973871833e328f0e4dbc4b70ebf6b452ae825c91
[linux-2.6.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_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_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 (ha->isp_ops.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                                 ha->isp_ops.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 ha->isp_ops.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
993         /*
994          * Given the two variants pci_set_dma_mask(), allow the compiler to
995          * assist in setting the proper dma mask.
996          */
997         if (sizeof(dma_addr_t) > 4) {
998                 if (pci_set_dma_mask(ha->pdev, DMA_64BIT_MASK) == 0) {
999                         ha->flags.enable_64bit_addressing = 1;
1000                         ha->isp_ops.calc_req_entries = qla2x00_calc_iocbs_64;
1001                         ha->isp_ops.build_iocbs = qla2x00_build_scsi_iocbs_64;
1002
1003                         if (pci_set_consistent_dma_mask(ha->pdev,
1004                             DMA_64BIT_MASK)) {
1005                                 qla_printk(KERN_DEBUG, ha, 
1006                                     "Failed to set 64 bit PCI consistent mask; "
1007                                     "using 32 bit.\n");
1008                                 pci_set_consistent_dma_mask(ha->pdev,
1009                                     DMA_32BIT_MASK);
1010                         }
1011                 } else {
1012                         qla_printk(KERN_DEBUG, ha,
1013                             "Failed to set 64 bit PCI DMA mask, falling back "
1014                             "to 32 bit MASK.\n");
1015                         pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1016                 }
1017         } else {
1018                 pci_set_dma_mask(ha->pdev, DMA_32BIT_MASK);
1019         }
1020 }
1021
1022 static int
1023 qla2x00_iospace_config(scsi_qla_host_t *ha)
1024 {
1025         unsigned long   pio, pio_len, pio_flags;
1026         unsigned long   mmio, mmio_len, mmio_flags;
1027
1028         /* We only need PIO for Flash operations on ISP2312 v2 chips. */
1029         pio = pci_resource_start(ha->pdev, 0);
1030         pio_len = pci_resource_len(ha->pdev, 0);
1031         pio_flags = pci_resource_flags(ha->pdev, 0);
1032         if (pio_flags & IORESOURCE_IO) {
1033                 if (pio_len < MIN_IOBASE_LEN) {
1034                         qla_printk(KERN_WARNING, ha,
1035                             "Invalid PCI I/O region size (%s)...\n",
1036                                 pci_name(ha->pdev));
1037                         pio = 0;
1038                 }
1039         } else {
1040                 qla_printk(KERN_WARNING, ha,
1041                     "region #0 not a PIO resource (%s)...\n",
1042                     pci_name(ha->pdev));
1043                 pio = 0;
1044         }
1045
1046         /* Use MMIO operations for all accesses. */
1047         mmio = pci_resource_start(ha->pdev, 1);
1048         mmio_len = pci_resource_len(ha->pdev, 1);
1049         mmio_flags = pci_resource_flags(ha->pdev, 1);
1050
1051         if (!(mmio_flags & IORESOURCE_MEM)) {
1052                 qla_printk(KERN_ERR, ha,
1053                     "region #0 not an MMIO resource (%s), aborting\n",
1054                     pci_name(ha->pdev));
1055                 goto iospace_error_exit;
1056         }
1057         if (mmio_len < MIN_IOBASE_LEN) {
1058                 qla_printk(KERN_ERR, ha,
1059                     "Invalid PCI mem region size (%s), aborting\n",
1060                         pci_name(ha->pdev));
1061                 goto iospace_error_exit;
1062         }
1063
1064         if (pci_request_regions(ha->pdev, ha->brd_info->drv_name)) {
1065                 qla_printk(KERN_WARNING, ha,
1066                     "Failed to reserve PIO/MMIO regions (%s)\n",
1067                     pci_name(ha->pdev));
1068
1069                 goto iospace_error_exit;
1070         }
1071
1072         ha->pio_address = pio;
1073         ha->pio_length = pio_len;
1074         ha->iobase = ioremap(mmio, MIN_IOBASE_LEN);
1075         if (!ha->iobase) {
1076                 qla_printk(KERN_ERR, ha,
1077                     "cannot remap MMIO (%s), aborting\n", pci_name(ha->pdev));
1078
1079                 goto iospace_error_exit;
1080         }
1081
1082         return (0);
1083
1084 iospace_error_exit:
1085         return (-ENOMEM);
1086 }
1087
1088 static void
1089 qla2x00_enable_intrs(scsi_qla_host_t *ha)
1090 {
1091         unsigned long flags = 0;
1092         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
1093
1094         spin_lock_irqsave(&ha->hardware_lock, flags);
1095         ha->interrupts_on = 1;
1096         /* enable risc and host interrupts */
1097         WRT_REG_WORD(&reg->ictrl, ICR_EN_INT | ICR_EN_RISC);
1098         RD_REG_WORD(&reg->ictrl);
1099         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1100
1101 }
1102
1103 static void
1104 qla2x00_disable_intrs(scsi_qla_host_t *ha)
1105 {
1106         unsigned long flags = 0;
1107         struct device_reg_2xxx __iomem *reg = &ha->iobase->isp;
1108
1109         spin_lock_irqsave(&ha->hardware_lock, flags);
1110         ha->interrupts_on = 0;
1111         /* disable risc and host interrupts */
1112         WRT_REG_WORD(&reg->ictrl, 0);
1113         RD_REG_WORD(&reg->ictrl);
1114         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1115 }
1116
1117 /*
1118  * PCI driver interface
1119  */
1120 int qla2x00_probe_one(struct pci_dev *pdev, struct qla_board_info *brd_info)
1121 {
1122         int     ret = -ENODEV;
1123         struct device_reg_2xxx __iomem *reg;
1124         struct Scsi_Host *host;
1125         scsi_qla_host_t *ha;
1126         unsigned long   flags = 0;
1127         unsigned long   wait_switch = 0;
1128         char pci_info[20];
1129         char fw_str[30];
1130         fc_port_t *fcport;
1131
1132         if (pci_enable_device(pdev))
1133                 goto probe_out;
1134
1135         host = scsi_host_alloc(&qla2x00_driver_template,
1136             sizeof(scsi_qla_host_t));
1137         if (host == NULL) {
1138                 printk(KERN_WARNING
1139                     "qla2xxx: Couldn't allocate host from scsi layer!\n");
1140                 goto probe_disable_device;
1141         }
1142
1143         /* Clear our data area */
1144         ha = (scsi_qla_host_t *)host->hostdata;
1145         memset(ha, 0, sizeof(scsi_qla_host_t));
1146
1147         ha->pdev = pdev;
1148         ha->host = host;
1149         ha->host_no = host->host_no;
1150         ha->brd_info = brd_info;
1151         sprintf(ha->host_str, "%s_%ld", ha->brd_info->drv_name, ha->host_no);
1152
1153         /* Configure PCI I/O space */
1154         ret = qla2x00_iospace_config(ha);
1155         if (ret)
1156                 goto probe_failed;
1157
1158         /* Sanitize the information from PCI BIOS. */
1159         host->irq = pdev->irq;
1160
1161         qla_printk(KERN_INFO, ha,
1162             "Found an %s, irq %d, iobase 0x%p\n", ha->brd_info->isp_name,
1163             host->irq, ha->iobase);
1164
1165         spin_lock_init(&ha->hardware_lock);
1166
1167         ha->prev_topology = 0;
1168         ha->ports = MAX_BUSES;
1169
1170         /* Assign ISP specific operations. */
1171         ha->isp_ops.pci_config          = qla2100_pci_config;
1172         ha->isp_ops.reset_chip          = qla2x00_reset_chip;
1173         ha->isp_ops.chip_diag           = qla2x00_chip_diag;
1174         ha->isp_ops.config_rings        = qla2x00_config_rings;
1175         ha->isp_ops.reset_adapter       = qla2x00_reset_adapter;
1176         ha->isp_ops.nvram_config        = qla2x00_nvram_config;
1177         ha->isp_ops.update_fw_options   = qla2x00_update_fw_options;
1178         ha->isp_ops.load_risc           = qla2x00_load_risc;
1179         ha->isp_ops.pci_info_str        = qla2x00_pci_info_str;
1180         ha->isp_ops.fw_version_str      = qla2x00_fw_version_str;
1181         ha->isp_ops.intr_handler        = qla2100_intr_handler;
1182         ha->isp_ops.enable_intrs        = qla2x00_enable_intrs;
1183         ha->isp_ops.disable_intrs       = qla2x00_disable_intrs;
1184         ha->isp_ops.abort_command       = qla2x00_abort_command;
1185         ha->isp_ops.abort_target        = qla2x00_abort_target;
1186         ha->isp_ops.fabric_login        = qla2x00_login_fabric;
1187         ha->isp_ops.fabric_logout       = qla2x00_fabric_logout;
1188         ha->isp_ops.calc_req_entries    = qla2x00_calc_iocbs_32;
1189         ha->isp_ops.build_iocbs         = qla2x00_build_scsi_iocbs_32;
1190         ha->isp_ops.prep_ms_iocb        = qla2x00_prep_ms_iocb;
1191         ha->isp_ops.read_nvram          = qla2x00_read_nvram_data;
1192         ha->isp_ops.write_nvram         = qla2x00_write_nvram_data;
1193         ha->isp_ops.fw_dump             = qla2100_fw_dump;
1194         ha->isp_ops.ascii_fw_dump       = qla2100_ascii_fw_dump;
1195         if (IS_QLA2100(ha)) {
1196                 host->max_id = MAX_TARGETS_2100;
1197                 ha->mbx_count = MAILBOX_REGISTER_COUNT_2100;
1198                 ha->request_q_length = REQUEST_ENTRY_CNT_2100;
1199                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1200                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1201                 host->sg_tablesize = 32;
1202                 ha->gid_list_info_size = 4;
1203         } else if (IS_QLA2200(ha)) {
1204                 host->max_id = MAX_TARGETS_2200;
1205                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1206                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1207                 ha->response_q_length = RESPONSE_ENTRY_CNT_2100;
1208                 ha->last_loop_id = SNS_LAST_LOOP_ID_2100;
1209                 ha->gid_list_info_size = 4;
1210         } else /*if (IS_QLA2300(ha))*/ {
1211                 host->max_id = MAX_TARGETS_2200;
1212                 ha->mbx_count = MAILBOX_REGISTER_COUNT;
1213                 ha->request_q_length = REQUEST_ENTRY_CNT_2200;
1214                 ha->response_q_length = RESPONSE_ENTRY_CNT_2300;
1215                 ha->last_loop_id = SNS_LAST_LOOP_ID_2300;
1216                 ha->isp_ops.pci_config = qla2300_pci_config;
1217                 ha->isp_ops.intr_handler = qla2300_intr_handler;
1218                 ha->isp_ops.fw_dump = qla2300_fw_dump;
1219                 ha->isp_ops.ascii_fw_dump = qla2300_ascii_fw_dump;
1220                 ha->gid_list_info_size = 6;
1221         }
1222         host->can_queue = ha->request_q_length + 128;
1223
1224         /* load the F/W, read paramaters, and init the H/W */
1225         ha->instance = num_hosts;
1226
1227         init_MUTEX(&ha->mbx_cmd_sem);
1228         init_MUTEX_LOCKED(&ha->mbx_intr_sem);
1229
1230         INIT_LIST_HEAD(&ha->list);
1231         INIT_LIST_HEAD(&ha->fcports);
1232         INIT_LIST_HEAD(&ha->rscn_fcports);
1233
1234         /*
1235          * These locks are used to prevent more than one CPU
1236          * from modifying the queue at the same time. The
1237          * higher level "host_lock" will reduce most
1238          * contention for these locks.
1239          */
1240         spin_lock_init(&ha->mbx_reg_lock);
1241
1242         ha->dpc_pid = -1;
1243         init_completion(&ha->dpc_inited);
1244         init_completion(&ha->dpc_exited);
1245
1246         qla2x00_config_dma_addressing(ha);
1247         if (qla2x00_mem_alloc(ha)) {
1248                 qla_printk(KERN_WARNING, ha,
1249                     "[ERROR] Failed to allocate memory for adapter\n");
1250
1251                 ret = -ENOMEM;
1252                 goto probe_failed;
1253         }
1254
1255         if (qla2x00_initialize_adapter(ha) &&
1256             !(ha->device_flags & DFLG_NO_CABLE)) {
1257
1258                 qla_printk(KERN_WARNING, ha,
1259                     "Failed to initialize adapter\n");
1260
1261                 DEBUG2(printk("scsi(%ld): Failed to initialize adapter - "
1262                     "Adapter flags %x.\n",
1263                     ha->host_no, ha->device_flags));
1264
1265                 ret = -ENODEV;
1266                 goto probe_failed;
1267         }
1268
1269         /*
1270          * Startup the kernel thread for this host adapter
1271          */
1272         ha->dpc_should_die = 0;
1273         ha->dpc_pid = kernel_thread(qla2x00_do_dpc, ha, 0);
1274         if (ha->dpc_pid < 0) {
1275                 qla_printk(KERN_WARNING, ha,
1276                     "Unable to start DPC thread!\n");
1277
1278                 ret = -ENODEV;
1279                 goto probe_failed;
1280         }
1281         wait_for_completion(&ha->dpc_inited);
1282
1283         host->this_id = 255;
1284         host->cmd_per_lun = 3;
1285         host->unique_id = ha->instance;
1286         host->max_cmd_len = MAX_CMDSZ;
1287         host->max_channel = ha->ports - 1;
1288         host->max_lun = MAX_LUNS;
1289         host->transportt = qla2xxx_transport_template;
1290
1291         ret = request_irq(host->irq, ha->isp_ops.intr_handler,
1292             SA_INTERRUPT|SA_SHIRQ, ha->brd_info->drv_name, ha);
1293         if (ret) {
1294                 qla_printk(KERN_WARNING, ha,
1295                     "Failed to reserve interrupt %d already in use.\n",
1296                     host->irq);
1297                 goto probe_failed;
1298         }
1299
1300         /* Initialized the timer */
1301         qla2x00_start_timer(ha, qla2x00_timer, WATCH_INTERVAL);
1302
1303         DEBUG2(printk("DEBUG: detect hba %ld at address = %p\n",
1304             ha->host_no, ha));
1305
1306         reg = &ha->iobase->isp;
1307
1308         ha->isp_ops.disable_intrs(ha);
1309
1310         /* Ensure mailbox registers are free. */
1311         spin_lock_irqsave(&ha->hardware_lock, flags);
1312         WRT_REG_WORD(&reg->semaphore, 0);
1313         WRT_REG_WORD(&reg->hccr, HCCR_CLR_RISC_INT);
1314         WRT_REG_WORD(&reg->hccr, HCCR_CLR_HOST_INT);
1315
1316         /* Enable proper parity */
1317         if (!IS_QLA2100(ha) && !IS_QLA2200(ha)) {
1318                 if (IS_QLA2300(ha))
1319                         /* SRAM parity */
1320                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x1));
1321                 else
1322                         /* SRAM, Instruction RAM and GP RAM parity */
1323                         WRT_REG_WORD(&reg->hccr, (HCCR_ENABLE_PARITY + 0x7));
1324         }
1325         spin_unlock_irqrestore(&ha->hardware_lock, flags);
1326
1327         ha->isp_ops.enable_intrs(ha);
1328
1329         /* v2.19.5b6 */
1330         /*
1331          * Wait around max loop_reset_delay secs for the devices to come
1332          * on-line. We don't want Linux scanning before we are ready.
1333          *
1334          */
1335         for (wait_switch = jiffies + (ha->loop_reset_delay * HZ);
1336             time_before(jiffies,wait_switch) &&
1337              !(ha->device_flags & (DFLG_NO_CABLE | DFLG_FABRIC_DEVICES))
1338              && (ha->device_flags & SWITCH_FOUND) ;) {
1339
1340                 qla2x00_check_fabric_devices(ha);
1341
1342                 msleep(10);
1343         }
1344
1345         pci_set_drvdata(pdev, ha);
1346         ha->flags.init_done = 1;
1347         num_hosts++;
1348
1349         ret = scsi_add_host(host, &pdev->dev);
1350         if (ret)
1351                 goto probe_failed;
1352
1353         qla2x00_alloc_sysfs_attr(ha);
1354
1355         qla2x00_init_host_attr(ha);
1356
1357         qla_printk(KERN_INFO, ha, "\n"
1358             " QLogic Fibre Channel HBA Driver: %s\n"
1359             "  QLogic %s - %s\n"
1360             "  %s: %s @ %s hdma%c, host#=%ld, fw=%s\n", qla2x00_version_str,
1361             ha->model_number, ha->model_desc ? ha->model_desc: "",
1362             ha->brd_info->isp_name, ha->isp_ops.pci_info_str(ha, pci_info),
1363             pci_name(ha->pdev), ha->flags.enable_64bit_addressing ? '+': '-',
1364             ha->host_no, ha->isp_ops.fw_version_str(ha, fw_str));
1365
1366         /* Go with fc_rport registration. */
1367         list_for_each_entry(fcport, &ha->fcports, list)
1368                 qla2x00_reg_remote_port(ha, fcport);
1369
1370         return 0;
1371
1372 probe_failed:
1373         fc_remove_host(ha->host);
1374
1375         qla2x00_free_device(ha);
1376
1377         scsi_host_put(host);
1378
1379 probe_disable_device:
1380         pci_disable_device(pdev);
1381
1382 probe_out:
1383         return ret;
1384 }
1385 EXPORT_SYMBOL_GPL(qla2x00_probe_one);
1386
1387 void qla2x00_remove_one(struct pci_dev *pdev)
1388 {
1389         scsi_qla_host_t *ha;
1390
1391         ha = pci_get_drvdata(pdev);
1392
1393         qla2x00_free_sysfs_attr(ha);
1394
1395         fc_remove_host(ha->host);
1396
1397         scsi_remove_host(ha->host);
1398
1399         qla2x00_free_device(ha);
1400
1401         scsi_host_put(ha->host);
1402
1403         pci_set_drvdata(pdev, NULL);
1404 }
1405 EXPORT_SYMBOL_GPL(qla2x00_remove_one);
1406
1407 static void
1408 qla2x00_free_device(scsi_qla_host_t *ha)
1409 {
1410         int ret;
1411
1412         /* Abort any outstanding IO descriptors. */
1413         if (!IS_QLA2100(ha) && !IS_QLA2200(ha))
1414                 qla2x00_cancel_io_descriptors(ha);
1415
1416         /* turn-off interrupts on the card */
1417         if (ha->interrupts_on)
1418                 ha->isp_ops.disable_intrs(ha);
1419
1420         /* Disable timer */
1421         if (ha->timer_active)
1422                 qla2x00_stop_timer(ha);
1423
1424         /* Kill the kernel thread for this host */
1425         if (ha->dpc_pid >= 0) {
1426                 ha->dpc_should_die = 1;
1427                 wmb();
1428                 ret = kill_proc(ha->dpc_pid, SIGHUP, 1);
1429                 if (ret) {
1430                         qla_printk(KERN_ERR, ha,
1431                             "Unable to signal DPC thread -- (%d)\n", ret);
1432
1433                         /* TODO: SOMETHING MORE??? */
1434                 } else {
1435                         wait_for_completion(&ha->dpc_exited);
1436                 }
1437         }
1438
1439         qla2x00_mem_free(ha);
1440
1441
1442         ha->flags.online = 0;
1443
1444         /* Detach interrupts */
1445         if (ha->pdev->irq)
1446                 free_irq(ha->pdev->irq, ha);
1447
1448         /* release io space registers  */
1449         if (ha->iobase)
1450                 iounmap(ha->iobase);
1451         pci_release_regions(ha->pdev);
1452
1453         pci_disable_device(ha->pdev);
1454 }
1455
1456 /*
1457  * qla2x00_mark_device_lost Updates fcport state when device goes offline.
1458  *
1459  * Input: ha = adapter block pointer.  fcport = port structure pointer.
1460  *
1461  * Return: None.
1462  *
1463  * Context:
1464  */
1465 void qla2x00_mark_device_lost(scsi_qla_host_t *ha, fc_port_t *fcport,
1466     int do_login)
1467 {
1468         if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1469                 fc_remote_port_block(fcport->rport);
1470         /* 
1471          * We may need to retry the login, so don't change the state of the
1472          * port but do the retries.
1473          */
1474         if (atomic_read(&fcport->state) != FCS_DEVICE_DEAD)
1475                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1476
1477         if (!do_login)
1478                 return;
1479
1480         if (fcport->login_retry == 0) {
1481                 fcport->login_retry = ha->login_retry_count;
1482                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
1483
1484                 DEBUG(printk("scsi(%ld): Port login retry: "
1485                     "%02x%02x%02x%02x%02x%02x%02x%02x, "
1486                     "id = 0x%04x retry cnt=%d\n",
1487                     ha->host_no,
1488                     fcport->port_name[0],
1489                     fcport->port_name[1],
1490                     fcport->port_name[2],
1491                     fcport->port_name[3],
1492                     fcport->port_name[4],
1493                     fcport->port_name[5],
1494                     fcport->port_name[6],
1495                     fcport->port_name[7],
1496                     fcport->loop_id,
1497                     fcport->login_retry));
1498         }
1499 }
1500
1501 /*
1502  * qla2x00_mark_all_devices_lost
1503  *      Updates fcport state when device goes offline.
1504  *
1505  * Input:
1506  *      ha = adapter block pointer.
1507  *      fcport = port structure pointer.
1508  *
1509  * Return:
1510  *      None.
1511  *
1512  * Context:
1513  */
1514 void
1515 qla2x00_mark_all_devices_lost(scsi_qla_host_t *ha) 
1516 {
1517         fc_port_t *fcport;
1518
1519         list_for_each_entry(fcport, &ha->fcports, list) {
1520                 if (fcport->port_type != FCT_TARGET)
1521                         continue;
1522
1523                 /*
1524                  * No point in marking the device as lost, if the device is
1525                  * already DEAD.
1526                  */
1527                 if (atomic_read(&fcport->state) == FCS_DEVICE_DEAD)
1528                         continue;
1529                 if (atomic_read(&fcport->state) == FCS_ONLINE && fcport->rport)
1530                         fc_remote_port_block(fcport->rport);
1531                 atomic_set(&fcport->state, FCS_DEVICE_LOST);
1532         }
1533 }
1534
1535 /*
1536 * qla2x00_mem_alloc
1537 *      Allocates adapter memory.
1538 *
1539 * Returns:
1540 *      0  = success.
1541 *      1  = failure.
1542 */
1543 static uint8_t
1544 qla2x00_mem_alloc(scsi_qla_host_t *ha)
1545 {
1546         char    name[16];
1547         uint8_t   status = 1;
1548         int     retry= 10;
1549
1550         do {
1551                 /*
1552                  * This will loop only once if everything goes well, else some
1553                  * number of retries will be performed to get around a kernel
1554                  * bug where available mem is not allocated until after a
1555                  * little delay and a retry.
1556                  */
1557                 ha->request_ring = dma_alloc_coherent(&ha->pdev->dev,
1558                     (ha->request_q_length + 1) * sizeof(request_t),
1559                     &ha->request_dma, GFP_KERNEL);
1560                 if (ha->request_ring == NULL) {
1561                         qla_printk(KERN_WARNING, ha,
1562                             "Memory Allocation failed - request_ring\n");
1563
1564                         qla2x00_mem_free(ha);
1565                         msleep(100);
1566
1567                         continue;
1568                 }
1569
1570                 ha->response_ring = dma_alloc_coherent(&ha->pdev->dev,
1571                     (ha->response_q_length + 1) * sizeof(response_t),
1572                     &ha->response_dma, GFP_KERNEL);
1573                 if (ha->response_ring == NULL) {
1574                         qla_printk(KERN_WARNING, ha,
1575                             "Memory Allocation failed - response_ring\n");
1576
1577                         qla2x00_mem_free(ha);
1578                         msleep(100);
1579
1580                         continue;
1581                 }
1582
1583                 ha->gid_list = dma_alloc_coherent(&ha->pdev->dev, GID_LIST_SIZE,
1584                     &ha->gid_list_dma, GFP_KERNEL);
1585                 if (ha->gid_list == NULL) {
1586                         qla_printk(KERN_WARNING, ha,
1587                             "Memory Allocation failed - gid_list\n");
1588
1589                         qla2x00_mem_free(ha);
1590                         msleep(100);
1591
1592                         continue;
1593                 }
1594
1595                 ha->rlc_rsp = dma_alloc_coherent(&ha->pdev->dev,
1596                     sizeof(rpt_lun_cmd_rsp_t), &ha->rlc_rsp_dma, GFP_KERNEL);
1597                 if (ha->rlc_rsp == NULL) {
1598                         qla_printk(KERN_WARNING, ha,
1599                                 "Memory Allocation failed - rlc");
1600
1601                         qla2x00_mem_free(ha);
1602                         msleep(100);
1603
1604                         continue;
1605                 }
1606
1607                 snprintf(name, sizeof(name), "qla2xxx_%ld", ha->host_no);
1608                 ha->s_dma_pool = dma_pool_create(name, &ha->pdev->dev,
1609                     DMA_POOL_SIZE, 8, 0);
1610                 if (ha->s_dma_pool == NULL) {
1611                         qla_printk(KERN_WARNING, ha,
1612                             "Memory Allocation failed - s_dma_pool\n");
1613
1614                         qla2x00_mem_free(ha);
1615                         msleep(100);
1616
1617                         continue;
1618                 }
1619
1620                 /* get consistent memory allocated for init control block */
1621                 ha->init_cb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1622                     &ha->init_cb_dma);
1623                 if (ha->init_cb == NULL) {
1624                         qla_printk(KERN_WARNING, ha,
1625                             "Memory Allocation failed - init_cb\n");
1626
1627                         qla2x00_mem_free(ha);
1628                         msleep(100);
1629
1630                         continue;
1631                 }
1632                 memset(ha->init_cb, 0, sizeof(init_cb_t));
1633
1634                 /* Get consistent memory allocated for Get Port Database cmd */
1635                 ha->iodesc_pd = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1636                     &ha->iodesc_pd_dma);
1637                 if (ha->iodesc_pd == NULL) {
1638                         /* error */
1639                         qla_printk(KERN_WARNING, ha,
1640                             "Memory Allocation failed - iodesc_pd\n");
1641
1642                         qla2x00_mem_free(ha);
1643                         msleep(100);
1644
1645                         continue;
1646                 }
1647                 memset(ha->iodesc_pd, 0, PORT_DATABASE_SIZE);
1648
1649                 /* Allocate ioctl related memory. */
1650                 if (qla2x00_alloc_ioctl_mem(ha)) {
1651                         qla_printk(KERN_WARNING, ha,
1652                             "Memory Allocation failed - ioctl_mem\n");
1653
1654                         qla2x00_mem_free(ha);
1655                         msleep(100);
1656
1657                         continue;
1658                 }
1659
1660                 if (qla2x00_allocate_sp_pool(ha)) {
1661                         qla_printk(KERN_WARNING, ha,
1662                             "Memory Allocation failed - "
1663                             "qla2x00_allocate_sp_pool()\n");
1664
1665                         qla2x00_mem_free(ha);
1666                         msleep(100);
1667
1668                         continue;
1669                 }
1670
1671                 /* Allocate memory for SNS commands */
1672                 if (IS_QLA2100(ha) || IS_QLA2200(ha)) {
1673                         /* Get consistent memory allocated for SNS commands */
1674                         ha->sns_cmd = dma_alloc_coherent(&ha->pdev->dev,
1675                             sizeof(struct sns_cmd_pkt), &ha->sns_cmd_dma,
1676                             GFP_KERNEL);
1677                         if (ha->sns_cmd == NULL) {
1678                                 /* error */
1679                                 qla_printk(KERN_WARNING, ha,
1680                                     "Memory Allocation failed - sns_cmd\n");
1681
1682                                 qla2x00_mem_free(ha);
1683                                 msleep(100);
1684
1685                                 continue;
1686                         }
1687                         memset(ha->sns_cmd, 0, sizeof(struct sns_cmd_pkt));
1688                 } else {
1689                         /* Get consistent memory allocated for MS IOCB */
1690                         ha->ms_iocb = dma_pool_alloc(ha->s_dma_pool, GFP_KERNEL,
1691                             &ha->ms_iocb_dma);
1692                         if (ha->ms_iocb == NULL) {
1693                                 /* error */
1694                                 qla_printk(KERN_WARNING, ha,
1695                                     "Memory Allocation failed - ms_iocb\n");
1696
1697                                 qla2x00_mem_free(ha);
1698                                 msleep(100);
1699
1700                                 continue;
1701                         }
1702                         memset(ha->ms_iocb, 0, sizeof(ms_iocb_entry_t));
1703
1704                         /*
1705                          * Get consistent memory allocated for CT SNS
1706                          * commands
1707                          */
1708                         ha->ct_sns = dma_alloc_coherent(&ha->pdev->dev,
1709                             sizeof(struct ct_sns_pkt), &ha->ct_sns_dma,
1710                             GFP_KERNEL);
1711                         if (ha->ct_sns == NULL) {
1712                                 /* error */
1713                                 qla_printk(KERN_WARNING, ha,
1714                                     "Memory Allocation failed - ct_sns\n");
1715
1716                                 qla2x00_mem_free(ha);
1717                                 msleep(100);
1718
1719                                 continue;
1720                         }
1721                         memset(ha->ct_sns, 0, sizeof(struct ct_sns_pkt));
1722                 }
1723
1724                 /* Done all allocations without any error. */
1725                 status = 0;
1726
1727         } while (retry-- && status != 0);
1728
1729         if (status) {
1730                 printk(KERN_WARNING
1731                         "%s(): **** FAILED ****\n", __func__);
1732         }
1733
1734         return(status);
1735 }
1736
1737 /*
1738 * qla2x00_mem_free
1739 *      Frees all adapter allocated memory.
1740 *
1741 * Input:
1742 *      ha = adapter block pointer.
1743 */
1744 static void
1745 qla2x00_mem_free(scsi_qla_host_t *ha)
1746 {
1747         struct list_head        *fcpl, *fcptemp;
1748         fc_port_t       *fcport;
1749         unsigned long   wtime;/* max wait time if mbx cmd is busy. */
1750
1751         if (ha == NULL) {
1752                 /* error */
1753                 DEBUG2(printk("%s(): ERROR invalid ha pointer.\n", __func__));
1754                 return;
1755         }
1756
1757         /* Make sure all other threads are stopped. */
1758         wtime = 60 * HZ;
1759         while (ha->dpc_wait && wtime) {
1760                 set_current_state(TASK_INTERRUPTIBLE);
1761                 wtime = schedule_timeout(wtime);
1762         }
1763
1764         /* free ioctl memory */
1765         qla2x00_free_ioctl_mem(ha);
1766
1767         /* free sp pool */
1768         qla2x00_free_sp_pool(ha);
1769
1770         if (ha->sns_cmd)
1771                 dma_free_coherent(&ha->pdev->dev, sizeof(struct sns_cmd_pkt),
1772                     ha->sns_cmd, ha->sns_cmd_dma);
1773
1774         if (ha->ct_sns)
1775                 dma_free_coherent(&ha->pdev->dev, sizeof(struct ct_sns_pkt),
1776                     ha->ct_sns, ha->ct_sns_dma);
1777
1778         if (ha->ms_iocb)
1779                 dma_pool_free(ha->s_dma_pool, ha->ms_iocb, ha->ms_iocb_dma);
1780
1781         if (ha->iodesc_pd)
1782                 dma_pool_free(ha->s_dma_pool, ha->iodesc_pd, ha->iodesc_pd_dma);
1783
1784         if (ha->init_cb)
1785                 dma_pool_free(ha->s_dma_pool, ha->init_cb, ha->init_cb_dma);
1786
1787         if (ha->s_dma_pool)
1788                 dma_pool_destroy(ha->s_dma_pool);
1789
1790         if (ha->rlc_rsp)
1791                 dma_free_coherent(&ha->pdev->dev,
1792                     sizeof(rpt_lun_cmd_rsp_t), ha->rlc_rsp,
1793                     ha->rlc_rsp_dma);
1794
1795         if (ha->gid_list)
1796                 dma_free_coherent(&ha->pdev->dev, GID_LIST_SIZE, ha->gid_list,
1797                     ha->gid_list_dma);
1798
1799         if (ha->response_ring)
1800                 dma_free_coherent(&ha->pdev->dev,
1801                     (ha->response_q_length + 1) * sizeof(response_t),
1802                     ha->response_ring, ha->response_dma);
1803
1804         if (ha->request_ring)
1805                 dma_free_coherent(&ha->pdev->dev,
1806                     (ha->request_q_length + 1) * sizeof(request_t),
1807                     ha->request_ring, ha->request_dma);
1808
1809         ha->sns_cmd = NULL;
1810         ha->sns_cmd_dma = 0;
1811         ha->ct_sns = NULL;
1812         ha->ct_sns_dma = 0;
1813         ha->ms_iocb = NULL;
1814         ha->ms_iocb_dma = 0;
1815         ha->iodesc_pd = NULL;
1816         ha->iodesc_pd_dma = 0;
1817         ha->init_cb = NULL;
1818         ha->init_cb_dma = 0;
1819
1820         ha->s_dma_pool = NULL;
1821
1822         ha->rlc_rsp = NULL;
1823         ha->rlc_rsp_dma = 0;
1824         ha->gid_list = NULL;
1825         ha->gid_list_dma = 0;
1826
1827         ha->response_ring = NULL;
1828         ha->response_dma = 0;
1829         ha->request_ring = NULL;
1830         ha->request_dma = 0;
1831
1832         list_for_each_safe(fcpl, fcptemp, &ha->fcports) {
1833                 fcport = list_entry(fcpl, fc_port_t, list);
1834
1835                 /* fc ports */
1836                 list_del_init(&fcport->list);
1837                 kfree(fcport);
1838         }
1839         INIT_LIST_HEAD(&ha->fcports);
1840
1841         if (ha->fw_dump)
1842                 free_pages((unsigned long)ha->fw_dump, ha->fw_dump_order);
1843
1844         if (ha->fw_dump_buffer)
1845                 vfree(ha->fw_dump_buffer);
1846
1847         ha->fw_dump = NULL;
1848         ha->fw_dump_reading = 0;
1849         ha->fw_dump_buffer = NULL;
1850 }
1851
1852 /*
1853  * qla2x00_allocate_sp_pool
1854  *       This routine is called during initialization to allocate
1855  *       memory for local srb_t.
1856  *
1857  * Input:
1858  *       ha   = adapter block pointer.
1859  *
1860  * Context:
1861  *      Kernel context.
1862  * 
1863  * Note: Sets the ref_count for non Null sp to one.
1864  */
1865 static int
1866 qla2x00_allocate_sp_pool(scsi_qla_host_t *ha) 
1867 {
1868         int      rval;
1869
1870         rval = QLA_SUCCESS;
1871         ha->srb_mempool = mempool_create(SRB_MIN_REQ, mempool_alloc_slab,
1872             mempool_free_slab, srb_cachep);
1873         if (ha->srb_mempool == NULL) {
1874                 qla_printk(KERN_INFO, ha, "Unable to allocate SRB mempool.\n");
1875                 rval = QLA_FUNCTION_FAILED;
1876         }
1877         return (rval);
1878 }
1879
1880 /*
1881  *  This routine frees all adapter allocated memory.
1882  *  
1883  */
1884 static void
1885 qla2x00_free_sp_pool( scsi_qla_host_t *ha) 
1886 {
1887         if (ha->srb_mempool) {
1888                 mempool_destroy(ha->srb_mempool);
1889                 ha->srb_mempool = NULL;
1890         }
1891 }
1892
1893 /**************************************************************************
1894 * qla2x00_do_dpc
1895 *   This kernel thread is a task that is schedule by the interrupt handler
1896 *   to perform the background processing for interrupts.
1897 *
1898 * Notes:
1899 * This task always run in the context of a kernel thread.  It
1900 * is kick-off by the driver's detect code and starts up
1901 * up one per adapter. It immediately goes to sleep and waits for
1902 * some fibre event.  When either the interrupt handler or
1903 * the timer routine detects a event it will one of the task
1904 * bits then wake us up.
1905 **************************************************************************/
1906 static int
1907 qla2x00_do_dpc(void *data)
1908 {
1909         DECLARE_MUTEX_LOCKED(sem);
1910         scsi_qla_host_t *ha;
1911         fc_port_t       *fcport;
1912         uint8_t         status;
1913         uint16_t        next_loopid;
1914
1915         ha = (scsi_qla_host_t *)data;
1916
1917         lock_kernel();
1918
1919         daemonize("%s_dpc", ha->host_str);
1920         allow_signal(SIGHUP);
1921
1922         ha->dpc_wait = &sem;
1923
1924         set_user_nice(current, -20);
1925
1926         unlock_kernel();
1927
1928         complete(&ha->dpc_inited);
1929
1930         while (1) {
1931                 DEBUG3(printk("qla2x00: DPC handler sleeping\n"));
1932
1933                 if (down_interruptible(&sem))
1934                         break;
1935
1936                 if (ha->dpc_should_die)
1937                         break;
1938
1939                 DEBUG3(printk("qla2x00: DPC handler waking up\n"));
1940
1941                 /* Initialization not yet finished. Don't do anything yet. */
1942                 if (!ha->flags.init_done || ha->dpc_active)
1943                         continue;
1944
1945                 DEBUG3(printk("scsi(%ld): DPC handler\n", ha->host_no));
1946
1947                 ha->dpc_active = 1;
1948
1949                 if (ha->flags.mbox_busy) {
1950                         ha->dpc_active = 0;
1951                         continue;
1952                 }
1953
1954                 if (test_and_clear_bit(ISP_ABORT_NEEDED, &ha->dpc_flags)) {
1955
1956                         DEBUG(printk("scsi(%ld): dpc: sched "
1957                             "qla2x00_abort_isp ha = %p\n",
1958                             ha->host_no, ha));
1959                         if (!(test_and_set_bit(ABORT_ISP_ACTIVE,
1960                             &ha->dpc_flags))) {
1961
1962                                 if (qla2x00_abort_isp(ha)) {
1963                                         /* failed. retry later */
1964                                         set_bit(ISP_ABORT_NEEDED,
1965                                             &ha->dpc_flags);
1966                                 }
1967                                 clear_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags);
1968                         }
1969                         DEBUG(printk("scsi(%ld): dpc: qla2x00_abort_isp end\n",
1970                             ha->host_no));
1971                 }
1972
1973                 if (test_and_clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) &&
1974                     (!(test_and_set_bit(RESET_ACTIVE, &ha->dpc_flags)))) {
1975
1976                         DEBUG(printk("scsi(%ld): qla2x00_reset_marker()\n",
1977                             ha->host_no));
1978
1979                         qla2x00_rst_aen(ha);
1980                         clear_bit(RESET_ACTIVE, &ha->dpc_flags);
1981                 }
1982
1983                 /* Retry each device up to login retry count */
1984                 if ((test_and_clear_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
1985                     !test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) &&
1986                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
1987
1988                         DEBUG(printk("scsi(%ld): qla2x00_port_login()\n",
1989                             ha->host_no));
1990
1991                         next_loopid = 0;
1992                         list_for_each_entry(fcport, &ha->fcports, list) {
1993                                 if (fcport->port_type != FCT_TARGET)
1994                                         continue;
1995
1996                                 /*
1997                                  * If the port is not ONLINE then try to login
1998                                  * to it if we haven't run out of retries.
1999                                  */
2000                                 if (atomic_read(&fcport->state) != FCS_ONLINE &&
2001                                     fcport->login_retry) {
2002
2003                                         fcport->login_retry--;
2004                                         if (fcport->flags & FCF_FABRIC_DEVICE) {
2005                                                 if (fcport->flags &
2006                                                     FCF_TAPE_PRESENT)
2007                                                         ha->isp_ops.fabric_logout(
2008                                                             ha, fcport->loop_id,
2009                                                             fcport->d_id.b.domain,
2010                                                             fcport->d_id.b.area,
2011                                                             fcport->d_id.b.al_pa);
2012                                                 status = qla2x00_fabric_login(
2013                                                     ha, fcport, &next_loopid);
2014                                         } else
2015                                                 status =
2016                                                     qla2x00_local_device_login(
2017                                                         ha, fcport->loop_id);
2018
2019                                         if (status == QLA_SUCCESS) {
2020                                                 fcport->old_loop_id = fcport->loop_id;
2021
2022                                                 DEBUG(printk("scsi(%ld): port login OK: logged in ID 0x%x\n",
2023                                                     ha->host_no, fcport->loop_id));
2024                                                 
2025                                                 fcport->port_login_retry_count =
2026                                                     ha->port_down_retry_count * PORT_RETRY_TIME;
2027                                                 atomic_set(&fcport->state, FCS_ONLINE);
2028                                                 atomic_set(&fcport->port_down_timer,
2029                                                     ha->port_down_retry_count * PORT_RETRY_TIME);
2030
2031                                                 fcport->login_retry = 0;
2032                                         } else if (status == 1) {
2033                                                 set_bit(RELOGIN_NEEDED, &ha->dpc_flags);
2034                                                 /* retry the login again */
2035                                                 DEBUG(printk("scsi(%ld): Retrying %d login again loop_id 0x%x\n",
2036                                                     ha->host_no,
2037                                                     fcport->login_retry, fcport->loop_id));
2038                                         } else {
2039                                                 fcport->login_retry = 0;
2040                                         }
2041                                 }
2042                                 if (test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags))
2043                                         break;
2044                         }
2045                         DEBUG(printk("scsi(%ld): qla2x00_port_login - end\n",
2046                             ha->host_no));
2047                 }
2048
2049                 if ((test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags)) &&
2050                     atomic_read(&ha->loop_state) != LOOP_DOWN) {
2051
2052                         clear_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags);
2053                         DEBUG(printk("scsi(%ld): qla2x00_login_retry()\n",
2054                             ha->host_no));
2055                                 
2056                         set_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags);
2057
2058                         DEBUG(printk("scsi(%ld): qla2x00_login_retry - end\n",
2059                             ha->host_no));
2060                 }
2061
2062                 if (test_and_clear_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags)) {
2063
2064                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync()\n",
2065                             ha->host_no));
2066
2067                         if (!(test_and_set_bit(LOOP_RESYNC_ACTIVE,
2068                             &ha->dpc_flags))) {
2069
2070                                 qla2x00_loop_resync(ha);
2071
2072                                 clear_bit(LOOP_RESYNC_ACTIVE, &ha->dpc_flags);
2073                         }
2074
2075                         DEBUG(printk("scsi(%ld): qla2x00_loop_resync - end\n",
2076                             ha->host_no));
2077                 }
2078
2079                 if (test_and_clear_bit(FCPORT_RESCAN_NEEDED, &ha->dpc_flags)) {
2080
2081                         DEBUG(printk("scsi(%ld): Rescan flagged fcports...\n",
2082                             ha->host_no));
2083
2084                         qla2x00_rescan_fcports(ha);
2085
2086                         DEBUG(printk("scsi(%ld): Rescan flagged fcports..."
2087                             "end.\n",
2088                             ha->host_no));
2089                 }
2090
2091                 if (!ha->interrupts_on)
2092                         ha->isp_ops.enable_intrs(ha);
2093
2094                 ha->dpc_active = 0;
2095         } /* End of while(1) */
2096
2097         DEBUG(printk("scsi(%ld): DPC handler exiting\n", ha->host_no));
2098
2099         /*
2100          * Make sure that nobody tries to wake us up again.
2101          */
2102         ha->dpc_wait = NULL;
2103         ha->dpc_active = 0;
2104
2105         complete_and_exit(&ha->dpc_exited, 0);
2106 }
2107
2108 /*
2109 *  qla2x00_rst_aen
2110 *      Processes asynchronous reset.
2111 *
2112 * Input:
2113 *      ha  = adapter block pointer.
2114 */
2115 static void
2116 qla2x00_rst_aen(scsi_qla_host_t *ha) 
2117 {
2118         if (ha->flags.online && !ha->flags.reset_active &&
2119             !atomic_read(&ha->loop_down_timer) &&
2120             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags))) {
2121                 do {
2122                         clear_bit(RESET_MARKER_NEEDED, &ha->dpc_flags);
2123
2124                         /*
2125                          * Issue marker command only when we are going to start
2126                          * the I/O.
2127                          */
2128                         ha->marker_needed = 1;
2129                 } while (!atomic_read(&ha->loop_down_timer) &&
2130                     (test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags)));
2131         }
2132 }
2133
2134
2135 /*
2136  * This routine will allocate SP from the free queue
2137  * input:
2138  *        scsi_qla_host_t *
2139  * output:
2140  *        srb_t * or NULL
2141  */
2142 static srb_t *
2143 qla2x00_get_new_sp(scsi_qla_host_t *ha)
2144 {
2145         srb_t *sp;
2146
2147         sp = mempool_alloc(ha->srb_mempool, GFP_ATOMIC);
2148         if (sp)
2149                 atomic_set(&sp->ref_count, 1);
2150         return (sp);
2151 }
2152
2153 static void
2154 qla2x00_sp_free_dma(scsi_qla_host_t *ha, srb_t *sp)
2155 {
2156         struct scsi_cmnd *cmd = sp->cmd;
2157
2158         if (sp->flags & SRB_DMA_VALID) {
2159                 if (cmd->use_sg) {
2160                         dma_unmap_sg(&ha->pdev->dev, cmd->request_buffer,
2161                             cmd->use_sg, cmd->sc_data_direction);
2162                 } else if (cmd->request_bufflen) {
2163                         dma_unmap_single(&ha->pdev->dev, sp->dma_handle,
2164                             cmd->request_bufflen, cmd->sc_data_direction);
2165                 }
2166                 sp->flags &= ~SRB_DMA_VALID;
2167         }
2168 }
2169
2170 void
2171 qla2x00_sp_compl(scsi_qla_host_t *ha, srb_t *sp)
2172 {
2173         struct scsi_cmnd *cmd = sp->cmd;
2174
2175         qla2x00_sp_free_dma(ha, sp);
2176
2177         CMD_SP(cmd) = NULL;
2178         mempool_free(sp, ha->srb_mempool);
2179
2180         cmd->scsi_done(cmd);
2181 }
2182
2183 /**************************************************************************
2184 *   qla2x00_timer
2185 *
2186 * Description:
2187 *   One second timer
2188 *
2189 * Context: Interrupt
2190 ***************************************************************************/
2191 static void
2192 qla2x00_timer(scsi_qla_host_t *ha)
2193 {
2194         unsigned long   cpu_flags = 0;
2195         fc_port_t       *fcport;
2196         int             start_dpc = 0;
2197         int             index;
2198         srb_t           *sp;
2199         int             t;
2200
2201         /*
2202          * Ports - Port down timer.
2203          *
2204          * Whenever, a port is in the LOST state we start decrementing its port
2205          * down timer every second until it reaches zero. Once  it reaches zero
2206          * the port it marked DEAD. 
2207          */
2208         t = 0;
2209         list_for_each_entry(fcport, &ha->fcports, list) {
2210                 if (fcport->port_type != FCT_TARGET)
2211                         continue;
2212
2213                 if (atomic_read(&fcport->state) == FCS_DEVICE_LOST) {
2214
2215                         if (atomic_read(&fcport->port_down_timer) == 0)
2216                                 continue;
2217
2218                         if (atomic_dec_and_test(&fcport->port_down_timer) != 0) 
2219                                 atomic_set(&fcport->state, FCS_DEVICE_DEAD);
2220                         
2221                         DEBUG(printk("scsi(%ld): fcport-%d - port retry count: "
2222                             "%d remainning\n",
2223                             ha->host_no,
2224                             t, atomic_read(&fcport->port_down_timer)));
2225                 }
2226                 t++;
2227         } /* End of for fcport  */
2228
2229
2230         /* Loop down handler. */
2231         if (atomic_read(&ha->loop_down_timer) > 0 &&
2232             !(test_bit(ABORT_ISP_ACTIVE, &ha->dpc_flags)) && ha->flags.online) {
2233
2234                 if (atomic_read(&ha->loop_down_timer) ==
2235                     ha->loop_down_abort_time) {
2236
2237                         DEBUG(printk("scsi(%ld): Loop Down - aborting the "
2238                             "queues before time expire\n",
2239                             ha->host_no));
2240
2241                         if (!IS_QLA2100(ha) && ha->link_down_timeout)
2242                                 atomic_set(&ha->loop_state, LOOP_DEAD); 
2243
2244                         /* Schedule an ISP abort to return any tape commands. */
2245                         spin_lock_irqsave(&ha->hardware_lock, cpu_flags);
2246                         for (index = 1; index < MAX_OUTSTANDING_COMMANDS;
2247                             index++) {
2248                                 fc_port_t *sfcp;
2249
2250                                 sp = ha->outstanding_cmds[index];
2251                                 if (!sp)
2252                                         continue;
2253                                 sfcp = sp->fcport;
2254                                 if (!(sfcp->flags & FCF_TAPE_PRESENT))
2255                                         continue;
2256
2257                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2258                                 break;
2259                         }
2260                         spin_unlock_irqrestore(&ha->hardware_lock, cpu_flags);
2261
2262                         set_bit(ABORT_QUEUES_NEEDED, &ha->dpc_flags);
2263                         start_dpc++;
2264                 }
2265
2266                 /* if the loop has been down for 4 minutes, reinit adapter */
2267                 if (atomic_dec_and_test(&ha->loop_down_timer) != 0) {
2268                         DEBUG(printk("scsi(%ld): Loop down exceed 4 mins - "
2269                             "restarting queues.\n",
2270                             ha->host_no));
2271
2272                         set_bit(RESTART_QUEUES_NEEDED, &ha->dpc_flags);
2273                         start_dpc++;
2274
2275                         if (!(ha->device_flags & DFLG_NO_CABLE)) {
2276                                 DEBUG(printk("scsi(%ld): Loop down - "
2277                                     "aborting ISP.\n",
2278                                     ha->host_no));
2279                                 qla_printk(KERN_WARNING, ha,
2280                                     "Loop down - aborting ISP.\n");
2281
2282                                 set_bit(ISP_ABORT_NEEDED, &ha->dpc_flags);
2283                         }
2284                 }
2285                 DEBUG3(printk("scsi(%ld): Loop Down - seconds remainning %d\n",
2286                     ha->host_no,
2287                     atomic_read(&ha->loop_down_timer)));
2288         }
2289
2290         /* Schedule the DPC routine if needed */
2291         if ((test_bit(ISP_ABORT_NEEDED, &ha->dpc_flags) ||
2292             test_bit(LOOP_RESYNC_NEEDED, &ha->dpc_flags) ||
2293             start_dpc ||
2294             test_bit(LOGIN_RETRY_NEEDED, &ha->dpc_flags) ||
2295             test_bit(RESET_MARKER_NEEDED, &ha->dpc_flags) ||
2296             test_bit(RELOGIN_NEEDED, &ha->dpc_flags)) &&
2297             ha->dpc_wait && !ha->dpc_active) {
2298
2299                 up(ha->dpc_wait);
2300         }
2301
2302         qla2x00_restart_timer(ha, WATCH_INTERVAL);
2303 }
2304
2305 /* XXX(hch): crude hack to emulate a down_timeout() */
2306 int
2307 qla2x00_down_timeout(struct semaphore *sema, unsigned long timeout)
2308 {
2309         const unsigned int step = HZ/10;
2310
2311         do {
2312                 if (!down_trylock(sema))
2313                         return 0;
2314                 set_current_state(TASK_INTERRUPTIBLE);
2315                 if (schedule_timeout(step))
2316                         break;
2317         } while ((timeout -= step) > 0);
2318
2319         return -ETIMEDOUT;
2320 }
2321
2322 /**
2323  * qla2x00_module_init - Module initialization.
2324  **/
2325 static int __init
2326 qla2x00_module_init(void)
2327 {
2328         /* Allocate cache for SRBs. */
2329         srb_cachep = kmem_cache_create("qla2xxx_srbs", sizeof(srb_t), 0,
2330             SLAB_HWCACHE_ALIGN, NULL, NULL);
2331         if (srb_cachep == NULL) {
2332                 printk(KERN_ERR
2333                     "qla2xxx: Unable to allocate SRB cache...Failing load!\n");
2334                 return -ENOMEM;
2335         }
2336
2337         /* Derive version string. */
2338         strcpy(qla2x00_version_str, QLA2XXX_VERSION);
2339 #if DEBUG_QLA2100
2340         strcat(qla2x00_version_str, "-debug");
2341 #endif
2342         qla2xxx_transport_template =
2343             fc_attach_transport(&qla2xxx_transport_functions);
2344         if (!qla2xxx_transport_template)
2345                 return -ENODEV;
2346
2347         printk(KERN_INFO "QLogic Fibre Channel HBA Driver\n");
2348         return 0;
2349 }
2350
2351 /**
2352  * qla2x00_module_exit - Module cleanup.
2353  **/
2354 static void __exit
2355 qla2x00_module_exit(void)
2356 {
2357         kmem_cache_destroy(srb_cachep);
2358         fc_release_transport(qla2xxx_transport_template);
2359 }
2360
2361 module_init(qla2x00_module_init);
2362 module_exit(qla2x00_module_exit);
2363
2364 MODULE_AUTHOR("QLogic Corporation");
2365 MODULE_DESCRIPTION("QLogic Fibre Channel HBA Driver");
2366 MODULE_LICENSE("GPL");
2367 MODULE_VERSION(QLA2XXX_VERSION);