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_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
);
71 * SCSI host template entry points
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
);
81 static struct scsi_host_template qla4xxx_driver_template
= {
82 .module
= THIS_MODULE
,
84 .proc_name
= DRIVER_NAME
,
85 .queuecommand
= qla4xxx_queuecommand
,
87 .eh_device_reset_handler
= qla4xxx_eh_device_reset
,
88 .eh_host_reset_handler
= qla4xxx_eh_host_reset
,
90 .slave_configure
= qla4xxx_slave_configure
,
91 .slave_alloc
= qla4xxx_slave_alloc
,
92 .slave_destroy
= qla4xxx_slave_destroy
,
96 .use_clustering
= ENABLE_CLUSTERING
,
97 .sg_tablesize
= SG_ALL
,
99 .max_sectors
= 0xFFFF,
102 static struct iscsi_transport qla4xxx_iscsi_transport
= {
103 .owner
= THIS_MODULE
,
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
,
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
,
124 static struct scsi_transport_template
*qla4xxx_scsi_transport
;
126 static void qla4xxx_recovery_timedout(struct iscsi_cls_session
*session
)
128 struct ddb_entry
*ddb_entry
= session
->dd_data
;
129 struct scsi_qla_host
*ha
= ddb_entry
->ha
;
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
));
136 atomic_set(&ddb_entry
->state
, DDB_STATE_DEAD
);
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
);
143 static int qla4xxx_conn_start(struct iscsi_cls_conn
*conn
)
145 struct iscsi_cls_session
*session
;
146 struct ddb_entry
*ddb_entry
;
148 session
= iscsi_dev_to_session(conn
->dev
.parent
);
149 ddb_entry
= session
->dd_data
;
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
);
158 static void qla4xxx_conn_stop(struct iscsi_cls_conn
*conn
, int flag
)
160 struct iscsi_cls_session
*session
;
161 struct ddb_entry
*ddb_entry
;
163 session
= iscsi_dev_to_session(conn
->dev
.parent
);
164 ddb_entry
= session
->dd_data
;
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
);
172 printk(KERN_ERR
"iscsi: invalid stop flag %d\n", flag
);
175 static ssize_t
format_addr(char *buf
, const unsigned char *addr
, int len
)
180 for (i
= 0; i
< len
; i
++)
181 cp
+= sprintf(cp
, "%02x%c", addr
[i
],
182 i
== (len
- 1) ? '\n' : ':');
187 static int qla4xxx_host_get_param(struct Scsi_Host
*shost
,
188 enum iscsi_host_param param
, char *buf
)
190 struct scsi_qla_host
*ha
= to_qla_host(shost
);
194 case ISCSI_HOST_PARAM_HWADDRESS
:
195 len
= format_addr(buf
, ha
->my_mac
, MAC_ADDR_LEN
);
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],
202 case ISCSI_HOST_PARAM_INITIATOR_NAME
:
203 len
= sprintf(buf
, "%s\n", ha
->name_string
);
212 static int qla4xxx_sess_get_param(struct iscsi_cls_session
*sess
,
213 enum iscsi_param param
, char *buf
)
215 struct ddb_entry
*ddb_entry
= sess
->dd_data
;
219 case ISCSI_PARAM_TARGET_NAME
:
220 len
= snprintf(buf
, PAGE_SIZE
- 1, "%s\n",
221 ddb_entry
->iscsi_name
);
223 case ISCSI_PARAM_TPGT
:
224 len
= sprintf(buf
, "%u\n", ddb_entry
->tpgt
);
233 static int qla4xxx_conn_get_param(struct iscsi_cls_conn
*conn
,
234 enum iscsi_param param
, char *buf
)
236 struct iscsi_cls_session
*session
;
237 struct ddb_entry
*ddb_entry
;
240 session
= iscsi_dev_to_session(conn
->dev
.parent
);
241 ddb_entry
= session
->dd_data
;
244 case ISCSI_PARAM_CONN_PORT
:
245 len
= sprintf(buf
, "%hu\n", ddb_entry
->port
);
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
));
259 static int qla4xxx_tgt_dscvr(struct Scsi_Host
*shost
,
260 enum iscsi_tgt_dscvr type
, uint32_t enable
,
261 struct sockaddr
*dst_addr
)
263 struct scsi_qla_host
*ha
;
264 struct sockaddr_in
*addr
;
265 struct sockaddr_in6
*addr6
;
268 ha
= (struct scsi_qla_host
*) shost
->hostdata
;
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
)
277 } else if (dst_addr
->sa_family
== AF_INET6
) {
279 * TODO: fix qla4xxx_send_tgts
281 addr6
= (struct sockaddr_in6
*)dst_addr
;
282 if (qla4xxx_send_tgts(ha
, (char *)&addr6
->sin6_addr
,
283 addr6
->sin6_port
) != QLA_SUCCESS
)
294 void qla4xxx_destroy_sess(struct ddb_entry
*ddb_entry
)
296 if (!ddb_entry
->sess
)
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
);
304 iscsi_free_session(ddb_entry
->sess
);
307 int qla4xxx_add_sess(struct ddb_entry
*ddb_entry
)
311 err
= iscsi_add_session(ddb_entry
->sess
, ddb_entry
->fw_ddb_index
);
313 DEBUG2(printk(KERN_ERR
"Could not add session.\n"));
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"));
324 ddb_entry
->sess
->recovery_tmo
= ddb_entry
->ha
->port_down_retry_count
;
325 iscsi_if_create_session_done(ddb_entry
->conn
);
329 struct ddb_entry
*qla4xxx_alloc_sess(struct scsi_qla_host
*ha
)
331 struct ddb_entry
*ddb_entry
;
332 struct iscsi_cls_session
*sess
;
334 sess
= iscsi_alloc_session(ha
->host
, &qla4xxx_iscsi_transport
);
338 ddb_entry
= sess
->dd_data
;
339 memset(ddb_entry
, 0, sizeof(*ddb_entry
));
341 ddb_entry
->sess
= sess
;
349 static void qla4xxx_start_timer(struct scsi_qla_host
*ha
, void *func
,
350 unsigned long interval
)
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;
362 static void qla4xxx_stop_timer(struct scsi_qla_host
*ha
)
364 del_timer_sync(&ha
->timer
);
365 ha
->timer_active
= 0;
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
373 * This routine marks a device missing and resets the relogin retry count.
375 void qla4xxx_mark_device_missing(struct scsi_qla_host
*ha
,
376 struct ddb_entry
*ddb_entry
)
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
);
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
*))
392 srb
= mempool_alloc(ha
->srb_mempool
, GFP_ATOMIC
);
396 atomic_set(&srb
->ref_count
, 1);
398 srb
->ddb
= ddb_entry
;
401 cmd
->SCp
.ptr
= (void *)srb
;
402 cmd
->scsi_done
= done
;
407 static void qla4xxx_srb_free_dma(struct scsi_qla_host
*ha
, struct srb
*srb
)
409 struct scsi_cmnd
*cmd
= srb
->cmd
;
411 if (srb
->flags
& SRB_DMA_VALID
) {
413 srb
->flags
&= ~SRB_DMA_VALID
;
418 void qla4xxx_srb_compl(struct scsi_qla_host
*ha
, struct srb
*srb
)
420 struct scsi_cmnd
*cmd
= srb
->cmd
;
422 qla4xxx_srb_free_dma(ha
, srb
);
424 mempool_free(srb
, ha
->srb_mempool
);
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.
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!.
443 static int qla4xxx_queuecommand(struct scsi_cmnd
*cmd
,
444 void (*done
)(struct scsi_cmnd
*))
446 struct scsi_qla_host
*ha
= to_qla_host(cmd
->device
->host
);
447 struct ddb_entry
*ddb_entry
= cmd
->device
->hostdata
;
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
;
459 if (test_bit(DPC_RESET_HA_INTR
, &ha
->dpc_flags
))
462 spin_unlock_irq(ha
->host
->host_lock
);
464 srb
= qla4xxx_get_new_srb(ha
, ddb_entry
, cmd
, done
);
466 goto qc_host_busy_lock
;
468 rval
= qla4xxx_send_command_to_isp(ha
, srb
);
469 if (rval
!= QLA_SUCCESS
)
470 goto qc_host_busy_free_sp
;
472 spin_lock_irq(ha
->host
->host_lock
);
475 qc_host_busy_free_sp
:
476 qla4xxx_srb_free_dma(ha
, srb
);
477 mempool_free(srb
, ha
->srb_mempool
);
480 spin_lock_irq(ha
->host
->host_lock
);
483 return SCSI_MLQUEUE_HOST_BUSY
;
492 * qla4xxx_mem_free - frees memory allocated to adapter
493 * @ha: Pointer to host adapter structure.
495 * Frees memory previously allocated by qla4xxx_mem_alloc
497 static void qla4xxx_mem_free(struct scsi_qla_host
*ha
)
500 dma_free_coherent(&ha
->pdev
->dev
, ha
->queues_len
, ha
->queues
,
506 ha
->request_ring
= NULL
;
508 ha
->response_ring
= NULL
;
509 ha
->response_dma
= 0;
510 ha
->shadow_regs
= NULL
;
511 ha
->shadow_regs_dma
= 0;
515 mempool_destroy(ha
->srb_mempool
);
517 ha
->srb_mempool
= NULL
;
519 /* release io space registers */
522 pci_release_regions(ha
->pdev
);
526 * qla4xxx_mem_alloc - allocates memory for use by adapter.
527 * @ha: Pointer to host adapter structure
529 * Allocates DMA memory for request and response queues. Also allocates memory
532 static int qla4xxx_mem_alloc(struct scsi_qla_host
*ha
)
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
) +
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");
548 goto mem_alloc_error_exit
;
550 memset(ha
->queues
, 0, ha
->queues_len
);
553 * As per RISC alignment requirements -- the bus-address must be a
554 * multiple of the request-ring size (in bytes).
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));
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
*
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
*
575 (RESPONSE_QUEUE_DEPTH
*
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");
585 goto mem_alloc_error_exit
;
590 mem_alloc_error_exit
:
591 qla4xxx_mem_free(ha
);
596 * qla4xxx_timer - checks every second for work to do.
597 * @ha: Pointer to host adapter structure.
599 static void qla4xxx_timer(struct scsi_qla_host
*ha
)
601 struct ddb_entry
*ddb_entry
, *dtemp
;
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
) !=
612 if (atomic_read(&ddb_entry
->retry_relogin_timer
)
614 atomic_set(&ddb_entry
->
617 set_bit(DPC_RELOGIN_DEVICE
,
619 set_bit(DF_RELOGIN
, &ddb_entry
->flags
);
620 DEBUG2(printk("scsi%ld: %s: index [%d]"
622 ha
->host_no
, __func__
,
623 ddb_entry
->fw_ddb_index
));
625 atomic_dec(&ddb_entry
->
626 retry_relogin_timer
);
630 /* Wait for relogin to timeout */
631 if (atomic_read(&ddb_entry
->relogin_timer
) &&
632 (atomic_dec_and_test(&ddb_entry
->relogin_timer
) != 0)) {
634 * If the relogin times out and the device is
635 * still NOT ONLINE then try and relogin again.
637 if (atomic_read(&ddb_entry
->state
) !=
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"
647 ddb_entry
->fw_ddb_index
,
648 atomic_read(&ddb_entry
->
649 relogin_retry_count
))
652 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
653 "initate relogin after"
655 ha
->host_no
, ddb_entry
->bus
,
657 ddb_entry
->fw_ddb_index
,
658 ddb_entry
->default_time2wait
+ 4)
661 atomic_set(&ddb_entry
->retry_relogin_timer
,
662 ddb_entry
->default_time2wait
+ 4);
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
);
677 /* Wakeup the dpc routine for this adapter, if needed. */
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
)) &&
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
);
693 /* Reschedule timer thread to call us back in one second */
694 mod_timer(&ha
->timer
, jiffies
+ HZ
);
696 DEBUG2(ha
->seconds_since_last_intr
++);
700 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
701 * @ha: Pointer to host adapter structure.
703 * This routine stalls the driver until all outstanding commands are returned.
704 * Caller must release the Hardware Lock prior to calling this routine.
706 static int qla4xxx_cmd_wait(struct scsi_qla_host
*ha
)
709 int stat
= QLA_SUCCESS
;
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
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
);
726 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
728 /* If No Commands are pending, wait is complete */
729 if (index
== ha
->host
->can_queue
) {
733 /* If we timed out on waiting for commands to come back
742 } /* End of While (wait_cnt) */
747 void qla4xxx_hw_reset(struct scsi_qla_host
*ha
)
749 uint32_t ctrl_status
;
750 unsigned long flags
= 0;
752 DEBUG2(printk(KERN_ERR
"scsi%ld: %s\n", ha
->host_no
, __func__
));
754 spin_lock_irqsave(&ha
->hardware_lock
, flags
);
757 * If the SCSI Reset Interrupt bit is set, clear it.
758 * Otherwise, the Soft Reset won't work.
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
);
764 /* Issue Soft Reset */
765 writel(set_rmask(CSR_SOFT_RESET
), &ha
->reg
->ctrl_status
);
766 readl(&ha
->reg
->ctrl_status
);
768 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
772 * qla4xxx_soft_reset - performs soft reset.
773 * @ha: Pointer to host adapter structure.
775 int qla4xxx_soft_reset(struct scsi_qla_host
*ha
)
777 uint32_t max_wait_time
;
778 unsigned long flags
= 0;
779 int status
= QLA_ERROR
;
780 uint32_t ctrl_status
;
782 qla4xxx_hw_reset(ha
);
784 /* Wait until the Network Reset Intr bit is cleared */
785 max_wait_time
= RESET_INTR_TOV
;
787 spin_lock_irqsave(&ha
->hardware_lock
, flags
);
788 ctrl_status
= readw(&ha
->reg
->ctrl_status
);
789 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
791 if ((ctrl_status
& CSR_NET_RESET_INTR
) == 0)
795 } while ((--max_wait_time
));
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",
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
);
808 /* Wait until the firmware tells us the Soft Reset is done */
809 max_wait_time
= SOFT_RESET_TOV
;
811 spin_lock_irqsave(&ha
->hardware_lock
, flags
);
812 ctrl_status
= readw(&ha
->reg
->ctrl_status
);
813 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
815 if ((ctrl_status
& CSR_SOFT_RESET
) == 0) {
816 status
= QLA_SUCCESS
;
821 } while ((--max_wait_time
));
824 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
825 * after the soft reset has taken place.
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
);
833 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
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.
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
;
850 spin_lock_irqsave(&ha
->hardware_lock
, flags
);
851 ctrl_status
= readw(&ha
->reg
->ctrl_status
);
852 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
854 if ((ctrl_status
& CSR_FORCE_SOFT_RESET
) == 0) {
855 status
= QLA_SUCCESS
;
860 } while ((--max_wait_time
));
867 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
868 * @ha: Pointer to host adapter structure.
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.
875 static void qla4xxx_flush_active_srbs(struct scsi_qla_host
*ha
)
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
);
885 srb
->cmd
->result
= DID_RESET
<< 16;
886 qla4xxx_srb_compl(ha
, srb
);
889 spin_unlock_irqrestore(&ha
->hardware_lock
, flags
);
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
900 static int qla4xxx_recover_adapter(struct scsi_qla_host
*ha
,
901 uint8_t renew_ddb_list
)
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
,
910 /* Wait for outstanding commands to complete.
911 * Stalls the driver for max 30 secs
913 status
= qla4xxx_cmd_wait(ha
);
915 qla4xxx_disable_intrs(ha
);
917 /* Flush any pending ddb changed AENs */
918 qla4xxx_process_aen(ha
, FLUSH_DDB_CHANGED_AENS
);
920 /* Reset the firmware. If successful, function
921 * returns with ISP interrupts enabled.
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
);
933 /* Flush any pending ddb changed AENs */
934 qla4xxx_process_aen(ha
, FLUSH_DDB_CHANGED_AENS
);
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__
));
942 /* If successful, AF_ONLINE flag set in
943 * qla4xxx_initialize_adapter */
944 status
= qla4xxx_initialize_adapter(ha
, renew_ddb_list
);
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
);
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",
967 ha
->retry_reset_ha_cnt
));
971 if (ha
->retry_reset_ha_cnt
== 0) {
972 /* Recover adapter retries have been exhausted.
974 DEBUG2(printk("scsi%ld: recover adapter "
975 "failed - board disabled\n",
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
,
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
);
991 ha
->adapter_error_count
++;
993 if (status
== QLA_SUCCESS
)
994 qla4xxx_enable_intrs(ha
);
996 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha
->host_no
));
1001 * qla4xxx_do_dpc - dpc routine
1002 * @data: in our case pointer to adapter structure
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.
1011 static void qla4xxx_do_dpc(struct work_struct
*work
)
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
;
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
)));
1023 /* Initialization not yet finished. Don't do anything yet. */
1024 if (!test_bit(AF_INIT_DONE
, &ha
->flags
))
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
);
1035 if (test_bit(DPC_RESET_HA_INTR
, &ha
->dpc_flags
)) {
1036 uint8_t wait_time
= RESET_INTR_TOV
;
1038 while ((readw(&ha
->reg
->ctrl_status
) &
1039 (CSR_SOFT_RESET
| CSR_FORCE_SOFT_RESET
)) != 0) {
1040 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
,
1054 clear_bit(DPC_RESET_HA_INTR
, &ha
->dpc_flags
);
1055 if (status
== QLA_SUCCESS
)
1056 qla4xxx_enable_intrs(ha
);
1060 /* ---- process AEN? --- */
1061 if (test_and_clear_bit(DPC_AEN
, &ha
->dpc_flags
))
1062 qla4xxx_process_aen(ha
, PROCESS_ALL_AENS
);
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
);
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
);
1078 * If mbx cmd times out there is no point
1079 * in continuing further.
1080 * With large no of targets this can hang
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__
);
1094 * qla4xxx_free_adapter - release the adapter
1095 * @ha: pointer to adapter structure
1097 static void qla4xxx_free_adapter(struct scsi_qla_host
*ha
)
1100 if (test_bit(AF_INTERRUPTS_ON
, &ha
->flags
)) {
1101 /* Turn-off interrupts on the card. */
1102 qla4xxx_disable_intrs(ha
);
1105 /* Kill the kernel thread for this host */
1107 destroy_workqueue(ha
->dpc_thread
);
1109 /* Issue Soft Reset to put firmware in unknown state */
1110 if (ql4xxx_lock_drvr_wait(ha
) == QLA_SUCCESS
)
1111 qla4xxx_hw_reset(ha
);
1113 /* Remove timer thread, if present */
1114 if (ha
->timer_active
)
1115 qla4xxx_stop_timer(ha
);
1117 /* Detach interrupts */
1118 if (test_and_clear_bit(AF_IRQ_ATTACHED
, &ha
->flags
))
1119 free_irq(ha
->pdev
->irq
, ha
);
1121 /* free extra memory */
1122 qla4xxx_mem_free(ha
);
1124 pci_disable_device(ha
->pdev
);
1129 * qla4xxx_iospace_config - maps registers
1130 * @ha: pointer to adapter structure
1132 * This routines maps HBA's registers from the pci address space
1133 * into the kernel virtual address space for memory mapped i/o.
1135 static int qla4xxx_iospace_config(struct scsi_qla_host
*ha
)
1137 unsigned long pio
, pio_len
, pio_flags
;
1138 unsigned long mmio
, mmio_len
, mmio_flags
;
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");
1150 dev_warn(&ha
->pdev
->dev
, "region #0 not a PIO resource\n");
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);
1159 if (!(mmio_flags
& IORESOURCE_MEM
)) {
1160 dev_err(&ha
->pdev
->dev
,
1161 "region #0 not an MMIO resource, aborting\n");
1163 goto iospace_error_exit
;
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
;
1171 if (pci_request_regions(ha
->pdev
, DRIVER_NAME
)) {
1172 dev_warn(&ha
->pdev
->dev
,
1173 "Failed to reserve PIO/MMIO regions\n");
1175 goto iospace_error_exit
;
1178 ha
->pio_address
= pio
;
1179 ha
->pio_length
= pio_len
;
1180 ha
->reg
= ioremap(mmio
, MIN_IOBASE_LEN
);
1182 dev_err(&ha
->pdev
->dev
,
1183 "cannot remap MMIO, aborting\n");
1185 goto iospace_error_exit
;
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
1199 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1200 * It returns zero if successful. It also initializes all data necessary for
1203 static int __devinit
qla4xxx_probe_adapter(struct pci_dev
*pdev
,
1204 const struct pci_device_id
*ent
)
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;
1213 if (pci_enable_device(pdev
))
1216 host
= scsi_host_alloc(&qla4xxx_driver_template
, sizeof(*ha
));
1219 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1220 goto probe_disable_device
;
1223 /* Clear our data area */
1224 ha
= (struct scsi_qla_host
*) host
->hostdata
;
1225 memset(ha
, 0, sizeof(*ha
));
1227 /* Save the information from PCI BIOS. */
1230 ha
->host_no
= host
->host_no
;
1232 /* Configure PCI I/O space. */
1233 ret
= qla4xxx_iospace_config(ha
);
1237 dev_info(&ha
->pdev
->dev
, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1238 pdev
->device
, pdev
->irq
, ha
->reg
);
1240 qla4xxx_config_dma_addressing(ha
);
1242 /* Initialize lists and spinlocks. */
1243 INIT_LIST_HEAD(&ha
->ddb_list
);
1244 INIT_LIST_HEAD(&ha
->free_srb_q
);
1246 mutex_init(&ha
->mbox_sem
);
1248 spin_lock_init(&ha
->hardware_lock
);
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");
1260 * Initialize the Host adapter request/response queues and
1262 * NOTE: interrupts enabled upon successful completion
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
);
1271 if (status
== QLA_ERROR
) {
1272 dev_warn(&ha
->pdev
->dev
, "Failed to initialize adapter\n");
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
;
1286 ret
= scsi_init_shared_tag_map(host
, MAX_SRBS
);
1288 dev_warn(&ha
->pdev
->dev
, "scsi_init_shared_tag_map failed");
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");
1302 INIT_WORK(&ha
->dpc_work
, qla4xxx_do_dpc
);
1304 ret
= request_irq(pdev
->irq
, qla4xxx_intr_handler
,
1305 IRQF_DISABLED
| IRQF_SHARED
, "qla4xxx", ha
);
1307 dev_warn(&ha
->pdev
->dev
, "Failed to reserve interrupt %d"
1308 " already in use.\n", pdev
->irq
);
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
));
1315 qla4xxx_enable_intrs(ha
);
1317 /* Start timer thread. */
1318 qla4xxx_start_timer(ha
, qla4xxx_timer
, 1);
1320 set_bit(AF_INIT_DONE
, &ha
->flags
);
1322 pci_set_drvdata(pdev
, ha
);
1324 ret
= scsi_add_host(host
, &pdev
->dev
);
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
))
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
);
1345 qla4xxx_free_ddb_list(ha
);
1346 scsi_remove_host(host
);
1349 qla4xxx_free_adapter(ha
);
1350 scsi_host_put(ha
->host
);
1352 probe_disable_device
:
1353 pci_disable_device(pdev
);
1359 * qla4xxx_remove_adapter - calback function to remove adapter.
1360 * @pci_dev: PCI device pointer
1362 static void __devexit
qla4xxx_remove_adapter(struct pci_dev
*pdev
)
1364 struct scsi_qla_host
*ha
;
1366 ha
= pci_get_drvdata(pdev
);
1368 qla4xxx_disable_intrs(ha
);
1370 while (test_bit(DPC_RESET_HA_INTR
, &ha
->dpc_flags
))
1373 /* remove devs from iscsi_sessions to scsi_devices */
1374 qla4xxx_free_ddb_list(ha
);
1376 scsi_remove_host(ha
->host
);
1378 qla4xxx_free_adapter(ha
);
1380 scsi_host_put(ha
->host
);
1382 pci_set_drvdata(pdev
, NULL
);
1386 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1389 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1390 * supported addressing method.
1392 static void qla4xxx_config_dma_addressing(struct scsi_qla_host
*ha
)
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; "
1402 retval
= pci_set_consistent_dma_mask(ha
->pdev
,
1406 retval
= pci_set_dma_mask(ha
->pdev
, DMA_32BIT_MASK
);
1409 static int qla4xxx_slave_alloc(struct scsi_device
*sdev
)
1411 struct iscsi_cls_session
*sess
= starget_to_session(sdev
->sdev_target
);
1412 struct ddb_entry
*ddb
= sess
->dd_data
;
1414 sdev
->hostdata
= ddb
;
1415 sdev
->tagged_supported
= 1;
1416 scsi_activate_tcq(sdev
, sdev
->host
->can_queue
);
1420 static int qla4xxx_slave_configure(struct scsi_device
*sdev
)
1422 sdev
->tagged_supported
= 1;
1426 static void qla4xxx_slave_destroy(struct scsi_device
*sdev
)
1428 scsi_deactivate_tcq(sdev
, 1);
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
1436 * This routine removes and returns the srb at the specified index
1438 struct srb
* qla4xxx_del_from_active_array(struct scsi_qla_host
*ha
, uint32_t index
)
1440 struct srb
*srb
= NULL
;
1441 struct scsi_cmnd
*cmd
;
1443 if (!(cmd
= scsi_host_find_tag(ha
->host
, index
)))
1446 if (!(srb
= (struct srb
*)cmd
->host_scribble
))
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
;
1454 srb
->cmd
->host_scribble
= NULL
;
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.
1464 * This routine waits for the command to be returned by the Firmware
1465 * for some max time.
1467 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host
*ha
,
1468 struct scsi_cmnd
*cmd
)
1472 uint32_t max_wait_time
= EH_WAIT_CMD_TOV
;
1475 /* Checking to see if its returned to OS */
1476 rp
= (struct srb
*) cmd
->SCp
.ptr
;
1483 } while (max_wait_time
--);
1489 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1490 * @ha: Pointer to host adapter structure
1492 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host
*ha
)
1494 unsigned long wait_online
;
1496 wait_online
= jiffies
+ (30 * HZ
);
1497 while (time_before(jiffies
, wait_online
)) {
1501 else if (ha
->retry_reset_ha_cnt
== 0)
1511 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1512 * @ha: pointer to to HBA
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.
1519 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host
*ha
,
1524 struct scsi_cmnd
*cmd
;
1527 * Waiting for all commands for the designated target in the active
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
)) {
1543 * qla4xxx_eh_device_reset - callback for target reset.
1544 * @cmd: Pointer to Linux's SCSI command structure
1546 * This routine is called by the Linux OS to reset all luns on the
1549 static int qla4xxx_eh_device_reset(struct scsi_cmnd
*cmd
)
1551 struct scsi_qla_host
*ha
= to_qla_host(cmd
->device
->host
);
1552 struct ddb_entry
*ddb_entry
= cmd
->device
->hostdata
;
1554 int ret
= FAILED
, stat
;
1556 sp
= (struct srb
*) cmd
->SCp
.ptr
;
1557 if (!sp
|| !ddb_entry
)
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
);
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
));
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
;
1578 ha
->marker_needed
= 1;
1581 * If we are coming down the EH path, wait for all commands to complete
1584 if (cmd
->device
->host
->shost_state
== SHOST_RECOVERY
) {
1585 if (qla4xxx_eh_wait_for_active_target_commands(ha
,
1588 dev_info(&ha
->pdev
->dev
,
1589 "DEVICE RESET FAILED - waiting for "
1591 goto eh_dev_reset_done
;
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
,
1608 * qla4xxx_eh_host_reset - kernel callback
1609 * @cmd: Pointer to Linux's SCSI command structure
1611 * This routine is invoked by the Linux kernel to perform fatal error
1612 * recovery on the specified adapter.
1614 static int qla4xxx_eh_host_reset(struct scsi_cmnd
*cmd
)
1616 int return_status
= FAILED
;
1617 struct scsi_qla_host
*ha
;
1619 ha
= (struct scsi_qla_host
*) cmd
->device
->host
->hostdata
;
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
);
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
,
1633 if (qla4xxx_recover_adapter(ha
, PRESERVE_DDB_LIST
) == QLA_SUCCESS
) {
1634 return_status
= SUCCESS
;
1637 dev_info(&ha
->pdev
->dev
, "HOST RESET %s.\n",
1638 return_status
== FAILED
? "FAILED" : "SUCCEDED");
1640 return return_status
;
1644 static struct pci_device_id qla4xxx_pci_tbl
[] = {
1646 .vendor
= PCI_VENDOR_ID_QLOGIC
,
1647 .device
= PCI_DEVICE_ID_QLOGIC_ISP4010
,
1648 .subvendor
= PCI_ANY_ID
,
1649 .subdevice
= PCI_ANY_ID
,
1652 .vendor
= PCI_VENDOR_ID_QLOGIC
,
1653 .device
= PCI_DEVICE_ID_QLOGIC_ISP4022
,
1654 .subvendor
= PCI_ANY_ID
,
1655 .subdevice
= PCI_ANY_ID
,
1658 .vendor
= PCI_VENDOR_ID_QLOGIC
,
1659 .device
= PCI_DEVICE_ID_QLOGIC_ISP4032
,
1660 .subvendor
= PCI_ANY_ID
,
1661 .subdevice
= PCI_ANY_ID
,
1665 MODULE_DEVICE_TABLE(pci
, qla4xxx_pci_tbl
);
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
,
1674 static int __init
qla4xxx_module_init(void)
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
) {
1683 "%s: Unable to allocate SRB cache..."
1684 "Failing load!\n", DRIVER_NAME
);
1689 /* Derive version string. */
1690 strcpy(qla4xxx_version_str
, QLA4XXX_DRIVER_VERSION
);
1691 if (ql4xextended_error_logging
)
1692 strcat(qla4xxx_version_str
, "-debug");
1694 qla4xxx_scsi_transport
=
1695 iscsi_register_transport(&qla4xxx_iscsi_transport
);
1696 if (!qla4xxx_scsi_transport
){
1698 goto release_srb_cache
;
1701 ret
= pci_register_driver(&qla4xxx_pci_driver
);
1703 goto unregister_transport
;
1705 printk(KERN_INFO
"QLogic iSCSI HBA Driver\n");
1708 unregister_transport
:
1709 iscsi_unregister_transport(&qla4xxx_iscsi_transport
);
1711 kmem_cache_destroy(srb_cachep
);
1716 static void __exit
qla4xxx_module_exit(void)
1719 pci_unregister_driver(&qla4xxx_pci_driver
);
1720 iscsi_unregister_transport(&qla4xxx_iscsi_transport
);
1721 kmem_cache_destroy(srb_cachep
);
1724 module_init(qla4xxx_module_init
);
1725 module_exit(qla4xxx_module_exit
);
1727 MODULE_AUTHOR("QLogic Corporation");
1728 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1729 MODULE_LICENSE("GPL");
1730 MODULE_VERSION(QLA4XXX_DRIVER_VERSION
);