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[SCSI] qla4xxx: grab hardware_lock in eh_abort before accessing srb
[linux-2.6/linux-mips.git] / drivers / scsi / qla4xxx / ql4_os.c
blobf1c58eb26ba241f0e33b1f06e510a679b0991613
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 #include <linux/slab.h>
9
10 #include <scsi/scsi_tcq.h>
11 #include <scsi/scsicam.h>
12
13 #include "ql4_def.h"
14 #include "ql4_version.h"
15 #include "ql4_glbl.h"
16 #include "ql4_dbg.h"
17 #include "ql4_inline.h"
18
19 /*
20 * Driver version
21 */
22 static char qla4xxx_version_str[40];
23
24 /*
25 * SRB allocation cache
26 */
27 static struct kmem_cache *srb_cachep;
28
29 /*
30 * Module parameter information and variables
31 */
32 int ql4xdiscoverywait = 60;
33 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
35
36 int ql4xdontresethba = 0;
37 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);
38 MODULE_PARM_DESC(ql4xdontresethba,
39 "Don't reset the HBA for driver recovery \n"
40 " 0 - It will reset HBA (Default)\n"
41 " 1 - It will NOT reset HBA");
42
43 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
44 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);
45 MODULE_PARM_DESC(ql4xextended_error_logging,
46 "Option to enable extended error logging, "
47 "Default is 0 - no logging, 1 - debug logging");
48
49 int ql4xenablemsix = 1;
50 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
51 MODULE_PARM_DESC(ql4xenablemsix,
52 "Set to enable MSI or MSI-X interrupt mechanism.\n"
53 " 0 = enable INTx interrupt mechanism.\n"
54 " 1 = enable MSI-X interrupt mechanism (Default).\n"
55 " 2 = enable MSI interrupt mechanism.");
56
57 #define QL4_DEF_QDEPTH 32
58
59 /*
60 * SCSI host template entry points
61 */
62 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
63
64 /*
65 * iSCSI template entry points
66 */
67 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
68 enum iscsi_tgt_dscvr type, uint32_t enable,
69 struct sockaddr *dst_addr);
70 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
71 enum iscsi_param param, char *buf);
72 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
73 enum iscsi_param param, char *buf);
74 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
75 enum iscsi_host_param param, char *buf);
76 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
77 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
78
79 /*
80 * SCSI host template entry points
81 */
82 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
83 void (*done) (struct scsi_cmnd *));
84 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
85 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
86 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
87 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
88 static int qla4xxx_slave_alloc(struct scsi_device *device);
89 static int qla4xxx_slave_configure(struct scsi_device *device);
90 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
91 static void qla4xxx_scan_start(struct Scsi_Host *shost);
92
93 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
94 QLA82XX_LEGACY_INTR_CONFIG;
95
96 static struct scsi_host_template qla4xxx_driver_template = {
97 .module = THIS_MODULE,
98 .name = DRIVER_NAME,
99 .proc_name = DRIVER_NAME,
100 .queuecommand = qla4xxx_queuecommand,
101
102 .eh_abort_handler = qla4xxx_eh_abort,
103 .eh_device_reset_handler = qla4xxx_eh_device_reset,
104 .eh_target_reset_handler = qla4xxx_eh_target_reset,
105 .eh_host_reset_handler = qla4xxx_eh_host_reset,
106 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
107
108 .slave_configure = qla4xxx_slave_configure,
109 .slave_alloc = qla4xxx_slave_alloc,
110 .slave_destroy = qla4xxx_slave_destroy,
111
112 .scan_finished = iscsi_scan_finished,
113 .scan_start = qla4xxx_scan_start,
114
115 .this_id = -1,
116 .cmd_per_lun = 3,
117 .use_clustering = ENABLE_CLUSTERING,
118 .sg_tablesize = SG_ALL,
119
120 .max_sectors = 0xFFFF,
121 };
122
123 static struct iscsi_transport qla4xxx_iscsi_transport = {
124 .owner = THIS_MODULE,
125 .name = DRIVER_NAME,
126 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
127 CAP_DATA_PATH_OFFLOAD,
128 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
129 ISCSI_TARGET_NAME | ISCSI_TPGT |
130 ISCSI_TARGET_ALIAS,
131 .host_param_mask = ISCSI_HOST_HWADDRESS |
132 ISCSI_HOST_IPADDRESS |
133 ISCSI_HOST_INITIATOR_NAME,
134 .tgt_dscvr = qla4xxx_tgt_dscvr,
135 .get_conn_param = qla4xxx_conn_get_param,
136 .get_session_param = qla4xxx_sess_get_param,
137 .get_host_param = qla4xxx_host_get_param,
138 .session_recovery_timedout = qla4xxx_recovery_timedout,
139 };
140
141 static struct scsi_transport_template *qla4xxx_scsi_transport;
142
143 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
144 {
145 struct iscsi_cls_session *session;
146 struct ddb_entry *ddb_entry;
147
148 session = starget_to_session(scsi_target(sc->device));
149 ddb_entry = session->dd_data;
150
151 /* if we are not logged in then the LLD is going to clean up the cmd */
152 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
153 return BLK_EH_RESET_TIMER;
154 else
155 return BLK_EH_NOT_HANDLED;
156 }
157
158 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
159 {
160 struct ddb_entry *ddb_entry = session->dd_data;
161 struct scsi_qla_host *ha = ddb_entry->ha;
162
163 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
164 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
165
166 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout "
167 "of (%d) secs exhausted, marking device DEAD.\n",
168 ha->host_no, __func__, ddb_entry->fw_ddb_index,
169 QL4_SESS_RECOVERY_TMO));
170 }
171 }
172
173 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
174 enum iscsi_host_param param, char *buf)
175 {
176 struct scsi_qla_host *ha = to_qla_host(shost);
177 int len;
178
179 switch (param) {
180 case ISCSI_HOST_PARAM_HWADDRESS:
181 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
182 break;
183 case ISCSI_HOST_PARAM_IPADDRESS:
184 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
185 ha->ip_address[1], ha->ip_address[2],
186 ha->ip_address[3]);
187 break;
188 case ISCSI_HOST_PARAM_INITIATOR_NAME:
189 len = sprintf(buf, "%s\n", ha->name_string);
190 break;
191 default:
192 return -ENOSYS;
193 }
194
195 return len;
196 }
197
198 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
199 enum iscsi_param param, char *buf)
200 {
201 struct ddb_entry *ddb_entry = sess->dd_data;
202 int len;
203
204 switch (param) {
205 case ISCSI_PARAM_TARGET_NAME:
206 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
207 ddb_entry->iscsi_name);
208 break;
209 case ISCSI_PARAM_TPGT:
210 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
211 break;
212 case ISCSI_PARAM_TARGET_ALIAS:
213 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
214 ddb_entry->iscsi_alias);
215 break;
216 default:
217 return -ENOSYS;
218 }
219
220 return len;
221 }
222
223 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
224 enum iscsi_param param, char *buf)
225 {
226 struct iscsi_cls_session *session;
227 struct ddb_entry *ddb_entry;
228 int len;
229
230 session = iscsi_dev_to_session(conn->dev.parent);
231 ddb_entry = session->dd_data;
232
233 switch (param) {
234 case ISCSI_PARAM_CONN_PORT:
235 len = sprintf(buf, "%hu\n", ddb_entry->port);
236 break;
237 case ISCSI_PARAM_CONN_ADDRESS:
238 /* TODO: what are the ipv6 bits */
239 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
240 break;
241 default:
242 return -ENOSYS;
243 }
244
245 return len;
246 }
247
248 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
249 enum iscsi_tgt_dscvr type, uint32_t enable,
250 struct sockaddr *dst_addr)
251 {
252 struct scsi_qla_host *ha;
253 struct sockaddr_in *addr;
254 struct sockaddr_in6 *addr6;
255 int ret = 0;
256
257 ha = (struct scsi_qla_host *) shost->hostdata;
258
259 switch (type) {
260 case ISCSI_TGT_DSCVR_SEND_TARGETS:
261 if (dst_addr->sa_family == AF_INET) {
262 addr = (struct sockaddr_in *)dst_addr;
263 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
264 addr->sin_port) != QLA_SUCCESS)
265 ret = -EIO;
266 } else if (dst_addr->sa_family == AF_INET6) {
267 /*
268 * TODO: fix qla4xxx_send_tgts
269 */
270 addr6 = (struct sockaddr_in6 *)dst_addr;
271 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
272 addr6->sin6_port) != QLA_SUCCESS)
273 ret = -EIO;
274 } else
275 ret = -ENOSYS;
276 break;
277 default:
278 ret = -ENOSYS;
279 }
280 return ret;
281 }
282
283 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
284 {
285 if (!ddb_entry->sess)
286 return;
287
288 if (ddb_entry->conn) {
289 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
290 iscsi_remove_session(ddb_entry->sess);
291 }
292 iscsi_free_session(ddb_entry->sess);
293 }
294
295 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
296 {
297 int err;
298
299 ddb_entry->sess->recovery_tmo = QL4_SESS_RECOVERY_TMO;
300
301 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
302 if (err) {
303 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
304 return err;
305 }
306
307 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
308 if (!ddb_entry->conn) {
309 iscsi_remove_session(ddb_entry->sess);
310 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
311 return -ENOMEM;
312 }
313
314 /* finally ready to go */
315 iscsi_unblock_session(ddb_entry->sess);
316 return 0;
317 }
318
319 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
320 {
321 struct ddb_entry *ddb_entry;
322 struct iscsi_cls_session *sess;
323
324 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
325 sizeof(struct ddb_entry));
326 if (!sess)
327 return NULL;
328
329 ddb_entry = sess->dd_data;
330 memset(ddb_entry, 0, sizeof(*ddb_entry));
331 ddb_entry->ha = ha;
332 ddb_entry->sess = sess;
333 return ddb_entry;
334 }
335
336 static void qla4xxx_scan_start(struct Scsi_Host *shost)
337 {
338 struct scsi_qla_host *ha = shost_priv(shost);
339 struct ddb_entry *ddb_entry, *ddbtemp;
340
341 /* finish setup of sessions that were already setup in firmware */
342 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
343 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
344 qla4xxx_add_sess(ddb_entry);
345 }
346 }
347
348 /*
349 * Timer routines
350 */
351
352 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
353 unsigned long interval)
354 {
355 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
356 __func__, ha->host->host_no));
357 init_timer(&ha->timer);
358 ha->timer.expires = jiffies + interval * HZ;
359 ha->timer.data = (unsigned long)ha;
360 ha->timer.function = (void (*)(unsigned long))func;
361 add_timer(&ha->timer);
362 ha->timer_active = 1;
363 }
364
365 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
366 {
367 del_timer_sync(&ha->timer);
368 ha->timer_active = 0;
369 }
370
371 /***
372 * qla4xxx_mark_device_missing - mark a device as missing.
373 * @ha: Pointer to host adapter structure.
374 * @ddb_entry: Pointer to device database entry
375 *
376 * This routine marks a device missing and close connection.
377 **/
378 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
379 struct ddb_entry *ddb_entry)
380 {
381 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
382 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
383 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
384 ha->host_no, ddb_entry->fw_ddb_index));
385 } else
386 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
387 ddb_entry->fw_ddb_index))
388
389 iscsi_block_session(ddb_entry->sess);
390 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
391 }
392
393 /**
394 * qla4xxx_mark_all_devices_missing - mark all devices as missing.
395 * @ha: Pointer to host adapter structure.
396 *
397 * This routine marks a device missing and resets the relogin retry count.
398 **/
399 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
400 {
401 struct ddb_entry *ddb_entry, *ddbtemp;
402 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
403 qla4xxx_mark_device_missing(ha, ddb_entry);
404 }
405 }
406
407 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
408 struct ddb_entry *ddb_entry,
409 struct scsi_cmnd *cmd,
410 void (*done)(struct scsi_cmnd *))
411 {
412 struct srb *srb;
413
414 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
415 if (!srb)
416 return srb;
417
418 kref_init(&srb->srb_ref);
419 srb->ha = ha;
420 srb->ddb = ddb_entry;
421 srb->cmd = cmd;
422 srb->flags = 0;
423 CMD_SP(cmd) = (void *)srb;
424 cmd->scsi_done = done;
425
426 return srb;
427 }
428
429 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
430 {
431 struct scsi_cmnd *cmd = srb->cmd;
432
433 if (srb->flags & SRB_DMA_VALID) {
434 scsi_dma_unmap(cmd);
435 srb->flags &= ~SRB_DMA_VALID;
436 }
437 CMD_SP(cmd) = NULL;
438 }
439
440 void qla4xxx_srb_compl(struct kref *ref)
441 {
442 struct srb *srb = container_of(ref, struct srb, srb_ref);
443 struct scsi_cmnd *cmd = srb->cmd;
444 struct scsi_qla_host *ha = srb->ha;
445
446 qla4xxx_srb_free_dma(ha, srb);
447
448 mempool_free(srb, ha->srb_mempool);
449
450 cmd->scsi_done(cmd);
451 }
452
453 /**
454 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
455 * @cmd: Pointer to Linux's SCSI command structure
456 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
457 * that the command has been processed.
458 *
459 * Remarks:
460 * This routine is invoked by Linux to send a SCSI command to the driver.
461 * The mid-level driver tries to ensure that queuecommand never gets
462 * invoked concurrently with itself or the interrupt handler (although
463 * the interrupt handler may call this routine as part of request-
464 * completion handling). Unfortunely, it sometimes calls the scheduler
465 * in interrupt context which is a big NO! NO!.
466 **/
467 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
468 void (*done)(struct scsi_cmnd *))
469 {
470 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
471 struct ddb_entry *ddb_entry = cmd->device->hostdata;
472 struct iscsi_cls_session *sess = ddb_entry->sess;
473 struct srb *srb;
474 int rval;
475
476 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
477 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
478 cmd->result = DID_NO_CONNECT << 16;
479 else
480 cmd->result = DID_REQUEUE << 16;
481 goto qc_fail_command;
482 }
483
484 if (!sess) {
485 cmd->result = DID_IMM_RETRY << 16;
486 goto qc_fail_command;
487 }
488
489 rval = iscsi_session_chkready(sess);
490 if (rval) {
491 cmd->result = rval;
492 goto qc_fail_command;
493 }
494
495 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
496 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
497 cmd->result = DID_NO_CONNECT << 16;
498 goto qc_fail_command;
499 }
500 return SCSI_MLQUEUE_TARGET_BUSY;
501 }
502
503 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
504 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
505 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
506 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
507 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
508 !test_bit(AF_ONLINE, &ha->flags) ||
509 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
510 goto qc_host_busy;
511
512 spin_unlock_irq(ha->host->host_lock);
513
514 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
515 if (!srb)
516 goto qc_host_busy_lock;
517
518 rval = qla4xxx_send_command_to_isp(ha, srb);
519 if (rval != QLA_SUCCESS)
520 goto qc_host_busy_free_sp;
521
522 spin_lock_irq(ha->host->host_lock);
523 return 0;
524
525 qc_host_busy_free_sp:
526 qla4xxx_srb_free_dma(ha, srb);
527 mempool_free(srb, ha->srb_mempool);
528
529 qc_host_busy_lock:
530 spin_lock_irq(ha->host->host_lock);
531
532 qc_host_busy:
533 return SCSI_MLQUEUE_HOST_BUSY;
534
535 qc_fail_command:
536 done(cmd);
537
538 return 0;
539 }
540
541 /**
542 * qla4xxx_mem_free - frees memory allocated to adapter
543 * @ha: Pointer to host adapter structure.
544 *
545 * Frees memory previously allocated by qla4xxx_mem_alloc
546 **/
547 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
548 {
549 if (ha->queues)
550 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
551 ha->queues_dma);
552
553 ha->queues_len = 0;
554 ha->queues = NULL;
555 ha->queues_dma = 0;
556 ha->request_ring = NULL;
557 ha->request_dma = 0;
558 ha->response_ring = NULL;
559 ha->response_dma = 0;
560 ha->shadow_regs = NULL;
561 ha->shadow_regs_dma = 0;
562
563 /* Free srb pool. */
564 if (ha->srb_mempool)
565 mempool_destroy(ha->srb_mempool);
566
567 ha->srb_mempool = NULL;
568
569 /* release io space registers */
570 if (is_qla8022(ha)) {
571 if (ha->nx_pcibase)
572 iounmap(
573 (struct device_reg_82xx __iomem *)ha->nx_pcibase);
574 } else if (ha->reg)
575 iounmap(ha->reg);
576 pci_release_regions(ha->pdev);
577 }
578
579 /**
580 * qla4xxx_mem_alloc - allocates memory for use by adapter.
581 * @ha: Pointer to host adapter structure
582 *
583 * Allocates DMA memory for request and response queues. Also allocates memory
584 * for srbs.
585 **/
586 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
587 {
588 unsigned long align;
589
590 /* Allocate contiguous block of DMA memory for queues. */
591 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
592 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
593 sizeof(struct shadow_regs) +
594 MEM_ALIGN_VALUE +
595 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
596 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
597 &ha->queues_dma, GFP_KERNEL);
598 if (ha->queues == NULL) {
599 ql4_printk(KERN_WARNING, ha,
600 "Memory Allocation failed - queues.\n");
601
602 goto mem_alloc_error_exit;
603 }
604 memset(ha->queues, 0, ha->queues_len);
605
606 /*
607 * As per RISC alignment requirements -- the bus-address must be a
608 * multiple of the request-ring size (in bytes).
609 */
610 align = 0;
611 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
612 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
613 (MEM_ALIGN_VALUE - 1));
614
615 /* Update request and response queue pointers. */
616 ha->request_dma = ha->queues_dma + align;
617 ha->request_ring = (struct queue_entry *) (ha->queues + align);
618 ha->response_dma = ha->queues_dma + align +
619 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
620 ha->response_ring = (struct queue_entry *) (ha->queues + align +
621 (REQUEST_QUEUE_DEPTH *
622 QUEUE_SIZE));
623 ha->shadow_regs_dma = ha->queues_dma + align +
624 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
625 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
626 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
627 (REQUEST_QUEUE_DEPTH *
628 QUEUE_SIZE) +
629 (RESPONSE_QUEUE_DEPTH *
630 QUEUE_SIZE));
631
632 /* Allocate memory for srb pool. */
633 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
634 mempool_free_slab, srb_cachep);
635 if (ha->srb_mempool == NULL) {
636 ql4_printk(KERN_WARNING, ha,
637 "Memory Allocation failed - SRB Pool.\n");
638
639 goto mem_alloc_error_exit;
640 }
641
642 return QLA_SUCCESS;
643
644 mem_alloc_error_exit:
645 qla4xxx_mem_free(ha);
646 return QLA_ERROR;
647 }
648
649 /**
650 * qla4_8xxx_check_fw_alive - Check firmware health
651 * @ha: Pointer to host adapter structure.
652 *
653 * Context: Interrupt
654 **/
655 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
656 {
657 uint32_t fw_heartbeat_counter, halt_status;
658
659 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
660 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
661 if (fw_heartbeat_counter == 0xffffffff) {
662 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
663 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
664 ha->host_no, __func__));
665 return;
666 }
667
668 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
669 ha->seconds_since_last_heartbeat++;
670 /* FW not alive after 2 seconds */
671 if (ha->seconds_since_last_heartbeat == 2) {
672 ha->seconds_since_last_heartbeat = 0;
673 halt_status = qla4_8xxx_rd_32(ha,
674 QLA82XX_PEG_HALT_STATUS1);
675
676 /* Since we cannot change dev_state in interrupt
677 * context, set appropriate DPC flag then wakeup
678 * DPC */
679 if (halt_status & HALT_STATUS_UNRECOVERABLE)
680 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
681 else {
682 printk("scsi%ld: %s: detect abort needed!\n",
683 ha->host_no, __func__);
684 set_bit(DPC_RESET_HA, &ha->dpc_flags);
685 }
686 qla4xxx_wake_dpc(ha);
687 qla4xxx_mailbox_premature_completion(ha);
688 }
689 } else
690 ha->seconds_since_last_heartbeat = 0;
691
692 ha->fw_heartbeat_counter = fw_heartbeat_counter;
693 }
694
695 /**
696 * qla4_8xxx_watchdog - Poll dev state
697 * @ha: Pointer to host adapter structure.
698 *
699 * Context: Interrupt
700 **/
701 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
702 {
703 uint32_t dev_state;
704
705 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
706
707 /* don't poll if reset is going on */
708 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags)) {
709 if (dev_state == QLA82XX_DEV_NEED_RESET &&
710 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
711 printk("scsi%ld: %s: HW State: NEED RESET!\n",
712 ha->host_no, __func__);
713 set_bit(DPC_RESET_HA, &ha->dpc_flags);
714 qla4xxx_wake_dpc(ha);
715 qla4xxx_mailbox_premature_completion(ha);
716 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
717 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
718 printk("scsi%ld: %s: HW State: NEED QUIES!\n",
719 ha->host_no, __func__);
720 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
721 qla4xxx_wake_dpc(ha);
722 } else {
723 /* Check firmware health */
724 qla4_8xxx_check_fw_alive(ha);
725 }
726 }
727 }
728
729 /**
730 * qla4xxx_timer - checks every second for work to do.
731 * @ha: Pointer to host adapter structure.
732 **/
733 static void qla4xxx_timer(struct scsi_qla_host *ha)
734 {
735 struct ddb_entry *ddb_entry, *dtemp;
736 int start_dpc = 0;
737 uint16_t w;
738
739 /* If we are in the middle of AER/EEH processing
740 * skip any processing and reschedule the timer
741 */
742 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
743 mod_timer(&ha->timer, jiffies + HZ);
744 return;
745 }
746
747 /* Hardware read to trigger an EEH error during mailbox waits. */
748 if (!pci_channel_offline(ha->pdev))
749 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
750
751 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags)) {
752 DEBUG2(ql4_printk(KERN_INFO, ha, "%s exited. HBA GOING AWAY\n",
753 __func__));
754 return;
755 }
756
757 if (is_qla8022(ha)) {
758 qla4_8xxx_watchdog(ha);
759 }
760
761 /* Search for relogin's to time-out and port down retry. */
762 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
763 /* Count down time between sending relogins */
764 if (adapter_up(ha) &&
765 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
766 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
767 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
768 INVALID_ENTRY) {
769 if (atomic_read(&ddb_entry->retry_relogin_timer)
770 == 0) {
771 atomic_set(&ddb_entry->
772 retry_relogin_timer,
773 INVALID_ENTRY);
774 set_bit(DPC_RELOGIN_DEVICE,
775 &ha->dpc_flags);
776 set_bit(DF_RELOGIN, &ddb_entry->flags);
777 DEBUG2(printk("scsi%ld: %s: ddb [%d]"
778 " login device\n",
779 ha->host_no, __func__,
780 ddb_entry->fw_ddb_index));
781 } else
782 atomic_dec(&ddb_entry->
783 retry_relogin_timer);
784 }
785 }
786
787 /* Wait for relogin to timeout */
788 if (atomic_read(&ddb_entry->relogin_timer) &&
789 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
790 /*
791 * If the relogin times out and the device is
792 * still NOT ONLINE then try and relogin again.
793 */
794 if (atomic_read(&ddb_entry->state) !=
795 DDB_STATE_ONLINE &&
796 ddb_entry->fw_ddb_device_state ==
797 DDB_DS_SESSION_FAILED) {
798 /* Reset retry relogin timer */
799 atomic_inc(&ddb_entry->relogin_retry_count);
800 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
801 " timed out-retrying"
802 " relogin (%d)\n",
803 ha->host_no,
804 ddb_entry->fw_ddb_index,
805 atomic_read(&ddb_entry->
806 relogin_retry_count))
807 );
808 start_dpc++;
809 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
810 "initate relogin after"
811 " %d seconds\n",
812 ha->host_no, ddb_entry->bus,
813 ddb_entry->target,
814 ddb_entry->fw_ddb_index,
815 ddb_entry->default_time2wait + 4)
816 );
817
818 atomic_set(&ddb_entry->retry_relogin_timer,
819 ddb_entry->default_time2wait + 4);
820 }
821 }
822 }
823
824 if (!is_qla8022(ha)) {
825 /* Check for heartbeat interval. */
826 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
827 ha->heartbeat_interval != 0) {
828 ha->seconds_since_last_heartbeat++;
829 if (ha->seconds_since_last_heartbeat >
830 ha->heartbeat_interval + 2)
831 set_bit(DPC_RESET_HA, &ha->dpc_flags);
832 }
833 }
834
835 /* Wakeup the dpc routine for this adapter, if needed. */
836 if ((start_dpc ||
837 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
838 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
839 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
840 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
841 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
842 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
843 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
844 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
845 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
846 test_bit(DPC_AEN, &ha->dpc_flags)) &&
847 !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
848 ha->dpc_thread) {
849 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
850 " - dpc flags = 0x%lx\n",
851 ha->host_no, __func__, ha->dpc_flags));
852 qla4xxx_wake_dpc(ha);
853 }
854
855 /* Reschedule timer thread to call us back in one second */
856 mod_timer(&ha->timer, jiffies + HZ);
857
858 DEBUG2(ha->seconds_since_last_intr++);
859 }
860
861 /**
862 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
863 * @ha: Pointer to host adapter structure.
864 *
865 * This routine stalls the driver until all outstanding commands are returned.
866 * Caller must release the Hardware Lock prior to calling this routine.
867 **/
868 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
869 {
870 uint32_t index = 0;
871 unsigned long flags;
872 struct scsi_cmnd *cmd;
873
874 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
875
876 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
877 "complete\n", WAIT_CMD_TOV));
878
879 while (!time_after_eq(jiffies, wtime)) {
880 spin_lock_irqsave(&ha->hardware_lock, flags);
881 /* Find a command that hasn't completed. */
882 for (index = 0; index < ha->host->can_queue; index++) {
883 cmd = scsi_host_find_tag(ha->host, index);
884 if (cmd != NULL)
885 break;
886 }
887 spin_unlock_irqrestore(&ha->hardware_lock, flags);
888
889 /* If No Commands are pending, wait is complete */
890 if (index == ha->host->can_queue)
891 return QLA_SUCCESS;
892
893 msleep(1000);
894 }
895 /* If we timed out on waiting for commands to come back
896 * return ERROR. */
897 return QLA_ERROR;
898 }
899
900 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
901 {
902 uint32_t ctrl_status;
903 unsigned long flags = 0;
904
905 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
906
907 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
908 return QLA_ERROR;
909
910 spin_lock_irqsave(&ha->hardware_lock, flags);
911
912 /*
913 * If the SCSI Reset Interrupt bit is set, clear it.
914 * Otherwise, the Soft Reset won't work.
915 */
916 ctrl_status = readw(&ha->reg->ctrl_status);
917 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
918 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
919
920 /* Issue Soft Reset */
921 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
922 readl(&ha->reg->ctrl_status);
923
924 spin_unlock_irqrestore(&ha->hardware_lock, flags);
925 return QLA_SUCCESS;
926 }
927
928 /**
929 * qla4xxx_soft_reset - performs soft reset.
930 * @ha: Pointer to host adapter structure.
931 **/
932 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
933 {
934 uint32_t max_wait_time;
935 unsigned long flags = 0;
936 int status;
937 uint32_t ctrl_status;
938
939 status = qla4xxx_hw_reset(ha);
940 if (status != QLA_SUCCESS)
941 return status;
942
943 status = QLA_ERROR;
944 /* Wait until the Network Reset Intr bit is cleared */
945 max_wait_time = RESET_INTR_TOV;
946 do {
947 spin_lock_irqsave(&ha->hardware_lock, flags);
948 ctrl_status = readw(&ha->reg->ctrl_status);
949 spin_unlock_irqrestore(&ha->hardware_lock, flags);
950
951 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
952 break;
953
954 msleep(1000);
955 } while ((--max_wait_time));
956
957 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
958 DEBUG2(printk(KERN_WARNING
959 "scsi%ld: Network Reset Intr not cleared by "
960 "Network function, clearing it now!\n",
961 ha->host_no));
962 spin_lock_irqsave(&ha->hardware_lock, flags);
963 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
964 readl(&ha->reg->ctrl_status);
965 spin_unlock_irqrestore(&ha->hardware_lock, flags);
966 }
967
968 /* Wait until the firmware tells us the Soft Reset is done */
969 max_wait_time = SOFT_RESET_TOV;
970 do {
971 spin_lock_irqsave(&ha->hardware_lock, flags);
972 ctrl_status = readw(&ha->reg->ctrl_status);
973 spin_unlock_irqrestore(&ha->hardware_lock, flags);
974
975 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
976 status = QLA_SUCCESS;
977 break;
978 }
979
980 msleep(1000);
981 } while ((--max_wait_time));
982
983 /*
984 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
985 * after the soft reset has taken place.
986 */
987 spin_lock_irqsave(&ha->hardware_lock, flags);
988 ctrl_status = readw(&ha->reg->ctrl_status);
989 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
990 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
991 readl(&ha->reg->ctrl_status);
992 }
993 spin_unlock_irqrestore(&ha->hardware_lock, flags);
994
995 /* If soft reset fails then most probably the bios on other
996 * function is also enabled.
997 * Since the initialization is sequential the other fn
998 * wont be able to acknowledge the soft reset.
999 * Issue a force soft reset to workaround this scenario.
1000 */
1001 if (max_wait_time == 0) {
1002 /* Issue Force Soft Reset */
1003 spin_lock_irqsave(&ha->hardware_lock, flags);
1004 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1005 readl(&ha->reg->ctrl_status);
1006 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1007 /* Wait until the firmware tells us the Soft Reset is done */
1008 max_wait_time = SOFT_RESET_TOV;
1009 do {
1010 spin_lock_irqsave(&ha->hardware_lock, flags);
1011 ctrl_status = readw(&ha->reg->ctrl_status);
1012 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1013
1014 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1015 status = QLA_SUCCESS;
1016 break;
1017 }
1018
1019 msleep(1000);
1020 } while ((--max_wait_time));
1021 }
1022
1023 return status;
1024 }
1025
1026 /**
1027 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1028 * @ha: Pointer to host adapter structure.
1029 * @res: returned scsi status
1030 *
1031 * This routine is called just prior to a HARD RESET to return all
1032 * outstanding commands back to the Operating System.
1033 * Caller should make sure that the following locks are released
1034 * before this calling routine: Hardware lock, and io_request_lock.
1035 **/
1036 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1037 {
1038 struct srb *srb;
1039 int i;
1040 unsigned long flags;
1041
1042 spin_lock_irqsave(&ha->hardware_lock, flags);
1043 for (i = 0; i < ha->host->can_queue; i++) {
1044 srb = qla4xxx_del_from_active_array(ha, i);
1045 if (srb != NULL) {
1046 srb->cmd->result = res;
1047 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1048 }
1049 }
1050 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1051 }
1052
1053 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1054 {
1055 clear_bit(AF_ONLINE, &ha->flags);
1056
1057 /* Disable the board */
1058 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1059 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1060
1061 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1062 qla4xxx_mark_all_devices_missing(ha);
1063 clear_bit(AF_INIT_DONE, &ha->flags);
1064 }
1065
1066 /**
1067 * qla4xxx_recover_adapter - recovers adapter after a fatal error
1068 * @ha: Pointer to host adapter structure.
1069 **/
1070 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1071 {
1072 int status = QLA_ERROR;
1073 uint8_t reset_chip = 0;
1074
1075 /* Stall incoming I/O until we are done */
1076 scsi_block_requests(ha->host);
1077 clear_bit(AF_ONLINE, &ha->flags);
1078
1079 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1080
1081 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1082
1083 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1084 reset_chip = 1;
1085
1086 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1087 * do not reset adapter, jump to initialize_adapter */
1088 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1089 status = QLA_SUCCESS;
1090 goto recover_ha_init_adapter;
1091 }
1092
1093 /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1094 * from eh_host_reset or ioctl module */
1095 if (is_qla8022(ha) && !reset_chip &&
1096 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1097
1098 DEBUG2(ql4_printk(KERN_INFO, ha,
1099 "scsi%ld: %s - Performing stop_firmware...\n",
1100 ha->host_no, __func__));
1101 status = ha->isp_ops->reset_firmware(ha);
1102 if (status == QLA_SUCCESS) {
1103 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1104 qla4xxx_cmd_wait(ha);
1105 ha->isp_ops->disable_intrs(ha);
1106 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1107 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1108 } else {
1109 /* If the stop_firmware fails then
1110 * reset the entire chip */
1111 reset_chip = 1;
1112 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1113 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1114 }
1115 }
1116
1117 /* Issue full chip reset if recovering from a catastrophic error,
1118 * or if stop_firmware fails for ISP-82xx.
1119 * This is the default case for ISP-4xxx */
1120 if (!is_qla8022(ha) || reset_chip) {
1121 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1122 qla4xxx_cmd_wait(ha);
1123 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1124 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1125 DEBUG2(ql4_printk(KERN_INFO, ha,
1126 "scsi%ld: %s - Performing chip reset..\n",
1127 ha->host_no, __func__));
1128 status = ha->isp_ops->reset_chip(ha);
1129 }
1130
1131 /* Flush any pending ddb changed AENs */
1132 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1133
1134 recover_ha_init_adapter:
1135 /* Upon successful firmware/chip reset, re-initialize the adapter */
1136 if (status == QLA_SUCCESS) {
1137 /* For ISP-4xxx, force function 1 to always initialize
1138 * before function 3 to prevent both funcions from
1139 * stepping on top of the other */
1140 if (!is_qla8022(ha) && (ha->mac_index == 3))
1141 ssleep(6);
1142
1143 /* NOTE: AF_ONLINE flag set upon successful completion of
1144 * qla4xxx_initialize_adapter */
1145 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1146 }
1147
1148 /* Retry failed adapter initialization, if necessary
1149 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1150 * case to prevent ping-pong resets between functions */
1151 if (!test_bit(AF_ONLINE, &ha->flags) &&
1152 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1153 /* Adapter initialization failed, see if we can retry
1154 * resetting the ha.
1155 * Since we don't want to block the DPC for too long
1156 * with multiple resets in the same thread,
1157 * utilize DPC to retry */
1158 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1159 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1160 DEBUG2(printk("scsi%ld: recover adapter - retrying "
1161 "(%d) more times\n", ha->host_no,
1162 ha->retry_reset_ha_cnt));
1163 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1164 status = QLA_ERROR;
1165 } else {
1166 if (ha->retry_reset_ha_cnt > 0) {
1167 /* Schedule another Reset HA--DPC will retry */
1168 ha->retry_reset_ha_cnt--;
1169 DEBUG2(printk("scsi%ld: recover adapter - "
1170 "retry remaining %d\n",
1171 ha->host_no,
1172 ha->retry_reset_ha_cnt));
1173 status = QLA_ERROR;
1174 }
1175
1176 if (ha->retry_reset_ha_cnt == 0) {
1177 /* Recover adapter retries have been exhausted.
1178 * Adapter DEAD */
1179 DEBUG2(printk("scsi%ld: recover adapter "
1180 "failed - board disabled\n",
1181 ha->host_no));
1182 qla4xxx_dead_adapter_cleanup(ha);
1183 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1184 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1185 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1186 &ha->dpc_flags);
1187 status = QLA_ERROR;
1188 }
1189 }
1190 } else {
1191 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1192 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1193 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1194 }
1195
1196 ha->adapter_error_count++;
1197
1198 if (test_bit(AF_ONLINE, &ha->flags))
1199 ha->isp_ops->enable_intrs(ha);
1200
1201 scsi_unblock_requests(ha->host);
1202
1203 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1204 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1205 status == QLA_ERROR ? "FAILED" : "SUCCEDED"));
1206
1207 return status;
1208 }
1209
1210 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1211 {
1212 if (ha->dpc_thread &&
1213 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1214 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1215 queue_work(ha->dpc_thread, &ha->dpc_work);
1216 }
1217 }
1218
1219 /**
1220 * qla4xxx_do_dpc - dpc routine
1221 * @data: in our case pointer to adapter structure
1222 *
1223 * This routine is a task that is schedule by the interrupt handler
1224 * to perform the background processing for interrupts. We put it
1225 * on a task queue that is consumed whenever the scheduler runs; that's
1226 * so you can do anything (i.e. put the process to sleep etc). In fact,
1227 * the mid-level tries to sleep when it reaches the driver threshold
1228 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1229 **/
1230 static void qla4xxx_do_dpc(struct work_struct *work)
1231 {
1232 struct scsi_qla_host *ha =
1233 container_of(work, struct scsi_qla_host, dpc_work);
1234 struct ddb_entry *ddb_entry, *dtemp;
1235 int status = QLA_ERROR;
1236
1237 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1238 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1239 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1240
1241 /* Initialization not yet finished. Don't do anything yet. */
1242 if (!test_bit(AF_INIT_DONE, &ha->flags))
1243 goto do_dpc_exit;
1244
1245 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1246 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1247 ha->host_no, __func__, ha->flags));
1248 goto do_dpc_exit;
1249 }
1250
1251 /* HBA is in the process of being permanently disabled.
1252 * Don't process anything */
1253 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1254 return;
1255
1256 if (is_qla8022(ha)) {
1257 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1258 qla4_8xxx_idc_lock(ha);
1259 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1260 QLA82XX_DEV_FAILED);
1261 qla4_8xxx_idc_unlock(ha);
1262 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1263 qla4_8xxx_device_state_handler(ha);
1264 }
1265 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1266 qla4_8xxx_need_qsnt_handler(ha);
1267 }
1268 }
1269
1270 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1271 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1272 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1273 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1274 if (ql4xdontresethba) {
1275 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1276 ha->host_no, __func__));
1277 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1278 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1279 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1280 goto dpc_post_reset_ha;
1281 }
1282 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1283 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1284 qla4xxx_recover_adapter(ha);
1285
1286 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1287 uint8_t wait_time = RESET_INTR_TOV;
1288
1289 while ((readw(&ha->reg->ctrl_status) &
1290 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1291 if (--wait_time == 0)
1292 break;
1293 msleep(1000);
1294 }
1295 if (wait_time == 0)
1296 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1297 "bit not cleared-- resetting\n",
1298 ha->host_no, __func__));
1299 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1300 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1301 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1302 status = qla4xxx_recover_adapter(ha);
1303 }
1304 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1305 if (status == QLA_SUCCESS)
1306 ha->isp_ops->enable_intrs(ha);
1307 }
1308 }
1309
1310 dpc_post_reset_ha:
1311 /* ---- process AEN? --- */
1312 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1313 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1314
1315 /* ---- Get DHCP IP Address? --- */
1316 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1317 qla4xxx_get_dhcp_ip_address(ha);
1318
1319 /* ---- link change? --- */
1320 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1321 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1322 /* ---- link down? --- */
1323 list_for_each_entry_safe(ddb_entry, dtemp,
1324 &ha->ddb_list, list) {
1325 if (atomic_read(&ddb_entry->state) ==
1326 DDB_STATE_ONLINE)
1327 qla4xxx_mark_device_missing(ha,
1328 ddb_entry);
1329 }
1330 } else {
1331 /* ---- link up? --- *
1332 * F/W will auto login to all devices ONLY ONCE after
1333 * link up during driver initialization and runtime
1334 * fatal error recovery. Therefore, the driver must
1335 * manually relogin to devices when recovering from
1336 * connection failures, logouts, expired KATO, etc. */
1337
1338 list_for_each_entry_safe(ddb_entry, dtemp,
1339 &ha->ddb_list, list) {
1340 if ((atomic_read(&ddb_entry->state) ==
1341 DDB_STATE_MISSING) ||
1342 (atomic_read(&ddb_entry->state) ==
1343 DDB_STATE_DEAD)) {
1344 if (ddb_entry->fw_ddb_device_state ==
1345 DDB_DS_SESSION_ACTIVE) {
1346 atomic_set(&ddb_entry->state,
1347 DDB_STATE_ONLINE);
1348 ql4_printk(KERN_INFO, ha,
1349 "scsi%ld: %s: ddb[%d]"
1350 " marked ONLINE\n",
1351 ha->host_no, __func__,
1352 ddb_entry->fw_ddb_index);
1353
1354 iscsi_unblock_session(
1355 ddb_entry->sess);
1356 } else
1357 qla4xxx_relogin_device(
1358 ha, ddb_entry);
1359 }
1360
1361 }
1362 }
1363 }
1364
1365 /* ---- relogin device? --- */
1366 if (adapter_up(ha) &&
1367 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1368 list_for_each_entry_safe(ddb_entry, dtemp,
1369 &ha->ddb_list, list) {
1370 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1371 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1372 qla4xxx_relogin_device(ha, ddb_entry);
1373
1374 /*
1375 * If mbx cmd times out there is no point
1376 * in continuing further.
1377 * With large no of targets this can hang
1378 * the system.
1379 */
1380 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1381 printk(KERN_WARNING "scsi%ld: %s: "
1382 "need to reset hba\n",
1383 ha->host_no, __func__);
1384 break;
1385 }
1386 }
1387 }
1388
1389 do_dpc_exit:
1390 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1391 }
1392
1393 /**
1394 * qla4xxx_free_adapter - release the adapter
1395 * @ha: pointer to adapter structure
1396 **/
1397 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1398 {
1399
1400 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1401 /* Turn-off interrupts on the card. */
1402 ha->isp_ops->disable_intrs(ha);
1403 }
1404
1405 /* Remove timer thread, if present */
1406 if (ha->timer_active)
1407 qla4xxx_stop_timer(ha);
1408
1409 /* Kill the kernel thread for this host */
1410 if (ha->dpc_thread)
1411 destroy_workqueue(ha->dpc_thread);
1412
1413 /* Put firmware in known state */
1414 ha->isp_ops->reset_firmware(ha);
1415
1416 if (is_qla8022(ha)) {
1417 qla4_8xxx_idc_lock(ha);
1418 qla4_8xxx_clear_drv_active(ha);
1419 qla4_8xxx_idc_unlock(ha);
1420 }
1421
1422 /* Detach interrupts */
1423 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1424 qla4xxx_free_irqs(ha);
1425
1426 /* free extra memory */
1427 qla4xxx_mem_free(ha);
1428 }
1429
1430 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1431 {
1432 int status = 0;
1433 uint8_t revision_id;
1434 unsigned long mem_base, mem_len, db_base, db_len;
1435 struct pci_dev *pdev = ha->pdev;
1436
1437 status = pci_request_regions(pdev, DRIVER_NAME);
1438 if (status) {
1439 printk(KERN_WARNING
1440 "scsi(%ld) Failed to reserve PIO regions (%s) "
1441 "status=%d\n", ha->host_no, pci_name(pdev), status);
1442 goto iospace_error_exit;
1443 }
1444
1445 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1446 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1447 __func__, revision_id));
1448 ha->revision_id = revision_id;
1449
1450 /* remap phys address */
1451 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1452 mem_len = pci_resource_len(pdev, 0);
1453 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1454 __func__, mem_base, mem_len));
1455
1456 /* mapping of pcibase pointer */
1457 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1458 if (!ha->nx_pcibase) {
1459 printk(KERN_ERR
1460 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1461 pci_release_regions(ha->pdev);
1462 goto iospace_error_exit;
1463 }
1464
1465 /* Mapping of IO base pointer, door bell read and write pointer */
1466
1467 /* mapping of IO base pointer */
1468 ha->qla4_8xxx_reg =
1469 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1470 0xbc000 + (ha->pdev->devfn << 11));
1471
1472 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1473 db_len = pci_resource_len(pdev, 4);
1474
1475 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1476 QLA82XX_CAM_RAM_DB2);
1477
1478 return 0;
1479 iospace_error_exit:
1480 return -ENOMEM;
1481 }
1482
1483 /***
1484 * qla4xxx_iospace_config - maps registers
1485 * @ha: pointer to adapter structure
1486 *
1487 * This routines maps HBA's registers from the pci address space
1488 * into the kernel virtual address space for memory mapped i/o.
1489 **/
1490 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1491 {
1492 unsigned long pio, pio_len, pio_flags;
1493 unsigned long mmio, mmio_len, mmio_flags;
1494
1495 pio = pci_resource_start(ha->pdev, 0);
1496 pio_len = pci_resource_len(ha->pdev, 0);
1497 pio_flags = pci_resource_flags(ha->pdev, 0);
1498 if (pio_flags & IORESOURCE_IO) {
1499 if (pio_len < MIN_IOBASE_LEN) {
1500 ql4_printk(KERN_WARNING, ha,
1501 "Invalid PCI I/O region size\n");
1502 pio = 0;
1503 }
1504 } else {
1505 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1506 pio = 0;
1507 }
1508
1509 /* Use MMIO operations for all accesses. */
1510 mmio = pci_resource_start(ha->pdev, 1);
1511 mmio_len = pci_resource_len(ha->pdev, 1);
1512 mmio_flags = pci_resource_flags(ha->pdev, 1);
1513
1514 if (!(mmio_flags & IORESOURCE_MEM)) {
1515 ql4_printk(KERN_ERR, ha,
1516 "region #0 not an MMIO resource, aborting\n");
1517
1518 goto iospace_error_exit;
1519 }
1520
1521 if (mmio_len < MIN_IOBASE_LEN) {
1522 ql4_printk(KERN_ERR, ha,
1523 "Invalid PCI mem region size, aborting\n");
1524 goto iospace_error_exit;
1525 }
1526
1527 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1528 ql4_printk(KERN_WARNING, ha,
1529 "Failed to reserve PIO/MMIO regions\n");
1530
1531 goto iospace_error_exit;
1532 }
1533
1534 ha->pio_address = pio;
1535 ha->pio_length = pio_len;
1536 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1537 if (!ha->reg) {
1538 ql4_printk(KERN_ERR, ha,
1539 "cannot remap MMIO, aborting\n");
1540
1541 goto iospace_error_exit;
1542 }
1543
1544 return 0;
1545
1546 iospace_error_exit:
1547 return -ENOMEM;
1548 }
1549
1550 static struct isp_operations qla4xxx_isp_ops = {
1551 .iospace_config = qla4xxx_iospace_config,
1552 .pci_config = qla4xxx_pci_config,
1553 .disable_intrs = qla4xxx_disable_intrs,
1554 .enable_intrs = qla4xxx_enable_intrs,
1555 .start_firmware = qla4xxx_start_firmware,
1556 .intr_handler = qla4xxx_intr_handler,
1557 .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1558 .reset_chip = qla4xxx_soft_reset,
1559 .reset_firmware = qla4xxx_hw_reset,
1560 .queue_iocb = qla4xxx_queue_iocb,
1561 .complete_iocb = qla4xxx_complete_iocb,
1562 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out,
1563 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in,
1564 .get_sys_info = qla4xxx_get_sys_info,
1565 };
1566
1567 static struct isp_operations qla4_8xxx_isp_ops = {
1568 .iospace_config = qla4_8xxx_iospace_config,
1569 .pci_config = qla4_8xxx_pci_config,
1570 .disable_intrs = qla4_8xxx_disable_intrs,
1571 .enable_intrs = qla4_8xxx_enable_intrs,
1572 .start_firmware = qla4_8xxx_load_risc,
1573 .intr_handler = qla4_8xxx_intr_handler,
1574 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1575 .reset_chip = qla4_8xxx_isp_reset,
1576 .reset_firmware = qla4_8xxx_stop_firmware,
1577 .queue_iocb = qla4_8xxx_queue_iocb,
1578 .complete_iocb = qla4_8xxx_complete_iocb,
1579 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out,
1580 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in,
1581 .get_sys_info = qla4_8xxx_get_sys_info,
1582 };
1583
1584 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1585 {
1586 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1587 }
1588
1589 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1590 {
1591 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1592 }
1593
1594 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1595 {
1596 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1597 }
1598
1599 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1600 {
1601 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1602 }
1603
1604 /**
1605 * qla4xxx_probe_adapter - callback function to probe HBA
1606 * @pdev: pointer to pci_dev structure
1607 * @pci_device_id: pointer to pci_device entry
1608 *
1609 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1610 * It returns zero if successful. It also initializes all data necessary for
1611 * the driver.
1612 **/
1613 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1614 const struct pci_device_id *ent)
1615 {
1616 int ret = -ENODEV, status;
1617 struct Scsi_Host *host;
1618 struct scsi_qla_host *ha;
1619 uint8_t init_retry_count = 0;
1620 char buf[34];
1621 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1622
1623 if (pci_enable_device(pdev))
1624 return -1;
1625
1626 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1627 if (host == NULL) {
1628 printk(KERN_WARNING
1629 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1630 goto probe_disable_device;
1631 }
1632
1633 /* Clear our data area */
1634 ha = (struct scsi_qla_host *) host->hostdata;
1635 memset(ha, 0, sizeof(*ha));
1636
1637 /* Save the information from PCI BIOS. */
1638 ha->pdev = pdev;
1639 ha->host = host;
1640 ha->host_no = host->host_no;
1641
1642 pci_enable_pcie_error_reporting(pdev);
1643
1644 /* Setup Runtime configurable options */
1645 if (is_qla8022(ha)) {
1646 ha->isp_ops = &qla4_8xxx_isp_ops;
1647 rwlock_init(&ha->hw_lock);
1648 ha->qdr_sn_window = -1;
1649 ha->ddr_mn_window = -1;
1650 ha->curr_window = 255;
1651 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1652 nx_legacy_intr = &legacy_intr[ha->func_num];
1653 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1654 ha->nx_legacy_intr.tgt_status_reg =
1655 nx_legacy_intr->tgt_status_reg;
1656 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1657 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1658 } else {
1659 ha->isp_ops = &qla4xxx_isp_ops;
1660 }
1661
1662 /* Set EEH reset type to fundamental if required by hba */
1663 if (is_qla8022(ha))
1664 pdev->needs_freset = 1;
1665
1666 /* Configure PCI I/O space. */
1667 ret = ha->isp_ops->iospace_config(ha);
1668 if (ret)
1669 goto probe_failed_ioconfig;
1670
1671 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1672 pdev->device, pdev->irq, ha->reg);
1673
1674 qla4xxx_config_dma_addressing(ha);
1675
1676 /* Initialize lists and spinlocks. */
1677 INIT_LIST_HEAD(&ha->ddb_list);
1678 INIT_LIST_HEAD(&ha->free_srb_q);
1679
1680 mutex_init(&ha->mbox_sem);
1681 init_completion(&ha->mbx_intr_comp);
1682
1683 spin_lock_init(&ha->hardware_lock);
1684
1685 /* Allocate dma buffers */
1686 if (qla4xxx_mem_alloc(ha)) {
1687 ql4_printk(KERN_WARNING, ha,
1688 "[ERROR] Failed to allocate memory for adapter\n");
1689
1690 ret = -ENOMEM;
1691 goto probe_failed;
1692 }
1693
1694 if (is_qla8022(ha))
1695 (void) qla4_8xxx_get_flash_info(ha);
1696
1697 /*
1698 * Initialize the Host adapter request/response queues and
1699 * firmware
1700 * NOTE: interrupts enabled upon successful completion
1701 */
1702 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1703 while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1704 init_retry_count++ < MAX_INIT_RETRIES) {
1705 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1706 "(%d)\n", __func__, init_retry_count));
1707
1708 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
1709 continue;
1710
1711 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1712 }
1713
1714 if (!test_bit(AF_ONLINE, &ha->flags)) {
1715 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n");
1716
1717 ret = -ENODEV;
1718 goto probe_failed;
1719 }
1720
1721 host->cmd_per_lun = 3;
1722 host->max_channel = 0;
1723 host->max_lun = MAX_LUNS - 1;
1724 host->max_id = MAX_TARGETS;
1725 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1726 host->can_queue = MAX_SRBS ;
1727 host->transportt = qla4xxx_scsi_transport;
1728
1729 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1730 if (ret) {
1731 ql4_printk(KERN_WARNING, ha,
1732 "scsi_init_shared_tag_map failed\n");
1733 goto probe_failed;
1734 }
1735
1736 /* Startup the kernel thread for this host adapter. */
1737 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1738 "qla4xxx_dpc\n", __func__));
1739 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1740 ha->dpc_thread = create_singlethread_workqueue(buf);
1741 if (!ha->dpc_thread) {
1742 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n");
1743 ret = -ENODEV;
1744 goto probe_failed;
1745 }
1746 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1747
1748 /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
1749 * (which is called indirectly by qla4xxx_initialize_adapter),
1750 * so that irqs will be registered after crbinit but before
1751 * mbx_intr_enable.
1752 */
1753 if (!is_qla8022(ha)) {
1754 ret = qla4xxx_request_irqs(ha);
1755 if (ret) {
1756 ql4_printk(KERN_WARNING, ha, "Failed to reserve "
1757 "interrupt %d already in use.\n", pdev->irq);
1758 goto probe_failed;
1759 }
1760 }
1761
1762 pci_save_state(ha->pdev);
1763 ha->isp_ops->enable_intrs(ha);
1764
1765 /* Start timer thread. */
1766 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1767
1768 set_bit(AF_INIT_DONE, &ha->flags);
1769
1770 pci_set_drvdata(pdev, ha);
1771
1772 ret = scsi_add_host(host, &pdev->dev);
1773 if (ret)
1774 goto probe_failed;
1775
1776 printk(KERN_INFO
1777 " QLogic iSCSI HBA Driver version: %s\n"
1778 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1779 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1780 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1781 ha->patch_number, ha->build_number);
1782 scsi_scan_host(host);
1783 return 0;
1784
1785 probe_failed:
1786 qla4xxx_free_adapter(ha);
1787
1788 probe_failed_ioconfig:
1789 pci_disable_pcie_error_reporting(pdev);
1790 scsi_host_put(ha->host);
1791
1792 probe_disable_device:
1793 pci_disable_device(pdev);
1794
1795 return ret;
1796 }
1797
1798 /**
1799 * qla4xxx_remove_adapter - calback function to remove adapter.
1800 * @pci_dev: PCI device pointer
1801 **/
1802 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1803 {
1804 struct scsi_qla_host *ha;
1805
1806 ha = pci_get_drvdata(pdev);
1807
1808 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1809
1810 /* remove devs from iscsi_sessions to scsi_devices */
1811 qla4xxx_free_ddb_list(ha);
1812
1813 scsi_remove_host(ha->host);
1814
1815 qla4xxx_free_adapter(ha);
1816
1817 scsi_host_put(ha->host);
1818
1819 pci_disable_pcie_error_reporting(pdev);
1820 pci_disable_device(pdev);
1821 pci_set_drvdata(pdev, NULL);
1822 }
1823
1824 /**
1825 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1826 * @ha: HA context
1827 *
1828 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1829 * supported addressing method.
1830 */
1831 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1832 {
1833 int retval;
1834
1835 /* Update our PCI device dma_mask for full 64 bit mask */
1836 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1837 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1838 dev_dbg(&ha->pdev->dev,
1839 "Failed to set 64 bit PCI consistent mask; "
1840 "using 32 bit.\n");
1841 retval = pci_set_consistent_dma_mask(ha->pdev,
1842 DMA_BIT_MASK(32));
1843 }
1844 } else
1845 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1846 }
1847
1848 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1849 {
1850 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1851 struct ddb_entry *ddb = sess->dd_data;
1852
1853 sdev->hostdata = ddb;
1854 sdev->tagged_supported = 1;
1855 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1856 return 0;
1857 }
1858
1859 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1860 {
1861 sdev->tagged_supported = 1;
1862 return 0;
1863 }
1864
1865 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1866 {
1867 scsi_deactivate_tcq(sdev, 1);
1868 }
1869
1870 /**
1871 * qla4xxx_del_from_active_array - returns an active srb
1872 * @ha: Pointer to host adapter structure.
1873 * @index: index into the active_array
1874 *
1875 * This routine removes and returns the srb at the specified index
1876 **/
1877 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1878 uint32_t index)
1879 {
1880 struct srb *srb = NULL;
1881 struct scsi_cmnd *cmd = NULL;
1882
1883 cmd = scsi_host_find_tag(ha->host, index);
1884 if (!cmd)
1885 return srb;
1886
1887 srb = (struct srb *)CMD_SP(cmd);
1888 if (!srb)
1889 return srb;
1890
1891 /* update counters */
1892 if (srb->flags & SRB_DMA_VALID) {
1893 ha->req_q_count += srb->iocb_cnt;
1894 ha->iocb_cnt -= srb->iocb_cnt;
1895 if (srb->cmd)
1896 srb->cmd->host_scribble =
1897 (unsigned char *)(unsigned long) MAX_SRBS;
1898 }
1899 return srb;
1900 }
1901
1902 /**
1903 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1904 * @ha: Pointer to host adapter structure.
1905 * @cmd: Scsi Command to wait on.
1906 *
1907 * This routine waits for the command to be returned by the Firmware
1908 * for some max time.
1909 **/
1910 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1911 struct scsi_cmnd *cmd)
1912 {
1913 int done = 0;
1914 struct srb *rp;
1915 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1916 int ret = SUCCESS;
1917
1918 /* Dont wait on command if PCI error is being handled
1919 * by PCI AER driver
1920 */
1921 if (unlikely(pci_channel_offline(ha->pdev)) ||
1922 (test_bit(AF_EEH_BUSY, &ha->flags))) {
1923 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1924 ha->host_no, __func__);
1925 return ret;
1926 }
1927
1928 do {
1929 /* Checking to see if its returned to OS */
1930 rp = (struct srb *) CMD_SP(cmd);
1931 if (rp == NULL) {
1932 done++;
1933 break;
1934 }
1935
1936 msleep(2000);
1937 } while (max_wait_time--);
1938
1939 return done;
1940 }
1941
1942 /**
1943 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1944 * @ha: Pointer to host adapter structure
1945 **/
1946 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1947 {
1948 unsigned long wait_online;
1949
1950 wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
1951 while (time_before(jiffies, wait_online)) {
1952
1953 if (adapter_up(ha))
1954 return QLA_SUCCESS;
1955
1956 msleep(2000);
1957 }
1958
1959 return QLA_ERROR;
1960 }
1961
1962 /**
1963 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1964 * @ha: pointer to HBA
1965 * @t: target id
1966 * @l: lun id
1967 *
1968 * This function waits for all outstanding commands to a lun to complete. It
1969 * returns 0 if all pending commands are returned and 1 otherwise.
1970 **/
1971 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1972 struct scsi_target *stgt,
1973 struct scsi_device *sdev)
1974 {
1975 int cnt;
1976 int status = 0;
1977 struct scsi_cmnd *cmd;
1978
1979 /*
1980 * Waiting for all commands for the designated target or dev
1981 * in the active array
1982 */
1983 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1984 cmd = scsi_host_find_tag(ha->host, cnt);
1985 if (cmd && stgt == scsi_target(cmd->device) &&
1986 (!sdev || sdev == cmd->device)) {
1987 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1988 status++;
1989 break;
1990 }
1991 }
1992 }
1993 return status;
1994 }
1995
1996 /**
1997 * qla4xxx_eh_abort - callback for abort task.
1998 * @cmd: Pointer to Linux's SCSI command structure
1999 *
2000 * This routine is called by the Linux OS to abort the specified
2001 * command.
2002 **/
2003 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2004 {
2005 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2006 unsigned int id = cmd->device->id;
2007 unsigned int lun = cmd->device->lun;
2008 unsigned long serial = cmd->serial_number;
2009 unsigned long flags;
2010 struct srb *srb = NULL;
2011 int ret = SUCCESS;
2012 int wait = 0;
2013
2014 ql4_printk(KERN_INFO, ha,
2015 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2016 ha->host_no, id, lun, cmd, serial);
2017
2018 spin_lock_irqsave(&ha->hardware_lock, flags);
2019 srb = (struct srb *) CMD_SP(cmd);
2020 if (!srb) {
2021 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2022 return SUCCESS;
2023 }
2024 kref_get(&srb->srb_ref);
2025 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2026
2027 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2028 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2029 ha->host_no, id, lun));
2030 ret = FAILED;
2031 } else {
2032 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2033 ha->host_no, id, lun));
2034 wait = 1;
2035 }
2036
2037 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2038
2039 /* Wait for command to complete */
2040 if (wait) {
2041 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2042 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2043 ha->host_no, id, lun));
2044 ret = FAILED;
2045 }
2046 }
2047
2048 ql4_printk(KERN_INFO, ha,
2049 "scsi%ld:%d:%d: Abort command - %s\n",
2050 ha->host_no, id, lun, (ret == SUCCESS) ? "succeded" : "failed");
2051
2052 return ret;
2053 }
2054
2055 /**
2056 * qla4xxx_eh_device_reset - callback for target reset.
2057 * @cmd: Pointer to Linux's SCSI command structure
2058 *
2059 * This routine is called by the Linux OS to reset all luns on the
2060 * specified target.
2061 **/
2062 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2063 {
2064 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2065 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2066 int ret = FAILED, stat;
2067
2068 if (!ddb_entry)
2069 return ret;
2070
2071 ret = iscsi_block_scsi_eh(cmd);
2072 if (ret)
2073 return ret;
2074 ret = FAILED;
2075
2076 ql4_printk(KERN_INFO, ha,
2077 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2078 cmd->device->channel, cmd->device->id, cmd->device->lun);
2079
2080 DEBUG2(printk(KERN_INFO
2081 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2082 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2083 cmd, jiffies, cmd->request->timeout / HZ,
2084 ha->dpc_flags, cmd->result, cmd->allowed));
2085
2086 /* FIXME: wait for hba to go online */
2087 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2088 if (stat != QLA_SUCCESS) {
2089 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2090 goto eh_dev_reset_done;
2091 }
2092
2093 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2094 cmd->device)) {
2095 ql4_printk(KERN_INFO, ha,
2096 "DEVICE RESET FAILED - waiting for "
2097 "commands.\n");
2098 goto eh_dev_reset_done;
2099 }
2100
2101 /* Send marker. */
2102 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2103 MM_LUN_RESET) != QLA_SUCCESS)
2104 goto eh_dev_reset_done;
2105
2106 ql4_printk(KERN_INFO, ha,
2107 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2108 ha->host_no, cmd->device->channel, cmd->device->id,
2109 cmd->device->lun);
2110
2111 ret = SUCCESS;
2112
2113 eh_dev_reset_done:
2114
2115 return ret;
2116 }
2117
2118 /**
2119 * qla4xxx_eh_target_reset - callback for target reset.
2120 * @cmd: Pointer to Linux's SCSI command structure
2121 *
2122 * This routine is called by the Linux OS to reset the target.
2123 **/
2124 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2125 {
2126 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2127 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2128 int stat, ret;
2129
2130 if (!ddb_entry)
2131 return FAILED;
2132
2133 ret = iscsi_block_scsi_eh(cmd);
2134 if (ret)
2135 return ret;
2136
2137 starget_printk(KERN_INFO, scsi_target(cmd->device),
2138 "WARM TARGET RESET ISSUED.\n");
2139
2140 DEBUG2(printk(KERN_INFO
2141 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2142 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2143 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2144 ha->dpc_flags, cmd->result, cmd->allowed));
2145
2146 stat = qla4xxx_reset_target(ha, ddb_entry);
2147 if (stat != QLA_SUCCESS) {
2148 starget_printk(KERN_INFO, scsi_target(cmd->device),
2149 "WARM TARGET RESET FAILED.\n");
2150 return FAILED;
2151 }
2152
2153 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2154 NULL)) {
2155 starget_printk(KERN_INFO, scsi_target(cmd->device),
2156 "WARM TARGET DEVICE RESET FAILED - "
2157 "waiting for commands.\n");
2158 return FAILED;
2159 }
2160
2161 /* Send marker. */
2162 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2163 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2164 starget_printk(KERN_INFO, scsi_target(cmd->device),
2165 "WARM TARGET DEVICE RESET FAILED - "
2166 "marker iocb failed.\n");
2167 return FAILED;
2168 }
2169
2170 starget_printk(KERN_INFO, scsi_target(cmd->device),
2171 "WARM TARGET RESET SUCCEEDED.\n");
2172 return SUCCESS;
2173 }
2174
2175 /**
2176 * qla4xxx_eh_host_reset - kernel callback
2177 * @cmd: Pointer to Linux's SCSI command structure
2178 *
2179 * This routine is invoked by the Linux kernel to perform fatal error
2180 * recovery on the specified adapter.
2181 **/
2182 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2183 {
2184 int return_status = FAILED;
2185 struct scsi_qla_host *ha;
2186
2187 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2188
2189 if (ql4xdontresethba) {
2190 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2191 ha->host_no, __func__));
2192 return FAILED;
2193 }
2194
2195 ql4_printk(KERN_INFO, ha,
2196 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2197 cmd->device->channel, cmd->device->id, cmd->device->lun);
2198
2199 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2200 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2201 "DEAD.\n", ha->host_no, cmd->device->channel,
2202 __func__));
2203
2204 return FAILED;
2205 }
2206
2207 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2208 if (is_qla8022(ha))
2209 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2210 else
2211 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2212 }
2213
2214 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2215 return_status = SUCCESS;
2216
2217 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2218 return_status == FAILED ? "FAILED" : "SUCCEDED");
2219
2220 return return_status;
2221 }
2222
2223 /* PCI AER driver recovers from all correctable errors w/o
2224 * driver intervention. For uncorrectable errors PCI AER
2225 * driver calls the following device driver's callbacks
2226 *
2227 * - Fatal Errors - link_reset
2228 * - Non-Fatal Errors - driver's pci_error_detected() which
2229 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2230 *
2231 * PCI AER driver calls
2232 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2233 * returns RECOVERED or NEED_RESET if fw_hung
2234 * NEED_RESET - driver's slot_reset()
2235 * DISCONNECT - device is dead & cannot recover
2236 * RECOVERED - driver's pci_resume()
2237 */
2238 static pci_ers_result_t
2239 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2240 {
2241 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2242
2243 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2244 ha->host_no, __func__, state);
2245
2246 if (!is_aer_supported(ha))
2247 return PCI_ERS_RESULT_NONE;
2248
2249 switch (state) {
2250 case pci_channel_io_normal:
2251 clear_bit(AF_EEH_BUSY, &ha->flags);
2252 return PCI_ERS_RESULT_CAN_RECOVER;
2253 case pci_channel_io_frozen:
2254 set_bit(AF_EEH_BUSY, &ha->flags);
2255 qla4xxx_mailbox_premature_completion(ha);
2256 qla4xxx_free_irqs(ha);
2257 pci_disable_device(pdev);
2258 /* Return back all IOs */
2259 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2260 return PCI_ERS_RESULT_NEED_RESET;
2261 case pci_channel_io_perm_failure:
2262 set_bit(AF_EEH_BUSY, &ha->flags);
2263 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2264 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2265 return PCI_ERS_RESULT_DISCONNECT;
2266 }
2267 return PCI_ERS_RESULT_NEED_RESET;
2268 }
2269
2270 /**
2271 * qla4xxx_pci_mmio_enabled() gets called if
2272 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2273 * and read/write to the device still works.
2274 **/
2275 static pci_ers_result_t
2276 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2277 {
2278 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2279
2280 if (!is_aer_supported(ha))
2281 return PCI_ERS_RESULT_NONE;
2282
2283 return PCI_ERS_RESULT_RECOVERED;
2284 }
2285
2286 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2287 {
2288 uint32_t rval = QLA_ERROR;
2289 uint32_t ret = 0;
2290 int fn;
2291 struct pci_dev *other_pdev = NULL;
2292
2293 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2294
2295 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2296
2297 if (test_bit(AF_ONLINE, &ha->flags)) {
2298 clear_bit(AF_ONLINE, &ha->flags);
2299 qla4xxx_mark_all_devices_missing(ha);
2300 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2301 }
2302
2303 fn = PCI_FUNC(ha->pdev->devfn);
2304 while (fn > 0) {
2305 fn--;
2306 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2307 "func %x\n", ha->host_no, __func__, fn);
2308 /* Get the pci device given the domain, bus,
2309 * slot/function number */
2310 other_pdev =
2311 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2312 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2313 fn));
2314
2315 if (!other_pdev)
2316 continue;
2317
2318 if (atomic_read(&other_pdev->enable_cnt)) {
2319 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2320 "func in enabled state%x\n", ha->host_no,
2321 __func__, fn);
2322 pci_dev_put(other_pdev);
2323 break;
2324 }
2325 pci_dev_put(other_pdev);
2326 }
2327
2328 /* The first function on the card, the reset owner will
2329 * start & initialize the firmware. The other functions
2330 * on the card will reset the firmware context
2331 */
2332 if (!fn) {
2333 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2334 "0x%x is the owner\n", ha->host_no, __func__,
2335 ha->pdev->devfn);
2336
2337 qla4_8xxx_idc_lock(ha);
2338 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2339 QLA82XX_DEV_COLD);
2340
2341 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2342 QLA82XX_IDC_VERSION);
2343
2344 qla4_8xxx_idc_unlock(ha);
2345 clear_bit(AF_FW_RECOVERY, &ha->flags);
2346 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2347 qla4_8xxx_idc_lock(ha);
2348
2349 if (rval != QLA_SUCCESS) {
2350 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2351 "FAILED\n", ha->host_no, __func__);
2352 qla4_8xxx_clear_drv_active(ha);
2353 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2354 QLA82XX_DEV_FAILED);
2355 } else {
2356 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2357 "READY\n", ha->host_no, __func__);
2358 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2359 QLA82XX_DEV_READY);
2360 /* Clear driver state register */
2361 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2362 qla4_8xxx_set_drv_active(ha);
2363 ret = qla4xxx_request_irqs(ha);
2364 if (ret) {
2365 ql4_printk(KERN_WARNING, ha, "Failed to "
2366 "reserve interrupt %d already in use.\n",
2367 ha->pdev->irq);
2368 rval = QLA_ERROR;
2369 } else {
2370 ha->isp_ops->enable_intrs(ha);
2371 rval = QLA_SUCCESS;
2372 }
2373 }
2374 qla4_8xxx_idc_unlock(ha);
2375 } else {
2376 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2377 "the reset owner\n", ha->host_no, __func__,
2378 ha->pdev->devfn);
2379 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2380 QLA82XX_DEV_READY)) {
2381 clear_bit(AF_FW_RECOVERY, &ha->flags);
2382 rval = qla4xxx_initialize_adapter(ha,
2383 PRESERVE_DDB_LIST);
2384 if (rval == QLA_SUCCESS) {
2385 ret = qla4xxx_request_irqs(ha);
2386 if (ret) {
2387 ql4_printk(KERN_WARNING, ha, "Failed to"
2388 " reserve interrupt %d already in"
2389 " use.\n", ha->pdev->irq);
2390 rval = QLA_ERROR;
2391 } else {
2392 ha->isp_ops->enable_intrs(ha);
2393 rval = QLA_SUCCESS;
2394 }
2395 }
2396 qla4_8xxx_idc_lock(ha);
2397 qla4_8xxx_set_drv_active(ha);
2398 qla4_8xxx_idc_unlock(ha);
2399 }
2400 }
2401 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2402 return rval;
2403 }
2404
2405 static pci_ers_result_t
2406 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2407 {
2408 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2409 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2410 int rc;
2411
2412 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2413 ha->host_no, __func__);
2414
2415 if (!is_aer_supported(ha))
2416 return PCI_ERS_RESULT_NONE;
2417
2418 /* Restore the saved state of PCIe device -
2419 * BAR registers, PCI Config space, PCIX, MSI,
2420 * IOV states
2421 */
2422 pci_restore_state(pdev);
2423
2424 /* pci_restore_state() clears the saved_state flag of the device
2425 * save restored state which resets saved_state flag
2426 */
2427 pci_save_state(pdev);
2428
2429 /* Initialize device or resume if in suspended state */
2430 rc = pci_enable_device(pdev);
2431 if (rc) {
2432 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2433 "device after reset\n", ha->host_no, __func__);
2434 goto exit_slot_reset;
2435 }
2436
2437 ha->isp_ops->disable_intrs(ha);
2438
2439 if (is_qla8022(ha)) {
2440 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2441 ret = PCI_ERS_RESULT_RECOVERED;
2442 goto exit_slot_reset;
2443 } else
2444 goto exit_slot_reset;
2445 }
2446
2447 exit_slot_reset:
2448 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2449 "device after reset\n", ha->host_no, __func__, ret);
2450 return ret;
2451 }
2452
2453 static void
2454 qla4xxx_pci_resume(struct pci_dev *pdev)
2455 {
2456 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2457 int ret;
2458
2459 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2460 ha->host_no, __func__);
2461
2462 ret = qla4xxx_wait_for_hba_online(ha);
2463 if (ret != QLA_SUCCESS) {
2464 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2465 "resume I/O from slot/link_reset\n", ha->host_no,
2466 __func__);
2467 }
2468
2469 pci_cleanup_aer_uncorrect_error_status(pdev);
2470 clear_bit(AF_EEH_BUSY, &ha->flags);
2471 }
2472
2473 static struct pci_error_handlers qla4xxx_err_handler = {
2474 .error_detected = qla4xxx_pci_error_detected,
2475 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2476 .slot_reset = qla4xxx_pci_slot_reset,
2477 .resume = qla4xxx_pci_resume,
2478 };
2479
2480 static struct pci_device_id qla4xxx_pci_tbl[] = {
2481 {
2482 .vendor = PCI_VENDOR_ID_QLOGIC,
2483 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2484 .subvendor = PCI_ANY_ID,
2485 .subdevice = PCI_ANY_ID,
2486 },
2487 {
2488 .vendor = PCI_VENDOR_ID_QLOGIC,
2489 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2490 .subvendor = PCI_ANY_ID,
2491 .subdevice = PCI_ANY_ID,
2492 },
2493 {
2494 .vendor = PCI_VENDOR_ID_QLOGIC,
2495 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2496 .subvendor = PCI_ANY_ID,
2497 .subdevice = PCI_ANY_ID,
2498 },
2499 {
2500 .vendor = PCI_VENDOR_ID_QLOGIC,
2501 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2502 .subvendor = PCI_ANY_ID,
2503 .subdevice = PCI_ANY_ID,
2504 },
2505 {0, 0},
2506 };
2507 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2508
2509 static struct pci_driver qla4xxx_pci_driver = {
2510 .name = DRIVER_NAME,
2511 .id_table = qla4xxx_pci_tbl,
2512 .probe = qla4xxx_probe_adapter,
2513 .remove = qla4xxx_remove_adapter,
2514 .err_handler = &qla4xxx_err_handler,
2515 };
2516
2517 static int __init qla4xxx_module_init(void)
2518 {
2519 int ret;
2520
2521 /* Allocate cache for SRBs. */
2522 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2523 SLAB_HWCACHE_ALIGN, NULL);
2524 if (srb_cachep == NULL) {
2525 printk(KERN_ERR
2526 "%s: Unable to allocate SRB cache..."
2527 "Failing load!\n", DRIVER_NAME);
2528 ret = -ENOMEM;
2529 goto no_srp_cache;
2530 }
2531
2532 /* Derive version string. */
2533 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2534 if (ql4xextended_error_logging)
2535 strcat(qla4xxx_version_str, "-debug");
2536
2537 qla4xxx_scsi_transport =
2538 iscsi_register_transport(&qla4xxx_iscsi_transport);
2539 if (!qla4xxx_scsi_transport){
2540 ret = -ENODEV;
2541 goto release_srb_cache;
2542 }
2543
2544 ret = pci_register_driver(&qla4xxx_pci_driver);
2545 if (ret)
2546 goto unregister_transport;
2547
2548 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2549 return 0;
2550
2551 unregister_transport:
2552 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2553 release_srb_cache:
2554 kmem_cache_destroy(srb_cachep);
2555 no_srp_cache:
2556 return ret;
2557 }
2558
2559 static void __exit qla4xxx_module_exit(void)
2560 {
2561 pci_unregister_driver(&qla4xxx_pci_driver);
2562 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2563 kmem_cache_destroy(srb_cachep);
2564 }
2565
2566 module_init(qla4xxx_module_init);
2567 module_exit(qla4xxx_module_exit);
2568
2569 MODULE_AUTHOR("QLogic Corporation");
2570 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2571 MODULE_LICENSE("GPL");
2572 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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