVIDER_REMOVE:
 974                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
 975                         dca_remove_requester(dev);
 976                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
 977                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
 978                 }
 979                 break;
 980         }
 981
 982         return 0;
 983 }
 984 #endif /* CONFIG_IXGBE_DCA */
 985
 986 static inline void ixgbe_rx_hash(union ixgbe_adv_rx_desc *rx_desc,
 987                                  struct sk_buff *skb)
 988 {
 989         skb->rxhash = le32_to_cpu(rx_desc->wb.lower.hi_dword.rss);
 990 }
 991
 992 /**
 993  * ixgbe_rx_is_fcoe - check the rx desc for incoming pkt type
 994  * @adapter: address of board private structure
 995  * @rx_desc: advanced rx descriptor
 996  *
 997  * Returns : true if it is FCoE pkt
 998  */
 999 static inline bool ixgbe_rx_is_fcoe(struct ixgbe_adapter *adapter,
1000                                     union ixgbe_adv_rx_desc *rx_desc)
1001 {
1002         __le16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1003
1004         return (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
1005                ((pkt_info & cpu_to_le16(IXGBE_RXDADV_PKTTYPE_ETQF_MASK)) ==
1006                 (cpu_to_le16(IXGBE_ETQF_FILTER_FCOE <<
1007                              IXGBE_RXDADV_PKTTYPE_ETQF_SHIFT)));
1008 }
1009
1010 /**
1011  * ixgbe_receive_skb - Send a completed packet up the stack
1012  * @adapter: board private structure
1013  * @skb: packet to send up
1014  * @status: hardware indication of status of receive
1015  * @rx_ring: rx descriptor ring (for a specific queue) to setup
1016  * @rx_desc: rx descriptor
1017  **/
1018 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
1019                               struct sk_buff *skb, u8 status,
1020                               struct ixgbe_ring *ring,
1021                               union ixgbe_adv_rx_desc *rx_desc)
1022 {
1023         struct ixgbe_adapter *adapter = q_vector->adapter;
1024         struct napi_struct *napi = &q_vector->napi;
1025         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
1026         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
1027
1028         if (is_vlan && (tag & VLAN_VID_MASK))
1029                 __vlan_hwaccel_put_tag(skb, tag);
1030
1031         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL))
1032                 napi_gro_receive(napi, skb);
1033         else
1034                 netif_rx(skb);
1035 }
1036
1037 /**
1038  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
1039  * @adapter: address of board private structure
1040  * @status_err: hardware indication of status of receive
1041  * @skb: skb currently being received and modified
1042  * @status_err: status error value of last descriptor in packet
1043  **/
1044 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
1045                                      union ixgbe_adv_rx_desc *rx_desc,
1046                                      struct sk_buff *skb,
1047                                      u32 status_err)
1048 {
1049         skb->ip_summed = CHECKSUM_NONE;
1050
1051         /* Rx csum disabled */
1052         if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
1053                 return;
1054
1055         /* if IP and error */
1056         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
1057             (status_err & IXGBE_RXDADV_ERR_IPE)) {
1058                 adapter->hw_csum_rx_error++;
1059                 return;
1060         }
1061
1062         if (!(status_err & IXGBE_RXD_STAT_L4CS))
1063                 return;
1064
1065         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1066                 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1067
1068                 /*
1069                  * 82599 errata, UDP frames with a 0 checksum can be marked as
1070                  * checksum errors.
1071                  */
1072                 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1073                     (adapter->hw.mac.type == ixgbe_mac_82599EB))
1074                         return;
1075
1076                 adapter->hw_csum_rx_error++;
1077                 return;
1078         }
1079
1080         /* It must be a TCP or UDP packet with a valid checksum */
1081         skb->ip_summed = CHECKSUM_UNNECESSARY;
1082 }
1083
1084 static inline void ixgbe_release_rx_desc(struct ixgbe_ring *rx_ring, u32 val)
1085 {
1086         /*
1087          * Force memory writes to complete before letting h/w
1088          * know there are new descriptors to fetch.  (Only
1089          * applicable for weak-ordered memory model archs,
1090          * such as IA-64).
1091          */
1092         wmb();
1093         writel(val, rx_ring->tail);
1094 }
1095
1096 /**
1097  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1098  * @rx_ring: ring to place buffers on
1099  * @cleaned_count: number of buffers to replace
1100  **/
1101 void ixgbe_alloc_rx_buffers(struct ixgbe_ring *rx_ring, u16 cleaned_count)
1102 {
1103         union ixgbe_adv_rx_desc *rx_desc;
1104         struct ixgbe_rx_buffer *bi;
1105         struct sk_buff *skb;
1106         u16 i = rx_ring->next_to_use;
1107
1108         /* do nothing if no valid netdev defined */
1109         if (!rx_ring->netdev)
1110                 return;
1111
1112         while (cleaned_count--) {
1113                 rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1114                 bi = &rx_ring->rx_buffer_info[i];
1115                 skb = bi->skb;
1116
1117                 if (!skb) {
1118                         skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
1119                                                         rx_ring->rx_buf_len);
1120                         if (!skb) {
1121                                 rx_ring->rx_stats.alloc_rx_buff_failed++;
1122                                 goto no_buffers;
1123                         }
1124                         /* initialize queue mapping */
1125                         skb_record_rx_queue(skb, rx_ring->queue_index);
1126                         bi->skb = skb;
1127                 }
1128
1129                 if (!bi->dma) {
1130                         bi->dma = dma_map_single(rx_ring->dev,
1131                                                  skb->data,
1132                                                  rx_ring->rx_buf_len,
1133                                                  DMA_FROM_DEVICE);
1134                         if (dma_mapping_error(rx_ring->dev, bi->dma)) {
1135                                 rx_ring->rx_stats.alloc_rx_buff_failed++;
1136                                 bi->dma = 0;
1137                                 goto no_buffers;
1138                         }
1139                 }
1140
1141                 if (ring_is_ps_enabled(rx_ring)) {
1142                         if (!bi->page) {
1143                                 bi->page = netdev_alloc_page(rx_ring->netdev);
1144                                 if (!bi->page) {
1145                                         rx_ring->rx_stats.alloc_rx_page_failed++;
1146                                         goto no_buffers;
1147                                 }
1148                         }
1149
1150                         if (!bi->page_dma) {
1151                                 /* use a half page if we're re-using */
1152                                 bi->page_offset ^= PAGE_SIZE / 2;
1153                                 bi->page_dma = dma_map_page(rx_ring->dev,
1154                                                             bi->page,
1155                                                             bi->page_offset,
1156                                                             PAGE_SIZE / 2,
1157                                                             DMA_FROM_DEVICE);
1158                                 if (dma_mapping_error(rx_ring->dev,
1159                                                       bi->page_dma)) {
1160                                         rx_ring->rx_stats.alloc_rx_page_failed++;
1161                                         bi->page_dma = 0;
1162                                         goto no_buffers;
1163                                 }
1164                         }
1165
1166                         /* Refresh the desc even if buffer_addrs didn't change
1167                          * because each write-back erases this info. */
1168                         rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1169                         rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1170                 } else {
1171                         rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1172                         rx_desc->read.hdr_addr = 0;
1173                 }
1174
1175                 i++;
1176                 if (i == rx_ring->count)
1177                         i = 0;
1178         }
1179
1180 no_buffers:
1181         if (rx_ring->next_to_use != i) {
1182                 rx_ring->next_to_use = i;
1183                 ixgbe_release_rx_desc(rx_ring, i);
1184         }
1185 }
1186
1187 static inline u16 ixgbe_get_hlen(union ixgbe_adv_rx_desc *rx_desc)
1188 {
1189         /* HW will not DMA in data larger than the given buffer, even if it
1190          * parses the (NFS, of course) header to be larger.  In that case, it
1191          * fills the header buffer and spills the rest into the page.
1192          */
1193         u16 hdr_info = le16_to_cpu(rx_desc->wb.lower.lo_dword.hs_rss.hdr_info);
1194         u16 hlen = (hdr_info &  IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1195                     IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1196         if (hlen > IXGBE_RX_HDR_SIZE)
1197                 hlen = IXGBE_RX_HDR_SIZE;
1198         return hlen;
1199 }
1200
1201 /**
1202  * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1203  * @skb: pointer to the last skb in the rsc queue
1204  *
1205  * This function changes a queue full of hw rsc buffers into a completed
1206  * packet.  It uses the ->prev pointers to find the first packet and then
1207  * turns it into the frag list owner.
1208  **/
1209 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb)
1210 {
1211         unsigned int frag_list_size = 0;
1212         unsigned int skb_cnt = 1;
1213
1214         while (skb->prev) {
1215                 struct sk_buff *prev = skb->prev;
1216                 frag_list_size += skb->len;
1217                 skb->prev = NULL;
1218                 skb = prev;
1219                 skb_cnt++;
1220         }
1221
1222         skb_shinfo(skb)->frag_list = skb->next;
1223         skb->next = NULL;
1224         skb->len += frag_list_size;
1225         skb->data_len += frag_list_size;
1226         skb->truesize += frag_list_size;
1227         IXGBE_RSC_CB(skb)->skb_cnt = skb_cnt;
1228
1229         return skb;
1230 }
1231
1232 static inline bool ixgbe_get_rsc_state(union ixgbe_adv_rx_desc *rx_desc)
1233 {
1234         return !!(le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1235                 IXGBE_RXDADV_RSCCNT_MASK);
1236 }
1237
1238 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1239                                struct ixgbe_ring *rx_ring,
1240                                int budget)
1241 {
1242         struct ixgbe_adapter *adapter = q_vector->adapter;
1243         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1244         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1245         struct sk_buff *skb;
1246         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1247         const int current_node = numa_node_id();
1248 #ifdef IXGBE_FCOE
1249         int ddp_bytes = 0;
1250 #endif /* IXGBE_FCOE */
1251         u32 staterr;
1252         u16 i;
1253         u16 cleaned_count = 0;
1254         bool pkt_is_rsc = false;
1255
1256         i = rx_ring->next_to_clean;
1257         rx_desc = IXGBE_RX_DESC_ADV(rx_ring, i);
1258         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1259
1260         while (staterr & IXGBE_RXD_STAT_DD) {
1261                 u32 upper_len = 0;
1262
1263                 rmb(); /* read descriptor and rx_buffer_info after status DD */
1264
1265                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1266
1267                 skb = rx_buffer_info->skb;
1268                 rx_buffer_info->skb = NULL;
1269                 prefetch(skb->data);
1270
1271                 if (ring_is_rsc_enabled(rx_ring))
1272                         pkt_is_rsc = ixgbe_get_rsc_state(rx_desc);
1273
1274                 /* linear means we are building an skb from multiple pages */
1275                 if (!skb_is_nonlinear(skb)) {
1276                         u16 hlen;
1277                         if (pkt_is_rsc &&
1278                             !(staterr & IXGBE_RXD_STAT_EOP) &&
1279                             !skb->prev) {
1280                                 /*
1281                                  * When HWRSC is enabled, delay unmapping
1282                                  * of the first packet. It carries the
1283                                  * header information, HW may still
1284                                  * access the header after the writeback.
1285                                  * Only unmap it when EOP is reached
1286                                  */
1287                                 IXGBE_RSC_CB(skb)->delay_unmap = true;
1288                                 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1289                         } else {
1290                                 dma_unmap_single(rx_ring->dev,
1291                                                  rx_buffer_info->dma,
1292                                                  rx_ring->rx_buf_len,
1293                                                  DMA_FROM_DEVICE);
1294                         }
1295                         rx_buffer_info->dma = 0;
1296
1297                         if (ring_is_ps_enabled(rx_ring)) {
1298                                 hlen = ixgbe_get_hlen(rx_desc);
1299                                 upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1300                         } else {
1301                                 hlen = le16_to_cpu(rx_desc->wb.upper.length);
1302                         }
1303
1304                         skb_put(skb, hlen);
1305                 } else {
1306                         /* assume packet split since header is unmapped */
1307                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1308                 }
1309
1310                 if (upper_len) {
1311                         dma_unmap_page(rx_ring->dev,
1312                                        rx_buffer_info->page_dma,
1313                                        PAGE_SIZE / 2,
1314                                        DMA_FROM_DEVICE);
1315                         rx_buffer_info->page_dma = 0;
1316                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1317                                            rx_buffer_info->page,
1318                                            rx_buffer_info->page_offset,
1319                                            upper_len);
1320
1321                         if ((page_count(rx_buffer_info->page) == 1) &&
1322                             (page_to_nid(rx_buffer_info->page) == current_node))
1323                                 get_page(rx_buffer_info->page);
1324                         else
1325                                 rx_buffer_info->page = NULL;
1326
1327                         skb->len += upper_len;
1328                         skb->data_len += upper_len;
1329                         skb->truesize += PAGE_SIZE / 2;
1330                 }
1331
1332                 i++;
1333                 if (i == rx_ring->count)
1334                         i = 0;
1335
1336                 next_rxd = IXGBE_RX_DESC_ADV(rx_ring, i);
1337                 prefetch(next_rxd);
1338                 cleaned_count++;
1339
1340                 if (pkt_is_rsc) {
1341                         u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1342                                      IXGBE_RXDADV_NEXTP_SHIFT;
1343                         next_buffer = &rx_ring->rx_buffer_info[nextp];
1344                 } else {
1345                         next_buffer = &rx_ring->rx_buffer_info[i];
1346                 }
1347
1348                 if (!(staterr & IXGBE_RXD_STAT_EOP)) {
1349                         if (ring_is_ps_enabled(rx_ring)) {
1350                                 rx_buffer_info->skb = next_buffer->skb;
1351                                 rx_buffer_info->dma = next_buffer->dma;
1352                                 next_buffer->skb = skb;
1353                                 next_buffer->dma = 0;
1354                         } else {
1355                                 skb->next = next_buffer->skb;
1356                                 skb->next->prev = skb;
1357                         }
1358                         rx_ring->rx_stats.non_eop_descs++;
1359                         goto next_desc;
1360                 }
1361
1362                 if (skb->prev) {
1363                         skb = ixgbe_transform_rsc_queue(skb);
1364                         /* if we got here without RSC the packet is invalid */
1365                         if (!pkt_is_rsc) {
1366                                 __pskb_trim(skb, 0);
1367                                 rx_buffer_info->skb = skb;
1368                                 goto next_desc;
1369                         }
1370                 }
1371
1372                 if (ring_is_rsc_enabled(rx_ring)) {
1373                         if (IXGBE_RSC_CB(skb)->delay_unmap) {
1374                                 dma_unmap_single(rx_ring->dev,
1375                                                  IXGBE_RSC_CB(skb)->dma,
1376                                                  rx_ring->rx_buf_len,
1377                                                  DMA_FROM_DEVICE);
1378                                 IXGBE_RSC_CB(skb)->dma = 0;
1379                                 IXGBE_RSC_CB(skb)->delay_unmap = false;
1380                         }
1381                 }
1382                 if (pkt_is_rsc) {
1383                         if (ring_is_ps_enabled(rx_ring))
1384                                 rx_ring->rx_stats.rsc_count +=
1385                                         skb_shinfo(skb)->nr_frags;
1386                         else
1387                                 rx_ring->rx_stats.rsc_count +=
1388                                         IXGBE_RSC_CB(skb)->skb_cnt;
1389                         rx_ring->rx_stats.rsc_flush++;
1390                 }
1391
1392                 /* ERR_MASK will only have valid bits if EOP set */
1393                 if (unlikely(staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK)) {
1394                         dev_kfree_skb_any(skb);
1395                         goto next_desc;
1396                 }
1397
1398                 ixgbe_rx_checksum(adapter, rx_desc, skb, staterr);
1399                 if (adapter->netdev->features & NETIF_F_RXHASH)
1400                         ixgbe_rx_hash(rx_desc, skb);
1401
1402                 /* probably a little skewed due to removing CRC */
1403                 total_rx_bytes += skb->len;
1404                 total_rx_packets++;
1405
1406                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
1407 #ifdef IXGBE_FCOE
1408                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1409                 if (ixgbe_rx_is_fcoe(adapter, rx_desc)) {
1410                         ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb,
1411                                                    staterr);
1412                         if (!ddp_bytes) {
1413                                 dev_kfree_skb_any(skb);
1414                                 goto next_desc;
1415                         }
1416                 }
1417 #endif /* IXGBE_FCOE */
1418                 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1419
1420                 budget--;
1421 next_desc:
1422                 rx_desc->wb.upper.status_error = 0;
1423
1424                 if (!budget)
1425                         break;
1426
1427                 /* return some buffers to hardware, one at a time is too slow */
1428                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1429                         ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1430                         cleaned_count = 0;
1431                 }
1432
1433                 /* use prefetched values */
1434                 rx_desc = next_rxd;
1435                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1436         }
1437
1438         rx_ring->next_to_clean = i;
1439         cleaned_count = ixgbe_desc_unused(rx_ring);
1440
1441         if (cleaned_count)
1442                 ixgbe_alloc_rx_buffers(rx_ring, cleaned_count);
1443
1444 #ifdef IXGBE_FCOE
1445         /* include DDPed FCoE data */
1446         if (ddp_bytes > 0) {
1447                 unsigned int mss;
1448
1449                 mss = rx_ring->netdev->mtu - sizeof(struct fcoe_hdr) -
1450                         sizeof(struct fc_frame_header) -
1451                         sizeof(struct fcoe_crc_eof);
1452                 if (mss > 512)
1453                         mss &= ~511;
1454                 total_rx_bytes += ddp_bytes;
1455                 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1456         }
1457 #endif /* IXGBE_FCOE */
1458
1459         u64_stats_update_begin(&rx_ring->syncp);
1460         rx_ring->stats.packets += total_rx_packets;
1461         rx_ring->stats.bytes += total_rx_bytes;
1462         u64_stats_update_end(&rx_ring->syncp);
1463         q_vector->rx.total_packets += total_rx_packets;
1464         q_vector->rx.total_bytes += total_rx_bytes;
1465
1466         return !!budget;
1467 }
1468
1469 /**
1470  * ixgbe_configure_msix - Configure MSI-X hardware
1471  * @adapter: board private structure
1472  *
1473  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1474  * interrupts.
1475  **/
1476 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1477 {
1478         struct ixgbe_q_vector *q_vector;
1479         int q_vectors, v_idx;
1480         u32 mask;
1481
1482         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1483
1484         /* Populate MSIX to EITR Select */
1485         if (adapter->num_vfs > 32) {
1486                 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
1487                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
1488         }
1489
1490         /*
1491          * Populate the IVAR table and set the ITR values to the
1492          * corresponding register.
1493          */
1494         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1495                 struct ixgbe_ring *ring;
1496                 q_vector = adapter->q_vector[v_idx];
1497
1498                 for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
1499                         ixgbe_set_ivar(adapter, 0, ring->reg_idx, v_idx);
1500
1501                 for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
1502                         ixgbe_set_ivar(adapter, 1, ring->reg_idx, v_idx);
1503
1504                 if (q_vector->tx.ring && !q_vector->rx.ring) {
1505                         /* tx only vector */
1506                         if (adapter->tx_itr_setting == 1)
1507                                 q_vector->itr = IXGBE_10K_ITR;
1508                         else
1509                                 q_vector->itr = adapter->tx_itr_setting;
1510                 } else {
1511                         /* rx or rx/tx vector */
1512                         if (adapter->rx_itr_setting == 1)
1513                                 q_vector->itr = IXGBE_20K_ITR;
1514                         else
1515                                 q_vector->itr = adapter->rx_itr_setting;
1516                 }
1517
1518                 ixgbe_write_eitr(q_vector);
1519         }
1520
1521         switch (adapter->hw.mac.type) {
1522         case ixgbe_mac_82598EB:
1523                 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1524                                v_idx);
1525                 break;
1526         case ixgbe_mac_82599EB:
1527         case ixgbe_mac_X540:
1528                 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1529                 break;
1530         default:
1531                 break;
1532         }
1533         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1534
1535         /* set up to autoclear timer, and the vectors */
1536         mask = IXGBE_EIMS_ENABLE_MASK;
1537         mask &= ~(IXGBE_EIMS_OTHER |
1538                   IXGBE_EIMS_MAILBOX |
1539                   IXGBE_EIMS_LSC);
1540
1541         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1542 }
1543
1544 enum latency_range {
1545         lowest_latency = 0,
1546         low_latency = 1,
1547         bulk_latency = 2,
1548         latency_invalid = 255
1549 };
1550
1551 /**
1552  * ixgbe_update_itr - update the dynamic ITR value based on statistics
1553  * @q_vector: structure containing interrupt and ring information
1554  * @ring_container: structure containing ring performance data
1555  *
1556  *      Stores a new ITR value based on packets and byte
1557  *      counts during the last interrupt.  The advantage of per interrupt
1558  *      computation is faster updates and more accurate ITR for the current
1559  *      traffic pattern.  Constants in this function were computed
1560  *      based on theoretical maximum wire speed and thresholds were set based
1561  *      on testing data as well as attempting to minimize response time
1562  *      while increasing bulk throughput.
1563  *      this functionality is controlled by the InterruptThrottleRate module
1564  *      parameter (see ixgbe_param.c)
1565  **/
1566 static void ixgbe_update_itr(struct ixgbe_q_vector *q_vector,
1567                              struct ixgbe_ring_container *ring_container)
1568 {
1569         u64 bytes_perint;
1570         struct ixgbe_adapter *adapter = q_vector->adapter;
1571         int bytes = ring_container->total_bytes;
1572         int packets = ring_container->total_packets;
1573         u32 timepassed_us;
1574         u8 itr_setting = ring_container->itr;
1575
1576         if (packets == 0)
1577                 return;
1578
1579         /* simple throttlerate management
1580          *    0-20MB/s lowest (100000 ints/s)
1581          *   20-100MB/s low   (20000 ints/s)
1582          *  100-1249MB/s bulk (8000 ints/s)
1583          */
1584         /* what was last interrupt timeslice? */
1585         timepassed_us = q_vector->itr >> 2;
1586         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1587
1588         switch (itr_setting) {
1589         case lowest_latency:
1590                 if (bytes_perint > adapter->eitr_low)
1591                         itr_setting = low_latency;
1592                 break;
1593         case low_latency:
1594                 if (bytes_perint > adapter->eitr_high)
1595                         itr_setting = bulk_latency;
1596                 else if (bytes_perint <= adapter->eitr_low)
1597                         itr_setting = lowest_latency;
1598                 break;
1599         case bulk_latency:
1600                 if (bytes_perint <= adapter->eitr_high)
1601                         itr_setting = low_latency;
1602                 break;
1603         }
1604
1605         /* clear work counters since we have the values we need */
1606         ring_container->total_bytes = 0;
1607         ring_container->total_packets = 0;
1608
1609         /* write updated itr to ring container */
1610         ring_container->itr = itr_setting;
1611 }
1612
1613 /**
1614  * ixgbe_write_eitr - write EITR register in hardware specific way
1615  * @q_vector: structure containing interrupt and ring information
1616  *
1617  * This function is made to be called by ethtool and by the driver
1618  * when it needs to update EITR registers at runtime.  Hardware
1619  * specific quirks/differences are taken care of here.
1620  */
1621 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1622 {
1623         struct ixgbe_adapter *adapter = q_vector->adapter;
1624         struct ixgbe_hw *hw = &adapter->hw;
1625         int v_idx = q_vector->v_idx;
1626         u32 itr_reg = q_vector->itr;
1627
1628         switch (adapter->hw.mac.type) {
1629         case ixgbe_mac_82598EB:
1630                 /* must write high and low 16 bits to reset counter */
1631                 itr_reg |= (itr_reg << 16);
1632                 break;
1633         case ixgbe_mac_82599EB:
1634         case ixgbe_mac_X540:
1635                 /*
1636                  * set the WDIS bit to not clear the timer bits and cause an
1637                  * immediate assertion of the interrupt
1638                  */
1639                 itr_reg |= IXGBE_EITR_CNT_WDIS;
1640                 break;
1641         default:
1642                 break;
1643         }
1644         IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1645 }
1646
1647 static void ixgbe_set_itr(struct ixgbe_q_vector *q_vector)
1648 {
1649         u32 new_itr = q_vector->itr;
1650         u8 current_itr;
1651
1652         ixgbe_update_itr(q_vector, &q_vector->tx);
1653         ixgbe_update_itr(q_vector, &q_vector->rx);
1654
1655         current_itr = max(q_vector->rx.itr, q_vector->tx.itr);
1656
1657         switch (current_itr) {
1658         /* counts and packets in update_itr are dependent on these numbers */
1659         case lowest_latency:
1660                 new_itr = IXGBE_100K_ITR;
1661                 break;
1662         case low_latency:
1663                 new_itr = IXGBE_20K_ITR;
1664                 break;
1665         case bulk_latency:
1666                 new_itr = IXGBE_8K_ITR;
1667                 break;
1668         default:
1669                 break;
1670         }
1671
1672         if (new_itr != q_vector->itr) {
1673                 /* do an exponential smoothing */
1674                 new_itr = (10 * new_itr * q_vector->itr) /
1675                           ((9 * new_itr) + q_vector->itr);
1676
1677                 /* save the algorithm value here */
1678                 q_vector->itr = new_itr & IXGBE_MAX_EITR;
1679
1680                 ixgbe_write_eitr(q_vector);
1681         }
1682 }
1683
1684 /**
1685  * ixgbe_check_overtemp_subtask - check for over tempurature
1686  * @adapter: pointer to adapter
1687  **/
1688 static void ixgbe_check_overtemp_subtask(struct ixgbe_adapter *adapter)
1689 {
1690         struct ixgbe_hw *hw = &adapter->hw;
1691         u32 eicr = adapter->interrupt_event;
1692
1693         if (test_bit(__IXGBE_DOWN, &adapter->state))
1694                 return;
1695
1696         if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1697             !(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_EVENT))
1698                 return;
1699
1700         adapter->flags2 &= ~IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1701
1702         switch (hw->device_id) {
1703         case IXGBE_DEV_ID_82599_T3_LOM:
1704                 /*
1705                  * Since the warning interrupt is for both ports
1706                  * we don't have to check if:
1707                  *  - This interrupt wasn't for our port.
1708                  *  - We may have missed the interrupt so always have to
1709                  *    check if we  got a LSC
1710                  */
1711                 if (!(eicr & IXGBE_EICR_GPI_SDP0) &&
1712                     !(eicr & IXGBE_EICR_LSC))
1713                         return;
1714
1715                 if (!(eicr & IXGBE_EICR_LSC) && hw->mac.ops.check_link) {
1716                         u32 autoneg;
1717                         bool link_up = false;
1718
1719                         hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1720
1721                         if (link_up)
1722                                 return;
1723                 }
1724
1725                 /* Check if this is not due to overtemp */
1726                 if (hw->phy.ops.check_overtemp(hw) != IXGBE_ERR_OVERTEMP)
1727                         return;
1728
1729                 break;
1730         default:
1731                 if (!(eicr & IXGBE_EICR_GPI_SDP0))
1732                         return;
1733                 break;
1734         }
1735         e_crit(drv,
1736                "Network adapter has been stopped because it has over heated. "
1737                "Restart the computer. If the problem persists, "
1738                "power off the system and replace the adapter\n");
1739
1740         adapter->interrupt_event = 0;
1741 }
1742
1743 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1744 {
1745         struct ixgbe_hw *hw = &adapter->hw;
1746
1747         if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1748             (eicr & IXGBE_EICR_GPI_SDP1)) {
1749                 e_crit(probe, "Fan has stopped, replace the adapter\n");
1750                 /* write to clear the interrupt */
1751                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1752         }
1753 }
1754
1755 static void ixgbe_check_overtemp_event(struct ixgbe_adapter *adapter, u32 eicr)
1756 {
1757         if (!(adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE))
1758                 return;
1759
1760         switch (adapter->hw.mac.type) {
1761         case ixgbe_mac_82599EB:
1762                 /*
1763                  * Need to check link state so complete overtemp check
1764                  * on service task
1765                  */
1766                 if (((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)) &&
1767                     (!test_bit(__IXGBE_DOWN, &adapter->state))) {
1768                         adapter->interrupt_event = eicr;
1769                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_EVENT;
1770                         ixgbe_service_event_schedule(adapter);
1771                         return;
1772                 }
1773                 return;
1774         case ixgbe_mac_X540:
1775                 if (!(eicr & IXGBE_EICR_TS))
1776                         return;
1777                 break;
1778         default:
1779                 return;
1780         }
1781
1782         e_crit(drv,
1783                "Network adapter has been stopped because it has over heated. "
1784                "Restart the computer. If the problem persists, "
1785                "power off the system and replace the adapter\n");
1786 }
1787
1788 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1789 {
1790         struct ixgbe_hw *hw = &adapter->hw;
1791
1792         if (eicr & IXGBE_EICR_GPI_SDP2) {
1793                 /* Clear the interrupt */
1794                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1795                 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1796                         adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
1797                         ixgbe_service_event_schedule(adapter);
1798                 }
1799         }
1800
1801         if (eicr & IXGBE_EICR_GPI_SDP1) {
1802                 /* Clear the interrupt */
1803                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1804                 if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1805                         adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
1806                         ixgbe_service_event_schedule(adapter);
1807                 }
1808         }
1809 }
1810
1811 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1812 {
1813         struct ixgbe_hw *hw = &adapter->hw;
1814
1815         adapter->lsc_int++;
1816         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1817         adapter->link_check_timeout = jiffies;
1818         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1819                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1820                 IXGBE_WRITE_FLUSH(hw);
1821                 ixgbe_service_event_schedule(adapter);
1822         }
1823 }
1824
1825 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1826                                            u64 qmask)
1827 {
1828         u32 mask;
1829         struct ixgbe_hw *hw = &adapter->hw;
1830
1831         switch (hw->mac.type) {
1832         case ixgbe_mac_82598EB:
1833                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1834                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, mask);
1835                 break;
1836         case ixgbe_mac_82599EB:
1837         case ixgbe_mac_X540:
1838                 mask = (qmask & 0xFFFFFFFF);
1839                 if (mask)
1840                         IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(0), mask);
1841                 mask = (qmask >> 32);
1842                 if (mask)
1843                         IXGBE_WRITE_REG(hw, IXGBE_EIMS_EX(1), mask);
1844                 break;
1845         default:
1846                 break;
1847         }
1848         /* skip the flush */
1849 }
1850
1851 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1852                                             u64 qmask)
1853 {
1854         u32 mask;
1855         struct ixgbe_hw *hw = &adapter->hw;
1856
1857         switch (hw->mac.type) {
1858         case ixgbe_mac_82598EB:
1859                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1860                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, mask);
1861                 break;
1862         case ixgbe_mac_82599EB:
1863         case ixgbe_mac_X540:
1864                 mask = (qmask & 0xFFFFFFFF);
1865                 if (mask)
1866                         IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(0), mask);
1867                 mask = (qmask >> 32);
1868                 if (mask)
1869                         IXGBE_WRITE_REG(hw, IXGBE_EIMC_EX(1), mask);
1870                 break;
1871         default:
1872                 break;
1873         }
1874         /* skip the flush */
1875 }
1876
1877 /**
1878  * ixgbe_irq_enable - Enable default interrupt generation settings
1879  * @adapter: board private structure
1880  **/
1881 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter, bool queues,
1882                                     bool flush)
1883 {
1884         u32 mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
1885
1886         /* don't reenable LSC while waiting for link */
1887         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
1888                 mask &= ~IXGBE_EIMS_LSC;
1889
1890         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
1891                 switch (adapter->hw.mac.type) {
1892                 case ixgbe_mac_82599EB:
1893                         mask |= IXGBE_EIMS_GPI_SDP0;
1894                         break;
1895                 case ixgbe_mac_X540:
1896                         mask |= IXGBE_EIMS_TS;
1897                         break;
1898                 default:
1899                         break;
1900                 }
1901         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
1902                 mask |= IXGBE_EIMS_GPI_SDP1;
1903         switch (adapter->hw.mac.type) {
1904         case ixgbe_mac_82599EB:
1905                 mask |= IXGBE_EIMS_GPI_SDP1;
1906                 mask |= IXGBE_EIMS_GPI_SDP2;
1907         case ixgbe_mac_X540:
1908                 mask |= IXGBE_EIMS_ECC;
1909                 mask |= IXGBE_EIMS_MAILBOX;
1910                 break;
1911         default:
1912                 break;
1913         }
1914         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
1915             !(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
1916                 mask |= IXGBE_EIMS_FLOW_DIR;
1917
1918         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1919         if (queues)
1920                 ixgbe_irq_enable_queues(adapter, ~0);
1921         if (flush)
1922                 IXGBE_WRITE_FLUSH(&adapter->hw);
1923 }
1924
1925 static irqreturn_t ixgbe_msix_other(int irq, void *data)
1926 {
1927         struct ixgbe_adapter *adapter = data;
1928         struct ixgbe_hw *hw = &adapter->hw;
1929         u32 eicr;
1930
1931         /*
1932          * Workaround for Silicon errata.  Use clear-by-write instead
1933          * of clear-by-read.  Reading with EICS will return the
1934          * interrupt causes without clearing, which later be done
1935          * with the write to EICR.
1936          */
1937         eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1938         IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1939
1940         if (eicr & IXGBE_EICR_LSC)
1941                 ixgbe_check_lsc(adapter);
1942
1943         if (eicr & IXGBE_EICR_MAILBOX)
1944                 ixgbe_msg_task(adapter);
1945
1946         switch (hw->mac.type) {
1947         case ixgbe_mac_82599EB:
1948         case ixgbe_mac_X540:
1949                 if (eicr & IXGBE_EICR_ECC)
1950                         e_info(link, "Received unrecoverable ECC Err, please "
1951                                "reboot\n");
1952                 /* Handle Flow Director Full threshold interrupt */
1953                 if (eicr & IXGBE_EICR_FLOW_DIR) {
1954                         int reinit_count = 0;
1955                         int i;
1956                         for (i = 0; i < adapter->num_tx_queues; i++) {
1957                                 struct ixgbe_ring *ring = adapter->tx_ring[i];
1958                                 if (test_and_clear_bit(__IXGBE_TX_FDIR_INIT_DONE,
1959                                                        &ring->state))
1960                                         reinit_count++;
1961                         }
1962                         if (reinit_count) {
1963                                 /* no more flow director interrupts until after init */
1964                                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_FLOW_DIR);
1965                                 adapter->flags2 |= IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
1966                                 ixgbe_service_event_schedule(adapter);
1967                         }
1968                 }
1969                 ixgbe_check_sfp_event(adapter, eicr);
1970                 ixgbe_check_overtemp_event(adapter, eicr);
1971                 break;
1972         default:
1973                 break;
1974         }
1975
1976         ixgbe_check_fan_failure(adapter, eicr);
1977
1978         /* re-enable the original interrupt state, no lsc, no queues */
1979         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1980                 ixgbe_irq_enable(adapter, false, false);
1981
1982         return IRQ_HANDLED;
1983 }
1984
1985 static irqreturn_t ixgbe_msix_clean_rings(int irq, void *data)
1986 {
1987         struct ixgbe_q_vector *q_vector = data;
1988
1989         /* EIAM disabled interrupts (on this vector) for us */
1990
1991         if (q_vector->rx.ring || q_vector->tx.ring)
1992                 napi_schedule(&q_vector->napi);
1993
1994         return IRQ_HANDLED;
1995 }
1996
1997 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
1998                                      int r_idx)
1999 {
2000         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2001         struct ixgbe_ring *rx_ring = a->rx_ring[r_idx];
2002
2003         rx_ring->q_vector = q_vector;
2004         rx_ring->next = q_vector->rx.ring;
2005         q_vector->rx.ring = rx_ring;
2006         q_vector->rx.count++;
2007 }
2008
2009 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2010                                      int t_idx)
2011 {
2012         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2013         struct ixgbe_ring *tx_ring = a->tx_ring[t_idx];
2014
2015         tx_ring->q_vector = q_vector;
2016         tx_ring->next = q_vector->tx.ring;
2017         q_vector->tx.ring = tx_ring;
2018         q_vector->tx.count++;
2019         q_vector->tx.work_limit = a->tx_work_limit;
2020 }
2021
2022 /**
2023  * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2024  * @adapter: board private structure to initialize
2025  *
2026  * This function maps descriptor rings to the queue-specific vectors
2027  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
2028  * one vector per ring/queue, but on a constrained vector budget, we
2029  * group the rings as "efficiently" as possible.  You would add new
2030  * mapping configurations in here.
2031  **/
2032 static void ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter)
2033 {
2034         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2035         int rxr_remaining = adapter->num_rx_queues, rxr_idx = 0;
2036         int txr_remaining = adapter->num_tx_queues, txr_idx = 0;
2037         int v_start = 0;
2038
2039         /* only one q_vector if MSI-X is disabled. */
2040         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2041                 q_vectors = 1;
2042
2043         /*
2044          * If we don't have enough vectors for a 1-to-1 mapping, we'll have to
2045          * group them so there are multiple queues per vector.
2046          *
2047          * Re-adjusting *qpv takes care of the remainder.
2048          */
2049         for (; v_start < q_vectors && rxr_remaining; v_start++) {
2050                 int rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - v_start);
2051                 for (; rqpv; rqpv--, rxr_idx++, rxr_remaining--)
2052                         map_vector_to_rxq(adapter, v_start, rxr_idx);
2053         }
2054
2055         /*
2056          * If there are not enough q_vectors for each ring to have it's own
2057          * vector then we must pair up Rx/Tx on a each vector
2058          */
2059         if ((v_start + txr_remaining) > q_vectors)
2060                 v_start = 0;
2061
2062         for (; v_start < q_vectors && txr_remaining; v_start++) {
2063                 int tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - v_start);
2064                 for (; tqpv; tqpv--, txr_idx++, txr_remaining--)
2065                         map_vector_to_txq(adapter, v_start, txr_idx);
2066         }
2067 }
2068
2069 /**
2070  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2071  * @adapter: board private structure
2072  *
2073  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2074  * interrupts from the kernel.
2075  **/
2076 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2077 {
2078         struct net_device *netdev = adapter->netdev;
2079         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2080         int vector, err;
2081         int ri = 0, ti = 0;
2082
2083         for (vector = 0; vector < q_vectors; vector++) {
2084                 struct ixgbe_q_vector *q_vector = adapter->q_vector[vector];
2085                 struct msix_entry *entry = &adapter->msix_entries[vector];
2086
2087                 if (q_vector->tx.ring && q_vector->rx.ring) {
2088                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2089                                  "%s-%s-%d", netdev->name, "TxRx", ri++);
2090                         ti++;
2091                 } else if (q_vector->rx.ring) {
2092                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2093                                  "%s-%s-%d", netdev->name, "rx", ri++);
2094                 } else if (q_vector->tx.ring) {
2095                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2096                                  "%s-%s-%d", netdev->name, "tx", ti++);
2097                 } else {
2098                         /* skip this unused q_vector */
2099                         continue;
2100                 }
2101                 err = request_irq(entry->vector, &ixgbe_msix_clean_rings, 0,
2102                                   q_vector->name, q_vector);
2103                 if (err) {
2104                         e_err(probe, "request_irq failed for MSIX interrupt "
2105                               "Error: %d\n", err);
2106                         goto free_queue_irqs;
2107                 }
2108                 /* If Flow Director is enabled, set interrupt affinity */
2109                 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
2110                         /* assign the mask for this irq */
2111                         irq_set_affinity_hint(entry->vector,
2112                                               q_vector->affinity_mask);
2113                 }
2114         }
2115
2116         err = request_irq(adapter->msix_entries[vector].vector,
2117                           ixgbe_msix_other, 0, netdev->name, adapter);
2118         if (err) {
2119                 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2120                 goto free_queue_irqs;
2121         }
2122
2123         return 0;
2124
2125 free_queue_irqs:
2126         while (vector) {
2127                 vector--;
2128                 irq_set_affinity_hint(adapter->msix_entries[vector].vector,
2129                                       NULL);
2130                 free_irq(adapter->msix_entries[vector].vector,
2131                          adapter->q_vector[vector]);
2132         }
2133         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2134         pci_disable_msix(adapter->pdev);
2135         kfree(adapter->msix_entries);
2136         adapter->msix_entries = NULL;
2137         return err;
2138 }
2139
2140 /**
2141  * ixgbe_intr - legacy mode Interrupt Handler
2142  * @irq: interrupt number
2143  * @data: pointer to a network interface device structure
2144  **/
2145 static irqreturn_t ixgbe_intr(int irq, void *data)
2146 {
2147         struct ixgbe_adapter *adapter = data;
2148         struct ixgbe_hw *hw = &adapter->hw;
2149         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2150         u32 eicr;
2151
2152         /*
2153          * Workaround for silicon errata on 82598.  Mask the interrupts
2154          * before the read of EICR.
2155          */
2156         IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2157
2158         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2159          * therefore no explict interrupt disable is necessary */
2160         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2161         if (!eicr) {
2162                 /*
2163                  * shared interrupt alert!
2164                  * make sure interrupts are enabled because the read will
2165                  * have disabled interrupts due to EIAM
2166                  * finish the workaround of silicon errata on 82598.  Unmask
2167                  * the interrupt that we masked before the EICR read.
2168                  */
2169                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2170                         ixgbe_irq_enable(adapter, true, true);
2171                 return IRQ_NONE;        /* Not our interrupt */
2172         }
2173
2174         if (eicr & IXGBE_EICR_LSC)
2175                 ixgbe_check_lsc(adapter);
2176
2177         switch (hw->mac.type) {
2178         case ixgbe_mac_82599EB:
2179                 ixgbe_check_sfp_event(adapter, eicr);
2180                 /* Fall through */
2181         case ixgbe_mac_X540:
2182                 if (eicr & IXGBE_EICR_ECC)
2183                         e_info(link, "Received unrecoverable ECC err, please "
2184                                      "reboot\n");
2185                 ixgbe_check_overtemp_event(adapter, eicr);
2186                 break;
2187         default:
2188                 break;
2189         }
2190
2191         ixgbe_check_fan_failure(adapter, eicr);
2192
2193         if (napi_schedule_prep(&(q_vector->napi))) {
2194                 /* would disable interrupts here but EIAM disabled it */
2195                 __napi_schedule(&(q_vector->napi));
2196         }
2197
2198         /*
2199          * re-enable link(maybe) and non-queue interrupts, no flush.
2200          * ixgbe_poll will re-enable the queue interrupts
2201          */
2202
2203         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2204                 ixgbe_irq_enable(adapter, false, false);
2205
2206         return IRQ_HANDLED;
2207 }
2208
2209 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2210 {
2211         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2212         int i;
2213
2214         /* legacy and MSI only use one vector */
2215         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2216                 q_vectors = 1;
2217
2218         for (i = 0; i < adapter->num_rx_queues; i++) {
2219                 adapter->rx_ring[i]->q_vector = NULL;
2220                 adapter->rx_ring[i]->next = NULL;
2221         }
2222         for (i = 0; i < adapter->num_tx_queues; i++) {
2223                 adapter->tx_ring[i]->q_vector = NULL;
2224                 adapter->tx_ring[i]->next = NULL;
2225         }
2226
2227         for (i = 0; i < q_vectors; i++) {
2228                 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2229                 memset(&q_vector->rx, 0, sizeof(struct ixgbe_ring_container));
2230                 memset(&q_vector->tx, 0, sizeof(struct ixgbe_ring_container));
2231         }
2232 }
2233
2234 /**
2235  * ixgbe_request_irq - initialize interrupts
2236  * @adapter: board private structure
2237  *
2238  * Attempts to configure interrupts using the best available
2239  * capabilities of the hardware and kernel.
2240  **/
2241 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2242 {
2243         struct net_device *netdev = adapter->netdev;
2244         int err;
2245
2246         /* map all of the rings to the q_vectors */
2247         ixgbe_map_rings_to_vectors(adapter);
2248
2249         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2250                 err = ixgbe_request_msix_irqs(adapter);
2251         else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED)
2252                 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2253                                   netdev->name, adapter);
2254         else
2255                 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2256                                   netdev->name, adapter);
2257
2258         if (err) {
2259                 e_err(probe, "request_irq failed, Error %d\n", err);
2260
2261                 /* place q_vectors and rings back into a known good state */
2262                 ixgbe_reset_q_vectors(adapter);
2263         }
2264
2265         return err;
2266 }
2267
2268 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2269 {
2270         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2271                 int i, q_vectors;
2272
2273                 q_vectors = adapter->num_msix_vectors;
2274                 i = q_vectors - 1;
2275                 free_irq(adapter->msix_entries[i].vector, adapter);
2276                 i--;
2277
2278                 for (; i >= 0; i--) {
2279                         /* free only the irqs that were actually requested */
2280                         if (!adapter->q_vector[i]->rx.ring &&
2281                             !adapter->q_vector[i]->tx.ring)
2282                                 continue;
2283
2284                         /* clear the affinity_mask in the IRQ descriptor */
2285                         irq_set_affinity_hint(adapter->msix_entries[i].vector,
2286                                               NULL);
2287
2288                         free_irq(adapter->msix_entries[i].vector,
2289                                  adapter->q_vector[i]);
2290                 }
2291         } else {
2292                 free_irq(adapter->pdev->irq, adapter);
2293         }
2294
2295         /* clear q_vector state information */
2296         ixgbe_reset_q_vectors(adapter);
2297 }
2298
2299 /**
2300  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2301  * @adapter: board private structure
2302  **/
2303 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2304 {
2305         switch (adapter->hw.mac.type) {
2306         case ixgbe_mac_82598EB:
2307                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2308                 break;
2309         case ixgbe_mac_82599EB:
2310         case ixgbe_mac_X540:
2311                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2312                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2313                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2314                 break;
2315         default:
2316                 break;
2317         }
2318         IXGBE_WRITE_FLUSH(&adapter->hw);
2319         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2320                 int i;
2321                 for (i = 0; i < adapter->num_msix_vectors; i++)
2322                         synchronize_irq(adapter->msix_entries[i].vector);
2323         } else {
2324                 synchronize_irq(adapter->pdev->irq);
2325         }
2326 }
2327
2328 /**
2329  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2330  *
2331  **/
2332 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2333 {
2334         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2335
2336         /* rx/tx vector */
2337         if (adapter->rx_itr_setting == 1)
2338                 q_vector->itr = IXGBE_20K_ITR;
2339         else
2340                 q_vector->itr = adapter->rx_itr_setting;
2341
2342         ixgbe_write_eitr(q_vector);
2343
2344         ixgbe_set_ivar(adapter, 0, 0, 0);
2345         ixgbe_set_ivar(adapter, 1, 0, 0);
2346
2347         e_info(hw, "Legacy interrupt IVAR setup done\n");
2348 }
2349
2350 /**
2351  * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2352  * @adapter: board private structure
2353  * @ring: structure containing ring specific data
2354  *
2355  * Configure the Tx descriptor ring after a reset.
2356  **/
2357 void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2358                              struct ixgbe_ring *ring)
2359 {
2360         struct ixgbe_hw *hw = &adapter->hw;
2361         u64 tdba = ring->dma;
2362         int wait_loop = 10;
2363         u32 txdctl = IXGBE_TXDCTL_ENABLE;
2364         u8 reg_idx = ring->reg_idx;
2365
2366         /* disable queue to avoid issues while updating state */
2367         IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), 0);
2368         IXGBE_WRITE_FLUSH(hw);
2369
2370         IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2371                         (tdba & DMA_BIT_MASK(32)));
2372         IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2373         IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2374                         ring->count * sizeof(union ixgbe_adv_tx_desc));
2375         IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2376         IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2377         ring->tail = hw->hw_addr + IXGBE_TDT(reg_idx);
2378
2379         /*
2380          * set WTHRESH to encourage burst writeback, it should not be set
2381          * higher than 1 when ITR is 0 as it could cause false TX hangs
2382          *
2383          * In order to avoid issues WTHRESH + PTHRESH should always be equal
2384          * to or less than the number of on chip descriptors, which is
2385          * currently 40.
2386          */
2387         if (!adapter->tx_itr_setting || !adapter->rx_itr_setting)
2388                 txdctl |= (1 << 16);    /* WTHRESH = 1 */
2389         else
2390                 txdctl |= (8 << 16);    /* WTHRESH = 8 */
2391
2392         /* PTHRESH=32 is needed to avoid a Tx hang with DFP enabled. */
2393         txdctl |= (1 << 8) |    /* HTHRESH = 1 */
2394                    32;          /* PTHRESH = 32 */
2395
2396         /* reinitialize flowdirector state */
2397         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) &&
2398             adapter->atr_sample_rate) {
2399                 ring->atr_sample_rate = adapter->atr_sample_rate;
2400                 ring->atr_count = 0;
2401                 set_bit(__IXGBE_TX_FDIR_INIT_DONE, &ring->state);
2402         } else {
2403                 ring->atr_sample_rate = 0;
2404         }
2405
2406         clear_bit(__IXGBE_HANG_CHECK_ARMED, &ring->state);
2407
2408         /* enable queue */
2409         IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), txdctl);
2410
2411         /* TXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2412         if (hw->mac.type == ixgbe_mac_82598EB &&
2413             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2414                 return;
2415
2416         /* poll to verify queue is enabled */
2417         do {
2418                 usleep_range(1000, 2000);
2419                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(reg_idx));
2420         } while (--wait_loop && !(txdctl & IXGBE_TXDCTL_ENABLE));
2421         if (!wait_loop)
2422                 e_err(drv, "Could not enable Tx Queue %d\n", reg_idx);
2423 }
2424
2425 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2426 {
2427         struct ixgbe_hw *hw = &adapter->hw;
2428         u32 rttdcs;
2429         u32 reg;
2430         u8 tcs = netdev_get_num_tc(adapter->netdev);
2431
2432         if (hw->mac.type == ixgbe_mac_82598EB)
2433                 return;
2434
2435         /* disable the arbiter while setting MTQC */
2436         rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2437         rttdcs |= IXGBE_RTTDCS_ARBDIS;
2438         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2439
2440         /* set transmit pool layout */
2441         switch (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2442         case (IXGBE_FLAG_SRIOV_ENABLED):
2443                 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2444                                 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2445                 break;
2446         default:
2447                 if (!tcs)
2448                         reg = IXGBE_MTQC_64Q_1PB;
2449                 else if (tcs <= 4)
2450                         reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_4TC_4TQ;
2451                 else
2452                         reg = IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ;
2453
2454                 IXGBE_WRITE_REG(hw, IXGBE_MTQC, reg);
2455
2456                 /* Enable Security TX Buffer IFG for multiple pb */
2457                 if (tcs) {
2458                         reg = IXGBE_READ_REG(hw, IXGBE_SECTXMINIFG);
2459                         reg |= IXGBE_SECTX_DCB;
2460                         IXGBE_WRITE_REG(hw, IXGBE_SECTXMINIFG, reg);
2461                 }
2462                 break;
2463         }
2464
2465         /* re-enable the arbiter */
2466         rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2467         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2468 }
2469
2470 /**
2471  * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2472  * @adapter: board private structure
2473  *
2474  * Configure the Tx unit of the MAC after a reset.
2475  **/
2476 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2477 {
2478         struct ixgbe_hw *hw = &adapter->hw;
2479         u32 dmatxctl;
2480         u32 i;
2481
2482         ixgbe_setup_mtqc(adapter);
2483
2484         if (hw->mac.type != ixgbe_mac_82598EB) {
2485                 /* DMATXCTL.EN must be before Tx queues are enabled */
2486                 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
2487                 dmatxctl |= IXGBE_DMATXCTL_TE;
2488                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
2489         }
2490
2491         /* Setup the HW Tx Head and Tail descriptor pointers */
2492         for (i = 0; i < adapter->num_tx_queues; i++)
2493                 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2494 }
2495
2496 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2497
2498 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2499                                    struct ixgbe_ring *rx_ring)
2500 {
2501         u32 srrctl;
2502         u8 reg_idx = rx_ring->reg_idx;
2503
2504         switch (adapter->hw.mac.type) {
2505         case ixgbe_mac_82598EB: {
2506                 struct ixgbe_ring_feature *feature = adapter->ring_feature;
2507                 const int mask = feature[RING_F_RSS].mask;
2508                 reg_idx = reg_idx & mask;
2509         }
2510                 break;
2511         case ixgbe_mac_82599EB:
2512         case ixgbe_mac_X540:
2513         default:
2514                 break;
2515         }
2516
2517         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx));
2518
2519         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2520         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2521         if (adapter->num_vfs)
2522                 srrctl |= IXGBE_SRRCTL_DROP_EN;
2523
2524         srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2525                   IXGBE_SRRCTL_BSIZEHDR_MASK;
2526
2527         if (ring_is_ps_enabled(rx_ring)) {
2528 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2529                 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2530 #else
2531                 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2532 #endif
2533                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2534         } else {
2535                 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2536                           IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2537                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2538         }
2539
2540         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(reg_idx), srrctl);
2541 }
2542
2543 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2544 {
2545         struct ixgbe_hw *hw = &adapter->hw;
2546         static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2547                           0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2548                           0x6A3E67EA, 0x14364D17, 0x3BED200D};
2549         u32 mrqc = 0, reta = 0;
2550         u32 rxcsum;
2551         int i, j;
2552         u8 tcs = netdev_get_num_tc(adapter->netdev);
2553         int maxq = adapter->ring_feature[RING_F_RSS].indices;
2554
2555         if (tcs)
2556                 maxq = min(maxq, adapter->num_tx_queues / tcs);
2557
2558         /* Fill out hash function seeds */
2559         for (i = 0; i < 10; i++)
2560                 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2561
2562         /* Fill out redirection table */
2563         for (i = 0, j = 0; i < 128; i++, j++) {
2564                 if (j == maxq)
2565                         j = 0;
2566                 /* reta = 4-byte sliding window of
2567                  * 0x00..(indices-1)(indices-1)00..etc. */
2568                 reta = (reta << 8) | (j * 0x11);
2569                 if ((i & 3) == 3)
2570                         IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2571         }
2572
2573         /* Disable indicating checksum in descriptor, enables RSS hash */
2574         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2575         rxcsum |= IXGBE_RXCSUM_PCSD;
2576         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2577
2578         if (adapter->hw.mac.type == ixgbe_mac_82598EB &&
2579             (adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
2580                 mrqc = IXGBE_MRQC_RSSEN;
2581         } else {
2582                 int mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2583                                              | IXGBE_FLAG_SRIOV_ENABLED);
2584
2585                 switch (mask) {
2586                 case (IXGBE_FLAG_RSS_ENABLED):
2587                         if (!tcs)
2588                                 mrqc = IXGBE_MRQC_RSSEN;
2589                         else if (tcs <= 4)
2590                                 mrqc = IXGBE_MRQC_RTRSS4TCEN;
2591                         else
2592                                 mrqc = IXGBE_MRQC_RTRSS8TCEN;
2593                         break;
2594                 case (IXGBE_FLAG_SRIOV_ENABLED):
2595                         mrqc = IXGBE_MRQC_VMDQEN;
2596                         break;
2597                 default:
2598                         break;
2599                 }
2600         }
2601
2602         /* Perform hash on these packet types */
2603         mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2604               | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2605               | IXGBE_MRQC_RSS_FIELD_IPV6
2606               | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2607
2608         IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2609 }
2610
2611 /**
2612  * ixgbe_configure_rscctl - enable RSC for the indicated ring
2613  * @adapter:    address of board private structure
2614  * @index:      index of ring to set
2615  **/
2616 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter,
2617                                    struct ixgbe_ring *ring)
2618 {
2619         struct ixgbe_hw *hw = &adapter->hw;
2620         u32 rscctrl;
2621         int rx_buf_len;
2622         u8 reg_idx = ring->reg_idx;
2623
2624         if (!ring_is_rsc_enabled(ring))
2625                 return;
2626
2627         rx_buf_len = ring->rx_buf_len;
2628         rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(reg_idx));
2629         rscctrl |= IXGBE_RSCCTL_RSCEN;
2630         /*
2631          * we must limit the number of descriptors so that the
2632          * total size of max desc * buf_len is not greater
2633          * than 65535
2634          */
2635         if (ring_is_ps_enabled(ring)) {
2636 #if (MAX_SKB_FRAGS > 16)
2637                 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2638 #elif (MAX_SKB_FRAGS > 8)
2639                 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2640 #elif (MAX_SKB_FRAGS > 4)
2641                 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2642 #else
2643                 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2644 #endif
2645         } else {
2646                 if (rx_buf_len < IXGBE_RXBUFFER_4K)
2647                         rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2648                 else if (rx_buf_len < IXGBE_RXBUFFER_8K)
2649                         rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2650                 else
2651                         rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2652         }
2653         IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(reg_idx), rscctrl);
2654 }
2655
2656 /**
2657  *  ixgbe_set_uta - Set unicast filter table address
2658  *  @adapter: board private structure
2659  *
2660  *  The unicast table address is a register array of 32-bit registers.
2661  *  The table is meant to be used in a way similar to how the MTA is used
2662  *  however due to certain limitations in the hardware it is necessary to
2663  *  set all the hash bits to 1 and use the VMOLR ROPE bit as a promiscuous
2664  *  enable bit to allow vlan tag stripping when promiscuous mode is enabled
2665  **/
2666 static void ixgbe_set_uta(struct ixgbe_adapter *adapter)
2667 {
2668         struct ixgbe_hw *hw = &adapter->hw;
2669         int i;
2670
2671         /* The UTA table only exists on 82599 hardware and newer */
2672         if (hw->mac.type < ixgbe_mac_82599EB)
2673                 return;
2674
2675         /* we only need to do this if VMDq is enabled */
2676         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2677                 return;
2678
2679         for (i = 0; i < 128; i++)
2680                 IXGBE_WRITE_REG(hw, IXGBE_UTA(i), ~0);
2681 }
2682
2683 #define IXGBE_MAX_RX_DESC_POLL 10
2684 static void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
2685                                        struct ixgbe_ring *ring)
2686 {
2687         struct ixgbe_hw *hw = &adapter->hw;
2688         int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2689         u32 rxdctl;
2690         u8 reg_idx = ring->reg_idx;
2691
2692         /* RXDCTL.EN will return 0 on 82598 if link is down, so skip it */
2693         if (hw->mac.type == ixgbe_mac_82598EB &&
2694             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2695                 return;
2696
2697         do {
2698                 usleep_range(1000, 2000);
2699                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2700         } while (--wait_loop && !(rxdctl & IXGBE_RXDCTL_ENABLE));
2701
2702         if (!wait_loop) {
2703                 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
2704                       "the polling period\n", reg_idx);
2705         }
2706 }
2707
2708 void ixgbe_disable_rx_queue(struct ixgbe_adapter *adapter,
2709                             struct ixgbe_ring *ring)
2710 {
2711         struct ixgbe_hw *hw = &adapter->hw;
2712         int wait_loop = IXGBE_MAX_RX_DESC_POLL;
2713         u32 rxdctl;
2714         u8 reg_idx = ring->reg_idx;
2715
2716         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2717         rxdctl &= ~IXGBE_RXDCTL_ENABLE;
2718
2719         /* write value back with RXDCTL.ENABLE bit cleared */
2720         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2721
2722         if (hw->mac.type == ixgbe_mac_82598EB &&
2723             !(IXGBE_READ_REG(hw, IXGBE_LINKS) & IXGBE_LINKS_UP))
2724                 return;
2725
2726         /* the hardware may take up to 100us to really disable the rx queue */
2727         do {
2728                 udelay(10);
2729                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2730         } while (--wait_loop && (rxdctl & IXGBE_RXDCTL_ENABLE));
2731
2732         if (!wait_loop) {
2733                 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not cleared within "
2734                       "the polling period\n", reg_idx);
2735         }
2736 }
2737
2738 void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2739                              struct ixgbe_ring *ring)
2740 {
2741         struct ixgbe_hw *hw = &adapter->hw;
2742         u64 rdba = ring->dma;
2743         u32 rxdctl;
2744         u8 reg_idx = ring->reg_idx;
2745
2746         /* disable queue to avoid issues while updating state */
2747         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(reg_idx));
2748         ixgbe_disable_rx_queue(adapter, ring);
2749
2750         IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2751         IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2752         IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2753                         ring->count * sizeof(union ixgbe_adv_rx_desc));
2754         IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2755         IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2756         ring->tail = hw->hw_addr + IXGBE_RDT(reg_idx);
2757
2758         ixgbe_configure_srrctl(adapter, ring);
2759         ixgbe_configure_rscctl(adapter, ring);
2760
2761         /* If operating in IOV mode set RLPML for X540 */
2762         if ((adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) &&
2763             hw->mac.type == ixgbe_mac_X540) {
2764                 rxdctl &= ~IXGBE_RXDCTL_RLPMLMASK;
2765                 rxdctl |= ((ring->netdev->mtu + ETH_HLEN +
2766                             ETH_FCS_LEN + VLAN_HLEN) | IXGBE_RXDCTL_RLPML_EN);
2767         }
2768
2769         if (hw->mac.type == ixgbe_mac_82598EB) {
2770                 /*
2771                  * enable cache line friendly hardware writes:
2772                  * PTHRESH=32 descriptors (half the internal cache),
2773                  * this also removes ugly rx_no_buffer_count increment
2774                  * HTHRESH=4 descriptors (to minimize latency on fetch)
2775                  * WTHRESH=8 burst writeback up to two cache lines
2776                  */
2777                 rxdctl &= ~0x3FFFFF;
2778                 rxdctl |=  0x080420;
2779         }
2780
2781         /* enable receive descriptor ring */
2782         rxdctl |= IXGBE_RXDCTL_ENABLE;
2783         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(reg_idx), rxdctl);
2784
2785         ixgbe_rx_desc_queue_enable(adapter, ring);
2786         ixgbe_alloc_rx_buffers(ring, ixgbe_desc_unused(ring));
2787 }
2788
2789 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2790 {
2791         struct ixgbe_hw *hw = &adapter->hw;
2792         int p;
2793
2794         /* PSRTYPE must be initialized in non 82598 adapters */
2795         u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2796                       IXGBE_PSRTYPE_UDPHDR |
2797                       IXGBE_PSRTYPE_IPV4HDR |
2798                       IXGBE_PSRTYPE_L2HDR |
2799                       IXGBE_PSRTYPE_IPV6HDR;
2800
2801         if (hw->mac.type == ixgbe_mac_82598EB)
2802                 return;
2803
2804         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2805                 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2806
2807         for (p = 0; p < adapter->num_rx_pools; p++)
2808                 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2809                                 psrtype);
2810 }
2811
2812 static void ixgbe_configure_virtualization(struct ixgbe_adapter *adapter)
2813 {
2814         struct ixgbe_hw *hw = &adapter->hw;
2815         u32 gcr_ext;
2816         u32 vt_reg_bits;
2817         u32 reg_offset, vf_shift;
2818         u32 vmdctl;
2819         int i;
2820
2821         if (!(adapter->flags & IXGBE_FLAG_SRIOV_ENABLED))
2822                 return;
2823
2824         vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2825         vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN | IXGBE_VT_CTL_REPLEN;
2826         vt_reg_bits |= (adapter->num_vfs << IXGBE_VT_CTL_POOL_SHIFT);
2827         IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2828
2829         vf_shift = adapter->num_vfs % 32;
2830         reg_offset = (adapter->num_vfs > 32) ? 1 : 0;
2831
2832         /* Enable only the PF's pool for Tx/Rx */
2833         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2834         IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset ^ 1), 0);
2835         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2836         IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset ^ 1), 0);
2837         IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2838
2839         /* Map PF MAC address in RAR Entry 0 to first pool following VFs */
2840         hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2841
2842         /*
2843          * Set up VF register offsets for selected VT Mode,
2844          * i.e. 32 or 64 VFs for SR-IOV
2845          */
2846         gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2847         gcr_ext |= IXGBE_GCR_EXT_MSIX_EN;
2848         gcr_ext |= IXGBE_GCR_EXT_VT_MODE_64;
2849         IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2850
2851         /* enable Tx loopback for VF/PF communication */
2852         IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2853         /* Enable MAC Anti-Spoofing */
2854         hw->mac.ops.set_mac_anti_spoofing(hw,
2855                                            (adapter->num_vfs != 0),
2856                                           adapter->num_vfs);
2857         /* For VFs that have spoof checking turned off */
2858         for (i = 0; i < adapter->num_vfs; i++) {
2859                 if (!adapter->vfinfo[i].spoofchk_enabled)
2860                         ixgbe_ndo_set_vf_spoofchk(adapter->netdev, i, false);
2861         }
2862 }
2863
2864 static void ixgbe_set_rx_buffer_len(struct ixgbe_adapter *adapter)
2865 {
2866         struct ixgbe_hw *hw = &adapter->hw;
2867         struct net_device *netdev = adapter->netdev;
2868         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2869         int rx_buf_len;
2870         struct ixgbe_ring *rx_ring;
2871         int i;
2872         u32 mhadd, hlreg0;
2873
2874         /* Decide whether to use packet split mode or not */
2875         /* On by default */
2876         adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2877
2878         /* Do not use packet split if we're in SR-IOV Mode */
2879         if (adapter->num_vfs)
2880                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
2881
2882         /* Disable packet split due to 82599 erratum #45 */
2883         if (hw->mac.type == ixgbe_mac_82599EB)
2884                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
2885
2886 #ifdef IXGBE_FCOE
2887         /* adjust max frame to be able to do baby jumbo for FCoE */
2888         if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED) &&
2889             (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
2890                 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
2891
2892 #endif /* IXGBE_FCOE */
2893         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
2894         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
2895                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
2896                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
2897
2898                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
2899         }
2900
2901         /* MHADD will allow an extra 4 bytes past for vlan tagged frames */
2902         max_frame += VLAN_HLEN;
2903
2904         /* Set the RX buffer length according to the mode */
2905         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2906                 rx_buf_len = IXGBE_RX_HDR_SIZE;
2907         } else {
2908                 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2909                     (netdev->mtu <= ETH_DATA_LEN))
2910                         rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2911                 /*
2912                  * Make best use of allocation by using all but 1K of a
2913                  * power of 2 allocation that will be used for skb->head.
2914                  */
2915                 else if (max_frame <= IXGBE_RXBUFFER_3K)
2916                         rx_buf_len = IXGBE_RXBUFFER_3K;
2917                 else if (max_frame <= IXGBE_RXBUFFER_7K)
2918                         rx_buf_len = IXGBE_RXBUFFER_7K;
2919                 else if (max_frame <= IXGBE_RXBUFFER_15K)
2920                         rx_buf_len = IXGBE_RXBUFFER_15K;
2921                 else
2922                         rx_buf_len = IXGBE_MAX_RXBUFFER;
2923         }
2924
2925         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2926         /* set jumbo enable since MHADD.MFS is keeping size locked at max_frame */
2927         hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2928         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2929
2930         /*
2931          * Setup the HW Rx Head and Tail Descriptor Pointers and
2932          * the Base and Length of the Rx Descriptor Ring
2933          */
2934         for (i = 0; i < adapter->num_rx_queues; i++) {
2935                 rx_ring = adapter->rx_ring[i];
2936                 rx_ring->rx_buf_len = rx_buf_len;
2937
2938                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2939                         set_ring_ps_enabled(rx_ring);
2940                 else
2941                         clear_ring_ps_enabled(rx_ring);
2942
2943                 if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
2944                         set_ring_rsc_enabled(rx_ring);
2945                 else
2946                         clear_ring_rsc_enabled(rx_ring);
2947
2948 #ifdef IXGBE_FCOE
2949                 if (netdev->features & NETIF_F_FCOE_MTU) {
2950                         struct ixgbe_ring_feature *f;
2951                         f = &adapter->ring_feature[RING_F_FCOE];
2952                         if ((i >= f->mask) && (i < f->mask + f->indices)) {
2953                                 clear_ring_ps_enabled(rx_ring);
2954                                 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2955                                         rx_ring->rx_buf_len =
2956                                                 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2957                         } else if (!ring_is_rsc_enabled(rx_ring) &&
2958                                    !ring_is_ps_enabled(rx_ring)) {
2959                                 rx_ring->rx_buf_len =
2960                                                 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2961                         }
2962                 }
2963 #endif /* IXGBE_FCOE */
2964         }
2965 }
2966
2967 static void ixgbe_setup_rdrxctl(struct ixgbe_adapter *adapter)
2968 {
2969         struct ixgbe_hw *hw = &adapter->hw;
2970         u32 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2971
2972         switch (hw->mac.type) {
2973         case ixgbe_mac_82598EB:
2974                 /*
2975                  * For VMDq support of different descriptor types or
2976                  * buffer sizes through the use of multiple SRRCTL
2977                  * registers, RDRXCTL.MVMEN must be set to 1
2978                  *
2979                  * also, the manual doesn't mention it clearly but DCA hints
2980                  * will only use queue 0's tags unless this bit is set.  Side
2981                  * effects of setting this bit are only that SRRCTL must be
2982                  * fully programmed [0..15]
2983                  */
2984                 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2985                 break;
2986         case ixgbe_mac_82599EB:
2987         case ixgbe_mac_X540:
2988                 /* Disable RSC for ACK packets */
2989                 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2990                    (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2991                 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2992                 /* hardware requires some bits to be set by default */
2993                 rdrxctl |= (IXGBE_RDRXCTL_RSCACKC | IXGBE_RDRXCTL_FCOE_WRFIX);
2994                 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2995                 break;
2996         default:
2997                 /* We should do nothing since we don't know this hardware */
2998                 return;
2999         }
3000
3001         IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
3002 }
3003
3004 /**
3005  * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
3006  * @adapter: board private structure
3007  *
3008  * Configure the Rx unit of the MAC after a reset.
3009  **/
3010 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
3011 {
3012         struct ixgbe_hw *hw = &adapter->hw;
3013         int i;
3014         u32 rxctrl;
3015
3016         /* disable receives while setting up the descriptors */
3017         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3018         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3019
3020         ixgbe_setup_psrtype(adapter);
3021         ixgbe_setup_rdrxctl(adapter);
3022
3023         /* Program registers for the distribution of queues */
3024         ixgbe_setup_mrqc(adapter);
3025
3026         ixgbe_set_uta(adapter);
3027
3028         /* set_rx_buffer_len must be called before ring initialization */
3029         ixgbe_set_rx_buffer_len(adapter);
3030
3031         /*
3032          * Setup the HW Rx Head and Tail Descriptor Pointers and
3033          * the Base and Length of the Rx Descriptor Ring
3034          */
3035         for (i = 0; i < adapter->num_rx_queues; i++)
3036                 ixgbe_configure_rx_ring(adapter, adapter->rx_ring[i]);
3037
3038         /* disable drop enable for 82598 parts */
3039         if (hw->mac.type == ixgbe_mac_82598EB)
3040                 rxctrl |= IXGBE_RXCTRL_DMBYPS;
3041
3042         /* enable all receives */
3043         rxctrl |= IXGBE_RXCTRL_RXEN;
3044         hw->mac.ops.enable_rx_dma(hw, rxctrl);
3045 }
3046
3047 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
3048 {
3049         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3050         struct ixgbe_hw *hw = &adapter->hw;
3051         int pool_ndx = adapter->num_vfs;
3052
3053         /* add VID to filter table */
3054         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
3055         set_bit(vid, adapter->active_vlans);
3056 }
3057
3058 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
3059 {
3060         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3061         struct ixgbe_hw *hw = &adapter->hw;
3062         int pool_ndx = adapter->num_vfs;
3063
3064         /* remove VID from filter table */
3065         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
3066         clear_bit(vid, adapter->active_vlans);
3067 }
3068
3069 /**
3070  * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
3071  * @adapter: driver data
3072  */
3073 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
3074 {
3075         struct ixgbe_hw *hw = &adapter->hw;
3076         u32 vlnctrl;
3077
3078         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3079         vlnctrl &= ~(IXGBE_VLNCTRL_VFE | IXGBE_VLNCTRL_CFIEN);
3080         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3081 }
3082
3083 /**
3084  * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
3085  * @adapter: driver data
3086  */
3087 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
3088 {
3089         struct ixgbe_hw *hw = &adapter->hw;
3090         u32 vlnctrl;
3091
3092         vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3093         vlnctrl |= IXGBE_VLNCTRL_VFE;
3094         vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
3095         IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3096 }
3097
3098 /**
3099  * ixgbe_vlan_strip_disable - helper to disable hw vlan stripping
3100  * @adapter: driver data
3101  */
3102 static void ixgbe_vlan_strip_disable(struct ixgbe_adapter *adapter)
3103 {
3104         struct ixgbe_hw *hw = &adapter->hw;
3105         u32 vlnctrl;
3106         int i, j;
3107
3108         switch (hw->mac.type) {
3109         case ixgbe_mac_82598EB:
3110                 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3111                 vlnctrl &= ~IXGBE_VLNCTRL_VME;
3112                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3113                 break;
3114         case ixgbe_mac_82599EB:
3115         case ixgbe_mac_X540:
3116                 for (i = 0; i < adapter->num_rx_queues; i++) {
3117                         j = adapter->rx_ring[i]->reg_idx;
3118                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3119                         vlnctrl &= ~IXGBE_RXDCTL_VME;
3120                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3121                 }
3122                 break;
3123         default:
3124                 break;
3125         }
3126 }
3127
3128 /**
3129  * ixgbe_vlan_strip_enable - helper to enable hw vlan stripping
3130  * @adapter: driver data
3131  */
3132 static void ixgbe_vlan_strip_enable(struct ixgbe_adapter *adapter)
3133 {
3134         struct ixgbe_hw *hw = &adapter->hw;
3135         u32 vlnctrl;
3136         int i, j;
3137
3138         switch (hw->mac.type) {
3139         case ixgbe_mac_82598EB:
3140                 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
3141                 vlnctrl |= IXGBE_VLNCTRL_VME;
3142                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
3143                 break;
3144         case ixgbe_mac_82599EB:
3145         case ixgbe_mac_X540:
3146                 for (i = 0; i < adapter->num_rx_queues; i++) {
3147                         j = adapter->rx_ring[i]->reg_idx;
3148                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3149                         vlnctrl |= IXGBE_RXDCTL_VME;
3150                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
3151                 }
3152                 break;
3153         default:
3154                 break;
3155         }
3156 }
3157
3158 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
3159 {
3160         u16 vid;
3161
3162         ixgbe_vlan_rx_add_vid(adapter->netdev, 0);
3163
3164         for_each_set_bit(vid, adapter->active_vlans, VLAN_N_VID)
3165                 ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
3166 }
3167
3168 /**
3169  * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
3170  * @netdev: network interface device structure
3171  *
3172  * Writes unicast address list to the RAR table.
3173  * Returns: -ENOMEM on failure/insufficient address space
3174  *                0 on no addresses written
3175  *                X on writing X addresses to the RAR table
3176  **/
3177 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
3178 {
3179         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3180         struct ixgbe_hw *hw = &adapter->hw;
3181         unsigned int vfn = adapter->num_vfs;
3182         unsigned int rar_entries = IXGBE_MAX_PF_MACVLANS;
3183         int count = 0;
3184
3185         /* return ENOMEM indicating insufficient memory for addresses */
3186         if (netdev_uc_count(netdev) > rar_entries)
3187                 return -ENOMEM;
3188
3189         if (!netdev_uc_empty(netdev) && rar_entries) {
3190                 struct netdev_hw_addr *ha;
3191                 /* return error if we do not support writing to RAR table */
3192                 if (!hw->mac.ops.set_rar)
3193                         return -ENOMEM;
3194
3195                 netdev_for_each_uc_addr(ha, netdev) {
3196                         if (!rar_entries)
3197                                 break;
3198                         hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3199                                             vfn, IXGBE_RAH_AV);
3200                         count++;
3201                 }
3202         }
3203         /* write the addresses in reverse order to avoid write combining */
3204         for (; rar_entries > 0 ; rar_entries--)
3205                 hw->mac.ops.clear_rar(hw, rar_entries);
3206
3207         return count;
3208 }
3209
3210 /**
3211  * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3212  * @netdev: network interface device structure
3213  *
3214  * The set_rx_method entry point is called whenever the unicast/multicast
3215  * address list or the network interface flags are updated.  This routine is
3216  * responsible for configuring the hardware for proper unicast, multicast and
3217  * promiscuous mode.
3218  **/
3219 void ixgbe_set_rx_mode(struct net_device *netdev)
3220 {
3221         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3222         struct ixgbe_hw *hw = &adapter->hw;
3223         u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3224         int count;
3225
3226         /* Check for Promiscuous and All Multicast modes */
3227
3228         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3229
3230         /* set all bits that we expect to always be set */
3231         fctrl |= IXGBE_FCTRL_BAM;
3232         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3233         fctrl |= IXGBE_FCTRL_PMCF;
3234
3235         /* clear the bits we are changing the status of */
3236         fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3237
3238         if (netdev->flags & IFF_PROMISC) {
3239                 hw->addr_ctrl.user_set_promisc = true;
3240                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3241                 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3242                 /* don't hardware filter vlans in promisc mode */
3243                 ixgbe_vlan_filter_disable(adapter);
3244         } else {
3245                 if (netdev->flags & IFF_ALLMULTI) {
3246                         fctrl |= IXGBE_FCTRL_MPE;
3247                         vmolr |= IXGBE_VMOLR_MPE;
3248                 } else {
3249                         /*
3250                          * Write addresses to the MTA, if the attempt fails
3251                          * then we should just turn on promiscuous mode so
3252                          * that we can at least receive multicast traffic
3253                          */
3254                         hw->mac.ops.update_mc_addr_list(hw, netdev);
3255                         vmolr |= IXGBE_VMOLR_ROMPE;
3256                 }
3257                 ixgbe_vlan_filter_enable(adapter);
3258                 hw->addr_ctrl.user_set_promisc = false;
3259                 /*
3260                  * Write addresses to available RAR registers, if there is not
3261                  * sufficient space to store all the addresses then enable
3262                  * unicast promiscuous mode
3263                  */
3264                 count = ixgbe_write_uc_addr_list(netdev);
3265                 if (count < 0) {
3266                         fctrl |= IXGBE_FCTRL_UPE;
3267                         vmolr |= IXGBE_VMOLR_ROPE;
3268                 }
3269         }
3270
3271         if (adapter->num_vfs) {
3272                 ixgbe_restore_vf_multicasts(adapter);
3273                 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3274                          ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3275                            IXGBE_VMOLR_ROPE);
3276                 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3277         }
3278
3279         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3280
3281         if (netdev->features & NETIF_F_HW_VLAN_RX)
3282                 ixgbe_vlan_strip_enable(adapter);
3283         else
3284                 ixgbe_vlan_strip_disable(adapter);
3285 }
3286
3287 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3288 {
3289         int q_idx;
3290         struct ixgbe_q_vector *q_vector;
3291         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3292
3293         /* legacy and MSI only use one vector */
3294         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3295                 q_vectors = 1;
3296
3297         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3298                 q_vector = adapter->q_vector[q_idx];
3299                 napi_enable(&q_vector->napi);
3300         }
3301 }
3302
3303 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3304 {
3305         int q_idx;
3306         struct ixgbe_q_vector *q_vector;
3307         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3308
3309         /* legacy and MSI only use one vector */
3310         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3311                 q_vectors = 1;
3312
3313         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3314                 q_vector = adapter->q_vector[q_idx];
3315                 napi_disable(&q_vector->napi);
3316         }
3317 }
3318
3319 #ifdef CONFIG_IXGBE_DCB
3320 /*
3321  * ixgbe_configure_dcb - Configure DCB hardware
3322  * @adapter: ixgbe adapter struct
3323  *
3324  * This is called by the driver on open to configure the DCB hardware.
3325  * This is also called by the gennetlink interface when reconfiguring
3326  * the DCB state.
3327  */
3328 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3329 {
3330         struct ixgbe_hw *hw = &adapter->hw;
3331         int max_frame = adapter->netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3332
3333         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3334                 if (hw->mac.type == ixgbe_mac_82598EB)
3335                         netif_set_gso_max_size(adapter->netdev, 65536);
3336                 return;
3337         }
3338
3339         if (hw->mac.type == ixgbe_mac_82598EB)
3340                 netif_set_gso_max_size(adapter->netdev, 32768);
3341
3342
3343         /* Enable VLAN tag insert/strip */
3344         adapter->netdev->features |= NETIF_F_HW_VLAN_RX;
3345
3346         hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3347
3348         /* reconfigure the hardware */
3349         if (adapter->dcbx_cap & DCB_CAP_DCBX_VER_CEE) {
3350 #ifdef IXGBE_FCOE
3351                 if (adapter->netdev->features & NETIF_F_FCOE_MTU)
3352                         max_frame = max(max_frame, IXGBE_FCOE_JUMBO_FRAME_SIZE);
3353 #endif
3354                 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3355                                                 DCB_TX_CONFIG);
3356                 ixgbe_dcb_calculate_tc_credits(hw, &adapter->dcb_cfg, max_frame,
3357                                                 DCB_RX_CONFIG);
3358                 ixgbe_dcb_hw_config(hw, &adapter->dcb_cfg);
3359         } else {
3360                 struct net_device *dev = adapter->netdev;
3361
3362                 if (adapter->ixgbe_ieee_ets) {
3363                         struct ieee_ets *ets = adapter->ixgbe_ieee_ets;
3364                         int max_frame = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
3365
3366                         ixgbe_dcb_hw_ets(&adapter->hw, ets, max_frame);
3367                 }
3368
3369                 if (adapter->ixgbe_ieee_pfc) {
3370                         struct ieee_pfc *pfc = adapter->ixgbe_ieee_pfc;
3371                         u8 *prio_tc = adapter->ixgbe_ieee_ets->prio_tc;
3372
3373                         ixgbe_dcb_hw_pfc_config(&adapter->hw, pfc->pfc_en,
3374                                                 prio_tc);
3375                 }
3376         }
3377
3378         /* Enable RSS Hash per TC */
3379         if (hw->mac.type != ixgbe_mac_82598EB) {
3380                 int i;
3381                 u32 reg = 0;
3382
3383                 for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
3384                         u8 msb = 0;
3385                         u8 cnt = adapter->netdev->tc_to_txq[i].count;
3386
3387                         while (cnt >>= 1)
3388                                 msb++;
3389
3390                         reg |= msb << IXGBE_RQTC_SHIFT_TC(i);
3391                 }
3392                 IXGBE_WRITE_REG(hw, IXGBE_RQTC, reg);
3393         }
3394 }
3395 #endif
3396
3397 /* Additional bittime to account for IXGBE framing */
3398 #define IXGBE_ETH_FRAMING 20
3399
3400 /*
3401  * ixgbe_hpbthresh - calculate high water mark for flow control
3402  *
3403  * @adapter: board private structure to calculate for
3404  * @pb - packet buffer to calculate
3405  */
3406 static int ixgbe_hpbthresh(struct ixgbe_adapter *adapter, int pb)
3407 {
3408         struct ixgbe_hw *hw = &adapter->hw;
3409         struct net_device *dev = adapter->netdev;
3410         int link, tc, kb, marker;
3411         u32 dv_id, rx_pba;
3412
3413         /* Calculate max LAN frame size */
3414         tc = link = dev->mtu + ETH_HLEN + ETH_FCS_LEN + IXGBE_ETH_FRAMING;
3415
3416 #ifdef IXGBE_FCOE
3417         /* FCoE traffic class uses FCOE jumbo frames */
3418         if (dev->features & NETIF_F_FCOE_MTU) {
3419                 int fcoe_pb = 0;
3420
3421 #ifdef CONFIG_IXGBE_DCB
3422                 fcoe_pb = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
3423
3424 #endif
3425                 if (fcoe_pb == pb && tc < IXGBE_FCOE_JUMBO_FRAME_SIZE)
3426                         tc = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3427         }
3428 #endif
3429
3430         /* Calculate delay value for device */
3431         switch (hw->mac.type) {
3432         case ixgbe_mac_X540:
3433                 dv_id = IXGBE_DV_X540(link, tc);
3434                 break;
3435         default:
3436                 dv_id = IXGBE_DV(link, tc);
3437                 break;
3438         }
3439
3440         /* Loopback switch introduces additional latency */
3441         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3442                 dv_id += IXGBE_B2BT(tc);
3443
3444         /* Delay value is calculated in bit times convert to KB */
3445         kb = IXGBE_BT2KB(dv_id);
3446         rx_pba = IXGBE_READ_REG(hw, IXGBE_RXPBSIZE(pb)) >> 10;
3447
3448         marker = rx_pba - kb;
3449
3450         /* It is possible that the packet buffer is not large enough
3451          * to provide required headroom. In this case throw an error
3452          * to user and a do the best we can.
3453          */
3454         if (marker < 0) {
3455                 e_warn(drv, "Packet Buffer(%i) can not provide enough"
3456                             "headroom to support flow control."
3457                             "Decrease MTU or number of traffic classes\n", pb);
3458                 marker = tc + 1;
3459         }
3460
3461         return marker;
3462 }
3463
3464 /*
3465  * ixgbe_lpbthresh - calculate low water mark for for flow control
3466  *
3467  * @adapter: board private structure to calculate for
3468  * @pb - packet buffer to calculate
3469  */
3470 static int ixgbe_lpbthresh(struct ixgbe_adapter *adapter)
3471 {
3472         struct ixgbe_hw *hw = &adapter->hw;
3473         struct net_device *dev = adapter->netdev;
3474         int tc;
3475         u32 dv_id;
3476
3477         /* Calculate max LAN frame size */
3478         tc = dev->mtu + ETH_HLEN + ETH_FCS_LEN;
3479
3480         /* Calculate delay value for device */
3481         switch (hw->mac.type) {
3482         case ixgbe_mac_X540:
3483                 dv_id = IXGBE_LOW_DV_X540(tc);
3484                 break;
3485         default:
3486                 dv_id = IXGBE_LOW_DV(tc);
3487                 break;
3488         }
3489
3490         /* Delay value is calculated in bit times convert to KB */
3491         return IXGBE_BT2KB(dv_id);
3492 }
3493
3494 /*
3495  * ixgbe_pbthresh_setup - calculate and setup high low water marks
3496  */
3497 static void ixgbe_pbthresh_setup(struct ixgbe_adapter *adapter)
3498 {
3499         struct ixgbe_hw *hw = &adapter->hw;
3500         int num_tc = netdev_get_num_tc(adapter->netdev);
3501         int i;
3502
3503         if (!num_tc)
3504                 num_tc = 1;
3505
3506         hw->fc.low_water = ixgbe_lpbthresh(adapter);
3507
3508         for (i = 0; i < num_tc; i++) {
3509                 hw->fc.high_water[i] = ixgbe_hpbthresh(adapter, i);
3510
3511                 /* Low water marks must not be larger than high water marks */
3512                 if (hw->fc.low_water > hw->fc.high_water[i])
3513                         hw->fc.low_water = 0;
3514         }
3515 }
3516
3517 static void ixgbe_configure_pb(struct ixgbe_adapter *adapter)
3518 {
3519         struct ixgbe_hw *hw = &adapter->hw;
3520         int hdrm;
3521         u8 tc = netdev_get_num_tc(adapter->netdev);
3522
3523         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3524             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3525                 hdrm = 32 << adapter->fdir_pballoc;
3526         else
3527                 hdrm = 0;
3528
3529         hw->mac.ops.set_rxpba(hw, tc, hdrm, PBA_STRATEGY_EQUAL);
3530         ixgbe_pbthresh_setup(adapter);
3531 }
3532
3533 static void ixgbe_fdir_filter_restore(struct ixgbe_adapter *adapter)
3534 {
3535         struct ixgbe_hw *hw = &adapter->hw;
3536         struct hlist_node *node, *node2;
3537         struct ixgbe_fdir_filter *filter;
3538
3539         spin_lock(&adapter->fdir_perfect_lock);
3540
3541         if (!hlist_empty(&adapter->fdir_filter_list))
3542                 ixgbe_fdir_set_input_mask_82599(hw, &adapter->fdir_mask);
3543
3544         hlist_for_each_entry_safe(filter, node, node2,
3545                                   &adapter->fdir_filter_list, fdir_node) {
3546                 ixgbe_fdir_write_perfect_filter_82599(hw,
3547                                 &filter->filter,
3548                                 filter->sw_idx,
3549                                 (filter->action == IXGBE_FDIR_DROP_QUEUE) ?
3550                                 IXGBE_FDIR_DROP_QUEUE :
3551                                 adapter->rx_ring[filter->action]->reg_idx);
3552         }
3553
3554         spin_unlock(&adapter->fdir_perfect_lock);
3555 }
3556
3557 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3558 {
3559         ixgbe_configure_pb(adapter);
3560 #ifdef CONFIG_IXGBE_DCB
3561         ixgbe_configure_dcb(adapter);
3562 #endif
3563
3564         ixgbe_set_rx_mode(adapter->netdev);
3565         ixgbe_restore_vlan(adapter);
3566
3567 #ifdef IXGBE_FCOE
3568         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3569                 ixgbe_configure_fcoe(adapter);
3570
3571 #endif /* IXGBE_FCOE */
3572         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3573                 ixgbe_init_fdir_signature_82599(&adapter->hw,
3574                                                 adapter->fdir_pballoc);
3575         } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3576                 ixgbe_init_fdir_perfect_82599(&adapter->hw,
3577                                               adapter->fdir_pballoc);
3578                 ixgbe_fdir_filter_restore(adapter);
3579         }
3580
3581         ixgbe_configure_virtualization(adapter);
3582
3583         ixgbe_configure_tx(adapter);
3584         ixgbe_configure_rx(adapter);
3585 }
3586
3587 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3588 {
3589         switch (hw->phy.type) {
3590         case ixgbe_phy_sfp_avago:
3591         case ixgbe_phy_sfp_ftl:
3592         case ixgbe_phy_sfp_intel:
3593         case ixgbe_phy_sfp_unknown:
3594         case ixgbe_phy_sfp_passive_tyco:
3595         case ixgbe_phy_sfp_passive_unknown:
3596         case ixgbe_phy_sfp_active_unknown:
3597         case ixgbe_phy_sfp_ftl_active:
3598                 return true;
3599         case ixgbe_phy_nl:
3600                 if (hw->mac.type == ixgbe_mac_82598EB)
3601                         return true;
3602         default:
3603                 return false;
3604         }
3605 }
3606
3607 /**
3608  * ixgbe_sfp_link_config - set up SFP+ link
3609  * @adapter: pointer to private adapter struct
3610  **/
3611 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3612 {
3613         /*
3614          * We are assuming the worst case scenerio here, and that
3615          * is that an SFP was inserted/removed after the reset
3616          * but before SFP detection was enabled.  As such the best
3617          * solution is to just start searching as soon as we start
3618          */
3619         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
3620                 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
3621
3622         adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
3623 }
3624
3625 /**
3626  * ixgbe_non_sfp_link_config - set up non-SFP+ link
3627  * @hw: pointer to private hardware struct
3628  *
3629  * Returns 0 on success, negative on failure
3630  **/
3631 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3632 {
3633         u32 autoneg;
3634         bool negotiation, link_up = false;
3635         u32 ret = IXGBE_ERR_LINK_SETUP;
3636
3637         if (hw->mac.ops.check_link)
3638                 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3639
3640         if (ret)
3641                 goto link_cfg_out;
3642
3643         autoneg = hw->phy.autoneg_advertised;
3644         if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
3645                 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg,
3646                                                         &negotiation);
3647         if (ret)
3648                 goto link_cfg_out;
3649
3650         if (hw->mac.ops.setup_link)
3651                 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3652 link_cfg_out:
3653         return ret;
3654 }
3655
3656 static void ixgbe_setup_gpie(struct ixgbe_adapter *adapter)
3657 {
3658         struct ixgbe_hw *hw = &adapter->hw;
3659         u32 gpie = 0;
3660
3661         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3662                 gpie = IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_PBA_SUPPORT |
3663                        IXGBE_GPIE_OCD;
3664                 gpie |= IXGBE_GPIE_EIAME;
3665                 /*
3666                  * use EIAM to auto-mask when MSI-X interrupt is asserted
3667                  * this saves a register write for every interrupt
3668                  */
3669                 switch (hw->mac.type) {
3670                 case ixgbe_mac_82598EB:
3671                         IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3672                         break;
3673                 case ixgbe_mac_82599EB:
3674                 case ixgbe_mac_X540:
3675                 default:
3676                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3677                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3678                         break;
3679                 }
3680         } else {
3681                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3682                  * specifically only auto mask tx and rx interrupts */
3683                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3684         }
3685
3686         /* XXX: to interrupt immediately for EICS writes, enable this */
3687         /* gpie |= IXGBE_GPIE_EIMEN; */
3688
3689         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3690                 gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3691                 gpie |= IXGBE_GPIE_VTMODE_64;
3692         }
3693
3694         /* Enable Thermal over heat sensor interrupt */
3695         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
3696                 switch (adapter->hw.mac.type) {
3697                 case ixgbe_mac_82599EB:
3698                         gpie |= IXGBE_SDP0_GPIEN;
3699                         break;
3700                 case ixgbe_mac_X540:
3701                         gpie |= IXGBE_EIMS_TS;
3702                         break;
3703                 default:
3704                         break;
3705                 }
3706         }
3707
3708         /* Enable fan failure interrupt */
3709         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
3710                 gpie |= IXGBE_SDP1_GPIEN;
3711
3712         if (hw->mac.type == ixgbe_mac_82599EB) {
3713                 gpie |= IXGBE_SDP1_GPIEN;
3714                 gpie |= IXGBE_SDP2_GPIEN;
3715         }
3716
3717         IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3718 }
3719
3720 static void ixgbe_up_complete(struct ixgbe_adapter *adapter)
3721 {
3722         struct ixgbe_hw *hw = &adapter->hw;
3723         int err;
3724         u32 ctrl_ext;
3725
3726         ixgbe_get_hw_control(adapter);
3727         ixgbe_setup_gpie(adapter);
3728
3729         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3730                 ixgbe_configure_msix(adapter);
3731         else
3732                 ixgbe_configure_msi_and_legacy(adapter);
3733
3734         /* enable the optics for both mult-speed fiber and 82599 SFP+ fiber */
3735         if (hw->mac.ops.enable_tx_laser &&
3736             ((hw->phy.multispeed_fiber) ||
3737              ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
3738               (hw->mac.type == ixgbe_mac_82599EB))))
3739                 hw->mac.ops.enable_tx_laser(hw);
3740
3741         clear_bit(__IXGBE_DOWN, &adapter->state);
3742         ixgbe_napi_enable_all(adapter);
3743
3744         if (ixgbe_is_sfp(hw)) {
3745                 ixgbe_sfp_link_config(adapter);
3746         } else {
3747                 err = ixgbe_non_sfp_link_config(hw);
3748                 if (err)
3749                         e_err(probe, "link_config FAILED %d\n", err);
3750         }
3751
3752         /* clear any pending interrupts, may auto mask */
3753         IXGBE_READ_REG(hw, IXGBE_EICR);
3754         ixgbe_irq_enable(adapter, true, true);
3755
3756         /*
3757          * If this adapter has a fan, check to see if we had a failure
3758          * before we enabled the interrupt.
3759          */
3760         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3761                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3762                 if (esdp & IXGBE_ESDP_SDP1)
3763                         e_crit(drv, "Fan has stopped, replace the adapter\n");
3764         }
3765
3766         /* enable transmits */
3767         netif_tx_start_all_queues(adapter->netdev);
3768
3769         /* bring the link up in the watchdog, this could race with our first
3770          * link up interrupt but shouldn't be a problem */
3771         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3772         adapter->link_check_timeout = jiffies;
3773         mod_timer(&adapter->service_timer, jiffies);
3774
3775         /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3776         ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3777         ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3778         IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3779 }
3780
3781 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3782 {
3783         WARN_ON(in_interrupt());
3784         /* put off any impending NetWatchDogTimeout */
3785         adapter->netdev->trans_start = jiffies;
3786
3787         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3788                 usleep_range(1000, 2000);
3789         ixgbe_down(adapter);
3790         /*
3791          * If SR-IOV enabled then wait a bit before bringing the adapter
3792          * back up to give the VFs time to respond to the reset.  The
3793          * two second wait is based upon the watchdog timer cycle in
3794          * the VF driver.
3795          */
3796         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3797                 msleep(2000);
3798         ixgbe_up(adapter);
3799         clear_bit(__IXGBE_RESETTING, &adapter->state);
3800 }
3801
3802 void ixgbe_up(struct ixgbe_adapter *adapter)
3803 {
3804         /* hardware has been reset, we need to reload some things */
3805         ixgbe_configure(adapter);
3806
3807         ixgbe_up_complete(adapter);
3808 }
3809
3810 void ixgbe_reset(struct ixgbe_adapter *adapter)
3811 {
3812         struct ixgbe_hw *hw = &adapter->hw;
3813         int err;
3814
3815         /* lock SFP init bit to prevent race conditions with the watchdog */
3816         while (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
3817                 usleep_range(1000, 2000);
3818
3819         /* clear all SFP and link config related flags while holding SFP_INIT */
3820         adapter->flags2 &= ~(IXGBE_FLAG2_SEARCH_FOR_SFP |
3821                              IXGBE_FLAG2_SFP_NEEDS_RESET);
3822         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
3823
3824         err = hw->mac.ops.init_hw(hw);
3825         switch (err) {
3826         case 0:
3827         case IXGBE_ERR_SFP_NOT_PRESENT:
3828         case IXGBE_ERR_SFP_NOT_SUPPORTED:
3829                 break;
3830         case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3831                 e_dev_err("master disable timed out\n");
3832                 break;
3833         case IXGBE_ERR_EEPROM_VERSION:
3834                 /* We are running on a pre-production device, log a warning */
3835                 e_dev_warn("This device is a pre-production adapter/LOM. "
3836                            "Please be aware there may be issuesassociated with "
3837                            "your hardware.  If you are experiencing problems "
3838                            "please contact your Intel or hardware "
3839                            "representative who provided you with this "
3840                            "hardware.\n");
3841                 break;
3842         default:
3843                 e_dev_err("Hardware Error: %d\n", err);
3844         }
3845
3846         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
3847
3848         /* reprogram the RAR[0] in case user changed it. */
3849         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3850                             IXGBE_RAH_AV);
3851 }
3852
3853 /**
3854  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3855  * @rx_ring: ring to free buffers from
3856  **/
3857 static void ixgbe_clean_rx_ring(struct ixgbe_ring *rx_ring)
3858 {
3859         struct device *dev = rx_ring->dev;
3860         unsigned long size;
3861         u16 i;
3862
3863         /* ring already cleared, nothing to do */
3864         if (!rx_ring->rx_buffer_info)
3865                 return;
3866
3867         /* Free all the Rx ring sk_buffs */
3868         for (i = 0; i < rx_ring->count; i++) {
3869                 struct ixgbe_rx_buffer *rx_buffer_info;
3870
3871                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3872                 if (rx_buffer_info->dma) {
3873                         dma_unmap_single(rx_ring->dev, rx_buffer_info->dma,
3874                                          rx_ring->rx_buf_len,
3875                                          DMA_FROM_DEVICE);
3876                         rx_buffer_info->dma = 0;
3877                 }
3878                 if (rx_buffer_info->skb) {
3879                         struct sk_buff *skb = rx_buffer_info->skb;
3880                         rx_buffer_info->skb = NULL;
3881                         do {
3882                                 struct sk_buff *this = skb;
3883                                 if (IXGBE_RSC_CB(this)->delay_unmap) {
3884                                         dma_unmap_single(dev,
3885                                                          IXGBE_RSC_CB(this)->dma,
3886                                                          rx_ring->rx_buf_len,
3887                                                          DMA_FROM_DEVICE);
3888                                         IXGBE_RSC_CB(this)->dma = 0;
3889                                         IXGBE_RSC_CB(skb)->delay_unmap = false;
3890                                 }
3891                                 skb = skb->prev;
3892                                 dev_kfree_skb(this);
3893                         } while (skb);
3894                 }
3895                 if (!rx_buffer_info->page)
3896                         continue;
3897                 if (rx_buffer_info->page_dma) {
3898                         dma_unmap_page(dev, rx_buffer_info->page_dma,
3899                                        PAGE_SIZE / 2, DMA_FROM_DEVICE);
3900                         rx_buffer_info->page_dma = 0;
3901                 }
3902                 put_page(rx_buffer_info->page);
3903                 rx_buffer_info->page = NULL;
3904                 rx_buffer_info->page_offset = 0;
3905         }
3906
3907         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3908         memset(rx_ring->rx_buffer_info, 0, size);
3909
3910         /* Zero out the descriptor ring */
3911         memset(rx_ring->desc, 0, rx_ring->size);
3912
3913         rx_ring->next_to_clean = 0;
3914         rx_ring->next_to_use = 0;
3915 }
3916
3917 /**
3918  * ixgbe_clean_tx_ring - Free Tx Buffers
3919  * @tx_ring: ring to be cleaned
3920  **/
3921 static void ixgbe_clean_tx_ring(struct ixgbe_ring *tx_ring)
3922 {
3923         struct ixgbe_tx_buffer *tx_buffer_info;
3924         unsigned long size;
3925         u16 i;
3926
3927         /* ring already cleared, nothing to do */
3928         if (!tx_ring->tx_buffer_info)
3929                 return;
3930
3931         /* Free all the Tx ring sk_buffs */
3932         for (i = 0; i < tx_ring->count; i++) {
3933                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3934                 ixgbe_unmap_and_free_tx_resource(tx_ring, tx_buffer_info);
3935         }
3936
3937         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3938         memset(tx_ring->tx_buffer_info, 0, size);
3939
3940         /* Zero out the descriptor ring */
3941         memset(tx_ring->desc, 0, tx_ring->size);
3942
3943         tx_ring->next_to_use = 0;
3944         tx_ring->next_to_clean = 0;
3945 }
3946
3947 /**
3948  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3949  * @adapter: board private structure
3950  **/
3951 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3952 {
3953         int i;
3954
3955         for (i = 0; i < adapter->num_rx_queues; i++)
3956                 ixgbe_clean_rx_ring(adapter->rx_ring[i]);
3957 }
3958
3959 /**
3960  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3961  * @adapter: board private structure
3962  **/
3963 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3964 {
3965         int i;
3966
3967         for (i = 0; i < adapter->num_tx_queues; i++)
3968                 ixgbe_clean_tx_ring(adapter->tx_ring[i]);
3969 }
3970
3971 static void ixgbe_fdir_filter_exit(struct ixgbe_adapter *adapter)
3972 {
3973         struct hlist_node *node, *node2;
3974         struct ixgbe_fdir_filter *filter;
3975
3976         spin_lock(&adapter->fdir_perfect_lock);
3977
3978         hlist_for_each_entry_safe(filter, node, node2,
3979                                   &adapter->fdir_filter_list, fdir_node) {
3980                 hlist_del(&filter->fdir_node);
3981                 kfree(filter);
3982         }
3983         adapter->fdir_filter_count = 0;
3984
3985         spin_unlock(&adapter->fdir_perfect_lock);
3986 }
3987
3988 void ixgbe_down(struct ixgbe_adapter *adapter)
3989 {
3990         struct net_device *netdev = adapter->netdev;
3991         struct ixgbe_hw *hw = &adapter->hw;
3992         u32 rxctrl;
3993         int i;
3994
3995         /* signal that we are down to the interrupt handler */
3996         set_bit(__IXGBE_DOWN, &adapter->state);
3997
3998         /* disable receives */
3999         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
4000         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
4001
4002         /* disable all enabled rx queues */
4003         for (i = 0; i < adapter->num_rx_queues; i++)
4004                 /* this call also flushes the previous write */
4005                 ixgbe_disable_rx_queue(adapter, adapter->rx_ring[i]);
4006
4007         usleep_range(10000, 20000);
4008
4009         netif_tx_stop_all_queues(netdev);
4010
4011         /* call carrier off first to avoid false dev_watchdog timeouts */
4012         netif_carrier_off(netdev);
4013         netif_tx_disable(netdev);
4014
4015         ixgbe_irq_disable(adapter);
4016
4017         ixgbe_napi_disable_all(adapter);
4018
4019         adapter->flags2 &= ~(IXGBE_FLAG2_FDIR_REQUIRES_REINIT |
4020                              IXGBE_FLAG2_RESET_REQUESTED);
4021         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
4022
4023         del_timer_sync(&adapter->service_timer);
4024
4025         if (adapter->num_vfs) {
4026                 /* Clear EITR Select mapping */
4027                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
4028
4029                 /* Mark all the VFs as inactive */
4030                 for (i = 0 ; i < adapter->num_vfs; i++)
4031                         adapter->vfinfo[i].clear_to_send = 0;
4032
4033                 /* ping all the active vfs to let them know we are going down */
4034                 ixgbe_ping_all_vfs(adapter);
4035
4036                 /* Disable all VFTE/VFRE TX/RX */
4037                 ixgbe_disable_tx_rx(adapter);
4038         }
4039
4040         /* disable transmits in the hardware now that interrupts are off */
4041         for (i = 0; i < adapter->num_tx_queues; i++) {
4042                 u8 reg_idx = adapter->tx_ring[i]->reg_idx;
4043                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(reg_idx), IXGBE_TXDCTL_SWFLSH);
4044         }
4045
4046         /* Disable the Tx DMA engine on 82599 and X540 */
4047         switch (hw->mac.type) {
4048         case ixgbe_mac_82599EB:
4049         case ixgbe_mac_X540:
4050                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
4051                                 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
4052                                  ~IXGBE_DMATXCTL_TE));
4053                 break;
4054         default:
4055                 break;
4056         }
4057
4058         if (!pci_channel_offline(adapter->pdev))
4059                 ixgbe_reset(adapter);
4060
4061         /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
4062         if (hw->mac.ops.disable_tx_laser &&
4063             ((hw->phy.multispeed_fiber) ||
4064              ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
4065               (hw->mac.type == ixgbe_mac_82599EB))))
4066                 hw->mac.ops.disable_tx_laser(hw);
4067
4068         ixgbe_clean_all_tx_rings(adapter);
4069         ixgbe_clean_all_rx_rings(adapter);
4070
4071 #ifdef CONFIG_IXGBE_DCA
4072         /* since we reset the hardware DCA settings were cleared */
4073         ixgbe_setup_dca(adapter);
4074 #endif
4075 }
4076
4077 /**
4078  * ixgbe_poll - NAPI Rx polling callback
4079  * @napi: structure for representing this polling device
4080  * @budget: how many packets driver is allowed to clean
4081  *
4082  * This function is used for legacy and MSI, NAPI mode
4083  **/
4084 static int ixgbe_poll(struct napi_struct *napi, int budget)
4085 {
4086         struct ixgbe_q_vector *q_vector =
4087                                 container_of(napi, struct ixgbe_q_vector, napi);
4088         struct ixgbe_adapter *adapter = q_vector->adapter;
4089         struct ixgbe_ring *ring;
4090         int per_ring_budget;
4091         bool clean_complete = true;
4092
4093 #ifdef CONFIG_IXGBE_DCA
4094         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
4095                 ixgbe_update_dca(q_vector);
4096 #endif
4097
4098         for (ring = q_vector->tx.ring; ring != NULL; ring = ring->next)
4099                 clean_complete &= !!ixgbe_clean_tx_irq(q_vector, ring);
4100
4101         /* attempt to distribute budget to each queue fairly, but don't allow
4102          * the budget to go below 1 because we'll exit polling */
4103         if (q_vector->rx.count > 1)
4104                 per_ring_budget = max(budget/q_vector->rx.count, 1);
4105         else
4106                 per_ring_budget = budget;
4107
4108         for (ring = q_vector->rx.ring; ring != NULL; ring = ring->next)
4109                 clean_complete &= ixgbe_clean_rx_irq(q_vector, ring,
4110                                                      per_ring_budget);
4111
4112         /* If all work not completed, return budget and keep polling */
4113         if (!clean_complete)
4114                 return budget;
4115
4116         /* all work done, exit the polling mode */
4117         napi_complete(napi);
4118         if (adapter->rx_itr_setting & 1)
4119                 ixgbe_set_itr(q_vector);
4120         if (!test_bit(__IXGBE_DOWN, &adapter->state))
4121                 ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
4122
4123         return 0;
4124 }
4125
4126 /**
4127  * ixgbe_tx_timeout - Respond to a Tx Hang
4128  * @netdev: network interface device structure
4129  **/
4130 static void ixgbe_tx_timeout(struct net_device *netdev)
4131 {
4132         struct ixgbe_adapter *adapter = netdev_priv(netdev);
4133
4134         /* Do the reset outside of interrupt context */
4135         ixgbe_tx_timeout_reset(adapter);
4136 }
4137
4138 /**
4139  * ixgbe_set_rss_queues: Allocate queues for RSS
4140  * @adapter: board private structure to initialize
4141  *
4142  * This is our "base" multiqueue mode.  RSS (Receive Side Scaling) will try
4143  * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
4144  *
4145  **/
4146 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
4147 {
4148         bool ret = false;
4149         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
4150
4151         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4152                 f->mask = 0xF;
4153                 adapter->num_rx_queues = f->indices;
4154                 adapter->num_tx_queues = f->indices;
4155                 ret = true;
4156         } else {
4157                 ret = false;
4158         }
4159
4160         return ret;
4161 }
4162
4163 /**
4164  * ixgbe_set_fdir_queues: Allocate queues for Flow Director
4165  * @adapter: board private structure to initialize
4166  *
4167  * Flow Director is an advanced Rx filter, attempting to get Rx flows back
4168  * to the original CPU that initiated the Tx session.  This runs in addition
4169  * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
4170  * Rx load across CPUs using RSS.
4171  *
4172  **/
4173 static inline bool ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
4174 {
4175         bool ret = false;
4176         struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
4177
4178         f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
4179         f_fdir->mask = 0;
4180
4181         /* Flow Director must have RSS enabled */
4182         if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4183             (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4184                 adapter->num_tx_queues = f_fdir->indices;
4185                 adapter->num_rx_queues = f_fdir->indices;
4186                 ret = true;
4187         } else {
4188                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4189         }
4190         return ret;
4191 }
4192
4193 #ifdef IXGBE_FCOE
4194 /**
4195  * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
4196  * @adapter: board private structure to initialize
4197  *
4198  * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
4199  * The ring feature mask is not used as a mask for FCoE, as it can take any 8
4200  * rx queues out of the max number of rx queues, instead, it is used as the
4201  * index of the first rx queue used by FCoE.
4202  *
4203  **/
4204 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
4205 {
4206         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4207
4208         if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4209                 return false;
4210
4211         f->indices = min((int)num_online_cpus(), f->indices);
4212
4213         adapter->num_rx_queues = 1;
4214         adapter->num_tx_queues = 1;
4215
4216         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4217                 e_info(probe, "FCoE enabled with RSS\n");
4218                 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4219                         ixgbe_set_fdir_queues(adapter);
4220                 else
4221                         ixgbe_set_rss_queues(adapter);
4222         }
4223
4224         /* adding FCoE rx rings to the end */
4225         f->mask = adapter->num_rx_queues;
4226         adapter->num_rx_queues += f->indices;
4227         adapter->num_tx_queues += f->indices;
4228
4229         return true;
4230 }
4231 #endif /* IXGBE_FCOE */
4232
4233 /* Artificial max queue cap per traffic class in DCB mode */
4234 #define DCB_QUEUE_CAP 8
4235
4236 #ifdef CONFIG_IXGBE_DCB
4237 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
4238 {
4239         int per_tc_q, q, i, offset = 0;
4240         struct net_device *dev = adapter->netdev;
4241         int tcs = netdev_get_num_tc(dev);
4242
4243         if (!tcs)
4244                 return false;
4245
4246         /* Map queue offset and counts onto allocated tx queues */
4247         per_tc_q = min(dev->num_tx_queues / tcs, (unsigned int)DCB_QUEUE_CAP);
4248         q = min((int)num_online_cpus(), per_tc_q);
4249
4250         for (i = 0; i < tcs; i++) {
4251                 netdev_set_tc_queue(dev, i, q, offset);
4252                 offset += q;
4253         }
4254
4255         adapter->num_tx_queues = q * tcs;
4256         adapter->num_rx_queues = q * tcs;
4257
4258 #ifdef IXGBE_FCOE
4259         /* FCoE enabled queues require special configuration indexed
4260          * by feature specific indices and mask. Here we map FCoE
4261          * indices onto the DCB queue pairs allowing FCoE to own
4262          * configuration later.
4263          */
4264         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4265                 int tc;
4266                 struct ixgbe_ring_feature *f =
4267                                         &adapter->ring_feature[RING_F_FCOE];
4268
4269                 tc = netdev_get_prio_tc_map(dev, adapter->fcoe.up);
4270                 f->indices = dev->tc_to_txq[tc].count;
4271                 f->mask = dev->tc_to_txq[tc].offset;
4272         }
4273 #endif
4274
4275         return true;
4276 }
4277 #endif
4278
4279 /**
4280  * ixgbe_set_sriov_queues: Allocate queues for IOV use
4281  * @adapter: board private structure to initialize
4282  *
4283  * IOV doesn't actually use anything, so just NAK the
4284  * request for now and let the other queue routines
4285  * figure out what to do.
4286  */
4287 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4288 {
4289         return false;
4290 }
4291
4292 /*
4293  * ixgbe_set_num_queues: Allocate queues for device, feature dependent
4294  * @adapter: board private structure to initialize
4295  *
4296  * This is the top level queue allocation routine.  The order here is very
4297  * important, starting with the "most" number of features turned on at once,
4298  * and ending with the smallest set of features.  This way large combinations
4299  * can be allocated if they're turned on, and smaller combinations are the
4300  * fallthrough conditions.
4301  *
4302  **/
4303 static int ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4304 {
4305         /* Start with base case */
4306         adapter->num_rx_queues = 1;
4307         adapter->num_tx_queues = 1;
4308         adapter->num_rx_pools = adapter->num_rx_queues;
4309         adapter->num_rx_queues_per_pool = 1;
4310
4311         if (ixgbe_set_sriov_queues(adapter))
4312                 goto done;
4313
4314 #ifdef CONFIG_IXGBE_DCB
4315         if (ixgbe_set_dcb_queues(adapter))
4316                 goto done;
4317
4318 #endif
4319 #ifdef IXGBE_FCOE
4320         if (ixgbe_set_fcoe_queues(adapter))
4321                 goto done;
4322
4323 #endif /* IXGBE_FCOE */
4324         if (ixgbe_set_fdir_queues(adapter))
4325                 goto done;
4326
4327         if (ixgbe_set_rss_queues(adapter))
4328                 goto done;
4329
4330         /* fallback to base case */
4331         adapter->num_rx_queues = 1;
4332         adapter->num_tx_queues = 1;
4333
4334 done:
4335         /* Notify the stack of the (possibly) reduced queue counts. */
4336         netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4337         return netif_set_real_num_rx_queues(adapter->netdev,
4338                                             adapter->num_rx_queues);
4339 }
4340
4341 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4342                                        int vectors)
4343 {
4344         int err, vector_threshold;
4345
4346         /* We'll want at least 3 (vector_threshold):
4347          * 1) TxQ[0] Cleanup
4348          * 2) RxQ[0] Cleanup
4349          * 3) Other (Link Status Change, etc.)
4350          * 4) TCP Timer (optional)
4351          */
4352         vector_threshold = MIN_MSIX_COUNT;
4353
4354         /* The more we get, the more we will assign to Tx/Rx Cleanup
4355          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4356          * Right now, we simply care about how many we'll get; we'll
4357          * set them up later while requesting irq's.
4358          */
4359         while (vectors >= vector_threshold) {
4360                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4361                                       vectors);
4362                 if (!err) /* Success in acquiring all requested vectors. */
4363                         break;
4364                 else if (err < 0)
4365                         vectors = 0; /* Nasty failure, quit now */
4366                 else /* err == number of vectors we should try again with */
4367                         vectors = err;
4368         }
4369
4370         if (vectors < vector_threshold) {
4371                 /* Can't allocate enough MSI-X interrupts?  Oh well.
4372                  * This just means we'll go with either a single MSI
4373                  * vector or fall back to legacy interrupts.
4374                  */
4375                 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4376                              "Unable to allocate MSI-X interrupts\n");
4377                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4378                 kfree(adapter->msix_entries);
4379                 adapter->msix_entries = NULL;
4380         } else {
4381                 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4382                 /*
4383                  * Adjust for only the vectors we'll use, which is minimum
4384                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4385                  * vectors we were allocated.
4386                  */
4387                 adapter->num_msix_vectors = min(vectors,
4388                                    adapter->max_msix_q_vectors + NON_Q_VECTORS);
4389         }
4390 }
4391
4392 /**
4393  * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4394  * @adapter: board private structure to initialize
4395  *
4396  * Cache the descriptor ring offsets for RSS to the assigned rings.
4397  *
4398  **/
4399 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4400 {
4401         int i;
4402
4403         if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
4404                 return false;
4405
4406         for (i = 0; i < adapter->num_rx_queues; i++)
4407                 adapter->rx_ring[i]->reg_idx = i;
4408         for (i = 0; i < adapter->num_tx_queues; i++)
4409                 adapter->tx_ring[i]->reg_idx = i;
4410
4411         return true;
4412 }
4413
4414 #ifdef CONFIG_IXGBE_DCB
4415
4416 /* ixgbe_get_first_reg_idx - Return first register index associated with ring */
4417 static void ixgbe_get_first_reg_idx(struct ixgbe_adapter *adapter, u8 tc,
4418                                     unsigned int *tx, unsigned int *rx)
4419 {
4420         struct net_device *dev = adapter->netdev;
4421         struct ixgbe_hw *hw = &adapter->hw;
4422         u8 num_tcs = netdev_get_num_tc(dev);
4423
4424         *tx = 0;
4425         *rx = 0;
4426
4427         switch (hw->mac.type) {
4428         case ixgbe_mac_82598EB:
4429                 *tx = tc << 2;
4430                 *rx = tc << 3;
4431                 break;
4432         case ixgbe_mac_82599EB:
4433         case ixgbe_mac_X540:
4434                 if (num_tcs > 4) {
4435                         if (tc < 3) {
4436                                 *tx = tc << 5;
4437                                 *rx = tc << 4;
4438                         } else if (tc <  5) {
4439                                 *tx = ((tc + 2) << 4);
4440                                 *rx = tc << 4;
4441                         } else if (tc < num_tcs) {
4442                                 *tx = ((tc + 8) << 3);
4443                                 *rx = tc << 4;
4444                         }
4445                 } else {
4446                         *rx =  tc << 5;
4447                         switch (tc) {
4448                         case 0:
4449                                 *tx =  0;
4450                                 break;
4451                         case 1:
4452                                 *tx = 64;
4453                                 break;
4454                         case 2:
4455                                 *tx = 96;
4456                                 break;
4457                         case 3:
4458                                 *tx = 112;
4459                                 break;
4460                         default:
4461                                 break;
4462                         }
4463                 }
4464                 break;
4465         default:
4466                 break;
4467         }
4468 }
4469
4470 /**
4471  * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4472  * @adapter: board private structure to initialize
4473  *
4474  * Cache the descriptor ring offsets for DCB to the assigned rings.
4475  *
4476  **/
4477 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4478 {
4479         struct net_device *dev = adapter->netdev;
4480         int i, j, k;
4481         u8 num_tcs = netdev_get_num_tc(dev);
4482
4483         if (!num_tcs)
4484                 return false;
4485
4486         for (i = 0, k = 0; i < num_tcs; i++) {
4487                 unsigned int tx_s, rx_s;
4488                 u16 count = dev->tc_to_txq[i].count;
4489
4490                 ixgbe_get_first_reg_idx(adapter, i, &tx_s, &rx_s);
4491                 for (j = 0; j < count; j++, k++) {
4492                         adapter->tx_ring[k]->reg_idx = tx_s + j;
4493                         adapter->rx_ring[k]->reg_idx = rx_s + j;
4494                         adapter->tx_ring[k]->dcb_tc = i;
4495                         adapter->rx_ring[k]->dcb_tc = i;
4496                 }
4497         }
4498
4499         return true;
4500 }
4501 #endif
4502
4503 /**
4504  * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4505  * @adapter: board private structure to initialize
4506  *
4507  * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4508  *
4509  **/
4510 static inline bool ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4511 {
4512         int i;
4513         bool ret = false;
4514
4515         if ((adapter->flags & IXGBE_FLAG_RSS_ENABLED) &&
4516             (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)) {
4517                 for (i = 0; i < adapter->num_rx_queues; i++)
4518                         adapter->rx_ring[i]->reg_idx = i;
4519                 for (i = 0; i < adapter->num_tx_queues; i++)
4520                         adapter->tx_ring[i]->reg_idx = i;
4521                 ret = true;
4522         }
4523
4524         return ret;
4525 }
4526
4527 #ifdef IXGBE_FCOE
4528 /**
4529  * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4530  * @adapter: board private structure to initialize
4531  *
4532  * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4533  *
4534  */
4535 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4536 {
4537         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4538         int i;
4539         u8 fcoe_rx_i = 0, fcoe_tx_i = 0;
4540
4541         if (!(adapter->flags & IXGBE_FLAG_FCOE_ENABLED))
4542                 return false;
4543
4544         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4545                 if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE)
4546                         ixgbe_cache_ring_fdir(adapter);
4547                 else
4548                         ixgbe_cache_ring_rss(adapter);
4549
4550                 fcoe_rx_i = f->mask;
4551                 fcoe_tx_i = f->mask;
4552         }
4553         for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4554                 adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4555                 adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4556         }
4557         return true;
4558 }
4559
4560 #endif /* IXGBE_FCOE */
4561 /**
4562  * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4563  * @adapter: board private structure to initialize
4564  *
4565  * SR-IOV doesn't use any descriptor rings but changes the default if
4566  * no other mapping is used.
4567  *
4568  */
4569 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4570 {
4571         adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4572         adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4573         if (adapter->num_vfs)
4574                 return true;
4575         else
4576                 return false;
4577 }
4578
4579 /**
4580  * ixgbe_cache_ring_register - Descriptor ring to register mapping
4581  * @adapter: board private structure to initialize
4582  *
4583  * Once we know the feature-set enabled for the device, we'll cache
4584  * the register offset the descriptor ring is assigned to.
4585  *
4586  * Note, the order the various feature calls is important.  It must start with
4587  * the "most" features enabled at the same time, then trickle down to the
4588  * least amount of features turned on at once.
4589  **/
4590 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4591 {
4592         /* start with default case */
4593         adapter->rx_ring[0]->reg_idx = 0;
4594         adapter->tx_ring[0]->reg_idx = 0;
4595
4596         if (ixgbe_cache_ring_sriov(adapter))
4597                 return;
4598
4599 #ifdef CONFIG_IXGBE_DCB
4600         if (ixgbe_cache_ring_dcb(adapter))
4601                 return;
4602 #endif
4603
4604 #ifdef IXGBE_FCOE
4605         if (ixgbe_cache_ring_fcoe(adapter))
4606                 return;
4607 #endif /* IXGBE_FCOE */
4608
4609         if (ixgbe_cache_ring_fdir(adapter))
4610                 return;
4611
4612         if (ixgbe_cache_ring_rss(adapter))
4613                 return;
4614 }
4615
4616 /**
4617  * ixgbe_alloc_queues - Allocate memory for all rings
4618  * @adapter: board private structure to initialize
4619  *
4620  * We allocate one ring per queue at run-time since we don't know the
4621  * number of queues at compile-time.  The polling_netdev array is
4622  * intended for Multiqueue, but should work fine with a single queue.
4623  **/
4624 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4625 {
4626         int rx = 0, tx = 0, nid = adapter->node;
4627
4628         if (nid < 0 || !node_online(nid))
4629                 nid = first_online_node;
4630
4631         for (; tx < adapter->num_tx_queues; tx++) {
4632                 struct ixgbe_ring *ring;
4633
4634                 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4635                 if (!ring)
4636                         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4637                 if (!ring)
4638                         goto err_allocation;
4639                 ring->count = adapter->tx_ring_count;
4640                 ring->queue_index = tx;
4641                 ring->numa_node = nid;
4642                 ring->dev = &adapter->pdev->dev;
4643                 ring->netdev = adapter->netdev;
4644
4645                 adapter->tx_ring[tx] = ring;
4646         }
4647
4648         for (; rx < adapter->num_rx_queues; rx++) {
4649                 struct ixgbe_ring *ring;
4650
4651                 ring = kzalloc_node(sizeof(*ring), GFP_KERNEL, nid);
4652                 if (!ring)
4653                         ring = kzalloc(sizeof(*ring), GFP_KERNEL);
4654                 if (!ring)
4655                         goto err_allocation;
4656                 ring->count = adapter->rx_ring_count;
4657                 ring->queue_index = rx;
4658                 ring->numa_node = nid;
4659                 ring->dev = &adapter->pdev->dev;
4660                 ring->netdev = adapter->netdev;
4661
4662                 adapter->rx_ring[rx] = ring;
4663         }
4664
4665         ixgbe_cache_ring_register(adapter);
4666
4667         return 0;
4668
4669 err_allocation:
4670         while (tx)
4671                 kfree(adapter->tx_ring[--tx]);
4672
4673         while (rx)
4674                 kfree(adapter->rx_ring[--rx]);
4675         return -ENOMEM;
4676 }
4677
4678 /**
4679  * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4680  * @adapter: board private structure to initialize
4681  *
4682  * Attempt to configure the interrupts using the best available
4683  * capabilities of the hardware and the kernel.
4684  **/
4685 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4686 {
4687         struct ixgbe_hw *hw = &adapter->hw;
4688         int err = 0;
4689         int vector, v_budget;
4690
4691         /*
4692          * It's easy to be greedy for MSI-X vectors, but it really
4693          * doesn't do us much good if we have a lot more vectors
4694          * than CPU's.  So let's be conservative and only ask for
4695          * (roughly) the same number of vectors as there are CPU's.
4696          */
4697         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4698                        (int)num_online_cpus()) + NON_Q_VECTORS;
4699
4700         /*
4701          * At the same time, hardware can only support a maximum of
4702          * hw.mac->max_msix_vectors vectors.  With features
4703          * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4704          * descriptor queues supported by our device.  Thus, we cap it off in
4705          * those rare cases where the cpu count also exceeds our vector limit.
4706          */
4707         v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4708
4709         /* A failure in MSI-X entry allocation isn't fatal, but it does
4710          * mean we disable MSI-X capabilities of the adapter. */
4711         adapter->msix_entries = kcalloc(v_budget,
4712                                         sizeof(struct msix_entry), GFP_KERNEL);
4713         if (adapter->msix_entries) {
4714                 for (vector = 0; vector < v_budget; vector++)
4715                         adapter->msix_entries[vector].entry = vector;
4716
4717                 ixgbe_acquire_msix_vectors(adapter, v_budget);
4718
4719                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4720                         goto out;
4721         }
4722
4723         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4724         adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4725         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
4726                 e_err(probe,
4727                       "ATR is not supported while multiple "
4728                       "queues are disabled.  Disabling Flow Director\n");
4729         }
4730         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4731         adapter->atr_sample_rate = 0;
4732         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4733                 ixgbe_disable_sriov(adapter);
4734
4735         err = ixgbe_set_num_queues(adapter);
4736         if (err)
4737                 return err;
4738
4739         err = pci_enable_msi(adapter->pdev);
4740         if (!err) {
4741                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4742         } else {
4743                 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4744                              "Unable to allocate MSI interrupt, "
4745                              "falling back to legacy.  Error: %d\n", err);
4746                 /* reset err */
4747                 err = 0;
4748         }
4749
4750 out:
4751         return err;
4752 }
4753
4754 /**
4755  * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4756  * @adapter: board private structure to initialize
4757  *
4758  * We allocate one q_vector per queue interrupt.  If allocation fails we
4759  * return -ENOMEM.
4760  **/
4761 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4762 {
4763         int v_idx, num_q_vectors;
4764         struct ixgbe_q_vector *q_vector;
4765
4766         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4767                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4768         else
4769                 num_q_vectors = 1;
4770
4771         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
4772                 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4773                                         GFP_KERNEL, adapter->node);
4774                 if (!q_vector)
4775                         q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4776                                            GFP_KERNEL);
4777                 if (!q_vector)
4778                         goto err_out;
4779
4780                 q_vector->adapter = adapter;
4781                 q_vector->v_idx = v_idx;
4782
4783                 /* Allocate the affinity_hint cpumask, configure the mask */
4784                 if (!alloc_cpumask_var(&q_vector->affinity_mask, GFP_KERNEL))
4785                         goto err_out;
4786                 cpumask_set_cpu(v_idx, q_vector->affinity_mask);
4787                 netif_napi_add(adapter->netdev, &q_vector->napi,
4788                                ixgbe_poll, 64);
4789                 adapter->q_vector[v_idx] = q_vector;
4790         }
4791
4792         return 0;
4793
4794 err_out:
4795         while (v_idx) {
4796                 v_idx--;
4797                 q_vector = adapter->q_vector[v_idx];
4798                 netif_napi_del(&q_vector->napi);
4799                 free_cpumask_var(q_vector->affinity_mask);
4800                 kfree(q_vector);
4801                 adapter->q_vector[v_idx] = NULL;
4802         }
4803         return -ENOMEM;
4804 }
4805
4806 /**
4807  * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4808  * @adapter: board private structure to initialize
4809  *
4810  * This function frees the memory allocated to the q_vectors.  In addition if
4811  * NAPI is enabled it will delete any references to the NAPI struct prior
4812  * to freeing the q_vector.
4813  **/
4814 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4815 {
4816         int v_idx, num_q_vectors;
4817
4818         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4819                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4820         else
4821                 num_q_vectors = 1;
4822
4823         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
4824                 struct ixgbe_q_vector *q_vector = adapter->q_vector[v_idx];
4825                 adapter->q_vector[v_idx] = NULL;
4826                 netif_napi_del(&q_vector->napi);
4827                 free_cpumask_var(q_vector->affinity_mask);
4828                 kfree(q_vector);
4829         }
4830 }
4831
4832 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4833 {
4834         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4835                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4836                 pci_disable_msix(adapter->pdev);
4837                 kfree(adapter->msix_entries);
4838                 adapter->msix_entries = NULL;
4839         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4840                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4841                 pci_disable_msi(adapter->pdev);
4842         }
4843 }
4844
4845 /**
4846  * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4847  * @adapter: board private structure to initialize
4848  *
4849  * We determine which interrupt scheme to use based on...
4850  * - Kernel support (MSI, MSI-X)
4851  *   - which can be user-defined (via MODULE_PARAM)
4852  * - Hardware queue count (num_*_queues)
4853  *   - defined by miscellaneous hardware support/features (RSS, etc.)
4854  **/
4855 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4856 {
4857         int err;
4858
4859         /* Number of supported queues */
4860         err = ixgbe_set_num_queues(adapter);
4861         if (err)
4862                 return err;
4863
4864         err = ixgbe_set_interrupt_capability(adapter);
4865         if (err) {
4866                 e_dev_err("Unable to setup interrupt capabilities\n");
4867                 goto err_set_interrupt;
4868         }
4869
4870         err = ixgbe_alloc_q_vectors(adapter);
4871         if (err) {
4872                 e_dev_err("Unable to allocate memory for queue vectors\n");
4873                 goto err_alloc_q_vectors;
4874         }
4875
4876         err = ixgbe_alloc_queues(adapter);
4877         if (err) {
4878                 e_dev_err("Unable to allocate memory for queues\n");
4879                 goto err_alloc_queues;
4880         }
4881
4882         e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4883                    (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4884                    adapter->num_rx_queues, adapter->num_tx_queues);
4885
4886         set_bit(__IXGBE_DOWN, &adapter->state);
4887
4888         return 0;
4889
4890 err_alloc_queues:
4891         ixgbe_free_q_vectors(adapter);
4892 err_alloc_q_vectors:
4893         ixgbe_reset_interrupt_capability(adapter);
4894 err_set_interrupt:
4895         return err;
4896 }
4897
4898 /**
4899  * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4900  * @adapter: board private structure to clear interrupt scheme on
4901  *
4902  * We go through and clear interrupt specific resources and reset the structure
4903  * to pre-load conditions
4904  **/
4905 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4906 {
4907         int i;
4908
4909         for (i = 0; i < adapter->num_tx_queues; i++) {
4910                 kfree(adapter->tx_ring[i]);
4911                 adapter->tx_ring[i] = NULL;
4912         }
4913         for (i = 0; i < adapter->num_rx_queues; i++) {
4914                 struct ixgbe_ring *ring = adapter->rx_ring[i];
4915
4916                 /* ixgbe_get_stats64() might access this ring, we must wait
4917                  * a grace period before freeing it.
4918                  */
4919                 kfree_rcu(ring, rcu);
4920                 adapter->rx_ring[i] = NULL;
4921         }
4922
4923         adapter->num_tx_queues = 0;
4924         adapter->num_rx_queues = 0;
4925
4926         ixgbe_free_q_vectors(adapter);
4927         ixgbe_reset_interrupt_capability(adapter);
4928 }
4929
4930 /**
4931  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4932  * @adapter: board private structure to initialize
4933  *
4934  * ixgbe_sw_init initializes the Adapter private data structure.
4935  * Fields are initialized based on PCI device information and
4936  * OS network device settings (MTU size).
4937  **/
4938 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4939 {
4940         struct ixgbe_hw *hw = &adapter->hw;
4941         struct pci_dev *pdev = adapter->pdev;
4942         unsigned int rss;
4943 #ifdef CONFIG_IXGBE_DCB
4944         int j;
4945         struct tc_configuration *tc;
4946 #endif
4947
4948         /* PCI config space info */
4949
4950         hw->vendor_id = pdev->vendor;
4951         hw->device_id = pdev->device;
4952         hw->revision_id = pdev->revision;
4953         hw->subsystem_vendor_id = pdev->subsystem_vendor;
4954         hw->subsystem_device_id = pdev->subsystem_device;
4955
4956         /* Set capability flags */
4957         rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4958         adapter->ring_feature[RING_F_RSS].indices = rss;
4959         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4960         switch (hw->mac.type) {
4961         case ixgbe_mac_82598EB:
4962                 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4963                         adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4964                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4965                 break;
4966         case ixgbe_mac_X540:
4967                 adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4968         case ixgbe_mac_82599EB:
4969                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4970                 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4971                 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4972                 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4973                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4974                 /* Flow Director hash filters enabled */
4975                 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4976                 adapter->atr_sample_rate = 20;
4977                 adapter->ring_feature[RING_F_FDIR].indices =
4978                                                          IXGBE_MAX_FDIR_INDICES;
4979                 adapter->fdir_pballoc = IXGBE_FDIR_PBALLOC_64K;
4980 #ifdef IXGBE_FCOE
4981                 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4982                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4983                 adapter->ring_feature[RING_F_FCOE].indices = 0;
4984 #ifdef CONFIG_IXGBE_DCB
4985                 /* Default traffic class to use for FCoE */
4986                 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4987 #endif
4988 #endif /* IXGBE_FCOE */
4989                 break;
4990         default:
4991                 break;
4992         }
4993
4994         /* n-tuple support exists, always init our spinlock */
4995         spin_lock_init(&adapter->fdir_perfect_lock);
4996
4997 #ifdef CONFIG_IXGBE_DCB
4998         switch (hw->mac.type) {
4999         case ixgbe_mac_X540:
5000                 adapter->dcb_cfg.num_tcs.pg_tcs = X540_TRAFFIC_CLASS;
5001                 adapter->dcb_cfg.num_tcs.pfc_tcs = X540_TRAFFIC_CLASS;
5002                 break;
5003         default:
5004                 adapter->dcb_cfg.num_tcs.pg_tcs = MAX_TRAFFIC_CLASS;
5005                 adapter->dcb_cfg.num_tcs.pfc_tcs = MAX_TRAFFIC_CLASS;
5006                 break;
5007         }
5008
5009         /* Configure DCB traffic classes */
5010         for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
5011                 tc = &adapter->dcb_cfg.tc_config[j];
5012                 tc->path[DCB_TX_CONFIG].bwg_id = 0;
5013                 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
5014                 tc->path[DCB_RX_CONFIG].bwg_id = 0;
5015                 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
5016                 tc->dcb_pfc = pfc_disabled;
5017         }
5018
5019         /* Initialize default user to priority mapping, UPx->TC0 */
5020         tc = &adapter->dcb_cfg.tc_config[0];
5021         tc->path[DCB_TX_CONFIG].up_to_tc_bitmap = 0xFF;
5022         tc->path[DCB_RX_CONFIG].up_to_tc_bitmap = 0xFF;
5023
5024         adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
5025         adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
5026         adapter->dcb_cfg.pfc_mode_enable = false;
5027         adapter->dcb_set_bitmap = 0x00;
5028         adapter->dcbx_cap = DCB_CAP_DCBX_HOST | DCB_CAP_DCBX_VER_CEE;
5029         ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
5030                            MAX_TRAFFIC_CLASS);
5031
5032 #endif
5033
5034         /* default flow control settings */
5035         hw->fc.requested_mode = ixgbe_fc_full;
5036         hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
5037 #ifdef CONFIG_DCB
5038         adapter->last_lfc_mode = hw->fc.current_mode;
5039 #endif
5040         ixgbe_pbthresh_setup(adapter);
5041         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
5042         hw->fc.send_xon = true;
5043         hw->fc.disable_fc_autoneg = false;
5044
5045         /* enable itr by default in dynamic mode */
5046         adapter->rx_itr_setting = 1;
5047         adapter->tx_itr_setting = 1;
5048
5049         /* set defaults for eitr in MegaBytes */
5050         adapter->eitr_low = 10;
5051         adapter->eitr_high = 20;
5052
5053         /* set default ring sizes */
5054         adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
5055         adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
5056
5057         /* set default work limits */
5058         adapter->tx_work_limit = IXGBE_DEFAULT_TX_WORK;
5059
5060         /* initialize eeprom parameters */
5061         if (ixgbe_init_eeprom_params_generic(hw)) {
5062                 e_dev_err("EEPROM initialization failed\n");
5063                 return -EIO;
5064         }
5065
5066         /* enable rx csum by default */
5067         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
5068
5069         /* get assigned NUMA node */
5070         adapter->node = dev_to_node(&pdev->dev);
5071
5072         set_bit(__IXGBE_DOWN, &adapter->state);
5073
5074         return 0;
5075 }
5076
5077 /**
5078  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
5079  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
5080  *
5081  * Return 0 on success, negative on failure
5082  **/
5083 int ixgbe_setup_tx_resources(struct ixgbe_ring *tx_ring)
5084 {
5085         struct device *dev = tx_ring->dev;
5086         int size;
5087
5088         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
5089         tx_ring->tx_buffer_info = vzalloc_node(size, tx_ring->numa_node);
5090         if (!tx_ring->tx_buffer_info)
5091                 tx_ring->tx_buffer_info = vzalloc(size);
5092         if (!tx_ring->tx_buffer_info)
5093                 goto err;
5094
5095         /* round up to nearest 4K */
5096         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
5097         tx_ring->size = ALIGN(tx_ring->size, 4096);
5098
5099         tx_ring->desc = dma_alloc_coherent(dev, tx_ring->size,
5100                                            &tx_ring->dma, GFP_KERNEL);
5101         if (!tx_ring->desc)
5102                 goto err;
5103
5104         tx_ring->next_to_use = 0;
5105         tx_ring->next_to_clean = 0;
5106         return 0;
5107
5108 err:
5109         vfree(tx_ring->tx_buffer_info);
5110         tx_ring->tx_buffer_info = NULL;
5111         dev_err(dev, "Unable to allocate memory for the Tx descriptor ring\n");
5112         return -ENOMEM;
5113 }
5114
5115 /**
5116  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
5117  * @adapter: board private structure
5118  *
5119  * If this function returns with an error, then it's possible one or
5120  * more of the rings is populated (while the rest are not).  It is the
5121  * callers duty to clean those orphaned rings.
5122  *
5123  * Return 0 on success, negative on failure
5124  **/
5125 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
5126 {
5127         int i, err = 0;
5128
5129         for (i = 0; i < adapter->num_tx_queues; i++) {
5130                 err = ixgbe_setup_tx_resources(adapter->tx_ring[i]);
5131                 if (!err)
5132                         continue;
5133                 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
5134                 break;
5135         }
5136
5137         return err;
5138 }
5139
5140 /**
5141  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
5142  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
5143  *
5144  * Returns 0 on success, negative on failure
5145  **/
5146 int ixgbe_setup_rx_resources(struct ixgbe_ring *rx_ring)
5147 {
5148         struct device *dev = rx_ring->dev;
5149         int size;
5150
5151         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
5152         rx_ring->rx_buffer_info = vzalloc_node(size, rx_ring->numa_node);
5153         if (!rx_ring->rx_buffer_info)
5154                 rx_ring->rx_buffer_info = vzalloc(size);
5155         if (!rx_ring->rx_buffer_info)
5156                 goto err;
5157
5158         /* Round up to nearest 4K */
5159         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
5160         rx_ring->size = ALIGN(rx_ring->size, 4096);
5161
5162         rx_ring->desc = dma_alloc_coherent(dev, rx_ring->size,
5163                                            &rx_ring->dma, GFP_KERNEL);
5164
5165         if (!rx_ring->desc)
5166                 goto err;
5167
5168         rx_ring->next_to_clean = 0;
5169         rx_ring->next_to_use = 0;
5170
5171         return 0;
5172 err:
5173         vfree(rx_ring->rx_buffer_info);
5174         rx_ring->rx_buffer_info = NULL;
5175         dev_err(dev, "Unable to allocate memory for the Rx descriptor ring\n");
5176         return -ENOMEM;
5177 }
5178
5179 /**
5180  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
5181  * @adapter: board private structure
5182  *
5183  * If this function returns with an error, then it's possible one or
5184  * more of the rings is populated (while the rest are not).  It is the
5185  * callers duty to clean those orphaned rings.
5186  *
5187  * Return 0 on success, negative on failure
5188  **/
5189 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
5190 {
5191         int i, err = 0;
5192
5193         for (i = 0; i < adapter->num_rx_queues; i++) {
5194                 err = ixgbe_setup_rx_resources(adapter->rx_ring[i]);
5195                 if (!err)
5196                         continue;
5197                 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
5198                 break;
5199         }
5200
5201         return err;
5202 }
5203
5204 /**
5205  * ixgbe_free_tx_resources - Free Tx Resources per Queue
5206  * @tx_ring: Tx descriptor ring for a specific queue
5207  *
5208  * Free all transmit software resources
5209  **/
5210 void ixgbe_free_tx_resources(struct ixgbe_ring *tx_ring)
5211 {
5212         ixgbe_clean_tx_ring(tx_ring);
5213
5214         vfree(tx_ring->tx_buffer_info);
5215         tx_ring->tx_buffer_info = NULL;
5216
5217         /* if not set, then don't free */
5218         if (!tx_ring->desc)
5219                 return;
5220
5221         dma_free_coherent(tx_ring->dev, tx_ring->size,
5222                           tx_ring->desc, tx_ring->dma);
5223
5224         tx_ring->desc = NULL;
5225 }
5226
5227 /**
5228  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5229  * @adapter: board private structure
5230  *
5231  * Free all transmit software resources
5232  **/
5233 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5234 {
5235         int i;
5236
5237         for (i = 0; i < adapter->num_tx_queues; i++)
5238                 if (adapter->tx_ring[i]->desc)
5239                         ixgbe_free_tx_resources(adapter->tx_ring[i]);
5240 }
5241
5242 /**
5243  * ixgbe_free_rx_resources - Free Rx Resources
5244  * @rx_ring: ring to clean the resources from
5245  *
5246  * Free all receive software resources
5247  **/
5248 void ixgbe_free_rx_resources(struct ixgbe_ring *rx_ring)
5249 {
5250         ixgbe_clean_rx_ring(rx_ring);
5251
5252         vfree(rx_ring->rx_buffer_info);
5253         rx_ring->rx_buffer_info = NULL;
5254
5255         /* if not set, then don't free */
5256         if (!rx_ring->desc)
5257                 return;
5258
5259         dma_free_coherent(rx_ring->dev, rx_ring->size,
5260                           rx_ring->desc, rx_ring->dma);
5261
5262         rx_ring->desc = NULL;
5263 }
5264
5265 /**
5266  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5267  * @adapter: board private structure
5268  *
5269  * Free all receive software resources
5270  **/
5271 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5272 {
5273         int i;
5274
5275         for (i = 0; i < adapter->num_rx_queues; i++)
5276                 if (adapter->rx_ring[i]->desc)
5277                         ixgbe_free_rx_resources(adapter->rx_ring[i]);
5278 }
5279
5280 /**
5281  * ixgbe_change_mtu - Change the Maximum Transfer Unit
5282  * @netdev: network interface device structure
5283  * @new_mtu: new value for maximum frame size
5284  *
5285  * Returns 0 on success, negative on failure
5286  **/
5287 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5288 {
5289         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5290         struct ixgbe_hw *hw = &adapter->hw;
5291         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5292
5293         /* MTU < 68 is an error and causes problems on some kernels */
5294         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED &&
5295             hw->mac.type != ixgbe_mac_X540) {
5296                 if ((new_mtu < 68) || (max_frame > MAXIMUM_ETHERNET_VLAN_SIZE))
5297                         return -EINVAL;
5298         } else {
5299                 if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5300                         return -EINVAL;
5301         }
5302
5303         e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5304         /* must set new MTU before calling down or up */
5305         netdev->mtu = new_mtu;
5306
5307         if (netif_running(netdev))
5308                 ixgbe_reinit_locked(adapter);
5309
5310         return 0;
5311 }
5312
5313 /**
5314  * ixgbe_open - Called when a network interface is made active
5315  * @netdev: network interface device structure
5316  *
5317  * Returns 0 on success, negative value on failure
5318  *
5319  * The open entry point is called when a network interface is made
5320  * active by the system (IFF_UP).  At this point all resources needed
5321  * for transmit and receive operations are allocated, the interrupt
5322  * handler is registered with the OS, the watchdog timer is started,
5323  * and the stack is notified that the interface is ready.
5324  **/
5325 static int ixgbe_open(struct net_device *netdev)
5326 {
5327         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5328         int err;
5329
5330         /* disallow open during test */
5331         if (test_bit(__IXGBE_TESTING, &adapter->state))
5332                 return -EBUSY;
5333
5334         netif_carrier_off(netdev);
5335
5336         /* allocate transmit descriptors */
5337         err = ixgbe_setup_all_tx_resources(adapter);
5338         if (err)
5339                 goto err_setup_tx;
5340
5341         /* allocate receive descriptors */
5342         err = ixgbe_setup_all_rx_resources(adapter);
5343         if (err)
5344                 goto err_setup_rx;
5345
5346         ixgbe_configure(adapter);
5347
5348         err = ixgbe_request_irq(adapter);
5349         if (err)
5350                 goto err_req_irq;
5351
5352         ixgbe_up_complete(adapter);
5353
5354         return 0;
5355
5356 err_req_irq:
5357 err_setup_rx:
5358         ixgbe_free_all_rx_resources(adapter);
5359 err_setup_tx:
5360         ixgbe_free_all_tx_resources(adapter);
5361         ixgbe_reset(adapter);
5362
5363         return err;
5364 }
5365
5366 /**
5367  * ixgbe_close - Disables a network interface
5368  * @netdev: network interface device structure
5369  *
5370  * Returns 0, this is not allowed to fail
5371  *
5372  * The close entry point is called when an interface is de-activated
5373  * by the OS.  The hardware is still under the drivers control, but
5374  * needs to be disabled.  A global MAC reset is issued to stop the
5375  * hardware, and all transmit and receive resources are freed.
5376  **/
5377 static int ixgbe_close(struct net_device *netdev)
5378 {
5379         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5380
5381         ixgbe_down(adapter);
5382         ixgbe_free_irq(adapter);
5383
5384         ixgbe_fdir_filter_exit(adapter);
5385
5386         ixgbe_free_all_tx_resources(adapter);
5387         ixgbe_free_all_rx_resources(adapter);
5388
5389         ixgbe_release_hw_control(adapter);
5390
5391         return 0;
5392 }
5393
5394 #ifdef CONFIG_PM
5395 static int ixgbe_resume(struct pci_dev *pdev)
5396 {
5397         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5398         struct net_device *netdev = adapter->netdev;
5399         u32 err;
5400
5401         pci_set_power_state(pdev, PCI_D0);
5402         pci_restore_state(pdev);
5403         /*
5404          * pci_restore_state clears dev->state_saved so call
5405          * pci_save_state to restore it.
5406          */
5407         pci_save_state(pdev);
5408
5409         err = pci_enable_device_mem(pdev);
5410         if (err) {
5411                 e_dev_err("Cannot enable PCI device from suspend\n");
5412                 return err;
5413         }
5414         pci_set_master(pdev);
5415
5416         pci_wake_from_d3(pdev, false);
5417
5418         err = ixgbe_init_interrupt_scheme(adapter);
5419         if (err) {
5420                 e_dev_err("Cannot initialize interrupts for device\n");
5421                 return err;
5422         }
5423
5424         ixgbe_reset(adapter);
5425
5426         IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5427
5428         if (netif_running(netdev)) {
5429                 err = ixgbe_open(netdev);
5430                 if (err)
5431                         return err;
5432         }
5433
5434         netif_device_attach(netdev);
5435
5436         return 0;
5437 }
5438 #endif /* CONFIG_PM */
5439
5440 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5441 {
5442         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
5443         struct net_device *netdev = adapter->netdev;
5444         struct ixgbe_hw *hw = &adapter->hw;
5445         u32 ctrl, fctrl;
5446         u32 wufc = adapter->wol;
5447 #ifdef CONFIG_PM
5448         int retval = 0;
5449 #endif
5450
5451         netif_device_detach(netdev);
5452
5453         if (netif_running(netdev)) {
5454                 ixgbe_down(adapter);
5455                 ixgbe_free_irq(adapter);
5456                 ixgbe_free_all_tx_resources(adapter);
5457                 ixgbe_free_all_rx_resources(adapter);
5458         }
5459
5460         ixgbe_clear_interrupt_scheme(adapter);
5461 #ifdef CONFIG_DCB
5462         kfree(adapter->ixgbe_ieee_pfc);
5463         kfree(adapter->ixgbe_ieee_ets);
5464 #endif
5465
5466 #ifdef CONFIG_PM
5467         retval = pci_save_state(pdev);
5468         if (retval)
5469                 return retval;
5470
5471 #endif
5472         if (wufc) {
5473                 ixgbe_set_rx_mode(netdev);
5474
5475                 /* turn on all-multi mode if wake on multicast is enabled */
5476                 if (wufc & IXGBE_WUFC_MC) {
5477                         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5478                         fctrl |= IXGBE_FCTRL_MPE;
5479                         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5480                 }
5481
5482                 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5483                 ctrl |= IXGBE_CTRL_GIO_DIS;
5484                 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5485
5486                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5487         } else {
5488                 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5489                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5490         }
5491
5492         switch (hw->mac.type) {
5493         case ixgbe_mac_82598EB:
5494                 pci_wake_from_d3(pdev, false);
5495                 break;
5496         case ixgbe_mac_82599EB:
5497         case ixgbe_mac_X540:
5498                 pci_wake_from_d3(pdev, !!wufc);
5499                 break;
5500         default:
5501                 break;
5502         }
5503
5504         *enable_wake = !!wufc;
5505
5506         ixgbe_release_hw_control(adapter);
5507
5508         pci_disable_device(pdev);
5509
5510         return 0;
5511 }
5512
5513 #ifdef CONFIG_PM
5514 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5515 {
5516         int retval;
5517         bool wake;
5518
5519         retval = __ixgbe_shutdown(pdev, &wake);
5520         if (retval)
5521                 return retval;
5522
5523         if (wake) {
5524                 pci_prepare_to_sleep(pdev);
5525         } else {
5526                 pci_wake_from_d3(pdev, false);
5527                 pci_set_power_state(pdev, PCI_D3hot);
5528         }
5529
5530         return 0;
5531 }
5532 #endif /* CONFIG_PM */
5533
5534 static void ixgbe_shutdown(struct pci_dev *pdev)
5535 {
5536         bool wake;
5537
5538         __ixgbe_shutdown(pdev, &wake);
5539
5540         if (system_state == SYSTEM_POWER_OFF) {
5541                 pci_wake_from_d3(pdev, wake);
5542                 pci_set_power_state(pdev, PCI_D3hot);
5543         }
5544 }
5545
5546 /**
5547  * ixgbe_update_stats - Update the board statistics counters.
5548  * @adapter: board private structure
5549  **/
5550 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5551 {
5552         struct net_device *netdev = adapter->netdev;
5553         struct ixgbe_hw *hw = &adapter->hw;
5554         struct ixgbe_hw_stats *hwstats = &adapter->stats;
5555         u64 total_mpc = 0;
5556         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5557         u64 non_eop_descs = 0, restart_queue = 0, tx_busy = 0;
5558         u64 alloc_rx_page_failed = 0, alloc_rx_buff_failed = 0;
5559         u64 bytes = 0, packets = 0;
5560 #ifdef IXGBE_FCOE
5561         struct ixgbe_fcoe *fcoe = &adapter->fcoe;
5562         unsigned int cpu;
5563         u64 fcoe_noddp_counts_sum = 0, fcoe_noddp_ext_buff_counts_sum = 0;
5564 #endif /* IXGBE_FCOE */
5565
5566         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5567             test_bit(__IXGBE_RESETTING, &adapter->state))
5568                 return;
5569
5570         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5571                 u64 rsc_count = 0;
5572                 u64 rsc_flush = 0;
5573                 for (i = 0; i < 16; i++)
5574                         adapter->hw_rx_no_dma_resources +=
5575                                 IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5576                 for (i = 0; i < adapter->num_rx_queues; i++) {
5577                         rsc_count += adapter->rx_ring[i]->rx_stats.rsc_count;
5578                         rsc_flush += adapter->rx_ring[i]->rx_stats.rsc_flush;
5579                 }
5580                 adapter->rsc_total_count = rsc_count;
5581                 adapter->rsc_total_flush = rsc_flush;
5582         }
5583
5584         for (i = 0; i < adapter->num_rx_queues; i++) {
5585                 struct ixgbe_ring *rx_ring = adapter->rx_ring[i];
5586                 non_eop_descs += rx_ring->rx_stats.non_eop_descs;
5587                 alloc_rx_page_failed += rx_ring->rx_stats.alloc_rx_page_failed;
5588                 alloc_rx_buff_failed += rx_ring->rx_stats.alloc_rx_buff_failed;
5589                 bytes += rx_ring->stats.bytes;
5590                 packets += rx_ring->stats.packets;
5591         }
5592         adapter->non_eop_descs = non_eop_descs;
5593         adapter->alloc_rx_page_failed = alloc_rx_page_failed;
5594         adapter->alloc_rx_buff_failed = alloc_rx_buff_failed;
5595         netdev->stats.rx_bytes = bytes;
5596         netdev->stats.rx_packets = packets;
5597
5598         bytes = 0;
5599         packets = 0;
5600         /* gather some stats to the adapter struct that are per queue */
5601         for (i = 0; i < adapter->num_tx_queues; i++) {
5602                 struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5603                 restart_queue += tx_ring->tx_stats.restart_queue;
5604                 tx_busy += tx_ring->tx_stats.tx_busy;
5605                 bytes += tx_ring->stats.bytes;
5606                 packets += tx_ring->stats.packets;
5607         }
5608         adapter->restart_queue = restart_queue;
5609         adapter->tx_busy = tx_busy;
5610         netdev->stats.tx_bytes = bytes;
5611         netdev->stats.tx_packets = packets;
5612
5613         hwstats->crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5614
5615         /* 8 register reads */
5616         for (i = 0; i < 8; i++) {
5617                 /* for packet buffers not used, the register should read 0 */
5618                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5619                 missed_rx += mpc;
5620                 hwstats->mpc[i] += mpc;
5621                 total_mpc += hwstats->mpc[i];
5622                 hwstats->pxontxc[i] += IXGBE_READ_REG(hw, IXGBE_PXONTXC(i));
5623                 hwstats->pxofftxc[i] += IXGBE_READ_REG(hw, IXGBE_PXOFFTXC(i));
5624                 switch (hw->mac.type) {
5625                 case ixgbe_mac_82598EB:
5626                         hwstats->rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5627                         hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5628                         hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5629                         hwstats->pxonrxc[i] +=
5630                                 IXGBE_READ_REG(hw, IXGBE_PXONRXC(i));
5631                         break;
5632                 case ixgbe_mac_82599EB:
5633                 case ixgbe_mac_X540:
5634                         hwstats->pxonrxc[i] +=
5635                                 IXGBE_READ_REG(hw, IXGBE_PXONRXCNT(i));
5636                         break;
5637                 default:
5638                         break;
5639                 }
5640         }
5641
5642         /*16 register reads */
5643         for (i = 0; i < 16; i++) {
5644                 hwstats->qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5645                 hwstats->qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5646                 if ((hw->mac.type == ixgbe_mac_82599EB) ||
5647                     (hw->mac.type == ixgbe_mac_X540)) {
5648                         hwstats->qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC_L(i));
5649                         IXGBE_READ_REG(hw, IXGBE_QBTC_H(i)); /* to clear */
5650                         hwstats->qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC_L(i));
5651                         IXGBE_READ_REG(hw, IXGBE_QBRC_H(i)); /* to clear */
5652                 }
5653         }
5654
5655         hwstats->gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5656         /* work around hardware counting issue */
5657         hwstats->gprc -= missed_rx;
5658
5659         ixgbe_update_xoff_received(adapter);
5660
5661         /* 82598 hardware only has a 32 bit counter in the high register */
5662         switch (hw->mac.type) {
5663         case ixgbe_mac_82598EB:
5664                 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5665                 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5666                 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5667                 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5668                 break;
5669         case ixgbe_mac_X540:
5670                 /* OS2BMC stats are X540 only*/
5671                 hwstats->o2bgptc += IXGBE_READ_REG(hw, IXGBE_O2BGPTC);
5672                 hwstats->o2bspc += IXGBE_READ_REG(hw, IXGBE_O2BSPC);
5673                 hwstats->b2ospc += IXGBE_READ_REG(hw, IXGBE_B2OSPC);
5674                 hwstats->b2ogprc += IXGBE_READ_REG(hw, IXGBE_B2OGPRC);
5675         case ixgbe_mac_82599EB:
5676                 hwstats->gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5677                 IXGBE_READ_REG(hw, IXGBE_GORCH); /* to clear */
5678                 hwstats->gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5679                 IXGBE_READ_REG(hw, IXGBE_GOTCH); /* to clear */
5680                 hwstats->tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5681                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5682                 hwstats->lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5683                 hwstats->fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5684                 hwstats->fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5685 #ifdef IXGBE_FCOE
5686                 hwstats->fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5687                 hwstats->fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5688                 hwstats->fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5689                 hwstats->fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5690                 hwstats->fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5691                 hwstats->fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5692                 /* Add up per cpu counters for total ddp aloc fail */
5693                 if (fcoe->pcpu_noddp && fcoe->pcpu_noddp_ext_buff) {
5694                         for_each_possible_cpu(cpu) {
5695                                 fcoe_noddp_counts_sum +=
5696                                         *per_cpu_ptr(fcoe->pcpu_noddp, cpu);
5697                                 fcoe_noddp_ext_buff_counts_sum +=
5698                                         *per_cpu_ptr(fcoe->
5699                                                 pcpu_noddp_ext_buff, cpu);
5700                         }
5701                 }
5702                 hwstats->fcoe_noddp = fcoe_noddp_counts_sum;
5703                 hwstats->fcoe_noddp_ext_buff = fcoe_noddp_ext_buff_counts_sum;
5704 #endif /* IXGBE_FCOE */
5705                 break;
5706         default:
5707                 break;
5708         }
5709         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5710         hwstats->bprc += bprc;
5711         hwstats->mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5712         if (hw->mac.type == ixgbe_mac_82598EB)
5713                 hwstats->mprc -= bprc;
5714         hwstats->roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5715         hwstats->prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5716         hwstats->prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5717         hwstats->prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5718         hwstats->prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5719         hwstats->prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5720         hwstats->prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5721         hwstats->rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5722         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5723         hwstats->lxontxc += lxon;
5724         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5725         hwstats->lxofftxc += lxoff;
5726         hwstats->gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5727         hwstats->mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5728         /*
5729          * 82598 errata - tx of flow control packets is included in tx counters
5730          */
5731         xon_off_tot = lxon + lxoff;
5732         hwstats->gptc -= xon_off_tot;
5733         hwstats->mptc -= xon_off_tot;
5734         hwstats->gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5735         hwstats->ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5736         hwstats->rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5737         hwstats->rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5738         hwstats->tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5739         hwstats->ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5740         hwstats->ptc64 -= xon_off_tot;
5741         hwstats->ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5742         hwstats->ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5743         hwstats->ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5744         hwstats->ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5745         hwstats->ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5746         hwstats->bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5747
5748         /* Fill out the OS statistics structure */
5749         netdev->stats.multicast = hwstats->mprc;
5750
5751         /* Rx Errors */
5752         netdev->stats.rx_errors = hwstats->crcerrs + hwstats->rlec;
5753         netdev->stats.rx_dropped = 0;
5754         netdev->stats.rx_length_errors = hwstats->rlec;
5755         netdev->stats.rx_crc_errors = hwstats->crcerrs;
5756         netdev->stats.rx_missed_errors = total_mpc;
5757 }
5758
5759 /**
5760  * ixgbe_fdir_reinit_subtask - worker thread to reinit FDIR filter table
5761  * @adapter - pointer to the device adapter structure
5762  **/
5763 static void ixgbe_fdir_reinit_subtask(struct ixgbe_adapter *adapter)
5764 {
5765         struct ixgbe_hw *hw = &adapter->hw;
5766         int i;
5767
5768         if (!(adapter->flags2 & IXGBE_FLAG2_FDIR_REQUIRES_REINIT))
5769                 return;
5770
5771         adapter->flags2 &= ~IXGBE_FLAG2_FDIR_REQUIRES_REINIT;
5772
5773         /* if interface is down do nothing */
5774         if (test_bit(__IXGBE_DOWN, &adapter->state))
5775                 return;
5776
5777         /* do nothing if we are not using signature filters */
5778         if (!(adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE))
5779                 return;
5780
5781         adapter->fdir_overflow++;
5782
5783         if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5784                 for (i = 0; i < adapter->num_tx_queues; i++)
5785                         set_bit(__IXGBE_TX_FDIR_INIT_DONE,
5786                                 &(adapter->tx_ring[i]->state));
5787                 /* re-enable flow director interrupts */
5788                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_FLOW_DIR);
5789         } else {
5790                 e_err(probe, "failed to finish FDIR re-initialization, "
5791                       "ignored adding FDIR ATR filters\n");
5792         }
5793 }
5794
5795 /**
5796  * ixgbe_check_hang_subtask - check for hung queues and dropped interrupts
5797  * @adapter - pointer to the device adapter structure
5798  *
5799  * This function serves two purposes.  First it strobes the interrupt lines
5800  * in order to make certain interrupts are occuring.  Secondly it sets the
5801  * bits needed to check for TX hangs.  As a result we should immediately
5802  * determine if a hang has occured.
5803  */
5804 static void ixgbe_check_hang_subtask(struct ixgbe_adapter *adapter)
5805 {
5806         struct ixgbe_hw *hw = &adapter->hw;
5807         u64 eics = 0;
5808         int i;
5809
5810         /* If we're down or resetting, just bail */
5811         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5812             test_bit(__IXGBE_RESETTING, &adapter->state))
5813                 return;
5814
5815         /* Force detection of hung controller */
5816         if (netif_carrier_ok(adapter->netdev)) {
5817                 for (i = 0; i < adapter->num_tx_queues; i++)
5818                         set_check_for_tx_hang(adapter->tx_ring[i]);
5819         }
5820
5821         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5822                 /*
5823                  * for legacy and MSI interrupts don't set any bits
5824                  * that are enabled for EIAM, because this operation
5825                  * would set *both* EIMS and EICS for any bit in EIAM
5826                  */
5827                 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5828                         (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5829         } else {
5830                 /* get one bit for every active tx/rx interrupt vector */
5831                 for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5832                         struct ixgbe_q_vector *qv = adapter->q_vector[i];
5833                         if (qv->rx.ring || qv->tx.ring)
5834                                 eics |= ((u64)1 << i);
5835                 }
5836         }
5837
5838         /* Cause software interrupt to ensure rings are cleaned */
5839         ixgbe_irq_rearm_queues(adapter, eics);
5840
5841 }
5842
5843 /**
5844  * ixgbe_watchdog_update_link - update the link status
5845  * @adapter - pointer to the device adapter structure
5846  * @link_speed - pointer to a u32 to store the link_speed
5847  **/
5848 static void ixgbe_watchdog_update_link(struct ixgbe_adapter *adapter)
5849 {
5850         struct ixgbe_hw *hw = &adapter->hw;
5851         u32 link_speed = adapter->link_speed;
5852         bool link_up = adapter->link_up;
5853         int i;
5854
5855         if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE))
5856                 return;
5857
5858         if (hw->mac.ops.check_link) {
5859                 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5860         } else {
5861                 /* always assume link is up, if no check link function */
5862                 link_speed = IXGBE_LINK_SPEED_10GB_FULL;
5863                 link_up = true;
5864         }
5865         if (link_up) {
5866                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5867                         for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5868                                 hw->mac.ops.fc_enable(hw, i);
5869                 } else {
5870                         hw->mac.ops.fc_enable(hw, 0);
5871                 }
5872         }
5873
5874         if (link_up ||
5875             time_after(jiffies, (adapter->link_check_timeout +
5876                                  IXGBE_TRY_LINK_TIMEOUT))) {
5877                 adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5878                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5879                 IXGBE_WRITE_FLUSH(hw);
5880         }
5881
5882         adapter->link_up = link_up;
5883         adapter->link_speed = link_speed;
5884 }
5885
5886 /**
5887  * ixgbe_watchdog_link_is_up - update netif_carrier status and
5888  *                             print link up message
5889  * @adapter - pointer to the device adapter structure
5890  **/
5891 static void ixgbe_watchdog_link_is_up(struct ixgbe_adapter *adapter)
5892 {
5893         struct net_device *netdev = adapter->netdev;
5894         struct ixgbe_hw *hw = &adapter->hw;
5895         u32 link_speed = adapter->link_speed;
5896         bool flow_rx, flow_tx;
5897
5898         /* only continue if link was previously down */
5899         if (netif_carrier_ok(netdev))
5900                 return;
5901
5902         adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
5903
5904         switch (hw->mac.type) {
5905         case ixgbe_mac_82598EB: {
5906                 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5907                 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5908                 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5909                 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5910         }
5911                 break;
5912         case ixgbe_mac_X540:
5913         case ixgbe_mac_82599EB: {
5914                 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5915                 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5916                 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5917                 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5918         }
5919                 break;
5920         default:
5921                 flow_tx = false;
5922                 flow_rx = false;
5923                 break;
5924         }
5925         e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5926                (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5927                "10 Gbps" :
5928                (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5929                "1 Gbps" :
5930                (link_speed == IXGBE_LINK_SPEED_100_FULL ?
5931                "100 Mbps" :
5932                "unknown speed"))),
5933                ((flow_rx && flow_tx) ? "RX/TX" :
5934                (flow_rx ? "RX" :
5935                (flow_tx ? "TX" : "None"))));
5936
5937         netif_carrier_on(netdev);
5938         ixgbe_check_vf_rate_limit(adapter);
5939 }
5940
5941 /**
5942  * ixgbe_watchdog_link_is_down - update netif_carrier status and
5943  *                               print link down message
5944  * @adapter - pointer to the adapter structure
5945  **/
5946 static void ixgbe_watchdog_link_is_down(struct ixgbe_adapter* adapter)
5947 {
5948         struct net_device *netdev = adapter->netdev;
5949         struct ixgbe_hw *hw = &adapter->hw;
5950
5951         adapter->link_up = false;
5952         adapter->link_speed = 0;
5953
5954         /* only continue if link was up previously */
5955         if (!netif_carrier_ok(netdev))
5956                 return;
5957
5958         /* poll for SFP+ cable when link is down */
5959         if (ixgbe_is_sfp(hw) && hw->mac.type == ixgbe_mac_82598EB)
5960                 adapter->flags2 |= IXGBE_FLAG2_SEARCH_FOR_SFP;
5961
5962         e_info(drv, "NIC Link is Down\n");
5963         netif_carrier_off(netdev);
5964 }
5965
5966 /**
5967  * ixgbe_watchdog_flush_tx - flush queues on link down
5968  * @adapter - pointer to the device adapter structure
5969  **/
5970 static void ixgbe_watchdog_flush_tx(struct ixgbe_adapter *adapter)
5971 {
5972         int i;
5973         int some_tx_pending = 0;
5974
5975         if (!netif_carrier_ok(adapter->netdev)) {
5976                 for (i = 0; i < adapter->num_tx_queues; i++) {
5977                         struct ixgbe_ring *tx_ring = adapter->tx_ring[i];
5978                         if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5979                                 some_tx_pending = 1;
5980                                 break;
5981                         }
5982                 }
5983
5984                 if (some_tx_pending) {
5985                         /* We've lost link, so the controller stops DMA,
5986                          * but we've got queued Tx work that's never going
5987                          * to get done, so reset controller to flush Tx.
5988                          * (Do the reset outside of interrupt context).
5989                          */
5990                         adapter->flags2 |= IXGBE_FLAG2_RESET_REQUESTED;
5991                 }
5992         }
5993 }
5994
5995 static void ixgbe_spoof_check(struct ixgbe_adapter *adapter)
5996 {
5997         u32 ssvpc;
5998
5999         /* Do not perform spoof check for 82598 */
6000         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
6001                 return;
6002
6003         ssvpc = IXGBE_READ_REG(&adapter->hw, IXGBE_SSVPC);
6004
6005         /*
6006          * ssvpc register is cleared on read, if zero then no
6007          * spoofed packets in the last interval.
6008          */
6009         if (!ssvpc)
6010                 return;
6011
6012         e_warn(drv, "%d Spoofed packets detected\n", ssvpc);
6013 }
6014
6015 /**
6016  * ixgbe_watchdog_subtask - check and bring link up
6017  * @adapter - pointer to the device adapter structure
6018  **/
6019 static void ixgbe_watchdog_subtask(struct ixgbe_adapter *adapter)
6020 {
6021         /* if interface is down do nothing */
6022         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6023             test_bit(__IXGBE_RESETTING, &adapter->state))
6024                 return;
6025
6026         ixgbe_watchdog_update_link(adapter);
6027
6028         if (adapter->link_up)
6029                 ixgbe_watchdog_link_is_up(adapter);
6030         else
6031                 ixgbe_watchdog_link_is_down(adapter);
6032
6033         ixgbe_spoof_check(adapter);
6034         ixgbe_update_stats(adapter);
6035
6036         ixgbe_watchdog_flush_tx(adapter);
6037 }
6038
6039 /**
6040  * ixgbe_sfp_detection_subtask - poll for SFP+ cable
6041  * @adapter - the ixgbe adapter structure
6042  **/
6043 static void ixgbe_sfp_detection_subtask(struct ixgbe_adapter *adapter)
6044 {
6045         struct ixgbe_hw *hw = &adapter->hw;
6046         s32 err;
6047
6048         /* not searching for SFP so there is nothing to do here */
6049         if (!(adapter->flags2 & IXGBE_FLAG2_SEARCH_FOR_SFP) &&
6050             !(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6051                 return;
6052
6053         /* someone else is in init, wait until next service event */
6054         if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6055                 return;
6056
6057         err = hw->phy.ops.identify_sfp(hw);
6058         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6059                 goto sfp_out;
6060
6061         if (err == IXGBE_ERR_SFP_NOT_PRESENT) {
6062                 /* If no cable is present, then we need to reset
6063                  * the next time we find a good cable. */
6064                 adapter->flags2 |= IXGBE_FLAG2_SFP_NEEDS_RESET;
6065         }
6066
6067         /* exit on error */
6068         if (err)
6069                 goto sfp_out;
6070
6071         /* exit if reset not needed */
6072         if (!(adapter->flags2 & IXGBE_FLAG2_SFP_NEEDS_RESET))
6073                 goto sfp_out;
6074
6075         adapter->flags2 &= ~IXGBE_FLAG2_SFP_NEEDS_RESET;
6076
6077         /*
6078          * A module may be identified correctly, but the EEPROM may not have
6079          * support for that module.  setup_sfp() will fail in that case, so
6080          * we should not allow that module to load.
6081          */
6082         if (hw->mac.type == ixgbe_mac_82598EB)
6083                 err = hw->phy.ops.reset(hw);
6084         else
6085                 err = hw->mac.ops.setup_sfp(hw);
6086
6087         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED)
6088                 goto sfp_out;
6089
6090         adapter->flags |= IXGBE_FLAG_NEED_LINK_CONFIG;
6091         e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
6092
6093 sfp_out:
6094         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6095
6096         if ((err == IXGBE_ERR_SFP_NOT_SUPPORTED) &&
6097             (adapter->netdev->reg_state == NETREG_REGISTERED)) {
6098                 e_dev_err("failed to initialize because an unsupported "
6099                           "SFP+ module type was detected.\n");
6100                 e_dev_err("Reload the driver after installing a "
6101                           "supported module.\n");
6102                 unregister_netdev(adapter->netdev);
6103         }
6104 }
6105
6106 /**
6107  * ixgbe_sfp_link_config_subtask - set up link SFP after module install
6108  * @adapter - the ixgbe adapter structure
6109  **/
6110 static void ixgbe_sfp_link_config_subtask(struct ixgbe_adapter *adapter)
6111 {
6112         struct ixgbe_hw *hw = &adapter->hw;
6113         u32 autoneg;
6114         bool negotiation;
6115
6116         if (!(adapter->flags & IXGBE_FLAG_NEED_LINK_CONFIG))
6117                 return;
6118
6119         /* someone else is in init, wait until next service event */
6120         if (test_and_set_bit(__IXGBE_IN_SFP_INIT, &adapter->state))
6121                 return;
6122
6123         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_CONFIG;
6124
6125         autoneg = hw->phy.autoneg_advertised;
6126         if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
6127                 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
6128         hw->mac.autotry_restart = false;
6129         if (hw->mac.ops.setup_link)
6130                 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
6131
6132         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
6133         adapter->link_check_timeout = jiffies;
6134         clear_bit(__IXGBE_IN_SFP_INIT, &adapter->state);
6135 }
6136
6137 #ifdef CONFIG_PCI_IOV
6138 static void ixgbe_check_for_bad_vf(struct ixgbe_adapter *adapter)
6139 {
6140         int vf;
6141         struct ixgbe_hw *hw = &adapter->hw;
6142         struct net_device *netdev = adapter->netdev;
6143         u32 gpc;
6144         u32 ciaa, ciad;
6145
6146         gpc = IXGBE_READ_REG(hw, IXGBE_TXDGPC);
6147         if (gpc) /* If incrementing then no need for the check below */
6148                 return;
6149         /*
6150          * Check to see if a bad DMA write target from an errant or
6151          * malicious VF has caused a PCIe error.  If so then we can
6152          * issue a VFLR to the offending VF(s) and then resume without
6153          * requesting a full slot reset.
6154          */
6155
6156         for (vf = 0; vf < adapter->num_vfs; vf++) {
6157                 ciaa = (vf << 16) | 0x80000000;
6158                 /* 32 bit read so align, we really want status at offset 6 */
6159                 ciaa |= PCI_COMMAND;
6160                 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6161                 ciad = IXGBE_READ_REG(hw, IXGBE_CIAD_82599);
6162                 ciaa &= 0x7FFFFFFF;
6163                 /* disable debug mode asap after reading data */
6164                 IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6165                 /* Get the upper 16 bits which will be the PCI status reg */
6166                 ciad >>= 16;
6167                 if (ciad & PCI_STATUS_REC_MASTER_ABORT) {
6168                         netdev_err(netdev, "VF %d Hung DMA\n", vf);
6169                         /* Issue VFLR */
6170                         ciaa = (vf << 16) | 0x80000000;
6171                         ciaa |= 0xA8;
6172                         IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6173                         ciad = 0x00008000;  /* VFLR */
6174                         IXGBE_WRITE_REG(hw, IXGBE_CIAD_82599, ciad);
6175                         ciaa &= 0x7FFFFFFF;
6176                         IXGBE_WRITE_REG(hw, IXGBE_CIAA_82599, ciaa);
6177                 }
6178         }
6179 }
6180
6181 #endif
6182 /**
6183  * ixgbe_service_timer - Timer Call-back
6184  * @data: pointer to adapter cast into an unsigned long
6185  **/
6186 static void ixgbe_service_timer(unsigned long data)
6187 {
6188         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
6189         unsigned long next_event_offset;
6190         bool ready = true;
6191
6192 #ifdef CONFIG_PCI_IOV
6193         ready = false;
6194
6195         /*
6196          * don't bother with SR-IOV VF DMA hang check if there are
6197          * no VFs or the link is down
6198          */
6199         if (!adapter->num_vfs ||
6200             (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)) {
6201                 ready = true;
6202                 goto normal_timer_service;
6203         }
6204
6205         /* If we have VFs allocated then we must check for DMA hangs */
6206         ixgbe_check_for_bad_vf(adapter);
6207         next_event_offset = HZ / 50;
6208         adapter->timer_event_accumulator++;
6209
6210         if (adapter->timer_event_accumulator >= 100) {
6211                 ready = true;
6212                 adapter->timer_event_accumulator = 0;
6213         }
6214
6215         goto schedule_event;
6216
6217 normal_timer_service:
6218 #endif
6219         /* poll faster when waiting for link */
6220         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE)
6221                 next_event_offset = HZ / 10;
6222         else
6223                 next_event_offset = HZ * 2;
6224
6225 #ifdef CONFIG_PCI_IOV
6226 schedule_event:
6227 #endif
6228         /* Reset the timer */
6229         mod_timer(&adapter->service_timer, next_event_offset + jiffies);
6230
6231         if (ready)
6232                 ixgbe_service_event_schedule(adapter);
6233 }
6234
6235 static void ixgbe_reset_subtask(struct ixgbe_adapter *adapter)
6236 {
6237         if (!(adapter->flags2 & IXGBE_FLAG2_RESET_REQUESTED))
6238                 return;
6239
6240         adapter->flags2 &= ~IXGBE_FLAG2_RESET_REQUESTED;
6241
6242         /* If we're already down or resetting, just bail */
6243         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
6244             test_bit(__IXGBE_RESETTING, &adapter->state))
6245                 return;
6246
6247         ixgbe_dump(adapter);
6248         netdev_err(adapter->netdev, "Reset adapter\n");
6249         adapter->tx_timeout_count++;
6250
6251         ixgbe_reinit_locked(adapter);
6252 }
6253
6254 /**
6255  * ixgbe_service_task - manages and runs subtasks
6256  * @work: pointer to work_struct containing our data
6257  **/
6258 static void ixgbe_service_task(struct work_struct *work)
6259 {
6260         struct ixgbe_adapter *adapter = container_of(work,
6261                                                      struct ixgbe_adapter,
6262                                                      service_task);
6263
6264         ixgbe_reset_subtask(adapter);
6265         ixgbe_sfp_detection_subtask(adapter);
6266         ixgbe_sfp_link_config_subtask(adapter);
6267         ixgbe_check_overtemp_subtask(adapter);
6268         ixgbe_watchdog_subtask(adapter);
6269         ixgbe_fdir_reinit_subtask(adapter);
6270         ixgbe_check_hang_subtask(adapter);
6271
6272         ixgbe_service_event_complete(adapter);
6273 }
6274
6275 void ixgbe_tx_ctxtdesc(struct ixgbe_ring *tx_ring, u32 vlan_macip_lens,
6276                        u32 fcoe_sof_eof, u32 type_tucmd, u32 mss_l4len_idx)
6277 {
6278         struct ixgbe_adv_tx_context_desc *context_desc;
6279         u16 i = tx_ring->next_to_use;
6280
6281         context_desc = IXGBE_TX_CTXTDESC_ADV(tx_ring, i);
6282
6283         i++;
6284         tx_ring->next_to_use = (i < tx_ring->count) ? i : 0;
6285
6286         /* set bits to identify this as an advanced context descriptor */
6287         type_tucmd |= IXGBE_TXD_CMD_DEXT | IXGBE_ADVTXD_DTYP_CTXT;
6288
6289         context_desc->vlan_macip_lens   = cpu_to_le32(vlan_macip_lens);
6290         context_desc->seqnum_seed       = cpu_to_le32(fcoe_sof_eof);
6291         context_desc->type_tucmd_mlhl   = cpu_to_le32(type_tucmd);
6292         context_desc->mss_l4len_idx     = cpu_to_le32(mss_l4len_idx);
6293 }
6294
6295 static int ixgbe_tso(struct ixgbe_ring *tx_ring, struct sk_buff *skb,
6296                      u32 tx_flags, __be16 protocol, u8 *hdr_len)
6297 {
6298         int err;
6299         u32 vlan_macip_lens, type_tucmd;
6300         u32 mss_l4len_idx, l4len;
6301
6302         if (!skb_is_gso(skb))
6303                 return 0;
6304
6305         if (skb_header_cloned(skb)) {
6306                 err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
6307                 if (err)
6308                         return err;
6309         }
6310
6311         /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
6312         type_tucmd = IXGBE_ADVTXD_TUCMD_L4T_TCP;
6313
6314         if (protocol == __constant_htons(ETH_P_IP)) {
6315                 struct iphdr *iph = ip_hdr(skb);
6316                 iph->tot_len = 0;
6317                 iph->check = 0;
6318                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
6319                                                          iph->daddr, 0,
6320                                                          IPPROTO_TCP,
6321                                                          0);
6322                 type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6323         } else if (skb_is_gso_v6(skb)) {
6324                 ipv6_hdr(skb)->payload_len = 0;
6325                 tcp_hdr(skb)->check =
6326                     ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
6327                                      &ipv6_hdr(skb)->daddr,
6328                                      0, IPPROTO_TCP, 0);
6329         }
6330
6331         l4len = tcp_hdrlen(skb);
6332         *hdr_len = skb_transport_offset(skb) + l4len;
6333
6334         /* mss_l4len_id: use 1 as index for TSO */
6335         mss_l4len_idx = l4len << IXGBE_ADVTXD_L4LEN_SHIFT;
6336         mss_l4len_idx |= skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT;
6337         mss_l4len_idx |= 1 << IXGBE_ADVTXD_IDX_SHIFT;
6338
6339         /* vlan_macip_lens: HEADLEN, MACLEN, VLAN tag */
6340         vlan_macip_lens = skb_network_header_len(skb);
6341         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6342         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6343
6344         ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0, type_tucmd,
6345                           mss_l4len_idx);
6346
6347         return 1;
6348 }
6349
6350 static bool ixgbe_tx_csum(struct ixgbe_ring *tx_ring,
6351                           struct sk_buff *skb, u32 tx_flags,
6352                           __be16 protocol)
6353 {
6354         u32 vlan_macip_lens = 0;
6355         u32 mss_l4len_idx = 0;
6356         u32 type_tucmd = 0;
6357
6358         if (skb->ip_summed != CHECKSUM_PARTIAL) {
6359             if (!(tx_flags & IXGBE_TX_FLAGS_HW_VLAN) &&
6360                 !(tx_flags & IXGBE_TX_FLAGS_TXSW))
6361                         return false;
6362         } else {
6363                 u8 l4_hdr = 0;
6364                 switch (protocol) {
6365                 case __constant_htons(ETH_P_IP):
6366                         vlan_macip_lens |= skb_network_header_len(skb);
6367                         type_tucmd |= IXGBE_ADVTXD_TUCMD_IPV4;
6368                         l4_hdr = ip_hdr(skb)->protocol;
6369                         break;
6370                 case __constant_htons(ETH_P_IPV6):
6371                         vlan_macip_lens |= skb_network_header_len(skb);
6372                         l4_hdr = ipv6_hdr(skb)->nexthdr;
6373                         break;
6374                 default:
6375                         if (unlikely(net_ratelimit())) {
6376                                 dev_warn(tx_ring->dev,
6377                                  "partial checksum but proto=%x!\n",
6378                                  skb->protocol);
6379                         }
6380                         break;
6381                 }
6382
6383                 switch (l4_hdr) {
6384                 case IPPROTO_TCP:
6385                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
6386                         mss_l4len_idx = tcp_hdrlen(skb) <<
6387                                         IXGBE_ADVTXD_L4LEN_SHIFT;
6388                         break;
6389                 case IPPROTO_SCTP:
6390                         type_tucmd |= IXGBE_ADVTXD_TUCMD_L4T_SCTP;
6391                         mss_l4len_idx = sizeof(struct sctphdr) <<
6392                                         IXGBE_ADVTXD_L4LEN_SHIFT;
6393                         break;
6394                 case IPPROTO_UDP:
6395                         mss_l4len_idx = sizeof(struct udphdr) <<
6396                                         IXGBE_ADVTXD_L4LEN_SHIFT;
6397                         break;
6398                 default:
6399                         if (unlikely(net_ratelimit())) {
6400                                 dev_warn(tx_ring->dev,
6401                                  "partial checksum but l4 proto=%x!\n",
6402                                  skb->protocol);
6403                         }
6404                         break;
6405                 }
6406         }
6407
6408         vlan_macip_lens |= skb_network_offset(skb) << IXGBE_ADVTXD_MACLEN_SHIFT;
6409         vlan_macip_lens |= tx_flags & IXGBE_TX_FLAGS_VLAN_MASK;
6410
6411         ixgbe_tx_ctxtdesc(tx_ring, vlan_macip_lens, 0,
6412                           type_tucmd, mss_l4len_idx);
6413
6414         return (skb->ip_summed == CHECKSUM_PARTIAL);
6415 }
6416
6417 static __le32 ixgbe_tx_cmd_type(u32 tx_flags)
6418 {
6419         /* set type for advanced descriptor with frame checksum insertion */
6420         __le32 cmd_type = cpu_to_le32(IXGBE_ADVTXD_DTYP_DATA |
6421                                       IXGBE_ADVTXD_DCMD_IFCS |
6422                                       IXGBE_ADVTXD_DCMD_DEXT);
6423
6424         /* set HW vlan bit if vlan is present */
6425         if (tx_flags & IXGBE_TX_FLAGS_HW_VLAN)
6426                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_VLE);
6427
6428         /* set segmentation enable bits for TSO/FSO */
6429 #ifdef IXGBE_FCOE
6430         if ((tx_flags & IXGBE_TX_FLAGS_TSO) || (tx_flags & IXGBE_TX_FLAGS_FSO))
6431 #else
6432         if (tx_flags & IXGBE_TX_FLAGS_TSO)
6433 #endif
6434                 cmd_type |= cpu_to_le32(IXGBE_ADVTXD_DCMD_TSE);
6435
6436         return cmd_type;
6437 }
6438
6439 static __le32 ixgbe_tx_olinfo_status(u32 tx_flags, unsigned int paylen)
6440 {
6441         __le32 olinfo_status =
6442                 cpu_to_le32(paylen << IXGBE_ADVTXD_PAYLEN_SHIFT);
6443
6444         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6445                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM |
6446                                             (1 << IXGBE_ADVTXD_IDX_SHIFT));
6447                 /* enble IPv4 checksum for TSO */
6448                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6449                         olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_IXSM);
6450         }
6451
6452         /* enable L4 checksum for TSO and TX checksum offload */
6453         if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6454                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_POPTS_TXSM);
6455
6456 #ifdef IXGBE_FCOE
6457         /* use index 1 context for FCOE/FSO */
6458         if (tx_flags & IXGBE_TX_FLAGS_FCOE)
6459                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC |
6460                                             (1 << IXGBE_ADVTXD_IDX_SHIFT));
6461
6462 #endif
6463         /*
6464          * Check Context must be set if Tx switch is enabled, which it
6465          * always is for case where virtual functions are running
6466          */
6467         if (tx_flags & IXGBE_TX_FLAGS_TXSW)
6468                 olinfo_status |= cpu_to_le32(IXGBE_ADVTXD_CC);
6469
6470         return olinfo_status;
6471 }
6472
6473 #define IXGBE_TXD_CMD (IXGBE_TXD_CMD_EOP | \
6474                        IXGBE_TXD_CMD_RS)
6475
6476 static void ixgbe_tx_map(struct ixgbe_ring *tx_ring,
6477                          struct sk_buff *skb,
6478                          struct ixgbe_tx_buffer *first,
6479                          u32 tx_flags,
6480                          const u8 hdr_len)
6481 {
6482         struct device *dev = tx_ring->dev;
6483         struct ixgbe_tx_buffer *tx_buffer_info;
6484         union ixgbe_adv_tx_desc *tx_desc;
6485         dma_addr_t dma;
6486         __le32 cmd_type, olinfo_status;
6487         struct skb_frag_struct *frag;
6488         unsigned int f = 0;
6489         unsigned int data_len = skb->data_len;
6490         unsigned int size = skb_headlen(skb);
6491         u32 offset = 0;
6492         u32 paylen = skb->len - hdr_len;
6493         u16 i = tx_ring->next_to_use;
6494         u16 gso_segs;
6495
6496 #ifdef IXGBE_FCOE
6497         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6498                 if (data_len >= sizeof(struct fcoe_crc_eof)) {
6499                         data_len -= sizeof(struct fcoe_crc_eof);
6500                 } else {
6501                         size -= sizeof(struct fcoe_crc_eof) - data_len;
6502                         data_len = 0;
6503                 }
6504         }
6505
6506 #endif
6507         dma = dma_map_single(dev, skb->data, size, DMA_TO_DEVICE);
6508         if (dma_mapping_error(dev, dma))
6509                 goto dma_error;
6510
6511         cmd_type = ixgbe_tx_cmd_type(tx_flags);
6512         olinfo_status = ixgbe_tx_olinfo_status(tx_flags, paylen);
6513
6514         tx_desc = IXGBE_TX_DESC_ADV(tx_ring, i);
6515
6516         for (;;) {
6517                 while (size > IXGBE_MAX_DATA_PER_TXD) {
6518                         tx_desc->read.buffer_addr = cpu_to_le64(dma + offset);
6519                         tx_desc->read.cmd_type_len =
6520                                 cmd_type | cpu_to_le32(IXGBE_MAX_DATA_PER_TXD);
6521                         tx_desc->read.olinfo_status = olinfo_status;
6522
6523                         offset += IXGBE_MAX_DATA_PER_TXD;
6524                         size -= IXGBE_MAX_DATA_PER_TXD;
6525
6526                         tx_desc++;
6527                         i++;
6528                         if (i == tx_ring->count) {
6529                                 tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
6530                                 i = 0;
6531                         }
6532                 }
6533
6534                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6535                 tx_buffer_info->length = offset + size;
6536                 tx_buffer_info->tx_flags = tx_flags;
6537                 tx_buffer_info->dma = dma;
6538
6539                 tx_desc->read.buffer_addr = cpu_to_le64(dma + offset);
6540                 tx_desc->read.cmd_type_len = cmd_type | cpu_to_le32(size);
6541                 tx_desc->read.olinfo_status = olinfo_status;
6542
6543                 if (!data_len)
6544                         break;
6545
6546                 frag = &skb_shinfo(skb)->frags[f];
6547 #ifdef IXGBE_FCOE
6548                 size = min_t(unsigned int, data_len, skb_frag_size(frag));
6549 #else
6550                 size = skb_frag_size(frag);
6551 #endif
6552                 data_len -= size;
6553                 f++;
6554
6555                 offset = 0;
6556                 tx_flags |= IXGBE_TX_FLAGS_MAPPED_AS_PAGE;
6557
6558                 dma = skb_frag_dma_map(dev, frag, 0, size, DMA_TO_DEVICE);
6559                 if (dma_mapping_error(dev, dma))
6560                         goto dma_error;
6561
6562                 tx_desc++;
6563                 i++;
6564                 if (i == tx_ring->count) {
6565                         tx_desc = IXGBE_TX_DESC_ADV(tx_ring, 0);
6566                         i = 0;
6567                 }
6568         }
6569
6570         tx_desc->read.cmd_type_len |= cpu_to_le32(IXGBE_TXD_CMD);
6571
6572         i++;
6573         if (i == tx_ring->count)
6574                 i = 0;
6575
6576         tx_ring->next_to_use = i;
6577
6578         if (tx_flags & IXGBE_TX_FLAGS_TSO)
6579                 gso_segs = skb_shinfo(skb)->gso_segs;
6580 #ifdef IXGBE_FCOE
6581         /* adjust for FCoE Sequence Offload */
6582         else if (tx_flags & IXGBE_TX_FLAGS_FSO)
6583                 gso_segs = DIV_ROUND_UP(skb->len - hdr_len,
6584                                         skb_shinfo(skb)->gso_size);
6585 #endif /* IXGBE_FCOE */
6586         else
6587                 gso_segs = 1;
6588
6589         /* multiply data chunks by size of headers */
6590         tx_buffer_info->bytecount = paylen + (gso_segs * hdr_len);
6591         tx_buffer_info->gso_segs = gso_segs;
6592         tx_buffer_info->skb = skb;
6593
6594         /* set the timestamp */
6595         first->time_stamp = jiffies;
6596
6597         /*
6598          * Force memory writes to complete before letting h/w
6599          * know there are new descriptors to fetch.  (Only
6600          * applicable for weak-ordered memory model archs,
6601          * such as IA-64).
6602          */
6603         wmb();
6604
6605         /* set next_to_watch value indicating a packet is present */
6606         first->next_to_watch = tx_desc;
6607
6608         /* notify HW of packet */
6609         writel(i, tx_ring->tail);
6610
6611         return;
6612 dma_error:
6613         dev_err(dev, "TX DMA map failed\n");
6614
6615         /* clear dma mappings for failed tx_buffer_info map */
6616         for (;;) {
6617                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6618                 ixgbe_unmap_tx_resource(tx_ring, tx_buffer_info);
6619                 if (tx_buffer_info == first)
6620                         break;
6621                 if (i == 0)
6622                         i = tx_ring->count;
6623                 i--;
6624         }
6625
6626         dev_kfree_skb_any(skb);
6627
6628         tx_ring->next_to_use = i;
6629 }
6630
6631 static void ixgbe_atr(struct ixgbe_ring *ring, struct sk_buff *skb,
6632                       u32 tx_flags, __be16 protocol)
6633 {
6634         struct ixgbe_q_vector *q_vector = ring->q_vector;
6635         union ixgbe_atr_hash_dword input = { .dword = 0 };
6636         union ixgbe_atr_hash_dword common = { .dword = 0 };
6637         union {
6638                 unsigned char *network;
6639                 struct iphdr *ipv4;
6640                 struct ipv6hdr *ipv6;
6641         } hdr;
6642         struct tcphdr *th;
6643         __be16 vlan_id;
6644
6645         /* if ring doesn't have a interrupt vector, cannot perform ATR */
6646         if (!q_vector)
6647                 return;
6648
6649         /* do nothing if sampling is disabled */
6650         if (!ring->atr_sample_rate)
6651                 return;
6652
6653         ring->atr_count++;
6654
6655         /* snag network header to get L4 type and address */
6656         hdr.network = skb_network_header(skb);
6657
6658         /* Currently only IPv4/IPv6 with TCP is supported */
6659         if ((protocol != __constant_htons(ETH_P_IPV6) ||
6660              hdr.ipv6->nexthdr != IPPROTO_TCP) &&
6661             (protocol != __constant_htons(ETH_P_IP) ||
6662              hdr.ipv4->protocol != IPPROTO_TCP))
6663                 return;
6664
6665         th = tcp_hdr(skb);
6666
6667         /* skip this packet since it is invalid or the socket is closing */
6668         if (!th || th->fin)
6669                 return;
6670
6671         /* sample on all syn packets or once every atr sample count */
6672         if (!th->syn && (ring->atr_count < ring->atr_sample_rate))
6673                 return;
6674
6675         /* reset sample count */
6676         ring->atr_count = 0;
6677
6678         vlan_id = htons(tx_flags >> IXGBE_TX_FLAGS_VLAN_SHIFT);
6679
6680         /*
6681          * src and dst are inverted, think how the receiver sees them
6682          *
6683          * The input is broken into two sections, a non-compressed section
6684          * containing vm_pool, vlan_id, and flow_type.  The rest of the data
6685          * is XORed together and stored in the compressed dword.
6686          */
6687         input.formatted.vlan_id = vlan_id;
6688
6689         /*
6690          * since src port and flex bytes occupy the same word XOR them together
6691          * and write the value to source port portion of compressed dword
6692          */
6693         if (tx_flags & (IXGBE_TX_FLAGS_SW_VLAN | IXGBE_TX_FLAGS_HW_VLAN))
6694                 common.port.src ^= th->dest ^ __constant_htons(ETH_P_8021Q);
6695         else
6696                 common.port.src ^= th->dest ^ protocol;
6697         common.port.dst ^= th->source;
6698
6699         if (protocol == __constant_htons(ETH_P_IP)) {
6700                 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV4;
6701                 common.ip ^= hdr.ipv4->saddr ^ hdr.ipv4->daddr;
6702         } else {
6703                 input.formatted.flow_type = IXGBE_ATR_FLOW_TYPE_TCPV6;
6704                 common.ip ^= hdr.ipv6->saddr.s6_addr32[0] ^
6705                              hdr.ipv6->saddr.s6_addr32[1] ^
6706                              hdr.ipv6->saddr.s6_addr32[2] ^
6707                              hdr.ipv6->saddr.s6_addr32[3] ^
6708                              hdr.ipv6->daddr.s6_addr32[0] ^
6709                              hdr.ipv6->daddr.s6_addr32[1] ^
6710                              hdr.ipv6->daddr.s6_addr32[2] ^
6711                              hdr.ipv6->daddr.s6_addr32[3];
6712         }
6713
6714         /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6715         ixgbe_fdir_add_signature_filter_82599(&q_vector->adapter->hw,
6716                                               input, common, ring->queue_index);
6717 }
6718
6719 static int __ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6720 {
6721         netif_stop_subqueue(tx_ring->netdev, tx_ring->queue_index);
6722         /* Herbert's original patch had:
6723          *  smp_mb__after_netif_stop_queue();
6724          * but since that doesn't exist yet, just open code it. */
6725         smp_mb();
6726
6727         /* We need to check again in a case another CPU has just
6728          * made room available. */
6729         if (likely(ixgbe_desc_unused(tx_ring) < size))
6730                 return -EBUSY;
6731
6732         /* A reprieve! - use start_queue because it doesn't call schedule */
6733         netif_start_subqueue(tx_ring->netdev, tx_ring->queue_index);
6734         ++tx_ring->tx_stats.restart_queue;
6735         return 0;
6736 }
6737
6738 static inline int ixgbe_maybe_stop_tx(struct ixgbe_ring *tx_ring, u16 size)
6739 {
6740         if (likely(ixgbe_desc_unused(tx_ring) >= size))
6741                 return 0;
6742         return __ixgbe_maybe_stop_tx(tx_ring, size);
6743 }
6744
6745 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6746 {
6747         struct ixgbe_adapter *adapter = netdev_priv(dev);
6748         int txq = skb_rx_queue_recorded(skb) ? skb_get_rx_queue(skb) :
6749                                                smp_processor_id();
6750 #ifdef IXGBE_FCOE
6751         __be16 protocol = vlan_get_protocol(skb);
6752
6753         if (((protocol == htons(ETH_P_FCOE)) ||
6754             (protocol == htons(ETH_P_FIP))) &&
6755             (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6756                 txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6757                 txq += adapter->ring_feature[RING_F_FCOE].mask;
6758                 return txq;
6759         }
6760 #endif
6761
6762         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6763                 while (unlikely(txq >= dev->real_num_tx_queues))
6764                         txq -= dev->real_num_tx_queues;
6765                 return txq;
6766         }
6767
6768         return skb_tx_hash(dev, skb);
6769 }
6770
6771 netdev_tx_t ixgbe_xmit_frame_ring(struct sk_buff *skb,
6772                           struct ixgbe_adapter *adapter,
6773                           struct ixgbe_ring *tx_ring)
6774 {
6775         struct ixgbe_tx_buffer *first;
6776         int tso;
6777         u32 tx_flags = 0;
6778 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6779         unsigned short f;
6780 #endif
6781         u16 count = TXD_USE_COUNT(skb_headlen(skb));
6782         __be16 protocol = skb->protocol;
6783         u8 hdr_len = 0;
6784
6785         /*
6786          * need: 1 descriptor per page * PAGE_SIZE/IXGBE_MAX_DATA_PER_TXD,
6787          *       + 1 desc for skb_head_len/IXGBE_MAX_DATA_PER_TXD,
6788          *       + 2 desc gap to keep tail from touching head,
6789          *       + 1 desc for context descriptor,
6790          * otherwise try next time
6791          */
6792 #if PAGE_SIZE > IXGBE_MAX_DATA_PER_TXD
6793         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6794                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6795 #else
6796         count += skb_shinfo(skb)->nr_frags;
6797 #endif
6798         if (ixgbe_maybe_stop_tx(tx_ring, count + 3)) {
6799                 tx_ring->tx_stats.tx_busy++;
6800                 return NETDEV_TX_BUSY;
6801         }
6802
6803 #ifdef CONFIG_PCI_IOV
6804         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6805                 tx_flags |= IXGBE_TX_FLAGS_TXSW;
6806
6807 #endif
6808         /* if we have a HW VLAN tag being added default to the HW one */
6809         if (vlan_tx_tag_present(skb)) {
6810                 tx_flags |= vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6811                 tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6812         /* else if it is a SW VLAN check the next protocol and store the tag */
6813         } else if (protocol == __constant_htons(ETH_P_8021Q)) {
6814                 struct vlan_hdr *vhdr, _vhdr;
6815                 vhdr = skb_header_pointer(skb, ETH_HLEN, sizeof(_vhdr), &_vhdr);
6816                 if (!vhdr)
6817                         goto out_drop;
6818
6819                 protocol = vhdr->h_vlan_encapsulated_proto;
6820                 tx_flags |= ntohs(vhdr->h_vlan_TCI) << IXGBE_TX_FLAGS_VLAN_SHIFT;
6821                 tx_flags |= IXGBE_TX_FLAGS_SW_VLAN;
6822         }
6823
6824         /* DCB maps skb priorities 0-7 onto 3 bit PCP of VLAN tag. */
6825         if ((adapter->flags & IXGBE_FLAG_DCB_ENABLED) &&
6826             ((tx_flags & (IXGBE_TX_FLAGS_HW_VLAN | IXGBE_TX_FLAGS_SW_VLAN)) ||
6827              (skb->priority != TC_PRIO_CONTROL))) {
6828                 tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6829                 tx_flags |= (skb->priority & 0x7) <<
6830                                         IXGBE_TX_FLAGS_VLAN_PRIO_SHIFT;
6831                 if (tx_flags & IXGBE_TX_FLAGS_SW_VLAN) {
6832                         struct vlan_ethhdr *vhdr;
6833                         if (skb_header_cloned(skb) &&
6834                             pskb_expand_head(skb, 0, 0, GFP_ATOMIC))
6835                                 goto out_drop;
6836                         vhdr = (struct vlan_ethhdr *)skb->data;
6837                         vhdr->h_vlan_TCI = htons(tx_flags >>
6838                                                  IXGBE_TX_FLAGS_VLAN_SHIFT);
6839                 } else {
6840                         tx_flags |= IXGBE_TX_FLAGS_HW_VLAN;
6841                 }
6842         }
6843
6844         /* record the location of the first descriptor for this packet */
6845         first = &tx_ring->tx_buffer_info[tx_ring->next_to_use];
6846
6847 #ifdef IXGBE_FCOE
6848         /* setup tx offload for FCoE */
6849         if ((protocol == __constant_htons(ETH_P_FCOE)) &&
6850             (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)) {
6851                 tso = ixgbe_fso(tx_ring, skb, tx_flags, &hdr_len);
6852                 if (tso < 0)
6853                         goto out_drop;
6854                 else if (tso)
6855                         tx_flags |= IXGBE_TX_FLAGS_FSO |
6856                                     IXGBE_TX_FLAGS_FCOE;
6857                 else
6858                         tx_flags |= IXGBE_TX_FLAGS_FCOE;
6859
6860                 goto xmit_fcoe;
6861         }
6862
6863 #endif /* IXGBE_FCOE */
6864         /* setup IPv4/IPv6 offloads */
6865         if (protocol == __constant_htons(ETH_P_IP))
6866                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
6867
6868         tso = ixgbe_tso(tx_ring, skb, tx_flags, protocol, &hdr_len);
6869         if (tso < 0)
6870                 goto out_drop;
6871         else if (tso)
6872                 tx_flags |= IXGBE_TX_FLAGS_TSO;
6873         else if (ixgbe_tx_csum(tx_ring, skb, tx_flags, protocol))
6874                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
6875
6876         /* add the ATR filter if ATR is on */
6877         if (test_bit(__IXGBE_TX_FDIR_INIT_DONE, &tx_ring->state))
6878                 ixgbe_atr(tx_ring, skb, tx_flags, protocol);
6879
6880 #ifdef IXGBE_FCOE
6881 xmit_fcoe:
6882 #endif /* IXGBE_FCOE */
6883         ixgbe_tx_map(tx_ring, skb, first, tx_flags, hdr_len);
6884
6885         ixgbe_maybe_stop_tx(tx_ring, DESC_NEEDED);
6886
6887         return NETDEV_TX_OK;
6888
6889 out_drop:
6890         dev_kfree_skb_any(skb);
6891         return NETDEV_TX_OK;
6892 }
6893
6894 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
6895 {
6896         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6897         struct ixgbe_ring *tx_ring;
6898
6899         tx_ring = adapter->tx_ring[skb->queue_mapping];
6900         return ixgbe_xmit_frame_ring(skb, adapter, tx_ring);
6901 }
6902
6903 /**
6904  * ixgbe_set_mac - Change the Ethernet Address of the NIC
6905  * @netdev: network interface device structure
6906  * @p: pointer to an address structure
6907  *
6908  * Returns 0 on success, negative on failure
6909  **/
6910 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6911 {
6912         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6913         struct ixgbe_hw *hw = &adapter->hw;
6914         struct sockaddr *addr = p;
6915
6916         if (!is_valid_ether_addr(addr->sa_data))
6917                 return -EADDRNOTAVAIL;
6918
6919         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6920         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6921
6922         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6923                             IXGBE_RAH_AV);
6924
6925         return 0;
6926 }
6927
6928 static int
6929 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6930 {
6931         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6932         struct ixgbe_hw *hw = &adapter->hw;
6933         u16 value;
6934         int rc;
6935
6936         if (prtad != hw->phy.mdio.prtad)
6937                 return -EINVAL;
6938         rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6939         if (!rc)
6940                 rc = value;
6941         return rc;
6942 }
6943
6944 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6945                             u16 addr, u16 value)
6946 {
6947         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6948         struct ixgbe_hw *hw = &adapter->hw;
6949
6950         if (prtad != hw->phy.mdio.prtad)
6951                 return -EINVAL;
6952         return hw->phy.ops.write_reg(hw, addr, devad, value);
6953 }
6954
6955 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6956 {
6957         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6958
6959         return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6960 }
6961
6962 /**
6963  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6964  * netdev->dev_addrs
6965  * @netdev: network interface device structure
6966  *
6967  * Returns non-zero on failure
6968  **/
6969 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6970 {
6971         int err = 0;
6972         struct ixgbe_adapter *adapter = netdev_priv(dev);
6973         struct ixgbe_mac_info *mac = &adapter->hw.mac;
6974
6975         if (is_valid_ether_addr(mac->san_addr)) {
6976                 rtnl_lock();
6977                 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6978                 rtnl_unlock();
6979         }
6980         return err;
6981 }
6982
6983 /**
6984  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6985  * netdev->dev_addrs
6986  * @netdev: network interface device structure
6987  *
6988  * Returns non-zero on failure
6989  **/
6990 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6991 {
6992         int err = 0;
6993         struct ixgbe_adapter *adapter = netdev_priv(dev);
6994         struct ixgbe_mac_info *mac = &adapter->hw.mac;
6995
6996         if (is_valid_ether_addr(mac->san_addr)) {
6997                 rtnl_lock();
6998                 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6999                 rtnl_unlock();
7000         }
7001         return err;
7002 }
7003
7004 #ifdef CONFIG_NET_POLL_CONTROLLER
7005 /*
7006  * Polling 'interrupt' - used by things like netconsole to send skbs
7007  * without having to re-enable interrupts. It's not called while
7008  * the interrupt routine is executing.
7009  */
7010 static void ixgbe_netpoll(struct net_device *netdev)
7011 {
7012         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7013         int i;
7014
7015         /* if interface is down do nothing */
7016         if (test_bit(__IXGBE_DOWN, &adapter->state))
7017                 return;
7018
7019         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
7020         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
7021                 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
7022                 for (i = 0; i < num_q_vectors; i++) {
7023                         struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
7024                         ixgbe_msix_clean_rings(0, q_vector);
7025                 }
7026         } else {
7027                 ixgbe_intr(adapter->pdev->irq, netdev);
7028         }
7029         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
7030 }
7031 #endif
7032
7033 static struct rtnl_link_stats64 *ixgbe_get_stats64(struct net_device *netdev,
7034                                                    struct rtnl_link_stats64 *stats)
7035 {
7036         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7037         int i;
7038
7039         rcu_read_lock();
7040         for (i = 0; i < adapter->num_rx_queues; i++) {
7041                 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->rx_ring[i]);
7042                 u64 bytes, packets;
7043                 unsigned int start;
7044
7045                 if (ring) {
7046                         do {
7047                                 start = u64_stats_fetch_begin_bh(&ring->syncp);
7048                                 packets = ring->stats.packets;
7049                                 bytes   = ring->stats.bytes;
7050                         } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7051                         stats->rx_packets += packets;
7052                         stats->rx_bytes   += bytes;
7053                 }
7054         }
7055
7056         for (i = 0; i < adapter->num_tx_queues; i++) {
7057                 struct ixgbe_ring *ring = ACCESS_ONCE(adapter->tx_ring[i]);
7058                 u64 bytes, packets;
7059                 unsigned int start;
7060
7061                 if (ring) {
7062                         do {
7063                                 start = u64_stats_fetch_begin_bh(&ring->syncp);
7064                                 packets = ring->stats.packets;
7065                                 bytes   = ring->stats.bytes;
7066                         } while (u64_stats_fetch_retry_bh(&ring->syncp, start));
7067                         stats->tx_packets += packets;
7068                         stats->tx_bytes   += bytes;
7069                 }
7070         }
7071         rcu_read_unlock();
7072         /* following stats updated by ixgbe_watchdog_task() */
7073         stats->multicast        = netdev->stats.multicast;
7074         stats->rx_errors        = netdev->stats.rx_errors;
7075         stats->rx_length_errors = netdev->stats.rx_length_errors;
7076         stats->rx_crc_errors    = netdev->stats.rx_crc_errors;
7077         stats->rx_missed_errors = netdev->stats.rx_missed_errors;
7078         return stats;
7079 }
7080
7081 /* ixgbe_validate_rtr - verify 802.1Qp to Rx packet buffer mapping is valid.
7082  * #adapter: pointer to ixgbe_adapter
7083  * @tc: number of traffic classes currently enabled
7084  *
7085  * Configure a valid 802.1Qp to Rx packet buffer mapping ie confirm
7086  * 802.1Q priority maps to a packet buffer that exists.
7087  */
7088 static void ixgbe_validate_rtr(struct ixgbe_adapter *adapter, u8 tc)
7089 {
7090         struct ixgbe_hw *hw = &adapter->hw;
7091         u32 reg, rsave;
7092         int i;
7093
7094         /* 82598 have a static priority to TC mapping that can not
7095          * be changed so no validation is needed.
7096          */
7097         if (hw->mac.type == ixgbe_mac_82598EB)
7098                 return;
7099
7100         reg = IXGBE_READ_REG(hw, IXGBE_RTRUP2TC);
7101         rsave = reg;
7102
7103         for (i = 0; i < MAX_TRAFFIC_CLASS; i++) {
7104                 u8 up2tc = reg >> (i * IXGBE_RTRUP2TC_UP_SHIFT);
7105
7106                 /* If up2tc is out of bounds default to zero */
7107                 if (up2tc > tc)
7108                         reg &= ~(0x7 << IXGBE_RTRUP2TC_UP_SHIFT);
7109         }
7110
7111         if (reg != rsave)
7112                 IXGBE_WRITE_REG(hw, IXGBE_RTRUP2TC, reg);
7113
7114         return;
7115 }
7116
7117
7118 /* ixgbe_setup_tc - routine to configure net_device for multiple traffic
7119  * classes.
7120  *
7121  * @netdev: net device to configure
7122  * @tc: number of traffic classes to enable
7123  */
7124 int ixgbe_setup_tc(struct net_device *dev, u8 tc)
7125 {
7126         struct ixgbe_adapter *adapter = netdev_priv(dev);
7127         struct ixgbe_hw *hw = &adapter->hw;
7128
7129         /* Multiple traffic classes requires multiple queues */
7130         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
7131                 e_err(drv, "Enable failed, needs MSI-X\n");
7132                 return -EINVAL;
7133         }
7134
7135         /* Hardware supports up to 8 traffic classes */
7136         if (tc > adapter->dcb_cfg.num_tcs.pg_tcs ||
7137             (hw->mac.type == ixgbe_mac_82598EB && tc < MAX_TRAFFIC_CLASS))
7138                 return -EINVAL;
7139
7140         /* Hardware has to reinitialize queues and interrupts to
7141          * match packet buffer alignment. Unfortunantly, the
7142          * hardware is not flexible enough to do this dynamically.
7143          */
7144         if (netif_running(dev))
7145                 ixgbe_close(dev);
7146         ixgbe_clear_interrupt_scheme(adapter);
7147
7148         if (tc) {
7149                 netdev_set_num_tc(dev, tc);
7150                 adapter->last_lfc_mode = adapter->hw.fc.current_mode;
7151
7152                 adapter->flags |= IXGBE_FLAG_DCB_ENABLED;
7153                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7154
7155                 if (adapter->hw.mac.type == ixgbe_mac_82598EB)
7156                         adapter->hw.fc.requested_mode = ixgbe_fc_none;
7157         } else {
7158                 netdev_reset_tc(dev);
7159
7160                 adapter->hw.fc.requested_mode = adapter->last_lfc_mode;
7161
7162                 adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
7163                 adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7164
7165                 adapter->temp_dcb_cfg.pfc_mode_enable = false;
7166                 adapter->dcb_cfg.pfc_mode_enable = false;
7167         }
7168
7169         ixgbe_init_interrupt_scheme(adapter);
7170         ixgbe_validate_rtr(adapter, tc);
7171         if (netif_running(dev))
7172                 ixgbe_open(dev);
7173
7174         return 0;
7175 }
7176
7177 void ixgbe_do_reset(struct net_device *netdev)
7178 {
7179         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7180
7181         if (netif_running(netdev))
7182                 ixgbe_reinit_locked(adapter);
7183         else
7184                 ixgbe_reset(adapter);
7185 }
7186
7187 static u32 ixgbe_fix_features(struct net_device *netdev, u32 data)
7188 {
7189         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7190
7191 #ifdef CONFIG_DCB
7192         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
7193                 data &= ~NETIF_F_HW_VLAN_RX;
7194 #endif
7195
7196         /* return error if RXHASH is being enabled when RSS is not supported */
7197         if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED))
7198                 data &= ~NETIF_F_RXHASH;
7199
7200         /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7201         if (!(data & NETIF_F_RXCSUM))
7202                 data &= ~NETIF_F_LRO;
7203
7204         /* Turn off LRO if not RSC capable or invalid ITR settings */
7205         if (!(adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)) {
7206                 data &= ~NETIF_F_LRO;
7207         } else if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
7208                    (adapter->rx_itr_setting != 1 &&
7209                     adapter->rx_itr_setting > IXGBE_MAX_RSC_INT_RATE)) {
7210                 data &= ~NETIF_F_LRO;
7211                 e_info(probe, "rx-usecs set too low, not enabling RSC\n");
7212         }
7213
7214         return data;
7215 }
7216
7217 static int ixgbe_set_features(struct net_device *netdev, u32 data)
7218 {
7219         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7220         bool need_reset = false;
7221
7222         /* If Rx checksum is disabled, then RSC/LRO should also be disabled */
7223         if (!(data & NETIF_F_RXCSUM))
7224                 adapter->flags &= ~IXGBE_FLAG_RX_CSUM_ENABLED;
7225         else
7226                 adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
7227
7228         /* Make sure RSC matches LRO, reset if change */
7229         if (!!(data & NETIF_F_LRO) !=
7230              !!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)) {
7231                 adapter->flags2 ^= IXGBE_FLAG2_RSC_ENABLED;
7232                 switch (adapter->hw.mac.type) {
7233                 case ixgbe_mac_X540:
7234                 case ixgbe_mac_82599EB:
7235                         need_reset = true;
7236                         break;
7237                 default:
7238                         break;
7239                 }
7240         }
7241
7242         /*
7243          * Check if Flow Director n-tuple support was enabled or disabled.  If
7244          * the state changed, we need to reset.
7245          */
7246         if (!(adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)) {
7247                 /* turn off ATR, enable perfect filters and reset */
7248                 if (data & NETIF_F_NTUPLE) {
7249                         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
7250                         adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7251                         need_reset = true;
7252                 }
7253         } else if (!(data & NETIF_F_NTUPLE)) {
7254                 /* turn off Flow Director, set ATR and reset */
7255                 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
7256                 if ((adapter->flags &  IXGBE_FLAG_RSS_ENABLED) &&
7257                     !(adapter->flags &  IXGBE_FLAG_DCB_ENABLED))
7258                         adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
7259                 need_reset = true;
7260         }
7261
7262         if (need_reset)
7263                 ixgbe_do_reset(netdev);
7264
7265         return 0;
7266
7267 }
7268
7269 static const struct net_device_ops ixgbe_netdev_ops = {
7270         .ndo_open               = ixgbe_open,
7271         .ndo_stop               = ixgbe_close,
7272         .ndo_start_xmit         = ixgbe_xmit_frame,
7273         .ndo_select_queue       = ixgbe_select_queue,
7274         .ndo_set_rx_mode        = ixgbe_set_rx_mode,
7275         .ndo_validate_addr      = eth_validate_addr,
7276         .ndo_set_mac_address    = ixgbe_set_mac,
7277         .ndo_change_mtu         = ixgbe_change_mtu,
7278         .ndo_tx_timeout         = ixgbe_tx_timeout,
7279         .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
7280         .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
7281         .ndo_do_ioctl           = ixgbe_ioctl,
7282         .ndo_set_vf_mac         = ixgbe_ndo_set_vf_mac,
7283         .ndo_set_vf_vlan        = ixgbe_ndo_set_vf_vlan,
7284         .ndo_set_vf_tx_rate     = ixgbe_ndo_set_vf_bw,
7285         .ndo_set_vf_spoofchk    = ixgbe_ndo_set_vf_spoofchk,
7286         .ndo_get_vf_config      = ixgbe_ndo_get_vf_config,
7287         .ndo_get_stats64        = ixgbe_get_stats64,
7288         .ndo_setup_tc           = ixgbe_setup_tc,
7289 #ifdef CONFIG_NET_POLL_CONTROLLER
7290         .ndo_poll_controller    = ixgbe_netpoll,
7291 #endif
7292 #ifdef IXGBE_FCOE
7293         .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
7294         .ndo_fcoe_ddp_target = ixgbe_fcoe_ddp_target,
7295         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
7296         .ndo_fcoe_enable = ixgbe_fcoe_enable,
7297         .ndo_fcoe_disable = ixgbe_fcoe_disable,
7298         .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
7299 #endif /* IXGBE_FCOE */
7300         .ndo_set_features = ixgbe_set_features,
7301         .ndo_fix_features = ixgbe_fix_features,
7302 };
7303
7304 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
7305                            const struct ixgbe_info *ii)
7306 {
7307 #ifdef CONFIG_PCI_IOV
7308         struct ixgbe_hw *hw = &adapter->hw;
7309
7310         if (hw->mac.type == ixgbe_mac_82598EB)
7311                 return;
7312
7313         /* The 82599 supports up to 64 VFs per physical function
7314          * but this implementation limits allocation to 63 so that
7315          * basic networking resources are still available to the
7316          * physical function
7317          */
7318         adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
7319         ixgbe_enable_sriov(adapter, ii);
7320 #endif /* CONFIG_PCI_IOV */
7321 }
7322
7323 /**
7324  * ixgbe_probe - Device Initialization Routine
7325  * @pdev: PCI device information struct
7326  * @ent: entry in ixgbe_pci_tbl
7327  *
7328  * Returns 0 on success, negative on failure
7329  *
7330  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
7331  * The OS initialization, configuring of the adapter private structure,
7332  * and a hardware reset occur.
7333  **/
7334 static int __devinit ixgbe_probe(struct pci_dev *pdev,
7335                                  const struct pci_device_id *ent)
7336 {
7337         struct net_device *netdev;
7338         struct ixgbe_adapter *adapter = NULL;
7339         struct ixgbe_hw *hw;
7340         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
7341         static int cards_found;
7342         int i, err, pci_using_dac;
7343         u8 part_str[IXGBE_PBANUM_LENGTH];
7344         unsigned int indices = num_possible_cpus();
7345 #ifdef IXGBE_FCOE
7346         u16 device_caps;
7347 #endif
7348         u32 eec;
7349         u16 wol_cap;
7350
7351         /* Catch broken hardware that put the wrong VF device ID in
7352          * the PCIe SR-IOV capability.
7353          */
7354         if (pdev->is_virtfn) {
7355                 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
7356                      pci_name(pdev), pdev->vendor, pdev->device);
7357                 return -EINVAL;
7358         }
7359
7360         err = pci_enable_device_mem(pdev);
7361         if (err)
7362                 return err;
7363
7364         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
7365             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
7366                 pci_using_dac = 1;
7367         } else {
7368                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
7369                 if (err) {
7370                         err = dma_set_coherent_mask(&pdev->dev,
7371                                                     DMA_BIT_MASK(32));
7372                         if (err) {
7373                                 dev_err(&pdev->dev,
7374                                         "No usable DMA configuration, aborting\n");
7375                                 goto err_dma;
7376                         }
7377                 }
7378                 pci_using_dac = 0;
7379         }
7380
7381         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
7382                                            IORESOURCE_MEM), ixgbe_driver_name);
7383         if (err) {
7384                 dev_err(&pdev->dev,
7385                         "pci_request_selected_regions failed 0x%x\n", err);
7386                 goto err_pci_reg;
7387         }
7388
7389         pci_enable_pcie_error_reporting(pdev);
7390
7391         pci_set_master(pdev);
7392         pci_save_state(pdev);
7393
7394 #ifdef CONFIG_IXGBE_DCB
7395         indices *= MAX_TRAFFIC_CLASS;
7396 #endif
7397
7398         if (ii->mac == ixgbe_mac_82598EB)
7399                 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
7400         else
7401                 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
7402
7403 #ifdef IXGBE_FCOE
7404         indices += min_t(unsigned int, num_possible_cpus(),
7405                          IXGBE_MAX_FCOE_INDICES);
7406 #endif
7407         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
7408         if (!netdev) {
7409                 err = -ENOMEM;
7410                 goto err_alloc_etherdev;
7411         }
7412
7413         SET_NETDEV_DEV(netdev, &pdev->dev);
7414
7415         adapter = netdev_priv(netdev);
7416         pci_set_drvdata(pdev, adapter);
7417
7418         adapter->netdev = netdev;
7419         adapter->pdev = pdev;
7420         hw = &adapter->hw;
7421         hw->back = adapter;
7422         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
7423
7424         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
7425                               pci_resource_len(pdev, 0));
7426         if (!hw->hw_addr) {
7427                 err = -EIO;
7428                 goto err_ioremap;
7429         }
7430
7431         for (i = 1; i <= 5; i++) {
7432                 if (pci_resource_len(pdev, i) == 0)
7433                         continue;
7434         }
7435
7436         netdev->netdev_ops = &ixgbe_netdev_ops;
7437         ixgbe_set_ethtool_ops(netdev);
7438         netdev->watchdog_timeo = 5 * HZ;
7439         strncpy(netdev->name, pci_name(pdev), sizeof(netdev->name) - 1);
7440
7441         adapter->bd_number = cards_found;
7442
7443         /* Setup hw api */
7444         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
7445         hw->mac.type  = ii->mac;
7446
7447         /* EEPROM */
7448         memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
7449         eec = IXGBE_READ_REG(hw, IXGBE_EEC);
7450         /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
7451         if (!(eec & (1 << 8)))
7452                 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
7453
7454         /* PHY */
7455         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
7456         hw->phy.sfp_type = ixgbe_sfp_type_unknown;
7457         /* ixgbe_identify_phy_generic will set prtad and mmds properly */
7458         hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
7459         hw->phy.mdio.mmds = 0;
7460         hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
7461         hw->phy.mdio.dev = netdev;
7462         hw->phy.mdio.mdio_read = ixgbe_mdio_read;
7463         hw->phy.mdio.mdio_write = ixgbe_mdio_write;
7464
7465         ii->get_invariants(hw);
7466
7467         /* setup the private structure */
7468         err = ixgbe_sw_init(adapter);
7469         if (err)
7470                 goto err_sw_init;
7471
7472         /* Make it possible the adapter to be woken up via WOL */
7473         switch (adapter->hw.mac.type) {
7474         case ixgbe_mac_82599EB:
7475         case ixgbe_mac_X540:
7476                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7477                 break;
7478         default:
7479                 break;
7480         }
7481
7482         /*
7483          * If there is a fan on this device and it has failed log the
7484          * failure.
7485          */
7486         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
7487                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
7488                 if (esdp & IXGBE_ESDP_SDP1)
7489                         e_crit(probe, "Fan has stopped, replace the adapter\n");
7490         }
7491
7492         /* reset_hw fills in the perm_addr as well */
7493         hw->phy.reset_if_overtemp = true;
7494         err = hw->mac.ops.reset_hw(hw);
7495         hw->phy.reset_if_overtemp = false;
7496         if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
7497             hw->mac.type == ixgbe_mac_82598EB) {
7498                 err = 0;
7499         } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
7500                 e_dev_err("failed to load because an unsupported SFP+ "
7501                           "module type was detected.\n");
7502                 e_dev_err("Reload the driver after installing a supported "
7503                           "module.\n");
7504                 goto err_sw_init;
7505         } else if (err) {
7506                 e_dev_err("HW Init failed: %d\n", err);
7507                 goto err_sw_init;
7508         }
7509
7510         ixgbe_probe_vf(adapter, ii);
7511
7512         netdev->features = NETIF_F_SG |
7513                            NETIF_F_IP_CSUM |
7514                            NETIF_F_IPV6_CSUM |
7515                            NETIF_F_HW_VLAN_TX |
7516                            NETIF_F_HW_VLAN_RX |
7517                            NETIF_F_HW_VLAN_FILTER |
7518                            NETIF_F_TSO |
7519                            NETIF_F_TSO6 |
7520                            NETIF_F_RXHASH |
7521                            NETIF_F_RXCSUM;
7522
7523         netdev->hw_features = netdev->features;
7524
7525         switch (adapter->hw.mac.type) {
7526         case ixgbe_mac_82599EB:
7527         case ixgbe_mac_X540:
7528                 netdev->features |= NETIF_F_SCTP_CSUM;
7529                 netdev->hw_features |= NETIF_F_SCTP_CSUM |
7530                                        NETIF_F_NTUPLE;
7531                 break;
7532         default:
7533                 break;
7534         }
7535
7536         netdev->vlan_features |= NETIF_F_TSO;
7537         netdev->vlan_features |= NETIF_F_TSO6;
7538         netdev->vlan_features |= NETIF_F_IP_CSUM;
7539         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
7540         netdev->vlan_features |= NETIF_F_SG;
7541
7542         netdev->priv_flags |= IFF_UNICAST_FLT;
7543
7544         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7545                 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
7546                                     IXGBE_FLAG_DCB_ENABLED);
7547
7548 #ifdef CONFIG_IXGBE_DCB
7549         netdev->dcbnl_ops = &dcbnl_ops;
7550 #endif
7551
7552 #ifdef IXGBE_FCOE
7553         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7554                 if (hw->mac.ops.get_device_caps) {
7555                         hw->mac.ops.get_device_caps(hw, &device_caps);
7556                         if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
7557                                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
7558                 }
7559         }
7560         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
7561                 netdev->vlan_features |= NETIF_F_FCOE_CRC;
7562                 netdev->vlan_features |= NETIF_F_FSO;
7563                 netdev->vlan_features |= NETIF_F_FCOE_MTU;
7564         }
7565 #endif /* IXGBE_FCOE */
7566         if (pci_using_dac) {
7567                 netdev->features |= NETIF_F_HIGHDMA;
7568                 netdev->vlan_features |= NETIF_F_HIGHDMA;
7569         }
7570
7571         if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
7572                 netdev->hw_features |= NETIF_F_LRO;
7573         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
7574                 netdev->features |= NETIF_F_LRO;
7575
7576         /* make sure the EEPROM is good */
7577         if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
7578                 e_dev_err("The EEPROM Checksum Is Not Valid\n");
7579                 err = -EIO;
7580                 goto err_eeprom;
7581         }
7582
7583         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
7584         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
7585
7586         if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
7587                 e_dev_err("invalid MAC address\n");
7588                 err = -EIO;
7589                 goto err_eeprom;
7590         }
7591
7592         /* power down the optics for multispeed fiber and 82599 SFP+ fiber */
7593         if (hw->mac.ops.disable_tx_laser &&
7594             ((hw->phy.multispeed_fiber) ||
7595              ((hw->mac.ops.get_media_type(hw) == ixgbe_media_type_fiber) &&
7596               (hw->mac.type == ixgbe_mac_82599EB))))
7597                 hw->mac.ops.disable_tx_laser(hw);
7598
7599         setup_timer(&adapter->service_timer, &ixgbe_service_timer,
7600                     (unsigned long) adapter);
7601
7602         INIT_WORK(&adapter->service_task, ixgbe_service_task);
7603         clear_bit(__IXGBE_SERVICE_SCHED, &adapter->state);
7604
7605         err = ixgbe_init_interrupt_scheme(adapter);
7606         if (err)
7607                 goto err_sw_init;
7608
7609         if (!(adapter->flags & IXGBE_FLAG_RSS_ENABLED)) {
7610                 netdev->hw_features &= ~NETIF_F_RXHASH;
7611                 netdev->features &= ~NETIF_F_RXHASH;
7612         }
7613
7614         /* WOL not supported for all but the following */
7615         adapter->wol = 0;
7616         switch (pdev->device) {
7617         case IXGBE_DEV_ID_82599_SFP:
7618                 /* Only this subdevice supports WOL */
7619                 if (pdev->subsystem_device == IXGBE_SUBDEV_ID_82599_SFP)
7620                         adapter->wol = IXGBE_WUFC_MAG;
7621                 break;
7622         case IXGBE_DEV_ID_82599_COMBO_BACKPLANE:
7623                 /* All except this subdevice support WOL */
7624                 if (pdev->subsystem_device != IXGBE_SUBDEV_ID_82599_KX4_KR_MEZZ)
7625                         adapter->wol = IXGBE_WUFC_MAG;
7626                 break;
7627         case IXGBE_DEV_ID_82599_KX4:
7628                 adapter->wol = IXGBE_WUFC_MAG;
7629                 break;
7630         case IXGBE_DEV_ID_X540T:
7631                 /* Check eeprom to see if it is enabled */
7632                 hw->eeprom.ops.read(hw, 0x2c, &adapter->eeprom_cap);
7633                 wol_cap = adapter->eeprom_cap & IXGBE_DEVICE_CAPS_WOL_MASK;
7634
7635                 if ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0_1) ||
7636                     ((wol_cap == IXGBE_DEVICE_CAPS_WOL_PORT0) &&
7637                      (hw->bus.func == 0)))
7638                         adapter->wol = IXGBE_WUFC_MAG;
7639                 break;
7640         }
7641         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
7642
7643         /* save off EEPROM version number */
7644         hw->eeprom.ops.read(hw, 0x2e, &adapter->eeprom_verh);
7645         hw->eeprom.ops.read(hw, 0x2d, &adapter->eeprom_verl);
7646
7647         /* pick up the PCI bus settings for reporting later */
7648         hw->mac.ops.get_bus_info(hw);
7649
7650         /* print bus type/speed/width info */
7651         e_dev_info("(PCI Express:%s:%s) %pM\n",
7652                    (hw->bus.speed == ixgbe_bus_speed_5000 ? "5.0GT/s" :
7653                     hw->bus.speed == ixgbe_bus_speed_2500 ? "2.5GT/s" :
7654                     "Unknown"),
7655                    (hw->bus.width == ixgbe_bus_width_pcie_x8 ? "Width x8" :
7656                     hw->bus.width == ixgbe_bus_width_pcie_x4 ? "Width x4" :
7657                     hw->bus.width == ixgbe_bus_width_pcie_x1 ? "Width x1" :
7658                     "Unknown"),
7659                    netdev->dev_addr);
7660
7661         err = ixgbe_read_pba_string_generic(hw, part_str, IXGBE_PBANUM_LENGTH);
7662         if (err)
7663                 strncpy(part_str, "Unknown", IXGBE_PBANUM_LENGTH);
7664         if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
7665                 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, PBA No: %s\n",
7666                            hw->mac.type, hw->phy.type, hw->phy.sfp_type,
7667                            part_str);
7668         else
7669                 e_dev_info("MAC: %d, PHY: %d, PBA No: %s\n",
7670                            hw->mac.type, hw->phy.type, part_str);
7671
7672         if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
7673                 e_dev_warn("PCI-Express bandwidth available for this card is "
7674                            "not sufficient for optimal performance.\n");
7675                 e_dev_warn("For optimal performance a x8 PCI-Express slot "
7676                            "is required.\n");
7677         }
7678
7679         /* reset the hardware with the new settings */
7680         err = hw->mac.ops.start_hw(hw);
7681
7682         if (err == IXGBE_ERR_EEPROM_VERSION) {
7683                 /* We are running on a pre-production device, log a warning */
7684                 e_dev_warn("This device is a pre-production adapter/LOM. "
7685                            "Please be aware there may be issues associated "
7686                            "with your hardware.  If you are experiencing "
7687                            "problems please contact your Intel or hardware "
7688                            "representative who provided you with this "
7689                            "hardware.\n");
7690         }
7691         strcpy(netdev->name, "eth%d");
7692         err = register_netdev(netdev);
7693         if (err)
7694                 goto err_register;
7695
7696         /* carrier off reporting is important to ethtool even BEFORE open */
7697         netif_carrier_off(netdev);
7698
7699 #ifdef CONFIG_IXGBE_DCA
7700         if (dca_add_requester(&pdev->dev) == 0) {
7701                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
7702                 ixgbe_setup_dca(adapter);
7703         }
7704 #endif
7705         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7706                 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
7707                 for (i = 0; i < adapter->num_vfs; i++)
7708                         ixgbe_vf_configuration(pdev, (i | 0x10000000));
7709         }
7710
7711         /* firmware requires driver version to be 0xFFFFFFFF
7712          * since os does not support feature
7713          */
7714         if (hw->mac.ops.set_fw_drv_ver)
7715                 hw->mac.ops.set_fw_drv_ver(hw, 0xFF, 0xFF, 0xFF,
7716                                            0xFF);
7717
7718         /* add san mac addr to netdev */
7719         ixgbe_add_sanmac_netdev(netdev);
7720
7721         e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
7722         cards_found++;
7723         return 0;
7724
7725 err_register:
7726         ixgbe_release_hw_control(adapter);
7727         ixgbe_clear_interrupt_scheme(adapter);
7728 err_sw_init:
7729 err_eeprom:
7730         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
7731                 ixgbe_disable_sriov(adapter);
7732         adapter->flags2 &= ~IXGBE_FLAG2_SEARCH_FOR_SFP;
7733         iounmap(hw->hw_addr);
7734 err_ioremap:
7735         free_netdev(netdev);
7736 err_alloc_etherdev:
7737         pci_release_selected_regions(pdev,
7738                                      pci_select_bars(pdev, IORESOURCE_MEM));
7739 err_pci_reg:
7740 err_dma:
7741         pci_disable_device(pdev);
7742         return err;
7743 }
7744
7745 /**
7746  * ixgbe_remove - Device Removal Routine
7747  * @pdev: PCI device information struct
7748  *
7749  * ixgbe_remove is called by the PCI subsystem to alert the driver
7750  * that it should release a PCI device.  The could be caused by a
7751  * Hot-Plug event, or because the driver is going to be removed from
7752  * memory.
7753  **/
7754 static void __devexit ixgbe_remove(struct pci_dev *pdev)
7755 {
7756         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7757         struct net_device *netdev = adapter->netdev;
7758
7759         set_bit(__IXGBE_DOWN, &adapter->state);
7760         cancel_work_sync(&adapter->service_task);
7761
7762 #ifdef CONFIG_IXGBE_DCA
7763         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
7764                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
7765                 dca_remove_requester(&pdev->dev);
7766                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
7767         }
7768
7769 #endif
7770 #ifdef IXGBE_FCOE
7771         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
7772                 ixgbe_cleanup_fcoe(adapter);
7773
7774 #endif /* IXGBE_FCOE */
7775
7776         /* remove the added san mac */
7777         ixgbe_del_sanmac_netdev(netdev);
7778
7779         if (netdev->reg_state == NETREG_REGISTERED)
7780                 unregister_netdev(netdev);
7781
7782         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
7783                 if (!(ixgbe_check_vf_assignment(adapter)))
7784                         ixgbe_disable_sriov(adapter);
7785                 else
7786                         e_dev_warn("Unloading driver while VFs are assigned "
7787                                    "- VFs will not be deallocated\n");
7788         }
7789
7790         ixgbe_clear_interrupt_scheme(adapter);
7791
7792         ixgbe_release_hw_control(adapter);
7793
7794         iounmap(adapter->hw.hw_addr);
7795         pci_release_selected_regions(pdev, pci_select_bars(pdev,
7796                                      IORESOURCE_MEM));
7797
7798         e_dev_info("complete\n");
7799
7800         free_netdev(netdev);
7801
7802         pci_disable_pcie_error_reporting(pdev);
7803
7804         pci_disable_device(pdev);
7805 }
7806
7807 /**
7808  * ixgbe_io_error_detected - called when PCI error is detected
7809  * @pdev: Pointer to PCI device
7810  * @state: The current pci connection state
7811  *
7812  * This function is called after a PCI bus error affecting
7813  * this device has been detected.
7814  */
7815 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
7816                                                 pci_channel_state_t state)
7817 {
7818         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7819         struct net_device *netdev = adapter->netdev;
7820
7821 #ifdef CONFIG_PCI_IOV
7822         struct pci_dev *bdev, *vfdev;
7823         u32 dw0, dw1, dw2, dw3;
7824         int vf, pos;
7825         u16 req_id, pf_func;
7826
7827         if (adapter->hw.mac.type == ixgbe_mac_82598EB ||
7828             adapter->num_vfs == 0)
7829                 goto skip_bad_vf_detection;
7830
7831         bdev = pdev->bus->self;
7832         while (bdev && (bdev->pcie_type != PCI_EXP_TYPE_ROOT_PORT))
7833                 bdev = bdev->bus->self;
7834
7835         if (!bdev)
7836                 goto skip_bad_vf_detection;
7837
7838         pos = pci_find_ext_capability(bdev, PCI_EXT_CAP_ID_ERR);
7839         if (!pos)
7840                 goto skip_bad_vf_detection;
7841
7842         pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG, &dw0);
7843         pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 4, &dw1);
7844         pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 8, &dw2);
7845         pci_read_config_dword(bdev, pos + PCI_ERR_HEADER_LOG + 12, &dw3);
7846
7847         req_id = dw1 >> 16;
7848         /* On the 82599 if bit 7 of the requestor ID is set then it's a VF */
7849         if (!(req_id & 0x0080))
7850                 goto skip_bad_vf_detection;
7851
7852         pf_func = req_id & 0x01;
7853         if ((pf_func & 1) == (pdev->devfn & 1)) {
7854                 unsigned int device_id;
7855
7856                 vf = (req_id & 0x7F) >> 1;
7857                 e_dev_err("VF %d has caused a PCIe error\n", vf);
7858                 e_dev_err("TLP: dw0: %8.8x\tdw1: %8.8x\tdw2: "
7859                                 "%8.8x\tdw3: %8.8x\n",
7860                 dw0, dw1, dw2, dw3);
7861                 switch (adapter->hw.mac.type) {
7862                 case ixgbe_mac_82599EB:
7863                         device_id = IXGBE_82599_VF_DEVICE_ID;
7864                         break;
7865                 case ixgbe_mac_X540:
7866                         device_id = IXGBE_X540_VF_DEVICE_ID;
7867                         break;
7868                 default:
7869                         device_id = 0;
7870                         break;
7871                 }
7872
7873                 /* Find the pci device of the offending VF */
7874                 vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID, device_id, NULL);
7875                 while (vfdev) {
7876                         if (vfdev->devfn == (req_id & 0xFF))
7877                                 break;
7878                         vfdev = pci_get_device(IXGBE_INTEL_VENDOR_ID,
7879                                                device_id, vfdev);
7880                 }
7881                 /*
7882                  * There's a slim chance the VF could have been hot plugged,
7883                  * so if it is no longer present we don't need to issue the
7884                  * VFLR.  Just clean up the AER in that case.
7885                  */
7886                 if (vfdev) {
7887                         e_dev_err("Issuing VFLR to VF %d\n", vf);
7888                         pci_write_config_dword(vfdev, 0xA8, 0x00008000);
7889                 }
7890
7891                 pci_cleanup_aer_uncorrect_error_status(pdev);
7892         }
7893
7894         /*
7895          * Even though the error may have occurred on the other port
7896          * we still need to increment the vf error reference count for
7897          * both ports because the I/O resume function will be called
7898          * for both of them.
7899          */
7900         adapter->vferr_refcount++;
7901
7902         return PCI_ERS_RESULT_RECOVERED;
7903
7904 skip_bad_vf_detection:
7905 #endif /* CONFIG_PCI_IOV */
7906         netif_device_detach(netdev);
7907
7908         if (state == pci_channel_io_perm_failure)
7909                 return PCI_ERS_RESULT_DISCONNECT;
7910
7911         if (netif_running(netdev))
7912                 ixgbe_down(adapter);
7913         pci_disable_device(pdev);
7914
7915         /* Request a slot reset. */
7916         return PCI_ERS_RESULT_NEED_RESET;
7917 }
7918
7919 /**
7920  * ixgbe_io_slot_reset - called after the pci bus has been reset.
7921  * @pdev: Pointer to PCI device
7922  *
7923  * Restart the card from scratch, as if from a cold-boot.
7924  */
7925 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7926 {
7927         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7928         pci_ers_result_t result;
7929         int err;
7930
7931         if (pci_enable_device_mem(pdev)) {
7932                 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7933                 result = PCI_ERS_RESULT_DISCONNECT;
7934         } else {
7935                 pci_set_master(pdev);
7936                 pci_restore_state(pdev);
7937                 pci_save_state(pdev);
7938
7939                 pci_wake_from_d3(pdev, false);
7940
7941                 ixgbe_reset(adapter);
7942                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7943                 result = PCI_ERS_RESULT_RECOVERED;
7944         }
7945
7946         err = pci_cleanup_aer_uncorrect_error_status(pdev);
7947         if (err) {
7948                 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7949                           "failed 0x%0x\n", err);
7950                 /* non-fatal, continue */
7951         }
7952
7953         return result;
7954 }
7955
7956 /**
7957  * ixgbe_io_resume - called when traffic can start flowing again.
7958  * @pdev: Pointer to PCI device
7959  *
7960  * This callback is called when the error recovery driver tells us that
7961  * its OK to resume normal operation.
7962  */
7963 static void ixgbe_io_resume(struct pci_dev *pdev)
7964 {
7965         struct ixgbe_adapter *adapter = pci_get_drvdata(pdev);
7966         struct net_device *netdev = adapter->netdev;
7967
7968 #ifdef CONFIG_PCI_IOV
7969         if (adapter->vferr_refcount) {
7970                 e_info(drv, "Resuming after VF err\n");
7971                 adapter->vferr_refcount--;
7972                 return;
7973         }
7974
7975 #endif
7976         if (netif_running(netdev))
7977                 ixgbe_up(adapter);
7978
7979         netif_device_attach(netdev);
7980 }
7981
7982 static struct pci_error_handlers ixgbe_err_handler = {
7983         .error_detected = ixgbe_io_error_detected,
7984         .slot_reset = ixgbe_io_slot_reset,
7985         .resume = ixgbe_io_resume,
7986 };
7987
7988 static struct pci_driver ixgbe_driver = {
7989         .name     = ixgbe_driver_name,
7990         .id_table = ixgbe_pci_tbl,
7991         .probe    = ixgbe_probe,
7992         .remove   = __devexit_p(ixgbe_remove),
7993 #ifdef CONFIG_PM
7994         .suspend  = ixgbe_suspend,
7995         .resume   = ixgbe_resume,
7996 #endif
7997         .shutdown = ixgbe_shutdown,
7998         .err_handler = &ixgbe_err_handler
7999 };
8000
8001 /**
8002  * ixgbe_init_module - Driver Registration Routine
8003  *
8004  * ixgbe_init_module is the first routine called when the driver is
8005  * loaded. All it does is register with the PCI subsystem.
8006  **/
8007 static int __init ixgbe_init_module(void)
8008 {
8009         int ret;
8010         pr_info("%s - version %s\n", ixgbe_driver_string, ixgbe_driver_version);
8011         pr_info("%s\n", ixgbe_copyright);
8012
8013 #ifdef CONFIG_IXGBE_DCA
8014         dca_register_notify(&dca_notifier);
8015 #endif
8016
8017         ret = pci_register_driver(&ixgbe_driver);
8018         return ret;
8019 }
8020
8021 module_init(ixgbe_init_module);
8022
8023 /**
8024  * ixgbe_exit_module - Driver Exit Cleanup Routine
8025  *
8026  * ixgbe_exit_module is called just before the driver is removed
8027  * from memory.
8028  **/
8029 static void __exit ixgbe_exit_module(void)
8030 {
8031 #ifdef CONFIG_IXGBE_DCA
8032         dca_unregister_notify(&dca_notifier);
8033 #endif
8034         pci_unregister_driver(&ixgbe_driver);
8035         rcu_barrier(); /* Wait for completion of call_rcu()'s */
8036 }
8037
8038 #ifdef CONFIG_IXGBE_DCA
8039 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
8040                             void *p)
8041 {
8042         int ret_val;
8043
8044         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
8045                                          __ixgbe_notify_dca);
8046
8047         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
8048 }
8049
8050 #endif /* CONFIG_IXGBE_DCA */
8051
8052 module_exit(ixgbe_exit_module);
8053
8054 /* ixgbe_main.c */