2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
5 * See LICENSE.qla4xxx for copyright and licensing details.
7 #include <linux/moduleparam.h>
9 #include <scsi/scsi_tcq.h>
10 #include <scsi/scsicam.h>
13 #include "ql4_version.h"
16 #include "ql4_inline.h"
21 static char qla4xxx_version_str[40];
24 * SRB allocation cache
26 static struct kmem_cache *srb_cachep;
29 * Module parameter information and variables
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");
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");
47 int ql4_mod_unload = 0;
50 * SCSI host template entry points
52 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
55 * iSCSI template entry points
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_recovery_timedout(struct iscsi_cls_session *session);
69 * SCSI host template entry points
71 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
72 void (*done) (struct scsi_cmnd *));
73 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
74 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
75 static int qla4xxx_slave_alloc(struct scsi_device *device);
76 static int qla4xxx_slave_configure(struct scsi_device *device);
77 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
79 static struct scsi_host_template qla4xxx_driver_template = {
80 .module = THIS_MODULE,
82 .proc_name = DRIVER_NAME,
83 .queuecommand = qla4xxx_queuecommand,
85 .eh_device_reset_handler = qla4xxx_eh_device_reset,
86 .eh_host_reset_handler = qla4xxx_eh_host_reset,
88 .slave_configure = qla4xxx_slave_configure,
89 .slave_alloc = qla4xxx_slave_alloc,
90 .slave_destroy = qla4xxx_slave_destroy,
94 .use_clustering = ENABLE_CLUSTERING,
95 .sg_tablesize = SG_ALL,
97 .max_sectors = 0xFFFF,
100 static struct iscsi_transport qla4xxx_iscsi_transport = {
101 .owner = THIS_MODULE,
103 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
104 CAP_DATA_PATH_OFFLOAD,
105 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
106 ISCSI_TARGET_NAME | ISCSI_TPGT,
107 .host_param_mask = ISCSI_HOST_HWADDRESS |
108 ISCSI_HOST_IPADDRESS |
109 ISCSI_HOST_INITIATOR_NAME,
110 .sessiondata_size = sizeof(struct ddb_entry),
111 .host_template = &qla4xxx_driver_template,
113 .tgt_dscvr = qla4xxx_tgt_dscvr,
114 .get_conn_param = qla4xxx_conn_get_param,
115 .get_session_param = qla4xxx_sess_get_param,
116 .get_host_param = qla4xxx_host_get_param,
117 .session_recovery_timedout = qla4xxx_recovery_timedout,
120 static struct scsi_transport_template *qla4xxx_scsi_transport;
122 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
124 struct ddb_entry *ddb_entry = session->dd_data;
125 struct scsi_qla_host *ha = ddb_entry->ha;
127 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
128 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
130 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count "
131 "of (%d) secs exhausted, marking device DEAD.\n",
132 ha->host_no, __func__, ddb_entry->fw_ddb_index,
133 ha->port_down_retry_count));
135 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc "
137 ha->host_no, __func__, ha->dpc_flags));
138 queue_work(ha->dpc_thread, &ha->dpc_work);
142 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
143 enum iscsi_host_param param, char *buf)
145 struct scsi_qla_host *ha = to_qla_host(shost);
149 case ISCSI_HOST_PARAM_HWADDRESS:
150 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
152 case ISCSI_HOST_PARAM_IPADDRESS:
153 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
154 ha->ip_address[1], ha->ip_address[2],
157 case ISCSI_HOST_PARAM_INITIATOR_NAME:
158 len = sprintf(buf, "%s\n", ha->name_string);
167 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
168 enum iscsi_param param, char *buf)
170 struct ddb_entry *ddb_entry = sess->dd_data;
174 case ISCSI_PARAM_TARGET_NAME:
175 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
176 ddb_entry->iscsi_name);
178 case ISCSI_PARAM_TPGT:
179 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
188 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
189 enum iscsi_param param, char *buf)
191 struct iscsi_cls_session *session;
192 struct ddb_entry *ddb_entry;
195 session = iscsi_dev_to_session(conn->dev.parent);
196 ddb_entry = session->dd_data;
199 case ISCSI_PARAM_CONN_PORT:
200 len = sprintf(buf, "%hu\n", ddb_entry->port);
202 case ISCSI_PARAM_CONN_ADDRESS:
203 /* TODO: what are the ipv6 bits */
204 len = sprintf(buf, "%u.%u.%u.%u\n",
205 NIPQUAD(ddb_entry->ip_addr));
214 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
215 enum iscsi_tgt_dscvr type, uint32_t enable,
216 struct sockaddr *dst_addr)
218 struct scsi_qla_host *ha;
219 struct sockaddr_in *addr;
220 struct sockaddr_in6 *addr6;
223 ha = (struct scsi_qla_host *) shost->hostdata;
226 case ISCSI_TGT_DSCVR_SEND_TARGETS:
227 if (dst_addr->sa_family == AF_INET) {
228 addr = (struct sockaddr_in *)dst_addr;
229 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
230 addr->sin_port) != QLA_SUCCESS)
232 } else if (dst_addr->sa_family == AF_INET6) {
234 * TODO: fix qla4xxx_send_tgts
236 addr6 = (struct sockaddr_in6 *)dst_addr;
237 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
238 addr6->sin6_port) != QLA_SUCCESS)
249 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
251 if (!ddb_entry->sess)
254 if (ddb_entry->conn) {
255 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
256 iscsi_remove_session(ddb_entry->sess);
258 iscsi_free_session(ddb_entry->sess);
261 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
265 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
266 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
268 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
272 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
273 if (!ddb_entry->conn) {
274 iscsi_remove_session(ddb_entry->sess);
275 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
279 /* finally ready to go */
280 iscsi_unblock_session(ddb_entry->sess);
284 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
286 struct ddb_entry *ddb_entry;
287 struct iscsi_cls_session *sess;
289 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
293 ddb_entry = sess->dd_data;
294 memset(ddb_entry, 0, sizeof(*ddb_entry));
296 ddb_entry->sess = sess;
304 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
305 unsigned long interval)
307 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
308 __func__, ha->host->host_no));
309 init_timer(&ha->timer);
310 ha->timer.expires = jiffies + interval * HZ;
311 ha->timer.data = (unsigned long)ha;
312 ha->timer.function = (void (*)(unsigned long))func;
313 add_timer(&ha->timer);
314 ha->timer_active = 1;
317 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
319 del_timer_sync(&ha->timer);
320 ha->timer_active = 0;
324 * qla4xxx_mark_device_missing - mark a device as missing.
325 * @ha: Pointer to host adapter structure.
326 * @ddb_entry: Pointer to device database entry
328 * This routine marks a device missing and resets the relogin retry count.
330 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
331 struct ddb_entry *ddb_entry)
333 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
334 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
335 ha->host_no, ddb_entry->bus, ddb_entry->target,
336 ddb_entry->fw_ddb_index));
337 iscsi_block_session(ddb_entry->sess);
338 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
341 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
342 struct ddb_entry *ddb_entry,
343 struct scsi_cmnd *cmd,
344 void (*done)(struct scsi_cmnd *))
348 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
352 atomic_set(&srb->ref_count, 1);
354 srb->ddb = ddb_entry;
357 cmd->SCp.ptr = (void *)srb;
358 cmd->scsi_done = done;
363 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
365 struct scsi_cmnd *cmd = srb->cmd;
367 if (srb->flags & SRB_DMA_VALID) {
369 srb->flags &= ~SRB_DMA_VALID;
374 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
376 struct scsi_cmnd *cmd = srb->cmd;
378 qla4xxx_srb_free_dma(ha, srb);
380 mempool_free(srb, ha->srb_mempool);
386 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
387 * @cmd: Pointer to Linux's SCSI command structure
388 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
389 * that the command has been processed.
392 * This routine is invoked by Linux to send a SCSI command to the driver.
393 * The mid-level driver tries to ensure that queuecommand never gets
394 * invoked concurrently with itself or the interrupt handler (although
395 * the interrupt handler may call this routine as part of request-
396 * completion handling). Unfortunely, it sometimes calls the scheduler
397 * in interrupt context which is a big NO! NO!.
399 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
400 void (*done)(struct scsi_cmnd *))
402 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
403 struct ddb_entry *ddb_entry = cmd->device->hostdata;
404 struct iscsi_cls_session *sess = ddb_entry->sess;
409 cmd->result = DID_IMM_RETRY << 16;
410 goto qc_fail_command;
413 rval = iscsi_session_chkready(sess);
416 goto qc_fail_command;
419 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
420 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
421 cmd->result = DID_NO_CONNECT << 16;
422 goto qc_fail_command;
427 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
430 spin_unlock_irq(ha->host->host_lock);
432 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
434 goto qc_host_busy_lock;
436 rval = qla4xxx_send_command_to_isp(ha, srb);
437 if (rval != QLA_SUCCESS)
438 goto qc_host_busy_free_sp;
440 spin_lock_irq(ha->host->host_lock);
443 qc_host_busy_free_sp:
444 qla4xxx_srb_free_dma(ha, srb);
445 mempool_free(srb, ha->srb_mempool);
448 spin_lock_irq(ha->host->host_lock);
451 return SCSI_MLQUEUE_HOST_BUSY;
460 * qla4xxx_mem_free - frees memory allocated to adapter
461 * @ha: Pointer to host adapter structure.
463 * Frees memory previously allocated by qla4xxx_mem_alloc
465 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
468 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
474 ha->request_ring = NULL;
476 ha->response_ring = NULL;
477 ha->response_dma = 0;
478 ha->shadow_regs = NULL;
479 ha->shadow_regs_dma = 0;
483 mempool_destroy(ha->srb_mempool);
485 ha->srb_mempool = NULL;
487 /* release io space registers */
490 pci_release_regions(ha->pdev);
494 * qla4xxx_mem_alloc - allocates memory for use by adapter.
495 * @ha: Pointer to host adapter structure
497 * Allocates DMA memory for request and response queues. Also allocates memory
500 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
504 /* Allocate contiguous block of DMA memory for queues. */
505 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
506 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
507 sizeof(struct shadow_regs) +
509 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
510 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
511 &ha->queues_dma, GFP_KERNEL);
512 if (ha->queues == NULL) {
513 dev_warn(&ha->pdev->dev,
514 "Memory Allocation failed - queues.\n");
516 goto mem_alloc_error_exit;
518 memset(ha->queues, 0, ha->queues_len);
521 * As per RISC alignment requirements -- the bus-address must be a
522 * multiple of the request-ring size (in bytes).
525 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
526 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
527 (MEM_ALIGN_VALUE - 1));
529 /* Update request and response queue pointers. */
530 ha->request_dma = ha->queues_dma + align;
531 ha->request_ring = (struct queue_entry *) (ha->queues + align);
532 ha->response_dma = ha->queues_dma + align +
533 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
534 ha->response_ring = (struct queue_entry *) (ha->queues + align +
535 (REQUEST_QUEUE_DEPTH *
537 ha->shadow_regs_dma = ha->queues_dma + align +
538 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
539 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
540 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
541 (REQUEST_QUEUE_DEPTH *
543 (RESPONSE_QUEUE_DEPTH *
546 /* Allocate memory for srb pool. */
547 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
548 mempool_free_slab, srb_cachep);
549 if (ha->srb_mempool == NULL) {
550 dev_warn(&ha->pdev->dev,
551 "Memory Allocation failed - SRB Pool.\n");
553 goto mem_alloc_error_exit;
558 mem_alloc_error_exit:
559 qla4xxx_mem_free(ha);
564 * qla4xxx_timer - checks every second for work to do.
565 * @ha: Pointer to host adapter structure.
567 static void qla4xxx_timer(struct scsi_qla_host *ha)
569 struct ddb_entry *ddb_entry, *dtemp;
572 /* Search for relogin's to time-out and port down retry. */
573 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
574 /* Count down time between sending relogins */
575 if (adapter_up(ha) &&
576 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
577 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
578 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
580 if (atomic_read(&ddb_entry->retry_relogin_timer)
582 atomic_set(&ddb_entry->
585 set_bit(DPC_RELOGIN_DEVICE,
587 set_bit(DF_RELOGIN, &ddb_entry->flags);
588 DEBUG2(printk("scsi%ld: %s: index [%d]"
590 ha->host_no, __func__,
591 ddb_entry->fw_ddb_index));
593 atomic_dec(&ddb_entry->
594 retry_relogin_timer);
598 /* Wait for relogin to timeout */
599 if (atomic_read(&ddb_entry->relogin_timer) &&
600 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
602 * If the relogin times out and the device is
603 * still NOT ONLINE then try and relogin again.
605 if (atomic_read(&ddb_entry->state) !=
607 ddb_entry->fw_ddb_device_state ==
608 DDB_DS_SESSION_FAILED) {
609 /* Reset retry relogin timer */
610 atomic_inc(&ddb_entry->relogin_retry_count);
611 DEBUG2(printk("scsi%ld: index[%d] relogin"
612 " timed out-retrying"
615 ddb_entry->fw_ddb_index,
616 atomic_read(&ddb_entry->
617 relogin_retry_count))
620 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
621 "initate relogin after"
623 ha->host_no, ddb_entry->bus,
625 ddb_entry->fw_ddb_index,
626 ddb_entry->default_time2wait + 4)
629 atomic_set(&ddb_entry->retry_relogin_timer,
630 ddb_entry->default_time2wait + 4);
635 /* Check for heartbeat interval. */
636 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
637 ha->heartbeat_interval != 0) {
638 ha->seconds_since_last_heartbeat++;
639 if (ha->seconds_since_last_heartbeat >
640 ha->heartbeat_interval + 2)
641 set_bit(DPC_RESET_HA, &ha->dpc_flags);
645 /* Wakeup the dpc routine for this adapter, if needed. */
647 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
648 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
649 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
650 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
651 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
652 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
653 test_bit(DPC_AEN, &ha->dpc_flags)) &&
655 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
656 " - dpc flags = 0x%lx\n",
657 ha->host_no, __func__, ha->dpc_flags));
658 queue_work(ha->dpc_thread, &ha->dpc_work);
661 /* Reschedule timer thread to call us back in one second */
662 mod_timer(&ha->timer, jiffies + HZ);
664 DEBUG2(ha->seconds_since_last_intr++);
668 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
669 * @ha: Pointer to host adapter structure.
671 * This routine stalls the driver until all outstanding commands are returned.
672 * Caller must release the Hardware Lock prior to calling this routine.
674 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
677 int stat = QLA_SUCCESS;
679 struct scsi_cmnd *cmd;
680 int wait_cnt = WAIT_CMD_TOV; /*
681 * Initialized for 30 seconds as we
682 * expect all commands to retuned
687 spin_lock_irqsave(&ha->hardware_lock, flags);
688 /* Find a command that hasn't completed. */
689 for (index = 0; index < ha->host->can_queue; index++) {
690 cmd = scsi_host_find_tag(ha->host, index);
694 spin_unlock_irqrestore(&ha->hardware_lock, flags);
696 /* If No Commands are pending, wait is complete */
697 if (index == ha->host->can_queue) {
701 /* If we timed out on waiting for commands to come back
710 } /* End of While (wait_cnt) */
715 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
717 uint32_t ctrl_status;
718 unsigned long flags = 0;
720 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
722 spin_lock_irqsave(&ha->hardware_lock, flags);
725 * If the SCSI Reset Interrupt bit is set, clear it.
726 * Otherwise, the Soft Reset won't work.
728 ctrl_status = readw(&ha->reg->ctrl_status);
729 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
730 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
732 /* Issue Soft Reset */
733 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
734 readl(&ha->reg->ctrl_status);
736 spin_unlock_irqrestore(&ha->hardware_lock, flags);
740 * qla4xxx_soft_reset - performs soft reset.
741 * @ha: Pointer to host adapter structure.
743 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
745 uint32_t max_wait_time;
746 unsigned long flags = 0;
747 int status = QLA_ERROR;
748 uint32_t ctrl_status;
750 qla4xxx_hw_reset(ha);
752 /* Wait until the Network Reset Intr bit is cleared */
753 max_wait_time = RESET_INTR_TOV;
755 spin_lock_irqsave(&ha->hardware_lock, flags);
756 ctrl_status = readw(&ha->reg->ctrl_status);
757 spin_unlock_irqrestore(&ha->hardware_lock, flags);
759 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
763 } while ((--max_wait_time));
765 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
766 DEBUG2(printk(KERN_WARNING
767 "scsi%ld: Network Reset Intr not cleared by "
768 "Network function, clearing it now!\n",
770 spin_lock_irqsave(&ha->hardware_lock, flags);
771 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
772 readl(&ha->reg->ctrl_status);
773 spin_unlock_irqrestore(&ha->hardware_lock, flags);
776 /* Wait until the firmware tells us the Soft Reset is done */
777 max_wait_time = SOFT_RESET_TOV;
779 spin_lock_irqsave(&ha->hardware_lock, flags);
780 ctrl_status = readw(&ha->reg->ctrl_status);
781 spin_unlock_irqrestore(&ha->hardware_lock, flags);
783 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
784 status = QLA_SUCCESS;
789 } while ((--max_wait_time));
792 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
793 * after the soft reset has taken place.
795 spin_lock_irqsave(&ha->hardware_lock, flags);
796 ctrl_status = readw(&ha->reg->ctrl_status);
797 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
798 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
799 readl(&ha->reg->ctrl_status);
801 spin_unlock_irqrestore(&ha->hardware_lock, flags);
803 /* If soft reset fails then most probably the bios on other
804 * function is also enabled.
805 * Since the initialization is sequential the other fn
806 * wont be able to acknowledge the soft reset.
807 * Issue a force soft reset to workaround this scenario.
809 if (max_wait_time == 0) {
810 /* Issue Force Soft Reset */
811 spin_lock_irqsave(&ha->hardware_lock, flags);
812 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
813 readl(&ha->reg->ctrl_status);
814 spin_unlock_irqrestore(&ha->hardware_lock, flags);
815 /* Wait until the firmware tells us the Soft Reset is done */
816 max_wait_time = SOFT_RESET_TOV;
818 spin_lock_irqsave(&ha->hardware_lock, flags);
819 ctrl_status = readw(&ha->reg->ctrl_status);
820 spin_unlock_irqrestore(&ha->hardware_lock, flags);
822 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
823 status = QLA_SUCCESS;
828 } while ((--max_wait_time));
835 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
836 * @ha: Pointer to host adapter structure.
838 * This routine is called just prior to a HARD RESET to return all
839 * outstanding commands back to the Operating System.
840 * Caller should make sure that the following locks are released
841 * before this calling routine: Hardware lock, and io_request_lock.
843 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
849 spin_lock_irqsave(&ha->hardware_lock, flags);
850 for (i = 0; i < ha->host->can_queue; i++) {
851 srb = qla4xxx_del_from_active_array(ha, i);
853 srb->cmd->result = DID_RESET << 16;
854 qla4xxx_srb_compl(ha, srb);
857 spin_unlock_irqrestore(&ha->hardware_lock, flags);
862 * qla4xxx_recover_adapter - recovers adapter after a fatal error
863 * @ha: Pointer to host adapter structure.
864 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
865 * after adapter recovery has completed.
866 * 0=preserve ddb list, 1=destroy and rebuild ddb list
868 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
869 uint8_t renew_ddb_list)
873 /* Stall incoming I/O until we are done */
874 clear_bit(AF_ONLINE, &ha->flags);
875 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
878 /* Wait for outstanding commands to complete.
879 * Stalls the driver for max 30 secs
881 status = qla4xxx_cmd_wait(ha);
883 qla4xxx_disable_intrs(ha);
885 /* Flush any pending ddb changed AENs */
886 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
888 /* Reset the firmware. If successful, function
889 * returns with ISP interrupts enabled.
891 if (status == QLA_SUCCESS) {
892 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
893 ha->host_no, __func__));
894 qla4xxx_flush_active_srbs(ha);
895 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
896 status = qla4xxx_soft_reset(ha);
901 /* Flush any pending ddb changed AENs */
902 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
904 /* Re-initialize firmware. If successful, function returns
905 * with ISP interrupts enabled */
906 if (status == QLA_SUCCESS) {
907 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
908 ha->host_no, __func__));
910 /* If successful, AF_ONLINE flag set in
911 * qla4xxx_initialize_adapter */
912 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
915 /* Failed adapter initialization?
916 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
917 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
918 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
919 /* Adapter initialization failed, see if we can retry
920 * resetting the ha */
921 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
922 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
923 DEBUG2(printk("scsi%ld: recover adapter - retrying "
924 "(%d) more times\n", ha->host_no,
925 ha->retry_reset_ha_cnt));
926 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
929 if (ha->retry_reset_ha_cnt > 0) {
930 /* Schedule another Reset HA--DPC will retry */
931 ha->retry_reset_ha_cnt--;
932 DEBUG2(printk("scsi%ld: recover adapter - "
933 "retry remaining %d\n",
935 ha->retry_reset_ha_cnt));
939 if (ha->retry_reset_ha_cnt == 0) {
940 /* Recover adapter retries have been exhausted.
942 DEBUG2(printk("scsi%ld: recover adapter "
943 "failed - board disabled\n",
945 qla4xxx_flush_active_srbs(ha);
946 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
947 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
948 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
954 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
955 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
956 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
959 ha->adapter_error_count++;
961 if (status == QLA_SUCCESS)
962 qla4xxx_enable_intrs(ha);
964 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
969 * qla4xxx_do_dpc - dpc routine
970 * @data: in our case pointer to adapter structure
972 * This routine is a task that is schedule by the interrupt handler
973 * to perform the background processing for interrupts. We put it
974 * on a task queue that is consumed whenever the scheduler runs; that's
975 * so you can do anything (i.e. put the process to sleep etc). In fact,
976 * the mid-level tries to sleep when it reaches the driver threshold
977 * "host->can_queue". This can cause a panic if we were in our interrupt code.
979 static void qla4xxx_do_dpc(struct work_struct *work)
981 struct scsi_qla_host *ha =
982 container_of(work, struct scsi_qla_host, dpc_work);
983 struct ddb_entry *ddb_entry, *dtemp;
984 int status = QLA_ERROR;
986 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
987 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
988 ha->host_no, __func__, ha->flags, ha->dpc_flags,
989 readw(&ha->reg->ctrl_status)));
991 /* Initialization not yet finished. Don't do anything yet. */
992 if (!test_bit(AF_INIT_DONE, &ha->flags))
995 if (adapter_up(ha) ||
996 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
997 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
998 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
999 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1000 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1001 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1003 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1004 uint8_t wait_time = RESET_INTR_TOV;
1006 while ((readw(&ha->reg->ctrl_status) &
1007 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1008 if (--wait_time == 0)
1013 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1014 "bit not cleared-- resetting\n",
1015 ha->host_no, __func__));
1016 qla4xxx_flush_active_srbs(ha);
1017 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1018 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1019 status = qla4xxx_initialize_adapter(ha,
1022 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1023 if (status == QLA_SUCCESS)
1024 qla4xxx_enable_intrs(ha);
1028 /* ---- process AEN? --- */
1029 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1030 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1032 /* ---- Get DHCP IP Address? --- */
1033 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1034 qla4xxx_get_dhcp_ip_address(ha);
1036 /* ---- relogin device? --- */
1037 if (adapter_up(ha) &&
1038 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1039 list_for_each_entry_safe(ddb_entry, dtemp,
1040 &ha->ddb_list, list) {
1041 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1042 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1043 qla4xxx_relogin_device(ha, ddb_entry);
1046 * If mbx cmd times out there is no point
1047 * in continuing further.
1048 * With large no of targets this can hang
1051 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1052 printk(KERN_WARNING "scsi%ld: %s: "
1053 "need to reset hba\n",
1054 ha->host_no, __func__);
1062 * qla4xxx_free_adapter - release the adapter
1063 * @ha: pointer to adapter structure
1065 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1068 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1069 /* Turn-off interrupts on the card. */
1070 qla4xxx_disable_intrs(ha);
1073 /* Kill the kernel thread for this host */
1075 destroy_workqueue(ha->dpc_thread);
1077 /* Issue Soft Reset to put firmware in unknown state */
1078 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1079 qla4xxx_hw_reset(ha);
1081 /* Remove timer thread, if present */
1082 if (ha->timer_active)
1083 qla4xxx_stop_timer(ha);
1085 /* Detach interrupts */
1086 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1087 free_irq(ha->pdev->irq, ha);
1089 /* free extra memory */
1090 qla4xxx_mem_free(ha);
1092 pci_disable_device(ha->pdev);
1097 * qla4xxx_iospace_config - maps registers
1098 * @ha: pointer to adapter structure
1100 * This routines maps HBA's registers from the pci address space
1101 * into the kernel virtual address space for memory mapped i/o.
1103 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1105 unsigned long pio, pio_len, pio_flags;
1106 unsigned long mmio, mmio_len, mmio_flags;
1108 pio = pci_resource_start(ha->pdev, 0);
1109 pio_len = pci_resource_len(ha->pdev, 0);
1110 pio_flags = pci_resource_flags(ha->pdev, 0);
1111 if (pio_flags & IORESOURCE_IO) {
1112 if (pio_len < MIN_IOBASE_LEN) {
1113 dev_warn(&ha->pdev->dev,
1114 "Invalid PCI I/O region size\n");
1118 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1122 /* Use MMIO operations for all accesses. */
1123 mmio = pci_resource_start(ha->pdev, 1);
1124 mmio_len = pci_resource_len(ha->pdev, 1);
1125 mmio_flags = pci_resource_flags(ha->pdev, 1);
1127 if (!(mmio_flags & IORESOURCE_MEM)) {
1128 dev_err(&ha->pdev->dev,
1129 "region #0 not an MMIO resource, aborting\n");
1131 goto iospace_error_exit;
1133 if (mmio_len < MIN_IOBASE_LEN) {
1134 dev_err(&ha->pdev->dev,
1135 "Invalid PCI mem region size, aborting\n");
1136 goto iospace_error_exit;
1139 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1140 dev_warn(&ha->pdev->dev,
1141 "Failed to reserve PIO/MMIO regions\n");
1143 goto iospace_error_exit;
1146 ha->pio_address = pio;
1147 ha->pio_length = pio_len;
1148 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1150 dev_err(&ha->pdev->dev,
1151 "cannot remap MMIO, aborting\n");
1153 goto iospace_error_exit;
1163 * qla4xxx_probe_adapter - callback function to probe HBA
1164 * @pdev: pointer to pci_dev structure
1165 * @pci_device_id: pointer to pci_device entry
1167 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1168 * It returns zero if successful. It also initializes all data necessary for
1171 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1172 const struct pci_device_id *ent)
1174 int ret = -ENODEV, status;
1175 struct Scsi_Host *host;
1176 struct scsi_qla_host *ha;
1177 struct ddb_entry *ddb_entry, *ddbtemp;
1178 uint8_t init_retry_count = 0;
1181 if (pci_enable_device(pdev))
1184 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1187 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1188 goto probe_disable_device;
1191 /* Clear our data area */
1192 ha = (struct scsi_qla_host *) host->hostdata;
1193 memset(ha, 0, sizeof(*ha));
1195 /* Save the information from PCI BIOS. */
1198 ha->host_no = host->host_no;
1200 /* Configure PCI I/O space. */
1201 ret = qla4xxx_iospace_config(ha);
1205 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1206 pdev->device, pdev->irq, ha->reg);
1208 qla4xxx_config_dma_addressing(ha);
1210 /* Initialize lists and spinlocks. */
1211 INIT_LIST_HEAD(&ha->ddb_list);
1212 INIT_LIST_HEAD(&ha->free_srb_q);
1214 mutex_init(&ha->mbox_sem);
1216 spin_lock_init(&ha->hardware_lock);
1218 /* Allocate dma buffers */
1219 if (qla4xxx_mem_alloc(ha)) {
1220 dev_warn(&ha->pdev->dev,
1221 "[ERROR] Failed to allocate memory for adapter\n");
1228 * Initialize the Host adapter request/response queues and
1230 * NOTE: interrupts enabled upon successful completion
1232 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1233 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1234 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1235 "(%d)\n", __func__, init_retry_count));
1236 qla4xxx_soft_reset(ha);
1237 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1239 if (status == QLA_ERROR) {
1240 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1246 host->cmd_per_lun = 3;
1247 host->max_channel = 0;
1248 host->max_lun = MAX_LUNS - 1;
1249 host->max_id = MAX_TARGETS;
1250 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1251 host->can_queue = MAX_SRBS ;
1252 host->transportt = qla4xxx_scsi_transport;
1254 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1256 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1260 /* Startup the kernel thread for this host adapter. */
1261 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1262 "qla4xxx_dpc\n", __func__));
1263 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1264 ha->dpc_thread = create_singlethread_workqueue(buf);
1265 if (!ha->dpc_thread) {
1266 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1270 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1272 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1273 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1275 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1276 " already in use.\n", pdev->irq);
1279 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1280 host->irq = pdev->irq;
1281 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1283 qla4xxx_enable_intrs(ha);
1285 /* Start timer thread. */
1286 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1288 set_bit(AF_INIT_DONE, &ha->flags);
1290 pci_set_drvdata(pdev, ha);
1292 ret = scsi_add_host(host, &pdev->dev);
1296 /* Update transport device information for all devices. */
1297 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1298 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1299 if (qla4xxx_add_sess(ddb_entry))
1304 " QLogic iSCSI HBA Driver version: %s\n"
1305 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1306 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1307 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1308 ha->patch_number, ha->build_number);
1313 qla4xxx_free_ddb_list(ha);
1314 scsi_remove_host(host);
1317 qla4xxx_free_adapter(ha);
1318 scsi_host_put(ha->host);
1320 probe_disable_device:
1321 pci_disable_device(pdev);
1327 * qla4xxx_remove_adapter - calback function to remove adapter.
1328 * @pci_dev: PCI device pointer
1330 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1332 struct scsi_qla_host *ha;
1334 ha = pci_get_drvdata(pdev);
1336 qla4xxx_disable_intrs(ha);
1338 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1341 /* remove devs from iscsi_sessions to scsi_devices */
1342 qla4xxx_free_ddb_list(ha);
1344 scsi_remove_host(ha->host);
1346 qla4xxx_free_adapter(ha);
1348 scsi_host_put(ha->host);
1350 pci_set_drvdata(pdev, NULL);
1354 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1357 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1358 * supported addressing method.
1360 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1364 /* Update our PCI device dma_mask for full 64 bit mask */
1365 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1366 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1367 dev_dbg(&ha->pdev->dev,
1368 "Failed to set 64 bit PCI consistent mask; "
1370 retval = pci_set_consistent_dma_mask(ha->pdev,
1374 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1377 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1379 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1380 struct ddb_entry *ddb = sess->dd_data;
1382 sdev->hostdata = ddb;
1383 sdev->tagged_supported = 1;
1384 scsi_activate_tcq(sdev, sdev->host->can_queue);
1388 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1390 sdev->tagged_supported = 1;
1394 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1396 scsi_deactivate_tcq(sdev, 1);
1400 * qla4xxx_del_from_active_array - returns an active srb
1401 * @ha: Pointer to host adapter structure.
1402 * @index: index into to the active_array
1404 * This routine removes and returns the srb at the specified index
1406 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1408 struct srb *srb = NULL;
1409 struct scsi_cmnd *cmd;
1411 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1414 if (!(srb = (struct srb *)cmd->host_scribble))
1417 /* update counters */
1418 if (srb->flags & SRB_DMA_VALID) {
1419 ha->req_q_count += srb->iocb_cnt;
1420 ha->iocb_cnt -= srb->iocb_cnt;
1422 srb->cmd->host_scribble = NULL;
1428 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1429 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1430 * @cmd: Scsi Command to wait on.
1432 * This routine waits for the command to be returned by the Firmware
1433 * for some max time.
1435 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1436 struct scsi_cmnd *cmd)
1440 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1443 /* Checking to see if its returned to OS */
1444 rp = (struct srb *) cmd->SCp.ptr;
1451 } while (max_wait_time--);
1457 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1458 * @ha: Pointer to host adapter structure
1460 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1462 unsigned long wait_online;
1464 wait_online = jiffies + (30 * HZ);
1465 while (time_before(jiffies, wait_online)) {
1469 else if (ha->retry_reset_ha_cnt == 0)
1479 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1480 * @ha: pointer to to HBA
1484 * This function waits for all outstanding commands to a lun to complete. It
1485 * returns 0 if all pending commands are returned and 1 otherwise.
1487 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1492 struct scsi_cmnd *cmd;
1495 * Waiting for all commands for the designated target in the active
1498 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1499 cmd = scsi_host_find_tag(ha->host, cnt);
1500 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1501 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1511 * qla4xxx_eh_device_reset - callback for target reset.
1512 * @cmd: Pointer to Linux's SCSI command structure
1514 * This routine is called by the Linux OS to reset all luns on the
1517 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1519 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1520 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1522 int ret = FAILED, stat;
1524 sp = (struct srb *) cmd->SCp.ptr;
1525 if (!sp || !ddb_entry)
1528 dev_info(&ha->pdev->dev,
1529 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1530 cmd->device->channel, cmd->device->id, cmd->device->lun);
1532 DEBUG2(printk(KERN_INFO
1533 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1534 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1535 cmd, jiffies, cmd->timeout_per_command / HZ,
1536 ha->dpc_flags, cmd->result, cmd->allowed));
1538 /* FIXME: wait for hba to go online */
1539 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1540 if (stat != QLA_SUCCESS) {
1541 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1542 goto eh_dev_reset_done;
1546 ha->marker_needed = 1;
1549 * If we are coming down the EH path, wait for all commands to complete
1552 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1553 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1556 dev_info(&ha->pdev->dev,
1557 "DEVICE RESET FAILED - waiting for "
1559 goto eh_dev_reset_done;
1563 dev_info(&ha->pdev->dev,
1564 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1565 ha->host_no, cmd->device->channel, cmd->device->id,
1576 * qla4xxx_eh_host_reset - kernel callback
1577 * @cmd: Pointer to Linux's SCSI command structure
1579 * This routine is invoked by the Linux kernel to perform fatal error
1580 * recovery on the specified adapter.
1582 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1584 int return_status = FAILED;
1585 struct scsi_qla_host *ha;
1587 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1589 dev_info(&ha->pdev->dev,
1590 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1591 cmd->device->channel, cmd->device->id, cmd->device->lun);
1593 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1594 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1595 "DEAD.\n", ha->host_no, cmd->device->channel,
1601 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1602 return_status = SUCCESS;
1605 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1606 return_status == FAILED ? "FAILED" : "SUCCEDED");
1608 return return_status;
1612 static struct pci_device_id qla4xxx_pci_tbl[] = {
1614 .vendor = PCI_VENDOR_ID_QLOGIC,
1615 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1616 .subvendor = PCI_ANY_ID,
1617 .subdevice = PCI_ANY_ID,
1620 .vendor = PCI_VENDOR_ID_QLOGIC,
1621 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1622 .subvendor = PCI_ANY_ID,
1623 .subdevice = PCI_ANY_ID,
1626 .vendor = PCI_VENDOR_ID_QLOGIC,
1627 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1628 .subvendor = PCI_ANY_ID,
1629 .subdevice = PCI_ANY_ID,
1633 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1635 static struct pci_driver qla4xxx_pci_driver = {
1636 .name = DRIVER_NAME,
1637 .id_table = qla4xxx_pci_tbl,
1638 .probe = qla4xxx_probe_adapter,
1639 .remove = qla4xxx_remove_adapter,
1642 static int __init qla4xxx_module_init(void)
1646 /* Allocate cache for SRBs. */
1647 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1648 SLAB_HWCACHE_ALIGN, NULL);
1649 if (srb_cachep == NULL) {
1651 "%s: Unable to allocate SRB cache..."
1652 "Failing load!\n", DRIVER_NAME);
1657 /* Derive version string. */
1658 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1659 if (ql4xextended_error_logging)
1660 strcat(qla4xxx_version_str, "-debug");
1662 qla4xxx_scsi_transport =
1663 iscsi_register_transport(&qla4xxx_iscsi_transport);
1664 if (!qla4xxx_scsi_transport){
1666 goto release_srb_cache;
1669 ret = pci_register_driver(&qla4xxx_pci_driver);
1671 goto unregister_transport;
1673 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1676 unregister_transport:
1677 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1679 kmem_cache_destroy(srb_cachep);
1684 static void __exit qla4xxx_module_exit(void)
1687 pci_unregister_driver(&qla4xxx_pci_driver);
1688 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1689 kmem_cache_destroy(srb_cachep);
1692 module_init(qla4xxx_module_init);
1693 module_exit(qla4xxx_module_exit);
1695 MODULE_AUTHOR("QLogic Corporation");
1696 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1697 MODULE_LICENSE("GPL");
1698 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);