drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/pci.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/if_ether.h>
  32 #include <linux/if_vlan.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/tcp.h>
  38 #include <linux/rtnetlink.h>
  39 #include <linux/prefetch.h>
  40 #include <net/ip6_checksum.h>
  41
  42 #include "cq_enet_desc.h"
  43 #include "vnic_dev.h"
  44 #include "vnic_intr.h"
  45 #include "vnic_stats.h"
  46 #include "vnic_vic.h"
  47 #include "enic_res.h"
  48 #include "enic.h"
  49 #include "enic_dev.h"
  50 #include "enic_pp.h"
  51
  52 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  53 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  54 #define MAX_TSO                         (1 << 16)
  55 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  56
  57 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  58 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  59
  60 /* Supported devices */
  61 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  62         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  63         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  64         { 0, }  /* end of table */
  65 };
  66
  67 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  68 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  69 MODULE_LICENSE("GPL");
  70 MODULE_VERSION(DRV_VERSION);
  71 MODULE_DEVICE_TABLE(pci, enic_id_table);
  72
  73 struct enic_stat {
  74         char name[ETH_GSTRING_LEN];
  75         unsigned int offset;
  76 };
  77
  78 #define ENIC_TX_STAT(stat)      \
  79         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  80 #define ENIC_RX_STAT(stat)      \
  81         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  82
  83 static const struct enic_stat enic_tx_stats[] = {
  84         ENIC_TX_STAT(tx_frames_ok),
  85         ENIC_TX_STAT(tx_unicast_frames_ok),
  86         ENIC_TX_STAT(tx_multicast_frames_ok),
  87         ENIC_TX_STAT(tx_broadcast_frames_ok),
  88         ENIC_TX_STAT(tx_bytes_ok),
  89         ENIC_TX_STAT(tx_unicast_bytes_ok),
  90         ENIC_TX_STAT(tx_multicast_bytes_ok),
  91         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  92         ENIC_TX_STAT(tx_drops),
  93         ENIC_TX_STAT(tx_errors),
  94         ENIC_TX_STAT(tx_tso),
  95 };
  96
  97 static const struct enic_stat enic_rx_stats[] = {
  98         ENIC_RX_STAT(rx_frames_ok),
  99         ENIC_RX_STAT(rx_frames_total),
 100         ENIC_RX_STAT(rx_unicast_frames_ok),
 101         ENIC_RX_STAT(rx_multicast_frames_ok),
 102         ENIC_RX_STAT(rx_broadcast_frames_ok),
 103         ENIC_RX_STAT(rx_bytes_ok),
 104         ENIC_RX_STAT(rx_unicast_bytes_ok),
 105         ENIC_RX_STAT(rx_multicast_bytes_ok),
 106         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 107         ENIC_RX_STAT(rx_drop),
 108         ENIC_RX_STAT(rx_no_bufs),
 109         ENIC_RX_STAT(rx_errors),
 110         ENIC_RX_STAT(rx_rss),
 111         ENIC_RX_STAT(rx_crc_errors),
 112         ENIC_RX_STAT(rx_frames_64),
 113         ENIC_RX_STAT(rx_frames_127),
 114         ENIC_RX_STAT(rx_frames_255),
 115         ENIC_RX_STAT(rx_frames_511),
 116         ENIC_RX_STAT(rx_frames_1023),
 117         ENIC_RX_STAT(rx_frames_1518),
 118         ENIC_RX_STAT(rx_frames_to_max),
 119 };
 120
 121 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 122 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 123
 124 static int enic_is_dynamic(struct enic *enic)
 125 {
 126         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 127 }
 128
 129 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 130 {
 131         return rq;
 132 }
 133
 134 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 135 {
 136         return enic->rq_count + wq;
 137 }
 138
 139 static inline unsigned int enic_legacy_io_intr(void)
 140 {
 141         return 0;
 142 }
 143
 144 static inline unsigned int enic_legacy_err_intr(void)
 145 {
 146         return 1;
 147 }
 148
 149 static inline unsigned int enic_legacy_notify_intr(void)
 150 {
 151         return 2;
 152 }
 153
 154 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 155 {
 156         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 157 }
 158
 159 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 160 {
 161         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 162 }
 163
 164 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 165 {
 166         return enic->rq_count + enic->wq_count;
 167 }
 168
 169 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 170 {
 171         return enic->rq_count + enic->wq_count + 1;
 172 }
 173
 174 static int enic_get_settings(struct net_device *netdev,
 175         struct ethtool_cmd *ecmd)
 176 {
 177         struct enic *enic = netdev_priv(netdev);
 178
 179         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 180         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 181         ecmd->port = PORT_FIBRE;
 182         ecmd->transceiver = XCVR_EXTERNAL;
 183
 184         if (netif_carrier_ok(netdev)) {
 185                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 186                 ecmd->duplex = DUPLEX_FULL;
 187         } else {
 188                 ethtool_cmd_speed_set(ecmd, -1);
 189                 ecmd->duplex = -1;
 190         }
 191
 192         ecmd->autoneg = AUTONEG_DISABLE;
 193
 194         return 0;
 195 }
 196
 197 static void enic_get_drvinfo(struct net_device *netdev,
 198         struct ethtool_drvinfo *drvinfo)
 199 {
 200         struct enic *enic = netdev_priv(netdev);
 201         struct vnic_devcmd_fw_info *fw_info;
 202
 203         enic_dev_fw_info(enic, &fw_info);
 204
 205         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 206         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 207         strncpy(drvinfo->fw_version, fw_info->fw_version,
 208                 sizeof(drvinfo->fw_version));
 209         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 210                 sizeof(drvinfo->bus_info));
 211 }
 212
 213 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 214 {
 215         unsigned int i;
 216
 217         switch (stringset) {
 218         case ETH_SS_STATS:
 219                 for (i = 0; i < enic_n_tx_stats; i++) {
 220                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 221                         data += ETH_GSTRING_LEN;
 222                 }
 223                 for (i = 0; i < enic_n_rx_stats; i++) {
 224                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 225                         data += ETH_GSTRING_LEN;
 226                 }
 227                 break;
 228         }
 229 }
 230
 231 static int enic_get_sset_count(struct net_device *netdev, int sset)
 232 {
 233         switch (sset) {
 234         case ETH_SS_STATS:
 235                 return enic_n_tx_stats + enic_n_rx_stats;
 236         default:
 237                 return -EOPNOTSUPP;
 238         }
 239 }
 240
 241 static void enic_get_ethtool_stats(struct net_device *netdev,
 242         struct ethtool_stats *stats, u64 *data)
 243 {
 244         struct enic *enic = netdev_priv(netdev);
 245         struct vnic_stats *vstats;
 246         unsigned int i;
 247
 248         enic_dev_stats_dump(enic, &vstats);
 249
 250         for (i = 0; i < enic_n_tx_stats; i++)
 251                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 252         for (i = 0; i < enic_n_rx_stats; i++)
 253                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 254 }
 255
 256 static u32 enic_get_msglevel(struct net_device *netdev)
 257 {
 258         struct enic *enic = netdev_priv(netdev);
 259         return enic->msg_enable;
 260 }
 261
 262 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 263 {
 264         struct enic *enic = netdev_priv(netdev);
 265         enic->msg_enable = value;
 266 }
 267
 268 static int enic_get_coalesce(struct net_device *netdev,
 269         struct ethtool_coalesce *ecmd)
 270 {
 271         struct enic *enic = netdev_priv(netdev);
 272
 273         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 274         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 275
 276         return 0;
 277 }
 278
 279 static int enic_set_coalesce(struct net_device *netdev,
 280         struct ethtool_coalesce *ecmd)
 281 {
 282         struct enic *enic = netdev_priv(netdev);
 283         u32 tx_coalesce_usecs;
 284         u32 rx_coalesce_usecs;
 285         unsigned int i, intr;
 286
 287         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 288                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 289         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 290                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 291
 292         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 293         case VNIC_DEV_INTR_MODE_INTX:
 294                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 295                         return -EINVAL;
 296
 297                 intr = enic_legacy_io_intr();
 298                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 299                         tx_coalesce_usecs);
 300                 break;
 301         case VNIC_DEV_INTR_MODE_MSI:
 302                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 303                         return -EINVAL;
 304
 305                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 306                         tx_coalesce_usecs);
 307                 break;
 308         case VNIC_DEV_INTR_MODE_MSIX:
 309                 for (i = 0; i < enic->wq_count; i++) {
 310                         intr = enic_msix_wq_intr(enic, i);
 311                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 312                                 tx_coalesce_usecs);
 313                 }
 314
 315                 for (i = 0; i < enic->rq_count; i++) {
 316                         intr = enic_msix_rq_intr(enic, i);
 317                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 318                                 rx_coalesce_usecs);
 319                 }
 320
 321                 break;
 322         default:
 323                 break;
 324         }
 325
 326         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 327         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 328
 329         return 0;
 330 }
 331
 332 static const struct ethtool_ops enic_ethtool_ops = {
 333         .get_settings = enic_get_settings,
 334         .get_drvinfo = enic_get_drvinfo,
 335         .get_msglevel = enic_get_msglevel,
 336         .set_msglevel = enic_set_msglevel,
 337         .get_link = ethtool_op_get_link,
 338         .get_strings = enic_get_strings,
 339         .get_sset_count = enic_get_sset_count,
 340         .get_ethtool_stats = enic_get_ethtool_stats,
 341         .get_coalesce = enic_get_coalesce,
 342         .set_coalesce = enic_set_coalesce,
 343 };
 344
 345 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 346 {
 347         struct enic *enic = vnic_dev_priv(wq->vdev);
 348
 349         if (buf->sop)
 350                 pci_unmap_single(enic->pdev, buf->dma_addr,
 351                         buf->len, PCI_DMA_TODEVICE);
 352         else
 353                 pci_unmap_page(enic->pdev, buf->dma_addr,
 354                         buf->len, PCI_DMA_TODEVICE);
 355
 356         if (buf->os_buf)
 357                 dev_kfree_skb_any(buf->os_buf);
 358 }
 359
 360 static void enic_wq_free_buf(struct vnic_wq *wq,
 361         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 362 {
 363         enic_free_wq_buf(wq, buf);
 364 }
 365
 366 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 367         u8 type, u16 q_number, u16 completed_index, void *opaque)
 368 {
 369         struct enic *enic = vnic_dev_priv(vdev);
 370
 371         spin_lock(&enic->wq_lock[q_number]);
 372
 373         vnic_wq_service(&enic->wq[q_number], cq_desc,
 374                 completed_index, enic_wq_free_buf,
 375                 opaque);
 376
 377         if (netif_queue_stopped(enic->netdev) &&
 378             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 379             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 380                 netif_wake_queue(enic->netdev);
 381
 382         spin_unlock(&enic->wq_lock[q_number]);
 383
 384         return 0;
 385 }
 386
 387 static void enic_log_q_error(struct enic *enic)
 388 {
 389         unsigned int i;
 390         u32 error_status;
 391
 392         for (i = 0; i < enic->wq_count; i++) {
 393                 error_status = vnic_wq_error_status(&enic->wq[i]);
 394                 if (error_status)
 395                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 396                                 i, error_status);
 397         }
 398
 399         for (i = 0; i < enic->rq_count; i++) {
 400                 error_status = vnic_rq_error_status(&enic->rq[i]);
 401                 if (error_status)
 402                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 403                                 i, error_status);
 404         }
 405 }
 406
 407 static void enic_msglvl_check(struct enic *enic)
 408 {
 409         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 410
 411         if (msg_enable != enic->msg_enable) {
 412                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 413                         enic->msg_enable, msg_enable);
 414                 enic->msg_enable = msg_enable;
 415         }
 416 }
 417
 418 static void enic_mtu_check(struct enic *enic)
 419 {
 420         u32 mtu = vnic_dev_mtu(enic->vdev);
 421         struct net_device *netdev = enic->netdev;
 422
 423         if (mtu && mtu != enic->port_mtu) {
 424                 enic->port_mtu = mtu;
 425                 if (enic_is_dynamic(enic)) {
 426                         mtu = max_t(int, ENIC_MIN_MTU,
 427                                 min_t(int, ENIC_MAX_MTU, mtu));
 428                         if (mtu != netdev->mtu)
 429                                 schedule_work(&enic->change_mtu_work);
 430                 } else {
 431                         if (mtu < netdev->mtu)
 432                                 netdev_warn(netdev,
 433                                         "interface MTU (%d) set higher "
 434                                         "than switch port MTU (%d)\n",
 435                                         netdev->mtu, mtu);
 436                 }
 437         }
 438 }
 439
 440 static void enic_link_check(struct enic *enic)
 441 {
 442         int link_status = vnic_dev_link_status(enic->vdev);
 443         int carrier_ok = netif_carrier_ok(enic->netdev);
 444
 445         if (link_status && !carrier_ok) {
 446                 netdev_info(enic->netdev, "Link UP\n");
 447                 netif_carrier_on(enic->netdev);
 448         } else if (!link_status && carrier_ok) {
 449                 netdev_info(enic->netdev, "Link DOWN\n");
 450                 netif_carrier_off(enic->netdev);
 451         }
 452 }
 453
 454 static void enic_notify_check(struct enic *enic)
 455 {
 456         enic_msglvl_check(enic);
 457         enic_mtu_check(enic);
 458         enic_link_check(enic);
 459 }
 460
 461 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 462
 463 static irqreturn_t enic_isr_legacy(int irq, void *data)
 464 {
 465         struct net_device *netdev = data;
 466         struct enic *enic = netdev_priv(netdev);
 467         unsigned int io_intr = enic_legacy_io_intr();
 468         unsigned int err_intr = enic_legacy_err_intr();
 469         unsigned int notify_intr = enic_legacy_notify_intr();
 470         u32 pba;
 471
 472         vnic_intr_mask(&enic->intr[io_intr]);
 473
 474         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 475         if (!pba) {
 476                 vnic_intr_unmask(&enic->intr[io_intr]);
 477                 return IRQ_NONE;        /* not our interrupt */
 478         }
 479
 480         if (ENIC_TEST_INTR(pba, notify_intr)) {
 481                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 482                 enic_notify_check(enic);
 483         }
 484
 485         if (ENIC_TEST_INTR(pba, err_intr)) {
 486                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 487                 enic_log_q_error(enic);
 488                 /* schedule recovery from WQ/RQ error */
 489                 schedule_work(&enic->reset);
 490                 return IRQ_HANDLED;
 491         }
 492
 493         if (ENIC_TEST_INTR(pba, io_intr)) {
 494                 if (napi_schedule_prep(&enic->napi[0]))
 495                         __napi_schedule(&enic->napi[0]);
 496         } else {
 497                 vnic_intr_unmask(&enic->intr[io_intr]);
 498         }
 499
 500         return IRQ_HANDLED;
 501 }
 502
 503 static irqreturn_t enic_isr_msi(int irq, void *data)
 504 {
 505         struct enic *enic = data;
 506
 507         /* With MSI, there is no sharing of interrupts, so this is
 508          * our interrupt and there is no need to ack it.  The device
 509          * is not providing per-vector masking, so the OS will not
 510          * write to PCI config space to mask/unmask the interrupt.
 511          * We're using mask_on_assertion for MSI, so the device
 512          * automatically masks the interrupt when the interrupt is
 513          * generated.  Later, when exiting polling, the interrupt
 514          * will be unmasked (see enic_poll).
 515          *
 516          * Also, the device uses the same PCIe Traffic Class (TC)
 517          * for Memory Write data and MSI, so there are no ordering
 518          * issues; the MSI will always arrive at the Root Complex
 519          * _after_ corresponding Memory Writes (i.e. descriptor
 520          * writes).
 521          */
 522
 523         napi_schedule(&enic->napi[0]);
 524
 525         return IRQ_HANDLED;
 526 }
 527
 528 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 529 {
 530         struct napi_struct *napi = data;
 531
 532         /* schedule NAPI polling for RQ cleanup */
 533         napi_schedule(napi);
 534
 535         return IRQ_HANDLED;
 536 }
 537
 538 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 539 {
 540         struct enic *enic = data;
 541         unsigned int cq = enic_cq_wq(enic, 0);
 542         unsigned int intr = enic_msix_wq_intr(enic, 0);
 543         unsigned int wq_work_to_do = -1; /* no limit */
 544         unsigned int wq_work_done;
 545
 546         wq_work_done = vnic_cq_service(&enic->cq[cq],
 547                 wq_work_to_do, enic_wq_service, NULL);
 548
 549         vnic_intr_return_credits(&enic->intr[intr],
 550                 wq_work_done,
 551                 1 /* unmask intr */,
 552                 1 /* reset intr timer */);
 553
 554         return IRQ_HANDLED;
 555 }
 556
 557 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 558 {
 559         struct enic *enic = data;
 560         unsigned int intr = enic_msix_err_intr(enic);
 561
 562         vnic_intr_return_all_credits(&enic->intr[intr]);
 563
 564         enic_log_q_error(enic);
 565
 566         /* schedule recovery from WQ/RQ error */
 567         schedule_work(&enic->reset);
 568
 569         return IRQ_HANDLED;
 570 }
 571
 572 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 573 {
 574         struct enic *enic = data;
 575         unsigned int intr = enic_msix_notify_intr(enic);
 576
 577         vnic_intr_return_all_credits(&enic->intr[intr]);
 578         enic_notify_check(enic);
 579
 580         return IRQ_HANDLED;
 581 }
 582
 583 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 584         struct vnic_wq *wq, struct sk_buff *skb,
 585         unsigned int len_left, int loopback)
 586 {
 587         skb_frag_t *frag;
 588
 589         /* Queue additional data fragments */
 590         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 591                 len_left -= frag->size;
 592                 enic_queue_wq_desc_cont(wq, skb,
 593                         pci_map_page(enic->pdev, frag->page,
 594                                 frag->page_offset, frag->size,
 595                                 PCI_DMA_TODEVICE),
 596                         frag->size,
 597                         (len_left == 0),        /* EOP? */
 598                         loopback);
 599         }
 600 }
 601
 602 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 603         struct vnic_wq *wq, struct sk_buff *skb,
 604         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 605 {
 606         unsigned int head_len = skb_headlen(skb);
 607         unsigned int len_left = skb->len - head_len;
 608         int eop = (len_left == 0);
 609
 610         /* Queue the main skb fragment. The fragments are no larger
 611          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 612          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 613          * per fragment is queued.
 614          */
 615         enic_queue_wq_desc(wq, skb,
 616                 pci_map_single(enic->pdev, skb->data,
 617                         head_len, PCI_DMA_TODEVICE),
 618                 head_len,
 619                 vlan_tag_insert, vlan_tag,
 620                 eop, loopback);
 621
 622         if (!eop)
 623                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 624 }
 625
 626 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 627         struct vnic_wq *wq, struct sk_buff *skb,
 628         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 629 {
 630         unsigned int head_len = skb_headlen(skb);
 631         unsigned int len_left = skb->len - head_len;
 632         unsigned int hdr_len = skb_checksum_start_offset(skb);
 633         unsigned int csum_offset = hdr_len + skb->csum_offset;
 634         int eop = (len_left == 0);
 635
 636         /* Queue the main skb fragment. The fragments are no larger
 637          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 638          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 639          * per fragment is queued.
 640          */
 641         enic_queue_wq_desc_csum_l4(wq, skb,
 642                 pci_map_single(enic->pdev, skb->data,
 643                         head_len, PCI_DMA_TODEVICE),
 644                 head_len,
 645                 csum_offset,
 646                 hdr_len,
 647                 vlan_tag_insert, vlan_tag,
 648                 eop, loopback);
 649
 650         if (!eop)
 651                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 652 }
 653
 654 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 655         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 656         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 657 {
 658         unsigned int frag_len_left = skb_headlen(skb);
 659         unsigned int len_left = skb->len - frag_len_left;
 660         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 661         int eop = (len_left == 0);
 662         unsigned int len;
 663         dma_addr_t dma_addr;
 664         unsigned int offset = 0;
 665         skb_frag_t *frag;
 666
 667         /* Preload TCP csum field with IP pseudo hdr calculated
 668          * with IP length set to zero.  HW will later add in length
 669          * to each TCP segment resulting from the TSO.
 670          */
 671
 672         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 673                 ip_hdr(skb)->check = 0;
 674                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 675                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 676         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 677                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 678                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 679         }
 680
 681         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 682          * for the main skb fragment
 683          */
 684         while (frag_len_left) {
 685                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 686                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 687                                 len, PCI_DMA_TODEVICE);
 688                 enic_queue_wq_desc_tso(wq, skb,
 689                         dma_addr,
 690                         len,
 691                         mss, hdr_len,
 692                         vlan_tag_insert, vlan_tag,
 693                         eop && (len == frag_len_left), loopback);
 694                 frag_len_left -= len;
 695                 offset += len;
 696         }
 697
 698         if (eop)
 699                 return;
 700
 701         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 702          * for additional data fragments
 703          */
 704         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 705                 len_left -= frag->size;
 706                 frag_len_left = frag->size;
 707                 offset = frag->page_offset;
 708
 709                 while (frag_len_left) {
 710                         len = min(frag_len_left,
 711                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 712                         dma_addr = pci_map_page(enic->pdev, frag->page,
 713                                 offset, len,
 714                                 PCI_DMA_TODEVICE);
 715                         enic_queue_wq_desc_cont(wq, skb,
 716                                 dma_addr,
 717                                 len,
 718                                 (len_left == 0) &&
 719                                 (len == frag_len_left),         /* EOP? */
 720                                 loopback);
 721                         frag_len_left -= len;
 722                         offset += len;
 723                 }
 724         }
 725 }
 726
 727 static inline void enic_queue_wq_skb(struct enic *enic,
 728         struct vnic_wq *wq, struct sk_buff *skb)
 729 {
 730         unsigned int mss = skb_shinfo(skb)->gso_size;
 731         unsigned int vlan_tag = 0;
 732         int vlan_tag_insert = 0;
 733         int loopback = 0;
 734
 735         if (vlan_tx_tag_present(skb)) {
 736                 /* VLAN tag from trunking driver */
 737                 vlan_tag_insert = 1;
 738                 vlan_tag = vlan_tx_tag_get(skb);
 739         } else if (enic->loop_enable) {
 740                 vlan_tag = enic->loop_tag;
 741                 loopback = 1;
 742         }
 743
 744         if (mss)
 745                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 746                         vlan_tag_insert, vlan_tag, loopback);
 747         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 748                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 749                         vlan_tag_insert, vlan_tag, loopback);
 750         else
 751                 enic_queue_wq_skb_vlan(enic, wq, skb,
 752                         vlan_tag_insert, vlan_tag, loopback);
 753 }
 754
 755 /* netif_tx_lock held, process context with BHs disabled, or BH */
 756 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 757         struct net_device *netdev)
 758 {
 759         struct enic *enic = netdev_priv(netdev);
 760         struct vnic_wq *wq = &enic->wq[0];
 761         unsigned long flags;
 762
 763         if (skb->len <= 0) {
 764                 dev_kfree_skb(skb);
 765                 return NETDEV_TX_OK;
 766         }
 767
 768         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 769          * which is very likely.  In the off chance it's going to take
 770          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 771          */
 772
 773         if (skb_shinfo(skb)->gso_size == 0 &&
 774             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 775             skb_linearize(skb)) {
 776                 dev_kfree_skb(skb);
 777                 return NETDEV_TX_OK;
 778         }
 779
 780         spin_lock_irqsave(&enic->wq_lock[0], flags);
 781
 782         if (vnic_wq_desc_avail(wq) <
 783             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 784                 netif_stop_queue(netdev);
 785                 /* This is a hard error, log it */
 786                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 787                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 788                 return NETDEV_TX_BUSY;
 789         }
 790
 791         enic_queue_wq_skb(enic, wq, skb);
 792
 793         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 794                 netif_stop_queue(netdev);
 795
 796         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 797
 798         return NETDEV_TX_OK;
 799 }
 800
 801 /* dev_base_lock rwlock held, nominally process context */
 802 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 803                                                 struct rtnl_link_stats64 *net_stats)
 804 {
 805         struct enic *enic = netdev_priv(netdev);
 806         struct vnic_stats *stats;
 807
 808         enic_dev_stats_dump(enic, &stats);
 809
 810         net_stats->tx_packets = stats->tx.tx_frames_ok;
 811         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 812         net_stats->tx_errors = stats->tx.tx_errors;
 813         net_stats->tx_dropped = stats->tx.tx_drops;
 814
 815         net_stats->rx_packets = stats->rx.rx_frames_ok;
 816         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 817         net_stats->rx_errors = stats->rx.rx_errors;
 818         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 819         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 820         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 821         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 822
 823         return net_stats;
 824 }
 825
 826 void enic_reset_addr_lists(struct enic *enic)
 827 {
 828         enic->mc_count = 0;
 829         enic->uc_count = 0;
 830         enic->flags = 0;
 831 }
 832
 833 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 834 {
 835         struct enic *enic = netdev_priv(netdev);
 836
 837         if (enic_is_dynamic(enic)) {
 838                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 839                         return -EADDRNOTAVAIL;
 840         } else {
 841                 if (!is_valid_ether_addr(addr))
 842                         return -EADDRNOTAVAIL;
 843         }
 844
 845         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 846
 847         return 0;
 848 }
 849
 850 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 851 {
 852         struct enic *enic = netdev_priv(netdev);
 853         struct sockaddr *saddr = p;
 854         char *addr = saddr->sa_data;
 855         int err;
 856
 857         if (netif_running(enic->netdev)) {
 858                 err = enic_dev_del_station_addr(enic);
 859                 if (err)
 860                         return err;
 861         }
 862
 863         err = enic_set_mac_addr(netdev, addr);
 864         if (err)
 865                 return err;
 866
 867         if (netif_running(enic->netdev)) {
 868                 err = enic_dev_add_station_addr(enic);
 869                 if (err)
 870                         return err;
 871         }
 872
 873         return err;
 874 }
 875
 876 static int enic_set_mac_address(struct net_device *netdev, void *p)
 877 {
 878         struct sockaddr *saddr = p;
 879         char *addr = saddr->sa_data;
 880         struct enic *enic = netdev_priv(netdev);
 881         int err;
 882
 883         err = enic_dev_del_station_addr(enic);
 884         if (err)
 885                 return err;
 886
 887         err = enic_set_mac_addr(netdev, addr);
 888         if (err)
 889                 return err;
 890
 891         return enic_dev_add_station_addr(enic);
 892 }
 893
 894 static void enic_update_multicast_addr_list(struct enic *enic)
 895 {
 896         struct net_device *netdev = enic->netdev;
 897         struct netdev_hw_addr *ha;
 898         unsigned int mc_count = netdev_mc_count(netdev);
 899         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 900         unsigned int i, j;
 901
 902         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 903                 netdev_warn(netdev, "Registering only %d out of %d "
 904                         "multicast addresses\n",
 905                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 906                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 907         }
 908
 909         /* Is there an easier way?  Trying to minimize to
 910          * calls to add/del multicast addrs.  We keep the
 911          * addrs from the last call in enic->mc_addr and
 912          * look for changes to add/del.
 913          */
 914
 915         i = 0;
 916         netdev_for_each_mc_addr(ha, netdev) {
 917                 if (i == mc_count)
 918                         break;
 919                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 920         }
 921
 922         for (i = 0; i < enic->mc_count; i++) {
 923                 for (j = 0; j < mc_count; j++)
 924                         if (compare_ether_addr(enic->mc_addr[i],
 925                                 mc_addr[j]) == 0)
 926                                 break;
 927                 if (j == mc_count)
 928                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 929         }
 930
 931         for (i = 0; i < mc_count; i++) {
 932                 for (j = 0; j < enic->mc_count; j++)
 933                         if (compare_ether_addr(mc_addr[i],
 934                                 enic->mc_addr[j]) == 0)
 935                                 break;
 936                 if (j == enic->mc_count)
 937                         enic_dev_add_addr(enic, mc_addr[i]);
 938         }
 939
 940         /* Save the list to compare against next time
 941          */
 942
 943         for (i = 0; i < mc_count; i++)
 944                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 945
 946         enic->mc_count = mc_count;
 947 }
 948
 949 static void enic_update_unicast_addr_list(struct enic *enic)
 950 {
 951         struct net_device *netdev = enic->netdev;
 952         struct netdev_hw_addr *ha;
 953         unsigned int uc_count = netdev_uc_count(netdev);
 954         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 955         unsigned int i, j;
 956
 957         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 958                 netdev_warn(netdev, "Registering only %d out of %d "
 959                         "unicast addresses\n",
 960                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 961                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 962         }
 963
 964         /* Is there an easier way?  Trying to minimize to
 965          * calls to add/del unicast addrs.  We keep the
 966          * addrs from the last call in enic->uc_addr and
 967          * look for changes to add/del.
 968          */
 969
 970         i = 0;
 971         netdev_for_each_uc_addr(ha, netdev) {
 972                 if (i == uc_count)
 973                         break;
 974                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 975         }
 976
 977         for (i = 0; i < enic->uc_count; i++) {
 978                 for (j = 0; j < uc_count; j++)
 979                         if (compare_ether_addr(enic->uc_addr[i],
 980                                 uc_addr[j]) == 0)
 981                                 break;
 982                 if (j == uc_count)
 983                         enic_dev_del_addr(enic, enic->uc_addr[i]);
 984         }
 985
 986         for (i = 0; i < uc_count; i++) {
 987                 for (j = 0; j < enic->uc_count; j++)
 988                         if (compare_ether_addr(uc_addr[i],
 989                                 enic->uc_addr[j]) == 0)
 990                                 break;
 991                 if (j == enic->uc_count)
 992                         enic_dev_add_addr(enic, uc_addr[i]);
 993         }
 994
 995         /* Save the list to compare against next time
 996          */
 997
 998         for (i = 0; i < uc_count; i++)
 999                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1000
1001         enic->uc_count = uc_count;
1002 }
1003
1004 /* netif_tx_lock held, BHs disabled */
1005 static void enic_set_rx_mode(struct net_device *netdev)
1006 {
1007         struct enic *enic = netdev_priv(netdev);
1008         int directed = 1;
1009         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1010         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1011         int promisc = (netdev->flags & IFF_PROMISC) ||
1012                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1013         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1014                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1015         unsigned int flags = netdev->flags |
1016                 (allmulti ? IFF_ALLMULTI : 0) |
1017                 (promisc ? IFF_PROMISC : 0);
1018
1019         if (enic->flags != flags) {
1020                 enic->flags = flags;
1021                 enic_dev_packet_filter(enic, directed,
1022                         multicast, broadcast, promisc, allmulti);
1023         }
1024
1025         if (!promisc) {
1026                 enic_update_unicast_addr_list(enic);
1027                 if (!allmulti)
1028                         enic_update_multicast_addr_list(enic);
1029         }
1030 }
1031
1032 /* netif_tx_lock held, BHs disabled */
1033 static void enic_tx_timeout(struct net_device *netdev)
1034 {
1035         struct enic *enic = netdev_priv(netdev);
1036         schedule_work(&enic->reset);
1037 }
1038
1039 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1040 {
1041         struct enic *enic = netdev_priv(netdev);
1042
1043         if (vf != PORT_SELF_VF)
1044                 return -EOPNOTSUPP;
1045
1046         /* Ignore the vf argument for now. We can assume the request
1047          * is coming on a vf.
1048          */
1049         if (is_valid_ether_addr(mac)) {
1050                 memcpy(enic->pp.vf_mac, mac, ETH_ALEN);
1051                 return 0;
1052         } else
1053                 return -EINVAL;
1054 }
1055
1056 static int enic_set_vf_port(struct net_device *netdev, int vf,
1057         struct nlattr *port[])
1058 {
1059         struct enic *enic = netdev_priv(netdev);
1060         struct enic_port_profile prev_pp;
1061         int err = 0, restore_pp = 1;
1062
1063         /* don't support VFs, yet */
1064         if (vf != PORT_SELF_VF)
1065                 return -EOPNOTSUPP;
1066
1067         if (!port[IFLA_PORT_REQUEST])
1068                 return -EOPNOTSUPP;
1069
1070         memcpy(&prev_pp, &enic->pp, sizeof(enic->pp));
1071         memset(&enic->pp, 0, sizeof(enic->pp));
1072
1073         enic->pp.set |= ENIC_SET_REQUEST;
1074         enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1075
1076         if (port[IFLA_PORT_PROFILE]) {
1077                 enic->pp.set |= ENIC_SET_NAME;
1078                 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1079                         PORT_PROFILE_MAX);
1080         }
1081
1082         if (port[IFLA_PORT_INSTANCE_UUID]) {
1083                 enic->pp.set |= ENIC_SET_INSTANCE;
1084                 memcpy(enic->pp.instance_uuid,
1085                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1086         }
1087
1088         if (port[IFLA_PORT_HOST_UUID]) {
1089                 enic->pp.set |= ENIC_SET_HOST;
1090                 memcpy(enic->pp.host_uuid,
1091                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1092         }
1093
1094         /* Special case handling: mac came from IFLA_VF_MAC */
1095         if (!is_zero_ether_addr(prev_pp.vf_mac))
1096                 memcpy(enic->pp.mac_addr, prev_pp.vf_mac, ETH_ALEN);
1097
1098                 if (is_zero_ether_addr(netdev->dev_addr))
1099                         random_ether_addr(netdev->dev_addr);
1100
1101         err = enic_process_set_pp_request(enic, &prev_pp, &restore_pp);
1102         if (err) {
1103                 if (restore_pp) {
1104                         /* Things are still the way they were: Implicit
1105                          * DISASSOCIATE failed
1106                          */
1107                         memcpy(&enic->pp, &prev_pp, sizeof(enic->pp));
1108                 } else {
1109                         memset(&enic->pp, 0, sizeof(enic->pp));
1110                         memset(netdev->dev_addr, 0, ETH_ALEN);
1111                 }
1112         } else {
1113                 /* Set flag to indicate that the port assoc/disassoc
1114                  * request has been sent out to fw
1115                  */
1116                 enic->pp.set |= ENIC_PORT_REQUEST_APPLIED;
1117
1118                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1119                 if (enic->pp.request == PORT_REQUEST_DISASSOCIATE) {
1120                         memset(enic->pp.mac_addr, 0, ETH_ALEN);
1121                         memset(netdev->dev_addr, 0, ETH_ALEN);
1122                 }
1123         }
1124
1125         memset(enic->pp.vf_mac, 0, ETH_ALEN);
1126
1127         return err;
1128 }
1129
1130 static int enic_get_vf_port(struct net_device *netdev, int vf,
1131         struct sk_buff *skb)
1132 {
1133         struct enic *enic = netdev_priv(netdev);
1134         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1135         int err;
1136
1137         if (!(enic->pp.set & ENIC_PORT_REQUEST_APPLIED))
1138                 return -ENODATA;
1139
1140         err = enic_process_get_pp_request(enic, enic->pp.request, &response);
1141         if (err)
1142                 return err;
1143
1144         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1145         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1146         if (enic->pp.set & ENIC_SET_NAME)
1147                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1148                         enic->pp.name);
1149         if (enic->pp.set & ENIC_SET_INSTANCE)
1150                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1151                         enic->pp.instance_uuid);
1152         if (enic->pp.set & ENIC_SET_HOST)
1153                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1154                         enic->pp.host_uuid);
1155
1156         return 0;
1157
1158 nla_put_failure:
1159         return -EMSGSIZE;
1160 }
1161
1162 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1163 {
1164         struct enic *enic = vnic_dev_priv(rq->vdev);
1165
1166         if (!buf->os_buf)
1167                 return;
1168
1169         pci_unmap_single(enic->pdev, buf->dma_addr,
1170                 buf->len, PCI_DMA_FROMDEVICE);
1171         dev_kfree_skb_any(buf->os_buf);
1172 }
1173
1174 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1175 {
1176         struct enic *enic = vnic_dev_priv(rq->vdev);
1177         struct net_device *netdev = enic->netdev;
1178         struct sk_buff *skb;
1179         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1180         unsigned int os_buf_index = 0;
1181         dma_addr_t dma_addr;
1182
1183         skb = netdev_alloc_skb_ip_align(netdev, len);
1184         if (!skb)
1185                 return -ENOMEM;
1186
1187         dma_addr = pci_map_single(enic->pdev, skb->data,
1188                 len, PCI_DMA_FROMDEVICE);
1189
1190         enic_queue_rq_desc(rq, skb, os_buf_index,
1191                 dma_addr, len);
1192
1193         return 0;
1194 }
1195
1196 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1197         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1198         int skipped, void *opaque)
1199 {
1200         struct enic *enic = vnic_dev_priv(rq->vdev);
1201         struct net_device *netdev = enic->netdev;
1202         struct sk_buff *skb;
1203
1204         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1205         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1206         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1207         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1208         u8 packet_error;
1209         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1210         u32 rss_hash;
1211
1212         if (skipped)
1213                 return;
1214
1215         skb = buf->os_buf;
1216         prefetch(skb->data - NET_IP_ALIGN);
1217         pci_unmap_single(enic->pdev, buf->dma_addr,
1218                 buf->len, PCI_DMA_FROMDEVICE);
1219
1220         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1221                 &type, &color, &q_number, &completed_index,
1222                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1223                 &csum_not_calc, &rss_hash, &bytes_written,
1224                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1225                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1226                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1227                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1228                 &fcs_ok);
1229
1230         if (packet_error) {
1231
1232                 if (!fcs_ok) {
1233                         if (bytes_written > 0)
1234                                 enic->rq_bad_fcs++;
1235                         else if (bytes_written == 0)
1236                                 enic->rq_truncated_pkts++;
1237                 }
1238
1239                 dev_kfree_skb_any(skb);
1240
1241                 return;
1242         }
1243
1244         if (eop && bytes_written > 0) {
1245
1246                 /* Good receive
1247                  */
1248
1249                 skb_put(skb, bytes_written);
1250                 skb->protocol = eth_type_trans(skb, netdev);
1251
1252                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1253                         skb->csum = htons(checksum);
1254                         skb->ip_summed = CHECKSUM_COMPLETE;
1255                 }
1256
1257                 skb->dev = netdev;
1258
1259                 if (vlan_stripped)
1260                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1261
1262                 if (netdev->features & NETIF_F_GRO)
1263                         napi_gro_receive(&enic->napi[q_number], skb);
1264                 else
1265                         netif_receive_skb(skb);
1266         } else {
1267
1268                 /* Buffer overflow
1269                  */
1270
1271                 dev_kfree_skb_any(skb);
1272         }
1273 }
1274
1275 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1276         u8 type, u16 q_number, u16 completed_index, void *opaque)
1277 {
1278         struct enic *enic = vnic_dev_priv(vdev);
1279
1280         vnic_rq_service(&enic->rq[q_number], cq_desc,
1281                 completed_index, VNIC_RQ_RETURN_DESC,
1282                 enic_rq_indicate_buf, opaque);
1283
1284         return 0;
1285 }
1286
1287 static int enic_poll(struct napi_struct *napi, int budget)
1288 {
1289         struct net_device *netdev = napi->dev;
1290         struct enic *enic = netdev_priv(netdev);
1291         unsigned int cq_rq = enic_cq_rq(enic, 0);
1292         unsigned int cq_wq = enic_cq_wq(enic, 0);
1293         unsigned int intr = enic_legacy_io_intr();
1294         unsigned int rq_work_to_do = budget;
1295         unsigned int wq_work_to_do = -1; /* no limit */
1296         unsigned int  work_done, rq_work_done, wq_work_done;
1297         int err;
1298
1299         /* Service RQ (first) and WQ
1300          */
1301
1302         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1303                 rq_work_to_do, enic_rq_service, NULL);
1304
1305         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1306                 wq_work_to_do, enic_wq_service, NULL);
1307
1308         /* Accumulate intr event credits for this polling
1309          * cycle.  An intr event is the completion of a
1310          * a WQ or RQ packet.
1311          */
1312
1313         work_done = rq_work_done + wq_work_done;
1314
1315         if (work_done > 0)
1316                 vnic_intr_return_credits(&enic->intr[intr],
1317                         work_done,
1318                         0 /* don't unmask intr */,
1319                         0 /* don't reset intr timer */);
1320
1321         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1322
1323         /* Buffer allocation failed. Stay in polling
1324          * mode so we can try to fill the ring again.
1325          */
1326
1327         if (err)
1328                 rq_work_done = rq_work_to_do;
1329
1330         if (rq_work_done < rq_work_to_do) {
1331
1332                 /* Some work done, but not enough to stay in polling,
1333                  * exit polling
1334                  */
1335
1336                 napi_complete(napi);
1337                 vnic_intr_unmask(&enic->intr[intr]);
1338         }
1339
1340         return rq_work_done;
1341 }
1342
1343 static int enic_poll_msix(struct napi_struct *napi, int budget)
1344 {
1345         struct net_device *netdev = napi->dev;
1346         struct enic *enic = netdev_priv(netdev);
1347         unsigned int rq = (napi - &enic->napi[0]);
1348         unsigned int cq = enic_cq_rq(enic, rq);
1349         unsigned int intr = enic_msix_rq_intr(enic, rq);
1350         unsigned int work_to_do = budget;
1351         unsigned int work_done;
1352         int err;
1353
1354         /* Service RQ
1355          */
1356
1357         work_done = vnic_cq_service(&enic->cq[cq],
1358                 work_to_do, enic_rq_service, NULL);
1359
1360         /* Return intr event credits for this polling
1361          * cycle.  An intr event is the completion of a
1362          * RQ packet.
1363          */
1364
1365         if (work_done > 0)
1366                 vnic_intr_return_credits(&enic->intr[intr],
1367                         work_done,
1368                         0 /* don't unmask intr */,
1369                         0 /* don't reset intr timer */);
1370
1371         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1372
1373         /* Buffer allocation failed. Stay in polling mode
1374          * so we can try to fill the ring again.
1375          */
1376
1377         if (err)
1378                 work_done = work_to_do;
1379
1380         if (work_done < work_to_do) {
1381
1382                 /* Some work done, but not enough to stay in polling,
1383                  * exit polling
1384                  */
1385
1386                 napi_complete(napi);
1387                 vnic_intr_unmask(&enic->intr[intr]);
1388         }
1389
1390         return work_done;
1391 }
1392
1393 static void enic_notify_timer(unsigned long data)
1394 {
1395         struct enic *enic = (struct enic *)data;
1396
1397         enic_notify_check(enic);
1398
1399         mod_timer(&enic->notify_timer,
1400                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1401 }
1402
1403 static void enic_free_intr(struct enic *enic)
1404 {
1405         struct net_device *netdev = enic->netdev;
1406         unsigned int i;
1407
1408         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1409         case VNIC_DEV_INTR_MODE_INTX:
1410                 free_irq(enic->pdev->irq, netdev);
1411                 break;
1412         case VNIC_DEV_INTR_MODE_MSI:
1413                 free_irq(enic->pdev->irq, enic);
1414                 break;
1415         case VNIC_DEV_INTR_MODE_MSIX:
1416                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1417                         if (enic->msix[i].requested)
1418                                 free_irq(enic->msix_entry[i].vector,
1419                                         enic->msix[i].devid);
1420                 break;
1421         default:
1422                 break;
1423         }
1424 }
1425
1426 static int enic_request_intr(struct enic *enic)
1427 {
1428         struct net_device *netdev = enic->netdev;
1429         unsigned int i, intr;
1430         int err = 0;
1431
1432         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1433
1434         case VNIC_DEV_INTR_MODE_INTX:
1435
1436                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1437                         IRQF_SHARED, netdev->name, netdev);
1438                 break;
1439
1440         case VNIC_DEV_INTR_MODE_MSI:
1441
1442                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1443                         0, netdev->name, enic);
1444                 break;
1445
1446         case VNIC_DEV_INTR_MODE_MSIX:
1447
1448                 for (i = 0; i < enic->rq_count; i++) {
1449                         intr = enic_msix_rq_intr(enic, i);
1450                         sprintf(enic->msix[intr].devname,
1451                                 "%.11s-rx-%d", netdev->name, i);
1452                         enic->msix[intr].isr = enic_isr_msix_rq;
1453                         enic->msix[intr].devid = &enic->napi[i];
1454                 }
1455
1456                 for (i = 0; i < enic->wq_count; i++) {
1457                         intr = enic_msix_wq_intr(enic, i);
1458                         sprintf(enic->msix[intr].devname,
1459                                 "%.11s-tx-%d", netdev->name, i);
1460                         enic->msix[intr].isr = enic_isr_msix_wq;
1461                         enic->msix[intr].devid = enic;
1462                 }
1463
1464                 intr = enic_msix_err_intr(enic);
1465                 sprintf(enic->msix[intr].devname,
1466                         "%.11s-err", netdev->name);
1467                 enic->msix[intr].isr = enic_isr_msix_err;
1468                 enic->msix[intr].devid = enic;
1469
1470                 intr = enic_msix_notify_intr(enic);
1471                 sprintf(enic->msix[intr].devname,
1472                         "%.11s-notify", netdev->name);
1473                 enic->msix[intr].isr = enic_isr_msix_notify;
1474                 enic->msix[intr].devid = enic;
1475
1476                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1477                         enic->msix[i].requested = 0;
1478
1479                 for (i = 0; i < enic->intr_count; i++) {
1480                         err = request_irq(enic->msix_entry[i].vector,
1481                                 enic->msix[i].isr, 0,
1482                                 enic->msix[i].devname,
1483                                 enic->msix[i].devid);
1484                         if (err) {
1485                                 enic_free_intr(enic);
1486                                 break;
1487                         }
1488                         enic->msix[i].requested = 1;
1489                 }
1490
1491                 break;
1492
1493         default:
1494                 break;
1495         }
1496
1497         return err;
1498 }
1499
1500 static void enic_synchronize_irqs(struct enic *enic)
1501 {
1502         unsigned int i;
1503
1504         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1505         case VNIC_DEV_INTR_MODE_INTX:
1506         case VNIC_DEV_INTR_MODE_MSI:
1507                 synchronize_irq(enic->pdev->irq);
1508                 break;
1509         case VNIC_DEV_INTR_MODE_MSIX:
1510                 for (i = 0; i < enic->intr_count; i++)
1511                         synchronize_irq(enic->msix_entry[i].vector);
1512                 break;
1513         default:
1514                 break;
1515         }
1516 }
1517
1518 static int enic_dev_notify_set(struct enic *enic)
1519 {
1520         int err;
1521
1522         spin_lock(&enic->devcmd_lock);
1523         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1524         case VNIC_DEV_INTR_MODE_INTX:
1525                 err = vnic_dev_notify_set(enic->vdev,
1526                         enic_legacy_notify_intr());
1527                 break;
1528         case VNIC_DEV_INTR_MODE_MSIX:
1529                 err = vnic_dev_notify_set(enic->vdev,
1530                         enic_msix_notify_intr(enic));
1531                 break;
1532         default:
1533                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1534                 break;
1535         }
1536         spin_unlock(&enic->devcmd_lock);
1537
1538         return err;
1539 }
1540
1541 static void enic_notify_timer_start(struct enic *enic)
1542 {
1543         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1544         case VNIC_DEV_INTR_MODE_MSI:
1545                 mod_timer(&enic->notify_timer, jiffies);
1546                 break;
1547         default:
1548                 /* Using intr for notification for INTx/MSI-X */
1549                 break;
1550         }
1551 }
1552
1553 /* rtnl lock is held, process context */
1554 static int enic_open(struct net_device *netdev)
1555 {
1556         struct enic *enic = netdev_priv(netdev);
1557         unsigned int i;
1558         int err;
1559
1560         err = enic_request_intr(enic);
1561         if (err) {
1562                 netdev_err(netdev, "Unable to request irq.\n");
1563                 return err;
1564         }
1565
1566         err = enic_dev_notify_set(enic);
1567         if (err) {
1568                 netdev_err(netdev,
1569                         "Failed to alloc notify buffer, aborting.\n");
1570                 goto err_out_free_intr;
1571         }
1572
1573         for (i = 0; i < enic->rq_count; i++) {
1574                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1575                 /* Need at least one buffer on ring to get going */
1576                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1577                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1578                         err = -ENOMEM;
1579                         goto err_out_notify_unset;
1580                 }
1581         }
1582
1583         for (i = 0; i < enic->wq_count; i++)
1584                 vnic_wq_enable(&enic->wq[i]);
1585         for (i = 0; i < enic->rq_count; i++)
1586                 vnic_rq_enable(&enic->rq[i]);
1587
1588         if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1589                 enic_dev_add_addr(enic, enic->pp.mac_addr);
1590         else
1591                 enic_dev_add_station_addr(enic);
1592         enic_set_rx_mode(netdev);
1593
1594         netif_wake_queue(netdev);
1595
1596         for (i = 0; i < enic->rq_count; i++)
1597                 napi_enable(&enic->napi[i]);
1598
1599         enic_dev_enable(enic);
1600
1601         for (i = 0; i < enic->intr_count; i++)
1602                 vnic_intr_unmask(&enic->intr[i]);
1603
1604         enic_notify_timer_start(enic);
1605
1606         return 0;
1607
1608 err_out_notify_unset:
1609         enic_dev_notify_unset(enic);
1610 err_out_free_intr:
1611         enic_free_intr(enic);
1612
1613         return err;
1614 }
1615
1616 /* rtnl lock is held, process context */
1617 static int enic_stop(struct net_device *netdev)
1618 {
1619         struct enic *enic = netdev_priv(netdev);
1620         unsigned int i;
1621         int err;
1622
1623         for (i = 0; i < enic->intr_count; i++) {
1624                 vnic_intr_mask(&enic->intr[i]);
1625                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1626         }
1627
1628         enic_synchronize_irqs(enic);
1629
1630         del_timer_sync(&enic->notify_timer);
1631
1632         enic_dev_disable(enic);
1633
1634         for (i = 0; i < enic->rq_count; i++)
1635                 napi_disable(&enic->napi[i]);
1636
1637         netif_carrier_off(netdev);
1638         netif_tx_disable(netdev);
1639         if (enic_is_dynamic(enic) && !is_zero_ether_addr(enic->pp.mac_addr))
1640                 enic_dev_del_addr(enic, enic->pp.mac_addr);
1641         else
1642                 enic_dev_del_station_addr(enic);
1643
1644         for (i = 0; i < enic->wq_count; i++) {
1645                 err = vnic_wq_disable(&enic->wq[i]);
1646                 if (err)
1647                         return err;
1648         }
1649         for (i = 0; i < enic->rq_count; i++) {
1650                 err = vnic_rq_disable(&enic->rq[i]);
1651                 if (err)
1652                         return err;
1653         }
1654
1655         enic_dev_notify_unset(enic);
1656         enic_free_intr(enic);
1657
1658         for (i = 0; i < enic->wq_count; i++)
1659                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1660         for (i = 0; i < enic->rq_count; i++)
1661                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1662         for (i = 0; i < enic->cq_count; i++)
1663                 vnic_cq_clean(&enic->cq[i]);
1664         for (i = 0; i < enic->intr_count; i++)
1665                 vnic_intr_clean(&enic->intr[i]);
1666
1667         return 0;
1668 }
1669
1670 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1671 {
1672         struct enic *enic = netdev_priv(netdev);
1673         int running = netif_running(netdev);
1674
1675         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1676                 return -EINVAL;
1677
1678         if (enic_is_dynamic(enic))
1679                 return -EOPNOTSUPP;
1680
1681         if (running)
1682                 enic_stop(netdev);
1683
1684         netdev->mtu = new_mtu;
1685
1686         if (netdev->mtu > enic->port_mtu)
1687                 netdev_warn(netdev,
1688                         "interface MTU (%d) set higher than port MTU (%d)\n",
1689                         netdev->mtu, enic->port_mtu);
1690
1691         if (running)
1692                 enic_open(netdev);
1693
1694         return 0;
1695 }
1696
1697 static void enic_change_mtu_work(struct work_struct *work)
1698 {
1699         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1700         struct net_device *netdev = enic->netdev;
1701         int new_mtu = vnic_dev_mtu(enic->vdev);
1702         int err;
1703         unsigned int i;
1704
1705         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1706
1707         rtnl_lock();
1708
1709         /* Stop RQ */
1710         del_timer_sync(&enic->notify_timer);
1711
1712         for (i = 0; i < enic->rq_count; i++)
1713                 napi_disable(&enic->napi[i]);
1714
1715         vnic_intr_mask(&enic->intr[0]);
1716         enic_synchronize_irqs(enic);
1717         err = vnic_rq_disable(&enic->rq[0]);
1718         if (err) {
1719                 netdev_err(netdev, "Unable to disable RQ.\n");
1720                 return;
1721         }
1722         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1723         vnic_cq_clean(&enic->cq[0]);
1724         vnic_intr_clean(&enic->intr[0]);
1725
1726         /* Fill RQ with new_mtu-sized buffers */
1727         netdev->mtu = new_mtu;
1728         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1729         /* Need at least one buffer on ring to get going */
1730         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1731                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1732                 return;
1733         }
1734
1735         /* Start RQ */
1736         vnic_rq_enable(&enic->rq[0]);
1737         napi_enable(&enic->napi[0]);
1738         vnic_intr_unmask(&enic->intr[0]);
1739         enic_notify_timer_start(enic);
1740
1741         rtnl_unlock();
1742
1743         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1744 }
1745
1746 #ifdef CONFIG_NET_POLL_CONTROLLER
1747 static void enic_poll_controller(struct net_device *netdev)
1748 {
1749         struct enic *enic = netdev_priv(netdev);
1750         struct vnic_dev *vdev = enic->vdev;
1751         unsigned int i, intr;
1752
1753         switch (vnic_dev_get_intr_mode(vdev)) {
1754         case VNIC_DEV_INTR_MODE_MSIX:
1755                 for (i = 0; i < enic->rq_count; i++) {
1756                         intr = enic_msix_rq_intr(enic, i);
1757                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1758                                 &enic->napi[i]);
1759                 }
1760
1761                 for (i = 0; i < enic->wq_count; i++) {
1762                         intr = enic_msix_wq_intr(enic, i);
1763                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1764                 }
1765
1766                 break;
1767         case VNIC_DEV_INTR_MODE_MSI:
1768                 enic_isr_msi(enic->pdev->irq, enic);
1769                 break;
1770         case VNIC_DEV_INTR_MODE_INTX:
1771                 enic_isr_legacy(enic->pdev->irq, netdev);
1772                 break;
1773         default:
1774                 break;
1775         }
1776 }
1777 #endif
1778
1779 static int enic_dev_wait(struct vnic_dev *vdev,
1780         int (*start)(struct vnic_dev *, int),
1781         int (*finished)(struct vnic_dev *, int *),
1782         int arg)
1783 {
1784         unsigned long time;
1785         int done;
1786         int err;
1787
1788         BUG_ON(in_interrupt());
1789
1790         err = start(vdev, arg);
1791         if (err)
1792                 return err;
1793
1794         /* Wait for func to complete...2 seconds max
1795          */
1796
1797         time = jiffies + (HZ * 2);
1798         do {
1799
1800                 err = finished(vdev, &done);
1801                 if (err)
1802                         return err;
1803
1804                 if (done)
1805                         return 0;
1806
1807                 schedule_timeout_uninterruptible(HZ / 10);
1808
1809         } while (time_after(time, jiffies));
1810
1811         return -ETIMEDOUT;
1812 }
1813
1814 static int enic_dev_open(struct enic *enic)
1815 {
1816         int err;
1817
1818         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1819                 vnic_dev_open_done, 0);
1820         if (err)
1821                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1822                         err);
1823
1824         return err;
1825 }
1826
1827 static int enic_dev_hang_reset(struct enic *enic)
1828 {
1829         int err;
1830
1831         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1832                 vnic_dev_hang_reset_done, 0);
1833         if (err)
1834                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1835                         err);
1836
1837         return err;
1838 }
1839
1840 static int enic_set_rsskey(struct enic *enic)
1841 {
1842         dma_addr_t rss_key_buf_pa;
1843         union vnic_rss_key *rss_key_buf_va = NULL;
1844         union vnic_rss_key rss_key = {
1845                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1846                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1847                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1848                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1849         };
1850         int err;
1851
1852         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1853                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1854         if (!rss_key_buf_va)
1855                 return -ENOMEM;
1856
1857         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1858
1859         spin_lock(&enic->devcmd_lock);
1860         err = enic_set_rss_key(enic,
1861                 rss_key_buf_pa,
1862                 sizeof(union vnic_rss_key));
1863         spin_unlock(&enic->devcmd_lock);
1864
1865         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1866                 rss_key_buf_va, rss_key_buf_pa);
1867
1868         return err;
1869 }
1870
1871 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1872 {
1873         dma_addr_t rss_cpu_buf_pa;
1874         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1875         unsigned int i;
1876         int err;
1877
1878         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1879                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1880         if (!rss_cpu_buf_va)
1881                 return -ENOMEM;
1882
1883         for (i = 0; i < (1 << rss_hash_bits); i++)
1884                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1885
1886         spin_lock(&enic->devcmd_lock);
1887         err = enic_set_rss_cpu(enic,
1888                 rss_cpu_buf_pa,
1889                 sizeof(union vnic_rss_cpu));
1890         spin_unlock(&enic->devcmd_lock);
1891
1892         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1893                 rss_cpu_buf_va, rss_cpu_buf_pa);
1894
1895         return err;
1896 }
1897
1898 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1899         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1900 {
1901         const u8 tso_ipid_split_en = 0;
1902         const u8 ig_vlan_strip_en = 1;
1903         int err;
1904
1905         /* Enable VLAN tag stripping.
1906         */
1907
1908         spin_lock(&enic->devcmd_lock);
1909         err = enic_set_nic_cfg(enic,
1910                 rss_default_cpu, rss_hash_type,
1911                 rss_hash_bits, rss_base_cpu,
1912                 rss_enable, tso_ipid_split_en,
1913                 ig_vlan_strip_en);
1914         spin_unlock(&enic->devcmd_lock);
1915
1916         return err;
1917 }
1918
1919 static int enic_set_rss_nic_cfg(struct enic *enic)
1920 {
1921         struct device *dev = enic_get_dev(enic);
1922         const u8 rss_default_cpu = 0;
1923         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1924                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1925                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1926                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1927         const u8 rss_hash_bits = 7;
1928         const u8 rss_base_cpu = 0;
1929         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1930
1931         if (rss_enable) {
1932                 if (!enic_set_rsskey(enic)) {
1933                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1934                                 rss_enable = 0;
1935                                 dev_warn(dev, "RSS disabled, "
1936                                         "Failed to set RSS cpu indirection table.");
1937                         }
1938                 } else {
1939                         rss_enable = 0;
1940                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1941                 }
1942         }
1943
1944         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1945                 rss_hash_bits, rss_base_cpu, rss_enable);
1946 }
1947
1948 static void enic_reset(struct work_struct *work)
1949 {
1950         struct enic *enic = container_of(work, struct enic, reset);
1951
1952         if (!netif_running(enic->netdev))
1953                 return;
1954
1955         rtnl_lock();
1956
1957         enic_dev_hang_notify(enic);
1958         enic_stop(enic->netdev);
1959         enic_dev_hang_reset(enic);
1960         enic_reset_addr_lists(enic);
1961         enic_init_vnic_resources(enic);
1962         enic_set_rss_nic_cfg(enic);
1963         enic_dev_set_ig_vlan_rewrite_mode(enic);
1964         enic_open(enic->netdev);
1965
1966         rtnl_unlock();
1967 }
1968
1969 static int enic_set_intr_mode(struct enic *enic)
1970 {
1971         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1972         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1973         unsigned int i;
1974
1975         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1976          * on system capabilities.
1977          *
1978          * Try MSI-X first
1979          *
1980          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1981          * (the second to last INTR is used for WQ/RQ errors)
1982          * (the last INTR is used for notifications)
1983          */
1984
1985         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1986         for (i = 0; i < n + m + 2; i++)
1987                 enic->msix_entry[i].entry = i;
1988
1989         /* Use multiple RQs if RSS is enabled
1990          */
1991
1992         if (ENIC_SETTING(enic, RSS) &&
1993             enic->config.intr_mode < 1 &&
1994             enic->rq_count >= n &&
1995             enic->wq_count >= m &&
1996             enic->cq_count >= n + m &&
1997             enic->intr_count >= n + m + 2) {
1998
1999                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2000
2001                         enic->rq_count = n;
2002                         enic->wq_count = m;
2003                         enic->cq_count = n + m;
2004                         enic->intr_count = n + m + 2;
2005
2006                         vnic_dev_set_intr_mode(enic->vdev,
2007                                 VNIC_DEV_INTR_MODE_MSIX);
2008
2009                         return 0;
2010                 }
2011         }
2012
2013         if (enic->config.intr_mode < 1 &&
2014             enic->rq_count >= 1 &&
2015             enic->wq_count >= m &&
2016             enic->cq_count >= 1 + m &&
2017             enic->intr_count >= 1 + m + 2) {
2018                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2019
2020                         enic->rq_count = 1;
2021                         enic->wq_count = m;
2022                         enic->cq_count = 1 + m;
2023                         enic->intr_count = 1 + m + 2;
2024
2025                         vnic_dev_set_intr_mode(enic->vdev,
2026                                 VNIC_DEV_INTR_MODE_MSIX);
2027
2028                         return 0;
2029                 }
2030         }
2031
2032         /* Next try MSI
2033          *
2034          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2035          */
2036
2037         if (enic->config.intr_mode < 2 &&
2038             enic->rq_count >= 1 &&
2039             enic->wq_count >= 1 &&
2040             enic->cq_count >= 2 &&
2041             enic->intr_count >= 1 &&
2042             !pci_enable_msi(enic->pdev)) {
2043
2044                 enic->rq_count = 1;
2045                 enic->wq_count = 1;
2046                 enic->cq_count = 2;
2047                 enic->intr_count = 1;
2048
2049                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2050
2051                 return 0;
2052         }
2053
2054         /* Next try INTx
2055          *
2056          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2057          * (the first INTR is used for WQ/RQ)
2058          * (the second INTR is used for WQ/RQ errors)
2059          * (the last INTR is used for notifications)
2060          */
2061
2062         if (enic->config.intr_mode < 3 &&
2063             enic->rq_count >= 1 &&
2064             enic->wq_count >= 1 &&
2065             enic->cq_count >= 2 &&
2066             enic->intr_count >= 3) {
2067
2068                 enic->rq_count = 1;
2069                 enic->wq_count = 1;
2070                 enic->cq_count = 2;
2071                 enic->intr_count = 3;
2072
2073                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2074
2075                 return 0;
2076         }
2077
2078         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2079
2080         return -EINVAL;
2081 }
2082
2083 static void enic_clear_intr_mode(struct enic *enic)
2084 {
2085         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2086         case VNIC_DEV_INTR_MODE_MSIX:
2087                 pci_disable_msix(enic->pdev);
2088                 break;
2089         case VNIC_DEV_INTR_MODE_MSI:
2090                 pci_disable_msi(enic->pdev);
2091                 break;
2092         default:
2093                 break;
2094         }
2095
2096         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2097 }
2098
2099 static const struct net_device_ops enic_netdev_dynamic_ops = {
2100         .ndo_open               = enic_open,
2101         .ndo_stop               = enic_stop,
2102         .ndo_start_xmit         = enic_hard_start_xmit,
2103         .ndo_get_stats64        = enic_get_stats,
2104         .ndo_validate_addr      = eth_validate_addr,
2105         .ndo_set_rx_mode        = enic_set_rx_mode,
2106         .ndo_set_multicast_list = enic_set_rx_mode,
2107         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2108         .ndo_change_mtu         = enic_change_mtu,
2109         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2110         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2111         .ndo_tx_timeout         = enic_tx_timeout,
2112         .ndo_set_vf_port        = enic_set_vf_port,
2113         .ndo_get_vf_port        = enic_get_vf_port,
2114         .ndo_set_vf_mac         = enic_set_vf_mac,
2115 #ifdef CONFIG_NET_POLL_CONTROLLER
2116         .ndo_poll_controller    = enic_poll_controller,
2117 #endif
2118 };
2119
2120 static const struct net_device_ops enic_netdev_ops = {
2121         .ndo_open               = enic_open,
2122         .ndo_stop               = enic_stop,
2123         .ndo_start_xmit         = enic_hard_start_xmit,
2124         .ndo_get_stats64        = enic_get_stats,
2125         .ndo_validate_addr      = eth_validate_addr,
2126         .ndo_set_mac_address    = enic_set_mac_address,
2127         .ndo_set_rx_mode        = enic_set_rx_mode,
2128         .ndo_set_multicast_list = enic_set_rx_mode,
2129         .ndo_change_mtu         = enic_change_mtu,
2130         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2131         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2132         .ndo_tx_timeout         = enic_tx_timeout,
2133 #ifdef CONFIG_NET_POLL_CONTROLLER
2134         .ndo_poll_controller    = enic_poll_controller,
2135 #endif
2136 };
2137
2138 static void enic_dev_deinit(struct enic *enic)
2139 {
2140         unsigned int i;
2141
2142         for (i = 0; i < enic->rq_count; i++)
2143                 netif_napi_del(&enic->napi[i]);
2144
2145         enic_free_vnic_resources(enic);
2146         enic_clear_intr_mode(enic);
2147 }
2148
2149 static int enic_dev_init(struct enic *enic)
2150 {
2151         struct device *dev = enic_get_dev(enic);
2152         struct net_device *netdev = enic->netdev;
2153         unsigned int i;
2154         int err;
2155
2156         /* Get interrupt coalesce timer info */
2157         err = enic_dev_intr_coal_timer_info(enic);
2158         if (err) {
2159                 dev_warn(dev, "Using default conversion factor for "
2160                         "interrupt coalesce timer\n");
2161                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2162         }
2163
2164         /* Get vNIC configuration
2165          */
2166
2167         err = enic_get_vnic_config(enic);
2168         if (err) {
2169                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2170                 return err;
2171         }
2172
2173         /* Get available resource counts
2174          */
2175
2176         enic_get_res_counts(enic);
2177
2178         /* Set interrupt mode based on resource counts and system
2179          * capabilities
2180          */
2181
2182         err = enic_set_intr_mode(enic);
2183         if (err) {
2184                 dev_err(dev, "Failed to set intr mode based on resource "
2185                         "counts and system capabilities, aborting\n");
2186                 return err;
2187         }
2188
2189         /* Allocate and configure vNIC resources
2190          */
2191
2192         err = enic_alloc_vnic_resources(enic);
2193         if (err) {
2194                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2195                 goto err_out_free_vnic_resources;
2196         }
2197
2198         enic_init_vnic_resources(enic);
2199
2200         err = enic_set_rss_nic_cfg(enic);
2201         if (err) {
2202                 dev_err(dev, "Failed to config nic, aborting\n");
2203                 goto err_out_free_vnic_resources;
2204         }
2205
2206         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2207         default:
2208                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2209                 break;
2210         case VNIC_DEV_INTR_MODE_MSIX:
2211                 for (i = 0; i < enic->rq_count; i++)
2212                         netif_napi_add(netdev, &enic->napi[i],
2213                                 enic_poll_msix, 64);
2214                 break;
2215         }
2216
2217         return 0;
2218
2219 err_out_free_vnic_resources:
2220         enic_clear_intr_mode(enic);
2221         enic_free_vnic_resources(enic);
2222
2223         return err;
2224 }
2225
2226 static void enic_iounmap(struct enic *enic)
2227 {
2228         unsigned int i;
2229
2230         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2231                 if (enic->bar[i].vaddr)
2232                         iounmap(enic->bar[i].vaddr);
2233 }
2234
2235 static int __devinit enic_probe(struct pci_dev *pdev,
2236         const struct pci_device_id *ent)
2237 {
2238         struct device *dev = &pdev->dev;
2239         struct net_device *netdev;
2240         struct enic *enic;
2241         int using_dac = 0;
2242         unsigned int i;
2243         int err;
2244
2245         /* Allocate net device structure and initialize.  Private
2246          * instance data is initialized to zero.
2247          */
2248
2249         netdev = alloc_etherdev(sizeof(struct enic));
2250         if (!netdev) {
2251                 pr_err("Etherdev alloc failed, aborting\n");
2252                 return -ENOMEM;
2253         }
2254
2255         pci_set_drvdata(pdev, netdev);
2256
2257         SET_NETDEV_DEV(netdev, &pdev->dev);
2258
2259         enic = netdev_priv(netdev);
2260         enic->netdev = netdev;
2261         enic->pdev = pdev;
2262
2263         /* Setup PCI resources
2264          */
2265
2266         err = pci_enable_device_mem(pdev);
2267         if (err) {
2268                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2269                 goto err_out_free_netdev;
2270         }
2271
2272         err = pci_request_regions(pdev, DRV_NAME);
2273         if (err) {
2274                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2275                 goto err_out_disable_device;
2276         }
2277
2278         pci_set_master(pdev);
2279
2280         /* Query PCI controller on system for DMA addressing
2281          * limitation for the device.  Try 40-bit first, and
2282          * fail to 32-bit.
2283          */
2284
2285         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2286         if (err) {
2287                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2288                 if (err) {
2289                         dev_err(dev, "No usable DMA configuration, aborting\n");
2290                         goto err_out_release_regions;
2291                 }
2292                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2293                 if (err) {
2294                         dev_err(dev, "Unable to obtain %u-bit DMA "
2295                                 "for consistent allocations, aborting\n", 32);
2296                         goto err_out_release_regions;
2297                 }
2298         } else {
2299                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2300                 if (err) {
2301                         dev_err(dev, "Unable to obtain %u-bit DMA "
2302                                 "for consistent allocations, aborting\n", 40);
2303                         goto err_out_release_regions;
2304                 }
2305                 using_dac = 1;
2306         }
2307
2308         /* Map vNIC resources from BAR0-5
2309          */
2310
2311         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2312                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2313                         continue;
2314                 enic->bar[i].len = pci_resource_len(pdev, i);
2315                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2316                 if (!enic->bar[i].vaddr) {
2317                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2318                         err = -ENODEV;
2319                         goto err_out_iounmap;
2320                 }
2321                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2322         }
2323
2324         /* Register vNIC device
2325          */
2326
2327         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2328                 ARRAY_SIZE(enic->bar));
2329         if (!enic->vdev) {
2330                 dev_err(dev, "vNIC registration failed, aborting\n");
2331                 err = -ENODEV;
2332                 goto err_out_iounmap;
2333         }
2334
2335         /* Issue device open to get device in known state
2336          */
2337
2338         err = enic_dev_open(enic);
2339         if (err) {
2340                 dev_err(dev, "vNIC dev open failed, aborting\n");
2341                 goto err_out_vnic_unregister;
2342         }
2343
2344         /* Setup devcmd lock
2345          */
2346
2347         spin_lock_init(&enic->devcmd_lock);
2348
2349         /*
2350          * Set ingress vlan rewrite mode before vnic initialization
2351          */
2352
2353         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2354         if (err) {
2355                 dev_err(dev,
2356                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2357                 goto err_out_dev_close;
2358         }
2359
2360         /* Issue device init to initialize the vnic-to-switch link.
2361          * We'll start with carrier off and wait for link UP
2362          * notification later to turn on carrier.  We don't need
2363          * to wait here for the vnic-to-switch link initialization
2364          * to complete; link UP notification is the indication that
2365          * the process is complete.
2366          */
2367
2368         netif_carrier_off(netdev);
2369
2370         /* Do not call dev_init for a dynamic vnic.
2371          * For a dynamic vnic, init_prov_info will be
2372          * called later by an upper layer.
2373          */
2374
2375         if (!enic_is_dynamic(enic)) {
2376                 err = vnic_dev_init(enic->vdev, 0);
2377                 if (err) {
2378                         dev_err(dev, "vNIC dev init failed, aborting\n");
2379                         goto err_out_dev_close;
2380                 }
2381         }
2382
2383         err = enic_dev_init(enic);
2384         if (err) {
2385                 dev_err(dev, "Device initialization failed, aborting\n");
2386                 goto err_out_dev_close;
2387         }
2388
2389         /* Setup notification timer, HW reset task, and wq locks
2390          */
2391
2392         init_timer(&enic->notify_timer);
2393         enic->notify_timer.function = enic_notify_timer;
2394         enic->notify_timer.data = (unsigned long)enic;
2395
2396         INIT_WORK(&enic->reset, enic_reset);
2397         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2398
2399         for (i = 0; i < enic->wq_count; i++)
2400                 spin_lock_init(&enic->wq_lock[i]);
2401
2402         /* Register net device
2403          */
2404
2405         enic->port_mtu = enic->config.mtu;
2406         (void)enic_change_mtu(netdev, enic->port_mtu);
2407
2408         err = enic_set_mac_addr(netdev, enic->mac_addr);
2409         if (err) {
2410                 dev_err(dev, "Invalid MAC address, aborting\n");
2411                 goto err_out_dev_deinit;
2412         }
2413
2414         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2415         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2416
2417         if (enic_is_dynamic(enic))
2418                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2419         else
2420                 netdev->netdev_ops = &enic_netdev_ops;
2421
2422         netdev->watchdog_timeo = 2 * HZ;
2423         netdev->ethtool_ops = &enic_ethtool_ops;
2424
2425         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2426         if (ENIC_SETTING(enic, LOOP)) {
2427                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2428                 enic->loop_enable = 1;
2429                 enic->loop_tag = enic->config.loop_tag;
2430                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2431         }
2432         if (ENIC_SETTING(enic, TXCSUM))
2433                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2434         if (ENIC_SETTING(enic, TSO))
2435                 netdev->hw_features |= NETIF_F_TSO |
2436                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2437         if (ENIC_SETTING(enic, RXCSUM))
2438                 netdev->hw_features |= NETIF_F_RXCSUM;
2439
2440         netdev->features |= netdev->hw_features;
2441
2442         if (using_dac)
2443                 netdev->features |= NETIF_F_HIGHDMA;
2444
2445         err = register_netdev(netdev);
2446         if (err) {
2447                 dev_err(dev, "Cannot register net device, aborting\n");
2448                 goto err_out_dev_deinit;
2449         }
2450
2451         return 0;
2452
2453 err_out_dev_deinit:
2454         enic_dev_deinit(enic);
2455 err_out_dev_close:
2456         vnic_dev_close(enic->vdev);
2457 err_out_vnic_unregister:
2458         vnic_dev_unregister(enic->vdev);
2459 err_out_iounmap:
2460         enic_iounmap(enic);
2461 err_out_release_regions:
2462         pci_release_regions(pdev);
2463 err_out_disable_device:
2464         pci_disable_device(pdev);
2465 err_out_free_netdev:
2466         pci_set_drvdata(pdev, NULL);
2467         free_netdev(netdev);
2468
2469         return err;
2470 }
2471
2472 static void __devexit enic_remove(struct pci_dev *pdev)
2473 {
2474         struct net_device *netdev = pci_get_drvdata(pdev);
2475
2476         if (netdev) {
2477                 struct enic *enic = netdev_priv(netdev);
2478
2479                 cancel_work_sync(&enic->reset);
2480                 cancel_work_sync(&enic->change_mtu_work);
2481                 unregister_netdev(netdev);
2482                 enic_dev_deinit(enic);
2483                 vnic_dev_close(enic->vdev);
2484                 vnic_dev_unregister(enic->vdev);
2485                 enic_iounmap(enic);
2486                 pci_release_regions(pdev);
2487                 pci_disable_device(pdev);
2488                 pci_set_drvdata(pdev, NULL);
2489                 free_netdev(netdev);
2490         }
2491 }
2492
2493 static struct pci_driver enic_driver = {
2494         .name = DRV_NAME,
2495         .id_table = enic_id_table,
2496         .probe = enic_probe,
2497         .remove = __devexit_p(enic_remove),
2498 };
2499
2500 static int __init enic_init_module(void)
2501 {
2502         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2503
2504         return pci_register_driver(&enic_driver);
2505 }
2506
2507 static void __exit enic_cleanup_module(void)
2508 {
2509         pci_unregister_driver(&enic_driver);
2510 }
2511
2512 module_init(enic_init_module);
2513 module_exit(enic_cleanup_module);