1 /* 2 * QLogic iSCSI HBA Driver 3 * Copyright (c) 2003-2006 QLogic Corporation 4 * 5 * See LICENSE.qla4xxx for copyright and licensing details. 6 */ 7 #include <linux/moduleparam.h> 8 9 #include <scsi/scsi_tcq.h> 10 #include <scsi/scsicam.h> 11 12 #include "ql4_def.h" 13 #include "ql4_version.h" 14 #include "ql4_glbl.h" 15 #include "ql4_dbg.h" 16 #include "ql4_inline.h" 17 18 /* 19 * Driver version 20 */ 21 static char qla4xxx_version_str[40]; 22 23 /* 24 * SRB allocation cache 25 */ 26 static struct kmem_cache *srb_cachep; 27 28 /* 29 * Module parameter information and variables 30 */ 31 int ql4xdiscoverywait = 60; 32 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR); 33 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time"); 34 int ql4xdontresethba = 0; 35 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR); 36 MODULE_PARM_DESC(ql4xdontresethba, 37 "Dont reset the HBA when the driver gets 0x8002 AEN " 38 " default it will reset hba :0" 39 " set to 1 to avoid resetting HBA"); 40 41 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */ 42 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR); 43 MODULE_PARM_DESC(ql4xextended_error_logging, 44 "Option to enable extended error logging, " 45 "Default is 0 - no logging, 1 - debug logging"); 46 47 int ql4_mod_unload = 0; 48 49 /* 50 * SCSI host template entry points 51 */ 52 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha); 53 54 /* 55 * iSCSI template entry points 56 */ 57 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 58 enum iscsi_tgt_dscvr type, uint32_t enable, 59 struct sockaddr *dst_addr); 60 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 61 enum iscsi_param param, char *buf); 62 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 63 enum iscsi_param param, char *buf); 64 static int qla4xxx_host_get_param(struct Scsi_Host *shost, 65 enum iscsi_host_param param, char *buf); 66 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag); 67 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn); 68 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session); 69 70 /* 71 * SCSI host template entry points 72 */ 73 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, 74 void (*done) (struct scsi_cmnd *)); 75 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd); 76 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd); 77 static int qla4xxx_slave_alloc(struct scsi_device *device); 78 static int qla4xxx_slave_configure(struct scsi_device *device); 79 static void qla4xxx_slave_destroy(struct scsi_device *sdev); 80 81 static struct scsi_host_template qla4xxx_driver_template = { 82 .module = THIS_MODULE, 83 .name = DRIVER_NAME, 84 .proc_name = DRIVER_NAME, 85 .queuecommand = qla4xxx_queuecommand, 86 87 .eh_device_reset_handler = qla4xxx_eh_device_reset, 88 .eh_host_reset_handler = qla4xxx_eh_host_reset, 89 90 .slave_configure = qla4xxx_slave_configure, 91 .slave_alloc = qla4xxx_slave_alloc, 92 .slave_destroy = qla4xxx_slave_destroy, 93 94 .this_id = -1, 95 .cmd_per_lun = 3, 96 .use_clustering = ENABLE_CLUSTERING, 97 .use_sg_chaining = ENABLE_SG_CHAINING, 98 .sg_tablesize = SG_ALL, 99 100 .max_sectors = 0xFFFF, 101 }; 102 103 static struct iscsi_transport qla4xxx_iscsi_transport = { 104 .owner = THIS_MODULE, 105 .name = DRIVER_NAME, 106 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD | 107 CAP_DATA_PATH_OFFLOAD, 108 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS | 109 ISCSI_TARGET_NAME | ISCSI_TPGT, 110 .host_param_mask = ISCSI_HOST_HWADDRESS | 111 ISCSI_HOST_IPADDRESS | 112 ISCSI_HOST_INITIATOR_NAME, 113 .sessiondata_size = sizeof(struct ddb_entry), 114 .host_template = &qla4xxx_driver_template, 115 116 .tgt_dscvr = qla4xxx_tgt_dscvr, 117 .get_conn_param = qla4xxx_conn_get_param, 118 .get_session_param = qla4xxx_sess_get_param, 119 .get_host_param = qla4xxx_host_get_param, 120 .start_conn = qla4xxx_conn_start, 121 .stop_conn = qla4xxx_conn_stop, 122 .session_recovery_timedout = qla4xxx_recovery_timedout, 123 }; 124 125 static struct scsi_transport_template *qla4xxx_scsi_transport; 126 127 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session) 128 { 129 struct ddb_entry *ddb_entry = session->dd_data; 130 struct scsi_qla_host *ha = ddb_entry->ha; 131 132 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) " 133 "secs exhausted, marking device DEAD.\n", ha->host_no, 134 __func__, ddb_entry->fw_ddb_index, 135 ha->port_down_retry_count)); 136 137 atomic_set(&ddb_entry->state, DDB_STATE_DEAD); 138 139 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = " 140 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags)); 141 queue_work(ha->dpc_thread, &ha->dpc_work); 142 } 143 144 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn) 145 { 146 struct iscsi_cls_session *session; 147 struct ddb_entry *ddb_entry; 148 149 session = iscsi_dev_to_session(conn->dev.parent); 150 ddb_entry = session->dd_data; 151 152 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n", 153 ddb_entry->ha->host_no, __func__, 154 ddb_entry->fw_ddb_index)); 155 iscsi_unblock_session(session); 156 return 0; 157 } 158 159 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag) 160 { 161 struct iscsi_cls_session *session; 162 struct ddb_entry *ddb_entry; 163 164 session = iscsi_dev_to_session(conn->dev.parent); 165 ddb_entry = session->dd_data; 166 167 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n", 168 ddb_entry->ha->host_no, __func__, 169 ddb_entry->fw_ddb_index)); 170 if (flag == STOP_CONN_RECOVER) 171 iscsi_block_session(session); 172 else 173 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag); 174 } 175 176 static ssize_t format_addr(char *buf, const unsigned char *addr, int len) 177 { 178 int i; 179 char *cp = buf; 180 181 for (i = 0; i < len; i++) 182 cp += sprintf(cp, "%02x%c", addr[i], 183 i == (len - 1) ? '\n' : ':'); 184 return cp - buf; 185 } 186 187 188 static int qla4xxx_host_get_param(struct Scsi_Host *shost, 189 enum iscsi_host_param param, char *buf) 190 { 191 struct scsi_qla_host *ha = to_qla_host(shost); 192 int len; 193 194 switch (param) { 195 case ISCSI_HOST_PARAM_HWADDRESS: 196 len = format_addr(buf, ha->my_mac, MAC_ADDR_LEN); 197 break; 198 case ISCSI_HOST_PARAM_IPADDRESS: 199 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0], 200 ha->ip_address[1], ha->ip_address[2], 201 ha->ip_address[3]); 202 break; 203 case ISCSI_HOST_PARAM_INITIATOR_NAME: 204 len = sprintf(buf, "%s\n", ha->name_string); 205 break; 206 default: 207 return -ENOSYS; 208 } 209 210 return len; 211 } 212 213 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess, 214 enum iscsi_param param, char *buf) 215 { 216 struct ddb_entry *ddb_entry = sess->dd_data; 217 int len; 218 219 switch (param) { 220 case ISCSI_PARAM_TARGET_NAME: 221 len = snprintf(buf, PAGE_SIZE - 1, "%s\n", 222 ddb_entry->iscsi_name); 223 break; 224 case ISCSI_PARAM_TPGT: 225 len = sprintf(buf, "%u\n", ddb_entry->tpgt); 226 break; 227 default: 228 return -ENOSYS; 229 } 230 231 return len; 232 } 233 234 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn, 235 enum iscsi_param param, char *buf) 236 { 237 struct iscsi_cls_session *session; 238 struct ddb_entry *ddb_entry; 239 int len; 240 241 session = iscsi_dev_to_session(conn->dev.parent); 242 ddb_entry = session->dd_data; 243 244 switch (param) { 245 case ISCSI_PARAM_CONN_PORT: 246 len = sprintf(buf, "%hu\n", ddb_entry->port); 247 break; 248 case ISCSI_PARAM_CONN_ADDRESS: 249 /* TODO: what are the ipv6 bits */ 250 len = sprintf(buf, "%u.%u.%u.%u\n", 251 NIPQUAD(ddb_entry->ip_addr)); 252 break; 253 default: 254 return -ENOSYS; 255 } 256 257 return len; 258 } 259 260 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost, 261 enum iscsi_tgt_dscvr type, uint32_t enable, 262 struct sockaddr *dst_addr) 263 { 264 struct scsi_qla_host *ha; 265 struct sockaddr_in *addr; 266 struct sockaddr_in6 *addr6; 267 int ret = 0; 268 269 ha = (struct scsi_qla_host *) shost->hostdata; 270 271 switch (type) { 272 case ISCSI_TGT_DSCVR_SEND_TARGETS: 273 if (dst_addr->sa_family == AF_INET) { 274 addr = (struct sockaddr_in *)dst_addr; 275 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr, 276 addr->sin_port) != QLA_SUCCESS) 277 ret = -EIO; 278 } else if (dst_addr->sa_family == AF_INET6) { 279 /* 280 * TODO: fix qla4xxx_send_tgts 281 */ 282 addr6 = (struct sockaddr_in6 *)dst_addr; 283 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr, 284 addr6->sin6_port) != QLA_SUCCESS) 285 ret = -EIO; 286 } else 287 ret = -ENOSYS; 288 break; 289 default: 290 ret = -ENOSYS; 291 } 292 return ret; 293 } 294 295 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry) 296 { 297 if (!ddb_entry->sess) 298 return; 299 300 if (ddb_entry->conn) { 301 iscsi_if_destroy_session_done(ddb_entry->conn); 302 iscsi_destroy_conn(ddb_entry->conn); 303 iscsi_remove_session(ddb_entry->sess); 304 } 305 iscsi_free_session(ddb_entry->sess); 306 } 307 308 int qla4xxx_add_sess(struct ddb_entry *ddb_entry) 309 { 310 int err; 311 312 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index); 313 if (err) { 314 DEBUG2(printk(KERN_ERR "Could not add session.\n")); 315 return err; 316 } 317 318 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0); 319 if (!ddb_entry->conn) { 320 iscsi_remove_session(ddb_entry->sess); 321 DEBUG2(printk(KERN_ERR "Could not add connection.\n")); 322 return -ENOMEM; 323 } 324 325 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count; 326 iscsi_if_create_session_done(ddb_entry->conn); 327 return 0; 328 } 329 330 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha) 331 { 332 struct ddb_entry *ddb_entry; 333 struct iscsi_cls_session *sess; 334 335 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport); 336 if (!sess) 337 return NULL; 338 339 ddb_entry = sess->dd_data; 340 memset(ddb_entry, 0, sizeof(*ddb_entry)); 341 ddb_entry->ha = ha; 342 ddb_entry->sess = sess; 343 return ddb_entry; 344 } 345 346 /* 347 * Timer routines 348 */ 349 350 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func, 351 unsigned long interval) 352 { 353 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n", 354 __func__, ha->host->host_no)); 355 init_timer(&ha->timer); 356 ha->timer.expires = jiffies + interval * HZ; 357 ha->timer.data = (unsigned long)ha; 358 ha->timer.function = (void (*)(unsigned long))func; 359 add_timer(&ha->timer); 360 ha->timer_active = 1; 361 } 362 363 static void qla4xxx_stop_timer(struct scsi_qla_host *ha) 364 { 365 del_timer_sync(&ha->timer); 366 ha->timer_active = 0; 367 } 368 369 /*** 370 * qla4xxx_mark_device_missing - mark a device as missing. 371 * @ha: Pointer to host adapter structure. 372 * @ddb_entry: Pointer to device database entry 373 * 374 * This routine marks a device missing and resets the relogin retry count. 375 **/ 376 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha, 377 struct ddb_entry *ddb_entry) 378 { 379 atomic_set(&ddb_entry->state, DDB_STATE_MISSING); 380 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n", 381 ha->host_no, ddb_entry->bus, ddb_entry->target, 382 ddb_entry->fw_ddb_index)); 383 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED); 384 } 385 386 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha, 387 struct ddb_entry *ddb_entry, 388 struct scsi_cmnd *cmd, 389 void (*done)(struct scsi_cmnd *)) 390 { 391 struct srb *srb; 392 393 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC); 394 if (!srb) 395 return srb; 396 397 atomic_set(&srb->ref_count, 1); 398 srb->ha = ha; 399 srb->ddb = ddb_entry; 400 srb->cmd = cmd; 401 srb->flags = 0; 402 cmd->SCp.ptr = (void *)srb; 403 cmd->scsi_done = done; 404 405 return srb; 406 } 407 408 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb) 409 { 410 struct scsi_cmnd *cmd = srb->cmd; 411 412 if (srb->flags & SRB_DMA_VALID) { 413 scsi_dma_unmap(cmd); 414 srb->flags &= ~SRB_DMA_VALID; 415 } 416 cmd->SCp.ptr = NULL; 417 } 418 419 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb) 420 { 421 struct scsi_cmnd *cmd = srb->cmd; 422 423 qla4xxx_srb_free_dma(ha, srb); 424 425 mempool_free(srb, ha->srb_mempool); 426 427 cmd->scsi_done(cmd); 428 } 429 430 /** 431 * qla4xxx_queuecommand - scsi layer issues scsi command to driver. 432 * @cmd: Pointer to Linux's SCSI command structure 433 * @done_fn: Function that the driver calls to notify the SCSI mid-layer 434 * that the command has been processed. 435 * 436 * Remarks: 437 * This routine is invoked by Linux to send a SCSI command to the driver. 438 * The mid-level driver tries to ensure that queuecommand never gets 439 * invoked concurrently with itself or the interrupt handler (although 440 * the interrupt handler may call this routine as part of request- 441 * completion handling). Unfortunely, it sometimes calls the scheduler 442 * in interrupt context which is a big NO! NO!. 443 **/ 444 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd, 445 void (*done)(struct scsi_cmnd *)) 446 { 447 struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 448 struct ddb_entry *ddb_entry = cmd->device->hostdata; 449 struct srb *srb; 450 int rval; 451 452 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 453 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) { 454 cmd->result = DID_NO_CONNECT << 16; 455 goto qc_fail_command; 456 } 457 goto qc_host_busy; 458 } 459 460 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) 461 goto qc_host_busy; 462 463 spin_unlock_irq(ha->host->host_lock); 464 465 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done); 466 if (!srb) 467 goto qc_host_busy_lock; 468 469 rval = qla4xxx_send_command_to_isp(ha, srb); 470 if (rval != QLA_SUCCESS) 471 goto qc_host_busy_free_sp; 472 473 spin_lock_irq(ha->host->host_lock); 474 return 0; 475 476 qc_host_busy_free_sp: 477 qla4xxx_srb_free_dma(ha, srb); 478 mempool_free(srb, ha->srb_mempool); 479 480 qc_host_busy_lock: 481 spin_lock_irq(ha->host->host_lock); 482 483 qc_host_busy: 484 return SCSI_MLQUEUE_HOST_BUSY; 485 486 qc_fail_command: 487 done(cmd); 488 489 return 0; 490 } 491 492 /** 493 * qla4xxx_mem_free - frees memory allocated to adapter 494 * @ha: Pointer to host adapter structure. 495 * 496 * Frees memory previously allocated by qla4xxx_mem_alloc 497 **/ 498 static void qla4xxx_mem_free(struct scsi_qla_host *ha) 499 { 500 if (ha->queues) 501 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues, 502 ha->queues_dma); 503 504 ha->queues_len = 0; 505 ha->queues = NULL; 506 ha->queues_dma = 0; 507 ha->request_ring = NULL; 508 ha->request_dma = 0; 509 ha->response_ring = NULL; 510 ha->response_dma = 0; 511 ha->shadow_regs = NULL; 512 ha->shadow_regs_dma = 0; 513 514 /* Free srb pool. */ 515 if (ha->srb_mempool) 516 mempool_destroy(ha->srb_mempool); 517 518 ha->srb_mempool = NULL; 519 520 /* release io space registers */ 521 if (ha->reg) 522 iounmap(ha->reg); 523 pci_release_regions(ha->pdev); 524 } 525 526 /** 527 * qla4xxx_mem_alloc - allocates memory for use by adapter. 528 * @ha: Pointer to host adapter structure 529 * 530 * Allocates DMA memory for request and response queues. Also allocates memory 531 * for srbs. 532 **/ 533 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha) 534 { 535 unsigned long align; 536 537 /* Allocate contiguous block of DMA memory for queues. */ 538 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 539 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) + 540 sizeof(struct shadow_regs) + 541 MEM_ALIGN_VALUE + 542 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1); 543 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len, 544 &ha->queues_dma, GFP_KERNEL); 545 if (ha->queues == NULL) { 546 dev_warn(&ha->pdev->dev, 547 "Memory Allocation failed - queues.\n"); 548 549 goto mem_alloc_error_exit; 550 } 551 memset(ha->queues, 0, ha->queues_len); 552 553 /* 554 * As per RISC alignment requirements -- the bus-address must be a 555 * multiple of the request-ring size (in bytes). 556 */ 557 align = 0; 558 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1)) 559 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma & 560 (MEM_ALIGN_VALUE - 1)); 561 562 /* Update request and response queue pointers. */ 563 ha->request_dma = ha->queues_dma + align; 564 ha->request_ring = (struct queue_entry *) (ha->queues + align); 565 ha->response_dma = ha->queues_dma + align + 566 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE); 567 ha->response_ring = (struct queue_entry *) (ha->queues + align + 568 (REQUEST_QUEUE_DEPTH * 569 QUEUE_SIZE)); 570 ha->shadow_regs_dma = ha->queues_dma + align + 571 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) + 572 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE); 573 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align + 574 (REQUEST_QUEUE_DEPTH * 575 QUEUE_SIZE) + 576 (RESPONSE_QUEUE_DEPTH * 577 QUEUE_SIZE)); 578 579 /* Allocate memory for srb pool. */ 580 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab, 581 mempool_free_slab, srb_cachep); 582 if (ha->srb_mempool == NULL) { 583 dev_warn(&ha->pdev->dev, 584 "Memory Allocation failed - SRB Pool.\n"); 585 586 goto mem_alloc_error_exit; 587 } 588 589 return QLA_SUCCESS; 590 591 mem_alloc_error_exit: 592 qla4xxx_mem_free(ha); 593 return QLA_ERROR; 594 } 595 596 /** 597 * qla4xxx_timer - checks every second for work to do. 598 * @ha: Pointer to host adapter structure. 599 **/ 600 static void qla4xxx_timer(struct scsi_qla_host *ha) 601 { 602 struct ddb_entry *ddb_entry, *dtemp; 603 int start_dpc = 0; 604 605 /* Search for relogin's to time-out and port down retry. */ 606 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) { 607 /* Count down time between sending relogins */ 608 if (adapter_up(ha) && 609 !test_bit(DF_RELOGIN, &ddb_entry->flags) && 610 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) { 611 if (atomic_read(&ddb_entry->retry_relogin_timer) != 612 INVALID_ENTRY) { 613 if (atomic_read(&ddb_entry->retry_relogin_timer) 614 == 0) { 615 atomic_set(&ddb_entry-> 616 retry_relogin_timer, 617 INVALID_ENTRY); 618 set_bit(DPC_RELOGIN_DEVICE, 619 &ha->dpc_flags); 620 set_bit(DF_RELOGIN, &ddb_entry->flags); 621 DEBUG2(printk("scsi%ld: %s: index [%d]" 622 " login device\n", 623 ha->host_no, __func__, 624 ddb_entry->fw_ddb_index)); 625 } else 626 atomic_dec(&ddb_entry-> 627 retry_relogin_timer); 628 } 629 } 630 631 /* Wait for relogin to timeout */ 632 if (atomic_read(&ddb_entry->relogin_timer) && 633 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) { 634 /* 635 * If the relogin times out and the device is 636 * still NOT ONLINE then try and relogin again. 637 */ 638 if (atomic_read(&ddb_entry->state) != 639 DDB_STATE_ONLINE && 640 ddb_entry->fw_ddb_device_state == 641 DDB_DS_SESSION_FAILED) { 642 /* Reset retry relogin timer */ 643 atomic_inc(&ddb_entry->relogin_retry_count); 644 DEBUG2(printk("scsi%ld: index[%d] relogin" 645 " timed out-retrying" 646 " relogin (%d)\n", 647 ha->host_no, 648 ddb_entry->fw_ddb_index, 649 atomic_read(&ddb_entry-> 650 relogin_retry_count)) 651 ); 652 start_dpc++; 653 DEBUG(printk("scsi%ld:%d:%d: index [%d] " 654 "initate relogin after" 655 " %d seconds\n", 656 ha->host_no, ddb_entry->bus, 657 ddb_entry->target, 658 ddb_entry->fw_ddb_index, 659 ddb_entry->default_time2wait + 4) 660 ); 661 662 atomic_set(&ddb_entry->retry_relogin_timer, 663 ddb_entry->default_time2wait + 4); 664 } 665 } 666 } 667 668 /* Check for heartbeat interval. */ 669 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE && 670 ha->heartbeat_interval != 0) { 671 ha->seconds_since_last_heartbeat++; 672 if (ha->seconds_since_last_heartbeat > 673 ha->heartbeat_interval + 2) 674 set_bit(DPC_RESET_HA, &ha->dpc_flags); 675 } 676 677 678 /* Wakeup the dpc routine for this adapter, if needed. */ 679 if ((start_dpc || 680 test_bit(DPC_RESET_HA, &ha->dpc_flags) || 681 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) || 682 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) || 683 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || 684 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 685 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) || 686 test_bit(DPC_AEN, &ha->dpc_flags)) && 687 ha->dpc_thread) { 688 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine" 689 " - dpc flags = 0x%lx\n", 690 ha->host_no, __func__, ha->dpc_flags)); 691 queue_work(ha->dpc_thread, &ha->dpc_work); 692 } 693 694 /* Reschedule timer thread to call us back in one second */ 695 mod_timer(&ha->timer, jiffies + HZ); 696 697 DEBUG2(ha->seconds_since_last_intr++); 698 } 699 700 /** 701 * qla4xxx_cmd_wait - waits for all outstanding commands to complete 702 * @ha: Pointer to host adapter structure. 703 * 704 * This routine stalls the driver until all outstanding commands are returned. 705 * Caller must release the Hardware Lock prior to calling this routine. 706 **/ 707 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha) 708 { 709 uint32_t index = 0; 710 int stat = QLA_SUCCESS; 711 unsigned long flags; 712 struct scsi_cmnd *cmd; 713 int wait_cnt = WAIT_CMD_TOV; /* 714 * Initialized for 30 seconds as we 715 * expect all commands to retuned 716 * ASAP. 717 */ 718 719 while (wait_cnt) { 720 spin_lock_irqsave(&ha->hardware_lock, flags); 721 /* Find a command that hasn't completed. */ 722 for (index = 0; index < ha->host->can_queue; index++) { 723 cmd = scsi_host_find_tag(ha->host, index); 724 if (cmd != NULL) 725 break; 726 } 727 spin_unlock_irqrestore(&ha->hardware_lock, flags); 728 729 /* If No Commands are pending, wait is complete */ 730 if (index == ha->host->can_queue) { 731 break; 732 } 733 734 /* If we timed out on waiting for commands to come back 735 * return ERROR. 736 */ 737 wait_cnt--; 738 if (wait_cnt == 0) 739 stat = QLA_ERROR; 740 else { 741 msleep(1000); 742 } 743 } /* End of While (wait_cnt) */ 744 745 return stat; 746 } 747 748 void qla4xxx_hw_reset(struct scsi_qla_host *ha) 749 { 750 uint32_t ctrl_status; 751 unsigned long flags = 0; 752 753 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__)); 754 755 spin_lock_irqsave(&ha->hardware_lock, flags); 756 757 /* 758 * If the SCSI Reset Interrupt bit is set, clear it. 759 * Otherwise, the Soft Reset won't work. 760 */ 761 ctrl_status = readw(&ha->reg->ctrl_status); 762 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) 763 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 764 765 /* Issue Soft Reset */ 766 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status); 767 readl(&ha->reg->ctrl_status); 768 769 spin_unlock_irqrestore(&ha->hardware_lock, flags); 770 } 771 772 /** 773 * qla4xxx_soft_reset - performs soft reset. 774 * @ha: Pointer to host adapter structure. 775 **/ 776 int qla4xxx_soft_reset(struct scsi_qla_host *ha) 777 { 778 uint32_t max_wait_time; 779 unsigned long flags = 0; 780 int status = QLA_ERROR; 781 uint32_t ctrl_status; 782 783 qla4xxx_hw_reset(ha); 784 785 /* Wait until the Network Reset Intr bit is cleared */ 786 max_wait_time = RESET_INTR_TOV; 787 do { 788 spin_lock_irqsave(&ha->hardware_lock, flags); 789 ctrl_status = readw(&ha->reg->ctrl_status); 790 spin_unlock_irqrestore(&ha->hardware_lock, flags); 791 792 if ((ctrl_status & CSR_NET_RESET_INTR) == 0) 793 break; 794 795 msleep(1000); 796 } while ((--max_wait_time)); 797 798 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) { 799 DEBUG2(printk(KERN_WARNING 800 "scsi%ld: Network Reset Intr not cleared by " 801 "Network function, clearing it now!\n", 802 ha->host_no)); 803 spin_lock_irqsave(&ha->hardware_lock, flags); 804 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status); 805 readl(&ha->reg->ctrl_status); 806 spin_unlock_irqrestore(&ha->hardware_lock, flags); 807 } 808 809 /* Wait until the firmware tells us the Soft Reset is done */ 810 max_wait_time = SOFT_RESET_TOV; 811 do { 812 spin_lock_irqsave(&ha->hardware_lock, flags); 813 ctrl_status = readw(&ha->reg->ctrl_status); 814 spin_unlock_irqrestore(&ha->hardware_lock, flags); 815 816 if ((ctrl_status & CSR_SOFT_RESET) == 0) { 817 status = QLA_SUCCESS; 818 break; 819 } 820 821 msleep(1000); 822 } while ((--max_wait_time)); 823 824 /* 825 * Also, make sure that the SCSI Reset Interrupt bit has been cleared 826 * after the soft reset has taken place. 827 */ 828 spin_lock_irqsave(&ha->hardware_lock, flags); 829 ctrl_status = readw(&ha->reg->ctrl_status); 830 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) { 831 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status); 832 readl(&ha->reg->ctrl_status); 833 } 834 spin_unlock_irqrestore(&ha->hardware_lock, flags); 835 836 /* If soft reset fails then most probably the bios on other 837 * function is also enabled. 838 * Since the initialization is sequential the other fn 839 * wont be able to acknowledge the soft reset. 840 * Issue a force soft reset to workaround this scenario. 841 */ 842 if (max_wait_time == 0) { 843 /* Issue Force Soft Reset */ 844 spin_lock_irqsave(&ha->hardware_lock, flags); 845 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status); 846 readl(&ha->reg->ctrl_status); 847 spin_unlock_irqrestore(&ha->hardware_lock, flags); 848 /* Wait until the firmware tells us the Soft Reset is done */ 849 max_wait_time = SOFT_RESET_TOV; 850 do { 851 spin_lock_irqsave(&ha->hardware_lock, flags); 852 ctrl_status = readw(&ha->reg->ctrl_status); 853 spin_unlock_irqrestore(&ha->hardware_lock, flags); 854 855 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) { 856 status = QLA_SUCCESS; 857 break; 858 } 859 860 msleep(1000); 861 } while ((--max_wait_time)); 862 } 863 864 return status; 865 } 866 867 /** 868 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S. 869 * @ha: Pointer to host adapter structure. 870 * 871 * This routine is called just prior to a HARD RESET to return all 872 * outstanding commands back to the Operating System. 873 * Caller should make sure that the following locks are released 874 * before this calling routine: Hardware lock, and io_request_lock. 875 **/ 876 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha) 877 { 878 struct srb *srb; 879 int i; 880 unsigned long flags; 881 882 spin_lock_irqsave(&ha->hardware_lock, flags); 883 for (i = 0; i < ha->host->can_queue; i++) { 884 srb = qla4xxx_del_from_active_array(ha, i); 885 if (srb != NULL) { 886 srb->cmd->result = DID_RESET << 16; 887 qla4xxx_srb_compl(ha, srb); 888 } 889 } 890 spin_unlock_irqrestore(&ha->hardware_lock, flags); 891 892 } 893 894 /** 895 * qla4xxx_recover_adapter - recovers adapter after a fatal error 896 * @ha: Pointer to host adapter structure. 897 * @renew_ddb_list: Indicates what to do with the adapter's ddb list 898 * after adapter recovery has completed. 899 * 0=preserve ddb list, 1=destroy and rebuild ddb list 900 **/ 901 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha, 902 uint8_t renew_ddb_list) 903 { 904 int status; 905 906 /* Stall incoming I/O until we are done */ 907 clear_bit(AF_ONLINE, &ha->flags); 908 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no, 909 __func__)); 910 911 /* Wait for outstanding commands to complete. 912 * Stalls the driver for max 30 secs 913 */ 914 status = qla4xxx_cmd_wait(ha); 915 916 qla4xxx_disable_intrs(ha); 917 918 /* Flush any pending ddb changed AENs */ 919 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 920 921 /* Reset the firmware. If successful, function 922 * returns with ISP interrupts enabled. 923 */ 924 if (status == QLA_SUCCESS) { 925 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n", 926 ha->host_no, __func__)); 927 qla4xxx_flush_active_srbs(ha); 928 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) 929 status = qla4xxx_soft_reset(ha); 930 else 931 status = QLA_ERROR; 932 } 933 934 /* Flush any pending ddb changed AENs */ 935 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 936 937 /* Re-initialize firmware. If successful, function returns 938 * with ISP interrupts enabled */ 939 if (status == QLA_SUCCESS) { 940 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n", 941 ha->host_no, __func__)); 942 943 /* If successful, AF_ONLINE flag set in 944 * qla4xxx_initialize_adapter */ 945 status = qla4xxx_initialize_adapter(ha, renew_ddb_list); 946 } 947 948 /* Failed adapter initialization? 949 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */ 950 if ((test_bit(AF_ONLINE, &ha->flags) == 0) && 951 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) { 952 /* Adapter initialization failed, see if we can retry 953 * resetting the ha */ 954 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) { 955 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES; 956 DEBUG2(printk("scsi%ld: recover adapter - retrying " 957 "(%d) more times\n", ha->host_no, 958 ha->retry_reset_ha_cnt)); 959 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 960 status = QLA_ERROR; 961 } else { 962 if (ha->retry_reset_ha_cnt > 0) { 963 /* Schedule another Reset HA--DPC will retry */ 964 ha->retry_reset_ha_cnt--; 965 DEBUG2(printk("scsi%ld: recover adapter - " 966 "retry remaining %d\n", 967 ha->host_no, 968 ha->retry_reset_ha_cnt)); 969 status = QLA_ERROR; 970 } 971 972 if (ha->retry_reset_ha_cnt == 0) { 973 /* Recover adapter retries have been exhausted. 974 * Adapter DEAD */ 975 DEBUG2(printk("scsi%ld: recover adapter " 976 "failed - board disabled\n", 977 ha->host_no)); 978 qla4xxx_flush_active_srbs(ha); 979 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 980 clear_bit(DPC_RESET_HA, &ha->dpc_flags); 981 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, 982 &ha->dpc_flags); 983 status = QLA_ERROR; 984 } 985 } 986 } else { 987 clear_bit(DPC_RESET_HA, &ha->dpc_flags); 988 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags); 989 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags); 990 } 991 992 ha->adapter_error_count++; 993 994 if (status == QLA_SUCCESS) 995 qla4xxx_enable_intrs(ha); 996 997 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no)); 998 return status; 999 } 1000 1001 /** 1002 * qla4xxx_do_dpc - dpc routine 1003 * @data: in our case pointer to adapter structure 1004 * 1005 * This routine is a task that is schedule by the interrupt handler 1006 * to perform the background processing for interrupts. We put it 1007 * on a task queue that is consumed whenever the scheduler runs; that's 1008 * so you can do anything (i.e. put the process to sleep etc). In fact, 1009 * the mid-level tries to sleep when it reaches the driver threshold 1010 * "host->can_queue". This can cause a panic if we were in our interrupt code. 1011 **/ 1012 static void qla4xxx_do_dpc(struct work_struct *work) 1013 { 1014 struct scsi_qla_host *ha = 1015 container_of(work, struct scsi_qla_host, dpc_work); 1016 struct ddb_entry *ddb_entry, *dtemp; 1017 int status = QLA_ERROR; 1018 1019 DEBUG2(printk("scsi%ld: %s: DPC handler waking up." 1020 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n", 1021 ha->host_no, __func__, ha->flags, ha->dpc_flags, 1022 readw(&ha->reg->ctrl_status))); 1023 1024 /* Initialization not yet finished. Don't do anything yet. */ 1025 if (!test_bit(AF_INIT_DONE, &ha->flags)) 1026 return; 1027 1028 if (adapter_up(ha) || 1029 test_bit(DPC_RESET_HA, &ha->dpc_flags) || 1030 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) || 1031 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) { 1032 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) || 1033 test_bit(DPC_RESET_HA, &ha->dpc_flags)) 1034 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST); 1035 1036 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) { 1037 uint8_t wait_time = RESET_INTR_TOV; 1038 1039 while ((readw(&ha->reg->ctrl_status) & 1040 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) { 1041 if (--wait_time == 0) 1042 break; 1043 msleep(1000); 1044 } 1045 if (wait_time == 0) 1046 DEBUG2(printk("scsi%ld: %s: SR|FSR " 1047 "bit not cleared-- resetting\n", 1048 ha->host_no, __func__)); 1049 qla4xxx_flush_active_srbs(ha); 1050 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) { 1051 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS); 1052 status = qla4xxx_initialize_adapter(ha, 1053 PRESERVE_DDB_LIST); 1054 } 1055 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags); 1056 if (status == QLA_SUCCESS) 1057 qla4xxx_enable_intrs(ha); 1058 } 1059 } 1060 1061 /* ---- process AEN? --- */ 1062 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags)) 1063 qla4xxx_process_aen(ha, PROCESS_ALL_AENS); 1064 1065 /* ---- Get DHCP IP Address? --- */ 1066 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags)) 1067 qla4xxx_get_dhcp_ip_address(ha); 1068 1069 /* ---- relogin device? --- */ 1070 if (adapter_up(ha) && 1071 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) { 1072 list_for_each_entry_safe(ddb_entry, dtemp, 1073 &ha->ddb_list, list) { 1074 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) && 1075 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) 1076 qla4xxx_relogin_device(ha, ddb_entry); 1077 1078 /* 1079 * If mbx cmd times out there is no point 1080 * in continuing further. 1081 * With large no of targets this can hang 1082 * the system. 1083 */ 1084 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) { 1085 printk(KERN_WARNING "scsi%ld: %s: " 1086 "need to reset hba\n", 1087 ha->host_no, __func__); 1088 break; 1089 } 1090 } 1091 } 1092 } 1093 1094 /** 1095 * qla4xxx_free_adapter - release the adapter 1096 * @ha: pointer to adapter structure 1097 **/ 1098 static void qla4xxx_free_adapter(struct scsi_qla_host *ha) 1099 { 1100 1101 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) { 1102 /* Turn-off interrupts on the card. */ 1103 qla4xxx_disable_intrs(ha); 1104 } 1105 1106 /* Kill the kernel thread for this host */ 1107 if (ha->dpc_thread) 1108 destroy_workqueue(ha->dpc_thread); 1109 1110 /* Issue Soft Reset to put firmware in unknown state */ 1111 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) 1112 qla4xxx_hw_reset(ha); 1113 1114 /* Remove timer thread, if present */ 1115 if (ha->timer_active) 1116 qla4xxx_stop_timer(ha); 1117 1118 /* Detach interrupts */ 1119 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags)) 1120 free_irq(ha->pdev->irq, ha); 1121 1122 /* free extra memory */ 1123 qla4xxx_mem_free(ha); 1124 1125 pci_disable_device(ha->pdev); 1126 1127 } 1128 1129 /*** 1130 * qla4xxx_iospace_config - maps registers 1131 * @ha: pointer to adapter structure 1132 * 1133 * This routines maps HBA's registers from the pci address space 1134 * into the kernel virtual address space for memory mapped i/o. 1135 **/ 1136 static int qla4xxx_iospace_config(struct scsi_qla_host *ha) 1137 { 1138 unsigned long pio, pio_len, pio_flags; 1139 unsigned long mmio, mmio_len, mmio_flags; 1140 1141 pio = pci_resource_start(ha->pdev, 0); 1142 pio_len = pci_resource_len(ha->pdev, 0); 1143 pio_flags = pci_resource_flags(ha->pdev, 0); 1144 if (pio_flags & IORESOURCE_IO) { 1145 if (pio_len < MIN_IOBASE_LEN) { 1146 dev_warn(&ha->pdev->dev, 1147 "Invalid PCI I/O region size\n"); 1148 pio = 0; 1149 } 1150 } else { 1151 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n"); 1152 pio = 0; 1153 } 1154 1155 /* Use MMIO operations for all accesses. */ 1156 mmio = pci_resource_start(ha->pdev, 1); 1157 mmio_len = pci_resource_len(ha->pdev, 1); 1158 mmio_flags = pci_resource_flags(ha->pdev, 1); 1159 1160 if (!(mmio_flags & IORESOURCE_MEM)) { 1161 dev_err(&ha->pdev->dev, 1162 "region #0 not an MMIO resource, aborting\n"); 1163 1164 goto iospace_error_exit; 1165 } 1166 if (mmio_len < MIN_IOBASE_LEN) { 1167 dev_err(&ha->pdev->dev, 1168 "Invalid PCI mem region size, aborting\n"); 1169 goto iospace_error_exit; 1170 } 1171 1172 if (pci_request_regions(ha->pdev, DRIVER_NAME)) { 1173 dev_warn(&ha->pdev->dev, 1174 "Failed to reserve PIO/MMIO regions\n"); 1175 1176 goto iospace_error_exit; 1177 } 1178 1179 ha->pio_address = pio; 1180 ha->pio_length = pio_len; 1181 ha->reg = ioremap(mmio, MIN_IOBASE_LEN); 1182 if (!ha->reg) { 1183 dev_err(&ha->pdev->dev, 1184 "cannot remap MMIO, aborting\n"); 1185 1186 goto iospace_error_exit; 1187 } 1188 1189 return 0; 1190 1191 iospace_error_exit: 1192 return -ENOMEM; 1193 } 1194 1195 /** 1196 * qla4xxx_probe_adapter - callback function to probe HBA 1197 * @pdev: pointer to pci_dev structure 1198 * @pci_device_id: pointer to pci_device entry 1199 * 1200 * This routine will probe for Qlogic 4xxx iSCSI host adapters. 1201 * It returns zero if successful. It also initializes all data necessary for 1202 * the driver. 1203 **/ 1204 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev, 1205 const struct pci_device_id *ent) 1206 { 1207 int ret = -ENODEV, status; 1208 struct Scsi_Host *host; 1209 struct scsi_qla_host *ha; 1210 struct ddb_entry *ddb_entry, *ddbtemp; 1211 uint8_t init_retry_count = 0; 1212 char buf[34]; 1213 1214 if (pci_enable_device(pdev)) 1215 return -1; 1216 1217 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha)); 1218 if (host == NULL) { 1219 printk(KERN_WARNING 1220 "qla4xxx: Couldn't allocate host from scsi layer!\n"); 1221 goto probe_disable_device; 1222 } 1223 1224 /* Clear our data area */ 1225 ha = (struct scsi_qla_host *) host->hostdata; 1226 memset(ha, 0, sizeof(*ha)); 1227 1228 /* Save the information from PCI BIOS. */ 1229 ha->pdev = pdev; 1230 ha->host = host; 1231 ha->host_no = host->host_no; 1232 1233 /* Configure PCI I/O space. */ 1234 ret = qla4xxx_iospace_config(ha); 1235 if (ret) 1236 goto probe_failed; 1237 1238 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n", 1239 pdev->device, pdev->irq, ha->reg); 1240 1241 qla4xxx_config_dma_addressing(ha); 1242 1243 /* Initialize lists and spinlocks. */ 1244 INIT_LIST_HEAD(&ha->ddb_list); 1245 INIT_LIST_HEAD(&ha->free_srb_q); 1246 1247 mutex_init(&ha->mbox_sem); 1248 1249 spin_lock_init(&ha->hardware_lock); 1250 1251 /* Allocate dma buffers */ 1252 if (qla4xxx_mem_alloc(ha)) { 1253 dev_warn(&ha->pdev->dev, 1254 "[ERROR] Failed to allocate memory for adapter\n"); 1255 1256 ret = -ENOMEM; 1257 goto probe_failed; 1258 } 1259 1260 /* 1261 * Initialize the Host adapter request/response queues and 1262 * firmware 1263 * NOTE: interrupts enabled upon successful completion 1264 */ 1265 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1266 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) { 1267 DEBUG2(printk("scsi: %s: retrying adapter initialization " 1268 "(%d)\n", __func__, init_retry_count)); 1269 qla4xxx_soft_reset(ha); 1270 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST); 1271 } 1272 if (status == QLA_ERROR) { 1273 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n"); 1274 1275 ret = -ENODEV; 1276 goto probe_failed; 1277 } 1278 1279 host->cmd_per_lun = 3; 1280 host->max_channel = 0; 1281 host->max_lun = MAX_LUNS - 1; 1282 host->max_id = MAX_TARGETS; 1283 host->max_cmd_len = IOCB_MAX_CDB_LEN; 1284 host->can_queue = MAX_SRBS ; 1285 host->transportt = qla4xxx_scsi_transport; 1286 1287 ret = scsi_init_shared_tag_map(host, MAX_SRBS); 1288 if (ret) { 1289 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n"); 1290 goto probe_failed; 1291 } 1292 1293 /* Startup the kernel thread for this host adapter. */ 1294 DEBUG2(printk("scsi: %s: Starting kernel thread for " 1295 "qla4xxx_dpc\n", __func__)); 1296 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no); 1297 ha->dpc_thread = create_singlethread_workqueue(buf); 1298 if (!ha->dpc_thread) { 1299 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n"); 1300 ret = -ENODEV; 1301 goto probe_failed; 1302 } 1303 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc); 1304 1305 ret = request_irq(pdev->irq, qla4xxx_intr_handler, 1306 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha); 1307 if (ret) { 1308 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d" 1309 " already in use.\n", pdev->irq); 1310 goto probe_failed; 1311 } 1312 set_bit(AF_IRQ_ATTACHED, &ha->flags); 1313 host->irq = pdev->irq; 1314 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq)); 1315 1316 qla4xxx_enable_intrs(ha); 1317 1318 /* Start timer thread. */ 1319 qla4xxx_start_timer(ha, qla4xxx_timer, 1); 1320 1321 set_bit(AF_INIT_DONE, &ha->flags); 1322 1323 pci_set_drvdata(pdev, ha); 1324 1325 ret = scsi_add_host(host, &pdev->dev); 1326 if (ret) 1327 goto probe_failed; 1328 1329 /* Update transport device information for all devices. */ 1330 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) { 1331 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE) 1332 if (qla4xxx_add_sess(ddb_entry)) 1333 goto remove_host; 1334 } 1335 1336 printk(KERN_INFO 1337 " QLogic iSCSI HBA Driver version: %s\n" 1338 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n", 1339 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev), 1340 ha->host_no, ha->firmware_version[0], ha->firmware_version[1], 1341 ha->patch_number, ha->build_number); 1342 1343 return 0; 1344 1345 remove_host: 1346 qla4xxx_free_ddb_list(ha); 1347 scsi_remove_host(host); 1348 1349 probe_failed: 1350 qla4xxx_free_adapter(ha); 1351 scsi_host_put(ha->host); 1352 1353 probe_disable_device: 1354 pci_disable_device(pdev); 1355 1356 return ret; 1357 } 1358 1359 /** 1360 * qla4xxx_remove_adapter - calback function to remove adapter. 1361 * @pci_dev: PCI device pointer 1362 **/ 1363 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev) 1364 { 1365 struct scsi_qla_host *ha; 1366 1367 ha = pci_get_drvdata(pdev); 1368 1369 qla4xxx_disable_intrs(ha); 1370 1371 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) 1372 ssleep(1); 1373 1374 /* remove devs from iscsi_sessions to scsi_devices */ 1375 qla4xxx_free_ddb_list(ha); 1376 1377 scsi_remove_host(ha->host); 1378 1379 qla4xxx_free_adapter(ha); 1380 1381 scsi_host_put(ha->host); 1382 1383 pci_set_drvdata(pdev, NULL); 1384 } 1385 1386 /** 1387 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method. 1388 * @ha: HA context 1389 * 1390 * At exit, the @ha's flags.enable_64bit_addressing set to indicated 1391 * supported addressing method. 1392 */ 1393 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha) 1394 { 1395 int retval; 1396 1397 /* Update our PCI device dma_mask for full 64 bit mask */ 1398 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) { 1399 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) { 1400 dev_dbg(&ha->pdev->dev, 1401 "Failed to set 64 bit PCI consistent mask; " 1402 "using 32 bit.\n"); 1403 retval = pci_set_consistent_dma_mask(ha->pdev, 1404 DMA_32BIT_MASK); 1405 } 1406 } else 1407 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK); 1408 } 1409 1410 static int qla4xxx_slave_alloc(struct scsi_device *sdev) 1411 { 1412 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target); 1413 struct ddb_entry *ddb = sess->dd_data; 1414 1415 sdev->hostdata = ddb; 1416 sdev->tagged_supported = 1; 1417 scsi_activate_tcq(sdev, sdev->host->can_queue); 1418 return 0; 1419 } 1420 1421 static int qla4xxx_slave_configure(struct scsi_device *sdev) 1422 { 1423 sdev->tagged_supported = 1; 1424 return 0; 1425 } 1426 1427 static void qla4xxx_slave_destroy(struct scsi_device *sdev) 1428 { 1429 scsi_deactivate_tcq(sdev, 1); 1430 } 1431 1432 /** 1433 * qla4xxx_del_from_active_array - returns an active srb 1434 * @ha: Pointer to host adapter structure. 1435 * @index: index into to the active_array 1436 * 1437 * This routine removes and returns the srb at the specified index 1438 **/ 1439 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index) 1440 { 1441 struct srb *srb = NULL; 1442 struct scsi_cmnd *cmd; 1443 1444 if (!(cmd = scsi_host_find_tag(ha->host, index))) 1445 return srb; 1446 1447 if (!(srb = (struct srb *)cmd->host_scribble)) 1448 return srb; 1449 1450 /* update counters */ 1451 if (srb->flags & SRB_DMA_VALID) { 1452 ha->req_q_count += srb->iocb_cnt; 1453 ha->iocb_cnt -= srb->iocb_cnt; 1454 if (srb->cmd) 1455 srb->cmd->host_scribble = NULL; 1456 } 1457 return srb; 1458 } 1459 1460 /** 1461 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware 1462 * @ha: actual ha whose done queue will contain the comd returned by firmware. 1463 * @cmd: Scsi Command to wait on. 1464 * 1465 * This routine waits for the command to be returned by the Firmware 1466 * for some max time. 1467 **/ 1468 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha, 1469 struct scsi_cmnd *cmd) 1470 { 1471 int done = 0; 1472 struct srb *rp; 1473 uint32_t max_wait_time = EH_WAIT_CMD_TOV; 1474 1475 do { 1476 /* Checking to see if its returned to OS */ 1477 rp = (struct srb *) cmd->SCp.ptr; 1478 if (rp == NULL) { 1479 done++; 1480 break; 1481 } 1482 1483 msleep(2000); 1484 } while (max_wait_time--); 1485 1486 return done; 1487 } 1488 1489 /** 1490 * qla4xxx_wait_for_hba_online - waits for HBA to come online 1491 * @ha: Pointer to host adapter structure 1492 **/ 1493 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha) 1494 { 1495 unsigned long wait_online; 1496 1497 wait_online = jiffies + (30 * HZ); 1498 while (time_before(jiffies, wait_online)) { 1499 1500 if (adapter_up(ha)) 1501 return QLA_SUCCESS; 1502 else if (ha->retry_reset_ha_cnt == 0) 1503 return QLA_ERROR; 1504 1505 msleep(2000); 1506 } 1507 1508 return QLA_ERROR; 1509 } 1510 1511 /** 1512 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish. 1513 * @ha: pointer to to HBA 1514 * @t: target id 1515 * @l: lun id 1516 * 1517 * This function waits for all outstanding commands to a lun to complete. It 1518 * returns 0 if all pending commands are returned and 1 otherwise. 1519 **/ 1520 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha, 1521 int t, int l) 1522 { 1523 int cnt; 1524 int status = 0; 1525 struct scsi_cmnd *cmd; 1526 1527 /* 1528 * Waiting for all commands for the designated target in the active 1529 * array 1530 */ 1531 for (cnt = 0; cnt < ha->host->can_queue; cnt++) { 1532 cmd = scsi_host_find_tag(ha->host, cnt); 1533 if (cmd && cmd->device->id == t && cmd->device->lun == l) { 1534 if (!qla4xxx_eh_wait_on_command(ha, cmd)) { 1535 status++; 1536 break; 1537 } 1538 } 1539 } 1540 return status; 1541 } 1542 1543 /** 1544 * qla4xxx_eh_device_reset - callback for target reset. 1545 * @cmd: Pointer to Linux's SCSI command structure 1546 * 1547 * This routine is called by the Linux OS to reset all luns on the 1548 * specified target. 1549 **/ 1550 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd) 1551 { 1552 struct scsi_qla_host *ha = to_qla_host(cmd->device->host); 1553 struct ddb_entry *ddb_entry = cmd->device->hostdata; 1554 struct srb *sp; 1555 int ret = FAILED, stat; 1556 1557 sp = (struct srb *) cmd->SCp.ptr; 1558 if (!sp || !ddb_entry) 1559 return ret; 1560 1561 dev_info(&ha->pdev->dev, 1562 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no, 1563 cmd->device->channel, cmd->device->id, cmd->device->lun); 1564 1565 DEBUG2(printk(KERN_INFO 1566 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x," 1567 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no, 1568 cmd, jiffies, cmd->timeout_per_command / HZ, 1569 ha->dpc_flags, cmd->result, cmd->allowed)); 1570 1571 /* FIXME: wait for hba to go online */ 1572 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun); 1573 if (stat != QLA_SUCCESS) { 1574 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat); 1575 goto eh_dev_reset_done; 1576 } 1577 1578 /* Send marker. */ 1579 ha->marker_needed = 1; 1580 1581 /* 1582 * If we are coming down the EH path, wait for all commands to complete 1583 * for the device. 1584 */ 1585 if (cmd->device->host->shost_state == SHOST_RECOVERY) { 1586 if (qla4xxx_eh_wait_for_active_target_commands(ha, 1587 cmd->device->id, 1588 cmd->device->lun)){ 1589 dev_info(&ha->pdev->dev, 1590 "DEVICE RESET FAILED - waiting for " 1591 "commands.\n"); 1592 goto eh_dev_reset_done; 1593 } 1594 } 1595 1596 dev_info(&ha->pdev->dev, 1597 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n", 1598 ha->host_no, cmd->device->channel, cmd->device->id, 1599 cmd->device->lun); 1600 1601 ret = SUCCESS; 1602 1603 eh_dev_reset_done: 1604 1605 return ret; 1606 } 1607 1608 /** 1609 * qla4xxx_eh_host_reset - kernel callback 1610 * @cmd: Pointer to Linux's SCSI command structure 1611 * 1612 * This routine is invoked by the Linux kernel to perform fatal error 1613 * recovery on the specified adapter. 1614 **/ 1615 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd) 1616 { 1617 int return_status = FAILED; 1618 struct scsi_qla_host *ha; 1619 1620 ha = (struct scsi_qla_host *) cmd->device->host->hostdata; 1621 1622 dev_info(&ha->pdev->dev, 1623 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, 1624 cmd->device->channel, cmd->device->id, cmd->device->lun); 1625 1626 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) { 1627 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter " 1628 "DEAD.\n", ha->host_no, cmd->device->channel, 1629 __func__)); 1630 1631 return FAILED; 1632 } 1633 1634 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) { 1635 return_status = SUCCESS; 1636 } 1637 1638 dev_info(&ha->pdev->dev, "HOST RESET %s.\n", 1639 return_status == FAILED ? "FAILED" : "SUCCEDED"); 1640 1641 return return_status; 1642 } 1643 1644 1645 static struct pci_device_id qla4xxx_pci_tbl[] = { 1646 { 1647 .vendor = PCI_VENDOR_ID_QLOGIC, 1648 .device = PCI_DEVICE_ID_QLOGIC_ISP4010, 1649 .subvendor = PCI_ANY_ID, 1650 .subdevice = PCI_ANY_ID, 1651 }, 1652 { 1653 .vendor = PCI_VENDOR_ID_QLOGIC, 1654 .device = PCI_DEVICE_ID_QLOGIC_ISP4022, 1655 .subvendor = PCI_ANY_ID, 1656 .subdevice = PCI_ANY_ID, 1657 }, 1658 { 1659 .vendor = PCI_VENDOR_ID_QLOGIC, 1660 .device = PCI_DEVICE_ID_QLOGIC_ISP4032, 1661 .subvendor = PCI_ANY_ID, 1662 .subdevice = PCI_ANY_ID, 1663 }, 1664 {0, 0}, 1665 }; 1666 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl); 1667 1668 static struct pci_driver qla4xxx_pci_driver = { 1669 .name = DRIVER_NAME, 1670 .id_table = qla4xxx_pci_tbl, 1671 .probe = qla4xxx_probe_adapter, 1672 .remove = qla4xxx_remove_adapter, 1673 }; 1674 1675 static int __init qla4xxx_module_init(void) 1676 { 1677 int ret; 1678 1679 /* Allocate cache for SRBs. */ 1680 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0, 1681 SLAB_HWCACHE_ALIGN, NULL); 1682 if (srb_cachep == NULL) { 1683 printk(KERN_ERR 1684 "%s: Unable to allocate SRB cache..." 1685 "Failing load!\n", DRIVER_NAME); 1686 ret = -ENOMEM; 1687 goto no_srp_cache; 1688 } 1689 1690 /* Derive version string. */ 1691 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION); 1692 if (ql4xextended_error_logging) 1693 strcat(qla4xxx_version_str, "-debug"); 1694 1695 qla4xxx_scsi_transport = 1696 iscsi_register_transport(&qla4xxx_iscsi_transport); 1697 if (!qla4xxx_scsi_transport){ 1698 ret = -ENODEV; 1699 goto release_srb_cache; 1700 } 1701 1702 ret = pci_register_driver(&qla4xxx_pci_driver); 1703 if (ret) 1704 goto unregister_transport; 1705 1706 printk(KERN_INFO "QLogic iSCSI HBA Driver\n"); 1707 return 0; 1708 1709 unregister_transport: 1710 iscsi_unregister_transport(&qla4xxx_iscsi_transport); 1711 release_srb_cache: 1712 kmem_cache_destroy(srb_cachep); 1713 no_srp_cache: 1714 return ret; 1715 } 1716 1717 static void __exit qla4xxx_module_exit(void) 1718 { 1719 ql4_mod_unload = 1; 1720 pci_unregister_driver(&qla4xxx_pci_driver); 1721 iscsi_unregister_transport(&qla4xxx_iscsi_transport); 1722 kmem_cache_destroy(srb_cachep); 1723 } 1724 1725 module_init(qla4xxx_module_init); 1726 module_exit(qla4xxx_module_exit); 1727 1728 MODULE_AUTHOR("QLogic Corporation"); 1729 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver"); 1730 MODULE_LICENSE("GPL"); 1731 MODULE_VERSION(QLA4XXX_DRIVER_VERSION); 1732