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_attrs = fnic_attrs, 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 u16 old_vlan; 556 old_vlan = vnic_dev_set_default_vlan(fnic->vdev, vlan_id); 557 } 558 559 static int fnic_probe(struct pci_dev *pdev, const struct pci_device_id *ent) 560 { 561 struct Scsi_Host *host; 562 struct fc_lport *lp; 563 struct fnic *fnic; 564 mempool_t *pool; 565 int err; 566 int i; 567 unsigned long flags; 568 569 /* 570 * Allocate SCSI Host and set up association between host, 571 * local port, and fnic 572 */ 573 lp = libfc_host_alloc(&fnic_host_template, sizeof(struct fnic)); 574 if (!lp) { 575 printk(KERN_ERR PFX "Unable to alloc libfc local port\n"); 576 err = -ENOMEM; 577 goto err_out; 578 } 579 host = lp->host; 580 fnic = lport_priv(lp); 581 fnic->lport = lp; 582 fnic->ctlr.lp = lp; 583 584 snprintf(fnic->name, sizeof(fnic->name) - 1, "%s%d", DRV_NAME, 585 host->host_no); 586 587 host->transportt = fnic_fc_transport; 588 589 fnic_stats_debugfs_init(fnic); 590 591 /* Setup PCI resources */ 592 pci_set_drvdata(pdev, fnic); 593 594 fnic->pdev = pdev; 595 596 err = pci_enable_device(pdev); 597 if (err) { 598 shost_printk(KERN_ERR, fnic->lport->host, 599 "Cannot enable PCI device, aborting.\n"); 600 goto err_out_free_hba; 601 } 602 603 err = pci_request_regions(pdev, DRV_NAME); 604 if (err) { 605 shost_printk(KERN_ERR, fnic->lport->host, 606 "Cannot enable PCI resources, aborting\n"); 607 goto err_out_disable_device; 608 } 609 610 pci_set_master(pdev); 611 612 /* Query PCI controller on system for DMA addressing 613 * limitation for the device. Try 64-bit first, and 614 * fail to 32-bit. 615 */ 616 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64)); 617 if (err) { 618 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32)); 619 if (err) { 620 shost_printk(KERN_ERR, fnic->lport->host, 621 "No usable DMA configuration " 622 "aborting\n"); 623 goto err_out_release_regions; 624 } 625 } 626 627 /* Map vNIC resources from BAR0 */ 628 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 629 shost_printk(KERN_ERR, fnic->lport->host, 630 "BAR0 not memory-map'able, aborting.\n"); 631 err = -ENODEV; 632 goto err_out_release_regions; 633 } 634 635 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 636 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 637 fnic->bar0.len = pci_resource_len(pdev, 0); 638 639 if (!fnic->bar0.vaddr) { 640 shost_printk(KERN_ERR, fnic->lport->host, 641 "Cannot memory-map BAR0 res hdr, " 642 "aborting.\n"); 643 err = -ENODEV; 644 goto err_out_release_regions; 645 } 646 647 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 648 if (!fnic->vdev) { 649 shost_printk(KERN_ERR, fnic->lport->host, 650 "vNIC registration failed, " 651 "aborting.\n"); 652 err = -ENODEV; 653 goto err_out_iounmap; 654 } 655 656 err = vnic_dev_cmd_init(fnic->vdev); 657 if (err) { 658 shost_printk(KERN_ERR, fnic->lport->host, 659 "vnic_dev_cmd_init() returns %d, aborting\n", 660 err); 661 goto err_out_vnic_unregister; 662 } 663 664 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 665 vnic_dev_open_done, CMD_OPENF_RQ_ENABLE_THEN_POST); 666 if (err) { 667 shost_printk(KERN_ERR, fnic->lport->host, 668 "vNIC dev open failed, aborting.\n"); 669 goto err_out_dev_cmd_deinit; 670 } 671 672 err = vnic_dev_init(fnic->vdev, 0); 673 if (err) { 674 shost_printk(KERN_ERR, fnic->lport->host, 675 "vNIC dev init failed, aborting.\n"); 676 goto err_out_dev_close; 677 } 678 679 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 680 if (err) { 681 shost_printk(KERN_ERR, fnic->lport->host, 682 "vNIC get MAC addr failed \n"); 683 goto err_out_dev_close; 684 } 685 /* set data_src for point-to-point mode and to keep it non-zero */ 686 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 687 688 /* Get vNIC configuration */ 689 err = fnic_get_vnic_config(fnic); 690 if (err) { 691 shost_printk(KERN_ERR, fnic->lport->host, 692 "Get vNIC configuration failed, " 693 "aborting.\n"); 694 goto err_out_dev_close; 695 } 696 697 /* Configure Maximum Outstanding IO reqs*/ 698 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 699 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 700 max_t(u32, FNIC_MIN_IO_REQ, 701 fnic->config.io_throttle_count)); 702 } 703 fnic->fnic_max_tag_id = host->can_queue; 704 705 host->max_lun = fnic->config.luns_per_tgt; 706 host->max_id = FNIC_MAX_FCP_TARGET; 707 host->max_cmd_len = FCOE_MAX_CMD_LEN; 708 709 fnic_get_res_counts(fnic); 710 711 err = fnic_set_intr_mode(fnic); 712 if (err) { 713 shost_printk(KERN_ERR, fnic->lport->host, 714 "Failed to set intr mode, " 715 "aborting.\n"); 716 goto err_out_dev_close; 717 } 718 719 err = fnic_alloc_vnic_resources(fnic); 720 if (err) { 721 shost_printk(KERN_ERR, fnic->lport->host, 722 "Failed to alloc vNIC resources, " 723 "aborting.\n"); 724 goto err_out_clear_intr; 725 } 726 727 728 /* initialize all fnic locks */ 729 spin_lock_init(&fnic->fnic_lock); 730 731 for (i = 0; i < FNIC_WQ_MAX; i++) 732 spin_lock_init(&fnic->wq_lock[i]); 733 734 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 735 spin_lock_init(&fnic->wq_copy_lock[i]); 736 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 737 fnic->fw_ack_recd[i] = 0; 738 fnic->fw_ack_index[i] = -1; 739 } 740 741 for (i = 0; i < FNIC_IO_LOCKS; i++) 742 spin_lock_init(&fnic->io_req_lock[i]); 743 744 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 745 if (!fnic->io_req_pool) 746 goto err_out_free_resources; 747 748 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 749 if (!pool) 750 goto err_out_free_ioreq_pool; 751 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 752 753 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 754 if (!pool) 755 goto err_out_free_dflt_pool; 756 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 757 758 /* setup vlan config, hw inserts vlan header */ 759 fnic->vlan_hw_insert = 1; 760 fnic->vlan_id = 0; 761 762 /* Initialize the FIP fcoe_ctrl struct */ 763 fnic->ctlr.send = fnic_eth_send; 764 fnic->ctlr.update_mac = fnic_update_mac; 765 fnic->ctlr.get_src_addr = fnic_get_mac; 766 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 767 shost_printk(KERN_INFO, fnic->lport->host, 768 "firmware supports FIP\n"); 769 /* enable directed and multicast */ 770 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 771 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 772 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 773 fnic->set_vlan = fnic_set_vlan; 774 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 775 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0); 776 spin_lock_init(&fnic->vlans_lock); 777 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 778 INIT_WORK(&fnic->event_work, fnic_handle_event); 779 skb_queue_head_init(&fnic->fip_frame_queue); 780 INIT_LIST_HEAD(&fnic->evlist); 781 INIT_LIST_HEAD(&fnic->vlans); 782 } else { 783 shost_printk(KERN_INFO, fnic->lport->host, 784 "firmware uses non-FIP mode\n"); 785 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 786 fnic->ctlr.state = FIP_ST_NON_FIP; 787 } 788 fnic->state = FNIC_IN_FC_MODE; 789 790 atomic_set(&fnic->in_flight, 0); 791 fnic->state_flags = FNIC_FLAGS_NONE; 792 793 /* Enable hardware stripping of vlan header on ingress */ 794 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 795 796 /* Setup notification buffer area */ 797 err = fnic_notify_set(fnic); 798 if (err) { 799 shost_printk(KERN_ERR, fnic->lport->host, 800 "Failed to alloc notify buffer, aborting.\n"); 801 goto err_out_free_max_pool; 802 } 803 804 /* Setup notify timer when using MSI interrupts */ 805 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 806 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0); 807 808 /* allocate RQ buffers and post them to RQ*/ 809 for (i = 0; i < fnic->rq_count; i++) { 810 vnic_rq_enable(&fnic->rq[i]); 811 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 812 if (err) { 813 shost_printk(KERN_ERR, fnic->lport->host, 814 "fnic_alloc_rq_frame can't alloc " 815 "frame\n"); 816 goto err_out_free_rq_buf; 817 } 818 } 819 820 /* 821 * Initialization done with PCI system, hardware, firmware. 822 * Add host to SCSI 823 */ 824 err = scsi_add_host(lp->host, &pdev->dev); 825 if (err) { 826 shost_printk(KERN_ERR, fnic->lport->host, 827 "fnic: scsi_add_host failed...exiting\n"); 828 goto err_out_free_rq_buf; 829 } 830 831 /* Start local port initiatialization */ 832 833 lp->link_up = 0; 834 835 lp->max_retry_count = fnic->config.flogi_retries; 836 lp->max_rport_retry_count = fnic->config.plogi_retries; 837 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 838 FCP_SPPF_CONF_COMPL); 839 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 840 lp->service_params |= FCP_SPPF_RETRY; 841 842 lp->boot_time = jiffies; 843 lp->e_d_tov = fnic->config.ed_tov; 844 lp->r_a_tov = fnic->config.ra_tov; 845 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 846 fc_set_wwnn(lp, fnic->config.node_wwn); 847 fc_set_wwpn(lp, fnic->config.port_wwn); 848 849 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 850 851 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 852 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 853 err = -ENOMEM; 854 goto err_out_remove_scsi_host; 855 } 856 857 fc_lport_init_stats(lp); 858 fnic->stats_reset_time = jiffies; 859 860 fc_lport_config(lp); 861 862 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 863 sizeof(struct fc_frame_header))) { 864 err = -EINVAL; 865 goto err_out_free_exch_mgr; 866 } 867 fc_host_maxframe_size(lp->host) = lp->mfs; 868 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 869 870 sprintf(fc_host_symbolic_name(lp->host), 871 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 872 873 spin_lock_irqsave(&fnic_list_lock, flags); 874 list_add_tail(&fnic->list, &fnic_list); 875 spin_unlock_irqrestore(&fnic_list_lock, flags); 876 877 INIT_WORK(&fnic->link_work, fnic_handle_link); 878 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 879 skb_queue_head_init(&fnic->frame_queue); 880 skb_queue_head_init(&fnic->tx_queue); 881 882 /* Enable all queues */ 883 for (i = 0; i < fnic->raw_wq_count; i++) 884 vnic_wq_enable(&fnic->wq[i]); 885 for (i = 0; i < fnic->wq_copy_count; i++) 886 vnic_wq_copy_enable(&fnic->wq_copy[i]); 887 888 fc_fabric_login(lp); 889 890 err = fnic_request_intr(fnic); 891 if (err) { 892 shost_printk(KERN_ERR, fnic->lport->host, 893 "Unable to request irq.\n"); 894 goto err_out_free_exch_mgr; 895 } 896 897 vnic_dev_enable(fnic->vdev); 898 899 for (i = 0; i < fnic->intr_count; i++) 900 vnic_intr_unmask(&fnic->intr[i]); 901 902 fnic_notify_timer_start(fnic); 903 904 return 0; 905 906 err_out_free_exch_mgr: 907 fc_exch_mgr_free(lp); 908 err_out_remove_scsi_host: 909 fc_remove_host(lp->host); 910 scsi_remove_host(lp->host); 911 err_out_free_rq_buf: 912 for (i = 0; i < fnic->rq_count; i++) 913 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 914 vnic_dev_notify_unset(fnic->vdev); 915 err_out_free_max_pool: 916 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 917 err_out_free_dflt_pool: 918 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 919 err_out_free_ioreq_pool: 920 mempool_destroy(fnic->io_req_pool); 921 err_out_free_resources: 922 fnic_free_vnic_resources(fnic); 923 err_out_clear_intr: 924 fnic_clear_intr_mode(fnic); 925 err_out_dev_close: 926 vnic_dev_close(fnic->vdev); 927 err_out_dev_cmd_deinit: 928 err_out_vnic_unregister: 929 vnic_dev_unregister(fnic->vdev); 930 err_out_iounmap: 931 fnic_iounmap(fnic); 932 err_out_release_regions: 933 pci_release_regions(pdev); 934 err_out_disable_device: 935 pci_disable_device(pdev); 936 err_out_free_hba: 937 fnic_stats_debugfs_remove(fnic); 938 scsi_host_put(lp->host); 939 err_out: 940 return err; 941 } 942 943 static void fnic_remove(struct pci_dev *pdev) 944 { 945 struct fnic *fnic = pci_get_drvdata(pdev); 946 struct fc_lport *lp = fnic->lport; 947 unsigned long flags; 948 949 /* 950 * Mark state so that the workqueue thread stops forwarding 951 * received frames and link events to the local port. ISR and 952 * other threads that can queue work items will also stop 953 * creating work items on the fnic workqueue 954 */ 955 spin_lock_irqsave(&fnic->fnic_lock, flags); 956 fnic->stop_rx_link_events = 1; 957 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 958 959 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 960 del_timer_sync(&fnic->notify_timer); 961 962 /* 963 * Flush the fnic event queue. After this call, there should 964 * be no event queued for this fnic device in the workqueue 965 */ 966 flush_workqueue(fnic_event_queue); 967 skb_queue_purge(&fnic->frame_queue); 968 skb_queue_purge(&fnic->tx_queue); 969 970 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 971 del_timer_sync(&fnic->fip_timer); 972 skb_queue_purge(&fnic->fip_frame_queue); 973 fnic_fcoe_reset_vlans(fnic); 974 fnic_fcoe_evlist_free(fnic); 975 } 976 977 /* 978 * Log off the fabric. This stops all remote ports, dns port, 979 * logs off the fabric. This flushes all rport, disc, lport work 980 * before returning 981 */ 982 fc_fabric_logoff(fnic->lport); 983 984 spin_lock_irqsave(&fnic->fnic_lock, flags); 985 fnic->in_remove = 1; 986 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 987 988 fcoe_ctlr_destroy(&fnic->ctlr); 989 fc_lport_destroy(lp); 990 fnic_stats_debugfs_remove(fnic); 991 992 /* 993 * This stops the fnic device, masks all interrupts. Completed 994 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 995 * cleaned up 996 */ 997 fnic_cleanup(fnic); 998 999 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 1000 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 1001 1002 spin_lock_irqsave(&fnic_list_lock, flags); 1003 list_del(&fnic->list); 1004 spin_unlock_irqrestore(&fnic_list_lock, flags); 1005 1006 fc_remove_host(fnic->lport->host); 1007 scsi_remove_host(fnic->lport->host); 1008 fc_exch_mgr_free(fnic->lport); 1009 vnic_dev_notify_unset(fnic->vdev); 1010 fnic_free_intr(fnic); 1011 fnic_free_vnic_resources(fnic); 1012 fnic_clear_intr_mode(fnic); 1013 vnic_dev_close(fnic->vdev); 1014 vnic_dev_unregister(fnic->vdev); 1015 fnic_iounmap(fnic); 1016 pci_release_regions(pdev); 1017 pci_disable_device(pdev); 1018 scsi_host_put(lp->host); 1019 } 1020 1021 static struct pci_driver fnic_driver = { 1022 .name = DRV_NAME, 1023 .id_table = fnic_id_table, 1024 .probe = fnic_probe, 1025 .remove = fnic_remove, 1026 }; 1027 1028 static int __init fnic_init_module(void) 1029 { 1030 size_t len; 1031 int err = 0; 1032 1033 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1034 1035 /* Create debugfs entries for fnic */ 1036 err = fnic_debugfs_init(); 1037 if (err < 0) { 1038 printk(KERN_ERR PFX "Failed to create fnic directory " 1039 "for tracing and stats logging\n"); 1040 fnic_debugfs_terminate(); 1041 } 1042 1043 /* Allocate memory for trace buffer */ 1044 err = fnic_trace_buf_init(); 1045 if (err < 0) { 1046 printk(KERN_ERR PFX 1047 "Trace buffer initialization Failed. " 1048 "Fnic Tracing utility is disabled\n"); 1049 fnic_trace_free(); 1050 } 1051 1052 /* Allocate memory for fc trace buffer */ 1053 err = fnic_fc_trace_init(); 1054 if (err < 0) { 1055 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1056 "FC frame tracing utility is disabled\n"); 1057 fnic_fc_trace_free(); 1058 } 1059 1060 /* Create a cache for allocation of default size sgls */ 1061 len = sizeof(struct fnic_dflt_sgl_list); 1062 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1063 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1064 SLAB_HWCACHE_ALIGN, 1065 NULL); 1066 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1067 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1068 err = -ENOMEM; 1069 goto err_create_fnic_sgl_slab_dflt; 1070 } 1071 1072 /* Create a cache for allocation of max size sgls*/ 1073 len = sizeof(struct fnic_sgl_list); 1074 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1075 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1076 SLAB_HWCACHE_ALIGN, 1077 NULL); 1078 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1079 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1080 err = -ENOMEM; 1081 goto err_create_fnic_sgl_slab_max; 1082 } 1083 1084 /* Create a cache of io_req structs for use via mempool */ 1085 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1086 sizeof(struct fnic_io_req), 1087 0, SLAB_HWCACHE_ALIGN, NULL); 1088 if (!fnic_io_req_cache) { 1089 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1090 err = -ENOMEM; 1091 goto err_create_fnic_ioreq_slab; 1092 } 1093 1094 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1095 if (!fnic_event_queue) { 1096 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1097 err = -ENOMEM; 1098 goto err_create_fnic_workq; 1099 } 1100 1101 spin_lock_init(&fnic_list_lock); 1102 INIT_LIST_HEAD(&fnic_list); 1103 1104 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1105 if (!fnic_fip_queue) { 1106 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1107 err = -ENOMEM; 1108 goto err_create_fip_workq; 1109 } 1110 1111 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1112 if (!fnic_fc_transport) { 1113 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1114 err = -ENOMEM; 1115 goto err_fc_transport; 1116 } 1117 1118 /* register the driver with PCI system */ 1119 err = pci_register_driver(&fnic_driver); 1120 if (err < 0) { 1121 printk(KERN_ERR PFX "pci register error\n"); 1122 goto err_pci_register; 1123 } 1124 return err; 1125 1126 err_pci_register: 1127 fc_release_transport(fnic_fc_transport); 1128 err_fc_transport: 1129 destroy_workqueue(fnic_fip_queue); 1130 err_create_fip_workq: 1131 destroy_workqueue(fnic_event_queue); 1132 err_create_fnic_workq: 1133 kmem_cache_destroy(fnic_io_req_cache); 1134 err_create_fnic_ioreq_slab: 1135 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1136 err_create_fnic_sgl_slab_max: 1137 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1138 err_create_fnic_sgl_slab_dflt: 1139 fnic_trace_free(); 1140 fnic_fc_trace_free(); 1141 fnic_debugfs_terminate(); 1142 return err; 1143 } 1144 1145 static void __exit fnic_cleanup_module(void) 1146 { 1147 pci_unregister_driver(&fnic_driver); 1148 destroy_workqueue(fnic_event_queue); 1149 if (fnic_fip_queue) { 1150 flush_workqueue(fnic_fip_queue); 1151 destroy_workqueue(fnic_fip_queue); 1152 } 1153 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1154 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1155 kmem_cache_destroy(fnic_io_req_cache); 1156 fc_release_transport(fnic_fc_transport); 1157 fnic_trace_free(); 1158 fnic_fc_trace_free(); 1159 fnic_debugfs_terminate(); 1160 } 1161 1162 module_init(fnic_init_module); 1163 module_exit(fnic_cleanup_module); 1164 1165