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         netdev->addr_assign_type &= ~NET_ADDR_RANDOM;
 869
 870         return 0;
 871 }
 872
 873 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 874 {
 875         struct enic *enic = netdev_priv(netdev);
 876         struct sockaddr *saddr = p;
 877         char *addr = saddr->sa_data;
 878         int err;
 879
 880         if (netif_running(enic->netdev)) {
 881                 err = enic_dev_del_station_addr(enic);
 882                 if (err)
 883                         return err;
 884         }
 885
 886         err = enic_set_mac_addr(netdev, addr);
 887         if (err)
 888                 return err;
 889
 890         if (netif_running(enic->netdev)) {
 891                 err = enic_dev_add_station_addr(enic);
 892                 if (err)
 893                         return err;
 894         }
 895
 896         return err;
 897 }
 898
 899 static int enic_set_mac_address(struct net_device *netdev, void *p)
 900 {
 901         struct sockaddr *saddr = p;
 902         char *addr = saddr->sa_data;
 903         struct enic *enic = netdev_priv(netdev);
 904         int err;
 905
 906         err = enic_dev_del_station_addr(enic);
 907         if (err)
 908                 return err;
 909
 910         err = enic_set_mac_addr(netdev, addr);
 911         if (err)
 912                 return err;
 913
 914         return enic_dev_add_station_addr(enic);
 915 }
 916
 917 static void enic_update_multicast_addr_list(struct enic *enic)
 918 {
 919         struct net_device *netdev = enic->netdev;
 920         struct netdev_hw_addr *ha;
 921         unsigned int mc_count = netdev_mc_count(netdev);
 922         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 923         unsigned int i, j;
 924
 925         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 926                 netdev_warn(netdev, "Registering only %d out of %d "
 927                         "multicast addresses\n",
 928                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 929                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 930         }
 931
 932         /* Is there an easier way?  Trying to minimize to
 933          * calls to add/del multicast addrs.  We keep the
 934          * addrs from the last call in enic->mc_addr and
 935          * look for changes to add/del.
 936          */
 937
 938         i = 0;
 939         netdev_for_each_mc_addr(ha, netdev) {
 940                 if (i == mc_count)
 941                         break;
 942                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 943         }
 944
 945         for (i = 0; i < enic->mc_count; i++) {
 946                 for (j = 0; j < mc_count; j++)
 947                         if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
 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 (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
 956                                 break;
 957                 if (j == enic->mc_count)
 958                         enic_dev_add_addr(enic, mc_addr[i]);
 959         }
 960
 961         /* Save the list to compare against next time
 962          */
 963
 964         for (i = 0; i < mc_count; i++)
 965                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 966
 967         enic->mc_count = mc_count;
 968 }
 969
 970 static void enic_update_unicast_addr_list(struct enic *enic)
 971 {
 972         struct net_device *netdev = enic->netdev;
 973         struct netdev_hw_addr *ha;
 974         unsigned int uc_count = netdev_uc_count(netdev);
 975         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 976         unsigned int i, j;
 977
 978         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 979                 netdev_warn(netdev, "Registering only %d out of %d "
 980                         "unicast addresses\n",
 981                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 982                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 983         }
 984
 985         /* Is there an easier way?  Trying to minimize to
 986          * calls to add/del unicast addrs.  We keep the
 987          * addrs from the last call in enic->uc_addr and
 988          * look for changes to add/del.
 989          */
 990
 991         i = 0;
 992         netdev_for_each_uc_addr(ha, netdev) {
 993                 if (i == uc_count)
 994                         break;
 995                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 996         }
 997
 998         for (i = 0; i < enic->uc_count; i++) {
 999                 for (j = 0; j < uc_count; j++)
1000                         if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
1001                                 break;
1002                 if (j == uc_count)
1003                         enic_dev_del_addr(enic, enic->uc_addr[i]);
1004         }
1005
1006         for (i = 0; i < uc_count; i++) {
1007                 for (j = 0; j < enic->uc_count; j++)
1008                         if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
1009                                 break;
1010                 if (j == enic->uc_count)
1011                         enic_dev_add_addr(enic, uc_addr[i]);
1012         }
1013
1014         /* Save the list to compare against next time
1015          */
1016
1017         for (i = 0; i < uc_count; i++)
1018                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1019
1020         enic->uc_count = uc_count;
1021 }
1022
1023 /* netif_tx_lock held, BHs disabled */
1024 static void enic_set_rx_mode(struct net_device *netdev)
1025 {
1026         struct enic *enic = netdev_priv(netdev);
1027         int directed = 1;
1028         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1029         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1030         int promisc = (netdev->flags & IFF_PROMISC) ||
1031                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1032         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1033                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1034         unsigned int flags = netdev->flags |
1035                 (allmulti ? IFF_ALLMULTI : 0) |
1036                 (promisc ? IFF_PROMISC : 0);
1037
1038         if (enic->flags != flags) {
1039                 enic->flags = flags;
1040                 enic_dev_packet_filter(enic, directed,
1041                         multicast, broadcast, promisc, allmulti);
1042         }
1043
1044         if (!promisc) {
1045                 enic_update_unicast_addr_list(enic);
1046                 if (!allmulti)
1047                         enic_update_multicast_addr_list(enic);
1048         }
1049 }
1050
1051 /* netif_tx_lock held, BHs disabled */
1052 static void enic_tx_timeout(struct net_device *netdev)
1053 {
1054         struct enic *enic = netdev_priv(netdev);
1055         schedule_work(&enic->reset);
1056 }
1057
1058 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1059 {
1060         struct enic *enic = netdev_priv(netdev);
1061         struct enic_port_profile *pp;
1062         int err;
1063
1064         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1065         if (err)
1066                 return err;
1067
1068         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1069                 if (vf == PORT_SELF_VF) {
1070                         memcpy(pp->vf_mac, mac, ETH_ALEN);
1071                         return 0;
1072                 } else {
1073                         /*
1074                          * For sriov vf's set the mac in hw
1075                          */
1076                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1077                                 vnic_dev_set_mac_addr, mac);
1078                         return enic_dev_status_to_errno(err);
1079                 }
1080         } else
1081                 return -EINVAL;
1082 }
1083
1084 static int enic_set_vf_port(struct net_device *netdev, int vf,
1085         struct nlattr *port[])
1086 {
1087         struct enic *enic = netdev_priv(netdev);
1088         struct enic_port_profile prev_pp;
1089         struct enic_port_profile *pp;
1090         int err = 0, restore_pp = 1;
1091
1092         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1093         if (err)
1094                 return err;
1095
1096         if (!port[IFLA_PORT_REQUEST])
1097                 return -EOPNOTSUPP;
1098
1099         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1100         memset(pp, 0, sizeof(*enic->pp));
1101
1102         pp->set |= ENIC_SET_REQUEST;
1103         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1104
1105         if (port[IFLA_PORT_PROFILE]) {
1106                 pp->set |= ENIC_SET_NAME;
1107                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1108                         PORT_PROFILE_MAX);
1109         }
1110
1111         if (port[IFLA_PORT_INSTANCE_UUID]) {
1112                 pp->set |= ENIC_SET_INSTANCE;
1113                 memcpy(pp->instance_uuid,
1114                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1115         }
1116
1117         if (port[IFLA_PORT_HOST_UUID]) {
1118                 pp->set |= ENIC_SET_HOST;
1119                 memcpy(pp->host_uuid,
1120                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1121         }
1122
1123         if (vf == PORT_SELF_VF) {
1124                 /* Special case handling: mac came from IFLA_VF_MAC */
1125                 if (!is_zero_ether_addr(prev_pp.vf_mac))
1126                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1127
1128                 if (is_zero_ether_addr(netdev->dev_addr))
1129                         eth_hw_addr_random(netdev);
1130         } else {
1131                 /* SR-IOV VF: get mac from adapter */
1132                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1133                         vnic_dev_get_mac_addr, pp->mac_addr);
1134                 if (err) {
1135                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1136                         memcpy(pp, &prev_pp, sizeof(*pp));
1137                         return enic_dev_status_to_errno(err);
1138                 }
1139         }
1140
1141         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1142         if (err) {
1143                 if (restore_pp) {
1144                         /* Things are still the way they were: Implicit
1145                          * DISASSOCIATE failed
1146                          */
1147                         memcpy(pp, &prev_pp, sizeof(*pp));
1148                 } else {
1149                         memset(pp, 0, sizeof(*pp));
1150                         if (vf == PORT_SELF_VF)
1151                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1152                 }
1153         } else {
1154                 /* Set flag to indicate that the port assoc/disassoc
1155                  * request has been sent out to fw
1156                  */
1157                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1158
1159                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1160                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1161                         memset(pp->mac_addr, 0, ETH_ALEN);
1162                         if (vf == PORT_SELF_VF)
1163                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1164                 }
1165         }
1166
1167         if (vf == PORT_SELF_VF)
1168                 memset(pp->vf_mac, 0, ETH_ALEN);
1169
1170         return err;
1171 }
1172
1173 static int enic_get_vf_port(struct net_device *netdev, int vf,
1174         struct sk_buff *skb)
1175 {
1176         struct enic *enic = netdev_priv(netdev);
1177         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1178         struct enic_port_profile *pp;
1179         int err;
1180
1181         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1182         if (err)
1183                 return err;
1184
1185         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1186                 return -ENODATA;
1187
1188         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1189         if (err)
1190                 return err;
1191
1192         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1193             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1194             ((pp->set & ENIC_SET_NAME) &&
1195              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1196             ((pp->set & ENIC_SET_INSTANCE) &&
1197              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1198                      pp->instance_uuid)) ||
1199             ((pp->set & ENIC_SET_HOST) &&
1200              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1201                 goto nla_put_failure;
1202         return 0;
1203
1204 nla_put_failure:
1205         return -EMSGSIZE;
1206 }
1207
1208 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1209 {
1210         struct enic *enic = vnic_dev_priv(rq->vdev);
1211
1212         if (!buf->os_buf)
1213                 return;
1214
1215         pci_unmap_single(enic->pdev, buf->dma_addr,
1216                 buf->len, PCI_DMA_FROMDEVICE);
1217         dev_kfree_skb_any(buf->os_buf);
1218 }
1219
1220 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1221 {
1222         struct enic *enic = vnic_dev_priv(rq->vdev);
1223         struct net_device *netdev = enic->netdev;
1224         struct sk_buff *skb;
1225         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1226         unsigned int os_buf_index = 0;
1227         dma_addr_t dma_addr;
1228
1229         skb = netdev_alloc_skb_ip_align(netdev, len);
1230         if (!skb)
1231                 return -ENOMEM;
1232
1233         dma_addr = pci_map_single(enic->pdev, skb->data,
1234                 len, PCI_DMA_FROMDEVICE);
1235
1236         enic_queue_rq_desc(rq, skb, os_buf_index,
1237                 dma_addr, len);
1238
1239         return 0;
1240 }
1241
1242 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1243         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1244         int skipped, void *opaque)
1245 {
1246         struct enic *enic = vnic_dev_priv(rq->vdev);
1247         struct net_device *netdev = enic->netdev;
1248         struct sk_buff *skb;
1249
1250         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1251         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1252         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1253         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1254         u8 packet_error;
1255         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1256         u32 rss_hash;
1257
1258         if (skipped)
1259                 return;
1260
1261         skb = buf->os_buf;
1262         prefetch(skb->data - NET_IP_ALIGN);
1263         pci_unmap_single(enic->pdev, buf->dma_addr,
1264                 buf->len, PCI_DMA_FROMDEVICE);
1265
1266         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1267                 &type, &color, &q_number, &completed_index,
1268                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1269                 &csum_not_calc, &rss_hash, &bytes_written,
1270                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1271                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1272                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1273                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1274                 &fcs_ok);
1275
1276         if (packet_error) {
1277
1278                 if (!fcs_ok) {
1279                         if (bytes_written > 0)
1280                                 enic->rq_bad_fcs++;
1281                         else if (bytes_written == 0)
1282                                 enic->rq_truncated_pkts++;
1283                 }
1284
1285                 dev_kfree_skb_any(skb);
1286
1287                 return;
1288         }
1289
1290         if (eop && bytes_written > 0) {
1291
1292                 /* Good receive
1293                  */
1294
1295                 skb_put(skb, bytes_written);
1296                 skb->protocol = eth_type_trans(skb, netdev);
1297
1298                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1299                         skb->csum = htons(checksum);
1300                         skb->ip_summed = CHECKSUM_COMPLETE;
1301                 }
1302
1303                 if (vlan_stripped)
1304                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1305
1306                 if (netdev->features & NETIF_F_GRO)
1307                         napi_gro_receive(&enic->napi[q_number], skb);
1308                 else
1309                         netif_receive_skb(skb);
1310         } else {
1311
1312                 /* Buffer overflow
1313                  */
1314
1315                 dev_kfree_skb_any(skb);
1316         }
1317 }
1318
1319 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1320         u8 type, u16 q_number, u16 completed_index, void *opaque)
1321 {
1322         struct enic *enic = vnic_dev_priv(vdev);
1323
1324         vnic_rq_service(&enic->rq[q_number], cq_desc,
1325                 completed_index, VNIC_RQ_RETURN_DESC,
1326                 enic_rq_indicate_buf, opaque);
1327
1328         return 0;
1329 }
1330
1331 static int enic_poll(struct napi_struct *napi, int budget)
1332 {
1333         struct net_device *netdev = napi->dev;
1334         struct enic *enic = netdev_priv(netdev);
1335         unsigned int cq_rq = enic_cq_rq(enic, 0);
1336         unsigned int cq_wq = enic_cq_wq(enic, 0);
1337         unsigned int intr = enic_legacy_io_intr();
1338         unsigned int rq_work_to_do = budget;
1339         unsigned int wq_work_to_do = -1; /* no limit */
1340         unsigned int  work_done, rq_work_done, wq_work_done;
1341         int err;
1342
1343         /* Service RQ (first) and WQ
1344          */
1345
1346         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1347                 rq_work_to_do, enic_rq_service, NULL);
1348
1349         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1350                 wq_work_to_do, enic_wq_service, NULL);
1351
1352         /* Accumulate intr event credits for this polling
1353          * cycle.  An intr event is the completion of a
1354          * a WQ or RQ packet.
1355          */
1356
1357         work_done = rq_work_done + wq_work_done;
1358
1359         if (work_done > 0)
1360                 vnic_intr_return_credits(&enic->intr[intr],
1361                         work_done,
1362                         0 /* don't unmask intr */,
1363                         0 /* don't reset intr timer */);
1364
1365         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1366
1367         /* Buffer allocation failed. Stay in polling
1368          * mode so we can try to fill the ring again.
1369          */
1370
1371         if (err)
1372                 rq_work_done = rq_work_to_do;
1373
1374         if (rq_work_done < rq_work_to_do) {
1375
1376                 /* Some work done, but not enough to stay in polling,
1377                  * exit polling
1378                  */
1379
1380                 napi_complete(napi);
1381                 vnic_intr_unmask(&enic->intr[intr]);
1382         }
1383
1384         return rq_work_done;
1385 }
1386
1387 static int enic_poll_msix(struct napi_struct *napi, int budget)
1388 {
1389         struct net_device *netdev = napi->dev;
1390         struct enic *enic = netdev_priv(netdev);
1391         unsigned int rq = (napi - &enic->napi[0]);
1392         unsigned int cq = enic_cq_rq(enic, rq);
1393         unsigned int intr = enic_msix_rq_intr(enic, rq);
1394         unsigned int work_to_do = budget;
1395         unsigned int work_done;
1396         int err;
1397
1398         /* Service RQ
1399          */
1400
1401         work_done = vnic_cq_service(&enic->cq[cq],
1402                 work_to_do, enic_rq_service, NULL);
1403
1404         /* Return intr event credits for this polling
1405          * cycle.  An intr event is the completion of a
1406          * RQ packet.
1407          */
1408
1409         if (work_done > 0)
1410                 vnic_intr_return_credits(&enic->intr[intr],
1411                         work_done,
1412                         0 /* don't unmask intr */,
1413                         0 /* don't reset intr timer */);
1414
1415         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1416
1417         /* Buffer allocation failed. Stay in polling mode
1418          * so we can try to fill the ring again.
1419          */
1420
1421         if (err)
1422                 work_done = work_to_do;
1423
1424         if (work_done < work_to_do) {
1425
1426                 /* Some work done, but not enough to stay in polling,
1427                  * exit polling
1428                  */
1429
1430                 napi_complete(napi);
1431                 vnic_intr_unmask(&enic->intr[intr]);
1432         }
1433
1434         return work_done;
1435 }
1436
1437 static void enic_notify_timer(unsigned long data)
1438 {
1439         struct enic *enic = (struct enic *)data;
1440
1441         enic_notify_check(enic);
1442
1443         mod_timer(&enic->notify_timer,
1444                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1445 }
1446
1447 static void enic_free_intr(struct enic *enic)
1448 {
1449         struct net_device *netdev = enic->netdev;
1450         unsigned int i;
1451
1452         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1453         case VNIC_DEV_INTR_MODE_INTX:
1454                 free_irq(enic->pdev->irq, netdev);
1455                 break;
1456         case VNIC_DEV_INTR_MODE_MSI:
1457                 free_irq(enic->pdev->irq, enic);
1458                 break;
1459         case VNIC_DEV_INTR_MODE_MSIX:
1460                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1461                         if (enic->msix[i].requested)
1462                                 free_irq(enic->msix_entry[i].vector,
1463                                         enic->msix[i].devid);
1464                 break;
1465         default:
1466                 break;
1467         }
1468 }
1469
1470 static int enic_request_intr(struct enic *enic)
1471 {
1472         struct net_device *netdev = enic->netdev;
1473         unsigned int i, intr;
1474         int err = 0;
1475
1476         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1477
1478         case VNIC_DEV_INTR_MODE_INTX:
1479
1480                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1481                         IRQF_SHARED, netdev->name, netdev);
1482                 break;
1483
1484         case VNIC_DEV_INTR_MODE_MSI:
1485
1486                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1487                         0, netdev->name, enic);
1488                 break;
1489
1490         case VNIC_DEV_INTR_MODE_MSIX:
1491
1492                 for (i = 0; i < enic->rq_count; i++) {
1493                         intr = enic_msix_rq_intr(enic, i);
1494                         sprintf(enic->msix[intr].devname,
1495                                 "%.11s-rx-%d", netdev->name, i);
1496                         enic->msix[intr].isr = enic_isr_msix_rq;
1497                         enic->msix[intr].devid = &enic->napi[i];
1498                 }
1499
1500                 for (i = 0; i < enic->wq_count; i++) {
1501                         intr = enic_msix_wq_intr(enic, i);
1502                         sprintf(enic->msix[intr].devname,
1503                                 "%.11s-tx-%d", netdev->name, i);
1504                         enic->msix[intr].isr = enic_isr_msix_wq;
1505                         enic->msix[intr].devid = enic;
1506                 }
1507
1508                 intr = enic_msix_err_intr(enic);
1509                 sprintf(enic->msix[intr].devname,
1510                         "%.11s-err", netdev->name);
1511                 enic->msix[intr].isr = enic_isr_msix_err;
1512                 enic->msix[intr].devid = enic;
1513
1514                 intr = enic_msix_notify_intr(enic);
1515                 sprintf(enic->msix[intr].devname,
1516                         "%.11s-notify", netdev->name);
1517                 enic->msix[intr].isr = enic_isr_msix_notify;
1518                 enic->msix[intr].devid = enic;
1519
1520                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1521                         enic->msix[i].requested = 0;
1522
1523                 for (i = 0; i < enic->intr_count; i++) {
1524                         err = request_irq(enic->msix_entry[i].vector,
1525                                 enic->msix[i].isr, 0,
1526                                 enic->msix[i].devname,
1527                                 enic->msix[i].devid);
1528                         if (err) {
1529                                 enic_free_intr(enic);
1530                                 break;
1531                         }
1532                         enic->msix[i].requested = 1;
1533                 }
1534
1535                 break;
1536
1537         default:
1538                 break;
1539         }
1540
1541         return err;
1542 }
1543
1544 static void enic_synchronize_irqs(struct enic *enic)
1545 {
1546         unsigned int i;
1547
1548         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1549         case VNIC_DEV_INTR_MODE_INTX:
1550         case VNIC_DEV_INTR_MODE_MSI:
1551                 synchronize_irq(enic->pdev->irq);
1552                 break;
1553         case VNIC_DEV_INTR_MODE_MSIX:
1554                 for (i = 0; i < enic->intr_count; i++)
1555                         synchronize_irq(enic->msix_entry[i].vector);
1556                 break;
1557         default:
1558                 break;
1559         }
1560 }
1561
1562 static int enic_dev_notify_set(struct enic *enic)
1563 {
1564         int err;
1565
1566         spin_lock(&enic->devcmd_lock);
1567         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1568         case VNIC_DEV_INTR_MODE_INTX:
1569                 err = vnic_dev_notify_set(enic->vdev,
1570                         enic_legacy_notify_intr());
1571                 break;
1572         case VNIC_DEV_INTR_MODE_MSIX:
1573                 err = vnic_dev_notify_set(enic->vdev,
1574                         enic_msix_notify_intr(enic));
1575                 break;
1576         default:
1577                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1578                 break;
1579         }
1580         spin_unlock(&enic->devcmd_lock);
1581
1582         return err;
1583 }
1584
1585 static void enic_notify_timer_start(struct enic *enic)
1586 {
1587         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1588         case VNIC_DEV_INTR_MODE_MSI:
1589                 mod_timer(&enic->notify_timer, jiffies);
1590                 break;
1591         default:
1592                 /* Using intr for notification for INTx/MSI-X */
1593                 break;
1594         }
1595 }
1596
1597 /* rtnl lock is held, process context */
1598 static int enic_open(struct net_device *netdev)
1599 {
1600         struct enic *enic = netdev_priv(netdev);
1601         unsigned int i;
1602         int err;
1603
1604         err = enic_request_intr(enic);
1605         if (err) {
1606                 netdev_err(netdev, "Unable to request irq.\n");
1607                 return err;
1608         }
1609
1610         err = enic_dev_notify_set(enic);
1611         if (err) {
1612                 netdev_err(netdev,
1613                         "Failed to alloc notify buffer, aborting.\n");
1614                 goto err_out_free_intr;
1615         }
1616
1617         for (i = 0; i < enic->rq_count; i++) {
1618                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1619                 /* Need at least one buffer on ring to get going */
1620                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1621                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1622                         err = -ENOMEM;
1623                         goto err_out_notify_unset;
1624                 }
1625         }
1626
1627         for (i = 0; i < enic->wq_count; i++)
1628                 vnic_wq_enable(&enic->wq[i]);
1629         for (i = 0; i < enic->rq_count; i++)
1630                 vnic_rq_enable(&enic->rq[i]);
1631
1632         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1633                 enic_dev_add_station_addr(enic);
1634
1635         enic_set_rx_mode(netdev);
1636
1637         netif_wake_queue(netdev);
1638
1639         for (i = 0; i < enic->rq_count; i++)
1640                 napi_enable(&enic->napi[i]);
1641
1642         enic_dev_enable(enic);
1643
1644         for (i = 0; i < enic->intr_count; i++)
1645                 vnic_intr_unmask(&enic->intr[i]);
1646
1647         enic_notify_timer_start(enic);
1648
1649         return 0;
1650
1651 err_out_notify_unset:
1652         enic_dev_notify_unset(enic);
1653 err_out_free_intr:
1654         enic_free_intr(enic);
1655
1656         return err;
1657 }
1658
1659 /* rtnl lock is held, process context */
1660 static int enic_stop(struct net_device *netdev)
1661 {
1662         struct enic *enic = netdev_priv(netdev);
1663         unsigned int i;
1664         int err;
1665
1666         for (i = 0; i < enic->intr_count; i++) {
1667                 vnic_intr_mask(&enic->intr[i]);
1668                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1669         }
1670
1671         enic_synchronize_irqs(enic);
1672
1673         del_timer_sync(&enic->notify_timer);
1674
1675         enic_dev_disable(enic);
1676
1677         for (i = 0; i < enic->rq_count; i++)
1678                 napi_disable(&enic->napi[i]);
1679
1680         netif_carrier_off(netdev);
1681         netif_tx_disable(netdev);
1682
1683         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1684                 enic_dev_del_station_addr(enic);
1685
1686         for (i = 0; i < enic->wq_count; i++) {
1687                 err = vnic_wq_disable(&enic->wq[i]);
1688                 if (err)
1689                         return err;
1690         }
1691         for (i = 0; i < enic->rq_count; i++) {
1692                 err = vnic_rq_disable(&enic->rq[i]);
1693                 if (err)
1694                         return err;
1695         }
1696
1697         enic_dev_notify_unset(enic);
1698         enic_free_intr(enic);
1699
1700         for (i = 0; i < enic->wq_count; i++)
1701                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1702         for (i = 0; i < enic->rq_count; i++)
1703                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1704         for (i = 0; i < enic->cq_count; i++)
1705                 vnic_cq_clean(&enic->cq[i]);
1706         for (i = 0; i < enic->intr_count; i++)
1707                 vnic_intr_clean(&enic->intr[i]);
1708
1709         return 0;
1710 }
1711
1712 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1713 {
1714         struct enic *enic = netdev_priv(netdev);
1715         int running = netif_running(netdev);
1716
1717         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1718                 return -EINVAL;
1719
1720         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1721                 return -EOPNOTSUPP;
1722
1723         if (running)
1724                 enic_stop(netdev);
1725
1726         netdev->mtu = new_mtu;
1727
1728         if (netdev->mtu > enic->port_mtu)
1729                 netdev_warn(netdev,
1730                         "interface MTU (%d) set higher than port MTU (%d)\n",
1731                         netdev->mtu, enic->port_mtu);
1732
1733         if (running)
1734                 enic_open(netdev);
1735
1736         return 0;
1737 }
1738
1739 static void enic_change_mtu_work(struct work_struct *work)
1740 {
1741         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1742         struct net_device *netdev = enic->netdev;
1743         int new_mtu = vnic_dev_mtu(enic->vdev);
1744         int err;
1745         unsigned int i;
1746
1747         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1748
1749         rtnl_lock();
1750
1751         /* Stop RQ */
1752         del_timer_sync(&enic->notify_timer);
1753
1754         for (i = 0; i < enic->rq_count; i++)
1755                 napi_disable(&enic->napi[i]);
1756
1757         vnic_intr_mask(&enic->intr[0]);
1758         enic_synchronize_irqs(enic);
1759         err = vnic_rq_disable(&enic->rq[0]);
1760         if (err) {
1761                 netdev_err(netdev, "Unable to disable RQ.\n");
1762                 return;
1763         }
1764         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1765         vnic_cq_clean(&enic->cq[0]);
1766         vnic_intr_clean(&enic->intr[0]);
1767
1768         /* Fill RQ with new_mtu-sized buffers */
1769         netdev->mtu = new_mtu;
1770         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1771         /* Need at least one buffer on ring to get going */
1772         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1773                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1774                 return;
1775         }
1776
1777         /* Start RQ */
1778         vnic_rq_enable(&enic->rq[0]);
1779         napi_enable(&enic->napi[0]);
1780         vnic_intr_unmask(&enic->intr[0]);
1781         enic_notify_timer_start(enic);
1782
1783         rtnl_unlock();
1784
1785         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1786 }
1787
1788 #ifdef CONFIG_NET_POLL_CONTROLLER
1789 static void enic_poll_controller(struct net_device *netdev)
1790 {
1791         struct enic *enic = netdev_priv(netdev);
1792         struct vnic_dev *vdev = enic->vdev;
1793         unsigned int i, intr;
1794
1795         switch (vnic_dev_get_intr_mode(vdev)) {
1796         case VNIC_DEV_INTR_MODE_MSIX:
1797                 for (i = 0; i < enic->rq_count; i++) {
1798                         intr = enic_msix_rq_intr(enic, i);
1799                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1800                                 &enic->napi[i]);
1801                 }
1802
1803                 for (i = 0; i < enic->wq_count; i++) {
1804                         intr = enic_msix_wq_intr(enic, i);
1805                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1806                 }
1807
1808                 break;
1809         case VNIC_DEV_INTR_MODE_MSI:
1810                 enic_isr_msi(enic->pdev->irq, enic);
1811                 break;
1812         case VNIC_DEV_INTR_MODE_INTX:
1813                 enic_isr_legacy(enic->pdev->irq, netdev);
1814                 break;
1815         default:
1816                 break;
1817         }
1818 }
1819 #endif
1820
1821 static int enic_dev_wait(struct vnic_dev *vdev,
1822         int (*start)(struct vnic_dev *, int),
1823         int (*finished)(struct vnic_dev *, int *),
1824         int arg)
1825 {
1826         unsigned long time;
1827         int done;
1828         int err;
1829
1830         BUG_ON(in_interrupt());
1831
1832         err = start(vdev, arg);
1833         if (err)
1834                 return err;
1835
1836         /* Wait for func to complete...2 seconds max
1837          */
1838
1839         time = jiffies + (HZ * 2);
1840         do {
1841
1842                 err = finished(vdev, &done);
1843                 if (err)
1844                         return err;
1845
1846                 if (done)
1847                         return 0;
1848
1849                 schedule_timeout_uninterruptible(HZ / 10);
1850
1851         } while (time_after(time, jiffies));
1852
1853         return -ETIMEDOUT;
1854 }
1855
1856 static int enic_dev_open(struct enic *enic)
1857 {
1858         int err;
1859
1860         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1861                 vnic_dev_open_done, 0);
1862         if (err)
1863                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1864                         err);
1865
1866         return err;
1867 }
1868
1869 static int enic_dev_hang_reset(struct enic *enic)
1870 {
1871         int err;
1872
1873         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1874                 vnic_dev_hang_reset_done, 0);
1875         if (err)
1876                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1877                         err);
1878
1879         return err;
1880 }
1881
1882 static int enic_set_rsskey(struct enic *enic)
1883 {
1884         dma_addr_t rss_key_buf_pa;
1885         union vnic_rss_key *rss_key_buf_va = NULL;
1886         union vnic_rss_key rss_key = {
1887                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1888                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1889                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1890                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1891         };
1892         int err;
1893
1894         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1895                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1896         if (!rss_key_buf_va)
1897                 return -ENOMEM;
1898
1899         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1900
1901         spin_lock(&enic->devcmd_lock);
1902         err = enic_set_rss_key(enic,
1903                 rss_key_buf_pa,
1904                 sizeof(union vnic_rss_key));
1905         spin_unlock(&enic->devcmd_lock);
1906
1907         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1908                 rss_key_buf_va, rss_key_buf_pa);
1909
1910         return err;
1911 }
1912
1913 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1914 {
1915         dma_addr_t rss_cpu_buf_pa;
1916         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1917         unsigned int i;
1918         int err;
1919
1920         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1921                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1922         if (!rss_cpu_buf_va)
1923                 return -ENOMEM;
1924
1925         for (i = 0; i < (1 << rss_hash_bits); i++)
1926                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1927
1928         spin_lock(&enic->devcmd_lock);
1929         err = enic_set_rss_cpu(enic,
1930                 rss_cpu_buf_pa,
1931                 sizeof(union vnic_rss_cpu));
1932         spin_unlock(&enic->devcmd_lock);
1933
1934         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1935                 rss_cpu_buf_va, rss_cpu_buf_pa);
1936
1937         return err;
1938 }
1939
1940 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1941         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1942 {
1943         const u8 tso_ipid_split_en = 0;
1944         const u8 ig_vlan_strip_en = 1;
1945         int err;
1946
1947         /* Enable VLAN tag stripping.
1948         */
1949
1950         spin_lock(&enic->devcmd_lock);
1951         err = enic_set_nic_cfg(enic,
1952                 rss_default_cpu, rss_hash_type,
1953                 rss_hash_bits, rss_base_cpu,
1954                 rss_enable, tso_ipid_split_en,
1955                 ig_vlan_strip_en);
1956         spin_unlock(&enic->devcmd_lock);
1957
1958         return err;
1959 }
1960
1961 static int enic_set_rss_nic_cfg(struct enic *enic)
1962 {
1963         struct device *dev = enic_get_dev(enic);
1964         const u8 rss_default_cpu = 0;
1965         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1966                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1967                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1968                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1969         const u8 rss_hash_bits = 7;
1970         const u8 rss_base_cpu = 0;
1971         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1972
1973         if (rss_enable) {
1974                 if (!enic_set_rsskey(enic)) {
1975                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1976                                 rss_enable = 0;
1977                                 dev_warn(dev, "RSS disabled, "
1978                                         "Failed to set RSS cpu indirection table.");
1979                         }
1980                 } else {
1981                         rss_enable = 0;
1982                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1983                 }
1984         }
1985
1986         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1987                 rss_hash_bits, rss_base_cpu, rss_enable);
1988 }
1989
1990 static void enic_reset(struct work_struct *work)
1991 {
1992         struct enic *enic = container_of(work, struct enic, reset);
1993
1994         if (!netif_running(enic->netdev))
1995                 return;
1996
1997         rtnl_lock();
1998
1999         enic_dev_hang_notify(enic);
2000         enic_stop(enic->netdev);
2001         enic_dev_hang_reset(enic);
2002         enic_reset_addr_lists(enic);
2003         enic_init_vnic_resources(enic);
2004         enic_set_rss_nic_cfg(enic);
2005         enic_dev_set_ig_vlan_rewrite_mode(enic);
2006         enic_open(enic->netdev);
2007
2008         rtnl_unlock();
2009 }
2010
2011 static int enic_set_intr_mode(struct enic *enic)
2012 {
2013         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2014         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2015         unsigned int i;
2016
2017         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2018          * on system capabilities.
2019          *
2020          * Try MSI-X first
2021          *
2022          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2023          * (the second to last INTR is used for WQ/RQ errors)
2024          * (the last INTR is used for notifications)
2025          */
2026
2027         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2028         for (i = 0; i < n + m + 2; i++)
2029                 enic->msix_entry[i].entry = i;
2030
2031         /* Use multiple RQs if RSS is enabled
2032          */
2033
2034         if (ENIC_SETTING(enic, RSS) &&
2035             enic->config.intr_mode < 1 &&
2036             enic->rq_count >= n &&
2037             enic->wq_count >= m &&
2038             enic->cq_count >= n + m &&
2039             enic->intr_count >= n + m + 2) {
2040
2041                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2042
2043                         enic->rq_count = n;
2044                         enic->wq_count = m;
2045                         enic->cq_count = n + m;
2046                         enic->intr_count = n + m + 2;
2047
2048                         vnic_dev_set_intr_mode(enic->vdev,
2049                                 VNIC_DEV_INTR_MODE_MSIX);
2050
2051                         return 0;
2052                 }
2053         }
2054
2055         if (enic->config.intr_mode < 1 &&
2056             enic->rq_count >= 1 &&
2057             enic->wq_count >= m &&
2058             enic->cq_count >= 1 + m &&
2059             enic->intr_count >= 1 + m + 2) {
2060                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2061
2062                         enic->rq_count = 1;
2063                         enic->wq_count = m;
2064                         enic->cq_count = 1 + m;
2065                         enic->intr_count = 1 + m + 2;
2066
2067                         vnic_dev_set_intr_mode(enic->vdev,
2068                                 VNIC_DEV_INTR_MODE_MSIX);
2069
2070                         return 0;
2071                 }
2072         }
2073
2074         /* Next try MSI
2075          *
2076          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2077          */
2078
2079         if (enic->config.intr_mode < 2 &&
2080             enic->rq_count >= 1 &&
2081             enic->wq_count >= 1 &&
2082             enic->cq_count >= 2 &&
2083             enic->intr_count >= 1 &&
2084             !pci_enable_msi(enic->pdev)) {
2085
2086                 enic->rq_count = 1;
2087                 enic->wq_count = 1;
2088                 enic->cq_count = 2;
2089                 enic->intr_count = 1;
2090
2091                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2092
2093                 return 0;
2094         }
2095
2096         /* Next try INTx
2097          *
2098          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2099          * (the first INTR is used for WQ/RQ)
2100          * (the second INTR is used for WQ/RQ errors)
2101          * (the last INTR is used for notifications)
2102          */
2103
2104         if (enic->config.intr_mode < 3 &&
2105             enic->rq_count >= 1 &&
2106             enic->wq_count >= 1 &&
2107             enic->cq_count >= 2 &&
2108             enic->intr_count >= 3) {
2109
2110                 enic->rq_count = 1;
2111                 enic->wq_count = 1;
2112                 enic->cq_count = 2;
2113                 enic->intr_count = 3;
2114
2115                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2116
2117                 return 0;
2118         }
2119
2120         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2121
2122         return -EINVAL;
2123 }
2124
2125 static void enic_clear_intr_mode(struct enic *enic)
2126 {
2127         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2128         case VNIC_DEV_INTR_MODE_MSIX:
2129                 pci_disable_msix(enic->pdev);
2130                 break;
2131         case VNIC_DEV_INTR_MODE_MSI:
2132                 pci_disable_msi(enic->pdev);
2133                 break;
2134         default:
2135                 break;
2136         }
2137
2138         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2139 }
2140
2141 static const struct net_device_ops enic_netdev_dynamic_ops = {
2142         .ndo_open               = enic_open,
2143         .ndo_stop               = enic_stop,
2144         .ndo_start_xmit         = enic_hard_start_xmit,
2145         .ndo_get_stats64        = enic_get_stats,
2146         .ndo_validate_addr      = eth_validate_addr,
2147         .ndo_set_rx_mode        = enic_set_rx_mode,
2148         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2149         .ndo_change_mtu         = enic_change_mtu,
2150         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2151         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2152         .ndo_tx_timeout         = enic_tx_timeout,
2153         .ndo_set_vf_port        = enic_set_vf_port,
2154         .ndo_get_vf_port        = enic_get_vf_port,
2155         .ndo_set_vf_mac         = enic_set_vf_mac,
2156 #ifdef CONFIG_NET_POLL_CONTROLLER
2157         .ndo_poll_controller    = enic_poll_controller,
2158 #endif
2159 };
2160
2161 static const struct net_device_ops enic_netdev_ops = {
2162         .ndo_open               = enic_open,
2163         .ndo_stop               = enic_stop,
2164         .ndo_start_xmit         = enic_hard_start_xmit,
2165         .ndo_get_stats64        = enic_get_stats,
2166         .ndo_validate_addr      = eth_validate_addr,
2167         .ndo_set_mac_address    = enic_set_mac_address,
2168         .ndo_set_rx_mode        = enic_set_rx_mode,
2169         .ndo_change_mtu         = enic_change_mtu,
2170         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2171         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2172         .ndo_tx_timeout         = enic_tx_timeout,
2173         .ndo_set_vf_port        = enic_set_vf_port,
2174         .ndo_get_vf_port        = enic_get_vf_port,
2175         .ndo_set_vf_mac         = enic_set_vf_mac,
2176 #ifdef CONFIG_NET_POLL_CONTROLLER
2177         .ndo_poll_controller    = enic_poll_controller,
2178 #endif
2179 };
2180
2181 static void enic_dev_deinit(struct enic *enic)
2182 {
2183         unsigned int i;
2184
2185         for (i = 0; i < enic->rq_count; i++)
2186                 netif_napi_del(&enic->napi[i]);
2187
2188         enic_free_vnic_resources(enic);
2189         enic_clear_intr_mode(enic);
2190 }
2191
2192 static int enic_dev_init(struct enic *enic)
2193 {
2194         struct device *dev = enic_get_dev(enic);
2195         struct net_device *netdev = enic->netdev;
2196         unsigned int i;
2197         int err;
2198
2199         /* Get interrupt coalesce timer info */
2200         err = enic_dev_intr_coal_timer_info(enic);
2201         if (err) {
2202                 dev_warn(dev, "Using default conversion factor for "
2203                         "interrupt coalesce timer\n");
2204                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2205         }
2206
2207         /* Get vNIC configuration
2208          */
2209
2210         err = enic_get_vnic_config(enic);
2211         if (err) {
2212                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2213                 return err;
2214         }
2215
2216         /* Get available resource counts
2217          */
2218
2219         enic_get_res_counts(enic);
2220
2221         /* Set interrupt mode based on resource counts and system
2222          * capabilities
2223          */
2224
2225         err = enic_set_intr_mode(enic);
2226         if (err) {
2227                 dev_err(dev, "Failed to set intr mode based on resource "
2228                         "counts and system capabilities, aborting\n");
2229                 return err;
2230         }
2231
2232         /* Allocate and configure vNIC resources
2233          */
2234
2235         err = enic_alloc_vnic_resources(enic);
2236         if (err) {
2237                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2238                 goto err_out_free_vnic_resources;
2239         }
2240
2241         enic_init_vnic_resources(enic);
2242
2243         err = enic_set_rss_nic_cfg(enic);
2244         if (err) {
2245                 dev_err(dev, "Failed to config nic, aborting\n");
2246                 goto err_out_free_vnic_resources;
2247         }
2248
2249         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2250         default:
2251                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2252                 break;
2253         case VNIC_DEV_INTR_MODE_MSIX:
2254                 for (i = 0; i < enic->rq_count; i++)
2255                         netif_napi_add(netdev, &enic->napi[i],
2256                                 enic_poll_msix, 64);
2257                 break;
2258         }
2259
2260         return 0;
2261
2262 err_out_free_vnic_resources:
2263         enic_clear_intr_mode(enic);
2264         enic_free_vnic_resources(enic);
2265
2266         return err;
2267 }
2268
2269 static void enic_iounmap(struct enic *enic)
2270 {
2271         unsigned int i;
2272
2273         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2274                 if (enic->bar[i].vaddr)
2275                         iounmap(enic->bar[i].vaddr);
2276 }
2277
2278 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2279 {
2280         struct device *dev = &pdev->dev;
2281         struct net_device *netdev;
2282         struct enic *enic;
2283         int using_dac = 0;
2284         unsigned int i;
2285         int err;
2286 #ifdef CONFIG_PCI_IOV
2287         int pos = 0;
2288 #endif
2289         int num_pps = 1;
2290
2291         /* Allocate net device structure and initialize.  Private
2292          * instance data is initialized to zero.
2293          */
2294
2295         netdev = alloc_etherdev(sizeof(struct enic));
2296         if (!netdev)
2297                 return -ENOMEM;
2298
2299         pci_set_drvdata(pdev, netdev);
2300
2301         SET_NETDEV_DEV(netdev, &pdev->dev);
2302
2303         enic = netdev_priv(netdev);
2304         enic->netdev = netdev;
2305         enic->pdev = pdev;
2306
2307         /* Setup PCI resources
2308          */
2309
2310         err = pci_enable_device_mem(pdev);
2311         if (err) {
2312                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2313                 goto err_out_free_netdev;
2314         }
2315
2316         err = pci_request_regions(pdev, DRV_NAME);
2317         if (err) {
2318                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2319                 goto err_out_disable_device;
2320         }
2321
2322         pci_set_master(pdev);
2323
2324         /* Query PCI controller on system for DMA addressing
2325          * limitation for the device.  Try 40-bit first, and
2326          * fail to 32-bit.
2327          */
2328
2329         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2330         if (err) {
2331                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2332                 if (err) {
2333                         dev_err(dev, "No usable DMA configuration, aborting\n");
2334                         goto err_out_release_regions;
2335                 }
2336                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2337                 if (err) {
2338                         dev_err(dev, "Unable to obtain %u-bit DMA "
2339                                 "for consistent allocations, aborting\n", 32);
2340                         goto err_out_release_regions;
2341                 }
2342         } else {
2343                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2344                 if (err) {
2345                         dev_err(dev, "Unable to obtain %u-bit DMA "
2346                                 "for consistent allocations, aborting\n", 40);
2347                         goto err_out_release_regions;
2348                 }
2349                 using_dac = 1;
2350         }
2351
2352         /* Map vNIC resources from BAR0-5
2353          */
2354
2355         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2356                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2357                         continue;
2358                 enic->bar[i].len = pci_resource_len(pdev, i);
2359                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2360                 if (!enic->bar[i].vaddr) {
2361                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2362                         err = -ENODEV;
2363                         goto err_out_iounmap;
2364                 }
2365                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2366         }
2367
2368         /* Register vNIC device
2369          */
2370
2371         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2372                 ARRAY_SIZE(enic->bar));
2373         if (!enic->vdev) {
2374                 dev_err(dev, "vNIC registration failed, aborting\n");
2375                 err = -ENODEV;
2376                 goto err_out_iounmap;
2377         }
2378
2379 #ifdef CONFIG_PCI_IOV
2380         /* Get number of subvnics */
2381         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2382         if (pos) {
2383                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2384                         &enic->num_vfs);
2385                 if (enic->num_vfs) {
2386                         err = pci_enable_sriov(pdev, enic->num_vfs);
2387                         if (err) {
2388                                 dev_err(dev, "SRIOV enable failed, aborting."
2389                                         " pci_enable_sriov() returned %d\n",
2390                                         err);
2391                                 goto err_out_vnic_unregister;
2392                         }
2393                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2394                         num_pps = enic->num_vfs;
2395                 }
2396         }
2397 #endif
2398
2399         /* Allocate structure for port profiles */
2400         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2401         if (!enic->pp) {
2402                 err = -ENOMEM;
2403                 goto err_out_disable_sriov_pp;
2404         }
2405
2406         /* Issue device open to get device in known state
2407          */
2408
2409         err = enic_dev_open(enic);
2410         if (err) {
2411                 dev_err(dev, "vNIC dev open failed, aborting\n");
2412                 goto err_out_disable_sriov;
2413         }
2414
2415         /* Setup devcmd lock
2416          */
2417
2418         spin_lock_init(&enic->devcmd_lock);
2419
2420         /*
2421          * Set ingress vlan rewrite mode before vnic initialization
2422          */
2423
2424         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2425         if (err) {
2426                 dev_err(dev,
2427                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2428                 goto err_out_dev_close;
2429         }
2430
2431         /* Issue device init to initialize the vnic-to-switch link.
2432          * We'll start with carrier off and wait for link UP
2433          * notification later to turn on carrier.  We don't need
2434          * to wait here for the vnic-to-switch link initialization
2435          * to complete; link UP notification is the indication that
2436          * the process is complete.
2437          */
2438
2439         netif_carrier_off(netdev);
2440
2441         /* Do not call dev_init for a dynamic vnic.
2442          * For a dynamic vnic, init_prov_info will be
2443          * called later by an upper layer.
2444          */
2445
2446         if (!enic_is_dynamic(enic)) {
2447                 err = vnic_dev_init(enic->vdev, 0);
2448                 if (err) {
2449                         dev_err(dev, "vNIC dev init failed, aborting\n");
2450                         goto err_out_dev_close;
2451                 }
2452         }
2453
2454         err = enic_dev_init(enic);
2455         if (err) {
2456                 dev_err(dev, "Device initialization failed, aborting\n");
2457                 goto err_out_dev_close;
2458         }
2459
2460         /* Setup notification timer, HW reset task, and wq locks
2461          */
2462
2463         init_timer(&enic->notify_timer);
2464         enic->notify_timer.function = enic_notify_timer;
2465         enic->notify_timer.data = (unsigned long)enic;
2466
2467         INIT_WORK(&enic->reset, enic_reset);
2468         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2469
2470         for (i = 0; i < enic->wq_count; i++)
2471                 spin_lock_init(&enic->wq_lock[i]);
2472
2473         /* Register net device
2474          */
2475
2476         enic->port_mtu = enic->config.mtu;
2477         (void)enic_change_mtu(netdev, enic->port_mtu);
2478
2479         err = enic_set_mac_addr(netdev, enic->mac_addr);
2480         if (err) {
2481                 dev_err(dev, "Invalid MAC address, aborting\n");
2482                 goto err_out_dev_deinit;
2483         }
2484
2485         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2486         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2487
2488         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2489                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2490         else
2491                 netdev->netdev_ops = &enic_netdev_ops;
2492
2493         netdev->watchdog_timeo = 2 * HZ;
2494         netdev->ethtool_ops = &enic_ethtool_ops;
2495
2496         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2497         if (ENIC_SETTING(enic, LOOP)) {
2498                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2499                 enic->loop_enable = 1;
2500                 enic->loop_tag = enic->config.loop_tag;
2501                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2502         }
2503         if (ENIC_SETTING(enic, TXCSUM))
2504                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2505         if (ENIC_SETTING(enic, TSO))
2506                 netdev->hw_features |= NETIF_F_TSO |
2507                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2508         if (ENIC_SETTING(enic, RXCSUM))
2509                 netdev->hw_features |= NETIF_F_RXCSUM;
2510
2511         netdev->features |= netdev->hw_features;
2512
2513         if (using_dac)
2514                 netdev->features |= NETIF_F_HIGHDMA;
2515
2516         netdev->priv_flags |= IFF_UNICAST_FLT;
2517
2518         err = register_netdev(netdev);
2519         if (err) {
2520                 dev_err(dev, "Cannot register net device, aborting\n");
2521                 goto err_out_dev_deinit;
2522         }
2523
2524         return 0;
2525
2526 err_out_dev_deinit:
2527         enic_dev_deinit(enic);
2528 err_out_dev_close:
2529         vnic_dev_close(enic->vdev);
2530 err_out_disable_sriov:
2531         kfree(enic->pp);
2532 err_out_disable_sriov_pp:
2533 #ifdef CONFIG_PCI_IOV
2534         if (enic_sriov_enabled(enic)) {
2535                 pci_disable_sriov(pdev);
2536                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2537         }
2538 err_out_vnic_unregister:
2539 #endif
2540         vnic_dev_unregister(enic->vdev);
2541 err_out_iounmap:
2542         enic_iounmap(enic);
2543 err_out_release_regions:
2544         pci_release_regions(pdev);
2545 err_out_disable_device:
2546         pci_disable_device(pdev);
2547 err_out_free_netdev:
2548         pci_set_drvdata(pdev, NULL);
2549         free_netdev(netdev);
2550
2551         return err;
2552 }
2553
2554 static void enic_remove(struct pci_dev *pdev)
2555 {
2556         struct net_device *netdev = pci_get_drvdata(pdev);
2557
2558         if (netdev) {
2559                 struct enic *enic = netdev_priv(netdev);
2560
2561                 cancel_work_sync(&enic->reset);
2562                 cancel_work_sync(&enic->change_mtu_work);
2563                 unregister_netdev(netdev);
2564                 enic_dev_deinit(enic);
2565                 vnic_dev_close(enic->vdev);
2566 #ifdef CONFIG_PCI_IOV
2567                 if (enic_sriov_enabled(enic)) {
2568                         pci_disable_sriov(pdev);
2569                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2570                 }
2571 #endif
2572                 kfree(enic->pp);
2573                 vnic_dev_unregister(enic->vdev);
2574                 enic_iounmap(enic);
2575                 pci_release_regions(pdev);
2576                 pci_disable_device(pdev);
2577                 pci_set_drvdata(pdev, NULL);
2578                 free_netdev(netdev);
2579         }
2580 }
2581
2582 static struct pci_driver enic_driver = {
2583         .name = DRV_NAME,
2584         .id_table = enic_id_table,
2585         .probe = enic_probe,
2586         .remove = enic_remove,
2587 };
2588
2589 static int __init enic_init_module(void)
2590 {
2591         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2592
2593         return pci_register_driver(&enic_driver);
2594 }
2595
2596 static void __exit enic_cleanup_module(void)
2597 {
2598         pci_unregister_driver(&enic_driver);
2599 }
2600
2601 module_init(enic_init_module);
2602 module_exit(enic_cleanup_module);