merge by hand (qla_os.c mismerge)
[linux-3.10.git] / drivers / scsi / qla2xxx / qla_os.c
1 /*
2  *                  QLOGIC LINUX SOFTWARE
3  *
4  * QLogic ISP2x00 device driver for Linux 2.6.x
5  * Copyright (C) 2003-2004 QLogic Corporation
6  * (www.qlogic.com)
7  *
8  * This program is free software; you can redistribute it and/or modify it
9  * under the terms of the GNU General Public License as published by the
10  * Free Software Foundation; either version 2, or (at your option) any
11  * later version.
12  *
13  * This program is distributed in the hope that it will be useful, but
14  * WITHOUT ANY WARRANTY; without even the implied warranty of
15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16  * General Public License for more details.
17  *
18  */
19 #include "qla_def.h"
20
21 #include <linux/moduleparam.h>
22 #include <linux/vmalloc.h>
23 #include <linux/smp_lock.h>
24 #include <linux/delay.h>
25
26 #include <scsi/scsi_tcq.h>
27 #include <scsi/scsicam.h>
28 #include <scsi/scsi_transport.h>
29 #include <scsi/scsi_transport_fc.h>
30
31 /*
32  * Driver version
33  */
34 char qla2x00_version_str[40];
35
36 /*
37  * SRB allocation cache
38  */
39 static kmem_cache_t *srb_cachep;
40
41 /*
42  * Ioctl related information.
43  */
44 static int num_hosts;
45
46 int ql2xlogintimeout = 20;
47 module_param(ql2xlogintimeout, int, S_IRUGO|S_IRUSR);
48 MODULE_PARM_DESC(ql2xlogintimeout,
49                 "Login timeout value in seconds.");
50
51 int qlport_down_retry = 30;
52 module_param(qlport_down_retry, int, S_IRUGO|S_IRUSR);
53 MODULE_PARM_DESC(qlport_down_retry,
54                 "Maximum number of command retries to a port that returns"
55                 "a PORT-DOWN status.");
56
57 int ql2xplogiabsentdevice;
58 module_param(ql2xplogiabsentdevice, int, S_IRUGO|S_IWUSR);
59 MODULE_PARM_DESC(ql2xplogiabsentdevice,
60                 "Option to enable PLOGI to devices that are not present after "
61                 "a Fabric scan.  This is needed for several broken switches."
62                 "Default is 0 - no PLOGI. 1 - perfom PLOGI.");
63
64 int ql2xenablezio = 0;
65 module_param(ql2xenablezio, int, S_IRUGO|S_IRUSR);
66 MODULE_PARM_DESC(ql2xenablezio,
67                 "Option to enable ZIO:If 1 then enable it otherwise" 
68                 " use the default set in the NVRAM."
69                 " Default is 0 : disabled");
70
71 int ql2xintrdelaytimer = 10;
72 module_param(ql2xintrdelaytimer, int, S_IRUGO|S_IRUSR);
73 MODULE_PARM_DESC(ql2xintrdelaytimer,
74                 "ZIO: Waiting time for Firmware before it generates an "
75                 "interrupt to the host to notify completion of request.");
76
77 int ql2xloginretrycount = 0;
78 module_param(ql2xloginretrycount, int, S_IRUGO|S_IRUSR);
79 MODULE_PARM_DESC(ql2xloginretrycount,
80                 "Specify an alternate value for the NVRAM login retry count.");
81
82 static void qla2x00_free_device(scsi_qla_host_t *);
83
84 static void qla2x00_config_dma_addressing(scsi_qla_host_t *ha);
85
86 /*
87  * SCSI host template entry points 
88  */
89 static int qla2xxx_slave_configure(struct scsi_device * device);
90 static int qla2xxx_slave_alloc(struct scsi_device *);
91 static void qla2xxx_slave_destroy(struct scsi_device *);
92 static int qla2x00_queuecommand(struct scsi_cmnd *cmd,
93                 void (*fn)(struct scsi_cmnd *));
94 static int qla2xxx_eh_abort(struct scsi_cmnd *);
95 static int qla2xxx_eh_device_reset(struct scsi_cmnd *);
96 static int qla2xxx_eh_bus_reset(struct scsi_cmnd *);
97 static int qla2xxx_eh_host_reset(struct scsi_cmnd *);
98 static int qla2x00_loop_reset(scsi_qla_host_t *ha);
99 static int qla2x00_device_reset(scsi_qla_host_t *, fc_port_t *);
100
101 static struct scsi_host_template qla2x00_driver_template = {
102         .module                 = THIS_MODULE,
103         .name                   = "qla2xxx",
104         .queuecommand           = qla2x00_queuecommand,
105
106         .eh_abort_handler       = qla2xxx_eh_abort,
107         .eh_device_reset_handler = qla2xxx_eh_device_reset,
108         .eh_bus_reset_handler   = qla2xxx_eh_bus_reset,
109         .eh_host_reset_handler  = qla2xxx_eh_host_reset,
110
111         .slave_configure        = qla2xxx_slave_configure,
112
113         .slave_alloc            = qla2xxx_slave_alloc,
114         .slave_destroy          = qla2xxx_slave_destroy,
115         .this_id                = -1,
116         .cmd_per_lun            = 3,
117         .use_clustering         = ENABLE_CLUSTERING,
118         .sg_tablesize           = SG_ALL,
119
120         /*
121          * The RISC allows for each command to transfer (2^32-1) bytes of data,
122          * which equates to 0x800000 sectors.
123          */
124         .max_sectors            = 0xFFFF,
125 };
126
127 static struct scsi_transport_template *qla2xxx_transport_template = NULL;
128
129 /* TODO Convert to inlines
130  *
131  * Timer routines
132  */
133 #define WATCH_INTERVAL          1       /* number of seconds */
134
135 static void qla2x00_timer(scsi_qla_host_t *);
136
137 static __inline__ void qla2x00_start_timer(scsi_qla_host_t *,
138     void *, unsigned long);
139 static __inline__ void qla2x00_restart_timer(scsi_qla_host_t *, unsigned long);
140 static __inline__ void qla2x00_stop_timer(scsi_qla_host_t *);
141
142 static inline void
143 qla2x00_start_timer(scsi_qla_host_t *ha, void *func, unsigned long interval)
144 {
145         init_timer(&ha->timer);
146         ha->timer.expires = jiffies + interval * HZ;
147         ha->timer.data = (unsigned long)ha;
148         ha->timer.function = (void (*)(unsigned long))func;
149         add_timer(&ha->timer);
150         ha->timer_active = 1;
151 }
152
153 static inline void
154 qla2x00_restart_timer(scsi_qla_host_t *ha, unsigned long interval)
155 {
156         mod_timer(&ha->timer, jiffies + interval * HZ);
157 }
158
159 static __inline__ void
160 qla2x00_stop_timer(scsi_qla_host_t *ha)
161 {
162         del_timer_sync(&ha->timer);
163         ha->timer_active = 0;
164 }
165
166 static int qla2x00_do_dpc(void *data);
167
168 static void qla2x00_rst_aen(scsi_qla_host_t *);
169
170 static uint8_t qla2x00_mem_alloc(scsi_qla_host_t *);
171 static void qla2x00_mem_free(scsi_qla_host_t *ha);
172 static int qla2x00_allocate_sp_pool( scsi_qla_host_t *ha);
173 static void qla2x00_free_sp_pool(scsi_qla_host_t *ha);
174 static srb_t *qla2x00_get_new_sp(scsi_qla_host_t *);
175 static void qla2x00_sp_free_dma(scsi_qla_host_t *, srb_t *);
176 void qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *);
177
178 /* -------------------------------------------------------------------------- */
179
180 static char *
181 qla2x00_get_pci_info_str(struct scsi_qla_host *ha, char *str)
182 {
183         static char *pci_bus_modes[] = {
184                 "33", "66", "100", "133",
185         };
186         uint16_t pci_bus;
187
188         strcpy(str, "PCI");
189         pci_bus = (ha->pci_attr & (BIT_9 | BIT_10)) >> 9;
190         if (pci_bus) {
191                 strcat(str, "-X (");
192                 strcat(str, pci_bus_modes[pci_bus]);
193         } else {
194                 pci_bus = (ha->pci_attr & BIT_8) >> 8;
195                 strcat(str, " (");
196                 strcat(str, pci_bus_modes[pci_bus]);
197         }
198         strcat(str, " MHz)");
199
200         return (str);
201 }
202
203 char *
204 qla2x00_get_fw_version_str(struct scsi_qla_host *ha, char *str)
205 {
206         char un_str[10];
207         
208         sprintf(str, "%d.%02d.%02d ", ha->fw_major_version,
209             ha->fw_minor_version,
210             ha->fw_subminor_version);
211
212         if (ha->fw_attributes & BIT_9) {
213                 strcat(str, "FLX");
214                 return (str);
215         }
216
217         switch (ha->fw_attributes & 0xFF) {
218         case 0x7:
219                 strcat(str, "EF");
220                 break;
221         case 0x17:
222                 strcat(str, "TP");
223                 break;
224         case 0x37:
225                 strcat(str, "IP");
226                 break;
227         case 0x77:
228                 strcat(str, "VI");
229                 break;
230         default:
231                 sprintf(un_str, "(%x)", ha->fw_attributes);
232                 strcat(str, un_str);
233                 break;
234         }
235         if (ha->fw_attributes & 0x100)
236                 strcat(str, "X");
237
238         return (str);
239 }
240
241 /**************************************************************************
242 * qla2x00_queuecommand
243 *
244 * Description:
245 *     Queue a command to the controller.
246 *
247 * Input:
248 *     cmd - pointer to Scsi cmd structure
249 *     fn - pointer to Scsi done function
250 *
251 * Returns:
252 *   0 - Always
253 *
254 * Note:
255 * The mid-level driver tries to ensures that queuecommand never gets invoked
256 * concurrently with itself or the interrupt handler (although the
257 * interrupt handler may call this routine as part of request-completion
258 * handling).
259 **************************************************************************/
260 static int
261 qla2x00_queuecommand(struct scsi_cmnd *cmd, void (*done)(struct scsi_cmnd *))
262 {
263         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
264         fc_port_t *fcport = (struct fc_port *) cmd->device->hostdata;
265         srb_t *sp;
266         int rval;
267
268         if (!fcport) {
269                 cmd->result = DID_NO_CONNECT << 16;
270                 goto qc_fail_command;
271         }
272
273         if (atomic_read(&fcport->state) != FCS_ONLINE) {
274                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD ||
275                     atomic_read(&ha->loop_state) == LOOP_DEAD) {
276                         cmd->result = DID_NO_CONNECT << 16;
277                         goto qc_fail_command;
278                 }
279                 goto qc_host_busy;
280         }
281
282         spin_unlock_irq(ha->host->host_lock);
283
284         /* Allocate a command packet from the "sp" pool. */
285         if ((sp = qla2x00_get_new_sp(ha)) == NULL) {
286                 goto qc_host_busy_lock;
287         }
288
289         sp->ha = ha;
290         sp->fcport = fcport;
291         sp->cmd = cmd;
292         sp->flags = 0;
293
294         CMD_SP(cmd) = (void *)sp;
295         cmd->scsi_done = done;
296
297         rval = qla2x00_start_scsi(sp);
298         if (rval != QLA_SUCCESS)
299                 goto qc_host_busy_free_sp;
300
301         /* Manage unprocessed RIO/ZIO commands in response queue. */
302         if (ha->flags.online && ha->flags.process_response_queue &&
303             ha->response_ring_ptr->signature != RESPONSE_PROCESSED) {
304                 unsigned long flags;
305
306                 spin_lock_irqsave(&ha->hardware_lock, flags);
307                 qla2x00_process_response_queue(ha);
308                 spin_unlock_irqrestore(&ha->hardware_lock, flags);
309         }
310
311         spin_lock_irq(ha->host->host_lock);
312
313         return 0;
314
315 qc_host_busy_free_sp:
316         qla2x00_sp_free_dma(ha, sp);
317         CMD_SP(cmd) = NULL;
318         mempool_free(sp, ha->srb_mempool);
319
320 qc_host_busy_lock:
321         spin_lock_irq(ha->host->host_lock);
322
323 qc_host_busy:
324         return SCSI_MLQUEUE_HOST_BUSY;
325
326 qc_fail_command:
327         done(cmd);
328
329         return 0;
330 }
331
332 /*
333  * qla2x00_eh_wait_on_command
334  *    Waits for the command to be returned by the Firmware for some
335  *    max time.
336  *
337  * Input:
338  *    ha = actual ha whose done queue will contain the command
339  *            returned by firmware.
340  *    cmd = Scsi Command to wait on.
341  *    flag = Abort/Reset(Bus or Device Reset)
342  *
343  * Return:
344  *    Not Found : 0
345  *    Found : 1
346  */
347 static int
348 qla2x00_eh_wait_on_command(scsi_qla_host_t *ha, struct scsi_cmnd *cmd)
349 {
350 #define ABORT_POLLING_PERIOD    HZ
351 #define ABORT_WAIT_ITER         ((10 * HZ) / (ABORT_POLLING_PERIOD))
352         unsigned long wait_iter = ABORT_WAIT_ITER;
353         int ret = QLA_SUCCESS;
354
355         while (CMD_SP(cmd)) {
356                 set_current_state(TASK_UNINTERRUPTIBLE);
357                 schedule_timeout(ABORT_POLLING_PERIOD);
358
359                 if (--wait_iter)
360                         break;
361         }
362         if (CMD_SP(cmd))
363                 ret = QLA_FUNCTION_FAILED;
364
365         return ret;
366 }
367
368 /*
369  * qla2x00_wait_for_hba_online
370  *    Wait till the HBA is online after going through 
371  *    <= MAX_RETRIES_OF_ISP_ABORT  or
372  *    finally HBA is disabled ie marked offline
373  *
374  * Input:
375  *     ha - pointer to host adapter structure
376  * 
377  * Note:    
378  *    Does context switching-Release SPIN_LOCK
379  *    (if any) before calling this routine.
380  *
381  * Return:
382  *    Success (Adapter is online) : 0
383  *    Failed  (Adapter is offline/disabled) : 1
384  */
385 static int 
386 qla2x00_wait_for_hba_online(scsi_qla_host_t *ha)
387 {
388         int      return_status;
389         unsigned long wait_online;
390
391         wait_online = jiffies + (MAX_LOOP_TIMEOUT * HZ); 
392         while (((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) ||
393             test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags) ||
394             test_bit(ISP_ABORT_RETRY, &ha->dpc_flags) ||
395             ha->dpc_active) && time_before(jiffies, wait_online)) {
396
397                 msleep(1000);
398         }
399         if (ha->flags.online) 
400                 return_status = QLA_SUCCESS; 
401         else
402                 return_status = QLA_FUNCTION_FAILED;
403
404         DEBUG2(printk("%s return_status=%d\n",__func__,return_status));
405
406         return (return_status);
407 }
408
409 /*
410  * qla2x00_wait_for_loop_ready
411  *    Wait for MAX_LOOP_TIMEOUT(5 min) value for loop
412  *    to be in LOOP_READY state.         
413  * Input:
414  *     ha - pointer to host adapter structure
415  * 
416  * Note:    
417  *    Does context switching-Release SPIN_LOCK
418  *    (if any) before calling this routine.
419  *    
420  *
421  * Return:
422  *    Success (LOOP_READY) : 0
423  *    Failed  (LOOP_NOT_READY) : 1
424  */
425 static inline int 
426 qla2x00_wait_for_loop_ready(scsi_qla_host_t *ha)
427 {
428         int      return_status = QLA_SUCCESS;
429         unsigned long loop_timeout ;
430
431         /* wait for 5 min at the max for loop to be ready */
432         loop_timeout = jiffies + (MAX_LOOP_TIMEOUT * HZ); 
433
434         while ((!atomic_read(&ha->loop_down_timer) &&
435             atomic_read(&ha->loop_state) == LOOP_DOWN) ||
436             atomic_read(&ha->loop_state) != LOOP_READY) {
437                 msleep(1000);
438                 if (time_after_eq(jiffies, loop_timeout)) {
439                         return_status = QLA_FUNCTION_FAILED;
440                         break;
441                 }
442         }
443         return (return_status); 
444 }
445
446 /**************************************************************************
447 * qla2xxx_eh_abort
448 *
449 * Description:
450 *    The abort function will abort the specified command.
451 *
452 * Input:
453 *    cmd = Linux SCSI command packet to be aborted.
454 *
455 * Returns:
456 *    Either SUCCESS or FAILED.
457 *
458 * Note:
459 **************************************************************************/
460 int
461 qla2xxx_eh_abort(struct scsi_cmnd *cmd)
462 {
463         scsi_qla_host_t *ha = to_qla_host(cmd->device->host);
464         srb_t *sp;
465         int ret, i;
466         unsigned int id, lun;
467         unsigned long serial;
468         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);