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 unsigned int fnic_trace_max_pages = 16; 73 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR); 74 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages " 75 "for fnic trace buffer"); 76 77 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH; 78 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR); 79 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN"); 80 81 static struct libfc_function_template fnic_transport_template = { 82 .frame_send = fnic_send, 83 .lport_set_port_id = fnic_set_port_id, 84 .fcp_abort_io = fnic_empty_scsi_cleanup, 85 .fcp_cleanup = fnic_empty_scsi_cleanup, 86 .exch_mgr_reset = fnic_exch_mgr_reset 87 }; 88 89 static int fnic_slave_alloc(struct scsi_device *sdev) 90 { 91 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 92 93 sdev->tagged_supported = 1; 94 95 if (!rport || fc_remote_port_chkready(rport)) 96 return -ENXIO; 97 98 scsi_activate_tcq(sdev, fnic_max_qdepth); 99 return 0; 100 } 101 102 static struct scsi_host_template fnic_host_template = { 103 .module = THIS_MODULE, 104 .name = DRV_NAME, 105 .queuecommand = fnic_queuecommand, 106 .eh_abort_handler = fnic_abort_cmd, 107 .eh_device_reset_handler = fnic_device_reset, 108 .eh_host_reset_handler = fnic_host_reset, 109 .slave_alloc = fnic_slave_alloc, 110 .change_queue_depth = fc_change_queue_depth, 111 .change_queue_type = fc_change_queue_type, 112 .this_id = -1, 113 .cmd_per_lun = 3, 114 .can_queue = FNIC_MAX_IO_REQ, 115 .use_clustering = ENABLE_CLUSTERING, 116 .sg_tablesize = FNIC_MAX_SG_DESC_CNT, 117 .max_sectors = 0xffff, 118 .shost_attrs = fnic_attrs, 119 }; 120 121 static void 122 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 123 { 124 if (timeout) 125 rport->dev_loss_tmo = timeout; 126 else 127 rport->dev_loss_tmo = 1; 128 } 129 130 static void fnic_get_host_speed(struct Scsi_Host *shost); 131 static struct scsi_transport_template *fnic_fc_transport; 132 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *); 133 static void fnic_reset_host_stats(struct Scsi_Host *); 134 135 static struct fc_function_template fnic_fc_functions = { 136 137 .show_host_node_name = 1, 138 .show_host_port_name = 1, 139 .show_host_supported_classes = 1, 140 .show_host_supported_fc4s = 1, 141 .show_host_active_fc4s = 1, 142 .show_host_maxframe_size = 1, 143 .show_host_port_id = 1, 144 .show_host_supported_speeds = 1, 145 .get_host_speed = fnic_get_host_speed, 146 .show_host_speed = 1, 147 .show_host_port_type = 1, 148 .get_host_port_state = fc_get_host_port_state, 149 .show_host_port_state = 1, 150 .show_host_symbolic_name = 1, 151 .show_rport_maxframe_size = 1, 152 .show_rport_supported_classes = 1, 153 .show_host_fabric_name = 1, 154 .show_starget_node_name = 1, 155 .show_starget_port_name = 1, 156 .show_starget_port_id = 1, 157 .show_rport_dev_loss_tmo = 1, 158 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, 159 .issue_fc_host_lip = fnic_reset, 160 .get_fc_host_stats = fnic_get_stats, 161 .reset_fc_host_stats = fnic_reset_host_stats, 162 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 163 .terminate_rport_io = fnic_terminate_rport_io, 164 .bsg_request = fc_lport_bsg_request, 165 }; 166 167 static void fnic_get_host_speed(struct Scsi_Host *shost) 168 { 169 struct fc_lport *lp = shost_priv(shost); 170 struct fnic *fnic = lport_priv(lp); 171 u32 port_speed = vnic_dev_port_speed(fnic->vdev); 172 173 /* Add in other values as they get defined in fw */ 174 switch (port_speed) { 175 case 10000: 176 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 177 break; 178 default: 179 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 180 break; 181 } 182 } 183 184 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host) 185 { 186 int ret; 187 struct fc_lport *lp = shost_priv(host); 188 struct fnic *fnic = lport_priv(lp); 189 struct fc_host_statistics *stats = &lp->host_stats; 190 struct vnic_stats *vs; 191 unsigned long flags; 192 193 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT)) 194 return stats; 195 fnic->stats_time = jiffies; 196 197 spin_lock_irqsave(&fnic->fnic_lock, flags); 198 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats); 199 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 200 201 if (ret) { 202 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 203 "fnic: Get vnic stats failed" 204 " 0x%x", ret); 205 return stats; 206 } 207 vs = fnic->stats; 208 stats->tx_frames = vs->tx.tx_unicast_frames_ok; 209 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4; 210 stats->rx_frames = vs->rx.rx_unicast_frames_ok; 211 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4; 212 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors; 213 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop; 214 stats->invalid_crc_count = vs->rx.rx_crc_errors; 215 stats->seconds_since_last_reset = 216 (jiffies - fnic->stats_reset_time) / HZ; 217 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000); 218 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000); 219 220 return stats; 221 } 222 223 /* 224 * fnic_dump_fchost_stats 225 * note : dumps fc_statistics into system logs 226 */ 227 void fnic_dump_fchost_stats(struct Scsi_Host *host, 228 struct fc_host_statistics *stats) 229 { 230 FNIC_MAIN_NOTE(KERN_NOTICE, host, 231 "fnic: seconds since last reset = %llu\n", 232 stats->seconds_since_last_reset); 233 FNIC_MAIN_NOTE(KERN_NOTICE, host, 234 "fnic: tx frames = %llu\n", 235 stats->tx_frames); 236 FNIC_MAIN_NOTE(KERN_NOTICE, host, 237 "fnic: tx words = %llu\n", 238 stats->tx_words); 239 FNIC_MAIN_NOTE(KERN_NOTICE, host, 240 "fnic: rx frames = %llu\n", 241 stats->rx_frames); 242 FNIC_MAIN_NOTE(KERN_NOTICE, host, 243 "fnic: rx words = %llu\n", 244 stats->rx_words); 245 FNIC_MAIN_NOTE(KERN_NOTICE, host, 246 "fnic: lip count = %llu\n", 247 stats->lip_count); 248 FNIC_MAIN_NOTE(KERN_NOTICE, host, 249 "fnic: nos count = %llu\n", 250 stats->nos_count); 251 FNIC_MAIN_NOTE(KERN_NOTICE, host, 252 "fnic: error frames = %llu\n", 253 stats->error_frames); 254 FNIC_MAIN_NOTE(KERN_NOTICE, host, 255 "fnic: dumped frames = %llu\n", 256 stats->dumped_frames); 257 FNIC_MAIN_NOTE(KERN_NOTICE, host, 258 "fnic: link failure count = %llu\n", 259 stats->link_failure_count); 260 FNIC_MAIN_NOTE(KERN_NOTICE, host, 261 "fnic: loss of sync count = %llu\n", 262 stats->loss_of_sync_count); 263 FNIC_MAIN_NOTE(KERN_NOTICE, host, 264 "fnic: loss of signal count = %llu\n", 265 stats->loss_of_signal_count); 266 FNIC_MAIN_NOTE(KERN_NOTICE, host, 267 "fnic: prim seq protocol err count = %llu\n", 268 stats->prim_seq_protocol_err_count); 269 FNIC_MAIN_NOTE(KERN_NOTICE, host, 270 "fnic: invalid tx word count= %llu\n", 271 stats->invalid_tx_word_count); 272 FNIC_MAIN_NOTE(KERN_NOTICE, host, 273 "fnic: invalid crc count = %llu\n", 274 stats->invalid_crc_count); 275 FNIC_MAIN_NOTE(KERN_NOTICE, host, 276 "fnic: fcp input requests = %llu\n", 277 stats->fcp_input_requests); 278 FNIC_MAIN_NOTE(KERN_NOTICE, host, 279 "fnic: fcp output requests = %llu\n", 280 stats->fcp_output_requests); 281 FNIC_MAIN_NOTE(KERN_NOTICE, host, 282 "fnic: fcp control requests = %llu\n", 283 stats->fcp_control_requests); 284 FNIC_MAIN_NOTE(KERN_NOTICE, host, 285 "fnic: fcp input megabytes = %llu\n", 286 stats->fcp_input_megabytes); 287 FNIC_MAIN_NOTE(KERN_NOTICE, host, 288 "fnic: fcp output megabytes = %llu\n", 289 stats->fcp_output_megabytes); 290 return; 291 } 292 293 /* 294 * fnic_reset_host_stats : clears host stats 295 * note : called when reset_statistics set under sysfs dir 296 */ 297 static void fnic_reset_host_stats(struct Scsi_Host *host) 298 { 299 int ret; 300 struct fc_lport *lp = shost_priv(host); 301 struct fnic *fnic = lport_priv(lp); 302 struct fc_host_statistics *stats; 303 unsigned long flags; 304 305 /* dump current stats, before clearing them */ 306 stats = fnic_get_stats(host); 307 fnic_dump_fchost_stats(host, stats); 308 309 spin_lock_irqsave(&fnic->fnic_lock, flags); 310 ret = vnic_dev_stats_clear(fnic->vdev); 311 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 312 313 if (ret) { 314 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 315 "fnic: Reset vnic stats failed" 316 " 0x%x", ret); 317 return; 318 } 319 fnic->stats_reset_time = jiffies; 320 memset(stats, 0, sizeof(*stats)); 321 322 return; 323 } 324 325 void fnic_log_q_error(struct fnic *fnic) 326 { 327 unsigned int i; 328 u32 error_status; 329 330 for (i = 0; i < fnic->raw_wq_count; i++) { 331 error_status = ioread32(&fnic->wq[i].ctrl->error_status); 332 if (error_status) 333 shost_printk(KERN_ERR, fnic->lport->host, 334 "WQ[%d] error_status" 335 " %d\n", i, error_status); 336 } 337 338 for (i = 0; i < fnic->rq_count; i++) { 339 error_status = ioread32(&fnic->rq[i].ctrl->error_status); 340 if (error_status) 341 shost_printk(KERN_ERR, fnic->lport->host, 342 "RQ[%d] error_status" 343 " %d\n", i, error_status); 344 } 345 346 for (i = 0; i < fnic->wq_copy_count; i++) { 347 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status); 348 if (error_status) 349 shost_printk(KERN_ERR, fnic->lport->host, 350 "CWQ[%d] error_status" 351 " %d\n", i, error_status); 352 } 353 } 354 355 void fnic_handle_link_event(struct fnic *fnic) 356 { 357 unsigned long flags; 358 359 spin_lock_irqsave(&fnic->fnic_lock, flags); 360 if (fnic->stop_rx_link_events) { 361 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 362 return; 363 } 364 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 365 366 queue_work(fnic_event_queue, &fnic->link_work); 367 368 } 369 370 static int fnic_notify_set(struct fnic *fnic) 371 { 372 int err; 373 374 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 375 case VNIC_DEV_INTR_MODE_INTX: 376 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY); 377 break; 378 case VNIC_DEV_INTR_MODE_MSI: 379 err = vnic_dev_notify_set(fnic->vdev, -1); 380 break; 381 case VNIC_DEV_INTR_MODE_MSIX: 382 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY); 383 break; 384 default: 385 shost_printk(KERN_ERR, fnic->lport->host, 386 "Interrupt mode should be set up" 387 " before devcmd notify set %d\n", 388 vnic_dev_get_intr_mode(fnic->vdev)); 389 err = -1; 390 break; 391 } 392 393 return err; 394 } 395 396 static void fnic_notify_timer(unsigned long data) 397 { 398 struct fnic *fnic = (struct fnic *)data; 399 400 fnic_handle_link_event(fnic); 401 mod_timer(&fnic->notify_timer, 402 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD)); 403 } 404 405 static void fnic_fip_notify_timer(unsigned long data) 406 { 407 struct fnic *fnic = (struct fnic *)data; 408 409 fnic_handle_fip_timer(fnic); 410 } 411 412 static void fnic_notify_timer_start(struct fnic *fnic) 413 { 414 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 415 case VNIC_DEV_INTR_MODE_MSI: 416 /* 417 * Schedule first timeout immediately. The driver is 418 * initiatialized and ready to look for link up notification 419 */ 420 mod_timer(&fnic->notify_timer, jiffies); 421 break; 422 default: 423 /* Using intr for notification for INTx/MSI-X */ 424 break; 425 }; 426 } 427 428 static int fnic_dev_wait(struct vnic_dev *vdev, 429 int (*start)(struct vnic_dev *, int), 430 int (*finished)(struct vnic_dev *, int *), 431 int arg) 432 { 433 unsigned long time; 434 int done; 435 int err; 436 437 err = start(vdev, arg); 438 if (err) 439 return err; 440 441 /* Wait for func to complete...2 seconds max */ 442 time = jiffies + (HZ * 2); 443 do { 444 err = finished(vdev, &done); 445 if (err) 446 return err; 447 if (done) 448 return 0; 449 schedule_timeout_uninterruptible(HZ / 10); 450 } while (time_after(time, jiffies)); 451 452 return -ETIMEDOUT; 453 } 454 455 static int fnic_cleanup(struct fnic *fnic) 456 { 457 unsigned int i; 458 int err; 459 460 vnic_dev_disable(fnic->vdev); 461 for (i = 0; i < fnic->intr_count; i++) 462 vnic_intr_mask(&fnic->intr[i]); 463 464 for (i = 0; i < fnic->rq_count; i++) { 465 err = vnic_rq_disable(&fnic->rq[i]); 466 if (err) 467 return err; 468 } 469 for (i = 0; i < fnic->raw_wq_count; i++) { 470 err = vnic_wq_disable(&fnic->wq[i]); 471 if (err) 472 return err; 473 } 474 for (i = 0; i < fnic->wq_copy_count; i++) { 475 err = vnic_wq_copy_disable(&fnic->wq_copy[i]); 476 if (err) 477 return err; 478 } 479 480 /* Clean up completed IOs and FCS frames */ 481 fnic_wq_copy_cmpl_handler(fnic, -1); 482 fnic_wq_cmpl_handler(fnic, -1); 483 fnic_rq_cmpl_handler(fnic, -1); 484 485 /* Clean up the IOs and FCS frames that have not completed */ 486 for (i = 0; i < fnic->raw_wq_count; i++) 487 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf); 488 for (i = 0; i < fnic->rq_count; i++) 489 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 490 for (i = 0; i < fnic->wq_copy_count; i++) 491 vnic_wq_copy_clean(&fnic->wq_copy[i], 492 fnic_wq_copy_cleanup_handler); 493 494 for (i = 0; i < fnic->cq_count; i++) 495 vnic_cq_clean(&fnic->cq[i]); 496 for (i = 0; i < fnic->intr_count; i++) 497 vnic_intr_clean(&fnic->intr[i]); 498 499 mempool_destroy(fnic->io_req_pool); 500 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++) 501 mempool_destroy(fnic->io_sgl_pool[i]); 502 503 return 0; 504 } 505 506 static void fnic_iounmap(struct fnic *fnic) 507 { 508 if (fnic->bar0.vaddr) 509 iounmap(fnic->bar0.vaddr); 510 } 511 512 /** 513 * fnic_get_mac() - get assigned data MAC address for FIP code. 514 * @lport: local port. 515 */ 516 static u8 *fnic_get_mac(struct fc_lport *lport) 517 { 518 struct fnic *fnic = lport_priv(lport); 519 520 return fnic->data_src_addr; 521 } 522 523 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id) 524 { 525 u16 old_vlan; 526 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 527 } 528 529 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 530 { 531 struct Scsi_Host *host; 532 struct fc_lport *lp; 533 struct fnic *fnic; 534 mempool_t *pool; 535 int err; 536 int i; 537 unsigned long flags; 538 539 /* 540 * Allocate SCSI Host and set up association between host, 541 * local port, and fnic 542 */ 543 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 544 if (!lp) { 545 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 546 err = -ENOMEM; 547 goto err_out; 548 } 549 host = lp->host; 550 fnic = lport_priv(lp); 551 fnic->lport = lp; 552 fnic->ctlr.lp = lp; 553 554 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 555 host->host_no); 556 557 host->transportt = fnic_fc_transport; 558 559 err = fnic_stats_debugfs_init(fnic); 560 if (err) { 561 shost_printk(KERN_ERR, fnic->lport->host, 562 "Failed to initialize debugfs for stats\n"); 563 fnic_stats_debugfs_remove(fnic); 564 } 565 566 /* Setup PCI resources */ 567 pci_set_drvdata(pdev, fnic); 568 569 fnic->pdev = pdev; 570 571 err = pci_enable_device(pdev); 572 if (err) { 573 shost_printk(KERN_ERR, fnic->lport->host, 574 "Cannot enable PCI device, aborting.\n"); 575 goto err_out_free_hba; 576 } 577 578 err = pci_request_regions(pdev, DRV_NAME); 579 if (err) { 580 shost_printk(KERN_ERR, fnic->lport->host, 581 "Cannot enable PCI resources, aborting\n"); 582 goto err_out_disable_device; 583 } 584 585 pci_set_master(pdev); 586 587 /* Query PCI controller on system for DMA addressing 588 * limitation for the device. Try 64-bit first, and 589 * fail to 32-bit. 590 */ 591 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 592 if (err) { 593 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 594 if (err) { 595 shost_printk(KERN_ERR, fnic->lport->host, 596 "No usable DMA configuration " 597 "aborting\n"); 598 goto err_out_release_regions; 599 } 600 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 601 if (err) { 602 shost_printk(KERN_ERR, fnic->lport->host, 603 "Unable to obtain 32-bit DMA " 604 "for consistent allocations, aborting.\n"); 605 goto err_out_release_regions; 606 } 607 } else { 608 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 609 if (err) { 610 shost_printk(KERN_ERR, fnic->lport->host, 611 "Unable to obtain 64-bit DMA " 612 "for consistent allocations, aborting.\n"); 613 goto err_out_release_regions; 614 } 615 } 616 617 /* Map vNIC resources from BAR0 */ 618 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 619 shost_printk(KERN_ERR, fnic->lport->host, 620 "BAR0 not memory-map'able, aborting.\n"); 621 err = -ENODEV; 622 goto err_out_release_regions; 623 } 624 625 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 626 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 627 fnic->bar0.len = pci_resource_len(pdev, 0); 628 629 if (!fnic->bar0.vaddr) { 630 shost_printk(KERN_ERR, fnic->lport->host, 631 "Cannot memory-map BAR0 res hdr, " 632 "aborting.\n"); 633 err = -ENODEV; 634 goto err_out_release_regions; 635 } 636 637 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 638 if (!fnic->vdev) { 639 shost_printk(KERN_ERR, fnic->lport->host, 640 "vNIC registration failed, " 641 "aborting.\n"); 642 err = -ENODEV; 643 goto err_out_iounmap; 644 } 645 646 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 647 vnic_dev_open_done, 0); 648 if (err) { 649 shost_printk(KERN_ERR, fnic->lport->host, 650 "vNIC dev open failed, aborting.\n"); 651 goto err_out_vnic_unregister; 652 } 653 654 err = vnic_dev_init(fnic->vdev, 0); 655 if (err) { 656 shost_printk(KERN_ERR, fnic->lport->host, 657 "vNIC dev init failed, aborting.\n"); 658 goto err_out_dev_close; 659 } 660 661 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 662 if (err) { 663 shost_printk(KERN_ERR, fnic->lport->host, 664 "vNIC get MAC addr failed \n"); 665 goto err_out_dev_close; 666 } 667 /* set data_src for point-to-point mode and to keep it non-zero */ 668 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 669 670 /* Get vNIC configuration */ 671 err = fnic_get_vnic_config(fnic); 672 if (err) { 673 shost_printk(KERN_ERR, fnic->lport->host, 674 "Get vNIC configuration failed, " 675 "aborting.\n"); 676 goto err_out_dev_close; 677 } 678 679 /* Configure Maximum Outstanding IO reqs*/ 680 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 681 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 682 max_t(u32, FNIC_MIN_IO_REQ, 683 fnic->config.io_throttle_count)); 684 } 685 fnic->fnic_max_tag_id = host->can_queue; 686 687 err = scsi_init_shared_tag_map(host, fnic->fnic_max_tag_id); 688 if (err) { 689 shost_printk(KERN_ERR, fnic->lport->host, 690 "Unable to alloc shared tag map\n"); 691 goto err_out_dev_close; 692 } 693 694 host->max_lun = fnic->config.luns_per_tgt; 695 host->max_id = FNIC_MAX_FCP_TARGET; 696 host->max_cmd_len = FCOE_MAX_CMD_LEN; 697 698 fnic_get_res_counts(fnic); 699 700 err = fnic_set_intr_mode(fnic); 701 if (err) { 702 shost_printk(KERN_ERR, fnic->lport->host, 703 "Failed to set intr mode, " 704 "aborting.\n"); 705 goto err_out_dev_close; 706 } 707 708 err = fnic_alloc_vnic_resources(fnic); 709 if (err) { 710 shost_printk(KERN_ERR, fnic->lport->host, 711 "Failed to alloc vNIC resources, " 712 "aborting.\n"); 713 goto err_out_clear_intr; 714 } 715 716 717 /* initialize all fnic locks */ 718 spin_lock_init(&fnic->fnic_lock); 719 720 for (i = 0; i < FNIC_WQ_MAX; i++) 721 spin_lock_init(&fnic->wq_lock[i]); 722 723 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 724 spin_lock_init(&fnic->wq_copy_lock[i]); 725 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 726 fnic->fw_ack_recd[i] = 0; 727 fnic->fw_ack_index[i] = -1; 728 } 729 730 for (i = 0; i < FNIC_IO_LOCKS; i++) 731 spin_lock_init(&fnic->io_req_lock[i]); 732 733 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 734 if (!fnic->io_req_pool) 735 goto err_out_free_resources; 736 737 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 738 if (!pool) 739 goto err_out_free_ioreq_pool; 740 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 741 742 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 743 if (!pool) 744 goto err_out_free_dflt_pool; 745 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 746 747 /* setup vlan config, hw inserts vlan header */ 748 fnic->vlan_hw_insert = 1; 749 fnic->vlan_id = 0; 750 751 /* Initialize the FIP fcoe_ctrl struct */ 752 fnic->ctlr.send = fnic_eth_send; 753 fnic->ctlr.update_mac = fnic_update_mac; 754 fnic->ctlr.get_src_addr = fnic_get_mac; 755 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 756 shost_printk(KERN_INFO, fnic->lport->host, 757 "firmware supports FIP\n"); 758 /* enable directed and multicast */ 759 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 760 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 761 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 762 fnic->set_vlan = fnic_set_vlan; 763 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 764 setup_timer(&fnic->fip_timer, fnic_fip_notify_timer, 765 (unsigned long)fnic); 766 spin_lock_init(&fnic->vlans_lock); 767 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 768 INIT_WORK(&fnic->event_work, fnic_handle_event); 769 skb_queue_head_init(&fnic->fip_frame_queue); 770 INIT_LIST_HEAD(&fnic->evlist); 771 INIT_LIST_HEAD(&fnic->vlans); 772 } else { 773 shost_printk(KERN_INFO, fnic->lport->host, 774 "firmware uses non-FIP mode\n"); 775 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 776 } 777 fnic->state = FNIC_IN_FC_MODE; 778 779 atomic_set(&fnic->in_flight, 0); 780 fnic->state_flags = FNIC_FLAGS_NONE; 781 782 /* Enable hardware stripping of vlan header on ingress */ 783 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 784 785 /* Setup notification buffer area */ 786 err = fnic_notify_set(fnic); 787 if (err) { 788 shost_printk(KERN_ERR, fnic->lport->host, 789 "Failed to alloc notify buffer, aborting.\n"); 790 goto err_out_free_max_pool; 791 } 792 793 /* Setup notify timer when using MSI interrupts */ 794 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 795 setup_timer(&fnic->notify_timer, 796 fnic_notify_timer, (unsigned long)fnic); 797 798 /* allocate RQ buffers and post them to RQ*/ 799 for (i = 0; i < fnic->rq_count; i++) { 800 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 801 if (err) { 802 shost_printk(KERN_ERR, fnic->lport->host, 803 "fnic_alloc_rq_frame can't alloc " 804 "frame\n"); 805 goto err_out_free_rq_buf; 806 } 807 } 808 809 /* 810 * Initialization done with PCI system, hardware, firmware. 811 * Add host to SCSI 812 */ 813 err = scsi_add_host(lp->host, &pdev->dev); 814 if (err) { 815 shost_printk(KERN_ERR, fnic->lport->host, 816 "fnic: scsi_add_host failed...exiting\n"); 817 goto err_out_free_rq_buf; 818 } 819 820 /* Start local port initiatialization */ 821 822 lp->link_up = 0; 823 824 lp->max_retry_count = fnic->config.flogi_retries; 825 lp->max_rport_retry_count = fnic->config.plogi_retries; 826 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 827 FCP_SPPF_CONF_COMPL); 828 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 829 lp->service_params |= FCP_SPPF_RETRY; 830 831 lp->boot_time = jiffies; 832 lp->e_d_tov = fnic->config.ed_tov; 833 lp->r_a_tov = fnic->config.ra_tov; 834 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 835 fc_set_wwnn(lp, fnic->config.node_wwn); 836 fc_set_wwpn(lp, fnic->config.port_wwn); 837 838 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 839 840 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 841 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 842 err = -ENOMEM; 843 goto err_out_remove_scsi_host; 844 } 845 846 fc_lport_init_stats(lp); 847 fnic->stats_reset_time = jiffies; 848 849 fc_lport_config(lp); 850 851 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 852 sizeof(struct fc_frame_header))) { 853 err = -EINVAL; 854 goto err_out_free_exch_mgr; 855 } 856 fc_host_maxframe_size(lp->host) = lp->mfs; 857 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 858 859 sprintf(fc_host_symbolic_name(lp->host), 860 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 861 862 spin_lock_irqsave(&fnic_list_lock, flags); 863 list_add_tail(&fnic->list, &fnic_list); 864 spin_unlock_irqrestore(&fnic_list_lock, flags); 865 866 INIT_WORK(&fnic->link_work, fnic_handle_link); 867 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 868 skb_queue_head_init(&fnic->frame_queue); 869 skb_queue_head_init(&fnic->tx_queue); 870 871 /* Enable all queues */ 872 for (i = 0; i < fnic->raw_wq_count; i++) 873 vnic_wq_enable(&fnic->wq[i]); 874 for (i = 0; i < fnic->rq_count; i++) 875 vnic_rq_enable(&fnic->rq[i]); 876 for (i = 0; i < fnic->wq_copy_count; i++) 877 vnic_wq_copy_enable(&fnic->wq_copy[i]); 878 879 fc_fabric_login(lp); 880 881 vnic_dev_enable(fnic->vdev); 882 883 err = fnic_request_intr(fnic); 884 if (err) { 885 shost_printk(KERN_ERR, fnic->lport->host, 886 "Unable to request irq.\n"); 887 goto err_out_free_exch_mgr; 888 } 889 890 for (i = 0; i < fnic->intr_count; i++) 891 vnic_intr_unmask(&fnic->intr[i]); 892 893 fnic_notify_timer_start(fnic); 894 895 return 0; 896 897 err_out_free_exch_mgr: 898 fc_exch_mgr_free(lp); 899 err_out_remove_scsi_host: 900 fc_remove_host(lp->host); 901 scsi_remove_host(lp->host); 902 err_out_free_rq_buf: 903 for (i = 0; i < fnic->rq_count; i++) 904 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 905 vnic_dev_notify_unset(fnic->vdev); 906 err_out_free_max_pool: 907 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 908 err_out_free_dflt_pool: 909 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 910 err_out_free_ioreq_pool: 911 mempool_destroy(fnic->io_req_pool); 912 err_out_free_resources: 913 fnic_free_vnic_resources(fnic); 914 err_out_clear_intr: 915 fnic_clear_intr_mode(fnic); 916 err_out_dev_close: 917 vnic_dev_close(fnic->vdev); 918 err_out_vnic_unregister: 919 vnic_dev_unregister(fnic->vdev); 920 err_out_iounmap: 921 fnic_iounmap(fnic); 922 err_out_release_regions: 923 pci_release_regions(pdev); 924 err_out_disable_device: 925 pci_disable_device(pdev); 926 err_out_free_hba: 927 fnic_stats_debugfs_remove(fnic); 928 scsi_host_put(lp->host); 929 err_out: 930 return err; 931 } 932 933 static void fnic_remove(struct pci_dev *pdev) 934 { 935 struct fnic *fnic = pci_get_drvdata(pdev); 936 struct fc_lport *lp = fnic->lport; 937 unsigned long flags; 938 939 /* 940 * Mark state so that the workqueue thread stops forwarding 941 * received frames and link events to the local port. ISR and 942 * other threads that can queue work items will also stop 943 * creating work items on the fnic workqueue 944 */ 945 spin_lock_irqsave(&fnic->fnic_lock, flags); 946 fnic->stop_rx_link_events = 1; 947 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 948 949 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 950 del_timer_sync(&fnic->notify_timer); 951 952 /* 953 * Flush the fnic event queue. After this call, there should 954 * be no event queued for this fnic device in the workqueue 955 */ 956 flush_workqueue(fnic_event_queue); 957 skb_queue_purge(&fnic->frame_queue); 958 skb_queue_purge(&fnic->tx_queue); 959 960 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 961 del_timer_sync(&fnic->fip_timer); 962 skb_queue_purge(&fnic->fip_frame_queue); 963 fnic_fcoe_reset_vlans(fnic); 964 fnic_fcoe_evlist_free(fnic); 965 } 966 967 /* 968 * Log off the fabric. This stops all remote ports, dns port, 969 * logs off the fabric. This flushes all rport, disc, lport work 970 * before returning 971 */ 972 fc_fabric_logoff(fnic->lport); 973 974 spin_lock_irqsave(&fnic->fnic_lock, flags); 975 fnic->in_remove = 1; 976 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 977 978 fcoe_ctlr_destroy(&fnic->ctlr); 979 fc_lport_destroy(lp); 980 fnic_stats_debugfs_remove(fnic); 981 982 /* 983 * This stops the fnic device, masks all interrupts. Completed 984 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 985 * cleaned up 986 */ 987 fnic_cleanup(fnic); 988 989 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 990 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 991 992 spin_lock_irqsave(&fnic_list_lock, flags); 993 list_del(&fnic->list); 994 spin_unlock_irqrestore(&fnic_list_lock, flags); 995 996 fc_remove_host(fnic->lport->host); 997 scsi_remove_host(fnic->lport->host); 998 fc_exch_mgr_free(fnic->lport); 999 vnic_dev_notify_unset(fnic->vdev); 1000 fnic_free_intr(fnic); 1001 fnic_free_vnic_resources(fnic); 1002 fnic_clear_intr_mode(fnic); 1003 vnic_dev_close(fnic->vdev); 1004 vnic_dev_unregister(fnic->vdev); 1005 fnic_iounmap(fnic); 1006 pci_release_regions(pdev); 1007 pci_disable_device(pdev); 1008 scsi_host_put(lp->host); 1009 } 1010 1011 static struct pci_driver fnic_driver = { 1012 .name = DRV_NAME, 1013 .id_table = fnic_id_table, 1014 .probe = fnic_probe, 1015 .remove = fnic_remove, 1016 }; 1017 1018 static int __init fnic_init_module(void) 1019 { 1020 size_t len; 1021 int err = 0; 1022 1023 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1024 1025 /* Create debugfs entries for fnic */ 1026 err = fnic_debugfs_init(); 1027 if (err < 0) { 1028 printk(KERN_ERR PFX "Failed to create fnic directory " 1029 "for tracing and stats logging\n"); 1030 fnic_debugfs_terminate(); 1031 } 1032 1033 /* Allocate memory for trace buffer */ 1034 err = fnic_trace_buf_init(); 1035 if (err < 0) { 1036 printk(KERN_ERR PFX "Trace buffer initialization Failed " 1037 "Fnic Tracing utility is disabled\n"); 1038 fnic_trace_free(); 1039 } 1040 1041 /* Create a cache for allocation of default size sgls */ 1042 len = sizeof(struct fnic_dflt_sgl_list); 1043 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1044 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1045 SLAB_HWCACHE_ALIGN, 1046 NULL); 1047 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1048 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1049 err = -ENOMEM; 1050 goto err_create_fnic_sgl_slab_dflt; 1051 } 1052 1053 /* Create a cache for allocation of max size sgls*/ 1054 len = sizeof(struct fnic_sgl_list); 1055 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1056 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1057 SLAB_HWCACHE_ALIGN, 1058 NULL); 1059 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1060 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1061 err = -ENOMEM; 1062 goto err_create_fnic_sgl_slab_max; 1063 } 1064 1065 /* Create a cache of io_req structs for use via mempool */ 1066 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1067 sizeof(struct fnic_io_req), 1068 0, SLAB_HWCACHE_ALIGN, NULL); 1069 if (!fnic_io_req_cache) { 1070 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1071 err = -ENOMEM; 1072 goto err_create_fnic_ioreq_slab; 1073 } 1074 1075 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1076 if (!fnic_event_queue) { 1077 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1078 err = -ENOMEM; 1079 goto err_create_fnic_workq; 1080 } 1081 1082 spin_lock_init(&fnic_list_lock); 1083 INIT_LIST_HEAD(&fnic_list); 1084 1085 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1086 if (!fnic_fip_queue) { 1087 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1088 err = -ENOMEM; 1089 goto err_create_fip_workq; 1090 } 1091 1092 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1093 if (!fnic_fc_transport) { 1094 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1095 err = -ENOMEM; 1096 goto err_fc_transport; 1097 } 1098 1099 /* register the driver with PCI system */ 1100 err = pci_register_driver(&fnic_driver); 1101 if (err < 0) { 1102 printk(KERN_ERR PFX "pci register error\n"); 1103 goto err_pci_register; 1104 } 1105 return err; 1106 1107 err_pci_register: 1108 fc_release_transport(fnic_fc_transport); 1109 err_fc_transport: 1110 destroy_workqueue(fnic_fip_queue); 1111 err_create_fip_workq: 1112 destroy_workqueue(fnic_event_queue); 1113 err_create_fnic_workq: 1114 kmem_cache_destroy(fnic_io_req_cache); 1115 err_create_fnic_ioreq_slab: 1116 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1117 err_create_fnic_sgl_slab_max: 1118 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1119 err_create_fnic_sgl_slab_dflt: 1120 fnic_trace_free(); 1121 fnic_debugfs_terminate(); 1122 return err; 1123 } 1124 1125 static void __exit fnic_cleanup_module(void) 1126 { 1127 pci_unregister_driver(&fnic_driver); 1128 destroy_workqueue(fnic_event_queue); 1129 if (fnic_fip_queue) { 1130 flush_workqueue(fnic_fip_queue); 1131 destroy_workqueue(fnic_fip_queue); 1132 } 1133 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1134 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1135 kmem_cache_destroy(fnic_io_req_cache); 1136 fc_release_transport(fnic_fc_transport); 1137 fnic_trace_free(); 1138 fnic_debugfs_terminate(); 1139 } 1140 1141 module_init(fnic_init_module); 1142 module_exit(fnic_cleanup_module); 1143 1144