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Linux 2.6.20
[pohmelfs.git] / drivers / scsi / qla4xxx / ql4_os.c
blob81fb7bd44f0167131a9eb7cc8f21a0d00172d91e
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 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
49 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
50
51 /*
52 * iSCSI template entry points
53 */
54 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
55 uint32_t enable, struct sockaddr *dst_addr);
56 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
57 enum iscsi_param param, char *buf);
58 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
59 enum iscsi_param param, char *buf);
60 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
61 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
62 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
63
64 /*
65 * SCSI host template entry points
66 */
67 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
68 void (*done) (struct scsi_cmnd *));
69 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
70 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
71 static int qla4xxx_slave_alloc(struct scsi_device *device);
72 static int qla4xxx_slave_configure(struct scsi_device *device);
73 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
74
75 static struct scsi_host_template qla4xxx_driver_template = {
76 .module = THIS_MODULE,
77 .name = DRIVER_NAME,
78 .proc_name = DRIVER_NAME,
79 .queuecommand = qla4xxx_queuecommand,
80
81 .eh_device_reset_handler = qla4xxx_eh_device_reset,
82 .eh_host_reset_handler = qla4xxx_eh_host_reset,
83
84 .slave_configure = qla4xxx_slave_configure,
85 .slave_alloc = qla4xxx_slave_alloc,
86 .slave_destroy = qla4xxx_slave_destroy,
87
88 .this_id = -1,
89 .cmd_per_lun = 3,
90 .use_clustering = ENABLE_CLUSTERING,
91 .sg_tablesize = SG_ALL,
92
93 .max_sectors = 0xFFFF,
94 };
95
96 static struct iscsi_transport qla4xxx_iscsi_transport = {
97 .owner = THIS_MODULE,
98 .name = DRIVER_NAME,
99 .param_mask = ISCSI_CONN_PORT |
100 ISCSI_CONN_ADDRESS |
101 ISCSI_TARGET_NAME |
102 ISCSI_TPGT,
103 .sessiondata_size = sizeof(struct ddb_entry),
104 .host_template = &qla4xxx_driver_template,
105
106 .tgt_dscvr = qla4xxx_tgt_dscvr,
107 .get_conn_param = qla4xxx_conn_get_param,
108 .get_session_param = qla4xxx_sess_get_param,
109 .start_conn = qla4xxx_conn_start,
110 .stop_conn = qla4xxx_conn_stop,
111 .session_recovery_timedout = qla4xxx_recovery_timedout,
112 };
113
114 static struct scsi_transport_template *qla4xxx_scsi_transport;
115
116 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
117 {
118 struct ddb_entry *ddb_entry = session->dd_data;
119 struct scsi_qla_host *ha = ddb_entry->ha;
120
121 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
122 "secs exhausted, marking device DEAD.\n", ha->host_no,
123 __func__, ddb_entry->fw_ddb_index,
124 ha->port_down_retry_count));
125
126 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
127
128 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
129 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
130 queue_work(ha->dpc_thread, &ha->dpc_work);
131 }
132
133 static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
134 {
135 struct iscsi_cls_session *session;
136 struct ddb_entry *ddb_entry;
137
138 session = iscsi_dev_to_session(conn->dev.parent);
139 ddb_entry = session->dd_data;
140
141 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
142 ddb_entry->ha->host_no, __func__,
143 ddb_entry->fw_ddb_index));
144 iscsi_unblock_session(session);
145 return 0;
146 }
147
148 static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
149 {
150 struct iscsi_cls_session *session;
151 struct ddb_entry *ddb_entry;
152
153 session = iscsi_dev_to_session(conn->dev.parent);
154 ddb_entry = session->dd_data;
155
156 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
157 ddb_entry->ha->host_no, __func__,
158 ddb_entry->fw_ddb_index));
159 if (flag == STOP_CONN_RECOVER)
160 iscsi_block_session(session);
161 else
162 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
163 }
164
165 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
166 enum iscsi_param param, char *buf)
167 {
168 struct ddb_entry *ddb_entry = sess->dd_data;
169 int len;
170
171 switch (param) {
172 case ISCSI_PARAM_TARGET_NAME:
173 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
174 ddb_entry->iscsi_name);
175 break;
176 case ISCSI_PARAM_TPGT:
177 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
178 break;
179 default:
180 return -ENOSYS;
181 }
182
183 return len;
184 }
185
186 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
187 enum iscsi_param param, char *buf)
188 {
189 struct iscsi_cls_session *session;
190 struct ddb_entry *ddb_entry;
191 int len;
192
193 session = iscsi_dev_to_session(conn->dev.parent);
194 ddb_entry = session->dd_data;
195
196 switch (param) {
197 case ISCSI_PARAM_CONN_PORT:
198 len = sprintf(buf, "%hu\n", ddb_entry->port);
199 break;
200 case ISCSI_PARAM_CONN_ADDRESS:
201 /* TODO: what are the ipv6 bits */
202 len = sprintf(buf, "%u.%u.%u.%u\n",
203 NIPQUAD(ddb_entry->ip_addr));
204 break;
205 default:
206 return -ENOSYS;
207 }
208
209 return len;
210 }
211
212 static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
213 uint32_t enable, struct sockaddr *dst_addr)
214 {
215 struct scsi_qla_host *ha;
216 struct Scsi_Host *shost;
217 struct sockaddr_in *addr;
218 struct sockaddr_in6 *addr6;
219 int ret = 0;
220
221 shost = scsi_host_lookup(host_no);
222 if (IS_ERR(shost)) {
223 printk(KERN_ERR "Could not find host no %u\n", host_no);
224 return -ENODEV;
225 }
226
227 ha = (struct scsi_qla_host *) shost->hostdata;
228
229 switch (type) {
230 case ISCSI_TGT_DSCVR_SEND_TARGETS:
231 if (dst_addr->sa_family == AF_INET) {
232 addr = (struct sockaddr_in *)dst_addr;
233 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
234 addr->sin_port) != QLA_SUCCESS)
235 ret = -EIO;
236 } else if (dst_addr->sa_family == AF_INET6) {
237 /*
238 * TODO: fix qla4xxx_send_tgts
239 */
240 addr6 = (struct sockaddr_in6 *)dst_addr;
241 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
242 addr6->sin6_port) != QLA_SUCCESS)
243 ret = -EIO;
244 } else
245 ret = -ENOSYS;
246 break;
247 default:
248 ret = -ENOSYS;
249 }
250
251 scsi_host_put(shost);
252 return ret;
253 }
254
255 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
256 {
257 if (!ddb_entry->sess)
258 return;
259
260 if (ddb_entry->conn) {
261 iscsi_if_destroy_session_done(ddb_entry->conn);
262 iscsi_destroy_conn(ddb_entry->conn);
263 iscsi_remove_session(ddb_entry->sess);
264 }
265 iscsi_free_session(ddb_entry->sess);
266 }
267
268 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
269 {
270 int err;
271
272 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
273 if (err) {
274 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
275 return err;
276 }
277
278 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
279 if (!ddb_entry->conn) {
280 iscsi_remove_session(ddb_entry->sess);
281 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
282 return -ENOMEM;
283 }
284
285 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
286 iscsi_if_create_session_done(ddb_entry->conn);
287 return 0;
288 }
289
290 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
291 {
292 struct ddb_entry *ddb_entry;
293 struct iscsi_cls_session *sess;
294
295 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
296 if (!sess)
297 return NULL;
298
299 ddb_entry = sess->dd_data;
300 memset(ddb_entry, 0, sizeof(*ddb_entry));
301 ddb_entry->ha = ha;
302 ddb_entry->sess = sess;
303 return ddb_entry;
304 }
305
306 /*
307 * Timer routines
308 */
309
310 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
311 unsigned long interval)
312 {
313 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
314 __func__, ha->host->host_no));
315 init_timer(&ha->timer);
316 ha->timer.expires = jiffies + interval * HZ;
317 ha->timer.data = (unsigned long)ha;
318 ha->timer.function = (void (*)(unsigned long))func;
319 add_timer(&ha->timer);
320 ha->timer_active = 1;
321 }
322
323 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
324 {
325 del_timer_sync(&ha->timer);
326 ha->timer_active = 0;
327 }
328
329 /***
330 * qla4xxx_mark_device_missing - mark a device as missing.
331 * @ha: Pointer to host adapter structure.
332 * @ddb_entry: Pointer to device database entry
333 *
334 * This routine marks a device missing and resets the relogin retry count.
335 **/
336 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
337 struct ddb_entry *ddb_entry)
338 {
339 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
340 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
341 ha->host_no, ddb_entry->bus, ddb_entry->target,
342 ddb_entry->fw_ddb_index));
343 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
344 }
345
346 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
347 struct ddb_entry *ddb_entry,
348 struct scsi_cmnd *cmd,
349 void (*done)(struct scsi_cmnd *))
350 {
351 struct srb *srb;
352
353 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
354 if (!srb)
355 return srb;
356
357 atomic_set(&srb->ref_count, 1);
358 srb->ha = ha;
359 srb->ddb = ddb_entry;
360 srb->cmd = cmd;
361 srb->flags = 0;
362 cmd->SCp.ptr = (void *)srb;
363 cmd->scsi_done = done;
364
365 return srb;
366 }
367
368 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
369 {
370 struct scsi_cmnd *cmd = srb->cmd;
371
372 if (srb->flags & SRB_DMA_VALID) {
373 if (cmd->use_sg) {
374 pci_unmap_sg(ha->pdev, cmd->request_buffer,
375 cmd->use_sg, cmd->sc_data_direction);
376 } else if (cmd->request_bufflen) {
377 pci_unmap_single(ha->pdev, srb->dma_handle,
378 cmd->request_bufflen,
379 cmd->sc_data_direction);
380 }
381 srb->flags &= ~SRB_DMA_VALID;
382 }
383 cmd->SCp.ptr = NULL;
384 }
385
386 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
387 {
388 struct scsi_cmnd *cmd = srb->cmd;
389
390 qla4xxx_srb_free_dma(ha, srb);
391
392 mempool_free(srb, ha->srb_mempool);
393
394 cmd->scsi_done(cmd);
395 }
396
397 /**
398 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
399 * @cmd: Pointer to Linux's SCSI command structure
400 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
401 * that the command has been processed.
402 *
403 * Remarks:
404 * This routine is invoked by Linux to send a SCSI command to the driver.
405 * The mid-level driver tries to ensure that queuecommand never gets
406 * invoked concurrently with itself or the interrupt handler (although
407 * the interrupt handler may call this routine as part of request-
408 * completion handling). Unfortunely, it sometimes calls the scheduler
409 * in interrupt context which is a big NO! NO!.
410 **/
411 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
412 void (*done)(struct scsi_cmnd *))
413 {
414 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
415 struct ddb_entry *ddb_entry = cmd->device->hostdata;
416 struct srb *srb;
417 int rval;
418
419 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
420 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
421 cmd->result = DID_NO_CONNECT << 16;
422 goto qc_fail_command;
423 }
424 goto qc_host_busy;
425 }
426
427 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
428 goto qc_host_busy;
429
430 spin_unlock_irq(ha->host->host_lock);
431
432 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
433 if (!srb)
434 goto qc_host_busy_lock;
435
436 rval = qla4xxx_send_command_to_isp(ha, srb);
437 if (rval != QLA_SUCCESS)
438 goto qc_host_busy_free_sp;
439
440 spin_lock_irq(ha->host->host_lock);
441 return 0;
442
443 qc_host_busy_free_sp:
444 qla4xxx_srb_free_dma(ha, srb);
445 mempool_free(srb, ha->srb_mempool);
446
447 qc_host_busy_lock:
448 spin_lock_irq(ha->host->host_lock);
449
450 qc_host_busy:
451 return SCSI_MLQUEUE_HOST_BUSY;
452
453 qc_fail_command:
454 done(cmd);
455
456 return 0;
457 }
458
459 /**
460 * qla4xxx_mem_free - frees memory allocated to adapter
461 * @ha: Pointer to host adapter structure.
462 *
463 * Frees memory previously allocated by qla4xxx_mem_alloc
464 **/
465 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
466 {
467 if (ha->queues)
468 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
469 ha->queues_dma);
470
471 ha->queues_len = 0;
472 ha->queues = NULL;
473 ha->queues_dma = 0;
474 ha->request_ring = NULL;
475 ha->request_dma = 0;
476 ha->response_ring = NULL;
477 ha->response_dma = 0;
478 ha->shadow_regs = NULL;
479 ha->shadow_regs_dma = 0;
480
481 /* Free srb pool. */
482 if (ha->srb_mempool)
483 mempool_destroy(ha->srb_mempool);
484
485 ha->srb_mempool = NULL;
486
487 /* release io space registers */
488 if (ha->reg)
489 iounmap(ha->reg);
490 pci_release_regions(ha->pdev);
491 }
492
493 /**
494 * qla4xxx_mem_alloc - allocates memory for use by adapter.
495 * @ha: Pointer to host adapter structure
496 *
497 * Allocates DMA memory for request and response queues. Also allocates memory
498 * for srbs.
499 **/
500 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
501 {
502 unsigned long align;
503
504 /* Allocate contiguous block of DMA memory for queues. */
505 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
506 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
507 sizeof(struct shadow_regs) +
508 MEM_ALIGN_VALUE +
509 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
510 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
511 &ha->queues_dma, GFP_KERNEL);
512 if (ha->queues == NULL) {
513 dev_warn(&ha->pdev->dev,
514 "Memory Allocation failed - queues.\n");
515
516 goto mem_alloc_error_exit;
517 }
518 memset(ha->queues, 0, ha->queues_len);
519
520 /*
521 * As per RISC alignment requirements -- the bus-address must be a
522 * multiple of the request-ring size (in bytes).
523 */
524 align = 0;
525 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
526 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
527 (MEM_ALIGN_VALUE - 1));
528
529 /* Update request and response queue pointers. */
530 ha->request_dma = ha->queues_dma + align;
531 ha->request_ring = (struct queue_entry *) (ha->queues + align);
532 ha->response_dma = ha->queues_dma + align +
533 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
534 ha->response_ring = (struct queue_entry *) (ha->queues + align +
535 (REQUEST_QUEUE_DEPTH *
536 QUEUE_SIZE));
537 ha->shadow_regs_dma = ha->queues_dma + align +
538 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
539 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
540 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
541 (REQUEST_QUEUE_DEPTH *
542 QUEUE_SIZE) +
543 (RESPONSE_QUEUE_DEPTH *
544 QUEUE_SIZE));
545
546 /* Allocate memory for srb pool. */
547 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
548 mempool_free_slab, srb_cachep);
549 if (ha->srb_mempool == NULL) {
550 dev_warn(&ha->pdev->dev,
551 "Memory Allocation failed - SRB Pool.\n");
552
553 goto mem_alloc_error_exit;
554 }
555
556 return QLA_SUCCESS;
557
558 mem_alloc_error_exit:
559 qla4xxx_mem_free(ha);
560 return QLA_ERROR;
561 }
562
563 /**
564 * qla4xxx_timer - checks every second for work to do.
565 * @ha: Pointer to host adapter structure.
566 **/
567 static void qla4xxx_timer(struct scsi_qla_host *ha)
568 {
569 struct ddb_entry *ddb_entry, *dtemp;
570 int start_dpc = 0;
571
572 /* Search for relogin's to time-out and port down retry. */
573 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
574 /* Count down time between sending relogins */
575 if (adapter_up(ha) &&
576 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
577 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
578 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
579 INVALID_ENTRY) {
580 if (atomic_read(&ddb_entry->retry_relogin_timer)
581 == 0) {
582 atomic_set(&ddb_entry->
583 retry_relogin_timer,
584 INVALID_ENTRY);
585 set_bit(DPC_RELOGIN_DEVICE,
586 &ha->dpc_flags);
587 set_bit(DF_RELOGIN, &ddb_entry->flags);
588 DEBUG2(printk("scsi%ld: %s: index [%d]"
589 " login device\n",
590 ha->host_no, __func__,
591 ddb_entry->fw_ddb_index));
592 } else
593 atomic_dec(&ddb_entry->
594 retry_relogin_timer);
595 }
596 }
597
598 /* Wait for relogin to timeout */
599 if (atomic_read(&ddb_entry->relogin_timer) &&
600 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
601 /*
602 * If the relogin times out and the device is
603 * still NOT ONLINE then try and relogin again.
604 */
605 if (atomic_read(&ddb_entry->state) !=
606 DDB_STATE_ONLINE &&
607 ddb_entry->fw_ddb_device_state ==
608 DDB_DS_SESSION_FAILED) {
609 /* Reset retry relogin timer */
610 atomic_inc(&ddb_entry->relogin_retry_count);
611 DEBUG2(printk("scsi%ld: index[%d] relogin"
612 " timed out-retrying"
613 " relogin (%d)\n",
614 ha->host_no,
615 ddb_entry->fw_ddb_index,
616 atomic_read(&ddb_entry->
617 relogin_retry_count))
618 );
619 start_dpc++;
620 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
621 "initate relogin after"
622 " %d seconds\n",
623 ha->host_no, ddb_entry->bus,
624 ddb_entry->target,
625 ddb_entry->fw_ddb_index,
626 ddb_entry->default_time2wait + 4)
627 );
628
629 atomic_set(&ddb_entry->retry_relogin_timer,
630 ddb_entry->default_time2wait + 4);
631 }
632 }
633 }
634
635 /* Check for heartbeat interval. */
636 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
637 ha->heartbeat_interval != 0) {
638 ha->seconds_since_last_heartbeat++;
639 if (ha->seconds_since_last_heartbeat >
640 ha->heartbeat_interval + 2)
641 set_bit(DPC_RESET_HA, &ha->dpc_flags);
642 }
643
644
645 /* Wakeup the dpc routine for this adapter, if needed. */
646 if ((start_dpc ||
647 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
648 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
649 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
650 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
651 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
652 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
653 test_bit(DPC_AEN, &ha->dpc_flags)) &&
654 ha->dpc_thread) {
655 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
656 " - dpc flags = 0x%lx\n",
657 ha->host_no, __func__, ha->dpc_flags));
658 queue_work(ha->dpc_thread, &ha->dpc_work);
659 }
660
661 /* Reschedule timer thread to call us back in one second */
662 mod_timer(&ha->timer, jiffies + HZ);
663
664 DEBUG2(ha->seconds_since_last_intr++);
665 }
666
667 /**
668 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
669 * @ha: Pointer to host adapter structure.
670 *
671 * This routine stalls the driver until all outstanding commands are returned.
672 * Caller must release the Hardware Lock prior to calling this routine.
673 **/
674 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
675 {
676 uint32_t index = 0;
677 int stat = QLA_SUCCESS;
678 unsigned long flags;
679 struct scsi_cmnd *cmd;
680 int wait_cnt = WAIT_CMD_TOV; /*
681 * Initialized for 30 seconds as we
682 * expect all commands to retuned
683 * ASAP.
684 */
685
686 while (wait_cnt) {
687 spin_lock_irqsave(&ha->hardware_lock, flags);
688 /* Find a command that hasn't completed. */
689 for (index = 0; index < ha->host->can_queue; index++) {
690 cmd = scsi_host_find_tag(ha->host, index);
691 if (cmd != NULL)
692 break;
693 }
694 spin_unlock_irqrestore(&ha->hardware_lock, flags);
695
696 /* If No Commands are pending, wait is complete */
697 if (index == ha->host->can_queue) {
698 break;
699 }
700
701 /* If we timed out on waiting for commands to come back
702 * return ERROR.
703 */
704 wait_cnt--;
705 if (wait_cnt == 0)
706 stat = QLA_ERROR;
707 else {
708 msleep(1000);
709 }
710 } /* End of While (wait_cnt) */
711
712 return stat;
713 }
714
715 static void qla4xxx_hw_reset(struct scsi_qla_host *ha)
716 {
717 uint32_t ctrl_status;
718 unsigned long flags = 0;
719
720 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
721
722 spin_lock_irqsave(&ha->hardware_lock, flags);
723
724 /*
725 * If the SCSI Reset Interrupt bit is set, clear it.
726 * Otherwise, the Soft Reset won't work.
727 */
728 ctrl_status = readw(&ha->reg->ctrl_status);
729 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
730 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
731
732 /* Issue Soft Reset */
733 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
734 readl(&ha->reg->ctrl_status);
735
736 spin_unlock_irqrestore(&ha->hardware_lock, flags);
737 }
738
739 /**
740 * qla4xxx_soft_reset - performs soft reset.
741 * @ha: Pointer to host adapter structure.
742 **/
743 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
744 {
745 uint32_t max_wait_time;
746 unsigned long flags = 0;
747 int status = QLA_ERROR;
748 uint32_t ctrl_status;
749
750 qla4xxx_hw_reset(ha);
751
752 /* Wait until the Network Reset Intr bit is cleared */
753 max_wait_time = RESET_INTR_TOV;
754 do {
755 spin_lock_irqsave(&ha->hardware_lock, flags);
756 ctrl_status = readw(&ha->reg->ctrl_status);
757 spin_unlock_irqrestore(&ha->hardware_lock, flags);
758
759 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
760 break;
761
762 msleep(1000);
763 } while ((--max_wait_time));
764
765 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
766 DEBUG2(printk(KERN_WARNING
767 "scsi%ld: Network Reset Intr not cleared by "
768 "Network function, clearing it now!\n",
769 ha->host_no));
770 spin_lock_irqsave(&ha->hardware_lock, flags);
771 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
772 readl(&ha->reg->ctrl_status);
773 spin_unlock_irqrestore(&ha->hardware_lock, flags);
774 }
775
776 /* Wait until the firmware tells us the Soft Reset is done */
777 max_wait_time = SOFT_RESET_TOV;
778 do {
779 spin_lock_irqsave(&ha->hardware_lock, flags);
780 ctrl_status = readw(&ha->reg->ctrl_status);
781 spin_unlock_irqrestore(&ha->hardware_lock, flags);
782
783 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
784 status = QLA_SUCCESS;
785 break;
786 }
787
788 msleep(1000);
789 } while ((--max_wait_time));
790
791 /*
792 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
793 * after the soft reset has taken place.
794 */
795 spin_lock_irqsave(&ha->hardware_lock, flags);
796 ctrl_status = readw(&ha->reg->ctrl_status);
797 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
798 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
799 readl(&ha->reg->ctrl_status);
800 }
801 spin_unlock_irqrestore(&ha->hardware_lock, flags);
802
803 /* If soft reset fails then most probably the bios on other
804 * function is also enabled.
805 * Since the initialization is sequential the other fn
806 * wont be able to acknowledge the soft reset.
807 * Issue a force soft reset to workaround this scenario.
808 */
809 if (max_wait_time == 0) {
810 /* Issue Force Soft Reset */
811 spin_lock_irqsave(&ha->hardware_lock, flags);
812 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
813 readl(&ha->reg->ctrl_status);
814 spin_unlock_irqrestore(&ha->hardware_lock, flags);
815 /* Wait until the firmware tells us the Soft Reset is done */
816 max_wait_time = SOFT_RESET_TOV;
817 do {
818 spin_lock_irqsave(&ha->hardware_lock, flags);
819 ctrl_status = readw(&ha->reg->ctrl_status);
820 spin_unlock_irqrestore(&ha->hardware_lock, flags);
821
822 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
823 status = QLA_SUCCESS;
824 break;
825 }
826
827 msleep(1000);
828 } while ((--max_wait_time));
829 }
830
831 return status;
832 }
833
834 /**
835 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
836 * @ha: Pointer to host adapter structure.
837 *
838 * This routine is called just prior to a HARD RESET to return all
839 * outstanding commands back to the Operating System.
840 * Caller should make sure that the following locks are released
841 * before this calling routine: Hardware lock, and io_request_lock.
842 **/
843 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
844 {
845 struct srb *srb;
846 int i;
847 unsigned long flags;
848
849 spin_lock_irqsave(&ha->hardware_lock, flags);
850 for (i = 0; i < ha->host->can_queue; i++) {
851 srb = qla4xxx_del_from_active_array(ha, i);
852 if (srb != NULL) {
853 srb->cmd->result = DID_RESET << 16;
854 qla4xxx_srb_compl(ha, srb);
855 }
856 }
857 spin_unlock_irqrestore(&ha->hardware_lock, flags);
858
859 }
860
861 /**
862 * qla4xxx_recover_adapter - recovers adapter after a fatal error
863 * @ha: Pointer to host adapter structure.
864 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
865 * after adapter recovery has completed.
866 * 0=preserve ddb list, 1=destroy and rebuild ddb list
867 **/
868 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
869 uint8_t renew_ddb_list)
870 {
871 int status;
872
873 /* Stall incoming I/O until we are done */
874 clear_bit(AF_ONLINE, &ha->flags);
875 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
876 __func__));
877
878 /* Wait for outstanding commands to complete.
879 * Stalls the driver for max 30 secs
880 */
881 status = qla4xxx_cmd_wait(ha);
882
883 qla4xxx_disable_intrs(ha);
884
885 /* Flush any pending ddb changed AENs */
886 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
887
888 /* Reset the firmware. If successful, function
889 * returns with ISP interrupts enabled.
890 */
891 if (status == QLA_SUCCESS) {
892 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
893 ha->host_no, __func__));
894 qla4xxx_flush_active_srbs(ha);
895 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
896 status = qla4xxx_soft_reset(ha);
897 else
898 status = QLA_ERROR;
899 }
900
901 /* Flush any pending ddb changed AENs */
902 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
903
904 /* Re-initialize firmware. If successful, function returns
905 * with ISP interrupts enabled */
906 if (status == QLA_SUCCESS) {
907 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
908 ha->host_no, __func__));
909
910 /* If successful, AF_ONLINE flag set in
911 * qla4xxx_initialize_adapter */
912 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
913 }
914
915 /* Failed adapter initialization?
916 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
917 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
918 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
919 /* Adapter initialization failed, see if we can retry
920 * resetting the ha */
921 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
922 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
923 DEBUG2(printk("scsi%ld: recover adapter - retrying "
924 "(%d) more times\n", ha->host_no,
925 ha->retry_reset_ha_cnt));
926 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
927 status = QLA_ERROR;
928 } else {
929 if (ha->retry_reset_ha_cnt > 0) {
930 /* Schedule another Reset HA--DPC will retry */
931 ha->retry_reset_ha_cnt--;
932 DEBUG2(printk("scsi%ld: recover adapter - "
933 "retry remaining %d\n",
934 ha->host_no,
935 ha->retry_reset_ha_cnt));
936 status = QLA_ERROR;
937 }
938
939 if (ha->retry_reset_ha_cnt == 0) {
940 /* Recover adapter retries have been exhausted.
941 * Adapter DEAD */
942 DEBUG2(printk("scsi%ld: recover adapter "
943 "failed - board disabled\n",
944 ha->host_no));
945 qla4xxx_flush_active_srbs(ha);
946 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
947 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
948 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
949 &ha->dpc_flags);
950 status = QLA_ERROR;
951 }
952 }
953 } else {
954 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
955 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
956 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
957 }
958
959 ha->adapter_error_count++;
960
961 if (status == QLA_SUCCESS)
962 qla4xxx_enable_intrs(ha);
963
964 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
965 return status;
966 }
967
968 /**
969 * qla4xxx_do_dpc - dpc routine
970 * @data: in our case pointer to adapter structure
971 *
972 * This routine is a task that is schedule by the interrupt handler
973 * to perform the background processing for interrupts. We put it
974 * on a task queue that is consumed whenever the scheduler runs; that's
975 * so you can do anything (i.e. put the process to sleep etc). In fact,
976 * the mid-level tries to sleep when it reaches the driver threshold
977 * "host->can_queue". This can cause a panic if we were in our interrupt code.
978 **/
979 static void qla4xxx_do_dpc(struct work_struct *work)
980 {
981 struct scsi_qla_host *ha =
982 container_of(work, struct scsi_qla_host, dpc_work);
983 struct ddb_entry *ddb_entry, *dtemp;
984 int status = QLA_ERROR;
985
986 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
987 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
988 ha->host_no, __func__, ha->flags, ha->dpc_flags,
989 readw(&ha->reg->ctrl_status)));
990
991 /* Initialization not yet finished. Don't do anything yet. */
992 if (!test_bit(AF_INIT_DONE, &ha->flags))
993 return;
994
995 if (adapter_up(ha) ||
996 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
997 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
998 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
999 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1000 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1001 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1002
1003 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1004 uint8_t wait_time = RESET_INTR_TOV;
1005
1006 while ((readw(&ha->reg->ctrl_status) &
1007 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1008 if (--wait_time == 0)
1009 break;
1010 msleep(1000);
1011 }
1012 if (wait_time == 0)
1013 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1014 "bit not cleared-- resetting\n",
1015 ha->host_no, __func__));
1016 qla4xxx_flush_active_srbs(ha);
1017 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1018 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1019 status = qla4xxx_initialize_adapter(ha,
1020 PRESERVE_DDB_LIST);
1021 }
1022 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1023 if (status == QLA_SUCCESS)
1024 qla4xxx_enable_intrs(ha);
1025 }
1026 }
1027
1028 /* ---- process AEN? --- */
1029 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1030 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1031
1032 /* ---- Get DHCP IP Address? --- */
1033 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1034 qla4xxx_get_dhcp_ip_address(ha);
1035
1036 /* ---- relogin device? --- */
1037 if (adapter_up(ha) &&
1038 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1039 list_for_each_entry_safe(ddb_entry, dtemp,
1040 &ha->ddb_list, list) {
1041 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1042 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1043 qla4xxx_relogin_device(ha, ddb_entry);
1044
1045 /*
1046 * If mbx cmd times out there is no point
1047 * in continuing further.
1048 * With large no of targets this can hang
1049 * the system.
1050 */
1051 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1052 printk(KERN_WARNING "scsi%ld: %s: "
1053 "need to reset hba\n",
1054 ha->host_no, __func__);
1055 break;
1056 }
1057 }
1058 }
1059 }
1060
1061 /**
1062 * qla4xxx_free_adapter - release the adapter
1063 * @ha: pointer to adapter structure
1064 **/
1065 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1066 {
1067
1068 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1069 /* Turn-off interrupts on the card. */
1070 qla4xxx_disable_intrs(ha);
1071 }
1072
1073 /* Kill the kernel thread for this host */
1074 if (ha->dpc_thread)
1075 destroy_workqueue(ha->dpc_thread);
1076
1077 /* Issue Soft Reset to put firmware in unknown state */
1078 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1079 qla4xxx_hw_reset(ha);
1080
1081 /* Remove timer thread, if present */
1082 if (ha->timer_active)
1083 qla4xxx_stop_timer(ha);
1084
1085 /* free extra memory */
1086 qla4xxx_mem_free(ha);
1087
1088 /* Detach interrupts */
1089 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1090 free_irq(ha->pdev->irq, ha);
1091
1092 pci_disable_device(ha->pdev);
1093
1094 }
1095
1096 /***
1097 * qla4xxx_iospace_config - maps registers
1098 * @ha: pointer to adapter structure
1099 *
1100 * This routines maps HBA's registers from the pci address space
1101 * into the kernel virtual address space for memory mapped i/o.
1102 **/
1103 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1104 {
1105 unsigned long pio, pio_len, pio_flags;
1106 unsigned long mmio, mmio_len, mmio_flags;
1107
1108 pio = pci_resource_start(ha->pdev, 0);
1109 pio_len = pci_resource_len(ha->pdev, 0);
1110 pio_flags = pci_resource_flags(ha->pdev, 0);
1111 if (pio_flags & IORESOURCE_IO) {
1112 if (pio_len < MIN_IOBASE_LEN) {
1113 dev_warn(&ha->pdev->dev,
1114 "Invalid PCI I/O region size\n");
1115 pio = 0;
1116 }
1117 } else {
1118 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1119 pio = 0;
1120 }
1121
1122 /* Use MMIO operations for all accesses. */
1123 mmio = pci_resource_start(ha->pdev, 1);
1124 mmio_len = pci_resource_len(ha->pdev, 1);
1125 mmio_flags = pci_resource_flags(ha->pdev, 1);
1126
1127 if (!(mmio_flags & IORESOURCE_MEM)) {
1128 dev_err(&ha->pdev->dev,
1129 "region #0 not an MMIO resource, aborting\n");
1130
1131 goto iospace_error_exit;
1132 }
1133 if (mmio_len < MIN_IOBASE_LEN) {
1134 dev_err(&ha->pdev->dev,
1135 "Invalid PCI mem region size, aborting\n");
1136 goto iospace_error_exit;
1137 }
1138
1139 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1140 dev_warn(&ha->pdev->dev,
1141 "Failed to reserve PIO/MMIO regions\n");
1142
1143 goto iospace_error_exit;
1144 }
1145
1146 ha->pio_address = pio;
1147 ha->pio_length = pio_len;
1148 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1149 if (!ha->reg) {
1150 dev_err(&ha->pdev->dev,
1151 "cannot remap MMIO, aborting\n");
1152
1153 goto iospace_error_exit;
1154 }
1155
1156 return 0;
1157
1158 iospace_error_exit:
1159 return -ENOMEM;
1160 }
1161
1162 /**
1163 * qla4xxx_probe_adapter - callback function to probe HBA
1164 * @pdev: pointer to pci_dev structure
1165 * @pci_device_id: pointer to pci_device entry
1166 *
1167 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1168 * It returns zero if successful. It also initializes all data necessary for
1169 * the driver.
1170 **/
1171 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1172 const struct pci_device_id *ent)
1173 {
1174 int ret = -ENODEV, status;
1175 struct Scsi_Host *host;
1176 struct scsi_qla_host *ha;
1177 struct ddb_entry *ddb_entry, *ddbtemp;
1178 uint8_t init_retry_count = 0;
1179 char buf[34];
1180
1181 if (pci_enable_device(pdev))
1182 return -1;
1183
1184 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1185 if (host == NULL) {
1186 printk(KERN_WARNING
1187 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1188 goto probe_disable_device;
1189 }
1190
1191 /* Clear our data area */
1192 ha = (struct scsi_qla_host *) host->hostdata;
1193 memset(ha, 0, sizeof(*ha));
1194
1195 /* Save the information from PCI BIOS. */
1196 ha->pdev = pdev;
1197 ha->host = host;
1198 ha->host_no = host->host_no;
1199
1200 /* Configure PCI I/O space. */
1201 ret = qla4xxx_iospace_config(ha);
1202 if (ret)
1203 goto probe_failed;
1204
1205 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1206 pdev->device, pdev->irq, ha->reg);
1207
1208 qla4xxx_config_dma_addressing(ha);
1209
1210 /* Initialize lists and spinlocks. */
1211 INIT_LIST_HEAD(&ha->ddb_list);
1212 INIT_LIST_HEAD(&ha->free_srb_q);
1213
1214 mutex_init(&ha->mbox_sem);
1215
1216 spin_lock_init(&ha->hardware_lock);
1217
1218 /* Allocate dma buffers */
1219 if (qla4xxx_mem_alloc(ha)) {
1220 dev_warn(&ha->pdev->dev,
1221 "[ERROR] Failed to allocate memory for adapter\n");
1222
1223 ret = -ENOMEM;
1224 goto probe_failed;
1225 }
1226
1227 /*
1228 * Initialize the Host adapter request/response queues and
1229 * firmware
1230 * NOTE: interrupts enabled upon successful completion
1231 */
1232 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1233 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1234 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1235 "(%d)\n", __func__, init_retry_count));
1236 qla4xxx_soft_reset(ha);
1237 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1238 }
1239 if (status == QLA_ERROR) {
1240 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1241
1242 ret = -ENODEV;
1243 goto probe_failed;
1244 }
1245
1246 host->cmd_per_lun = 3;
1247 host->max_channel = 0;
1248 host->max_lun = MAX_LUNS - 1;
1249 host->max_id = MAX_TARGETS;
1250 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1251 host->can_queue = MAX_SRBS ;
1252 host->transportt = qla4xxx_scsi_transport;
1253
1254 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1255 if (ret) {
1256 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1257 goto probe_failed;
1258 }
1259
1260 /* Startup the kernel thread for this host adapter. */
1261 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1262 "qla4xxx_dpc\n", __func__));
1263 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1264 ha->dpc_thread = create_singlethread_workqueue(buf);
1265 if (!ha->dpc_thread) {
1266 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1267 ret = -ENODEV;
1268 goto probe_failed;
1269 }
1270 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1271
1272 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1273 SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha);
1274 if (ret) {
1275 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1276 " already in use.\n", pdev->irq);
1277 goto probe_failed;
1278 }
1279 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1280 host->irq = pdev->irq;
1281 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1282
1283 qla4xxx_enable_intrs(ha);
1284
1285 /* Start timer thread. */
1286 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1287
1288 set_bit(AF_INIT_DONE, &ha->flags);
1289
1290 pci_set_drvdata(pdev, ha);
1291
1292 ret = scsi_add_host(host, &pdev->dev);
1293 if (ret)
1294 goto probe_failed;
1295
1296 /* Update transport device information for all devices. */
1297 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1298 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1299 if (qla4xxx_add_sess(ddb_entry))
1300 goto remove_host;
1301 }
1302
1303 printk(KERN_INFO
1304 " QLogic iSCSI HBA Driver version: %s\n"
1305 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1306 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1307 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1308 ha->patch_number, ha->build_number);
1309
1310 return 0;
1311
1312 remove_host:
1313 qla4xxx_free_ddb_list(ha);
1314 scsi_remove_host(host);
1315
1316 probe_failed:
1317 qla4xxx_free_adapter(ha);
1318 scsi_host_put(ha->host);
1319
1320 probe_disable_device:
1321 pci_disable_device(pdev);
1322
1323 return ret;
1324 }
1325
1326 /**
1327 * qla4xxx_remove_adapter - calback function to remove adapter.
1328 * @pci_dev: PCI device pointer
1329 **/
1330 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1331 {
1332 struct scsi_qla_host *ha;
1333
1334 ha = pci_get_drvdata(pdev);
1335
1336 /* remove devs from iscsi_sessions to scsi_devices */
1337 qla4xxx_free_ddb_list(ha);
1338
1339 scsi_remove_host(ha->host);
1340
1341 qla4xxx_free_adapter(ha);
1342
1343 scsi_host_put(ha->host);
1344
1345 pci_set_drvdata(pdev, NULL);
1346 }
1347
1348 /**
1349 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1350 * @ha: HA context
1351 *
1352 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1353 * supported addressing method.
1354 */
1355 void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1356 {
1357 int retval;
1358
1359 /* Update our PCI device dma_mask for full 64 bit mask */
1360 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1361 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1362 dev_dbg(&ha->pdev->dev,
1363 "Failed to set 64 bit PCI consistent mask; "
1364 "using 32 bit.\n");
1365 retval = pci_set_consistent_dma_mask(ha->pdev,
1366 DMA_32BIT_MASK);
1367 }
1368 } else
1369 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1370 }
1371
1372 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1373 {
1374 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1375 struct ddb_entry *ddb = sess->dd_data;
1376
1377 sdev->hostdata = ddb;
1378 sdev->tagged_supported = 1;
1379 scsi_activate_tcq(sdev, sdev->host->can_queue);
1380 return 0;
1381 }
1382
1383 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1384 {
1385 sdev->tagged_supported = 1;
1386 return 0;
1387 }
1388
1389 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1390 {
1391 scsi_deactivate_tcq(sdev, 1);
1392 }
1393
1394 /**
1395 * qla4xxx_del_from_active_array - returns an active srb
1396 * @ha: Pointer to host adapter structure.
1397 * @index: index into to the active_array
1398 *
1399 * This routine removes and returns the srb at the specified index
1400 **/
1401 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1402 {
1403 struct srb *srb = NULL;
1404 struct scsi_cmnd *cmd;
1405
1406 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1407 return srb;
1408
1409 if (!(srb = (struct srb *)cmd->host_scribble))
1410 return srb;
1411
1412 /* update counters */
1413 if (srb->flags & SRB_DMA_VALID) {
1414 ha->req_q_count += srb->iocb_cnt;
1415 ha->iocb_cnt -= srb->iocb_cnt;
1416 if (srb->cmd)
1417 srb->cmd->host_scribble = NULL;
1418 }
1419 return srb;
1420 }
1421
1422 /**
1423 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1424 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1425 * @cmd: Scsi Command to wait on.
1426 *
1427 * This routine waits for the command to be returned by the Firmware
1428 * for some max time.
1429 **/
1430 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1431 struct scsi_cmnd *cmd)
1432 {
1433 int done = 0;
1434 struct srb *rp;
1435 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1436
1437 do {
1438 /* Checking to see if its returned to OS */
1439 rp = (struct srb *) cmd->SCp.ptr;
1440 if (rp == NULL) {
1441 done++;
1442 break;
1443 }
1444
1445 msleep(2000);
1446 } while (max_wait_time--);
1447
1448 return done;
1449 }
1450
1451 /**
1452 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1453 * @ha: Pointer to host adapter structure
1454 **/
1455 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1456 {
1457 unsigned long wait_online;
1458
1459 wait_online = jiffies + (30 * HZ);
1460 while (time_before(jiffies, wait_online)) {
1461
1462 if (adapter_up(ha))
1463 return QLA_SUCCESS;
1464 else if (ha->retry_reset_ha_cnt == 0)
1465 return QLA_ERROR;
1466
1467 msleep(2000);
1468 }
1469
1470 return QLA_ERROR;
1471 }
1472
1473 /**
1474 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1475 * @ha: pointer to to HBA
1476 * @t: target id
1477 * @l: lun id
1478 *
1479 * This function waits for all outstanding commands to a lun to complete. It
1480 * returns 0 if all pending commands are returned and 1 otherwise.
1481 **/
1482 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1483 int t, int l)
1484 {
1485 int cnt;
1486 int status = 0;
1487 struct scsi_cmnd *cmd;
1488
1489 /*
1490 * Waiting for all commands for the designated target in the active
1491 * array
1492 */
1493 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1494 cmd = scsi_host_find_tag(ha->host, cnt);
1495 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1496 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1497 status++;
1498 break;
1499 }
1500 }
1501 }
1502 return status;
1503 }
1504
1505 /**
1506 * qla4xxx_eh_device_reset - callback for target reset.
1507 * @cmd: Pointer to Linux's SCSI command structure
1508 *
1509 * This routine is called by the Linux OS to reset all luns on the
1510 * specified target.
1511 **/
1512 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1513 {
1514 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1515 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1516 struct srb *sp;
1517 int ret = FAILED, stat;
1518
1519 sp = (struct srb *) cmd->SCp.ptr;
1520 if (!sp || !ddb_entry)
1521 return ret;
1522
1523 dev_info(&ha->pdev->dev,
1524 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1525 cmd->device->channel, cmd->device->id, cmd->device->lun);
1526
1527 DEBUG2(printk(KERN_INFO
1528 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1529 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1530 cmd, jiffies, cmd->timeout_per_command / HZ,
1531 ha->dpc_flags, cmd->result, cmd->allowed));
1532
1533 /* FIXME: wait for hba to go online */
1534 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1535 if (stat != QLA_SUCCESS) {
1536 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1537 goto eh_dev_reset_done;
1538 }
1539
1540 /* Send marker. */
1541 ha->marker_needed = 1;
1542
1543 /*
1544 * If we are coming down the EH path, wait for all commands to complete
1545 * for the device.
1546 */
1547 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1548 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1549 cmd->device->id,
1550 cmd->device->lun)){
1551 dev_info(&ha->pdev->dev,
1552 "DEVICE RESET FAILED - waiting for "
1553 "commands.\n");
1554 goto eh_dev_reset_done;
1555 }
1556 }
1557
1558 dev_info(&ha->pdev->dev,
1559 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1560 ha->host_no, cmd->device->channel, cmd->device->id,
1561 cmd->device->lun);
1562
1563 ret = SUCCESS;
1564
1565 eh_dev_reset_done:
1566
1567 return ret;
1568 }
1569
1570 /**
1571 * qla4xxx_eh_host_reset - kernel callback
1572 * @cmd: Pointer to Linux's SCSI command structure
1573 *
1574 * This routine is invoked by the Linux kernel to perform fatal error
1575 * recovery on the specified adapter.
1576 **/
1577 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1578 {
1579 int return_status = FAILED;
1580 struct scsi_qla_host *ha;
1581
1582 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1583
1584 dev_info(&ha->pdev->dev,
1585 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1586 cmd->device->channel, cmd->device->id, cmd->device->lun);
1587
1588 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1589 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1590 "DEAD.\n", ha->host_no, cmd->device->channel,
1591 __func__));
1592
1593 return FAILED;
1594 }
1595
1596 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1597 return_status = SUCCESS;
1598 }
1599
1600 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1601 return_status == FAILED ? "FAILED" : "SUCCEDED");
1602
1603 return return_status;
1604 }
1605
1606
1607 static struct pci_device_id qla4xxx_pci_tbl[] = {
1608 {
1609 .vendor = PCI_VENDOR_ID_QLOGIC,
1610 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1611 .subvendor = PCI_ANY_ID,
1612 .subdevice = PCI_ANY_ID,
1613 },
1614 {
1615 .vendor = PCI_VENDOR_ID_QLOGIC,
1616 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1617 .subvendor = PCI_ANY_ID,
1618 .subdevice = PCI_ANY_ID,
1619 },
1620 {
1621 .vendor = PCI_VENDOR_ID_QLOGIC,
1622 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1623 .subvendor = PCI_ANY_ID,
1624 .subdevice = PCI_ANY_ID,
1625 },
1626 {0, 0},
1627 };
1628 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1629
1630 struct pci_driver qla4xxx_pci_driver = {
1631 .name = DRIVER_NAME,
1632 .id_table = qla4xxx_pci_tbl,
1633 .probe = qla4xxx_probe_adapter,
1634 .remove = qla4xxx_remove_adapter,
1635 };
1636
1637 static int __init qla4xxx_module_init(void)
1638 {
1639 int ret;
1640
1641 /* Allocate cache for SRBs. */
1642 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1643 SLAB_HWCACHE_ALIGN, NULL, NULL);
1644 if (srb_cachep == NULL) {
1645 printk(KERN_ERR
1646 "%s: Unable to allocate SRB cache..."
1647 "Failing load!\n", DRIVER_NAME);
1648 ret = -ENOMEM;
1649 goto no_srp_cache;
1650 }
1651
1652 /* Derive version string. */
1653 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1654 if (ql4xextended_error_logging)
1655 strcat(qla4xxx_version_str, "-debug");
1656
1657 qla4xxx_scsi_transport =
1658 iscsi_register_transport(&qla4xxx_iscsi_transport);
1659 if (!qla4xxx_scsi_transport){
1660 ret = -ENODEV;
1661 goto release_srb_cache;
1662 }
1663
1664 ret = pci_register_driver(&qla4xxx_pci_driver);
1665 if (ret)
1666 goto unregister_transport;
1667
1668 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1669 return 0;
1670
1671 unregister_transport:
1672 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1673 release_srb_cache:
1674 kmem_cache_destroy(srb_cachep);
1675 no_srp_cache:
1676 return ret;
1677 }
1678
1679 static void __exit qla4xxx_module_exit(void)
1680 {
1681 ql4_mod_unload = 1;
1682 pci_unregister_driver(&qla4xxx_pci_driver);
1683 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1684 kmem_cache_destroy(srb_cachep);
1685 }
1686
1687 module_init(qla4xxx_module_init);
1688 module_exit(qla4xxx_module_exit);
1689
1690 MODULE_AUTHOR("QLogic Corporation");
1691 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1692 MODULE_LICENSE("GPL");
1693 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);