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[PATCH] w1: new family structure.
[linux-2.6/verdex.git] / drivers / scsi / qla2xxx / qla_os.c
blob0b12498b7672b895dd913ec113104b1f5b29165d
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 unsigned long flags;
469
470 if (!CMD_SP(cmd))
471 return FAILED;
472
473 ret = FAILED;
474
475 id = cmd->device->id;
476 lun = cmd->device->lun;
477 serial = cmd->serial_number;
478
479 /* Check active list for command command. */
480 spin_lock_irqsave(&ha->hardware_lock, flags);
481 for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
482 sp = ha->outstanding_cmds[i];
483
484 if (sp == NULL)
485 continue;
486
487 if (sp->cmd != cmd)
488 continue;
489
490 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
491 "sp->state=%x\n", __func__, ha->host_no, sp, serial,
492 sp->state));
493 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
494
495 spin_unlock_irqrestore(&ha->hardware_lock, flags);
496 if (qla2x00_abort_command(ha, sp)) {
497 DEBUG2(printk("%s(%ld): abort_command "
498 "mbx failed.\n", __func__, ha->host_no));
499 } else {
500 DEBUG3(printk("%s(%ld): abort_command "
501 "mbx success.\n", __func__, ha->host_no));
502 ret = SUCCESS;
503 }
504 spin_lock_irqsave(&ha->hardware_lock, flags);
505
506 break;
507 }
508 spin_unlock_irqrestore(&ha->hardware_lock, flags);
509
510 /* Wait for the command to be returned. */
511 if (ret == SUCCESS) {
512 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
513 qla_printk(KERN_ERR, ha,
514 "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
515 "%x.\n", ha->host_no, id, lun, serial, ret);
516 }
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 unsigned long flags;
548
549 status = 0;
550
551 /*
552 * Waiting for all commands for the designated target in the active
553 * array
554 */
555 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
556 spin_lock_irqsave(&ha->hardware_lock, flags);
557 sp = ha->outstanding_cmds[cnt];
558 if (sp) {
559 cmd = sp->cmd;
560 spin_unlock_irqrestore(&ha->hardware_lock, flags);
561 if (cmd->device->id == t) {
562 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
563 status = 1;
564 break;
565 }
566 }
567 } else {
568 spin_unlock_irqrestore(&ha->hardware_lock, flags);
569 }
570 }
571 return (status);
572 }
573
574
575 /**************************************************************************
576 * qla2xxx_eh_device_reset
577 *
578 * Description:
579 * The device reset function will reset the target and abort any
580 * executing commands.
581 *
582 * NOTE: The use of SP is undefined within this context. Do *NOT*
583 * attempt to use this value, even if you determine it is
584 * non-null.
585 *
586 * Input:
587 * cmd = Linux SCSI command packet of the command that cause the
588 * bus device reset.
589 *
590 * Returns:
591 * SUCCESS/FAILURE (defined as macro in scsi.h).
592 *
593 **************************************************************************/
594 int
595 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
596 {
597 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
598 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
599 srb_t *sp;
600 int ret;
601 unsigned int id, lun;
602 unsigned long serial;
603
604 ret = FAILED;
605
606 id = cmd->device->id;
607 lun = cmd->device->lun;
608 serial = cmd->serial_number;
609
610 sp = (srb_t *) CMD_SP(cmd);
611 if (!sp || !fcport)
612 return ret;
613
614 qla_printk(KERN_INFO, ha,
615 "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
616
617 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
618 goto eh_dev_reset_done;
619
620 if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
621 if (qla2x00_device_reset(ha, fcport) == 0)
622 ret = SUCCESS;
623
624 #if defined(LOGOUT_AFTER_DEVICE_RESET)
625 if (ret == SUCCESS) {
626 if (fcport->flags & FC_FABRIC_DEVICE) {
627 qla2x00_fabric_logout(ha, fcport->loop_id);
628 qla2x00_mark_device_lost(ha, fcport);
629 }
630 }
631 #endif
632 } else {
633 DEBUG2(printk(KERN_INFO
634 "%s failed: loop not ready\n",__func__);)
635 }
636
637 if (ret == FAILED) {
638 DEBUG3(printk("%s(%ld): device reset failed\n",
639 __func__, ha->host_no));
640 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
641 __func__);
642
643 goto eh_dev_reset_done;
644 }
645
646 /*
647 * If we are coming down the EH path, wait for all commands to
648 * complete for the device.
649 */
650 if (cmd->device->host->eh_active) {
651 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
652 ret = FAILED;
653
654 if (ret == FAILED) {
655 DEBUG3(printk("%s(%ld): failed while waiting for "
656 "commands\n", __func__, ha->host_no));
657 qla_printk(KERN_INFO, ha,
658 "%s: failed while waiting for commands\n",
659 __func__);
660
661 goto eh_dev_reset_done;
662 }
663 }
664
665 qla_printk(KERN_INFO, ha,
666 "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
667
668 eh_dev_reset_done:
669 return ret;
670 }
671
672 /**************************************************************************
673 * qla2x00_eh_wait_for_pending_commands
674 *
675 * Description:
676 * Waits for all the commands to come back from the specified host.
677 *
678 * Input:
679 * ha - pointer to scsi_qla_host structure.
680 *
681 * Returns:
682 * 1 : SUCCESS
683 * 0 : FAILED
684 *
685 * Note:
686 **************************************************************************/
687 static int
688 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
689 {
690 int cnt;
691 int status;
692 srb_t *sp;
693 struct scsi_cmnd *cmd;
694 unsigned long flags;
695
696 status = 1;
697
698 /*
699 * Waiting for all commands for the designated target in the active
700 * array
701 */
702 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
703 spin_lock_irqsave(&ha->hardware_lock, flags);
704 sp = ha->outstanding_cmds[cnt];
705 if (sp) {
706 cmd = sp->cmd;
707 spin_unlock_irqrestore(&ha->hardware_lock, flags);
708 status = qla2x00_eh_wait_on_command(ha, cmd);
709 if (status == 0)
710 break;
711 }
712 else {
713 spin_unlock_irqrestore(&ha->hardware_lock, flags);
714 }
715 }
716 return (status);
717 }
718
719
720 /**************************************************************************
721 * qla2xxx_eh_bus_reset
722 *
723 * Description:
724 * The bus reset function will reset the bus and abort any executing
725 * commands.
726 *
727 * Input:
728 * cmd = Linux SCSI command packet of the command that cause the
729 * bus reset.
730 *
731 * Returns:
732 * SUCCESS/FAILURE (defined as macro in scsi.h).
733 *
734 **************************************************************************/
735 int
736 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
737 {
738 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
739 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
740 srb_t *sp;
741 int ret;
742 unsigned int id, lun;
743 unsigned long serial;
744
745 ret = FAILED;
746
747 id = cmd->device->id;
748 lun = cmd->device->lun;
749 serial = cmd->serial_number;
750
751 sp = (srb_t *) CMD_SP(cmd);
752 if (!sp || !fcport)
753 return ret;
754
755 qla_printk(KERN_INFO, ha,
756 "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
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 return ret;
780 }
781
782 /**************************************************************************
783 * qla2xxx_eh_host_reset
784 *
785 * Description:
786 * The reset function will reset the Adapter.
787 *
788 * Input:
789 * cmd = Linux SCSI command packet of the command that cause the
790 * adapter reset.
791 *
792 * Returns:
793 * Either SUCCESS or FAILED.
794 *
795 * Note:
796 **************************************************************************/
797 int
798 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
799 {
800 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
801 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
802 srb_t *sp;
803 int ret;
804 unsigned int id, lun;
805 unsigned long serial;
806
807 ret = FAILED;
808
809 id = cmd->device->id;
810 lun = cmd->device->lun;
811 serial = cmd->serial_number;
812
813 sp = (srb_t *) CMD_SP(cmd);
814 if (!sp || !fcport)
815 return ret;
816
817 qla_printk(KERN_INFO, ha,
818 "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
819
820 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
821 goto eh_host_reset_lock;
822
823 /*
824 * Fixme-may be dpc thread is active and processing
825 * loop_resync,so wait a while for it to
826 * be completed and then issue big hammer.Otherwise
827 * it may cause I/O failure as big hammer marks the
828 * devices as lost kicking of the port_down_timer
829 * while dpc is stuck for the mailbox to complete.
830 */
831 qla2x00_wait_for_loop_ready(ha);
832 set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
833 if (qla2x00_abort_isp(ha)) {
834 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
835 /* failed. schedule dpc to try */
836 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
837
838 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
839 goto eh_host_reset_lock;
840 }
841 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
842
843 /* Waiting for our command in done_queue to be returned to OS.*/
844 if (qla2x00_eh_wait_for_pending_commands(ha))
845 ret = SUCCESS;
846
847 eh_host_reset_lock:
848 qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
849 (ret == FAILED) ? "failed" : "succeded");
850
851 return ret;
852 }
853
854 /*
855 * qla2x00_loop_reset
856 * Issue loop reset.
857 *
858 * Input:
859 * ha = adapter block pointer.
860 *
861 * Returns:
862 * 0 = success
863 */
864 static int
865 qla2x00_loop_reset(scsi_qla_host_t *ha)
866 {
867 int status = QLA_SUCCESS;
868 struct fc_port *fcport;
869
870 if (ha->flags.enable_lip_reset) {
871 status = qla2x00_lip_reset(ha);
872 }
873
874 if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
875 list_for_each_entry(fcport, &ha->fcports, list) {
876 if (fcport->port_type != FCT_TARGET)
877 continue;
878
879 status = qla2x00_target_reset(ha, fcport);
880 if (status != QLA_SUCCESS)
881 break;
882 }
883 }
884
885 if (status == QLA_SUCCESS &&
886 ((!ha->flags.enable_target_reset &&
887 !ha->flags.enable_lip_reset) ||
888 ha->flags.enable_lip_full_login)) {
889
890 status = qla2x00_full_login_lip(ha);
891 }
892
893 /* Issue marker command only when we are going to start the I/O */
894 ha->marker_needed = 1;
895
896 if (status) {
897 /* Empty */
898 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
899 __func__,
900 ha->host_no);)
901 } else {
902 /* Empty */
903 DEBUG3(printk("%s(%ld): exiting normally.\n",
904 __func__,
905 ha->host_no);)
906 }
907
908 return(status);
909 }
910
911 /*
912 * qla2x00_device_reset
913 * Issue bus device reset message to the target.
914 *
915 * Input:
916 * ha = adapter block pointer.
917 * t = SCSI ID.
918 * TARGET_QUEUE_LOCK must be released.
919 * ADAPTER_STATE_LOCK must be released.
920 *
921 * Context:
922 * Kernel context.
923 */
924 static int
925 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
926 {
927 /* Abort Target command will clear Reservation */
928 return qla2x00_abort_target(reset_fcport);
929 }
930
931 static int
932 qla2xxx_slave_alloc(struct scsi_device *sdev)
933 {
934 scsi_qla_host_t *ha = to_qla_host(sdev->host);
935 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
936 fc_port_t *fcport;
937 int found;
938
939 if (!rport)
940 return -ENXIO;
941
942 found = 0;
943 list_for_each_entry(fcport, &ha->fcports, list) {
944 if (rport->port_name ==
945 be64_to_cpu(*(uint64_t *)fcport->port_name)) {
946 found++;
947 break;
948 }
949 }
950 if (!found)
951 return -ENXIO;
952
953 sdev->hostdata = fcport;
954
955 return 0;
956 }
957
958 static int
959 qla2xxx_slave_configure(struct scsi_device *sdev)
960 {
961 scsi_qla_host_t *ha = to_qla_host(sdev->host);
962 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
963
964 if (sdev->tagged_supported)
965 scsi_activate_tcq(sdev, 32);
966 else
967 scsi_deactivate_tcq(sdev, 32);
968
969 rport->dev_loss_tmo = ha->port_down_retry_count + 5;
970
971 return 0;
972 }
973
974 static void
975 qla2xxx_slave_destroy(struct scsi_device *sdev)
976 {
977 sdev->hostdata = NULL;
978 }
979
980 /**
981 * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
982 * @ha: HA context
983 *
984 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
985 * supported addressing method.
986 */
987 static void
988 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
989 {
990 /* Assume 32bit DMA address */
991 ha->flags.enable_64bit_addressing = 0;
992 ha->calc_request_entries = qla2x00_calc_iocbs_32;
993 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
994
995 /*
996 * Given the two variants pci_set_dma_mask(), allow the compiler to
997 * assist in setting the proper dma mask.
998 */
999 if (sizeof(dma_addr_t) > 4) {
1000 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1001 ha->flags.enable_64bit_addressing = 1;
1002 ha->calc_request_entries = qla2x00_calc_iocbs_64;
1003 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
1004
1005 if (pci_set_consistent_dma_mask(ha->pdev,
1006 DMA_64BIT_MASK)) {
1007 qla_printk(KERN_DEBUG, ha,
1008 "Failed to set 64 bit PCI consistent mask; "
1009 "using 32 bit.\n");
1010 pci_set_consistent_dma_mask(ha->pdev,
1011 DMA_32BIT_MASK);
1012 }
1013 } else {
1014 qla_printk(KERN_DEBUG, ha,
1015 "Failed to set 64 bit PCI DMA mask, falling back "
1016 "to 32 bit MASK.\n");
1017 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1018 }
1019 } else {
1020 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1021 }
1022 }
1023
1024 static int
1025 qla2x00_iospace_config(scsi_qla_host_t *ha)
1026 {
1027 unsigned long pio, pio_len, pio_flags;
1028 unsigned long mmio, mmio_len, mmio_flags;
1029
1030 /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1031 pio = pci_resource_start(ha->pdev, 0);
1032 pio_len = pci_resource_len(ha->pdev, 0);
1033 pio_flags = pci_resource_flags(ha->pdev, 0);
1034 if (pio_flags & IORESOURCE_IO) {
1035 if (pio_len < MIN_IOBASE_LEN) {
1036 qla_printk(KERN_WARNING, ha,
1037 "Invalid PCI I/O region size (%s)...\n",
1038 pci_name(ha->pdev));
1039 pio = 0;
1040 }
1041 } else {
1042 qla_printk(KERN_WARNING, ha,
1043 "region #0 not a PIO resource (%s)...\n",
1044 pci_name(ha->pdev));
1045 pio = 0;
1046 }
1047
1048 /* Use MMIO operations for all accesses. */
1049 mmio = pci_resource_start(ha->pdev, 1);
1050 mmio_len = pci_resource_len(ha->pdev, 1);
1051 mmio_flags = pci_resource_flags(ha->pdev, 1);
1052
1053 if (!(mmio_flags & IORESOURCE_MEM)) {
1054 qla_printk(KERN_ERR, ha,
1055 "region #0 not an MMIO resource (%s), aborting\n",
1056 pci_name(ha->pdev));
1057 goto iospace_error_exit;
1058 }
1059 if (mmio_len < MIN_IOBASE_LEN) {
1060 qla_printk(KERN_ERR, ha,
1061 "Invalid PCI mem region size (%s), aborting\n",
1062 pci_name(ha->pdev));
1063 goto iospace_error_exit;
1064 }
1065
1066 if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1067 qla_printk(KERN_WARNING, ha,
1068 "Failed to reserve PIO/MMIO regions (%s)\n",
1069 pci_name(ha->pdev));
1070
1071 goto iospace_error_exit;
1072 }
1073
1074 ha->pio_address = pio;
1075 ha->pio_length = pio_len;
1076 ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1077 if (!ha->iobase) {
1078 qla_printk(KERN_ERR, ha,
1079 "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1080
1081 goto iospace_error_exit;
1082 }
1083
1084 return (0);
1085
1086 iospace_error_exit:
1087 return (-ENOMEM);
1088 }
1089
1090 /*
1091 * PCI driver interface
1092 */
1093 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1094 {
1095 int ret = -ENODEV;
1096 device_reg_t __iomem *reg;
1097 struct Scsi_Host *host;
1098 scsi_qla_host_t *ha;
1099 unsigned long flags = 0;
1100 unsigned long wait_switch = 0;
1101 char pci_info[20];
1102 char fw_str[30];
1103 fc_port_t *fcport;
1104
1105 if (pci_enable_device(pdev))
1106 goto probe_out;
1107
1108 host = scsi_host_alloc(&qla2x00_driver_template,
1109 sizeof(scsi_qla_host_t));
1110 if (host == NULL) {
1111 printk(KERN_WARNING
1112 "qla2xxx: Couldn't allocate host from scsi layer!\n");
1113 goto probe_disable_device;
1114 }
1115
1116 /* Clear our data area */
1117 ha = (scsi_qla_host_t *)host->hostdata;
1118 memset(ha, 0, sizeof(scsi_qla_host_t));
1119
1120 ha->pdev = pdev;
1121 ha->host = host;
1122 ha->host_no = host->host_no;
1123 ha->brd_info = brd_info;
1124 sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1125
1126 /* Configure PCI I/O space */
1127 ret = qla2x00_iospace_config(ha);
1128 if (ret)
1129 goto probe_failed;
1130
1131 /* Sanitize the information from PCI BIOS. */
1132 host->irq = pdev->irq;
1133
1134 qla_printk(KERN_INFO, ha,
1135 "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1136 host->irq, ha->iobase);
1137
1138 spin_lock_init(&ha->hardware_lock);
1139
1140 ha->prev_topology = 0;
1141 ha->ports = MAX_BUSES;
1142
1143 if (IS_QLA2100(ha)) {
1144 host->max_id = MAX_TARGETS_2100;
1145 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1146 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1147 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1148 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1149 host->sg_tablesize = 32;
1150 } else if (IS_QLA2200(ha)) {
1151 host->max_id = MAX_TARGETS_2200;
1152 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1153 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1154 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1155 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1156 } else /*if (IS_QLA2300(ha))*/ {
1157 host->max_id = MAX_TARGETS_2200;
1158 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1159 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1160 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1161 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1162 }
1163 host->can_queue = ha->request_q_length + 128;
1164
1165 /* load the F/W, read paramaters, and init the H/W */
1166 ha->instance = num_hosts;
1167
1168 init_MUTEX(&ha->mbx_cmd_sem);
1169 init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1170
1171 INIT_LIST_HEAD(&ha->list);
1172 INIT_LIST_HEAD(&ha->fcports);
1173 INIT_LIST_HEAD(&ha->rscn_fcports);
1174
1175 /*
1176 * These locks are used to prevent more than one CPU
1177 * from modifying the queue at the same time. The
1178 * higher level "host_lock" will reduce most
1179 * contention for these locks.
1180 */
1181 spin_lock_init(&ha->mbx_reg_lock);
1182
1183 ha->dpc_pid = -1;
1184 init_completion(&ha->dpc_inited);
1185 init_completion(&ha->dpc_exited);
1186
1187 qla2x00_config_dma_addressing(ha);
1188 if (qla2x00_mem_alloc(ha)) {
1189 qla_printk(KERN_WARNING, ha,
1190 "[ERROR] Failed to allocate memory for adapter\n");
1191
1192 ret = -ENOMEM;
1193 goto probe_failed;
1194 }
1195
1196 if (qla2x00_initialize_adapter(ha) &&
1197 !(ha->device_flags & DFLG_NO_CABLE)) {
1198
1199 qla_printk(KERN_WARNING, ha,
1200 "Failed to initialize adapter\n");
1201
1202 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1203 "Adapter flags %x.\n",
1204 ha->host_no, ha->device_flags));
1205
1206 ret = -ENODEV;
1207 goto probe_failed;
1208 }
1209
1210 /*
1211 * Startup the kernel thread for this host adapter
1212 */
1213 ha->dpc_should_die = 0;
1214 ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1215 if (ha->dpc_pid < 0) {
1216 qla_printk(KERN_WARNING, ha,
1217 "Unable to start DPC thread!\n");
1218
1219 ret = -ENODEV;
1220 goto probe_failed;
1221 }
1222 wait_for_completion(&ha->dpc_inited);
1223
1224 host->this_id = 255;
1225 host->cmd_per_lun = 3;
1226 host->unique_id = ha->instance;
1227 host->max_cmd_len = MAX_CMDSZ;
1228 host->max_channel = ha->ports - 1;
1229 host->max_lun = MAX_LUNS;
1230 host->transportt = qla2xxx_transport_template;
1231
1232 if (IS_QLA2100(ha) || IS_QLA2200(ha))
1233 ret = request_irq(host->irq, qla2100_intr_handler,
1234 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1235 else
1236 ret = request_irq(host->irq, qla2300_intr_handler,
1237 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1238 if (ret) {
1239 qla_printk(KERN_WARNING, ha,
1240 "Failed to reserve interrupt %d already in use.\n",
1241 host->irq);
1242 goto probe_failed;
1243 }
1244
1245 /* Initialized the timer */
1246 qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1247
1248 DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1249 ha->host_no, ha));
1250
1251 reg = ha->iobase;
1252
1253 /* Disable ISP interrupts. */
1254 qla2x00_disable_intrs(ha);
1255
1256 /* Ensure mailbox registers are free. */
1257 spin_lock_irqsave(&ha->hardware_lock, flags);
1258 WRT_REG_WORD(&reg->semaphore, 0);
1259 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1260 WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1261
1262 /* Enable proper parity */
1263 if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1264 if (IS_QLA2300(ha))
1265 /* SRAM parity */
1266 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1267 else
1268 /* SRAM, Instruction RAM and GP RAM parity */
1269 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1270 }
1271 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1272
1273 /* Enable chip interrupts. */
1274 qla2x00_enable_intrs(ha);
1275
1276 /* v2.19.5b6 */
1277 /*
1278 * Wait around max loop_reset_delay secs for the devices to come
1279 * on-line. We don't want Linux scanning before we are ready.
1280 *
1281 */
1282 for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1283 time_before(jiffies,wait_switch) &&
1284 !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1285 && (ha->device_flags & SWITCH_FOUND) ;) {
1286
1287 qla2x00_check_fabric_devices(ha);
1288
1289 msleep(10);
1290 }
1291
1292 pci_set_drvdata(pdev, ha);
1293 ha->flags.init_done = 1;
1294 num_hosts++;
1295
1296 ret = scsi_add_host(host, &pdev->dev);
1297 if (ret)
1298 goto probe_failed;
1299
1300 qla2x00_alloc_sysfs_attr(ha);
1301
1302 qla2x00_init_host_attr(ha);
1303
1304 qla_printk(KERN_INFO, ha, "\n"
1305 " QLogic Fibre Channel HBA Driver: %s\n"
1306 " QLogic %s - %s\n"
1307 " %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1308 ha->model_number, ha->model_desc ? ha->model_desc: "",
1309 ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
1310 pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1311 ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
1312
1313 /* Go with fc_rport registration. */
1314 list_for_each_entry(fcport, &ha->fcports, list)
1315 qla2x00_reg_remote_port(ha, fcport);
1316
1317 return 0;
1318
1319 probe_failed:
1320 fc_remove_host(ha->host);
1321
1322 qla2x00_free_device(ha);
1323
1324 scsi_host_put(host);
1325
1326 probe_disable_device:
1327 pci_disable_device(pdev);
1328
1329 probe_out:
1330 return ret;
1331 }
1332 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1333
1334 void qla2x00_remove_one(struct pci_dev *pdev)
1335 {
1336 scsi_qla_host_t *ha;
1337
1338 ha = pci_get_drvdata(pdev);
1339
1340 qla2x00_free_sysfs_attr(ha);
1341
1342 fc_remove_host(ha->host);
1343
1344 scsi_remove_host(ha->host);
1345
1346 qla2x00_free_device(ha);
1347
1348 scsi_host_put(ha->host);
1349
1350 pci_set_drvdata(pdev, NULL);
1351 }
1352 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1353
1354 static void
1355 qla2x00_free_device(scsi_qla_host_t *ha)
1356 {
1357 int ret;
1358
1359 /* Abort any outstanding IO descriptors. */
1360 if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1361 qla2x00_cancel_io_descriptors(ha);
1362
1363 /* turn-off interrupts on the card */
1364 if (ha->interrupts_on)
1365 qla2x00_disable_intrs(ha);
1366
1367 /* Disable timer */
1368 if (ha->timer_active)
1369 qla2x00_stop_timer(ha);
1370
1371 /* Kill the kernel thread for this host */
1372 if (ha->dpc_pid >= 0) {
1373 ha->dpc_should_die = 1;
1374 wmb();
1375 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1376 if (ret) {
1377 qla_printk(KERN_ERR, ha,
1378 "Unable to signal DPC thread -- (%d)\n", ret);
1379
1380 /* TODO: SOMETHING MORE??? */
1381 } else {
1382 wait_for_completion(&ha->dpc_exited);
1383 }
1384 }
1385
1386 qla2x00_mem_free(ha);
1387
1388
1389 ha->flags.online = 0;
1390
1391 /* Detach interrupts */
1392 if (ha->pdev->irq)
1393 free_irq(ha->pdev->irq, ha);
1394
1395 /* release io space registers */
1396 if (ha->iobase)
1397 iounmap(ha->iobase);
1398 pci_release_regions(ha->pdev);
1399
1400 pci_disable_device(ha->pdev);
1401 }
1402
1403 /*
1404 * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1405 *
1406 * Input: ha = adapter block pointer. fcport = port structure pointer.
1407 *
1408 * Return: None.
1409 *
1410 * Context:
1411 */
1412 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1413 int do_login)
1414 {
1415 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1416 fc_remote_port_block(fcport->rport);
1417 /*
1418 * We may need to retry the login, so don't change the state of the
1419 * port but do the retries.
1420 */
1421 if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1422 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1423
1424 if (!do_login)
1425 return;
1426
1427 if (fcport->login_retry == 0) {
1428 fcport->login_retry = ha->login_retry_count;
1429 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1430
1431 DEBUG(printk("scsi(%ld): Port login retry: "
1432 "%02x%02x%02x%02x%02x%02x%02x%02x, "
1433 "id = 0x%04x retry cnt=%d\n",
1434 ha->host_no,
1435 fcport->port_name[0],
1436 fcport->port_name[1],
1437 fcport->port_name[2],
1438 fcport->port_name[3],
1439 fcport->port_name[4],
1440 fcport->port_name[5],
1441 fcport->port_name[6],
1442 fcport->port_name[7],
1443 fcport->loop_id,
1444 fcport->login_retry));
1445 }
1446 }
1447
1448 /*
1449 * qla2x00_mark_all_devices_lost
1450 * Updates fcport state when device goes offline.
1451 *
1452 * Input:
1453 * ha = adapter block pointer.
1454 * fcport = port structure pointer.
1455 *
1456 * Return:
1457 * None.
1458 *
1459 * Context:
1460 */
1461 void
1462 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1463 {
1464 fc_port_t *fcport;
1465
1466 list_for_each_entry(fcport, &ha->fcports, list) {
1467 if (fcport->port_type != FCT_TARGET)
1468 continue;
1469
1470 /*
1471 * No point in marking the device as lost, if the device is
1472 * already DEAD.
1473 */
1474 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1475 continue;
1476 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1477 fc_remote_port_block(fcport->rport);
1478 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1479 }
1480 }
1481
1482 /*
1483 * qla2x00_mem_alloc
1484 * Allocates adapter memory.
1485 *
1486 * Returns:
1487 * 0 = success.
1488 * 1 = failure.
1489 */
1490 static uint8_t
1491 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1492 {
1493 char name[16];
1494 uint8_t status = 1;
1495 int retry= 10;
1496
1497 do {
1498 /*
1499 * This will loop only once if everything goes well, else some
1500 * number of retries will be performed to get around a kernel
1501 * bug where available mem is not allocated until after a
1502 * little delay and a retry.
1503 */
1504 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1505 (ha->request_q_length + 1) * sizeof(request_t),
1506 &ha->request_dma, GFP_KERNEL);
1507 if (ha->request_ring == NULL) {
1508 qla_printk(KERN_WARNING, ha,
1509 "Memory Allocation failed - request_ring\n");
1510
1511 qla2x00_mem_free(ha);
1512 msleep(100);
1513
1514 continue;
1515 }
1516
1517 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1518 (ha->response_q_length + 1) * sizeof(response_t),
1519 &ha->response_dma, GFP_KERNEL);
1520 if (ha->response_ring == NULL) {
1521 qla_printk(KERN_WARNING, ha,
1522 "Memory Allocation failed - response_ring\n");
1523
1524 qla2x00_mem_free(ha);
1525 msleep(100);
1526
1527 continue;
1528 }
1529
1530 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1531 &ha->gid_list_dma, GFP_KERNEL);
1532 if (ha->gid_list == NULL) {
1533 qla_printk(KERN_WARNING, ha,
1534 "Memory Allocation failed - gid_list\n");
1535
1536 qla2x00_mem_free(ha);
1537 msleep(100);
1538
1539 continue;
1540 }
1541
1542 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1543 sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1544 if (ha->rlc_rsp == NULL) {
1545 qla_printk(KERN_WARNING, ha,
1546 "Memory Allocation failed - rlc");
1547
1548 qla2x00_mem_free(ha);
1549 msleep(100);
1550
1551 continue;
1552 }
1553
1554 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1555 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1556 DMA_POOL_SIZE, 8, 0);
1557 if (ha->s_dma_pool == NULL) {
1558 qla_printk(KERN_WARNING, ha,
1559 "Memory Allocation failed - s_dma_pool\n");
1560
1561 qla2x00_mem_free(ha);
1562 msleep(100);
1563
1564 continue;
1565 }
1566
1567 /* get consistent memory allocated for init control block */
1568 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1569 &ha->init_cb_dma);
1570 if (ha->init_cb == NULL) {
1571 qla_printk(KERN_WARNING, ha,
1572 "Memory Allocation failed - init_cb\n");
1573
1574 qla2x00_mem_free(ha);
1575 msleep(100);
1576
1577 continue;
1578 }
1579 memset(ha->init_cb, 0, sizeof(init_cb_t));
1580
1581 /* Get consistent memory allocated for Get Port Database cmd */
1582 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1583 &ha->iodesc_pd_dma);
1584 if (ha->iodesc_pd == NULL) {
1585 /* error */
1586 qla_printk(KERN_WARNING, ha,
1587 "Memory Allocation failed - iodesc_pd\n");
1588
1589 qla2x00_mem_free(ha);
1590 msleep(100);
1591
1592 continue;
1593 }
1594 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1595
1596 /* Allocate ioctl related memory. */
1597 if (qla2x00_alloc_ioctl_mem(ha)) {
1598 qla_printk(KERN_WARNING, ha,
1599 "Memory Allocation failed - ioctl_mem\n");
1600
1601 qla2x00_mem_free(ha);
1602 msleep(100);
1603
1604 continue;
1605 }
1606
1607 if (qla2x00_allocate_sp_pool(ha)) {
1608 qla_printk(KERN_WARNING, ha,
1609 "Memory Allocation failed - "
1610 "qla2x00_allocate_sp_pool()\n");
1611
1612 qla2x00_mem_free(ha);
1613 msleep(100);
1614
1615 continue;
1616 }
1617
1618 /* Allocate memory for SNS commands */
1619 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1620 /* Get consistent memory allocated for SNS commands */
1621 ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1622 sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1623 GFP_KERNEL);
1624 if (ha->sns_cmd == NULL) {
1625 /* error */
1626 qla_printk(KERN_WARNING, ha,
1627 "Memory Allocation failed - sns_cmd\n");
1628
1629 qla2x00_mem_free(ha);
1630 msleep(100);
1631
1632 continue;
1633 }
1634 memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1635 } else {
1636 /* Get consistent memory allocated for MS IOCB */
1637 ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1638 &ha->ms_iocb_dma);
1639 if (ha->ms_iocb == NULL) {
1640 /* error */
1641 qla_printk(KERN_WARNING, ha,
1642 "Memory Allocation failed - ms_iocb\n");
1643
1644 qla2x00_mem_free(ha);
1645 msleep(100);
1646
1647 continue;
1648 }
1649 memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1650
1651 /*
1652 * Get consistent memory allocated for CT SNS
1653 * commands
1654 */
1655 ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1656 sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1657 GFP_KERNEL);
1658 if (ha->ct_sns == NULL) {
1659 /* error */
1660 qla_printk(KERN_WARNING, ha,
1661 "Memory Allocation failed - ct_sns\n");
1662
1663 qla2x00_mem_free(ha);
1664 msleep(100);
1665
1666 continue;
1667 }
1668 memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1669 }
1670
1671 /* Done all allocations without any error. */
1672 status = 0;
1673
1674 } while (retry-- && status != 0);
1675
1676 if (status) {
1677 printk(KERN_WARNING
1678 "%s(): **** FAILED ****\n", __func__);
1679 }
1680
1681 return(status);
1682 }
1683
1684 /*
1685 * qla2x00_mem_free
1686 * Frees all adapter allocated memory.
1687 *
1688 * Input:
1689 * ha = adapter block pointer.
1690 */
1691 static void
1692 qla2x00_mem_free(scsi_qla_host_t *ha)
1693 {
1694 struct list_head *fcpl, *fcptemp;
1695 fc_port_t *fcport;
1696 unsigned long wtime;/* max wait time if mbx cmd is busy. */
1697
1698 if (ha == NULL) {
1699 /* error */
1700 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1701 return;
1702 }
1703
1704 /* Make sure all other threads are stopped. */
1705 wtime = 60 * HZ;
1706 while (ha->dpc_wait && wtime) {
1707 set_current_state(TASK_INTERRUPTIBLE);
1708 wtime = schedule_timeout(wtime);
1709 }
1710
1711 /* free ioctl memory */
1712 qla2x00_free_ioctl_mem(ha);
1713
1714 /* free sp pool */
1715 qla2x00_free_sp_pool(ha);
1716
1717 if (ha->sns_cmd)
1718 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1719 ha->sns_cmd, ha->sns_cmd_dma);
1720
1721 if (ha->ct_sns)
1722 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1723 ha->ct_sns, ha->ct_sns_dma);
1724
1725 if (ha->ms_iocb)
1726 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1727
1728 if (ha->iodesc_pd)
1729 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1730
1731 if (ha->init_cb)
1732 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1733
1734 if (ha->s_dma_pool)
1735 dma_pool_destroy(ha->s_dma_pool);
1736
1737 if (ha->rlc_rsp)
1738 dma_free_coherent(&ha->pdev->dev,
1739 sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1740 ha->rlc_rsp_dma);
1741
1742 if (ha->gid_list)
1743 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1744 ha->gid_list_dma);
1745
1746 if (ha->response_ring)
1747 dma_free_coherent(&ha->pdev->dev,
1748 (ha->response_q_length + 1) * sizeof(response_t),
1749 ha->response_ring, ha->response_dma);
1750
1751 if (ha->request_ring)
1752 dma_free_coherent(&ha->pdev->dev,
1753 (ha->request_q_length + 1) * sizeof(request_t),
1754 ha->request_ring, ha->request_dma);
1755
1756 ha->sns_cmd = NULL;
1757 ha->sns_cmd_dma = 0;
1758 ha->ct_sns = NULL;
1759 ha->ct_sns_dma = 0;
1760 ha->ms_iocb = NULL;
1761 ha->ms_iocb_dma = 0;
1762 ha->iodesc_pd = NULL;
1763 ha->iodesc_pd_dma = 0;
1764 ha->init_cb = NULL;
1765 ha->init_cb_dma = 0;
1766
1767 ha->s_dma_pool = NULL;
1768
1769 ha->rlc_rsp = NULL;
1770 ha->rlc_rsp_dma = 0;
1771 ha->gid_list = NULL;
1772 ha->gid_list_dma = 0;
1773
1774 ha->response_ring = NULL;
1775 ha->response_dma = 0;
1776 ha->request_ring = NULL;
1777 ha->request_dma = 0;
1778
1779 list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1780 fcport = list_entry(fcpl, fc_port_t, list);
1781
1782 /* fc ports */
1783 list_del_init(&fcport->list);
1784 kfree(fcport);
1785 }
1786 INIT_LIST_HEAD(&ha->fcports);
1787
1788 if (ha->fw_dump)
1789 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1790
1791 if (ha->fw_dump_buffer)
1792 vfree(ha->fw_dump_buffer);
1793
1794 ha->fw_dump = NULL;
1795 ha->fw_dump_reading = 0;
1796 ha->fw_dump_buffer = NULL;
1797 }
1798
1799 /*
1800 * qla2x00_allocate_sp_pool
1801 * This routine is called during initialization to allocate
1802 * memory for local srb_t.
1803 *
1804 * Input:
1805 * ha = adapter block pointer.
1806 *
1807 * Context:
1808 * Kernel context.
1809 *
1810 * Note: Sets the ref_count for non Null sp to one.
1811 */
1812 static int
1813 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1814 {
1815 int rval;
1816
1817 rval = QLA_SUCCESS;
1818 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1819 mempool_free_slab, srb_cachep);
1820 if (ha->srb_mempool == NULL) {
1821 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1822 rval = QLA_FUNCTION_FAILED;
1823 }
1824 return (rval);
1825 }
1826
1827 /*
1828 * This routine frees all adapter allocated memory.
1829 *
1830 */
1831 static void
1832 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1833 {
1834 if (ha->srb_mempool) {
1835 mempool_destroy(ha->srb_mempool);
1836 ha->srb_mempool = NULL;
1837 }
1838 }
1839
1840 /**************************************************************************
1841 * qla2x00_do_dpc
1842 * This kernel thread is a task that is schedule by the interrupt handler
1843 * to perform the background processing for interrupts.
1844 *
1845 * Notes:
1846 * This task always run in the context of a kernel thread. It
1847 * is kick-off by the driver's detect code and starts up
1848 * up one per adapter. It immediately goes to sleep and waits for
1849 * some fibre event. When either the interrupt handler or
1850 * the timer routine detects a event it will one of the task
1851 * bits then wake us up.
1852 **************************************************************************/
1853 static int
1854 qla2x00_do_dpc(void *data)
1855 {
1856 DECLARE_MUTEX_LOCKED(sem);
1857 scsi_qla_host_t *ha;
1858 fc_port_t *fcport;
1859 uint8_t status;
1860 uint16_t next_loopid;
1861
1862 ha = (scsi_qla_host_t *)data;
1863
1864 lock_kernel();
1865
1866 daemonize("%s_dpc", ha->host_str);
1867 allow_signal(SIGHUP);
1868
1869 ha->dpc_wait = &sem;
1870
1871 set_user_nice(current, -20);
1872
1873 unlock_kernel();
1874
1875 complete(&ha->dpc_inited);
1876
1877 while (1) {
1878 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1879
1880 if (down_interruptible(&sem))
1881 break;
1882
1883 if (ha->dpc_should_die)
1884 break;
1885
1886 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1887
1888 /* Initialization not yet finished. Don't do anything yet. */
1889 if (!ha->flags.init_done || ha->dpc_active)
1890 continue;
1891
1892 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1893
1894 ha->dpc_active = 1;
1895
1896 if (ha->flags.mbox_busy) {
1897 ha->dpc_active = 0;
1898 continue;
1899 }
1900
1901 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1902
1903 DEBUG(printk("scsi(%ld): dpc: sched "
1904 "qla2x00_abort_isp ha = %p\n",
1905 ha->host_no, ha));
1906 if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1907 &ha->dpc_flags))) {
1908
1909 if (qla2x00_abort_isp(ha)) {
1910 /* failed. retry later */
1911 set_bit(ISP_ABORT_NEEDED,
1912 &ha->dpc_flags);
1913 }
1914 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1915 }
1916 DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1917 ha->host_no));
1918 }
1919
1920 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1921 (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1922
1923 DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1924 ha->host_no));
1925
1926 qla2x00_rst_aen(ha);
1927 clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1928 }
1929
1930 /* Retry each device up to login retry count */
1931 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1932 !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1933 atomic_read(&ha->loop_state) != LOOP_DOWN) {
1934
1935 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
1936 ha->host_no));
1937
1938 next_loopid = 0;
1939 list_for_each_entry(fcport, &ha->fcports, list) {
1940 if (fcport->port_type != FCT_TARGET)
1941 continue;
1942
1943 /*
1944 * If the port is not ONLINE then try to login
1945 * to it if we haven't run out of retries.
1946 */
1947 if (atomic_read(&fcport->state) != FCS_ONLINE &&
1948 fcport->login_retry) {
1949
1950 fcport->login_retry--;
1951 if (fcport->flags & FCF_FABRIC_DEVICE) {
1952 if (fcport->flags &
1953 FCF_TAPE_PRESENT)
1954 qla2x00_fabric_logout(
1955 ha,
1956 fcport->loop_id);
1957 status = qla2x00_fabric_login(
1958 ha, fcport, &next_loopid);
1959 } else
1960 status =
1961 qla2x00_local_device_login(
1962 ha, fcport->loop_id);
1963
1964 if (status == QLA_SUCCESS) {
1965 fcport->old_loop_id = fcport->loop_id;
1966
1967 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
1968 ha->host_no, fcport->loop_id));
1969
1970 fcport->port_login_retry_count =
1971 ha->port_down_retry_count * PORT_RETRY_TIME;
1972 atomic_set(&fcport->state, FCS_ONLINE);
1973 atomic_set(&fcport->port_down_timer,
1974 ha->port_down_retry_count * PORT_RETRY_TIME);
1975
1976 fcport->login_retry = 0;
1977 } else if (status == 1) {
1978 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1979 /* retry the login again */
1980 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
1981 ha->host_no,
1982 fcport->login_retry, fcport->loop_id));
1983 } else {
1984 fcport->login_retry = 0;
1985 }
1986 }
1987 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
1988 break;
1989 }
1990 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
1991 ha->host_no));
1992 }
1993
1994 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
1995 atomic_read(&ha->loop_state) != LOOP_DOWN) {
1996
1997 clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
1998 DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
1999 ha->host_no));
2000
2001 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2002
2003 DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2004 ha->host_no));
2005 }
2006
2007 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2008
2009 DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2010 ha->host_no));
2011
2012 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2013 &ha->dpc_flags))) {
2014
2015 qla2x00_loop_resync(ha);
2016
2017 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2018 }
2019
2020 DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2021 ha->host_no));
2022 }
2023
2024 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2025
2026 DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2027 ha->host_no));
2028
2029 qla2x00_rescan_fcports(ha);
2030
2031 DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2032 "end.\n",
2033 ha->host_no));
2034 }
2035
2036 if (!ha->interrupts_on)
2037 qla2x00_enable_intrs(ha);
2038
2039 ha->dpc_active = 0;
2040 } /* End of while(1) */
2041
2042 DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2043
2044 /*
2045 * Make sure that nobody tries to wake us up again.
2046 */
2047 ha->dpc_wait = NULL;
2048 ha->dpc_active = 0;
2049
2050 complete_and_exit(&ha->dpc_exited, 0);
2051 }
2052
2053 /*
2054 * qla2x00_rst_aen
2055 * Processes asynchronous reset.
2056 *
2057 * Input:
2058 * ha = adapter block pointer.
2059 */
2060 static void
2061 qla2x00_rst_aen(scsi_qla_host_t *ha)
2062 {
2063 if (ha->flags.online && !ha->flags.reset_active &&
2064 !atomic_read(&ha->loop_down_timer) &&
2065 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2066 do {
2067 clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2068
2069 /*
2070 * Issue marker command only when we are going to start
2071 * the I/O.
2072 */
2073 ha->marker_needed = 1;
2074 } while (!atomic_read(&ha->loop_down_timer) &&
2075 (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2076 }
2077 }
2078
2079
2080 /*
2081 * This routine will allocate SP from the free queue
2082 * input:
2083 * scsi_qla_host_t *
2084 * output:
2085 * srb_t * or NULL
2086 */
2087 static srb_t *
2088 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2089 {
2090 srb_t *sp;
2091
2092 sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2093 if (sp)
2094 atomic_set(&sp->ref_count, 1);
2095 return (sp);
2096 }
2097
2098 static void
2099 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2100 {
2101 struct scsi_cmnd *cmd = sp->cmd;
2102
2103 if (sp->flags & SRB_DMA_VALID) {
2104 if (cmd->use_sg) {
2105 dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2106 cmd->use_sg, cmd->sc_data_direction);
2107 } else if (cmd->request_bufflen) {
2108 dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2109 cmd->request_bufflen, cmd->sc_data_direction);
2110 }
2111 sp->flags &= ~SRB_DMA_VALID;
2112 }
2113 }
2114
2115 void
2116 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2117 {
2118 struct scsi_cmnd *cmd = sp->cmd;
2119
2120 qla2x00_sp_free_dma(ha, sp);
2121
2122 CMD_SP(cmd) = NULL;
2123 mempool_free(sp, ha->srb_mempool);
2124
2125 cmd->scsi_done(cmd);
2126 }
2127
2128 /**************************************************************************
2129 * qla2x00_timer
2130 *
2131 * Description:
2132 * One second timer
2133 *
2134 * Context: Interrupt
2135 ***************************************************************************/
2136 static void
2137 qla2x00_timer(scsi_qla_host_t *ha)
2138 {
2139 unsigned long cpu_flags = 0;
2140 fc_port_t *fcport;
2141 int start_dpc = 0;
2142 int index;
2143 srb_t *sp;
2144 int t;
2145
2146 /*
2147 * Ports - Port down timer.
2148 *
2149 * Whenever, a port is in the LOST state we start decrementing its port
2150 * down timer every second until it reaches zero. Once it reaches zero
2151 * the port it marked DEAD.
2152 */
2153 t = 0;
2154 list_for_each_entry(fcport, &ha->fcports, list) {
2155 if (fcport->port_type != FCT_TARGET)
2156 continue;
2157
2158 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2159
2160 if (atomic_read(&fcport->port_down_timer) == 0)
2161 continue;
2162
2163 if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2164 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2165
2166 DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2167 "%d remainning\n",
2168 ha->host_no,
2169 t, atomic_read(&fcport->port_down_timer)));
2170 }
2171 t++;
2172 } /* End of for fcport */
2173
2174
2175 /* Loop down handler. */
2176 if (atomic_read(&ha->loop_down_timer) > 0 &&
2177 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2178
2179 if (atomic_read(&ha->loop_down_timer) ==
2180 ha->loop_down_abort_time) {
2181
2182 DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2183 "queues before time expire\n",
2184 ha->host_no));
2185
2186 if (!IS_QLA2100(ha) && ha->link_down_timeout)
2187 atomic_set(&ha->loop_state, LOOP_DEAD);
2188
2189 /* Schedule an ISP abort to return any tape commands. */
2190 spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2191 for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2192 index++) {
2193 fc_port_t *sfcp;
2194
2195 sp = ha->outstanding_cmds[index];
2196 if (!sp)
2197 continue;
2198 sfcp = sp->fcport;
2199 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2200 continue;
2201
2202 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2203 break;
2204 }
2205 spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2206
2207 set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2208 start_dpc++;
2209 }
2210
2211 /* if the loop has been down for 4 minutes, reinit adapter */
2212 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2213 DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2214 "restarting queues.\n",
2215 ha->host_no));
2216
2217 set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2218 start_dpc++;
2219
2220 if (!(ha->device_flags & DFLG_NO_CABLE)) {
2221 DEBUG(printk("scsi(%ld): Loop down - "
2222 "aborting ISP.\n",
2223 ha->host_no));
2224 qla_printk(KERN_WARNING, ha,
2225 "Loop down - aborting ISP.\n");
2226
2227 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2228 }
2229 }
2230 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2231 ha->host_no,
2232 atomic_read(&ha->loop_down_timer)));
2233 }
2234
2235 /* Schedule the DPC routine if needed */
2236 if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2237 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2238 start_dpc ||
2239 test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2240 test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2241 test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2242 ha->dpc_wait && !ha->dpc_active) {
2243
2244 up(ha->dpc_wait);
2245 }
2246
2247 qla2x00_restart_timer(ha, WATCH_INTERVAL);
2248 }
2249
2250 /* XXX(hch): crude hack to emulate a down_timeout() */
2251 int
2252 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2253 {
2254 const unsigned int step = HZ/10;
2255
2256 do {
2257 if (!down_trylock(sema))
2258 return 0;
2259 set_current_state(TASK_INTERRUPTIBLE);
2260 if (schedule_timeout(step))
2261 break;
2262 } while ((timeout -= step) > 0);
2263
2264 return -ETIMEDOUT;
2265 }
2266
2267 /**
2268 * qla2x00_module_init - Module initialization.
2269 **/
2270 static int __init
2271 qla2x00_module_init(void)
2272 {
2273 /* Allocate cache for SRBs. */
2274 srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
2275 SLAB_HWCACHE_ALIGN, NULL, NULL);
2276 if (srb_cachep == NULL) {
2277 printk(KERN_ERR
2278 "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2279 return -ENOMEM;
2280 }
2281
2282 /* Derive version string. */
2283 strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2284 #if DEBUG_QLA2100
2285 strcat(qla2x00_version_str, "-debug");
2286 #endif
2287 qla2xxx_transport_template =
2288 fc_attach_transport(&qla2xxx_transport_functions);
2289 if (!qla2xxx_transport_template)
2290 return -ENODEV;
2291
2292 printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2293 return 0;
2294 }
2295
2296 /**
2297 * qla2x00_module_exit - Module cleanup.
2298 **/
2299 static void __exit
2300 qla2x00_module_exit(void)
2301 {
2302 kmem_cache_destroy(srb_cachep);
2303 fc_release_transport(qla2xxx_transport_template);
2304 }
2305
2306 module_init(qla2x00_module_init);
2307 module_exit(qla2x00_module_exit);
2308
2309 MODULE_AUTHOR("QLogic Corporation");
2310 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2311 MODULE_LICENSE("GPL");
2312 MODULE_VERSION(QLA2XXX_VERSION);
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