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[deliverable/linux.git] / drivers / scsi / qla2xxx / qla_os.c
1 /*
2 * QLOGIC LINUX SOFTWARE
3 *
4 * QLogic ISP2x00 device driver for Linux 2.6.x
5 * Copyright (C) 2003-2004 QLogic Corporation
6 * (www.qlogic.com)
7 *
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2, or (at your option) any
11 * later version.
12 *
13 * This program is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
16 * General Public License for more details.
17 *
18 */
19 #include "qla_def.h"
20
21 #include <linux/moduleparam.h>
22 #include <linux/vmalloc.h>
23 #include <linux/smp_lock.h>
24 #include <linux/delay.h>
25
26 #include <scsi/scsi_tcq.h>
27 #include <scsi/scsicam.h>
28 #include <scsi/scsi_transport.h>
29 #include <scsi/scsi_transport_fc.h>
30
31 /*
32 * Driver version
33 */
34 char qla2x00_version_str[40];
35
36 /*
37 * SRB allocation cache
38 */
39 static kmem_cache_t *srb_cachep;
40
41 /*
42 * Ioctl related information.
43 */
44 static int num_hosts;
45
46 int ql2xlogintimeout = 20;
47 module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
48 MODULE_PARM_DESC(ql2xlogintimeout,
49 "Login timeout value in seconds.");
50
51 int qlport_down_retry = 30;
52 module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
53 MODULE_PARM_DESC(qlport_down_retry,
54 "Maximum number of command retries to a port that returns"
55 "a PORT-DOWN status.");
56
57 int ql2xplogiabsentdevice;
58 module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
59 MODULE_PARM_DESC(ql2xplogiabsentdevice,
60 "Option to enable PLOGI to devices that are not present after "
61 "a Fabric scan. This is needed for several broken switches."
62 "Default is 0 - no PLOGI. 1 - perfom PLOGI.");
63
64 int ql2xenablezio = 0;
65 module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
66 MODULE_PARM_DESC(ql2xenablezio,
67 "Option to enable ZIO:If 1 then enable it otherwise"
68 " use the default set in the NVRAM."
69 " Default is 0 : disabled");
70
71 int ql2xintrdelaytimer = 10;
72 module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
73 MODULE_PARM_DESC(ql2xintrdelaytimer,
74 "ZIO: Waiting time for Firmware before it generates an "
75 "interrupt to the host to notify completion of request.");
76
77 int ql2xloginretrycount = 0;
78 module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
79 MODULE_PARM_DESC(ql2xloginretrycount,
80 "Specify an alternate value for the NVRAM login retry count.");
81
82 static void qla2x00_free_device(scsi_qla_host_t *);
83
84 static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
85
86 /*
87 * SCSI host template entry points
88 */
89 static int qla2xxx_slave_configure(struct scsi_device * device);
90 static int qla2xxx_slave_alloc(struct scsi_device *);
91 static void qla2xxx_slave_destroy(struct scsi_device *);
92 static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
93 void (*fn)(struct scsi_cmnd *));
94 static int qla2xxx_eh_abort(struct scsi_cmnd *);
95 static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
96 static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
97 static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
98 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
99 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
100
101 static struct scsi_host_template qla2x00_driver_template = {
102 .module = THIS_MODULE,
103 .name = "qla2xxx",
104 .queuecommand = qla2x00_queuecommand,
105
106 .eh_abort_handler = qla2xxx_eh_abort,
107 .eh_device_reset_handler = qla2xxx_eh_device_reset,
108 .eh_bus_reset_handler = qla2xxx_eh_bus_reset,
109 .eh_host_reset_handler = qla2xxx_eh_host_reset,
110
111 .slave_configure = qla2xxx_slave_configure,
112
113 .slave_alloc = qla2xxx_slave_alloc,
114 .slave_destroy = qla2xxx_slave_destroy,
115 .this_id = -1,
116 .cmd_per_lun = 3,
117 .use_clustering = ENABLE_CLUSTERING,
118 .sg_tablesize = SG_ALL,
119
120 /*
121 * The RISC allows for each command to transfer (2^32-1) bytes of data,
122 * which equates to 0x800000 sectors.
123 */
124 .max_sectors = 0xFFFF,
125 };
126
127 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
128
129 /* TODO Convert to inlines
130 *
131 * Timer routines
132 */
133 #define WATCH_INTERVAL 1 /* number of seconds */
134
135 static void qla2x00_timer(scsi_qla_host_t *);
136
137 static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
138 void *, unsigned long);
139 static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
140 static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
141
142 static inline void
143 qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
144 {
145 init_timer(&ha->timer);
146 ha->timer.expires = jiffies + interval * HZ;
147 ha->timer.data = (unsigned long)ha;
148 ha->timer.function = (void (*)(unsigned long))func;
149 add_timer(&ha->timer);
150 ha->timer_active = 1;
151 }
152
153 static inline void
154 qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
155 {
156 mod_timer(&ha->timer, jiffies + interval * HZ);
157 }
158
159 static __inline__ void
160 qla2x00_stop_timer(scsi_qla_host_t *ha)
161 {
162 del_timer_sync(&ha->timer);
163 ha->timer_active = 0;
164 }
165
166 static int qla2x00_do_dpc(void *data);
167
168 static void qla2x00_rst_aen(scsi_qla_host_t *);
169
170 static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
171 static void qla2x00_mem_free(scsi_qla_host_t *ha);
172 static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
173 static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
174 static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
175 static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
176 void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
177
178 /* -------------------------------------------------------------------------- */
179
180 static char *
181 qla2x00_get_pci_info_str(struct scsi_qla_host *ha, char *str)
182 {
183 static char *pci_bus_modes[] = {
184 "33", "66", "100", "133",
185 };
186 uint16_t pci_bus;
187
188 strcpy(str, "PCI");
189 pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
190 if (pci_bus) {
191 strcat(str, "-X (");
192 strcat(str, pci_bus_modes[pci_bus]);
193 } else {
194 pci_bus = (ha->pci_attr & BIT_8) >> 8;
195 strcat(str, " (");
196 strcat(str, pci_bus_modes[pci_bus]);
197 }
198 strcat(str, " MHz)");
199
200 return (str);
201 }
202
203 char *
204 qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
205 {
206 char un_str[10];
207
208 sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
209 ha->fw_minor_version,
210 ha->fw_subminor_version);
211
212 if (ha->fw_attributes & BIT_9) {
213 strcat(str, "FLX");
214 return (str);
215 }
216
217 switch (ha->fw_attributes & 0xFF) {
218 case 0x7:
219 strcat(str, "EF");
220 break;
221 case 0x17:
222 strcat(str, "TP");
223 break;
224 case 0x37:
225 strcat(str, "IP");
226 break;
227 case 0x77:
228 strcat(str, "VI");
229 break;
230 default:
231 sprintf(un_str, "(%x)", ha->fw_attributes);
232 strcat(str, un_str);
233 break;
234 }
235 if (ha->fw_attributes & 0x100)
236 strcat(str, "X");
237
238 return (str);
239 }
240
241 /**************************************************************************
242 * qla2x00_queuecommand
243 *
244 * Description:
245 * Queue a command to the controller.
246 *
247 * Input:
248 * cmd - pointer to Scsi cmd structure
249 * fn - pointer to Scsi done function
250 *
251 * Returns:
252 * 0 - Always
253 *
254 * Note:
255 * The mid-level driver tries to ensures that queuecommand never gets invoked
256 * concurrently with itself or the interrupt handler (although the
257 * interrupt handler may call this routine as part of request-completion
258 * handling).
259 **************************************************************************/
260 static int
261 qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
262 {
263 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
264 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
265 srb_t *sp;
266 int rval;
267
268 if (!fcport) {
269 cmd->result = DID_NO_CONNECT << 16;
270 goto qc_fail_command;
271 }
272
273 if (atomic_read(&fcport->state) != FCS_ONLINE) {
274 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
275 atomic_read(&ha->loop_state) == LOOP_DEAD) {
276 cmd->result = DID_NO_CONNECT << 16;
277 goto qc_fail_command;
278 }
279 goto qc_host_busy;
280 }
281
282 spin_unlock_irq(ha->host->host_lock);
283
284 /* Allocate a command packet from the "sp" pool. */
285 if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
286 goto qc_host_busy_lock;
287 }
288
289 sp->ha = ha;
290 sp->fcport = fcport;
291 sp->cmd = cmd;
292 sp->flags = 0;
293
294 CMD_SP(cmd) = (void *)sp;
295 cmd->scsi_done = done;
296
297 rval = qla2x00_start_scsi(sp);
298 if (rval != QLA_SUCCESS)
299 goto qc_host_busy_free_sp;
300
301 /* Manage unprocessed RIO/ZIO commands in response queue. */
302 if (ha->flags.online && ha->flags.process_response_queue &&
303 ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
304 unsigned long flags;
305
306 spin_lock_irqsave(&ha->hardware_lock, flags);
307 qla2x00_process_response_queue(ha);
308 spin_unlock_irqrestore(&ha->hardware_lock, flags);
309 }
310
311 spin_lock_irq(ha->host->host_lock);
312
313 return 0;
314
315 qc_host_busy_free_sp:
316 qla2x00_sp_free_dma(ha, sp);
317 CMD_SP(cmd) = NULL;
318 mempool_free(sp, ha->srb_mempool);
319
320 qc_host_busy_lock:
321 spin_lock_irq(ha->host->host_lock);
322
323 qc_host_busy:
324 return SCSI_MLQUEUE_HOST_BUSY;
325
326 qc_fail_command:
327 done(cmd);
328
329 return 0;
330 }
331
332 /*
333 * qla2x00_eh_wait_on_command
334 * Waits for the command to be returned by the Firmware for some
335 * max time.
336 *
337 * Input:
338 * ha = actual ha whose done queue will contain the command
339 * returned by firmware.
340 * cmd = Scsi Command to wait on.
341 * flag = Abort/Reset(Bus or Device Reset)
342 *
343 * Return:
344 * Not Found : 0
345 * Found : 1
346 */
347 static int
348 qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
349 {
350 #define ABORT_POLLING_PERIOD HZ
351 #define ABORT_WAIT_ITER ((10 * HZ) / (ABORT_POLLING_PERIOD))
352 unsigned long wait_iter = ABORT_WAIT_ITER;
353 int ret = QLA_SUCCESS;
354
355 while (CMD_SP(cmd)) {
356 set_current_state(TASK_UNINTERRUPTIBLE);
357 schedule_timeout(ABORT_POLLING_PERIOD);
358
359 if (--wait_iter)
360 break;
361 }
362 if (CMD_SP(cmd))
363 ret = QLA_FUNCTION_FAILED;
364
365 return ret;
366 }
367
368 /*
369 * qla2x00_wait_for_hba_online
370 * Wait till the HBA is online after going through
371 * <= MAX_RETRIES_OF_ISP_ABORT or
372 * finally HBA is disabled ie marked offline
373 *
374 * Input:
375 * ha - pointer to host adapter structure
376 *
377 * Note:
378 * Does context switching-Release SPIN_LOCK
379 * (if any) before calling this routine.
380 *
381 * Return:
382 * Success (Adapter is online) : 0
383 * Failed (Adapter is offline/disabled) : 1
384 */
385 static int
386 qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
387 {
388 int return_status;
389 unsigned long wait_online;
390
391 wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
392 while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
393 test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
394 test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
395 ha->dpc_active) && time_before(jiffies, wait_online)) {
396
397 msleep(1000);
398 }
399 if (ha->flags.online)
400 return_status = QLA_SUCCESS;
401 else
402 return_status = QLA_FUNCTION_FAILED;
403
404 DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
405
406 return (return_status);
407 }
408
409 /*
410 * qla2x00_wait_for_loop_ready
411 * Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
412 * to be in LOOP_READY state.
413 * Input:
414 * ha - pointer to host adapter structure
415 *
416 * Note:
417 * Does context switching-Release SPIN_LOCK
418 * (if any) before calling this routine.
419 *
420 *
421 * Return:
422 * Success (LOOP_READY) : 0
423 * Failed (LOOP_NOT_READY) : 1
424 */
425 static inline int
426 qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
427 {
428 int return_status = QLA_SUCCESS;
429 unsigned long loop_timeout ;
430
431 /* wait for 5 min at the max for loop to be ready */
432 loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);
433
434 while ((!atomic_read(&ha->loop_down_timer) &&
435 atomic_read(&ha->loop_state) == LOOP_DOWN) ||
436 atomic_read(&ha->loop_state) != LOOP_READY) {
437 msleep(1000);
438 if (time_after_eq(jiffies, loop_timeout)) {
439 return_status = QLA_FUNCTION_FAILED;
440 break;
441 }
442 }
443 return (return_status);
444 }
445
446 /**************************************************************************
447 * qla2xxx_eh_abort
448 *
449 * Description:
450 * The abort function will abort the specified command.
451 *
452 * Input:
453 * cmd = Linux SCSI command packet to be aborted.
454 *
455 * Returns:
456 * Either SUCCESS or FAILED.
457 *
458 * Note:
459 **************************************************************************/
460 int
461 qla2xxx_eh_abort(struct scsi_cmnd *cmd)
462 {
463 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
464 srb_t *sp;
465 int ret, i;
466 unsigned int id, lun;
467 unsigned long serial;
468
469 if (!CMD_SP(cmd))
470 return FAILED;
471
472 ret = FAILED;
473
474 id = cmd->device->id;
475 lun = cmd->device->lun;
476 serial = cmd->serial_number;
477
478 /* Check active list for command command. */
479 spin_lock(&ha->hardware_lock);
480 for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
481 sp = ha->outstanding_cmds[i];
482
483 if (sp == NULL)
484 continue;
485
486 if (sp->cmd != cmd)
487 continue;
488
489 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
490 "sp->state=%x\n", __func__, ha->host_no, sp, serial,
491 sp->state));
492 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
493
494 spin_unlock(&ha->hardware_lock);
495 if (qla2x00_abort_command(ha, sp)) {
496 DEBUG2(printk("%s(%ld): abort_command "
497 "mbx failed.\n", __func__, ha->host_no));
498 } else {
499 DEBUG3(printk("%s(%ld): abort_command "
500 "mbx success.\n", __func__, ha->host_no));
501 ret = SUCCESS;
502 }
503 spin_lock(&ha->hardware_lock);
504
505 break;
506 }
507
508 /* Wait for the command to be returned. */
509 if (ret == SUCCESS) {
510 spin_unlock(&ha->hardware_lock);
511 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
512 qla_printk(KERN_ERR, ha,
513 "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
514 "%x.\n", ha->host_no, id, lun, serial, ret);
515 }
516 spin_lock(&ha->hardware_lock);
517 }
518
519 qla_printk(KERN_INFO, ha,
520 "scsi(%ld:%d:%d): Abort command issued -- %lx %x.\n", ha->host_no,
521 id, lun, serial, ret);
522
523 return ret;
524 }
525
526 /**************************************************************************
527 * qla2x00_eh_wait_for_pending_target_commands
528 *
529 * Description:
530 * Waits for all the commands to come back from the specified target.
531 *
532 * Input:
533 * ha - pointer to scsi_qla_host structure.
534 * t - target
535 * Returns:
536 * Either SUCCESS or FAILED.
537 *
538 * Note:
539 **************************************************************************/
540 static int
541 qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
542 {
543 int cnt;
544 int status;
545 srb_t *sp;
546 struct scsi_cmnd *cmd;
547
548 status = 0;
549
550 /*
551 * Waiting for all commands for the designated target in the active
552 * array
553 */
554 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
555 spin_lock(&ha->hardware_lock);
556 sp = ha->outstanding_cmds[cnt];
557 if (sp) {
558 cmd = sp->cmd;
559 spin_unlock(&ha->hardware_lock);
560 if (cmd->device->id == t) {
561 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
562 status = 1;
563 break;
564 }
565 }
566 } else {
567 spin_unlock(&ha->hardware_lock);
568 }
569 }
570 return (status);
571 }
572
573
574 /**************************************************************************
575 * qla2xxx_eh_device_reset
576 *
577 * Description:
578 * The device reset function will reset the target and abort any
579 * executing commands.
580 *
581 * NOTE: The use of SP is undefined within this context. Do *NOT*
582 * attempt to use this value, even if you determine it is
583 * non-null.
584 *
585 * Input:
586 * cmd = Linux SCSI command packet of the command that cause the
587 * bus device reset.
588 *
589 * Returns:
590 * SUCCESS/FAILURE (defined as macro in scsi.h).
591 *
592 **************************************************************************/
593 int
594 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
595 {
596 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
597 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
598 srb_t *sp;
599 int ret;
600 unsigned int id, lun;
601 unsigned long serial;
602
603 ret = FAILED;
604
605 id = cmd->device->id;
606 lun = cmd->device->lun;
607 serial = cmd->serial_number;
608
609 sp = (srb_t *) CMD_SP(cmd);
610 if (!sp || !fcport)
611 return ret;
612
613 qla_printk(KERN_INFO, ha,
614 "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
615
616 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
617 goto eh_dev_reset_done;
618
619 if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
620 if (qla2x00_device_reset(ha, fcport) == 0)
621 ret = SUCCESS;
622
623 #if defined(LOGOUT_AFTER_DEVICE_RESET)
624 if (ret == SUCCESS) {
625 if (fcport->flags & FC_FABRIC_DEVICE) {
626 qla2x00_fabric_logout(ha, fcport->loop_id);
627 qla2x00_mark_device_lost(ha, fcport);
628 }
629 }
630 #endif
631 } else {
632 DEBUG2(printk(KERN_INFO
633 "%s failed: loop not ready\n",__func__);)
634 }
635
636 if (ret == FAILED) {
637 DEBUG3(printk("%s(%ld): device reset failed\n",
638 __func__, ha->host_no));
639 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
640 __func__);
641
642 goto eh_dev_reset_done;
643 }
644
645 /*
646 * If we are coming down the EH path, wait for all commands to
647 * complete for the device.
648 */
649 if (cmd->device->host->eh_active) {
650 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
651 ret = FAILED;
652
653 if (ret == FAILED) {
654 DEBUG3(printk("%s(%ld): failed while waiting for "
655 "commands\n", __func__, ha->host_no));
656 qla_printk(KERN_INFO, ha,
657 "%s: failed while waiting for commands\n",
658 __func__);
659
660 goto eh_dev_reset_done;
661 }
662 }
663
664 qla_printk(KERN_INFO, ha,
665 "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
666
667 eh_dev_reset_done:
668 return ret;
669 }
670
671 /**************************************************************************
672 * qla2x00_eh_wait_for_pending_commands
673 *
674 * Description:
675 * Waits for all the commands to come back from the specified host.
676 *
677 * Input:
678 * ha - pointer to scsi_qla_host structure.
679 *
680 * Returns:
681 * 1 : SUCCESS
682 * 0 : FAILED
683 *
684 * Note:
685 **************************************************************************/
686 static int
687 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
688 {
689 int cnt;
690 int status;
691 srb_t *sp;
692 struct scsi_cmnd *cmd;
693
694 status = 1;
695
696 /*
697 * Waiting for all commands for the designated target in the active
698 * array
699 */
700 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
701 spin_lock(&ha->hardware_lock);
702 sp = ha->outstanding_cmds[cnt];
703 if (sp) {
704 cmd = sp->cmd;
705 spin_unlock(&ha->hardware_lock);
706 status = qla2x00_eh_wait_on_command(ha, cmd);
707 if (status == 0)
708 break;
709 }
710 else {
711 spin_unlock(&ha->hardware_lock);
712 }
713 }
714 return (status);
715 }
716
717
718 /**************************************************************************
719 * qla2xxx_eh_bus_reset
720 *
721 * Description:
722 * The bus reset function will reset the bus and abort any executing
723 * commands.
724 *
725 * Input:
726 * cmd = Linux SCSI command packet of the command that cause the
727 * bus reset.
728 *
729 * Returns:
730 * SUCCESS/FAILURE (defined as macro in scsi.h).
731 *
732 **************************************************************************/
733 int
734 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
735 {
736 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
737 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
738 srb_t *sp;
739 int ret;
740 unsigned int id, lun;
741 unsigned long serial;
742
743 ret = FAILED;
744
745 id = cmd->device->id;
746 lun = cmd->device->lun;
747 serial = cmd->serial_number;
748
749 sp = (srb_t *) CMD_SP(cmd);
750 if (!sp || !fcport)
751 return ret;
752
753 qla_printk(KERN_INFO, ha,
754 "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
755
756 spin_unlock_irq(ha->host->host_lock);
757
758 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
759 DEBUG2(printk("%s failed:board disabled\n",__func__));
760 goto eh_bus_reset_done;
761 }
762
763 if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
764 if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
765 ret = SUCCESS;
766 }
767 if (ret == FAILED)
768 goto eh_bus_reset_done;
769
770 /* Waiting for our command in done_queue to be returned to OS.*/
771 if (cmd->device->host->eh_active)
772 if (!qla2x00_eh_wait_for_pending_commands(ha))
773 ret = FAILED;
774
775 eh_bus_reset_done:
776 qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
777 (ret == FAILED) ? "failed" : "succeded");
778
779 spin_lock_irq(ha->host->host_lock);
780
781 return ret;
782 }
783
784 /**************************************************************************
785 * qla2xxx_eh_host_reset
786 *
787 * Description:
788 * The reset function will reset the Adapter.
789 *
790 * Input:
791 * cmd = Linux SCSI command packet of the command that cause the
792 * adapter reset.
793 *
794 * Returns:
795 * Either SUCCESS or FAILED.
796 *
797 * Note:
798 **************************************************************************/
799 int
800 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
801 {
802 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
803 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
804 srb_t *sp;
805 int ret;
806 unsigned int id, lun;
807 unsigned long serial;
808
809 ret = FAILED;
810
811 id = cmd->device->id;
812 lun = cmd->device->lun;
813 serial = cmd->serial_number;
814
815 sp = (srb_t *) CMD_SP(cmd);
816 if (!sp || !fcport)
817 return ret;
818
819 qla_printk(KERN_INFO, ha,
820 "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
821
822 spin_unlock_irq(ha->host->host_lock);
823
824 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
825 goto eh_host_reset_lock;
826
827 /*
828 * Fixme-may be dpc thread is active and processing
829 * loop_resync,so wait a while for it to
830 * be completed and then issue big hammer.Otherwise
831 * it may cause I/O failure as big hammer marks the
832 * devices as lost kicking of the port_down_timer
833 * while dpc is stuck for the mailbox to complete.
834 */
835 qla2x00_wait_for_loop_ready(ha);
836 set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
837 if (qla2x00_abort_isp(ha)) {
838 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
839 /* failed. schedule dpc to try */
840 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
841
842 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
843 goto eh_host_reset_lock;
844 }
845 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
846
847 /* Waiting for our command in done_queue to be returned to OS.*/
848 if (qla2x00_eh_wait_for_pending_commands(ha))
849 ret = SUCCESS;
850
851 eh_host_reset_lock:
852 spin_lock_irq(ha->host->host_lock);
853
854 qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
855 (ret == FAILED) ? "failed" : "succeded");
856
857 return ret;
858 }
859
860 /*
861 * qla2x00_loop_reset
862 * Issue loop reset.
863 *
864 * Input:
865 * ha = adapter block pointer.
866 *
867 * Returns:
868 * 0 = success
869 */
870 static int
871 qla2x00_loop_reset(scsi_qla_host_t *ha)
872 {
873 int status = QLA_SUCCESS;
874 struct fc_port *fcport;
875
876 if (ha->flags.enable_lip_reset) {
877 status = qla2x00_lip_reset(ha);
878 }
879
880 if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
881 list_for_each_entry(fcport, &ha->fcports, list) {
882 if (fcport->port_type != FCT_TARGET)
883 continue;
884
885 status = qla2x00_target_reset(ha, fcport);
886 if (status != QLA_SUCCESS)
887 break;
888 }
889 }
890
891 if (status == QLA_SUCCESS &&
892 ((!ha->flags.enable_target_reset &&
893 !ha->flags.enable_lip_reset) ||
894 ha->flags.enable_lip_full_login)) {
895
896 status = qla2x00_full_login_lip(ha);
897 }
898
899 /* Issue marker command only when we are going to start the I/O */
900 ha->marker_needed = 1;
901
902 if (status) {
903 /* Empty */
904 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
905 __func__,
906 ha->host_no);)
907 } else {
908 /* Empty */
909 DEBUG3(printk("%s(%ld): exiting normally.\n",
910 __func__,
911 ha->host_no);)
912 }
913
914 return(status);
915 }
916
917 /*
918 * qla2x00_device_reset
919 * Issue bus device reset message to the target.
920 *
921 * Input:
922 * ha = adapter block pointer.
923 * t = SCSI ID.
924 * TARGET_QUEUE_LOCK must be released.
925 * ADAPTER_STATE_LOCK must be released.
926 *
927 * Context:
928 * Kernel context.
929 */
930 static int
931 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
932 {
933 /* Abort Target command will clear Reservation */
934 return qla2x00_abort_target(reset_fcport);
935 }
936
937 static int
938 qla2xxx_slave_alloc(struct scsi_device *sdev)
939 {
940 scsi_qla_host_t *ha = to_qla_host(sdev->host);
941 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
942 fc_port_t *fcport;
943 int found;
944
945 if (!rport)
946 return -ENXIO;
947
948 found = 0;
949 list_for_each_entry(fcport, &ha->fcports, list) {
950 if (rport->port_name ==
951 be64_to_cpu(*(uint64_t *)fcport->port_name)) {
952 found++;
953 break;
954 }
955 }
956 if (!found)
957 return -ENXIO;
958
959 sdev->hostdata = fcport;
960
961 return 0;
962 }
963
964 static int
965 qla2xxx_slave_configure(struct scsi_device *sdev)
966 {
967 scsi_qla_host_t *ha = to_qla_host(sdev->host);
968 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
969
970 if (sdev->tagged_supported)
971 scsi_activate_tcq(sdev, 32);
972 else
973 scsi_deactivate_tcq(sdev, 32);
974
975 rport->dev_loss_tmo = ha->port_down_retry_count + 5;
976
977 return 0;
978 }
979
980 static void
981 qla2xxx_slave_destroy(struct scsi_device *sdev)
982 {
983 sdev->hostdata = NULL;
984 }
985
986 /**
987 * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
988 * @ha: HA context
989 *
990 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
991 * supported addressing method.
992 */
993 static void
994 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
995 {
996 /* Assume 32bit DMA address */
997 ha->flags.enable_64bit_addressing = 0;
998 ha->calc_request_entries = qla2x00_calc_iocbs_32;
999 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
1000
1001 /*
1002 * Given the two variants pci_set_dma_mask(), allow the compiler to
1003 * assist in setting the proper dma mask.
1004 */
1005 if (sizeof(dma_addr_t) > 4) {
1006 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1007 ha->flags.enable_64bit_addressing = 1;
1008 ha->calc_request_entries = qla2x00_calc_iocbs_64;
1009 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
1010
1011 if (pci_set_consistent_dma_mask(ha->pdev,
1012 DMA_64BIT_MASK)) {
1013 qla_printk(KERN_DEBUG, ha,
1014 "Failed to set 64 bit PCI consistent mask; "
1015 "using 32 bit.\n");
1016 pci_set_consistent_dma_mask(ha->pdev,
1017 DMA_32BIT_MASK);
1018 }
1019 } else {
1020 qla_printk(KERN_DEBUG, ha,
1021 "Failed to set 64 bit PCI DMA mask, falling back "
1022 "to 32 bit MASK.\n");
1023 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1024 }
1025 } else {
1026 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1027 }
1028 }
1029
1030 static int
1031 qla2x00_iospace_config(scsi_qla_host_t *ha)
1032 {
1033 unsigned long pio, pio_len, pio_flags;
1034 unsigned long mmio, mmio_len, mmio_flags;
1035
1036 /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1037 pio = pci_resource_start(ha->pdev, 0);
1038 pio_len = pci_resource_len(ha->pdev, 0);
1039 pio_flags = pci_resource_flags(ha->pdev, 0);
1040 if (pio_flags & IORESOURCE_IO) {
1041 if (pio_len < MIN_IOBASE_LEN) {
1042 qla_printk(KERN_WARNING, ha,
1043 "Invalid PCI I/O region size (%s)...\n",
1044 pci_name(ha->pdev));
1045 pio = 0;
1046 }
1047 } else {
1048 qla_printk(KERN_WARNING, ha,
1049 "region #0 not a PIO resource (%s)...\n",
1050 pci_name(ha->pdev));
1051 pio = 0;
1052 }
1053
1054 /* Use MMIO operations for all accesses. */
1055 mmio = pci_resource_start(ha->pdev, 1);
1056 mmio_len = pci_resource_len(ha->pdev, 1);
1057 mmio_flags = pci_resource_flags(ha->pdev, 1);
1058
1059 if (!(mmio_flags & IORESOURCE_MEM)) {
1060 qla_printk(KERN_ERR, ha,
1061 "region #0 not an MMIO resource (%s), aborting\n",
1062 pci_name(ha->pdev));
1063 goto iospace_error_exit;
1064 }
1065 if (mmio_len < MIN_IOBASE_LEN) {
1066 qla_printk(KERN_ERR, ha,
1067 "Invalid PCI mem region size (%s), aborting\n",
1068 pci_name(ha->pdev));
1069 goto iospace_error_exit;
1070 }
1071
1072 if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1073 qla_printk(KERN_WARNING, ha,
1074 "Failed to reserve PIO/MMIO regions (%s)\n",
1075 pci_name(ha->pdev));
1076
1077 goto iospace_error_exit;
1078 }
1079
1080 ha->pio_address = pio;
1081 ha->pio_length = pio_len;
1082 ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1083 if (!ha->iobase) {
1084 qla_printk(KERN_ERR, ha,
1085 "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1086
1087 goto iospace_error_exit;
1088 }
1089
1090 return (0);
1091
1092 iospace_error_exit:
1093 return (-ENOMEM);
1094 }
1095
1096 /*
1097 * PCI driver interface
1098 */
1099 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1100 {
1101 int ret;
1102 device_reg_t __iomem *reg;
1103 struct Scsi_Host *host;
1104 scsi_qla_host_t *ha;
1105 unsigned long flags = 0;
1106 unsigned long wait_switch = 0;
1107 char pci_info[20];
1108 char fw_str[30];
1109 fc_port_t *fcport;
1110
1111 if (pci_enable_device(pdev))
1112 return -1;
1113
1114 host = scsi_host_alloc(&qla2x00_driver_template,
1115 sizeof(scsi_qla_host_t));
1116 if (host == NULL) {
1117 printk(KERN_WARNING
1118 "qla2xxx: Couldn't allocate host from scsi layer!\n");
1119 goto probe_disable_device;
1120 }
1121
1122 /* Clear our data area */
1123 ha = (scsi_qla_host_t *)host->hostdata;
1124 memset(ha, 0, sizeof(scsi_qla_host_t));
1125
1126 ha->pdev = pdev;
1127 ha->host = host;
1128 ha->host_no = host->host_no;
1129 ha->brd_info = brd_info;
1130 sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1131
1132 /* Configure PCI I/O space */
1133 ret = qla2x00_iospace_config(ha);
1134 if (ret != 0) {
1135 goto probe_alloc_failed;
1136 }
1137
1138 /* Sanitize the information from PCI BIOS. */
1139 host->irq = pdev->irq;
1140
1141 qla_printk(KERN_INFO, ha,
1142 "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1143 host->irq, ha->iobase);
1144
1145 spin_lock_init(&ha->hardware_lock);
1146
1147 ha->prev_topology = 0;
1148 ha->ports = MAX_BUSES;
1149
1150 if (IS_QLA2100(ha)) {
1151 host->max_id = MAX_TARGETS_2100;
1152 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1153 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1154 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1155 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1156 host->sg_tablesize = 32;
1157 } else if (IS_QLA2200(ha)) {
1158 host->max_id = MAX_TARGETS_2200;
1159 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1160 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1161 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1162 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1163 } else /*if (IS_QLA2300(ha))*/ {
1164 host->max_id = MAX_TARGETS_2200;
1165 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1166 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1167 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1168 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1169 }
1170 host->can_queue = ha->request_q_length + 128;
1171
1172 /* load the F/W, read paramaters, and init the H/W */
1173 ha->instance = num_hosts;
1174
1175 init_MUTEX(&ha->mbx_cmd_sem);
1176 init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1177
1178 INIT_LIST_HEAD(&ha->list);
1179 INIT_LIST_HEAD(&ha->fcports);
1180 INIT_LIST_HEAD(&ha->rscn_fcports);
1181
1182 /*
1183 * These locks are used to prevent more than one CPU
1184 * from modifying the queue at the same time. The
1185 * higher level "host_lock" will reduce most
1186 * contention for these locks.
1187 */
1188 spin_lock_init(&ha->mbx_reg_lock);
1189
1190 ha->dpc_pid = -1;
1191 init_completion(&ha->dpc_inited);
1192 init_completion(&ha->dpc_exited);
1193
1194 qla2x00_config_dma_addressing(ha);
1195 if (qla2x00_mem_alloc(ha)) {
1196 qla_printk(KERN_WARNING, ha,
1197 "[ERROR] Failed to allocate memory for adapter\n");
1198
1199 goto probe_alloc_failed;
1200 }
1201
1202 pci_set_drvdata(pdev, ha);
1203 host->this_id = 255;
1204 host->cmd_per_lun = 3;
1205 host->unique_id = ha->instance;
1206 host->max_cmd_len = MAX_CMDSZ;
1207 host->max_channel = ha->ports - 1;
1208 host->max_lun = MAX_LUNS;
1209 host->transportt = qla2xxx_transport_template;
1210 if (scsi_add_host(host, &pdev->dev))
1211 goto probe_alloc_failed;
1212
1213 qla2x00_alloc_sysfs_attr(ha);
1214
1215 if (qla2x00_initialize_adapter(ha) &&
1216 !(ha->device_flags & DFLG_NO_CABLE)) {
1217
1218 qla_printk(KERN_WARNING, ha,
1219 "Failed to initialize adapter\n");
1220
1221 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1222 "Adapter flags %x.\n",
1223 ha->host_no, ha->device_flags));
1224
1225 goto probe_failed;
1226 }
1227
1228 qla2x00_init_host_attr(ha);
1229
1230 /*
1231 * Startup the kernel thread for this host adapter
1232 */
1233 ha->dpc_should_die = 0;
1234 ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1235 if (ha->dpc_pid < 0) {
1236 qla_printk(KERN_WARNING, ha,
1237 "Unable to start DPC thread!\n");
1238
1239 goto probe_failed;
1240 }
1241 wait_for_completion(&ha->dpc_inited);
1242
1243 if (IS_QLA2100(ha) || IS_QLA2200(ha))
1244 ret = request_irq(host->irq, qla2100_intr_handler,
1245 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1246 else
1247 ret = request_irq(host->irq, qla2300_intr_handler,
1248 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1249 if (ret != 0) {
1250 qla_printk(KERN_WARNING, ha,
1251 "Failed to reserve interrupt %d already in use.\n",
1252 host->irq);
1253 goto probe_failed;
1254 }
1255
1256 /* Initialized the timer */
1257 qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1258
1259 DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1260 ha->host_no, ha));
1261
1262 reg = ha->iobase;
1263
1264 /* Disable ISP interrupts. */
1265 qla2x00_disable_intrs(ha);
1266
1267 /* Ensure mailbox registers are free. */
1268 spin_lock_irqsave(&ha->hardware_lock, flags);
1269 WRT_REG_WORD(&reg->semaphore, 0);
1270 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1271 WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1272
1273 /* Enable proper parity */
1274 if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1275 if (IS_QLA2300(ha))
1276 /* SRAM parity */
1277 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1278 else
1279 /* SRAM, Instruction RAM and GP RAM parity */
1280 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1281 }
1282 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1283
1284 /* Enable chip interrupts. */
1285 qla2x00_enable_intrs(ha);
1286
1287 /* v2.19.5b6 */
1288 /*
1289 * Wait around max loop_reset_delay secs for the devices to come
1290 * on-line. We don't want Linux scanning before we are ready.
1291 *
1292 */
1293 for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1294 time_before(jiffies,wait_switch) &&
1295 !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1296 && (ha->device_flags & SWITCH_FOUND) ;) {
1297
1298 qla2x00_check_fabric_devices(ha);
1299
1300 msleep(10);
1301 }
1302
1303 ha->flags.init_done = 1;
1304 num_hosts++;
1305
1306 qla_printk(KERN_INFO, ha, "\n"
1307 " QLogic Fibre Channel HBA Driver: %s\n"
1308 " QLogic %s - %s\n"
1309 " %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1310 ha->model_number, ha->model_desc ? ha->model_desc: "",
1311 ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
1312 pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1313 ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
1314
1315 /* Go with fc_rport registration. */
1316 list_for_each_entry(fcport, &ha->fcports, list)
1317 qla2x00_reg_remote_port(ha, fcport);
1318
1319 return 0;
1320
1321 probe_failed:
1322 fc_remove_host(ha->host);
1323
1324 scsi_remove_host(host);
1325
1326 probe_alloc_failed:
1327 qla2x00_free_device(ha);
1328
1329 scsi_host_put(host);
1330
1331 probe_disable_device:
1332 pci_disable_device(pdev);
1333
1334 return -1;
1335 }
1336 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1337
1338 void qla2x00_remove_one(struct pci_dev *pdev)
1339 {
1340 scsi_qla_host_t *ha;
1341
1342 ha = pci_get_drvdata(pdev);
1343
1344 qla2x00_free_sysfs_attr(ha);
1345
1346 fc_remove_host(ha->host);
1347
1348 scsi_remove_host(ha->host);
1349
1350 qla2x00_free_device(ha);
1351
1352 scsi_host_put(ha->host);
1353
1354 pci_set_drvdata(pdev, NULL);
1355 }
1356 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1357
1358 static void
1359 qla2x00_free_device(scsi_qla_host_t *ha)
1360 {
1361 int ret;
1362
1363 /* Abort any outstanding IO descriptors. */
1364 if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1365 qla2x00_cancel_io_descriptors(ha);
1366
1367 /* turn-off interrupts on the card */
1368 if (ha->interrupts_on)
1369 qla2x00_disable_intrs(ha);
1370
1371 /* Disable timer */
1372 if (ha->timer_active)
1373 qla2x00_stop_timer(ha);
1374
1375 /* Kill the kernel thread for this host */
1376 if (ha->dpc_pid >= 0) {
1377 ha->dpc_should_die = 1;
1378 wmb();
1379 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1380 if (ret) {
1381 qla_printk(KERN_ERR, ha,
1382 "Unable to signal DPC thread -- (%d)\n", ret);
1383
1384 /* TODO: SOMETHING MORE??? */
1385 } else {
1386 wait_for_completion(&ha->dpc_exited);
1387 }
1388 }
1389
1390 qla2x00_mem_free(ha);
1391
1392
1393 ha->flags.online = 0;
1394
1395 /* Detach interrupts */
1396 if (ha->pdev->irq)
1397 free_irq(ha->pdev->irq, ha);
1398
1399 /* release io space registers */
1400 if (ha->iobase)
1401 iounmap(ha->iobase);
1402 pci_release_regions(ha->pdev);
1403
1404 pci_disable_device(ha->pdev);
1405 }
1406
1407 /*
1408 * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1409 *
1410 * Input: ha = adapter block pointer. fcport = port structure pointer.
1411 *
1412 * Return: None.
1413 *
1414 * Context:
1415 */
1416 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1417 int do_login)
1418 {
1419 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1420 fc_remote_port_block(fcport->rport);
1421 /*
1422 * We may need to retry the login, so don't change the state of the
1423 * port but do the retries.
1424 */
1425 if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1426 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1427
1428 if (!do_login)
1429 return;
1430
1431 if (fcport->login_retry == 0) {
1432 fcport->login_retry = ha->login_retry_count;
1433 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1434
1435 DEBUG(printk("scsi(%ld): Port login retry: "
1436 "%02x%02x%02x%02x%02x%02x%02x%02x, "
1437 "id = 0x%04x retry cnt=%d\n",
1438 ha->host_no,
1439 fcport->port_name[0],
1440 fcport->port_name[1],
1441 fcport->port_name[2],
1442 fcport->port_name[3],
1443 fcport->port_name[4],
1444 fcport->port_name[5],
1445 fcport->port_name[6],
1446 fcport->port_name[7],
1447 fcport->loop_id,
1448 fcport->login_retry));
1449 }
1450 }
1451
1452 /*
1453 * qla2x00_mark_all_devices_lost
1454 * Updates fcport state when device goes offline.
1455 *
1456 * Input:
1457 * ha = adapter block pointer.
1458 * fcport = port structure pointer.
1459 *
1460 * Return:
1461 * None.
1462 *
1463 * Context:
1464 */
1465 void
1466 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1467 {
1468 fc_port_t *fcport;
1469
1470 list_for_each_entry(fcport, &ha->fcports, list) {
1471 if (fcport->port_type != FCT_TARGET)
1472 continue;
1473
1474 /*
1475 * No point in marking the device as lost, if the device is
1476 * already DEAD.
1477 */
1478 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1479 continue;
1480 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1481 fc_remote_port_block(fcport->rport);
1482 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1483 }
1484 }
1485
1486 /*
1487 * qla2x00_mem_alloc
1488 * Allocates adapter memory.
1489 *
1490 * Returns:
1491 * 0 = success.
1492 * 1 = failure.
1493 */
1494 static uint8_t
1495 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1496 {
1497 char name[16];
1498 uint8_t status = 1;
1499 int retry= 10;
1500
1501 do {
1502 /*
1503 * This will loop only once if everything goes well, else some
1504 * number of retries will be performed to get around a kernel
1505 * bug where available mem is not allocated until after a
1506 * little delay and a retry.
1507 */
1508 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1509 (ha->request_q_length + 1) * sizeof(request_t),
1510 &ha->request_dma, GFP_KERNEL);
1511 if (ha->request_ring == NULL) {
1512 qla_printk(KERN_WARNING, ha,
1513 "Memory Allocation failed - request_ring\n");
1514
1515 qla2x00_mem_free(ha);
1516 msleep(100);
1517
1518 continue;
1519 }
1520
1521 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1522 (ha->response_q_length + 1) * sizeof(response_t),
1523 &ha->response_dma, GFP_KERNEL);
1524 if (ha->response_ring == NULL) {
1525 qla_printk(KERN_WARNING, ha,
1526 "Memory Allocation failed - response_ring\n");
1527
1528 qla2x00_mem_free(ha);
1529 msleep(100);
1530
1531 continue;
1532 }
1533
1534 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1535 &ha->gid_list_dma, GFP_KERNEL);
1536 if (ha->gid_list == NULL) {
1537 qla_printk(KERN_WARNING, ha,
1538 "Memory Allocation failed - gid_list\n");
1539
1540 qla2x00_mem_free(ha);
1541 msleep(100);
1542
1543 continue;
1544 }
1545
1546 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1547 sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1548 if (ha->rlc_rsp == NULL) {
1549 qla_printk(KERN_WARNING, ha,
1550 "Memory Allocation failed - rlc");
1551
1552 qla2x00_mem_free(ha);
1553 msleep(100);
1554
1555 continue;
1556 }
1557
1558 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1559 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1560 DMA_POOL_SIZE, 8, 0);
1561 if (ha->s_dma_pool == NULL) {
1562 qla_printk(KERN_WARNING, ha,
1563 "Memory Allocation failed - s_dma_pool\n");
1564
1565 qla2x00_mem_free(ha);
1566 msleep(100);
1567
1568 continue;
1569 }
1570
1571 /* get consistent memory allocated for init control block */
1572 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1573 &ha->init_cb_dma);
1574 if (ha->init_cb == NULL) {
1575 qla_printk(KERN_WARNING, ha,
1576 "Memory Allocation failed - init_cb\n");
1577
1578 qla2x00_mem_free(ha);
1579 msleep(100);
1580
1581 continue;
1582 }
1583 memset(ha->init_cb, 0, sizeof(init_cb_t));
1584
1585 /* Get consistent memory allocated for Get Port Database cmd */
1586 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1587 &ha->iodesc_pd_dma);
1588 if (ha->iodesc_pd == NULL) {
1589 /* error */
1590 qla_printk(KERN_WARNING, ha,
1591 "Memory Allocation failed - iodesc_pd\n");
1592
1593 qla2x00_mem_free(ha);
1594 msleep(100);
1595
1596 continue;
1597 }
1598 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1599
1600 /* Allocate ioctl related memory. */
1601 if (qla2x00_alloc_ioctl_mem(ha)) {
1602 qla_printk(KERN_WARNING, ha,
1603 "Memory Allocation failed - ioctl_mem\n");
1604
1605 qla2x00_mem_free(ha);
1606 msleep(100);
1607
1608 continue;
1609 }
1610
1611 if (qla2x00_allocate_sp_pool(ha)) {
1612 qla_printk(KERN_WARNING, ha,
1613 "Memory Allocation failed - "
1614 "qla2x00_allocate_sp_pool()\n");
1615
1616 qla2x00_mem_free(ha);
1617 msleep(100);
1618
1619 continue;
1620 }
1621
1622 /* Allocate memory for SNS commands */
1623 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1624 /* Get consistent memory allocated for SNS commands */
1625 ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1626 sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1627 GFP_KERNEL);
1628 if (ha->sns_cmd == NULL) {
1629 /* error */
1630 qla_printk(KERN_WARNING, ha,
1631 "Memory Allocation failed - sns_cmd\n");
1632
1633 qla2x00_mem_free(ha);
1634 msleep(100);
1635
1636 continue;
1637 }
1638 memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1639 } else {
1640 /* Get consistent memory allocated for MS IOCB */
1641 ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1642 &ha->ms_iocb_dma);
1643 if (ha->ms_iocb == NULL) {
1644 /* error */
1645 qla_printk(KERN_WARNING, ha,
1646 "Memory Allocation failed - ms_iocb\n");
1647
1648 qla2x00_mem_free(ha);
1649 msleep(100);
1650
1651 continue;
1652 }
1653 memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1654
1655 /*
1656 * Get consistent memory allocated for CT SNS
1657 * commands
1658 */
1659 ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1660 sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1661 GFP_KERNEL);
1662 if (ha->ct_sns == NULL) {
1663 /* error */
1664 qla_printk(KERN_WARNING, ha,
1665 "Memory Allocation failed - ct_sns\n");
1666
1667 qla2x00_mem_free(ha);
1668 msleep(100);
1669
1670 continue;
1671 }
1672 memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1673 }
1674
1675 /* Done all allocations without any error. */
1676 status = 0;
1677
1678 } while (retry-- && status != 0);
1679
1680 if (status) {
1681 printk(KERN_WARNING
1682 "%s(): **** FAILED ****\n", __func__);
1683 }
1684
1685 return(status);
1686 }
1687
1688 /*
1689 * qla2x00_mem_free
1690 * Frees all adapter allocated memory.
1691 *
1692 * Input:
1693 * ha = adapter block pointer.
1694 */
1695 static void
1696 qla2x00_mem_free(scsi_qla_host_t *ha)
1697 {
1698 struct list_head *fcpl, *fcptemp;
1699 fc_port_t *fcport;
1700 unsigned long wtime;/* max wait time if mbx cmd is busy. */
1701
1702 if (ha == NULL) {
1703 /* error */
1704 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1705 return;
1706 }
1707
1708 /* Make sure all other threads are stopped. */
1709 wtime = 60 * HZ;
1710 while (ha->dpc_wait && wtime) {
1711 set_current_state(TASK_INTERRUPTIBLE);
1712 wtime = schedule_timeout(wtime);
1713 }
1714
1715 /* free ioctl memory */
1716 qla2x00_free_ioctl_mem(ha);
1717
1718 /* free sp pool */
1719 qla2x00_free_sp_pool(ha);
1720
1721 if (ha->sns_cmd)
1722 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1723 ha->sns_cmd, ha->sns_cmd_dma);
1724
1725 if (ha->ct_sns)
1726 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1727 ha->ct_sns, ha->ct_sns_dma);
1728
1729 if (ha->ms_iocb)
1730 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1731
1732 if (ha->iodesc_pd)
1733 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1734
1735 if (ha->init_cb)
1736 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1737
1738 if (ha->s_dma_pool)
1739 dma_pool_destroy(ha->s_dma_pool);
1740
1741 if (ha->rlc_rsp)
1742 dma_free_coherent(&ha->pdev->dev,
1743 sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1744 ha->rlc_rsp_dma);
1745
1746 if (ha->gid_list)
1747 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1748 ha->gid_list_dma);
1749
1750 if (ha->response_ring)
1751 dma_free_coherent(&ha->pdev->dev,
1752 (ha->response_q_length + 1) * sizeof(response_t),
1753 ha->response_ring, ha->response_dma);
1754
1755 if (ha->request_ring)
1756 dma_free_coherent(&ha->pdev->dev,
1757 (ha->request_q_length + 1) * sizeof(request_t),
1758 ha->request_ring, ha->request_dma);
1759
1760 ha->sns_cmd = NULL;
1761 ha->sns_cmd_dma = 0;
1762 ha->ct_sns = NULL;
1763 ha->ct_sns_dma = 0;
1764 ha->ms_iocb = NULL;
1765 ha->ms_iocb_dma = 0;
1766 ha->iodesc_pd = NULL;
1767 ha->iodesc_pd_dma = 0;
1768 ha->init_cb = NULL;
1769 ha->init_cb_dma = 0;
1770
1771 ha->s_dma_pool = NULL;
1772
1773 ha->rlc_rsp = NULL;
1774 ha->rlc_rsp_dma = 0;
1775 ha->gid_list = NULL;
1776 ha->gid_list_dma = 0;
1777
1778 ha->response_ring = NULL;
1779 ha->response_dma = 0;
1780 ha->request_ring = NULL;
1781 ha->request_dma = 0;
1782
1783 list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1784 fcport = list_entry(fcpl, fc_port_t, list);
1785
1786 /* fc ports */
1787 list_del_init(&fcport->list);
1788 kfree(fcport);
1789 }
1790 INIT_LIST_HEAD(&ha->fcports);
1791
1792 if (ha->fw_dump)
1793 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1794
1795 if (ha->fw_dump_buffer)
1796 vfree(ha->fw_dump_buffer);
1797
1798 ha->fw_dump = NULL;
1799 ha->fw_dump_reading = 0;
1800 ha->fw_dump_buffer = NULL;
1801 }
1802
1803 /*
1804 * qla2x00_allocate_sp_pool
1805 * This routine is called during initialization to allocate
1806 * memory for local srb_t.
1807 *
1808 * Input:
1809 * ha = adapter block pointer.
1810 *
1811 * Context:
1812 * Kernel context.
1813 *
1814 * Note: Sets the ref_count for non Null sp to one.
1815 */
1816 static int
1817 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1818 {
1819 int rval;
1820
1821 rval = QLA_SUCCESS;
1822 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1823 mempool_free_slab, srb_cachep);
1824 if (ha->srb_mempool == NULL) {
1825 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1826 rval = QLA_FUNCTION_FAILED;
1827 }
1828 return (rval);
1829 }
1830
1831 /*
1832 * This routine frees all adapter allocated memory.
1833 *
1834 */
1835 static void
1836 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1837 {
1838 if (ha->srb_mempool) {
1839 mempool_destroy(ha->srb_mempool);
1840 ha->srb_mempool = NULL;
1841 }
1842 }
1843
1844 /**************************************************************************
1845 * qla2x00_do_dpc
1846 * This kernel thread is a task that is schedule by the interrupt handler
1847 * to perform the background processing for interrupts.
1848 *
1849 * Notes:
1850 * This task always run in the context of a kernel thread. It
1851 * is kick-off by the driver's detect code and starts up
1852 * up one per adapter. It immediately goes to sleep and waits for
1853 * some fibre event. When either the interrupt handler or
1854 * the timer routine detects a event it will one of the task
1855 * bits then wake us up.
1856 **************************************************************************/
1857 static int
1858 qla2x00_do_dpc(void *data)
1859 {
1860 DECLARE_MUTEX_LOCKED(sem);
1861 scsi_qla_host_t *ha;
1862 fc_port_t *fcport;
1863 uint8_t status;
1864 uint16_t next_loopid;
1865
1866 ha = (scsi_qla_host_t *)data;
1867
1868 lock_kernel();
1869
1870 daemonize("%s_dpc", ha->host_str);
1871 allow_signal(SIGHUP);
1872
1873 ha->dpc_wait = &sem;
1874
1875 set_user_nice(current, -20);
1876
1877 unlock_kernel();
1878
1879 complete(&ha->dpc_inited);
1880
1881 while (1) {
1882 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1883
1884 if (down_interruptible(&sem))
1885 break;
1886
1887 if (ha->dpc_should_die)
1888 break;
1889
1890 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1891
1892 /* Initialization not yet finished. Don't do anything yet. */
1893 if (!ha->flags.init_done || ha->dpc_active)
1894 continue;
1895
1896 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1897
1898 ha->dpc_active = 1;
1899
1900 if (ha->flags.mbox_busy) {
1901 ha->dpc_active = 0;
1902 continue;
1903 }
1904
1905 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1906
1907 DEBUG(printk("scsi(%ld): dpc: sched "
1908 "qla2x00_abort_isp ha = %p\n",
1909 ha->host_no, ha));
1910 if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1911 &ha->dpc_flags))) {
1912
1913 if (qla2x00_abort_isp(ha)) {
1914 /* failed. retry later */
1915 set_bit(ISP_ABORT_NEEDED,
1916 &ha->dpc_flags);
1917 }
1918 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1919 }
1920 DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1921 ha->host_no));
1922 }
1923
1924 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1925 (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1926
1927 DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1928 ha->host_no));
1929
1930 qla2x00_rst_aen(ha);
1931 clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1932 }
1933
1934 /* Retry each device up to login retry count */
1935 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1936 !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1937 atomic_read(&ha->loop_state) != LOOP_DOWN) {
1938
1939 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
1940 ha->host_no));
1941
1942 next_loopid = 0;
1943 list_for_each_entry(fcport, &ha->fcports, list) {
1944 if (fcport->port_type != FCT_TARGET)
1945 continue;
1946
1947 /*
1948 * If the port is not ONLINE then try to login
1949 * to it if we haven't run out of retries.
1950 */
1951 if (atomic_read(&fcport->state) != FCS_ONLINE &&
1952 fcport->login_retry) {
1953
1954 fcport->login_retry--;
1955 if (fcport->flags & FCF_FABRIC_DEVICE) {
1956 if (fcport->flags &
1957 FCF_TAPE_PRESENT)
1958 qla2x00_fabric_logout(
1959 ha,
1960 fcport->loop_id);
1961 status = qla2x00_fabric_login(
1962 ha, fcport, &next_loopid);
1963 } else
1964 status =
1965 qla2x00_local_device_login(
1966 ha, fcport->loop_id);
1967
1968 if (status == QLA_SUCCESS) {
1969 fcport->old_loop_id = fcport->loop_id;
1970
1971 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
1972 ha->host_no, fcport->loop_id));
1973
1974 fcport->port_login_retry_count =
1975 ha->port_down_retry_count * PORT_RETRY_TIME;
1976 atomic_set(&fcport->state, FCS_ONLINE);
1977 atomic_set(&fcport->port_down_timer,
1978 ha->port_down_retry_count * PORT_RETRY_TIME);
1979
1980 fcport->login_retry = 0;
1981 } else if (status == 1) {
1982 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1983 /* retry the login again */
1984 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
1985 ha->host_no,
1986 fcport->login_retry, fcport->loop_id));
1987 } else {
1988 fcport->login_retry = 0;
1989 }
1990 }
1991 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
1992 break;
1993 }
1994 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
1995 ha->host_no));
1996 }
1997
1998 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
1999 atomic_read(&ha->loop_state) != LOOP_DOWN) {
2000
2001 clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
2002 DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
2003 ha->host_no));
2004
2005 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2006
2007 DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2008 ha->host_no));
2009 }
2010
2011 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2012
2013 DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2014 ha->host_no));
2015
2016 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2017 &ha->dpc_flags))) {
2018
2019 qla2x00_loop_resync(ha);
2020
2021 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2022 }
2023
2024 DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2025 ha->host_no));
2026 }
2027
2028 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2029
2030 DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2031 ha->host_no));
2032
2033 qla2x00_rescan_fcports(ha);
2034
2035 DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2036 "end.\n",
2037 ha->host_no));
2038 }
2039
2040 if (!ha->interrupts_on)
2041 qla2x00_enable_intrs(ha);
2042
2043 ha->dpc_active = 0;
2044 } /* End of while(1) */
2045
2046 DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2047
2048 /*
2049 * Make sure that nobody tries to wake us up again.
2050 */
2051 ha->dpc_wait = NULL;
2052 ha->dpc_active = 0;
2053
2054 complete_and_exit(&ha->dpc_exited, 0);
2055 }
2056
2057 /*
2058 * qla2x00_rst_aen
2059 * Processes asynchronous reset.
2060 *
2061 * Input:
2062 * ha = adapter block pointer.
2063 */
2064 static void
2065 qla2x00_rst_aen(scsi_qla_host_t *ha)
2066 {
2067 if (ha->flags.online && !ha->flags.reset_active &&
2068 !atomic_read(&ha->loop_down_timer) &&
2069 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2070 do {
2071 clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2072
2073 /*
2074 * Issue marker command only when we are going to start
2075 * the I/O.
2076 */
2077 ha->marker_needed = 1;
2078 } while (!atomic_read(&ha->loop_down_timer) &&
2079 (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2080 }
2081 }
2082
2083
2084 /*
2085 * This routine will allocate SP from the free queue
2086 * input:
2087 * scsi_qla_host_t *
2088 * output:
2089 * srb_t * or NULL
2090 */
2091 static srb_t *
2092 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2093 {
2094 srb_t *sp;
2095
2096 sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2097 if (sp)
2098 atomic_set(&sp->ref_count, 1);
2099 return (sp);
2100 }
2101
2102 static void
2103 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2104 {
2105 struct scsi_cmnd *cmd = sp->cmd;
2106
2107 if (sp->flags & SRB_DMA_VALID) {
2108 if (cmd->use_sg) {
2109 dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2110 cmd->use_sg, cmd->sc_data_direction);
2111 } else if (cmd->request_bufflen) {
2112 dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2113 cmd->request_bufflen, cmd->sc_data_direction);
2114 }
2115 sp->flags &= ~SRB_DMA_VALID;
2116 }
2117 }
2118
2119 void
2120 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2121 {
2122 struct scsi_cmnd *cmd = sp->cmd;
2123
2124 qla2x00_sp_free_dma(ha, sp);
2125
2126 CMD_SP(cmd) = NULL;
2127 mempool_free(sp, ha->srb_mempool);
2128
2129 cmd->scsi_done(cmd);
2130 }
2131
2132 /**************************************************************************
2133 * qla2x00_timer
2134 *
2135 * Description:
2136 * One second timer
2137 *
2138 * Context: Interrupt
2139 ***************************************************************************/
2140 static void
2141 qla2x00_timer(scsi_qla_host_t *ha)
2142 {
2143 unsigned long cpu_flags = 0;
2144 fc_port_t *fcport;
2145 int start_dpc = 0;
2146 int index;
2147 srb_t *sp;
2148 int t;
2149
2150 /*
2151 * Ports - Port down timer.
2152 *
2153 * Whenever, a port is in the LOST state we start decrementing its port
2154 * down timer every second until it reaches zero. Once it reaches zero
2155 * the port it marked DEAD.
2156 */
2157 t = 0;
2158 list_for_each_entry(fcport, &ha->fcports, list) {
2159 if (fcport->port_type != FCT_TARGET)
2160 continue;
2161
2162 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2163
2164 if (atomic_read(&fcport->port_down_timer) == 0)
2165 continue;
2166
2167 if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2168 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2169
2170 DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2171 "%d remainning\n",
2172 ha->host_no,
2173 t, atomic_read(&fcport->port_down_timer)));
2174 }
2175 t++;
2176 } /* End of for fcport */
2177
2178
2179 /* Loop down handler. */
2180 if (atomic_read(&ha->loop_down_timer) > 0 &&
2181 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2182
2183 if (atomic_read(&ha->loop_down_timer) ==
2184 ha->loop_down_abort_time) {
2185
2186 DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2187 "queues before time expire\n",
2188 ha->host_no));
2189
2190 if (!IS_QLA2100(ha) && ha->link_down_timeout)
2191 atomic_set(&ha->loop_state, LOOP_DEAD);
2192
2193 /* Schedule an ISP abort to return any tape commands. */
2194 spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2195 for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2196 index++) {
2197 fc_port_t *sfcp;
2198
2199 sp = ha->outstanding_cmds[index];
2200 if (!sp)
2201 continue;
2202 sfcp = sp->fcport;
2203 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2204 continue;
2205
2206 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2207 break;
2208 }
2209 spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2210
2211 set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2212 start_dpc++;
2213 }
2214
2215 /* if the loop has been down for 4 minutes, reinit adapter */
2216 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2217 DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2218 "restarting queues.\n",
2219 ha->host_no));
2220
2221 set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2222 start_dpc++;
2223
2224 if (!(ha->device_flags & DFLG_NO_CABLE)) {
2225 DEBUG(printk("scsi(%ld): Loop down - "
2226 "aborting ISP.\n",
2227 ha->host_no));
2228 qla_printk(KERN_WARNING, ha,
2229 "Loop down - aborting ISP.\n");
2230
2231 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2232 }
2233 }
2234 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2235 ha->host_no,
2236 atomic_read(&ha->loop_down_timer)));
2237 }
2238
2239 /* Schedule the DPC routine if needed */
2240 if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2241 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2242 start_dpc ||
2243 test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2244 test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2245 test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2246 ha->dpc_wait && !ha->dpc_active) {
2247
2248 up(ha->dpc_wait);
2249 }
2250
2251 qla2x00_restart_timer(ha, WATCH_INTERVAL);
2252 }
2253
2254 /* XXX(hch): crude hack to emulate a down_timeout() */
2255 int
2256 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2257 {
2258 const unsigned int step = HZ/10;
2259
2260 do {
2261 if (!down_trylock(sema))
2262 return 0;
2263 set_current_state(TASK_INTERRUPTIBLE);
2264 if (schedule_timeout(step))
2265 break;
2266 } while ((timeout -= step) > 0);
2267
2268 return -ETIMEDOUT;
2269 }
2270
2271 /**
2272 * qla2x00_module_init - Module initialization.
2273 **/
2274 static int __init
2275 qla2x00_module_init(void)
2276 {
2277 /* Allocate cache for SRBs. */
2278 srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
2279 SLAB_HWCACHE_ALIGN, NULL, NULL);
2280 if (srb_cachep == NULL) {
2281 printk(KERN_ERR
2282 "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2283 return -ENOMEM;
2284 }
2285
2286 /* Derive version string. */
2287 strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2288 #if DEBUG_QLA2100
2289 strcat(qla2x00_version_str, "-debug");
2290 #endif
2291 qla2xxx_transport_template =
2292 fc_attach_transport(&qla2xxx_transport_functions);
2293 if (!qla2xxx_transport_template)
2294 return -ENODEV;
2295
2296 printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2297 return 0;
2298 }
2299
2300 /**
2301 * qla2x00_module_exit - Module cleanup.
2302 **/
2303 static void __exit
2304 qla2x00_module_exit(void)
2305 {
2306 kmem_cache_destroy(srb_cachep);
2307 fc_release_transport(qla2xxx_transport_template);
2308 }
2309
2310 module_init(qla2x00_module_init);
2311 module_exit(qla2x00_module_exit);
2312
2313 MODULE_AUTHOR("QLogic Corporation");
2314 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2315 MODULE_LICENSE("GPL");
2316 MODULE_VERSION(QLA2XXX_VERSION);
Linux kernel - Deliverables
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