1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2010 QLogic Corporation 4 * 5 * See LICENSE.qla4xxx for copyright and licensing details. 6 */ 7 #include <linux/moduleparam.h> 8 #include <linux/slab.h> 9 10 #include <scsi/scsi_tcq.h> 11 #include <scsi/scsicam.h> 12 13 #include "ql4_def.h" 14 #include "ql4_version.h" 15 #include "ql4_glbl.h" 16 #include "ql4_dbg.h" 17 #include "ql4_inline.h" 18 19 /* 20 * Driver version 21 */ 22 static char qla4xxx_version_str[40]; 23 24 /* 25 * SRB allocation cache 26 */ 27 static struct kmem_cache *srb_cachep; 28 29 /* 30 * Module parameter information and variables 31 */ 32 int ql4xdontresethba = 0; 33 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR); 34 MODULE_PARM_DESC(ql4xdontresethba, 35 "Don't reset the HBA for driver recovery \n" 36 " 0 - It will reset HBA (Default)\n" 37 " 1 - It will NOT reset HBA"); 38 39 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */ 40 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR); 41 MODULE_PARM_DESC(ql4xextended_error_logging, 42 "Option to enable extended error logging, " 43 "Default is 0 - no logging, 1 - debug logging"); 44 45 int ql4xenablemsix = 1; 46 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR); 47 MODULE_PARM_DESC(ql4xenablemsix, 48 "Set to enable MSI or MSI-X interrupt mechanism.\n" 49 " 0 = enable INTx interrupt mechanism.\n" 50 " 1 = enable MSI-X interrupt mechanism (Default).\n" 51 " 2 = enable MSI interrupt mechanism."); 52 53 #define QL4_DEF_QDEPTH 32 54 static int ql4xmaxqdepth = QL4_DEF_QDEPTH; 55 module_param(ql4xmaxqdepth, int, S_IRUGO | S_IWUSR); 56 MODULE_PARM_DESC(ql4xmaxqdepth, 57 "Maximum queue depth to report for target devices.\n" 58 " Default: 32."); 59 60 static int ql4xsess_recovery_tmo = QL4_SESS_RECOVERY_TMO; 61 module_param(ql4xsess_recovery_tmo, int, S_IRUGO); 62 MODULE_PARM_DESC(ql4xsess_recovery_tmo, 63 "Target Session Recovery Timeout.\n" 64 " Default: 30 sec."); 65 66 /* 67 * SCSI host template entry points 68 */ 69 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); 70 71 /* 72 * iSCSI template entry points 73 */ 74 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 75 enum iscsi_tgt_dscvr type, uint32_t enable, 76 struct sockaddr *dst_addr); 77 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 78 enum iscsi_param param, char *buf); 79 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 80 enum iscsi_param param, char *buf); 81 static int qla4xxx_host_get_param(struct Scsi_Host *shost, 82 enum iscsi_host_param param, char *buf); 83 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); 84 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc); 85 86 /* 87 * SCSI host template entry points 88 */ 89 static int qla4xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd); 90 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd); 91 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); 92 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd); 93 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); 94 static int qla4xxx_slave_alloc(struct scsi_device *device); 95 static int qla4xxx_slave_configure(struct scsi_device *device); 96 static void qla4xxx_slave_destroy(struct scsi_device *sdev); 97 static void qla4xxx_scan_start(struct Scsi_Host *shost); 98 99 static struct qla4_8xxx_legacy_intr_set legacy_intr[] = 100 QLA82XX_LEGACY_INTR_CONFIG; 101 102 static struct scsi_host_template qla4xxx_driver_template = { 103 .module = THIS_MODULE, 104 .name = DRIVER_NAME, 105 .proc_name = DRIVER_NAME, 106 .queuecommand = qla4xxx_queuecommand, 107 108 .eh_abort_handler = qla4xxx_eh_abort, 109 .eh_device_reset_handler = qla4xxx_eh_device_reset, 110 .eh_target_reset_handler = qla4xxx_eh_target_reset, 111 .eh_host_reset_handler = qla4xxx_eh_host_reset, 112 .eh_timed_out = qla4xxx_eh_cmd_timed_out, 113 114 .slave_configure = qla4xxx_slave_configure, 115 .slave_alloc = qla4xxx_slave_alloc, 116 .slave_destroy = qla4xxx_slave_destroy, 117 118 .scan_finished = iscsi_scan_finished, 119 .scan_start = qla4xxx_scan_start, 120 121 .this_id = -1, 122 .cmd_per_lun = 3, 123 .use_clustering = ENABLE_CLUSTERING, 124 .sg_tablesize = SG_ALL, 125 126 .max_sectors = 0xFFFF, 127 .shost_attrs = qla4xxx_host_attrs, 128 }; 129 130 static struct iscsi_transport qla4xxx_iscsi_transport = { 131 .owner = THIS_MODULE, 132 .name = DRIVER_NAME, 133 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD | 134 CAP_DATA_PATH_OFFLOAD, 135 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | 136 ISCSI_TARGET_NAME | ISCSI_TPGT | 137 ISCSI_TARGET_ALIAS, 138 .host_param_mask = ISCSI_HOST_HWADDRESS | 139 ISCSI_HOST_IPADDRESS | 140 ISCSI_HOST_INITIATOR_NAME, 141 .tgt_dscvr = qla4xxx_tgt_dscvr, 142 .get_conn_param = qla4xxx_conn_get_param, 143 .get_session_param = qla4xxx_sess_get_param, 144 .get_host_param = qla4xxx_host_get_param, 145 .session_recovery_timedout = qla4xxx_recovery_timedout, 146 }; 147 148 static struct scsi_transport_template *qla4xxx_scsi_transport; 149 150 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc) 151 { 152 struct iscsi_cls_session *session; 153 struct ddb_entry *ddb_entry; 154 155 session = starget_to_session(scsi_target(sc->device)); 156 ddb_entry = session->dd_data; 157 158 /* if we are not logged in then the LLD is going to clean up the cmd */ 159 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) 160 return BLK_EH_RESET_TIMER; 161 else 162 return BLK_EH_NOT_HANDLED; 163 } 164 165 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) 166 { 167 struct ddb_entry *ddb_entry = session->dd_data; 168 struct scsi_qla_host *ha = ddb_entry->ha; 169 170 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 171 atomic_set(&ddb_entry->state, DDB_STATE_DEAD); 172 173 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout " 174 "of (%d) secs exhausted, marking device DEAD.\n", 175 ha->host_no, __func__, ddb_entry->fw_ddb_index, 176 ddb_entry->sess->recovery_tmo)); 177 } 178 } 179 180 static int qla4xxx_host_get_param(struct Scsi_Host *shost, 181 enum iscsi_host_param param, char *buf) 182 { 183 struct scsi_qla_host *ha = to_qla_host(shost); 184 int len; 185 186 switch (param) { 187 case ISCSI_HOST_PARAM_HWADDRESS: 188 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN); 189 break; 190 case ISCSI_HOST_PARAM_IPADDRESS: 191 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0], 192 ha->ip_address[1], ha->ip_address[2], 193 ha->ip_address[3]); 194 break; 195 case ISCSI_HOST_PARAM_INITIATOR_NAME: 196 len = sprintf(buf, "%s\n", ha->name_string); 197 break; 198 default: 199 return -ENOSYS; 200 } 201 202 return len; 203 } 204 205 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 206 enum iscsi_param param, char *buf) 207 { 208 struct ddb_entry *ddb_entry = sess->dd_data; 209 int len; 210 211 switch (param) { 212 case ISCSI_PARAM_TARGET_NAME: 213 len = snprintf(buf, PAGE_SIZE - 1, "%s\n", 214 ddb_entry->iscsi_name); 215 break; 216 case ISCSI_PARAM_TPGT: 217 len = sprintf(buf, "%u\n", ddb_entry->tpgt); 218 break; 219 case ISCSI_PARAM_TARGET_ALIAS: 220 len = snprintf(buf, PAGE_SIZE - 1, "%s\n", 221 ddb_entry->iscsi_alias); 222 break; 223 default: 224 return -ENOSYS; 225 } 226 227 return len; 228 } 229 230 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 231 enum iscsi_param param, char *buf) 232 { 233 struct iscsi_cls_session *session; 234 struct ddb_entry *ddb_entry; 235 int len; 236 237 session = iscsi_dev_to_session(conn->dev.parent); 238 ddb_entry = session->dd_data; 239 240 switch (param) { 241 case ISCSI_PARAM_CONN_PORT: 242 len = sprintf(buf, "%hu\n", ddb_entry->port); 243 break; 244 case ISCSI_PARAM_CONN_ADDRESS: 245 /* TODO: what are the ipv6 bits */ 246 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr); 247 break; 248 default: 249 return -ENOSYS; 250 } 251 252 return len; 253 } 254 255 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 256 enum iscsi_tgt_dscvr type, uint32_t enable, 257 struct sockaddr *dst_addr) 258 { 259 struct scsi_qla_host *ha; 260 struct sockaddr_in *addr; 261 struct sockaddr_in6 *addr6; 262 int ret = 0; 263 264 ha = (struct scsi_qla_host *) shost->hostdata; 265 266 switch (type) { 267 case ISCSI_TGT_DSCVR_SEND_TARGETS: 268 if (dst_addr->sa_family == AF_INET) { 269 addr = (struct sockaddr_in *)dst_addr; 270 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, 271 addr->sin_port) != QLA_SUCCESS) 272 ret = -EIO; 273 } else if (dst_addr->sa_family == AF_INET6) { 274 /* 275 * TODO: fix qla4xxx_send_tgts 276 */ 277 addr6 = (struct sockaddr_in6 *)dst_addr; 278 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, 279 addr6->sin6_port) != QLA_SUCCESS) 280 ret = -EIO; 281 } else 282 ret = -ENOSYS; 283 break; 284 default: 285 ret = -ENOSYS; 286 } 287 return ret; 288 } 289 290 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) 291 { 292 if (!ddb_entry->sess) 293 return; 294 295 if (ddb_entry->conn) { 296 atomic_set(&ddb_entry->state, DDB_STATE_DEAD); 297 iscsi_remove_session(ddb_entry->sess); 298 } 299 iscsi_free_session(ddb_entry->sess); 300 } 301 302 int qla4xxx_add_sess(struct ddb_entry *ddb_entry) 303 { 304 int err; 305 306 ddb_entry->sess->recovery_tmo = ql4xsess_recovery_tmo; 307 308 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); 309 if (err) { 310 DEBUG2(printk(KERN_ERR "Could not add session.\n")); 311 return err; 312 } 313 314 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0); 315 if (!ddb_entry->conn) { 316 iscsi_remove_session(ddb_entry->sess); 317 DEBUG2(printk(KERN_ERR "Could not add connection.\n")); 318 return -ENOMEM; 319 } 320 321 /* finally ready to go */ 322 iscsi_unblock_session(ddb_entry->sess); 323 return 0; 324 } 325 326 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) 327 { 328 struct ddb_entry *ddb_entry; 329 struct iscsi_cls_session *sess; 330 331 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport, 332 sizeof(struct ddb_entry)); 333 if (!sess) 334 return NULL; 335 336 ddb_entry = sess->dd_data; 337 memset(ddb_entry, 0, sizeof(*ddb_entry)); 338 ddb_entry->ha = ha; 339 ddb_entry->sess = sess; 340 return ddb_entry; 341 } 342 343 static void qla4xxx_scan_start(struct Scsi_Host *shost) 344 { 345 struct scsi_qla_host *ha = shost_priv(shost); 346 struct ddb_entry *ddb_entry, *ddbtemp; 347 348 /* finish setup of sessions that were already setup in firmware */ 349 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { 350 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) 351 qla4xxx_add_sess(ddb_entry); 352 } 353 } 354 355 /* 356 * Timer routines 357 */ 358 359 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, 360 unsigned long interval) 361 { 362 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", 363 __func__, ha->host->host_no)); 364 init_timer(&ha->timer); 365 ha->timer.expires = jiffies + interval * HZ; 366 ha->timer.data = (unsigned long)ha; 367 ha->timer.function = (void (*)(unsigned long))func; 368 add_timer(&ha->timer); 369 ha->timer_active = 1; 370 } 371 372 static void qla4xxx_stop_timer(struct scsi_qla_host *ha) 373 { 374 del_timer_sync(&ha->timer); 375 ha->timer_active = 0; 376 } 377 378 /*** 379 * qla4xxx_mark_device_missing - mark a device as missing. 380 * @ha: Pointer to host adapter structure. 381 * @ddb_entry: Pointer to device database entry 382 * 383 * This routine marks a device missing and close connection. 384 **/ 385 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, 386 struct ddb_entry *ddb_entry) 387 { 388 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) { 389 atomic_set(&ddb_entry->state, DDB_STATE_MISSING); 390 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n", 391 ha->host_no, ddb_entry->fw_ddb_index)); 392 } else 393 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no, 394 ddb_entry->fw_ddb_index)) 395 396 iscsi_block_session(ddb_entry->sess); 397 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); 398 } 399 400 /** 401 * qla4xxx_mark_all_devices_missing - mark all devices as missing. 402 * @ha: Pointer to host adapter structure. 403 * 404 * This routine marks a device missing and resets the relogin retry count. 405 **/ 406 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha) 407 { 408 struct ddb_entry *ddb_entry, *ddbtemp; 409 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { 410 qla4xxx_mark_device_missing(ha, ddb_entry); 411 } 412 } 413 414 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, 415 struct ddb_entry *ddb_entry, 416 struct scsi_cmnd *cmd) 417 { 418 struct srb *srb; 419 420 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); 421 if (!srb) 422 return srb; 423 424 kref_init(&srb->srb_ref); 425 srb->ha = ha; 426 srb->ddb = ddb_entry; 427 srb->cmd = cmd; 428 srb->flags = 0; 429 CMD_SP(cmd) = (void *)srb; 430 431 return srb; 432 } 433 434 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) 435 { 436 struct scsi_cmnd *cmd = srb->cmd; 437 438 if (srb->flags & SRB_DMA_VALID) { 439 scsi_dma_unmap(cmd); 440 srb->flags &= ~SRB_DMA_VALID; 441 } 442 CMD_SP(cmd) = NULL; 443 } 444 445 void qla4xxx_srb_compl(struct kref *ref) 446 { 447 struct srb *srb = container_of(ref, struct srb, srb_ref); 448 struct scsi_cmnd *cmd = srb->cmd; 449 struct scsi_qla_host *ha = srb->ha; 450 451 qla4xxx_srb_free_dma(ha, srb); 452 453 mempool_free(srb, ha->srb_mempool); 454 455 cmd->scsi_done(cmd); 456 } 457 458 /** 459 * qla4xxx_queuecommand - scsi layer issues scsi command to driver. 460 * @host: scsi host 461 * @cmd: Pointer to Linux's SCSI command structure 462 * 463 * Remarks: 464 * This routine is invoked by Linux to send a SCSI command to the driver. 465 * The mid-level driver tries to ensure that queuecommand never gets 466 * invoked concurrently with itself or the interrupt handler (although 467 * the interrupt handler may call this routine as part of request- 468 * completion handling). Unfortunely, it sometimes calls the scheduler 469 * in interrupt context which is a big NO! NO!. 470 **/ 471 static int qla4xxx_queuecommand(struct Scsi_Host *host, struct scsi_cmnd *cmd) 472 { 473 struct scsi_qla_host *ha = to_qla_host(host); 474 struct ddb_entry *ddb_entry = cmd->device->hostdata; 475 struct iscsi_cls_session *sess = ddb_entry->sess; 476 struct srb *srb; 477 int rval; 478 479 if (test_bit(AF_EEH_BUSY, &ha->flags)) { 480 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags)) 481 cmd->result = DID_NO_CONNECT << 16; 482 else 483 cmd->result = DID_REQUEUE << 16; 484 goto qc_fail_command; 485 } 486 487 if (!sess) { 488 cmd->result = DID_IMM_RETRY << 16; 489 goto qc_fail_command; 490 } 491 492 rval = iscsi_session_chkready(sess); 493 if (rval) { 494 cmd->result = rval; 495 goto qc_fail_command; 496 } 497 498 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 499 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { 500 cmd->result = DID_NO_CONNECT << 16; 501 goto qc_fail_command; 502 } 503 return SCSI_MLQUEUE_TARGET_BUSY; 504 } 505 506 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 507 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) || 508 test_bit(DPC_RESET_HA, &ha->dpc_flags) || 509 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) || 510 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) || 511 !test_bit(AF_ONLINE, &ha->flags) || 512 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) 513 goto qc_host_busy; 514 515 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd); 516 if (!srb) 517 goto qc_host_busy; 518 519 rval = qla4xxx_send_command_to_isp(ha, srb); 520 if (rval != QLA_SUCCESS) 521 goto qc_host_busy_free_sp; 522 523 return 0; 524 525 qc_host_busy_free_sp: 526 qla4xxx_srb_free_dma(ha, srb); 527 mempool_free(srb, ha->srb_mempool); 528 529 qc_host_busy: 530 return SCSI_MLQUEUE_HOST_BUSY; 531 532 qc_fail_command: 533 cmd->scsi_done(cmd); 534 535 return 0; 536 } 537 538 /** 539 * qla4xxx_mem_free - frees memory allocated to adapter 540 * @ha: Pointer to host adapter structure. 541 * 542 * Frees memory previously allocated by qla4xxx_mem_alloc 543 **/ 544 static void qla4xxx_mem_free(struct scsi_qla_host *ha) 545 { 546 if (ha->queues) 547 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, 548 ha->queues_dma); 549 550 ha->queues_len = 0; 551 ha->queues = NULL; 552 ha->queues_dma = 0; 553 ha->request_ring = NULL; 554 ha->request_dma = 0; 555 ha->response_ring = NULL; 556 ha->response_dma = 0; 557 ha->shadow_regs = NULL; 558 ha->shadow_regs_dma = 0; 559 560 /* Free srb pool. */ 561 if (ha->srb_mempool) 562 mempool_destroy(ha->srb_mempool); 563 564 ha->srb_mempool = NULL; 565 566 /* release io space registers */ 567 if (is_qla8022(ha)) { 568 if (ha->nx_pcibase) 569 iounmap( 570 (struct device_reg_82xx __iomem *)ha->nx_pcibase); 571 } else if (ha->reg) 572 iounmap(ha->reg); 573 pci_release_regions(ha->pdev); 574 } 575 576 /** 577 * qla4xxx_mem_alloc - allocates memory for use by adapter. 578 * @ha: Pointer to host adapter structure 579 * 580 * Allocates DMA memory for request and response queues. Also allocates memory 581 * for srbs. 582 **/ 583 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) 584 { 585 unsigned long align; 586 587 /* Allocate contiguous block of DMA memory for queues. */ 588 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 589 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + 590 sizeof(struct shadow_regs) + 591 MEM_ALIGN_VALUE + 592 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); 593 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, 594 &ha->queues_dma, GFP_KERNEL); 595 if (ha->queues == NULL) { 596 ql4_printk(KERN_WARNING, ha, 597 "Memory Allocation failed - queues.\n"); 598 599 goto mem_alloc_error_exit; 600 } 601 memset(ha->queues, 0, ha->queues_len); 602 603 /* 604 * As per RISC alignment requirements -- the bus-address must be a 605 * multiple of the request-ring size (in bytes). 606 */ 607 align = 0; 608 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) 609 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & 610 (MEM_ALIGN_VALUE - 1)); 611 612 /* Update request and response queue pointers. */ 613 ha->request_dma = ha->queues_dma + align; 614 ha->request_ring = (struct queue_entry *) (ha->queues + align); 615 ha->response_dma = ha->queues_dma + align + 616 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); 617 ha->response_ring = (struct queue_entry *) (ha->queues + align + 618 (REQUEST_QUEUE_DEPTH * 619 QUEUE_SIZE)); 620 ha->shadow_regs_dma = ha->queues_dma + align + 621 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 622 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); 623 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + 624 (REQUEST_QUEUE_DEPTH * 625 QUEUE_SIZE) + 626 (RESPONSE_QUEUE_DEPTH * 627 QUEUE_SIZE)); 628 629 /* Allocate memory for srb pool. */ 630 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, 631 mempool_free_slab, srb_cachep); 632 if (ha->srb_mempool == NULL) { 633 ql4_printk(KERN_WARNING, ha, 634 "Memory Allocation failed - SRB Pool.\n"); 635 636 goto mem_alloc_error_exit; 637 } 638 639 return QLA_SUCCESS; 640 641 mem_alloc_error_exit: 642 qla4xxx_mem_free(ha); 643 return QLA_ERROR; 644 } 645 646 /** 647 * qla4_8xxx_check_fw_alive - Check firmware health 648 * @ha: Pointer to host adapter structure. 649 * 650 * Context: Interrupt 651 **/ 652 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha) 653 { 654 uint32_t fw_heartbeat_counter, halt_status; 655 656 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER); 657 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */ 658 if (fw_heartbeat_counter == 0xffffffff) { 659 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen " 660 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n", 661 ha->host_no, __func__)); 662 return; 663 } 664 665 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) { 666 ha->seconds_since_last_heartbeat++; 667 /* FW not alive after 2 seconds */ 668 if (ha->seconds_since_last_heartbeat == 2) { 669 ha->seconds_since_last_heartbeat = 0; 670 halt_status = qla4_8xxx_rd_32(ha, 671 QLA82XX_PEG_HALT_STATUS1); 672 673 ql4_printk(KERN_INFO, ha, 674 "scsi(%ld): %s, Dumping hw/fw registers:\n " 675 " PEG_HALT_STATUS1: 0x%x, PEG_HALT_STATUS2:" 676 " 0x%x,\n PEG_NET_0_PC: 0x%x, PEG_NET_1_PC:" 677 " 0x%x,\n PEG_NET_2_PC: 0x%x, PEG_NET_3_PC:" 678 " 0x%x,\n PEG_NET_4_PC: 0x%x\n", 679 ha->host_no, __func__, halt_status, 680 qla4_8xxx_rd_32(ha, 681 QLA82XX_PEG_HALT_STATUS2), 682 qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_0 + 683 0x3c), 684 qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_1 + 685 0x3c), 686 qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_2 + 687 0x3c), 688 qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_3 + 689 0x3c), 690 qla4_8xxx_rd_32(ha, QLA82XX_CRB_PEG_NET_4 + 691 0x3c)); 692 693 /* Since we cannot change dev_state in interrupt 694 * context, set appropriate DPC flag then wakeup 695 * DPC */ 696 if (halt_status & HALT_STATUS_UNRECOVERABLE) 697 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags); 698 else { 699 printk("scsi%ld: %s: detect abort needed!\n", 700 ha->host_no, __func__); 701 set_bit(DPC_RESET_HA, &ha->dpc_flags); 702 } 703 qla4xxx_wake_dpc(ha); 704 qla4xxx_mailbox_premature_completion(ha); 705 } 706 } else 707 ha->seconds_since_last_heartbeat = 0; 708 709 ha->fw_heartbeat_counter = fw_heartbeat_counter; 710 } 711 712 /** 713 * qla4_8xxx_watchdog - Poll dev state 714 * @ha: Pointer to host adapter structure. 715 * 716 * Context: Interrupt 717 **/ 718 void qla4_8xxx_watchdog(struct scsi_qla_host *ha) 719 { 720 uint32_t dev_state; 721 722 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE); 723 724 /* don't poll if reset is going on */ 725 if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) || 726 test_bit(DPC_RESET_HA, &ha->dpc_flags) || 727 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags))) { 728 if (dev_state == QLA82XX_DEV_NEED_RESET && 729 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) { 730 if (!ql4xdontresethba) { 731 ql4_printk(KERN_INFO, ha, "%s: HW State: " 732 "NEED RESET!\n", __func__); 733 set_bit(DPC_RESET_HA, &ha->dpc_flags); 734 qla4xxx_wake_dpc(ha); 735 qla4xxx_mailbox_premature_completion(ha); 736 } 737 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT && 738 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) { 739 ql4_printk(KERN_INFO, ha, "%s: HW State: NEED QUIES!\n", 740 __func__); 741 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags); 742 qla4xxx_wake_dpc(ha); 743 } else { 744 /* Check firmware health */ 745 qla4_8xxx_check_fw_alive(ha); 746 } 747 } 748 } 749 750 /** 751 * qla4xxx_timer - checks every second for work to do. 752 * @ha: Pointer to host adapter structure. 753 **/ 754 static void qla4xxx_timer(struct scsi_qla_host *ha) 755 { 756 struct ddb_entry *ddb_entry, *dtemp; 757 int start_dpc = 0; 758 uint16_t w; 759 760 /* If we are in the middle of AER/EEH processing 761 * skip any processing and reschedule the timer 762 */ 763 if (test_bit(AF_EEH_BUSY, &ha->flags)) { 764 mod_timer(&ha->timer, jiffies + HZ); 765 return; 766 } 767 768 /* Hardware read to trigger an EEH error during mailbox waits. */ 769 if (!pci_channel_offline(ha->pdev)) 770 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w); 771 772 if (is_qla8022(ha)) { 773 qla4_8xxx_watchdog(ha); 774 } 775 776 /* Search for relogin's to time-out and port down retry. */ 777 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { 778 /* Count down time between sending relogins */ 779 if (adapter_up(ha) && 780 !test_bit(DF_RELOGIN, &ddb_entry->flags) && 781 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 782 if (atomic_read(&ddb_entry->retry_relogin_timer) != 783 INVALID_ENTRY) { 784 if (atomic_read(&ddb_entry->retry_relogin_timer) 785 == 0) { 786 atomic_set(&ddb_entry-> 787 retry_relogin_timer, 788 INVALID_ENTRY); 789 set_bit(DPC_RELOGIN_DEVICE, 790 &ha->dpc_flags); 791 set_bit(DF_RELOGIN, &ddb_entry->flags); 792 DEBUG2(printk("scsi%ld: %s: ddb [%d]" 793 " login device\n", 794 ha->host_no, __func__, 795 ddb_entry->fw_ddb_index)); 796 } else 797 atomic_dec(&ddb_entry-> 798 retry_relogin_timer); 799 } 800 } 801 802 /* Wait for relogin to timeout */ 803 if (atomic_read(&ddb_entry->relogin_timer) && 804 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { 805 /* 806 * If the relogin times out and the device is 807 * still NOT ONLINE then try and relogin again. 808 */ 809 if (atomic_read(&ddb_entry->state) != 810 DDB_STATE_ONLINE && 811 ddb_entry->fw_ddb_device_state == 812 DDB_DS_SESSION_FAILED) { 813 /* Reset retry relogin timer */ 814 atomic_inc(&ddb_entry->relogin_retry_count); 815 DEBUG2(printk("scsi%ld: ddb [%d] relogin" 816 " timed out-retrying" 817 " relogin (%d)\n", 818 ha->host_no, 819 ddb_entry->fw_ddb_index, 820 atomic_read(&ddb_entry-> 821 relogin_retry_count)) 822 ); 823 start_dpc++; 824 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] " 825 "initiate relogin after" 826 " %d seconds\n", 827 ha->host_no, ddb_entry->bus, 828 ddb_entry->target, 829 ddb_entry->fw_ddb_index, 830 ddb_entry->default_time2wait + 4) 831 ); 832 833 atomic_set(&ddb_entry->retry_relogin_timer, 834 ddb_entry->default_time2wait + 4); 835 } 836 } 837 } 838 839 if (!is_qla8022(ha)) { 840 /* Check for heartbeat interval. */ 841 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && 842 ha->heartbeat_interval != 0) { 843 ha->seconds_since_last_heartbeat++; 844 if (ha->seconds_since_last_heartbeat > 845 ha->heartbeat_interval + 2) 846 set_bit(DPC_RESET_HA, &ha->dpc_flags); 847 } 848 } 849 850 /* Wakeup the dpc routine for this adapter, if needed. */ 851 if (start_dpc || 852 test_bit(DPC_RESET_HA, &ha->dpc_flags) || 853 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || 854 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || 855 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) || 856 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 857 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || 858 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) || 859 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) || 860 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) || 861 test_bit(DPC_AEN, &ha->dpc_flags)) { 862 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" 863 " - dpc flags = 0x%lx\n", 864 ha->host_no, __func__, ha->dpc_flags)); 865 qla4xxx_wake_dpc(ha); 866 } 867 868 /* Reschedule timer thread to call us back in one second */ 869 mod_timer(&ha->timer, jiffies + HZ); 870 871 DEBUG2(ha->seconds_since_last_intr++); 872 } 873 874 /** 875 * qla4xxx_cmd_wait - waits for all outstanding commands to complete 876 * @ha: Pointer to host adapter structure. 877 * 878 * This routine stalls the driver until all outstanding commands are returned. 879 * Caller must release the Hardware Lock prior to calling this routine. 880 **/ 881 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) 882 { 883 uint32_t index = 0; 884 unsigned long flags; 885 struct scsi_cmnd *cmd; 886 887 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ); 888 889 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to " 890 "complete\n", WAIT_CMD_TOV)); 891 892 while (!time_after_eq(jiffies, wtime)) { 893 spin_lock_irqsave(&ha->hardware_lock, flags); 894 /* Find a command that hasn't completed. */ 895 for (index = 0; index < ha->host->can_queue; index++) { 896 cmd = scsi_host_find_tag(ha->host, index); 897 /* 898 * We cannot just check if the index is valid, 899 * becase if we are run from the scsi eh, then 900 * the scsi/block layer is going to prevent 901 * the tag from being released. 902 */ 903 if (cmd != NULL && CMD_SP(cmd)) 904 break; 905 } 906 spin_unlock_irqrestore(&ha->hardware_lock, flags); 907 908 /* If No Commands are pending, wait is complete */ 909 if (index == ha->host->can_queue) 910 return QLA_SUCCESS; 911 912 msleep(1000); 913 } 914 /* If we timed out on waiting for commands to come back 915 * return ERROR. */ 916 return QLA_ERROR; 917 } 918 919 int qla4xxx_hw_reset(struct scsi_qla_host *ha) 920 { 921 uint32_t ctrl_status; 922 unsigned long flags = 0; 923 924 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__)); 925 926 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS) 927 return QLA_ERROR; 928 929 spin_lock_irqsave(&ha->hardware_lock, flags); 930 931 /* 932 * If the SCSI Reset Interrupt bit is set, clear it. 933 * Otherwise, the Soft Reset won't work. 934 */ 935 ctrl_status = readw(&ha->reg->ctrl_status); 936 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) 937 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 938 939 /* Issue Soft Reset */ 940 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); 941 readl(&ha->reg->ctrl_status); 942 943 spin_unlock_irqrestore(&ha->hardware_lock, flags); 944 return QLA_SUCCESS; 945 } 946 947 /** 948 * qla4xxx_soft_reset - performs soft reset. 949 * @ha: Pointer to host adapter structure. 950 **/ 951 int qla4xxx_soft_reset(struct scsi_qla_host *ha) 952 { 953 uint32_t max_wait_time; 954 unsigned long flags = 0; 955 int status; 956 uint32_t ctrl_status; 957 958 status = qla4xxx_hw_reset(ha); 959 if (status != QLA_SUCCESS) 960 return status; 961 962 status = QLA_ERROR; 963 /* Wait until the Network Reset Intr bit is cleared */ 964 max_wait_time = RESET_INTR_TOV; 965 do { 966 spin_lock_irqsave(&ha->hardware_lock, flags); 967 ctrl_status = readw(&ha->reg->ctrl_status); 968 spin_unlock_irqrestore(&ha->hardware_lock, flags); 969 970 if ((ctrl_status & CSR_NET_RESET_INTR) == 0) 971 break; 972 973 msleep(1000); 974 } while ((--max_wait_time)); 975 976 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { 977 DEBUG2(printk(KERN_WARNING 978 "scsi%ld: Network Reset Intr not cleared by " 979 "Network function, clearing it now!\n", 980 ha->host_no)); 981 spin_lock_irqsave(&ha->hardware_lock, flags); 982 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); 983 readl(&ha->reg->ctrl_status); 984 spin_unlock_irqrestore(&ha->hardware_lock, flags); 985 } 986 987 /* Wait until the firmware tells us the Soft Reset is done */ 988 max_wait_time = SOFT_RESET_TOV; 989 do { 990 spin_lock_irqsave(&ha->hardware_lock, flags); 991 ctrl_status = readw(&ha->reg->ctrl_status); 992 spin_unlock_irqrestore(&ha->hardware_lock, flags); 993 994 if ((ctrl_status & CSR_SOFT_RESET) == 0) { 995 status = QLA_SUCCESS; 996 break; 997 } 998 999 msleep(1000); 1000 } while ((--max_wait_time)); 1001 1002 /* 1003 * Also, make sure that the SCSI Reset Interrupt bit has been cleared 1004 * after the soft reset has taken place. 1005 */ 1006 spin_lock_irqsave(&ha->hardware_lock, flags); 1007 ctrl_status = readw(&ha->reg->ctrl_status); 1008 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { 1009 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 1010 readl(&ha->reg->ctrl_status); 1011 } 1012 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1013 1014 /* If soft reset fails then most probably the bios on other 1015 * function is also enabled. 1016 * Since the initialization is sequential the other fn 1017 * wont be able to acknowledge the soft reset. 1018 * Issue a force soft reset to workaround this scenario. 1019 */ 1020 if (max_wait_time == 0) { 1021 /* Issue Force Soft Reset */ 1022 spin_lock_irqsave(&ha->hardware_lock, flags); 1023 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); 1024 readl(&ha->reg->ctrl_status); 1025 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1026 /* Wait until the firmware tells us the Soft Reset is done */ 1027 max_wait_time = SOFT_RESET_TOV; 1028 do { 1029 spin_lock_irqsave(&ha->hardware_lock, flags); 1030 ctrl_status = readw(&ha->reg->ctrl_status); 1031 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1032 1033 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { 1034 status = QLA_SUCCESS; 1035 break; 1036 } 1037 1038 msleep(1000); 1039 } while ((--max_wait_time)); 1040 } 1041 1042 return status; 1043 } 1044 1045 /** 1046 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S. 1047 * @ha: Pointer to host adapter structure. 1048 * @res: returned scsi status 1049 * 1050 * This routine is called just prior to a HARD RESET to return all 1051 * outstanding commands back to the Operating System. 1052 * Caller should make sure that the following locks are released 1053 * before this calling routine: Hardware lock, and io_request_lock. 1054 **/ 1055 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res) 1056 { 1057 struct srb *srb; 1058 int i; 1059 unsigned long flags; 1060 1061 spin_lock_irqsave(&ha->hardware_lock, flags); 1062 for (i = 0; i < ha->host->can_queue; i++) { 1063 srb = qla4xxx_del_from_active_array(ha, i); 1064 if (srb != NULL) { 1065 srb->cmd->result = res; 1066 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 1067 } 1068 } 1069 spin_unlock_irqrestore(&ha->hardware_lock, flags); 1070 } 1071 1072 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha) 1073 { 1074 clear_bit(AF_ONLINE, &ha->flags); 1075 1076 /* Disable the board */ 1077 ql4_printk(KERN_INFO, ha, "Disabling the board\n"); 1078 1079 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16); 1080 qla4xxx_mark_all_devices_missing(ha); 1081 clear_bit(AF_INIT_DONE, &ha->flags); 1082 } 1083 1084 /** 1085 * qla4xxx_recover_adapter - recovers adapter after a fatal error 1086 * @ha: Pointer to host adapter structure. 1087 **/ 1088 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha) 1089 { 1090 int status = QLA_ERROR; 1091 uint8_t reset_chip = 0; 1092 1093 /* Stall incoming I/O until we are done */ 1094 scsi_block_requests(ha->host); 1095 clear_bit(AF_ONLINE, &ha->flags); 1096 1097 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__)); 1098 1099 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags); 1100 1101 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) 1102 reset_chip = 1; 1103 1104 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific) 1105 * do not reset adapter, jump to initialize_adapter */ 1106 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { 1107 status = QLA_SUCCESS; 1108 goto recover_ha_init_adapter; 1109 } 1110 1111 /* For the ISP-82xx adapter, issue a stop_firmware if invoked 1112 * from eh_host_reset or ioctl module */ 1113 if (is_qla8022(ha) && !reset_chip && 1114 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) { 1115 1116 DEBUG2(ql4_printk(KERN_INFO, ha, 1117 "scsi%ld: %s - Performing stop_firmware...\n", 1118 ha->host_no, __func__)); 1119 status = ha->isp_ops->reset_firmware(ha); 1120 if (status == QLA_SUCCESS) { 1121 if (!test_bit(AF_FW_RECOVERY, &ha->flags)) 1122 qla4xxx_cmd_wait(ha); 1123 ha->isp_ops->disable_intrs(ha); 1124 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1125 qla4xxx_abort_active_cmds(ha, DID_RESET << 16); 1126 } else { 1127 /* If the stop_firmware fails then 1128 * reset the entire chip */ 1129 reset_chip = 1; 1130 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags); 1131 set_bit(DPC_RESET_HA, &ha->dpc_flags); 1132 } 1133 } 1134 1135 /* Issue full chip reset if recovering from a catastrophic error, 1136 * or if stop_firmware fails for ISP-82xx. 1137 * This is the default case for ISP-4xxx */ 1138 if (!is_qla8022(ha) || reset_chip) { 1139 if (!test_bit(AF_FW_RECOVERY, &ha->flags)) 1140 qla4xxx_cmd_wait(ha); 1141 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1142 qla4xxx_abort_active_cmds(ha, DID_RESET << 16); 1143 DEBUG2(ql4_printk(KERN_INFO, ha, 1144 "scsi%ld: %s - Performing chip reset..\n", 1145 ha->host_no, __func__)); 1146 status = ha->isp_ops->reset_chip(ha); 1147 } 1148 1149 /* Flush any pending ddb changed AENs */ 1150 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1151 1152 recover_ha_init_adapter: 1153 /* Upon successful firmware/chip reset, re-initialize the adapter */ 1154 if (status == QLA_SUCCESS) { 1155 /* For ISP-4xxx, force function 1 to always initialize 1156 * before function 3 to prevent both funcions from 1157 * stepping on top of the other */ 1158 if (!is_qla8022(ha) && (ha->mac_index == 3)) 1159 ssleep(6); 1160 1161 /* NOTE: AF_ONLINE flag set upon successful completion of 1162 * qla4xxx_initialize_adapter */ 1163 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST); 1164 } 1165 1166 /* Retry failed adapter initialization, if necessary 1167 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific) 1168 * case to prevent ping-pong resets between functions */ 1169 if (!test_bit(AF_ONLINE, &ha->flags) && 1170 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { 1171 /* Adapter initialization failed, see if we can retry 1172 * resetting the ha. 1173 * Since we don't want to block the DPC for too long 1174 * with multiple resets in the same thread, 1175 * utilize DPC to retry */ 1176 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { 1177 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; 1178 DEBUG2(printk("scsi%ld: recover adapter - retrying " 1179 "(%d) more times\n", ha->host_no, 1180 ha->retry_reset_ha_cnt)); 1181 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 1182 status = QLA_ERROR; 1183 } else { 1184 if (ha->retry_reset_ha_cnt > 0) { 1185 /* Schedule another Reset HA--DPC will retry */ 1186 ha->retry_reset_ha_cnt--; 1187 DEBUG2(printk("scsi%ld: recover adapter - " 1188 "retry remaining %d\n", 1189 ha->host_no, 1190 ha->retry_reset_ha_cnt)); 1191 status = QLA_ERROR; 1192 } 1193 1194 if (ha->retry_reset_ha_cnt == 0) { 1195 /* Recover adapter retries have been exhausted. 1196 * Adapter DEAD */ 1197 DEBUG2(printk("scsi%ld: recover adapter " 1198 "failed - board disabled\n", 1199 ha->host_no)); 1200 qla4xxx_dead_adapter_cleanup(ha); 1201 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 1202 clear_bit(DPC_RESET_HA, &ha->dpc_flags); 1203 clear_bit(DPC_RESET_HA_FW_CONTEXT, 1204 &ha->dpc_flags); 1205 status = QLA_ERROR; 1206 } 1207 } 1208 } else { 1209 clear_bit(DPC_RESET_HA, &ha->dpc_flags); 1210 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags); 1211 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 1212 } 1213 1214 ha->adapter_error_count++; 1215 1216 if (test_bit(AF_ONLINE, &ha->flags)) 1217 ha->isp_ops->enable_intrs(ha); 1218 1219 scsi_unblock_requests(ha->host); 1220 1221 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags); 1222 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no, 1223 status == QLA_ERROR ? "FAILED" : "SUCCEEDED")); 1224 1225 return status; 1226 } 1227 1228 static void qla4xxx_relogin_all_devices(struct scsi_qla_host *ha) 1229 { 1230 struct ddb_entry *ddb_entry, *dtemp; 1231 1232 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { 1233 if ((atomic_read(&ddb_entry->state) == DDB_STATE_MISSING) || 1234 (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD)) { 1235 if (ddb_entry->fw_ddb_device_state == 1236 DDB_DS_SESSION_ACTIVE) { 1237 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE); 1238 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]" 1239 " marked ONLINE\n", ha->host_no, __func__, 1240 ddb_entry->fw_ddb_index); 1241 1242 iscsi_unblock_session(ddb_entry->sess); 1243 } else 1244 qla4xxx_relogin_device(ha, ddb_entry); 1245 } 1246 } 1247 } 1248 1249 void qla4xxx_wake_dpc(struct scsi_qla_host *ha) 1250 { 1251 if (ha->dpc_thread) 1252 queue_work(ha->dpc_thread, &ha->dpc_work); 1253 } 1254 1255 /** 1256 * qla4xxx_do_dpc - dpc routine 1257 * @data: in our case pointer to adapter structure 1258 * 1259 * This routine is a task that is schedule by the interrupt handler 1260 * to perform the background processing for interrupts. We put it 1261 * on a task queue that is consumed whenever the scheduler runs; that's 1262 * so you can do anything (i.e. put the process to sleep etc). In fact, 1263 * the mid-level tries to sleep when it reaches the driver threshold 1264 * "host->can_queue". This can cause a panic if we were in our interrupt code. 1265 **/ 1266 static void qla4xxx_do_dpc(struct work_struct *work) 1267 { 1268 struct scsi_qla_host *ha = 1269 container_of(work, struct scsi_qla_host, dpc_work); 1270 struct ddb_entry *ddb_entry, *dtemp; 1271 int status = QLA_ERROR; 1272 1273 DEBUG2(printk("scsi%ld: %s: DPC handler waking up." 1274 "flags = 0x%08lx, dpc_flags = 0x%08lx\n", 1275 ha->host_no, __func__, ha->flags, ha->dpc_flags)) 1276 1277 /* Initialization not yet finished. Don't do anything yet. */ 1278 if (!test_bit(AF_INIT_DONE, &ha->flags)) 1279 return; 1280 1281 if (test_bit(AF_EEH_BUSY, &ha->flags)) { 1282 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n", 1283 ha->host_no, __func__, ha->flags)); 1284 return; 1285 } 1286 1287 if (is_qla8022(ha)) { 1288 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) { 1289 qla4_8xxx_idc_lock(ha); 1290 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE, 1291 QLA82XX_DEV_FAILED); 1292 qla4_8xxx_idc_unlock(ha); 1293 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n"); 1294 qla4_8xxx_device_state_handler(ha); 1295 } 1296 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) { 1297 qla4_8xxx_need_qsnt_handler(ha); 1298 } 1299 } 1300 1301 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) && 1302 (test_bit(DPC_RESET_HA, &ha->dpc_flags) || 1303 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 1304 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) { 1305 if (ql4xdontresethba) { 1306 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n", 1307 ha->host_no, __func__)); 1308 clear_bit(DPC_RESET_HA, &ha->dpc_flags); 1309 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1310 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags); 1311 goto dpc_post_reset_ha; 1312 } 1313 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) || 1314 test_bit(DPC_RESET_HA, &ha->dpc_flags)) 1315 qla4xxx_recover_adapter(ha); 1316 1317 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { 1318 uint8_t wait_time = RESET_INTR_TOV; 1319 1320 while ((readw(&ha->reg->ctrl_status) & 1321 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { 1322 if (--wait_time == 0) 1323 break; 1324 msleep(1000); 1325 } 1326 if (wait_time == 0) 1327 DEBUG2(printk("scsi%ld: %s: SR|FSR " 1328 "bit not cleared-- resetting\n", 1329 ha->host_no, __func__)); 1330 qla4xxx_abort_active_cmds(ha, DID_RESET << 16); 1331 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) { 1332 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1333 status = qla4xxx_recover_adapter(ha); 1334 } 1335 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1336 if (status == QLA_SUCCESS) 1337 ha->isp_ops->enable_intrs(ha); 1338 } 1339 } 1340 1341 dpc_post_reset_ha: 1342 /* ---- process AEN? --- */ 1343 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) 1344 qla4xxx_process_aen(ha, PROCESS_ALL_AENS); 1345 1346 /* ---- Get DHCP IP Address? --- */ 1347 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) 1348 qla4xxx_get_dhcp_ip_address(ha); 1349 1350 /* ---- link change? --- */ 1351 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) { 1352 if (!test_bit(AF_LINK_UP, &ha->flags)) { 1353 /* ---- link down? --- */ 1354 qla4xxx_mark_all_devices_missing(ha); 1355 } else { 1356 /* ---- link up? --- * 1357 * F/W will auto login to all devices ONLY ONCE after 1358 * link up during driver initialization and runtime 1359 * fatal error recovery. Therefore, the driver must 1360 * manually relogin to devices when recovering from 1361 * connection failures, logouts, expired KATO, etc. */ 1362 1363 qla4xxx_relogin_all_devices(ha); 1364 } 1365 } 1366 1367 /* ---- relogin device? --- */ 1368 if (adapter_up(ha) && 1369 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { 1370 list_for_each_entry_safe(ddb_entry, dtemp, 1371 &ha->ddb_list, list) { 1372 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && 1373 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) 1374 qla4xxx_relogin_device(ha, ddb_entry); 1375 1376 /* 1377 * If mbx cmd times out there is no point 1378 * in continuing further. 1379 * With large no of targets this can hang 1380 * the system. 1381 */ 1382 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { 1383 printk(KERN_WARNING "scsi%ld: %s: " 1384 "need to reset hba\n", 1385 ha->host_no, __func__); 1386 break; 1387 } 1388 } 1389 } 1390 1391 } 1392 1393 /** 1394 * qla4xxx_free_adapter - release the adapter 1395 * @ha: pointer to adapter structure 1396 **/ 1397 static void qla4xxx_free_adapter(struct scsi_qla_host *ha) 1398 { 1399 1400 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { 1401 /* Turn-off interrupts on the card. */ 1402 ha->isp_ops->disable_intrs(ha); 1403 } 1404 1405 /* Remove timer thread, if present */ 1406 if (ha->timer_active) 1407 qla4xxx_stop_timer(ha); 1408 1409 /* Kill the kernel thread for this host */ 1410 if (ha->dpc_thread) 1411 destroy_workqueue(ha->dpc_thread); 1412 1413 /* Put firmware in known state */ 1414 ha->isp_ops->reset_firmware(ha); 1415 1416 if (is_qla8022(ha)) { 1417 qla4_8xxx_idc_lock(ha); 1418 qla4_8xxx_clear_drv_active(ha); 1419 qla4_8xxx_idc_unlock(ha); 1420 } 1421 1422 /* Detach interrupts */ 1423 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) 1424 qla4xxx_free_irqs(ha); 1425 1426 /* free extra memory */ 1427 qla4xxx_mem_free(ha); 1428 } 1429 1430 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha) 1431 { 1432 int status = 0; 1433 uint8_t revision_id; 1434 unsigned long mem_base, mem_len, db_base, db_len; 1435 struct pci_dev *pdev = ha->pdev; 1436 1437 status = pci_request_regions(pdev, DRIVER_NAME); 1438 if (status) { 1439 printk(KERN_WARNING 1440 "scsi(%ld) Failed to reserve PIO regions (%s) " 1441 "status=%d\n", ha->host_no, pci_name(pdev), status); 1442 goto iospace_error_exit; 1443 } 1444 1445 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id); 1446 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n", 1447 __func__, revision_id)); 1448 ha->revision_id = revision_id; 1449 1450 /* remap phys address */ 1451 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */ 1452 mem_len = pci_resource_len(pdev, 0); 1453 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n", 1454 __func__, mem_base, mem_len)); 1455 1456 /* mapping of pcibase pointer */ 1457 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len); 1458 if (!ha->nx_pcibase) { 1459 printk(KERN_ERR 1460 "cannot remap MMIO (%s), aborting\n", pci_name(pdev)); 1461 pci_release_regions(ha->pdev); 1462 goto iospace_error_exit; 1463 } 1464 1465 /* Mapping of IO base pointer, door bell read and write pointer */ 1466 1467 /* mapping of IO base pointer */ 1468 ha->qla4_8xxx_reg = 1469 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase + 1470 0xbc000 + (ha->pdev->devfn << 11)); 1471 1472 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */ 1473 db_len = pci_resource_len(pdev, 4); 1474 1475 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 : 1476 QLA82XX_CAM_RAM_DB2); 1477 1478 return 0; 1479 iospace_error_exit: 1480 return -ENOMEM; 1481 } 1482 1483 /*** 1484 * qla4xxx_iospace_config - maps registers 1485 * @ha: pointer to adapter structure 1486 * 1487 * This routines maps HBA's registers from the pci address space 1488 * into the kernel virtual address space for memory mapped i/o. 1489 **/ 1490 int qla4xxx_iospace_config(struct scsi_qla_host *ha) 1491 { 1492 unsigned long pio, pio_len, pio_flags; 1493 unsigned long mmio, mmio_len, mmio_flags; 1494 1495 pio = pci_resource_start(ha->pdev, 0); 1496 pio_len = pci_resource_len(ha->pdev, 0); 1497 pio_flags = pci_resource_flags(ha->pdev, 0); 1498 if (pio_flags & IORESOURCE_IO) { 1499 if (pio_len < MIN_IOBASE_LEN) { 1500 ql4_printk(KERN_WARNING, ha, 1501 "Invalid PCI I/O region size\n"); 1502 pio = 0; 1503 } 1504 } else { 1505 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n"); 1506 pio = 0; 1507 } 1508 1509 /* Use MMIO operations for all accesses. */ 1510 mmio = pci_resource_start(ha->pdev, 1); 1511 mmio_len = pci_resource_len(ha->pdev, 1); 1512 mmio_flags = pci_resource_flags(ha->pdev, 1); 1513 1514 if (!(mmio_flags & IORESOURCE_MEM)) { 1515 ql4_printk(KERN_ERR, ha, 1516 "region #0 not an MMIO resource, aborting\n"); 1517 1518 goto iospace_error_exit; 1519 } 1520 1521 if (mmio_len < MIN_IOBASE_LEN) { 1522 ql4_printk(KERN_ERR, ha, 1523 "Invalid PCI mem region size, aborting\n"); 1524 goto iospace_error_exit; 1525 } 1526 1527 if (pci_request_regions(ha->pdev, DRIVER_NAME)) { 1528 ql4_printk(KERN_WARNING, ha, 1529 "Failed to reserve PIO/MMIO regions\n"); 1530 1531 goto iospace_error_exit; 1532 } 1533 1534 ha->pio_address = pio; 1535 ha->pio_length = pio_len; 1536 ha->reg = ioremap(mmio, MIN_IOBASE_LEN); 1537 if (!ha->reg) { 1538 ql4_printk(KERN_ERR, ha, 1539 "cannot remap MMIO, aborting\n"); 1540 1541 goto iospace_error_exit; 1542 } 1543 1544 return 0; 1545 1546 iospace_error_exit: 1547 return -ENOMEM; 1548 } 1549 1550 static struct isp_operations qla4xxx_isp_ops = { 1551 .iospace_config = qla4xxx_iospace_config, 1552 .pci_config = qla4xxx_pci_config, 1553 .disable_intrs = qla4xxx_disable_intrs, 1554 .enable_intrs = qla4xxx_enable_intrs, 1555 .start_firmware = qla4xxx_start_firmware, 1556 .intr_handler = qla4xxx_intr_handler, 1557 .interrupt_service_routine = qla4xxx_interrupt_service_routine, 1558 .reset_chip = qla4xxx_soft_reset, 1559 .reset_firmware = qla4xxx_hw_reset, 1560 .queue_iocb = qla4xxx_queue_iocb, 1561 .complete_iocb = qla4xxx_complete_iocb, 1562 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out, 1563 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in, 1564 .get_sys_info = qla4xxx_get_sys_info, 1565 }; 1566 1567 static struct isp_operations qla4_8xxx_isp_ops = { 1568 .iospace_config = qla4_8xxx_iospace_config, 1569 .pci_config = qla4_8xxx_pci_config, 1570 .disable_intrs = qla4_8xxx_disable_intrs, 1571 .enable_intrs = qla4_8xxx_enable_intrs, 1572 .start_firmware = qla4_8xxx_load_risc, 1573 .intr_handler = qla4_8xxx_intr_handler, 1574 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine, 1575 .reset_chip = qla4_8xxx_isp_reset, 1576 .reset_firmware = qla4_8xxx_stop_firmware, 1577 .queue_iocb = qla4_8xxx_queue_iocb, 1578 .complete_iocb = qla4_8xxx_complete_iocb, 1579 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out, 1580 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in, 1581 .get_sys_info = qla4_8xxx_get_sys_info, 1582 }; 1583 1584 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha) 1585 { 1586 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out); 1587 } 1588 1589 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha) 1590 { 1591 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out)); 1592 } 1593 1594 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha) 1595 { 1596 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in); 1597 } 1598 1599 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha) 1600 { 1601 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in)); 1602 } 1603 1604 /** 1605 * qla4xxx_probe_adapter - callback function to probe HBA 1606 * @pdev: pointer to pci_dev structure 1607 * @pci_device_id: pointer to pci_device entry 1608 * 1609 * This routine will probe for Qlogic 4xxx iSCSI host adapters. 1610 * It returns zero if successful. It also initializes all data necessary for 1611 * the driver. 1612 **/ 1613 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, 1614 const struct pci_device_id *ent) 1615 { 1616 int ret = -ENODEV, status; 1617 struct Scsi_Host *host; 1618 struct scsi_qla_host *ha; 1619 uint8_t init_retry_count = 0; 1620 char buf[34]; 1621 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr; 1622 uint32_t dev_state; 1623 1624 if (pci_enable_device(pdev)) 1625 return -1; 1626 1627 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); 1628 if (host == NULL) { 1629 printk(KERN_WARNING 1630 "qla4xxx: Couldn't allocate host from scsi layer!\n"); 1631 goto probe_disable_device; 1632 } 1633 1634 /* Clear our data area */ 1635 ha = (struct scsi_qla_host *) host->hostdata; 1636 memset(ha, 0, sizeof(*ha)); 1637 1638 /* Save the information from PCI BIOS. */ 1639 ha->pdev = pdev; 1640 ha->host = host; 1641 ha->host_no = host->host_no; 1642 1643 pci_enable_pcie_error_reporting(pdev); 1644 1645 /* Setup Runtime configurable options */ 1646 if (is_qla8022(ha)) { 1647 ha->isp_ops = &qla4_8xxx_isp_ops; 1648 rwlock_init(&ha->hw_lock); 1649 ha->qdr_sn_window = -1; 1650 ha->ddr_mn_window = -1; 1651 ha->curr_window = 255; 1652 ha->func_num = PCI_FUNC(ha->pdev->devfn); 1653 nx_legacy_intr = &legacy_intr[ha->func_num]; 1654 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit; 1655 ha->nx_legacy_intr.tgt_status_reg = 1656 nx_legacy_intr->tgt_status_reg; 1657 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg; 1658 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg; 1659 } else { 1660 ha->isp_ops = &qla4xxx_isp_ops; 1661 } 1662 1663 /* Set EEH reset type to fundamental if required by hba */ 1664 if (is_qla8022(ha)) 1665 pdev->needs_freset = 1; 1666 1667 /* Configure PCI I/O space. */ 1668 ret = ha->isp_ops->iospace_config(ha); 1669 if (ret) 1670 goto probe_failed_ioconfig; 1671 1672 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n", 1673 pdev->device, pdev->irq, ha->reg); 1674 1675 qla4xxx_config_dma_addressing(ha); 1676 1677 /* Initialize lists and spinlocks. */ 1678 INIT_LIST_HEAD(&ha->ddb_list); 1679 INIT_LIST_HEAD(&ha->free_srb_q); 1680 1681 mutex_init(&ha->mbox_sem); 1682 init_completion(&ha->mbx_intr_comp); 1683 1684 spin_lock_init(&ha->hardware_lock); 1685 1686 /* Allocate dma buffers */ 1687 if (qla4xxx_mem_alloc(ha)) { 1688 ql4_printk(KERN_WARNING, ha, 1689 "[ERROR] Failed to allocate memory for adapter\n"); 1690 1691 ret = -ENOMEM; 1692 goto probe_failed; 1693 } 1694 1695 if (is_qla8022(ha)) 1696 (void) qla4_8xxx_get_flash_info(ha); 1697 1698 /* 1699 * Initialize the Host adapter request/response queues and 1700 * firmware 1701 * NOTE: interrupts enabled upon successful completion 1702 */ 1703 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1704 while ((!test_bit(AF_ONLINE, &ha->flags)) && 1705 init_retry_count++ < MAX_INIT_RETRIES) { 1706 1707 if (is_qla8022(ha)) { 1708 qla4_8xxx_idc_lock(ha); 1709 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE); 1710 qla4_8xxx_idc_unlock(ha); 1711 if (dev_state == QLA82XX_DEV_FAILED) { 1712 ql4_printk(KERN_WARNING, ha, "%s: don't retry " 1713 "initialize adapter. H/W is in failed state\n", 1714 __func__); 1715 break; 1716 } 1717 } 1718 DEBUG2(printk("scsi: %s: retrying adapter initialization " 1719 "(%d)\n", __func__, init_retry_count)); 1720 1721 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR) 1722 continue; 1723 1724 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1725 } 1726 1727 if (!test_bit(AF_ONLINE, &ha->flags)) { 1728 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n"); 1729 1730 if (is_qla8022(ha) && ql4xdontresethba) { 1731 /* Put the device in failed state. */ 1732 DEBUG2(printk(KERN_ERR "HW STATE: FAILED\n")); 1733 qla4_8xxx_idc_lock(ha); 1734 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE, 1735 QLA82XX_DEV_FAILED); 1736 qla4_8xxx_idc_unlock(ha); 1737 } 1738 ret = -ENODEV; 1739 goto probe_failed; 1740 } 1741 1742 host->cmd_per_lun = 3; 1743 host->max_channel = 0; 1744 host->max_lun = MAX_LUNS - 1; 1745 host->max_id = MAX_TARGETS; 1746 host->max_cmd_len = IOCB_MAX_CDB_LEN; 1747 host->can_queue = MAX_SRBS ; 1748 host->transportt = qla4xxx_scsi_transport; 1749 1750 ret = scsi_init_shared_tag_map(host, MAX_SRBS); 1751 if (ret) { 1752 ql4_printk(KERN_WARNING, ha, 1753 "scsi_init_shared_tag_map failed\n"); 1754 goto probe_failed; 1755 } 1756 1757 /* Startup the kernel thread for this host adapter. */ 1758 DEBUG2(printk("scsi: %s: Starting kernel thread for " 1759 "qla4xxx_dpc\n", __func__)); 1760 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); 1761 ha->dpc_thread = create_singlethread_workqueue(buf); 1762 if (!ha->dpc_thread) { 1763 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n"); 1764 ret = -ENODEV; 1765 goto probe_failed; 1766 } 1767 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc); 1768 1769 /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc 1770 * (which is called indirectly by qla4xxx_initialize_adapter), 1771 * so that irqs will be registered after crbinit but before 1772 * mbx_intr_enable. 1773 */ 1774 if (!is_qla8022(ha)) { 1775 ret = qla4xxx_request_irqs(ha); 1776 if (ret) { 1777 ql4_printk(KERN_WARNING, ha, "Failed to reserve " 1778 "interrupt %d already in use.\n", pdev->irq); 1779 goto probe_failed; 1780 } 1781 } 1782 1783 pci_save_state(ha->pdev); 1784 ha->isp_ops->enable_intrs(ha); 1785 1786 /* Start timer thread. */ 1787 qla4xxx_start_timer(ha, qla4xxx_timer, 1); 1788 1789 set_bit(AF_INIT_DONE, &ha->flags); 1790 1791 pci_set_drvdata(pdev, ha); 1792 1793 ret = scsi_add_host(host, &pdev->dev); 1794 if (ret) 1795 goto probe_failed; 1796 1797 printk(KERN_INFO 1798 " QLogic iSCSI HBA Driver version: %s\n" 1799 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", 1800 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), 1801 ha->host_no, ha->firmware_version[0], ha->firmware_version[1], 1802 ha->patch_number, ha->build_number); 1803 scsi_scan_host(host); 1804 return 0; 1805 1806 probe_failed: 1807 qla4xxx_free_adapter(ha); 1808 1809 probe_failed_ioconfig: 1810 pci_disable_pcie_error_reporting(pdev); 1811 scsi_host_put(ha->host); 1812 1813 probe_disable_device: 1814 pci_disable_device(pdev); 1815 1816 return ret; 1817 } 1818 1819 /** 1820 * qla4xxx_prevent_other_port_reinit - prevent other port from re-initialize 1821 * @ha: pointer to adapter structure 1822 * 1823 * Mark the other ISP-4xxx port to indicate that the driver is being removed, 1824 * so that the other port will not re-initialize while in the process of 1825 * removing the ha due to driver unload or hba hotplug. 1826 **/ 1827 static void qla4xxx_prevent_other_port_reinit(struct scsi_qla_host *ha) 1828 { 1829 struct scsi_qla_host *other_ha = NULL; 1830 struct pci_dev *other_pdev = NULL; 1831 int fn = ISP4XXX_PCI_FN_2; 1832 1833 /*iscsi function numbers for ISP4xxx is 1 and 3*/ 1834 if (PCI_FUNC(ha->pdev->devfn) & BIT_1) 1835 fn = ISP4XXX_PCI_FN_1; 1836 1837 other_pdev = 1838 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus), 1839 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn), 1840 fn)); 1841 1842 /* Get other_ha if other_pdev is valid and state is enable*/ 1843 if (other_pdev) { 1844 if (atomic_read(&other_pdev->enable_cnt)) { 1845 other_ha = pci_get_drvdata(other_pdev); 1846 if (other_ha) { 1847 set_bit(AF_HA_REMOVAL, &other_ha->flags); 1848 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: " 1849 "Prevent %s reinit\n", __func__, 1850 dev_name(&other_ha->pdev->dev))); 1851 } 1852 } 1853 pci_dev_put(other_pdev); 1854 } 1855 } 1856 1857 /** 1858 * qla4xxx_remove_adapter - calback function to remove adapter. 1859 * @pci_dev: PCI device pointer 1860 **/ 1861 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) 1862 { 1863 struct scsi_qla_host *ha; 1864 1865 ha = pci_get_drvdata(pdev); 1866 1867 if (!is_qla8022(ha)) 1868 qla4xxx_prevent_other_port_reinit(ha); 1869 1870 /* remove devs from iscsi_sessions to scsi_devices */ 1871 qla4xxx_free_ddb_list(ha); 1872 1873 scsi_remove_host(ha->host); 1874 1875 qla4xxx_free_adapter(ha); 1876 1877 scsi_host_put(ha->host); 1878 1879 pci_disable_pcie_error_reporting(pdev); 1880 pci_disable_device(pdev); 1881 pci_set_drvdata(pdev, NULL); 1882 } 1883 1884 /** 1885 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. 1886 * @ha: HA context 1887 * 1888 * At exit, the @ha's flags.enable_64bit_addressing set to indicated 1889 * supported addressing method. 1890 */ 1891 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) 1892 { 1893 int retval; 1894 1895 /* Update our PCI device dma_mask for full 64 bit mask */ 1896 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) { 1897 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) { 1898 dev_dbg(&ha->pdev->dev, 1899 "Failed to set 64 bit PCI consistent mask; " 1900 "using 32 bit.\n"); 1901 retval = pci_set_consistent_dma_mask(ha->pdev, 1902 DMA_BIT_MASK(32)); 1903 } 1904 } else 1905 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32)); 1906 } 1907 1908 static int qla4xxx_slave_alloc(struct scsi_device *sdev) 1909 { 1910 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); 1911 struct ddb_entry *ddb = sess->dd_data; 1912 int queue_depth = QL4_DEF_QDEPTH; 1913 1914 sdev->hostdata = ddb; 1915 sdev->tagged_supported = 1; 1916 1917 if (ql4xmaxqdepth != 0 && ql4xmaxqdepth <= 0xffffU) 1918 queue_depth = ql4xmaxqdepth; 1919 1920 scsi_activate_tcq(sdev, queue_depth); 1921 return 0; 1922 } 1923 1924 static int qla4xxx_slave_configure(struct scsi_device *sdev) 1925 { 1926 sdev->tagged_supported = 1; 1927 return 0; 1928 } 1929 1930 static void qla4xxx_slave_destroy(struct scsi_device *sdev) 1931 { 1932 scsi_deactivate_tcq(sdev, 1); 1933 } 1934 1935 /** 1936 * qla4xxx_del_from_active_array - returns an active srb 1937 * @ha: Pointer to host adapter structure. 1938 * @index: index into the active_array 1939 * 1940 * This routine removes and returns the srb at the specified index 1941 **/ 1942 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha, 1943 uint32_t index) 1944 { 1945 struct srb *srb = NULL; 1946 struct scsi_cmnd *cmd = NULL; 1947 1948 cmd = scsi_host_find_tag(ha->host, index); 1949 if (!cmd) 1950 return srb; 1951 1952 srb = (struct srb *)CMD_SP(cmd); 1953 if (!srb) 1954 return srb; 1955 1956 /* update counters */ 1957 if (srb->flags & SRB_DMA_VALID) { 1958 ha->req_q_count += srb->iocb_cnt; 1959 ha->iocb_cnt -= srb->iocb_cnt; 1960 if (srb->cmd) 1961 srb->cmd->host_scribble = 1962 (unsigned char *)(unsigned long) MAX_SRBS; 1963 } 1964 return srb; 1965 } 1966 1967 /** 1968 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware 1969 * @ha: Pointer to host adapter structure. 1970 * @cmd: Scsi Command to wait on. 1971 * 1972 * This routine waits for the command to be returned by the Firmware 1973 * for some max time. 1974 **/ 1975 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, 1976 struct scsi_cmnd *cmd) 1977 { 1978 int done = 0; 1979 struct srb *rp; 1980 uint32_t max_wait_time = EH_WAIT_CMD_TOV; 1981 int ret = SUCCESS; 1982 1983 /* Dont wait on command if PCI error is being handled 1984 * by PCI AER driver 1985 */ 1986 if (unlikely(pci_channel_offline(ha->pdev)) || 1987 (test_bit(AF_EEH_BUSY, &ha->flags))) { 1988 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n", 1989 ha->host_no, __func__); 1990 return ret; 1991 } 1992 1993 do { 1994 /* Checking to see if its returned to OS */ 1995 rp = (struct srb *) CMD_SP(cmd); 1996 if (rp == NULL) { 1997 done++; 1998 break; 1999 } 2000 2001 msleep(2000); 2002 } while (max_wait_time--); 2003 2004 return done; 2005 } 2006 2007 /** 2008 * qla4xxx_wait_for_hba_online - waits for HBA to come online 2009 * @ha: Pointer to host adapter structure 2010 **/ 2011 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) 2012 { 2013 unsigned long wait_online; 2014 2015 wait_online = jiffies + (HBA_ONLINE_TOV * HZ); 2016 while (time_before(jiffies, wait_online)) { 2017 2018 if (adapter_up(ha)) 2019 return QLA_SUCCESS; 2020 2021 msleep(2000); 2022 } 2023 2024 return QLA_ERROR; 2025 } 2026 2027 /** 2028 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish. 2029 * @ha: pointer to HBA 2030 * @t: target id 2031 * @l: lun id 2032 * 2033 * This function waits for all outstanding commands to a lun to complete. It 2034 * returns 0 if all pending commands are returned and 1 otherwise. 2035 **/ 2036 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha, 2037 struct scsi_target *stgt, 2038 struct scsi_device *sdev) 2039 { 2040 int cnt; 2041 int status = 0; 2042 struct scsi_cmnd *cmd; 2043 2044 /* 2045 * Waiting for all commands for the designated target or dev 2046 * in the active array 2047 */ 2048 for (cnt = 0; cnt < ha->host->can_queue; cnt++) { 2049 cmd = scsi_host_find_tag(ha->host, cnt); 2050 if (cmd && stgt == scsi_target(cmd->device) && 2051 (!sdev || sdev == cmd->device)) { 2052 if (!qla4xxx_eh_wait_on_command(ha, cmd)) { 2053 status++; 2054 break; 2055 } 2056 } 2057 } 2058 return status; 2059 } 2060 2061 /** 2062 * qla4xxx_eh_abort - callback for abort task. 2063 * @cmd: Pointer to Linux's SCSI command structure 2064 * 2065 * This routine is called by the Linux OS to abort the specified 2066 * command. 2067 **/ 2068 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd) 2069 { 2070 struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 2071 unsigned int id = cmd->device->id; 2072 unsigned int lun = cmd->device->lun; 2073 unsigned long flags; 2074 struct srb *srb = NULL; 2075 int ret = SUCCESS; 2076 int wait = 0; 2077 2078 ql4_printk(KERN_INFO, ha, 2079 "scsi%ld:%d:%d: Abort command issued cmd=%p\n", 2080 ha->host_no, id, lun, cmd); 2081 2082 spin_lock_irqsave(&ha->hardware_lock, flags); 2083 srb = (struct srb *) CMD_SP(cmd); 2084 if (!srb) { 2085 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2086 return SUCCESS; 2087 } 2088 kref_get(&srb->srb_ref); 2089 spin_unlock_irqrestore(&ha->hardware_lock, flags); 2090 2091 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) { 2092 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n", 2093 ha->host_no, id, lun)); 2094 ret = FAILED; 2095 } else { 2096 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n", 2097 ha->host_no, id, lun)); 2098 wait = 1; 2099 } 2100 2101 kref_put(&srb->srb_ref, qla4xxx_srb_compl); 2102 2103 /* Wait for command to complete */ 2104 if (wait) { 2105 if (!qla4xxx_eh_wait_on_command(ha, cmd)) { 2106 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n", 2107 ha->host_no, id, lun)); 2108 ret = FAILED; 2109 } 2110 } 2111 2112 ql4_printk(KERN_INFO, ha, 2113 "scsi%ld:%d:%d: Abort command - %s\n", 2114 ha->host_no, id, lun, (ret == SUCCESS) ? "succeeded" : "failed"); 2115 2116 return ret; 2117 } 2118 2119 /** 2120 * qla4xxx_eh_device_reset - callback for target reset. 2121 * @cmd: Pointer to Linux's SCSI command structure 2122 * 2123 * This routine is called by the Linux OS to reset all luns on the 2124 * specified target. 2125 **/ 2126 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) 2127 { 2128 struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 2129 struct ddb_entry *ddb_entry = cmd->device->hostdata; 2130 int ret = FAILED, stat; 2131 2132 if (!ddb_entry) 2133 return ret; 2134 2135 ret = iscsi_block_scsi_eh(cmd); 2136 if (ret) 2137 return ret; 2138 ret = FAILED; 2139 2140 ql4_printk(KERN_INFO, ha, 2141 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, 2142 cmd->device->channel, cmd->device->id, cmd->device->lun); 2143 2144 DEBUG2(printk(KERN_INFO 2145 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," 2146 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, 2147 cmd, jiffies, cmd->request->timeout / HZ, 2148 ha->dpc_flags, cmd->result, cmd->allowed)); 2149 2150 /* FIXME: wait for hba to go online */ 2151 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); 2152 if (stat != QLA_SUCCESS) { 2153 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat); 2154 goto eh_dev_reset_done; 2155 } 2156 2157 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), 2158 cmd->device)) { 2159 ql4_printk(KERN_INFO, ha, 2160 "DEVICE RESET FAILED - waiting for " 2161 "commands.\n"); 2162 goto eh_dev_reset_done; 2163 } 2164 2165 /* Send marker. */ 2166 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, 2167 MM_LUN_RESET) != QLA_SUCCESS) 2168 goto eh_dev_reset_done; 2169 2170 ql4_printk(KERN_INFO, ha, 2171 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", 2172 ha->host_no, cmd->device->channel, cmd->device->id, 2173 cmd->device->lun); 2174 2175 ret = SUCCESS; 2176 2177 eh_dev_reset_done: 2178 2179 return ret; 2180 } 2181 2182 /** 2183 * qla4xxx_eh_target_reset - callback for target reset. 2184 * @cmd: Pointer to Linux's SCSI command structure 2185 * 2186 * This routine is called by the Linux OS to reset the target. 2187 **/ 2188 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd) 2189 { 2190 struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 2191 struct ddb_entry *ddb_entry = cmd->device->hostdata; 2192 int stat, ret; 2193 2194 if (!ddb_entry) 2195 return FAILED; 2196 2197 ret = iscsi_block_scsi_eh(cmd); 2198 if (ret) 2199 return ret; 2200 2201 starget_printk(KERN_INFO, scsi_target(cmd->device), 2202 "WARM TARGET RESET ISSUED.\n"); 2203 2204 DEBUG2(printk(KERN_INFO 2205 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, " 2206 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n", 2207 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ, 2208 ha->dpc_flags, cmd->result, cmd->allowed)); 2209 2210 stat = qla4xxx_reset_target(ha, ddb_entry); 2211 if (stat != QLA_SUCCESS) { 2212 starget_printk(KERN_INFO, scsi_target(cmd->device), 2213 "WARM TARGET RESET FAILED.\n"); 2214 return FAILED; 2215 } 2216 2217 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device), 2218 NULL)) { 2219 starget_printk(KERN_INFO, scsi_target(cmd->device), 2220 "WARM TARGET DEVICE RESET FAILED - " 2221 "waiting for commands.\n"); 2222 return FAILED; 2223 } 2224 2225 /* Send marker. */ 2226 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun, 2227 MM_TGT_WARM_RESET) != QLA_SUCCESS) { 2228 starget_printk(KERN_INFO, scsi_target(cmd->device), 2229 "WARM TARGET DEVICE RESET FAILED - " 2230 "marker iocb failed.\n"); 2231 return FAILED; 2232 } 2233 2234 starget_printk(KERN_INFO, scsi_target(cmd->device), 2235 "WARM TARGET RESET SUCCEEDED.\n"); 2236 return SUCCESS; 2237 } 2238 2239 /** 2240 * qla4xxx_eh_host_reset - kernel callback 2241 * @cmd: Pointer to Linux's SCSI command structure 2242 * 2243 * This routine is invoked by the Linux kernel to perform fatal error 2244 * recovery on the specified adapter. 2245 **/ 2246 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) 2247 { 2248 int return_status = FAILED; 2249 struct scsi_qla_host *ha; 2250 2251 ha = (struct scsi_qla_host *) cmd->device->host->hostdata; 2252 2253 if (ql4xdontresethba) { 2254 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n", 2255 ha->host_no, __func__)); 2256 return FAILED; 2257 } 2258 2259 ql4_printk(KERN_INFO, ha, 2260 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no, 2261 cmd->device->channel, cmd->device->id, cmd->device->lun); 2262 2263 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { 2264 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " 2265 "DEAD.\n", ha->host_no, cmd->device->channel, 2266 __func__)); 2267 2268 return FAILED; 2269 } 2270 2271 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) { 2272 if (is_qla8022(ha)) 2273 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags); 2274 else 2275 set_bit(DPC_RESET_HA, &ha->dpc_flags); 2276 } 2277 2278 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS) 2279 return_status = SUCCESS; 2280 2281 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n", 2282 return_status == FAILED ? "FAILED" : "SUCCEEDED"); 2283 2284 return return_status; 2285 } 2286 2287 /* PCI AER driver recovers from all correctable errors w/o 2288 * driver intervention. For uncorrectable errors PCI AER 2289 * driver calls the following device driver's callbacks 2290 * 2291 * - Fatal Errors - link_reset 2292 * - Non-Fatal Errors - driver's pci_error_detected() which 2293 * returns CAN_RECOVER, NEED_RESET or DISCONNECT. 2294 * 2295 * PCI AER driver calls 2296 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled 2297 * returns RECOVERED or NEED_RESET if fw_hung 2298 * NEED_RESET - driver's slot_reset() 2299 * DISCONNECT - device is dead & cannot recover 2300 * RECOVERED - driver's pci_resume() 2301 */ 2302 static pci_ers_result_t 2303 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state) 2304 { 2305 struct scsi_qla_host *ha = pci_get_drvdata(pdev); 2306 2307 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n", 2308 ha->host_no, __func__, state); 2309 2310 if (!is_aer_supported(ha)) 2311 return PCI_ERS_RESULT_NONE; 2312 2313 switch (state) { 2314 case pci_channel_io_normal: 2315 clear_bit(AF_EEH_BUSY, &ha->flags); 2316 return PCI_ERS_RESULT_CAN_RECOVER; 2317 case pci_channel_io_frozen: 2318 set_bit(AF_EEH_BUSY, &ha->flags); 2319 qla4xxx_mailbox_premature_completion(ha); 2320 qla4xxx_free_irqs(ha); 2321 pci_disable_device(pdev); 2322 /* Return back all IOs */ 2323 qla4xxx_abort_active_cmds(ha, DID_RESET << 16); 2324 return PCI_ERS_RESULT_NEED_RESET; 2325 case pci_channel_io_perm_failure: 2326 set_bit(AF_EEH_BUSY, &ha->flags); 2327 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags); 2328 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16); 2329 return PCI_ERS_RESULT_DISCONNECT; 2330 } 2331 return PCI_ERS_RESULT_NEED_RESET; 2332 } 2333 2334 /** 2335 * qla4xxx_pci_mmio_enabled() gets called if 2336 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER 2337 * and read/write to the device still works. 2338 **/ 2339 static pci_ers_result_t 2340 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev) 2341 { 2342 struct scsi_qla_host *ha = pci_get_drvdata(pdev); 2343 2344 if (!is_aer_supported(ha)) 2345 return PCI_ERS_RESULT_NONE; 2346 2347 return PCI_ERS_RESULT_RECOVERED; 2348 } 2349 2350 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha) 2351 { 2352 uint32_t rval = QLA_ERROR; 2353 uint32_t ret = 0; 2354 int fn; 2355 struct pci_dev *other_pdev = NULL; 2356 2357 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__); 2358 2359 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags); 2360 2361 if (test_bit(AF_ONLINE, &ha->flags)) { 2362 clear_bit(AF_ONLINE, &ha->flags); 2363 qla4xxx_mark_all_devices_missing(ha); 2364 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 2365 } 2366 2367 fn = PCI_FUNC(ha->pdev->devfn); 2368 while (fn > 0) { 2369 fn--; 2370 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at " 2371 "func %x\n", ha->host_no, __func__, fn); 2372 /* Get the pci device given the domain, bus, 2373 * slot/function number */ 2374 other_pdev = 2375 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus), 2376 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn), 2377 fn)); 2378 2379 if (!other_pdev) 2380 continue; 2381 2382 if (atomic_read(&other_pdev->enable_cnt)) { 2383 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI " 2384 "func in enabled state%x\n", ha->host_no, 2385 __func__, fn); 2386 pci_dev_put(other_pdev); 2387 break; 2388 } 2389 pci_dev_put(other_pdev); 2390 } 2391 2392 /* The first function on the card, the reset owner will 2393 * start & initialize the firmware. The other functions 2394 * on the card will reset the firmware context 2395 */ 2396 if (!fn) { 2397 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset " 2398 "0x%x is the owner\n", ha->host_no, __func__, 2399 ha->pdev->devfn); 2400 2401 qla4_8xxx_idc_lock(ha); 2402 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE, 2403 QLA82XX_DEV_COLD); 2404 2405 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION, 2406 QLA82XX_IDC_VERSION); 2407 2408 qla4_8xxx_idc_unlock(ha); 2409 clear_bit(AF_FW_RECOVERY, &ha->flags); 2410 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST); 2411 qla4_8xxx_idc_lock(ha); 2412 2413 if (rval != QLA_SUCCESS) { 2414 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: " 2415 "FAILED\n", ha->host_no, __func__); 2416 qla4_8xxx_clear_drv_active(ha); 2417 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE, 2418 QLA82XX_DEV_FAILED); 2419 } else { 2420 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: " 2421 "READY\n", ha->host_no, __func__); 2422 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE, 2423 QLA82XX_DEV_READY); 2424 /* Clear driver state register */ 2425 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0); 2426 qla4_8xxx_set_drv_active(ha); 2427 ret = qla4xxx_request_irqs(ha); 2428 if (ret) { 2429 ql4_printk(KERN_WARNING, ha, "Failed to " 2430 "reserve interrupt %d already in use.\n", 2431 ha->pdev->irq); 2432 rval = QLA_ERROR; 2433 } else { 2434 ha->isp_ops->enable_intrs(ha); 2435 rval = QLA_SUCCESS; 2436 } 2437 } 2438 qla4_8xxx_idc_unlock(ha); 2439 } else { 2440 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not " 2441 "the reset owner\n", ha->host_no, __func__, 2442 ha->pdev->devfn); 2443 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) == 2444 QLA82XX_DEV_READY)) { 2445 clear_bit(AF_FW_RECOVERY, &ha->flags); 2446 rval = qla4xxx_initialize_adapter(ha, 2447 PRESERVE_DDB_LIST); 2448 if (rval == QLA_SUCCESS) { 2449 ret = qla4xxx_request_irqs(ha); 2450 if (ret) { 2451 ql4_printk(KERN_WARNING, ha, "Failed to" 2452 " reserve interrupt %d already in" 2453 " use.\n", ha->pdev->irq); 2454 rval = QLA_ERROR; 2455 } else { 2456 ha->isp_ops->enable_intrs(ha); 2457 rval = QLA_SUCCESS; 2458 } 2459 } 2460 qla4_8xxx_idc_lock(ha); 2461 qla4_8xxx_set_drv_active(ha); 2462 qla4_8xxx_idc_unlock(ha); 2463 } 2464 } 2465 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags); 2466 return rval; 2467 } 2468 2469 static pci_ers_result_t 2470 qla4xxx_pci_slot_reset(struct pci_dev *pdev) 2471 { 2472 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT; 2473 struct scsi_qla_host *ha = pci_get_drvdata(pdev); 2474 int rc; 2475 2476 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n", 2477 ha->host_no, __func__); 2478 2479 if (!is_aer_supported(ha)) 2480 return PCI_ERS_RESULT_NONE; 2481 2482 /* Restore the saved state of PCIe device - 2483 * BAR registers, PCI Config space, PCIX, MSI, 2484 * IOV states 2485 */ 2486 pci_restore_state(pdev); 2487 2488 /* pci_restore_state() clears the saved_state flag of the device 2489 * save restored state which resets saved_state flag 2490 */ 2491 pci_save_state(pdev); 2492 2493 /* Initialize device or resume if in suspended state */ 2494 rc = pci_enable_device(pdev); 2495 if (rc) { 2496 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Can't re-enable " 2497 "device after reset\n", ha->host_no, __func__); 2498 goto exit_slot_reset; 2499 } 2500 2501 ha->isp_ops->disable_intrs(ha); 2502 2503 if (is_qla8022(ha)) { 2504 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) { 2505 ret = PCI_ERS_RESULT_RECOVERED; 2506 goto exit_slot_reset; 2507 } else 2508 goto exit_slot_reset; 2509 } 2510 2511 exit_slot_reset: 2512 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n" 2513 "device after reset\n", ha->host_no, __func__, ret); 2514 return ret; 2515 } 2516 2517 static void 2518 qla4xxx_pci_resume(struct pci_dev *pdev) 2519 { 2520 struct scsi_qla_host *ha = pci_get_drvdata(pdev); 2521 int ret; 2522 2523 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n", 2524 ha->host_no, __func__); 2525 2526 ret = qla4xxx_wait_for_hba_online(ha); 2527 if (ret != QLA_SUCCESS) { 2528 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to " 2529 "resume I/O from slot/link_reset\n", ha->host_no, 2530 __func__); 2531 } 2532 2533 pci_cleanup_aer_uncorrect_error_status(pdev); 2534 clear_bit(AF_EEH_BUSY, &ha->flags); 2535 } 2536 2537 static struct pci_error_handlers qla4xxx_err_handler = { 2538 .error_detected = qla4xxx_pci_error_detected, 2539 .mmio_enabled = qla4xxx_pci_mmio_enabled, 2540 .slot_reset = qla4xxx_pci_slot_reset, 2541 .resume = qla4xxx_pci_resume, 2542 }; 2543 2544 static struct pci_device_id qla4xxx_pci_tbl[] = { 2545 { 2546 .vendor = PCI_VENDOR_ID_QLOGIC, 2547 .device = PCI_DEVICE_ID_QLOGIC_ISP4010, 2548 .subvendor = PCI_ANY_ID, 2549 .subdevice = PCI_ANY_ID, 2550 }, 2551 { 2552 .vendor = PCI_VENDOR_ID_QLOGIC, 2553 .device = PCI_DEVICE_ID_QLOGIC_ISP4022, 2554 .subvendor = PCI_ANY_ID, 2555 .subdevice = PCI_ANY_ID, 2556 }, 2557 { 2558 .vendor = PCI_VENDOR_ID_QLOGIC, 2559 .device = PCI_DEVICE_ID_QLOGIC_ISP4032, 2560 .subvendor = PCI_ANY_ID, 2561 .subdevice = PCI_ANY_ID, 2562 }, 2563 { 2564 .vendor = PCI_VENDOR_ID_QLOGIC, 2565 .device = PCI_DEVICE_ID_QLOGIC_ISP8022, 2566 .subvendor = PCI_ANY_ID, 2567 .subdevice = PCI_ANY_ID, 2568 }, 2569 {0, 0}, 2570 }; 2571 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); 2572 2573 static struct pci_driver qla4xxx_pci_driver = { 2574 .name = DRIVER_NAME, 2575 .id_table = qla4xxx_pci_tbl, 2576 .probe = qla4xxx_probe_adapter, 2577 .remove = qla4xxx_remove_adapter, 2578 .err_handler = &qla4xxx_err_handler, 2579 }; 2580 2581 static int __init qla4xxx_module_init(void) 2582 { 2583 int ret; 2584 2585 /* Allocate cache for SRBs. */ 2586 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, 2587 SLAB_HWCACHE_ALIGN, NULL); 2588 if (srb_cachep == NULL) { 2589 printk(KERN_ERR 2590 "%s: Unable to allocate SRB cache..." 2591 "Failing load!\n", DRIVER_NAME); 2592 ret = -ENOMEM; 2593 goto no_srp_cache; 2594 } 2595 2596 /* Derive version string. */ 2597 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); 2598 if (ql4xextended_error_logging) 2599 strcat(qla4xxx_version_str, "-debug"); 2600 2601 qla4xxx_scsi_transport = 2602 iscsi_register_transport(&qla4xxx_iscsi_transport); 2603 if (!qla4xxx_scsi_transport){ 2604 ret = -ENODEV; 2605 goto release_srb_cache; 2606 } 2607 2608 ret = pci_register_driver(&qla4xxx_pci_driver); 2609 if (ret) 2610 goto unregister_transport; 2611 2612 printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); 2613 return 0; 2614 2615 unregister_transport: 2616 iscsi_unregister_transport(&qla4xxx_iscsi_transport); 2617 release_srb_cache: 2618 kmem_cache_destroy(srb_cachep); 2619 no_srp_cache: 2620 return ret; 2621 } 2622 2623 static void __exit qla4xxx_module_exit(void) 2624 { 2625 pci_unregister_driver(&qla4xxx_pci_driver); 2626 iscsi_unregister_transport(&qla4xxx_iscsi_transport); 2627 kmem_cache_destroy(srb_cachep); 2628 } 2629 2630 module_init(qla4xxx_module_init); 2631 module_exit(qla4xxx_module_exit); 2632 2633 MODULE_AUTHOR("QLogic Corporation"); 2634 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); 2635 MODULE_LICENSE("GPL"); 2636 MODULE_VERSION(QLA4XXX_DRIVER_VERSION); 2637