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x86: cpa self-test, WARN_ON()
[wrt350n-kernel.git] / drivers / scsi / qla4xxx / ql4_os.c
blobd3f86646cb088b0fecbbd9edcd0b26c8b51bebd1
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7 #include <linux/moduleparam.h>
8
9 #include <scsi/scsi_tcq.h>
10 #include <scsi/scsicam.h>
11
12 #include "ql4_def.h"
13 #include "ql4_version.h"
14 #include "ql4_glbl.h"
15 #include "ql4_dbg.h"
16 #include "ql4_inline.h"
17
18 /*
19 * Driver version
20 */
21 static char qla4xxx_version_str[40];
22
23 /*
24 * SRB allocation cache
25 */
26 static struct kmem_cache *srb_cachep;
27
28 /*
29 * Module parameter information and variables
30 */
31 int ql4xdiscoverywait = 60;
32 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
33 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
34 int ql4xdontresethba = 0;
35 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
36 MODULE_PARM_DESC(ql4xdontresethba,
37 "Dont reset the HBA when the driver gets 0x8002 AEN "
38 " default it will reset hba :0"
39 " set to 1 to avoid resetting HBA");
40
41 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
42 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
43 MODULE_PARM_DESC(ql4xextended_error_logging,
44 "Option to enable extended error logging, "
45 "Default is 0 - no logging, 1 - debug logging");
46
47 int ql4_mod_unload = 0;
48
49 /*
50 * SCSI host template entry points
51 */
52 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
53
54 /*
55 * iSCSI template entry points
56 */
57 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
58 enum iscsi_tgt_dscvr type, uint32_t enable,
59 struct sockaddr *dst_addr);
60 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
61 enum iscsi_param param, char *buf);
62 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
63 enum iscsi_param param, char *buf);
64 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
65 enum iscsi_host_param param, char *buf);
66 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
67 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
68 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
69
70 /*
71 * SCSI host template entry points
72 */
73 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
74 void (*done) (struct scsi_cmnd *));
75 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
76 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
77 static int qla4xxx_slave_alloc(struct scsi_device *device);
78 static int qla4xxx_slave_configure(struct scsi_device *device);
79 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
80
81 static struct scsi_host_template qla4xxx_driver_template = {
82 .module = THIS_MODULE,
83 .name = DRIVER_NAME,
84 .proc_name = DRIVER_NAME,
85 .queuecommand = qla4xxx_queuecommand,
86
87 .eh_device_reset_handler = qla4xxx_eh_device_reset,
88 .eh_host_reset_handler = qla4xxx_eh_host_reset,
89
90 .slave_configure = qla4xxx_slave_configure,
91 .slave_alloc = qla4xxx_slave_alloc,
92 .slave_destroy = qla4xxx_slave_destroy,
93
94 .this_id = -1,
95 .cmd_per_lun = 3,
96 .use_clustering = ENABLE_CLUSTERING,
97 .use_sg_chaining = ENABLE_SG_CHAINING,
98 .sg_tablesize = SG_ALL,
99
100 .max_sectors = 0xFFFF,
101 };
102
103 static struct iscsi_transport qla4xxx_iscsi_transport = {
104 .owner = THIS_MODULE,
105 .name = DRIVER_NAME,
106 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
107 CAP_DATA_PATH_OFFLOAD,
108 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
109 ISCSI_TARGET_NAME | ISCSI_TPGT,
110 .host_param_mask = ISCSI_HOST_HWADDRESS |
111 ISCSI_HOST_IPADDRESS |
112 ISCSI_HOST_INITIATOR_NAME,
113 .sessiondata_size = sizeof(struct ddb_entry),
114 .host_template = &qla4xxx_driver_template,
115
116 .tgt_dscvr = qla4xxx_tgt_dscvr,
117 .get_conn_param = qla4xxx_conn_get_param,
118 .get_session_param = qla4xxx_sess_get_param,
119 .get_host_param = qla4xxx_host_get_param,
120 .start_conn = qla4xxx_conn_start,
121 .stop_conn = qla4xxx_conn_stop,
122 .session_recovery_timedout = qla4xxx_recovery_timedout,
123 };
124
125 static struct scsi_transport_template *qla4xxx_scsi_transport;
126
127 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
128 {
129 struct ddb_entry *ddb_entry = session->dd_data;
130 struct scsi_qla_host *ha = ddb_entry->ha;
131
132 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
133 "secs exhausted, marking device DEAD.\n", ha->host_no,
134 __func__, ddb_entry->fw_ddb_index,
135 ha->port_down_retry_count));
136
137 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
138
139 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
140 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
141 queue_work(ha->dpc_thread, &ha->dpc_work);
142 }
143
144 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
145 {
146 struct iscsi_cls_session *session;
147 struct ddb_entry *ddb_entry;
148
149 session = iscsi_dev_to_session(conn->dev.parent);
150 ddb_entry = session->dd_data;
151
152 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
153 ddb_entry->ha->host_no, __func__,
154 ddb_entry->fw_ddb_index));
155 iscsi_unblock_session(session);
156 return 0;
157 }
158
159 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
160 {
161 struct iscsi_cls_session *session;
162 struct ddb_entry *ddb_entry;
163
164 session = iscsi_dev_to_session(conn->dev.parent);
165 ddb_entry = session->dd_data;
166
167 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
168 ddb_entry->ha->host_no, __func__,
169 ddb_entry->fw_ddb_index));
170 if (flag == STOP_CONN_RECOVER)
171 iscsi_block_session(session);
172 else
173 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
174 }
175
176 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
177 enum iscsi_host_param param, char *buf)
178 {
179 struct scsi_qla_host *ha = to_qla_host(shost);
180 int len;
181
182 switch (param) {
183 case ISCSI_HOST_PARAM_HWADDRESS:
184 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
185 break;
186 case ISCSI_HOST_PARAM_IPADDRESS:
187 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
188 ha->ip_address[1], ha->ip_address[2],
189 ha->ip_address[3]);
190 break;
191 case ISCSI_HOST_PARAM_INITIATOR_NAME:
192 len = sprintf(buf, "%s\n", ha->name_string);
193 break;
194 default:
195 return -ENOSYS;
196 }
197
198 return len;
199 }
200
201 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
202 enum iscsi_param param, char *buf)
203 {
204 struct ddb_entry *ddb_entry = sess->dd_data;
205 int len;
206
207 switch (param) {
208 case ISCSI_PARAM_TARGET_NAME:
209 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
210 ddb_entry->iscsi_name);
211 break;
212 case ISCSI_PARAM_TPGT:
213 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
214 break;
215 default:
216 return -ENOSYS;
217 }
218
219 return len;
220 }
221
222 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
223 enum iscsi_param param, char *buf)
224 {
225 struct iscsi_cls_session *session;
226 struct ddb_entry *ddb_entry;
227 int len;
228
229 session = iscsi_dev_to_session(conn->dev.parent);
230 ddb_entry = session->dd_data;
231
232 switch (param) {
233 case ISCSI_PARAM_CONN_PORT:
234 len = sprintf(buf, "%hu\n", ddb_entry->port);
235 break;
236 case ISCSI_PARAM_CONN_ADDRESS:
237 /* TODO: what are the ipv6 bits */
238 len = sprintf(buf, "%u.%u.%u.%u\n",
239 NIPQUAD(ddb_entry->ip_addr));
240 break;
241 default:
242 return -ENOSYS;
243 }
244
245 return len;
246 }
247
248 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
249 enum iscsi_tgt_dscvr type, uint32_t enable,
250 struct sockaddr *dst_addr)
251 {
252 struct scsi_qla_host *ha;
253 struct sockaddr_in *addr;
254 struct sockaddr_in6 *addr6;
255 int ret = 0;
256
257 ha = (struct scsi_qla_host *) shost->hostdata;
258
259 switch (type) {
260 case ISCSI_TGT_DSCVR_SEND_TARGETS:
261 if (dst_addr->sa_family == AF_INET) {
262 addr = (struct sockaddr_in *)dst_addr;
263 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
264 addr->sin_port) != QLA_SUCCESS)
265 ret = -EIO;
266 } else if (dst_addr->sa_family == AF_INET6) {
267 /*
268 * TODO: fix qla4xxx_send_tgts
269 */
270 addr6 = (struct sockaddr_in6 *)dst_addr;
271 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
272 addr6->sin6_port) != QLA_SUCCESS)
273 ret = -EIO;
274 } else
275 ret = -ENOSYS;
276 break;
277 default:
278 ret = -ENOSYS;
279 }
280 return ret;
281 }
282
283 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
284 {
285 if (!ddb_entry->sess)
286 return;
287
288 if (ddb_entry->conn) {
289 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
290 iscsi_remove_session(ddb_entry->sess);
291 }
292 iscsi_free_session(ddb_entry->sess);
293 }
294
295 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
296 {
297 int err;
298
299 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
300 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
301 if (err) {
302 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
303 return err;
304 }
305
306 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
307 if (!ddb_entry->conn) {
308 iscsi_remove_session(ddb_entry->sess);
309 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
310 return -ENOMEM;
311 }
312 return 0;
313 }
314
315 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
316 {
317 struct ddb_entry *ddb_entry;
318 struct iscsi_cls_session *sess;
319
320 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
321 if (!sess)
322 return NULL;
323
324 ddb_entry = sess->dd_data;
325 memset(ddb_entry, 0, sizeof(*ddb_entry));
326 ddb_entry->ha = ha;
327 ddb_entry->sess = sess;
328 return ddb_entry;
329 }
330
331 /*
332 * Timer routines
333 */
334
335 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
336 unsigned long interval)
337 {
338 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
339 __func__, ha->host->host_no));
340 init_timer(&ha->timer);
341 ha->timer.expires = jiffies + interval * HZ;
342 ha->timer.data = (unsigned long)ha;
343 ha->timer.function = (void (*)(unsigned long))func;
344 add_timer(&ha->timer);
345 ha->timer_active = 1;
346 }
347
348 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
349 {
350 del_timer_sync(&ha->timer);
351 ha->timer_active = 0;
352 }
353
354 /***
355 * qla4xxx_mark_device_missing - mark a device as missing.
356 * @ha: Pointer to host adapter structure.
357 * @ddb_entry: Pointer to device database entry
358 *
359 * This routine marks a device missing and resets the relogin retry count.
360 **/
361 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
362 struct ddb_entry *ddb_entry)
363 {
364 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
365 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
366 ha->host_no, ddb_entry->bus, ddb_entry->target,
367 ddb_entry->fw_ddb_index));
368 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
369 }
370
371 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
372 struct ddb_entry *ddb_entry,
373 struct scsi_cmnd *cmd,
374 void (*done)(struct scsi_cmnd *))
375 {
376 struct srb *srb;
377
378 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
379 if (!srb)
380 return srb;
381
382 atomic_set(&srb->ref_count, 1);
383 srb->ha = ha;
384 srb->ddb = ddb_entry;
385 srb->cmd = cmd;
386 srb->flags = 0;
387 cmd->SCp.ptr = (void *)srb;
388 cmd->scsi_done = done;
389
390 return srb;
391 }
392
393 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
394 {
395 struct scsi_cmnd *cmd = srb->cmd;
396
397 if (srb->flags & SRB_DMA_VALID) {
398 scsi_dma_unmap(cmd);
399 srb->flags &= ~SRB_DMA_VALID;
400 }
401 cmd->SCp.ptr = NULL;
402 }
403
404 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
405 {
406 struct scsi_cmnd *cmd = srb->cmd;
407
408 qla4xxx_srb_free_dma(ha, srb);
409
410 mempool_free(srb, ha->srb_mempool);
411
412 cmd->scsi_done(cmd);
413 }
414
415 /**
416 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
417 * @cmd: Pointer to Linux's SCSI command structure
418 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
419 * that the command has been processed.
420 *
421 * Remarks:
422 * This routine is invoked by Linux to send a SCSI command to the driver.
423 * The mid-level driver tries to ensure that queuecommand never gets
424 * invoked concurrently with itself or the interrupt handler (although
425 * the interrupt handler may call this routine as part of request-
426 * completion handling). Unfortunely, it sometimes calls the scheduler
427 * in interrupt context which is a big NO! NO!.
428 **/
429 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
430 void (*done)(struct scsi_cmnd *))
431 {
432 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
433 struct ddb_entry *ddb_entry = cmd->device->hostdata;
434 struct srb *srb;
435 int rval;
436
437 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
438 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
439 cmd->result = DID_NO_CONNECT << 16;
440 goto qc_fail_command;
441 }
442 goto qc_host_busy;
443 }
444
445 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
446 goto qc_host_busy;
447
448 spin_unlock_irq(ha->host->host_lock);
449
450 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
451 if (!srb)
452 goto qc_host_busy_lock;
453
454 rval = qla4xxx_send_command_to_isp(ha, srb);
455 if (rval != QLA_SUCCESS)
456 goto qc_host_busy_free_sp;
457
458 spin_lock_irq(ha->host->host_lock);
459 return 0;
460
461 qc_host_busy_free_sp:
462 qla4xxx_srb_free_dma(ha, srb);
463 mempool_free(srb, ha->srb_mempool);
464
465 qc_host_busy_lock:
466 spin_lock_irq(ha->host->host_lock);
467
468 qc_host_busy:
469 return SCSI_MLQUEUE_HOST_BUSY;
470
471 qc_fail_command:
472 done(cmd);
473
474 return 0;
475 }
476
477 /**
478 * qla4xxx_mem_free - frees memory allocated to adapter
479 * @ha: Pointer to host adapter structure.
480 *
481 * Frees memory previously allocated by qla4xxx_mem_alloc
482 **/
483 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
484 {
485 if (ha->queues)
486 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
487 ha->queues_dma);
488
489 ha->queues_len = 0;
490 ha->queues = NULL;
491 ha->queues_dma = 0;
492 ha->request_ring = NULL;
493 ha->request_dma = 0;
494 ha->response_ring = NULL;
495 ha->response_dma = 0;
496 ha->shadow_regs = NULL;
497 ha->shadow_regs_dma = 0;
498
499 /* Free srb pool. */
500 if (ha->srb_mempool)
501 mempool_destroy(ha->srb_mempool);
502
503 ha->srb_mempool = NULL;
504
505 /* release io space registers */
506 if (ha->reg)
507 iounmap(ha->reg);
508 pci_release_regions(ha->pdev);
509 }
510
511 /**
512 * qla4xxx_mem_alloc - allocates memory for use by adapter.
513 * @ha: Pointer to host adapter structure
514 *
515 * Allocates DMA memory for request and response queues. Also allocates memory
516 * for srbs.
517 **/
518 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
519 {
520 unsigned long align;
521
522 /* Allocate contiguous block of DMA memory for queues. */
523 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
524 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
525 sizeof(struct shadow_regs) +
526 MEM_ALIGN_VALUE +
527 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
528 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
529 &ha->queues_dma, GFP_KERNEL);
530 if (ha->queues == NULL) {
531 dev_warn(&ha->pdev->dev,
532 "Memory Allocation failed - queues.\n");
533
534 goto mem_alloc_error_exit;
535 }
536 memset(ha->queues, 0, ha->queues_len);
537
538 /*
539 * As per RISC alignment requirements -- the bus-address must be a
540 * multiple of the request-ring size (in bytes).
541 */
542 align = 0;
543 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
544 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
545 (MEM_ALIGN_VALUE - 1));
546
547 /* Update request and response queue pointers. */
548 ha->request_dma = ha->queues_dma + align;
549 ha->request_ring = (struct queue_entry *) (ha->queues + align);
550 ha->response_dma = ha->queues_dma + align +
551 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
552 ha->response_ring = (struct queue_entry *) (ha->queues + align +
553 (REQUEST_QUEUE_DEPTH *
554 QUEUE_SIZE));
555 ha->shadow_regs_dma = ha->queues_dma + align +
556 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
557 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
558 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
559 (REQUEST_QUEUE_DEPTH *
560 QUEUE_SIZE) +
561 (RESPONSE_QUEUE_DEPTH *
562 QUEUE_SIZE));
563
564 /* Allocate memory for srb pool. */
565 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
566 mempool_free_slab, srb_cachep);
567 if (ha->srb_mempool == NULL) {
568 dev_warn(&ha->pdev->dev,
569 "Memory Allocation failed - SRB Pool.\n");
570
571 goto mem_alloc_error_exit;
572 }
573
574 return QLA_SUCCESS;
575
576 mem_alloc_error_exit:
577 qla4xxx_mem_free(ha);
578 return QLA_ERROR;
579 }
580
581 /**
582 * qla4xxx_timer - checks every second for work to do.
583 * @ha: Pointer to host adapter structure.
584 **/
585 static void qla4xxx_timer(struct scsi_qla_host *ha)
586 {
587 struct ddb_entry *ddb_entry, *dtemp;
588 int start_dpc = 0;
589
590 /* Search for relogin's to time-out and port down retry. */
591 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
592 /* Count down time between sending relogins */
593 if (adapter_up(ha) &&
594 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
595 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
596 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
597 INVALID_ENTRY) {
598 if (atomic_read(&ddb_entry->retry_relogin_timer)
599 == 0) {
600 atomic_set(&ddb_entry->
601 retry_relogin_timer,
602 INVALID_ENTRY);
603 set_bit(DPC_RELOGIN_DEVICE,
604 &ha->dpc_flags);
605 set_bit(DF_RELOGIN, &ddb_entry->flags);
606 DEBUG2(printk("scsi%ld: %s: index [%d]"
607 " login device\n",
608 ha->host_no, __func__,
609 ddb_entry->fw_ddb_index));
610 } else
611 atomic_dec(&ddb_entry->
612 retry_relogin_timer);
613 }
614 }
615
616 /* Wait for relogin to timeout */
617 if (atomic_read(&ddb_entry->relogin_timer) &&
618 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
619 /*
620 * If the relogin times out and the device is
621 * still NOT ONLINE then try and relogin again.
622 */
623 if (atomic_read(&ddb_entry->state) !=
624 DDB_STATE_ONLINE &&
625 ddb_entry->fw_ddb_device_state ==
626 DDB_DS_SESSION_FAILED) {
627 /* Reset retry relogin timer */
628 atomic_inc(&ddb_entry->relogin_retry_count);
629 DEBUG2(printk("scsi%ld: index[%d] relogin"
630 " timed out-retrying"
631 " relogin (%d)\n",
632 ha->host_no,
633 ddb_entry->fw_ddb_index,
634 atomic_read(&ddb_entry->
635 relogin_retry_count))
636 );
637 start_dpc++;
638 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
639 "initate relogin after"
640 " %d seconds\n",
641 ha->host_no, ddb_entry->bus,
642 ddb_entry->target,
643 ddb_entry->fw_ddb_index,
644 ddb_entry->default_time2wait + 4)
645 );
646
647 atomic_set(&ddb_entry->retry_relogin_timer,
648 ddb_entry->default_time2wait + 4);
649 }
650 }
651 }
652
653 /* Check for heartbeat interval. */
654 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
655 ha->heartbeat_interval != 0) {
656 ha->seconds_since_last_heartbeat++;
657 if (ha->seconds_since_last_heartbeat >
658 ha->heartbeat_interval + 2)
659 set_bit(DPC_RESET_HA, &ha->dpc_flags);
660 }
661
662
663 /* Wakeup the dpc routine for this adapter, if needed. */
664 if ((start_dpc ||
665 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
666 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
667 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
668 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
669 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
670 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
671 test_bit(DPC_AEN, &ha->dpc_flags)) &&
672 ha->dpc_thread) {
673 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
674 " - dpc flags = 0x%lx\n",
675 ha->host_no, __func__, ha->dpc_flags));
676 queue_work(ha->dpc_thread, &ha->dpc_work);
677 }
678
679 /* Reschedule timer thread to call us back in one second */
680 mod_timer(&ha->timer, jiffies + HZ);
681
682 DEBUG2(ha->seconds_since_last_intr++);
683 }
684
685 /**
686 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
687 * @ha: Pointer to host adapter structure.
688 *
689 * This routine stalls the driver until all outstanding commands are returned.
690 * Caller must release the Hardware Lock prior to calling this routine.
691 **/
692 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
693 {
694 uint32_t index = 0;
695 int stat = QLA_SUCCESS;
696 unsigned long flags;
697 struct scsi_cmnd *cmd;
698 int wait_cnt = WAIT_CMD_TOV; /*
699 * Initialized for 30 seconds as we
700 * expect all commands to retuned
701 * ASAP.
702 */
703
704 while (wait_cnt) {
705 spin_lock_irqsave(&ha->hardware_lock, flags);
706 /* Find a command that hasn't completed. */
707 for (index = 0; index < ha->host->can_queue; index++) {
708 cmd = scsi_host_find_tag(ha->host, index);
709 if (cmd != NULL)
710 break;
711 }
712 spin_unlock_irqrestore(&ha->hardware_lock, flags);
713
714 /* If No Commands are pending, wait is complete */
715 if (index == ha->host->can_queue) {
716 break;
717 }
718
719 /* If we timed out on waiting for commands to come back
720 * return ERROR.
721 */
722 wait_cnt--;
723 if (wait_cnt == 0)
724 stat = QLA_ERROR;
725 else {
726 msleep(1000);
727 }
728 } /* End of While (wait_cnt) */
729
730 return stat;
731 }
732
733 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
734 {
735 uint32_t ctrl_status;
736 unsigned long flags = 0;
737
738 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
739
740 spin_lock_irqsave(&ha->hardware_lock, flags);
741
742 /*
743 * If the SCSI Reset Interrupt bit is set, clear it.
744 * Otherwise, the Soft Reset won't work.
745 */
746 ctrl_status = readw(&ha->reg->ctrl_status);
747 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
748 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
749
750 /* Issue Soft Reset */
751 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
752 readl(&ha->reg->ctrl_status);
753
754 spin_unlock_irqrestore(&ha->hardware_lock, flags);
755 }
756
757 /**
758 * qla4xxx_soft_reset - performs soft reset.
759 * @ha: Pointer to host adapter structure.
760 **/
761 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
762 {
763 uint32_t max_wait_time;
764 unsigned long flags = 0;
765 int status = QLA_ERROR;
766 uint32_t ctrl_status;
767
768 qla4xxx_hw_reset(ha);
769
770 /* Wait until the Network Reset Intr bit is cleared */
771 max_wait_time = RESET_INTR_TOV;
772 do {
773 spin_lock_irqsave(&ha->hardware_lock, flags);
774 ctrl_status = readw(&ha->reg->ctrl_status);
775 spin_unlock_irqrestore(&ha->hardware_lock, flags);
776
777 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
778 break;
779
780 msleep(1000);
781 } while ((--max_wait_time));
782
783 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
784 DEBUG2(printk(KERN_WARNING
785 "scsi%ld: Network Reset Intr not cleared by "
786 "Network function, clearing it now!\n",
787 ha->host_no));
788 spin_lock_irqsave(&ha->hardware_lock, flags);
789 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
790 readl(&ha->reg->ctrl_status);
791 spin_unlock_irqrestore(&ha->hardware_lock, flags);
792 }
793
794 /* Wait until the firmware tells us the Soft Reset is done */
795 max_wait_time = SOFT_RESET_TOV;
796 do {
797 spin_lock_irqsave(&ha->hardware_lock, flags);
798 ctrl_status = readw(&ha->reg->ctrl_status);
799 spin_unlock_irqrestore(&ha->hardware_lock, flags);
800
801 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
802 status = QLA_SUCCESS;
803 break;
804 }
805
806 msleep(1000);
807 } while ((--max_wait_time));
808
809 /*
810 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
811 * after the soft reset has taken place.
812 */
813 spin_lock_irqsave(&ha->hardware_lock, flags);
814 ctrl_status = readw(&ha->reg->ctrl_status);
815 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
816 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
817 readl(&ha->reg->ctrl_status);
818 }
819 spin_unlock_irqrestore(&ha->hardware_lock, flags);
820
821 /* If soft reset fails then most probably the bios on other
822 * function is also enabled.
823 * Since the initialization is sequential the other fn
824 * wont be able to acknowledge the soft reset.
825 * Issue a force soft reset to workaround this scenario.
826 */
827 if (max_wait_time == 0) {
828 /* Issue Force Soft Reset */
829 spin_lock_irqsave(&ha->hardware_lock, flags);
830 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
831 readl(&ha->reg->ctrl_status);
832 spin_unlock_irqrestore(&ha->hardware_lock, flags);
833 /* Wait until the firmware tells us the Soft Reset is done */
834 max_wait_time = SOFT_RESET_TOV;
835 do {
836 spin_lock_irqsave(&ha->hardware_lock, flags);
837 ctrl_status = readw(&ha->reg->ctrl_status);
838 spin_unlock_irqrestore(&ha->hardware_lock, flags);
839
840 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
841 status = QLA_SUCCESS;
842 break;
843 }
844
845 msleep(1000);
846 } while ((--max_wait_time));
847 }
848
849 return status;
850 }
851
852 /**
853 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
854 * @ha: Pointer to host adapter structure.
855 *
856 * This routine is called just prior to a HARD RESET to return all
857 * outstanding commands back to the Operating System.
858 * Caller should make sure that the following locks are released
859 * before this calling routine: Hardware lock, and io_request_lock.
860 **/
861 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
862 {
863 struct srb *srb;
864 int i;
865 unsigned long flags;
866
867 spin_lock_irqsave(&ha->hardware_lock, flags);
868 for (i = 0; i < ha->host->can_queue; i++) {
869 srb = qla4xxx_del_from_active_array(ha, i);
870 if (srb != NULL) {
871 srb->cmd->result = DID_RESET << 16;
872 qla4xxx_srb_compl(ha, srb);
873 }
874 }
875 spin_unlock_irqrestore(&ha->hardware_lock, flags);
876
877 }
878
879 /**
880 * qla4xxx_recover_adapter - recovers adapter after a fatal error
881 * @ha: Pointer to host adapter structure.
882 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
883 * after adapter recovery has completed.
884 * 0=preserve ddb list, 1=destroy and rebuild ddb list
885 **/
886 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
887 uint8_t renew_ddb_list)
888 {
889 int status;
890
891 /* Stall incoming I/O until we are done */
892 clear_bit(AF_ONLINE, &ha->flags);
893 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
894 __func__));
895
896 /* Wait for outstanding commands to complete.
897 * Stalls the driver for max 30 secs
898 */
899 status = qla4xxx_cmd_wait(ha);
900
901 qla4xxx_disable_intrs(ha);
902
903 /* Flush any pending ddb changed AENs */
904 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
905
906 /* Reset the firmware. If successful, function
907 * returns with ISP interrupts enabled.
908 */
909 if (status == QLA_SUCCESS) {
910 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
911 ha->host_no, __func__));
912 qla4xxx_flush_active_srbs(ha);
913 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
914 status = qla4xxx_soft_reset(ha);
915 else
916 status = QLA_ERROR;
917 }
918
919 /* Flush any pending ddb changed AENs */
920 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
921
922 /* Re-initialize firmware. If successful, function returns
923 * with ISP interrupts enabled */
924 if (status == QLA_SUCCESS) {
925 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
926 ha->host_no, __func__));
927
928 /* If successful, AF_ONLINE flag set in
929 * qla4xxx_initialize_adapter */
930 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
931 }
932
933 /* Failed adapter initialization?
934 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
935 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
936 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
937 /* Adapter initialization failed, see if we can retry
938 * resetting the ha */
939 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
940 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
941 DEBUG2(printk("scsi%ld: recover adapter - retrying "
942 "(%d) more times\n", ha->host_no,
943 ha->retry_reset_ha_cnt));
944 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
945 status = QLA_ERROR;
946 } else {
947 if (ha->retry_reset_ha_cnt > 0) {
948 /* Schedule another Reset HA--DPC will retry */
949 ha->retry_reset_ha_cnt--;
950 DEBUG2(printk("scsi%ld: recover adapter - "
951 "retry remaining %d\n",
952 ha->host_no,
953 ha->retry_reset_ha_cnt));
954 status = QLA_ERROR;
955 }
956
957 if (ha->retry_reset_ha_cnt == 0) {
958 /* Recover adapter retries have been exhausted.
959 * Adapter DEAD */
960 DEBUG2(printk("scsi%ld: recover adapter "
961 "failed - board disabled\n",
962 ha->host_no));
963 qla4xxx_flush_active_srbs(ha);
964 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
965 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
966 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
967 &ha->dpc_flags);
968 status = QLA_ERROR;
969 }
970 }
971 } else {
972 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
973 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
974 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
975 }
976
977 ha->adapter_error_count++;
978
979 if (status == QLA_SUCCESS)
980 qla4xxx_enable_intrs(ha);
981
982 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
983 return status;
984 }
985
986 /**
987 * qla4xxx_do_dpc - dpc routine
988 * @data: in our case pointer to adapter structure
989 *
990 * This routine is a task that is schedule by the interrupt handler
991 * to perform the background processing for interrupts. We put it
992 * on a task queue that is consumed whenever the scheduler runs; that's
993 * so you can do anything (i.e. put the process to sleep etc). In fact,
994 * the mid-level tries to sleep when it reaches the driver threshold
995 * "host->can_queue". This can cause a panic if we were in our interrupt code.
996 **/
997 static void qla4xxx_do_dpc(struct work_struct *work)
998 {
999 struct scsi_qla_host *ha =
1000 container_of(work, struct scsi_qla_host, dpc_work);
1001 struct ddb_entry *ddb_entry, *dtemp;
1002 int status = QLA_ERROR;
1003
1004 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1005 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1006 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1007 readw(&ha->reg->ctrl_status)));
1008
1009 /* Initialization not yet finished. Don't do anything yet. */
1010 if (!test_bit(AF_INIT_DONE, &ha->flags))
1011 return;
1012
1013 if (adapter_up(ha) ||
1014 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1015 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1016 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1017 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1018 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1019 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1020
1021 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1022 uint8_t wait_time = RESET_INTR_TOV;
1023
1024 while ((readw(&ha->reg->ctrl_status) &
1025 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1026 if (--wait_time == 0)
1027 break;
1028 msleep(1000);
1029 }
1030 if (wait_time == 0)
1031 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1032 "bit not cleared-- resetting\n",
1033 ha->host_no, __func__));
1034 qla4xxx_flush_active_srbs(ha);
1035 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1036 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1037 status = qla4xxx_initialize_adapter(ha,
1038 PRESERVE_DDB_LIST);
1039 }
1040 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1041 if (status == QLA_SUCCESS)
1042 qla4xxx_enable_intrs(ha);
1043 }
1044 }
1045
1046 /* ---- process AEN? --- */
1047 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1048 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1049
1050 /* ---- Get DHCP IP Address? --- */
1051 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1052 qla4xxx_get_dhcp_ip_address(ha);
1053
1054 /* ---- relogin device? --- */
1055 if (adapter_up(ha) &&
1056 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1057 list_for_each_entry_safe(ddb_entry, dtemp,
1058 &ha->ddb_list, list) {
1059 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1060 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1061 qla4xxx_relogin_device(ha, ddb_entry);
1062
1063 /*
1064 * If mbx cmd times out there is no point
1065 * in continuing further.
1066 * With large no of targets this can hang
1067 * the system.
1068 */
1069 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1070 printk(KERN_WARNING "scsi%ld: %s: "
1071 "need to reset hba\n",
1072 ha->host_no, __func__);
1073 break;
1074 }
1075 }
1076 }
1077 }
1078
1079 /**
1080 * qla4xxx_free_adapter - release the adapter
1081 * @ha: pointer to adapter structure
1082 **/
1083 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1084 {
1085
1086 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1087 /* Turn-off interrupts on the card. */
1088 qla4xxx_disable_intrs(ha);
1089 }
1090
1091 /* Kill the kernel thread for this host */
1092 if (ha->dpc_thread)
1093 destroy_workqueue(ha->dpc_thread);
1094
1095 /* Issue Soft Reset to put firmware in unknown state */
1096 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1097 qla4xxx_hw_reset(ha);
1098
1099 /* Remove timer thread, if present */
1100 if (ha->timer_active)
1101 qla4xxx_stop_timer(ha);
1102
1103 /* Detach interrupts */
1104 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1105 free_irq(ha->pdev->irq, ha);
1106
1107 /* free extra memory */
1108 qla4xxx_mem_free(ha);
1109
1110 pci_disable_device(ha->pdev);
1111
1112 }
1113
1114 /***
1115 * qla4xxx_iospace_config - maps registers
1116 * @ha: pointer to adapter structure
1117 *
1118 * This routines maps HBA's registers from the pci address space
1119 * into the kernel virtual address space for memory mapped i/o.
1120 **/
1121 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1122 {
1123 unsigned long pio, pio_len, pio_flags;
1124 unsigned long mmio, mmio_len, mmio_flags;
1125
1126 pio = pci_resource_start(ha->pdev, 0);
1127 pio_len = pci_resource_len(ha->pdev, 0);
1128 pio_flags = pci_resource_flags(ha->pdev, 0);
1129 if (pio_flags & IORESOURCE_IO) {
1130 if (pio_len < MIN_IOBASE_LEN) {
1131 dev_warn(&ha->pdev->dev,
1132 "Invalid PCI I/O region size\n");
1133 pio = 0;
1134 }
1135 } else {
1136 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1137 pio = 0;
1138 }
1139
1140 /* Use MMIO operations for all accesses. */
1141 mmio = pci_resource_start(ha->pdev, 1);
1142 mmio_len = pci_resource_len(ha->pdev, 1);
1143 mmio_flags = pci_resource_flags(ha->pdev, 1);
1144
1145 if (!(mmio_flags & IORESOURCE_MEM)) {
1146 dev_err(&ha->pdev->dev,
1147 "region #0 not an MMIO resource, aborting\n");
1148
1149 goto iospace_error_exit;
1150 }
1151 if (mmio_len < MIN_IOBASE_LEN) {
1152 dev_err(&ha->pdev->dev,
1153 "Invalid PCI mem region size, aborting\n");
1154 goto iospace_error_exit;
1155 }
1156
1157 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1158 dev_warn(&ha->pdev->dev,
1159 "Failed to reserve PIO/MMIO regions\n");
1160
1161 goto iospace_error_exit;
1162 }
1163
1164 ha->pio_address = pio;
1165 ha->pio_length = pio_len;
1166 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1167 if (!ha->reg) {
1168 dev_err(&ha->pdev->dev,
1169 "cannot remap MMIO, aborting\n");
1170
1171 goto iospace_error_exit;
1172 }
1173
1174 return 0;
1175
1176 iospace_error_exit:
1177 return -ENOMEM;
1178 }
1179
1180 /**
1181 * qla4xxx_probe_adapter - callback function to probe HBA
1182 * @pdev: pointer to pci_dev structure
1183 * @pci_device_id: pointer to pci_device entry
1184 *
1185 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1186 * It returns zero if successful. It also initializes all data necessary for
1187 * the driver.
1188 **/
1189 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1190 const struct pci_device_id *ent)
1191 {
1192 int ret = -ENODEV, status;
1193 struct Scsi_Host *host;
1194 struct scsi_qla_host *ha;
1195 struct ddb_entry *ddb_entry, *ddbtemp;
1196 uint8_t init_retry_count = 0;
1197 char buf[34];
1198
1199 if (pci_enable_device(pdev))
1200 return -1;
1201
1202 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1203 if (host == NULL) {
1204 printk(KERN_WARNING
1205 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1206 goto probe_disable_device;
1207 }
1208
1209 /* Clear our data area */
1210 ha = (struct scsi_qla_host *) host->hostdata;
1211 memset(ha, 0, sizeof(*ha));
1212
1213 /* Save the information from PCI BIOS. */
1214 ha->pdev = pdev;
1215 ha->host = host;
1216 ha->host_no = host->host_no;
1217
1218 /* Configure PCI I/O space. */
1219 ret = qla4xxx_iospace_config(ha);
1220 if (ret)
1221 goto probe_failed;
1222
1223 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1224 pdev->device, pdev->irq, ha->reg);
1225
1226 qla4xxx_config_dma_addressing(ha);
1227
1228 /* Initialize lists and spinlocks. */
1229 INIT_LIST_HEAD(&ha->ddb_list);
1230 INIT_LIST_HEAD(&ha->free_srb_q);
1231
1232 mutex_init(&ha->mbox_sem);
1233
1234 spin_lock_init(&ha->hardware_lock);
1235
1236 /* Allocate dma buffers */
1237 if (qla4xxx_mem_alloc(ha)) {
1238 dev_warn(&ha->pdev->dev,
1239 "[ERROR] Failed to allocate memory for adapter\n");
1240
1241 ret = -ENOMEM;
1242 goto probe_failed;
1243 }
1244
1245 /*
1246 * Initialize the Host adapter request/response queues and
1247 * firmware
1248 * NOTE: interrupts enabled upon successful completion
1249 */
1250 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1251 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1252 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1253 "(%d)\n", __func__, init_retry_count));
1254 qla4xxx_soft_reset(ha);
1255 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1256 }
1257 if (status == QLA_ERROR) {
1258 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1259
1260 ret = -ENODEV;
1261 goto probe_failed;
1262 }
1263
1264 host->cmd_per_lun = 3;
1265 host->max_channel = 0;
1266 host->max_lun = MAX_LUNS - 1;
1267 host->max_id = MAX_TARGETS;
1268 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1269 host->can_queue = MAX_SRBS ;
1270 host->transportt = qla4xxx_scsi_transport;
1271
1272 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1273 if (ret) {
1274 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1275 goto probe_failed;
1276 }
1277
1278 /* Startup the kernel thread for this host adapter. */
1279 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1280 "qla4xxx_dpc\n", __func__));
1281 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1282 ha->dpc_thread = create_singlethread_workqueue(buf);
1283 if (!ha->dpc_thread) {
1284 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1285 ret = -ENODEV;
1286 goto probe_failed;
1287 }
1288 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1289
1290 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1291 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1292 if (ret) {
1293 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1294 " already in use.\n", pdev->irq);
1295 goto probe_failed;
1296 }
1297 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1298 host->irq = pdev->irq;
1299 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1300
1301 qla4xxx_enable_intrs(ha);
1302
1303 /* Start timer thread. */
1304 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1305
1306 set_bit(AF_INIT_DONE, &ha->flags);
1307
1308 pci_set_drvdata(pdev, ha);
1309
1310 ret = scsi_add_host(host, &pdev->dev);
1311 if (ret)
1312 goto probe_failed;
1313
1314 /* Update transport device information for all devices. */
1315 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1316 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1317 if (qla4xxx_add_sess(ddb_entry))
1318 goto remove_host;
1319 }
1320
1321 printk(KERN_INFO
1322 " QLogic iSCSI HBA Driver version: %s\n"
1323 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1324 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1325 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1326 ha->patch_number, ha->build_number);
1327
1328 return 0;
1329
1330 remove_host:
1331 qla4xxx_free_ddb_list(ha);
1332 scsi_remove_host(host);
1333
1334 probe_failed:
1335 qla4xxx_free_adapter(ha);
1336 scsi_host_put(ha->host);
1337
1338 probe_disable_device:
1339 pci_disable_device(pdev);
1340
1341 return ret;
1342 }
1343
1344 /**
1345 * qla4xxx_remove_adapter - calback function to remove adapter.
1346 * @pci_dev: PCI device pointer
1347 **/
1348 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1349 {
1350 struct scsi_qla_host *ha;
1351
1352 ha = pci_get_drvdata(pdev);
1353
1354 qla4xxx_disable_intrs(ha);
1355
1356 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1357 ssleep(1);
1358
1359 /* remove devs from iscsi_sessions to scsi_devices */
1360 qla4xxx_free_ddb_list(ha);
1361
1362 scsi_remove_host(ha->host);
1363
1364 qla4xxx_free_adapter(ha);
1365
1366 scsi_host_put(ha->host);
1367
1368 pci_set_drvdata(pdev, NULL);
1369 }
1370
1371 /**
1372 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1373 * @ha: HA context
1374 *
1375 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1376 * supported addressing method.
1377 */
1378 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1379 {
1380 int retval;
1381
1382 /* Update our PCI device dma_mask for full 64 bit mask */
1383 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1384 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1385 dev_dbg(&ha->pdev->dev,
1386 "Failed to set 64 bit PCI consistent mask; "
1387 "using 32 bit.\n");
1388 retval = pci_set_consistent_dma_mask(ha->pdev,
1389 DMA_32BIT_MASK);
1390 }
1391 } else
1392 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1393 }
1394
1395 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1396 {
1397 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1398 struct ddb_entry *ddb = sess->dd_data;
1399
1400 sdev->hostdata = ddb;
1401 sdev->tagged_supported = 1;
1402 scsi_activate_tcq(sdev, sdev->host->can_queue);
1403 return 0;
1404 }
1405
1406 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1407 {
1408 sdev->tagged_supported = 1;
1409 return 0;
1410 }
1411
1412 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1413 {
1414 scsi_deactivate_tcq(sdev, 1);
1415 }
1416
1417 /**
1418 * qla4xxx_del_from_active_array - returns an active srb
1419 * @ha: Pointer to host adapter structure.
1420 * @index: index into to the active_array
1421 *
1422 * This routine removes and returns the srb at the specified index
1423 **/
1424 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1425 {
1426 struct srb *srb = NULL;
1427 struct scsi_cmnd *cmd;
1428
1429 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1430 return srb;
1431
1432 if (!(srb = (struct srb *)cmd->host_scribble))
1433 return srb;
1434
1435 /* update counters */
1436 if (srb->flags & SRB_DMA_VALID) {
1437 ha->req_q_count += srb->iocb_cnt;
1438 ha->iocb_cnt -= srb->iocb_cnt;
1439 if (srb->cmd)
1440 srb->cmd->host_scribble = NULL;
1441 }
1442 return srb;
1443 }
1444
1445 /**
1446 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1447 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1448 * @cmd: Scsi Command to wait on.
1449 *
1450 * This routine waits for the command to be returned by the Firmware
1451 * for some max time.
1452 **/
1453 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1454 struct scsi_cmnd *cmd)
1455 {
1456 int done = 0;
1457 struct srb *rp;
1458 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1459
1460 do {
1461 /* Checking to see if its returned to OS */
1462 rp = (struct srb *) cmd->SCp.ptr;
1463 if (rp == NULL) {
1464 done++;
1465 break;
1466 }
1467
1468 msleep(2000);
1469 } while (max_wait_time--);
1470
1471 return done;
1472 }
1473
1474 /**
1475 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1476 * @ha: Pointer to host adapter structure
1477 **/
1478 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1479 {
1480 unsigned long wait_online;
1481
1482 wait_online = jiffies + (30 * HZ);
1483 while (time_before(jiffies, wait_online)) {
1484
1485 if (adapter_up(ha))
1486 return QLA_SUCCESS;
1487 else if (ha->retry_reset_ha_cnt == 0)
1488 return QLA_ERROR;
1489
1490 msleep(2000);
1491 }
1492
1493 return QLA_ERROR;
1494 }
1495
1496 /**
1497 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1498 * @ha: pointer to to HBA
1499 * @t: target id
1500 * @l: lun id
1501 *
1502 * This function waits for all outstanding commands to a lun to complete. It
1503 * returns 0 if all pending commands are returned and 1 otherwise.
1504 **/
1505 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1506 int t, int l)
1507 {
1508 int cnt;
1509 int status = 0;
1510 struct scsi_cmnd *cmd;
1511
1512 /*
1513 * Waiting for all commands for the designated target in the active
1514 * array
1515 */
1516 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1517 cmd = scsi_host_find_tag(ha->host, cnt);
1518 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1519 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1520 status++;
1521 break;
1522 }
1523 }
1524 }
1525 return status;
1526 }
1527
1528 /**
1529 * qla4xxx_eh_device_reset - callback for target reset.
1530 * @cmd: Pointer to Linux's SCSI command structure
1531 *
1532 * This routine is called by the Linux OS to reset all luns on the
1533 * specified target.
1534 **/
1535 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1536 {
1537 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1538 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1539 struct srb *sp;
1540 int ret = FAILED, stat;
1541
1542 sp = (struct srb *) cmd->SCp.ptr;
1543 if (!sp || !ddb_entry)
1544 return ret;
1545
1546 dev_info(&ha->pdev->dev,
1547 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1548 cmd->device->channel, cmd->device->id, cmd->device->lun);
1549
1550 DEBUG2(printk(KERN_INFO
1551 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1552 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1553 cmd, jiffies, cmd->timeout_per_command / HZ,
1554 ha->dpc_flags, cmd->result, cmd->allowed));
1555
1556 /* FIXME: wait for hba to go online */
1557 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1558 if (stat != QLA_SUCCESS) {
1559 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1560 goto eh_dev_reset_done;
1561 }
1562
1563 /* Send marker. */
1564 ha->marker_needed = 1;
1565
1566 /*
1567 * If we are coming down the EH path, wait for all commands to complete
1568 * for the device.
1569 */
1570 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1571 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1572 cmd->device->id,
1573 cmd->device->lun)){
1574 dev_info(&ha->pdev->dev,
1575 "DEVICE RESET FAILED - waiting for "
1576 "commands.\n");
1577 goto eh_dev_reset_done;
1578 }
1579 }
1580
1581 dev_info(&ha->pdev->dev,
1582 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1583 ha->host_no, cmd->device->channel, cmd->device->id,
1584 cmd->device->lun);
1585
1586 ret = SUCCESS;
1587
1588 eh_dev_reset_done:
1589
1590 return ret;
1591 }
1592
1593 /**
1594 * qla4xxx_eh_host_reset - kernel callback
1595 * @cmd: Pointer to Linux's SCSI command structure
1596 *
1597 * This routine is invoked by the Linux kernel to perform fatal error
1598 * recovery on the specified adapter.
1599 **/
1600 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1601 {
1602 int return_status = FAILED;
1603 struct scsi_qla_host *ha;
1604
1605 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1606
1607 dev_info(&ha->pdev->dev,
1608 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1609 cmd->device->channel, cmd->device->id, cmd->device->lun);
1610
1611 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1612 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1613 "DEAD.\n", ha->host_no, cmd->device->channel,
1614 __func__));
1615
1616 return FAILED;
1617 }
1618
1619 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1620 return_status = SUCCESS;
1621 }
1622
1623 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1624 return_status == FAILED ? "FAILED" : "SUCCEDED");
1625
1626 return return_status;
1627 }
1628
1629
1630 static struct pci_device_id qla4xxx_pci_tbl[] = {
1631 {
1632 .vendor = PCI_VENDOR_ID_QLOGIC,
1633 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1634 .subvendor = PCI_ANY_ID,
1635 .subdevice = PCI_ANY_ID,
1636 },
1637 {
1638 .vendor = PCI_VENDOR_ID_QLOGIC,
1639 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1640 .subvendor = PCI_ANY_ID,
1641 .subdevice = PCI_ANY_ID,
1642 },
1643 {
1644 .vendor = PCI_VENDOR_ID_QLOGIC,
1645 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1646 .subvendor = PCI_ANY_ID,
1647 .subdevice = PCI_ANY_ID,
1648 },
1649 {0, 0},
1650 };
1651 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1652
1653 static struct pci_driver qla4xxx_pci_driver = {
1654 .name = DRIVER_NAME,
1655 .id_table = qla4xxx_pci_tbl,
1656 .probe = qla4xxx_probe_adapter,
1657 .remove = qla4xxx_remove_adapter,
1658 };
1659
1660 static int __init qla4xxx_module_init(void)
1661 {
1662 int ret;
1663
1664 /* Allocate cache for SRBs. */
1665 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1666 SLAB_HWCACHE_ALIGN, NULL);
1667 if (srb_cachep == NULL) {
1668 printk(KERN_ERR
1669 "%s: Unable to allocate SRB cache..."
1670 "Failing load!\n", DRIVER_NAME);
1671 ret = -ENOMEM;
1672 goto no_srp_cache;
1673 }
1674
1675 /* Derive version string. */
1676 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1677 if (ql4xextended_error_logging)
1678 strcat(qla4xxx_version_str, "-debug");
1679
1680 qla4xxx_scsi_transport =
1681 iscsi_register_transport(&qla4xxx_iscsi_transport);
1682 if (!qla4xxx_scsi_transport){
1683 ret = -ENODEV;
1684 goto release_srb_cache;
1685 }
1686
1687 ret = pci_register_driver(&qla4xxx_pci_driver);
1688 if (ret)
1689 goto unregister_transport;
1690
1691 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1692 return 0;
1693
1694 unregister_transport:
1695 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1696 release_srb_cache:
1697 kmem_cache_destroy(srb_cachep);
1698 no_srp_cache:
1699 return ret;
1700 }
1701
1702 static void __exit qla4xxx_module_exit(void)
1703 {
1704 ql4_mod_unload = 1;
1705 pci_unregister_driver(&qla4xxx_pci_driver);
1706 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1707 kmem_cache_destroy(srb_cachep);
1708 }
1709
1710 module_init(qla4xxx_module_init);
1711 module_exit(qla4xxx_module_exit);
1712
1713 MODULE_AUTHOR("QLogic Corporation");
1714 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1715 MODULE_LICENSE("GPL");
1716 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
WRT350N Kernel Patches