SAFE public projects git trees. - safe/jmp/linux-2.6/blob - drivers/net/enic/enic_main.c

   1 /*
   2  * Copyright 2008 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/workqueue.h>
  27 #include <linux/pci.h>
  28 #include <linux/netdevice.h>
  29 #include <linux/etherdevice.h>
  30 #include <linux/if_ether.h>
  31 #include <linux/if_vlan.h>
  32 #include <linux/if_link.h>
  33 #include <linux/ethtool.h>
  34 #include <linux/in.h>
  35 #include <linux/ip.h>
  36 #include <linux/ipv6.h>
  37 #include <linux/tcp.h>
  38 #include <net/ip6_checksum.h>
  39
  40 #include "cq_enet_desc.h"
  41 #include "vnic_dev.h"
  42 #include "vnic_intr.h"
  43 #include "vnic_stats.h"
  44 #include "vnic_vic.h"
  45 #include "enic_res.h"
  46 #include "enic.h"
  47
  48 #define ENIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  49 #define WQ_ENET_MAX_DESC_LEN            (1 << WQ_ENET_LEN_BITS)
  50 #define MAX_TSO                         (1 << 16)
  51 #define ENIC_DESC_MAX_SPLITS            (MAX_TSO / WQ_ENET_MAX_DESC_LEN + 1)
  52
  53 #define PCI_DEVICE_ID_CISCO_VIC_ENET         0x0043  /* ethernet vnic */
  54 #define PCI_DEVICE_ID_CISCO_VIC_ENET_DYN     0x0044  /* enet dynamic vnic */
  55
  56 /* Supported devices */
  57 static DEFINE_PCI_DEVICE_TABLE(enic_id_table) = {
  58         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET) },
  59         { PCI_VDEVICE(CISCO, PCI_DEVICE_ID_CISCO_VIC_ENET_DYN) },
  60         { 0, }  /* end of table */
  61 };
  62
  63 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  64 MODULE_AUTHOR("Scott Feldman <scofeldm@cisco.com>");
  65 MODULE_LICENSE("GPL");
  66 MODULE_VERSION(DRV_VERSION);
  67 MODULE_DEVICE_TABLE(pci, enic_id_table);
  68
  69 struct enic_stat {
  70         char name[ETH_GSTRING_LEN];
  71         unsigned int offset;
  72 };
  73
  74 #define ENIC_TX_STAT(stat)      \
  75         { .name = #stat, .offset = offsetof(struct vnic_tx_stats, stat) / 8 }
  76 #define ENIC_RX_STAT(stat)      \
  77         { .name = #stat, .offset = offsetof(struct vnic_rx_stats, stat) / 8 }
  78
  79 static const struct enic_stat enic_tx_stats[] = {
  80         ENIC_TX_STAT(tx_frames_ok),
  81         ENIC_TX_STAT(tx_unicast_frames_ok),
  82         ENIC_TX_STAT(tx_multicast_frames_ok),
  83         ENIC_TX_STAT(tx_broadcast_frames_ok),
  84         ENIC_TX_STAT(tx_bytes_ok),
  85         ENIC_TX_STAT(tx_unicast_bytes_ok),
  86         ENIC_TX_STAT(tx_multicast_bytes_ok),
  87         ENIC_TX_STAT(tx_broadcast_bytes_ok),
  88         ENIC_TX_STAT(tx_drops),
  89         ENIC_TX_STAT(tx_errors),
  90         ENIC_TX_STAT(tx_tso),
  91 };
  92
  93 static const struct enic_stat enic_rx_stats[] = {
  94         ENIC_RX_STAT(rx_frames_ok),
  95         ENIC_RX_STAT(rx_frames_total),
  96         ENIC_RX_STAT(rx_unicast_frames_ok),
  97         ENIC_RX_STAT(rx_multicast_frames_ok),
  98         ENIC_RX_STAT(rx_broadcast_frames_ok),
  99         ENIC_RX_STAT(rx_bytes_ok),
 100         ENIC_RX_STAT(rx_unicast_bytes_ok),
 101         ENIC_RX_STAT(rx_multicast_bytes_ok),
 102         ENIC_RX_STAT(rx_broadcast_bytes_ok),
 103         ENIC_RX_STAT(rx_drop),
 104         ENIC_RX_STAT(rx_no_bufs),
 105         ENIC_RX_STAT(rx_errors),
 106         ENIC_RX_STAT(rx_rss),
 107         ENIC_RX_STAT(rx_crc_errors),
 108         ENIC_RX_STAT(rx_frames_64),
 109         ENIC_RX_STAT(rx_frames_127),
 110         ENIC_RX_STAT(rx_frames_255),
 111         ENIC_RX_STAT(rx_frames_511),
 112         ENIC_RX_STAT(rx_frames_1023),
 113         ENIC_RX_STAT(rx_frames_1518),
 114         ENIC_RX_STAT(rx_frames_to_max),
 115 };
 116
 117 static const unsigned int enic_n_tx_stats = ARRAY_SIZE(enic_tx_stats);
 118 static const unsigned int enic_n_rx_stats = ARRAY_SIZE(enic_rx_stats);
 119
 120 static int enic_is_dynamic(struct enic *enic)
 121 {
 122         return enic->pdev->device == PCI_DEVICE_ID_CISCO_VIC_ENET_DYN;
 123 }
 124
 125 static int enic_get_settings(struct net_device *netdev,
 126         struct ethtool_cmd *ecmd)
 127 {
 128         struct enic *enic = netdev_priv(netdev);
 129
 130         ecmd->supported = (SUPPORTED_10000baseT_Full | SUPPORTED_FIBRE);
 131         ecmd->advertising = (ADVERTISED_10000baseT_Full | ADVERTISED_FIBRE);
 132         ecmd->port = PORT_FIBRE;
 133         ecmd->transceiver = XCVR_EXTERNAL;
 134
 135         if (netif_carrier_ok(netdev)) {
 136                 ecmd->speed = vnic_dev_port_speed(enic->vdev);
 137                 ecmd->duplex = DUPLEX_FULL;
 138         } else {
 139                 ecmd->speed = -1;
 140                 ecmd->duplex = -1;
 141         }
 142
 143         ecmd->autoneg = AUTONEG_DISABLE;
 144
 145         return 0;
 146 }
 147
 148 static void enic_get_drvinfo(struct net_device *netdev,
 149         struct ethtool_drvinfo *drvinfo)
 150 {
 151         struct enic *enic = netdev_priv(netdev);
 152         struct vnic_devcmd_fw_info *fw_info;
 153
 154         spin_lock(&enic->devcmd_lock);
 155         vnic_dev_fw_info(enic->vdev, &fw_info);
 156         spin_unlock(&enic->devcmd_lock);
 157
 158         strncpy(drvinfo->driver, DRV_NAME, sizeof(drvinfo->driver));
 159         strncpy(drvinfo->version, DRV_VERSION, sizeof(drvinfo->version));
 160         strncpy(drvinfo->fw_version, fw_info->fw_version,
 161                 sizeof(drvinfo->fw_version));
 162         strncpy(drvinfo->bus_info, pci_name(enic->pdev),
 163                 sizeof(drvinfo->bus_info));
 164 }
 165
 166 static void enic_get_strings(struct net_device *netdev, u32 stringset, u8 *data)
 167 {
 168         unsigned int i;
 169
 170         switch (stringset) {
 171         case ETH_SS_STATS:
 172                 for (i = 0; i < enic_n_tx_stats; i++) {
 173                         memcpy(data, enic_tx_stats[i].name, ETH_GSTRING_LEN);
 174                         data += ETH_GSTRING_LEN;
 175                 }
 176                 for (i = 0; i < enic_n_rx_stats; i++) {
 177                         memcpy(data, enic_rx_stats[i].name, ETH_GSTRING_LEN);
 178                         data += ETH_GSTRING_LEN;
 179                 }
 180                 break;
 181         }
 182 }
 183
 184 static int enic_get_sset_count(struct net_device *netdev, int sset)
 185 {
 186         switch (sset) {
 187         case ETH_SS_STATS:
 188                 return enic_n_tx_stats + enic_n_rx_stats;
 189         default:
 190                 return -EOPNOTSUPP;
 191         }
 192 }
 193
 194 static void enic_get_ethtool_stats(struct net_device *netdev,
 195         struct ethtool_stats *stats, u64 *data)
 196 {
 197         struct enic *enic = netdev_priv(netdev);
 198         struct vnic_stats *vstats;
 199         unsigned int i;
 200
 201         spin_lock(&enic->devcmd_lock);
 202         vnic_dev_stats_dump(enic->vdev, &vstats);
 203         spin_unlock(&enic->devcmd_lock);
 204
 205         for (i = 0; i < enic_n_tx_stats; i++)
 206                 *(data++) = ((u64 *)&vstats->tx)[enic_tx_stats[i].offset];
 207         for (i = 0; i < enic_n_rx_stats; i++)
 208                 *(data++) = ((u64 *)&vstats->rx)[enic_rx_stats[i].offset];
 209 }
 210
 211 static u32 enic_get_rx_csum(struct net_device *netdev)
 212 {
 213         struct enic *enic = netdev_priv(netdev);
 214         return enic->csum_rx_enabled;
 215 }
 216
 217 static int enic_set_rx_csum(struct net_device *netdev, u32 data)
 218 {
 219         struct enic *enic = netdev_priv(netdev);
 220
 221         if (data && !ENIC_SETTING(enic, RXCSUM))
 222                 return -EINVAL;
 223
 224         enic->csum_rx_enabled = !!data;
 225
 226         return 0;
 227 }
 228
 229 static int enic_set_tx_csum(struct net_device *netdev, u32 data)
 230 {
 231         struct enic *enic = netdev_priv(netdev);
 232
 233         if (data && !ENIC_SETTING(enic, TXCSUM))
 234                 return -EINVAL;
 235
 236         if (data)
 237                 netdev->features |= NETIF_F_HW_CSUM;
 238         else
 239                 netdev->features &= ~NETIF_F_HW_CSUM;
 240
 241         return 0;
 242 }
 243
 244 static int enic_set_tso(struct net_device *netdev, u32 data)
 245 {
 246         struct enic *enic = netdev_priv(netdev);
 247
 248         if (data && !ENIC_SETTING(enic, TSO))
 249                 return -EINVAL;
 250
 251         if (data)
 252                 netdev->features |=
 253                         NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN;
 254         else
 255                 netdev->features &=
 256                         ~(NETIF_F_TSO | NETIF_F_TSO6 | NETIF_F_TSO_ECN);
 257
 258         return 0;
 259 }
 260
 261 static u32 enic_get_msglevel(struct net_device *netdev)
 262 {
 263         struct enic *enic = netdev_priv(netdev);
 264         return enic->msg_enable;
 265 }
 266
 267 static void enic_set_msglevel(struct net_device *netdev, u32 value)
 268 {
 269         struct enic *enic = netdev_priv(netdev);
 270         enic->msg_enable = value;
 271 }
 272
 273 static int enic_get_coalesce(struct net_device *netdev,
 274         struct ethtool_coalesce *ecmd)
 275 {
 276         struct enic *enic = netdev_priv(netdev);
 277
 278         ecmd->tx_coalesce_usecs = enic->tx_coalesce_usecs;
 279         ecmd->rx_coalesce_usecs = enic->rx_coalesce_usecs;
 280
 281         return 0;
 282 }
 283
 284 static int enic_set_coalesce(struct net_device *netdev,
 285         struct ethtool_coalesce *ecmd)
 286 {
 287         struct enic *enic = netdev_priv(netdev);
 288         u32 tx_coalesce_usecs;
 289         u32 rx_coalesce_usecs;
 290
 291         tx_coalesce_usecs = min_t(u32,
 292                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 293                 ecmd->tx_coalesce_usecs);
 294         rx_coalesce_usecs = min_t(u32,
 295                 INTR_COALESCE_HW_TO_USEC(VNIC_INTR_TIMER_MAX),
 296                 ecmd->rx_coalesce_usecs);
 297
 298         switch (vnic_dev_get_intr_mode(enic->vdev)) {
 299         case VNIC_DEV_INTR_MODE_INTX:
 300                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 301                         return -EINVAL;
 302
 303                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_INTX_WQ_RQ],
 304                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 305                 break;
 306         case VNIC_DEV_INTR_MODE_MSI:
 307                 if (tx_coalesce_usecs != rx_coalesce_usecs)
 308                         return -EINVAL;
 309
 310                 vnic_intr_coalescing_timer_set(&enic->intr[0],
 311                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 312                 break;
 313         case VNIC_DEV_INTR_MODE_MSIX:
 314                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_WQ],
 315                         INTR_COALESCE_USEC_TO_HW(tx_coalesce_usecs));
 316                 vnic_intr_coalescing_timer_set(&enic->intr[ENIC_MSIX_RQ],
 317                         INTR_COALESCE_USEC_TO_HW(rx_coalesce_usecs));
 318                 break;
 319         default:
 320                 break;
 321         }
 322
 323         enic->tx_coalesce_usecs = tx_coalesce_usecs;
 324         enic->rx_coalesce_usecs = rx_coalesce_usecs;
 325
 326         return 0;
 327 }
 328
 329 static const struct ethtool_ops enic_ethtool_ops = {
 330         .get_settings = enic_get_settings,
 331         .get_drvinfo = enic_get_drvinfo,
 332         .get_msglevel = enic_get_msglevel,
 333         .set_msglevel = enic_set_msglevel,
 334         .get_link = ethtool_op_get_link,
 335         .get_strings = enic_get_strings,
 336         .get_sset_count = enic_get_sset_count,
 337         .get_ethtool_stats = enic_get_ethtool_stats,
 338         .get_rx_csum = enic_get_rx_csum,
 339         .set_rx_csum = enic_set_rx_csum,
 340         .get_tx_csum = ethtool_op_get_tx_csum,
 341         .set_tx_csum = enic_set_tx_csum,
 342         .get_sg = ethtool_op_get_sg,
 343         .set_sg = ethtool_op_set_sg,
 344         .get_tso = ethtool_op_get_tso,
 345         .set_tso = enic_set_tso,
 346         .get_coalesce = enic_get_coalesce,
 347         .set_coalesce = enic_set_coalesce,
 348         .get_flags = ethtool_op_get_flags,
 349         .set_flags = ethtool_op_set_flags,
 350 };
 351
 352 static void enic_free_wq_buf(struct vnic_wq *wq, struct vnic_wq_buf *buf)
 353 {
 354         struct enic *enic = vnic_dev_priv(wq->vdev);
 355
 356         if (buf->sop)
 357                 pci_unmap_single(enic->pdev, buf->dma_addr,
 358                         buf->len, PCI_DMA_TODEVICE);
 359         else
 360                 pci_unmap_page(enic->pdev, buf->dma_addr,
 361                         buf->len, PCI_DMA_TODEVICE);
 362
 363         if (buf->os_buf)
 364                 dev_kfree_skb_any(buf->os_buf);
 365 }
 366
 367 static void enic_wq_free_buf(struct vnic_wq *wq,
 368         struct cq_desc *cq_desc, struct vnic_wq_buf *buf, void *opaque)
 369 {
 370         enic_free_wq_buf(wq, buf);
 371 }
 372
 373 static int enic_wq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
 374         u8 type, u16 q_number, u16 completed_index, void *opaque)
 375 {
 376         struct enic *enic = vnic_dev_priv(vdev);
 377
 378         spin_lock(&enic->wq_lock[q_number]);
 379
 380         vnic_wq_service(&enic->wq[q_number], cq_desc,
 381                 completed_index, enic_wq_free_buf,
 382                 opaque);
 383
 384         if (netif_queue_stopped(enic->netdev) &&
 385             vnic_wq_desc_avail(&enic->wq[q_number]) >=
 386             (MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS))
 387                 netif_wake_queue(enic->netdev);
 388
 389         spin_unlock(&enic->wq_lock[q_number]);
 390
 391         return 0;
 392 }
 393
 394 static void enic_log_q_error(struct enic *enic)
 395 {
 396         unsigned int i;
 397         u32 error_status;
 398
 399         for (i = 0; i < enic->wq_count; i++) {
 400                 error_status = vnic_wq_error_status(&enic->wq[i]);
 401                 if (error_status)
 402                         printk(KERN_ERR PFX "%s: WQ[%d] error_status %d\n",
 403                                 enic->netdev->name, i, error_status);
 404         }
 405
 406         for (i = 0; i < enic->rq_count; i++) {
 407                 error_status = vnic_rq_error_status(&enic->rq[i]);
 408                 if (error_status)
 409                         printk(KERN_ERR PFX "%s: RQ[%d] error_status %d\n",
 410                                 enic->netdev->name, i, error_status);
 411         }
 412 }
 413
 414 static void enic_link_check(struct enic *enic)
 415 {
 416         int link_status = vnic_dev_link_status(enic->vdev);
 417         int carrier_ok = netif_carrier_ok(enic->netdev);
 418
 419         if (link_status && !carrier_ok) {
 420                 printk(KERN_INFO PFX "%s: Link UP\n", enic->netdev->name);
 421                 netif_carrier_on(enic->netdev);
 422         } else if (!link_status && carrier_ok) {
 423                 printk(KERN_INFO PFX "%s: Link DOWN\n", enic->netdev->name);
 424                 netif_carrier_off(enic->netdev);
 425         }
 426 }
 427
 428 static void enic_mtu_check(struct enic *enic)
 429 {
 430         u32 mtu = vnic_dev_mtu(enic->vdev);
 431
 432         if (mtu && mtu != enic->port_mtu) {
 433                 enic->port_mtu = mtu;
 434                 if (mtu < enic->netdev->mtu)
 435                         printk(KERN_WARNING PFX
 436                                 "%s: interface MTU (%d) set higher "
 437                                 "than switch port MTU (%d)\n",
 438                                 enic->netdev->name, enic->netdev->mtu, mtu);
 439         }
 440 }
 441
 442 static void enic_msglvl_check(struct enic *enic)
 443 {
 444         u32 msg_enable = vnic_dev_msg_lvl(enic->vdev);
 445
 446         if (msg_enable != enic->msg_enable) {
 447                 printk(KERN_INFO PFX "%s: msg lvl changed from 0x%x to 0x%x\n",
 448                         enic->netdev->name, enic->msg_enable, msg_enable);
 449                 enic->msg_enable = msg_enable;
 450         }
 451 }
 452
 453 static void enic_notify_check(struct enic *enic)
 454 {
 455         enic_msglvl_check(enic);
 456         enic_mtu_check(enic);
 457         enic_link_check(enic);
 458 }
 459
 460 #define ENIC_TEST_INTR(pba, i) (pba & (1 << i))
 461
 462 static irqreturn_t enic_isr_legacy(int irq, void *data)
 463 {
 464         struct net_device *netdev = data;
 465         struct enic *enic = netdev_priv(netdev);
 466         u32 pba;
 467
 468         vnic_intr_mask(&enic->intr[ENIC_INTX_WQ_RQ]);
 469
 470         pba = vnic_intr_legacy_pba(enic->legacy_pba);
 471         if (!pba) {
 472                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 473                 return IRQ_NONE;        /* not our interrupt */
 474         }
 475
 476         if (ENIC_TEST_INTR(pba, ENIC_INTX_NOTIFY)) {
 477                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_NOTIFY]);
 478                 enic_notify_check(enic);
 479         }
 480
 481         if (ENIC_TEST_INTR(pba, ENIC_INTX_ERR)) {
 482                 vnic_intr_return_all_credits(&enic->intr[ENIC_INTX_ERR]);
 483                 enic_log_q_error(enic);
 484                 /* schedule recovery from WQ/RQ error */
 485                 schedule_work(&enic->reset);
 486                 return IRQ_HANDLED;
 487         }
 488
 489         if (ENIC_TEST_INTR(pba, ENIC_INTX_WQ_RQ)) {
 490                 if (napi_schedule_prep(&enic->napi))
 491                         __napi_schedule(&enic->napi);
 492         } else {
 493                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
 494         }
 495
 496         return IRQ_HANDLED;
 497 }
 498
 499 static irqreturn_t enic_isr_msi(int irq, void *data)
 500 {
 501         struct enic *enic = data;
 502
 503         /* With MSI, there is no sharing of interrupts, so this is
 504          * our interrupt and there is no need to ack it.  The device
 505          * is not providing per-vector masking, so the OS will not
 506          * write to PCI config space to mask/unmask the interrupt.
 507          * We're using mask_on_assertion for MSI, so the device
 508          * automatically masks the interrupt when the interrupt is
 509          * generated.  Later, when exiting polling, the interrupt
 510          * will be unmasked (see enic_poll).
 511          *
 512          * Also, the device uses the same PCIe Traffic Class (TC)
 513          * for Memory Write data and MSI, so there are no ordering
 514          * issues; the MSI will always arrive at the Root Complex
 515          * _after_ corresponding Memory Writes (i.e. descriptor
 516          * writes).
 517          */
 518
 519         napi_schedule(&enic->napi);
 520
 521         return IRQ_HANDLED;
 522 }
 523
 524 static irqreturn_t enic_isr_msix_rq(int irq, void *data)
 525 {
 526         struct enic *enic = data;
 527
 528         /* schedule NAPI polling for RQ cleanup */
 529         napi_schedule(&enic->napi);
 530
 531         return IRQ_HANDLED;
 532 }
 533
 534 static irqreturn_t enic_isr_msix_wq(int irq, void *data)
 535 {
 536         struct enic *enic = data;
 537         unsigned int wq_work_to_do = -1; /* no limit */
 538         unsigned int wq_work_done;
 539
 540         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
 541                 wq_work_to_do, enic_wq_service, NULL);
 542
 543         vnic_intr_return_credits(&enic->intr[ENIC_MSIX_WQ],
 544                 wq_work_done,
 545                 1 /* unmask intr */,
 546                 1 /* reset intr timer */);
 547
 548         return IRQ_HANDLED;
 549 }
 550
 551 static irqreturn_t enic_isr_msix_err(int irq, void *data)
 552 {
 553         struct enic *enic = data;
 554
 555         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_ERR]);
 556
 557         enic_log_q_error(enic);
 558
 559         /* schedule recovery from WQ/RQ error */
 560         schedule_work(&enic->reset);
 561
 562         return IRQ_HANDLED;
 563 }
 564
 565 static irqreturn_t enic_isr_msix_notify(int irq, void *data)
 566 {
 567         struct enic *enic = data;
 568
 569         vnic_intr_return_all_credits(&enic->intr[ENIC_MSIX_NOTIFY]);
 570         enic_notify_check(enic);
 571
 572         return IRQ_HANDLED;
 573 }
 574
 575 static inline void enic_queue_wq_skb_cont(struct enic *enic,
 576         struct vnic_wq *wq, struct sk_buff *skb,
 577         unsigned int len_left)
 578 {
 579         skb_frag_t *frag;
 580
 581         /* Queue additional data fragments */
 582         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 583                 len_left -= frag->size;
 584                 enic_queue_wq_desc_cont(wq, skb,
 585                         pci_map_page(enic->pdev, frag->page,
 586                                 frag->page_offset, frag->size,
 587                                 PCI_DMA_TODEVICE),
 588                         frag->size,
 589                         (len_left == 0));       /* EOP? */
 590         }
 591 }
 592
 593 static inline void enic_queue_wq_skb_vlan(struct enic *enic,
 594         struct vnic_wq *wq, struct sk_buff *skb,
 595         int vlan_tag_insert, unsigned int vlan_tag)
 596 {
 597         unsigned int head_len = skb_headlen(skb);
 598         unsigned int len_left = skb->len - head_len;
 599         int eop = (len_left == 0);
 600
 601         /* Queue the main skb fragment. The fragments are no larger
 602          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 603          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 604          * per fragment is queued.
 605          */
 606         enic_queue_wq_desc(wq, skb,
 607                 pci_map_single(enic->pdev, skb->data,
 608                         head_len, PCI_DMA_TODEVICE),
 609                 head_len,
 610                 vlan_tag_insert, vlan_tag,
 611                 eop);
 612
 613         if (!eop)
 614                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 615 }
 616
 617 static inline void enic_queue_wq_skb_csum_l4(struct enic *enic,
 618         struct vnic_wq *wq, struct sk_buff *skb,
 619         int vlan_tag_insert, unsigned int vlan_tag)
 620 {
 621         unsigned int head_len = skb_headlen(skb);
 622         unsigned int len_left = skb->len - head_len;
 623         unsigned int hdr_len = skb_transport_offset(skb);
 624         unsigned int csum_offset = hdr_len + skb->csum_offset;
 625         int eop = (len_left == 0);
 626
 627         /* Queue the main skb fragment. The fragments are no larger
 628          * than max MTU(9000)+ETH_HDR_LEN(14) bytes, which is less
 629          * than WQ_ENET_MAX_DESC_LEN length. So only one descriptor
 630          * per fragment is queued.
 631          */
 632         enic_queue_wq_desc_csum_l4(wq, skb,
 633                 pci_map_single(enic->pdev, skb->data,
 634                         head_len, PCI_DMA_TODEVICE),
 635                 head_len,
 636                 csum_offset,
 637                 hdr_len,
 638                 vlan_tag_insert, vlan_tag,
 639                 eop);
 640
 641         if (!eop)
 642                 enic_queue_wq_skb_cont(enic, wq, skb, len_left);
 643 }
 644
 645 static inline void enic_queue_wq_skb_tso(struct enic *enic,
 646         struct vnic_wq *wq, struct sk_buff *skb, unsigned int mss,
 647         int vlan_tag_insert, unsigned int vlan_tag)
 648 {
 649         unsigned int frag_len_left = skb_headlen(skb);
 650         unsigned int len_left = skb->len - frag_len_left;
 651         unsigned int hdr_len = skb_transport_offset(skb) + tcp_hdrlen(skb);
 652         int eop = (len_left == 0);
 653         unsigned int len;
 654         dma_addr_t dma_addr;
 655         unsigned int offset = 0;
 656         skb_frag_t *frag;
 657
 658         /* Preload TCP csum field with IP pseudo hdr calculated
 659          * with IP length set to zero.  HW will later add in length
 660          * to each TCP segment resulting from the TSO.
 661          */
 662
 663         if (skb->protocol == cpu_to_be16(ETH_P_IP)) {
 664                 ip_hdr(skb)->check = 0;
 665                 tcp_hdr(skb)->check = ~csum_tcpudp_magic(ip_hdr(skb)->saddr,
 666                         ip_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 667         } else if (skb->protocol == cpu_to_be16(ETH_P_IPV6)) {
 668                 tcp_hdr(skb)->check = ~csum_ipv6_magic(&ipv6_hdr(skb)->saddr,
 669                         &ipv6_hdr(skb)->daddr, 0, IPPROTO_TCP, 0);
 670         }
 671
 672         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 673          * for the main skb fragment
 674          */
 675         while (frag_len_left) {
 676                 len = min(frag_len_left, (unsigned int)WQ_ENET_MAX_DESC_LEN);
 677                 dma_addr = pci_map_single(enic->pdev, skb->data + offset,
 678                                 len, PCI_DMA_TODEVICE);
 679                 enic_queue_wq_desc_tso(wq, skb,
 680                         dma_addr,
 681                         len,
 682                         mss, hdr_len,
 683                         vlan_tag_insert, vlan_tag,
 684                         eop && (len == frag_len_left));
 685                 frag_len_left -= len;
 686                 offset += len;
 687         }
 688
 689         if (eop)
 690                 return;
 691
 692         /* Queue WQ_ENET_MAX_DESC_LEN length descriptors
 693          * for additional data fragments
 694          */
 695         for (frag = skb_shinfo(skb)->frags; len_left; frag++) {
 696                 len_left -= frag->size;
 697                 frag_len_left = frag->size;
 698                 offset = frag->page_offset;
 699
 700                 while (frag_len_left) {
 701                         len = min(frag_len_left,
 702                                 (unsigned int)WQ_ENET_MAX_DESC_LEN);
 703                         dma_addr = pci_map_page(enic->pdev, frag->page,
 704                                 offset, len,
 705                                 PCI_DMA_TODEVICE);
 706                         enic_queue_wq_desc_cont(wq, skb,
 707                                 dma_addr,
 708                                 len,
 709                                 (len_left == 0) &&
 710                                 (len == frag_len_left));        /* EOP? */
 711                         frag_len_left -= len;
 712                         offset += len;
 713                 }
 714         }
 715 }
 716
 717 static inline void enic_queue_wq_skb(struct enic *enic,
 718         struct vnic_wq *wq, struct sk_buff *skb)
 719 {
 720         unsigned int mss = skb_shinfo(skb)->gso_size;
 721         unsigned int vlan_tag = 0;
 722         int vlan_tag_insert = 0;
 723
 724         if (enic->vlan_group && vlan_tx_tag_present(skb)) {
 725                 /* VLAN tag from trunking driver */
 726                 vlan_tag_insert = 1;
 727                 vlan_tag = vlan_tx_tag_get(skb);
 728         }
 729
 730         if (mss)
 731                 enic_queue_wq_skb_tso(enic, wq, skb, mss,
 732                         vlan_tag_insert, vlan_tag);
 733         else if (skb->ip_summed == CHECKSUM_PARTIAL)
 734                 enic_queue_wq_skb_csum_l4(enic, wq, skb,
 735                         vlan_tag_insert, vlan_tag);
 736         else
 737                 enic_queue_wq_skb_vlan(enic, wq, skb,
 738                         vlan_tag_insert, vlan_tag);
 739 }
 740
 741 /* netif_tx_lock held, process context with BHs disabled, or BH */
 742 static netdev_tx_t enic_hard_start_xmit(struct sk_buff *skb,
 743         struct net_device *netdev)
 744 {
 745         struct enic *enic = netdev_priv(netdev);
 746         struct vnic_wq *wq = &enic->wq[0];
 747         unsigned long flags;
 748
 749         if (skb->len <= 0) {
 750                 dev_kfree_skb(skb);
 751                 return NETDEV_TX_OK;
 752         }
 753
 754         /* Non-TSO sends must fit within ENIC_NON_TSO_MAX_DESC descs,
 755          * which is very likely.  In the off chance it's going to take
 756          * more than * ENIC_NON_TSO_MAX_DESC, linearize the skb.
 757          */
 758
 759         if (skb_shinfo(skb)->gso_size == 0 &&
 760             skb_shinfo(skb)->nr_frags + 1 > ENIC_NON_TSO_MAX_DESC &&
 761             skb_linearize(skb)) {
 762                 dev_kfree_skb(skb);
 763                 return NETDEV_TX_OK;
 764         }
 765
 766         spin_lock_irqsave(&enic->wq_lock[0], flags);
 767
 768         if (vnic_wq_desc_avail(wq) <
 769             skb_shinfo(skb)->nr_frags + ENIC_DESC_MAX_SPLITS) {
 770                 netif_stop_queue(netdev);
 771                 /* This is a hard error, log it */
 772                 printk(KERN_ERR PFX "%s: BUG! Tx ring full when "
 773                         "queue awake!\n", netdev->name);
 774                 spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 775                 return NETDEV_TX_BUSY;
 776         }
 777
 778         enic_queue_wq_skb(enic, wq, skb);
 779
 780         if (vnic_wq_desc_avail(wq) < MAX_SKB_FRAGS + ENIC_DESC_MAX_SPLITS)
 781                 netif_stop_queue(netdev);
 782
 783         spin_unlock_irqrestore(&enic->wq_lock[0], flags);
 784
 785         return NETDEV_TX_OK;
 786 }
 787
 788 /* dev_base_lock rwlock held, nominally process context */
 789 static struct net_device_stats *enic_get_stats(struct net_device *netdev)
 790 {
 791         struct enic *enic = netdev_priv(netdev);
 792         struct net_device_stats *net_stats = &netdev->stats;
 793         struct vnic_stats *stats;
 794
 795         spin_lock(&enic->devcmd_lock);
 796         vnic_dev_stats_dump(enic->vdev, &stats);
 797         spin_unlock(&enic->devcmd_lock);
 798
 799         net_stats->tx_packets = stats->tx.tx_frames_ok;
 800         net_stats->tx_bytes = stats->tx.tx_bytes_ok;
 801         net_stats->tx_errors = stats->tx.tx_errors;
 802         net_stats->tx_dropped = stats->tx.tx_drops;
 803
 804         net_stats->rx_packets = stats->rx.rx_frames_ok;
 805         net_stats->rx_bytes = stats->rx.rx_bytes_ok;
 806         net_stats->rx_errors = stats->rx.rx_errors;
 807         net_stats->multicast = stats->rx.rx_multicast_frames_ok;
 808         net_stats->rx_over_errors = enic->rq_truncated_pkts;
 809         net_stats->rx_crc_errors = enic->rq_bad_fcs;
 810         net_stats->rx_dropped = stats->rx.rx_no_bufs + stats->rx.rx_drop;
 811
 812         return net_stats;
 813 }
 814
 815 static void enic_reset_mcaddrs(struct enic *enic)
 816 {
 817         enic->mc_count = 0;
 818 }
 819
 820 static int enic_set_mac_addr(struct net_device *netdev, char *addr)
 821 {
 822         struct enic *enic = netdev_priv(netdev);
 823
 824         if (enic_is_dynamic(enic)) {
 825                 if (!is_valid_ether_addr(addr) && !is_zero_ether_addr(addr))
 826                         return -EADDRNOTAVAIL;
 827         } else {
 828                 if (!is_valid_ether_addr(addr))
 829                         return -EADDRNOTAVAIL;
 830         }
 831
 832         memcpy(netdev->dev_addr, addr, netdev->addr_len);
 833
 834         return 0;
 835 }
 836
 837 static int enic_dev_add_station_addr(struct enic *enic)
 838 {
 839         int err = 0;
 840
 841         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 842                 spin_lock(&enic->devcmd_lock);
 843                 err = vnic_dev_add_addr(enic->vdev, enic->netdev->dev_addr);
 844                 spin_unlock(&enic->devcmd_lock);
 845         }
 846
 847         return err;
 848 }
 849
 850 static int enic_dev_del_station_addr(struct enic *enic)
 851 {
 852         int err = 0;
 853
 854         if (is_valid_ether_addr(enic->netdev->dev_addr)) {
 855                 spin_lock(&enic->devcmd_lock);
 856                 err = vnic_dev_del_addr(enic->vdev, enic->netdev->dev_addr);
 857                 spin_unlock(&enic->devcmd_lock);
 858         }
 859
 860         return err;
 861 }
 862
 863 static int enic_set_mac_address_dynamic(struct net_device *netdev, void *p)
 864 {
 865         struct enic *enic = netdev_priv(netdev);
 866         struct sockaddr *saddr = p;
 867         char *addr = saddr->sa_data;
 868         int err;
 869
 870         if (netif_running(enic->netdev)) {
 871                 err = enic_dev_del_station_addr(enic);
 872                 if (err)
 873                         return err;
 874         }
 875
 876         err = enic_set_mac_addr(netdev, addr);
 877         if (err)
 878                 return err;
 879
 880         if (netif_running(enic->netdev)) {
 881                 err = enic_dev_add_station_addr(enic);
 882                 if (err)
 883                         return err;
 884         }
 885
 886         return err;
 887 }
 888
 889 static int enic_set_mac_address(struct net_device *netdev, void *p)
 890 {
 891         return -EOPNOTSUPP;
 892 }
 893
 894 /* netif_tx_lock held, BHs disabled */
 895 static void enic_set_multicast_list(struct net_device *netdev)
 896 {
 897         struct enic *enic = netdev_priv(netdev);
 898         struct netdev_hw_addr *ha;
 899         int directed = 1;
 900         int multicast = (netdev->flags & IFF_MULTICAST) ? 1 : 0;
 901         int broadcast = (netdev->flags & IFF_BROADCAST) ? 1 : 0;
 902         int promisc = (netdev->flags & IFF_PROMISC) ? 1 : 0;
 903         unsigned int mc_count = netdev_mc_count(netdev);
 904         int allmulti = (netdev->flags & IFF_ALLMULTI) ||
 905                 mc_count > ENIC_MULTICAST_PERFECT_FILTERS;
 906         unsigned int flags = netdev->flags | (allmulti ? IFF_ALLMULTI : 0);
 907         u8 mc_addr[ENIC_MULTICAST_PERFECT_FILTERS][ETH_ALEN];
 908         unsigned int i, j;
 909
 910         if (mc_count > ENIC_MULTICAST_PERFECT_FILTERS)
 911                 mc_count = ENIC_MULTICAST_PERFECT_FILTERS;
 912
 913         spin_lock(&enic->devcmd_lock);
 914
 915         if (enic->flags != flags) {
 916                 enic->flags = flags;
 917                 vnic_dev_packet_filter(enic->vdev, directed,
 918                         multicast, broadcast, promisc, allmulti);
 919         }
 920
 921         /* Is there an easier way?  Trying to minimize to
 922          * calls to add/del multicast addrs.  We keep the
 923          * addrs from the last call in enic->mc_addr and
 924          * look for changes to add/del.
 925          */
 926
 927         i = 0;
 928         netdev_for_each_mc_addr(ha, netdev) {
 929                 if (i == mc_count)
 930                         break;
 931                 memcpy(mc_addr[i++], ha->addr, ETH_ALEN);
 932         }
 933
 934         for (i = 0; i < enic->mc_count; i++) {
 935                 for (j = 0; j < mc_count; j++)
 936                         if (compare_ether_addr(enic->mc_addr[i],
 937                                 mc_addr[j]) == 0)
 938                                 break;
 939                 if (j == mc_count)
 940                         enic_del_multicast_addr(enic, enic->mc_addr[i]);
 941         }
 942
 943         for (i = 0; i < mc_count; i++) {
 944                 for (j = 0; j < enic->mc_count; j++)
 945                         if (compare_ether_addr(mc_addr[i],
 946                                 enic->mc_addr[j]) == 0)
 947                                 break;
 948                 if (j == enic->mc_count)
 949                         enic_add_multicast_addr(enic, mc_addr[i]);
 950         }
 951
 952         /* Save the list to compare against next time
 953          */
 954
 955         for (i = 0; i < mc_count; i++)
 956                 memcpy(enic->mc_addr[i], mc_addr[i], ETH_ALEN);
 957
 958         enic->mc_count = mc_count;
 959
 960         spin_unlock(&enic->devcmd_lock);
 961 }
 962
 963 /* rtnl lock is held */
 964 static void enic_vlan_rx_register(struct net_device *netdev,
 965         struct vlan_group *vlan_group)
 966 {
 967         struct enic *enic = netdev_priv(netdev);
 968         enic->vlan_group = vlan_group;
 969 }
 970
 971 /* rtnl lock is held */
 972 static void enic_vlan_rx_add_vid(struct net_device *netdev, u16 vid)
 973 {
 974         struct enic *enic = netdev_priv(netdev);
 975
 976         spin_lock(&enic->devcmd_lock);
 977         enic_add_vlan(enic, vid);
 978         spin_unlock(&enic->devcmd_lock);
 979 }
 980
 981 /* rtnl lock is held */
 982 static void enic_vlan_rx_kill_vid(struct net_device *netdev, u16 vid)
 983 {
 984         struct enic *enic = netdev_priv(netdev);
 985
 986         spin_lock(&enic->devcmd_lock);
 987         enic_del_vlan(enic, vid);
 988         spin_unlock(&enic->devcmd_lock);
 989 }
 990
 991 /* netif_tx_lock held, BHs disabled */
 992 static void enic_tx_timeout(struct net_device *netdev)
 993 {
 994         struct enic *enic = netdev_priv(netdev);
 995         schedule_work(&enic->reset);
 996 }
 997
 998 static int enic_vnic_dev_deinit(struct enic *enic)
 999 {
1000         int err;
1001
1002         spin_lock(&enic->devcmd_lock);
1003         err = vnic_dev_deinit(enic->vdev);
1004         spin_unlock(&enic->devcmd_lock);
1005
1006         return err;
1007 }
1008
1009 static int enic_dev_init_prov(struct enic *enic, struct vic_provinfo *vp)
1010 {
1011         int err;
1012
1013         spin_lock(&enic->devcmd_lock);
1014         err = vnic_dev_init_prov(enic->vdev,
1015                 (u8 *)vp, vic_provinfo_size(vp));
1016         spin_unlock(&enic->devcmd_lock);
1017
1018         return err;
1019 }
1020
1021 static int enic_dev_init_done(struct enic *enic, int *done, int *error)
1022 {
1023         int err;
1024
1025         spin_lock(&enic->devcmd_lock);
1026         err = vnic_dev_init_done(enic->vdev, done, error);
1027         spin_unlock(&enic->devcmd_lock);
1028
1029         return err;
1030 }
1031
1032 static int enic_set_port_profile(struct enic *enic, u8 *mac)
1033 {
1034         struct vic_provinfo *vp;
1035         u8 oui[3] = VIC_PROVINFO_CISCO_OUI;
1036         u8 *uuid;
1037         char uuid_str[38];
1038         static char *uuid_fmt = "%02X%02X%02X%02X-%02X%02X-%02X%02X-"
1039                 "%02X%02X-%02X%02X%02X%02X%0X%02X";
1040         int err;
1041
1042         err = enic_vnic_dev_deinit(enic);
1043         if (err)
1044                 return err;
1045
1046         switch (enic->pp.request) {
1047
1048         case PORT_REQUEST_ASSOCIATE:
1049
1050                 if (!(enic->pp.set & ENIC_SET_NAME) || !strlen(enic->pp.name))
1051                         return -EINVAL;
1052
1053                 if (!is_valid_ether_addr(mac))
1054                         return -EADDRNOTAVAIL;
1055
1056                 vp = vic_provinfo_alloc(GFP_KERNEL, oui,
1057                         VIC_PROVINFO_LINUX_TYPE);
1058                 if (!vp)
1059                         return -ENOMEM;
1060
1061                 vic_provinfo_add_tlv(vp,
1062                         VIC_LINUX_PROV_TLV_PORT_PROFILE_NAME_STR,
1063                         strlen(enic->pp.name) + 1, enic->pp.name);
1064
1065                 vic_provinfo_add_tlv(vp,
1066                         VIC_LINUX_PROV_TLV_CLIENT_MAC_ADDR,
1067                         ETH_ALEN, mac);
1068
1069                 if (enic->pp.set & ENIC_SET_INSTANCE) {
1070                         uuid = enic->pp.instance_uuid;
1071                         sprintf(uuid_str, uuid_fmt,
1072                                 uuid[0],  uuid[1],  uuid[2],  uuid[3],
1073                                 uuid[4],  uuid[5],  uuid[6],  uuid[7],
1074                                 uuid[8],  uuid[9],  uuid[10], uuid[11],
1075                                 uuid[12], uuid[13], uuid[14], uuid[15]);
1076                         vic_provinfo_add_tlv(vp,
1077                                 VIC_LINUX_PROV_TLV_CLIENT_UUID_STR,
1078                                 sizeof(uuid_str), uuid_str);
1079                 }
1080
1081                 if (enic->pp.set & ENIC_SET_HOST) {
1082                         uuid = enic->pp.host_uuid;
1083                         sprintf(uuid_str, uuid_fmt,
1084                                 uuid[0],  uuid[1],  uuid[2],  uuid[3],
1085                                 uuid[4],  uuid[5],  uuid[6],  uuid[7],
1086                                 uuid[8],  uuid[9],  uuid[10], uuid[11],
1087                                 uuid[12], uuid[13], uuid[14], uuid[15]);
1088                         vic_provinfo_add_tlv(vp,
1089                                 VIC_LINUX_PROV_TLV_HOST_UUID_STR,
1090                                 sizeof(uuid_str), uuid_str);
1091                 }
1092
1093                 err = enic_dev_init_prov(enic, vp);
1094                 vic_provinfo_free(vp);
1095                 if (err)
1096                         return err;
1097                 break;
1098
1099         case PORT_REQUEST_DISASSOCIATE:
1100                 break;
1101
1102         default:
1103                 return -EINVAL;
1104         }
1105
1106         enic->pp.set |= ENIC_SET_APPLIED;
1107         return 0;
1108 }
1109
1110 static int enic_set_vf_port(struct net_device *netdev, int vf,
1111         struct nlattr *port[])
1112 {
1113         struct enic *enic = netdev_priv(netdev);
1114
1115         memset(&enic->pp, 0, sizeof(enic->pp));
1116
1117         if (port[IFLA_PORT_REQUEST]) {
1118                 enic->pp.set |= ENIC_SET_REQUEST;
1119                 enic->pp.request = nla_get_u8(port[IFLA_PORT_REQUEST]);
1120         }
1121
1122         if (port[IFLA_PORT_PROFILE]) {
1123                 enic->pp.set |= ENIC_SET_NAME;
1124                 memcpy(enic->pp.name, nla_data(port[IFLA_PORT_PROFILE]),
1125                         PORT_PROFILE_MAX);
1126         }
1127
1128         if (port[IFLA_PORT_INSTANCE_UUID]) {
1129                 enic->pp.set |= ENIC_SET_INSTANCE;
1130                 memcpy(enic->pp.instance_uuid,
1131                         nla_data(port[IFLA_PORT_INSTANCE_UUID]), PORT_UUID_MAX);
1132         }
1133
1134         if (port[IFLA_PORT_HOST_UUID]) {
1135                 enic->pp.set |= ENIC_SET_HOST;
1136                 memcpy(enic->pp.host_uuid,
1137                         nla_data(port[IFLA_PORT_HOST_UUID]), PORT_UUID_MAX);
1138         }
1139
1140         /* don't support VFs, yet */
1141         if (vf != PORT_SELF_VF)
1142                 return -EOPNOTSUPP;
1143
1144         if (!(enic->pp.set & ENIC_SET_REQUEST))
1145                 return -EOPNOTSUPP;
1146
1147         if (enic->pp.request == PORT_REQUEST_ASSOCIATE) {
1148
1149                 /* If the interface mac addr hasn't been assigned,
1150                  * assign a random mac addr before setting port-
1151                  * profile.
1152                  */
1153
1154                 if (is_zero_ether_addr(netdev->dev_addr))
1155                         random_ether_addr(netdev->dev_addr);
1156         }
1157
1158         return enic_set_port_profile(enic, netdev->dev_addr);
1159 }
1160
1161 static int enic_get_vf_port(struct net_device *netdev, int vf,
1162         struct sk_buff *skb)
1163 {
1164         struct enic *enic = netdev_priv(netdev);
1165         int err, error, done;
1166         u16 response = PORT_PROFILE_RESPONSE_SUCCESS;
1167
1168         if (!(enic->pp.set & ENIC_SET_APPLIED))
1169                 return -ENODATA;
1170
1171         err = enic_dev_init_done(enic, &done, &error);
1172         if (err)
1173                 error = err;
1174
1175         switch (error) {
1176         case ERR_SUCCESS:
1177                 if (!done)
1178                         response = PORT_PROFILE_RESPONSE_INPROGRESS;
1179                 break;
1180         case ERR_EINVAL:
1181                 response = PORT_PROFILE_RESPONSE_INVALID;
1182                 break;
1183         case ERR_EBADSTATE:
1184                 response = PORT_PROFILE_RESPONSE_BADSTATE;
1185                 break;
1186         case ERR_ENOMEM:
1187                 response = PORT_PROFILE_RESPONSE_INSUFFICIENT_RESOURCES;
1188                 break;
1189         default:
1190                 response = PORT_PROFILE_RESPONSE_ERROR;
1191                 break;
1192         }
1193
1194         NLA_PUT_U16(skb, IFLA_PORT_REQUEST, enic->pp.request);
1195         NLA_PUT_U16(skb, IFLA_PORT_RESPONSE, response);
1196         if (enic->pp.set & ENIC_SET_NAME)
1197                 NLA_PUT(skb, IFLA_PORT_PROFILE, PORT_PROFILE_MAX,
1198                         enic->pp.name);
1199         if (enic->pp.set & ENIC_SET_INSTANCE)
1200                 NLA_PUT(skb, IFLA_PORT_INSTANCE_UUID, PORT_UUID_MAX,
1201                         enic->pp.instance_uuid);
1202         if (enic->pp.set & ENIC_SET_HOST)
1203                 NLA_PUT(skb, IFLA_PORT_HOST_UUID, PORT_UUID_MAX,
1204                         enic->pp.host_uuid);
1205
1206         return 0;
1207
1208 nla_put_failure:
1209         return -EMSGSIZE;
1210 }
1211
1212 static void enic_free_rq_buf(struct vnic_rq *rq, struct vnic_rq_buf *buf)
1213 {
1214         struct enic *enic = vnic_dev_priv(rq->vdev);
1215
1216         if (!buf->os_buf)
1217                 return;
1218
1219         pci_unmap_single(enic->pdev, buf->dma_addr,
1220                 buf->len, PCI_DMA_FROMDEVICE);
1221         dev_kfree_skb_any(buf->os_buf);
1222 }
1223
1224 static int enic_rq_alloc_buf(struct vnic_rq *rq)
1225 {
1226         struct enic *enic = vnic_dev_priv(rq->vdev);
1227         struct net_device *netdev = enic->netdev;
1228         struct sk_buff *skb;
1229         unsigned int len = netdev->mtu + ETH_HLEN;
1230         unsigned int os_buf_index = 0;
1231         dma_addr_t dma_addr;
1232
1233         skb = netdev_alloc_skb_ip_align(netdev, len);
1234         if (!skb)
1235                 return -ENOMEM;
1236
1237         dma_addr = pci_map_single(enic->pdev, skb->data,
1238                 len, PCI_DMA_FROMDEVICE);
1239
1240         enic_queue_rq_desc(rq, skb, os_buf_index,
1241                 dma_addr, len);
1242
1243         return 0;
1244 }
1245
1246 static int enic_rq_alloc_buf_a1(struct vnic_rq *rq)
1247 {
1248         struct rq_enet_desc *desc = vnic_rq_next_desc(rq);
1249
1250         if (vnic_rq_posting_soon(rq)) {
1251
1252                 /* SW workaround for A0 HW erratum: if we're just about
1253                  * to write posted_index, insert a dummy desc
1254                  * of type resvd
1255                  */
1256
1257                 rq_enet_desc_enc(desc, 0, RQ_ENET_TYPE_RESV2, 0);
1258                 vnic_rq_post(rq, 0, 0, 0, 0);
1259         } else {
1260                 return enic_rq_alloc_buf(rq);
1261         }
1262
1263         return 0;
1264 }
1265
1266 static int enic_set_rq_alloc_buf(struct enic *enic)
1267 {
1268         enum vnic_dev_hw_version hw_ver;
1269         int err;
1270
1271         err = vnic_dev_hw_version(enic->vdev, &hw_ver);
1272         if (err)
1273                 return err;
1274
1275         switch (hw_ver) {
1276         case VNIC_DEV_HW_VER_A1:
1277                 enic->rq_alloc_buf = enic_rq_alloc_buf_a1;
1278                 break;
1279         case VNIC_DEV_HW_VER_A2:
1280         case VNIC_DEV_HW_VER_UNKNOWN:
1281                 enic->rq_alloc_buf = enic_rq_alloc_buf;
1282                 break;
1283         default:
1284                 return -ENODEV;
1285         }
1286
1287         return 0;
1288 }
1289
1290 static int enic_get_skb_header(struct sk_buff *skb, void **iphdr,
1291         void **tcph, u64 *hdr_flags, void *priv)
1292 {
1293         struct cq_enet_rq_desc *cq_desc = priv;
1294         unsigned int ip_len;
1295         struct iphdr *iph;
1296
1297         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1298         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1299         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1300         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1301         u8 packet_error;
1302         u16 q_number, completed_index, bytes_written, vlan, checksum;
1303         u32 rss_hash;
1304
1305         cq_enet_rq_desc_dec(cq_desc,
1306                 &type, &color, &q_number, &completed_index,
1307                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1308                 &csum_not_calc, &rss_hash, &bytes_written,
1309                 &packet_error, &vlan_stripped, &vlan, &checksum,
1310                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1311                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1312                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1313                 &fcs_ok);
1314
1315         if (!(ipv4 && tcp && !ipv4_fragment))
1316                 return -1;
1317
1318         skb_reset_network_header(skb);
1319         iph = ip_hdr(skb);
1320
1321         ip_len = ip_hdrlen(skb);
1322         skb_set_transport_header(skb, ip_len);
1323
1324         /* check if ip header and tcp header are complete */
1325         if (ntohs(iph->tot_len) < ip_len + tcp_hdrlen(skb))
1326                 return -1;
1327
1328         *hdr_flags = LRO_IPV4 | LRO_TCP;
1329         *tcph = tcp_hdr(skb);
1330         *iphdr = iph;
1331
1332         return 0;
1333 }
1334
1335 static void enic_rq_indicate_buf(struct vnic_rq *rq,
1336         struct cq_desc *cq_desc, struct vnic_rq_buf *buf,
1337         int skipped, void *opaque)
1338 {
1339         struct enic *enic = vnic_dev_priv(rq->vdev);
1340         struct net_device *netdev = enic->netdev;
1341         struct sk_buff *skb;
1342
1343         u8 type, color, eop, sop, ingress_port, vlan_stripped;
1344         u8 fcoe, fcoe_sof, fcoe_fc_crc_ok, fcoe_enc_error, fcoe_eof;
1345         u8 tcp_udp_csum_ok, udp, tcp, ipv4_csum_ok;
1346         u8 ipv6, ipv4, ipv4_fragment, fcs_ok, rss_type, csum_not_calc;
1347         u8 packet_error;
1348         u16 q_number, completed_index, bytes_written, vlan, checksum;
1349         u32 rss_hash;
1350
1351         if (skipped)
1352                 return;
1353
1354         skb = buf->os_buf;
1355         prefetch(skb->data - NET_IP_ALIGN);
1356         pci_unmap_single(enic->pdev, buf->dma_addr,
1357                 buf->len, PCI_DMA_FROMDEVICE);
1358
1359         cq_enet_rq_desc_dec((struct cq_enet_rq_desc *)cq_desc,
1360                 &type, &color, &q_number, &completed_index,
1361                 &ingress_port, &fcoe, &eop, &sop, &rss_type,
1362                 &csum_not_calc, &rss_hash, &bytes_written,
1363                 &packet_error, &vlan_stripped, &vlan, &checksum,
1364                 &fcoe_sof, &fcoe_fc_crc_ok, &fcoe_enc_error,
1365                 &fcoe_eof, &tcp_udp_csum_ok, &udp, &tcp,
1366                 &ipv4_csum_ok, &ipv6, &ipv4, &ipv4_fragment,
1367                 &fcs_ok);
1368
1369         if (packet_error) {
1370
1371                 if (!fcs_ok) {
1372                         if (bytes_written > 0)
1373                                 enic->rq_bad_fcs++;
1374                         else if (bytes_written == 0)
1375                                 enic->rq_truncated_pkts++;
1376                 }
1377
1378                 dev_kfree_skb_any(skb);
1379
1380                 return;
1381         }
1382
1383         if (eop && bytes_written > 0) {
1384
1385                 /* Good receive
1386                  */
1387
1388                 skb_put(skb, bytes_written);
1389                 skb->protocol = eth_type_trans(skb, netdev);
1390
1391                 if (enic->csum_rx_enabled && !csum_not_calc) {
1392                         skb->csum = htons(checksum);
1393                         skb->ip_summed = CHECKSUM_COMPLETE;
1394                 }
1395
1396                 skb->dev = netdev;
1397
1398                 if (enic->vlan_group && vlan_stripped) {
1399
1400                         if ((netdev->features & NETIF_F_LRO) && ipv4)
1401                                 lro_vlan_hwaccel_receive_skb(&enic->lro_mgr,
1402                                         skb, enic->vlan_group,
1403                                         vlan, cq_desc);
1404                         else
1405                                 vlan_hwaccel_receive_skb(skb,
1406                                         enic->vlan_group, vlan);
1407
1408                 } else {
1409
1410                         if ((netdev->features & NETIF_F_LRO) && ipv4)
1411                                 lro_receive_skb(&enic->lro_mgr, skb, cq_desc);
1412                         else
1413                                 netif_receive_skb(skb);
1414
1415                 }
1416
1417         } else {
1418
1419                 /* Buffer overflow
1420                  */
1421
1422                 dev_kfree_skb_any(skb);
1423         }
1424 }
1425
1426 static int enic_rq_service(struct vnic_dev *vdev, struct cq_desc *cq_desc,
1427         u8 type, u16 q_number, u16 completed_index, void *opaque)
1428 {
1429         struct enic *enic = vnic_dev_priv(vdev);
1430
1431         vnic_rq_service(&enic->rq[q_number], cq_desc,
1432                 completed_index, VNIC_RQ_RETURN_DESC,
1433                 enic_rq_indicate_buf, opaque);
1434
1435         return 0;
1436 }
1437
1438 static int enic_poll(struct napi_struct *napi, int budget)
1439 {
1440         struct enic *enic = container_of(napi, struct enic, napi);
1441         struct net_device *netdev = enic->netdev;
1442         unsigned int rq_work_to_do = budget;
1443         unsigned int wq_work_to_do = -1; /* no limit */
1444         unsigned int  work_done, rq_work_done, wq_work_done;
1445         int err;
1446
1447         /* Service RQ (first) and WQ
1448          */
1449
1450         rq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1451                 rq_work_to_do, enic_rq_service, NULL);
1452
1453         wq_work_done = vnic_cq_service(&enic->cq[ENIC_CQ_WQ],
1454                 wq_work_to_do, enic_wq_service, NULL);
1455
1456         /* Accumulate intr event credits for this polling
1457          * cycle.  An intr event is the completion of a
1458          * a WQ or RQ packet.
1459          */
1460
1461         work_done = rq_work_done + wq_work_done;
1462
1463         if (work_done > 0)
1464                 vnic_intr_return_credits(&enic->intr[ENIC_INTX_WQ_RQ],
1465                         work_done,
1466                         0 /* don't unmask intr */,
1467                         0 /* don't reset intr timer */);
1468
1469         err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1470
1471         /* Buffer allocation failed. Stay in polling
1472          * mode so we can try to fill the ring again.
1473          */
1474
1475         if (err)
1476                 rq_work_done = rq_work_to_do;
1477
1478         if (rq_work_done < rq_work_to_do) {
1479
1480                 /* Some work done, but not enough to stay in polling,
1481                  * flush all LROs and exit polling
1482                  */
1483
1484                 if (netdev->features & NETIF_F_LRO)
1485                         lro_flush_all(&enic->lro_mgr);
1486
1487                 napi_complete(napi);
1488                 vnic_intr_unmask(&enic->intr[ENIC_INTX_WQ_RQ]);
1489         }
1490
1491         return rq_work_done;
1492 }
1493
1494 static int enic_poll_msix(struct napi_struct *napi, int budget)
1495 {
1496         struct enic *enic = container_of(napi, struct enic, napi);
1497         struct net_device *netdev = enic->netdev;
1498         unsigned int work_to_do = budget;
1499         unsigned int work_done;
1500         int err;
1501
1502         /* Service RQ
1503          */
1504
1505         work_done = vnic_cq_service(&enic->cq[ENIC_CQ_RQ],
1506                 work_to_do, enic_rq_service, NULL);
1507
1508         /* Return intr event credits for this polling
1509          * cycle.  An intr event is the completion of a
1510          * RQ packet.
1511          */
1512
1513         if (work_done > 0)
1514                 vnic_intr_return_credits(&enic->intr[ENIC_MSIX_RQ],
1515                         work_done,
1516                         0 /* don't unmask intr */,
1517                         0 /* don't reset intr timer */);
1518
1519         err = vnic_rq_fill(&enic->rq[0], enic->rq_alloc_buf);
1520
1521         /* Buffer allocation failed. Stay in polling mode
1522          * so we can try to fill the ring again.
1523          */
1524
1525         if (err)
1526                 work_done = work_to_do;
1527
1528         if (work_done < work_to_do) {
1529
1530                 /* Some work done, but not enough to stay in polling,
1531                  * flush all LROs and exit polling
1532                  */
1533
1534                 if (netdev->features & NETIF_F_LRO)
1535                         lro_flush_all(&enic->lro_mgr);
1536
1537                 napi_complete(napi);
1538                 vnic_intr_unmask(&enic->intr[ENIC_MSIX_RQ]);
1539         }
1540
1541         return work_done;
1542 }
1543
1544 static void enic_notify_timer(unsigned long data)
1545 {
1546         struct enic *enic = (struct enic *)data;
1547
1548         enic_notify_check(enic);
1549
1550         mod_timer(&enic->notify_timer,
1551                 round_jiffies(jiffies + ENIC_NOTIFY_TIMER_PERIOD));
1552 }
1553
1554 static void enic_free_intr(struct enic *enic)
1555 {
1556         struct net_device *netdev = enic->netdev;
1557         unsigned int i;
1558
1559         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1560         case VNIC_DEV_INTR_MODE_INTX:
1561                 free_irq(enic->pdev->irq, netdev);
1562                 break;
1563         case VNIC_DEV_INTR_MODE_MSI:
1564                 free_irq(enic->pdev->irq, enic);
1565                 break;
1566         case VNIC_DEV_INTR_MODE_MSIX:
1567                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++)
1568                         if (enic->msix[i].requested)
1569                                 free_irq(enic->msix_entry[i].vector,
1570                                         enic->msix[i].devid);
1571                 break;
1572         default:
1573                 break;
1574         }
1575 }
1576
1577 static int enic_request_intr(struct enic *enic)
1578 {
1579         struct net_device *netdev = enic->netdev;
1580         unsigned int i;
1581         int err = 0;
1582
1583         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1584
1585         case VNIC_DEV_INTR_MODE_INTX:
1586
1587                 err = request_irq(enic->pdev->irq, enic_isr_legacy,
1588                         IRQF_SHARED, netdev->name, netdev);
1589                 break;
1590
1591         case VNIC_DEV_INTR_MODE_MSI:
1592
1593                 err = request_irq(enic->pdev->irq, enic_isr_msi,
1594                         0, netdev->name, enic);
1595                 break;
1596
1597         case VNIC_DEV_INTR_MODE_MSIX:
1598
1599                 sprintf(enic->msix[ENIC_MSIX_RQ].devname,
1600                         "%.11s-rx-0", netdev->name);
1601                 enic->msix[ENIC_MSIX_RQ].isr = enic_isr_msix_rq;
1602                 enic->msix[ENIC_MSIX_RQ].devid = enic;
1603
1604                 sprintf(enic->msix[ENIC_MSIX_WQ].devname,
1605                         "%.11s-tx-0", netdev->name);
1606                 enic->msix[ENIC_MSIX_WQ].isr = enic_isr_msix_wq;
1607                 enic->msix[ENIC_MSIX_WQ].devid = enic;
1608
1609                 sprintf(enic->msix[ENIC_MSIX_ERR].devname,
1610                         "%.11s-err", netdev->name);
1611                 enic->msix[ENIC_MSIX_ERR].isr = enic_isr_msix_err;
1612                 enic->msix[ENIC_MSIX_ERR].devid = enic;
1613
1614                 sprintf(enic->msix[ENIC_MSIX_NOTIFY].devname,
1615                         "%.11s-notify", netdev->name);
1616                 enic->msix[ENIC_MSIX_NOTIFY].isr = enic_isr_msix_notify;
1617                 enic->msix[ENIC_MSIX_NOTIFY].devid = enic;
1618
1619                 for (i = 0; i < ARRAY_SIZE(enic->msix); i++) {
1620                         err = request_irq(enic->msix_entry[i].vector,
1621                                 enic->msix[i].isr, 0,
1622                                 enic->msix[i].devname,
1623                                 enic->msix[i].devid);
1624                         if (err) {
1625                                 enic_free_intr(enic);
1626                                 break;
1627                         }
1628                         enic->msix[i].requested = 1;
1629                 }
1630
1631                 break;
1632
1633         default:
1634                 break;
1635         }
1636
1637         return err;
1638 }
1639
1640 static void enic_synchronize_irqs(struct enic *enic)
1641 {
1642         unsigned int i;
1643
1644         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1645         case VNIC_DEV_INTR_MODE_INTX:
1646         case VNIC_DEV_INTR_MODE_MSI:
1647                 synchronize_irq(enic->pdev->irq);
1648                 break;
1649         case VNIC_DEV_INTR_MODE_MSIX:
1650                 for (i = 0; i < enic->intr_count; i++)
1651                         synchronize_irq(enic->msix_entry[i].vector);
1652                 break;
1653         default:
1654                 break;
1655         }
1656 }
1657
1658 static int enic_notify_set(struct enic *enic)
1659 {
1660         int err;
1661
1662         spin_lock(&enic->devcmd_lock);
1663         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1664         case VNIC_DEV_INTR_MODE_INTX:
1665                 err = vnic_dev_notify_set(enic->vdev, ENIC_INTX_NOTIFY);
1666                 break;
1667         case VNIC_DEV_INTR_MODE_MSIX:
1668                 err = vnic_dev_notify_set(enic->vdev, ENIC_MSIX_NOTIFY);
1669                 break;
1670         default:
1671                 err = vnic_dev_notify_set(enic->vdev, -1 /* no intr */);
1672                 break;
1673         }
1674         spin_unlock(&enic->devcmd_lock);
1675
1676         return err;
1677 }
1678
1679 static void enic_notify_timer_start(struct enic *enic)
1680 {
1681         switch (vnic_dev_get_intr_mode(enic->vdev)) {
1682         case VNIC_DEV_INTR_MODE_MSI:
1683                 mod_timer(&enic->notify_timer, jiffies);
1684                 break;
1685         default:
1686                 /* Using intr for notification for INTx/MSI-X */
1687                 break;
1688         };
1689 }
1690
1691 /* rtnl lock is held, process context */
1692 static int enic_open(struct net_device *netdev)
1693 {
1694         struct enic *enic = netdev_priv(netdev);
1695         unsigned int i;
1696         int err;
1697
1698         err = enic_request_intr(enic);
1699         if (err) {
1700                 printk(KERN_ERR PFX "%s: Unable to request irq.\n",
1701                         netdev->name);
1702                 return err;
1703         }
1704
1705         err = enic_notify_set(enic);
1706         if (err) {
1707                 printk(KERN_ERR PFX
1708                         "%s: Failed to alloc notify buffer, aborting.\n",
1709                         netdev->name);
1710                 goto err_out_free_intr;
1711         }
1712
1713         for (i = 0; i < enic->rq_count; i++) {
1714                 vnic_rq_fill(&enic->rq[i], enic->rq_alloc_buf);
1715                 /* Need at least one buffer on ring to get going */
1716                 if (vnic_rq_desc_used(&enic->rq[i]) == 0) {
1717                         printk(KERN_ERR PFX
1718                                 "%s: Unable to alloc receive buffers.\n",
1719                                 netdev->name);
1720                         err = -ENOMEM;
1721                         goto err_out_notify_unset;
1722                 }
1723         }
1724
1725         for (i = 0; i < enic->wq_count; i++)
1726                 vnic_wq_enable(&enic->wq[i]);
1727         for (i = 0; i < enic->rq_count; i++)
1728                 vnic_rq_enable(&enic->rq[i]);
1729
1730         enic_dev_add_station_addr(enic);
1731         enic_set_multicast_list(netdev);
1732
1733         netif_wake_queue(netdev);
1734         napi_enable(&enic->napi);
1735         spin_lock(&enic->devcmd_lock);
1736         vnic_dev_enable(enic->vdev);
1737         spin_unlock(&enic->devcmd_lock);
1738
1739         for (i = 0; i < enic->intr_count; i++)
1740                 vnic_intr_unmask(&enic->intr[i]);
1741
1742         enic_notify_timer_start(enic);
1743
1744         return 0;
1745
1746 err_out_notify_unset:
1747         spin_lock(&enic->devcmd_lock);
1748         vnic_dev_notify_unset(enic->vdev);
1749         spin_unlock(&enic->devcmd_lock);
1750 err_out_free_intr:
1751         enic_free_intr(enic);
1752
1753         return err;
1754 }
1755
1756 /* rtnl lock is held, process context */
1757 static int enic_stop(struct net_device *netdev)
1758 {
1759         struct enic *enic = netdev_priv(netdev);
1760         unsigned int i;
1761         int err;
1762
1763         for (i = 0; i < enic->intr_count; i++)
1764                 vnic_intr_mask(&enic->intr[i]);
1765
1766         enic_synchronize_irqs(enic);
1767
1768         del_timer_sync(&enic->notify_timer);
1769
1770         spin_lock(&enic->devcmd_lock);
1771         vnic_dev_disable(enic->vdev);
1772         spin_unlock(&enic->devcmd_lock);
1773         napi_disable(&enic->napi);
1774         netif_carrier_off(netdev);
1775         netif_tx_disable(netdev);
1776
1777         enic_dev_del_station_addr(enic);
1778
1779         for (i = 0; i < enic->wq_count; i++) {
1780                 err = vnic_wq_disable(&enic->wq[i]);
1781                 if (err)
1782                         return err;
1783         }
1784         for (i = 0; i < enic->rq_count; i++) {
1785                 err = vnic_rq_disable(&enic->rq[i]);
1786                 if (err)
1787                         return err;
1788         }
1789
1790         spin_lock(&enic->devcmd_lock);
1791         vnic_dev_notify_unset(enic->vdev);
1792         spin_unlock(&enic->devcmd_lock);
1793         enic_free_intr(enic);
1794
1795         for (i = 0; i < enic->wq_count; i++)
1796                 vnic_wq_clean(&enic->wq[i], enic_free_wq_buf);
1797         for (i = 0; i < enic->rq_count; i++)
1798                 vnic_rq_clean(&enic->rq[i], enic_free_rq_buf);
1799         for (i = 0; i < enic->cq_count; i++)
1800                 vnic_cq_clean(&enic->cq[i]);
1801         for (i = 0; i < enic->intr_count; i++)
1802                 vnic_intr_clean(&enic->intr[i]);
1803
1804         return 0;
1805 }
1806
1807 static int enic_change_mtu(struct net_device *netdev, int new_mtu)
1808 {
1809         struct enic *enic = netdev_priv(netdev);
1810         int running = netif_running(netdev);
1811
1812         if (new_mtu < ENIC_MIN_MTU || new_mtu > ENIC_MAX_MTU)
1813                 return -EINVAL;
1814
1815         if (running)
1816                 enic_stop(netdev);
1817
1818         netdev->mtu = new_mtu;
1819
1820         if (netdev->mtu > enic->port_mtu)
1821                 printk(KERN_WARNING PFX
1822                         "%s: interface MTU (%d) set higher "
1823                         "than port MTU (%d)\n",
1824                         netdev->name, netdev->mtu, enic->port_mtu);
1825
1826         if (running)
1827                 enic_open(netdev);
1828
1829         return 0;
1830 }
1831
1832 #ifdef CONFIG_NET_POLL_CONTROLLER
1833 static void enic_poll_controller(struct net_device *netdev)
1834 {
1835         struct enic *enic = netdev_priv(netdev);
1836         struct vnic_dev *vdev = enic->vdev;
1837
1838         switch (vnic_dev_get_intr_mode(vdev)) {
1839         case VNIC_DEV_INTR_MODE_MSIX:
1840                 enic_isr_msix_rq(enic->pdev->irq, enic);
1841                 enic_isr_msix_wq(enic->pdev->irq, enic);
1842                 break;
1843         case VNIC_DEV_INTR_MODE_MSI:
1844                 enic_isr_msi(enic->pdev->irq, enic);
1845                 break;
1846         case VNIC_DEV_INTR_MODE_INTX:
1847                 enic_isr_legacy(enic->pdev->irq, netdev);
1848                 break;
1849         default:
1850                 break;
1851         }
1852 }
1853 #endif
1854
1855 static int enic_dev_wait(struct vnic_dev *vdev,
1856         int (*start)(struct vnic_dev *, int),
1857         int (*finished)(struct vnic_dev *, int *),
1858         int arg)
1859 {
1860         unsigned long time;
1861         int done;
1862         int err;
1863
1864         BUG_ON(in_interrupt());
1865
1866         err = start(vdev, arg);
1867         if (err)
1868                 return err;
1869
1870         /* Wait for func to complete...2 seconds max
1871          */
1872
1873         time = jiffies + (HZ * 2);
1874         do {
1875
1876                 err = finished(vdev, &done);
1877                 if (err)
1878                         return err;
1879
1880                 if (done)
1881                         return 0;
1882
1883                 schedule_timeout_uninterruptible(HZ / 10);
1884
1885         } while (time_after(time, jiffies));
1886
1887         return -ETIMEDOUT;
1888 }
1889
1890 static int enic_dev_open(struct enic *enic)
1891 {
1892         int err;
1893
1894         err = enic_dev_wait(enic->vdev, vnic_dev_open,
1895                 vnic_dev_open_done, 0);
1896         if (err)
1897                 printk(KERN_ERR PFX
1898                         "vNIC device open failed, err %d.\n", err);
1899
1900         return err;
1901 }
1902
1903 static int enic_dev_soft_reset(struct enic *enic)
1904 {
1905         int err;
1906
1907         err = enic_dev_wait(enic->vdev, vnic_dev_soft_reset,
1908                 vnic_dev_soft_reset_done, 0);
1909         if (err)
1910                 printk(KERN_ERR PFX
1911                         "vNIC soft reset failed, err %d.\n", err);
1912
1913         return err;
1914 }
1915
1916 static int enic_set_niccfg(struct enic *enic)
1917 {
1918         const u8 rss_default_cpu = 0;
1919         const u8 rss_hash_type = 0;
1920         const u8 rss_hash_bits = 0;
1921         const u8 rss_base_cpu = 0;
1922         const u8 rss_enable = 0;
1923         const u8 tso_ipid_split_en = 0;
1924         const u8 ig_vlan_strip_en = 1;
1925
1926         /* Enable VLAN tag stripping.  RSS not enabled (yet).
1927          */
1928
1929         return enic_set_nic_cfg(enic,
1930                 rss_default_cpu, rss_hash_type,
1931                 rss_hash_bits, rss_base_cpu,
1932                 rss_enable, tso_ipid_split_en,
1933                 ig_vlan_strip_en);
1934 }
1935
1936 static void enic_reset(struct work_struct *work)
1937 {
1938         struct enic *enic = container_of(work, struct enic, reset);
1939
1940         if (!netif_running(enic->netdev))
1941                 return;
1942
1943         rtnl_lock();
1944
1945         spin_lock(&enic->devcmd_lock);
1946         vnic_dev_hang_notify(enic->vdev);
1947         spin_unlock(&enic->devcmd_lock);
1948
1949         enic_stop(enic->netdev);
1950         enic_dev_soft_reset(enic);
1951         vnic_dev_init(enic->vdev, 0);
1952         enic_reset_mcaddrs(enic);
1953         enic_init_vnic_resources(enic);
1954         enic_set_niccfg(enic);
1955         enic_open(enic->netdev);
1956
1957         rtnl_unlock();
1958 }
1959
1960 static int enic_set_intr_mode(struct enic *enic)
1961 {
1962         unsigned int n = 1;
1963         unsigned int m = 1;
1964         unsigned int i;
1965
1966         /* Set interrupt mode (INTx, MSI, MSI-X) depending
1967          * system capabilities.
1968          *
1969          * Try MSI-X first
1970          *
1971          * We need n RQs, m WQs, n+m CQs, and n+m+2 INTRs
1972          * (the second to last INTR is used for WQ/RQ errors)
1973          * (the last INTR is used for notifications)
1974          */
1975
1976         BUG_ON(ARRAY_SIZE(enic->msix_entry) < n + m + 2);
1977         for (i = 0; i < n + m + 2; i++)
1978                 enic->msix_entry[i].entry = i;
1979
1980         if (enic->config.intr_mode < 1 &&
1981             enic->rq_count >= n &&
1982             enic->wq_count >= m &&
1983             enic->cq_count >= n + m &&
1984             enic->intr_count >= n + m + 2 &&
1985             !pci_enable_msix(enic->pdev, enic->msix_entry, n + m + 2)) {
1986
1987                 enic->rq_count = n;
1988                 enic->wq_count = m;
1989                 enic->cq_count = n + m;
1990                 enic->intr_count = n + m + 2;
1991
1992                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSIX);
1993
1994                 return 0;
1995         }
1996
1997         /* Next try MSI
1998          *
1999          * We need 1 RQ, 1 WQ, 2 CQs, and 1 INTR
2000          */
2001
2002         if (enic->config.intr_mode < 2 &&
2003             enic->rq_count >= 1 &&
2004             enic->wq_count >= 1 &&
2005             enic->cq_count >= 2 &&
2006             enic->intr_count >= 1 &&
2007             !pci_enable_msi(enic->pdev)) {
2008
2009                 enic->rq_count = 1;
2010                 enic->wq_count = 1;
2011                 enic->cq_count = 2;
2012                 enic->intr_count = 1;
2013
2014                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_MSI);
2015
2016                 return 0;
2017         }
2018
2019         /* Next try INTx
2020          *
2021          * We need 1 RQ, 1 WQ, 2 CQs, and 3 INTRs
2022          * (the first INTR is used for WQ/RQ)
2023          * (the second INTR is used for WQ/RQ errors)
2024          * (the last INTR is used for notifications)
2025          */
2026
2027         if (enic->config.intr_mode < 3 &&
2028             enic->rq_count >= 1 &&
2029             enic->wq_count >= 1 &&
2030             enic->cq_count >= 2 &&
2031             enic->intr_count >= 3) {
2032
2033                 enic->rq_count = 1;
2034                 enic->wq_count = 1;
2035                 enic->cq_count = 2;
2036                 enic->intr_count = 3;
2037
2038                 vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_INTX);
2039
2040                 return 0;
2041         }
2042
2043         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2044
2045         return -EINVAL;
2046 }
2047
2048 static void enic_clear_intr_mode(struct enic *enic)
2049 {
2050         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2051         case VNIC_DEV_INTR_MODE_MSIX:
2052                 pci_disable_msix(enic->pdev);
2053                 break;
2054         case VNIC_DEV_INTR_MODE_MSI:
2055                 pci_disable_msi(enic->pdev);
2056                 break;
2057         default:
2058                 break;
2059         }
2060
2061         vnic_dev_set_intr_mode(enic->vdev, VNIC_DEV_INTR_MODE_UNKNOWN);
2062 }
2063
2064 static const struct net_device_ops enic_netdev_dynamic_ops = {
2065         .ndo_open               = enic_open,
2066         .ndo_stop               = enic_stop,
2067         .ndo_start_xmit         = enic_hard_start_xmit,
2068         .ndo_get_stats          = enic_get_stats,
2069         .ndo_validate_addr      = eth_validate_addr,
2070         .ndo_set_multicast_list = enic_set_multicast_list,
2071         .ndo_set_mac_address    = enic_set_mac_address_dynamic,
2072         .ndo_change_mtu         = enic_change_mtu,
2073         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2074         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2075         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2076         .ndo_tx_timeout         = enic_tx_timeout,
2077         .ndo_set_vf_port        = enic_set_vf_port,
2078         .ndo_get_vf_port        = enic_get_vf_port,
2079 #ifdef CONFIG_NET_POLL_CONTROLLER
2080         .ndo_poll_controller    = enic_poll_controller,
2081 #endif
2082 };
2083
2084 static const struct net_device_ops enic_netdev_ops = {
2085         .ndo_open               = enic_open,
2086         .ndo_stop               = enic_stop,
2087         .ndo_start_xmit         = enic_hard_start_xmit,
2088         .ndo_get_stats          = enic_get_stats,
2089         .ndo_validate_addr      = eth_validate_addr,
2090         .ndo_set_multicast_list = enic_set_multicast_list,
2091         .ndo_set_mac_address    = enic_set_mac_address,
2092         .ndo_change_mtu         = enic_change_mtu,
2093         .ndo_vlan_rx_register   = enic_vlan_rx_register,
2094         .ndo_vlan_rx_add_vid    = enic_vlan_rx_add_vid,
2095         .ndo_vlan_rx_kill_vid   = enic_vlan_rx_kill_vid,
2096         .ndo_tx_timeout         = enic_tx_timeout,
2097 #ifdef CONFIG_NET_POLL_CONTROLLER
2098         .ndo_poll_controller    = enic_poll_controller,
2099 #endif
2100 };
2101
2102 void enic_dev_deinit(struct enic *enic)
2103 {
2104         netif_napi_del(&enic->napi);
2105         enic_free_vnic_resources(enic);
2106         enic_clear_intr_mode(enic);
2107 }
2108
2109 int enic_dev_init(struct enic *enic)
2110 {
2111         struct net_device *netdev = enic->netdev;
2112         int err;
2113
2114         /* Get vNIC configuration
2115          */
2116
2117         err = enic_get_vnic_config(enic);
2118         if (err) {
2119                 printk(KERN_ERR PFX
2120                         "Get vNIC configuration failed, aborting.\n");
2121                 return err;
2122         }
2123
2124         /* Get available resource counts
2125          */
2126
2127         enic_get_res_counts(enic);
2128
2129         /* Set interrupt mode based on resource counts and system
2130          * capabilities
2131          */
2132
2133         err = enic_set_intr_mode(enic);
2134         if (err) {
2135                 printk(KERN_ERR PFX
2136                         "Failed to set intr mode based on resource "
2137                         "counts and system capabilities, aborting.\n");
2138                 return err;
2139         }
2140
2141         /* Allocate and configure vNIC resources
2142          */
2143
2144         err = enic_alloc_vnic_resources(enic);
2145         if (err) {
2146                 printk(KERN_ERR PFX
2147                         "Failed to alloc vNIC resources, aborting.\n");
2148                 goto err_out_free_vnic_resources;
2149         }
2150
2151         enic_init_vnic_resources(enic);
2152
2153         err = enic_set_rq_alloc_buf(enic);
2154         if (err) {
2155                 printk(KERN_ERR PFX
2156                         "Failed to set RQ buffer allocator, aborting.\n");
2157                 goto err_out_free_vnic_resources;
2158         }
2159
2160         err = enic_set_niccfg(enic);
2161         if (err) {
2162                 printk(KERN_ERR PFX
2163                         "Failed to config nic, aborting.\n");
2164                 goto err_out_free_vnic_resources;
2165         }
2166
2167         switch (vnic_dev_get_intr_mode(enic->vdev)) {
2168         default:
2169                 netif_napi_add(netdev, &enic->napi, enic_poll, 64);
2170                 break;
2171         case VNIC_DEV_INTR_MODE_MSIX:
2172                 netif_napi_add(netdev, &enic->napi, enic_poll_msix, 64);
2173                 break;
2174         }
2175
2176         return 0;
2177
2178 err_out_free_vnic_resources:
2179         enic_clear_intr_mode(enic);
2180         enic_free_vnic_resources(enic);
2181
2182         return err;
2183 }
2184
2185 static void enic_iounmap(struct enic *enic)
2186 {
2187         unsigned int i;
2188
2189         for (i = 0; i < ARRAY_SIZE(enic->bar); i++)
2190                 if (enic->bar[i].vaddr)
2191                         iounmap(enic->bar[i].vaddr);
2192 }
2193
2194 static int __devinit enic_probe(struct pci_dev *pdev,
2195         const struct pci_device_id *ent)
2196 {
2197         struct net_device *netdev;
2198         struct enic *enic;
2199         int using_dac = 0;
2200         unsigned int i;
2201         int err;
2202
2203         /* Allocate net device structure and initialize.  Private
2204          * instance data is initialized to zero.
2205          */
2206
2207         netdev = alloc_etherdev(sizeof(struct enic));
2208         if (!netdev) {
2209                 printk(KERN_ERR PFX "Etherdev alloc failed, aborting.\n");
2210                 return -ENOMEM;
2211         }
2212
2213         pci_set_drvdata(pdev, netdev);
2214
2215         SET_NETDEV_DEV(netdev, &pdev->dev);
2216
2217         enic = netdev_priv(netdev);
2218         enic->netdev = netdev;
2219         enic->pdev = pdev;
2220
2221         /* Setup PCI resources
2222          */
2223
2224         err = pci_enable_device(pdev);
2225         if (err) {
2226                 printk(KERN_ERR PFX
2227                         "Cannot enable PCI device, aborting.\n");
2228                 goto err_out_free_netdev;
2229         }
2230
2231         err = pci_request_regions(pdev, DRV_NAME);
2232         if (err) {
2233                 printk(KERN_ERR PFX
2234                         "Cannot request PCI regions, aborting.\n");
2235                 goto err_out_disable_device;
2236         }
2237
2238         pci_set_master(pdev);
2239
2240         /* Query PCI controller on system for DMA addressing
2241          * limitation for the device.  Try 40-bit first, and
2242          * fail to 32-bit.
2243          */
2244
2245         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
2246         if (err) {
2247                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
2248                 if (err) {
2249                         printk(KERN_ERR PFX
2250                                 "No usable DMA configuration, aborting.\n");
2251                         goto err_out_release_regions;
2252                 }
2253                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
2254                 if (err) {
2255                         printk(KERN_ERR PFX
2256                                 "Unable to obtain 32-bit DMA "
2257                                 "for consistent allocations, aborting.\n");
2258                         goto err_out_release_regions;
2259                 }
2260         } else {
2261                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
2262                 if (err) {
2263                         printk(KERN_ERR PFX
2264                                 "Unable to obtain 40-bit DMA "
2265                                 "for consistent allocations, aborting.\n");
2266                         goto err_out_release_regions;
2267                 }
2268                 using_dac = 1;
2269         }
2270
2271         /* Map vNIC resources from BAR0-5
2272          */
2273
2274         for (i = 0; i < ARRAY_SIZE(enic->bar); i++) {
2275                 if (!(pci_resource_flags(pdev, i) & IORESOURCE_MEM))
2276                         continue;
2277                 enic->bar[i].len = pci_resource_len(pdev, i);
2278                 enic->bar[i].vaddr = pci_iomap(pdev, i, enic->bar[i].len);
2279                 if (!enic->bar[i].vaddr) {
2280                         printk(KERN_ERR PFX
2281                                 "Cannot memory-map BAR %d, aborting.\n", i);
2282                         err = -ENODEV;
2283                         goto err_out_iounmap;
2284                 }
2285                 enic->bar[i].bus_addr = pci_resource_start(pdev, i);
2286         }
2287
2288         /* Register vNIC device
2289          */
2290
2291         enic->vdev = vnic_dev_register(NULL, enic, pdev, enic->bar,
2292                 ARRAY_SIZE(enic->bar));
2293         if (!enic->vdev) {
2294                 printk(KERN_ERR PFX
2295                         "vNIC registration failed, aborting.\n");
2296                 err = -ENODEV;
2297                 goto err_out_iounmap;
2298         }
2299
2300         /* Issue device open to get device in known state
2301          */
2302
2303         err = enic_dev_open(enic);
2304         if (err) {
2305                 printk(KERN_ERR PFX
2306                         "vNIC dev open failed, aborting.\n");
2307                 goto err_out_vnic_unregister;
2308         }
2309
2310         /* Issue device init to initialize the vnic-to-switch link.
2311          * We'll start with carrier off and wait for link UP
2312          * notification later to turn on carrier.  We don't need
2313          * to wait here for the vnic-to-switch link initialization
2314          * to complete; link UP notification is the indication that
2315          * the process is complete.
2316          */
2317
2318         netif_carrier_off(netdev);
2319
2320         if (!enic_is_dynamic(enic)) {
2321                 err = vnic_dev_init(enic->vdev, 0);
2322                 if (err) {
2323                         printk(KERN_ERR PFX
2324                                 "vNIC dev init failed, aborting.\n");
2325                         goto err_out_dev_close;
2326                 }
2327         }
2328
2329         err = enic_dev_init(enic);
2330         if (err) {
2331                 printk(KERN_ERR PFX
2332                         "Device initialization failed, aborting.\n");
2333                 goto err_out_dev_close;
2334         }
2335
2336         /* Setup notification timer, HW reset task, and locks
2337          */
2338
2339         init_timer(&enic->notify_timer);
2340         enic->notify_timer.function = enic_notify_timer;
2341         enic->notify_timer.data = (unsigned long)enic;
2342
2343         INIT_WORK(&enic->reset, enic_reset);
2344
2345         for (i = 0; i < enic->wq_count; i++)
2346                 spin_lock_init(&enic->wq_lock[i]);
2347
2348         spin_lock_init(&enic->devcmd_lock);
2349
2350         /* Register net device
2351          */
2352
2353         enic->port_mtu = enic->config.mtu;
2354         (void)enic_change_mtu(netdev, enic->port_mtu);
2355
2356         err = enic_set_mac_addr(netdev, enic->mac_addr);
2357         if (err) {
2358                 printk(KERN_ERR PFX
2359                         "Invalid MAC address, aborting.\n");
2360                 goto err_out_dev_deinit;
2361         }
2362
2363         enic->tx_coalesce_usecs = enic->config.intr_timer_usec;
2364         enic->rx_coalesce_usecs = enic->tx_coalesce_usecs;
2365
2366         if (enic_is_dynamic(enic))
2367                 netdev->netdev_ops = &enic_netdev_dynamic_ops;
2368         else
2369                 netdev->netdev_ops = &enic_netdev_ops;
2370
2371         netdev->watchdog_timeo = 2 * HZ;
2372         netdev->ethtool_ops = &enic_ethtool_ops;
2373
2374         netdev->features |= NETIF_F_HW_VLAN_TX | NETIF_F_HW_VLAN_RX;
2375         if (ENIC_SETTING(enic, TXCSUM))
2376                 netdev->features |= NETIF_F_SG | NETIF_F_HW_CSUM;
2377         if (ENIC_SETTING(enic, TSO))
2378                 netdev->features |= NETIF_F_TSO |
2379                         NETIF_F_TSO6 | NETIF_F_TSO_ECN;
2380         if (ENIC_SETTING(enic, LRO))
2381                 netdev->features |= NETIF_F_LRO;
2382         if (using_dac)
2383                 netdev->features |= NETIF_F_HIGHDMA;
2384
2385         enic->csum_rx_enabled = ENIC_SETTING(enic, RXCSUM);
2386
2387         enic->lro_mgr.max_aggr = ENIC_LRO_MAX_AGGR;
2388         enic->lro_mgr.max_desc = ENIC_LRO_MAX_DESC;
2389         enic->lro_mgr.lro_arr = enic->lro_desc;
2390         enic->lro_mgr.get_skb_header = enic_get_skb_header;
2391         enic->lro_mgr.features  = LRO_F_NAPI | LRO_F_EXTRACT_VLAN_ID;
2392         enic->lro_mgr.dev = netdev;
2393         enic->lro_mgr.ip_summed = CHECKSUM_COMPLETE;
2394         enic->lro_mgr.ip_summed_aggr = CHECKSUM_UNNECESSARY;
2395
2396         err = register_netdev(netdev);
2397         if (err) {
2398                 printk(KERN_ERR PFX
2399                         "Cannot register net device, aborting.\n");
2400                 goto err_out_dev_deinit;
2401         }
2402
2403         return 0;
2404
2405 err_out_dev_deinit:
2406         enic_dev_deinit(enic);
2407 err_out_dev_close:
2408         vnic_dev_close(enic->vdev);
2409 err_out_vnic_unregister:
2410         vnic_dev_unregister(enic->vdev);
2411 err_out_iounmap:
2412         enic_iounmap(enic);
2413 err_out_release_regions:
2414         pci_release_regions(pdev);
2415 err_out_disable_device:
2416         pci_disable_device(pdev);
2417 err_out_free_netdev:
2418         pci_set_drvdata(pdev, NULL);
2419         free_netdev(netdev);
2420
2421         return err;
2422 }
2423
2424 static void __devexit enic_remove(struct pci_dev *pdev)
2425 {
2426         struct net_device *netdev = pci_get_drvdata(pdev);
2427
2428         if (netdev) {
2429                 struct enic *enic = netdev_priv(netdev);
2430
2431                 flush_scheduled_work();
2432                 unregister_netdev(netdev);
2433                 enic_dev_deinit(enic);
2434                 vnic_dev_close(enic->vdev);
2435                 vnic_dev_unregister(enic->vdev);
2436                 enic_iounmap(enic);
2437                 pci_release_regions(pdev);
2438                 pci_disable_device(pdev);
2439                 pci_set_drvdata(pdev, NULL);
2440                 free_netdev(netdev);
2441         }
2442 }
2443
2444 static struct pci_driver enic_driver = {
2445         .name = DRV_NAME,
2446         .id_table = enic_id_table,
2447         .probe = enic_probe,
2448         .remove = __devexit_p(enic_remove),
2449 };
2450
2451 static int __init enic_init_module(void)
2452 {
2453         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
2454
2455         return pci_register_driver(&enic_driver);
2456 }
2457
2458 static void __exit enic_cleanup_module(void)
2459 {
2460         pci_unregister_driver(&enic_driver);
2461 }
2462
2463 module_init(enic_init_module);
2464 module_exit(enic_cleanup_module);