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 = pci_set_dma_mask(pdev, DMA_BIT_MASK(64)); 615 if (err) { 616 err = pci_set_dma_mask(pdev, 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 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(32)); 624 if (err) { 625 shost_printk(KERN_ERR, fnic->lport->host, 626 "Unable to obtain 32-bit DMA " 627 "for consistent allocations, aborting.\n"); 628 goto err_out_release_regions; 629 } 630 } else { 631 err = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(64)); 632 if (err) { 633 shost_printk(KERN_ERR, fnic->lport->host, 634 "Unable to obtain 64-bit DMA " 635 "for consistent allocations, aborting.\n"); 636 goto err_out_release_regions; 637 } 638 } 639 640 /* Map vNIC resources from BAR0 */ 641 if (!(pci_resource_flags(pdev, 0) & IORESOURCE_MEM)) { 642 shost_printk(KERN_ERR, fnic->lport->host, 643 "BAR0 not memory-map'able, aborting.\n"); 644 err = -ENODEV; 645 goto err_out_release_regions; 646 } 647 648 fnic->bar0.vaddr = pci_iomap(pdev, 0, 0); 649 fnic->bar0.bus_addr = pci_resource_start(pdev, 0); 650 fnic->bar0.len = pci_resource_len(pdev, 0); 651 652 if (!fnic->bar0.vaddr) { 653 shost_printk(KERN_ERR, fnic->lport->host, 654 "Cannot memory-map BAR0 res hdr, " 655 "aborting.\n"); 656 err = -ENODEV; 657 goto err_out_release_regions; 658 } 659 660 fnic->vdev = vnic_dev_register(NULL, fnic, pdev, &fnic->bar0); 661 if (!fnic->vdev) { 662 shost_printk(KERN_ERR, fnic->lport->host, 663 "vNIC registration failed, " 664 "aborting.\n"); 665 err = -ENODEV; 666 goto err_out_iounmap; 667 } 668 669 err = fnic_dev_wait(fnic->vdev, vnic_dev_open, 670 vnic_dev_open_done, 0); 671 if (err) { 672 shost_printk(KERN_ERR, fnic->lport->host, 673 "vNIC dev open failed, aborting.\n"); 674 goto err_out_vnic_unregister; 675 } 676 677 err = vnic_dev_init(fnic->vdev, 0); 678 if (err) { 679 shost_printk(KERN_ERR, fnic->lport->host, 680 "vNIC dev init failed, aborting.\n"); 681 goto err_out_dev_close; 682 } 683 684 err = vnic_dev_mac_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 685 if (err) { 686 shost_printk(KERN_ERR, fnic->lport->host, 687 "vNIC get MAC addr failed \n"); 688 goto err_out_dev_close; 689 } 690 /* set data_src for point-to-point mode and to keep it non-zero */ 691 memcpy(fnic->data_src_addr, fnic->ctlr.ctl_src_addr, ETH_ALEN); 692 693 /* Get vNIC configuration */ 694 err = fnic_get_vnic_config(fnic); 695 if (err) { 696 shost_printk(KERN_ERR, fnic->lport->host, 697 "Get vNIC configuration failed, " 698 "aborting.\n"); 699 goto err_out_dev_close; 700 } 701 702 /* Configure Maximum Outstanding IO reqs*/ 703 if (fnic->config.io_throttle_count != FNIC_UCSM_DFLT_THROTTLE_CNT_BLD) { 704 host->can_queue = min_t(u32, FNIC_MAX_IO_REQ, 705 max_t(u32, FNIC_MIN_IO_REQ, 706 fnic->config.io_throttle_count)); 707 } 708 fnic->fnic_max_tag_id = host->can_queue; 709 710 host->max_lun = fnic->config.luns_per_tgt; 711 host->max_id = FNIC_MAX_FCP_TARGET; 712 host->max_cmd_len = FCOE_MAX_CMD_LEN; 713 714 fnic_get_res_counts(fnic); 715 716 err = fnic_set_intr_mode(fnic); 717 if (err) { 718 shost_printk(KERN_ERR, fnic->lport->host, 719 "Failed to set intr mode, " 720 "aborting.\n"); 721 goto err_out_dev_close; 722 } 723 724 err = fnic_alloc_vnic_resources(fnic); 725 if (err) { 726 shost_printk(KERN_ERR, fnic->lport->host, 727 "Failed to alloc vNIC resources, " 728 "aborting.\n"); 729 goto err_out_clear_intr; 730 } 731 732 733 /* initialize all fnic locks */ 734 spin_lock_init(&fnic->fnic_lock); 735 736 for (i = 0; i < FNIC_WQ_MAX; i++) 737 spin_lock_init(&fnic->wq_lock[i]); 738 739 for (i = 0; i < FNIC_WQ_COPY_MAX; i++) { 740 spin_lock_init(&fnic->wq_copy_lock[i]); 741 fnic->wq_copy_desc_low[i] = DESC_CLEAN_LOW_WATERMARK; 742 fnic->fw_ack_recd[i] = 0; 743 fnic->fw_ack_index[i] = -1; 744 } 745 746 for (i = 0; i < FNIC_IO_LOCKS; i++) 747 spin_lock_init(&fnic->io_req_lock[i]); 748 749 fnic->io_req_pool = mempool_create_slab_pool(2, fnic_io_req_cache); 750 if (!fnic->io_req_pool) 751 goto err_out_free_resources; 752 753 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 754 if (!pool) 755 goto err_out_free_ioreq_pool; 756 fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT] = pool; 757 758 pool = mempool_create_slab_pool(2, fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 759 if (!pool) 760 goto err_out_free_dflt_pool; 761 fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX] = pool; 762 763 /* setup vlan config, hw inserts vlan header */ 764 fnic->vlan_hw_insert = 1; 765 fnic->vlan_id = 0; 766 767 /* Initialize the FIP fcoe_ctrl struct */ 768 fnic->ctlr.send = fnic_eth_send; 769 fnic->ctlr.update_mac = fnic_update_mac; 770 fnic->ctlr.get_src_addr = fnic_get_mac; 771 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 772 shost_printk(KERN_INFO, fnic->lport->host, 773 "firmware supports FIP\n"); 774 /* enable directed and multicast */ 775 vnic_dev_packet_filter(fnic->vdev, 1, 1, 0, 0, 0); 776 vnic_dev_add_addr(fnic->vdev, FIP_ALL_ENODE_MACS); 777 vnic_dev_add_addr(fnic->vdev, fnic->ctlr.ctl_src_addr); 778 fnic->set_vlan = fnic_set_vlan; 779 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_AUTO); 780 timer_setup(&fnic->fip_timer, fnic_fip_notify_timer, 0); 781 spin_lock_init(&fnic->vlans_lock); 782 INIT_WORK(&fnic->fip_frame_work, fnic_handle_fip_frame); 783 INIT_WORK(&fnic->event_work, fnic_handle_event); 784 skb_queue_head_init(&fnic->fip_frame_queue); 785 INIT_LIST_HEAD(&fnic->evlist); 786 INIT_LIST_HEAD(&fnic->vlans); 787 } else { 788 shost_printk(KERN_INFO, fnic->lport->host, 789 "firmware uses non-FIP mode\n"); 790 fcoe_ctlr_init(&fnic->ctlr, FIP_MODE_NON_FIP); 791 fnic->ctlr.state = FIP_ST_NON_FIP; 792 } 793 fnic->state = FNIC_IN_FC_MODE; 794 795 atomic_set(&fnic->in_flight, 0); 796 fnic->state_flags = FNIC_FLAGS_NONE; 797 798 /* Enable hardware stripping of vlan header on ingress */ 799 fnic_set_nic_config(fnic, 0, 0, 0, 0, 0, 0, 1); 800 801 /* Setup notification buffer area */ 802 err = fnic_notify_set(fnic); 803 if (err) { 804 shost_printk(KERN_ERR, fnic->lport->host, 805 "Failed to alloc notify buffer, aborting.\n"); 806 goto err_out_free_max_pool; 807 } 808 809 /* Setup notify timer when using MSI interrupts */ 810 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 811 timer_setup(&fnic->notify_timer, fnic_notify_timer, 0); 812 813 /* allocate RQ buffers and post them to RQ*/ 814 for (i = 0; i < fnic->rq_count; i++) { 815 err = vnic_rq_fill(&fnic->rq[i], fnic_alloc_rq_frame); 816 if (err) { 817 shost_printk(KERN_ERR, fnic->lport->host, 818 "fnic_alloc_rq_frame can't alloc " 819 "frame\n"); 820 goto err_out_free_rq_buf; 821 } 822 } 823 824 /* 825 * Initialization done with PCI system, hardware, firmware. 826 * Add host to SCSI 827 */ 828 err = scsi_add_host(lp->host, &pdev->dev); 829 if (err) { 830 shost_printk(KERN_ERR, fnic->lport->host, 831 "fnic: scsi_add_host failed...exiting\n"); 832 goto err_out_free_rq_buf; 833 } 834 835 /* Start local port initiatialization */ 836 837 lp->link_up = 0; 838 839 lp->max_retry_count = fnic->config.flogi_retries; 840 lp->max_rport_retry_count = fnic->config.plogi_retries; 841 lp->service_params = (FCP_SPPF_INIT_FCN | FCP_SPPF_RD_XRDY_DIS | 842 FCP_SPPF_CONF_COMPL); 843 if (fnic->config.flags & VFCF_FCP_SEQ_LVL_ERR) 844 lp->service_params |= FCP_SPPF_RETRY; 845 846 lp->boot_time = jiffies; 847 lp->e_d_tov = fnic->config.ed_tov; 848 lp->r_a_tov = fnic->config.ra_tov; 849 lp->link_supported_speeds = FC_PORTSPEED_10GBIT; 850 fc_set_wwnn(lp, fnic->config.node_wwn); 851 fc_set_wwpn(lp, fnic->config.port_wwn); 852 853 fcoe_libfc_config(lp, &fnic->ctlr, &fnic_transport_template, 0); 854 855 if (!fc_exch_mgr_alloc(lp, FC_CLASS_3, FCPIO_HOST_EXCH_RANGE_START, 856 FCPIO_HOST_EXCH_RANGE_END, NULL)) { 857 err = -ENOMEM; 858 goto err_out_remove_scsi_host; 859 } 860 861 fc_lport_init_stats(lp); 862 fnic->stats_reset_time = jiffies; 863 864 fc_lport_config(lp); 865 866 if (fc_set_mfs(lp, fnic->config.maxdatafieldsize + 867 sizeof(struct fc_frame_header))) { 868 err = -EINVAL; 869 goto err_out_free_exch_mgr; 870 } 871 fc_host_maxframe_size(lp->host) = lp->mfs; 872 fc_host_dev_loss_tmo(lp->host) = fnic->config.port_down_timeout / 1000; 873 874 sprintf(fc_host_symbolic_name(lp->host), 875 DRV_NAME " v" DRV_VERSION " over %s", fnic->name); 876 877 spin_lock_irqsave(&fnic_list_lock, flags); 878 list_add_tail(&fnic->list, &fnic_list); 879 spin_unlock_irqrestore(&fnic_list_lock, flags); 880 881 INIT_WORK(&fnic->link_work, fnic_handle_link); 882 INIT_WORK(&fnic->frame_work, fnic_handle_frame); 883 skb_queue_head_init(&fnic->frame_queue); 884 skb_queue_head_init(&fnic->tx_queue); 885 886 /* Enable all queues */ 887 for (i = 0; i < fnic->raw_wq_count; i++) 888 vnic_wq_enable(&fnic->wq[i]); 889 for (i = 0; i < fnic->rq_count; i++) 890 vnic_rq_enable(&fnic->rq[i]); 891 for (i = 0; i < fnic->wq_copy_count; i++) 892 vnic_wq_copy_enable(&fnic->wq_copy[i]); 893 894 fc_fabric_login(lp); 895 896 vnic_dev_enable(fnic->vdev); 897 898 err = fnic_request_intr(fnic); 899 if (err) { 900 shost_printk(KERN_ERR, fnic->lport->host, 901 "Unable to request irq.\n"); 902 goto err_out_free_exch_mgr; 903 } 904 905 for (i = 0; i < fnic->intr_count; i++) 906 vnic_intr_unmask(&fnic->intr[i]); 907 908 fnic_notify_timer_start(fnic); 909 910 return 0; 911 912 err_out_free_exch_mgr: 913 fc_exch_mgr_free(lp); 914 err_out_remove_scsi_host: 915 fc_remove_host(lp->host); 916 scsi_remove_host(lp->host); 917 err_out_free_rq_buf: 918 for (i = 0; i < fnic->rq_count; i++) 919 vnic_rq_clean(&fnic->rq[i], fnic_free_rq_buf); 920 vnic_dev_notify_unset(fnic->vdev); 921 err_out_free_max_pool: 922 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_MAX]); 923 err_out_free_dflt_pool: 924 mempool_destroy(fnic->io_sgl_pool[FNIC_SGL_CACHE_DFLT]); 925 err_out_free_ioreq_pool: 926 mempool_destroy(fnic->io_req_pool); 927 err_out_free_resources: 928 fnic_free_vnic_resources(fnic); 929 err_out_clear_intr: 930 fnic_clear_intr_mode(fnic); 931 err_out_dev_close: 932 vnic_dev_close(fnic->vdev); 933 err_out_vnic_unregister: 934 vnic_dev_unregister(fnic->vdev); 935 err_out_iounmap: 936 fnic_iounmap(fnic); 937 err_out_release_regions: 938 pci_release_regions(pdev); 939 err_out_disable_device: 940 pci_disable_device(pdev); 941 err_out_free_hba: 942 fnic_stats_debugfs_remove(fnic); 943 scsi_host_put(lp->host); 944 err_out: 945 return err; 946 } 947 948 static void fnic_remove(struct pci_dev *pdev) 949 { 950 struct fnic *fnic = pci_get_drvdata(pdev); 951 struct fc_lport *lp = fnic->lport; 952 unsigned long flags; 953 954 /* 955 * Mark state so that the workqueue thread stops forwarding 956 * received frames and link events to the local port. ISR and 957 * other threads that can queue work items will also stop 958 * creating work items on the fnic workqueue 959 */ 960 spin_lock_irqsave(&fnic->fnic_lock, flags); 961 fnic->stop_rx_link_events = 1; 962 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 963 964 if (vnic_dev_get_intr_mode(fnic->vdev) == VNIC_DEV_INTR_MODE_MSI) 965 del_timer_sync(&fnic->notify_timer); 966 967 /* 968 * Flush the fnic event queue. After this call, there should 969 * be no event queued for this fnic device in the workqueue 970 */ 971 flush_workqueue(fnic_event_queue); 972 skb_queue_purge(&fnic->frame_queue); 973 skb_queue_purge(&fnic->tx_queue); 974 975 if (fnic->config.flags & VFCF_FIP_CAPABLE) { 976 del_timer_sync(&fnic->fip_timer); 977 skb_queue_purge(&fnic->fip_frame_queue); 978 fnic_fcoe_reset_vlans(fnic); 979 fnic_fcoe_evlist_free(fnic); 980 } 981 982 /* 983 * Log off the fabric. This stops all remote ports, dns port, 984 * logs off the fabric. This flushes all rport, disc, lport work 985 * before returning 986 */ 987 fc_fabric_logoff(fnic->lport); 988 989 spin_lock_irqsave(&fnic->fnic_lock, flags); 990 fnic->in_remove = 1; 991 spin_unlock_irqrestore(&fnic->fnic_lock, flags); 992 993 fcoe_ctlr_destroy(&fnic->ctlr); 994 fc_lport_destroy(lp); 995 fnic_stats_debugfs_remove(fnic); 996 997 /* 998 * This stops the fnic device, masks all interrupts. Completed 999 * CQ entries are drained. Posted WQ/RQ/Copy-WQ entries are 1000 * cleaned up 1001 */ 1002 fnic_cleanup(fnic); 1003 1004 BUG_ON(!skb_queue_empty(&fnic->frame_queue)); 1005 BUG_ON(!skb_queue_empty(&fnic->tx_queue)); 1006 1007 spin_lock_irqsave(&fnic_list_lock, flags); 1008 list_del(&fnic->list); 1009 spin_unlock_irqrestore(&fnic_list_lock, flags); 1010 1011 fc_remove_host(fnic->lport->host); 1012 scsi_remove_host(fnic->lport->host); 1013 fc_exch_mgr_free(fnic->lport); 1014 vnic_dev_notify_unset(fnic->vdev); 1015 fnic_free_intr(fnic); 1016 fnic_free_vnic_resources(fnic); 1017 fnic_clear_intr_mode(fnic); 1018 vnic_dev_close(fnic->vdev); 1019 vnic_dev_unregister(fnic->vdev); 1020 fnic_iounmap(fnic); 1021 pci_release_regions(pdev); 1022 pci_disable_device(pdev); 1023 scsi_host_put(lp->host); 1024 } 1025 1026 static struct pci_driver fnic_driver = { 1027 .name = DRV_NAME, 1028 .id_table = fnic_id_table, 1029 .probe = fnic_probe, 1030 .remove = fnic_remove, 1031 }; 1032 1033 static int __init fnic_init_module(void) 1034 { 1035 size_t len; 1036 int err = 0; 1037 1038 printk(KERN_INFO PFX "%s, ver %s\n", DRV_DESCRIPTION, DRV_VERSION); 1039 1040 /* Create debugfs entries for fnic */ 1041 err = fnic_debugfs_init(); 1042 if (err < 0) { 1043 printk(KERN_ERR PFX "Failed to create fnic directory " 1044 "for tracing and stats logging\n"); 1045 fnic_debugfs_terminate(); 1046 } 1047 1048 /* Allocate memory for trace buffer */ 1049 err = fnic_trace_buf_init(); 1050 if (err < 0) { 1051 printk(KERN_ERR PFX 1052 "Trace buffer initialization Failed. " 1053 "Fnic Tracing utility is disabled\n"); 1054 fnic_trace_free(); 1055 } 1056 1057 /* Allocate memory for fc trace buffer */ 1058 err = fnic_fc_trace_init(); 1059 if (err < 0) { 1060 printk(KERN_ERR PFX "FC trace buffer initialization Failed " 1061 "FC frame tracing utility is disabled\n"); 1062 fnic_fc_trace_free(); 1063 } 1064 1065 /* Create a cache for allocation of default size sgls */ 1066 len = sizeof(struct fnic_dflt_sgl_list); 1067 fnic_sgl_cache[FNIC_SGL_CACHE_DFLT] = kmem_cache_create 1068 ("fnic_sgl_dflt", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1069 SLAB_HWCACHE_ALIGN, 1070 NULL); 1071 if (!fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]) { 1072 printk(KERN_ERR PFX "failed to create fnic dflt sgl slab\n"); 1073 err = -ENOMEM; 1074 goto err_create_fnic_sgl_slab_dflt; 1075 } 1076 1077 /* Create a cache for allocation of max size sgls*/ 1078 len = sizeof(struct fnic_sgl_list); 1079 fnic_sgl_cache[FNIC_SGL_CACHE_MAX] = kmem_cache_create 1080 ("fnic_sgl_max", len + FNIC_SG_DESC_ALIGN, FNIC_SG_DESC_ALIGN, 1081 SLAB_HWCACHE_ALIGN, 1082 NULL); 1083 if (!fnic_sgl_cache[FNIC_SGL_CACHE_MAX]) { 1084 printk(KERN_ERR PFX "failed to create fnic max sgl slab\n"); 1085 err = -ENOMEM; 1086 goto err_create_fnic_sgl_slab_max; 1087 } 1088 1089 /* Create a cache of io_req structs for use via mempool */ 1090 fnic_io_req_cache = kmem_cache_create("fnic_io_req", 1091 sizeof(struct fnic_io_req), 1092 0, SLAB_HWCACHE_ALIGN, NULL); 1093 if (!fnic_io_req_cache) { 1094 printk(KERN_ERR PFX "failed to create fnic io_req slab\n"); 1095 err = -ENOMEM; 1096 goto err_create_fnic_ioreq_slab; 1097 } 1098 1099 fnic_event_queue = create_singlethread_workqueue("fnic_event_wq"); 1100 if (!fnic_event_queue) { 1101 printk(KERN_ERR PFX "fnic work queue create failed\n"); 1102 err = -ENOMEM; 1103 goto err_create_fnic_workq; 1104 } 1105 1106 spin_lock_init(&fnic_list_lock); 1107 INIT_LIST_HEAD(&fnic_list); 1108 1109 fnic_fip_queue = create_singlethread_workqueue("fnic_fip_q"); 1110 if (!fnic_fip_queue) { 1111 printk(KERN_ERR PFX "fnic FIP work queue create failed\n"); 1112 err = -ENOMEM; 1113 goto err_create_fip_workq; 1114 } 1115 1116 fnic_fc_transport = fc_attach_transport(&fnic_fc_functions); 1117 if (!fnic_fc_transport) { 1118 printk(KERN_ERR PFX "fc_attach_transport error\n"); 1119 err = -ENOMEM; 1120 goto err_fc_transport; 1121 } 1122 1123 /* register the driver with PCI system */ 1124 err = pci_register_driver(&fnic_driver); 1125 if (err < 0) { 1126 printk(KERN_ERR PFX "pci register error\n"); 1127 goto err_pci_register; 1128 } 1129 return err; 1130 1131 err_pci_register: 1132 fc_release_transport(fnic_fc_transport); 1133 err_fc_transport: 1134 destroy_workqueue(fnic_fip_queue); 1135 err_create_fip_workq: 1136 destroy_workqueue(fnic_event_queue); 1137 err_create_fnic_workq: 1138 kmem_cache_destroy(fnic_io_req_cache); 1139 err_create_fnic_ioreq_slab: 1140 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1141 err_create_fnic_sgl_slab_max: 1142 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1143 err_create_fnic_sgl_slab_dflt: 1144 fnic_trace_free(); 1145 fnic_fc_trace_free(); 1146 fnic_debugfs_terminate(); 1147 return err; 1148 } 1149 1150 static void __exit fnic_cleanup_module(void) 1151 { 1152 pci_unregister_driver(&fnic_driver); 1153 destroy_workqueue(fnic_event_queue); 1154 if (fnic_fip_queue) { 1155 flush_workqueue(fnic_fip_queue); 1156 destroy_workqueue(fnic_fip_queue); 1157 } 1158 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_MAX]); 1159 kmem_cache_destroy(fnic_sgl_cache[FNIC_SGL_CACHE_DFLT]); 1160 kmem_cache_destroy(fnic_io_req_cache); 1161 fc_release_transport(fnic_fc_transport); 1162 fnic_trace_free(); 1163 fnic_fc_trace_free(); 1164 fnic_debugfs_terminate(); 1165 } 1166 1167 module_init(fnic_init_module); 1168 module_exit(fnic_cleanup_module); 1169 1170