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Staging: strip: delete the driver
[linux/fpc-iii.git] / drivers / scsi / qla4xxx / ql4_os.c
blob2ccad36bee9f0843a6807ede4cd44b5fd62dc48f
1 /*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7 #include <linux/moduleparam.h>
8 #include <linux/slab.h>
9
10 #include <scsi/scsi_tcq.h>
11 #include <scsi/scsicam.h>
12
13 #include "ql4_def.h"
14 #include "ql4_version.h"
15 #include "ql4_glbl.h"
16 #include "ql4_dbg.h"
17 #include "ql4_inline.h"
18
19 /*
20 * Driver version
21 */
22 static char qla4xxx_version_str[40];
23
24 /*
25 * SRB allocation cache
26 */
27 static struct kmem_cache *srb_cachep;
28
29 /*
30 * Module parameter information and variables
31 */
32 int ql4xdiscoverywait = 60;
33 module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
34 MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
35 int ql4xdontresethba = 0;
36 module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
37 MODULE_PARM_DESC(ql4xdontresethba,
38 "Dont reset the HBA when the driver gets 0x8002 AEN "
39 " default it will reset hba :0"
40 " set to 1 to avoid resetting HBA");
41
42 int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
43 module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
44 MODULE_PARM_DESC(ql4xextended_error_logging,
45 "Option to enable extended error logging, "
46 "Default is 0 - no logging, 1 - debug logging");
47
48 int ql4_mod_unload = 0;
49
50 #define QL4_DEF_QDEPTH 32
51
52 /*
53 * SCSI host template entry points
54 */
55 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
56
57 /*
58 * iSCSI template entry points
59 */
60 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
61 enum iscsi_tgt_dscvr type, uint32_t enable,
62 struct sockaddr *dst_addr);
63 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
64 enum iscsi_param param, char *buf);
65 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
66 enum iscsi_param param, char *buf);
67 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
68 enum iscsi_host_param param, char *buf);
69 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
70 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc);
71
72 /*
73 * SCSI host template entry points
74 */
75 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
76 void (*done) (struct scsi_cmnd *));
77 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
78 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd);
79 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
80 static int qla4xxx_slave_alloc(struct scsi_device *device);
81 static int qla4xxx_slave_configure(struct scsi_device *device);
82 static void qla4xxx_slave_destroy(struct scsi_device *sdev);
83 static void qla4xxx_scan_start(struct Scsi_Host *shost);
84
85 static struct scsi_host_template qla4xxx_driver_template = {
86 .module = THIS_MODULE,
87 .name = DRIVER_NAME,
88 .proc_name = DRIVER_NAME,
89 .queuecommand = qla4xxx_queuecommand,
90
91 .eh_device_reset_handler = qla4xxx_eh_device_reset,
92 .eh_target_reset_handler = qla4xxx_eh_target_reset,
93 .eh_host_reset_handler = qla4xxx_eh_host_reset,
94 .eh_timed_out = qla4xxx_eh_cmd_timed_out,
95
96 .slave_configure = qla4xxx_slave_configure,
97 .slave_alloc = qla4xxx_slave_alloc,
98 .slave_destroy = qla4xxx_slave_destroy,
99
100 .scan_finished = iscsi_scan_finished,
101 .scan_start = qla4xxx_scan_start,
102
103 .this_id = -1,
104 .cmd_per_lun = 3,
105 .use_clustering = ENABLE_CLUSTERING,
106 .sg_tablesize = SG_ALL,
107
108 .max_sectors = 0xFFFF,
109 };
110
111 static struct iscsi_transport qla4xxx_iscsi_transport = {
112 .owner = THIS_MODULE,
113 .name = DRIVER_NAME,
114 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
115 CAP_DATA_PATH_OFFLOAD,
116 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
117 ISCSI_TARGET_NAME | ISCSI_TPGT,
118 .host_param_mask = ISCSI_HOST_HWADDRESS |
119 ISCSI_HOST_IPADDRESS |
120 ISCSI_HOST_INITIATOR_NAME,
121 .tgt_dscvr = qla4xxx_tgt_dscvr,
122 .get_conn_param = qla4xxx_conn_get_param,
123 .get_session_param = qla4xxx_sess_get_param,
124 .get_host_param = qla4xxx_host_get_param,
125 .session_recovery_timedout = qla4xxx_recovery_timedout,
126 };
127
128 static struct scsi_transport_template *qla4xxx_scsi_transport;
129
130 static enum blk_eh_timer_return qla4xxx_eh_cmd_timed_out(struct scsi_cmnd *sc)
131 {
132 struct iscsi_cls_session *session;
133 struct ddb_entry *ddb_entry;
134
135 session = starget_to_session(scsi_target(sc->device));
136 ddb_entry = session->dd_data;
137
138 /* if we are not logged in then the LLD is going to clean up the cmd */
139 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
140 return BLK_EH_RESET_TIMER;
141 else
142 return BLK_EH_NOT_HANDLED;
143 }
144
145 static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session)
146 {
147 struct ddb_entry *ddb_entry = session->dd_data;
148 struct scsi_qla_host *ha = ddb_entry->ha;
149
150 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
151 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
152
153 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count "
154 "of (%d) secs exhausted, marking device DEAD.\n",
155 ha->host_no, __func__, ddb_entry->fw_ddb_index,
156 ha->port_down_retry_count));
157
158 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc "
159 "flags = 0x%lx\n",
160 ha->host_no, __func__, ha->dpc_flags));
161 queue_work(ha->dpc_thread, &ha->dpc_work);
162 }
163 }
164
165 static int qla4xxx_host_get_param(struct Scsi_Host *shost,
166 enum iscsi_host_param param, char *buf)
167 {
168 struct scsi_qla_host *ha = to_qla_host(shost);
169 int len;
170
171 switch (param) {
172 case ISCSI_HOST_PARAM_HWADDRESS:
173 len = sysfs_format_mac(buf, ha->my_mac, MAC_ADDR_LEN);
174 break;
175 case ISCSI_HOST_PARAM_IPADDRESS:
176 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
177 ha->ip_address[1], ha->ip_address[2],
178 ha->ip_address[3]);
179 break;
180 case ISCSI_HOST_PARAM_INITIATOR_NAME:
181 len = sprintf(buf, "%s\n", ha->name_string);
182 break;
183 default:
184 return -ENOSYS;
185 }
186
187 return len;
188 }
189
190 static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
191 enum iscsi_param param, char *buf)
192 {
193 struct ddb_entry *ddb_entry = sess->dd_data;
194 int len;
195
196 switch (param) {
197 case ISCSI_PARAM_TARGET_NAME:
198 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
199 ddb_entry->iscsi_name);
200 break;
201 case ISCSI_PARAM_TPGT:
202 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
203 break;
204 default:
205 return -ENOSYS;
206 }
207
208 return len;
209 }
210
211 static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
212 enum iscsi_param param, char *buf)
213 {
214 struct iscsi_cls_session *session;
215 struct ddb_entry *ddb_entry;
216 int len;
217
218 session = iscsi_dev_to_session(conn->dev.parent);
219 ddb_entry = session->dd_data;
220
221 switch (param) {
222 case ISCSI_PARAM_CONN_PORT:
223 len = sprintf(buf, "%hu\n", ddb_entry->port);
224 break;
225 case ISCSI_PARAM_CONN_ADDRESS:
226 /* TODO: what are the ipv6 bits */
227 len = sprintf(buf, "%pI4\n", &ddb_entry->ip_addr);
228 break;
229 default:
230 return -ENOSYS;
231 }
232
233 return len;
234 }
235
236 static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
237 enum iscsi_tgt_dscvr type, uint32_t enable,
238 struct sockaddr *dst_addr)
239 {
240 struct scsi_qla_host *ha;
241 struct sockaddr_in *addr;
242 struct sockaddr_in6 *addr6;
243 int ret = 0;
244
245 ha = (struct scsi_qla_host *) shost->hostdata;
246
247 switch (type) {
248 case ISCSI_TGT_DSCVR_SEND_TARGETS:
249 if (dst_addr->sa_family == AF_INET) {
250 addr = (struct sockaddr_in *)dst_addr;
251 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
252 addr->sin_port) != QLA_SUCCESS)
253 ret = -EIO;
254 } else if (dst_addr->sa_family == AF_INET6) {
255 /*
256 * TODO: fix qla4xxx_send_tgts
257 */
258 addr6 = (struct sockaddr_in6 *)dst_addr;
259 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
260 addr6->sin6_port) != QLA_SUCCESS)
261 ret = -EIO;
262 } else
263 ret = -ENOSYS;
264 break;
265 default:
266 ret = -ENOSYS;
267 }
268 return ret;
269 }
270
271 void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
272 {
273 if (!ddb_entry->sess)
274 return;
275
276 if (ddb_entry->conn) {
277 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
278 iscsi_remove_session(ddb_entry->sess);
279 }
280 iscsi_free_session(ddb_entry->sess);
281 }
282
283 int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
284 {
285 int err;
286
287 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
288 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
289 if (err) {
290 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
291 return err;
292 }
293
294 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0, 0);
295 if (!ddb_entry->conn) {
296 iscsi_remove_session(ddb_entry->sess);
297 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
298 return -ENOMEM;
299 }
300
301 /* finally ready to go */
302 iscsi_unblock_session(ddb_entry->sess);
303 return 0;
304 }
305
306 struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
307 {
308 struct ddb_entry *ddb_entry;
309 struct iscsi_cls_session *sess;
310
311 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport,
312 sizeof(struct ddb_entry));
313 if (!sess)
314 return NULL;
315
316 ddb_entry = sess->dd_data;
317 memset(ddb_entry, 0, sizeof(*ddb_entry));
318 ddb_entry->ha = ha;
319 ddb_entry->sess = sess;
320 return ddb_entry;
321 }
322
323 static void qla4xxx_scan_start(struct Scsi_Host *shost)
324 {
325 struct scsi_qla_host *ha = shost_priv(shost);
326 struct ddb_entry *ddb_entry, *ddbtemp;
327
328 /* finish setup of sessions that were already setup in firmware */
329 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
330 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
331 qla4xxx_add_sess(ddb_entry);
332 }
333 }
334
335 /*
336 * Timer routines
337 */
338
339 static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
340 unsigned long interval)
341 {
342 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
343 __func__, ha->host->host_no));
344 init_timer(&ha->timer);
345 ha->timer.expires = jiffies + interval * HZ;
346 ha->timer.data = (unsigned long)ha;
347 ha->timer.function = (void (*)(unsigned long))func;
348 add_timer(&ha->timer);
349 ha->timer_active = 1;
350 }
351
352 static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
353 {
354 del_timer_sync(&ha->timer);
355 ha->timer_active = 0;
356 }
357
358 /***
359 * qla4xxx_mark_device_missing - mark a device as missing.
360 * @ha: Pointer to host adapter structure.
361 * @ddb_entry: Pointer to device database entry
362 *
363 * This routine marks a device missing and resets the relogin retry count.
364 **/
365 void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
366 struct ddb_entry *ddb_entry)
367 {
368 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
369 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
370 ha->host_no, ddb_entry->bus, ddb_entry->target,
371 ddb_entry->fw_ddb_index));
372 iscsi_block_session(ddb_entry->sess);
373 iscsi_conn_error_event(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
374 }
375
376 static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
377 struct ddb_entry *ddb_entry,
378 struct scsi_cmnd *cmd,
379 void (*done)(struct scsi_cmnd *))
380 {
381 struct srb *srb;
382
383 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
384 if (!srb)
385 return srb;
386
387 atomic_set(&srb->ref_count, 1);
388 srb->ha = ha;
389 srb->ddb = ddb_entry;
390 srb->cmd = cmd;
391 srb->flags = 0;
392 cmd->SCp.ptr = (void *)srb;
393 cmd->scsi_done = done;
394
395 return srb;
396 }
397
398 static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
399 {
400 struct scsi_cmnd *cmd = srb->cmd;
401
402 if (srb->flags & SRB_DMA_VALID) {
403 scsi_dma_unmap(cmd);
404 srb->flags &= ~SRB_DMA_VALID;
405 }
406 cmd->SCp.ptr = NULL;
407 }
408
409 void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
410 {
411 struct scsi_cmnd *cmd = srb->cmd;
412
413 qla4xxx_srb_free_dma(ha, srb);
414
415 mempool_free(srb, ha->srb_mempool);
416
417 cmd->scsi_done(cmd);
418 }
419
420 /**
421 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
422 * @cmd: Pointer to Linux's SCSI command structure
423 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
424 * that the command has been processed.
425 *
426 * Remarks:
427 * This routine is invoked by Linux to send a SCSI command to the driver.
428 * The mid-level driver tries to ensure that queuecommand never gets
429 * invoked concurrently with itself or the interrupt handler (although
430 * the interrupt handler may call this routine as part of request-
431 * completion handling). Unfortunely, it sometimes calls the scheduler
432 * in interrupt context which is a big NO! NO!.
433 **/
434 static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
435 void (*done)(struct scsi_cmnd *))
436 {
437 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
438 struct ddb_entry *ddb_entry = cmd->device->hostdata;
439 struct iscsi_cls_session *sess = ddb_entry->sess;
440 struct srb *srb;
441 int rval;
442
443 if (!sess) {
444 cmd->result = DID_IMM_RETRY << 16;
445 goto qc_fail_command;
446 }
447
448 rval = iscsi_session_chkready(sess);
449 if (rval) {
450 cmd->result = rval;
451 goto qc_fail_command;
452 }
453
454 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
455 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
456 cmd->result = DID_NO_CONNECT << 16;
457 goto qc_fail_command;
458 }
459 return SCSI_MLQUEUE_TARGET_BUSY;
460 }
461
462 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
463 goto qc_host_busy;
464
465 spin_unlock_irq(ha->host->host_lock);
466
467 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
468 if (!srb)
469 goto qc_host_busy_lock;
470
471 rval = qla4xxx_send_command_to_isp(ha, srb);
472 if (rval != QLA_SUCCESS)
473 goto qc_host_busy_free_sp;
474
475 spin_lock_irq(ha->host->host_lock);
476 return 0;
477
478 qc_host_busy_free_sp:
479 qla4xxx_srb_free_dma(ha, srb);
480 mempool_free(srb, ha->srb_mempool);
481
482 qc_host_busy_lock:
483 spin_lock_irq(ha->host->host_lock);
484
485 qc_host_busy:
486 return SCSI_MLQUEUE_HOST_BUSY;
487
488 qc_fail_command:
489 done(cmd);
490
491 return 0;
492 }
493
494 /**
495 * qla4xxx_mem_free - frees memory allocated to adapter
496 * @ha: Pointer to host adapter structure.
497 *
498 * Frees memory previously allocated by qla4xxx_mem_alloc
499 **/
500 static void qla4xxx_mem_free(struct scsi_qla_host *ha)
501 {
502 if (ha->queues)
503 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
504 ha->queues_dma);
505
506 ha->queues_len = 0;
507 ha->queues = NULL;
508 ha->queues_dma = 0;
509 ha->request_ring = NULL;
510 ha->request_dma = 0;
511 ha->response_ring = NULL;
512 ha->response_dma = 0;
513 ha->shadow_regs = NULL;
514 ha->shadow_regs_dma = 0;
515
516 /* Free srb pool. */
517 if (ha->srb_mempool)
518 mempool_destroy(ha->srb_mempool);
519
520 ha->srb_mempool = NULL;
521
522 /* release io space registers */
523 if (ha->reg)
524 iounmap(ha->reg);
525 pci_release_regions(ha->pdev);
526 }
527
528 /**
529 * qla4xxx_mem_alloc - allocates memory for use by adapter.
530 * @ha: Pointer to host adapter structure
531 *
532 * Allocates DMA memory for request and response queues. Also allocates memory
533 * for srbs.
534 **/
535 static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
536 {
537 unsigned long align;
538
539 /* Allocate contiguous block of DMA memory for queues. */
540 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
541 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
542 sizeof(struct shadow_regs) +
543 MEM_ALIGN_VALUE +
544 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
545 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
546 &ha->queues_dma, GFP_KERNEL);
547 if (ha->queues == NULL) {
548 dev_warn(&ha->pdev->dev,
549 "Memory Allocation failed - queues.\n");
550
551 goto mem_alloc_error_exit;
552 }
553 memset(ha->queues, 0, ha->queues_len);
554
555 /*
556 * As per RISC alignment requirements -- the bus-address must be a
557 * multiple of the request-ring size (in bytes).
558 */
559 align = 0;
560 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
561 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
562 (MEM_ALIGN_VALUE - 1));
563
564 /* Update request and response queue pointers. */
565 ha->request_dma = ha->queues_dma + align;
566 ha->request_ring = (struct queue_entry *) (ha->queues + align);
567 ha->response_dma = ha->queues_dma + align +
568 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
569 ha->response_ring = (struct queue_entry *) (ha->queues + align +
570 (REQUEST_QUEUE_DEPTH *
571 QUEUE_SIZE));
572 ha->shadow_regs_dma = ha->queues_dma + align +
573 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
574 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
575 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
576 (REQUEST_QUEUE_DEPTH *
577 QUEUE_SIZE) +
578 (RESPONSE_QUEUE_DEPTH *
579 QUEUE_SIZE));
580
581 /* Allocate memory for srb pool. */
582 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
583 mempool_free_slab, srb_cachep);
584 if (ha->srb_mempool == NULL) {
585 dev_warn(&ha->pdev->dev,
586 "Memory Allocation failed - SRB Pool.\n");
587
588 goto mem_alloc_error_exit;
589 }
590
591 return QLA_SUCCESS;
592
593 mem_alloc_error_exit:
594 qla4xxx_mem_free(ha);
595 return QLA_ERROR;
596 }
597
598 /**
599 * qla4xxx_timer - checks every second for work to do.
600 * @ha: Pointer to host adapter structure.
601 **/
602 static void qla4xxx_timer(struct scsi_qla_host *ha)
603 {
604 struct ddb_entry *ddb_entry, *dtemp;
605 int start_dpc = 0;
606
607 /* Search for relogin's to time-out and port down retry. */
608 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
609 /* Count down time between sending relogins */
610 if (adapter_up(ha) &&
611 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
612 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
613 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
614 INVALID_ENTRY) {
615 if (atomic_read(&ddb_entry->retry_relogin_timer)
616 == 0) {
617 atomic_set(&ddb_entry->
618 retry_relogin_timer,
619 INVALID_ENTRY);
620 set_bit(DPC_RELOGIN_DEVICE,
621 &ha->dpc_flags);
622 set_bit(DF_RELOGIN, &ddb_entry->flags);
623 DEBUG2(printk("scsi%ld: %s: index [%d]"
624 " login device\n",
625 ha->host_no, __func__,
626 ddb_entry->fw_ddb_index));
627 } else
628 atomic_dec(&ddb_entry->
629 retry_relogin_timer);
630 }
631 }
632
633 /* Wait for relogin to timeout */
634 if (atomic_read(&ddb_entry->relogin_timer) &&
635 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
636 /*
637 * If the relogin times out and the device is
638 * still NOT ONLINE then try and relogin again.
639 */
640 if (atomic_read(&ddb_entry->state) !=
641 DDB_STATE_ONLINE &&
642 ddb_entry->fw_ddb_device_state ==
643 DDB_DS_SESSION_FAILED) {
644 /* Reset retry relogin timer */
645 atomic_inc(&ddb_entry->relogin_retry_count);
646 DEBUG2(printk("scsi%ld: index[%d] relogin"
647 " timed out-retrying"
648 " relogin (%d)\n",
649 ha->host_no,
650 ddb_entry->fw_ddb_index,
651 atomic_read(&ddb_entry->
652 relogin_retry_count))
653 );
654 start_dpc++;
655 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
656 "initate relogin after"
657 " %d seconds\n",
658 ha->host_no, ddb_entry->bus,
659 ddb_entry->target,
660 ddb_entry->fw_ddb_index,
661 ddb_entry->default_time2wait + 4)
662 );
663
664 atomic_set(&ddb_entry->retry_relogin_timer,
665 ddb_entry->default_time2wait + 4);
666 }
667 }
668 }
669
670 /* Check for heartbeat interval. */
671 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
672 ha->heartbeat_interval != 0) {
673 ha->seconds_since_last_heartbeat++;
674 if (ha->seconds_since_last_heartbeat >
675 ha->heartbeat_interval + 2)
676 set_bit(DPC_RESET_HA, &ha->dpc_flags);
677 }
678
679
680 /* Wakeup the dpc routine for this adapter, if needed. */
681 if ((start_dpc ||
682 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
683 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
684 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
685 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
686 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
687 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
688 test_bit(DPC_AEN, &ha->dpc_flags)) &&
689 ha->dpc_thread) {
690 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
691 " - dpc flags = 0x%lx\n",
692 ha->host_no, __func__, ha->dpc_flags));
693 queue_work(ha->dpc_thread, &ha->dpc_work);
694 }
695
696 /* Reschedule timer thread to call us back in one second */
697 mod_timer(&ha->timer, jiffies + HZ);
698
699 DEBUG2(ha->seconds_since_last_intr++);
700 }
701
702 /**
703 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
704 * @ha: Pointer to host adapter structure.
705 *
706 * This routine stalls the driver until all outstanding commands are returned.
707 * Caller must release the Hardware Lock prior to calling this routine.
708 **/
709 static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
710 {
711 uint32_t index = 0;
712 int stat = QLA_SUCCESS;
713 unsigned long flags;
714 struct scsi_cmnd *cmd;
715 int wait_cnt = WAIT_CMD_TOV; /*
716 * Initialized for 30 seconds as we
717 * expect all commands to retuned
718 * ASAP.
719 */
720
721 while (wait_cnt) {
722 spin_lock_irqsave(&ha->hardware_lock, flags);
723 /* Find a command that hasn't completed. */
724 for (index = 0; index < ha->host->can_queue; index++) {
725 cmd = scsi_host_find_tag(ha->host, index);
726 if (cmd != NULL)
727 break;
728 }
729 spin_unlock_irqrestore(&ha->hardware_lock, flags);
730
731 /* If No Commands are pending, wait is complete */
732 if (index == ha->host->can_queue) {
733 break;
734 }
735
736 /* If we timed out on waiting for commands to come back
737 * return ERROR.
738 */
739 wait_cnt--;
740 if (wait_cnt == 0)
741 stat = QLA_ERROR;
742 else {
743 msleep(1000);
744 }
745 } /* End of While (wait_cnt) */
746
747 return stat;
748 }
749
750 void qla4xxx_hw_reset(struct scsi_qla_host *ha)
751 {
752 uint32_t ctrl_status;
753 unsigned long flags = 0;
754
755 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
756
757 spin_lock_irqsave(&ha->hardware_lock, flags);
758
759 /*
760 * If the SCSI Reset Interrupt bit is set, clear it.
761 * Otherwise, the Soft Reset won't work.
762 */
763 ctrl_status = readw(&ha->reg->ctrl_status);
764 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
765 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
766
767 /* Issue Soft Reset */
768 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
769 readl(&ha->reg->ctrl_status);
770
771 spin_unlock_irqrestore(&ha->hardware_lock, flags);
772 }
773
774 /**
775 * qla4xxx_soft_reset - performs soft reset.
776 * @ha: Pointer to host adapter structure.
777 **/
778 int qla4xxx_soft_reset(struct scsi_qla_host *ha)
779 {
780 uint32_t max_wait_time;
781 unsigned long flags = 0;
782 int status = QLA_ERROR;
783 uint32_t ctrl_status;
784
785 qla4xxx_hw_reset(ha);
786
787 /* Wait until the Network Reset Intr bit is cleared */
788 max_wait_time = RESET_INTR_TOV;
789 do {
790 spin_lock_irqsave(&ha->hardware_lock, flags);
791 ctrl_status = readw(&ha->reg->ctrl_status);
792 spin_unlock_irqrestore(&ha->hardware_lock, flags);
793
794 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
795 break;
796
797 msleep(1000);
798 } while ((--max_wait_time));
799
800 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
801 DEBUG2(printk(KERN_WARNING
802 "scsi%ld: Network Reset Intr not cleared by "
803 "Network function, clearing it now!\n",
804 ha->host_no));
805 spin_lock_irqsave(&ha->hardware_lock, flags);
806 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
807 readl(&ha->reg->ctrl_status);
808 spin_unlock_irqrestore(&ha->hardware_lock, flags);
809 }
810
811 /* Wait until the firmware tells us the Soft Reset is done */
812 max_wait_time = SOFT_RESET_TOV;
813 do {
814 spin_lock_irqsave(&ha->hardware_lock, flags);
815 ctrl_status = readw(&ha->reg->ctrl_status);
816 spin_unlock_irqrestore(&ha->hardware_lock, flags);
817
818 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
819 status = QLA_SUCCESS;
820 break;
821 }
822
823 msleep(1000);
824 } while ((--max_wait_time));
825
826 /*
827 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
828 * after the soft reset has taken place.
829 */
830 spin_lock_irqsave(&ha->hardware_lock, flags);
831 ctrl_status = readw(&ha->reg->ctrl_status);
832 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
833 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
834 readl(&ha->reg->ctrl_status);
835 }
836 spin_unlock_irqrestore(&ha->hardware_lock, flags);
837
838 /* If soft reset fails then most probably the bios on other
839 * function is also enabled.
840 * Since the initialization is sequential the other fn
841 * wont be able to acknowledge the soft reset.
842 * Issue a force soft reset to workaround this scenario.
843 */
844 if (max_wait_time == 0) {
845 /* Issue Force Soft Reset */
846 spin_lock_irqsave(&ha->hardware_lock, flags);
847 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
848 readl(&ha->reg->ctrl_status);
849 spin_unlock_irqrestore(&ha->hardware_lock, flags);
850 /* Wait until the firmware tells us the Soft Reset is done */
851 max_wait_time = SOFT_RESET_TOV;
852 do {
853 spin_lock_irqsave(&ha->hardware_lock, flags);
854 ctrl_status = readw(&ha->reg->ctrl_status);
855 spin_unlock_irqrestore(&ha->hardware_lock, flags);
856
857 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
858 status = QLA_SUCCESS;
859 break;
860 }
861
862 msleep(1000);
863 } while ((--max_wait_time));
864 }
865
866 return status;
867 }
868
869 /**
870 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
871 * @ha: Pointer to host adapter structure.
872 *
873 * This routine is called just prior to a HARD RESET to return all
874 * outstanding commands back to the Operating System.
875 * Caller should make sure that the following locks are released
876 * before this calling routine: Hardware lock, and io_request_lock.
877 **/
878 static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
879 {
880 struct srb *srb;
881 int i;
882 unsigned long flags;
883
884 spin_lock_irqsave(&ha->hardware_lock, flags);
885 for (i = 0; i < ha->host->can_queue; i++) {
886 srb = qla4xxx_del_from_active_array(ha, i);
887 if (srb != NULL) {
888 srb->cmd->result = DID_RESET << 16;
889 qla4xxx_srb_compl(ha, srb);
890 }
891 }
892 spin_unlock_irqrestore(&ha->hardware_lock, flags);
893
894 }
895
896 /**
897 * qla4xxx_recover_adapter - recovers adapter after a fatal error
898 * @ha: Pointer to host adapter structure.
899 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
900 *
901 * renew_ddb_list value can be 0=preserve ddb list, 1=destroy and rebuild
902 * ddb list.
903 **/
904 static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
905 uint8_t renew_ddb_list)
906 {
907 int status;
908
909 /* Stall incoming I/O until we are done */
910 clear_bit(AF_ONLINE, &ha->flags);
911
912 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
913 __func__));
914
915 /* Wait for outstanding commands to complete.
916 * Stalls the driver for max 30 secs
917 */
918 status = qla4xxx_cmd_wait(ha);
919
920 qla4xxx_disable_intrs(ha);
921
922 /* Flush any pending ddb changed AENs */
923 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
924
925 qla4xxx_flush_active_srbs(ha);
926
927 /* Reset the firmware. If successful, function
928 * returns with ISP interrupts enabled.
929 */
930 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
931 ha->host_no, __func__));
932 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
933 status = qla4xxx_soft_reset(ha);
934 else
935 status = QLA_ERROR;
936
937 /* Flush any pending ddb changed AENs */
938 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
939
940 /* Re-initialize firmware. If successful, function returns
941 * with ISP interrupts enabled */
942 if (status == QLA_SUCCESS) {
943 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
944 ha->host_no, __func__));
945
946 /* If successful, AF_ONLINE flag set in
947 * qla4xxx_initialize_adapter */
948 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
949 }
950
951 /* Failed adapter initialization?
952 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
953 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
954 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
955 /* Adapter initialization failed, see if we can retry
956 * resetting the ha */
957 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
958 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
959 DEBUG2(printk("scsi%ld: recover adapter - retrying "
960 "(%d) more times\n", ha->host_no,
961 ha->retry_reset_ha_cnt));
962 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
963 status = QLA_ERROR;
964 } else {
965 if (ha->retry_reset_ha_cnt > 0) {
966 /* Schedule another Reset HA--DPC will retry */
967 ha->retry_reset_ha_cnt--;
968 DEBUG2(printk("scsi%ld: recover adapter - "
969 "retry remaining %d\n",
970 ha->host_no,
971 ha->retry_reset_ha_cnt));
972 status = QLA_ERROR;
973 }
974
975 if (ha->retry_reset_ha_cnt == 0) {
976 /* Recover adapter retries have been exhausted.
977 * Adapter DEAD */
978 DEBUG2(printk("scsi%ld: recover adapter "
979 "failed - board disabled\n",
980 ha->host_no));
981 qla4xxx_flush_active_srbs(ha);
982 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
983 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
984 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
985 &ha->dpc_flags);
986 status = QLA_ERROR;
987 }
988 }
989 } else {
990 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
991 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
992 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
993 }
994
995 ha->adapter_error_count++;
996
997 if (status == QLA_SUCCESS)
998 qla4xxx_enable_intrs(ha);
999
1000 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
1001 return status;
1002 }
1003
1004 /**
1005 * qla4xxx_do_dpc - dpc routine
1006 * @data: in our case pointer to adapter structure
1007 *
1008 * This routine is a task that is schedule by the interrupt handler
1009 * to perform the background processing for interrupts. We put it
1010 * on a task queue that is consumed whenever the scheduler runs; that's
1011 * so you can do anything (i.e. put the process to sleep etc). In fact,
1012 * the mid-level tries to sleep when it reaches the driver threshold
1013 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1014 **/
1015 static void qla4xxx_do_dpc(struct work_struct *work)
1016 {
1017 struct scsi_qla_host *ha =
1018 container_of(work, struct scsi_qla_host, dpc_work);
1019 struct ddb_entry *ddb_entry, *dtemp;
1020 int status = QLA_ERROR;
1021
1022 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
1023 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1024 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1025 readw(&ha->reg->ctrl_status)));
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 test_bit(DPC_RESET_HA, &ha->dpc_flags))
1037 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1038
1039 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
1040 uint8_t wait_time = RESET_INTR_TOV;
1041
1042 while ((readw(&ha->reg->ctrl_status) &
1043 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1044 if (--wait_time == 0)
1045 break;
1046 msleep(1000);
1047 }
1048 if (wait_time == 0)
1049 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1050 "bit not cleared-- resetting\n",
1051 ha->host_no, __func__));
1052 qla4xxx_flush_active_srbs(ha);
1053 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1054 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1055 status = qla4xxx_initialize_adapter(ha,
1056 PRESERVE_DDB_LIST);
1057 }
1058 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1059 if (status == QLA_SUCCESS)
1060 qla4xxx_enable_intrs(ha);
1061 }
1062 }
1063
1064 /* ---- process AEN? --- */
1065 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1066 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1067
1068 /* ---- Get DHCP IP Address? --- */
1069 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1070 qla4xxx_get_dhcp_ip_address(ha);
1071
1072 /* ---- relogin device? --- */
1073 if (adapter_up(ha) &&
1074 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1075 list_for_each_entry_safe(ddb_entry, dtemp,
1076 &ha->ddb_list, list) {
1077 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1078 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1079 qla4xxx_relogin_device(ha, ddb_entry);
1080
1081 /*
1082 * If mbx cmd times out there is no point
1083 * in continuing further.
1084 * With large no of targets this can hang
1085 * the system.
1086 */
1087 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1088 printk(KERN_WARNING "scsi%ld: %s: "
1089 "need to reset hba\n",
1090 ha->host_no, __func__);
1091 break;
1092 }
1093 }
1094 }
1095 }
1096
1097 /**
1098 * qla4xxx_free_adapter - release the adapter
1099 * @ha: pointer to adapter structure
1100 **/
1101 static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1102 {
1103
1104 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1105 /* Turn-off interrupts on the card. */
1106 qla4xxx_disable_intrs(ha);
1107 }
1108
1109 /* Kill the kernel thread for this host */
1110 if (ha->dpc_thread)
1111 destroy_workqueue(ha->dpc_thread);
1112
1113 /* Issue Soft Reset to put firmware in unknown state */
1114 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
1115 qla4xxx_hw_reset(ha);
1116
1117 /* Remove timer thread, if present */
1118 if (ha->timer_active)
1119 qla4xxx_stop_timer(ha);
1120
1121 /* Detach interrupts */
1122 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1123 free_irq(ha->pdev->irq, ha);
1124
1125 /* free extra memory */
1126 qla4xxx_mem_free(ha);
1127
1128 pci_disable_device(ha->pdev);
1129
1130 }
1131
1132 /***
1133 * qla4xxx_iospace_config - maps registers
1134 * @ha: pointer to adapter structure
1135 *
1136 * This routines maps HBA's registers from the pci address space
1137 * into the kernel virtual address space for memory mapped i/o.
1138 **/
1139 static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1140 {
1141 unsigned long pio, pio_len, pio_flags;
1142 unsigned long mmio, mmio_len, mmio_flags;
1143
1144 pio = pci_resource_start(ha->pdev, 0);
1145 pio_len = pci_resource_len(ha->pdev, 0);
1146 pio_flags = pci_resource_flags(ha->pdev, 0);
1147 if (pio_flags & IORESOURCE_IO) {
1148 if (pio_len < MIN_IOBASE_LEN) {
1149 dev_warn(&ha->pdev->dev,
1150 "Invalid PCI I/O region size\n");
1151 pio = 0;
1152 }
1153 } else {
1154 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1155 pio = 0;
1156 }
1157
1158 /* Use MMIO operations for all accesses. */
1159 mmio = pci_resource_start(ha->pdev, 1);
1160 mmio_len = pci_resource_len(ha->pdev, 1);
1161 mmio_flags = pci_resource_flags(ha->pdev, 1);
1162
1163 if (!(mmio_flags & IORESOURCE_MEM)) {
1164 dev_err(&ha->pdev->dev,
1165 "region #0 not an MMIO resource, aborting\n");
1166
1167 goto iospace_error_exit;
1168 }
1169 if (mmio_len < MIN_IOBASE_LEN) {
1170 dev_err(&ha->pdev->dev,
1171 "Invalid PCI mem region size, aborting\n");
1172 goto iospace_error_exit;
1173 }
1174
1175 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1176 dev_warn(&ha->pdev->dev,
1177 "Failed to reserve PIO/MMIO regions\n");
1178
1179 goto iospace_error_exit;
1180 }
1181
1182 ha->pio_address = pio;
1183 ha->pio_length = pio_len;
1184 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1185 if (!ha->reg) {
1186 dev_err(&ha->pdev->dev,
1187 "cannot remap MMIO, aborting\n");
1188
1189 goto iospace_error_exit;
1190 }
1191
1192 return 0;
1193
1194 iospace_error_exit:
1195 return -ENOMEM;
1196 }
1197
1198 /**
1199 * qla4xxx_probe_adapter - callback function to probe HBA
1200 * @pdev: pointer to pci_dev structure
1201 * @pci_device_id: pointer to pci_device entry
1202 *
1203 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1204 * It returns zero if successful. It also initializes all data necessary for
1205 * the driver.
1206 **/
1207 static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1208 const struct pci_device_id *ent)
1209 {
1210 int ret = -ENODEV, status;
1211 struct Scsi_Host *host;
1212 struct scsi_qla_host *ha;
1213 uint8_t init_retry_count = 0;
1214 char buf[34];
1215
1216 if (pci_enable_device(pdev))
1217 return -1;
1218
1219 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1220 if (host == NULL) {
1221 printk(KERN_WARNING
1222 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1223 goto probe_disable_device;
1224 }
1225
1226 /* Clear our data area */
1227 ha = (struct scsi_qla_host *) host->hostdata;
1228 memset(ha, 0, sizeof(*ha));
1229
1230 /* Save the information from PCI BIOS. */
1231 ha->pdev = pdev;
1232 ha->host = host;
1233 ha->host_no = host->host_no;
1234
1235 /* Configure PCI I/O space. */
1236 ret = qla4xxx_iospace_config(ha);
1237 if (ret)
1238 goto probe_failed;
1239
1240 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1241 pdev->device, pdev->irq, ha->reg);
1242
1243 qla4xxx_config_dma_addressing(ha);
1244
1245 /* Initialize lists and spinlocks. */
1246 INIT_LIST_HEAD(&ha->ddb_list);
1247 INIT_LIST_HEAD(&ha->free_srb_q);
1248
1249 mutex_init(&ha->mbox_sem);
1250
1251 spin_lock_init(&ha->hardware_lock);
1252
1253 /* Allocate dma buffers */
1254 if (qla4xxx_mem_alloc(ha)) {
1255 dev_warn(&ha->pdev->dev,
1256 "[ERROR] Failed to allocate memory for adapter\n");
1257
1258 ret = -ENOMEM;
1259 goto probe_failed;
1260 }
1261
1262 /*
1263 * Initialize the Host adapter request/response queues and
1264 * firmware
1265 * NOTE: interrupts enabled upon successful completion
1266 */
1267 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1268 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1269 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1270 "(%d)\n", __func__, init_retry_count));
1271 qla4xxx_soft_reset(ha);
1272 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1273 }
1274 if (status == QLA_ERROR) {
1275 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1276
1277 ret = -ENODEV;
1278 goto probe_failed;
1279 }
1280
1281 host->cmd_per_lun = 3;
1282 host->max_channel = 0;
1283 host->max_lun = MAX_LUNS - 1;
1284 host->max_id = MAX_TARGETS;
1285 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1286 host->can_queue = MAX_SRBS ;
1287 host->transportt = qla4xxx_scsi_transport;
1288
1289 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1290 if (ret) {
1291 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed\n");
1292 goto probe_failed;
1293 }
1294
1295 /* Startup the kernel thread for this host adapter. */
1296 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1297 "qla4xxx_dpc\n", __func__));
1298 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1299 ha->dpc_thread = create_singlethread_workqueue(buf);
1300 if (!ha->dpc_thread) {
1301 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1302 ret = -ENODEV;
1303 goto probe_failed;
1304 }
1305 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
1306
1307 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
1308 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
1309 if (ret) {
1310 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1311 " already in use.\n", pdev->irq);
1312 goto probe_failed;
1313 }
1314 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1315 host->irq = pdev->irq;
1316 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1317
1318 qla4xxx_enable_intrs(ha);
1319
1320 /* Start timer thread. */
1321 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1322
1323 set_bit(AF_INIT_DONE, &ha->flags);
1324
1325 pci_set_drvdata(pdev, ha);
1326
1327 ret = scsi_add_host(host, &pdev->dev);
1328 if (ret)
1329 goto probe_failed;
1330
1331 printk(KERN_INFO
1332 " QLogic iSCSI HBA Driver version: %s\n"
1333 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1334 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1335 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1336 ha->patch_number, ha->build_number);
1337 scsi_scan_host(host);
1338 return 0;
1339
1340 probe_failed:
1341 qla4xxx_free_adapter(ha);
1342 scsi_host_put(ha->host);
1343
1344 probe_disable_device:
1345 pci_disable_device(pdev);
1346
1347 return ret;
1348 }
1349
1350 /**
1351 * qla4xxx_remove_adapter - calback function to remove adapter.
1352 * @pci_dev: PCI device pointer
1353 **/
1354 static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1355 {
1356 struct scsi_qla_host *ha;
1357
1358 ha = pci_get_drvdata(pdev);
1359
1360 qla4xxx_disable_intrs(ha);
1361
1362 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1363 ssleep(1);
1364
1365 /* remove devs from iscsi_sessions to scsi_devices */
1366 qla4xxx_free_ddb_list(ha);
1367
1368 scsi_remove_host(ha->host);
1369
1370 qla4xxx_free_adapter(ha);
1371
1372 scsi_host_put(ha->host);
1373
1374 pci_set_drvdata(pdev, NULL);
1375 }
1376
1377 /**
1378 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1379 * @ha: HA context
1380 *
1381 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1382 * supported addressing method.
1383 */
1384 static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
1385 {
1386 int retval;
1387
1388 /* Update our PCI device dma_mask for full 64 bit mask */
1389 if (pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(64)) == 0) {
1390 if (pci_set_consistent_dma_mask(ha->pdev, DMA_BIT_MASK(64))) {
1391 dev_dbg(&ha->pdev->dev,
1392 "Failed to set 64 bit PCI consistent mask; "
1393 "using 32 bit.\n");
1394 retval = pci_set_consistent_dma_mask(ha->pdev,
1395 DMA_BIT_MASK(32));
1396 }
1397 } else
1398 retval = pci_set_dma_mask(ha->pdev, DMA_BIT_MASK(32));
1399 }
1400
1401 static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1402 {
1403 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1404 struct ddb_entry *ddb = sess->dd_data;
1405
1406 sdev->hostdata = ddb;
1407 sdev->tagged_supported = 1;
1408 scsi_activate_tcq(sdev, QL4_DEF_QDEPTH);
1409 return 0;
1410 }
1411
1412 static int qla4xxx_slave_configure(struct scsi_device *sdev)
1413 {
1414 sdev->tagged_supported = 1;
1415 return 0;
1416 }
1417
1418 static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1419 {
1420 scsi_deactivate_tcq(sdev, 1);
1421 }
1422
1423 /**
1424 * qla4xxx_del_from_active_array - returns an active srb
1425 * @ha: Pointer to host adapter structure.
1426 * @index: index into the active_array
1427 *
1428 * This routine removes and returns the srb at the specified index
1429 **/
1430 struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1431 {
1432 struct srb *srb = NULL;
1433 struct scsi_cmnd *cmd;
1434
1435 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1436 return srb;
1437
1438 if (!(srb = (struct srb *)cmd->host_scribble))
1439 return srb;
1440
1441 /* update counters */
1442 if (srb->flags & SRB_DMA_VALID) {
1443 ha->req_q_count += srb->iocb_cnt;
1444 ha->iocb_cnt -= srb->iocb_cnt;
1445 if (srb->cmd)
1446 srb->cmd->host_scribble = NULL;
1447 }
1448 return srb;
1449 }
1450
1451 /**
1452 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1453 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1454 * @cmd: Scsi Command to wait on.
1455 *
1456 * This routine waits for the command to be returned by the Firmware
1457 * for some max time.
1458 **/
1459 static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1460 struct scsi_cmnd *cmd)
1461 {
1462 int done = 0;
1463 struct srb *rp;
1464 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1465
1466 do {
1467 /* Checking to see if its returned to OS */
1468 rp = (struct srb *) cmd->SCp.ptr;
1469 if (rp == NULL) {
1470 done++;
1471 break;
1472 }
1473
1474 msleep(2000);
1475 } while (max_wait_time--);
1476
1477 return done;
1478 }
1479
1480 /**
1481 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1482 * @ha: Pointer to host adapter structure
1483 **/
1484 static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1485 {
1486 unsigned long wait_online;
1487
1488 wait_online = jiffies + (30 * HZ);
1489 while (time_before(jiffies, wait_online)) {
1490
1491 if (adapter_up(ha))
1492 return QLA_SUCCESS;
1493 else if (ha->retry_reset_ha_cnt == 0)
1494 return QLA_ERROR;
1495
1496 msleep(2000);
1497 }
1498
1499 return QLA_ERROR;
1500 }
1501
1502 /**
1503 * qla4xxx_eh_wait_for_commands - wait for active cmds to finish.
1504 * @ha: pointer to HBA
1505 * @t: target id
1506 * @l: lun id
1507 *
1508 * This function waits for all outstanding commands to a lun to complete. It
1509 * returns 0 if all pending commands are returned and 1 otherwise.
1510 **/
1511 static int qla4xxx_eh_wait_for_commands(struct scsi_qla_host *ha,
1512 struct scsi_target *stgt,
1513 struct scsi_device *sdev)
1514 {
1515 int cnt;
1516 int status = 0;
1517 struct scsi_cmnd *cmd;
1518
1519 /*
1520 * Waiting for all commands for the designated target or dev
1521 * in the active array
1522 */
1523 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1524 cmd = scsi_host_find_tag(ha->host, cnt);
1525 if (cmd && stgt == scsi_target(cmd->device) &&
1526 (!sdev || sdev == cmd->device)) {
1527 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1528 status++;
1529 break;
1530 }
1531 }
1532 }
1533 return status;
1534 }
1535
1536 /**
1537 * qla4xxx_eh_device_reset - callback for target reset.
1538 * @cmd: Pointer to Linux's SCSI command structure
1539 *
1540 * This routine is called by the Linux OS to reset all luns on the
1541 * specified target.
1542 **/
1543 static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1544 {
1545 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1546 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1547 int ret = FAILED, stat;
1548
1549 if (!ddb_entry)
1550 return ret;
1551
1552 dev_info(&ha->pdev->dev,
1553 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1554 cmd->device->channel, cmd->device->id, cmd->device->lun);
1555
1556 DEBUG2(printk(KERN_INFO
1557 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1558 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1559 cmd, jiffies, cmd->request->timeout / HZ,
1560 ha->dpc_flags, cmd->result, cmd->allowed));
1561
1562 /* FIXME: wait for hba to go online */
1563 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1564 if (stat != QLA_SUCCESS) {
1565 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1566 goto eh_dev_reset_done;
1567 }
1568
1569 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
1570 cmd->device)) {
1571 dev_info(&ha->pdev->dev,
1572 "DEVICE RESET FAILED - waiting for "
1573 "commands.\n");
1574 goto eh_dev_reset_done;
1575 }
1576
1577 /* Send marker. */
1578 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
1579 MM_LUN_RESET) != QLA_SUCCESS)
1580 goto eh_dev_reset_done;
1581
1582 dev_info(&ha->pdev->dev,
1583 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1584 ha->host_no, cmd->device->channel, cmd->device->id,
1585 cmd->device->lun);
1586
1587 ret = SUCCESS;
1588
1589 eh_dev_reset_done:
1590
1591 return ret;
1592 }
1593
1594 /**
1595 * qla4xxx_eh_target_reset - callback for target reset.
1596 * @cmd: Pointer to Linux's SCSI command structure
1597 *
1598 * This routine is called by the Linux OS to reset the target.
1599 **/
1600 static int qla4xxx_eh_target_reset(struct scsi_cmnd *cmd)
1601 {
1602 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1603 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1604 int stat;
1605
1606 if (!ddb_entry)
1607 return FAILED;
1608
1609 starget_printk(KERN_INFO, scsi_target(cmd->device),
1610 "WARM TARGET RESET ISSUED.\n");
1611
1612 DEBUG2(printk(KERN_INFO
1613 "scsi%ld: TARGET_DEVICE_RESET cmd=%p jiffies = 0x%lx, "
1614 "to=%x,dpc_flags=%lx, status=%x allowed=%d\n",
1615 ha->host_no, cmd, jiffies, cmd->request->timeout / HZ,
1616 ha->dpc_flags, cmd->result, cmd->allowed));
1617
1618 stat = qla4xxx_reset_target(ha, ddb_entry);
1619 if (stat != QLA_SUCCESS) {
1620 starget_printk(KERN_INFO, scsi_target(cmd->device),
1621 "WARM TARGET RESET FAILED.\n");
1622 return FAILED;
1623 }
1624
1625 if (qla4xxx_eh_wait_for_commands(ha, scsi_target(cmd->device),
1626 NULL)) {
1627 starget_printk(KERN_INFO, scsi_target(cmd->device),
1628 "WARM TARGET DEVICE RESET FAILED - "
1629 "waiting for commands.\n");
1630 return FAILED;
1631 }
1632
1633 /* Send marker. */
1634 if (qla4xxx_send_marker_iocb(ha, ddb_entry, cmd->device->lun,
1635 MM_TGT_WARM_RESET) != QLA_SUCCESS) {
1636 starget_printk(KERN_INFO, scsi_target(cmd->device),
1637 "WARM TARGET DEVICE RESET FAILED - "
1638 "marker iocb failed.\n");
1639 return FAILED;
1640 }
1641
1642 starget_printk(KERN_INFO, scsi_target(cmd->device),
1643 "WARM TARGET RESET SUCCEEDED.\n");
1644 return SUCCESS;
1645 }
1646
1647 /**
1648 * qla4xxx_eh_host_reset - kernel callback
1649 * @cmd: Pointer to Linux's SCSI command structure
1650 *
1651 * This routine is invoked by the Linux kernel to perform fatal error
1652 * recovery on the specified adapter.
1653 **/
1654 static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1655 {
1656 int return_status = FAILED;
1657 struct scsi_qla_host *ha;
1658
1659 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1660
1661 dev_info(&ha->pdev->dev,
1662 "scsi(%ld:%d:%d:%d): HOST RESET ISSUED.\n", ha->host_no,
1663 cmd->device->channel, cmd->device->id, cmd->device->lun);
1664
1665 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1666 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1667 "DEAD.\n", ha->host_no, cmd->device->channel,
1668 __func__));
1669
1670 return FAILED;
1671 }
1672
1673 /* make sure the dpc thread is stopped while we reset the hba */
1674 clear_bit(AF_ONLINE, &ha->flags);
1675 flush_workqueue(ha->dpc_thread);
1676
1677 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS)
1678 return_status = SUCCESS;
1679
1680 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1681 return_status == FAILED ? "FAILED" : "SUCCEDED");
1682
1683 return return_status;
1684 }
1685
1686
1687 static struct pci_device_id qla4xxx_pci_tbl[] = {
1688 {
1689 .vendor = PCI_VENDOR_ID_QLOGIC,
1690 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1691 .subvendor = PCI_ANY_ID,
1692 .subdevice = PCI_ANY_ID,
1693 },
1694 {
1695 .vendor = PCI_VENDOR_ID_QLOGIC,
1696 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1697 .subvendor = PCI_ANY_ID,
1698 .subdevice = PCI_ANY_ID,
1699 },
1700 {
1701 .vendor = PCI_VENDOR_ID_QLOGIC,
1702 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1703 .subvendor = PCI_ANY_ID,
1704 .subdevice = PCI_ANY_ID,
1705 },
1706 {0, 0},
1707 };
1708 MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1709
1710 static struct pci_driver qla4xxx_pci_driver = {
1711 .name = DRIVER_NAME,
1712 .id_table = qla4xxx_pci_tbl,
1713 .probe = qla4xxx_probe_adapter,
1714 .remove = qla4xxx_remove_adapter,
1715 };
1716
1717 static int __init qla4xxx_module_init(void)
1718 {
1719 int ret;
1720
1721 /* Allocate cache for SRBs. */
1722 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
1723 SLAB_HWCACHE_ALIGN, NULL);
1724 if (srb_cachep == NULL) {
1725 printk(KERN_ERR
1726 "%s: Unable to allocate SRB cache..."
1727 "Failing load!\n", DRIVER_NAME);
1728 ret = -ENOMEM;
1729 goto no_srp_cache;
1730 }
1731
1732 /* Derive version string. */
1733 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
1734 if (ql4xextended_error_logging)
1735 strcat(qla4xxx_version_str, "-debug");
1736
1737 qla4xxx_scsi_transport =
1738 iscsi_register_transport(&qla4xxx_iscsi_transport);
1739 if (!qla4xxx_scsi_transport){
1740 ret = -ENODEV;
1741 goto release_srb_cache;
1742 }
1743
1744 ret = pci_register_driver(&qla4xxx_pci_driver);
1745 if (ret)
1746 goto unregister_transport;
1747
1748 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1749 return 0;
1750
1751 unregister_transport:
1752 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1753 release_srb_cache:
1754 kmem_cache_destroy(srb_cachep);
1755 no_srp_cache:
1756 return ret;
1757 }
1758
1759 static void __exit qla4xxx_module_exit(void)
1760 {
1761 ql4_mod_unload = 1;
1762 pci_unregister_driver(&qla4xxx_pci_driver);
1763 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1764 kmem_cache_destroy(srb_cachep);
1765 }
1766
1767 module_init(qla4xxx_module_init);
1768 module_exit(qla4xxx_module_exit);
1769
1770 MODULE_AUTHOR("QLogic Corporation");
1771 MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1772 MODULE_LICENSE("GPL");
1773 MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
Linux with added FPC-III support