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Linux 2.6.34-rc3
[pohmelfs.git] / drivers / scsi / qla4xxx / ql4_os.c
blob83c8b5e4fc8b45856a37f2a58fb5727a4a740fa7
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 #define QL4_DEF_QDEPTH 32
50
51 /*
52 * SCSI host template entry points
53 */
54 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
55
56 /*
57 * iSCSI template entry points
58 */
59 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
60 enum iscsi_tgt_dscvr type, uint32_t enable,
61 struct sockaddr *dst_addr);
62 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
63 enum iscsi_param param, char *buf);
64 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
65 enum iscsi_param param, char *buf);
66 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
67 enum iscsi_host_param param, char *buf);
68 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
69 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
70
71 /*
72 * SCSI host template entry points
73 */
74 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
75 void (*done) (struct scsi_cmnd *));
76 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
77 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
78 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
79 static int qla4xxx_slave_alloc(struct scsi_device *device);
80 static int qla4xxx_slave_configure(struct scsi_device *device);
81 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
82 static void qla4xxx_scan_start(struct Scsi_Host *shost);
83
84 static struct scsi_host_template qla4xxx_driver_template = {
85 .module = THIS_MODULE,
86 .name = DRIVER_NAME,
87 .proc_name = DRIVER_NAME,
88 .queuecommand = qla4xxx_queuecommand,
89
90 .eh_device_reset_handler = qla4xxx_eh_device_reset,
91 .eh_target_reset_handler = qla4xxx_eh_target_reset,
92 .eh_host_reset_handler = qla4xxx_eh_host_reset,
93 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
94
95 .slave_configure = qla4xxx_slave_configure,
96 .slave_alloc = qla4xxx_slave_alloc,
97 .slave_destroy = qla4xxx_slave_destroy,
98
99 .scan_finished = iscsi_scan_finished,
100 .scan_start = qla4xxx_scan_start,
101
102 .this_id = -1,
103 .cmd_per_lun = 3,
104 .use_clustering = ENABLE_CLUSTERING,
105 .sg_tablesize = SG_ALL,
106
107 .max_sectors = 0xFFFF,
108 };
109
110 static struct iscsi_transport qla4xxx_iscsi_transport = {
111 .owner = THIS_MODULE,
112 .name = DRIVER_NAME,
113 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
114 CAP_DATA_PATH_OFFLOAD,
115 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
116 ISCSI_TARGET_NAME | ISCSI_TPGT,
117 .host_param_mask = ISCSI_HOST_HWADDRESS |
118 ISCSI_HOST_IPADDRESS |
119 ISCSI_HOST_INITIATOR_NAME,
120 .tgt_dscvr = qla4xxx_tgt_dscvr,
121 .get_conn_param = qla4xxx_conn_get_param,
122 .get_session_param = qla4xxx_sess_get_param,
123 .get_host_param = qla4xxx_host_get_param,
124 .session_recovery_timedout = qla4xxx_recovery_timedout,
125 };
126
127 static struct scsi_transport_template *qla4xxx_scsi_transport;
128
129 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
130 {
131 struct iscsi_cls_session *session;
132 struct ddb_entry *ddb_entry;
133
134 session = starget_to_session(scsi_target(sc->device));
135 ddb_entry = session->dd_data;
136
137 /* if we are not logged in then the LLD is going to clean up the cmd */
138 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
139 return BLK_EH_RESET_TIMER;
140 else
141 return BLK_EH_NOT_HANDLED;
142 }
143
144 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
145 {
146 struct ddb_entry *ddb_entry = session->dd_data;
147 struct scsi_qla_host *ha = ddb_entry->ha;
148
149 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
150 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
151
152 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count "
153 "of (%d) secs exhausted, marking device DEAD.\n",
154 ha->host_no, __func__, ddb_entry->fw_ddb_index,
155 ha->port_down_retry_count));
156
157 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc "
158 "flags = 0x%lx\n",
159 ha->host_no, __func__, ha->dpc_flags));
160 queue_work(ha->dpc_thread, &ha->dpc_work);
161 }
162 }
163
164 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
165 enum iscsi_host_param param, char *buf)
166 {
167 struct scsi_qla_host *ha = to_qla_host(shost);
168 int len;
169
170 switch (param) {
171 case ISCSI_HOST_PARAM_HWADDRESS:
172 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
173 break;
174 case ISCSI_HOST_PARAM_IPADDRESS:
175 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
176 ha->ip_address[1], ha->ip_address[2],
177 ha->ip_address[3]);
178 break;
179 case ISCSI_HOST_PARAM_INITIATOR_NAME:
180 len = sprintf(buf, "%s\n", ha->name_string);
181 break;
182 default:
183 return -ENOSYS;
184 }
185
186 return len;
187 }
188
189 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
190 enum iscsi_param param, char *buf)
191 {
192 struct ddb_entry *ddb_entry = sess->dd_data;
193 int len;
194
195 switch (param) {
196 case ISCSI_PARAM_TARGET_NAME:
197 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
198 ddb_entry->iscsi_name);
199 break;
200 case ISCSI_PARAM_TPGT:
201 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
202 break;
203 default:
204 return -ENOSYS;
205 }
206
207 return len;
208 }
209
210 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
211 enum iscsi_param param, char *buf)
212 {
213 struct iscsi_cls_session *session;
214 struct ddb_entry *ddb_entry;
215 int len;
216
217 session = iscsi_dev_to_session(conn->dev.parent);
218 ddb_entry = session->dd_data;
219
220 switch (param) {
221 case ISCSI_PARAM_CONN_PORT:
222 len = sprintf(buf, "%hu\n", ddb_entry->port);
223 break;
224 case ISCSI_PARAM_CONN_ADDRESS:
225 /* TODO: what are the ipv6 bits */
226 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
227 break;
228 default:
229 return -ENOSYS;
230 }
231
232 return len;
233 }
234
235 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
236 enum iscsi_tgt_dscvr type, uint32_t enable,
237 struct sockaddr *dst_addr)
238 {
239 struct scsi_qla_host *ha;
240 struct sockaddr_in *addr;
241 struct sockaddr_in6 *addr6;
242 int ret = 0;
243
244 ha = (struct scsi_qla_host *) shost->hostdata;
245
246 switch (type) {
247 case ISCSI_TGT_DSCVR_SEND_TARGETS:
248 if (dst_addr->sa_family == AF_INET) {
249 addr = (struct sockaddr_in *)dst_addr;
250 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
251 addr->sin_port) != QLA_SUCCESS)
252 ret = -EIO;
253 } else if (dst_addr->sa_family == AF_INET6) {
254 /*
255 * TODO: fix qla4xxx_send_tgts
256 */
257 addr6 = (struct sockaddr_in6 *)dst_addr;
258 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
259 addr6->sin6_port) != QLA_SUCCESS)
260 ret = -EIO;
261 } else
262 ret = -ENOSYS;
263 break;
264 default:
265 ret = -ENOSYS;
266 }
267 return ret;
268 }
269
270 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
271 {
272 if (!ddb_entry->sess)
273 return;
274
275 if (ddb_entry->conn) {
276 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
277 iscsi_remove_session(ddb_entry->sess);
278 }
279 iscsi_free_session(ddb_entry->sess);
280 }
281
282 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
283 {
284 int err;
285
286 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
287 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
288 if (err) {
289 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
290 return err;
291 }
292
293 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
294 if (!ddb_entry->conn) {
295 iscsi_remove_session(ddb_entry->sess);
296 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
297 return -ENOMEM;
298 }
299
300 /* finally ready to go */
301 iscsi_unblock_session(ddb_entry->sess);
302 return 0;
303 }
304
305 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
306 {
307 struct ddb_entry *ddb_entry;
308 struct iscsi_cls_session *sess;
309
310 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
311 sizeof(struct ddb_entry));
312 if (!sess)
313 return NULL;
314
315 ddb_entry = sess->dd_data;
316 memset(ddb_entry, 0, sizeof(*ddb_entry));
317 ddb_entry->ha = ha;
318 ddb_entry->sess = sess;
319 return ddb_entry;
320 }
321
322 static void qla4xxx_scan_start(struct Scsi_Host *shost)
323 {
324 struct scsi_qla_host *ha = shost_priv(shost);
325 struct ddb_entry *ddb_entry, *ddbtemp;
326
327 /* finish setup of sessions that were already setup in firmware */
328 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
329 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
330 qla4xxx_add_sess(ddb_entry);
331 }
332 }
333
334 /*
335 * Timer routines
336 */
337
338 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
339 unsigned long interval)
340 {
341 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
342 __func__, ha->host->host_no));
343 init_timer(&ha->timer);
344 ha->timer.expires = jiffies + interval * HZ;
345 ha->timer.data = (unsigned long)ha;
346 ha->timer.function = (void (*)(unsigned long))func;
347 add_timer(&ha->timer);
348 ha->timer_active = 1;
349 }
350
351 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
352 {
353 del_timer_sync(&ha->timer);
354 ha->timer_active = 0;
355 }
356
357 /***
358 * qla4xxx_mark_device_missing - mark a device as missing.
359 * @ha: Pointer to host adapter structure.
360 * @ddb_entry: Pointer to device database entry
361 *
362 * This routine marks a device missing and resets the relogin retry count.
363 **/
364 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
365 struct ddb_entry *ddb_entry)
366 {
367 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
368 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
369 ha->host_no, ddb_entry->bus, ddb_entry->target,
370 ddb_entry->fw_ddb_index));
371 iscsi_block_session(ddb_entry->sess);
372 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
373 }
374
375 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
376 struct ddb_entry *ddb_entry,
377 struct scsi_cmnd *cmd,
378 void (*done)(struct scsi_cmnd *))
379 {
380 struct srb *srb;
381
382 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
383 if (!srb)
384 return srb;
385
386 atomic_set(&srb->ref_count, 1);
387 srb->ha = ha;
388 srb->ddb = ddb_entry;
389 srb->cmd = cmd;
390 srb->flags = 0;
391 cmd->SCp.ptr = (void *)srb;
392 cmd->scsi_done = done;
393
394 return srb;
395 }
396
397 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
398 {
399 struct scsi_cmnd *cmd = srb->cmd;
400
401 if (srb->flags & SRB_DMA_VALID) {
402 scsi_dma_unmap(cmd);
403 srb->flags &= ~SRB_DMA_VALID;
404 }
405 cmd->SCp.ptr = NULL;
406 }
407
408 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
409 {
410 struct scsi_cmnd *cmd = srb->cmd;
411
412 qla4xxx_srb_free_dma(ha, srb);
413
414 mempool_free(srb, ha->srb_mempool);
415
416 cmd->scsi_done(cmd);
417 }
418
419 /**
420 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
421 * @cmd: Pointer to Linux's SCSI command structure
422 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
423 * that the command has been processed.
424 *
425 * Remarks:
426 * This routine is invoked by Linux to send a SCSI command to the driver.
427 * The mid-level driver tries to ensure that queuecommand never gets
428 * invoked concurrently with itself or the interrupt handler (although
429 * the interrupt handler may call this routine as part of request-
430 * completion handling). Unfortunely, it sometimes calls the scheduler
431 * in interrupt context which is a big NO! NO!.
432 **/
433 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
434 void (*done)(struct scsi_cmnd *))
435 {
436 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
437 struct ddb_entry *ddb_entry = cmd->device->hostdata;
438 struct iscsi_cls_session *sess = ddb_entry->sess;
439 struct srb *srb;
440 int rval;
441
442 if (!sess) {
443 cmd->result = DID_IMM_RETRY << 16;
444 goto qc_fail_command;
445 }
446
447 rval = iscsi_session_chkready(sess);
448 if (rval) {
449 cmd->result = rval;
450 goto qc_fail_command;
451 }
452
453 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
454 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
455 cmd->result = DID_NO_CONNECT << 16;
456 goto qc_fail_command;
457 }
458 return SCSI_MLQUEUE_TARGET_BUSY;
459 }
460
461 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
462 goto qc_host_busy;
463
464 spin_unlock_irq(ha->host->host_lock);
465
466 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
467 if (!srb)
468 goto qc_host_busy_lock;
469
470 rval = qla4xxx_send_command_to_isp(ha, srb);
471 if (rval != QLA_SUCCESS)
472 goto qc_host_busy_free_sp;
473
474 spin_lock_irq(ha->host->host_lock);
475 return 0;
476
477 qc_host_busy_free_sp:
478 qla4xxx_srb_free_dma(ha, srb);
479 mempool_free(srb, ha->srb_mempool);
480
481 qc_host_busy_lock:
482 spin_lock_irq(ha->host->host_lock);
483
484 qc_host_busy:
485 return SCSI_MLQUEUE_HOST_BUSY;
486
487 qc_fail_command:
488 done(cmd);
489
490 return 0;
491 }
492
493 /**
494 * qla4xxx_mem_free - frees memory allocated to adapter
495 * @ha: Pointer to host adapter structure.
496 *
497 * Frees memory previously allocated by qla4xxx_mem_alloc
498 **/
499 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
500 {
501 if (ha->queues)
502 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
503 ha->queues_dma);
504
505 ha->queues_len = 0;
506 ha->queues = NULL;
507 ha->queues_dma = 0;
508 ha->request_ring = NULL;
509 ha->request_dma = 0;
510 ha->response_ring = NULL;
511 ha->response_dma = 0;
512 ha->shadow_regs = NULL;
513 ha->shadow_regs_dma = 0;
514
515 /* Free srb pool. */
516 if (ha->srb_mempool)
517 mempool_destroy(ha->srb_mempool);
518
519 ha->srb_mempool = NULL;
520
521 /* release io space registers */
522 if (ha->reg)
523 iounmap(ha->reg);
524 pci_release_regions(ha->pdev);
525 }
526
527 /**
528 * qla4xxx_mem_alloc - allocates memory for use by adapter.
529 * @ha: Pointer to host adapter structure
530 *
531 * Allocates DMA memory for request and response queues. Also allocates memory
532 * for srbs.
533 **/
534 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
535 {
536 unsigned long align;
537
538 /* Allocate contiguous block of DMA memory for queues. */
539 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
540 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
541 sizeof(struct shadow_regs) +
542 MEM_ALIGN_VALUE +
543 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
544 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
545 &ha->queues_dma, GFP_KERNEL);
546 if (ha->queues == NULL) {
547 dev_warn(&ha->pdev->dev,
548 "Memory Allocation failed - queues.\n");
549
550 goto mem_alloc_error_exit;
551 }
552 memset(ha->queues, 0, ha->queues_len);
553
554 /*
555 * As per RISC alignment requirements -- the bus-address must be a
556 * multiple of the request-ring size (in bytes).
557 */
558 align = 0;
559 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
560 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
561 (MEM_ALIGN_VALUE - 1));
562
563 /* Update request and response queue pointers. */
564 ha->request_dma = ha->queues_dma + align;
565 ha->request_ring = (struct queue_entry *) (ha->queues + align);
566 ha->response_dma = ha->queues_dma + align +
567 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
568 ha->response_ring = (struct queue_entry *) (ha->queues + align +
569 (REQUEST_QUEUE_DEPTH *
570 QUEUE_SIZE));
571 ha->shadow_regs_dma = ha->queues_dma + align +
572 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
573 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
574 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
575 (REQUEST_QUEUE_DEPTH *
576 QUEUE_SIZE) +
577 (RESPONSE_QUEUE_DEPTH *
578 QUEUE_SIZE));
579
580 /* Allocate memory for srb pool. */
581 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
582 mempool_free_slab, srb_cachep);
583 if (ha->srb_mempool == NULL) {
584 dev_warn(&ha->pdev->dev,
585 "Memory Allocation failed - SRB Pool.\n");
586
587 goto mem_alloc_error_exit;
588 }
589
590 return QLA_SUCCESS;
591
592 mem_alloc_error_exit:
593 qla4xxx_mem_free(ha);
594 return QLA_ERROR;
595 }
596
597 /**
598 * qla4xxx_timer - checks every second for work to do.
599 * @ha: Pointer to host adapter structure.
600 **/
601 static void qla4xxx_timer(struct scsi_qla_host *ha)
602 {
603 struct ddb_entry *ddb_entry, *dtemp;
604 int start_dpc = 0;
605
606 /* Search for relogin's to time-out and port down retry. */
607 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
608 /* Count down time between sending relogins */
609 if (adapter_up(ha) &&
610 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
611 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
612 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
613 INVALID_ENTRY) {
614 if (atomic_read(&ddb_entry->retry_relogin_timer)
615 == 0) {
616 atomic_set(&ddb_entry->
617 retry_relogin_timer,
618 INVALID_ENTRY);
619 set_bit(DPC_RELOGIN_DEVICE,
620 &ha->dpc_flags);
621 set_bit(DF_RELOGIN, &ddb_entry->flags);
622 DEBUG2(printk("scsi%ld: %s: index [%d]"
623 " login device\n",
624 ha->host_no, __func__,
625 ddb_entry->fw_ddb_index));
626 } else
627 atomic_dec(&ddb_entry->
628 retry_relogin_timer);
629 }
630 }
631
632 /* Wait for relogin to timeout */
633 if (atomic_read(&ddb_entry->relogin_timer) &&
634 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
635 /*
636 * If the relogin times out and the device is
637 * still NOT ONLINE then try and relogin again.
638 */
639 if (atomic_read(&ddb_entry->state) !=
640 DDB_STATE_ONLINE &&
641 ddb_entry->fw_ddb_device_state ==
642 DDB_DS_SESSION_FAILED) {
643 /* Reset retry relogin timer */
644 atomic_inc(&ddb_entry->relogin_retry_count);
645 DEBUG2(printk("scsi%ld: index[%d] relogin"
646 " timed out-retrying"
647 " relogin (%d)\n",
648 ha->host_no,
649 ddb_entry->fw_ddb_index,
650 atomic_read(&ddb_entry->
651 relogin_retry_count))
652 );
653 start_dpc++;
654 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
655 "initate relogin after"
656 " %d seconds\n",
657 ha->host_no, ddb_entry->bus,
658 ddb_entry->target,
659 ddb_entry->fw_ddb_index,
660 ddb_entry->default_time2wait + 4)
661 );
662
663 atomic_set(&ddb_entry->retry_relogin_timer,
664 ddb_entry->default_time2wait + 4);
665 }
666 }
667 }
668
669 /* Check for heartbeat interval. */
670 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
671 ha->heartbeat_interval != 0) {
672 ha->seconds_since_last_heartbeat++;
673 if (ha->seconds_since_last_heartbeat >
674 ha->heartbeat_interval + 2)
675 set_bit(DPC_RESET_HA, &ha->dpc_flags);
676 }
677
678
679 /* Wakeup the dpc routine for this adapter, if needed. */
680 if ((start_dpc ||
681 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
682 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
683 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
684 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
685 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
686 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
687 test_bit(DPC_AEN, &ha->dpc_flags)) &&
688 ha->dpc_thread) {
689 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
690 " - dpc flags = 0x%lx\n",
691 ha->host_no, __func__, ha->dpc_flags));
692 queue_work(ha->dpc_thread, &ha->dpc_work);
693 }
694
695 /* Reschedule timer thread to call us back in one second */
696 mod_timer(&ha->timer, jiffies + HZ);
697
698 DEBUG2(ha->seconds_since_last_intr++);
699 }
700
701 /**
702 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
703 * @ha: Pointer to host adapter structure.
704 *
705 * This routine stalls the driver until all outstanding commands are returned.
706 * Caller must release the Hardware Lock prior to calling this routine.
707 **/
708 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
709 {
710 uint32_t index = 0;
711 int stat = QLA_SUCCESS;
712 unsigned long flags;
713 struct scsi_cmnd *cmd;
714 int wait_cnt = WAIT_CMD_TOV; /*
715 * Initialized for 30 seconds as we
716 * expect all commands to retuned
717 * ASAP.
718 */
719
720 while (wait_cnt) {
721 spin_lock_irqsave(&ha->hardware_lock, flags);
722 /* Find a command that hasn't completed. */
723 for (index = 0; index < ha->host->can_queue; index++) {
724 cmd = scsi_host_find_tag(ha->host, index);
725 if (cmd != NULL)
726 break;
727 }
728 spin_unlock_irqrestore(&ha->hardware_lock, flags);
729
730 /* If No Commands are pending, wait is complete */
731 if (index == ha->host->can_queue) {
732 break;
733 }
734
735 /* If we timed out on waiting for commands to come back
736 * return ERROR.
737 */
738 wait_cnt--;
739 if (wait_cnt == 0)
740 stat = QLA_ERROR;
741 else {
742 msleep(1000);
743 }
744 } /* End of While (wait_cnt) */
745
746 return stat;
747 }
748
749 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
750 {
751 uint32_t ctrl_status;
752 unsigned long flags = 0;
753
754 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
755
756 spin_lock_irqsave(&ha->hardware_lock, flags);
757
758 /*
759 * If the SCSI Reset Interrupt bit is set, clear it.
760 * Otherwise, the Soft Reset won't work.
761 */
762 ctrl_status = readw(&ha->reg->ctrl_status);
763 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
764 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
765
766 /* Issue Soft Reset */
767 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
768 readl(&ha->reg->ctrl_status);
769
770 spin_unlock_irqrestore(&ha->hardware_lock, flags);
771 }
772
773 /**
774 * qla4xxx_soft_reset - performs soft reset.
775 * @ha: Pointer to host adapter structure.
776 **/
777 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
778 {
779 uint32_t max_wait_time;
780 unsigned long flags = 0;
781 int status = QLA_ERROR;
782 uint32_t ctrl_status;
783
784 qla4xxx_hw_reset(ha);
785
786 /* Wait until the Network Reset Intr bit is cleared */
787 max_wait_time = RESET_INTR_TOV;
788 do {
789 spin_lock_irqsave(&ha->hardware_lock, flags);
790 ctrl_status = readw(&ha->reg->ctrl_status);
791 spin_unlock_irqrestore(&ha->hardware_lock, flags);
792
793 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
794 break;
795
796 msleep(1000);
797 } while ((--max_wait_time));
798
799 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
800 DEBUG2(printk(KERN_WARNING
801 "scsi%ld: Network Reset Intr not cleared by "
802 "Network function, clearing it now!\n",
803 ha->host_no));
804 spin_lock_irqsave(&ha->hardware_lock, flags);
805 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
806 readl(&ha->reg->ctrl_status);
807 spin_unlock_irqrestore(&ha->hardware_lock, flags);
808 }
809
810 /* Wait until the firmware tells us the Soft Reset is done */
811 max_wait_time = SOFT_RESET_TOV;
812 do {
813 spin_lock_irqsave(&ha->hardware_lock, flags);
814 ctrl_status = readw(&ha->reg->ctrl_status);
815 spin_unlock_irqrestore(&ha->hardware_lock, flags);
816
817 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
818 status = QLA_SUCCESS;
819 break;
820 }
821
822 msleep(1000);
823 } while ((--max_wait_time));
824
825 /*
826 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
827 * after the soft reset has taken place.
828 */
829 spin_lock_irqsave(&ha->hardware_lock, flags);
830 ctrl_status = readw(&ha->reg->ctrl_status);
831 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
832 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
833 readl(&ha->reg->ctrl_status);
834 }
835 spin_unlock_irqrestore(&ha->hardware_lock, flags);
836
837 /* If soft reset fails then most probably the bios on other
838 * function is also enabled.
839 * Since the initialization is sequential the other fn
840 * wont be able to acknowledge the soft reset.
841 * Issue a force soft reset to workaround this scenario.
842 */
843 if (max_wait_time == 0) {
844 /* Issue Force Soft Reset */
845 spin_lock_irqsave(&ha->hardware_lock, flags);
846 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
847 readl(&ha->reg->ctrl_status);
848 spin_unlock_irqrestore(&ha->hardware_lock, flags);
849 /* Wait until the firmware tells us the Soft Reset is done */
850 max_wait_time = SOFT_RESET_TOV;
851 do {
852 spin_lock_irqsave(&ha->hardware_lock, flags);
853 ctrl_status = readw(&ha->reg->ctrl_status);
854 spin_unlock_irqrestore(&ha->hardware_lock, flags);
855
856 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
857 status = QLA_SUCCESS;
858 break;
859 }
860
861 msleep(1000);
862 } while ((--max_wait_time));
863 }
864
865 return status;
866 }
867
868 /**
869 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
870 * @ha: Pointer to host adapter structure.
871 *
872 * This routine is called just prior to a HARD RESET to return all
873 * outstanding commands back to the Operating System.
874 * Caller should make sure that the following locks are released
875 * before this calling routine: Hardware lock, and io_request_lock.
876 **/
877 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
878 {
879 struct srb *srb;
880 int i;
881 unsigned long flags;
882
883 spin_lock_irqsave(&ha->hardware_lock, flags);
884 for (i = 0; i < ha->host->can_queue; i++) {
885 srb = qla4xxx_del_from_active_array(ha, i);
886 if (srb != NULL) {
887 srb->cmd->result = DID_RESET << 16;
888 qla4xxx_srb_compl(ha, srb);
889 }
890 }
891 spin_unlock_irqrestore(&ha->hardware_lock, flags);
892
893 }
894
895 /**
896 * qla4xxx_recover_adapter - recovers adapter after a fatal error
897 * @ha: Pointer to host adapter structure.
898 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
899 *
900 * renew_ddb_list value can be 0=preserve ddb list, 1=destroy and rebuild
901 * ddb list.
902 **/
903 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
904 uint8_t renew_ddb_list)
905 {
906 int status;
907
908 /* Stall incoming I/O until we are done */
909 clear_bit(AF_ONLINE, &ha->flags);
910
911 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
912 __func__));
913
914 /* Wait for outstanding commands to complete.
915 * Stalls the driver for max 30 secs
916 */
917 status = qla4xxx_cmd_wait(ha);
918
919 qla4xxx_disable_intrs(ha);
920
921 /* Flush any pending ddb changed AENs */
922 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
923
924 qla4xxx_flush_active_srbs(ha);
925
926 /* Reset the firmware. If successful, function
927 * returns with ISP interrupts enabled.
928 */
929 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
930 ha->host_no, __func__));
931 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
932 status = qla4xxx_soft_reset(ha);
933 else
934 status = QLA_ERROR;
935
936 /* Flush any pending ddb changed AENs */
937 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
938
939 /* Re-initialize firmware. If successful, function returns
940 * with ISP interrupts enabled */
941 if (status == QLA_SUCCESS) {
942 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
943 ha->host_no, __func__));
944
945 /* If successful, AF_ONLINE flag set in
946 * qla4xxx_initialize_adapter */
947 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
948 }
949
950 /* Failed adapter initialization?
951 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
952 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
953 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
954 /* Adapter initialization failed, see if we can retry
955 * resetting the ha */
956 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
957 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
958 DEBUG2(printk("scsi%ld: recover adapter - retrying "
959 "(%d) more times\n", ha->host_no,
960 ha->retry_reset_ha_cnt));
961 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
962 status = QLA_ERROR;
963 } else {
964 if (ha->retry_reset_ha_cnt > 0) {
965 /* Schedule another Reset HA--DPC will retry */
966 ha->retry_reset_ha_cnt--;
967 DEBUG2(printk("scsi%ld: recover adapter - "
968 "retry remaining %d\n",
969 ha->host_no,
970 ha->retry_reset_ha_cnt));
971 status = QLA_ERROR;
972 }
973
974 if (ha->retry_reset_ha_cnt == 0) {
975 /* Recover adapter retries have been exhausted.
976 * Adapter DEAD */
977 DEBUG2(printk("scsi%ld: recover adapter "
978 "failed - board disabled\n",
979 ha->host_no));
980 qla4xxx_flush_active_srbs(ha);
981 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
982 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
983 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
984 &ha->dpc_flags);
985 status = QLA_ERROR;
986 }
987 }
988 } else {
989 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
990 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
991 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
992 }
993
994 ha->adapter_error_count++;
995
996 if (status == QLA_SUCCESS)
997 qla4xxx_enable_intrs(ha);
998
999 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
1000 return status;
1001 }
1002
1003 /**
1004 * qla4xxx_do_dpc - dpc routine
1005 * @data: in our case pointer to adapter structure
1006 *
1007 * This routine is a task that is schedule by the interrupt handler
1008 * to perform the background processing for interrupts. We put it
1009 * on a task queue that is consumed whenever the scheduler runs; that's
1010 * so you can do anything (i.e. put the process to sleep etc). In fact,
1011 * the mid-level tries to sleep when it reaches the driver threshold
1012 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1013 **/
1014 static void qla4xxx_do_dpc(struct work_struct *work)
1015 {
1016 struct scsi_qla_host *ha =
1017 container_of(work, struct scsi_qla_host, dpc_work);
1018 struct ddb_entry *ddb_entry, *dtemp;
1019 int status = QLA_ERROR;
1020
1021 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1022 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1023 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1024 readw(&ha->reg->ctrl_status)));
1025
1026 /* Initialization not yet finished. Don't do anything yet. */
1027 if (!test_bit(AF_INIT_DONE, &ha->flags))
1028 return;
1029
1030 if (adapter_up(ha) ||
1031 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1032 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1033 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1034 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1035 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1036 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1037
1038 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1039 uint8_t wait_time = RESET_INTR_TOV;
1040
1041 while ((readw(&ha->reg->ctrl_status) &
1042 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1043 if (--wait_time == 0)
1044 break;
1045 msleep(1000);
1046 }
1047 if (wait_time == 0)
1048 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1049 "bit not cleared-- resetting\n",
1050 ha->host_no, __func__));
1051 qla4xxx_flush_active_srbs(ha);
1052 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1053 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1054 status = qla4xxx_initialize_adapter(ha,
1055 PRESERVE_DDB_LIST);
1056 }
1057 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1058 if (status == QLA_SUCCESS)
1059 qla4xxx_enable_intrs(ha);
1060 }
1061 }
1062
1063 /* ---- process AEN? --- */
1064 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1065 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1066
1067 /* ---- Get DHCP IP Address? --- */
1068 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1069 qla4xxx_get_dhcp_ip_address(ha);
1070
1071 /* ---- relogin device? --- */
1072 if (adapter_up(ha) &&
1073 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1074 list_for_each_entry_safe(ddb_entry, dtemp,
1075 &ha->ddb_list, list) {
1076 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1077 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1078 qla4xxx_relogin_device(ha, ddb_entry);
1079
1080 /*
1081 * If mbx cmd times out there is no point
1082 * in continuing further.
1083 * With large no of targets this can hang
1084 * the system.
1085 */
1086 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1087 printk(KERN_WARNING "scsi%ld: %s: "
1088 "need to reset hba\n",
1089 ha->host_no, __func__);
1090 break;
1091 }
1092 }
1093 }
1094 }
1095
1096 /**
1097 * qla4xxx_free_adapter - release the adapter
1098 * @ha: pointer to adapter structure
1099 **/
1100 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1101 {
1102
1103 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1104 /* Turn-off interrupts on the card. */
1105 qla4xxx_disable_intrs(ha);
1106 }
1107
1108 /* Kill the kernel thread for this host */
1109 if (ha->dpc_thread)
1110 destroy_workqueue(ha->dpc_thread);
1111
1112 /* Issue Soft Reset to put firmware in unknown state */
1113 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1114 qla4xxx_hw_reset(ha);
1115
1116 /* Remove timer thread, if present */
1117 if (ha->timer_active)
1118 qla4xxx_stop_timer(ha);
1119
1120 /* Detach interrupts */
1121 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1122 free_irq(ha->pdev->irq, ha);
1123
1124 /* free extra memory */
1125 qla4xxx_mem_free(ha);
1126
1127 pci_disable_device(ha->pdev);
1128
1129 }
1130
1131 /***
1132 * qla4xxx_iospace_config - maps registers
1133 * @ha: pointer to adapter structure
1134 *
1135 * This routines maps HBA's registers from the pci address space
1136 * into the kernel virtual address space for memory mapped i/o.
1137 **/
1138 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1139 {
1140 unsigned long pio, pio_len, pio_flags;
1141 unsigned long mmio, mmio_len, mmio_flags;
1142
1143 pio = pci_resource_start(ha->pdev, 0);
1144 pio_len = pci_resource_len(ha->pdev, 0);
1145 pio_flags = pci_resource_flags(ha->pdev, 0);
1146 if (pio_flags & IORESOURCE_IO) {
1147 if (pio_len < MIN_IOBASE_LEN) {
1148 dev_warn(&ha->pdev->dev,
1149 "Invalid PCI I/O region size\n");
1150 pio = 0;
1151 }
1152 } else {
1153 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1154 pio = 0;
1155 }
1156
1157 /* Use MMIO operations for all accesses. */
1158 mmio = pci_resource_start(ha->pdev, 1);
1159 mmio_len = pci_resource_len(ha->pdev, 1);
1160 mmio_flags = pci_resource_flags(ha->pdev, 1);
1161
1162 if (!(mmio_flags & IORESOURCE_MEM)) {
1163 dev_err(&ha->pdev->dev,
1164 "region #0 not an MMIO resource, aborting\n");
1165
1166 goto iospace_error_exit;
1167 }
1168 if (mmio_len < MIN_IOBASE_LEN) {
1169 dev_err(&ha->pdev->dev,
1170 "Invalid PCI mem region size, aborting\n");
1171 goto iospace_error_exit;
1172 }
1173
1174 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1175 dev_warn(&ha->pdev->dev,
1176 "Failed to reserve PIO/MMIO regions\n");
1177
1178 goto iospace_error_exit;
1179 }
1180
1181 ha->pio_address = pio;
1182 ha->pio_length = pio_len;
1183 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1184 if (!ha->reg) {
1185 dev_err(&ha->pdev->dev,
1186 "cannot remap MMIO, aborting\n");
1187
1188 goto iospace_error_exit;
1189 }
1190
1191 return 0;
1192
1193 iospace_error_exit:
1194 return -ENOMEM;
1195 }
1196
1197 /**
1198 * qla4xxx_probe_adapter - callback function to probe HBA
1199 * @pdev: pointer to pci_dev structure
1200 * @pci_device_id: pointer to pci_device entry
1201 *
1202 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1203 * It returns zero if successful. It also initializes all data necessary for
1204 * the driver.
1205 **/
1206 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1207 const struct pci_device_id *ent)
1208 {
1209 int ret = -ENODEV, status;
1210 struct Scsi_Host *host;
1211 struct scsi_qla_host *ha;
1212 uint8_t init_retry_count = 0;
1213 char buf[34];
1214
1215 if (pci_enable_device(pdev))
1216 return -1;
1217
1218 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1219 if (host == NULL) {
1220 printk(KERN_WARNING
1221 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1222 goto probe_disable_device;
1223 }
1224
1225 /* Clear our data area */
1226 ha = (struct scsi_qla_host *) host->hostdata;
1227 memset(ha, 0, sizeof(*ha));
1228
1229 /* Save the information from PCI BIOS. */
1230 ha->pdev = pdev;
1231 ha->host = host;
1232 ha->host_no = host->host_no;
1233
1234 /* Configure PCI I/O space. */
1235 ret = qla4xxx_iospace_config(ha);
1236 if (ret)
1237 goto probe_failed;
1238
1239 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1240 pdev->device, pdev->irq, ha->reg);
1241
1242 qla4xxx_config_dma_addressing(ha);
1243
1244 /* Initialize lists and spinlocks. */
1245 INIT_LIST_HEAD(&ha->ddb_list);
1246 INIT_LIST_HEAD(&ha->free_srb_q);
1247
1248 mutex_init(&ha->mbox_sem);
1249
1250 spin_lock_init(&ha->hardware_lock);
1251
1252 /* Allocate dma buffers */
1253 if (qla4xxx_mem_alloc(ha)) {
1254 dev_warn(&ha->pdev->dev,
1255 "[ERROR] Failed to allocate memory for adapter\n");
1256
1257 ret = -ENOMEM;
1258 goto probe_failed;
1259 }
1260
1261 /*
1262 * Initialize the Host adapter request/response queues and
1263 * firmware
1264 * NOTE: interrupts enabled upon successful completion
1265 */
1266 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1267 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1268 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1269 "(%d)\n", __func__, init_retry_count));
1270 qla4xxx_soft_reset(ha);
1271 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1272 }
1273 if (status == QLA_ERROR) {
1274 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1275
1276 ret = -ENODEV;
1277 goto probe_failed;
1278 }
1279
1280 host->cmd_per_lun = 3;
1281 host->max_channel = 0;
1282 host->max_lun = MAX_LUNS - 1;
1283 host->max_id = MAX_TARGETS;
1284 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1285 host->can_queue = MAX_SRBS ;
1286 host->transportt = qla4xxx_scsi_transport;
1287
1288 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1289 if (ret) {
1290 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1291 goto probe_failed;
1292 }
1293
1294 /* Startup the kernel thread for this host adapter. */
1295 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1296 "qla4xxx_dpc\n", __func__));
1297 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1298 ha->dpc_thread = create_singlethread_workqueue(buf);
1299 if (!ha->dpc_thread) {
1300 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1301 ret = -ENODEV;
1302 goto probe_failed;
1303 }
1304 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1305
1306 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1307 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1308 if (ret) {
1309 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1310 " already in use.\n", pdev->irq);
1311 goto probe_failed;
1312 }
1313 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1314 host->irq = pdev->irq;
1315 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1316
1317 qla4xxx_enable_intrs(ha);
1318
1319 /* Start timer thread. */
1320 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1321
1322 set_bit(AF_INIT_DONE, &ha->flags);
1323
1324 pci_set_drvdata(pdev, ha);
1325
1326 ret = scsi_add_host(host, &pdev->dev);
1327 if (ret)
1328 goto probe_failed;
1329
1330 printk(KERN_INFO
1331 " QLogic iSCSI HBA Driver version: %s\n"
1332 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1333 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1334 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1335 ha->patch_number, ha->build_number);
1336 scsi_scan_host(host);
1337 return 0;
1338
1339 probe_failed:
1340 qla4xxx_free_adapter(ha);
1341 scsi_host_put(ha->host);
1342
1343 probe_disable_device:
1344 pci_disable_device(pdev);
1345
1346 return ret;
1347 }
1348
1349 /**
1350 * qla4xxx_remove_adapter - calback function to remove adapter.
1351 * @pci_dev: PCI device pointer
1352 **/
1353 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1354 {
1355 struct scsi_qla_host *ha;
1356
1357 ha = pci_get_drvdata(pdev);
1358
1359 qla4xxx_disable_intrs(ha);
1360
1361 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1362 ssleep(1);
1363
1364 /* remove devs from iscsi_sessions to scsi_devices */
1365 qla4xxx_free_ddb_list(ha);
1366
1367 scsi_remove_host(ha->host);
1368
1369 qla4xxx_free_adapter(ha);
1370
1371 scsi_host_put(ha->host);
1372
1373 pci_set_drvdata(pdev, NULL);
1374 }
1375
1376 /**
1377 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1378 * @ha: HA context
1379 *
1380 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1381 * supported addressing method.
1382 */
1383 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1384 {
1385 int retval;
1386
1387 /* Update our PCI device dma_mask for full 64 bit mask */
1388 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1389 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1390 dev_dbg(&ha->pdev->dev,
1391 "Failed to set 64 bit PCI consistent mask; "
1392 "using 32 bit.\n");
1393 retval = pci_set_consistent_dma_mask(ha->pdev,
1394 DMA_BIT_MASK(32));
1395 }
1396 } else
1397 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1398 }
1399
1400 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1401 {
1402 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1403 struct ddb_entry *ddb = sess->dd_data;
1404
1405 sdev->hostdata = ddb;
1406 sdev->tagged_supported = 1;
1407 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1408 return 0;
1409 }
1410
1411 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1412 {
1413 sdev->tagged_supported = 1;
1414 return 0;
1415 }
1416
1417 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1418 {
1419 scsi_deactivate_tcq(sdev, 1);
1420 }
1421
1422 /**
1423 * qla4xxx_del_from_active_array - returns an active srb
1424 * @ha: Pointer to host adapter structure.
1425 * @index: index into the active_array
1426 *
1427 * This routine removes and returns the srb at the specified index
1428 **/
1429 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1430 {
1431 struct srb *srb = NULL;
1432 struct scsi_cmnd *cmd;
1433
1434 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1435 return srb;
1436
1437 if (!(srb = (struct srb *)cmd->host_scribble))
1438 return srb;
1439
1440 /* update counters */
1441 if (srb->flags & SRB_DMA_VALID) {
1442 ha->req_q_count += srb->iocb_cnt;
1443 ha->iocb_cnt -= srb->iocb_cnt;
1444 if (srb->cmd)
1445 srb->cmd->host_scribble = NULL;
1446 }
1447 return srb;
1448 }
1449
1450 /**
1451 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1452 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1453 * @cmd: Scsi Command to wait on.
1454 *
1455 * This routine waits for the command to be returned by the Firmware
1456 * for some max time.
1457 **/
1458 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1459 struct scsi_cmnd *cmd)
1460 {
1461 int done = 0;
1462 struct srb *rp;
1463 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1464
1465 do {
1466 /* Checking to see if its returned to OS */
1467 rp = (struct srb *) cmd->SCp.ptr;
1468 if (rp == NULL) {
1469 done++;
1470 break;
1471 }
1472
1473 msleep(2000);
1474 } while (max_wait_time--);
1475
1476 return done;
1477 }
1478
1479 /**
1480 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1481 * @ha: Pointer to host adapter structure
1482 **/
1483 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1484 {
1485 unsigned long wait_online;
1486
1487 wait_online = jiffies + (30 * HZ);
1488 while (time_before(jiffies, wait_online)) {
1489
1490 if (adapter_up(ha))
1491 return QLA_SUCCESS;
1492 else if (ha->retry_reset_ha_cnt == 0)
1493 return QLA_ERROR;
1494
1495 msleep(2000);
1496 }
1497
1498 return QLA_ERROR;
1499 }
1500
1501 /**
1502 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1503 * @ha: pointer to HBA
1504 * @t: target id
1505 * @l: lun id
1506 *
1507 * This function waits for all outstanding commands to a lun to complete. It
1508 * returns 0 if all pending commands are returned and 1 otherwise.
1509 **/
1510 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1511 struct scsi_target *stgt,
1512 struct scsi_device *sdev)
1513 {
1514 int cnt;
1515 int status = 0;
1516 struct scsi_cmnd *cmd;
1517
1518 /*
1519 * Waiting for all commands for the designated target or dev
1520 * in the active array
1521 */
1522 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1523 cmd = scsi_host_find_tag(ha->host, cnt);
1524 if (cmd && stgt == scsi_target(cmd->device) &&
1525 (!sdev || sdev == cmd->device)) {
1526 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1527 status++;
1528 break;
1529 }
1530 }
1531 }
1532 return status;
1533 }
1534
1535 /**
1536 * qla4xxx_eh_device_reset - callback for target reset.
1537 * @cmd: Pointer to Linux's SCSI command structure
1538 *
1539 * This routine is called by the Linux OS to reset all luns on the
1540 * specified target.
1541 **/
1542 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1543 {
1544 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1545 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1546 int ret = FAILED, stat;
1547
1548 if (!ddb_entry)
1549 return ret;
1550
1551 dev_info(&ha->pdev->dev,
1552 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1553 cmd->device->channel, cmd->device->id, cmd->device->lun);
1554
1555 DEBUG2(printk(KERN_INFO
1556 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1557 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1558 cmd, jiffies, cmd->request->timeout / HZ,
1559 ha->dpc_flags, cmd->result, cmd->allowed));
1560
1561 /* FIXME: wait for hba to go online */
1562 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1563 if (stat != QLA_SUCCESS) {
1564 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1565 goto eh_dev_reset_done;
1566 }
1567
1568 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
1569 cmd->device)) {
1570 dev_info(&ha->pdev->dev,
1571 "DEVICE RESET FAILED - waiting for "
1572 "commands.\n");
1573 goto eh_dev_reset_done;
1574 }
1575
1576 /* Send marker. */
1577 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
1578 MM_LUN_RESET) != QLA_SUCCESS)
1579 goto eh_dev_reset_done;
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_target_reset - callback for target reset.
1595 * @cmd: Pointer to Linux's SCSI command structure
1596 *
1597 * This routine is called by the Linux OS to reset the target.
1598 **/
1599 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
1600 {
1601 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1602 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1603 int stat;
1604
1605 if (!ddb_entry)
1606 return FAILED;
1607
1608 starget_printk(KERN_INFO, scsi_target(cmd->device),
1609 "WARM TARGET RESET ISSUED.\n");
1610
1611 DEBUG2(printk(KERN_INFO
1612 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
1613 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
1614 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
1615 ha->dpc_flags, cmd->result, cmd->allowed));
1616
1617 stat = qla4xxx_reset_target(ha, ddb_entry);
1618 if (stat != QLA_SUCCESS) {
1619 starget_printk(KERN_INFO, scsi_target(cmd->device),
1620 "WARM TARGET RESET FAILED.\n");
1621 return FAILED;
1622 }
1623
1624 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
1625 NULL)) {
1626 starget_printk(KERN_INFO, scsi_target(cmd->device),
1627 "WARM TARGET DEVICE RESET FAILED - "
1628 "waiting for commands.\n");
1629 return FAILED;
1630 }
1631
1632 /* Send marker. */
1633 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
1634 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
1635 starget_printk(KERN_INFO, scsi_target(cmd->device),
1636 "WARM TARGET DEVICE RESET FAILED - "
1637 "marker iocb failed.\n");
1638 return FAILED;
1639 }
1640
1641 starget_printk(KERN_INFO, scsi_target(cmd->device),
1642 "WARM TARGET RESET SUCCEEDED.\n");
1643 return SUCCESS;
1644 }
1645
1646 /**
1647 * qla4xxx_eh_host_reset - kernel callback
1648 * @cmd: Pointer to Linux's SCSI command structure
1649 *
1650 * This routine is invoked by the Linux kernel to perform fatal error
1651 * recovery on the specified adapter.
1652 **/
1653 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1654 {
1655 int return_status = FAILED;
1656 struct scsi_qla_host *ha;
1657
1658 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1659
1660 dev_info(&ha->pdev->dev,
1661 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
1662 cmd->device->channel, cmd->device->id, cmd->device->lun);
1663
1664 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1665 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1666 "DEAD.\n", ha->host_no, cmd->device->channel,
1667 __func__));
1668
1669 return FAILED;
1670 }
1671
1672 /* make sure the dpc thread is stopped while we reset the hba */
1673 clear_bit(AF_ONLINE, &ha->flags);
1674 flush_workqueue(ha->dpc_thread);
1675
1676 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS)
1677 return_status = SUCCESS;
1678
1679 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1680 return_status == FAILED ? "FAILED" : "SUCCEDED");
1681
1682 return return_status;
1683 }
1684
1685
1686 static struct pci_device_id qla4xxx_pci_tbl[] = {
1687 {
1688 .vendor = PCI_VENDOR_ID_QLOGIC,
1689 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1690 .subvendor = PCI_ANY_ID,
1691 .subdevice = PCI_ANY_ID,
1692 },
1693 {
1694 .vendor = PCI_VENDOR_ID_QLOGIC,
1695 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1696 .subvendor = PCI_ANY_ID,
1697 .subdevice = PCI_ANY_ID,
1698 },
1699 {
1700 .vendor = PCI_VENDOR_ID_QLOGIC,
1701 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1702 .subvendor = PCI_ANY_ID,
1703 .subdevice = PCI_ANY_ID,
1704 },
1705 {0, 0},
1706 };
1707 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1708
1709 static struct pci_driver qla4xxx_pci_driver = {
1710 .name = DRIVER_NAME,
1711 .id_table = qla4xxx_pci_tbl,
1712 .probe = qla4xxx_probe_adapter,
1713 .remove = qla4xxx_remove_adapter,
1714 };
1715
1716 static int __init qla4xxx_module_init(void)
1717 {
1718 int ret;
1719
1720 /* Allocate cache for SRBs. */
1721 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1722 SLAB_HWCACHE_ALIGN, NULL);
1723 if (srb_cachep == NULL) {
1724 printk(KERN_ERR
1725 "%s: Unable to allocate SRB cache..."
1726 "Failing load!\n", DRIVER_NAME);
1727 ret = -ENOMEM;
1728 goto no_srp_cache;
1729 }
1730
1731 /* Derive version string. */
1732 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1733 if (ql4xextended_error_logging)
1734 strcat(qla4xxx_version_str, "-debug");
1735
1736 qla4xxx_scsi_transport =
1737 iscsi_register_transport(&qla4xxx_iscsi_transport);
1738 if (!qla4xxx_scsi_transport){
1739 ret = -ENODEV;
1740 goto release_srb_cache;
1741 }
1742
1743 ret = pci_register_driver(&qla4xxx_pci_driver);
1744 if (ret)
1745 goto unregister_transport;
1746
1747 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1748 return 0;
1749
1750 unregister_transport:
1751 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1752 release_srb_cache:
1753 kmem_cache_destroy(srb_cachep);
1754 no_srp_cache:
1755 return ret;
1756 }
1757
1758 static void __exit qla4xxx_module_exit(void)
1759 {
1760 ql4_mod_unload = 1;
1761 pci_unregister_driver(&qla4xxx_pci_driver);
1762 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1763 kmem_cache_destroy(srb_cachep);
1764 }
1765
1766 module_init(qla4xxx_module_init);
1767 module_exit(qla4xxx_module_exit);
1768
1769 MODULE_AUTHOR("QLogic Corporation");
1770 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1771 MODULE_LICENSE("GPL");
1772 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);