drivers/net/ethernet/cisco/enic/enic_main.c

   1 /*
   2  * Copyright 2008-2010 Cisco Systems, Inc.  All rights reserved.
   3  * Copyright 2007 Nuova Systems, Inc.  All rights reserved.
   4  *
   5  * This program is free software; you may redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; version 2 of the License.
   8  *
   9  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  10  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  11  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  12  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  13  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  14  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  15  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  16  * SOFTWARE.
  17  *
  18  */
  19
  20 #include <linux/module.h>
  21 #include <linux/kernel.h>
  22 #include <linux/string.h>
  23 #include <linux/errno.h>
  24 #include <linux/types.h>
  25 #include <linux/init.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/workqueue.h>
  28 #include <linux/pci.h>
  29 #include <linux/netdevice.h>
  30 #include <linux/etherdevice.h>
  31 #include <linux/if.h>
  32 #include <linux/if_ether.h>
  33 #include <linux/if_vlan.h>
  34 #include <linux/ethtool.h>
  35 #include <linux/in.h>
  36 #include <linux/ip.h>
  37 #include <linux/ipv6.h>
  38 #include <linux/tcp.h>
  39 #include <linux/rtnetlink.h>
  40 #include <linux/prefetch.h>
  41 #include <net/ip6_checksum.h>
  42
  43 #include "cq_enet_desc.h"
  44 #include "vnic_dev.h"
  45 #include "vnic_intr.h"
  46 #include "vnic_stats.h"
  47 #include "vnic_vic.h"
  48 #include "enic_res.h"
  49 #include "enic.h"
  50 #include "enic_dev.h"
  51 #include "enic_pp.h"
  52
  53 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  54 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  55 #define MAX_TSO                         (1 << 16)
  56 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  57
  58 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  59 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  60 #define PCI_DEVICE_ID_CISCO_VIC_ENET_VF      0x0071  /* enet SRIOV VF */
  61
  62 /* Supported devices */
  63 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  64         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  65         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  66         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_VF) },
  67         { 0, }  /* end of table */
  68 };
  69
  70 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  71 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  72 MODULE_LICENSE("GPL");
  73 MODULE_VERSION(DRV_VERSION);
  74 MODULE_DEVICE_TABLE(pci, enic_id_table);
  75
  76 struct enic_stat {
  77         char name[ETH_GSTRING_LEN];
  78         unsigned int offset;
  79 };
  80
  81 #define ENIC_TX_STAT(stat)      \
  82         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  83 #define ENIC_RX_STAT(stat)      \
  84         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  85
  86 static const struct enic_stat enic_tx_stats[] = {
  87         ENIC_TX_STAT(tx_frames_ok),
  88         ENIC_TX_STAT(tx_unicast_frames_ok),
  89         ENIC_TX_STAT(tx_multicast_frames_ok),
  90         ENIC_TX_STAT(tx_broadcast_frames_ok),
  91         ENIC_TX_STAT(tx_bytes_ok),
  92         ENIC_TX_STAT(tx_unicast_bytes_ok),
  93         ENIC_TX_STAT(tx_multicast_bytes_ok),
  94         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  95         ENIC_TX_STAT(tx_drops),
  96         ENIC_TX_STAT(tx_errors),
  97         ENIC_TX_STAT(tx_tso),
  98 };
  99
 100 static const struct enic_stat enic_rx_stats[] = {
 101         ENIC_RX_STAT(rx_frames_ok),
 102         ENIC_RX_STAT(rx_frames_total),
 103         ENIC_RX_STAT(rx_unicast_frames_ok),
 104         ENIC_RX_STAT(rx_multicast_frames_ok),
 105         ENIC_RX_STAT(rx_broadcast_frames_ok),
 106         ENIC_RX_STAT(rx_bytes_ok),
 107         ENIC_RX_STAT(rx_unicast_bytes_ok),
 108         ENIC_RX_STAT(rx_multicast_bytes_ok),
 109         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 110         ENIC_RX_STAT(rx_drop),
 111         ENIC_RX_STAT(rx_no_bufs),
 112         ENIC_RX_STAT(rx_errors),
 113         ENIC_RX_STAT(rx_rss),
 114         ENIC_RX_STAT(rx_crc_errors),
 115         ENIC_RX_STAT(rx_frames_64),
 116         ENIC_RX_STAT(rx_frames_127),
 117         ENIC_RX_STAT(rx_frames_255),
 118         ENIC_RX_STAT(rx_frames_511),
 119         ENIC_RX_STAT(rx_frames_1023),
 120         ENIC_RX_STAT(rx_frames_1518),
 121         ENIC_RX_STAT(rx_frames_to_max),
 122 };
 123
 124 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 125 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 126
 127 int enic_is_dynamic(struct enic *enic)
 128 {
 129         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 130 }
 131
 132 int enic_sriov_enabled(struct enic *enic)
 133 {
 134         return (enic->priv_flags & ENIC_SRIOV_ENABLED) ? 1 : 0;
 135 }
 136
 137 static int enic_is_sriov_vf(struct enic *enic)
 138 {
 139         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_VF;
 140 }
 141
 142 int enic_is_valid_vf(struct enic *enic, int vf)
 143 {
 144 #ifdef CONFIG_PCI_IOV
 145         return vf >= 0 && vf < enic->num_vfs;
 146 #else
 147         return 0;
 148 #endif
 149 }
 150
 151 static inline unsigned int enic_cq_rq(struct enic *enic, unsigned int rq)
 152 {
 153         return rq;
 154 }
 155
 156 static inline unsigned int enic_cq_wq(struct enic *enic, unsigned int wq)
 157 {
 158         return enic->rq_count + wq;
 159 }
 160
 161 static inline unsigned int enic_legacy_io_intr(void)
 162 {
 163         return 0;
 164 }
 165
 166 static inline unsigned int enic_legacy_err_intr(void)
 167 {
 168         return 1;
 169 }
 170
 171 static inline unsigned int enic_legacy_notify_intr(void)
 172 {
 173         return 2;
 174 }
 175
 176 static inline unsigned int enic_msix_rq_intr(struct enic *enic, unsigned int rq)
 177 {
 178         return enic->cq[enic_cq_rq(enic, rq)].interrupt_offset;
 179 }
 180
 181 static inline unsigned int enic_msix_wq_intr(struct enic *enic, unsigned int wq)
 182 {
 183         return enic->cq[enic_cq_wq(enic, wq)].interrupt_offset;
 184 }
 185
 186 static inline unsigned int enic_msix_err_intr(struct enic *enic)
 187 {
 188         return enic->rq_count + enic->wq_count;
 189 }
 190
 191 static inline unsigned int enic_msix_notify_intr(struct enic *enic)
 192 {
 193         return enic->rq_count + enic->wq_count + 1;
 194 }
 195
 196 static int enic_get_settings(struct net_device *netdev,
 197         struct ethtool_cmd *ecmd)
 198 {
 199         struct enic *enic = netdev_priv(netdev);
 200
 201         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 202         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 203         ecmd->port = PORT_FIBRE;
 204         ecmd->transceiver = XCVR_EXTERNAL;
 205
 206         if (netif_carrier_ok(netdev)) {
 207                 ethtool_cmd_speed_set(ecmd, vnic_dev_port_speed(enic->vdev));
 208                 ecmd->duplex = DUPLEX_FULL;
 209         } else {
 210                 ethtool_cmd_speed_set(ecmd, -1);
 211                 ecmd->duplex = -1;
 212         }
 213
 214         ecmd->autoneg = AUTONEG_DISABLE;
 215
 216         return 0;
 217 }
 218
 219 static void enic_get_drvinfo(struct net_device *netdev,
 220         struct ethtool_drvinfo *drvinfo)
 221 {
 222         struct enic *enic = netdev_priv(netdev);
 223         struct vnic_devcmd_fw_info *fw_info;
 224
 225         enic_dev_fw_info(enic, &fw_info);
 226
 227         strlcpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 228         strlcpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 229         strlcpy(drvinfo->fw_version, fw_info->fw_version,
 230                 sizeof(drvinfo->fw_version));
 231         strlcpy(drvinfo->bus_info, pci_name(enic->pdev),
 232                 sizeof(drvinfo->bus_info));
 233 }
 234
 235 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 236 {
 237         unsigned int i;
 238
 239         switch (stringset) {
 240         case ETH_SS_STATS:
 241                 for (i = 0; i < enic_n_tx_stats; i++) {
 242                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 243                         data += ETH_GSTRING_LEN;
 244                 }
 245                 for (i = 0; i < enic_n_rx_stats; i++) {
 246                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 247                         data += ETH_GSTRING_LEN;
 248                 }
 249                 break;
 250         }
 251 }
 252
 253 static int enic_get_sset_count(struct net_device *netdev, int sset)
 254 {
 255         switch (sset) {
 256         case ETH_SS_STATS:
 257                 return enic_n_tx_stats + enic_n_rx_stats;
 258         default:
 259                 return -EOPNOTSUPP;
 260         }
 261 }
 262
 263 static void enic_get_ethtool_stats(struct net_device *netdev,
 264         struct ethtool_stats *stats, u64 *data)
 265 {
 266         struct enic *enic = netdev_priv(netdev);
 267         struct vnic_stats *vstats;
 268         unsigned int i;
 269
 270         enic_dev_stats_dump(enic, &vstats);
 271
 272         for (i = 0; i < enic_n_tx_stats; i++)
 273                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 274         for (i = 0; i < enic_n_rx_stats; i++)
 275                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 276 }
 277
 278 static u32 enic_get_msglevel(struct net_device *netdev)
 279 {
 280         struct enic *enic = netdev_priv(netdev);
 281         return enic->msg_enable;
 282 }
 283
 284 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 285 {
 286         struct enic *enic = netdev_priv(netdev);
 287         enic->msg_enable = value;
 288 }
 289
 290 static int enic_get_coalesce(struct net_device *netdev,
 291         struct ethtool_coalesce *ecmd)
 292 {
 293         struct enic *enic = netdev_priv(netdev);
 294
 295         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 296         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 297
 298         return 0;
 299 }
 300
 301 static int enic_set_coalesce(struct net_device *netdev,
 302         struct ethtool_coalesce *ecmd)
 303 {
 304         struct enic *enic = netdev_priv(netdev);
 305         u32 tx_coalesce_usecs;
 306         u32 rx_coalesce_usecs;
 307         unsigned int i, intr;
 308
 309         tx_coalesce_usecs = min_t(u32, ecmd->tx_coalesce_usecs,
 310                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 311         rx_coalesce_usecs = min_t(u32, ecmd->rx_coalesce_usecs,
 312                 vnic_dev_get_intr_coal_timer_max(enic->vdev));
 313
 314         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 315         case VNIC_DEV_INTR_MODE_INTX:
 316                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 317                         return -EINVAL;
 318
 319                 intr = enic_legacy_io_intr();
 320                 vnic_intr_coalescing_timer_set(&enic->intr[intr],
 321                         tx_coalesce_usecs);
 322                 break;
 323         case VNIC_DEV_INTR_MODE_MSI:
 324                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 325                         return -EINVAL;
 326
 327                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 328                         tx_coalesce_usecs);
 329                 break;
 330         case VNIC_DEV_INTR_MODE_MSIX:
 331                 for (i = 0; i < enic->wq_count; i++) {
 332                         intr = enic_msix_wq_intr(enic, i);
 333                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 334                                 tx_coalesce_usecs);
 335                 }
 336
 337                 for (i = 0; i < enic->rq_count; i++) {
 338                         intr = enic_msix_rq_intr(enic, i);
 339                         vnic_intr_coalescing_timer_set(&enic->intr[intr],
 340                                 rx_coalesce_usecs);
 341                 }
 342
 343                 break;
 344         default:
 345                 break;
 346         }
 347
 348         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 349         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 350
 351         return 0;
 352 }
 353
 354 static const struct ethtool_ops enic_ethtool_ops = {
 355         .get_settings = enic_get_settings,
 356         .get_drvinfo = enic_get_drvinfo,
 357         .get_msglevel = enic_get_msglevel,
 358         .set_msglevel = enic_set_msglevel,
 359         .get_link = ethtool_op_get_link,
 360         .get_strings = enic_get_strings,
 361         .get_sset_count = enic_get_sset_count,
 362         .get_ethtool_stats = enic_get_ethtool_stats,
 363         .get_coalesce = enic_get_coalesce,
 364         .set_coalesce = enic_set_coalesce,
 365 };
 366
 367 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 368 {
 369         struct enic *enic = vnic_dev_priv(wq->vdev);
 370
 371         if (buf->sop)
 372                 pci_unmap_single(enic->pdev, buf->dma_addr,
 373                         buf->len, PCI_DMA_TODEVICE);
 374         else
 375                 pci_unmap_page(enic->pdev, buf->dma_addr,
 376                         buf->len, PCI_DMA_TODEVICE);
 377
 378         if (buf->os_buf)
 379                 dev_kfree_skb_any(buf->os_buf);
 380 }
 381
 382 static void enic_wq_free_buf(struct vnic_wq *wq,
 383         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 384 {
 385         enic_free_wq_buf(wq, buf);
 386 }
 387
 388 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 389         u8 type, u16 q_number, u16 completed_index, void *opaque)
 390 {
 391         struct enic *enic = vnic_dev_priv(vdev);
 392
 393         spin_lock(&enic->wq_lock[q_number]);
 394
 395         vnic_wq_service(&enic->wq[q_number], cq_desc,
 396                 completed_index, enic_wq_free_buf,
 397                 opaque);
 398
 399         if (netif_queue_stopped(enic->netdev) &&
 400             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 401             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 402                 netif_wake_queue(enic->netdev);
 403
 404         spin_unlock(&enic->wq_lock[q_number]);
 405
 406         return 0;
 407 }
 408
 409 static void enic_log_q_error(struct enic *enic)
 410 {
 411         unsigned int i;
 412         u32 error_status;
 413
 414         for (i = 0; i < enic->wq_count; i++) {
 415                 error_status = vnic_wq_error_status(&enic->wq[i]);
 416                 if (error_status)
 417                         netdev_err(enic->netdev, "WQ[%d] error_status %d\n",
 418                                 i, error_status);
 419         }
 420
 421         for (i = 0; i < enic->rq_count; i++) {
 422                 error_status = vnic_rq_error_status(&enic->rq[i]);
 423                 if (error_status)
 424                         netdev_err(enic->netdev, "RQ[%d] error_status %d\n",
 425                                 i, error_status);
 426         }
 427 }
 428
 429 static void enic_msglvl_check(struct enic *enic)
 430 {
 431         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 432
 433         if (msg_enable != enic->msg_enable) {
 434                 netdev_info(enic->netdev, "msg lvl changed from 0x%x to 0x%x\n",
 435                         enic->msg_enable, msg_enable);
 436                 enic->msg_enable = msg_enable;
 437         }
 438 }
 439
 440 static void enic_mtu_check(struct enic *enic)
 441 {
 442         u32 mtu = vnic_dev_mtu(enic->vdev);
 443         struct net_device *netdev = enic->netdev;
 444
 445         if (mtu && mtu != enic->port_mtu) {
 446                 enic->port_mtu = mtu;
 447                 if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 448                         mtu = max_t(int, ENIC_MIN_MTU,
 449                                 min_t(int, ENIC_MAX_MTU, mtu));
 450                         if (mtu != netdev->mtu)
 451                                 schedule_work(&enic->change_mtu_work);
 452                 } else {
 453                         if (mtu < netdev->mtu)
 454                                 netdev_warn(netdev,
 455                                         "interface MTU (%d) set higher "
 456                                         "than switch port MTU (%d)\n",
 457                                         netdev->mtu, mtu);
 458                 }
 459         }
 460 }
 461
 462 static void enic_link_check(struct enic *enic)
 463 {
 464         int link_status = vnic_dev_link_status(enic->vdev);
 465         int carrier_ok = netif_carrier_ok(enic->netdev);
 466
 467         if (link_status && !carrier_ok) {
 468                 netdev_info(enic->netdev, "Link UP\n");
 469                 netif_carrier_on(enic->netdev);
 470         } else if (!link_status && carrier_ok) {
 471                 netdev_info(enic->netdev, "Link DOWN\n");
 472                 netif_carrier_off(enic->netdev);
 473         }
 474 }
 475
 476 static void enic_notify_check(struct enic *enic)
 477 {
 478         enic_msglvl_check(enic);
 479         enic_mtu_check(enic);
 480         enic_link_check(enic);
 481 }
 482
 483 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 484
 485 static irqreturn_t enic_isr_legacy(int irq, void *data)
 486 {
 487         struct net_device *netdev = data;
 488         struct enic *enic = netdev_priv(netdev);
 489         unsigned int io_intr = enic_legacy_io_intr();
 490         unsigned int err_intr = enic_legacy_err_intr();
 491         unsigned int notify_intr = enic_legacy_notify_intr();
 492         u32 pba;
 493
 494         vnic_intr_mask(&enic->intr[io_intr]);
 495
 496         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 497         if (!pba) {
 498                 vnic_intr_unmask(&enic->intr[io_intr]);
 499                 return IRQ_NONE;        /* not our interrupt */
 500         }
 501
 502         if (ENIC_TEST_INTR(pba, notify_intr)) {
 503                 vnic_intr_return_all_credits(&enic->intr[notify_intr]);
 504                 enic_notify_check(enic);
 505         }
 506
 507         if (ENIC_TEST_INTR(pba, err_intr)) {
 508                 vnic_intr_return_all_credits(&enic->intr[err_intr]);
 509                 enic_log_q_error(enic);
 510                 /* schedule recovery from WQ/RQ error */
 511                 schedule_work(&enic->reset);
 512                 return IRQ_HANDLED;
 513         }
 514
 515         if (ENIC_TEST_INTR(pba, io_intr)) {
 516                 if (napi_schedule_prep(&enic->napi[0]))
 517                         __napi_schedule(&enic->napi[0]);
 518         } else {
 519                 vnic_intr_unmask(&enic->intr[io_intr]);
 520         }
 521
 522         return IRQ_HANDLED;
 523 }
 524
 525 static irqreturn_t enic_isr_msi(int irq, void *data)
 526 {
 527         struct enic *enic = data;
 528
 529         /* With MSI, there is no sharing of interrupts, so this is
 530          * our interrupt and there is no need to ack it.  The device
 531          * is not providing per-vector masking, so the OS will not
 532          * write to PCI config space to mask/unmask the interrupt.
 533          * We're using mask_on_assertion for MSI, so the device
 534          * automatically masks the interrupt when the interrupt is
 535          * generated.  Later, when exiting polling, the interrupt
 536          * will be unmasked (see enic_poll).
 537          *
 538          * Also, the device uses the same PCIe Traffic Class (TC)
 539          * for Memory Write data and MSI, so there are no ordering
 540          * issues; the MSI will always arrive at the Root Complex
 541          * _after_ corresponding Memory Writes (i.e. descriptor
 542          * writes).
 543          */
 544
 545         napi_schedule(&enic->napi[0]);
 546
 547         return IRQ_HANDLED;
 548 }
 549
 550 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 551 {
 552         struct napi_struct *napi = data;
 553
 554         /* schedule NAPI polling for RQ cleanup */
 555         napi_schedule(napi);
 556
 557         return IRQ_HANDLED;
 558 }
 559
 560 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 561 {
 562         struct enic *enic = data;
 563         unsigned int cq = enic_cq_wq(enic, 0);
 564         unsigned int intr = enic_msix_wq_intr(enic, 0);
 565         unsigned int wq_work_to_do = -1; /* no limit */
 566         unsigned int wq_work_done;
 567
 568         wq_work_done = vnic_cq_service(&enic->cq[cq],
 569                 wq_work_to_do, enic_wq_service, NULL);
 570
 571         vnic_intr_return_credits(&enic->intr[intr],
 572                 wq_work_done,
 573                 1 /* unmask intr */,
 574                 1 /* reset intr timer */);
 575
 576         return IRQ_HANDLED;
 577 }
 578
 579 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 580 {
 581         struct enic *enic = data;
 582         unsigned int intr = enic_msix_err_intr(enic);
 583
 584         vnic_intr_return_all_credits(&enic->intr[intr]);
 585
 586         enic_log_q_error(enic);
 587
 588         /* schedule recovery from WQ/RQ error */
 589         schedule_work(&enic->reset);
 590
 591         return IRQ_HANDLED;
 592 }
 593
 594 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 595 {
 596         struct enic *enic = data;
 597         unsigned int intr = enic_msix_notify_intr(enic);
 598
 599         vnic_intr_return_all_credits(&enic->intr[intr]);
 600         enic_notify_check(enic);
 601
 602         return IRQ_HANDLED;
 603 }
 604
 605 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 606         struct vnic_wq *wq, struct sk_buff *skb,
 607         unsigned int len_left, int loopback)
 608 {
 609         const skb_frag_t *frag;
 610
 611         /* Queue additional data fragments */
 612         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 613                 len_left -= skb_frag_size(frag);
 614                 enic_queue_wq_desc_cont(wq, skb,
 615                         skb_frag_dma_map(&enic->pdev->dev,
 616                                          frag, 0, skb_frag_size(frag),
 617                                          DMA_TO_DEVICE),
 618                         skb_frag_size(frag),
 619                         (len_left == 0),        /* EOP? */
 620                         loopback);
 621         }
 622 }
 623
 624 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 625         struct vnic_wq *wq, struct sk_buff *skb,
 626         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 627 {
 628         unsigned int head_len = skb_headlen(skb);
 629         unsigned int len_left = skb->len - head_len;
 630         int eop = (len_left == 0);
 631
 632         /* Queue the main skb fragment. The fragments are no larger
 633          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 634          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 635          * per fragment is queued.
 636          */
 637         enic_queue_wq_desc(wq, skb,
 638                 pci_map_single(enic->pdev, skb->data,
 639                         head_len, PCI_DMA_TODEVICE),
 640                 head_len,
 641                 vlan_tag_insert, vlan_tag,
 642                 eop, loopback);
 643
 644         if (!eop)
 645                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 646 }
 647
 648 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 649         struct vnic_wq *wq, struct sk_buff *skb,
 650         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 651 {
 652         unsigned int head_len = skb_headlen(skb);
 653         unsigned int len_left = skb->len - head_len;
 654         unsigned int hdr_len = skb_checksum_start_offset(skb);
 655         unsigned int csum_offset = hdr_len + skb->csum_offset;
 656         int eop = (len_left == 0);
 657
 658         /* Queue the main skb fragment. The fragments are no larger
 659          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 660          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 661          * per fragment is queued.
 662          */
 663         enic_queue_wq_desc_csum_l4(wq, skb,
 664                 pci_map_single(enic->pdev, skb->data,
 665                         head_len, PCI_DMA_TODEVICE),
 666                 head_len,
 667                 csum_offset,
 668                 hdr_len,
 669                 vlan_tag_insert, vlan_tag,
 670                 eop, loopback);
 671
 672         if (!eop)
 673                 enic_queue_wq_skb_cont(enic, wq, skb, len_left, loopback);
 674 }
 675
 676 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 677         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 678         int vlan_tag_insert, unsigned int vlan_tag, int loopback)
 679 {
 680         unsigned int frag_len_left = skb_headlen(skb);
 681         unsigned int len_left = skb->len - frag_len_left;
 682         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 683         int eop = (len_left == 0);
 684         unsigned int len;
 685         dma_addr_t dma_addr;
 686         unsigned int offset = 0;
 687         skb_frag_t *frag;
 688
 689         /* Preload TCP csum field with IP pseudo hdr calculated
 690          * with IP length set to zero.  HW will later add in length
 691          * to each TCP segment resulting from the TSO.
 692          */
 693
 694         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 695                 ip_hdr(skb)->check = 0;
 696                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 697                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 698         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 699                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 700                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 701         }
 702
 703         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 704          * for the main skb fragment
 705          */
 706         while (frag_len_left) {
 707                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 708                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 709                                 len, PCI_DMA_TODEVICE);
 710                 enic_queue_wq_desc_tso(wq, skb,
 711                         dma_addr,
 712                         len,
 713                         mss, hdr_len,
 714                         vlan_tag_insert, vlan_tag,
 715                         eop && (len == frag_len_left), loopback);
 716                 frag_len_left -= len;
 717                 offset += len;
 718         }
 719
 720         if (eop)
 721                 return;
 722
 723         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 724          * for additional data fragments
 725          */
 726         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 727                 len_left -= skb_frag_size(frag);
 728                 frag_len_left = skb_frag_size(frag);
 729                 offset = 0;
 730
 731                 while (frag_len_left) {
 732                         len = min(frag_len_left,
 733                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 734                         dma_addr = skb_frag_dma_map(&enic->pdev->dev, frag,
 735                                                     offset, len,
 736                                                     DMA_TO_DEVICE);
 737                         enic_queue_wq_desc_cont(wq, skb,
 738                                 dma_addr,
 739                                 len,
 740                                 (len_left == 0) &&
 741                                 (len == frag_len_left),         /* EOP? */
 742                                 loopback);
 743                         frag_len_left -= len;
 744                         offset += len;
 745                 }
 746         }
 747 }
 748
 749 static inline void enic_queue_wq_skb(struct enic *enic,
 750         struct vnic_wq *wq, struct sk_buff *skb)
 751 {
 752         unsigned int mss = skb_shinfo(skb)->gso_size;
 753         unsigned int vlan_tag = 0;
 754         int vlan_tag_insert = 0;
 755         int loopback = 0;
 756
 757         if (vlan_tx_tag_present(skb)) {
 758                 /* VLAN tag from trunking driver */
 759                 vlan_tag_insert = 1;
 760                 vlan_tag = vlan_tx_tag_get(skb);
 761         } else if (enic->loop_enable) {
 762                 vlan_tag = enic->loop_tag;
 763                 loopback = 1;
 764         }
 765
 766         if (mss)
 767                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 768                         vlan_tag_insert, vlan_tag, loopback);
 769         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 770                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 771                         vlan_tag_insert, vlan_tag, loopback);
 772         else
 773                 enic_queue_wq_skb_vlan(enic, wq, skb,
 774                         vlan_tag_insert, vlan_tag, loopback);
 775 }
 776
 777 /* netif_tx_lock held, process context with BHs disabled, or BH */
 778 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 779         struct net_device *netdev)
 780 {
 781         struct enic *enic = netdev_priv(netdev);
 782         struct vnic_wq *wq = &enic->wq[0];
 783         unsigned long flags;
 784
 785         if (skb->len <= 0) {
 786                 dev_kfree_skb(skb);
 787                 return NETDEV_TX_OK;
 788         }
 789
 790         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 791          * which is very likely.  In the off chance it's going to take
 792          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 793          */
 794
 795         if (skb_shinfo(skb)->gso_size == 0 &&
 796             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 797             skb_linearize(skb)) {
 798                 dev_kfree_skb(skb);
 799                 return NETDEV_TX_OK;
 800         }
 801
 802         spin_lock_irqsave(&enic->wq_lock[0], flags);
 803
 804         if (vnic_wq_desc_avail(wq) <
 805             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 806                 netif_stop_queue(netdev);
 807                 /* This is a hard error, log it */
 808                 netdev_err(netdev, "BUG! Tx ring full when queue awake!\n");
 809                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 810                 return NETDEV_TX_BUSY;
 811         }
 812
 813         enic_queue_wq_skb(enic, wq, skb);
 814
 815         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 816                 netif_stop_queue(netdev);
 817
 818         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 819
 820         return NETDEV_TX_OK;
 821 }
 822
 823 /* dev_base_lock rwlock held, nominally process context */
 824 static struct rtnl_link_stats64 *enic_get_stats(struct net_device *netdev,
 825                                                 struct rtnl_link_stats64 *net_stats)
 826 {
 827         struct enic *enic = netdev_priv(netdev);
 828         struct vnic_stats *stats;
 829
 830         enic_dev_stats_dump(enic, &stats);
 831
 832         net_stats->tx_packets = stats->tx.tx_frames_ok;
 833         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 834         net_stats->tx_errors = stats->tx.tx_errors;
 835         net_stats->tx_dropped = stats->tx.tx_drops;
 836
 837         net_stats->rx_packets = stats->rx.rx_frames_ok;
 838         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 839         net_stats->rx_errors = stats->rx.rx_errors;
 840         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 841         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 842         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 843         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 844
 845         return net_stats;
 846 }
 847
 848 void enic_reset_addr_lists(struct enic *enic)
 849 {
 850         enic->mc_count = 0;
 851         enic->uc_count = 0;
 852         enic->flags = 0;
 853 }
 854
 855 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 856 {
 857         struct enic *enic = netdev_priv(netdev);
 858
 859         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic)) {
 860                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 861                         return -EADDRNOTAVAIL;
 862         } else {
 863                 if (!is_valid_ether_addr(addr))
 864                         return -EADDRNOTAVAIL;
 865         }
 866
 867         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 868
 869         return 0;
 870 }
 871
 872 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 873 {
 874         struct enic *enic = netdev_priv(netdev);
 875         struct sockaddr *saddr = p;
 876         char *addr = saddr->sa_data;
 877         int err;
 878
 879         if (netif_running(enic->netdev)) {
 880                 err = enic_dev_del_station_addr(enic);
 881                 if (err)
 882                         return err;
 883         }
 884
 885         err = enic_set_mac_addr(netdev, addr);
 886         if (err)
 887                 return err;
 888
 889         if (netif_running(enic->netdev)) {
 890                 err = enic_dev_add_station_addr(enic);
 891                 if (err)
 892                         return err;
 893         }
 894
 895         return err;
 896 }
 897
 898 static int enic_set_mac_address(struct net_device *netdev, void *p)
 899 {
 900         struct sockaddr *saddr = p;
 901         char *addr = saddr->sa_data;
 902         struct enic *enic = netdev_priv(netdev);
 903         int err;
 904
 905         err = enic_dev_del_station_addr(enic);
 906         if (err)
 907                 return err;
 908
 909         err = enic_set_mac_addr(netdev, addr);
 910         if (err)
 911                 return err;
 912
 913         return enic_dev_add_station_addr(enic);
 914 }
 915
 916 static void enic_update_multicast_addr_list(struct enic *enic)
 917 {
 918         struct net_device *netdev = enic->netdev;
 919         struct netdev_hw_addr *ha;
 920         unsigned int mc_count = netdev_mc_count(netdev);
 921         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 922         unsigned int i, j;
 923
 924         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS) {
 925                 netdev_warn(netdev, "Registering only %d out of %d "
 926                         "multicast addresses\n",
 927                         ENIC_MULTICAST_PERFECT_FILTERS, mc_count);
 928                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 929         }
 930
 931         /* Is there an easier way?  Trying to minimize to
 932          * calls to add/del multicast addrs.  We keep the
 933          * addrs from the last call in enic->mc_addr and
 934          * look for changes to add/del.
 935          */
 936
 937         i = 0;
 938         netdev_for_each_mc_addr(ha, netdev) {
 939                 if (i == mc_count)
 940                         break;
 941                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 942         }
 943
 944         for (i = 0; i < enic->mc_count; i++) {
 945                 for (j = 0; j < mc_count; j++)
 946                         if (ether_addr_equal(enic->mc_addr[i], mc_addr[j]))
 947                                 break;
 948                 if (j == mc_count)
 949                         enic_dev_del_addr(enic, enic->mc_addr[i]);
 950         }
 951
 952         for (i = 0; i < mc_count; i++) {
 953                 for (j = 0; j < enic->mc_count; j++)
 954                         if (ether_addr_equal(mc_addr[i], enic->mc_addr[j]))
 955                                 break;
 956                 if (j == enic->mc_count)
 957                         enic_dev_add_addr(enic, mc_addr[i]);
 958         }
 959
 960         /* Save the list to compare against next time
 961          */
 962
 963         for (i = 0; i < mc_count; i++)
 964                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 965
 966         enic->mc_count = mc_count;
 967 }
 968
 969 static void enic_update_unicast_addr_list(struct enic *enic)
 970 {
 971         struct net_device *netdev = enic->netdev;
 972         struct netdev_hw_addr *ha;
 973         unsigned int uc_count = netdev_uc_count(netdev);
 974         u8 uc_addr[ENIC_UNICAST_PERFECT_FILTERS][ETH_ALEN];
 975         unsigned int i, j;
 976
 977         if (uc_count > ENIC_UNICAST_PERFECT_FILTERS) {
 978                 netdev_warn(netdev, "Registering only %d out of %d "
 979                         "unicast addresses\n",
 980                         ENIC_UNICAST_PERFECT_FILTERS, uc_count);
 981                 uc_count = ENIC_UNICAST_PERFECT_FILTERS;
 982         }
 983
 984         /* Is there an easier way?  Trying to minimize to
 985          * calls to add/del unicast addrs.  We keep the
 986          * addrs from the last call in enic->uc_addr and
 987          * look for changes to add/del.
 988          */
 989
 990         i = 0;
 991         netdev_for_each_uc_addr(ha, netdev) {
 992                 if (i == uc_count)
 993                         break;
 994                 memcpy(uc_addr[i++], ha->addr, ETH_ALEN);
 995         }
 996
 997         for (i = 0; i < enic->uc_count; i++) {
 998                 for (j = 0; j < uc_count; j++)
 999                         if (ether_addr_equal(enic->uc_addr[i], uc_addr[j]))
1000                                 break;
1001                 if (j == uc_count)
1002                         enic_dev_del_addr(enic, enic->uc_addr[i]);
1003         }
1004
1005         for (i = 0; i < uc_count; i++) {
1006                 for (j = 0; j < enic->uc_count; j++)
1007                         if (ether_addr_equal(uc_addr[i], enic->uc_addr[j]))
1008                                 break;
1009                 if (j == enic->uc_count)
1010                         enic_dev_add_addr(enic, uc_addr[i]);
1011         }
1012
1013         /* Save the list to compare against next time
1014          */
1015
1016         for (i = 0; i < uc_count; i++)
1017                 memcpy(enic->uc_addr[i], uc_addr[i], ETH_ALEN);
1018
1019         enic->uc_count = uc_count;
1020 }
1021
1022 /* netif_tx_lock held, BHs disabled */
1023 static void enic_set_rx_mode(struct net_device *netdev)
1024 {
1025         struct enic *enic = netdev_priv(netdev);
1026         int directed = 1;
1027         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
1028         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
1029         int promisc = (netdev->flags & IFF_PROMISC) ||
1030                 netdev_uc_count(netdev) > ENIC_UNICAST_PERFECT_FILTERS;
1031         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
1032                 netdev_mc_count(netdev) > ENIC_MULTICAST_PERFECT_FILTERS;
1033         unsigned int flags = netdev->flags |
1034                 (allmulti ? IFF_ALLMULTI : 0) |
1035                 (promisc ? IFF_PROMISC : 0);
1036
1037         if (enic->flags != flags) {
1038                 enic->flags = flags;
1039                 enic_dev_packet_filter(enic, directed,
1040                         multicast, broadcast, promisc, allmulti);
1041         }
1042
1043         if (!promisc) {
1044                 enic_update_unicast_addr_list(enic);
1045                 if (!allmulti)
1046                         enic_update_multicast_addr_list(enic);
1047         }
1048 }
1049
1050 /* netif_tx_lock held, BHs disabled */
1051 static void enic_tx_timeout(struct net_device *netdev)
1052 {
1053         struct enic *enic = netdev_priv(netdev);
1054         schedule_work(&enic->reset);
1055 }
1056
1057 static int enic_set_vf_mac(struct net_device *netdev, int vf, u8 *mac)
1058 {
1059         struct enic *enic = netdev_priv(netdev);
1060         struct enic_port_profile *pp;
1061         int err;
1062
1063         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1064         if (err)
1065                 return err;
1066
1067         if (is_valid_ether_addr(mac) || is_zero_ether_addr(mac)) {
1068                 if (vf == PORT_SELF_VF) {
1069                         memcpy(pp->vf_mac, mac, ETH_ALEN);
1070                         return 0;
1071                 } else {
1072                         /*
1073                          * For sriov vf's set the mac in hw
1074                          */
1075                         ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1076                                 vnic_dev_set_mac_addr, mac);
1077                         return enic_dev_status_to_errno(err);
1078                 }
1079         } else
1080                 return -EINVAL;
1081 }
1082
1083 static int enic_set_vf_port(struct net_device *netdev, int vf,
1084         struct nlattr *port[])
1085 {
1086         struct enic *enic = netdev_priv(netdev);
1087         struct enic_port_profile prev_pp;
1088         struct enic_port_profile *pp;
1089         int err = 0, restore_pp = 1;
1090
1091         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1092         if (err)
1093                 return err;
1094
1095         if (!port[IFLA_PORT_REQUEST])
1096                 return -EOPNOTSUPP;
1097
1098         memcpy(&prev_pp, pp, sizeof(*enic->pp));
1099         memset(pp, 0, sizeof(*enic->pp));
1100
1101         pp->set |= ENIC_SET_REQUEST;
1102         pp->request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1103
1104         if (port[IFLA_PORT_PROFILE]) {
1105                 pp->set |= ENIC_SET_NAME;
1106                 memcpy(pp->name, nla_data(port[IFLA_PORT_PROFILE]),
1107                         PORT_PROFILE_MAX);
1108         }
1109
1110         if (port[IFLA_PORT_INSTANCE_UUID]) {
1111                 pp->set |= ENIC_SET_INSTANCE;
1112                 memcpy(pp->instance_uuid,
1113                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1114         }
1115
1116         if (port[IFLA_PORT_HOST_UUID]) {
1117                 pp->set |= ENIC_SET_HOST;
1118                 memcpy(pp->host_uuid,
1119                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1120         }
1121
1122         if (vf == PORT_SELF_VF) {
1123                 /* Special case handling: mac came from IFLA_VF_MAC */
1124                 if (!is_zero_ether_addr(prev_pp.vf_mac))
1125                         memcpy(pp->mac_addr, prev_pp.vf_mac, ETH_ALEN);
1126
1127                 if (is_zero_ether_addr(netdev->dev_addr))
1128                         eth_hw_addr_random(netdev);
1129         } else {
1130                 /* SR-IOV VF: get mac from adapter */
1131                 ENIC_DEVCMD_PROXY_BY_INDEX(vf, err, enic,
1132                         vnic_dev_get_mac_addr, pp->mac_addr);
1133                 if (err) {
1134                         netdev_err(netdev, "Error getting mac for vf %d\n", vf);
1135                         memcpy(pp, &prev_pp, sizeof(*pp));
1136                         return enic_dev_status_to_errno(err);
1137                 }
1138         }
1139
1140         err = enic_process_set_pp_request(enic, vf, &prev_pp, &restore_pp);
1141         if (err) {
1142                 if (restore_pp) {
1143                         /* Things are still the way they were: Implicit
1144                          * DISASSOCIATE failed
1145                          */
1146                         memcpy(pp, &prev_pp, sizeof(*pp));
1147                 } else {
1148                         memset(pp, 0, sizeof(*pp));
1149                         if (vf == PORT_SELF_VF)
1150                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1151                 }
1152         } else {
1153                 /* Set flag to indicate that the port assoc/disassoc
1154                  * request has been sent out to fw
1155                  */
1156                 pp->set |= ENIC_PORT_REQUEST_APPLIED;
1157
1158                 /* If DISASSOCIATE, clean up all assigned/saved macaddresses */
1159                 if (pp->request == PORT_REQUEST_DISASSOCIATE) {
1160                         memset(pp->mac_addr, 0, ETH_ALEN);
1161                         if (vf == PORT_SELF_VF)
1162                                 memset(netdev->dev_addr, 0, ETH_ALEN);
1163                 }
1164         }
1165
1166         if (vf == PORT_SELF_VF)
1167                 memset(pp->vf_mac, 0, ETH_ALEN);
1168
1169         return err;
1170 }
1171
1172 static int enic_get_vf_port(struct net_device *netdev, int vf,
1173         struct sk_buff *skb)
1174 {
1175         struct enic *enic = netdev_priv(netdev);
1176         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1177         struct enic_port_profile *pp;
1178         int err;
1179
1180         ENIC_PP_BY_INDEX(enic, vf, pp, &err);
1181         if (err)
1182                 return err;
1183
1184         if (!(pp->set & ENIC_PORT_REQUEST_APPLIED))
1185                 return -ENODATA;
1186
1187         err = enic_process_get_pp_request(enic, vf, pp->request, &response);
1188         if (err)
1189                 return err;
1190
1191         if (nla_put_u16(skb, IFLA_PORT_REQUEST, pp->request) ||
1192             nla_put_u16(skb, IFLA_PORT_RESPONSE, response) ||
1193             ((pp->set & ENIC_SET_NAME) &&
1194              nla_put(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX, pp->name)) ||
1195             ((pp->set & ENIC_SET_INSTANCE) &&
1196              nla_put(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1197                      pp->instance_uuid)) ||
1198             ((pp->set & ENIC_SET_HOST) &&
1199              nla_put(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX, pp->host_uuid)))
1200                 goto nla_put_failure;
1201         return 0;
1202
1203 nla_put_failure:
1204         return -EMSGSIZE;
1205 }
1206
1207 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1208 {
1209         struct enic *enic = vnic_dev_priv(rq->vdev);
1210
1211         if (!buf->os_buf)
1212                 return;
1213
1214         pci_unmap_single(enic->pdev, buf->dma_addr,
1215                 buf->len, PCI_DMA_FROMDEVICE);
1216         dev_kfree_skb_any(buf->os_buf);
1217 }
1218
1219 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1220 {
1221         struct enic *enic = vnic_dev_priv(rq->vdev);
1222         struct net_device *netdev = enic->netdev;
1223         struct sk_buff *skb;
1224         unsigned int len = netdev->mtu + VLAN_ETH_HLEN;
1225         unsigned int os_buf_index = 0;
1226         dma_addr_t dma_addr;
1227
1228         skb = netdev_alloc_skb_ip_align(netdev, len);
1229         if (!skb)
1230                 return -ENOMEM;
1231
1232         dma_addr = pci_map_single(enic->pdev, skb->data,
1233                 len, PCI_DMA_FROMDEVICE);
1234
1235         enic_queue_rq_desc(rq, skb, os_buf_index,
1236                 dma_addr, len);
1237
1238         return 0;
1239 }
1240
1241 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1242         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1243         int skipped, void *opaque)
1244 {
1245         struct enic *enic = vnic_dev_priv(rq->vdev);
1246         struct net_device *netdev = enic->netdev;
1247         struct sk_buff *skb;
1248
1249         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1250         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1251         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1252         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1253         u8 packet_error;
1254         u16 q_number, completed_index, bytes_written, vlan_tci, checksum;
1255         u32 rss_hash;
1256
1257         if (skipped)
1258                 return;
1259
1260         skb = buf->os_buf;
1261         prefetch(skb->data - NET_IP_ALIGN);
1262         pci_unmap_single(enic->pdev, buf->dma_addr,
1263                 buf->len, PCI_DMA_FROMDEVICE);
1264
1265         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1266                 &type, &color, &q_number, &completed_index,
1267                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1268                 &csum_not_calc, &rss_hash, &bytes_written,
1269                 &packet_error, &vlan_stripped, &vlan_tci, &checksum,
1270                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1271                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1272                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1273                 &fcs_ok);
1274
1275         if (packet_error) {
1276
1277                 if (!fcs_ok) {
1278                         if (bytes_written > 0)
1279                                 enic->rq_bad_fcs++;
1280                         else if (bytes_written == 0)
1281                                 enic->rq_truncated_pkts++;
1282                 }
1283
1284                 dev_kfree_skb_any(skb);
1285
1286                 return;
1287         }
1288
1289         if (eop && bytes_written > 0) {
1290
1291                 /* Good receive
1292                  */
1293
1294                 skb_put(skb, bytes_written);
1295                 skb->protocol = eth_type_trans(skb, netdev);
1296
1297                 if ((netdev->features & NETIF_F_RXCSUM) && !csum_not_calc) {
1298                         skb->csum = htons(checksum);
1299                         skb->ip_summed = CHECKSUM_COMPLETE;
1300                 }
1301
1302                 if (vlan_stripped)
1303                         __vlan_hwaccel_put_tag(skb, vlan_tci);
1304
1305                 if (netdev->features & NETIF_F_GRO)
1306                         napi_gro_receive(&enic->napi[q_number], skb);
1307                 else
1308                         netif_receive_skb(skb);
1309         } else {
1310
1311                 /* Buffer overflow
1312                  */
1313
1314                 dev_kfree_skb_any(skb);
1315         }
1316 }
1317
1318 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1319         u8 type, u16 q_number, u16 completed_index, void *opaque)
1320 {
1321         struct enic *enic = vnic_dev_priv(vdev);
1322
1323         vnic_rq_service(&enic->rq[q_number], cq_desc,
1324                 completed_index, VNIC_RQ_RETURN_DESC,
1325                 enic_rq_indicate_buf, opaque);
1326
1327         return 0;
1328 }
1329
1330 static int enic_poll(struct napi_struct *napi, int budget)
1331 {
1332         struct net_device *netdev = napi->dev;
1333         struct enic *enic = netdev_priv(netdev);
1334         unsigned int cq_rq = enic_cq_rq(enic, 0);
1335         unsigned int cq_wq = enic_cq_wq(enic, 0);
1336         unsigned int intr = enic_legacy_io_intr();
1337         unsigned int rq_work_to_do = budget;
1338         unsigned int wq_work_to_do = -1; /* no limit */
1339         unsigned int  work_done, rq_work_done, wq_work_done;
1340         int err;
1341
1342         /* Service RQ (first) and WQ
1343          */
1344
1345         rq_work_done = vnic_cq_service(&enic->cq[cq_rq],
1346                 rq_work_to_do, enic_rq_service, NULL);
1347
1348         wq_work_done = vnic_cq_service(&enic->cq[cq_wq],
1349                 wq_work_to_do, enic_wq_service, NULL);
1350
1351         /* Accumulate intr event credits for this polling
1352          * cycle.  An intr event is the completion of a
1353          * a WQ or RQ packet.
1354          */
1355
1356         work_done = rq_work_done + wq_work_done;
1357
1358         if (work_done > 0)
1359                 vnic_intr_return_credits(&enic->intr[intr],
1360                         work_done,
1361                         0 /* don't unmask intr */,
1362                         0 /* don't reset intr timer */);
1363
1364         err = vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1365
1366         /* Buffer allocation failed. Stay in polling
1367          * mode so we can try to fill the ring again.
1368          */
1369
1370         if (err)
1371                 rq_work_done = rq_work_to_do;
1372
1373         if (rq_work_done < rq_work_to_do) {
1374
1375                 /* Some work done, but not enough to stay in polling,
1376                  * exit polling
1377                  */
1378
1379                 napi_complete(napi);
1380                 vnic_intr_unmask(&enic->intr[intr]);
1381         }
1382
1383         return rq_work_done;
1384 }
1385
1386 static int enic_poll_msix(struct napi_struct *napi, int budget)
1387 {
1388         struct net_device *netdev = napi->dev;
1389         struct enic *enic = netdev_priv(netdev);
1390         unsigned int rq = (napi - &enic->napi[0]);
1391         unsigned int cq = enic_cq_rq(enic, rq);
1392         unsigned int intr = enic_msix_rq_intr(enic, rq);
1393         unsigned int work_to_do = budget;
1394         unsigned int work_done;
1395         int err;
1396
1397         /* Service RQ
1398          */
1399
1400         work_done = vnic_cq_service(&enic->cq[cq],
1401                 work_to_do, enic_rq_service, NULL);
1402
1403         /* Return intr event credits for this polling
1404          * cycle.  An intr event is the completion of a
1405          * RQ packet.
1406          */
1407
1408         if (work_done > 0)
1409                 vnic_intr_return_credits(&enic->intr[intr],
1410                         work_done,
1411                         0 /* don't unmask intr */,
1412                         0 /* don't reset intr timer */);
1413
1414         err = vnic_rq_fill(&enic->rq[rq], enic_rq_alloc_buf);
1415
1416         /* Buffer allocation failed. Stay in polling mode
1417          * so we can try to fill the ring again.
1418          */
1419
1420         if (err)
1421                 work_done = work_to_do;
1422
1423         if (work_done < work_to_do) {
1424
1425                 /* Some work done, but not enough to stay in polling,
1426                  * exit polling
1427                  */
1428
1429                 napi_complete(napi);
1430                 vnic_intr_unmask(&enic->intr[intr]);
1431         }
1432
1433         return work_done;
1434 }
1435
1436 static void enic_notify_timer(unsigned long data)
1437 {
1438         struct enic *enic = (struct enic *)data;
1439
1440         enic_notify_check(enic);
1441
1442         mod_timer(&enic->notify_timer,
1443                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1444 }
1445
1446 static void enic_free_intr(struct enic *enic)
1447 {
1448         struct net_device *netdev = enic->netdev;
1449         unsigned int i;
1450
1451         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1452         case VNIC_DEV_INTR_MODE_INTX:
1453                 free_irq(enic->pdev->irq, netdev);
1454                 break;
1455         case VNIC_DEV_INTR_MODE_MSI:
1456                 free_irq(enic->pdev->irq, enic);
1457                 break;
1458         case VNIC_DEV_INTR_MODE_MSIX:
1459                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1460                         if (enic->msix[i].requested)
1461                                 free_irq(enic->msix_entry[i].vector,
1462                                         enic->msix[i].devid);
1463                 break;
1464         default:
1465                 break;
1466         }
1467 }
1468
1469 static int enic_request_intr(struct enic *enic)
1470 {
1471         struct net_device *netdev = enic->netdev;
1472         unsigned int i, intr;
1473         int err = 0;
1474
1475         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1476
1477         case VNIC_DEV_INTR_MODE_INTX:
1478
1479                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1480                         IRQF_SHARED, netdev->name, netdev);
1481                 break;
1482
1483         case VNIC_DEV_INTR_MODE_MSI:
1484
1485                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1486                         0, netdev->name, enic);
1487                 break;
1488
1489         case VNIC_DEV_INTR_MODE_MSIX:
1490
1491                 for (i = 0; i < enic->rq_count; i++) {
1492                         intr = enic_msix_rq_intr(enic, i);
1493                         snprintf(enic->msix[intr].devname,
1494                                 sizeof(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                         snprintf(enic->msix[intr].devname,
1503                                 sizeof(enic->msix[intr].devname),
1504                                 "%.11s-tx-%d", netdev->name, i);
1505                         enic->msix[intr].isr = enic_isr_msix_wq;
1506                         enic->msix[intr].devid = enic;
1507                 }
1508
1509                 intr = enic_msix_err_intr(enic);
1510                 snprintf(enic->msix[intr].devname,
1511                         sizeof(enic->msix[intr].devname),
1512                         "%.11s-err", netdev->name);
1513                 enic->msix[intr].isr = enic_isr_msix_err;
1514                 enic->msix[intr].devid = enic;
1515
1516                 intr = enic_msix_notify_intr(enic);
1517                 snprintf(enic->msix[intr].devname,
1518                         sizeof(enic->msix[intr].devname),
1519                         "%.11s-notify", netdev->name);
1520                 enic->msix[intr].isr = enic_isr_msix_notify;
1521                 enic->msix[intr].devid = enic;
1522
1523                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1524                         enic->msix[i].requested = 0;
1525
1526                 for (i = 0; i < enic->intr_count; i++) {
1527                         err = request_irq(enic->msix_entry[i].vector,
1528                                 enic->msix[i].isr, 0,
1529                                 enic->msix[i].devname,
1530                                 enic->msix[i].devid);
1531                         if (err) {
1532                                 enic_free_intr(enic);
1533                                 break;
1534                         }
1535                         enic->msix[i].requested = 1;
1536                 }
1537
1538                 break;
1539
1540         default:
1541                 break;
1542         }
1543
1544         return err;
1545 }
1546
1547 static void enic_synchronize_irqs(struct enic *enic)
1548 {
1549         unsigned int i;
1550
1551         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1552         case VNIC_DEV_INTR_MODE_INTX:
1553         case VNIC_DEV_INTR_MODE_MSI:
1554                 synchronize_irq(enic->pdev->irq);
1555                 break;
1556         case VNIC_DEV_INTR_MODE_MSIX:
1557                 for (i = 0; i < enic->intr_count; i++)
1558                         synchronize_irq(enic->msix_entry[i].vector);
1559                 break;
1560         default:
1561                 break;
1562         }
1563 }
1564
1565 static int enic_dev_notify_set(struct enic *enic)
1566 {
1567         int err;
1568
1569         spin_lock(&enic->devcmd_lock);
1570         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1571         case VNIC_DEV_INTR_MODE_INTX:
1572                 err = vnic_dev_notify_set(enic->vdev,
1573                         enic_legacy_notify_intr());
1574                 break;
1575         case VNIC_DEV_INTR_MODE_MSIX:
1576                 err = vnic_dev_notify_set(enic->vdev,
1577                         enic_msix_notify_intr(enic));
1578                 break;
1579         default:
1580                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1581                 break;
1582         }
1583         spin_unlock(&enic->devcmd_lock);
1584
1585         return err;
1586 }
1587
1588 static void enic_notify_timer_start(struct enic *enic)
1589 {
1590         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1591         case VNIC_DEV_INTR_MODE_MSI:
1592                 mod_timer(&enic->notify_timer, jiffies);
1593                 break;
1594         default:
1595                 /* Using intr for notification for INTx/MSI-X */
1596                 break;
1597         }
1598 }
1599
1600 /* rtnl lock is held, process context */
1601 static int enic_open(struct net_device *netdev)
1602 {
1603         struct enic *enic = netdev_priv(netdev);
1604         unsigned int i;
1605         int err;
1606
1607         err = enic_request_intr(enic);
1608         if (err) {
1609                 netdev_err(netdev, "Unable to request irq.\n");
1610                 return err;
1611         }
1612
1613         err = enic_dev_notify_set(enic);
1614         if (err) {
1615                 netdev_err(netdev,
1616                         "Failed to alloc notify buffer, aborting.\n");
1617                 goto err_out_free_intr;
1618         }
1619
1620         for (i = 0; i < enic->rq_count; i++) {
1621                 vnic_rq_fill(&enic->rq[i], enic_rq_alloc_buf);
1622                 /* Need at least one buffer on ring to get going */
1623                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1624                         netdev_err(netdev, "Unable to alloc receive buffers\n");
1625                         err = -ENOMEM;
1626                         goto err_out_notify_unset;
1627                 }
1628         }
1629
1630         for (i = 0; i < enic->wq_count; i++)
1631                 vnic_wq_enable(&enic->wq[i]);
1632         for (i = 0; i < enic->rq_count; i++)
1633                 vnic_rq_enable(&enic->rq[i]);
1634
1635         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1636                 enic_dev_add_station_addr(enic);
1637
1638         enic_set_rx_mode(netdev);
1639
1640         netif_wake_queue(netdev);
1641
1642         for (i = 0; i < enic->rq_count; i++)
1643                 napi_enable(&enic->napi[i]);
1644
1645         enic_dev_enable(enic);
1646
1647         for (i = 0; i < enic->intr_count; i++)
1648                 vnic_intr_unmask(&enic->intr[i]);
1649
1650         enic_notify_timer_start(enic);
1651
1652         return 0;
1653
1654 err_out_notify_unset:
1655         enic_dev_notify_unset(enic);
1656 err_out_free_intr:
1657         enic_free_intr(enic);
1658
1659         return err;
1660 }
1661
1662 /* rtnl lock is held, process context */
1663 static int enic_stop(struct net_device *netdev)
1664 {
1665         struct enic *enic = netdev_priv(netdev);
1666         unsigned int i;
1667         int err;
1668
1669         for (i = 0; i < enic->intr_count; i++) {
1670                 vnic_intr_mask(&enic->intr[i]);
1671                 (void)vnic_intr_masked(&enic->intr[i]); /* flush write */
1672         }
1673
1674         enic_synchronize_irqs(enic);
1675
1676         del_timer_sync(&enic->notify_timer);
1677
1678         enic_dev_disable(enic);
1679
1680         for (i = 0; i < enic->rq_count; i++)
1681                 napi_disable(&enic->napi[i]);
1682
1683         netif_carrier_off(netdev);
1684         netif_tx_disable(netdev);
1685
1686         if (!enic_is_dynamic(enic) && !enic_is_sriov_vf(enic))
1687                 enic_dev_del_station_addr(enic);
1688
1689         for (i = 0; i < enic->wq_count; i++) {
1690                 err = vnic_wq_disable(&enic->wq[i]);
1691                 if (err)
1692                         return err;
1693         }
1694         for (i = 0; i < enic->rq_count; i++) {
1695                 err = vnic_rq_disable(&enic->rq[i]);
1696                 if (err)
1697                         return err;
1698         }
1699
1700         enic_dev_notify_unset(enic);
1701         enic_free_intr(enic);
1702
1703         for (i = 0; i < enic->wq_count; i++)
1704                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1705         for (i = 0; i < enic->rq_count; i++)
1706                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1707         for (i = 0; i < enic->cq_count; i++)
1708                 vnic_cq_clean(&enic->cq[i]);
1709         for (i = 0; i < enic->intr_count; i++)
1710                 vnic_intr_clean(&enic->intr[i]);
1711
1712         return 0;
1713 }
1714
1715 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1716 {
1717         struct enic *enic = netdev_priv(netdev);
1718         int running = netif_running(netdev);
1719
1720         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1721                 return -EINVAL;
1722
1723         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
1724                 return -EOPNOTSUPP;
1725
1726         if (running)
1727                 enic_stop(netdev);
1728
1729         netdev->mtu = new_mtu;
1730
1731         if (netdev->mtu > enic->port_mtu)
1732                 netdev_warn(netdev,
1733                         "interface MTU (%d) set higher than port MTU (%d)\n",
1734                         netdev->mtu, enic->port_mtu);
1735
1736         if (running)
1737                 enic_open(netdev);
1738
1739         return 0;
1740 }
1741
1742 static void enic_change_mtu_work(struct work_struct *work)
1743 {
1744         struct enic *enic = container_of(work, struct enic, change_mtu_work);
1745         struct net_device *netdev = enic->netdev;
1746         int new_mtu = vnic_dev_mtu(enic->vdev);
1747         int err;
1748         unsigned int i;
1749
1750         new_mtu = max_t(int, ENIC_MIN_MTU, min_t(int, ENIC_MAX_MTU, new_mtu));
1751
1752         rtnl_lock();
1753
1754         /* Stop RQ */
1755         del_timer_sync(&enic->notify_timer);
1756
1757         for (i = 0; i < enic->rq_count; i++)
1758                 napi_disable(&enic->napi[i]);
1759
1760         vnic_intr_mask(&enic->intr[0]);
1761         enic_synchronize_irqs(enic);
1762         err = vnic_rq_disable(&enic->rq[0]);
1763         if (err) {
1764                 netdev_err(netdev, "Unable to disable RQ.\n");
1765                 return;
1766         }
1767         vnic_rq_clean(&enic->rq[0], enic_free_rq_buf);
1768         vnic_cq_clean(&enic->cq[0]);
1769         vnic_intr_clean(&enic->intr[0]);
1770
1771         /* Fill RQ with new_mtu-sized buffers */
1772         netdev->mtu = new_mtu;
1773         vnic_rq_fill(&enic->rq[0], enic_rq_alloc_buf);
1774         /* Need at least one buffer on ring to get going */
1775         if (vnic_rq_desc_used(&enic->rq[0]) == 0) {
1776                 netdev_err(netdev, "Unable to alloc receive buffers.\n");
1777                 return;
1778         }
1779
1780         /* Start RQ */
1781         vnic_rq_enable(&enic->rq[0]);
1782         napi_enable(&enic->napi[0]);
1783         vnic_intr_unmask(&enic->intr[0]);
1784         enic_notify_timer_start(enic);
1785
1786         rtnl_unlock();
1787
1788         netdev_info(netdev, "interface MTU set as %d\n", netdev->mtu);
1789 }
1790
1791 #ifdef CONFIG_NET_POLL_CONTROLLER
1792 static void enic_poll_controller(struct net_device *netdev)
1793 {
1794         struct enic *enic = netdev_priv(netdev);
1795         struct vnic_dev *vdev = enic->vdev;
1796         unsigned int i, intr;
1797
1798         switch (vnic_dev_get_intr_mode(vdev)) {
1799         case VNIC_DEV_INTR_MODE_MSIX:
1800                 for (i = 0; i < enic->rq_count; i++) {
1801                         intr = enic_msix_rq_intr(enic, i);
1802                         enic_isr_msix_rq(enic->msix_entry[intr].vector,
1803                                 &enic->napi[i]);
1804                 }
1805
1806                 for (i = 0; i < enic->wq_count; i++) {
1807                         intr = enic_msix_wq_intr(enic, i);
1808                         enic_isr_msix_wq(enic->msix_entry[intr].vector, enic);
1809                 }
1810
1811                 break;
1812         case VNIC_DEV_INTR_MODE_MSI:
1813                 enic_isr_msi(enic->pdev->irq, enic);
1814                 break;
1815         case VNIC_DEV_INTR_MODE_INTX:
1816                 enic_isr_legacy(enic->pdev->irq, netdev);
1817                 break;
1818         default:
1819                 break;
1820         }
1821 }
1822 #endif
1823
1824 static int enic_dev_wait(struct vnic_dev *vdev,
1825         int (*start)(struct vnic_dev *, int),
1826         int (*finished)(struct vnic_dev *, int *),
1827         int arg)
1828 {
1829         unsigned long time;
1830         int done;
1831         int err;
1832
1833         BUG_ON(in_interrupt());
1834
1835         err = start(vdev, arg);
1836         if (err)
1837                 return err;
1838
1839         /* Wait for func to complete...2 seconds max
1840          */
1841
1842         time = jiffies + (HZ * 2);
1843         do {
1844
1845                 err = finished(vdev, &done);
1846                 if (err)
1847                         return err;
1848
1849                 if (done)
1850                         return 0;
1851
1852                 schedule_timeout_uninterruptible(HZ / 10);
1853
1854         } while (time_after(time, jiffies));
1855
1856         return -ETIMEDOUT;
1857 }
1858
1859 static int enic_dev_open(struct enic *enic)
1860 {
1861         int err;
1862
1863         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1864                 vnic_dev_open_done, 0);
1865         if (err)
1866                 dev_err(enic_get_dev(enic), "vNIC device open failed, err %d\n",
1867                         err);
1868
1869         return err;
1870 }
1871
1872 static int enic_dev_hang_reset(struct enic *enic)
1873 {
1874         int err;
1875
1876         err = enic_dev_wait(enic->vdev, vnic_dev_hang_reset,
1877                 vnic_dev_hang_reset_done, 0);
1878         if (err)
1879                 netdev_err(enic->netdev, "vNIC hang reset failed, err %d\n",
1880                         err);
1881
1882         return err;
1883 }
1884
1885 static int enic_set_rsskey(struct enic *enic)
1886 {
1887         dma_addr_t rss_key_buf_pa;
1888         union vnic_rss_key *rss_key_buf_va = NULL;
1889         union vnic_rss_key rss_key = {
1890                 .key[0].b = {85, 67, 83, 97, 119, 101, 115, 111, 109, 101},
1891                 .key[1].b = {80, 65, 76, 79, 117, 110, 105, 113, 117, 101},
1892                 .key[2].b = {76, 73, 78, 85, 88, 114, 111, 99, 107, 115},
1893                 .key[3].b = {69, 78, 73, 67, 105, 115, 99, 111, 111, 108},
1894         };
1895         int err;
1896
1897         rss_key_buf_va = pci_alloc_consistent(enic->pdev,
1898                 sizeof(union vnic_rss_key), &rss_key_buf_pa);
1899         if (!rss_key_buf_va)
1900                 return -ENOMEM;
1901
1902         memcpy(rss_key_buf_va, &rss_key, sizeof(union vnic_rss_key));
1903
1904         spin_lock(&enic->devcmd_lock);
1905         err = enic_set_rss_key(enic,
1906                 rss_key_buf_pa,
1907                 sizeof(union vnic_rss_key));
1908         spin_unlock(&enic->devcmd_lock);
1909
1910         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_key),
1911                 rss_key_buf_va, rss_key_buf_pa);
1912
1913         return err;
1914 }
1915
1916 static int enic_set_rsscpu(struct enic *enic, u8 rss_hash_bits)
1917 {
1918         dma_addr_t rss_cpu_buf_pa;
1919         union vnic_rss_cpu *rss_cpu_buf_va = NULL;
1920         unsigned int i;
1921         int err;
1922
1923         rss_cpu_buf_va = pci_alloc_consistent(enic->pdev,
1924                 sizeof(union vnic_rss_cpu), &rss_cpu_buf_pa);
1925         if (!rss_cpu_buf_va)
1926                 return -ENOMEM;
1927
1928         for (i = 0; i < (1 << rss_hash_bits); i++)
1929                 (*rss_cpu_buf_va).cpu[i/4].b[i%4] = i % enic->rq_count;
1930
1931         spin_lock(&enic->devcmd_lock);
1932         err = enic_set_rss_cpu(enic,
1933                 rss_cpu_buf_pa,
1934                 sizeof(union vnic_rss_cpu));
1935         spin_unlock(&enic->devcmd_lock);
1936
1937         pci_free_consistent(enic->pdev, sizeof(union vnic_rss_cpu),
1938                 rss_cpu_buf_va, rss_cpu_buf_pa);
1939
1940         return err;
1941 }
1942
1943 static int enic_set_niccfg(struct enic *enic, u8 rss_default_cpu,
1944         u8 rss_hash_type, u8 rss_hash_bits, u8 rss_base_cpu, u8 rss_enable)
1945 {
1946         const u8 tso_ipid_split_en = 0;
1947         const u8 ig_vlan_strip_en = 1;
1948         int err;
1949
1950         /* Enable VLAN tag stripping.
1951         */
1952
1953         spin_lock(&enic->devcmd_lock);
1954         err = enic_set_nic_cfg(enic,
1955                 rss_default_cpu, rss_hash_type,
1956                 rss_hash_bits, rss_base_cpu,
1957                 rss_enable, tso_ipid_split_en,
1958                 ig_vlan_strip_en);
1959         spin_unlock(&enic->devcmd_lock);
1960
1961         return err;
1962 }
1963
1964 static int enic_set_rss_nic_cfg(struct enic *enic)
1965 {
1966         struct device *dev = enic_get_dev(enic);
1967         const u8 rss_default_cpu = 0;
1968         const u8 rss_hash_type = NIC_CFG_RSS_HASH_TYPE_IPV4 |
1969                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV4 |
1970                 NIC_CFG_RSS_HASH_TYPE_IPV6 |
1971                 NIC_CFG_RSS_HASH_TYPE_TCP_IPV6;
1972         const u8 rss_hash_bits = 7;
1973         const u8 rss_base_cpu = 0;
1974         u8 rss_enable = ENIC_SETTING(enic, RSS) && (enic->rq_count > 1);
1975
1976         if (rss_enable) {
1977                 if (!enic_set_rsskey(enic)) {
1978                         if (enic_set_rsscpu(enic, rss_hash_bits)) {
1979                                 rss_enable = 0;
1980                                 dev_warn(dev, "RSS disabled, "
1981                                         "Failed to set RSS cpu indirection table.");
1982                         }
1983                 } else {
1984                         rss_enable = 0;
1985                         dev_warn(dev, "RSS disabled, Failed to set RSS key.\n");
1986                 }
1987         }
1988
1989         return enic_set_niccfg(enic, rss_default_cpu, rss_hash_type,
1990                 rss_hash_bits, rss_base_cpu, rss_enable);
1991 }
1992
1993 static void enic_reset(struct work_struct *work)
1994 {
1995         struct enic *enic = container_of(work, struct enic, reset);
1996
1997         if (!netif_running(enic->netdev))
1998                 return;
1999
2000         rtnl_lock();
2001
2002         enic_dev_hang_notify(enic);
2003         enic_stop(enic->netdev);
2004         enic_dev_hang_reset(enic);
2005         enic_reset_addr_lists(enic);
2006         enic_init_vnic_resources(enic);
2007         enic_set_rss_nic_cfg(enic);
2008         enic_dev_set_ig_vlan_rewrite_mode(enic);
2009         enic_open(enic->netdev);
2010
2011         rtnl_unlock();
2012 }
2013
2014 static int enic_set_intr_mode(struct enic *enic)
2015 {
2016         unsigned int n = min_t(unsigned int, enic->rq_count, ENIC_RQ_MAX);
2017         unsigned int m = min_t(unsigned int, enic->wq_count, ENIC_WQ_MAX);
2018         unsigned int i;
2019
2020         /* Set interrupt mode (INTx, MSI, MSI-X) depending
2021          * on system capabilities.
2022          *
2023          * Try MSI-X first
2024          *
2025          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
2026          * (the second to last INTR is used for WQ/RQ errors)
2027          * (the last INTR is used for notifications)
2028          */
2029
2030         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
2031         for (i = 0; i < n + m + 2; i++)
2032                 enic->msix_entry[i].entry = i;
2033
2034         /* Use multiple RQs if RSS is enabled
2035          */
2036
2037         if (ENIC_SETTING(enic, RSS) &&
2038             enic->config.intr_mode < 1 &&
2039             enic->rq_count >= n &&
2040             enic->wq_count >= m &&
2041             enic->cq_count >= n + m &&
2042             enic->intr_count >= n + m + 2) {
2043
2044                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
2045
2046                         enic->rq_count = n;
2047                         enic->wq_count = m;
2048                         enic->cq_count = n + m;
2049                         enic->intr_count = n + m + 2;
2050
2051                         vnic_dev_set_intr_mode(enic->vdev,
2052                                 VNIC_DEV_INTR_MODE_MSIX);
2053
2054                         return 0;
2055                 }
2056         }
2057
2058         if (enic->config.intr_mode < 1 &&
2059             enic->rq_count >= 1 &&
2060             enic->wq_count >= m &&
2061             enic->cq_count >= 1 + m &&
2062             enic->intr_count >= 1 + m + 2) {
2063                 if (!pci_enable_msix(enic->pdev, enic->msix_entry, 1 + m + 2)) {
2064
2065                         enic->rq_count = 1;
2066                         enic->wq_count = m;
2067                         enic->cq_count = 1 + m;
2068                         enic->intr_count = 1 + m + 2;
2069
2070                         vnic_dev_set_intr_mode(enic->vdev,
2071                                 VNIC_DEV_INTR_MODE_MSIX);
2072
2073                         return 0;
2074                 }
2075         }
2076
2077         /* Next try MSI
2078          *
2079          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2080          */
2081
2082         if (enic->config.intr_mode < 2 &&
2083             enic->rq_count >= 1 &&
2084             enic->wq_count >= 1 &&
2085             enic->cq_count >= 2 &&
2086             enic->intr_count >= 1 &&
2087             !pci_enable_msi(enic->pdev)) {
2088
2089                 enic->rq_count = 1;
2090                 enic->wq_count = 1;
2091                 enic->cq_count = 2;
2092                 enic->intr_count = 1;
2093
2094                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2095
2096                 return 0;
2097         }
2098
2099         /* Next try INTx
2100          *
2101          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2102          * (the first INTR is used for WQ/RQ)
2103          * (the second INTR is used for WQ/RQ errors)
2104          * (the last INTR is used for notifications)
2105          */
2106
2107         if (enic->config.intr_mode < 3 &&
2108             enic->rq_count >= 1 &&
2109             enic->wq_count >= 1 &&
2110             enic->cq_count >= 2 &&
2111             enic->intr_count >= 3) {
2112
2113                 enic->rq_count = 1;
2114                 enic->wq_count = 1;
2115                 enic->cq_count = 2;
2116                 enic->intr_count = 3;
2117
2118                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2119
2120                 return 0;
2121         }
2122
2123         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2124
2125         return -EINVAL;
2126 }
2127
2128 static void enic_clear_intr_mode(struct enic *enic)
2129 {
2130         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2131         case VNIC_DEV_INTR_MODE_MSIX:
2132                 pci_disable_msix(enic->pdev);
2133                 break;
2134         case VNIC_DEV_INTR_MODE_MSI:
2135                 pci_disable_msi(enic->pdev);
2136                 break;
2137         default:
2138                 break;
2139         }
2140
2141         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2142 }
2143
2144 static const struct net_device_ops enic_netdev_dynamic_ops = {
2145         .ndo_open               = enic_open,
2146         .ndo_stop               = enic_stop,
2147         .ndo_start_xmit         = enic_hard_start_xmit,
2148         .ndo_get_stats64        = enic_get_stats,
2149         .ndo_validate_addr      = eth_validate_addr,
2150         .ndo_set_rx_mode        = enic_set_rx_mode,
2151         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2152         .ndo_change_mtu         = enic_change_mtu,
2153         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2154         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2155         .ndo_tx_timeout         = enic_tx_timeout,
2156         .ndo_set_vf_port        = enic_set_vf_port,
2157         .ndo_get_vf_port        = enic_get_vf_port,
2158         .ndo_set_vf_mac         = enic_set_vf_mac,
2159 #ifdef CONFIG_NET_POLL_CONTROLLER
2160         .ndo_poll_controller    = enic_poll_controller,
2161 #endif
2162 };
2163
2164 static const struct net_device_ops enic_netdev_ops = {
2165         .ndo_open               = enic_open,
2166         .ndo_stop               = enic_stop,
2167         .ndo_start_xmit         = enic_hard_start_xmit,
2168         .ndo_get_stats64        = enic_get_stats,
2169         .ndo_validate_addr      = eth_validate_addr,
2170         .ndo_set_mac_address    = enic_set_mac_address,
2171         .ndo_set_rx_mode        = enic_set_rx_mode,
2172         .ndo_change_mtu         = enic_change_mtu,
2173         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2174         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2175         .ndo_tx_timeout         = enic_tx_timeout,
2176         .ndo_set_vf_port        = enic_set_vf_port,
2177         .ndo_get_vf_port        = enic_get_vf_port,
2178         .ndo_set_vf_mac         = enic_set_vf_mac,
2179 #ifdef CONFIG_NET_POLL_CONTROLLER
2180         .ndo_poll_controller    = enic_poll_controller,
2181 #endif
2182 };
2183
2184 static void enic_dev_deinit(struct enic *enic)
2185 {
2186         unsigned int i;
2187
2188         for (i = 0; i < enic->rq_count; i++)
2189                 netif_napi_del(&enic->napi[i]);
2190
2191         enic_free_vnic_resources(enic);
2192         enic_clear_intr_mode(enic);
2193 }
2194
2195 static int enic_dev_init(struct enic *enic)
2196 {
2197         struct device *dev = enic_get_dev(enic);
2198         struct net_device *netdev = enic->netdev;
2199         unsigned int i;
2200         int err;
2201
2202         /* Get interrupt coalesce timer info */
2203         err = enic_dev_intr_coal_timer_info(enic);
2204         if (err) {
2205                 dev_warn(dev, "Using default conversion factor for "
2206                         "interrupt coalesce timer\n");
2207                 vnic_dev_intr_coal_timer_info_default(enic->vdev);
2208         }
2209
2210         /* Get vNIC configuration
2211          */
2212
2213         err = enic_get_vnic_config(enic);
2214         if (err) {
2215                 dev_err(dev, "Get vNIC configuration failed, aborting\n");
2216                 return err;
2217         }
2218
2219         /* Get available resource counts
2220          */
2221
2222         enic_get_res_counts(enic);
2223
2224         /* Set interrupt mode based on resource counts and system
2225          * capabilities
2226          */
2227
2228         err = enic_set_intr_mode(enic);
2229         if (err) {
2230                 dev_err(dev, "Failed to set intr mode based on resource "
2231                         "counts and system capabilities, aborting\n");
2232                 return err;
2233         }
2234
2235         /* Allocate and configure vNIC resources
2236          */
2237
2238         err = enic_alloc_vnic_resources(enic);
2239         if (err) {
2240                 dev_err(dev, "Failed to alloc vNIC resources, aborting\n");
2241                 goto err_out_free_vnic_resources;
2242         }
2243
2244         enic_init_vnic_resources(enic);
2245
2246         err = enic_set_rss_nic_cfg(enic);
2247         if (err) {
2248                 dev_err(dev, "Failed to config nic, aborting\n");
2249                 goto err_out_free_vnic_resources;
2250         }
2251
2252         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2253         default:
2254                 netif_napi_add(netdev, &enic->napi[0], enic_poll, 64);
2255                 break;
2256         case VNIC_DEV_INTR_MODE_MSIX:
2257                 for (i = 0; i < enic->rq_count; i++)
2258                         netif_napi_add(netdev, &enic->napi[i],
2259                                 enic_poll_msix, 64);
2260                 break;
2261         }
2262
2263         return 0;
2264
2265 err_out_free_vnic_resources:
2266         enic_clear_intr_mode(enic);
2267         enic_free_vnic_resources(enic);
2268
2269         return err;
2270 }
2271
2272 static void enic_iounmap(struct enic *enic)
2273 {
2274         unsigned int i;
2275
2276         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2277                 if (enic->bar[i].vaddr)
2278                         iounmap(enic->bar[i].vaddr);
2279 }
2280
2281 static int enic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2282 {
2283         struct device *dev = &pdev->dev;
2284         struct net_device *netdev;
2285         struct enic *enic;
2286         int using_dac = 0;
2287         unsigned int i;
2288         int err;
2289 #ifdef CONFIG_PCI_IOV
2290         int pos = 0;
2291 #endif
2292         int num_pps = 1;
2293
2294         /* Allocate net device structure and initialize.  Private
2295          * instance data is initialized to zero.
2296          */
2297
2298         netdev = alloc_etherdev(sizeof(struct enic));
2299         if (!netdev)
2300                 return -ENOMEM;
2301
2302         pci_set_drvdata(pdev, netdev);
2303
2304         SET_NETDEV_DEV(netdev, &pdev->dev);
2305
2306         enic = netdev_priv(netdev);
2307         enic->netdev = netdev;
2308         enic->pdev = pdev;
2309
2310         /* Setup PCI resources
2311          */
2312
2313         err = pci_enable_device_mem(pdev);
2314         if (err) {
2315                 dev_err(dev, "Cannot enable PCI device, aborting\n");
2316                 goto err_out_free_netdev;
2317         }
2318
2319         err = pci_request_regions(pdev, DRV_NAME);
2320         if (err) {
2321                 dev_err(dev, "Cannot request PCI regions, aborting\n");
2322                 goto err_out_disable_device;
2323         }
2324
2325         pci_set_master(pdev);
2326
2327         /* Query PCI controller on system for DMA addressing
2328          * limitation for the device.  Try 40-bit first, and
2329          * fail to 32-bit.
2330          */
2331
2332         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2333         if (err) {
2334                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2335                 if (err) {
2336                         dev_err(dev, "No usable DMA configuration, aborting\n");
2337                         goto err_out_release_regions;
2338                 }
2339                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2340                 if (err) {
2341                         dev_err(dev, "Unable to obtain %u-bit DMA "
2342                                 "for consistent allocations, aborting\n", 32);
2343                         goto err_out_release_regions;
2344                 }
2345         } else {
2346                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2347                 if (err) {
2348                         dev_err(dev, "Unable to obtain %u-bit DMA "
2349                                 "for consistent allocations, aborting\n", 40);
2350                         goto err_out_release_regions;
2351                 }
2352                 using_dac = 1;
2353         }
2354
2355         /* Map vNIC resources from BAR0-5
2356          */
2357
2358         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2359                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2360                         continue;
2361                 enic->bar[i].len = pci_resource_len(pdev, i);
2362                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2363                 if (!enic->bar[i].vaddr) {
2364                         dev_err(dev, "Cannot memory-map BAR %d, aborting\n", i);
2365                         err = -ENODEV;
2366                         goto err_out_iounmap;
2367                 }
2368                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2369         }
2370
2371         /* Register vNIC device
2372          */
2373
2374         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2375                 ARRAY_SIZE(enic->bar));
2376         if (!enic->vdev) {
2377                 dev_err(dev, "vNIC registration failed, aborting\n");
2378                 err = -ENODEV;
2379                 goto err_out_iounmap;
2380         }
2381
2382 #ifdef CONFIG_PCI_IOV
2383         /* Get number of subvnics */
2384         pos = pci_find_ext_capability(pdev, PCI_EXT_CAP_ID_SRIOV);
2385         if (pos) {
2386                 pci_read_config_word(pdev, pos + PCI_SRIOV_TOTAL_VF,
2387                         &enic->num_vfs);
2388                 if (enic->num_vfs) {
2389                         err = pci_enable_sriov(pdev, enic->num_vfs);
2390                         if (err) {
2391                                 dev_err(dev, "SRIOV enable failed, aborting."
2392                                         " pci_enable_sriov() returned %d\n",
2393                                         err);
2394                                 goto err_out_vnic_unregister;
2395                         }
2396                         enic->priv_flags |= ENIC_SRIOV_ENABLED;
2397                         num_pps = enic->num_vfs;
2398                 }
2399         }
2400 #endif
2401
2402         /* Allocate structure for port profiles */
2403         enic->pp = kcalloc(num_pps, sizeof(*enic->pp), GFP_KERNEL);
2404         if (!enic->pp) {
2405                 err = -ENOMEM;
2406                 goto err_out_disable_sriov_pp;
2407         }
2408
2409         /* Issue device open to get device in known state
2410          */
2411
2412         err = enic_dev_open(enic);
2413         if (err) {
2414                 dev_err(dev, "vNIC dev open failed, aborting\n");
2415                 goto err_out_disable_sriov;
2416         }
2417
2418         /* Setup devcmd lock
2419          */
2420
2421         spin_lock_init(&enic->devcmd_lock);
2422
2423         /*
2424          * Set ingress vlan rewrite mode before vnic initialization
2425          */
2426
2427         err = enic_dev_set_ig_vlan_rewrite_mode(enic);
2428         if (err) {
2429                 dev_err(dev,
2430                         "Failed to set ingress vlan rewrite mode, aborting.\n");
2431                 goto err_out_dev_close;
2432         }
2433
2434         /* Issue device init to initialize the vnic-to-switch link.
2435          * We'll start with carrier off and wait for link UP
2436          * notification later to turn on carrier.  We don't need
2437          * to wait here for the vnic-to-switch link initialization
2438          * to complete; link UP notification is the indication that
2439          * the process is complete.
2440          */
2441
2442         netif_carrier_off(netdev);
2443
2444         /* Do not call dev_init for a dynamic vnic.
2445          * For a dynamic vnic, init_prov_info will be
2446          * called later by an upper layer.
2447          */
2448
2449         if (!enic_is_dynamic(enic)) {
2450                 err = vnic_dev_init(enic->vdev, 0);
2451                 if (err) {
2452                         dev_err(dev, "vNIC dev init failed, aborting\n");
2453                         goto err_out_dev_close;
2454                 }
2455         }
2456
2457         err = enic_dev_init(enic);
2458         if (err) {
2459                 dev_err(dev, "Device initialization failed, aborting\n");
2460                 goto err_out_dev_close;
2461         }
2462
2463         /* Setup notification timer, HW reset task, and wq locks
2464          */
2465
2466         init_timer(&enic->notify_timer);
2467         enic->notify_timer.function = enic_notify_timer;
2468         enic->notify_timer.data = (unsigned long)enic;
2469
2470         INIT_WORK(&enic->reset, enic_reset);
2471         INIT_WORK(&enic->change_mtu_work, enic_change_mtu_work);
2472
2473         for (i = 0; i < enic->wq_count; i++)
2474                 spin_lock_init(&enic->wq_lock[i]);
2475
2476         /* Register net device
2477          */
2478
2479         enic->port_mtu = enic->config.mtu;
2480         (void)enic_change_mtu(netdev, enic->port_mtu);
2481
2482         err = enic_set_mac_addr(netdev, enic->mac_addr);
2483         if (err) {
2484                 dev_err(dev, "Invalid MAC address, aborting\n");
2485                 goto err_out_dev_deinit;
2486         }
2487
2488         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2489         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2490
2491         if (enic_is_dynamic(enic) || enic_is_sriov_vf(enic))
2492                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2493         else
2494                 netdev->netdev_ops = &enic_netdev_ops;
2495
2496         netdev->watchdog_timeo = 2 * HZ;
2497         netdev->ethtool_ops = &enic_ethtool_ops;
2498
2499         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2500         if (ENIC_SETTING(enic, LOOP)) {
2501                 netdev->features &= ~NETIF_F_HW_VLAN_TX;
2502                 enic->loop_enable = 1;
2503                 enic->loop_tag = enic->config.loop_tag;
2504                 dev_info(dev, "loopback tag=0x%04x\n", enic->loop_tag);
2505         }
2506         if (ENIC_SETTING(enic, TXCSUM))
2507                 netdev->hw_features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2508         if (ENIC_SETTING(enic, TSO))
2509                 netdev->hw_features |= NETIF_F_TSO |
2510                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2511         if (ENIC_SETTING(enic, RXCSUM))
2512                 netdev->hw_features |= NETIF_F_RXCSUM;
2513
2514         netdev->features |= netdev->hw_features;
2515
2516         if (using_dac)
2517                 netdev->features |= NETIF_F_HIGHDMA;
2518
2519         netdev->priv_flags |= IFF_UNICAST_FLT;
2520
2521         err = register_netdev(netdev);
2522         if (err) {
2523                 dev_err(dev, "Cannot register net device, aborting\n");
2524                 goto err_out_dev_deinit;
2525         }
2526
2527         return 0;
2528
2529 err_out_dev_deinit:
2530         enic_dev_deinit(enic);
2531 err_out_dev_close:
2532         vnic_dev_close(enic->vdev);
2533 err_out_disable_sriov:
2534         kfree(enic->pp);
2535 err_out_disable_sriov_pp:
2536 #ifdef CONFIG_PCI_IOV
2537         if (enic_sriov_enabled(enic)) {
2538                 pci_disable_sriov(pdev);
2539                 enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2540         }
2541 err_out_vnic_unregister:
2542 #endif
2543         vnic_dev_unregister(enic->vdev);
2544 err_out_iounmap:
2545         enic_iounmap(enic);
2546 err_out_release_regions:
2547         pci_release_regions(pdev);
2548 err_out_disable_device:
2549         pci_disable_device(pdev);
2550 err_out_free_netdev:
2551         pci_set_drvdata(pdev, NULL);
2552         free_netdev(netdev);
2553
2554         return err;
2555 }
2556
2557 static void enic_remove(struct pci_dev *pdev)
2558 {
2559         struct net_device *netdev = pci_get_drvdata(pdev);
2560
2561         if (netdev) {
2562                 struct enic *enic = netdev_priv(netdev);
2563
2564                 cancel_work_sync(&enic->reset);
2565                 cancel_work_sync(&enic->change_mtu_work);
2566                 unregister_netdev(netdev);
2567                 enic_dev_deinit(enic);
2568                 vnic_dev_close(enic->vdev);
2569 #ifdef CONFIG_PCI_IOV
2570                 if (enic_sriov_enabled(enic)) {
2571                         pci_disable_sriov(pdev);
2572                         enic->priv_flags &= ~ENIC_SRIOV_ENABLED;
2573                 }
2574 #endif
2575                 kfree(enic->pp);
2576                 vnic_dev_unregister(enic->vdev);
2577                 enic_iounmap(enic);
2578                 pci_release_regions(pdev);
2579                 pci_disable_device(pdev);
2580                 pci_set_drvdata(pdev, NULL);
2581                 free_netdev(netdev);
2582         }
2583 }
2584
2585 static struct pci_driver enic_driver = {
2586         .name = DRV_NAME,
2587         .id_table = enic_id_table,
2588         .probe = enic_probe,
2589         .remove = enic_remove,
2590 };
2591
2592 static int __init enic_init_module(void)
2593 {
2594         pr_info("%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2595
2596         return pci_register_driver(&enic_driver);
2597 }
2598
2599 static void __exit enic_cleanup_module(void)
2600 {
2601         pci_unregister_driver(&enic_driver);
2602 }
2603
2604 module_init(enic_init_module);
2605 module_exit(enic_cleanup_module);