?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
[JFFS2] Use a single config option for write buffer support
[linux-2.6.git] / drivers / scsi / qla2xxx / qla_os.c
blob579448222d691d77bd656a35fa536d58be3ad417
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 char srb_cachep_name[16];
40 kmem_cache_t *srb_cachep;
41
42 /*
43 * Stats for all adpaters.
44 */
45 struct _qla2x00stats qla2x00_stats;
46
47 /*
48 * Ioctl related information.
49 */
50 int num_hosts;
51 int apiHBAInstance;
52
53 /*
54 * Module parameter information and variables
55 */
56 int ql2xmaxqdepth;
57 module_param(ql2xmaxqdepth, int, S_IRUGO|S_IWUSR);
58 MODULE_PARM_DESC(ql2xmaxqdepth,
59 "Maximum queue depth to report for target devices.");
60
61 int ql2xlogintimeout = 20;
62 module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
63 MODULE_PARM_DESC(ql2xlogintimeout,
64 "Login timeout value in seconds.");
65
66 int qlport_down_retry = 30;
67 module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
68 MODULE_PARM_DESC(qlport_down_retry,
69 "Maximum number of command retries to a port that returns"
70 "a PORT-DOWN status.");
71
72 int ql2xretrycount = 20;
73 module_param(ql2xretrycount, int, S_IRUGO|S_IWUSR);
74 MODULE_PARM_DESC(ql2xretrycount,
75 "Maximum number of mid-layer retries allowed for a command. "
76 "Default value is 20, ");
77
78 int ql2xplogiabsentdevice;
79 module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
80 MODULE_PARM_DESC(ql2xplogiabsentdevice,
81 "Option to enable PLOGI to devices that are not present after "
82 "a Fabric scan. This is needed for several broken switches."
83 "Default is 0 - no PLOGI. 1 - perfom PLOGI.");
84
85 int ql2xenablezio = 0;
86 module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
87 MODULE_PARM_DESC(ql2xenablezio,
88 "Option to enable ZIO:If 1 then enable it otherwise"
89 " use the default set in the NVRAM."
90 " Default is 0 : disabled");
91
92 int ql2xintrdelaytimer = 10;
93 module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
94 MODULE_PARM_DESC(ql2xintrdelaytimer,
95 "ZIO: Waiting time for Firmware before it generates an "
96 "interrupt to the host to notify completion of request.");
97
98 int ConfigRequired;
99 module_param(ConfigRequired, int, S_IRUGO|S_IRUSR);
100 MODULE_PARM_DESC(ConfigRequired,
101 "If 1, then only configured devices passed in through the"
102 "ql2xopts parameter will be presented to the OS");
103
104 int Bind = BIND_BY_PORT_NAME;
105 module_param(Bind, int, S_IRUGO|S_IRUSR);
106 MODULE_PARM_DESC(Bind,
107 "Target persistent binding method: "
108 "0 by Portname (default); 1 by PortID; 2 by Nodename. ");
109
110 int ql2xsuspendcount = SUSPEND_COUNT;
111 module_param(ql2xsuspendcount, int, S_IRUGO|S_IWUSR);
112 MODULE_PARM_DESC(ql2xsuspendcount,
113 "Number of 6-second suspend iterations to perform while a "
114 "target returns a <NOT READY> status. Default is 10 "
115 "iterations.");
116
117 int ql2xloginretrycount = 0;
118 module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
119 MODULE_PARM_DESC(ql2xloginretrycount,
120 "Specify an alternate value for the NVRAM login retry count.");
121
122 static void qla2x00_free_device(scsi_qla_host_t *);
123
124 static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
125
126 /*
127 * SCSI host template entry points
128 */
129 static int qla2xxx_slave_configure(struct scsi_device * device);
130 static int qla2xxx_slave_alloc(struct scsi_device *);
131 static void qla2xxx_slave_destroy(struct scsi_device *);
132 static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
133 void (*fn)(struct scsi_cmnd *));
134 static int qla2xxx_eh_abort(struct scsi_cmnd *);
135 static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
136 static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
137 static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
138 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
139 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
140
141 static struct scsi_host_template qla2x00_driver_template = {
142 .module = THIS_MODULE,
143 .name = "qla2xxx",
144 .queuecommand = qla2x00_queuecommand,
145
146 .eh_abort_handler = qla2xxx_eh_abort,
147 .eh_device_reset_handler = qla2xxx_eh_device_reset,
148 .eh_bus_reset_handler = qla2xxx_eh_bus_reset,
149 .eh_host_reset_handler = qla2xxx_eh_host_reset,
150
151 .slave_configure = qla2xxx_slave_configure,
152
153 .slave_alloc = qla2xxx_slave_alloc,
154 .slave_destroy = qla2xxx_slave_destroy,
155 .this_id = -1,
156 .cmd_per_lun = 3,
157 .use_clustering = ENABLE_CLUSTERING,
158 .sg_tablesize = SG_ALL,
159
160 /*
161 * The RISC allows for each command to transfer (2^32-1) bytes of data,
162 * which equates to 0x800000 sectors.
163 */
164 .max_sectors = 0xFFFF,
165 };
166
167 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
168
169 /* TODO Convert to inlines
170 *
171 * Timer routines
172 */
173 #define WATCH_INTERVAL 1 /* number of seconds */
174
175 static void qla2x00_timer(scsi_qla_host_t *);
176
177 static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
178 void *, unsigned long);
179 static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
180 static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
181
182 static inline void
183 qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
184 {
185 init_timer(&ha->timer);
186 ha->timer.expires = jiffies + interval * HZ;
187 ha->timer.data = (unsigned long)ha;
188 ha->timer.function = (void (*)(unsigned long))func;
189 add_timer(&ha->timer);
190 ha->timer_active = 1;
191 }
192
193 static inline void
194 qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
195 {
196 mod_timer(&ha->timer, jiffies + interval * HZ);
197 }
198
199 static __inline__ void
200 qla2x00_stop_timer(scsi_qla_host_t *ha)
201 {
202 del_timer_sync(&ha->timer);
203 ha->timer_active = 0;
204 }
205
206 static int qla2x00_do_dpc(void *data);
207
208 static void qla2x00_rst_aen(scsi_qla_host_t *);
209
210 static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
211 static void qla2x00_mem_free(scsi_qla_host_t *ha);
212 static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
213 static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
214 static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
215 static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
216 void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
217
218 /* -------------------------------------------------------------------------- */
219
220 static char *
221 qla2x00_get_pci_info_str(struct scsi_qla_host *ha, char *str)
222 {
223 static char *pci_bus_modes[] = {
224 "33", "66", "100", "133",
225 };
226 uint16_t pci_bus;
227
228 strcpy(str, "PCI");
229 pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
230 if (pci_bus) {
231 strcat(str, "-X (");
232 strcat(str, pci_bus_modes[pci_bus]);
233 } else {
234 pci_bus = (ha->pci_attr & BIT_8) >> 8;
235 strcat(str, " (");
236 strcat(str, pci_bus_modes[pci_bus]);
237 }
238 strcat(str, " MHz)");
239
240 return (str);
241 }
242
243 char *
244 qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
245 {
246 char un_str[10];
247
248 sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
249 ha->fw_minor_version,
250 ha->fw_subminor_version);
251
252 if (ha->fw_attributes & BIT_9) {
253 strcat(str, "FLX");
254 return (str);
255 }
256
257 switch (ha->fw_attributes & 0xFF) {
258 case 0x7:
259 strcat(str, "EF");
260 break;
261 case 0x17:
262 strcat(str, "TP");
263 break;
264 case 0x37:
265 strcat(str, "IP");
266 break;
267 case 0x77:
268 strcat(str, "VI");
269 break;
270 default:
271 sprintf(un_str, "(%x)", ha->fw_attributes);
272 strcat(str, un_str);
273 break;
274 }
275 if (ha->fw_attributes & 0x100)
276 strcat(str, "X");
277
278 return (str);
279 }
280
281 /**************************************************************************
282 * qla2x00_queuecommand
283 *
284 * Description:
285 * Queue a command to the controller.
286 *
287 * Input:
288 * cmd - pointer to Scsi cmd structure
289 * fn - pointer to Scsi done function
290 *
291 * Returns:
292 * 0 - Always
293 *
294 * Note:
295 * The mid-level driver tries to ensures that queuecommand never gets invoked
296 * concurrently with itself or the interrupt handler (although the
297 * interrupt handler may call this routine as part of request-completion
298 * handling).
299 **************************************************************************/
300 static int
301 qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
302 {
303 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
304 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
305 srb_t *sp;
306 int rval;
307
308 if (!fcport) {
309 cmd->result = DID_NO_CONNECT << 16;
310 goto qc_fail_command;
311 }
312
313 if (atomic_read(&fcport->state) != FCS_ONLINE) {
314 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
315 atomic_read(&ha->loop_state) == LOOP_DEAD) {
316 cmd->result = DID_NO_CONNECT << 16;
317 goto qc_fail_command;
318 }
319 goto qc_host_busy;
320 }
321
322 spin_unlock_irq(ha->host->host_lock);
323
324 /* Allocate a command packet from the "sp" pool. */
325 if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
326 goto qc_host_busy_lock;
327 }
328
329 sp->ha = ha;
330 sp->fcport = fcport;
331 sp->cmd = cmd;
332 sp->flags = 0;
333 sp->err_id = 0;
334
335 CMD_SP(cmd) = (void *)sp;
336 cmd->scsi_done = done;
337
338 rval = qla2x00_start_scsi(sp);
339 if (rval != QLA_SUCCESS)
340 goto qc_host_busy_free_sp;
341
342 /* Manage unprocessed RIO/ZIO commands in response queue. */
343 if (ha->flags.online && ha->flags.process_response_queue &&
344 ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
345 unsigned long flags;
346
347 spin_lock_irqsave(&ha->hardware_lock, flags);
348 qla2x00_process_response_queue(ha);
349 spin_unlock_irqrestore(&ha->hardware_lock, flags);
350 }
351
352 spin_lock_irq(ha->host->host_lock);
353
354 return 0;
355
356 qc_host_busy_free_sp:
357 qla2x00_sp_free_dma(ha, sp);
358 CMD_SP(cmd) = NULL;
359 mempool_free(sp, ha->srb_mempool);
360
361 qc_host_busy_lock:
362 spin_lock_irq(ha->host->host_lock);
363
364 qc_host_busy:
365 return SCSI_MLQUEUE_HOST_BUSY;
366
367 qc_fail_command:
368 done(cmd);
369
370 return 0;
371 }
372
373 /*
374 * qla2x00_eh_wait_on_command
375 * Waits for the command to be returned by the Firmware for some
376 * max time.
377 *
378 * Input:
379 * ha = actual ha whose done queue will contain the command
380 * returned by firmware.
381 * cmd = Scsi Command to wait on.
382 * flag = Abort/Reset(Bus or Device Reset)
383 *
384 * Return:
385 * Not Found : 0
386 * Found : 1
387 */
388 static int
389 qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
390 {
391 #define ABORT_POLLING_PERIOD HZ
392 #define ABORT_WAIT_ITER ((10 * HZ) / (ABORT_POLLING_PERIOD))
393 unsigned long wait_iter = ABORT_WAIT_ITER;
394 int ret = QLA_SUCCESS;
395
396 while (CMD_SP(cmd)) {
397 set_current_state(TASK_UNINTERRUPTIBLE);
398 schedule_timeout(ABORT_POLLING_PERIOD);
399
400 if (--wait_iter)
401 break;
402 }
403 if (CMD_SP(cmd))
404 ret = QLA_FUNCTION_FAILED;
405
406 return ret;
407 }
408
409 /*
410 * qla2x00_wait_for_hba_online
411 * Wait till the HBA is online after going through
412 * <= MAX_RETRIES_OF_ISP_ABORT or
413 * finally HBA is disabled ie marked offline
414 *
415 * Input:
416 * ha - pointer to host adapter structure
417 *
418 * Note:
419 * Does context switching-Release SPIN_LOCK
420 * (if any) before calling this routine.
421 *
422 * Return:
423 * Success (Adapter is online) : 0
424 * Failed (Adapter is offline/disabled) : 1
425 */
426 static int
427 qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
428 {
429 int return_status;
430 unsigned long wait_online;
431
432 wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ);
433 while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
434 test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
435 test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
436 ha->dpc_active) && time_before(jiffies, wait_online)) {
437
438 msleep(1000);
439 }
440 if (ha->flags.online)
441 return_status = QLA_SUCCESS;
442 else
443 return_status = QLA_FUNCTION_FAILED;
444
445 DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
446
447 return (return_status);
448 }
449
450 /*
451 * qla2x00_wait_for_loop_ready
452 * Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
453 * to be in LOOP_READY state.
454 * Input:
455 * ha - pointer to host adapter structure
456 *
457 * Note:
458 * Does context switching-Release SPIN_LOCK
459 * (if any) before calling this routine.
460 *
461 *
462 * Return:
463 * Success (LOOP_READY) : 0
464 * Failed (LOOP_NOT_READY) : 1
465 */
466 static inline int
467 qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
468 {
469 int return_status = QLA_SUCCESS;
470 unsigned long loop_timeout ;
471
472 /* wait for 5 min at the max for loop to be ready */
473 loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ);
474
475 while ((!atomic_read(&ha->loop_down_timer) &&
476 atomic_read(&ha->loop_state) == LOOP_DOWN) ||
477 test_bit(CFG_ACTIVE, &ha->cfg_flags) ||
478 atomic_read(&ha->loop_state) != LOOP_READY) {
479 msleep(1000);
480 if (time_after_eq(jiffies, loop_timeout)) {
481 return_status = QLA_FUNCTION_FAILED;
482 break;
483 }
484 }
485 return (return_status);
486 }
487
488 /**************************************************************************
489 * qla2xxx_eh_abort
490 *
491 * Description:
492 * The abort function will abort the specified command.
493 *
494 * Input:
495 * cmd = Linux SCSI command packet to be aborted.
496 *
497 * Returns:
498 * Either SUCCESS or FAILED.
499 *
500 * Note:
501 **************************************************************************/
502 int
503 qla2xxx_eh_abort(struct scsi_cmnd *cmd)
504 {
505 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
506 srb_t *sp;
507 int ret, i;
508 unsigned int id, lun;
509 unsigned long serial;
510
511 if (!CMD_SP(cmd))
512 return FAILED;
513
514 ret = FAILED;
515
516 id = cmd->device->id;
517 lun = cmd->device->lun;
518 serial = cmd->serial_number;
519
520 /* Check active list for command command. */
521 spin_unlock_irq(ha->host->host_lock);
522 spin_lock(&ha->hardware_lock);
523 for (i = 1; i < MAX_OUTSTANDING_COMMANDS; i++) {
524 sp = ha->outstanding_cmds[i];
525
526 if (sp == NULL)
527 continue;
528
529 if (sp->cmd != cmd)
530 continue;
531
532 DEBUG2(printk("%s(%ld): aborting sp %p from RISC. pid=%ld "
533 "sp->state=%x\n", __func__, ha->host_no, sp, serial,
534 sp->state));
535 DEBUG3(qla2x00_print_scsi_cmd(cmd);)
536
537 spin_unlock(&ha->hardware_lock);
538 if (qla2x00_abort_command(ha, sp)) {
539 DEBUG2(printk("%s(%ld): abort_command "
540 "mbx failed.\n", __func__, ha->host_no));
541 } else {
542 DEBUG3(printk("%s(%ld): abort_command "
543 "mbx success.\n", __func__, ha->host_no));
544 ret = SUCCESS;
545 }
546 spin_lock(&ha->hardware_lock);
547
548 break;
549 }
550
551 /* Wait for the command to be returned. */
552 if (ret == SUCCESS) {
553 spin_unlock(&ha->hardware_lock);
554 if (qla2x00_eh_wait_on_command(ha, cmd) != QLA_SUCCESS) {
555 qla_printk(KERN_ERR, ha,
556 "scsi(%ld:%d:%d): Abort handler timed out -- %lx "
557 "%x.\n", ha->host_no, id, lun, serial, ret);
558 }
559 spin_lock(&ha->hardware_lock);
560 }
561 spin_lock_irq(ha->host->host_lock);
562
563 qla_printk(KERN_INFO, ha,
564 "scsi(%ld:%d:%d): Abort command issued -- %lx %x.\n", ha->host_no,
565 id, lun, serial, ret);
566
567 return ret;
568 }
569
570 /**************************************************************************
571 * qla2x00_eh_wait_for_pending_target_commands
572 *
573 * Description:
574 * Waits for all the commands to come back from the specified target.
575 *
576 * Input:
577 * ha - pointer to scsi_qla_host structure.
578 * t - target
579 * Returns:
580 * Either SUCCESS or FAILED.
581 *
582 * Note:
583 **************************************************************************/
584 static int
585 qla2x00_eh_wait_for_pending_target_commands(scsi_qla_host_t *ha, unsigned int t)
586 {
587 int cnt;
588 int status;
589 srb_t *sp;
590 struct scsi_cmnd *cmd;
591
592 status = 0;
593
594 /*
595 * Waiting for all commands for the designated target in the active
596 * array
597 */
598 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
599 spin_lock(&ha->hardware_lock);
600 sp = ha->outstanding_cmds[cnt];
601 if (sp) {
602 cmd = sp->cmd;
603 spin_unlock(&ha->hardware_lock);
604 if (cmd->device->id == t) {
605 if (!qla2x00_eh_wait_on_command(ha, cmd)) {
606 status = 1;
607 break;
608 }
609 }
610 } else {
611 spin_unlock(&ha->hardware_lock);
612 }
613 }
614 return (status);
615 }
616
617
618 /**************************************************************************
619 * qla2xxx_eh_device_reset
620 *
621 * Description:
622 * The device reset function will reset the target and abort any
623 * executing commands.
624 *
625 * NOTE: The use of SP is undefined within this context. Do *NOT*
626 * attempt to use this value, even if you determine it is
627 * non-null.
628 *
629 * Input:
630 * cmd = Linux SCSI command packet of the command that cause the
631 * bus device reset.
632 *
633 * Returns:
634 * SUCCESS/FAILURE (defined as macro in scsi.h).
635 *
636 **************************************************************************/
637 int
638 qla2xxx_eh_device_reset(struct scsi_cmnd *cmd)
639 {
640 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
641 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
642 srb_t *sp;
643 int ret;
644 unsigned int id, lun;
645 unsigned long serial;
646
647 ret = FAILED;
648
649 id = cmd->device->id;
650 lun = cmd->device->lun;
651 serial = cmd->serial_number;
652
653 sp = (srb_t *) CMD_SP(cmd);
654 if (!sp || !fcport)
655 return ret;
656
657 qla_printk(KERN_INFO, ha,
658 "scsi(%ld:%d:%d): DEVICE RESET ISSUED.\n", ha->host_no, id, lun);
659
660 spin_unlock_irq(ha->host->host_lock);
661
662 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
663 spin_lock_irq(ha->host->host_lock);
664 goto eh_dev_reset_done;
665 }
666
667 if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
668 if (qla2x00_device_reset(ha, fcport) == 0)
669 ret = SUCCESS;
670
671 #if defined(LOGOUT_AFTER_DEVICE_RESET)
672 if (ret == SUCCESS) {
673 if (fcport->flags & FC_FABRIC_DEVICE) {
674 qla2x00_fabric_logout(ha, fcport->loop_id);
675 qla2x00_mark_device_lost(ha, fcport);
676 }
677 }
678 #endif
679 } else {
680 DEBUG2(printk(KERN_INFO
681 "%s failed: loop not ready\n",__func__);)
682 }
683
684 if (ret == FAILED) {
685 DEBUG3(printk("%s(%ld): device reset failed\n",
686 __func__, ha->host_no));
687 qla_printk(KERN_INFO, ha, "%s: device reset failed\n",
688 __func__);
689
690 goto eh_dev_reset_done;
691 }
692
693 /*
694 * If we are coming down the EH path, wait for all commands to
695 * complete for the device.
696 */
697 if (cmd->device->host->eh_active) {
698 if (qla2x00_eh_wait_for_pending_target_commands(ha, id))
699 ret = FAILED;
700
701 if (ret == FAILED) {
702 DEBUG3(printk("%s(%ld): failed while waiting for "
703 "commands\n", __func__, ha->host_no));
704 qla_printk(KERN_INFO, ha,
705 "%s: failed while waiting for commands\n",
706 __func__);
707
708 goto eh_dev_reset_done;
709 }
710 }
711
712 qla_printk(KERN_INFO, ha,
713 "scsi(%ld:%d:%d): DEVICE RESET SUCCEEDED.\n", ha->host_no, id, lun);
714
715 eh_dev_reset_done:
716 spin_lock_irq(ha->host->host_lock);
717
718 return ret;
719 }
720
721 /**************************************************************************
722 * qla2x00_eh_wait_for_pending_commands
723 *
724 * Description:
725 * Waits for all the commands to come back from the specified host.
726 *
727 * Input:
728 * ha - pointer to scsi_qla_host structure.
729 *
730 * Returns:
731 * 1 : SUCCESS
732 * 0 : FAILED
733 *
734 * Note:
735 **************************************************************************/
736 static int
737 qla2x00_eh_wait_for_pending_commands(scsi_qla_host_t *ha)
738 {
739 int cnt;
740 int status;
741 srb_t *sp;
742 struct scsi_cmnd *cmd;
743
744 status = 1;
745
746 /*
747 * Waiting for all commands for the designated target in the active
748 * array
749 */
750 for (cnt = 1; cnt < MAX_OUTSTANDING_COMMANDS; cnt++) {
751 spin_lock(&ha->hardware_lock);
752 sp = ha->outstanding_cmds[cnt];
753 if (sp) {
754 cmd = sp->cmd;
755 spin_unlock(&ha->hardware_lock);
756 status = qla2x00_eh_wait_on_command(ha, cmd);
757 if (status == 0)
758 break;
759 }
760 else {
761 spin_unlock(&ha->hardware_lock);
762 }
763 }
764 return (status);
765 }
766
767
768 /**************************************************************************
769 * qla2xxx_eh_bus_reset
770 *
771 * Description:
772 * The bus reset function will reset the bus and abort any executing
773 * commands.
774 *
775 * Input:
776 * cmd = Linux SCSI command packet of the command that cause the
777 * bus reset.
778 *
779 * Returns:
780 * SUCCESS/FAILURE (defined as macro in scsi.h).
781 *
782 **************************************************************************/
783 int
784 qla2xxx_eh_bus_reset(struct scsi_cmnd *cmd)
785 {
786 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
787 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
788 srb_t *sp;
789 int ret;
790 unsigned int id, lun;
791 unsigned long serial;
792
793 ret = FAILED;
794
795 id = cmd->device->id;
796 lun = cmd->device->lun;
797 serial = cmd->serial_number;
798
799 sp = (srb_t *) CMD_SP(cmd);
800 if (!sp || !fcport)
801 return ret;
802
803 qla_printk(KERN_INFO, ha,
804 "scsi(%ld:%d:%d): LOOP RESET ISSUED.\n", ha->host_no, id, lun);
805
806 spin_unlock_irq(ha->host->host_lock);
807
808 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS) {
809 DEBUG2(printk("%s failed:board disabled\n",__func__));
810 goto eh_bus_reset_done;
811 }
812
813 if (qla2x00_wait_for_loop_ready(ha) == QLA_SUCCESS) {
814 if (qla2x00_loop_reset(ha) == QLA_SUCCESS)
815 ret = SUCCESS;
816 }
817 if (ret == FAILED)
818 goto eh_bus_reset_done;
819
820 /* Waiting for our command in done_queue to be returned to OS.*/
821 if (cmd->device->host->eh_active)
822 if (!qla2x00_eh_wait_for_pending_commands(ha))
823 ret = FAILED;
824
825 eh_bus_reset_done:
826 qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
827 (ret == FAILED) ? "failed" : "succeded");
828
829 spin_lock_irq(ha->host->host_lock);
830
831 return ret;
832 }
833
834 /**************************************************************************
835 * qla2xxx_eh_host_reset
836 *
837 * Description:
838 * The reset function will reset the Adapter.
839 *
840 * Input:
841 * cmd = Linux SCSI command packet of the command that cause the
842 * adapter reset.
843 *
844 * Returns:
845 * Either SUCCESS or FAILED.
846 *
847 * Note:
848 **************************************************************************/
849 int
850 qla2xxx_eh_host_reset(struct scsi_cmnd *cmd)
851 {
852 scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
853 fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
854 srb_t *sp;
855 int ret;
856 unsigned int id, lun;
857 unsigned long serial;
858
859 ret = FAILED;
860
861 id = cmd->device->id;
862 lun = cmd->device->lun;
863 serial = cmd->serial_number;
864
865 sp = (srb_t *) CMD_SP(cmd);
866 if (!sp || !fcport)
867 return ret;
868
869 qla_printk(KERN_INFO, ha,
870 "scsi(%ld:%d:%d): ADAPTER RESET ISSUED.\n", ha->host_no, id, lun);
871
872 spin_unlock_irq(ha->host->host_lock);
873
874 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
875 goto eh_host_reset_lock;
876
877 /*
878 * Fixme-may be dpc thread is active and processing
879 * loop_resync,so wait a while for it to
880 * be completed and then issue big hammer.Otherwise
881 * it may cause I/O failure as big hammer marks the
882 * devices as lost kicking of the port_down_timer
883 * while dpc is stuck for the mailbox to complete.
884 */
885 qla2x00_wait_for_loop_ready(ha);
886 set_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
887 if (qla2x00_abort_isp(ha)) {
888 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
889 /* failed. schedule dpc to try */
890 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
891
892 if (qla2x00_wait_for_hba_online(ha) != QLA_SUCCESS)
893 goto eh_host_reset_lock;
894 }
895 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
896
897 /* Waiting for our command in done_queue to be returned to OS.*/
898 if (qla2x00_eh_wait_for_pending_commands(ha))
899 ret = SUCCESS;
900
901 eh_host_reset_lock:
902 spin_lock_irq(ha->host->host_lock);
903
904 qla_printk(KERN_INFO, ha, "%s: reset %s\n", __func__,
905 (ret == FAILED) ? "failed" : "succeded");
906
907 return ret;
908 }
909
910 /*
911 * qla2x00_loop_reset
912 * Issue loop reset.
913 *
914 * Input:
915 * ha = adapter block pointer.
916 *
917 * Returns:
918 * 0 = success
919 */
920 static int
921 qla2x00_loop_reset(scsi_qla_host_t *ha)
922 {
923 int status = QLA_SUCCESS;
924 struct fc_port *fcport;
925
926 if (ha->flags.enable_lip_reset) {
927 status = qla2x00_lip_reset(ha);
928 }
929
930 if (status == QLA_SUCCESS && ha->flags.enable_target_reset) {
931 list_for_each_entry(fcport, &ha->fcports, list) {
932 if (fcport->port_type != FCT_TARGET)
933 continue;
934
935 status = qla2x00_target_reset(ha, fcport);
936 if (status != QLA_SUCCESS)
937 break;
938 }
939 }
940
941 if (status == QLA_SUCCESS &&
942 ((!ha->flags.enable_target_reset &&
943 !ha->flags.enable_lip_reset) ||
944 ha->flags.enable_lip_full_login)) {
945
946 status = qla2x00_full_login_lip(ha);
947 }
948
949 /* Issue marker command only when we are going to start the I/O */
950 ha->marker_needed = 1;
951
952 if (status) {
953 /* Empty */
954 DEBUG2_3(printk("%s(%ld): **** FAILED ****\n",
955 __func__,
956 ha->host_no);)
957 } else {
958 /* Empty */
959 DEBUG3(printk("%s(%ld): exiting normally.\n",
960 __func__,
961 ha->host_no);)
962 }
963
964 return(status);
965 }
966
967 /*
968 * qla2x00_device_reset
969 * Issue bus device reset message to the target.
970 *
971 * Input:
972 * ha = adapter block pointer.
973 * t = SCSI ID.
974 * TARGET_QUEUE_LOCK must be released.
975 * ADAPTER_STATE_LOCK must be released.
976 *
977 * Context:
978 * Kernel context.
979 */
980 static int
981 qla2x00_device_reset(scsi_qla_host_t *ha, fc_port_t *reset_fcport)
982 {
983 /* Abort Target command will clear Reservation */
984 return qla2x00_abort_target(reset_fcport);
985 }
986
987 static int
988 qla2xxx_slave_alloc(struct scsi_device *sdev)
989 {
990 scsi_qla_host_t *ha = to_qla_host(sdev->host);
991 struct fc_rport *rport = starget_to_rport(scsi_target(sdev));
992 fc_port_t *fcport;
993 int found;
994
995 if (!rport)
996 return -ENXIO;
997
998 found = 0;
999 list_for_each_entry(fcport, &ha->fcports, list) {
1000 if (rport->port_name ==
1001 be64_to_cpu(*(uint64_t *)fcport->port_name)) {
1002 found++;
1003 break;
1004 }
1005 }
1006 if (!found)
1007 return -ENXIO;
1008
1009 sdev->hostdata = fcport;
1010
1011 return 0;
1012 }
1013
1014 static int
1015 qla2xxx_slave_configure(struct scsi_device *sdev)
1016 {
1017 scsi_qla_host_t *ha = to_qla_host(sdev->host);
1018 struct fc_rport *rport = starget_to_rport(sdev->sdev_target);
1019
1020 if (sdev->tagged_supported)
1021 scsi_activate_tcq(sdev, 32);
1022 else
1023 scsi_deactivate_tcq(sdev, 32);
1024
1025 rport->dev_loss_tmo = ha->port_down_retry_count + 5;
1026
1027 return 0;
1028 }
1029
1030 static void
1031 qla2xxx_slave_destroy(struct scsi_device *sdev)
1032 {
1033 sdev->hostdata = NULL;
1034 }
1035
1036 /**
1037 * qla2x00_config_dma_addressing() - Configure OS DMA addressing method.
1038 * @ha: HA context
1039 *
1040 * At exit, the @ha's flags.enable_64bit_addressing set to indicated
1041 * supported addressing method.
1042 */
1043 static void
1044 qla2x00_config_dma_addressing(scsi_qla_host_t *ha)
1045 {
1046 /* Assume 32bit DMA address */
1047 ha->flags.enable_64bit_addressing = 0;
1048 ha->calc_request_entries = qla2x00_calc_iocbs_32;
1049 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_32;
1050
1051 /*
1052 * Given the two variants pci_set_dma_mask(), allow the compiler to
1053 * assist in setting the proper dma mask.
1054 */
1055 if (sizeof(dma_addr_t) > 4) {
1056 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
1057 ha->flags.enable_64bit_addressing = 1;
1058 ha->calc_request_entries = qla2x00_calc_iocbs_64;
1059 ha->build_scsi_iocbs = qla2x00_build_scsi_iocbs_64;
1060
1061 if (pci_set_consistent_dma_mask(ha->pdev,
1062 DMA_64BIT_MASK)) {
1063 qla_printk(KERN_DEBUG, ha,
1064 "Failed to set 64 bit PCI consistent mask; "
1065 "using 32 bit.\n");
1066 pci_set_consistent_dma_mask(ha->pdev,
1067 DMA_32BIT_MASK);
1068 }
1069 } else {
1070 qla_printk(KERN_DEBUG, ha,
1071 "Failed to set 64 bit PCI DMA mask, falling back "
1072 "to 32 bit MASK.\n");
1073 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1074 }
1075 } else {
1076 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1077 }
1078 }
1079
1080 static int
1081 qla2x00_iospace_config(scsi_qla_host_t *ha)
1082 {
1083 unsigned long pio, pio_len, pio_flags;
1084 unsigned long mmio, mmio_len, mmio_flags;
1085
1086 /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1087 pio = pci_resource_start(ha->pdev, 0);
1088 pio_len = pci_resource_len(ha->pdev, 0);
1089 pio_flags = pci_resource_flags(ha->pdev, 0);
1090 if (pio_flags & IORESOURCE_IO) {
1091 if (pio_len < MIN_IOBASE_LEN) {
1092 qla_printk(KERN_WARNING, ha,
1093 "Invalid PCI I/O region size (%s)...\n",
1094 pci_name(ha->pdev));
1095 pio = 0;
1096 }
1097 } else {
1098 qla_printk(KERN_WARNING, ha,
1099 "region #0 not a PIO resource (%s)...\n",
1100 pci_name(ha->pdev));
1101 pio = 0;
1102 }
1103
1104 /* Use MMIO operations for all accesses. */
1105 mmio = pci_resource_start(ha->pdev, 1);
1106 mmio_len = pci_resource_len(ha->pdev, 1);
1107 mmio_flags = pci_resource_flags(ha->pdev, 1);
1108
1109 if (!(mmio_flags & IORESOURCE_MEM)) {
1110 qla_printk(KERN_ERR, ha,
1111 "region #0 not an MMIO resource (%s), aborting\n",
1112 pci_name(ha->pdev));
1113 goto iospace_error_exit;
1114 }
1115 if (mmio_len < MIN_IOBASE_LEN) {
1116 qla_printk(KERN_ERR, ha,
1117 "Invalid PCI mem region size (%s), aborting\n",
1118 pci_name(ha->pdev));
1119 goto iospace_error_exit;
1120 }
1121
1122 if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1123 qla_printk(KERN_WARNING, ha,
1124 "Failed to reserve PIO/MMIO regions (%s)\n",
1125 pci_name(ha->pdev));
1126
1127 goto iospace_error_exit;
1128 }
1129
1130 ha->pio_address = pio;
1131 ha->pio_length = pio_len;
1132 ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1133 if (!ha->iobase) {
1134 qla_printk(KERN_ERR, ha,
1135 "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1136
1137 goto iospace_error_exit;
1138 }
1139
1140 return (0);
1141
1142 iospace_error_exit:
1143 return (-ENOMEM);
1144 }
1145
1146 /*
1147 * PCI driver interface
1148 */
1149 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1150 {
1151 int ret;
1152 device_reg_t __iomem *reg;
1153 struct Scsi_Host *host;
1154 scsi_qla_host_t *ha;
1155 unsigned long flags = 0;
1156 unsigned long wait_switch = 0;
1157 char pci_info[20];
1158 char fw_str[30];
1159 fc_port_t *fcport;
1160
1161 if (pci_enable_device(pdev))
1162 return -1;
1163
1164 host = scsi_host_alloc(&qla2x00_driver_template,
1165 sizeof(scsi_qla_host_t));
1166 if (host == NULL) {
1167 printk(KERN_WARNING
1168 "qla2xxx: Couldn't allocate host from scsi layer!\n");
1169 goto probe_disable_device;
1170 }
1171
1172 /* Clear our data area */
1173 ha = (scsi_qla_host_t *)host->hostdata;
1174 memset(ha, 0, sizeof(scsi_qla_host_t));
1175
1176 ha->pdev = pdev;
1177 ha->host = host;
1178 ha->host_no = host->host_no;
1179 ha->brd_info = brd_info;
1180 sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1181
1182 /* Configure PCI I/O space */
1183 ret = qla2x00_iospace_config(ha);
1184 if (ret != 0) {
1185 goto probe_alloc_failed;
1186 }
1187
1188 /* Sanitize the information from PCI BIOS. */
1189 host->irq = pdev->irq;
1190
1191 qla_printk(KERN_INFO, ha,
1192 "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1193 host->irq, ha->iobase);
1194
1195 spin_lock_init(&ha->hardware_lock);
1196
1197 /* 4.23 Initialize /proc/scsi/qla2x00 counters */
1198 ha->actthreads = 0;
1199 ha->qthreads = 0;
1200 ha->total_isr_cnt = 0;
1201 ha->total_isp_aborts = 0;
1202 ha->total_lip_cnt = 0;
1203 ha->total_dev_errs = 0;
1204 ha->total_ios = 0;
1205 ha->total_bytes = 0;
1206
1207 ha->prev_topology = 0;
1208 ha->ports = MAX_BUSES;
1209
1210 if (IS_QLA2100(ha)) {
1211 ha->max_targets = MAX_TARGETS_2100;
1212 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1213 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1214 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1215 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1216 host->sg_tablesize = 32;
1217 } else if (IS_QLA2200(ha)) {
1218 ha->max_targets = MAX_TARGETS_2200;
1219 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1220 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1221 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1222 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1223 } else /*if (IS_QLA2300(ha))*/ {
1224 ha->max_targets = MAX_TARGETS_2200;
1225 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1226 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1227 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1228 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1229 }
1230 host->can_queue = ha->request_q_length + 128;
1231
1232 /* load the F/W, read paramaters, and init the H/W */
1233 ha->instance = num_hosts;
1234
1235 init_MUTEX(&ha->mbx_cmd_sem);
1236 init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1237
1238 INIT_LIST_HEAD(&ha->list);
1239 INIT_LIST_HEAD(&ha->fcports);
1240 INIT_LIST_HEAD(&ha->rscn_fcports);
1241
1242 /*
1243 * These locks are used to prevent more than one CPU
1244 * from modifying the queue at the same time. The
1245 * higher level "host_lock" will reduce most
1246 * contention for these locks.
1247 */
1248 spin_lock_init(&ha->mbx_reg_lock);
1249
1250 ha->dpc_pid = -1;
1251 init_completion(&ha->dpc_inited);
1252 init_completion(&ha->dpc_exited);
1253
1254 qla2x00_config_dma_addressing(ha);
1255 if (qla2x00_mem_alloc(ha)) {
1256 qla_printk(KERN_WARNING, ha,
1257 "[ERROR] Failed to allocate memory for adapter\n");
1258
1259 goto probe_alloc_failed;
1260 }
1261
1262 pci_set_drvdata(pdev, ha);
1263 host->this_id = 255;
1264 host->cmd_per_lun = 3;
1265 host->unique_id = ha->instance;
1266 host->max_cmd_len = MAX_CMDSZ;
1267 host->max_channel = ha->ports - 1;
1268 host->max_id = ha->max_targets;
1269 host->max_lun = ha->max_luns;
1270 host->transportt = qla2xxx_transport_template;
1271 if (scsi_add_host(host, &pdev->dev))
1272 goto probe_alloc_failed;
1273
1274 qla2x00_alloc_sysfs_attr(ha);
1275
1276 if (qla2x00_initialize_adapter(ha) &&
1277 !(ha->device_flags & DFLG_NO_CABLE)) {
1278
1279 qla_printk(KERN_WARNING, ha,
1280 "Failed to initialize adapter\n");
1281
1282 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1283 "Adapter flags %x.\n",
1284 ha->host_no, ha->device_flags));
1285
1286 goto probe_failed;
1287 }
1288
1289 qla2x00_init_host_attr(ha);
1290
1291 /*
1292 * Startup the kernel thread for this host adapter
1293 */
1294 ha->dpc_should_die = 0;
1295 ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1296 if (ha->dpc_pid < 0) {
1297 qla_printk(KERN_WARNING, ha,
1298 "Unable to start DPC thread!\n");
1299
1300 goto probe_failed;
1301 }
1302 wait_for_completion(&ha->dpc_inited);
1303
1304 if (IS_QLA2100(ha) || IS_QLA2200(ha))
1305 ret = request_irq(host->irq, qla2100_intr_handler,
1306 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1307 else
1308 ret = request_irq(host->irq, qla2300_intr_handler,
1309 SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1310 if (ret != 0) {
1311 qla_printk(KERN_WARNING, ha,
1312 "Failed to reserve interrupt %d already in use.\n",
1313 host->irq);
1314 goto probe_failed;
1315 }
1316
1317 /* Initialized the timer */
1318 qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1319
1320 DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1321 ha->host_no, ha));
1322
1323 reg = ha->iobase;
1324
1325 /* Disable ISP interrupts. */
1326 qla2x00_disable_intrs(ha);
1327
1328 /* Ensure mailbox registers are free. */
1329 spin_lock_irqsave(&ha->hardware_lock, flags);
1330 WRT_REG_WORD(&reg->semaphore, 0);
1331 WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1332 WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1333
1334 /* Enable proper parity */
1335 if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1336 if (IS_QLA2300(ha))
1337 /* SRAM parity */
1338 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1339 else
1340 /* SRAM, Instruction RAM and GP RAM parity */
1341 WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1342 }
1343 spin_unlock_irqrestore(&ha->hardware_lock, flags);
1344
1345 /* Enable chip interrupts. */
1346 qla2x00_enable_intrs(ha);
1347
1348 /* v2.19.5b6 */
1349 /*
1350 * Wait around max loop_reset_delay secs for the devices to come
1351 * on-line. We don't want Linux scanning before we are ready.
1352 *
1353 */
1354 for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1355 time_before(jiffies,wait_switch) &&
1356 !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1357 && (ha->device_flags & SWITCH_FOUND) ;) {
1358
1359 qla2x00_check_fabric_devices(ha);
1360
1361 msleep(10);
1362 }
1363
1364 ha->flags.init_done = 1;
1365 num_hosts++;
1366
1367 qla_printk(KERN_INFO, ha, "\n"
1368 " QLogic Fibre Channel HBA Driver: %s\n"
1369 " QLogic %s - %s\n"
1370 " %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1371 ha->model_number, ha->model_desc ? ha->model_desc: "",
1372 ha->brd_info->isp_name, qla2x00_get_pci_info_str(ha, pci_info),
1373 pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1374 ha->host_no, qla2x00_get_fw_version_str(ha, fw_str));
1375
1376 /* Go with fc_rport registration. */
1377 list_for_each_entry(fcport, &ha->fcports, list)
1378 qla2x00_reg_remote_port(ha, fcport);
1379
1380 return 0;
1381
1382 probe_failed:
1383 fc_remove_host(ha->host);
1384
1385 scsi_remove_host(host);
1386
1387 probe_alloc_failed:
1388 qla2x00_free_device(ha);
1389
1390 scsi_host_put(host);
1391
1392 probe_disable_device:
1393 pci_disable_device(pdev);
1394
1395 return -1;
1396 }
1397 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1398
1399 void qla2x00_remove_one(struct pci_dev *pdev)
1400 {
1401 scsi_qla_host_t *ha;
1402
1403 ha = pci_get_drvdata(pdev);
1404
1405 qla2x00_free_sysfs_attr(ha);
1406
1407 fc_remove_host(ha->host);
1408
1409 scsi_remove_host(ha->host);
1410
1411 qla2x00_free_device(ha);
1412
1413 scsi_host_put(ha->host);
1414
1415 pci_set_drvdata(pdev, NULL);
1416 }
1417 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1418
1419 static void
1420 qla2x00_free_device(scsi_qla_host_t *ha)
1421 {
1422 int ret;
1423
1424 /* Abort any outstanding IO descriptors. */
1425 if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1426 qla2x00_cancel_io_descriptors(ha);
1427
1428 /* turn-off interrupts on the card */
1429 if (ha->interrupts_on)
1430 qla2x00_disable_intrs(ha);
1431
1432 /* Disable timer */
1433 if (ha->timer_active)
1434 qla2x00_stop_timer(ha);
1435
1436 /* Kill the kernel thread for this host */
1437 if (ha->dpc_pid >= 0) {
1438 ha->dpc_should_die = 1;
1439 wmb();
1440 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1441 if (ret) {
1442 qla_printk(KERN_ERR, ha,
1443 "Unable to signal DPC thread -- (%d)\n", ret);
1444
1445 /* TODO: SOMETHING MORE??? */
1446 } else {
1447 wait_for_completion(&ha->dpc_exited);
1448 }
1449 }
1450
1451 qla2x00_mem_free(ha);
1452
1453
1454 ha->flags.online = 0;
1455
1456 /* Detach interrupts */
1457 if (ha->pdev->irq)
1458 free_irq(ha->pdev->irq, ha);
1459
1460 /* release io space registers */
1461 if (ha->iobase)
1462 iounmap(ha->iobase);
1463 pci_release_regions(ha->pdev);
1464
1465 pci_disable_device(ha->pdev);
1466 }
1467
1468 /*
1469 * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1470 *
1471 * Input: ha = adapter block pointer. fcport = port structure pointer.
1472 *
1473 * Return: None.
1474 *
1475 * Context:
1476 */
1477 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1478 int do_login)
1479 {
1480 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1481 fc_remote_port_block(fcport->rport);
1482 /*
1483 * We may need to retry the login, so don't change the state of the
1484 * port but do the retries.
1485 */
1486 if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1487 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1488
1489 if (!do_login)
1490 return;
1491
1492 if (fcport->login_retry == 0) {
1493 fcport->login_retry = ha->login_retry_count;
1494 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1495
1496 DEBUG(printk("scsi(%ld): Port login retry: "
1497 "%02x%02x%02x%02x%02x%02x%02x%02x, "
1498 "id = 0x%04x retry cnt=%d\n",
1499 ha->host_no,
1500 fcport->port_name[0],
1501 fcport->port_name[1],
1502 fcport->port_name[2],
1503 fcport->port_name[3],
1504 fcport->port_name[4],
1505 fcport->port_name[5],
1506 fcport->port_name[6],
1507 fcport->port_name[7],
1508 fcport->loop_id,
1509 fcport->login_retry));
1510 }
1511 }
1512
1513 /*
1514 * qla2x00_mark_all_devices_lost
1515 * Updates fcport state when device goes offline.
1516 *
1517 * Input:
1518 * ha = adapter block pointer.
1519 * fcport = port structure pointer.
1520 *
1521 * Return:
1522 * None.
1523 *
1524 * Context:
1525 */
1526 void
1527 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha)
1528 {
1529 fc_port_t *fcport;
1530
1531 list_for_each_entry(fcport, &ha->fcports, list) {
1532 if (fcport->port_type != FCT_TARGET)
1533 continue;
1534
1535 /*
1536 * No point in marking the device as lost, if the device is
1537 * already DEAD.
1538 */
1539 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1540 continue;
1541 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1542 fc_remote_port_block(fcport->rport);
1543 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1544 }
1545 }
1546
1547 /*
1548 * qla2x00_mem_alloc
1549 * Allocates adapter memory.
1550 *
1551 * Returns:
1552 * 0 = success.
1553 * 1 = failure.
1554 */
1555 static uint8_t
1556 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1557 {
1558 char name[16];
1559 uint8_t status = 1;
1560 int retry= 10;
1561
1562 do {
1563 /*
1564 * This will loop only once if everything goes well, else some
1565 * number of retries will be performed to get around a kernel
1566 * bug where available mem is not allocated until after a
1567 * little delay and a retry.
1568 */
1569 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1570 (ha->request_q_length + 1) * sizeof(request_t),
1571 &ha->request_dma, GFP_KERNEL);
1572 if (ha->request_ring == NULL) {
1573 qla_printk(KERN_WARNING, ha,
1574 "Memory Allocation failed - request_ring\n");
1575
1576 qla2x00_mem_free(ha);
1577 msleep(100);
1578
1579 continue;
1580 }
1581
1582 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1583 (ha->response_q_length + 1) * sizeof(response_t),
1584 &ha->response_dma, GFP_KERNEL);
1585 if (ha->response_ring == NULL) {
1586 qla_printk(KERN_WARNING, ha,
1587 "Memory Allocation failed - response_ring\n");
1588
1589 qla2x00_mem_free(ha);
1590 msleep(100);
1591
1592 continue;
1593 }
1594
1595 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1596 &ha->gid_list_dma, GFP_KERNEL);
1597 if (ha->gid_list == NULL) {
1598 qla_printk(KERN_WARNING, ha,
1599 "Memory Allocation failed - gid_list\n");
1600
1601 qla2x00_mem_free(ha);
1602 msleep(100);
1603
1604 continue;
1605 }
1606
1607 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1608 sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1609 if (ha->rlc_rsp == NULL) {
1610 qla_printk(KERN_WARNING, ha,
1611 "Memory Allocation failed - rlc");
1612
1613 qla2x00_mem_free(ha);
1614 msleep(100);
1615
1616 continue;
1617 }
1618
1619 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1620 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1621 DMA_POOL_SIZE, 8, 0);
1622 if (ha->s_dma_pool == NULL) {
1623 qla_printk(KERN_WARNING, ha,
1624 "Memory Allocation failed - s_dma_pool\n");
1625
1626 qla2x00_mem_free(ha);
1627 msleep(100);
1628
1629 continue;
1630 }
1631
1632 /* get consistent memory allocated for init control block */
1633 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1634 &ha->init_cb_dma);
1635 if (ha->init_cb == NULL) {
1636 qla_printk(KERN_WARNING, ha,
1637 "Memory Allocation failed - init_cb\n");
1638
1639 qla2x00_mem_free(ha);
1640 msleep(100);
1641
1642 continue;
1643 }
1644 memset(ha->init_cb, 0, sizeof(init_cb_t));
1645
1646 /* Get consistent memory allocated for Get Port Database cmd */
1647 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1648 &ha->iodesc_pd_dma);
1649 if (ha->iodesc_pd == NULL) {
1650 /* error */
1651 qla_printk(KERN_WARNING, ha,
1652 "Memory Allocation failed - iodesc_pd\n");
1653
1654 qla2x00_mem_free(ha);
1655 msleep(100);
1656
1657 continue;
1658 }
1659 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1660
1661 /* Allocate ioctl related memory. */
1662 if (qla2x00_alloc_ioctl_mem(ha)) {
1663 qla_printk(KERN_WARNING, ha,
1664 "Memory Allocation failed - ioctl_mem\n");
1665
1666 qla2x00_mem_free(ha);
1667 msleep(100);
1668
1669 continue;
1670 }
1671
1672 if (qla2x00_allocate_sp_pool(ha)) {
1673 qla_printk(KERN_WARNING, ha,
1674 "Memory Allocation failed - "
1675 "qla2x00_allocate_sp_pool()\n");
1676
1677 qla2x00_mem_free(ha);
1678 msleep(100);
1679
1680 continue;
1681 }
1682
1683 /* Allocate memory for SNS commands */
1684 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1685 /* Get consistent memory allocated for SNS commands */
1686 ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1687 sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1688 GFP_KERNEL);
1689 if (ha->sns_cmd == NULL) {
1690 /* error */
1691 qla_printk(KERN_WARNING, ha,
1692 "Memory Allocation failed - sns_cmd\n");
1693
1694 qla2x00_mem_free(ha);
1695 msleep(100);
1696
1697 continue;
1698 }
1699 memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1700 } else {
1701 /* Get consistent memory allocated for MS IOCB */
1702 ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1703 &ha->ms_iocb_dma);
1704 if (ha->ms_iocb == NULL) {
1705 /* error */
1706 qla_printk(KERN_WARNING, ha,
1707 "Memory Allocation failed - ms_iocb\n");
1708
1709 qla2x00_mem_free(ha);
1710 msleep(100);
1711
1712 continue;
1713 }
1714 memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1715
1716 /*
1717 * Get consistent memory allocated for CT SNS
1718 * commands
1719 */
1720 ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1721 sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1722 GFP_KERNEL);
1723 if (ha->ct_sns == NULL) {
1724 /* error */
1725 qla_printk(KERN_WARNING, ha,
1726 "Memory Allocation failed - ct_sns\n");
1727
1728 qla2x00_mem_free(ha);
1729 msleep(100);
1730
1731 continue;
1732 }
1733 memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1734 }
1735
1736 /* Done all allocations without any error. */
1737 status = 0;
1738
1739 } while (retry-- && status != 0);
1740
1741 if (status) {
1742 printk(KERN_WARNING
1743 "%s(): **** FAILED ****\n", __func__);
1744 }
1745
1746 return(status);
1747 }
1748
1749 /*
1750 * qla2x00_mem_free
1751 * Frees all adapter allocated memory.
1752 *
1753 * Input:
1754 * ha = adapter block pointer.
1755 */
1756 static void
1757 qla2x00_mem_free(scsi_qla_host_t *ha)
1758 {
1759 struct list_head *fcpl, *fcptemp;
1760 fc_port_t *fcport;
1761 unsigned long wtime;/* max wait time if mbx cmd is busy. */
1762
1763 if (ha == NULL) {
1764 /* error */
1765 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1766 return;
1767 }
1768
1769 /* Make sure all other threads are stopped. */
1770 wtime = 60 * HZ;
1771 while (ha->dpc_wait && wtime) {
1772 set_current_state(TASK_INTERRUPTIBLE);
1773 wtime = schedule_timeout(wtime);
1774 }
1775
1776 /* free ioctl memory */
1777 qla2x00_free_ioctl_mem(ha);
1778
1779 /* free sp pool */
1780 qla2x00_free_sp_pool(ha);
1781
1782 if (ha->sns_cmd)
1783 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1784 ha->sns_cmd, ha->sns_cmd_dma);
1785
1786 if (ha->ct_sns)
1787 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1788 ha->ct_sns, ha->ct_sns_dma);
1789
1790 if (ha->ms_iocb)
1791 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1792
1793 if (ha->iodesc_pd)
1794 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1795
1796 if (ha->init_cb)
1797 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1798
1799 if (ha->s_dma_pool)
1800 dma_pool_destroy(ha->s_dma_pool);
1801
1802 if (ha->rlc_rsp)
1803 dma_free_coherent(&ha->pdev->dev,
1804 sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1805 ha->rlc_rsp_dma);
1806
1807 if (ha->gid_list)
1808 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1809 ha->gid_list_dma);
1810
1811 if (ha->response_ring)
1812 dma_free_coherent(&ha->pdev->dev,
1813 (ha->response_q_length + 1) * sizeof(response_t),
1814 ha->response_ring, ha->response_dma);
1815
1816 if (ha->request_ring)
1817 dma_free_coherent(&ha->pdev->dev,
1818 (ha->request_q_length + 1) * sizeof(request_t),
1819 ha->request_ring, ha->request_dma);
1820
1821 ha->sns_cmd = NULL;
1822 ha->sns_cmd_dma = 0;
1823 ha->ct_sns = NULL;
1824 ha->ct_sns_dma = 0;
1825 ha->ms_iocb = NULL;
1826 ha->ms_iocb_dma = 0;
1827 ha->iodesc_pd = NULL;
1828 ha->iodesc_pd_dma = 0;
1829 ha->init_cb = NULL;
1830 ha->init_cb_dma = 0;
1831
1832 ha->s_dma_pool = NULL;
1833
1834 ha->rlc_rsp = NULL;
1835 ha->rlc_rsp_dma = 0;
1836 ha->gid_list = NULL;
1837 ha->gid_list_dma = 0;
1838
1839 ha->response_ring = NULL;
1840 ha->response_dma = 0;
1841 ha->request_ring = NULL;
1842 ha->request_dma = 0;
1843
1844 list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1845 fcport = list_entry(fcpl, fc_port_t, list);
1846
1847 /* fc ports */
1848 list_del_init(&fcport->list);
1849 kfree(fcport);
1850 }
1851 INIT_LIST_HEAD(&ha->fcports);
1852
1853 if (ha->fw_dump)
1854 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1855
1856 if (ha->fw_dump_buffer)
1857 vfree(ha->fw_dump_buffer);
1858
1859 ha->fw_dump = NULL;
1860 ha->fw_dump_reading = 0;
1861 ha->fw_dump_buffer = NULL;
1862 }
1863
1864 /*
1865 * qla2x00_allocate_sp_pool
1866 * This routine is called during initialization to allocate
1867 * memory for local srb_t.
1868 *
1869 * Input:
1870 * ha = adapter block pointer.
1871 *
1872 * Context:
1873 * Kernel context.
1874 *
1875 * Note: Sets the ref_count for non Null sp to one.
1876 */
1877 static int
1878 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha)
1879 {
1880 int rval;
1881
1882 rval = QLA_SUCCESS;
1883 ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1884 mempool_free_slab, srb_cachep);
1885 if (ha->srb_mempool == NULL) {
1886 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1887 rval = QLA_FUNCTION_FAILED;
1888 }
1889 return (rval);
1890 }
1891
1892 /*
1893 * This routine frees all adapter allocated memory.
1894 *
1895 */
1896 static void
1897 qla2x00_free_sp_pool( scsi_qla_host_t *ha)
1898 {
1899 if (ha->srb_mempool) {
1900 mempool_destroy(ha->srb_mempool);
1901 ha->srb_mempool = NULL;
1902 }
1903 }
1904
1905 /**************************************************************************
1906 * qla2x00_do_dpc
1907 * This kernel thread is a task that is schedule by the interrupt handler
1908 * to perform the background processing for interrupts.
1909 *
1910 * Notes:
1911 * This task always run in the context of a kernel thread. It
1912 * is kick-off by the driver's detect code and starts up
1913 * up one per adapter. It immediately goes to sleep and waits for
1914 * some fibre event. When either the interrupt handler or
1915 * the timer routine detects a event it will one of the task
1916 * bits then wake us up.
1917 **************************************************************************/
1918 static int
1919 qla2x00_do_dpc(void *data)
1920 {
1921 DECLARE_MUTEX_LOCKED(sem);
1922 scsi_qla_host_t *ha;
1923 fc_port_t *fcport;
1924 uint8_t status;
1925 uint16_t next_loopid;
1926
1927 ha = (scsi_qla_host_t *)data;
1928
1929 lock_kernel();
1930
1931 daemonize("%s_dpc", ha->host_str);
1932 allow_signal(SIGHUP);
1933
1934 ha->dpc_wait = &sem;
1935
1936 set_user_nice(current, -20);
1937
1938 unlock_kernel();
1939
1940 complete(&ha->dpc_inited);
1941
1942 while (1) {
1943 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1944
1945 if (down_interruptible(&sem))
1946 break;
1947
1948 if (ha->dpc_should_die)
1949 break;
1950
1951 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1952
1953 /* Initialization not yet finished. Don't do anything yet. */
1954 if (!ha->flags.init_done || ha->dpc_active)
1955 continue;
1956
1957 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1958
1959 ha->dpc_active = 1;
1960
1961 if (ha->flags.mbox_busy) {
1962 ha->dpc_active = 0;
1963 continue;
1964 }
1965
1966 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1967
1968 DEBUG(printk("scsi(%ld): dpc: sched "
1969 "qla2x00_abort_isp ha = %p\n",
1970 ha->host_no, ha));
1971 if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1972 &ha->dpc_flags))) {
1973
1974 if (qla2x00_abort_isp(ha)) {
1975 /* failed. retry later */
1976 set_bit(ISP_ABORT_NEEDED,
1977 &ha->dpc_flags);
1978 }
1979 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1980 }
1981 DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1982 ha->host_no));
1983 }
1984
1985 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1986 (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1987
1988 DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1989 ha->host_no));
1990
1991 qla2x00_rst_aen(ha);
1992 clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1993 }
1994
1995 /* Retry each device up to login retry count */
1996 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1997 !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1998 atomic_read(&ha->loop_state) != LOOP_DOWN) {
1999
2000 DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
2001 ha->host_no));
2002
2003 next_loopid = 0;
2004 list_for_each_entry(fcport, &ha->fcports, list) {
2005 if (fcport->port_type != FCT_TARGET)
2006 continue;
2007
2008 /*
2009 * If the port is not ONLINE then try to login
2010 * to it if we haven't run out of retries.
2011 */
2012 if (atomic_read(&fcport->state) != FCS_ONLINE &&
2013 fcport->login_retry) {
2014
2015 fcport->login_retry--;
2016 if (fcport->flags & FCF_FABRIC_DEVICE) {
2017 if (fcport->flags &
2018 FCF_TAPE_PRESENT)
2019 qla2x00_fabric_logout(
2020 ha,
2021 fcport->loop_id);
2022 status = qla2x00_fabric_login(
2023 ha, fcport, &next_loopid);
2024 } else
2025 status =
2026 qla2x00_local_device_login(
2027 ha, fcport->loop_id);
2028
2029 if (status == QLA_SUCCESS) {
2030 fcport->old_loop_id = fcport->loop_id;
2031
2032 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
2033 ha->host_no, fcport->loop_id));
2034
2035 fcport->port_login_retry_count =
2036 ha->port_down_retry_count * PORT_RETRY_TIME;
2037 atomic_set(&fcport->state, FCS_ONLINE);
2038 atomic_set(&fcport->port_down_timer,
2039 ha->port_down_retry_count * PORT_RETRY_TIME);
2040
2041 fcport->login_retry = 0;
2042 } else if (status == 1) {
2043 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
2044 /* retry the login again */
2045 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
2046 ha->host_no,
2047 fcport->login_retry, fcport->loop_id));
2048 } else {
2049 fcport->login_retry = 0;
2050 }
2051 }
2052 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
2053 break;
2054 }
2055 DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
2056 ha->host_no));
2057 }
2058
2059 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
2060 atomic_read(&ha->loop_state) != LOOP_DOWN) {
2061
2062 clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
2063 DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
2064 ha->host_no));
2065
2066 set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2067
2068 DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2069 ha->host_no));
2070 }
2071
2072 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2073
2074 DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2075 ha->host_no));
2076
2077 if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2078 &ha->dpc_flags))) {
2079
2080 qla2x00_loop_resync(ha);
2081
2082 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2083 }
2084
2085 DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2086 ha->host_no));
2087 }
2088
2089 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2090
2091 DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2092 ha->host_no));
2093
2094 qla2x00_rescan_fcports(ha);
2095
2096 DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2097 "end.\n",
2098 ha->host_no));
2099 }
2100
2101 if (!ha->interrupts_on)
2102 qla2x00_enable_intrs(ha);
2103
2104 ha->dpc_active = 0;
2105 } /* End of while(1) */
2106
2107 DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2108
2109 /*
2110 * Make sure that nobody tries to wake us up again.
2111 */
2112 ha->dpc_wait = NULL;
2113 ha->dpc_active = 0;
2114
2115 complete_and_exit(&ha->dpc_exited, 0);
2116 }
2117
2118 /*
2119 * qla2x00_rst_aen
2120 * Processes asynchronous reset.
2121 *
2122 * Input:
2123 * ha = adapter block pointer.
2124 */
2125 static void
2126 qla2x00_rst_aen(scsi_qla_host_t *ha)
2127 {
2128 if (ha->flags.online && !ha->flags.reset_active &&
2129 !atomic_read(&ha->loop_down_timer) &&
2130 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2131 do {
2132 clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2133
2134 /*
2135 * Issue marker command only when we are going to start
2136 * the I/O.
2137 */
2138 ha->marker_needed = 1;
2139 } while (!atomic_read(&ha->loop_down_timer) &&
2140 (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2141 }
2142 }
2143
2144
2145 /*
2146 * This routine will allocate SP from the free queue
2147 * input:
2148 * scsi_qla_host_t *
2149 * output:
2150 * srb_t * or NULL
2151 */
2152 static srb_t *
2153 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2154 {
2155 srb_t *sp;
2156
2157 sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2158 if (sp)
2159 atomic_set(&sp->ref_count, 1);
2160 return (sp);
2161 }
2162
2163 static void
2164 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2165 {
2166 struct scsi_cmnd *cmd = sp->cmd;
2167
2168 if (sp->flags & SRB_DMA_VALID) {
2169 if (cmd->use_sg) {
2170 dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2171 cmd->use_sg, cmd->sc_data_direction);
2172 } else if (cmd->request_bufflen) {
2173 dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2174 cmd->request_bufflen, cmd->sc_data_direction);
2175 }
2176 sp->flags &= ~SRB_DMA_VALID;
2177 }
2178 }
2179
2180 void
2181 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2182 {
2183 struct scsi_cmnd *cmd = sp->cmd;
2184
2185 qla2x00_sp_free_dma(ha, sp);
2186
2187 CMD_SP(cmd) = NULL;
2188 mempool_free(sp, ha->srb_mempool);
2189
2190 cmd->scsi_done(cmd);
2191 }
2192
2193 /**************************************************************************
2194 * qla2x00_timer
2195 *
2196 * Description:
2197 * One second timer
2198 *
2199 * Context: Interrupt
2200 ***************************************************************************/
2201 static void
2202 qla2x00_timer(scsi_qla_host_t *ha)
2203 {
2204 unsigned long cpu_flags = 0;
2205 fc_port_t *fcport;
2206 int start_dpc = 0;
2207 int index;
2208 srb_t *sp;
2209 int t;
2210
2211 /*
2212 * Ports - Port down timer.
2213 *
2214 * Whenever, a port is in the LOST state we start decrementing its port
2215 * down timer every second until it reaches zero. Once it reaches zero
2216 * the port it marked DEAD.
2217 */
2218 t = 0;
2219 list_for_each_entry(fcport, &ha->fcports, list) {
2220 if (fcport->port_type != FCT_TARGET)
2221 continue;
2222
2223 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2224
2225 if (atomic_read(&fcport->port_down_timer) == 0)
2226 continue;
2227
2228 if (atomic_dec_and_test(&fcport->port_down_timer) != 0)
2229 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2230
2231 DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2232 "%d remainning\n",
2233 ha->host_no,
2234 t, atomic_read(&fcport->port_down_timer)));
2235 }
2236 t++;
2237 } /* End of for fcport */
2238
2239
2240 /* Loop down handler. */
2241 if (atomic_read(&ha->loop_down_timer) > 0 &&
2242 !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2243
2244 if (atomic_read(&ha->loop_down_timer) ==
2245 ha->loop_down_abort_time) {
2246
2247 DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2248 "queues before time expire\n",
2249 ha->host_no));
2250
2251 if (!IS_QLA2100(ha) && ha->link_down_timeout)
2252 atomic_set(&ha->loop_state, LOOP_DEAD);
2253
2254 /* Schedule an ISP abort to return any tape commands. */
2255 spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2256 for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2257 index++) {
2258 fc_port_t *sfcp;
2259
2260 sp = ha->outstanding_cmds[index];
2261 if (!sp)
2262 continue;
2263 sfcp = sp->fcport;
2264 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2265 continue;
2266
2267 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2268 break;
2269 }
2270 spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2271
2272 set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2273 start_dpc++;
2274 }
2275
2276 /* if the loop has been down for 4 minutes, reinit adapter */
2277 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2278 DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2279 "restarting queues.\n",
2280 ha->host_no));
2281
2282 set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2283 start_dpc++;
2284
2285 if (!(ha->device_flags & DFLG_NO_CABLE)) {
2286 DEBUG(printk("scsi(%ld): Loop down - "
2287 "aborting ISP.\n",
2288 ha->host_no));
2289 qla_printk(KERN_WARNING, ha,
2290 "Loop down - aborting ISP.\n");
2291
2292 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2293 }
2294 }
2295 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2296 ha->host_no,
2297 atomic_read(&ha->loop_down_timer)));
2298 }
2299
2300 /* Schedule the DPC routine if needed */
2301 if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2302 test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2303 start_dpc ||
2304 test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2305 test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2306 test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2307 ha->dpc_wait && !ha->dpc_active) {
2308
2309 up(ha->dpc_wait);
2310 }
2311
2312 qla2x00_restart_timer(ha, WATCH_INTERVAL);
2313 }
2314
2315 /* XXX(hch): crude hack to emulate a down_timeout() */
2316 int
2317 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2318 {
2319 const unsigned int step = HZ/10;
2320
2321 do {
2322 if (!down_trylock(sema))
2323 return 0;
2324 set_current_state(TASK_INTERRUPTIBLE);
2325 if (schedule_timeout(step))
2326 break;
2327 } while ((timeout -= step) > 0);
2328
2329 return -ETIMEDOUT;
2330 }
2331
2332 /**
2333 * qla2x00_module_init - Module initialization.
2334 **/
2335 static int __init
2336 qla2x00_module_init(void)
2337 {
2338 /* Allocate cache for SRBs. */
2339 sprintf(srb_cachep_name, "qla2xxx_srbs");
2340 srb_cachep = kmem_cache_create(srb_cachep_name, sizeof(srb_t), 0,
2341 SLAB_HWCACHE_ALIGN, NULL, NULL);
2342 if (srb_cachep == NULL) {
2343 printk(KERN_ERR
2344 "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2345 return -ENOMEM;
2346 }
2347
2348 /* Derive version string. */
2349 strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2350 #if DEBUG_QLA2100
2351 strcat(qla2x00_version_str, "-debug");
2352 #endif
2353 qla2xxx_transport_template =
2354 fc_attach_transport(&qla2xxx_transport_functions);
2355 if (!qla2xxx_transport_template)
2356 return -ENODEV;
2357
2358 printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2359 return 0;
2360 }
2361
2362 /**
2363 * qla2x00_module_exit - Module cleanup.
2364 **/
2365 static void __exit
2366 qla2x00_module_exit(void)
2367 {
2368 /* Free SRBs cache. */
2369 if (srb_cachep != NULL) {
2370 if (kmem_cache_destroy(srb_cachep) != 0) {
2371 printk(KERN_ERR
2372 "qla2xxx: Unable to free SRB cache...Memory pools "
2373 "still active?\n");
2374 }
2375 srb_cachep = NULL;
2376 }
2377
2378 fc_release_transport(qla2xxx_transport_template);
2379 }
2380
2381 module_init(qla2x00_module_init);
2382 module_exit(qla2x00_module_exit);
2383
2384 MODULE_AUTHOR("QLogic Corporation");
2385 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2386 MODULE_LICENSE("GPL");
2387 MODULE_VERSION(QLA2XXX_VERSION);
Linus' kernel tree