drivers/scsi/fnic/fnic

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This source file includes following definitions.
fnic_slave_alloc
fnic_set_rport_dev_loss_tmo
fnic_get_host_speed
fnic_get_stats
fnic_dump_fchost_stats
fnic_reset_host_stats
fnic_log_q_error
fnic_handle_link_event
fnic_notify_set
fnic_notify_timer
fnic_fip_notify_timer
fnic_notify_timer_start
fnic_dev_wait
fnic_cleanup
fnic_iounmap
fnic_get_mac
fnic_set_vlan
fnic_probe
fnic_remove
fnic_init_module
fnic_cleanup_module
   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 #include <linux/module.h>
  19 #include <linux/mempool.h>
  20 #include <linux/string.h>
  21 #include <linux/slab.h>
  22 #include <linux/errno.h>
  23 #include <linux/init.h>
  24 #include <linux/pci.h>
  25 #include <linux/skbuff.h>
  26 #include <linux/interrupt.h>
  27 #include <linux/spinlock.h>
  28 #include <linux/workqueue.h>
  29 #include <linux/if_ether.h>
  30 #include <scsi/fc/fc_fip.h>
  31 #include <scsi/scsi_host.h>
  32 #include <scsi/scsi_transport.h>
  33 #include <scsi/scsi_transport_fc.h>
  34 #include <scsi/scsi_tcq.h>
  35 #include <scsi/libfc.h>
  36 #include <scsi/fc_frame.h>
  37 
  38 #include "vnic_dev.h"
  39 #include "vnic_intr.h"
  40 #include "vnic_stats.h"
  41 #include "fnic_io.h"
  42 #include "fnic_fip.h"
  43 #include "fnic.h"
  44 
  45 #define PCI_DEVICE_ID_CISCO_FNIC        0x0045
  46 
  47 /* Timer to poll notification area for events. Used for MSI interrupts */
  48 #define FNIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  49 
  50 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
  51 static struct kmem_cache *fnic_io_req_cache;
  52 LIST_HEAD(fnic_list);
  53 DEFINE_SPINLOCK(fnic_list_lock);
  54 
  55 /* Supported devices by fnic module */
  56 static struct pci_device_id fnic_id_table[] = {
  57         { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
  58         { 0, }
  59 };
  60 
  61 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  62 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
  63               "Joseph R. Eykholt <jeykholt@cisco.com>");
  64 MODULE_LICENSE("GPL v2");
  65 MODULE_VERSION(DRV_VERSION);
  66 MODULE_DEVICE_TABLE(pci, fnic_id_table);
  67 
  68 unsigned int fnic_log_level;
  69 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
  70 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
  71 
  72 
  73 unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS;
  74 module_param(io_completions, int, S_IRUGO|S_IWUSR);
  75 MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time");
  76 
  77 unsigned int fnic_trace_max_pages = 16;
  78 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
  79 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
  80                                         "for fnic trace buffer");
  81 
  82 unsigned int fnic_fc_trace_max_pages = 64;
  83 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR);
  84 MODULE_PARM_DESC(fnic_fc_trace_max_pages,
  85                  "Total allocated memory pages for fc trace buffer");
  86 
  87 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH;
  88 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR);
  89 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN");
  90 
  91 static struct libfc_function_template fnic_transport_template = {
  92         .frame_send = fnic_send,
  93         .lport_set_port_id = fnic_set_port_id,
  94         .fcp_abort_io = fnic_empty_scsi_cleanup,
  95         .fcp_cleanup = fnic_empty_scsi_cleanup,
  96         .exch_mgr_reset = fnic_exch_mgr_reset
  97 };
  98 
  99 static int fnic_slave_alloc(struct scsi_device *sdev)
 100 {
 101         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
 102 
 103         if (!rport || fc_remote_port_chkready(rport))
 104                 return -ENXIO;
 105 
 106         scsi_change_queue_depth(sdev, fnic_max_qdepth);
 107         return 0;
 108 }
 109 
 110 static struct scsi_host_template fnic_host_template = {
 111         .module = THIS_MODULE,
 112         .name = DRV_NAME,
 113         .queuecommand = fnic_queuecommand,
 114         .eh_timed_out = fc_eh_timed_out,
 115         .eh_abort_handler = fnic_abort_cmd,
 116         .eh_device_reset_handler = fnic_device_reset,
 117         .eh_host_reset_handler = fnic_host_reset,
 118         .slave_alloc = fnic_slave_alloc,
 119         .change_queue_depth = scsi_change_queue_depth,
 120         .this_id = -1,
 121         .cmd_per_lun = 3,
 122         .can_queue = FNIC_DFLT_IO_REQ,
 123         .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
 124         .max_sectors = 0xffff,
 125         .shost_attrs = fnic_attrs,
 126         .track_queue_depth = 1,
 127 };
 128 
 129 static void
 130 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 131 {
 132         if (timeout)
 133                 rport->dev_loss_tmo = timeout;
 134         else
 135                 rport->dev_loss_tmo = 1;
 136 }
 137 
 138 static void fnic_get_host_speed(struct Scsi_Host *shost);
 139 static struct scsi_transport_template *fnic_fc_transport;
 140 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
 141 static void fnic_reset_host_stats(struct Scsi_Host *);
 142 
 143 static struct fc_function_template fnic_fc_functions = {
 144 
 145         .show_host_node_name = 1,
 146         .show_host_port_name = 1,
 147         .show_host_supported_classes = 1,
 148         .show_host_supported_fc4s = 1,
 149         .show_host_active_fc4s = 1,
 150         .show_host_maxframe_size = 1,
 151         .show_host_port_id = 1,
 152         .show_host_supported_speeds = 1,
 153         .get_host_speed = fnic_get_host_speed,
 154         .show_host_speed = 1,
 155         .show_host_port_type = 1,
 156         .get_host_port_state = fc_get_host_port_state,
 157         .show_host_port_state = 1,
 158         .show_host_symbolic_name = 1,
 159         .show_rport_maxframe_size = 1,
 160         .show_rport_supported_classes = 1,
 161         .show_host_fabric_name = 1,
 162         .show_starget_node_name = 1,
 163         .show_starget_port_name = 1,
 164         .show_starget_port_id = 1,
 165         .show_rport_dev_loss_tmo = 1,
 166         .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
 167         .issue_fc_host_lip = fnic_reset,
 168         .get_fc_host_stats = fnic_get_stats,
 169         .reset_fc_host_stats = fnic_reset_host_stats,
 170         .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
 171         .terminate_rport_io = fnic_terminate_rport_io,
 172         .bsg_request = fc_lport_bsg_request,
 173 };
 174 
 175 static void fnic_get_host_speed(struct Scsi_Host *shost)
 176 {
 177         struct fc_lport *lp = shost_priv(shost);
 178         struct fnic *fnic = lport_priv(lp);
 179         u32 port_speed = vnic_dev_port_speed(fnic->vdev);
 180 
 181         /* Add in other values as they get defined in fw */
 182         switch (port_speed) {
 183         case DCEM_PORTSPEED_10G:
 184                 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
 185                 break;
 186         case DCEM_PORTSPEED_20G:
 187                 fc_host_speed(shost) = FC_PORTSPEED_20GBIT;
 188                 break;
 189         case DCEM_PORTSPEED_25G:
 190                 fc_host_speed(shost) = FC_PORTSPEED_25GBIT;
 191                 break;
 192         case DCEM_PORTSPEED_40G:
 193         case DCEM_PORTSPEED_4x10G:
 194                 fc_host_speed(shost) = FC_PORTSPEED_40GBIT;
 195                 break;
 196         case DCEM_PORTSPEED_100G:
 197                 fc_host_speed(shost) = FC_PORTSPEED_100GBIT;
 198                 break;
 199         default:
 200                 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN;
 201                 break;
 202         }
 203 }
 204 
 205 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
 206 {
 207         int ret;
 208         struct fc_lport *lp = shost_priv(host);
 209         struct fnic *fnic = lport_priv(lp);
 210         struct fc_host_statistics *stats = &lp->host_stats;
 211         struct vnic_stats *vs;
 212         unsigned long flags;
 213 
 214         if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
 215                 return stats;
 216         fnic->stats_time = jiffies;
 217 
 218         spin_lock_irqsave(&fnic->fnic_lock, flags);
 219         ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
 220         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 221 
 222         if (ret) {
 223                 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
 224                               "fnic: Get vnic stats failed"
 225                               " 0x%x", ret);
 226                 return stats;
 227         }
 228         vs = fnic->stats;
 229         stats->tx_frames = vs->tx.tx_unicast_frames_ok;
 230         stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
 231         stats->rx_frames = vs->rx.rx_unicast_frames_ok;
 232         stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
 233         stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
 234         stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
 235         stats->invalid_crc_count = vs->rx.rx_crc_errors;
 236         stats->seconds_since_last_reset =
 237                         (jiffies - fnic->stats_reset_time) / HZ;
 238         stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
 239         stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
 240 
 241         return stats;
 242 }
 243 
 244 /*
 245  * fnic_dump_fchost_stats
 246  * note : dumps fc_statistics into system logs
 247  */
 248 void fnic_dump_fchost_stats(struct Scsi_Host *host,
 249                                 struct fc_host_statistics *stats)
 250 {
 251         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 252                         "fnic: seconds since last reset = %llu\n",
 253                         stats->seconds_since_last_reset);
 254         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 255                         "fnic: tx frames                = %llu\n",
 256                         stats->tx_frames);
 257         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 258                         "fnic: tx words         = %llu\n",
 259                         stats->tx_words);
 260         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 261                         "fnic: rx frames                = %llu\n",
 262                         stats->rx_frames);
 263         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 264                         "fnic: rx words         = %llu\n",
 265                         stats->rx_words);
 266         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 267                         "fnic: lip count                = %llu\n",
 268                         stats->lip_count);
 269         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 270                         "fnic: nos count                = %llu\n",
 271                         stats->nos_count);
 272         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 273                         "fnic: error frames             = %llu\n",
 274                         stats->error_frames);
 275         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 276                         "fnic: dumped frames    = %llu\n",
 277                         stats->dumped_frames);
 278         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 279                         "fnic: link failure count       = %llu\n",
 280                         stats->link_failure_count);
 281         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 282                         "fnic: loss of sync count       = %llu\n",
 283                         stats->loss_of_sync_count);
 284         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 285                         "fnic: loss of signal count     = %llu\n",
 286                         stats->loss_of_signal_count);
 287         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 288                         "fnic: prim seq protocol err count = %llu\n",
 289                         stats->prim_seq_protocol_err_count);
 290         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 291                         "fnic: invalid tx word count= %llu\n",
 292                         stats->invalid_tx_word_count);
 293         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 294                         "fnic: invalid crc count        = %llu\n",
 295                         stats->invalid_crc_count);
 296         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 297                         "fnic: fcp input requests       = %llu\n",
 298                         stats->fcp_input_requests);
 299         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 300                         "fnic: fcp output requests      = %llu\n",
 301                         stats->fcp_output_requests);
 302         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 303                         "fnic: fcp control requests     = %llu\n",
 304                         stats->fcp_control_requests);
 305         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 306                         "fnic: fcp input megabytes      = %llu\n",
 307                         stats->fcp_input_megabytes);
 308         FNIC_MAIN_NOTE(KERN_NOTICE, host,
 309                         "fnic: fcp output megabytes     = %llu\n",
 310                         stats->fcp_output_megabytes);
 311         return;
 312 }
 313 
 314 /*
 315  * fnic_reset_host_stats : clears host stats
 316  * note : called when reset_statistics set under sysfs dir
 317  */
 318 static void fnic_reset_host_stats(struct Scsi_Host *host)
 319 {
 320         int ret;
 321         struct fc_lport *lp = shost_priv(host);
 322         struct fnic *fnic = lport_priv(lp);
 323         struct fc_host_statistics *stats;
 324         unsigned long flags;
 325 
 326         /* dump current stats, before clearing them */
 327         stats = fnic_get_stats(host);
 328         fnic_dump_fchost_stats(host, stats);
 329 
 330         spin_lock_irqsave(&fnic->fnic_lock, flags);
 331         ret = vnic_dev_stats_clear(fnic->vdev);
 332         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 333 
 334         if (ret) {
 335                 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
 336                                 "fnic: Reset vnic stats failed"
 337                                 " 0x%x", ret);
 338                 return;
 339         }
 340         fnic->stats_reset_time = jiffies;
 341         memset(stats, 0, sizeof(*stats));
 342 
 343         return;
 344 }
 345 
 346 void fnic_log_q_error(struct fnic *fnic)
 347 {
 348         unsigned int i;
 349         u32 error_status;
 350 
 351         for (i = 0; i < fnic->raw_wq_count; i++) {
 352                 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
 353                 if (error_status)
 354                         shost_printk(KERN_ERR, fnic->lport->host,
 355                                      "WQ[%d] error_status"
 356                                      " %d\n", i, error_status);
 357         }
 358 
 359         for (i = 0; i < fnic->rq_count; i++) {
 360                 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
 361                 if (error_status)
 362                         shost_printk(KERN_ERR, fnic->lport->host,
 363                                      "RQ[%d] error_status"
 364                                      " %d\n", i, error_status);
 365         }
 366 
 367         for (i = 0; i < fnic->wq_copy_count; i++) {
 368                 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
 369                 if (error_status)
 370                         shost_printk(KERN_ERR, fnic->lport->host,
 371                                      "CWQ[%d] error_status"
 372                                      " %d\n", i, error_status);
 373         }
 374 }
 375 
 376 void fnic_handle_link_event(struct fnic *fnic)
 377 {
 378         unsigned long flags;
 379 
 380         spin_lock_irqsave(&fnic->fnic_lock, flags);
 381         if (fnic->stop_rx_link_events) {
 382                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 383                 return;
 384         }
 385         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 386 
 387         queue_work(fnic_event_queue, &fnic->link_work);
 388 
 389 }
 390 
 391 static int fnic_notify_set(struct fnic *fnic)
 392 {
 393         int err;
 394 
 395         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 396         case VNIC_DEV_INTR_MODE_INTX:
 397                 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
 398                 break;
 399         case VNIC_DEV_INTR_MODE_MSI:
 400                 err = vnic_dev_notify_set(fnic->vdev, -1);
 401                 break;
 402         case VNIC_DEV_INTR_MODE_MSIX:
 403                 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
 404                 break;
 405         default:
 406                 shost_printk(KERN_ERR, fnic->lport->host,
 407                              "Interrupt mode should be set up"
 408                              " before devcmd notify set %d\n",
 409                              vnic_dev_get_intr_mode(fnic->vdev));
 410                 err = -1;
 411                 break;
 412         }
 413 
 414         return err;
 415 }
 416 
 417 static void fnic_notify_timer(struct timer_list *t)
 418 {
 419         struct fnic *fnic = from_timer(fnic, t, notify_timer);
 420 
 421         fnic_handle_link_event(fnic);
 422         mod_timer(&fnic->notify_timer,
 423                   round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
 424 }
 425 
 426 static void fnic_fip_notify_timer(struct timer_list *t)
 427 {
 428         struct fnic *fnic = from_timer(fnic, t, fip_timer);
 429 
 430         fnic_handle_fip_timer(fnic);
 431 }
 432 
 433 static void fnic_notify_timer_start(struct fnic *fnic)
 434 {
 435         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 436         case VNIC_DEV_INTR_MODE_MSI:
 437                 /*
 438                  * Schedule first timeout immediately. The driver is
 439                  * initiatialized and ready to look for link up notification
 440                  */
 441                 mod_timer(&fnic->notify_timer, jiffies);
 442                 break;
 443         default:
 444                 /* Using intr for notification for INTx/MSI-X */
 445                 break;
 446         };
 447 }
 448 
 449 static int fnic_dev_wait(struct vnic_dev *vdev,
 450                          int (*start)(struct vnic_dev *, int),
 451                          int (*finished)(struct vnic_dev *, int *),
 452                          int arg)
 453 {
 454         unsigned long time;
 455         int done;
 456         int err;
 457         int count;
 458 
 459         count = 0;
 460 
 461         err = start(vdev, arg);
 462         if (err)
 463                 return err;
 464 
 465         /* Wait for func to complete.
 466         * Sometime schedule_timeout_uninterruptible take long time
 467         * to wake up so we do not retry as we are only waiting for
 468         * 2 seconds in while loop. By adding count, we make sure
 469         * we try atleast three times before returning -ETIMEDOUT
 470         */
 471         time = jiffies + (HZ * 2);
 472         do {
 473                 err = finished(vdev, &done);
 474                 count++;
 475                 if (err)
 476                         return err;
 477                 if (done)
 478                         return 0;
 479                 schedule_timeout_uninterruptible(HZ / 10);
 480         } while (time_after(time, jiffies) || (count < 3));
 481 
 482         return -ETIMEDOUT;
 483 }
 484 
 485 static int fnic_cleanup(struct fnic *fnic)
 486 {
 487         unsigned int i;
 488         int err;
 489 
 490         vnic_dev_disable(fnic->vdev);
 491         for (i = 0; i < fnic->intr_count; i++)
 492                 vnic_intr_mask(&fnic->intr[i]);
 493 
 494         for (i = 0; i < fnic->rq_count; i++) {
 495                 err = vnic_rq_disable(&fnic->rq[i]);
 496                 if (err)
 497                         return err;
 498         }
 499         for (i = 0; i < fnic->raw_wq_count; i++) {
 500                 err = vnic_wq_disable(&fnic->wq[i]);
 501                 if (err)
 502                         return err;
 503         }
 504         for (i = 0; i < fnic->wq_copy_count; i++) {
 505                 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
 506                 if (err)
 507                         return err;
 508         }
 509 
 510         /* Clean up completed IOs and FCS frames */
 511         fnic_wq_copy_cmpl_handler(fnic, io_completions);
 512         fnic_wq_cmpl_handler(fnic, -1);
 513         fnic_rq_cmpl_handler(fnic, -1);
 514 
 515         /* Clean up the IOs and FCS frames that have not completed */
 516         for (i = 0; i < fnic->raw_wq_count; i++)
 517                 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
 518         for (i = 0; i < fnic->rq_count; i++)
 519                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 520         for (i = 0; i < fnic->wq_copy_count; i++)
 521                 vnic_wq_copy_clean(&fnic->wq_copy[i],
 522                                    fnic_wq_copy_cleanup_handler);
 523 
 524         for (i = 0; i < fnic->cq_count; i++)
 525                 vnic_cq_clean(&fnic->cq[i]);
 526         for (i = 0; i < fnic->intr_count; i++)
 527                 vnic_intr_clean(&fnic->intr[i]);
 528 
 529         mempool_destroy(fnic->io_req_pool);
 530         for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
 531                 mempool_destroy(fnic->io_sgl_pool[i]);
 532 
 533         return 0;
 534 }
 535 
 536 static void fnic_iounmap(struct fnic *fnic)
 537 {
 538         if (fnic->bar0.vaddr)
 539                 iounmap(fnic->bar0.vaddr);
 540 }
 541 
 542 /**
 543  * fnic_get_mac() - get assigned data MAC address for FIP code.
 544  * @lport:      local port.
 545  */
 546 static u8 *fnic_get_mac(struct fc_lport *lport)
 547 {
 548         struct fnic *fnic = lport_priv(lport);
 549 
 550         return fnic->data_src_addr;
 551 }
 552 
 553 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id)
 554 {
 555         u16 old_vlan;
 556         old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id);
 557 }
 558 
 559 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 560 {
 561         struct Scsi_Host *host;
 562         struct fc_lport *lp;
 563         struct fnic *fnic;
 564         mempool_t *pool;
 565         int err;
 566         int i;
 567         unsigned long flags;
 568 
 569         /*
 570          * Allocate SCSI Host and set up association between host,
 571          * local port, and fnic
 572          */
 573         lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
 574         if (!lp) {
 575                 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
 576                 err = -ENOMEM;
 577                 goto err_out;
 578         }
 579         host = lp->host;
 580         fnic = lport_priv(lp);
 581         fnic->lport = lp;
 582         fnic->ctlr.lp = lp;
 583 
 584         snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
 585                  host->host_no);
 586 
 587         host->transportt = fnic_fc_transport;
 588 
 589         fnic_stats_debugfs_init(fnic);
 590 
 591         /* Setup PCI resources */
 592         pci_set_drvdata(pdev, fnic);
 593 
 594         fnic->pdev = pdev;
 595 
 596         err = pci_enable_device(pdev);
 597         if (err) {
 598                 shost_printk(KERN_ERR, fnic->lport->host,
 599                              "Cannot enable PCI device, aborting.\n");
 600                 goto err_out_free_hba;
 601         }
 602 
 603         err = pci_request_regions(pdev, DRV_NAME);
 604         if (err) {
 605                 shost_printk(KERN_ERR, fnic->lport->host,
 606                              "Cannot enable PCI resources, aborting\n");
 607                 goto err_out_disable_device;
 608         }
 609 
 610         pci_set_master(pdev);
 611 
 612         /* Query PCI controller on system for DMA addressing
 613          * limitation for the device.  Try 64-bit first, and
 614          * fail to 32-bit.
 615          */
 616         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
 617         if (err) {
 618                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
 619                 if (err) {
 620                         shost_printk(KERN_ERR, fnic->lport->host,
 621                                      "No usable DMA configuration "
 622                                      "aborting\n");
 623                         goto err_out_release_regions;
 624                 }
 625         }
 626 
 627         /* Map vNIC resources from BAR0 */
 628         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
 629                 shost_printk(KERN_ERR, fnic->lport->host,
 630                              "BAR0 not memory-map'able, aborting.\n");
 631                 err = -ENODEV;
 632                 goto err_out_release_regions;
 633         }
 634 
 635         fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
 636         fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
 637         fnic->bar0.len = pci_resource_len(pdev, 0);
 638 
 639         if (!fnic->bar0.vaddr) {
 640                 shost_printk(KERN_ERR, fnic->lport->host,
 641                              "Cannot memory-map BAR0 res hdr, "
 642                              "aborting.\n");
 643                 err = -ENODEV;
 644                 goto err_out_release_regions;
 645         }
 646 
 647         fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
 648         if (!fnic->vdev) {
 649                 shost_printk(KERN_ERR, fnic->lport->host,
 650                              "vNIC registration failed, "
 651                              "aborting.\n");
 652                 err = -ENODEV;
 653                 goto err_out_iounmap;
 654         }
 655 
 656         err = vnic_dev_cmd_init(fnic->vdev);
 657         if (err) {
 658                 shost_printk(KERN_ERR, fnic->lport->host,
 659                                 "vnic_dev_cmd_init() returns %d, aborting\n",
 660                                 err);
 661                 goto err_out_vnic_unregister;
 662         }
 663 
 664         err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
 665                             vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST);
 666         if (err) {
 667                 shost_printk(KERN_ERR, fnic->lport->host,
 668                              "vNIC dev open failed, aborting.\n");
 669                 goto err_out_dev_cmd_deinit;
 670         }
 671 
 672         err = vnic_dev_init(fnic->vdev, 0);
 673         if (err) {
 674                 shost_printk(KERN_ERR, fnic->lport->host,
 675                              "vNIC dev init failed, aborting.\n");
 676                 goto err_out_dev_close;
 677         }
 678 
 679         err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
 680         if (err) {
 681                 shost_printk(KERN_ERR, fnic->lport->host,
 682                              "vNIC get MAC addr failed \n");
 683                 goto err_out_dev_close;
 684         }
 685         /* set data_src for point-to-point mode and to keep it non-zero */
 686         memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
 687 
 688         /* Get vNIC configuration */
 689         err = fnic_get_vnic_config(fnic);
 690         if (err) {
 691                 shost_printk(KERN_ERR, fnic->lport->host,
 692                              "Get vNIC configuration failed, "
 693                              "aborting.\n");
 694                 goto err_out_dev_close;
 695         }
 696 
 697         /* Configure Maximum Outstanding IO reqs*/
 698         if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) {
 699                 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ,
 700                                         max_t(u32, FNIC_MIN_IO_REQ,
 701                                         fnic->config.io_throttle_count));
 702         }
 703         fnic->fnic_max_tag_id = host->can_queue;
 704 
 705         host->max_lun = fnic->config.luns_per_tgt;
 706         host->max_id = FNIC_MAX_FCP_TARGET;
 707         host->max_cmd_len = FCOE_MAX_CMD_LEN;
 708 
 709         fnic_get_res_counts(fnic);
 710 
 711         err = fnic_set_intr_mode(fnic);
 712         if (err) {
 713                 shost_printk(KERN_ERR, fnic->lport->host,
 714                              "Failed to set intr mode, "
 715                              "aborting.\n");
 716                 goto err_out_dev_close;
 717         }
 718 
 719         err = fnic_alloc_vnic_resources(fnic);
 720         if (err) {
 721                 shost_printk(KERN_ERR, fnic->lport->host,
 722                              "Failed to alloc vNIC resources, "
 723                              "aborting.\n");
 724                 goto err_out_clear_intr;
 725         }
 726 
 727 
 728         /* initialize all fnic locks */
 729         spin_lock_init(&fnic->fnic_lock);
 730 
 731         for (i = 0; i < FNIC_WQ_MAX; i++)
 732                 spin_lock_init(&fnic->wq_lock[i]);
 733 
 734         for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
 735                 spin_lock_init(&fnic->wq_copy_lock[i]);
 736                 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
 737                 fnic->fw_ack_recd[i] = 0;
 738                 fnic->fw_ack_index[i] = -1;
 739         }
 740 
 741         for (i = 0; i < FNIC_IO_LOCKS; i++)
 742                 spin_lock_init(&fnic->io_req_lock[i]);
 743 
 744         fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
 745         if (!fnic->io_req_pool)
 746                 goto err_out_free_resources;
 747 
 748         pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 749         if (!pool)
 750                 goto err_out_free_ioreq_pool;
 751         fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
 752 
 753         pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 754         if (!pool)
 755                 goto err_out_free_dflt_pool;
 756         fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
 757 
 758         /* setup vlan config, hw inserts vlan header */
 759         fnic->vlan_hw_insert = 1;
 760         fnic->vlan_id = 0;
 761 
 762         /* Initialize the FIP fcoe_ctrl struct */
 763         fnic->ctlr.send = fnic_eth_send;
 764         fnic->ctlr.update_mac = fnic_update_mac;
 765         fnic->ctlr.get_src_addr = fnic_get_mac;
 766         if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 767                 shost_printk(KERN_INFO, fnic->lport->host,
 768                              "firmware supports FIP\n");
 769                 /* enable directed and multicast */
 770                 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
 771                 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
 772                 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
 773                 fnic->set_vlan = fnic_set_vlan;
 774                 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
 775                 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0);
 776                 spin_lock_init(&fnic->vlans_lock);
 777                 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame);
 778                 INIT_WORK(&fnic->event_work, fnic_handle_event);
 779                 skb_queue_head_init(&fnic->fip_frame_queue);
 780                 INIT_LIST_HEAD(&fnic->evlist);
 781                 INIT_LIST_HEAD(&fnic->vlans);
 782         } else {
 783                 shost_printk(KERN_INFO, fnic->lport->host,
 784                              "firmware uses non-FIP mode\n");
 785                 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
 786                 fnic->ctlr.state = FIP_ST_NON_FIP;
 787         }
 788         fnic->state = FNIC_IN_FC_MODE;
 789 
 790         atomic_set(&fnic->in_flight, 0);
 791         fnic->state_flags = FNIC_FLAGS_NONE;
 792 
 793         /* Enable hardware stripping of vlan header on ingress */
 794         fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
 795 
 796         /* Setup notification buffer area */
 797         err = fnic_notify_set(fnic);
 798         if (err) {
 799                 shost_printk(KERN_ERR, fnic->lport->host,
 800                              "Failed to alloc notify buffer, aborting.\n");
 801                 goto err_out_free_max_pool;
 802         }
 803 
 804         /* Setup notify timer when using MSI interrupts */
 805         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 806                 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0);
 807 
 808         /* allocate RQ buffers and post them to RQ*/
 809         for (i = 0; i < fnic->rq_count; i++) {
 810                 vnic_rq_enable(&fnic->rq[i]);
 811                 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 812                 if (err) {
 813                         shost_printk(KERN_ERR, fnic->lport->host,
 814                                      "fnic_alloc_rq_frame can't alloc "
 815                                      "frame\n");
 816                         goto err_out_free_rq_buf;
 817                 }
 818         }
 819 
 820         /*
 821          * Initialization done with PCI system, hardware, firmware.
 822          * Add host to SCSI
 823          */
 824         err = scsi_add_host(lp->host, &pdev->dev);
 825         if (err) {
 826                 shost_printk(KERN_ERR, fnic->lport->host,
 827                              "fnic: scsi_add_host failed...exiting\n");
 828                 goto err_out_free_rq_buf;
 829         }
 830 
 831         /* Start local port initiatialization */
 832 
 833         lp->link_up = 0;
 834 
 835         lp->max_retry_count = fnic->config.flogi_retries;
 836         lp->max_rport_retry_count = fnic->config.plogi_retries;
 837         lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
 838                               FCP_SPPF_CONF_COMPL);
 839         if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
 840                 lp->service_params |= FCP_SPPF_RETRY;
 841 
 842         lp->boot_time = jiffies;
 843         lp->e_d_tov = fnic->config.ed_tov;
 844         lp->r_a_tov = fnic->config.ra_tov;
 845         lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
 846         fc_set_wwnn(lp, fnic->config.node_wwn);
 847         fc_set_wwpn(lp, fnic->config.port_wwn);
 848 
 849         fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
 850 
 851         if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
 852                                FCPIO_HOST_EXCH_RANGE_END, NULL)) {
 853                 err = -ENOMEM;
 854                 goto err_out_remove_scsi_host;
 855         }
 856 
 857         fc_lport_init_stats(lp);
 858         fnic->stats_reset_time = jiffies;
 859 
 860         fc_lport_config(lp);
 861 
 862         if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
 863                        sizeof(struct fc_frame_header))) {
 864                 err = -EINVAL;
 865                 goto err_out_free_exch_mgr;
 866         }
 867         fc_host_maxframe_size(lp->host) = lp->mfs;
 868         fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
 869 
 870         sprintf(fc_host_symbolic_name(lp->host),
 871                 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
 872 
 873         spin_lock_irqsave(&fnic_list_lock, flags);
 874         list_add_tail(&fnic->list, &fnic_list);
 875         spin_unlock_irqrestore(&fnic_list_lock, flags);
 876 
 877         INIT_WORK(&fnic->link_work, fnic_handle_link);
 878         INIT_WORK(&fnic->frame_work, fnic_handle_frame);
 879         skb_queue_head_init(&fnic->frame_queue);
 880         skb_queue_head_init(&fnic->tx_queue);
 881 
 882         /* Enable all queues */
 883         for (i = 0; i < fnic->raw_wq_count; i++)
 884                 vnic_wq_enable(&fnic->wq[i]);
 885         for (i = 0; i < fnic->wq_copy_count; i++)
 886                 vnic_wq_copy_enable(&fnic->wq_copy[i]);
 887 
 888         fc_fabric_login(lp);
 889 
 890         err = fnic_request_intr(fnic);
 891         if (err) {
 892                 shost_printk(KERN_ERR, fnic->lport->host,
 893                              "Unable to request irq.\n");
 894                 goto err_out_free_exch_mgr;
 895         }
 896 
 897         vnic_dev_enable(fnic->vdev);
 898 
 899         for (i = 0; i < fnic->intr_count; i++)
 900                 vnic_intr_unmask(&fnic->intr[i]);
 901 
 902         fnic_notify_timer_start(fnic);
 903 
 904         return 0;
 905 
 906 err_out_free_exch_mgr:
 907         fc_exch_mgr_free(lp);
 908 err_out_remove_scsi_host:
 909         fc_remove_host(lp->host);
 910         scsi_remove_host(lp->host);
 911 err_out_free_rq_buf:
 912         for (i = 0; i < fnic->rq_count; i++)
 913                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 914         vnic_dev_notify_unset(fnic->vdev);
 915 err_out_free_max_pool:
 916         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
 917 err_out_free_dflt_pool:
 918         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
 919 err_out_free_ioreq_pool:
 920         mempool_destroy(fnic->io_req_pool);
 921 err_out_free_resources:
 922         fnic_free_vnic_resources(fnic);
 923 err_out_clear_intr:
 924         fnic_clear_intr_mode(fnic);
 925 err_out_dev_close:
 926         vnic_dev_close(fnic->vdev);
 927 err_out_dev_cmd_deinit:
 928 err_out_vnic_unregister:
 929         vnic_dev_unregister(fnic->vdev);
 930 err_out_iounmap:
 931         fnic_iounmap(fnic);
 932 err_out_release_regions:
 933         pci_release_regions(pdev);
 934 err_out_disable_device:
 935         pci_disable_device(pdev);
 936 err_out_free_hba:
 937         fnic_stats_debugfs_remove(fnic);
 938         scsi_host_put(lp->host);
 939 err_out:
 940         return err;
 941 }
 942 
 943 static void fnic_remove(struct pci_dev *pdev)
 944 {
 945         struct fnic *fnic = pci_get_drvdata(pdev);
 946         struct fc_lport *lp = fnic->lport;
 947         unsigned long flags;
 948 
 949         /*
 950          * Mark state so that the workqueue thread stops forwarding
 951          * received frames and link events to the local port. ISR and
 952          * other threads that can queue work items will also stop
 953          * creating work items on the fnic workqueue
 954          */
 955         spin_lock_irqsave(&fnic->fnic_lock, flags);
 956         fnic->stop_rx_link_events = 1;
 957         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 958 
 959         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 960                 del_timer_sync(&fnic->notify_timer);
 961 
 962         /*
 963          * Flush the fnic event queue. After this call, there should
 964          * be no event queued for this fnic device in the workqueue
 965          */
 966         flush_workqueue(fnic_event_queue);
 967         skb_queue_purge(&fnic->frame_queue);
 968         skb_queue_purge(&fnic->tx_queue);
 969 
 970         if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 971                 del_timer_sync(&fnic->fip_timer);
 972                 skb_queue_purge(&fnic->fip_frame_queue);
 973                 fnic_fcoe_reset_vlans(fnic);
 974                 fnic_fcoe_evlist_free(fnic);
 975         }
 976 
 977         /*
 978          * Log off the fabric. This stops all remote ports, dns port,
 979          * logs off the fabric. This flushes all rport, disc, lport work
 980          * before returning
 981          */
 982         fc_fabric_logoff(fnic->lport);
 983 
 984         spin_lock_irqsave(&fnic->fnic_lock, flags);
 985         fnic->in_remove = 1;
 986         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 987 
 988         fcoe_ctlr_destroy(&fnic->ctlr);
 989         fc_lport_destroy(lp);
 990         fnic_stats_debugfs_remove(fnic);
 991 
 992         /*
 993          * This stops the fnic device, masks all interrupts. Completed
 994          * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
 995          * cleaned up
 996          */
 997         fnic_cleanup(fnic);
 998 
 999         BUG_ON(!skb_queue_empty(&fnic->frame_queue));
1000         BUG_ON(!skb_queue_empty(&fnic->tx_queue));
1001 
1002         spin_lock_irqsave(&fnic_list_lock, flags);
1003         list_del(&fnic->list);
1004         spin_unlock_irqrestore(&fnic_list_lock, flags);
1005 
1006         fc_remove_host(fnic->lport->host);
1007         scsi_remove_host(fnic->lport->host);
1008         fc_exch_mgr_free(fnic->lport);
1009         vnic_dev_notify_unset(fnic->vdev);
1010         fnic_free_intr(fnic);
1011         fnic_free_vnic_resources(fnic);
1012         fnic_clear_intr_mode(fnic);
1013         vnic_dev_close(fnic->vdev);
1014         vnic_dev_unregister(fnic->vdev);
1015         fnic_iounmap(fnic);
1016         pci_release_regions(pdev);
1017         pci_disable_device(pdev);
1018         scsi_host_put(lp->host);
1019 }
1020 
1021 static struct pci_driver fnic_driver = {
1022         .name = DRV_NAME,
1023         .id_table = fnic_id_table,
1024         .probe = fnic_probe,
1025         .remove = fnic_remove,
1026 };
1027 
1028 static int __init fnic_init_module(void)
1029 {
1030         size_t len;
1031         int err = 0;
1032 
1033         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
1034 
1035         /* Create debugfs entries for fnic */
1036         err = fnic_debugfs_init();
1037         if (err < 0) {
1038                 printk(KERN_ERR PFX "Failed to create fnic directory "
1039                                 "for tracing and stats logging\n");
1040                 fnic_debugfs_terminate();
1041         }
1042 
1043         /* Allocate memory for trace buffer */
1044         err = fnic_trace_buf_init();
1045         if (err < 0) {
1046                 printk(KERN_ERR PFX
1047                        "Trace buffer initialization Failed. "
1048                        "Fnic Tracing utility is disabled\n");
1049                 fnic_trace_free();
1050         }
1051 
1052     /* Allocate memory for fc trace buffer */
1053         err = fnic_fc_trace_init();
1054         if (err < 0) {
1055                 printk(KERN_ERR PFX "FC trace buffer initialization Failed "
1056                        "FC frame tracing utility is disabled\n");
1057                 fnic_fc_trace_free();
1058         }
1059 
1060         /* Create a cache for allocation of default size sgls */
1061         len = sizeof(struct fnic_dflt_sgl_list);
1062         fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
1063                 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1064                  SLAB_HWCACHE_ALIGN,
1065                  NULL);
1066         if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
1067                 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
1068                 err = -ENOMEM;
1069                 goto err_create_fnic_sgl_slab_dflt;
1070         }
1071 
1072         /* Create a cache for allocation of max size sgls*/
1073         len = sizeof(struct fnic_sgl_list);
1074         fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
1075                 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
1076                   SLAB_HWCACHE_ALIGN,
1077                   NULL);
1078         if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
1079                 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
1080                 err = -ENOMEM;
1081                 goto err_create_fnic_sgl_slab_max;
1082         }
1083 
1084         /* Create a cache of io_req structs for use via mempool */
1085         fnic_io_req_cache = kmem_cache_create("fnic_io_req",
1086                                               sizeof(struct fnic_io_req),
1087                                               0, SLAB_HWCACHE_ALIGN, NULL);
1088         if (!fnic_io_req_cache) {
1089                 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
1090                 err = -ENOMEM;
1091                 goto err_create_fnic_ioreq_slab;
1092         }
1093 
1094         fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
1095         if (!fnic_event_queue) {
1096                 printk(KERN_ERR PFX "fnic work queue create failed\n");
1097                 err = -ENOMEM;
1098                 goto err_create_fnic_workq;
1099         }
1100 
1101         spin_lock_init(&fnic_list_lock);
1102         INIT_LIST_HEAD(&fnic_list);
1103 
1104         fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q");
1105         if (!fnic_fip_queue) {
1106                 printk(KERN_ERR PFX "fnic FIP work queue create failed\n");
1107                 err = -ENOMEM;
1108                 goto err_create_fip_workq;
1109         }
1110 
1111         fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
1112         if (!fnic_fc_transport) {
1113                 printk(KERN_ERR PFX "fc_attach_transport error\n");
1114                 err = -ENOMEM;
1115                 goto err_fc_transport;
1116         }
1117 
1118         /* register the driver with PCI system */
1119         err = pci_register_driver(&fnic_driver);
1120         if (err < 0) {
1121                 printk(KERN_ERR PFX "pci register error\n");
1122                 goto err_pci_register;
1123         }
1124         return err;
1125 
1126 err_pci_register:
1127         fc_release_transport(fnic_fc_transport);
1128 err_fc_transport:
1129         destroy_workqueue(fnic_fip_queue);
1130 err_create_fip_workq:
1131         destroy_workqueue(fnic_event_queue);
1132 err_create_fnic_workq:
1133         kmem_cache_destroy(fnic_io_req_cache);
1134 err_create_fnic_ioreq_slab:
1135         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1136 err_create_fnic_sgl_slab_max:
1137         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1138 err_create_fnic_sgl_slab_dflt:
1139         fnic_trace_free();
1140         fnic_fc_trace_free();
1141         fnic_debugfs_terminate();
1142         return err;
1143 }
1144 
1145 static void __exit fnic_cleanup_module(void)
1146 {
1147         pci_unregister_driver(&fnic_driver);
1148         destroy_workqueue(fnic_event_queue);
1149         if (fnic_fip_queue) {
1150                 flush_workqueue(fnic_fip_queue);
1151                 destroy_workqueue(fnic_fip_queue);
1152         }
1153         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
1154         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
1155         kmem_cache_destroy(fnic_io_req_cache);
1156         fc_release_transport(fnic_fc_transport);
1157         fnic_trace_free();
1158         fnic_fc_trace_free();
1159         fnic_debugfs_terminate();
1160 }
1161 
1162 module_init(fnic_init_module);
1163 module_exit(fnic_cleanup_module);
1164
/* [<][>][^][v][top][bottom][index][help] */
root/drivers/scsi/fnic/fnic_main.c

DEFINITIONS
