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 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  61
  62 /* Supported devices */
  63 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  64         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  65         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  66         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  67         { 0, }  /* end of table */
  68 };
  69
  70 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  71 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  72 MODULE_LICENSE("GPL");
  73 MODULE_VERSION(DRV_VERSION);
  74 MODULE_DEVICE_TABLE(pci, enic_id_table);
  75
  76 struct enic_stat {
  77         char name[ETH_GSTRING_LEN];
  78         unsigned int offset;
  79 };
  80
  81 #define ENIC_TX_STAT(stat)      \
  82         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  83 #define ENIC_RX_STAT(stat)      \
  84         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  85
  86 static const struct enic_stat enic_tx_stats[] = {
  87         ENIC_TX_STAT(tx_frames_ok),
  88         ENIC_TX_STAT(tx_unicast_frames_ok),
  89         ENIC_TX_STAT(tx_multicast_frames_ok),
  90         ENIC_TX_STAT(tx_broadcast_frames_ok),
  91         ENIC_TX_STAT(tx_bytes_ok),
  92         ENIC_TX_STAT(tx_unicast_bytes_ok),
  93         ENIC_TX_STAT(tx_multicast_bytes_ok),
  94         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  95         ENIC_TX_STAT(tx_drops),
  96         ENIC_TX_STAT(tx_errors),
  97         ENIC_TX_STAT(tx_tso),
  98 };
  99
 100 static const struct enic_stat enic_rx_stats[] = {
 101         ENIC_RX_STAT(rx_frames_ok),
 102         ENIC_RX_STAT(rx_frames_total),
 103         ENIC_RX_STAT(rx_unicast_frames_ok),
 104         ENIC_RX_STAT(rx_multicast_frames_ok),
 105         ENIC_RX_STAT(rx_broadcast_frames_ok),
 106         ENIC_RX_STAT(rx_bytes_ok),
 107         ENIC_RX_STAT(rx_unicast_bytes_ok),
 108         ENIC_RX_STAT(rx_multicast_bytes_ok),
 109         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 110         ENIC_RX_STAT(rx_drop),
 111         ENIC_RX_STAT(rx_no_bufs),
 112         ENIC_RX_STAT(rx_errors),
 113         ENIC_RX_STAT(rx_rss),
 114         ENIC_RX_STAT(rx_crc_errors),
 115         ENIC_RX_STAT(rx_frames_64),
 116         ENIC_RX_STAT(rx_frames_127),
 117         ENIC_RX_STAT(rx_frames_255),
 118         ENIC_RX_STAT(rx_frames_511),
 119         ENIC_RX_STAT(rx_frames_1023),
 120         ENIC_RX_STAT(rx_frames_1518),
 121         ENIC_RX_STAT(rx_frames_to_max),
 122 };
 123
 124 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 125 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 126
 127 int enic_is_dynamic(struct enic *enic)
 128 {
 129         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 130 }
 131
 132 int enic_sriov_enabled(struct enic *enic)
 133 {
 134         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 135 }
 136
 137 static int enic_is_sriov_vf(struct enic *enic)
 138 {
 139         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 140 }
 141
 142 int enic_is_valid_vf(struct enic *enic, int vf)
 143 {
 144 #ifdef CONFIG_PCI_IOV
 145         return vf >= 0 && vf < enic->num_vfs;
 146 #else
 147         return 0;
 148 #endif
 149 }
 150
 151 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 152 {
 153         return rq;
 154 }
 155
 156 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 157 {
 158         return enic->rq_count + wq;
 159 }
 160
 161 static inline unsigned int enic_legacy_io_intr(void)
 162 {
 163         return 0;
 164 }
 165
 166 static inline unsigned int enic_legacy_err_intr(void)
 167 {
 168         return 1;
 169 }
 170
 171 static inline unsigned int enic_legacy_notify_intr(void)
 172 {
 173         return 2;
 174 }
 175
 176 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 177 {
 178         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 179 }
 180
 181 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 182 {
 183         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 184 }
 185
 186 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 187 {
 188         return enic->rq_count + enic->wq_count;
 189 }
 190
 191 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 192 {
 193         return enic->rq_count + enic->wq_count + 1;
 194 }
 195
 196 static int enic_get_settings(struct net_device *netdev,
 197         struct ethtool_cmd *ecmd)
 198 {
 199         struct enic *enic = netdev_priv(netdev);
 200
 201         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 202         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 203         ecmd->port = PORT_FIBRE;
 204         ecmd->transceiver = XCVR_EXTERNAL;
 205
 206         if (netif_carrier_ok(netdev)) {
 207                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 208                 ecmd->duplex = DUPLEX_FULL;
 209         } else {
 210                 ethtool_cmd_speed_set(ecmd, -1);
 211                 ecmd->duplex = -1;
 212         }
 213
 214         ecmd->autoneg = AUTONEG_DISABLE;
 215
 216         return 0;
 217 }
 218
 219 static void enic_get_drvinfo(struct net_device *netdev,
 220         struct ethtool_drvinfo *drvinfo)
 221 {
 222         struct enic *enic = netdev_priv(netdev);
 223         struct vnic_devcmd_fw_info *fw_info;
 224
 225         enic_dev_fw_info(enic, &fw_info);
 226
 227         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 228         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 229         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 230                 sizeof(drvinfo->fw_version));
 231         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 232                 sizeof(drvinfo->bus_info));
 233 }
 234
 235 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 236 {
 237         unsigned int i;
 238
 239         switch (stringset) {
 240         case ETH_SS_STATS:
 241                 for (i = 0; i < enic_n_tx_stats; i++) {
 242                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 243                         data += ETH_GSTRING_LEN;
 244                 }
 245                 for (i = 0; i < enic_n_rx_stats; i++) {
 246                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 247                         data += ETH_GSTRING_LEN;
 248                 }
 249                 break;
 250         }
 251 }
 252
 253 static int enic_get_sset_count(struct net_device *netdev, int sset)
 254 {
 255         switch (sset) {
 256         case ETH_SS_STATS:
 257                 return enic_n_tx_stats + enic_n_rx_stats;
 258         default:
 259                 return -EOPNOTSUPP;
 260         }
 261 }
 262
 263 static void enic_get_ethtool_stats(struct net_device *netdev,
 264         struct ethtool_stats *stats, u64 *data)
 265 {
 266         struct enic *enic = netdev_priv(netdev);
 267         struct vnic_stats *vstats;
 268         unsigned int i;
 269
 270         enic_dev_stats_dump(enic, &vstats);
 271
 272         for (i = 0; i < enic_n_tx_stats; i++)
 273                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 274         for (i = 0; i < enic_n_rx_stats; i++)
 275                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 276 }
 277
 278 static u32 enic_get_msglevel(struct net_device *netdev)
 279 {
 280         struct enic *enic = netdev_priv(netdev);
 281         return enic->msg_enable;
 282 }
 283
 284 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 285 {
 286         struct enic *enic = netdev_priv(netdev);
 287         enic->msg_enable = value;
 288 }
 289
 290 static int enic_get_coalesce(struct net_device *netdev,
 291         struct ethtool_coalesce *ecmd)
 292 {
 293         struct enic *enic = netdev_priv(netdev);
 294
 295         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 296         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 297
 298         return 0;
 299 }
 300
 301 static int enic_set_coalesce(struct net_device *netdev,
 302         struct ethtool_coalesce *ecmd)
 303 {
 304         struct enic *enic = netdev_priv(netdev);
 305         u32 tx_coalesce_usecs;
 306         u32 rx_coalesce_usecs;
 307         unsigned int i, intr;
 308
 309         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 310                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 311         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 312                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 313
 314         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 315         case VNIC_DEV_INTR_MODE_INTX:
 316                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 317                         return -EINVAL;
 318
 319                 intr = enic_legacy_io_intr();
 320                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 321                         tx_coalesce_usecs);
 322                 break;
 323         case VNIC_DEV_INTR_MODE_MSI:
 324                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 325                         return -EINVAL;
 326
 327                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 328                         tx_coalesce_usecs);
 329                 break;
 330         case VNIC_DEV_INTR_MODE_MSIX:
 331                 for (i = 0; i < enic->wq_count; i++) {
 332                         intr = enic_msix_wq_intr(enic, i);
 333                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 334                                 tx_coalesce_usecs);
 335                 }
 336
 337                 for (i = 0; i < enic->rq_count; i++) {
 338                         intr = enic_msix_rq_intr(enic, i);
 339                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 340                                 rx_coalesce_usecs);
 341                 }
 342
 343                 break;
 344         default:
 345                 break;
 346         }
 347
 348         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 349         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 350
 351         return 0;
 352 }
 353
 354 static const struct ethtool_ops enic_ethtool_ops = {
 355         .get_settings = enic_get_settings,
 356         .get_drvinfo = enic_get_drvinfo,
 357         .get_msglevel = enic_get_msglevel,
 358         .set_msglevel = enic_set_msglevel,
 359         .get_link = ethtool_op_get_link,
 360         .get_strings = enic_get_strings,
 361         .get_sset_count = enic_get_sset_count,
 362         .get_ethtool_stats = enic_get_ethtool_stats,
 363         .get_coalesce = enic_get_coalesce,
 364         .set_coalesce = enic_set_coalesce,
 365 };
 366
 367 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 368 {
 369         struct enic *enic = vnic_dev_priv(wq->vdev);
 370
 371         if (buf->sop)
 372                 pci_unmap_single(enic->pdev, buf->dma_addr,
 373                         buf->len, PCI_DMA_TODEVICE);
 374         else
 375                 pci_unmap_page(enic->pdev, buf->dma_addr,
 376                         buf->len, PCI_DMA_TODEVICE);
 377
 378         if (buf->os_buf)
 379                 dev_kfree_skb_any(buf->os_buf);
 380 }
 381
 382 static void enic_wq_free_buf(struct vnic_wq *wq,
 383         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 384 {
 385         enic_free_wq_buf(wq, buf);
 386 }
 387
 388 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 389         u8 type, u16 q_number, u16 completed_index, void *opaque)
 390 {
 391         struct enic *enic = vnic_dev_priv(vdev);
 392
 393         spin_lock(&enic->wq_lock[q_number]);
 394
 395         vnic_wq_service(&enic->wq[q_number], cq_desc,
 396                 completed_index, enic_wq_free_buf,
 397                 opaque);
 398
 399         if (netif_queue_stopped(enic->netdev) &&
 400             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 401             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 402                 netif_wake_queue(enic->netdev);
 403
 404         spin_unlock(&enic->wq_lock[q_number]);
 405
 406         return 0;
 407 }
 408
 409 static void enic_log_q_error(struct enic *enic)
 410 {
 411         unsigned int i;
 412         u32 error_status;
 413
 414         for (i = 0; i < enic->wq_count; i++) {
 415                 error_status = vnic_wq_error_status(&enic->wq[i]);
 416                 if (error_status)
 417                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 418                                 i, error_status);
 419         }
 420
 421         for (i = 0; i < enic->rq_count; i++) {
 422                 error_status = vnic_rq_error_status(&enic->rq[i]);
 423                 if (error_status)
 424                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 425                                 i, error_status);
 426         }
 427 }
 428
 429 static void enic_msglvl_check(struct enic *enic)
 430 {
 431         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 432
 433         if (msg_enable != enic->msg_enable) {
 434                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 435                         enic->msg_enable, msg_enable);
 436                 enic->msg_enable = msg_enable;
 437         }
 438 }
 439
 440 static void enic_mtu_check(struct enic *enic)
 441 {
 442         u32 mtu = vnic_dev_mtu(enic->vdev);
 443         struct net_device *netdev = enic->netdev;
 444
 445         if (mtu && mtu != enic->port_mtu) {
 446                 enic->port_mtu = mtu;
 447                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 448                         mtu = max_t(int, ENIC_MIN_MTU,
 449                                 min_t(int, ENIC_MAX_MTU, mtu));
 450                         if (mtu != netdev->mtu)
 451                                 schedule_work(&enic->change_mtu_work);
 452                 } else {
 453                         if (mtu < netdev->mtu)
 454                                 netdev_warn(netdev,
 455                                         "interface MTU (%d) set higher "
 456                                         "than switch port MTU (%d)\n",
 457                                         netdev->mtu, mtu);
 458                 }
 459         }
 460 }
 461
 462 static void enic_link_check(struct enic *enic)
 463 {
 464         int link_status = vnic_dev_link_status(enic->vdev);
 465         int carrier_ok = netif_carrier_ok(enic->netdev);
 466
 467         if (link_status && !carrier_ok) {
 468                 netdev_info(enic->netdev, "Link UP\n");
 469                 netif_carrier_on(enic->netdev);
 470         } else if (!link_status && carrier_ok) {
 471                 netdev_info(enic->netdev, "Link DOWN\n");
 472                 netif_carrier_off(enic->netdev);
 473         }
 474 }
 475
 476 static void enic_notify_check(struct enic *enic)
 477 {
 478         enic_msglvl_check(enic);
 479         enic_mtu_check(enic);
 480         enic_link_check(enic);
 481 }
 482
 483 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 484
 485 static irqreturn_t enic_isr_legacy(int irq, void *data)
 486 {
 487         struct net_device *netdev = data;
 488         struct enic *enic = netdev_priv(netdev);
 489         unsigned int io_intr = enic_legacy_io_intr();
 490         unsigned int err_intr = enic_legacy_err_intr();
 491         unsigned int notify_intr = enic_legacy_notify_intr();
 492         u32 pba;
 493
 494         vnic_intr_mask(&enic->intr[io_intr]);
 495
 496         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 497         if (!pba) {
 498                 vnic_intr_unmask(&enic->intr[io_intr]);
 499                 return IRQ_NONE;        /* not our interrupt */
 500         }
 501
 502         if (ENIC_TEST_INTR(pba, notify_intr)) {
 503                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 504                 enic_notify_check(enic);
 505         }
 506
 507         if (ENIC_TEST_INTR(pba, err_intr)) {
 508                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 509                 enic_log_q_error(enic);
 510                 /* schedule recovery from WQ/RQ error */
 511                 schedule_work(&enic->reset);
 512                 return IRQ_HANDLED;
 513         }
 514
 515         if (ENIC_TEST_INTR(pba, io_intr)) {
 516                 if (napi_schedule_prep(&enic->napi[0]))
 517                         __napi_schedule(&enic->napi[0]);
 518         } else {
 519                 vnic_intr_unmask(&enic->intr[io_intr]);
 520         }
 521
 522         return IRQ_HANDLED;
 523 }
 524
 525 static irqreturn_t enic_isr_msi(int irq, void *data)
 526 {
 527         struct enic *enic = data;
 528
 529         /* With MSI, there is no sharing of interrupts, so this is
 530          * our interrupt and there is no need to ack it.  The device
 531          * is not providing per-vector masking, so the OS will not
 532          * write to PCI config space to mask/unmask the interrupt.
 533          * We're using mask_on_assertion for MSI, so the device
 534          * automatically masks the interrupt when the interrupt is
 535          * generated.  Later, when exiting polling, the interrupt
 536          * will be unmasked (see enic_poll).
 537          *
 538          * Also, the device uses the same PCIe Traffic Class (TC)
 539          * for Memory Write data and MSI, so there are no ordering
 540          * issues; the MSI will always arrive at the Root Complex
 541          * _after_ corresponding Memory Writes (i.e. descriptor
 542          * writes).
 543          */
 544
 545         napi_schedule(&enic->napi[0]);
 546
 547         return IRQ_HANDLED;
 548 }
 549
 550 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 551 {
 552         struct napi_struct *napi = data;
 553
 554         /* schedule NAPI polling for RQ cleanup */
 555         napi_schedule(napi);
 556
 557         return IRQ_HANDLED;
 558 }
 559
 560 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 561 {
 562         struct enic *enic = data;
 563         unsigned int cq = enic_cq_wq(enic, 0);
 564         unsigned int intr = enic_msix_wq_intr(enic, 0);
 565         unsigned int wq_work_to_do = -1; /* no limit */
 566         unsigned int wq_work_done;
 567
 568         wq_work_done = vnic_cq_service(&enic->cq[cq],
 569                 wq_work_to_do, enic_wq_service, NULL);
 570
 571         vnic_intr_return_credits(&enic->intr[intr],
 572                 wq_work_done,
 573                 1 /* unmask intr */,
 574                 1 /* reset intr timer */);
 575
 576         return IRQ_HANDLED;
 577 }
 578
 579 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 580 {
 581         struct enic *enic = data;
 582         unsigned int intr = enic_msix_err_intr(enic);
 583
 584         vnic_intr_return_all_credits(&enic->intr[intr]);
 585
 586         enic_log_q_error(enic);
 587
 588         /* schedule recovery from WQ/RQ error */
 589         schedule_work(&enic->reset);
 590
 591         return IRQ_HANDLED;
 592 }
 593
 594 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 595 {
 596         struct enic *enic = data;
 597         unsigned int intr = enic_msix_notify_intr(enic);
 598
 599         vnic_intr_return_all_credits(&enic->intr[intr]);
 600         enic_notify_check(enic);
 601
 602         return IRQ_HANDLED;
 603 }
 604
 605 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 606         struct vnic_wq *wq, struct sk_buff *skb,
 607         unsigned int len_left, int loopback)
 608 {
 609         const skb_frag_t *frag;
 610
 611         /* Queue additional data fragments */
 612         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 613                 len_left -= skb_frag_size(frag);
 614                 enic_queue_wq_desc_cont(wq, skb,
 615                         skb_frag_dma_map(&enic->pdev->dev,
 616                                          frag, 0, skb_frag_size(frag),
 617                                          DMA_TO_DEVICE),
 618                         skb_frag_size(frag),
 619                         (len_left == 0),        /* EOP? */
 620                         loopback);
 621         }
 622 }
 623
 624 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 625         struct vnic_wq *wq, struct sk_buff *skb,
 626         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 627 {
 628         unsigned int head_len = skb_headlen(skb);
 629         unsigned int len_left = skb->len - head_len;
 630         int eop = (len_left == 0);
 631
 632         /* Queue the main skb fragment. The fragments are no larger
 633          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 634          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 635          * per fragment is queued.
 636          */
 637         enic_queue_wq_desc(wq, skb,
 638                 pci_map_single(enic->pdev, skb->data,
 639                         head_len, PCI_DMA_TODEVICE),
 640                 head_len,
 641                 vlan_tag_insert, vlan_tag,
 642                 eop, loopback);
 643
 644         if (!eop)
 645                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 646 }
 647
 648 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 649         struct vnic_wq *wq, struct sk_buff *skb,
 650         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 651 {
 652         unsigned int head_len = skb_headlen(skb);
 653         unsigned int len_left = skb->len - head_len;
 654         unsigned int hdr_len = skb_checksum_start_offset(skb);
 655         unsigned int csum_offset = hdr_len + skb->csum_offset;
 656         int eop = (len_left == 0);
 657
 658         /* Queue the main skb fragment. The fragments are no larger
 659          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 660          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 661          * per fragment is queued.
 662          */
 663         enic_queue_wq_desc_csum_l4(wq, skb,
 664                 pci_map_single(enic->pdev, skb->data,
 665                         head_len, PCI_DMA_TODEVICE),
 666                 head_len,
 667                 csum_offset,
 668                 hdr_len,
 669                 vlan_tag_insert, vlan_tag,
 670                 eop, loopback);
 671
 672         if (!eop)
 673                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 674 }
 675
 676 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 677         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 678         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 679 {
 680         unsigned int frag_len_left = skb_headlen(skb);
 681         unsigned int len_left = skb->len - frag_len_left;
 682         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 683         int eop = (len_left == 0);
 684         unsigned int len;
 685         dma_addr_t dma_addr;
 686         unsigned int offset = 0;
 687         skb_frag_t *frag;
 688
 689         /* Preload TCP csum field with IP pseudo hdr calculated
 690          * with IP length set to zero.  HW will later add in length
 691          * to each TCP segment resulting from the TSO.
 692          */
 693
 694         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 695                 ip_hdr(skb)->check = 0;
 696                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 697                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 698         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 699                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 700                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 701         }
 702
 703         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 704          * for the main skb fragment
 705          */
 706         while (frag_len_left) {
 707                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 708                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 709                                 len, PCI_DMA_TODEVICE);
 710                 enic_queue_wq_desc_tso(wq, skb,
 711                         dma_addr,
 712                         len,
 713                         mss, hdr_len,
 714                         vlan_tag_insert, vlan_tag,
 715                         eop && (len == frag_len_left), loopback);
 716                 frag_len_left -= len;
 717                 offset += len;
 718         }
 719
 720         if (eop)
 721                 return;
 722
 723         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 724          * for additional data fragments
 725          */
 726         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 727                 len_left -= skb_frag_size(frag);
 728                 frag_len_left = skb_frag_size(frag);
 729                 offset = 0;
 730
 731                 while (frag_len_left) {
 732                         len = min(frag_len_left,
 733                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 734                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 735                                                     offset, len,
 736                                                     DMA_TO_DEVICE);
 737                         enic_queue_wq_desc_cont(wq, skb,
 738                                 dma_addr,
 739                                 len,
 740                                 (len_left == 0) &&
 741                                 (len == frag_len_left),         /* EOP? */
 742                                 loopback);
 743                         frag_len_left -= len;
 744                         offset += len;
 745                 }
 746         }
 747 }
 748
 749 static inline void enic_queue_wq_skb(struct enic *enic,
 750         struct vnic_wq *wq, struct sk_buff *skb)
 751 {
 752         unsigned int mss = skb_shinfo(skb)->gso_size;
 753         unsigned int vlan_tag = 0;
 754         int vlan_tag_insert = 0;
 755         int loopback = 0;
 756
 757         if (vlan_tx_tag_present(skb)) {
 758                 /* VLAN tag from trunking driver */
 759                 vlan_tag_insert = 1;
 760                 vlan_tag = vlan_tx_tag_get(skb);
 761         } else if (enic->loop_enable) {
 762                 vlan_tag = enic->loop_tag;
 763                 loopback = 1;
 764         }
 765
 766         if (mss)
 767                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 768                         vlan_tag_insert, vlan_tag, loopback);
 769         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 770                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 771                         vlan_tag_insert, vlan_tag, loopback);
 772         else
 773                 enic_queue_wq_skb_vlan(enic, wq, skb,
 774                         vlan_tag_insert, vlan_tag, loopback);
 775 }
 776
 777 /* netif_tx_lock held, process context with BHs disabled, or BH */
 778 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 779         struct net_device *netdev)
 780 {
 781         struct enic *enic = netdev_priv(netdev);
 782         struct vnic_wq *wq = &enic->wq[0];
 783         unsigned long flags;
 784
 785         if (skb->len <= 0) {
 786                 dev_kfree_skb(skb);
 787                 return NETDEV_TX_OK;
 788         }
 789
 790         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 791          * which is very likely.  In the off chance it's going to take
 792          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 793          */
 794
 795         if (skb_shinfo(skb)->gso_size == 0 &&
 796             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 797             skb_linearize(skb)) {
 798                 dev_kfree_skb(skb);
 799                 return NETDEV_TX_OK;
 800         }
 801
 802         spin_lock_irqsave(&enic->wq_lock[0], flags);
 803
 804         if (vnic_wq_desc_avail(wq) <
 805             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 806                 netif_stop_queue(netdev);
 807                 /* This is a hard error, log it */
 808                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 809                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 810                 return NETDEV_TX_BUSY;
 811         }
 812
 813         enic_queue_wq_skb(enic, wq, skb);
 814
 815         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 816                 netif_stop_queue(netdev);
 817
 818         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 819
 820         return NETDEV_TX_OK;
 821 }
 822
 823 /* dev_base_lock rwlock held, nominally process context */
 824 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 825                                                 struct rtnl_link_stats64 *net_stats)
 826 {
 827         struct enic *enic = netdev_priv(netdev);
 828         struct vnic_stats *stats;
 829
 830         enic_dev_stats_dump(enic, &stats);
 831
 832         net_stats->tx_packets = stats->tx.tx_frames_ok;
 833         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 834         net_stats->tx_errors = stats->tx.tx_errors;
 835         net_stats->tx_dropped = stats->tx.tx_drops;
 836
 837         net_stats->rx_packets = stats->rx.rx_frames_ok;
 838         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 839         net_stats->rx_errors = stats->rx.rx_errors;
 840         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 841         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 842         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 843         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 844
 845         return net_stats;
 846 }
 847
 848 void enic_reset_addr_lists(struct enic *enic)
 849 {
 850         enic->mc_count = 0;
 851         enic->uc_count = 0;
 852         enic->flags = 0;
 853 }
 854
 855 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 856 {
 857         struct enic *enic = netdev_priv(netdev);
 858
 859         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 860                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 861                         return -EADDRNOTAVAIL;
 862         } else {
 863                 if (!is_valid_ether_addr(addr))
 864                         return -EADDRNOTAVAIL;
 865         }
 866
 867         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 868
 869         return 0;
 870 }
 871
 872 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 873 {
 874         struct enic *enic = netdev_priv(netdev);
 875         struct sockaddr *saddr = p;
 876         char *addr = saddr->sa_data;
 877         int err;
 878
 879         if (netif_running(enic->netdev)) {
 880                 err = enic_dev_del_station_addr(enic);
 881                 if (err)
 882                         return err;
 883         }
 884
 885         err = enic_set_mac_addr(netdev, addr);
 886         if (err)
 887                 return err;
 888
 889         if (netif_running(enic->netdev)) {
 890                 err = enic_dev_add_station_addr(enic);
 891                 if (err)
 892                         return err;
 893         }
 894
 895         return err;
 896 }
 897
 898 static int enic_set_mac_address(struct net_device *netdev, void *p)
 899 {
 900         struct sockaddr *saddr = p;
 901         char *addr = saddr->sa_data;
 902         struct enic *enic = netdev_priv(netdev);
 903         int err;
 904
 905         err = enic_dev_del_station_addr(enic);
 906         if (err)
 907                 return err;
 908
 909         err = enic_set_mac_addr(netdev, addr);
 910         if (err)
 911                 return err;
 912
 913         return enic_dev_add_station_addr(enic);
 914 }
 915
 916 static void enic_update_multicast_addr_list(struct enic *enic)
 917 {
 918         struct net_device *netdev = enic->netdev;
 919         struct netdev_hw_addr *ha;
 920         unsigned int mc_count = netdev_mc_count(netdev);
 921         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 922         unsigned int i, j;
 923
 924         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 925                 netdev_warn(netdev, "Registering only %d out of %d "
 926                         "multicast addresses\n",
 927                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 928                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 929         }
 930
 931         /* Is there an easier way?  Trying to minimize to
 932          * calls to add/del multicast addrs.  We keep the
 933          * addrs from the last call in enic->mc_addr and
 934          * look for changes to add/del.
 935          */
 936
 937         i = 0;
 938         netdev_for_each_mc_addr(ha, netdev) {
 939                 if (i == mc_count)
 940                         break;
 941                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 942         }
 943
 944         for (i = 0; i < enic->mc_count; i++) {
 945                 for (j = 0; j < mc_count; j++)
 946                         if (compare_ether_addr(enic->mc_addr[i],
 947                                 mc_addr[j]) == 0)
 948                                 break;
 949                 if (j == mc_count)
 950                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 951         }
 952
 953         for (i = 0; i < mc_count; i++) {
 954                 for (j = 0; j < enic->mc_count; j++)
 955                         if (compare_ether_addr(mc_addr[i],
 956                                 enic->mc_addr[j]) == 0)
 957                                 break;
 958                 if (j == enic->mc_count)
 959                         enic_dev_add_addr(enic, mc_addr[i]);
 960         }
 961
 962         /* Save the list to compare against next time
 963          */
 964
 965         for (i = 0; i < mc_count; i++)
 966                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 967
 968         enic->mc_count = mc_count;
 969 }
 970
 971 static void enic_update_unicast_addr_list(struct enic *enic)
 972 {
 973         struct net_device *netdev = enic->netdev;
 974         struct netdev_hw_addr *ha;
 975         unsigned int uc_count = netdev_uc_count(netdev);
 976         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 977         unsigned int i, j;
 978
 979         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 980                 netdev_warn(netdev, "Registering only %d out of %d "
 981                         "unicast addresses\n",
 982                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 983                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 984         }
 985
 986         /* Is there an easier way?  Trying to minimize to
 987          * calls to add/del unicast addrs.  We keep the
 988          * addrs from the last call in enic->uc_addr and
 989          * look for changes to add/del.
 990          */
 991
 992         i = 0;
 993         netdev_for_each_uc_addr(ha, netdev) {
 994                 if (i == uc_count)
 995                         break;
 996                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 997         }
 998
 999         for (i = 0; i < enic->uc_count; i++) {
1000                 for (j = 0; j < uc_count; j++)
1001                         if (compare_ether_addr(enic->uc_addr[i],
1002                                 uc_addr[j]) == 0)
1003                                 break;
1004                 if (j == uc_count)
1005                         enic_dev_del_addr(enic, enic->uc_addr[i]);
1006         }
1007
1008         for (i = 0; i < uc_count; i++) {
1009                 for (j = 0; j < enic->uc_count; j++)
1010                         if (compare_ether_addr(uc_addr[i],
1011                                 enic->uc_addr[j]) == 0)
1012                                 break;
1013                 if (j == enic->uc_count)
1014                         enic_dev_add_addr(enic, uc_addr[i]);
1015         }
1016
1017         /* Save the list to compare against next time
1018          */
1019
1020         for (i = 0; i < uc_count; i++)
1021                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1022
1023         enic->uc_count = uc_count;
1024 }
1025
1026 /* netif_tx_lock held, BHs disabled */
1027 static void enic_set_rx_mode(struct net_device *netdev)
1028 {
1029         struct enic *enic = netdev_priv(netdev);
1030         int directed = 1;
1031         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1032         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1033         int promisc = (netdev->flags & IFF_PROMISC) ||
1034                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1035         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1036                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1037         unsigned int flags = netdev->flags |
1038                 (allmulti ? IFF_ALLMULTI : 0) |
1039                 (promisc ? IFF_PROMISC : 0);
1040
1041         if (enic->flags != flags) {
1042                 enic->flags = flags;
1043                 enic_dev_packet_filter(enic, directed,
1044                         multicast, broadcast, promisc, allmulti);
1045         }
1046
1047         if (!promisc) {
1048                 enic_update_unicast_addr_list(enic);
1049                 if (!allmulti)
1050                         enic_update_multicast_addr_list(enic);
1051         }
1052 }
1053
1054 /* netif_tx_lock held, BHs disabled */
1055 static void enic_tx_timeout(struct net_device *netdev)
1056 {
1057         struct enic *enic = netdev_priv(netdev);
1058         schedule_work(&enic->reset);
1059 }
1060
1061 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1062 {
1063         struct enic *enic = netdev_priv(netdev);
1064         struct enic_port_profile *pp;
1065         int err;
1066
1067         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1068         if (err)
1069                 return err;
1070
1071         if (is_valid_ether_addr(mac)) {
1072                 memcpy(pp->vf_mac, mac, ETH_ALEN);
1073                 return 0;
1074         } else
1075                 return -EINVAL;
1076 }
1077
1078 static int enic_set_vf_port(struct net_device *netdev, int vf,
1079         struct nlattr *port[])
1080 {
1081         struct enic *enic = netdev_priv(netdev);
1082         struct enic_port_profile prev_pp;
1083         struct enic_port_profile *pp;
1084         int err = 0, restore_pp = 1;
1085
1086         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1087         if (err)
1088                 return err;
1089
1090         if (!port[IFLA_PORT_REQUEST])
1091                 return -EOPNOTSUPP;
1092
1093         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1094         memset(pp, 0, sizeof(*enic->pp));
1095
1096         pp->set |= ENIC_SET_REQUEST;
1097         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1098
1099         if (port[IFLA_PORT_PROFILE]) {
1100                 pp->set |= ENIC_SET_NAME;
1101                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1102                         PORT_PROFILE_MAX);
1103         }
1104
1105         if (port[IFLA_PORT_INSTANCE_UUID]) {
1106                 pp->set |= ENIC_SET_INSTANCE;
1107                 memcpy(pp->instance_uuid,
1108                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1109         }
1110
1111         if (port[IFLA_PORT_HOST_UUID]) {
1112                 pp->set |= ENIC_SET_HOST;
1113                 memcpy(pp->host_uuid,
1114                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1115         }
1116
1117         /* Special case handling: mac came from IFLA_VF_MAC */
1118         if (!is_zero_ether_addr(prev_pp.vf_mac))
1119                 memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1120
1121         if (vf == PORT_SELF_VF && is_zero_ether_addr(netdev->dev_addr))
1122                 random_ether_addr(netdev->dev_addr);
1123
1124         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1125         if (err) {
1126                 if (restore_pp) {
1127                         /* Things are still the way they were: Implicit
1128                          * DISASSOCIATE failed
1129                          */
1130                         memcpy(pp, &prev_pp, sizeof(*pp));
1131                 } else {
1132                         memset(pp, 0, sizeof(*pp));
1133                         if (vf == PORT_SELF_VF)
1134                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1135                 }
1136         } else {
1137                 /* Set flag to indicate that the port assoc/disassoc
1138                  * request has been sent out to fw
1139                  */
1140                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1141
1142                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1143                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1144                         memset(pp->mac_addr, 0, ETH_ALEN);
1145                         if (vf == PORT_SELF_VF)
1146                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1147                 }
1148         }
1149
1150         memset(pp->vf_mac, 0, ETH_ALEN);
1151
1152         return err;
1153 }
1154
1155 static int enic_get_vf_port(struct net_device *netdev, int vf,
1156         struct sk_buff *skb)
1157 {
1158         struct enic *enic = netdev_priv(netdev);
1159         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1160         struct enic_port_profile *pp;
1161         int err;
1162
1163         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1164         if (err)
1165                 return err;
1166
1167         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1168                 return -ENODATA;
1169
1170         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1171         if (err)
1172                 return err;
1173
1174         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, pp->request);
1175         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1176         if (pp->set & ENIC_SET_NAME)
1177                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1178                         pp->name);
1179         if (pp->set & ENIC_SET_INSTANCE)
1180                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1181                         pp->instance_uuid);
1182         if (pp->set & ENIC_SET_HOST)
1183                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1184                         pp->host_uuid);
1185
1186         return 0;
1187
1188 nla_put_failure:
1189         return -EMSGSIZE;
1190 }
1191
1192 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1193 {
1194         struct enic *enic = vnic_dev_priv(rq->vdev);
1195
1196         if (!buf->os_buf)
1197                 return;
1198
1199         pci_unmap_single(enic->pdev, buf->dma_addr,
1200                 buf->len, PCI_DMA_FROMDEVICE);
1201         dev_kfree_skb_any(buf->os_buf);
1202 }
1203
1204 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1205 {
1206         struct enic *enic = vnic_dev_priv(rq->vdev);
1207         struct net_device *netdev = enic->netdev;
1208         struct sk_buff *skb;
1209         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1210         unsigned int os_buf_index = 0;
1211         dma_addr_t dma_addr;
1212
1213         skb = netdev_alloc_skb_ip_align(netdev, len);
1214         if (!skb)
1215                 return -ENOMEM;
1216
1217         dma_addr = pci_map_single(enic->pdev, skb->data,
1218                 len, PCI_DMA_FROMDEVICE);
1219
1220         enic_queue_rq_desc(rq, skb, os_buf_index,
1221                 dma_addr, len);
1222
1223         return 0;
1224 }
1225
1226 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1227         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1228         int skipped, void *opaque)
1229 {
1230         struct enic *enic = vnic_dev_priv(rq->vdev);
1231         struct net_device *netdev = enic->netdev;
1232         struct sk_buff *skb;
1233
1234         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1235         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1236         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1237         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1238         u8 packet_error;
1239         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1240         u32 rss_hash;
1241
1242         if (skipped)
1243                 return;
1244
1245         skb = buf->os_buf;
1246         prefetch(skb->data - NET_IP_ALIGN);
1247         pci_unmap_single(enic->pdev, buf->dma_addr,
1248                 buf->len, PCI_DMA_FROMDEVICE);
1249
1250         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1251                 &type, &color, &q_number, &completed_index,
1252                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1253                 &csum_not_calc, &rss_hash, &bytes_written,
1254                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1255                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1256                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1257                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1258                 &fcs_ok);
1259
1260         if (packet_error) {
1261
1262                 if (!fcs_ok) {
1263                         if (bytes_written > 0)
1264                                 enic->rq_bad_fcs++;
1265                         else if (bytes_written == 0)
1266                                 enic->rq_truncated_pkts++;
1267                 }
1268
1269                 dev_kfree_skb_any(skb);
1270
1271                 return;
1272         }
1273
1274         if (eop && bytes_written > 0) {
1275
1276                 /* Good receive
1277                  */
1278
1279                 skb_put(skb, bytes_written);
1280                 skb->protocol = eth_type_trans(skb, netdev);
1281
1282                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1283                         skb->csum = htons(checksum);
1284                         skb->ip_summed = CHECKSUM_COMPLETE;
1285                 }
1286
1287                 skb->dev = netdev;
1288
1289                 if (vlan_stripped)
1290                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1291
1292                 if (netdev->features & NETIF_F_GRO)
1293                         napi_gro_receive(&enic->napi[q_number], skb);
1294                 else
1295                         netif_receive_skb(skb);
1296         } else {
1297
1298                 /* Buffer overflow
1299                  */
1300
1301                 dev_kfree_skb_any(skb);
1302         }
1303 }
1304
1305 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1306         u8 type, u16 q_number, u16 completed_index, void *opaque)
1307 {
1308         struct enic *enic = vnic_dev_priv(vdev);
1309
1310         vnic_rq_service(&enic->rq[q_number], cq_desc,
1311                 completed_index, VNIC_RQ_RETURN_DESC,
1312                 enic_rq_indicate_buf, opaque);
1313
1314         return 0;
1315 }
1316
1317 static int enic_poll(struct napi_struct *napi, int budget)
1318 {
1319         struct net_device *netdev = napi->dev;
1320         struct enic *enic = netdev_priv(netdev);
1321         unsigned int cq_rq = enic_cq_rq(enic, 0);
1322         unsigned int cq_wq = enic_cq_wq(enic, 0);
1323         unsigned int intr = enic_legacy_io_intr();
1324         unsigned int rq_work_to_do = budget;
1325         unsigned int wq_work_to_do = -1; /* no limit */
1326         unsigned int  work_done, rq_work_done, wq_work_done;
1327         int err;
1328
1329         /* Service RQ (first) and WQ
1330          */
1331
1332         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1333                 rq_work_to_do, enic_rq_service, NULL);
1334
1335         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1336                 wq_work_to_do, enic_wq_service, NULL);
1337
1338         /* Accumulate intr event credits for this polling
1339          * cycle.  An intr event is the completion of a
1340          * a WQ or RQ packet.
1341          */
1342
1343         work_done = rq_work_done + wq_work_done;
1344
1345         if (work_done > 0)
1346                 vnic_intr_return_credits(&enic->intr[intr],
1347                         work_done,
1348                         0 /* don't unmask intr */,
1349                         0 /* don't reset intr timer */);
1350
1351         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1352
1353         /* Buffer allocation failed. Stay in polling
1354          * mode so we can try to fill the ring again.
1355          */
1356
1357         if (err)
1358                 rq_work_done = rq_work_to_do;
1359
1360         if (rq_work_done < rq_work_to_do) {
1361
1362                 /* Some work done, but not enough to stay in polling,
1363                  * exit polling
1364                  */
1365
1366                 napi_complete(napi);
1367                 vnic_intr_unmask(&enic->intr[intr]);
1368         }
1369
1370         return rq_work_done;
1371 }
1372
1373 static int enic_poll_msix(struct napi_struct *napi, int budget)
1374 {
1375         struct net_device *netdev = napi->dev;
1376         struct enic *enic = netdev_priv(netdev);
1377         unsigned int rq = (napi - &enic->napi[0]);
1378         unsigned int cq = enic_cq_rq(enic, rq);
1379         unsigned int intr = enic_msix_rq_intr(enic, rq);
1380         unsigned int work_to_do = budget;
1381         unsigned int work_done;
1382         int err;
1383
1384         /* Service RQ
1385          */
1386
1387         work_done = vnic_cq_service(&enic->cq[cq],
1388                 work_to_do, enic_rq_service, NULL);
1389
1390         /* Return intr event credits for this polling
1391          * cycle.  An intr event is the completion of a
1392          * RQ packet.
1393          */
1394
1395         if (work_done > 0)
1396                 vnic_intr_return_credits(&enic->intr[intr],
1397                         work_done,
1398                         0 /* don't unmask intr */,
1399                         0 /* don't reset intr timer */);
1400
1401         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1402
1403         /* Buffer allocation failed. Stay in polling mode
1404          * so we can try to fill the ring again.
1405          */
1406
1407         if (err)
1408                 work_done = work_to_do;
1409
1410         if (work_done < work_to_do) {
1411
1412                 /* Some work done, but not enough to stay in polling,
1413                  * exit polling
1414                  */
1415
1416                 napi_complete(napi);
1417                 vnic_intr_unmask(&enic->intr[intr]);
1418         }
1419
1420         return work_done;
1421 }
1422
1423 static void enic_notify_timer(unsigned long data)
1424 {
1425         struct enic *enic = (struct enic *)data;
1426
1427         enic_notify_check(enic);
1428
1429         mod_timer(&enic->notify_timer,
1430                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1431 }
1432
1433 static void enic_free_intr(struct enic *enic)
1434 {
1435         struct net_device *netdev = enic->netdev;
1436         unsigned int i;
1437
1438         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1439         case VNIC_DEV_INTR_MODE_INTX:
1440                 free_irq(enic->pdev->irq, netdev);
1441                 break;
1442         case VNIC_DEV_INTR_MODE_MSI:
1443                 free_irq(enic->pdev->irq, enic);
1444                 break;
1445         case VNIC_DEV_INTR_MODE_MSIX:
1446                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1447                         if (enic->msix[i].requested)
1448                                 free_irq(enic->msix_entry[i].vector,
1449                                         enic->msix[i].devid);
1450                 break;
1451         default:
1452                 break;
1453         }
1454 }
1455
1456 static int enic_request_intr(struct enic *enic)
1457 {
1458         struct net_device *netdev = enic->netdev;
1459         unsigned int i, intr;
1460         int err = 0;
1461
1462         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1463
1464         case VNIC_DEV_INTR_MODE_INTX:
1465
1466                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1467                         IRQF_SHARED, netdev->name, netdev);
1468                 break;
1469
1470         case VNIC_DEV_INTR_MODE_MSI:
1471
1472                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1473                         0, netdev->name, enic);
1474                 break;
1475
1476         case VNIC_DEV_INTR_MODE_MSIX:
1477
1478                 for (i = 0; i < enic->rq_count; i++) {
1479                         intr = enic_msix_rq_intr(enic, i);
1480                         sprintf(enic->msix[intr].devname,
1481                                 "%.11s-rx-%d", netdev->name, i);
1482                         enic->msix[intr].isr = enic_isr_msix_rq;
1483                         enic->msix[intr].devid = &enic->napi[i];
1484                 }
1485
1486                 for (i = 0; i < enic->wq_count; i++) {
1487                         intr = enic_msix_wq_intr(enic, i);
1488                         sprintf(enic->msix[intr].devname,
1489                                 "%.11s-tx-%d", netdev->name, i);
1490                         enic->msix[intr].isr = enic_isr_msix_wq;
1491                         enic->msix[intr].devid = enic;
1492                 }
1493
1494                 intr = enic_msix_err_intr(enic);
1495                 sprintf(enic->msix[intr].devname,
1496                         "%.11s-err", netdev->name);
1497                 enic->msix[intr].isr = enic_isr_msix_err;
1498                 enic->msix[intr].devid = enic;
1499
1500                 intr = enic_msix_notify_intr(enic);
1501                 sprintf(enic->msix[intr].devname,
1502                         "%.11s-notify", netdev->name);
1503                 enic->msix[intr].isr = enic_isr_msix_notify;
1504                 enic->msix[intr].devid = enic;
1505
1506                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1507                         enic->msix[i].requested = 0;
1508
1509                 for (i = 0; i < enic->intr_count; i++) {
1510                         err = request_irq(enic->msix_entry[i].vector,
1511                                 enic->msix[i].isr, 0,
1512                                 enic->msix[i].devname,
1513                                 enic->msix[i].devid);
1514                         if (err) {
1515                                 enic_free_intr(enic);
1516                                 break;
1517                         }
1518                         enic->msix[i].requested = 1;
1519                 }
1520
1521                 break;
1522
1523         default:
1524                 break;
1525         }
1526
1527         return err;
1528 }
1529
1530 static void enic_synchronize_irqs(struct enic *enic)
1531 {
1532         unsigned int i;
1533
1534         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1535         case VNIC_DEV_INTR_MODE_INTX:
1536         case VNIC_DEV_INTR_MODE_MSI:
1537                 synchronize_irq(enic->pdev->irq);
1538                 break;
1539         case VNIC_DEV_INTR_MODE_MSIX:
1540                 for (i = 0; i < enic->intr_count; i++)
1541                         synchronize_irq(enic->msix_entry[i].vector);
1542                 break;
1543         default:
1544                 break;
1545         }
1546 }
1547
1548 static int enic_dev_notify_set(struct enic *enic)
1549 {
1550         int err;
1551
1552         spin_lock(&enic->devcmd_lock);
1553         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1554         case VNIC_DEV_INTR_MODE_INTX:
1555                 err = vnic_dev_notify_set(enic->vdev,
1556                         enic_legacy_notify_intr());
1557                 break;
1558         case VNIC_DEV_INTR_MODE_MSIX:
1559                 err = vnic_dev_notify_set(enic->vdev,
1560                         enic_msix_notify_intr(enic));
1561                 break;
1562         default:
1563                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1564                 break;
1565         }
1566         spin_unlock(&enic->devcmd_lock);
1567
1568         return err;
1569 }
1570
1571 static void enic_notify_timer_start(struct enic *enic)
1572 {
1573         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1574         case VNIC_DEV_INTR_MODE_MSI:
1575                 mod_timer(&enic->notify_timer, jiffies);
1576                 break;
1577         default:
1578                 /* Using intr for notification for INTx/MSI-X */
1579                 break;
1580         }
1581 }
1582
1583 /* rtnl lock is held, process context */
1584 static int enic_open(struct net_device *netdev)
1585 {
1586         struct enic *enic = netdev_priv(netdev);
1587         unsigned int i;
1588         int err;
1589
1590         err = enic_request_intr(enic);
1591         if (err) {
1592                 netdev_err(netdev, "Unable to request irq.\n");
1593                 return err;
1594         }
1595
1596         err = enic_dev_notify_set(enic);
1597         if (err) {
1598                 netdev_err(netdev,
1599                         "Failed to alloc notify buffer, aborting.\n");
1600                 goto err_out_free_intr;
1601         }
1602
1603         for (i = 0; i < enic->rq_count; i++) {
1604                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1605                 /* Need at least one buffer on ring to get going */
1606                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1607                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1608                         err = -ENOMEM;
1609                         goto err_out_notify_unset;
1610                 }
1611         }
1612
1613         for (i = 0; i < enic->wq_count; i++)
1614                 vnic_wq_enable(&enic->wq[i]);
1615         for (i = 0; i < enic->rq_count; i++)
1616                 vnic_rq_enable(&enic->rq[i]);
1617
1618         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1619                 enic_dev_add_station_addr(enic);
1620
1621         enic_set_rx_mode(netdev);
1622
1623         netif_wake_queue(netdev);
1624
1625         for (i = 0; i < enic->rq_count; i++)
1626                 napi_enable(&enic->napi[i]);
1627
1628         enic_dev_enable(enic);
1629
1630         for (i = 0; i < enic->intr_count; i++)
1631                 vnic_intr_unmask(&enic->intr[i]);
1632
1633         enic_notify_timer_start(enic);
1634
1635         return 0;
1636
1637 err_out_notify_unset:
1638         enic_dev_notify_unset(enic);
1639 err_out_free_intr:
1640         enic_free_intr(enic);
1641
1642         return err;
1643 }
1644
1645 /* rtnl lock is held, process context */
1646 static int enic_stop(struct net_device *netdev)
1647 {
1648         struct enic *enic = netdev_priv(netdev);
1649         unsigned int i;
1650         int err;
1651
1652         for (i = 0; i < enic->intr_count; i++) {
1653                 vnic_intr_mask(&enic->intr[i]);
1654                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1655         }
1656
1657         enic_synchronize_irqs(enic);
1658
1659         del_timer_sync(&enic->notify_timer);
1660
1661         enic_dev_disable(enic);
1662
1663         for (i = 0; i < enic->rq_count; i++)
1664                 napi_disable(&enic->napi[i]);
1665
1666         netif_carrier_off(netdev);
1667         netif_tx_disable(netdev);
1668
1669         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1670                 enic_dev_del_station_addr(enic);
1671
1672         for (i = 0; i < enic->wq_count; i++) {
1673                 err = vnic_wq_disable(&enic->wq[i]);
1674                 if (err)
1675                         return err;
1676         }
1677         for (i = 0; i < enic->rq_count; i++) {
1678                 err = vnic_rq_disable(&enic->rq[i]);
1679                 if (err)
1680                         return err;
1681         }
1682
1683         enic_dev_notify_unset(enic);
1684         enic_free_intr(enic);
1685
1686         for (i = 0; i < enic->wq_count; i++)
1687                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1688         for (i = 0; i < enic->rq_count; i++)
1689                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1690         for (i = 0; i < enic->cq_count; i++)
1691                 vnic_cq_clean(&enic->cq[i]);
1692         for (i = 0; i < enic->intr_count; i++)
1693                 vnic_intr_clean(&enic->intr[i]);
1694
1695         return 0;
1696 }
1697
1698 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1699 {
1700         struct enic *enic = netdev_priv(netdev);
1701         int running = netif_running(netdev);
1702
1703         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1704                 return -EINVAL;
1705
1706         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1707                 return -EOPNOTSUPP;
1708
1709         if (running)
1710                 enic_stop(netdev);
1711
1712         netdev->mtu = new_mtu;
1713
1714         if (netdev->mtu > enic->port_mtu)
1715                 netdev_warn(netdev,
1716                         "interface MTU (%d) set higher than port MTU (%d)\n",
1717                         netdev->mtu, enic->port_mtu);
1718
1719         if (running)
1720                 enic_open(netdev);
1721
1722         return 0;
1723 }
1724
1725 static void enic_change_mtu_work(struct work_struct *work)
1726 {
1727         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1728         struct net_device *netdev = enic->netdev;
1729         int new_mtu = vnic_dev_mtu(enic->vdev);
1730         int err;
1731         unsigned int i;
1732
1733         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1734
1735         rtnl_lock();
1736
1737         /* Stop RQ */
1738         del_timer_sync(&enic->notify_timer);
1739
1740         for (i = 0; i < enic->rq_count; i++)
1741                 napi_disable(&enic->napi[i]);
1742
1743         vnic_intr_mask(&enic->intr[0]);
1744         enic_synchronize_irqs(enic);
1745         err = vnic_rq_disable(&enic->rq[0]);
1746         if (err) {
1747                 netdev_err(netdev, "Unable to disable RQ.\n");
1748                 return;
1749         }
1750         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1751         vnic_cq_clean(&enic->cq[0]);
1752         vnic_intr_clean(&enic->intr[0]);
1753
1754         /* Fill RQ with new_mtu-sized buffers */
1755         netdev->mtu = new_mtu;
1756         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1757         /* Need at least one buffer on ring to get going */
1758         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1759                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1760                 return;
1761         }
1762
1763         /* Start RQ */
1764         vnic_rq_enable(&enic->rq[0]);
1765         napi_enable(&enic->napi[0]);
1766         vnic_intr_unmask(&enic->intr[0]);
1767         enic_notify_timer_start(enic);
1768
1769         rtnl_unlock();
1770
1771         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1772 }
1773
1774 #ifdef CONFIG_NET_POLL_CONTROLLER
1775 static void enic_poll_controller(struct net_device *netdev)
1776 {
1777         struct enic *enic = netdev_priv(netdev);
1778         struct vnic_dev *vdev = enic->vdev;
1779         unsigned int i, intr;
1780
1781         switch (vnic_dev_get_intr_mode(vdev)) {
1782         case VNIC_DEV_INTR_MODE_MSIX:
1783                 for (i = 0; i < enic->rq_count; i++) {
1784                         intr = enic_msix_rq_intr(enic, i);
1785                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1786                                 &enic->napi[i]);
1787                 }
1788
1789                 for (i = 0; i < enic->wq_count; i++) {
1790                         intr = enic_msix_wq_intr(enic, i);
1791                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1792                 }
1793
1794                 break;
1795         case VNIC_DEV_INTR_MODE_MSI:
1796                 enic_isr_msi(enic->pdev->irq, enic);
1797                 break;
1798         case VNIC_DEV_INTR_MODE_INTX:
1799                 enic_isr_legacy(enic->pdev->irq, netdev);
1800                 break;
1801         default:
1802                 break;
1803         }
1804 }
1805 #endif
1806
1807 static int enic_dev_wait(struct vnic_dev *vdev,
1808         int (*start)(struct vnic_dev *, int),
1809         int (*finished)(struct vnic_dev *, int *),
1810         int arg)
1811 {
1812         unsigned long time;
1813         int done;
1814         int err;
1815
1816         BUG_ON(in_interrupt());
1817
1818         err = start(vdev, arg);
1819         if (err)
1820                 return err;
1821
1822         /* Wait for func to complete...2 seconds max
1823          */
1824
1825         time = jiffies + (HZ * 2);
1826         do {
1827
1828                 err = finished(vdev, &done);
1829                 if (err)
1830                         return err;
1831
1832                 if (done)
1833                         return 0;
1834
1835                 schedule_timeout_uninterruptible(HZ / 10);
1836
1837         } while (time_after(time, jiffies));
1838
1839         return -ETIMEDOUT;
1840 }
1841
1842 static int enic_dev_open(struct enic *enic)
1843 {
1844         int err;
1845
1846         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1847                 vnic_dev_open_done, 0);
1848         if (err)
1849                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1850                         err);
1851
1852         return err;
1853 }
1854
1855 static int enic_dev_hang_reset(struct enic *enic)
1856 {
1857         int err;
1858
1859         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1860                 vnic_dev_hang_reset_done, 0);
1861         if (err)
1862                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1863                         err);
1864
1865         return err;
1866 }
1867
1868 static int enic_set_rsskey(struct enic *enic)
1869 {
1870         dma_addr_t rss_key_buf_pa;
1871         union vnic_rss_key *rss_key_buf_va = NULL;
1872         union vnic_rss_key rss_key = {
1873                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1874                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1875                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1876                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1877         };
1878         int err;
1879
1880         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1881                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1882         if (!rss_key_buf_va)
1883                 return -ENOMEM;
1884
1885         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1886
1887         spin_lock(&enic->devcmd_lock);
1888         err = enic_set_rss_key(enic,
1889                 rss_key_buf_pa,
1890                 sizeof(union vnic_rss_key));
1891         spin_unlock(&enic->devcmd_lock);
1892
1893         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1894                 rss_key_buf_va, rss_key_buf_pa);
1895
1896         return err;
1897 }
1898
1899 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1900 {
1901         dma_addr_t rss_cpu_buf_pa;
1902         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1903         unsigned int i;
1904         int err;
1905
1906         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1907                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1908         if (!rss_cpu_buf_va)
1909                 return -ENOMEM;
1910
1911         for (i = 0; i < (1 << rss_hash_bits); i++)
1912                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1913
1914         spin_lock(&enic->devcmd_lock);
1915         err = enic_set_rss_cpu(enic,
1916                 rss_cpu_buf_pa,
1917                 sizeof(union vnic_rss_cpu));
1918         spin_unlock(&enic->devcmd_lock);
1919
1920         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1921                 rss_cpu_buf_va, rss_cpu_buf_pa);
1922
1923         return err;
1924 }
1925
1926 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1927         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1928 {
1929         const u8 tso_ipid_split_en = 0;
1930         const u8 ig_vlan_strip_en = 1;
1931         int err;
1932
1933         /* Enable VLAN tag stripping.
1934         */
1935
1936         spin_lock(&enic->devcmd_lock);
1937         err = enic_set_nic_cfg(enic,
1938                 rss_default_cpu, rss_hash_type,
1939                 rss_hash_bits, rss_base_cpu,
1940                 rss_enable, tso_ipid_split_en,
1941                 ig_vlan_strip_en);
1942         spin_unlock(&enic->devcmd_lock);
1943
1944         return err;
1945 }
1946
1947 static int enic_set_rss_nic_cfg(struct enic *enic)
1948 {
1949         struct device *dev = enic_get_dev(enic);
1950         const u8 rss_default_cpu = 0;
1951         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1952                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1953                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1954                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1955         const u8 rss_hash_bits = 7;
1956         const u8 rss_base_cpu = 0;
1957         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1958
1959         if (rss_enable) {
1960                 if (!enic_set_rsskey(enic)) {
1961                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1962                                 rss_enable = 0;
1963                                 dev_warn(dev, "RSS disabled, "
1964                                         "Failed to set RSS cpu indirection table.");
1965                         }
1966                 } else {
1967                         rss_enable = 0;
1968                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1969                 }
1970         }
1971
1972         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1973                 rss_hash_bits, rss_base_cpu, rss_enable);
1974 }
1975
1976 static void enic_reset(struct work_struct *work)
1977 {
1978         struct enic *enic = container_of(work, struct enic, reset);
1979
1980         if (!netif_running(enic->netdev))
1981                 return;
1982
1983         rtnl_lock();
1984
1985         enic_dev_hang_notify(enic);
1986         enic_stop(enic->netdev);
1987         enic_dev_hang_reset(enic);
1988         enic_reset_addr_lists(enic);
1989         enic_init_vnic_resources(enic);
1990         enic_set_rss_nic_cfg(enic);
1991         enic_dev_set_ig_vlan_rewrite_mode(enic);
1992         enic_open(enic->netdev);
1993
1994         rtnl_unlock();
1995 }
1996
1997 static int enic_set_intr_mode(struct enic *enic)
1998 {
1999         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2000         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2001         unsigned int i;
2002
2003         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2004          * on system capabilities.
2005          *
2006          * Try MSI-X first
2007          *
2008          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2009          * (the second to last INTR is used for WQ/RQ errors)
2010          * (the last INTR is used for notifications)
2011          */
2012
2013         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2014         for (i = 0; i < n + m + 2; i++)
2015                 enic->msix_entry[i].entry = i;
2016
2017         /* Use multiple RQs if RSS is enabled
2018          */
2019
2020         if (ENIC_SETTING(enic, RSS) &&
2021             enic->config.intr_mode < 1 &&
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                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2028
2029                         enic->rq_count = n;
2030                         enic->wq_count = m;
2031                         enic->cq_count = n + m;
2032                         enic->intr_count = n + m + 2;
2033
2034                         vnic_dev_set_intr_mode(enic->vdev,
2035                                 VNIC_DEV_INTR_MODE_MSIX);
2036
2037                         return 0;
2038                 }
2039         }
2040
2041         if (enic->config.intr_mode < 1 &&
2042             enic->rq_count >= 1 &&
2043             enic->wq_count >= m &&
2044             enic->cq_count >= 1 + m &&
2045             enic->intr_count >= 1 + m + 2) {
2046                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2047
2048                         enic->rq_count = 1;
2049                         enic->wq_count = m;
2050                         enic->cq_count = 1 + m;
2051                         enic->intr_count = 1 + m + 2;
2052
2053                         vnic_dev_set_intr_mode(enic->vdev,
2054                                 VNIC_DEV_INTR_MODE_MSIX);
2055
2056                         return 0;
2057                 }
2058         }
2059
2060         /* Next try MSI
2061          *
2062          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2063          */
2064
2065         if (enic->config.intr_mode < 2 &&
2066             enic->rq_count >= 1 &&
2067             enic->wq_count >= 1 &&
2068             enic->cq_count >= 2 &&
2069             enic->intr_count >= 1 &&
2070             !pci_enable_msi(enic->pdev)) {
2071
2072                 enic->rq_count = 1;
2073                 enic->wq_count = 1;
2074                 enic->cq_count = 2;
2075                 enic->intr_count = 1;
2076
2077                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2078
2079                 return 0;
2080         }
2081
2082         /* Next try INTx
2083          *
2084          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2085          * (the first INTR is used for WQ/RQ)
2086          * (the second INTR is used for WQ/RQ errors)
2087          * (the last INTR is used for notifications)
2088          */
2089
2090         if (enic->config.intr_mode < 3 &&
2091             enic->rq_count >= 1 &&
2092             enic->wq_count >= 1 &&
2093             enic->cq_count >= 2 &&
2094             enic->intr_count >= 3) {
2095
2096                 enic->rq_count = 1;
2097                 enic->wq_count = 1;
2098                 enic->cq_count = 2;
2099                 enic->intr_count = 3;
2100
2101                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2102
2103                 return 0;
2104         }
2105
2106         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2107
2108         return -EINVAL;
2109 }
2110
2111 static void enic_clear_intr_mode(struct enic *enic)
2112 {
2113         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2114         case VNIC_DEV_INTR_MODE_MSIX:
2115                 pci_disable_msix(enic->pdev);
2116                 break;
2117         case VNIC_DEV_INTR_MODE_MSI:
2118                 pci_disable_msi(enic->pdev);
2119                 break;
2120         default:
2121                 break;
2122         }
2123
2124         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2125 }
2126
2127 static const struct net_device_ops enic_netdev_dynamic_ops = {
2128         .ndo_open               = enic_open,
2129         .ndo_stop               = enic_stop,
2130         .ndo_start_xmit         = enic_hard_start_xmit,
2131         .ndo_get_stats64        = enic_get_stats,
2132         .ndo_validate_addr      = eth_validate_addr,
2133         .ndo_set_rx_mode        = enic_set_rx_mode,
2134         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2135         .ndo_change_mtu         = enic_change_mtu,
2136         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2137         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2138         .ndo_tx_timeout         = enic_tx_timeout,
2139         .ndo_set_vf_port        = enic_set_vf_port,
2140         .ndo_get_vf_port        = enic_get_vf_port,
2141         .ndo_set_vf_mac         = enic_set_vf_mac,
2142 #ifdef CONFIG_NET_POLL_CONTROLLER
2143         .ndo_poll_controller    = enic_poll_controller,
2144 #endif
2145 };
2146
2147 static const struct net_device_ops enic_netdev_ops = {
2148         .ndo_open               = enic_open,
2149         .ndo_stop               = enic_stop,
2150         .ndo_start_xmit         = enic_hard_start_xmit,
2151         .ndo_get_stats64        = enic_get_stats,
2152         .ndo_validate_addr      = eth_validate_addr,
2153         .ndo_set_mac_address    = enic_set_mac_address,
2154         .ndo_set_rx_mode        = enic_set_rx_mode,
2155         .ndo_change_mtu         = enic_change_mtu,
2156         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2157         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2158         .ndo_tx_timeout         = enic_tx_timeout,
2159         .ndo_set_vf_port        = enic_set_vf_port,
2160         .ndo_get_vf_port        = enic_get_vf_port,
2161         .ndo_set_vf_mac         = enic_set_vf_mac,
2162 #ifdef CONFIG_NET_POLL_CONTROLLER
2163         .ndo_poll_controller    = enic_poll_controller,
2164 #endif
2165 };
2166
2167 static void enic_dev_deinit(struct enic *enic)
2168 {
2169         unsigned int i;
2170
2171         for (i = 0; i < enic->rq_count; i++)
2172                 netif_napi_del(&enic->napi[i]);
2173
2174         enic_free_vnic_resources(enic);
2175         enic_clear_intr_mode(enic);
2176 }
2177
2178 static int enic_dev_init(struct enic *enic)
2179 {
2180         struct device *dev = enic_get_dev(enic);
2181         struct net_device *netdev = enic->netdev;
2182         unsigned int i;
2183         int err;
2184
2185         /* Get interrupt coalesce timer info */
2186         err = enic_dev_intr_coal_timer_info(enic);
2187         if (err) {
2188                 dev_warn(dev, "Using default conversion factor for "
2189                         "interrupt coalesce timer\n");
2190                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2191         }
2192
2193         /* Get vNIC configuration
2194          */
2195
2196         err = enic_get_vnic_config(enic);
2197         if (err) {
2198                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2199                 return err;
2200         }
2201
2202         /* Get available resource counts
2203          */
2204
2205         enic_get_res_counts(enic);
2206
2207         /* Set interrupt mode based on resource counts and system
2208          * capabilities
2209          */
2210
2211         err = enic_set_intr_mode(enic);
2212         if (err) {
2213                 dev_err(dev, "Failed to set intr mode based on resource "
2214                         "counts and system capabilities, aborting\n");
2215                 return err;
2216         }
2217
2218         /* Allocate and configure vNIC resources
2219          */
2220
2221         err = enic_alloc_vnic_resources(enic);
2222         if (err) {
2223                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2224                 goto err_out_free_vnic_resources;
2225         }
2226
2227         enic_init_vnic_resources(enic);
2228
2229         err = enic_set_rss_nic_cfg(enic);
2230         if (err) {
2231                 dev_err(dev, "Failed to config nic, aborting\n");
2232                 goto err_out_free_vnic_resources;
2233         }
2234
2235         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2236         default:
2237                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2238                 break;
2239         case VNIC_DEV_INTR_MODE_MSIX:
2240                 for (i = 0; i < enic->rq_count; i++)
2241                         netif_napi_add(netdev, &enic->napi[i],
2242                                 enic_poll_msix, 64);
2243                 break;
2244         }
2245
2246         return 0;
2247
2248 err_out_free_vnic_resources:
2249         enic_clear_intr_mode(enic);
2250         enic_free_vnic_resources(enic);
2251
2252         return err;
2253 }
2254
2255 static void enic_iounmap(struct enic *enic)
2256 {
2257         unsigned int i;
2258
2259         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2260                 if (enic->bar[i].vaddr)
2261                         iounmap(enic->bar[i].vaddr);
2262 }
2263
2264 static int __devinit enic_probe(struct pci_dev *pdev,
2265         const struct pci_device_id *ent)
2266 {
2267         struct device *dev = &pdev->dev;
2268         struct net_device *netdev;
2269         struct enic *enic;
2270         int using_dac = 0;
2271         unsigned int i;
2272         int err;
2273 #ifdef CONFIG_PCI_IOV
2274         int pos = 0;
2275 #endif
2276         int num_pps = 1;
2277
2278         /* Allocate net device structure and initialize.  Private
2279          * instance data is initialized to zero.
2280          */
2281
2282         netdev = alloc_etherdev(sizeof(struct enic));
2283         if (!netdev) {
2284                 pr_err("Etherdev alloc failed, aborting\n");
2285                 return -ENOMEM;
2286         }
2287
2288         pci_set_drvdata(pdev, netdev);
2289
2290         SET_NETDEV_DEV(netdev, &pdev->dev);
2291
2292         enic = netdev_priv(netdev);
2293         enic->netdev = netdev;
2294         enic->pdev = pdev;
2295
2296         /* Setup PCI resources
2297          */
2298
2299         err = pci_enable_device_mem(pdev);
2300         if (err) {
2301                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2302                 goto err_out_free_netdev;
2303         }
2304
2305         err = pci_request_regions(pdev, DRV_NAME);
2306         if (err) {
2307                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2308                 goto err_out_disable_device;
2309         }
2310
2311         pci_set_master(pdev);
2312
2313         /* Query PCI controller on system for DMA addressing
2314          * limitation for the device.  Try 40-bit first, and
2315          * fail to 32-bit.
2316          */
2317
2318         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2319         if (err) {
2320                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2321                 if (err) {
2322                         dev_err(dev, "No usable DMA configuration, aborting\n");
2323                         goto err_out_release_regions;
2324                 }
2325                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2326                 if (err) {
2327                         dev_err(dev, "Unable to obtain %u-bit DMA "
2328                                 "for consistent allocations, aborting\n", 32);
2329                         goto err_out_release_regions;
2330                 }
2331         } else {
2332                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2333                 if (err) {
2334                         dev_err(dev, "Unable to obtain %u-bit DMA "
2335                                 "for consistent allocations, aborting\n", 40);
2336                         goto err_out_release_regions;
2337                 }
2338                 using_dac = 1;
2339         }
2340
2341         /* Map vNIC resources from BAR0-5
2342          */
2343
2344         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2345                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2346                         continue;
2347                 enic->bar[i].len = pci_resource_len(pdev, i);
2348                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2349                 if (!enic->bar[i].vaddr) {
2350                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2351                         err = -ENODEV;
2352                         goto err_out_iounmap;
2353                 }
2354                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2355         }
2356
2357         /* Register vNIC device
2358          */
2359
2360         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2361                 ARRAY_SIZE(enic->bar));
2362         if (!enic->vdev) {
2363                 dev_err(dev, "vNIC registration failed, aborting\n");
2364                 err = -ENODEV;
2365                 goto err_out_iounmap;
2366         }
2367
2368 #ifdef CONFIG_PCI_IOV
2369         /* Get number of subvnics */
2370         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2371         if (pos) {
2372                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2373                         (u16 *)&enic->num_vfs);
2374                 if (enic->num_vfs) {
2375                         err = pci_enable_sriov(pdev, enic->num_vfs);
2376                         if (err) {
2377                                 dev_err(dev, "SRIOV enable failed, aborting."
2378                                         " pci_enable_sriov() returned %d\n",
2379                                         err);
2380                                 goto err_out_vnic_unregister;
2381                         }
2382                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2383                         num_pps = enic->num_vfs;
2384                 }
2385         }
2386 #endif
2387
2388         /* Allocate structure for port profiles */
2389         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2390         if (!enic->pp) {
2391                 pr_err("port profile alloc failed, aborting\n");
2392                 err = -ENOMEM;
2393                 goto err_out_disable_sriov_pp;
2394         }
2395
2396         /* Issue device open to get device in known state
2397          */
2398
2399         err = enic_dev_open(enic);
2400         if (err) {
2401                 dev_err(dev, "vNIC dev open failed, aborting\n");
2402                 goto err_out_disable_sriov;
2403         }
2404
2405         /* Setup devcmd lock
2406          */
2407
2408         spin_lock_init(&enic->devcmd_lock);
2409
2410         /*
2411          * Set ingress vlan rewrite mode before vnic initialization
2412          */
2413
2414         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2415         if (err) {
2416                 dev_err(dev,
2417                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2418                 goto err_out_dev_close;
2419         }
2420
2421         /* Issue device init to initialize the vnic-to-switch link.
2422          * We'll start with carrier off and wait for link UP
2423          * notification later to turn on carrier.  We don't need
2424          * to wait here for the vnic-to-switch link initialization
2425          * to complete; link UP notification is the indication that
2426          * the process is complete.
2427          */
2428
2429         netif_carrier_off(netdev);
2430
2431         /* Do not call dev_init for a dynamic vnic.
2432          * For a dynamic vnic, init_prov_info will be
2433          * called later by an upper layer.
2434          */
2435
2436         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic)) {
2437                 err = vnic_dev_init(enic->vdev, 0);
2438                 if (err) {
2439                         dev_err(dev, "vNIC dev init failed, aborting\n");
2440                         goto err_out_dev_close;
2441                 }
2442         }
2443
2444         err = enic_dev_init(enic);
2445         if (err) {
2446                 dev_err(dev, "Device initialization failed, aborting\n");
2447                 goto err_out_dev_close;
2448         }
2449
2450         /* Setup notification timer, HW reset task, and wq locks
2451          */
2452
2453         init_timer(&enic->notify_timer);
2454         enic->notify_timer.function = enic_notify_timer;
2455         enic->notify_timer.data = (unsigned long)enic;
2456
2457         INIT_WORK(&enic->reset, enic_reset);
2458         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2459
2460         for (i = 0; i < enic->wq_count; i++)
2461                 spin_lock_init(&enic->wq_lock[i]);
2462
2463         /* Register net device
2464          */
2465
2466         enic->port_mtu = enic->config.mtu;
2467         (void)enic_change_mtu(netdev, enic->port_mtu);
2468
2469 #ifdef CONFIG_PCI_IOV
2470         if (enic_is_sriov_vf(enic) && is_zero_ether_addr(enic->mac_addr))
2471                 random_ether_addr(enic->mac_addr);
2472 #endif
2473
2474         err = enic_set_mac_addr(netdev, enic->mac_addr);
2475         if (err) {
2476                 dev_err(dev, "Invalid MAC address, aborting\n");
2477                 goto err_out_dev_deinit;
2478         }
2479
2480         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2481         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2482
2483         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2484                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2485         else
2486                 netdev->netdev_ops = &enic_netdev_ops;
2487
2488         netdev->watchdog_timeo = 2 * HZ;
2489         netdev->ethtool_ops = &enic_ethtool_ops;
2490
2491         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2492         if (ENIC_SETTING(enic, LOOP)) {
2493                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2494                 enic->loop_enable = 1;
2495                 enic->loop_tag = enic->config.loop_tag;
2496                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2497         }
2498         if (ENIC_SETTING(enic, TXCSUM))
2499                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2500         if (ENIC_SETTING(enic, TSO))
2501                 netdev->hw_features |= NETIF_F_TSO |
2502                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2503         if (ENIC_SETTING(enic, RXCSUM))
2504                 netdev->hw_features |= NETIF_F_RXCSUM;
2505
2506         netdev->features |= netdev->hw_features;
2507
2508         if (using_dac)
2509                 netdev->features |= NETIF_F_HIGHDMA;
2510
2511         netdev->priv_flags |= IFF_UNICAST_FLT;
2512
2513         err = register_netdev(netdev);
2514         if (err) {
2515                 dev_err(dev, "Cannot register net device, aborting\n");
2516                 goto err_out_dev_deinit;
2517         }
2518
2519         return 0;
2520
2521 err_out_dev_deinit:
2522         enic_dev_deinit(enic);
2523 err_out_dev_close:
2524         vnic_dev_close(enic->vdev);
2525 err_out_disable_sriov:
2526         kfree(enic->pp);
2527 err_out_disable_sriov_pp:
2528 #ifdef CONFIG_PCI_IOV
2529         if (enic_sriov_enabled(enic)) {
2530                 pci_disable_sriov(pdev);
2531                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2532         }
2533 err_out_vnic_unregister:
2534 #endif
2535         vnic_dev_unregister(enic->vdev);
2536 err_out_iounmap:
2537         enic_iounmap(enic);
2538 err_out_release_regions:
2539         pci_release_regions(pdev);
2540 err_out_disable_device:
2541         pci_disable_device(pdev);
2542 err_out_free_netdev:
2543         pci_set_drvdata(pdev, NULL);
2544         free_netdev(netdev);
2545
2546         return err;
2547 }
2548
2549 static void __devexit enic_remove(struct pci_dev *pdev)
2550 {
2551         struct net_device *netdev = pci_get_drvdata(pdev);
2552
2553         if (netdev) {
2554                 struct enic *enic = netdev_priv(netdev);
2555
2556                 cancel_work_sync(&enic->reset);
2557                 cancel_work_sync(&enic->change_mtu_work);
2558                 unregister_netdev(netdev);
2559                 enic_dev_deinit(enic);
2560                 vnic_dev_close(enic->vdev);
2561 #ifdef CONFIG_PCI_IOV
2562                 if (enic_sriov_enabled(enic)) {
2563                         pci_disable_sriov(pdev);
2564                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2565                 }
2566 #endif
2567                 kfree(enic->pp);
2568                 vnic_dev_unregister(enic->vdev);
2569                 enic_iounmap(enic);
2570                 pci_release_regions(pdev);
2571                 pci_disable_device(pdev);
2572                 pci_set_drvdata(pdev, NULL);
2573                 free_netdev(netdev);
2574         }
2575 }
2576
2577 static struct pci_driver enic_driver = {
2578         .name = DRV_NAME,
2579         .id_table = enic_id_table,
2580         .probe = enic_probe,
2581         .remove = __devexit_p(enic_remove),
2582 };
2583
2584 static int __init enic_init_module(void)
2585 {
2586         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2587
2588         return pci_register_driver(&enic_driver);
2589 }
2590
2591 static void __exit enic_cleanup_module(void)
2592 {
2593         pci_unregister_driver(&enic_driver);
2594 }
2595
2596 module_init(enic_init_module);
2597 module_exit(enic_cleanup_module);