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[SCSI] Initial Commit of qla4xxx
[net-next-2.6.git] / drivers / scsi / qla4xxx / ql4_os.c
CommitLineData
afaf5a2d
DS		 1/*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7#include <linux/moduleparam.h>
8
9#include <scsi/scsi_tcq.h>
10#include <scsi/scsicam.h>
11
12#include "ql4_def.h"
13
14/*
15 * Driver version
16 */
17char qla4xxx_version_str[40];
18
19/*
20 * SRB allocation cache
21 */
22static kmem_cache_t *srb_cachep;
23
24/*
25 * Module parameter information and variables
26 */
27int ql4xdiscoverywait = 60;
28module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
29MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
30int ql4xdontresethba = 0;
31module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
32MODULE_PARM_DESC(ql4xdontresethba,
33 "Dont reset the HBA when the driver gets 0x8002 AEN "
34 " default it will reset hba :0"
35 " set to 1 to avoid resetting HBA");
36
37int extended_error_logging = 0; /* 0 = off, 1 = log errors */
38module_param(extended_error_logging, int, S_IRUGO | S_IRUSR);
39MODULE_PARM_DESC(extended_error_logging,
40 "Option to enable extended error logging, "
41 "Default is 0 - no logging, 1 - debug logging");
42
43/*
44 * SCSI host template entry points
45 */
46
47void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
48
49/*
50 * iSCSI template entry points
51 */
52static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
53 uint32_t enable, struct sockaddr *dst_addr);
54static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
55 enum iscsi_param param, char *buf);
56static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
57 enum iscsi_param param, char *buf);
58static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
59static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
60static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
61
62/*
63 * SCSI host template entry points
64 */
65static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
66 void (*done) (struct scsi_cmnd *));
67static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
68static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
69static int qla4xxx_slave_alloc(struct scsi_device *device);
70static int qla4xxx_slave_configure(struct scsi_device *device);
71static void qla4xxx_slave_destroy(struct scsi_device *sdev);
72
73static struct scsi_host_template qla4xxx_driver_template = {
74 .module = THIS_MODULE,
75 .name = DRIVER_NAME,
76 .proc_name = DRIVER_NAME,
77 .queuecommand = qla4xxx_queuecommand,
78
79 .eh_device_reset_handler = qla4xxx_eh_device_reset,
80 .eh_host_reset_handler = qla4xxx_eh_host_reset,
81
82 .slave_configure = qla4xxx_slave_configure,
83 .slave_alloc = qla4xxx_slave_alloc,
84 .slave_destroy = qla4xxx_slave_destroy,
85
86 .this_id = -1,
87 .cmd_per_lun = 3,
88 .use_clustering = ENABLE_CLUSTERING,
89 .sg_tablesize = SG_ALL,
90
91 .max_sectors = 0xFFFF,
92};
93
94static struct iscsi_transport qla4xxx_iscsi_transport = {
95 .owner = THIS_MODULE,
96 .name = DRIVER_NAME,
97 .param_mask = ISCSI_CONN_PORT |
98 ISCSI_CONN_ADDRESS |
99 ISCSI_TARGET_NAME |
100 ISCSI_TPGT,
101 .sessiondata_size = sizeof(struct ddb_entry),
102 .host_template = &qla4xxx_driver_template,
103
104 .tgt_dscvr = qla4xxx_tgt_dscvr,
105 .get_conn_param = qla4xxx_conn_get_param,
106 .get_session_param = qla4xxx_sess_get_param,
107 .start_conn = qla4xxx_conn_start,
108 .stop_conn = qla4xxx_conn_stop,
109 .session_recovery_timedout = qla4xxx_recovery_timedout,
110};
111
112static struct scsi_transport_template *qla4xxx_scsi_transport;
113
114static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
115{
116 struct ddb_entry *ddb_entry = session->dd_data;
117 struct scsi_qla_host *ha = ddb_entry->ha;
118
119 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
120 "secs exhausted, marking device DEAD.\n", ha->host_no,
121 __func__, ddb_entry->fw_ddb_index,
122 ha->port_down_retry_count));
123
124 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
125
126 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
127 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
128 queue_work(ha->dpc_thread, &ha->dpc_work);
129}
130
131static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
132{
133 struct iscsi_cls_session *session;
134 struct ddb_entry *ddb_entry;
135
136 session = iscsi_dev_to_session(conn->dev.parent);
137 ddb_entry = session->dd_data;
138
139 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
140 ddb_entry->ha->host_no, __func__,
141 ddb_entry->fw_ddb_index));
142 iscsi_unblock_session(session);
143 return 0;
144}
145
146static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
147{
148 struct iscsi_cls_session *session;
149 struct ddb_entry *ddb_entry;
150
151 session = iscsi_dev_to_session(conn->dev.parent);
152 ddb_entry = session->dd_data;
153
154 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
155 ddb_entry->ha->host_no, __func__,
156 ddb_entry->fw_ddb_index));
157 if (flag == STOP_CONN_RECOVER)
158 iscsi_block_session(session);
159 else
160 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
161}
162
163static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
164 enum iscsi_param param, char *buf)
165{
166 struct ddb_entry *ddb_entry = sess->dd_data;
167 int len;
168
169 switch (param) {
170 case ISCSI_PARAM_TARGET_NAME:
171 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
172 ddb_entry->iscsi_name);
173 break;
174 case ISCSI_PARAM_TPGT:
175 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
176 break;
177 default:
178 return -ENOSYS;
179 }
180
181 return len;
182}
183
184static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
185 enum iscsi_param param, char *buf)
186{
187 struct iscsi_cls_session *session;
188 struct ddb_entry *ddb_entry;
189 int len;
190
191 session = iscsi_dev_to_session(conn->dev.parent);
192 ddb_entry = session->dd_data;
193
194 switch (param) {
195 case ISCSI_PARAM_CONN_PORT:
196 len = sprintf(buf, "%hu\n", ddb_entry->port);
197 break;
198 case ISCSI_PARAM_CONN_ADDRESS:
199 /* TODO: what are the ipv6 bits */
200 len = sprintf(buf, "%u.%u.%u.%u\n",
201 NIPQUAD(ddb_entry->ip_addr));
202 break;
203 default:
204 return -ENOSYS;
205 }
206
207 return len;
208}
209
210static int qla4xxx_tgt_dscvr(enum iscsi_tgt_dscvr type, uint32_t host_no,
211 uint32_t enable, struct sockaddr *dst_addr)
212{
213 struct scsi_qla_host *ha;
214 struct Scsi_Host *shost;
215 struct sockaddr_in *addr;
216 struct sockaddr_in6 *addr6;
217 int ret = 0;
218
219 shost = scsi_host_lookup(host_no);
220 if (IS_ERR(shost)) {
221 printk(KERN_ERR "Could not find host no %u\n", host_no);
222 return -ENODEV;
223 }
224
225 ha = (struct scsi_qla_host *) shost->hostdata;
226
227 switch (type) {
228 case ISCSI_TGT_DSCVR_SEND_TARGETS:
229 if (dst_addr->sa_family == AF_INET) {
230 addr = (struct sockaddr_in *)dst_addr;
231 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
232 addr->sin_port) != QLA_SUCCESS)
233 ret = -EIO;
234 } else if (dst_addr->sa_family == AF_INET6) {
235 /*
236 * TODO: fix qla4xxx_send_tgts
237 */
238 addr6 = (struct sockaddr_in6 *)dst_addr;
239 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
240 addr6->sin6_port) != QLA_SUCCESS)
241 ret = -EIO;
242 } else
243 ret = -ENOSYS;
244 break;
245 default:
246 ret = -ENOSYS;
247 }
248
249 scsi_host_put(shost);
250 return ret;
251}
252
253void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
254{
255 if (!ddb_entry->sess)
256 return;
257
258 if (ddb_entry->conn) {
259 iscsi_if_destroy_session_done(ddb_entry->conn);
260 iscsi_destroy_conn(ddb_entry->conn);
261 iscsi_remove_session(ddb_entry->sess);
262 }
263 iscsi_free_session(ddb_entry->sess);
264}
265
266int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
267{
268 int err;
269
270 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
271 if (err) {
272 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
273 return err;
274 }
275
276 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
277 if (!ddb_entry->conn) {
278 iscsi_remove_session(ddb_entry->sess);
279 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
280 return -ENOMEM;
281 }
282
283 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
284 iscsi_if_create_session_done(ddb_entry->conn);
285 return 0;
286}
287
288struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
289{
290 struct ddb_entry *ddb_entry;
291 struct iscsi_cls_session *sess;
292
293 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
294 if (!sess)
295 return NULL;
296
297 ddb_entry = sess->dd_data;
298 memset(ddb_entry, 0, sizeof(*ddb_entry));
299 ddb_entry->ha = ha;
300 ddb_entry->sess = sess;
301 return ddb_entry;
302}
303
304/*
305 * Timer routines
306 */
307
308static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
309 unsigned long interval)
310{
311 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
312 __func__, ha->host->host_no));
313 init_timer(&ha->timer);
314 ha->timer.expires = jiffies + interval * HZ;
315 ha->timer.data = (unsigned long)ha;
316 ha->timer.function = (void (*)(unsigned long))func;
317 add_timer(&ha->timer);
318 ha->timer_active = 1;
319}
320
321static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
322{
323 del_timer_sync(&ha->timer);
324 ha->timer_active = 0;
325}
326
327/***
328 * qla4xxx_mark_device_missing - mark a device as missing.
329 * @ha: Pointer to host adapter structure.
330 * @ddb_entry: Pointer to device database entry
331 *
332 * This routine marks a device missing and resets the relogin retry count.
333 **/
334void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
335 struct ddb_entry *ddb_entry)
336{
337 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
338 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
339 ha->host_no, ddb_entry->bus, ddb_entry->target,
340 ddb_entry->fw_ddb_index));
341 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
342}
343
344static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
345 struct ddb_entry *ddb_entry,
346 struct scsi_cmnd *cmd,
347 void (*done)(struct scsi_cmnd *))
348{
349 struct srb *srb;
350
351 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
352 if (!srb)
353 return srb;
354
355 atomic_set(&srb->ref_count, 1);
356 srb->ha = ha;
357 srb->ddb = ddb_entry;
358 srb->cmd = cmd;
359 srb->flags = 0;
360 cmd->SCp.ptr = (void *)srb;
361 cmd->scsi_done = done;
362
363 return srb;
364}
365
366static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
367{
368 struct scsi_cmnd *cmd = srb->cmd;
369
370 if (srb->flags & SRB_DMA_VALID) {
371 if (cmd->use_sg) {
372 pci_unmap_sg(ha->pdev, cmd->request_buffer,
373 cmd->use_sg, cmd->sc_data_direction);
374 } else if (cmd->request_bufflen) {
375 pci_unmap_single(ha->pdev, srb->dma_handle,
376 cmd->request_bufflen,
377 cmd->sc_data_direction);
378 }
379 srb->flags &= ~SRB_DMA_VALID;
380 }
381 cmd->SCp.ptr = NULL;
382}
383
384void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
385{
386 struct scsi_cmnd *cmd = srb->cmd;
387
388 qla4xxx_srb_free_dma(ha, srb);
389
390 mempool_free(srb, ha->srb_mempool);
391
392 cmd->scsi_done(cmd);
393}
394
395/**
396 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
397 * @cmd: Pointer to Linux's SCSI command structure
398 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
399 * that the command has been processed.
400 *
401 * Remarks:
402 * This routine is invoked by Linux to send a SCSI command to the driver.
403 * The mid-level driver tries to ensure that queuecommand never gets
404 * invoked concurrently with itself or the interrupt handler (although
405 * the interrupt handler may call this routine as part of request-
406 * completion handling). Unfortunely, it sometimes calls the scheduler
407 * in interrupt context which is a big NO! NO!.
408 **/
409static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
410 void (*done)(struct scsi_cmnd *))
411{
412 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
413 struct ddb_entry *ddb_entry = cmd->device->hostdata;
414 struct srb *srb;
415 int rval;
416
417 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
418 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
419 cmd->result = DID_NO_CONNECT << 16;
420 goto qc_fail_command;
421 }
422 goto qc_host_busy;
423 }
424
425 spin_unlock_irq(ha->host->host_lock);
426
427 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
428 if (!srb)
429 goto qc_host_busy_lock;
430
431 rval = qla4xxx_send_command_to_isp(ha, srb);
432 if (rval != QLA_SUCCESS)
433 goto qc_host_busy_free_sp;
434
435 spin_lock_irq(ha->host->host_lock);
436 return 0;
437
438qc_host_busy_free_sp:
439 qla4xxx_srb_free_dma(ha, srb);
440 mempool_free(srb, ha->srb_mempool);
441
442qc_host_busy_lock:
443 spin_lock_irq(ha->host->host_lock);
444
445qc_host_busy:
446 return SCSI_MLQUEUE_HOST_BUSY;
447
448qc_fail_command:
449 done(cmd);
450
451 return 0;
452}
453
454/**
455 * qla4xxx_mem_free - frees memory allocated to adapter
456 * @ha: Pointer to host adapter structure.
457 *
458 * Frees memory previously allocated by qla4xxx_mem_alloc
459 **/
460static void qla4xxx_mem_free(struct scsi_qla_host *ha)
461{
462 if (ha->queues)
463 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
464 ha->queues_dma);
465
466 ha->queues_len = 0;
467 ha->queues = NULL;
468 ha->queues_dma = 0;
469 ha->request_ring = NULL;
470 ha->request_dma = 0;
471 ha->response_ring = NULL;
472 ha->response_dma = 0;
473 ha->shadow_regs = NULL;
474 ha->shadow_regs_dma = 0;
475
476 /* Free srb pool. */
477 if (ha->srb_mempool)
478 mempool_destroy(ha->srb_mempool);
479
480 ha->srb_mempool = NULL;
481
482 /* release io space registers */
483 if (ha->reg)
484 iounmap(ha->reg);
485 pci_release_regions(ha->pdev);
486}
487
488/**
489 * qla4xxx_mem_alloc - allocates memory for use by adapter.
490 * @ha: Pointer to host adapter structure
491 *
492 * Allocates DMA memory for request and response queues. Also allocates memory
493 * for srbs.
494 **/
495static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
496{
497 unsigned long align;
498
499 /* Allocate contiguous block of DMA memory for queues. */
500 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
501 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
502 sizeof(struct shadow_regs) +
503 MEM_ALIGN_VALUE +
504 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
505 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
506 &ha->queues_dma, GFP_KERNEL);
507 if (ha->queues == NULL) {
508 dev_warn(&ha->pdev->dev,
509 "Memory Allocation failed - queues.\n");
510
511 goto mem_alloc_error_exit;
512 }
513 memset(ha->queues, 0, ha->queues_len);
514
515 /*
516 * As per RISC alignment requirements -- the bus-address must be a
517 * multiple of the request-ring size (in bytes).
518 */
519 align = 0;
520 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
521 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
522 (MEM_ALIGN_VALUE - 1));
523
524 /* Update request and response queue pointers. */
525 ha->request_dma = ha->queues_dma + align;
526 ha->request_ring = (struct queue_entry *) (ha->queues + align);
527 ha->response_dma = ha->queues_dma + align +
528 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
529 ha->response_ring = (struct queue_entry *) (ha->queues + align +
530 (REQUEST_QUEUE_DEPTH *
531 QUEUE_SIZE));
532 ha->shadow_regs_dma = ha->queues_dma + align +
533 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
534 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
535 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
536 (REQUEST_QUEUE_DEPTH *
537 QUEUE_SIZE) +
538 (RESPONSE_QUEUE_DEPTH *
539 QUEUE_SIZE));
540
541 /* Allocate memory for srb pool. */
542 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
543 mempool_free_slab, srb_cachep);
544 if (ha->srb_mempool == NULL) {
545 dev_warn(&ha->pdev->dev,
546 "Memory Allocation failed - SRB Pool.\n");
547
548 goto mem_alloc_error_exit;
549 }
550
551 return QLA_SUCCESS;
552
553mem_alloc_error_exit:
554 qla4xxx_mem_free(ha);
555 return QLA_ERROR;
556}
557
558/**
559 * qla4xxx_timer - checks every second for work to do.
560 * @ha: Pointer to host adapter structure.
561 **/
562static void qla4xxx_timer(struct scsi_qla_host *ha)
563{
564 struct ddb_entry *ddb_entry, *dtemp;
565 int start_dpc = 0;
566
567 /* Search for relogin's to time-out and port down retry. */
568 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
569 /* Count down time between sending relogins */
570 if (adapter_up(ha) &&
571 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
572 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
573 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
574 INVALID_ENTRY) {
575 if (atomic_read(&ddb_entry->retry_relogin_timer)
576 == 0) {
577 atomic_set(&ddb_entry->
578 retry_relogin_timer,
579 INVALID_ENTRY);
580 set_bit(DPC_RELOGIN_DEVICE,
581 &ha->dpc_flags);
582 set_bit(DF_RELOGIN, &ddb_entry->flags);
583 DEBUG2(printk("scsi%ld: %s: index [%d]"
584 " login device\n",
585 ha->host_no, __func__,
586 ddb_entry->fw_ddb_index));
587 } else
588 atomic_dec(&ddb_entry->
589 retry_relogin_timer);
590 }
591 }
592
593 /* Wait for relogin to timeout */
594 if (atomic_read(&ddb_entry->relogin_timer) &&
595 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
596 /*
597 * If the relogin times out and the device is
598 * still NOT ONLINE then try and relogin again.
599 */
600 if (atomic_read(&ddb_entry->state) !=
601 DDB_STATE_ONLINE &&
602 ddb_entry->fw_ddb_device_state ==
603 DDB_DS_SESSION_FAILED) {
604 /* Reset retry relogin timer */
605 atomic_inc(&ddb_entry->relogin_retry_count);
606 DEBUG2(printk("scsi%ld: index[%d] relogin"
607 " timed out-retrying"
608 " relogin (%d)\n",
609 ha->host_no,
610 ddb_entry->fw_ddb_index,
611 atomic_read(&ddb_entry->
612 relogin_retry_count))
613 );
614 start_dpc++;
615 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
616 "initate relogin after"
617 " %d seconds\n",
618 ha->host_no, ddb_entry->bus,
619 ddb_entry->target,
620 ddb_entry->fw_ddb_index,
621 ddb_entry->default_time2wait + 4)
622 );
623
624 atomic_set(&ddb_entry->retry_relogin_timer,
625 ddb_entry->default_time2wait + 4);
626 }
627 }
628 }
629
630 /* Check for heartbeat interval. */
631 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
632 ha->heartbeat_interval != 0) {
633 ha->seconds_since_last_heartbeat++;
634 if (ha->seconds_since_last_heartbeat >
635 ha->heartbeat_interval + 2)
636 set_bit(DPC_RESET_HA, &ha->dpc_flags);
637 }
638
639
640 /* Wakeup the dpc routine for this adapter, if needed. */
641 if ((start_dpc ||
642 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
643 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
644 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
645 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
646 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
647 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
648 test_bit(DPC_AEN, &ha->dpc_flags)) &&
649 ha->dpc_thread) {
650 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
651 " - dpc flags = 0x%lx\n",
652 ha->host_no, __func__, ha->dpc_flags));
653 queue_work(ha->dpc_thread, &ha->dpc_work);
654 }
655
656 /* Reschedule timer thread to call us back in one second */
657 mod_timer(&ha->timer, jiffies + HZ);
658
659 DEBUG2(ha->seconds_since_last_intr++);
660}
661
662/**
663 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
664 * @ha: Pointer to host adapter structure.
665 *
666 * This routine stalls the driver until all outstanding commands are returned.
667 * Caller must release the Hardware Lock prior to calling this routine.
668 **/
669static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
670{
671 uint32_t index = 0;
672 int stat = QLA_SUCCESS;
673 unsigned long flags;
674 struct scsi_cmnd *cmd;
675 int wait_cnt = WAIT_CMD_TOV; /*
676 * Initialized for 30 seconds as we
677 * expect all commands to retuned
678 * ASAP.
679 */
680
681 while (wait_cnt) {
682 spin_lock_irqsave(&ha->hardware_lock, flags);
683 /* Find a command that hasn't completed. */
684 for (index = 0; index < ha->host->can_queue; index++) {
685 cmd = scsi_host_find_tag(ha->host, index);
686 if (cmd != NULL)
687 break;
688 }
689 spin_unlock_irqrestore(&ha->hardware_lock, flags);
690
691 /* If No Commands are pending, wait is complete */
692 if (index == ha->host->can_queue) {
693 break;
694 }
695
696 /* If we timed out on waiting for commands to come back
697 * return ERROR.
698 */
699 wait_cnt--;
700 if (wait_cnt == 0)
701 stat = QLA_ERROR;
702 else {
703 msleep(1000);
704 }
705 } /* End of While (wait_cnt) */
706
707 return stat;
708}
709
710/**
711 * qla4010_soft_reset - performs soft reset.
712 * @ha: Pointer to host adapter structure.
713 **/
714static int qla4010_soft_reset(struct scsi_qla_host *ha)
715{
716 uint32_t max_wait_time;
717 unsigned long flags = 0;
718 int status = QLA_ERROR;
719 uint32_t ctrl_status;
720
721 spin_lock_irqsave(&ha->hardware_lock, flags);
722
723 /*
724 * If the SCSI Reset Interrupt bit is set, clear it.
725 * Otherwise, the Soft Reset won't work.
726 */
727 ctrl_status = readw(&ha->reg->ctrl_status);
728 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
729 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
730
731 /* Issue Soft Reset */
732 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
733 readl(&ha->reg->ctrl_status);
734
735 spin_unlock_irqrestore(&ha->hardware_lock, flags);
736
737 /* Wait until the Network Reset Intr bit is cleared */
738 max_wait_time = RESET_INTR_TOV;
739 do {
740 spin_lock_irqsave(&ha->hardware_lock, flags);
741 ctrl_status = readw(&ha->reg->ctrl_status);
742 spin_unlock_irqrestore(&ha->hardware_lock, flags);
743
744 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
745 break;
746
747 msleep(1000);
748 } while ((--max_wait_time));
749
750 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
751 DEBUG2(printk(KERN_WARNING
752 "scsi%ld: Network Reset Intr not cleared by "
753 "Network function, clearing it now!\n",
754 ha->host_no));
755 spin_lock_irqsave(&ha->hardware_lock, flags);
756 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
757 readl(&ha->reg->ctrl_status);
758 spin_unlock_irqrestore(&ha->hardware_lock, flags);
759 }
760
761 /* Wait until the firmware tells us the Soft Reset is done */
762 max_wait_time = SOFT_RESET_TOV;
763 do {
764 spin_lock_irqsave(&ha->hardware_lock, flags);
765 ctrl_status = readw(&ha->reg->ctrl_status);
766 spin_unlock_irqrestore(&ha->hardware_lock, flags);
767
768 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
769 status = QLA_SUCCESS;
770 break;
771 }
772
773 msleep(1000);
774 } while ((--max_wait_time));
775
776 /*
777 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
778 * after the soft reset has taken place.
779 */
780 spin_lock_irqsave(&ha->hardware_lock, flags);
781 ctrl_status = readw(&ha->reg->ctrl_status);
782 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
783 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
784 readl(&ha->reg->ctrl_status);
785 }
786 spin_unlock_irqrestore(&ha->hardware_lock, flags);
787
788 /* If soft reset fails then most probably the bios on other
789 * function is also enabled.
790 * Since the initialization is sequential the other fn
791 * wont be able to acknowledge the soft reset.
792 * Issue a force soft reset to workaround this scenario.
793 */
794 if (max_wait_time == 0) {
795 /* Issue Force Soft Reset */
796 spin_lock_irqsave(&ha->hardware_lock, flags);
797 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
798 readl(&ha->reg->ctrl_status);
799 spin_unlock_irqrestore(&ha->hardware_lock, flags);
800 /* Wait until the firmware tells us the Soft Reset is done */
801 max_wait_time = SOFT_RESET_TOV;
802 do {
803 spin_lock_irqsave(&ha->hardware_lock, flags);
804 ctrl_status = readw(&ha->reg->ctrl_status);
805 spin_unlock_irqrestore(&ha->hardware_lock, flags);
806
807 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
808 status = QLA_SUCCESS;
809 break;
810 }
811
812 msleep(1000);
813 } while ((--max_wait_time));
814 }
815
816 return status;
817}
818
819/**
820 * qla4xxx_topcat_reset - performs hard reset of TopCat Chip.
821 * @ha: Pointer to host adapter structure.
822 **/
823static int qla4xxx_topcat_reset(struct scsi_qla_host *ha)
824{
825 unsigned long flags;
826
827 ql4xxx_lock_nvram(ha);
828 spin_lock_irqsave(&ha->hardware_lock, flags);
829 writel(set_rmask(GPOR_TOPCAT_RESET), isp_gp_out(ha));
830 readl(isp_gp_out(ha));
831 mdelay(1);
832
833 writel(clr_rmask(GPOR_TOPCAT_RESET), isp_gp_out(ha));
834 readl(isp_gp_out(ha));
835 spin_unlock_irqrestore(&ha->hardware_lock, flags);
836 mdelay(2523);
837
838 ql4xxx_unlock_nvram(ha);
839 return QLA_SUCCESS;
840}
841
842/**
843 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
844 * @ha: Pointer to host adapter structure.
845 *
846 * This routine is called just prior to a HARD RESET to return all
847 * outstanding commands back to the Operating System.
848 * Caller should make sure that the following locks are released
849 * before this calling routine: Hardware lock, and io_request_lock.
850 **/
851static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
852{
853 struct srb *srb;
854 int i;
855 unsigned long flags;
856
857 spin_lock_irqsave(&ha->hardware_lock, flags);
858 for (i = 0; i < ha->host->can_queue; i++) {
859 srb = qla4xxx_del_from_active_array(ha, i);
860 if (srb != NULL) {
861 srb->cmd->result = DID_RESET << 16;
862 qla4xxx_srb_compl(ha, srb);
863 }
864 }
865 spin_unlock_irqrestore(&ha->hardware_lock, flags);
866
867}
868
869/**
870 * qla4xxx_hard_reset - performs HBA Hard Reset
871 * @ha: Pointer to host adapter structure.
872 **/
873static int qla4xxx_hard_reset(struct scsi_qla_host *ha)
874{
875 /* The QLA4010 really doesn't have an equivalent to a hard reset */
876 qla4xxx_flush_active_srbs(ha);
877 if (test_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags)) {
878 int status = QLA_ERROR;
879
880 if ((qla4010_soft_reset(ha) == QLA_SUCCESS) &&
881 (qla4xxx_topcat_reset(ha) == QLA_SUCCESS) &&
882 (qla4010_soft_reset(ha) == QLA_SUCCESS))
883 status = QLA_SUCCESS;
884 return status;
885 } else
886 return qla4010_soft_reset(ha);
887}
888
889/**
890 * qla4xxx_recover_adapter - recovers adapter after a fatal error
891 * @ha: Pointer to host adapter structure.
892 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
893 * after adapter recovery has completed.
894 * 0=preserve ddb list, 1=destroy and rebuild ddb list
895 **/
896static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
897 uint8_t renew_ddb_list)
898{
899 int status;
900
901 /* Stall incoming I/O until we are done */
902 clear_bit(AF_ONLINE, &ha->flags);
903 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
904 __func__));
905
906 /* Wait for outstanding commands to complete.
907 * Stalls the driver for max 30 secs
908 */
909 status = qla4xxx_cmd_wait(ha);
910
911 qla4xxx_disable_intrs(ha);
912
913 /* Flush any pending ddb changed AENs */
914 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
915
916 /* Reset the firmware. If successful, function
917 * returns with ISP interrupts enabled.
918 */
919 if (status == QLA_SUCCESS) {
920 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
921 ha->host_no, __func__));
922 status = qla4xxx_soft_reset(ha);
923 }
924 /* FIXMEkaren: Do we want to keep interrupts enabled and process
925 AENs after soft reset */
926
927 /* If firmware (SOFT) reset failed, or if all outstanding
928 * commands have not returned, then do a HARD reset.
929 */
930 if (status == QLA_ERROR) {
931 DEBUG2(printk("scsi%ld: %s - Performing hard reset..\n",
932 ha->host_no, __func__));
933 status = qla4xxx_hard_reset(ha);
934 }
935
936 /* Flush any pending ddb changed AENs */
937 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
938
939 /* Re-initialize firmware. If successful, function returns
940 * with ISP interrupts enabled */
941 if (status == QLA_SUCCESS) {
942 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
943 ha->host_no, __func__));
944
945 /* If successful, AF_ONLINE flag set in
946 * qla4xxx_initialize_adapter */
947 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
948 }
949
950 /* Failed adapter initialization?
951 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
952 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
953 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
954 /* Adapter initialization failed, see if we can retry
955 * resetting the ha */
956 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
957 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
958 DEBUG2(printk("scsi%ld: recover adapter - retrying "
959 "(%d) more times\n", ha->host_no,
960 ha->retry_reset_ha_cnt));
961 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
962 status = QLA_ERROR;
963 } else {
964 if (ha->retry_reset_ha_cnt > 0) {
965 /* Schedule another Reset HA--DPC will retry */
966 ha->retry_reset_ha_cnt--;
967 DEBUG2(printk("scsi%ld: recover adapter - "
968 "retry remaining %d\n",
969 ha->host_no,
970 ha->retry_reset_ha_cnt));
971 status = QLA_ERROR;
972 }
973
974 if (ha->retry_reset_ha_cnt == 0) {
975 /* Recover adapter retries have been exhausted.
976 * Adapter DEAD */
977 DEBUG2(printk("scsi%ld: recover adapter "
978 "failed - board disabled\n",
979 ha->host_no));
980 qla4xxx_flush_active_srbs(ha);
981 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
982 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
983 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
984 &ha->dpc_flags);
985 status = QLA_ERROR;
986 }
987 }
988 } else {
989 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
990 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
991 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
992 }
993
994 ha->adapter_error_count++;
995
996 if (status == QLA_SUCCESS)
997 qla4xxx_enable_intrs(ha);
998
999 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
1000 return status;
1001}
1002
1003/**
1004 * qla4xxx_do_dpc - dpc routine
1005 * @data: in our case pointer to adapter structure
1006 *
1007 * This routine is a task that is schedule by the interrupt handler
1008 * to perform the background processing for interrupts. We put it
1009 * on a task queue that is consumed whenever the scheduler runs; that's
1010 * so you can do anything (i.e. put the process to sleep etc). In fact,
1011 * the mid-level tries to sleep when it reaches the driver threshold
1012 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1013 **/
1014static void qla4xxx_do_dpc(void *data)
1015{
1016 struct scsi_qla_host *ha = (struct scsi_qla_host *) data;
1017 struct ddb_entry *ddb_entry, *dtemp;
1018
1019 DEBUG2(printk("scsi%ld: %s: DPC handler waking up.\n",
1020 ha->host_no, __func__));
1021
1022 DEBUG2(printk("scsi%ld: %s: ha->flags = 0x%08lx\n",
1023 ha->host_no, __func__, ha->flags));
1024 DEBUG2(printk("scsi%ld: %s: ha->dpc_flags = 0x%08lx\n",
1025 ha->host_no, __func__, ha->dpc_flags));
1026
1027 /* Initialization not yet finished. Don't do anything yet. */
1028 if (!test_bit(AF_INIT_DONE, &ha->flags))
1029 return;
1030
1031 if (adapter_up(ha) ||
1032 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1033 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1034 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1035 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags))
1036 /*
1037 * dg 09/23 Never initialize ddb list
1038 * once we up and running
1039 * qla4xxx_recover_adapter(ha,
1040 * REBUILD_DDB_LIST);
1041 */
1042 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1043
1044 if (test_bit(DPC_RESET_HA, &ha->dpc_flags))
1045 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1046
1047 if (test_and_clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1048 uint8_t wait_time = RESET_INTR_TOV;
1049 unsigned long flags = 0;
1050
1051 qla4xxx_flush_active_srbs(ha);
1052
1053 spin_lock_irqsave(&ha->hardware_lock, flags);
1054 while ((readw(&ha->reg->ctrl_status) &
1055 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1056 if (--wait_time == 0)
1057 break;
1058
1059 spin_unlock_irqrestore(&ha->hardware_lock,
1060 flags);
1061
1062 msleep(1000);
1063
1064 spin_lock_irqsave(&ha->hardware_lock, flags);
1065 }
1066 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1067
1068 if (wait_time == 0)
1069 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1070 "bit not cleared-- resetting\n",
1071 ha->host_no, __func__));
1072 }
1073 }
1074
1075 /* ---- process AEN? --- */
1076 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1077 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1078
1079 /* ---- Get DHCP IP Address? --- */
1080 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1081 qla4xxx_get_dhcp_ip_address(ha);
1082
1083 /* ---- relogin device? --- */
1084 if (adapter_up(ha) &&
1085 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1086 list_for_each_entry_safe(ddb_entry, dtemp,
1087 &ha->ddb_list, list) {
1088 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1089 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1090 qla4xxx_relogin_device(ha, ddb_entry);
1091
1092 /*
1093 * If mbx cmd times out there is no point
1094 * in continuing further.
1095 * With large no of targets this can hang
1096 * the system.
1097 */
1098 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1099 printk(KERN_WARNING "scsi%ld: %s: "
1100 "need to reset hba\n",
1101 ha->host_no, __func__);
1102 break;
1103 }
1104 }
1105 }
1106}
1107
1108/**
1109 * qla4xxx_free_adapter - release the adapter
1110 * @ha: pointer to adapter structure
1111 **/
1112static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1113{
1114
1115 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1116 /* Turn-off interrupts on the card. */
1117 qla4xxx_disable_intrs(ha);
1118 }
1119
1120 /* Kill the kernel thread for this host */
1121 if (ha->dpc_thread)
1122 destroy_workqueue(ha->dpc_thread);
1123
1124 /* Issue Soft Reset to put firmware in unknown state */
1125 qla4xxx_soft_reset(ha);
1126
1127 /* Remove timer thread, if present */
1128 if (ha->timer_active)
1129 qla4xxx_stop_timer(ha);
1130
1131 /* free extra memory */
1132 qla4xxx_mem_free(ha);
1133
1134 /* Detach interrupts */
1135 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1136 free_irq(ha->pdev->irq, ha);
1137
1138 pci_disable_device(ha->pdev);
1139
1140}
1141
1142/***
1143 * qla4xxx_iospace_config - maps registers
1144 * @ha: pointer to adapter structure
1145 *
1146 * This routines maps HBA's registers from the pci address space
1147 * into the kernel virtual address space for memory mapped i/o.
1148 **/
1149static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1150{
1151 unsigned long pio, pio_len, pio_flags;
1152 unsigned long mmio, mmio_len, mmio_flags;
1153
1154 pio = pci_resource_start(ha->pdev, 0);
1155 pio_len = pci_resource_len(ha->pdev, 0);
1156 pio_flags = pci_resource_flags(ha->pdev, 0);
1157 if (pio_flags & IORESOURCE_IO) {
1158 if (pio_len < MIN_IOBASE_LEN) {
1159 dev_warn(&ha->pdev->dev,
1160 "Invalid PCI I/O region size\n");
1161 pio = 0;
1162 }
1163 } else {
1164 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1165 pio = 0;
1166 }
1167
1168 /* Use MMIO operations for all accesses. */
1169 mmio = pci_resource_start(ha->pdev, 1);
1170 mmio_len = pci_resource_len(ha->pdev, 1);
1171 mmio_flags = pci_resource_flags(ha->pdev, 1);
1172
1173 if (!(mmio_flags & IORESOURCE_MEM)) {
1174 dev_err(&ha->pdev->dev,
1175 "region #0 not an MMIO resource, aborting\n");
1176
1177 goto iospace_error_exit;
1178 }
1179 if (mmio_len < MIN_IOBASE_LEN) {
1180 dev_err(&ha->pdev->dev,
1181 "Invalid PCI mem region size, aborting\n");
1182 goto iospace_error_exit;
1183 }
1184
1185 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1186 dev_warn(&ha->pdev->dev,
1187 "Failed to reserve PIO/MMIO regions\n");
1188
1189 goto iospace_error_exit;
1190 }
1191
1192 ha->pio_address = pio;
1193 ha->pio_length = pio_len;
1194 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1195 if (!ha->reg) {
1196 dev_err(&ha->pdev->dev,
1197 "cannot remap MMIO, aborting\n");
1198
1199 goto iospace_error_exit;
1200 }
1201
1202 return 0;
1203
1204iospace_error_exit:
1205 return -ENOMEM;
1206}
1207
1208/**
1209 * qla4xxx_probe_adapter - callback function to probe HBA
1210 * @pdev: pointer to pci_dev structure
1211 * @pci_device_id: pointer to pci_device entry
1212 *
1213 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1214 * It returns zero if successful. It also initializes all data necessary for
1215 * the driver.
1216 **/
1217static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1218 const struct pci_device_id *ent)
1219{
1220 int ret = -ENODEV, status;
1221 struct Scsi_Host *host;
1222 struct scsi_qla_host *ha;
1223 struct ddb_entry *ddb_entry, *ddbtemp;
1224 uint8_t init_retry_count = 0;
1225 char buf[34];
1226
1227 if (pci_enable_device(pdev))
1228 return -1;
1229
1230 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1231 if (host == NULL) {
1232 printk(KERN_WARNING
1233 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1234 goto probe_disable_device;
1235 }
1236
1237 /* Clear our data area */
1238 ha = (struct scsi_qla_host *) host->hostdata;
1239 memset(ha, 0, sizeof(*ha));
1240
1241 /* Save the information from PCI BIOS. */
1242 ha->pdev = pdev;
1243 ha->host = host;
1244 ha->host_no = host->host_no;
1245
1246 /* Configure PCI I/O space. */
1247 ret = qla4xxx_iospace_config(ha);
1248 if (ret)
1249 goto probe_failed;
1250
1251 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1252 pdev->device, pdev->irq, ha->reg);
1253
1254 qla4xxx_config_dma_addressing(ha);
1255
1256 /* Initialize lists and spinlocks. */
1257 INIT_LIST_HEAD(&ha->ddb_list);
1258 INIT_LIST_HEAD(&ha->free_srb_q);
1259
1260 mutex_init(&ha->mbox_sem);
1261 init_waitqueue_head(&ha->mailbox_wait_queue);
1262
1263 spin_lock_init(&ha->hardware_lock);
1264 spin_lock_init(&ha->list_lock);
1265
1266 /* Allocate dma buffers */
1267 if (qla4xxx_mem_alloc(ha)) {
1268 dev_warn(&ha->pdev->dev,
1269 "[ERROR] Failed to allocate memory for adapter\n");
1270
1271 ret = -ENOMEM;
1272 goto probe_failed;
1273 }
1274
1275 /*
1276 * Initialize the Host adapter request/response queues and
1277 * firmware
1278 * NOTE: interrupts enabled upon successful completion
1279 */
1280 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1281 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1282 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1283 "(%d)\n", __func__, init_retry_count));
1284 qla4xxx_soft_reset(ha);
1285 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1286 }
1287 if (status == QLA_ERROR) {
1288 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1289
1290 ret = -ENODEV;
1291 goto probe_failed;
1292 }
1293
1294 host->cmd_per_lun = 3;
1295 host->max_channel = 0;
1296 host->max_lun = MAX_LUNS - 1;
1297 host->max_id = MAX_TARGETS;
1298 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1299 host->can_queue = MAX_SRBS ;
1300 host->transportt = qla4xxx_scsi_transport;
1301
1302 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1303 if (ret) {
1304 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1305 goto probe_failed;
1306 }
1307
1308 /* Startup the kernel thread for this host adapter. */
1309 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1310 "qla4xxx_dpc\n", __func__));
1311 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1312 ha->dpc_thread = create_singlethread_workqueue(buf);
1313 if (!ha->dpc_thread) {
1314 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1315 ret = -ENODEV;
1316 goto probe_failed;
1317 }
1318 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc, ha);
1319
1320 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1321 SA_INTERRUPT|SA_SHIRQ, "qla4xxx", ha);
1322 if (ret) {
1323 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1324 " already in use.\n", pdev->irq);
1325 goto probe_failed;
1326 }
1327 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1328 host->irq = pdev->irq;
1329 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1330
1331 qla4xxx_enable_intrs(ha);
1332
1333 /* Start timer thread. */
1334 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1335
1336 set_bit(AF_INIT_DONE, &ha->flags);
1337
1338 pci_set_drvdata(pdev, ha);
1339
1340 ret = scsi_add_host(host, &pdev->dev);
1341 if (ret)
1342 goto probe_failed;
1343
1344 /* Update transport device information for all devices. */
1345 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1346 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1347 if (qla4xxx_add_sess(ddb_entry))
1348 goto remove_host;
1349 }
1350
1351 printk(KERN_INFO
1352 " QLogic iSCSI HBA Driver version: %s\n"
1353 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1354 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1355 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1356 ha->patch_number, ha->build_number);
1357
1358 return 0;
1359
1360remove_host:
1361 qla4xxx_free_ddb_list(ha);
1362 scsi_remove_host(host);
1363
1364probe_failed:
1365 qla4xxx_free_adapter(ha);
1366 scsi_host_put(ha->host);
1367
1368probe_disable_device:
1369 pci_disable_device(pdev);
1370
1371 return ret;
1372}
1373
1374/**
1375 * qla4xxx_remove_adapter - calback function to remove adapter.
1376 * @pci_dev: PCI device pointer
1377 **/
1378static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1379{
1380 struct scsi_qla_host *ha;
1381
1382 ha = pci_get_drvdata(pdev);
1383
1384 /* remove devs from iscsi_sessions to scsi_devices */
1385 qla4xxx_free_ddb_list(ha);
1386
1387 scsi_remove_host(ha->host);
1388
1389 qla4xxx_free_adapter(ha);
1390
1391 scsi_host_put(ha->host);
1392
1393 pci_set_drvdata(pdev, NULL);
1394}
1395
1396/**
1397 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1398 * @ha: HA context
1399 *
1400 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1401 * supported addressing method.
1402 */
1403void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1404{
1405 int retval;
1406
1407 /* Update our PCI device dma_mask for full 64 bit mask */
1408 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1409 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1410 dev_dbg(&ha->pdev->dev,
1411 "Failed to set 64 bit PCI consistent mask; "
1412 "using 32 bit.\n");
1413 retval = pci_set_consistent_dma_mask(ha->pdev,
1414 DMA_32BIT_MASK);
1415 }
1416 } else
1417 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1418}
1419
1420static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1421{
1422 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1423 struct ddb_entry *ddb = sess->dd_data;
1424
1425 sdev->hostdata = ddb;
1426 sdev->tagged_supported = 1;
1427 scsi_activate_tcq(sdev, sdev->host->can_queue);
1428 return 0;
1429}
1430
1431static int qla4xxx_slave_configure(struct scsi_device *sdev)
1432{
1433 sdev->tagged_supported = 1;
1434 return 0;
1435}
1436
1437static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1438{
1439 scsi_deactivate_tcq(sdev, 1);
1440}
1441
1442/**
1443 * qla4xxx_del_from_active_array - returns an active srb
1444 * @ha: Pointer to host adapter structure.
1445 * @index: index into to the active_array
1446 *
1447 * This routine removes and returns the srb at the specified index
1448 **/
1449struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1450{
1451 struct srb *srb = NULL;
1452 struct scsi_cmnd *cmd;
1453
1454 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1455 return srb;
1456
1457 if (!(srb = (struct srb *)cmd->host_scribble))
1458 return srb;
1459
1460 /* update counters */
1461 if (srb->flags & SRB_DMA_VALID) {
1462 ha->req_q_count += srb->iocb_cnt;
1463 ha->iocb_cnt -= srb->iocb_cnt;
1464 if (srb->cmd)
1465 srb->cmd->host_scribble = NULL;
1466 }
1467 return srb;
1468}
1469
1470/**
1471 * qla4xxx_soft_reset - performs a SOFT RESET of hba.
1472 * @ha: Pointer to host adapter structure.
1473 **/
1474int qla4xxx_soft_reset(struct scsi_qla_host *ha)
1475{
1476
1477 DEBUG2(printk(KERN_WARNING "scsi%ld: %s: chip reset!\n", ha->host_no,
1478 __func__));
1479 if (test_bit(AF_TOPCAT_CHIP_PRESENT, &ha->flags)) {
1480 int status = QLA_ERROR;
1481
1482 if ((qla4010_soft_reset(ha) == QLA_SUCCESS) &&
1483 (qla4xxx_topcat_reset(ha) == QLA_SUCCESS) &&
1484 (qla4010_soft_reset(ha) == QLA_SUCCESS) )
1485 status = QLA_SUCCESS;
1486 return status;
1487 } else
1488 return qla4010_soft_reset(ha);
1489}
1490
1491/**
1492 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1493 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1494 * @cmd: Scsi Command to wait on.
1495 *
1496 * This routine waits for the command to be returned by the Firmware
1497 * for some max time.
1498 **/
1499static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1500 struct scsi_cmnd *cmd)
1501{
1502 int done = 0;
1503 struct srb *rp;
1504 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1505
1506 do {
1507 /* Checking to see if its returned to OS */
1508 rp = (struct srb *) cmd->SCp.ptr;
1509 if (rp == NULL) {
1510 done++;
1511 break;
1512 }
1513
1514 msleep(2000);
1515 } while (max_wait_time--);
1516
1517 return done;
1518}
1519
1520/**
1521 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1522 * @ha: Pointer to host adapter structure
1523 **/
1524static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1525{
1526 unsigned long wait_online;
1527
1528 wait_online = jiffies + (30 * HZ);
1529 while (time_before(jiffies, wait_online)) {
1530
1531 if (adapter_up(ha))
1532 return QLA_SUCCESS;
1533 else if (ha->retry_reset_ha_cnt == 0)
1534 return QLA_ERROR;
1535
1536 msleep(2000);
1537 }
1538
1539 return QLA_ERROR;
1540}
1541
1542/**
1543 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1544 * @ha: pointer to to HBA
1545 * @t: target id
1546 * @l: lun id
1547 *
1548 * This function waits for all outstanding commands to a lun to complete. It
1549 * returns 0 if all pending commands are returned and 1 otherwise.
1550 **/
1551static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1552 int t, int l)
1553{
1554 int cnt;
1555 int status = 0;
1556 struct scsi_cmnd *cmd;
1557
1558 /*
1559 * Waiting for all commands for the designated target in the active
1560 * array
1561 */
1562 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1563 cmd = scsi_host_find_tag(ha->host, cnt);
1564 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1565 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1566 status++;
1567 break;
1568 }
1569 }
1570 }
1571 return status;
1572}
1573
1574/**
1575 * qla4xxx_eh_device_reset - callback for target reset.
1576 * @cmd: Pointer to Linux's SCSI command structure
1577 *
1578 * This routine is called by the Linux OS to reset all luns on the
1579 * specified target.
1580 **/
1581static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1582{
1583 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1584 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1585 struct srb *sp;
1586 int ret = FAILED, stat;
1587
1588 sp = (struct srb *) cmd->SCp.ptr;
1589 if (!sp || !ddb_entry)
1590 return ret;
1591
1592 dev_info(&ha->pdev->dev,
1593 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1594 cmd->device->channel, cmd->device->id, cmd->device->lun);
1595
1596 DEBUG2(printk(KERN_INFO
1597 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1598 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1599 cmd, jiffies, cmd->timeout_per_command / HZ,
1600 ha->dpc_flags, cmd->result, cmd->allowed));
1601
1602 /* FIXME: wait for hba to go online */
1603 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1604 if (stat != QLA_SUCCESS) {
1605 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1606 goto eh_dev_reset_done;
1607 }
1608
1609 /* Send marker. */
1610 ha->marker_needed = 1;
1611
1612 /*
1613 * If we are coming down the EH path, wait for all commands to complete
1614 * for the device.
1615 */
1616 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1617 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1618 cmd->device->id,
1619 cmd->device->lun)){
1620 dev_info(&ha->pdev->dev,
1621 "DEVICE RESET FAILED - waiting for "
1622 "commands.\n");
1623 goto eh_dev_reset_done;
1624 }
1625 }
1626
1627 dev_info(&ha->pdev->dev,
1628 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1629 ha->host_no, cmd->device->channel, cmd->device->id,
1630 cmd->device->lun);
1631
1632 ret = SUCCESS;
1633
1634eh_dev_reset_done:
1635
1636 return ret;
1637}
1638
1639/**
1640 * qla4xxx_eh_host_reset - kernel callback
1641 * @cmd: Pointer to Linux's SCSI command structure
1642 *
1643 * This routine is invoked by the Linux kernel to perform fatal error
1644 * recovery on the specified adapter.
1645 **/
1646static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1647{
1648 int return_status = FAILED;
1649 struct scsi_qla_host *ha;
1650
1651 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1652
1653 dev_info(&ha->pdev->dev,
1654 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1655 cmd->device->channel, cmd->device->id, cmd->device->lun);
1656
1657 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1658 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1659 "DEAD.\n", ha->host_no, cmd->device->channel,
1660 __func__));
1661
1662 return FAILED;
1663 }
1664
1665 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1666 return_status = SUCCESS;
1667 }
1668
1669 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1670 return_status == FAILED ? "FAILED" : "SUCCEDED");
1671
1672 return return_status;
1673}
1674
1675
1676static struct pci_device_id qla4xxx_pci_tbl[] = {
1677 {
1678 .vendor = PCI_VENDOR_ID_QLOGIC,
1679 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1680 .subvendor = PCI_ANY_ID,
1681 .subdevice = PCI_ANY_ID,
1682 },
1683 {
1684 .vendor = PCI_VENDOR_ID_QLOGIC,
1685 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1686 .subvendor = PCI_ANY_ID,
1687 .subdevice = PCI_ANY_ID,
1688 },
1689 {0, 0},
1690};
1691MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1692
1693struct pci_driver qla4xxx_pci_driver = {
1694 .name = DRIVER_NAME,
1695 .id_table = qla4xxx_pci_tbl,
1696 .probe = qla4xxx_probe_adapter,
1697 .remove = qla4xxx_remove_adapter,
1698};
1699
1700static int __init qla4xxx_module_init(void)
1701{
1702 int ret;
1703
1704 /* Allocate cache for SRBs. */
1705 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1706 SLAB_HWCACHE_ALIGN, NULL, NULL);
1707 if (srb_cachep == NULL) {
1708 printk(KERN_ERR
1709 "%s: Unable to allocate SRB cache..."
1710 "Failing load!\n", DRIVER_NAME);
1711 ret = -ENOMEM;
1712 goto no_srp_cache;
1713 }
1714
1715 /* Derive version string. */
1716 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1717 if (extended_error_logging)
1718 strcat(qla4xxx_version_str, "-debug");
1719
1720 qla4xxx_scsi_transport =
1721 iscsi_register_transport(&qla4xxx_iscsi_transport);
1722 if (!qla4xxx_scsi_transport){
1723 ret = -ENODEV;
1724 goto release_srb_cache;
1725 }
1726
1727 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1728 ret = pci_register_driver(&qla4xxx_pci_driver);
1729 if (ret)
1730 goto unregister_transport;
1731
1732 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1733 return 0;
1734unregister_transport:
1735 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1736release_srb_cache:
1737 kmem_cache_destroy(srb_cachep);
1738no_srp_cache:
1739 return ret;
1740}
1741
1742static void __exit qla4xxx_module_exit(void)
1743{
1744 pci_unregister_driver(&qla4xxx_pci_driver);
1745 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1746 kmem_cache_destroy(srb_cachep);
1747}
1748
1749module_init(qla4xxx_module_init);
1750module_exit(qla4xxx_module_exit);
1751
1752MODULE_AUTHOR("QLogic Corporation");
1753MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1754MODULE_LICENSE("GPL");
1755MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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