drivers/net/ethernet/cisco/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.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/if_vlan.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/ipv6.h>
  38 #include <linux/tcp.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/prefetch.h>
  41 #include <net/ip6_checksum.h>
  42
  43 #include "cq_enet_desc.h"
  44 #include "vnic_dev.h"
  45 #include "vnic_intr.h"
  46 #include "vnic_stats.h"
  47 #include "vnic_vic.h"
  48 #include "enic_res.h"
  49 #include "enic.h"
  50 #include "enic_dev.h"
  51 #include "enic_pp.h"
  52
  53 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  54 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  55 #define MAX_TSO                         (1 << 16)
  56 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  57
  58 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  59 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  60
  61 /* Supported devices */
  62 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  63         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  64         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  65         { 0, }  /* end of table */
  66 };
  67
  68 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  69 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  70 MODULE_LICENSE("GPL");
  71 MODULE_VERSION(DRV_VERSION);
  72 MODULE_DEVICE_TABLE(pci, enic_id_table);
  73
  74 struct enic_stat {
  75         char name[ETH_GSTRING_LEN];
  76         unsigned int offset;
  77 };
  78
  79 #define ENIC_TX_STAT(stat)      \
  80         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  81 #define ENIC_RX_STAT(stat)      \
  82         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  83
  84 static const struct enic_stat enic_tx_stats[] = {
  85         ENIC_TX_STAT(tx_frames_ok),
  86         ENIC_TX_STAT(tx_unicast_frames_ok),
  87         ENIC_TX_STAT(tx_multicast_frames_ok),
  88         ENIC_TX_STAT(tx_broadcast_frames_ok),
  89         ENIC_TX_STAT(tx_bytes_ok),
  90         ENIC_TX_STAT(tx_unicast_bytes_ok),
  91         ENIC_TX_STAT(tx_multicast_bytes_ok),
  92         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  93         ENIC_TX_STAT(tx_drops),
  94         ENIC_TX_STAT(tx_errors),
  95         ENIC_TX_STAT(tx_tso),
  96 };
  97
  98 static const struct enic_stat enic_rx_stats[] = {
  99         ENIC_RX_STAT(rx_frames_ok),
 100         ENIC_RX_STAT(rx_frames_total),
 101         ENIC_RX_STAT(rx_unicast_frames_ok),
 102         ENIC_RX_STAT(rx_multicast_frames_ok),
 103         ENIC_RX_STAT(rx_broadcast_frames_ok),
 104         ENIC_RX_STAT(rx_bytes_ok),
 105         ENIC_RX_STAT(rx_unicast_bytes_ok),
 106         ENIC_RX_STAT(rx_multicast_bytes_ok),
 107         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 108         ENIC_RX_STAT(rx_drop),
 109         ENIC_RX_STAT(rx_no_bufs),
 110         ENIC_RX_STAT(rx_errors),
 111         ENIC_RX_STAT(rx_rss),
 112         ENIC_RX_STAT(rx_crc_errors),
 113         ENIC_RX_STAT(rx_frames_64),
 114         ENIC_RX_STAT(rx_frames_127),
 115         ENIC_RX_STAT(rx_frames_255),
 116         ENIC_RX_STAT(rx_frames_511),
 117         ENIC_RX_STAT(rx_frames_1023),
 118         ENIC_RX_STAT(rx_frames_1518),
 119         ENIC_RX_STAT(rx_frames_to_max),
 120 };
 121
 122 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 123 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 124
 125 int enic_is_dynamic(struct enic *enic)
 126 {
 127         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 128 }
 129
 130 int enic_sriov_enabled(struct enic *enic)
 131 {
 132         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 133 }
 134
 135 int enic_is_valid_vf(struct enic *enic, int vf)
 136 {
 137 #ifdef CONFIG_PCI_IOV
 138         return vf >= 0 && vf < enic->num_vfs;
 139 #else
 140         return 0;
 141 #endif
 142 }
 143
 144 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 145 {
 146         return rq;
 147 }
 148
 149 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 150 {
 151         return enic->rq_count + wq;
 152 }
 153
 154 static inline unsigned int enic_legacy_io_intr(void)
 155 {
 156         return 0;
 157 }
 158
 159 static inline unsigned int enic_legacy_err_intr(void)
 160 {
 161         return 1;
 162 }
 163
 164 static inline unsigned int enic_legacy_notify_intr(void)
 165 {
 166         return 2;
 167 }
 168
 169 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 170 {
 171         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 172 }
 173
 174 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 175 {
 176         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 177 }
 178
 179 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 180 {
 181         return enic->rq_count + enic->wq_count;
 182 }
 183
 184 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 185 {
 186         return enic->rq_count + enic->wq_count + 1;
 187 }
 188
 189 static int enic_get_settings(struct net_device *netdev,
 190         struct ethtool_cmd *ecmd)
 191 {
 192         struct enic *enic = netdev_priv(netdev);
 193
 194         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 195         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 196         ecmd->port = PORT_FIBRE;
 197         ecmd->transceiver = XCVR_EXTERNAL;
 198
 199         if (netif_carrier_ok(netdev)) {
 200                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 201                 ecmd->duplex = DUPLEX_FULL;
 202         } else {
 203                 ethtool_cmd_speed_set(ecmd, -1);
 204                 ecmd->duplex = -1;
 205         }
 206
 207         ecmd->autoneg = AUTONEG_DISABLE;
 208
 209         return 0;
 210 }
 211
 212 static void enic_get_drvinfo(struct net_device *netdev,
 213         struct ethtool_drvinfo *drvinfo)
 214 {
 215         struct enic *enic = netdev_priv(netdev);
 216         struct vnic_devcmd_fw_info *fw_info;
 217
 218         enic_dev_fw_info(enic, &fw_info);
 219
 220         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 221         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 222         strncpy(drvinfo->fw_version, fw_info->fw_version,
 223                 sizeof(drvinfo->fw_version));
 224         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 225                 sizeof(drvinfo->bus_info));
 226 }
 227
 228 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 229 {
 230         unsigned int i;
 231
 232         switch (stringset) {
 233         case ETH_SS_STATS:
 234                 for (i = 0; i < enic_n_tx_stats; i++) {
 235                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 236                         data += ETH_GSTRING_LEN;
 237                 }
 238                 for (i = 0; i < enic_n_rx_stats; i++) {
 239                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 240                         data += ETH_GSTRING_LEN;
 241                 }
 242                 break;
 243         }
 244 }
 245
 246 static int enic_get_sset_count(struct net_device *netdev, int sset)
 247 {
 248         switch (sset) {
 249         case ETH_SS_STATS:
 250                 return enic_n_tx_stats + enic_n_rx_stats;
 251         default:
 252                 return -EOPNOTSUPP;
 253         }
 254 }
 255
 256 static void enic_get_ethtool_stats(struct net_device *netdev,
 257         struct ethtool_stats *stats, u64 *data)
 258 {
 259         struct enic *enic = netdev_priv(netdev);
 260         struct vnic_stats *vstats;
 261         unsigned int i;
 262
 263         enic_dev_stats_dump(enic, &vstats);
 264
 265         for (i = 0; i < enic_n_tx_stats; i++)
 266                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 267         for (i = 0; i < enic_n_rx_stats; i++)
 268                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 269 }
 270
 271 static u32 enic_get_msglevel(struct net_device *netdev)
 272 {
 273         struct enic *enic = netdev_priv(netdev);
 274         return enic->msg_enable;
 275 }
 276
 277 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 278 {
 279         struct enic *enic = netdev_priv(netdev);
 280         enic->msg_enable = value;
 281 }
 282
 283 static int enic_get_coalesce(struct net_device *netdev,
 284         struct ethtool_coalesce *ecmd)
 285 {
 286         struct enic *enic = netdev_priv(netdev);
 287
 288         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 289         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 290
 291         return 0;
 292 }
 293
 294 static int enic_set_coalesce(struct net_device *netdev,
 295         struct ethtool_coalesce *ecmd)
 296 {
 297         struct enic *enic = netdev_priv(netdev);
 298         u32 tx_coalesce_usecs;
 299         u32 rx_coalesce_usecs;
 300         unsigned int i, intr;
 301
 302         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 303                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 304         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 305                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 306
 307         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 308         case VNIC_DEV_INTR_MODE_INTX:
 309                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 310                         return -EINVAL;
 311
 312                 intr = enic_legacy_io_intr();
 313                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 314                         tx_coalesce_usecs);
 315                 break;
 316         case VNIC_DEV_INTR_MODE_MSI:
 317                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 318                         return -EINVAL;
 319
 320                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 321                         tx_coalesce_usecs);
 322                 break;
 323         case VNIC_DEV_INTR_MODE_MSIX:
 324                 for (i = 0; i < enic->wq_count; i++) {
 325                         intr = enic_msix_wq_intr(enic, i);
 326                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 327                                 tx_coalesce_usecs);
 328                 }
 329
 330                 for (i = 0; i < enic->rq_count; i++) {
 331                         intr = enic_msix_rq_intr(enic, i);
 332                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 333                                 rx_coalesce_usecs);
 334                 }
 335
 336                 break;
 337         default:
 338                 break;
 339         }
 340
 341         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 342         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 343
 344         return 0;
 345 }
 346
 347 static const struct ethtool_ops enic_ethtool_ops = {
 348         .get_settings = enic_get_settings,
 349         .get_drvinfo = enic_get_drvinfo,
 350         .get_msglevel = enic_get_msglevel,
 351         .set_msglevel = enic_set_msglevel,
 352         .get_link = ethtool_op_get_link,
 353         .get_strings = enic_get_strings,
 354         .get_sset_count = enic_get_sset_count,
 355         .get_ethtool_stats = enic_get_ethtool_stats,
 356         .get_coalesce = enic_get_coalesce,
 357         .set_coalesce = enic_set_coalesce,
 358 };
 359
 360 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 361 {
 362         struct enic *enic = vnic_dev_priv(wq->vdev);
 363
 364         if (buf->sop)
 365                 pci_unmap_single(enic->pdev, buf->dma_addr,
 366                         buf->len, PCI_DMA_TODEVICE);
 367         else
 368                 pci_unmap_page(enic->pdev, buf->dma_addr,
 369                         buf->len, PCI_DMA_TODEVICE);
 370
 371         if (buf->os_buf)
 372                 dev_kfree_skb_any(buf->os_buf);
 373 }
 374
 375 static void enic_wq_free_buf(struct vnic_wq *wq,
 376         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 377 {
 378         enic_free_wq_buf(wq, buf);
 379 }
 380
 381 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 382         u8 type, u16 q_number, u16 completed_index, void *opaque)
 383 {
 384         struct enic *enic = vnic_dev_priv(vdev);
 385
 386         spin_lock(&enic->wq_lock[q_number]);
 387
 388         vnic_wq_service(&enic->wq[q_number], cq_desc,
 389                 completed_index, enic_wq_free_buf,
 390                 opaque);
 391
 392         if (netif_queue_stopped(enic->netdev) &&
 393             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 394             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 395                 netif_wake_queue(enic->netdev);
 396
 397         spin_unlock(&enic->wq_lock[q_number]);
 398
 399         return 0;
 400 }
 401
 402 static void enic_log_q_error(struct enic *enic)
 403 {
 404         unsigned int i;
 405         u32 error_status;
 406
 407         for (i = 0; i < enic->wq_count; i++) {
 408                 error_status = vnic_wq_error_status(&enic->wq[i]);
 409                 if (error_status)
 410                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 411                                 i, error_status);
 412         }
 413
 414         for (i = 0; i < enic->rq_count; i++) {
 415                 error_status = vnic_rq_error_status(&enic->rq[i]);
 416                 if (error_status)
 417                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 418                                 i, error_status);
 419         }
 420 }
 421
 422 static void enic_msglvl_check(struct enic *enic)
 423 {
 424         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 425
 426         if (msg_enable != enic->msg_enable) {
 427                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 428                         enic->msg_enable, msg_enable);
 429                 enic->msg_enable = msg_enable;
 430         }
 431 }
 432
 433 static void enic_mtu_check(struct enic *enic)
 434 {
 435         u32 mtu = vnic_dev_mtu(enic->vdev);
 436         struct net_device *netdev = enic->netdev;
 437
 438         if (mtu && mtu != enic->port_mtu) {
 439                 enic->port_mtu = mtu;
 440                 if (enic_is_dynamic(enic)) {
 441                         mtu = max_t(int, ENIC_MIN_MTU,
 442                                 min_t(int, ENIC_MAX_MTU, mtu));
 443                         if (mtu != netdev->mtu)
 444                                 schedule_work(&enic->change_mtu_work);
 445                 } else {
 446                         if (mtu < netdev->mtu)
 447                                 netdev_warn(netdev,
 448                                         "interface MTU (%d) set higher "
 449                                         "than switch port MTU (%d)\n",
 450                                         netdev->mtu, mtu);
 451                 }
 452         }
 453 }
 454
 455 static void enic_link_check(struct enic *enic)
 456 {
 457         int link_status = vnic_dev_link_status(enic->vdev);
 458         int carrier_ok = netif_carrier_ok(enic->netdev);
 459
 460         if (link_status && !carrier_ok) {
 461                 netdev_info(enic->netdev, "Link UP\n");
 462                 netif_carrier_on(enic->netdev);
 463         } else if (!link_status && carrier_ok) {
 464                 netdev_info(enic->netdev, "Link DOWN\n");
 465                 netif_carrier_off(enic->netdev);
 466         }
 467 }
 468
 469 static void enic_notify_check(struct enic *enic)
 470 {
 471         enic_msglvl_check(enic);
 472         enic_mtu_check(enic);
 473         enic_link_check(enic);
 474 }
 475
 476 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 477
 478 static irqreturn_t enic_isr_legacy(int irq, void *data)
 479 {
 480         struct net_device *netdev = data;
 481         struct enic *enic = netdev_priv(netdev);
 482         unsigned int io_intr = enic_legacy_io_intr();
 483         unsigned int err_intr = enic_legacy_err_intr();
 484         unsigned int notify_intr = enic_legacy_notify_intr();
 485         u32 pba;
 486
 487         vnic_intr_mask(&enic->intr[io_intr]);
 488
 489         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 490         if (!pba) {
 491                 vnic_intr_unmask(&enic->intr[io_intr]);
 492                 return IRQ_NONE;        /* not our interrupt */
 493         }
 494
 495         if (ENIC_TEST_INTR(pba, notify_intr)) {
 496                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 497                 enic_notify_check(enic);
 498         }
 499
 500         if (ENIC_TEST_INTR(pba, err_intr)) {
 501                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 502                 enic_log_q_error(enic);
 503                 /* schedule recovery from WQ/RQ error */
 504                 schedule_work(&enic->reset);
 505                 return IRQ_HANDLED;
 506         }
 507
 508         if (ENIC_TEST_INTR(pba, io_intr)) {
 509                 if (napi_schedule_prep(&enic->napi[0]))
 510                         __napi_schedule(&enic->napi[0]);
 511         } else {
 512                 vnic_intr_unmask(&enic->intr[io_intr]);
 513         }
 514
 515         return IRQ_HANDLED;
 516 }
 517
 518 static irqreturn_t enic_isr_msi(int irq, void *data)
 519 {
 520         struct enic *enic = data;
 521
 522         /* With MSI, there is no sharing of interrupts, so this is
 523          * our interrupt and there is no need to ack it.  The device
 524          * is not providing per-vector masking, so the OS will not
 525          * write to PCI config space to mask/unmask the interrupt.
 526          * We're using mask_on_assertion for MSI, so the device
 527          * automatically masks the interrupt when the interrupt is
 528          * generated.  Later, when exiting polling, the interrupt
 529          * will be unmasked (see enic_poll).
 530          *
 531          * Also, the device uses the same PCIe Traffic Class (TC)
 532          * for Memory Write data and MSI, so there are no ordering
 533          * issues; the MSI will always arrive at the Root Complex
 534          * _after_ corresponding Memory Writes (i.e. descriptor
 535          * writes).
 536          */
 537
 538         napi_schedule(&enic->napi[0]);
 539
 540         return IRQ_HANDLED;
 541 }
 542
 543 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 544 {
 545         struct napi_struct *napi = data;
 546
 547         /* schedule NAPI polling for RQ cleanup */
 548         napi_schedule(napi);
 549
 550         return IRQ_HANDLED;
 551 }
 552
 553 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 554 {
 555         struct enic *enic = data;
 556         unsigned int cq = enic_cq_wq(enic, 0);
 557         unsigned int intr = enic_msix_wq_intr(enic, 0);
 558         unsigned int wq_work_to_do = -1; /* no limit */
 559         unsigned int wq_work_done;
 560
 561         wq_work_done = vnic_cq_service(&enic->cq[cq],
 562                 wq_work_to_do, enic_wq_service, NULL);
 563
 564         vnic_intr_return_credits(&enic->intr[intr],
 565                 wq_work_done,
 566                 1 /* unmask intr */,
 567                 1 /* reset intr timer */);
 568
 569         return IRQ_HANDLED;
 570 }
 571
 572 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 573 {
 574         struct enic *enic = data;
 575         unsigned int intr = enic_msix_err_intr(enic);
 576
 577         vnic_intr_return_all_credits(&enic->intr[intr]);
 578
 579         enic_log_q_error(enic);
 580
 581         /* schedule recovery from WQ/RQ error */
 582         schedule_work(&enic->reset);
 583
 584         return IRQ_HANDLED;
 585 }
 586
 587 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 588 {
 589         struct enic *enic = data;
 590         unsigned int intr = enic_msix_notify_intr(enic);
 591
 592         vnic_intr_return_all_credits(&enic->intr[intr]);
 593         enic_notify_check(enic);
 594
 595         return IRQ_HANDLED;
 596 }
 597
 598 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 599         struct vnic_wq *wq, struct sk_buff *skb,
 600         unsigned int len_left, int loopback)
 601 {
 602         const skb_frag_t *frag;
 603
 604         /* Queue additional data fragments */
 605         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 606                 len_left -= skb_frag_size(frag);
 607                 enic_queue_wq_desc_cont(wq, skb,
 608                         skb_frag_dma_map(&enic->pdev->dev,
 609                                          frag, 0, skb_frag_size(frag),
 610                                          DMA_TO_DEVICE),
 611                         skb_frag_size(frag),
 612                         (len_left == 0),        /* EOP? */
 613                         loopback);
 614         }
 615 }
 616
 617 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 618         struct vnic_wq *wq, struct sk_buff *skb,
 619         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 620 {
 621         unsigned int head_len = skb_headlen(skb);
 622         unsigned int len_left = skb->len - head_len;
 623         int eop = (len_left == 0);
 624
 625         /* Queue the main skb fragment. The fragments are no larger
 626          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 627          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 628          * per fragment is queued.
 629          */
 630         enic_queue_wq_desc(wq, skb,
 631                 pci_map_single(enic->pdev, skb->data,
 632                         head_len, PCI_DMA_TODEVICE),
 633                 head_len,
 634                 vlan_tag_insert, vlan_tag,
 635                 eop, loopback);
 636
 637         if (!eop)
 638                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 639 }
 640
 641 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 642         struct vnic_wq *wq, struct sk_buff *skb,
 643         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 644 {
 645         unsigned int head_len = skb_headlen(skb);
 646         unsigned int len_left = skb->len - head_len;
 647         unsigned int hdr_len = skb_checksum_start_offset(skb);
 648         unsigned int csum_offset = hdr_len + skb->csum_offset;
 649         int eop = (len_left == 0);
 650
 651         /* Queue the main skb fragment. The fragments are no larger
 652          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 653          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 654          * per fragment is queued.
 655          */
 656         enic_queue_wq_desc_csum_l4(wq, skb,
 657                 pci_map_single(enic->pdev, skb->data,
 658                         head_len, PCI_DMA_TODEVICE),
 659                 head_len,
 660                 csum_offset,
 661                 hdr_len,
 662                 vlan_tag_insert, vlan_tag,
 663                 eop, loopback);
 664
 665         if (!eop)
 666                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 667 }
 668
 669 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 670         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 671         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 672 {
 673         unsigned int frag_len_left = skb_headlen(skb);
 674         unsigned int len_left = skb->len - frag_len_left;
 675         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 676         int eop = (len_left == 0);
 677         unsigned int len;
 678         dma_addr_t dma_addr;
 679         unsigned int offset = 0;
 680         skb_frag_t *frag;
 681
 682         /* Preload TCP csum field with IP pseudo hdr calculated
 683          * with IP length set to zero.  HW will later add in length
 684          * to each TCP segment resulting from the TSO.
 685          */
 686
 687         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 688                 ip_hdr(skb)->check = 0;
 689                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 690                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 691         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 692                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 693                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 694         }
 695
 696         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 697          * for the main skb fragment
 698          */
 699         while (frag_len_left) {
 700                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 701                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 702                                 len, PCI_DMA_TODEVICE);
 703                 enic_queue_wq_desc_tso(wq, skb,
 704                         dma_addr,
 705                         len,
 706                         mss, hdr_len,
 707                         vlan_tag_insert, vlan_tag,
 708                         eop && (len == frag_len_left), loopback);
 709                 frag_len_left -= len;
 710                 offset += len;
 711         }
 712
 713         if (eop)
 714                 return;
 715
 716         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 717          * for additional data fragments
 718          */
 719         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 720                 len_left -= skb_frag_size(frag);
 721                 frag_len_left = skb_frag_size(frag);
 722                 offset = 0;
 723
 724                 while (frag_len_left) {
 725                         len = min(frag_len_left,
 726                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 727                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 728                                                     offset, len,
 729                                                     DMA_TO_DEVICE);
 730                         enic_queue_wq_desc_cont(wq, skb,
 731                                 dma_addr,
 732                                 len,
 733                                 (len_left == 0) &&
 734                                 (len == frag_len_left),         /* EOP? */
 735                                 loopback);
 736                         frag_len_left -= len;
 737                         offset += len;
 738                 }
 739         }
 740 }
 741
 742 static inline void enic_queue_wq_skb(struct enic *enic,
 743         struct vnic_wq *wq, struct sk_buff *skb)
 744 {
 745         unsigned int mss = skb_shinfo(skb)->gso_size;
 746         unsigned int vlan_tag = 0;
 747         int vlan_tag_insert = 0;
 748         int loopback = 0;
 749
 750         if (vlan_tx_tag_present(skb)) {
 751                 /* VLAN tag from trunking driver */
 752                 vlan_tag_insert = 1;
 753                 vlan_tag = vlan_tx_tag_get(skb);
 754         } else if (enic->loop_enable) {
 755                 vlan_tag = enic->loop_tag;
 756                 loopback = 1;
 757         }
 758
 759         if (mss)
 760                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 761                         vlan_tag_insert, vlan_tag, loopback);
 762         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 763                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 764                         vlan_tag_insert, vlan_tag, loopback);
 765         else
 766                 enic_queue_wq_skb_vlan(enic, wq, skb,
 767                         vlan_tag_insert, vlan_tag, loopback);
 768 }
 769
 770 /* netif_tx_lock held, process context with BHs disabled, or BH */
 771 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 772         struct net_device *netdev)
 773 {
 774         struct enic *enic = netdev_priv(netdev);
 775         struct vnic_wq *wq = &enic->wq[0];
 776         unsigned long flags;
 777
 778         if (skb->len <= 0) {
 779                 dev_kfree_skb(skb);
 780                 return NETDEV_TX_OK;
 781         }
 782
 783         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 784          * which is very likely.  In the off chance it's going to take
 785          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 786          */
 787
 788         if (skb_shinfo(skb)->gso_size == 0 &&
 789             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 790             skb_linearize(skb)) {
 791                 dev_kfree_skb(skb);
 792                 return NETDEV_TX_OK;
 793         }
 794
 795         spin_lock_irqsave(&enic->wq_lock[0], flags);
 796
 797         if (vnic_wq_desc_avail(wq) <
 798             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 799                 netif_stop_queue(netdev);
 800                 /* This is a hard error, log it */
 801                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 802                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 803                 return NETDEV_TX_BUSY;
 804         }
 805
 806         enic_queue_wq_skb(enic, wq, skb);
 807
 808         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 809                 netif_stop_queue(netdev);
 810
 811         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 812
 813         return NETDEV_TX_OK;
 814 }
 815
 816 /* dev_base_lock rwlock held, nominally process context */
 817 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 818                                                 struct rtnl_link_stats64 *net_stats)
 819 {
 820         struct enic *enic = netdev_priv(netdev);
 821         struct vnic_stats *stats;
 822
 823         enic_dev_stats_dump(enic, &stats);
 824
 825         net_stats->tx_packets = stats->tx.tx_frames_ok;
 826         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 827         net_stats->tx_errors = stats->tx.tx_errors;
 828         net_stats->tx_dropped = stats->tx.tx_drops;
 829
 830         net_stats->rx_packets = stats->rx.rx_frames_ok;
 831         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 832         net_stats->rx_errors = stats->rx.rx_errors;
 833         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 834         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 835         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 836         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 837
 838         return net_stats;
 839 }
 840
 841 void enic_reset_addr_lists(struct enic *enic)
 842 {
 843         enic->mc_count = 0;
 844         enic->uc_count = 0;
 845         enic->flags = 0;
 846 }
 847
 848 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 849 {
 850         struct enic *enic = netdev_priv(netdev);
 851
 852         if (enic_is_dynamic(enic)) {
 853                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 854                         return -EADDRNOTAVAIL;
 855         } else {
 856                 if (!is_valid_ether_addr(addr))
 857                         return -EADDRNOTAVAIL;
 858         }
 859
 860         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 861
 862         return 0;
 863 }
 864
 865 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 866 {
 867         struct enic *enic = netdev_priv(netdev);
 868         struct sockaddr *saddr = p;
 869         char *addr = saddr->sa_data;
 870         int err;
 871
 872         if (netif_running(enic->netdev)) {
 873                 err = enic_dev_del_station_addr(enic);
 874                 if (err)
 875                         return err;
 876         }
 877
 878         err = enic_set_mac_addr(netdev, addr);
 879         if (err)
 880                 return err;
 881
 882         if (netif_running(enic->netdev)) {
 883                 err = enic_dev_add_station_addr(enic);
 884                 if (err)
 885                         return err;
 886         }
 887
 888         return err;
 889 }
 890
 891 static int enic_set_mac_address(struct net_device *netdev, void *p)
 892 {
 893         struct sockaddr *saddr = p;
 894         char *addr = saddr->sa_data;
 895         struct enic *enic = netdev_priv(netdev);
 896         int err;
 897
 898         err = enic_dev_del_station_addr(enic);
 899         if (err)
 900                 return err;
 901
 902         err = enic_set_mac_addr(netdev, addr);
 903         if (err)
 904                 return err;
 905
 906         return enic_dev_add_station_addr(enic);
 907 }
 908
 909 static void enic_update_multicast_addr_list(struct enic *enic)
 910 {
 911         struct net_device *netdev = enic->netdev;
 912         struct netdev_hw_addr *ha;
 913         unsigned int mc_count = netdev_mc_count(netdev);
 914         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 915         unsigned int i, j;
 916
 917         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 918                 netdev_warn(netdev, "Registering only %d out of %d "
 919                         "multicast addresses\n",
 920                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 921                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 922         }
 923
 924         /* Is there an easier way?  Trying to minimize to
 925          * calls to add/del multicast addrs.  We keep the
 926          * addrs from the last call in enic->mc_addr and
 927          * look for changes to add/del.
 928          */
 929
 930         i = 0;
 931         netdev_for_each_mc_addr(ha, netdev) {
 932                 if (i == mc_count)
 933                         break;
 934                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 935         }
 936
 937         for (i = 0; i < enic->mc_count; i++) {
 938                 for (j = 0; j < mc_count; j++)
 939                         if (compare_ether_addr(enic->mc_addr[i],
 940                                 mc_addr[j]) == 0)
 941                                 break;
 942                 if (j == mc_count)
 943                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 944         }
 945
 946         for (i = 0; i < mc_count; i++) {
 947                 for (j = 0; j < enic->mc_count; j++)
 948                         if (compare_ether_addr(mc_addr[i],
 949                                 enic->mc_addr[j]) == 0)
 950                                 break;
 951                 if (j == enic->mc_count)
 952                         enic_dev_add_addr(enic, mc_addr[i]);
 953         }
 954
 955         /* Save the list to compare against next time
 956          */
 957
 958         for (i = 0; i < mc_count; i++)
 959                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 960
 961         enic->mc_count = mc_count;
 962 }
 963
 964 static void enic_update_unicast_addr_list(struct enic *enic)
 965 {
 966         struct net_device *netdev = enic->netdev;
 967         struct netdev_hw_addr *ha;
 968         unsigned int uc_count = netdev_uc_count(netdev);
 969         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 970         unsigned int i, j;
 971
 972         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 973                 netdev_warn(netdev, "Registering only %d out of %d "
 974                         "unicast addresses\n",
 975                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 976                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 977         }
 978
 979         /* Is there an easier way?  Trying to minimize to
 980          * calls to add/del unicast addrs.  We keep the
 981          * addrs from the last call in enic->uc_addr and
 982          * look for changes to add/del.
 983          */
 984
 985         i = 0;
 986         netdev_for_each_uc_addr(ha, netdev) {
 987                 if (i == uc_count)
 988                         break;
 989                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 990         }
 991
 992         for (i = 0; i < enic->uc_count; i++) {
 993                 for (j = 0; j < uc_count; j++)
 994                         if (compare_ether_addr(enic->uc_addr[i],
 995                                 uc_addr[j]) == 0)
 996                                 break;
 997                 if (j == uc_count)
 998                         enic_dev_del_addr(enic, enic->uc_addr[i]);
 999         }
1000
1001         for (i = 0; i < uc_count; i++) {
1002                 for (j = 0; j < enic->uc_count; j++)
1003                         if (compare_ether_addr(uc_addr[i],
1004                                 enic->uc_addr[j]) == 0)
1005                                 break;
1006                 if (j == enic->uc_count)
1007                         enic_dev_add_addr(enic, uc_addr[i]);
1008         }
1009
1010         /* Save the list to compare against next time
1011          */
1012
1013         for (i = 0; i < uc_count; i++)
1014                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1015
1016         enic->uc_count = uc_count;
1017 }
1018
1019 /* netif_tx_lock held, BHs disabled */
1020 static void enic_set_rx_mode(struct net_device *netdev)
1021 {
1022         struct enic *enic = netdev_priv(netdev);
1023         int directed = 1;
1024         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1025         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1026         int promisc = (netdev->flags & IFF_PROMISC) ||
1027                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1028         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1029                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1030         unsigned int flags = netdev->flags |
1031                 (allmulti ? IFF_ALLMULTI : 0) |
1032                 (promisc ? IFF_PROMISC : 0);
1033
1034         if (enic->flags != flags) {
1035                 enic->flags = flags;
1036                 enic_dev_packet_filter(enic, directed,
1037                         multicast, broadcast, promisc, allmulti);
1038         }
1039
1040         if (!promisc) {
1041                 enic_update_unicast_addr_list(enic);
1042                 if (!allmulti)
1043                         enic_update_multicast_addr_list(enic);
1044         }
1045 }
1046
1047 /* netif_tx_lock held, BHs disabled */
1048 static void enic_tx_timeout(struct net_device *netdev)
1049 {
1050         struct enic *enic = netdev_priv(netdev);
1051         schedule_work(&enic->reset);
1052 }
1053
1054 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1055 {
1056         struct enic *enic = netdev_priv(netdev);
1057         struct enic_port_profile *pp;
1058         int err;
1059
1060         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1061         if (err)
1062                 return err;
1063
1064         if (is_valid_ether_addr(mac)) {
1065                 memcpy(pp->vf_mac, mac, ETH_ALEN);
1066                 return 0;
1067         } else
1068                 return -EINVAL;
1069 }
1070
1071 static int enic_set_vf_port(struct net_device *netdev, int vf,
1072         struct nlattr *port[])
1073 {
1074         struct enic *enic = netdev_priv(netdev);
1075         struct enic_port_profile prev_pp;
1076         struct enic_port_profile *pp;
1077         int err = 0, restore_pp = 1;
1078
1079         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1080         if (err)
1081                 return err;
1082
1083         if (!port[IFLA_PORT_REQUEST])
1084                 return -EOPNOTSUPP;
1085
1086         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1087         memset(pp, 0, sizeof(*enic->pp));
1088
1089         pp->set |= ENIC_SET_REQUEST;
1090         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1091
1092         if (port[IFLA_PORT_PROFILE]) {
1093                 pp->set |= ENIC_SET_NAME;
1094                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1095                         PORT_PROFILE_MAX);
1096         }
1097
1098         if (port[IFLA_PORT_INSTANCE_UUID]) {
1099                 pp->set |= ENIC_SET_INSTANCE;
1100                 memcpy(pp->instance_uuid,
1101                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1102         }
1103
1104         if (port[IFLA_PORT_HOST_UUID]) {
1105                 pp->set |= ENIC_SET_HOST;
1106                 memcpy(pp->host_uuid,
1107                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1108         }
1109
1110         /* Special case handling: mac came from IFLA_VF_MAC */
1111         if (!is_zero_ether_addr(prev_pp.vf_mac))
1112                 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1113
1114         if (vf == PORT_SELF_VF && is_zero_ether_addr(netdev->dev_addr))
1115                 random_ether_addr(netdev->dev_addr);
1116
1117         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1118         if (err) {
1119                 if (restore_pp) {
1120                         /* Things are still the way they were: Implicit
1121                          * DISASSOCIATE failed
1122                          */
1123                         memcpy(pp, &prev_pp, sizeof(*pp));
1124                 } else {
1125                         memset(pp, 0, sizeof(*pp));
1126                         if (vf == PORT_SELF_VF)
1127                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1128                 }
1129         } else {
1130                 /* Set flag to indicate that the port assoc/disassoc
1131                  * request has been sent out to fw
1132                  */
1133                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1134
1135                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1136                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1137                         memset(pp->mac_addr, 0, ETH_ALEN);
1138                         if (vf == PORT_SELF_VF)
1139                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1140                 }
1141         }
1142
1143         memset(pp->vf_mac, 0, ETH_ALEN);
1144
1145         return err;
1146 }
1147
1148 static int enic_get_vf_port(struct net_device *netdev, int vf,
1149         struct sk_buff *skb)
1150 {
1151         struct enic *enic = netdev_priv(netdev);
1152         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1153         struct enic_port_profile *pp;
1154         int err;
1155
1156         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1157         if (err)
1158                 return err;
1159
1160         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1161                 return -ENODATA;
1162
1163         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1164         if (err)
1165                 return err;
1166
1167         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1168         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1169         if (pp->set & ENIC_SET_NAME)
1170                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1171                         pp->name);
1172         if (pp->set & ENIC_SET_INSTANCE)
1173                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1174                         pp->instance_uuid);
1175         if (pp->set & ENIC_SET_HOST)
1176                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1177                         pp->host_uuid);
1178
1179         return 0;
1180
1181 nla_put_failure:
1182         return -EMSGSIZE;
1183 }
1184
1185 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1186 {
1187         struct enic *enic = vnic_dev_priv(rq->vdev);
1188
1189         if (!buf->os_buf)
1190                 return;
1191
1192         pci_unmap_single(enic->pdev, buf->dma_addr,
1193                 buf->len, PCI_DMA_FROMDEVICE);
1194         dev_kfree_skb_any(buf->os_buf);
1195 }
1196
1197 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1198 {
1199         struct enic *enic = vnic_dev_priv(rq->vdev);
1200         struct net_device *netdev = enic->netdev;
1201         struct sk_buff *skb;
1202         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1203         unsigned int os_buf_index = 0;
1204         dma_addr_t dma_addr;
1205
1206         skb = netdev_alloc_skb_ip_align(netdev, len);
1207         if (!skb)
1208                 return -ENOMEM;
1209
1210         dma_addr = pci_map_single(enic->pdev, skb->data,
1211                 len, PCI_DMA_FROMDEVICE);
1212
1213         enic_queue_rq_desc(rq, skb, os_buf_index,
1214                 dma_addr, len);
1215
1216         return 0;
1217 }
1218
1219 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1220         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1221         int skipped, void *opaque)
1222 {
1223         struct enic *enic = vnic_dev_priv(rq->vdev);
1224         struct net_device *netdev = enic->netdev;
1225         struct sk_buff *skb;
1226
1227         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1228         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1229         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1230         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1231         u8 packet_error;
1232         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1233         u32 rss_hash;
1234
1235         if (skipped)
1236                 return;
1237
1238         skb = buf->os_buf;
1239         prefetch(skb->data - NET_IP_ALIGN);
1240         pci_unmap_single(enic->pdev, buf->dma_addr,
1241                 buf->len, PCI_DMA_FROMDEVICE);
1242
1243         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1244                 &type, &color, &q_number, &completed_index,
1245                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1246                 &csum_not_calc, &rss_hash, &bytes_written,
1247                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1248                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1249                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1250                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1251                 &fcs_ok);
1252
1253         if (packet_error) {
1254
1255                 if (!fcs_ok) {
1256                         if (bytes_written > 0)
1257                                 enic->rq_bad_fcs++;
1258                         else if (bytes_written == 0)
1259                                 enic->rq_truncated_pkts++;
1260                 }
1261
1262                 dev_kfree_skb_any(skb);
1263
1264                 return;
1265         }
1266
1267         if (eop && bytes_written > 0) {
1268
1269                 /* Good receive
1270                  */
1271
1272                 skb_put(skb, bytes_written);
1273                 skb->protocol = eth_type_trans(skb, netdev);
1274
1275                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1276                         skb->csum = htons(checksum);
1277                         skb->ip_summed = CHECKSUM_COMPLETE;
1278                 }
1279
1280                 skb->dev = netdev;
1281
1282                 if (vlan_stripped)
1283                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1284
1285                 if (netdev->features & NETIF_F_GRO)
1286                         napi_gro_receive(&enic->napi[q_number], skb);
1287                 else
1288                         netif_receive_skb(skb);
1289         } else {
1290
1291                 /* Buffer overflow
1292                  */
1293
1294                 dev_kfree_skb_any(skb);
1295         }
1296 }
1297
1298 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1299         u8 type, u16 q_number, u16 completed_index, void *opaque)
1300 {
1301         struct enic *enic = vnic_dev_priv(vdev);
1302
1303         vnic_rq_service(&enic->rq[q_number], cq_desc,
1304                 completed_index, VNIC_RQ_RETURN_DESC,
1305                 enic_rq_indicate_buf, opaque);
1306
1307         return 0;
1308 }
1309
1310 static int enic_poll(struct napi_struct *napi, int budget)
1311 {
1312         struct net_device *netdev = napi->dev;
1313         struct enic *enic = netdev_priv(netdev);
1314         unsigned int cq_rq = enic_cq_rq(enic, 0);
1315         unsigned int cq_wq = enic_cq_wq(enic, 0);
1316         unsigned int intr = enic_legacy_io_intr();
1317         unsigned int rq_work_to_do = budget;
1318         unsigned int wq_work_to_do = -1; /* no limit */
1319         unsigned int  work_done, rq_work_done, wq_work_done;
1320         int err;
1321
1322         /* Service RQ (first) and WQ
1323          */
1324
1325         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1326                 rq_work_to_do, enic_rq_service, NULL);
1327
1328         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1329                 wq_work_to_do, enic_wq_service, NULL);
1330
1331         /* Accumulate intr event credits for this polling
1332          * cycle.  An intr event is the completion of a
1333          * a WQ or RQ packet.
1334          */
1335
1336         work_done = rq_work_done + wq_work_done;
1337
1338         if (work_done > 0)
1339                 vnic_intr_return_credits(&enic->intr[intr],
1340                         work_done,
1341                         0 /* don't unmask intr */,
1342                         0 /* don't reset intr timer */);
1343
1344         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1345
1346         /* Buffer allocation failed. Stay in polling
1347          * mode so we can try to fill the ring again.
1348          */
1349
1350         if (err)
1351                 rq_work_done = rq_work_to_do;
1352
1353         if (rq_work_done < rq_work_to_do) {
1354
1355                 /* Some work done, but not enough to stay in polling,
1356                  * exit polling
1357                  */
1358
1359                 napi_complete(napi);
1360                 vnic_intr_unmask(&enic->intr[intr]);
1361         }
1362
1363         return rq_work_done;
1364 }
1365
1366 static int enic_poll_msix(struct napi_struct *napi, int budget)
1367 {
1368         struct net_device *netdev = napi->dev;
1369         struct enic *enic = netdev_priv(netdev);
1370         unsigned int rq = (napi - &enic->napi[0]);
1371         unsigned int cq = enic_cq_rq(enic, rq);
1372         unsigned int intr = enic_msix_rq_intr(enic, rq);
1373         unsigned int work_to_do = budget;
1374         unsigned int work_done;
1375         int err;
1376
1377         /* Service RQ
1378          */
1379
1380         work_done = vnic_cq_service(&enic->cq[cq],
1381                 work_to_do, enic_rq_service, NULL);
1382
1383         /* Return intr event credits for this polling
1384          * cycle.  An intr event is the completion of a
1385          * RQ packet.
1386          */
1387
1388         if (work_done > 0)
1389                 vnic_intr_return_credits(&enic->intr[intr],
1390                         work_done,
1391                         0 /* don't unmask intr */,
1392                         0 /* don't reset intr timer */);
1393
1394         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1395
1396         /* Buffer allocation failed. Stay in polling mode
1397          * so we can try to fill the ring again.
1398          */
1399
1400         if (err)
1401                 work_done = work_to_do;
1402
1403         if (work_done < work_to_do) {
1404
1405                 /* Some work done, but not enough to stay in polling,
1406                  * exit polling
1407                  */
1408
1409                 napi_complete(napi);
1410                 vnic_intr_unmask(&enic->intr[intr]);
1411         }
1412
1413         return work_done;
1414 }
1415
1416 static void enic_notify_timer(unsigned long data)
1417 {
1418         struct enic *enic = (struct enic *)data;
1419
1420         enic_notify_check(enic);
1421
1422         mod_timer(&enic->notify_timer,
1423                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1424 }
1425
1426 static void enic_free_intr(struct enic *enic)
1427 {
1428         struct net_device *netdev = enic->netdev;
1429         unsigned int i;
1430
1431         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1432         case VNIC_DEV_INTR_MODE_INTX:
1433                 free_irq(enic->pdev->irq, netdev);
1434                 break;
1435         case VNIC_DEV_INTR_MODE_MSI:
1436                 free_irq(enic->pdev->irq, enic);
1437                 break;
1438         case VNIC_DEV_INTR_MODE_MSIX:
1439                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1440                         if (enic->msix[i].requested)
1441                                 free_irq(enic->msix_entry[i].vector,
1442                                         enic->msix[i].devid);
1443                 break;
1444         default:
1445                 break;
1446         }
1447 }
1448
1449 static int enic_request_intr(struct enic *enic)
1450 {
1451         struct net_device *netdev = enic->netdev;
1452         unsigned int i, intr;
1453         int err = 0;
1454
1455         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1456
1457         case VNIC_DEV_INTR_MODE_INTX:
1458
1459                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1460                         IRQF_SHARED, netdev->name, netdev);
1461                 break;
1462
1463         case VNIC_DEV_INTR_MODE_MSI:
1464
1465                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1466                         0, netdev->name, enic);
1467                 break;
1468
1469         case VNIC_DEV_INTR_MODE_MSIX:
1470
1471                 for (i = 0; i < enic->rq_count; i++) {
1472                         intr = enic_msix_rq_intr(enic, i);
1473                         sprintf(enic->msix[intr].devname,
1474                                 "%.11s-rx-%d", netdev->name, i);
1475                         enic->msix[intr].isr = enic_isr_msix_rq;
1476                         enic->msix[intr].devid = &enic->napi[i];
1477                 }
1478
1479                 for (i = 0; i < enic->wq_count; i++) {
1480                         intr = enic_msix_wq_intr(enic, i);
1481                         sprintf(enic->msix[intr].devname,
1482                                 "%.11s-tx-%d", netdev->name, i);
1483                         enic->msix[intr].isr = enic_isr_msix_wq;
1484                         enic->msix[intr].devid = enic;
1485                 }
1486
1487                 intr = enic_msix_err_intr(enic);
1488                 sprintf(enic->msix[intr].devname,
1489                         "%.11s-err", netdev->name);
1490                 enic->msix[intr].isr = enic_isr_msix_err;
1491                 enic->msix[intr].devid = enic;
1492
1493                 intr = enic_msix_notify_intr(enic);
1494                 sprintf(enic->msix[intr].devname,
1495                         "%.11s-notify", netdev->name);
1496                 enic->msix[intr].isr = enic_isr_msix_notify;
1497                 enic->msix[intr].devid = enic;
1498
1499                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1500                         enic->msix[i].requested = 0;
1501
1502                 for (i = 0; i < enic->intr_count; i++) {
1503                         err = request_irq(enic->msix_entry[i].vector,
1504                                 enic->msix[i].isr, 0,
1505                                 enic->msix[i].devname,
1506                                 enic->msix[i].devid);
1507                         if (err) {
1508                                 enic_free_intr(enic);
1509                                 break;
1510                         }
1511                         enic->msix[i].requested = 1;
1512                 }
1513
1514                 break;
1515
1516         default:
1517                 break;
1518         }
1519
1520         return err;
1521 }
1522
1523 static void enic_synchronize_irqs(struct enic *enic)
1524 {
1525         unsigned int i;
1526
1527         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1528         case VNIC_DEV_INTR_MODE_INTX:
1529         case VNIC_DEV_INTR_MODE_MSI:
1530                 synchronize_irq(enic->pdev->irq);
1531                 break;
1532         case VNIC_DEV_INTR_MODE_MSIX:
1533                 for (i = 0; i < enic->intr_count; i++)
1534                         synchronize_irq(enic->msix_entry[i].vector);
1535                 break;
1536         default:
1537                 break;
1538         }
1539 }
1540
1541 static int enic_dev_notify_set(struct enic *enic)
1542 {
1543         int err;
1544
1545         spin_lock(&enic->devcmd_lock);
1546         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1547         case VNIC_DEV_INTR_MODE_INTX:
1548                 err = vnic_dev_notify_set(enic->vdev,
1549                         enic_legacy_notify_intr());
1550                 break;
1551         case VNIC_DEV_INTR_MODE_MSIX:
1552                 err = vnic_dev_notify_set(enic->vdev,
1553                         enic_msix_notify_intr(enic));
1554                 break;
1555         default:
1556                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1557                 break;
1558         }
1559         spin_unlock(&enic->devcmd_lock);
1560
1561         return err;
1562 }
1563
1564 static void enic_notify_timer_start(struct enic *enic)
1565 {
1566         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1567         case VNIC_DEV_INTR_MODE_MSI:
1568                 mod_timer(&enic->notify_timer, jiffies);
1569                 break;
1570         default:
1571                 /* Using intr for notification for INTx/MSI-X */
1572                 break;
1573         }
1574 }
1575
1576 /* rtnl lock is held, process context */
1577 static int enic_open(struct net_device *netdev)
1578 {
1579         struct enic *enic = netdev_priv(netdev);
1580         unsigned int i;
1581         int err;
1582
1583         err = enic_request_intr(enic);
1584         if (err) {
1585                 netdev_err(netdev, "Unable to request irq.\n");
1586                 return err;
1587         }
1588
1589         err = enic_dev_notify_set(enic);
1590         if (err) {
1591                 netdev_err(netdev,
1592                         "Failed to alloc notify buffer, aborting.\n");
1593                 goto err_out_free_intr;
1594         }
1595
1596         for (i = 0; i < enic->rq_count; i++) {
1597                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1598                 /* Need at least one buffer on ring to get going */
1599                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1600                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1601                         err = -ENOMEM;
1602                         goto err_out_notify_unset;
1603                 }
1604         }
1605
1606         for (i = 0; i < enic->wq_count; i++)
1607                 vnic_wq_enable(&enic->wq[i]);
1608         for (i = 0; i < enic->rq_count; i++)
1609                 vnic_rq_enable(&enic->rq[i]);
1610
1611         if (!enic_is_dynamic(enic))
1612                 enic_dev_add_station_addr(enic);
1613
1614         enic_set_rx_mode(netdev);
1615
1616         netif_wake_queue(netdev);
1617
1618         for (i = 0; i < enic->rq_count; i++)
1619                 napi_enable(&enic->napi[i]);
1620
1621         enic_dev_enable(enic);
1622
1623         for (i = 0; i < enic->intr_count; i++)
1624                 vnic_intr_unmask(&enic->intr[i]);
1625
1626         enic_notify_timer_start(enic);
1627
1628         return 0;
1629
1630 err_out_notify_unset:
1631         enic_dev_notify_unset(enic);
1632 err_out_free_intr:
1633         enic_free_intr(enic);
1634
1635         return err;
1636 }
1637
1638 /* rtnl lock is held, process context */
1639 static int enic_stop(struct net_device *netdev)
1640 {
1641         struct enic *enic = netdev_priv(netdev);
1642         unsigned int i;
1643         int err;
1644
1645         for (i = 0; i < enic->intr_count; i++) {
1646                 vnic_intr_mask(&enic->intr[i]);
1647                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1648         }
1649
1650         enic_synchronize_irqs(enic);
1651
1652         del_timer_sync(&enic->notify_timer);
1653
1654         enic_dev_disable(enic);
1655
1656         for (i = 0; i < enic->rq_count; i++)
1657                 napi_disable(&enic->napi[i]);
1658
1659         netif_carrier_off(netdev);
1660         netif_tx_disable(netdev);
1661
1662         if (!enic_is_dynamic(enic))
1663                 enic_dev_del_station_addr(enic);
1664
1665         for (i = 0; i < enic->wq_count; i++) {
1666                 err = vnic_wq_disable(&enic->wq[i]);
1667                 if (err)
1668                         return err;
1669         }
1670         for (i = 0; i < enic->rq_count; i++) {
1671                 err = vnic_rq_disable(&enic->rq[i]);
1672                 if (err)
1673                         return err;
1674         }
1675
1676         enic_dev_notify_unset(enic);
1677         enic_free_intr(enic);
1678
1679         for (i = 0; i < enic->wq_count; i++)
1680                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1681         for (i = 0; i < enic->rq_count; i++)
1682                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1683         for (i = 0; i < enic->cq_count; i++)
1684                 vnic_cq_clean(&enic->cq[i]);
1685         for (i = 0; i < enic->intr_count; i++)
1686                 vnic_intr_clean(&enic->intr[i]);
1687
1688         return 0;
1689 }
1690
1691 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1692 {
1693         struct enic *enic = netdev_priv(netdev);
1694         int running = netif_running(netdev);
1695
1696         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1697                 return -EINVAL;
1698
1699         if (enic_is_dynamic(enic))
1700                 return -EOPNOTSUPP;
1701
1702         if (running)
1703                 enic_stop(netdev);
1704
1705         netdev->mtu = new_mtu;
1706
1707         if (netdev->mtu > enic->port_mtu)
1708                 netdev_warn(netdev,
1709                         "interface MTU (%d) set higher than port MTU (%d)\n",
1710                         netdev->mtu, enic->port_mtu);
1711
1712         if (running)
1713                 enic_open(netdev);
1714
1715         return 0;
1716 }
1717
1718 static void enic_change_mtu_work(struct work_struct *work)
1719 {
1720         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1721         struct net_device *netdev = enic->netdev;
1722         int new_mtu = vnic_dev_mtu(enic->vdev);
1723         int err;
1724         unsigned int i;
1725
1726         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1727
1728         rtnl_lock();
1729
1730         /* Stop RQ */
1731         del_timer_sync(&enic->notify_timer);
1732
1733         for (i = 0; i < enic->rq_count; i++)
1734                 napi_disable(&enic->napi[i]);
1735
1736         vnic_intr_mask(&enic->intr[0]);
1737         enic_synchronize_irqs(enic);
1738         err = vnic_rq_disable(&enic->rq[0]);
1739         if (err) {
1740                 netdev_err(netdev, "Unable to disable RQ.\n");
1741                 return;
1742         }
1743         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1744         vnic_cq_clean(&enic->cq[0]);
1745         vnic_intr_clean(&enic->intr[0]);
1746
1747         /* Fill RQ with new_mtu-sized buffers */
1748         netdev->mtu = new_mtu;
1749         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1750         /* Need at least one buffer on ring to get going */
1751         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1752                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1753                 return;
1754         }
1755
1756         /* Start RQ */
1757         vnic_rq_enable(&enic->rq[0]);
1758         napi_enable(&enic->napi[0]);
1759         vnic_intr_unmask(&enic->intr[0]);
1760         enic_notify_timer_start(enic);
1761
1762         rtnl_unlock();
1763
1764         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1765 }
1766
1767 #ifdef CONFIG_NET_POLL_CONTROLLER
1768 static void enic_poll_controller(struct net_device *netdev)
1769 {
1770         struct enic *enic = netdev_priv(netdev);
1771         struct vnic_dev *vdev = enic->vdev;
1772         unsigned int i, intr;
1773
1774         switch (vnic_dev_get_intr_mode(vdev)) {
1775         case VNIC_DEV_INTR_MODE_MSIX:
1776                 for (i = 0; i < enic->rq_count; i++) {
1777                         intr = enic_msix_rq_intr(enic, i);
1778                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1779                                 &enic->napi[i]);
1780                 }
1781
1782                 for (i = 0; i < enic->wq_count; i++) {
1783                         intr = enic_msix_wq_intr(enic, i);
1784                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1785                 }
1786
1787                 break;
1788         case VNIC_DEV_INTR_MODE_MSI:
1789                 enic_isr_msi(enic->pdev->irq, enic);
1790                 break;
1791         case VNIC_DEV_INTR_MODE_INTX:
1792                 enic_isr_legacy(enic->pdev->irq, netdev);
1793                 break;
1794         default:
1795                 break;
1796         }
1797 }
1798 #endif
1799
1800 static int enic_dev_wait(struct vnic_dev *vdev,
1801         int (*start)(struct vnic_dev *, int),
1802         int (*finished)(struct vnic_dev *, int *),
1803         int arg)
1804 {
1805         unsigned long time;
1806         int done;
1807         int err;
1808
1809         BUG_ON(in_interrupt());
1810
1811         err = start(vdev, arg);
1812         if (err)
1813                 return err;
1814
1815         /* Wait for func to complete...2 seconds max
1816          */
1817
1818         time = jiffies + (HZ * 2);
1819         do {
1820
1821                 err = finished(vdev, &done);
1822                 if (err)
1823                         return err;
1824
1825                 if (done)
1826                         return 0;
1827
1828                 schedule_timeout_uninterruptible(HZ / 10);
1829
1830         } while (time_after(time, jiffies));
1831
1832         return -ETIMEDOUT;
1833 }
1834
1835 static int enic_dev_open(struct enic *enic)
1836 {
1837         int err;
1838
1839         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1840                 vnic_dev_open_done, 0);
1841         if (err)
1842                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1843                         err);
1844
1845         return err;
1846 }
1847
1848 static int enic_dev_hang_reset(struct enic *enic)
1849 {
1850         int err;
1851
1852         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1853                 vnic_dev_hang_reset_done, 0);
1854         if (err)
1855                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1856                         err);
1857
1858         return err;
1859 }
1860
1861 static int enic_set_rsskey(struct enic *enic)
1862 {
1863         dma_addr_t rss_key_buf_pa;
1864         union vnic_rss_key *rss_key_buf_va = NULL;
1865         union vnic_rss_key rss_key = {
1866                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1867                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1868                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1869                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1870         };
1871         int err;
1872
1873         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1874                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1875         if (!rss_key_buf_va)
1876                 return -ENOMEM;
1877
1878         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1879
1880         spin_lock(&enic->devcmd_lock);
1881         err = enic_set_rss_key(enic,
1882                 rss_key_buf_pa,
1883                 sizeof(union vnic_rss_key));
1884         spin_unlock(&enic->devcmd_lock);
1885
1886         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1887                 rss_key_buf_va, rss_key_buf_pa);
1888
1889         return err;
1890 }
1891
1892 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1893 {
1894         dma_addr_t rss_cpu_buf_pa;
1895         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1896         unsigned int i;
1897         int err;
1898
1899         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1900                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1901         if (!rss_cpu_buf_va)
1902                 return -ENOMEM;
1903
1904         for (i = 0; i < (1 << rss_hash_bits); i++)
1905                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1906
1907         spin_lock(&enic->devcmd_lock);
1908         err = enic_set_rss_cpu(enic,
1909                 rss_cpu_buf_pa,
1910                 sizeof(union vnic_rss_cpu));
1911         spin_unlock(&enic->devcmd_lock);
1912
1913         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1914                 rss_cpu_buf_va, rss_cpu_buf_pa);
1915
1916         return err;
1917 }
1918
1919 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1920         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1921 {
1922         const u8 tso_ipid_split_en = 0;
1923         const u8 ig_vlan_strip_en = 1;
1924         int err;
1925
1926         /* Enable VLAN tag stripping.
1927         */
1928
1929         spin_lock(&enic->devcmd_lock);
1930         err = enic_set_nic_cfg(enic,
1931                 rss_default_cpu, rss_hash_type,
1932                 rss_hash_bits, rss_base_cpu,
1933                 rss_enable, tso_ipid_split_en,
1934                 ig_vlan_strip_en);
1935         spin_unlock(&enic->devcmd_lock);
1936
1937         return err;
1938 }
1939
1940 static int enic_set_rss_nic_cfg(struct enic *enic)
1941 {
1942         struct device *dev = enic_get_dev(enic);
1943         const u8 rss_default_cpu = 0;
1944         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1945                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1946                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1947                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1948         const u8 rss_hash_bits = 7;
1949         const u8 rss_base_cpu = 0;
1950         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1951
1952         if (rss_enable) {
1953                 if (!enic_set_rsskey(enic)) {
1954                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1955                                 rss_enable = 0;
1956                                 dev_warn(dev, "RSS disabled, "
1957                                         "Failed to set RSS cpu indirection table.");
1958                         }
1959                 } else {
1960                         rss_enable = 0;
1961                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1962                 }
1963         }
1964
1965         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1966                 rss_hash_bits, rss_base_cpu, rss_enable);
1967 }
1968
1969 static void enic_reset(struct work_struct *work)
1970 {
1971         struct enic *enic = container_of(work, struct enic, reset);
1972
1973         if (!netif_running(enic->netdev))
1974                 return;
1975
1976         rtnl_lock();
1977
1978         enic_dev_hang_notify(enic);
1979         enic_stop(enic->netdev);
1980         enic_dev_hang_reset(enic);
1981         enic_reset_addr_lists(enic);
1982         enic_init_vnic_resources(enic);
1983         enic_set_rss_nic_cfg(enic);
1984         enic_dev_set_ig_vlan_rewrite_mode(enic);
1985         enic_open(enic->netdev);
1986
1987         rtnl_unlock();
1988 }
1989
1990 static int enic_set_intr_mode(struct enic *enic)
1991 {
1992         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
1993         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
1994         unsigned int i;
1995
1996         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1997          * on system capabilities.
1998          *
1999          * Try MSI-X first
2000          *
2001          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2002          * (the second to last INTR is used for WQ/RQ errors)
2003          * (the last INTR is used for notifications)
2004          */
2005
2006         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2007         for (i = 0; i < n + m + 2; i++)
2008                 enic->msix_entry[i].entry = i;
2009
2010         /* Use multiple RQs if RSS is enabled
2011          */
2012
2013         if (ENIC_SETTING(enic, RSS) &&
2014             enic->config.intr_mode < 1 &&
2015             enic->rq_count >= n &&
2016             enic->wq_count >= m &&
2017             enic->cq_count >= n + m &&
2018             enic->intr_count >= n + m + 2) {
2019
2020                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2021
2022                         enic->rq_count = n;
2023                         enic->wq_count = m;
2024                         enic->cq_count = n + m;
2025                         enic->intr_count = n + m + 2;
2026
2027                         vnic_dev_set_intr_mode(enic->vdev,
2028                                 VNIC_DEV_INTR_MODE_MSIX);
2029
2030                         return 0;
2031                 }
2032         }
2033
2034         if (enic->config.intr_mode < 1 &&
2035             enic->rq_count >= 1 &&
2036             enic->wq_count >= m &&
2037             enic->cq_count >= 1 + m &&
2038             enic->intr_count >= 1 + m + 2) {
2039                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2040
2041                         enic->rq_count = 1;
2042                         enic->wq_count = m;
2043                         enic->cq_count = 1 + m;
2044                         enic->intr_count = 1 + m + 2;
2045
2046                         vnic_dev_set_intr_mode(enic->vdev,
2047                                 VNIC_DEV_INTR_MODE_MSIX);
2048
2049                         return 0;
2050                 }
2051         }
2052
2053         /* Next try MSI
2054          *
2055          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2056          */
2057
2058         if (enic->config.intr_mode < 2 &&
2059             enic->rq_count >= 1 &&
2060             enic->wq_count >= 1 &&
2061             enic->cq_count >= 2 &&
2062             enic->intr_count >= 1 &&
2063             !pci_enable_msi(enic->pdev)) {
2064
2065                 enic->rq_count = 1;
2066                 enic->wq_count = 1;
2067                 enic->cq_count = 2;
2068                 enic->intr_count = 1;
2069
2070                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2071
2072                 return 0;
2073         }
2074
2075         /* Next try INTx
2076          *
2077          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2078          * (the first INTR is used for WQ/RQ)
2079          * (the second INTR is used for WQ/RQ errors)
2080          * (the last INTR is used for notifications)
2081          */
2082
2083         if (enic->config.intr_mode < 3 &&
2084             enic->rq_count >= 1 &&
2085             enic->wq_count >= 1 &&
2086             enic->cq_count >= 2 &&
2087             enic->intr_count >= 3) {
2088
2089                 enic->rq_count = 1;
2090                 enic->wq_count = 1;
2091                 enic->cq_count = 2;
2092                 enic->intr_count = 3;
2093
2094                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2095
2096                 return 0;
2097         }
2098
2099         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2100
2101         return -EINVAL;
2102 }
2103
2104 static void enic_clear_intr_mode(struct enic *enic)
2105 {
2106         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2107         case VNIC_DEV_INTR_MODE_MSIX:
2108                 pci_disable_msix(enic->pdev);
2109                 break;
2110         case VNIC_DEV_INTR_MODE_MSI:
2111                 pci_disable_msi(enic->pdev);
2112                 break;
2113         default:
2114                 break;
2115         }
2116
2117         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2118 }
2119
2120 static const struct net_device_ops enic_netdev_dynamic_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_rx_mode        = enic_set_rx_mode,
2127         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2128         .ndo_change_mtu         = enic_change_mtu,
2129         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2130         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2131         .ndo_tx_timeout         = enic_tx_timeout,
2132         .ndo_set_vf_port        = enic_set_vf_port,
2133         .ndo_get_vf_port        = enic_get_vf_port,
2134         .ndo_set_vf_mac         = enic_set_vf_mac,
2135 #ifdef CONFIG_NET_POLL_CONTROLLER
2136         .ndo_poll_controller    = enic_poll_controller,
2137 #endif
2138 };
2139
2140 static const struct net_device_ops enic_netdev_ops = {
2141         .ndo_open               = enic_open,
2142         .ndo_stop               = enic_stop,
2143         .ndo_start_xmit         = enic_hard_start_xmit,
2144         .ndo_get_stats64        = enic_get_stats,
2145         .ndo_validate_addr      = eth_validate_addr,
2146         .ndo_set_mac_address    = enic_set_mac_address,
2147         .ndo_set_rx_mode        = enic_set_rx_mode,
2148         .ndo_change_mtu         = enic_change_mtu,
2149         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2150         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2151         .ndo_tx_timeout         = enic_tx_timeout,
2152         .ndo_set_vf_port        = enic_set_vf_port,
2153         .ndo_get_vf_port        = enic_get_vf_port,
2154         .ndo_set_vf_mac         = enic_set_vf_mac,
2155 #ifdef CONFIG_NET_POLL_CONTROLLER
2156         .ndo_poll_controller    = enic_poll_controller,
2157 #endif
2158 };
2159
2160 static void enic_dev_deinit(struct enic *enic)
2161 {
2162         unsigned int i;
2163
2164         for (i = 0; i < enic->rq_count; i++)
2165                 netif_napi_del(&enic->napi[i]);
2166
2167         enic_free_vnic_resources(enic);
2168         enic_clear_intr_mode(enic);
2169 }
2170
2171 static int enic_dev_init(struct enic *enic)
2172 {
2173         struct device *dev = enic_get_dev(enic);
2174         struct net_device *netdev = enic->netdev;
2175         unsigned int i;
2176         int err;
2177
2178         /* Get interrupt coalesce timer info */
2179         err = enic_dev_intr_coal_timer_info(enic);
2180         if (err) {
2181                 dev_warn(dev, "Using default conversion factor for "
2182                         "interrupt coalesce timer\n");
2183                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2184         }
2185
2186         /* Get vNIC configuration
2187          */
2188
2189         err = enic_get_vnic_config(enic);
2190         if (err) {
2191                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2192                 return err;
2193         }
2194
2195         /* Get available resource counts
2196          */
2197
2198         enic_get_res_counts(enic);
2199
2200         /* Set interrupt mode based on resource counts and system
2201          * capabilities
2202          */
2203
2204         err = enic_set_intr_mode(enic);
2205         if (err) {
2206                 dev_err(dev, "Failed to set intr mode based on resource "
2207                         "counts and system capabilities, aborting\n");
2208                 return err;
2209         }
2210
2211         /* Allocate and configure vNIC resources
2212          */
2213
2214         err = enic_alloc_vnic_resources(enic);
2215         if (err) {
2216                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2217                 goto err_out_free_vnic_resources;
2218         }
2219
2220         enic_init_vnic_resources(enic);
2221
2222         err = enic_set_rss_nic_cfg(enic);
2223         if (err) {
2224                 dev_err(dev, "Failed to config nic, aborting\n");
2225                 goto err_out_free_vnic_resources;
2226         }
2227
2228         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2229         default:
2230                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2231                 break;
2232         case VNIC_DEV_INTR_MODE_MSIX:
2233                 for (i = 0; i < enic->rq_count; i++)
2234                         netif_napi_add(netdev, &enic->napi[i],
2235                                 enic_poll_msix, 64);
2236                 break;
2237         }
2238
2239         return 0;
2240
2241 err_out_free_vnic_resources:
2242         enic_clear_intr_mode(enic);
2243         enic_free_vnic_resources(enic);
2244
2245         return err;
2246 }
2247
2248 static void enic_iounmap(struct enic *enic)
2249 {
2250         unsigned int i;
2251
2252         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2253                 if (enic->bar[i].vaddr)
2254                         iounmap(enic->bar[i].vaddr);
2255 }
2256
2257 static int __devinit enic_probe(struct pci_dev *pdev,
2258         const struct pci_device_id *ent)
2259 {
2260         struct device *dev = &pdev->dev;
2261         struct net_device *netdev;
2262         struct enic *enic;
2263         int using_dac = 0;
2264         unsigned int i;
2265         int err;
2266         int num_pps = 1;
2267 #ifdef CONFIG_PCI_IOV
2268         int pos = 0;
2269 #endif
2270
2271         /* Allocate net device structure and initialize.  Private
2272          * instance data is initialized to zero.
2273          */
2274
2275         netdev = alloc_etherdev(sizeof(struct enic));
2276         if (!netdev) {
2277                 pr_err("Etherdev alloc failed, aborting\n");
2278                 return -ENOMEM;
2279         }
2280
2281         pci_set_drvdata(pdev, netdev);
2282
2283         SET_NETDEV_DEV(netdev, &pdev->dev);
2284
2285         enic = netdev_priv(netdev);
2286         enic->netdev = netdev;
2287         enic->pdev = pdev;
2288
2289         /* Setup PCI resources
2290          */
2291
2292         err = pci_enable_device_mem(pdev);
2293         if (err) {
2294                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2295                 goto err_out_free_netdev;
2296         }
2297
2298         err = pci_request_regions(pdev, DRV_NAME);
2299         if (err) {
2300                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2301                 goto err_out_disable_device;
2302         }
2303
2304         pci_set_master(pdev);
2305
2306         /* Query PCI controller on system for DMA addressing
2307          * limitation for the device.  Try 40-bit first, and
2308          * fail to 32-bit.
2309          */
2310
2311         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2312         if (err) {
2313                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2314                 if (err) {
2315                         dev_err(dev, "No usable DMA configuration, aborting\n");
2316                         goto err_out_release_regions;
2317                 }
2318                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2319                 if (err) {
2320                         dev_err(dev, "Unable to obtain %u-bit DMA "
2321                                 "for consistent allocations, aborting\n", 32);
2322                         goto err_out_release_regions;
2323                 }
2324         } else {
2325                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2326                 if (err) {
2327                         dev_err(dev, "Unable to obtain %u-bit DMA "
2328                                 "for consistent allocations, aborting\n", 40);
2329                         goto err_out_release_regions;
2330                 }
2331                 using_dac = 1;
2332         }
2333
2334         /* Map vNIC resources from BAR0-5
2335          */
2336
2337         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2338                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2339                         continue;
2340                 enic->bar[i].len = pci_resource_len(pdev, i);
2341                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2342                 if (!enic->bar[i].vaddr) {
2343                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2344                         err = -ENODEV;
2345                         goto err_out_iounmap;
2346                 }
2347                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2348         }
2349
2350         /* Register vNIC device
2351          */
2352
2353         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2354                 ARRAY_SIZE(enic->bar));
2355         if (!enic->vdev) {
2356                 dev_err(dev, "vNIC registration failed, aborting\n");
2357                 err = -ENODEV;
2358                 goto err_out_iounmap;
2359         }
2360
2361 #ifdef CONFIG_PCI_IOV
2362         /* Get number of subvnics */
2363         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2364         if (pos) {
2365                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2366                         (u16 *)&enic->num_vfs);
2367                 if (enic->num_vfs) {
2368                         err = pci_enable_sriov(pdev, enic->num_vfs);
2369                         if (err) {
2370                                 dev_err(dev, "SRIOV enable failed, aborting."
2371                                         " pci_enable_sriov() returned %d\n",
2372                                         err);
2373                                 goto err_out_vnic_unregister;
2374                         }
2375                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2376                         num_pps = enic->num_vfs;
2377                 }
2378         }
2379
2380 #endif
2381         /* Allocate structure for port profiles */
2382         enic->pp = kzalloc(num_pps * sizeof(*enic->pp), GFP_KERNEL);
2383         if (!enic->pp) {
2384                 pr_err("port profile alloc failed, aborting\n");
2385                 err = -ENOMEM;
2386                 goto err_out_disable_sriov;
2387         }
2388
2389         /* Issue device open to get device in known state
2390          */
2391
2392         err = enic_dev_open(enic);
2393         if (err) {
2394                 dev_err(dev, "vNIC dev open failed, aborting\n");
2395                 goto err_out_free_pp;
2396         }
2397
2398         /* Setup devcmd lock
2399          */
2400
2401         spin_lock_init(&enic->devcmd_lock);
2402
2403         /*
2404          * Set ingress vlan rewrite mode before vnic initialization
2405          */
2406
2407         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2408         if (err) {
2409                 dev_err(dev,
2410                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2411                 goto err_out_dev_close;
2412         }
2413
2414         /* Issue device init to initialize the vnic-to-switch link.
2415          * We'll start with carrier off and wait for link UP
2416          * notification later to turn on carrier.  We don't need
2417          * to wait here for the vnic-to-switch link initialization
2418          * to complete; link UP notification is the indication that
2419          * the process is complete.
2420          */
2421
2422         netif_carrier_off(netdev);
2423
2424         /* Do not call dev_init for a dynamic vnic.
2425          * For a dynamic vnic, init_prov_info will be
2426          * called later by an upper layer.
2427          */
2428
2429         if (!enic_is_dynamic(enic)) {
2430                 err = vnic_dev_init(enic->vdev, 0);
2431                 if (err) {
2432                         dev_err(dev, "vNIC dev init failed, aborting\n");
2433                         goto err_out_dev_close;
2434                 }
2435         }
2436
2437         err = enic_dev_init(enic);
2438         if (err) {
2439                 dev_err(dev, "Device initialization failed, aborting\n");
2440                 goto err_out_dev_close;
2441         }
2442
2443         /* Setup notification timer, HW reset task, and wq locks
2444          */
2445
2446         init_timer(&enic->notify_timer);
2447         enic->notify_timer.function = enic_notify_timer;
2448         enic->notify_timer.data = (unsigned long)enic;
2449
2450         INIT_WORK(&enic->reset, enic_reset);
2451         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2452
2453         for (i = 0; i < enic->wq_count; i++)
2454                 spin_lock_init(&enic->wq_lock[i]);
2455
2456         /* Register net device
2457          */
2458
2459         enic->port_mtu = enic->config.mtu;
2460         (void)enic_change_mtu(netdev, enic->port_mtu);
2461
2462 #ifdef CONFIG_PCI_IOV
2463         if (enic_is_dynamic(enic) && pdev->is_virtfn &&
2464                 is_zero_ether_addr(enic->mac_addr))
2465                 random_ether_addr(enic->mac_addr);
2466 #endif
2467
2468         err = enic_set_mac_addr(netdev, enic->mac_addr);
2469         if (err) {
2470                 dev_err(dev, "Invalid MAC address, aborting\n");
2471                 goto err_out_dev_deinit;
2472         }
2473
2474         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2475         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2476
2477         if (enic_is_dynamic(enic))
2478                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2479         else
2480                 netdev->netdev_ops = &enic_netdev_ops;
2481
2482         netdev->watchdog_timeo = 2 * HZ;
2483         netdev->ethtool_ops = &enic_ethtool_ops;
2484
2485         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2486         if (ENIC_SETTING(enic, LOOP)) {
2487                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2488                 enic->loop_enable = 1;
2489                 enic->loop_tag = enic->config.loop_tag;
2490                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2491         }
2492         if (ENIC_SETTING(enic, TXCSUM))
2493                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2494         if (ENIC_SETTING(enic, TSO))
2495                 netdev->hw_features |= NETIF_F_TSO |
2496                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2497         if (ENIC_SETTING(enic, RXCSUM))
2498                 netdev->hw_features |= NETIF_F_RXCSUM;
2499
2500         netdev->features |= netdev->hw_features;
2501
2502         if (using_dac)
2503                 netdev->features |= NETIF_F_HIGHDMA;
2504
2505         netdev->priv_flags |= IFF_UNICAST_FLT;
2506
2507         err = register_netdev(netdev);
2508         if (err) {
2509                 dev_err(dev, "Cannot register net device, aborting\n");
2510                 goto err_out_dev_deinit;
2511         }
2512
2513         return 0;
2514
2515 err_out_dev_deinit:
2516         enic_dev_deinit(enic);
2517 err_out_dev_close:
2518         vnic_dev_close(enic->vdev);
2519 err_out_free_pp:
2520         kfree(enic->pp);
2521 err_out_disable_sriov:
2522 #ifdef CONFIG_PCI_IOV
2523         if (enic_sriov_enabled(enic)) {
2524                 pci_disable_sriov(pdev);
2525                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2526         }
2527 err_out_vnic_unregister:
2528         vnic_dev_unregister(enic->vdev);
2529 #endif
2530 err_out_iounmap:
2531         enic_iounmap(enic);
2532 err_out_release_regions:
2533         pci_release_regions(pdev);
2534 err_out_disable_device:
2535         pci_disable_device(pdev);
2536 err_out_free_netdev:
2537         pci_set_drvdata(pdev, NULL);
2538         free_netdev(netdev);
2539
2540         return err;
2541 }
2542
2543 static void __devexit enic_remove(struct pci_dev *pdev)
2544 {
2545         struct net_device *netdev = pci_get_drvdata(pdev);
2546
2547         if (netdev) {
2548                 struct enic *enic = netdev_priv(netdev);
2549
2550                 cancel_work_sync(&enic->reset);
2551                 cancel_work_sync(&enic->change_mtu_work);
2552                 unregister_netdev(netdev);
2553                 enic_dev_deinit(enic);
2554                 vnic_dev_close(enic->vdev);
2555 #ifdef CONFIG_PCI_IOV
2556                 if (enic_sriov_enabled(enic)) {
2557                         pci_disable_sriov(pdev);
2558                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2559                 }
2560 #endif
2561                 kfree(enic->pp);
2562                 vnic_dev_unregister(enic->vdev);
2563                 enic_iounmap(enic);
2564                 pci_release_regions(pdev);
2565                 pci_disable_device(pdev);
2566                 pci_set_drvdata(pdev, NULL);
2567                 free_netdev(netdev);
2568         }
2569 }
2570
2571 static struct pci_driver enic_driver = {
2572         .name = DRV_NAME,
2573         .id_table = enic_id_table,
2574         .probe = enic_probe,
2575         .remove = __devexit_p(enic_remove),
2576 };
2577
2578 static int __init enic_init_module(void)
2579 {
2580         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2581
2582         return pci_register_driver(&enic_driver);
2583 }
2584
2585 static void __exit enic_cleanup_module(void)
2586 {
2587         pci_unregister_driver(&enic_driver);
2588 }
2589
2590 module_init(enic_init_module);
2591 module_exit(enic_cleanup_module);