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ALSA: hda - Apply Sony VAIO hweq fixup only once
[linux-2.6/kvm.git] / drivers / scsi / qla4xxx / ql4_os.c
blob0d48fb4d1044480d8743ed355019891d1d03e907
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_Host *h, struct scsi_cmnd *cmd);
83 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
84 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
85 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
86 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
87 static int qla4xxx_slave_alloc(struct scsi_device *device);
88 static int qla4xxx_slave_configure(struct scsi_device *device);
89 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
90 static void qla4xxx_scan_start(struct Scsi_Host *shost);
91
92 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
93 QLA82XX_LEGACY_INTR_CONFIG;
94
95 static struct scsi_host_template qla4xxx_driver_template = {
96 .module = THIS_MODULE,
97 .name = DRIVER_NAME,
98 .proc_name = DRIVER_NAME,
99 .queuecommand = qla4xxx_queuecommand,
100
101 .eh_abort_handler = qla4xxx_eh_abort,
102 .eh_device_reset_handler = qla4xxx_eh_device_reset,
103 .eh_target_reset_handler = qla4xxx_eh_target_reset,
104 .eh_host_reset_handler = qla4xxx_eh_host_reset,
105 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
106
107 .slave_configure = qla4xxx_slave_configure,
108 .slave_alloc = qla4xxx_slave_alloc,
109 .slave_destroy = qla4xxx_slave_destroy,
110
111 .scan_finished = iscsi_scan_finished,
112 .scan_start = qla4xxx_scan_start,
113
114 .this_id = -1,
115 .cmd_per_lun = 3,
116 .use_clustering = ENABLE_CLUSTERING,
117 .sg_tablesize = SG_ALL,
118
119 .max_sectors = 0xFFFF,
120 };
121
122 static struct iscsi_transport qla4xxx_iscsi_transport = {
123 .owner = THIS_MODULE,
124 .name = DRIVER_NAME,
125 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
126 CAP_DATA_PATH_OFFLOAD,
127 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
128 ISCSI_TARGET_NAME | ISCSI_TPGT |
129 ISCSI_TARGET_ALIAS,
130 .host_param_mask = ISCSI_HOST_HWADDRESS |
131 ISCSI_HOST_IPADDRESS |
132 ISCSI_HOST_INITIATOR_NAME,
133 .tgt_dscvr = qla4xxx_tgt_dscvr,
134 .get_conn_param = qla4xxx_conn_get_param,
135 .get_session_param = qla4xxx_sess_get_param,
136 .get_host_param = qla4xxx_host_get_param,
137 .session_recovery_timedout = qla4xxx_recovery_timedout,
138 };
139
140 static struct scsi_transport_template *qla4xxx_scsi_transport;
141
142 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
143 {
144 struct iscsi_cls_session *session;
145 struct ddb_entry *ddb_entry;
146
147 session = starget_to_session(scsi_target(sc->device));
148 ddb_entry = session->dd_data;
149
150 /* if we are not logged in then the LLD is going to clean up the cmd */
151 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
152 return BLK_EH_RESET_TIMER;
153 else
154 return BLK_EH_NOT_HANDLED;
155 }
156
157 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
158 {
159 struct ddb_entry *ddb_entry = session->dd_data;
160 struct scsi_qla_host *ha = ddb_entry->ha;
161
162 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
163 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
164
165 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout "
166 "of (%d) secs exhausted, marking device DEAD.\n",
167 ha->host_no, __func__, ddb_entry->fw_ddb_index,
168 QL4_SESS_RECOVERY_TMO));
169 }
170 }
171
172 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
173 enum iscsi_host_param param, char *buf)
174 {
175 struct scsi_qla_host *ha = to_qla_host(shost);
176 int len;
177
178 switch (param) {
179 case ISCSI_HOST_PARAM_HWADDRESS:
180 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
181 break;
182 case ISCSI_HOST_PARAM_IPADDRESS:
183 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
184 ha->ip_address[1], ha->ip_address[2],
185 ha->ip_address[3]);
186 break;
187 case ISCSI_HOST_PARAM_INITIATOR_NAME:
188 len = sprintf(buf, "%s\n", ha->name_string);
189 break;
190 default:
191 return -ENOSYS;
192 }
193
194 return len;
195 }
196
197 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
198 enum iscsi_param param, char *buf)
199 {
200 struct ddb_entry *ddb_entry = sess->dd_data;
201 int len;
202
203 switch (param) {
204 case ISCSI_PARAM_TARGET_NAME:
205 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
206 ddb_entry->iscsi_name);
207 break;
208 case ISCSI_PARAM_TPGT:
209 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
210 break;
211 case ISCSI_PARAM_TARGET_ALIAS:
212 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
213 ddb_entry->iscsi_alias);
214 break;
215 default:
216 return -ENOSYS;
217 }
218
219 return len;
220 }
221
222 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
223 enum iscsi_param param, char *buf)
224 {
225 struct iscsi_cls_session *session;
226 struct ddb_entry *ddb_entry;
227 int len;
228
229 session = iscsi_dev_to_session(conn->dev.parent);
230 ddb_entry = session->dd_data;
231
232 switch (param) {
233 case ISCSI_PARAM_CONN_PORT:
234 len = sprintf(buf, "%hu\n", ddb_entry->port);
235 break;
236 case ISCSI_PARAM_CONN_ADDRESS:
237 /* TODO: what are the ipv6 bits */
238 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
239 break;
240 default:
241 return -ENOSYS;
242 }
243
244 return len;
245 }
246
247 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
248 enum iscsi_tgt_dscvr type, uint32_t enable,
249 struct sockaddr *dst_addr)
250 {
251 struct scsi_qla_host *ha;
252 struct sockaddr_in *addr;
253 struct sockaddr_in6 *addr6;
254 int ret = 0;
255
256 ha = (struct scsi_qla_host *) shost->hostdata;
257
258 switch (type) {
259 case ISCSI_TGT_DSCVR_SEND_TARGETS:
260 if (dst_addr->sa_family == AF_INET) {
261 addr = (struct sockaddr_in *)dst_addr;
262 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
263 addr->sin_port) != QLA_SUCCESS)
264 ret = -EIO;
265 } else if (dst_addr->sa_family == AF_INET6) {
266 /*
267 * TODO: fix qla4xxx_send_tgts
268 */
269 addr6 = (struct sockaddr_in6 *)dst_addr;
270 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
271 addr6->sin6_port) != QLA_SUCCESS)
272 ret = -EIO;
273 } else
274 ret = -ENOSYS;
275 break;
276 default:
277 ret = -ENOSYS;
278 }
279 return ret;
280 }
281
282 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
283 {
284 if (!ddb_entry->sess)
285 return;
286
287 if (ddb_entry->conn) {
288 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
289 iscsi_remove_session(ddb_entry->sess);
290 }
291 iscsi_free_session(ddb_entry->sess);
292 }
293
294 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
295 {
296 int err;
297
298 ddb_entry->sess->recovery_tmo = QL4_SESS_RECOVERY_TMO;
299
300 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
301 if (err) {
302 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
303 return err;
304 }
305
306 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
307 if (!ddb_entry->conn) {
308 iscsi_remove_session(ddb_entry->sess);
309 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
310 return -ENOMEM;
311 }
312
313 /* finally ready to go */
314 iscsi_unblock_session(ddb_entry->sess);
315 return 0;
316 }
317
318 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
319 {
320 struct ddb_entry *ddb_entry;
321 struct iscsi_cls_session *sess;
322
323 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
324 sizeof(struct ddb_entry));
325 if (!sess)
326 return NULL;
327
328 ddb_entry = sess->dd_data;
329 memset(ddb_entry, 0, sizeof(*ddb_entry));
330 ddb_entry->ha = ha;
331 ddb_entry->sess = sess;
332 return ddb_entry;
333 }
334
335 static void qla4xxx_scan_start(struct Scsi_Host *shost)
336 {
337 struct scsi_qla_host *ha = shost_priv(shost);
338 struct ddb_entry *ddb_entry, *ddbtemp;
339
340 /* finish setup of sessions that were already setup in firmware */
341 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
342 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
343 qla4xxx_add_sess(ddb_entry);
344 }
345 }
346
347 /*
348 * Timer routines
349 */
350
351 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
352 unsigned long interval)
353 {
354 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
355 __func__, ha->host->host_no));
356 init_timer(&ha->timer);
357 ha->timer.expires = jiffies + interval * HZ;
358 ha->timer.data = (unsigned long)ha;
359 ha->timer.function = (void (*)(unsigned long))func;
360 add_timer(&ha->timer);
361 ha->timer_active = 1;
362 }
363
364 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
365 {
366 del_timer_sync(&ha->timer);
367 ha->timer_active = 0;
368 }
369
370 /***
371 * qla4xxx_mark_device_missing - mark a device as missing.
372 * @ha: Pointer to host adapter structure.
373 * @ddb_entry: Pointer to device database entry
374 *
375 * This routine marks a device missing and close connection.
376 **/
377 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
378 struct ddb_entry *ddb_entry)
379 {
380 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
381 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
382 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
383 ha->host_no, ddb_entry->fw_ddb_index));
384 } else
385 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
386 ddb_entry->fw_ddb_index))
387
388 iscsi_block_session(ddb_entry->sess);
389 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
390 }
391
392 /**
393 * qla4xxx_mark_all_devices_missing - mark all devices as missing.
394 * @ha: Pointer to host adapter structure.
395 *
396 * This routine marks a device missing and resets the relogin retry count.
397 **/
398 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
399 {
400 struct ddb_entry *ddb_entry, *ddbtemp;
401 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
402 qla4xxx_mark_device_missing(ha, ddb_entry);
403 }
404 }
405
406 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
407 struct ddb_entry *ddb_entry,
408 struct scsi_cmnd *cmd,
409 void (*done)(struct scsi_cmnd *))
410 {
411 struct srb *srb;
412
413 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
414 if (!srb)
415 return srb;
416
417 kref_init(&srb->srb_ref);
418 srb->ha = ha;
419 srb->ddb = ddb_entry;
420 srb->cmd = cmd;
421 srb->flags = 0;
422 CMD_SP(cmd) = (void *)srb;
423 cmd->scsi_done = done;
424
425 return srb;
426 }
427
428 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
429 {
430 struct scsi_cmnd *cmd = srb->cmd;
431
432 if (srb->flags & SRB_DMA_VALID) {
433 scsi_dma_unmap(cmd);
434 srb->flags &= ~SRB_DMA_VALID;
435 }
436 CMD_SP(cmd) = NULL;
437 }
438
439 void qla4xxx_srb_compl(struct kref *ref)
440 {
441 struct srb *srb = container_of(ref, struct srb, srb_ref);
442 struct scsi_cmnd *cmd = srb->cmd;
443 struct scsi_qla_host *ha = srb->ha;
444
445 qla4xxx_srb_free_dma(ha, srb);
446
447 mempool_free(srb, ha->srb_mempool);
448
449 cmd->scsi_done(cmd);
450 }
451
452 /**
453 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
454 * @cmd: Pointer to Linux's SCSI command structure
455 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
456 * that the command has been processed.
457 *
458 * Remarks:
459 * This routine is invoked by Linux to send a SCSI command to the driver.
460 * The mid-level driver tries to ensure that queuecommand never gets
461 * invoked concurrently with itself or the interrupt handler (although
462 * the interrupt handler may call this routine as part of request-
463 * completion handling). Unfortunely, it sometimes calls the scheduler
464 * in interrupt context which is a big NO! NO!.
465 **/
466 static int qla4xxx_queuecommand_lck(struct scsi_cmnd *cmd,
467 void (*done)(struct scsi_cmnd *))
468 {
469 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
470 struct ddb_entry *ddb_entry = cmd->device->hostdata;
471 struct iscsi_cls_session *sess = ddb_entry->sess;
472 struct srb *srb;
473 int rval;
474
475 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
476 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
477 cmd->result = DID_NO_CONNECT << 16;
478 else
479 cmd->result = DID_REQUEUE << 16;
480 goto qc_fail_command;
481 }
482
483 if (!sess) {
484 cmd->result = DID_IMM_RETRY << 16;
485 goto qc_fail_command;
486 }
487
488 rval = iscsi_session_chkready(sess);
489 if (rval) {
490 cmd->result = rval;
491 goto qc_fail_command;
492 }
493
494 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
495 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
496 cmd->result = DID_NO_CONNECT << 16;
497 goto qc_fail_command;
498 }
499 return SCSI_MLQUEUE_TARGET_BUSY;
500 }
501
502 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
503 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
504 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
505 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
506 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
507 !test_bit(AF_ONLINE, &ha->flags) ||
508 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
509 goto qc_host_busy;
510
511 spin_unlock_irq(ha->host->host_lock);
512
513 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
514 if (!srb)
515 goto qc_host_busy_lock;
516
517 rval = qla4xxx_send_command_to_isp(ha, srb);
518 if (rval != QLA_SUCCESS)
519 goto qc_host_busy_free_sp;
520
521 spin_lock_irq(ha->host->host_lock);
522 return 0;
523
524 qc_host_busy_free_sp:
525 qla4xxx_srb_free_dma(ha, srb);
526 mempool_free(srb, ha->srb_mempool);
527
528 qc_host_busy_lock:
529 spin_lock_irq(ha->host->host_lock);
530
531 qc_host_busy:
532 return SCSI_MLQUEUE_HOST_BUSY;
533
534 qc_fail_command:
535 done(cmd);
536
537 return 0;
538 }
539
540 static DEF_SCSI_QCMD(qla4xxx_queuecommand)
541
542 /**
543 * qla4xxx_mem_free - frees memory allocated to adapter
544 * @ha: Pointer to host adapter structure.
545 *
546 * Frees memory previously allocated by qla4xxx_mem_alloc
547 **/
548 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
549 {
550 if (ha->queues)
551 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
552 ha->queues_dma);
553
554 ha->queues_len = 0;
555 ha->queues = NULL;
556 ha->queues_dma = 0;
557 ha->request_ring = NULL;
558 ha->request_dma = 0;
559 ha->response_ring = NULL;
560 ha->response_dma = 0;
561 ha->shadow_regs = NULL;
562 ha->shadow_regs_dma = 0;
563
564 /* Free srb pool. */
565 if (ha->srb_mempool)
566 mempool_destroy(ha->srb_mempool);
567
568 ha->srb_mempool = NULL;
569
570 /* release io space registers */
571 if (is_qla8022(ha)) {
572 if (ha->nx_pcibase)
573 iounmap(
574 (struct device_reg_82xx __iomem *)ha->nx_pcibase);
575 } else if (ha->reg)
576 iounmap(ha->reg);
577 pci_release_regions(ha->pdev);
578 }
579
580 /**
581 * qla4xxx_mem_alloc - allocates memory for use by adapter.
582 * @ha: Pointer to host adapter structure
583 *
584 * Allocates DMA memory for request and response queues. Also allocates memory
585 * for srbs.
586 **/
587 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
588 {
589 unsigned long align;
590
591 /* Allocate contiguous block of DMA memory for queues. */
592 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
593 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
594 sizeof(struct shadow_regs) +
595 MEM_ALIGN_VALUE +
596 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
597 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
598 &ha->queues_dma, GFP_KERNEL);
599 if (ha->queues == NULL) {
600 ql4_printk(KERN_WARNING, ha,
601 "Memory Allocation failed - queues.\n");
602
603 goto mem_alloc_error_exit;
604 }
605 memset(ha->queues, 0, ha->queues_len);
606
607 /*
608 * As per RISC alignment requirements -- the bus-address must be a
609 * multiple of the request-ring size (in bytes).
610 */
611 align = 0;
612 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
613 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
614 (MEM_ALIGN_VALUE - 1));
615
616 /* Update request and response queue pointers. */
617 ha->request_dma = ha->queues_dma + align;
618 ha->request_ring = (struct queue_entry *) (ha->queues + align);
619 ha->response_dma = ha->queues_dma + align +
620 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
621 ha->response_ring = (struct queue_entry *) (ha->queues + align +
622 (REQUEST_QUEUE_DEPTH *
623 QUEUE_SIZE));
624 ha->shadow_regs_dma = ha->queues_dma + align +
625 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
626 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
627 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
628 (REQUEST_QUEUE_DEPTH *
629 QUEUE_SIZE) +
630 (RESPONSE_QUEUE_DEPTH *
631 QUEUE_SIZE));
632
633 /* Allocate memory for srb pool. */
634 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
635 mempool_free_slab, srb_cachep);
636 if (ha->srb_mempool == NULL) {
637 ql4_printk(KERN_WARNING, ha,
638 "Memory Allocation failed - SRB Pool.\n");
639
640 goto mem_alloc_error_exit;
641 }
642
643 return QLA_SUCCESS;
644
645 mem_alloc_error_exit:
646 qla4xxx_mem_free(ha);
647 return QLA_ERROR;
648 }
649
650 /**
651 * qla4_8xxx_check_fw_alive - Check firmware health
652 * @ha: Pointer to host adapter structure.
653 *
654 * Context: Interrupt
655 **/
656 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
657 {
658 uint32_t fw_heartbeat_counter, halt_status;
659
660 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
661 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
662 if (fw_heartbeat_counter == 0xffffffff) {
663 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
664 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
665 ha->host_no, __func__));
666 return;
667 }
668
669 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
670 ha->seconds_since_last_heartbeat++;
671 /* FW not alive after 2 seconds */
672 if (ha->seconds_since_last_heartbeat == 2) {
673 ha->seconds_since_last_heartbeat = 0;
674 halt_status = qla4_8xxx_rd_32(ha,
675 QLA82XX_PEG_HALT_STATUS1);
676
677 /* Since we cannot change dev_state in interrupt
678 * context, set appropriate DPC flag then wakeup
679 * DPC */
680 if (halt_status & HALT_STATUS_UNRECOVERABLE)
681 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
682 else {
683 printk("scsi%ld: %s: detect abort needed!\n",
684 ha->host_no, __func__);
685 set_bit(DPC_RESET_HA, &ha->dpc_flags);
686 }
687 qla4xxx_wake_dpc(ha);
688 qla4xxx_mailbox_premature_completion(ha);
689 }
690 } else
691 ha->seconds_since_last_heartbeat = 0;
692
693 ha->fw_heartbeat_counter = fw_heartbeat_counter;
694 }
695
696 /**
697 * qla4_8xxx_watchdog - Poll dev state
698 * @ha: Pointer to host adapter structure.
699 *
700 * Context: Interrupt
701 **/
702 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
703 {
704 uint32_t dev_state;
705
706 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
707
708 /* don't poll if reset is going on */
709 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags)) {
710 if (dev_state == QLA82XX_DEV_NEED_RESET &&
711 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
712 printk("scsi%ld: %s: HW State: NEED RESET!\n",
713 ha->host_no, __func__);
714 set_bit(DPC_RESET_HA, &ha->dpc_flags);
715 qla4xxx_wake_dpc(ha);
716 qla4xxx_mailbox_premature_completion(ha);
717 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
718 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
719 printk("scsi%ld: %s: HW State: NEED QUIES!\n",
720 ha->host_no, __func__);
721 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
722 qla4xxx_wake_dpc(ha);
723 } else {
724 /* Check firmware health */
725 qla4_8xxx_check_fw_alive(ha);
726 }
727 }
728 }
729
730 /**
731 * qla4xxx_timer - checks every second for work to do.
732 * @ha: Pointer to host adapter structure.
733 **/
734 static void qla4xxx_timer(struct scsi_qla_host *ha)
735 {
736 struct ddb_entry *ddb_entry, *dtemp;
737 int start_dpc = 0;
738 uint16_t w;
739
740 /* If we are in the middle of AER/EEH processing
741 * skip any processing and reschedule the timer
742 */
743 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
744 mod_timer(&ha->timer, jiffies + HZ);
745 return;
746 }
747
748 /* Hardware read to trigger an EEH error during mailbox waits. */
749 if (!pci_channel_offline(ha->pdev))
750 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
751
752 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags)) {
753 DEBUG2(ql4_printk(KERN_INFO, ha, "%s exited. HBA GOING AWAY\n",
754 __func__));
755 return;
756 }
757
758 if (is_qla8022(ha)) {
759 qla4_8xxx_watchdog(ha);
760 }
761
762 /* Search for relogin's to time-out and port down retry. */
763 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
764 /* Count down time between sending relogins */
765 if (adapter_up(ha) &&
766 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
767 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
768 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
769 INVALID_ENTRY) {
770 if (atomic_read(&ddb_entry->retry_relogin_timer)
771 == 0) {
772 atomic_set(&ddb_entry->
773 retry_relogin_timer,
774 INVALID_ENTRY);
775 set_bit(DPC_RELOGIN_DEVICE,
776 &ha->dpc_flags);
777 set_bit(DF_RELOGIN, &ddb_entry->flags);
778 DEBUG2(printk("scsi%ld: %s: ddb [%d]"
779 " login device\n",
780 ha->host_no, __func__,
781 ddb_entry->fw_ddb_index));
782 } else
783 atomic_dec(&ddb_entry->
784 retry_relogin_timer);
785 }
786 }
787
788 /* Wait for relogin to timeout */
789 if (atomic_read(&ddb_entry->relogin_timer) &&
790 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
791 /*
792 * If the relogin times out and the device is
793 * still NOT ONLINE then try and relogin again.
794 */
795 if (atomic_read(&ddb_entry->state) !=
796 DDB_STATE_ONLINE &&
797 ddb_entry->fw_ddb_device_state ==
798 DDB_DS_SESSION_FAILED) {
799 /* Reset retry relogin timer */
800 atomic_inc(&ddb_entry->relogin_retry_count);
801 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
802 " timed out-retrying"
803 " relogin (%d)\n",
804 ha->host_no,
805 ddb_entry->fw_ddb_index,
806 atomic_read(&ddb_entry->
807 relogin_retry_count))
808 );
809 start_dpc++;
810 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
811 "initate relogin after"
812 " %d seconds\n",
813 ha->host_no, ddb_entry->bus,
814 ddb_entry->target,
815 ddb_entry->fw_ddb_index,
816 ddb_entry->default_time2wait + 4)
817 );
818
819 atomic_set(&ddb_entry->retry_relogin_timer,
820 ddb_entry->default_time2wait + 4);
821 }
822 }
823 }
824
825 if (!is_qla8022(ha)) {
826 /* Check for heartbeat interval. */
827 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
828 ha->heartbeat_interval != 0) {
829 ha->seconds_since_last_heartbeat++;
830 if (ha->seconds_since_last_heartbeat >
831 ha->heartbeat_interval + 2)
832 set_bit(DPC_RESET_HA, &ha->dpc_flags);
833 }
834 }
835
836 /* Wakeup the dpc routine for this adapter, if needed. */
837 if ((start_dpc ||
838 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
839 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
840 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
841 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
842 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
843 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
844 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
845 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
846 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
847 test_bit(DPC_AEN, &ha->dpc_flags)) &&
848 !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
849 ha->dpc_thread) {
850 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
851 " - dpc flags = 0x%lx\n",
852 ha->host_no, __func__, ha->dpc_flags));
853 qla4xxx_wake_dpc(ha);
854 }
855
856 /* Reschedule timer thread to call us back in one second */
857 mod_timer(&ha->timer, jiffies + HZ);
858
859 DEBUG2(ha->seconds_since_last_intr++);
860 }
861
862 /**
863 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
864 * @ha: Pointer to host adapter structure.
865 *
866 * This routine stalls the driver until all outstanding commands are returned.
867 * Caller must release the Hardware Lock prior to calling this routine.
868 **/
869 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
870 {
871 uint32_t index = 0;
872 unsigned long flags;
873 struct scsi_cmnd *cmd;
874
875 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
876
877 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
878 "complete\n", WAIT_CMD_TOV));
879
880 while (!time_after_eq(jiffies, wtime)) {
881 spin_lock_irqsave(&ha->hardware_lock, flags);
882 /* Find a command that hasn't completed. */
883 for (index = 0; index < ha->host->can_queue; index++) {
884 cmd = scsi_host_find_tag(ha->host, index);
885 /*
886 * We cannot just check if the index is valid,
887 * becase if we are run from the scsi eh, then
888 * the scsi/block layer is going to prevent
889 * the tag from being released.
890 */
891 if (cmd != NULL && CMD_SP(cmd))
892 break;
893 }
894 spin_unlock_irqrestore(&ha->hardware_lock, flags);
895
896 /* If No Commands are pending, wait is complete */
897 if (index == ha->host->can_queue)
898 return QLA_SUCCESS;
899
900 msleep(1000);
901 }
902 /* If we timed out on waiting for commands to come back
903 * return ERROR. */
904 return QLA_ERROR;
905 }
906
907 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
908 {
909 uint32_t ctrl_status;
910 unsigned long flags = 0;
911
912 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
913
914 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
915 return QLA_ERROR;
916
917 spin_lock_irqsave(&ha->hardware_lock, flags);
918
919 /*
920 * If the SCSI Reset Interrupt bit is set, clear it.
921 * Otherwise, the Soft Reset won't work.
922 */
923 ctrl_status = readw(&ha->reg->ctrl_status);
924 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
925 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
926
927 /* Issue Soft Reset */
928 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
929 readl(&ha->reg->ctrl_status);
930
931 spin_unlock_irqrestore(&ha->hardware_lock, flags);
932 return QLA_SUCCESS;
933 }
934
935 /**
936 * qla4xxx_soft_reset - performs soft reset.
937 * @ha: Pointer to host adapter structure.
938 **/
939 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
940 {
941 uint32_t max_wait_time;
942 unsigned long flags = 0;
943 int status;
944 uint32_t ctrl_status;
945
946 status = qla4xxx_hw_reset(ha);
947 if (status != QLA_SUCCESS)
948 return status;
949
950 status = QLA_ERROR;
951 /* Wait until the Network Reset Intr bit is cleared */
952 max_wait_time = RESET_INTR_TOV;
953 do {
954 spin_lock_irqsave(&ha->hardware_lock, flags);
955 ctrl_status = readw(&ha->reg->ctrl_status);
956 spin_unlock_irqrestore(&ha->hardware_lock, flags);
957
958 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
959 break;
960
961 msleep(1000);
962 } while ((--max_wait_time));
963
964 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
965 DEBUG2(printk(KERN_WARNING
966 "scsi%ld: Network Reset Intr not cleared by "
967 "Network function, clearing it now!\n",
968 ha->host_no));
969 spin_lock_irqsave(&ha->hardware_lock, flags);
970 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
971 readl(&ha->reg->ctrl_status);
972 spin_unlock_irqrestore(&ha->hardware_lock, flags);
973 }
974
975 /* Wait until the firmware tells us the Soft Reset is done */
976 max_wait_time = SOFT_RESET_TOV;
977 do {
978 spin_lock_irqsave(&ha->hardware_lock, flags);
979 ctrl_status = readw(&ha->reg->ctrl_status);
980 spin_unlock_irqrestore(&ha->hardware_lock, flags);
981
982 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
983 status = QLA_SUCCESS;
984 break;
985 }
986
987 msleep(1000);
988 } while ((--max_wait_time));
989
990 /*
991 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
992 * after the soft reset has taken place.
993 */
994 spin_lock_irqsave(&ha->hardware_lock, flags);
995 ctrl_status = readw(&ha->reg->ctrl_status);
996 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
997 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
998 readl(&ha->reg->ctrl_status);
999 }
1000 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1001
1002 /* If soft reset fails then most probably the bios on other
1003 * function is also enabled.
1004 * Since the initialization is sequential the other fn
1005 * wont be able to acknowledge the soft reset.
1006 * Issue a force soft reset to workaround this scenario.
1007 */
1008 if (max_wait_time == 0) {
1009 /* Issue Force Soft Reset */
1010 spin_lock_irqsave(&ha->hardware_lock, flags);
1011 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1012 readl(&ha->reg->ctrl_status);
1013 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1014 /* Wait until the firmware tells us the Soft Reset is done */
1015 max_wait_time = SOFT_RESET_TOV;
1016 do {
1017 spin_lock_irqsave(&ha->hardware_lock, flags);
1018 ctrl_status = readw(&ha->reg->ctrl_status);
1019 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1020
1021 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1022 status = QLA_SUCCESS;
1023 break;
1024 }
1025
1026 msleep(1000);
1027 } while ((--max_wait_time));
1028 }
1029
1030 return status;
1031 }
1032
1033 /**
1034 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1035 * @ha: Pointer to host adapter structure.
1036 * @res: returned scsi status
1037 *
1038 * This routine is called just prior to a HARD RESET to return all
1039 * outstanding commands back to the Operating System.
1040 * Caller should make sure that the following locks are released
1041 * before this calling routine: Hardware lock, and io_request_lock.
1042 **/
1043 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1044 {
1045 struct srb *srb;
1046 int i;
1047 unsigned long flags;
1048
1049 spin_lock_irqsave(&ha->hardware_lock, flags);
1050 for (i = 0; i < ha->host->can_queue; i++) {
1051 srb = qla4xxx_del_from_active_array(ha, i);
1052 if (srb != NULL) {
1053 srb->cmd->result = res;
1054 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1055 }
1056 }
1057 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1058 }
1059
1060 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1061 {
1062 clear_bit(AF_ONLINE, &ha->flags);
1063
1064 /* Disable the board */
1065 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1066 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1067
1068 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1069 qla4xxx_mark_all_devices_missing(ha);
1070 clear_bit(AF_INIT_DONE, &ha->flags);
1071 }
1072
1073 /**
1074 * qla4xxx_recover_adapter - recovers adapter after a fatal error
1075 * @ha: Pointer to host adapter structure.
1076 **/
1077 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1078 {
1079 int status = QLA_ERROR;
1080 uint8_t reset_chip = 0;
1081
1082 /* Stall incoming I/O until we are done */
1083 scsi_block_requests(ha->host);
1084 clear_bit(AF_ONLINE, &ha->flags);
1085
1086 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1087
1088 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1089
1090 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1091 reset_chip = 1;
1092
1093 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1094 * do not reset adapter, jump to initialize_adapter */
1095 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1096 status = QLA_SUCCESS;
1097 goto recover_ha_init_adapter;
1098 }
1099
1100 /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1101 * from eh_host_reset or ioctl module */
1102 if (is_qla8022(ha) && !reset_chip &&
1103 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1104
1105 DEBUG2(ql4_printk(KERN_INFO, ha,
1106 "scsi%ld: %s - Performing stop_firmware...\n",
1107 ha->host_no, __func__));
1108 status = ha->isp_ops->reset_firmware(ha);
1109 if (status == QLA_SUCCESS) {
1110 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1111 qla4xxx_cmd_wait(ha);
1112 ha->isp_ops->disable_intrs(ha);
1113 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1114 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1115 } else {
1116 /* If the stop_firmware fails then
1117 * reset the entire chip */
1118 reset_chip = 1;
1119 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1120 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1121 }
1122 }
1123
1124 /* Issue full chip reset if recovering from a catastrophic error,
1125 * or if stop_firmware fails for ISP-82xx.
1126 * This is the default case for ISP-4xxx */
1127 if (!is_qla8022(ha) || reset_chip) {
1128 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1129 qla4xxx_cmd_wait(ha);
1130 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1131 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1132 DEBUG2(ql4_printk(KERN_INFO, ha,
1133 "scsi%ld: %s - Performing chip reset..\n",
1134 ha->host_no, __func__));
1135 status = ha->isp_ops->reset_chip(ha);
1136 }
1137
1138 /* Flush any pending ddb changed AENs */
1139 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1140
1141 recover_ha_init_adapter:
1142 /* Upon successful firmware/chip reset, re-initialize the adapter */
1143 if (status == QLA_SUCCESS) {
1144 /* For ISP-4xxx, force function 1 to always initialize
1145 * before function 3 to prevent both funcions from
1146 * stepping on top of the other */
1147 if (!is_qla8022(ha) && (ha->mac_index == 3))
1148 ssleep(6);
1149
1150 /* NOTE: AF_ONLINE flag set upon successful completion of
1151 * qla4xxx_initialize_adapter */
1152 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1153 }
1154
1155 /* Retry failed adapter initialization, if necessary
1156 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1157 * case to prevent ping-pong resets between functions */
1158 if (!test_bit(AF_ONLINE, &ha->flags) &&
1159 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1160 /* Adapter initialization failed, see if we can retry
1161 * resetting the ha.
1162 * Since we don't want to block the DPC for too long
1163 * with multiple resets in the same thread,
1164 * utilize DPC to retry */
1165 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1166 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1167 DEBUG2(printk("scsi%ld: recover adapter - retrying "
1168 "(%d) more times\n", ha->host_no,
1169 ha->retry_reset_ha_cnt));
1170 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1171 status = QLA_ERROR;
1172 } else {
1173 if (ha->retry_reset_ha_cnt > 0) {
1174 /* Schedule another Reset HA--DPC will retry */
1175 ha->retry_reset_ha_cnt--;
1176 DEBUG2(printk("scsi%ld: recover adapter - "
1177 "retry remaining %d\n",
1178 ha->host_no,
1179 ha->retry_reset_ha_cnt));
1180 status = QLA_ERROR;
1181 }
1182
1183 if (ha->retry_reset_ha_cnt == 0) {
1184 /* Recover adapter retries have been exhausted.
1185 * Adapter DEAD */
1186 DEBUG2(printk("scsi%ld: recover adapter "
1187 "failed - board disabled\n",
1188 ha->host_no));
1189 qla4xxx_dead_adapter_cleanup(ha);
1190 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1191 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1192 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1193 &ha->dpc_flags);
1194 status = QLA_ERROR;
1195 }
1196 }
1197 } else {
1198 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1199 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1200 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1201 }
1202
1203 ha->adapter_error_count++;
1204
1205 if (test_bit(AF_ONLINE, &ha->flags))
1206 ha->isp_ops->enable_intrs(ha);
1207
1208 scsi_unblock_requests(ha->host);
1209
1210 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1211 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1212 status == QLA_ERROR ? "FAILED" : "SUCCEDED"));
1213
1214 return status;
1215 }
1216
1217 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1218 {
1219 if (ha->dpc_thread &&
1220 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1221 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1222 queue_work(ha->dpc_thread, &ha->dpc_work);
1223 }
1224 }
1225
1226 /**
1227 * qla4xxx_do_dpc - dpc routine
1228 * @data: in our case pointer to adapter structure
1229 *
1230 * This routine is a task that is schedule by the interrupt handler
1231 * to perform the background processing for interrupts. We put it
1232 * on a task queue that is consumed whenever the scheduler runs; that's
1233 * so you can do anything (i.e. put the process to sleep etc). In fact,
1234 * the mid-level tries to sleep when it reaches the driver threshold
1235 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1236 **/
1237 static void qla4xxx_do_dpc(struct work_struct *work)
1238 {
1239 struct scsi_qla_host *ha =
1240 container_of(work, struct scsi_qla_host, dpc_work);
1241 struct ddb_entry *ddb_entry, *dtemp;
1242 int status = QLA_ERROR;
1243
1244 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1245 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1246 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1247
1248 /* Initialization not yet finished. Don't do anything yet. */
1249 if (!test_bit(AF_INIT_DONE, &ha->flags))
1250 goto do_dpc_exit;
1251
1252 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1253 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1254 ha->host_no, __func__, ha->flags));
1255 goto do_dpc_exit;
1256 }
1257
1258 /* HBA is in the process of being permanently disabled.
1259 * Don't process anything */
1260 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1261 return;
1262
1263 if (is_qla8022(ha)) {
1264 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1265 qla4_8xxx_idc_lock(ha);
1266 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1267 QLA82XX_DEV_FAILED);
1268 qla4_8xxx_idc_unlock(ha);
1269 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1270 qla4_8xxx_device_state_handler(ha);
1271 }
1272 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1273 qla4_8xxx_need_qsnt_handler(ha);
1274 }
1275 }
1276
1277 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1278 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1279 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1280 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1281 if (ql4xdontresethba) {
1282 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1283 ha->host_no, __func__));
1284 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1285 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1286 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1287 goto dpc_post_reset_ha;
1288 }
1289 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1290 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1291 qla4xxx_recover_adapter(ha);
1292
1293 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1294 uint8_t wait_time = RESET_INTR_TOV;
1295
1296 while ((readw(&ha->reg->ctrl_status) &
1297 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1298 if (--wait_time == 0)
1299 break;
1300 msleep(1000);
1301 }
1302 if (wait_time == 0)
1303 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1304 "bit not cleared-- resetting\n",
1305 ha->host_no, __func__));
1306 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1307 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1308 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1309 status = qla4xxx_recover_adapter(ha);
1310 }
1311 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1312 if (status == QLA_SUCCESS)
1313 ha->isp_ops->enable_intrs(ha);
1314 }
1315 }
1316
1317 dpc_post_reset_ha:
1318 /* ---- process AEN? --- */
1319 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1320 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1321
1322 /* ---- Get DHCP IP Address? --- */
1323 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1324 qla4xxx_get_dhcp_ip_address(ha);
1325
1326 /* ---- link change? --- */
1327 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1328 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1329 /* ---- link down? --- */
1330 list_for_each_entry_safe(ddb_entry, dtemp,
1331 &ha->ddb_list, list) {
1332 if (atomic_read(&ddb_entry->state) ==
1333 DDB_STATE_ONLINE)
1334 qla4xxx_mark_device_missing(ha,
1335 ddb_entry);
1336 }
1337 } else {
1338 /* ---- link up? --- *
1339 * F/W will auto login to all devices ONLY ONCE after
1340 * link up during driver initialization and runtime
1341 * fatal error recovery. Therefore, the driver must
1342 * manually relogin to devices when recovering from
1343 * connection failures, logouts, expired KATO, etc. */
1344
1345 list_for_each_entry_safe(ddb_entry, dtemp,
1346 &ha->ddb_list, list) {
1347 if ((atomic_read(&ddb_entry->state) ==
1348 DDB_STATE_MISSING) ||
1349 (atomic_read(&ddb_entry->state) ==
1350 DDB_STATE_DEAD)) {
1351 if (ddb_entry->fw_ddb_device_state ==
1352 DDB_DS_SESSION_ACTIVE) {
1353 atomic_set(&ddb_entry->state,
1354 DDB_STATE_ONLINE);
1355 ql4_printk(KERN_INFO, ha,
1356 "scsi%ld: %s: ddb[%d]"
1357 " marked ONLINE\n",
1358 ha->host_no, __func__,
1359 ddb_entry->fw_ddb_index);
1360
1361 iscsi_unblock_session(
1362 ddb_entry->sess);
1363 } else
1364 qla4xxx_relogin_device(
1365 ha, ddb_entry);
1366 }
1367
1368 }
1369 }
1370 }
1371
1372 /* ---- relogin device? --- */
1373 if (adapter_up(ha) &&
1374 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1375 list_for_each_entry_safe(ddb_entry, dtemp,
1376 &ha->ddb_list, list) {
1377 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1378 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1379 qla4xxx_relogin_device(ha, ddb_entry);
1380
1381 /*
1382 * If mbx cmd times out there is no point
1383 * in continuing further.
1384 * With large no of targets this can hang
1385 * the system.
1386 */
1387 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1388 printk(KERN_WARNING "scsi%ld: %s: "
1389 "need to reset hba\n",
1390 ha->host_no, __func__);
1391 break;
1392 }
1393 }
1394 }
1395
1396 do_dpc_exit:
1397 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1398 }
1399
1400 /**
1401 * qla4xxx_free_adapter - release the adapter
1402 * @ha: pointer to adapter structure
1403 **/
1404 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1405 {
1406
1407 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1408 /* Turn-off interrupts on the card. */
1409 ha->isp_ops->disable_intrs(ha);
1410 }
1411
1412 /* Remove timer thread, if present */
1413 if (ha->timer_active)
1414 qla4xxx_stop_timer(ha);
1415
1416 /* Kill the kernel thread for this host */
1417 if (ha->dpc_thread)
1418 destroy_workqueue(ha->dpc_thread);
1419
1420 /* Put firmware in known state */
1421 ha->isp_ops->reset_firmware(ha);
1422
1423 if (is_qla8022(ha)) {
1424 qla4_8xxx_idc_lock(ha);
1425 qla4_8xxx_clear_drv_active(ha);
1426 qla4_8xxx_idc_unlock(ha);
1427 }
1428
1429 /* Detach interrupts */
1430 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1431 qla4xxx_free_irqs(ha);
1432
1433 /* free extra memory */
1434 qla4xxx_mem_free(ha);
1435 }
1436
1437 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1438 {
1439 int status = 0;
1440 uint8_t revision_id;
1441 unsigned long mem_base, mem_len, db_base, db_len;
1442 struct pci_dev *pdev = ha->pdev;
1443
1444 status = pci_request_regions(pdev, DRIVER_NAME);
1445 if (status) {
1446 printk(KERN_WARNING
1447 "scsi(%ld) Failed to reserve PIO regions (%s) "
1448 "status=%d\n", ha->host_no, pci_name(pdev), status);
1449 goto iospace_error_exit;
1450 }
1451
1452 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1453 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1454 __func__, revision_id));
1455 ha->revision_id = revision_id;
1456
1457 /* remap phys address */
1458 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1459 mem_len = pci_resource_len(pdev, 0);
1460 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1461 __func__, mem_base, mem_len));
1462
1463 /* mapping of pcibase pointer */
1464 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1465 if (!ha->nx_pcibase) {
1466 printk(KERN_ERR
1467 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1468 pci_release_regions(ha->pdev);
1469 goto iospace_error_exit;
1470 }
1471
1472 /* Mapping of IO base pointer, door bell read and write pointer */
1473
1474 /* mapping of IO base pointer */
1475 ha->qla4_8xxx_reg =
1476 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1477 0xbc000 + (ha->pdev->devfn << 11));
1478
1479 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1480 db_len = pci_resource_len(pdev, 4);
1481
1482 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1483 QLA82XX_CAM_RAM_DB2);
1484
1485 return 0;
1486 iospace_error_exit:
1487 return -ENOMEM;
1488 }
1489
1490 /***
1491 * qla4xxx_iospace_config - maps registers
1492 * @ha: pointer to adapter structure
1493 *
1494 * This routines maps HBA's registers from the pci address space
1495 * into the kernel virtual address space for memory mapped i/o.
1496 **/
1497 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1498 {
1499 unsigned long pio, pio_len, pio_flags;
1500 unsigned long mmio, mmio_len, mmio_flags;
1501
1502 pio = pci_resource_start(ha->pdev, 0);
1503 pio_len = pci_resource_len(ha->pdev, 0);
1504 pio_flags = pci_resource_flags(ha->pdev, 0);
1505 if (pio_flags & IORESOURCE_IO) {
1506 if (pio_len < MIN_IOBASE_LEN) {
1507 ql4_printk(KERN_WARNING, ha,
1508 "Invalid PCI I/O region size\n");
1509 pio = 0;
1510 }
1511 } else {
1512 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1513 pio = 0;
1514 }
1515
1516 /* Use MMIO operations for all accesses. */
1517 mmio = pci_resource_start(ha->pdev, 1);
1518 mmio_len = pci_resource_len(ha->pdev, 1);
1519 mmio_flags = pci_resource_flags(ha->pdev, 1);
1520
1521 if (!(mmio_flags & IORESOURCE_MEM)) {
1522 ql4_printk(KERN_ERR, ha,
1523 "region #0 not an MMIO resource, aborting\n");
1524
1525 goto iospace_error_exit;
1526 }
1527
1528 if (mmio_len < MIN_IOBASE_LEN) {
1529 ql4_printk(KERN_ERR, ha,
1530 "Invalid PCI mem region size, aborting\n");
1531 goto iospace_error_exit;
1532 }
1533
1534 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1535 ql4_printk(KERN_WARNING, ha,
1536 "Failed to reserve PIO/MMIO regions\n");
1537
1538 goto iospace_error_exit;
1539 }
1540
1541 ha->pio_address = pio;
1542 ha->pio_length = pio_len;
1543 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1544 if (!ha->reg) {
1545 ql4_printk(KERN_ERR, ha,
1546 "cannot remap MMIO, aborting\n");
1547
1548 goto iospace_error_exit;
1549 }
1550
1551 return 0;
1552
1553 iospace_error_exit:
1554 return -ENOMEM;
1555 }
1556
1557 static struct isp_operations qla4xxx_isp_ops = {
1558 .iospace_config = qla4xxx_iospace_config,
1559 .pci_config = qla4xxx_pci_config,
1560 .disable_intrs = qla4xxx_disable_intrs,
1561 .enable_intrs = qla4xxx_enable_intrs,
1562 .start_firmware = qla4xxx_start_firmware,
1563 .intr_handler = qla4xxx_intr_handler,
1564 .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1565 .reset_chip = qla4xxx_soft_reset,
1566 .reset_firmware = qla4xxx_hw_reset,
1567 .queue_iocb = qla4xxx_queue_iocb,
1568 .complete_iocb = qla4xxx_complete_iocb,
1569 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out,
1570 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in,
1571 .get_sys_info = qla4xxx_get_sys_info,
1572 };
1573
1574 static struct isp_operations qla4_8xxx_isp_ops = {
1575 .iospace_config = qla4_8xxx_iospace_config,
1576 .pci_config = qla4_8xxx_pci_config,
1577 .disable_intrs = qla4_8xxx_disable_intrs,
1578 .enable_intrs = qla4_8xxx_enable_intrs,
1579 .start_firmware = qla4_8xxx_load_risc,
1580 .intr_handler = qla4_8xxx_intr_handler,
1581 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1582 .reset_chip = qla4_8xxx_isp_reset,
1583 .reset_firmware = qla4_8xxx_stop_firmware,
1584 .queue_iocb = qla4_8xxx_queue_iocb,
1585 .complete_iocb = qla4_8xxx_complete_iocb,
1586 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out,
1587 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in,
1588 .get_sys_info = qla4_8xxx_get_sys_info,
1589 };
1590
1591 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1592 {
1593 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1594 }
1595
1596 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1597 {
1598 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1599 }
1600
1601 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1602 {
1603 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1604 }
1605
1606 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1607 {
1608 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1609 }
1610
1611 /**
1612 * qla4xxx_probe_adapter - callback function to probe HBA
1613 * @pdev: pointer to pci_dev structure
1614 * @pci_device_id: pointer to pci_device entry
1615 *
1616 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1617 * It returns zero if successful. It also initializes all data necessary for
1618 * the driver.
1619 **/
1620 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1621 const struct pci_device_id *ent)
1622 {
1623 int ret = -ENODEV, status;
1624 struct Scsi_Host *host;
1625 struct scsi_qla_host *ha;
1626 uint8_t init_retry_count = 0;
1627 char buf[34];
1628 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1629
1630 if (pci_enable_device(pdev))
1631 return -1;
1632
1633 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1634 if (host == NULL) {
1635 printk(KERN_WARNING
1636 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1637 goto probe_disable_device;
1638 }
1639
1640 /* Clear our data area */
1641 ha = (struct scsi_qla_host *) host->hostdata;
1642 memset(ha, 0, sizeof(*ha));
1643
1644 /* Save the information from PCI BIOS. */
1645 ha->pdev = pdev;
1646 ha->host = host;
1647 ha->host_no = host->host_no;
1648
1649 pci_enable_pcie_error_reporting(pdev);
1650
1651 /* Setup Runtime configurable options */
1652 if (is_qla8022(ha)) {
1653 ha->isp_ops = &qla4_8xxx_isp_ops;
1654 rwlock_init(&ha->hw_lock);
1655 ha->qdr_sn_window = -1;
1656 ha->ddr_mn_window = -1;
1657 ha->curr_window = 255;
1658 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1659 nx_legacy_intr = &legacy_intr[ha->func_num];
1660 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1661 ha->nx_legacy_intr.tgt_status_reg =
1662 nx_legacy_intr->tgt_status_reg;
1663 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1664 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1665 } else {
1666 ha->isp_ops = &qla4xxx_isp_ops;
1667 }
1668
1669 /* Set EEH reset type to fundamental if required by hba */
1670 if (is_qla8022(ha))
1671 pdev->needs_freset = 1;
1672
1673 /* Configure PCI I/O space. */
1674 ret = ha->isp_ops->iospace_config(ha);
1675 if (ret)
1676 goto probe_failed_ioconfig;
1677
1678 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1679 pdev->device, pdev->irq, ha->reg);
1680
1681 qla4xxx_config_dma_addressing(ha);
1682
1683 /* Initialize lists and spinlocks. */
1684 INIT_LIST_HEAD(&ha->ddb_list);
1685 INIT_LIST_HEAD(&ha->free_srb_q);
1686
1687 mutex_init(&ha->mbox_sem);
1688 init_completion(&ha->mbx_intr_comp);
1689
1690 spin_lock_init(&ha->hardware_lock);
1691
1692 /* Allocate dma buffers */
1693 if (qla4xxx_mem_alloc(ha)) {
1694 ql4_printk(KERN_WARNING, ha,
1695 "[ERROR] Failed to allocate memory for adapter\n");
1696
1697 ret = -ENOMEM;
1698 goto probe_failed;
1699 }
1700
1701 if (is_qla8022(ha))
1702 (void) qla4_8xxx_get_flash_info(ha);
1703
1704 /*
1705 * Initialize the Host adapter request/response queues and
1706 * firmware
1707 * NOTE: interrupts enabled upon successful completion
1708 */
1709 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1710 while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1711 init_retry_count++ < MAX_INIT_RETRIES) {
1712 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1713 "(%d)\n", __func__, init_retry_count));
1714
1715 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
1716 continue;
1717
1718 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1719 }
1720
1721 if (!test_bit(AF_ONLINE, &ha->flags)) {
1722 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n");
1723
1724 ret = -ENODEV;
1725 goto probe_failed;
1726 }
1727
1728 host->cmd_per_lun = 3;
1729 host->max_channel = 0;
1730 host->max_lun = MAX_LUNS - 1;
1731 host->max_id = MAX_TARGETS;
1732 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1733 host->can_queue = MAX_SRBS ;
1734 host->transportt = qla4xxx_scsi_transport;
1735
1736 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1737 if (ret) {
1738 ql4_printk(KERN_WARNING, ha,
1739 "scsi_init_shared_tag_map failed\n");
1740 goto probe_failed;
1741 }
1742
1743 /* Startup the kernel thread for this host adapter. */
1744 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1745 "qla4xxx_dpc\n", __func__));
1746 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1747 ha->dpc_thread = create_singlethread_workqueue(buf);
1748 if (!ha->dpc_thread) {
1749 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n");
1750 ret = -ENODEV;
1751 goto probe_failed;
1752 }
1753 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1754
1755 /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
1756 * (which is called indirectly by qla4xxx_initialize_adapter),
1757 * so that irqs will be registered after crbinit but before
1758 * mbx_intr_enable.
1759 */
1760 if (!is_qla8022(ha)) {
1761 ret = qla4xxx_request_irqs(ha);
1762 if (ret) {
1763 ql4_printk(KERN_WARNING, ha, "Failed to reserve "
1764 "interrupt %d already in use.\n", pdev->irq);
1765 goto probe_failed;
1766 }
1767 }
1768
1769 pci_save_state(ha->pdev);
1770 ha->isp_ops->enable_intrs(ha);
1771
1772 /* Start timer thread. */
1773 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1774
1775 set_bit(AF_INIT_DONE, &ha->flags);
1776
1777 pci_set_drvdata(pdev, ha);
1778
1779 ret = scsi_add_host(host, &pdev->dev);
1780 if (ret)
1781 goto probe_failed;
1782
1783 printk(KERN_INFO
1784 " QLogic iSCSI HBA Driver version: %s\n"
1785 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1786 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1787 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1788 ha->patch_number, ha->build_number);
1789 scsi_scan_host(host);
1790 return 0;
1791
1792 probe_failed:
1793 qla4xxx_free_adapter(ha);
1794
1795 probe_failed_ioconfig:
1796 pci_disable_pcie_error_reporting(pdev);
1797 scsi_host_put(ha->host);
1798
1799 probe_disable_device:
1800 pci_disable_device(pdev);
1801
1802 return ret;
1803 }
1804
1805 /**
1806 * qla4xxx_remove_adapter - calback function to remove adapter.
1807 * @pci_dev: PCI device pointer
1808 **/
1809 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1810 {
1811 struct scsi_qla_host *ha;
1812
1813 ha = pci_get_drvdata(pdev);
1814
1815 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1816
1817 /* remove devs from iscsi_sessions to scsi_devices */
1818 qla4xxx_free_ddb_list(ha);
1819
1820 scsi_remove_host(ha->host);
1821
1822 qla4xxx_free_adapter(ha);
1823
1824 scsi_host_put(ha->host);
1825
1826 pci_disable_pcie_error_reporting(pdev);
1827 pci_disable_device(pdev);
1828 pci_set_drvdata(pdev, NULL);
1829 }
1830
1831 /**
1832 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1833 * @ha: HA context
1834 *
1835 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1836 * supported addressing method.
1837 */
1838 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1839 {
1840 int retval;
1841
1842 /* Update our PCI device dma_mask for full 64 bit mask */
1843 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1844 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1845 dev_dbg(&ha->pdev->dev,
1846 "Failed to set 64 bit PCI consistent mask; "
1847 "using 32 bit.\n");
1848 retval = pci_set_consistent_dma_mask(ha->pdev,
1849 DMA_BIT_MASK(32));
1850 }
1851 } else
1852 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1853 }
1854
1855 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1856 {
1857 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1858 struct ddb_entry *ddb = sess->dd_data;
1859
1860 sdev->hostdata = ddb;
1861 sdev->tagged_supported = 1;
1862 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1863 return 0;
1864 }
1865
1866 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1867 {
1868 sdev->tagged_supported = 1;
1869 return 0;
1870 }
1871
1872 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1873 {
1874 scsi_deactivate_tcq(sdev, 1);
1875 }
1876
1877 /**
1878 * qla4xxx_del_from_active_array - returns an active srb
1879 * @ha: Pointer to host adapter structure.
1880 * @index: index into the active_array
1881 *
1882 * This routine removes and returns the srb at the specified index
1883 **/
1884 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1885 uint32_t index)
1886 {
1887 struct srb *srb = NULL;
1888 struct scsi_cmnd *cmd = NULL;
1889
1890 cmd = scsi_host_find_tag(ha->host, index);
1891 if (!cmd)
1892 return srb;
1893
1894 srb = (struct srb *)CMD_SP(cmd);
1895 if (!srb)
1896 return srb;
1897
1898 /* update counters */
1899 if (srb->flags & SRB_DMA_VALID) {
1900 ha->req_q_count += srb->iocb_cnt;
1901 ha->iocb_cnt -= srb->iocb_cnt;
1902 if (srb->cmd)
1903 srb->cmd->host_scribble =
1904 (unsigned char *)(unsigned long) MAX_SRBS;
1905 }
1906 return srb;
1907 }
1908
1909 /**
1910 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1911 * @ha: Pointer to host adapter structure.
1912 * @cmd: Scsi Command to wait on.
1913 *
1914 * This routine waits for the command to be returned by the Firmware
1915 * for some max time.
1916 **/
1917 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1918 struct scsi_cmnd *cmd)
1919 {
1920 int done = 0;
1921 struct srb *rp;
1922 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1923 int ret = SUCCESS;
1924
1925 /* Dont wait on command if PCI error is being handled
1926 * by PCI AER driver
1927 */
1928 if (unlikely(pci_channel_offline(ha->pdev)) ||
1929 (test_bit(AF_EEH_BUSY, &ha->flags))) {
1930 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1931 ha->host_no, __func__);
1932 return ret;
1933 }
1934
1935 do {
1936 /* Checking to see if its returned to OS */
1937 rp = (struct srb *) CMD_SP(cmd);
1938 if (rp == NULL) {
1939 done++;
1940 break;
1941 }
1942
1943 msleep(2000);
1944 } while (max_wait_time--);
1945
1946 return done;
1947 }
1948
1949 /**
1950 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1951 * @ha: Pointer to host adapter structure
1952 **/
1953 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1954 {
1955 unsigned long wait_online;
1956
1957 wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
1958 while (time_before(jiffies, wait_online)) {
1959
1960 if (adapter_up(ha))
1961 return QLA_SUCCESS;
1962
1963 msleep(2000);
1964 }
1965
1966 return QLA_ERROR;
1967 }
1968
1969 /**
1970 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1971 * @ha: pointer to HBA
1972 * @t: target id
1973 * @l: lun id
1974 *
1975 * This function waits for all outstanding commands to a lun to complete. It
1976 * returns 0 if all pending commands are returned and 1 otherwise.
1977 **/
1978 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1979 struct scsi_target *stgt,
1980 struct scsi_device *sdev)
1981 {
1982 int cnt;
1983 int status = 0;
1984 struct scsi_cmnd *cmd;
1985
1986 /*
1987 * Waiting for all commands for the designated target or dev
1988 * in the active array
1989 */
1990 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1991 cmd = scsi_host_find_tag(ha->host, cnt);
1992 if (cmd && stgt == scsi_target(cmd->device) &&
1993 (!sdev || sdev == cmd->device)) {
1994 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1995 status++;
1996 break;
1997 }
1998 }
1999 }
2000 return status;
2001 }
2002
2003 /**
2004 * qla4xxx_eh_abort - callback for abort task.
2005 * @cmd: Pointer to Linux's SCSI command structure
2006 *
2007 * This routine is called by the Linux OS to abort the specified
2008 * command.
2009 **/
2010 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2011 {
2012 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2013 unsigned int id = cmd->device->id;
2014 unsigned int lun = cmd->device->lun;
2015 unsigned long serial = cmd->serial_number;
2016 unsigned long flags;
2017 struct srb *srb = NULL;
2018 int ret = SUCCESS;
2019 int wait = 0;
2020
2021 ql4_printk(KERN_INFO, ha,
2022 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2023 ha->host_no, id, lun, cmd, serial);
2024
2025 spin_lock_irqsave(&ha->hardware_lock, flags);
2026 srb = (struct srb *) CMD_SP(cmd);
2027 if (!srb) {
2028 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2029 return SUCCESS;
2030 }
2031 kref_get(&srb->srb_ref);
2032 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2033
2034 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2035 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2036 ha->host_no, id, lun));
2037 ret = FAILED;
2038 } else {
2039 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2040 ha->host_no, id, lun));
2041 wait = 1;
2042 }
2043
2044 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2045
2046 /* Wait for command to complete */
2047 if (wait) {
2048 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2049 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2050 ha->host_no, id, lun));
2051 ret = FAILED;
2052 }
2053 }
2054
2055 ql4_printk(KERN_INFO, ha,
2056 "scsi%ld:%d:%d: Abort command - %s\n",
2057 ha->host_no, id, lun, (ret == SUCCESS) ? "succeded" : "failed");
2058
2059 return ret;
2060 }
2061
2062 /**
2063 * qla4xxx_eh_device_reset - callback for target reset.
2064 * @cmd: Pointer to Linux's SCSI command structure
2065 *
2066 * This routine is called by the Linux OS to reset all luns on the
2067 * specified target.
2068 **/
2069 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2070 {
2071 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2072 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2073 int ret = FAILED, stat;
2074
2075 if (!ddb_entry)
2076 return ret;
2077
2078 ret = iscsi_block_scsi_eh(cmd);
2079 if (ret)
2080 return ret;
2081 ret = FAILED;
2082
2083 ql4_printk(KERN_INFO, ha,
2084 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2085 cmd->device->channel, cmd->device->id, cmd->device->lun);
2086
2087 DEBUG2(printk(KERN_INFO
2088 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2089 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2090 cmd, jiffies, cmd->request->timeout / HZ,
2091 ha->dpc_flags, cmd->result, cmd->allowed));
2092
2093 /* FIXME: wait for hba to go online */
2094 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2095 if (stat != QLA_SUCCESS) {
2096 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2097 goto eh_dev_reset_done;
2098 }
2099
2100 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2101 cmd->device)) {
2102 ql4_printk(KERN_INFO, ha,
2103 "DEVICE RESET FAILED - waiting for "
2104 "commands.\n");
2105 goto eh_dev_reset_done;
2106 }
2107
2108 /* Send marker. */
2109 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2110 MM_LUN_RESET) != QLA_SUCCESS)
2111 goto eh_dev_reset_done;
2112
2113 ql4_printk(KERN_INFO, ha,
2114 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2115 ha->host_no, cmd->device->channel, cmd->device->id,
2116 cmd->device->lun);
2117
2118 ret = SUCCESS;
2119
2120 eh_dev_reset_done:
2121
2122 return ret;
2123 }
2124
2125 /**
2126 * qla4xxx_eh_target_reset - callback for target reset.
2127 * @cmd: Pointer to Linux's SCSI command structure
2128 *
2129 * This routine is called by the Linux OS to reset the target.
2130 **/
2131 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2132 {
2133 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2134 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2135 int stat, ret;
2136
2137 if (!ddb_entry)
2138 return FAILED;
2139
2140 ret = iscsi_block_scsi_eh(cmd);
2141 if (ret)
2142 return ret;
2143
2144 starget_printk(KERN_INFO, scsi_target(cmd->device),
2145 "WARM TARGET RESET ISSUED.\n");
2146
2147 DEBUG2(printk(KERN_INFO
2148 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2149 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2150 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2151 ha->dpc_flags, cmd->result, cmd->allowed));
2152
2153 stat = qla4xxx_reset_target(ha, ddb_entry);
2154 if (stat != QLA_SUCCESS) {
2155 starget_printk(KERN_INFO, scsi_target(cmd->device),
2156 "WARM TARGET RESET FAILED.\n");
2157 return FAILED;
2158 }
2159
2160 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2161 NULL)) {
2162 starget_printk(KERN_INFO, scsi_target(cmd->device),
2163 "WARM TARGET DEVICE RESET FAILED - "
2164 "waiting for commands.\n");
2165 return FAILED;
2166 }
2167
2168 /* Send marker. */
2169 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2170 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2171 starget_printk(KERN_INFO, scsi_target(cmd->device),
2172 "WARM TARGET DEVICE RESET FAILED - "
2173 "marker iocb failed.\n");
2174 return FAILED;
2175 }
2176
2177 starget_printk(KERN_INFO, scsi_target(cmd->device),
2178 "WARM TARGET RESET SUCCEEDED.\n");
2179 return SUCCESS;
2180 }
2181
2182 /**
2183 * qla4xxx_eh_host_reset - kernel callback
2184 * @cmd: Pointer to Linux's SCSI command structure
2185 *
2186 * This routine is invoked by the Linux kernel to perform fatal error
2187 * recovery on the specified adapter.
2188 **/
2189 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2190 {
2191 int return_status = FAILED;
2192 struct scsi_qla_host *ha;
2193
2194 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2195
2196 if (ql4xdontresethba) {
2197 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2198 ha->host_no, __func__));
2199 return FAILED;
2200 }
2201
2202 ql4_printk(KERN_INFO, ha,
2203 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2204 cmd->device->channel, cmd->device->id, cmd->device->lun);
2205
2206 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2207 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2208 "DEAD.\n", ha->host_no, cmd->device->channel,
2209 __func__));
2210
2211 return FAILED;
2212 }
2213
2214 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2215 if (is_qla8022(ha))
2216 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2217 else
2218 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2219 }
2220
2221 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2222 return_status = SUCCESS;
2223
2224 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2225 return_status == FAILED ? "FAILED" : "SUCCEDED");
2226
2227 return return_status;
2228 }
2229
2230 /* PCI AER driver recovers from all correctable errors w/o
2231 * driver intervention. For uncorrectable errors PCI AER
2232 * driver calls the following device driver's callbacks
2233 *
2234 * - Fatal Errors - link_reset
2235 * - Non-Fatal Errors - driver's pci_error_detected() which
2236 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2237 *
2238 * PCI AER driver calls
2239 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2240 * returns RECOVERED or NEED_RESET if fw_hung
2241 * NEED_RESET - driver's slot_reset()
2242 * DISCONNECT - device is dead & cannot recover
2243 * RECOVERED - driver's pci_resume()
2244 */
2245 static pci_ers_result_t
2246 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2247 {
2248 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2249
2250 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2251 ha->host_no, __func__, state);
2252
2253 if (!is_aer_supported(ha))
2254 return PCI_ERS_RESULT_NONE;
2255
2256 switch (state) {
2257 case pci_channel_io_normal:
2258 clear_bit(AF_EEH_BUSY, &ha->flags);
2259 return PCI_ERS_RESULT_CAN_RECOVER;
2260 case pci_channel_io_frozen:
2261 set_bit(AF_EEH_BUSY, &ha->flags);
2262 qla4xxx_mailbox_premature_completion(ha);
2263 qla4xxx_free_irqs(ha);
2264 pci_disable_device(pdev);
2265 /* Return back all IOs */
2266 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2267 return PCI_ERS_RESULT_NEED_RESET;
2268 case pci_channel_io_perm_failure:
2269 set_bit(AF_EEH_BUSY, &ha->flags);
2270 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2271 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2272 return PCI_ERS_RESULT_DISCONNECT;
2273 }
2274 return PCI_ERS_RESULT_NEED_RESET;
2275 }
2276
2277 /**
2278 * qla4xxx_pci_mmio_enabled() gets called if
2279 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2280 * and read/write to the device still works.
2281 **/
2282 static pci_ers_result_t
2283 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2284 {
2285 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2286
2287 if (!is_aer_supported(ha))
2288 return PCI_ERS_RESULT_NONE;
2289
2290 return PCI_ERS_RESULT_RECOVERED;
2291 }
2292
2293 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2294 {
2295 uint32_t rval = QLA_ERROR;
2296 uint32_t ret = 0;
2297 int fn;
2298 struct pci_dev *other_pdev = NULL;
2299
2300 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2301
2302 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2303
2304 if (test_bit(AF_ONLINE, &ha->flags)) {
2305 clear_bit(AF_ONLINE, &ha->flags);
2306 qla4xxx_mark_all_devices_missing(ha);
2307 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2308 }
2309
2310 fn = PCI_FUNC(ha->pdev->devfn);
2311 while (fn > 0) {
2312 fn--;
2313 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2314 "func %x\n", ha->host_no, __func__, fn);
2315 /* Get the pci device given the domain, bus,
2316 * slot/function number */
2317 other_pdev =
2318 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2319 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2320 fn));
2321
2322 if (!other_pdev)
2323 continue;
2324
2325 if (atomic_read(&other_pdev->enable_cnt)) {
2326 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2327 "func in enabled state%x\n", ha->host_no,
2328 __func__, fn);
2329 pci_dev_put(other_pdev);
2330 break;
2331 }
2332 pci_dev_put(other_pdev);
2333 }
2334
2335 /* The first function on the card, the reset owner will
2336 * start & initialize the firmware. The other functions
2337 * on the card will reset the firmware context
2338 */
2339 if (!fn) {
2340 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2341 "0x%x is the owner\n", ha->host_no, __func__,
2342 ha->pdev->devfn);
2343
2344 qla4_8xxx_idc_lock(ha);
2345 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2346 QLA82XX_DEV_COLD);
2347
2348 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2349 QLA82XX_IDC_VERSION);
2350
2351 qla4_8xxx_idc_unlock(ha);
2352 clear_bit(AF_FW_RECOVERY, &ha->flags);
2353 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2354 qla4_8xxx_idc_lock(ha);
2355
2356 if (rval != QLA_SUCCESS) {
2357 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2358 "FAILED\n", ha->host_no, __func__);
2359 qla4_8xxx_clear_drv_active(ha);
2360 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2361 QLA82XX_DEV_FAILED);
2362 } else {
2363 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2364 "READY\n", ha->host_no, __func__);
2365 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2366 QLA82XX_DEV_READY);
2367 /* Clear driver state register */
2368 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2369 qla4_8xxx_set_drv_active(ha);
2370 ret = qla4xxx_request_irqs(ha);
2371 if (ret) {
2372 ql4_printk(KERN_WARNING, ha, "Failed to "
2373 "reserve interrupt %d already in use.\n",
2374 ha->pdev->irq);
2375 rval = QLA_ERROR;
2376 } else {
2377 ha->isp_ops->enable_intrs(ha);
2378 rval = QLA_SUCCESS;
2379 }
2380 }
2381 qla4_8xxx_idc_unlock(ha);
2382 } else {
2383 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2384 "the reset owner\n", ha->host_no, __func__,
2385 ha->pdev->devfn);
2386 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2387 QLA82XX_DEV_READY)) {
2388 clear_bit(AF_FW_RECOVERY, &ha->flags);
2389 rval = qla4xxx_initialize_adapter(ha,
2390 PRESERVE_DDB_LIST);
2391 if (rval == QLA_SUCCESS) {
2392 ret = qla4xxx_request_irqs(ha);
2393 if (ret) {
2394 ql4_printk(KERN_WARNING, ha, "Failed to"
2395 " reserve interrupt %d already in"
2396 " use.\n", ha->pdev->irq);
2397 rval = QLA_ERROR;
2398 } else {
2399 ha->isp_ops->enable_intrs(ha);
2400 rval = QLA_SUCCESS;
2401 }
2402 }
2403 qla4_8xxx_idc_lock(ha);
2404 qla4_8xxx_set_drv_active(ha);
2405 qla4_8xxx_idc_unlock(ha);
2406 }
2407 }
2408 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2409 return rval;
2410 }
2411
2412 static pci_ers_result_t
2413 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2414 {
2415 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2416 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2417 int rc;
2418
2419 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2420 ha->host_no, __func__);
2421
2422 if (!is_aer_supported(ha))
2423 return PCI_ERS_RESULT_NONE;
2424
2425 /* Restore the saved state of PCIe device -
2426 * BAR registers, PCI Config space, PCIX, MSI,
2427 * IOV states
2428 */
2429 pci_restore_state(pdev);
2430
2431 /* pci_restore_state() clears the saved_state flag of the device
2432 * save restored state which resets saved_state flag
2433 */
2434 pci_save_state(pdev);
2435
2436 /* Initialize device or resume if in suspended state */
2437 rc = pci_enable_device(pdev);
2438 if (rc) {
2439 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2440 "device after reset\n", ha->host_no, __func__);
2441 goto exit_slot_reset;
2442 }
2443
2444 ha->isp_ops->disable_intrs(ha);
2445
2446 if (is_qla8022(ha)) {
2447 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2448 ret = PCI_ERS_RESULT_RECOVERED;
2449 goto exit_slot_reset;
2450 } else
2451 goto exit_slot_reset;
2452 }
2453
2454 exit_slot_reset:
2455 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2456 "device after reset\n", ha->host_no, __func__, ret);
2457 return ret;
2458 }
2459
2460 static void
2461 qla4xxx_pci_resume(struct pci_dev *pdev)
2462 {
2463 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2464 int ret;
2465
2466 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2467 ha->host_no, __func__);
2468
2469 ret = qla4xxx_wait_for_hba_online(ha);
2470 if (ret != QLA_SUCCESS) {
2471 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2472 "resume I/O from slot/link_reset\n", ha->host_no,
2473 __func__);
2474 }
2475
2476 pci_cleanup_aer_uncorrect_error_status(pdev);
2477 clear_bit(AF_EEH_BUSY, &ha->flags);
2478 }
2479
2480 static struct pci_error_handlers qla4xxx_err_handler = {
2481 .error_detected = qla4xxx_pci_error_detected,
2482 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2483 .slot_reset = qla4xxx_pci_slot_reset,
2484 .resume = qla4xxx_pci_resume,
2485 };
2486
2487 static struct pci_device_id qla4xxx_pci_tbl[] = {
2488 {
2489 .vendor = PCI_VENDOR_ID_QLOGIC,
2490 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2491 .subvendor = PCI_ANY_ID,
2492 .subdevice = PCI_ANY_ID,
2493 },
2494 {
2495 .vendor = PCI_VENDOR_ID_QLOGIC,
2496 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2497 .subvendor = PCI_ANY_ID,
2498 .subdevice = PCI_ANY_ID,
2499 },
2500 {
2501 .vendor = PCI_VENDOR_ID_QLOGIC,
2502 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2503 .subvendor = PCI_ANY_ID,
2504 .subdevice = PCI_ANY_ID,
2505 },
2506 {
2507 .vendor = PCI_VENDOR_ID_QLOGIC,
2508 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2509 .subvendor = PCI_ANY_ID,
2510 .subdevice = PCI_ANY_ID,
2511 },
2512 {0, 0},
2513 };
2514 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2515
2516 static struct pci_driver qla4xxx_pci_driver = {
2517 .name = DRIVER_NAME,
2518 .id_table = qla4xxx_pci_tbl,
2519 .probe = qla4xxx_probe_adapter,
2520 .remove = qla4xxx_remove_adapter,
2521 .err_handler = &qla4xxx_err_handler,
2522 };
2523
2524 static int __init qla4xxx_module_init(void)
2525 {
2526 int ret;
2527
2528 /* Allocate cache for SRBs. */
2529 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2530 SLAB_HWCACHE_ALIGN, NULL);
2531 if (srb_cachep == NULL) {
2532 printk(KERN_ERR
2533 "%s: Unable to allocate SRB cache..."
2534 "Failing load!\n", DRIVER_NAME);
2535 ret = -ENOMEM;
2536 goto no_srp_cache;
2537 }
2538
2539 /* Derive version string. */
2540 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2541 if (ql4xextended_error_logging)
2542 strcat(qla4xxx_version_str, "-debug");
2543
2544 qla4xxx_scsi_transport =
2545 iscsi_register_transport(&qla4xxx_iscsi_transport);
2546 if (!qla4xxx_scsi_transport){
2547 ret = -ENODEV;
2548 goto release_srb_cache;
2549 }
2550
2551 ret = pci_register_driver(&qla4xxx_pci_driver);
2552 if (ret)
2553 goto unregister_transport;
2554
2555 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2556 return 0;
2557
2558 unregister_transport:
2559 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2560 release_srb_cache:
2561 kmem_cache_destroy(srb_cachep);
2562 no_srp_cache:
2563 return ret;
2564 }
2565
2566 static void __exit qla4xxx_module_exit(void)
2567 {
2568 pci_unregister_driver(&qla4xxx_pci_driver);
2569 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2570 kmem_cache_destroy(srb_cachep);
2571 }
2572
2573 module_init(qla4xxx_module_init);
2574 module_exit(qla4xxx_module_exit);
2575
2576 MODULE_AUTHOR("QLogic Corporation");
2577 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2578 MODULE_LICENSE("GPL");
2579 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
kernel-based virtual machine