This source file includes following definitions.
- get_device_flags
- scsi_make_blocked_list
- scan_scsis_done
- scsi_luns_setup
- scan_scsis
- scsi_times_out
- request_queueable
- allocate_device
- internal_cmnd
- scsi_request_sense
- scsi_do_cmd
- check_sense
- scsi_done
- scsi_abort
- scsi_reset
- scsi_main_timeout
- update_timeout
- scsi_malloc
- scsi_free
- scsi_init_malloc
- scsi_init_free
- scsi_build_commandblocks
- scsi_dev_init
- print_inquiry
- scsi_proc_info
- resize_dma_pool
- scsi_register_host
- scsi_unregister_host
- scsi_register_device_module
- scsi_unregister_device
- scsi_register_module
- scsi_unregister_module
- scsi_dump_status
- init_module
- cleanup_module
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26
27
28 #define _SCSI_SYMS_VER_
29 #include <linux/module.h>
30
31 #include <asm/system.h>
32 #include <linux/sched.h>
33 #include <linux/timer.h>
34 #include <linux/string.h>
35 #include <linux/malloc.h>
36 #include <asm/irq.h>
37 #include <asm/dma.h>
38 #include <linux/ioport.h>
39 #include <linux/kernel.h>
40 #include<linux/stat.h>
41
42 #include <linux/blk.h>
43 #include "scsi.h"
44 #include "hosts.h"
45 #include "constants.h"
46
47 #include <linux/config.h>
48
49 #undef USE_STATIC_SCSI_MEMORY
50
51
52
53
54
55
56
57 const unsigned char scsi_command_size[8] = { 6, 10, 10, 12, 12, 12, 10, 10 };
58
59 #define INTERNAL_ERROR (panic ("Internal error in file %s, line %d.\n", __FILE__, __LINE__))
60
61 static void scsi_done (Scsi_Cmnd *SCpnt);
62 static int update_timeout (Scsi_Cmnd *, int);
63 static void print_inquiry(unsigned char *data);
64 static void scsi_times_out (Scsi_Cmnd * SCpnt, int pid);
65
66 static unsigned char * dma_malloc_freelist = NULL;
67 static int scsi_need_isa_bounce_buffers;
68 static unsigned int dma_sectors = 0;
69 unsigned int dma_free_sectors = 0;
70 unsigned int need_isa_buffer = 0;
71 static unsigned char ** dma_malloc_pages = NULL;
72
73 static int time_start;
74 static int time_elapsed;
75 static volatile struct Scsi_Host * host_active = NULL;
76 #define SCSI_BLOCK(HOST) ((HOST->block && host_active && HOST != host_active) \
77 || (HOST->can_queue && HOST->host_busy >= HOST->can_queue))
78
79 #define MAX_SCSI_DEVICE_CODE 10
80 const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE] =
81 {
82 "Direct-Access ",
83 "Sequential-Access",
84 "Printer ",
85 "Processor ",
86 "WORM ",
87 "CD-ROM ",
88 "Scanner ",
89 "Optical Device ",
90 "Medium Changer ",
91 "Communications "
92 };
93
94
95
96
97
98
99
100
101 Scsi_Device * scsi_devices = NULL;
102
103
104 unsigned long scsi_pid = 0;
105
106 static unsigned char generic_sense[6] = {REQUEST_SENSE, 0,0,0, 255, 0};
107 static void resize_dma_pool(void);
108
109
110 Scsi_Cmnd * last_cmnd = NULL;
111
112
113
114
115 extern int (* dispatch_scsi_info_ptr)(int ino, char *buffer, char **start,
116 off_t offset, int length, int inout);
117 extern int dispatch_scsi_info(int ino, char *buffer, char **start,
118 off_t offset, int length, int inout);
119
120 struct proc_dir_entry proc_scsi_scsi = {
121 PROC_SCSI_SCSI, 4, "scsi",
122 S_IFREG | S_IRUGO | S_IWUSR, 2, 0, 0, 0,
123 NULL,
124 NULL, NULL,
125 NULL, NULL, NULL
126 };
127
128
129
130
131
132
133
134
135 #define WAS_RESET 0x01
136 #define WAS_TIMEDOUT 0x02
137 #define WAS_SENSE 0x04
138 #define IS_RESETTING 0x08
139 #define IS_ABORTING 0x10
140 #define ASKED_FOR_SENSE 0x20
141
142
143
144
145
146
147
148
149
150
151
152 #ifdef DEBUG_TIMEOUT
153 static void scsi_dump_status(void);
154 #endif
155
156
157 #ifdef DEBUG
158 #define SCSI_TIMEOUT (5*HZ)
159 #else
160 #define SCSI_TIMEOUT (1*HZ)
161 #endif
162
163 #ifdef DEBUG
164 #define SENSE_TIMEOUT SCSI_TIMEOUT
165 #define ABORT_TIMEOUT SCSI_TIMEOUT
166 #define RESET_TIMEOUT SCSI_TIMEOUT
167 #else
168 #define SENSE_TIMEOUT (5*HZ/10)
169 #define RESET_TIMEOUT (5*HZ/10)
170 #define ABORT_TIMEOUT (5*HZ/10)
171 #endif
172
173 #define MIN_RESET_DELAY (1*HZ)
174
175
176 #define MIN_RESET_PERIOD (10*HZ)
177
178
179
180
181
182
183 #define BLIST_NOLUN 0x01
184 #define BLIST_FORCELUN 0x02
185 #define BLIST_BORKEN 0x04
186 #define BLIST_KEY 0x08
187 #define BLIST_SINGLELUN 0x10
188
189 struct dev_info{
190 const char * vendor;
191 const char * model;
192 const char * revision;
193 unsigned flags;
194 };
195
196
197
198
199
200
201 static struct dev_info device_list[] =
202 {
203 {"CHINON","CD-ROM CDS-431","H42", BLIST_NOLUN},
204 {"CHINON","CD-ROM CDS-535","Q14", BLIST_NOLUN},
205 {"DENON","DRD-25X","V", BLIST_NOLUN},
206 {"HITACHI","DK312C","CM81", BLIST_NOLUN},
207 {"HITACHI","DK314C","CR21" , BLIST_NOLUN},
208 {"IMS", "CDD521/10","2.06", BLIST_NOLUN},
209 {"MAXTOR","XT-3280","PR02", BLIST_NOLUN},
210 {"MAXTOR","XT-4380S","B3C", BLIST_NOLUN},
211 {"MAXTOR","MXT-1240S","I1.2", BLIST_NOLUN},
212 {"MAXTOR","XT-4170S","B5A", BLIST_NOLUN},
213 {"MAXTOR","XT-8760S","B7B", BLIST_NOLUN},
214 {"NEC","CD-ROM DRIVE:841","1.0", BLIST_NOLUN},
215 {"RODIME","RO3000S","2.33", BLIST_NOLUN},
216 {"SEAGATE", "ST157N", "\004|j", BLIST_NOLUN},
217
218
219 {"SEAGATE", "ST296","921", BLIST_NOLUN},
220 {"SONY","CD-ROM CDU-541","4.3d", BLIST_NOLUN},
221 {"SONY","CD-ROM CDU-55S","1.0i", BLIST_NOLUN},
222 {"SONY","CD-ROM CDU-561","1.7x", BLIST_NOLUN},
223 {"TANDBERG","TDC 3600","U07", BLIST_NOLUN},
224 {"TEAC","CD-ROM","1.06", BLIST_NOLUN},
225
226
227 {"TEXEL","CD-ROM","1.06", BLIST_NOLUN},
228
229
230 {"QUANTUM","LPS525S","3110", BLIST_NOLUN},
231 {"QUANTUM","PD1225S","3110", BLIST_NOLUN},
232 {"MEDIAVIS","CDR-H93MV","1.31", BLIST_NOLUN},
233 {"SANKYO", "CP525","6.64", BLIST_NOLUN},
234 {"HP", "C1750A", "3226", BLIST_NOLUN},
235 {"HP", "C1790A", "", BLIST_NOLUN},
236 {"HP", "C2500A", "", BLIST_NOLUN},
237
238
239
240
241 {"SONY","CD-ROM CDU-8001","*", BLIST_BORKEN},
242 {"TEXEL","CD-ROM","1.06", BLIST_BORKEN},
243 {"INSITE","Floptical F*8I","*", BLIST_KEY},
244 {"INSITE","I325VM","*", BLIST_KEY},
245 {"PIONEER","CD-ROMDRM-602X","*", BLIST_FORCELUN | BLIST_SINGLELUN},
246 {"PIONEER","CD-ROMDRM-604X","*", BLIST_FORCELUN | BLIST_SINGLELUN},
247
248
249
250 {NULL, NULL, NULL}
251 };
252
253 static int get_device_flags(unsigned char * response_data){
254 int i = 0;
255 unsigned char * pnt;
256 for(i=0; 1; i++){
257 if(device_list[i].vendor == NULL) return 0;
258 pnt = &response_data[8];
259 while(*pnt && *pnt == ' ') pnt++;
260 if(memcmp(device_list[i].vendor, pnt,
261 strlen(device_list[i].vendor))) continue;
262 pnt = &response_data[16];
263 while(*pnt && *pnt == ' ') pnt++;
264 if(memcmp(device_list[i].model, pnt,
265 strlen(device_list[i].model))) continue;
266 return device_list[i].flags;
267 }
268 return 0;
269 }
270
271
272
273
274
275
276
277
278
279
280 volatile int in_scan_scsis = 0;
281 static int the_result;
282
283 void scsi_make_blocked_list(void) {
284 int block_count = 0, index;
285 unsigned int flags;
286 struct Scsi_Host * sh[128], * shpnt;
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306 save_flags(flags);
307 cli();
308 host_active = NULL;
309
310 for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next) {
311
312 #if 0
313
314
315
316
317
318 if (shpnt->unchecked_isa_dma) shpnt->wish_block = 1;
319 #endif
320
321 if (shpnt->wish_block) sh[block_count++] = shpnt;
322 }
323
324 if (block_count == 1) sh[0]->block = NULL;
325
326 else if (block_count > 1) {
327
328 for(index = 0; index < block_count - 1; index++) {
329 sh[index]->block = sh[index + 1];
330 printk("scsi%d : added to blocked host list.\n",
331 sh[index]->host_no);
332 }
333
334 sh[block_count - 1]->block = sh[0];
335 printk("scsi%d : added to blocked host list.\n",
336 sh[index]->host_no);
337 }
338
339 restore_flags(flags);
340 }
341
342 static void scan_scsis_done (Scsi_Cmnd * SCpnt)
343 {
344
345 #ifdef DEBUG
346 printk ("scan_scsis_done(%p, %06x)\n", SCpnt->host, SCpnt->result);
347 #endif
348 SCpnt->request.rq_status = RQ_SCSI_DONE;
349
350 if (SCpnt->request.sem != NULL)
351 up(SCpnt->request.sem);
352 }
353
354 #ifdef CONFIG_SCSI_MULTI_LUN
355 static int max_scsi_luns = 8;
356 #else
357 static int max_scsi_luns = 1;
358 #endif
359
360 void scsi_luns_setup(char *str, int *ints) {
361 if (ints[0] != 1)
362 printk("scsi_luns_setup : usage max_scsi_luns=n (n should be between 1 and 8)\n");
363 else
364 max_scsi_luns = ints[1];
365 }
366
367
368
369
370
371
372
373
374 static
375 void scan_scsis (struct Scsi_Host * shpnt, unchar hardcoded,
376 unchar hchannel, unchar hid, unchar hlun)
377 {
378 int dev, lun, type, channel;
379 unsigned char scsi_cmd [12];
380 unsigned char scsi_result0 [256];
381 unsigned char * scsi_result;
382 Scsi_Device * SDpnt, *SDtail;
383 struct Scsi_Device_Template * sdtpnt;
384 int bflags;
385 int max_dev_lun = 0;
386 Scsi_Cmnd *SCpnt;
387
388 ++in_scan_scsis;
389 lun = 0;
390 type = -1;
391 SCpnt = (Scsi_Cmnd *) scsi_init_malloc(sizeof(Scsi_Cmnd), GFP_ATOMIC|GFP_DMA);
392 SDpnt = (Scsi_Device *) scsi_init_malloc(sizeof (Scsi_Device), GFP_ATOMIC);
393 SDtail = scsi_devices;
394
395 if(scsi_devices) while(SDtail->next) SDtail = SDtail->next;
396
397
398 scsi_result = ((!dma_malloc_freelist || !shpnt->unchecked_isa_dma)
399 ? &scsi_result0[0] : scsi_malloc(512));
400
401 if(scsi_result == NULL) {
402 printk("Unable to obtain scsi_result buffer\n");
403 goto leave;
404 }
405
406 shpnt->host_queue = SCpnt;
407
408 if(hardcoded == 1) {
409 channel = hchannel;
410 dev = hid;
411 lun = hlun;
412 goto crude;
413 }
414
415 for (channel = 0; channel <= shpnt->max_channel; channel++)
416 {
417 for (dev = 0; dev < shpnt->max_id; ++dev) {
418 if (shpnt->this_id != dev) {
419
420
421
422
423
424
425
426 max_dev_lun = (max_scsi_luns < shpnt->max_lun ?
427 max_scsi_luns : shpnt->max_lun);
428
429 for (lun = 0; lun < max_dev_lun; ++lun)
430 {
431 crude:
432 memset(SDpnt, 0, sizeof(Scsi_Device));
433 SDpnt->host = shpnt;
434 SDpnt->id = dev;
435 SDpnt->lun = lun;
436 SDpnt->channel = channel;
437
438
439 SDpnt->type = -1;
440
441
442
443
444 SDpnt->borken = 1;
445 SDpnt->was_reset = 0;
446 SDpnt->expecting_cc_ua = 0;
447
448 scsi_cmd[0] = TEST_UNIT_READY;
449 scsi_cmd[1] = lun << 5;
450 scsi_cmd[2] = scsi_cmd[3] = scsi_cmd[4] = scsi_cmd[5] = 0;
451
452 memset(SCpnt, 0, sizeof(Scsi_Cmnd));
453 SCpnt->host = SDpnt->host;
454 SCpnt->device = SDpnt;
455 SCpnt->target = SDpnt->id;
456 SCpnt->lun = SDpnt->lun;
457 SCpnt->channel = SDpnt->channel;
458
459 {
460
461
462
463 struct semaphore sem = MUTEX_LOCKED;
464 SCpnt->request.sem = &sem;
465 SCpnt->request.rq_status = RQ_SCSI_BUSY;
466 scsi_do_cmd (SCpnt, (void *) scsi_cmd,
467 (void *) scsi_result,
468 256, scan_scsis_done, SCSI_TIMEOUT + 4 * HZ, 5);
469 down(&sem);
470 }
471
472 #if defined(DEBUG) || defined(DEBUG_INIT)
473 printk("scsi: scan SCSIS id %d lun %d\n", dev, lun);
474 printk("scsi: return code %08x\n", SCpnt->result);
475 #endif
476
477 if(SCpnt->result) {
478 if (((driver_byte(SCpnt->result) & DRIVER_SENSE) ||
479 (status_byte(SCpnt->result) & CHECK_CONDITION)) &&
480 ((SCpnt->sense_buffer[0] & 0x70) >> 4) == 7) {
481 if (SCpnt->sense_buffer[2] &0xe0)
482 continue;
483 if(((SCpnt->sense_buffer[2] & 0xf) != NOT_READY) &&
484 ((SCpnt->sense_buffer[2] & 0xf) != UNIT_ATTENTION))
485 continue;
486 }
487 else
488 break;
489 }
490
491 #if defined (DEBUG) || defined(DEBUG_INIT)
492 printk("scsi: performing INQUIRY\n");
493 #endif
494
495
496
497
498 scsi_cmd[0] = INQUIRY;
499 scsi_cmd[1] = (lun << 5) & 0xe0;
500 scsi_cmd[2] = 0;
501 scsi_cmd[3] = 0;
502 scsi_cmd[4] = 255;
503 scsi_cmd[5] = 0;
504
505 SCpnt->cmd_len = 0;
506
507 {
508 struct semaphore sem = MUTEX_LOCKED;
509 SCpnt->request.sem = &sem;
510 SCpnt->request.rq_status = RQ_SCSI_BUSY;
511 scsi_do_cmd (SCpnt, (void *) scsi_cmd,
512 (void *) scsi_result,
513 256, scan_scsis_done, SCSI_TIMEOUT, 3);
514 down(&sem);
515 }
516
517 the_result = SCpnt->result;
518
519 #if defined(DEBUG) || defined(DEBUG_INIT)
520 if (!the_result)
521 printk("scsi: INQUIRY successful\n");
522 else
523 printk("scsi: INQUIRY failed with code %08x\n", the_result);
524 #endif
525
526 if(the_result) break;
527
528
529
530 if (!the_result)
531 {
532
533
534
535 if (!strncmp(scsi_result+8,"TOSHIBA",7) &&
536 !strncmp(scsi_result+16,"CD-ROM",6) &&
537 scsi_result[0] == TYPE_DISK) {
538 scsi_result[0] = TYPE_ROM;
539 scsi_result[1] |= 0x80;
540 }
541
542 if (!strncmp(scsi_result+8,"NEC",3)) {
543 if (!strncmp(scsi_result+16,"CD-ROM DRIVE:84 ",16) ||
544 !strncmp(scsi_result+16,"CD-ROM DRIVE:25",15))
545 SDpnt->manufacturer = SCSI_MAN_NEC_OLDCDR;
546 else
547 SDpnt->manufacturer = SCSI_MAN_NEC;
548 } else if (!strncmp(scsi_result+8,"TOSHIBA",7))
549 SDpnt->manufacturer = SCSI_MAN_TOSHIBA;
550 else if (!strncmp(scsi_result+8,"SONY",4))
551 SDpnt->manufacturer = SCSI_MAN_SONY;
552 else if (!strncmp(scsi_result+8, "PIONEER", 7))
553 SDpnt->manufacturer = SCSI_MAN_PIONEER;
554 else
555 SDpnt->manufacturer = SCSI_MAN_UNKNOWN;
556
557 memcpy(SDpnt->vendor, scsi_result+8, 8);
558 memcpy(SDpnt->model, scsi_result+16, 16);
559 memcpy(SDpnt->rev, scsi_result+32, 4);
560
561 SDpnt->removable = (0x80 & scsi_result[1]) >> 7;
562 SDpnt->lockable = SDpnt->removable;
563 SDpnt->changed = 0;
564 SDpnt->access_count = 0;
565 SDpnt->busy = 0;
566 SDpnt->has_cmdblocks = 0;
567
568
569
570
571
572
573 switch (type = (scsi_result[0] & 0x1f))
574 {
575 case TYPE_TAPE :
576 case TYPE_DISK :
577 case TYPE_MOD :
578 case TYPE_PROCESSOR :
579 case TYPE_SCANNER :
580 SDpnt->writeable = 1;
581 break;
582 case TYPE_WORM :
583 case TYPE_ROM :
584 SDpnt->writeable = 0;
585 break;
586 default :
587 #if 0
588 #ifdef DEBUG
589 printk("scsi: unknown type %d\n", type);
590 print_inquiry(scsi_result);
591 #endif
592 type = -1;
593 #endif
594 }
595
596 SDpnt->single_lun = 0;
597 SDpnt->soft_reset =
598 (scsi_result[7] & 1) && ((scsi_result[3] &7) == 2);
599 SDpnt->random = (type == TYPE_TAPE) ? 0 : 1;
600 SDpnt->type = (type & 0x1f);
601
602 if (type != -1)
603 {
604 print_inquiry(scsi_result);
605
606 for(sdtpnt = scsi_devicelist; sdtpnt;
607 sdtpnt = sdtpnt->next)
608 if(sdtpnt->detect) SDpnt->attached +=
609 (*sdtpnt->detect)(SDpnt);
610
611 SDpnt->scsi_level = scsi_result[2] & 0x07;
612 if (SDpnt->scsi_level >= 2 ||
613 (SDpnt->scsi_level == 1 &&
614 (scsi_result[3] & 0x0f) == 1))
615 SDpnt->scsi_level++;
616
617
618
619
620
621
622 SDpnt->tagged_queue = 0;
623
624 if ((SDpnt->scsi_level >= SCSI_2) &&
625 (scsi_result[7] & 2)) {
626 SDpnt->tagged_supported = 1;
627 SDpnt->current_tag = 0;
628 }
629
630
631
632
633
634
635 SDpnt->disconnect = 0;
636
637
638
639
640 bflags = get_device_flags(scsi_result);
641
642
643
644
645
646
647
648
649
650
651 if( (bflags & BLIST_BORKEN) == 0 )
652 {
653 SDpnt->borken = 0;
654 }
655
656
657
658
659
660 if( (bflags & BLIST_KEY) != 0 ) {
661 printk("Unlocked floptical drive.\n");
662 SDpnt->lockable = 0;
663 scsi_cmd[0] = MODE_SENSE;
664 scsi_cmd[1] = (lun << 5) & 0xe0;
665 scsi_cmd[2] = 0x2e;
666 scsi_cmd[3] = 0;
667 scsi_cmd[4] = 0x2a;
668 scsi_cmd[5] = 0;
669
670 SCpnt->cmd_len = 0;
671 {
672 struct semaphore sem = MUTEX_LOCKED;
673 SCpnt->request.rq_status = RQ_SCSI_BUSY;
674 SCpnt->request.sem = &sem;
675 scsi_do_cmd (SCpnt, (void *) scsi_cmd,
676 (void *) scsi_result, 0x2a,
677 scan_scsis_done, SCSI_TIMEOUT, 3);
678 down(&sem);
679 }
680 }
681
682 if(SDtail)
683 SDtail->next = SDpnt;
684 else
685 scsi_devices = SDpnt;
686 SDtail = SDpnt;
687
688 SDpnt = (Scsi_Device *) scsi_init_malloc(sizeof (Scsi_Device), GFP_ATOMIC);
689
690
691
692 if(bflags & BLIST_NOLUN) break;
693
694
695
696
697
698
699 if(bflags & BLIST_SINGLELUN)
700 {
701 SDpnt->single_lun = 1;
702 }
703
704
705
706
707
708
709 if(bflags & BLIST_FORCELUN)
710 {
711
712
713
714
715 max_dev_lun = 8;
716 }
717
718
719
720 if ((scsi_result[2] & 0x07) == 0)
721 break;
722
723
724
725 if((scsi_result[2] & 0x07) == 1 &&
726 (scsi_result[3] & 0x0f) == 0) break;
727 }
728 }
729
730
731
732
733
734 if(hardcoded == 1)
735 goto leave;
736 }
737 }
738 }
739 }
740
741 leave:
742 shpnt->host_queue = NULL;
743
744
745 if(SDpnt != NULL)
746 scsi_init_free((char *) SDpnt, sizeof(Scsi_Device));
747
748 if(SCpnt != NULL)
749 scsi_init_free((char *) SCpnt, sizeof(Scsi_Cmnd));
750
751
752 if (scsi_result != &scsi_result0[0] && scsi_result != NULL)
753 scsi_free(scsi_result, 512);
754
755 in_scan_scsis = 0;
756 }
757
758
759
760
761
762 #define NORMAL_TIMEOUT 0
763 #define IN_ABORT 1
764 #define IN_RESET 2
765
766
767
768
769
770
771
772 static void scsi_times_out (Scsi_Cmnd * SCpnt, int pid)
773 {
774
775 switch (SCpnt->internal_timeout & (IN_ABORT | IN_RESET))
776 {
777 case NORMAL_TIMEOUT:
778 if (!in_scan_scsis) {
779 #ifdef DEBUG_TIMEOUT
780 scsi_dump_status();
781 #endif
782 }
783
784 if (!scsi_abort (SCpnt, DID_TIME_OUT, pid))
785 return;
786 case IN_ABORT:
787 printk("SCSI host %d abort() timed out - resetting\n",
788 SCpnt->host->host_no);
789 if (!scsi_reset (SCpnt, FALSE))
790 return;
791 case IN_RESET:
792 case (IN_ABORT | IN_RESET):
793
794
795
796
797 printk("Unable to reset scsi host %d - ", SCpnt->host->host_no);
798 printk("probably a SCSI bus hang.\n");
799 scsi_reset (SCpnt, TRUE);
800 return;
801
802 default:
803 INTERNAL_ERROR;
804 }
805
806 }
807
808
809
810
811
812
813
814
815
816 Scsi_Cmnd * request_queueable (struct request * req, Scsi_Device * device)
817 {
818 Scsi_Cmnd * SCpnt = NULL;
819 int tablesize;
820 Scsi_Cmnd * found = NULL;
821 struct buffer_head * bh, *bhp;
822
823 if (!device)
824 panic ("No device passed to request_queueable().\n");
825
826 if (req && req->rq_status == RQ_INACTIVE)
827 panic("Inactive in request_queueable");
828
829 SCpnt = device->host->host_queue;
830
831
832
833
834
835
836
837 SCpnt = device->host->host_queue;
838 if (!device->single_lun) {
839 while(SCpnt){
840 if(SCpnt->target == device->id &&
841 SCpnt->lun == device->lun) {
842 if(SCpnt->request.rq_status == RQ_INACTIVE) break;
843 }
844 SCpnt = SCpnt->next;
845 }
846 } else {
847 while(SCpnt){
848 if(SCpnt->target == device->id) {
849 if (SCpnt->lun == device->lun) {
850 if(found == NULL
851 && SCpnt->request.rq_status == RQ_INACTIVE)
852 {
853 found=SCpnt;
854 }
855 }
856 if(SCpnt->request.rq_status != RQ_INACTIVE) {
857
858
859
860
861
862 return NULL;
863 }
864 }
865 SCpnt = SCpnt->next;
866 }
867 SCpnt = found;
868 }
869
870 if (!SCpnt) return NULL;
871
872 if (SCSI_BLOCK(device->host)) return NULL;
873
874 if (req) {
875 memcpy(&SCpnt->request, req, sizeof(struct request));
876 tablesize = device->host->sg_tablesize;
877 bhp = bh = req->bh;
878 if(!tablesize) bh = NULL;
879
880
881
882
883 while(req->nr_sectors && bh){
884 bhp = bhp->b_reqnext;
885 if(!bhp || !CONTIGUOUS_BUFFERS(bh,bhp)) tablesize--;
886 req->nr_sectors -= bh->b_size >> 9;
887 req->sector += bh->b_size >> 9;
888 if(!tablesize) break;
889 bh = bhp;
890 }
891 if(req->nr_sectors && bh && bh->b_reqnext){
892 SCpnt->request.bhtail = bh;
893 req->bh = bh->b_reqnext;
894 bh->b_reqnext = NULL;
895 bh = req->bh;
896
897
898 SCpnt->request.nr_sectors -= req->nr_sectors;
899 req->current_nr_sectors = bh->b_size >> 9;
900 req->buffer = bh->b_data;
901 SCpnt->request.sem = NULL;
902 } else {
903 req->rq_status = RQ_INACTIVE;
904 wake_up(&wait_for_request);
905 }
906 } else {
907 SCpnt->request.rq_status = RQ_SCSI_BUSY;
908 SCpnt->request.sem = NULL;
909
910 }
911
912 SCpnt->use_sg = 0;
913 SCpnt->old_use_sg = 0;
914 SCpnt->transfersize = 0;
915 SCpnt->underflow = 0;
916 SCpnt->cmd_len = 0;
917
918
919
920
921 SCpnt->channel = device->channel;
922 SCpnt->lun = device->lun;
923 SCpnt->target = device->id;
924
925 return SCpnt;
926 }
927
928
929
930
931
932
933
934
935
936
937
938 Scsi_Cmnd * allocate_device (struct request ** reqp, Scsi_Device * device,
939 int wait)
940 {
941 kdev_t dev;
942 struct request * req = NULL;
943 int tablesize;
944 unsigned int flags;
945 struct buffer_head * bh, *bhp;
946 struct Scsi_Host * host;
947 Scsi_Cmnd * SCpnt = NULL;
948 Scsi_Cmnd * SCwait = NULL;
949 Scsi_Cmnd * found = NULL;
950
951 if (!device)
952 panic ("No device passed to allocate_device().\n");
953
954 if (reqp) req = *reqp;
955
956
957 if (req) {
958 if(req->rq_status == RQ_INACTIVE) return NULL;
959 dev = req->rq_dev;
960 } else
961 dev = 0;
962
963 host = device->host;
964
965 if (intr_count && SCSI_BLOCK(host)) return NULL;
966
967 while (1==1){
968 SCpnt = device->host->host_queue;
969 if (!device->single_lun) {
970 while(SCpnt){
971 if(SCpnt->target == device->id &&
972 SCpnt->lun == device->lun) {
973 SCwait = SCpnt;
974 if(SCpnt->request.rq_status == RQ_INACTIVE) break;
975 }
976 SCpnt = SCpnt->next;
977 }
978 } else {
979 while(SCpnt){
980 if(SCpnt->target == device->id) {
981 if (SCpnt->lun == device->lun) {
982 SCwait = SCpnt;
983 if(found == NULL
984 && SCpnt->request.rq_status == RQ_INACTIVE)
985 {
986 found=SCpnt;
987 }
988 }
989 if(SCpnt->request.rq_status != RQ_INACTIVE) {
990
991
992
993
994
995 found = NULL;
996 break;
997 }
998 }
999 SCpnt = SCpnt->next;
1000 }
1001 SCpnt = found;
1002 }
1003
1004 save_flags(flags);
1005 cli();
1006
1007
1008 if (req && (req->rq_status == RQ_INACTIVE || req->rq_dev != dev)) {
1009 restore_flags(flags);
1010 return NULL;
1011 }
1012 if (!SCpnt || SCpnt->request.rq_status != RQ_INACTIVE)
1013 {
1014 restore_flags(flags);
1015 if(!wait) return NULL;
1016 if (!SCwait) {
1017 printk("Attempt to allocate device channel %d, target %d, "
1018 "lun %d\n", device->channel, device->id, device->lun);
1019 panic("No device found in allocate_device\n");
1020 }
1021 SCSI_SLEEP(&device->device_wait,
1022 (SCwait->request.rq_status != RQ_INACTIVE));
1023 } else {
1024 if (req) {
1025 memcpy(&SCpnt->request, req, sizeof(struct request));
1026 tablesize = device->host->sg_tablesize;
1027 bhp = bh = req->bh;
1028 if(!tablesize) bh = NULL;
1029
1030
1031
1032
1033 while(req->nr_sectors && bh){
1034 bhp = bhp->b_reqnext;
1035 if(!bhp || !CONTIGUOUS_BUFFERS(bh,bhp)) tablesize--;
1036 req->nr_sectors -= bh->b_size >> 9;
1037 req->sector += bh->b_size >> 9;
1038 if(!tablesize) break;
1039 bh = bhp;
1040 }
1041 if(req->nr_sectors && bh && bh->b_reqnext){
1042 SCpnt->request.bhtail = bh;
1043 req->bh = bh->b_reqnext;
1044 bh->b_reqnext = NULL;
1045 bh = req->bh;
1046
1047 SCpnt->request.nr_sectors -= req->nr_sectors;
1048 req->current_nr_sectors = bh->b_size >> 9;
1049 req->buffer = bh->b_data;
1050 SCpnt->request.sem = NULL;
1051 }
1052 else
1053 {
1054 req->rq_status = RQ_INACTIVE;
1055 *reqp = req->next;
1056 wake_up(&wait_for_request);
1057 }
1058 } else {
1059 SCpnt->request.rq_status = RQ_SCSI_BUSY;
1060 SCpnt->request.sem = NULL;
1061
1062 }
1063 restore_flags(flags);
1064 break;
1065 }
1066 }
1067
1068 SCpnt->use_sg = 0;
1069 SCpnt->old_use_sg = 0;
1070 SCpnt->transfersize = 0;
1071 SCpnt->cmd_len = 0;
1072
1073 SCpnt->underflow = 0;
1074
1075
1076
1077
1078 SCpnt->channel = device->channel;
1079 SCpnt->lun = device->lun;
1080 SCpnt->target = device->id;
1081
1082 return SCpnt;
1083 }
1084
1085
1086
1087
1088
1089 inline void internal_cmnd (Scsi_Cmnd * SCpnt)
1090 {
1091 int temp;
1092 struct Scsi_Host * host;
1093 unsigned int flags;
1094 #ifdef DEBUG_DELAY
1095 int clock;
1096 #endif
1097
1098 host = SCpnt->host;
1099
1100
1101
1102
1103
1104 save_flags(flags);
1105 sti();
1106 temp = host->last_reset + MIN_RESET_DELAY;
1107 while (jiffies < temp);
1108 restore_flags(flags);
1109
1110 update_timeout(SCpnt, SCpnt->timeout_per_command);
1111
1112
1113
1114
1115
1116 #ifdef DEBUG
1117 printk("internal_cmnd (host = %d, channel = %d, target = %d, "
1118 "command = %p, buffer = %p, \nbufflen = %d, done = %p)\n",
1119 SCpnt->host->host_no, SCpnt->channel, SCpnt->target, SCpnt->cmnd,
1120 SCpnt->buffer, SCpnt->bufflen, SCpnt->done);
1121 #endif
1122
1123 if (host->can_queue)
1124 {
1125 #ifdef DEBUG
1126 printk("queuecommand : routine at %p\n",
1127 host->hostt->queuecommand);
1128 #endif
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138 if(!intr_count && SCpnt->host->irq)
1139 disable_irq(SCpnt->host->irq);
1140
1141 host->hostt->queuecommand (SCpnt, scsi_done);
1142
1143 if(!intr_count && SCpnt->host->irq)
1144 enable_irq(SCpnt->host->irq);
1145 }
1146 else
1147 {
1148
1149 #ifdef DEBUG
1150 printk("command() : routine at %p\n", host->hostt->command);
1151 #endif
1152 temp=host->hostt->command (SCpnt);
1153 SCpnt->result = temp;
1154 #ifdef DEBUG_DELAY
1155 clock = jiffies + 4 * HZ;
1156 while (jiffies < clock);
1157 printk("done(host = %d, result = %04x) : routine at %08x\n",
1158 host->host_no, temp);
1159 #endif
1160 scsi_done(SCpnt);
1161 }
1162 #ifdef DEBUG
1163 printk("leaving internal_cmnd()\n");
1164 #endif
1165 }
1166
1167 static void scsi_request_sense (Scsi_Cmnd * SCpnt)
1168 {
1169 unsigned int flags;
1170
1171 save_flags(flags);
1172 cli();
1173 SCpnt->flags |= WAS_SENSE | ASKED_FOR_SENSE;
1174 update_timeout(SCpnt, SENSE_TIMEOUT);
1175 restore_flags(flags);
1176
1177
1178 memcpy ((void *) SCpnt->cmnd , (void *) generic_sense,
1179 sizeof(generic_sense));
1180
1181 SCpnt->cmnd[1] = SCpnt->lun << 5;
1182 SCpnt->cmnd[4] = sizeof(SCpnt->sense_buffer);
1183
1184 SCpnt->request_buffer = &SCpnt->sense_buffer;
1185 SCpnt->request_bufflen = sizeof(SCpnt->sense_buffer);
1186 SCpnt->use_sg = 0;
1187 SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
1188 internal_cmnd (SCpnt);
1189 }
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200 void scsi_do_cmd (Scsi_Cmnd * SCpnt, const void *cmnd ,
1201 void *buffer, unsigned bufflen, void (*done)(Scsi_Cmnd *),
1202 int timeout, int retries)
1203 {
1204 unsigned long flags;
1205 struct Scsi_Host * host = SCpnt->host;
1206
1207 #ifdef DEBUG
1208 {
1209 int i;
1210 int target = SCpnt->target;
1211 printk ("scsi_do_cmd (host = %d, channel = %d target = %d, "
1212 "buffer =%p, bufflen = %d, done = %p, timeout = %d, "
1213 "retries = %d)\n"
1214 "command : " , host->host_no, SCpnt->channel, target, buffer,
1215 bufflen, done, timeout, retries);
1216 for (i = 0; i < 10; ++i)
1217 printk ("%02x ", ((unsigned char *) cmnd)[i]);
1218 printk("\n");
1219 }
1220 #endif
1221
1222 if (!host)
1223 {
1224 panic ("Invalid or not present host.\n");
1225 }
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236 save_flags(flags);
1237 cli();
1238 SCpnt->pid = scsi_pid++;
1239
1240 while (SCSI_BLOCK(host)) {
1241 restore_flags(flags);
1242 SCSI_SLEEP(&host->host_wait, SCSI_BLOCK(host));
1243 cli();
1244 }
1245
1246 if (host->block) host_active = host;
1247
1248 host->host_busy++;
1249 restore_flags(flags);
1250
1251
1252
1253
1254
1255
1256
1257
1258 memcpy ((void *) SCpnt->data_cmnd , (const void *) cmnd, 12);
1259 #if 0
1260 SCpnt->host = host;
1261 SCpnt->channel = channel;
1262 SCpnt->target = target;
1263 SCpnt->lun = (SCpnt->data_cmnd[1] >> 5);
1264 #endif
1265 SCpnt->bufflen = bufflen;
1266 SCpnt->buffer = buffer;
1267 SCpnt->flags=0;
1268 SCpnt->retries=0;
1269 SCpnt->allowed=retries;
1270 SCpnt->done = done;
1271 SCpnt->timeout_per_command = timeout;
1272
1273 memcpy ((void *) SCpnt->cmnd , (const void *) cmnd, 12);
1274
1275
1276
1277 memset ((void *) SCpnt->sense_buffer, 0, sizeof SCpnt->sense_buffer);
1278 SCpnt->request_buffer = buffer;
1279 SCpnt->request_bufflen = bufflen;
1280 SCpnt->old_use_sg = SCpnt->use_sg;
1281 if (SCpnt->cmd_len == 0)
1282 SCpnt->cmd_len = COMMAND_SIZE(SCpnt->cmnd[0]);
1283 SCpnt->old_cmd_len = SCpnt->cmd_len;
1284
1285
1286
1287 SCpnt->internal_timeout = 0;
1288 SCpnt->abort_reason = 0;
1289 internal_cmnd (SCpnt);
1290
1291 #ifdef DEBUG
1292 printk ("Leaving scsi_do_cmd()\n");
1293 #endif
1294 }
1295
1296 static int check_sense (Scsi_Cmnd * SCpnt)
1297 {
1298
1299
1300
1301
1302 if (((SCpnt->sense_buffer[0] & 0x70) >> 4) != 7) {
1303 if(!(SCpnt->flags & ASKED_FOR_SENSE))
1304 return SUGGEST_SENSE;
1305 else
1306 return SUGGEST_RETRY;
1307 }
1308
1309 SCpnt->flags &= ~ASKED_FOR_SENSE;
1310
1311 #ifdef DEBUG_INIT
1312 printk("scsi%d, channel%d : ", SCpnt->host->host_no, SCpnt->channel);
1313 print_sense("", SCpnt);
1314 printk("\n");
1315 #endif
1316 if (SCpnt->sense_buffer[2] & 0xe0)
1317 return SUGGEST_ABORT;
1318
1319 switch (SCpnt->sense_buffer[2] & 0xf)
1320 {
1321 case NO_SENSE:
1322 return 0;
1323 case RECOVERED_ERROR:
1324 return SUGGEST_IS_OK;
1325
1326 case ABORTED_COMMAND:
1327 return SUGGEST_RETRY;
1328 case NOT_READY:
1329 case UNIT_ATTENTION:
1330
1331
1332
1333
1334
1335
1336 if( SCpnt->device->expecting_cc_ua )
1337 {
1338 SCpnt->device->expecting_cc_ua = 0;
1339 return SUGGEST_RETRY;
1340 }
1341 return SUGGEST_ABORT;
1342
1343
1344 case COPY_ABORTED:
1345 case VOLUME_OVERFLOW:
1346 case MISCOMPARE:
1347
1348 case MEDIUM_ERROR:
1349 return SUGGEST_REMAP;
1350 case BLANK_CHECK:
1351 case DATA_PROTECT:
1352 case HARDWARE_ERROR:
1353 case ILLEGAL_REQUEST:
1354 default:
1355 return SUGGEST_ABORT;
1356 }
1357 }
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380 static void scsi_done (Scsi_Cmnd * SCpnt)
1381 {
1382 int status=0;
1383 int exit=0;
1384 int checked;
1385 int oldto;
1386 struct Scsi_Host * host = SCpnt->host;
1387 int result = SCpnt->result;
1388 oldto = update_timeout(SCpnt, 0);
1389
1390 #ifdef DEBUG_TIMEOUT
1391 if(result) printk("Non-zero result in scsi_done %x %d:%d\n",
1392 result, SCpnt->target, SCpnt->lun);
1393 #endif
1394
1395
1396
1397
1398 if(host_byte(result) == DID_ABORT && SCpnt->abort_reason)
1399 SCpnt->result = result = (result & 0xff00ffff) |
1400 (SCpnt->abort_reason << 16);
1401
1402
1403 #define FINISHED 0
1404 #define MAYREDO 1
1405 #define REDO 3
1406 #define PENDING 4
1407
1408 #ifdef DEBUG
1409 printk("In scsi_done(host = %d, result = %06x)\n", host->host_no, result);
1410 #endif
1411
1412 if(SCpnt->flags & WAS_SENSE)
1413 {
1414 SCpnt->use_sg = SCpnt->old_use_sg;
1415 SCpnt->cmd_len = SCpnt->old_cmd_len;
1416 }
1417
1418 switch (host_byte(result))
1419 {
1420 case DID_OK:
1421 if (status_byte(result) && (SCpnt->flags & WAS_SENSE))
1422
1423 {
1424 SCpnt->flags &= ~WAS_SENSE;
1425 SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
1426
1427 if (!(SCpnt->flags & WAS_RESET))
1428 {
1429 printk("scsi%d : channel %d target %d lun %d request sense"
1430 " failed, performing reset.\n",
1431 SCpnt->host->host_no, SCpnt->channel, SCpnt->target,
1432 SCpnt->lun);
1433 scsi_reset(SCpnt, FALSE);
1434 return;
1435 }
1436 else
1437 {
1438 exit = (DRIVER_HARD | SUGGEST_ABORT);
1439 status = FINISHED;
1440 }
1441 }
1442 else switch(msg_byte(result))
1443 {
1444 case COMMAND_COMPLETE:
1445 switch (status_byte(result))
1446 {
1447 case GOOD:
1448 if (SCpnt->flags & WAS_SENSE)
1449 {
1450 #ifdef DEBUG
1451 printk ("In scsi_done, GOOD status, COMMAND COMPLETE, parsing sense information.\n");
1452 #endif
1453 SCpnt->flags &= ~WAS_SENSE;
1454 SCpnt->internal_timeout &= ~SENSE_TIMEOUT;
1455
1456 switch (checked = check_sense(SCpnt))
1457 {
1458 case SUGGEST_SENSE:
1459 case 0:
1460 #ifdef DEBUG
1461 printk("NO SENSE. status = REDO\n");
1462 #endif
1463 update_timeout(SCpnt, oldto);
1464 status = REDO;
1465 break;
1466 case SUGGEST_IS_OK:
1467 break;
1468 case SUGGEST_REMAP:
1469 case SUGGEST_RETRY:
1470 #ifdef DEBUG
1471 printk("SENSE SUGGEST REMAP or SUGGEST RETRY - status = MAYREDO\n");
1472 #endif
1473 status = MAYREDO;
1474 exit = DRIVER_SENSE | SUGGEST_RETRY;
1475 break;
1476 case SUGGEST_ABORT:
1477 #ifdef DEBUG
1478 printk("SENSE SUGGEST ABORT - status = FINISHED");
1479 #endif
1480 status = FINISHED;
1481 exit = DRIVER_SENSE | SUGGEST_ABORT;
1482 break;
1483 default:
1484 printk ("Internal error %s %d \n", __FILE__,
1485 __LINE__);
1486 }
1487 }
1488 else
1489 {
1490 #ifdef DEBUG
1491 printk("COMMAND COMPLETE message returned, status = FINISHED. \n");
1492 #endif
1493 exit = DRIVER_OK;
1494 status = FINISHED;
1495 }
1496 break;
1497
1498 case CHECK_CONDITION:
1499 switch (check_sense(SCpnt))
1500 {
1501 case 0:
1502 update_timeout(SCpnt, oldto);
1503 status = REDO;
1504 break;
1505 case SUGGEST_REMAP:
1506 case SUGGEST_RETRY:
1507 status = MAYREDO;
1508 exit = DRIVER_SENSE | SUGGEST_RETRY;
1509 break;
1510 case SUGGEST_ABORT:
1511 status = FINISHED;
1512 exit = DRIVER_SENSE | SUGGEST_ABORT;
1513 break;
1514 case SUGGEST_SENSE:
1515 scsi_request_sense (SCpnt);
1516 status = PENDING;
1517 break;
1518 }
1519 break;
1520
1521 case CONDITION_GOOD:
1522 case INTERMEDIATE_GOOD:
1523 case INTERMEDIATE_C_GOOD:
1524 break;
1525
1526 case BUSY:
1527 update_timeout(SCpnt, oldto);
1528 status = REDO;
1529 break;
1530
1531 case RESERVATION_CONFLICT:
1532 printk("scsi%d, channel %d : RESERVATION CONFLICT performing"
1533 " reset.\n", SCpnt->host->host_no, SCpnt->channel);
1534 scsi_reset(SCpnt, FALSE);
1535 return;
1536 #if 0
1537 exit = DRIVER_SOFT | SUGGEST_ABORT;
1538 status = MAYREDO;
1539 break;
1540 #endif
1541 default:
1542 printk ("Internal error %s %d \n"
1543 "status byte = %d \n", __FILE__,
1544 __LINE__, status_byte(result));
1545
1546 }
1547 break;
1548 default:
1549 panic("scsi: unsupported message byte %d received\n",
1550 msg_byte(result));
1551 }
1552 break;
1553 case DID_TIME_OUT:
1554 #ifdef DEBUG
1555 printk("Host returned DID_TIME_OUT - ");
1556 #endif
1557
1558 if (SCpnt->flags & WAS_TIMEDOUT)
1559 {
1560 #ifdef DEBUG
1561 printk("Aborting\n");
1562 #endif
1563 exit = (DRIVER_TIMEOUT | SUGGEST_ABORT);
1564 }
1565 else
1566 {
1567 #ifdef DEBUG
1568 printk ("Retrying.\n");
1569 #endif
1570 SCpnt->flags |= WAS_TIMEDOUT;
1571 SCpnt->internal_timeout &= ~IN_ABORT;
1572 status = REDO;
1573 }
1574 break;
1575 case DID_BUS_BUSY:
1576 case DID_PARITY:
1577 status = REDO;
1578 break;
1579 case DID_NO_CONNECT:
1580 #ifdef DEBUG
1581 printk("Couldn't connect.\n");
1582 #endif
1583 exit = (DRIVER_HARD | SUGGEST_ABORT);
1584 break;
1585 case DID_ERROR:
1586 status = MAYREDO;
1587 exit = (DRIVER_HARD | SUGGEST_ABORT);
1588 break;
1589 case DID_BAD_TARGET:
1590 case DID_ABORT:
1591 exit = (DRIVER_INVALID | SUGGEST_ABORT);
1592 break;
1593 case DID_RESET:
1594 if (SCpnt->flags & IS_RESETTING)
1595 {
1596 SCpnt->flags &= ~IS_RESETTING;
1597 status = REDO;
1598 break;
1599 }
1600
1601 if(msg_byte(result) == GOOD &&
1602 status_byte(result) == CHECK_CONDITION) {
1603 switch (check_sense(SCpnt)) {
1604 case 0:
1605 update_timeout(SCpnt, oldto);
1606 status = REDO;
1607 break;
1608 case SUGGEST_REMAP:
1609 case SUGGEST_RETRY:
1610 status = MAYREDO;
1611 exit = DRIVER_SENSE | SUGGEST_RETRY;
1612 break;
1613 case SUGGEST_ABORT:
1614 status = FINISHED;
1615 exit = DRIVER_SENSE | SUGGEST_ABORT;
1616 break;
1617 case SUGGEST_SENSE:
1618 scsi_request_sense (SCpnt);
1619 status = PENDING;
1620 break;
1621 }
1622 } else {
1623 status=REDO;
1624 exit = SUGGEST_RETRY;
1625 }
1626 break;
1627 default :
1628 exit = (DRIVER_ERROR | SUGGEST_DIE);
1629 }
1630
1631 switch (status)
1632 {
1633 case FINISHED:
1634 case PENDING:
1635 break;
1636 case MAYREDO:
1637 #ifdef DEBUG
1638 printk("In MAYREDO, allowing %d retries, have %d\n",
1639 SCpnt->allowed, SCpnt->retries);
1640 #endif
1641 if ((++SCpnt->retries) < SCpnt->allowed)
1642 {
1643 if ((SCpnt->retries >= (SCpnt->allowed >> 1))
1644 && !(jiffies < SCpnt->host->last_reset + MIN_RESET_PERIOD)
1645 && !(SCpnt->flags & WAS_RESET))
1646 {
1647 printk("scsi%d channel %d : resetting for second half of retries.\n",
1648 SCpnt->host->host_no, SCpnt->channel);
1649 scsi_reset(SCpnt, FALSE);
1650 break;
1651 }
1652
1653 }
1654 else
1655 {
1656 status = FINISHED;
1657 break;
1658 }
1659
1660
1661 case REDO:
1662
1663 if (SCpnt->flags & WAS_SENSE)
1664 scsi_request_sense(SCpnt);
1665 else
1666 {
1667 memcpy ((void *) SCpnt->cmnd,
1668 (void*) SCpnt->data_cmnd,
1669 sizeof(SCpnt->data_cmnd));
1670 SCpnt->request_buffer = SCpnt->buffer;
1671 SCpnt->request_bufflen = SCpnt->bufflen;
1672 SCpnt->use_sg = SCpnt->old_use_sg;
1673 SCpnt->cmd_len = SCpnt->old_cmd_len;
1674 internal_cmnd (SCpnt);
1675 }
1676 break;
1677 default:
1678 INTERNAL_ERROR;
1679 }
1680
1681 if (status == FINISHED) {
1682 #ifdef DEBUG
1683 printk("Calling done function - at address %p\n", SCpnt->done);
1684 #endif
1685 host->host_busy--;
1686
1687 if (host->block && host->host_busy == 0) {
1688 host_active = NULL;
1689
1690
1691 if (MAJOR(SCpnt->request.rq_dev) != SCSI_DISK_MAJOR &&
1692 MAJOR(SCpnt->request.rq_dev) != SCSI_CDROM_MAJOR) {
1693 struct Scsi_Host * next;
1694
1695 for (next = host->block; next != host; next = next->block)
1696 wake_up(&next->host_wait);
1697 }
1698
1699 }
1700
1701 wake_up(&host->host_wait);
1702 SCpnt->result = result | ((exit & 0xff) << 24);
1703 SCpnt->use_sg = SCpnt->old_use_sg;
1704 SCpnt->cmd_len = SCpnt->old_cmd_len;
1705 SCpnt->done (SCpnt);
1706 }
1707
1708 #undef FINISHED
1709 #undef REDO
1710 #undef MAYREDO
1711 #undef PENDING
1712 }
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730 int scsi_abort (Scsi_Cmnd * SCpnt, int why, int pid)
1731 {
1732 int oldto;
1733 unsigned long flags;
1734 struct Scsi_Host * host = SCpnt->host;
1735
1736 while(1)
1737 {
1738 save_flags(flags);
1739 cli();
1740
1741
1742
1743
1744
1745 if (SCpnt->request.rq_status == RQ_INACTIVE || pid != SCpnt->pid) {
1746 restore_flags(flags);
1747 return 0;
1748 }
1749
1750 if (SCpnt->internal_timeout & IN_ABORT)
1751 {
1752 restore_flags(flags);
1753 while (SCpnt->internal_timeout & IN_ABORT)
1754 barrier();
1755 }
1756 else
1757 {
1758 SCpnt->internal_timeout |= IN_ABORT;
1759 oldto = update_timeout(SCpnt, ABORT_TIMEOUT);
1760
1761 if ((SCpnt->flags & IS_RESETTING) &&
1762 SCpnt->device->soft_reset) {
1763
1764
1765
1766 printk("Stale command on %d %d:%d appears to have died when"
1767 " the bus was reset\n",
1768 SCpnt->channel, SCpnt->target, SCpnt->lun);
1769 }
1770
1771 restore_flags(flags);
1772 if (!host->host_busy) {
1773 SCpnt->internal_timeout &= ~IN_ABORT;
1774 update_timeout(SCpnt, oldto);
1775 return 0;
1776 }
1777 printk("scsi : aborting command due to timeout : pid %lu, scsi%d,"
1778 " channel %d, id %d, lun %d ",
1779 SCpnt->pid, SCpnt->host->host_no, (int) SCpnt->channel,
1780 (int) SCpnt->target, (int) SCpnt->lun);
1781 print_command (SCpnt->cmnd);
1782 if (SCpnt->request.rq_status == RQ_INACTIVE || pid != SCpnt->pid)
1783 return 0;
1784 SCpnt->abort_reason = why;
1785 switch(host->hostt->abort(SCpnt)) {
1786
1787
1788
1789
1790 case SCSI_ABORT_BUSY:
1791
1792
1793 case SCSI_ABORT_SNOOZE:
1794 if(why == DID_TIME_OUT) {
1795 save_flags(flags);
1796 cli();
1797 SCpnt->internal_timeout &= ~IN_ABORT;
1798 if(SCpnt->flags & WAS_TIMEDOUT) {
1799 restore_flags(flags);
1800 return 1;
1801
1802
1803
1804 } else {
1805 SCpnt->flags |= WAS_TIMEDOUT;
1806 oldto = SCpnt->timeout_per_command;
1807 update_timeout(SCpnt, oldto);
1808 }
1809 restore_flags(flags);
1810 }
1811 return 0;
1812 case SCSI_ABORT_PENDING:
1813 if(why != DID_TIME_OUT) {
1814 save_flags(flags);
1815 cli();
1816 update_timeout(SCpnt, oldto);
1817 restore_flags(flags);
1818 }
1819 return 0;
1820 case SCSI_ABORT_SUCCESS:
1821
1822
1823
1824 case SCSI_ABORT_NOT_RUNNING:
1825 SCpnt->internal_timeout &= ~IN_ABORT;
1826 update_timeout(SCpnt, 0);
1827 return 0;
1828 case SCSI_ABORT_ERROR:
1829 default:
1830 SCpnt->internal_timeout &= ~IN_ABORT;
1831 return 1;
1832 }
1833 }
1834 }
1835 }
1836
1837 int scsi_reset (Scsi_Cmnd * SCpnt, int bus_reset_flag)
1838 {
1839 int temp, oldto;
1840 unsigned long flags;
1841 Scsi_Cmnd * SCpnt1;
1842 struct Scsi_Host * host = SCpnt->host;
1843
1844 #ifdef DEBUG
1845 printk("Danger Will Robinson! - SCSI bus for host %d is being reset.\n",
1846 host->host_no);
1847 #endif
1848
1849
1850
1851
1852
1853
1854
1855
1856 SCpnt->host->suggest_bus_reset = FALSE;
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866 SCpnt1 = host->host_queue;
1867 while(SCpnt1) {
1868 if( SCpnt1->request.rq_status != RQ_INACTIVE
1869 && (SCpnt1->flags & (WAS_RESET | IS_RESETTING)) == 0 )
1870 {
1871 break;
1872 }
1873 SCpnt1 = SCpnt1->next;
1874 }
1875 if( SCpnt1 == NULL ) {
1876 SCpnt->host->suggest_bus_reset = TRUE;
1877 }
1878
1879
1880
1881
1882
1883
1884
1885 if( bus_reset_flag ) {
1886 SCpnt->host->suggest_bus_reset = TRUE;
1887 }
1888
1889 while (1) {
1890 save_flags(flags);
1891 cli();
1892 if (SCpnt->internal_timeout & IN_RESET)
1893 {
1894 restore_flags(flags);
1895 while (SCpnt->internal_timeout & IN_RESET)
1896 barrier();
1897 }
1898 else
1899 {
1900 SCpnt->internal_timeout |= IN_RESET;
1901 oldto = update_timeout(SCpnt, RESET_TIMEOUT);
1902
1903 if (host->host_busy)
1904 {
1905 restore_flags(flags);
1906 SCpnt1 = host->host_queue;
1907 while(SCpnt1) {
1908 if (SCpnt1->request.rq_status != RQ_INACTIVE) {
1909 #if 0
1910 if (!(SCpnt1->flags & IS_RESETTING) &&
1911 !(SCpnt1->internal_timeout & IN_ABORT))
1912 scsi_abort(SCpnt1, DID_RESET, SCpnt->pid);
1913 #endif
1914 SCpnt1->flags |= (WAS_RESET | IS_RESETTING);
1915 }
1916 SCpnt1 = SCpnt1->next;
1917 }
1918
1919 host->last_reset = jiffies;
1920 temp = host->hostt->reset(SCpnt);
1921 host->last_reset = jiffies;
1922 }
1923 else
1924 {
1925 if (!host->block) host->host_busy++;
1926 restore_flags(flags);
1927 host->last_reset = jiffies;
1928 SCpnt->flags |= (WAS_RESET | IS_RESETTING);
1929 temp = host->hostt->reset(SCpnt);
1930 host->last_reset = jiffies;
1931 if (!host->block) host->host_busy--;
1932 }
1933
1934 #ifdef DEBUG
1935 printk("scsi reset function returned %d\n", temp);
1936 #endif
1937
1938 if( temp & SCSI_RESET_BUS_RESET )
1939 {
1940
1941
1942
1943
1944
1945 SCpnt1 = host->host_queue;
1946 while(SCpnt1) {
1947 SCpnt1->device->was_reset = 1;
1948 SCpnt1->device->expecting_cc_ua = 1;
1949 SCpnt1 = SCpnt1->next;
1950 }
1951 }
1952
1953
1954
1955
1956
1957 switch(temp & SCSI_RESET_ACTION) {
1958 case SCSI_RESET_SUCCESS:
1959 save_flags(flags);
1960 cli();
1961 SCpnt->internal_timeout &= ~IN_RESET;
1962 update_timeout(SCpnt, oldto);
1963 restore_flags(flags);
1964 return 0;
1965 case SCSI_RESET_PENDING:
1966 return 0;
1967 case SCSI_RESET_PUNT:
1968 SCpnt->internal_timeout &= ~IN_RESET;
1969 scsi_request_sense (SCpnt);
1970 return 0;
1971 case SCSI_RESET_WAKEUP:
1972 SCpnt->internal_timeout &= ~IN_RESET;
1973 scsi_request_sense (SCpnt);
1974
1975
1976
1977
1978
1979 if( temp & SCSI_RESET_BUS_RESET )
1980 {
1981 SCpnt1 = host->host_queue;
1982 while(SCpnt1) {
1983 if( SCpnt->request.rq_status != RQ_INACTIVE
1984 && SCpnt1 != SCpnt)
1985 scsi_request_sense (SCpnt);
1986 SCpnt1 = SCpnt1->next;
1987 }
1988 }
1989 return 0;
1990 case SCSI_RESET_SNOOZE:
1991
1992
1993
1994
1995
1996 save_flags(flags);
1997 cli();
1998 SCpnt->internal_timeout &= ~IN_RESET;
1999 update_timeout(SCpnt, 0);
2000 restore_flags(flags);
2001
2002 case SCSI_RESET_ERROR:
2003 default:
2004 return 1;
2005 }
2006
2007 return temp;
2008 }
2009 }
2010 }
2011
2012
2013 static void scsi_main_timeout(void)
2014 {
2015
2016
2017
2018
2019 int timed_out, pid;
2020 unsigned long flags;
2021 struct Scsi_Host * host;
2022 Scsi_Cmnd * SCpnt = NULL;
2023
2024 do {
2025 save_flags(flags);
2026 cli();
2027
2028 update_timeout(NULL, 0);
2029
2030
2031
2032
2033
2034 timed_out = 0;
2035 for(host = scsi_hostlist; host; host = host->next) {
2036 for(SCpnt = host->host_queue; SCpnt; SCpnt = SCpnt->next)
2037 if (SCpnt->timeout == -1)
2038 {
2039 SCpnt->timeout = 0;
2040 pid = SCpnt->pid;
2041 restore_flags(flags);
2042 scsi_times_out(SCpnt, pid);
2043 ++timed_out;
2044 save_flags(flags);
2045 cli();
2046 }
2047 }
2048 } while (timed_out);
2049 restore_flags(flags);
2050 }
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060 static int update_timeout(Scsi_Cmnd * SCset, int timeout)
2061 {
2062 unsigned int least, used;
2063 unsigned int oldto;
2064 unsigned long flags;
2065 struct Scsi_Host * host;
2066 Scsi_Cmnd * SCpnt = NULL;
2067
2068 save_flags(flags);
2069 cli();
2070
2071
2072
2073
2074
2075 used = (time_start) ? (jiffies - time_start) : 0;
2076
2077
2078
2079
2080
2081
2082
2083 oldto = 0;
2084
2085 if(SCset){
2086 oldto = SCset->timeout - used;
2087 SCset->timeout = timeout + used;
2088 }
2089
2090 least = 0xffffffff;
2091
2092 for(host = scsi_hostlist; host; host = host->next)
2093 for(SCpnt = host->host_queue; SCpnt; SCpnt = SCpnt->next)
2094 if (SCpnt->timeout > 0) {
2095 SCpnt->timeout -= used;
2096 if(SCpnt->timeout <= 0) SCpnt->timeout = -1;
2097 if(SCpnt->timeout > 0 && SCpnt->timeout < least)
2098 least = SCpnt->timeout;
2099 }
2100
2101
2102
2103
2104
2105
2106 if (least != 0xffffffff)
2107 {
2108 time_start = jiffies;
2109 timer_table[SCSI_TIMER].expires = (time_elapsed = least) + jiffies;
2110 timer_active |= 1 << SCSI_TIMER;
2111 }
2112 else
2113 {
2114 timer_table[SCSI_TIMER].expires = time_start = time_elapsed = 0;
2115 timer_active &= ~(1 << SCSI_TIMER);
2116 }
2117 restore_flags(flags);
2118 return oldto;
2119 }
2120
2121 #define MALLOC_PAGEBITS 12
2122
2123 static int scsi_register_host(Scsi_Host_Template *);
2124 static void scsi_unregister_host(Scsi_Host_Template *);
2125
2126 void *scsi_malloc(unsigned int len)
2127 {
2128 unsigned int nbits, mask;
2129 unsigned long flags;
2130 int i, j;
2131 if((len & 0x1ff) || len > (1<<MALLOC_PAGEBITS))
2132 return NULL;
2133
2134 save_flags(flags);
2135 cli();
2136 nbits = len >> 9;
2137 mask = (1 << nbits) - 1;
2138
2139 for(i=0;i < (dma_sectors >> (MALLOC_PAGEBITS - 9)); i++)
2140 for(j=0; j<=(sizeof(*dma_malloc_freelist) * 8) - nbits; j++){
2141 if ((dma_malloc_freelist[i] & (mask << j)) == 0){
2142 dma_malloc_freelist[i] |= (mask << j);
2143 restore_flags(flags);
2144 dma_free_sectors -= nbits;
2145 #ifdef DEBUG
2146 printk("SMalloc: %d %p\n",len, dma_malloc_pages[i] + (j << 9));
2147 #endif
2148 return (void *) ((unsigned long) dma_malloc_pages[i] + (j << 9));
2149 }
2150 }
2151 restore_flags(flags);
2152 return NULL;
2153 }
2154
2155 int scsi_free(void *obj, unsigned int len)
2156 {
2157 int page, sector, nbits, mask;
2158 long offset;
2159 unsigned long flags;
2160
2161 #ifdef DEBUG
2162 printk("Sfree %p %d\n",obj, len);
2163 #endif
2164
2165 offset = -1;
2166 for (page = 0; page < (dma_sectors >> 3); page++)
2167 if ((unsigned long) obj >= (unsigned long) dma_malloc_pages[page] &&
2168 (unsigned long) obj < (unsigned long) dma_malloc_pages[page]
2169 + (1 << MALLOC_PAGEBITS))
2170 {
2171 offset = ((unsigned long) obj) - ((unsigned long)dma_malloc_pages[page]);
2172 break;
2173 }
2174
2175 if (page == (dma_sectors >> 3)) panic("Bad offset");
2176 sector = offset >> 9;
2177 if(sector >= dma_sectors) panic ("Bad page");
2178
2179 sector = (offset >> 9) & (sizeof(*dma_malloc_freelist) * 8 - 1);
2180 nbits = len >> 9;
2181 mask = (1 << nbits) - 1;
2182
2183 if ((mask << sector) > 0xffff) panic ("Bad memory alignment");
2184
2185 save_flags(flags);
2186 cli();
2187 if((dma_malloc_freelist[page] & (mask << sector)) != (mask<<sector))
2188 panic("Trying to free unused memory");
2189
2190 dma_free_sectors += nbits;
2191 dma_malloc_freelist[page] &= ~(mask << sector);
2192 restore_flags(flags);
2193 return 0;
2194 }
2195
2196
2197 int scsi_loadable_module_flag;
2198
2199 void * scsi_init_malloc(unsigned int size, int priority)
2200 {
2201 void * retval;
2202
2203
2204
2205
2206
2207 if ((size % PAGE_SIZE) == 0) {
2208 int order, a_size;
2209 for (order = 0, a_size = PAGE_SIZE;
2210 a_size < size; order++, a_size <<= 1)
2211 ;
2212 retval = (void *) __get_dma_pages(priority & GFP_LEVEL_MASK,
2213 order);
2214 } else
2215 retval = kmalloc(size, priority);
2216
2217 if (retval)
2218 memset(retval, 0, size);
2219 return retval;
2220 }
2221
2222
2223 void scsi_init_free(char * ptr, unsigned int size)
2224 {
2225
2226
2227
2228
2229
2230 if ((size % PAGE_SIZE) == 0) {
2231 int order, a_size;
2232
2233 for (order = 0, a_size = PAGE_SIZE;
2234 a_size < size; order++, a_size <<= 1)
2235 ;
2236 free_pages((unsigned long)ptr, order);
2237 } else
2238 kfree(ptr);
2239 }
2240
2241 void scsi_build_commandblocks(Scsi_Device * SDpnt)
2242 {
2243 int j;
2244 Scsi_Cmnd * SCpnt;
2245 struct Scsi_Host * host = NULL;
2246
2247 for(j=0;j<SDpnt->host->cmd_per_lun;j++){
2248 SCpnt = (Scsi_Cmnd *) scsi_init_malloc(sizeof(Scsi_Cmnd), GFP_ATOMIC);
2249 SCpnt->host = SDpnt->host;
2250 SCpnt->device = SDpnt;
2251 SCpnt->target = SDpnt->id;
2252 SCpnt->lun = SDpnt->lun;
2253 SCpnt->channel = SDpnt->channel;
2254 SCpnt->request.rq_status = RQ_INACTIVE;
2255 SCpnt->use_sg = 0;
2256 SCpnt->old_use_sg = 0;
2257 SCpnt->old_cmd_len = 0;
2258 SCpnt->timeout = 0;
2259 SCpnt->underflow = 0;
2260 SCpnt->transfersize = 0;
2261 SCpnt->host_scribble = NULL;
2262 host = SDpnt->host;
2263 if(host->host_queue)
2264 host->host_queue->prev = SCpnt;
2265 SCpnt->next = host->host_queue;
2266 SCpnt->prev = NULL;
2267 host->host_queue = SCpnt;
2268 }
2269 SDpnt->has_cmdblocks = 1;
2270 }
2271
2272
2273
2274
2275
2276
2277 int scsi_dev_init(void)
2278 {
2279 Scsi_Device * SDpnt;
2280 struct Scsi_Host * shpnt;
2281 struct Scsi_Device_Template * sdtpnt;
2282 #ifdef FOO_ON_YOU
2283 return;
2284 #endif
2285
2286
2287 dispatch_scsi_info_ptr = dispatch_scsi_info;
2288
2289
2290 scsi_loadable_module_flag = 0;
2291
2292 timer_table[SCSI_TIMER].fn = scsi_main_timeout;
2293 timer_table[SCSI_TIMER].expires = 0;
2294
2295
2296
2297 #if CONFIG_PROC_FS
2298 proc_scsi_register(0, &proc_scsi_scsi);
2299 #endif
2300
2301
2302 scsi_init();
2303
2304 scsi_devices = (Scsi_Device *) NULL;
2305
2306 for (shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next)
2307 scan_scsis(shpnt,0,0,0,0);
2308
2309 printk("scsi : detected ");
2310 for (sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2311 if (sdtpnt->dev_noticed && sdtpnt->name)
2312 printk("%d SCSI %s%s ", sdtpnt->dev_noticed, sdtpnt->name,
2313 (sdtpnt->dev_noticed != 1) ? "s" : "");
2314 printk("total.\n");
2315
2316 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2317 if(sdtpnt->init && sdtpnt->dev_noticed) (*sdtpnt->init)();
2318
2319 for (SDpnt=scsi_devices; SDpnt; SDpnt = SDpnt->next) {
2320 SDpnt->scsi_request_fn = NULL;
2321 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2322 if(sdtpnt->attach) (*sdtpnt->attach)(SDpnt);
2323 if(SDpnt->attached) scsi_build_commandblocks(SDpnt);
2324 }
2325
2326
2327
2328
2329
2330 resize_dma_pool();
2331
2332
2333
2334
2335
2336 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2337 if(sdtpnt->finish && sdtpnt->nr_dev)
2338 (*sdtpnt->finish)();
2339
2340 scsi_loadable_module_flag = 1;
2341
2342 return 0;
2343 }
2344
2345 static void print_inquiry(unsigned char *data)
2346 {
2347 int i;
2348
2349 printk(" Vendor: ");
2350 for (i = 8; i < 16; i++)
2351 {
2352 if (data[i] >= 0x20 && i < data[4] + 5)
2353 printk("%c", data[i]);
2354 else
2355 printk(" ");
2356 }
2357
2358 printk(" Model: ");
2359 for (i = 16; i < 32; i++)
2360 {
2361 if (data[i] >= 0x20 && i < data[4] + 5)
2362 printk("%c", data[i]);
2363 else
2364 printk(" ");
2365 }
2366
2367 printk(" Rev: ");
2368 for (i = 32; i < 36; i++)
2369 {
2370 if (data[i] >= 0x20 && i < data[4] + 5)
2371 printk("%c", data[i]);
2372 else
2373 printk(" ");
2374 }
2375
2376 printk("\n");
2377
2378 i = data[0] & 0x1f;
2379
2380 printk(" Type: %s ",
2381 i < MAX_SCSI_DEVICE_CODE ? scsi_device_types[i] : "Unknown " );
2382 printk(" ANSI SCSI revision: %02x", data[2] & 0x07);
2383 if ((data[2] & 0x07) == 1 && (data[3] & 0x0f) == 1)
2384 printk(" CCS\n");
2385 else
2386 printk("\n");
2387 }
2388
2389
2390 #ifdef CONFIG_PROC_FS
2391 int scsi_proc_info(char *buffer, char **start, off_t offset, int length,
2392 int hostno, int inout)
2393 {
2394 Scsi_Device *scd;
2395 struct Scsi_Host *HBA_ptr;
2396 int parameter[4];
2397 char *p;
2398 int size, len = 0;
2399 off_t begin = 0;
2400 off_t pos = 0;
2401
2402 scd = scsi_devices;
2403 HBA_ptr = scsi_hostlist;
2404
2405 if(inout == 0) {
2406 size = sprintf(buffer+len,"Attached devices: %s\n", (scd)?"":"none");
2407 len += size;
2408 pos = begin + len;
2409 while (HBA_ptr) {
2410 #if 0
2411 size += sprintf(buffer+len,"scsi%2d: %s\n", (int) HBA_ptr->host_no,
2412 HBA_ptr->hostt->procname);
2413 len += size;
2414 pos = begin + len;
2415 #endif
2416 scd = scsi_devices;
2417 while (scd) {
2418 if (scd->host == HBA_ptr) {
2419 proc_print_scsidevice(scd, buffer, &size, len);
2420 len += size;
2421 pos = begin + len;
2422
2423 if (pos < offset) {
2424 len = 0;
2425 begin = pos;
2426 }
2427 if (pos > offset + length)
2428 goto stop_output;
2429 }
2430 scd = scd->next;
2431 }
2432 HBA_ptr = HBA_ptr->next;
2433 }
2434
2435 stop_output:
2436 *start=buffer+(offset-begin);
2437 len-=(offset-begin);
2438 if(len>length)
2439 len = length;
2440 return (len);
2441 }
2442
2443 if(!buffer || length < 25 || strncmp("scsi", buffer, 4))
2444 return(-EINVAL);
2445
2446 if(!strncmp("singledevice", buffer + 5, 12)) {
2447 p = buffer + 17;
2448
2449 parameter[0] = simple_strtoul(p , &p, 0);
2450 parameter[1] = simple_strtoul(p , &p, 0);
2451 parameter[2] = simple_strtoul(p , &p, 0);
2452 parameter[3] = simple_strtoul(p , &p, 0);
2453
2454 while(scd && scd->host->host_no != parameter[0]
2455 && scd->channel != parameter[1]
2456 && scd->id != parameter[2]
2457 && scd->lun != parameter[3]) {
2458 scd = scd->next;
2459 }
2460 if(scd)
2461 return(-ENOSYS);
2462 while(HBA_ptr && HBA_ptr->host_no != parameter[0])
2463 HBA_ptr = HBA_ptr->next;
2464
2465 if(!HBA_ptr)
2466 return(-ENXIO);
2467
2468 scan_scsis (HBA_ptr, 1, parameter[1], parameter[2], parameter[3]);
2469 return(0);
2470 }
2471 return(-EINVAL);
2472 }
2473 #endif
2474
2475
2476
2477
2478
2479 static void resize_dma_pool(void)
2480 {
2481 int i;
2482 struct Scsi_Host * shpnt;
2483 struct Scsi_Host * host = NULL;
2484 Scsi_Device * SDpnt;
2485 unsigned long flags;
2486 unsigned char * new_dma_malloc_freelist = NULL;
2487 unsigned int new_dma_sectors = 0;
2488 unsigned int new_need_isa_buffer = 0;
2489 unsigned char ** new_dma_malloc_pages = NULL;
2490
2491 if( !scsi_devices )
2492 {
2493
2494
2495
2496 if( dma_free_sectors != dma_sectors )
2497 panic("SCSI DMA pool memory leak %d %d\n",dma_free_sectors,dma_sectors);
2498
2499 for(i=0; i < dma_sectors >> 3; i++)
2500 scsi_init_free(dma_malloc_pages[i], PAGE_SIZE);
2501 if (dma_malloc_pages)
2502 scsi_init_free((char *) dma_malloc_pages,
2503 (dma_sectors>>3)*sizeof(*dma_malloc_pages));
2504 dma_malloc_pages = NULL;
2505 if (dma_malloc_freelist)
2506 scsi_init_free(dma_malloc_freelist, dma_sectors>>3);
2507 dma_malloc_freelist = NULL;
2508 dma_sectors = 0;
2509 dma_free_sectors = 0;
2510 return;
2511 }
2512
2513
2514 new_dma_sectors = 16;
2515
2516 if (high_memory-1 > ISA_DMA_THRESHOLD)
2517 scsi_need_isa_bounce_buffers = 1;
2518 else
2519 scsi_need_isa_bounce_buffers = 0;
2520
2521 if (scsi_devicelist)
2522 for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
2523 new_dma_sectors += 8;
2524
2525 for (SDpnt=scsi_devices; SDpnt; SDpnt = SDpnt->next) {
2526 host = SDpnt->host;
2527
2528 if(SDpnt->type != TYPE_TAPE)
2529 new_dma_sectors += ((host->sg_tablesize *
2530 sizeof(struct scatterlist) + 511) >> 9) *
2531 host->cmd_per_lun;
2532
2533 if(host->unchecked_isa_dma &&
2534 scsi_need_isa_bounce_buffers &&
2535 SDpnt->type != TYPE_TAPE) {
2536 new_dma_sectors += (PAGE_SIZE >> 9) * host->sg_tablesize *
2537 host->cmd_per_lun;
2538 new_need_isa_buffer++;
2539 }
2540 }
2541
2542 new_dma_sectors = (new_dma_sectors + 15) & 0xfff0;
2543
2544
2545
2546
2547
2548
2549 if( new_dma_sectors < dma_sectors )
2550 new_dma_sectors = dma_sectors;
2551
2552 if (new_dma_sectors)
2553 {
2554 new_dma_malloc_freelist = (unsigned char *)
2555 scsi_init_malloc(new_dma_sectors >> 3, GFP_ATOMIC);
2556 memset(new_dma_malloc_freelist, 0, new_dma_sectors >> 3);
2557
2558 new_dma_malloc_pages = (unsigned char **)
2559 scsi_init_malloc((new_dma_sectors>>3)*sizeof(*new_dma_malloc_pages),
2560 GFP_ATOMIC);
2561 memset(new_dma_malloc_pages, 0,
2562 (new_dma_sectors>>3)*sizeof(*new_dma_malloc_pages));
2563 }
2564
2565
2566
2567
2568 if( new_dma_sectors > dma_sectors ) {
2569 for(i=dma_sectors >> 3; i< new_dma_sectors >> 3; i++)
2570 new_dma_malloc_pages[i] = (unsigned char *)
2571 scsi_init_malloc(PAGE_SIZE, GFP_ATOMIC | GFP_DMA);
2572 }
2573
2574
2575
2576
2577 save_flags(flags);
2578 cli();
2579 if (dma_malloc_freelist)
2580 {
2581 memcpy(new_dma_malloc_freelist, dma_malloc_freelist, dma_sectors >> 3);
2582 scsi_init_free(dma_malloc_freelist, dma_sectors>>3);
2583 }
2584 dma_malloc_freelist = new_dma_malloc_freelist;
2585
2586 if (dma_malloc_pages)
2587 {
2588 memcpy(new_dma_malloc_pages, dma_malloc_pages,
2589 (dma_sectors>>3)*sizeof(*dma_malloc_pages));
2590 scsi_init_free((char *) dma_malloc_pages,
2591 (dma_sectors>>3)*sizeof(*dma_malloc_pages));
2592 }
2593
2594 dma_free_sectors += new_dma_sectors - dma_sectors;
2595 dma_malloc_pages = new_dma_malloc_pages;
2596 dma_sectors = new_dma_sectors;
2597 need_isa_buffer = new_need_isa_buffer;
2598 restore_flags(flags);
2599 }
2600
2601
2602
2603
2604
2605 static int scsi_register_host(Scsi_Host_Template * tpnt)
2606 {
2607 int pcount;
2608 struct Scsi_Host * shpnt;
2609 Scsi_Device * SDpnt;
2610 struct Scsi_Device_Template * sdtpnt;
2611 const char * name;
2612
2613 if (tpnt->next || !tpnt->detect) return 1;
2614
2615
2616 pcount = next_scsi_host;
2617 if ((tpnt->present = tpnt->detect(tpnt)))
2618 {
2619 if(pcount == next_scsi_host) {
2620 if(tpnt->present > 1) {
2621 printk("Failure to register low-level scsi driver");
2622 scsi_unregister_host(tpnt);
2623 return 1;
2624 }
2625
2626
2627
2628 scsi_register(tpnt,0);
2629 }
2630 tpnt->next = scsi_hosts;
2631 scsi_hosts = tpnt;
2632
2633
2634 #if CONFIG_PROC_FS
2635 build_proc_dir_entries(tpnt);
2636 #endif
2637
2638 for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
2639 if(shpnt->hostt == tpnt)
2640 {
2641 if(tpnt->info)
2642 name = tpnt->info(shpnt);
2643 else
2644 name = tpnt->name;
2645 printk ("scsi%d : %s\n",
2646 shpnt->host_no, name);
2647 }
2648
2649 printk ("scsi : %d host%s.\n", next_scsi_host,
2650 (next_scsi_host == 1) ? "" : "s");
2651
2652 scsi_make_blocked_list();
2653
2654
2655
2656
2657
2658 for(shpnt=scsi_hostlist; shpnt; shpnt = shpnt->next)
2659 if(shpnt->hostt == tpnt) scan_scsis(shpnt,0,0,0,0);
2660
2661 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2662 if(sdtpnt->init && sdtpnt->dev_noticed) (*sdtpnt->init)();
2663
2664
2665
2666 for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
2667 if(SDpnt->host->hostt == tpnt)
2668 {
2669 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2670 if(sdtpnt->attach) (*sdtpnt->attach)(SDpnt);
2671 if(SDpnt->attached) scsi_build_commandblocks(SDpnt);
2672 }
2673
2674
2675
2676
2677 resize_dma_pool();
2678
2679
2680
2681 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2682 if(sdtpnt->finish && sdtpnt->nr_dev)
2683 (*sdtpnt->finish)();
2684 }
2685
2686 #if defined(USE_STATIC_SCSI_MEMORY)
2687 printk ("SCSI memory: total %ldKb, used %ldKb, free %ldKb.\n",
2688 (scsi_memory_upper_value - scsi_memory_lower_value) / 1024,
2689 (scsi_init_memory_start - scsi_memory_lower_value) / 1024,
2690 (scsi_memory_upper_value - scsi_init_memory_start) / 1024);
2691 #endif
2692
2693 MOD_INC_USE_COUNT;
2694 return 0;
2695 }
2696
2697
2698
2699
2700
2701 static void scsi_unregister_host(Scsi_Host_Template * tpnt)
2702 {
2703 Scsi_Host_Template * SHT, *SHTp;
2704 Scsi_Device *sdpnt, * sdppnt, * sdpnt1;
2705 Scsi_Cmnd * SCpnt;
2706 unsigned long flags;
2707 struct Scsi_Device_Template * sdtpnt;
2708 struct Scsi_Host * shpnt, *sh1;
2709 int pcount;
2710
2711
2712
2713
2714 for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
2715 if(sdpnt->host->hostt == tpnt && sdpnt->host->hostt->usage_count
2716 && *sdpnt->host->hostt->usage_count) return;
2717
2718 for(shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next)
2719 {
2720 if (shpnt->hostt != tpnt) continue;
2721 for(SCpnt = shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
2722 {
2723 save_flags(flags);
2724 cli();
2725 if(SCpnt->request.rq_status != RQ_INACTIVE) {
2726 restore_flags(flags);
2727 for(SCpnt = shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
2728 if(SCpnt->request.rq_status == RQ_SCSI_DISCONNECTING)
2729 SCpnt->request.rq_status = RQ_INACTIVE;
2730 printk("Device busy???\n");
2731 return;
2732 }
2733 SCpnt->request.rq_status = RQ_SCSI_DISCONNECTING;
2734 restore_flags(flags);
2735 }
2736 }
2737
2738
2739 for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
2740 if(sdpnt->host->hostt == tpnt)
2741 {
2742 for(sdtpnt = scsi_devicelist; sdtpnt; sdtpnt = sdtpnt->next)
2743 if(sdtpnt->detach) (*sdtpnt->detach)(sdpnt);
2744
2745 if (sdpnt->attached) {
2746 printk("Attached usage count = %d\n", sdpnt->attached);
2747 return;
2748 }
2749 }
2750
2751
2752
2753 for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt->next)
2754 if(sdpnt->host->hostt == tpnt)
2755 while (sdpnt->host->host_queue) {
2756 SCpnt = sdpnt->host->host_queue->next;
2757 scsi_init_free((char *) sdpnt->host->host_queue, sizeof(Scsi_Cmnd));
2758 sdpnt->host->host_queue = SCpnt;
2759 if (SCpnt) SCpnt->prev = NULL;
2760 sdpnt->has_cmdblocks = 0;
2761 }
2762
2763
2764
2765 sdppnt = NULL;
2766 for(sdpnt = scsi_devices; sdpnt; sdpnt = sdpnt1)
2767 {
2768 sdpnt1 = sdpnt->next;
2769 if (sdpnt->host->hostt == tpnt) {
2770 if (sdppnt)
2771 sdppnt->next = sdpnt->next;
2772 else
2773 scsi_devices = sdpnt->next;
2774 scsi_init_free((char *) sdpnt, sizeof (Scsi_Device));
2775 } else
2776 sdppnt = sdpnt;
2777 }
2778
2779
2780
2781
2782 shpnt = scsi_hostlist;
2783 while(shpnt) {
2784 sh1 = shpnt->next;
2785 if(shpnt->hostt == tpnt) {
2786 if(shpnt->loaded_as_module) {
2787 pcount = next_scsi_host;
2788
2789 #if CONFIG_PROC_FS
2790 proc_scsi_unregister(tpnt->proc_dir,
2791 shpnt->host_no + PROC_SCSI_FILE);
2792 #endif
2793 if(tpnt->release)
2794 (*tpnt->release)(shpnt);
2795 else {
2796
2797
2798
2799
2800 if (shpnt->irq) free_irq(shpnt->irq);
2801 if (shpnt->dma_channel != 0xff) free_dma(shpnt->dma_channel);
2802 if (shpnt->io_port && shpnt->n_io_port)
2803 release_region(shpnt->io_port, shpnt->n_io_port);
2804 }
2805 if(pcount == next_scsi_host) scsi_unregister(shpnt);
2806 tpnt->present--;
2807 }
2808 }
2809 shpnt = sh1;
2810 }
2811
2812
2813
2814
2815
2816
2817 if( !scsi_devices )
2818 resize_dma_pool();
2819
2820 printk ("scsi : %d host%s.\n", next_scsi_host,
2821 (next_scsi_host == 1) ? "" : "s");
2822
2823 #if defined(USE_STATIC_SCSI_MEMORY)
2824 printk ("SCSI memory: total %ldKb, used %ldKb, free %ldKb.\n",
2825 (scsi_memory_upper_value - scsi_memory_lower_value) / 1024,
2826 (scsi_init_memory_start - scsi_memory_lower_value) / 1024,
2827 (scsi_memory_upper_value - scsi_init_memory_start) / 1024);
2828 #endif
2829
2830 scsi_make_blocked_list();
2831
2832
2833
2834 if (tpnt->present) return;
2835
2836
2837
2838 for(SHTp=NULL, SHT=scsi_hosts; SHT; SHTp=SHT, SHT=SHT->next)
2839 if(SHT == tpnt) {
2840 if(SHTp)
2841 SHTp->next = SHT->next;
2842 else
2843 scsi_hosts = SHT->next;
2844 SHT->next = NULL;
2845 break;
2846 }
2847
2848
2849 #if CONFIG_PROC_FS
2850 proc_scsi_unregister(tpnt->proc_dir, tpnt->proc_dir->low_ino);
2851 #endif
2852 MOD_DEC_USE_COUNT;
2853 }
2854
2855
2856
2857
2858
2859 static int scsi_register_device_module(struct Scsi_Device_Template * tpnt)
2860 {
2861 Scsi_Device * SDpnt;
2862
2863 if (tpnt->next) return 1;
2864
2865 scsi_register_device(tpnt);
2866
2867
2868
2869
2870 for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
2871 if(tpnt->detect) SDpnt->attached += (*tpnt->detect)(SDpnt);
2872
2873
2874
2875
2876
2877 if(tpnt->init && tpnt->dev_noticed)
2878 if ((*tpnt->init)()) return 1;
2879
2880
2881
2882
2883 for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
2884 {
2885 if(tpnt->attach) (*tpnt->attach)(SDpnt);
2886
2887
2888
2889
2890 if(SDpnt->attached && SDpnt->has_cmdblocks == 0)
2891 scsi_build_commandblocks(SDpnt);
2892 }
2893
2894
2895
2896
2897 if(tpnt->finish && tpnt->nr_dev) (*tpnt->finish)();
2898 MOD_INC_USE_COUNT;
2899 return 0;
2900 }
2901
2902 static int scsi_unregister_device(struct Scsi_Device_Template * tpnt)
2903 {
2904 Scsi_Device * SDpnt;
2905 Scsi_Cmnd * SCpnt;
2906 struct Scsi_Device_Template * spnt;
2907 struct Scsi_Device_Template * prev_spnt;
2908
2909
2910
2911
2912 if( *tpnt->usage_count != 0) return 0;
2913
2914
2915
2916
2917 for(SDpnt = scsi_devices; SDpnt; SDpnt = SDpnt->next)
2918 {
2919 if(tpnt->detach) (*tpnt->detach)(SDpnt);
2920 if(SDpnt->attached == 0)
2921 {
2922
2923
2924
2925
2926 for(SCpnt = SDpnt->host->host_queue; SCpnt; SCpnt = SCpnt->next)
2927 {
2928 if(SCpnt->device == SDpnt)
2929 {
2930 if(SCpnt->prev != NULL)
2931 SCpnt->prev->next = SCpnt->next;
2932 if(SCpnt->next != NULL)
2933 SCpnt->next->prev = SCpnt->prev;
2934 if(SCpnt == SDpnt->host->host_queue)
2935 SDpnt->host->host_queue = SCpnt->next;
2936 scsi_init_free((char *) SCpnt, sizeof(*SCpnt));
2937 }
2938 }
2939 SDpnt->has_cmdblocks = 0;
2940 }
2941 }
2942
2943
2944
2945 spnt = scsi_devicelist;
2946 prev_spnt = NULL;
2947 while(spnt != tpnt)
2948 {
2949 prev_spnt = spnt;
2950 spnt = spnt->next;
2951 }
2952 if(prev_spnt == NULL)
2953 scsi_devicelist = tpnt->next;
2954 else
2955 prev_spnt->next = spnt->next;
2956
2957 MOD_DEC_USE_COUNT;
2958
2959
2960
2961
2962 return 0;
2963 }
2964
2965
2966 int scsi_register_module(int module_type, void * ptr)
2967 {
2968 switch(module_type){
2969 case MODULE_SCSI_HA:
2970 return scsi_register_host((Scsi_Host_Template *) ptr);
2971
2972
2973 case MODULE_SCSI_DEV:
2974 return scsi_register_device_module((struct Scsi_Device_Template *) ptr);
2975
2976
2977
2978 case MODULE_SCSI_CONST:
2979
2980
2981
2982 case MODULE_SCSI_IOCTL:
2983
2984 default:
2985 return 1;
2986 }
2987 }
2988
2989 void scsi_unregister_module(int module_type, void * ptr)
2990 {
2991 switch(module_type) {
2992 case MODULE_SCSI_HA:
2993 scsi_unregister_host((Scsi_Host_Template *) ptr);
2994 break;
2995 case MODULE_SCSI_DEV:
2996 scsi_unregister_device((struct Scsi_Device_Template *) ptr);
2997 break;
2998
2999 case MODULE_SCSI_CONST:
3000 case MODULE_SCSI_IOCTL:
3001 break;
3002 default:
3003 }
3004 return;
3005 }
3006
3007 #ifdef DEBUG_TIMEOUT
3008 static void
3009 scsi_dump_status(void)
3010 {
3011 int i;
3012 struct Scsi_Host * shpnt;
3013 Scsi_Cmnd * SCpnt;
3014 printk("Dump of scsi parameters:\n");
3015 i = 0;
3016 for(shpnt = scsi_hostlist; shpnt; shpnt = shpnt->next)
3017 for(SCpnt=shpnt->host_queue; SCpnt; SCpnt = SCpnt->next)
3018 {
3019
3020 printk("(%d) %d:%d:%d:%d (%s %ld %ld %ld %ld) (%d %d %x) (%d %d %d) %x %x %x\n",
3021 i++, SCpnt->host->host_no,
3022 SCpnt->channel,
3023 SCpnt->target,
3024 SCpnt->lun,
3025 kdevname(SCpnt->request.rq_dev),
3026 SCpnt->request.sector,
3027 SCpnt->request.nr_sectors,
3028 SCpnt->request.current_nr_sectors,
3029 SCpnt->use_sg,
3030 SCpnt->retries,
3031 SCpnt->allowed,
3032 SCpnt->flags,
3033 SCpnt->timeout_per_command,
3034 SCpnt->timeout,
3035 SCpnt->internal_timeout,
3036 SCpnt->cmnd[0],
3037 SCpnt->sense_buffer[2],
3038 SCpnt->result);
3039 }
3040 printk("wait_for_request = %p\n", wait_for_request);
3041
3042 printk("Dump of pending block device requests\n");
3043 for(i=0; i<MAX_BLKDEV; i++)
3044 if(blk_dev[i].current_request)
3045 {
3046 struct request * req;
3047 printk("%d: ", i);
3048 req = blk_dev[i].current_request;
3049 while(req) {
3050 printk("(%s %d %ld %ld %ld) ",
3051 kdevname(req->rq_dev),
3052 req->cmd,
3053 req->sector,
3054 req->nr_sectors,
3055 req->current_nr_sectors);
3056 req = req->next;
3057 }
3058 printk("\n");
3059 }
3060 }
3061 #endif
3062
3063 #ifdef MODULE
3064
3065 extern struct symbol_table scsi_symbol_table;
3066
3067 int init_module(void) {
3068
3069
3070
3071 dispatch_scsi_info_ptr = dispatch_scsi_info;
3072
3073 timer_table[SCSI_TIMER].fn = scsi_main_timeout;
3074 timer_table[SCSI_TIMER].expires = 0;
3075 register_symtab(&scsi_symbol_table);
3076 scsi_loadable_module_flag = 1;
3077
3078 dma_sectors = PAGE_SIZE / 512;
3079 dma_free_sectors= dma_sectors;
3080
3081
3082
3083
3084
3085
3086 dma_malloc_freelist = (unsigned char *)
3087 scsi_init_malloc(dma_sectors >> 3, GFP_ATOMIC);
3088 memset(dma_malloc_freelist, 0, dma_sectors >> 3);
3089
3090
3091 dma_malloc_pages = (unsigned char **)
3092 scsi_init_malloc((dma_sectors >> 3)*sizeof(*dma_malloc_pages), GFP_ATOMIC);
3093 dma_malloc_pages[0] = (unsigned char *)
3094 scsi_init_malloc(PAGE_SIZE, GFP_ATOMIC | GFP_DMA);
3095 return 0;
3096 }
3097
3098 void cleanup_module( void)
3099 {
3100 if (MOD_IN_USE) {
3101 printk(KERN_INFO __FILE__ ": module is in use, remove rejected\n");
3102 return;
3103 }
3104
3105
3106 dispatch_scsi_info_ptr = 0L;
3107
3108
3109
3110
3111 resize_dma_pool();
3112
3113 timer_table[SCSI_TIMER].fn = NULL;
3114 timer_table[SCSI_TIMER].expires = 0;
3115 }
3116 #endif
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135