drivers/net/ixgbe/ixgbe_main.c

   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2010 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/ip.h>
  36 #include <linux/tcp.h>
  37 #include <linux/pkt_sched.h>
  38 #include <linux/ipv6.h>
  39 #include <linux/slab.h>
  40 #include <net/checksum.h>
  41 #include <net/ip6_checksum.h>
  42 #include <linux/ethtool.h>
  43 #include <linux/if_vlan.h>
  44 #include <scsi/fc/fc_fcoe.h>
  45
  46 #include "ixgbe.h"
  47 #include "ixgbe_common.h"
  48 #include "ixgbe_dcb_82599.h"
  49 #include "ixgbe_sriov.h"
  50
  51 char ixgbe_driver_name[] = "ixgbe";
  52 static const char ixgbe_driver_string[] =
  53                               "Intel(R) 10 Gigabit PCI Express Network Driver";
  54
  55 #define DRV_VERSION "2.0.84-k2"
  56 const char ixgbe_driver_version[] = DRV_VERSION;
  57 static char ixgbe_copyright[] = "Copyright (c) 1999-2010 Intel Corporation.";
  58
  59 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  60         [board_82598] = &ixgbe_82598_info,
  61         [board_82599] = &ixgbe_82599_info,
  62 };
  63
  64 /* ixgbe_pci_tbl - PCI Device ID Table
  65  *
  66  * Wildcard entries (PCI_ANY_ID) should come last
  67  * Last entry must be all 0s
  68  *
  69  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  70  *   Class, Class Mask, private data (not used) }
  71  */
  72 static DEFINE_PCI_DEVICE_TABLE(ixgbe_pci_tbl) = {
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598),
  74          board_82598 },
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  76          board_82598 },
  77         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  78          board_82598 },
  79         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT),
  80          board_82598 },
  81         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT2),
  82          board_82598 },
  83         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  84          board_82598 },
  85         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_CX4_DUAL_PORT),
  86          board_82598 },
  87         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_DA_DUAL_PORT),
  88          board_82598 },
  89         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_SR_DUAL_PORT_EM),
  90          board_82598 },
  91         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_XF_LR),
  92          board_82598 },
  93         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_SFP_LOM),
  94          board_82598 },
  95         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598_BX),
  96          board_82598 },
  97         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4),
  98          board_82599 },
  99         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_XAUI_LOM),
 100          board_82599 },
 101         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KR),
 102          board_82599 },
 103         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP),
 104          board_82599 },
 105         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_SFP_EM),
 106          board_82599 },
 107         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_KX4_MEZZ),
 108          board_82599 },
 109         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_CX4),
 110          board_82599 },
 111         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_T3_LOM),
 112          board_82599 },
 113         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82599_COMBO_BACKPLANE),
 114          board_82599 },
 115
 116         /* required last entry */
 117         {0, }
 118 };
 119 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
 120
 121 #ifdef CONFIG_IXGBE_DCA
 122 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
 123                             void *p);
 124 static struct notifier_block dca_notifier = {
 125         .notifier_call = ixgbe_notify_dca,
 126         .next          = NULL,
 127         .priority      = 0
 128 };
 129 #endif
 130
 131 #ifdef CONFIG_PCI_IOV
 132 static unsigned int max_vfs;
 133 module_param(max_vfs, uint, 0);
 134 MODULE_PARM_DESC(max_vfs, "Maximum number of virtual functions to allocate "
 135                  "per physical function");
 136 #endif /* CONFIG_PCI_IOV */
 137
 138 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
 139 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
 140 MODULE_LICENSE("GPL");
 141 MODULE_VERSION(DRV_VERSION);
 142
 143 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
 144
 145 static inline void ixgbe_disable_sriov(struct ixgbe_adapter *adapter)
 146 {
 147         struct ixgbe_hw *hw = &adapter->hw;
 148         u32 gcr;
 149         u32 gpie;
 150         u32 vmdctl;
 151
 152 #ifdef CONFIG_PCI_IOV
 153         /* disable iov and allow time for transactions to clear */
 154         pci_disable_sriov(adapter->pdev);
 155 #endif
 156
 157         /* turn off device IOV mode */
 158         gcr = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
 159         gcr &= ~(IXGBE_GCR_EXT_SRIOV);
 160         IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr);
 161         gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
 162         gpie &= ~IXGBE_GPIE_VTMODE_MASK;
 163         IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
 164
 165         /* set default pool back to 0 */
 166         vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
 167         vmdctl &= ~IXGBE_VT_CTL_POOL_MASK;
 168         IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl);
 169
 170         /* take a breather then clean up driver data */
 171         msleep(100);
 172         if (adapter->vfinfo)
 173                 kfree(adapter->vfinfo);
 174         adapter->vfinfo = NULL;
 175
 176         adapter->num_vfs = 0;
 177         adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
 178 }
 179
 180 struct ixgbe_reg_info {
 181         u32 ofs;
 182         char *name;
 183 };
 184
 185 static const struct ixgbe_reg_info ixgbe_reg_info_tbl[] = {
 186
 187         /* General Registers */
 188         {IXGBE_CTRL, "CTRL"},
 189         {IXGBE_STATUS, "STATUS"},
 190         {IXGBE_CTRL_EXT, "CTRL_EXT"},
 191
 192         /* Interrupt Registers */
 193         {IXGBE_EICR, "EICR"},
 194
 195         /* RX Registers */
 196         {IXGBE_SRRCTL(0), "SRRCTL"},
 197         {IXGBE_DCA_RXCTRL(0), "DRXCTL"},
 198         {IXGBE_RDLEN(0), "RDLEN"},
 199         {IXGBE_RDH(0), "RDH"},
 200         {IXGBE_RDT(0), "RDT"},
 201         {IXGBE_RXDCTL(0), "RXDCTL"},
 202         {IXGBE_RDBAL(0), "RDBAL"},
 203         {IXGBE_RDBAH(0), "RDBAH"},
 204
 205         /* TX Registers */
 206         {IXGBE_TDBAL(0), "TDBAL"},
 207         {IXGBE_TDBAH(0), "TDBAH"},
 208         {IXGBE_TDLEN(0), "TDLEN"},
 209         {IXGBE_TDH(0), "TDH"},
 210         {IXGBE_TDT(0), "TDT"},
 211         {IXGBE_TXDCTL(0), "TXDCTL"},
 212
 213         /* List Terminator */
 214         {}
 215 };
 216
 217
 218 /*
 219  * ixgbe_regdump - register printout routine
 220  */
 221 static void ixgbe_regdump(struct ixgbe_hw *hw, struct ixgbe_reg_info *reginfo)
 222 {
 223         int i = 0, j = 0;
 224         char rname[16];
 225         u32 regs[64];
 226
 227         switch (reginfo->ofs) {
 228         case IXGBE_SRRCTL(0):
 229                 for (i = 0; i < 64; i++)
 230                         regs[i] = IXGBE_READ_REG(hw, IXGBE_SRRCTL(i));
 231                 break;
 232         case IXGBE_DCA_RXCTRL(0):
 233                 for (i = 0; i < 64; i++)
 234                         regs[i] = IXGBE_READ_REG(hw, IXGBE_DCA_RXCTRL(i));
 235                 break;
 236         case IXGBE_RDLEN(0):
 237                 for (i = 0; i < 64; i++)
 238                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDLEN(i));
 239                 break;
 240         case IXGBE_RDH(0):
 241                 for (i = 0; i < 64; i++)
 242                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDH(i));
 243                 break;
 244         case IXGBE_RDT(0):
 245                 for (i = 0; i < 64; i++)
 246                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDT(i));
 247                 break;
 248         case IXGBE_RXDCTL(0):
 249                 for (i = 0; i < 64; i++)
 250                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RXDCTL(i));
 251                 break;
 252         case IXGBE_RDBAL(0):
 253                 for (i = 0; i < 64; i++)
 254                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAL(i));
 255                 break;
 256         case IXGBE_RDBAH(0):
 257                 for (i = 0; i < 64; i++)
 258                         regs[i] = IXGBE_READ_REG(hw, IXGBE_RDBAH(i));
 259                 break;
 260         case IXGBE_TDBAL(0):
 261                 for (i = 0; i < 64; i++)
 262                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAL(i));
 263                 break;
 264         case IXGBE_TDBAH(0):
 265                 for (i = 0; i < 64; i++)
 266                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDBAH(i));
 267                 break;
 268         case IXGBE_TDLEN(0):
 269                 for (i = 0; i < 64; i++)
 270                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDLEN(i));
 271                 break;
 272         case IXGBE_TDH(0):
 273                 for (i = 0; i < 64; i++)
 274                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDH(i));
 275                 break;
 276         case IXGBE_TDT(0):
 277                 for (i = 0; i < 64; i++)
 278                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TDT(i));
 279                 break;
 280         case IXGBE_TXDCTL(0):
 281                 for (i = 0; i < 64; i++)
 282                         regs[i] = IXGBE_READ_REG(hw, IXGBE_TXDCTL(i));
 283                 break;
 284         default:
 285                 printk(KERN_INFO "%-15s %08x\n", reginfo->name,
 286                         IXGBE_READ_REG(hw, reginfo->ofs));
 287                 return;
 288         }
 289
 290         for (i = 0; i < 8; i++) {
 291                 snprintf(rname, 16, "%s[%d-%d]", reginfo->name, i*8, i*8+7);
 292                 printk(KERN_ERR "%-15s ", rname);
 293                 for (j = 0; j < 8; j++)
 294                         printk(KERN_CONT "%08x ", regs[i*8+j]);
 295                 printk(KERN_CONT "\n");
 296         }
 297
 298 }
 299
 300 /*
 301  * ixgbe_dump - Print registers, tx-rings and rx-rings
 302  */
 303 static void ixgbe_dump(struct ixgbe_adapter *adapter)
 304 {
 305         struct net_device *netdev = adapter->netdev;
 306         struct ixgbe_hw *hw = &adapter->hw;
 307         struct ixgbe_reg_info *reginfo;
 308         int n = 0;
 309         struct ixgbe_ring *tx_ring;
 310         struct ixgbe_tx_buffer *tx_buffer_info;
 311         union ixgbe_adv_tx_desc *tx_desc;
 312         struct my_u0 { u64 a; u64 b; } *u0;
 313         struct ixgbe_ring *rx_ring;
 314         union ixgbe_adv_rx_desc *rx_desc;
 315         struct ixgbe_rx_buffer *rx_buffer_info;
 316         u32 staterr;
 317         int i = 0;
 318
 319         if (!netif_msg_hw(adapter))
 320                 return;
 321
 322         /* Print netdevice Info */
 323         if (netdev) {
 324                 dev_info(&adapter->pdev->dev, "Net device Info\n");
 325                 printk(KERN_INFO "Device Name     state            "
 326                         "trans_start      last_rx\n");
 327                 printk(KERN_INFO "%-15s %016lX %016lX %016lX\n",
 328                 netdev->name,
 329                 netdev->state,
 330                 netdev->trans_start,
 331                 netdev->last_rx);
 332         }
 333
 334         /* Print Registers */
 335         dev_info(&adapter->pdev->dev, "Register Dump\n");
 336         printk(KERN_INFO " Register Name   Value\n");
 337         for (reginfo = (struct ixgbe_reg_info *)ixgbe_reg_info_tbl;
 338              reginfo->name; reginfo++) {
 339                 ixgbe_regdump(hw, reginfo);
 340         }
 341
 342         /* Print TX Ring Summary */
 343         if (!netdev || !netif_running(netdev))
 344                 goto exit;
 345
 346         dev_info(&adapter->pdev->dev, "TX Rings Summary\n");
 347         printk(KERN_INFO "Queue [NTU] [NTC] [bi(ntc)->dma  ] "
 348                 "leng ntw timestamp\n");
 349         for (n = 0; n < adapter->num_tx_queues; n++) {
 350                 tx_ring = adapter->tx_ring[n];
 351                 tx_buffer_info =
 352                         &tx_ring->tx_buffer_info[tx_ring->next_to_clean];
 353                 printk(KERN_INFO " %5d %5X %5X %016llX %04X %3X %016llX\n",
 354                            n, tx_ring->next_to_use, tx_ring->next_to_clean,
 355                            (u64)tx_buffer_info->dma,
 356                            tx_buffer_info->length,
 357                            tx_buffer_info->next_to_watch,
 358                            (u64)tx_buffer_info->time_stamp);
 359         }
 360
 361         /* Print TX Rings */
 362         if (!netif_msg_tx_done(adapter))
 363                 goto rx_ring_summary;
 364
 365         dev_info(&adapter->pdev->dev, "TX Rings Dump\n");
 366
 367         /* Transmit Descriptor Formats
 368          *
 369          * Advanced Transmit Descriptor
 370          *   +--------------------------------------------------------------+
 371          * 0 |         Buffer Address [63:0]                                |
 372          *   +--------------------------------------------------------------+
 373          * 8 |  PAYLEN  | PORTS  | IDX | STA | DCMD  |DTYP |  RSV |  DTALEN |
 374          *   +--------------------------------------------------------------+
 375          *   63       46 45    40 39 36 35 32 31   24 23 20 19              0
 376          */
 377
 378         for (n = 0; n < adapter->num_tx_queues; n++) {
 379                 tx_ring = adapter->tx_ring[n];
 380                 printk(KERN_INFO "------------------------------------\n");
 381                 printk(KERN_INFO "TX QUEUE INDEX = %d\n", tx_ring->queue_index);
 382                 printk(KERN_INFO "------------------------------------\n");
 383                 printk(KERN_INFO "T [desc]     [address 63:0  ] "
 384                         "[PlPOIdStDDt Ln] [bi->dma       ] "
 385                         "leng  ntw timestamp        bi->skb\n");
 386
 387                 for (i = 0; tx_ring->desc && (i < tx_ring->count); i++) {
 388                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 389                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 390                         u0 = (struct my_u0 *)tx_desc;
 391                         printk(KERN_INFO "T [0x%03X]    %016llX %016llX %016llX"
 392                                 " %04X  %3X %016llX %p", i,
 393                                 le64_to_cpu(u0->a),
 394                                 le64_to_cpu(u0->b),
 395                                 (u64)tx_buffer_info->dma,
 396                                 tx_buffer_info->length,
 397                                 tx_buffer_info->next_to_watch,
 398                                 (u64)tx_buffer_info->time_stamp,
 399                                 tx_buffer_info->skb);
 400                         if (i == tx_ring->next_to_use &&
 401                                 i == tx_ring->next_to_clean)
 402                                 printk(KERN_CONT " NTC/U\n");
 403                         else if (i == tx_ring->next_to_use)
 404                                 printk(KERN_CONT " NTU\n");
 405                         else if (i == tx_ring->next_to_clean)
 406                                 printk(KERN_CONT " NTC\n");
 407                         else
 408                                 printk(KERN_CONT "\n");
 409
 410                         if (netif_msg_pktdata(adapter) &&
 411                                 tx_buffer_info->dma != 0)
 412                                 print_hex_dump(KERN_INFO, "",
 413                                         DUMP_PREFIX_ADDRESS, 16, 1,
 414                                         phys_to_virt(tx_buffer_info->dma),
 415                                         tx_buffer_info->length, true);
 416                 }
 417         }
 418
 419         /* Print RX Rings Summary */
 420 rx_ring_summary:
 421         dev_info(&adapter->pdev->dev, "RX Rings Summary\n");
 422         printk(KERN_INFO "Queue [NTU] [NTC]\n");
 423         for (n = 0; n < adapter->num_rx_queues; n++) {
 424                 rx_ring = adapter->rx_ring[n];
 425                 printk(KERN_INFO "%5d %5X %5X\n", n,
 426                            rx_ring->next_to_use, rx_ring->next_to_clean);
 427         }
 428
 429         /* Print RX Rings */
 430         if (!netif_msg_rx_status(adapter))
 431                 goto exit;
 432
 433         dev_info(&adapter->pdev->dev, "RX Rings Dump\n");
 434
 435         /* Advanced Receive Descriptor (Read) Format
 436          *    63                                           1        0
 437          *    +-----------------------------------------------------+
 438          *  0 |       Packet Buffer Address [63:1]           |A0/NSE|
 439          *    +----------------------------------------------+------+
 440          *  8 |       Header Buffer Address [63:1]           |  DD  |
 441          *    +-----------------------------------------------------+
 442          *
 443          *
 444          * Advanced Receive Descriptor (Write-Back) Format
 445          *
 446          *   63       48 47    32 31  30      21 20 16 15   4 3     0
 447          *   +------------------------------------------------------+
 448          * 0 | Packet     IP     |SPH| HDR_LEN   | RSV|Packet|  RSS |
 449          *   | Checksum   Ident  |   |           |    | Type | Type |
 450          *   +------------------------------------------------------+
 451          * 8 | VLAN Tag | Length | Extended Error | Extended Status |
 452          *   +------------------------------------------------------+
 453          *   63       48 47    32 31            20 19               0
 454          */
 455         for (n = 0; n < adapter->num_rx_queues; n++) {
 456                 rx_ring = adapter->rx_ring[n];
 457                 printk(KERN_INFO "------------------------------------\n");
 458                 printk(KERN_INFO "RX QUEUE INDEX = %d\n", rx_ring->queue_index);
 459                 printk(KERN_INFO "------------------------------------\n");
 460                 printk(KERN_INFO "R  [desc]      [ PktBuf     A0] "
 461                         "[  HeadBuf   DD] [bi->dma       ] [bi->skb] "
 462                         "<-- Adv Rx Read format\n");
 463                 printk(KERN_INFO "RWB[desc]      [PcsmIpSHl PtRs] "
 464                         "[vl er S cks ln] ---------------- [bi->skb] "
 465                         "<-- Adv Rx Write-Back format\n");
 466
 467                 for (i = 0; i < rx_ring->count; i++) {
 468                         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 469                         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 470                         u0 = (struct my_u0 *)rx_desc;
 471                         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 472                         if (staterr & IXGBE_RXD_STAT_DD) {
 473                                 /* Descriptor Done */
 474                                 printk(KERN_INFO "RWB[0x%03X]     %016llX "
 475                                         "%016llX ---------------- %p", i,
 476                                         le64_to_cpu(u0->a),
 477                                         le64_to_cpu(u0->b),
 478                                         rx_buffer_info->skb);
 479                         } else {
 480                                 printk(KERN_INFO "R  [0x%03X]     %016llX "
 481                                         "%016llX %016llX %p", i,
 482                                         le64_to_cpu(u0->a),
 483                                         le64_to_cpu(u0->b),
 484                                         (u64)rx_buffer_info->dma,
 485                                         rx_buffer_info->skb);
 486
 487                                 if (netif_msg_pktdata(adapter)) {
 488                                         print_hex_dump(KERN_INFO, "",
 489                                            DUMP_PREFIX_ADDRESS, 16, 1,
 490                                            phys_to_virt(rx_buffer_info->dma),
 491                                            rx_ring->rx_buf_len, true);
 492
 493                                         if (rx_ring->rx_buf_len
 494                                                 < IXGBE_RXBUFFER_2048)
 495                                                 print_hex_dump(KERN_INFO, "",
 496                                                   DUMP_PREFIX_ADDRESS, 16, 1,
 497                                                   phys_to_virt(
 498                                                     rx_buffer_info->page_dma +
 499                                                     rx_buffer_info->page_offset
 500                                                   ),
 501                                                   PAGE_SIZE/2, true);
 502                                 }
 503                         }
 504
 505                         if (i == rx_ring->next_to_use)
 506                                 printk(KERN_CONT " NTU\n");
 507                         else if (i == rx_ring->next_to_clean)
 508                                 printk(KERN_CONT " NTC\n");
 509                         else
 510                                 printk(KERN_CONT "\n");
 511
 512                 }
 513         }
 514
 515 exit:
 516         return;
 517 }
 518
 519 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 520 {
 521         u32 ctrl_ext;
 522
 523         /* Let firmware take over control of h/w */
 524         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 525         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 526                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 527 }
 528
 529 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 530 {
 531         u32 ctrl_ext;
 532
 533         /* Let firmware know the driver has taken over */
 534         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 535         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 536                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 537 }
 538
 539 /*
 540  * ixgbe_set_ivar - set the IVAR registers, mapping interrupt causes to vectors
 541  * @adapter: pointer to adapter struct
 542  * @direction: 0 for Rx, 1 for Tx, -1 for other causes
 543  * @queue: queue to map the corresponding interrupt to
 544  * @msix_vector: the vector to map to the corresponding queue
 545  *
 546  */
 547 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, s8 direction,
 548                            u8 queue, u8 msix_vector)
 549 {
 550         u32 ivar, index;
 551         struct ixgbe_hw *hw = &adapter->hw;
 552         switch (hw->mac.type) {
 553         case ixgbe_mac_82598EB:
 554                 msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 555                 if (direction == -1)
 556                         direction = 0;
 557                 index = (((direction * 64) + queue) >> 2) & 0x1F;
 558                 ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(index));
 559                 ivar &= ~(0xFF << (8 * (queue & 0x3)));
 560                 ivar |= (msix_vector << (8 * (queue & 0x3)));
 561                 IXGBE_WRITE_REG(hw, IXGBE_IVAR(index), ivar);
 562                 break;
 563         case ixgbe_mac_82599EB:
 564                 if (direction == -1) {
 565                         /* other causes */
 566                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 567                         index = ((queue & 1) * 8);
 568                         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR_MISC);
 569                         ivar &= ~(0xFF << index);
 570                         ivar |= (msix_vector << index);
 571                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR_MISC, ivar);
 572                         break;
 573                 } else {
 574                         /* tx or rx causes */
 575                         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 576                         index = ((16 * (queue & 1)) + (8 * direction));
 577                         ivar = IXGBE_READ_REG(hw, IXGBE_IVAR(queue >> 1));
 578                         ivar &= ~(0xFF << index);
 579                         ivar |= (msix_vector << index);
 580                         IXGBE_WRITE_REG(hw, IXGBE_IVAR(queue >> 1), ivar);
 581                         break;
 582                 }
 583         default:
 584                 break;
 585         }
 586 }
 587
 588 static inline void ixgbe_irq_rearm_queues(struct ixgbe_adapter *adapter,
 589                                           u64 qmask)
 590 {
 591         u32 mask;
 592
 593         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 594                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
 595                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, mask);
 596         } else {
 597                 mask = (qmask & 0xFFFFFFFF);
 598                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(0), mask);
 599                 mask = (qmask >> 32);
 600                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS_EX(1), mask);
 601         }
 602 }
 603
 604 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 605                                              struct ixgbe_tx_buffer
 606                                              *tx_buffer_info)
 607 {
 608         if (tx_buffer_info->dma) {
 609                 if (tx_buffer_info->mapped_as_page)
 610                         dma_unmap_page(&adapter->pdev->dev,
 611                                        tx_buffer_info->dma,
 612                                        tx_buffer_info->length,
 613                                        DMA_TO_DEVICE);
 614                 else
 615                         dma_unmap_single(&adapter->pdev->dev,
 616                                          tx_buffer_info->dma,
 617                                          tx_buffer_info->length,
 618                                          DMA_TO_DEVICE);
 619                 tx_buffer_info->dma = 0;
 620         }
 621         if (tx_buffer_info->skb) {
 622                 dev_kfree_skb_any(tx_buffer_info->skb);
 623                 tx_buffer_info->skb = NULL;
 624         }
 625         tx_buffer_info->time_stamp = 0;
 626         /* tx_buffer_info must be completely set up in the transmit path */
 627 }
 628
 629 /**
 630  * ixgbe_tx_xon_state - check the tx ring xon state
 631  * @adapter: the ixgbe adapter
 632  * @tx_ring: the corresponding tx_ring
 633  *
 634  * If not in DCB mode, checks TFCS.TXOFF, otherwise, find out the
 635  * corresponding TC of this tx_ring when checking TFCS.
 636  *
 637  * Returns : true if in xon state (currently not paused)
 638  */
 639 static inline bool ixgbe_tx_xon_state(struct ixgbe_adapter *adapter,
 640                                       struct ixgbe_ring *tx_ring)
 641 {
 642         u32 txoff = IXGBE_TFCS_TXOFF;
 643
 644 #ifdef CONFIG_IXGBE_DCB
 645         if (adapter->dcb_cfg.pfc_mode_enable) {
 646                 int tc;
 647                 int reg_idx = tx_ring->reg_idx;
 648                 int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
 649
 650                 switch (adapter->hw.mac.type) {
 651                 case ixgbe_mac_82598EB:
 652                         tc = reg_idx >> 2;
 653                         txoff = IXGBE_TFCS_TXOFF0;
 654                         break;
 655                 case ixgbe_mac_82599EB:
 656                         tc = 0;
 657                         txoff = IXGBE_TFCS_TXOFF;
 658                         if (dcb_i == 8) {
 659                                 /* TC0, TC1 */
 660                                 tc = reg_idx >> 5;
 661                                 if (tc == 2) /* TC2, TC3 */
 662                                         tc += (reg_idx - 64) >> 4;
 663                                 else if (tc == 3) /* TC4, TC5, TC6, TC7 */
 664                                         tc += 1 + ((reg_idx - 96) >> 3);
 665                         } else if (dcb_i == 4) {
 666                                 /* TC0, TC1 */
 667                                 tc = reg_idx >> 6;
 668                                 if (tc == 1) {
 669                                         tc += (reg_idx - 64) >> 5;
 670                                         if (tc == 2) /* TC2, TC3 */
 671                                                 tc += (reg_idx - 96) >> 4;
 672                                 }
 673                         }
 674                         break;
 675                 default:
 676                         tc = 0;
 677                 }
 678                 txoff <<= tc;
 679         }
 680 #endif
 681         return IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & txoff;
 682 }
 683
 684 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 685                                        struct ixgbe_ring *tx_ring,
 686                                        unsigned int eop)
 687 {
 688         struct ixgbe_hw *hw = &adapter->hw;
 689
 690         /* Detect a transmit hang in hardware, this serializes the
 691          * check with the clearing of time_stamp and movement of eop */
 692         adapter->detect_tx_hung = false;
 693         if (tx_ring->tx_buffer_info[eop].time_stamp &&
 694             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 695             ixgbe_tx_xon_state(adapter, tx_ring)) {
 696                 /* detected Tx unit hang */
 697                 union ixgbe_adv_tx_desc *tx_desc;
 698                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 699                 e_err(drv, "Detected Tx Unit Hang\n"
 700                       "  Tx Queue             <%d>\n"
 701                       "  TDH, TDT             <%x>, <%x>\n"
 702                       "  next_to_use          <%x>\n"
 703                       "  next_to_clean        <%x>\n"
 704                       "tx_buffer_info[next_to_clean]\n"
 705                       "  time_stamp           <%lx>\n"
 706                       "  jiffies              <%lx>\n",
 707                       tx_ring->queue_index,
 708                       IXGBE_READ_REG(hw, tx_ring->head),
 709                       IXGBE_READ_REG(hw, tx_ring->tail),
 710                       tx_ring->next_to_use, eop,
 711                       tx_ring->tx_buffer_info[eop].time_stamp, jiffies);
 712                 return true;
 713         }
 714
 715         return false;
 716 }
 717
 718 #define IXGBE_MAX_TXD_PWR       14
 719 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 720
 721 /* Tx Descriptors needed, worst case */
 722 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 723                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 724 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 725         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1) /* for context */
 726
 727 static void ixgbe_tx_timeout(struct net_device *netdev);
 728
 729 /**
 730  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 731  * @q_vector: structure containing interrupt and ring information
 732  * @tx_ring: tx ring to clean
 733  **/
 734 static bool ixgbe_clean_tx_irq(struct ixgbe_q_vector *q_vector,
 735                                struct ixgbe_ring *tx_ring)
 736 {
 737         struct ixgbe_adapter *adapter = q_vector->adapter;
 738         struct net_device *netdev = adapter->netdev;
 739         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 740         struct ixgbe_tx_buffer *tx_buffer_info;
 741         unsigned int i, eop, count = 0;
 742         unsigned int total_bytes = 0, total_packets = 0;
 743
 744         i = tx_ring->next_to_clean;
 745         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 746         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 747
 748         while ((eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) &&
 749                (count < tx_ring->work_limit)) {
 750                 bool cleaned = false;
 751                 rmb(); /* read buffer_info after eop_desc */
 752                 for ( ; !cleaned; count++) {
 753                         struct sk_buff *skb;
 754                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 755                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 756                         cleaned = (i == eop);
 757                         skb = tx_buffer_info->skb;
 758
 759                         if (cleaned && skb) {
 760                                 unsigned int segs, bytecount;
 761                                 unsigned int hlen = skb_headlen(skb);
 762
 763                                 /* gso_segs is currently only valid for tcp */
 764                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 765 #ifdef IXGBE_FCOE
 766                                 /* adjust for FCoE Sequence Offload */
 767                                 if ((adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
 768                                     && (skb->protocol == htons(ETH_P_FCOE)) &&
 769                                     skb_is_gso(skb)) {
 770                                         hlen = skb_transport_offset(skb) +
 771                                                 sizeof(struct fc_frame_header) +
 772                                                 sizeof(struct fcoe_crc_eof);
 773                                         segs = DIV_ROUND_UP(skb->len - hlen,
 774                                                 skb_shinfo(skb)->gso_size);
 775                                 }
 776 #endif /* IXGBE_FCOE */
 777                                 /* multiply data chunks by size of headers */
 778                                 bytecount = ((segs - 1) * hlen) + skb->len;
 779                                 total_packets += segs;
 780                                 total_bytes += bytecount;
 781                         }
 782
 783                         ixgbe_unmap_and_free_tx_resource(adapter,
 784                                                          tx_buffer_info);
 785
 786                         tx_desc->wb.status = 0;
 787
 788                         i++;
 789                         if (i == tx_ring->count)
 790                                 i = 0;
 791                 }
 792
 793                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 794                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 795         }
 796
 797         tx_ring->next_to_clean = i;
 798
 799 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 800         if (unlikely(count && netif_carrier_ok(netdev) &&
 801                      (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD))) {
 802                 /* Make sure that anybody stopping the queue after this
 803                  * sees the new next_to_clean.
 804                  */
 805                 smp_mb();
 806                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 807                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 808                         netif_wake_subqueue(netdev, tx_ring->queue_index);
 809                         ++tx_ring->restart_queue;
 810                 }
 811         }
 812
 813         if (adapter->detect_tx_hung) {
 814                 if (ixgbe_check_tx_hang(adapter, tx_ring, i)) {
 815                         /* schedule immediate reset if we believe we hung */
 816                         e_info(probe, "tx hang %d detected, resetting "
 817                                "adapter\n", adapter->tx_timeout_count + 1);
 818                         ixgbe_tx_timeout(adapter->netdev);
 819                 }
 820         }
 821
 822         /* re-arm the interrupt */
 823         if (count >= tx_ring->work_limit)
 824                 ixgbe_irq_rearm_queues(adapter, ((u64)1 << q_vector->v_idx));
 825
 826         tx_ring->total_bytes += total_bytes;
 827         tx_ring->total_packets += total_packets;
 828         tx_ring->stats.packets += total_packets;
 829         tx_ring->stats.bytes += total_bytes;
 830         return (count < tx_ring->work_limit);
 831 }
 832
 833 #ifdef CONFIG_IXGBE_DCA
 834 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
 835                                 struct ixgbe_ring *rx_ring)
 836 {
 837         u32 rxctrl;
 838         int cpu = get_cpu();
 839         int q = rx_ring->reg_idx;
 840
 841         if (rx_ring->cpu != cpu) {
 842                 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
 843                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 844                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 845                         rxctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 846                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 847                         rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK_82599;
 848                         rxctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 849                                    IXGBE_DCA_RXCTRL_CPUID_SHIFT_82599);
 850                 }
 851                 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 852                 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 853                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_RRO_EN);
 854                 rxctrl &= ~(IXGBE_DCA_RXCTRL_DESC_WRO_EN |
 855                             IXGBE_DCA_RXCTRL_DESC_HSRO_EN);
 856                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
 857                 rx_ring->cpu = cpu;
 858         }
 859         put_cpu();
 860 }
 861
 862 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 863                                 struct ixgbe_ring *tx_ring)
 864 {
 865         u32 txctrl;
 866         int cpu = get_cpu();
 867         int q = tx_ring->reg_idx;
 868         struct ixgbe_hw *hw = &adapter->hw;
 869
 870         if (tx_ring->cpu != cpu) {
 871                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
 872                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(q));
 873                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 874                         txctrl |= dca3_get_tag(&adapter->pdev->dev, cpu);
 875                         txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 876                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(q), txctrl);
 877                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
 878                         txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL_82599(q));
 879                         txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK_82599;
 880                         txctrl |= (dca3_get_tag(&adapter->pdev->dev, cpu) <<
 881                                   IXGBE_DCA_TXCTRL_CPUID_SHIFT_82599);
 882                         txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 883                         IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL_82599(q), txctrl);
 884                 }
 885                 tx_ring->cpu = cpu;
 886         }
 887         put_cpu();
 888 }
 889
 890 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
 891 {
 892         int i;
 893
 894         if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
 895                 return;
 896
 897         /* always use CB2 mode, difference is masked in the CB driver */
 898         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
 899
 900         for (i = 0; i < adapter->num_tx_queues; i++) {
 901                 adapter->tx_ring[i]->cpu = -1;
 902                 ixgbe_update_tx_dca(adapter, adapter->tx_ring[i]);
 903         }
 904         for (i = 0; i < adapter->num_rx_queues; i++) {
 905                 adapter->rx_ring[i]->cpu = -1;
 906                 ixgbe_update_rx_dca(adapter, adapter->rx_ring[i]);
 907         }
 908 }
 909
 910 static int __ixgbe_notify_dca(struct device *dev, void *data)
 911 {
 912         struct net_device *netdev = dev_get_drvdata(dev);
 913         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 914         unsigned long event = *(unsigned long *)data;
 915
 916         switch (event) {
 917         case DCA_PROVIDER_ADD:
 918                 /* if we're already enabled, don't do it again */
 919                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 920                         break;
 921                 if (dca_add_requester(dev) == 0) {
 922                         adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
 923                         ixgbe_setup_dca(adapter);
 924                         break;
 925                 }
 926                 /* Fall Through since DCA is disabled. */
 927         case DCA_PROVIDER_REMOVE:
 928                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
 929                         dca_remove_requester(dev);
 930                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
 931                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
 932                 }
 933                 break;
 934         }
 935
 936         return 0;
 937 }
 938
 939 #endif /* CONFIG_IXGBE_DCA */
 940 /**
 941  * ixgbe_receive_skb - Send a completed packet up the stack
 942  * @adapter: board private structure
 943  * @skb: packet to send up
 944  * @status: hardware indication of status of receive
 945  * @rx_ring: rx descriptor ring (for a specific queue) to setup
 946  * @rx_desc: rx descriptor
 947  **/
 948 static void ixgbe_receive_skb(struct ixgbe_q_vector *q_vector,
 949                               struct sk_buff *skb, u8 status,
 950                               struct ixgbe_ring *ring,
 951                               union ixgbe_adv_rx_desc *rx_desc)
 952 {
 953         struct ixgbe_adapter *adapter = q_vector->adapter;
 954         struct napi_struct *napi = &q_vector->napi;
 955         bool is_vlan = (status & IXGBE_RXD_STAT_VP);
 956         u16 tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 957
 958         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 959                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 960                         vlan_gro_receive(napi, adapter->vlgrp, tag, skb);
 961                 else
 962                         napi_gro_receive(napi, skb);
 963         } else {
 964                 if (adapter->vlgrp && is_vlan && (tag & VLAN_VID_MASK))
 965                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 966                 else
 967                         netif_rx(skb);
 968         }
 969 }
 970
 971 /**
 972  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 973  * @adapter: address of board private structure
 974  * @status_err: hardware indication of status of receive
 975  * @skb: skb currently being received and modified
 976  **/
 977 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 978                                      union ixgbe_adv_rx_desc *rx_desc,
 979                                      struct sk_buff *skb)
 980 {
 981         u32 status_err = le32_to_cpu(rx_desc->wb.upper.status_error);
 982
 983         skb->ip_summed = CHECKSUM_NONE;
 984
 985         /* Rx csum disabled */
 986         if (!(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 987                 return;
 988
 989         /* if IP and error */
 990         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 991             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 992                 adapter->hw_csum_rx_error++;
 993                 return;
 994         }
 995
 996         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 997                 return;
 998
 999         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
1000                 u16 pkt_info = rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1001
1002                 /*
1003                  * 82599 errata, UDP frames with a 0 checksum can be marked as
1004                  * checksum errors.
1005                  */
1006                 if ((pkt_info & IXGBE_RXDADV_PKTTYPE_UDP) &&
1007                     (adapter->hw.mac.type == ixgbe_mac_82599EB))
1008                         return;
1009
1010                 adapter->hw_csum_rx_error++;
1011                 return;
1012         }
1013
1014         /* It must be a TCP or UDP packet with a valid checksum */
1015         skb->ip_summed = CHECKSUM_UNNECESSARY;
1016 }
1017
1018 static inline void ixgbe_release_rx_desc(struct ixgbe_hw *hw,
1019                                          struct ixgbe_ring *rx_ring, u32 val)
1020 {
1021         /*
1022          * Force memory writes to complete before letting h/w
1023          * know there are new descriptors to fetch.  (Only
1024          * applicable for weak-ordered memory model archs,
1025          * such as IA-64).
1026          */
1027         wmb();
1028         IXGBE_WRITE_REG(hw, IXGBE_RDT(rx_ring->reg_idx), val);
1029 }
1030
1031 /**
1032  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
1033  * @adapter: address of board private structure
1034  **/
1035 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
1036                                    struct ixgbe_ring *rx_ring,
1037                                    int cleaned_count)
1038 {
1039         struct net_device *netdev = adapter->netdev;
1040         struct pci_dev *pdev = adapter->pdev;
1041         union ixgbe_adv_rx_desc *rx_desc;
1042         struct ixgbe_rx_buffer *bi;
1043         unsigned int i;
1044         unsigned int bufsz = rx_ring->rx_buf_len;
1045
1046         i = rx_ring->next_to_use;
1047         bi = &rx_ring->rx_buffer_info[i];
1048
1049         while (cleaned_count--) {
1050                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
1051
1052                 if (!bi->page_dma &&
1053                     (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)) {
1054                         if (!bi->page) {
1055                                 bi->page = netdev_alloc_page(netdev);
1056                                 if (!bi->page) {
1057                                         adapter->alloc_rx_page_failed++;
1058                                         goto no_buffers;
1059                                 }
1060                                 bi->page_offset = 0;
1061                         } else {
1062                                 /* use a half page if we're re-using */
1063                                 bi->page_offset ^= (PAGE_SIZE / 2);
1064                         }
1065
1066                         bi->page_dma = dma_map_page(&pdev->dev, bi->page,
1067                                                     bi->page_offset,
1068                                                     (PAGE_SIZE / 2),
1069                                                     DMA_FROM_DEVICE);
1070                 }
1071
1072                 if (!bi->skb) {
1073                         struct sk_buff *skb = netdev_alloc_skb_ip_align(netdev,
1074                                                                         bufsz);
1075                         bi->skb = skb;
1076
1077                         if (!skb) {
1078                                 adapter->alloc_rx_buff_failed++;
1079                                 goto no_buffers;
1080                         }
1081                         /* initialize queue mapping */
1082                         skb_record_rx_queue(skb, rx_ring->queue_index);
1083                 }
1084
1085                 if (!bi->dma) {
1086                         bi->dma = dma_map_single(&pdev->dev,
1087                                                  bi->skb->data,
1088                                                  rx_ring->rx_buf_len,
1089                                                  DMA_FROM_DEVICE);
1090                 }
1091                 /* Refresh the desc even if buffer_addrs didn't change because
1092                  * each write-back erases this info. */
1093                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1094                         rx_desc->read.pkt_addr = cpu_to_le64(bi->page_dma);
1095                         rx_desc->read.hdr_addr = cpu_to_le64(bi->dma);
1096                 } else {
1097                         rx_desc->read.pkt_addr = cpu_to_le64(bi->dma);
1098                 }
1099
1100                 i++;
1101                 if (i == rx_ring->count)
1102                         i = 0;
1103                 bi = &rx_ring->rx_buffer_info[i];
1104         }
1105
1106 no_buffers:
1107         if (rx_ring->next_to_use != i) {
1108                 rx_ring->next_to_use = i;
1109                 if (i-- == 0)
1110                         i = (rx_ring->count - 1);
1111
1112                 ixgbe_release_rx_desc(&adapter->hw, rx_ring, i);
1113         }
1114 }
1115
1116 static inline u16 ixgbe_get_hdr_info(union ixgbe_adv_rx_desc *rx_desc)
1117 {
1118         return rx_desc->wb.lower.lo_dword.hs_rss.hdr_info;
1119 }
1120
1121 static inline u16 ixgbe_get_pkt_info(union ixgbe_adv_rx_desc *rx_desc)
1122 {
1123         return rx_desc->wb.lower.lo_dword.hs_rss.pkt_info;
1124 }
1125
1126 static inline u32 ixgbe_get_rsc_count(union ixgbe_adv_rx_desc *rx_desc)
1127 {
1128         return (le32_to_cpu(rx_desc->wb.lower.lo_dword.data) &
1129                 IXGBE_RXDADV_RSCCNT_MASK) >>
1130                 IXGBE_RXDADV_RSCCNT_SHIFT;
1131 }
1132
1133 /**
1134  * ixgbe_transform_rsc_queue - change rsc queue into a full packet
1135  * @skb: pointer to the last skb in the rsc queue
1136  * @count: pointer to number of packets coalesced in this context
1137  *
1138  * This function changes a queue full of hw rsc buffers into a completed
1139  * packet.  It uses the ->prev pointers to find the first packet and then
1140  * turns it into the frag list owner.
1141  **/
1142 static inline struct sk_buff *ixgbe_transform_rsc_queue(struct sk_buff *skb,
1143                                                         u64 *count)
1144 {
1145         unsigned int frag_list_size = 0;
1146
1147         while (skb->prev) {
1148                 struct sk_buff *prev = skb->prev;
1149                 frag_list_size += skb->len;
1150                 skb->prev = NULL;
1151                 skb = prev;
1152                 *count += 1;
1153         }
1154
1155         skb_shinfo(skb)->frag_list = skb->next;
1156         skb->next = NULL;
1157         skb->len += frag_list_size;
1158         skb->data_len += frag_list_size;
1159         skb->truesize += frag_list_size;
1160         return skb;
1161 }
1162
1163 struct ixgbe_rsc_cb {
1164         dma_addr_t dma;
1165         bool delay_unmap;
1166 };
1167
1168 #define IXGBE_RSC_CB(skb) ((struct ixgbe_rsc_cb *)(skb)->cb)
1169
1170 static bool ixgbe_clean_rx_irq(struct ixgbe_q_vector *q_vector,
1171                                struct ixgbe_ring *rx_ring,
1172                                int *work_done, int work_to_do)
1173 {
1174         struct ixgbe_adapter *adapter = q_vector->adapter;
1175         struct net_device *netdev = adapter->netdev;
1176         struct pci_dev *pdev = adapter->pdev;
1177         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
1178         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
1179         struct sk_buff *skb;
1180         unsigned int i, rsc_count = 0;
1181         u32 len, staterr;
1182         u16 hdr_info;
1183         bool cleaned = false;
1184         int cleaned_count = 0;
1185         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
1186 #ifdef IXGBE_FCOE
1187         int ddp_bytes = 0;
1188 #endif /* IXGBE_FCOE */
1189
1190         i = rx_ring->next_to_clean;
1191         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
1192         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1193         rx_buffer_info = &rx_ring->rx_buffer_info[i];
1194
1195         while (staterr & IXGBE_RXD_STAT_DD) {
1196                 u32 upper_len = 0;
1197                 if (*work_done >= work_to_do)
1198                         break;
1199                 (*work_done)++;
1200
1201                 rmb(); /* read descriptor and rx_buffer_info after status DD */
1202                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1203                         hdr_info = le16_to_cpu(ixgbe_get_hdr_info(rx_desc));
1204                         len = (hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
1205                                IXGBE_RXDADV_HDRBUFLEN_SHIFT;
1206                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
1207                         if ((len > IXGBE_RX_HDR_SIZE) ||
1208                             (upper_len && !(hdr_info & IXGBE_RXDADV_SPH)))
1209                                 len = IXGBE_RX_HDR_SIZE;
1210                 } else {
1211                         len = le16_to_cpu(rx_desc->wb.upper.length);
1212                 }
1213
1214                 cleaned = true;
1215                 skb = rx_buffer_info->skb;
1216                 prefetch(skb->data);
1217                 rx_buffer_info->skb = NULL;
1218
1219                 if (rx_buffer_info->dma) {
1220                         if ((adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
1221                             (!(staterr & IXGBE_RXD_STAT_EOP)) &&
1222                                  (!(skb->prev))) {
1223                                 /*
1224                                  * When HWRSC is enabled, delay unmapping
1225                                  * of the first packet. It carries the
1226                                  * header information, HW may still
1227                                  * access the header after the writeback.
1228                                  * Only unmap it when EOP is reached
1229                                  */
1230                                 IXGBE_RSC_CB(skb)->delay_unmap = true;
1231                                 IXGBE_RSC_CB(skb)->dma = rx_buffer_info->dma;
1232                         } else {
1233                                 dma_unmap_single(&pdev->dev,
1234                                                  rx_buffer_info->dma,
1235                                                  rx_ring->rx_buf_len,
1236                                                  DMA_FROM_DEVICE);
1237                         }
1238                         rx_buffer_info->dma = 0;
1239                         skb_put(skb, len);
1240                 }
1241
1242                 if (upper_len) {
1243                         dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
1244                                        PAGE_SIZE / 2, DMA_FROM_DEVICE);
1245                         rx_buffer_info->page_dma = 0;
1246                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
1247                                            rx_buffer_info->page,
1248                                            rx_buffer_info->page_offset,
1249                                            upper_len);
1250
1251                         if ((rx_ring->rx_buf_len > (PAGE_SIZE / 2)) ||
1252                             (page_count(rx_buffer_info->page) != 1))
1253                                 rx_buffer_info->page = NULL;
1254                         else
1255                                 get_page(rx_buffer_info->page);
1256
1257                         skb->len += upper_len;
1258                         skb->data_len += upper_len;
1259                         skb->truesize += upper_len;
1260                 }
1261
1262                 i++;
1263                 if (i == rx_ring->count)
1264                         i = 0;
1265
1266                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
1267                 prefetch(next_rxd);
1268                 cleaned_count++;
1269
1270                 if (adapter->flags2 & IXGBE_FLAG2_RSC_CAPABLE)
1271                         rsc_count = ixgbe_get_rsc_count(rx_desc);
1272
1273                 if (rsc_count) {
1274                         u32 nextp = (staterr & IXGBE_RXDADV_NEXTP_MASK) >>
1275                                      IXGBE_RXDADV_NEXTP_SHIFT;
1276                         next_buffer = &rx_ring->rx_buffer_info[nextp];
1277                 } else {
1278                         next_buffer = &rx_ring->rx_buffer_info[i];
1279                 }
1280
1281                 if (staterr & IXGBE_RXD_STAT_EOP) {
1282                         if (skb->prev)
1283                                 skb = ixgbe_transform_rsc_queue(skb, &(rx_ring->rsc_count));
1284                         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
1285                                 if (IXGBE_RSC_CB(skb)->delay_unmap) {
1286                                         dma_unmap_single(&pdev->dev,
1287                                                          IXGBE_RSC_CB(skb)->dma,
1288                                                          rx_ring->rx_buf_len,
1289                                                          DMA_FROM_DEVICE);
1290                                         IXGBE_RSC_CB(skb)->dma = 0;
1291                                         IXGBE_RSC_CB(skb)->delay_unmap = false;
1292                                 }
1293                                 if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED)
1294                                         rx_ring->rsc_count += skb_shinfo(skb)->nr_frags;
1295                                 else
1296                                         rx_ring->rsc_count++;
1297                                 rx_ring->rsc_flush++;
1298                         }
1299                         rx_ring->stats.packets++;
1300                         rx_ring->stats.bytes += skb->len;
1301                 } else {
1302                         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
1303                                 rx_buffer_info->skb = next_buffer->skb;
1304                                 rx_buffer_info->dma = next_buffer->dma;
1305                                 next_buffer->skb = skb;
1306                                 next_buffer->dma = 0;
1307                         } else {
1308                                 skb->next = next_buffer->skb;
1309                                 skb->next->prev = skb;
1310                         }
1311                         rx_ring->non_eop_descs++;
1312                         goto next_desc;
1313                 }
1314
1315                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
1316                         dev_kfree_skb_irq(skb);
1317                         goto next_desc;
1318                 }
1319
1320                 ixgbe_rx_checksum(adapter, rx_desc, skb);
1321
1322                 /* probably a little skewed due to removing CRC */
1323                 total_rx_bytes += skb->len;
1324                 total_rx_packets++;
1325
1326                 skb->protocol = eth_type_trans(skb, adapter->netdev);
1327 #ifdef IXGBE_FCOE
1328                 /* if ddp, not passing to ULD unless for FCP_RSP or error */
1329                 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
1330                         ddp_bytes = ixgbe_fcoe_ddp(adapter, rx_desc, skb);
1331                         if (!ddp_bytes)
1332                                 goto next_desc;
1333                 }
1334 #endif /* IXGBE_FCOE */
1335                 ixgbe_receive_skb(q_vector, skb, staterr, rx_ring, rx_desc);
1336
1337 next_desc:
1338                 rx_desc->wb.upper.status_error = 0;
1339
1340                 /* return some buffers to hardware, one at a time is too slow */
1341                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
1342                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1343                         cleaned_count = 0;
1344                 }
1345
1346                 /* use prefetched values */
1347                 rx_desc = next_rxd;
1348                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1349
1350                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
1351         }
1352
1353         rx_ring->next_to_clean = i;
1354         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
1355
1356         if (cleaned_count)
1357                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
1358
1359 #ifdef IXGBE_FCOE
1360         /* include DDPed FCoE data */
1361         if (ddp_bytes > 0) {
1362                 unsigned int mss;
1363
1364                 mss = adapter->netdev->mtu - sizeof(struct fcoe_hdr) -
1365                         sizeof(struct fc_frame_header) -
1366                         sizeof(struct fcoe_crc_eof);
1367                 if (mss > 512)
1368                         mss &= ~511;
1369                 total_rx_bytes += ddp_bytes;
1370                 total_rx_packets += DIV_ROUND_UP(ddp_bytes, mss);
1371         }
1372 #endif /* IXGBE_FCOE */
1373
1374         rx_ring->total_packets += total_rx_packets;
1375         rx_ring->total_bytes += total_rx_bytes;
1376         netdev->stats.rx_bytes += total_rx_bytes;
1377         netdev->stats.rx_packets += total_rx_packets;
1378
1379         return cleaned;
1380 }
1381
1382 static int ixgbe_clean_rxonly(struct napi_struct *, int);
1383 /**
1384  * ixgbe_configure_msix - Configure MSI-X hardware
1385  * @adapter: board private structure
1386  *
1387  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
1388  * interrupts.
1389  **/
1390 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
1391 {
1392         struct ixgbe_q_vector *q_vector;
1393         int i, j, q_vectors, v_idx, r_idx;
1394         u32 mask;
1395
1396         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1397
1398         /*
1399          * Populate the IVAR table and set the ITR values to the
1400          * corresponding register.
1401          */
1402         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
1403                 q_vector = adapter->q_vector[v_idx];
1404                 /* XXX for_each_set_bit(...) */
1405                 r_idx = find_first_bit(q_vector->rxr_idx,
1406                                        adapter->num_rx_queues);
1407
1408                 for (i = 0; i < q_vector->rxr_count; i++) {
1409                         j = adapter->rx_ring[r_idx]->reg_idx;
1410                         ixgbe_set_ivar(adapter, 0, j, v_idx);
1411                         r_idx = find_next_bit(q_vector->rxr_idx,
1412                                               adapter->num_rx_queues,
1413                                               r_idx + 1);
1414                 }
1415                 r_idx = find_first_bit(q_vector->txr_idx,
1416                                        adapter->num_tx_queues);
1417
1418                 for (i = 0; i < q_vector->txr_count; i++) {
1419                         j = adapter->tx_ring[r_idx]->reg_idx;
1420                         ixgbe_set_ivar(adapter, 1, j, v_idx);
1421                         r_idx = find_next_bit(q_vector->txr_idx,
1422                                               adapter->num_tx_queues,
1423                                               r_idx + 1);
1424                 }
1425
1426                 if (q_vector->txr_count && !q_vector->rxr_count)
1427                         /* tx only */
1428                         q_vector->eitr = adapter->tx_eitr_param;
1429                 else if (q_vector->rxr_count)
1430                         /* rx or mixed */
1431                         q_vector->eitr = adapter->rx_eitr_param;
1432
1433                 ixgbe_write_eitr(q_vector);
1434         }
1435
1436         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
1437                 ixgbe_set_ivar(adapter, -1, IXGBE_IVAR_OTHER_CAUSES_INDEX,
1438                                v_idx);
1439         else if (adapter->hw.mac.type == ixgbe_mac_82599EB)
1440                 ixgbe_set_ivar(adapter, -1, 1, v_idx);
1441         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
1442
1443         /* set up to autoclear timer, and the vectors */
1444         mask = IXGBE_EIMS_ENABLE_MASK;
1445         if (adapter->num_vfs)
1446                 mask &= ~(IXGBE_EIMS_OTHER |
1447                           IXGBE_EIMS_MAILBOX |
1448                           IXGBE_EIMS_LSC);
1449         else
1450                 mask &= ~(IXGBE_EIMS_OTHER | IXGBE_EIMS_LSC);
1451         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
1452 }
1453
1454 enum latency_range {
1455         lowest_latency = 0,
1456         low_latency = 1,
1457         bulk_latency = 2,
1458         latency_invalid = 255
1459 };
1460
1461 /**
1462  * ixgbe_update_itr - update the dynamic ITR value based on statistics
1463  * @adapter: pointer to adapter
1464  * @eitr: eitr setting (ints per sec) to give last timeslice
1465  * @itr_setting: current throttle rate in ints/second
1466  * @packets: the number of packets during this measurement interval
1467  * @bytes: the number of bytes during this measurement interval
1468  *
1469  *      Stores a new ITR value based on packets and byte
1470  *      counts during the last interrupt.  The advantage of per interrupt
1471  *      computation is faster updates and more accurate ITR for the current
1472  *      traffic pattern.  Constants in this function were computed
1473  *      based on theoretical maximum wire speed and thresholds were set based
1474  *      on testing data as well as attempting to minimize response time
1475  *      while increasing bulk throughput.
1476  *      this functionality is controlled by the InterruptThrottleRate module
1477  *      parameter (see ixgbe_param.c)
1478  **/
1479 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
1480                            u32 eitr, u8 itr_setting,
1481                            int packets, int bytes)
1482 {
1483         unsigned int retval = itr_setting;
1484         u32 timepassed_us;
1485         u64 bytes_perint;
1486
1487         if (packets == 0)
1488                 goto update_itr_done;
1489
1490
1491         /* simple throttlerate management
1492          *    0-20MB/s lowest (100000 ints/s)
1493          *   20-100MB/s low   (20000 ints/s)
1494          *  100-1249MB/s bulk (8000 ints/s)
1495          */
1496         /* what was last interrupt timeslice? */
1497         timepassed_us = 1000000/eitr;
1498         bytes_perint = bytes / timepassed_us; /* bytes/usec */
1499
1500         switch (itr_setting) {
1501         case lowest_latency:
1502                 if (bytes_perint > adapter->eitr_low)
1503                         retval = low_latency;
1504                 break;
1505         case low_latency:
1506                 if (bytes_perint > adapter->eitr_high)
1507                         retval = bulk_latency;
1508                 else if (bytes_perint <= adapter->eitr_low)
1509                         retval = lowest_latency;
1510                 break;
1511         case bulk_latency:
1512                 if (bytes_perint <= adapter->eitr_high)
1513                         retval = low_latency;
1514                 break;
1515         }
1516
1517 update_itr_done:
1518         return retval;
1519 }
1520
1521 /**
1522  * ixgbe_write_eitr - write EITR register in hardware specific way
1523  * @q_vector: structure containing interrupt and ring information
1524  *
1525  * This function is made to be called by ethtool and by the driver
1526  * when it needs to update EITR registers at runtime.  Hardware
1527  * specific quirks/differences are taken care of here.
1528  */
1529 void ixgbe_write_eitr(struct ixgbe_q_vector *q_vector)
1530 {
1531         struct ixgbe_adapter *adapter = q_vector->adapter;
1532         struct ixgbe_hw *hw = &adapter->hw;
1533         int v_idx = q_vector->v_idx;
1534         u32 itr_reg = EITR_INTS_PER_SEC_TO_REG(q_vector->eitr);
1535
1536         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1537                 /* must write high and low 16 bits to reset counter */
1538                 itr_reg |= (itr_reg << 16);
1539         } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
1540                 /*
1541                  * 82599 can support a value of zero, so allow it for
1542                  * max interrupt rate, but there is an errata where it can
1543                  * not be zero with RSC
1544                  */
1545                 if (itr_reg == 8 &&
1546                     !(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED))
1547                         itr_reg = 0;
1548
1549                 /*
1550                  * set the WDIS bit to not clear the timer bits and cause an
1551                  * immediate assertion of the interrupt
1552                  */
1553                 itr_reg |= IXGBE_EITR_CNT_WDIS;
1554         }
1555         IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg);
1556 }
1557
1558 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
1559 {
1560         struct ixgbe_adapter *adapter = q_vector->adapter;
1561         u32 new_itr;
1562         u8 current_itr, ret_itr;
1563         int i, r_idx;
1564         struct ixgbe_ring *rx_ring, *tx_ring;
1565
1566         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1567         for (i = 0; i < q_vector->txr_count; i++) {
1568                 tx_ring = adapter->tx_ring[r_idx];
1569                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1570                                            q_vector->tx_itr,
1571                                            tx_ring->total_packets,
1572                                            tx_ring->total_bytes);
1573                 /* if the result for this queue would decrease interrupt
1574                  * rate for this vector then use that result */
1575                 q_vector->tx_itr = ((q_vector->tx_itr > ret_itr) ?
1576                                     q_vector->tx_itr - 1 : ret_itr);
1577                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1578                                       r_idx + 1);
1579         }
1580
1581         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1582         for (i = 0; i < q_vector->rxr_count; i++) {
1583                 rx_ring = adapter->rx_ring[r_idx];
1584                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
1585                                            q_vector->rx_itr,
1586                                            rx_ring->total_packets,
1587                                            rx_ring->total_bytes);
1588                 /* if the result for this queue would decrease interrupt
1589                  * rate for this vector then use that result */
1590                 q_vector->rx_itr = ((q_vector->rx_itr > ret_itr) ?
1591                                     q_vector->rx_itr - 1 : ret_itr);
1592                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1593                                       r_idx + 1);
1594         }
1595
1596         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
1597
1598         switch (current_itr) {
1599         /* counts and packets in update_itr are dependent on these numbers */
1600         case lowest_latency:
1601                 new_itr = 100000;
1602                 break;
1603         case low_latency:
1604                 new_itr = 20000; /* aka hwitr = ~200 */
1605                 break;
1606         case bulk_latency:
1607         default:
1608                 new_itr = 8000;
1609                 break;
1610         }
1611
1612         if (new_itr != q_vector->eitr) {
1613                 /* do an exponential smoothing */
1614                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1615
1616                 /* save the algorithm value here, not the smoothed one */
1617                 q_vector->eitr = new_itr;
1618
1619                 ixgbe_write_eitr(q_vector);
1620         }
1621 }
1622
1623 /**
1624  * ixgbe_check_overtemp_task - worker thread to check over tempurature
1625  * @work: pointer to work_struct containing our data
1626  **/
1627 static void ixgbe_check_overtemp_task(struct work_struct *work)
1628 {
1629         struct ixgbe_adapter *adapter = container_of(work,
1630                                                      struct ixgbe_adapter,
1631                                                      check_overtemp_task);
1632         struct ixgbe_hw *hw = &adapter->hw;
1633         u32 eicr = adapter->interrupt_event;
1634
1635         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
1636                 switch (hw->device_id) {
1637                 case IXGBE_DEV_ID_82599_T3_LOM: {
1638                         u32 autoneg;
1639                         bool link_up = false;
1640
1641                         if (hw->mac.ops.check_link)
1642                                 hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
1643
1644                         if (((eicr & IXGBE_EICR_GPI_SDP0) && (!link_up)) ||
1645                             (eicr & IXGBE_EICR_LSC))
1646                                 /* Check if this is due to overtemp */
1647                                 if (hw->phy.ops.check_overtemp(hw) == IXGBE_ERR_OVERTEMP)
1648                                         break;
1649                         }
1650                         return;
1651                 default:
1652                         if (!(eicr & IXGBE_EICR_GPI_SDP0))
1653                                 return;
1654                         break;
1655                 }
1656                 e_crit(drv, "Network adapter has been stopped because it has "
1657                        "over heated. Restart the computer. If the problem "
1658                        "persists, power off the system and replace the "
1659                        "adapter\n");
1660                 /* write to clear the interrupt */
1661                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP0);
1662         }
1663 }
1664
1665 static void ixgbe_check_fan_failure(struct ixgbe_adapter *adapter, u32 eicr)
1666 {
1667         struct ixgbe_hw *hw = &adapter->hw;
1668
1669         if ((adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) &&
1670             (eicr & IXGBE_EICR_GPI_SDP1)) {
1671                 e_crit(probe, "Fan has stopped, replace the adapter\n");
1672                 /* write to clear the interrupt */
1673                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1674         }
1675 }
1676
1677 static void ixgbe_check_sfp_event(struct ixgbe_adapter *adapter, u32 eicr)
1678 {
1679         struct ixgbe_hw *hw = &adapter->hw;
1680
1681         if (eicr & IXGBE_EICR_GPI_SDP1) {
1682                 /* Clear the interrupt */
1683                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP1);
1684                 schedule_work(&adapter->multispeed_fiber_task);
1685         } else if (eicr & IXGBE_EICR_GPI_SDP2) {
1686                 /* Clear the interrupt */
1687                 IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_GPI_SDP2);
1688                 schedule_work(&adapter->sfp_config_module_task);
1689         } else {
1690                 /* Interrupt isn't for us... */
1691                 return;
1692         }
1693 }
1694
1695 static void ixgbe_check_lsc(struct ixgbe_adapter *adapter)
1696 {
1697         struct ixgbe_hw *hw = &adapter->hw;
1698
1699         adapter->lsc_int++;
1700         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
1701         adapter->link_check_timeout = jiffies;
1702         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
1703                 IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_EIMC_LSC);
1704                 IXGBE_WRITE_FLUSH(hw);
1705                 schedule_work(&adapter->watchdog_task);
1706         }
1707 }
1708
1709 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
1710 {
1711         struct net_device *netdev = data;
1712         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1713         struct ixgbe_hw *hw = &adapter->hw;
1714         u32 eicr;
1715
1716         /*
1717          * Workaround for Silicon errata.  Use clear-by-write instead
1718          * of clear-by-read.  Reading with EICS will return the
1719          * interrupt causes without clearing, which later be done
1720          * with the write to EICR.
1721          */
1722         eicr = IXGBE_READ_REG(hw, IXGBE_EICS);
1723         IXGBE_WRITE_REG(hw, IXGBE_EICR, eicr);
1724
1725         if (eicr & IXGBE_EICR_LSC)
1726                 ixgbe_check_lsc(adapter);
1727
1728         if (eicr & IXGBE_EICR_MAILBOX)
1729                 ixgbe_msg_task(adapter);
1730
1731         if (hw->mac.type == ixgbe_mac_82598EB)
1732                 ixgbe_check_fan_failure(adapter, eicr);
1733
1734         if (hw->mac.type == ixgbe_mac_82599EB) {
1735                 ixgbe_check_sfp_event(adapter, eicr);
1736                 adapter->interrupt_event = eicr;
1737                 if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
1738                     ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
1739                         schedule_work(&adapter->check_overtemp_task);
1740
1741                 /* Handle Flow Director Full threshold interrupt */
1742                 if (eicr & IXGBE_EICR_FLOW_DIR) {
1743                         int i;
1744                         IXGBE_WRITE_REG(hw, IXGBE_EICR, IXGBE_EICR_FLOW_DIR);
1745                         /* Disable transmits before FDIR Re-initialization */
1746                         netif_tx_stop_all_queues(netdev);
1747                         for (i = 0; i < adapter->num_tx_queues; i++) {
1748                                 struct ixgbe_ring *tx_ring =
1749                                                             adapter->tx_ring[i];
1750                                 if (test_and_clear_bit(__IXGBE_FDIR_INIT_DONE,
1751                                                        &tx_ring->reinit_state))
1752                                         schedule_work(&adapter->fdir_reinit_task);
1753                         }
1754                 }
1755         }
1756         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1757                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
1758
1759         return IRQ_HANDLED;
1760 }
1761
1762 static inline void ixgbe_irq_enable_queues(struct ixgbe_adapter *adapter,
1763                                            u64 qmask)
1764 {
1765         u32 mask;
1766
1767         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1768                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1769                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1770         } else {
1771                 mask = (qmask & 0xFFFFFFFF);
1772                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(0), mask);
1773                 mask = (qmask >> 32);
1774                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS_EX(1), mask);
1775         }
1776         /* skip the flush */
1777 }
1778
1779 static inline void ixgbe_irq_disable_queues(struct ixgbe_adapter *adapter,
1780                                             u64 qmask)
1781 {
1782         u32 mask;
1783
1784         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
1785                 mask = (IXGBE_EIMS_RTX_QUEUE & qmask);
1786                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, mask);
1787         } else {
1788                 mask = (qmask & 0xFFFFFFFF);
1789                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), mask);
1790                 mask = (qmask >> 32);
1791                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), mask);
1792         }
1793         /* skip the flush */
1794 }
1795
1796 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
1797 {
1798         struct ixgbe_q_vector *q_vector = data;
1799         struct ixgbe_adapter  *adapter = q_vector->adapter;
1800         struct ixgbe_ring     *tx_ring;
1801         int i, r_idx;
1802
1803         if (!q_vector->txr_count)
1804                 return IRQ_HANDLED;
1805
1806         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1807         for (i = 0; i < q_vector->txr_count; i++) {
1808                 tx_ring = adapter->tx_ring[r_idx];
1809                 tx_ring->total_bytes = 0;
1810                 tx_ring->total_packets = 0;
1811                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1812                                       r_idx + 1);
1813         }
1814
1815         /* EIAM disabled interrupts (on this vector) for us */
1816         napi_schedule(&q_vector->napi);
1817
1818         return IRQ_HANDLED;
1819 }
1820
1821 /**
1822  * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
1823  * @irq: unused
1824  * @data: pointer to our q_vector struct for this interrupt vector
1825  **/
1826 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
1827 {
1828         struct ixgbe_q_vector *q_vector = data;
1829         struct ixgbe_adapter  *adapter = q_vector->adapter;
1830         struct ixgbe_ring  *rx_ring;
1831         int r_idx;
1832         int i;
1833
1834         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1835         for (i = 0;  i < q_vector->rxr_count; i++) {
1836                 rx_ring = adapter->rx_ring[r_idx];
1837                 rx_ring->total_bytes = 0;
1838                 rx_ring->total_packets = 0;
1839                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1840                                       r_idx + 1);
1841         }
1842
1843         if (!q_vector->rxr_count)
1844                 return IRQ_HANDLED;
1845
1846         /* disable interrupts on this vector only */
1847         /* EIAM disabled interrupts (on this vector) for us */
1848         napi_schedule(&q_vector->napi);
1849
1850         return IRQ_HANDLED;
1851 }
1852
1853 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
1854 {
1855         struct ixgbe_q_vector *q_vector = data;
1856         struct ixgbe_adapter  *adapter = q_vector->adapter;
1857         struct ixgbe_ring  *ring;
1858         int r_idx;
1859         int i;
1860
1861         if (!q_vector->txr_count && !q_vector->rxr_count)
1862                 return IRQ_HANDLED;
1863
1864         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1865         for (i = 0; i < q_vector->txr_count; i++) {
1866                 ring = adapter->tx_ring[r_idx];
1867                 ring->total_bytes = 0;
1868                 ring->total_packets = 0;
1869                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1870                                       r_idx + 1);
1871         }
1872
1873         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1874         for (i = 0; i < q_vector->rxr_count; i++) {
1875                 ring = adapter->rx_ring[r_idx];
1876                 ring->total_bytes = 0;
1877                 ring->total_packets = 0;
1878                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1879                                       r_idx + 1);
1880         }
1881
1882         /* EIAM disabled interrupts (on this vector) for us */
1883         napi_schedule(&q_vector->napi);
1884
1885         return IRQ_HANDLED;
1886 }
1887
1888 /**
1889  * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
1890  * @napi: napi struct with our devices info in it
1891  * @budget: amount of work driver is allowed to do this pass, in packets
1892  *
1893  * This function is optimized for cleaning one queue only on a single
1894  * q_vector!!!
1895  **/
1896 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
1897 {
1898         struct ixgbe_q_vector *q_vector =
1899                                container_of(napi, struct ixgbe_q_vector, napi);
1900         struct ixgbe_adapter *adapter = q_vector->adapter;
1901         struct ixgbe_ring *rx_ring = NULL;
1902         int work_done = 0;
1903         long r_idx;
1904
1905         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1906         rx_ring = adapter->rx_ring[r_idx];
1907 #ifdef CONFIG_IXGBE_DCA
1908         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1909                 ixgbe_update_rx_dca(adapter, rx_ring);
1910 #endif
1911
1912         ixgbe_clean_rx_irq(q_vector, rx_ring, &work_done, budget);
1913
1914         /* If all Rx work done, exit the polling mode */
1915         if (work_done < budget) {
1916                 napi_complete(napi);
1917                 if (adapter->rx_itr_setting & 1)
1918                         ixgbe_set_itr_msix(q_vector);
1919                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1920                         ixgbe_irq_enable_queues(adapter,
1921                                                 ((u64)1 << q_vector->v_idx));
1922         }
1923
1924         return work_done;
1925 }
1926
1927 /**
1928  * ixgbe_clean_rxtx_many - msix (aka one shot) rx clean routine
1929  * @napi: napi struct with our devices info in it
1930  * @budget: amount of work driver is allowed to do this pass, in packets
1931  *
1932  * This function will clean more than one rx queue associated with a
1933  * q_vector.
1934  **/
1935 static int ixgbe_clean_rxtx_many(struct napi_struct *napi, int budget)
1936 {
1937         struct ixgbe_q_vector *q_vector =
1938                                container_of(napi, struct ixgbe_q_vector, napi);
1939         struct ixgbe_adapter *adapter = q_vector->adapter;
1940         struct ixgbe_ring *ring = NULL;
1941         int work_done = 0, i;
1942         long r_idx;
1943         bool tx_clean_complete = true;
1944
1945         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
1946         for (i = 0; i < q_vector->txr_count; i++) {
1947                 ring = adapter->tx_ring[r_idx];
1948 #ifdef CONFIG_IXGBE_DCA
1949                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1950                         ixgbe_update_tx_dca(adapter, ring);
1951 #endif
1952                 tx_clean_complete &= ixgbe_clean_tx_irq(q_vector, ring);
1953                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
1954                                       r_idx + 1);
1955         }
1956
1957         /* attempt to distribute budget to each queue fairly, but don't allow
1958          * the budget to go below 1 because we'll exit polling */
1959         budget /= (q_vector->rxr_count ?: 1);
1960         budget = max(budget, 1);
1961         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1962         for (i = 0; i < q_vector->rxr_count; i++) {
1963                 ring = adapter->rx_ring[r_idx];
1964 #ifdef CONFIG_IXGBE_DCA
1965                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
1966                         ixgbe_update_rx_dca(adapter, ring);
1967 #endif
1968                 ixgbe_clean_rx_irq(q_vector, ring, &work_done, budget);
1969                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
1970                                       r_idx + 1);
1971         }
1972
1973         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
1974         ring = adapter->rx_ring[r_idx];
1975         /* If all Rx work done, exit the polling mode */
1976         if (work_done < budget) {
1977                 napi_complete(napi);
1978                 if (adapter->rx_itr_setting & 1)
1979                         ixgbe_set_itr_msix(q_vector);
1980                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1981                         ixgbe_irq_enable_queues(adapter,
1982                                                 ((u64)1 << q_vector->v_idx));
1983                 return 0;
1984         }
1985
1986         return work_done;
1987 }
1988
1989 /**
1990  * ixgbe_clean_txonly - msix (aka one shot) tx clean routine
1991  * @napi: napi struct with our devices info in it
1992  * @budget: amount of work driver is allowed to do this pass, in packets
1993  *
1994  * This function is optimized for cleaning one queue only on a single
1995  * q_vector!!!
1996  **/
1997 static int ixgbe_clean_txonly(struct napi_struct *napi, int budget)
1998 {
1999         struct ixgbe_q_vector *q_vector =
2000                                container_of(napi, struct ixgbe_q_vector, napi);
2001         struct ixgbe_adapter *adapter = q_vector->adapter;
2002         struct ixgbe_ring *tx_ring = NULL;
2003         int work_done = 0;
2004         long r_idx;
2005
2006         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
2007         tx_ring = adapter->tx_ring[r_idx];
2008 #ifdef CONFIG_IXGBE_DCA
2009         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
2010                 ixgbe_update_tx_dca(adapter, tx_ring);
2011 #endif
2012
2013         if (!ixgbe_clean_tx_irq(q_vector, tx_ring))
2014                 work_done = budget;
2015
2016         /* If all Tx work done, exit the polling mode */
2017         if (work_done < budget) {
2018                 napi_complete(napi);
2019                 if (adapter->tx_itr_setting & 1)
2020                         ixgbe_set_itr_msix(q_vector);
2021                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2022                         ixgbe_irq_enable_queues(adapter, ((u64)1 << q_vector->v_idx));
2023         }
2024
2025         return work_done;
2026 }
2027
2028 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
2029                                      int r_idx)
2030 {
2031         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2032
2033         set_bit(r_idx, q_vector->rxr_idx);
2034         q_vector->rxr_count++;
2035 }
2036
2037 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
2038                                      int t_idx)
2039 {
2040         struct ixgbe_q_vector *q_vector = a->q_vector[v_idx];
2041
2042         set_bit(t_idx, q_vector->txr_idx);
2043         q_vector->txr_count++;
2044 }
2045
2046 /**
2047  * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
2048  * @adapter: board private structure to initialize
2049  * @vectors: allotted vector count for descriptor rings
2050  *
2051  * This function maps descriptor rings to the queue-specific vectors
2052  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
2053  * one vector per ring/queue, but on a constrained vector budget, we
2054  * group the rings as "efficiently" as possible.  You would add new
2055  * mapping configurations in here.
2056  **/
2057 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
2058                                       int vectors)
2059 {
2060         int v_start = 0;
2061         int rxr_idx = 0, txr_idx = 0;
2062         int rxr_remaining = adapter->num_rx_queues;
2063         int txr_remaining = adapter->num_tx_queues;
2064         int i, j;
2065         int rqpv, tqpv;
2066         int err = 0;
2067
2068         /* No mapping required if MSI-X is disabled. */
2069         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
2070                 goto out;
2071
2072         /*
2073          * The ideal configuration...
2074          * We have enough vectors to map one per queue.
2075          */
2076         if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
2077                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
2078                         map_vector_to_rxq(adapter, v_start, rxr_idx);
2079
2080                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
2081                         map_vector_to_txq(adapter, v_start, txr_idx);
2082
2083                 goto out;
2084         }
2085
2086         /*
2087          * If we don't have enough vectors for a 1-to-1
2088          * mapping, we'll have to group them so there are
2089          * multiple queues per vector.
2090          */
2091         /* Re-adjusting *qpv takes care of the remainder. */
2092         for (i = v_start; i < vectors; i++) {
2093                 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
2094                 for (j = 0; j < rqpv; j++) {
2095                         map_vector_to_rxq(adapter, i, rxr_idx);
2096                         rxr_idx++;
2097                         rxr_remaining--;
2098                 }
2099         }
2100         for (i = v_start; i < vectors; i++) {
2101                 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
2102                 for (j = 0; j < tqpv; j++) {
2103                         map_vector_to_txq(adapter, i, txr_idx);
2104                         txr_idx++;
2105                         txr_remaining--;
2106                 }
2107         }
2108
2109 out:
2110         return err;
2111 }
2112
2113 /**
2114  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
2115  * @adapter: board private structure
2116  *
2117  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
2118  * interrupts from the kernel.
2119  **/
2120 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
2121 {
2122         struct net_device *netdev = adapter->netdev;
2123         irqreturn_t (*handler)(int, void *);
2124         int i, vector, q_vectors, err;
2125         int ri=0, ti=0;
2126
2127         /* Decrement for Other and TCP Timer vectors */
2128         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2129
2130         /* Map the Tx/Rx rings to the vectors we were allotted. */
2131         err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
2132         if (err)
2133                 goto out;
2134
2135 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
2136                          (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
2137                          &ixgbe_msix_clean_many)
2138         for (vector = 0; vector < q_vectors; vector++) {
2139                 handler = SET_HANDLER(adapter->q_vector[vector]);
2140
2141                 if(handler == &ixgbe_msix_clean_rx) {
2142                         sprintf(adapter->name[vector], "%s-%s-%d",
2143                                 netdev->name, "rx", ri++);
2144                 }
2145                 else if(handler == &ixgbe_msix_clean_tx) {
2146                         sprintf(adapter->name[vector], "%s-%s-%d",
2147                                 netdev->name, "tx", ti++);
2148                 }
2149                 else
2150                         sprintf(adapter->name[vector], "%s-%s-%d",
2151                                 netdev->name, "TxRx", vector);
2152
2153                 err = request_irq(adapter->msix_entries[vector].vector,
2154                                   handler, 0, adapter->name[vector],
2155                                   adapter->q_vector[vector]);
2156                 if (err) {
2157                         e_err(probe, "request_irq failed for MSIX interrupt "
2158                               "Error: %d\n", err);
2159                         goto free_queue_irqs;
2160                 }
2161         }
2162
2163         sprintf(adapter->name[vector], "%s:lsc", netdev->name);
2164         err = request_irq(adapter->msix_entries[vector].vector,
2165                           ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
2166         if (err) {
2167                 e_err(probe, "request_irq for msix_lsc failed: %d\n", err);
2168                 goto free_queue_irqs;
2169         }
2170
2171         return 0;
2172
2173 free_queue_irqs:
2174         for (i = vector - 1; i >= 0; i--)
2175                 free_irq(adapter->msix_entries[--vector].vector,
2176                          adapter->q_vector[i]);
2177         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2178         pci_disable_msix(adapter->pdev);
2179         kfree(adapter->msix_entries);
2180         adapter->msix_entries = NULL;
2181 out:
2182         return err;
2183 }
2184
2185 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
2186 {
2187         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2188         u8 current_itr;
2189         u32 new_itr = q_vector->eitr;
2190         struct ixgbe_ring *rx_ring = adapter->rx_ring[0];
2191         struct ixgbe_ring *tx_ring = adapter->tx_ring[0];
2192
2193         q_vector->tx_itr = ixgbe_update_itr(adapter, new_itr,
2194                                             q_vector->tx_itr,
2195                                             tx_ring->total_packets,
2196                                             tx_ring->total_bytes);
2197         q_vector->rx_itr = ixgbe_update_itr(adapter, new_itr,
2198                                             q_vector->rx_itr,
2199                                             rx_ring->total_packets,
2200                                             rx_ring->total_bytes);
2201
2202         current_itr = max(q_vector->rx_itr, q_vector->tx_itr);
2203
2204         switch (current_itr) {
2205         /* counts and packets in update_itr are dependent on these numbers */
2206         case lowest_latency:
2207                 new_itr = 100000;
2208                 break;
2209         case low_latency:
2210                 new_itr = 20000; /* aka hwitr = ~200 */
2211                 break;
2212         case bulk_latency:
2213                 new_itr = 8000;
2214                 break;
2215         default:
2216                 break;
2217         }
2218
2219         if (new_itr != q_vector->eitr) {
2220                 /* do an exponential smoothing */
2221                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
2222
2223                 /* save the algorithm value here, not the smoothed one */
2224                 q_vector->eitr = new_itr;
2225
2226                 ixgbe_write_eitr(q_vector);
2227         }
2228 }
2229
2230 /**
2231  * ixgbe_irq_enable - Enable default interrupt generation settings
2232  * @adapter: board private structure
2233  **/
2234 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
2235 {
2236         u32 mask;
2237
2238         mask = (IXGBE_EIMS_ENABLE_MASK & ~IXGBE_EIMS_RTX_QUEUE);
2239         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
2240                 mask |= IXGBE_EIMS_GPI_SDP0;
2241         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE)
2242                 mask |= IXGBE_EIMS_GPI_SDP1;
2243         if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
2244                 mask |= IXGBE_EIMS_ECC;
2245                 mask |= IXGBE_EIMS_GPI_SDP1;
2246                 mask |= IXGBE_EIMS_GPI_SDP2;
2247                 if (adapter->num_vfs)
2248                         mask |= IXGBE_EIMS_MAILBOX;
2249         }
2250         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
2251             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
2252                 mask |= IXGBE_EIMS_FLOW_DIR;
2253
2254         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
2255         ixgbe_irq_enable_queues(adapter, ~0);
2256         IXGBE_WRITE_FLUSH(&adapter->hw);
2257
2258         if (adapter->num_vfs > 32) {
2259                 u32 eitrsel = (1 << (adapter->num_vfs - 32)) - 1;
2260                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, eitrsel);
2261         }
2262 }
2263
2264 /**
2265  * ixgbe_intr - legacy mode Interrupt Handler
2266  * @irq: interrupt number
2267  * @data: pointer to a network interface device structure
2268  **/
2269 static irqreturn_t ixgbe_intr(int irq, void *data)
2270 {
2271         struct net_device *netdev = data;
2272         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2273         struct ixgbe_hw *hw = &adapter->hw;
2274         struct ixgbe_q_vector *q_vector = adapter->q_vector[0];
2275         u32 eicr;
2276
2277         /*
2278          * Workaround for silicon errata.  Mask the interrupts
2279          * before the read of EICR.
2280          */
2281         IXGBE_WRITE_REG(hw, IXGBE_EIMC, IXGBE_IRQ_CLEAR_MASK);
2282
2283         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
2284          * therefore no explict interrupt disable is necessary */
2285         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
2286         if (!eicr) {
2287                 /* shared interrupt alert!
2288                  * make sure interrupts are enabled because the read will
2289                  * have disabled interrupts due to EIAM */
2290                 ixgbe_irq_enable(adapter);
2291                 return IRQ_NONE;        /* Not our interrupt */
2292         }
2293
2294         if (eicr & IXGBE_EICR_LSC)
2295                 ixgbe_check_lsc(adapter);
2296
2297         if (hw->mac.type == ixgbe_mac_82599EB)
2298                 ixgbe_check_sfp_event(adapter, eicr);
2299
2300         ixgbe_check_fan_failure(adapter, eicr);
2301         if ((adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) &&
2302             ((eicr & IXGBE_EICR_GPI_SDP0) || (eicr & IXGBE_EICR_LSC)))
2303                 schedule_work(&adapter->check_overtemp_task);
2304
2305         if (napi_schedule_prep(&(q_vector->napi))) {
2306                 adapter->tx_ring[0]->total_packets = 0;
2307                 adapter->tx_ring[0]->total_bytes = 0;
2308                 adapter->rx_ring[0]->total_packets = 0;
2309                 adapter->rx_ring[0]->total_bytes = 0;
2310                 /* would disable interrupts here but EIAM disabled it */
2311                 __napi_schedule(&(q_vector->napi));
2312         }
2313
2314         return IRQ_HANDLED;
2315 }
2316
2317 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
2318 {
2319         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
2320
2321         for (i = 0; i < q_vectors; i++) {
2322                 struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
2323                 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
2324                 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
2325                 q_vector->rxr_count = 0;
2326                 q_vector->txr_count = 0;
2327         }
2328 }
2329
2330 /**
2331  * ixgbe_request_irq - initialize interrupts
2332  * @adapter: board private structure
2333  *
2334  * Attempts to configure interrupts using the best available
2335  * capabilities of the hardware and kernel.
2336  **/
2337 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
2338 {
2339         struct net_device *netdev = adapter->netdev;
2340         int err;
2341
2342         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2343                 err = ixgbe_request_msix_irqs(adapter);
2344         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2345                 err = request_irq(adapter->pdev->irq, ixgbe_intr, 0,
2346                                   netdev->name, netdev);
2347         } else {
2348                 err = request_irq(adapter->pdev->irq, ixgbe_intr, IRQF_SHARED,
2349                                   netdev->name, netdev);
2350         }
2351
2352         if (err)
2353                 e_err(probe, "request_irq failed, Error %d\n", err);
2354
2355         return err;
2356 }
2357
2358 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
2359 {
2360         struct net_device *netdev = adapter->netdev;
2361
2362         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2363                 int i, q_vectors;
2364
2365                 q_vectors = adapter->num_msix_vectors;
2366
2367                 i = q_vectors - 1;
2368                 free_irq(adapter->msix_entries[i].vector, netdev);
2369
2370                 i--;
2371                 for (; i >= 0; i--) {
2372                         free_irq(adapter->msix_entries[i].vector,
2373                                  adapter->q_vector[i]);
2374                 }
2375
2376                 ixgbe_reset_q_vectors(adapter);
2377         } else {
2378                 free_irq(adapter->pdev->irq, netdev);
2379         }
2380 }
2381
2382 /**
2383  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
2384  * @adapter: board private structure
2385  **/
2386 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
2387 {
2388         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2389                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
2390         } else {
2391                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, 0xFFFF0000);
2392                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(0), ~0);
2393                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC_EX(1), ~0);
2394                 if (adapter->num_vfs > 32)
2395                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITRSEL, 0);
2396         }
2397         IXGBE_WRITE_FLUSH(&adapter->hw);
2398         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2399                 int i;
2400                 for (i = 0; i < adapter->num_msix_vectors; i++)
2401                         synchronize_irq(adapter->msix_entries[i].vector);
2402         } else {
2403                 synchronize_irq(adapter->pdev->irq);
2404         }
2405 }
2406
2407 /**
2408  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
2409  *
2410  **/
2411 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
2412 {
2413         struct ixgbe_hw *hw = &adapter->hw;
2414
2415         IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
2416                         EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr_param));
2417
2418         ixgbe_set_ivar(adapter, 0, 0, 0);
2419         ixgbe_set_ivar(adapter, 1, 0, 0);
2420
2421         map_vector_to_rxq(adapter, 0, 0);
2422         map_vector_to_txq(adapter, 0, 0);
2423
2424         e_info(hw, "Legacy interrupt IVAR setup done\n");
2425 }
2426
2427 /**
2428  * ixgbe_configure_tx_ring - Configure 8259x Tx ring after Reset
2429  * @adapter: board private structure
2430  * @ring: structure containing ring specific data
2431  *
2432  * Configure the Tx descriptor ring after a reset.
2433  **/
2434  static void ixgbe_configure_tx_ring(struct ixgbe_adapter *adapter,
2435                                      struct ixgbe_ring *ring)
2436 {
2437         struct ixgbe_hw *hw = &adapter->hw;
2438         u64 tdba = ring->dma;
2439         u16 reg_idx = ring->reg_idx;
2440
2441         IXGBE_WRITE_REG(hw, IXGBE_TDBAL(reg_idx),
2442                         (tdba & DMA_BIT_MASK(32)));
2443         IXGBE_WRITE_REG(hw, IXGBE_TDBAH(reg_idx), (tdba >> 32));
2444         IXGBE_WRITE_REG(hw, IXGBE_TDLEN(reg_idx),
2445                         ring->count * sizeof(union ixgbe_adv_tx_desc));
2446         IXGBE_WRITE_REG(hw, IXGBE_TDH(reg_idx), 0);
2447         IXGBE_WRITE_REG(hw, IXGBE_TDT(reg_idx), 0);
2448         ring->head = IXGBE_TDH(reg_idx);
2449         ring->tail = IXGBE_TDT(reg_idx);
2450
2451 }
2452
2453 static void ixgbe_setup_mtqc(struct ixgbe_adapter *adapter)
2454 {
2455         struct ixgbe_hw *hw = &adapter->hw;
2456         u32 rttdcs;
2457         u32 mask;
2458
2459         if (hw->mac.type == ixgbe_mac_82598EB)
2460                 return;
2461
2462         /* disable the arbiter while setting MTQC */
2463         rttdcs = IXGBE_READ_REG(hw, IXGBE_RTTDCS);
2464         rttdcs |= IXGBE_RTTDCS_ARBDIS;
2465         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2466
2467         /* set transmit pool layout */
2468         mask = (IXGBE_FLAG_SRIOV_ENABLED | IXGBE_FLAG_DCB_ENABLED);
2469         switch (adapter->flags & mask) {
2470
2471         case (IXGBE_FLAG_SRIOV_ENABLED):
2472                 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2473                                 (IXGBE_MTQC_VT_ENA | IXGBE_MTQC_64VF));
2474                 break;
2475
2476         case (IXGBE_FLAG_DCB_ENABLED):
2477                 /* We enable 8 traffic classes, DCB only */
2478                 IXGBE_WRITE_REG(hw, IXGBE_MTQC,
2479                               (IXGBE_MTQC_RT_ENA | IXGBE_MTQC_8TC_8TQ));
2480                 break;
2481
2482         default:
2483                 IXGBE_WRITE_REG(hw, IXGBE_MTQC, IXGBE_MTQC_64Q_1PB);
2484                 break;
2485         }
2486
2487         /* re-enable the arbiter */
2488         rttdcs &= ~IXGBE_RTTDCS_ARBDIS;
2489         IXGBE_WRITE_REG(hw, IXGBE_RTTDCS, rttdcs);
2490 }
2491
2492 /**
2493  * ixgbe_configure_tx - Configure 8259x Transmit Unit after Reset
2494  * @adapter: board private structure
2495  *
2496  * Configure the Tx unit of the MAC after a reset.
2497  **/
2498 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
2499 {
2500         u32 i;
2501
2502         /* Setup the HW Tx Head and Tail descriptor pointers */
2503         for (i = 0; i < adapter->num_tx_queues; i++)
2504                 ixgbe_configure_tx_ring(adapter, adapter->tx_ring[i]);
2505
2506         ixgbe_setup_mtqc(adapter);
2507 }
2508
2509 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT 2
2510
2511 static void ixgbe_configure_srrctl(struct ixgbe_adapter *adapter,
2512                                    struct ixgbe_ring *rx_ring)
2513 {
2514         u32 srrctl;
2515         int index;
2516         struct ixgbe_ring_feature *feature = adapter->ring_feature;
2517
2518         index = rx_ring->reg_idx;
2519         if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
2520                 unsigned long mask;
2521                 mask = (unsigned long) feature[RING_F_RSS].mask;
2522                 index = index & mask;
2523         }
2524         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(index));
2525
2526         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
2527         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
2528
2529         srrctl |= (IXGBE_RX_HDR_SIZE << IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
2530                   IXGBE_SRRCTL_BSIZEHDR_MASK;
2531
2532         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2533 #if (PAGE_SIZE / 2) > IXGBE_MAX_RXBUFFER
2534                 srrctl |= IXGBE_MAX_RXBUFFER >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2535 #else
2536                 srrctl |= (PAGE_SIZE / 2) >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2537 #endif
2538                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
2539         } else {
2540                 srrctl |= ALIGN(rx_ring->rx_buf_len, 1024) >>
2541                           IXGBE_SRRCTL_BSIZEPKT_SHIFT;
2542                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
2543         }
2544
2545         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(index), srrctl);
2546 }
2547
2548 static void ixgbe_setup_mrqc(struct ixgbe_adapter *adapter)
2549 {
2550         struct ixgbe_hw *hw = &adapter->hw;
2551         static const u32 seed[10] = { 0xE291D73D, 0x1805EC6C, 0x2A94B30D,
2552                           0xA54F2BEC, 0xEA49AF7C, 0xE214AD3D, 0xB855AABE,
2553                           0x6A3E67EA, 0x14364D17, 0x3BED200D};
2554         u32 mrqc = 0, reta = 0;
2555         u32 rxcsum;
2556         int i, j;
2557         int mask;
2558
2559         /* Fill out hash function seeds */
2560         for (i = 0; i < 10; i++)
2561                 IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), seed[i]);
2562
2563         /* Fill out redirection table */
2564         for (i = 0, j = 0; i < 128; i++, j++) {
2565                 if (j == adapter->ring_feature[RING_F_RSS].indices)
2566                         j = 0;
2567                 /* reta = 4-byte sliding window of
2568                  * 0x00..(indices-1)(indices-1)00..etc. */
2569                 reta = (reta << 8) | (j * 0x11);
2570                 if ((i & 3) == 3)
2571                         IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
2572         }
2573
2574         /* Disable indicating checksum in descriptor, enables RSS hash */
2575         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
2576         rxcsum |= IXGBE_RXCSUM_PCSD;
2577         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
2578
2579         if (adapter->hw.mac.type == ixgbe_mac_82598EB)
2580                 mask = adapter->flags & IXGBE_FLAG_RSS_ENABLED;
2581         else
2582                 mask = adapter->flags & (IXGBE_FLAG_RSS_ENABLED
2583 #ifdef CONFIG_IXGBE_DCB
2584                                          | IXGBE_FLAG_DCB_ENABLED
2585 #endif
2586                                          | IXGBE_FLAG_SRIOV_ENABLED
2587                                         );
2588
2589         switch (mask) {
2590         case (IXGBE_FLAG_RSS_ENABLED):
2591                 mrqc = IXGBE_MRQC_RSSEN;
2592                 break;
2593         case (IXGBE_FLAG_SRIOV_ENABLED):
2594                 mrqc = IXGBE_MRQC_VMDQEN;
2595                 break;
2596 #ifdef CONFIG_IXGBE_DCB
2597         case (IXGBE_FLAG_DCB_ENABLED):
2598                 mrqc = IXGBE_MRQC_RT8TCEN;
2599                 break;
2600 #endif /* CONFIG_IXGBE_DCB */
2601         default:
2602                 break;
2603         }
2604
2605         /* Perform hash on these packet types */
2606         mrqc |= IXGBE_MRQC_RSS_FIELD_IPV4
2607               | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
2608               | IXGBE_MRQC_RSS_FIELD_IPV6
2609               | IXGBE_MRQC_RSS_FIELD_IPV6_TCP;
2610
2611         IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
2612 }
2613
2614 /**
2615  * ixgbe_configure_rscctl - enable RSC for the indicated ring
2616  * @adapter:    address of board private structure
2617  * @index:      index of ring to set
2618  **/
2619 static void ixgbe_configure_rscctl(struct ixgbe_adapter *adapter, int index)
2620 {
2621         struct ixgbe_ring *rx_ring;
2622         struct ixgbe_hw *hw = &adapter->hw;
2623         int j;
2624         u32 rscctrl;
2625         int rx_buf_len;
2626
2627         rx_ring = adapter->rx_ring[index];
2628         j = rx_ring->reg_idx;
2629         rx_buf_len = rx_ring->rx_buf_len;
2630         rscctrl = IXGBE_READ_REG(hw, IXGBE_RSCCTL(j));
2631         rscctrl |= IXGBE_RSCCTL_RSCEN;
2632         /*
2633          * we must limit the number of descriptors so that the
2634          * total size of max desc * buf_len is not greater
2635          * than 65535
2636          */
2637         if (rx_ring->flags & IXGBE_RING_RX_PS_ENABLED) {
2638 #if (MAX_SKB_FRAGS > 16)
2639                 rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2640 #elif (MAX_SKB_FRAGS > 8)
2641                 rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2642 #elif (MAX_SKB_FRAGS > 4)
2643                 rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2644 #else
2645                 rscctrl |= IXGBE_RSCCTL_MAXDESC_1;
2646 #endif
2647         } else {
2648                 if (rx_buf_len < IXGBE_RXBUFFER_4096)
2649                         rscctrl |= IXGBE_RSCCTL_MAXDESC_16;
2650                 else if (rx_buf_len < IXGBE_RXBUFFER_8192)
2651                         rscctrl |= IXGBE_RSCCTL_MAXDESC_8;
2652                 else
2653                         rscctrl |= IXGBE_RSCCTL_MAXDESC_4;
2654         }
2655         IXGBE_WRITE_REG(hw, IXGBE_RSCCTL(j), rscctrl);
2656 }
2657
2658 static void ixgbe_configure_rx_ring(struct ixgbe_adapter *adapter,
2659                                     struct ixgbe_ring *ring)
2660 {
2661         struct ixgbe_hw *hw = &adapter->hw;
2662         u64 rdba = ring->dma;
2663         u16 reg_idx = ring->reg_idx;
2664
2665         IXGBE_WRITE_REG(hw, IXGBE_RDBAL(reg_idx), (rdba & DMA_BIT_MASK(32)));
2666         IXGBE_WRITE_REG(hw, IXGBE_RDBAH(reg_idx), (rdba >> 32));
2667         IXGBE_WRITE_REG(hw, IXGBE_RDLEN(reg_idx),
2668                         ring->count * sizeof(union ixgbe_adv_rx_desc));
2669         IXGBE_WRITE_REG(hw, IXGBE_RDH(reg_idx), 0);
2670         IXGBE_WRITE_REG(hw, IXGBE_RDT(reg_idx), 0);
2671         ring->head = IXGBE_RDH(reg_idx);
2672         ring->tail = IXGBE_RDT(reg_idx);
2673 }
2674
2675 static void ixgbe_setup_psrtype(struct ixgbe_adapter *adapter)
2676 {
2677         struct ixgbe_hw *hw = &adapter->hw;
2678         int p;
2679
2680         /* PSRTYPE must be initialized in non 82598 adapters */
2681         u32 psrtype = IXGBE_PSRTYPE_TCPHDR |
2682                       IXGBE_PSRTYPE_UDPHDR |
2683                       IXGBE_PSRTYPE_IPV4HDR |
2684                       IXGBE_PSRTYPE_L2HDR |
2685                       IXGBE_PSRTYPE_IPV6HDR;
2686
2687         if (hw->mac.type == ixgbe_mac_82598EB)
2688                 return;
2689
2690         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED)
2691                 psrtype |= (adapter->num_rx_queues_per_pool << 29);
2692
2693         for (p = 0; p < adapter->num_rx_pools; p++)
2694                 IXGBE_WRITE_REG(hw, IXGBE_PSRTYPE(adapter->num_vfs + p),
2695                                 psrtype);
2696 }
2697
2698 /**
2699  * ixgbe_configure_rx - Configure 8259x Receive Unit after Reset
2700  * @adapter: board private structure
2701  *
2702  * Configure the Rx unit of the MAC after a reset.
2703  **/
2704 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
2705 {
2706         struct ixgbe_hw *hw = &adapter->hw;
2707         struct ixgbe_ring *rx_ring;
2708         struct net_device *netdev = adapter->netdev;
2709         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
2710         int i;
2711         u32 rxctrl;
2712         u32 hlreg0, gcr_ext;
2713         u32 rdrxctl;
2714         int rx_buf_len;
2715
2716         ixgbe_setup_psrtype(adapter);
2717
2718         /* Decide whether to use packet split mode or not */
2719         /* Do not use packet split if we're in SR-IOV Mode */
2720         if (!adapter->num_vfs)
2721                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
2722
2723         /* Set the RX buffer length according to the mode */
2724         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
2725                 rx_buf_len = IXGBE_RX_HDR_SIZE;
2726         } else {
2727                 if (!(adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) &&
2728                     (netdev->mtu <= ETH_DATA_LEN))
2729                         rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
2730                 else
2731                         rx_buf_len = ALIGN(max_frame, 1024);
2732         }
2733
2734         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
2735         if (adapter->netdev->mtu <= ETH_DATA_LEN)
2736                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
2737         else
2738                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2739 #ifdef IXGBE_FCOE
2740         if (netdev->features & NETIF_F_FCOE_MTU)
2741                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
2742 #endif
2743         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
2744
2745         /* disable receives while setting up the descriptors */
2746         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
2747         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
2748
2749         /*
2750          * Setup the HW Rx Head and Tail Descriptor Pointers and
2751          * the Base and Length of the Rx Descriptor Ring
2752          */
2753         for (i = 0; i < adapter->num_rx_queues; i++) {
2754                 rx_ring = adapter->rx_ring[i];
2755                 rx_ring->rx_buf_len = rx_buf_len;
2756
2757                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)
2758                         rx_ring->flags |= IXGBE_RING_RX_PS_ENABLED;
2759                 else
2760                         rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2761
2762 #ifdef IXGBE_FCOE
2763                 if (netdev->features & NETIF_F_FCOE_MTU) {
2764                         struct ixgbe_ring_feature *f;
2765                         f = &adapter->ring_feature[RING_F_FCOE];
2766                         if ((i >= f->mask) && (i < f->mask + f->indices)) {
2767                                 rx_ring->flags &= ~IXGBE_RING_RX_PS_ENABLED;
2768                                 if (rx_buf_len < IXGBE_FCOE_JUMBO_FRAME_SIZE)
2769                                         rx_ring->rx_buf_len =
2770                                                 IXGBE_FCOE_JUMBO_FRAME_SIZE;
2771                         }
2772                 }
2773
2774 #endif /* IXGBE_FCOE */
2775                 ixgbe_configure_rx_ring(adapter, rx_ring);
2776                 ixgbe_configure_srrctl(adapter, rx_ring);
2777         }
2778
2779         if (hw->mac.type == ixgbe_mac_82598EB) {
2780                 /*
2781                  * For VMDq support of different descriptor types or
2782                  * buffer sizes through the use of multiple SRRCTL
2783                  * registers, RDRXCTL.MVMEN must be set to 1
2784                  *
2785                  * also, the manual doesn't mention it clearly but DCA hints
2786                  * will only use queue 0's tags unless this bit is set.  Side
2787                  * effects of setting this bit are only that SRRCTL must be
2788                  * fully programmed [0..15]
2789                  */
2790                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2791                 rdrxctl |= IXGBE_RDRXCTL_MVMEN;
2792                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2793         }
2794
2795         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
2796                 u32 vt_reg_bits;
2797                 u32 reg_offset, vf_shift;
2798                 u32 vmdctl = IXGBE_READ_REG(hw, IXGBE_VT_CTL);
2799                 vt_reg_bits = IXGBE_VMD_CTL_VMDQ_EN
2800                         | IXGBE_VT_CTL_REPLEN;
2801                 vt_reg_bits |= (adapter->num_vfs <<
2802                                 IXGBE_VT_CTL_POOL_SHIFT);
2803                 IXGBE_WRITE_REG(hw, IXGBE_VT_CTL, vmdctl | vt_reg_bits);
2804                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, 0);
2805
2806                 vf_shift = adapter->num_vfs % 32;
2807                 reg_offset = adapter->num_vfs / 32;
2808                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(0), 0);
2809                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(1), 0);
2810                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(0), 0);
2811                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(1), 0);
2812                 /* Enable only the PF's pool for Tx/Rx */
2813                 IXGBE_WRITE_REG(hw, IXGBE_VFRE(reg_offset), (1 << vf_shift));
2814                 IXGBE_WRITE_REG(hw, IXGBE_VFTE(reg_offset), (1 << vf_shift));
2815                 IXGBE_WRITE_REG(hw, IXGBE_PFDTXGSWC, IXGBE_PFDTXGSWC_VT_LBEN);
2816         }
2817
2818         /* Program MRQC for the distribution of queues */
2819         ixgbe_setup_mrqc(adapter);
2820
2821         if (adapter->num_vfs) {
2822                 /* Map PF MAC address in RAR Entry 0 to first pool
2823                  * following VFs */
2824                 hw->mac.ops.set_vmdq(hw, 0, adapter->num_vfs);
2825
2826                 /* Set up VF register offsets for selected VT Mode, i.e.
2827                  * 64 VFs for SR-IOV */
2828                 gcr_ext = IXGBE_READ_REG(hw, IXGBE_GCR_EXT);
2829                 gcr_ext |= IXGBE_GCR_EXT_SRIOV;
2830                 IXGBE_WRITE_REG(hw, IXGBE_GCR_EXT, gcr_ext);
2831         }
2832
2833         if (hw->mac.type == ixgbe_mac_82599EB) {
2834                 rdrxctl = IXGBE_READ_REG(hw, IXGBE_RDRXCTL);
2835                 rdrxctl |= IXGBE_RDRXCTL_CRCSTRIP;
2836                 rdrxctl &= ~IXGBE_RDRXCTL_RSCFRSTSIZE;
2837                 IXGBE_WRITE_REG(hw, IXGBE_RDRXCTL, rdrxctl);
2838         }
2839
2840         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
2841                 /* Enable 82599 HW-RSC */
2842                 for (i = 0; i < adapter->num_rx_queues; i++)
2843                         ixgbe_configure_rscctl(adapter, i);
2844
2845                 /* Disable RSC for ACK packets */
2846                 IXGBE_WRITE_REG(hw, IXGBE_RSCDBU,
2847                    (IXGBE_RSCDBU_RSCACKDIS | IXGBE_READ_REG(hw, IXGBE_RSCDBU)));
2848         }
2849 }
2850
2851 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
2852 {
2853         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2854         struct ixgbe_hw *hw = &adapter->hw;
2855         int pool_ndx = adapter->num_vfs;
2856
2857         /* add VID to filter table */
2858         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, true);
2859 }
2860
2861 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
2862 {
2863         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2864         struct ixgbe_hw *hw = &adapter->hw;
2865         int pool_ndx = adapter->num_vfs;
2866
2867         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2868                 ixgbe_irq_disable(adapter);
2869
2870         vlan_group_set_device(adapter->vlgrp, vid, NULL);
2871
2872         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2873                 ixgbe_irq_enable(adapter);
2874
2875         /* remove VID from filter table */
2876         hw->mac.ops.set_vfta(&adapter->hw, vid, pool_ndx, false);
2877 }
2878
2879 /**
2880  * ixgbe_vlan_filter_disable - helper to disable hw vlan filtering
2881  * @adapter: driver data
2882  */
2883 static void ixgbe_vlan_filter_disable(struct ixgbe_adapter *adapter)
2884 {
2885         struct ixgbe_hw *hw = &adapter->hw;
2886         u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2887         int i, j;
2888
2889         switch (hw->mac.type) {
2890         case ixgbe_mac_82598EB:
2891                 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2892 #ifdef CONFIG_IXGBE_DCB
2893                 if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
2894                         vlnctrl &= ~IXGBE_VLNCTRL_VME;
2895 #endif
2896                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2897                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2898                 break;
2899         case ixgbe_mac_82599EB:
2900                 vlnctrl &= ~IXGBE_VLNCTRL_VFE;
2901                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2902                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2903 #ifdef CONFIG_IXGBE_DCB
2904                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
2905                         break;
2906 #endif
2907                 for (i = 0; i < adapter->num_rx_queues; i++) {
2908                         j = adapter->rx_ring[i]->reg_idx;
2909                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2910                         vlnctrl &= ~IXGBE_RXDCTL_VME;
2911                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2912                 }
2913                 break;
2914         default:
2915                 break;
2916         }
2917 }
2918
2919 /**
2920  * ixgbe_vlan_filter_enable - helper to enable hw vlan filtering
2921  * @adapter: driver data
2922  */
2923 static void ixgbe_vlan_filter_enable(struct ixgbe_adapter *adapter)
2924 {
2925         struct ixgbe_hw *hw = &adapter->hw;
2926         u32 vlnctrl = IXGBE_READ_REG(hw, IXGBE_VLNCTRL);
2927         int i, j;
2928
2929         switch (hw->mac.type) {
2930         case ixgbe_mac_82598EB:
2931                 vlnctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
2932                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2933                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2934                 break;
2935         case ixgbe_mac_82599EB:
2936                 vlnctrl |= IXGBE_VLNCTRL_VFE;
2937                 vlnctrl &= ~IXGBE_VLNCTRL_CFIEN;
2938                 IXGBE_WRITE_REG(hw, IXGBE_VLNCTRL, vlnctrl);
2939                 for (i = 0; i < adapter->num_rx_queues; i++) {
2940                         j = adapter->rx_ring[i]->reg_idx;
2941                         vlnctrl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
2942                         vlnctrl |= IXGBE_RXDCTL_VME;
2943                         IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), vlnctrl);
2944                 }
2945                 break;
2946         default:
2947                 break;
2948         }
2949 }
2950
2951 static void ixgbe_vlan_rx_register(struct net_device *netdev,
2952                                    struct vlan_group *grp)
2953 {
2954         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2955
2956         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2957                 ixgbe_irq_disable(adapter);
2958         adapter->vlgrp = grp;
2959
2960         /*
2961          * For a DCB driver, always enable VLAN tag stripping so we can
2962          * still receive traffic from a DCB-enabled host even if we're
2963          * not in DCB mode.
2964          */
2965         ixgbe_vlan_filter_enable(adapter);
2966
2967         ixgbe_vlan_rx_add_vid(netdev, 0);
2968
2969         if (!test_bit(__IXGBE_DOWN, &adapter->state))
2970                 ixgbe_irq_enable(adapter);
2971 }
2972
2973 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
2974 {
2975         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
2976
2977         if (adapter->vlgrp) {
2978                 u16 vid;
2979                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
2980                         if (!vlan_group_get_device(adapter->vlgrp, vid))
2981                                 continue;
2982                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
2983                 }
2984         }
2985 }
2986
2987 /**
2988  * ixgbe_write_uc_addr_list - write unicast addresses to RAR table
2989  * @netdev: network interface device structure
2990  *
2991  * Writes unicast address list to the RAR table.
2992  * Returns: -ENOMEM on failure/insufficient address space
2993  *                0 on no addresses written
2994  *                X on writing X addresses to the RAR table
2995  **/
2996 static int ixgbe_write_uc_addr_list(struct net_device *netdev)
2997 {
2998         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2999         struct ixgbe_hw *hw = &adapter->hw;
3000         unsigned int vfn = adapter->num_vfs;
3001         unsigned int rar_entries = hw->mac.num_rar_entries - (vfn + 1);
3002         int count = 0;
3003
3004         /* return ENOMEM indicating insufficient memory for addresses */
3005         if (netdev_uc_count(netdev) > rar_entries)
3006                 return -ENOMEM;
3007
3008         if (!netdev_uc_empty(netdev) && rar_entries) {
3009                 struct netdev_hw_addr *ha;
3010                 /* return error if we do not support writing to RAR table */
3011                 if (!hw->mac.ops.set_rar)
3012                         return -ENOMEM;
3013
3014                 netdev_for_each_uc_addr(ha, netdev) {
3015                         if (!rar_entries)
3016                                 break;
3017                         hw->mac.ops.set_rar(hw, rar_entries--, ha->addr,
3018                                             vfn, IXGBE_RAH_AV);
3019                         count++;
3020                 }
3021         }
3022         /* write the addresses in reverse order to avoid write combining */
3023         for (; rar_entries > 0 ; rar_entries--)
3024                 hw->mac.ops.clear_rar(hw, rar_entries);
3025
3026         return count;
3027 }
3028
3029 /**
3030  * ixgbe_set_rx_mode - Unicast, Multicast and Promiscuous mode set
3031  * @netdev: network interface device structure
3032  *
3033  * The set_rx_method entry point is called whenever the unicast/multicast
3034  * address list or the network interface flags are updated.  This routine is
3035  * responsible for configuring the hardware for proper unicast, multicast and
3036  * promiscuous mode.
3037  **/
3038 void ixgbe_set_rx_mode(struct net_device *netdev)
3039 {
3040         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3041         struct ixgbe_hw *hw = &adapter->hw;
3042         u32 fctrl, vmolr = IXGBE_VMOLR_BAM | IXGBE_VMOLR_AUPE;
3043         int count;
3044
3045         /* Check for Promiscuous and All Multicast modes */
3046
3047         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
3048
3049         /* set all bits that we expect to always be set */
3050         fctrl |= IXGBE_FCTRL_BAM;
3051         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
3052         fctrl |= IXGBE_FCTRL_PMCF;
3053
3054         /* clear the bits we are changing the status of */
3055         fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3056
3057         if (netdev->flags & IFF_PROMISC) {
3058                 hw->addr_ctrl.user_set_promisc = true;
3059                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
3060                 vmolr |= (IXGBE_VMOLR_ROPE | IXGBE_VMOLR_MPE);
3061                 /* don't hardware filter vlans in promisc mode */
3062                 ixgbe_vlan_filter_disable(adapter);
3063         } else {
3064                 if (netdev->flags & IFF_ALLMULTI) {
3065                         fctrl |= IXGBE_FCTRL_MPE;
3066                         vmolr |= IXGBE_VMOLR_MPE;
3067                 } else {
3068                         /*
3069                          * Write addresses to the MTA, if the attempt fails
3070                          * then we should just turn on promiscous mode so
3071                          * that we can at least receive multicast traffic
3072                          */
3073                         hw->mac.ops.update_mc_addr_list(hw, netdev);
3074                         vmolr |= IXGBE_VMOLR_ROMPE;
3075                 }
3076                 ixgbe_vlan_filter_enable(adapter);
3077                 hw->addr_ctrl.user_set_promisc = false;
3078                 /*
3079                  * Write addresses to available RAR registers, if there is not
3080                  * sufficient space to store all the addresses then enable
3081                  * unicast promiscous mode
3082                  */
3083                 count = ixgbe_write_uc_addr_list(netdev);
3084                 if (count < 0) {
3085                         fctrl |= IXGBE_FCTRL_UPE;
3086                         vmolr |= IXGBE_VMOLR_ROPE;
3087                 }
3088         }
3089
3090         if (adapter->num_vfs) {
3091                 ixgbe_restore_vf_multicasts(adapter);
3092                 vmolr |= IXGBE_READ_REG(hw, IXGBE_VMOLR(adapter->num_vfs)) &
3093                          ~(IXGBE_VMOLR_MPE | IXGBE_VMOLR_ROMPE |
3094                            IXGBE_VMOLR_ROPE);
3095                 IXGBE_WRITE_REG(hw, IXGBE_VMOLR(adapter->num_vfs), vmolr);
3096         }
3097
3098         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
3099 }
3100
3101 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
3102 {
3103         int q_idx;
3104         struct ixgbe_q_vector *q_vector;
3105         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3106
3107         /* legacy and MSI only use one vector */
3108         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3109                 q_vectors = 1;
3110
3111         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3112                 struct napi_struct *napi;
3113                 q_vector = adapter->q_vector[q_idx];
3114                 napi = &q_vector->napi;
3115                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3116                         if (!q_vector->rxr_count || !q_vector->txr_count) {
3117                                 if (q_vector->txr_count == 1)
3118                                         napi->poll = &ixgbe_clean_txonly;
3119                                 else if (q_vector->rxr_count == 1)
3120                                         napi->poll = &ixgbe_clean_rxonly;
3121                         }
3122                 }
3123
3124                 napi_enable(napi);
3125         }
3126 }
3127
3128 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
3129 {
3130         int q_idx;
3131         struct ixgbe_q_vector *q_vector;
3132         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3133
3134         /* legacy and MSI only use one vector */
3135         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
3136                 q_vectors = 1;
3137
3138         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
3139                 q_vector = adapter->q_vector[q_idx];
3140                 napi_disable(&q_vector->napi);
3141         }
3142 }
3143
3144 #ifdef CONFIG_IXGBE_DCB
3145 /*
3146  * ixgbe_configure_dcb - Configure DCB hardware
3147  * @adapter: ixgbe adapter struct
3148  *
3149  * This is called by the driver on open to configure the DCB hardware.
3150  * This is also called by the gennetlink interface when reconfiguring
3151  * the DCB state.
3152  */
3153 static void ixgbe_configure_dcb(struct ixgbe_adapter *adapter)
3154 {
3155         struct ixgbe_hw *hw = &adapter->hw;
3156         u32 txdctl;
3157         int i, j;
3158
3159         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED)) {
3160                 if (hw->mac.type == ixgbe_mac_82598EB)
3161                         netif_set_gso_max_size(adapter->netdev, 65536);
3162                 return;
3163         }
3164
3165         if (hw->mac.type == ixgbe_mac_82598EB)
3166                 netif_set_gso_max_size(adapter->netdev, 32768);
3167
3168         ixgbe_dcb_check_config(&adapter->dcb_cfg);
3169         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_TX_CONFIG);
3170         ixgbe_dcb_calculate_tc_credits(&adapter->dcb_cfg, DCB_RX_CONFIG);
3171
3172         /* reconfigure the hardware */
3173         ixgbe_dcb_hw_config(&adapter->hw, &adapter->dcb_cfg);
3174
3175         for (i = 0; i < adapter->num_tx_queues; i++) {
3176                 j = adapter->tx_ring[i]->reg_idx;
3177                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3178                 /* PThresh workaround for Tx hang with DFP enabled. */
3179                 txdctl |= 32;
3180                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3181         }
3182         /* Enable VLAN tag insert/strip */
3183         ixgbe_vlan_filter_enable(adapter);
3184
3185         hw->mac.ops.set_vfta(&adapter->hw, 0, 0, true);
3186 }
3187
3188 #endif
3189 static void ixgbe_configure(struct ixgbe_adapter *adapter)
3190 {
3191         struct net_device *netdev = adapter->netdev;
3192         struct ixgbe_hw *hw = &adapter->hw;
3193         int i;
3194
3195         ixgbe_set_rx_mode(netdev);
3196
3197         ixgbe_restore_vlan(adapter);
3198 #ifdef CONFIG_IXGBE_DCB
3199         ixgbe_configure_dcb(adapter);
3200 #endif
3201
3202 #ifdef IXGBE_FCOE
3203         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
3204                 ixgbe_configure_fcoe(adapter);
3205
3206 #endif /* IXGBE_FCOE */
3207         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
3208                 for (i = 0; i < adapter->num_tx_queues; i++)
3209                         adapter->tx_ring[i]->atr_sample_rate =
3210                                                        adapter->atr_sample_rate;
3211                 ixgbe_init_fdir_signature_82599(hw, adapter->fdir_pballoc);
3212         } else if (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE) {
3213                 ixgbe_init_fdir_perfect_82599(hw, adapter->fdir_pballoc);
3214         }
3215
3216         ixgbe_configure_tx(adapter);
3217         ixgbe_configure_rx(adapter);
3218         for (i = 0; i < adapter->num_rx_queues; i++)
3219                 ixgbe_alloc_rx_buffers(adapter, adapter->rx_ring[i],
3220                                        (adapter->rx_ring[i]->count - 1));
3221 }
3222
3223 static inline bool ixgbe_is_sfp(struct ixgbe_hw *hw)
3224 {
3225         switch (hw->phy.type) {
3226         case ixgbe_phy_sfp_avago:
3227         case ixgbe_phy_sfp_ftl:
3228         case ixgbe_phy_sfp_intel:
3229         case ixgbe_phy_sfp_unknown:
3230         case ixgbe_phy_sfp_passive_tyco:
3231         case ixgbe_phy_sfp_passive_unknown:
3232         case ixgbe_phy_sfp_active_unknown:
3233         case ixgbe_phy_sfp_ftl_active:
3234                 return true;
3235         default:
3236                 return false;
3237         }
3238 }
3239
3240 /**
3241  * ixgbe_sfp_link_config - set up SFP+ link
3242  * @adapter: pointer to private adapter struct
3243  **/
3244 static void ixgbe_sfp_link_config(struct ixgbe_adapter *adapter)
3245 {
3246         struct ixgbe_hw *hw = &adapter->hw;
3247
3248                 if (hw->phy.multispeed_fiber) {
3249                         /*
3250                          * In multispeed fiber setups, the device may not have
3251                          * had a physical connection when the driver loaded.
3252                          * If that's the case, the initial link configuration
3253                          * couldn't get the MAC into 10G or 1G mode, so we'll
3254                          * never have a link status change interrupt fire.
3255                          * We need to try and force an autonegotiation
3256                          * session, then bring up link.
3257                          */
3258                         hw->mac.ops.setup_sfp(hw);
3259                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
3260                                 schedule_work(&adapter->multispeed_fiber_task);
3261                 } else {
3262                         /*
3263                          * Direct Attach Cu and non-multispeed fiber modules
3264                          * still need to be configured properly prior to
3265                          * attempting link.
3266                          */
3267                         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_MOD_TASK))
3268                                 schedule_work(&adapter->sfp_config_module_task);
3269                 }
3270 }
3271
3272 /**
3273  * ixgbe_non_sfp_link_config - set up non-SFP+ link
3274  * @hw: pointer to private hardware struct
3275  *
3276  * Returns 0 on success, negative on failure
3277  **/
3278 static int ixgbe_non_sfp_link_config(struct ixgbe_hw *hw)
3279 {
3280         u32 autoneg;
3281         bool negotiation, link_up = false;
3282         u32 ret = IXGBE_ERR_LINK_SETUP;
3283
3284         if (hw->mac.ops.check_link)
3285                 ret = hw->mac.ops.check_link(hw, &autoneg, &link_up, false);
3286
3287         if (ret)
3288                 goto link_cfg_out;
3289
3290         if (hw->mac.ops.get_link_capabilities)
3291                 ret = hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
3292         if (ret)
3293                 goto link_cfg_out;
3294
3295         if (hw->mac.ops.setup_link)
3296                 ret = hw->mac.ops.setup_link(hw, autoneg, negotiation, link_up);
3297 link_cfg_out:
3298         return ret;
3299 }
3300
3301 #define IXGBE_MAX_RX_DESC_POLL 10
3302 static inline void ixgbe_rx_desc_queue_enable(struct ixgbe_adapter *adapter,
3303                                               int rxr)
3304 {
3305         int j = adapter->rx_ring[rxr]->reg_idx;
3306         int k;
3307
3308         for (k = 0; k < IXGBE_MAX_RX_DESC_POLL; k++) {
3309                 if (IXGBE_READ_REG(&adapter->hw,
3310                                    IXGBE_RXDCTL(j)) & IXGBE_RXDCTL_ENABLE)
3311                         break;
3312                 else
3313                         msleep(1);
3314         }
3315         if (k >= IXGBE_MAX_RX_DESC_POLL) {
3316                 e_err(drv, "RXDCTL.ENABLE on Rx queue %d not set within "
3317                       "the polling period\n", rxr);
3318         }
3319         ixgbe_release_rx_desc(&adapter->hw, adapter->rx_ring[rxr],
3320                               (adapter->rx_ring[rxr]->count - 1));
3321 }
3322
3323 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
3324 {
3325         struct net_device *netdev = adapter->netdev;
3326         struct ixgbe_hw *hw = &adapter->hw;
3327         int i, j = 0;
3328         int num_rx_rings = adapter->num_rx_queues;
3329         int err;
3330         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
3331         u32 txdctl, rxdctl, mhadd;
3332         u32 dmatxctl;
3333         u32 gpie;
3334         u32 ctrl_ext;
3335
3336         ixgbe_get_hw_control(adapter);
3337
3338         if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
3339             (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
3340                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3341                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
3342                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
3343                 } else {
3344                         /* MSI only */
3345                         gpie = 0;
3346                 }
3347                 if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
3348                         gpie &= ~IXGBE_GPIE_VTMODE_MASK;
3349                         gpie |= IXGBE_GPIE_VTMODE_64;
3350                 }
3351                 /* XXX: to interrupt immediately for EICS writes, enable this */
3352                 /* gpie |= IXGBE_GPIE_EIMEN; */
3353                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3354         }
3355
3356         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3357                 /*
3358                  * use EIAM to auto-mask when MSI-X interrupt is asserted
3359                  * this saves a register write for every interrupt
3360                  */
3361                 switch (hw->mac.type) {
3362                 case ixgbe_mac_82598EB:
3363                         IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3364                         break;
3365                 default:
3366                 case ixgbe_mac_82599EB:
3367                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(0), 0xFFFFFFFF);
3368                         IXGBE_WRITE_REG(hw, IXGBE_EIAM_EX(1), 0xFFFFFFFF);
3369                         break;
3370                 }
3371         } else {
3372                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
3373                  * specifically only auto mask tx and rx interrupts */
3374                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
3375         }
3376
3377         /* Enable Thermal over heat sensor interrupt */
3378         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE) {
3379                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3380                 gpie |= IXGBE_SDP0_GPIEN;
3381                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3382         }
3383
3384         /* Enable fan failure interrupt if media type is copper */
3385         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3386                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3387                 gpie |= IXGBE_SDP1_GPIEN;
3388                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3389         }
3390
3391         if (hw->mac.type == ixgbe_mac_82599EB) {
3392                 gpie = IXGBE_READ_REG(hw, IXGBE_GPIE);
3393                 gpie |= IXGBE_SDP1_GPIEN;
3394                 gpie |= IXGBE_SDP2_GPIEN;
3395                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
3396         }
3397
3398 #ifdef IXGBE_FCOE
3399         /* adjust max frame to be able to do baby jumbo for FCoE */
3400         if ((netdev->features & NETIF_F_FCOE_MTU) &&
3401             (max_frame < IXGBE_FCOE_JUMBO_FRAME_SIZE))
3402                 max_frame = IXGBE_FCOE_JUMBO_FRAME_SIZE;
3403
3404 #endif /* IXGBE_FCOE */
3405         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
3406         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
3407                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
3408                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
3409
3410                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
3411         }
3412
3413         if (hw->mac.type == ixgbe_mac_82599EB) {
3414                 /* DMATXCTL.EN must be set after all Tx queue config is done */
3415                 dmatxctl = IXGBE_READ_REG(hw, IXGBE_DMATXCTL);
3416                 dmatxctl |= IXGBE_DMATXCTL_TE;
3417                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL, dmatxctl);
3418         }
3419         for (i = 0; i < adapter->num_tx_queues; i++) {
3420                 j = adapter->tx_ring[i]->reg_idx;
3421                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3422                 if (adapter->rx_itr_setting == 0) {
3423                         /* cannot set wthresh when itr==0 */
3424                         txdctl &= ~0x007F0000;
3425                 } else {
3426                         /* enable WTHRESH=8 descriptors, to encourage burst writeback */
3427                         txdctl |= (8 << 16);
3428                 }
3429                 txdctl |= IXGBE_TXDCTL_ENABLE;
3430                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
3431                 if (hw->mac.type == ixgbe_mac_82599EB) {
3432                         int wait_loop = 10;
3433                         /* poll for Tx Enable ready */
3434                         do {
3435                                 msleep(1);
3436                                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3437                         } while (--wait_loop &&
3438                                  !(txdctl & IXGBE_TXDCTL_ENABLE));
3439                         if (!wait_loop)
3440                                 e_err(drv, "Could not enable Tx Queue %d\n", j);
3441                 }
3442         }
3443
3444         for (i = 0; i < num_rx_rings; i++) {
3445                 j = adapter->rx_ring[i]->reg_idx;
3446                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
3447                 /* enable PTHRESH=32 descriptors (half the internal cache)
3448                  * and HTHRESH=0 descriptors (to minimize latency on fetch),
3449                  * this also removes a pesky rx_no_buffer_count increment */
3450                 rxdctl |= 0x0020;
3451                 rxdctl |= IXGBE_RXDCTL_ENABLE;
3452                 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
3453                 if (hw->mac.type == ixgbe_mac_82599EB)
3454                         ixgbe_rx_desc_queue_enable(adapter, i);
3455         }
3456         /* enable all receives */
3457         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3458         if (hw->mac.type == ixgbe_mac_82598EB)
3459                 rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
3460         else
3461                 rxdctl |= IXGBE_RXCTRL_RXEN;
3462         hw->mac.ops.enable_rx_dma(hw, rxdctl);
3463
3464         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
3465                 ixgbe_configure_msix(adapter);
3466         else
3467                 ixgbe_configure_msi_and_legacy(adapter);
3468
3469         /* enable the optics */
3470         if (hw->phy.multispeed_fiber)
3471                 hw->mac.ops.enable_tx_laser(hw);
3472
3473         clear_bit(__IXGBE_DOWN, &adapter->state);
3474         ixgbe_napi_enable_all(adapter);
3475
3476         /* clear any pending interrupts, may auto mask */
3477         IXGBE_READ_REG(hw, IXGBE_EICR);
3478
3479         ixgbe_irq_enable(adapter);
3480
3481         /*
3482          * If this adapter has a fan, check to see if we had a failure
3483          * before we enabled the interrupt.
3484          */
3485         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
3486                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
3487                 if (esdp & IXGBE_ESDP_SDP1)
3488                         e_crit(drv, "Fan has stopped, replace the adapter\n");
3489         }
3490
3491         /*
3492          * For hot-pluggable SFP+ devices, a new SFP+ module may have
3493          * arrived before interrupts were enabled but after probe.  Such
3494          * devices wouldn't have their type identified yet. We need to
3495          * kick off the SFP+ module setup first, then try to bring up link.
3496          * If we're not hot-pluggable SFP+, we just need to configure link
3497          * and bring it up.
3498          */
3499         if (hw->phy.type == ixgbe_phy_unknown) {
3500                 err = hw->phy.ops.identify(hw);
3501                 if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
3502                         /*
3503                          * Take the device down and schedule the sfp tasklet
3504                          * which will unregister_netdev and log it.
3505                          */
3506                         ixgbe_down(adapter);
3507                         schedule_work(&adapter->sfp_config_module_task);
3508                         return err;
3509                 }
3510         }
3511
3512         if (ixgbe_is_sfp(hw)) {
3513                 ixgbe_sfp_link_config(adapter);
3514         } else {
3515                 err = ixgbe_non_sfp_link_config(hw);
3516                 if (err)
3517                         e_err(probe, "link_config FAILED %d\n", err);
3518         }
3519
3520         for (i = 0; i < adapter->num_tx_queues; i++)
3521                 set_bit(__IXGBE_FDIR_INIT_DONE,
3522                         &(adapter->tx_ring[i]->reinit_state));
3523
3524         /* enable transmits */
3525         netif_tx_start_all_queues(netdev);
3526
3527         /* bring the link up in the watchdog, this could race with our first
3528          * link up interrupt but shouldn't be a problem */
3529         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
3530         adapter->link_check_timeout = jiffies;
3531         mod_timer(&adapter->watchdog_timer, jiffies);
3532
3533         /* Set PF Reset Done bit so PF/VF Mail Ops can work */
3534         ctrl_ext = IXGBE_READ_REG(hw, IXGBE_CTRL_EXT);
3535         ctrl_ext |= IXGBE_CTRL_EXT_PFRSTD;
3536         IXGBE_WRITE_REG(hw, IXGBE_CTRL_EXT, ctrl_ext);
3537
3538         return 0;
3539 }
3540
3541 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
3542 {
3543         WARN_ON(in_interrupt());
3544         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
3545                 msleep(1);
3546         ixgbe_down(adapter);
3547         /*
3548          * If SR-IOV enabled then wait a bit before bringing the adapter
3549          * back up to give the VFs time to respond to the reset.  The
3550          * two second wait is based upon the watchdog timer cycle in
3551          * the VF driver.
3552          */
3553         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
3554                 msleep(2000);
3555         ixgbe_up(adapter);
3556         clear_bit(__IXGBE_RESETTING, &adapter->state);
3557 }
3558
3559 int ixgbe_up(struct ixgbe_adapter *adapter)
3560 {
3561         /* hardware has been reset, we need to reload some things */
3562         ixgbe_configure(adapter);
3563
3564         return ixgbe_up_complete(adapter);
3565 }
3566
3567 void ixgbe_reset(struct ixgbe_adapter *adapter)
3568 {
3569         struct ixgbe_hw *hw = &adapter->hw;
3570         int err;
3571
3572         err = hw->mac.ops.init_hw(hw);
3573         switch (err) {
3574         case 0:
3575         case IXGBE_ERR_SFP_NOT_PRESENT:
3576                 break;
3577         case IXGBE_ERR_MASTER_REQUESTS_PENDING:
3578                 e_dev_err("master disable timed out\n");
3579                 break;
3580         case IXGBE_ERR_EEPROM_VERSION:
3581                 /* We are running on a pre-production device, log a warning */
3582                 e_dev_warn("This device is a pre-production adapter/LOM. "
3583                            "Please be aware there may be issuesassociated with "
3584                            "your hardware.  If you are experiencing problems "
3585                            "please contact your Intel or hardware "
3586                            "representative who provided you with this "
3587                            "hardware.\n");
3588                 break;
3589         default:
3590                 e_dev_err("Hardware Error: %d\n", err);
3591         }
3592
3593         /* reprogram the RAR[0] in case user changed it. */
3594         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
3595                             IXGBE_RAH_AV);
3596 }
3597
3598 /**
3599  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
3600  * @adapter: board private structure
3601  * @rx_ring: ring to free buffers from
3602  **/
3603 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
3604                                 struct ixgbe_ring *rx_ring)
3605 {
3606         struct pci_dev *pdev = adapter->pdev;
3607         unsigned long size;
3608         unsigned int i;
3609
3610         /* Free all the Rx ring sk_buffs */
3611
3612         for (i = 0; i < rx_ring->count; i++) {
3613                 struct ixgbe_rx_buffer *rx_buffer_info;
3614
3615                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
3616                 if (rx_buffer_info->dma) {
3617                         dma_unmap_single(&pdev->dev, rx_buffer_info->dma,
3618                                          rx_ring->rx_buf_len,
3619                                          DMA_FROM_DEVICE);
3620                         rx_buffer_info->dma = 0;
3621                 }
3622                 if (rx_buffer_info->skb) {
3623                         struct sk_buff *skb = rx_buffer_info->skb;
3624                         rx_buffer_info->skb = NULL;
3625                         do {
3626                                 struct sk_buff *this = skb;
3627                                 if (IXGBE_RSC_CB(this)->delay_unmap) {
3628                                         dma_unmap_single(&pdev->dev,
3629                                                          IXGBE_RSC_CB(this)->dma,
3630                                                          rx_ring->rx_buf_len,
3631                                                          DMA_FROM_DEVICE);
3632                                         IXGBE_RSC_CB(this)->dma = 0;
3633                                         IXGBE_RSC_CB(skb)->delay_unmap = false;
3634                                 }
3635                                 skb = skb->prev;
3636                                 dev_kfree_skb(this);
3637                         } while (skb);
3638                 }
3639                 if (!rx_buffer_info->page)
3640                         continue;
3641                 if (rx_buffer_info->page_dma) {
3642                         dma_unmap_page(&pdev->dev, rx_buffer_info->page_dma,
3643                                        PAGE_SIZE / 2, DMA_FROM_DEVICE);
3644                         rx_buffer_info->page_dma = 0;
3645                 }
3646                 put_page(rx_buffer_info->page);
3647                 rx_buffer_info->page = NULL;
3648                 rx_buffer_info->page_offset = 0;
3649         }
3650
3651         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
3652         memset(rx_ring->rx_buffer_info, 0, size);
3653
3654         /* Zero out the descriptor ring */
3655         memset(rx_ring->desc, 0, rx_ring->size);
3656
3657         rx_ring->next_to_clean = 0;
3658         rx_ring->next_to_use = 0;
3659
3660         if (rx_ring->head)
3661                 writel(0, adapter->hw.hw_addr + rx_ring->head);
3662         if (rx_ring->tail)
3663                 writel(0, adapter->hw.hw_addr + rx_ring->tail);
3664 }
3665
3666 /**
3667  * ixgbe_clean_tx_ring - Free Tx Buffers
3668  * @adapter: board private structure
3669  * @tx_ring: ring to be cleaned
3670  **/
3671 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
3672                                 struct ixgbe_ring *tx_ring)
3673 {
3674         struct ixgbe_tx_buffer *tx_buffer_info;
3675         unsigned long size;
3676         unsigned int i;
3677
3678         /* Free all the Tx ring sk_buffs */
3679
3680         for (i = 0; i < tx_ring->count; i++) {
3681                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3682                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
3683         }
3684
3685         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
3686         memset(tx_ring->tx_buffer_info, 0, size);
3687
3688         /* Zero out the descriptor ring */
3689         memset(tx_ring->desc, 0, tx_ring->size);
3690
3691         tx_ring->next_to_use = 0;
3692         tx_ring->next_to_clean = 0;
3693
3694         if (tx_ring->head)
3695                 writel(0, adapter->hw.hw_addr + tx_ring->head);
3696         if (tx_ring->tail)
3697                 writel(0, adapter->hw.hw_addr + tx_ring->tail);
3698 }
3699
3700 /**
3701  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
3702  * @adapter: board private structure
3703  **/
3704 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
3705 {
3706         int i;
3707
3708         for (i = 0; i < adapter->num_rx_queues; i++)
3709                 ixgbe_clean_rx_ring(adapter, adapter->rx_ring[i]);
3710 }
3711
3712 /**
3713  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
3714  * @adapter: board private structure
3715  **/
3716 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
3717 {
3718         int i;
3719
3720         for (i = 0; i < adapter->num_tx_queues; i++)
3721                 ixgbe_clean_tx_ring(adapter, adapter->tx_ring[i]);
3722 }
3723
3724 void ixgbe_down(struct ixgbe_adapter *adapter)
3725 {
3726         struct net_device *netdev = adapter->netdev;
3727         struct ixgbe_hw *hw = &adapter->hw;
3728         u32 rxctrl;
3729         u32 txdctl;
3730         int i, j;
3731
3732         /* signal that we are down to the interrupt handler */
3733         set_bit(__IXGBE_DOWN, &adapter->state);
3734
3735         /* disable receive for all VFs and wait one second */
3736         if (adapter->num_vfs) {
3737                 /* ping all the active vfs to let them know we are going down */
3738                 ixgbe_ping_all_vfs(adapter);
3739
3740                 /* Disable all VFTE/VFRE TX/RX */
3741                 ixgbe_disable_tx_rx(adapter);
3742
3743                 /* Mark all the VFs as inactive */
3744                 for (i = 0 ; i < adapter->num_vfs; i++)
3745                         adapter->vfinfo[i].clear_to_send = 0;
3746         }
3747
3748         /* disable receives */
3749         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
3750         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
3751
3752         IXGBE_WRITE_FLUSH(hw);
3753         msleep(10);
3754
3755         netif_tx_stop_all_queues(netdev);
3756
3757         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
3758         del_timer_sync(&adapter->sfp_timer);
3759         del_timer_sync(&adapter->watchdog_timer);
3760         cancel_work_sync(&adapter->watchdog_task);
3761
3762         netif_carrier_off(netdev);
3763         netif_tx_disable(netdev);
3764
3765         ixgbe_irq_disable(adapter);
3766
3767         ixgbe_napi_disable_all(adapter);
3768
3769         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3770             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
3771                 cancel_work_sync(&adapter->fdir_reinit_task);
3772
3773         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
3774                 cancel_work_sync(&adapter->check_overtemp_task);
3775
3776         /* disable transmits in the hardware now that interrupts are off */
3777         for (i = 0; i < adapter->num_tx_queues; i++) {
3778                 j = adapter->tx_ring[i]->reg_idx;
3779                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
3780                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j),
3781                                 (txdctl & ~IXGBE_TXDCTL_ENABLE));
3782         }
3783         /* Disable the Tx DMA engine on 82599 */
3784         if (hw->mac.type == ixgbe_mac_82599EB)
3785                 IXGBE_WRITE_REG(hw, IXGBE_DMATXCTL,
3786                                 (IXGBE_READ_REG(hw, IXGBE_DMATXCTL) &
3787                                  ~IXGBE_DMATXCTL_TE));
3788
3789         /* power down the optics */
3790         if (hw->phy.multispeed_fiber)
3791                 hw->mac.ops.disable_tx_laser(hw);
3792
3793         /* clear n-tuple filters that are cached */
3794         ethtool_ntuple_flush(netdev);
3795
3796         if (!pci_channel_offline(adapter->pdev))
3797                 ixgbe_reset(adapter);
3798         ixgbe_clean_all_tx_rings(adapter);
3799         ixgbe_clean_all_rx_rings(adapter);
3800
3801 #ifdef CONFIG_IXGBE_DCA
3802         /* since we reset the hardware DCA settings were cleared */
3803         ixgbe_setup_dca(adapter);
3804 #endif
3805 }
3806
3807 /**
3808  * ixgbe_poll - NAPI Rx polling callback
3809  * @napi: structure for representing this polling device
3810  * @budget: how many packets driver is allowed to clean
3811  *
3812  * This function is used for legacy and MSI, NAPI mode
3813  **/
3814 static int ixgbe_poll(struct napi_struct *napi, int budget)
3815 {
3816         struct ixgbe_q_vector *q_vector =
3817                                 container_of(napi, struct ixgbe_q_vector, napi);
3818         struct ixgbe_adapter *adapter = q_vector->adapter;
3819         int tx_clean_complete, work_done = 0;
3820
3821 #ifdef CONFIG_IXGBE_DCA
3822         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3823                 ixgbe_update_tx_dca(adapter, adapter->tx_ring[0]);
3824                 ixgbe_update_rx_dca(adapter, adapter->rx_ring[0]);
3825         }
3826 #endif
3827
3828         tx_clean_complete = ixgbe_clean_tx_irq(q_vector, adapter->tx_ring[0]);
3829         ixgbe_clean_rx_irq(q_vector, adapter->rx_ring[0], &work_done, budget);
3830
3831         if (!tx_clean_complete)
3832                 work_done = budget;
3833
3834         /* If budget not fully consumed, exit the polling mode */
3835         if (work_done < budget) {
3836                 napi_complete(napi);
3837                 if (adapter->rx_itr_setting & 1)
3838                         ixgbe_set_itr(adapter);
3839                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
3840                         ixgbe_irq_enable_queues(adapter, IXGBE_EIMS_RTX_QUEUE);
3841         }
3842         return work_done;
3843 }
3844
3845 /**
3846  * ixgbe_tx_timeout - Respond to a Tx Hang
3847  * @netdev: network interface device structure
3848  **/
3849 static void ixgbe_tx_timeout(struct net_device *netdev)
3850 {
3851         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3852
3853         /* Do the reset outside of interrupt context */
3854         schedule_work(&adapter->reset_task);
3855 }
3856
3857 static void ixgbe_reset_task(struct work_struct *work)
3858 {
3859         struct ixgbe_adapter *adapter;
3860         adapter = container_of(work, struct ixgbe_adapter, reset_task);
3861
3862         /* If we're already down or resetting, just bail */
3863         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
3864             test_bit(__IXGBE_RESETTING, &adapter->state))
3865                 return;
3866
3867         adapter->tx_timeout_count++;
3868
3869         ixgbe_dump(adapter);
3870         netdev_err(adapter->netdev, "Reset adapter\n");
3871         ixgbe_reinit_locked(adapter);
3872 }
3873
3874 #ifdef CONFIG_IXGBE_DCB
3875 static inline bool ixgbe_set_dcb_queues(struct ixgbe_adapter *adapter)
3876 {
3877         bool ret = false;
3878         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_DCB];
3879
3880         if (!(adapter->flags & IXGBE_FLAG_DCB_ENABLED))
3881                 return ret;
3882
3883         f->mask = 0x7 << 3;
3884         adapter->num_rx_queues = f->indices;
3885         adapter->num_tx_queues = f->indices;
3886         ret = true;
3887
3888         return ret;
3889 }
3890 #endif
3891
3892 /**
3893  * ixgbe_set_rss_queues: Allocate queues for RSS
3894  * @adapter: board private structure to initialize
3895  *
3896  * This is our "base" multiqueue mode.  RSS (Receive Side Scaling) will try
3897  * to allocate one Rx queue per CPU, and if available, one Tx queue per CPU.
3898  *
3899  **/
3900 static inline bool ixgbe_set_rss_queues(struct ixgbe_adapter *adapter)
3901 {
3902         bool ret = false;
3903         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_RSS];
3904
3905         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3906                 f->mask = 0xF;
3907                 adapter->num_rx_queues = f->indices;
3908                 adapter->num_tx_queues = f->indices;
3909                 ret = true;
3910         } else {
3911                 ret = false;
3912         }
3913
3914         return ret;
3915 }
3916
3917 /**
3918  * ixgbe_set_fdir_queues: Allocate queues for Flow Director
3919  * @adapter: board private structure to initialize
3920  *
3921  * Flow Director is an advanced Rx filter, attempting to get Rx flows back
3922  * to the original CPU that initiated the Tx session.  This runs in addition
3923  * to RSS, so if a packet doesn't match an FDIR filter, we can still spread the
3924  * Rx load across CPUs using RSS.
3925  *
3926  **/
3927 static bool inline ixgbe_set_fdir_queues(struct ixgbe_adapter *adapter)
3928 {
3929         bool ret = false;
3930         struct ixgbe_ring_feature *f_fdir = &adapter->ring_feature[RING_F_FDIR];
3931
3932         f_fdir->indices = min((int)num_online_cpus(), f_fdir->indices);
3933         f_fdir->mask = 0;
3934
3935         /* Flow Director must have RSS enabled */
3936         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
3937             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
3938              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)))) {
3939                 adapter->num_tx_queues = f_fdir->indices;
3940                 adapter->num_rx_queues = f_fdir->indices;
3941                 ret = true;
3942         } else {
3943                 adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
3944                 adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
3945         }
3946         return ret;
3947 }
3948
3949 #ifdef IXGBE_FCOE
3950 /**
3951  * ixgbe_set_fcoe_queues: Allocate queues for Fiber Channel over Ethernet (FCoE)
3952  * @adapter: board private structure to initialize
3953  *
3954  * FCoE RX FCRETA can use up to 8 rx queues for up to 8 different exchanges.
3955  * The ring feature mask is not used as a mask for FCoE, as it can take any 8
3956  * rx queues out of the max number of rx queues, instead, it is used as the
3957  * index of the first rx queue used by FCoE.
3958  *
3959  **/
3960 static inline bool ixgbe_set_fcoe_queues(struct ixgbe_adapter *adapter)
3961 {
3962         bool ret = false;
3963         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
3964
3965         f->indices = min((int)num_online_cpus(), f->indices);
3966         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
3967                 adapter->num_rx_queues = 1;
3968                 adapter->num_tx_queues = 1;
3969 #ifdef CONFIG_IXGBE_DCB
3970                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
3971                         e_info(probe, "FCoE enabled with DCB\n");
3972                         ixgbe_set_dcb_queues(adapter);
3973                 }
3974 #endif
3975                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
3976                         e_info(probe, "FCoE enabled with RSS\n");
3977                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
3978                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
3979                                 ixgbe_set_fdir_queues(adapter);
3980                         else
3981                                 ixgbe_set_rss_queues(adapter);
3982                 }
3983                 /* adding FCoE rx rings to the end */
3984                 f->mask = adapter->num_rx_queues;
3985                 adapter->num_rx_queues += f->indices;
3986                 adapter->num_tx_queues += f->indices;
3987
3988                 ret = true;
3989         }
3990
3991         return ret;
3992 }
3993
3994 #endif /* IXGBE_FCOE */
3995 /**
3996  * ixgbe_set_sriov_queues: Allocate queues for IOV use
3997  * @adapter: board private structure to initialize
3998  *
3999  * IOV doesn't actually use anything, so just NAK the
4000  * request for now and let the other queue routines
4001  * figure out what to do.
4002  */
4003 static inline bool ixgbe_set_sriov_queues(struct ixgbe_adapter *adapter)
4004 {
4005         return false;
4006 }
4007
4008 /*
4009  * ixgbe_set_num_queues: Allocate queues for device, feature dependant
4010  * @adapter: board private structure to initialize
4011  *
4012  * This is the top level queue allocation routine.  The order here is very
4013  * important, starting with the "most" number of features turned on at once,
4014  * and ending with the smallest set of features.  This way large combinations
4015  * can be allocated if they're turned on, and smaller combinations are the
4016  * fallthrough conditions.
4017  *
4018  **/
4019 static void ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
4020 {
4021         /* Start with base case */
4022         adapter->num_rx_queues = 1;
4023         adapter->num_tx_queues = 1;
4024         adapter->num_rx_pools = adapter->num_rx_queues;
4025         adapter->num_rx_queues_per_pool = 1;
4026
4027         if (ixgbe_set_sriov_queues(adapter))
4028                 return;
4029
4030 #ifdef IXGBE_FCOE
4031         if (ixgbe_set_fcoe_queues(adapter))
4032                 goto done;
4033
4034 #endif /* IXGBE_FCOE */
4035 #ifdef CONFIG_IXGBE_DCB
4036         if (ixgbe_set_dcb_queues(adapter))
4037                 goto done;
4038
4039 #endif
4040         if (ixgbe_set_fdir_queues(adapter))
4041                 goto done;
4042
4043         if (ixgbe_set_rss_queues(adapter))
4044                 goto done;
4045
4046         /* fallback to base case */
4047         adapter->num_rx_queues = 1;
4048         adapter->num_tx_queues = 1;
4049
4050 done:
4051         /* Notify the stack of the (possibly) reduced Tx Queue count. */
4052         netif_set_real_num_tx_queues(adapter->netdev, adapter->num_tx_queues);
4053 }
4054
4055 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
4056                                        int vectors)
4057 {
4058         int err, vector_threshold;
4059
4060         /* We'll want at least 3 (vector_threshold):
4061          * 1) TxQ[0] Cleanup
4062          * 2) RxQ[0] Cleanup
4063          * 3) Other (Link Status Change, etc.)
4064          * 4) TCP Timer (optional)
4065          */
4066         vector_threshold = MIN_MSIX_COUNT;
4067
4068         /* The more we get, the more we will assign to Tx/Rx Cleanup
4069          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
4070          * Right now, we simply care about how many we'll get; we'll
4071          * set them up later while requesting irq's.
4072          */
4073         while (vectors >= vector_threshold) {
4074                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
4075                                       vectors);
4076                 if (!err) /* Success in acquiring all requested vectors. */
4077                         break;
4078                 else if (err < 0)
4079                         vectors = 0; /* Nasty failure, quit now */
4080                 else /* err == number of vectors we should try again with */
4081                         vectors = err;
4082         }
4083
4084         if (vectors < vector_threshold) {
4085                 /* Can't allocate enough MSI-X interrupts?  Oh well.
4086                  * This just means we'll go with either a single MSI
4087                  * vector or fall back to legacy interrupts.
4088                  */
4089                 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4090                              "Unable to allocate MSI-X interrupts\n");
4091                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4092                 kfree(adapter->msix_entries);
4093                 adapter->msix_entries = NULL;
4094         } else {
4095                 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
4096                 /*
4097                  * Adjust for only the vectors we'll use, which is minimum
4098                  * of max_msix_q_vectors + NON_Q_VECTORS, or the number of
4099                  * vectors we were allocated.
4100                  */
4101                 adapter->num_msix_vectors = min(vectors,
4102                                    adapter->max_msix_q_vectors + NON_Q_VECTORS);
4103         }
4104 }
4105
4106 /**
4107  * ixgbe_cache_ring_rss - Descriptor ring to register mapping for RSS
4108  * @adapter: board private structure to initialize
4109  *
4110  * Cache the descriptor ring offsets for RSS to the assigned rings.
4111  *
4112  **/
4113 static inline bool ixgbe_cache_ring_rss(struct ixgbe_adapter *adapter)
4114 {
4115         int i;
4116         bool ret = false;
4117
4118         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4119                 for (i = 0; i < adapter->num_rx_queues; i++)
4120                         adapter->rx_ring[i]->reg_idx = i;
4121                 for (i = 0; i < adapter->num_tx_queues; i++)
4122                         adapter->tx_ring[i]->reg_idx = i;
4123                 ret = true;
4124         } else {
4125                 ret = false;
4126         }
4127
4128         return ret;
4129 }
4130
4131 #ifdef CONFIG_IXGBE_DCB
4132 /**
4133  * ixgbe_cache_ring_dcb - Descriptor ring to register mapping for DCB
4134  * @adapter: board private structure to initialize
4135  *
4136  * Cache the descriptor ring offsets for DCB to the assigned rings.
4137  *
4138  **/
4139 static inline bool ixgbe_cache_ring_dcb(struct ixgbe_adapter *adapter)
4140 {
4141         int i;
4142         bool ret = false;
4143         int dcb_i = adapter->ring_feature[RING_F_DCB].indices;
4144
4145         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4146                 if (adapter->hw.mac.type == ixgbe_mac_82598EB) {
4147                         /* the number of queues is assumed to be symmetric */
4148                         for (i = 0; i < dcb_i; i++) {
4149                                 adapter->rx_ring[i]->reg_idx = i << 3;
4150                                 adapter->tx_ring[i]->reg_idx = i << 2;
4151                         }
4152                         ret = true;
4153                 } else if (adapter->hw.mac.type == ixgbe_mac_82599EB) {
4154                         if (dcb_i == 8) {
4155                                 /*
4156                                  * Tx TC0 starts at: descriptor queue 0
4157                                  * Tx TC1 starts at: descriptor queue 32
4158                                  * Tx TC2 starts at: descriptor queue 64
4159                                  * Tx TC3 starts at: descriptor queue 80
4160                                  * Tx TC4 starts at: descriptor queue 96
4161                                  * Tx TC5 starts at: descriptor queue 104
4162                                  * Tx TC6 starts at: descriptor queue 112
4163                                  * Tx TC7 starts at: descriptor queue 120
4164                                  *
4165                                  * Rx TC0-TC7 are offset by 16 queues each
4166                                  */
4167                                 for (i = 0; i < 3; i++) {
4168                                         adapter->tx_ring[i]->reg_idx = i << 5;
4169                                         adapter->rx_ring[i]->reg_idx = i << 4;
4170                                 }
4171                                 for ( ; i < 5; i++) {
4172                                         adapter->tx_ring[i]->reg_idx =
4173                                                                  ((i + 2) << 4);
4174                                         adapter->rx_ring[i]->reg_idx = i << 4;
4175                                 }
4176                                 for ( ; i < dcb_i; i++) {
4177                                         adapter->tx_ring[i]->reg_idx =
4178                                                                  ((i + 8) << 3);
4179                                         adapter->rx_ring[i]->reg_idx = i << 4;
4180                                 }
4181
4182                                 ret = true;
4183                         } else if (dcb_i == 4) {
4184                                 /*
4185                                  * Tx TC0 starts at: descriptor queue 0
4186                                  * Tx TC1 starts at: descriptor queue 64
4187                                  * Tx TC2 starts at: descriptor queue 96
4188                                  * Tx TC3 starts at: descriptor queue 112
4189                                  *
4190                                  * Rx TC0-TC3 are offset by 32 queues each
4191                                  */
4192                                 adapter->tx_ring[0]->reg_idx = 0;
4193                                 adapter->tx_ring[1]->reg_idx = 64;
4194                                 adapter->tx_ring[2]->reg_idx = 96;
4195                                 adapter->tx_ring[3]->reg_idx = 112;
4196                                 for (i = 0 ; i < dcb_i; i++)
4197                                         adapter->rx_ring[i]->reg_idx = i << 5;
4198
4199                                 ret = true;
4200                         } else {
4201                                 ret = false;
4202                         }
4203                 } else {
4204                         ret = false;
4205                 }
4206         } else {
4207                 ret = false;
4208         }
4209
4210         return ret;
4211 }
4212 #endif
4213
4214 /**
4215  * ixgbe_cache_ring_fdir - Descriptor ring to register mapping for Flow Director
4216  * @adapter: board private structure to initialize
4217  *
4218  * Cache the descriptor ring offsets for Flow Director to the assigned rings.
4219  *
4220  **/
4221 static bool inline ixgbe_cache_ring_fdir(struct ixgbe_adapter *adapter)
4222 {
4223         int i;
4224         bool ret = false;
4225
4226         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED &&
4227             ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4228              (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))) {
4229                 for (i = 0; i < adapter->num_rx_queues; i++)
4230                         adapter->rx_ring[i]->reg_idx = i;
4231                 for (i = 0; i < adapter->num_tx_queues; i++)
4232                         adapter->tx_ring[i]->reg_idx = i;
4233                 ret = true;
4234         }
4235
4236         return ret;
4237 }
4238
4239 #ifdef IXGBE_FCOE
4240 /**
4241  * ixgbe_cache_ring_fcoe - Descriptor ring to register mapping for the FCoE
4242  * @adapter: board private structure to initialize
4243  *
4244  * Cache the descriptor ring offsets for FCoE mode to the assigned rings.
4245  *
4246  */
4247 static inline bool ixgbe_cache_ring_fcoe(struct ixgbe_adapter *adapter)
4248 {
4249         int i, fcoe_rx_i = 0, fcoe_tx_i = 0;
4250         bool ret = false;
4251         struct ixgbe_ring_feature *f = &adapter->ring_feature[RING_F_FCOE];
4252
4253         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
4254 #ifdef CONFIG_IXGBE_DCB
4255                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
4256                         struct ixgbe_fcoe *fcoe = &adapter->fcoe;
4257
4258                         ixgbe_cache_ring_dcb(adapter);
4259                         /* find out queues in TC for FCoE */
4260                         fcoe_rx_i = adapter->rx_ring[fcoe->tc]->reg_idx + 1;
4261                         fcoe_tx_i = adapter->tx_ring[fcoe->tc]->reg_idx + 1;
4262                         /*
4263                          * In 82599, the number of Tx queues for each traffic
4264                          * class for both 8-TC and 4-TC modes are:
4265                          * TCs  : TC0 TC1 TC2 TC3 TC4 TC5 TC6 TC7
4266                          * 8 TCs:  32  32  16  16   8   8   8   8
4267                          * 4 TCs:  64  64  32  32
4268                          * We have max 8 queues for FCoE, where 8 the is
4269                          * FCoE redirection table size. If TC for FCoE is
4270                          * less than or equal to TC3, we have enough queues
4271                          * to add max of 8 queues for FCoE, so we start FCoE
4272                          * tx descriptor from the next one, i.e., reg_idx + 1.
4273                          * If TC for FCoE is above TC3, implying 8 TC mode,
4274                          * and we need 8 for FCoE, we have to take all queues
4275                          * in that traffic class for FCoE.
4276                          */
4277                         if ((f->indices == IXGBE_FCRETA_SIZE) && (fcoe->tc > 3))
4278                                 fcoe_tx_i--;
4279                 }
4280 #endif /* CONFIG_IXGBE_DCB */
4281                 if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
4282                         if ((adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) ||
4283                             (adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE))
4284                                 ixgbe_cache_ring_fdir(adapter);
4285                         else
4286                                 ixgbe_cache_ring_rss(adapter);
4287
4288                         fcoe_rx_i = f->mask;
4289                         fcoe_tx_i = f->mask;
4290                 }
4291                 for (i = 0; i < f->indices; i++, fcoe_rx_i++, fcoe_tx_i++) {
4292                         adapter->rx_ring[f->mask + i]->reg_idx = fcoe_rx_i;
4293                         adapter->tx_ring[f->mask + i]->reg_idx = fcoe_tx_i;
4294                 }
4295                 ret = true;
4296         }
4297         return ret;
4298 }
4299
4300 #endif /* IXGBE_FCOE */
4301 /**
4302  * ixgbe_cache_ring_sriov - Descriptor ring to register mapping for sriov
4303  * @adapter: board private structure to initialize
4304  *
4305  * SR-IOV doesn't use any descriptor rings but changes the default if
4306  * no other mapping is used.
4307  *
4308  */
4309 static inline bool ixgbe_cache_ring_sriov(struct ixgbe_adapter *adapter)
4310 {
4311         adapter->rx_ring[0]->reg_idx = adapter->num_vfs * 2;
4312         adapter->tx_ring[0]->reg_idx = adapter->num_vfs * 2;
4313         if (adapter->num_vfs)
4314                 return true;
4315         else
4316                 return false;
4317 }
4318
4319 /**
4320  * ixgbe_cache_ring_register - Descriptor ring to register mapping
4321  * @adapter: board private structure to initialize
4322  *
4323  * Once we know the feature-set enabled for the device, we'll cache
4324  * the register offset the descriptor ring is assigned to.
4325  *
4326  * Note, the order the various feature calls is important.  It must start with
4327  * the "most" features enabled at the same time, then trickle down to the
4328  * least amount of features turned on at once.
4329  **/
4330 static void ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
4331 {
4332         /* start with default case */
4333         adapter->rx_ring[0]->reg_idx = 0;
4334         adapter->tx_ring[0]->reg_idx = 0;
4335
4336         if (ixgbe_cache_ring_sriov(adapter))
4337                 return;
4338
4339 #ifdef IXGBE_FCOE
4340         if (ixgbe_cache_ring_fcoe(adapter))
4341                 return;
4342
4343 #endif /* IXGBE_FCOE */
4344 #ifdef CONFIG_IXGBE_DCB
4345         if (ixgbe_cache_ring_dcb(adapter))
4346                 return;
4347
4348 #endif
4349         if (ixgbe_cache_ring_fdir(adapter))
4350                 return;
4351
4352         if (ixgbe_cache_ring_rss(adapter))
4353                 return;
4354 }
4355
4356 /**
4357  * ixgbe_alloc_queues - Allocate memory for all rings
4358  * @adapter: board private structure to initialize
4359  *
4360  * We allocate one ring per queue at run-time since we don't know the
4361  * number of queues at compile-time.  The polling_netdev array is
4362  * intended for Multiqueue, but should work fine with a single queue.
4363  **/
4364 static int ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
4365 {
4366         int i;
4367         int orig_node = adapter->node;
4368
4369         for (i = 0; i < adapter->num_tx_queues; i++) {
4370                 struct ixgbe_ring *ring = adapter->tx_ring[i];
4371                 if (orig_node == -1) {
4372                         int cur_node = next_online_node(adapter->node);
4373                         if (cur_node == MAX_NUMNODES)
4374                                 cur_node = first_online_node;
4375                         adapter->node = cur_node;
4376                 }
4377                 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4378                                     adapter->node);
4379                 if (!ring)
4380                         ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4381                 if (!ring)
4382                         goto err_tx_ring_allocation;
4383                 ring->count = adapter->tx_ring_count;
4384                 ring->queue_index = i;
4385                 ring->numa_node = adapter->node;
4386
4387                 adapter->tx_ring[i] = ring;
4388         }
4389
4390         /* Restore the adapter's original node */
4391         adapter->node = orig_node;
4392
4393         for (i = 0; i < adapter->num_rx_queues; i++) {
4394                 struct ixgbe_ring *ring = adapter->rx_ring[i];
4395                 if (orig_node == -1) {
4396                         int cur_node = next_online_node(adapter->node);
4397                         if (cur_node == MAX_NUMNODES)
4398                                 cur_node = first_online_node;
4399                         adapter->node = cur_node;
4400                 }
4401                 ring = kzalloc_node(sizeof(struct ixgbe_ring), GFP_KERNEL,
4402                                     adapter->node);
4403                 if (!ring)
4404                         ring = kzalloc(sizeof(struct ixgbe_ring), GFP_KERNEL);
4405                 if (!ring)
4406                         goto err_rx_ring_allocation;
4407                 ring->count = adapter->rx_ring_count;
4408                 ring->queue_index = i;
4409                 ring->numa_node = adapter->node;
4410
4411                 adapter->rx_ring[i] = ring;
4412         }
4413
4414         /* Restore the adapter's original node */
4415         adapter->node = orig_node;
4416
4417         ixgbe_cache_ring_register(adapter);
4418
4419         return 0;
4420
4421 err_rx_ring_allocation:
4422         for (i = 0; i < adapter->num_tx_queues; i++)
4423                 kfree(adapter->tx_ring[i]);
4424 err_tx_ring_allocation:
4425         return -ENOMEM;
4426 }
4427
4428 /**
4429  * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
4430  * @adapter: board private structure to initialize
4431  *
4432  * Attempt to configure the interrupts using the best available
4433  * capabilities of the hardware and the kernel.
4434  **/
4435 static int ixgbe_set_interrupt_capability(struct ixgbe_adapter *adapter)
4436 {
4437         struct ixgbe_hw *hw = &adapter->hw;
4438         int err = 0;
4439         int vector, v_budget;
4440
4441         /*
4442          * It's easy to be greedy for MSI-X vectors, but it really
4443          * doesn't do us much good if we have a lot more vectors
4444          * than CPU's.  So let's be conservative and only ask for
4445          * (roughly) the same number of vectors as there are CPU's.
4446          */
4447         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
4448                        (int)num_online_cpus()) + NON_Q_VECTORS;
4449
4450         /*
4451          * At the same time, hardware can only support a maximum of
4452          * hw.mac->max_msix_vectors vectors.  With features
4453          * such as RSS and VMDq, we can easily surpass the number of Rx and Tx
4454          * descriptor queues supported by our device.  Thus, we cap it off in
4455          * those rare cases where the cpu count also exceeds our vector limit.
4456          */
4457         v_budget = min(v_budget, (int)hw->mac.max_msix_vectors);
4458
4459         /* A failure in MSI-X entry allocation isn't fatal, but it does
4460          * mean we disable MSI-X capabilities of the adapter. */
4461         adapter->msix_entries = kcalloc(v_budget,
4462                                         sizeof(struct msix_entry), GFP_KERNEL);
4463         if (adapter->msix_entries) {
4464                 for (vector = 0; vector < v_budget; vector++)
4465                         adapter->msix_entries[vector].entry = vector;
4466
4467                 ixgbe_acquire_msix_vectors(adapter, v_budget);
4468
4469                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4470                         goto out;
4471         }
4472
4473         adapter->flags &= ~IXGBE_FLAG_DCB_ENABLED;
4474         adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
4475         adapter->flags &= ~IXGBE_FLAG_FDIR_HASH_CAPABLE;
4476         adapter->flags &= ~IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4477         adapter->atr_sample_rate = 0;
4478         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
4479                 ixgbe_disable_sriov(adapter);
4480
4481         ixgbe_set_num_queues(adapter);
4482
4483         err = pci_enable_msi(adapter->pdev);
4484         if (!err) {
4485                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
4486         } else {
4487                 netif_printk(adapter, hw, KERN_DEBUG, adapter->netdev,
4488                              "Unable to allocate MSI interrupt, "
4489                              "falling back to legacy.  Error: %d\n", err);
4490                 /* reset err */
4491                 err = 0;
4492         }
4493
4494 out:
4495         return err;
4496 }
4497
4498 /**
4499  * ixgbe_alloc_q_vectors - Allocate memory for interrupt vectors
4500  * @adapter: board private structure to initialize
4501  *
4502  * We allocate one q_vector per queue interrupt.  If allocation fails we
4503  * return -ENOMEM.
4504  **/
4505 static int ixgbe_alloc_q_vectors(struct ixgbe_adapter *adapter)
4506 {
4507         int q_idx, num_q_vectors;
4508         struct ixgbe_q_vector *q_vector;
4509         int napi_vectors;
4510         int (*poll)(struct napi_struct *, int);
4511
4512         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4513                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4514                 napi_vectors = adapter->num_rx_queues;
4515                 poll = &ixgbe_clean_rxtx_many;
4516         } else {
4517                 num_q_vectors = 1;
4518                 napi_vectors = 1;
4519                 poll = &ixgbe_poll;
4520         }
4521
4522         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4523                 q_vector = kzalloc_node(sizeof(struct ixgbe_q_vector),
4524                                         GFP_KERNEL, adapter->node);
4525                 if (!q_vector)
4526                         q_vector = kzalloc(sizeof(struct ixgbe_q_vector),
4527                                            GFP_KERNEL);
4528                 if (!q_vector)
4529                         goto err_out;
4530                 q_vector->adapter = adapter;
4531                 if (q_vector->txr_count && !q_vector->rxr_count)
4532                         q_vector->eitr = adapter->tx_eitr_param;
4533                 else
4534                         q_vector->eitr = adapter->rx_eitr_param;
4535                 q_vector->v_idx = q_idx;
4536                 netif_napi_add(adapter->netdev, &q_vector->napi, (*poll), 64);
4537                 adapter->q_vector[q_idx] = q_vector;
4538         }
4539
4540         return 0;
4541
4542 err_out:
4543         while (q_idx) {
4544                 q_idx--;
4545                 q_vector = adapter->q_vector[q_idx];
4546                 netif_napi_del(&q_vector->napi);
4547                 kfree(q_vector);
4548                 adapter->q_vector[q_idx] = NULL;
4549         }
4550         return -ENOMEM;
4551 }
4552
4553 /**
4554  * ixgbe_free_q_vectors - Free memory allocated for interrupt vectors
4555  * @adapter: board private structure to initialize
4556  *
4557  * This function frees the memory allocated to the q_vectors.  In addition if
4558  * NAPI is enabled it will delete any references to the NAPI struct prior
4559  * to freeing the q_vector.
4560  **/
4561 static void ixgbe_free_q_vectors(struct ixgbe_adapter *adapter)
4562 {
4563         int q_idx, num_q_vectors;
4564
4565         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
4566                 num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
4567         else
4568                 num_q_vectors = 1;
4569
4570         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
4571                 struct ixgbe_q_vector *q_vector = adapter->q_vector[q_idx];
4572                 adapter->q_vector[q_idx] = NULL;
4573                 netif_napi_del(&q_vector->napi);
4574                 kfree(q_vector);
4575         }
4576 }
4577
4578 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
4579 {
4580         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
4581                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
4582                 pci_disable_msix(adapter->pdev);
4583                 kfree(adapter->msix_entries);
4584                 adapter->msix_entries = NULL;
4585         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
4586                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
4587                 pci_disable_msi(adapter->pdev);
4588         }
4589 }
4590
4591 /**
4592  * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
4593  * @adapter: board private structure to initialize
4594  *
4595  * We determine which interrupt scheme to use based on...
4596  * - Kernel support (MSI, MSI-X)
4597  *   - which can be user-defined (via MODULE_PARAM)
4598  * - Hardware queue count (num_*_queues)
4599  *   - defined by miscellaneous hardware support/features (RSS, etc.)
4600  **/
4601 int ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
4602 {
4603         int err;
4604
4605         /* Number of supported queues */
4606         ixgbe_set_num_queues(adapter);
4607
4608         err = ixgbe_set_interrupt_capability(adapter);
4609         if (err) {
4610                 e_dev_err("Unable to setup interrupt capabilities\n");
4611                 goto err_set_interrupt;
4612         }
4613
4614         err = ixgbe_alloc_q_vectors(adapter);
4615         if (err) {
4616                 e_dev_err("Unable to allocate memory for queue vectors\n");
4617                 goto err_alloc_q_vectors;
4618         }
4619
4620         err = ixgbe_alloc_queues(adapter);
4621         if (err) {
4622                 e_dev_err("Unable to allocate memory for queues\n");
4623                 goto err_alloc_queues;
4624         }
4625
4626         e_dev_info("Multiqueue %s: Rx Queue count = %u, Tx Queue count = %u\n",
4627                    (adapter->num_rx_queues > 1) ? "Enabled" : "Disabled",
4628                    adapter->num_rx_queues, adapter->num_tx_queues);
4629
4630         set_bit(__IXGBE_DOWN, &adapter->state);
4631
4632         return 0;
4633
4634 err_alloc_queues:
4635         ixgbe_free_q_vectors(adapter);
4636 err_alloc_q_vectors:
4637         ixgbe_reset_interrupt_capability(adapter);
4638 err_set_interrupt:
4639         return err;
4640 }
4641
4642 /**
4643  * ixgbe_clear_interrupt_scheme - Clear the current interrupt scheme settings
4644  * @adapter: board private structure to clear interrupt scheme on
4645  *
4646  * We go through and clear interrupt specific resources and reset the structure
4647  * to pre-load conditions
4648  **/
4649 void ixgbe_clear_interrupt_scheme(struct ixgbe_adapter *adapter)
4650 {
4651         int i;
4652
4653         for (i = 0; i < adapter->num_tx_queues; i++) {
4654                 kfree(adapter->tx_ring[i]);
4655                 adapter->tx_ring[i] = NULL;
4656         }
4657         for (i = 0; i < adapter->num_rx_queues; i++) {
4658                 kfree(adapter->rx_ring[i]);
4659                 adapter->rx_ring[i] = NULL;
4660         }
4661
4662         ixgbe_free_q_vectors(adapter);
4663         ixgbe_reset_interrupt_capability(adapter);
4664 }
4665
4666 /**
4667  * ixgbe_sfp_timer - worker thread to find a missing module
4668  * @data: pointer to our adapter struct
4669  **/
4670 static void ixgbe_sfp_timer(unsigned long data)
4671 {
4672         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
4673
4674         /*
4675          * Do the sfp_timer outside of interrupt context due to the
4676          * delays that sfp+ detection requires
4677          */
4678         schedule_work(&adapter->sfp_task);
4679 }
4680
4681 /**
4682  * ixgbe_sfp_task - worker thread to find a missing module
4683  * @work: pointer to work_struct containing our data
4684  **/
4685 static void ixgbe_sfp_task(struct work_struct *work)
4686 {
4687         struct ixgbe_adapter *adapter = container_of(work,
4688                                                      struct ixgbe_adapter,
4689                                                      sfp_task);
4690         struct ixgbe_hw *hw = &adapter->hw;
4691
4692         if ((hw->phy.type == ixgbe_phy_nl) &&
4693             (hw->phy.sfp_type == ixgbe_sfp_type_not_present)) {
4694                 s32 ret = hw->phy.ops.identify_sfp(hw);
4695                 if (ret == IXGBE_ERR_SFP_NOT_PRESENT)
4696                         goto reschedule;
4697                 ret = hw->phy.ops.reset(hw);
4698                 if (ret == IXGBE_ERR_SFP_NOT_SUPPORTED) {
4699                         e_dev_err("failed to initialize because an unsupported "
4700                                   "SFP+ module type was detected.\n");
4701                         e_dev_err("Reload the driver after installing a "
4702                                   "supported module.\n");
4703                         unregister_netdev(adapter->netdev);
4704                 } else {
4705                         e_info(probe, "detected SFP+: %d\n", hw->phy.sfp_type);
4706                 }
4707                 /* don't need this routine any more */
4708                 clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
4709         }
4710         return;
4711 reschedule:
4712         if (test_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state))
4713                 mod_timer(&adapter->sfp_timer,
4714                           round_jiffies(jiffies + (2 * HZ)));
4715 }
4716
4717 /**
4718  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
4719  * @adapter: board private structure to initialize
4720  *
4721  * ixgbe_sw_init initializes the Adapter private data structure.
4722  * Fields are initialized based on PCI device information and
4723  * OS network device settings (MTU size).
4724  **/
4725 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
4726 {
4727         struct ixgbe_hw *hw = &adapter->hw;
4728         struct pci_dev *pdev = adapter->pdev;
4729         struct net_device *dev = adapter->netdev;
4730         unsigned int rss;
4731 #ifdef CONFIG_IXGBE_DCB
4732         int j;
4733         struct tc_configuration *tc;
4734 #endif
4735
4736         /* PCI config space info */
4737
4738         hw->vendor_id = pdev->vendor;
4739         hw->device_id = pdev->device;
4740         hw->revision_id = pdev->revision;
4741         hw->subsystem_vendor_id = pdev->subsystem_vendor;
4742         hw->subsystem_device_id = pdev->subsystem_device;
4743
4744         /* Set capability flags */
4745         rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
4746         adapter->ring_feature[RING_F_RSS].indices = rss;
4747         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
4748         adapter->ring_feature[RING_F_DCB].indices = IXGBE_MAX_DCB_INDICES;
4749         if (hw->mac.type == ixgbe_mac_82598EB) {
4750                 if (hw->device_id == IXGBE_DEV_ID_82598AT)
4751                         adapter->flags |= IXGBE_FLAG_FAN_FAIL_CAPABLE;
4752                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82598;
4753         } else if (hw->mac.type == ixgbe_mac_82599EB) {
4754                 adapter->max_msix_q_vectors = MAX_MSIX_Q_VECTORS_82599;
4755                 adapter->flags2 |= IXGBE_FLAG2_RSC_CAPABLE;
4756                 adapter->flags2 |= IXGBE_FLAG2_RSC_ENABLED;
4757                 if (hw->device_id == IXGBE_DEV_ID_82599_T3_LOM)
4758                         adapter->flags2 |= IXGBE_FLAG2_TEMP_SENSOR_CAPABLE;
4759                 if (dev->features & NETIF_F_NTUPLE) {
4760                         /* Flow Director perfect filter enabled */
4761                         adapter->flags |= IXGBE_FLAG_FDIR_PERFECT_CAPABLE;
4762                         adapter->atr_sample_rate = 0;
4763                         spin_lock_init(&adapter->fdir_perfect_lock);
4764                 } else {
4765                         /* Flow Director hash filters enabled */
4766                         adapter->flags |= IXGBE_FLAG_FDIR_HASH_CAPABLE;
4767                         adapter->atr_sample_rate = 20;
4768                 }
4769                 adapter->ring_feature[RING_F_FDIR].indices =
4770                                                          IXGBE_MAX_FDIR_INDICES;
4771                 adapter->fdir_pballoc = 0;
4772 #ifdef IXGBE_FCOE
4773                 adapter->flags |= IXGBE_FLAG_FCOE_CAPABLE;
4774                 adapter->flags &= ~IXGBE_FLAG_FCOE_ENABLED;
4775                 adapter->ring_feature[RING_F_FCOE].indices = 0;
4776 #ifdef CONFIG_IXGBE_DCB
4777                 /* Default traffic class to use for FCoE */
4778                 adapter->fcoe.tc = IXGBE_FCOE_DEFTC;
4779                 adapter->fcoe.up = IXGBE_FCOE_DEFTC;
4780 #endif
4781 #endif /* IXGBE_FCOE */
4782         }
4783
4784 #ifdef CONFIG_IXGBE_DCB
4785         /* Configure DCB traffic classes */
4786         for (j = 0; j < MAX_TRAFFIC_CLASS; j++) {
4787                 tc = &adapter->dcb_cfg.tc_config[j];
4788                 tc->path[DCB_TX_CONFIG].bwg_id = 0;
4789                 tc->path[DCB_TX_CONFIG].bwg_percent = 12 + (j & 1);
4790                 tc->path[DCB_RX_CONFIG].bwg_id = 0;
4791                 tc->path[DCB_RX_CONFIG].bwg_percent = 12 + (j & 1);
4792                 tc->dcb_pfc = pfc_disabled;
4793         }
4794         adapter->dcb_cfg.bw_percentage[DCB_TX_CONFIG][0] = 100;
4795         adapter->dcb_cfg.bw_percentage[DCB_RX_CONFIG][0] = 100;
4796         adapter->dcb_cfg.rx_pba_cfg = pba_equal;
4797         adapter->dcb_cfg.pfc_mode_enable = false;
4798         adapter->dcb_cfg.round_robin_enable = false;
4799         adapter->dcb_set_bitmap = 0x00;
4800         ixgbe_copy_dcb_cfg(&adapter->dcb_cfg, &adapter->temp_dcb_cfg,
4801                            adapter->ring_feature[RING_F_DCB].indices);
4802
4803 #endif
4804
4805         /* default flow control settings */
4806         hw->fc.requested_mode = ixgbe_fc_full;
4807         hw->fc.current_mode = ixgbe_fc_full;    /* init for ethtool output */
4808 #ifdef CONFIG_DCB
4809         adapter->last_lfc_mode = hw->fc.current_mode;
4810 #endif
4811         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
4812         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
4813         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
4814         hw->fc.send_xon = true;
4815         hw->fc.disable_fc_autoneg = false;
4816
4817         /* enable itr by default in dynamic mode */
4818         adapter->rx_itr_setting = 1;
4819         adapter->rx_eitr_param = 20000;
4820         adapter->tx_itr_setting = 1;
4821         adapter->tx_eitr_param = 10000;
4822
4823         /* set defaults for eitr in MegaBytes */
4824         adapter->eitr_low = 10;
4825         adapter->eitr_high = 20;
4826
4827         /* set default ring sizes */
4828         adapter->tx_ring_count = IXGBE_DEFAULT_TXD;
4829         adapter->rx_ring_count = IXGBE_DEFAULT_RXD;
4830
4831         /* initialize eeprom parameters */
4832         if (ixgbe_init_eeprom_params_generic(hw)) {
4833                 e_dev_err("EEPROM initialization failed\n");
4834                 return -EIO;
4835         }
4836
4837         /* enable rx csum by default */
4838         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
4839
4840         /* get assigned NUMA node */
4841         adapter->node = dev_to_node(&pdev->dev);
4842
4843         set_bit(__IXGBE_DOWN, &adapter->state);
4844
4845         return 0;
4846 }
4847
4848 /**
4849  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
4850  * @adapter: board private structure
4851  * @tx_ring:    tx descriptor ring (for a specific queue) to setup
4852  *
4853  * Return 0 on success, negative on failure
4854  **/
4855 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
4856                              struct ixgbe_ring *tx_ring)
4857 {
4858         struct pci_dev *pdev = adapter->pdev;
4859         int size;
4860
4861         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
4862         tx_ring->tx_buffer_info = vmalloc_node(size, tx_ring->numa_node);
4863         if (!tx_ring->tx_buffer_info)
4864                 tx_ring->tx_buffer_info = vmalloc(size);
4865         if (!tx_ring->tx_buffer_info)
4866                 goto err;
4867         memset(tx_ring->tx_buffer_info, 0, size);
4868
4869         /* round up to nearest 4K */
4870         tx_ring->size = tx_ring->count * sizeof(union ixgbe_adv_tx_desc);
4871         tx_ring->size = ALIGN(tx_ring->size, 4096);
4872
4873         tx_ring->desc = dma_alloc_coherent(&pdev->dev, tx_ring->size,
4874                                            &tx_ring->dma, GFP_KERNEL);
4875         if (!tx_ring->desc)
4876                 goto err;
4877
4878         tx_ring->next_to_use = 0;
4879         tx_ring->next_to_clean = 0;
4880         tx_ring->work_limit = tx_ring->count;
4881         return 0;
4882
4883 err:
4884         vfree(tx_ring->tx_buffer_info);
4885         tx_ring->tx_buffer_info = NULL;
4886         e_err(probe, "Unable to allocate memory for the Tx descriptor ring\n");
4887         return -ENOMEM;
4888 }
4889
4890 /**
4891  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
4892  * @adapter: board private structure
4893  *
4894  * If this function returns with an error, then it's possible one or
4895  * more of the rings is populated (while the rest are not).  It is the
4896  * callers duty to clean those orphaned rings.
4897  *
4898  * Return 0 on success, negative on failure
4899  **/
4900 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
4901 {
4902         int i, err = 0;
4903
4904         for (i = 0; i < adapter->num_tx_queues; i++) {
4905                 err = ixgbe_setup_tx_resources(adapter, adapter->tx_ring[i]);
4906                 if (!err)
4907                         continue;
4908                 e_err(probe, "Allocation for Tx Queue %u failed\n", i);
4909                 break;
4910         }
4911
4912         return err;
4913 }
4914
4915 /**
4916  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
4917  * @adapter: board private structure
4918  * @rx_ring:    rx descriptor ring (for a specific queue) to setup
4919  *
4920  * Returns 0 on success, negative on failure
4921  **/
4922 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
4923                              struct ixgbe_ring *rx_ring)
4924 {
4925         struct pci_dev *pdev = adapter->pdev;
4926         int size;
4927
4928         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
4929         rx_ring->rx_buffer_info = vmalloc_node(size, adapter->node);
4930         if (!rx_ring->rx_buffer_info)
4931                 rx_ring->rx_buffer_info = vmalloc(size);
4932         if (!rx_ring->rx_buffer_info) {
4933                 e_err(probe, "vmalloc allocation failed for the Rx "
4934                       "descriptor ring\n");
4935                 goto alloc_failed;
4936         }
4937         memset(rx_ring->rx_buffer_info, 0, size);
4938
4939         /* Round up to nearest 4K */
4940         rx_ring->size = rx_ring->count * sizeof(union ixgbe_adv_rx_desc);
4941         rx_ring->size = ALIGN(rx_ring->size, 4096);
4942
4943         rx_ring->desc = dma_alloc_coherent(&pdev->dev, rx_ring->size,
4944                                            &rx_ring->dma, GFP_KERNEL);
4945
4946         if (!rx_ring->desc) {
4947                 e_err(probe, "Memory allocation failed for the Rx "
4948                       "descriptor ring\n");
4949                 vfree(rx_ring->rx_buffer_info);
4950                 goto alloc_failed;
4951         }
4952
4953         rx_ring->next_to_clean = 0;
4954         rx_ring->next_to_use = 0;
4955
4956         return 0;
4957
4958 alloc_failed:
4959         return -ENOMEM;
4960 }
4961
4962 /**
4963  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
4964  * @adapter: board private structure
4965  *
4966  * If this function returns with an error, then it's possible one or
4967  * more of the rings is populated (while the rest are not).  It is the
4968  * callers duty to clean those orphaned rings.
4969  *
4970  * Return 0 on success, negative on failure
4971  **/
4972
4973 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
4974 {
4975         int i, err = 0;
4976
4977         for (i = 0; i < adapter->num_rx_queues; i++) {
4978                 err = ixgbe_setup_rx_resources(adapter, adapter->rx_ring[i]);
4979                 if (!err)
4980                         continue;
4981                 e_err(probe, "Allocation for Rx Queue %u failed\n", i);
4982                 break;
4983         }
4984
4985         return err;
4986 }
4987
4988 /**
4989  * ixgbe_free_tx_resources - Free Tx Resources per Queue
4990  * @adapter: board private structure
4991  * @tx_ring: Tx descriptor ring for a specific queue
4992  *
4993  * Free all transmit software resources
4994  **/
4995 void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
4996                              struct ixgbe_ring *tx_ring)
4997 {
4998         struct pci_dev *pdev = adapter->pdev;
4999
5000         ixgbe_clean_tx_ring(adapter, tx_ring);
5001
5002         vfree(tx_ring->tx_buffer_info);
5003         tx_ring->tx_buffer_info = NULL;
5004
5005         dma_free_coherent(&pdev->dev, tx_ring->size, tx_ring->desc,
5006                           tx_ring->dma);
5007
5008         tx_ring->desc = NULL;
5009 }
5010
5011 /**
5012  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
5013  * @adapter: board private structure
5014  *
5015  * Free all transmit software resources
5016  **/
5017 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
5018 {
5019         int i;
5020
5021         for (i = 0; i < adapter->num_tx_queues; i++)
5022                 if (adapter->tx_ring[i]->desc)
5023                         ixgbe_free_tx_resources(adapter, adapter->tx_ring[i]);
5024 }
5025
5026 /**
5027  * ixgbe_free_rx_resources - Free Rx Resources
5028  * @adapter: board private structure
5029  * @rx_ring: ring to clean the resources from
5030  *
5031  * Free all receive software resources
5032  **/
5033 void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
5034                              struct ixgbe_ring *rx_ring)
5035 {
5036         struct pci_dev *pdev = adapter->pdev;
5037
5038         ixgbe_clean_rx_ring(adapter, rx_ring);
5039
5040         vfree(rx_ring->rx_buffer_info);
5041         rx_ring->rx_buffer_info = NULL;
5042
5043         dma_free_coherent(&pdev->dev, rx_ring->size, rx_ring->desc,
5044                           rx_ring->dma);
5045
5046         rx_ring->desc = NULL;
5047 }
5048
5049 /**
5050  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
5051  * @adapter: board private structure
5052  *
5053  * Free all receive software resources
5054  **/
5055 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
5056 {
5057         int i;
5058
5059         for (i = 0; i < adapter->num_rx_queues; i++)
5060                 if (adapter->rx_ring[i]->desc)
5061                         ixgbe_free_rx_resources(adapter, adapter->rx_ring[i]);
5062 }
5063
5064 /**
5065  * ixgbe_change_mtu - Change the Maximum Transfer Unit
5066  * @netdev: network interface device structure
5067  * @new_mtu: new value for maximum frame size
5068  *
5069  * Returns 0 on success, negative on failure
5070  **/
5071 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
5072 {
5073         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5074         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
5075
5076         /* MTU < 68 is an error and causes problems on some kernels */
5077         if ((new_mtu < 68) || (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
5078                 return -EINVAL;
5079
5080         e_info(probe, "changing MTU from %d to %d\n", netdev->mtu, new_mtu);
5081         /* must set new MTU before calling down or up */
5082         netdev->mtu = new_mtu;
5083
5084         if (netif_running(netdev))
5085                 ixgbe_reinit_locked(adapter);
5086
5087         return 0;
5088 }
5089
5090 /**
5091  * ixgbe_open - Called when a network interface is made active
5092  * @netdev: network interface device structure
5093  *
5094  * Returns 0 on success, negative value on failure
5095  *
5096  * The open entry point is called when a network interface is made
5097  * active by the system (IFF_UP).  At this point all resources needed
5098  * for transmit and receive operations are allocated, the interrupt
5099  * handler is registered with the OS, the watchdog timer is started,
5100  * and the stack is notified that the interface is ready.
5101  **/
5102 static int ixgbe_open(struct net_device *netdev)
5103 {
5104         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5105         int err;
5106
5107         /* disallow open during test */
5108         if (test_bit(__IXGBE_TESTING, &adapter->state))
5109                 return -EBUSY;
5110
5111         netif_carrier_off(netdev);
5112
5113         /* allocate transmit descriptors */
5114         err = ixgbe_setup_all_tx_resources(adapter);
5115         if (err)
5116                 goto err_setup_tx;
5117
5118         /* allocate receive descriptors */
5119         err = ixgbe_setup_all_rx_resources(adapter);
5120         if (err)
5121                 goto err_setup_rx;
5122
5123         ixgbe_configure(adapter);
5124
5125         err = ixgbe_request_irq(adapter);
5126         if (err)
5127                 goto err_req_irq;
5128
5129         err = ixgbe_up_complete(adapter);
5130         if (err)
5131                 goto err_up;
5132
5133         netif_tx_start_all_queues(netdev);
5134
5135         return 0;
5136
5137 err_up:
5138         ixgbe_release_hw_control(adapter);
5139         ixgbe_free_irq(adapter);
5140 err_req_irq:
5141 err_setup_rx:
5142         ixgbe_free_all_rx_resources(adapter);
5143 err_setup_tx:
5144         ixgbe_free_all_tx_resources(adapter);
5145         ixgbe_reset(adapter);
5146
5147         return err;
5148 }
5149
5150 /**
5151  * ixgbe_close - Disables a network interface
5152  * @netdev: network interface device structure
5153  *
5154  * Returns 0, this is not allowed to fail
5155  *
5156  * The close entry point is called when an interface is de-activated
5157  * by the OS.  The hardware is still under the drivers control, but
5158  * needs to be disabled.  A global MAC reset is issued to stop the
5159  * hardware, and all transmit and receive resources are freed.
5160  **/
5161 static int ixgbe_close(struct net_device *netdev)
5162 {
5163         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5164
5165         ixgbe_down(adapter);
5166         ixgbe_free_irq(adapter);
5167
5168         ixgbe_free_all_tx_resources(adapter);
5169         ixgbe_free_all_rx_resources(adapter);
5170
5171         ixgbe_release_hw_control(adapter);
5172
5173         return 0;
5174 }
5175
5176 #ifdef CONFIG_PM
5177 static int ixgbe_resume(struct pci_dev *pdev)
5178 {
5179         struct net_device *netdev = pci_get_drvdata(pdev);
5180         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5181         u32 err;
5182
5183         pci_set_power_state(pdev, PCI_D0);
5184         pci_restore_state(pdev);
5185         /*
5186          * pci_restore_state clears dev->state_saved so call
5187          * pci_save_state to restore it.
5188          */
5189         pci_save_state(pdev);
5190
5191         err = pci_enable_device_mem(pdev);
5192         if (err) {
5193                 e_dev_err("Cannot enable PCI device from suspend\n");
5194                 return err;
5195         }
5196         pci_set_master(pdev);
5197
5198         pci_wake_from_d3(pdev, false);
5199
5200         err = ixgbe_init_interrupt_scheme(adapter);
5201         if (err) {
5202                 e_dev_err("Cannot initialize interrupts for device\n");
5203                 return err;
5204         }
5205
5206         ixgbe_reset(adapter);
5207
5208         IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
5209
5210         if (netif_running(netdev)) {
5211                 err = ixgbe_open(adapter->netdev);
5212                 if (err)
5213                         return err;
5214         }
5215
5216         netif_device_attach(netdev);
5217
5218         return 0;
5219 }
5220 #endif /* CONFIG_PM */
5221
5222 static int __ixgbe_shutdown(struct pci_dev *pdev, bool *enable_wake)
5223 {
5224         struct net_device *netdev = pci_get_drvdata(pdev);
5225         struct ixgbe_adapter *adapter = netdev_priv(netdev);
5226         struct ixgbe_hw *hw = &adapter->hw;
5227         u32 ctrl, fctrl;
5228         u32 wufc = adapter->wol;
5229 #ifdef CONFIG_PM
5230         int retval = 0;
5231 #endif
5232
5233         netif_device_detach(netdev);
5234
5235         if (netif_running(netdev)) {
5236                 ixgbe_down(adapter);
5237                 ixgbe_free_irq(adapter);
5238                 ixgbe_free_all_tx_resources(adapter);
5239                 ixgbe_free_all_rx_resources(adapter);
5240         }
5241
5242 #ifdef CONFIG_PM
5243         retval = pci_save_state(pdev);
5244         if (retval)
5245                 return retval;
5246
5247 #endif
5248         if (wufc) {
5249                 ixgbe_set_rx_mode(netdev);
5250
5251                 /* turn on all-multi mode if wake on multicast is enabled */
5252                 if (wufc & IXGBE_WUFC_MC) {
5253                         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5254                         fctrl |= IXGBE_FCTRL_MPE;
5255                         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
5256                 }
5257
5258                 ctrl = IXGBE_READ_REG(hw, IXGBE_CTRL);
5259                 ctrl |= IXGBE_CTRL_GIO_DIS;
5260                 IXGBE_WRITE_REG(hw, IXGBE_CTRL, ctrl);
5261
5262                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, wufc);
5263         } else {
5264                 IXGBE_WRITE_REG(hw, IXGBE_WUC, 0);
5265                 IXGBE_WRITE_REG(hw, IXGBE_WUFC, 0);
5266         }
5267
5268         if (wufc && hw->mac.type == ixgbe_mac_82599EB)
5269                 pci_wake_from_d3(pdev, true);
5270         else
5271                 pci_wake_from_d3(pdev, false);
5272
5273         *enable_wake = !!wufc;
5274
5275         ixgbe_clear_interrupt_scheme(adapter);
5276
5277         ixgbe_release_hw_control(adapter);
5278
5279         pci_disable_device(pdev);
5280
5281         return 0;
5282 }
5283
5284 #ifdef CONFIG_PM
5285 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
5286 {
5287         int retval;
5288         bool wake;
5289
5290         retval = __ixgbe_shutdown(pdev, &wake);
5291         if (retval)
5292                 return retval;
5293
5294         if (wake) {
5295                 pci_prepare_to_sleep(pdev);
5296         } else {
5297                 pci_wake_from_d3(pdev, false);
5298                 pci_set_power_state(pdev, PCI_D3hot);
5299         }
5300
5301         return 0;
5302 }
5303 #endif /* CONFIG_PM */
5304
5305 static void ixgbe_shutdown(struct pci_dev *pdev)
5306 {
5307         bool wake;
5308
5309         __ixgbe_shutdown(pdev, &wake);
5310
5311         if (system_state == SYSTEM_POWER_OFF) {
5312                 pci_wake_from_d3(pdev, wake);
5313                 pci_set_power_state(pdev, PCI_D3hot);
5314         }
5315 }
5316
5317 /**
5318  * ixgbe_update_stats - Update the board statistics counters.
5319  * @adapter: board private structure
5320  **/
5321 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
5322 {
5323         struct net_device *netdev = adapter->netdev;
5324         struct ixgbe_hw *hw = &adapter->hw;
5325         u64 total_mpc = 0;
5326         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
5327         u64 non_eop_descs = 0, restart_queue = 0;
5328
5329         if (test_bit(__IXGBE_DOWN, &adapter->state) ||
5330             test_bit(__IXGBE_RESETTING, &adapter->state))
5331                 return;
5332
5333         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED) {
5334                 u64 rsc_count = 0;
5335                 u64 rsc_flush = 0;
5336                 for (i = 0; i < 16; i++)
5337                         adapter->hw_rx_no_dma_resources +=
5338                                              IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5339                 for (i = 0; i < adapter->num_rx_queues; i++) {
5340                         rsc_count += adapter->rx_ring[i]->rsc_count;
5341                         rsc_flush += adapter->rx_ring[i]->rsc_flush;
5342                 }
5343                 adapter->rsc_total_count = rsc_count;
5344                 adapter->rsc_total_flush = rsc_flush;
5345         }
5346
5347         /* gather some stats to the adapter struct that are per queue */
5348         for (i = 0; i < adapter->num_tx_queues; i++)
5349                 restart_queue += adapter->tx_ring[i]->restart_queue;
5350         adapter->restart_queue = restart_queue;
5351
5352         for (i = 0; i < adapter->num_rx_queues; i++)
5353                 non_eop_descs += adapter->rx_ring[i]->non_eop_descs;
5354         adapter->non_eop_descs = non_eop_descs;
5355
5356         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
5357         for (i = 0; i < 8; i++) {
5358                 /* for packet buffers not used, the register should read 0 */
5359                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
5360                 missed_rx += mpc;
5361                 adapter->stats.mpc[i] += mpc;
5362                 total_mpc += adapter->stats.mpc[i];
5363                 if (hw->mac.type == ixgbe_mac_82598EB)
5364                         adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
5365                 adapter->stats.qptc[i] += IXGBE_READ_REG(hw, IXGBE_QPTC(i));
5366                 adapter->stats.qbtc[i] += IXGBE_READ_REG(hw, IXGBE_QBTC(i));
5367                 adapter->stats.qprc[i] += IXGBE_READ_REG(hw, IXGBE_QPRC(i));
5368                 adapter->stats.qbrc[i] += IXGBE_READ_REG(hw, IXGBE_QBRC(i));
5369                 if (hw->mac.type == ixgbe_mac_82599EB) {
5370                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5371                                                             IXGBE_PXONRXCNT(i));
5372                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5373                                                            IXGBE_PXOFFRXCNT(i));
5374                         adapter->stats.qprdc[i] += IXGBE_READ_REG(hw, IXGBE_QPRDC(i));
5375                 } else {
5376                         adapter->stats.pxonrxc[i] += IXGBE_READ_REG(hw,
5377                                                               IXGBE_PXONRXC(i));
5378                         adapter->stats.pxoffrxc[i] += IXGBE_READ_REG(hw,
5379                                                              IXGBE_PXOFFRXC(i));
5380                 }
5381                 adapter->stats.pxontxc[i] += IXGBE_READ_REG(hw,
5382                                                             IXGBE_PXONTXC(i));
5383                 adapter->stats.pxofftxc[i] += IXGBE_READ_REG(hw,
5384                                                              IXGBE_PXOFFTXC(i));
5385         }
5386         adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
5387         /* work around hardware counting issue */
5388         adapter->stats.gprc -= missed_rx;
5389
5390         /* 82598 hardware only has a 32 bit counter in the high register */
5391         if (hw->mac.type == ixgbe_mac_82599EB) {
5392                 u64 tmp;
5393                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCL);
5394                 tmp = IXGBE_READ_REG(hw, IXGBE_GORCH) & 0xF; /* 4 high bits of GORC */
5395                 adapter->stats.gorc += (tmp << 32);
5396                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCL);
5397                 tmp = IXGBE_READ_REG(hw, IXGBE_GOTCH) & 0xF; /* 4 high bits of GOTC */
5398                 adapter->stats.gotc += (tmp << 32);
5399                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORL);
5400                 IXGBE_READ_REG(hw, IXGBE_TORH); /* to clear */
5401                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXCNT);
5402                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXCNT);
5403                 adapter->stats.fdirmatch += IXGBE_READ_REG(hw, IXGBE_FDIRMATCH);
5404                 adapter->stats.fdirmiss += IXGBE_READ_REG(hw, IXGBE_FDIRMISS);
5405 #ifdef IXGBE_FCOE
5406                 adapter->stats.fccrc += IXGBE_READ_REG(hw, IXGBE_FCCRC);
5407                 adapter->stats.fcoerpdc += IXGBE_READ_REG(hw, IXGBE_FCOERPDC);
5408                 adapter->stats.fcoeprc += IXGBE_READ_REG(hw, IXGBE_FCOEPRC);
5409                 adapter->stats.fcoeptc += IXGBE_READ_REG(hw, IXGBE_FCOEPTC);
5410                 adapter->stats.fcoedwrc += IXGBE_READ_REG(hw, IXGBE_FCOEDWRC);
5411                 adapter->stats.fcoedwtc += IXGBE_READ_REG(hw, IXGBE_FCOEDWTC);
5412 #endif /* IXGBE_FCOE */
5413         } else {
5414                 adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
5415                 adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
5416                 adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
5417                 adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
5418                 adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
5419         }
5420         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
5421         adapter->stats.bprc += bprc;
5422         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
5423         if (hw->mac.type == ixgbe_mac_82598EB)
5424                 adapter->stats.mprc -= bprc;
5425         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
5426         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
5427         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
5428         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
5429         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
5430         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
5431         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
5432         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
5433         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
5434         adapter->stats.lxontxc += lxon;
5435         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
5436         adapter->stats.lxofftxc += lxoff;
5437         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5438         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
5439         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
5440         /*
5441          * 82598 errata - tx of flow control packets is included in tx counters
5442          */
5443         xon_off_tot = lxon + lxoff;
5444         adapter->stats.gptc -= xon_off_tot;
5445         adapter->stats.mptc -= xon_off_tot;
5446         adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
5447         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
5448         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
5449         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
5450         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
5451         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
5452         adapter->stats.ptc64 -= xon_off_tot;
5453         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
5454         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
5455         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
5456         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
5457         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
5458         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
5459
5460         /* Fill out the OS statistics structure */
5461         netdev->stats.multicast = adapter->stats.mprc;
5462
5463         /* Rx Errors */
5464         netdev->stats.rx_errors = adapter->stats.crcerrs +
5465                                        adapter->stats.rlec;
5466         netdev->stats.rx_dropped = 0;
5467         netdev->stats.rx_length_errors = adapter->stats.rlec;
5468         netdev->stats.rx_crc_errors = adapter->stats.crcerrs;
5469         netdev->stats.rx_missed_errors = total_mpc;
5470 }
5471
5472 /**
5473  * ixgbe_watchdog - Timer Call-back
5474  * @data: pointer to adapter cast into an unsigned long
5475  **/
5476 static void ixgbe_watchdog(unsigned long data)
5477 {
5478         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
5479         struct ixgbe_hw *hw = &adapter->hw;
5480         u64 eics = 0;
5481         int i;
5482
5483         /*
5484          *  Do the watchdog outside of interrupt context due to the lovely
5485          * delays that some of the newer hardware requires
5486          */
5487
5488         if (test_bit(__IXGBE_DOWN, &adapter->state))
5489                 goto watchdog_short_circuit;
5490
5491         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
5492                 /*
5493                  * for legacy and MSI interrupts don't set any bits
5494                  * that are enabled for EIAM, because this operation
5495                  * would set *both* EIMS and EICS for any bit in EIAM
5496                  */
5497                 IXGBE_WRITE_REG(hw, IXGBE_EICS,
5498                         (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
5499                 goto watchdog_reschedule;
5500         }
5501
5502         /* get one bit for every active tx/rx interrupt vector */
5503         for (i = 0; i < adapter->num_msix_vectors - NON_Q_VECTORS; i++) {
5504                 struct ixgbe_q_vector *qv = adapter->q_vector[i];
5505                 if (qv->rxr_count || qv->txr_count)
5506                         eics |= ((u64)1 << i);
5507         }
5508
5509         /* Cause software interrupt to ensure rx rings are cleaned */
5510         ixgbe_irq_rearm_queues(adapter, eics);
5511
5512 watchdog_reschedule:
5513         /* Reset the timer */
5514         mod_timer(&adapter->watchdog_timer, round_jiffies(jiffies + 2 * HZ));
5515
5516 watchdog_short_circuit:
5517         schedule_work(&adapter->watchdog_task);
5518 }
5519
5520 /**
5521  * ixgbe_multispeed_fiber_task - worker thread to configure multispeed fiber
5522  * @work: pointer to work_struct containing our data
5523  **/
5524 static void ixgbe_multispeed_fiber_task(struct work_struct *work)
5525 {
5526         struct ixgbe_adapter *adapter = container_of(work,
5527                                                      struct ixgbe_adapter,
5528                                                      multispeed_fiber_task);
5529         struct ixgbe_hw *hw = &adapter->hw;
5530         u32 autoneg;
5531         bool negotiation;
5532
5533         adapter->flags |= IXGBE_FLAG_IN_SFP_LINK_TASK;
5534         autoneg = hw->phy.autoneg_advertised;
5535         if ((!autoneg) && (hw->mac.ops.get_link_capabilities))
5536                 hw->mac.ops.get_link_capabilities(hw, &autoneg, &negotiation);
5537         hw->mac.autotry_restart = false;
5538         if (hw->mac.ops.setup_link)
5539                 hw->mac.ops.setup_link(hw, autoneg, negotiation, true);
5540         adapter->flags |= IXGBE_FLAG_NEED_LINK_UPDATE;
5541         adapter->flags &= ~IXGBE_FLAG_IN_SFP_LINK_TASK;
5542 }
5543
5544 /**
5545  * ixgbe_sfp_config_module_task - worker thread to configure a new SFP+ module
5546  * @work: pointer to work_struct containing our data
5547  **/
5548 static void ixgbe_sfp_config_module_task(struct work_struct *work)
5549 {
5550         struct ixgbe_adapter *adapter = container_of(work,
5551                                                      struct ixgbe_adapter,
5552                                                      sfp_config_module_task);
5553         struct ixgbe_hw *hw = &adapter->hw;
5554         u32 err;
5555
5556         adapter->flags |= IXGBE_FLAG_IN_SFP_MOD_TASK;
5557
5558         /* Time for electrical oscillations to settle down */
5559         msleep(100);
5560         err = hw->phy.ops.identify_sfp(hw);
5561
5562         if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
5563                 e_dev_err("failed to initialize because an unsupported SFP+ "
5564                           "module type was detected.\n");
5565                 e_dev_err("Reload the driver after installing a supported "
5566                           "module.\n");
5567                 unregister_netdev(adapter->netdev);
5568                 return;
5569         }
5570         hw->mac.ops.setup_sfp(hw);
5571
5572         if (!(adapter->flags & IXGBE_FLAG_IN_SFP_LINK_TASK))
5573                 /* This will also work for DA Twinax connections */
5574                 schedule_work(&adapter->multispeed_fiber_task);
5575         adapter->flags &= ~IXGBE_FLAG_IN_SFP_MOD_TASK;
5576 }
5577
5578 /**
5579  * ixgbe_fdir_reinit_task - worker thread to reinit FDIR filter table
5580  * @work: pointer to work_struct containing our data
5581  **/
5582 static void ixgbe_fdir_reinit_task(struct work_struct *work)
5583 {
5584         struct ixgbe_adapter *adapter = container_of(work,
5585                                                      struct ixgbe_adapter,
5586                                                      fdir_reinit_task);
5587         struct ixgbe_hw *hw = &adapter->hw;
5588         int i;
5589
5590         if (ixgbe_reinit_fdir_tables_82599(hw) == 0) {
5591                 for (i = 0; i < adapter->num_tx_queues; i++)
5592                         set_bit(__IXGBE_FDIR_INIT_DONE,
5593                                 &(adapter->tx_ring[i]->reinit_state));
5594         } else {
5595                 e_err(probe, "failed to finish FDIR re-initialization, "
5596                       "ignored adding FDIR ATR filters\n");
5597         }
5598         /* Done FDIR Re-initialization, enable transmits */
5599         netif_tx_start_all_queues(adapter->netdev);
5600 }
5601
5602 static DEFINE_MUTEX(ixgbe_watchdog_lock);
5603
5604 /**
5605  * ixgbe_watchdog_task - worker thread to bring link up
5606  * @work: pointer to work_struct containing our data
5607  **/
5608 static void ixgbe_watchdog_task(struct work_struct *work)
5609 {
5610         struct ixgbe_adapter *adapter = container_of(work,
5611                                                      struct ixgbe_adapter,
5612                                                      watchdog_task);
5613         struct net_device *netdev = adapter->netdev;
5614         struct ixgbe_hw *hw = &adapter->hw;
5615         u32 link_speed;
5616         bool link_up;
5617         int i;
5618         struct ixgbe_ring *tx_ring;
5619         int some_tx_pending = 0;
5620
5621         mutex_lock(&ixgbe_watchdog_lock);
5622
5623         link_up = adapter->link_up;
5624         link_speed = adapter->link_speed;
5625
5626         if (adapter->flags & IXGBE_FLAG_NEED_LINK_UPDATE) {
5627                 hw->mac.ops.check_link(hw, &link_speed, &link_up, false);
5628                 if (link_up) {
5629 #ifdef CONFIG_DCB
5630                         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
5631                                 for (i = 0; i < MAX_TRAFFIC_CLASS; i++)
5632                                         hw->mac.ops.fc_enable(hw, i);
5633                         } else {
5634                                 hw->mac.ops.fc_enable(hw, 0);
5635                         }
5636 #else
5637                         hw->mac.ops.fc_enable(hw, 0);
5638 #endif
5639                 }
5640
5641                 if (link_up ||
5642                     time_after(jiffies, (adapter->link_check_timeout +
5643                                          IXGBE_TRY_LINK_TIMEOUT))) {
5644                         adapter->flags &= ~IXGBE_FLAG_NEED_LINK_UPDATE;
5645                         IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMC_LSC);
5646                 }
5647                 adapter->link_up = link_up;
5648                 adapter->link_speed = link_speed;
5649         }
5650
5651         if (link_up) {
5652                 if (!netif_carrier_ok(netdev)) {
5653                         bool flow_rx, flow_tx;
5654
5655                         if (hw->mac.type == ixgbe_mac_82599EB) {
5656                                 u32 mflcn = IXGBE_READ_REG(hw, IXGBE_MFLCN);
5657                                 u32 fccfg = IXGBE_READ_REG(hw, IXGBE_FCCFG);
5658                                 flow_rx = !!(mflcn & IXGBE_MFLCN_RFCE);
5659                                 flow_tx = !!(fccfg & IXGBE_FCCFG_TFCE_802_3X);
5660                         } else {
5661                                 u32 frctl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
5662                                 u32 rmcs = IXGBE_READ_REG(hw, IXGBE_RMCS);
5663                                 flow_rx = !!(frctl & IXGBE_FCTRL_RFCE);
5664                                 flow_tx = !!(rmcs & IXGBE_RMCS_TFCE_802_3X);
5665                         }
5666
5667                         e_info(drv, "NIC Link is Up %s, Flow Control: %s\n",
5668                                (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
5669                                "10 Gbps" :
5670                                (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
5671                                "1 Gbps" : "unknown speed")),
5672                                ((flow_rx && flow_tx) ? "RX/TX" :
5673                                (flow_rx ? "RX" :
5674                                (flow_tx ? "TX" : "None"))));
5675
5676                         netif_carrier_on(netdev);
5677                 } else {
5678                         /* Force detection of hung controller */
5679                         adapter->detect_tx_hung = true;
5680                 }
5681         } else {
5682                 adapter->link_up = false;
5683                 adapter->link_speed = 0;
5684                 if (netif_carrier_ok(netdev)) {
5685                         e_info(drv, "NIC Link is Down\n");
5686                         netif_carrier_off(netdev);
5687                 }
5688         }
5689
5690         if (!netif_carrier_ok(netdev)) {
5691                 for (i = 0; i < adapter->num_tx_queues; i++) {
5692                         tx_ring = adapter->tx_ring[i];
5693                         if (tx_ring->next_to_use != tx_ring->next_to_clean) {
5694                                 some_tx_pending = 1;
5695                                 break;
5696                         }
5697                 }
5698
5699                 if (some_tx_pending) {
5700                         /* We've lost link, so the controller stops DMA,
5701                          * but we've got queued Tx work that's never going
5702                          * to get done, so reset controller to flush Tx.
5703                          * (Do the reset outside of interrupt context).
5704                          */
5705                          schedule_work(&adapter->reset_task);
5706                 }
5707         }
5708
5709         ixgbe_update_stats(adapter);
5710         mutex_unlock(&ixgbe_watchdog_lock);
5711 }
5712
5713 static int ixgbe_tso(struct ixgbe_adapter *adapter,
5714                      struct ixgbe_ring *tx_ring, struct sk_buff *skb,
5715                      u32 tx_flags, u8 *hdr_len)
5716 {
5717         struct ixgbe_adv_tx_context_desc *context_desc;
5718         unsigned int i;
5719         int err;
5720         struct ixgbe_tx_buffer *tx_buffer_info;
5721         u32 vlan_macip_lens = 0, type_tucmd_mlhl;
5722         u32 mss_l4len_idx, l4len;
5723
5724         if (skb_is_gso(skb)) {
5725                 if (skb_header_cloned(skb)) {
5726                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
5727                         if (err)
5728                                 return err;
5729                 }
5730                 l4len = tcp_hdrlen(skb);
5731                 *hdr_len += l4len;
5732
5733                 if (skb->protocol == htons(ETH_P_IP)) {
5734                         struct iphdr *iph = ip_hdr(skb);
5735                         iph->tot_len = 0;
5736                         iph->check = 0;
5737                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
5738                                                                  iph->daddr, 0,
5739                                                                  IPPROTO_TCP,
5740                                                                  0);
5741                 } else if (skb_is_gso_v6(skb)) {
5742                         ipv6_hdr(skb)->payload_len = 0;
5743                         tcp_hdr(skb)->check =
5744                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
5745                                              &ipv6_hdr(skb)->daddr,
5746                                              0, IPPROTO_TCP, 0);
5747                 }
5748
5749                 i = tx_ring->next_to_use;
5750
5751                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5752                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5753
5754                 /* VLAN MACLEN IPLEN */
5755                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5756                         vlan_macip_lens |=
5757                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5758                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
5759                                     IXGBE_ADVTXD_MACLEN_SHIFT);
5760                 *hdr_len += skb_network_offset(skb);
5761                 vlan_macip_lens |=
5762                     (skb_transport_header(skb) - skb_network_header(skb));
5763                 *hdr_len +=
5764                     (skb_transport_header(skb) - skb_network_header(skb));
5765                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5766                 context_desc->seqnum_seed = 0;
5767
5768                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
5769                 type_tucmd_mlhl = (IXGBE_TXD_CMD_DEXT |
5770                                    IXGBE_ADVTXD_DTYP_CTXT);
5771
5772                 if (skb->protocol == htons(ETH_P_IP))
5773                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5774                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
5775                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5776
5777                 /* MSS L4LEN IDX */
5778                 mss_l4len_idx =
5779                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
5780                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
5781                 /* use index 1 for TSO */
5782                 mss_l4len_idx |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
5783                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
5784
5785                 tx_buffer_info->time_stamp = jiffies;
5786                 tx_buffer_info->next_to_watch = i;
5787
5788                 i++;
5789                 if (i == tx_ring->count)
5790                         i = 0;
5791                 tx_ring->next_to_use = i;
5792
5793                 return true;
5794         }
5795         return false;
5796 }
5797
5798 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
5799                           struct ixgbe_ring *tx_ring,
5800                           struct sk_buff *skb, u32 tx_flags)
5801 {
5802         struct ixgbe_adv_tx_context_desc *context_desc;
5803         unsigned int i;
5804         struct ixgbe_tx_buffer *tx_buffer_info;
5805         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
5806
5807         if (skb->ip_summed == CHECKSUM_PARTIAL ||
5808             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
5809                 i = tx_ring->next_to_use;
5810                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5811                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
5812
5813                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
5814                         vlan_macip_lens |=
5815                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
5816                 vlan_macip_lens |= (skb_network_offset(skb) <<
5817                                     IXGBE_ADVTXD_MACLEN_SHIFT);
5818                 if (skb->ip_summed == CHECKSUM_PARTIAL)
5819                         vlan_macip_lens |= (skb_transport_header(skb) -
5820                                             skb_network_header(skb));
5821
5822                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
5823                 context_desc->seqnum_seed = 0;
5824
5825                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
5826                                     IXGBE_ADVTXD_DTYP_CTXT);
5827
5828                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
5829                         __be16 protocol;
5830
5831                         if (skb->protocol == cpu_to_be16(ETH_P_8021Q)) {
5832                                 const struct vlan_ethhdr *vhdr =
5833                                         (const struct vlan_ethhdr *)skb->data;
5834
5835                                 protocol = vhdr->h_vlan_encapsulated_proto;
5836                         } else {
5837                                 protocol = skb->protocol;
5838                         }
5839
5840                         switch (protocol) {
5841                         case cpu_to_be16(ETH_P_IP):
5842                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
5843                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
5844                                         type_tucmd_mlhl |=
5845                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5846                                 else if (ip_hdr(skb)->protocol == IPPROTO_SCTP)
5847                                         type_tucmd_mlhl |=
5848                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5849                                 break;
5850                         case cpu_to_be16(ETH_P_IPV6):
5851                                 /* XXX what about other V6 headers?? */
5852                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
5853                                         type_tucmd_mlhl |=
5854                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
5855                                 else if (ipv6_hdr(skb)->nexthdr == IPPROTO_SCTP)
5856                                         type_tucmd_mlhl |=
5857                                                 IXGBE_ADVTXD_TUCMD_L4T_SCTP;
5858                                 break;
5859                         default:
5860                                 if (unlikely(net_ratelimit())) {
5861                                         e_warn(probe, "partial checksum "
5862                                                "but proto=%x!\n",
5863                                                skb->protocol);
5864                                 }
5865                                 break;
5866                         }
5867                 }
5868
5869                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
5870                 /* use index zero for tx checksum offload */
5871                 context_desc->mss_l4len_idx = 0;
5872
5873                 tx_buffer_info->time_stamp = jiffies;
5874                 tx_buffer_info->next_to_watch = i;
5875
5876                 i++;
5877                 if (i == tx_ring->count)
5878                         i = 0;
5879                 tx_ring->next_to_use = i;
5880
5881                 return true;
5882         }
5883
5884         return false;
5885 }
5886
5887 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
5888                         struct ixgbe_ring *tx_ring,
5889                         struct sk_buff *skb, u32 tx_flags,
5890                         unsigned int first)
5891 {
5892         struct pci_dev *pdev = adapter->pdev;
5893         struct ixgbe_tx_buffer *tx_buffer_info;
5894         unsigned int len;
5895         unsigned int total = skb->len;
5896         unsigned int offset = 0, size, count = 0, i;
5897         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
5898         unsigned int f;
5899
5900         i = tx_ring->next_to_use;
5901
5902         if (tx_flags & IXGBE_TX_FLAGS_FCOE)
5903                 /* excluding fcoe_crc_eof for FCoE */
5904                 total -= sizeof(struct fcoe_crc_eof);
5905
5906         len = min(skb_headlen(skb), total);
5907         while (len) {
5908                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5909                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5910
5911                 tx_buffer_info->length = size;
5912                 tx_buffer_info->mapped_as_page = false;
5913                 tx_buffer_info->dma = dma_map_single(&pdev->dev,
5914                                                      skb->data + offset,
5915                                                      size, DMA_TO_DEVICE);
5916                 if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
5917                         goto dma_error;
5918                 tx_buffer_info->time_stamp = jiffies;
5919                 tx_buffer_info->next_to_watch = i;
5920
5921                 len -= size;
5922                 total -= size;
5923                 offset += size;
5924                 count++;
5925
5926                 if (len) {
5927                         i++;
5928                         if (i == tx_ring->count)
5929                                 i = 0;
5930                 }
5931         }
5932
5933         for (f = 0; f < nr_frags; f++) {
5934                 struct skb_frag_struct *frag;
5935
5936                 frag = &skb_shinfo(skb)->frags[f];
5937                 len = min((unsigned int)frag->size, total);
5938                 offset = frag->page_offset;
5939
5940                 while (len) {
5941                         i++;
5942                         if (i == tx_ring->count)
5943                                 i = 0;
5944
5945                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
5946                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
5947
5948                         tx_buffer_info->length = size;
5949                         tx_buffer_info->dma = dma_map_page(&adapter->pdev->dev,
5950                                                            frag->page,
5951                                                            offset, size,
5952                                                            DMA_TO_DEVICE);
5953                         tx_buffer_info->mapped_as_page = true;
5954                         if (dma_mapping_error(&pdev->dev, tx_buffer_info->dma))
5955                                 goto dma_error;
5956                         tx_buffer_info->time_stamp = jiffies;
5957                         tx_buffer_info->next_to_watch = i;
5958
5959                         len -= size;
5960                         total -= size;
5961                         offset += size;
5962                         count++;
5963                 }
5964                 if (total == 0)
5965                         break;
5966         }
5967
5968         tx_ring->tx_buffer_info[i].skb = skb;
5969         tx_ring->tx_buffer_info[first].next_to_watch = i;
5970
5971         return count;
5972
5973 dma_error:
5974         e_dev_err("TX DMA map failed\n");
5975
5976         /* clear timestamp and dma mappings for failed tx_buffer_info map */
5977         tx_buffer_info->dma = 0;
5978         tx_buffer_info->time_stamp = 0;
5979         tx_buffer_info->next_to_watch = 0;
5980         if (count)
5981                 count--;
5982
5983         /* clear timestamp and dma mappings for remaining portion of packet */
5984         while (count--) {
5985                 if (i==0)
5986                         i += tx_ring->count;
5987                 i--;
5988                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
5989                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
5990         }
5991
5992         return 0;
5993 }
5994
5995 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
5996                            struct ixgbe_ring *tx_ring,
5997                            int tx_flags, int count, u32 paylen, u8 hdr_len)
5998 {
5999         union ixgbe_adv_tx_desc *tx_desc = NULL;
6000         struct ixgbe_tx_buffer *tx_buffer_info;
6001         u32 olinfo_status = 0, cmd_type_len = 0;
6002         unsigned int i;
6003         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
6004
6005         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
6006
6007         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
6008
6009         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
6010                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
6011
6012         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
6013                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6014
6015                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6016                                  IXGBE_ADVTXD_POPTS_SHIFT;
6017
6018                 /* use index 1 context for tso */
6019                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6020                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
6021                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
6022                                          IXGBE_ADVTXD_POPTS_SHIFT;
6023
6024         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
6025                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
6026                                  IXGBE_ADVTXD_POPTS_SHIFT;
6027
6028         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6029                 olinfo_status |= IXGBE_ADVTXD_CC;
6030                 olinfo_status |= (1 << IXGBE_ADVTXD_IDX_SHIFT);
6031                 if (tx_flags & IXGBE_TX_FLAGS_FSO)
6032                         cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
6033         }
6034
6035         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
6036
6037         i = tx_ring->next_to_use;
6038         while (count--) {
6039                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
6040                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
6041                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
6042                 tx_desc->read.cmd_type_len =
6043                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
6044                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
6045                 i++;
6046                 if (i == tx_ring->count)
6047                         i = 0;
6048         }
6049
6050         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
6051
6052         /*
6053          * Force memory writes to complete before letting h/w
6054          * know there are new descriptors to fetch.  (Only
6055          * applicable for weak-ordered memory model archs,
6056          * such as IA-64).
6057          */
6058         wmb();
6059
6060         tx_ring->next_to_use = i;
6061         writel(i, adapter->hw.hw_addr + tx_ring->tail);
6062 }
6063
6064 static void ixgbe_atr(struct ixgbe_adapter *adapter, struct sk_buff *skb,
6065                       int queue, u32 tx_flags)
6066 {
6067         struct ixgbe_atr_input atr_input;
6068         struct tcphdr *th;
6069         struct iphdr *iph = ip_hdr(skb);
6070         struct ethhdr *eth = (struct ethhdr *)skb->data;
6071         u16 vlan_id, src_port, dst_port, flex_bytes;
6072         u32 src_ipv4_addr, dst_ipv4_addr;
6073         u8 l4type = 0;
6074
6075         /* Right now, we support IPv4 only */
6076         if (skb->protocol != htons(ETH_P_IP))
6077                 return;
6078         /* check if we're UDP or TCP */
6079         if (iph->protocol == IPPROTO_TCP) {
6080                 th = tcp_hdr(skb);
6081                 src_port = th->source;
6082                 dst_port = th->dest;
6083                 l4type |= IXGBE_ATR_L4TYPE_TCP;
6084                 /* l4type IPv4 type is 0, no need to assign */
6085         } else {
6086                 /* Unsupported L4 header, just bail here */
6087                 return;
6088         }
6089
6090         memset(&atr_input, 0, sizeof(struct ixgbe_atr_input));
6091
6092         vlan_id = (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK) >>
6093                    IXGBE_TX_FLAGS_VLAN_SHIFT;
6094         src_ipv4_addr = iph->saddr;
6095         dst_ipv4_addr = iph->daddr;
6096         flex_bytes = eth->h_proto;
6097
6098         ixgbe_atr_set_vlan_id_82599(&atr_input, vlan_id);
6099         ixgbe_atr_set_src_port_82599(&atr_input, dst_port);
6100         ixgbe_atr_set_dst_port_82599(&atr_input, src_port);
6101         ixgbe_atr_set_flex_byte_82599(&atr_input, flex_bytes);
6102         ixgbe_atr_set_l4type_82599(&atr_input, l4type);
6103         /* src and dst are inverted, think how the receiver sees them */
6104         ixgbe_atr_set_src_ipv4_82599(&atr_input, dst_ipv4_addr);
6105         ixgbe_atr_set_dst_ipv4_82599(&atr_input, src_ipv4_addr);
6106
6107         /* This assumes the Rx queue and Tx queue are bound to the same CPU */
6108         ixgbe_fdir_add_signature_filter_82599(&adapter->hw, &atr_input, queue);
6109 }
6110
6111 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
6112                                  struct ixgbe_ring *tx_ring, int size)
6113 {
6114         netif_stop_subqueue(netdev, tx_ring->queue_index);
6115         /* Herbert's original patch had:
6116          *  smp_mb__after_netif_stop_queue();
6117          * but since that doesn't exist yet, just open code it. */
6118         smp_mb();
6119
6120         /* We need to check again in a case another CPU has just
6121          * made room available. */
6122         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
6123                 return -EBUSY;
6124
6125         /* A reprieve! - use start_queue because it doesn't call schedule */
6126         netif_start_subqueue(netdev, tx_ring->queue_index);
6127         ++tx_ring->restart_queue;
6128         return 0;
6129 }
6130
6131 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
6132                               struct ixgbe_ring *tx_ring, int size)
6133 {
6134         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
6135                 return 0;
6136         return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
6137 }
6138
6139 static u16 ixgbe_select_queue(struct net_device *dev, struct sk_buff *skb)
6140 {
6141         struct ixgbe_adapter *adapter = netdev_priv(dev);
6142         int txq = smp_processor_id();
6143
6144 #ifdef IXGBE_FCOE
6145         if ((skb->protocol == htons(ETH_P_FCOE)) ||
6146             (skb->protocol == htons(ETH_P_FIP))) {
6147                 if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED) {
6148                         txq &= (adapter->ring_feature[RING_F_FCOE].indices - 1);
6149                         txq += adapter->ring_feature[RING_F_FCOE].mask;
6150                         return txq;
6151 #ifdef CONFIG_IXGBE_DCB
6152                 } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6153                         txq = adapter->fcoe.up;
6154                         return txq;
6155 #endif
6156                 }
6157         }
6158 #endif
6159
6160         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE) {
6161                 while (unlikely(txq >= dev->real_num_tx_queues))
6162                         txq -= dev->real_num_tx_queues;
6163                 return txq;
6164         }
6165
6166         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6167                 if (skb->priority == TC_PRIO_CONTROL)
6168                         txq = adapter->ring_feature[RING_F_DCB].indices-1;
6169                 else
6170                         txq = (skb->vlan_tci & IXGBE_TX_FLAGS_VLAN_PRIO_MASK)
6171                                >> 13;
6172                 return txq;
6173         }
6174
6175         return skb_tx_hash(dev, skb);
6176 }
6177
6178 static netdev_tx_t ixgbe_xmit_frame(struct sk_buff *skb,
6179                                     struct net_device *netdev)
6180 {
6181         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6182         struct ixgbe_ring *tx_ring;
6183         struct netdev_queue *txq;
6184         unsigned int first;
6185         unsigned int tx_flags = 0;
6186         u8 hdr_len = 0;
6187         int tso;
6188         int count = 0;
6189         unsigned int f;
6190
6191         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
6192                 tx_flags |= vlan_tx_tag_get(skb);
6193                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6194                         tx_flags &= ~IXGBE_TX_FLAGS_VLAN_PRIO_MASK;
6195                         tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6196                 }
6197                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6198                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6199         } else if (adapter->flags & IXGBE_FLAG_DCB_ENABLED &&
6200                    skb->priority != TC_PRIO_CONTROL) {
6201                 tx_flags |= ((skb->queue_mapping & 0x7) << 13);
6202                 tx_flags <<= IXGBE_TX_FLAGS_VLAN_SHIFT;
6203                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
6204         }
6205
6206         tx_ring = adapter->tx_ring[skb->queue_mapping];
6207
6208 #ifdef IXGBE_FCOE
6209         /* for FCoE with DCB, we force the priority to what
6210          * was specified by the switch */
6211         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED &&
6212             (skb->protocol == htons(ETH_P_FCOE) ||
6213              skb->protocol == htons(ETH_P_FIP))) {
6214 #ifdef CONFIG_IXGBE_DCB
6215                 if (adapter->flags & IXGBE_FLAG_DCB_ENABLED) {
6216                         tx_flags &= ~(IXGBE_TX_FLAGS_VLAN_PRIO_MASK
6217                                       << IXGBE_TX_FLAGS_VLAN_SHIFT);
6218                         tx_flags |= ((adapter->fcoe.up << 13)
6219                                       << IXGBE_TX_FLAGS_VLAN_SHIFT);
6220                 }
6221 #endif
6222                 /* flag for FCoE offloads */
6223                 if (skb->protocol == htons(ETH_P_FCOE))
6224                         tx_flags |= IXGBE_TX_FLAGS_FCOE;
6225         }
6226 #endif
6227
6228         /* four things can cause us to need a context descriptor */
6229         if (skb_is_gso(skb) ||
6230             (skb->ip_summed == CHECKSUM_PARTIAL) ||
6231             (tx_flags & IXGBE_TX_FLAGS_VLAN) ||
6232             (tx_flags & IXGBE_TX_FLAGS_FCOE))
6233                 count++;
6234
6235         count += TXD_USE_COUNT(skb_headlen(skb));
6236         for (f = 0; f < skb_shinfo(skb)->nr_frags; f++)
6237                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
6238
6239         if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
6240                 adapter->tx_busy++;
6241                 return NETDEV_TX_BUSY;
6242         }
6243
6244         first = tx_ring->next_to_use;
6245         if (tx_flags & IXGBE_TX_FLAGS_FCOE) {
6246 #ifdef IXGBE_FCOE
6247                 /* setup tx offload for FCoE */
6248                 tso = ixgbe_fso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6249                 if (tso < 0) {
6250                         dev_kfree_skb_any(skb);
6251                         return NETDEV_TX_OK;
6252                 }
6253                 if (tso)
6254                         tx_flags |= IXGBE_TX_FLAGS_FSO;
6255 #endif /* IXGBE_FCOE */
6256         } else {
6257                 if (skb->protocol == htons(ETH_P_IP))
6258                         tx_flags |= IXGBE_TX_FLAGS_IPV4;
6259                 tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
6260                 if (tso < 0) {
6261                         dev_kfree_skb_any(skb);
6262                         return NETDEV_TX_OK;
6263                 }
6264
6265                 if (tso)
6266                         tx_flags |= IXGBE_TX_FLAGS_TSO;
6267                 else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
6268                          (skb->ip_summed == CHECKSUM_PARTIAL))
6269                         tx_flags |= IXGBE_TX_FLAGS_CSUM;
6270         }
6271
6272         count = ixgbe_tx_map(adapter, tx_ring, skb, tx_flags, first);
6273         if (count) {
6274                 /* add the ATR filter if ATR is on */
6275                 if (tx_ring->atr_sample_rate) {
6276                         ++tx_ring->atr_count;
6277                         if ((tx_ring->atr_count >= tx_ring->atr_sample_rate) &&
6278                              test_bit(__IXGBE_FDIR_INIT_DONE,
6279                                       &tx_ring->reinit_state)) {
6280                                 ixgbe_atr(adapter, skb, tx_ring->queue_index,
6281                                           tx_flags);
6282                                 tx_ring->atr_count = 0;
6283                         }
6284                 }
6285                 txq = netdev_get_tx_queue(netdev, tx_ring->queue_index);
6286                 txq->tx_bytes += skb->len;
6287                 txq->tx_packets++;
6288                 ixgbe_tx_queue(adapter, tx_ring, tx_flags, count, skb->len,
6289                                hdr_len);
6290                 ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
6291
6292         } else {
6293                 dev_kfree_skb_any(skb);
6294                 tx_ring->tx_buffer_info[first].time_stamp = 0;
6295                 tx_ring->next_to_use = first;
6296         }
6297
6298         return NETDEV_TX_OK;
6299 }
6300
6301 /**
6302  * ixgbe_set_mac - Change the Ethernet Address of the NIC
6303  * @netdev: network interface device structure
6304  * @p: pointer to an address structure
6305  *
6306  * Returns 0 on success, negative on failure
6307  **/
6308 static int ixgbe_set_mac(struct net_device *netdev, void *p)
6309 {
6310         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6311         struct ixgbe_hw *hw = &adapter->hw;
6312         struct sockaddr *addr = p;
6313
6314         if (!is_valid_ether_addr(addr->sa_data))
6315                 return -EADDRNOTAVAIL;
6316
6317         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
6318         memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
6319
6320         hw->mac.ops.set_rar(hw, 0, hw->mac.addr, adapter->num_vfs,
6321                             IXGBE_RAH_AV);
6322
6323         return 0;
6324 }
6325
6326 static int
6327 ixgbe_mdio_read(struct net_device *netdev, int prtad, int devad, u16 addr)
6328 {
6329         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6330         struct ixgbe_hw *hw = &adapter->hw;
6331         u16 value;
6332         int rc;
6333
6334         if (prtad != hw->phy.mdio.prtad)
6335                 return -EINVAL;
6336         rc = hw->phy.ops.read_reg(hw, addr, devad, &value);
6337         if (!rc)
6338                 rc = value;
6339         return rc;
6340 }
6341
6342 static int ixgbe_mdio_write(struct net_device *netdev, int prtad, int devad,
6343                             u16 addr, u16 value)
6344 {
6345         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6346         struct ixgbe_hw *hw = &adapter->hw;
6347
6348         if (prtad != hw->phy.mdio.prtad)
6349                 return -EINVAL;
6350         return hw->phy.ops.write_reg(hw, addr, devad, value);
6351 }
6352
6353 static int ixgbe_ioctl(struct net_device *netdev, struct ifreq *req, int cmd)
6354 {
6355         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6356
6357         return mdio_mii_ioctl(&adapter->hw.phy.mdio, if_mii(req), cmd);
6358 }
6359
6360 /**
6361  * ixgbe_add_sanmac_netdev - Add the SAN MAC address to the corresponding
6362  * netdev->dev_addrs
6363  * @netdev: network interface device structure
6364  *
6365  * Returns non-zero on failure
6366  **/
6367 static int ixgbe_add_sanmac_netdev(struct net_device *dev)
6368 {
6369         int err = 0;
6370         struct ixgbe_adapter *adapter = netdev_priv(dev);
6371         struct ixgbe_mac_info *mac = &adapter->hw.mac;
6372
6373         if (is_valid_ether_addr(mac->san_addr)) {
6374                 rtnl_lock();
6375                 err = dev_addr_add(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6376                 rtnl_unlock();
6377         }
6378         return err;
6379 }
6380
6381 /**
6382  * ixgbe_del_sanmac_netdev - Removes the SAN MAC address to the corresponding
6383  * netdev->dev_addrs
6384  * @netdev: network interface device structure
6385  *
6386  * Returns non-zero on failure
6387  **/
6388 static int ixgbe_del_sanmac_netdev(struct net_device *dev)
6389 {
6390         int err = 0;
6391         struct ixgbe_adapter *adapter = netdev_priv(dev);
6392         struct ixgbe_mac_info *mac = &adapter->hw.mac;
6393
6394         if (is_valid_ether_addr(mac->san_addr)) {
6395                 rtnl_lock();
6396                 err = dev_addr_del(dev, mac->san_addr, NETDEV_HW_ADDR_T_SAN);
6397                 rtnl_unlock();
6398         }
6399         return err;
6400 }
6401
6402 #ifdef CONFIG_NET_POLL_CONTROLLER
6403 /*
6404  * Polling 'interrupt' - used by things like netconsole to send skbs
6405  * without having to re-enable interrupts. It's not called while
6406  * the interrupt routine is executing.
6407  */
6408 static void ixgbe_netpoll(struct net_device *netdev)
6409 {
6410         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6411         int i;
6412
6413         /* if interface is down do nothing */
6414         if (test_bit(__IXGBE_DOWN, &adapter->state))
6415                 return;
6416
6417         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
6418         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
6419                 int num_q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
6420                 for (i = 0; i < num_q_vectors; i++) {
6421                         struct ixgbe_q_vector *q_vector = adapter->q_vector[i];
6422                         ixgbe_msix_clean_many(0, q_vector);
6423                 }
6424         } else {
6425                 ixgbe_intr(adapter->pdev->irq, netdev);
6426         }
6427         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
6428 }
6429 #endif
6430
6431 static const struct net_device_ops ixgbe_netdev_ops = {
6432         .ndo_open               = ixgbe_open,
6433         .ndo_stop               = ixgbe_close,
6434         .ndo_start_xmit         = ixgbe_xmit_frame,
6435         .ndo_select_queue       = ixgbe_select_queue,
6436         .ndo_set_rx_mode        = ixgbe_set_rx_mode,
6437         .ndo_set_multicast_list = ixgbe_set_rx_mode,
6438         .ndo_validate_addr      = eth_validate_addr,
6439         .ndo_set_mac_address    = ixgbe_set_mac,
6440         .ndo_change_mtu         = ixgbe_change_mtu,
6441         .ndo_tx_timeout         = ixgbe_tx_timeout,
6442         .ndo_vlan_rx_register   = ixgbe_vlan_rx_register,
6443         .ndo_vlan_rx_add_vid    = ixgbe_vlan_rx_add_vid,
6444         .ndo_vlan_rx_kill_vid   = ixgbe_vlan_rx_kill_vid,
6445         .ndo_do_ioctl           = ixgbe_ioctl,
6446         .ndo_set_vf_mac         = ixgbe_ndo_set_vf_mac,
6447         .ndo_set_vf_vlan        = ixgbe_ndo_set_vf_vlan,
6448         .ndo_set_vf_tx_rate     = ixgbe_ndo_set_vf_bw,
6449         .ndo_get_vf_config      = ixgbe_ndo_get_vf_config,
6450 #ifdef CONFIG_NET_POLL_CONTROLLER
6451         .ndo_poll_controller    = ixgbe_netpoll,
6452 #endif
6453 #ifdef IXGBE_FCOE
6454         .ndo_fcoe_ddp_setup = ixgbe_fcoe_ddp_get,
6455         .ndo_fcoe_ddp_done = ixgbe_fcoe_ddp_put,
6456         .ndo_fcoe_enable = ixgbe_fcoe_enable,
6457         .ndo_fcoe_disable = ixgbe_fcoe_disable,
6458         .ndo_fcoe_get_wwn = ixgbe_fcoe_get_wwn,
6459 #endif /* IXGBE_FCOE */
6460 };
6461
6462 static void __devinit ixgbe_probe_vf(struct ixgbe_adapter *adapter,
6463                            const struct ixgbe_info *ii)
6464 {
6465 #ifdef CONFIG_PCI_IOV
6466         struct ixgbe_hw *hw = &adapter->hw;
6467         int err;
6468
6469         if (hw->mac.type != ixgbe_mac_82599EB || !max_vfs)
6470                 return;
6471
6472         /* The 82599 supports up to 64 VFs per physical function
6473          * but this implementation limits allocation to 63 so that
6474          * basic networking resources are still available to the
6475          * physical function
6476          */
6477         adapter->num_vfs = (max_vfs > 63) ? 63 : max_vfs;
6478         adapter->flags |= IXGBE_FLAG_SRIOV_ENABLED;
6479         err = pci_enable_sriov(adapter->pdev, adapter->num_vfs);
6480         if (err) {
6481                 e_err(probe, "Failed to enable PCI sriov: %d\n", err);
6482                 goto err_novfs;
6483         }
6484         /* If call to enable VFs succeeded then allocate memory
6485          * for per VF control structures.
6486          */
6487         adapter->vfinfo =
6488                 kcalloc(adapter->num_vfs,
6489                         sizeof(struct vf_data_storage), GFP_KERNEL);
6490         if (adapter->vfinfo) {
6491                 /* Now that we're sure SR-IOV is enabled
6492                  * and memory allocated set up the mailbox parameters
6493                  */
6494                 ixgbe_init_mbx_params_pf(hw);
6495                 memcpy(&hw->mbx.ops, ii->mbx_ops,
6496                        sizeof(hw->mbx.ops));
6497
6498                 /* Disable RSC when in SR-IOV mode */
6499                 adapter->flags2 &= ~(IXGBE_FLAG2_RSC_CAPABLE |
6500                                      IXGBE_FLAG2_RSC_ENABLED);
6501                 return;
6502         }
6503
6504         /* Oh oh */
6505         e_err(probe, "Unable to allocate memory for VF Data Storage - "
6506               "SRIOV disabled\n");
6507         pci_disable_sriov(adapter->pdev);
6508
6509 err_novfs:
6510         adapter->flags &= ~IXGBE_FLAG_SRIOV_ENABLED;
6511         adapter->num_vfs = 0;
6512 #endif /* CONFIG_PCI_IOV */
6513 }
6514
6515 /**
6516  * ixgbe_probe - Device Initialization Routine
6517  * @pdev: PCI device information struct
6518  * @ent: entry in ixgbe_pci_tbl
6519  *
6520  * Returns 0 on success, negative on failure
6521  *
6522  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
6523  * The OS initialization, configuring of the adapter private structure,
6524  * and a hardware reset occur.
6525  **/
6526 static int __devinit ixgbe_probe(struct pci_dev *pdev,
6527                                  const struct pci_device_id *ent)
6528 {
6529         struct net_device *netdev;
6530         struct ixgbe_adapter *adapter = NULL;
6531         struct ixgbe_hw *hw;
6532         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
6533         static int cards_found;
6534         int i, err, pci_using_dac;
6535         unsigned int indices = num_possible_cpus();
6536 #ifdef IXGBE_FCOE
6537         u16 device_caps;
6538 #endif
6539         u32 part_num, eec;
6540
6541         /* Catch broken hardware that put the wrong VF device ID in
6542          * the PCIe SR-IOV capability.
6543          */
6544         if (pdev->is_virtfn) {
6545                 WARN(1, KERN_ERR "%s (%hx:%hx) should not be a VF!\n",
6546                      pci_name(pdev), pdev->vendor, pdev->device);
6547                 return -EINVAL;
6548         }
6549
6550         err = pci_enable_device_mem(pdev);
6551         if (err)
6552                 return err;
6553
6554         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64)) &&
6555             !dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64))) {
6556                 pci_using_dac = 1;
6557         } else {
6558                 err = dma_set_mask(&pdev->dev, DMA_BIT_MASK(32));
6559                 if (err) {
6560                         err = dma_set_coherent_mask(&pdev->dev,
6561                                                     DMA_BIT_MASK(32));
6562                         if (err) {
6563                                 dev_err(&pdev->dev,
6564                                         "No usable DMA configuration, aborting\n");
6565                                 goto err_dma;
6566                         }
6567                 }
6568                 pci_using_dac = 0;
6569         }
6570
6571         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
6572                                            IORESOURCE_MEM), ixgbe_driver_name);
6573         if (err) {
6574                 dev_err(&pdev->dev,
6575                         "pci_request_selected_regions failed 0x%x\n", err);
6576                 goto err_pci_reg;
6577         }
6578
6579         pci_enable_pcie_error_reporting(pdev);
6580
6581         pci_set_master(pdev);
6582         pci_save_state(pdev);
6583
6584         if (ii->mac == ixgbe_mac_82598EB)
6585                 indices = min_t(unsigned int, indices, IXGBE_MAX_RSS_INDICES);
6586         else
6587                 indices = min_t(unsigned int, indices, IXGBE_MAX_FDIR_INDICES);
6588
6589         indices = max_t(unsigned int, indices, IXGBE_MAX_DCB_INDICES);
6590 #ifdef IXGBE_FCOE
6591         indices += min_t(unsigned int, num_possible_cpus(),
6592                          IXGBE_MAX_FCOE_INDICES);
6593 #endif
6594         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), indices);
6595         if (!netdev) {
6596                 err = -ENOMEM;
6597                 goto err_alloc_etherdev;
6598         }
6599
6600         SET_NETDEV_DEV(netdev, &pdev->dev);
6601
6602         pci_set_drvdata(pdev, netdev);
6603         adapter = netdev_priv(netdev);
6604
6605         adapter->netdev = netdev;
6606         adapter->pdev = pdev;
6607         hw = &adapter->hw;
6608         hw->back = adapter;
6609         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
6610
6611         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
6612                               pci_resource_len(pdev, 0));
6613         if (!hw->hw_addr) {
6614                 err = -EIO;
6615                 goto err_ioremap;
6616         }
6617
6618         for (i = 1; i <= 5; i++) {
6619                 if (pci_resource_len(pdev, i) == 0)
6620                         continue;
6621         }
6622
6623         netdev->netdev_ops = &ixgbe_netdev_ops;
6624         ixgbe_set_ethtool_ops(netdev);
6625         netdev->watchdog_timeo = 5 * HZ;
6626         strcpy(netdev->name, pci_name(pdev));
6627
6628         adapter->bd_number = cards_found;
6629
6630         /* Setup hw api */
6631         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
6632         hw->mac.type  = ii->mac;
6633
6634         /* EEPROM */
6635         memcpy(&hw->eeprom.ops, ii->eeprom_ops, sizeof(hw->eeprom.ops));
6636         eec = IXGBE_READ_REG(hw, IXGBE_EEC);
6637         /* If EEPROM is valid (bit 8 = 1), use default otherwise use bit bang */
6638         if (!(eec & (1 << 8)))
6639                 hw->eeprom.ops.read = &ixgbe_read_eeprom_bit_bang_generic;
6640
6641         /* PHY */
6642         memcpy(&hw->phy.ops, ii->phy_ops, sizeof(hw->phy.ops));
6643         hw->phy.sfp_type = ixgbe_sfp_type_unknown;
6644         /* ixgbe_identify_phy_generic will set prtad and mmds properly */
6645         hw->phy.mdio.prtad = MDIO_PRTAD_NONE;
6646         hw->phy.mdio.mmds = 0;
6647         hw->phy.mdio.mode_support = MDIO_SUPPORTS_C45 | MDIO_EMULATE_C22;
6648         hw->phy.mdio.dev = netdev;
6649         hw->phy.mdio.mdio_read = ixgbe_mdio_read;
6650         hw->phy.mdio.mdio_write = ixgbe_mdio_write;
6651
6652         /* set up this timer and work struct before calling get_invariants
6653          * which might start the timer
6654          */
6655         init_timer(&adapter->sfp_timer);
6656         adapter->sfp_timer.function = &ixgbe_sfp_timer;
6657         adapter->sfp_timer.data = (unsigned long) adapter;
6658
6659         INIT_WORK(&adapter->sfp_task, ixgbe_sfp_task);
6660
6661         /* multispeed fiber has its own tasklet, called from GPI SDP1 context */
6662         INIT_WORK(&adapter->multispeed_fiber_task, ixgbe_multispeed_fiber_task);
6663
6664         /* a new SFP+ module arrival, called from GPI SDP2 context */
6665         INIT_WORK(&adapter->sfp_config_module_task,
6666                   ixgbe_sfp_config_module_task);
6667
6668         ii->get_invariants(hw);
6669
6670         /* setup the private structure */
6671         err = ixgbe_sw_init(adapter);
6672         if (err)
6673                 goto err_sw_init;
6674
6675         /* Make it possible the adapter to be woken up via WOL */
6676         if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6677                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
6678
6679         /*
6680          * If there is a fan on this device and it has failed log the
6681          * failure.
6682          */
6683         if (adapter->flags & IXGBE_FLAG_FAN_FAIL_CAPABLE) {
6684                 u32 esdp = IXGBE_READ_REG(hw, IXGBE_ESDP);
6685                 if (esdp & IXGBE_ESDP_SDP1)
6686                         e_crit(probe, "Fan has stopped, replace the adapter\n");
6687         }
6688
6689         /* reset_hw fills in the perm_addr as well */
6690         hw->phy.reset_if_overtemp = true;
6691         err = hw->mac.ops.reset_hw(hw);
6692         hw->phy.reset_if_overtemp = false;
6693         if (err == IXGBE_ERR_SFP_NOT_PRESENT &&
6694             hw->mac.type == ixgbe_mac_82598EB) {
6695                 /*
6696                  * Start a kernel thread to watch for a module to arrive.
6697                  * Only do this for 82598, since 82599 will generate
6698                  * interrupts on module arrival.
6699                  */
6700                 set_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6701                 mod_timer(&adapter->sfp_timer,
6702                           round_jiffies(jiffies + (2 * HZ)));
6703                 err = 0;
6704         } else if (err == IXGBE_ERR_SFP_NOT_SUPPORTED) {
6705                 e_dev_err("failed to initialize because an unsupported SFP+ "
6706                           "module type was detected.\n");
6707                 e_dev_err("Reload the driver after installing a supported "
6708                           "module.\n");
6709                 goto err_sw_init;
6710         } else if (err) {
6711                 e_dev_err("HW Init failed: %d\n", err);
6712                 goto err_sw_init;
6713         }
6714
6715         ixgbe_probe_vf(adapter, ii);
6716
6717         netdev->features = NETIF_F_SG |
6718                            NETIF_F_IP_CSUM |
6719                            NETIF_F_HW_VLAN_TX |
6720                            NETIF_F_HW_VLAN_RX |
6721                            NETIF_F_HW_VLAN_FILTER;
6722
6723         netdev->features |= NETIF_F_IPV6_CSUM;
6724         netdev->features |= NETIF_F_TSO;
6725         netdev->features |= NETIF_F_TSO6;
6726         netdev->features |= NETIF_F_GRO;
6727
6728         if (adapter->hw.mac.type == ixgbe_mac_82599EB)
6729                 netdev->features |= NETIF_F_SCTP_CSUM;
6730
6731         netdev->vlan_features |= NETIF_F_TSO;
6732         netdev->vlan_features |= NETIF_F_TSO6;
6733         netdev->vlan_features |= NETIF_F_IP_CSUM;
6734         netdev->vlan_features |= NETIF_F_IPV6_CSUM;
6735         netdev->vlan_features |= NETIF_F_SG;
6736
6737         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6738                 adapter->flags &= ~(IXGBE_FLAG_RSS_ENABLED |
6739                                     IXGBE_FLAG_DCB_ENABLED);
6740         if (adapter->flags & IXGBE_FLAG_DCB_ENABLED)
6741                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
6742
6743 #ifdef CONFIG_IXGBE_DCB
6744         netdev->dcbnl_ops = &dcbnl_ops;
6745 #endif
6746
6747 #ifdef IXGBE_FCOE
6748         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6749                 if (hw->mac.ops.get_device_caps) {
6750                         hw->mac.ops.get_device_caps(hw, &device_caps);
6751                         if (device_caps & IXGBE_DEVICE_CAPS_FCOE_OFFLOADS)
6752                                 adapter->flags &= ~IXGBE_FLAG_FCOE_CAPABLE;
6753                 }
6754         }
6755         if (adapter->flags & IXGBE_FLAG_FCOE_CAPABLE) {
6756                 netdev->vlan_features |= NETIF_F_FCOE_CRC;
6757                 netdev->vlan_features |= NETIF_F_FSO;
6758                 netdev->vlan_features |= NETIF_F_FCOE_MTU;
6759         }
6760 #endif /* IXGBE_FCOE */
6761         if (pci_using_dac)
6762                 netdev->features |= NETIF_F_HIGHDMA;
6763
6764         if (adapter->flags2 & IXGBE_FLAG2_RSC_ENABLED)
6765                 netdev->features |= NETIF_F_LRO;
6766
6767         /* make sure the EEPROM is good */
6768         if (hw->eeprom.ops.validate_checksum(hw, NULL) < 0) {
6769                 e_dev_err("The EEPROM Checksum Is Not Valid\n");
6770                 err = -EIO;
6771                 goto err_eeprom;
6772         }
6773
6774         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
6775         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
6776
6777         if (ixgbe_validate_mac_addr(netdev->perm_addr)) {
6778                 e_dev_err("invalid MAC address\n");
6779                 err = -EIO;
6780                 goto err_eeprom;
6781         }
6782
6783         /* power down the optics */
6784         if (hw->phy.multispeed_fiber)
6785                 hw->mac.ops.disable_tx_laser(hw);
6786
6787         init_timer(&adapter->watchdog_timer);
6788         adapter->watchdog_timer.function = &ixgbe_watchdog;
6789         adapter->watchdog_timer.data = (unsigned long)adapter;
6790
6791         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
6792         INIT_WORK(&adapter->watchdog_task, ixgbe_watchdog_task);
6793
6794         err = ixgbe_init_interrupt_scheme(adapter);
6795         if (err)
6796                 goto err_sw_init;
6797
6798         switch (pdev->device) {
6799         case IXGBE_DEV_ID_82599_KX4:
6800                 adapter->wol = (IXGBE_WUFC_MAG | IXGBE_WUFC_EX |
6801                                 IXGBE_WUFC_MC | IXGBE_WUFC_BC);
6802                 break;
6803         default:
6804                 adapter->wol = 0;
6805                 break;
6806         }
6807         device_set_wakeup_enable(&adapter->pdev->dev, adapter->wol);
6808
6809         /* pick up the PCI bus settings for reporting later */
6810         hw->mac.ops.get_bus_info(hw);
6811
6812         /* print bus type/speed/width info */
6813         e_dev_info("(PCI Express:%s:%s) %pM\n",
6814                 ((hw->bus.speed == ixgbe_bus_speed_5000) ? "5.0Gb/s":
6815                  (hw->bus.speed == ixgbe_bus_speed_2500) ? "2.5Gb/s":"Unknown"),
6816                 ((hw->bus.width == ixgbe_bus_width_pcie_x8) ? "Width x8" :
6817                  (hw->bus.width == ixgbe_bus_width_pcie_x4) ? "Width x4" :
6818                  (hw->bus.width == ixgbe_bus_width_pcie_x1) ? "Width x1" :
6819                  "Unknown"),
6820                 netdev->dev_addr);
6821         ixgbe_read_pba_num_generic(hw, &part_num);
6822         if (ixgbe_is_sfp(hw) && hw->phy.sfp_type != ixgbe_sfp_type_not_present)
6823                 e_dev_info("MAC: %d, PHY: %d, SFP+: %d, "
6824                            "PBA No: %06x-%03x\n",
6825                            hw->mac.type, hw->phy.type, hw->phy.sfp_type,
6826                            (part_num >> 8), (part_num & 0xff));
6827         else
6828                 e_dev_info("MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
6829                            hw->mac.type, hw->phy.type,
6830                            (part_num >> 8), (part_num & 0xff));
6831
6832         if (hw->bus.width <= ixgbe_bus_width_pcie_x4) {
6833                 e_dev_warn("PCI-Express bandwidth available for this card is "
6834                            "not sufficient for optimal performance.\n");
6835                 e_dev_warn("For optimal performance a x8 PCI-Express slot "
6836                            "is required.\n");
6837         }
6838
6839         /* save off EEPROM version number */
6840         hw->eeprom.ops.read(hw, 0x29, &adapter->eeprom_version);
6841
6842         /* reset the hardware with the new settings */
6843         err = hw->mac.ops.start_hw(hw);
6844
6845         if (err == IXGBE_ERR_EEPROM_VERSION) {
6846                 /* We are running on a pre-production device, log a warning */
6847                 e_dev_warn("This device is a pre-production adapter/LOM. "
6848                            "Please be aware there may be issues associated "
6849                            "with your hardware.  If you are experiencing "
6850                            "problems please contact your Intel or hardware "
6851                            "representative who provided you with this "
6852                            "hardware.\n");
6853         }
6854         strcpy(netdev->name, "eth%d");
6855         err = register_netdev(netdev);
6856         if (err)
6857                 goto err_register;
6858
6859         /* carrier off reporting is important to ethtool even BEFORE open */
6860         netif_carrier_off(netdev);
6861
6862         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6863             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6864                 INIT_WORK(&adapter->fdir_reinit_task, ixgbe_fdir_reinit_task);
6865
6866         if (adapter->flags2 & IXGBE_FLAG2_TEMP_SENSOR_CAPABLE)
6867                 INIT_WORK(&adapter->check_overtemp_task, ixgbe_check_overtemp_task);
6868 #ifdef CONFIG_IXGBE_DCA
6869         if (dca_add_requester(&pdev->dev) == 0) {
6870                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
6871                 ixgbe_setup_dca(adapter);
6872         }
6873 #endif
6874         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED) {
6875                 e_info(probe, "IOV is enabled with %d VFs\n", adapter->num_vfs);
6876                 for (i = 0; i < adapter->num_vfs; i++)
6877                         ixgbe_vf_configuration(pdev, (i | 0x10000000));
6878         }
6879
6880         /* add san mac addr to netdev */
6881         ixgbe_add_sanmac_netdev(netdev);
6882
6883         e_dev_info("Intel(R) 10 Gigabit Network Connection\n");
6884         cards_found++;
6885         return 0;
6886
6887 err_register:
6888         ixgbe_release_hw_control(adapter);
6889         ixgbe_clear_interrupt_scheme(adapter);
6890 err_sw_init:
6891 err_eeprom:
6892         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6893                 ixgbe_disable_sriov(adapter);
6894         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6895         del_timer_sync(&adapter->sfp_timer);
6896         cancel_work_sync(&adapter->sfp_task);
6897         cancel_work_sync(&adapter->multispeed_fiber_task);
6898         cancel_work_sync(&adapter->sfp_config_module_task);
6899         iounmap(hw->hw_addr);
6900 err_ioremap:
6901         free_netdev(netdev);
6902 err_alloc_etherdev:
6903         pci_release_selected_regions(pdev, pci_select_bars(pdev,
6904                                      IORESOURCE_MEM));
6905 err_pci_reg:
6906 err_dma:
6907         pci_disable_device(pdev);
6908         return err;
6909 }
6910
6911 /**
6912  * ixgbe_remove - Device Removal Routine
6913  * @pdev: PCI device information struct
6914  *
6915  * ixgbe_remove is called by the PCI subsystem to alert the driver
6916  * that it should release a PCI device.  The could be caused by a
6917  * Hot-Plug event, or because the driver is going to be removed from
6918  * memory.
6919  **/
6920 static void __devexit ixgbe_remove(struct pci_dev *pdev)
6921 {
6922         struct net_device *netdev = pci_get_drvdata(pdev);
6923         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6924
6925         set_bit(__IXGBE_DOWN, &adapter->state);
6926         /* clear the module not found bit to make sure the worker won't
6927          * reschedule
6928          */
6929         clear_bit(__IXGBE_SFP_MODULE_NOT_FOUND, &adapter->state);
6930         del_timer_sync(&adapter->watchdog_timer);
6931
6932         del_timer_sync(&adapter->sfp_timer);
6933         cancel_work_sync(&adapter->watchdog_task);
6934         cancel_work_sync(&adapter->sfp_task);
6935         cancel_work_sync(&adapter->multispeed_fiber_task);
6936         cancel_work_sync(&adapter->sfp_config_module_task);
6937         if (adapter->flags & IXGBE_FLAG_FDIR_HASH_CAPABLE ||
6938             adapter->flags & IXGBE_FLAG_FDIR_PERFECT_CAPABLE)
6939                 cancel_work_sync(&adapter->fdir_reinit_task);
6940         flush_scheduled_work();
6941
6942 #ifdef CONFIG_IXGBE_DCA
6943         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
6944                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
6945                 dca_remove_requester(&pdev->dev);
6946                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
6947         }
6948
6949 #endif
6950 #ifdef IXGBE_FCOE
6951         if (adapter->flags & IXGBE_FLAG_FCOE_ENABLED)
6952                 ixgbe_cleanup_fcoe(adapter);
6953
6954 #endif /* IXGBE_FCOE */
6955
6956         /* remove the added san mac */
6957         ixgbe_del_sanmac_netdev(netdev);
6958
6959         if (netdev->reg_state == NETREG_REGISTERED)
6960                 unregister_netdev(netdev);
6961
6962         if (adapter->flags & IXGBE_FLAG_SRIOV_ENABLED)
6963                 ixgbe_disable_sriov(adapter);
6964
6965         ixgbe_clear_interrupt_scheme(adapter);
6966
6967         ixgbe_release_hw_control(adapter);
6968
6969         iounmap(adapter->hw.hw_addr);
6970         pci_release_selected_regions(pdev, pci_select_bars(pdev,
6971                                      IORESOURCE_MEM));
6972
6973         e_dev_info("complete\n");
6974
6975         free_netdev(netdev);
6976
6977         pci_disable_pcie_error_reporting(pdev);
6978
6979         pci_disable_device(pdev);
6980 }
6981
6982 /**
6983  * ixgbe_io_error_detected - called when PCI error is detected
6984  * @pdev: Pointer to PCI device
6985  * @state: The current pci connection state
6986  *
6987  * This function is called after a PCI bus error affecting
6988  * this device has been detected.
6989  */
6990 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
6991                                                 pci_channel_state_t state)
6992 {
6993         struct net_device *netdev = pci_get_drvdata(pdev);
6994         struct ixgbe_adapter *adapter = netdev_priv(netdev);
6995
6996         netif_device_detach(netdev);
6997
6998         if (state == pci_channel_io_perm_failure)
6999                 return PCI_ERS_RESULT_DISCONNECT;
7000
7001         if (netif_running(netdev))
7002                 ixgbe_down(adapter);
7003         pci_disable_device(pdev);
7004
7005         /* Request a slot reset. */
7006         return PCI_ERS_RESULT_NEED_RESET;
7007 }
7008
7009 /**
7010  * ixgbe_io_slot_reset - called after the pci bus has been reset.
7011  * @pdev: Pointer to PCI device
7012  *
7013  * Restart the card from scratch, as if from a cold-boot.
7014  */
7015 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
7016 {
7017         struct net_device *netdev = pci_get_drvdata(pdev);
7018         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7019         pci_ers_result_t result;
7020         int err;
7021
7022         if (pci_enable_device_mem(pdev)) {
7023                 e_err(probe, "Cannot re-enable PCI device after reset.\n");
7024                 result = PCI_ERS_RESULT_DISCONNECT;
7025         } else {
7026                 pci_set_master(pdev);
7027                 pci_restore_state(pdev);
7028                 pci_save_state(pdev);
7029
7030                 pci_wake_from_d3(pdev, false);
7031
7032                 ixgbe_reset(adapter);
7033                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_WUS, ~0);
7034                 result = PCI_ERS_RESULT_RECOVERED;
7035         }
7036
7037         err = pci_cleanup_aer_uncorrect_error_status(pdev);
7038         if (err) {
7039                 e_dev_err("pci_cleanup_aer_uncorrect_error_status "
7040                           "failed 0x%0x\n", err);
7041                 /* non-fatal, continue */
7042         }
7043
7044         return result;
7045 }
7046
7047 /**
7048  * ixgbe_io_resume - called when traffic can start flowing again.
7049  * @pdev: Pointer to PCI device
7050  *
7051  * This callback is called when the error recovery driver tells us that
7052  * its OK to resume normal operation.
7053  */
7054 static void ixgbe_io_resume(struct pci_dev *pdev)
7055 {
7056         struct net_device *netdev = pci_get_drvdata(pdev);
7057         struct ixgbe_adapter *adapter = netdev_priv(netdev);
7058
7059         if (netif_running(netdev)) {
7060                 if (ixgbe_up(adapter)) {
7061                         e_info(probe, "ixgbe_up failed after reset\n");
7062                         return;
7063                 }
7064         }
7065
7066         netif_device_attach(netdev);
7067 }
7068
7069 static struct pci_error_handlers ixgbe_err_handler = {
7070         .error_detected = ixgbe_io_error_detected,
7071         .slot_reset = ixgbe_io_slot_reset,
7072         .resume = ixgbe_io_resume,
7073 };
7074
7075 static struct pci_driver ixgbe_driver = {
7076         .name     = ixgbe_driver_name,
7077         .id_table = ixgbe_pci_tbl,
7078         .probe    = ixgbe_probe,
7079         .remove   = __devexit_p(ixgbe_remove),
7080 #ifdef CONFIG_PM
7081         .suspend  = ixgbe_suspend,
7082         .resume   = ixgbe_resume,
7083 #endif
7084         .shutdown = ixgbe_shutdown,
7085         .err_handler = &ixgbe_err_handler
7086 };
7087
7088 /**
7089  * ixgbe_init_module - Driver Registration Routine
7090  *
7091  * ixgbe_init_module is the first routine called when the driver is
7092  * loaded. All it does is register with the PCI subsystem.
7093  **/
7094 static int __init ixgbe_init_module(void)
7095 {
7096         int ret;
7097         pr_info("%s - version %s\n", ixgbe_driver_string,
7098                    ixgbe_driver_version);
7099         pr_info("%s\n", ixgbe_copyright);
7100
7101 #ifdef CONFIG_IXGBE_DCA
7102         dca_register_notify(&dca_notifier);
7103 #endif
7104
7105         ret = pci_register_driver(&ixgbe_driver);
7106         return ret;
7107 }
7108
7109 module_init(ixgbe_init_module);
7110
7111 /**
7112  * ixgbe_exit_module - Driver Exit Cleanup Routine
7113  *
7114  * ixgbe_exit_module is called just before the driver is removed
7115  * from memory.
7116  **/
7117 static void __exit ixgbe_exit_module(void)
7118 {
7119 #ifdef CONFIG_IXGBE_DCA
7120         dca_unregister_notify(&dca_notifier);
7121 #endif
7122         pci_unregister_driver(&ixgbe_driver);
7123 }
7124
7125 #ifdef CONFIG_IXGBE_DCA
7126 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
7127                             void *p)
7128 {
7129         int ret_val;
7130
7131         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
7132                                          __ixgbe_notify_dca);
7133
7134         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
7135 }
7136
7137 #endif /* CONFIG_IXGBE_DCA */
7138
7139 /**
7140  * ixgbe_get_hw_dev return device
7141  * used by hardware layer to print debugging information
7142  **/
7143 struct net_device *ixgbe_get_hw_dev(struct ixgbe_hw *hw)
7144 {
7145         struct ixgbe_adapter *adapter = hw->back;
7146         return adapter->netdev;
7147 }
7148
7149 module_exit(ixgbe_exit_module);
7150
7151 /* ixgbe_main.c */