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[MIPS] update cobalt_defconfig
[pv_ops_mirror.git] / drivers / scsi / qla4xxx / ql4_os.c
blobda21f5fbbf87cbb6f6c2c8502fbdd41a97551d59
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
14 /*
15 * Driver version
16 */
17 static char qla4xxx_version_str[40];
18
19 /*
20 * SRB allocation cache
21 */
22 static struct kmem_cache *srb_cachep;
23
24 /*
25 * Module parameter information and variables
26 */
27 int ql4xdiscoverywait = 60;
28 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
29 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
30 int ql4xdontresethba = 0;
31 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
32 MODULE_PARM_DESC(ql4xdontresethba,
33 "Dont reset the HBA when the driver gets 0x8002 AEN "
34 " default it will reset hba :0"
35 " set to 1 to avoid resetting HBA");
36
37 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
38 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
39 MODULE_PARM_DESC(ql4xextended_error_logging,
40 "Option to enable extended error logging, "
41 "Default is 0 - no logging, 1 - debug logging");
42
43 int ql4_mod_unload = 0;
44
45 /*
46 * SCSI host template entry points
47 */
48 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
49
50 /*
51 * iSCSI template entry points
52 */
53 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
54 uint32_t enable, struct sockaddr *dst_addr);
55 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
56 enum iscsi_param param, char *buf);
57 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
58 enum iscsi_param param, char *buf);
59 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
60 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
61 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
62
63 /*
64 * SCSI host template entry points
65 */
66 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
67 void (*done) (struct scsi_cmnd *));
68 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
69 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
70 static int qla4xxx_slave_alloc(struct scsi_device *device);
71 static int qla4xxx_slave_configure(struct scsi_device *device);
72 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
73
74 static struct scsi_host_template qla4xxx_driver_template = {
75 .module = THIS_MODULE,
76 .name = DRIVER_NAME,
77 .proc_name = DRIVER_NAME,
78 .queuecommand = qla4xxx_queuecommand,
79
80 .eh_device_reset_handler = qla4xxx_eh_device_reset,
81 .eh_host_reset_handler = qla4xxx_eh_host_reset,
82
83 .slave_configure = qla4xxx_slave_configure,
84 .slave_alloc = qla4xxx_slave_alloc,
85 .slave_destroy = qla4xxx_slave_destroy,
86
87 .this_id = -1,
88 .cmd_per_lun = 3,
89 .use_clustering = ENABLE_CLUSTERING,
90 .sg_tablesize = SG_ALL,
91
92 .max_sectors = 0xFFFF,
93 };
94
95 static struct iscsi_transport qla4xxx_iscsi_transport = {
96 .owner = THIS_MODULE,
97 .name = DRIVER_NAME,
98 .param_mask = ISCSI_CONN_PORT |
99 ISCSI_CONN_ADDRESS |
100 ISCSI_TARGET_NAME |
101 ISCSI_TPGT,
102 .sessiondata_size = sizeof(struct ddb_entry),
103 .host_template = &qla4xxx_driver_template,
104
105 .tgt_dscvr = qla4xxx_tgt_dscvr,
106 .get_conn_param = qla4xxx_conn_get_param,
107 .get_session_param = qla4xxx_sess_get_param,
108 .start_conn = qla4xxx_conn_start,
109 .stop_conn = qla4xxx_conn_stop,
110 .session_recovery_timedout = qla4xxx_recovery_timedout,
111 };
112
113 static struct scsi_transport_template *qla4xxx_scsi_transport;
114
115 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
116 {
117 struct ddb_entry *ddb_entry = session->dd_data;
118 struct scsi_qla_host *ha = ddb_entry->ha;
119
120 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
121 "secs exhausted, marking device DEAD.\n", ha->host_no,
122 __func__, ddb_entry->fw_ddb_index,
123 ha->port_down_retry_count));
124
125 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
126
127 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
128 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
129 queue_work(ha->dpc_thread, &ha->dpc_work);
130 }
131
132 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
133 {
134 struct iscsi_cls_session *session;
135 struct ddb_entry *ddb_entry;
136
137 session = iscsi_dev_to_session(conn->dev.parent);
138 ddb_entry = session->dd_data;
139
140 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
141 ddb_entry->ha->host_no, __func__,
142 ddb_entry->fw_ddb_index));
143 iscsi_unblock_session(session);
144 return 0;
145 }
146
147 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
148 {
149 struct iscsi_cls_session *session;
150 struct ddb_entry *ddb_entry;
151
152 session = iscsi_dev_to_session(conn->dev.parent);
153 ddb_entry = session->dd_data;
154
155 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
156 ddb_entry->ha->host_no, __func__,
157 ddb_entry->fw_ddb_index));
158 if (flag == STOP_CONN_RECOVER)
159 iscsi_block_session(session);
160 else
161 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
162 }
163
164 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
165 enum iscsi_param param, char *buf)
166 {
167 struct ddb_entry *ddb_entry = sess->dd_data;
168 int len;
169
170 switch (param) {
171 case ISCSI_PARAM_TARGET_NAME:
172 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
173 ddb_entry->iscsi_name);
174 break;
175 case ISCSI_PARAM_TPGT:
176 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
177 break;
178 default:
179 return -ENOSYS;
180 }
181
182 return len;
183 }
184
185 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
186 enum iscsi_param param, char *buf)
187 {
188 struct iscsi_cls_session *session;
189 struct ddb_entry *ddb_entry;
190 int len;
191
192 session = iscsi_dev_to_session(conn->dev.parent);
193 ddb_entry = session->dd_data;
194
195 switch (param) {
196 case ISCSI_PARAM_CONN_PORT:
197 len = sprintf(buf, "%hu\n", ddb_entry->port);
198 break;
199 case ISCSI_PARAM_CONN_ADDRESS:
200 /* TODO: what are the ipv6 bits */
201 len = sprintf(buf, "%u.%u.%u.%u\n",
202 NIPQUAD(ddb_entry->ip_addr));
203 break;
204 default:
205 return -ENOSYS;
206 }
207
208 return len;
209 }
210
211 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
212 uint32_t enable, struct sockaddr *dst_addr)
213 {
214 struct scsi_qla_host *ha;
215 struct Scsi_Host *shost;
216 struct sockaddr_in *addr;
217 struct sockaddr_in6 *addr6;
218 int ret = 0;
219
220 shost = scsi_host_lookup(host_no);
221 if (IS_ERR(shost)) {
222 printk(KERN_ERR "Could not find host no %u\n", host_no);
223 return -ENODEV;
224 }
225
226 ha = (struct scsi_qla_host *) shost->hostdata;
227
228 switch (type) {
229 case ISCSI_TGT_DSCVR_SEND_TARGETS:
230 if (dst_addr->sa_family == AF_INET) {
231 addr = (struct sockaddr_in *)dst_addr;
232 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
233 addr->sin_port) != QLA_SUCCESS)
234 ret = -EIO;
235 } else if (dst_addr->sa_family == AF_INET6) {
236 /*
237 * TODO: fix qla4xxx_send_tgts
238 */
239 addr6 = (struct sockaddr_in6 *)dst_addr;
240 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
241 addr6->sin6_port) != QLA_SUCCESS)
242 ret = -EIO;
243 } else
244 ret = -ENOSYS;
245 break;
246 default:
247 ret = -ENOSYS;
248 }
249
250 scsi_host_put(shost);
251 return ret;
252 }
253
254 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
255 {
256 if (!ddb_entry->sess)
257 return;
258
259 if (ddb_entry->conn) {
260 iscsi_if_destroy_session_done(ddb_entry->conn);
261 iscsi_destroy_conn(ddb_entry->conn);
262 iscsi_remove_session(ddb_entry->sess);
263 }
264 iscsi_free_session(ddb_entry->sess);
265 }
266
267 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
268 {
269 int err;
270
271 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
272 if (err) {
273 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
274 return err;
275 }
276
277 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
278 if (!ddb_entry->conn) {
279 iscsi_remove_session(ddb_entry->sess);
280 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
281 return -ENOMEM;
282 }
283
284 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
285 iscsi_if_create_session_done(ddb_entry->conn);
286 return 0;
287 }
288
289 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
290 {
291 struct ddb_entry *ddb_entry;
292 struct iscsi_cls_session *sess;
293
294 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
295 if (!sess)
296 return NULL;
297
298 ddb_entry = sess->dd_data;
299 memset(ddb_entry, 0, sizeof(*ddb_entry));
300 ddb_entry->ha = ha;
301 ddb_entry->sess = sess;
302 return ddb_entry;
303 }
304
305 /*
306 * Timer routines
307 */
308
309 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
310 unsigned long interval)
311 {
312 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
313 __func__, ha->host->host_no));
314 init_timer(&ha->timer);
315 ha->timer.expires = jiffies + interval * HZ;
316 ha->timer.data = (unsigned long)ha;
317 ha->timer.function = (void (*)(unsigned long))func;
318 add_timer(&ha->timer);
319 ha->timer_active = 1;
320 }
321
322 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
323 {
324 del_timer_sync(&ha->timer);
325 ha->timer_active = 0;
326 }
327
328 /***
329 * qla4xxx_mark_device_missing - mark a device as missing.
330 * @ha: Pointer to host adapter structure.
331 * @ddb_entry: Pointer to device database entry
332 *
333 * This routine marks a device missing and resets the relogin retry count.
334 **/
335 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
336 struct ddb_entry *ddb_entry)
337 {
338 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
339 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
340 ha->host_no, ddb_entry->bus, ddb_entry->target,
341 ddb_entry->fw_ddb_index));
342 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
343 }
344
345 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
346 struct ddb_entry *ddb_entry,
347 struct scsi_cmnd *cmd,
348 void (*done)(struct scsi_cmnd *))
349 {
350 struct srb *srb;
351
352 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
353 if (!srb)
354 return srb;
355
356 atomic_set(&srb->ref_count, 1);
357 srb->ha = ha;
358 srb->ddb = ddb_entry;
359 srb->cmd = cmd;
360 srb->flags = 0;
361 cmd->SCp.ptr = (void *)srb;
362 cmd->scsi_done = done;
363
364 return srb;
365 }
366
367 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
368 {
369 struct scsi_cmnd *cmd = srb->cmd;
370
371 if (srb->flags & SRB_DMA_VALID) {
372 if (cmd->use_sg) {
373 pci_unmap_sg(ha->pdev, cmd->request_buffer,
374 cmd->use_sg, cmd->sc_data_direction);
375 } else if (cmd->request_bufflen) {
376 pci_unmap_single(ha->pdev, srb->dma_handle,
377 cmd->request_bufflen,
378 cmd->sc_data_direction);
379 }
380 srb->flags &= ~SRB_DMA_VALID;
381 }
382 cmd->SCp.ptr = NULL;
383 }
384
385 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
386 {
387 struct scsi_cmnd *cmd = srb->cmd;
388
389 qla4xxx_srb_free_dma(ha, srb);
390
391 mempool_free(srb, ha->srb_mempool);
392
393 cmd->scsi_done(cmd);
394 }
395
396 /**
397 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
398 * @cmd: Pointer to Linux's SCSI command structure
399 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
400 * that the command has been processed.
401 *
402 * Remarks:
403 * This routine is invoked by Linux to send a SCSI command to the driver.
404 * The mid-level driver tries to ensure that queuecommand never gets
405 * invoked concurrently with itself or the interrupt handler (although
406 * the interrupt handler may call this routine as part of request-
407 * completion handling). Unfortunely, it sometimes calls the scheduler
408 * in interrupt context which is a big NO! NO!.
409 **/
410 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
411 void (*done)(struct scsi_cmnd *))
412 {
413 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
414 struct ddb_entry *ddb_entry = cmd->device->hostdata;
415 struct srb *srb;
416 int rval;
417
418 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
419 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
420 cmd->result = DID_NO_CONNECT << 16;
421 goto qc_fail_command;
422 }
423 goto qc_host_busy;
424 }
425
426 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
427 goto qc_host_busy;
428
429 spin_unlock_irq(ha->host->host_lock);
430
431 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
432 if (!srb)
433 goto qc_host_busy_lock;
434
435 rval = qla4xxx_send_command_to_isp(ha, srb);
436 if (rval != QLA_SUCCESS)
437 goto qc_host_busy_free_sp;
438
439 spin_lock_irq(ha->host->host_lock);
440 return 0;
441
442 qc_host_busy_free_sp:
443 qla4xxx_srb_free_dma(ha, srb);
444 mempool_free(srb, ha->srb_mempool);
445
446 qc_host_busy_lock:
447 spin_lock_irq(ha->host->host_lock);
448
449 qc_host_busy:
450 return SCSI_MLQUEUE_HOST_BUSY;
451
452 qc_fail_command:
453 done(cmd);
454
455 return 0;
456 }
457
458 /**
459 * qla4xxx_mem_free - frees memory allocated to adapter
460 * @ha: Pointer to host adapter structure.
461 *
462 * Frees memory previously allocated by qla4xxx_mem_alloc
463 **/
464 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
465 {
466 if (ha->queues)
467 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
468 ha->queues_dma);
469
470 ha->queues_len = 0;
471 ha->queues = NULL;
472 ha->queues_dma = 0;
473 ha->request_ring = NULL;
474 ha->request_dma = 0;
475 ha->response_ring = NULL;
476 ha->response_dma = 0;
477 ha->shadow_regs = NULL;
478 ha->shadow_regs_dma = 0;
479
480 /* Free srb pool. */
481 if (ha->srb_mempool)
482 mempool_destroy(ha->srb_mempool);
483
484 ha->srb_mempool = NULL;
485
486 /* release io space registers */
487 if (ha->reg)
488 iounmap(ha->reg);
489 pci_release_regions(ha->pdev);
490 }
491
492 /**
493 * qla4xxx_mem_alloc - allocates memory for use by adapter.
494 * @ha: Pointer to host adapter structure
495 *
496 * Allocates DMA memory for request and response queues. Also allocates memory
497 * for srbs.
498 **/
499 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
500 {
501 unsigned long align;
502
503 /* Allocate contiguous block of DMA memory for queues. */
504 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
505 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
506 sizeof(struct shadow_regs) +
507 MEM_ALIGN_VALUE +
508 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
509 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
510 &ha->queues_dma, GFP_KERNEL);
511 if (ha->queues == NULL) {
512 dev_warn(&ha->pdev->dev,
513 "Memory Allocation failed - queues.\n");
514
515 goto mem_alloc_error_exit;
516 }
517 memset(ha->queues, 0, ha->queues_len);
518
519 /*
520 * As per RISC alignment requirements -- the bus-address must be a
521 * multiple of the request-ring size (in bytes).
522 */
523 align = 0;
524 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
525 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
526 (MEM_ALIGN_VALUE - 1));
527
528 /* Update request and response queue pointers. */
529 ha->request_dma = ha->queues_dma + align;
530 ha->request_ring = (struct queue_entry *) (ha->queues + align);
531 ha->response_dma = ha->queues_dma + align +
532 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
533 ha->response_ring = (struct queue_entry *) (ha->queues + align +
534 (REQUEST_QUEUE_DEPTH *
535 QUEUE_SIZE));
536 ha->shadow_regs_dma = ha->queues_dma + align +
537 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
538 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
539 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
540 (REQUEST_QUEUE_DEPTH *
541 QUEUE_SIZE) +
542 (RESPONSE_QUEUE_DEPTH *
543 QUEUE_SIZE));
544
545 /* Allocate memory for srb pool. */
546 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
547 mempool_free_slab, srb_cachep);
548 if (ha->srb_mempool == NULL) {
549 dev_warn(&ha->pdev->dev,
550 "Memory Allocation failed - SRB Pool.\n");
551
552 goto mem_alloc_error_exit;
553 }
554
555 return QLA_SUCCESS;
556
557 mem_alloc_error_exit:
558 qla4xxx_mem_free(ha);
559 return QLA_ERROR;
560 }
561
562 /**
563 * qla4xxx_timer - checks every second for work to do.
564 * @ha: Pointer to host adapter structure.
565 **/
566 static void qla4xxx_timer(struct scsi_qla_host *ha)
567 {
568 struct ddb_entry *ddb_entry, *dtemp;
569 int start_dpc = 0;
570
571 /* Search for relogin's to time-out and port down retry. */
572 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
573 /* Count down time between sending relogins */
574 if (adapter_up(ha) &&
575 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
576 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
577 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
578 INVALID_ENTRY) {
579 if (atomic_read(&ddb_entry->retry_relogin_timer)
580 == 0) {
581 atomic_set(&ddb_entry->
582 retry_relogin_timer,
583 INVALID_ENTRY);
584 set_bit(DPC_RELOGIN_DEVICE,
585 &ha->dpc_flags);
586 set_bit(DF_RELOGIN, &ddb_entry->flags);
587 DEBUG2(printk("scsi%ld: %s: index [%d]"
588 " login device\n",
589 ha->host_no, __func__,
590 ddb_entry->fw_ddb_index));
591 } else
592 atomic_dec(&ddb_entry->
593 retry_relogin_timer);
594 }
595 }
596
597 /* Wait for relogin to timeout */
598 if (atomic_read(&ddb_entry->relogin_timer) &&
599 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
600 /*
601 * If the relogin times out and the device is
602 * still NOT ONLINE then try and relogin again.
603 */
604 if (atomic_read(&ddb_entry->state) !=
605 DDB_STATE_ONLINE &&
606 ddb_entry->fw_ddb_device_state ==
607 DDB_DS_SESSION_FAILED) {
608 /* Reset retry relogin timer */
609 atomic_inc(&ddb_entry->relogin_retry_count);
610 DEBUG2(printk("scsi%ld: index[%d] relogin"
611 " timed out-retrying"
612 " relogin (%d)\n",
613 ha->host_no,
614 ddb_entry->fw_ddb_index,
615 atomic_read(&ddb_entry->
616 relogin_retry_count))
617 );
618 start_dpc++;
619 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
620 "initate relogin after"
621 " %d seconds\n",
622 ha->host_no, ddb_entry->bus,
623 ddb_entry->target,
624 ddb_entry->fw_ddb_index,
625 ddb_entry->default_time2wait + 4)
626 );
627
628 atomic_set(&ddb_entry->retry_relogin_timer,
629 ddb_entry->default_time2wait + 4);
630 }
631 }
632 }
633
634 /* Check for heartbeat interval. */
635 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
636 ha->heartbeat_interval != 0) {
637 ha->seconds_since_last_heartbeat++;
638 if (ha->seconds_since_last_heartbeat >
639 ha->heartbeat_interval + 2)
640 set_bit(DPC_RESET_HA, &ha->dpc_flags);
641 }
642
643
644 /* Wakeup the dpc routine for this adapter, if needed. */
645 if ((start_dpc ||
646 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
647 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
648 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
649 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
650 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
651 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
652 test_bit(DPC_AEN, &ha->dpc_flags)) &&
653 ha->dpc_thread) {
654 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
655 " - dpc flags = 0x%lx\n",
656 ha->host_no, __func__, ha->dpc_flags));
657 queue_work(ha->dpc_thread, &ha->dpc_work);
658 }
659
660 /* Reschedule timer thread to call us back in one second */
661 mod_timer(&ha->timer, jiffies + HZ);
662
663 DEBUG2(ha->seconds_since_last_intr++);
664 }
665
666 /**
667 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
668 * @ha: Pointer to host adapter structure.
669 *
670 * This routine stalls the driver until all outstanding commands are returned.
671 * Caller must release the Hardware Lock prior to calling this routine.
672 **/
673 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
674 {
675 uint32_t index = 0;
676 int stat = QLA_SUCCESS;
677 unsigned long flags;
678 struct scsi_cmnd *cmd;
679 int wait_cnt = WAIT_CMD_TOV; /*
680 * Initialized for 30 seconds as we
681 * expect all commands to retuned
682 * ASAP.
683 */
684
685 while (wait_cnt) {
686 spin_lock_irqsave(&ha->hardware_lock, flags);
687 /* Find a command that hasn't completed. */
688 for (index = 0; index < ha->host->can_queue; index++) {
689 cmd = scsi_host_find_tag(ha->host, index);
690 if (cmd != NULL)
691 break;
692 }
693 spin_unlock_irqrestore(&ha->hardware_lock, flags);
694
695 /* If No Commands are pending, wait is complete */
696 if (index == ha->host->can_queue) {
697 break;
698 }
699
700 /* If we timed out on waiting for commands to come back
701 * return ERROR.
702 */
703 wait_cnt--;
704 if (wait_cnt == 0)
705 stat = QLA_ERROR;
706 else {
707 msleep(1000);
708 }
709 } /* End of While (wait_cnt) */
710
711 return stat;
712 }
713
714 static void qla4xxx_hw_reset(struct scsi_qla_host *ha)
715 {
716 uint32_t ctrl_status;
717 unsigned long flags = 0;
718
719 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
720
721 spin_lock_irqsave(&ha->hardware_lock, flags);
722
723 /*
724 * If the SCSI Reset Interrupt bit is set, clear it.
725 * Otherwise, the Soft Reset won't work.
726 */
727 ctrl_status = readw(&ha->reg->ctrl_status);
728 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
729 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
730
731 /* Issue Soft Reset */
732 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
733 readl(&ha->reg->ctrl_status);
734
735 spin_unlock_irqrestore(&ha->hardware_lock, flags);
736 }
737
738 /**
739 * qla4xxx_soft_reset - performs soft reset.
740 * @ha: Pointer to host adapter structure.
741 **/
742 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
743 {
744 uint32_t max_wait_time;
745 unsigned long flags = 0;
746 int status = QLA_ERROR;
747 uint32_t ctrl_status;
748
749 qla4xxx_hw_reset(ha);
750
751 /* Wait until the Network Reset Intr bit is cleared */
752 max_wait_time = RESET_INTR_TOV;
753 do {
754 spin_lock_irqsave(&ha->hardware_lock, flags);
755 ctrl_status = readw(&ha->reg->ctrl_status);
756 spin_unlock_irqrestore(&ha->hardware_lock, flags);
757
758 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
759 break;
760
761 msleep(1000);
762 } while ((--max_wait_time));
763
764 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
765 DEBUG2(printk(KERN_WARNING
766 "scsi%ld: Network Reset Intr not cleared by "
767 "Network function, clearing it now!\n",
768 ha->host_no));
769 spin_lock_irqsave(&ha->hardware_lock, flags);
770 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
771 readl(&ha->reg->ctrl_status);
772 spin_unlock_irqrestore(&ha->hardware_lock, flags);
773 }
774
775 /* Wait until the firmware tells us the Soft Reset is done */
776 max_wait_time = SOFT_RESET_TOV;
777 do {
778 spin_lock_irqsave(&ha->hardware_lock, flags);
779 ctrl_status = readw(&ha->reg->ctrl_status);
780 spin_unlock_irqrestore(&ha->hardware_lock, flags);
781
782 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
783 status = QLA_SUCCESS;
784 break;
785 }
786
787 msleep(1000);
788 } while ((--max_wait_time));
789
790 /*
791 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
792 * after the soft reset has taken place.
793 */
794 spin_lock_irqsave(&ha->hardware_lock, flags);
795 ctrl_status = readw(&ha->reg->ctrl_status);
796 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
797 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
798 readl(&ha->reg->ctrl_status);
799 }
800 spin_unlock_irqrestore(&ha->hardware_lock, flags);
801
802 /* If soft reset fails then most probably the bios on other
803 * function is also enabled.
804 * Since the initialization is sequential the other fn
805 * wont be able to acknowledge the soft reset.
806 * Issue a force soft reset to workaround this scenario.
807 */
808 if (max_wait_time == 0) {
809 /* Issue Force Soft Reset */
810 spin_lock_irqsave(&ha->hardware_lock, flags);
811 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
812 readl(&ha->reg->ctrl_status);
813 spin_unlock_irqrestore(&ha->hardware_lock, flags);
814 /* Wait until the firmware tells us the Soft Reset is done */
815 max_wait_time = SOFT_RESET_TOV;
816 do {
817 spin_lock_irqsave(&ha->hardware_lock, flags);
818 ctrl_status = readw(&ha->reg->ctrl_status);
819 spin_unlock_irqrestore(&ha->hardware_lock, flags);
820
821 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
822 status = QLA_SUCCESS;
823 break;
824 }
825
826 msleep(1000);
827 } while ((--max_wait_time));
828 }
829
830 return status;
831 }
832
833 /**
834 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
835 * @ha: Pointer to host adapter structure.
836 *
837 * This routine is called just prior to a HARD RESET to return all
838 * outstanding commands back to the Operating System.
839 * Caller should make sure that the following locks are released
840 * before this calling routine: Hardware lock, and io_request_lock.
841 **/
842 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
843 {
844 struct srb *srb;
845 int i;
846 unsigned long flags;
847
848 spin_lock_irqsave(&ha->hardware_lock, flags);
849 for (i = 0; i < ha->host->can_queue; i++) {
850 srb = qla4xxx_del_from_active_array(ha, i);
851 if (srb != NULL) {
852 srb->cmd->result = DID_RESET << 16;
853 qla4xxx_srb_compl(ha, srb);
854 }
855 }
856 spin_unlock_irqrestore(&ha->hardware_lock, flags);
857
858 }
859
860 /**
861 * qla4xxx_recover_adapter - recovers adapter after a fatal error
862 * @ha: Pointer to host adapter structure.
863 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
864 * after adapter recovery has completed.
865 * 0=preserve ddb list, 1=destroy and rebuild ddb list
866 **/
867 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
868 uint8_t renew_ddb_list)
869 {
870 int status;
871
872 /* Stall incoming I/O until we are done */
873 clear_bit(AF_ONLINE, &ha->flags);
874 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
875 __func__));
876
877 /* Wait for outstanding commands to complete.
878 * Stalls the driver for max 30 secs
879 */
880 status = qla4xxx_cmd_wait(ha);
881
882 qla4xxx_disable_intrs(ha);
883
884 /* Flush any pending ddb changed AENs */
885 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
886
887 /* Reset the firmware. If successful, function
888 * returns with ISP interrupts enabled.
889 */
890 if (status == QLA_SUCCESS) {
891 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
892 ha->host_no, __func__));
893 qla4xxx_flush_active_srbs(ha);
894 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
895 status = qla4xxx_soft_reset(ha);
896 else
897 status = QLA_ERROR;
898 }
899
900 /* Flush any pending ddb changed AENs */
901 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
902
903 /* Re-initialize firmware. If successful, function returns
904 * with ISP interrupts enabled */
905 if (status == QLA_SUCCESS) {
906 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
907 ha->host_no, __func__));
908
909 /* If successful, AF_ONLINE flag set in
910 * qla4xxx_initialize_adapter */
911 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
912 }
913
914 /* Failed adapter initialization?
915 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
916 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
917 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
918 /* Adapter initialization failed, see if we can retry
919 * resetting the ha */
920 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
921 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
922 DEBUG2(printk("scsi%ld: recover adapter - retrying "
923 "(%d) more times\n", ha->host_no,
924 ha->retry_reset_ha_cnt));
925 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
926 status = QLA_ERROR;
927 } else {
928 if (ha->retry_reset_ha_cnt > 0) {
929 /* Schedule another Reset HA--DPC will retry */
930 ha->retry_reset_ha_cnt--;
931 DEBUG2(printk("scsi%ld: recover adapter - "
932 "retry remaining %d\n",
933 ha->host_no,
934 ha->retry_reset_ha_cnt));
935 status = QLA_ERROR;
936 }
937
938 if (ha->retry_reset_ha_cnt == 0) {
939 /* Recover adapter retries have been exhausted.
940 * Adapter DEAD */
941 DEBUG2(printk("scsi%ld: recover adapter "
942 "failed - board disabled\n",
943 ha->host_no));
944 qla4xxx_flush_active_srbs(ha);
945 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
946 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
947 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
948 &ha->dpc_flags);
949 status = QLA_ERROR;
950 }
951 }
952 } else {
953 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
954 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
955 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
956 }
957
958 ha->adapter_error_count++;
959
960 if (status == QLA_SUCCESS)
961 qla4xxx_enable_intrs(ha);
962
963 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
964 return status;
965 }
966
967 /**
968 * qla4xxx_do_dpc - dpc routine
969 * @data: in our case pointer to adapter structure
970 *
971 * This routine is a task that is schedule by the interrupt handler
972 * to perform the background processing for interrupts. We put it
973 * on a task queue that is consumed whenever the scheduler runs; that's
974 * so you can do anything (i.e. put the process to sleep etc). In fact,
975 * the mid-level tries to sleep when it reaches the driver threshold
976 * "host->can_queue". This can cause a panic if we were in our interrupt code.
977 **/
978 static void qla4xxx_do_dpc(struct work_struct *work)
979 {
980 struct scsi_qla_host *ha =
981 container_of(work, struct scsi_qla_host, dpc_work);
982 struct ddb_entry *ddb_entry, *dtemp;
983 int status = QLA_ERROR;
984
985 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
986 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
987 ha->host_no, __func__, ha->flags, ha->dpc_flags,
988 readw(&ha->reg->ctrl_status)));
989
990 /* Initialization not yet finished. Don't do anything yet. */
991 if (!test_bit(AF_INIT_DONE, &ha->flags))
992 return;
993
994 if (adapter_up(ha) ||
995 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
996 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
997 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
998 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
999 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1000 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1001
1002 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1003 uint8_t wait_time = RESET_INTR_TOV;
1004
1005 while ((readw(&ha->reg->ctrl_status) &
1006 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1007 if (--wait_time == 0)
1008 break;
1009 msleep(1000);
1010 }
1011 if (wait_time == 0)
1012 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1013 "bit not cleared-- resetting\n",
1014 ha->host_no, __func__));
1015 qla4xxx_flush_active_srbs(ha);
1016 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1017 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1018 status = qla4xxx_initialize_adapter(ha,
1019 PRESERVE_DDB_LIST);
1020 }
1021 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1022 if (status == QLA_SUCCESS)
1023 qla4xxx_enable_intrs(ha);
1024 }
1025 }
1026
1027 /* ---- process AEN? --- */
1028 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1029 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1030
1031 /* ---- Get DHCP IP Address? --- */
1032 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1033 qla4xxx_get_dhcp_ip_address(ha);
1034
1035 /* ---- relogin device? --- */
1036 if (adapter_up(ha) &&
1037 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1038 list_for_each_entry_safe(ddb_entry, dtemp,
1039 &ha->ddb_list, list) {
1040 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1041 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1042 qla4xxx_relogin_device(ha, ddb_entry);
1043
1044 /*
1045 * If mbx cmd times out there is no point
1046 * in continuing further.
1047 * With large no of targets this can hang
1048 * the system.
1049 */
1050 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1051 printk(KERN_WARNING "scsi%ld: %s: "
1052 "need to reset hba\n",
1053 ha->host_no, __func__);
1054 break;
1055 }
1056 }
1057 }
1058 }
1059
1060 /**
1061 * qla4xxx_free_adapter - release the adapter
1062 * @ha: pointer to adapter structure
1063 **/
1064 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1065 {
1066
1067 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1068 /* Turn-off interrupts on the card. */
1069 qla4xxx_disable_intrs(ha);
1070 }
1071
1072 /* Kill the kernel thread for this host */
1073 if (ha->dpc_thread)
1074 destroy_workqueue(ha->dpc_thread);
1075
1076 /* Issue Soft Reset to put firmware in unknown state */
1077 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1078 qla4xxx_hw_reset(ha);
1079
1080 /* Remove timer thread, if present */
1081 if (ha->timer_active)
1082 qla4xxx_stop_timer(ha);
1083
1084 /* free extra memory */
1085 qla4xxx_mem_free(ha);
1086
1087 /* Detach interrupts */
1088 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1089 free_irq(ha->pdev->irq, ha);
1090
1091 pci_disable_device(ha->pdev);
1092
1093 }
1094
1095 /***
1096 * qla4xxx_iospace_config - maps registers
1097 * @ha: pointer to adapter structure
1098 *
1099 * This routines maps HBA's registers from the pci address space
1100 * into the kernel virtual address space for memory mapped i/o.
1101 **/
1102 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1103 {
1104 unsigned long pio, pio_len, pio_flags;
1105 unsigned long mmio, mmio_len, mmio_flags;
1106
1107 pio = pci_resource_start(ha->pdev, 0);
1108 pio_len = pci_resource_len(ha->pdev, 0);
1109 pio_flags = pci_resource_flags(ha->pdev, 0);
1110 if (pio_flags & IORESOURCE_IO) {
1111 if (pio_len < MIN_IOBASE_LEN) {
1112 dev_warn(&ha->pdev->dev,
1113 "Invalid PCI I/O region size\n");
1114 pio = 0;
1115 }
1116 } else {
1117 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1118 pio = 0;
1119 }
1120
1121 /* Use MMIO operations for all accesses. */
1122 mmio = pci_resource_start(ha->pdev, 1);
1123 mmio_len = pci_resource_len(ha->pdev, 1);
1124 mmio_flags = pci_resource_flags(ha->pdev, 1);
1125
1126 if (!(mmio_flags & IORESOURCE_MEM)) {
1127 dev_err(&ha->pdev->dev,
1128 "region #0 not an MMIO resource, aborting\n");
1129
1130 goto iospace_error_exit;
1131 }
1132 if (mmio_len < MIN_IOBASE_LEN) {
1133 dev_err(&ha->pdev->dev,
1134 "Invalid PCI mem region size, aborting\n");
1135 goto iospace_error_exit;
1136 }
1137
1138 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1139 dev_warn(&ha->pdev->dev,
1140 "Failed to reserve PIO/MMIO regions\n");
1141
1142 goto iospace_error_exit;
1143 }
1144
1145 ha->pio_address = pio;
1146 ha->pio_length = pio_len;
1147 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1148 if (!ha->reg) {
1149 dev_err(&ha->pdev->dev,
1150 "cannot remap MMIO, aborting\n");
1151
1152 goto iospace_error_exit;
1153 }
1154
1155 return 0;
1156
1157 iospace_error_exit:
1158 return -ENOMEM;
1159 }
1160
1161 /**
1162 * qla4xxx_probe_adapter - callback function to probe HBA
1163 * @pdev: pointer to pci_dev structure
1164 * @pci_device_id: pointer to pci_device entry
1165 *
1166 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1167 * It returns zero if successful. It also initializes all data necessary for
1168 * the driver.
1169 **/
1170 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1171 const struct pci_device_id *ent)
1172 {
1173 int ret = -ENODEV, status;
1174 struct Scsi_Host *host;
1175 struct scsi_qla_host *ha;
1176 struct ddb_entry *ddb_entry, *ddbtemp;
1177 uint8_t init_retry_count = 0;
1178 char buf[34];
1179
1180 if (pci_enable_device(pdev))
1181 return -1;
1182
1183 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1184 if (host == NULL) {
1185 printk(KERN_WARNING
1186 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1187 goto probe_disable_device;
1188 }
1189
1190 /* Clear our data area */
1191 ha = (struct scsi_qla_host *) host->hostdata;
1192 memset(ha, 0, sizeof(*ha));
1193
1194 /* Save the information from PCI BIOS. */
1195 ha->pdev = pdev;
1196 ha->host = host;
1197 ha->host_no = host->host_no;
1198
1199 /* Configure PCI I/O space. */
1200 ret = qla4xxx_iospace_config(ha);
1201 if (ret)
1202 goto probe_failed;
1203
1204 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1205 pdev->device, pdev->irq, ha->reg);
1206
1207 qla4xxx_config_dma_addressing(ha);
1208
1209 /* Initialize lists and spinlocks. */
1210 INIT_LIST_HEAD(&ha->ddb_list);
1211 INIT_LIST_HEAD(&ha->free_srb_q);
1212
1213 mutex_init(&ha->mbox_sem);
1214
1215 spin_lock_init(&ha->hardware_lock);
1216
1217 /* Allocate dma buffers */
1218 if (qla4xxx_mem_alloc(ha)) {
1219 dev_warn(&ha->pdev->dev,
1220 "[ERROR] Failed to allocate memory for adapter\n");
1221
1222 ret = -ENOMEM;
1223 goto probe_failed;
1224 }
1225
1226 /*
1227 * Initialize the Host adapter request/response queues and
1228 * firmware
1229 * NOTE: interrupts enabled upon successful completion
1230 */
1231 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1232 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1233 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1234 "(%d)\n", __func__, init_retry_count));
1235 qla4xxx_soft_reset(ha);
1236 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1237 }
1238 if (status == QLA_ERROR) {
1239 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1240
1241 ret = -ENODEV;
1242 goto probe_failed;
1243 }
1244
1245 host->cmd_per_lun = 3;
1246 host->max_channel = 0;
1247 host->max_lun = MAX_LUNS - 1;
1248 host->max_id = MAX_TARGETS;
1249 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1250 host->can_queue = MAX_SRBS ;
1251 host->transportt = qla4xxx_scsi_transport;
1252
1253 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1254 if (ret) {
1255 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1256 goto probe_failed;
1257 }
1258
1259 /* Startup the kernel thread for this host adapter. */
1260 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1261 "qla4xxx_dpc\n", __func__));
1262 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1263 ha->dpc_thread = create_singlethread_workqueue(buf);
1264 if (!ha->dpc_thread) {
1265 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1266 ret = -ENODEV;
1267 goto probe_failed;
1268 }
1269 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1270
1271 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1272 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1273 if (ret) {
1274 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1275 " already in use.\n", pdev->irq);
1276 goto probe_failed;
1277 }
1278 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1279 host->irq = pdev->irq;
1280 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1281
1282 qla4xxx_enable_intrs(ha);
1283
1284 /* Start timer thread. */
1285 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1286
1287 set_bit(AF_INIT_DONE, &ha->flags);
1288
1289 pci_set_drvdata(pdev, ha);
1290
1291 ret = scsi_add_host(host, &pdev->dev);
1292 if (ret)
1293 goto probe_failed;
1294
1295 /* Update transport device information for all devices. */
1296 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1297 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1298 if (qla4xxx_add_sess(ddb_entry))
1299 goto remove_host;
1300 }
1301
1302 printk(KERN_INFO
1303 " QLogic iSCSI HBA Driver version: %s\n"
1304 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1305 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1306 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1307 ha->patch_number, ha->build_number);
1308
1309 return 0;
1310
1311 remove_host:
1312 qla4xxx_free_ddb_list(ha);
1313 scsi_remove_host(host);
1314
1315 probe_failed:
1316 qla4xxx_free_adapter(ha);
1317 scsi_host_put(ha->host);
1318
1319 probe_disable_device:
1320 pci_disable_device(pdev);
1321
1322 return ret;
1323 }
1324
1325 /**
1326 * qla4xxx_remove_adapter - calback function to remove adapter.
1327 * @pci_dev: PCI device pointer
1328 **/
1329 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1330 {
1331 struct scsi_qla_host *ha;
1332
1333 ha = pci_get_drvdata(pdev);
1334
1335 /* remove devs from iscsi_sessions to scsi_devices */
1336 qla4xxx_free_ddb_list(ha);
1337
1338 scsi_remove_host(ha->host);
1339
1340 qla4xxx_free_adapter(ha);
1341
1342 scsi_host_put(ha->host);
1343
1344 pci_set_drvdata(pdev, NULL);
1345 }
1346
1347 /**
1348 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1349 * @ha: HA context
1350 *
1351 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1352 * supported addressing method.
1353 */
1354 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1355 {
1356 int retval;
1357
1358 /* Update our PCI device dma_mask for full 64 bit mask */
1359 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1360 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1361 dev_dbg(&ha->pdev->dev,
1362 "Failed to set 64 bit PCI consistent mask; "
1363 "using 32 bit.\n");
1364 retval = pci_set_consistent_dma_mask(ha->pdev,
1365 DMA_32BIT_MASK);
1366 }
1367 } else
1368 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1369 }
1370
1371 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1372 {
1373 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1374 struct ddb_entry *ddb = sess->dd_data;
1375
1376 sdev->hostdata = ddb;
1377 sdev->tagged_supported = 1;
1378 scsi_activate_tcq(sdev, sdev->host->can_queue);
1379 return 0;
1380 }
1381
1382 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1383 {
1384 sdev->tagged_supported = 1;
1385 return 0;
1386 }
1387
1388 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1389 {
1390 scsi_deactivate_tcq(sdev, 1);
1391 }
1392
1393 /**
1394 * qla4xxx_del_from_active_array - returns an active srb
1395 * @ha: Pointer to host adapter structure.
1396 * @index: index into to the active_array
1397 *
1398 * This routine removes and returns the srb at the specified index
1399 **/
1400 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1401 {
1402 struct srb *srb = NULL;
1403 struct scsi_cmnd *cmd;
1404
1405 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1406 return srb;
1407
1408 if (!(srb = (struct srb *)cmd->host_scribble))
1409 return srb;
1410
1411 /* update counters */
1412 if (srb->flags & SRB_DMA_VALID) {
1413 ha->req_q_count += srb->iocb_cnt;
1414 ha->iocb_cnt -= srb->iocb_cnt;
1415 if (srb->cmd)
1416 srb->cmd->host_scribble = NULL;
1417 }
1418 return srb;
1419 }
1420
1421 /**
1422 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1423 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1424 * @cmd: Scsi Command to wait on.
1425 *
1426 * This routine waits for the command to be returned by the Firmware
1427 * for some max time.
1428 **/
1429 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1430 struct scsi_cmnd *cmd)
1431 {
1432 int done = 0;
1433 struct srb *rp;
1434 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1435
1436 do {
1437 /* Checking to see if its returned to OS */
1438 rp = (struct srb *) cmd->SCp.ptr;
1439 if (rp == NULL) {
1440 done++;
1441 break;
1442 }
1443
1444 msleep(2000);
1445 } while (max_wait_time--);
1446
1447 return done;
1448 }
1449
1450 /**
1451 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1452 * @ha: Pointer to host adapter structure
1453 **/
1454 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1455 {
1456 unsigned long wait_online;
1457
1458 wait_online = jiffies + (30 * HZ);
1459 while (time_before(jiffies, wait_online)) {
1460
1461 if (adapter_up(ha))
1462 return QLA_SUCCESS;
1463 else if (ha->retry_reset_ha_cnt == 0)
1464 return QLA_ERROR;
1465
1466 msleep(2000);
1467 }
1468
1469 return QLA_ERROR;
1470 }
1471
1472 /**
1473 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1474 * @ha: pointer to to HBA
1475 * @t: target id
1476 * @l: lun id
1477 *
1478 * This function waits for all outstanding commands to a lun to complete. It
1479 * returns 0 if all pending commands are returned and 1 otherwise.
1480 **/
1481 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1482 int t, int l)
1483 {
1484 int cnt;
1485 int status = 0;
1486 struct scsi_cmnd *cmd;
1487
1488 /*
1489 * Waiting for all commands for the designated target in the active
1490 * array
1491 */
1492 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1493 cmd = scsi_host_find_tag(ha->host, cnt);
1494 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1495 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1496 status++;
1497 break;
1498 }
1499 }
1500 }
1501 return status;
1502 }
1503
1504 /**
1505 * qla4xxx_eh_device_reset - callback for target reset.
1506 * @cmd: Pointer to Linux's SCSI command structure
1507 *
1508 * This routine is called by the Linux OS to reset all luns on the
1509 * specified target.
1510 **/
1511 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1512 {
1513 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1514 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1515 struct srb *sp;
1516 int ret = FAILED, stat;
1517
1518 sp = (struct srb *) cmd->SCp.ptr;
1519 if (!sp || !ddb_entry)
1520 return ret;
1521
1522 dev_info(&ha->pdev->dev,
1523 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1524 cmd->device->channel, cmd->device->id, cmd->device->lun);
1525
1526 DEBUG2(printk(KERN_INFO
1527 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1528 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1529 cmd, jiffies, cmd->timeout_per_command / HZ,
1530 ha->dpc_flags, cmd->result, cmd->allowed));
1531
1532 /* FIXME: wait for hba to go online */
1533 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1534 if (stat != QLA_SUCCESS) {
1535 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1536 goto eh_dev_reset_done;
1537 }
1538
1539 /* Send marker. */
1540 ha->marker_needed = 1;
1541
1542 /*
1543 * If we are coming down the EH path, wait for all commands to complete
1544 * for the device.
1545 */
1546 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1547 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1548 cmd->device->id,
1549 cmd->device->lun)){
1550 dev_info(&ha->pdev->dev,
1551 "DEVICE RESET FAILED - waiting for "
1552 "commands.\n");
1553 goto eh_dev_reset_done;
1554 }
1555 }
1556
1557 dev_info(&ha->pdev->dev,
1558 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1559 ha->host_no, cmd->device->channel, cmd->device->id,
1560 cmd->device->lun);
1561
1562 ret = SUCCESS;
1563
1564 eh_dev_reset_done:
1565
1566 return ret;
1567 }
1568
1569 /**
1570 * qla4xxx_eh_host_reset - kernel callback
1571 * @cmd: Pointer to Linux's SCSI command structure
1572 *
1573 * This routine is invoked by the Linux kernel to perform fatal error
1574 * recovery on the specified adapter.
1575 **/
1576 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1577 {
1578 int return_status = FAILED;
1579 struct scsi_qla_host *ha;
1580
1581 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1582
1583 dev_info(&ha->pdev->dev,
1584 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1585 cmd->device->channel, cmd->device->id, cmd->device->lun);
1586
1587 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1588 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1589 "DEAD.\n", ha->host_no, cmd->device->channel,
1590 __func__));
1591
1592 return FAILED;
1593 }
1594
1595 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1596 return_status = SUCCESS;
1597 }
1598
1599 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1600 return_status == FAILED ? "FAILED" : "SUCCEDED");
1601
1602 return return_status;
1603 }
1604
1605
1606 static struct pci_device_id qla4xxx_pci_tbl[] = {
1607 {
1608 .vendor = PCI_VENDOR_ID_QLOGIC,
1609 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1610 .subvendor = PCI_ANY_ID,
1611 .subdevice = PCI_ANY_ID,
1612 },
1613 {
1614 .vendor = PCI_VENDOR_ID_QLOGIC,
1615 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1616 .subvendor = PCI_ANY_ID,
1617 .subdevice = PCI_ANY_ID,
1618 },
1619 {
1620 .vendor = PCI_VENDOR_ID_QLOGIC,
1621 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1622 .subvendor = PCI_ANY_ID,
1623 .subdevice = PCI_ANY_ID,
1624 },
1625 {0, 0},
1626 };
1627 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1628
1629 static struct pci_driver qla4xxx_pci_driver = {
1630 .name = DRIVER_NAME,
1631 .id_table = qla4xxx_pci_tbl,
1632 .probe = qla4xxx_probe_adapter,
1633 .remove = qla4xxx_remove_adapter,
1634 };
1635
1636 static int __init qla4xxx_module_init(void)
1637 {
1638 int ret;
1639
1640 /* Allocate cache for SRBs. */
1641 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1642 SLAB_HWCACHE_ALIGN, NULL, NULL);
1643 if (srb_cachep == NULL) {
1644 printk(KERN_ERR
1645 "%s: Unable to allocate SRB cache..."
1646 "Failing load!\n", DRIVER_NAME);
1647 ret = -ENOMEM;
1648 goto no_srp_cache;
1649 }
1650
1651 /* Derive version string. */
1652 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1653 if (ql4xextended_error_logging)
1654 strcat(qla4xxx_version_str, "-debug");
1655
1656 qla4xxx_scsi_transport =
1657 iscsi_register_transport(&qla4xxx_iscsi_transport);
1658 if (!qla4xxx_scsi_transport){
1659 ret = -ENODEV;
1660 goto release_srb_cache;
1661 }
1662
1663 ret = pci_register_driver(&qla4xxx_pci_driver);
1664 if (ret)
1665 goto unregister_transport;
1666
1667 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1668 return 0;
1669
1670 unregister_transport:
1671 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1672 release_srb_cache:
1673 kmem_cache_destroy(srb_cachep);
1674 no_srp_cache:
1675 return ret;
1676 }
1677
1678 static void __exit qla4xxx_module_exit(void)
1679 {
1680 ql4_mod_unload = 1;
1681 pci_unregister_driver(&qla4xxx_pci_driver);
1682 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1683 kmem_cache_destroy(srb_cachep);
1684 }
1685
1686 module_init(qla4xxx_module_init);
1687 module_exit(qla4xxx_module_exit);
1688
1689 MODULE_AUTHOR("QLogic Corporation");
1690 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1691 MODULE_LICENSE("GPL");
1692 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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