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 unsigned int fnic_fc_trace_max_pages = 64; 78 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR); 79 MODULE_PARM_DESC(fnic_fc_trace_max_pages, 80 "Total allocated memory pages for fc trace buffer"); 81 82 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH; 83 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR); 84 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN"); 85 86 static struct libfc_function_template fnic_transport_template = { 87 .frame_send = fnic_send, 88 .lport_set_port_id = fnic_set_port_id, 89 .fcp_abort_io = fnic_empty_scsi_cleanup, 90 .fcp_cleanup = fnic_empty_scsi_cleanup, 91 .exch_mgr_reset = fnic_exch_mgr_reset 92 }; 93 94 static int fnic_slave_alloc(struct scsi_device *sdev) 95 { 96 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 97 98 sdev->tagged_supported = 1; 99 100 if (!rport || fc_remote_port_chkready(rport)) 101 return -ENXIO; 102 103 scsi_activate_tcq(sdev, fnic_max_qdepth); 104 return 0; 105 } 106 107 static struct scsi_host_template fnic_host_template = { 108 .module = THIS_MODULE, 109 .name = DRV_NAME, 110 .queuecommand = fnic_queuecommand, 111 .eh_abort_handler = fnic_abort_cmd, 112 .eh_device_reset_handler = fnic_device_reset, 113 .eh_host_reset_handler = fnic_host_reset, 114 .slave_alloc = fnic_slave_alloc, 115 .change_queue_depth = fc_change_queue_depth, 116 .change_queue_type = fc_change_queue_type, 117 .this_id = -1, 118 .cmd_per_lun = 3, 119 .can_queue = FNIC_DFLT_IO_REQ, 120 .use_clustering = ENABLE_CLUSTERING, 121 .sg_tablesize = FNIC_MAX_SG_DESC_CNT, 122 .max_sectors = 0xffff, 123 .shost_attrs = fnic_attrs, 124 }; 125 126 static void 127 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 128 { 129 if (timeout) 130 rport->dev_loss_tmo = timeout; 131 else 132 rport->dev_loss_tmo = 1; 133 } 134 135 static void fnic_get_host_speed(struct Scsi_Host *shost); 136 static struct scsi_transport_template *fnic_fc_transport; 137 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *); 138 static void fnic_reset_host_stats(struct Scsi_Host *); 139 140 static struct fc_function_template fnic_fc_functions = { 141 142 .show_host_node_name = 1, 143 .show_host_port_name = 1, 144 .show_host_supported_classes = 1, 145 .show_host_supported_fc4s = 1, 146 .show_host_active_fc4s = 1, 147 .show_host_maxframe_size = 1, 148 .show_host_port_id = 1, 149 .show_host_supported_speeds = 1, 150 .get_host_speed = fnic_get_host_speed, 151 .show_host_speed = 1, 152 .show_host_port_type = 1, 153 .get_host_port_state = fc_get_host_port_state, 154 .show_host_port_state = 1, 155 .show_host_symbolic_name = 1, 156 .show_rport_maxframe_size = 1, 157 .show_rport_supported_classes = 1, 158 .show_host_fabric_name = 1, 159 .show_starget_node_name = 1, 160 .show_starget_port_name = 1, 161 .show_starget_port_id = 1, 162 .show_rport_dev_loss_tmo = 1, 163 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, 164 .issue_fc_host_lip = fnic_reset, 165 .get_fc_host_stats = fnic_get_stats, 166 .reset_fc_host_stats = fnic_reset_host_stats, 167 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 168 .terminate_rport_io = fnic_terminate_rport_io, 169 .bsg_request = fc_lport_bsg_request, 170 }; 171 172 static void fnic_get_host_speed(struct Scsi_Host *shost) 173 { 174 struct fc_lport *lp = shost_priv(shost); 175 struct fnic *fnic = lport_priv(lp); 176 u32 port_speed = vnic_dev_port_speed(fnic->vdev); 177 178 /* Add in other values as they get defined in fw */ 179 switch (port_speed) { 180 case 10000: 181 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 182 break; 183 default: 184 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 185 break; 186 } 187 } 188 189 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host) 190 { 191 int ret; 192 struct fc_lport *lp = shost_priv(host); 193 struct fnic *fnic = lport_priv(lp); 194 struct fc_host_statistics *stats = &lp->host_stats; 195 struct vnic_stats *vs; 196 unsigned long flags; 197 198 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT)) 199 return stats; 200 fnic->stats_time = jiffies; 201 202 spin_lock_irqsave(&fnic->fnic_lock, flags); 203 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats); 204 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 205 206 if (ret) { 207 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 208 "fnic: Get vnic stats failed" 209 " 0x%x", ret); 210 return stats; 211 } 212 vs = fnic->stats; 213 stats->tx_frames = vs->tx.tx_unicast_frames_ok; 214 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4; 215 stats->rx_frames = vs->rx.rx_unicast_frames_ok; 216 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4; 217 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors; 218 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop; 219 stats->invalid_crc_count = vs->rx.rx_crc_errors; 220 stats->seconds_since_last_reset = 221 (jiffies - fnic->stats_reset_time) / HZ; 222 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000); 223 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000); 224 225 return stats; 226 } 227 228 /* 229 * fnic_dump_fchost_stats 230 * note : dumps fc_statistics into system logs 231 */ 232 void fnic_dump_fchost_stats(struct Scsi_Host *host, 233 struct fc_host_statistics *stats) 234 { 235 FNIC_MAIN_NOTE(KERN_NOTICE, host, 236 "fnic: seconds since last reset = %llu\n", 237 stats->seconds_since_last_reset); 238 FNIC_MAIN_NOTE(KERN_NOTICE, host, 239 "fnic: tx frames = %llu\n", 240 stats->tx_frames); 241 FNIC_MAIN_NOTE(KERN_NOTICE, host, 242 "fnic: tx words = %llu\n", 243 stats->tx_words); 244 FNIC_MAIN_NOTE(KERN_NOTICE, host, 245 "fnic: rx frames = %llu\n", 246 stats->rx_frames); 247 FNIC_MAIN_NOTE(KERN_NOTICE, host, 248 "fnic: rx words = %llu\n", 249 stats->rx_words); 250 FNIC_MAIN_NOTE(KERN_NOTICE, host, 251 "fnic: lip count = %llu\n", 252 stats->lip_count); 253 FNIC_MAIN_NOTE(KERN_NOTICE, host, 254 "fnic: nos count = %llu\n", 255 stats->nos_count); 256 FNIC_MAIN_NOTE(KERN_NOTICE, host, 257 "fnic: error frames = %llu\n", 258 stats->error_frames); 259 FNIC_MAIN_NOTE(KERN_NOTICE, host, 260 "fnic: dumped frames = %llu\n", 261 stats->dumped_frames); 262 FNIC_MAIN_NOTE(KERN_NOTICE, host, 263 "fnic: link failure count = %llu\n", 264 stats->link_failure_count); 265 FNIC_MAIN_NOTE(KERN_NOTICE, host, 266 "fnic: loss of sync count = %llu\n", 267 stats->loss_of_sync_count); 268 FNIC_MAIN_NOTE(KERN_NOTICE, host, 269 "fnic: loss of signal count = %llu\n", 270 stats->loss_of_signal_count); 271 FNIC_MAIN_NOTE(KERN_NOTICE, host, 272 "fnic: prim seq protocol err count = %llu\n", 273 stats->prim_seq_protocol_err_count); 274 FNIC_MAIN_NOTE(KERN_NOTICE, host, 275 "fnic: invalid tx word count= %llu\n", 276 stats->invalid_tx_word_count); 277 FNIC_MAIN_NOTE(KERN_NOTICE, host, 278 "fnic: invalid crc count = %llu\n", 279 stats->invalid_crc_count); 280 FNIC_MAIN_NOTE(KERN_NOTICE, host, 281 "fnic: fcp input requests = %llu\n", 282 stats->fcp_input_requests); 283 FNIC_MAIN_NOTE(KERN_NOTICE, host, 284 "fnic: fcp output requests = %llu\n", 285 stats->fcp_output_requests); 286 FNIC_MAIN_NOTE(KERN_NOTICE, host, 287 "fnic: fcp control requests = %llu\n", 288 stats->fcp_control_requests); 289 FNIC_MAIN_NOTE(KERN_NOTICE, host, 290 "fnic: fcp input megabytes = %llu\n", 291 stats->fcp_input_megabytes); 292 FNIC_MAIN_NOTE(KERN_NOTICE, host, 293 "fnic: fcp output megabytes = %llu\n", 294 stats->fcp_output_megabytes); 295 return; 296 } 297 298 /* 299 * fnic_reset_host_stats : clears host stats 300 * note : called when reset_statistics set under sysfs dir 301 */ 302 static void fnic_reset_host_stats(struct Scsi_Host *host) 303 { 304 int ret; 305 struct fc_lport *lp = shost_priv(host); 306 struct fnic *fnic = lport_priv(lp); 307 struct fc_host_statistics *stats; 308 unsigned long flags; 309 310 /* dump current stats, before clearing them */ 311 stats = fnic_get_stats(host); 312 fnic_dump_fchost_stats(host, stats); 313 314 spin_lock_irqsave(&fnic->fnic_lock, flags); 315 ret = vnic_dev_stats_clear(fnic->vdev); 316 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 317 318 if (ret) { 319 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 320 "fnic: Reset vnic stats failed" 321 " 0x%x", ret); 322 return; 323 } 324 fnic->stats_reset_time = jiffies; 325 memset(stats, 0, sizeof(*stats)); 326 327 return; 328 } 329 330 void fnic_log_q_error(struct fnic *fnic) 331 { 332 unsigned int i; 333 u32 error_status; 334 335 for (i = 0; i < fnic->raw_wq_count; i++) { 336 error_status = ioread32(&fnic->wq[i].ctrl->error_status); 337 if (error_status) 338 shost_printk(KERN_ERR, fnic->lport->host, 339 "WQ[%d] error_status" 340 " %d\n", i, error_status); 341 } 342 343 for (i = 0; i < fnic->rq_count; i++) { 344 error_status = ioread32(&fnic->rq[i].ctrl->error_status); 345 if (error_status) 346 shost_printk(KERN_ERR, fnic->lport->host, 347 "RQ[%d] error_status" 348 " %d\n", i, error_status); 349 } 350 351 for (i = 0; i < fnic->wq_copy_count; i++) { 352 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status); 353 if (error_status) 354 shost_printk(KERN_ERR, fnic->lport->host, 355 "CWQ[%d] error_status" 356 " %d\n", i, error_status); 357 } 358 } 359 360 void fnic_handle_link_event(struct fnic *fnic) 361 { 362 unsigned long flags; 363 364 spin_lock_irqsave(&fnic->fnic_lock, flags); 365 if (fnic->stop_rx_link_events) { 366 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 367 return; 368 } 369 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 370 371 queue_work(fnic_event_queue, &fnic->link_work); 372 373 } 374 375 static int fnic_notify_set(struct fnic *fnic) 376 { 377 int err; 378 379 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 380 case VNIC_DEV_INTR_MODE_INTX: 381 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY); 382 break; 383 case VNIC_DEV_INTR_MODE_MSI: 384 err = vnic_dev_notify_set(fnic->vdev, -1); 385 break; 386 case VNIC_DEV_INTR_MODE_MSIX: 387 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY); 388 break; 389 default: 390 shost_printk(KERN_ERR, fnic->lport->host, 391 "Interrupt mode should be set up" 392 " before devcmd notify set %d\n", 393 vnic_dev_get_intr_mode(fnic->vdev)); 394 err = -1; 395 break; 396 } 397 398 return err; 399 } 400 401 static void fnic_notify_timer(unsigned long data) 402 { 403 struct fnic *fnic = (struct fnic *)data; 404 405 fnic_handle_link_event(fnic); 406 mod_timer(&fnic->notify_timer, 407 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD)); 408 } 409 410 static void fnic_fip_notify_timer(unsigned long data) 411 { 412 struct fnic *fnic = (struct fnic *)data; 413 414 fnic_handle_fip_timer(fnic); 415 } 416 417 static void fnic_notify_timer_start(struct fnic *fnic) 418 { 419 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 420 case VNIC_DEV_INTR_MODE_MSI: 421 /* 422 * Schedule first timeout immediately. The driver is 423 * initiatialized and ready to look for link up notification 424 */ 425 mod_timer(&fnic->notify_timer, jiffies); 426 break; 427 default: 428 /* Using intr for notification for INTx/MSI-X */ 429 break; 430 }; 431 } 432 433 static int fnic_dev_wait(struct vnic_dev *vdev, 434 int (*start)(struct vnic_dev *, int), 435 int (*finished)(struct vnic_dev *, int *), 436 int arg) 437 { 438 unsigned long time; 439 int done; 440 int err; 441 442 err = start(vdev, arg); 443 if (err) 444 return err; 445 446 /* Wait for func to complete...2 seconds max */ 447 time = jiffies + (HZ * 2); 448 do { 449 err = finished(vdev, &done); 450 if (err) 451 return err; 452 if (done) 453 return 0; 454 schedule_timeout_uninterruptible(HZ / 10); 455 } while (time_after(time, jiffies)); 456 457 return -ETIMEDOUT; 458 } 459 460 static int fnic_cleanup(struct fnic *fnic) 461 { 462 unsigned int i; 463 int err; 464 465 vnic_dev_disable(fnic->vdev); 466 for (i = 0; i < fnic->intr_count; i++) 467 vnic_intr_mask(&fnic->intr[i]); 468 469 for (i = 0; i < fnic->rq_count; i++) { 470 err = vnic_rq_disable(&fnic->rq[i]); 471 if (err) 472 return err; 473 } 474 for (i = 0; i < fnic->raw_wq_count; i++) { 475 err = vnic_wq_disable(&fnic->wq[i]); 476 if (err) 477 return err; 478 } 479 for (i = 0; i < fnic->wq_copy_count; i++) { 480 err = vnic_wq_copy_disable(&fnic->wq_copy[i]); 481 if (err) 482 return err; 483 } 484 485 /* Clean up completed IOs and FCS frames */ 486 fnic_wq_copy_cmpl_handler(fnic, -1); 487 fnic_wq_cmpl_handler(fnic, -1); 488 fnic_rq_cmpl_handler(fnic, -1); 489 490 /* Clean up the IOs and FCS frames that have not completed */ 491 for (i = 0; i < fnic->raw_wq_count; i++) 492 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf); 493 for (i = 0; i < fnic->rq_count; i++) 494 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 495 for (i = 0; i < fnic->wq_copy_count; i++) 496 vnic_wq_copy_clean(&fnic->wq_copy[i], 497 fnic_wq_copy_cleanup_handler); 498 499 for (i = 0; i < fnic->cq_count; i++) 500 vnic_cq_clean(&fnic->cq[i]); 501 for (i = 0; i < fnic->intr_count; i++) 502 vnic_intr_clean(&fnic->intr[i]); 503 504 mempool_destroy(fnic->io_req_pool); 505 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++) 506 mempool_destroy(fnic->io_sgl_pool[i]); 507 508 return 0; 509 } 510 511 static void fnic_iounmap(struct fnic *fnic) 512 { 513 if (fnic->bar0.vaddr) 514 iounmap(fnic->bar0.vaddr); 515 } 516 517 /** 518 * fnic_get_mac() - get assigned data MAC address for FIP code. 519 * @lport: local port. 520 */ 521 static u8 *fnic_get_mac(struct fc_lport *lport) 522 { 523 struct fnic *fnic = lport_priv(lport); 524 525 return fnic->data_src_addr; 526 } 527 528 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id) 529 { 530 u16 old_vlan; 531 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 532 } 533 534 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 535 { 536 struct Scsi_Host *host; 537 struct fc_lport *lp; 538 struct fnic *fnic; 539 mempool_t *pool; 540 int err; 541 int i; 542 unsigned long flags; 543 544 /* 545 * Allocate SCSI Host and set up association between host, 546 * local port, and fnic 547 */ 548 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 549 if (!lp) { 550 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 551 err = -ENOMEM; 552 goto err_out; 553 } 554 host = lp->host; 555 fnic = lport_priv(lp); 556 fnic->lport = lp; 557 fnic->ctlr.lp = lp; 558 559 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 560 host->host_no); 561 562 host->transportt = fnic_fc_transport; 563 564 err = fnic_stats_debugfs_init(fnic); 565 if (err) { 566 shost_printk(KERN_ERR, fnic->lport->host, 567 "Failed to initialize debugfs for stats\n"); 568 fnic_stats_debugfs_remove(fnic); 569 } 570 571 /* Setup PCI resources */ 572 pci_set_drvdata(pdev, fnic); 573 574 fnic->pdev = pdev; 575 576 err = pci_enable_device(pdev); 577 if (err) { 578 shost_printk(KERN_ERR, fnic->lport->host, 579 "Cannot enable PCI device, aborting.\n"); 580 goto err_out_free_hba; 581 } 582 583 err = pci_request_regions(pdev, DRV_NAME); 584 if (err) { 585 shost_printk(KERN_ERR, fnic->lport->host, 586 "Cannot enable PCI resources, aborting\n"); 587 goto err_out_disable_device; 588 } 589 590 pci_set_master(pdev); 591 592 /* Query PCI controller on system for DMA addressing 593 * limitation for the device. Try 64-bit first, and 594 * fail to 32-bit. 595 */ 596 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 597 if (err) { 598 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 599 if (err) { 600 shost_printk(KERN_ERR, fnic->lport->host, 601 "No usable DMA configuration " 602 "aborting\n"); 603 goto err_out_release_regions; 604 } 605 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 606 if (err) { 607 shost_printk(KERN_ERR, fnic->lport->host, 608 "Unable to obtain 32-bit DMA " 609 "for consistent allocations, aborting.\n"); 610 goto err_out_release_regions; 611 } 612 } else { 613 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 614 if (err) { 615 shost_printk(KERN_ERR, fnic->lport->host, 616 "Unable to obtain 64-bit DMA " 617 "for consistent allocations, aborting.\n"); 618 goto err_out_release_regions; 619 } 620 } 621 622 /* Map vNIC resources from BAR0 */ 623 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 624 shost_printk(KERN_ERR, fnic->lport->host, 625 "BAR0 not memory-map'able, aborting.\n"); 626 err = -ENODEV; 627 goto err_out_release_regions; 628 } 629 630 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 631 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 632 fnic->bar0.len = pci_resource_len(pdev, 0); 633 634 if (!fnic->bar0.vaddr) { 635 shost_printk(KERN_ERR, fnic->lport->host, 636 "Cannot memory-map BAR0 res hdr, " 637 "aborting.\n"); 638 err = -ENODEV; 639 goto err_out_release_regions; 640 } 641 642 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 643 if (!fnic->vdev) { 644 shost_printk(KERN_ERR, fnic->lport->host, 645 "vNIC registration failed, " 646 "aborting.\n"); 647 err = -ENODEV; 648 goto err_out_iounmap; 649 } 650 651 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 652 vnic_dev_open_done, 0); 653 if (err) { 654 shost_printk(KERN_ERR, fnic->lport->host, 655 "vNIC dev open failed, aborting.\n"); 656 goto err_out_vnic_unregister; 657 } 658 659 err = vnic_dev_init(fnic->vdev, 0); 660 if (err) { 661 shost_printk(KERN_ERR, fnic->lport->host, 662 "vNIC dev init failed, aborting.\n"); 663 goto err_out_dev_close; 664 } 665 666 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 667 if (err) { 668 shost_printk(KERN_ERR, fnic->lport->host, 669 "vNIC get MAC addr failed \n"); 670 goto err_out_dev_close; 671 } 672 /* set data_src for point-to-point mode and to keep it non-zero */ 673 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 674 675 /* Get vNIC configuration */ 676 err = fnic_get_vnic_config(fnic); 677 if (err) { 678 shost_printk(KERN_ERR, fnic->lport->host, 679 "Get vNIC configuration failed, " 680 "aborting.\n"); 681 goto err_out_dev_close; 682 } 683 684 /* Configure Maximum Outstanding IO reqs*/ 685 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 686 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 687 max_t(u32, FNIC_MIN_IO_REQ, 688 fnic->config.io_throttle_count)); 689 } 690 fnic->fnic_max_tag_id = host->can_queue; 691 692 err = scsi_init_shared_tag_map(host, fnic->fnic_max_tag_id); 693 if (err) { 694 shost_printk(KERN_ERR, fnic->lport->host, 695 "Unable to alloc shared tag map\n"); 696 goto err_out_dev_close; 697 } 698 699 host->max_lun = fnic->config.luns_per_tgt; 700 host->max_id = FNIC_MAX_FCP_TARGET; 701 host->max_cmd_len = FCOE_MAX_CMD_LEN; 702 703 fnic_get_res_counts(fnic); 704 705 err = fnic_set_intr_mode(fnic); 706 if (err) { 707 shost_printk(KERN_ERR, fnic->lport->host, 708 "Failed to set intr mode, " 709 "aborting.\n"); 710 goto err_out_dev_close; 711 } 712 713 err = fnic_alloc_vnic_resources(fnic); 714 if (err) { 715 shost_printk(KERN_ERR, fnic->lport->host, 716 "Failed to alloc vNIC resources, " 717 "aborting.\n"); 718 goto err_out_clear_intr; 719 } 720 721 722 /* initialize all fnic locks */ 723 spin_lock_init(&fnic->fnic_lock); 724 725 for (i = 0; i < FNIC_WQ_MAX; i++) 726 spin_lock_init(&fnic->wq_lock[i]); 727 728 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 729 spin_lock_init(&fnic->wq_copy_lock[i]); 730 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 731 fnic->fw_ack_recd[i] = 0; 732 fnic->fw_ack_index[i] = -1; 733 } 734 735 for (i = 0; i < FNIC_IO_LOCKS; i++) 736 spin_lock_init(&fnic->io_req_lock[i]); 737 738 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 739 if (!fnic->io_req_pool) 740 goto err_out_free_resources; 741 742 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 743 if (!pool) 744 goto err_out_free_ioreq_pool; 745 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 746 747 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 748 if (!pool) 749 goto err_out_free_dflt_pool; 750 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 751 752 /* setup vlan config, hw inserts vlan header */ 753 fnic->vlan_hw_insert = 1; 754 fnic->vlan_id = 0; 755 756 /* Initialize the FIP fcoe_ctrl struct */ 757 fnic->ctlr.send = fnic_eth_send; 758 fnic->ctlr.update_mac = fnic_update_mac; 759 fnic->ctlr.get_src_addr = fnic_get_mac; 760 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 761 shost_printk(KERN_INFO, fnic->lport->host, 762 "firmware supports FIP\n"); 763 /* enable directed and multicast */ 764 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 765 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 766 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 767 fnic->set_vlan = fnic_set_vlan; 768 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 769 setup_timer(&fnic->fip_timer, fnic_fip_notify_timer, 770 (unsigned long)fnic); 771 spin_lock_init(&fnic->vlans_lock); 772 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 773 INIT_WORK(&fnic->event_work, fnic_handle_event); 774 skb_queue_head_init(&fnic->fip_frame_queue); 775 INIT_LIST_HEAD(&fnic->evlist); 776 INIT_LIST_HEAD(&fnic->vlans); 777 } else { 778 shost_printk(KERN_INFO, fnic->lport->host, 779 "firmware uses non-FIP mode\n"); 780 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 781 fnic->ctlr.state = FIP_ST_NON_FIP; 782 } 783 fnic->state = FNIC_IN_FC_MODE; 784 785 atomic_set(&fnic->in_flight, 0); 786 fnic->state_flags = FNIC_FLAGS_NONE; 787 788 /* Enable hardware stripping of vlan header on ingress */ 789 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 790 791 /* Setup notification buffer area */ 792 err = fnic_notify_set(fnic); 793 if (err) { 794 shost_printk(KERN_ERR, fnic->lport->host, 795 "Failed to alloc notify buffer, aborting.\n"); 796 goto err_out_free_max_pool; 797 } 798 799 /* Setup notify timer when using MSI interrupts */ 800 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 801 setup_timer(&fnic->notify_timer, 802 fnic_notify_timer, (unsigned long)fnic); 803 804 /* allocate RQ buffers and post them to RQ*/ 805 for (i = 0; i < fnic->rq_count; i++) { 806 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 807 if (err) { 808 shost_printk(KERN_ERR, fnic->lport->host, 809 "fnic_alloc_rq_frame can't alloc " 810 "frame\n"); 811 goto err_out_free_rq_buf; 812 } 813 } 814 815 /* 816 * Initialization done with PCI system, hardware, firmware. 817 * Add host to SCSI 818 */ 819 err = scsi_add_host(lp->host, &pdev->dev); 820 if (err) { 821 shost_printk(KERN_ERR, fnic->lport->host, 822 "fnic: scsi_add_host failed...exiting\n"); 823 goto err_out_free_rq_buf; 824 } 825 826 /* Start local port initiatialization */ 827 828 lp->link_up = 0; 829 830 lp->max_retry_count = fnic->config.flogi_retries; 831 lp->max_rport_retry_count = fnic->config.plogi_retries; 832 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 833 FCP_SPPF_CONF_COMPL); 834 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 835 lp->service_params |= FCP_SPPF_RETRY; 836 837 lp->boot_time = jiffies; 838 lp->e_d_tov = fnic->config.ed_tov; 839 lp->r_a_tov = fnic->config.ra_tov; 840 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 841 fc_set_wwnn(lp, fnic->config.node_wwn); 842 fc_set_wwpn(lp, fnic->config.port_wwn); 843 844 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 845 846 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 847 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 848 err = -ENOMEM; 849 goto err_out_remove_scsi_host; 850 } 851 852 fc_lport_init_stats(lp); 853 fnic->stats_reset_time = jiffies; 854 855 fc_lport_config(lp); 856 857 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 858 sizeof(struct fc_frame_header))) { 859 err = -EINVAL; 860 goto err_out_free_exch_mgr; 861 } 862 fc_host_maxframe_size(lp->host) = lp->mfs; 863 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 864 865 sprintf(fc_host_symbolic_name(lp->host), 866 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 867 868 spin_lock_irqsave(&fnic_list_lock, flags); 869 list_add_tail(&fnic->list, &fnic_list); 870 spin_unlock_irqrestore(&fnic_list_lock, flags); 871 872 INIT_WORK(&fnic->link_work, fnic_handle_link); 873 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 874 skb_queue_head_init(&fnic->frame_queue); 875 skb_queue_head_init(&fnic->tx_queue); 876 877 /* Enable all queues */ 878 for (i = 0; i < fnic->raw_wq_count; i++) 879 vnic_wq_enable(&fnic->wq[i]); 880 for (i = 0; i < fnic->rq_count; i++) 881 vnic_rq_enable(&fnic->rq[i]); 882 for (i = 0; i < fnic->wq_copy_count; i++) 883 vnic_wq_copy_enable(&fnic->wq_copy[i]); 884 885 fc_fabric_login(lp); 886 887 vnic_dev_enable(fnic->vdev); 888 889 err = fnic_request_intr(fnic); 890 if (err) { 891 shost_printk(KERN_ERR, fnic->lport->host, 892 "Unable to request irq.\n"); 893 goto err_out_free_exch_mgr; 894 } 895 896 for (i = 0; i < fnic->intr_count; i++) 897 vnic_intr_unmask(&fnic->intr[i]); 898 899 fnic_notify_timer_start(fnic); 900 901 return 0; 902 903 err_out_free_exch_mgr: 904 fc_exch_mgr_free(lp); 905 err_out_remove_scsi_host: 906 fc_remove_host(lp->host); 907 scsi_remove_host(lp->host); 908 err_out_free_rq_buf: 909 for (i = 0; i < fnic->rq_count; i++) 910 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 911 vnic_dev_notify_unset(fnic->vdev); 912 err_out_free_max_pool: 913 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 914 err_out_free_dflt_pool: 915 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 916 err_out_free_ioreq_pool: 917 mempool_destroy(fnic->io_req_pool); 918 err_out_free_resources: 919 fnic_free_vnic_resources(fnic); 920 err_out_clear_intr: 921 fnic_clear_intr_mode(fnic); 922 err_out_dev_close: 923 vnic_dev_close(fnic->vdev); 924 err_out_vnic_unregister: 925 vnic_dev_unregister(fnic->vdev); 926 err_out_iounmap: 927 fnic_iounmap(fnic); 928 err_out_release_regions: 929 pci_release_regions(pdev); 930 err_out_disable_device: 931 pci_disable_device(pdev); 932 err_out_free_hba: 933 fnic_stats_debugfs_remove(fnic); 934 scsi_host_put(lp->host); 935 err_out: 936 return err; 937 } 938 939 static void fnic_remove(struct pci_dev *pdev) 940 { 941 struct fnic *fnic = pci_get_drvdata(pdev); 942 struct fc_lport *lp = fnic->lport; 943 unsigned long flags; 944 945 /* 946 * Mark state so that the workqueue thread stops forwarding 947 * received frames and link events to the local port. ISR and 948 * other threads that can queue work items will also stop 949 * creating work items on the fnic workqueue 950 */ 951 spin_lock_irqsave(&fnic->fnic_lock, flags); 952 fnic->stop_rx_link_events = 1; 953 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 954 955 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 956 del_timer_sync(&fnic->notify_timer); 957 958 /* 959 * Flush the fnic event queue. After this call, there should 960 * be no event queued for this fnic device in the workqueue 961 */ 962 flush_workqueue(fnic_event_queue); 963 skb_queue_purge(&fnic->frame_queue); 964 skb_queue_purge(&fnic->tx_queue); 965 966 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 967 del_timer_sync(&fnic->fip_timer); 968 skb_queue_purge(&fnic->fip_frame_queue); 969 fnic_fcoe_reset_vlans(fnic); 970 fnic_fcoe_evlist_free(fnic); 971 } 972 973 /* 974 * Log off the fabric. This stops all remote ports, dns port, 975 * logs off the fabric. This flushes all rport, disc, lport work 976 * before returning 977 */ 978 fc_fabric_logoff(fnic->lport); 979 980 spin_lock_irqsave(&fnic->fnic_lock, flags); 981 fnic->in_remove = 1; 982 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 983 984 fcoe_ctlr_destroy(&fnic->ctlr); 985 fc_lport_destroy(lp); 986 fnic_stats_debugfs_remove(fnic); 987 988 /* 989 * This stops the fnic device, masks all interrupts. Completed 990 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 991 * cleaned up 992 */ 993 fnic_cleanup(fnic); 994 995 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 996 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 997 998 spin_lock_irqsave(&fnic_list_lock, flags); 999 list_del(&fnic->list); 1000 spin_unlock_irqrestore(&fnic_list_lock, flags); 1001 1002 fc_remove_host(fnic->lport->host); 1003 scsi_remove_host(fnic->lport->host); 1004 fc_exch_mgr_free(fnic->lport); 1005 vnic_dev_notify_unset(fnic->vdev); 1006 fnic_free_intr(fnic); 1007 fnic_free_vnic_resources(fnic); 1008 fnic_clear_intr_mode(fnic); 1009 vnic_dev_close(fnic->vdev); 1010 vnic_dev_unregister(fnic->vdev); 1011 fnic_iounmap(fnic); 1012 pci_release_regions(pdev); 1013 pci_disable_device(pdev); 1014 scsi_host_put(lp->host); 1015 } 1016 1017 static struct pci_driver fnic_driver = { 1018 .name = DRV_NAME, 1019 .id_table = fnic_id_table, 1020 .probe = fnic_probe, 1021 .remove = fnic_remove, 1022 }; 1023 1024 static int __init fnic_init_module(void) 1025 { 1026 size_t len; 1027 int err = 0; 1028 1029 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1030 1031 /* Create debugfs entries for fnic */ 1032 err = fnic_debugfs_init(); 1033 if (err < 0) { 1034 printk(KERN_ERR PFX "Failed to create fnic directory " 1035 "for tracing and stats logging\n"); 1036 fnic_debugfs_terminate(); 1037 } 1038 1039 /* Allocate memory for trace buffer */ 1040 err = fnic_trace_buf_init(); 1041 if (err < 0) { 1042 printk(KERN_ERR PFX 1043 "Trace buffer initialization Failed. " 1044 "Fnic Tracing utility is disabled\n"); 1045 fnic_trace_free(); 1046 } 1047 1048 /* Allocate memory for fc trace buffer */ 1049 err = fnic_fc_trace_init(); 1050 if (err < 0) { 1051 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1052 "FC frame tracing utility is disabled\n"); 1053 fnic_fc_trace_free(); 1054 } 1055 1056 /* Create a cache for allocation of default size sgls */ 1057 len = sizeof(struct fnic_dflt_sgl_list); 1058 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1059 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1060 SLAB_HWCACHE_ALIGN, 1061 NULL); 1062 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1063 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1064 err = -ENOMEM; 1065 goto err_create_fnic_sgl_slab_dflt; 1066 } 1067 1068 /* Create a cache for allocation of max size sgls*/ 1069 len = sizeof(struct fnic_sgl_list); 1070 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1071 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1072 SLAB_HWCACHE_ALIGN, 1073 NULL); 1074 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1075 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1076 err = -ENOMEM; 1077 goto err_create_fnic_sgl_slab_max; 1078 } 1079 1080 /* Create a cache of io_req structs for use via mempool */ 1081 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1082 sizeof(struct fnic_io_req), 1083 0, SLAB_HWCACHE_ALIGN, NULL); 1084 if (!fnic_io_req_cache) { 1085 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1086 err = -ENOMEM; 1087 goto err_create_fnic_ioreq_slab; 1088 } 1089 1090 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1091 if (!fnic_event_queue) { 1092 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1093 err = -ENOMEM; 1094 goto err_create_fnic_workq; 1095 } 1096 1097 spin_lock_init(&fnic_list_lock); 1098 INIT_LIST_HEAD(&fnic_list); 1099 1100 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1101 if (!fnic_fip_queue) { 1102 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1103 err = -ENOMEM; 1104 goto err_create_fip_workq; 1105 } 1106 1107 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1108 if (!fnic_fc_transport) { 1109 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1110 err = -ENOMEM; 1111 goto err_fc_transport; 1112 } 1113 1114 /* register the driver with PCI system */ 1115 err = pci_register_driver(&fnic_driver); 1116 if (err < 0) { 1117 printk(KERN_ERR PFX "pci register error\n"); 1118 goto err_pci_register; 1119 } 1120 return err; 1121 1122 err_pci_register: 1123 fc_release_transport(fnic_fc_transport); 1124 err_fc_transport: 1125 destroy_workqueue(fnic_fip_queue); 1126 err_create_fip_workq: 1127 destroy_workqueue(fnic_event_queue); 1128 err_create_fnic_workq: 1129 kmem_cache_destroy(fnic_io_req_cache); 1130 err_create_fnic_ioreq_slab: 1131 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1132 err_create_fnic_sgl_slab_max: 1133 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1134 err_create_fnic_sgl_slab_dflt: 1135 fnic_trace_free(); 1136 fnic_fc_trace_free(); 1137 fnic_debugfs_terminate(); 1138 return err; 1139 } 1140 1141 static void __exit fnic_cleanup_module(void) 1142 { 1143 pci_unregister_driver(&fnic_driver); 1144 destroy_workqueue(fnic_event_queue); 1145 if (fnic_fip_queue) { 1146 flush_workqueue(fnic_fip_queue); 1147 destroy_workqueue(fnic_fip_queue); 1148 } 1149 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1150 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1151 kmem_cache_destroy(fnic_io_req_cache); 1152 fc_release_transport(fnic_fc_transport); 1153 fnic_trace_free(); 1154 fnic_fc_trace_free(); 1155 fnic_debugfs_terminate(); 1156 } 1157 1158 module_init(fnic_init_module); 1159 module_exit(fnic_cleanup_module); 1160 1161