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 spin_lock_init(&fnic->sgreset_lock); 758 759 err = -ENOMEM; 760 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 761 if (!fnic->io_req_pool) 762 goto err_out_free_resources; 763 764 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 765 if (!pool) 766 goto err_out_free_ioreq_pool; 767 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 768 769 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 770 if (!pool) 771 goto err_out_free_dflt_pool; 772 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 773 774 /* setup vlan config, hw inserts vlan header */ 775 fnic->vlan_hw_insert = 1; 776 fnic->vlan_id = 0; 777 778 /* Initialize the FIP fcoe_ctrl struct */ 779 fnic->ctlr.send = fnic_eth_send; 780 fnic->ctlr.update_mac = fnic_update_mac; 781 fnic->ctlr.get_src_addr = fnic_get_mac; 782 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 783 shost_printk(KERN_INFO, fnic->lport->host, 784 "firmware supports FIP\n"); 785 /* enable directed and multicast */ 786 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 787 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 788 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 789 fnic->set_vlan = fnic_set_vlan; 790 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 791 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0); 792 spin_lock_init(&fnic->vlans_lock); 793 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 794 INIT_WORK(&fnic->event_work, fnic_handle_event); 795 skb_queue_head_init(&fnic->fip_frame_queue); 796 INIT_LIST_HEAD(&fnic->evlist); 797 INIT_LIST_HEAD(&fnic->vlans); 798 } else { 799 shost_printk(KERN_INFO, fnic->lport->host, 800 "firmware uses non-FIP mode\n"); 801 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 802 fnic->ctlr.state = FIP_ST_NON_FIP; 803 } 804 fnic->state = FNIC_IN_FC_MODE; 805 806 atomic_set(&fnic->in_flight, 0); 807 fnic->state_flags = FNIC_FLAGS_NONE; 808 809 /* Enable hardware stripping of vlan header on ingress */ 810 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 811 812 /* Setup notification buffer area */ 813 err = fnic_notify_set(fnic); 814 if (err) { 815 shost_printk(KERN_ERR, fnic->lport->host, 816 "Failed to alloc notify buffer, aborting.\n"); 817 goto err_out_free_max_pool; 818 } 819 820 /* Setup notify timer when using MSI interrupts */ 821 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 822 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0); 823 824 /* allocate RQ buffers and post them to RQ*/ 825 for (i = 0; i < fnic->rq_count; i++) { 826 vnic_rq_enable(&fnic->rq[i]); 827 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 828 if (err) { 829 shost_printk(KERN_ERR, fnic->lport->host, 830 "fnic_alloc_rq_frame can't alloc " 831 "frame\n"); 832 goto err_out_free_rq_buf; 833 } 834 } 835 836 /* 837 * Initialization done with PCI system, hardware, firmware. 838 * Add host to SCSI 839 */ 840 err = scsi_add_host(lp->host, &pdev->dev); 841 if (err) { 842 shost_printk(KERN_ERR, fnic->lport->host, 843 "fnic: scsi_add_host failed...exiting\n"); 844 goto err_out_free_rq_buf; 845 } 846 847 /* Start local port initiatialization */ 848 849 lp->link_up = 0; 850 851 lp->max_retry_count = fnic->config.flogi_retries; 852 lp->max_rport_retry_count = fnic->config.plogi_retries; 853 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 854 FCP_SPPF_CONF_COMPL); 855 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 856 lp->service_params |= FCP_SPPF_RETRY; 857 858 lp->boot_time = jiffies; 859 lp->e_d_tov = fnic->config.ed_tov; 860 lp->r_a_tov = fnic->config.ra_tov; 861 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 862 fc_set_wwnn(lp, fnic->config.node_wwn); 863 fc_set_wwpn(lp, fnic->config.port_wwn); 864 865 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 866 867 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 868 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 869 err = -ENOMEM; 870 goto err_out_remove_scsi_host; 871 } 872 873 fc_lport_init_stats(lp); 874 fnic->stats_reset_time = jiffies; 875 876 fc_lport_config(lp); 877 878 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 879 sizeof(struct fc_frame_header))) { 880 err = -EINVAL; 881 goto err_out_free_exch_mgr; 882 } 883 fc_host_maxframe_size(lp->host) = lp->mfs; 884 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 885 886 sprintf(fc_host_symbolic_name(lp->host), 887 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 888 889 spin_lock_irqsave(&fnic_list_lock, flags); 890 list_add_tail(&fnic->list, &fnic_list); 891 spin_unlock_irqrestore(&fnic_list_lock, flags); 892 893 INIT_WORK(&fnic->link_work, fnic_handle_link); 894 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 895 skb_queue_head_init(&fnic->frame_queue); 896 skb_queue_head_init(&fnic->tx_queue); 897 898 /* Enable all queues */ 899 for (i = 0; i < fnic->raw_wq_count; i++) 900 vnic_wq_enable(&fnic->wq[i]); 901 for (i = 0; i < fnic->wq_copy_count; i++) 902 vnic_wq_copy_enable(&fnic->wq_copy[i]); 903 904 fc_fabric_login(lp); 905 906 err = fnic_request_intr(fnic); 907 if (err) { 908 shost_printk(KERN_ERR, fnic->lport->host, 909 "Unable to request irq.\n"); 910 goto err_out_free_exch_mgr; 911 } 912 913 vnic_dev_enable(fnic->vdev); 914 915 for (i = 0; i < fnic->intr_count; i++) 916 vnic_intr_unmask(&fnic->intr[i]); 917 918 fnic_notify_timer_start(fnic); 919 920 return 0; 921 922 err_out_free_exch_mgr: 923 fc_exch_mgr_free(lp); 924 err_out_remove_scsi_host: 925 fc_remove_host(lp->host); 926 scsi_remove_host(lp->host); 927 err_out_free_rq_buf: 928 for (i = 0; i < fnic->rq_count; i++) 929 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 930 vnic_dev_notify_unset(fnic->vdev); 931 err_out_free_max_pool: 932 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 933 err_out_free_dflt_pool: 934 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 935 err_out_free_ioreq_pool: 936 mempool_destroy(fnic->io_req_pool); 937 err_out_free_resources: 938 fnic_free_vnic_resources(fnic); 939 err_out_clear_intr: 940 fnic_clear_intr_mode(fnic); 941 err_out_dev_close: 942 vnic_dev_close(fnic->vdev); 943 err_out_dev_cmd_deinit: 944 err_out_vnic_unregister: 945 vnic_dev_unregister(fnic->vdev); 946 err_out_iounmap: 947 fnic_iounmap(fnic); 948 err_out_release_regions: 949 pci_release_regions(pdev); 950 err_out_disable_device: 951 pci_disable_device(pdev); 952 err_out_free_hba: 953 fnic_stats_debugfs_remove(fnic); 954 scsi_host_put(lp->host); 955 err_out: 956 return err; 957 } 958 959 static void fnic_remove(struct pci_dev *pdev) 960 { 961 struct fnic *fnic = pci_get_drvdata(pdev); 962 struct fc_lport *lp = fnic->lport; 963 unsigned long flags; 964 965 /* 966 * Mark state so that the workqueue thread stops forwarding 967 * received frames and link events to the local port. ISR and 968 * other threads that can queue work items will also stop 969 * creating work items on the fnic workqueue 970 */ 971 spin_lock_irqsave(&fnic->fnic_lock, flags); 972 fnic->stop_rx_link_events = 1; 973 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 974 975 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 976 del_timer_sync(&fnic->notify_timer); 977 978 /* 979 * Flush the fnic event queue. After this call, there should 980 * be no event queued for this fnic device in the workqueue 981 */ 982 flush_workqueue(fnic_event_queue); 983 skb_queue_purge(&fnic->frame_queue); 984 skb_queue_purge(&fnic->tx_queue); 985 986 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 987 del_timer_sync(&fnic->fip_timer); 988 skb_queue_purge(&fnic->fip_frame_queue); 989 fnic_fcoe_reset_vlans(fnic); 990 fnic_fcoe_evlist_free(fnic); 991 } 992 993 /* 994 * Log off the fabric. This stops all remote ports, dns port, 995 * logs off the fabric. This flushes all rport, disc, lport work 996 * before returning 997 */ 998 fc_fabric_logoff(fnic->lport); 999 1000 spin_lock_irqsave(&fnic->fnic_lock, flags); 1001 fnic->in_remove = 1; 1002 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 1003 1004 fcoe_ctlr_destroy(&fnic->ctlr); 1005 fc_lport_destroy(lp); 1006 fnic_stats_debugfs_remove(fnic); 1007 1008 /* 1009 * This stops the fnic device, masks all interrupts. Completed 1010 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 1011 * cleaned up 1012 */ 1013 fnic_cleanup(fnic); 1014 1015 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 1016 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 1017 1018 spin_lock_irqsave(&fnic_list_lock, flags); 1019 list_del(&fnic->list); 1020 spin_unlock_irqrestore(&fnic_list_lock, flags); 1021 1022 fc_remove_host(fnic->lport->host); 1023 scsi_remove_host(fnic->lport->host); 1024 fc_exch_mgr_free(fnic->lport); 1025 vnic_dev_notify_unset(fnic->vdev); 1026 fnic_free_intr(fnic); 1027 fnic_free_vnic_resources(fnic); 1028 fnic_clear_intr_mode(fnic); 1029 vnic_dev_close(fnic->vdev); 1030 vnic_dev_unregister(fnic->vdev); 1031 fnic_iounmap(fnic); 1032 pci_release_regions(pdev); 1033 pci_disable_device(pdev); 1034 scsi_host_put(lp->host); 1035 } 1036 1037 static struct pci_driver fnic_driver = { 1038 .name = DRV_NAME, 1039 .id_table = fnic_id_table, 1040 .probe = fnic_probe, 1041 .remove = fnic_remove, 1042 }; 1043 1044 static int __init fnic_init_module(void) 1045 { 1046 size_t len; 1047 int err = 0; 1048 1049 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1050 1051 /* Create debugfs entries for fnic */ 1052 err = fnic_debugfs_init(); 1053 if (err < 0) { 1054 printk(KERN_ERR PFX "Failed to create fnic directory " 1055 "for tracing and stats logging\n"); 1056 fnic_debugfs_terminate(); 1057 } 1058 1059 /* Allocate memory for trace buffer */ 1060 err = fnic_trace_buf_init(); 1061 if (err < 0) { 1062 printk(KERN_ERR PFX 1063 "Trace buffer initialization Failed. " 1064 "Fnic Tracing utility is disabled\n"); 1065 fnic_trace_free(); 1066 } 1067 1068 /* Allocate memory for fc trace buffer */ 1069 err = fnic_fc_trace_init(); 1070 if (err < 0) { 1071 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1072 "FC frame tracing utility is disabled\n"); 1073 fnic_fc_trace_free(); 1074 } 1075 1076 /* Create a cache for allocation of default size sgls */ 1077 len = sizeof(struct fnic_dflt_sgl_list); 1078 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1079 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1080 SLAB_HWCACHE_ALIGN, 1081 NULL); 1082 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1083 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1084 err = -ENOMEM; 1085 goto err_create_fnic_sgl_slab_dflt; 1086 } 1087 1088 /* Create a cache for allocation of max size sgls*/ 1089 len = sizeof(struct fnic_sgl_list); 1090 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1091 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1092 SLAB_HWCACHE_ALIGN, 1093 NULL); 1094 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1095 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1096 err = -ENOMEM; 1097 goto err_create_fnic_sgl_slab_max; 1098 } 1099 1100 /* Create a cache of io_req structs for use via mempool */ 1101 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1102 sizeof(struct fnic_io_req), 1103 0, SLAB_HWCACHE_ALIGN, NULL); 1104 if (!fnic_io_req_cache) { 1105 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1106 err = -ENOMEM; 1107 goto err_create_fnic_ioreq_slab; 1108 } 1109 1110 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1111 if (!fnic_event_queue) { 1112 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1113 err = -ENOMEM; 1114 goto err_create_fnic_workq; 1115 } 1116 1117 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1118 if (!fnic_fip_queue) { 1119 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1120 err = -ENOMEM; 1121 goto err_create_fip_workq; 1122 } 1123 1124 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1125 if (!fnic_fc_transport) { 1126 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1127 err = -ENOMEM; 1128 goto err_fc_transport; 1129 } 1130 1131 /* register the driver with PCI system */ 1132 err = pci_register_driver(&fnic_driver); 1133 if (err < 0) { 1134 printk(KERN_ERR PFX "pci register error\n"); 1135 goto err_pci_register; 1136 } 1137 return err; 1138 1139 err_pci_register: 1140 fc_release_transport(fnic_fc_transport); 1141 err_fc_transport: 1142 destroy_workqueue(fnic_fip_queue); 1143 err_create_fip_workq: 1144 destroy_workqueue(fnic_event_queue); 1145 err_create_fnic_workq: 1146 kmem_cache_destroy(fnic_io_req_cache); 1147 err_create_fnic_ioreq_slab: 1148 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1149 err_create_fnic_sgl_slab_max: 1150 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1151 err_create_fnic_sgl_slab_dflt: 1152 fnic_trace_free(); 1153 fnic_fc_trace_free(); 1154 fnic_debugfs_terminate(); 1155 return err; 1156 } 1157 1158 static void __exit fnic_cleanup_module(void) 1159 { 1160 pci_unregister_driver(&fnic_driver); 1161 destroy_workqueue(fnic_event_queue); 1162 if (fnic_fip_queue) 1163 destroy_workqueue(fnic_fip_queue); 1164 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1165 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1166 kmem_cache_destroy(fnic_io_req_cache); 1167 fc_release_transport(fnic_fc_transport); 1168 fnic_trace_free(); 1169 fnic_fc_trace_free(); 1170 fnic_debugfs_terminate(); 1171 } 1172 1173 module_init(fnic_init_module); 1174 module_exit(fnic_cleanup_module); 1175