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/errno.h>
  22 #include <linux/init.h>
  23 #include <linux/pci.h>
  24 #include <linux/skbuff.h>
  25 #include <linux/interrupt.h>
  26 #include <linux/spinlock.h>
  27 #include <linux/workqueue.h>
  28 #include <scsi/scsi_host.h>
  29 #include <scsi/scsi_transport.h>
  30 #include <scsi/scsi_transport_fc.h>
  31 #include <scsi/scsi_tcq.h>
  32 #include <scsi/libfc.h>
  33 #include <scsi/fc_frame.h>
  34
  35 #include "vnic_dev.h"
  36 #include "vnic_intr.h"
  37 #include "vnic_stats.h"
  38 #include "fnic_io.h"
  39 #include "fnic.h"
  40
  41 #define PCI_DEVICE_ID_CISCO_FNIC        0x0045
  42
  43 /* Timer to poll notification area for events. Used for MSI interrupts */
  44 #define FNIC_NOTIFY_TIMER_PERIOD        (2 * HZ)
  45
  46 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES];
  47 static struct kmem_cache *fnic_io_req_cache;
  48 LIST_HEAD(fnic_list);
  49 DEFINE_SPINLOCK(fnic_list_lock);
  50
  51 /* Supported devices by fnic module */
  52 static struct pci_device_id fnic_id_table[] = {
  53         { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) },
  54         { 0, }
  55 };
  56
  57 MODULE_DESCRIPTION(DRV_DESCRIPTION);
  58 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, "
  59               "Joseph R. Eykholt <jeykholt@cisco.com>");
  60 MODULE_LICENSE("GPL v2");
  61 MODULE_VERSION(DRV_VERSION);
  62 MODULE_DEVICE_TABLE(pci, fnic_id_table);
  63
  64 unsigned int fnic_log_level;
  65 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR);
  66 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels");
  67
  68
  69 static struct libfc_function_template fnic_transport_template = {
  70         .frame_send = fnic_send,
  71         .fcp_abort_io = fnic_empty_scsi_cleanup,
  72         .fcp_cleanup = fnic_empty_scsi_cleanup,
  73         .exch_mgr_reset = fnic_exch_mgr_reset
  74 };
  75
  76 static int fnic_slave_alloc(struct scsi_device *sdev)
  77 {
  78         struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
  79         struct fc_lport *lp = shost_priv(sdev->host);
  80         struct fnic *fnic = lport_priv(lp);
  81
  82         sdev->tagged_supported = 1;
  83
  84         if (!rport || fc_remote_port_chkready(rport))
  85                 return -ENXIO;
  86
  87         scsi_activate_tcq(sdev, FNIC_DFLT_QUEUE_DEPTH);
  88         rport->dev_loss_tmo = fnic->config.port_down_timeout / 1000;
  89
  90         return 0;
  91 }
  92
  93 static struct scsi_host_template fnic_host_template = {
  94         .module = THIS_MODULE,
  95         .name = DRV_NAME,
  96         .queuecommand = fnic_queuecommand,
  97         .eh_abort_handler = fnic_abort_cmd,
  98         .eh_device_reset_handler = fnic_device_reset,
  99         .eh_host_reset_handler = fnic_host_reset,
 100         .slave_alloc = fnic_slave_alloc,
 101         .change_queue_depth = fc_change_queue_depth,
 102         .change_queue_type = fc_change_queue_type,
 103         .this_id = -1,
 104         .cmd_per_lun = 3,
 105         .can_queue = FNIC_MAX_IO_REQ,
 106         .use_clustering = ENABLE_CLUSTERING,
 107         .sg_tablesize = FNIC_MAX_SG_DESC_CNT,
 108         .max_sectors = 0xffff,
 109         .shost_attrs = fnic_attrs,
 110 };
 111
 112 static void fnic_get_host_speed(struct Scsi_Host *shost);
 113 static struct scsi_transport_template *fnic_fc_transport;
 114 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *);
 115
 116 static struct fc_function_template fnic_fc_functions = {
 117
 118         .show_host_node_name = 1,
 119         .show_host_port_name = 1,
 120         .show_host_supported_classes = 1,
 121         .show_host_supported_fc4s = 1,
 122         .show_host_active_fc4s = 1,
 123         .show_host_maxframe_size = 1,
 124         .show_host_port_id = 1,
 125         .show_host_supported_speeds = 1,
 126         .get_host_speed = fnic_get_host_speed,
 127         .show_host_speed = 1,
 128         .show_host_port_type = 1,
 129         .get_host_port_state = fc_get_host_port_state,
 130         .show_host_port_state = 1,
 131         .show_host_symbolic_name = 1,
 132         .show_rport_maxframe_size = 1,
 133         .show_rport_supported_classes = 1,
 134         .show_host_fabric_name = 1,
 135         .show_starget_node_name = 1,
 136         .show_starget_port_name = 1,
 137         .show_starget_port_id = 1,
 138         .show_rport_dev_loss_tmo = 1,
 139         .issue_fc_host_lip = fnic_reset,
 140         .get_fc_host_stats = fnic_get_stats,
 141         .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv),
 142         .terminate_rport_io = fnic_terminate_rport_io,
 143 };
 144
 145 static void fnic_get_host_speed(struct Scsi_Host *shost)
 146 {
 147         struct fc_lport *lp = shost_priv(shost);
 148         struct fnic *fnic = lport_priv(lp);
 149         u32 port_speed = vnic_dev_port_speed(fnic->vdev);
 150
 151         /* Add in other values as they get defined in fw */
 152         switch (port_speed) {
 153         case 10000:
 154                 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
 155                 break;
 156         default:
 157                 fc_host_speed(shost) = FC_PORTSPEED_10GBIT;
 158                 break;
 159         }
 160 }
 161
 162 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host)
 163 {
 164         int ret;
 165         struct fc_lport *lp = shost_priv(host);
 166         struct fnic *fnic = lport_priv(lp);
 167         struct fc_host_statistics *stats = &lp->host_stats;
 168         struct vnic_stats *vs;
 169         unsigned long flags;
 170
 171         if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT))
 172                 return stats;
 173         fnic->stats_time = jiffies;
 174
 175         spin_lock_irqsave(&fnic->fnic_lock, flags);
 176         ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats);
 177         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 178
 179         if (ret) {
 180                 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host,
 181                               "fnic: Get vnic stats failed"
 182                               " 0x%x", ret);
 183                 return stats;
 184         }
 185         vs = fnic->stats;
 186         stats->tx_frames = vs->tx.tx_unicast_frames_ok;
 187         stats->tx_words  = vs->tx.tx_unicast_bytes_ok / 4;
 188         stats->rx_frames = vs->rx.rx_unicast_frames_ok;
 189         stats->rx_words  = vs->rx.rx_unicast_bytes_ok / 4;
 190         stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors;
 191         stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop;
 192         stats->invalid_crc_count = vs->rx.rx_crc_errors;
 193         stats->seconds_since_last_reset = (jiffies - lp->boot_time) / HZ;
 194         stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000);
 195         stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000);
 196
 197         return stats;
 198 }
 199
 200 void fnic_log_q_error(struct fnic *fnic)
 201 {
 202         unsigned int i;
 203         u32 error_status;
 204
 205         for (i = 0; i < fnic->raw_wq_count; i++) {
 206                 error_status = ioread32(&fnic->wq[i].ctrl->error_status);
 207                 if (error_status)
 208                         shost_printk(KERN_ERR, fnic->lport->host,
 209                                      "WQ[%d] error_status"
 210                                      " %d\n", i, error_status);
 211         }
 212
 213         for (i = 0; i < fnic->rq_count; i++) {
 214                 error_status = ioread32(&fnic->rq[i].ctrl->error_status);
 215                 if (error_status)
 216                         shost_printk(KERN_ERR, fnic->lport->host,
 217                                      "RQ[%d] error_status"
 218                                      " %d\n", i, error_status);
 219         }
 220
 221         for (i = 0; i < fnic->wq_copy_count; i++) {
 222                 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status);
 223                 if (error_status)
 224                         shost_printk(KERN_ERR, fnic->lport->host,
 225                                      "CWQ[%d] error_status"
 226                                      " %d\n", i, error_status);
 227         }
 228 }
 229
 230 void fnic_handle_link_event(struct fnic *fnic)
 231 {
 232         unsigned long flags;
 233
 234         spin_lock_irqsave(&fnic->fnic_lock, flags);
 235         if (fnic->stop_rx_link_events) {
 236                 spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 237                 return;
 238         }
 239         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 240
 241         queue_work(fnic_event_queue, &fnic->link_work);
 242
 243 }
 244
 245 static int fnic_notify_set(struct fnic *fnic)
 246 {
 247         int err;
 248
 249         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 250         case VNIC_DEV_INTR_MODE_INTX:
 251                 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY);
 252                 break;
 253         case VNIC_DEV_INTR_MODE_MSI:
 254                 err = vnic_dev_notify_set(fnic->vdev, -1);
 255                 break;
 256         case VNIC_DEV_INTR_MODE_MSIX:
 257                 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY);
 258                 break;
 259         default:
 260                 shost_printk(KERN_ERR, fnic->lport->host,
 261                              "Interrupt mode should be set up"
 262                              " before devcmd notify set %d\n",
 263                              vnic_dev_get_intr_mode(fnic->vdev));
 264                 err = -1;
 265                 break;
 266         }
 267
 268         return err;
 269 }
 270
 271 static void fnic_notify_timer(unsigned long data)
 272 {
 273         struct fnic *fnic = (struct fnic *)data;
 274
 275         fnic_handle_link_event(fnic);
 276         mod_timer(&fnic->notify_timer,
 277                   round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD));
 278 }
 279
 280 static void fnic_notify_timer_start(struct fnic *fnic)
 281 {
 282         switch (vnic_dev_get_intr_mode(fnic->vdev)) {
 283         case VNIC_DEV_INTR_MODE_MSI:
 284                 /*
 285                  * Schedule first timeout immediately. The driver is
 286                  * initiatialized and ready to look for link up notification
 287                  */
 288                 mod_timer(&fnic->notify_timer, jiffies);
 289                 break;
 290         default:
 291                 /* Using intr for notification for INTx/MSI-X */
 292                 break;
 293         };
 294 }
 295
 296 static int fnic_dev_wait(struct vnic_dev *vdev,
 297                          int (*start)(struct vnic_dev *, int),
 298                          int (*finished)(struct vnic_dev *, int *),
 299                          int arg)
 300 {
 301         unsigned long time;
 302         int done;
 303         int err;
 304
 305         err = start(vdev, arg);
 306         if (err)
 307                 return err;
 308
 309         /* Wait for func to complete...2 seconds max */
 310         time = jiffies + (HZ * 2);
 311         do {
 312                 err = finished(vdev, &done);
 313                 if (err)
 314                         return err;
 315                 if (done)
 316                         return 0;
 317                 schedule_timeout_uninterruptible(HZ / 10);
 318         } while (time_after(time, jiffies));
 319
 320         return -ETIMEDOUT;
 321 }
 322
 323 static int fnic_cleanup(struct fnic *fnic)
 324 {
 325         unsigned int i;
 326         int err;
 327         unsigned long flags;
 328         struct fc_frame *flogi = NULL;
 329         struct fc_frame *flogi_resp = NULL;
 330
 331         vnic_dev_disable(fnic->vdev);
 332         for (i = 0; i < fnic->intr_count; i++)
 333                 vnic_intr_mask(&fnic->intr[i]);
 334
 335         for (i = 0; i < fnic->rq_count; i++) {
 336                 err = vnic_rq_disable(&fnic->rq[i]);
 337                 if (err)
 338                         return err;
 339         }
 340         for (i = 0; i < fnic->raw_wq_count; i++) {
 341                 err = vnic_wq_disable(&fnic->wq[i]);
 342                 if (err)
 343                         return err;
 344         }
 345         for (i = 0; i < fnic->wq_copy_count; i++) {
 346                 err = vnic_wq_copy_disable(&fnic->wq_copy[i]);
 347                 if (err)
 348                         return err;
 349         }
 350
 351         /* Clean up completed IOs and FCS frames */
 352         fnic_wq_copy_cmpl_handler(fnic, -1);
 353         fnic_wq_cmpl_handler(fnic, -1);
 354         fnic_rq_cmpl_handler(fnic, -1);
 355
 356         /* Clean up the IOs and FCS frames that have not completed */
 357         for (i = 0; i < fnic->raw_wq_count; i++)
 358                 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf);
 359         for (i = 0; i < fnic->rq_count; i++)
 360                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 361         for (i = 0; i < fnic->wq_copy_count; i++)
 362                 vnic_wq_copy_clean(&fnic->wq_copy[i],
 363                                    fnic_wq_copy_cleanup_handler);
 364
 365         for (i = 0; i < fnic->cq_count; i++)
 366                 vnic_cq_clean(&fnic->cq[i]);
 367         for (i = 0; i < fnic->intr_count; i++)
 368                 vnic_intr_clean(&fnic->intr[i]);
 369
 370         /*
 371          * Remove cached flogi and flogi resp frames if any
 372          * These frames are not in any queue, and therefore queue
 373          * cleanup does not clean them. So clean them explicitly
 374          */
 375         spin_lock_irqsave(&fnic->fnic_lock, flags);
 376         flogi = fnic->flogi;
 377         fnic->flogi = NULL;
 378         flogi_resp = fnic->flogi_resp;
 379         fnic->flogi_resp = NULL;
 380         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 381
 382         if (flogi)
 383                 dev_kfree_skb(fp_skb(flogi));
 384
 385         if (flogi_resp)
 386                 dev_kfree_skb(fp_skb(flogi_resp));
 387
 388         mempool_destroy(fnic->io_req_pool);
 389         for (i = 0; i < FNIC_SGL_NUM_CACHES; i++)
 390                 mempool_destroy(fnic->io_sgl_pool[i]);
 391
 392         return 0;
 393 }
 394
 395 static void fnic_iounmap(struct fnic *fnic)
 396 {
 397         if (fnic->bar0.vaddr)
 398                 iounmap(fnic->bar0.vaddr);
 399 }
 400
 401 /*
 402  * Allocate element for mempools requiring GFP_DMA flag.
 403  * Otherwise, checks in kmem_flagcheck() hit BUG_ON().
 404  */
 405 static void *fnic_alloc_slab_dma(gfp_t gfp_mask, void *pool_data)
 406 {
 407         struct kmem_cache *mem = pool_data;
 408
 409         return kmem_cache_alloc(mem, gfp_mask | GFP_ATOMIC | GFP_DMA);
 410 }
 411
 412 static int __devinit fnic_probe(struct pci_dev *pdev,
 413                                 const struct pci_device_id *ent)
 414 {
 415         struct Scsi_Host *host;
 416         struct fc_lport *lp;
 417         struct fnic *fnic;
 418         mempool_t *pool;
 419         int err;
 420         int i;
 421         unsigned long flags;
 422
 423         /*
 424          * Allocate SCSI Host and set up association between host,
 425          * local port, and fnic
 426          */
 427         host = scsi_host_alloc(&fnic_host_template,
 428                                sizeof(struct fc_lport) + sizeof(struct fnic));
 429         if (!host) {
 430                 printk(KERN_ERR PFX "Unable to alloc SCSI host\n");
 431                 err = -ENOMEM;
 432                 goto err_out;
 433         }
 434         lp = shost_priv(host);
 435         lp->host = host;
 436         fnic = lport_priv(lp);
 437         fnic->lport = lp;
 438
 439         snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME,
 440                  host->host_no);
 441
 442         host->transportt = fnic_fc_transport;
 443
 444         err = scsi_init_shared_tag_map(host, FNIC_MAX_IO_REQ);
 445         if (err) {
 446                 shost_printk(KERN_ERR, fnic->lport->host,
 447                              "Unable to alloc shared tag map\n");
 448                 goto err_out_free_hba;
 449         }
 450
 451         /* Setup PCI resources */
 452         pci_set_drvdata(pdev, fnic);
 453
 454         fnic->pdev = pdev;
 455
 456         err = pci_enable_device(pdev);
 457         if (err) {
 458                 shost_printk(KERN_ERR, fnic->lport->host,
 459                              "Cannot enable PCI device, aborting.\n");
 460                 goto err_out_free_hba;
 461         }
 462
 463         err = pci_request_regions(pdev, DRV_NAME);
 464         if (err) {
 465                 shost_printk(KERN_ERR, fnic->lport->host,
 466                              "Cannot enable PCI resources, aborting\n");
 467                 goto err_out_disable_device;
 468         }
 469
 470         pci_set_master(pdev);
 471
 472         /* Query PCI controller on system for DMA addressing
 473          * limitation for the device.  Try 40-bit first, and
 474          * fail to 32-bit.
 475          */
 476         err = pci_set_dma_mask(pdev, DMA_BIT_MASK(40));
 477         if (err) {
 478                 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32));
 479                 if (err) {
 480                         shost_printk(KERN_ERR, fnic->lport->host,
 481                                      "No usable DMA configuration "
 482                                      "aborting\n");
 483                         goto err_out_release_regions;
 484                 }
 485                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32));
 486                 if (err) {
 487                         shost_printk(KERN_ERR, fnic->lport->host,
 488                                      "Unable to obtain 32-bit DMA "
 489                                      "for consistent allocations, aborting.\n");
 490                         goto err_out_release_regions;
 491                 }
 492         } else {
 493                 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(40));
 494                 if (err) {
 495                         shost_printk(KERN_ERR, fnic->lport->host,
 496                                      "Unable to obtain 40-bit DMA "
 497                                      "for consistent allocations, aborting.\n");
 498                         goto err_out_release_regions;
 499                 }
 500         }
 501
 502         /* Map vNIC resources from BAR0 */
 503         if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) {
 504                 shost_printk(KERN_ERR, fnic->lport->host,
 505                              "BAR0 not memory-map'able, aborting.\n");
 506                 err = -ENODEV;
 507                 goto err_out_release_regions;
 508         }
 509
 510         fnic->bar0.vaddr = pci_iomap(pdev, 0, 0);
 511         fnic->bar0.bus_addr = pci_resource_start(pdev, 0);
 512         fnic->bar0.len = pci_resource_len(pdev, 0);
 513
 514         if (!fnic->bar0.vaddr) {
 515                 shost_printk(KERN_ERR, fnic->lport->host,
 516                              "Cannot memory-map BAR0 res hdr, "
 517                              "aborting.\n");
 518                 err = -ENODEV;
 519                 goto err_out_release_regions;
 520         }
 521
 522         fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0);
 523         if (!fnic->vdev) {
 524                 shost_printk(KERN_ERR, fnic->lport->host,
 525                              "vNIC registration failed, "
 526                              "aborting.\n");
 527                 err = -ENODEV;
 528                 goto err_out_iounmap;
 529         }
 530
 531         err = fnic_dev_wait(fnic->vdev, vnic_dev_open,
 532                             vnic_dev_open_done, 0);
 533         if (err) {
 534                 shost_printk(KERN_ERR, fnic->lport->host,
 535                              "vNIC dev open failed, aborting.\n");
 536                 goto err_out_vnic_unregister;
 537         }
 538
 539         err = vnic_dev_init(fnic->vdev, 0);
 540         if (err) {
 541                 shost_printk(KERN_ERR, fnic->lport->host,
 542                              "vNIC dev init failed, aborting.\n");
 543                 goto err_out_dev_close;
 544         }
 545
 546         err = vnic_dev_mac_addr(fnic->vdev, fnic->mac_addr);
 547         if (err) {
 548                 shost_printk(KERN_ERR, fnic->lport->host,
 549                              "vNIC get MAC addr failed \n");
 550                 goto err_out_dev_close;
 551         }
 552
 553         /* Get vNIC configuration */
 554         err = fnic_get_vnic_config(fnic);
 555         if (err) {
 556                 shost_printk(KERN_ERR, fnic->lport->host,
 557                              "Get vNIC configuration failed, "
 558                              "aborting.\n");
 559                 goto err_out_dev_close;
 560         }
 561         host->max_lun = fnic->config.luns_per_tgt;
 562         host->max_id = FNIC_MAX_FCP_TARGET;
 563
 564         fnic_get_res_counts(fnic);
 565
 566         err = fnic_set_intr_mode(fnic);
 567         if (err) {
 568                 shost_printk(KERN_ERR, fnic->lport->host,
 569                              "Failed to set intr mode, "
 570                              "aborting.\n");
 571                 goto err_out_dev_close;
 572         }
 573
 574         err = fnic_request_intr(fnic);
 575         if (err) {
 576                 shost_printk(KERN_ERR, fnic->lport->host,
 577                              "Unable to request irq.\n");
 578                 goto err_out_clear_intr;
 579         }
 580
 581         err = fnic_alloc_vnic_resources(fnic);
 582         if (err) {
 583                 shost_printk(KERN_ERR, fnic->lport->host,
 584                              "Failed to alloc vNIC resources, "
 585                              "aborting.\n");
 586                 goto err_out_free_intr;
 587         }
 588
 589
 590         /* initialize all fnic locks */
 591         spin_lock_init(&fnic->fnic_lock);
 592
 593         for (i = 0; i < FNIC_WQ_MAX; i++)
 594                 spin_lock_init(&fnic->wq_lock[i]);
 595
 596         for (i = 0; i < FNIC_WQ_COPY_MAX; i++) {
 597                 spin_lock_init(&fnic->wq_copy_lock[i]);
 598                 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK;
 599                 fnic->fw_ack_recd[i] = 0;
 600                 fnic->fw_ack_index[i] = -1;
 601         }
 602
 603         for (i = 0; i < FNIC_IO_LOCKS; i++)
 604                 spin_lock_init(&fnic->io_req_lock[i]);
 605
 606         fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache);
 607         if (!fnic->io_req_pool)
 608                 goto err_out_free_resources;
 609
 610         pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
 611                               fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 612         if (!pool)
 613                 goto err_out_free_ioreq_pool;
 614         fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool;
 615
 616         pool = mempool_create(2, fnic_alloc_slab_dma, mempool_free_slab,
 617                               fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 618         if (!pool)
 619                 goto err_out_free_dflt_pool;
 620         fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool;
 621
 622         /* setup vlan config, hw inserts vlan header */
 623         fnic->vlan_hw_insert = 1;
 624         fnic->vlan_id = 0;
 625
 626         fnic->flogi_oxid = FC_XID_UNKNOWN;
 627         fnic->flogi = NULL;
 628         fnic->flogi_resp = NULL;
 629         fnic->state = FNIC_IN_FC_MODE;
 630
 631         /* Enable hardware stripping of vlan header on ingress */
 632         fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1);
 633
 634         /* Setup notification buffer area */
 635         err = fnic_notify_set(fnic);
 636         if (err) {
 637                 shost_printk(KERN_ERR, fnic->lport->host,
 638                              "Failed to alloc notify buffer, aborting.\n");
 639                 goto err_out_free_max_pool;
 640         }
 641
 642         /* Setup notify timer when using MSI interrupts */
 643         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 644                 setup_timer(&fnic->notify_timer,
 645                             fnic_notify_timer, (unsigned long)fnic);
 646
 647         /* allocate RQ buffers and post them to RQ*/
 648         for (i = 0; i < fnic->rq_count; i++) {
 649                 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame);
 650                 if (err) {
 651                         shost_printk(KERN_ERR, fnic->lport->host,
 652                                      "fnic_alloc_rq_frame can't alloc "
 653                                      "frame\n");
 654                         goto err_out_free_rq_buf;
 655                 }
 656         }
 657
 658         /*
 659          * Initialization done with PCI system, hardware, firmware.
 660          * Add host to SCSI
 661          */
 662         err = scsi_add_host(lp->host, &pdev->dev);
 663         if (err) {
 664                 shost_printk(KERN_ERR, fnic->lport->host,
 665                              "fnic: scsi_add_host failed...exiting\n");
 666                 goto err_out_free_rq_buf;
 667         }
 668
 669         /* Start local port initiatialization */
 670
 671         lp->link_up = 0;
 672         lp->tt = fnic_transport_template;
 673
 674         lp->max_retry_count = fnic->config.flogi_retries;
 675         lp->max_rport_retry_count = fnic->config.plogi_retries;
 676         lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS |
 677                               FCP_SPPF_CONF_COMPL);
 678         if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR)
 679                 lp->service_params |= FCP_SPPF_RETRY;
 680
 681         lp->boot_time = jiffies;
 682         lp->e_d_tov = fnic->config.ed_tov;
 683         lp->r_a_tov = fnic->config.ra_tov;
 684         lp->link_supported_speeds = FC_PORTSPEED_10GBIT;
 685         fc_set_wwnn(lp, fnic->config.node_wwn);
 686         fc_set_wwpn(lp, fnic->config.port_wwn);
 687
 688         fc_lport_init(lp);
 689         fc_exch_init(lp);
 690         fc_elsct_init(lp);
 691         fc_rport_init(lp);
 692         fc_disc_init(lp);
 693
 694         if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START,
 695                                FCPIO_HOST_EXCH_RANGE_END, NULL)) {
 696                 err = -ENOMEM;
 697                 goto err_out_remove_scsi_host;
 698         }
 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
 709         sprintf(fc_host_symbolic_name(lp->host),
 710                 DRV_NAME " v" DRV_VERSION " over %s", fnic->name);
 711
 712         spin_lock_irqsave(&fnic_list_lock, flags);
 713         list_add_tail(&fnic->list, &fnic_list);
 714         spin_unlock_irqrestore(&fnic_list_lock, flags);
 715
 716         INIT_WORK(&fnic->link_work, fnic_handle_link);
 717         INIT_WORK(&fnic->frame_work, fnic_handle_frame);
 718         skb_queue_head_init(&fnic->frame_queue);
 719
 720         /* Enable all queues */
 721         for (i = 0; i < fnic->raw_wq_count; i++)
 722                 vnic_wq_enable(&fnic->wq[i]);
 723         for (i = 0; i < fnic->rq_count; i++)
 724                 vnic_rq_enable(&fnic->rq[i]);
 725         for (i = 0; i < fnic->wq_copy_count; i++)
 726                 vnic_wq_copy_enable(&fnic->wq_copy[i]);
 727
 728         fc_fabric_login(lp);
 729
 730         vnic_dev_enable(fnic->vdev);
 731         for (i = 0; i < fnic->intr_count; i++)
 732                 vnic_intr_unmask(&fnic->intr[i]);
 733
 734         fnic_notify_timer_start(fnic);
 735
 736         return 0;
 737
 738 err_out_free_exch_mgr:
 739         fc_exch_mgr_free(lp);
 740 err_out_remove_scsi_host:
 741         fc_remove_host(fnic->lport->host);
 742         scsi_remove_host(fnic->lport->host);
 743 err_out_free_rq_buf:
 744         for (i = 0; i < fnic->rq_count; i++)
 745                 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf);
 746         vnic_dev_notify_unset(fnic->vdev);
 747 err_out_free_max_pool:
 748         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]);
 749 err_out_free_dflt_pool:
 750         mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]);
 751 err_out_free_ioreq_pool:
 752         mempool_destroy(fnic->io_req_pool);
 753 err_out_free_resources:
 754         fnic_free_vnic_resources(fnic);
 755 err_out_free_intr:
 756         fnic_free_intr(fnic);
 757 err_out_clear_intr:
 758         fnic_clear_intr_mode(fnic);
 759 err_out_dev_close:
 760         vnic_dev_close(fnic->vdev);
 761 err_out_vnic_unregister:
 762         vnic_dev_unregister(fnic->vdev);
 763 err_out_iounmap:
 764         fnic_iounmap(fnic);
 765 err_out_release_regions:
 766         pci_release_regions(pdev);
 767 err_out_disable_device:
 768         pci_disable_device(pdev);
 769 err_out_free_hba:
 770         scsi_host_put(lp->host);
 771 err_out:
 772         return err;
 773 }
 774
 775 static void __devexit fnic_remove(struct pci_dev *pdev)
 776 {
 777         struct fnic *fnic = pci_get_drvdata(pdev);
 778         unsigned long flags;
 779
 780         /*
 781          * Mark state so that the workqueue thread stops forwarding
 782          * received frames and link events to the local port. ISR and
 783          * other threads that can queue work items will also stop
 784          * creating work items on the fnic workqueue
 785          */
 786         spin_lock_irqsave(&fnic->fnic_lock, flags);
 787         fnic->stop_rx_link_events = 1;
 788         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 789
 790         if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI)
 791                 del_timer_sync(&fnic->notify_timer);
 792
 793         /*
 794          * Flush the fnic event queue. After this call, there should
 795          * be no event queued for this fnic device in the workqueue
 796          */
 797         flush_workqueue(fnic_event_queue);
 798         skb_queue_purge(&fnic->frame_queue);
 799
 800         /*
 801          * Log off the fabric. This stops all remote ports, dns port,
 802          * logs off the fabric. This flushes all rport, disc, lport work
 803          * before returning
 804          */
 805         fc_fabric_logoff(fnic->lport);
 806
 807         spin_lock_irqsave(&fnic->fnic_lock, flags);
 808         fnic->in_remove = 1;
 809         spin_unlock_irqrestore(&fnic->fnic_lock, flags);
 810
 811         fc_lport_destroy(fnic->lport);
 812
 813         /*
 814          * This stops the fnic device, masks all interrupts. Completed
 815          * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are
 816          * cleaned up
 817          */
 818         fnic_cleanup(fnic);
 819
 820         BUG_ON(!skb_queue_empty(&fnic->frame_queue));
 821
 822         spin_lock_irqsave(&fnic_list_lock, flags);
 823         list_del(&fnic->list);
 824         spin_unlock_irqrestore(&fnic_list_lock, flags);
 825
 826         fc_remove_host(fnic->lport->host);
 827         scsi_remove_host(fnic->lport->host);
 828         fc_exch_mgr_free(fnic->lport);
 829         vnic_dev_notify_unset(fnic->vdev);
 830         fnic_free_vnic_resources(fnic);
 831         fnic_free_intr(fnic);
 832         fnic_clear_intr_mode(fnic);
 833         vnic_dev_close(fnic->vdev);
 834         vnic_dev_unregister(fnic->vdev);
 835         fnic_iounmap(fnic);
 836         pci_release_regions(pdev);
 837         pci_disable_device(pdev);
 838         pci_set_drvdata(pdev, NULL);
 839         scsi_host_put(fnic->lport->host);
 840 }
 841
 842 static struct pci_driver fnic_driver = {
 843         .name = DRV_NAME,
 844         .id_table = fnic_id_table,
 845         .probe = fnic_probe,
 846         .remove = __devexit_p(fnic_remove),
 847 };
 848
 849 static int __init fnic_init_module(void)
 850 {
 851         size_t len;
 852         int err = 0;
 853
 854         printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION);
 855
 856         /* Create a cache for allocation of default size sgls */
 857         len = sizeof(struct fnic_dflt_sgl_list);
 858         fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create
 859                 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
 860                  SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
 861                  NULL);
 862         if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) {
 863                 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n");
 864                 err = -ENOMEM;
 865                 goto err_create_fnic_sgl_slab_dflt;
 866         }
 867
 868         /* Create a cache for allocation of max size sgls*/
 869         len = sizeof(struct fnic_sgl_list);
 870         fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create
 871                 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN,
 872                  SLAB_HWCACHE_ALIGN | SLAB_CACHE_DMA,
 873                  NULL);
 874         if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) {
 875                 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n");
 876                 err = -ENOMEM;
 877                 goto err_create_fnic_sgl_slab_max;
 878         }
 879
 880         /* Create a cache of io_req structs for use via mempool */
 881         fnic_io_req_cache = kmem_cache_create("fnic_io_req",
 882                                               sizeof(struct fnic_io_req),
 883                                               0, SLAB_HWCACHE_ALIGN, NULL);
 884         if (!fnic_io_req_cache) {
 885                 printk(KERN_ERR PFX "failed to create fnic io_req slab\n");
 886                 err = -ENOMEM;
 887                 goto err_create_fnic_ioreq_slab;
 888         }
 889
 890         fnic_event_queue = create_singlethread_workqueue("fnic_event_wq");
 891         if (!fnic_event_queue) {
 892                 printk(KERN_ERR PFX "fnic work queue create failed\n");
 893                 err = -ENOMEM;
 894                 goto err_create_fnic_workq;
 895         }
 896
 897         spin_lock_init(&fnic_list_lock);
 898         INIT_LIST_HEAD(&fnic_list);
 899
 900         fnic_fc_transport = fc_attach_transport(&fnic_fc_functions);
 901         if (!fnic_fc_transport) {
 902                 printk(KERN_ERR PFX "fc_attach_transport error\n");
 903                 err = -ENOMEM;
 904                 goto err_fc_transport;
 905         }
 906
 907         /* register the driver with PCI system */
 908         err = pci_register_driver(&fnic_driver);
 909         if (err < 0) {
 910                 printk(KERN_ERR PFX "pci register error\n");
 911                 goto err_pci_register;
 912         }
 913         return err;
 914
 915 err_pci_register:
 916         fc_release_transport(fnic_fc_transport);
 917 err_fc_transport:
 918         destroy_workqueue(fnic_event_queue);
 919 err_create_fnic_workq:
 920         kmem_cache_destroy(fnic_io_req_cache);
 921 err_create_fnic_ioreq_slab:
 922         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 923 err_create_fnic_sgl_slab_max:
 924         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 925 err_create_fnic_sgl_slab_dflt:
 926         return err;
 927 }
 928
 929 static void __exit fnic_cleanup_module(void)
 930 {
 931         pci_unregister_driver(&fnic_driver);
 932         destroy_workqueue(fnic_event_queue);
 933         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]);
 934         kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]);
 935         kmem_cache_destroy(fnic_io_req_cache);
 936         fc_release_transport(fnic_fc_transport);
 937 }
 938
 939 module_init(fnic_init_module);
 940 module_exit(fnic_cleanup_module);
 941