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mm: Remove slab destructors from kmem_cache_create().
[linux-2.6-block.git] / drivers / scsi / qla4xxx / ql4_os.c
CommitLineData
afaf5a2d
DS		 1/*
2 * QLogic iSCSI HBA Driver
3 * Copyright (c) 2003-2006 QLogic Corporation
4 *
5 * See LICENSE.qla4xxx for copyright and licensing details.
6 */
7#include <linux/moduleparam.h>
8
9#include <scsi/scsi_tcq.h>
10#include <scsi/scsicam.h>
11
12#include "ql4_def.h"
bee4fe8e
DS		 13#include "ql4_version.h"
14#include "ql4_glbl.h"
15#include "ql4_dbg.h"
16#include "ql4_inline.h"
afaf5a2d
DS		 17
18/*
19 * Driver version
20 */
47975477 21static char qla4xxx_version_str[40];
afaf5a2d
DS		 22
23/*
24 * SRB allocation cache
25 */
e18b890b 26static struct kmem_cache *srb_cachep;
afaf5a2d
DS		 27
28/*
29 * Module parameter information and variables
30 */
31int ql4xdiscoverywait = 60;
32module_param(ql4xdiscoverywait, int, S_IRUGO | S_IRUSR);
33MODULE_PARM_DESC(ql4xdiscoverywait, "Discovery wait time");
34int ql4xdontresethba = 0;
35module_param(ql4xdontresethba, int, S_IRUGO | S_IRUSR);
36MODULE_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
11010fec
AV		 41int ql4xextended_error_logging = 0; /* 0 = off, 1 = log errors */
42module_param(ql4xextended_error_logging, int, S_IRUGO | S_IRUSR);
43MODULE_PARM_DESC(ql4xextended_error_logging,
afaf5a2d
DS		 44 "Option to enable extended error logging, "
45 "Default is 0 - no logging, 1 - debug logging");
46
477ffb9d
DS		 47int ql4_mod_unload = 0;
48
afaf5a2d
DS		 49/*
50 * SCSI host template entry points
51 */
47975477 52static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha);
afaf5a2d
DS		 53
54/*
55 * iSCSI template entry points
56 */
2174a04e
MC		 57static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
58 enum iscsi_tgt_dscvr type, uint32_t enable,
59 struct sockaddr *dst_addr);
afaf5a2d
DS		 60static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
61 enum iscsi_param param, char *buf);
62static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
63 enum iscsi_param param, char *buf);
aa1e93a2
MC		 64static int qla4xxx_host_get_param(struct Scsi_Host *shost,
65 enum iscsi_host_param param, char *buf);
afaf5a2d
DS		 66static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag);
67static int qla4xxx_conn_start(struct iscsi_cls_conn *conn);
68static void qla4xxx_recovery_timedout(struct iscsi_cls_session *session);
69
70/*
71 * SCSI host template entry points
72 */
73static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
74 void (*done) (struct scsi_cmnd *));
75static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd);
76static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd);
77static int qla4xxx_slave_alloc(struct scsi_device *device);
78static int qla4xxx_slave_configure(struct scsi_device *device);
79static void qla4xxx_slave_destroy(struct scsi_device *sdev);
80
81static struct scsi_host_template qla4xxx_driver_template = {
82 .module = THIS_MODULE,
83 .name = DRIVER_NAME,
84 .proc_name = DRIVER_NAME,
85 .queuecommand = qla4xxx_queuecommand,
86
87 .eh_device_reset_handler = qla4xxx_eh_device_reset,
88 .eh_host_reset_handler = qla4xxx_eh_host_reset,
89
90 .slave_configure = qla4xxx_slave_configure,
91 .slave_alloc = qla4xxx_slave_alloc,
92 .slave_destroy = qla4xxx_slave_destroy,
93
94 .this_id = -1,
95 .cmd_per_lun = 3,
96 .use_clustering = ENABLE_CLUSTERING,
97 .sg_tablesize = SG_ALL,
98
99 .max_sectors = 0xFFFF,
100};
101
102static struct iscsi_transport qla4xxx_iscsi_transport = {
103 .owner = THIS_MODULE,
104 .name = DRIVER_NAME,
d8196ed2
MC		 105 .caps = CAP_FW_DB | CAP_SENDTARGETS_OFFLOAD |
106 CAP_DATA_PATH_OFFLOAD,
aa1e93a2
MC		 107 .param_mask = ISCSI_CONN_PORT | ISCSI_CONN_ADDRESS |
108 ISCSI_TARGET_NAME | ISCSI_TPGT,
8ad5781a 109 .host_param_mask = ISCSI_HOST_HWADDRESS |
22236961 110 ISCSI_HOST_IPADDRESS |
8ad5781a 111 ISCSI_HOST_INITIATOR_NAME,
afaf5a2d
DS		 112 .sessiondata_size = sizeof(struct ddb_entry),
113 .host_template = &qla4xxx_driver_template,
114
115 .tgt_dscvr = qla4xxx_tgt_dscvr,
116 .get_conn_param = qla4xxx_conn_get_param,
117 .get_session_param = qla4xxx_sess_get_param,
aa1e93a2 118 .get_host_param = qla4xxx_host_get_param,
afaf5a2d
DS		 119 .start_conn = qla4xxx_conn_start,
120 .stop_conn = qla4xxx_conn_stop,
121 .session_recovery_timedout = qla4xxx_recovery_timedout,
122};
123
124static struct scsi_transport_template *qla4xxx_scsi_transport;
125
126static 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 DEBUG2(printk("scsi%ld: %s: index [%d] port down retry count of (%d) "
132 "secs exhausted, marking device DEAD.\n", ha->host_no,
133 __func__, ddb_entry->fw_ddb_index,
134 ha->port_down_retry_count));
135
136 atomic_set(&ddb_entry->state, DDB_STATE_DEAD);
137
138 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine - dpc flags = "
139 "0x%lx\n", ha->host_no, __func__, ha->dpc_flags));
140 queue_work(ha->dpc_thread, &ha->dpc_work);
141}
142
143static int qla4xxx_conn_start(struct iscsi_cls_conn *conn)
144{
145 struct iscsi_cls_session *session;
146 struct ddb_entry *ddb_entry;
147
148 session = iscsi_dev_to_session(conn->dev.parent);
149 ddb_entry = session->dd_data;
150
151 DEBUG2(printk("scsi%ld: %s: index [%d] starting conn\n",
152 ddb_entry->ha->host_no, __func__,
153 ddb_entry->fw_ddb_index));
154 iscsi_unblock_session(session);
155 return 0;
156}
157
158static void qla4xxx_conn_stop(struct iscsi_cls_conn *conn, int flag)
159{
160 struct iscsi_cls_session *session;
161 struct ddb_entry *ddb_entry;
162
163 session = iscsi_dev_to_session(conn->dev.parent);
164 ddb_entry = session->dd_data;
165
166 DEBUG2(printk("scsi%ld: %s: index [%d] stopping conn\n",
167 ddb_entry->ha->host_no, __func__,
168 ddb_entry->fw_ddb_index));
169 if (flag == STOP_CONN_RECOVER)
170 iscsi_block_session(session);
171 else
172 printk(KERN_ERR "iscsi: invalid stop flag %d\n", flag);
173}
174
aa1e93a2
MC		 175static ssize_t format_addr(char *buf, const unsigned char *addr, int len)
176{
177 int i;
178 char *cp = buf;
179
180 for (i = 0; i < len; i++)
181 cp += sprintf(cp, "%02x%c", addr[i],
182 i == (len - 1) ? '\n' : ':');
183 return cp - buf;
184}
185
186
187static int qla4xxx_host_get_param(struct Scsi_Host *shost,
188 enum iscsi_host_param param, char *buf)
189{
190 struct scsi_qla_host *ha = to_qla_host(shost);
191 int len;
192
193 switch (param) {
194 case ISCSI_HOST_PARAM_HWADDRESS:
195 len = format_addr(buf, ha->my_mac, MAC_ADDR_LEN);
8ad5781a 196 break;
22236961
MC		 197 case ISCSI_HOST_PARAM_IPADDRESS:
198 len = sprintf(buf, "%d.%d.%d.%d\n", ha->ip_address[0],
199 ha->ip_address[1], ha->ip_address[2],
200 ha->ip_address[3]);
201 break;
8ad5781a 202 case ISCSI_HOST_PARAM_INITIATOR_NAME:
22236961 203 len = sprintf(buf, "%s\n", ha->name_string);
aa1e93a2
MC		 204 break;
205 default:
206 return -ENOSYS;
207 }
208
209 return len;
210}
211
afaf5a2d
DS		 212static int qla4xxx_sess_get_param(struct iscsi_cls_session *sess,
213 enum iscsi_param param, char *buf)
214{
215 struct ddb_entry *ddb_entry = sess->dd_data;
216 int len;
217
218 switch (param) {
219 case ISCSI_PARAM_TARGET_NAME:
220 len = snprintf(buf, PAGE_SIZE - 1, "%s\n",
221 ddb_entry->iscsi_name);
222 break;
223 case ISCSI_PARAM_TPGT:
224 len = sprintf(buf, "%u\n", ddb_entry->tpgt);
225 break;
226 default:
227 return -ENOSYS;
228 }
229
230 return len;
231}
232
233static int qla4xxx_conn_get_param(struct iscsi_cls_conn *conn,
234 enum iscsi_param param, char *buf)
235{
236 struct iscsi_cls_session *session;
237 struct ddb_entry *ddb_entry;
238 int len;
239
240 session = iscsi_dev_to_session(conn->dev.parent);
241 ddb_entry = session->dd_data;
242
243 switch (param) {
244 case ISCSI_PARAM_CONN_PORT:
245 len = sprintf(buf, "%hu\n", ddb_entry->port);
246 break;
247 case ISCSI_PARAM_CONN_ADDRESS:
248 /* TODO: what are the ipv6 bits */
249 len = sprintf(buf, "%u.%u.%u.%u\n",
250 NIPQUAD(ddb_entry->ip_addr));
251 break;
252 default:
253 return -ENOSYS;
254 }
255
256 return len;
257}
258
2174a04e
MC		 259static int qla4xxx_tgt_dscvr(struct Scsi_Host *shost,
260 enum iscsi_tgt_dscvr type, uint32_t enable,
261 struct sockaddr *dst_addr)
afaf5a2d
DS		 262{
263 struct scsi_qla_host *ha;
afaf5a2d
DS		 264 struct sockaddr_in *addr;
265 struct sockaddr_in6 *addr6;
266 int ret = 0;
267
afaf5a2d
DS		 268 ha = (struct scsi_qla_host *) shost->hostdata;
269
270 switch (type) {
271 case ISCSI_TGT_DSCVR_SEND_TARGETS:
272 if (dst_addr->sa_family == AF_INET) {
273 addr = (struct sockaddr_in *)dst_addr;
274 if (qla4xxx_send_tgts(ha, (char *)&addr->sin_addr,
275 addr->sin_port) != QLA_SUCCESS)
276 ret = -EIO;
277 } else if (dst_addr->sa_family == AF_INET6) {
278 /*
279 * TODO: fix qla4xxx_send_tgts
280 */
281 addr6 = (struct sockaddr_in6 *)dst_addr;
282 if (qla4xxx_send_tgts(ha, (char *)&addr6->sin6_addr,
283 addr6->sin6_port) != QLA_SUCCESS)
284 ret = -EIO;
285 } else
286 ret = -ENOSYS;
287 break;
288 default:
289 ret = -ENOSYS;
290 }
afaf5a2d
DS		 291 return ret;
292}
293
294void qla4xxx_destroy_sess(struct ddb_entry *ddb_entry)
295{
296 if (!ddb_entry->sess)
297 return;
298
299 if (ddb_entry->conn) {
300 iscsi_if_destroy_session_done(ddb_entry->conn);
301 iscsi_destroy_conn(ddb_entry->conn);
302 iscsi_remove_session(ddb_entry->sess);
303 }
304 iscsi_free_session(ddb_entry->sess);
305}
306
307int qla4xxx_add_sess(struct ddb_entry *ddb_entry)
308{
309 int err;
310
311 err = iscsi_add_session(ddb_entry->sess, ddb_entry->fw_ddb_index);
312 if (err) {
313 DEBUG2(printk(KERN_ERR "Could not add session.\n"));
314 return err;
315 }
316
317 ddb_entry->conn = iscsi_create_conn(ddb_entry->sess, 0);
318 if (!ddb_entry->conn) {
319 iscsi_remove_session(ddb_entry->sess);
320 DEBUG2(printk(KERN_ERR "Could not add connection.\n"));
321 return -ENOMEM;
322 }
323
324 ddb_entry->sess->recovery_tmo = ddb_entry->ha->port_down_retry_count;
325 iscsi_if_create_session_done(ddb_entry->conn);
326 return 0;
327}
328
329struct ddb_entry *qla4xxx_alloc_sess(struct scsi_qla_host *ha)
330{
331 struct ddb_entry *ddb_entry;
332 struct iscsi_cls_session *sess;
333
334 sess = iscsi_alloc_session(ha->host, &qla4xxx_iscsi_transport);
335 if (!sess)
336 return NULL;
337
338 ddb_entry = sess->dd_data;
339 memset(ddb_entry, 0, sizeof(*ddb_entry));
340 ddb_entry->ha = ha;
341 ddb_entry->sess = sess;
342 return ddb_entry;
343}
344
345/*
346 * Timer routines
347 */
348
349static void qla4xxx_start_timer(struct scsi_qla_host *ha, void *func,
350 unsigned long interval)
351{
352 DEBUG(printk("scsi: %s: Starting timer thread for adapter %d\n",
353 __func__, ha->host->host_no));
354 init_timer(&ha->timer);
355 ha->timer.expires = jiffies + interval * HZ;
356 ha->timer.data = (unsigned long)ha;
357 ha->timer.function = (void (*)(unsigned long))func;
358 add_timer(&ha->timer);
359 ha->timer_active = 1;
360}
361
362static void qla4xxx_stop_timer(struct scsi_qla_host *ha)
363{
364 del_timer_sync(&ha->timer);
365 ha->timer_active = 0;
366}
367
368/***
369 * qla4xxx_mark_device_missing - mark a device as missing.
370 * @ha: Pointer to host adapter structure.
371 * @ddb_entry: Pointer to device database entry
372 *
373 * This routine marks a device missing and resets the relogin retry count.
374 **/
375void qla4xxx_mark_device_missing(struct scsi_qla_host *ha,
376 struct ddb_entry *ddb_entry)
377{
378 atomic_set(&ddb_entry->state, DDB_STATE_MISSING);
379 DEBUG3(printk("scsi%d:%d:%d: index [%d] marked MISSING\n",
380 ha->host_no, ddb_entry->bus, ddb_entry->target,
381 ddb_entry->fw_ddb_index));
382 iscsi_conn_error(ddb_entry->conn, ISCSI_ERR_CONN_FAILED);
383}
384
385static struct srb* qla4xxx_get_new_srb(struct scsi_qla_host *ha,
386 struct ddb_entry *ddb_entry,
387 struct scsi_cmnd *cmd,
388 void (*done)(struct scsi_cmnd *))
389{
390 struct srb *srb;
391
392 srb = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
393 if (!srb)
394 return srb;
395
396 atomic_set(&srb->ref_count, 1);
397 srb->ha = ha;
398 srb->ddb = ddb_entry;
399 srb->cmd = cmd;
400 srb->flags = 0;
401 cmd->SCp.ptr = (void *)srb;
402 cmd->scsi_done = done;
403
404 return srb;
405}
406
407static void qla4xxx_srb_free_dma(struct scsi_qla_host *ha, struct srb *srb)
408{
409 struct scsi_cmnd *cmd = srb->cmd;
410
411 if (srb->flags & SRB_DMA_VALID) {
5f7186c8 412 scsi_dma_unmap(cmd);
afaf5a2d
DS		 413 srb->flags &= ~SRB_DMA_VALID;
414 }
415 cmd->SCp.ptr = NULL;
416}
417
418void qla4xxx_srb_compl(struct scsi_qla_host *ha, struct srb *srb)
419{
420 struct scsi_cmnd *cmd = srb->cmd;
421
422 qla4xxx_srb_free_dma(ha, srb);
423
424 mempool_free(srb, ha->srb_mempool);
425
426 cmd->scsi_done(cmd);
427}
428
429/**
430 * qla4xxx_queuecommand - scsi layer issues scsi command to driver.
431 * @cmd: Pointer to Linux's SCSI command structure
432 * @done_fn: Function that the driver calls to notify the SCSI mid-layer
433 * that the command has been processed.
434 *
435 * Remarks:
436 * This routine is invoked by Linux to send a SCSI command to the driver.
437 * The mid-level driver tries to ensure that queuecommand never gets
438 * invoked concurrently with itself or the interrupt handler (although
439 * the interrupt handler may call this routine as part of request-
440 * completion handling). Unfortunely, it sometimes calls the scheduler
441 * in interrupt context which is a big NO! NO!.
442 **/
443static int qla4xxx_queuecommand(struct scsi_cmnd *cmd,
444 void (*done)(struct scsi_cmnd *))
445{
446 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
447 struct ddb_entry *ddb_entry = cmd->device->hostdata;
448 struct srb *srb;
449 int rval;
450
451 if (atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
452 if (atomic_read(&ddb_entry->state) == DDB_STATE_DEAD) {
453 cmd->result = DID_NO_CONNECT << 16;
454 goto qc_fail_command;
455 }
456 goto qc_host_busy;
457 }
458
477ffb9d
DS		 459 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
460 goto qc_host_busy;
461
afaf5a2d
DS		 462 spin_unlock_irq(ha->host->host_lock);
463
464 srb = qla4xxx_get_new_srb(ha, ddb_entry, cmd, done);
465 if (!srb)
466 goto qc_host_busy_lock;
467
468 rval = qla4xxx_send_command_to_isp(ha, srb);
469 if (rval != QLA_SUCCESS)
470 goto qc_host_busy_free_sp;
471
472 spin_lock_irq(ha->host->host_lock);
473 return 0;
474
475qc_host_busy_free_sp:
476 qla4xxx_srb_free_dma(ha, srb);
477 mempool_free(srb, ha->srb_mempool);
478
479qc_host_busy_lock:
480 spin_lock_irq(ha->host->host_lock);
481
482qc_host_busy:
483 return SCSI_MLQUEUE_HOST_BUSY;
484
485qc_fail_command:
486 done(cmd);
487
488 return 0;
489}
490
491/**
492 * qla4xxx_mem_free - frees memory allocated to adapter
493 * @ha: Pointer to host adapter structure.
494 *
495 * Frees memory previously allocated by qla4xxx_mem_alloc
496 **/
497static void qla4xxx_mem_free(struct scsi_qla_host *ha)
498{
499 if (ha->queues)
500 dma_free_coherent(&ha->pdev->dev, ha->queues_len, ha->queues,
501 ha->queues_dma);
502
503 ha->queues_len = 0;
504 ha->queues = NULL;
505 ha->queues_dma = 0;
506 ha->request_ring = NULL;
507 ha->request_dma = 0;
508 ha->response_ring = NULL;
509 ha->response_dma = 0;
510 ha->shadow_regs = NULL;
511 ha->shadow_regs_dma = 0;
512
513 /* Free srb pool. */
514 if (ha->srb_mempool)
515 mempool_destroy(ha->srb_mempool);
516
517 ha->srb_mempool = NULL;
518
519 /* release io space registers */
520 if (ha->reg)
521 iounmap(ha->reg);
522 pci_release_regions(ha->pdev);
523}
524
525/**
526 * qla4xxx_mem_alloc - allocates memory for use by adapter.
527 * @ha: Pointer to host adapter structure
528 *
529 * Allocates DMA memory for request and response queues. Also allocates memory
530 * for srbs.
531 **/
532static int qla4xxx_mem_alloc(struct scsi_qla_host *ha)
533{
534 unsigned long align;
535
536 /* Allocate contiguous block of DMA memory for queues. */
537 ha->queues_len = ((REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
538 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE) +
539 sizeof(struct shadow_regs) +
540 MEM_ALIGN_VALUE +
541 (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);
542 ha->queues = dma_alloc_coherent(&ha->pdev->dev, ha->queues_len,
543 &ha->queues_dma, GFP_KERNEL);
544 if (ha->queues == NULL) {
545 dev_warn(&ha->pdev->dev,
546 "Memory Allocation failed - queues.\n");
547
548 goto mem_alloc_error_exit;
549 }
550 memset(ha->queues, 0, ha->queues_len);
551
552 /*
553 * As per RISC alignment requirements -- the bus-address must be a
554 * multiple of the request-ring size (in bytes).
555 */
556 align = 0;
557 if ((unsigned long)ha->queues_dma & (MEM_ALIGN_VALUE - 1))
558 align = MEM_ALIGN_VALUE - ((unsigned long)ha->queues_dma &
559 (MEM_ALIGN_VALUE - 1));
560
561 /* Update request and response queue pointers. */
562 ha->request_dma = ha->queues_dma + align;
563 ha->request_ring = (struct queue_entry *) (ha->queues + align);
564 ha->response_dma = ha->queues_dma + align +
565 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE);
566 ha->response_ring = (struct queue_entry *) (ha->queues + align +
567 (REQUEST_QUEUE_DEPTH *
568 QUEUE_SIZE));
569 ha->shadow_regs_dma = ha->queues_dma + align +
570 (REQUEST_QUEUE_DEPTH * QUEUE_SIZE) +
571 (RESPONSE_QUEUE_DEPTH * QUEUE_SIZE);
572 ha->shadow_regs = (struct shadow_regs *) (ha->queues + align +
573 (REQUEST_QUEUE_DEPTH *
574 QUEUE_SIZE) +
575 (RESPONSE_QUEUE_DEPTH *
576 QUEUE_SIZE));
577
578 /* Allocate memory for srb pool. */
579 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
580 mempool_free_slab, srb_cachep);
581 if (ha->srb_mempool == NULL) {
582 dev_warn(&ha->pdev->dev,
583 "Memory Allocation failed - SRB Pool.\n");
584
585 goto mem_alloc_error_exit;
586 }
587
588 return QLA_SUCCESS;
589
590mem_alloc_error_exit:
591 qla4xxx_mem_free(ha);
592 return QLA_ERROR;
593}
594
595/**
596 * qla4xxx_timer - checks every second for work to do.
597 * @ha: Pointer to host adapter structure.
598 **/
599static void qla4xxx_timer(struct scsi_qla_host *ha)
600{
601 struct ddb_entry *ddb_entry, *dtemp;
602 int start_dpc = 0;
603
604 /* Search for relogin's to time-out and port down retry. */
605 list_for_each_entry_safe(ddb_entry, dtemp, &ha->ddb_list, list) {
606 /* Count down time between sending relogins */
607 if (adapter_up(ha) &&
608 !test_bit(DF_RELOGIN, &ddb_entry->flags) &&
609 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE) {
610 if (atomic_read(&ddb_entry->retry_relogin_timer) !=
611 INVALID_ENTRY) {
612 if (atomic_read(&ddb_entry->retry_relogin_timer)
613 == 0) {
614 atomic_set(&ddb_entry->
615 retry_relogin_timer,
616 INVALID_ENTRY);
617 set_bit(DPC_RELOGIN_DEVICE,
618 &ha->dpc_flags);
619 set_bit(DF_RELOGIN, &ddb_entry->flags);
620 DEBUG2(printk("scsi%ld: %s: index [%d]"
621 " login device\n",
622 ha->host_no, __func__,
623 ddb_entry->fw_ddb_index));
624 } else
625 atomic_dec(&ddb_entry->
626 retry_relogin_timer);
627 }
628 }
629
630 /* Wait for relogin to timeout */
631 if (atomic_read(&ddb_entry->relogin_timer) &&
632 (atomic_dec_and_test(&ddb_entry->relogin_timer) != 0)) {
633 /*
634 * If the relogin times out and the device is
635 * still NOT ONLINE then try and relogin again.
636 */
637 if (atomic_read(&ddb_entry->state) !=
638 DDB_STATE_ONLINE &&
639 ddb_entry->fw_ddb_device_state ==
640 DDB_DS_SESSION_FAILED) {
641 /* Reset retry relogin timer */
642 atomic_inc(&ddb_entry->relogin_retry_count);
643 DEBUG2(printk("scsi%ld: index[%d] relogin"
644 " timed out-retrying"
645 " relogin (%d)\n",
646 ha->host_no,
647 ddb_entry->fw_ddb_index,
648 atomic_read(&ddb_entry->
649 relogin_retry_count))
650 );
651 start_dpc++;
652 DEBUG(printk("scsi%ld:%d:%d: index [%d] "
653 "initate relogin after"
654 " %d seconds\n",
655 ha->host_no, ddb_entry->bus,
656 ddb_entry->target,
657 ddb_entry->fw_ddb_index,
658 ddb_entry->default_time2wait + 4)
659 );
660
661 atomic_set(&ddb_entry->retry_relogin_timer,
662 ddb_entry->default_time2wait + 4);
663 }
664 }
665 }
666
667 /* Check for heartbeat interval. */
668 if (ha->firmware_options & FWOPT_HEARTBEAT_ENABLE &&
669 ha->heartbeat_interval != 0) {
670 ha->seconds_since_last_heartbeat++;
671 if (ha->seconds_since_last_heartbeat >
672 ha->heartbeat_interval + 2)
673 set_bit(DPC_RESET_HA, &ha->dpc_flags);
674 }
675
676
677 /* Wakeup the dpc routine for this adapter, if needed. */
678 if ((start_dpc ||
679 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
680 test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags) ||
681 test_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags) ||
682 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
683 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
684 test_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags) ||
685 test_bit(DPC_AEN, &ha->dpc_flags)) &&
686 ha->dpc_thread) {
687 DEBUG2(printk("scsi%ld: %s: scheduling dpc routine"
688 " - dpc flags = 0x%lx\n",
689 ha->host_no, __func__, ha->dpc_flags));
690 queue_work(ha->dpc_thread, &ha->dpc_work);
691 }
692
693 /* Reschedule timer thread to call us back in one second */
694 mod_timer(&ha->timer, jiffies + HZ);
695
696 DEBUG2(ha->seconds_since_last_intr++);
697}
698
699/**
700 * qla4xxx_cmd_wait - waits for all outstanding commands to complete
701 * @ha: Pointer to host adapter structure.
702 *
703 * This routine stalls the driver until all outstanding commands are returned.
704 * Caller must release the Hardware Lock prior to calling this routine.
705 **/
706static int qla4xxx_cmd_wait(struct scsi_qla_host *ha)
707{
708 uint32_t index = 0;
709 int stat = QLA_SUCCESS;
710 unsigned long flags;
711 struct scsi_cmnd *cmd;
712 int wait_cnt = WAIT_CMD_TOV; /*
713 * Initialized for 30 seconds as we
714 * expect all commands to retuned
715 * ASAP.
716 */
717
718 while (wait_cnt) {
719 spin_lock_irqsave(&ha->hardware_lock, flags);
720 /* Find a command that hasn't completed. */
721 for (index = 0; index < ha->host->can_queue; index++) {
722 cmd = scsi_host_find_tag(ha->host, index);
723 if (cmd != NULL)
724 break;
725 }
726 spin_unlock_irqrestore(&ha->hardware_lock, flags);
727
728 /* If No Commands are pending, wait is complete */
729 if (index == ha->host->can_queue) {
730 break;
731 }
732
733 /* If we timed out on waiting for commands to come back
734 * return ERROR.
735 */
736 wait_cnt--;
737 if (wait_cnt == 0)
738 stat = QLA_ERROR;
739 else {
740 msleep(1000);
741 }
742 } /* End of While (wait_cnt) */
743
744 return stat;
745}
746
bee4fe8e 747void qla4xxx_hw_reset(struct scsi_qla_host *ha)
afaf5a2d 748{
afaf5a2d 749 uint32_t ctrl_status;
477ffb9d
DS		 750 unsigned long flags = 0;
751
752 DEBUG2(printk(KERN_ERR "scsi%ld: %s\n", ha->host_no, __func__));
afaf5a2d
DS		 753
754 spin_lock_irqsave(&ha->hardware_lock, flags);
755
756 /*
757 * If the SCSI Reset Interrupt bit is set, clear it.
758 * Otherwise, the Soft Reset won't work.
759 */
760 ctrl_status = readw(&ha->reg->ctrl_status);
761 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0)
762 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
763
764 /* Issue Soft Reset */
765 writel(set_rmask(CSR_SOFT_RESET), &ha->reg->ctrl_status);
766 readl(&ha->reg->ctrl_status);
767
768 spin_unlock_irqrestore(&ha->hardware_lock, flags);
477ffb9d
DS		 769}
770
771/**
772 * qla4xxx_soft_reset - performs soft reset.
773 * @ha: Pointer to host adapter structure.
774 **/
775int qla4xxx_soft_reset(struct scsi_qla_host *ha)
776{
777 uint32_t max_wait_time;
778 unsigned long flags = 0;
779 int status = QLA_ERROR;
780 uint32_t ctrl_status;
781
782 qla4xxx_hw_reset(ha);
afaf5a2d
DS		 783
784 /* Wait until the Network Reset Intr bit is cleared */
785 max_wait_time = RESET_INTR_TOV;
786 do {
787 spin_lock_irqsave(&ha->hardware_lock, flags);
788 ctrl_status = readw(&ha->reg->ctrl_status);
789 spin_unlock_irqrestore(&ha->hardware_lock, flags);
790
791 if ((ctrl_status & CSR_NET_RESET_INTR) == 0)
792 break;
793
794 msleep(1000);
795 } while ((--max_wait_time));
796
797 if ((ctrl_status & CSR_NET_RESET_INTR) != 0) {
798 DEBUG2(printk(KERN_WARNING
799 "scsi%ld: Network Reset Intr not cleared by "
800 "Network function, clearing it now!\n",
801 ha->host_no));
802 spin_lock_irqsave(&ha->hardware_lock, flags);
803 writel(set_rmask(CSR_NET_RESET_INTR), &ha->reg->ctrl_status);
804 readl(&ha->reg->ctrl_status);
805 spin_unlock_irqrestore(&ha->hardware_lock, flags);
806 }
807
808 /* Wait until the firmware tells us the Soft Reset is done */
809 max_wait_time = SOFT_RESET_TOV;
810 do {
811 spin_lock_irqsave(&ha->hardware_lock, flags);
812 ctrl_status = readw(&ha->reg->ctrl_status);
813 spin_unlock_irqrestore(&ha->hardware_lock, flags);
814
815 if ((ctrl_status & CSR_SOFT_RESET) == 0) {
816 status = QLA_SUCCESS;
817 break;
818 }
819
820 msleep(1000);
821 } while ((--max_wait_time));
822
823 /*
824 * Also, make sure that the SCSI Reset Interrupt bit has been cleared
825 * after the soft reset has taken place.
826 */
827 spin_lock_irqsave(&ha->hardware_lock, flags);
828 ctrl_status = readw(&ha->reg->ctrl_status);
829 if ((ctrl_status & CSR_SCSI_RESET_INTR) != 0) {
830 writel(set_rmask(CSR_SCSI_RESET_INTR), &ha->reg->ctrl_status);
831 readl(&ha->reg->ctrl_status);
832 }
833 spin_unlock_irqrestore(&ha->hardware_lock, flags);
834
835 /* If soft reset fails then most probably the bios on other
836 * function is also enabled.
837 * Since the initialization is sequential the other fn
838 * wont be able to acknowledge the soft reset.
839 * Issue a force soft reset to workaround this scenario.
840 */
841 if (max_wait_time == 0) {
842 /* Issue Force Soft Reset */
843 spin_lock_irqsave(&ha->hardware_lock, flags);
844 writel(set_rmask(CSR_FORCE_SOFT_RESET), &ha->reg->ctrl_status);
845 readl(&ha->reg->ctrl_status);
846 spin_unlock_irqrestore(&ha->hardware_lock, flags);
847 /* Wait until the firmware tells us the Soft Reset is done */
848 max_wait_time = SOFT_RESET_TOV;
849 do {
850 spin_lock_irqsave(&ha->hardware_lock, flags);
851 ctrl_status = readw(&ha->reg->ctrl_status);
852 spin_unlock_irqrestore(&ha->hardware_lock, flags);
853
854 if ((ctrl_status & CSR_FORCE_SOFT_RESET) == 0) {
855 status = QLA_SUCCESS;
856 break;
857 }
858
859 msleep(1000);
860 } while ((--max_wait_time));
861 }
862
863 return status;
864}
865
afaf5a2d
DS		 866/**
867 * qla4xxx_flush_active_srbs - returns all outstanding i/o requests to O.S.
868 * @ha: Pointer to host adapter structure.
869 *
870 * This routine is called just prior to a HARD RESET to return all
871 * outstanding commands back to the Operating System.
872 * Caller should make sure that the following locks are released
873 * before this calling routine: Hardware lock, and io_request_lock.
874 **/
875static void qla4xxx_flush_active_srbs(struct scsi_qla_host *ha)
876{
877 struct srb *srb;
878 int i;
879 unsigned long flags;
880
881 spin_lock_irqsave(&ha->hardware_lock, flags);
882 for (i = 0; i < ha->host->can_queue; i++) {
883 srb = qla4xxx_del_from_active_array(ha, i);
884 if (srb != NULL) {
885 srb->cmd->result = DID_RESET << 16;
886 qla4xxx_srb_compl(ha, srb);
887 }
888 }
889 spin_unlock_irqrestore(&ha->hardware_lock, flags);
890
891}
892
afaf5a2d
DS		 893/**
894 * qla4xxx_recover_adapter - recovers adapter after a fatal error
895 * @ha: Pointer to host adapter structure.
896 * @renew_ddb_list: Indicates what to do with the adapter's ddb list
897 * after adapter recovery has completed.
898 * 0=preserve ddb list, 1=destroy and rebuild ddb list
899 **/
900static int qla4xxx_recover_adapter(struct scsi_qla_host *ha,
901 uint8_t renew_ddb_list)
902{
903 int status;
904
905 /* Stall incoming I/O until we are done */
906 clear_bit(AF_ONLINE, &ha->flags);
907 DEBUG2(printk("scsi%ld: %s calling qla4xxx_cmd_wait\n", ha->host_no,
908 __func__));
909
910 /* Wait for outstanding commands to complete.
911 * Stalls the driver for max 30 secs
912 */
913 status = qla4xxx_cmd_wait(ha);
914
915 qla4xxx_disable_intrs(ha);
916
917 /* Flush any pending ddb changed AENs */
918 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
919
920 /* Reset the firmware. If successful, function
921 * returns with ISP interrupts enabled.
922 */
923 if (status == QLA_SUCCESS) {
924 DEBUG2(printk("scsi%ld: %s - Performing soft reset..\n",
925 ha->host_no, __func__));
f26b9044
DS		 926 qla4xxx_flush_active_srbs(ha);
927 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
928 status = qla4xxx_soft_reset(ha);
929 else
930 status = QLA_ERROR;
afaf5a2d
DS		 931 }
932
933 /* Flush any pending ddb changed AENs */
934 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
935
936 /* Re-initialize firmware. If successful, function returns
937 * with ISP interrupts enabled */
938 if (status == QLA_SUCCESS) {
939 DEBUG2(printk("scsi%ld: %s - Initializing adapter..\n",
940 ha->host_no, __func__));
941
942 /* If successful, AF_ONLINE flag set in
943 * qla4xxx_initialize_adapter */
944 status = qla4xxx_initialize_adapter(ha, renew_ddb_list);
945 }
946
947 /* Failed adapter initialization?
948 * Retry reset_ha only if invoked via DPC (DPC_RESET_HA) */
949 if ((test_bit(AF_ONLINE, &ha->flags) == 0) &&
950 (test_bit(DPC_RESET_HA, &ha->dpc_flags))) {
951 /* Adapter initialization failed, see if we can retry
952 * resetting the ha */
953 if (!test_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags)) {
954 ha->retry_reset_ha_cnt = MAX_RESET_HA_RETRIES;
955 DEBUG2(printk("scsi%ld: recover adapter - retrying "
956 "(%d) more times\n", ha->host_no,
957 ha->retry_reset_ha_cnt));
958 set_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
959 status = QLA_ERROR;
960 } else {
961 if (ha->retry_reset_ha_cnt > 0) {
962 /* Schedule another Reset HA--DPC will retry */
963 ha->retry_reset_ha_cnt--;
964 DEBUG2(printk("scsi%ld: recover adapter - "
965 "retry remaining %d\n",
966 ha->host_no,
967 ha->retry_reset_ha_cnt));
968 status = QLA_ERROR;
969 }
970
971 if (ha->retry_reset_ha_cnt == 0) {
972 /* Recover adapter retries have been exhausted.
973 * Adapter DEAD */
974 DEBUG2(printk("scsi%ld: recover adapter "
975 "failed - board disabled\n",
976 ha->host_no));
977 qla4xxx_flush_active_srbs(ha);
978 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
979 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
980 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST,
981 &ha->dpc_flags);
982 status = QLA_ERROR;
983 }
984 }
985 } else {
986 clear_bit(DPC_RESET_HA, &ha->dpc_flags);
987 clear_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags);
988 clear_bit(DPC_RETRY_RESET_HA, &ha->dpc_flags);
989 }
990
991 ha->adapter_error_count++;
992
993 if (status == QLA_SUCCESS)
994 qla4xxx_enable_intrs(ha);
995
996 DEBUG2(printk("scsi%ld: recover adapter .. DONE\n", ha->host_no));
997 return status;
998}
999
1000/**
1001 * qla4xxx_do_dpc - dpc routine
1002 * @data: in our case pointer to adapter structure
1003 *
1004 * This routine is a task that is schedule by the interrupt handler
1005 * to perform the background processing for interrupts. We put it
1006 * on a task queue that is consumed whenever the scheduler runs; that's
1007 * so you can do anything (i.e. put the process to sleep etc). In fact,
1008 * the mid-level tries to sleep when it reaches the driver threshold
1009 * "host->can_queue". This can cause a panic if we were in our interrupt code.
1010 **/
c4028958 1011static void qla4xxx_do_dpc(struct work_struct *work)
afaf5a2d 1012{
c4028958
DH		 1013 struct scsi_qla_host *ha =
1014 container_of(work, struct scsi_qla_host, dpc_work);
afaf5a2d 1015 struct ddb_entry *ddb_entry, *dtemp;
477ffb9d 1016 int status = QLA_ERROR;
afaf5a2d 1017
f26b9044 1018 DEBUG2(printk("scsi%ld: %s: DPC handler waking up."
477ffb9d
DS		 1019 "flags = 0x%08lx, dpc_flags = 0x%08lx ctrl_stat = 0x%08x\n",
1020 ha->host_no, __func__, ha->flags, ha->dpc_flags,
1021 readw(&ha->reg->ctrl_status)));
afaf5a2d
DS		 1022
1023 /* Initialization not yet finished. Don't do anything yet. */
1024 if (!test_bit(AF_INIT_DONE, &ha->flags))
1025 return;
1026
1027 if (adapter_up(ha) ||
1028 test_bit(DPC_RESET_HA, &ha->dpc_flags) ||
1029 test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags) ||
1030 test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags)) {
f26b9044
DS		 1031 if (test_bit(DPC_RESET_HA_DESTROY_DDB_LIST, &ha->dpc_flags) ||
1032 test_bit(DPC_RESET_HA, &ha->dpc_flags))
afaf5a2d
DS		 1033 qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST);
1034
477ffb9d 1035 if (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags)) {
afaf5a2d 1036 uint8_t wait_time = RESET_INTR_TOV;
afaf5a2d 1037
afaf5a2d
DS		 1038 while ((readw(&ha->reg->ctrl_status) &
1039 (CSR_SOFT_RESET | CSR_FORCE_SOFT_RESET)) != 0) {
1040 if (--wait_time == 0)
1041 break;
afaf5a2d 1042 msleep(1000);
afaf5a2d 1043 }
afaf5a2d
DS		 1044 if (wait_time == 0)
1045 DEBUG2(printk("scsi%ld: %s: SR|FSR "
1046 "bit not cleared-- resetting\n",
1047 ha->host_no, __func__));
477ffb9d
DS		 1048 qla4xxx_flush_active_srbs(ha);
1049 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS) {
1050 qla4xxx_process_aen(ha, FLUSH_DDB_CHANGED_AENS);
1051 status = qla4xxx_initialize_adapter(ha,
1052 PRESERVE_DDB_LIST);
1053 }
1054 clear_bit(DPC_RESET_HA_INTR, &ha->dpc_flags);
1055 if (status == QLA_SUCCESS)
1056 qla4xxx_enable_intrs(ha);
afaf5a2d
DS		 1057 }
1058 }
1059
1060 /* ---- process AEN? --- */
1061 if (test_and_clear_bit(DPC_AEN, &ha->dpc_flags))
1062 qla4xxx_process_aen(ha, PROCESS_ALL_AENS);
1063
1064 /* ---- Get DHCP IP Address? --- */
1065 if (test_and_clear_bit(DPC_GET_DHCP_IP_ADDR, &ha->dpc_flags))
1066 qla4xxx_get_dhcp_ip_address(ha);
1067
1068 /* ---- relogin device? --- */
1069 if (adapter_up(ha) &&
1070 test_and_clear_bit(DPC_RELOGIN_DEVICE, &ha->dpc_flags)) {
1071 list_for_each_entry_safe(ddb_entry, dtemp,
1072 &ha->ddb_list, list) {
1073 if (test_and_clear_bit(DF_RELOGIN, &ddb_entry->flags) &&
1074 atomic_read(&ddb_entry->state) != DDB_STATE_ONLINE)
1075 qla4xxx_relogin_device(ha, ddb_entry);
1076
1077 /*
1078 * If mbx cmd times out there is no point
1079 * in continuing further.
1080 * With large no of targets this can hang
1081 * the system.
1082 */
1083 if (test_bit(DPC_RESET_HA, &ha->dpc_flags)) {
1084 printk(KERN_WARNING "scsi%ld: %s: "
1085 "need to reset hba\n",
1086 ha->host_no, __func__);
1087 break;
1088 }
1089 }
1090 }
1091}
1092
1093/**
1094 * qla4xxx_free_adapter - release the adapter
1095 * @ha: pointer to adapter structure
1096 **/
1097static void qla4xxx_free_adapter(struct scsi_qla_host *ha)
1098{
1099
1100 if (test_bit(AF_INTERRUPTS_ON, &ha->flags)) {
1101 /* Turn-off interrupts on the card. */
1102 qla4xxx_disable_intrs(ha);
1103 }
1104
1105 /* Kill the kernel thread for this host */
1106 if (ha->dpc_thread)
1107 destroy_workqueue(ha->dpc_thread);
1108
1109 /* Issue Soft Reset to put firmware in unknown state */
f26b9044 1110 if (ql4xxx_lock_drvr_wait(ha) == QLA_SUCCESS)
477ffb9d 1111 qla4xxx_hw_reset(ha);
afaf5a2d
DS		 1112
1113 /* Remove timer thread, if present */
1114 if (ha->timer_active)
1115 qla4xxx_stop_timer(ha);
1116
afaf5a2d
DS		 1117 /* Detach interrupts */
1118 if (test_and_clear_bit(AF_IRQ_ATTACHED, &ha->flags))
1119 free_irq(ha->pdev->irq, ha);
1120
bee4fe8e
DS		 1121 /* free extra memory */
1122 qla4xxx_mem_free(ha);
1123
afaf5a2d
DS		 1124 pci_disable_device(ha->pdev);
1125
1126}
1127
1128/***
1129 * qla4xxx_iospace_config - maps registers
1130 * @ha: pointer to adapter structure
1131 *
1132 * This routines maps HBA's registers from the pci address space
1133 * into the kernel virtual address space for memory mapped i/o.
1134 **/
1135static int qla4xxx_iospace_config(struct scsi_qla_host *ha)
1136{
1137 unsigned long pio, pio_len, pio_flags;
1138 unsigned long mmio, mmio_len, mmio_flags;
1139
1140 pio = pci_resource_start(ha->pdev, 0);
1141 pio_len = pci_resource_len(ha->pdev, 0);
1142 pio_flags = pci_resource_flags(ha->pdev, 0);
1143 if (pio_flags & IORESOURCE_IO) {
1144 if (pio_len < MIN_IOBASE_LEN) {
1145 dev_warn(&ha->pdev->dev,
1146 "Invalid PCI I/O region size\n");
1147 pio = 0;
1148 }
1149 } else {
1150 dev_warn(&ha->pdev->dev, "region #0 not a PIO resource\n");
1151 pio = 0;
1152 }
1153
1154 /* Use MMIO operations for all accesses. */
1155 mmio = pci_resource_start(ha->pdev, 1);
1156 mmio_len = pci_resource_len(ha->pdev, 1);
1157 mmio_flags = pci_resource_flags(ha->pdev, 1);
1158
1159 if (!(mmio_flags & IORESOURCE_MEM)) {
1160 dev_err(&ha->pdev->dev,
1161 "region #0 not an MMIO resource, aborting\n");
1162
1163 goto iospace_error_exit;
1164 }
1165 if (mmio_len < MIN_IOBASE_LEN) {
1166 dev_err(&ha->pdev->dev,
1167 "Invalid PCI mem region size, aborting\n");
1168 goto iospace_error_exit;
1169 }
1170
1171 if (pci_request_regions(ha->pdev, DRIVER_NAME)) {
1172 dev_warn(&ha->pdev->dev,
1173 "Failed to reserve PIO/MMIO regions\n");
1174
1175 goto iospace_error_exit;
1176 }
1177
1178 ha->pio_address = pio;
1179 ha->pio_length = pio_len;
1180 ha->reg = ioremap(mmio, MIN_IOBASE_LEN);
1181 if (!ha->reg) {
1182 dev_err(&ha->pdev->dev,
1183 "cannot remap MMIO, aborting\n");
1184
1185 goto iospace_error_exit;
1186 }
1187
1188 return 0;
1189
1190iospace_error_exit:
1191 return -ENOMEM;
1192}
1193
1194/**
1195 * qla4xxx_probe_adapter - callback function to probe HBA
1196 * @pdev: pointer to pci_dev structure
1197 * @pci_device_id: pointer to pci_device entry
1198 *
1199 * This routine will probe for Qlogic 4xxx iSCSI host adapters.
1200 * It returns zero if successful. It also initializes all data necessary for
1201 * the driver.
1202 **/
1203static int __devinit qla4xxx_probe_adapter(struct pci_dev *pdev,
1204 const struct pci_device_id *ent)
1205{
1206 int ret = -ENODEV, status;
1207 struct Scsi_Host *host;
1208 struct scsi_qla_host *ha;
1209 struct ddb_entry *ddb_entry, *ddbtemp;
1210 uint8_t init_retry_count = 0;
1211 char buf[34];
1212
1213 if (pci_enable_device(pdev))
1214 return -1;
1215
1216 host = scsi_host_alloc(&qla4xxx_driver_template, sizeof(*ha));
1217 if (host == NULL) {
1218 printk(KERN_WARNING
1219 "qla4xxx: Couldn't allocate host from scsi layer!\n");
1220 goto probe_disable_device;
1221 }
1222
1223 /* Clear our data area */
1224 ha = (struct scsi_qla_host *) host->hostdata;
1225 memset(ha, 0, sizeof(*ha));
1226
1227 /* Save the information from PCI BIOS. */
1228 ha->pdev = pdev;
1229 ha->host = host;
1230 ha->host_no = host->host_no;
1231
1232 /* Configure PCI I/O space. */
1233 ret = qla4xxx_iospace_config(ha);
1234 if (ret)
1235 goto probe_failed;
1236
1237 dev_info(&ha->pdev->dev, "Found an ISP%04x, irq %d, iobase 0x%p\n",
1238 pdev->device, pdev->irq, ha->reg);
1239
1240 qla4xxx_config_dma_addressing(ha);
1241
1242 /* Initialize lists and spinlocks. */
1243 INIT_LIST_HEAD(&ha->ddb_list);
1244 INIT_LIST_HEAD(&ha->free_srb_q);
1245
1246 mutex_init(&ha->mbox_sem);
afaf5a2d
DS		 1247
1248 spin_lock_init(&ha->hardware_lock);
afaf5a2d
DS		 1249
1250 /* Allocate dma buffers */
1251 if (qla4xxx_mem_alloc(ha)) {
1252 dev_warn(&ha->pdev->dev,
1253 "[ERROR] Failed to allocate memory for adapter\n");
1254
1255 ret = -ENOMEM;
1256 goto probe_failed;
1257 }
1258
1259 /*
1260 * Initialize the Host adapter request/response queues and
1261 * firmware
1262 * NOTE: interrupts enabled upon successful completion
1263 */
1264 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1265 while (status == QLA_ERROR && init_retry_count++ < MAX_INIT_RETRIES) {
1266 DEBUG2(printk("scsi: %s: retrying adapter initialization "
1267 "(%d)\n", __func__, init_retry_count));
1268 qla4xxx_soft_reset(ha);
1269 status = qla4xxx_initialize_adapter(ha, REBUILD_DDB_LIST);
1270 }
1271 if (status == QLA_ERROR) {
1272 dev_warn(&ha->pdev->dev, "Failed to initialize adapter\n");
1273
1274 ret = -ENODEV;
1275 goto probe_failed;
1276 }
1277
1278 host->cmd_per_lun = 3;
1279 host->max_channel = 0;
1280 host->max_lun = MAX_LUNS - 1;
1281 host->max_id = MAX_TARGETS;
1282 host->max_cmd_len = IOCB_MAX_CDB_LEN;
1283 host->can_queue = MAX_SRBS ;
1284 host->transportt = qla4xxx_scsi_transport;
1285
1286 ret = scsi_init_shared_tag_map(host, MAX_SRBS);
1287 if (ret) {
1288 dev_warn(&ha->pdev->dev, "scsi_init_shared_tag_map failed");
1289 goto probe_failed;
1290 }
1291
1292 /* Startup the kernel thread for this host adapter. */
1293 DEBUG2(printk("scsi: %s: Starting kernel thread for "
1294 "qla4xxx_dpc\n", __func__));
1295 sprintf(buf, "qla4xxx_%lu_dpc", ha->host_no);
1296 ha->dpc_thread = create_singlethread_workqueue(buf);
1297 if (!ha->dpc_thread) {
1298 dev_warn(&ha->pdev->dev, "Unable to start DPC thread!\n");
1299 ret = -ENODEV;
1300 goto probe_failed;
1301 }
c4028958 1302 INIT_WORK(&ha->dpc_work, qla4xxx_do_dpc);
afaf5a2d
DS		 1303
1304 ret = request_irq(pdev->irq, qla4xxx_intr_handler,
38515e90 1305 IRQF_DISABLED | IRQF_SHARED, "qla4xxx", ha);
afaf5a2d
DS		 1306 if (ret) {
1307 dev_warn(&ha->pdev->dev, "Failed to reserve interrupt %d"
1308 " already in use.\n", pdev->irq);
1309 goto probe_failed;
1310 }
1311 set_bit(AF_IRQ_ATTACHED, &ha->flags);
1312 host->irq = pdev->irq;
1313 DEBUG(printk("scsi%d: irq %d attached\n", ha->host_no, ha->pdev->irq));
1314
1315 qla4xxx_enable_intrs(ha);
1316
1317 /* Start timer thread. */
1318 qla4xxx_start_timer(ha, qla4xxx_timer, 1);
1319
1320 set_bit(AF_INIT_DONE, &ha->flags);
1321
1322 pci_set_drvdata(pdev, ha);
1323
1324 ret = scsi_add_host(host, &pdev->dev);
1325 if (ret)
1326 goto probe_failed;
1327
1328 /* Update transport device information for all devices. */
1329 list_for_each_entry_safe(ddb_entry, ddbtemp, &ha->ddb_list, list) {
1330 if (ddb_entry->fw_ddb_device_state == DDB_DS_SESSION_ACTIVE)
1331 if (qla4xxx_add_sess(ddb_entry))
1332 goto remove_host;
1333 }
1334
1335 printk(KERN_INFO
1336 " QLogic iSCSI HBA Driver version: %s\n"
1337 " QLogic ISP%04x @ %s, host#=%ld, fw=%02d.%02d.%02d.%02d\n",
1338 qla4xxx_version_str, ha->pdev->device, pci_name(ha->pdev),
1339 ha->host_no, ha->firmware_version[0], ha->firmware_version[1],
1340 ha->patch_number, ha->build_number);
1341
1342 return 0;
1343
1344remove_host:
1345 qla4xxx_free_ddb_list(ha);
1346 scsi_remove_host(host);
1347
1348probe_failed:
1349 qla4xxx_free_adapter(ha);
1350 scsi_host_put(ha->host);
1351
1352probe_disable_device:
1353 pci_disable_device(pdev);
1354
1355 return ret;
1356}
1357
1358/**
1359 * qla4xxx_remove_adapter - calback function to remove adapter.
1360 * @pci_dev: PCI device pointer
1361 **/
1362static void __devexit qla4xxx_remove_adapter(struct pci_dev *pdev)
1363{
1364 struct scsi_qla_host *ha;
1365
1366 ha = pci_get_drvdata(pdev);
1367
bee4fe8e
DS		 1368 qla4xxx_disable_intrs(ha);
1369
1370 while (test_bit(DPC_RESET_HA_INTR, &ha->dpc_flags))
1371 ssleep(1);
1372
afaf5a2d
DS		 1373 /* remove devs from iscsi_sessions to scsi_devices */
1374 qla4xxx_free_ddb_list(ha);
1375
1376 scsi_remove_host(ha->host);
1377
1378 qla4xxx_free_adapter(ha);
1379
1380 scsi_host_put(ha->host);
1381
1382 pci_set_drvdata(pdev, NULL);
1383}
1384
1385/**
1386 * qla4xxx_config_dma_addressing() - Configure OS DMA addressing method.
1387 * @ha: HA context
1388 *
1389 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1390 * supported addressing method.
1391 */
47975477 1392static void qla4xxx_config_dma_addressing(struct scsi_qla_host *ha)
afaf5a2d
DS		 1393{
1394 int retval;
1395
1396 /* Update our PCI device dma_mask for full 64 bit mask */
1397 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1398 if (pci_set_consistent_dma_mask(ha->pdev, DMA_64BIT_MASK)) {
1399 dev_dbg(&ha->pdev->dev,
1400 "Failed to set 64 bit PCI consistent mask; "
1401 "using 32 bit.\n");
1402 retval = pci_set_consistent_dma_mask(ha->pdev,
1403 DMA_32BIT_MASK);
1404 }
1405 } else
1406 retval = pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1407}
1408
1409static int qla4xxx_slave_alloc(struct scsi_device *sdev)
1410{
1411 struct iscsi_cls_session *sess = starget_to_session(sdev->sdev_target);
1412 struct ddb_entry *ddb = sess->dd_data;
1413
1414 sdev->hostdata = ddb;
1415 sdev->tagged_supported = 1;
1416 scsi_activate_tcq(sdev, sdev->host->can_queue);
1417 return 0;
1418}
1419
1420static int qla4xxx_slave_configure(struct scsi_device *sdev)
1421{
1422 sdev->tagged_supported = 1;
1423 return 0;
1424}
1425
1426static void qla4xxx_slave_destroy(struct scsi_device *sdev)
1427{
1428 scsi_deactivate_tcq(sdev, 1);
1429}
1430
1431/**
1432 * qla4xxx_del_from_active_array - returns an active srb
1433 * @ha: Pointer to host adapter structure.
1434 * @index: index into to the active_array
1435 *
1436 * This routine removes and returns the srb at the specified index
1437 **/
1438struct srb * qla4xxx_del_from_active_array(struct scsi_qla_host *ha, uint32_t index)
1439{
1440 struct srb *srb = NULL;
1441 struct scsi_cmnd *cmd;
1442
1443 if (!(cmd = scsi_host_find_tag(ha->host, index)))
1444 return srb;
1445
1446 if (!(srb = (struct srb *)cmd->host_scribble))
1447 return srb;
1448
1449 /* update counters */
1450 if (srb->flags & SRB_DMA_VALID) {
1451 ha->req_q_count += srb->iocb_cnt;
1452 ha->iocb_cnt -= srb->iocb_cnt;
1453 if (srb->cmd)
1454 srb->cmd->host_scribble = NULL;
1455 }
1456 return srb;
1457}
1458
afaf5a2d
DS		 1459/**
1460 * qla4xxx_eh_wait_on_command - waits for command to be returned by firmware
1461 * @ha: actual ha whose done queue will contain the comd returned by firmware.
1462 * @cmd: Scsi Command to wait on.
1463 *
1464 * This routine waits for the command to be returned by the Firmware
1465 * for some max time.
1466 **/
1467static int qla4xxx_eh_wait_on_command(struct scsi_qla_host *ha,
1468 struct scsi_cmnd *cmd)
1469{
1470 int done = 0;
1471 struct srb *rp;
1472 uint32_t max_wait_time = EH_WAIT_CMD_TOV;
1473
1474 do {
1475 /* Checking to see if its returned to OS */
1476 rp = (struct srb *) cmd->SCp.ptr;
1477 if (rp == NULL) {
1478 done++;
1479 break;
1480 }
1481
1482 msleep(2000);
1483 } while (max_wait_time--);
1484
1485 return done;
1486}
1487
1488/**
1489 * qla4xxx_wait_for_hba_online - waits for HBA to come online
1490 * @ha: Pointer to host adapter structure
1491 **/
1492static int qla4xxx_wait_for_hba_online(struct scsi_qla_host *ha)
1493{
1494 unsigned long wait_online;
1495
1496 wait_online = jiffies + (30 * HZ);
1497 while (time_before(jiffies, wait_online)) {
1498
1499 if (adapter_up(ha))
1500 return QLA_SUCCESS;
1501 else if (ha->retry_reset_ha_cnt == 0)
1502 return QLA_ERROR;
1503
1504 msleep(2000);
1505 }
1506
1507 return QLA_ERROR;
1508}
1509
1510/**
1511 * qla4xxx_eh_wait_for_active_target_commands - wait for active cmds to finish.
1512 * @ha: pointer to to HBA
1513 * @t: target id
1514 * @l: lun id
1515 *
1516 * This function waits for all outstanding commands to a lun to complete. It
1517 * returns 0 if all pending commands are returned and 1 otherwise.
1518 **/
1519static int qla4xxx_eh_wait_for_active_target_commands(struct scsi_qla_host *ha,
1520 int t, int l)
1521{
1522 int cnt;
1523 int status = 0;
1524 struct scsi_cmnd *cmd;
1525
1526 /*
1527 * Waiting for all commands for the designated target in the active
1528 * array
1529 */
1530 for (cnt = 0; cnt < ha->host->can_queue; cnt++) {
1531 cmd = scsi_host_find_tag(ha->host, cnt);
1532 if (cmd && cmd->device->id == t && cmd->device->lun == l) {
1533 if (!qla4xxx_eh_wait_on_command(ha, cmd)) {
1534 status++;
1535 break;
1536 }
1537 }
1538 }
1539 return status;
1540}
1541
1542/**
1543 * qla4xxx_eh_device_reset - callback for target reset.
1544 * @cmd: Pointer to Linux's SCSI command structure
1545 *
1546 * This routine is called by the Linux OS to reset all luns on the
1547 * specified target.
1548 **/
1549static int qla4xxx_eh_device_reset(struct scsi_cmnd *cmd)
1550{
1551 struct scsi_qla_host *ha = to_qla_host(cmd->device->host);
1552 struct ddb_entry *ddb_entry = cmd->device->hostdata;
1553 struct srb *sp;
1554 int ret = FAILED, stat;
1555
1556 sp = (struct srb *) cmd->SCp.ptr;
1557 if (!sp || !ddb_entry)
1558 return ret;
1559
1560 dev_info(&ha->pdev->dev,
1561 "scsi%ld:%d:%d:%d: DEVICE RESET ISSUED.\n", ha->host_no,
1562 cmd->device->channel, cmd->device->id, cmd->device->lun);
1563
1564 DEBUG2(printk(KERN_INFO
1565 "scsi%ld: DEVICE_RESET cmd=%p jiffies = 0x%lx, to=%x,"
1566 "dpc_flags=%lx, status=%x allowed=%d\n", ha->host_no,
1567 cmd, jiffies, cmd->timeout_per_command / HZ,
1568 ha->dpc_flags, cmd->result, cmd->allowed));
1569
1570 /* FIXME: wait for hba to go online */
1571 stat = qla4xxx_reset_lun(ha, ddb_entry, cmd->device->lun);
1572 if (stat != QLA_SUCCESS) {
1573 dev_info(&ha->pdev->dev, "DEVICE RESET FAILED. %d\n", stat);
1574 goto eh_dev_reset_done;
1575 }
1576
1577 /* Send marker. */
1578 ha->marker_needed = 1;
1579
1580 /*
1581 * If we are coming down the EH path, wait for all commands to complete
1582 * for the device.
1583 */
1584 if (cmd->device->host->shost_state == SHOST_RECOVERY) {
1585 if (qla4xxx_eh_wait_for_active_target_commands(ha,
1586 cmd->device->id,
1587 cmd->device->lun)){
1588 dev_info(&ha->pdev->dev,
1589 "DEVICE RESET FAILED - waiting for "
1590 "commands.\n");
1591 goto eh_dev_reset_done;
1592 }
1593 }
1594
1595 dev_info(&ha->pdev->dev,
1596 "scsi(%ld:%d:%d:%d): DEVICE RESET SUCCEEDED.\n",
1597 ha->host_no, cmd->device->channel, cmd->device->id,
1598 cmd->device->lun);
1599
1600 ret = SUCCESS;
1601
1602eh_dev_reset_done:
1603
1604 return ret;
1605}
1606
1607/**
1608 * qla4xxx_eh_host_reset - kernel callback
1609 * @cmd: Pointer to Linux's SCSI command structure
1610 *
1611 * This routine is invoked by the Linux kernel to perform fatal error
1612 * recovery on the specified adapter.
1613 **/
1614static int qla4xxx_eh_host_reset(struct scsi_cmnd *cmd)
1615{
1616 int return_status = FAILED;
1617 struct scsi_qla_host *ha;
1618
1619 ha = (struct scsi_qla_host *) cmd->device->host->hostdata;
1620
1621 dev_info(&ha->pdev->dev,
1622 "scsi(%ld:%d:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no,
1623 cmd->device->channel, cmd->device->id, cmd->device->lun);
1624
1625 if (qla4xxx_wait_for_hba_online(ha) != QLA_SUCCESS) {
1626 DEBUG2(printk("scsi%ld:%d: %s: Unable to reset host. Adapter "
1627 "DEAD.\n", ha->host_no, cmd->device->channel,
1628 __func__));
1629
1630 return FAILED;
1631 }
1632
1633 if (qla4xxx_recover_adapter(ha, PRESERVE_DDB_LIST) == QLA_SUCCESS) {
1634 return_status = SUCCESS;
1635 }
1636
1637 dev_info(&ha->pdev->dev, "HOST RESET %s.\n",
1638 return_status == FAILED ? "FAILED" : "SUCCEDED");
1639
1640 return return_status;
1641}
1642
1643
1644static struct pci_device_id qla4xxx_pci_tbl[] = {
1645 {
1646 .vendor = PCI_VENDOR_ID_QLOGIC,
1647 .device = PCI_DEVICE_ID_QLOGIC_ISP4010,
1648 .subvendor = PCI_ANY_ID,
1649 .subdevice = PCI_ANY_ID,
1650 },
1651 {
1652 .vendor = PCI_VENDOR_ID_QLOGIC,
1653 .device = PCI_DEVICE_ID_QLOGIC_ISP4022,
1654 .subvendor = PCI_ANY_ID,
1655 .subdevice = PCI_ANY_ID,
1656 },
d915058f
DS		 1657 {
1658 .vendor = PCI_VENDOR_ID_QLOGIC,
1659 .device = PCI_DEVICE_ID_QLOGIC_ISP4032,
1660 .subvendor = PCI_ANY_ID,
1661 .subdevice = PCI_ANY_ID,
1662 },
afaf5a2d
DS		 1663 {0, 0},
1664};
1665MODULE_DEVICE_TABLE(pci, qla4xxx_pci_tbl);
1666
47975477 1667static struct pci_driver qla4xxx_pci_driver = {
afaf5a2d
DS		 1668 .name = DRIVER_NAME,
1669 .id_table = qla4xxx_pci_tbl,
1670 .probe = qla4xxx_probe_adapter,
1671 .remove = qla4xxx_remove_adapter,
1672};
1673
1674static int __init qla4xxx_module_init(void)
1675{
1676 int ret;
1677
1678 /* Allocate cache for SRBs. */
1679 srb_cachep = kmem_cache_create("qla4xxx_srbs", sizeof(struct srb), 0,
20c2df83 1680 SLAB_HWCACHE_ALIGN, NULL);
afaf5a2d
DS		 1681 if (srb_cachep == NULL) {
1682 printk(KERN_ERR
1683 "%s: Unable to allocate SRB cache..."
1684 "Failing load!\n", DRIVER_NAME);
1685 ret = -ENOMEM;
1686 goto no_srp_cache;
1687 }
1688
1689 /* Derive version string. */
1690 strcpy(qla4xxx_version_str, QLA4XXX_DRIVER_VERSION);
11010fec 1691 if (ql4xextended_error_logging)
afaf5a2d
DS		 1692 strcat(qla4xxx_version_str, "-debug");
1693
1694 qla4xxx_scsi_transport =
1695 iscsi_register_transport(&qla4xxx_iscsi_transport);
1696 if (!qla4xxx_scsi_transport){
1697 ret = -ENODEV;
1698 goto release_srb_cache;
1699 }
1700
afaf5a2d
DS		 1701 ret = pci_register_driver(&qla4xxx_pci_driver);
1702 if (ret)
1703 goto unregister_transport;
1704
1705 printk(KERN_INFO "QLogic iSCSI HBA Driver\n");
1706 return 0;
5ae16db3 1707
afaf5a2d
DS		 1708unregister_transport:
1709 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1710release_srb_cache:
1711 kmem_cache_destroy(srb_cachep);
1712no_srp_cache:
1713 return ret;
1714}
1715
1716static void __exit qla4xxx_module_exit(void)
1717{
477ffb9d 1718 ql4_mod_unload = 1;
afaf5a2d
DS		 1719 pci_unregister_driver(&qla4xxx_pci_driver);
1720 iscsi_unregister_transport(&qla4xxx_iscsi_transport);
1721 kmem_cache_destroy(srb_cachep);
1722}
1723
1724module_init(qla4xxx_module_init);
1725module_exit(qla4xxx_module_exit);
1726
1727MODULE_AUTHOR("QLogic Corporation");
1728MODULE_DESCRIPTION("QLogic iSCSI HBA Driver");
1729MODULE_LICENSE("GPL");
1730MODULE_VERSION(QLA4XXX_DRIVER_VERSION);
Linux 6.x block layer and io_uring tree(s)