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RT-AC56 3.0.0.4.374.37 core
[tomato.git] / release / src-rt-6.x.4708 / linux / linux-2.6.36 / drivers / scsi / qla4xxx / ql4_os.c
blobdfd68b9a212d98fd461d1374df818bc6a5e40c22
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 qla4xxx_wake_dpc(ha);
172 }
173 }
174
175 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
176 enum iscsi_host_param param, char *buf)
177 {
178 struct scsi_qla_host *ha = to_qla_host(shost);
179 int len;
180
181 switch (param) {
182 case ISCSI_HOST_PARAM_HWADDRESS:
183 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
184 break;
185 case ISCSI_HOST_PARAM_IPADDRESS:
186 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
187 ha->ip_address[1], ha->ip_address[2],
188 ha->ip_address[3]);
189 break;
190 case ISCSI_HOST_PARAM_INITIATOR_NAME:
191 len = sprintf(buf, "%s\n", ha->name_string);
192 break;
193 default:
194 return -ENOSYS;
195 }
196
197 return len;
198 }
199
200 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
201 enum iscsi_param param, char *buf)
202 {
203 struct ddb_entry *ddb_entry = sess->dd_data;
204 int len;
205
206 switch (param) {
207 case ISCSI_PARAM_TARGET_NAME:
208 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
209 ddb_entry->iscsi_name);
210 break;
211 case ISCSI_PARAM_TPGT:
212 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
213 break;
214 case ISCSI_PARAM_TARGET_ALIAS:
215 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
216 ddb_entry->iscsi_alias);
217 break;
218 default:
219 return -ENOSYS;
220 }
221
222 return len;
223 }
224
225 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
226 enum iscsi_param param, char *buf)
227 {
228 struct iscsi_cls_session *session;
229 struct ddb_entry *ddb_entry;
230 int len;
231
232 session = iscsi_dev_to_session(conn->dev.parent);
233 ddb_entry = session->dd_data;
234
235 switch (param) {
236 case ISCSI_PARAM_CONN_PORT:
237 len = sprintf(buf, "%hu\n", ddb_entry->port);
238 break;
239 case ISCSI_PARAM_CONN_ADDRESS:
240 /* TODO: what are the ipv6 bits */
241 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
242 break;
243 default:
244 return -ENOSYS;
245 }
246
247 return len;
248 }
249
250 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
251 enum iscsi_tgt_dscvr type, uint32_t enable,
252 struct sockaddr *dst_addr)
253 {
254 struct scsi_qla_host *ha;
255 struct sockaddr_in *addr;
256 struct sockaddr_in6 *addr6;
257 int ret = 0;
258
259 ha = (struct scsi_qla_host *) shost->hostdata;
260
261 switch (type) {
262 case ISCSI_TGT_DSCVR_SEND_TARGETS:
263 if (dst_addr->sa_family == AF_INET) {
264 addr = (struct sockaddr_in *)dst_addr;
265 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
266 addr->sin_port) != QLA_SUCCESS)
267 ret = -EIO;
268 } else if (dst_addr->sa_family == AF_INET6) {
269 /*
270 * TODO: fix qla4xxx_send_tgts
271 */
272 addr6 = (struct sockaddr_in6 *)dst_addr;
273 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
274 addr6->sin6_port) != QLA_SUCCESS)
275 ret = -EIO;
276 } else
277 ret = -ENOSYS;
278 break;
279 default:
280 ret = -ENOSYS;
281 }
282 return ret;
283 }
284
285 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
286 {
287 if (!ddb_entry->sess)
288 return;
289
290 if (ddb_entry->conn) {
291 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
292 iscsi_remove_session(ddb_entry->sess);
293 }
294 iscsi_free_session(ddb_entry->sess);
295 }
296
297 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
298 {
299 int err;
300
301 ddb_entry->sess->recovery_tmo = QL4_SESS_RECOVERY_TMO;
302
303 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
304 if (err) {
305 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
306 return err;
307 }
308
309 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
310 if (!ddb_entry->conn) {
311 iscsi_remove_session(ddb_entry->sess);
312 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
313 return -ENOMEM;
314 }
315
316 /* finally ready to go */
317 iscsi_unblock_session(ddb_entry->sess);
318 return 0;
319 }
320
321 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
322 {
323 struct ddb_entry *ddb_entry;
324 struct iscsi_cls_session *sess;
325
326 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
327 sizeof(struct ddb_entry));
328 if (!sess)
329 return NULL;
330
331 ddb_entry = sess->dd_data;
332 memset(ddb_entry, 0, sizeof(*ddb_entry));
333 ddb_entry->ha = ha;
334 ddb_entry->sess = sess;
335 return ddb_entry;
336 }
337
338 static void qla4xxx_scan_start(struct Scsi_Host *shost)
339 {
340 struct scsi_qla_host *ha = shost_priv(shost);
341 struct ddb_entry *ddb_entry, *ddbtemp;
342
343 /* finish setup of sessions that were already setup in firmware */
344 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
345 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
346 qla4xxx_add_sess(ddb_entry);
347 }
348 }
349
350 /*
351 * Timer routines
352 */
353
354 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
355 unsigned long interval)
356 {
357 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
358 __func__, ha->host->host_no));
359 init_timer(&ha->timer);
360 ha->timer.expires = jiffies + interval * HZ;
361 ha->timer.data = (unsigned long)ha;
362 ha->timer.function = (void (*)(unsigned long))func;
363 add_timer(&ha->timer);
364 ha->timer_active = 1;
365 }
366
367 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
368 {
369 del_timer_sync(&ha->timer);
370 ha->timer_active = 0;
371 }
372
373 /***
374 * qla4xxx_mark_device_missing - mark a device as missing.
375 * @ha: Pointer to host adapter structure.
376 * @ddb_entry: Pointer to device database entry
377 *
378 * This routine marks a device missing and close connection.
379 **/
380 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
381 struct ddb_entry *ddb_entry)
382 {
383 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
384 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
385 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
386 ha->host_no, ddb_entry->fw_ddb_index));
387 } else
388 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
389 ddb_entry->fw_ddb_index))
390
391 iscsi_block_session(ddb_entry->sess);
392 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
393 }
394
395 /**
396 * qla4xxx_mark_all_devices_missing - mark all devices as missing.
397 * @ha: Pointer to host adapter structure.
398 *
399 * This routine marks a device missing and resets the relogin retry count.
400 **/
401 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
402 {
403 struct ddb_entry *ddb_entry, *ddbtemp;
404 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
405 qla4xxx_mark_device_missing(ha, ddb_entry);
406 }
407 }
408
409 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
410 struct ddb_entry *ddb_entry,
411 struct scsi_cmnd *cmd,
412 void (*done)(struct scsi_cmnd *))
413 {
414 struct srb *srb;
415
416 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
417 if (!srb)
418 return srb;
419
420 kref_init(&srb->srb_ref);
421 srb->ha = ha;
422 srb->ddb = ddb_entry;
423 srb->cmd = cmd;
424 srb->flags = 0;
425 CMD_SP(cmd) = (void *)srb;
426 cmd->scsi_done = done;
427
428 return srb;
429 }
430
431 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
432 {
433 struct scsi_cmnd *cmd = srb->cmd;
434
435 if (srb->flags & SRB_DMA_VALID) {
436 scsi_dma_unmap(cmd);
437 srb->flags &= ~SRB_DMA_VALID;
438 }
439 CMD_SP(cmd) = NULL;
440 }
441
442 void qla4xxx_srb_compl(struct kref *ref)
443 {
444 struct srb *srb = container_of(ref, struct srb, srb_ref);
445 struct scsi_cmnd *cmd = srb->cmd;
446 struct scsi_qla_host *ha = srb->ha;
447
448 qla4xxx_srb_free_dma(ha, srb);
449
450 mempool_free(srb, ha->srb_mempool);
451
452 cmd->scsi_done(cmd);
453 }
454
455 /**
456 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
457 * @cmd: Pointer to Linux's SCSI command structure
458 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
459 * that the command has been processed.
460 *
461 * Remarks:
462 * This routine is invoked by Linux to send a SCSI command to the driver.
463 * The mid-level driver tries to ensure that queuecommand never gets
464 * invoked concurrently with itself or the interrupt handler (although
465 * the interrupt handler may call this routine as part of request-
466 * completion handling). Unfortunely, it sometimes calls the scheduler
467 * in interrupt context which is a big NO! NO!.
468 **/
469 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
470 void (*done)(struct scsi_cmnd *))
471 {
472 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
473 struct ddb_entry *ddb_entry = cmd->device->hostdata;
474 struct iscsi_cls_session *sess = ddb_entry->sess;
475 struct srb *srb;
476 int rval;
477
478 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
479 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
480 cmd->result = DID_NO_CONNECT << 16;
481 else
482 cmd->result = DID_REQUEUE << 16;
483 goto qc_fail_command;
484 }
485
486 if (!sess) {
487 cmd->result = DID_IMM_RETRY << 16;
488 goto qc_fail_command;
489 }
490
491 rval = iscsi_session_chkready(sess);
492 if (rval) {
493 cmd->result = rval;
494 goto qc_fail_command;
495 }
496
497 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
498 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
499 cmd->result = DID_NO_CONNECT << 16;
500 goto qc_fail_command;
501 }
502 return SCSI_MLQUEUE_TARGET_BUSY;
503 }
504
505 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
506 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
507 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
508 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
509 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
510 !test_bit(AF_ONLINE, &ha->flags) ||
511 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
512 goto qc_host_busy;
513
514 spin_unlock_irq(ha->host->host_lock);
515
516 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
517 if (!srb)
518 goto qc_host_busy_lock;
519
520 rval = qla4xxx_send_command_to_isp(ha, srb);
521 if (rval != QLA_SUCCESS)
522 goto qc_host_busy_free_sp;
523
524 spin_lock_irq(ha->host->host_lock);
525 return 0;
526
527 qc_host_busy_free_sp:
528 qla4xxx_srb_free_dma(ha, srb);
529 mempool_free(srb, ha->srb_mempool);
530
531 qc_host_busy_lock:
532 spin_lock_irq(ha->host->host_lock);
533
534 qc_host_busy:
535 return SCSI_MLQUEUE_HOST_BUSY;
536
537 qc_fail_command:
538 done(cmd);
539
540 return 0;
541 }
542
543 /**
544 * qla4xxx_mem_free - frees memory allocated to adapter
545 * @ha: Pointer to host adapter structure.
546 *
547 * Frees memory previously allocated by qla4xxx_mem_alloc
548 **/
549 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
550 {
551 if (ha->queues)
552 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
553 ha->queues_dma);
554
555 ha->queues_len = 0;
556 ha->queues = NULL;
557 ha->queues_dma = 0;
558 ha->request_ring = NULL;
559 ha->request_dma = 0;
560 ha->response_ring = NULL;
561 ha->response_dma = 0;
562 ha->shadow_regs = NULL;
563 ha->shadow_regs_dma = 0;
564
565 /* Free srb pool. */
566 if (ha->srb_mempool)
567 mempool_destroy(ha->srb_mempool);
568
569 ha->srb_mempool = NULL;
570
571 /* release io space registers */
572 if (is_qla8022(ha)) {
573 if (ha->nx_pcibase)
574 iounmap(
575 (struct device_reg_82xx __iomem *)ha->nx_pcibase);
576
577 if (ha->nx_db_wr_ptr)
578 iounmap(
579 (struct device_reg_82xx __iomem *)ha->nx_db_wr_ptr);
580 } else if (ha->reg)
581 iounmap(ha->reg);
582 pci_release_regions(ha->pdev);
583 }
584
585 /**
586 * qla4xxx_mem_alloc - allocates memory for use by adapter.
587 * @ha: Pointer to host adapter structure
588 *
589 * Allocates DMA memory for request and response queues. Also allocates memory
590 * for srbs.
591 **/
592 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
593 {
594 unsigned long align;
595
596 /* Allocate contiguous block of DMA memory for queues. */
597 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
598 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
599 sizeof(struct shadow_regs) +
600 MEM_ALIGN_VALUE +
601 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
602 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
603 &ha->queues_dma, GFP_KERNEL);
604 if (ha->queues == NULL) {
605 ql4_printk(KERN_WARNING, ha,
606 "Memory Allocation failed - queues.\n");
607
608 goto mem_alloc_error_exit;
609 }
610 memset(ha->queues, 0, ha->queues_len);
611
612 /*
613 * As per RISC alignment requirements -- the bus-address must be a
614 * multiple of the request-ring size (in bytes).
615 */
616 align = 0;
617 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
618 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
619 (MEM_ALIGN_VALUE - 1));
620
621 /* Update request and response queue pointers. */
622 ha->request_dma = ha->queues_dma + align;
623 ha->request_ring = (struct queue_entry *) (ha->queues + align);
624 ha->response_dma = ha->queues_dma + align +
625 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
626 ha->response_ring = (struct queue_entry *) (ha->queues + align +
627 (REQUEST_QUEUE_DEPTH *
628 QUEUE_SIZE));
629 ha->shadow_regs_dma = ha->queues_dma + align +
630 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
631 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
632 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
633 (REQUEST_QUEUE_DEPTH *
634 QUEUE_SIZE) +
635 (RESPONSE_QUEUE_DEPTH *
636 QUEUE_SIZE));
637
638 /* Allocate memory for srb pool. */
639 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
640 mempool_free_slab, srb_cachep);
641 if (ha->srb_mempool == NULL) {
642 ql4_printk(KERN_WARNING, ha,
643 "Memory Allocation failed - SRB Pool.\n");
644
645 goto mem_alloc_error_exit;
646 }
647
648 return QLA_SUCCESS;
649
650 mem_alloc_error_exit:
651 qla4xxx_mem_free(ha);
652 return QLA_ERROR;
653 }
654
655 /**
656 * qla4_8xxx_check_fw_alive - Check firmware health
657 * @ha: Pointer to host adapter structure.
658 *
659 * Context: Interrupt
660 **/
661 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
662 {
663 uint32_t fw_heartbeat_counter, halt_status;
664
665 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
666 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
667 if (fw_heartbeat_counter == 0xffffffff) {
668 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
669 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
670 ha->host_no, __func__));
671 return;
672 }
673
674 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
675 ha->seconds_since_last_heartbeat++;
676 /* FW not alive after 2 seconds */
677 if (ha->seconds_since_last_heartbeat == 2) {
678 ha->seconds_since_last_heartbeat = 0;
679 halt_status = qla4_8xxx_rd_32(ha,
680 QLA82XX_PEG_HALT_STATUS1);
681
682 /* Since we cannot change dev_state in interrupt
683 * context, set appropriate DPC flag then wakeup
684 * DPC */
685 if (halt_status & HALT_STATUS_UNRECOVERABLE)
686 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
687 else {
688 printk("scsi%ld: %s: detect abort needed!\n",
689 ha->host_no, __func__);
690 set_bit(DPC_RESET_HA, &ha->dpc_flags);
691 }
692 qla4xxx_wake_dpc(ha);
693 qla4xxx_mailbox_premature_completion(ha);
694 }
695 }
696 ha->fw_heartbeat_counter = fw_heartbeat_counter;
697 }
698
699 /**
700 * qla4_8xxx_watchdog - Poll dev state
701 * @ha: Pointer to host adapter structure.
702 *
703 * Context: Interrupt
704 **/
705 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
706 {
707 uint32_t dev_state;
708
709 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
710
711 /* don't poll if reset is going on */
712 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags)) {
713 if (dev_state == QLA82XX_DEV_NEED_RESET &&
714 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
715 printk("scsi%ld: %s: HW State: NEED RESET!\n",
716 ha->host_no, __func__);
717 set_bit(DPC_RESET_HA, &ha->dpc_flags);
718 qla4xxx_wake_dpc(ha);
719 qla4xxx_mailbox_premature_completion(ha);
720 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
721 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
722 printk("scsi%ld: %s: HW State: NEED QUIES!\n",
723 ha->host_no, __func__);
724 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
725 qla4xxx_wake_dpc(ha);
726 } else {
727 /* Check firmware health */
728 qla4_8xxx_check_fw_alive(ha);
729 }
730 }
731 }
732
733 /**
734 * qla4xxx_timer - checks every second for work to do.
735 * @ha: Pointer to host adapter structure.
736 **/
737 static void qla4xxx_timer(struct scsi_qla_host *ha)
738 {
739 struct ddb_entry *ddb_entry, *dtemp;
740 int start_dpc = 0;
741 uint16_t w;
742
743 /* If we are in the middle of AER/EEH processing
744 * skip any processing and reschedule the timer
745 */
746 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
747 mod_timer(&ha->timer, jiffies + HZ);
748 return;
749 }
750
751 /* Hardware read to trigger an EEH error during mailbox waits. */
752 if (!pci_channel_offline(ha->pdev))
753 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
754
755 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags)) {
756 DEBUG2(ql4_printk(KERN_INFO, ha, "%s exited. HBA GOING AWAY\n",
757 __func__));
758 return;
759 }
760
761 if (is_qla8022(ha)) {
762 qla4_8xxx_watchdog(ha);
763 }
764
765 /* Search for relogin's to time-out and port down retry. */
766 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
767 /* Count down time between sending relogins */
768 if (adapter_up(ha) &&
769 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
770 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
771 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
772 INVALID_ENTRY) {
773 if (atomic_read(&ddb_entry->retry_relogin_timer)
774 == 0) {
775 atomic_set(&ddb_entry->
776 retry_relogin_timer,
777 INVALID_ENTRY);
778 set_bit(DPC_RELOGIN_DEVICE,
779 &ha->dpc_flags);
780 set_bit(DF_RELOGIN, &ddb_entry->flags);
781 DEBUG2(printk("scsi%ld: %s: ddb [%d]"
782 " login device\n",
783 ha->host_no, __func__,
784 ddb_entry->fw_ddb_index));
785 } else
786 atomic_dec(&ddb_entry->
787 retry_relogin_timer);
788 }
789 }
790
791 /* Wait for relogin to timeout */
792 if (atomic_read(&ddb_entry->relogin_timer) &&
793 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
794 /*
795 * If the relogin times out and the device is
796 * still NOT ONLINE then try and relogin again.
797 */
798 if (atomic_read(&ddb_entry->state) !=
799 DDB_STATE_ONLINE &&
800 ddb_entry->fw_ddb_device_state ==
801 DDB_DS_SESSION_FAILED) {
802 /* Reset retry relogin timer */
803 atomic_inc(&ddb_entry->relogin_retry_count);
804 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
805 " timed out-retrying"
806 " relogin (%d)\n",
807 ha->host_no,
808 ddb_entry->fw_ddb_index,
809 atomic_read(&ddb_entry->
810 relogin_retry_count))
811 );
812 start_dpc++;
813 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
814 "initate relogin after"
815 " %d seconds\n",
816 ha->host_no, ddb_entry->bus,
817 ddb_entry->target,
818 ddb_entry->fw_ddb_index,
819 ddb_entry->default_time2wait + 4)
820 );
821
822 atomic_set(&ddb_entry->retry_relogin_timer,
823 ddb_entry->default_time2wait + 4);
824 }
825 }
826 }
827
828 if (!is_qla8022(ha)) {
829 /* Check for heartbeat interval. */
830 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
831 ha->heartbeat_interval != 0) {
832 ha->seconds_since_last_heartbeat++;
833 if (ha->seconds_since_last_heartbeat >
834 ha->heartbeat_interval + 2)
835 set_bit(DPC_RESET_HA, &ha->dpc_flags);
836 }
837 }
838
839 /* Wakeup the dpc routine for this adapter, if needed. */
840 if ((start_dpc ||
841 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
842 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
843 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
844 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
845 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
846 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
847 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
848 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
849 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
850 test_bit(DPC_AEN, &ha->dpc_flags)) &&
851 !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
852 ha->dpc_thread) {
853 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
854 " - dpc flags = 0x%lx\n",
855 ha->host_no, __func__, ha->dpc_flags));
856 qla4xxx_wake_dpc(ha);
857 }
858
859 /* Reschedule timer thread to call us back in one second */
860 mod_timer(&ha->timer, jiffies + HZ);
861
862 DEBUG2(ha->seconds_since_last_intr++);
863 }
864
865 /**
866 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
867 * @ha: Pointer to host adapter structure.
868 *
869 * This routine stalls the driver until all outstanding commands are returned.
870 * Caller must release the Hardware Lock prior to calling this routine.
871 **/
872 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
873 {
874 uint32_t index = 0;
875 unsigned long flags;
876 struct scsi_cmnd *cmd;
877
878 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
879
880 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
881 "complete\n", WAIT_CMD_TOV));
882
883 while (!time_after_eq(jiffies, wtime)) {
884 spin_lock_irqsave(&ha->hardware_lock, flags);
885 /* Find a command that hasn't completed. */
886 for (index = 0; index < ha->host->can_queue; index++) {
887 cmd = scsi_host_find_tag(ha->host, index);
888 if (cmd != NULL)
889 break;
890 }
891 spin_unlock_irqrestore(&ha->hardware_lock, flags);
892
893 /* If No Commands are pending, wait is complete */
894 if (index == ha->host->can_queue)
895 return QLA_SUCCESS;
896
897 msleep(1000);
898 }
899 /* If we timed out on waiting for commands to come back
900 * return ERROR. */
901 return QLA_ERROR;
902 }
903
904 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
905 {
906 uint32_t ctrl_status;
907 unsigned long flags = 0;
908
909 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
910
911 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
912 return QLA_ERROR;
913
914 spin_lock_irqsave(&ha->hardware_lock, flags);
915
916 /*
917 * If the SCSI Reset Interrupt bit is set, clear it.
918 * Otherwise, the Soft Reset won't work.
919 */
920 ctrl_status = readw(&ha->reg->ctrl_status);
921 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
922 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
923
924 /* Issue Soft Reset */
925 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
926 readl(&ha->reg->ctrl_status);
927
928 spin_unlock_irqrestore(&ha->hardware_lock, flags);
929 return QLA_SUCCESS;
930 }
931
932 /**
933 * qla4xxx_soft_reset - performs soft reset.
934 * @ha: Pointer to host adapter structure.
935 **/
936 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
937 {
938 uint32_t max_wait_time;
939 unsigned long flags = 0;
940 int status = QLA_ERROR;
941 uint32_t ctrl_status;
942
943 qla4xxx_hw_reset(ha);
944
945 /* Wait until the Network Reset Intr bit is cleared */
946 max_wait_time = RESET_INTR_TOV;
947 do {
948 spin_lock_irqsave(&ha->hardware_lock, flags);
949 ctrl_status = readw(&ha->reg->ctrl_status);
950 spin_unlock_irqrestore(&ha->hardware_lock, flags);
951
952 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
953 break;
954
955 msleep(1000);
956 } while ((--max_wait_time));
957
958 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
959 DEBUG2(printk(KERN_WARNING
960 "scsi%ld: Network Reset Intr not cleared by "
961 "Network function, clearing it now!\n",
962 ha->host_no));
963 spin_lock_irqsave(&ha->hardware_lock, flags);
964 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
965 readl(&ha->reg->ctrl_status);
966 spin_unlock_irqrestore(&ha->hardware_lock, flags);
967 }
968
969 /* Wait until the firmware tells us the Soft Reset is done */
970 max_wait_time = SOFT_RESET_TOV;
971 do {
972 spin_lock_irqsave(&ha->hardware_lock, flags);
973 ctrl_status = readw(&ha->reg->ctrl_status);
974 spin_unlock_irqrestore(&ha->hardware_lock, flags);
975
976 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
977 status = QLA_SUCCESS;
978 break;
979 }
980
981 msleep(1000);
982 } while ((--max_wait_time));
983
984 /*
985 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
986 * after the soft reset has taken place.
987 */
988 spin_lock_irqsave(&ha->hardware_lock, flags);
989 ctrl_status = readw(&ha->reg->ctrl_status);
990 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
991 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
992 readl(&ha->reg->ctrl_status);
993 }
994 spin_unlock_irqrestore(&ha->hardware_lock, flags);
995
996 if (max_wait_time == 0) {
997 /* Issue Force Soft Reset */
998 spin_lock_irqsave(&ha->hardware_lock, flags);
999 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1000 readl(&ha->reg->ctrl_status);
1001 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1002 /* Wait until the firmware tells us the Soft Reset is done */
1003 max_wait_time = SOFT_RESET_TOV;
1004 do {
1005 spin_lock_irqsave(&ha->hardware_lock, flags);
1006 ctrl_status = readw(&ha->reg->ctrl_status);
1007 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1008
1009 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1010 status = QLA_SUCCESS;
1011 break;
1012 }
1013
1014 msleep(1000);
1015 } while ((--max_wait_time));
1016 }
1017
1018 return status;
1019 }
1020
1021 /**
1022 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1023 * @ha: Pointer to host adapter structure.
1024 * @res: returned scsi status
1025 *
1026 * This routine is called just prior to a HARD RESET to return all
1027 * outstanding commands back to the Operating System.
1028 * Caller should make sure that the following locks are released
1029 * before this calling routine: Hardware lock, and io_request_lock.
1030 **/
1031 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1032 {
1033 struct srb *srb;
1034 int i;
1035 unsigned long flags;
1036
1037 spin_lock_irqsave(&ha->hardware_lock, flags);
1038 for (i = 0; i < ha->host->can_queue; i++) {
1039 srb = qla4xxx_del_from_active_array(ha, i);
1040 if (srb != NULL) {
1041 srb->cmd->result = res;
1042 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1043 }
1044 }
1045 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1046 }
1047
1048 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1049 {
1050 clear_bit(AF_ONLINE, &ha->flags);
1051
1052 /* Disable the board */
1053 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1054 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1055
1056 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1057 qla4xxx_mark_all_devices_missing(ha);
1058 clear_bit(AF_INIT_DONE, &ha->flags);
1059 }
1060
1061 /**
1062 * qla4xxx_recover_adapter - recovers adapter after a fatal error
1063 * @ha: Pointer to host adapter structure.
1064 **/
1065 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1066 {
1067 int status = QLA_ERROR;
1068 uint8_t reset_chip = 0;
1069
1070 /* Stall incoming I/O until we are done */
1071 scsi_block_requests(ha->host);
1072 clear_bit(AF_ONLINE, &ha->flags);
1073
1074 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1075
1076 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1077
1078 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1079 reset_chip = 1;
1080
1081 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1082 * do not reset adapter, jump to initialize_adapter */
1083 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1084 status = QLA_SUCCESS;
1085 goto recover_ha_init_adapter;
1086 }
1087
1088 /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1089 * from eh_host_reset or ioctl module */
1090 if (is_qla8022(ha) && !reset_chip &&
1091 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1092
1093 DEBUG2(ql4_printk(KERN_INFO, ha,
1094 "scsi%ld: %s - Performing stop_firmware...\n",
1095 ha->host_no, __func__));
1096 status = ha->isp_ops->reset_firmware(ha);
1097 if (status == QLA_SUCCESS) {
1098 qla4xxx_cmd_wait(ha);
1099 ha->isp_ops->disable_intrs(ha);
1100 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1101 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1102 } else {
1103 /* If the stop_firmware fails then
1104 * reset the entire chip */
1105 reset_chip = 1;
1106 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1107 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1108 }
1109 }
1110
1111 /* Issue full chip reset if recovering from a catastrophic error,
1112 * or if stop_firmware fails for ISP-82xx.
1113 * This is the default case for ISP-4xxx */
1114 if (!is_qla8022(ha) || reset_chip) {
1115 qla4xxx_cmd_wait(ha);
1116 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1117 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1118 DEBUG2(ql4_printk(KERN_INFO, ha,
1119 "scsi%ld: %s - Performing chip reset..\n",
1120 ha->host_no, __func__));
1121 status = ha->isp_ops->reset_chip(ha);
1122 }
1123
1124 /* Flush any pending ddb changed AENs */
1125 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1126
1127 recover_ha_init_adapter:
1128 /* Upon successful firmware/chip reset, re-initialize the adapter */
1129 if (status == QLA_SUCCESS) {
1130 /* For ISP-4xxx, force function 1 to always initialize
1131 * before function 3 to prevent both funcions from
1132 * stepping on top of the other */
1133 if (!is_qla8022(ha) && (ha->mac_index == 3))
1134 ssleep(6);
1135
1136 /* NOTE: AF_ONLINE flag set upon successful completion of
1137 * qla4xxx_initialize_adapter */
1138 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1139 }
1140
1141 /* Retry failed adapter initialization, if necessary
1142 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1143 * case to prevent ping-pong resets between functions */
1144 if (!test_bit(AF_ONLINE, &ha->flags) &&
1145 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1146 /* Adapter initialization failed, see if we can retry
1147 * resetting the ha.
1148 * Since we don't want to block the DPC for too long
1149 * with multiple resets in the same thread,
1150 * utilize DPC to retry */
1151 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1152 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1153 DEBUG2(printk("scsi%ld: recover adapter - retrying "
1154 "(%d) more times\n", ha->host_no,
1155 ha->retry_reset_ha_cnt));
1156 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1157 status = QLA_ERROR;
1158 } else {
1159 if (ha->retry_reset_ha_cnt > 0) {
1160 /* Schedule another Reset HA--DPC will retry */
1161 ha->retry_reset_ha_cnt--;
1162 DEBUG2(printk("scsi%ld: recover adapter - "
1163 "retry remaining %d\n",
1164 ha->host_no,
1165 ha->retry_reset_ha_cnt));
1166 status = QLA_ERROR;
1167 }
1168
1169 if (ha->retry_reset_ha_cnt == 0) {
1170 /* Recover adapter retries have been exhausted.
1171 * Adapter DEAD */
1172 DEBUG2(printk("scsi%ld: recover adapter "
1173 "failed - board disabled\n",
1174 ha->host_no));
1175 qla4xxx_dead_adapter_cleanup(ha);
1176 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1177 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1178 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1179 &ha->dpc_flags);
1180 status = QLA_ERROR;
1181 }
1182 }
1183 } else {
1184 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1185 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1186 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1187 }
1188
1189 ha->adapter_error_count++;
1190
1191 if (test_bit(AF_ONLINE, &ha->flags))
1192 ha->isp_ops->enable_intrs(ha);
1193
1194 scsi_unblock_requests(ha->host);
1195
1196 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1197 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1198 status == QLA_ERROR ? "FAILED" : "SUCCEDED"));
1199
1200 return status;
1201 }
1202
1203 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1204 {
1205 if (ha->dpc_thread &&
1206 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1207 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1208 queue_work(ha->dpc_thread, &ha->dpc_work);
1209 }
1210 }
1211
1212 /**
1213 * qla4xxx_do_dpc - dpc routine
1214 * @data: in our case pointer to adapter structure
1215 *
1216 * This routine is a task that is schedule by the interrupt handler
1217 * to perform the background processing for interrupts. We put it
1218 * on a task queue that is consumed whenever the scheduler runs; that's
1219 * so you can do anything (i.e. put the process to sleep etc). In fact,
1220 * the mid-level tries to sleep when it reaches the driver threshold
1221 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1222 **/
1223 static void qla4xxx_do_dpc(struct work_struct *work)
1224 {
1225 struct scsi_qla_host *ha =
1226 container_of(work, struct scsi_qla_host, dpc_work);
1227 struct ddb_entry *ddb_entry, *dtemp;
1228 int status = QLA_ERROR;
1229
1230 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1231 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1232 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1233
1234 /* Initialization not yet finished. Don't do anything yet. */
1235 if (!test_bit(AF_INIT_DONE, &ha->flags))
1236 goto do_dpc_exit;
1237
1238 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1239 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1240 ha->host_no, __func__, ha->flags));
1241 goto do_dpc_exit;
1242 }
1243
1244 /* HBA is in the process of being permanently disabled.
1245 * Don't process anything */
1246 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1247 return;
1248
1249 if (is_qla8022(ha)) {
1250 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1251 qla4_8xxx_idc_lock(ha);
1252 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1253 QLA82XX_DEV_FAILED);
1254 qla4_8xxx_idc_unlock(ha);
1255 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1256 qla4_8xxx_device_state_handler(ha);
1257 }
1258 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1259 qla4_8xxx_need_qsnt_handler(ha);
1260 }
1261 }
1262
1263 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1264 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1265 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1266 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1267 if (ql4xdontresethba) {
1268 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1269 ha->host_no, __func__));
1270 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1271 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1272 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1273 goto dpc_post_reset_ha;
1274 }
1275 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1276 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1277 qla4xxx_recover_adapter(ha);
1278
1279 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1280 uint8_t wait_time = RESET_INTR_TOV;
1281
1282 while ((readw(&ha->reg->ctrl_status) &
1283 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1284 if (--wait_time == 0)
1285 break;
1286 msleep(1000);
1287 }
1288 if (wait_time == 0)
1289 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1290 "bit not cleared-- resetting\n",
1291 ha->host_no, __func__));
1292 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1293 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1294 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1295 status = qla4xxx_recover_adapter(ha);
1296 }
1297 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1298 if (status == QLA_SUCCESS)
1299 ha->isp_ops->enable_intrs(ha);
1300 }
1301 }
1302
1303 dpc_post_reset_ha:
1304 /* ---- process AEN? --- */
1305 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1306 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1307
1308 /* ---- Get DHCP IP Address? --- */
1309 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1310 qla4xxx_get_dhcp_ip_address(ha);
1311
1312 /* ---- link change? --- */
1313 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1314 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1315 /* ---- link down? --- */
1316 list_for_each_entry_safe(ddb_entry, dtemp,
1317 &ha->ddb_list, list) {
1318 if (atomic_read(&ddb_entry->state) ==
1319 DDB_STATE_ONLINE)
1320 qla4xxx_mark_device_missing(ha,
1321 ddb_entry);
1322 }
1323 } else {
1324 /* ---- link up? --- *
1325 * F/W will auto login to all devices ONLY ONCE after
1326 * link up during driver initialization and runtime
1327 * fatal error recovery. Therefore, the driver must
1328 * manually relogin to devices when recovering from
1329 * connection failures, logouts, expired KATO, etc. */
1330
1331 list_for_each_entry_safe(ddb_entry, dtemp,
1332 &ha->ddb_list, list) {
1333 if ((atomic_read(&ddb_entry->state) ==
1334 DDB_STATE_MISSING) ||
1335 (atomic_read(&ddb_entry->state) ==
1336 DDB_STATE_DEAD)) {
1337 if (ddb_entry->fw_ddb_device_state ==
1338 DDB_DS_SESSION_ACTIVE) {
1339 atomic_set(&ddb_entry->state,
1340 DDB_STATE_ONLINE);
1341 ql4_printk(KERN_INFO, ha,
1342 "scsi%ld: %s: ddb[%d]"
1343 " marked ONLINE\n",
1344 ha->host_no, __func__,
1345 ddb_entry->fw_ddb_index);
1346
1347 iscsi_unblock_session(
1348 ddb_entry->sess);
1349 } else
1350 qla4xxx_relogin_device(
1351 ha, ddb_entry);
1352 }
1353
1354 }
1355 }
1356 }
1357
1358 /* ---- relogin device? --- */
1359 if (adapter_up(ha) &&
1360 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1361 list_for_each_entry_safe(ddb_entry, dtemp,
1362 &ha->ddb_list, list) {
1363 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1364 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1365 qla4xxx_relogin_device(ha, ddb_entry);
1366
1367 /*
1368 * If mbx cmd times out there is no point
1369 * in continuing further.
1370 * With large no of targets this can hang
1371 * the system.
1372 */
1373 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1374 printk(KERN_WARNING "scsi%ld: %s: "
1375 "need to reset hba\n",
1376 ha->host_no, __func__);
1377 break;
1378 }
1379 }
1380 }
1381
1382 do_dpc_exit:
1383 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1384 }
1385
1386 /**
1387 * qla4xxx_free_adapter - release the adapter
1388 * @ha: pointer to adapter structure
1389 **/
1390 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1391 {
1392
1393 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1394 /* Turn-off interrupts on the card. */
1395 ha->isp_ops->disable_intrs(ha);
1396 }
1397
1398 /* Remove timer thread, if present */
1399 if (ha->timer_active)
1400 qla4xxx_stop_timer(ha);
1401
1402 /* Kill the kernel thread for this host */
1403 if (ha->dpc_thread)
1404 destroy_workqueue(ha->dpc_thread);
1405
1406 /* Put firmware in known state */
1407 ha->isp_ops->reset_firmware(ha);
1408
1409 if (is_qla8022(ha)) {
1410 qla4_8xxx_idc_lock(ha);
1411 qla4_8xxx_clear_drv_active(ha);
1412 qla4_8xxx_idc_unlock(ha);
1413 }
1414
1415 /* Detach interrupts */
1416 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1417 qla4xxx_free_irqs(ha);
1418
1419 /* free extra memory */
1420 qla4xxx_mem_free(ha);
1421 }
1422
1423 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1424 {
1425 int status = 0;
1426 uint8_t revision_id;
1427 unsigned long mem_base, mem_len, db_base, db_len;
1428 struct pci_dev *pdev = ha->pdev;
1429
1430 status = pci_request_regions(pdev, DRIVER_NAME);
1431 if (status) {
1432 printk(KERN_WARNING
1433 "scsi(%ld) Failed to reserve PIO regions (%s) "
1434 "status=%d\n", ha->host_no, pci_name(pdev), status);
1435 goto iospace_error_exit;
1436 }
1437
1438 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1439 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1440 __func__, revision_id));
1441 ha->revision_id = revision_id;
1442
1443 /* remap phys address */
1444 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1445 mem_len = pci_resource_len(pdev, 0);
1446 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1447 __func__, mem_base, mem_len));
1448
1449 /* mapping of pcibase pointer */
1450 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1451 if (!ha->nx_pcibase) {
1452 printk(KERN_ERR
1453 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1454 pci_release_regions(ha->pdev);
1455 goto iospace_error_exit;
1456 }
1457
1458 /* Mapping of IO base pointer, door bell read and write pointer */
1459
1460 /* mapping of IO base pointer */
1461 ha->qla4_8xxx_reg =
1462 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1463 0xbc000 + (ha->pdev->devfn << 11));
1464
1465 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1466 db_len = pci_resource_len(pdev, 4);
1467
1468 /* mapping of doorbell write pointer */
1469 ha->nx_db_wr_ptr = (unsigned long)ioremap(db_base +
1470 (ha->pdev->devfn << 12), 4);
1471 if (!ha->nx_db_wr_ptr) {
1472 printk(KERN_ERR
1473 "cannot remap MMIO doorbell-write (%s), aborting\n",
1474 pci_name(pdev));
1475 goto iospace_error_exit;
1476 }
1477 /* mapping of doorbell read pointer */
1478 ha->nx_db_rd_ptr = (uint8_t *) ha->nx_pcibase + (512 * 1024) +
1479 (ha->pdev->devfn * 8);
1480 if (!ha->nx_db_rd_ptr)
1481 printk(KERN_ERR
1482 "cannot remap MMIO doorbell-read (%s), aborting\n",
1483 pci_name(pdev));
1484 return 0;
1485
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 + (30 * HZ);
1958 while (time_before(jiffies, wait_online)) {
1959
1960 if (adapter_up(ha))
1961 return QLA_SUCCESS;
1962 else if (ha->retry_reset_ha_cnt == 0)
1963 return QLA_ERROR;
1964
1965 msleep(2000);
1966 }
1967
1968 return QLA_ERROR;
1969 }
1970
1971 /**
1972 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1973 * @ha: pointer to HBA
1974 * @t: target id
1975 * @l: lun id
1976 *
1977 * This function waits for all outstanding commands to a lun to complete. It
1978 * returns 0 if all pending commands are returned and 1 otherwise.
1979 **/
1980 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1981 struct scsi_target *stgt,
1982 struct scsi_device *sdev)
1983 {
1984 int cnt;
1985 int status = 0;
1986 struct scsi_cmnd *cmd;
1987
1988 /*
1989 * Waiting for all commands for the designated target or dev
1990 * in the active array
1991 */
1992 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1993 cmd = scsi_host_find_tag(ha->host, cnt);
1994 if (cmd && stgt == scsi_target(cmd->device) &&
1995 (!sdev || sdev == cmd->device)) {
1996 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1997 status++;
1998 break;
1999 }
2000 }
2001 }
2002 return status;
2003 }
2004
2005 /**
2006 * qla4xxx_eh_abort - callback for abort task.
2007 * @cmd: Pointer to Linux's SCSI command structure
2008 *
2009 * This routine is called by the Linux OS to abort the specified
2010 * command.
2011 **/
2012 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2013 {
2014 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2015 unsigned int id = cmd->device->id;
2016 unsigned int lun = cmd->device->lun;
2017 unsigned long serial = cmd->serial_number;
2018 struct srb *srb = NULL;
2019 int ret = SUCCESS;
2020 int wait = 0;
2021
2022 ql4_printk(KERN_INFO, ha,
2023 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2024 ha->host_no, id, lun, cmd, serial);
2025
2026 srb = (struct srb *) CMD_SP(cmd);
2027
2028 if (!srb)
2029 return SUCCESS;
2030
2031 kref_get(&srb->srb_ref);
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 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2093 if (stat != QLA_SUCCESS) {
2094 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2095 goto eh_dev_reset_done;
2096 }
2097
2098 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2099 cmd->device)) {
2100 ql4_printk(KERN_INFO, ha,
2101 "DEVICE RESET FAILED - waiting for "
2102 "commands.\n");
2103 goto eh_dev_reset_done;
2104 }
2105
2106 /* Send marker. */
2107 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2108 MM_LUN_RESET) != QLA_SUCCESS)
2109 goto eh_dev_reset_done;
2110
2111 ql4_printk(KERN_INFO, ha,
2112 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2113 ha->host_no, cmd->device->channel, cmd->device->id,
2114 cmd->device->lun);
2115
2116 ret = SUCCESS;
2117
2118 eh_dev_reset_done:
2119
2120 return ret;
2121 }
2122
2123 /**
2124 * qla4xxx_eh_target_reset - callback for target reset.
2125 * @cmd: Pointer to Linux's SCSI command structure
2126 *
2127 * This routine is called by the Linux OS to reset the target.
2128 **/
2129 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2130 {
2131 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2132 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2133 int stat, ret;
2134
2135 if (!ddb_entry)
2136 return FAILED;
2137
2138 ret = iscsi_block_scsi_eh(cmd);
2139 if (ret)
2140 return ret;
2141
2142 starget_printk(KERN_INFO, scsi_target(cmd->device),
2143 "WARM TARGET RESET ISSUED.\n");
2144
2145 DEBUG2(printk(KERN_INFO
2146 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2147 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2148 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2149 ha->dpc_flags, cmd->result, cmd->allowed));
2150
2151 stat = qla4xxx_reset_target(ha, ddb_entry);
2152 if (stat != QLA_SUCCESS) {
2153 starget_printk(KERN_INFO, scsi_target(cmd->device),
2154 "WARM TARGET RESET FAILED.\n");
2155 return FAILED;
2156 }
2157
2158 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2159 NULL)) {
2160 starget_printk(KERN_INFO, scsi_target(cmd->device),
2161 "WARM TARGET DEVICE RESET FAILED - "
2162 "waiting for commands.\n");
2163 return FAILED;
2164 }
2165
2166 /* Send marker. */
2167 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2168 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2169 starget_printk(KERN_INFO, scsi_target(cmd->device),
2170 "WARM TARGET DEVICE RESET FAILED - "
2171 "marker iocb failed.\n");
2172 return FAILED;
2173 }
2174
2175 starget_printk(KERN_INFO, scsi_target(cmd->device),
2176 "WARM TARGET RESET SUCCEEDED.\n");
2177 return SUCCESS;
2178 }
2179
2180 /**
2181 * qla4xxx_eh_host_reset - kernel callback
2182 * @cmd: Pointer to Linux's SCSI command structure
2183 *
2184 * This routine is invoked by the Linux kernel to perform fatal error
2185 * recovery on the specified adapter.
2186 **/
2187 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2188 {
2189 int return_status = FAILED;
2190 struct scsi_qla_host *ha;
2191
2192 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2193
2194 if (ql4xdontresethba) {
2195 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2196 ha->host_no, __func__));
2197 return FAILED;
2198 }
2199
2200 ql4_printk(KERN_INFO, ha,
2201 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2202 cmd->device->channel, cmd->device->id, cmd->device->lun);
2203
2204 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2205 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2206 "DEAD.\n", ha->host_no, cmd->device->channel,
2207 __func__));
2208
2209 return FAILED;
2210 }
2211
2212 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2213 if (is_qla8022(ha))
2214 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2215 else
2216 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2217 }
2218
2219 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2220 return_status = SUCCESS;
2221
2222 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2223 return_status == FAILED ? "FAILED" : "SUCCEDED");
2224
2225 return return_status;
2226 }
2227
2228 /* PCI AER driver recovers from all correctable errors w/o
2229 * driver intervention. For uncorrectable errors PCI AER
2230 * driver calls the following device driver's callbacks
2231 *
2232 * - Fatal Errors - link_reset
2233 * - Non-Fatal Errors - driver's pci_error_detected() which
2234 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2235 *
2236 * PCI AER driver calls
2237 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2238 * returns RECOVERED or NEED_RESET if fw_hung
2239 * NEED_RESET - driver's slot_reset()
2240 * DISCONNECT - device is dead & cannot recover
2241 * RECOVERED - driver's pci_resume()
2242 */
2243 static pci_ers_result_t
2244 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2245 {
2246 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2247
2248 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2249 ha->host_no, __func__, state);
2250
2251 if (!is_aer_supported(ha))
2252 return PCI_ERS_RESULT_NONE;
2253
2254 switch (state) {
2255 case pci_channel_io_normal:
2256 clear_bit(AF_EEH_BUSY, &ha->flags);
2257 return PCI_ERS_RESULT_CAN_RECOVER;
2258 case pci_channel_io_frozen:
2259 set_bit(AF_EEH_BUSY, &ha->flags);
2260 qla4xxx_mailbox_premature_completion(ha);
2261 qla4xxx_free_irqs(ha);
2262 pci_disable_device(pdev);
2263 return PCI_ERS_RESULT_NEED_RESET;
2264 case pci_channel_io_perm_failure:
2265 set_bit(AF_EEH_BUSY, &ha->flags);
2266 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2267 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2268 return PCI_ERS_RESULT_DISCONNECT;
2269 }
2270 return PCI_ERS_RESULT_NEED_RESET;
2271 }
2272
2273 /**
2274 * qla4xxx_pci_mmio_enabled() gets called if
2275 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2276 * and read/write to the device still works.
2277 **/
2278 static pci_ers_result_t
2279 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2280 {
2281 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2282
2283 if (!is_aer_supported(ha))
2284 return PCI_ERS_RESULT_NONE;
2285
2286 if (test_bit(AF_FW_RECOVERY, &ha->flags)) {
2287 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: firmware hang -- "
2288 "mmio_enabled\n", ha->host_no, __func__);
2289 return PCI_ERS_RESULT_NEED_RESET;
2290 } else
2291 return PCI_ERS_RESULT_RECOVERED;
2292 }
2293
2294 uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2295 {
2296 uint32_t rval = QLA_ERROR;
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 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2309 }
2310
2311 fn = PCI_FUNC(ha->pdev->devfn);
2312 while (fn > 0) {
2313 fn--;
2314 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2315 "func %x\n", ha->host_no, __func__, fn);
2316 /* Get the pci device given the domain, bus,
2317 * slot/function number */
2318 other_pdev =
2319 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2320 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2321 fn));
2322
2323 if (!other_pdev)
2324 continue;
2325
2326 if (atomic_read(&other_pdev->enable_cnt)) {
2327 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2328 "func in enabled state%x\n", ha->host_no,
2329 __func__, fn);
2330 pci_dev_put(other_pdev);
2331 break;
2332 }
2333 pci_dev_put(other_pdev);
2334 }
2335
2336 /* The first function on the card, the reset owner will
2337 * start & initialize the firmware. The other functions
2338 * on the card will reset the firmware context
2339 */
2340 if (!fn) {
2341 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2342 "0x%x is the owner\n", ha->host_no, __func__,
2343 ha->pdev->devfn);
2344
2345 qla4_8xxx_idc_lock(ha);
2346 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2347 QLA82XX_DEV_COLD);
2348
2349 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2350 QLA82XX_IDC_VERSION);
2351
2352 qla4_8xxx_idc_unlock(ha);
2353 clear_bit(AF_FW_RECOVERY, &ha->flags);
2354 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2355 qla4_8xxx_idc_lock(ha);
2356
2357 if (rval != QLA_SUCCESS) {
2358 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2359 "FAILED\n", ha->host_no, __func__);
2360 qla4_8xxx_clear_drv_active(ha);
2361 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2362 QLA82XX_DEV_FAILED);
2363 } else {
2364 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2365 "READY\n", ha->host_no, __func__);
2366 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2367 QLA82XX_DEV_READY);
2368 /* Clear driver state register */
2369 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2370 qla4_8xxx_set_drv_active(ha);
2371 ha->isp_ops->enable_intrs(ha);
2372 }
2373 qla4_8xxx_idc_unlock(ha);
2374 } else {
2375 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2376 "the reset owner\n", ha->host_no, __func__,
2377 ha->pdev->devfn);
2378 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2379 QLA82XX_DEV_READY)) {
2380 clear_bit(AF_FW_RECOVERY, &ha->flags);
2381 rval = qla4xxx_initialize_adapter(ha,
2382 PRESERVE_DDB_LIST);
2383 if (rval == QLA_SUCCESS)
2384 ha->isp_ops->enable_intrs(ha);
2385 qla4_8xxx_idc_lock(ha);
2386 qla4_8xxx_set_drv_active(ha);
2387 qla4_8xxx_idc_unlock(ha);
2388 }
2389 }
2390 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2391 return rval;
2392 }
2393
2394 static pci_ers_result_t
2395 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2396 {
2397 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2398 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2399 int rc;
2400
2401 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2402 ha->host_no, __func__);
2403
2404 if (!is_aer_supported(ha))
2405 return PCI_ERS_RESULT_NONE;
2406
2407 /* Restore the saved state of PCIe device -
2408 * BAR registers, PCI Config space, PCIX, MSI,
2409 * IOV states
2410 */
2411 pci_restore_state(pdev);
2412
2413 /* pci_restore_state() clears the saved_state flag of the device
2414 * save restored state which resets saved_state flag
2415 */
2416 pci_save_state(pdev);
2417
2418 /* Initialize device or resume if in suspended state */
2419 rc = pci_enable_device(pdev);
2420 if (rc) {
2421 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2422 "device after reset\n", ha->host_no, __func__);
2423 goto exit_slot_reset;
2424 }
2425
2426 ret = qla4xxx_request_irqs(ha);
2427 if (ret) {
2428 ql4_printk(KERN_WARNING, ha, "Failed to reserve interrupt %d"
2429 " already in use.\n", pdev->irq);
2430 goto exit_slot_reset;
2431 }
2432
2433 if (is_qla8022(ha)) {
2434 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2435 ret = PCI_ERS_RESULT_RECOVERED;
2436 goto exit_slot_reset;
2437 } else
2438 goto exit_slot_reset;
2439 }
2440
2441 exit_slot_reset:
2442 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2443 "device after reset\n", ha->host_no, __func__, ret);
2444 return ret;
2445 }
2446
2447 static void
2448 qla4xxx_pci_resume(struct pci_dev *pdev)
2449 {
2450 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2451 int ret;
2452
2453 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2454 ha->host_no, __func__);
2455
2456 ret = qla4xxx_wait_for_hba_online(ha);
2457 if (ret != QLA_SUCCESS) {
2458 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2459 "resume I/O from slot/link_reset\n", ha->host_no,
2460 __func__);
2461 }
2462
2463 pci_cleanup_aer_uncorrect_error_status(pdev);
2464 clear_bit(AF_EEH_BUSY, &ha->flags);
2465 }
2466
2467 static struct pci_error_handlers qla4xxx_err_handler = {
2468 .error_detected = qla4xxx_pci_error_detected,
2469 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2470 .slot_reset = qla4xxx_pci_slot_reset,
2471 .resume = qla4xxx_pci_resume,
2472 };
2473
2474 static struct pci_device_id qla4xxx_pci_tbl[] = {
2475 {
2476 .vendor = PCI_VENDOR_ID_QLOGIC,
2477 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2478 .subvendor = PCI_ANY_ID,
2479 .subdevice = PCI_ANY_ID,
2480 },
2481 {
2482 .vendor = PCI_VENDOR_ID_QLOGIC,
2483 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2484 .subvendor = PCI_ANY_ID,
2485 .subdevice = PCI_ANY_ID,
2486 },
2487 {
2488 .vendor = PCI_VENDOR_ID_QLOGIC,
2489 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2490 .subvendor = PCI_ANY_ID,
2491 .subdevice = PCI_ANY_ID,
2492 },
2493 {
2494 .vendor = PCI_VENDOR_ID_QLOGIC,
2495 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2496 .subvendor = PCI_ANY_ID,
2497 .subdevice = PCI_ANY_ID,
2498 },
2499 {0, 0},
2500 };
2501 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2502
2503 static struct pci_driver qla4xxx_pci_driver = {
2504 .name = DRIVER_NAME,
2505 .id_table = qla4xxx_pci_tbl,
2506 .probe = qla4xxx_probe_adapter,
2507 .remove = qla4xxx_remove_adapter,
2508 .err_handler = &qla4xxx_err_handler,
2509 };
2510
2511 static int __init qla4xxx_module_init(void)
2512 {
2513 int ret;
2514
2515 /* Allocate cache for SRBs. */
2516 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2517 SLAB_HWCACHE_ALIGN, NULL);
2518 if (srb_cachep == NULL) {
2519 printk(KERN_ERR
2520 "%s: Unable to allocate SRB cache..."
2521 "Failing load!\n", DRIVER_NAME);
2522 ret = -ENOMEM;
2523 goto no_srp_cache;
2524 }
2525
2526 /* Derive version string. */
2527 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2528 if (ql4xextended_error_logging)
2529 strcat(qla4xxx_version_str, "-debug");
2530
2531 qla4xxx_scsi_transport =
2532 iscsi_register_transport(&qla4xxx_iscsi_transport);
2533 if (!qla4xxx_scsi_transport){
2534 ret = -ENODEV;
2535 goto release_srb_cache;
2536 }
2537
2538 ret = pci_register_driver(&qla4xxx_pci_driver);
2539 if (ret)
2540 goto unregister_transport;
2541
2542 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2543 return 0;
2544
2545 unregister_transport:
2546 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2547 release_srb_cache:
2548 kmem_cache_destroy(srb_cachep);
2549 no_srp_cache:
2550 return ret;
2551 }
2552
2553 static void __exit qla4xxx_module_exit(void)
2554 {
2555 pci_unregister_driver(&qla4xxx_pci_driver);
2556 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2557 kmem_cache_destroy(srb_cachep);
2558 }
2559
2560 module_init(qla4xxx_module_init);
2561 module_exit(qla4xxx_module_exit);
2562
2563 MODULE_AUTHOR("QLogic Corporation");
2564 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2565 MODULE_LICENSE("GPL");
2566 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
Tomato firmware and modifications.