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   1 /*******************************************************************************
   2
   3   Intel 10 Gigabit PCI Express Linux driver
   4   Copyright(c) 1999 - 2007 Intel Corporation.
   5
   6   This program is free software; you can redistribute it and/or modify it
   7   under the terms and conditions of the GNU General Public License,
   8   version 2, as published by the Free Software Foundation.
   9
  10   This program is distributed in the hope it will be useful, but WITHOUT
  11   ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13   more details.
  14
  15   You should have received a copy of the GNU General Public License along with
  16   this program; if not, write to the Free Software Foundation, Inc.,
  17   51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
  18
  19   The full GNU General Public License is included in this distribution in
  20   the file called "COPYING".
  21
  22   Contact Information:
  23   Linux NICS <linux.nics@intel.com>
  24   e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  25   Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  26
  27 *******************************************************************************/
  28
  29 #include <linux/types.h>
  30 #include <linux/module.h>
  31 #include <linux/pci.h>
  32 #include <linux/netdevice.h>
  33 #include <linux/vmalloc.h>
  34 #include <linux/string.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/tcp.h>
  38 #include <linux/ipv6.h>
  39 #include <net/checksum.h>
  40 #include <net/ip6_checksum.h>
  41 #include <linux/ethtool.h>
  42 #include <linux/if_vlan.h>
  43
  44 #include "ixgbe.h"
  45 #include "ixgbe_common.h"
  46
  47 char ixgbe_driver_name[] = "ixgbe";
  48 static const char ixgbe_driver_string[] =
  49         "Intel(R) 10 Gigabit PCI Express Network Driver";
  50
  51 #define DRV_VERSION "1.3.18-k2"
  52 const char ixgbe_driver_version[] = DRV_VERSION;
  53 static const char ixgbe_copyright[] =
  54          "Copyright (c) 1999-2007 Intel Corporation.";
  55
  56 static const struct ixgbe_info *ixgbe_info_tbl[] = {
  57         [board_82598]                   = &ixgbe_82598_info,
  58 };
  59
  60 /* ixgbe_pci_tbl - PCI Device ID Table
  61  *
  62  * Wildcard entries (PCI_ANY_ID) should come last
  63  * Last entry must be all 0s
  64  *
  65  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  66  *   Class, Class Mask, private data (not used) }
  67  */
  68 static struct pci_device_id ixgbe_pci_tbl[] = {
  69         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_DUAL_PORT),
  70          board_82598 },
  71         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AF_SINGLE_PORT),
  72          board_82598 },
  73         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598AT_DUAL_PORT),
  74          board_82598 },
  75         {PCI_VDEVICE(INTEL, IXGBE_DEV_ID_82598EB_CX4),
  76          board_82598 },
  77
  78         /* required last entry */
  79         {0, }
  80 };
  81 MODULE_DEVICE_TABLE(pci, ixgbe_pci_tbl);
  82
  83 #ifdef CONFIG_DCA
  84 static int ixgbe_notify_dca(struct notifier_block *, unsigned long event,
  85                             void *p);
  86 static struct notifier_block dca_notifier = {
  87         .notifier_call = ixgbe_notify_dca,
  88         .next          = NULL,
  89         .priority      = 0
  90 };
  91 #endif
  92
  93 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  94 MODULE_DESCRIPTION("Intel(R) 10 Gigabit PCI Express Network Driver");
  95 MODULE_LICENSE("GPL");
  96 MODULE_VERSION(DRV_VERSION);
  97
  98 #define DEFAULT_DEBUG_LEVEL_SHIFT 3
  99
 100 static void ixgbe_release_hw_control(struct ixgbe_adapter *adapter)
 101 {
 102         u32 ctrl_ext;
 103
 104         /* Let firmware take over control of h/w */
 105         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 106         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 107                         ctrl_ext & ~IXGBE_CTRL_EXT_DRV_LOAD);
 108 }
 109
 110 static void ixgbe_get_hw_control(struct ixgbe_adapter *adapter)
 111 {
 112         u32 ctrl_ext;
 113
 114         /* Let firmware know the driver has taken over */
 115         ctrl_ext = IXGBE_READ_REG(&adapter->hw, IXGBE_CTRL_EXT);
 116         IXGBE_WRITE_REG(&adapter->hw, IXGBE_CTRL_EXT,
 117                         ctrl_ext | IXGBE_CTRL_EXT_DRV_LOAD);
 118 }
 119
 120 #ifdef DEBUG
 121 /**
 122  * ixgbe_get_hw_dev_name - return device name string
 123  * used by hardware layer to print debugging information
 124  **/
 125 char *ixgbe_get_hw_dev_name(struct ixgbe_hw *hw)
 126 {
 127         struct ixgbe_adapter *adapter = hw->back;
 128         struct net_device *netdev = adapter->netdev;
 129         return netdev->name;
 130 }
 131 #endif
 132
 133 static void ixgbe_set_ivar(struct ixgbe_adapter *adapter, u16 int_alloc_entry,
 134                            u8 msix_vector)
 135 {
 136         u32 ivar, index;
 137
 138         msix_vector |= IXGBE_IVAR_ALLOC_VAL;
 139         index = (int_alloc_entry >> 2) & 0x1F;
 140         ivar = IXGBE_READ_REG(&adapter->hw, IXGBE_IVAR(index));
 141         ivar &= ~(0xFF << (8 * (int_alloc_entry & 0x3)));
 142         ivar |= (msix_vector << (8 * (int_alloc_entry & 0x3)));
 143         IXGBE_WRITE_REG(&adapter->hw, IXGBE_IVAR(index), ivar);
 144 }
 145
 146 static void ixgbe_unmap_and_free_tx_resource(struct ixgbe_adapter *adapter,
 147                                              struct ixgbe_tx_buffer
 148                                              *tx_buffer_info)
 149 {
 150         if (tx_buffer_info->dma) {
 151                 pci_unmap_page(adapter->pdev,
 152                                tx_buffer_info->dma,
 153                                tx_buffer_info->length, PCI_DMA_TODEVICE);
 154                 tx_buffer_info->dma = 0;
 155         }
 156         if (tx_buffer_info->skb) {
 157                 dev_kfree_skb_any(tx_buffer_info->skb);
 158                 tx_buffer_info->skb = NULL;
 159         }
 160         /* tx_buffer_info must be completely set up in the transmit path */
 161 }
 162
 163 static inline bool ixgbe_check_tx_hang(struct ixgbe_adapter *adapter,
 164                                        struct ixgbe_ring *tx_ring,
 165                                        unsigned int eop,
 166                                        union ixgbe_adv_tx_desc *eop_desc)
 167 {
 168         /* Detect a transmit hang in hardware, this serializes the
 169          * check with the clearing of time_stamp and movement of i */
 170         adapter->detect_tx_hung = false;
 171         if (tx_ring->tx_buffer_info[eop].dma &&
 172             time_after(jiffies, tx_ring->tx_buffer_info[eop].time_stamp + HZ) &&
 173             !(IXGBE_READ_REG(&adapter->hw, IXGBE_TFCS) & IXGBE_TFCS_TXOFF)) {
 174                 /* detected Tx unit hang */
 175                 DPRINTK(DRV, ERR, "Detected Tx Unit Hang\n"
 176                         "  TDH                  <%x>\n"
 177                         "  TDT                  <%x>\n"
 178                         "  next_to_use          <%x>\n"
 179                         "  next_to_clean        <%x>\n"
 180                         "tx_buffer_info[next_to_clean]\n"
 181                         "  time_stamp           <%lx>\n"
 182                         "  next_to_watch        <%x>\n"
 183                         "  jiffies              <%lx>\n"
 184                         "  next_to_watch.status <%x>\n",
 185                         readl(adapter->hw.hw_addr + tx_ring->head),
 186                         readl(adapter->hw.hw_addr + tx_ring->tail),
 187                         tx_ring->next_to_use,
 188                         tx_ring->next_to_clean,
 189                         tx_ring->tx_buffer_info[eop].time_stamp,
 190                         eop, jiffies, eop_desc->wb.status);
 191                 return true;
 192         }
 193
 194         return false;
 195 }
 196
 197 #define IXGBE_MAX_TXD_PWR       14
 198 #define IXGBE_MAX_DATA_PER_TXD  (1 << IXGBE_MAX_TXD_PWR)
 199
 200 /* Tx Descriptors needed, worst case */
 201 #define TXD_USE_COUNT(S) (((S) >> IXGBE_MAX_TXD_PWR) + \
 202                          (((S) & (IXGBE_MAX_DATA_PER_TXD - 1)) ? 1 : 0))
 203 #define DESC_NEEDED (TXD_USE_COUNT(IXGBE_MAX_DATA_PER_TXD) /* skb->data */ + \
 204         MAX_SKB_FRAGS * TXD_USE_COUNT(PAGE_SIZE) + 1)   /* for context */
 205
 206 /**
 207  * ixgbe_clean_tx_irq - Reclaim resources after transmit completes
 208  * @adapter: board private structure
 209  **/
 210 static bool ixgbe_clean_tx_irq(struct ixgbe_adapter *adapter,
 211                                     struct ixgbe_ring *tx_ring)
 212 {
 213         struct net_device *netdev = adapter->netdev;
 214         union ixgbe_adv_tx_desc *tx_desc, *eop_desc;
 215         struct ixgbe_tx_buffer *tx_buffer_info;
 216         unsigned int i, eop;
 217         bool cleaned = false;
 218         unsigned int total_tx_bytes = 0, total_tx_packets = 0;
 219
 220         i = tx_ring->next_to_clean;
 221         eop = tx_ring->tx_buffer_info[i].next_to_watch;
 222         eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 223         while (eop_desc->wb.status & cpu_to_le32(IXGBE_TXD_STAT_DD)) {
 224                 cleaned = false;
 225                 while (!cleaned) {
 226                         tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
 227                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
 228                         cleaned = (i == eop);
 229
 230                         tx_ring->stats.bytes += tx_buffer_info->length;
 231                         if (cleaned) {
 232                                 struct sk_buff *skb = tx_buffer_info->skb;
 233                                 unsigned int segs, bytecount;
 234                                 segs = skb_shinfo(skb)->gso_segs ?: 1;
 235                                 /* multiply data chunks by size of headers */
 236                                 bytecount = ((segs - 1) * skb_headlen(skb)) +
 237                                             skb->len;
 238                                 total_tx_packets += segs;
 239                                 total_tx_bytes += bytecount;
 240                         }
 241                         ixgbe_unmap_and_free_tx_resource(adapter,
 242                                                          tx_buffer_info);
 243                         tx_desc->wb.status = 0;
 244
 245                         i++;
 246                         if (i == tx_ring->count)
 247                                 i = 0;
 248                 }
 249
 250                 tx_ring->stats.packets++;
 251
 252                 eop = tx_ring->tx_buffer_info[i].next_to_watch;
 253                 eop_desc = IXGBE_TX_DESC_ADV(*tx_ring, eop);
 254
 255                 /* weight of a sort for tx, avoid endless transmit cleanup */
 256                 if (total_tx_packets >= tx_ring->work_limit)
 257                         break;
 258         }
 259
 260         tx_ring->next_to_clean = i;
 261
 262 #define TX_WAKE_THRESHOLD (DESC_NEEDED * 2)
 263         if (total_tx_packets && netif_carrier_ok(netdev) &&
 264             (IXGBE_DESC_UNUSED(tx_ring) >= TX_WAKE_THRESHOLD)) {
 265                 /* Make sure that anybody stopping the queue after this
 266                  * sees the new next_to_clean.
 267                  */
 268                 smp_mb();
 269 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 270                 if (__netif_subqueue_stopped(netdev, tx_ring->queue_index) &&
 271                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 272                         netif_wake_subqueue(netdev, tx_ring->queue_index);
 273                         adapter->restart_queue++;
 274                 }
 275 #else
 276                 if (netif_queue_stopped(netdev) &&
 277                     !test_bit(__IXGBE_DOWN, &adapter->state)) {
 278                         netif_wake_queue(netdev);
 279                         adapter->restart_queue++;
 280                 }
 281 #endif
 282         }
 283
 284         if (adapter->detect_tx_hung)
 285                 if (ixgbe_check_tx_hang(adapter, tx_ring, eop, eop_desc))
 286 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
 287                         netif_stop_subqueue(netdev, tx_ring->queue_index);
 288 #else
 289                         netif_stop_queue(netdev);
 290 #endif
 291
 292         if (total_tx_packets >= tx_ring->work_limit)
 293                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, tx_ring->eims_value);
 294
 295         tx_ring->total_bytes += total_tx_bytes;
 296         tx_ring->total_packets += total_tx_packets;
 297         adapter->net_stats.tx_bytes += total_tx_bytes;
 298         adapter->net_stats.tx_packets += total_tx_packets;
 299         cleaned = total_tx_packets ? true : false;
 300         return cleaned;
 301 }
 302
 303 #ifdef CONFIG_DCA
 304 static void ixgbe_update_rx_dca(struct ixgbe_adapter *adapter,
 305                                 struct ixgbe_ring *rxr)
 306 {
 307         u32 rxctrl;
 308         int cpu = get_cpu();
 309         int q = rxr - adapter->rx_ring;
 310
 311         if (rxr->cpu != cpu) {
 312                 rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q));
 313                 rxctrl &= ~IXGBE_DCA_RXCTRL_CPUID_MASK;
 314                 rxctrl |= dca_get_tag(cpu);
 315                 rxctrl |= IXGBE_DCA_RXCTRL_DESC_DCA_EN;
 316                 rxctrl |= IXGBE_DCA_RXCTRL_HEAD_DCA_EN;
 317                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_RXCTRL(q), rxctrl);
 318                 rxr->cpu = cpu;
 319         }
 320         put_cpu();
 321 }
 322
 323 static void ixgbe_update_tx_dca(struct ixgbe_adapter *adapter,
 324                                 struct ixgbe_ring *txr)
 325 {
 326         u32 txctrl;
 327         int cpu = get_cpu();
 328         int q = txr - adapter->tx_ring;
 329
 330         if (txr->cpu != cpu) {
 331                 txctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q));
 332                 txctrl &= ~IXGBE_DCA_TXCTRL_CPUID_MASK;
 333                 txctrl |= dca_get_tag(cpu);
 334                 txctrl |= IXGBE_DCA_TXCTRL_DESC_DCA_EN;
 335                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_TXCTRL(q), txctrl);
 336                 txr->cpu = cpu;
 337         }
 338         put_cpu();
 339 }
 340
 341 static void ixgbe_setup_dca(struct ixgbe_adapter *adapter)
 342 {
 343         int i;
 344
 345         if (!(adapter->flags & IXGBE_FLAG_DCA_ENABLED))
 346                 return;
 347
 348         for (i = 0; i < adapter->num_tx_queues; i++) {
 349                 adapter->tx_ring[i].cpu = -1;
 350                 ixgbe_update_tx_dca(adapter, &adapter->tx_ring[i]);
 351         }
 352         for (i = 0; i < adapter->num_rx_queues; i++) {
 353                 adapter->rx_ring[i].cpu = -1;
 354                 ixgbe_update_rx_dca(adapter, &adapter->rx_ring[i]);
 355         }
 356 }
 357
 358 static int __ixgbe_notify_dca(struct device *dev, void *data)
 359 {
 360         struct net_device *netdev = dev_get_drvdata(dev);
 361         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 362         unsigned long event = *(unsigned long *)data;
 363
 364         switch (event) {
 365         case DCA_PROVIDER_ADD:
 366                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
 367                 /* Always use CB2 mode, difference is masked
 368                  * in the CB driver. */
 369                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 2);
 370                 if (dca_add_requester(dev) == 0) {
 371                         ixgbe_setup_dca(adapter);
 372                         break;
 373                 }
 374                 /* Fall Through since DCA is disabled. */
 375         case DCA_PROVIDER_REMOVE:
 376                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
 377                         dca_remove_requester(dev);
 378                         adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
 379                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
 380                 }
 381                 break;
 382         }
 383
 384         return 0;
 385 }
 386
 387 #endif /* CONFIG_DCA */
 388 /**
 389  * ixgbe_receive_skb - Send a completed packet up the stack
 390  * @adapter: board private structure
 391  * @skb: packet to send up
 392  * @is_vlan: packet has a VLAN tag
 393  * @tag: VLAN tag from descriptor
 394  **/
 395 static void ixgbe_receive_skb(struct ixgbe_adapter *adapter,
 396                               struct sk_buff *skb, bool is_vlan,
 397                               u16 tag)
 398 {
 399         if (!(adapter->flags & IXGBE_FLAG_IN_NETPOLL)) {
 400                 if (adapter->vlgrp && is_vlan)
 401                         vlan_hwaccel_receive_skb(skb, adapter->vlgrp, tag);
 402                 else
 403                         netif_receive_skb(skb);
 404         } else {
 405
 406                 if (adapter->vlgrp && is_vlan)
 407                         vlan_hwaccel_rx(skb, adapter->vlgrp, tag);
 408                 else
 409                         netif_rx(skb);
 410         }
 411 }
 412
 413 /**
 414  * ixgbe_rx_checksum - indicate in skb if hw indicated a good cksum
 415  * @adapter: address of board private structure
 416  * @status_err: hardware indication of status of receive
 417  * @skb: skb currently being received and modified
 418  **/
 419 static inline void ixgbe_rx_checksum(struct ixgbe_adapter *adapter,
 420                                          u32 status_err,
 421                                          struct sk_buff *skb)
 422 {
 423         skb->ip_summed = CHECKSUM_NONE;
 424
 425         /* Ignore Checksum bit is set, or rx csum disabled */
 426         if ((status_err & IXGBE_RXD_STAT_IXSM) ||
 427             !(adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED))
 428                 return;
 429
 430         /* if IP and error */
 431         if ((status_err & IXGBE_RXD_STAT_IPCS) &&
 432             (status_err & IXGBE_RXDADV_ERR_IPE)) {
 433                 adapter->hw_csum_rx_error++;
 434                 return;
 435         }
 436
 437         if (!(status_err & IXGBE_RXD_STAT_L4CS))
 438                 return;
 439
 440         if (status_err & IXGBE_RXDADV_ERR_TCPE) {
 441                 adapter->hw_csum_rx_error++;
 442                 return;
 443         }
 444
 445         /* It must be a TCP or UDP packet with a valid checksum */
 446         skb->ip_summed = CHECKSUM_UNNECESSARY;
 447         adapter->hw_csum_rx_good++;
 448 }
 449
 450 /**
 451  * ixgbe_alloc_rx_buffers - Replace used receive buffers; packet split
 452  * @adapter: address of board private structure
 453  **/
 454 static void ixgbe_alloc_rx_buffers(struct ixgbe_adapter *adapter,
 455                                        struct ixgbe_ring *rx_ring,
 456                                        int cleaned_count)
 457 {
 458         struct net_device *netdev = adapter->netdev;
 459         struct pci_dev *pdev = adapter->pdev;
 460         union ixgbe_adv_rx_desc *rx_desc;
 461         struct ixgbe_rx_buffer *rx_buffer_info;
 462         struct sk_buff *skb;
 463         unsigned int i;
 464         unsigned int bufsz = adapter->rx_buf_len + NET_IP_ALIGN;
 465
 466         i = rx_ring->next_to_use;
 467         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 468
 469         while (cleaned_count--) {
 470                 rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 471
 472                 if (!rx_buffer_info->page &&
 473                                 (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED)) {
 474                         rx_buffer_info->page = alloc_page(GFP_ATOMIC);
 475                         if (!rx_buffer_info->page) {
 476                                 adapter->alloc_rx_page_failed++;
 477                                 goto no_buffers;
 478                         }
 479                         rx_buffer_info->page_dma =
 480                             pci_map_page(pdev, rx_buffer_info->page,
 481                                          0, PAGE_SIZE, PCI_DMA_FROMDEVICE);
 482                 }
 483
 484                 if (!rx_buffer_info->skb) {
 485                         skb = netdev_alloc_skb(netdev, bufsz);
 486
 487                         if (!skb) {
 488                                 adapter->alloc_rx_buff_failed++;
 489                                 goto no_buffers;
 490                         }
 491
 492                         /*
 493                          * Make buffer alignment 2 beyond a 16 byte boundary
 494                          * this will result in a 16 byte aligned IP header after
 495                          * the 14 byte MAC header is removed
 496                          */
 497                         skb_reserve(skb, NET_IP_ALIGN);
 498
 499                         rx_buffer_info->skb = skb;
 500                         rx_buffer_info->dma = pci_map_single(pdev, skb->data,
 501                                                           bufsz,
 502                                                           PCI_DMA_FROMDEVICE);
 503                 }
 504                 /* Refresh the desc even if buffer_addrs didn't change because
 505                  * each write-back erases this info. */
 506                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 507                         rx_desc->read.pkt_addr =
 508                             cpu_to_le64(rx_buffer_info->page_dma);
 509                         rx_desc->read.hdr_addr =
 510                                         cpu_to_le64(rx_buffer_info->dma);
 511                 } else {
 512                         rx_desc->read.pkt_addr =
 513                                         cpu_to_le64(rx_buffer_info->dma);
 514                 }
 515
 516                 i++;
 517                 if (i == rx_ring->count)
 518                         i = 0;
 519                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
 520         }
 521 no_buffers:
 522         if (rx_ring->next_to_use != i) {
 523                 rx_ring->next_to_use = i;
 524                 if (i-- == 0)
 525                         i = (rx_ring->count - 1);
 526
 527                 /*
 528                  * Force memory writes to complete before letting h/w
 529                  * know there are new descriptors to fetch.  (Only
 530                  * applicable for weak-ordered memory model archs,
 531                  * such as IA-64).
 532                  */
 533                 wmb();
 534                 writel(i, adapter->hw.hw_addr + rx_ring->tail);
 535         }
 536 }
 537
 538 static bool ixgbe_clean_rx_irq(struct ixgbe_adapter *adapter,
 539                                struct ixgbe_ring *rx_ring,
 540                                int *work_done, int work_to_do)
 541 {
 542         struct net_device *netdev = adapter->netdev;
 543         struct pci_dev *pdev = adapter->pdev;
 544         union ixgbe_adv_rx_desc *rx_desc, *next_rxd;
 545         struct ixgbe_rx_buffer *rx_buffer_info, *next_buffer;
 546         struct sk_buff *skb;
 547         unsigned int i;
 548         u32 upper_len, len, staterr;
 549         u16 hdr_info, vlan_tag;
 550         bool is_vlan, cleaned = false;
 551         int cleaned_count = 0;
 552         unsigned int total_rx_bytes = 0, total_rx_packets = 0;
 553
 554         i = rx_ring->next_to_clean;
 555         upper_len = 0;
 556         rx_desc = IXGBE_RX_DESC_ADV(*rx_ring, i);
 557         staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 558         rx_buffer_info = &rx_ring->rx_buffer_info[i];
 559         is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 560         vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 561
 562         while (staterr & IXGBE_RXD_STAT_DD) {
 563                 if (*work_done >= work_to_do)
 564                         break;
 565                 (*work_done)++;
 566
 567                 if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
 568                         hdr_info =
 569                             le16_to_cpu(rx_desc->wb.lower.lo_dword.hdr_info);
 570                         len =
 571                             ((hdr_info & IXGBE_RXDADV_HDRBUFLEN_MASK) >>
 572                              IXGBE_RXDADV_HDRBUFLEN_SHIFT);
 573                         if (hdr_info & IXGBE_RXDADV_SPH)
 574                                 adapter->rx_hdr_split++;
 575                         if (len > IXGBE_RX_HDR_SIZE)
 576                                 len = IXGBE_RX_HDR_SIZE;
 577                         upper_len = le16_to_cpu(rx_desc->wb.upper.length);
 578                 } else
 579                         len = le16_to_cpu(rx_desc->wb.upper.length);
 580
 581                 cleaned = true;
 582                 skb = rx_buffer_info->skb;
 583                 prefetch(skb->data - NET_IP_ALIGN);
 584                 rx_buffer_info->skb = NULL;
 585
 586                 if (len && !skb_shinfo(skb)->nr_frags) {
 587                         pci_unmap_single(pdev, rx_buffer_info->dma,
 588                                          adapter->rx_buf_len + NET_IP_ALIGN,
 589                                          PCI_DMA_FROMDEVICE);
 590                         skb_put(skb, len);
 591                 }
 592
 593                 if (upper_len) {
 594                         pci_unmap_page(pdev, rx_buffer_info->page_dma,
 595                                        PAGE_SIZE, PCI_DMA_FROMDEVICE);
 596                         rx_buffer_info->page_dma = 0;
 597                         skb_fill_page_desc(skb, skb_shinfo(skb)->nr_frags,
 598                                            rx_buffer_info->page, 0, upper_len);
 599                         rx_buffer_info->page = NULL;
 600
 601                         skb->len += upper_len;
 602                         skb->data_len += upper_len;
 603                         skb->truesize += upper_len;
 604                 }
 605
 606                 i++;
 607                 if (i == rx_ring->count)
 608                         i = 0;
 609                 next_buffer = &rx_ring->rx_buffer_info[i];
 610
 611                 next_rxd = IXGBE_RX_DESC_ADV(*rx_ring, i);
 612                 prefetch(next_rxd);
 613
 614                 cleaned_count++;
 615                 if (staterr & IXGBE_RXD_STAT_EOP) {
 616                         rx_ring->stats.packets++;
 617                         rx_ring->stats.bytes += skb->len;
 618                 } else {
 619                         rx_buffer_info->skb = next_buffer->skb;
 620                         rx_buffer_info->dma = next_buffer->dma;
 621                         next_buffer->skb = skb;
 622                         adapter->non_eop_descs++;
 623                         goto next_desc;
 624                 }
 625
 626                 if (staterr & IXGBE_RXDADV_ERR_FRAME_ERR_MASK) {
 627                         dev_kfree_skb_irq(skb);
 628                         goto next_desc;
 629                 }
 630
 631                 ixgbe_rx_checksum(adapter, staterr, skb);
 632
 633                 /* probably a little skewed due to removing CRC */
 634                 total_rx_bytes += skb->len;
 635                 total_rx_packets++;
 636
 637                 skb->protocol = eth_type_trans(skb, netdev);
 638                 ixgbe_receive_skb(adapter, skb, is_vlan, vlan_tag);
 639                 netdev->last_rx = jiffies;
 640
 641 next_desc:
 642                 rx_desc->wb.upper.status_error = 0;
 643
 644                 /* return some buffers to hardware, one at a time is too slow */
 645                 if (cleaned_count >= IXGBE_RX_BUFFER_WRITE) {
 646                         ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 647                         cleaned_count = 0;
 648                 }
 649
 650                 /* use prefetched values */
 651                 rx_desc = next_rxd;
 652                 rx_buffer_info = next_buffer;
 653
 654                 staterr = le32_to_cpu(rx_desc->wb.upper.status_error);
 655                 is_vlan = (staterr & IXGBE_RXD_STAT_VP);
 656                 vlan_tag = le16_to_cpu(rx_desc->wb.upper.vlan);
 657         }
 658
 659         rx_ring->next_to_clean = i;
 660         cleaned_count = IXGBE_DESC_UNUSED(rx_ring);
 661
 662         if (cleaned_count)
 663                 ixgbe_alloc_rx_buffers(adapter, rx_ring, cleaned_count);
 664
 665         adapter->net_stats.rx_bytes += total_rx_bytes;
 666         adapter->net_stats.rx_packets += total_rx_packets;
 667
 668         rx_ring->total_packets += total_rx_packets;
 669         rx_ring->total_bytes += total_rx_bytes;
 670         adapter->net_stats.rx_bytes += total_rx_bytes;
 671         adapter->net_stats.rx_packets += total_rx_packets;
 672
 673         return cleaned;
 674 }
 675
 676 static int ixgbe_clean_rxonly(struct napi_struct *, int);
 677 /**
 678  * ixgbe_configure_msix - Configure MSI-X hardware
 679  * @adapter: board private structure
 680  *
 681  * ixgbe_configure_msix sets up the hardware to properly generate MSI-X
 682  * interrupts.
 683  **/
 684 static void ixgbe_configure_msix(struct ixgbe_adapter *adapter)
 685 {
 686         struct ixgbe_q_vector *q_vector;
 687         int i, j, q_vectors, v_idx, r_idx;
 688         u32 mask;
 689
 690         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
 691
 692         /* Populate the IVAR table and set the ITR values to the
 693          * corresponding register.
 694          */
 695         for (v_idx = 0; v_idx < q_vectors; v_idx++) {
 696                 q_vector = &adapter->q_vector[v_idx];
 697                 /* XXX for_each_bit(...) */
 698                 r_idx = find_first_bit(q_vector->rxr_idx,
 699                                       adapter->num_rx_queues);
 700
 701                 for (i = 0; i < q_vector->rxr_count; i++) {
 702                         j = adapter->rx_ring[r_idx].reg_idx;
 703                         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(j), v_idx);
 704                         r_idx = find_next_bit(q_vector->rxr_idx,
 705                                               adapter->num_rx_queues,
 706                                               r_idx + 1);
 707                 }
 708                 r_idx = find_first_bit(q_vector->txr_idx,
 709                                        adapter->num_tx_queues);
 710
 711                 for (i = 0; i < q_vector->txr_count; i++) {
 712                         j = adapter->tx_ring[r_idx].reg_idx;
 713                         ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(j), v_idx);
 714                         r_idx = find_next_bit(q_vector->txr_idx,
 715                                               adapter->num_tx_queues,
 716                                               r_idx + 1);
 717                 }
 718
 719                 /* if this is a tx only vector use half the irq (tx) rate */
 720                 if (q_vector->txr_count && !q_vector->rxr_count)
 721                         q_vector->eitr = adapter->tx_eitr;
 722                 else
 723                         /* rx only or mixed */
 724                         q_vector->eitr = adapter->rx_eitr;
 725
 726                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx),
 727                                 EITR_INTS_PER_SEC_TO_REG(q_vector->eitr));
 728         }
 729
 730         ixgbe_set_ivar(adapter, IXGBE_IVAR_OTHER_CAUSES_INDEX, v_idx);
 731         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EITR(v_idx), 1950);
 732
 733         /* set up to autoclear timer, lsc, and the vectors */
 734         mask = IXGBE_EIMS_ENABLE_MASK;
 735         mask &= ~IXGBE_EIMS_OTHER;
 736         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIAC, mask);
 737 }
 738
 739 enum latency_range {
 740         lowest_latency = 0,
 741         low_latency = 1,
 742         bulk_latency = 2,
 743         latency_invalid = 255
 744 };
 745
 746 /**
 747  * ixgbe_update_itr - update the dynamic ITR value based on statistics
 748  * @adapter: pointer to adapter
 749  * @eitr: eitr setting (ints per sec) to give last timeslice
 750  * @itr_setting: current throttle rate in ints/second
 751  * @packets: the number of packets during this measurement interval
 752  * @bytes: the number of bytes during this measurement interval
 753  *
 754  *      Stores a new ITR value based on packets and byte
 755  *      counts during the last interrupt.  The advantage of per interrupt
 756  *      computation is faster updates and more accurate ITR for the current
 757  *      traffic pattern.  Constants in this function were computed
 758  *      based on theoretical maximum wire speed and thresholds were set based
 759  *      on testing data as well as attempting to minimize response time
 760  *      while increasing bulk throughput.
 761  *      this functionality is controlled by the InterruptThrottleRate module
 762  *      parameter (see ixgbe_param.c)
 763  **/
 764 static u8 ixgbe_update_itr(struct ixgbe_adapter *adapter,
 765                            u32 eitr, u8 itr_setting,
 766                            int packets, int bytes)
 767 {
 768         unsigned int retval = itr_setting;
 769         u32 timepassed_us;
 770         u64 bytes_perint;
 771
 772         if (packets == 0)
 773                 goto update_itr_done;
 774
 775
 776         /* simple throttlerate management
 777          *    0-20MB/s lowest (100000 ints/s)
 778          *   20-100MB/s low   (20000 ints/s)
 779          *  100-1249MB/s bulk (8000 ints/s)
 780          */
 781         /* what was last interrupt timeslice? */
 782         timepassed_us = 1000000/eitr;
 783         bytes_perint = bytes / timepassed_us; /* bytes/usec */
 784
 785         switch (itr_setting) {
 786         case lowest_latency:
 787                 if (bytes_perint > adapter->eitr_low)
 788                         retval = low_latency;
 789                 break;
 790         case low_latency:
 791                 if (bytes_perint > adapter->eitr_high)
 792                         retval = bulk_latency;
 793                 else if (bytes_perint <= adapter->eitr_low)
 794                         retval = lowest_latency;
 795                 break;
 796         case bulk_latency:
 797                 if (bytes_perint <= adapter->eitr_high)
 798                         retval = low_latency;
 799                 break;
 800         }
 801
 802 update_itr_done:
 803         return retval;
 804 }
 805
 806 static void ixgbe_set_itr_msix(struct ixgbe_q_vector *q_vector)
 807 {
 808         struct ixgbe_adapter *adapter = q_vector->adapter;
 809         struct ixgbe_hw *hw = &adapter->hw;
 810         u32 new_itr;
 811         u8 current_itr, ret_itr;
 812         int i, r_idx, v_idx = ((void *)q_vector - (void *)(adapter->q_vector)) /
 813                               sizeof(struct ixgbe_q_vector);
 814         struct ixgbe_ring *rx_ring, *tx_ring;
 815
 816         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
 817         for (i = 0; i < q_vector->txr_count; i++) {
 818                 tx_ring = &(adapter->tx_ring[r_idx]);
 819                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
 820                                            q_vector->tx_eitr,
 821                                            tx_ring->total_packets,
 822                                            tx_ring->total_bytes);
 823                 /* if the result for this queue would decrease interrupt
 824                  * rate for this vector then use that result */
 825                 q_vector->tx_eitr = ((q_vector->tx_eitr > ret_itr) ?
 826                                     q_vector->tx_eitr - 1 : ret_itr);
 827                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
 828                                       r_idx + 1);
 829         }
 830
 831         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 832         for (i = 0; i < q_vector->rxr_count; i++) {
 833                 rx_ring = &(adapter->rx_ring[r_idx]);
 834                 ret_itr = ixgbe_update_itr(adapter, q_vector->eitr,
 835                                            q_vector->rx_eitr,
 836                                            rx_ring->total_packets,
 837                                            rx_ring->total_bytes);
 838                 /* if the result for this queue would decrease interrupt
 839                  * rate for this vector then use that result */
 840                 q_vector->rx_eitr = ((q_vector->rx_eitr > ret_itr) ?
 841                                     q_vector->rx_eitr - 1 : ret_itr);
 842                 r_idx = find_next_bit(q_vector->rxr_idx, adapter->num_rx_queues,
 843                                       r_idx + 1);
 844         }
 845
 846         current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr);
 847
 848         switch (current_itr) {
 849         /* counts and packets in update_itr are dependent on these numbers */
 850         case lowest_latency:
 851                 new_itr = 100000;
 852                 break;
 853         case low_latency:
 854                 new_itr = 20000; /* aka hwitr = ~200 */
 855                 break;
 856         case bulk_latency:
 857         default:
 858                 new_itr = 8000;
 859                 break;
 860         }
 861
 862         if (new_itr != q_vector->eitr) {
 863                 u32 itr_reg;
 864                 /* do an exponential smoothing */
 865                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
 866                 q_vector->eitr = new_itr;
 867                 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
 868                 /* must write high and low 16 bits to reset counter */
 869                 DPRINTK(TX_ERR, DEBUG, "writing eitr(%d): %08X\n", v_idx,
 870                         itr_reg);
 871                 IXGBE_WRITE_REG(hw, IXGBE_EITR(v_idx), itr_reg | (itr_reg)<<16);
 872         }
 873
 874         return;
 875 }
 876
 877 static irqreturn_t ixgbe_msix_lsc(int irq, void *data)
 878 {
 879         struct net_device *netdev = data;
 880         struct ixgbe_adapter *adapter = netdev_priv(netdev);
 881         struct ixgbe_hw *hw = &adapter->hw;
 882         u32 eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
 883
 884         if (eicr & IXGBE_EICR_LSC) {
 885                 adapter->lsc_int++;
 886                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 887                         mod_timer(&adapter->watchdog_timer, jiffies);
 888         }
 889
 890         if (!test_bit(__IXGBE_DOWN, &adapter->state))
 891                 IXGBE_WRITE_REG(hw, IXGBE_EIMS, IXGBE_EIMS_OTHER);
 892
 893         return IRQ_HANDLED;
 894 }
 895
 896 static irqreturn_t ixgbe_msix_clean_tx(int irq, void *data)
 897 {
 898         struct ixgbe_q_vector *q_vector = data;
 899         struct ixgbe_adapter  *adapter = q_vector->adapter;
 900         struct ixgbe_ring     *txr;
 901         int i, r_idx;
 902
 903         if (!q_vector->txr_count)
 904                 return IRQ_HANDLED;
 905
 906         r_idx = find_first_bit(q_vector->txr_idx, adapter->num_tx_queues);
 907         for (i = 0; i < q_vector->txr_count; i++) {
 908                 txr = &(adapter->tx_ring[r_idx]);
 909 #ifdef CONFIG_DCA
 910                 if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 911                         ixgbe_update_tx_dca(adapter, txr);
 912 #endif
 913                 txr->total_bytes = 0;
 914                 txr->total_packets = 0;
 915                 ixgbe_clean_tx_irq(adapter, txr);
 916                 r_idx = find_next_bit(q_vector->txr_idx, adapter->num_tx_queues,
 917                                       r_idx + 1);
 918         }
 919
 920         return IRQ_HANDLED;
 921 }
 922
 923 /**
 924  * ixgbe_msix_clean_rx - single unshared vector rx clean (all queues)
 925  * @irq: unused
 926  * @data: pointer to our q_vector struct for this interrupt vector
 927  **/
 928 static irqreturn_t ixgbe_msix_clean_rx(int irq, void *data)
 929 {
 930         struct ixgbe_q_vector *q_vector = data;
 931         struct ixgbe_adapter  *adapter = q_vector->adapter;
 932         struct ixgbe_ring  *rxr;
 933         int r_idx;
 934
 935         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 936         if (!q_vector->rxr_count)
 937                 return IRQ_HANDLED;
 938
 939         rxr = &(adapter->rx_ring[r_idx]);
 940         /* disable interrupts on this vector only */
 941         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, rxr->v_idx);
 942         rxr->total_bytes = 0;
 943         rxr->total_packets = 0;
 944         netif_rx_schedule(adapter->netdev, &q_vector->napi);
 945
 946         return IRQ_HANDLED;
 947 }
 948
 949 static irqreturn_t ixgbe_msix_clean_many(int irq, void *data)
 950 {
 951         ixgbe_msix_clean_rx(irq, data);
 952         ixgbe_msix_clean_tx(irq, data);
 953
 954         return IRQ_HANDLED;
 955 }
 956
 957 /**
 958  * ixgbe_clean_rxonly - msix (aka one shot) rx clean routine
 959  * @napi: napi struct with our devices info in it
 960  * @budget: amount of work driver is allowed to do this pass, in packets
 961  *
 962  **/
 963 static int ixgbe_clean_rxonly(struct napi_struct *napi, int budget)
 964 {
 965         struct ixgbe_q_vector *q_vector =
 966                                container_of(napi, struct ixgbe_q_vector, napi);
 967         struct ixgbe_adapter *adapter = q_vector->adapter;
 968         struct ixgbe_ring *rxr;
 969         int work_done = 0;
 970         long r_idx;
 971
 972         r_idx = find_first_bit(q_vector->rxr_idx, adapter->num_rx_queues);
 973         rxr = &(adapter->rx_ring[r_idx]);
 974 #ifdef CONFIG_DCA
 975         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED)
 976                 ixgbe_update_rx_dca(adapter, rxr);
 977 #endif
 978
 979         ixgbe_clean_rx_irq(adapter, rxr, &work_done, budget);
 980
 981         /* If all Rx work done, exit the polling mode */
 982         if (work_done < budget) {
 983                 netif_rx_complete(adapter->netdev, napi);
 984                 if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS)
 985                         ixgbe_set_itr_msix(q_vector);
 986                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
 987                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, rxr->v_idx);
 988         }
 989
 990         return work_done;
 991 }
 992
 993 static inline void map_vector_to_rxq(struct ixgbe_adapter *a, int v_idx,
 994                                      int r_idx)
 995 {
 996         a->q_vector[v_idx].adapter = a;
 997         set_bit(r_idx, a->q_vector[v_idx].rxr_idx);
 998         a->q_vector[v_idx].rxr_count++;
 999         a->rx_ring[r_idx].v_idx = 1 << v_idx;
1000 }
1001
1002 static inline void map_vector_to_txq(struct ixgbe_adapter *a, int v_idx,
1003                                      int r_idx)
1004 {
1005         a->q_vector[v_idx].adapter = a;
1006         set_bit(r_idx, a->q_vector[v_idx].txr_idx);
1007         a->q_vector[v_idx].txr_count++;
1008         a->tx_ring[r_idx].v_idx = 1 << v_idx;
1009 }
1010
1011 /**
1012  * ixgbe_map_rings_to_vectors - Maps descriptor rings to vectors
1013  * @adapter: board private structure to initialize
1014  * @vectors: allotted vector count for descriptor rings
1015  *
1016  * This function maps descriptor rings to the queue-specific vectors
1017  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
1018  * one vector per ring/queue, but on a constrained vector budget, we
1019  * group the rings as "efficiently" as possible.  You would add new
1020  * mapping configurations in here.
1021  **/
1022 static int ixgbe_map_rings_to_vectors(struct ixgbe_adapter *adapter,
1023                                       int vectors)
1024 {
1025         int v_start = 0;
1026         int rxr_idx = 0, txr_idx = 0;
1027         int rxr_remaining = adapter->num_rx_queues;
1028         int txr_remaining = adapter->num_tx_queues;
1029         int i, j;
1030         int rqpv, tqpv;
1031         int err = 0;
1032
1033         /* No mapping required if MSI-X is disabled. */
1034         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1035                 goto out;
1036
1037         /*
1038          * The ideal configuration...
1039          * We have enough vectors to map one per queue.
1040          */
1041         if (vectors == adapter->num_rx_queues + adapter->num_tx_queues) {
1042                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
1043                         map_vector_to_rxq(adapter, v_start, rxr_idx);
1044
1045                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
1046                         map_vector_to_txq(adapter, v_start, txr_idx);
1047
1048                 goto out;
1049         }
1050
1051         /*
1052          * If we don't have enough vectors for a 1-to-1
1053          * mapping, we'll have to group them so there are
1054          * multiple queues per vector.
1055          */
1056         /* Re-adjusting *qpv takes care of the remainder. */
1057         for (i = v_start; i < vectors; i++) {
1058                 rqpv = DIV_ROUND_UP(rxr_remaining, vectors - i);
1059                 for (j = 0; j < rqpv; j++) {
1060                         map_vector_to_rxq(adapter, i, rxr_idx);
1061                         rxr_idx++;
1062                         rxr_remaining--;
1063                 }
1064         }
1065         for (i = v_start; i < vectors; i++) {
1066                 tqpv = DIV_ROUND_UP(txr_remaining, vectors - i);
1067                 for (j = 0; j < tqpv; j++) {
1068                         map_vector_to_txq(adapter, i, txr_idx);
1069                         txr_idx++;
1070                         txr_remaining--;
1071                 }
1072         }
1073
1074 out:
1075         return err;
1076 }
1077
1078 /**
1079  * ixgbe_request_msix_irqs - Initialize MSI-X interrupts
1080  * @adapter: board private structure
1081  *
1082  * ixgbe_request_msix_irqs allocates MSI-X vectors and requests
1083  * interrupts from the kernel.
1084  **/
1085 static int ixgbe_request_msix_irqs(struct ixgbe_adapter *adapter)
1086 {
1087         struct net_device *netdev = adapter->netdev;
1088         irqreturn_t (*handler)(int, void *);
1089         int i, vector, q_vectors, err;
1090
1091         /* Decrement for Other and TCP Timer vectors */
1092         q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1093
1094         /* Map the Tx/Rx rings to the vectors we were allotted. */
1095         err = ixgbe_map_rings_to_vectors(adapter, q_vectors);
1096         if (err)
1097                 goto out;
1098
1099 #define SET_HANDLER(_v) ((!(_v)->rxr_count) ? &ixgbe_msix_clean_tx : \
1100                          (!(_v)->txr_count) ? &ixgbe_msix_clean_rx : \
1101                          &ixgbe_msix_clean_many)
1102         for (vector = 0; vector < q_vectors; vector++) {
1103                 handler = SET_HANDLER(&adapter->q_vector[vector]);
1104                 sprintf(adapter->name[vector], "%s:v%d-%s",
1105                         netdev->name, vector,
1106                         (handler == &ixgbe_msix_clean_rx) ? "Rx" :
1107                          ((handler == &ixgbe_msix_clean_tx) ? "Tx" : "TxRx"));
1108                 err = request_irq(adapter->msix_entries[vector].vector,
1109                                   handler, 0, adapter->name[vector],
1110                                   &(adapter->q_vector[vector]));
1111                 if (err) {
1112                         DPRINTK(PROBE, ERR,
1113                                 "request_irq failed for MSIX interrupt "
1114                                 "Error: %d\n", err);
1115                         goto free_queue_irqs;
1116                 }
1117         }
1118
1119         sprintf(adapter->name[vector], "%s:lsc", netdev->name);
1120         err = request_irq(adapter->msix_entries[vector].vector,
1121                           &ixgbe_msix_lsc, 0, adapter->name[vector], netdev);
1122         if (err) {
1123                 DPRINTK(PROBE, ERR,
1124                         "request_irq for msix_lsc failed: %d\n", err);
1125                 goto free_queue_irqs;
1126         }
1127
1128         return 0;
1129
1130 free_queue_irqs:
1131         for (i = vector - 1; i >= 0; i--)
1132                 free_irq(adapter->msix_entries[--vector].vector,
1133                          &(adapter->q_vector[i]));
1134         adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
1135         pci_disable_msix(adapter->pdev);
1136         kfree(adapter->msix_entries);
1137         adapter->msix_entries = NULL;
1138 out:
1139         return err;
1140 }
1141
1142 static void ixgbe_set_itr(struct ixgbe_adapter *adapter)
1143 {
1144         struct ixgbe_hw *hw = &adapter->hw;
1145         struct ixgbe_q_vector *q_vector = adapter->q_vector;
1146         u8 current_itr;
1147         u32 new_itr = q_vector->eitr;
1148         struct ixgbe_ring *rx_ring = &adapter->rx_ring[0];
1149         struct ixgbe_ring *tx_ring = &adapter->tx_ring[0];
1150
1151         q_vector->tx_eitr = ixgbe_update_itr(adapter, new_itr,
1152                                              q_vector->tx_eitr,
1153                                              tx_ring->total_packets,
1154                                              tx_ring->total_bytes);
1155         q_vector->rx_eitr = ixgbe_update_itr(adapter, new_itr,
1156                                              q_vector->rx_eitr,
1157                                              rx_ring->total_packets,
1158                                              rx_ring->total_bytes);
1159
1160         current_itr = max(q_vector->rx_eitr, q_vector->tx_eitr);
1161
1162         switch (current_itr) {
1163         /* counts and packets in update_itr are dependent on these numbers */
1164         case lowest_latency:
1165                 new_itr = 100000;
1166                 break;
1167         case low_latency:
1168                 new_itr = 20000; /* aka hwitr = ~200 */
1169                 break;
1170         case bulk_latency:
1171                 new_itr = 8000;
1172                 break;
1173         default:
1174                 break;
1175         }
1176
1177         if (new_itr != q_vector->eitr) {
1178                 u32 itr_reg;
1179                 /* do an exponential smoothing */
1180                 new_itr = ((q_vector->eitr * 90)/100) + ((new_itr * 10)/100);
1181                 q_vector->eitr = new_itr;
1182                 itr_reg = EITR_INTS_PER_SEC_TO_REG(new_itr);
1183                 /* must write high and low 16 bits to reset counter */
1184                 IXGBE_WRITE_REG(hw, IXGBE_EITR(0), itr_reg | (itr_reg)<<16);
1185         }
1186
1187         return;
1188 }
1189
1190 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter);
1191
1192 /**
1193  * ixgbe_intr - legacy mode Interrupt Handler
1194  * @irq: interrupt number
1195  * @data: pointer to a network interface device structure
1196  * @pt_regs: CPU registers structure
1197  **/
1198 static irqreturn_t ixgbe_intr(int irq, void *data)
1199 {
1200         struct net_device *netdev = data;
1201         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1202         struct ixgbe_hw *hw = &adapter->hw;
1203         u32 eicr;
1204
1205
1206         /* for NAPI, using EIAM to auto-mask tx/rx interrupt bits on read
1207          * therefore no explict interrupt disable is necessary */
1208         eicr = IXGBE_READ_REG(hw, IXGBE_EICR);
1209         if (!eicr)
1210                 return IRQ_NONE;        /* Not our interrupt */
1211
1212         if (eicr & IXGBE_EICR_LSC) {
1213                 adapter->lsc_int++;
1214                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
1215                         mod_timer(&adapter->watchdog_timer, jiffies);
1216         }
1217
1218
1219         if (netif_rx_schedule_prep(netdev, &adapter->q_vector[0].napi)) {
1220                 adapter->tx_ring[0].total_packets = 0;
1221                 adapter->tx_ring[0].total_bytes = 0;
1222                 adapter->rx_ring[0].total_packets = 0;
1223                 adapter->rx_ring[0].total_bytes = 0;
1224                 /* would disable interrupts here but EIAM disabled it */
1225                 __netif_rx_schedule(netdev, &adapter->q_vector[0].napi);
1226         }
1227
1228         return IRQ_HANDLED;
1229 }
1230
1231 static inline void ixgbe_reset_q_vectors(struct ixgbe_adapter *adapter)
1232 {
1233         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1234
1235         for (i = 0; i < q_vectors; i++) {
1236                 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
1237                 bitmap_zero(q_vector->rxr_idx, MAX_RX_QUEUES);
1238                 bitmap_zero(q_vector->txr_idx, MAX_TX_QUEUES);
1239                 q_vector->rxr_count = 0;
1240                 q_vector->txr_count = 0;
1241         }
1242 }
1243
1244 /**
1245  * ixgbe_request_irq - initialize interrupts
1246  * @adapter: board private structure
1247  *
1248  * Attempts to configure interrupts using the best available
1249  * capabilities of the hardware and kernel.
1250  **/
1251 static int ixgbe_request_irq(struct ixgbe_adapter *adapter)
1252 {
1253         struct net_device *netdev = adapter->netdev;
1254         int err;
1255
1256         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1257                 err = ixgbe_request_msix_irqs(adapter);
1258         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
1259                 err = request_irq(adapter->pdev->irq, &ixgbe_intr, 0,
1260                                   netdev->name, netdev);
1261         } else {
1262                 err = request_irq(adapter->pdev->irq, &ixgbe_intr, IRQF_SHARED,
1263                                   netdev->name, netdev);
1264         }
1265
1266         if (err)
1267                 DPRINTK(PROBE, ERR, "request_irq failed, Error %d\n", err);
1268
1269         return err;
1270 }
1271
1272 static void ixgbe_free_irq(struct ixgbe_adapter *adapter)
1273 {
1274         struct net_device *netdev = adapter->netdev;
1275
1276         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1277                 int i, q_vectors;
1278
1279                 q_vectors = adapter->num_msix_vectors;
1280
1281                 i = q_vectors - 1;
1282                 free_irq(adapter->msix_entries[i].vector, netdev);
1283
1284                 i--;
1285                 for (; i >= 0; i--) {
1286                         free_irq(adapter->msix_entries[i].vector,
1287                                  &(adapter->q_vector[i]));
1288                 }
1289
1290                 ixgbe_reset_q_vectors(adapter);
1291         } else {
1292                 free_irq(adapter->pdev->irq, netdev);
1293         }
1294 }
1295
1296 /**
1297  * ixgbe_irq_disable - Mask off interrupt generation on the NIC
1298  * @adapter: board private structure
1299  **/
1300 static inline void ixgbe_irq_disable(struct ixgbe_adapter *adapter)
1301 {
1302         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMC, ~0);
1303         IXGBE_WRITE_FLUSH(&adapter->hw);
1304         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1305                 int i;
1306                 for (i = 0; i < adapter->num_msix_vectors; i++)
1307                         synchronize_irq(adapter->msix_entries[i].vector);
1308         } else {
1309                 synchronize_irq(adapter->pdev->irq);
1310         }
1311 }
1312
1313 /**
1314  * ixgbe_irq_enable - Enable default interrupt generation settings
1315  * @adapter: board private structure
1316  **/
1317 static inline void ixgbe_irq_enable(struct ixgbe_adapter *adapter)
1318 {
1319         u32 mask;
1320         mask = IXGBE_EIMS_ENABLE_MASK;
1321         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EIMS, mask);
1322         IXGBE_WRITE_FLUSH(&adapter->hw);
1323 }
1324
1325 /**
1326  * ixgbe_configure_msi_and_legacy - Initialize PIN (INTA...) and MSI interrupts
1327  *
1328  **/
1329 static void ixgbe_configure_msi_and_legacy(struct ixgbe_adapter *adapter)
1330 {
1331         struct ixgbe_hw *hw = &adapter->hw;
1332
1333         IXGBE_WRITE_REG(hw, IXGBE_EITR(0),
1334                         EITR_INTS_PER_SEC_TO_REG(adapter->rx_eitr));
1335
1336         ixgbe_set_ivar(adapter, IXGBE_IVAR_RX_QUEUE(0), 0);
1337         ixgbe_set_ivar(adapter, IXGBE_IVAR_TX_QUEUE(0), 0);
1338
1339         map_vector_to_rxq(adapter, 0, 0);
1340         map_vector_to_txq(adapter, 0, 0);
1341
1342         DPRINTK(HW, INFO, "Legacy interrupt IVAR setup done\n");
1343 }
1344
1345 /**
1346  * ixgbe_configure_tx - Configure 8254x Transmit Unit after Reset
1347  * @adapter: board private structure
1348  *
1349  * Configure the Tx unit of the MAC after a reset.
1350  **/
1351 static void ixgbe_configure_tx(struct ixgbe_adapter *adapter)
1352 {
1353         u64 tdba;
1354         struct ixgbe_hw *hw = &adapter->hw;
1355         u32 i, j, tdlen, txctrl;
1356
1357         /* Setup the HW Tx Head and Tail descriptor pointers */
1358         for (i = 0; i < adapter->num_tx_queues; i++) {
1359                 j = adapter->tx_ring[i].reg_idx;
1360                 tdba = adapter->tx_ring[i].dma;
1361                 tdlen = adapter->tx_ring[i].count *
1362                         sizeof(union ixgbe_adv_tx_desc);
1363                 IXGBE_WRITE_REG(hw, IXGBE_TDBAL(j),
1364                                 (tdba & DMA_32BIT_MASK));
1365                 IXGBE_WRITE_REG(hw, IXGBE_TDBAH(j), (tdba >> 32));
1366                 IXGBE_WRITE_REG(hw, IXGBE_TDLEN(j), tdlen);
1367                 IXGBE_WRITE_REG(hw, IXGBE_TDH(j), 0);
1368                 IXGBE_WRITE_REG(hw, IXGBE_TDT(j), 0);
1369                 adapter->tx_ring[i].head = IXGBE_TDH(j);
1370                 adapter->tx_ring[i].tail = IXGBE_TDT(j);
1371                 /* Disable Tx Head Writeback RO bit, since this hoses
1372                  * bookkeeping if things aren't delivered in order.
1373                  */
1374                 txctrl = IXGBE_READ_REG(hw, IXGBE_DCA_TXCTRL(i));
1375                 txctrl &= ~IXGBE_DCA_TXCTRL_TX_WB_RO_EN;
1376                 IXGBE_WRITE_REG(hw, IXGBE_DCA_TXCTRL(i), txctrl);
1377         }
1378 }
1379
1380 #define PAGE_USE_COUNT(S) (((S) >> PAGE_SHIFT) + \
1381                         (((S) & (PAGE_SIZE - 1)) ? 1 : 0))
1382
1383 #define IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT                 2
1384 /**
1385  * ixgbe_configure_rx - Configure 8254x Receive Unit after Reset
1386  * @adapter: board private structure
1387  *
1388  * Configure the Rx unit of the MAC after a reset.
1389  **/
1390 static void ixgbe_configure_rx(struct ixgbe_adapter *adapter)
1391 {
1392         u64 rdba;
1393         struct ixgbe_hw *hw = &adapter->hw;
1394         struct net_device *netdev = adapter->netdev;
1395         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1396         int i, j;
1397         u32 rdlen, rxctrl, rxcsum;
1398         u32 random[10];
1399         u32 fctrl, hlreg0;
1400         u32 pages;
1401         u32 reta = 0, mrqc, srrctl;
1402
1403         /* Decide whether to use packet split mode or not */
1404         if (netdev->mtu > ETH_DATA_LEN)
1405                 adapter->flags |= IXGBE_FLAG_RX_PS_ENABLED;
1406         else
1407                 adapter->flags &= ~IXGBE_FLAG_RX_PS_ENABLED;
1408
1409         /* Set the RX buffer length according to the mode */
1410         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1411                 adapter->rx_buf_len = IXGBE_RX_HDR_SIZE;
1412         } else {
1413                 if (netdev->mtu <= ETH_DATA_LEN)
1414                         adapter->rx_buf_len = MAXIMUM_ETHERNET_VLAN_SIZE;
1415                 else
1416                         adapter->rx_buf_len = ALIGN(max_frame, 1024);
1417         }
1418
1419         fctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
1420         fctrl |= IXGBE_FCTRL_BAM;
1421         fctrl |= IXGBE_FCTRL_DPF; /* discard pause frames when FC enabled */
1422         IXGBE_WRITE_REG(&adapter->hw, IXGBE_FCTRL, fctrl);
1423
1424         hlreg0 = IXGBE_READ_REG(hw, IXGBE_HLREG0);
1425         if (adapter->netdev->mtu <= ETH_DATA_LEN)
1426                 hlreg0 &= ~IXGBE_HLREG0_JUMBOEN;
1427         else
1428                 hlreg0 |= IXGBE_HLREG0_JUMBOEN;
1429         IXGBE_WRITE_REG(hw, IXGBE_HLREG0, hlreg0);
1430
1431         pages = PAGE_USE_COUNT(adapter->netdev->mtu);
1432
1433         srrctl = IXGBE_READ_REG(&adapter->hw, IXGBE_SRRCTL(0));
1434         srrctl &= ~IXGBE_SRRCTL_BSIZEHDR_MASK;
1435         srrctl &= ~IXGBE_SRRCTL_BSIZEPKT_MASK;
1436
1437         if (adapter->flags & IXGBE_FLAG_RX_PS_ENABLED) {
1438                 srrctl |= PAGE_SIZE >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1439                 srrctl |= IXGBE_SRRCTL_DESCTYPE_HDR_SPLIT_ALWAYS;
1440                 srrctl |= ((IXGBE_RX_HDR_SIZE <<
1441                             IXGBE_SRRCTL_BSIZEHDRSIZE_SHIFT) &
1442                            IXGBE_SRRCTL_BSIZEHDR_MASK);
1443         } else {
1444                 srrctl |= IXGBE_SRRCTL_DESCTYPE_ADV_ONEBUF;
1445
1446                 if (adapter->rx_buf_len == MAXIMUM_ETHERNET_VLAN_SIZE)
1447                         srrctl |=
1448                              IXGBE_RXBUFFER_2048 >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1449                 else
1450                         srrctl |=
1451                              adapter->rx_buf_len >> IXGBE_SRRCTL_BSIZEPKT_SHIFT;
1452         }
1453         IXGBE_WRITE_REG(&adapter->hw, IXGBE_SRRCTL(0), srrctl);
1454
1455         rdlen = adapter->rx_ring[0].count * sizeof(union ixgbe_adv_rx_desc);
1456         /* disable receives while setting up the descriptors */
1457         rxctrl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1458         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxctrl & ~IXGBE_RXCTRL_RXEN);
1459
1460         /* Setup the HW Rx Head and Tail Descriptor Pointers and
1461          * the Base and Length of the Rx Descriptor Ring */
1462         for (i = 0; i < adapter->num_rx_queues; i++) {
1463                 rdba = adapter->rx_ring[i].dma;
1464                 IXGBE_WRITE_REG(hw, IXGBE_RDBAL(i), (rdba & DMA_32BIT_MASK));
1465                 IXGBE_WRITE_REG(hw, IXGBE_RDBAH(i), (rdba >> 32));
1466                 IXGBE_WRITE_REG(hw, IXGBE_RDLEN(i), rdlen);
1467                 IXGBE_WRITE_REG(hw, IXGBE_RDH(i), 0);
1468                 IXGBE_WRITE_REG(hw, IXGBE_RDT(i), 0);
1469                 adapter->rx_ring[i].head = IXGBE_RDH(i);
1470                 adapter->rx_ring[i].tail = IXGBE_RDT(i);
1471         }
1472
1473         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED) {
1474                 /* Fill out redirection table */
1475                 for (i = 0, j = 0; i < 128; i++, j++) {
1476                         if (j == adapter->ring_feature[RING_F_RSS].indices)
1477                                 j = 0;
1478                         /* reta = 4-byte sliding window of
1479                          * 0x00..(indices-1)(indices-1)00..etc. */
1480                         reta = (reta << 8) | (j * 0x11);
1481                         if ((i & 3) == 3)
1482                                 IXGBE_WRITE_REG(hw, IXGBE_RETA(i >> 2), reta);
1483                 }
1484
1485                 /* Fill out hash function seeds */
1486                 /* XXX use a random constant here to glue certain flows */
1487                 get_random_bytes(&random[0], 40);
1488                 for (i = 0; i < 10; i++)
1489                         IXGBE_WRITE_REG(hw, IXGBE_RSSRK(i), random[i]);
1490
1491                 mrqc = IXGBE_MRQC_RSSEN
1492                     /* Perform hash on these packet types */
1493                     | IXGBE_MRQC_RSS_FIELD_IPV4
1494                     | IXGBE_MRQC_RSS_FIELD_IPV4_TCP
1495                     | IXGBE_MRQC_RSS_FIELD_IPV4_UDP
1496                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_TCP
1497                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX
1498                     | IXGBE_MRQC_RSS_FIELD_IPV6
1499                     | IXGBE_MRQC_RSS_FIELD_IPV6_TCP
1500                     | IXGBE_MRQC_RSS_FIELD_IPV6_UDP
1501                     | IXGBE_MRQC_RSS_FIELD_IPV6_EX_UDP;
1502                 IXGBE_WRITE_REG(hw, IXGBE_MRQC, mrqc);
1503         }
1504
1505         rxcsum = IXGBE_READ_REG(hw, IXGBE_RXCSUM);
1506
1507         if (adapter->flags & IXGBE_FLAG_RSS_ENABLED ||
1508             adapter->flags & IXGBE_FLAG_RX_CSUM_ENABLED) {
1509                 /* Disable indicating checksum in descriptor, enables
1510                  * RSS hash */
1511                 rxcsum |= IXGBE_RXCSUM_PCSD;
1512         }
1513         if (!(rxcsum & IXGBE_RXCSUM_PCSD)) {
1514                 /* Enable IPv4 payload checksum for UDP fragments
1515                  * if PCSD is not set */
1516                 rxcsum |= IXGBE_RXCSUM_IPPCSE;
1517         }
1518
1519         IXGBE_WRITE_REG(hw, IXGBE_RXCSUM, rxcsum);
1520 }
1521
1522 static void ixgbe_vlan_rx_register(struct net_device *netdev,
1523                                    struct vlan_group *grp)
1524 {
1525         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1526         u32 ctrl;
1527
1528         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1529                 ixgbe_irq_disable(adapter);
1530         adapter->vlgrp = grp;
1531
1532         if (grp) {
1533                 /* enable VLAN tag insert/strip */
1534                 ctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_VLNCTRL);
1535                 ctrl |= IXGBE_VLNCTRL_VME | IXGBE_VLNCTRL_VFE;
1536                 ctrl &= ~IXGBE_VLNCTRL_CFIEN;
1537                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_VLNCTRL, ctrl);
1538         }
1539
1540         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1541                 ixgbe_irq_enable(adapter);
1542 }
1543
1544 static void ixgbe_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
1545 {
1546         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1547
1548         /* add VID to filter table */
1549         ixgbe_set_vfta(&adapter->hw, vid, 0, true);
1550 }
1551
1552 static void ixgbe_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
1553 {
1554         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1555
1556         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1557                 ixgbe_irq_disable(adapter);
1558
1559         vlan_group_set_device(adapter->vlgrp, vid, NULL);
1560
1561         if (!test_bit(__IXGBE_DOWN, &adapter->state))
1562                 ixgbe_irq_enable(adapter);
1563
1564         /* remove VID from filter table */
1565         ixgbe_set_vfta(&adapter->hw, vid, 0, false);
1566 }
1567
1568 static void ixgbe_restore_vlan(struct ixgbe_adapter *adapter)
1569 {
1570         ixgbe_vlan_rx_register(adapter->netdev, adapter->vlgrp);
1571
1572         if (adapter->vlgrp) {
1573                 u16 vid;
1574                 for (vid = 0; vid < VLAN_GROUP_ARRAY_LEN; vid++) {
1575                         if (!vlan_group_get_device(adapter->vlgrp, vid))
1576                                 continue;
1577                         ixgbe_vlan_rx_add_vid(adapter->netdev, vid);
1578                 }
1579         }
1580 }
1581
1582 /**
1583  * ixgbe_set_multi - Multicast and Promiscuous mode set
1584  * @netdev: network interface device structure
1585  *
1586  * The set_multi entry point is called whenever the multicast address
1587  * list or the network interface flags are updated.  This routine is
1588  * responsible for configuring the hardware for proper multicast,
1589  * promiscuous mode, and all-multi behavior.
1590  **/
1591 static void ixgbe_set_multi(struct net_device *netdev)
1592 {
1593         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1594         struct ixgbe_hw *hw = &adapter->hw;
1595         struct dev_mc_list *mc_ptr;
1596         u8 *mta_list;
1597         u32 fctrl;
1598         int i;
1599
1600         /* Check for Promiscuous and All Multicast modes */
1601
1602         fctrl = IXGBE_READ_REG(hw, IXGBE_FCTRL);
1603
1604         if (netdev->flags & IFF_PROMISC) {
1605                 fctrl |= (IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1606         } else if (netdev->flags & IFF_ALLMULTI) {
1607                 fctrl |= IXGBE_FCTRL_MPE;
1608                 fctrl &= ~IXGBE_FCTRL_UPE;
1609         } else {
1610                 fctrl &= ~(IXGBE_FCTRL_UPE | IXGBE_FCTRL_MPE);
1611         }
1612
1613         IXGBE_WRITE_REG(hw, IXGBE_FCTRL, fctrl);
1614
1615         if (netdev->mc_count) {
1616                 mta_list = kcalloc(netdev->mc_count, ETH_ALEN, GFP_ATOMIC);
1617                 if (!mta_list)
1618                         return;
1619
1620                 /* Shared function expects packed array of only addresses. */
1621                 mc_ptr = netdev->mc_list;
1622
1623                 for (i = 0; i < netdev->mc_count; i++) {
1624                         if (!mc_ptr)
1625                                 break;
1626                         memcpy(mta_list + (i * ETH_ALEN), mc_ptr->dmi_addr,
1627                                ETH_ALEN);
1628                         mc_ptr = mc_ptr->next;
1629                 }
1630
1631                 ixgbe_update_mc_addr_list(hw, mta_list, i, 0);
1632                 kfree(mta_list);
1633         } else {
1634                 ixgbe_update_mc_addr_list(hw, NULL, 0, 0);
1635         }
1636
1637 }
1638
1639 static void ixgbe_napi_enable_all(struct ixgbe_adapter *adapter)
1640 {
1641         int q_idx;
1642         struct ixgbe_q_vector *q_vector;
1643         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1644
1645         /* legacy and MSI only use one vector */
1646         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1647                 q_vectors = 1;
1648
1649         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1650                 q_vector = &adapter->q_vector[q_idx];
1651                 if (!q_vector->rxr_count)
1652                         continue;
1653                 napi_enable(&q_vector->napi);
1654         }
1655 }
1656
1657 static void ixgbe_napi_disable_all(struct ixgbe_adapter *adapter)
1658 {
1659         int q_idx;
1660         struct ixgbe_q_vector *q_vector;
1661         int q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
1662
1663         /* legacy and MSI only use one vector */
1664         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED))
1665                 q_vectors = 1;
1666
1667         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
1668                 q_vector = &adapter->q_vector[q_idx];
1669                 if (!q_vector->rxr_count)
1670                         continue;
1671                 napi_disable(&q_vector->napi);
1672         }
1673 }
1674
1675 static void ixgbe_configure(struct ixgbe_adapter *adapter)
1676 {
1677         struct net_device *netdev = adapter->netdev;
1678         int i;
1679
1680         ixgbe_set_multi(netdev);
1681
1682         ixgbe_restore_vlan(adapter);
1683
1684         ixgbe_configure_tx(adapter);
1685         ixgbe_configure_rx(adapter);
1686         for (i = 0; i < adapter->num_rx_queues; i++)
1687                 ixgbe_alloc_rx_buffers(adapter, &adapter->rx_ring[i],
1688                                            (adapter->rx_ring[i].count - 1));
1689 }
1690
1691 static int ixgbe_up_complete(struct ixgbe_adapter *adapter)
1692 {
1693         struct net_device *netdev = adapter->netdev;
1694         struct ixgbe_hw *hw = &adapter->hw;
1695         int i, j = 0;
1696         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
1697         u32 txdctl, rxdctl, mhadd;
1698         u32 gpie;
1699
1700         ixgbe_get_hw_control(adapter);
1701
1702         if ((adapter->flags & IXGBE_FLAG_MSIX_ENABLED) ||
1703             (adapter->flags & IXGBE_FLAG_MSI_ENABLED)) {
1704                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
1705                         gpie = (IXGBE_GPIE_MSIX_MODE | IXGBE_GPIE_EIAME |
1706                                 IXGBE_GPIE_PBA_SUPPORT | IXGBE_GPIE_OCD);
1707                 } else {
1708                         /* MSI only */
1709                         gpie = 0;
1710                 }
1711                 /* XXX: to interrupt immediately for EICS writes, enable this */
1712                 /* gpie |= IXGBE_GPIE_EIMEN; */
1713                 IXGBE_WRITE_REG(hw, IXGBE_GPIE, gpie);
1714         }
1715
1716         if (!(adapter->flags & IXGBE_FLAG_MSIX_ENABLED)) {
1717                 /* legacy interrupts, use EIAM to auto-mask when reading EICR,
1718                  * specifically only auto mask tx and rx interrupts */
1719                 IXGBE_WRITE_REG(hw, IXGBE_EIAM, IXGBE_EICS_RTX_QUEUE);
1720         }
1721
1722         mhadd = IXGBE_READ_REG(hw, IXGBE_MHADD);
1723         if (max_frame != (mhadd >> IXGBE_MHADD_MFS_SHIFT)) {
1724                 mhadd &= ~IXGBE_MHADD_MFS_MASK;
1725                 mhadd |= max_frame << IXGBE_MHADD_MFS_SHIFT;
1726
1727                 IXGBE_WRITE_REG(hw, IXGBE_MHADD, mhadd);
1728         }
1729
1730         for (i = 0; i < adapter->num_tx_queues; i++) {
1731                 j = adapter->tx_ring[i].reg_idx;
1732                 txdctl = IXGBE_READ_REG(hw, IXGBE_TXDCTL(j));
1733                 txdctl |= IXGBE_TXDCTL_ENABLE;
1734                 IXGBE_WRITE_REG(hw, IXGBE_TXDCTL(j), txdctl);
1735         }
1736
1737         for (i = 0; i < adapter->num_rx_queues; i++) {
1738                 j = adapter->rx_ring[i].reg_idx;
1739                 rxdctl = IXGBE_READ_REG(hw, IXGBE_RXDCTL(j));
1740                 /* enable PTHRESH=32 descriptors (half the internal cache)
1741                  * and HTHRESH=0 descriptors (to minimize latency on fetch),
1742                  * this also removes a pesky rx_no_buffer_count increment */
1743                 rxdctl |= 0x0020;
1744                 rxdctl |= IXGBE_RXDCTL_ENABLE;
1745                 IXGBE_WRITE_REG(hw, IXGBE_RXDCTL(j), rxdctl);
1746         }
1747         /* enable all receives */
1748         rxdctl = IXGBE_READ_REG(hw, IXGBE_RXCTRL);
1749         rxdctl |= (IXGBE_RXCTRL_DMBYPS | IXGBE_RXCTRL_RXEN);
1750         IXGBE_WRITE_REG(hw, IXGBE_RXCTRL, rxdctl);
1751
1752         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
1753                 ixgbe_configure_msix(adapter);
1754         else
1755                 ixgbe_configure_msi_and_legacy(adapter);
1756
1757         clear_bit(__IXGBE_DOWN, &adapter->state);
1758         ixgbe_napi_enable_all(adapter);
1759
1760         /* clear any pending interrupts, may auto mask */
1761         IXGBE_READ_REG(hw, IXGBE_EICR);
1762
1763         ixgbe_irq_enable(adapter);
1764
1765         /* bring the link up in the watchdog, this could race with our first
1766          * link up interrupt but shouldn't be a problem */
1767         mod_timer(&adapter->watchdog_timer, jiffies);
1768         return 0;
1769 }
1770
1771 void ixgbe_reinit_locked(struct ixgbe_adapter *adapter)
1772 {
1773         WARN_ON(in_interrupt());
1774         while (test_and_set_bit(__IXGBE_RESETTING, &adapter->state))
1775                 msleep(1);
1776         ixgbe_down(adapter);
1777         ixgbe_up(adapter);
1778         clear_bit(__IXGBE_RESETTING, &adapter->state);
1779 }
1780
1781 int ixgbe_up(struct ixgbe_adapter *adapter)
1782 {
1783         /* hardware has been reset, we need to reload some things */
1784         ixgbe_configure(adapter);
1785
1786         return ixgbe_up_complete(adapter);
1787 }
1788
1789 void ixgbe_reset(struct ixgbe_adapter *adapter)
1790 {
1791         if (ixgbe_init_hw(&adapter->hw))
1792                 DPRINTK(PROBE, ERR, "Hardware Error\n");
1793
1794         /* reprogram the RAR[0] in case user changed it. */
1795         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
1796
1797 }
1798
1799 #ifdef CONFIG_PM
1800 static int ixgbe_resume(struct pci_dev *pdev)
1801 {
1802         struct net_device *netdev = pci_get_drvdata(pdev);
1803         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1804         u32 err;
1805
1806         pci_set_power_state(pdev, PCI_D0);
1807         pci_restore_state(pdev);
1808         err = pci_enable_device(pdev);
1809         if (err) {
1810                 printk(KERN_ERR "ixgbe: Cannot enable PCI device from " \
1811                                 "suspend\n");
1812                 return err;
1813         }
1814         pci_set_master(pdev);
1815
1816         pci_enable_wake(pdev, PCI_D3hot, 0);
1817         pci_enable_wake(pdev, PCI_D3cold, 0);
1818
1819         if (netif_running(netdev)) {
1820                 err = ixgbe_request_irq(adapter);
1821                 if (err)
1822                         return err;
1823         }
1824
1825         ixgbe_reset(adapter);
1826
1827         if (netif_running(netdev))
1828                 ixgbe_up(adapter);
1829
1830         netif_device_attach(netdev);
1831
1832         return 0;
1833 }
1834 #endif
1835
1836 /**
1837  * ixgbe_clean_rx_ring - Free Rx Buffers per Queue
1838  * @adapter: board private structure
1839  * @rx_ring: ring to free buffers from
1840  **/
1841 static void ixgbe_clean_rx_ring(struct ixgbe_adapter *adapter,
1842                                 struct ixgbe_ring *rx_ring)
1843 {
1844         struct pci_dev *pdev = adapter->pdev;
1845         unsigned long size;
1846         unsigned int i;
1847
1848         /* Free all the Rx ring sk_buffs */
1849
1850         for (i = 0; i < rx_ring->count; i++) {
1851                 struct ixgbe_rx_buffer *rx_buffer_info;
1852
1853                 rx_buffer_info = &rx_ring->rx_buffer_info[i];
1854                 if (rx_buffer_info->dma) {
1855                         pci_unmap_single(pdev, rx_buffer_info->dma,
1856                                          adapter->rx_buf_len,
1857                                          PCI_DMA_FROMDEVICE);
1858                         rx_buffer_info->dma = 0;
1859                 }
1860                 if (rx_buffer_info->skb) {
1861                         dev_kfree_skb(rx_buffer_info->skb);
1862                         rx_buffer_info->skb = NULL;
1863                 }
1864                 if (!rx_buffer_info->page)
1865                         continue;
1866                 pci_unmap_page(pdev, rx_buffer_info->page_dma, PAGE_SIZE,
1867                                PCI_DMA_FROMDEVICE);
1868                 rx_buffer_info->page_dma = 0;
1869
1870                 put_page(rx_buffer_info->page);
1871                 rx_buffer_info->page = NULL;
1872         }
1873
1874         size = sizeof(struct ixgbe_rx_buffer) * rx_ring->count;
1875         memset(rx_ring->rx_buffer_info, 0, size);
1876
1877         /* Zero out the descriptor ring */
1878         memset(rx_ring->desc, 0, rx_ring->size);
1879
1880         rx_ring->next_to_clean = 0;
1881         rx_ring->next_to_use = 0;
1882
1883         writel(0, adapter->hw.hw_addr + rx_ring->head);
1884         writel(0, adapter->hw.hw_addr + rx_ring->tail);
1885 }
1886
1887 /**
1888  * ixgbe_clean_tx_ring - Free Tx Buffers
1889  * @adapter: board private structure
1890  * @tx_ring: ring to be cleaned
1891  **/
1892 static void ixgbe_clean_tx_ring(struct ixgbe_adapter *adapter,
1893                                 struct ixgbe_ring *tx_ring)
1894 {
1895         struct ixgbe_tx_buffer *tx_buffer_info;
1896         unsigned long size;
1897         unsigned int i;
1898
1899         /* Free all the Tx ring sk_buffs */
1900
1901         for (i = 0; i < tx_ring->count; i++) {
1902                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
1903                 ixgbe_unmap_and_free_tx_resource(adapter, tx_buffer_info);
1904         }
1905
1906         size = sizeof(struct ixgbe_tx_buffer) * tx_ring->count;
1907         memset(tx_ring->tx_buffer_info, 0, size);
1908
1909         /* Zero out the descriptor ring */
1910         memset(tx_ring->desc, 0, tx_ring->size);
1911
1912         tx_ring->next_to_use = 0;
1913         tx_ring->next_to_clean = 0;
1914
1915         writel(0, adapter->hw.hw_addr + tx_ring->head);
1916         writel(0, adapter->hw.hw_addr + tx_ring->tail);
1917 }
1918
1919 /**
1920  * ixgbe_clean_all_rx_rings - Free Rx Buffers for all queues
1921  * @adapter: board private structure
1922  **/
1923 static void ixgbe_clean_all_rx_rings(struct ixgbe_adapter *adapter)
1924 {
1925         int i;
1926
1927         for (i = 0; i < adapter->num_rx_queues; i++)
1928                 ixgbe_clean_rx_ring(adapter, &adapter->rx_ring[i]);
1929 }
1930
1931 /**
1932  * ixgbe_clean_all_tx_rings - Free Tx Buffers for all queues
1933  * @adapter: board private structure
1934  **/
1935 static void ixgbe_clean_all_tx_rings(struct ixgbe_adapter *adapter)
1936 {
1937         int i;
1938
1939         for (i = 0; i < adapter->num_tx_queues; i++)
1940                 ixgbe_clean_tx_ring(adapter, &adapter->tx_ring[i]);
1941 }
1942
1943 void ixgbe_down(struct ixgbe_adapter *adapter)
1944 {
1945         struct net_device *netdev = adapter->netdev;
1946         u32 rxctrl;
1947
1948         /* signal that we are down to the interrupt handler */
1949         set_bit(__IXGBE_DOWN, &adapter->state);
1950
1951         /* disable receives */
1952         rxctrl = IXGBE_READ_REG(&adapter->hw, IXGBE_RXCTRL);
1953         IXGBE_WRITE_REG(&adapter->hw, IXGBE_RXCTRL,
1954                         rxctrl & ~IXGBE_RXCTRL_RXEN);
1955
1956         netif_tx_disable(netdev);
1957
1958         /* disable transmits in the hardware */
1959
1960         /* flush both disables */
1961         IXGBE_WRITE_FLUSH(&adapter->hw);
1962         msleep(10);
1963
1964         ixgbe_irq_disable(adapter);
1965
1966         ixgbe_napi_disable_all(adapter);
1967         del_timer_sync(&adapter->watchdog_timer);
1968
1969         netif_carrier_off(netdev);
1970         netif_stop_queue(netdev);
1971
1972         if (!pci_channel_offline(adapter->pdev))
1973                 ixgbe_reset(adapter);
1974         ixgbe_clean_all_tx_rings(adapter);
1975         ixgbe_clean_all_rx_rings(adapter);
1976
1977 }
1978
1979 static int ixgbe_suspend(struct pci_dev *pdev, pm_message_t state)
1980 {
1981         struct net_device *netdev = pci_get_drvdata(pdev);
1982         struct ixgbe_adapter *adapter = netdev_priv(netdev);
1983 #ifdef CONFIG_PM
1984         int retval = 0;
1985 #endif
1986
1987         netif_device_detach(netdev);
1988
1989         if (netif_running(netdev)) {
1990                 ixgbe_down(adapter);
1991                 ixgbe_free_irq(adapter);
1992         }
1993
1994 #ifdef CONFIG_PM
1995         retval = pci_save_state(pdev);
1996         if (retval)
1997                 return retval;
1998 #endif
1999
2000         pci_enable_wake(pdev, PCI_D3hot, 0);
2001         pci_enable_wake(pdev, PCI_D3cold, 0);
2002
2003         ixgbe_release_hw_control(adapter);
2004
2005         pci_disable_device(pdev);
2006
2007         pci_set_power_state(pdev, pci_choose_state(pdev, state));
2008
2009         return 0;
2010 }
2011
2012 static void ixgbe_shutdown(struct pci_dev *pdev)
2013 {
2014         ixgbe_suspend(pdev, PMSG_SUSPEND);
2015 }
2016
2017 /**
2018  * ixgbe_poll - NAPI Rx polling callback
2019  * @napi: structure for representing this polling device
2020  * @budget: how many packets driver is allowed to clean
2021  *
2022  * This function is used for legacy and MSI, NAPI mode
2023  **/
2024 static int ixgbe_poll(struct napi_struct *napi, int budget)
2025 {
2026         struct ixgbe_q_vector *q_vector = container_of(napi,
2027                                           struct ixgbe_q_vector, napi);
2028         struct ixgbe_adapter *adapter = q_vector->adapter;
2029         int tx_cleaned = 0, work_done = 0;
2030
2031 #ifdef CONFIG_DCA
2032         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
2033                 ixgbe_update_tx_dca(adapter, adapter->tx_ring);
2034                 ixgbe_update_rx_dca(adapter, adapter->rx_ring);
2035         }
2036 #endif
2037
2038         tx_cleaned = ixgbe_clean_tx_irq(adapter, adapter->tx_ring);
2039         ixgbe_clean_rx_irq(adapter, adapter->rx_ring, &work_done, budget);
2040
2041         if (tx_cleaned)
2042                 work_done = budget;
2043
2044         /* If budget not fully consumed, exit the polling mode */
2045         if (work_done < budget) {
2046                 netif_rx_complete(adapter->netdev, napi);
2047                 if (adapter->rx_eitr < IXGBE_MIN_ITR_USECS)
2048                         ixgbe_set_itr(adapter);
2049                 if (!test_bit(__IXGBE_DOWN, &adapter->state))
2050                         ixgbe_irq_enable(adapter);
2051         }
2052
2053         return work_done;
2054 }
2055
2056 /**
2057  * ixgbe_tx_timeout - Respond to a Tx Hang
2058  * @netdev: network interface device structure
2059  **/
2060 static void ixgbe_tx_timeout(struct net_device *netdev)
2061 {
2062         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2063
2064         /* Do the reset outside of interrupt context */
2065         schedule_work(&adapter->reset_task);
2066 }
2067
2068 static void ixgbe_reset_task(struct work_struct *work)
2069 {
2070         struct ixgbe_adapter *adapter;
2071         adapter = container_of(work, struct ixgbe_adapter, reset_task);
2072
2073         adapter->tx_timeout_count++;
2074
2075         ixgbe_reinit_locked(adapter);
2076 }
2077
2078 static void ixgbe_acquire_msix_vectors(struct ixgbe_adapter *adapter,
2079                                        int vectors)
2080 {
2081         int err, vector_threshold;
2082
2083         /* We'll want at least 3 (vector_threshold):
2084          * 1) TxQ[0] Cleanup
2085          * 2) RxQ[0] Cleanup
2086          * 3) Other (Link Status Change, etc.)
2087          * 4) TCP Timer (optional)
2088          */
2089         vector_threshold = MIN_MSIX_COUNT;
2090
2091         /* The more we get, the more we will assign to Tx/Rx Cleanup
2092          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
2093          * Right now, we simply care about how many we'll get; we'll
2094          * set them up later while requesting irq's.
2095          */
2096         while (vectors >= vector_threshold) {
2097                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
2098                                       vectors);
2099                 if (!err) /* Success in acquiring all requested vectors. */
2100                         break;
2101                 else if (err < 0)
2102                         vectors = 0; /* Nasty failure, quit now */
2103                 else /* err == number of vectors we should try again with */
2104                         vectors = err;
2105         }
2106
2107         if (vectors < vector_threshold) {
2108                 /* Can't allocate enough MSI-X interrupts?  Oh well.
2109                  * This just means we'll go with either a single MSI
2110                  * vector or fall back to legacy interrupts.
2111                  */
2112                 DPRINTK(HW, DEBUG, "Unable to allocate MSI-X interrupts\n");
2113                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2114                 kfree(adapter->msix_entries);
2115                 adapter->msix_entries = NULL;
2116                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2117                 adapter->num_tx_queues = 1;
2118                 adapter->num_rx_queues = 1;
2119         } else {
2120                 adapter->flags |= IXGBE_FLAG_MSIX_ENABLED; /* Woot! */
2121                 adapter->num_msix_vectors = vectors;
2122         }
2123 }
2124
2125 static void __devinit ixgbe_set_num_queues(struct ixgbe_adapter *adapter)
2126 {
2127         int nrq, ntq;
2128         int feature_mask = 0, rss_i, rss_m;
2129
2130         /* Number of supported queues */
2131         switch (adapter->hw.mac.type) {
2132         case ixgbe_mac_82598EB:
2133                 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2134                 rss_m = 0;
2135                 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2136
2137                 switch (adapter->flags & feature_mask) {
2138                 case (IXGBE_FLAG_RSS_ENABLED):
2139                         rss_m = 0xF;
2140                         nrq = rss_i;
2141 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
2142                         ntq = rss_i;
2143 #else
2144                         ntq = 1;
2145 #endif
2146                         break;
2147                 case 0:
2148                 default:
2149                         rss_i = 0;
2150                         rss_m = 0;
2151                         nrq = 1;
2152                         ntq = 1;
2153                         break;
2154                 }
2155
2156                 adapter->ring_feature[RING_F_RSS].indices = rss_i;
2157                 adapter->ring_feature[RING_F_RSS].mask = rss_m;
2158                 break;
2159         default:
2160                 nrq = 1;
2161                 ntq = 1;
2162                 break;
2163         }
2164
2165         adapter->num_rx_queues = nrq;
2166         adapter->num_tx_queues = ntq;
2167 }
2168
2169 /**
2170  * ixgbe_cache_ring_register - Descriptor ring to register mapping
2171  * @adapter: board private structure to initialize
2172  *
2173  * Once we know the feature-set enabled for the device, we'll cache
2174  * the register offset the descriptor ring is assigned to.
2175  **/
2176 static void __devinit ixgbe_cache_ring_register(struct ixgbe_adapter *adapter)
2177 {
2178         /* TODO: Remove all uses of the indices in the cases where multiple
2179          *       features are OR'd together, if the feature set makes sense.
2180          */
2181         int feature_mask = 0, rss_i;
2182         int i, txr_idx, rxr_idx;
2183
2184         /* Number of supported queues */
2185         switch (adapter->hw.mac.type) {
2186         case ixgbe_mac_82598EB:
2187                 rss_i = adapter->ring_feature[RING_F_RSS].indices;
2188                 txr_idx = 0;
2189                 rxr_idx = 0;
2190                 feature_mask |= IXGBE_FLAG_RSS_ENABLED;
2191                 switch (adapter->flags & feature_mask) {
2192                 case (IXGBE_FLAG_RSS_ENABLED):
2193                         for (i = 0; i < adapter->num_rx_queues; i++)
2194                                 adapter->rx_ring[i].reg_idx = i;
2195                         for (i = 0; i < adapter->num_tx_queues; i++)
2196                                 adapter->tx_ring[i].reg_idx = i;
2197                         break;
2198                 case 0:
2199                 default:
2200                         break;
2201                 }
2202                 break;
2203         default:
2204                 break;
2205         }
2206 }
2207
2208 /**
2209  * ixgbe_alloc_queues - Allocate memory for all rings
2210  * @adapter: board private structure to initialize
2211  *
2212  * We allocate one ring per queue at run-time since we don't know the
2213  * number of queues at compile-time.  The polling_netdev array is
2214  * intended for Multiqueue, but should work fine with a single queue.
2215  **/
2216 static int __devinit ixgbe_alloc_queues(struct ixgbe_adapter *adapter)
2217 {
2218         int i;
2219
2220         adapter->tx_ring = kcalloc(adapter->num_tx_queues,
2221                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
2222         if (!adapter->tx_ring)
2223                 goto err_tx_ring_allocation;
2224
2225         adapter->rx_ring = kcalloc(adapter->num_rx_queues,
2226                                    sizeof(struct ixgbe_ring), GFP_KERNEL);
2227         if (!adapter->rx_ring)
2228                 goto err_rx_ring_allocation;
2229
2230         for (i = 0; i < adapter->num_tx_queues; i++) {
2231                 adapter->tx_ring[i].count = IXGBE_DEFAULT_TXD;
2232                 adapter->tx_ring[i].queue_index = i;
2233         }
2234         for (i = 0; i < adapter->num_rx_queues; i++) {
2235                 adapter->rx_ring[i].count = IXGBE_DEFAULT_RXD;
2236                 adapter->rx_ring[i].queue_index = i;
2237         }
2238
2239         ixgbe_cache_ring_register(adapter);
2240
2241         return 0;
2242
2243 err_rx_ring_allocation:
2244         kfree(adapter->tx_ring);
2245 err_tx_ring_allocation:
2246         return -ENOMEM;
2247 }
2248
2249 /**
2250  * ixgbe_set_interrupt_capability - set MSI-X or MSI if supported
2251  * @adapter: board private structure to initialize
2252  *
2253  * Attempt to configure the interrupts using the best available
2254  * capabilities of the hardware and the kernel.
2255  **/
2256 static int __devinit ixgbe_set_interrupt_capability(struct ixgbe_adapter
2257                                                     *adapter)
2258 {
2259         int err = 0;
2260         int vector, v_budget;
2261
2262         /*
2263          * It's easy to be greedy for MSI-X vectors, but it really
2264          * doesn't do us much good if we have a lot more vectors
2265          * than CPU's.  So let's be conservative and only ask for
2266          * (roughly) twice the number of vectors as there are CPU's.
2267          */
2268         v_budget = min(adapter->num_rx_queues + adapter->num_tx_queues,
2269                        (int)(num_online_cpus() * 2)) + NON_Q_VECTORS;
2270
2271         /*
2272          * At the same time, hardware can only support a maximum of
2273          * MAX_MSIX_COUNT vectors.  With features such as RSS and VMDq,
2274          * we can easily reach upwards of 64 Rx descriptor queues and
2275          * 32 Tx queues.  Thus, we cap it off in those rare cases where
2276          * the cpu count also exceeds our vector limit.
2277          */
2278         v_budget = min(v_budget, MAX_MSIX_COUNT);
2279
2280         /* A failure in MSI-X entry allocation isn't fatal, but it does
2281          * mean we disable MSI-X capabilities of the adapter. */
2282         adapter->msix_entries = kcalloc(v_budget,
2283                                         sizeof(struct msix_entry), GFP_KERNEL);
2284         if (!adapter->msix_entries) {
2285                 adapter->flags &= ~IXGBE_FLAG_RSS_ENABLED;
2286                 ixgbe_set_num_queues(adapter);
2287                 kfree(adapter->tx_ring);
2288                 kfree(adapter->rx_ring);
2289                 err = ixgbe_alloc_queues(adapter);
2290                 if (err) {
2291                         DPRINTK(PROBE, ERR, "Unable to allocate memory "
2292                                             "for queues\n");
2293                         goto out;
2294                 }
2295
2296                 goto try_msi;
2297         }
2298
2299         for (vector = 0; vector < v_budget; vector++)
2300                 adapter->msix_entries[vector].entry = vector;
2301
2302         ixgbe_acquire_msix_vectors(adapter, v_budget);
2303
2304         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED)
2305                 goto out;
2306
2307 try_msi:
2308         err = pci_enable_msi(adapter->pdev);
2309         if (!err) {
2310                 adapter->flags |= IXGBE_FLAG_MSI_ENABLED;
2311         } else {
2312                 DPRINTK(HW, DEBUG, "Unable to allocate MSI interrupt, "
2313                                    "falling back to legacy.  Error: %d\n", err);
2314                 /* reset err */
2315                 err = 0;
2316         }
2317
2318 out:
2319 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
2320         /* Notify the stack of the (possibly) reduced Tx Queue count. */
2321         adapter->netdev->egress_subqueue_count = adapter->num_tx_queues;
2322 #endif
2323
2324         return err;
2325 }
2326
2327 static void ixgbe_reset_interrupt_capability(struct ixgbe_adapter *adapter)
2328 {
2329         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2330                 adapter->flags &= ~IXGBE_FLAG_MSIX_ENABLED;
2331                 pci_disable_msix(adapter->pdev);
2332                 kfree(adapter->msix_entries);
2333                 adapter->msix_entries = NULL;
2334         } else if (adapter->flags & IXGBE_FLAG_MSI_ENABLED) {
2335                 adapter->flags &= ~IXGBE_FLAG_MSI_ENABLED;
2336                 pci_disable_msi(adapter->pdev);
2337         }
2338         return;
2339 }
2340
2341 /**
2342  * ixgbe_init_interrupt_scheme - Determine proper interrupt scheme
2343  * @adapter: board private structure to initialize
2344  *
2345  * We determine which interrupt scheme to use based on...
2346  * - Kernel support (MSI, MSI-X)
2347  *   - which can be user-defined (via MODULE_PARAM)
2348  * - Hardware queue count (num_*_queues)
2349  *   - defined by miscellaneous hardware support/features (RSS, etc.)
2350  **/
2351 static int __devinit ixgbe_init_interrupt_scheme(struct ixgbe_adapter *adapter)
2352 {
2353         int err;
2354
2355         /* Number of supported queues */
2356         ixgbe_set_num_queues(adapter);
2357
2358         err = ixgbe_alloc_queues(adapter);
2359         if (err) {
2360                 DPRINTK(PROBE, ERR, "Unable to allocate memory for queues\n");
2361                 goto err_alloc_queues;
2362         }
2363
2364         err = ixgbe_set_interrupt_capability(adapter);
2365         if (err) {
2366                 DPRINTK(PROBE, ERR, "Unable to setup interrupt capabilities\n");
2367                 goto err_set_interrupt;
2368         }
2369
2370         DPRINTK(DRV, INFO, "Multiqueue %s: Rx Queue count = %u, "
2371                            "Tx Queue count = %u\n",
2372                 (adapter->num_rx_queues > 1) ? "Enabled" :
2373                 "Disabled", adapter->num_rx_queues, adapter->num_tx_queues);
2374
2375         set_bit(__IXGBE_DOWN, &adapter->state);
2376
2377         return 0;
2378
2379 err_set_interrupt:
2380         kfree(adapter->tx_ring);
2381         kfree(adapter->rx_ring);
2382 err_alloc_queues:
2383         return err;
2384 }
2385
2386 /**
2387  * ixgbe_sw_init - Initialize general software structures (struct ixgbe_adapter)
2388  * @adapter: board private structure to initialize
2389  *
2390  * ixgbe_sw_init initializes the Adapter private data structure.
2391  * Fields are initialized based on PCI device information and
2392  * OS network device settings (MTU size).
2393  **/
2394 static int __devinit ixgbe_sw_init(struct ixgbe_adapter *adapter)
2395 {
2396         struct ixgbe_hw *hw = &adapter->hw;
2397         struct pci_dev *pdev = adapter->pdev;
2398         unsigned int rss;
2399
2400         /* Set capability flags */
2401         rss = min(IXGBE_MAX_RSS_INDICES, (int)num_online_cpus());
2402         adapter->ring_feature[RING_F_RSS].indices = rss;
2403         adapter->flags |= IXGBE_FLAG_RSS_ENABLED;
2404
2405         /* Enable Dynamic interrupt throttling by default */
2406         adapter->rx_eitr = 1;
2407         adapter->tx_eitr = 1;
2408
2409         /* default flow control settings */
2410         hw->fc.original_type = ixgbe_fc_full;
2411         hw->fc.type = ixgbe_fc_full;
2412
2413         /* select 10G link by default */
2414         hw->mac.link_mode_select = IXGBE_AUTOC_LMS_10G_LINK_NO_AN;
2415         if (hw->mac.ops.reset(hw)) {
2416                 dev_err(&pdev->dev, "HW Init failed\n");
2417                 return -EIO;
2418         }
2419         if (hw->mac.ops.setup_link_speed(hw, IXGBE_LINK_SPEED_10GB_FULL, true,
2420                                          false)) {
2421                 dev_err(&pdev->dev, "Link Speed setup failed\n");
2422                 return -EIO;
2423         }
2424
2425         /* initialize eeprom parameters */
2426         if (ixgbe_init_eeprom(hw)) {
2427                 dev_err(&pdev->dev, "EEPROM initialization failed\n");
2428                 return -EIO;
2429         }
2430
2431         /* enable rx csum by default */
2432         adapter->flags |= IXGBE_FLAG_RX_CSUM_ENABLED;
2433
2434         set_bit(__IXGBE_DOWN, &adapter->state);
2435
2436         return 0;
2437 }
2438
2439 /**
2440  * ixgbe_setup_tx_resources - allocate Tx resources (Descriptors)
2441  * @adapter: board private structure
2442  * @txdr:    tx descriptor ring (for a specific queue) to setup
2443  *
2444  * Return 0 on success, negative on failure
2445  **/
2446 int ixgbe_setup_tx_resources(struct ixgbe_adapter *adapter,
2447                              struct ixgbe_ring *txdr)
2448 {
2449         struct pci_dev *pdev = adapter->pdev;
2450         int size;
2451
2452         size = sizeof(struct ixgbe_tx_buffer) * txdr->count;
2453         txdr->tx_buffer_info = vmalloc(size);
2454         if (!txdr->tx_buffer_info) {
2455                 DPRINTK(PROBE, ERR,
2456                 "Unable to allocate memory for the transmit descriptor ring\n");
2457                 return -ENOMEM;
2458         }
2459         memset(txdr->tx_buffer_info, 0, size);
2460
2461         /* round up to nearest 4K */
2462         txdr->size = txdr->count * sizeof(union ixgbe_adv_tx_desc);
2463         txdr->size = ALIGN(txdr->size, 4096);
2464
2465         txdr->desc = pci_alloc_consistent(pdev, txdr->size, &txdr->dma);
2466         if (!txdr->desc) {
2467                 vfree(txdr->tx_buffer_info);
2468                 DPRINTK(PROBE, ERR,
2469                         "Memory allocation failed for the tx desc ring\n");
2470                 return -ENOMEM;
2471         }
2472
2473         txdr->next_to_use = 0;
2474         txdr->next_to_clean = 0;
2475         txdr->work_limit = txdr->count;
2476
2477         return 0;
2478 }
2479
2480 /**
2481  * ixgbe_setup_rx_resources - allocate Rx resources (Descriptors)
2482  * @adapter: board private structure
2483  * @rxdr:    rx descriptor ring (for a specific queue) to setup
2484  *
2485  * Returns 0 on success, negative on failure
2486  **/
2487 int ixgbe_setup_rx_resources(struct ixgbe_adapter *adapter,
2488                              struct ixgbe_ring *rxdr)
2489 {
2490         struct pci_dev *pdev = adapter->pdev;
2491         int size;
2492
2493         size = sizeof(struct ixgbe_rx_buffer) * rxdr->count;
2494         rxdr->rx_buffer_info = vmalloc(size);
2495         if (!rxdr->rx_buffer_info) {
2496                 DPRINTK(PROBE, ERR,
2497                         "vmalloc allocation failed for the rx desc ring\n");
2498                 return -ENOMEM;
2499         }
2500         memset(rxdr->rx_buffer_info, 0, size);
2501
2502         /* Round up to nearest 4K */
2503         rxdr->size = rxdr->count * sizeof(union ixgbe_adv_rx_desc);
2504         rxdr->size = ALIGN(rxdr->size, 4096);
2505
2506         rxdr->desc = pci_alloc_consistent(pdev, rxdr->size, &rxdr->dma);
2507
2508         if (!rxdr->desc) {
2509                 DPRINTK(PROBE, ERR,
2510                         "Memory allocation failed for the rx desc ring\n");
2511                 vfree(rxdr->rx_buffer_info);
2512                 return -ENOMEM;
2513         }
2514
2515         rxdr->next_to_clean = 0;
2516         rxdr->next_to_use = 0;
2517
2518         return 0;
2519 }
2520
2521 /**
2522  * ixgbe_free_tx_resources - Free Tx Resources per Queue
2523  * @adapter: board private structure
2524  * @tx_ring: Tx descriptor ring for a specific queue
2525  *
2526  * Free all transmit software resources
2527  **/
2528 static void ixgbe_free_tx_resources(struct ixgbe_adapter *adapter,
2529                                     struct ixgbe_ring *tx_ring)
2530 {
2531         struct pci_dev *pdev = adapter->pdev;
2532
2533         ixgbe_clean_tx_ring(adapter, tx_ring);
2534
2535         vfree(tx_ring->tx_buffer_info);
2536         tx_ring->tx_buffer_info = NULL;
2537
2538         pci_free_consistent(pdev, tx_ring->size, tx_ring->desc, tx_ring->dma);
2539
2540         tx_ring->desc = NULL;
2541 }
2542
2543 /**
2544  * ixgbe_free_all_tx_resources - Free Tx Resources for All Queues
2545  * @adapter: board private structure
2546  *
2547  * Free all transmit software resources
2548  **/
2549 static void ixgbe_free_all_tx_resources(struct ixgbe_adapter *adapter)
2550 {
2551         int i;
2552
2553         for (i = 0; i < adapter->num_tx_queues; i++)
2554                 ixgbe_free_tx_resources(adapter, &adapter->tx_ring[i]);
2555 }
2556
2557 /**
2558  * ixgbe_free_rx_resources - Free Rx Resources
2559  * @adapter: board private structure
2560  * @rx_ring: ring to clean the resources from
2561  *
2562  * Free all receive software resources
2563  **/
2564 static void ixgbe_free_rx_resources(struct ixgbe_adapter *adapter,
2565                                     struct ixgbe_ring *rx_ring)
2566 {
2567         struct pci_dev *pdev = adapter->pdev;
2568
2569         ixgbe_clean_rx_ring(adapter, rx_ring);
2570
2571         vfree(rx_ring->rx_buffer_info);
2572         rx_ring->rx_buffer_info = NULL;
2573
2574         pci_free_consistent(pdev, rx_ring->size, rx_ring->desc, rx_ring->dma);
2575
2576         rx_ring->desc = NULL;
2577 }
2578
2579 /**
2580  * ixgbe_free_all_rx_resources - Free Rx Resources for All Queues
2581  * @adapter: board private structure
2582  *
2583  * Free all receive software resources
2584  **/
2585 static void ixgbe_free_all_rx_resources(struct ixgbe_adapter *adapter)
2586 {
2587         int i;
2588
2589         for (i = 0; i < adapter->num_rx_queues; i++)
2590                 ixgbe_free_rx_resources(adapter, &adapter->rx_ring[i]);
2591 }
2592
2593 /**
2594  * ixgbe_setup_all_tx_resources - allocate all queues Tx resources
2595  * @adapter: board private structure
2596  *
2597  * If this function returns with an error, then it's possible one or
2598  * more of the rings is populated (while the rest are not).  It is the
2599  * callers duty to clean those orphaned rings.
2600  *
2601  * Return 0 on success, negative on failure
2602  **/
2603 static int ixgbe_setup_all_tx_resources(struct ixgbe_adapter *adapter)
2604 {
2605         int i, err = 0;
2606
2607         for (i = 0; i < adapter->num_tx_queues; i++) {
2608                 err = ixgbe_setup_tx_resources(adapter, &adapter->tx_ring[i]);
2609                 if (err) {
2610                         DPRINTK(PROBE, ERR,
2611                                 "Allocation for Tx Queue %u failed\n", i);
2612                         break;
2613                 }
2614         }
2615
2616         return err;
2617 }
2618
2619 /**
2620  * ixgbe_setup_all_rx_resources - allocate all queues Rx resources
2621  * @adapter: board private structure
2622  *
2623  * If this function returns with an error, then it's possible one or
2624  * more of the rings is populated (while the rest are not).  It is the
2625  * callers duty to clean those orphaned rings.
2626  *
2627  * Return 0 on success, negative on failure
2628  **/
2629
2630 static int ixgbe_setup_all_rx_resources(struct ixgbe_adapter *adapter)
2631 {
2632         int i, err = 0;
2633
2634         for (i = 0; i < adapter->num_rx_queues; i++) {
2635                 err = ixgbe_setup_rx_resources(adapter, &adapter->rx_ring[i]);
2636                 if (err) {
2637                         DPRINTK(PROBE, ERR,
2638                                 "Allocation for Rx Queue %u failed\n", i);
2639                         break;
2640                 }
2641         }
2642
2643         return err;
2644 }
2645
2646 /**
2647  * ixgbe_change_mtu - Change the Maximum Transfer Unit
2648  * @netdev: network interface device structure
2649  * @new_mtu: new value for maximum frame size
2650  *
2651  * Returns 0 on success, negative on failure
2652  **/
2653 static int ixgbe_change_mtu(struct net_device *netdev, int new_mtu)
2654 {
2655         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2656         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2657
2658         if ((max_frame < (ETH_ZLEN + ETH_FCS_LEN)) ||
2659             (max_frame > IXGBE_MAX_JUMBO_FRAME_SIZE))
2660                 return -EINVAL;
2661
2662         DPRINTK(PROBE, INFO, "changing MTU from %d to %d\n",
2663                 netdev->mtu, new_mtu);
2664         /* must set new MTU before calling down or up */
2665         netdev->mtu = new_mtu;
2666
2667         if (netif_running(netdev))
2668                 ixgbe_reinit_locked(adapter);
2669
2670         return 0;
2671 }
2672
2673 /**
2674  * ixgbe_open - Called when a network interface is made active
2675  * @netdev: network interface device structure
2676  *
2677  * Returns 0 on success, negative value on failure
2678  *
2679  * The open entry point is called when a network interface is made
2680  * active by the system (IFF_UP).  At this point all resources needed
2681  * for transmit and receive operations are allocated, the interrupt
2682  * handler is registered with the OS, the watchdog timer is started,
2683  * and the stack is notified that the interface is ready.
2684  **/
2685 static int ixgbe_open(struct net_device *netdev)
2686 {
2687         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2688         int err;
2689
2690         /* disallow open during test */
2691         if (test_bit(__IXGBE_TESTING, &adapter->state))
2692                 return -EBUSY;
2693
2694         /* allocate transmit descriptors */
2695         err = ixgbe_setup_all_tx_resources(adapter);
2696         if (err)
2697                 goto err_setup_tx;
2698
2699         /* allocate receive descriptors */
2700         err = ixgbe_setup_all_rx_resources(adapter);
2701         if (err)
2702                 goto err_setup_rx;
2703
2704         ixgbe_configure(adapter);
2705
2706         err = ixgbe_request_irq(adapter);
2707         if (err)
2708                 goto err_req_irq;
2709
2710         err = ixgbe_up_complete(adapter);
2711         if (err)
2712                 goto err_up;
2713
2714         return 0;
2715
2716 err_up:
2717         ixgbe_release_hw_control(adapter);
2718         ixgbe_free_irq(adapter);
2719 err_req_irq:
2720         ixgbe_free_all_rx_resources(adapter);
2721 err_setup_rx:
2722         ixgbe_free_all_tx_resources(adapter);
2723 err_setup_tx:
2724         ixgbe_reset(adapter);
2725
2726         return err;
2727 }
2728
2729 /**
2730  * ixgbe_close - Disables a network interface
2731  * @netdev: network interface device structure
2732  *
2733  * Returns 0, this is not allowed to fail
2734  *
2735  * The close entry point is called when an interface is de-activated
2736  * by the OS.  The hardware is still under the drivers control, but
2737  * needs to be disabled.  A global MAC reset is issued to stop the
2738  * hardware, and all transmit and receive resources are freed.
2739  **/
2740 static int ixgbe_close(struct net_device *netdev)
2741 {
2742         struct ixgbe_adapter *adapter = netdev_priv(netdev);
2743
2744         ixgbe_down(adapter);
2745         ixgbe_free_irq(adapter);
2746
2747         ixgbe_free_all_tx_resources(adapter);
2748         ixgbe_free_all_rx_resources(adapter);
2749
2750         ixgbe_release_hw_control(adapter);
2751
2752         return 0;
2753 }
2754
2755 /**
2756  * ixgbe_update_stats - Update the board statistics counters.
2757  * @adapter: board private structure
2758  **/
2759 void ixgbe_update_stats(struct ixgbe_adapter *adapter)
2760 {
2761         struct ixgbe_hw *hw = &adapter->hw;
2762         u64 total_mpc = 0;
2763         u32 i, missed_rx = 0, mpc, bprc, lxon, lxoff, xon_off_tot;
2764
2765         adapter->stats.crcerrs += IXGBE_READ_REG(hw, IXGBE_CRCERRS);
2766         for (i = 0; i < 8; i++) {
2767                 /* for packet buffers not used, the register should read 0 */
2768                 mpc = IXGBE_READ_REG(hw, IXGBE_MPC(i));
2769                 missed_rx += mpc;
2770                 adapter->stats.mpc[i] += mpc;
2771                 total_mpc += adapter->stats.mpc[i];
2772                 adapter->stats.rnbc[i] += IXGBE_READ_REG(hw, IXGBE_RNBC(i));
2773         }
2774         adapter->stats.gprc += IXGBE_READ_REG(hw, IXGBE_GPRC);
2775         /* work around hardware counting issue */
2776         adapter->stats.gprc -= missed_rx;
2777
2778         /* 82598 hardware only has a 32 bit counter in the high register */
2779         adapter->stats.gorc += IXGBE_READ_REG(hw, IXGBE_GORCH);
2780         adapter->stats.gotc += IXGBE_READ_REG(hw, IXGBE_GOTCH);
2781         adapter->stats.tor += IXGBE_READ_REG(hw, IXGBE_TORH);
2782         bprc = IXGBE_READ_REG(hw, IXGBE_BPRC);
2783         adapter->stats.bprc += bprc;
2784         adapter->stats.mprc += IXGBE_READ_REG(hw, IXGBE_MPRC);
2785         adapter->stats.mprc -= bprc;
2786         adapter->stats.roc += IXGBE_READ_REG(hw, IXGBE_ROC);
2787         adapter->stats.prc64 += IXGBE_READ_REG(hw, IXGBE_PRC64);
2788         adapter->stats.prc127 += IXGBE_READ_REG(hw, IXGBE_PRC127);
2789         adapter->stats.prc255 += IXGBE_READ_REG(hw, IXGBE_PRC255);
2790         adapter->stats.prc511 += IXGBE_READ_REG(hw, IXGBE_PRC511);
2791         adapter->stats.prc1023 += IXGBE_READ_REG(hw, IXGBE_PRC1023);
2792         adapter->stats.prc1522 += IXGBE_READ_REG(hw, IXGBE_PRC1522);
2793         adapter->stats.rlec += IXGBE_READ_REG(hw, IXGBE_RLEC);
2794         adapter->stats.lxonrxc += IXGBE_READ_REG(hw, IXGBE_LXONRXC);
2795         adapter->stats.lxoffrxc += IXGBE_READ_REG(hw, IXGBE_LXOFFRXC);
2796         lxon = IXGBE_READ_REG(hw, IXGBE_LXONTXC);
2797         adapter->stats.lxontxc += lxon;
2798         lxoff = IXGBE_READ_REG(hw, IXGBE_LXOFFTXC);
2799         adapter->stats.lxofftxc += lxoff;
2800         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2801         adapter->stats.gptc += IXGBE_READ_REG(hw, IXGBE_GPTC);
2802         adapter->stats.mptc += IXGBE_READ_REG(hw, IXGBE_MPTC);
2803         /*
2804          * 82598 errata - tx of flow control packets is included in tx counters
2805          */
2806         xon_off_tot = lxon + lxoff;
2807         adapter->stats.gptc -= xon_off_tot;
2808         adapter->stats.mptc -= xon_off_tot;
2809         adapter->stats.gotc -= (xon_off_tot * (ETH_ZLEN + ETH_FCS_LEN));
2810         adapter->stats.ruc += IXGBE_READ_REG(hw, IXGBE_RUC);
2811         adapter->stats.rfc += IXGBE_READ_REG(hw, IXGBE_RFC);
2812         adapter->stats.rjc += IXGBE_READ_REG(hw, IXGBE_RJC);
2813         adapter->stats.tpr += IXGBE_READ_REG(hw, IXGBE_TPR);
2814         adapter->stats.ptc64 += IXGBE_READ_REG(hw, IXGBE_PTC64);
2815         adapter->stats.ptc64 -= xon_off_tot;
2816         adapter->stats.ptc127 += IXGBE_READ_REG(hw, IXGBE_PTC127);
2817         adapter->stats.ptc255 += IXGBE_READ_REG(hw, IXGBE_PTC255);
2818         adapter->stats.ptc511 += IXGBE_READ_REG(hw, IXGBE_PTC511);
2819         adapter->stats.ptc1023 += IXGBE_READ_REG(hw, IXGBE_PTC1023);
2820         adapter->stats.ptc1522 += IXGBE_READ_REG(hw, IXGBE_PTC1522);
2821         adapter->stats.bptc += IXGBE_READ_REG(hw, IXGBE_BPTC);
2822
2823         /* Fill out the OS statistics structure */
2824         adapter->net_stats.multicast = adapter->stats.mprc;
2825
2826         /* Rx Errors */
2827         adapter->net_stats.rx_errors = adapter->stats.crcerrs +
2828                                                 adapter->stats.rlec;
2829         adapter->net_stats.rx_dropped = 0;
2830         adapter->net_stats.rx_length_errors = adapter->stats.rlec;
2831         adapter->net_stats.rx_crc_errors = adapter->stats.crcerrs;
2832         adapter->net_stats.rx_missed_errors = total_mpc;
2833 }
2834
2835 /**
2836  * ixgbe_watchdog - Timer Call-back
2837  * @data: pointer to adapter cast into an unsigned long
2838  **/
2839 static void ixgbe_watchdog(unsigned long data)
2840 {
2841         struct ixgbe_adapter *adapter = (struct ixgbe_adapter *)data;
2842         struct net_device *netdev = adapter->netdev;
2843         bool link_up;
2844         u32 link_speed = 0;
2845 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
2846         int i;
2847 #endif
2848
2849         adapter->hw.mac.ops.check_link(&adapter->hw, &(link_speed), &link_up);
2850
2851         if (link_up) {
2852                 if (!netif_carrier_ok(netdev)) {
2853                         u32 frctl = IXGBE_READ_REG(&adapter->hw, IXGBE_FCTRL);
2854                         u32 rmcs = IXGBE_READ_REG(&adapter->hw, IXGBE_RMCS);
2855 #define FLOW_RX (frctl & IXGBE_FCTRL_RFCE)
2856 #define FLOW_TX (rmcs & IXGBE_RMCS_TFCE_802_3X)
2857                         DPRINTK(LINK, INFO, "NIC Link is Up %s, "
2858                                 "Flow Control: %s\n",
2859                                 (link_speed == IXGBE_LINK_SPEED_10GB_FULL ?
2860                                  "10 Gbps" :
2861                                  (link_speed == IXGBE_LINK_SPEED_1GB_FULL ?
2862                                   "1 Gbps" : "unknown speed")),
2863                                 ((FLOW_RX && FLOW_TX) ? "RX/TX" :
2864                                  (FLOW_RX ? "RX" :
2865                                  (FLOW_TX ? "TX" : "None"))));
2866
2867                         netif_carrier_on(netdev);
2868                         netif_wake_queue(netdev);
2869 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
2870                         for (i = 0; i < adapter->num_tx_queues; i++)
2871                                 netif_wake_subqueue(netdev, i);
2872 #endif
2873                 } else {
2874                         /* Force detection of hung controller */
2875                         adapter->detect_tx_hung = true;
2876                 }
2877         } else {
2878                 if (netif_carrier_ok(netdev)) {
2879                         DPRINTK(LINK, INFO, "NIC Link is Down\n");
2880                         netif_carrier_off(netdev);
2881                         netif_stop_queue(netdev);
2882                 }
2883         }
2884
2885         ixgbe_update_stats(adapter);
2886
2887         if (!test_bit(__IXGBE_DOWN, &adapter->state)) {
2888                 /* Cause software interrupt to ensure rx rings are cleaned */
2889                 if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
2890                         u32 eics =
2891                          (1 << (adapter->num_msix_vectors - NON_Q_VECTORS)) - 1;
2892                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS, eics);
2893                 } else {
2894                         /* for legacy and MSI interrupts don't set any bits that
2895                          * are enabled for EIAM, because this operation would
2896                          * set *both* EIMS and EICS for any bit in EIAM */
2897                         IXGBE_WRITE_REG(&adapter->hw, IXGBE_EICS,
2898                                      (IXGBE_EICS_TCP_TIMER | IXGBE_EICS_OTHER));
2899                 }
2900                 /* Reset the timer */
2901                 mod_timer(&adapter->watchdog_timer,
2902                           round_jiffies(jiffies + 2 * HZ));
2903         }
2904 }
2905
2906 static int ixgbe_tso(struct ixgbe_adapter *adapter,
2907                          struct ixgbe_ring *tx_ring, struct sk_buff *skb,
2908                          u32 tx_flags, u8 *hdr_len)
2909 {
2910         struct ixgbe_adv_tx_context_desc *context_desc;
2911         unsigned int i;
2912         int err;
2913         struct ixgbe_tx_buffer *tx_buffer_info;
2914         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2915         u32 mss_l4len_idx = 0, l4len;
2916
2917         if (skb_is_gso(skb)) {
2918                 if (skb_header_cloned(skb)) {
2919                         err = pskb_expand_head(skb, 0, 0, GFP_ATOMIC);
2920                         if (err)
2921                                 return err;
2922                 }
2923                 l4len = tcp_hdrlen(skb);
2924                 *hdr_len += l4len;
2925
2926                 if (skb->protocol == htons(ETH_P_IP)) {
2927                         struct iphdr *iph = ip_hdr(skb);
2928                         iph->tot_len = 0;
2929                         iph->check = 0;
2930                         tcp_hdr(skb)->check = ~csum_tcpudp_magic(iph->saddr,
2931                                                                  iph->daddr, 0,
2932                                                                  IPPROTO_TCP,
2933                                                                  0);
2934                         adapter->hw_tso_ctxt++;
2935                 } else if (skb_shinfo(skb)->gso_type == SKB_GSO_TCPV6) {
2936                         ipv6_hdr(skb)->payload_len = 0;
2937                         tcp_hdr(skb)->check =
2938                             ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
2939                                              &ipv6_hdr(skb)->daddr,
2940                                              0, IPPROTO_TCP, 0);
2941                         adapter->hw_tso6_ctxt++;
2942                 }
2943
2944                 i = tx_ring->next_to_use;
2945
2946                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
2947                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
2948
2949                 /* VLAN MACLEN IPLEN */
2950                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
2951                         vlan_macip_lens |=
2952                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
2953                 vlan_macip_lens |= ((skb_network_offset(skb)) <<
2954                                     IXGBE_ADVTXD_MACLEN_SHIFT);
2955                 *hdr_len += skb_network_offset(skb);
2956                 vlan_macip_lens |=
2957                     (skb_transport_header(skb) - skb_network_header(skb));
2958                 *hdr_len +=
2959                     (skb_transport_header(skb) - skb_network_header(skb));
2960                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
2961                 context_desc->seqnum_seed = 0;
2962
2963                 /* ADV DTYP TUCMD MKRLOC/ISCSIHEDLEN */
2964                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
2965                                     IXGBE_ADVTXD_DTYP_CTXT);
2966
2967                 if (skb->protocol == htons(ETH_P_IP))
2968                         type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
2969                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_L4T_TCP;
2970                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
2971
2972                 /* MSS L4LEN IDX */
2973                 mss_l4len_idx |=
2974                     (skb_shinfo(skb)->gso_size << IXGBE_ADVTXD_MSS_SHIFT);
2975                 mss_l4len_idx |= (l4len << IXGBE_ADVTXD_L4LEN_SHIFT);
2976                 context_desc->mss_l4len_idx = cpu_to_le32(mss_l4len_idx);
2977
2978                 tx_buffer_info->time_stamp = jiffies;
2979                 tx_buffer_info->next_to_watch = i;
2980
2981                 i++;
2982                 if (i == tx_ring->count)
2983                         i = 0;
2984                 tx_ring->next_to_use = i;
2985
2986                 return true;
2987         }
2988         return false;
2989 }
2990
2991 static bool ixgbe_tx_csum(struct ixgbe_adapter *adapter,
2992                                    struct ixgbe_ring *tx_ring,
2993                                    struct sk_buff *skb, u32 tx_flags)
2994 {
2995         struct ixgbe_adv_tx_context_desc *context_desc;
2996         unsigned int i;
2997         struct ixgbe_tx_buffer *tx_buffer_info;
2998         u32 vlan_macip_lens = 0, type_tucmd_mlhl = 0;
2999
3000         if (skb->ip_summed == CHECKSUM_PARTIAL ||
3001             (tx_flags & IXGBE_TX_FLAGS_VLAN)) {
3002                 i = tx_ring->next_to_use;
3003                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3004                 context_desc = IXGBE_TX_CTXTDESC_ADV(*tx_ring, i);
3005
3006                 if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3007                         vlan_macip_lens |=
3008                             (tx_flags & IXGBE_TX_FLAGS_VLAN_MASK);
3009                 vlan_macip_lens |= (skb_network_offset(skb) <<
3010                                     IXGBE_ADVTXD_MACLEN_SHIFT);
3011                 if (skb->ip_summed == CHECKSUM_PARTIAL)
3012                         vlan_macip_lens |= (skb_transport_header(skb) -
3013                                             skb_network_header(skb));
3014
3015                 context_desc->vlan_macip_lens = cpu_to_le32(vlan_macip_lens);
3016                 context_desc->seqnum_seed = 0;
3017
3018                 type_tucmd_mlhl |= (IXGBE_TXD_CMD_DEXT |
3019                                     IXGBE_ADVTXD_DTYP_CTXT);
3020
3021                 if (skb->ip_summed == CHECKSUM_PARTIAL) {
3022                         switch (skb->protocol) {
3023                         case __constant_htons(ETH_P_IP):
3024                                 type_tucmd_mlhl |= IXGBE_ADVTXD_TUCMD_IPV4;
3025                                 if (ip_hdr(skb)->protocol == IPPROTO_TCP)
3026                                         type_tucmd_mlhl |=
3027                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3028                                 break;
3029
3030                         case __constant_htons(ETH_P_IPV6):
3031                                 /* XXX what about other V6 headers?? */
3032                                 if (ipv6_hdr(skb)->nexthdr == IPPROTO_TCP)
3033                                         type_tucmd_mlhl |=
3034                                                 IXGBE_ADVTXD_TUCMD_L4T_TCP;
3035                                 break;
3036
3037                         default:
3038                                 if (unlikely(net_ratelimit())) {
3039                                         DPRINTK(PROBE, WARNING,
3040                                          "partial checksum but proto=%x!\n",
3041                                          skb->protocol);
3042                                 }
3043                                 break;
3044                         }
3045                 }
3046
3047                 context_desc->type_tucmd_mlhl = cpu_to_le32(type_tucmd_mlhl);
3048                 context_desc->mss_l4len_idx = 0;
3049
3050                 tx_buffer_info->time_stamp = jiffies;
3051                 tx_buffer_info->next_to_watch = i;
3052                 adapter->hw_csum_tx_good++;
3053                 i++;
3054                 if (i == tx_ring->count)
3055                         i = 0;
3056                 tx_ring->next_to_use = i;
3057
3058                 return true;
3059         }
3060         return false;
3061 }
3062
3063 static int ixgbe_tx_map(struct ixgbe_adapter *adapter,
3064                         struct ixgbe_ring *tx_ring,
3065                         struct sk_buff *skb, unsigned int first)
3066 {
3067         struct ixgbe_tx_buffer *tx_buffer_info;
3068         unsigned int len = skb->len;
3069         unsigned int offset = 0, size, count = 0, i;
3070         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3071         unsigned int f;
3072
3073         len -= skb->data_len;
3074
3075         i = tx_ring->next_to_use;
3076
3077         while (len) {
3078                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3079                 size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3080
3081                 tx_buffer_info->length = size;
3082                 tx_buffer_info->dma = pci_map_single(adapter->pdev,
3083                                                   skb->data + offset,
3084                                                   size, PCI_DMA_TODEVICE);
3085                 tx_buffer_info->time_stamp = jiffies;
3086                 tx_buffer_info->next_to_watch = i;
3087
3088                 len -= size;
3089                 offset += size;
3090                 count++;
3091                 i++;
3092                 if (i == tx_ring->count)
3093                         i = 0;
3094         }
3095
3096         for (f = 0; f < nr_frags; f++) {
3097                 struct skb_frag_struct *frag;
3098
3099                 frag = &skb_shinfo(skb)->frags[f];
3100                 len = frag->size;
3101                 offset = frag->page_offset;
3102
3103                 while (len) {
3104                         tx_buffer_info = &tx_ring->tx_buffer_info[i];
3105                         size = min(len, (uint)IXGBE_MAX_DATA_PER_TXD);
3106
3107                         tx_buffer_info->length = size;
3108                         tx_buffer_info->dma = pci_map_page(adapter->pdev,
3109                                                         frag->page,
3110                                                         offset,
3111                                                         size, PCI_DMA_TODEVICE);
3112                         tx_buffer_info->time_stamp = jiffies;
3113                         tx_buffer_info->next_to_watch = i;
3114
3115                         len -= size;
3116                         offset += size;
3117                         count++;
3118                         i++;
3119                         if (i == tx_ring->count)
3120                                 i = 0;
3121                 }
3122         }
3123         if (i == 0)
3124                 i = tx_ring->count - 1;
3125         else
3126                 i = i - 1;
3127         tx_ring->tx_buffer_info[i].skb = skb;
3128         tx_ring->tx_buffer_info[first].next_to_watch = i;
3129
3130         return count;
3131 }
3132
3133 static void ixgbe_tx_queue(struct ixgbe_adapter *adapter,
3134                                struct ixgbe_ring *tx_ring,
3135                                int tx_flags, int count, u32 paylen, u8 hdr_len)
3136 {
3137         union ixgbe_adv_tx_desc *tx_desc = NULL;
3138         struct ixgbe_tx_buffer *tx_buffer_info;
3139         u32 olinfo_status = 0, cmd_type_len = 0;
3140         unsigned int i;
3141         u32 txd_cmd = IXGBE_TXD_CMD_EOP | IXGBE_TXD_CMD_RS | IXGBE_TXD_CMD_IFCS;
3142
3143         cmd_type_len |= IXGBE_ADVTXD_DTYP_DATA;
3144
3145         cmd_type_len |= IXGBE_ADVTXD_DCMD_IFCS | IXGBE_ADVTXD_DCMD_DEXT;
3146
3147         if (tx_flags & IXGBE_TX_FLAGS_VLAN)
3148                 cmd_type_len |= IXGBE_ADVTXD_DCMD_VLE;
3149
3150         if (tx_flags & IXGBE_TX_FLAGS_TSO) {
3151                 cmd_type_len |= IXGBE_ADVTXD_DCMD_TSE;
3152
3153                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3154                                                 IXGBE_ADVTXD_POPTS_SHIFT;
3155
3156                 if (tx_flags & IXGBE_TX_FLAGS_IPV4)
3157                         olinfo_status |= IXGBE_TXD_POPTS_IXSM <<
3158                                                 IXGBE_ADVTXD_POPTS_SHIFT;
3159
3160         } else if (tx_flags & IXGBE_TX_FLAGS_CSUM)
3161                 olinfo_status |= IXGBE_TXD_POPTS_TXSM <<
3162                                                 IXGBE_ADVTXD_POPTS_SHIFT;
3163
3164         olinfo_status |= ((paylen - hdr_len) << IXGBE_ADVTXD_PAYLEN_SHIFT);
3165
3166         i = tx_ring->next_to_use;
3167         while (count--) {
3168                 tx_buffer_info = &tx_ring->tx_buffer_info[i];
3169                 tx_desc = IXGBE_TX_DESC_ADV(*tx_ring, i);
3170                 tx_desc->read.buffer_addr = cpu_to_le64(tx_buffer_info->dma);
3171                 tx_desc->read.cmd_type_len =
3172                         cpu_to_le32(cmd_type_len | tx_buffer_info->length);
3173                 tx_desc->read.olinfo_status = cpu_to_le32(olinfo_status);
3174
3175                 i++;
3176                 if (i == tx_ring->count)
3177                         i = 0;
3178         }
3179
3180         tx_desc->read.cmd_type_len |= cpu_to_le32(txd_cmd);
3181
3182         /*
3183          * Force memory writes to complete before letting h/w
3184          * know there are new descriptors to fetch.  (Only
3185          * applicable for weak-ordered memory model archs,
3186          * such as IA-64).
3187          */
3188         wmb();
3189
3190         tx_ring->next_to_use = i;
3191         writel(i, adapter->hw.hw_addr + tx_ring->tail);
3192 }
3193
3194 static int __ixgbe_maybe_stop_tx(struct net_device *netdev,
3195                                  struct ixgbe_ring *tx_ring, int size)
3196 {
3197         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3198
3199 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3200         netif_stop_subqueue(netdev, tx_ring->queue_index);
3201 #else
3202         netif_stop_queue(netdev);
3203 #endif
3204         /* Herbert's original patch had:
3205          *  smp_mb__after_netif_stop_queue();
3206          * but since that doesn't exist yet, just open code it. */
3207         smp_mb();
3208
3209         /* We need to check again in a case another CPU has just
3210          * made room available. */
3211         if (likely(IXGBE_DESC_UNUSED(tx_ring) < size))
3212                 return -EBUSY;
3213
3214         /* A reprieve! - use start_queue because it doesn't call schedule */
3215 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3216         netif_wake_subqueue(netdev, tx_ring->queue_index);
3217 #else
3218         netif_wake_queue(netdev);
3219 #endif
3220         ++adapter->restart_queue;
3221         return 0;
3222 }
3223
3224 static int ixgbe_maybe_stop_tx(struct net_device *netdev,
3225                                struct ixgbe_ring *tx_ring, int size)
3226 {
3227         if (likely(IXGBE_DESC_UNUSED(tx_ring) >= size))
3228                 return 0;
3229         return __ixgbe_maybe_stop_tx(netdev, tx_ring, size);
3230 }
3231
3232
3233 static int ixgbe_xmit_frame(struct sk_buff *skb, struct net_device *netdev)
3234 {
3235         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3236         struct ixgbe_ring *tx_ring;
3237         unsigned int len = skb->len;
3238         unsigned int first;
3239         unsigned int tx_flags = 0;
3240         u8 hdr_len = 0;
3241         int r_idx = 0, tso;
3242         unsigned int mss = 0;
3243         int count = 0;
3244         unsigned int f;
3245         unsigned int nr_frags = skb_shinfo(skb)->nr_frags;
3246         len -= skb->data_len;
3247 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3248         r_idx = (adapter->num_tx_queues - 1) & skb->queue_mapping;
3249 #endif
3250         tx_ring = &adapter->tx_ring[r_idx];
3251
3252
3253         if (skb->len <= 0) {
3254                 dev_kfree_skb(skb);
3255                 return NETDEV_TX_OK;
3256         }
3257         mss = skb_shinfo(skb)->gso_size;
3258
3259         if (mss)
3260                 count++;
3261         else if (skb->ip_summed == CHECKSUM_PARTIAL)
3262                 count++;
3263
3264         count += TXD_USE_COUNT(len);
3265         for (f = 0; f < nr_frags; f++)
3266                 count += TXD_USE_COUNT(skb_shinfo(skb)->frags[f].size);
3267
3268         if (ixgbe_maybe_stop_tx(netdev, tx_ring, count)) {
3269                 adapter->tx_busy++;
3270                 return NETDEV_TX_BUSY;
3271         }
3272         if (adapter->vlgrp && vlan_tx_tag_present(skb)) {
3273                 tx_flags |= IXGBE_TX_FLAGS_VLAN;
3274                 tx_flags |= (vlan_tx_tag_get(skb) << IXGBE_TX_FLAGS_VLAN_SHIFT);
3275         }
3276
3277         if (skb->protocol == htons(ETH_P_IP))
3278                 tx_flags |= IXGBE_TX_FLAGS_IPV4;
3279         first = tx_ring->next_to_use;
3280         tso = ixgbe_tso(adapter, tx_ring, skb, tx_flags, &hdr_len);
3281         if (tso < 0) {
3282                 dev_kfree_skb_any(skb);
3283                 return NETDEV_TX_OK;
3284         }
3285
3286         if (tso)
3287                 tx_flags |= IXGBE_TX_FLAGS_TSO;
3288         else if (ixgbe_tx_csum(adapter, tx_ring, skb, tx_flags) &&
3289                  (skb->ip_summed == CHECKSUM_PARTIAL))
3290                 tx_flags |= IXGBE_TX_FLAGS_CSUM;
3291
3292         ixgbe_tx_queue(adapter, tx_ring, tx_flags,
3293                            ixgbe_tx_map(adapter, tx_ring, skb, first),
3294                            skb->len, hdr_len);
3295
3296         netdev->trans_start = jiffies;
3297
3298         ixgbe_maybe_stop_tx(netdev, tx_ring, DESC_NEEDED);
3299
3300         return NETDEV_TX_OK;
3301 }
3302
3303 /**
3304  * ixgbe_get_stats - Get System Network Statistics
3305  * @netdev: network interface device structure
3306  *
3307  * Returns the address of the device statistics structure.
3308  * The statistics are actually updated from the timer callback.
3309  **/
3310 static struct net_device_stats *ixgbe_get_stats(struct net_device *netdev)
3311 {
3312         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3313
3314         /* only return the current stats */
3315         return &adapter->net_stats;
3316 }
3317
3318 /**
3319  * ixgbe_set_mac - Change the Ethernet Address of the NIC
3320  * @netdev: network interface device structure
3321  * @p: pointer to an address structure
3322  *
3323  * Returns 0 on success, negative on failure
3324  **/
3325 static int ixgbe_set_mac(struct net_device *netdev, void *p)
3326 {
3327         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3328         struct sockaddr *addr = p;
3329
3330         if (!is_valid_ether_addr(addr->sa_data))
3331                 return -EADDRNOTAVAIL;
3332
3333         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
3334         memcpy(adapter->hw.mac.addr, addr->sa_data, netdev->addr_len);
3335
3336         ixgbe_set_rar(&adapter->hw, 0, adapter->hw.mac.addr, 0, IXGBE_RAH_AV);
3337
3338         return 0;
3339 }
3340
3341 #ifdef CONFIG_NET_POLL_CONTROLLER
3342 /*
3343  * Polling 'interrupt' - used by things like netconsole to send skbs
3344  * without having to re-enable interrupts. It's not called while
3345  * the interrupt routine is executing.
3346  */
3347 static void ixgbe_netpoll(struct net_device *netdev)
3348 {
3349         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3350
3351         disable_irq(adapter->pdev->irq);
3352         adapter->flags |= IXGBE_FLAG_IN_NETPOLL;
3353         ixgbe_intr(adapter->pdev->irq, netdev);
3354         adapter->flags &= ~IXGBE_FLAG_IN_NETPOLL;
3355         enable_irq(adapter->pdev->irq);
3356 }
3357 #endif
3358
3359 /**
3360  * ixgbe_napi_add_all - prep napi structs for use
3361  * @adapter: private struct
3362  * helper function to napi_add each possible q_vector->napi
3363  */
3364 static void ixgbe_napi_add_all(struct ixgbe_adapter *adapter)
3365 {
3366         int i, q_vectors = adapter->num_msix_vectors - NON_Q_VECTORS;
3367         int (*poll)(struct napi_struct *, int);
3368
3369         if (adapter->flags & IXGBE_FLAG_MSIX_ENABLED) {
3370                 poll = &ixgbe_clean_rxonly;
3371         } else {
3372                 poll = &ixgbe_poll;
3373                 /* only one q_vector for legacy modes */
3374                 q_vectors = 1;
3375         }
3376
3377         for (i = 0; i < q_vectors; i++) {
3378                 struct ixgbe_q_vector *q_vector = &adapter->q_vector[i];
3379                 netif_napi_add(adapter->netdev, &q_vector->napi,
3380                                (*poll), 64);
3381         }
3382 }
3383
3384 /**
3385  * ixgbe_probe - Device Initialization Routine
3386  * @pdev: PCI device information struct
3387  * @ent: entry in ixgbe_pci_tbl
3388  *
3389  * Returns 0 on success, negative on failure
3390  *
3391  * ixgbe_probe initializes an adapter identified by a pci_dev structure.
3392  * The OS initialization, configuring of the adapter private structure,
3393  * and a hardware reset occur.
3394  **/
3395 static int __devinit ixgbe_probe(struct pci_dev *pdev,
3396                                  const struct pci_device_id *ent)
3397 {
3398         struct net_device *netdev;
3399         struct ixgbe_adapter *adapter = NULL;
3400         struct ixgbe_hw *hw;
3401         const struct ixgbe_info *ii = ixgbe_info_tbl[ent->driver_data];
3402         unsigned long mmio_start, mmio_len;
3403         static int cards_found;
3404         int i, err, pci_using_dac;
3405         u16 link_status, link_speed, link_width;
3406         u32 part_num;
3407
3408         err = pci_enable_device(pdev);
3409         if (err)
3410                 return err;
3411
3412         if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK) &&
3413             !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK)) {
3414                 pci_using_dac = 1;
3415         } else {
3416                 err = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
3417                 if (err) {
3418                         err = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
3419                         if (err) {
3420                                 dev_err(&pdev->dev, "No usable DMA "
3421                                         "configuration, aborting\n");
3422                                 goto err_dma;
3423                         }
3424                 }
3425                 pci_using_dac = 0;
3426         }
3427
3428         err = pci_request_regions(pdev, ixgbe_driver_name);
3429         if (err) {
3430                 dev_err(&pdev->dev, "pci_request_regions failed 0x%x\n", err);
3431                 goto err_pci_reg;
3432         }
3433
3434         pci_set_master(pdev);
3435         pci_save_state(pdev);
3436
3437 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3438         netdev = alloc_etherdev_mq(sizeof(struct ixgbe_adapter), MAX_TX_QUEUES);
3439 #else
3440         netdev = alloc_etherdev(sizeof(struct ixgbe_adapter));
3441 #endif
3442         if (!netdev) {
3443                 err = -ENOMEM;
3444                 goto err_alloc_etherdev;
3445         }
3446
3447         SET_NETDEV_DEV(netdev, &pdev->dev);
3448
3449         pci_set_drvdata(pdev, netdev);
3450         adapter = netdev_priv(netdev);
3451
3452         adapter->netdev = netdev;
3453         adapter->pdev = pdev;
3454         hw = &adapter->hw;
3455         hw->back = adapter;
3456         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3457
3458         mmio_start = pci_resource_start(pdev, 0);
3459         mmio_len = pci_resource_len(pdev, 0);
3460
3461         hw->hw_addr = ioremap(mmio_start, mmio_len);
3462         if (!hw->hw_addr) {
3463                 err = -EIO;
3464                 goto err_ioremap;
3465         }
3466
3467         for (i = 1; i <= 5; i++) {
3468                 if (pci_resource_len(pdev, i) == 0)
3469                         continue;
3470         }
3471
3472         netdev->open = &ixgbe_open;
3473         netdev->stop = &ixgbe_close;
3474         netdev->hard_start_xmit = &ixgbe_xmit_frame;
3475         netdev->get_stats = &ixgbe_get_stats;
3476         netdev->set_multicast_list = &ixgbe_set_multi;
3477         netdev->set_mac_address = &ixgbe_set_mac;
3478         netdev->change_mtu = &ixgbe_change_mtu;
3479         ixgbe_set_ethtool_ops(netdev);
3480         netdev->tx_timeout = &ixgbe_tx_timeout;
3481         netdev->watchdog_timeo = 5 * HZ;
3482         netdev->vlan_rx_register = ixgbe_vlan_rx_register;
3483         netdev->vlan_rx_add_vid = ixgbe_vlan_rx_add_vid;
3484         netdev->vlan_rx_kill_vid = ixgbe_vlan_rx_kill_vid;
3485 #ifdef CONFIG_NET_POLL_CONTROLLER
3486         netdev->poll_controller = ixgbe_netpoll;
3487 #endif
3488         strcpy(netdev->name, pci_name(pdev));
3489
3490         netdev->mem_start = mmio_start;
3491         netdev->mem_end = mmio_start + mmio_len;
3492
3493         adapter->bd_number = cards_found;
3494
3495         /* PCI config space info */
3496         hw->vendor_id = pdev->vendor;
3497         hw->device_id = pdev->device;
3498         hw->revision_id = pdev->revision;
3499         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3500         hw->subsystem_device_id = pdev->subsystem_device;
3501
3502         /* Setup hw api */
3503         memcpy(&hw->mac.ops, ii->mac_ops, sizeof(hw->mac.ops));
3504         hw->mac.type  = ii->mac;
3505
3506         err = ii->get_invariants(hw);
3507         if (err)
3508                 goto err_hw_init;
3509
3510         /* setup the private structure */
3511         err = ixgbe_sw_init(adapter);
3512         if (err)
3513                 goto err_sw_init;
3514
3515         netdev->features = NETIF_F_SG |
3516                            NETIF_F_HW_CSUM |
3517                            NETIF_F_HW_VLAN_TX |
3518                            NETIF_F_HW_VLAN_RX |
3519                            NETIF_F_HW_VLAN_FILTER;
3520
3521         netdev->features |= NETIF_F_TSO;
3522
3523         netdev->features |= NETIF_F_TSO6;
3524         if (pci_using_dac)
3525                 netdev->features |= NETIF_F_HIGHDMA;
3526
3527 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3528         netdev->features |= NETIF_F_MULTI_QUEUE;
3529 #endif
3530
3531         /* make sure the EEPROM is good */
3532         if (ixgbe_validate_eeprom_checksum(hw, NULL) < 0) {
3533                 dev_err(&pdev->dev, "The EEPROM Checksum Is Not Valid\n");
3534                 err = -EIO;
3535                 goto err_eeprom;
3536         }
3537
3538         memcpy(netdev->dev_addr, hw->mac.perm_addr, netdev->addr_len);
3539         memcpy(netdev->perm_addr, hw->mac.perm_addr, netdev->addr_len);
3540
3541         if (ixgbe_validate_mac_addr(netdev->dev_addr)) {
3542                 err = -EIO;
3543                 goto err_eeprom;
3544         }
3545
3546         init_timer(&adapter->watchdog_timer);
3547         adapter->watchdog_timer.function = &ixgbe_watchdog;
3548         adapter->watchdog_timer.data = (unsigned long)adapter;
3549
3550         INIT_WORK(&adapter->reset_task, ixgbe_reset_task);
3551
3552         /* initialize default flow control settings */
3553         hw->fc.original_type = ixgbe_fc_full;
3554         hw->fc.type = ixgbe_fc_full;
3555         hw->fc.high_water = IXGBE_DEFAULT_FCRTH;
3556         hw->fc.low_water = IXGBE_DEFAULT_FCRTL;
3557         hw->fc.pause_time = IXGBE_DEFAULT_FCPAUSE;
3558
3559         err = ixgbe_init_interrupt_scheme(adapter);
3560         if (err)
3561                 goto err_sw_init;
3562
3563         /* print bus type/speed/width info */
3564         pci_read_config_word(pdev, IXGBE_PCI_LINK_STATUS, &link_status);
3565         link_speed = link_status & IXGBE_PCI_LINK_SPEED;
3566         link_width = link_status & IXGBE_PCI_LINK_WIDTH;
3567         dev_info(&pdev->dev, "(PCI Express:%s:%s) "
3568                  "%02x:%02x:%02x:%02x:%02x:%02x\n",
3569                 ((link_speed == IXGBE_PCI_LINK_SPEED_5000) ? "5.0Gb/s" :
3570                  (link_speed == IXGBE_PCI_LINK_SPEED_2500) ? "2.5Gb/s" :
3571                  "Unknown"),
3572                 ((link_width == IXGBE_PCI_LINK_WIDTH_8) ? "Width x8" :
3573                  (link_width == IXGBE_PCI_LINK_WIDTH_4) ? "Width x4" :
3574                  (link_width == IXGBE_PCI_LINK_WIDTH_2) ? "Width x2" :
3575                  (link_width == IXGBE_PCI_LINK_WIDTH_1) ? "Width x1" :
3576                  "Unknown"),
3577                 netdev->dev_addr[0], netdev->dev_addr[1], netdev->dev_addr[2],
3578                 netdev->dev_addr[3], netdev->dev_addr[4], netdev->dev_addr[5]);
3579         ixgbe_read_part_num(hw, &part_num);
3580         dev_info(&pdev->dev, "MAC: %d, PHY: %d, PBA No: %06x-%03x\n",
3581                  hw->mac.type, hw->phy.type,
3582                  (part_num >> 8), (part_num & 0xff));
3583
3584         if (link_width <= IXGBE_PCI_LINK_WIDTH_4) {
3585                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for "
3586                          "this card is not sufficient for optimal "
3587                          "performance.\n");
3588                 dev_warn(&pdev->dev, "For optimal performance a x8 "
3589                          "PCI-Express slot is required.\n");
3590         }
3591
3592         /* reset the hardware with the new settings */
3593         ixgbe_start_hw(hw);
3594
3595         netif_carrier_off(netdev);
3596         netif_stop_queue(netdev);
3597 #ifdef CONFIG_NETDEVICES_MULTIQUEUE
3598         for (i = 0; i < adapter->num_tx_queues; i++)
3599                 netif_stop_subqueue(netdev, i);
3600 #endif
3601
3602         ixgbe_napi_add_all(adapter);
3603
3604         strcpy(netdev->name, "eth%d");
3605         err = register_netdev(netdev);
3606         if (err)
3607                 goto err_register;
3608
3609 #ifdef CONFIG_DCA
3610         if (dca_add_requester(&pdev->dev) == 0) {
3611                 adapter->flags |= IXGBE_FLAG_DCA_ENABLED;
3612                 /* always use CB2 mode, difference is masked
3613                  * in the CB driver */
3614                 IXGBE_WRITE_REG(hw, IXGBE_DCA_CTRL, 2);
3615                 ixgbe_setup_dca(adapter);
3616         }
3617 #endif
3618
3619         dev_info(&pdev->dev, "Intel(R) 10 Gigabit Network Connection\n");
3620         cards_found++;
3621         return 0;
3622
3623 err_register:
3624         ixgbe_release_hw_control(adapter);
3625 err_hw_init:
3626 err_sw_init:
3627         ixgbe_reset_interrupt_capability(adapter);
3628 err_eeprom:
3629         iounmap(hw->hw_addr);
3630 err_ioremap:
3631         free_netdev(netdev);
3632 err_alloc_etherdev:
3633         pci_release_regions(pdev);
3634 err_pci_reg:
3635 err_dma:
3636         pci_disable_device(pdev);
3637         return err;
3638 }
3639
3640 /**
3641  * ixgbe_remove - Device Removal Routine
3642  * @pdev: PCI device information struct
3643  *
3644  * ixgbe_remove is called by the PCI subsystem to alert the driver
3645  * that it should release a PCI device.  The could be caused by a
3646  * Hot-Plug event, or because the driver is going to be removed from
3647  * memory.
3648  **/
3649 static void __devexit ixgbe_remove(struct pci_dev *pdev)
3650 {
3651         struct net_device *netdev = pci_get_drvdata(pdev);
3652         struct ixgbe_adapter *adapter = netdev_priv(netdev);
3653
3654         set_bit(__IXGBE_DOWN, &adapter->state);
3655         del_timer_sync(&adapter->watchdog_timer);
3656
3657         flush_scheduled_work();
3658
3659 #ifdef CONFIG_DCA
3660         if (adapter->flags & IXGBE_FLAG_DCA_ENABLED) {
3661                 adapter->flags &= ~IXGBE_FLAG_DCA_ENABLED;
3662                 dca_remove_requester(&pdev->dev);
3663                 IXGBE_WRITE_REG(&adapter->hw, IXGBE_DCA_CTRL, 1);
3664         }
3665
3666 #endif
3667         unregister_netdev(netdev);
3668
3669         ixgbe_reset_interrupt_capability(adapter);
3670
3671         ixgbe_release_hw_control(adapter);
3672
3673         iounmap(adapter->hw.hw_addr);
3674         pci_release_regions(pdev);
3675
3676         DPRINTK(PROBE, INFO, "complete\n");
3677         kfree(adapter->tx_ring);
3678         kfree(adapter->rx_ring);
3679
3680         free_netdev(netdev);
3681
3682         pci_disable_device(pdev);
3683 }
3684
3685 /**
3686  * ixgbe_io_error_detected - called when PCI error is detected
3687  * @pdev: Pointer to PCI device
3688  * @state: The current pci connection state
3689  *
3690  * This function is called after a PCI bus error affecting
3691  * this device has been detected.
3692  */
3693 static pci_ers_result_t ixgbe_io_error_detected(struct pci_dev *pdev,
3694                                                 pci_channel_state_t state)
3695 {
3696         struct net_device *netdev = pci_get_drvdata(pdev);
3697         struct ixgbe_adapter *adapter = netdev->priv;
3698
3699         netif_device_detach(netdev);
3700
3701         if (netif_running(netdev))
3702                 ixgbe_down(adapter);
3703         pci_disable_device(pdev);
3704
3705         /* Request a slot slot reset. */
3706         return PCI_ERS_RESULT_NEED_RESET;
3707 }
3708
3709 /**
3710  * ixgbe_io_slot_reset - called after the pci bus has been reset.
3711  * @pdev: Pointer to PCI device
3712  *
3713  * Restart the card from scratch, as if from a cold-boot.
3714  */
3715 static pci_ers_result_t ixgbe_io_slot_reset(struct pci_dev *pdev)
3716 {
3717         struct net_device *netdev = pci_get_drvdata(pdev);
3718         struct ixgbe_adapter *adapter = netdev->priv;
3719
3720         if (pci_enable_device(pdev)) {
3721                 DPRINTK(PROBE, ERR,
3722                         "Cannot re-enable PCI device after reset.\n");
3723                 return PCI_ERS_RESULT_DISCONNECT;
3724         }
3725         pci_set_master(pdev);
3726         pci_restore_state(pdev);
3727
3728         pci_enable_wake(pdev, PCI_D3hot, 0);
3729         pci_enable_wake(pdev, PCI_D3cold, 0);
3730
3731         ixgbe_reset(adapter);
3732
3733         return PCI_ERS_RESULT_RECOVERED;
3734 }
3735
3736 /**
3737  * ixgbe_io_resume - called when traffic can start flowing again.
3738  * @pdev: Pointer to PCI device
3739  *
3740  * This callback is called when the error recovery driver tells us that
3741  * its OK to resume normal operation.
3742  */
3743 static void ixgbe_io_resume(struct pci_dev *pdev)
3744 {
3745         struct net_device *netdev = pci_get_drvdata(pdev);
3746         struct ixgbe_adapter *adapter = netdev->priv;
3747
3748         if (netif_running(netdev)) {
3749                 if (ixgbe_up(adapter)) {
3750                         DPRINTK(PROBE, INFO, "ixgbe_up failed after reset\n");
3751                         return;
3752                 }
3753         }
3754
3755         netif_device_attach(netdev);
3756
3757 }
3758
3759 static struct pci_error_handlers ixgbe_err_handler = {
3760         .error_detected = ixgbe_io_error_detected,
3761         .slot_reset = ixgbe_io_slot_reset,
3762         .resume = ixgbe_io_resume,
3763 };
3764
3765 static struct pci_driver ixgbe_driver = {
3766         .name     = ixgbe_driver_name,
3767         .id_table = ixgbe_pci_tbl,
3768         .probe    = ixgbe_probe,
3769         .remove   = __devexit_p(ixgbe_remove),
3770 #ifdef CONFIG_PM
3771         .suspend  = ixgbe_suspend,
3772         .resume   = ixgbe_resume,
3773 #endif
3774         .shutdown = ixgbe_shutdown,
3775         .err_handler = &ixgbe_err_handler
3776 };
3777
3778 /**
3779  * ixgbe_init_module - Driver Registration Routine
3780  *
3781  * ixgbe_init_module is the first routine called when the driver is
3782  * loaded. All it does is register with the PCI subsystem.
3783  **/
3784 static int __init ixgbe_init_module(void)
3785 {
3786         int ret;
3787         printk(KERN_INFO "%s: %s - version %s\n", ixgbe_driver_name,
3788                ixgbe_driver_string, ixgbe_driver_version);
3789
3790         printk(KERN_INFO "%s: %s\n", ixgbe_driver_name, ixgbe_copyright);
3791
3792 #ifdef CONFIG_DCA
3793         dca_register_notify(&dca_notifier);
3794
3795 #endif
3796         ret = pci_register_driver(&ixgbe_driver);
3797         return ret;
3798 }
3799 module_init(ixgbe_init_module);
3800
3801 /**
3802  * ixgbe_exit_module - Driver Exit Cleanup Routine
3803  *
3804  * ixgbe_exit_module is called just before the driver is removed
3805  * from memory.
3806  **/
3807 static void __exit ixgbe_exit_module(void)
3808 {
3809 #ifdef CONFIG_DCA
3810         dca_unregister_notify(&dca_notifier);
3811 #endif
3812         pci_unregister_driver(&ixgbe_driver);
3813 }
3814
3815 #ifdef CONFIG_DCA
3816 static int ixgbe_notify_dca(struct notifier_block *nb, unsigned long event,
3817                             void *p)
3818 {
3819         int ret_val;
3820
3821         ret_val = driver_for_each_device(&ixgbe_driver.driver, NULL, &event,
3822                                          __ixgbe_notify_dca);
3823
3824         return ret_val ? NOTIFY_BAD : NOTIFY_DONE;
3825 }
3826 #endif /* CONFIG_DCA */
3827
3828 module_exit(ixgbe_exit_module);
3829
3830 /* ixgbe_main.c */