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 static LIST_HEAD(fnic_list); 53 static 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 73 unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS; 74 module_param(io_completions, int, S_IRUGO|S_IWUSR); 75 MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time"); 76 77 unsigned int fnic_trace_max_pages = 16; 78 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR); 79 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages " 80 "for fnic trace buffer"); 81 82 unsigned int fnic_fc_trace_max_pages = 64; 83 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR); 84 MODULE_PARM_DESC(fnic_fc_trace_max_pages, 85 "Total allocated memory pages for fc trace buffer"); 86 87 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH; 88 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR); 89 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN"); 90 91 static struct libfc_function_template fnic_transport_template = { 92 .frame_send = fnic_send, 93 .lport_set_port_id = fnic_set_port_id, 94 .fcp_abort_io = fnic_empty_scsi_cleanup, 95 .fcp_cleanup = fnic_empty_scsi_cleanup, 96 .exch_mgr_reset = fnic_exch_mgr_reset 97 }; 98 99 static int fnic_slave_alloc(struct scsi_device *sdev) 100 { 101 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 102 103 if (!rport || fc_remote_port_chkready(rport)) 104 return -ENXIO; 105 106 scsi_change_queue_depth(sdev, fnic_max_qdepth); 107 return 0; 108 } 109 110 static struct scsi_host_template fnic_host_template = { 111 .module = THIS_MODULE, 112 .name = DRV_NAME, 113 .queuecommand = fnic_queuecommand, 114 .eh_timed_out = fc_eh_timed_out, 115 .eh_abort_handler = fnic_abort_cmd, 116 .eh_device_reset_handler = fnic_device_reset, 117 .eh_host_reset_handler = fnic_host_reset, 118 .slave_alloc = fnic_slave_alloc, 119 .change_queue_depth = scsi_change_queue_depth, 120 .this_id = -1, 121 .cmd_per_lun = 3, 122 .can_queue = FNIC_DFLT_IO_REQ, 123 .sg_tablesize = FNIC_MAX_SG_DESC_CNT, 124 .max_sectors = 0xffff, 125 .shost_groups = fnic_host_groups, 126 .track_queue_depth = 1, 127 }; 128 129 static void 130 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 131 { 132 if (timeout) 133 rport->dev_loss_tmo = timeout; 134 else 135 rport->dev_loss_tmo = 1; 136 } 137 138 static void fnic_get_host_speed(struct Scsi_Host *shost); 139 static struct scsi_transport_template *fnic_fc_transport; 140 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *); 141 static void fnic_reset_host_stats(struct Scsi_Host *); 142 143 static struct fc_function_template fnic_fc_functions = { 144 145 .show_host_node_name = 1, 146 .show_host_port_name = 1, 147 .show_host_supported_classes = 1, 148 .show_host_supported_fc4s = 1, 149 .show_host_active_fc4s = 1, 150 .show_host_maxframe_size = 1, 151 .show_host_port_id = 1, 152 .show_host_supported_speeds = 1, 153 .get_host_speed = fnic_get_host_speed, 154 .show_host_speed = 1, 155 .show_host_port_type = 1, 156 .get_host_port_state = fc_get_host_port_state, 157 .show_host_port_state = 1, 158 .show_host_symbolic_name = 1, 159 .show_rport_maxframe_size = 1, 160 .show_rport_supported_classes = 1, 161 .show_host_fabric_name = 1, 162 .show_starget_node_name = 1, 163 .show_starget_port_name = 1, 164 .show_starget_port_id = 1, 165 .show_rport_dev_loss_tmo = 1, 166 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, 167 .issue_fc_host_lip = fnic_reset, 168 .get_fc_host_stats = fnic_get_stats, 169 .reset_fc_host_stats = fnic_reset_host_stats, 170 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 171 .terminate_rport_io = fnic_terminate_rport_io, 172 .bsg_request = fc_lport_bsg_request, 173 }; 174 175 static void fnic_get_host_speed(struct Scsi_Host *shost) 176 { 177 struct fc_lport *lp = shost_priv(shost); 178 struct fnic *fnic = lport_priv(lp); 179 u32 port_speed = vnic_dev_port_speed(fnic->vdev); 180 181 /* Add in other values as they get defined in fw */ 182 switch (port_speed) { 183 case DCEM_PORTSPEED_10G: 184 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 185 break; 186 case DCEM_PORTSPEED_20G: 187 fc_host_speed(shost) = FC_PORTSPEED_20GBIT; 188 break; 189 case DCEM_PORTSPEED_25G: 190 fc_host_speed(shost) = FC_PORTSPEED_25GBIT; 191 break; 192 case DCEM_PORTSPEED_40G: 193 case DCEM_PORTSPEED_4x10G: 194 fc_host_speed(shost) = FC_PORTSPEED_40GBIT; 195 break; 196 case DCEM_PORTSPEED_100G: 197 fc_host_speed(shost) = FC_PORTSPEED_100GBIT; 198 break; 199 default: 200 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 201 break; 202 } 203 } 204 205 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host) 206 { 207 int ret; 208 struct fc_lport *lp = shost_priv(host); 209 struct fnic *fnic = lport_priv(lp); 210 struct fc_host_statistics *stats = &lp->host_stats; 211 struct vnic_stats *vs; 212 unsigned long flags; 213 214 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT)) 215 return stats; 216 fnic->stats_time = jiffies; 217 218 spin_lock_irqsave(&fnic->fnic_lock, flags); 219 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats); 220 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 221 222 if (ret) { 223 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 224 "fnic: Get vnic stats failed" 225 " 0x%x", ret); 226 return stats; 227 } 228 vs = fnic->stats; 229 stats->tx_frames = vs->tx.tx_unicast_frames_ok; 230 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4; 231 stats->rx_frames = vs->rx.rx_unicast_frames_ok; 232 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4; 233 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors; 234 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop; 235 stats->invalid_crc_count = vs->rx.rx_crc_errors; 236 stats->seconds_since_last_reset = 237 (jiffies - fnic->stats_reset_time) / HZ; 238 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000); 239 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000); 240 241 return stats; 242 } 243 244 /* 245 * fnic_dump_fchost_stats 246 * note : dumps fc_statistics into system logs 247 */ 248 void fnic_dump_fchost_stats(struct Scsi_Host *host, 249 struct fc_host_statistics *stats) 250 { 251 FNIC_MAIN_NOTE(KERN_NOTICE, host, 252 "fnic: seconds since last reset = %llu\n", 253 stats->seconds_since_last_reset); 254 FNIC_MAIN_NOTE(KERN_NOTICE, host, 255 "fnic: tx frames = %llu\n", 256 stats->tx_frames); 257 FNIC_MAIN_NOTE(KERN_NOTICE, host, 258 "fnic: tx words = %llu\n", 259 stats->tx_words); 260 FNIC_MAIN_NOTE(KERN_NOTICE, host, 261 "fnic: rx frames = %llu\n", 262 stats->rx_frames); 263 FNIC_MAIN_NOTE(KERN_NOTICE, host, 264 "fnic: rx words = %llu\n", 265 stats->rx_words); 266 FNIC_MAIN_NOTE(KERN_NOTICE, host, 267 "fnic: lip count = %llu\n", 268 stats->lip_count); 269 FNIC_MAIN_NOTE(KERN_NOTICE, host, 270 "fnic: nos count = %llu\n", 271 stats->nos_count); 272 FNIC_MAIN_NOTE(KERN_NOTICE, host, 273 "fnic: error frames = %llu\n", 274 stats->error_frames); 275 FNIC_MAIN_NOTE(KERN_NOTICE, host, 276 "fnic: dumped frames = %llu\n", 277 stats->dumped_frames); 278 FNIC_MAIN_NOTE(KERN_NOTICE, host, 279 "fnic: link failure count = %llu\n", 280 stats->link_failure_count); 281 FNIC_MAIN_NOTE(KERN_NOTICE, host, 282 "fnic: loss of sync count = %llu\n", 283 stats->loss_of_sync_count); 284 FNIC_MAIN_NOTE(KERN_NOTICE, host, 285 "fnic: loss of signal count = %llu\n", 286 stats->loss_of_signal_count); 287 FNIC_MAIN_NOTE(KERN_NOTICE, host, 288 "fnic: prim seq protocol err count = %llu\n", 289 stats->prim_seq_protocol_err_count); 290 FNIC_MAIN_NOTE(KERN_NOTICE, host, 291 "fnic: invalid tx word count= %llu\n", 292 stats->invalid_tx_word_count); 293 FNIC_MAIN_NOTE(KERN_NOTICE, host, 294 "fnic: invalid crc count = %llu\n", 295 stats->invalid_crc_count); 296 FNIC_MAIN_NOTE(KERN_NOTICE, host, 297 "fnic: fcp input requests = %llu\n", 298 stats->fcp_input_requests); 299 FNIC_MAIN_NOTE(KERN_NOTICE, host, 300 "fnic: fcp output requests = %llu\n", 301 stats->fcp_output_requests); 302 FNIC_MAIN_NOTE(KERN_NOTICE, host, 303 "fnic: fcp control requests = %llu\n", 304 stats->fcp_control_requests); 305 FNIC_MAIN_NOTE(KERN_NOTICE, host, 306 "fnic: fcp input megabytes = %llu\n", 307 stats->fcp_input_megabytes); 308 FNIC_MAIN_NOTE(KERN_NOTICE, host, 309 "fnic: fcp output megabytes = %llu\n", 310 stats->fcp_output_megabytes); 311 return; 312 } 313 314 /* 315 * fnic_reset_host_stats : clears host stats 316 * note : called when reset_statistics set under sysfs dir 317 */ 318 static void fnic_reset_host_stats(struct Scsi_Host *host) 319 { 320 int ret; 321 struct fc_lport *lp = shost_priv(host); 322 struct fnic *fnic = lport_priv(lp); 323 struct fc_host_statistics *stats; 324 unsigned long flags; 325 326 /* dump current stats, before clearing them */ 327 stats = fnic_get_stats(host); 328 fnic_dump_fchost_stats(host, stats); 329 330 spin_lock_irqsave(&fnic->fnic_lock, flags); 331 ret = vnic_dev_stats_clear(fnic->vdev); 332 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 333 334 if (ret) { 335 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 336 "fnic: Reset vnic stats failed" 337 " 0x%x", ret); 338 return; 339 } 340 fnic->stats_reset_time = jiffies; 341 memset(stats, 0, sizeof(*stats)); 342 343 return; 344 } 345 346 void fnic_log_q_error(struct fnic *fnic) 347 { 348 unsigned int i; 349 u32 error_status; 350 351 for (i = 0; i < fnic->raw_wq_count; i++) { 352 error_status = ioread32(&fnic->wq[i].ctrl->error_status); 353 if (error_status) 354 shost_printk(KERN_ERR, fnic->lport->host, 355 "WQ[%d] error_status" 356 " %d\n", i, error_status); 357 } 358 359 for (i = 0; i < fnic->rq_count; i++) { 360 error_status = ioread32(&fnic->rq[i].ctrl->error_status); 361 if (error_status) 362 shost_printk(KERN_ERR, fnic->lport->host, 363 "RQ[%d] error_status" 364 " %d\n", i, error_status); 365 } 366 367 for (i = 0; i < fnic->wq_copy_count; i++) { 368 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status); 369 if (error_status) 370 shost_printk(KERN_ERR, fnic->lport->host, 371 "CWQ[%d] error_status" 372 " %d\n", i, error_status); 373 } 374 } 375 376 void fnic_handle_link_event(struct fnic *fnic) 377 { 378 unsigned long flags; 379 380 spin_lock_irqsave(&fnic->fnic_lock, flags); 381 if (fnic->stop_rx_link_events) { 382 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 383 return; 384 } 385 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 386 387 queue_work(fnic_event_queue, &fnic->link_work); 388 389 } 390 391 static int fnic_notify_set(struct fnic *fnic) 392 { 393 int err; 394 395 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 396 case VNIC_DEV_INTR_MODE_INTX: 397 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY); 398 break; 399 case VNIC_DEV_INTR_MODE_MSI: 400 err = vnic_dev_notify_set(fnic->vdev, -1); 401 break; 402 case VNIC_DEV_INTR_MODE_MSIX: 403 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY); 404 break; 405 default: 406 shost_printk(KERN_ERR, fnic->lport->host, 407 "Interrupt mode should be set up" 408 " before devcmd notify set %d\n", 409 vnic_dev_get_intr_mode(fnic->vdev)); 410 err = -1; 411 break; 412 } 413 414 return err; 415 } 416 417 static void fnic_notify_timer(struct timer_list *t) 418 { 419 struct fnic *fnic = from_timer(fnic, t, notify_timer); 420 421 fnic_handle_link_event(fnic); 422 mod_timer(&fnic->notify_timer, 423 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD)); 424 } 425 426 static void fnic_fip_notify_timer(struct timer_list *t) 427 { 428 struct fnic *fnic = from_timer(fnic, t, fip_timer); 429 430 fnic_handle_fip_timer(fnic); 431 } 432 433 static void fnic_notify_timer_start(struct fnic *fnic) 434 { 435 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 436 case VNIC_DEV_INTR_MODE_MSI: 437 /* 438 * Schedule first timeout immediately. The driver is 439 * initiatialized and ready to look for link up notification 440 */ 441 mod_timer(&fnic->notify_timer, jiffies); 442 break; 443 default: 444 /* Using intr for notification for INTx/MSI-X */ 445 break; 446 } 447 } 448 449 static int fnic_dev_wait(struct vnic_dev *vdev, 450 int (*start)(struct vnic_dev *, int), 451 int (*finished)(struct vnic_dev *, int *), 452 int arg) 453 { 454 unsigned long time; 455 int done; 456 int err; 457 int count; 458 459 count = 0; 460 461 err = start(vdev, arg); 462 if (err) 463 return err; 464 465 /* Wait for func to complete. 466 * Sometime schedule_timeout_uninterruptible take long time 467 * to wake up so we do not retry as we are only waiting for 468 * 2 seconds in while loop. By adding count, we make sure 469 * we try atleast three times before returning -ETIMEDOUT 470 */ 471 time = jiffies + (HZ * 2); 472 do { 473 err = finished(vdev, &done); 474 count++; 475 if (err) 476 return err; 477 if (done) 478 return 0; 479 schedule_timeout_uninterruptible(HZ / 10); 480 } while (time_after(time, jiffies) || (count < 3)); 481 482 return -ETIMEDOUT; 483 } 484 485 static int fnic_cleanup(struct fnic *fnic) 486 { 487 unsigned int i; 488 int err; 489 490 vnic_dev_disable(fnic->vdev); 491 for (i = 0; i < fnic->intr_count; i++) 492 vnic_intr_mask(&fnic->intr[i]); 493 494 for (i = 0; i < fnic->rq_count; i++) { 495 err = vnic_rq_disable(&fnic->rq[i]); 496 if (err) 497 return err; 498 } 499 for (i = 0; i < fnic->raw_wq_count; i++) { 500 err = vnic_wq_disable(&fnic->wq[i]); 501 if (err) 502 return err; 503 } 504 for (i = 0; i < fnic->wq_copy_count; i++) { 505 err = vnic_wq_copy_disable(&fnic->wq_copy[i]); 506 if (err) 507 return err; 508 } 509 510 /* Clean up completed IOs and FCS frames */ 511 fnic_wq_copy_cmpl_handler(fnic, io_completions); 512 fnic_wq_cmpl_handler(fnic, -1); 513 fnic_rq_cmpl_handler(fnic, -1); 514 515 /* Clean up the IOs and FCS frames that have not completed */ 516 for (i = 0; i < fnic->raw_wq_count; i++) 517 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf); 518 for (i = 0; i < fnic->rq_count; i++) 519 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 520 for (i = 0; i < fnic->wq_copy_count; i++) 521 vnic_wq_copy_clean(&fnic->wq_copy[i], 522 fnic_wq_copy_cleanup_handler); 523 524 for (i = 0; i < fnic->cq_count; i++) 525 vnic_cq_clean(&fnic->cq[i]); 526 for (i = 0; i < fnic->intr_count; i++) 527 vnic_intr_clean(&fnic->intr[i]); 528 529 mempool_destroy(fnic->io_req_pool); 530 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++) 531 mempool_destroy(fnic->io_sgl_pool[i]); 532 533 return 0; 534 } 535 536 static void fnic_iounmap(struct fnic *fnic) 537 { 538 if (fnic->bar0.vaddr) 539 iounmap(fnic->bar0.vaddr); 540 } 541 542 /** 543 * fnic_get_mac() - get assigned data MAC address for FIP code. 544 * @lport: local port. 545 */ 546 static u8 *fnic_get_mac(struct fc_lport *lport) 547 { 548 struct fnic *fnic = lport_priv(lport); 549 550 return fnic->data_src_addr; 551 } 552 553 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id) 554 { 555 vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 556 } 557 558 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 559 { 560 struct Scsi_Host *host; 561 struct fc_lport *lp; 562 struct fnic *fnic; 563 mempool_t *pool; 564 int err; 565 int i; 566 unsigned long flags; 567 568 /* 569 * Allocate SCSI Host and set up association between host, 570 * local port, and fnic 571 */ 572 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 573 if (!lp) { 574 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 575 err = -ENOMEM; 576 goto err_out; 577 } 578 host = lp->host; 579 fnic = lport_priv(lp); 580 fnic->lport = lp; 581 fnic->ctlr.lp = lp; 582 583 fnic->link_events = 0; 584 585 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 586 host->host_no); 587 588 host->transportt = fnic_fc_transport; 589 590 fnic_stats_debugfs_init(fnic); 591 592 /* Setup PCI resources */ 593 pci_set_drvdata(pdev, fnic); 594 595 fnic->pdev = pdev; 596 597 err = pci_enable_device(pdev); 598 if (err) { 599 shost_printk(KERN_ERR, fnic->lport->host, 600 "Cannot enable PCI device, aborting.\n"); 601 goto err_out_free_hba; 602 } 603 604 err = pci_request_regions(pdev, DRV_NAME); 605 if (err) { 606 shost_printk(KERN_ERR, fnic->lport->host, 607 "Cannot enable PCI resources, aborting\n"); 608 goto err_out_disable_device; 609 } 610 611 pci_set_master(pdev); 612 613 /* Query PCI controller on system for DMA addressing 614 * limitation for the device. Try 64-bit first, and 615 * fail to 32-bit. 616 */ 617 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 618 if (err) { 619 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 620 if (err) { 621 shost_printk(KERN_ERR, fnic->lport->host, 622 "No usable DMA configuration " 623 "aborting\n"); 624 goto err_out_release_regions; 625 } 626 } 627 628 /* Map vNIC resources from BAR0 */ 629 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 630 shost_printk(KERN_ERR, fnic->lport->host, 631 "BAR0 not memory-map'able, aborting.\n"); 632 err = -ENODEV; 633 goto err_out_release_regions; 634 } 635 636 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 637 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 638 fnic->bar0.len = pci_resource_len(pdev, 0); 639 640 if (!fnic->bar0.vaddr) { 641 shost_printk(KERN_ERR, fnic->lport->host, 642 "Cannot memory-map BAR0 res hdr, " 643 "aborting.\n"); 644 err = -ENODEV; 645 goto err_out_release_regions; 646 } 647 648 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 649 if (!fnic->vdev) { 650 shost_printk(KERN_ERR, fnic->lport->host, 651 "vNIC registration failed, " 652 "aborting.\n"); 653 err = -ENODEV; 654 goto err_out_iounmap; 655 } 656 657 err = vnic_dev_cmd_init(fnic->vdev); 658 if (err) { 659 shost_printk(KERN_ERR, fnic->lport->host, 660 "vnic_dev_cmd_init() returns %d, aborting\n", 661 err); 662 goto err_out_vnic_unregister; 663 } 664 665 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 666 vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST); 667 if (err) { 668 shost_printk(KERN_ERR, fnic->lport->host, 669 "vNIC dev open failed, aborting.\n"); 670 goto err_out_dev_cmd_deinit; 671 } 672 673 err = vnic_dev_init(fnic->vdev, 0); 674 if (err) { 675 shost_printk(KERN_ERR, fnic->lport->host, 676 "vNIC dev init failed, aborting.\n"); 677 goto err_out_dev_close; 678 } 679 680 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 681 if (err) { 682 shost_printk(KERN_ERR, fnic->lport->host, 683 "vNIC get MAC addr failed \n"); 684 goto err_out_dev_close; 685 } 686 /* set data_src for point-to-point mode and to keep it non-zero */ 687 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 688 689 /* Get vNIC configuration */ 690 err = fnic_get_vnic_config(fnic); 691 if (err) { 692 shost_printk(KERN_ERR, fnic->lport->host, 693 "Get vNIC configuration failed, " 694 "aborting.\n"); 695 goto err_out_dev_close; 696 } 697 698 /* Configure Maximum Outstanding IO reqs*/ 699 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 700 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 701 max_t(u32, FNIC_MIN_IO_REQ, 702 fnic->config.io_throttle_count)); 703 } 704 fnic->fnic_max_tag_id = host->can_queue; 705 706 host->max_lun = fnic->config.luns_per_tgt; 707 host->max_id = FNIC_MAX_FCP_TARGET; 708 host->max_cmd_len = FCOE_MAX_CMD_LEN; 709 710 fnic_get_res_counts(fnic); 711 712 err = fnic_set_intr_mode(fnic); 713 if (err) { 714 shost_printk(KERN_ERR, fnic->lport->host, 715 "Failed to set intr mode, " 716 "aborting.\n"); 717 goto err_out_dev_close; 718 } 719 720 err = fnic_alloc_vnic_resources(fnic); 721 if (err) { 722 shost_printk(KERN_ERR, fnic->lport->host, 723 "Failed to alloc vNIC resources, " 724 "aborting.\n"); 725 goto err_out_clear_intr; 726 } 727 728 729 /* initialize all fnic locks */ 730 spin_lock_init(&fnic->fnic_lock); 731 732 for (i = 0; i < FNIC_WQ_MAX; i++) 733 spin_lock_init(&fnic->wq_lock[i]); 734 735 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 736 spin_lock_init(&fnic->wq_copy_lock[i]); 737 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 738 fnic->fw_ack_recd[i] = 0; 739 fnic->fw_ack_index[i] = -1; 740 } 741 742 for (i = 0; i < FNIC_IO_LOCKS; i++) 743 spin_lock_init(&fnic->io_req_lock[i]); 744 745 err = -ENOMEM; 746 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 747 if (!fnic->io_req_pool) 748 goto err_out_free_resources; 749 750 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 751 if (!pool) 752 goto err_out_free_ioreq_pool; 753 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 754 755 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 756 if (!pool) 757 goto err_out_free_dflt_pool; 758 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 759 760 /* setup vlan config, hw inserts vlan header */ 761 fnic->vlan_hw_insert = 1; 762 fnic->vlan_id = 0; 763 764 /* Initialize the FIP fcoe_ctrl struct */ 765 fnic->ctlr.send = fnic_eth_send; 766 fnic->ctlr.update_mac = fnic_update_mac; 767 fnic->ctlr.get_src_addr = fnic_get_mac; 768 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 769 shost_printk(KERN_INFO, fnic->lport->host, 770 "firmware supports FIP\n"); 771 /* enable directed and multicast */ 772 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 773 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 774 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 775 fnic->set_vlan = fnic_set_vlan; 776 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 777 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0); 778 spin_lock_init(&fnic->vlans_lock); 779 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 780 INIT_WORK(&fnic->event_work, fnic_handle_event); 781 skb_queue_head_init(&fnic->fip_frame_queue); 782 INIT_LIST_HEAD(&fnic->evlist); 783 INIT_LIST_HEAD(&fnic->vlans); 784 } else { 785 shost_printk(KERN_INFO, fnic->lport->host, 786 "firmware uses non-FIP mode\n"); 787 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 788 fnic->ctlr.state = FIP_ST_NON_FIP; 789 } 790 fnic->state = FNIC_IN_FC_MODE; 791 792 atomic_set(&fnic->in_flight, 0); 793 fnic->state_flags = FNIC_FLAGS_NONE; 794 795 /* Enable hardware stripping of vlan header on ingress */ 796 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 797 798 /* Setup notification buffer area */ 799 err = fnic_notify_set(fnic); 800 if (err) { 801 shost_printk(KERN_ERR, fnic->lport->host, 802 "Failed to alloc notify buffer, aborting.\n"); 803 goto err_out_free_max_pool; 804 } 805 806 /* Setup notify timer when using MSI interrupts */ 807 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 808 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0); 809 810 /* allocate RQ buffers and post them to RQ*/ 811 for (i = 0; i < fnic->rq_count; i++) { 812 vnic_rq_enable(&fnic->rq[i]); 813 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 814 if (err) { 815 shost_printk(KERN_ERR, fnic->lport->host, 816 "fnic_alloc_rq_frame can't alloc " 817 "frame\n"); 818 goto err_out_free_rq_buf; 819 } 820 } 821 822 /* 823 * Initialization done with PCI system, hardware, firmware. 824 * Add host to SCSI 825 */ 826 err = scsi_add_host(lp->host, &pdev->dev); 827 if (err) { 828 shost_printk(KERN_ERR, fnic->lport->host, 829 "fnic: scsi_add_host failed...exiting\n"); 830 goto err_out_free_rq_buf; 831 } 832 833 /* Start local port initiatialization */ 834 835 lp->link_up = 0; 836 837 lp->max_retry_count = fnic->config.flogi_retries; 838 lp->max_rport_retry_count = fnic->config.plogi_retries; 839 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 840 FCP_SPPF_CONF_COMPL); 841 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 842 lp->service_params |= FCP_SPPF_RETRY; 843 844 lp->boot_time = jiffies; 845 lp->e_d_tov = fnic->config.ed_tov; 846 lp->r_a_tov = fnic->config.ra_tov; 847 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 848 fc_set_wwnn(lp, fnic->config.node_wwn); 849 fc_set_wwpn(lp, fnic->config.port_wwn); 850 851 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 852 853 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 854 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 855 err = -ENOMEM; 856 goto err_out_remove_scsi_host; 857 } 858 859 fc_lport_init_stats(lp); 860 fnic->stats_reset_time = jiffies; 861 862 fc_lport_config(lp); 863 864 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 865 sizeof(struct fc_frame_header))) { 866 err = -EINVAL; 867 goto err_out_free_exch_mgr; 868 } 869 fc_host_maxframe_size(lp->host) = lp->mfs; 870 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 871 872 sprintf(fc_host_symbolic_name(lp->host), 873 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 874 875 spin_lock_irqsave(&fnic_list_lock, flags); 876 list_add_tail(&fnic->list, &fnic_list); 877 spin_unlock_irqrestore(&fnic_list_lock, flags); 878 879 INIT_WORK(&fnic->link_work, fnic_handle_link); 880 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 881 skb_queue_head_init(&fnic->frame_queue); 882 skb_queue_head_init(&fnic->tx_queue); 883 884 /* Enable all queues */ 885 for (i = 0; i < fnic->raw_wq_count; i++) 886 vnic_wq_enable(&fnic->wq[i]); 887 for (i = 0; i < fnic->wq_copy_count; i++) 888 vnic_wq_copy_enable(&fnic->wq_copy[i]); 889 890 fc_fabric_login(lp); 891 892 err = fnic_request_intr(fnic); 893 if (err) { 894 shost_printk(KERN_ERR, fnic->lport->host, 895 "Unable to request irq.\n"); 896 goto err_out_free_exch_mgr; 897 } 898 899 vnic_dev_enable(fnic->vdev); 900 901 for (i = 0; i < fnic->intr_count; i++) 902 vnic_intr_unmask(&fnic->intr[i]); 903 904 fnic_notify_timer_start(fnic); 905 906 return 0; 907 908 err_out_free_exch_mgr: 909 fc_exch_mgr_free(lp); 910 err_out_remove_scsi_host: 911 fc_remove_host(lp->host); 912 scsi_remove_host(lp->host); 913 err_out_free_rq_buf: 914 for (i = 0; i < fnic->rq_count; i++) 915 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 916 vnic_dev_notify_unset(fnic->vdev); 917 err_out_free_max_pool: 918 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 919 err_out_free_dflt_pool: 920 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 921 err_out_free_ioreq_pool: 922 mempool_destroy(fnic->io_req_pool); 923 err_out_free_resources: 924 fnic_free_vnic_resources(fnic); 925 err_out_clear_intr: 926 fnic_clear_intr_mode(fnic); 927 err_out_dev_close: 928 vnic_dev_close(fnic->vdev); 929 err_out_dev_cmd_deinit: 930 err_out_vnic_unregister: 931 vnic_dev_unregister(fnic->vdev); 932 err_out_iounmap: 933 fnic_iounmap(fnic); 934 err_out_release_regions: 935 pci_release_regions(pdev); 936 err_out_disable_device: 937 pci_disable_device(pdev); 938 err_out_free_hba: 939 fnic_stats_debugfs_remove(fnic); 940 scsi_host_put(lp->host); 941 err_out: 942 return err; 943 } 944 945 static void fnic_remove(struct pci_dev *pdev) 946 { 947 struct fnic *fnic = pci_get_drvdata(pdev); 948 struct fc_lport *lp = fnic->lport; 949 unsigned long flags; 950 951 /* 952 * Mark state so that the workqueue thread stops forwarding 953 * received frames and link events to the local port. ISR and 954 * other threads that can queue work items will also stop 955 * creating work items on the fnic workqueue 956 */ 957 spin_lock_irqsave(&fnic->fnic_lock, flags); 958 fnic->stop_rx_link_events = 1; 959 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 960 961 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 962 del_timer_sync(&fnic->notify_timer); 963 964 /* 965 * Flush the fnic event queue. After this call, there should 966 * be no event queued for this fnic device in the workqueue 967 */ 968 flush_workqueue(fnic_event_queue); 969 skb_queue_purge(&fnic->frame_queue); 970 skb_queue_purge(&fnic->tx_queue); 971 972 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 973 del_timer_sync(&fnic->fip_timer); 974 skb_queue_purge(&fnic->fip_frame_queue); 975 fnic_fcoe_reset_vlans(fnic); 976 fnic_fcoe_evlist_free(fnic); 977 } 978 979 /* 980 * Log off the fabric. This stops all remote ports, dns port, 981 * logs off the fabric. This flushes all rport, disc, lport work 982 * before returning 983 */ 984 fc_fabric_logoff(fnic->lport); 985 986 spin_lock_irqsave(&fnic->fnic_lock, flags); 987 fnic->in_remove = 1; 988 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 989 990 fcoe_ctlr_destroy(&fnic->ctlr); 991 fc_lport_destroy(lp); 992 fnic_stats_debugfs_remove(fnic); 993 994 /* 995 * This stops the fnic device, masks all interrupts. Completed 996 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 997 * cleaned up 998 */ 999 fnic_cleanup(fnic); 1000 1001 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 1002 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 1003 1004 spin_lock_irqsave(&fnic_list_lock, flags); 1005 list_del(&fnic->list); 1006 spin_unlock_irqrestore(&fnic_list_lock, flags); 1007 1008 fc_remove_host(fnic->lport->host); 1009 scsi_remove_host(fnic->lport->host); 1010 fc_exch_mgr_free(fnic->lport); 1011 vnic_dev_notify_unset(fnic->vdev); 1012 fnic_free_intr(fnic); 1013 fnic_free_vnic_resources(fnic); 1014 fnic_clear_intr_mode(fnic); 1015 vnic_dev_close(fnic->vdev); 1016 vnic_dev_unregister(fnic->vdev); 1017 fnic_iounmap(fnic); 1018 pci_release_regions(pdev); 1019 pci_disable_device(pdev); 1020 scsi_host_put(lp->host); 1021 } 1022 1023 static struct pci_driver fnic_driver = { 1024 .name = DRV_NAME, 1025 .id_table = fnic_id_table, 1026 .probe = fnic_probe, 1027 .remove = fnic_remove, 1028 }; 1029 1030 static int __init fnic_init_module(void) 1031 { 1032 size_t len; 1033 int err = 0; 1034 1035 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1036 1037 /* Create debugfs entries for fnic */ 1038 err = fnic_debugfs_init(); 1039 if (err < 0) { 1040 printk(KERN_ERR PFX "Failed to create fnic directory " 1041 "for tracing and stats logging\n"); 1042 fnic_debugfs_terminate(); 1043 } 1044 1045 /* Allocate memory for trace buffer */ 1046 err = fnic_trace_buf_init(); 1047 if (err < 0) { 1048 printk(KERN_ERR PFX 1049 "Trace buffer initialization Failed. " 1050 "Fnic Tracing utility is disabled\n"); 1051 fnic_trace_free(); 1052 } 1053 1054 /* Allocate memory for fc trace buffer */ 1055 err = fnic_fc_trace_init(); 1056 if (err < 0) { 1057 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1058 "FC frame tracing utility is disabled\n"); 1059 fnic_fc_trace_free(); 1060 } 1061 1062 /* Create a cache for allocation of default size sgls */ 1063 len = sizeof(struct fnic_dflt_sgl_list); 1064 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1065 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1066 SLAB_HWCACHE_ALIGN, 1067 NULL); 1068 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1069 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1070 err = -ENOMEM; 1071 goto err_create_fnic_sgl_slab_dflt; 1072 } 1073 1074 /* Create a cache for allocation of max size sgls*/ 1075 len = sizeof(struct fnic_sgl_list); 1076 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1077 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1078 SLAB_HWCACHE_ALIGN, 1079 NULL); 1080 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1081 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1082 err = -ENOMEM; 1083 goto err_create_fnic_sgl_slab_max; 1084 } 1085 1086 /* Create a cache of io_req structs for use via mempool */ 1087 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1088 sizeof(struct fnic_io_req), 1089 0, SLAB_HWCACHE_ALIGN, NULL); 1090 if (!fnic_io_req_cache) { 1091 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1092 err = -ENOMEM; 1093 goto err_create_fnic_ioreq_slab; 1094 } 1095 1096 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1097 if (!fnic_event_queue) { 1098 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1099 err = -ENOMEM; 1100 goto err_create_fnic_workq; 1101 } 1102 1103 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1104 if (!fnic_fip_queue) { 1105 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1106 err = -ENOMEM; 1107 goto err_create_fip_workq; 1108 } 1109 1110 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1111 if (!fnic_fc_transport) { 1112 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1113 err = -ENOMEM; 1114 goto err_fc_transport; 1115 } 1116 1117 /* register the driver with PCI system */ 1118 err = pci_register_driver(&fnic_driver); 1119 if (err < 0) { 1120 printk(KERN_ERR PFX "pci register error\n"); 1121 goto err_pci_register; 1122 } 1123 return err; 1124 1125 err_pci_register: 1126 fc_release_transport(fnic_fc_transport); 1127 err_fc_transport: 1128 destroy_workqueue(fnic_fip_queue); 1129 err_create_fip_workq: 1130 destroy_workqueue(fnic_event_queue); 1131 err_create_fnic_workq: 1132 kmem_cache_destroy(fnic_io_req_cache); 1133 err_create_fnic_ioreq_slab: 1134 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1135 err_create_fnic_sgl_slab_max: 1136 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1137 err_create_fnic_sgl_slab_dflt: 1138 fnic_trace_free(); 1139 fnic_fc_trace_free(); 1140 fnic_debugfs_terminate(); 1141 return err; 1142 } 1143 1144 static void __exit fnic_cleanup_module(void) 1145 { 1146 pci_unregister_driver(&fnic_driver); 1147 destroy_workqueue(fnic_event_queue); 1148 if (fnic_fip_queue) { 1149 flush_workqueue(fnic_fip_queue); 1150 destroy_workqueue(fnic_fip_queue); 1151 } 1152 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1153 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1154 kmem_cache_destroy(fnic_io_req_cache); 1155 fc_release_transport(fnic_fc_transport); 1156 fnic_trace_free(); 1157 fnic_fc_trace_free(); 1158 fnic_debugfs_terminate(); 1159 } 1160 1161 module_init(fnic_init_module); 1162 module_exit(fnic_cleanup_module); 1163 1164