1 // SPDX-License-Identifier: GPL-2.0-only 2 /* 3 * Copyright 2008 Cisco Systems, Inc. All rights reserved. 4 * Copyright 2007 Nuova Systems, Inc. All rights reserved. 5 */ 6 #include <linux/module.h> 7 #include <linux/mempool.h> 8 #include <linux/string.h> 9 #include <linux/slab.h> 10 #include <linux/errno.h> 11 #include <linux/init.h> 12 #include <linux/pci.h> 13 #include <linux/skbuff.h> 14 #include <linux/interrupt.h> 15 #include <linux/spinlock.h> 16 #include <linux/workqueue.h> 17 #include <linux/if_ether.h> 18 #include <scsi/fc/fc_fip.h> 19 #include <scsi/scsi_host.h> 20 #include <scsi/scsi_transport.h> 21 #include <scsi/scsi_transport_fc.h> 22 #include <scsi/scsi_tcq.h> 23 #include <scsi/libfc.h> 24 #include <scsi/fc_frame.h> 25 26 #include "vnic_dev.h" 27 #include "vnic_intr.h" 28 #include "vnic_stats.h" 29 #include "fnic_io.h" 30 #include "fnic_fip.h" 31 #include "fnic.h" 32 33 #define PCI_DEVICE_ID_CISCO_FNIC 0x0045 34 35 /* Timer to poll notification area for events. Used for MSI interrupts */ 36 #define FNIC_NOTIFY_TIMER_PERIOD (2 * HZ) 37 38 static struct kmem_cache *fnic_sgl_cache[FNIC_SGL_NUM_CACHES]; 39 static struct kmem_cache *fnic_io_req_cache; 40 static LIST_HEAD(fnic_list); 41 static DEFINE_SPINLOCK(fnic_list_lock); 42 43 /* Supported devices by fnic module */ 44 static struct pci_device_id fnic_id_table[] = { 45 { PCI_DEVICE(PCI_VENDOR_ID_CISCO, PCI_DEVICE_ID_CISCO_FNIC) }, 46 { 0, } 47 }; 48 49 MODULE_DESCRIPTION(DRV_DESCRIPTION); 50 MODULE_AUTHOR("Abhijeet Joglekar <abjoglek@cisco.com>, " 51 "Joseph R. Eykholt <jeykholt@cisco.com>"); 52 MODULE_LICENSE("GPL v2"); 53 MODULE_VERSION(DRV_VERSION); 54 MODULE_DEVICE_TABLE(pci, fnic_id_table); 55 56 unsigned int fnic_log_level; 57 module_param(fnic_log_level, int, S_IRUGO|S_IWUSR); 58 MODULE_PARM_DESC(fnic_log_level, "bit mask of fnic logging levels"); 59 60 61 unsigned int io_completions = FNIC_DFLT_IO_COMPLETIONS; 62 module_param(io_completions, int, S_IRUGO|S_IWUSR); 63 MODULE_PARM_DESC(io_completions, "Max CQ entries to process at a time"); 64 65 unsigned int fnic_trace_max_pages = 16; 66 module_param(fnic_trace_max_pages, uint, S_IRUGO|S_IWUSR); 67 MODULE_PARM_DESC(fnic_trace_max_pages, "Total allocated memory pages " 68 "for fnic trace buffer"); 69 70 unsigned int fnic_fc_trace_max_pages = 64; 71 module_param(fnic_fc_trace_max_pages, uint, S_IRUGO|S_IWUSR); 72 MODULE_PARM_DESC(fnic_fc_trace_max_pages, 73 "Total allocated memory pages for fc trace buffer"); 74 75 static unsigned int fnic_max_qdepth = FNIC_DFLT_QUEUE_DEPTH; 76 module_param(fnic_max_qdepth, uint, S_IRUGO|S_IWUSR); 77 MODULE_PARM_DESC(fnic_max_qdepth, "Queue depth to report for each LUN"); 78 79 static struct libfc_function_template fnic_transport_template = { 80 .frame_send = fnic_send, 81 .lport_set_port_id = fnic_set_port_id, 82 .fcp_abort_io = fnic_empty_scsi_cleanup, 83 .fcp_cleanup = fnic_empty_scsi_cleanup, 84 .exch_mgr_reset = fnic_exch_mgr_reset 85 }; 86 87 static int fnic_slave_alloc(struct scsi_device *sdev) 88 { 89 struct fc_rport *rport = starget_to_rport(scsi_target(sdev)); 90 91 if (!rport || fc_remote_port_chkready(rport)) 92 return -ENXIO; 93 94 scsi_change_queue_depth(sdev, fnic_max_qdepth); 95 return 0; 96 } 97 98 static const struct scsi_host_template fnic_host_template = { 99 .module = THIS_MODULE, 100 .name = DRV_NAME, 101 .queuecommand = fnic_queuecommand, 102 .eh_timed_out = fc_eh_timed_out, 103 .eh_abort_handler = fnic_abort_cmd, 104 .eh_device_reset_handler = fnic_device_reset, 105 .eh_host_reset_handler = fnic_host_reset, 106 .slave_alloc = fnic_slave_alloc, 107 .change_queue_depth = scsi_change_queue_depth, 108 .this_id = -1, 109 .cmd_per_lun = 3, 110 .can_queue = FNIC_DFLT_IO_REQ, 111 .sg_tablesize = FNIC_MAX_SG_DESC_CNT, 112 .max_sectors = 0xffff, 113 .shost_groups = fnic_host_groups, 114 .track_queue_depth = 1, 115 .cmd_size = sizeof(struct fnic_cmd_priv), 116 }; 117 118 static void 119 fnic_set_rport_dev_loss_tmo(struct fc_rport *rport, u32 timeout) 120 { 121 if (timeout) 122 rport->dev_loss_tmo = timeout; 123 else 124 rport->dev_loss_tmo = 1; 125 } 126 127 static void fnic_get_host_speed(struct Scsi_Host *shost); 128 static struct scsi_transport_template *fnic_fc_transport; 129 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *); 130 static void fnic_reset_host_stats(struct Scsi_Host *); 131 132 static struct fc_function_template fnic_fc_functions = { 133 134 .show_host_node_name = 1, 135 .show_host_port_name = 1, 136 .show_host_supported_classes = 1, 137 .show_host_supported_fc4s = 1, 138 .show_host_active_fc4s = 1, 139 .show_host_maxframe_size = 1, 140 .show_host_port_id = 1, 141 .show_host_supported_speeds = 1, 142 .get_host_speed = fnic_get_host_speed, 143 .show_host_speed = 1, 144 .show_host_port_type = 1, 145 .get_host_port_state = fc_get_host_port_state, 146 .show_host_port_state = 1, 147 .show_host_symbolic_name = 1, 148 .show_rport_maxframe_size = 1, 149 .show_rport_supported_classes = 1, 150 .show_host_fabric_name = 1, 151 .show_starget_node_name = 1, 152 .show_starget_port_name = 1, 153 .show_starget_port_id = 1, 154 .show_rport_dev_loss_tmo = 1, 155 .set_rport_dev_loss_tmo = fnic_set_rport_dev_loss_tmo, 156 .issue_fc_host_lip = fnic_reset, 157 .get_fc_host_stats = fnic_get_stats, 158 .reset_fc_host_stats = fnic_reset_host_stats, 159 .dd_fcrport_size = sizeof(struct fc_rport_libfc_priv), 160 .terminate_rport_io = fnic_terminate_rport_io, 161 .bsg_request = fc_lport_bsg_request, 162 }; 163 164 static void fnic_get_host_speed(struct Scsi_Host *shost) 165 { 166 struct fc_lport *lp = shost_priv(shost); 167 struct fnic *fnic = lport_priv(lp); 168 u32 port_speed = vnic_dev_port_speed(fnic->vdev); 169 170 /* Add in other values as they get defined in fw */ 171 switch (port_speed) { 172 case DCEM_PORTSPEED_10G: 173 fc_host_speed(shost) = FC_PORTSPEED_10GBIT; 174 break; 175 case DCEM_PORTSPEED_20G: 176 fc_host_speed(shost) = FC_PORTSPEED_20GBIT; 177 break; 178 case DCEM_PORTSPEED_25G: 179 fc_host_speed(shost) = FC_PORTSPEED_25GBIT; 180 break; 181 case DCEM_PORTSPEED_40G: 182 case DCEM_PORTSPEED_4x10G: 183 fc_host_speed(shost) = FC_PORTSPEED_40GBIT; 184 break; 185 case DCEM_PORTSPEED_100G: 186 fc_host_speed(shost) = FC_PORTSPEED_100GBIT; 187 break; 188 default: 189 fc_host_speed(shost) = FC_PORTSPEED_UNKNOWN; 190 break; 191 } 192 } 193 194 static struct fc_host_statistics *fnic_get_stats(struct Scsi_Host *host) 195 { 196 int ret; 197 struct fc_lport *lp = shost_priv(host); 198 struct fnic *fnic = lport_priv(lp); 199 struct fc_host_statistics *stats = &lp->host_stats; 200 struct vnic_stats *vs; 201 unsigned long flags; 202 203 if (time_before(jiffies, fnic->stats_time + HZ / FNIC_STATS_RATE_LIMIT)) 204 return stats; 205 fnic->stats_time = jiffies; 206 207 spin_lock_irqsave(&fnic->fnic_lock, flags); 208 ret = vnic_dev_stats_dump(fnic->vdev, &fnic->stats); 209 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 210 211 if (ret) { 212 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 213 "fnic: Get vnic stats failed" 214 " 0x%x", ret); 215 return stats; 216 } 217 vs = fnic->stats; 218 stats->tx_frames = vs->tx.tx_unicast_frames_ok; 219 stats->tx_words = vs->tx.tx_unicast_bytes_ok / 4; 220 stats->rx_frames = vs->rx.rx_unicast_frames_ok; 221 stats->rx_words = vs->rx.rx_unicast_bytes_ok / 4; 222 stats->error_frames = vs->tx.tx_errors + vs->rx.rx_errors; 223 stats->dumped_frames = vs->tx.tx_drops + vs->rx.rx_drop; 224 stats->invalid_crc_count = vs->rx.rx_crc_errors; 225 stats->seconds_since_last_reset = 226 (jiffies - fnic->stats_reset_time) / HZ; 227 stats->fcp_input_megabytes = div_u64(fnic->fcp_input_bytes, 1000000); 228 stats->fcp_output_megabytes = div_u64(fnic->fcp_output_bytes, 1000000); 229 230 return stats; 231 } 232 233 /* 234 * fnic_dump_fchost_stats 235 * note : dumps fc_statistics into system logs 236 */ 237 void fnic_dump_fchost_stats(struct Scsi_Host *host, 238 struct fc_host_statistics *stats) 239 { 240 FNIC_MAIN_NOTE(KERN_NOTICE, host, 241 "fnic: seconds since last reset = %llu\n", 242 stats->seconds_since_last_reset); 243 FNIC_MAIN_NOTE(KERN_NOTICE, host, 244 "fnic: tx frames = %llu\n", 245 stats->tx_frames); 246 FNIC_MAIN_NOTE(KERN_NOTICE, host, 247 "fnic: tx words = %llu\n", 248 stats->tx_words); 249 FNIC_MAIN_NOTE(KERN_NOTICE, host, 250 "fnic: rx frames = %llu\n", 251 stats->rx_frames); 252 FNIC_MAIN_NOTE(KERN_NOTICE, host, 253 "fnic: rx words = %llu\n", 254 stats->rx_words); 255 FNIC_MAIN_NOTE(KERN_NOTICE, host, 256 "fnic: lip count = %llu\n", 257 stats->lip_count); 258 FNIC_MAIN_NOTE(KERN_NOTICE, host, 259 "fnic: nos count = %llu\n", 260 stats->nos_count); 261 FNIC_MAIN_NOTE(KERN_NOTICE, host, 262 "fnic: error frames = %llu\n", 263 stats->error_frames); 264 FNIC_MAIN_NOTE(KERN_NOTICE, host, 265 "fnic: dumped frames = %llu\n", 266 stats->dumped_frames); 267 FNIC_MAIN_NOTE(KERN_NOTICE, host, 268 "fnic: link failure count = %llu\n", 269 stats->link_failure_count); 270 FNIC_MAIN_NOTE(KERN_NOTICE, host, 271 "fnic: loss of sync count = %llu\n", 272 stats->loss_of_sync_count); 273 FNIC_MAIN_NOTE(KERN_NOTICE, host, 274 "fnic: loss of signal count = %llu\n", 275 stats->loss_of_signal_count); 276 FNIC_MAIN_NOTE(KERN_NOTICE, host, 277 "fnic: prim seq protocol err count = %llu\n", 278 stats->prim_seq_protocol_err_count); 279 FNIC_MAIN_NOTE(KERN_NOTICE, host, 280 "fnic: invalid tx word count= %llu\n", 281 stats->invalid_tx_word_count); 282 FNIC_MAIN_NOTE(KERN_NOTICE, host, 283 "fnic: invalid crc count = %llu\n", 284 stats->invalid_crc_count); 285 FNIC_MAIN_NOTE(KERN_NOTICE, host, 286 "fnic: fcp input requests = %llu\n", 287 stats->fcp_input_requests); 288 FNIC_MAIN_NOTE(KERN_NOTICE, host, 289 "fnic: fcp output requests = %llu\n", 290 stats->fcp_output_requests); 291 FNIC_MAIN_NOTE(KERN_NOTICE, host, 292 "fnic: fcp control requests = %llu\n", 293 stats->fcp_control_requests); 294 FNIC_MAIN_NOTE(KERN_NOTICE, host, 295 "fnic: fcp input megabytes = %llu\n", 296 stats->fcp_input_megabytes); 297 FNIC_MAIN_NOTE(KERN_NOTICE, host, 298 "fnic: fcp output megabytes = %llu\n", 299 stats->fcp_output_megabytes); 300 return; 301 } 302 303 /* 304 * fnic_reset_host_stats : clears host stats 305 * note : called when reset_statistics set under sysfs dir 306 */ 307 static void fnic_reset_host_stats(struct Scsi_Host *host) 308 { 309 int ret; 310 struct fc_lport *lp = shost_priv(host); 311 struct fnic *fnic = lport_priv(lp); 312 struct fc_host_statistics *stats; 313 unsigned long flags; 314 315 /* dump current stats, before clearing them */ 316 stats = fnic_get_stats(host); 317 fnic_dump_fchost_stats(host, stats); 318 319 spin_lock_irqsave(&fnic->fnic_lock, flags); 320 ret = vnic_dev_stats_clear(fnic->vdev); 321 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 322 323 if (ret) { 324 FNIC_MAIN_DBG(KERN_DEBUG, fnic->lport->host, 325 "fnic: Reset vnic stats failed" 326 " 0x%x", ret); 327 return; 328 } 329 fnic->stats_reset_time = jiffies; 330 memset(stats, 0, sizeof(*stats)); 331 332 return; 333 } 334 335 void fnic_log_q_error(struct fnic *fnic) 336 { 337 unsigned int i; 338 u32 error_status; 339 340 for (i = 0; i < fnic->raw_wq_count; i++) { 341 error_status = ioread32(&fnic->wq[i].ctrl->error_status); 342 if (error_status) 343 shost_printk(KERN_ERR, fnic->lport->host, 344 "WQ[%d] error_status" 345 " %d\n", i, error_status); 346 } 347 348 for (i = 0; i < fnic->rq_count; i++) { 349 error_status = ioread32(&fnic->rq[i].ctrl->error_status); 350 if (error_status) 351 shost_printk(KERN_ERR, fnic->lport->host, 352 "RQ[%d] error_status" 353 " %d\n", i, error_status); 354 } 355 356 for (i = 0; i < fnic->wq_copy_count; i++) { 357 error_status = ioread32(&fnic->wq_copy[i].ctrl->error_status); 358 if (error_status) 359 shost_printk(KERN_ERR, fnic->lport->host, 360 "CWQ[%d] error_status" 361 " %d\n", i, error_status); 362 } 363 } 364 365 void fnic_handle_link_event(struct fnic *fnic) 366 { 367 unsigned long flags; 368 369 spin_lock_irqsave(&fnic->fnic_lock, flags); 370 if (fnic->stop_rx_link_events) { 371 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 372 return; 373 } 374 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 375 376 queue_work(fnic_event_queue, &fnic->link_work); 377 378 } 379 380 static int fnic_notify_set(struct fnic *fnic) 381 { 382 int err; 383 384 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 385 case VNIC_DEV_INTR_MODE_INTX: 386 err = vnic_dev_notify_set(fnic->vdev, FNIC_INTX_NOTIFY); 387 break; 388 case VNIC_DEV_INTR_MODE_MSI: 389 err = vnic_dev_notify_set(fnic->vdev, -1); 390 break; 391 case VNIC_DEV_INTR_MODE_MSIX: 392 err = vnic_dev_notify_set(fnic->vdev, FNIC_MSIX_ERR_NOTIFY); 393 break; 394 default: 395 shost_printk(KERN_ERR, fnic->lport->host, 396 "Interrupt mode should be set up" 397 " before devcmd notify set %d\n", 398 vnic_dev_get_intr_mode(fnic->vdev)); 399 err = -1; 400 break; 401 } 402 403 return err; 404 } 405 406 static void fnic_notify_timer(struct timer_list *t) 407 { 408 struct fnic *fnic = from_timer(fnic, t, notify_timer); 409 410 fnic_handle_link_event(fnic); 411 mod_timer(&fnic->notify_timer, 412 round_jiffies(jiffies + FNIC_NOTIFY_TIMER_PERIOD)); 413 } 414 415 static void fnic_fip_notify_timer(struct timer_list *t) 416 { 417 struct fnic *fnic = from_timer(fnic, t, fip_timer); 418 419 fnic_handle_fip_timer(fnic); 420 } 421 422 static void fnic_notify_timer_start(struct fnic *fnic) 423 { 424 switch (vnic_dev_get_intr_mode(fnic->vdev)) { 425 case VNIC_DEV_INTR_MODE_MSI: 426 /* 427 * Schedule first timeout immediately. The driver is 428 * initiatialized and ready to look for link up notification 429 */ 430 mod_timer(&fnic->notify_timer, jiffies); 431 break; 432 default: 433 /* Using intr for notification for INTx/MSI-X */ 434 break; 435 } 436 } 437 438 static int fnic_dev_wait(struct vnic_dev *vdev, 439 int (*start)(struct vnic_dev *, int), 440 int (*finished)(struct vnic_dev *, int *), 441 int arg) 442 { 443 unsigned long time; 444 int done; 445 int err; 446 int count; 447 448 count = 0; 449 450 err = start(vdev, arg); 451 if (err) 452 return err; 453 454 /* Wait for func to complete. 455 * Sometime schedule_timeout_uninterruptible take long time 456 * to wake up so we do not retry as we are only waiting for 457 * 2 seconds in while loop. By adding count, we make sure 458 * we try atleast three times before returning -ETIMEDOUT 459 */ 460 time = jiffies + (HZ * 2); 461 do { 462 err = finished(vdev, &done); 463 count++; 464 if (err) 465 return err; 466 if (done) 467 return 0; 468 schedule_timeout_uninterruptible(HZ / 10); 469 } while (time_after(time, jiffies) || (count < 3)); 470 471 return -ETIMEDOUT; 472 } 473 474 static int fnic_cleanup(struct fnic *fnic) 475 { 476 unsigned int i; 477 int err; 478 479 vnic_dev_disable(fnic->vdev); 480 for (i = 0; i < fnic->intr_count; i++) 481 vnic_intr_mask(&fnic->intr[i]); 482 483 for (i = 0; i < fnic->rq_count; i++) { 484 err = vnic_rq_disable(&fnic->rq[i]); 485 if (err) 486 return err; 487 } 488 for (i = 0; i < fnic->raw_wq_count; i++) { 489 err = vnic_wq_disable(&fnic->wq[i]); 490 if (err) 491 return err; 492 } 493 for (i = 0; i < fnic->wq_copy_count; i++) { 494 err = vnic_wq_copy_disable(&fnic->wq_copy[i]); 495 if (err) 496 return err; 497 } 498 499 /* Clean up completed IOs and FCS frames */ 500 fnic_wq_copy_cmpl_handler(fnic, io_completions); 501 fnic_wq_cmpl_handler(fnic, -1); 502 fnic_rq_cmpl_handler(fnic, -1); 503 504 /* Clean up the IOs and FCS frames that have not completed */ 505 for (i = 0; i < fnic->raw_wq_count; i++) 506 vnic_wq_clean(&fnic->wq[i], fnic_free_wq_buf); 507 for (i = 0; i < fnic->rq_count; i++) 508 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 509 for (i = 0; i < fnic->wq_copy_count; i++) 510 vnic_wq_copy_clean(&fnic->wq_copy[i], 511 fnic_wq_copy_cleanup_handler); 512 513 for (i = 0; i < fnic->cq_count; i++) 514 vnic_cq_clean(&fnic->cq[i]); 515 for (i = 0; i < fnic->intr_count; i++) 516 vnic_intr_clean(&fnic->intr[i]); 517 518 mempool_destroy(fnic->io_req_pool); 519 for (i = 0; i < FNIC_SGL_NUM_CACHES; i++) 520 mempool_destroy(fnic->io_sgl_pool[i]); 521 522 return 0; 523 } 524 525 static void fnic_iounmap(struct fnic *fnic) 526 { 527 if (fnic->bar0.vaddr) 528 iounmap(fnic->bar0.vaddr); 529 } 530 531 /** 532 * fnic_get_mac() - get assigned data MAC address for FIP code. 533 * @lport: local port. 534 */ 535 static u8 *fnic_get_mac(struct fc_lport *lport) 536 { 537 struct fnic *fnic = lport_priv(lport); 538 539 return fnic->data_src_addr; 540 } 541 542 static void fnic_set_vlan(struct fnic *fnic, u16 vlan_id) 543 { 544 vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 545 } 546 547 static int fnic_scsi_drv_init(struct fnic *fnic) 548 { 549 struct Scsi_Host *host = fnic->lport->host; 550 551 /* Configure maximum outstanding IO reqs*/ 552 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) 553 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 554 max_t(u32, FNIC_MIN_IO_REQ, 555 fnic->config.io_throttle_count)); 556 557 fnic->fnic_max_tag_id = host->can_queue; 558 host->max_lun = fnic->config.luns_per_tgt; 559 host->max_id = FNIC_MAX_FCP_TARGET; 560 host->max_cmd_len = FCOE_MAX_CMD_LEN; 561 562 host->nr_hw_queues = fnic->wq_copy_count; 563 if (host->nr_hw_queues > 1) 564 shost_printk(KERN_ERR, host, 565 "fnic: blk-mq is not supported"); 566 567 host->nr_hw_queues = fnic->wq_copy_count = 1; 568 569 shost_printk(KERN_INFO, host, 570 "fnic: can_queue: %d max_lun: %llu", 571 host->can_queue, host->max_lun); 572 573 shost_printk(KERN_INFO, host, 574 "fnic: max_id: %d max_cmd_len: %d nr_hw_queues: %d", 575 host->max_id, host->max_cmd_len, host->nr_hw_queues); 576 577 return 0; 578 } 579 580 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 581 { 582 struct Scsi_Host *host; 583 struct fc_lport *lp; 584 struct fnic *fnic; 585 mempool_t *pool; 586 int err; 587 int i; 588 unsigned long flags; 589 590 /* 591 * Allocate SCSI Host and set up association between host, 592 * local port, and fnic 593 */ 594 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 595 if (!lp) { 596 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 597 err = -ENOMEM; 598 goto err_out; 599 } 600 host = lp->host; 601 fnic = lport_priv(lp); 602 fnic->lport = lp; 603 fnic->ctlr.lp = lp; 604 605 fnic->link_events = 0; 606 607 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 608 host->host_no); 609 610 host->transportt = fnic_fc_transport; 611 612 fnic_stats_debugfs_init(fnic); 613 614 /* Setup PCI resources */ 615 pci_set_drvdata(pdev, fnic); 616 617 fnic->pdev = pdev; 618 619 err = pci_enable_device(pdev); 620 if (err) { 621 shost_printk(KERN_ERR, fnic->lport->host, 622 "Cannot enable PCI device, aborting.\n"); 623 goto err_out_free_hba; 624 } 625 626 err = pci_request_regions(pdev, DRV_NAME); 627 if (err) { 628 shost_printk(KERN_ERR, fnic->lport->host, 629 "Cannot enable PCI resources, aborting\n"); 630 goto err_out_disable_device; 631 } 632 633 pci_set_master(pdev); 634 635 /* Query PCI controller on system for DMA addressing 636 * limitation for the device. Try 47-bit first, and 637 * fail to 32-bit. Cisco VIC supports 47 bits only. 638 */ 639 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(47)); 640 if (err) { 641 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 642 if (err) { 643 shost_printk(KERN_ERR, fnic->lport->host, 644 "No usable DMA configuration " 645 "aborting\n"); 646 goto err_out_release_regions; 647 } 648 } 649 650 /* Map vNIC resources from BAR0 */ 651 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 652 shost_printk(KERN_ERR, fnic->lport->host, 653 "BAR0 not memory-map'able, aborting.\n"); 654 err = -ENODEV; 655 goto err_out_release_regions; 656 } 657 658 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 659 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 660 fnic->bar0.len = pci_resource_len(pdev, 0); 661 662 if (!fnic->bar0.vaddr) { 663 shost_printk(KERN_ERR, fnic->lport->host, 664 "Cannot memory-map BAR0 res hdr, " 665 "aborting.\n"); 666 err = -ENODEV; 667 goto err_out_release_regions; 668 } 669 670 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 671 if (!fnic->vdev) { 672 shost_printk(KERN_ERR, fnic->lport->host, 673 "vNIC registration failed, " 674 "aborting.\n"); 675 err = -ENODEV; 676 goto err_out_iounmap; 677 } 678 679 err = vnic_dev_cmd_init(fnic->vdev); 680 if (err) { 681 shost_printk(KERN_ERR, fnic->lport->host, 682 "vnic_dev_cmd_init() returns %d, aborting\n", 683 err); 684 goto err_out_vnic_unregister; 685 } 686 687 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 688 vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST); 689 if (err) { 690 shost_printk(KERN_ERR, fnic->lport->host, 691 "vNIC dev open failed, aborting.\n"); 692 goto err_out_dev_cmd_deinit; 693 } 694 695 err = vnic_dev_init(fnic->vdev, 0); 696 if (err) { 697 shost_printk(KERN_ERR, fnic->lport->host, 698 "vNIC dev init failed, aborting.\n"); 699 goto err_out_dev_close; 700 } 701 702 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 703 if (err) { 704 shost_printk(KERN_ERR, fnic->lport->host, 705 "vNIC get MAC addr failed \n"); 706 goto err_out_dev_close; 707 } 708 /* set data_src for point-to-point mode and to keep it non-zero */ 709 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 710 711 /* Get vNIC configuration */ 712 err = fnic_get_vnic_config(fnic); 713 if (err) { 714 shost_printk(KERN_ERR, fnic->lport->host, 715 "Get vNIC configuration failed, " 716 "aborting.\n"); 717 goto err_out_dev_close; 718 } 719 720 fnic_scsi_drv_init(fnic); 721 722 fnic_get_res_counts(fnic); 723 724 err = fnic_set_intr_mode(fnic); 725 if (err) { 726 shost_printk(KERN_ERR, fnic->lport->host, 727 "Failed to set intr mode, " 728 "aborting.\n"); 729 goto err_out_dev_close; 730 } 731 732 err = fnic_alloc_vnic_resources(fnic); 733 if (err) { 734 shost_printk(KERN_ERR, fnic->lport->host, 735 "Failed to alloc vNIC resources, " 736 "aborting.\n"); 737 goto err_out_clear_intr; 738 } 739 740 741 /* initialize all fnic locks */ 742 spin_lock_init(&fnic->fnic_lock); 743 744 for (i = 0; i < FNIC_WQ_MAX; i++) 745 spin_lock_init(&fnic->wq_lock[i]); 746 747 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 748 spin_lock_init(&fnic->wq_copy_lock[i]); 749 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 750 fnic->fw_ack_recd[i] = 0; 751 fnic->fw_ack_index[i] = -1; 752 } 753 754 for (i = 0; i < FNIC_IO_LOCKS; i++) 755 spin_lock_init(&fnic->io_req_lock[i]); 756 757 err = -ENOMEM; 758 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 759 if (!fnic->io_req_pool) 760 goto err_out_free_resources; 761 762 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 763 if (!pool) 764 goto err_out_free_ioreq_pool; 765 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 766 767 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 768 if (!pool) 769 goto err_out_free_dflt_pool; 770 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 771 772 /* setup vlan config, hw inserts vlan header */ 773 fnic->vlan_hw_insert = 1; 774 fnic->vlan_id = 0; 775 776 /* Initialize the FIP fcoe_ctrl struct */ 777 fnic->ctlr.send = fnic_eth_send; 778 fnic->ctlr.update_mac = fnic_update_mac; 779 fnic->ctlr.get_src_addr = fnic_get_mac; 780 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 781 shost_printk(KERN_INFO, fnic->lport->host, 782 "firmware supports FIP\n"); 783 /* enable directed and multicast */ 784 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 785 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 786 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 787 fnic->set_vlan = fnic_set_vlan; 788 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 789 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0); 790 spin_lock_init(&fnic->vlans_lock); 791 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 792 INIT_WORK(&fnic->event_work, fnic_handle_event); 793 skb_queue_head_init(&fnic->fip_frame_queue); 794 INIT_LIST_HEAD(&fnic->evlist); 795 INIT_LIST_HEAD(&fnic->vlans); 796 } else { 797 shost_printk(KERN_INFO, fnic->lport->host, 798 "firmware uses non-FIP mode\n"); 799 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 800 fnic->ctlr.state = FIP_ST_NON_FIP; 801 } 802 fnic->state = FNIC_IN_FC_MODE; 803 804 atomic_set(&fnic->in_flight, 0); 805 fnic->state_flags = FNIC_FLAGS_NONE; 806 807 /* Enable hardware stripping of vlan header on ingress */ 808 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 809 810 /* Setup notification buffer area */ 811 err = fnic_notify_set(fnic); 812 if (err) { 813 shost_printk(KERN_ERR, fnic->lport->host, 814 "Failed to alloc notify buffer, aborting.\n"); 815 goto err_out_free_max_pool; 816 } 817 818 /* Setup notify timer when using MSI interrupts */ 819 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 820 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0); 821 822 /* allocate RQ buffers and post them to RQ*/ 823 for (i = 0; i < fnic->rq_count; i++) { 824 vnic_rq_enable(&fnic->rq[i]); 825 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 826 if (err) { 827 shost_printk(KERN_ERR, fnic->lport->host, 828 "fnic_alloc_rq_frame can't alloc " 829 "frame\n"); 830 goto err_out_free_rq_buf; 831 } 832 } 833 834 /* 835 * Initialization done with PCI system, hardware, firmware. 836 * Add host to SCSI 837 */ 838 err = scsi_add_host(lp->host, &pdev->dev); 839 if (err) { 840 shost_printk(KERN_ERR, fnic->lport->host, 841 "fnic: scsi_add_host failed...exiting\n"); 842 goto err_out_free_rq_buf; 843 } 844 845 /* Start local port initiatialization */ 846 847 lp->link_up = 0; 848 849 lp->max_retry_count = fnic->config.flogi_retries; 850 lp->max_rport_retry_count = fnic->config.plogi_retries; 851 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 852 FCP_SPPF_CONF_COMPL); 853 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 854 lp->service_params |= FCP_SPPF_RETRY; 855 856 lp->boot_time = jiffies; 857 lp->e_d_tov = fnic->config.ed_tov; 858 lp->r_a_tov = fnic->config.ra_tov; 859 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 860 fc_set_wwnn(lp, fnic->config.node_wwn); 861 fc_set_wwpn(lp, fnic->config.port_wwn); 862 863 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 864 865 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 866 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 867 err = -ENOMEM; 868 goto err_out_remove_scsi_host; 869 } 870 871 fc_lport_init_stats(lp); 872 fnic->stats_reset_time = jiffies; 873 874 fc_lport_config(lp); 875 876 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 877 sizeof(struct fc_frame_header))) { 878 err = -EINVAL; 879 goto err_out_free_exch_mgr; 880 } 881 fc_host_maxframe_size(lp->host) = lp->mfs; 882 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 883 884 sprintf(fc_host_symbolic_name(lp->host), 885 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 886 887 spin_lock_irqsave(&fnic_list_lock, flags); 888 list_add_tail(&fnic->list, &fnic_list); 889 spin_unlock_irqrestore(&fnic_list_lock, flags); 890 891 INIT_WORK(&fnic->link_work, fnic_handle_link); 892 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 893 skb_queue_head_init(&fnic->frame_queue); 894 skb_queue_head_init(&fnic->tx_queue); 895 896 /* Enable all queues */ 897 for (i = 0; i < fnic->raw_wq_count; i++) 898 vnic_wq_enable(&fnic->wq[i]); 899 for (i = 0; i < fnic->wq_copy_count; i++) 900 vnic_wq_copy_enable(&fnic->wq_copy[i]); 901 902 fc_fabric_login(lp); 903 904 err = fnic_request_intr(fnic); 905 if (err) { 906 shost_printk(KERN_ERR, fnic->lport->host, 907 "Unable to request irq.\n"); 908 goto err_out_free_exch_mgr; 909 } 910 911 vnic_dev_enable(fnic->vdev); 912 913 for (i = 0; i < fnic->intr_count; i++) 914 vnic_intr_unmask(&fnic->intr[i]); 915 916 fnic_notify_timer_start(fnic); 917 918 return 0; 919 920 err_out_free_exch_mgr: 921 fc_exch_mgr_free(lp); 922 err_out_remove_scsi_host: 923 fc_remove_host(lp->host); 924 scsi_remove_host(lp->host); 925 err_out_free_rq_buf: 926 for (i = 0; i < fnic->rq_count; i++) 927 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 928 vnic_dev_notify_unset(fnic->vdev); 929 err_out_free_max_pool: 930 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 931 err_out_free_dflt_pool: 932 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 933 err_out_free_ioreq_pool: 934 mempool_destroy(fnic->io_req_pool); 935 err_out_free_resources: 936 fnic_free_vnic_resources(fnic); 937 err_out_clear_intr: 938 fnic_clear_intr_mode(fnic); 939 err_out_dev_close: 940 vnic_dev_close(fnic->vdev); 941 err_out_dev_cmd_deinit: 942 err_out_vnic_unregister: 943 vnic_dev_unregister(fnic->vdev); 944 err_out_iounmap: 945 fnic_iounmap(fnic); 946 err_out_release_regions: 947 pci_release_regions(pdev); 948 err_out_disable_device: 949 pci_disable_device(pdev); 950 err_out_free_hba: 951 fnic_stats_debugfs_remove(fnic); 952 scsi_host_put(lp->host); 953 err_out: 954 return err; 955 } 956 957 static void fnic_remove(struct pci_dev *pdev) 958 { 959 struct fnic *fnic = pci_get_drvdata(pdev); 960 struct fc_lport *lp = fnic->lport; 961 unsigned long flags; 962 963 /* 964 * Mark state so that the workqueue thread stops forwarding 965 * received frames and link events to the local port. ISR and 966 * other threads that can queue work items will also stop 967 * creating work items on the fnic workqueue 968 */ 969 spin_lock_irqsave(&fnic->fnic_lock, flags); 970 fnic->stop_rx_link_events = 1; 971 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 972 973 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 974 del_timer_sync(&fnic->notify_timer); 975 976 /* 977 * Flush the fnic event queue. After this call, there should 978 * be no event queued for this fnic device in the workqueue 979 */ 980 flush_workqueue(fnic_event_queue); 981 skb_queue_purge(&fnic->frame_queue); 982 skb_queue_purge(&fnic->tx_queue); 983 984 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 985 del_timer_sync(&fnic->fip_timer); 986 skb_queue_purge(&fnic->fip_frame_queue); 987 fnic_fcoe_reset_vlans(fnic); 988 fnic_fcoe_evlist_free(fnic); 989 } 990 991 /* 992 * Log off the fabric. This stops all remote ports, dns port, 993 * logs off the fabric. This flushes all rport, disc, lport work 994 * before returning 995 */ 996 fc_fabric_logoff(fnic->lport); 997 998 spin_lock_irqsave(&fnic->fnic_lock, flags); 999 fnic->in_remove = 1; 1000 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1001 1002 fcoe_ctlr_destroy(&fnic->ctlr); 1003 fc_lport_destroy(lp); 1004 fnic_stats_debugfs_remove(fnic); 1005 1006 /* 1007 * This stops the fnic device, masks all interrupts. Completed 1008 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 1009 * cleaned up 1010 */ 1011 fnic_cleanup(fnic); 1012 1013 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 1014 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 1015 1016 spin_lock_irqsave(&fnic_list_lock, flags); 1017 list_del(&fnic->list); 1018 spin_unlock_irqrestore(&fnic_list_lock, flags); 1019 1020 fc_remove_host(fnic->lport->host); 1021 scsi_remove_host(fnic->lport->host); 1022 fc_exch_mgr_free(fnic->lport); 1023 vnic_dev_notify_unset(fnic->vdev); 1024 fnic_free_intr(fnic); 1025 fnic_free_vnic_resources(fnic); 1026 fnic_clear_intr_mode(fnic); 1027 vnic_dev_close(fnic->vdev); 1028 vnic_dev_unregister(fnic->vdev); 1029 fnic_iounmap(fnic); 1030 pci_release_regions(pdev); 1031 pci_disable_device(pdev); 1032 scsi_host_put(lp->host); 1033 } 1034 1035 static struct pci_driver fnic_driver = { 1036 .name = DRV_NAME, 1037 .id_table = fnic_id_table, 1038 .probe = fnic_probe, 1039 .remove = fnic_remove, 1040 }; 1041 1042 static int __init fnic_init_module(void) 1043 { 1044 size_t len; 1045 int err = 0; 1046 1047 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1048 1049 /* Create debugfs entries for fnic */ 1050 err = fnic_debugfs_init(); 1051 if (err < 0) { 1052 printk(KERN_ERR PFX "Failed to create fnic directory " 1053 "for tracing and stats logging\n"); 1054 fnic_debugfs_terminate(); 1055 } 1056 1057 /* Allocate memory for trace buffer */ 1058 err = fnic_trace_buf_init(); 1059 if (err < 0) { 1060 printk(KERN_ERR PFX 1061 "Trace buffer initialization Failed. " 1062 "Fnic Tracing utility is disabled\n"); 1063 fnic_trace_free(); 1064 } 1065 1066 /* Allocate memory for fc trace buffer */ 1067 err = fnic_fc_trace_init(); 1068 if (err < 0) { 1069 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1070 "FC frame tracing utility is disabled\n"); 1071 fnic_fc_trace_free(); 1072 } 1073 1074 /* Create a cache for allocation of default size sgls */ 1075 len = sizeof(struct fnic_dflt_sgl_list); 1076 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1077 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1078 SLAB_HWCACHE_ALIGN, 1079 NULL); 1080 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1081 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1082 err = -ENOMEM; 1083 goto err_create_fnic_sgl_slab_dflt; 1084 } 1085 1086 /* Create a cache for allocation of max size sgls*/ 1087 len = sizeof(struct fnic_sgl_list); 1088 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1089 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1090 SLAB_HWCACHE_ALIGN, 1091 NULL); 1092 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1093 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1094 err = -ENOMEM; 1095 goto err_create_fnic_sgl_slab_max; 1096 } 1097 1098 /* Create a cache of io_req structs for use via mempool */ 1099 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1100 sizeof(struct fnic_io_req), 1101 0, SLAB_HWCACHE_ALIGN, NULL); 1102 if (!fnic_io_req_cache) { 1103 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1104 err = -ENOMEM; 1105 goto err_create_fnic_ioreq_slab; 1106 } 1107 1108 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1109 if (!fnic_event_queue) { 1110 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1111 err = -ENOMEM; 1112 goto err_create_fnic_workq; 1113 } 1114 1115 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1116 if (!fnic_fip_queue) { 1117 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1118 err = -ENOMEM; 1119 goto err_create_fip_workq; 1120 } 1121 1122 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1123 if (!fnic_fc_transport) { 1124 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1125 err = -ENOMEM; 1126 goto err_fc_transport; 1127 } 1128 1129 /* register the driver with PCI system */ 1130 err = pci_register_driver(&fnic_driver); 1131 if (err < 0) { 1132 printk(KERN_ERR PFX "pci register error\n"); 1133 goto err_pci_register; 1134 } 1135 return err; 1136 1137 err_pci_register: 1138 fc_release_transport(fnic_fc_transport); 1139 err_fc_transport: 1140 destroy_workqueue(fnic_fip_queue); 1141 err_create_fip_workq: 1142 destroy_workqueue(fnic_event_queue); 1143 err_create_fnic_workq: 1144 kmem_cache_destroy(fnic_io_req_cache); 1145 err_create_fnic_ioreq_slab: 1146 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1147 err_create_fnic_sgl_slab_max: 1148 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1149 err_create_fnic_sgl_slab_dflt: 1150 fnic_trace_free(); 1151 fnic_fc_trace_free(); 1152 fnic_debugfs_terminate(); 1153 return err; 1154 } 1155 1156 static void __exit fnic_cleanup_module(void) 1157 { 1158 pci_unregister_driver(&fnic_driver); 1159 destroy_workqueue(fnic_event_queue); 1160 if (fnic_fip_queue) 1161 destroy_workqueue(fnic_fip_queue); 1162 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1163 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1164 kmem_cache_destroy(fnic_io_req_cache); 1165 fc_release_transport(fnic_fc_transport); 1166 fnic_trace_free(); 1167 fnic_fc_trace_free(); 1168 fnic_debugfs_terminate(); 1169 } 1170 1171 module_init(fnic_init_module); 1172 module_exit(fnic_cleanup_module); 1173