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IPVS: fix netns if reading ip_vs_* procfs entries
[linux-2.6/linux-mips.git] / drivers / scsi / qla4xxx / ql4_os.c
blob230ba097d28ca0d8e50d2dd05af3f24c8b6520c8
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2010 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 ql4xdontresethba = 0;
33 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ql4xdontresethba,
35 "Don't reset the HBA for driver recovery \n"
36 " 0 - It will reset HBA (Default)\n"
37 " 1 - It will NOT reset HBA");
38
39 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
40 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);
41 MODULE_PARM_DESC(ql4xextended_error_logging,
42 "Option to enable extended error logging, "
43 "Default is 0 - no logging, 1 - debug logging");
44
45 int ql4xenablemsix = 1;
46 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
47 MODULE_PARM_DESC(ql4xenablemsix,
48 "Set to enable MSI or MSI-X interrupt mechanism.\n"
49 " 0 = enable INTx interrupt mechanism.\n"
50 " 1 = enable MSI-X interrupt mechanism (Default).\n"
51 " 2 = enable MSI interrupt mechanism.");
52
53 #define QL4_DEF_QDEPTH 32
54 static int ql4xmaxqdepth = QL4_DEF_QDEPTH;
55 module_param(ql4xmaxqdepth, int, S_IRUGO | S_IWUSR);
56 MODULE_PARM_DESC(ql4xmaxqdepth,
57 "Maximum queue depth to report for target devices.\n"
58 " Default: 32.");
59
60 static int ql4xsess_recovery_tmo = QL4_SESS_RECOVERY_TMO;
61 module_param(ql4xsess_recovery_tmo, int, S_IRUGO);
62 MODULE_PARM_DESC(ql4xsess_recovery_tmo,
63 "Target Session Recovery Timeout.\n"
64 " Default: 30 sec.");
65
66 /*
67 * SCSI host template entry points
68 */
69 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
70
71 /*
72 * iSCSI template entry points
73 */
74 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
75 enum iscsi_tgt_dscvr type, uint32_t enable,
76 struct sockaddr *dst_addr);
77 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
78 enum iscsi_param param, char *buf);
79 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
80 enum iscsi_param param, char *buf);
81 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
82 enum iscsi_host_param param, char *buf);
83 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
84 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
85
86 /*
87 * SCSI host template entry points
88 */
89 static int qla4xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);
90 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
91 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
92 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
93 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
94 static int qla4xxx_slave_alloc(struct scsi_device *device);
95 static int qla4xxx_slave_configure(struct scsi_device *device);
96 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
97 static void qla4xxx_scan_start(struct Scsi_Host *shost);
98
99 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
100 QLA82XX_LEGACY_INTR_CONFIG;
101
102 static struct scsi_host_template qla4xxx_driver_template = {
103 .module = THIS_MODULE,
104 .name = DRIVER_NAME,
105 .proc_name = DRIVER_NAME,
106 .queuecommand = qla4xxx_queuecommand,
107
108 .eh_abort_handler = qla4xxx_eh_abort,
109 .eh_device_reset_handler = qla4xxx_eh_device_reset,
110 .eh_target_reset_handler = qla4xxx_eh_target_reset,
111 .eh_host_reset_handler = qla4xxx_eh_host_reset,
112 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
113
114 .slave_configure = qla4xxx_slave_configure,
115 .slave_alloc = qla4xxx_slave_alloc,
116 .slave_destroy = qla4xxx_slave_destroy,
117
118 .scan_finished = iscsi_scan_finished,
119 .scan_start = qla4xxx_scan_start,
120
121 .this_id = -1,
122 .cmd_per_lun = 3,
123 .use_clustering = ENABLE_CLUSTERING,
124 .sg_tablesize = SG_ALL,
125
126 .max_sectors = 0xFFFF,
127 };
128
129 static struct iscsi_transport qla4xxx_iscsi_transport = {
130 .owner = THIS_MODULE,
131 .name = DRIVER_NAME,
132 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
133 CAP_DATA_PATH_OFFLOAD,
134 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
135 ISCSI_TARGET_NAME | ISCSI_TPGT |
136 ISCSI_TARGET_ALIAS,
137 .host_param_mask = ISCSI_HOST_HWADDRESS |
138 ISCSI_HOST_IPADDRESS |
139 ISCSI_HOST_INITIATOR_NAME,
140 .tgt_dscvr = qla4xxx_tgt_dscvr,
141 .get_conn_param = qla4xxx_conn_get_param,
142 .get_session_param = qla4xxx_sess_get_param,
143 .get_host_param = qla4xxx_host_get_param,
144 .session_recovery_timedout = qla4xxx_recovery_timedout,
145 };
146
147 static struct scsi_transport_template *qla4xxx_scsi_transport;
148
149 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
150 {
151 struct iscsi_cls_session *session;
152 struct ddb_entry *ddb_entry;
153
154 session = starget_to_session(scsi_target(sc->device));
155 ddb_entry = session->dd_data;
156
157 /* if we are not logged in then the LLD is going to clean up the cmd */
158 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
159 return BLK_EH_RESET_TIMER;
160 else
161 return BLK_EH_NOT_HANDLED;
162 }
163
164 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
165 {
166 struct ddb_entry *ddb_entry = session->dd_data;
167 struct scsi_qla_host *ha = ddb_entry->ha;
168
169 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
170 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
171
172 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout "
173 "of (%d) secs exhausted, marking device DEAD.\n",
174 ha->host_no, __func__, ddb_entry->fw_ddb_index,
175 ddb_entry->sess->recovery_tmo));
176 }
177 }
178
179 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
180 enum iscsi_host_param param, char *buf)
181 {
182 struct scsi_qla_host *ha = to_qla_host(shost);
183 int len;
184
185 switch (param) {
186 case ISCSI_HOST_PARAM_HWADDRESS:
187 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
188 break;
189 case ISCSI_HOST_PARAM_IPADDRESS:
190 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
191 ha->ip_address[1], ha->ip_address[2],
192 ha->ip_address[3]);
193 break;
194 case ISCSI_HOST_PARAM_INITIATOR_NAME:
195 len = sprintf(buf, "%s\n", ha->name_string);
196 break;
197 default:
198 return -ENOSYS;
199 }
200
201 return len;
202 }
203
204 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
205 enum iscsi_param param, char *buf)
206 {
207 struct ddb_entry *ddb_entry = sess->dd_data;
208 int len;
209
210 switch (param) {
211 case ISCSI_PARAM_TARGET_NAME:
212 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
213 ddb_entry->iscsi_name);
214 break;
215 case ISCSI_PARAM_TPGT:
216 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
217 break;
218 case ISCSI_PARAM_TARGET_ALIAS:
219 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
220 ddb_entry->iscsi_alias);
221 break;
222 default:
223 return -ENOSYS;
224 }
225
226 return len;
227 }
228
229 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
230 enum iscsi_param param, char *buf)
231 {
232 struct iscsi_cls_session *session;
233 struct ddb_entry *ddb_entry;
234 int len;
235
236 session = iscsi_dev_to_session(conn->dev.parent);
237 ddb_entry = session->dd_data;
238
239 switch (param) {
240 case ISCSI_PARAM_CONN_PORT:
241 len = sprintf(buf, "%hu\n", ddb_entry->port);
242 break;
243 case ISCSI_PARAM_CONN_ADDRESS:
244 /* TODO: what are the ipv6 bits */
245 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
246 break;
247 default:
248 return -ENOSYS;
249 }
250
251 return len;
252 }
253
254 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
255 enum iscsi_tgt_dscvr type, uint32_t enable,
256 struct sockaddr *dst_addr)
257 {
258 struct scsi_qla_host *ha;
259 struct sockaddr_in *addr;
260 struct sockaddr_in6 *addr6;
261 int ret = 0;
262
263 ha = (struct scsi_qla_host *) shost->hostdata;
264
265 switch (type) {
266 case ISCSI_TGT_DSCVR_SEND_TARGETS:
267 if (dst_addr->sa_family == AF_INET) {
268 addr = (struct sockaddr_in *)dst_addr;
269 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
270 addr->sin_port) != QLA_SUCCESS)
271 ret = -EIO;
272 } else if (dst_addr->sa_family == AF_INET6) {
273 /*
274 * TODO: fix qla4xxx_send_tgts
275 */
276 addr6 = (struct sockaddr_in6 *)dst_addr;
277 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
278 addr6->sin6_port) != QLA_SUCCESS)
279 ret = -EIO;
280 } else
281 ret = -ENOSYS;
282 break;
283 default:
284 ret = -ENOSYS;
285 }
286 return ret;
287 }
288
289 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
290 {
291 if (!ddb_entry->sess)
292 return;
293
294 if (ddb_entry->conn) {
295 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
296 iscsi_remove_session(ddb_entry->sess);
297 }
298 iscsi_free_session(ddb_entry->sess);
299 }
300
301 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
302 {
303 int err;
304
305 ddb_entry->sess->recovery_tmo = ql4xsess_recovery_tmo;
306
307 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
308 if (err) {
309 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
310 return err;
311 }
312
313 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
314 if (!ddb_entry->conn) {
315 iscsi_remove_session(ddb_entry->sess);
316 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
317 return -ENOMEM;
318 }
319
320 /* finally ready to go */
321 iscsi_unblock_session(ddb_entry->sess);
322 return 0;
323 }
324
325 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
326 {
327 struct ddb_entry *ddb_entry;
328 struct iscsi_cls_session *sess;
329
330 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
331 sizeof(struct ddb_entry));
332 if (!sess)
333 return NULL;
334
335 ddb_entry = sess->dd_data;
336 memset(ddb_entry, 0, sizeof(*ddb_entry));
337 ddb_entry->ha = ha;
338 ddb_entry->sess = sess;
339 return ddb_entry;
340 }
341
342 static void qla4xxx_scan_start(struct Scsi_Host *shost)
343 {
344 struct scsi_qla_host *ha = shost_priv(shost);
345 struct ddb_entry *ddb_entry, *ddbtemp;
346
347 /* finish setup of sessions that were already setup in firmware */
348 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
349 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
350 qla4xxx_add_sess(ddb_entry);
351 }
352 }
353
354 /*
355 * Timer routines
356 */
357
358 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
359 unsigned long interval)
360 {
361 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
362 __func__, ha->host->host_no));
363 init_timer(&ha->timer);
364 ha->timer.expires = jiffies + interval * HZ;
365 ha->timer.data = (unsigned long)ha;
366 ha->timer.function = (void (*)(unsigned long))func;
367 add_timer(&ha->timer);
368 ha->timer_active = 1;
369 }
370
371 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
372 {
373 del_timer_sync(&ha->timer);
374 ha->timer_active = 0;
375 }
376
377 /***
378 * qla4xxx_mark_device_missing - mark a device as missing.
379 * @ha: Pointer to host adapter structure.
380 * @ddb_entry: Pointer to device database entry
381 *
382 * This routine marks a device missing and close connection.
383 **/
384 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
385 struct ddb_entry *ddb_entry)
386 {
387 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
388 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
389 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
390 ha->host_no, ddb_entry->fw_ddb_index));
391 } else
392 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
393 ddb_entry->fw_ddb_index))
394
395 iscsi_block_session(ddb_entry->sess);
396 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
397 }
398
399 /**
400 * qla4xxx_mark_all_devices_missing - mark all devices as missing.
401 * @ha: Pointer to host adapter structure.
402 *
403 * This routine marks a device missing and resets the relogin retry count.
404 **/
405 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
406 {
407 struct ddb_entry *ddb_entry, *ddbtemp;
408 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
409 qla4xxx_mark_device_missing(ha, ddb_entry);
410 }
411 }
412
413 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
414 struct ddb_entry *ddb_entry,
415 struct scsi_cmnd *cmd,
416 void (*done)(struct scsi_cmnd *))
417 {
418 struct srb *srb;
419
420 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
421 if (!srb)
422 return srb;
423
424 kref_init(&srb->srb_ref);
425 srb->ha = ha;
426 srb->ddb = ddb_entry;
427 srb->cmd = cmd;
428 srb->flags = 0;
429 CMD_SP(cmd) = (void *)srb;
430 cmd->scsi_done = done;
431
432 return srb;
433 }
434
435 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
436 {
437 struct scsi_cmnd *cmd = srb->cmd;
438
439 if (srb->flags & SRB_DMA_VALID) {
440 scsi_dma_unmap(cmd);
441 srb->flags &= ~SRB_DMA_VALID;
442 }
443 CMD_SP(cmd) = NULL;
444 }
445
446 void qla4xxx_srb_compl(struct kref *ref)
447 {
448 struct srb *srb = container_of(ref, struct srb, srb_ref);
449 struct scsi_cmnd *cmd = srb->cmd;
450 struct scsi_qla_host *ha = srb->ha;
451
452 qla4xxx_srb_free_dma(ha, srb);
453
454 mempool_free(srb, ha->srb_mempool);
455
456 cmd->scsi_done(cmd);
457 }
458
459 /**
460 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
461 * @cmd: Pointer to Linux's SCSI command structure
462 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
463 * that the command has been processed.
464 *
465 * Remarks:
466 * This routine is invoked by Linux to send a SCSI command to the driver.
467 * The mid-level driver tries to ensure that queuecommand never gets
468 * invoked concurrently with itself or the interrupt handler (although
469 * the interrupt handler may call this routine as part of request-
470 * completion handling). Unfortunely, it sometimes calls the scheduler
471 * in interrupt context which is a big NO! NO!.
472 **/
473 static int qla4xxx_queuecommand_lck(struct scsi_cmnd *cmd,
474 void (*done)(struct scsi_cmnd *))
475 {
476 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
477 struct ddb_entry *ddb_entry = cmd->device->hostdata;
478 struct iscsi_cls_session *sess = ddb_entry->sess;
479 struct srb *srb;
480 int rval;
481
482 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
483 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
484 cmd->result = DID_NO_CONNECT << 16;
485 else
486 cmd->result = DID_REQUEUE << 16;
487 goto qc_fail_command;
488 }
489
490 if (!sess) {
491 cmd->result = DID_IMM_RETRY << 16;
492 goto qc_fail_command;
493 }
494
495 rval = iscsi_session_chkready(sess);
496 if (rval) {
497 cmd->result = rval;
498 goto qc_fail_command;
499 }
500
501 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
502 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
503 cmd->result = DID_NO_CONNECT << 16;
504 goto qc_fail_command;
505 }
506 return SCSI_MLQUEUE_TARGET_BUSY;
507 }
508
509 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
510 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
511 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
512 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
513 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
514 !test_bit(AF_ONLINE, &ha->flags) ||
515 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
516 goto qc_host_busy;
517
518 spin_unlock_irq(ha->host->host_lock);
519
520 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
521 if (!srb)
522 goto qc_host_busy_lock;
523
524 rval = qla4xxx_send_command_to_isp(ha, srb);
525 if (rval != QLA_SUCCESS)
526 goto qc_host_busy_free_sp;
527
528 spin_lock_irq(ha->host->host_lock);
529 return 0;
530
531 qc_host_busy_free_sp:
532 qla4xxx_srb_free_dma(ha, srb);
533 mempool_free(srb, ha->srb_mempool);
534
535 qc_host_busy_lock:
536 spin_lock_irq(ha->host->host_lock);
537
538 qc_host_busy:
539 return SCSI_MLQUEUE_HOST_BUSY;
540
541 qc_fail_command:
542 done(cmd);
543
544 return 0;
545 }
546
547 static DEF_SCSI_QCMD(qla4xxx_queuecommand)
548
549 /**
550 * qla4xxx_mem_free - frees memory allocated to adapter
551 * @ha: Pointer to host adapter structure.
552 *
553 * Frees memory previously allocated by qla4xxx_mem_alloc
554 **/
555 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
556 {
557 if (ha->queues)
558 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
559 ha->queues_dma);
560
561 ha->queues_len = 0;
562 ha->queues = NULL;
563 ha->queues_dma = 0;
564 ha->request_ring = NULL;
565 ha->request_dma = 0;
566 ha->response_ring = NULL;
567 ha->response_dma = 0;
568 ha->shadow_regs = NULL;
569 ha->shadow_regs_dma = 0;
570
571 /* Free srb pool. */
572 if (ha->srb_mempool)
573 mempool_destroy(ha->srb_mempool);
574
575 ha->srb_mempool = NULL;
576
577 /* release io space registers */
578 if (is_qla8022(ha)) {
579 if (ha->nx_pcibase)
580 iounmap(
581 (struct device_reg_82xx __iomem *)ha->nx_pcibase);
582 } else if (ha->reg)
583 iounmap(ha->reg);
584 pci_release_regions(ha->pdev);
585 }
586
587 /**
588 * qla4xxx_mem_alloc - allocates memory for use by adapter.
589 * @ha: Pointer to host adapter structure
590 *
591 * Allocates DMA memory for request and response queues. Also allocates memory
592 * for srbs.
593 **/
594 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
595 {
596 unsigned long align;
597
598 /* Allocate contiguous block of DMA memory for queues. */
599 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
600 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
601 sizeof(struct shadow_regs) +
602 MEM_ALIGN_VALUE +
603 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
604 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
605 &ha->queues_dma, GFP_KERNEL);
606 if (ha->queues == NULL) {
607 ql4_printk(KERN_WARNING, ha,
608 "Memory Allocation failed - queues.\n");
609
610 goto mem_alloc_error_exit;
611 }
612 memset(ha->queues, 0, ha->queues_len);
613
614 /*
615 * As per RISC alignment requirements -- the bus-address must be a
616 * multiple of the request-ring size (in bytes).
617 */
618 align = 0;
619 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
620 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
621 (MEM_ALIGN_VALUE - 1));
622
623 /* Update request and response queue pointers. */
624 ha->request_dma = ha->queues_dma + align;
625 ha->request_ring = (struct queue_entry *) (ha->queues + align);
626 ha->response_dma = ha->queues_dma + align +
627 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
628 ha->response_ring = (struct queue_entry *) (ha->queues + align +
629 (REQUEST_QUEUE_DEPTH *
630 QUEUE_SIZE));
631 ha->shadow_regs_dma = ha->queues_dma + align +
632 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
633 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
634 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
635 (REQUEST_QUEUE_DEPTH *
636 QUEUE_SIZE) +
637 (RESPONSE_QUEUE_DEPTH *
638 QUEUE_SIZE));
639
640 /* Allocate memory for srb pool. */
641 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
642 mempool_free_slab, srb_cachep);
643 if (ha->srb_mempool == NULL) {
644 ql4_printk(KERN_WARNING, ha,
645 "Memory Allocation failed - SRB Pool.\n");
646
647 goto mem_alloc_error_exit;
648 }
649
650 return QLA_SUCCESS;
651
652 mem_alloc_error_exit:
653 qla4xxx_mem_free(ha);
654 return QLA_ERROR;
655 }
656
657 /**
658 * qla4_8xxx_check_fw_alive - Check firmware health
659 * @ha: Pointer to host adapter structure.
660 *
661 * Context: Interrupt
662 **/
663 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
664 {
665 uint32_t fw_heartbeat_counter, halt_status;
666
667 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
668 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
669 if (fw_heartbeat_counter == 0xffffffff) {
670 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
671 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
672 ha->host_no, __func__));
673 return;
674 }
675
676 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
677 ha->seconds_since_last_heartbeat++;
678 /* FW not alive after 2 seconds */
679 if (ha->seconds_since_last_heartbeat == 2) {
680 ha->seconds_since_last_heartbeat = 0;
681 halt_status = qla4_8xxx_rd_32(ha,
682 QLA82XX_PEG_HALT_STATUS1);
683
684 /* Since we cannot change dev_state in interrupt
685 * context, set appropriate DPC flag then wakeup
686 * DPC */
687 if (halt_status & HALT_STATUS_UNRECOVERABLE)
688 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
689 else {
690 printk("scsi%ld: %s: detect abort needed!\n",
691 ha->host_no, __func__);
692 set_bit(DPC_RESET_HA, &ha->dpc_flags);
693 }
694 qla4xxx_wake_dpc(ha);
695 qla4xxx_mailbox_premature_completion(ha);
696 }
697 } else
698 ha->seconds_since_last_heartbeat = 0;
699
700 ha->fw_heartbeat_counter = fw_heartbeat_counter;
701 }
702
703 /**
704 * qla4_8xxx_watchdog - Poll dev state
705 * @ha: Pointer to host adapter structure.
706 *
707 * Context: Interrupt
708 **/
709 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
710 {
711 uint32_t dev_state;
712
713 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
714
715 /* don't poll if reset is going on */
716 if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
717 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
718 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags))) {
719 if (dev_state == QLA82XX_DEV_NEED_RESET &&
720 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
721 if (!ql4xdontresethba) {
722 ql4_printk(KERN_INFO, ha, "%s: HW State: "
723 "NEED RESET!\n", __func__);
724 set_bit(DPC_RESET_HA, &ha->dpc_flags);
725 qla4xxx_wake_dpc(ha);
726 qla4xxx_mailbox_premature_completion(ha);
727 }
728 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
729 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
730 ql4_printk(KERN_INFO, ha, "%s: HW State: NEED QUIES!\n",
731 __func__);
732 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
733 qla4xxx_wake_dpc(ha);
734 } else {
735 /* Check firmware health */
736 qla4_8xxx_check_fw_alive(ha);
737 }
738 }
739 }
740
741 /**
742 * qla4xxx_timer - checks every second for work to do.
743 * @ha: Pointer to host adapter structure.
744 **/
745 static void qla4xxx_timer(struct scsi_qla_host *ha)
746 {
747 struct ddb_entry *ddb_entry, *dtemp;
748 int start_dpc = 0;
749 uint16_t w;
750
751 /* If we are in the middle of AER/EEH processing
752 * skip any processing and reschedule the timer
753 */
754 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
755 mod_timer(&ha->timer, jiffies + HZ);
756 return;
757 }
758
759 /* Hardware read to trigger an EEH error during mailbox waits. */
760 if (!pci_channel_offline(ha->pdev))
761 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
762
763 if (is_qla8022(ha)) {
764 qla4_8xxx_watchdog(ha);
765 }
766
767 /* Search for relogin's to time-out and port down retry. */
768 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
769 /* Count down time between sending relogins */
770 if (adapter_up(ha) &&
771 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
772 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
773 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
774 INVALID_ENTRY) {
775 if (atomic_read(&ddb_entry->retry_relogin_timer)
776 == 0) {
777 atomic_set(&ddb_entry->
778 retry_relogin_timer,
779 INVALID_ENTRY);
780 set_bit(DPC_RELOGIN_DEVICE,
781 &ha->dpc_flags);
782 set_bit(DF_RELOGIN, &ddb_entry->flags);
783 DEBUG2(printk("scsi%ld: %s: ddb [%d]"
784 " login device\n",
785 ha->host_no, __func__,
786 ddb_entry->fw_ddb_index));
787 } else
788 atomic_dec(&ddb_entry->
789 retry_relogin_timer);
790 }
791 }
792
793 /* Wait for relogin to timeout */
794 if (atomic_read(&ddb_entry->relogin_timer) &&
795 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
796 /*
797 * If the relogin times out and the device is
798 * still NOT ONLINE then try and relogin again.
799 */
800 if (atomic_read(&ddb_entry->state) !=
801 DDB_STATE_ONLINE &&
802 ddb_entry->fw_ddb_device_state ==
803 DDB_DS_SESSION_FAILED) {
804 /* Reset retry relogin timer */
805 atomic_inc(&ddb_entry->relogin_retry_count);
806 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
807 " timed out-retrying"
808 " relogin (%d)\n",
809 ha->host_no,
810 ddb_entry->fw_ddb_index,
811 atomic_read(&ddb_entry->
812 relogin_retry_count))
813 );
814 start_dpc++;
815 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
816 "initiate relogin after"
817 " %d seconds\n",
818 ha->host_no, ddb_entry->bus,
819 ddb_entry->target,
820 ddb_entry->fw_ddb_index,
821 ddb_entry->default_time2wait + 4)
822 );
823
824 atomic_set(&ddb_entry->retry_relogin_timer,
825 ddb_entry->default_time2wait + 4);
826 }
827 }
828 }
829
830 if (!is_qla8022(ha)) {
831 /* Check for heartbeat interval. */
832 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
833 ha->heartbeat_interval != 0) {
834 ha->seconds_since_last_heartbeat++;
835 if (ha->seconds_since_last_heartbeat >
836 ha->heartbeat_interval + 2)
837 set_bit(DPC_RESET_HA, &ha->dpc_flags);
838 }
839 }
840
841 /* Wakeup the dpc routine for this adapter, if needed. */
842 if ((start_dpc ||
843 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
844 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
845 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
846 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
847 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
848 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
849 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
850 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
851 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
852 test_bit(DPC_AEN, &ha->dpc_flags)) &&
853 !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
854 ha->dpc_thread) {
855 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
856 " - dpc flags = 0x%lx\n",
857 ha->host_no, __func__, ha->dpc_flags));
858 qla4xxx_wake_dpc(ha);
859 }
860
861 /* Reschedule timer thread to call us back in one second */
862 mod_timer(&ha->timer, jiffies + HZ);
863
864 DEBUG2(ha->seconds_since_last_intr++);
865 }
866
867 /**
868 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
869 * @ha: Pointer to host adapter structure.
870 *
871 * This routine stalls the driver until all outstanding commands are returned.
872 * Caller must release the Hardware Lock prior to calling this routine.
873 **/
874 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
875 {
876 uint32_t index = 0;
877 unsigned long flags;
878 struct scsi_cmnd *cmd;
879
880 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
881
882 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
883 "complete\n", WAIT_CMD_TOV));
884
885 while (!time_after_eq(jiffies, wtime)) {
886 spin_lock_irqsave(&ha->hardware_lock, flags);
887 /* Find a command that hasn't completed. */
888 for (index = 0; index < ha->host->can_queue; index++) {
889 cmd = scsi_host_find_tag(ha->host, index);
890 /*
891 * We cannot just check if the index is valid,
892 * becase if we are run from the scsi eh, then
893 * the scsi/block layer is going to prevent
894 * the tag from being released.
895 */
896 if (cmd != NULL && CMD_SP(cmd))
897 break;
898 }
899 spin_unlock_irqrestore(&ha->hardware_lock, flags);
900
901 /* If No Commands are pending, wait is complete */
902 if (index == ha->host->can_queue)
903 return QLA_SUCCESS;
904
905 msleep(1000);
906 }
907 /* If we timed out on waiting for commands to come back
908 * return ERROR. */
909 return QLA_ERROR;
910 }
911
912 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
913 {
914 uint32_t ctrl_status;
915 unsigned long flags = 0;
916
917 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
918
919 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
920 return QLA_ERROR;
921
922 spin_lock_irqsave(&ha->hardware_lock, flags);
923
924 /*
925 * If the SCSI Reset Interrupt bit is set, clear it.
926 * Otherwise, the Soft Reset won't work.
927 */
928 ctrl_status = readw(&ha->reg->ctrl_status);
929 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
930 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
931
932 /* Issue Soft Reset */
933 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
934 readl(&ha->reg->ctrl_status);
935
936 spin_unlock_irqrestore(&ha->hardware_lock, flags);
937 return QLA_SUCCESS;
938 }
939
940 /**
941 * qla4xxx_soft_reset - performs soft reset.
942 * @ha: Pointer to host adapter structure.
943 **/
944 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
945 {
946 uint32_t max_wait_time;
947 unsigned long flags = 0;
948 int status;
949 uint32_t ctrl_status;
950
951 status = qla4xxx_hw_reset(ha);
952 if (status != QLA_SUCCESS)
953 return status;
954
955 status = QLA_ERROR;
956 /* Wait until the Network Reset Intr bit is cleared */
957 max_wait_time = RESET_INTR_TOV;
958 do {
959 spin_lock_irqsave(&ha->hardware_lock, flags);
960 ctrl_status = readw(&ha->reg->ctrl_status);
961 spin_unlock_irqrestore(&ha->hardware_lock, flags);
962
963 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
964 break;
965
966 msleep(1000);
967 } while ((--max_wait_time));
968
969 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
970 DEBUG2(printk(KERN_WARNING
971 "scsi%ld: Network Reset Intr not cleared by "
972 "Network function, clearing it now!\n",
973 ha->host_no));
974 spin_lock_irqsave(&ha->hardware_lock, flags);
975 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
976 readl(&ha->reg->ctrl_status);
977 spin_unlock_irqrestore(&ha->hardware_lock, flags);
978 }
979
980 /* Wait until the firmware tells us the Soft Reset is done */
981 max_wait_time = SOFT_RESET_TOV;
982 do {
983 spin_lock_irqsave(&ha->hardware_lock, flags);
984 ctrl_status = readw(&ha->reg->ctrl_status);
985 spin_unlock_irqrestore(&ha->hardware_lock, flags);
986
987 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
988 status = QLA_SUCCESS;
989 break;
990 }
991
992 msleep(1000);
993 } while ((--max_wait_time));
994
995 /*
996 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
997 * after the soft reset has taken place.
998 */
999 spin_lock_irqsave(&ha->hardware_lock, flags);
1000 ctrl_status = readw(&ha->reg->ctrl_status);
1001 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
1002 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
1003 readl(&ha->reg->ctrl_status);
1004 }
1005 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1006
1007 /* If soft reset fails then most probably the bios on other
1008 * function is also enabled.
1009 * Since the initialization is sequential the other fn
1010 * wont be able to acknowledge the soft reset.
1011 * Issue a force soft reset to workaround this scenario.
1012 */
1013 if (max_wait_time == 0) {
1014 /* Issue Force Soft Reset */
1015 spin_lock_irqsave(&ha->hardware_lock, flags);
1016 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1017 readl(&ha->reg->ctrl_status);
1018 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1019 /* Wait until the firmware tells us the Soft Reset is done */
1020 max_wait_time = SOFT_RESET_TOV;
1021 do {
1022 spin_lock_irqsave(&ha->hardware_lock, flags);
1023 ctrl_status = readw(&ha->reg->ctrl_status);
1024 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1025
1026 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1027 status = QLA_SUCCESS;
1028 break;
1029 }
1030
1031 msleep(1000);
1032 } while ((--max_wait_time));
1033 }
1034
1035 return status;
1036 }
1037
1038 /**
1039 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1040 * @ha: Pointer to host adapter structure.
1041 * @res: returned scsi status
1042 *
1043 * This routine is called just prior to a HARD RESET to return all
1044 * outstanding commands back to the Operating System.
1045 * Caller should make sure that the following locks are released
1046 * before this calling routine: Hardware lock, and io_request_lock.
1047 **/
1048 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1049 {
1050 struct srb *srb;
1051 int i;
1052 unsigned long flags;
1053
1054 spin_lock_irqsave(&ha->hardware_lock, flags);
1055 for (i = 0; i < ha->host->can_queue; i++) {
1056 srb = qla4xxx_del_from_active_array(ha, i);
1057 if (srb != NULL) {
1058 srb->cmd->result = res;
1059 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1060 }
1061 }
1062 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1063 }
1064
1065 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1066 {
1067 clear_bit(AF_ONLINE, &ha->flags);
1068
1069 /* Disable the board */
1070 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1071
1072 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
1073 qla4xxx_mark_all_devices_missing(ha);
1074 clear_bit(AF_INIT_DONE, &ha->flags);
1075 }
1076
1077 /**
1078 * qla4xxx_recover_adapter - recovers adapter after a fatal error
1079 * @ha: Pointer to host adapter structure.
1080 **/
1081 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha)
1082 {
1083 int status = QLA_ERROR;
1084 uint8_t reset_chip = 0;
1085
1086 /* Stall incoming I/O until we are done */
1087 scsi_block_requests(ha->host);
1088 clear_bit(AF_ONLINE, &ha->flags);
1089
1090 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: adapter OFFLINE\n", __func__));
1091
1092 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1093
1094 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1095 reset_chip = 1;
1096
1097 /* For the DPC_RESET_HA_INTR case (ISP-4xxx specific)
1098 * do not reset adapter, jump to initialize_adapter */
1099 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1100 status = QLA_SUCCESS;
1101 goto recover_ha_init_adapter;
1102 }
1103
1104 /* For the ISP-82xx adapter, issue a stop_firmware if invoked
1105 * from eh_host_reset or ioctl module */
1106 if (is_qla8022(ha) && !reset_chip &&
1107 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags)) {
1108
1109 DEBUG2(ql4_printk(KERN_INFO, ha,
1110 "scsi%ld: %s - Performing stop_firmware...\n",
1111 ha->host_no, __func__));
1112 status = ha->isp_ops->reset_firmware(ha);
1113 if (status == QLA_SUCCESS) {
1114 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1115 qla4xxx_cmd_wait(ha);
1116 ha->isp_ops->disable_intrs(ha);
1117 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1118 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1119 } else {
1120 /* If the stop_firmware fails then
1121 * reset the entire chip */
1122 reset_chip = 1;
1123 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1124 set_bit(DPC_RESET_HA, &ha->dpc_flags);
1125 }
1126 }
1127
1128 /* Issue full chip reset if recovering from a catastrophic error,
1129 * or if stop_firmware fails for ISP-82xx.
1130 * This is the default case for ISP-4xxx */
1131 if (!is_qla8022(ha) || reset_chip) {
1132 if (!test_bit(AF_FW_RECOVERY, &ha->flags))
1133 qla4xxx_cmd_wait(ha);
1134 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1135 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1136 DEBUG2(ql4_printk(KERN_INFO, ha,
1137 "scsi%ld: %s - Performing chip reset..\n",
1138 ha->host_no, __func__));
1139 status = ha->isp_ops->reset_chip(ha);
1140 }
1141
1142 /* Flush any pending ddb changed AENs */
1143 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1144
1145 recover_ha_init_adapter:
1146 /* Upon successful firmware/chip reset, re-initialize the adapter */
1147 if (status == QLA_SUCCESS) {
1148 /* For ISP-4xxx, force function 1 to always initialize
1149 * before function 3 to prevent both funcions from
1150 * stepping on top of the other */
1151 if (!is_qla8022(ha) && (ha->mac_index == 3))
1152 ssleep(6);
1153
1154 /* NOTE: AF_ONLINE flag set upon successful completion of
1155 * qla4xxx_initialize_adapter */
1156 status = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
1157 }
1158
1159 /* Retry failed adapter initialization, if necessary
1160 * Do not retry initialize_adapter for RESET_HA_INTR (ISP-4xxx specific)
1161 * case to prevent ping-pong resets between functions */
1162 if (!test_bit(AF_ONLINE, &ha->flags) &&
1163 !test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1164 /* Adapter initialization failed, see if we can retry
1165 * resetting the ha.
1166 * Since we don't want to block the DPC for too long
1167 * with multiple resets in the same thread,
1168 * utilize DPC to retry */
1169 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
1170 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
1171 DEBUG2(printk("scsi%ld: recover adapter - retrying "
1172 "(%d) more times\n", ha->host_no,
1173 ha->retry_reset_ha_cnt));
1174 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1175 status = QLA_ERROR;
1176 } else {
1177 if (ha->retry_reset_ha_cnt > 0) {
1178 /* Schedule another Reset HA--DPC will retry */
1179 ha->retry_reset_ha_cnt--;
1180 DEBUG2(printk("scsi%ld: recover adapter - "
1181 "retry remaining %d\n",
1182 ha->host_no,
1183 ha->retry_reset_ha_cnt));
1184 status = QLA_ERROR;
1185 }
1186
1187 if (ha->retry_reset_ha_cnt == 0) {
1188 /* Recover adapter retries have been exhausted.
1189 * Adapter DEAD */
1190 DEBUG2(printk("scsi%ld: recover adapter "
1191 "failed - board disabled\n",
1192 ha->host_no));
1193 qla4xxx_dead_adapter_cleanup(ha);
1194 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1195 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1196 clear_bit(DPC_RESET_HA_FW_CONTEXT,
1197 &ha->dpc_flags);
1198 status = QLA_ERROR;
1199 }
1200 }
1201 } else {
1202 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1203 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1204 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
1205 }
1206
1207 ha->adapter_error_count++;
1208
1209 if (test_bit(AF_ONLINE, &ha->flags))
1210 ha->isp_ops->enable_intrs(ha);
1211
1212 scsi_unblock_requests(ha->host);
1213
1214 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
1215 DEBUG2(printk("scsi%ld: recover adapter: %s\n", ha->host_no,
1216 status == QLA_ERROR ? "FAILED" : "SUCCEEDED"));
1217
1218 return status;
1219 }
1220
1221 static void qla4xxx_relogin_all_devices(struct scsi_qla_host *ha)
1222 {
1223 struct ddb_entry *ddb_entry, *dtemp;
1224
1225 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
1226 if ((atomic_read(&ddb_entry->state) == DDB_STATE_MISSING) ||
1227 (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD)) {
1228 if (ddb_entry->fw_ddb_device_state ==
1229 DDB_DS_SESSION_ACTIVE) {
1230 atomic_set(&ddb_entry->state, DDB_STATE_ONLINE);
1231 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: ddb[%d]"
1232 " marked ONLINE\n", ha->host_no, __func__,
1233 ddb_entry->fw_ddb_index);
1234
1235 iscsi_unblock_session(ddb_entry->sess);
1236 } else
1237 qla4xxx_relogin_device(ha, ddb_entry);
1238 }
1239 }
1240 }
1241
1242 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1243 {
1244 if (ha->dpc_thread &&
1245 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1246 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1247 queue_work(ha->dpc_thread, &ha->dpc_work);
1248 }
1249 }
1250
1251 /**
1252 * qla4xxx_do_dpc - dpc routine
1253 * @data: in our case pointer to adapter structure
1254 *
1255 * This routine is a task that is schedule by the interrupt handler
1256 * to perform the background processing for interrupts. We put it
1257 * on a task queue that is consumed whenever the scheduler runs; that's
1258 * so you can do anything (i.e. put the process to sleep etc). In fact,
1259 * the mid-level tries to sleep when it reaches the driver threshold
1260 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1261 **/
1262 static void qla4xxx_do_dpc(struct work_struct *work)
1263 {
1264 struct scsi_qla_host *ha =
1265 container_of(work, struct scsi_qla_host, dpc_work);
1266 struct ddb_entry *ddb_entry, *dtemp;
1267 int status = QLA_ERROR;
1268
1269 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1270 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1271 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1272
1273 /* Initialization not yet finished. Don't do anything yet. */
1274 if (!test_bit(AF_INIT_DONE, &ha->flags))
1275 goto do_dpc_exit;
1276
1277 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1278 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1279 ha->host_no, __func__, ha->flags));
1280 goto do_dpc_exit;
1281 }
1282
1283 if (is_qla8022(ha)) {
1284 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1285 qla4_8xxx_idc_lock(ha);
1286 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1287 QLA82XX_DEV_FAILED);
1288 qla4_8xxx_idc_unlock(ha);
1289 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1290 qla4_8xxx_device_state_handler(ha);
1291 }
1292 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1293 qla4_8xxx_need_qsnt_handler(ha);
1294 }
1295 }
1296
1297 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1298 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1299 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1300 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1301 if (ql4xdontresethba) {
1302 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1303 ha->host_no, __func__));
1304 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1305 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1306 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1307 goto dpc_post_reset_ha;
1308 }
1309 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1310 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1311 qla4xxx_recover_adapter(ha);
1312
1313 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1314 uint8_t wait_time = RESET_INTR_TOV;
1315
1316 while ((readw(&ha->reg->ctrl_status) &
1317 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1318 if (--wait_time == 0)
1319 break;
1320 msleep(1000);
1321 }
1322 if (wait_time == 0)
1323 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1324 "bit not cleared-- resetting\n",
1325 ha->host_no, __func__));
1326 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1327 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1328 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1329 status = qla4xxx_recover_adapter(ha);
1330 }
1331 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1332 if (status == QLA_SUCCESS)
1333 ha->isp_ops->enable_intrs(ha);
1334 }
1335 }
1336
1337 dpc_post_reset_ha:
1338 /* ---- process AEN? --- */
1339 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1340 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1341
1342 /* ---- Get DHCP IP Address? --- */
1343 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1344 qla4xxx_get_dhcp_ip_address(ha);
1345
1346 /* ---- link change? --- */
1347 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1348 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1349 /* ---- link down? --- */
1350 qla4xxx_mark_all_devices_missing(ha);
1351 } else {
1352 /* ---- link up? --- *
1353 * F/W will auto login to all devices ONLY ONCE after
1354 * link up during driver initialization and runtime
1355 * fatal error recovery. Therefore, the driver must
1356 * manually relogin to devices when recovering from
1357 * connection failures, logouts, expired KATO, etc. */
1358
1359 qla4xxx_relogin_all_devices(ha);
1360 }
1361 }
1362
1363 /* ---- relogin device? --- */
1364 if (adapter_up(ha) &&
1365 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1366 list_for_each_entry_safe(ddb_entry, dtemp,
1367 &ha->ddb_list, list) {
1368 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1369 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1370 qla4xxx_relogin_device(ha, ddb_entry);
1371
1372 /*
1373 * If mbx cmd times out there is no point
1374 * in continuing further.
1375 * With large no of targets this can hang
1376 * the system.
1377 */
1378 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1379 printk(KERN_WARNING "scsi%ld: %s: "
1380 "need to reset hba\n",
1381 ha->host_no, __func__);
1382 break;
1383 }
1384 }
1385 }
1386
1387 do_dpc_exit:
1388 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1389 }
1390
1391 /**
1392 * qla4xxx_free_adapter - release the adapter
1393 * @ha: pointer to adapter structure
1394 **/
1395 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1396 {
1397
1398 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1399 /* Turn-off interrupts on the card. */
1400 ha->isp_ops->disable_intrs(ha);
1401 }
1402
1403 /* Remove timer thread, if present */
1404 if (ha->timer_active)
1405 qla4xxx_stop_timer(ha);
1406
1407 /* Kill the kernel thread for this host */
1408 if (ha->dpc_thread)
1409 destroy_workqueue(ha->dpc_thread);
1410
1411 /* Put firmware in known state */
1412 ha->isp_ops->reset_firmware(ha);
1413
1414 if (is_qla8022(ha)) {
1415 qla4_8xxx_idc_lock(ha);
1416 qla4_8xxx_clear_drv_active(ha);
1417 qla4_8xxx_idc_unlock(ha);
1418 }
1419
1420 /* Detach interrupts */
1421 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1422 qla4xxx_free_irqs(ha);
1423
1424 /* free extra memory */
1425 qla4xxx_mem_free(ha);
1426 }
1427
1428 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1429 {
1430 int status = 0;
1431 uint8_t revision_id;
1432 unsigned long mem_base, mem_len, db_base, db_len;
1433 struct pci_dev *pdev = ha->pdev;
1434
1435 status = pci_request_regions(pdev, DRIVER_NAME);
1436 if (status) {
1437 printk(KERN_WARNING
1438 "scsi(%ld) Failed to reserve PIO regions (%s) "
1439 "status=%d\n", ha->host_no, pci_name(pdev), status);
1440 goto iospace_error_exit;
1441 }
1442
1443 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1444 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1445 __func__, revision_id));
1446 ha->revision_id = revision_id;
1447
1448 /* remap phys address */
1449 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1450 mem_len = pci_resource_len(pdev, 0);
1451 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1452 __func__, mem_base, mem_len));
1453
1454 /* mapping of pcibase pointer */
1455 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1456 if (!ha->nx_pcibase) {
1457 printk(KERN_ERR
1458 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1459 pci_release_regions(ha->pdev);
1460 goto iospace_error_exit;
1461 }
1462
1463 /* Mapping of IO base pointer, door bell read and write pointer */
1464
1465 /* mapping of IO base pointer */
1466 ha->qla4_8xxx_reg =
1467 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1468 0xbc000 + (ha->pdev->devfn << 11));
1469
1470 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1471 db_len = pci_resource_len(pdev, 4);
1472
1473 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1474 QLA82XX_CAM_RAM_DB2);
1475
1476 return 0;
1477 iospace_error_exit:
1478 return -ENOMEM;
1479 }
1480
1481 /***
1482 * qla4xxx_iospace_config - maps registers
1483 * @ha: pointer to adapter structure
1484 *
1485 * This routines maps HBA's registers from the pci address space
1486 * into the kernel virtual address space for memory mapped i/o.
1487 **/
1488 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1489 {
1490 unsigned long pio, pio_len, pio_flags;
1491 unsigned long mmio, mmio_len, mmio_flags;
1492
1493 pio = pci_resource_start(ha->pdev, 0);
1494 pio_len = pci_resource_len(ha->pdev, 0);
1495 pio_flags = pci_resource_flags(ha->pdev, 0);
1496 if (pio_flags & IORESOURCE_IO) {
1497 if (pio_len < MIN_IOBASE_LEN) {
1498 ql4_printk(KERN_WARNING, ha,
1499 "Invalid PCI I/O region size\n");
1500 pio = 0;
1501 }
1502 } else {
1503 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1504 pio = 0;
1505 }
1506
1507 /* Use MMIO operations for all accesses. */
1508 mmio = pci_resource_start(ha->pdev, 1);
1509 mmio_len = pci_resource_len(ha->pdev, 1);
1510 mmio_flags = pci_resource_flags(ha->pdev, 1);
1511
1512 if (!(mmio_flags & IORESOURCE_MEM)) {
1513 ql4_printk(KERN_ERR, ha,
1514 "region #0 not an MMIO resource, aborting\n");
1515
1516 goto iospace_error_exit;
1517 }
1518
1519 if (mmio_len < MIN_IOBASE_LEN) {
1520 ql4_printk(KERN_ERR, ha,
1521 "Invalid PCI mem region size, aborting\n");
1522 goto iospace_error_exit;
1523 }
1524
1525 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1526 ql4_printk(KERN_WARNING, ha,
1527 "Failed to reserve PIO/MMIO regions\n");
1528
1529 goto iospace_error_exit;
1530 }
1531
1532 ha->pio_address = pio;
1533 ha->pio_length = pio_len;
1534 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1535 if (!ha->reg) {
1536 ql4_printk(KERN_ERR, ha,
1537 "cannot remap MMIO, aborting\n");
1538
1539 goto iospace_error_exit;
1540 }
1541
1542 return 0;
1543
1544 iospace_error_exit:
1545 return -ENOMEM;
1546 }
1547
1548 static struct isp_operations qla4xxx_isp_ops = {
1549 .iospace_config = qla4xxx_iospace_config,
1550 .pci_config = qla4xxx_pci_config,
1551 .disable_intrs = qla4xxx_disable_intrs,
1552 .enable_intrs = qla4xxx_enable_intrs,
1553 .start_firmware = qla4xxx_start_firmware,
1554 .intr_handler = qla4xxx_intr_handler,
1555 .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1556 .reset_chip = qla4xxx_soft_reset,
1557 .reset_firmware = qla4xxx_hw_reset,
1558 .queue_iocb = qla4xxx_queue_iocb,
1559 .complete_iocb = qla4xxx_complete_iocb,
1560 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out,
1561 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in,
1562 .get_sys_info = qla4xxx_get_sys_info,
1563 };
1564
1565 static struct isp_operations qla4_8xxx_isp_ops = {
1566 .iospace_config = qla4_8xxx_iospace_config,
1567 .pci_config = qla4_8xxx_pci_config,
1568 .disable_intrs = qla4_8xxx_disable_intrs,
1569 .enable_intrs = qla4_8xxx_enable_intrs,
1570 .start_firmware = qla4_8xxx_load_risc,
1571 .intr_handler = qla4_8xxx_intr_handler,
1572 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1573 .reset_chip = qla4_8xxx_isp_reset,
1574 .reset_firmware = qla4_8xxx_stop_firmware,
1575 .queue_iocb = qla4_8xxx_queue_iocb,
1576 .complete_iocb = qla4_8xxx_complete_iocb,
1577 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out,
1578 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in,
1579 .get_sys_info = qla4_8xxx_get_sys_info,
1580 };
1581
1582 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1583 {
1584 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1585 }
1586
1587 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1588 {
1589 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1590 }
1591
1592 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1593 {
1594 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1595 }
1596
1597 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1598 {
1599 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1600 }
1601
1602 /**
1603 * qla4xxx_probe_adapter - callback function to probe HBA
1604 * @pdev: pointer to pci_dev structure
1605 * @pci_device_id: pointer to pci_device entry
1606 *
1607 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1608 * It returns zero if successful. It also initializes all data necessary for
1609 * the driver.
1610 **/
1611 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1612 const struct pci_device_id *ent)
1613 {
1614 int ret = -ENODEV, status;
1615 struct Scsi_Host *host;
1616 struct scsi_qla_host *ha;
1617 uint8_t init_retry_count = 0;
1618 char buf[34];
1619 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1620 uint32_t dev_state;
1621
1622 if (pci_enable_device(pdev))
1623 return -1;
1624
1625 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1626 if (host == NULL) {
1627 printk(KERN_WARNING
1628 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1629 goto probe_disable_device;
1630 }
1631
1632 /* Clear our data area */
1633 ha = (struct scsi_qla_host *) host->hostdata;
1634 memset(ha, 0, sizeof(*ha));
1635
1636 /* Save the information from PCI BIOS. */
1637 ha->pdev = pdev;
1638 ha->host = host;
1639 ha->host_no = host->host_no;
1640
1641 pci_enable_pcie_error_reporting(pdev);
1642
1643 /* Setup Runtime configurable options */
1644 if (is_qla8022(ha)) {
1645 ha->isp_ops = &qla4_8xxx_isp_ops;
1646 rwlock_init(&ha->hw_lock);
1647 ha->qdr_sn_window = -1;
1648 ha->ddr_mn_window = -1;
1649 ha->curr_window = 255;
1650 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1651 nx_legacy_intr = &legacy_intr[ha->func_num];
1652 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1653 ha->nx_legacy_intr.tgt_status_reg =
1654 nx_legacy_intr->tgt_status_reg;
1655 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1656 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1657 } else {
1658 ha->isp_ops = &qla4xxx_isp_ops;
1659 }
1660
1661 /* Set EEH reset type to fundamental if required by hba */
1662 if (is_qla8022(ha))
1663 pdev->needs_freset = 1;
1664
1665 /* Configure PCI I/O space. */
1666 ret = ha->isp_ops->iospace_config(ha);
1667 if (ret)
1668 goto probe_failed_ioconfig;
1669
1670 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1671 pdev->device, pdev->irq, ha->reg);
1672
1673 qla4xxx_config_dma_addressing(ha);
1674
1675 /* Initialize lists and spinlocks. */
1676 INIT_LIST_HEAD(&ha->ddb_list);
1677 INIT_LIST_HEAD(&ha->free_srb_q);
1678
1679 mutex_init(&ha->mbox_sem);
1680 init_completion(&ha->mbx_intr_comp);
1681
1682 spin_lock_init(&ha->hardware_lock);
1683
1684 /* Allocate dma buffers */
1685 if (qla4xxx_mem_alloc(ha)) {
1686 ql4_printk(KERN_WARNING, ha,
1687 "[ERROR] Failed to allocate memory for adapter\n");
1688
1689 ret = -ENOMEM;
1690 goto probe_failed;
1691 }
1692
1693 if (is_qla8022(ha))
1694 (void) qla4_8xxx_get_flash_info(ha);
1695
1696 /*
1697 * Initialize the Host adapter request/response queues and
1698 * firmware
1699 * NOTE: interrupts enabled upon successful completion
1700 */
1701 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1702 while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1703 init_retry_count++ < MAX_INIT_RETRIES) {
1704
1705 if (is_qla8022(ha)) {
1706 qla4_8xxx_idc_lock(ha);
1707 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
1708 qla4_8xxx_idc_unlock(ha);
1709 if (dev_state == QLA82XX_DEV_FAILED) {
1710 ql4_printk(KERN_WARNING, ha, "%s: don't retry "
1711 "initialize adapter. H/W is in failed state\n",
1712 __func__);
1713 break;
1714 }
1715 }
1716 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1717 "(%d)\n", __func__, init_retry_count));
1718
1719 if (ha->isp_ops->reset_chip(ha) == QLA_ERROR)
1720 continue;
1721
1722 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1723 }
1724
1725 if (!test_bit(AF_ONLINE, &ha->flags)) {
1726 ql4_printk(KERN_WARNING, ha, "Failed to initialize adapter\n");
1727
1728 if (is_qla8022(ha) && ql4xdontresethba) {
1729 /* Put the device in failed state. */
1730 DEBUG2(printk(KERN_ERR "HW STATE: FAILED\n"));
1731 qla4_8xxx_idc_lock(ha);
1732 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1733 QLA82XX_DEV_FAILED);
1734 qla4_8xxx_idc_unlock(ha);
1735 }
1736 ret = -ENODEV;
1737 goto probe_failed;
1738 }
1739
1740 host->cmd_per_lun = 3;
1741 host->max_channel = 0;
1742 host->max_lun = MAX_LUNS - 1;
1743 host->max_id = MAX_TARGETS;
1744 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1745 host->can_queue = MAX_SRBS ;
1746 host->transportt = qla4xxx_scsi_transport;
1747
1748 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1749 if (ret) {
1750 ql4_printk(KERN_WARNING, ha,
1751 "scsi_init_shared_tag_map failed\n");
1752 goto probe_failed;
1753 }
1754
1755 /* Startup the kernel thread for this host adapter. */
1756 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1757 "qla4xxx_dpc\n", __func__));
1758 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1759 ha->dpc_thread = create_singlethread_workqueue(buf);
1760 if (!ha->dpc_thread) {
1761 ql4_printk(KERN_WARNING, ha, "Unable to start DPC thread!\n");
1762 ret = -ENODEV;
1763 goto probe_failed;
1764 }
1765 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1766
1767 /* For ISP-82XX, request_irqs is called in qla4_8xxx_load_risc
1768 * (which is called indirectly by qla4xxx_initialize_adapter),
1769 * so that irqs will be registered after crbinit but before
1770 * mbx_intr_enable.
1771 */
1772 if (!is_qla8022(ha)) {
1773 ret = qla4xxx_request_irqs(ha);
1774 if (ret) {
1775 ql4_printk(KERN_WARNING, ha, "Failed to reserve "
1776 "interrupt %d already in use.\n", pdev->irq);
1777 goto probe_failed;
1778 }
1779 }
1780
1781 pci_save_state(ha->pdev);
1782 ha->isp_ops->enable_intrs(ha);
1783
1784 /* Start timer thread. */
1785 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1786
1787 set_bit(AF_INIT_DONE, &ha->flags);
1788
1789 pci_set_drvdata(pdev, ha);
1790
1791 ret = scsi_add_host(host, &pdev->dev);
1792 if (ret)
1793 goto probe_failed;
1794
1795 printk(KERN_INFO
1796 " QLogic iSCSI HBA Driver version: %s\n"
1797 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1798 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1799 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1800 ha->patch_number, ha->build_number);
1801 scsi_scan_host(host);
1802 return 0;
1803
1804 probe_failed:
1805 qla4xxx_free_adapter(ha);
1806
1807 probe_failed_ioconfig:
1808 pci_disable_pcie_error_reporting(pdev);
1809 scsi_host_put(ha->host);
1810
1811 probe_disable_device:
1812 pci_disable_device(pdev);
1813
1814 return ret;
1815 }
1816
1817 /**
1818 * qla4xxx_prevent_other_port_reinit - prevent other port from re-initialize
1819 * @ha: pointer to adapter structure
1820 *
1821 * Mark the other ISP-4xxx port to indicate that the driver is being removed,
1822 * so that the other port will not re-initialize while in the process of
1823 * removing the ha due to driver unload or hba hotplug.
1824 **/
1825 static void qla4xxx_prevent_other_port_reinit(struct scsi_qla_host *ha)
1826 {
1827 struct scsi_qla_host *other_ha = NULL;
1828 struct pci_dev *other_pdev = NULL;
1829 int fn = ISP4XXX_PCI_FN_2;
1830
1831 /*iscsi function numbers for ISP4xxx is 1 and 3*/
1832 if (PCI_FUNC(ha->pdev->devfn) & BIT_1)
1833 fn = ISP4XXX_PCI_FN_1;
1834
1835 other_pdev =
1836 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
1837 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
1838 fn));
1839
1840 /* Get other_ha if other_pdev is valid and state is enable*/
1841 if (other_pdev) {
1842 if (atomic_read(&other_pdev->enable_cnt)) {
1843 other_ha = pci_get_drvdata(other_pdev);
1844 if (other_ha) {
1845 set_bit(AF_HA_REMOVAL, &other_ha->flags);
1846 DEBUG2(ql4_printk(KERN_INFO, ha, "%s: "
1847 "Prevent %s reinit\n", __func__,
1848 dev_name(&other_ha->pdev->dev)));
1849 }
1850 }
1851 pci_dev_put(other_pdev);
1852 }
1853 }
1854
1855 /**
1856 * qla4xxx_remove_adapter - calback function to remove adapter.
1857 * @pci_dev: PCI device pointer
1858 **/
1859 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1860 {
1861 struct scsi_qla_host *ha;
1862
1863 ha = pci_get_drvdata(pdev);
1864
1865 if (!is_qla8022(ha))
1866 qla4xxx_prevent_other_port_reinit(ha);
1867
1868 /* remove devs from iscsi_sessions to scsi_devices */
1869 qla4xxx_free_ddb_list(ha);
1870
1871 scsi_remove_host(ha->host);
1872
1873 qla4xxx_free_adapter(ha);
1874
1875 scsi_host_put(ha->host);
1876
1877 pci_disable_pcie_error_reporting(pdev);
1878 pci_disable_device(pdev);
1879 pci_set_drvdata(pdev, NULL);
1880 }
1881
1882 /**
1883 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1884 * @ha: HA context
1885 *
1886 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1887 * supported addressing method.
1888 */
1889 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1890 {
1891 int retval;
1892
1893 /* Update our PCI device dma_mask for full 64 bit mask */
1894 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1895 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1896 dev_dbg(&ha->pdev->dev,
1897 "Failed to set 64 bit PCI consistent mask; "
1898 "using 32 bit.\n");
1899 retval = pci_set_consistent_dma_mask(ha->pdev,
1900 DMA_BIT_MASK(32));
1901 }
1902 } else
1903 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1904 }
1905
1906 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1907 {
1908 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1909 struct ddb_entry *ddb = sess->dd_data;
1910 int queue_depth = QL4_DEF_QDEPTH;
1911
1912 sdev->hostdata = ddb;
1913 sdev->tagged_supported = 1;
1914
1915 if (ql4xmaxqdepth != 0 && ql4xmaxqdepth <= 0xffffU)
1916 queue_depth = ql4xmaxqdepth;
1917
1918 scsi_activate_tcq(sdev, queue_depth);
1919 return 0;
1920 }
1921
1922 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1923 {
1924 sdev->tagged_supported = 1;
1925 return 0;
1926 }
1927
1928 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1929 {
1930 scsi_deactivate_tcq(sdev, 1);
1931 }
1932
1933 /**
1934 * qla4xxx_del_from_active_array - returns an active srb
1935 * @ha: Pointer to host adapter structure.
1936 * @index: index into the active_array
1937 *
1938 * This routine removes and returns the srb at the specified index
1939 **/
1940 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1941 uint32_t index)
1942 {
1943 struct srb *srb = NULL;
1944 struct scsi_cmnd *cmd = NULL;
1945
1946 cmd = scsi_host_find_tag(ha->host, index);
1947 if (!cmd)
1948 return srb;
1949
1950 srb = (struct srb *)CMD_SP(cmd);
1951 if (!srb)
1952 return srb;
1953
1954 /* update counters */
1955 if (srb->flags & SRB_DMA_VALID) {
1956 ha->req_q_count += srb->iocb_cnt;
1957 ha->iocb_cnt -= srb->iocb_cnt;
1958 if (srb->cmd)
1959 srb->cmd->host_scribble =
1960 (unsigned char *)(unsigned long) MAX_SRBS;
1961 }
1962 return srb;
1963 }
1964
1965 /**
1966 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1967 * @ha: Pointer to host adapter structure.
1968 * @cmd: Scsi Command to wait on.
1969 *
1970 * This routine waits for the command to be returned by the Firmware
1971 * for some max time.
1972 **/
1973 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1974 struct scsi_cmnd *cmd)
1975 {
1976 int done = 0;
1977 struct srb *rp;
1978 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1979 int ret = SUCCESS;
1980
1981 /* Dont wait on command if PCI error is being handled
1982 * by PCI AER driver
1983 */
1984 if (unlikely(pci_channel_offline(ha->pdev)) ||
1985 (test_bit(AF_EEH_BUSY, &ha->flags))) {
1986 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1987 ha->host_no, __func__);
1988 return ret;
1989 }
1990
1991 do {
1992 /* Checking to see if its returned to OS */
1993 rp = (struct srb *) CMD_SP(cmd);
1994 if (rp == NULL) {
1995 done++;
1996 break;
1997 }
1998
1999 msleep(2000);
2000 } while (max_wait_time--);
2001
2002 return done;
2003 }
2004
2005 /**
2006 * qla4xxx_wait_for_hba_online - waits for HBA to come online
2007 * @ha: Pointer to host adapter structure
2008 **/
2009 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
2010 {
2011 unsigned long wait_online;
2012
2013 wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
2014 while (time_before(jiffies, wait_online)) {
2015
2016 if (adapter_up(ha))
2017 return QLA_SUCCESS;
2018
2019 msleep(2000);
2020 }
2021
2022 return QLA_ERROR;
2023 }
2024
2025 /**
2026 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
2027 * @ha: pointer to HBA
2028 * @t: target id
2029 * @l: lun id
2030 *
2031 * This function waits for all outstanding commands to a lun to complete. It
2032 * returns 0 if all pending commands are returned and 1 otherwise.
2033 **/
2034 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
2035 struct scsi_target *stgt,
2036 struct scsi_device *sdev)
2037 {
2038 int cnt;
2039 int status = 0;
2040 struct scsi_cmnd *cmd;
2041
2042 /*
2043 * Waiting for all commands for the designated target or dev
2044 * in the active array
2045 */
2046 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
2047 cmd = scsi_host_find_tag(ha->host, cnt);
2048 if (cmd && stgt == scsi_target(cmd->device) &&
2049 (!sdev || sdev == cmd->device)) {
2050 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2051 status++;
2052 break;
2053 }
2054 }
2055 }
2056 return status;
2057 }
2058
2059 /**
2060 * qla4xxx_eh_abort - callback for abort task.
2061 * @cmd: Pointer to Linux's SCSI command structure
2062 *
2063 * This routine is called by the Linux OS to abort the specified
2064 * command.
2065 **/
2066 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2067 {
2068 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2069 unsigned int id = cmd->device->id;
2070 unsigned int lun = cmd->device->lun;
2071 unsigned long serial = cmd->serial_number;
2072 unsigned long flags;
2073 struct srb *srb = NULL;
2074 int ret = SUCCESS;
2075 int wait = 0;
2076
2077 ql4_printk(KERN_INFO, ha,
2078 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2079 ha->host_no, id, lun, cmd, serial);
2080
2081 spin_lock_irqsave(&ha->hardware_lock, flags);
2082 srb = (struct srb *) CMD_SP(cmd);
2083 if (!srb) {
2084 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2085 return SUCCESS;
2086 }
2087 kref_get(&srb->srb_ref);
2088 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2089
2090 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2091 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2092 ha->host_no, id, lun));
2093 ret = FAILED;
2094 } else {
2095 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2096 ha->host_no, id, lun));
2097 wait = 1;
2098 }
2099
2100 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2101
2102 /* Wait for command to complete */
2103 if (wait) {
2104 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2105 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2106 ha->host_no, id, lun));
2107 ret = FAILED;
2108 }
2109 }
2110
2111 ql4_printk(KERN_INFO, ha,
2112 "scsi%ld:%d:%d: Abort command - %s\n",
2113 ha->host_no, id, lun, (ret == SUCCESS) ? "succeeded" : "failed");
2114
2115 return ret;
2116 }
2117
2118 /**
2119 * qla4xxx_eh_device_reset - callback for target reset.
2120 * @cmd: Pointer to Linux's SCSI command structure
2121 *
2122 * This routine is called by the Linux OS to reset all luns on the
2123 * specified target.
2124 **/
2125 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2126 {
2127 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2128 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2129 int ret = FAILED, stat;
2130
2131 if (!ddb_entry)
2132 return ret;
2133
2134 ret = iscsi_block_scsi_eh(cmd);
2135 if (ret)
2136 return ret;
2137 ret = FAILED;
2138
2139 ql4_printk(KERN_INFO, ha,
2140 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2141 cmd->device->channel, cmd->device->id, cmd->device->lun);
2142
2143 DEBUG2(printk(KERN_INFO
2144 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2145 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2146 cmd, jiffies, cmd->request->timeout / HZ,
2147 ha->dpc_flags, cmd->result, cmd->allowed));
2148
2149 /* FIXME: wait for hba to go online */
2150 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2151 if (stat != QLA_SUCCESS) {
2152 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2153 goto eh_dev_reset_done;
2154 }
2155
2156 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2157 cmd->device)) {
2158 ql4_printk(KERN_INFO, ha,
2159 "DEVICE RESET FAILED - waiting for "
2160 "commands.\n");
2161 goto eh_dev_reset_done;
2162 }
2163
2164 /* Send marker. */
2165 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2166 MM_LUN_RESET) != QLA_SUCCESS)
2167 goto eh_dev_reset_done;
2168
2169 ql4_printk(KERN_INFO, ha,
2170 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2171 ha->host_no, cmd->device->channel, cmd->device->id,
2172 cmd->device->lun);
2173
2174 ret = SUCCESS;
2175
2176 eh_dev_reset_done:
2177
2178 return ret;
2179 }
2180
2181 /**
2182 * qla4xxx_eh_target_reset - callback for target reset.
2183 * @cmd: Pointer to Linux's SCSI command structure
2184 *
2185 * This routine is called by the Linux OS to reset the target.
2186 **/
2187 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2188 {
2189 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2190 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2191 int stat, ret;
2192
2193 if (!ddb_entry)
2194 return FAILED;
2195
2196 ret = iscsi_block_scsi_eh(cmd);
2197 if (ret)
2198 return ret;
2199
2200 starget_printk(KERN_INFO, scsi_target(cmd->device),
2201 "WARM TARGET RESET ISSUED.\n");
2202
2203 DEBUG2(printk(KERN_INFO
2204 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2205 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2206 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2207 ha->dpc_flags, cmd->result, cmd->allowed));
2208
2209 stat = qla4xxx_reset_target(ha, ddb_entry);
2210 if (stat != QLA_SUCCESS) {
2211 starget_printk(KERN_INFO, scsi_target(cmd->device),
2212 "WARM TARGET RESET FAILED.\n");
2213 return FAILED;
2214 }
2215
2216 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2217 NULL)) {
2218 starget_printk(KERN_INFO, scsi_target(cmd->device),
2219 "WARM TARGET DEVICE RESET FAILED - "
2220 "waiting for commands.\n");
2221 return FAILED;
2222 }
2223
2224 /* Send marker. */
2225 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2226 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2227 starget_printk(KERN_INFO, scsi_target(cmd->device),
2228 "WARM TARGET DEVICE RESET FAILED - "
2229 "marker iocb failed.\n");
2230 return FAILED;
2231 }
2232
2233 starget_printk(KERN_INFO, scsi_target(cmd->device),
2234 "WARM TARGET RESET SUCCEEDED.\n");
2235 return SUCCESS;
2236 }
2237
2238 /**
2239 * qla4xxx_eh_host_reset - kernel callback
2240 * @cmd: Pointer to Linux's SCSI command structure
2241 *
2242 * This routine is invoked by the Linux kernel to perform fatal error
2243 * recovery on the specified adapter.
2244 **/
2245 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2246 {
2247 int return_status = FAILED;
2248 struct scsi_qla_host *ha;
2249
2250 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2251
2252 if (ql4xdontresethba) {
2253 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2254 ha->host_no, __func__));
2255 return FAILED;
2256 }
2257
2258 ql4_printk(KERN_INFO, ha,
2259 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2260 cmd->device->channel, cmd->device->id, cmd->device->lun);
2261
2262 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2263 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2264 "DEAD.\n", ha->host_no, cmd->device->channel,
2265 __func__));
2266
2267 return FAILED;
2268 }
2269
2270 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2271 if (is_qla8022(ha))
2272 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2273 else
2274 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2275 }
2276
2277 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2278 return_status = SUCCESS;
2279
2280 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2281 return_status == FAILED ? "FAILED" : "SUCCEEDED");
2282
2283 return return_status;
2284 }
2285
2286 /* PCI AER driver recovers from all correctable errors w/o
2287 * driver intervention. For uncorrectable errors PCI AER
2288 * driver calls the following device driver's callbacks
2289 *
2290 * - Fatal Errors - link_reset
2291 * - Non-Fatal Errors - driver's pci_error_detected() which
2292 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2293 *
2294 * PCI AER driver calls
2295 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2296 * returns RECOVERED or NEED_RESET if fw_hung
2297 * NEED_RESET - driver's slot_reset()
2298 * DISCONNECT - device is dead & cannot recover
2299 * RECOVERED - driver's pci_resume()
2300 */
2301 static pci_ers_result_t
2302 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2303 {
2304 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2305
2306 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2307 ha->host_no, __func__, state);
2308
2309 if (!is_aer_supported(ha))
2310 return PCI_ERS_RESULT_NONE;
2311
2312 switch (state) {
2313 case pci_channel_io_normal:
2314 clear_bit(AF_EEH_BUSY, &ha->flags);
2315 return PCI_ERS_RESULT_CAN_RECOVER;
2316 case pci_channel_io_frozen:
2317 set_bit(AF_EEH_BUSY, &ha->flags);
2318 qla4xxx_mailbox_premature_completion(ha);
2319 qla4xxx_free_irqs(ha);
2320 pci_disable_device(pdev);
2321 /* Return back all IOs */
2322 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2323 return PCI_ERS_RESULT_NEED_RESET;
2324 case pci_channel_io_perm_failure:
2325 set_bit(AF_EEH_BUSY, &ha->flags);
2326 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2327 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2328 return PCI_ERS_RESULT_DISCONNECT;
2329 }
2330 return PCI_ERS_RESULT_NEED_RESET;
2331 }
2332
2333 /**
2334 * qla4xxx_pci_mmio_enabled() gets called if
2335 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2336 * and read/write to the device still works.
2337 **/
2338 static pci_ers_result_t
2339 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2340 {
2341 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2342
2343 if (!is_aer_supported(ha))
2344 return PCI_ERS_RESULT_NONE;
2345
2346 return PCI_ERS_RESULT_RECOVERED;
2347 }
2348
2349 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2350 {
2351 uint32_t rval = QLA_ERROR;
2352 uint32_t ret = 0;
2353 int fn;
2354 struct pci_dev *other_pdev = NULL;
2355
2356 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2357
2358 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2359
2360 if (test_bit(AF_ONLINE, &ha->flags)) {
2361 clear_bit(AF_ONLINE, &ha->flags);
2362 qla4xxx_mark_all_devices_missing(ha);
2363 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2364 }
2365
2366 fn = PCI_FUNC(ha->pdev->devfn);
2367 while (fn > 0) {
2368 fn--;
2369 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2370 "func %x\n", ha->host_no, __func__, fn);
2371 /* Get the pci device given the domain, bus,
2372 * slot/function number */
2373 other_pdev =
2374 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2375 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2376 fn));
2377
2378 if (!other_pdev)
2379 continue;
2380
2381 if (atomic_read(&other_pdev->enable_cnt)) {
2382 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2383 "func in enabled state%x\n", ha->host_no,
2384 __func__, fn);
2385 pci_dev_put(other_pdev);
2386 break;
2387 }
2388 pci_dev_put(other_pdev);
2389 }
2390
2391 /* The first function on the card, the reset owner will
2392 * start & initialize the firmware. The other functions
2393 * on the card will reset the firmware context
2394 */
2395 if (!fn) {
2396 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2397 "0x%x is the owner\n", ha->host_no, __func__,
2398 ha->pdev->devfn);
2399
2400 qla4_8xxx_idc_lock(ha);
2401 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2402 QLA82XX_DEV_COLD);
2403
2404 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2405 QLA82XX_IDC_VERSION);
2406
2407 qla4_8xxx_idc_unlock(ha);
2408 clear_bit(AF_FW_RECOVERY, &ha->flags);
2409 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2410 qla4_8xxx_idc_lock(ha);
2411
2412 if (rval != QLA_SUCCESS) {
2413 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2414 "FAILED\n", ha->host_no, __func__);
2415 qla4_8xxx_clear_drv_active(ha);
2416 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2417 QLA82XX_DEV_FAILED);
2418 } else {
2419 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2420 "READY\n", ha->host_no, __func__);
2421 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2422 QLA82XX_DEV_READY);
2423 /* Clear driver state register */
2424 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2425 qla4_8xxx_set_drv_active(ha);
2426 ret = qla4xxx_request_irqs(ha);
2427 if (ret) {
2428 ql4_printk(KERN_WARNING, ha, "Failed to "
2429 "reserve interrupt %d already in use.\n",
2430 ha->pdev->irq);
2431 rval = QLA_ERROR;
2432 } else {
2433 ha->isp_ops->enable_intrs(ha);
2434 rval = QLA_SUCCESS;
2435 }
2436 }
2437 qla4_8xxx_idc_unlock(ha);
2438 } else {
2439 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2440 "the reset owner\n", ha->host_no, __func__,
2441 ha->pdev->devfn);
2442 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2443 QLA82XX_DEV_READY)) {
2444 clear_bit(AF_FW_RECOVERY, &ha->flags);
2445 rval = qla4xxx_initialize_adapter(ha,
2446 PRESERVE_DDB_LIST);
2447 if (rval == QLA_SUCCESS) {
2448 ret = qla4xxx_request_irqs(ha);
2449 if (ret) {
2450 ql4_printk(KERN_WARNING, ha, "Failed to"
2451 " reserve interrupt %d already in"
2452 " use.\n", ha->pdev->irq);
2453 rval = QLA_ERROR;
2454 } else {
2455 ha->isp_ops->enable_intrs(ha);
2456 rval = QLA_SUCCESS;
2457 }
2458 }
2459 qla4_8xxx_idc_lock(ha);
2460 qla4_8xxx_set_drv_active(ha);
2461 qla4_8xxx_idc_unlock(ha);
2462 }
2463 }
2464 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2465 return rval;
2466 }
2467
2468 static pci_ers_result_t
2469 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2470 {
2471 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2472 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2473 int rc;
2474
2475 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2476 ha->host_no, __func__);
2477
2478 if (!is_aer_supported(ha))
2479 return PCI_ERS_RESULT_NONE;
2480
2481 /* Restore the saved state of PCIe device -
2482 * BAR registers, PCI Config space, PCIX, MSI,
2483 * IOV states
2484 */
2485 pci_restore_state(pdev);
2486
2487 /* pci_restore_state() clears the saved_state flag of the device
2488 * save restored state which resets saved_state flag
2489 */
2490 pci_save_state(pdev);
2491
2492 /* Initialize device or resume if in suspended state */
2493 rc = pci_enable_device(pdev);
2494 if (rc) {
2495 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Can't re-enable "
2496 "device after reset\n", ha->host_no, __func__);
2497 goto exit_slot_reset;
2498 }
2499
2500 ha->isp_ops->disable_intrs(ha);
2501
2502 if (is_qla8022(ha)) {
2503 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2504 ret = PCI_ERS_RESULT_RECOVERED;
2505 goto exit_slot_reset;
2506 } else
2507 goto exit_slot_reset;
2508 }
2509
2510 exit_slot_reset:
2511 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2512 "device after reset\n", ha->host_no, __func__, ret);
2513 return ret;
2514 }
2515
2516 static void
2517 qla4xxx_pci_resume(struct pci_dev *pdev)
2518 {
2519 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2520 int ret;
2521
2522 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2523 ha->host_no, __func__);
2524
2525 ret = qla4xxx_wait_for_hba_online(ha);
2526 if (ret != QLA_SUCCESS) {
2527 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2528 "resume I/O from slot/link_reset\n", ha->host_no,
2529 __func__);
2530 }
2531
2532 pci_cleanup_aer_uncorrect_error_status(pdev);
2533 clear_bit(AF_EEH_BUSY, &ha->flags);
2534 }
2535
2536 static struct pci_error_handlers qla4xxx_err_handler = {
2537 .error_detected = qla4xxx_pci_error_detected,
2538 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2539 .slot_reset = qla4xxx_pci_slot_reset,
2540 .resume = qla4xxx_pci_resume,
2541 };
2542
2543 static struct pci_device_id qla4xxx_pci_tbl[] = {
2544 {
2545 .vendor = PCI_VENDOR_ID_QLOGIC,
2546 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2547 .subvendor = PCI_ANY_ID,
2548 .subdevice = PCI_ANY_ID,
2549 },
2550 {
2551 .vendor = PCI_VENDOR_ID_QLOGIC,
2552 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2553 .subvendor = PCI_ANY_ID,
2554 .subdevice = PCI_ANY_ID,
2555 },
2556 {
2557 .vendor = PCI_VENDOR_ID_QLOGIC,
2558 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2559 .subvendor = PCI_ANY_ID,
2560 .subdevice = PCI_ANY_ID,
2561 },
2562 {
2563 .vendor = PCI_VENDOR_ID_QLOGIC,
2564 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2565 .subvendor = PCI_ANY_ID,
2566 .subdevice = PCI_ANY_ID,
2567 },
2568 {0, 0},
2569 };
2570 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2571
2572 static struct pci_driver qla4xxx_pci_driver = {
2573 .name = DRIVER_NAME,
2574 .id_table = qla4xxx_pci_tbl,
2575 .probe = qla4xxx_probe_adapter,
2576 .remove = qla4xxx_remove_adapter,
2577 .err_handler = &qla4xxx_err_handler,
2578 };
2579
2580 static int __init qla4xxx_module_init(void)
2581 {
2582 int ret;
2583
2584 /* Allocate cache for SRBs. */
2585 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2586 SLAB_HWCACHE_ALIGN, NULL);
2587 if (srb_cachep == NULL) {
2588 printk(KERN_ERR
2589 "%s: Unable to allocate SRB cache..."
2590 "Failing load!\n", DRIVER_NAME);
2591 ret = -ENOMEM;
2592 goto no_srp_cache;
2593 }
2594
2595 /* Derive version string. */
2596 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2597 if (ql4xextended_error_logging)
2598 strcat(qla4xxx_version_str, "-debug");
2599
2600 qla4xxx_scsi_transport =
2601 iscsi_register_transport(&qla4xxx_iscsi_transport);
2602 if (!qla4xxx_scsi_transport){
2603 ret = -ENODEV;
2604 goto release_srb_cache;
2605 }
2606
2607 ret = pci_register_driver(&qla4xxx_pci_driver);
2608 if (ret)
2609 goto unregister_transport;
2610
2611 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2612 return 0;
2613
2614 unregister_transport:
2615 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2616 release_srb_cache:
2617 kmem_cache_destroy(srb_cachep);
2618 no_srp_cache:
2619 return ret;
2620 }
2621
2622 static void __exit qla4xxx_module_exit(void)
2623 {
2624 pci_unregister_driver(&qla4xxx_pci_driver);
2625 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2626 kmem_cache_destroy(srb_cachep);
2627 }
2628
2629 module_init(qla4xxx_module_init);
2630 module_exit(qla4xxx_module_exit);
2631
2632 MODULE_AUTHOR("QLogic Corporation");
2633 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2634 MODULE_LICENSE("GPL");
2635 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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