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Merge branch 'rmobile/core' into rmobile-fixes-for-linus
[deliverable/linux.git] / drivers / scsi / qla4xxx / ql4_os.c
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 /*
885 * We cannot just check if the index is valid,
886 * becase if we are run from the scsi eh, then
887 * the scsi/block layer is going to prevent
888 * the tag from being released.
889 */
890 if (cmd != NULL && CMD_SP(cmd))
891 break;
892 }
893 spin_unlock_irqrestore(&ha->hardware_lock, flags);
894
895 /* If No Commands are pending, wait is complete */
896 if (index == ha->host->can_queue)
897 return QLA_SUCCESS;
898
899 msleep(1000);
900 }
901 /* If we timed out on waiting for commands to come back
902 * return ERROR. */
903 return QLA_ERROR;
904 }
905
906 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
907 {
908 uint32_t ctrl_status;
909 unsigned long flags = 0;
910
911 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
912
913 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
914 return QLA_ERROR;
915
916 spin_lock_irqsave(&ha->hardware_lock, flags);
917
918 /*
919 * If the SCSI Reset Interrupt bit is set, clear it.
920 * Otherwise, the Soft Reset won't work.
921 */
922 ctrl_status = readw(&ha->reg->ctrl_status);
923 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
924 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
925
926 /* Issue Soft Reset */
927 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
928 readl(&ha->reg->ctrl_status);
929
930 spin_unlock_irqrestore(&ha->hardware_lock, flags);
931 return QLA_SUCCESS;
932 }
933
934 /**
935 * qla4xxx_soft_reset - performs soft reset.
936 * @ha: Pointer to host adapter structure.
937 **/
938 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
939 {
940 uint32_t max_wait_time;
941 unsigned long flags = 0;
942 int status;
943 uint32_t ctrl_status;
944
945 status = qla4xxx_hw_reset(ha);
946 if (status != QLA_SUCCESS)
947 return status;
948
949 status = QLA_ERROR;
950 /* Wait until the Network Reset Intr bit is cleared */
951 max_wait_time = RESET_INTR_TOV;
952 do {
953 spin_lock_irqsave(&ha->hardware_lock, flags);
954 ctrl_status = readw(&ha->reg->ctrl_status);
955 spin_unlock_irqrestore(&ha->hardware_lock, flags);
956
957 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
958 break;
959
960 msleep(1000);
961 } while ((--max_wait_time));
962
963 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
964 DEBUG2(printk(KERN_WARNING
965 "scsi%ld: Network Reset Intr not cleared by "
966 "Network function, clearing it now!\n",
967 ha->host_no));
968 spin_lock_irqsave(&ha->hardware_lock, flags);
969 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
970 readl(&ha->reg->ctrl_status);
971 spin_unlock_irqrestore(&ha->hardware_lock, flags);
972 }
973
974 /* Wait until the firmware tells us the Soft Reset is done */
975 max_wait_time = SOFT_RESET_TOV;
976 do {
977 spin_lock_irqsave(&ha->hardware_lock, flags);
978 ctrl_status = readw(&ha->reg->ctrl_status);
979 spin_unlock_irqrestore(&ha->hardware_lock, flags);
980
981 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
982 status = QLA_SUCCESS;
983 break;
984 }
985
986 msleep(1000);
987 } while ((--max_wait_time));
988
989 /*
990 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
991 * after the soft reset has taken place.
992 */
993 spin_lock_irqsave(&ha->hardware_lock, flags);
994 ctrl_status = readw(&ha->reg->ctrl_status);
995 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
996 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
997 readl(&ha->reg->ctrl_status);
998 }
999 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1000
1001 /* If soft reset fails then most probably the bios on other
1002 * function is also enabled.
1003 * Since the initialization is sequential the other fn
1004 * wont be able to acknowledge the soft reset.
1005 * Issue a force soft reset to workaround this scenario.
1006 */
1007 if (max_wait_time == 0) {
1008 /* Issue Force Soft Reset */
1009 spin_lock_irqsave(&ha->hardware_lock, flags);
1010 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1011 readl(&ha->reg->ctrl_status);
1012 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1013 /* Wait until the firmware tells us the Soft Reset is done */
1014 max_wait_time = SOFT_RESET_TOV;
1015 do {
1016 spin_lock_irqsave(&ha->hardware_lock, flags);
1017 ctrl_status = readw(&ha->reg->ctrl_status);
1018 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1019
1020 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1021 status = QLA_SUCCESS;
1022 break;
1023 }
1024
1025 msleep(1000);
1026 } while ((--max_wait_time));
1027 }
1028
1029 return status;
1030 }
1031
1032 /**
1033 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1034 * @ha: Pointer to host adapter structure.
1035 * @res: returned scsi status
1036 *
1037 * This routine is called just prior to a HARD RESET to return all
1038 * outstanding commands back to the Operating System.
1039 * Caller should make sure that the following locks are released
1040 * before this calling routine: Hardware lock, and io_request_lock.
1041 **/
1042 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1043 {
1044 struct srb *srb;
1045 int i;
1046 unsigned long flags;
1047
1048 spin_lock_irqsave(&ha->hardware_lock, flags);
1049 for (i = 0; i < ha->host->can_queue; i++) {
1050 srb = qla4xxx_del_from_active_array(ha, i);
1051 if (srb != NULL) {
1052 srb->cmd->result = res;
1053 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1054 }
1055 }
1056 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1057 }
1058
1059 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1060 {
1061 clear_bit(AF_ONLINE, &ha->flags);
1062
1063 /* Disable the board */
1064 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1065 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1066
1067 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1068 qla4xxx_mark_all_devices_missing(ha);
1069 clear_bit(AF_INIT_DONE, &ha->flags);
1070 }
1071
1072 /**
1073 * qla4xxx_recover_adapter - recovers adapter after a fatal error
1074 * @ha: Pointer to host adapter structure.
1075 **/
1076 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1077 {
1078 int status = QLA_ERROR;
1079 uint8_t reset_chip = 0;
1080
1081 /* Stall incoming I/O until we are done */
1082 scsi_block_requests(ha->host);
1083 clear_bit(AF_ONLINE, &ha->flags);
1084
1085 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1086
1087 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1088
1089 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1090 reset_chip = 1;
1091
1092 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1093 * do not reset adapter, jump to initialize_adapter */
1094 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1095 status = QLA_SUCCESS;
1096 goto recover_ha_init_adapter;
1097 }
1098
1099 /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1100 * from eh_host_reset or ioctl module */
1101 if (is_qla8022(ha) && !reset_chip &&
1102 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1103
1104 DEBUG2(ql4_printk(KERN_INFO, ha,
1105 "scsi%ld: %s - Performing stop_firmware...\n",
1106 ha->host_no, __func__));
1107 status = ha->isp_ops->reset_firmware(ha);
1108 if (status == QLA_SUCCESS) {
1109 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1110 qla4xxx_cmd_wait(ha);
1111 ha->isp_ops->disable_intrs(ha);
1112 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1113 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1114 } else {
1115 /* If the stop_firmware fails then
1116 * reset the entire chip */
1117 reset_chip = 1;
1118 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1119 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1120 }
1121 }
1122
1123 /* Issue full chip reset if recovering from a catastrophic error,
1124 * or if stop_firmware fails for ISP-82xx.
1125 * This is the default case for ISP-4xxx */
1126 if (!is_qla8022(ha) || reset_chip) {
1127 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1128 qla4xxx_cmd_wait(ha);
1129 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1130 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1131 DEBUG2(ql4_printk(KERN_INFO, ha,
1132 "scsi%ld: %s - Performing chip reset..\n",
1133 ha->host_no, __func__));
1134 status = ha->isp_ops->reset_chip(ha);
1135 }
1136
1137 /* Flush any pending ddb changed AENs */
1138 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1139
1140 recover_ha_init_adapter:
1141 /* Upon successful firmware/chip reset, re-initialize the adapter */
1142 if (status == QLA_SUCCESS) {
1143 /* For ISP-4xxx, force function 1 to always initialize
1144 * before function 3 to prevent both funcions from
1145 * stepping on top of the other */
1146 if (!is_qla8022(ha) && (ha->mac_index == 3))
1147 ssleep(6);
1148
1149 /* NOTE: AF_ONLINE flag set upon successful completion of
1150 * qla4xxx_initialize_adapter */
1151 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1152 }
1153
1154 /* Retry failed adapter initialization, if necessary
1155 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1156 * case to prevent ping-pong resets between functions */
1157 if (!test_bit(AF_ONLINE, &ha->flags) &&
1158 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1159 /* Adapter initialization failed, see if we can retry
1160 * resetting the ha.
1161 * Since we don't want to block the DPC for too long
1162 * with multiple resets in the same thread,
1163 * utilize DPC to retry */
1164 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1165 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1166 DEBUG2(printk("scsi%ld: recover adapter - retrying "
1167 "(%d) more times\n", ha->host_no,
1168 ha->retry_reset_ha_cnt));
1169 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1170 status = QLA_ERROR;
1171 } else {
1172 if (ha->retry_reset_ha_cnt > 0) {
1173 /* Schedule another Reset HA--DPC will retry */
1174 ha->retry_reset_ha_cnt--;
1175 DEBUG2(printk("scsi%ld: recover adapter - "
1176 "retry remaining %d\n",
1177 ha->host_no,
1178 ha->retry_reset_ha_cnt));
1179 status = QLA_ERROR;
1180 }
1181
1182 if (ha->retry_reset_ha_cnt == 0) {
1183 /* Recover adapter retries have been exhausted.
1184 * Adapter DEAD */
1185 DEBUG2(printk("scsi%ld: recover adapter "
1186 "failed - board disabled\n",
1187 ha->host_no));
1188 qla4xxx_dead_adapter_cleanup(ha);
1189 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1190 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1191 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1192 &ha->dpc_flags);
1193 status = QLA_ERROR;
1194 }
1195 }
1196 } else {
1197 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1198 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1199 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1200 }
1201
1202 ha->adapter_error_count++;
1203
1204 if (test_bit(AF_ONLINE, &ha->flags))
1205 ha->isp_ops->enable_intrs(ha);
1206
1207 scsi_unblock_requests(ha->host);
1208
1209 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1210 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1211 status == QLA_ERROR ? "FAILED" : "SUCCEDED"));
1212
1213 return status;
1214 }
1215
1216 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1217 {
1218 if (ha->dpc_thread &&
1219 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1220 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1221 queue_work(ha->dpc_thread, &ha->dpc_work);
1222 }
1223 }
1224
1225 /**
1226 * qla4xxx_do_dpc - dpc routine
1227 * @data: in our case pointer to adapter structure
1228 *
1229 * This routine is a task that is schedule by the interrupt handler
1230 * to perform the background processing for interrupts. We put it
1231 * on a task queue that is consumed whenever the scheduler runs; that's
1232 * so you can do anything (i.e. put the process to sleep etc). In fact,
1233 * the mid-level tries to sleep when it reaches the driver threshold
1234 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1235 **/
1236 static void qla4xxx_do_dpc(struct work_struct *work)
1237 {
1238 struct scsi_qla_host *ha =
1239 container_of(work, struct scsi_qla_host, dpc_work);
1240 struct ddb_entry *ddb_entry, *dtemp;
1241 int status = QLA_ERROR;
1242
1243 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1244 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1245 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1246
1247 /* Initialization not yet finished. Don't do anything yet. */
1248 if (!test_bit(AF_INIT_DONE, &ha->flags))
1249 goto do_dpc_exit;
1250
1251 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1252 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1253 ha->host_no, __func__, ha->flags));
1254 goto do_dpc_exit;
1255 }
1256
1257 /* HBA is in the process of being permanently disabled.
1258 * Don't process anything */
1259 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1260 return;
1261
1262 if (is_qla8022(ha)) {
1263 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1264 qla4_8xxx_idc_lock(ha);
1265 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1266 QLA82XX_DEV_FAILED);
1267 qla4_8xxx_idc_unlock(ha);
1268 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1269 qla4_8xxx_device_state_handler(ha);
1270 }
1271 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1272 qla4_8xxx_need_qsnt_handler(ha);
1273 }
1274 }
1275
1276 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1277 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1278 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1279 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1280 if (ql4xdontresethba) {
1281 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1282 ha->host_no, __func__));
1283 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1284 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1285 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1286 goto dpc_post_reset_ha;
1287 }
1288 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1289 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1290 qla4xxx_recover_adapter(ha);
1291
1292 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1293 uint8_t wait_time = RESET_INTR_TOV;
1294
1295 while ((readw(&ha->reg->ctrl_status) &
1296 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1297 if (--wait_time == 0)
1298 break;
1299 msleep(1000);
1300 }
1301 if (wait_time == 0)
1302 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1303 "bit not cleared-- resetting\n",
1304 ha->host_no, __func__));
1305 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1306 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1307 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1308 status = qla4xxx_recover_adapter(ha);
1309 }
1310 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1311 if (status == QLA_SUCCESS)
1312 ha->isp_ops->enable_intrs(ha);
1313 }
1314 }
1315
1316 dpc_post_reset_ha:
1317 /* ---- process AEN? --- */
1318 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1319 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1320
1321 /* ---- Get DHCP IP Address? --- */
1322 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1323 qla4xxx_get_dhcp_ip_address(ha);
1324
1325 /* ---- link change? --- */
1326 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1327 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1328 /* ---- link down? --- */
1329 list_for_each_entry_safe(ddb_entry, dtemp,
1330 &ha->ddb_list, list) {
1331 if (atomic_read(&ddb_entry->state) ==
1332 DDB_STATE_ONLINE)
1333 qla4xxx_mark_device_missing(ha,
1334 ddb_entry);
1335 }
1336 } else {
1337 /* ---- link up? --- *
1338 * F/W will auto login to all devices ONLY ONCE after
1339 * link up during driver initialization and runtime
1340 * fatal error recovery. Therefore, the driver must
1341 * manually relogin to devices when recovering from
1342 * connection failures, logouts, expired KATO, etc. */
1343
1344 list_for_each_entry_safe(ddb_entry, dtemp,
1345 &ha->ddb_list, list) {
1346 if ((atomic_read(&ddb_entry->state) ==
1347 DDB_STATE_MISSING) ||
1348 (atomic_read(&ddb_entry->state) ==
1349 DDB_STATE_DEAD)) {
1350 if (ddb_entry->fw_ddb_device_state ==
1351 DDB_DS_SESSION_ACTIVE) {
1352 atomic_set(&ddb_entry->state,
1353 DDB_STATE_ONLINE);
1354 ql4_printk(KERN_INFO, ha,
1355 "scsi%ld: %s: ddb[%d]"
1356 " marked ONLINE\n",
1357 ha->host_no, __func__,
1358 ddb_entry->fw_ddb_index);
1359
1360 iscsi_unblock_session(
1361 ddb_entry->sess);
1362 } else
1363 qla4xxx_relogin_device(
1364 ha, ddb_entry);
1365 }
1366
1367 }
1368 }
1369 }
1370
1371 /* ---- relogin device? --- */
1372 if (adapter_up(ha) &&
1373 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1374 list_for_each_entry_safe(ddb_entry, dtemp,
1375 &ha->ddb_list, list) {
1376 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1377 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1378 qla4xxx_relogin_device(ha, ddb_entry);
1379
1380 /*
1381 * If mbx cmd times out there is no point
1382 * in continuing further.
1383 * With large no of targets this can hang
1384 * the system.
1385 */
1386 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1387 printk(KERN_WARNING "scsi%ld: %s: "
1388 "need to reset hba\n",
1389 ha->host_no, __func__);
1390 break;
1391 }
1392 }
1393 }
1394
1395 do_dpc_exit:
1396 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1397 }
1398
1399 /**
1400 * qla4xxx_free_adapter - release the adapter
1401 * @ha: pointer to adapter structure
1402 **/
1403 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1404 {
1405
1406 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1407 /* Turn-off interrupts on the card. */
1408 ha->isp_ops->disable_intrs(ha);
1409 }
1410
1411 /* Remove timer thread, if present */
1412 if (ha->timer_active)
1413 qla4xxx_stop_timer(ha);
1414
1415 /* Kill the kernel thread for this host */
1416 if (ha->dpc_thread)
1417 destroy_workqueue(ha->dpc_thread);
1418
1419 /* Put firmware in known state */
1420 ha->isp_ops->reset_firmware(ha);
1421
1422 if (is_qla8022(ha)) {
1423 qla4_8xxx_idc_lock(ha);
1424 qla4_8xxx_clear_drv_active(ha);
1425 qla4_8xxx_idc_unlock(ha);
1426 }
1427
1428 /* Detach interrupts */
1429 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1430 qla4xxx_free_irqs(ha);
1431
1432 /* free extra memory */
1433 qla4xxx_mem_free(ha);
1434 }
1435
1436 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1437 {
1438 int status = 0;
1439 uint8_t revision_id;
1440 unsigned long mem_base, mem_len, db_base, db_len;
1441 struct pci_dev *pdev = ha->pdev;
1442
1443 status = pci_request_regions(pdev, DRIVER_NAME);
1444 if (status) {
1445 printk(KERN_WARNING
1446 "scsi(%ld) Failed to reserve PIO regions (%s) "
1447 "status=%d\n", ha->host_no, pci_name(pdev), status);
1448 goto iospace_error_exit;
1449 }
1450
1451 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1452 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1453 __func__, revision_id));
1454 ha->revision_id = revision_id;
1455
1456 /* remap phys address */
1457 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1458 mem_len = pci_resource_len(pdev, 0);
1459 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1460 __func__, mem_base, mem_len));
1461
1462 /* mapping of pcibase pointer */
1463 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1464 if (!ha->nx_pcibase) {
1465 printk(KERN_ERR
1466 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1467 pci_release_regions(ha->pdev);
1468 goto iospace_error_exit;
1469 }
1470
1471 /* Mapping of IO base pointer, door bell read and write pointer */
1472
1473 /* mapping of IO base pointer */
1474 ha->qla4_8xxx_reg =
1475 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1476 0xbc000 + (ha->pdev->devfn << 11));
1477
1478 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1479 db_len = pci_resource_len(pdev, 4);
1480
1481 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1482 QLA82XX_CAM_RAM_DB2);
1483
1484 return 0;
1485 iospace_error_exit:
1486 return -ENOMEM;
1487 }
1488
1489 /***
1490 * qla4xxx_iospace_config - maps registers
1491 * @ha: pointer to adapter structure
1492 *
1493 * This routines maps HBA's registers from the pci address space
1494 * into the kernel virtual address space for memory mapped i/o.
1495 **/
1496 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1497 {
1498 unsigned long pio, pio_len, pio_flags;
1499 unsigned long mmio, mmio_len, mmio_flags;
1500
1501 pio = pci_resource_start(ha->pdev, 0);
1502 pio_len = pci_resource_len(ha->pdev, 0);
1503 pio_flags = pci_resource_flags(ha->pdev, 0);
1504 if (pio_flags & IORESOURCE_IO) {
1505 if (pio_len < MIN_IOBASE_LEN) {
1506 ql4_printk(KERN_WARNING, ha,
1507 "Invalid PCI I/O region size\n");
1508 pio = 0;
1509 }
1510 } else {
1511 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1512 pio = 0;
1513 }
1514
1515 /* Use MMIO operations for all accesses. */
1516 mmio = pci_resource_start(ha->pdev, 1);
1517 mmio_len = pci_resource_len(ha->pdev, 1);
1518 mmio_flags = pci_resource_flags(ha->pdev, 1);
1519
1520 if (!(mmio_flags & IORESOURCE_MEM)) {
1521 ql4_printk(KERN_ERR, ha,
1522 "region #0 not an MMIO resource, aborting\n");
1523
1524 goto iospace_error_exit;
1525 }
1526
1527 if (mmio_len < MIN_IOBASE_LEN) {
1528 ql4_printk(KERN_ERR, ha,
1529 "Invalid PCI mem region size, aborting\n");
1530 goto iospace_error_exit;
1531 }
1532
1533 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1534 ql4_printk(KERN_WARNING, ha,
1535 "Failed to reserve PIO/MMIO regions\n");
1536
1537 goto iospace_error_exit;
1538 }
1539
1540 ha->pio_address = pio;
1541 ha->pio_length = pio_len;
1542 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1543 if (!ha->reg) {
1544 ql4_printk(KERN_ERR, ha,
1545 "cannot remap MMIO, aborting\n");
1546
1547 goto iospace_error_exit;
1548 }
1549
1550 return 0;
1551
1552 iospace_error_exit:
1553 return -ENOMEM;
1554 }
1555
1556 static struct isp_operations qla4xxx_isp_ops = {
1557 .iospace_config = qla4xxx_iospace_config,
1558 .pci_config = qla4xxx_pci_config,
1559 .disable_intrs = qla4xxx_disable_intrs,
1560 .enable_intrs = qla4xxx_enable_intrs,
1561 .start_firmware = qla4xxx_start_firmware,
1562 .intr_handler = qla4xxx_intr_handler,
1563 .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1564 .reset_chip = qla4xxx_soft_reset,
1565 .reset_firmware = qla4xxx_hw_reset,
1566 .queue_iocb = qla4xxx_queue_iocb,
1567 .complete_iocb = qla4xxx_complete_iocb,
1568 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out,
1569 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in,
1570 .get_sys_info = qla4xxx_get_sys_info,
1571 };
1572
1573 static struct isp_operations qla4_8xxx_isp_ops = {
1574 .iospace_config = qla4_8xxx_iospace_config,
1575 .pci_config = qla4_8xxx_pci_config,
1576 .disable_intrs = qla4_8xxx_disable_intrs,
1577 .enable_intrs = qla4_8xxx_enable_intrs,
1578 .start_firmware = qla4_8xxx_load_risc,
1579 .intr_handler = qla4_8xxx_intr_handler,
1580 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1581 .reset_chip = qla4_8xxx_isp_reset,
1582 .reset_firmware = qla4_8xxx_stop_firmware,
1583 .queue_iocb = qla4_8xxx_queue_iocb,
1584 .complete_iocb = qla4_8xxx_complete_iocb,
1585 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out,
1586 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in,
1587 .get_sys_info = qla4_8xxx_get_sys_info,
1588 };
1589
1590 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1591 {
1592 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1593 }
1594
1595 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1596 {
1597 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1598 }
1599
1600 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1601 {
1602 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1603 }
1604
1605 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1606 {
1607 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1608 }
1609
1610 /**
1611 * qla4xxx_probe_adapter - callback function to probe HBA
1612 * @pdev: pointer to pci_dev structure
1613 * @pci_device_id: pointer to pci_device entry
1614 *
1615 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1616 * It returns zero if successful. It also initializes all data necessary for
1617 * the driver.
1618 **/
1619 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1620 const struct pci_device_id *ent)
1621 {
1622 int ret = -ENODEV, status;
1623 struct Scsi_Host *host;
1624 struct scsi_qla_host *ha;
1625 uint8_t init_retry_count = 0;
1626 char buf[34];
1627 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1628
1629 if (pci_enable_device(pdev))
1630 return -1;
1631
1632 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1633 if (host == NULL) {
1634 printk(KERN_WARNING
1635 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1636 goto probe_disable_device;
1637 }
1638
1639 /* Clear our data area */
1640 ha = (struct scsi_qla_host *) host->hostdata;
1641 memset(ha, 0, sizeof(*ha));
1642
1643 /* Save the information from PCI BIOS. */
1644 ha->pdev = pdev;
1645 ha->host = host;
1646 ha->host_no = host->host_no;
1647
1648 pci_enable_pcie_error_reporting(pdev);
1649
1650 /* Setup Runtime configurable options */
1651 if (is_qla8022(ha)) {
1652 ha->isp_ops = &qla4_8xxx_isp_ops;
1653 rwlock_init(&ha->hw_lock);
1654 ha->qdr_sn_window = -1;
1655 ha->ddr_mn_window = -1;
1656 ha->curr_window = 255;
1657 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1658 nx_legacy_intr = &legacy_intr[ha->func_num];
1659 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1660 ha->nx_legacy_intr.tgt_status_reg =
1661 nx_legacy_intr->tgt_status_reg;
1662 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1663 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1664 } else {
1665 ha->isp_ops = &qla4xxx_isp_ops;
1666 }
1667
1668 /* Set EEH reset type to fundamental if required by hba */
1669 if (is_qla8022(ha))
1670 pdev->needs_freset = 1;
1671
1672 /* Configure PCI I/O space. */
1673 ret = ha->isp_ops->iospace_config(ha);
1674 if (ret)
1675 goto probe_failed_ioconfig;
1676
1677 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1678 pdev->device, pdev->irq, ha->reg);
1679
1680 qla4xxx_config_dma_addressing(ha);
1681
1682 /* Initialize lists and spinlocks. */
1683 INIT_LIST_HEAD(&ha->ddb_list);
1684 INIT_LIST_HEAD(&ha->free_srb_q);
1685
1686 mutex_init(&ha->mbox_sem);
1687 init_completion(&ha->mbx_intr_comp);
1688
1689 spin_lock_init(&ha->hardware_lock);
1690
1691 /* Allocate dma buffers */
1692 if (qla4xxx_mem_alloc(ha)) {
1693 ql4_printk(KERN_WARNING, ha,
1694 "[ERROR] Failed to allocate memory for adapter\n");
1695
1696 ret = -ENOMEM;
1697 goto probe_failed;
1698 }
1699
1700 if (is_qla8022(ha))
1701 (void) qla4_8xxx_get_flash_info(ha);
1702
1703 /*
1704 * Initialize the Host adapter request/response queues and
1705 * firmware
1706 * NOTE: interrupts enabled upon successful completion
1707 */
1708 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1709 while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1710 init_retry_count++ < MAX_INIT_RETRIES) {
1711 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1712 "(%d)\n", __func__, init_retry_count));
1713
1714 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
1715 continue;
1716
1717 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1718 }
1719
1720 if (!test_bit(AF_ONLINE, &ha->flags)) {
1721 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n");
1722
1723 ret = -ENODEV;
1724 goto probe_failed;
1725 }
1726
1727 host->cmd_per_lun = 3;
1728 host->max_channel = 0;
1729 host->max_lun = MAX_LUNS - 1;
1730 host->max_id = MAX_TARGETS;
1731 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1732 host->can_queue = MAX_SRBS ;
1733 host->transportt = qla4xxx_scsi_transport;
1734
1735 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1736 if (ret) {
1737 ql4_printk(KERN_WARNING, ha,
1738 "scsi_init_shared_tag_map failed\n");
1739 goto probe_failed;
1740 }
1741
1742 /* Startup the kernel thread for this host adapter. */
1743 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1744 "qla4xxx_dpc\n", __func__));
1745 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1746 ha->dpc_thread = create_singlethread_workqueue(buf);
1747 if (!ha->dpc_thread) {
1748 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n");
1749 ret = -ENODEV;
1750 goto probe_failed;
1751 }
1752 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1753
1754 /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
1755 * (which is called indirectly by qla4xxx_initialize_adapter),
1756 * so that irqs will be registered after crbinit but before
1757 * mbx_intr_enable.
1758 */
1759 if (!is_qla8022(ha)) {
1760 ret = qla4xxx_request_irqs(ha);
1761 if (ret) {
1762 ql4_printk(KERN_WARNING, ha, "Failed to reserve "
1763 "interrupt %d already in use.\n", pdev->irq);
1764 goto probe_failed;
1765 }
1766 }
1767
1768 pci_save_state(ha->pdev);
1769 ha->isp_ops->enable_intrs(ha);
1770
1771 /* Start timer thread. */
1772 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1773
1774 set_bit(AF_INIT_DONE, &ha->flags);
1775
1776 pci_set_drvdata(pdev, ha);
1777
1778 ret = scsi_add_host(host, &pdev->dev);
1779 if (ret)
1780 goto probe_failed;
1781
1782 printk(KERN_INFO
1783 " QLogic iSCSI HBA Driver version: %s\n"
1784 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1785 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1786 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1787 ha->patch_number, ha->build_number);
1788 scsi_scan_host(host);
1789 return 0;
1790
1791 probe_failed:
1792 qla4xxx_free_adapter(ha);
1793
1794 probe_failed_ioconfig:
1795 pci_disable_pcie_error_reporting(pdev);
1796 scsi_host_put(ha->host);
1797
1798 probe_disable_device:
1799 pci_disable_device(pdev);
1800
1801 return ret;
1802 }
1803
1804 /**
1805 * qla4xxx_remove_adapter - calback function to remove adapter.
1806 * @pci_dev: PCI device pointer
1807 **/
1808 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1809 {
1810 struct scsi_qla_host *ha;
1811
1812 ha = pci_get_drvdata(pdev);
1813
1814 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1815
1816 /* remove devs from iscsi_sessions to scsi_devices */
1817 qla4xxx_free_ddb_list(ha);
1818
1819 scsi_remove_host(ha->host);
1820
1821 qla4xxx_free_adapter(ha);
1822
1823 scsi_host_put(ha->host);
1824
1825 pci_disable_pcie_error_reporting(pdev);
1826 pci_disable_device(pdev);
1827 pci_set_drvdata(pdev, NULL);
1828 }
1829
1830 /**
1831 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1832 * @ha: HA context
1833 *
1834 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1835 * supported addressing method.
1836 */
1837 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1838 {
1839 int retval;
1840
1841 /* Update our PCI device dma_mask for full 64 bit mask */
1842 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1843 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1844 dev_dbg(&ha->pdev->dev,
1845 "Failed to set 64 bit PCI consistent mask; "
1846 "using 32 bit.\n");
1847 retval = pci_set_consistent_dma_mask(ha->pdev,
1848 DMA_BIT_MASK(32));
1849 }
1850 } else
1851 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1852 }
1853
1854 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1855 {
1856 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1857 struct ddb_entry *ddb = sess->dd_data;
1858
1859 sdev->hostdata = ddb;
1860 sdev->tagged_supported = 1;
1861 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1862 return 0;
1863 }
1864
1865 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1866 {
1867 sdev->tagged_supported = 1;
1868 return 0;
1869 }
1870
1871 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1872 {
1873 scsi_deactivate_tcq(sdev, 1);
1874 }
1875
1876 /**
1877 * qla4xxx_del_from_active_array - returns an active srb
1878 * @ha: Pointer to host adapter structure.
1879 * @index: index into the active_array
1880 *
1881 * This routine removes and returns the srb at the specified index
1882 **/
1883 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1884 uint32_t index)
1885 {
1886 struct srb *srb = NULL;
1887 struct scsi_cmnd *cmd = NULL;
1888
1889 cmd = scsi_host_find_tag(ha->host, index);
1890 if (!cmd)
1891 return srb;
1892
1893 srb = (struct srb *)CMD_SP(cmd);
1894 if (!srb)
1895 return srb;
1896
1897 /* update counters */
1898 if (srb->flags & SRB_DMA_VALID) {
1899 ha->req_q_count += srb->iocb_cnt;
1900 ha->iocb_cnt -= srb->iocb_cnt;
1901 if (srb->cmd)
1902 srb->cmd->host_scribble =
1903 (unsigned char *)(unsigned long) MAX_SRBS;
1904 }
1905 return srb;
1906 }
1907
1908 /**
1909 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1910 * @ha: Pointer to host adapter structure.
1911 * @cmd: Scsi Command to wait on.
1912 *
1913 * This routine waits for the command to be returned by the Firmware
1914 * for some max time.
1915 **/
1916 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1917 struct scsi_cmnd *cmd)
1918 {
1919 int done = 0;
1920 struct srb *rp;
1921 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1922 int ret = SUCCESS;
1923
1924 /* Dont wait on command if PCI error is being handled
1925 * by PCI AER driver
1926 */
1927 if (unlikely(pci_channel_offline(ha->pdev)) ||
1928 (test_bit(AF_EEH_BUSY, &ha->flags))) {
1929 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1930 ha->host_no, __func__);
1931 return ret;
1932 }
1933
1934 do {
1935 /* Checking to see if its returned to OS */
1936 rp = (struct srb *) CMD_SP(cmd);
1937 if (rp == NULL) {
1938 done++;
1939 break;
1940 }
1941
1942 msleep(2000);
1943 } while (max_wait_time--);
1944
1945 return done;
1946 }
1947
1948 /**
1949 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1950 * @ha: Pointer to host adapter structure
1951 **/
1952 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1953 {
1954 unsigned long wait_online;
1955
1956 wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
1957 while (time_before(jiffies, wait_online)) {
1958
1959 if (adapter_up(ha))
1960 return QLA_SUCCESS;
1961
1962 msleep(2000);
1963 }
1964
1965 return QLA_ERROR;
1966 }
1967
1968 /**
1969 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1970 * @ha: pointer to HBA
1971 * @t: target id
1972 * @l: lun id
1973 *
1974 * This function waits for all outstanding commands to a lun to complete. It
1975 * returns 0 if all pending commands are returned and 1 otherwise.
1976 **/
1977 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1978 struct scsi_target *stgt,
1979 struct scsi_device *sdev)
1980 {
1981 int cnt;
1982 int status = 0;
1983 struct scsi_cmnd *cmd;
1984
1985 /*
1986 * Waiting for all commands for the designated target or dev
1987 * in the active array
1988 */
1989 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1990 cmd = scsi_host_find_tag(ha->host, cnt);
1991 if (cmd && stgt == scsi_target(cmd->device) &&
1992 (!sdev || sdev == cmd->device)) {
1993 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1994 status++;
1995 break;
1996 }
1997 }
1998 }
1999 return status;
2000 }
2001
2002 /**
2003 * qla4xxx_eh_abort - callback for abort task.
2004 * @cmd: Pointer to Linux's SCSI command structure
2005 *
2006 * This routine is called by the Linux OS to abort the specified
2007 * command.
2008 **/
2009 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2010 {
2011 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2012 unsigned int id = cmd->device->id;
2013 unsigned int lun = cmd->device->lun;
2014 unsigned long serial = cmd->serial_number;
2015 unsigned long flags;
2016 struct srb *srb = NULL;
2017 int ret = SUCCESS;
2018 int wait = 0;
2019
2020 ql4_printk(KERN_INFO, ha,
2021 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2022 ha->host_no, id, lun, cmd, serial);
2023
2024 spin_lock_irqsave(&ha->hardware_lock, flags);
2025 srb = (struct srb *) CMD_SP(cmd);
2026 if (!srb) {
2027 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2028 return SUCCESS;
2029 }
2030 kref_get(&srb->srb_ref);
2031 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2032
2033 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2034 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2035 ha->host_no, id, lun));
2036 ret = FAILED;
2037 } else {
2038 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2039 ha->host_no, id, lun));
2040 wait = 1;
2041 }
2042
2043 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2044
2045 /* Wait for command to complete */
2046 if (wait) {
2047 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2048 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2049 ha->host_no, id, lun));
2050 ret = FAILED;
2051 }
2052 }
2053
2054 ql4_printk(KERN_INFO, ha,
2055 "scsi%ld:%d:%d: Abort command - %s\n",
2056 ha->host_no, id, lun, (ret == SUCCESS) ? "succeded" : "failed");
2057
2058 return ret;
2059 }
2060
2061 /**
2062 * qla4xxx_eh_device_reset - callback for target reset.
2063 * @cmd: Pointer to Linux's SCSI command structure
2064 *
2065 * This routine is called by the Linux OS to reset all luns on the
2066 * specified target.
2067 **/
2068 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2069 {
2070 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2071 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2072 int ret = FAILED, stat;
2073
2074 if (!ddb_entry)
2075 return ret;
2076
2077 ret = iscsi_block_scsi_eh(cmd);
2078 if (ret)
2079 return ret;
2080 ret = FAILED;
2081
2082 ql4_printk(KERN_INFO, ha,
2083 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2084 cmd->device->channel, cmd->device->id, cmd->device->lun);
2085
2086 DEBUG2(printk(KERN_INFO
2087 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2088 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2089 cmd, jiffies, cmd->request->timeout / HZ,
2090 ha->dpc_flags, cmd->result, cmd->allowed));
2091
2092 /* FIXME: wait for hba to go online */
2093 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2094 if (stat != QLA_SUCCESS) {
2095 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2096 goto eh_dev_reset_done;
2097 }
2098
2099 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2100 cmd->device)) {
2101 ql4_printk(KERN_INFO, ha,
2102 "DEVICE RESET FAILED - waiting for "
2103 "commands.\n");
2104 goto eh_dev_reset_done;
2105 }
2106
2107 /* Send marker. */
2108 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2109 MM_LUN_RESET) != QLA_SUCCESS)
2110 goto eh_dev_reset_done;
2111
2112 ql4_printk(KERN_INFO, ha,
2113 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2114 ha->host_no, cmd->device->channel, cmd->device->id,
2115 cmd->device->lun);
2116
2117 ret = SUCCESS;
2118
2119 eh_dev_reset_done:
2120
2121 return ret;
2122 }
2123
2124 /**
2125 * qla4xxx_eh_target_reset - callback for target reset.
2126 * @cmd: Pointer to Linux's SCSI command structure
2127 *
2128 * This routine is called by the Linux OS to reset the target.
2129 **/
2130 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2131 {
2132 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2133 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2134 int stat, ret;
2135
2136 if (!ddb_entry)
2137 return FAILED;
2138
2139 ret = iscsi_block_scsi_eh(cmd);
2140 if (ret)
2141 return ret;
2142
2143 starget_printk(KERN_INFO, scsi_target(cmd->device),
2144 "WARM TARGET RESET ISSUED.\n");
2145
2146 DEBUG2(printk(KERN_INFO
2147 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2148 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2149 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2150 ha->dpc_flags, cmd->result, cmd->allowed));
2151
2152 stat = qla4xxx_reset_target(ha, ddb_entry);
2153 if (stat != QLA_SUCCESS) {
2154 starget_printk(KERN_INFO, scsi_target(cmd->device),
2155 "WARM TARGET RESET FAILED.\n");
2156 return FAILED;
2157 }
2158
2159 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2160 NULL)) {
2161 starget_printk(KERN_INFO, scsi_target(cmd->device),
2162 "WARM TARGET DEVICE RESET FAILED - "
2163 "waiting for commands.\n");
2164 return FAILED;
2165 }
2166
2167 /* Send marker. */
2168 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2169 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2170 starget_printk(KERN_INFO, scsi_target(cmd->device),
2171 "WARM TARGET DEVICE RESET FAILED - "
2172 "marker iocb failed.\n");
2173 return FAILED;
2174 }
2175
2176 starget_printk(KERN_INFO, scsi_target(cmd->device),
2177 "WARM TARGET RESET SUCCEEDED.\n");
2178 return SUCCESS;
2179 }
2180
2181 /**
2182 * qla4xxx_eh_host_reset - kernel callback
2183 * @cmd: Pointer to Linux's SCSI command structure
2184 *
2185 * This routine is invoked by the Linux kernel to perform fatal error
2186 * recovery on the specified adapter.
2187 **/
2188 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2189 {
2190 int return_status = FAILED;
2191 struct scsi_qla_host *ha;
2192
2193 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2194
2195 if (ql4xdontresethba) {
2196 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2197 ha->host_no, __func__));
2198 return FAILED;
2199 }
2200
2201 ql4_printk(KERN_INFO, ha,
2202 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2203 cmd->device->channel, cmd->device->id, cmd->device->lun);
2204
2205 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2206 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2207 "DEAD.\n", ha->host_no, cmd->device->channel,
2208 __func__));
2209
2210 return FAILED;
2211 }
2212
2213 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2214 if (is_qla8022(ha))
2215 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2216 else
2217 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2218 }
2219
2220 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2221 return_status = SUCCESS;
2222
2223 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2224 return_status == FAILED ? "FAILED" : "SUCCEDED");
2225
2226 return return_status;
2227 }
2228
2229 /* PCI AER driver recovers from all correctable errors w/o
2230 * driver intervention. For uncorrectable errors PCI AER
2231 * driver calls the following device driver's callbacks
2232 *
2233 * - Fatal Errors - link_reset
2234 * - Non-Fatal Errors - driver's pci_error_detected() which
2235 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2236 *
2237 * PCI AER driver calls
2238 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2239 * returns RECOVERED or NEED_RESET if fw_hung
2240 * NEED_RESET - driver's slot_reset()
2241 * DISCONNECT - device is dead & cannot recover
2242 * RECOVERED - driver's pci_resume()
2243 */
2244 static pci_ers_result_t
2245 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2246 {
2247 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2248
2249 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2250 ha->host_no, __func__, state);
2251
2252 if (!is_aer_supported(ha))
2253 return PCI_ERS_RESULT_NONE;
2254
2255 switch (state) {
2256 case pci_channel_io_normal:
2257 clear_bit(AF_EEH_BUSY, &ha->flags);
2258 return PCI_ERS_RESULT_CAN_RECOVER;
2259 case pci_channel_io_frozen:
2260 set_bit(AF_EEH_BUSY, &ha->flags);
2261 qla4xxx_mailbox_premature_completion(ha);
2262 qla4xxx_free_irqs(ha);
2263 pci_disable_device(pdev);
2264 /* Return back all IOs */
2265 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2266 return PCI_ERS_RESULT_NEED_RESET;
2267 case pci_channel_io_perm_failure:
2268 set_bit(AF_EEH_BUSY, &ha->flags);
2269 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2270 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2271 return PCI_ERS_RESULT_DISCONNECT;
2272 }
2273 return PCI_ERS_RESULT_NEED_RESET;
2274 }
2275
2276 /**
2277 * qla4xxx_pci_mmio_enabled() gets called if
2278 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2279 * and read/write to the device still works.
2280 **/
2281 static pci_ers_result_t
2282 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2283 {
2284 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2285
2286 if (!is_aer_supported(ha))
2287 return PCI_ERS_RESULT_NONE;
2288
2289 return PCI_ERS_RESULT_RECOVERED;
2290 }
2291
2292 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2293 {
2294 uint32_t rval = QLA_ERROR;
2295 uint32_t ret = 0;
2296 int fn;
2297 struct pci_dev *other_pdev = NULL;
2298
2299 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2300
2301 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2302
2303 if (test_bit(AF_ONLINE, &ha->flags)) {
2304 clear_bit(AF_ONLINE, &ha->flags);
2305 qla4xxx_mark_all_devices_missing(ha);
2306 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2307 }
2308
2309 fn = PCI_FUNC(ha->pdev->devfn);
2310 while (fn > 0) {
2311 fn--;
2312 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2313 "func %x\n", ha->host_no, __func__, fn);
2314 /* Get the pci device given the domain, bus,
2315 * slot/function number */
2316 other_pdev =
2317 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2318 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2319 fn));
2320
2321 if (!other_pdev)
2322 continue;
2323
2324 if (atomic_read(&other_pdev->enable_cnt)) {
2325 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2326 "func in enabled state%x\n", ha->host_no,
2327 __func__, fn);
2328 pci_dev_put(other_pdev);
2329 break;
2330 }
2331 pci_dev_put(other_pdev);
2332 }
2333
2334 /* The first function on the card, the reset owner will
2335 * start & initialize the firmware. The other functions
2336 * on the card will reset the firmware context
2337 */
2338 if (!fn) {
2339 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2340 "0x%x is the owner\n", ha->host_no, __func__,
2341 ha->pdev->devfn);
2342
2343 qla4_8xxx_idc_lock(ha);
2344 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2345 QLA82XX_DEV_COLD);
2346
2347 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2348 QLA82XX_IDC_VERSION);
2349
2350 qla4_8xxx_idc_unlock(ha);
2351 clear_bit(AF_FW_RECOVERY, &ha->flags);
2352 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2353 qla4_8xxx_idc_lock(ha);
2354
2355 if (rval != QLA_SUCCESS) {
2356 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2357 "FAILED\n", ha->host_no, __func__);
2358 qla4_8xxx_clear_drv_active(ha);
2359 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2360 QLA82XX_DEV_FAILED);
2361 } else {
2362 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2363 "READY\n", ha->host_no, __func__);
2364 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2365 QLA82XX_DEV_READY);
2366 /* Clear driver state register */
2367 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2368 qla4_8xxx_set_drv_active(ha);
2369 ret = qla4xxx_request_irqs(ha);
2370 if (ret) {
2371 ql4_printk(KERN_WARNING, ha, "Failed to "
2372 "reserve interrupt %d already in use.\n",
2373 ha->pdev->irq);
2374 rval = QLA_ERROR;
2375 } else {
2376 ha->isp_ops->enable_intrs(ha);
2377 rval = QLA_SUCCESS;
2378 }
2379 }
2380 qla4_8xxx_idc_unlock(ha);
2381 } else {
2382 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2383 "the reset owner\n", ha->host_no, __func__,
2384 ha->pdev->devfn);
2385 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2386 QLA82XX_DEV_READY)) {
2387 clear_bit(AF_FW_RECOVERY, &ha->flags);
2388 rval = qla4xxx_initialize_adapter(ha,
2389 PRESERVE_DDB_LIST);
2390 if (rval == QLA_SUCCESS) {
2391 ret = qla4xxx_request_irqs(ha);
2392 if (ret) {
2393 ql4_printk(KERN_WARNING, ha, "Failed to"
2394 " reserve interrupt %d already in"
2395 " use.\n", ha->pdev->irq);
2396 rval = QLA_ERROR;
2397 } else {
2398 ha->isp_ops->enable_intrs(ha);
2399 rval = QLA_SUCCESS;
2400 }
2401 }
2402 qla4_8xxx_idc_lock(ha);
2403 qla4_8xxx_set_drv_active(ha);
2404 qla4_8xxx_idc_unlock(ha);
2405 }
2406 }
2407 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2408 return rval;
2409 }
2410
2411 static pci_ers_result_t
2412 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2413 {
2414 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2415 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2416 int rc;
2417
2418 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2419 ha->host_no, __func__);
2420
2421 if (!is_aer_supported(ha))
2422 return PCI_ERS_RESULT_NONE;
2423
2424 /* Restore the saved state of PCIe device -
2425 * BAR registers, PCI Config space, PCIX, MSI,
2426 * IOV states
2427 */
2428 pci_restore_state(pdev);
2429
2430 /* pci_restore_state() clears the saved_state flag of the device
2431 * save restored state which resets saved_state flag
2432 */
2433 pci_save_state(pdev);
2434
2435 /* Initialize device or resume if in suspended state */
2436 rc = pci_enable_device(pdev);
2437 if (rc) {
2438 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2439 "device after reset\n", ha->host_no, __func__);
2440 goto exit_slot_reset;
2441 }
2442
2443 ha->isp_ops->disable_intrs(ha);
2444
2445 if (is_qla8022(ha)) {
2446 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2447 ret = PCI_ERS_RESULT_RECOVERED;
2448 goto exit_slot_reset;
2449 } else
2450 goto exit_slot_reset;
2451 }
2452
2453 exit_slot_reset:
2454 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2455 "device after reset\n", ha->host_no, __func__, ret);
2456 return ret;
2457 }
2458
2459 static void
2460 qla4xxx_pci_resume(struct pci_dev *pdev)
2461 {
2462 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2463 int ret;
2464
2465 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2466 ha->host_no, __func__);
2467
2468 ret = qla4xxx_wait_for_hba_online(ha);
2469 if (ret != QLA_SUCCESS) {
2470 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2471 "resume I/O from slot/link_reset\n", ha->host_no,
2472 __func__);
2473 }
2474
2475 pci_cleanup_aer_uncorrect_error_status(pdev);
2476 clear_bit(AF_EEH_BUSY, &ha->flags);
2477 }
2478
2479 static struct pci_error_handlers qla4xxx_err_handler = {
2480 .error_detected = qla4xxx_pci_error_detected,
2481 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2482 .slot_reset = qla4xxx_pci_slot_reset,
2483 .resume = qla4xxx_pci_resume,
2484 };
2485
2486 static struct pci_device_id qla4xxx_pci_tbl[] = {
2487 {
2488 .vendor = PCI_VENDOR_ID_QLOGIC,
2489 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2490 .subvendor = PCI_ANY_ID,
2491 .subdevice = PCI_ANY_ID,
2492 },
2493 {
2494 .vendor = PCI_VENDOR_ID_QLOGIC,
2495 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2496 .subvendor = PCI_ANY_ID,
2497 .subdevice = PCI_ANY_ID,
2498 },
2499 {
2500 .vendor = PCI_VENDOR_ID_QLOGIC,
2501 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2502 .subvendor = PCI_ANY_ID,
2503 .subdevice = PCI_ANY_ID,
2504 },
2505 {
2506 .vendor = PCI_VENDOR_ID_QLOGIC,
2507 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2508 .subvendor = PCI_ANY_ID,
2509 .subdevice = PCI_ANY_ID,
2510 },
2511 {0, 0},
2512 };
2513 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2514
2515 static struct pci_driver qla4xxx_pci_driver = {
2516 .name = DRIVER_NAME,
2517 .id_table = qla4xxx_pci_tbl,
2518 .probe = qla4xxx_probe_adapter,
2519 .remove = qla4xxx_remove_adapter,
2520 .err_handler = &qla4xxx_err_handler,
2521 };
2522
2523 static int __init qla4xxx_module_init(void)
2524 {
2525 int ret;
2526
2527 /* Allocate cache for SRBs. */
2528 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2529 SLAB_HWCACHE_ALIGN, NULL);
2530 if (srb_cachep == NULL) {
2531 printk(KERN_ERR
2532 "%s: Unable to allocate SRB cache..."
2533 "Failing load!\n", DRIVER_NAME);
2534 ret = -ENOMEM;
2535 goto no_srp_cache;
2536 }
2537
2538 /* Derive version string. */
2539 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2540 if (ql4xextended_error_logging)
2541 strcat(qla4xxx_version_str, "-debug");
2542
2543 qla4xxx_scsi_transport =
2544 iscsi_register_transport(&qla4xxx_iscsi_transport);
2545 if (!qla4xxx_scsi_transport){
2546 ret = -ENODEV;
2547 goto release_srb_cache;
2548 }
2549
2550 ret = pci_register_driver(&qla4xxx_pci_driver);
2551 if (ret)
2552 goto unregister_transport;
2553
2554 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2555 return 0;
2556
2557 unregister_transport:
2558 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2559 release_srb_cache:
2560 kmem_cache_destroy(srb_cachep);
2561 no_srp_cache:
2562 return ret;
2563 }
2564
2565 static void __exit qla4xxx_module_exit(void)
2566 {
2567 pci_unregister_driver(&qla4xxx_pci_driver);
2568 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2569 kmem_cache_destroy(srb_cachep);
2570 }
2571
2572 module_init(qla4xxx_module_init);
2573 module_exit(qla4xxx_module_exit);
2574
2575 MODULE_AUTHOR("QLogic Corporation");
2576 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2577 MODULE_LICENSE("GPL");
2578 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
Linux kernel - Deliverables
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