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Committer: Michael Beasley <mike@snafu.setup>
[mikesnafu-overlay.git] / drivers / scsi / qla4xxx / ql4_os.c
blob8b92f348f02c73ad8e139be5ede91843d31afc47
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 #include "ql4_version.h"
14 #include "ql4_glbl.h"
15 #include "ql4_dbg.h"
16 #include "ql4_inline.h"
17
18 /*
19 * Driver version
20 */
21 static char qla4xxx_version_str[40];
22
23 /*
24 * SRB allocation cache
25 */
26 static struct kmem_cache *srb_cachep;
27
28 /*
29 * Module parameter information and variables
30 */
31 int ql4xdiscoverywait = 60;
32 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
33 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
34 int ql4xdontresethba = 0;
35 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
36 MODULE_PARM_DESC(ql4xdontresethba,
37 "Dont reset the HBA when the driver gets 0x8002 AEN "
38 " default it will reset hba :0"
39 " set to 1 to avoid resetting HBA");
40
41 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
42 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
43 MODULE_PARM_DESC(ql4xextended_error_logging,
44 "Option to enable extended error logging, "
45 "Default is 0 - no logging, 1 - debug logging");
46
47 int ql4_mod_unload = 0;
48
49 /*
50 * SCSI host template entry points
51 */
52 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
53
54 /*
55 * iSCSI template entry points
56 */
57 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
58 enum iscsi_tgt_dscvr type, uint32_t enable,
59 struct sockaddr *dst_addr);
60 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
61 enum iscsi_param param, char *buf);
62 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
63 enum iscsi_param param, char *buf);
64 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
65 enum iscsi_host_param param, char *buf);
66 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
67
68 /*
69 * SCSI host template entry points
70 */
71 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
72 void (*done) (struct scsi_cmnd *));
73 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
74 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
75 static int qla4xxx_slave_alloc(struct scsi_device *device);
76 static int qla4xxx_slave_configure(struct scsi_device *device);
77 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
78 static void qla4xxx_scan_start(struct Scsi_Host *shost);
79
80 static struct scsi_host_template qla4xxx_driver_template = {
81 .module = THIS_MODULE,
82 .name = DRIVER_NAME,
83 .proc_name = DRIVER_NAME,
84 .queuecommand = qla4xxx_queuecommand,
85
86 .eh_device_reset_handler = qla4xxx_eh_device_reset,
87 .eh_host_reset_handler = qla4xxx_eh_host_reset,
88
89 .slave_configure = qla4xxx_slave_configure,
90 .slave_alloc = qla4xxx_slave_alloc,
91 .slave_destroy = qla4xxx_slave_destroy,
92
93 .scan_finished = iscsi_scan_finished,
94 .scan_start = qla4xxx_scan_start,
95
96 .this_id = -1,
97 .cmd_per_lun = 3,
98 .use_clustering = ENABLE_CLUSTERING,
99 .sg_tablesize = SG_ALL,
100
101 .max_sectors = 0xFFFF,
102 };
103
104 static struct iscsi_transport qla4xxx_iscsi_transport = {
105 .owner = THIS_MODULE,
106 .name = DRIVER_NAME,
107 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
108 CAP_DATA_PATH_OFFLOAD,
109 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
110 ISCSI_TARGET_NAME | ISCSI_TPGT,
111 .host_param_mask = ISCSI_HOST_HWADDRESS |
112 ISCSI_HOST_IPADDRESS |
113 ISCSI_HOST_INITIATOR_NAME,
114 .sessiondata_size = sizeof(struct ddb_entry),
115 .host_template = &qla4xxx_driver_template,
116
117 .tgt_dscvr = qla4xxx_tgt_dscvr,
118 .get_conn_param = qla4xxx_conn_get_param,
119 .get_session_param = qla4xxx_sess_get_param,
120 .get_host_param = qla4xxx_host_get_param,
121 .session_recovery_timedout = qla4xxx_recovery_timedout,
122 };
123
124 static struct scsi_transport_template *qla4xxx_scsi_transport;
125
126 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
127 {
128 struct ddb_entry *ddb_entry = session->dd_data;
129 struct scsi_qla_host *ha = ddb_entry->ha;
130
131 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
132 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
133
134 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count "
135 "of (%d) secs exhausted, marking device DEAD.\n",
136 ha->host_no, __func__, ddb_entry->fw_ddb_index,
137 ha->port_down_retry_count));
138
139 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc "
140 "flags = 0x%lx\n",
141 ha->host_no, __func__, ha->dpc_flags));
142 queue_work(ha->dpc_thread, &ha->dpc_work);
143 }
144 }
145
146 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
147 enum iscsi_host_param param, char *buf)
148 {
149 struct scsi_qla_host *ha = to_qla_host(shost);
150 int len;
151
152 switch (param) {
153 case ISCSI_HOST_PARAM_HWADDRESS:
154 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
155 break;
156 case ISCSI_HOST_PARAM_IPADDRESS:
157 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
158 ha->ip_address[1], ha->ip_address[2],
159 ha->ip_address[3]);
160 break;
161 case ISCSI_HOST_PARAM_INITIATOR_NAME:
162 len = sprintf(buf, "%s\n", ha->name_string);
163 break;
164 default:
165 return -ENOSYS;
166 }
167
168 return len;
169 }
170
171 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
172 enum iscsi_param param, char *buf)
173 {
174 struct ddb_entry *ddb_entry = sess->dd_data;
175 int len;
176
177 switch (param) {
178 case ISCSI_PARAM_TARGET_NAME:
179 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
180 ddb_entry->iscsi_name);
181 break;
182 case ISCSI_PARAM_TPGT:
183 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
184 break;
185 default:
186 return -ENOSYS;
187 }
188
189 return len;
190 }
191
192 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
193 enum iscsi_param param, char *buf)
194 {
195 struct iscsi_cls_session *session;
196 struct ddb_entry *ddb_entry;
197 int len;
198
199 session = iscsi_dev_to_session(conn->dev.parent);
200 ddb_entry = session->dd_data;
201
202 switch (param) {
203 case ISCSI_PARAM_CONN_PORT:
204 len = sprintf(buf, "%hu\n", ddb_entry->port);
205 break;
206 case ISCSI_PARAM_CONN_ADDRESS:
207 /* TODO: what are the ipv6 bits */
208 len = sprintf(buf, "%u.%u.%u.%u\n",
209 NIPQUAD(ddb_entry->ip_addr));
210 break;
211 default:
212 return -ENOSYS;
213 }
214
215 return len;
216 }
217
218 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
219 enum iscsi_tgt_dscvr type, uint32_t enable,
220 struct sockaddr *dst_addr)
221 {
222 struct scsi_qla_host *ha;
223 struct sockaddr_in *addr;
224 struct sockaddr_in6 *addr6;
225 int ret = 0;
226
227 ha = (struct scsi_qla_host *) shost->hostdata;
228
229 switch (type) {
230 case ISCSI_TGT_DSCVR_SEND_TARGETS:
231 if (dst_addr->sa_family == AF_INET) {
232 addr = (struct sockaddr_in *)dst_addr;
233 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
234 addr->sin_port) != QLA_SUCCESS)
235 ret = -EIO;
236 } else if (dst_addr->sa_family == AF_INET6) {
237 /*
238 * TODO: fix qla4xxx_send_tgts
239 */
240 addr6 = (struct sockaddr_in6 *)dst_addr;
241 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
242 addr6->sin6_port) != QLA_SUCCESS)
243 ret = -EIO;
244 } else
245 ret = -ENOSYS;
246 break;
247 default:
248 ret = -ENOSYS;
249 }
250 return ret;
251 }
252
253 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
254 {
255 if (!ddb_entry->sess)
256 return;
257
258 if (ddb_entry->conn) {
259 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
260 iscsi_remove_session(ddb_entry->sess);
261 }
262 iscsi_free_session(ddb_entry->sess);
263 }
264
265 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
266 {
267 int err;
268
269 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
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 /* finally ready to go */
284 iscsi_unblock_session(ddb_entry->sess);
285 return 0;
286 }
287
288 struct 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 static void qla4xxx_scan_start(struct Scsi_Host *shost)
305 {
306 struct scsi_qla_host *ha = shost_priv(shost);
307 struct ddb_entry *ddb_entry, *ddbtemp;
308
309 /* finish setup of sessions that were already setup in firmware */
310 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
311 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
312 qla4xxx_add_sess(ddb_entry);
313 }
314 }
315
316 /*
317 * Timer routines
318 */
319
320 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
321 unsigned long interval)
322 {
323 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
324 __func__, ha->host->host_no));
325 init_timer(&ha->timer);
326 ha->timer.expires = jiffies + interval * HZ;
327 ha->timer.data = (unsigned long)ha;
328 ha->timer.function = (void (*)(unsigned long))func;
329 add_timer(&ha->timer);
330 ha->timer_active = 1;
331 }
332
333 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
334 {
335 del_timer_sync(&ha->timer);
336 ha->timer_active = 0;
337 }
338
339 /***
340 * qla4xxx_mark_device_missing - mark a device as missing.
341 * @ha: Pointer to host adapter structure.
342 * @ddb_entry: Pointer to device database entry
343 *
344 * This routine marks a device missing and resets the relogin retry count.
345 **/
346 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
347 struct ddb_entry *ddb_entry)
348 {
349 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
350 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
351 ha->host_no, ddb_entry->bus, ddb_entry->target,
352 ddb_entry->fw_ddb_index));
353 iscsi_block_session(ddb_entry->sess);
354 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
355 }
356
357 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
358 struct ddb_entry *ddb_entry,
359 struct scsi_cmnd *cmd,
360 void (*done)(struct scsi_cmnd *))
361 {
362 struct srb *srb;
363
364 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
365 if (!srb)
366 return srb;
367
368 atomic_set(&srb->ref_count, 1);
369 srb->ha = ha;
370 srb->ddb = ddb_entry;
371 srb->cmd = cmd;
372 srb->flags = 0;
373 cmd->SCp.ptr = (void *)srb;
374 cmd->scsi_done = done;
375
376 return srb;
377 }
378
379 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
380 {
381 struct scsi_cmnd *cmd = srb->cmd;
382
383 if (srb->flags & SRB_DMA_VALID) {
384 scsi_dma_unmap(cmd);
385 srb->flags &= ~SRB_DMA_VALID;
386 }
387 cmd->SCp.ptr = NULL;
388 }
389
390 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
391 {
392 struct scsi_cmnd *cmd = srb->cmd;
393
394 qla4xxx_srb_free_dma(ha, srb);
395
396 mempool_free(srb, ha->srb_mempool);
397
398 cmd->scsi_done(cmd);
399 }
400
401 /**
402 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
403 * @cmd: Pointer to Linux's SCSI command structure
404 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
405 * that the command has been processed.
406 *
407 * Remarks:
408 * This routine is invoked by Linux to send a SCSI command to the driver.
409 * The mid-level driver tries to ensure that queuecommand never gets
410 * invoked concurrently with itself or the interrupt handler (although
411 * the interrupt handler may call this routine as part of request-
412 * completion handling). Unfortunely, it sometimes calls the scheduler
413 * in interrupt context which is a big NO! NO!.
414 **/
415 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
416 void (*done)(struct scsi_cmnd *))
417 {
418 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
419 struct ddb_entry *ddb_entry = cmd->device->hostdata;
420 struct iscsi_cls_session *sess = ddb_entry->sess;
421 struct srb *srb;
422 int rval;
423
424 if (!sess) {
425 cmd->result = DID_IMM_RETRY << 16;
426 goto qc_fail_command;
427 }
428
429 rval = iscsi_session_chkready(sess);
430 if (rval) {
431 cmd->result = rval;
432 goto qc_fail_command;
433 }
434
435 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
436 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
437 cmd->result = DID_NO_CONNECT << 16;
438 goto qc_fail_command;
439 }
440 goto qc_host_busy;
441 }
442
443 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
444 goto qc_host_busy;
445
446 spin_unlock_irq(ha->host->host_lock);
447
448 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
449 if (!srb)
450 goto qc_host_busy_lock;
451
452 rval = qla4xxx_send_command_to_isp(ha, srb);
453 if (rval != QLA_SUCCESS)
454 goto qc_host_busy_free_sp;
455
456 spin_lock_irq(ha->host->host_lock);
457 return 0;
458
459 qc_host_busy_free_sp:
460 qla4xxx_srb_free_dma(ha, srb);
461 mempool_free(srb, ha->srb_mempool);
462
463 qc_host_busy_lock:
464 spin_lock_irq(ha->host->host_lock);
465
466 qc_host_busy:
467 return SCSI_MLQUEUE_HOST_BUSY;
468
469 qc_fail_command:
470 done(cmd);
471
472 return 0;
473 }
474
475 /**
476 * qla4xxx_mem_free - frees memory allocated to adapter
477 * @ha: Pointer to host adapter structure.
478 *
479 * Frees memory previously allocated by qla4xxx_mem_alloc
480 **/
481 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
482 {
483 if (ha->queues)
484 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
485 ha->queues_dma);
486
487 ha->queues_len = 0;
488 ha->queues = NULL;
489 ha->queues_dma = 0;
490 ha->request_ring = NULL;
491 ha->request_dma = 0;
492 ha->response_ring = NULL;
493 ha->response_dma = 0;
494 ha->shadow_regs = NULL;
495 ha->shadow_regs_dma = 0;
496
497 /* Free srb pool. */
498 if (ha->srb_mempool)
499 mempool_destroy(ha->srb_mempool);
500
501 ha->srb_mempool = NULL;
502
503 /* release io space registers */
504 if (ha->reg)
505 iounmap(ha->reg);
506 pci_release_regions(ha->pdev);
507 }
508
509 /**
510 * qla4xxx_mem_alloc - allocates memory for use by adapter.
511 * @ha: Pointer to host adapter structure
512 *
513 * Allocates DMA memory for request and response queues. Also allocates memory
514 * for srbs.
515 **/
516 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
517 {
518 unsigned long align;
519
520 /* Allocate contiguous block of DMA memory for queues. */
521 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
522 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
523 sizeof(struct shadow_regs) +
524 MEM_ALIGN_VALUE +
525 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
526 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
527 &ha->queues_dma, GFP_KERNEL);
528 if (ha->queues == NULL) {
529 dev_warn(&ha->pdev->dev,
530 "Memory Allocation failed - queues.\n");
531
532 goto mem_alloc_error_exit;
533 }
534 memset(ha->queues, 0, ha->queues_len);
535
536 /*
537 * As per RISC alignment requirements -- the bus-address must be a
538 * multiple of the request-ring size (in bytes).
539 */
540 align = 0;
541 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
542 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
543 (MEM_ALIGN_VALUE - 1));
544
545 /* Update request and response queue pointers. */
546 ha->request_dma = ha->queues_dma + align;
547 ha->request_ring = (struct queue_entry *) (ha->queues + align);
548 ha->response_dma = ha->queues_dma + align +
549 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
550 ha->response_ring = (struct queue_entry *) (ha->queues + align +
551 (REQUEST_QUEUE_DEPTH *
552 QUEUE_SIZE));
553 ha->shadow_regs_dma = ha->queues_dma + align +
554 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
555 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
556 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
557 (REQUEST_QUEUE_DEPTH *
558 QUEUE_SIZE) +
559 (RESPONSE_QUEUE_DEPTH *
560 QUEUE_SIZE));
561
562 /* Allocate memory for srb pool. */
563 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
564 mempool_free_slab, srb_cachep);
565 if (ha->srb_mempool == NULL) {
566 dev_warn(&ha->pdev->dev,
567 "Memory Allocation failed - SRB Pool.\n");
568
569 goto mem_alloc_error_exit;
570 }
571
572 return QLA_SUCCESS;
573
574 mem_alloc_error_exit:
575 qla4xxx_mem_free(ha);
576 return QLA_ERROR;
577 }
578
579 /**
580 * qla4xxx_timer - checks every second for work to do.
581 * @ha: Pointer to host adapter structure.
582 **/
583 static void qla4xxx_timer(struct scsi_qla_host *ha)
584 {
585 struct ddb_entry *ddb_entry, *dtemp;
586 int start_dpc = 0;
587
588 /* Search for relogin's to time-out and port down retry. */
589 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
590 /* Count down time between sending relogins */
591 if (adapter_up(ha) &&
592 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
593 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
594 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
595 INVALID_ENTRY) {
596 if (atomic_read(&ddb_entry->retry_relogin_timer)
597 == 0) {
598 atomic_set(&ddb_entry->
599 retry_relogin_timer,
600 INVALID_ENTRY);
601 set_bit(DPC_RELOGIN_DEVICE,
602 &ha->dpc_flags);
603 set_bit(DF_RELOGIN, &ddb_entry->flags);
604 DEBUG2(printk("scsi%ld: %s: index [%d]"
605 " login device\n",
606 ha->host_no, __func__,
607 ddb_entry->fw_ddb_index));
608 } else
609 atomic_dec(&ddb_entry->
610 retry_relogin_timer);
611 }
612 }
613
614 /* Wait for relogin to timeout */
615 if (atomic_read(&ddb_entry->relogin_timer) &&
616 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
617 /*
618 * If the relogin times out and the device is
619 * still NOT ONLINE then try and relogin again.
620 */
621 if (atomic_read(&ddb_entry->state) !=
622 DDB_STATE_ONLINE &&
623 ddb_entry->fw_ddb_device_state ==
624 DDB_DS_SESSION_FAILED) {
625 /* Reset retry relogin timer */
626 atomic_inc(&ddb_entry->relogin_retry_count);
627 DEBUG2(printk("scsi%ld: index[%d] relogin"
628 " timed out-retrying"
629 " relogin (%d)\n",
630 ha->host_no,
631 ddb_entry->fw_ddb_index,
632 atomic_read(&ddb_entry->
633 relogin_retry_count))
634 );
635 start_dpc++;
636 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
637 "initate relogin after"
638 " %d seconds\n",
639 ha->host_no, ddb_entry->bus,
640 ddb_entry->target,
641 ddb_entry->fw_ddb_index,
642 ddb_entry->default_time2wait + 4)
643 );
644
645 atomic_set(&ddb_entry->retry_relogin_timer,
646 ddb_entry->default_time2wait + 4);
647 }
648 }
649 }
650
651 /* Check for heartbeat interval. */
652 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
653 ha->heartbeat_interval != 0) {
654 ha->seconds_since_last_heartbeat++;
655 if (ha->seconds_since_last_heartbeat >
656 ha->heartbeat_interval + 2)
657 set_bit(DPC_RESET_HA, &ha->dpc_flags);
658 }
659
660
661 /* Wakeup the dpc routine for this adapter, if needed. */
662 if ((start_dpc ||
663 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
664 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
665 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
666 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
667 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
668 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
669 test_bit(DPC_AEN, &ha->dpc_flags)) &&
670 ha->dpc_thread) {
671 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
672 " - dpc flags = 0x%lx\n",
673 ha->host_no, __func__, ha->dpc_flags));
674 queue_work(ha->dpc_thread, &ha->dpc_work);
675 }
676
677 /* Reschedule timer thread to call us back in one second */
678 mod_timer(&ha->timer, jiffies + HZ);
679
680 DEBUG2(ha->seconds_since_last_intr++);
681 }
682
683 /**
684 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
685 * @ha: Pointer to host adapter structure.
686 *
687 * This routine stalls the driver until all outstanding commands are returned.
688 * Caller must release the Hardware Lock prior to calling this routine.
689 **/
690 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
691 {
692 uint32_t index = 0;
693 int stat = QLA_SUCCESS;
694 unsigned long flags;
695 struct scsi_cmnd *cmd;
696 int wait_cnt = WAIT_CMD_TOV; /*
697 * Initialized for 30 seconds as we
698 * expect all commands to retuned
699 * ASAP.
700 */
701
702 while (wait_cnt) {
703 spin_lock_irqsave(&ha->hardware_lock, flags);
704 /* Find a command that hasn't completed. */
705 for (index = 0; index < ha->host->can_queue; index++) {
706 cmd = scsi_host_find_tag(ha->host, index);
707 if (cmd != NULL)
708 break;
709 }
710 spin_unlock_irqrestore(&ha->hardware_lock, flags);
711
712 /* If No Commands are pending, wait is complete */
713 if (index == ha->host->can_queue) {
714 break;
715 }
716
717 /* If we timed out on waiting for commands to come back
718 * return ERROR.
719 */
720 wait_cnt--;
721 if (wait_cnt == 0)
722 stat = QLA_ERROR;
723 else {
724 msleep(1000);
725 }
726 } /* End of While (wait_cnt) */
727
728 return stat;
729 }
730
731 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
732 {
733 uint32_t ctrl_status;
734 unsigned long flags = 0;
735
736 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
737
738 spin_lock_irqsave(&ha->hardware_lock, flags);
739
740 /*
741 * If the SCSI Reset Interrupt bit is set, clear it.
742 * Otherwise, the Soft Reset won't work.
743 */
744 ctrl_status = readw(&ha->reg->ctrl_status);
745 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
746 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
747
748 /* Issue Soft Reset */
749 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
750 readl(&ha->reg->ctrl_status);
751
752 spin_unlock_irqrestore(&ha->hardware_lock, flags);
753 }
754
755 /**
756 * qla4xxx_soft_reset - performs soft reset.
757 * @ha: Pointer to host adapter structure.
758 **/
759 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
760 {
761 uint32_t max_wait_time;
762 unsigned long flags = 0;
763 int status = QLA_ERROR;
764 uint32_t ctrl_status;
765
766 qla4xxx_hw_reset(ha);
767
768 /* Wait until the Network Reset Intr bit is cleared */
769 max_wait_time = RESET_INTR_TOV;
770 do {
771 spin_lock_irqsave(&ha->hardware_lock, flags);
772 ctrl_status = readw(&ha->reg->ctrl_status);
773 spin_unlock_irqrestore(&ha->hardware_lock, flags);
774
775 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
776 break;
777
778 msleep(1000);
779 } while ((--max_wait_time));
780
781 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
782 DEBUG2(printk(KERN_WARNING
783 "scsi%ld: Network Reset Intr not cleared by "
784 "Network function, clearing it now!\n",
785 ha->host_no));
786 spin_lock_irqsave(&ha->hardware_lock, flags);
787 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
788 readl(&ha->reg->ctrl_status);
789 spin_unlock_irqrestore(&ha->hardware_lock, flags);
790 }
791
792 /* Wait until the firmware tells us the Soft Reset is done */
793 max_wait_time = SOFT_RESET_TOV;
794 do {
795 spin_lock_irqsave(&ha->hardware_lock, flags);
796 ctrl_status = readw(&ha->reg->ctrl_status);
797 spin_unlock_irqrestore(&ha->hardware_lock, flags);
798
799 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
800 status = QLA_SUCCESS;
801 break;
802 }
803
804 msleep(1000);
805 } while ((--max_wait_time));
806
807 /*
808 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
809 * after the soft reset has taken place.
810 */
811 spin_lock_irqsave(&ha->hardware_lock, flags);
812 ctrl_status = readw(&ha->reg->ctrl_status);
813 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
814 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
815 readl(&ha->reg->ctrl_status);
816 }
817 spin_unlock_irqrestore(&ha->hardware_lock, flags);
818
819 /* If soft reset fails then most probably the bios on other
820 * function is also enabled.
821 * Since the initialization is sequential the other fn
822 * wont be able to acknowledge the soft reset.
823 * Issue a force soft reset to workaround this scenario.
824 */
825 if (max_wait_time == 0) {
826 /* Issue Force Soft Reset */
827 spin_lock_irqsave(&ha->hardware_lock, flags);
828 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
829 readl(&ha->reg->ctrl_status);
830 spin_unlock_irqrestore(&ha->hardware_lock, flags);
831 /* Wait until the firmware tells us the Soft Reset is done */
832 max_wait_time = SOFT_RESET_TOV;
833 do {
834 spin_lock_irqsave(&ha->hardware_lock, flags);
835 ctrl_status = readw(&ha->reg->ctrl_status);
836 spin_unlock_irqrestore(&ha->hardware_lock, flags);
837
838 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
839 status = QLA_SUCCESS;
840 break;
841 }
842
843 msleep(1000);
844 } while ((--max_wait_time));
845 }
846
847 return status;
848 }
849
850 /**
851 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
852 * @ha: Pointer to host adapter structure.
853 *
854 * This routine is called just prior to a HARD RESET to return all
855 * outstanding commands back to the Operating System.
856 * Caller should make sure that the following locks are released
857 * before this calling routine: Hardware lock, and io_request_lock.
858 **/
859 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
860 {
861 struct srb *srb;
862 int i;
863 unsigned long flags;
864
865 spin_lock_irqsave(&ha->hardware_lock, flags);
866 for (i = 0; i < ha->host->can_queue; i++) {
867 srb = qla4xxx_del_from_active_array(ha, i);
868 if (srb != NULL) {
869 srb->cmd->result = DID_RESET << 16;
870 qla4xxx_srb_compl(ha, srb);
871 }
872 }
873 spin_unlock_irqrestore(&ha->hardware_lock, flags);
874
875 }
876
877 /**
878 * qla4xxx_recover_adapter - recovers adapter after a fatal error
879 * @ha: Pointer to host adapter structure.
880 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
881 *
882 * renew_ddb_list value can be 0=preserve ddb list, 1=destroy and rebuild
883 * ddb list.
884 **/
885 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
886 uint8_t renew_ddb_list)
887 {
888 int status;
889
890 /* Stall incoming I/O until we are done */
891 clear_bit(AF_ONLINE, &ha->flags);
892
893 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
894 __func__));
895
896 /* Wait for outstanding commands to complete.
897 * Stalls the driver for max 30 secs
898 */
899 status = qla4xxx_cmd_wait(ha);
900
901 qla4xxx_disable_intrs(ha);
902
903 /* Flush any pending ddb changed AENs */
904 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
905
906 /* Reset the firmware. If successful, function
907 * returns with ISP interrupts enabled.
908 */
909 if (status == QLA_SUCCESS) {
910 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
911 ha->host_no, __func__));
912 qla4xxx_flush_active_srbs(ha);
913 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
914 status = qla4xxx_soft_reset(ha);
915 else
916 status = QLA_ERROR;
917 }
918
919 /* Flush any pending ddb changed AENs */
920 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
921
922 /* Re-initialize firmware. If successful, function returns
923 * with ISP interrupts enabled */
924 if (status == QLA_SUCCESS) {
925 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
926 ha->host_no, __func__));
927
928 /* If successful, AF_ONLINE flag set in
929 * qla4xxx_initialize_adapter */
930 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
931 }
932
933 /* Failed adapter initialization?
934 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
935 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
936 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
937 /* Adapter initialization failed, see if we can retry
938 * resetting the ha */
939 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
940 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
941 DEBUG2(printk("scsi%ld: recover adapter - retrying "
942 "(%d) more times\n", ha->host_no,
943 ha->retry_reset_ha_cnt));
944 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
945 status = QLA_ERROR;
946 } else {
947 if (ha->retry_reset_ha_cnt > 0) {
948 /* Schedule another Reset HA--DPC will retry */
949 ha->retry_reset_ha_cnt--;
950 DEBUG2(printk("scsi%ld: recover adapter - "
951 "retry remaining %d\n",
952 ha->host_no,
953 ha->retry_reset_ha_cnt));
954 status = QLA_ERROR;
955 }
956
957 if (ha->retry_reset_ha_cnt == 0) {
958 /* Recover adapter retries have been exhausted.
959 * Adapter DEAD */
960 DEBUG2(printk("scsi%ld: recover adapter "
961 "failed - board disabled\n",
962 ha->host_no));
963 qla4xxx_flush_active_srbs(ha);
964 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
965 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
966 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
967 &ha->dpc_flags);
968 status = QLA_ERROR;
969 }
970 }
971 } else {
972 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
973 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
974 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
975 }
976
977 ha->adapter_error_count++;
978
979 if (status == QLA_SUCCESS)
980 qla4xxx_enable_intrs(ha);
981
982 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
983 return status;
984 }
985
986 /**
987 * qla4xxx_do_dpc - dpc routine
988 * @data: in our case pointer to adapter structure
989 *
990 * This routine is a task that is schedule by the interrupt handler
991 * to perform the background processing for interrupts. We put it
992 * on a task queue that is consumed whenever the scheduler runs; that's
993 * so you can do anything (i.e. put the process to sleep etc). In fact,
994 * the mid-level tries to sleep when it reaches the driver threshold
995 * "host->can_queue". This can cause a panic if we were in our interrupt code.
996 **/
997 static void qla4xxx_do_dpc(struct work_struct *work)
998 {
999 struct scsi_qla_host *ha =
1000 container_of(work, struct scsi_qla_host, dpc_work);
1001 struct ddb_entry *ddb_entry, *dtemp;
1002 int status = QLA_ERROR;
1003
1004 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1005 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1006 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1007 readw(&ha->reg->ctrl_status)));
1008
1009 /* Initialization not yet finished. Don't do anything yet. */
1010 if (!test_bit(AF_INIT_DONE, &ha->flags))
1011 return;
1012
1013 if (adapter_up(ha) ||
1014 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1015 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1016 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
1017 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1018 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1019 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1020
1021 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1022 uint8_t wait_time = RESET_INTR_TOV;
1023
1024 while ((readw(&ha->reg->ctrl_status) &
1025 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1026 if (--wait_time == 0)
1027 break;
1028 msleep(1000);
1029 }
1030 if (wait_time == 0)
1031 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1032 "bit not cleared-- resetting\n",
1033 ha->host_no, __func__));
1034 qla4xxx_flush_active_srbs(ha);
1035 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1036 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1037 status = qla4xxx_initialize_adapter(ha,
1038 PRESERVE_DDB_LIST);
1039 }
1040 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1041 if (status == QLA_SUCCESS)
1042 qla4xxx_enable_intrs(ha);
1043 }
1044 }
1045
1046 /* ---- process AEN? --- */
1047 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1048 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1049
1050 /* ---- Get DHCP IP Address? --- */
1051 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1052 qla4xxx_get_dhcp_ip_address(ha);
1053
1054 /* ---- relogin device? --- */
1055 if (adapter_up(ha) &&
1056 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1057 list_for_each_entry_safe(ddb_entry, dtemp,
1058 &ha->ddb_list, list) {
1059 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1060 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1061 qla4xxx_relogin_device(ha, ddb_entry);
1062
1063 /*
1064 * If mbx cmd times out there is no point
1065 * in continuing further.
1066 * With large no of targets this can hang
1067 * the system.
1068 */
1069 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1070 printk(KERN_WARNING "scsi%ld: %s: "
1071 "need to reset hba\n",
1072 ha->host_no, __func__);
1073 break;
1074 }
1075 }
1076 }
1077 }
1078
1079 /**
1080 * qla4xxx_free_adapter - release the adapter
1081 * @ha: pointer to adapter structure
1082 **/
1083 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1084 {
1085
1086 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1087 /* Turn-off interrupts on the card. */
1088 qla4xxx_disable_intrs(ha);
1089 }
1090
1091 /* Kill the kernel thread for this host */
1092 if (ha->dpc_thread)
1093 destroy_workqueue(ha->dpc_thread);
1094
1095 /* Issue Soft Reset to put firmware in unknown state */
1096 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1097 qla4xxx_hw_reset(ha);
1098
1099 /* Remove timer thread, if present */
1100 if (ha->timer_active)
1101 qla4xxx_stop_timer(ha);
1102
1103 /* Detach interrupts */
1104 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1105 free_irq(ha->pdev->irq, ha);
1106
1107 /* free extra memory */
1108 qla4xxx_mem_free(ha);
1109
1110 pci_disable_device(ha->pdev);
1111
1112 }
1113
1114 /***
1115 * qla4xxx_iospace_config - maps registers
1116 * @ha: pointer to adapter structure
1117 *
1118 * This routines maps HBA's registers from the pci address space
1119 * into the kernel virtual address space for memory mapped i/o.
1120 **/
1121 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1122 {
1123 unsigned long pio, pio_len, pio_flags;
1124 unsigned long mmio, mmio_len, mmio_flags;
1125
1126 pio = pci_resource_start(ha->pdev, 0);
1127 pio_len = pci_resource_len(ha->pdev, 0);
1128 pio_flags = pci_resource_flags(ha->pdev, 0);
1129 if (pio_flags & IORESOURCE_IO) {
1130 if (pio_len < MIN_IOBASE_LEN) {
1131 dev_warn(&ha->pdev->dev,
1132 "Invalid PCI I/O region size\n");
1133 pio = 0;
1134 }
1135 } else {
1136 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1137 pio = 0;
1138 }
1139
1140 /* Use MMIO operations for all accesses. */
1141 mmio = pci_resource_start(ha->pdev, 1);
1142 mmio_len = pci_resource_len(ha->pdev, 1);
1143 mmio_flags = pci_resource_flags(ha->pdev, 1);
1144
1145 if (!(mmio_flags & IORESOURCE_MEM)) {
1146 dev_err(&ha->pdev->dev,
1147 "region #0 not an MMIO resource, aborting\n");
1148
1149 goto iospace_error_exit;
1150 }
1151 if (mmio_len < MIN_IOBASE_LEN) {
1152 dev_err(&ha->pdev->dev,
1153 "Invalid PCI mem region size, aborting\n");
1154 goto iospace_error_exit;
1155 }
1156
1157 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1158 dev_warn(&ha->pdev->dev,
1159 "Failed to reserve PIO/MMIO regions\n");
1160
1161 goto iospace_error_exit;
1162 }
1163
1164 ha->pio_address = pio;
1165 ha->pio_length = pio_len;
1166 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1167 if (!ha->reg) {
1168 dev_err(&ha->pdev->dev,
1169 "cannot remap MMIO, aborting\n");
1170
1171 goto iospace_error_exit;
1172 }
1173
1174 return 0;
1175
1176 iospace_error_exit:
1177 return -ENOMEM;
1178 }
1179
1180 /**
1181 * qla4xxx_probe_adapter - callback function to probe HBA
1182 * @pdev: pointer to pci_dev structure
1183 * @pci_device_id: pointer to pci_device entry
1184 *
1185 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1186 * It returns zero if successful. It also initializes all data necessary for
1187 * the driver.
1188 **/
1189 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1190 const struct pci_device_id *ent)
1191 {
1192 int ret = -ENODEV, status;
1193 struct Scsi_Host *host;
1194 struct scsi_qla_host *ha;
1195 uint8_t init_retry_count = 0;
1196 char buf[34];
1197
1198 if (pci_enable_device(pdev))
1199 return -1;
1200
1201 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1202 if (host == NULL) {
1203 printk(KERN_WARNING
1204 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1205 goto probe_disable_device;
1206 }
1207
1208 /* Clear our data area */
1209 ha = (struct scsi_qla_host *) host->hostdata;
1210 memset(ha, 0, sizeof(*ha));
1211
1212 /* Save the information from PCI BIOS. */
1213 ha->pdev = pdev;
1214 ha->host = host;
1215 ha->host_no = host->host_no;
1216
1217 /* Configure PCI I/O space. */
1218 ret = qla4xxx_iospace_config(ha);
1219 if (ret)
1220 goto probe_failed;
1221
1222 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1223 pdev->device, pdev->irq, ha->reg);
1224
1225 qla4xxx_config_dma_addressing(ha);
1226
1227 /* Initialize lists and spinlocks. */
1228 INIT_LIST_HEAD(&ha->ddb_list);
1229 INIT_LIST_HEAD(&ha->free_srb_q);
1230
1231 mutex_init(&ha->mbox_sem);
1232
1233 spin_lock_init(&ha->hardware_lock);
1234
1235 /* Allocate dma buffers */
1236 if (qla4xxx_mem_alloc(ha)) {
1237 dev_warn(&ha->pdev->dev,
1238 "[ERROR] Failed to allocate memory for adapter\n");
1239
1240 ret = -ENOMEM;
1241 goto probe_failed;
1242 }
1243
1244 /*
1245 * Initialize the Host adapter request/response queues and
1246 * firmware
1247 * NOTE: interrupts enabled upon successful completion
1248 */
1249 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1250 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1251 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1252 "(%d)\n", __func__, init_retry_count));
1253 qla4xxx_soft_reset(ha);
1254 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1255 }
1256 if (status == QLA_ERROR) {
1257 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1258
1259 ret = -ENODEV;
1260 goto probe_failed;
1261 }
1262
1263 host->cmd_per_lun = 3;
1264 host->max_channel = 0;
1265 host->max_lun = MAX_LUNS - 1;
1266 host->max_id = MAX_TARGETS;
1267 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1268 host->can_queue = MAX_SRBS ;
1269 host->transportt = qla4xxx_scsi_transport;
1270
1271 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1272 if (ret) {
1273 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1274 goto probe_failed;
1275 }
1276
1277 /* Startup the kernel thread for this host adapter. */
1278 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1279 "qla4xxx_dpc\n", __func__));
1280 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1281 ha->dpc_thread = create_singlethread_workqueue(buf);
1282 if (!ha->dpc_thread) {
1283 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1284 ret = -ENODEV;
1285 goto probe_failed;
1286 }
1287 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1288
1289 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1290 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1291 if (ret) {
1292 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1293 " already in use.\n", pdev->irq);
1294 goto probe_failed;
1295 }
1296 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1297 host->irq = pdev->irq;
1298 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1299
1300 qla4xxx_enable_intrs(ha);
1301
1302 /* Start timer thread. */
1303 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1304
1305 set_bit(AF_INIT_DONE, &ha->flags);
1306
1307 pci_set_drvdata(pdev, ha);
1308
1309 ret = scsi_add_host(host, &pdev->dev);
1310 if (ret)
1311 goto probe_failed;
1312
1313 printk(KERN_INFO
1314 " QLogic iSCSI HBA Driver version: %s\n"
1315 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1316 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1317 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1318 ha->patch_number, ha->build_number);
1319 scsi_scan_host(host);
1320 return 0;
1321
1322 probe_failed:
1323 qla4xxx_free_adapter(ha);
1324 scsi_host_put(ha->host);
1325
1326 probe_disable_device:
1327 pci_disable_device(pdev);
1328
1329 return ret;
1330 }
1331
1332 /**
1333 * qla4xxx_remove_adapter - calback function to remove adapter.
1334 * @pci_dev: PCI device pointer
1335 **/
1336 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1337 {
1338 struct scsi_qla_host *ha;
1339
1340 ha = pci_get_drvdata(pdev);
1341
1342 qla4xxx_disable_intrs(ha);
1343
1344 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1345 ssleep(1);
1346
1347 /* remove devs from iscsi_sessions to scsi_devices */
1348 qla4xxx_free_ddb_list(ha);
1349
1350 scsi_remove_host(ha->host);
1351
1352 qla4xxx_free_adapter(ha);
1353
1354 scsi_host_put(ha->host);
1355
1356 pci_set_drvdata(pdev, NULL);
1357 }
1358
1359 /**
1360 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1361 * @ha: HA context
1362 *
1363 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1364 * supported addressing method.
1365 */
1366 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1367 {
1368 int retval;
1369
1370 /* Update our PCI device dma_mask for full 64 bit mask */
1371 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1372 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1373 dev_dbg(&ha->pdev->dev,
1374 "Failed to set 64 bit PCI consistent mask; "
1375 "using 32 bit.\n");
1376 retval = pci_set_consistent_dma_mask(ha->pdev,
1377 DMA_32BIT_MASK);
1378 }
1379 } else
1380 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1381 }
1382
1383 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1384 {
1385 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1386 struct ddb_entry *ddb = sess->dd_data;
1387
1388 sdev->hostdata = ddb;
1389 sdev->tagged_supported = 1;
1390 scsi_activate_tcq(sdev, sdev->host->can_queue);
1391 return 0;
1392 }
1393
1394 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1395 {
1396 sdev->tagged_supported = 1;
1397 return 0;
1398 }
1399
1400 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1401 {
1402 scsi_deactivate_tcq(sdev, 1);
1403 }
1404
1405 /**
1406 * qla4xxx_del_from_active_array - returns an active srb
1407 * @ha: Pointer to host adapter structure.
1408 * @index: index into to the active_array
1409 *
1410 * This routine removes and returns the srb at the specified index
1411 **/
1412 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1413 {
1414 struct srb *srb = NULL;
1415 struct scsi_cmnd *cmd;
1416
1417 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1418 return srb;
1419
1420 if (!(srb = (struct srb *)cmd->host_scribble))
1421 return srb;
1422
1423 /* update counters */
1424 if (srb->flags & SRB_DMA_VALID) {
1425 ha->req_q_count += srb->iocb_cnt;
1426 ha->iocb_cnt -= srb->iocb_cnt;
1427 if (srb->cmd)
1428 srb->cmd->host_scribble = NULL;
1429 }
1430 return srb;
1431 }
1432
1433 /**
1434 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1435 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1436 * @cmd: Scsi Command to wait on.
1437 *
1438 * This routine waits for the command to be returned by the Firmware
1439 * for some max time.
1440 **/
1441 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1442 struct scsi_cmnd *cmd)
1443 {
1444 int done = 0;
1445 struct srb *rp;
1446 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1447
1448 do {
1449 /* Checking to see if its returned to OS */
1450 rp = (struct srb *) cmd->SCp.ptr;
1451 if (rp == NULL) {
1452 done++;
1453 break;
1454 }
1455
1456 msleep(2000);
1457 } while (max_wait_time--);
1458
1459 return done;
1460 }
1461
1462 /**
1463 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1464 * @ha: Pointer to host adapter structure
1465 **/
1466 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1467 {
1468 unsigned long wait_online;
1469
1470 wait_online = jiffies + (30 * HZ);
1471 while (time_before(jiffies, wait_online)) {
1472
1473 if (adapter_up(ha))
1474 return QLA_SUCCESS;
1475 else if (ha->retry_reset_ha_cnt == 0)
1476 return QLA_ERROR;
1477
1478 msleep(2000);
1479 }
1480
1481 return QLA_ERROR;
1482 }
1483
1484 /**
1485 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1486 * @ha: pointer to to HBA
1487 * @t: target id
1488 * @l: lun id
1489 *
1490 * This function waits for all outstanding commands to a lun to complete. It
1491 * returns 0 if all pending commands are returned and 1 otherwise.
1492 **/
1493 static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1494 int t, int l)
1495 {
1496 int cnt;
1497 int status = 0;
1498 struct scsi_cmnd *cmd;
1499
1500 /*
1501 * Waiting for all commands for the designated target in the active
1502 * array
1503 */
1504 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1505 cmd = scsi_host_find_tag(ha->host, cnt);
1506 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1507 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1508 status++;
1509 break;
1510 }
1511 }
1512 }
1513 return status;
1514 }
1515
1516 /**
1517 * qla4xxx_eh_device_reset - callback for target reset.
1518 * @cmd: Pointer to Linux's SCSI command structure
1519 *
1520 * This routine is called by the Linux OS to reset all luns on the
1521 * specified target.
1522 **/
1523 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1524 {
1525 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1526 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1527 struct srb *sp;
1528 int ret = FAILED, stat;
1529
1530 sp = (struct srb *) cmd->SCp.ptr;
1531 if (!sp || !ddb_entry)
1532 return ret;
1533
1534 dev_info(&ha->pdev->dev,
1535 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1536 cmd->device->channel, cmd->device->id, cmd->device->lun);
1537
1538 DEBUG2(printk(KERN_INFO
1539 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1540 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1541 cmd, jiffies, cmd->timeout_per_command / HZ,
1542 ha->dpc_flags, cmd->result, cmd->allowed));
1543
1544 /* FIXME: wait for hba to go online */
1545 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1546 if (stat != QLA_SUCCESS) {
1547 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1548 goto eh_dev_reset_done;
1549 }
1550
1551 /* Send marker. */
1552 ha->marker_needed = 1;
1553
1554 /*
1555 * If we are coming down the EH path, wait for all commands to complete
1556 * for the device.
1557 */
1558 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1559 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1560 cmd->device->id,
1561 cmd->device->lun)){
1562 dev_info(&ha->pdev->dev,
1563 "DEVICE RESET FAILED - waiting for "
1564 "commands.\n");
1565 goto eh_dev_reset_done;
1566 }
1567 }
1568
1569 dev_info(&ha->pdev->dev,
1570 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1571 ha->host_no, cmd->device->channel, cmd->device->id,
1572 cmd->device->lun);
1573
1574 ret = SUCCESS;
1575
1576 eh_dev_reset_done:
1577
1578 return ret;
1579 }
1580
1581 /**
1582 * qla4xxx_eh_host_reset - kernel callback
1583 * @cmd: Pointer to Linux's SCSI command structure
1584 *
1585 * This routine is invoked by the Linux kernel to perform fatal error
1586 * recovery on the specified adapter.
1587 **/
1588 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1589 {
1590 int return_status = FAILED;
1591 struct scsi_qla_host *ha;
1592
1593 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1594
1595 dev_info(&ha->pdev->dev,
1596 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1597 cmd->device->channel, cmd->device->id, cmd->device->lun);
1598
1599 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1600 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1601 "DEAD.\n", ha->host_no, cmd->device->channel,
1602 __func__));
1603
1604 return FAILED;
1605 }
1606
1607 /* make sure the dpc thread is stopped while we reset the hba */
1608 clear_bit(AF_ONLINE, &ha->flags);
1609 flush_workqueue(ha->dpc_thread);
1610
1611 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS)
1612 return_status = SUCCESS;
1613
1614 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1615 return_status == FAILED ? "FAILED" : "SUCCEDED");
1616
1617 return return_status;
1618 }
1619
1620
1621 static struct pci_device_id qla4xxx_pci_tbl[] = {
1622 {
1623 .vendor = PCI_VENDOR_ID_QLOGIC,
1624 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1625 .subvendor = PCI_ANY_ID,
1626 .subdevice = PCI_ANY_ID,
1627 },
1628 {
1629 .vendor = PCI_VENDOR_ID_QLOGIC,
1630 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1631 .subvendor = PCI_ANY_ID,
1632 .subdevice = PCI_ANY_ID,
1633 },
1634 {
1635 .vendor = PCI_VENDOR_ID_QLOGIC,
1636 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1637 .subvendor = PCI_ANY_ID,
1638 .subdevice = PCI_ANY_ID,
1639 },
1640 {0, 0},
1641 };
1642 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1643
1644 static struct pci_driver qla4xxx_pci_driver = {
1645 .name = DRIVER_NAME,
1646 .id_table = qla4xxx_pci_tbl,
1647 .probe = qla4xxx_probe_adapter,
1648 .remove = qla4xxx_remove_adapter,
1649 };
1650
1651 static int __init qla4xxx_module_init(void)
1652 {
1653 int ret;
1654
1655 /* Allocate cache for SRBs. */
1656 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1657 SLAB_HWCACHE_ALIGN, NULL);
1658 if (srb_cachep == NULL) {
1659 printk(KERN_ERR
1660 "%s: Unable to allocate SRB cache..."
1661 "Failing load!\n", DRIVER_NAME);
1662 ret = -ENOMEM;
1663 goto no_srp_cache;
1664 }
1665
1666 /* Derive version string. */
1667 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1668 if (ql4xextended_error_logging)
1669 strcat(qla4xxx_version_str, "-debug");
1670
1671 qla4xxx_scsi_transport =
1672 iscsi_register_transport(&qla4xxx_iscsi_transport);
1673 if (!qla4xxx_scsi_transport){
1674 ret = -ENODEV;
1675 goto release_srb_cache;
1676 }
1677
1678 ret = pci_register_driver(&qla4xxx_pci_driver);
1679 if (ret)
1680 goto unregister_transport;
1681
1682 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1683 return 0;
1684
1685 unregister_transport:
1686 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1687 release_srb_cache:
1688 kmem_cache_destroy(srb_cachep);
1689 no_srp_cache:
1690 return ret;
1691 }
1692
1693 static void __exit qla4xxx_module_exit(void)
1694 {
1695 ql4_mod_unload = 1;
1696 pci_unregister_driver(&qla4xxx_pci_driver);
1697 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1698 kmem_cache_destroy(srb_cachep);
1699 }
1700
1701 module_init(qla4xxx_module_init);
1702 module_exit(qla4xxx_module_exit);
1703
1704 MODULE_AUTHOR("QLogic Corporation");
1705 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1706 MODULE_LICENSE("GPL");
1707 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
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