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