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