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 if (!rport || fc_remote_port_chkready(rport)) 99 return -ENXIO; 100 101 scsi_change_queue_depth(sdev, fnic_max_qdepth); 102 return 0; 103 } 104 105 static struct scsi_host_template fnic_host_template = { 106 .module = THIS_MODULE, 107 .name = DRV_NAME, 108 .queuecommand = fnic_queuecommand, 109 .eh_abort_handler = fnic_abort_cmd, 110 .eh_device_reset_handler = fnic_device_reset, 111 .eh_host_reset_handler = fnic_host_reset, 112 .slave_alloc = fnic_slave_alloc, 113 .change_queue_depth = scsi_change_queue_depth, 114 .this_id = -1, 115 .cmd_per_lun = 3, 116 .can_queue = FNIC_DFLT_IO_REQ, 117 .use_clustering = ENABLE_CLUSTERING, 118 .sg_tablesize = FNIC_MAX_SG_DESC_CNT, 119 .max_sectors = 0xffff, 120 .shost_attrs = fnic_attrs, 121 .track_queue_depth = 1, 122 }; 123 124 static void 125 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 126 { 127 if (timeout) 128 rport->dev_loss_tmo = timeout; 129 else 130 rport->dev_loss_tmo = 1; 131 } 132 133 static void fnic_get_host_speed(struct Scsi_Host *shost); 134 static struct scsi_transport_template *fnic_fc_transport; 135 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *); 136 static void fnic_reset_host_stats(struct Scsi_Host *); 137 138 static struct fc_function_template fnic_fc_functions = { 139 140 .show_host_node_name = 1, 141 .show_host_port_name = 1, 142 .show_host_supported_classes = 1, 143 .show_host_supported_fc4s = 1, 144 .show_host_active_fc4s = 1, 145 .show_host_maxframe_size = 1, 146 .show_host_port_id = 1, 147 .show_host_supported_speeds = 1, 148 .get_host_speed = fnic_get_host_speed, 149 .show_host_speed = 1, 150 .show_host_port_type = 1, 151 .get_host_port_state = fc_get_host_port_state, 152 .show_host_port_state = 1, 153 .show_host_symbolic_name = 1, 154 .show_rport_maxframe_size = 1, 155 .show_rport_supported_classes = 1, 156 .show_host_fabric_name = 1, 157 .show_starget_node_name = 1, 158 .show_starget_port_name = 1, 159 .show_starget_port_id = 1, 160 .show_rport_dev_loss_tmo = 1, 161 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, 162 .issue_fc_host_lip = fnic_reset, 163 .get_fc_host_stats = fnic_get_stats, 164 .reset_fc_host_stats = fnic_reset_host_stats, 165 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 166 .terminate_rport_io = fnic_terminate_rport_io, 167 .bsg_request = fc_lport_bsg_request, 168 }; 169 170 static void fnic_get_host_speed(struct Scsi_Host *shost) 171 { 172 struct fc_lport *lp = shost_priv(shost); 173 struct fnic *fnic = lport_priv(lp); 174 u32 port_speed = vnic_dev_port_speed(fnic->vdev); 175 176 /* Add in other values as they get defined in fw */ 177 switch (port_speed) { 178 case 10000: 179 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 180 break; 181 default: 182 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 183 break; 184 } 185 } 186 187 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host) 188 { 189 int ret; 190 struct fc_lport *lp = shost_priv(host); 191 struct fnic *fnic = lport_priv(lp); 192 struct fc_host_statistics *stats = &lp->host_stats; 193 struct vnic_stats *vs; 194 unsigned long flags; 195 196 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT)) 197 return stats; 198 fnic->stats_time = jiffies; 199 200 spin_lock_irqsave(&fnic->fnic_lock, flags); 201 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats); 202 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 203 204 if (ret) { 205 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 206 "fnic: Get vnic stats failed" 207 " 0x%x", ret); 208 return stats; 209 } 210 vs = fnic->stats; 211 stats->tx_frames = vs->tx.tx_unicast_frames_ok; 212 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4; 213 stats->rx_frames = vs->rx.rx_unicast_frames_ok; 214 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4; 215 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors; 216 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop; 217 stats->invalid_crc_count = vs->rx.rx_crc_errors; 218 stats->seconds_since_last_reset = 219 (jiffies - fnic->stats_reset_time) / HZ; 220 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000); 221 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000); 222 223 return stats; 224 } 225 226 /* 227 * fnic_dump_fchost_stats 228 * note : dumps fc_statistics into system logs 229 */ 230 void fnic_dump_fchost_stats(struct Scsi_Host *host, 231 struct fc_host_statistics *stats) 232 { 233 FNIC_MAIN_NOTE(KERN_NOTICE, host, 234 "fnic: seconds since last reset = %llu\n", 235 stats->seconds_since_last_reset); 236 FNIC_MAIN_NOTE(KERN_NOTICE, host, 237 "fnic: tx frames = %llu\n", 238 stats->tx_frames); 239 FNIC_MAIN_NOTE(KERN_NOTICE, host, 240 "fnic: tx words = %llu\n", 241 stats->tx_words); 242 FNIC_MAIN_NOTE(KERN_NOTICE, host, 243 "fnic: rx frames = %llu\n", 244 stats->rx_frames); 245 FNIC_MAIN_NOTE(KERN_NOTICE, host, 246 "fnic: rx words = %llu\n", 247 stats->rx_words); 248 FNIC_MAIN_NOTE(KERN_NOTICE, host, 249 "fnic: lip count = %llu\n", 250 stats->lip_count); 251 FNIC_MAIN_NOTE(KERN_NOTICE, host, 252 "fnic: nos count = %llu\n", 253 stats->nos_count); 254 FNIC_MAIN_NOTE(KERN_NOTICE, host, 255 "fnic: error frames = %llu\n", 256 stats->error_frames); 257 FNIC_MAIN_NOTE(KERN_NOTICE, host, 258 "fnic: dumped frames = %llu\n", 259 stats->dumped_frames); 260 FNIC_MAIN_NOTE(KERN_NOTICE, host, 261 "fnic: link failure count = %llu\n", 262 stats->link_failure_count); 263 FNIC_MAIN_NOTE(KERN_NOTICE, host, 264 "fnic: loss of sync count = %llu\n", 265 stats->loss_of_sync_count); 266 FNIC_MAIN_NOTE(KERN_NOTICE, host, 267 "fnic: loss of signal count = %llu\n", 268 stats->loss_of_signal_count); 269 FNIC_MAIN_NOTE(KERN_NOTICE, host, 270 "fnic: prim seq protocol err count = %llu\n", 271 stats->prim_seq_protocol_err_count); 272 FNIC_MAIN_NOTE(KERN_NOTICE, host, 273 "fnic: invalid tx word count= %llu\n", 274 stats->invalid_tx_word_count); 275 FNIC_MAIN_NOTE(KERN_NOTICE, host, 276 "fnic: invalid crc count = %llu\n", 277 stats->invalid_crc_count); 278 FNIC_MAIN_NOTE(KERN_NOTICE, host, 279 "fnic: fcp input requests = %llu\n", 280 stats->fcp_input_requests); 281 FNIC_MAIN_NOTE(KERN_NOTICE, host, 282 "fnic: fcp output requests = %llu\n", 283 stats->fcp_output_requests); 284 FNIC_MAIN_NOTE(KERN_NOTICE, host, 285 "fnic: fcp control requests = %llu\n", 286 stats->fcp_control_requests); 287 FNIC_MAIN_NOTE(KERN_NOTICE, host, 288 "fnic: fcp input megabytes = %llu\n", 289 stats->fcp_input_megabytes); 290 FNIC_MAIN_NOTE(KERN_NOTICE, host, 291 "fnic: fcp output megabytes = %llu\n", 292 stats->fcp_output_megabytes); 293 return; 294 } 295 296 /* 297 * fnic_reset_host_stats : clears host stats 298 * note : called when reset_statistics set under sysfs dir 299 */ 300 static void fnic_reset_host_stats(struct Scsi_Host *host) 301 { 302 int ret; 303 struct fc_lport *lp = shost_priv(host); 304 struct fnic *fnic = lport_priv(lp); 305 struct fc_host_statistics *stats; 306 unsigned long flags; 307 308 /* dump current stats, before clearing them */ 309 stats = fnic_get_stats(host); 310 fnic_dump_fchost_stats(host, stats); 311 312 spin_lock_irqsave(&fnic->fnic_lock, flags); 313 ret = vnic_dev_stats_clear(fnic->vdev); 314 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 315 316 if (ret) { 317 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 318 "fnic: Reset vnic stats failed" 319 " 0x%x", ret); 320 return; 321 } 322 fnic->stats_reset_time = jiffies; 323 memset(stats, 0, sizeof(*stats)); 324 325 return; 326 } 327 328 void fnic_log_q_error(struct fnic *fnic) 329 { 330 unsigned int i; 331 u32 error_status; 332 333 for (i = 0; i < fnic->raw_wq_count; i++) { 334 error_status = ioread32(&fnic->wq[i].ctrl->error_status); 335 if (error_status) 336 shost_printk(KERN_ERR, fnic->lport->host, 337 "WQ[%d] error_status" 338 " %d\n", i, error_status); 339 } 340 341 for (i = 0; i < fnic->rq_count; i++) { 342 error_status = ioread32(&fnic->rq[i].ctrl->error_status); 343 if (error_status) 344 shost_printk(KERN_ERR, fnic->lport->host, 345 "RQ[%d] error_status" 346 " %d\n", i, error_status); 347 } 348 349 for (i = 0; i < fnic->wq_copy_count; i++) { 350 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status); 351 if (error_status) 352 shost_printk(KERN_ERR, fnic->lport->host, 353 "CWQ[%d] error_status" 354 " %d\n", i, error_status); 355 } 356 } 357 358 void fnic_handle_link_event(struct fnic *fnic) 359 { 360 unsigned long flags; 361 362 spin_lock_irqsave(&fnic->fnic_lock, flags); 363 if (fnic->stop_rx_link_events) { 364 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 365 return; 366 } 367 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 368 369 queue_work(fnic_event_queue, &fnic->link_work); 370 371 } 372 373 static int fnic_notify_set(struct fnic *fnic) 374 { 375 int err; 376 377 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 378 case VNIC_DEV_INTR_MODE_INTX: 379 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY); 380 break; 381 case VNIC_DEV_INTR_MODE_MSI: 382 err = vnic_dev_notify_set(fnic->vdev, -1); 383 break; 384 case VNIC_DEV_INTR_MODE_MSIX: 385 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY); 386 break; 387 default: 388 shost_printk(KERN_ERR, fnic->lport->host, 389 "Interrupt mode should be set up" 390 " before devcmd notify set %d\n", 391 vnic_dev_get_intr_mode(fnic->vdev)); 392 err = -1; 393 break; 394 } 395 396 return err; 397 } 398 399 static void fnic_notify_timer(unsigned long data) 400 { 401 struct fnic *fnic = (struct fnic *)data; 402 403 fnic_handle_link_event(fnic); 404 mod_timer(&fnic->notify_timer, 405 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD)); 406 } 407 408 static void fnic_fip_notify_timer(unsigned long data) 409 { 410 struct fnic *fnic = (struct fnic *)data; 411 412 fnic_handle_fip_timer(fnic); 413 } 414 415 static void fnic_notify_timer_start(struct fnic *fnic) 416 { 417 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 418 case VNIC_DEV_INTR_MODE_MSI: 419 /* 420 * Schedule first timeout immediately. The driver is 421 * initiatialized and ready to look for link up notification 422 */ 423 mod_timer(&fnic->notify_timer, jiffies); 424 break; 425 default: 426 /* Using intr for notification for INTx/MSI-X */ 427 break; 428 }; 429 } 430 431 static int fnic_dev_wait(struct vnic_dev *vdev, 432 int (*start)(struct vnic_dev *, int), 433 int (*finished)(struct vnic_dev *, int *), 434 int arg) 435 { 436 unsigned long time; 437 int done; 438 int err; 439 int count; 440 441 count = 0; 442 443 err = start(vdev, arg); 444 if (err) 445 return err; 446 447 /* Wait for func to complete. 448 * Sometime schedule_timeout_uninterruptible take long time 449 * to wake up so we do not retry as we are only waiting for 450 * 2 seconds in while loop. By adding count, we make sure 451 * we try atleast three times before returning -ETIMEDOUT 452 */ 453 time = jiffies + (HZ * 2); 454 do { 455 err = finished(vdev, &done); 456 count++; 457 if (err) 458 return err; 459 if (done) 460 return 0; 461 schedule_timeout_uninterruptible(HZ / 10); 462 } while (time_after(time, jiffies) || (count < 3)); 463 464 return -ETIMEDOUT; 465 } 466 467 static int fnic_cleanup(struct fnic *fnic) 468 { 469 unsigned int i; 470 int err; 471 472 vnic_dev_disable(fnic->vdev); 473 for (i = 0; i < fnic->intr_count; i++) 474 vnic_intr_mask(&fnic->intr[i]); 475 476 for (i = 0; i < fnic->rq_count; i++) { 477 err = vnic_rq_disable(&fnic->rq[i]); 478 if (err) 479 return err; 480 } 481 for (i = 0; i < fnic->raw_wq_count; i++) { 482 err = vnic_wq_disable(&fnic->wq[i]); 483 if (err) 484 return err; 485 } 486 for (i = 0; i < fnic->wq_copy_count; i++) { 487 err = vnic_wq_copy_disable(&fnic->wq_copy[i]); 488 if (err) 489 return err; 490 } 491 492 /* Clean up completed IOs and FCS frames */ 493 fnic_wq_copy_cmpl_handler(fnic, -1); 494 fnic_wq_cmpl_handler(fnic, -1); 495 fnic_rq_cmpl_handler(fnic, -1); 496 497 /* Clean up the IOs and FCS frames that have not completed */ 498 for (i = 0; i < fnic->raw_wq_count; i++) 499 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf); 500 for (i = 0; i < fnic->rq_count; i++) 501 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 502 for (i = 0; i < fnic->wq_copy_count; i++) 503 vnic_wq_copy_clean(&fnic->wq_copy[i], 504 fnic_wq_copy_cleanup_handler); 505 506 for (i = 0; i < fnic->cq_count; i++) 507 vnic_cq_clean(&fnic->cq[i]); 508 for (i = 0; i < fnic->intr_count; i++) 509 vnic_intr_clean(&fnic->intr[i]); 510 511 mempool_destroy(fnic->io_req_pool); 512 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++) 513 mempool_destroy(fnic->io_sgl_pool[i]); 514 515 return 0; 516 } 517 518 static void fnic_iounmap(struct fnic *fnic) 519 { 520 if (fnic->bar0.vaddr) 521 iounmap(fnic->bar0.vaddr); 522 } 523 524 /** 525 * fnic_get_mac() - get assigned data MAC address for FIP code. 526 * @lport: local port. 527 */ 528 static u8 *fnic_get_mac(struct fc_lport *lport) 529 { 530 struct fnic *fnic = lport_priv(lport); 531 532 return fnic->data_src_addr; 533 } 534 535 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id) 536 { 537 u16 old_vlan; 538 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 539 } 540 541 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 542 { 543 struct Scsi_Host *host; 544 struct fc_lport *lp; 545 struct fnic *fnic; 546 mempool_t *pool; 547 int err; 548 int i; 549 unsigned long flags; 550 551 /* 552 * Allocate SCSI Host and set up association between host, 553 * local port, and fnic 554 */ 555 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 556 if (!lp) { 557 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 558 err = -ENOMEM; 559 goto err_out; 560 } 561 host = lp->host; 562 fnic = lport_priv(lp); 563 fnic->lport = lp; 564 fnic->ctlr.lp = lp; 565 566 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 567 host->host_no); 568 569 host->transportt = fnic_fc_transport; 570 571 err = fnic_stats_debugfs_init(fnic); 572 if (err) { 573 shost_printk(KERN_ERR, fnic->lport->host, 574 "Failed to initialize debugfs for stats\n"); 575 fnic_stats_debugfs_remove(fnic); 576 } 577 578 /* Setup PCI resources */ 579 pci_set_drvdata(pdev, fnic); 580 581 fnic->pdev = pdev; 582 583 err = pci_enable_device(pdev); 584 if (err) { 585 shost_printk(KERN_ERR, fnic->lport->host, 586 "Cannot enable PCI device, aborting.\n"); 587 goto err_out_free_hba; 588 } 589 590 err = pci_request_regions(pdev, DRV_NAME); 591 if (err) { 592 shost_printk(KERN_ERR, fnic->lport->host, 593 "Cannot enable PCI resources, aborting\n"); 594 goto err_out_disable_device; 595 } 596 597 pci_set_master(pdev); 598 599 /* Query PCI controller on system for DMA addressing 600 * limitation for the device. Try 64-bit first, and 601 * fail to 32-bit. 602 */ 603 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 604 if (err) { 605 err = pci_set_dma_mask(pdev, DMA_BIT_MASK(32)); 606 if (err) { 607 shost_printk(KERN_ERR, fnic->lport->host, 608 "No usable DMA configuration " 609 "aborting\n"); 610 goto err_out_release_regions; 611 } 612 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 613 if (err) { 614 shost_printk(KERN_ERR, fnic->lport->host, 615 "Unable to obtain 32-bit DMA " 616 "for consistent allocations, aborting.\n"); 617 goto err_out_release_regions; 618 } 619 } else { 620 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 621 if (err) { 622 shost_printk(KERN_ERR, fnic->lport->host, 623 "Unable to obtain 64-bit DMA " 624 "for consistent allocations, aborting.\n"); 625 goto err_out_release_regions; 626 } 627 } 628 629 /* Map vNIC resources from BAR0 */ 630 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 631 shost_printk(KERN_ERR, fnic->lport->host, 632 "BAR0 not memory-map'able, aborting.\n"); 633 err = -ENODEV; 634 goto err_out_release_regions; 635 } 636 637 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 638 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 639 fnic->bar0.len = pci_resource_len(pdev, 0); 640 641 if (!fnic->bar0.vaddr) { 642 shost_printk(KERN_ERR, fnic->lport->host, 643 "Cannot memory-map BAR0 res hdr, " 644 "aborting.\n"); 645 err = -ENODEV; 646 goto err_out_release_regions; 647 } 648 649 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 650 if (!fnic->vdev) { 651 shost_printk(KERN_ERR, fnic->lport->host, 652 "vNIC registration failed, " 653 "aborting.\n"); 654 err = -ENODEV; 655 goto err_out_iounmap; 656 } 657 658 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 659 vnic_dev_open_done, 0); 660 if (err) { 661 shost_printk(KERN_ERR, fnic->lport->host, 662 "vNIC dev open failed, aborting.\n"); 663 goto err_out_vnic_unregister; 664 } 665 666 err = vnic_dev_init(fnic->vdev, 0); 667 if (err) { 668 shost_printk(KERN_ERR, fnic->lport->host, 669 "vNIC dev init failed, aborting.\n"); 670 goto err_out_dev_close; 671 } 672 673 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 674 if (err) { 675 shost_printk(KERN_ERR, fnic->lport->host, 676 "vNIC get MAC addr failed \n"); 677 goto err_out_dev_close; 678 } 679 /* set data_src for point-to-point mode and to keep it non-zero */ 680 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 681 682 /* Get vNIC configuration */ 683 err = fnic_get_vnic_config(fnic); 684 if (err) { 685 shost_printk(KERN_ERR, fnic->lport->host, 686 "Get vNIC configuration failed, " 687 "aborting.\n"); 688 goto err_out_dev_close; 689 } 690 691 /* Configure Maximum Outstanding IO reqs*/ 692 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 693 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 694 max_t(u32, FNIC_MIN_IO_REQ, 695 fnic->config.io_throttle_count)); 696 } 697 fnic->fnic_max_tag_id = host->can_queue; 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