drivers/scsi/fnic/fnic_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 #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.h"
  43
  44 #define PCI_DEVICE_ID_CISCO_FNIC        0x0045
  45
  46 /* Timer to poll notification area for events. Used for MSI interrupts */
  47 #define FNIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  48
  49 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
  50 static struct kmem_cache *fnic_io_req_cache;
  51 LIST_HEAD(fnic_list);
  52 DEFINE_SPINLOCK(fnic_list_lock);
  53
  54 /* Supported devices by fnic module */
  55 static struct pci_device_id fnic_id_table[] = {
  56         { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
  57         { 0, }
  58 };
  59
  60 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  61 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
  62               "Joseph R. Eykholt <jeykholt@cisco.com>");
  63 MODULE_LICENSE("GPL v2");
  64 MODULE_VERSION(DRV_VERSION);
  65 MODULE_DEVICE_TABLE(pci, fnic_id_table);
  66
  67 unsigned int fnic_log_level;
  68 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
  69 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
  70
  71 unsigned int fnic_trace_max_pages = 16;
  72 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR);
  73 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages "
  74                                         "for fnic trace buffer");
  75
  76 static struct libfc_function_template fnic_transport_template = {
  77         .frame_send = fnic_send,
  78         .lport_set_port_id = fnic_set_port_id,
  79         .fcp_abort_io = fnic_empty_scsi_cleanup,
  80         .fcp_cleanup = fnic_empty_scsi_cleanup,
  81         .exch_mgr_reset = fnic_exch_mgr_reset
  82 };
  83
  84 static int fnic_slave_alloc(struct scsi_device *sdev)
  85 {
  86         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
  87
  88         sdev->tagged_supported = 1;
  89
  90         if (!rport || fc_remote_port_chkready(rport))
  91                 return -ENXIO;
  92
  93         scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
  94         return 0;
  95 }
  96
  97 static struct scsi_host_template fnic_host_template = {
  98         .module = THIS_MODULE,
  99         .name = DRV_NAME,
 100         .queuecommand = fnic_queuecommand,
 101         .eh_abort_handler = fnic_abort_cmd,
 102         .eh_device_reset_handler = fnic_device_reset,
 103         .eh_host_reset_handler = fnic_host_reset,
 104         .slave_alloc = fnic_slave_alloc,
 105         .change_queue_depth = fc_change_queue_depth,
 106         .change_queue_type = fc_change_queue_type,
 107         .this_id = -1,
 108         .cmd_per_lun = 3,
 109         .can_queue = FNIC_MAX_IO_REQ,
 110         .use_clustering = ENABLE_CLUSTERING,
 111         .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
 112         .max_sectors = 0xffff,
 113         .shost_attrs = fnic_attrs,
 114 };
 115
 116 static void
 117 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout)
 118 {
 119         if (timeout)
 120                 rport->dev_loss_tmo = timeout;
 121         else
 122                 rport->dev_loss_tmo = 1;
 123 }
 124
 125 static void fnic_get_host_speed(struct Scsi_Host *shost);
 126 static struct scsi_transport_template *fnic_fc_transport;
 127 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
 128
 129 static struct fc_function_template fnic_fc_functions = {
 130
 131         .show_host_node_name = 1,
 132         .show_host_port_name = 1,
 133         .show_host_supported_classes = 1,
 134         .show_host_supported_fc4s = 1,
 135         .show_host_active_fc4s = 1,
 136         .show_host_maxframe_size = 1,
 137         .show_host_port_id = 1,
 138         .show_host_supported_speeds = 1,
 139         .get_host_speed = fnic_get_host_speed,
 140         .show_host_speed = 1,
 141         .show_host_port_type = 1,
 142         .get_host_port_state = fc_get_host_port_state,
 143         .show_host_port_state = 1,
 144         .show_host_symbolic_name = 1,
 145         .show_rport_maxframe_size = 1,
 146         .show_rport_supported_classes = 1,
 147         .show_host_fabric_name = 1,
 148         .show_starget_node_name = 1,
 149         .show_starget_port_name = 1,
 150         .show_starget_port_id = 1,
 151         .show_rport_dev_loss_tmo = 1,
 152         .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo,
 153         .issue_fc_host_lip = fnic_reset,
 154         .get_fc_host_stats = fnic_get_stats,
 155         .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
 156         .terminate_rport_io = fnic_terminate_rport_io,
 157         .bsg_request = fc_lport_bsg_request,
 158 };
 159
 160 static void fnic_get_host_speed(struct Scsi_Host *shost)
 161 {
 162         struct fc_lport *lp = shost_priv(shost);
 163         struct fnic *fnic = lport_priv(lp);
 164         u32 port_speed = vnic_dev_port_speed(fnic->vdev);
 165
 166         /* Add in other values as they get defined in fw */
 167         switch (port_speed) {
 168         case 10000:
 169                 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
 170                 break;
 171         default:
 172                 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
 173                 break;
 174         }
 175 }
 176
 177 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
 178 {
 179         int ret;
 180         struct fc_lport *lp = shost_priv(host);
 181         struct fnic *fnic = lport_priv(lp);
 182         struct fc_host_statistics *stats = &lp->host_stats;
 183         struct vnic_stats *vs;
 184         unsigned long flags;
 185
 186         if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
 187                 return stats;
 188         fnic->stats_time = jiffies;
 189
 190         spin_lock_irqsave(&fnic->fnic_lock, flags);
 191         ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
 192         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 193
 194         if (ret) {
 195                 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
 196                               "fnic: Get vnic stats failed"
 197                               " 0x%x", ret);
 198                 return stats;
 199         }
 200         vs = fnic->stats;
 201         stats->tx_frames = vs->tx.tx_unicast_frames_ok;
 202         stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
 203         stats->rx_frames = vs->rx.rx_unicast_frames_ok;
 204         stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
 205         stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
 206         stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
 207         stats->invalid_crc_count = vs->rx.rx_crc_errors;
 208         stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
 209         stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
 210         stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
 211
 212         return stats;
 213 }
 214
 215 void fnic_log_q_error(struct fnic *fnic)
 216 {
 217         unsigned int i;
 218         u32 error_status;
 219
 220         for (i = 0; i < fnic->raw_wq_count; i++) {
 221                 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
 222                 if (error_status)
 223                         shost_printk(KERN_ERR, fnic->lport->host,
 224                                      "WQ[%d] error_status"
 225                                      " %d\n", i, error_status);
 226         }
 227
 228         for (i = 0; i < fnic->rq_count; i++) {
 229                 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
 230                 if (error_status)
 231                         shost_printk(KERN_ERR, fnic->lport->host,
 232                                      "RQ[%d] error_status"
 233                                      " %d\n", i, error_status);
 234         }
 235
 236         for (i = 0; i < fnic->wq_copy_count; i++) {
 237                 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
 238                 if (error_status)
 239                         shost_printk(KERN_ERR, fnic->lport->host,
 240                                      "CWQ[%d] error_status"
 241                                      " %d\n", i, error_status);
 242         }
 243 }
 244
 245 void fnic_handle_link_event(struct fnic *fnic)
 246 {
 247         unsigned long flags;
 248
 249         spin_lock_irqsave(&fnic->fnic_lock, flags);
 250         if (fnic->stop_rx_link_events) {
 251                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 252                 return;
 253         }
 254         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 255
 256         queue_work(fnic_event_queue, &fnic->link_work);
 257
 258 }
 259
 260 static int fnic_notify_set(struct fnic *fnic)
 261 {
 262         int err;
 263
 264         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 265         case VNIC_DEV_INTR_MODE_INTX:
 266                 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
 267                 break;
 268         case VNIC_DEV_INTR_MODE_MSI:
 269                 err = vnic_dev_notify_set(fnic->vdev, -1);
 270                 break;
 271         case VNIC_DEV_INTR_MODE_MSIX:
 272                 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
 273                 break;
 274         default:
 275                 shost_printk(KERN_ERR, fnic->lport->host,
 276                              "Interrupt mode should be set up"
 277                              " before devcmd notify set %d\n",
 278                              vnic_dev_get_intr_mode(fnic->vdev));
 279                 err = -1;
 280                 break;
 281         }
 282
 283         return err;
 284 }
 285
 286 static void fnic_notify_timer(unsigned long data)
 287 {
 288         struct fnic *fnic = (struct fnic *)data;
 289
 290         fnic_handle_link_event(fnic);
 291         mod_timer(&fnic->notify_timer,
 292                   round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
 293 }
 294
 295 static void fnic_notify_timer_start(struct fnic *fnic)
 296 {
 297         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 298         case VNIC_DEV_INTR_MODE_MSI:
 299                 /*
 300                  * Schedule first timeout immediately. The driver is
 301                  * initiatialized and ready to look for link up notification
 302                  */
 303                 mod_timer(&fnic->notify_timer, jiffies);
 304                 break;
 305         default:
 306                 /* Using intr for notification for INTx/MSI-X */
 307                 break;
 308         };
 309 }
 310
 311 static int fnic_dev_wait(struct vnic_dev *vdev,
 312                          int (*start)(struct vnic_dev *, int),
 313                          int (*finished)(struct vnic_dev *, int *),
 314                          int arg)
 315 {
 316         unsigned long time;
 317         int done;
 318         int err;
 319
 320         err = start(vdev, arg);
 321         if (err)
 322                 return err;
 323
 324         /* Wait for func to complete...2 seconds max */
 325         time = jiffies + (HZ * 2);
 326         do {
 327                 err = finished(vdev, &done);
 328                 if (err)
 329                         return err;
 330                 if (done)
 331                         return 0;
 332                 schedule_timeout_uninterruptible(HZ / 10);
 333         } while (time_after(time, jiffies));
 334
 335         return -ETIMEDOUT;
 336 }
 337
 338 static int fnic_cleanup(struct fnic *fnic)
 339 {
 340         unsigned int i;
 341         int err;
 342
 343         vnic_dev_disable(fnic->vdev);
 344         for (i = 0; i < fnic->intr_count; i++)
 345                 vnic_intr_mask(&fnic->intr[i]);
 346
 347         for (i = 0; i < fnic->rq_count; i++) {
 348                 err = vnic_rq_disable(&fnic->rq[i]);
 349                 if (err)
 350                         return err;
 351         }
 352         for (i = 0; i < fnic->raw_wq_count; i++) {
 353                 err = vnic_wq_disable(&fnic->wq[i]);
 354                 if (err)
 355                         return err;
 356         }
 357         for (i = 0; i < fnic->wq_copy_count; i++) {
 358                 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
 359                 if (err)
 360                         return err;
 361         }
 362
 363         /* Clean up completed IOs and FCS frames */
 364         fnic_wq_copy_cmpl_handler(fnic, -1);
 365         fnic_wq_cmpl_handler(fnic, -1);
 366         fnic_rq_cmpl_handler(fnic, -1);
 367
 368         /* Clean up the IOs and FCS frames that have not completed */
 369         for (i = 0; i < fnic->raw_wq_count; i++)
 370                 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
 371         for (i = 0; i < fnic->rq_count; i++)
 372                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 373         for (i = 0; i < fnic->wq_copy_count; i++)
 374                 vnic_wq_copy_clean(&fnic->wq_copy[i],
 375                                    fnic_wq_copy_cleanup_handler);
 376
 377         for (i = 0; i < fnic->cq_count; i++)
 378                 vnic_cq_clean(&fnic->cq[i]);
 379         for (i = 0; i < fnic->intr_count; i++)
 380                 vnic_intr_clean(&fnic->intr[i]);
 381
 382         mempool_destroy(fnic->io_req_pool);
 383         for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
 384                 mempool_destroy(fnic->io_sgl_pool[i]);
 385
 386         return 0;
 387 }
 388
 389 static void fnic_iounmap(struct fnic *fnic)
 390 {
 391         if (fnic->bar0.vaddr)
 392                 iounmap(fnic->bar0.vaddr);
 393 }
 394
 395 /**
 396  * fnic_get_mac() - get assigned data MAC address for FIP code.
 397  * @lport:      local port.
 398  */
 399 static u8 *fnic_get_mac(struct fc_lport *lport)
 400 {
 401         struct fnic *fnic = lport_priv(lport);
 402
 403         return fnic->data_src_addr;
 404 }
 405
 406 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
 407 {
 408         struct Scsi_Host *host;
 409         struct fc_lport *lp;
 410         struct fnic *fnic;
 411         mempool_t *pool;
 412         int err;
 413         int i;
 414         unsigned long flags;
 415
 416         /*
 417          * Allocate SCSI Host and set up association between host,
 418          * local port, and fnic
 419          */
 420         lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic));
 421         if (!lp) {
 422                 printk(KERN_ERR PFX "Unable to alloc libfc local port\n");
 423                 err = -ENOMEM;
 424                 goto err_out;
 425         }
 426         host = lp->host;
 427         fnic = lport_priv(lp);
 428         fnic->lport = lp;
 429         fnic->ctlr.lp = lp;
 430
 431         snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
 432                  host->host_no);
 433
 434         host->transportt = fnic_fc_transport;
 435
 436         err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
 437         if (err) {
 438                 shost_printk(KERN_ERR, fnic->lport->host,
 439                              "Unable to alloc shared tag map\n");
 440                 goto err_out_free_hba;
 441         }
 442
 443         /* Setup PCI resources */
 444         pci_set_drvdata(pdev, fnic);
 445
 446         fnic->pdev = pdev;
 447
 448         err = pci_enable_device(pdev);
 449         if (err) {
 450                 shost_printk(KERN_ERR, fnic->lport->host,
 451                              "Cannot enable PCI device, aborting.\n");
 452                 goto err_out_free_hba;
 453         }
 454
 455         err = pci_request_regions(pdev, DRV_NAME);
 456         if (err) {
 457                 shost_printk(KERN_ERR, fnic->lport->host,
 458                              "Cannot enable PCI resources, aborting\n");
 459                 goto err_out_disable_device;
 460         }
 461
 462         pci_set_master(pdev);
 463
 464         /* Query PCI controller on system for DMA addressing
 465          * limitation for the device.  Try 40-bit first, and
 466          * fail to 32-bit.
 467          */
 468         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
 469         if (err) {
 470                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 471                 if (err) {
 472                         shost_printk(KERN_ERR, fnic->lport->host,
 473                                      "No usable DMA configuration "
 474                                      "aborting\n");
 475                         goto err_out_release_regions;
 476                 }
 477                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 478                 if (err) {
 479                         shost_printk(KERN_ERR, fnic->lport->host,
 480                                      "Unable to obtain 32-bit DMA "
 481                                      "for consistent allocations, aborting.\n");
 482                         goto err_out_release_regions;
 483                 }
 484         } else {
 485                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
 486                 if (err) {
 487                         shost_printk(KERN_ERR, fnic->lport->host,
 488                                      "Unable to obtain 40-bit DMA "
 489                                      "for consistent allocations, aborting.\n");
 490                         goto err_out_release_regions;
 491                 }
 492         }
 493
 494         /* Map vNIC resources from BAR0 */
 495         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
 496                 shost_printk(KERN_ERR, fnic->lport->host,
 497                              "BAR0 not memory-map'able, aborting.\n");
 498                 err = -ENODEV;
 499                 goto err_out_release_regions;
 500         }
 501
 502         fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
 503         fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
 504         fnic->bar0.len = pci_resource_len(pdev, 0);
 505
 506         if (!fnic->bar0.vaddr) {
 507                 shost_printk(KERN_ERR, fnic->lport->host,
 508                              "Cannot memory-map BAR0 res hdr, "
 509                              "aborting.\n");
 510                 err = -ENODEV;
 511                 goto err_out_release_regions;
 512         }
 513
 514         fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
 515         if (!fnic->vdev) {
 516                 shost_printk(KERN_ERR, fnic->lport->host,
 517                              "vNIC registration failed, "
 518                              "aborting.\n");
 519                 err = -ENODEV;
 520                 goto err_out_iounmap;
 521         }
 522
 523         err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
 524                             vnic_dev_open_done, 0);
 525         if (err) {
 526                 shost_printk(KERN_ERR, fnic->lport->host,
 527                              "vNIC dev open failed, aborting.\n");
 528                 goto err_out_vnic_unregister;
 529         }
 530
 531         err = vnic_dev_init(fnic->vdev, 0);
 532         if (err) {
 533                 shost_printk(KERN_ERR, fnic->lport->host,
 534                              "vNIC dev init failed, aborting.\n");
 535                 goto err_out_dev_close;
 536         }
 537
 538         err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
 539         if (err) {
 540                 shost_printk(KERN_ERR, fnic->lport->host,
 541                              "vNIC get MAC addr failed \n");
 542                 goto err_out_dev_close;
 543         }
 544         /* set data_src for point-to-point mode and to keep it non-zero */
 545         memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN);
 546
 547         /* Get vNIC configuration */
 548         err = fnic_get_vnic_config(fnic);
 549         if (err) {
 550                 shost_printk(KERN_ERR, fnic->lport->host,
 551                              "Get vNIC configuration failed, "
 552                              "aborting.\n");
 553                 goto err_out_dev_close;
 554         }
 555         host->max_lun = fnic->config.luns_per_tgt;
 556         host->max_id = FNIC_MAX_FCP_TARGET;
 557         host->max_cmd_len = FCOE_MAX_CMD_LEN;
 558
 559         fnic_get_res_counts(fnic);
 560
 561         err = fnic_set_intr_mode(fnic);
 562         if (err) {
 563                 shost_printk(KERN_ERR, fnic->lport->host,
 564                              "Failed to set intr mode, "
 565                              "aborting.\n");
 566                 goto err_out_dev_close;
 567         }
 568
 569         err = fnic_alloc_vnic_resources(fnic);
 570         if (err) {
 571                 shost_printk(KERN_ERR, fnic->lport->host,
 572                              "Failed to alloc vNIC resources, "
 573                              "aborting.\n");
 574                 goto err_out_clear_intr;
 575         }
 576
 577
 578         /* initialize all fnic locks */
 579         spin_lock_init(&fnic->fnic_lock);
 580
 581         for (i = 0; i < FNIC_WQ_MAX; i++)
 582                 spin_lock_init(&fnic->wq_lock[i]);
 583
 584         for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
 585                 spin_lock_init(&fnic->wq_copy_lock[i]);
 586                 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
 587                 fnic->fw_ack_recd[i] = 0;
 588                 fnic->fw_ack_index[i] = -1;
 589         }
 590
 591         for (i = 0; i < FNIC_IO_LOCKS; i++)
 592                 spin_lock_init(&fnic->io_req_lock[i]);
 593
 594         fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
 595         if (!fnic->io_req_pool)
 596                 goto err_out_free_resources;
 597
 598         pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 599         if (!pool)
 600                 goto err_out_free_ioreq_pool;
 601         fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
 602
 603         pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 604         if (!pool)
 605                 goto err_out_free_dflt_pool;
 606         fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
 607
 608         /* setup vlan config, hw inserts vlan header */
 609         fnic->vlan_hw_insert = 1;
 610         fnic->vlan_id = 0;
 611
 612         /* Initialize the FIP fcoe_ctrl struct */
 613         fnic->ctlr.send = fnic_eth_send;
 614         fnic->ctlr.update_mac = fnic_update_mac;
 615         fnic->ctlr.get_src_addr = fnic_get_mac;
 616         if (fnic->config.flags & VFCF_FIP_CAPABLE) {
 617                 shost_printk(KERN_INFO, fnic->lport->host,
 618                              "firmware supports FIP\n");
 619                 /* enable directed and multicast */
 620                 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0);
 621                 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS);
 622                 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr);
 623                 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO);
 624         } else {
 625                 shost_printk(KERN_INFO, fnic->lport->host,
 626                              "firmware uses non-FIP mode\n");
 627                 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP);
 628         }
 629         fnic->state = FNIC_IN_FC_MODE;
 630
 631         atomic_set(&fnic->in_flight, 0);
 632         fnic->state_flags = FNIC_FLAGS_NONE;
 633
 634         /* Enable hardware stripping of vlan header on ingress */
 635         fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
 636
 637         /* Setup notification buffer area */
 638         err = fnic_notify_set(fnic);
 639         if (err) {
 640                 shost_printk(KERN_ERR, fnic->lport->host,
 641                              "Failed to alloc notify buffer, aborting.\n");
 642                 goto err_out_free_max_pool;
 643         }
 644
 645         /* Setup notify timer when using MSI interrupts */
 646         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 647                 setup_timer(&fnic->notify_timer,
 648                             fnic_notify_timer, (unsigned long)fnic);
 649
 650         /* allocate RQ buffers and post them to RQ*/
 651         for (i = 0; i < fnic->rq_count; i++) {
 652                 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 653                 if (err) {
 654                         shost_printk(KERN_ERR, fnic->lport->host,
 655                                      "fnic_alloc_rq_frame can't alloc "
 656                                      "frame\n");
 657                         goto err_out_free_rq_buf;
 658                 }
 659         }
 660
 661         /*
 662          * Initialization done with PCI system, hardware, firmware.
 663          * Add host to SCSI
 664          */
 665         err = scsi_add_host(lp->host, &pdev->dev);
 666         if (err) {
 667                 shost_printk(KERN_ERR, fnic->lport->host,
 668                              "fnic: scsi_add_host failed...exiting\n");
 669                 goto err_out_free_rq_buf;
 670         }
 671
 672         /* Start local port initiatialization */
 673
 674         lp->link_up = 0;
 675
 676         lp->max_retry_count = fnic->config.flogi_retries;
 677         lp->max_rport_retry_count = fnic->config.plogi_retries;
 678         lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
 679                               FCP_SPPF_CONF_COMPL);
 680         if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
 681                 lp->service_params |= FCP_SPPF_RETRY;
 682
 683         lp->boot_time = jiffies;
 684         lp->e_d_tov = fnic->config.ed_tov;
 685         lp->r_a_tov = fnic->config.ra_tov;
 686         lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
 687         fc_set_wwnn(lp, fnic->config.node_wwn);
 688         fc_set_wwpn(lp, fnic->config.port_wwn);
 689
 690         fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0);
 691
 692         if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
 693                                FCPIO_HOST_EXCH_RANGE_END, NULL)) {
 694                 err = -ENOMEM;
 695                 goto err_out_remove_scsi_host;
 696         }
 697
 698         fc_lport_init_stats(lp);
 699
 700         fc_lport_config(lp);
 701
 702         if (fc_set_mfs(lp, fnic->config.maxdatafieldsize +
 703                        sizeof(struct fc_frame_header))) {
 704                 err = -EINVAL;
 705                 goto err_out_free_exch_mgr;
 706         }
 707         fc_host_maxframe_size(lp->host) = lp->mfs;
 708         fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000;
 709
 710         sprintf(fc_host_symbolic_name(lp->host),
 711                 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
 712
 713         spin_lock_irqsave(&fnic_list_lock, flags);
 714         list_add_tail(&fnic->list, &fnic_list);
 715         spin_unlock_irqrestore(&fnic_list_lock, flags);
 716
 717         INIT_WORK(&fnic->link_work, fnic_handle_link);
 718         INIT_WORK(&fnic->frame_work, fnic_handle_frame);
 719         skb_queue_head_init(&fnic->frame_queue);
 720         skb_queue_head_init(&fnic->tx_queue);
 721
 722         /* Enable all queues */
 723         for (i = 0; i < fnic->raw_wq_count; i++)
 724                 vnic_wq_enable(&fnic->wq[i]);
 725         for (i = 0; i < fnic->rq_count; i++)
 726                 vnic_rq_enable(&fnic->rq[i]);
 727         for (i = 0; i < fnic->wq_copy_count; i++)
 728                 vnic_wq_copy_enable(&fnic->wq_copy[i]);
 729
 730         fc_fabric_login(lp);
 731
 732         vnic_dev_enable(fnic->vdev);
 733
 734         err = fnic_request_intr(fnic);
 735         if (err) {
 736                 shost_printk(KERN_ERR, fnic->lport->host,
 737                              "Unable to request irq.\n");
 738                 goto err_out_free_exch_mgr;
 739         }
 740
 741         for (i = 0; i < fnic->intr_count; i++)
 742                 vnic_intr_unmask(&fnic->intr[i]);
 743
 744         fnic_notify_timer_start(fnic);
 745
 746         return 0;
 747
 748 err_out_free_exch_mgr:
 749         fc_exch_mgr_free(lp);
 750 err_out_remove_scsi_host:
 751         fc_remove_host(lp->host);
 752         scsi_remove_host(lp->host);
 753 err_out_free_rq_buf:
 754         for (i = 0; i < fnic->rq_count; i++)
 755                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 756         vnic_dev_notify_unset(fnic->vdev);
 757 err_out_free_max_pool:
 758         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
 759 err_out_free_dflt_pool:
 760         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
 761 err_out_free_ioreq_pool:
 762         mempool_destroy(fnic->io_req_pool);
 763 err_out_free_resources:
 764         fnic_free_vnic_resources(fnic);
 765 err_out_clear_intr:
 766         fnic_clear_intr_mode(fnic);
 767 err_out_dev_close:
 768         vnic_dev_close(fnic->vdev);
 769 err_out_vnic_unregister:
 770         vnic_dev_unregister(fnic->vdev);
 771 err_out_iounmap:
 772         fnic_iounmap(fnic);
 773 err_out_release_regions:
 774         pci_release_regions(pdev);
 775 err_out_disable_device:
 776         pci_disable_device(pdev);
 777 err_out_free_hba:
 778         scsi_host_put(lp->host);
 779 err_out:
 780         return err;
 781 }
 782
 783 static void fnic_remove(struct pci_dev *pdev)
 784 {
 785         struct fnic *fnic = pci_get_drvdata(pdev);
 786         struct fc_lport *lp = fnic->lport;
 787         unsigned long flags;
 788
 789         /*
 790          * Mark state so that the workqueue thread stops forwarding
 791          * received frames and link events to the local port. ISR and
 792          * other threads that can queue work items will also stop
 793          * creating work items on the fnic workqueue
 794          */
 795         spin_lock_irqsave(&fnic->fnic_lock, flags);
 796         fnic->stop_rx_link_events = 1;
 797         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 798
 799         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 800                 del_timer_sync(&fnic->notify_timer);
 801
 802         /*
 803          * Flush the fnic event queue. After this call, there should
 804          * be no event queued for this fnic device in the workqueue
 805          */
 806         flush_workqueue(fnic_event_queue);
 807         skb_queue_purge(&fnic->frame_queue);
 808         skb_queue_purge(&fnic->tx_queue);
 809
 810         /*
 811          * Log off the fabric. This stops all remote ports, dns port,
 812          * logs off the fabric. This flushes all rport, disc, lport work
 813          * before returning
 814          */
 815         fc_fabric_logoff(fnic->lport);
 816
 817         spin_lock_irqsave(&fnic->fnic_lock, flags);
 818         fnic->in_remove = 1;
 819         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 820
 821         fcoe_ctlr_destroy(&fnic->ctlr);
 822         fc_lport_destroy(lp);
 823
 824         /*
 825          * This stops the fnic device, masks all interrupts. Completed
 826          * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
 827          * cleaned up
 828          */
 829         fnic_cleanup(fnic);
 830
 831         BUG_ON(!skb_queue_empty(&fnic->frame_queue));
 832         BUG_ON(!skb_queue_empty(&fnic->tx_queue));
 833
 834         spin_lock_irqsave(&fnic_list_lock, flags);
 835         list_del(&fnic->list);
 836         spin_unlock_irqrestore(&fnic_list_lock, flags);
 837
 838         fc_remove_host(fnic->lport->host);
 839         scsi_remove_host(fnic->lport->host);
 840         fc_exch_mgr_free(fnic->lport);
 841         vnic_dev_notify_unset(fnic->vdev);
 842         fnic_free_intr(fnic);
 843         fnic_free_vnic_resources(fnic);
 844         fnic_clear_intr_mode(fnic);
 845         vnic_dev_close(fnic->vdev);
 846         vnic_dev_unregister(fnic->vdev);
 847         fnic_iounmap(fnic);
 848         pci_release_regions(pdev);
 849         pci_disable_device(pdev);
 850         pci_set_drvdata(pdev, NULL);
 851         scsi_host_put(lp->host);
 852 }
 853
 854 static struct pci_driver fnic_driver = {
 855         .name = DRV_NAME,
 856         .id_table = fnic_id_table,
 857         .probe = fnic_probe,
 858         .remove = fnic_remove,
 859 };
 860
 861 static int __init fnic_init_module(void)
 862 {
 863         size_t len;
 864         int err = 0;
 865
 866         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
 867
 868         /* Allocate memory for trace buffer */
 869         err = fnic_trace_buf_init();
 870         if (err < 0) {
 871                 printk(KERN_ERR PFX "Trace buffer initialization Failed "
 872                                   "Fnic Tracing utility is disabled\n");
 873                 fnic_trace_free();
 874         }
 875
 876         /* Create a cache for allocation of default size sgls */
 877         len = sizeof(struct fnic_dflt_sgl_list);
 878         fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
 879                 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
 880                  SLAB_HWCACHE_ALIGN,
 881                  NULL);
 882         if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
 883                 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
 884                 err = -ENOMEM;
 885                 goto err_create_fnic_sgl_slab_dflt;
 886         }
 887
 888         /* Create a cache for allocation of max size sgls*/
 889         len = sizeof(struct fnic_sgl_list);
 890         fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
 891                 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
 892                  SLAB_HWCACHE_ALIGN,
 893                  NULL);
 894         if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
 895                 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
 896                 err = -ENOMEM;
 897                 goto err_create_fnic_sgl_slab_max;
 898         }
 899
 900         /* Create a cache of io_req structs for use via mempool */
 901         fnic_io_req_cache = kmem_cache_create("fnic_io_req",
 902                                               sizeof(struct fnic_io_req),
 903                                               0, SLAB_HWCACHE_ALIGN, NULL);
 904         if (!fnic_io_req_cache) {
 905                 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
 906                 err = -ENOMEM;
 907                 goto err_create_fnic_ioreq_slab;
 908         }
 909
 910         fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
 911         if (!fnic_event_queue) {
 912                 printk(KERN_ERR PFX "fnic work queue create failed\n");
 913                 err = -ENOMEM;
 914                 goto err_create_fnic_workq;
 915         }
 916
 917         spin_lock_init(&fnic_list_lock);
 918         INIT_LIST_HEAD(&fnic_list);
 919
 920         fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
 921         if (!fnic_fc_transport) {
 922                 printk(KERN_ERR PFX "fc_attach_transport error\n");
 923                 err = -ENOMEM;
 924                 goto err_fc_transport;
 925         }
 926
 927         /* register the driver with PCI system */
 928         err = pci_register_driver(&fnic_driver);
 929         if (err < 0) {
 930                 printk(KERN_ERR PFX "pci register error\n");
 931                 goto err_pci_register;
 932         }
 933         return err;
 934
 935 err_pci_register:
 936         fc_release_transport(fnic_fc_transport);
 937 err_fc_transport:
 938         destroy_workqueue(fnic_event_queue);
 939 err_create_fnic_workq:
 940         kmem_cache_destroy(fnic_io_req_cache);
 941 err_create_fnic_ioreq_slab:
 942         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 943 err_create_fnic_sgl_slab_max:
 944         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 945 err_create_fnic_sgl_slab_dflt:
 946         fnic_trace_free();
 947         return err;
 948 }
 949
 950 static void __exit fnic_cleanup_module(void)
 951 {
 952         pci_unregister_driver(&fnic_driver);
 953         destroy_workqueue(fnic_event_queue);
 954         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 955         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 956         kmem_cache_destroy(fnic_io_req_cache);
 957         fc_release_transport(fnic_fc_transport);
 958         fnic_trace_free();
 959 }
 960
 961 module_init(fnic_init_module);
 962 module_exit(fnic_cleanup_module);
 963