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Merge branch 'linux-next' of git://git.infradead.org/ubi-2.6
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / scsi / qla4xxx / ql4_os.c
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 ql4xdiscoverywait = 60;
33 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IWUSR);
34 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
35
36 int ql4xdontresethba = 0;
37 module_param(ql4xdontresethba, int, S_IRUGO | S_IWUSR);
38 MODULE_PARM_DESC(ql4xdontresethba,
39 "Don't reset the HBA for driver recovery \n"
40 " 0 - It will reset HBA (Default)\n"
41 " 1 - It will NOT reset HBA");
42
43 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
44 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IWUSR);
45 MODULE_PARM_DESC(ql4xextended_error_logging,
46 "Option to enable extended error logging, "
47 "Default is 0 - no logging, 1 - debug logging");
48
49 int ql4xenablemsix = 1;
50 module_param(ql4xenablemsix, int, S_IRUGO|S_IWUSR);
51 MODULE_PARM_DESC(ql4xenablemsix,
52 "Set to enable MSI or MSI-X interrupt mechanism.\n"
53 " 0 = enable INTx interrupt mechanism.\n"
54 " 1 = enable MSI-X interrupt mechanism (Default).\n"
55 " 2 = enable MSI interrupt mechanism.");
56
57 #define QL4_DEF_QDEPTH 32
58
59 /*
60 * SCSI host template entry points
61 */
62 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
63
64 /*
65 * iSCSI template entry points
66 */
67 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
68 enum iscsi_tgt_dscvr type, uint32_t enable,
69 struct sockaddr *dst_addr);
70 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
71 enum iscsi_param param, char *buf);
72 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
73 enum iscsi_param param, char *buf);
74 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
75 enum iscsi_host_param param, char *buf);
76 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
77 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
78
79 /*
80 * SCSI host template entry points
81 */
82 static int qla4xxx_queuecommand(struct Scsi_Host *h, struct scsi_cmnd *cmd);
83 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd);
84 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
85 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
86 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
87 static int qla4xxx_slave_alloc(struct scsi_device *device);
88 static int qla4xxx_slave_configure(struct scsi_device *device);
89 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
90 static void qla4xxx_scan_start(struct Scsi_Host *shost);
91
92 static struct qla4_8xxx_legacy_intr_set legacy_intr[] =
93 QLA82XX_LEGACY_INTR_CONFIG;
94
95 static struct scsi_host_template qla4xxx_driver_template = {
96 .module = THIS_MODULE,
97 .name = DRIVER_NAME,
98 .proc_name = DRIVER_NAME,
99 .queuecommand = qla4xxx_queuecommand,
100
101 .eh_abort_handler = qla4xxx_eh_abort,
102 .eh_device_reset_handler = qla4xxx_eh_device_reset,
103 .eh_target_reset_handler = qla4xxx_eh_target_reset,
104 .eh_host_reset_handler = qla4xxx_eh_host_reset,
105 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
106
107 .slave_configure = qla4xxx_slave_configure,
108 .slave_alloc = qla4xxx_slave_alloc,
109 .slave_destroy = qla4xxx_slave_destroy,
110
111 .scan_finished = iscsi_scan_finished,
112 .scan_start = qla4xxx_scan_start,
113
114 .this_id = -1,
115 .cmd_per_lun = 3,
116 .use_clustering = ENABLE_CLUSTERING,
117 .sg_tablesize = SG_ALL,
118
119 .max_sectors = 0xFFFF,
120 };
121
122 static struct iscsi_transport qla4xxx_iscsi_transport = {
123 .owner = THIS_MODULE,
124 .name = DRIVER_NAME,
125 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
126 CAP_DATA_PATH_OFFLOAD,
127 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
128 ISCSI_TARGET_NAME | ISCSI_TPGT |
129 ISCSI_TARGET_ALIAS,
130 .host_param_mask = ISCSI_HOST_HWADDRESS |
131 ISCSI_HOST_IPADDRESS |
132 ISCSI_HOST_INITIATOR_NAME,
133 .tgt_dscvr = qla4xxx_tgt_dscvr,
134 .get_conn_param = qla4xxx_conn_get_param,
135 .get_session_param = qla4xxx_sess_get_param,
136 .get_host_param = qla4xxx_host_get_param,
137 .session_recovery_timedout = qla4xxx_recovery_timedout,
138 };
139
140 static struct scsi_transport_template *qla4xxx_scsi_transport;
141
142 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
143 {
144 struct iscsi_cls_session *session;
145 struct ddb_entry *ddb_entry;
146
147 session = starget_to_session(scsi_target(sc->device));
148 ddb_entry = session->dd_data;
149
150 /* if we are not logged in then the LLD is going to clean up the cmd */
151 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
152 return BLK_EH_RESET_TIMER;
153 else
154 return BLK_EH_NOT_HANDLED;
155 }
156
157 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
158 {
159 struct ddb_entry *ddb_entry = session->dd_data;
160 struct scsi_qla_host *ha = ddb_entry->ha;
161
162 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
163 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
164
165 DEBUG2(printk("scsi%ld: %s: ddb [%d] session recovery timeout "
166 "of (%d) secs exhausted, marking device DEAD.\n",
167 ha->host_no, __func__, ddb_entry->fw_ddb_index,
168 QL4_SESS_RECOVERY_TMO));
169 }
170 }
171
172 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
173 enum iscsi_host_param param, char *buf)
174 {
175 struct scsi_qla_host *ha = to_qla_host(shost);
176 int len;
177
178 switch (param) {
179 case ISCSI_HOST_PARAM_HWADDRESS:
180 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
181 break;
182 case ISCSI_HOST_PARAM_IPADDRESS:
183 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
184 ha->ip_address[1], ha->ip_address[2],
185 ha->ip_address[3]);
186 break;
187 case ISCSI_HOST_PARAM_INITIATOR_NAME:
188 len = sprintf(buf, "%s\n", ha->name_string);
189 break;
190 default:
191 return -ENOSYS;
192 }
193
194 return len;
195 }
196
197 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
198 enum iscsi_param param, char *buf)
199 {
200 struct ddb_entry *ddb_entry = sess->dd_data;
201 int len;
202
203 switch (param) {
204 case ISCSI_PARAM_TARGET_NAME:
205 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
206 ddb_entry->iscsi_name);
207 break;
208 case ISCSI_PARAM_TPGT:
209 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
210 break;
211 case ISCSI_PARAM_TARGET_ALIAS:
212 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
213 ddb_entry->iscsi_alias);
214 break;
215 default:
216 return -ENOSYS;
217 }
218
219 return len;
220 }
221
222 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
223 enum iscsi_param param, char *buf)
224 {
225 struct iscsi_cls_session *session;
226 struct ddb_entry *ddb_entry;
227 int len;
228
229 session = iscsi_dev_to_session(conn->dev.parent);
230 ddb_entry = session->dd_data;
231
232 switch (param) {
233 case ISCSI_PARAM_CONN_PORT:
234 len = sprintf(buf, "%hu\n", ddb_entry->port);
235 break;
236 case ISCSI_PARAM_CONN_ADDRESS:
237 /* TODO: what are the ipv6 bits */
238 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
239 break;
240 default:
241 return -ENOSYS;
242 }
243
244 return len;
245 }
246
247 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
248 enum iscsi_tgt_dscvr type, uint32_t enable,
249 struct sockaddr *dst_addr)
250 {
251 struct scsi_qla_host *ha;
252 struct sockaddr_in *addr;
253 struct sockaddr_in6 *addr6;
254 int ret = 0;
255
256 ha = (struct scsi_qla_host *) shost->hostdata;
257
258 switch (type) {
259 case ISCSI_TGT_DSCVR_SEND_TARGETS:
260 if (dst_addr->sa_family == AF_INET) {
261 addr = (struct sockaddr_in *)dst_addr;
262 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
263 addr->sin_port) != QLA_SUCCESS)
264 ret = -EIO;
265 } else if (dst_addr->sa_family == AF_INET6) {
266 /*
267 * TODO: fix qla4xxx_send_tgts
268 */
269 addr6 = (struct sockaddr_in6 *)dst_addr;
270 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
271 addr6->sin6_port) != QLA_SUCCESS)
272 ret = -EIO;
273 } else
274 ret = -ENOSYS;
275 break;
276 default:
277 ret = -ENOSYS;
278 }
279 return ret;
280 }
281
282 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
283 {
284 if (!ddb_entry->sess)
285 return;
286
287 if (ddb_entry->conn) {
288 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
289 iscsi_remove_session(ddb_entry->sess);
290 }
291 iscsi_free_session(ddb_entry->sess);
292 }
293
294 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
295 {
296 int err;
297
298 ddb_entry->sess->recovery_tmo = QL4_SESS_RECOVERY_TMO;
299
300 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
301 if (err) {
302 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
303 return err;
304 }
305
306 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
307 if (!ddb_entry->conn) {
308 iscsi_remove_session(ddb_entry->sess);
309 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
310 return -ENOMEM;
311 }
312
313 /* finally ready to go */
314 iscsi_unblock_session(ddb_entry->sess);
315 return 0;
316 }
317
318 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
319 {
320 struct ddb_entry *ddb_entry;
321 struct iscsi_cls_session *sess;
322
323 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
324 sizeof(struct ddb_entry));
325 if (!sess)
326 return NULL;
327
328 ddb_entry = sess->dd_data;
329 memset(ddb_entry, 0, sizeof(*ddb_entry));
330 ddb_entry->ha = ha;
331 ddb_entry->sess = sess;
332 return ddb_entry;
333 }
334
335 static void qla4xxx_scan_start(struct Scsi_Host *shost)
336 {
337 struct scsi_qla_host *ha = shost_priv(shost);
338 struct ddb_entry *ddb_entry, *ddbtemp;
339
340 /* finish setup of sessions that were already setup in firmware */
341 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
342 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
343 qla4xxx_add_sess(ddb_entry);
344 }
345 }
346
347 /*
348 * Timer routines
349 */
350
351 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
352 unsigned long interval)
353 {
354 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
355 __func__, ha->host->host_no));
356 init_timer(&ha->timer);
357 ha->timer.expires = jiffies + interval * HZ;
358 ha->timer.data = (unsigned long)ha;
359 ha->timer.function = (void (*)(unsigned long))func;
360 add_timer(&ha->timer);
361 ha->timer_active = 1;
362 }
363
364 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
365 {
366 del_timer_sync(&ha->timer);
367 ha->timer_active = 0;
368 }
369
370 /***
371 * qla4xxx_mark_device_missing - mark a device as missing.
372 * @ha: Pointer to host adapter structure.
373 * @ddb_entry: Pointer to device database entry
374 *
375 * This routine marks a device missing and close connection.
376 **/
377 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
378 struct ddb_entry *ddb_entry)
379 {
380 if ((atomic_read(&ddb_entry->state) != DDB_STATE_DEAD)) {
381 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
382 DEBUG2(printk("scsi%ld: ddb [%d] marked MISSING\n",
383 ha->host_no, ddb_entry->fw_ddb_index));
384 } else
385 DEBUG2(printk("scsi%ld: ddb [%d] DEAD\n", ha->host_no,
386 ddb_entry->fw_ddb_index))
387
388 iscsi_block_session(ddb_entry->sess);
389 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
390 }
391
392 /**
393 * qla4xxx_mark_all_devices_missing - mark all devices as missing.
394 * @ha: Pointer to host adapter structure.
395 *
396 * This routine marks a device missing and resets the relogin retry count.
397 **/
398 void qla4xxx_mark_all_devices_missing(struct scsi_qla_host *ha)
399 {
400 struct ddb_entry *ddb_entry, *ddbtemp;
401 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
402 qla4xxx_mark_device_missing(ha, ddb_entry);
403 }
404 }
405
406 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
407 struct ddb_entry *ddb_entry,
408 struct scsi_cmnd *cmd,
409 void (*done)(struct scsi_cmnd *))
410 {
411 struct srb *srb;
412
413 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
414 if (!srb)
415 return srb;
416
417 kref_init(&srb->srb_ref);
418 srb->ha = ha;
419 srb->ddb = ddb_entry;
420 srb->cmd = cmd;
421 srb->flags = 0;
422 CMD_SP(cmd) = (void *)srb;
423 cmd->scsi_done = done;
424
425 return srb;
426 }
427
428 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
429 {
430 struct scsi_cmnd *cmd = srb->cmd;
431
432 if (srb->flags & SRB_DMA_VALID) {
433 scsi_dma_unmap(cmd);
434 srb->flags &= ~SRB_DMA_VALID;
435 }
436 CMD_SP(cmd) = NULL;
437 }
438
439 void qla4xxx_srb_compl(struct kref *ref)
440 {
441 struct srb *srb = container_of(ref, struct srb, srb_ref);
442 struct scsi_cmnd *cmd = srb->cmd;
443 struct scsi_qla_host *ha = srb->ha;
444
445 qla4xxx_srb_free_dma(ha, srb);
446
447 mempool_free(srb, ha->srb_mempool);
448
449 cmd->scsi_done(cmd);
450 }
451
452 /**
453 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
454 * @cmd: Pointer to Linux's SCSI command structure
455 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
456 * that the command has been processed.
457 *
458 * Remarks:
459 * This routine is invoked by Linux to send a SCSI command to the driver.
460 * The mid-level driver tries to ensure that queuecommand never gets
461 * invoked concurrently with itself or the interrupt handler (although
462 * the interrupt handler may call this routine as part of request-
463 * completion handling). Unfortunely, it sometimes calls the scheduler
464 * in interrupt context which is a big NO! NO!.
465 **/
466 static int qla4xxx_queuecommand_lck(struct scsi_cmnd *cmd,
467 void (*done)(struct scsi_cmnd *))
468 {
469 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
470 struct ddb_entry *ddb_entry = cmd->device->hostdata;
471 struct iscsi_cls_session *sess = ddb_entry->sess;
472 struct srb *srb;
473 int rval;
474
475 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
476 if (test_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags))
477 cmd->result = DID_NO_CONNECT << 16;
478 else
479 cmd->result = DID_REQUEUE << 16;
480 goto qc_fail_command;
481 }
482
483 if (!sess) {
484 cmd->result = DID_IMM_RETRY << 16;
485 goto qc_fail_command;
486 }
487
488 rval = iscsi_session_chkready(sess);
489 if (rval) {
490 cmd->result = rval;
491 goto qc_fail_command;
492 }
493
494 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
495 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
496 cmd->result = DID_NO_CONNECT << 16;
497 goto qc_fail_command;
498 }
499 return SCSI_MLQUEUE_TARGET_BUSY;
500 }
501
502 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
503 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
504 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
505 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
506 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
507 !test_bit(AF_ONLINE, &ha->flags) ||
508 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))
509 goto qc_host_busy;
510
511 spin_unlock_irq(ha->host->host_lock);
512
513 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
514 if (!srb)
515 goto qc_host_busy_lock;
516
517 rval = qla4xxx_send_command_to_isp(ha, srb);
518 if (rval != QLA_SUCCESS)
519 goto qc_host_busy_free_sp;
520
521 spin_lock_irq(ha->host->host_lock);
522 return 0;
523
524 qc_host_busy_free_sp:
525 qla4xxx_srb_free_dma(ha, srb);
526 mempool_free(srb, ha->srb_mempool);
527
528 qc_host_busy_lock:
529 spin_lock_irq(ha->host->host_lock);
530
531 qc_host_busy:
532 return SCSI_MLQUEUE_HOST_BUSY;
533
534 qc_fail_command:
535 done(cmd);
536
537 return 0;
538 }
539
540 static DEF_SCSI_QCMD(qla4xxx_queuecommand)
541
542 /**
543 * qla4xxx_mem_free - frees memory allocated to adapter
544 * @ha: Pointer to host adapter structure.
545 *
546 * Frees memory previously allocated by qla4xxx_mem_alloc
547 **/
548 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
549 {
550 if (ha->queues)
551 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
552 ha->queues_dma);
553
554 ha->queues_len = 0;
555 ha->queues = NULL;
556 ha->queues_dma = 0;
557 ha->request_ring = NULL;
558 ha->request_dma = 0;
559 ha->response_ring = NULL;
560 ha->response_dma = 0;
561 ha->shadow_regs = NULL;
562 ha->shadow_regs_dma = 0;
563
564 /* Free srb pool. */
565 if (ha->srb_mempool)
566 mempool_destroy(ha->srb_mempool);
567
568 ha->srb_mempool = NULL;
569
570 /* release io space registers */
571 if (is_qla8022(ha)) {
572 if (ha->nx_pcibase)
573 iounmap(
574 (struct device_reg_82xx __iomem *)ha->nx_pcibase);
575 } else if (ha->reg)
576 iounmap(ha->reg);
577 pci_release_regions(ha->pdev);
578 }
579
580 /**
581 * qla4xxx_mem_alloc - allocates memory for use by adapter.
582 * @ha: Pointer to host adapter structure
583 *
584 * Allocates DMA memory for request and response queues. Also allocates memory
585 * for srbs.
586 **/
587 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
588 {
589 unsigned long align;
590
591 /* Allocate contiguous block of DMA memory for queues. */
592 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
593 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
594 sizeof(struct shadow_regs) +
595 MEM_ALIGN_VALUE +
596 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
597 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
598 &ha->queues_dma, GFP_KERNEL);
599 if (ha->queues == NULL) {
600 ql4_printk(KERN_WARNING, ha,
601 "Memory Allocation failed - queues.\n");
602
603 goto mem_alloc_error_exit;
604 }
605 memset(ha->queues, 0, ha->queues_len);
606
607 /*
608 * As per RISC alignment requirements -- the bus-address must be a
609 * multiple of the request-ring size (in bytes).
610 */
611 align = 0;
612 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
613 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
614 (MEM_ALIGN_VALUE - 1));
615
616 /* Update request and response queue pointers. */
617 ha->request_dma = ha->queues_dma + align;
618 ha->request_ring = (struct queue_entry *) (ha->queues + align);
619 ha->response_dma = ha->queues_dma + align +
620 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
621 ha->response_ring = (struct queue_entry *) (ha->queues + align +
622 (REQUEST_QUEUE_DEPTH *
623 QUEUE_SIZE));
624 ha->shadow_regs_dma = ha->queues_dma + align +
625 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
626 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
627 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
628 (REQUEST_QUEUE_DEPTH *
629 QUEUE_SIZE) +
630 (RESPONSE_QUEUE_DEPTH *
631 QUEUE_SIZE));
632
633 /* Allocate memory for srb pool. */
634 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
635 mempool_free_slab, srb_cachep);
636 if (ha->srb_mempool == NULL) {
637 ql4_printk(KERN_WARNING, ha,
638 "Memory Allocation failed - SRB Pool.\n");
639
640 goto mem_alloc_error_exit;
641 }
642
643 return QLA_SUCCESS;
644
645 mem_alloc_error_exit:
646 qla4xxx_mem_free(ha);
647 return QLA_ERROR;
648 }
649
650 /**
651 * qla4_8xxx_check_fw_alive - Check firmware health
652 * @ha: Pointer to host adapter structure.
653 *
654 * Context: Interrupt
655 **/
656 static void qla4_8xxx_check_fw_alive(struct scsi_qla_host *ha)
657 {
658 uint32_t fw_heartbeat_counter, halt_status;
659
660 fw_heartbeat_counter = qla4_8xxx_rd_32(ha, QLA82XX_PEG_ALIVE_COUNTER);
661 /* If PEG_ALIVE_COUNTER is 0xffffffff, AER/EEH is in progress, ignore */
662 if (fw_heartbeat_counter == 0xffffffff) {
663 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: Device in frozen "
664 "state, QLA82XX_PEG_ALIVE_COUNTER is 0xffffffff\n",
665 ha->host_no, __func__));
666 return;
667 }
668
669 if (ha->fw_heartbeat_counter == fw_heartbeat_counter) {
670 ha->seconds_since_last_heartbeat++;
671 /* FW not alive after 2 seconds */
672 if (ha->seconds_since_last_heartbeat == 2) {
673 ha->seconds_since_last_heartbeat = 0;
674 halt_status = qla4_8xxx_rd_32(ha,
675 QLA82XX_PEG_HALT_STATUS1);
676
677 /* Since we cannot change dev_state in interrupt
678 * context, set appropriate DPC flag then wakeup
679 * DPC */
680 if (halt_status & HALT_STATUS_UNRECOVERABLE)
681 set_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags);
682 else {
683 printk("scsi%ld: %s: detect abort needed!\n",
684 ha->host_no, __func__);
685 set_bit(DPC_RESET_HA, &ha->dpc_flags);
686 }
687 qla4xxx_wake_dpc(ha);
688 qla4xxx_mailbox_premature_completion(ha);
689 }
690 } else
691 ha->seconds_since_last_heartbeat = 0;
692
693 ha->fw_heartbeat_counter = fw_heartbeat_counter;
694 }
695
696 /**
697 * qla4_8xxx_watchdog - Poll dev state
698 * @ha: Pointer to host adapter structure.
699 *
700 * Context: Interrupt
701 **/
702 void qla4_8xxx_watchdog(struct scsi_qla_host *ha)
703 {
704 uint32_t dev_state;
705
706 dev_state = qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE);
707
708 /* don't poll if reset is going on */
709 if (!(test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) ||
710 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
711 test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags))) {
712 if (dev_state == QLA82XX_DEV_NEED_RESET &&
713 !test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
714 if (!ql4xdontresethba) {
715 ql4_printk(KERN_INFO, ha, "%s: HW State: "
716 "NEED RESET!\n", __func__);
717 set_bit(DPC_RESET_HA, &ha->dpc_flags);
718 qla4xxx_wake_dpc(ha);
719 qla4xxx_mailbox_premature_completion(ha);
720 }
721 } else if (dev_state == QLA82XX_DEV_NEED_QUIESCENT &&
722 !test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
723 ql4_printk(KERN_INFO, ha, "%s: HW State: NEED QUIES!\n",
724 __func__);
725 set_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags);
726 qla4xxx_wake_dpc(ha);
727 } else {
728 /* Check firmware health */
729 qla4_8xxx_check_fw_alive(ha);
730 }
731 }
732 }
733
734 /**
735 * qla4xxx_timer - checks every second for work to do.
736 * @ha: Pointer to host adapter structure.
737 **/
738 static void qla4xxx_timer(struct scsi_qla_host *ha)
739 {
740 struct ddb_entry *ddb_entry, *dtemp;
741 int start_dpc = 0;
742 uint16_t w;
743
744 /* If we are in the middle of AER/EEH processing
745 * skip any processing and reschedule the timer
746 */
747 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
748 mod_timer(&ha->timer, jiffies + HZ);
749 return;
750 }
751
752 /* Hardware read to trigger an EEH error during mailbox waits. */
753 if (!pci_channel_offline(ha->pdev))
754 pci_read_config_word(ha->pdev, PCI_VENDOR_ID, &w);
755
756 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags)) {
757 DEBUG2(ql4_printk(KERN_INFO, ha, "%s exited. HBA GOING AWAY\n",
758 __func__));
759 return;
760 }
761
762 if (is_qla8022(ha)) {
763 qla4_8xxx_watchdog(ha);
764 }
765
766 /* Search for relogin's to time-out and port down retry. */
767 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
768 /* Count down time between sending relogins */
769 if (adapter_up(ha) &&
770 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
771 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
772 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
773 INVALID_ENTRY) {
774 if (atomic_read(&ddb_entry->retry_relogin_timer)
775 == 0) {
776 atomic_set(&ddb_entry->
777 retry_relogin_timer,
778 INVALID_ENTRY);
779 set_bit(DPC_RELOGIN_DEVICE,
780 &ha->dpc_flags);
781 set_bit(DF_RELOGIN, &ddb_entry->flags);
782 DEBUG2(printk("scsi%ld: %s: ddb [%d]"
783 " login device\n",
784 ha->host_no, __func__,
785 ddb_entry->fw_ddb_index));
786 } else
787 atomic_dec(&ddb_entry->
788 retry_relogin_timer);
789 }
790 }
791
792 /* Wait for relogin to timeout */
793 if (atomic_read(&ddb_entry->relogin_timer) &&
794 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
795 /*
796 * If the relogin times out and the device is
797 * still NOT ONLINE then try and relogin again.
798 */
799 if (atomic_read(&ddb_entry->state) !=
800 DDB_STATE_ONLINE &&
801 ddb_entry->fw_ddb_device_state ==
802 DDB_DS_SESSION_FAILED) {
803 /* Reset retry relogin timer */
804 atomic_inc(&ddb_entry->relogin_retry_count);
805 DEBUG2(printk("scsi%ld: ddb [%d] relogin"
806 " timed out-retrying"
807 " relogin (%d)\n",
808 ha->host_no,
809 ddb_entry->fw_ddb_index,
810 atomic_read(&ddb_entry->
811 relogin_retry_count))
812 );
813 start_dpc++;
814 DEBUG(printk("scsi%ld:%d:%d: ddb [%d] "
815 "initiate relogin after"
816 " %d seconds\n",
817 ha->host_no, ddb_entry->bus,
818 ddb_entry->target,
819 ddb_entry->fw_ddb_index,
820 ddb_entry->default_time2wait + 4)
821 );
822
823 atomic_set(&ddb_entry->retry_relogin_timer,
824 ddb_entry->default_time2wait + 4);
825 }
826 }
827 }
828
829 if (!is_qla8022(ha)) {
830 /* Check for heartbeat interval. */
831 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
832 ha->heartbeat_interval != 0) {
833 ha->seconds_since_last_heartbeat++;
834 if (ha->seconds_since_last_heartbeat >
835 ha->heartbeat_interval + 2)
836 set_bit(DPC_RESET_HA, &ha->dpc_flags);
837 }
838 }
839
840 /* Wakeup the dpc routine for this adapter, if needed. */
841 if ((start_dpc ||
842 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
843 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
844 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
845 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
846 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
847 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
848 test_bit(DPC_LINK_CHANGED, &ha->dpc_flags) ||
849 test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags) ||
850 test_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags) ||
851 test_bit(DPC_AEN, &ha->dpc_flags)) &&
852 !test_bit(AF_DPC_SCHEDULED, &ha->flags) &&
853 ha->dpc_thread) {
854 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
855 " - dpc flags = 0x%lx\n",
856 ha->host_no, __func__, ha->dpc_flags));
857 qla4xxx_wake_dpc(ha);
858 }
859
860 /* Reschedule timer thread to call us back in one second */
861 mod_timer(&ha->timer, jiffies + HZ);
862
863 DEBUG2(ha->seconds_since_last_intr++);
864 }
865
866 /**
867 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
868 * @ha: Pointer to host adapter structure.
869 *
870 * This routine stalls the driver until all outstanding commands are returned.
871 * Caller must release the Hardware Lock prior to calling this routine.
872 **/
873 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
874 {
875 uint32_t index = 0;
876 unsigned long flags;
877 struct scsi_cmnd *cmd;
878
879 unsigned long wtime = jiffies + (WAIT_CMD_TOV * HZ);
880
881 DEBUG2(ql4_printk(KERN_INFO, ha, "Wait up to %d seconds for cmds to "
882 "complete\n", WAIT_CMD_TOV));
883
884 while (!time_after_eq(jiffies, wtime)) {
885 spin_lock_irqsave(&ha->hardware_lock, flags);
886 /* Find a command that hasn't completed. */
887 for (index = 0; index < ha->host->can_queue; index++) {
888 cmd = scsi_host_find_tag(ha->host, index);
889 /*
890 * We cannot just check if the index is valid,
891 * becase if we are run from the scsi eh, then
892 * the scsi/block layer is going to prevent
893 * the tag from being released.
894 */
895 if (cmd != NULL && CMD_SP(cmd))
896 break;
897 }
898 spin_unlock_irqrestore(&ha->hardware_lock, flags);
899
900 /* If No Commands are pending, wait is complete */
901 if (index == ha->host->can_queue)
902 return QLA_SUCCESS;
903
904 msleep(1000);
905 }
906 /* If we timed out on waiting for commands to come back
907 * return ERROR. */
908 return QLA_ERROR;
909 }
910
911 int qla4xxx_hw_reset(struct scsi_qla_host *ha)
912 {
913 uint32_t ctrl_status;
914 unsigned long flags = 0;
915
916 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
917
918 if (ql4xxx_lock_drvr_wait(ha) != QLA_SUCCESS)
919 return QLA_ERROR;
920
921 spin_lock_irqsave(&ha->hardware_lock, flags);
922
923 /*
924 * If the SCSI Reset Interrupt bit is set, clear it.
925 * Otherwise, the Soft Reset won't work.
926 */
927 ctrl_status = readw(&ha->reg->ctrl_status);
928 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
929 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
930
931 /* Issue Soft Reset */
932 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
933 readl(&ha->reg->ctrl_status);
934
935 spin_unlock_irqrestore(&ha->hardware_lock, flags);
936 return QLA_SUCCESS;
937 }
938
939 /**
940 * qla4xxx_soft_reset - performs soft reset.
941 * @ha: Pointer to host adapter structure.
942 **/
943 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
944 {
945 uint32_t max_wait_time;
946 unsigned long flags = 0;
947 int status;
948 uint32_t ctrl_status;
949
950 status = qla4xxx_hw_reset(ha);
951 if (status != QLA_SUCCESS)
952 return status;
953
954 status = QLA_ERROR;
955 /* Wait until the Network Reset Intr bit is cleared */
956 max_wait_time = RESET_INTR_TOV;
957 do {
958 spin_lock_irqsave(&ha->hardware_lock, flags);
959 ctrl_status = readw(&ha->reg->ctrl_status);
960 spin_unlock_irqrestore(&ha->hardware_lock, flags);
961
962 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
963 break;
964
965 msleep(1000);
966 } while ((--max_wait_time));
967
968 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
969 DEBUG2(printk(KERN_WARNING
970 "scsi%ld: Network Reset Intr not cleared by "
971 "Network function, clearing it now!\n",
972 ha->host_no));
973 spin_lock_irqsave(&ha->hardware_lock, flags);
974 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
975 readl(&ha->reg->ctrl_status);
976 spin_unlock_irqrestore(&ha->hardware_lock, flags);
977 }
978
979 /* Wait until the firmware tells us the Soft Reset is done */
980 max_wait_time = SOFT_RESET_TOV;
981 do {
982 spin_lock_irqsave(&ha->hardware_lock, flags);
983 ctrl_status = readw(&ha->reg->ctrl_status);
984 spin_unlock_irqrestore(&ha->hardware_lock, flags);
985
986 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
987 status = QLA_SUCCESS;
988 break;
989 }
990
991 msleep(1000);
992 } while ((--max_wait_time));
993
994 /*
995 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
996 * after the soft reset has taken place.
997 */
998 spin_lock_irqsave(&ha->hardware_lock, flags);
999 ctrl_status = readw(&ha->reg->ctrl_status);
1000 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
1001 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
1002 readl(&ha->reg->ctrl_status);
1003 }
1004 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1005
1006 /* If soft reset fails then most probably the bios on other
1007 * function is also enabled.
1008 * Since the initialization is sequential the other fn
1009 * wont be able to acknowledge the soft reset.
1010 * Issue a force soft reset to workaround this scenario.
1011 */
1012 if (max_wait_time == 0) {
1013 /* Issue Force Soft Reset */
1014 spin_lock_irqsave(&ha->hardware_lock, flags);
1015 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
1016 readl(&ha->reg->ctrl_status);
1017 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1018 /* Wait until the firmware tells us the Soft Reset is done */
1019 max_wait_time = SOFT_RESET_TOV;
1020 do {
1021 spin_lock_irqsave(&ha->hardware_lock, flags);
1022 ctrl_status = readw(&ha->reg->ctrl_status);
1023 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1024
1025 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
1026 status = QLA_SUCCESS;
1027 break;
1028 }
1029
1030 msleep(1000);
1031 } while ((--max_wait_time));
1032 }
1033
1034 return status;
1035 }
1036
1037 /**
1038 * qla4xxx_abort_active_cmds - returns all outstanding i/o requests to O.S.
1039 * @ha: Pointer to host adapter structure.
1040 * @res: returned scsi status
1041 *
1042 * This routine is called just prior to a HARD RESET to return all
1043 * outstanding commands back to the Operating System.
1044 * Caller should make sure that the following locks are released
1045 * before this calling routine: Hardware lock, and io_request_lock.
1046 **/
1047 static void qla4xxx_abort_active_cmds(struct scsi_qla_host *ha, int res)
1048 {
1049 struct srb *srb;
1050 int i;
1051 unsigned long flags;
1052
1053 spin_lock_irqsave(&ha->hardware_lock, flags);
1054 for (i = 0; i < ha->host->can_queue; i++) {
1055 srb = qla4xxx_del_from_active_array(ha, i);
1056 if (srb != NULL) {
1057 srb->cmd->result = res;
1058 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
1059 }
1060 }
1061 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1062 }
1063
1064 void qla4xxx_dead_adapter_cleanup(struct scsi_qla_host *ha)
1065 {
1066 clear_bit(AF_ONLINE, &ha->flags);
1067
1068 /* Disable the board */
1069 ql4_printk(KERN_INFO, ha, "Disabling the board\n");
1070 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
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" : "SUCCEDED"));
1217
1218 return status;
1219 }
1220
1221 void qla4xxx_wake_dpc(struct scsi_qla_host *ha)
1222 {
1223 if (ha->dpc_thread &&
1224 !test_bit(AF_DPC_SCHEDULED, &ha->flags)) {
1225 set_bit(AF_DPC_SCHEDULED, &ha->flags);
1226 queue_work(ha->dpc_thread, &ha->dpc_work);
1227 }
1228 }
1229
1230 /**
1231 * qla4xxx_do_dpc - dpc routine
1232 * @data: in our case pointer to adapter structure
1233 *
1234 * This routine is a task that is schedule by the interrupt handler
1235 * to perform the background processing for interrupts. We put it
1236 * on a task queue that is consumed whenever the scheduler runs; that's
1237 * so you can do anything (i.e. put the process to sleep etc). In fact,
1238 * the mid-level tries to sleep when it reaches the driver threshold
1239 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1240 **/
1241 static void qla4xxx_do_dpc(struct work_struct *work)
1242 {
1243 struct scsi_qla_host *ha =
1244 container_of(work, struct scsi_qla_host, dpc_work);
1245 struct ddb_entry *ddb_entry, *dtemp;
1246 int status = QLA_ERROR;
1247
1248 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1249 "flags = 0x%08lx, dpc_flags = 0x%08lx\n",
1250 ha->host_no, __func__, ha->flags, ha->dpc_flags))
1251
1252 /* Initialization not yet finished. Don't do anything yet. */
1253 if (!test_bit(AF_INIT_DONE, &ha->flags))
1254 goto do_dpc_exit;
1255
1256 if (test_bit(AF_EEH_BUSY, &ha->flags)) {
1257 DEBUG2(printk(KERN_INFO "scsi%ld: %s: flags = %lx\n",
1258 ha->host_no, __func__, ha->flags));
1259 goto do_dpc_exit;
1260 }
1261
1262 /* HBA is in the process of being permanently disabled.
1263 * Don't process anything */
1264 if (test_bit(AF_HBA_GOING_AWAY, &ha->flags))
1265 return;
1266
1267 if (is_qla8022(ha)) {
1268 if (test_bit(DPC_HA_UNRECOVERABLE, &ha->dpc_flags)) {
1269 qla4_8xxx_idc_lock(ha);
1270 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
1271 QLA82XX_DEV_FAILED);
1272 qla4_8xxx_idc_unlock(ha);
1273 ql4_printk(KERN_INFO, ha, "HW State: FAILED\n");
1274 qla4_8xxx_device_state_handler(ha);
1275 }
1276 if (test_and_clear_bit(DPC_HA_NEED_QUIESCENT, &ha->dpc_flags)) {
1277 qla4_8xxx_need_qsnt_handler(ha);
1278 }
1279 }
1280
1281 if (!test_bit(DPC_RESET_ACTIVE, &ha->dpc_flags) &&
1282 (test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1283 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1284 test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags))) {
1285 if (ql4xdontresethba) {
1286 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
1287 ha->host_no, __func__));
1288 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
1289 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1290 clear_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
1291 goto dpc_post_reset_ha;
1292 }
1293 if (test_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags) ||
1294 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1295 qla4xxx_recover_adapter(ha);
1296
1297 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1298 uint8_t wait_time = RESET_INTR_TOV;
1299
1300 while ((readw(&ha->reg->ctrl_status) &
1301 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1302 if (--wait_time == 0)
1303 break;
1304 msleep(1000);
1305 }
1306 if (wait_time == 0)
1307 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1308 "bit not cleared-- resetting\n",
1309 ha->host_no, __func__));
1310 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
1311 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1312 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1313 status = qla4xxx_recover_adapter(ha);
1314 }
1315 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1316 if (status == QLA_SUCCESS)
1317 ha->isp_ops->enable_intrs(ha);
1318 }
1319 }
1320
1321 dpc_post_reset_ha:
1322 /* ---- process AEN? --- */
1323 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1324 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1325
1326 /* ---- Get DHCP IP Address? --- */
1327 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1328 qla4xxx_get_dhcp_ip_address(ha);
1329
1330 /* ---- link change? --- */
1331 if (test_and_clear_bit(DPC_LINK_CHANGED, &ha->dpc_flags)) {
1332 if (!test_bit(AF_LINK_UP, &ha->flags)) {
1333 /* ---- link down? --- */
1334 list_for_each_entry_safe(ddb_entry, dtemp,
1335 &ha->ddb_list, list) {
1336 if (atomic_read(&ddb_entry->state) ==
1337 DDB_STATE_ONLINE)
1338 qla4xxx_mark_device_missing(ha,
1339 ddb_entry);
1340 }
1341 } else {
1342 /* ---- link up? --- *
1343 * F/W will auto login to all devices ONLY ONCE after
1344 * link up during driver initialization and runtime
1345 * fatal error recovery. Therefore, the driver must
1346 * manually relogin to devices when recovering from
1347 * connection failures, logouts, expired KATO, etc. */
1348
1349 list_for_each_entry_safe(ddb_entry, dtemp,
1350 &ha->ddb_list, list) {
1351 if ((atomic_read(&ddb_entry->state) ==
1352 DDB_STATE_MISSING) ||
1353 (atomic_read(&ddb_entry->state) ==
1354 DDB_STATE_DEAD)) {
1355 if (ddb_entry->fw_ddb_device_state ==
1356 DDB_DS_SESSION_ACTIVE) {
1357 atomic_set(&ddb_entry->state,
1358 DDB_STATE_ONLINE);
1359 ql4_printk(KERN_INFO, ha,
1360 "scsi%ld: %s: ddb[%d]"
1361 " marked ONLINE\n",
1362 ha->host_no, __func__,
1363 ddb_entry->fw_ddb_index);
1364
1365 iscsi_unblock_session(
1366 ddb_entry->sess);
1367 } else
1368 qla4xxx_relogin_device(
1369 ha, ddb_entry);
1370 }
1371
1372 }
1373 }
1374 }
1375
1376 /* ---- relogin device? --- */
1377 if (adapter_up(ha) &&
1378 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1379 list_for_each_entry_safe(ddb_entry, dtemp,
1380 &ha->ddb_list, list) {
1381 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1382 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1383 qla4xxx_relogin_device(ha, ddb_entry);
1384
1385 /*
1386 * If mbx cmd times out there is no point
1387 * in continuing further.
1388 * With large no of targets this can hang
1389 * the system.
1390 */
1391 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1392 printk(KERN_WARNING "scsi%ld: %s: "
1393 "need to reset hba\n",
1394 ha->host_no, __func__);
1395 break;
1396 }
1397 }
1398 }
1399
1400 do_dpc_exit:
1401 clear_bit(AF_DPC_SCHEDULED, &ha->flags);
1402 }
1403
1404 /**
1405 * qla4xxx_free_adapter - release the adapter
1406 * @ha: pointer to adapter structure
1407 **/
1408 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1409 {
1410
1411 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1412 /* Turn-off interrupts on the card. */
1413 ha->isp_ops->disable_intrs(ha);
1414 }
1415
1416 /* Remove timer thread, if present */
1417 if (ha->timer_active)
1418 qla4xxx_stop_timer(ha);
1419
1420 /* Kill the kernel thread for this host */
1421 if (ha->dpc_thread)
1422 destroy_workqueue(ha->dpc_thread);
1423
1424 /* Put firmware in known state */
1425 ha->isp_ops->reset_firmware(ha);
1426
1427 if (is_qla8022(ha)) {
1428 qla4_8xxx_idc_lock(ha);
1429 qla4_8xxx_clear_drv_active(ha);
1430 qla4_8xxx_idc_unlock(ha);
1431 }
1432
1433 /* Detach interrupts */
1434 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1435 qla4xxx_free_irqs(ha);
1436
1437 /* free extra memory */
1438 qla4xxx_mem_free(ha);
1439 }
1440
1441 int qla4_8xxx_iospace_config(struct scsi_qla_host *ha)
1442 {
1443 int status = 0;
1444 uint8_t revision_id;
1445 unsigned long mem_base, mem_len, db_base, db_len;
1446 struct pci_dev *pdev = ha->pdev;
1447
1448 status = pci_request_regions(pdev, DRIVER_NAME);
1449 if (status) {
1450 printk(KERN_WARNING
1451 "scsi(%ld) Failed to reserve PIO regions (%s) "
1452 "status=%d\n", ha->host_no, pci_name(pdev), status);
1453 goto iospace_error_exit;
1454 }
1455
1456 pci_read_config_byte(pdev, PCI_REVISION_ID, &revision_id);
1457 DEBUG2(printk(KERN_INFO "%s: revision-id=%d\n",
1458 __func__, revision_id));
1459 ha->revision_id = revision_id;
1460
1461 /* remap phys address */
1462 mem_base = pci_resource_start(pdev, 0); /* 0 is for BAR 0 */
1463 mem_len = pci_resource_len(pdev, 0);
1464 DEBUG2(printk(KERN_INFO "%s: ioremap from %lx a size of %lx\n",
1465 __func__, mem_base, mem_len));
1466
1467 /* mapping of pcibase pointer */
1468 ha->nx_pcibase = (unsigned long)ioremap(mem_base, mem_len);
1469 if (!ha->nx_pcibase) {
1470 printk(KERN_ERR
1471 "cannot remap MMIO (%s), aborting\n", pci_name(pdev));
1472 pci_release_regions(ha->pdev);
1473 goto iospace_error_exit;
1474 }
1475
1476 /* Mapping of IO base pointer, door bell read and write pointer */
1477
1478 /* mapping of IO base pointer */
1479 ha->qla4_8xxx_reg =
1480 (struct device_reg_82xx __iomem *)((uint8_t *)ha->nx_pcibase +
1481 0xbc000 + (ha->pdev->devfn << 11));
1482
1483 db_base = pci_resource_start(pdev, 4); /* doorbell is on bar 4 */
1484 db_len = pci_resource_len(pdev, 4);
1485
1486 ha->nx_db_wr_ptr = (ha->pdev->devfn == 4 ? QLA82XX_CAM_RAM_DB1 :
1487 QLA82XX_CAM_RAM_DB2);
1488
1489 return 0;
1490 iospace_error_exit:
1491 return -ENOMEM;
1492 }
1493
1494 /***
1495 * qla4xxx_iospace_config - maps registers
1496 * @ha: pointer to adapter structure
1497 *
1498 * This routines maps HBA's registers from the pci address space
1499 * into the kernel virtual address space for memory mapped i/o.
1500 **/
1501 int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1502 {
1503 unsigned long pio, pio_len, pio_flags;
1504 unsigned long mmio, mmio_len, mmio_flags;
1505
1506 pio = pci_resource_start(ha->pdev, 0);
1507 pio_len = pci_resource_len(ha->pdev, 0);
1508 pio_flags = pci_resource_flags(ha->pdev, 0);
1509 if (pio_flags & IORESOURCE_IO) {
1510 if (pio_len < MIN_IOBASE_LEN) {
1511 ql4_printk(KERN_WARNING, ha,
1512 "Invalid PCI I/O region size\n");
1513 pio = 0;
1514 }
1515 } else {
1516 ql4_printk(KERN_WARNING, ha, "region #0 not a PIO resource\n");
1517 pio = 0;
1518 }
1519
1520 /* Use MMIO operations for all accesses. */
1521 mmio = pci_resource_start(ha->pdev, 1);
1522 mmio_len = pci_resource_len(ha->pdev, 1);
1523 mmio_flags = pci_resource_flags(ha->pdev, 1);
1524
1525 if (!(mmio_flags & IORESOURCE_MEM)) {
1526 ql4_printk(KERN_ERR, ha,
1527 "region #0 not an MMIO resource, aborting\n");
1528
1529 goto iospace_error_exit;
1530 }
1531
1532 if (mmio_len < MIN_IOBASE_LEN) {
1533 ql4_printk(KERN_ERR, ha,
1534 "Invalid PCI mem region size, aborting\n");
1535 goto iospace_error_exit;
1536 }
1537
1538 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1539 ql4_printk(KERN_WARNING, ha,
1540 "Failed to reserve PIO/MMIO regions\n");
1541
1542 goto iospace_error_exit;
1543 }
1544
1545 ha->pio_address = pio;
1546 ha->pio_length = pio_len;
1547 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1548 if (!ha->reg) {
1549 ql4_printk(KERN_ERR, ha,
1550 "cannot remap MMIO, aborting\n");
1551
1552 goto iospace_error_exit;
1553 }
1554
1555 return 0;
1556
1557 iospace_error_exit:
1558 return -ENOMEM;
1559 }
1560
1561 static struct isp_operations qla4xxx_isp_ops = {
1562 .iospace_config = qla4xxx_iospace_config,
1563 .pci_config = qla4xxx_pci_config,
1564 .disable_intrs = qla4xxx_disable_intrs,
1565 .enable_intrs = qla4xxx_enable_intrs,
1566 .start_firmware = qla4xxx_start_firmware,
1567 .intr_handler = qla4xxx_intr_handler,
1568 .interrupt_service_routine = qla4xxx_interrupt_service_routine,
1569 .reset_chip = qla4xxx_soft_reset,
1570 .reset_firmware = qla4xxx_hw_reset,
1571 .queue_iocb = qla4xxx_queue_iocb,
1572 .complete_iocb = qla4xxx_complete_iocb,
1573 .rd_shdw_req_q_out = qla4xxx_rd_shdw_req_q_out,
1574 .rd_shdw_rsp_q_in = qla4xxx_rd_shdw_rsp_q_in,
1575 .get_sys_info = qla4xxx_get_sys_info,
1576 };
1577
1578 static struct isp_operations qla4_8xxx_isp_ops = {
1579 .iospace_config = qla4_8xxx_iospace_config,
1580 .pci_config = qla4_8xxx_pci_config,
1581 .disable_intrs = qla4_8xxx_disable_intrs,
1582 .enable_intrs = qla4_8xxx_enable_intrs,
1583 .start_firmware = qla4_8xxx_load_risc,
1584 .intr_handler = qla4_8xxx_intr_handler,
1585 .interrupt_service_routine = qla4_8xxx_interrupt_service_routine,
1586 .reset_chip = qla4_8xxx_isp_reset,
1587 .reset_firmware = qla4_8xxx_stop_firmware,
1588 .queue_iocb = qla4_8xxx_queue_iocb,
1589 .complete_iocb = qla4_8xxx_complete_iocb,
1590 .rd_shdw_req_q_out = qla4_8xxx_rd_shdw_req_q_out,
1591 .rd_shdw_rsp_q_in = qla4_8xxx_rd_shdw_rsp_q_in,
1592 .get_sys_info = qla4_8xxx_get_sys_info,
1593 };
1594
1595 uint16_t qla4xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1596 {
1597 return (uint16_t)le32_to_cpu(ha->shadow_regs->req_q_out);
1598 }
1599
1600 uint16_t qla4_8xxx_rd_shdw_req_q_out(struct scsi_qla_host *ha)
1601 {
1602 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->req_q_out));
1603 }
1604
1605 uint16_t qla4xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1606 {
1607 return (uint16_t)le32_to_cpu(ha->shadow_regs->rsp_q_in);
1608 }
1609
1610 uint16_t qla4_8xxx_rd_shdw_rsp_q_in(struct scsi_qla_host *ha)
1611 {
1612 return (uint16_t)le32_to_cpu(readl(&ha->qla4_8xxx_reg->rsp_q_in));
1613 }
1614
1615 /**
1616 * qla4xxx_probe_adapter - callback function to probe HBA
1617 * @pdev: pointer to pci_dev structure
1618 * @pci_device_id: pointer to pci_device entry
1619 *
1620 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1621 * It returns zero if successful. It also initializes all data necessary for
1622 * the driver.
1623 **/
1624 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1625 const struct pci_device_id *ent)
1626 {
1627 int ret = -ENODEV, status;
1628 struct Scsi_Host *host;
1629 struct scsi_qla_host *ha;
1630 uint8_t init_retry_count = 0;
1631 char buf[34];
1632 struct qla4_8xxx_legacy_intr_set *nx_legacy_intr;
1633
1634 if (pci_enable_device(pdev))
1635 return -1;
1636
1637 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1638 if (host == NULL) {
1639 printk(KERN_WARNING
1640 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1641 goto probe_disable_device;
1642 }
1643
1644 /* Clear our data area */
1645 ha = (struct scsi_qla_host *) host->hostdata;
1646 memset(ha, 0, sizeof(*ha));
1647
1648 /* Save the information from PCI BIOS. */
1649 ha->pdev = pdev;
1650 ha->host = host;
1651 ha->host_no = host->host_no;
1652
1653 pci_enable_pcie_error_reporting(pdev);
1654
1655 /* Setup Runtime configurable options */
1656 if (is_qla8022(ha)) {
1657 ha->isp_ops = &qla4_8xxx_isp_ops;
1658 rwlock_init(&ha->hw_lock);
1659 ha->qdr_sn_window = -1;
1660 ha->ddr_mn_window = -1;
1661 ha->curr_window = 255;
1662 ha->func_num = PCI_FUNC(ha->pdev->devfn);
1663 nx_legacy_intr = &legacy_intr[ha->func_num];
1664 ha->nx_legacy_intr.int_vec_bit = nx_legacy_intr->int_vec_bit;
1665 ha->nx_legacy_intr.tgt_status_reg =
1666 nx_legacy_intr->tgt_status_reg;
1667 ha->nx_legacy_intr.tgt_mask_reg = nx_legacy_intr->tgt_mask_reg;
1668 ha->nx_legacy_intr.pci_int_reg = nx_legacy_intr->pci_int_reg;
1669 } else {
1670 ha->isp_ops = &qla4xxx_isp_ops;
1671 }
1672
1673 /* Set EEH reset type to fundamental if required by hba */
1674 if (is_qla8022(ha))
1675 pdev->needs_freset = 1;
1676
1677 /* Configure PCI I/O space. */
1678 ret = ha->isp_ops->iospace_config(ha);
1679 if (ret)
1680 goto probe_failed_ioconfig;
1681
1682 ql4_printk(KERN_INFO, ha, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1683 pdev->device, pdev->irq, ha->reg);
1684
1685 qla4xxx_config_dma_addressing(ha);
1686
1687 /* Initialize lists and spinlocks. */
1688 INIT_LIST_HEAD(&ha->ddb_list);
1689 INIT_LIST_HEAD(&ha->free_srb_q);
1690
1691 mutex_init(&ha->mbox_sem);
1692 init_completion(&ha->mbx_intr_comp);
1693
1694 spin_lock_init(&ha->hardware_lock);
1695
1696 /* Allocate dma buffers */
1697 if (qla4xxx_mem_alloc(ha)) {
1698 ql4_printk(KERN_WARNING, ha,
1699 "[ERROR] Failed to allocate memory for adapter\n");
1700
1701 ret = -ENOMEM;
1702 goto probe_failed;
1703 }
1704
1705 if (is_qla8022(ha))
1706 (void) qla4_8xxx_get_flash_info(ha);
1707
1708 /*
1709 * Initialize the Host adapter request/response queues and
1710 * firmware
1711 * NOTE: interrupts enabled upon successful completion
1712 */
1713 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1714 while ((!test_bit(AF_ONLINE, &ha->flags)) &&
1715 init_retry_count++ < MAX_INIT_RETRIES) {
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_remove_adapter - calback function to remove adapter.
1819 * @pci_dev: PCI device pointer
1820 **/
1821 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1822 {
1823 struct scsi_qla_host *ha;
1824
1825 ha = pci_get_drvdata(pdev);
1826
1827 set_bit(AF_HBA_GOING_AWAY, &ha->flags);
1828
1829 /* remove devs from iscsi_sessions to scsi_devices */
1830 qla4xxx_free_ddb_list(ha);
1831
1832 scsi_remove_host(ha->host);
1833
1834 qla4xxx_free_adapter(ha);
1835
1836 scsi_host_put(ha->host);
1837
1838 pci_disable_pcie_error_reporting(pdev);
1839 pci_disable_device(pdev);
1840 pci_set_drvdata(pdev, NULL);
1841 }
1842
1843 /**
1844 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1845 * @ha: HA context
1846 *
1847 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1848 * supported addressing method.
1849 */
1850 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1851 {
1852 int retval;
1853
1854 /* Update our PCI device dma_mask for full 64 bit mask */
1855 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1856 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1857 dev_dbg(&ha->pdev->dev,
1858 "Failed to set 64 bit PCI consistent mask; "
1859 "using 32 bit.\n");
1860 retval = pci_set_consistent_dma_mask(ha->pdev,
1861 DMA_BIT_MASK(32));
1862 }
1863 } else
1864 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1865 }
1866
1867 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1868 {
1869 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1870 struct ddb_entry *ddb = sess->dd_data;
1871
1872 sdev->hostdata = ddb;
1873 sdev->tagged_supported = 1;
1874 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1875 return 0;
1876 }
1877
1878 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1879 {
1880 sdev->tagged_supported = 1;
1881 return 0;
1882 }
1883
1884 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1885 {
1886 scsi_deactivate_tcq(sdev, 1);
1887 }
1888
1889 /**
1890 * qla4xxx_del_from_active_array - returns an active srb
1891 * @ha: Pointer to host adapter structure.
1892 * @index: index into the active_array
1893 *
1894 * This routine removes and returns the srb at the specified index
1895 **/
1896 struct srb *qla4xxx_del_from_active_array(struct scsi_qla_host *ha,
1897 uint32_t index)
1898 {
1899 struct srb *srb = NULL;
1900 struct scsi_cmnd *cmd = NULL;
1901
1902 cmd = scsi_host_find_tag(ha->host, index);
1903 if (!cmd)
1904 return srb;
1905
1906 srb = (struct srb *)CMD_SP(cmd);
1907 if (!srb)
1908 return srb;
1909
1910 /* update counters */
1911 if (srb->flags & SRB_DMA_VALID) {
1912 ha->req_q_count += srb->iocb_cnt;
1913 ha->iocb_cnt -= srb->iocb_cnt;
1914 if (srb->cmd)
1915 srb->cmd->host_scribble =
1916 (unsigned char *)(unsigned long) MAX_SRBS;
1917 }
1918 return srb;
1919 }
1920
1921 /**
1922 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1923 * @ha: Pointer to host adapter structure.
1924 * @cmd: Scsi Command to wait on.
1925 *
1926 * This routine waits for the command to be returned by the Firmware
1927 * for some max time.
1928 **/
1929 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1930 struct scsi_cmnd *cmd)
1931 {
1932 int done = 0;
1933 struct srb *rp;
1934 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1935 int ret = SUCCESS;
1936
1937 /* Dont wait on command if PCI error is being handled
1938 * by PCI AER driver
1939 */
1940 if (unlikely(pci_channel_offline(ha->pdev)) ||
1941 (test_bit(AF_EEH_BUSY, &ha->flags))) {
1942 ql4_printk(KERN_WARNING, ha, "scsi%ld: Return from %s\n",
1943 ha->host_no, __func__);
1944 return ret;
1945 }
1946
1947 do {
1948 /* Checking to see if its returned to OS */
1949 rp = (struct srb *) CMD_SP(cmd);
1950 if (rp == NULL) {
1951 done++;
1952 break;
1953 }
1954
1955 msleep(2000);
1956 } while (max_wait_time--);
1957
1958 return done;
1959 }
1960
1961 /**
1962 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1963 * @ha: Pointer to host adapter structure
1964 **/
1965 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1966 {
1967 unsigned long wait_online;
1968
1969 wait_online = jiffies + (HBA_ONLINE_TOV * HZ);
1970 while (time_before(jiffies, wait_online)) {
1971
1972 if (adapter_up(ha))
1973 return QLA_SUCCESS;
1974
1975 msleep(2000);
1976 }
1977
1978 return QLA_ERROR;
1979 }
1980
1981 /**
1982 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1983 * @ha: pointer to HBA
1984 * @t: target id
1985 * @l: lun id
1986 *
1987 * This function waits for all outstanding commands to a lun to complete. It
1988 * returns 0 if all pending commands are returned and 1 otherwise.
1989 **/
1990 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1991 struct scsi_target *stgt,
1992 struct scsi_device *sdev)
1993 {
1994 int cnt;
1995 int status = 0;
1996 struct scsi_cmnd *cmd;
1997
1998 /*
1999 * Waiting for all commands for the designated target or dev
2000 * in the active array
2001 */
2002 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
2003 cmd = scsi_host_find_tag(ha->host, cnt);
2004 if (cmd && stgt == scsi_target(cmd->device) &&
2005 (!sdev || sdev == cmd->device)) {
2006 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2007 status++;
2008 break;
2009 }
2010 }
2011 }
2012 return status;
2013 }
2014
2015 /**
2016 * qla4xxx_eh_abort - callback for abort task.
2017 * @cmd: Pointer to Linux's SCSI command structure
2018 *
2019 * This routine is called by the Linux OS to abort the specified
2020 * command.
2021 **/
2022 static int qla4xxx_eh_abort(struct scsi_cmnd *cmd)
2023 {
2024 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2025 unsigned int id = cmd->device->id;
2026 unsigned int lun = cmd->device->lun;
2027 unsigned long serial = cmd->serial_number;
2028 unsigned long flags;
2029 struct srb *srb = NULL;
2030 int ret = SUCCESS;
2031 int wait = 0;
2032
2033 ql4_printk(KERN_INFO, ha,
2034 "scsi%ld:%d:%d: Abort command issued cmd=%p, pid=%ld\n",
2035 ha->host_no, id, lun, cmd, serial);
2036
2037 spin_lock_irqsave(&ha->hardware_lock, flags);
2038 srb = (struct srb *) CMD_SP(cmd);
2039 if (!srb) {
2040 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2041 return SUCCESS;
2042 }
2043 kref_get(&srb->srb_ref);
2044 spin_unlock_irqrestore(&ha->hardware_lock, flags);
2045
2046 if (qla4xxx_abort_task(ha, srb) != QLA_SUCCESS) {
2047 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx failed.\n",
2048 ha->host_no, id, lun));
2049 ret = FAILED;
2050 } else {
2051 DEBUG3(printk("scsi%ld:%d:%d: Abort_task mbx success.\n",
2052 ha->host_no, id, lun));
2053 wait = 1;
2054 }
2055
2056 kref_put(&srb->srb_ref, qla4xxx_srb_compl);
2057
2058 /* Wait for command to complete */
2059 if (wait) {
2060 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
2061 DEBUG2(printk("scsi%ld:%d:%d: Abort handler timed out\n",
2062 ha->host_no, id, lun));
2063 ret = FAILED;
2064 }
2065 }
2066
2067 ql4_printk(KERN_INFO, ha,
2068 "scsi%ld:%d:%d: Abort command - %s\n",
2069 ha->host_no, id, lun, (ret == SUCCESS) ? "succeded" : "failed");
2070
2071 return ret;
2072 }
2073
2074 /**
2075 * qla4xxx_eh_device_reset - callback for target reset.
2076 * @cmd: Pointer to Linux's SCSI command structure
2077 *
2078 * This routine is called by the Linux OS to reset all luns on the
2079 * specified target.
2080 **/
2081 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
2082 {
2083 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2084 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2085 int ret = FAILED, stat;
2086
2087 if (!ddb_entry)
2088 return ret;
2089
2090 ret = iscsi_block_scsi_eh(cmd);
2091 if (ret)
2092 return ret;
2093 ret = FAILED;
2094
2095 ql4_printk(KERN_INFO, ha,
2096 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
2097 cmd->device->channel, cmd->device->id, cmd->device->lun);
2098
2099 DEBUG2(printk(KERN_INFO
2100 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
2101 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
2102 cmd, jiffies, cmd->request->timeout / HZ,
2103 ha->dpc_flags, cmd->result, cmd->allowed));
2104
2105 /* FIXME: wait for hba to go online */
2106 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
2107 if (stat != QLA_SUCCESS) {
2108 ql4_printk(KERN_INFO, ha, "DEVICE RESET FAILED. %d\n", stat);
2109 goto eh_dev_reset_done;
2110 }
2111
2112 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2113 cmd->device)) {
2114 ql4_printk(KERN_INFO, ha,
2115 "DEVICE RESET FAILED - waiting for "
2116 "commands.\n");
2117 goto eh_dev_reset_done;
2118 }
2119
2120 /* Send marker. */
2121 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2122 MM_LUN_RESET) != QLA_SUCCESS)
2123 goto eh_dev_reset_done;
2124
2125 ql4_printk(KERN_INFO, ha,
2126 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
2127 ha->host_no, cmd->device->channel, cmd->device->id,
2128 cmd->device->lun);
2129
2130 ret = SUCCESS;
2131
2132 eh_dev_reset_done:
2133
2134 return ret;
2135 }
2136
2137 /**
2138 * qla4xxx_eh_target_reset - callback for target reset.
2139 * @cmd: Pointer to Linux's SCSI command structure
2140 *
2141 * This routine is called by the Linux OS to reset the target.
2142 **/
2143 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
2144 {
2145 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
2146 struct ddb_entry *ddb_entry = cmd->device->hostdata;
2147 int stat, ret;
2148
2149 if (!ddb_entry)
2150 return FAILED;
2151
2152 ret = iscsi_block_scsi_eh(cmd);
2153 if (ret)
2154 return ret;
2155
2156 starget_printk(KERN_INFO, scsi_target(cmd->device),
2157 "WARM TARGET RESET ISSUED.\n");
2158
2159 DEBUG2(printk(KERN_INFO
2160 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
2161 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
2162 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
2163 ha->dpc_flags, cmd->result, cmd->allowed));
2164
2165 stat = qla4xxx_reset_target(ha, ddb_entry);
2166 if (stat != QLA_SUCCESS) {
2167 starget_printk(KERN_INFO, scsi_target(cmd->device),
2168 "WARM TARGET RESET FAILED.\n");
2169 return FAILED;
2170 }
2171
2172 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
2173 NULL)) {
2174 starget_printk(KERN_INFO, scsi_target(cmd->device),
2175 "WARM TARGET DEVICE RESET FAILED - "
2176 "waiting for commands.\n");
2177 return FAILED;
2178 }
2179
2180 /* Send marker. */
2181 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
2182 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
2183 starget_printk(KERN_INFO, scsi_target(cmd->device),
2184 "WARM TARGET DEVICE RESET FAILED - "
2185 "marker iocb failed.\n");
2186 return FAILED;
2187 }
2188
2189 starget_printk(KERN_INFO, scsi_target(cmd->device),
2190 "WARM TARGET RESET SUCCEEDED.\n");
2191 return SUCCESS;
2192 }
2193
2194 /**
2195 * qla4xxx_eh_host_reset - kernel callback
2196 * @cmd: Pointer to Linux's SCSI command structure
2197 *
2198 * This routine is invoked by the Linux kernel to perform fatal error
2199 * recovery on the specified adapter.
2200 **/
2201 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
2202 {
2203 int return_status = FAILED;
2204 struct scsi_qla_host *ha;
2205
2206 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
2207
2208 if (ql4xdontresethba) {
2209 DEBUG2(printk("scsi%ld: %s: Don't Reset HBA\n",
2210 ha->host_no, __func__));
2211 return FAILED;
2212 }
2213
2214 ql4_printk(KERN_INFO, ha,
2215 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
2216 cmd->device->channel, cmd->device->id, cmd->device->lun);
2217
2218 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
2219 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
2220 "DEAD.\n", ha->host_no, cmd->device->channel,
2221 __func__));
2222
2223 return FAILED;
2224 }
2225
2226 if (!test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
2227 if (is_qla8022(ha))
2228 set_bit(DPC_RESET_HA_FW_CONTEXT, &ha->dpc_flags);
2229 else
2230 set_bit(DPC_RESET_HA, &ha->dpc_flags);
2231 }
2232
2233 if (qla4xxx_recover_adapter(ha) == QLA_SUCCESS)
2234 return_status = SUCCESS;
2235
2236 ql4_printk(KERN_INFO, ha, "HOST RESET %s.\n",
2237 return_status == FAILED ? "FAILED" : "SUCCEDED");
2238
2239 return return_status;
2240 }
2241
2242 /* PCI AER driver recovers from all correctable errors w/o
2243 * driver intervention. For uncorrectable errors PCI AER
2244 * driver calls the following device driver's callbacks
2245 *
2246 * - Fatal Errors - link_reset
2247 * - Non-Fatal Errors - driver's pci_error_detected() which
2248 * returns CAN_RECOVER, NEED_RESET or DISCONNECT.
2249 *
2250 * PCI AER driver calls
2251 * CAN_RECOVER - driver's pci_mmio_enabled(), mmio_enabled
2252 * returns RECOVERED or NEED_RESET if fw_hung
2253 * NEED_RESET - driver's slot_reset()
2254 * DISCONNECT - device is dead & cannot recover
2255 * RECOVERED - driver's pci_resume()
2256 */
2257 static pci_ers_result_t
2258 qla4xxx_pci_error_detected(struct pci_dev *pdev, pci_channel_state_t state)
2259 {
2260 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2261
2262 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: error detected:state %x\n",
2263 ha->host_no, __func__, state);
2264
2265 if (!is_aer_supported(ha))
2266 return PCI_ERS_RESULT_NONE;
2267
2268 switch (state) {
2269 case pci_channel_io_normal:
2270 clear_bit(AF_EEH_BUSY, &ha->flags);
2271 return PCI_ERS_RESULT_CAN_RECOVER;
2272 case pci_channel_io_frozen:
2273 set_bit(AF_EEH_BUSY, &ha->flags);
2274 qla4xxx_mailbox_premature_completion(ha);
2275 qla4xxx_free_irqs(ha);
2276 pci_disable_device(pdev);
2277 /* Return back all IOs */
2278 qla4xxx_abort_active_cmds(ha, DID_RESET << 16);
2279 return PCI_ERS_RESULT_NEED_RESET;
2280 case pci_channel_io_perm_failure:
2281 set_bit(AF_EEH_BUSY, &ha->flags);
2282 set_bit(AF_PCI_CHANNEL_IO_PERM_FAILURE, &ha->flags);
2283 qla4xxx_abort_active_cmds(ha, DID_NO_CONNECT << 16);
2284 return PCI_ERS_RESULT_DISCONNECT;
2285 }
2286 return PCI_ERS_RESULT_NEED_RESET;
2287 }
2288
2289 /**
2290 * qla4xxx_pci_mmio_enabled() gets called if
2291 * qla4xxx_pci_error_detected() returns PCI_ERS_RESULT_CAN_RECOVER
2292 * and read/write to the device still works.
2293 **/
2294 static pci_ers_result_t
2295 qla4xxx_pci_mmio_enabled(struct pci_dev *pdev)
2296 {
2297 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2298
2299 if (!is_aer_supported(ha))
2300 return PCI_ERS_RESULT_NONE;
2301
2302 return PCI_ERS_RESULT_RECOVERED;
2303 }
2304
2305 static uint32_t qla4_8xxx_error_recovery(struct scsi_qla_host *ha)
2306 {
2307 uint32_t rval = QLA_ERROR;
2308 uint32_t ret = 0;
2309 int fn;
2310 struct pci_dev *other_pdev = NULL;
2311
2312 ql4_printk(KERN_WARNING, ha, "scsi%ld: In %s\n", ha->host_no, __func__);
2313
2314 set_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2315
2316 if (test_bit(AF_ONLINE, &ha->flags)) {
2317 clear_bit(AF_ONLINE, &ha->flags);
2318 qla4xxx_mark_all_devices_missing(ha);
2319 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
2320 }
2321
2322 fn = PCI_FUNC(ha->pdev->devfn);
2323 while (fn > 0) {
2324 fn--;
2325 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Finding PCI device at "
2326 "func %x\n", ha->host_no, __func__, fn);
2327 /* Get the pci device given the domain, bus,
2328 * slot/function number */
2329 other_pdev =
2330 pci_get_domain_bus_and_slot(pci_domain_nr(ha->pdev->bus),
2331 ha->pdev->bus->number, PCI_DEVFN(PCI_SLOT(ha->pdev->devfn),
2332 fn));
2333
2334 if (!other_pdev)
2335 continue;
2336
2337 if (atomic_read(&other_pdev->enable_cnt)) {
2338 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: Found PCI "
2339 "func in enabled state%x\n", ha->host_no,
2340 __func__, fn);
2341 pci_dev_put(other_pdev);
2342 break;
2343 }
2344 pci_dev_put(other_pdev);
2345 }
2346
2347 /* The first function on the card, the reset owner will
2348 * start & initialize the firmware. The other functions
2349 * on the card will reset the firmware context
2350 */
2351 if (!fn) {
2352 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn being reset "
2353 "0x%x is the owner\n", ha->host_no, __func__,
2354 ha->pdev->devfn);
2355
2356 qla4_8xxx_idc_lock(ha);
2357 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2358 QLA82XX_DEV_COLD);
2359
2360 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_IDC_VERSION,
2361 QLA82XX_IDC_VERSION);
2362
2363 qla4_8xxx_idc_unlock(ha);
2364 clear_bit(AF_FW_RECOVERY, &ha->flags);
2365 rval = qla4xxx_initialize_adapter(ha, PRESERVE_DDB_LIST);
2366 qla4_8xxx_idc_lock(ha);
2367
2368 if (rval != QLA_SUCCESS) {
2369 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2370 "FAILED\n", ha->host_no, __func__);
2371 qla4_8xxx_clear_drv_active(ha);
2372 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2373 QLA82XX_DEV_FAILED);
2374 } else {
2375 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: HW State: "
2376 "READY\n", ha->host_no, __func__);
2377 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DEV_STATE,
2378 QLA82XX_DEV_READY);
2379 /* Clear driver state register */
2380 qla4_8xxx_wr_32(ha, QLA82XX_CRB_DRV_STATE, 0);
2381 qla4_8xxx_set_drv_active(ha);
2382 ret = qla4xxx_request_irqs(ha);
2383 if (ret) {
2384 ql4_printk(KERN_WARNING, ha, "Failed to "
2385 "reserve interrupt %d already in use.\n",
2386 ha->pdev->irq);
2387 rval = QLA_ERROR;
2388 } else {
2389 ha->isp_ops->enable_intrs(ha);
2390 rval = QLA_SUCCESS;
2391 }
2392 }
2393 qla4_8xxx_idc_unlock(ha);
2394 } else {
2395 ql4_printk(KERN_INFO, ha, "scsi%ld: %s: devfn 0x%x is not "
2396 "the reset owner\n", ha->host_no, __func__,
2397 ha->pdev->devfn);
2398 if ((qla4_8xxx_rd_32(ha, QLA82XX_CRB_DEV_STATE) ==
2399 QLA82XX_DEV_READY)) {
2400 clear_bit(AF_FW_RECOVERY, &ha->flags);
2401 rval = qla4xxx_initialize_adapter(ha,
2402 PRESERVE_DDB_LIST);
2403 if (rval == QLA_SUCCESS) {
2404 ret = qla4xxx_request_irqs(ha);
2405 if (ret) {
2406 ql4_printk(KERN_WARNING, ha, "Failed to"
2407 " reserve interrupt %d already in"
2408 " use.\n", ha->pdev->irq);
2409 rval = QLA_ERROR;
2410 } else {
2411 ha->isp_ops->enable_intrs(ha);
2412 rval = QLA_SUCCESS;
2413 }
2414 }
2415 qla4_8xxx_idc_lock(ha);
2416 qla4_8xxx_set_drv_active(ha);
2417 qla4_8xxx_idc_unlock(ha);
2418 }
2419 }
2420 clear_bit(DPC_RESET_ACTIVE, &ha->dpc_flags);
2421 return rval;
2422 }
2423
2424 static pci_ers_result_t
2425 qla4xxx_pci_slot_reset(struct pci_dev *pdev)
2426 {
2427 pci_ers_result_t ret = PCI_ERS_RESULT_DISCONNECT;
2428 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2429 int rc;
2430
2431 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: slot_reset\n",
2432 ha->host_no, __func__);
2433
2434 if (!is_aer_supported(ha))
2435 return PCI_ERS_RESULT_NONE;
2436
2437 /* Restore the saved state of PCIe device -
2438 * BAR registers, PCI Config space, PCIX, MSI,
2439 * IOV states
2440 */
2441 pci_restore_state(pdev);
2442
2443 /* pci_restore_state() clears the saved_state flag of the device
2444 * save restored state which resets saved_state flag
2445 */
2446 pci_save_state(pdev);
2447
2448 /* Initialize device or resume if in suspended state */
2449 rc = pci_enable_device(pdev);
2450 if (rc) {
2451 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Cant re-enable "
2452 "device after reset\n", ha->host_no, __func__);
2453 goto exit_slot_reset;
2454 }
2455
2456 ha->isp_ops->disable_intrs(ha);
2457
2458 if (is_qla8022(ha)) {
2459 if (qla4_8xxx_error_recovery(ha) == QLA_SUCCESS) {
2460 ret = PCI_ERS_RESULT_RECOVERED;
2461 goto exit_slot_reset;
2462 } else
2463 goto exit_slot_reset;
2464 }
2465
2466 exit_slot_reset:
2467 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: Return=%x\n"
2468 "device after reset\n", ha->host_no, __func__, ret);
2469 return ret;
2470 }
2471
2472 static void
2473 qla4xxx_pci_resume(struct pci_dev *pdev)
2474 {
2475 struct scsi_qla_host *ha = pci_get_drvdata(pdev);
2476 int ret;
2477
2478 ql4_printk(KERN_WARNING, ha, "scsi%ld: %s: pci_resume\n",
2479 ha->host_no, __func__);
2480
2481 ret = qla4xxx_wait_for_hba_online(ha);
2482 if (ret != QLA_SUCCESS) {
2483 ql4_printk(KERN_ERR, ha, "scsi%ld: %s: the device failed to "
2484 "resume I/O from slot/link_reset\n", ha->host_no,
2485 __func__);
2486 }
2487
2488 pci_cleanup_aer_uncorrect_error_status(pdev);
2489 clear_bit(AF_EEH_BUSY, &ha->flags);
2490 }
2491
2492 static struct pci_error_handlers qla4xxx_err_handler = {
2493 .error_detected = qla4xxx_pci_error_detected,
2494 .mmio_enabled = qla4xxx_pci_mmio_enabled,
2495 .slot_reset = qla4xxx_pci_slot_reset,
2496 .resume = qla4xxx_pci_resume,
2497 };
2498
2499 static struct pci_device_id qla4xxx_pci_tbl[] = {
2500 {
2501 .vendor = PCI_VENDOR_ID_QLOGIC,
2502 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
2503 .subvendor = PCI_ANY_ID,
2504 .subdevice = PCI_ANY_ID,
2505 },
2506 {
2507 .vendor = PCI_VENDOR_ID_QLOGIC,
2508 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
2509 .subvendor = PCI_ANY_ID,
2510 .subdevice = PCI_ANY_ID,
2511 },
2512 {
2513 .vendor = PCI_VENDOR_ID_QLOGIC,
2514 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
2515 .subvendor = PCI_ANY_ID,
2516 .subdevice = PCI_ANY_ID,
2517 },
2518 {
2519 .vendor = PCI_VENDOR_ID_QLOGIC,
2520 .device = PCI_DEVICE_ID_QLOGIC_ISP8022,
2521 .subvendor = PCI_ANY_ID,
2522 .subdevice = PCI_ANY_ID,
2523 },
2524 {0, 0},
2525 };
2526 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
2527
2528 static struct pci_driver qla4xxx_pci_driver = {
2529 .name = DRIVER_NAME,
2530 .id_table = qla4xxx_pci_tbl,
2531 .probe = qla4xxx_probe_adapter,
2532 .remove = qla4xxx_remove_adapter,
2533 .err_handler = &qla4xxx_err_handler,
2534 };
2535
2536 static int __init qla4xxx_module_init(void)
2537 {
2538 int ret;
2539
2540 /* Allocate cache for SRBs. */
2541 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
2542 SLAB_HWCACHE_ALIGN, NULL);
2543 if (srb_cachep == NULL) {
2544 printk(KERN_ERR
2545 "%s: Unable to allocate SRB cache..."
2546 "Failing load!\n", DRIVER_NAME);
2547 ret = -ENOMEM;
2548 goto no_srp_cache;
2549 }
2550
2551 /* Derive version string. */
2552 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
2553 if (ql4xextended_error_logging)
2554 strcat(qla4xxx_version_str, "-debug");
2555
2556 qla4xxx_scsi_transport =
2557 iscsi_register_transport(&qla4xxx_iscsi_transport);
2558 if (!qla4xxx_scsi_transport){
2559 ret = -ENODEV;
2560 goto release_srb_cache;
2561 }
2562
2563 ret = pci_register_driver(&qla4xxx_pci_driver);
2564 if (ret)
2565 goto unregister_transport;
2566
2567 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
2568 return 0;
2569
2570 unregister_transport:
2571 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2572 release_srb_cache:
2573 kmem_cache_destroy(srb_cachep);
2574 no_srp_cache:
2575 return ret;
2576 }
2577
2578 static void __exit qla4xxx_module_exit(void)
2579 {
2580 pci_unregister_driver(&qla4xxx_pci_driver);
2581 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
2582 kmem_cache_destroy(srb_cachep);
2583 }
2584
2585 module_init(qla4xxx_module_init);
2586 module_exit(qla4xxx_module_exit);
2587
2588 MODULE_AUTHOR("QLogic Corporation");
2589 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
2590 MODULE_LICENSE("GPL");
2591 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
kernel source for telekom puls (alcatel/mediatek)