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89#include <scsi/scsi_dbg.h>
90#include <scsi/scsi_transport_spi.h>
91
92#ifndef NDEBUG
93#define NDEBUG 0
94#endif
95#ifndef NDEBUG_ABORT
96#define NDEBUG_ABORT 0
97#endif
98
99#if (NDEBUG & NDEBUG_LISTS)
100#define LIST(x,y) {printk("LINE:%d Adding %p to %p\n", __LINE__, (void*)(x), (void*)(y)); if ((x)==(y)) udelay(5); }
101#define REMOVE(w,x,y,z) {printk("LINE:%d Removing: %p->%p %p->%p \n", __LINE__, (void*)(w), (void*)(x), (void*)(y), (void*)(z)); if ((x)==(y)) udelay(5); }
102#else
103#define LIST(x,y)
104#define REMOVE(w,x,y,z)
105#endif
106
107#ifndef notyet
108#undef LINKED
109#undef REAL_DMA
110#endif
111
112#ifdef REAL_DMA_POLL
113#undef READ_OVERRUNS
114#define READ_OVERRUNS
115#endif
116
117#ifdef BOARD_REQUIRES_NO_DELAY
118#define io_recovery_delay(x)
119#else
120#define io_recovery_delay(x) udelay(x)
121#endif
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281static int do_abort(struct Scsi_Host *host);
282static void do_reset(struct Scsi_Host *host);
283
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289
290
291static __inline__ void initialize_SCp(Scsi_Cmnd * cmd)
292{
293
294
295
296
297
298 if (scsi_bufflen(cmd)) {
299 cmd->SCp.buffer = scsi_sglist(cmd);
300 cmd->SCp.buffers_residual = scsi_sg_count(cmd) - 1;
301 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
302 cmd->SCp.this_residual = cmd->SCp.buffer->length;
303 } else {
304 cmd->SCp.buffer = NULL;
305 cmd->SCp.buffers_residual = 0;
306 cmd->SCp.ptr = NULL;
307 cmd->SCp.this_residual = 0;
308 }
309}
310
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324
325static int NCR5380_poll_politely(struct Scsi_Host *instance, int reg, int bit, int val, int t)
326{
327 NCR5380_local_declare();
328 int n = 500;
329 unsigned long end = jiffies + t;
330 int r;
331
332 NCR5380_setup(instance);
333
334 while( n-- > 0)
335 {
336 r = NCR5380_read(reg);
337 if((r & bit) == val)
338 return 0;
339 cpu_relax();
340 }
341
342
343 while(time_before(jiffies, end))
344 {
345 r = NCR5380_read(reg);
346 if((r & bit) == val)
347 return 0;
348 if(!in_interrupt())
349 cond_resched();
350 else
351 cpu_relax();
352 }
353 return -ETIMEDOUT;
354}
355
356static struct {
357 unsigned char value;
358 const char *name;
359} phases[] __maybe_unused = {
360 {PHASE_DATAOUT, "DATAOUT"},
361 {PHASE_DATAIN, "DATAIN"},
362 {PHASE_CMDOUT, "CMDOUT"},
363 {PHASE_STATIN, "STATIN"},
364 {PHASE_MSGOUT, "MSGOUT"},
365 {PHASE_MSGIN, "MSGIN"},
366 {PHASE_UNKNOWN, "UNKNOWN"}
367};
368
369#if NDEBUG
370static struct {
371 unsigned char mask;
372 const char *name;
373} signals[] = {
374 {SR_DBP, "PARITY"},
375 {SR_RST, "RST"},
376 {SR_BSY, "BSY"},
377 {SR_REQ, "REQ"},
378 {SR_MSG, "MSG"},
379 {SR_CD, "CD"},
380 {SR_IO, "IO"},
381 {SR_SEL, "SEL"},
382 {0, NULL}
383},
384basrs[] = {
385 {BASR_ATN, "ATN"},
386 {BASR_ACK, "ACK"},
387 {0, NULL}
388},
389icrs[] = {
390 {ICR_ASSERT_RST, "ASSERT RST"},
391 {ICR_ASSERT_ACK, "ASSERT ACK"},
392 {ICR_ASSERT_BSY, "ASSERT BSY"},
393 {ICR_ASSERT_SEL, "ASSERT SEL"},
394 {ICR_ASSERT_ATN, "ASSERT ATN"},
395 {ICR_ASSERT_DATA, "ASSERT DATA"},
396 {0, NULL}
397},
398mrs[] = {
399 {MR_BLOCK_DMA_MODE, "MODE BLOCK DMA"},
400 {MR_TARGET, "MODE TARGET"},
401 {MR_ENABLE_PAR_CHECK, "MODE PARITY CHECK"},
402 {MR_ENABLE_PAR_INTR, "MODE PARITY INTR"},
403 {MR_MONITOR_BSY, "MODE MONITOR BSY"},
404 {MR_DMA_MODE, "MODE DMA"},
405 {MR_ARBITRATE, "MODE ARBITRATION"},
406 {0, NULL}
407};
408
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415
416
417
418static void NCR5380_print(struct Scsi_Host *instance)
419{
420 NCR5380_local_declare();
421 unsigned char status, data, basr, mr, icr, i;
422 NCR5380_setup(instance);
423
424 data = NCR5380_read(CURRENT_SCSI_DATA_REG);
425 status = NCR5380_read(STATUS_REG);
426 mr = NCR5380_read(MODE_REG);
427 icr = NCR5380_read(INITIATOR_COMMAND_REG);
428 basr = NCR5380_read(BUS_AND_STATUS_REG);
429
430 printk("STATUS_REG: %02x ", status);
431 for (i = 0; signals[i].mask; ++i)
432 if (status & signals[i].mask)
433 printk(",%s", signals[i].name);
434 printk("\nBASR: %02x ", basr);
435 for (i = 0; basrs[i].mask; ++i)
436 if (basr & basrs[i].mask)
437 printk(",%s", basrs[i].name);
438 printk("\nICR: %02x ", icr);
439 for (i = 0; icrs[i].mask; ++i)
440 if (icr & icrs[i].mask)
441 printk(",%s", icrs[i].name);
442 printk("\nMODE: %02x ", mr);
443 for (i = 0; mrs[i].mask; ++i)
444 if (mr & mrs[i].mask)
445 printk(",%s", mrs[i].name);
446 printk("\n");
447}
448
449
450
451
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456
457
458
459static void NCR5380_print_phase(struct Scsi_Host *instance)
460{
461 NCR5380_local_declare();
462 unsigned char status;
463 int i;
464 NCR5380_setup(instance);
465
466 status = NCR5380_read(STATUS_REG);
467 if (!(status & SR_REQ))
468 printk("scsi%d : REQ not asserted, phase unknown.\n", instance->host_no);
469 else {
470 for (i = 0; (phases[i].value != PHASE_UNKNOWN) && (phases[i].value != (status & PHASE_MASK)); ++i);
471 printk("scsi%d : phase %s\n", instance->host_no, phases[i].name);
472 }
473}
474#endif
475
476
477
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483
484
485
486#ifndef USLEEP_SLEEP
487
488#define USLEEP_SLEEP (20*HZ/1000)
489#endif
490
491#ifndef USLEEP_POLL
492#define USLEEP_POLL (200*HZ/1000)
493#endif
494#ifndef USLEEP_WAITLONG
495
496#define USLEEP_WAITLONG USLEEP_SLEEP
497#endif
498
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520
521static int should_disconnect(unsigned char cmd)
522{
523 switch (cmd) {
524 case READ_6:
525 case WRITE_6:
526 case SEEK_6:
527 case READ_10:
528 case WRITE_10:
529 case SEEK_10:
530 return DISCONNECT_TIME_TO_DATA;
531 case FORMAT_UNIT:
532 case SEARCH_HIGH:
533 case SEARCH_LOW:
534 case SEARCH_EQUAL:
535 return DISCONNECT_LONG;
536 default:
537 return DISCONNECT_NONE;
538 }
539}
540
541static void NCR5380_set_timer(struct NCR5380_hostdata *hostdata, unsigned long timeout)
542{
543 hostdata->time_expires = jiffies + timeout;
544 schedule_delayed_work(&hostdata->coroutine, timeout);
545}
546
547
548static int probe_irq __initdata = 0;
549
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559
560static irqreturn_t __init probe_intr(int irq, void *dev_id)
561{
562 probe_irq = irq;
563 return IRQ_HANDLED;
564}
565
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576
577static int __init __maybe_unused NCR5380_probe_irq(struct Scsi_Host *instance,
578 int possible)
579{
580 NCR5380_local_declare();
581 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
582 unsigned long timeout;
583 int trying_irqs, i, mask;
584 NCR5380_setup(instance);
585
586 for (trying_irqs = i = 0, mask = 1; i < 16; ++i, mask <<= 1)
587 if ((mask & possible) && (request_irq(i, &probe_intr, IRQF_DISABLED, "NCR-probe", NULL) == 0))
588 trying_irqs |= mask;
589
590 timeout = jiffies + (250 * HZ / 1000);
591 probe_irq = SCSI_IRQ_NONE;
592
593
594
595
596
597
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599
600
601
602
603 NCR5380_write(TARGET_COMMAND_REG, 0);
604 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
605 NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
606 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_SEL);
607
608 while (probe_irq == SCSI_IRQ_NONE && time_before(jiffies, timeout))
609 schedule_timeout_uninterruptible(1);
610
611 NCR5380_write(SELECT_ENABLE_REG, 0);
612 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
613
614 for (i = 0, mask = 1; i < 16; ++i, mask <<= 1)
615 if (trying_irqs & mask)
616 free_irq(i, NULL);
617
618 return probe_irq;
619}
620
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631
632static void __init __maybe_unused
633NCR5380_print_options(struct Scsi_Host *instance)
634{
635 printk(" generic options"
636#ifdef AUTOPROBE_IRQ
637 " AUTOPROBE_IRQ"
638#endif
639#ifdef AUTOSENSE
640 " AUTOSENSE"
641#endif
642#ifdef DIFFERENTIAL
643 " DIFFERENTIAL"
644#endif
645#ifdef REAL_DMA
646 " REAL DMA"
647#endif
648#ifdef REAL_DMA_POLL
649 " REAL DMA POLL"
650#endif
651#ifdef PARITY
652 " PARITY"
653#endif
654#ifdef PSEUDO_DMA
655 " PSEUDO DMA"
656#endif
657#ifdef UNSAFE
658 " UNSAFE "
659#endif
660 );
661 printk(" USLEEP, USLEEP_POLL=%d USLEEP_SLEEP=%d", USLEEP_POLL, USLEEP_SLEEP);
662 printk(" generic release=%d", NCR5380_PUBLIC_RELEASE);
663 if (((struct NCR5380_hostdata *) instance->hostdata)->flags & FLAG_NCR53C400) {
664 printk(" ncr53c400 release=%d", NCR53C400_PUBLIC_RELEASE);
665 }
666}
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677
678static void NCR5380_print_status(struct Scsi_Host *instance)
679{
680 NCR5380_dprint(NDEBUG_ANY, instance);
681 NCR5380_dprint_phase(NDEBUG_ANY, instance);
682}
683
684
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696
697
698#undef SPRINTF
699#define SPRINTF(args...) do { if(pos < buffer + length-80) pos += sprintf(pos, ## args); } while(0)
700static
701char *lprint_Scsi_Cmnd(Scsi_Cmnd * cmd, char *pos, char *buffer, int length);
702static
703char *lprint_command(unsigned char *cmd, char *pos, char *buffer, int len);
704static
705char *lprint_opcode(int opcode, char *pos, char *buffer, int length);
706
707static int __maybe_unused NCR5380_proc_info(struct Scsi_Host *instance,
708 char *buffer, char **start, off_t offset, int length, int inout)
709{
710 char *pos = buffer;
711 struct NCR5380_hostdata *hostdata;
712 Scsi_Cmnd *ptr;
713
714 hostdata = (struct NCR5380_hostdata *) instance->hostdata;
715
716 if (inout) {
717#ifdef DTC_PUBLIC_RELEASE
718 dtc_wmaxi = dtc_maxi = 0;
719#endif
720#ifdef PAS16_PUBLIC_RELEASE
721 pas_wmaxi = pas_maxi = 0;
722#endif
723 return (-ENOSYS);
724 }
725 SPRINTF("NCR5380 core release=%d. ", NCR5380_PUBLIC_RELEASE);
726 if (((struct NCR5380_hostdata *) instance->hostdata)->flags & FLAG_NCR53C400)
727 SPRINTF("ncr53c400 release=%d. ", NCR53C400_PUBLIC_RELEASE);
728#ifdef DTC_PUBLIC_RELEASE
729 SPRINTF("DTC 3180/3280 release %d", DTC_PUBLIC_RELEASE);
730#endif
731#ifdef T128_PUBLIC_RELEASE
732 SPRINTF("T128 release %d", T128_PUBLIC_RELEASE);
733#endif
734#ifdef GENERIC_NCR5380_PUBLIC_RELEASE
735 SPRINTF("Generic5380 release %d", GENERIC_NCR5380_PUBLIC_RELEASE);
736#endif
737#ifdef PAS16_PUBLIC_RELEASE
738 SPRINTF("PAS16 release=%d", PAS16_PUBLIC_RELEASE);
739#endif
740
741 SPRINTF("\nBase Addr: 0x%05lX ", (long) instance->base);
742 SPRINTF("io_port: %04x ", (int) instance->io_port);
743 if (instance->irq == SCSI_IRQ_NONE)
744 SPRINTF("IRQ: None.\n");
745 else
746 SPRINTF("IRQ: %d.\n", instance->irq);
747
748#ifdef DTC_PUBLIC_RELEASE
749 SPRINTF("Highwater I/O busy_spin_counts -- write: %d read: %d\n", dtc_wmaxi, dtc_maxi);
750#endif
751#ifdef PAS16_PUBLIC_RELEASE
752 SPRINTF("Highwater I/O busy_spin_counts -- write: %d read: %d\n", pas_wmaxi, pas_maxi);
753#endif
754 spin_lock_irq(instance->host_lock);
755 if (!hostdata->connected)
756 SPRINTF("scsi%d: no currently connected command\n", instance->host_no);
757 else
758 pos = lprint_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected, pos, buffer, length);
759 SPRINTF("scsi%d: issue_queue\n", instance->host_no);
760 for (ptr = (Scsi_Cmnd *) hostdata->issue_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
761 pos = lprint_Scsi_Cmnd(ptr, pos, buffer, length);
762
763 SPRINTF("scsi%d: disconnected_queue\n", instance->host_no);
764 for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr; ptr = (Scsi_Cmnd *) ptr->host_scribble)
765 pos = lprint_Scsi_Cmnd(ptr, pos, buffer, length);
766 spin_unlock_irq(instance->host_lock);
767
768 *start = buffer;
769 if (pos - buffer < offset)
770 return 0;
771 else if (pos - buffer - offset < length)
772 return pos - buffer - offset;
773 return length;
774}
775
776static char *lprint_Scsi_Cmnd(Scsi_Cmnd * cmd, char *pos, char *buffer, int length)
777{
778 SPRINTF("scsi%d : destination target %d, lun %d\n", cmd->device->host->host_no, cmd->device->id, cmd->device->lun);
779 SPRINTF(" command = ");
780 pos = lprint_command(cmd->cmnd, pos, buffer, length);
781 return (pos);
782}
783
784static char *lprint_command(unsigned char *command, char *pos, char *buffer, int length)
785{
786 int i, s;
787 pos = lprint_opcode(command[0], pos, buffer, length);
788 for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
789 SPRINTF("%02x ", command[i]);
790 SPRINTF("\n");
791 return (pos);
792}
793
794static char *lprint_opcode(int opcode, char *pos, char *buffer, int length)
795{
796 SPRINTF("%2d (0x%02x)", opcode, opcode);
797 return (pos);
798}
799
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817static int __devinit NCR5380_init(struct Scsi_Host *instance, int flags)
818{
819 NCR5380_local_declare();
820 int i, pass;
821 unsigned long timeout;
822 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
823
824 if(in_interrupt())
825 printk(KERN_ERR "NCR5380_init called with interrupts off!\n");
826
827
828
829
830
831#ifdef NCR53C400
832 if (flags & FLAG_NCR53C400)
833 instance->NCR5380_instance_name += NCR53C400_address_adjust;
834#endif
835
836 NCR5380_setup(instance);
837
838 hostdata->aborted = 0;
839 hostdata->id_mask = 1 << instance->this_id;
840 for (i = hostdata->id_mask; i <= 0x80; i <<= 1)
841 if (i > hostdata->id_mask)
842 hostdata->id_higher_mask |= i;
843 for (i = 0; i < 8; ++i)
844 hostdata->busy[i] = 0;
845#ifdef REAL_DMA
846 hostdata->dmalen = 0;
847#endif
848 hostdata->targets_present = 0;
849 hostdata->connected = NULL;
850 hostdata->issue_queue = NULL;
851 hostdata->disconnected_queue = NULL;
852
853 INIT_DELAYED_WORK(&hostdata->coroutine, NCR5380_main);
854
855#ifdef NCR5380_STATS
856 for (i = 0; i < 8; ++i) {
857 hostdata->time_read[i] = 0;
858 hostdata->time_write[i] = 0;
859 hostdata->bytes_read[i] = 0;
860 hostdata->bytes_write[i] = 0;
861 }
862 hostdata->timebase = 0;
863 hostdata->pendingw = 0;
864 hostdata->pendingr = 0;
865#endif
866
867
868 if (flags & FLAG_NCR53C400)
869 hostdata->flags = FLAG_HAS_LAST_BYTE_SENT | flags;
870 else
871 hostdata->flags = FLAG_CHECK_LAST_BYTE_SENT | flags;
872
873 hostdata->host = instance;
874 hostdata->time_expires = 0;
875
876#ifndef AUTOSENSE
877 if ((instance->cmd_per_lun > 1) || instance->can_queue > 1)
878 printk(KERN_WARNING "scsi%d : WARNING : support for multiple outstanding commands enabled\n" " without AUTOSENSE option, contingent allegiance conditions may\n"
879 " be incorrectly cleared.\n", instance->host_no);
880#endif
881
882 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
883 NCR5380_write(MODE_REG, MR_BASE);
884 NCR5380_write(TARGET_COMMAND_REG, 0);
885 NCR5380_write(SELECT_ENABLE_REG, 0);
886
887#ifdef NCR53C400
888 if (hostdata->flags & FLAG_NCR53C400) {
889 NCR5380_write(C400_CONTROL_STATUS_REG, CSR_BASE);
890 }
891#endif
892
893
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904
905 for (pass = 1; (NCR5380_read(STATUS_REG) & SR_BSY) && pass <= 6; ++pass) {
906 switch (pass) {
907 case 1:
908 case 3:
909 case 5:
910 printk(KERN_INFO "scsi%d: SCSI bus busy, waiting up to five seconds\n", instance->host_no);
911 timeout = jiffies + 5 * HZ;
912 NCR5380_poll_politely(instance, STATUS_REG, SR_BSY, 0, 5*HZ);
913 break;
914 case 2:
915 printk(KERN_WARNING "scsi%d: bus busy, attempting abort\n", instance->host_no);
916 do_abort(instance);
917 break;
918 case 4:
919 printk(KERN_WARNING "scsi%d: bus busy, attempting reset\n", instance->host_no);
920 do_reset(instance);
921 break;
922 case 6:
923 printk(KERN_ERR "scsi%d: bus locked solid or invalid override\n", instance->host_no);
924 return -ENXIO;
925 }
926 }
927 return 0;
928}
929
930
931
932
933
934
935static void NCR5380_exit(struct Scsi_Host *instance)
936{
937 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
938
939 cancel_delayed_work(&hostdata->coroutine);
940 flush_scheduled_work();
941}
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953
954
955static int NCR5380_queue_command(Scsi_Cmnd * cmd, void (*done) (Scsi_Cmnd *))
956{
957 struct Scsi_Host *instance = cmd->device->host;
958 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
959 Scsi_Cmnd *tmp;
960
961#if (NDEBUG & NDEBUG_NO_WRITE)
962 switch (cmd->cmnd[0]) {
963 case WRITE_6:
964 case WRITE_10:
965 printk("scsi%d : WRITE attempted with NO_WRITE debugging flag set\n", instance->host_no);
966 cmd->result = (DID_ERROR << 16);
967 done(cmd);
968 return 0;
969 }
970#endif
971
972#ifdef NCR5380_STATS
973 switch (cmd->cmnd[0]) {
974 case WRITE:
975 case WRITE_6:
976 case WRITE_10:
977 hostdata->time_write[cmd->device->id] -= (jiffies - hostdata->timebase);
978 hostdata->bytes_write[cmd->device->id] += scsi_bufflen(cmd);
979 hostdata->pendingw++;
980 break;
981 case READ:
982 case READ_6:
983 case READ_10:
984 hostdata->time_read[cmd->device->id] -= (jiffies - hostdata->timebase);
985 hostdata->bytes_read[cmd->device->id] += scsi_bufflen(cmd);
986 hostdata->pendingr++;
987 break;
988 }
989#endif
990
991
992
993
994
995
996 cmd->host_scribble = NULL;
997 cmd->scsi_done = done;
998 cmd->result = 0;
999
1000
1001
1002
1003
1004
1005
1006
1007 if (!(hostdata->issue_queue) || (cmd->cmnd[0] == REQUEST_SENSE)) {
1008 LIST(cmd, hostdata->issue_queue);
1009 cmd->host_scribble = (unsigned char *) hostdata->issue_queue;
1010 hostdata->issue_queue = cmd;
1011 } else {
1012 for (tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp->host_scribble; tmp = (Scsi_Cmnd *) tmp->host_scribble);
1013 LIST(cmd, tmp);
1014 tmp->host_scribble = (unsigned char *) cmd;
1015 }
1016 dprintk(NDEBUG_QUEUES, ("scsi%d : command added to %s of queue\n", instance->host_no, (cmd->cmnd[0] == REQUEST_SENSE) ? "head" : "tail"));
1017
1018
1019
1020 schedule_delayed_work(&hostdata->coroutine, 0);
1021 return 0;
1022}
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037static void NCR5380_main(struct work_struct *work)
1038{
1039 struct NCR5380_hostdata *hostdata =
1040 container_of(work, struct NCR5380_hostdata, coroutine.work);
1041 struct Scsi_Host *instance = hostdata->host;
1042 Scsi_Cmnd *tmp, *prev;
1043 int done;
1044
1045 spin_lock_irq(instance->host_lock);
1046 do {
1047
1048 done = 1;
1049 if (!hostdata->connected && !hostdata->selecting) {
1050 dprintk(NDEBUG_MAIN, ("scsi%d : not connected\n", instance->host_no));
1051
1052
1053
1054
1055 for (tmp = (Scsi_Cmnd *) hostdata->issue_queue, prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble)
1056 {
1057 if (prev != tmp)
1058 dprintk(NDEBUG_LISTS, ("MAIN tmp=%p target=%d busy=%d lun=%d\n", tmp, tmp->target, hostdata->busy[tmp->target], tmp->lun));
1059
1060 if (!(hostdata->busy[tmp->device->id] & (1 << tmp->device->lun))) {
1061 if (prev) {
1062 REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble);
1063 prev->host_scribble = tmp->host_scribble;
1064 } else {
1065 REMOVE(-1, hostdata->issue_queue, tmp, tmp->host_scribble);
1066 hostdata->issue_queue = (Scsi_Cmnd *) tmp->host_scribble;
1067 }
1068 tmp->host_scribble = NULL;
1069
1070
1071
1072
1073
1074
1075
1076 dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, ("scsi%d : main() : command for target %d lun %d removed from issue_queue\n", instance->host_no, tmp->target, tmp->lun));
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088 hostdata->selecting = NULL;
1089
1090
1091 if (!NCR5380_select(instance, tmp,
1092
1093
1094
1095
1096
1097
1098 (tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : TAG_NEXT)) {
1099 break;
1100 } else {
1101 LIST(tmp, hostdata->issue_queue);
1102 tmp->host_scribble = (unsigned char *) hostdata->issue_queue;
1103 hostdata->issue_queue = tmp;
1104 done = 0;
1105 dprintk(NDEBUG_MAIN|NDEBUG_QUEUES, ("scsi%d : main(): select() failed, returned to issue_queue\n", instance->host_no));
1106 }
1107
1108 }
1109 }
1110
1111 }
1112 if (hostdata->selecting) {
1113 tmp = (Scsi_Cmnd *) hostdata->selecting;
1114
1115 if (!NCR5380_select(instance, tmp, (tmp->cmnd[0] == REQUEST_SENSE) ? TAG_NONE : TAG_NEXT)) {
1116
1117 } else {
1118
1119
1120
1121
1122 printk(KERN_DEBUG "scsi%d: device %d did not respond in time\n", instance->host_no, tmp->device->id);
1123 LIST(tmp, hostdata->issue_queue);
1124 tmp->host_scribble = (unsigned char *) hostdata->issue_queue;
1125 hostdata->issue_queue = tmp;
1126 NCR5380_set_timer(hostdata, USLEEP_WAITLONG);
1127 }
1128 }
1129 if (hostdata->connected
1130#ifdef REAL_DMA
1131 && !hostdata->dmalen
1132#endif
1133 && (!hostdata->time_expires || time_before_eq(hostdata->time_expires, jiffies))
1134 ) {
1135 dprintk(NDEBUG_MAIN, ("scsi%d : main() : performing information transfer\n", instance->host_no));
1136 NCR5380_information_transfer(instance);
1137 dprintk(NDEBUG_MAIN, ("scsi%d : main() : done set false\n", instance->host_no));
1138 done = 0;
1139 } else
1140 break;
1141 } while (!done);
1142
1143 spin_unlock_irq(instance->host_lock);
1144}
1145
1146#ifndef DONT_USE_INTR
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160static irqreturn_t NCR5380_intr(int dummy, void *dev_id)
1161{
1162 NCR5380_local_declare();
1163 struct Scsi_Host *instance = dev_id;
1164 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
1165 int done;
1166 unsigned char basr;
1167 unsigned long flags;
1168
1169 dprintk(NDEBUG_INTR, ("scsi : NCR5380 irq %d triggered\n",
1170 instance->irq));
1171
1172 do {
1173 done = 1;
1174 spin_lock_irqsave(instance->host_lock, flags);
1175
1176 NCR5380_setup(instance);
1177 basr = NCR5380_read(BUS_AND_STATUS_REG);
1178
1179 if (basr & BASR_IRQ) {
1180 NCR5380_dprint(NDEBUG_INTR, instance);
1181 if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
1182 done = 0;
1183 dprintk(NDEBUG_INTR, ("scsi%d : SEL interrupt\n", instance->host_no));
1184 NCR5380_reselect(instance);
1185 (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
1186 } else if (basr & BASR_PARITY_ERROR) {
1187 dprintk(NDEBUG_INTR, ("scsi%d : PARITY interrupt\n", instance->host_no));
1188 (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
1189 } else if ((NCR5380_read(STATUS_REG) & SR_RST) == SR_RST) {
1190 dprintk(NDEBUG_INTR, ("scsi%d : RESET interrupt\n", instance->host_no));
1191 (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
1192 } else {
1193#if defined(REAL_DMA)
1194
1195
1196
1197
1198
1199
1200 if ((NCR5380_read(MODE_REG) & MR_DMA) && ((basr & BASR_END_DMA_TRANSFER) || !(basr & BASR_PHASE_MATCH))) {
1201 int transfered;
1202
1203 if (!hostdata->connected)
1204 panic("scsi%d : received end of DMA interrupt with no connected cmd\n", instance->hostno);
1205
1206 transfered = (hostdata->dmalen - NCR5380_dma_residual(instance));
1207 hostdata->connected->SCp.this_residual -= transferred;
1208 hostdata->connected->SCp.ptr += transferred;
1209 hostdata->dmalen = 0;
1210
1211 (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
1212
1213
1214 NCR5380_poll_politely(hostdata, BUS_AND_STATUS_REG, BASR_ACK, 0, 2*HZ);
1215
1216 NCR5380_write(MODE_REG, MR_BASE);
1217 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1218 }
1219#else
1220 dprintk(NDEBUG_INTR, ("scsi : unknown interrupt, BASR 0x%X, MR 0x%X, SR 0x%x\n", basr, NCR5380_read(MODE_REG), NCR5380_read(STATUS_REG)));
1221 (void) NCR5380_read(RESET_PARITY_INTERRUPT_REG);
1222#endif
1223 }
1224 }
1225 spin_unlock_irqrestore(instance->host_lock, flags);
1226 if(!done)
1227 schedule_delayed_work(&hostdata->coroutine, 0);
1228 } while (!done);
1229 return IRQ_HANDLED;
1230}
1231
1232#endif
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242static void collect_stats(struct NCR5380_hostdata *hostdata, Scsi_Cmnd * cmd)
1243{
1244#ifdef NCR5380_STATS
1245 switch (cmd->cmnd[0]) {
1246 case WRITE:
1247 case WRITE_6:
1248 case WRITE_10:
1249 hostdata->time_write[scmd_id(cmd)] += (jiffies - hostdata->timebase);
1250 hostdata->pendingw--;
1251 break;
1252 case READ:
1253 case READ_6:
1254 case READ_10:
1255 hostdata->time_read[scmd_id(cmd)] += (jiffies - hostdata->timebase);
1256 hostdata->pendingr--;
1257 break;
1258 }
1259#endif
1260}
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296static int NCR5380_select(struct Scsi_Host *instance, Scsi_Cmnd * cmd, int tag)
1297{
1298 NCR5380_local_declare();
1299 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
1300 unsigned char tmp[3], phase;
1301 unsigned char *data;
1302 int len;
1303 unsigned long timeout;
1304 unsigned char value;
1305 int err;
1306 NCR5380_setup(instance);
1307
1308 if (hostdata->selecting)
1309 goto part2;
1310
1311 hostdata->restart_select = 0;
1312
1313 NCR5380_dprint(NDEBUG_ARBITRATION, instance);
1314 dprintk(NDEBUG_ARBITRATION, ("scsi%d : starting arbitration, id = %d\n", instance->host_no, instance->this_id));
1315
1316
1317
1318
1319
1320
1321 NCR5380_write(TARGET_COMMAND_REG, 0);
1322
1323
1324
1325
1326
1327 NCR5380_write(OUTPUT_DATA_REG, hostdata->id_mask);
1328 NCR5380_write(MODE_REG, MR_ARBITRATE);
1329
1330
1331
1332
1333 spin_unlock_irq(instance->host_lock);
1334 err = NCR5380_poll_politely(instance, INITIATOR_COMMAND_REG, ICR_ARBITRATION_PROGRESS, ICR_ARBITRATION_PROGRESS, 5*HZ);
1335 spin_lock_irq(instance->host_lock);
1336 if (err < 0) {
1337 printk(KERN_DEBUG "scsi: arbitration timeout at %d\n", __LINE__);
1338 NCR5380_write(MODE_REG, MR_BASE);
1339 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1340 goto failed;
1341 }
1342
1343 dprintk(NDEBUG_ARBITRATION, ("scsi%d : arbitration complete\n", instance->host_no));
1344
1345
1346
1347
1348
1349
1350
1351
1352 udelay(3);
1353
1354
1355 if ((NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST) || (NCR5380_read(CURRENT_SCSI_DATA_REG) & hostdata->id_higher_mask) || (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
1356 NCR5380_write(MODE_REG, MR_BASE);
1357 dprintk(NDEBUG_ARBITRATION, ("scsi%d : lost arbitration, deasserting MR_ARBITRATE\n", instance->host_no));
1358 goto failed;
1359 }
1360 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_SEL);
1361
1362 if (!(hostdata->flags & FLAG_DTC3181E) &&
1363
1364
1365
1366
1367 (NCR5380_read(INITIATOR_COMMAND_REG) & ICR_ARBITRATION_LOST)) {
1368 NCR5380_write(MODE_REG, MR_BASE);
1369 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1370 dprintk(NDEBUG_ARBITRATION, ("scsi%d : lost arbitration, deasserting ICR_ASSERT_SEL\n", instance->host_no));
1371 goto failed;
1372 }
1373
1374
1375
1376
1377
1378 udelay(2);
1379
1380 dprintk(NDEBUG_ARBITRATION, ("scsi%d : won arbitration\n", instance->host_no));
1381
1382
1383
1384
1385
1386
1387 NCR5380_write(OUTPUT_DATA_REG, (hostdata->id_mask | (1 << scmd_id(cmd))));
1388
1389
1390
1391
1392
1393
1394
1395 NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_BSY | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
1396 NCR5380_write(MODE_REG, MR_BASE);
1397
1398
1399
1400
1401
1402 NCR5380_write(SELECT_ENABLE_REG, 0);
1403
1404
1405
1406
1407
1408 udelay(1);
1409
1410
1411 NCR5380_write(INITIATOR_COMMAND_REG, (ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_SEL));
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430 udelay(1);
1431
1432 dprintk(NDEBUG_SELECTION, ("scsi%d : selecting target %d\n", instance->host_no, scmd_id(cmd)));
1433
1434
1435
1436
1437
1438
1439 timeout = jiffies + (250 * HZ / 1000);
1440
1441
1442
1443
1444
1445
1446
1447 hostdata->select_time = 0;
1448 hostdata->selecting = cmd;
1449
1450part2:
1451
1452
1453
1454 value = NCR5380_read(STATUS_REG) & (SR_BSY | SR_IO);
1455
1456 if (!value && (hostdata->select_time < HZ/4)) {
1457
1458 hostdata->select_time++;
1459 NCR5380_set_timer(hostdata, 1);
1460 return 0;
1461
1462 }
1463
1464 hostdata->selecting = NULL;
1465
1466 if ((NCR5380_read(STATUS_REG) & (SR_SEL | SR_IO)) == (SR_SEL | SR_IO)) {
1467 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1468 NCR5380_reselect(instance);
1469 printk("scsi%d : reselection after won arbitration?\n", instance->host_no);
1470 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1471 return -1;
1472 }
1473
1474
1475
1476
1477
1478
1479 udelay(1);
1480
1481 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
1482
1483 if (!(NCR5380_read(STATUS_REG) & SR_BSY)) {
1484 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1485 if (hostdata->targets_present & (1 << scmd_id(cmd))) {
1486 printk(KERN_DEBUG "scsi%d : weirdness\n", instance->host_no);
1487 if (hostdata->restart_select)
1488 printk(KERN_DEBUG "\trestart select\n");
1489 NCR5380_dprint(NDEBUG_SELECTION, instance);
1490 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1491 return -1;
1492 }
1493 cmd->result = DID_BAD_TARGET << 16;
1494 collect_stats(hostdata, cmd);
1495 cmd->scsi_done(cmd);
1496 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1497 dprintk(NDEBUG_SELECTION, ("scsi%d : target did not respond within 250ms\n", instance->host_no));
1498 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1499 return 0;
1500 }
1501 hostdata->targets_present |= (1 << scmd_id(cmd));
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520 spin_unlock_irq(instance->host_lock);
1521 err = NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, HZ);
1522 spin_lock_irq(instance->host_lock);
1523
1524 if(err) {
1525 printk(KERN_ERR "scsi%d: timeout at NCR5380.c:%d\n", instance->host_no, __LINE__);
1526 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
1527 goto failed;
1528 }
1529
1530 dprintk(NDEBUG_SELECTION, ("scsi%d : target %d selected, going into MESSAGE OUT phase.\n", instance->host_no, cmd->device->id));
1531 tmp[0] = IDENTIFY(((instance->irq == SCSI_IRQ_NONE) ? 0 : 1), cmd->device->lun);
1532
1533 len = 1;
1534 cmd->tag = 0;
1535
1536
1537 data = tmp;
1538 phase = PHASE_MSGOUT;
1539 NCR5380_transfer_pio(instance, &phase, &len, &data);
1540 dprintk(NDEBUG_SELECTION, ("scsi%d : nexus established.\n", instance->host_no));
1541
1542 hostdata->connected = cmd;
1543 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
1544
1545 initialize_SCp(cmd);
1546
1547 return 0;
1548
1549
1550failed:
1551 return -1;
1552
1553}
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580static int NCR5380_transfer_pio(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
1581 NCR5380_local_declare();
1582 unsigned char p = *phase, tmp;
1583 int c = *count;
1584 unsigned char *d = *data;
1585
1586
1587
1588 int break_allowed = 0;
1589 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
1590 NCR5380_setup(instance);
1591
1592 if (!(p & SR_IO))
1593 dprintk(NDEBUG_PIO, ("scsi%d : pio write %d bytes\n", instance->host_no, c));
1594 else
1595 dprintk(NDEBUG_PIO, ("scsi%d : pio read %d bytes\n", instance->host_no, c));
1596
1597
1598
1599
1600
1601
1602
1603 NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
1604
1605
1606
1607
1608 if ((p == PHASE_DATAIN) || (p == PHASE_DATAOUT)) {
1609 break_allowed = 1;
1610 }
1611 do {
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623 while (!((tmp = NCR5380_read(STATUS_REG)) & SR_REQ) && !break_allowed);
1624 if (!(tmp & SR_REQ)) {
1625
1626 NCR5380_set_timer(hostdata, USLEEP_SLEEP);
1627 break;
1628 }
1629
1630 dprintk(NDEBUG_HANDSHAKE, ("scsi%d : REQ detected\n", instance->host_no));
1631
1632
1633 if ((tmp & PHASE_MASK) != p) {
1634 dprintk(NDEBUG_HANDSHAKE, ("scsi%d : phase mismatch\n", instance->host_no));
1635 NCR5380_dprint_phase(NDEBUG_HANDSHAKE, instance);
1636 break;
1637 }
1638
1639 if (!(p & SR_IO))
1640 NCR5380_write(OUTPUT_DATA_REG, *d);
1641 else
1642 *d = NCR5380_read(CURRENT_SCSI_DATA_REG);
1643
1644 ++d;
1645
1646
1647
1648
1649
1650
1651
1652
1653 if (!(p & SR_IO)) {
1654 if (!((p & SR_MSG) && c > 1)) {
1655 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA);
1656 NCR5380_dprint(NDEBUG_PIO, instance);
1657 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ACK);
1658 } else {
1659 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN);
1660 NCR5380_dprint(NDEBUG_PIO, instance);
1661 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
1662 }
1663 } else {
1664 NCR5380_dprint(NDEBUG_PIO, instance);
1665 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ACK);
1666 }
1667
1668
1669 NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, 0, 5*HZ);
1670 dprintk(NDEBUG_HANDSHAKE, ("scsi%d : req false, handshake complete\n", instance->host_no));
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683 if (!(p == PHASE_MSGIN && c == 1)) {
1684 if (p == PHASE_MSGOUT && c > 1)
1685 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
1686 else
1687 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1688 }
1689 } while (--c);
1690
1691 dprintk(NDEBUG_PIO, ("scsi%d : residual %d\n", instance->host_no, c));
1692
1693 *count = c;
1694 *data = d;
1695 tmp = NCR5380_read(STATUS_REG);
1696 if (tmp & SR_REQ)
1697 *phase = tmp & PHASE_MASK;
1698 else
1699 *phase = PHASE_UNKNOWN;
1700
1701 if (!c || (*phase == p))
1702 return 0;
1703 else
1704 return -1;
1705}
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717static void do_reset(struct Scsi_Host *host) {
1718 NCR5380_local_declare();
1719 NCR5380_setup(host);
1720
1721 NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(NCR5380_read(STATUS_REG) & PHASE_MASK));
1722 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_RST);
1723 udelay(25);
1724 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1725}
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739static int do_abort(struct Scsi_Host *host) {
1740 NCR5380_local_declare();
1741 unsigned char *msgptr, phase, tmp;
1742 int len;
1743 int rc;
1744 NCR5380_setup(host);
1745
1746
1747
1748 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760 rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, SR_REQ, 60 * HZ);
1761
1762 if(rc < 0)
1763 return -1;
1764
1765 tmp = (unsigned char)rc;
1766
1767 NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
1768
1769 if ((tmp & PHASE_MASK) != PHASE_MSGOUT) {
1770 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
1771 rc = NCR5380_poll_politely(host, STATUS_REG, SR_REQ, 0, 3*HZ);
1772 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
1773 if(rc == -1)
1774 return -1;
1775 }
1776 tmp = ABORT;
1777 msgptr = &tmp;
1778 len = 1;
1779 phase = PHASE_MSGOUT;
1780 NCR5380_transfer_pio(host, &phase, &len, &msgptr);
1781
1782
1783
1784
1785
1786
1787 return len ? -1 : 0;
1788}
1789
1790#if defined(REAL_DMA) || defined(PSEUDO_DMA) || defined (REAL_DMA_POLL)
1791
1792
1793
1794
1795
1796
1797
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1799
1800
1801
1802
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1811
1812static int NCR5380_transfer_dma(struct Scsi_Host *instance, unsigned char *phase, int *count, unsigned char **data) {
1813 NCR5380_local_declare();
1814 register int c = *count;
1815 register unsigned char p = *phase;
1816 register unsigned char *d = *data;
1817 unsigned char tmp;
1818 int foo;
1819#if defined(REAL_DMA_POLL)
1820 int cnt, toPIO;
1821 unsigned char saved_data = 0, overrun = 0, residue;
1822#endif
1823
1824 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
1825
1826 NCR5380_setup(instance);
1827
1828 if ((tmp = (NCR5380_read(STATUS_REG) & PHASE_MASK)) != p) {
1829 *phase = tmp;
1830 return -1;
1831 }
1832#if defined(REAL_DMA) || defined(REAL_DMA_POLL)
1833#ifdef READ_OVERRUNS
1834 if (p & SR_IO) {
1835 c -= 2;
1836 }
1837#endif
1838 dprintk(NDEBUG_DMA, ("scsi%d : initializing DMA channel %d for %s, %d bytes %s %0x\n", instance->host_no, instance->dma_channel, (p & SR_IO) ? "reading" : "writing", c, (p & SR_IO) ? "to" : "from", (unsigned) d));
1839 hostdata->dma_len = (p & SR_IO) ? NCR5380_dma_read_setup(instance, d, c) : NCR5380_dma_write_setup(instance, d, c);
1840#endif
1841
1842 NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(p));
1843
1844#ifdef REAL_DMA
1845 NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_EOP_INTR | MR_MONITOR_BSY);
1846#elif defined(REAL_DMA_POLL)
1847 NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
1848#else
1849
1850
1851
1852
1853
1854
1855#if defined(PSEUDO_DMA) && defined(UNSAFE)
1856 spin_unlock_irq(instance->host_lock);
1857#endif
1858
1859 if (hostdata->flags & FLAG_NCR53C400)
1860 NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE | MR_ENABLE_PAR_CHECK | MR_ENABLE_PAR_INTR | MR_ENABLE_EOP_INTR | MR_DMA_MODE | MR_MONITOR_BSY);
1861 else
1862 NCR5380_write(MODE_REG, MR_BASE | MR_DMA_MODE);
1863#endif
1864
1865 dprintk(NDEBUG_DMA, ("scsi%d : mode reg = 0x%X\n", instance->host_no, NCR5380_read(MODE_REG)));
1866
1867
1868
1869
1870
1871
1872 if (p & SR_IO) {
1873 io_recovery_delay(1);
1874 NCR5380_write(START_DMA_INITIATOR_RECEIVE_REG, 0);
1875 } else {
1876 io_recovery_delay(1);
1877 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_DATA);
1878 io_recovery_delay(1);
1879 NCR5380_write(START_DMA_SEND_REG, 0);
1880 io_recovery_delay(1);
1881 }
1882
1883#if defined(REAL_DMA_POLL)
1884 do {
1885 tmp = NCR5380_read(BUS_AND_STATUS_REG);
1886 } while ((tmp & BASR_PHASE_MATCH) && !(tmp & (BASR_BUSY_ERROR | BASR_END_DMA_TRANSFER)));
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924 if (p & SR_IO) {
1925#ifdef READ_OVERRUNS
1926 udelay(10);
1927 if (((NCR5380_read(BUS_AND_STATUS_REG) & (BASR_PHASE_MATCH | BASR_ACK)) == (BASR_PHASE_MATCH | BASR_ACK))) {
1928 saved_data = NCR5380_read(INPUT_DATA_REGISTER);
1929 overrun = 1;
1930 }
1931#endif
1932 } else {
1933 int limit = 100;
1934 while (((tmp = NCR5380_read(BUS_AND_STATUS_REG)) & BASR_ACK) || (NCR5380_read(STATUS_REG) & SR_REQ)) {
1935 if (!(tmp & BASR_PHASE_MATCH))
1936 break;
1937 if (--limit < 0)
1938 break;
1939 }
1940 }
1941
1942 dprintk(NDEBUG_DMA, ("scsi%d : polled DMA transfer complete, basr 0x%X, sr 0x%X\n", instance->host_no, tmp, NCR5380_read(STATUS_REG)));
1943
1944 NCR5380_write(MODE_REG, MR_BASE);
1945 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
1946
1947 residue = NCR5380_dma_residual(instance);
1948 c -= residue;
1949 *count -= c;
1950 *data += c;
1951 *phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
1952
1953#ifdef READ_OVERRUNS
1954 if (*phase == p && (p & SR_IO) && residue == 0) {
1955 if (overrun) {
1956 dprintk(NDEBUG_DMA, ("Got an input overrun, using saved byte\n"));
1957 **data = saved_data;
1958 *data += 1;
1959 *count -= 1;
1960 cnt = toPIO = 1;
1961 } else {
1962 printk("No overrun??\n");
1963 cnt = toPIO = 2;
1964 }
1965 dprintk(NDEBUG_DMA, ("Doing %d-byte PIO to 0x%X\n", cnt, *data));
1966 NCR5380_transfer_pio(instance, phase, &cnt, data);
1967 *count -= toPIO - cnt;
1968 }
1969#endif
1970
1971 dprintk(NDEBUG_DMA, ("Return with data ptr = 0x%X, count %d, last 0x%X, next 0x%X\n", *data, *count, *(*data + *count - 1), *(*data + *count)));
1972 return 0;
1973
1974#elif defined(REAL_DMA)
1975 return 0;
1976#else
1977 if (p & SR_IO) {
1978#ifdef DMA_WORKS_RIGHT
1979 foo = NCR5380_pread(instance, d, c);
1980#else
1981 int diff = 1;
1982 if (hostdata->flags & FLAG_NCR53C400) {
1983 diff = 0;
1984 }
1985 if (!(foo = NCR5380_pread(instance, d, c - diff))) {
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008 if (!(hostdata->flags & FLAG_NCR53C400)) {
2009 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ));
2010
2011 while (NCR5380_read(STATUS_REG) & SR_REQ);
2012 d[c - 1] = NCR5380_read(INPUT_DATA_REG);
2013 }
2014 }
2015#endif
2016 } else {
2017#ifdef DMA_WORKS_RIGHT
2018 foo = NCR5380_pwrite(instance, d, c);
2019#else
2020 int timeout;
2021 dprintk(NDEBUG_C400_PWRITE, ("About to pwrite %d bytes\n", c));
2022 if (!(foo = NCR5380_pwrite(instance, d, c))) {
2023
2024
2025
2026
2027 if (!(hostdata->flags & FLAG_HAS_LAST_BYTE_SENT)) {
2028 timeout = 20000;
2029 while (!(NCR5380_read(BUS_AND_STATUS_REG) & BASR_DRQ) && (NCR5380_read(BUS_AND_STATUS_REG) & BASR_PHASE_MATCH));
2030
2031 if (!timeout)
2032 dprintk(NDEBUG_LAST_BYTE_SENT, ("scsi%d : timed out on last byte\n", instance->host_no));
2033
2034 if (hostdata->flags & FLAG_CHECK_LAST_BYTE_SENT) {
2035 hostdata->flags &= ~FLAG_CHECK_LAST_BYTE_SENT;
2036 if (NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT) {
2037 hostdata->flags |= FLAG_HAS_LAST_BYTE_SENT;
2038 dprintk(NDEBUG_LAST_WRITE_SENT, ("scsi%d : last bit sent works\n", instance->host_no));
2039 }
2040 }
2041 } else {
2042 dprintk(NDEBUG_C400_PWRITE, ("Waiting for LASTBYTE\n"));
2043 while (!(NCR5380_read(TARGET_COMMAND_REG) & TCR_LAST_BYTE_SENT));
2044 dprintk(NDEBUG_C400_PWRITE, ("Got LASTBYTE\n"));
2045 }
2046 }
2047#endif
2048 }
2049 NCR5380_write(MODE_REG, MR_BASE);
2050 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2051
2052 if ((!(p & SR_IO)) && (hostdata->flags & FLAG_NCR53C400)) {
2053 dprintk(NDEBUG_C400_PWRITE, ("53C400w: Checking for IRQ\n"));
2054 if (NCR5380_read(BUS_AND_STATUS_REG) & BASR_IRQ) {
2055 dprintk(NDEBUG_C400_PWRITE, ("53C400w: got it, reading reset interrupt reg\n"));
2056 NCR5380_read(RESET_PARITY_INTERRUPT_REG);
2057 } else {
2058 printk("53C400w: IRQ NOT THERE!\n");
2059 }
2060 }
2061 *data = d + c;
2062 *count = 0;
2063 *phase = NCR5380_read(STATUS_REG) & PHASE_MASK;
2064#if defined(PSEUDO_DMA) && defined(UNSAFE)
2065 spin_lock_irq(instance->host_lock);
2066#endif
2067 return foo;
2068#endif
2069}
2070#endif
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091static void NCR5380_information_transfer(struct Scsi_Host *instance) {
2092 NCR5380_local_declare();
2093 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *)instance->hostdata;
2094 unsigned char msgout = NOP;
2095 int sink = 0;
2096 int len;
2097#if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL)
2098 int transfersize;
2099#endif
2100 unsigned char *data;
2101 unsigned char phase, tmp, extended_msg[10], old_phase = 0xff;
2102 Scsi_Cmnd *cmd = (Scsi_Cmnd *) hostdata->connected;
2103
2104 unsigned long poll_time = jiffies + USLEEP_POLL;
2105
2106 NCR5380_setup(instance);
2107
2108 while (1) {
2109 tmp = NCR5380_read(STATUS_REG);
2110
2111 if (tmp & SR_REQ) {
2112 phase = (tmp & PHASE_MASK);
2113 if (phase != old_phase) {
2114 old_phase = phase;
2115 NCR5380_dprint_phase(NDEBUG_INFORMATION, instance);
2116 }
2117 if (sink && (phase != PHASE_MSGOUT)) {
2118 NCR5380_write(TARGET_COMMAND_REG, PHASE_SR_TO_TCR(tmp));
2119
2120 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN | ICR_ASSERT_ACK);
2121 while (NCR5380_read(STATUS_REG) & SR_REQ);
2122 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
2123 sink = 0;
2124 continue;
2125 }
2126 switch (phase) {
2127 case PHASE_DATAIN:
2128 case PHASE_DATAOUT:
2129#if (NDEBUG & NDEBUG_NO_DATAOUT)
2130 printk("scsi%d : NDEBUG_NO_DATAOUT set, attempted DATAOUT aborted\n", instance->host_no);
2131 sink = 1;
2132 do_abort(instance);
2133 cmd->result = DID_ERROR << 16;
2134 cmd->scsi_done(cmd);
2135 return;
2136#endif
2137
2138
2139
2140
2141
2142 if (!cmd->SCp.this_residual && cmd->SCp.buffers_residual) {
2143 ++cmd->SCp.buffer;
2144 --cmd->SCp.buffers_residual;
2145 cmd->SCp.this_residual = cmd->SCp.buffer->length;
2146 cmd->SCp.ptr = sg_virt(cmd->SCp.buffer);
2147 dprintk(NDEBUG_INFORMATION, ("scsi%d : %d bytes and %d buffers left\n", instance->host_no, cmd->SCp.this_residual, cmd->SCp.buffers_residual));
2148 }
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159#if defined(PSEUDO_DMA) || defined(REAL_DMA_POLL)
2160
2161
2162
2163
2164
2165
2166
2167#ifdef NCR5380_dma_xfer_len
2168 if (!cmd->device->borken && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && (transfersize = NCR5380_dma_xfer_len(instance, cmd)) != 0) {
2169#else
2170 transfersize = cmd->transfersize;
2171
2172#ifdef LIMIT_TRANSFERSIZE
2173 if (transfersize > 512)
2174 transfersize = 512;
2175#endif
2176
2177 if (!cmd->device->borken && transfersize && !(hostdata->flags & FLAG_NO_PSEUDO_DMA) && cmd->SCp.this_residual && !(cmd->SCp.this_residual % transfersize)) {
2178
2179
2180 if (transfersize > 32 * 1024)
2181 transfersize = 32 * 1024;
2182#endif
2183 len = transfersize;
2184 if (NCR5380_transfer_dma(instance, &phase, &len, (unsigned char **) &cmd->SCp.ptr)) {
2185
2186
2187
2188
2189 scmd_printk(KERN_INFO, cmd,
2190 "switching to slow handshake\n");
2191 cmd->device->borken = 1;
2192 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
2193 sink = 1;
2194 do_abort(instance);
2195 cmd->result = DID_ERROR << 16;
2196 cmd->scsi_done(cmd);
2197
2198 } else
2199 cmd->SCp.this_residual -= transfersize - len;
2200 } else
2201#endif
2202 NCR5380_transfer_pio(instance, &phase, (int *) &cmd->SCp.this_residual, (unsigned char **)
2203 &cmd->SCp.ptr);
2204 break;
2205 case PHASE_MSGIN:
2206 len = 1;
2207 data = &tmp;
2208 NCR5380_transfer_pio(instance, &phase, &len, &data);
2209 cmd->SCp.Message = tmp;
2210
2211 switch (tmp) {
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222#ifdef LINKED
2223 case LINKED_CMD_COMPLETE:
2224 case LINKED_FLG_CMD_COMPLETE:
2225
2226 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2227 dprintk(NDEBUG_LINKED, ("scsi%d : target %d lun %d linked command complete.\n", instance->host_no, cmd->device->id, cmd->device->lun));
2228
2229
2230
2231
2232
2233 if (!cmd->next_link) {
2234 printk("scsi%d : target %d lun %d linked command complete, no next_link\n" instance->host_no, cmd->device->id, cmd->device->lun);
2235 sink = 1;
2236 do_abort(instance);
2237 return;
2238 }
2239 initialize_SCp(cmd->next_link);
2240
2241 cmd->next_link->tag = cmd->tag;
2242 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
2243 dprintk(NDEBUG_LINKED, ("scsi%d : target %d lun %d linked request done, calling scsi_done().\n", instance->host_no, cmd->device->id, cmd->device->lun));
2244 collect_stats(hostdata, cmd);
2245 cmd->scsi_done(cmd);
2246 cmd = hostdata->connected;
2247 break;
2248#endif
2249 case ABORT:
2250 case COMMAND_COMPLETE:
2251
2252 sink = 1;
2253 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2254 hostdata->connected = NULL;
2255 dprintk(NDEBUG_QUEUES, ("scsi%d : command for target %d, lun %d completed\n", instance->host_no, cmd->device->id, cmd->device->lun));
2256 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274 if (cmd->cmnd[0] != REQUEST_SENSE)
2275 cmd->result = cmd->SCp.Status | (cmd->SCp.Message << 8);
2276 else if (status_byte(cmd->SCp.Status) != GOOD)
2277 cmd->result = (cmd->result & 0x00ffff) | (DID_ERROR << 16);
2278
2279#ifdef AUTOSENSE
2280 if ((cmd->cmnd[0] == REQUEST_SENSE) &&
2281 hostdata->ses.cmd_len) {
2282 scsi_eh_restore_cmnd(cmd, &hostdata->ses);
2283 hostdata->ses.cmd_len = 0 ;
2284 }
2285
2286 if ((cmd->cmnd[0] != REQUEST_SENSE) && (status_byte(cmd->SCp.Status) == CHECK_CONDITION)) {
2287 scsi_eh_prep_cmnd(cmd, &hostdata->ses, NULL, 0, ~0);
2288
2289 dprintk(NDEBUG_AUTOSENSE, ("scsi%d : performing request sense\n", instance->host_no));
2290
2291 LIST(cmd, hostdata->issue_queue);
2292 cmd->host_scribble = (unsigned char *)
2293 hostdata->issue_queue;
2294 hostdata->issue_queue = (Scsi_Cmnd *) cmd;
2295 dprintk(NDEBUG_QUEUES, ("scsi%d : REQUEST SENSE added to head of issue queue\n", instance->host_no));
2296 } else
2297#endif
2298 {
2299 collect_stats(hostdata, cmd);
2300 cmd->scsi_done(cmd);
2301 }
2302
2303 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
2304
2305
2306
2307
2308 NCR5380_write(TARGET_COMMAND_REG, 0);
2309
2310 while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
2311 barrier();
2312 return;
2313 case MESSAGE_REJECT:
2314
2315 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2316 switch (hostdata->last_message) {
2317 case HEAD_OF_QUEUE_TAG:
2318 case ORDERED_QUEUE_TAG:
2319 case SIMPLE_QUEUE_TAG:
2320 cmd->device->simple_tags = 0;
2321 hostdata->busy[cmd->device->id] |= (1 << cmd->device->lun);
2322 break;
2323 default:
2324 break;
2325 }
2326 case DISCONNECT:{
2327
2328 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2329 cmd->device->disconnect = 1;
2330 LIST(cmd, hostdata->disconnected_queue);
2331 cmd->host_scribble = (unsigned char *)
2332 hostdata->disconnected_queue;
2333 hostdata->connected = NULL;
2334 hostdata->disconnected_queue = cmd;
2335 dprintk(NDEBUG_QUEUES, ("scsi%d : command for target %d lun %d was moved from connected to" " the disconnected_queue\n", instance->host_no, cmd->device->id, cmd->device->lun));
2336
2337
2338
2339
2340 NCR5380_write(TARGET_COMMAND_REG, 0);
2341
2342
2343 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
2344
2345
2346 while ((NCR5380_read(STATUS_REG) & SR_BSY) && !hostdata->connected)
2347 barrier();
2348 return;
2349 }
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360 case SAVE_POINTERS:
2361 case RESTORE_POINTERS:
2362
2363 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2364 break;
2365 case EXTENDED_MESSAGE:
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378 extended_msg[0] = EXTENDED_MESSAGE;
2379
2380 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2381 dprintk(NDEBUG_EXTENDED, ("scsi%d : receiving extended message\n", instance->host_no));
2382
2383 len = 2;
2384 data = extended_msg + 1;
2385 phase = PHASE_MSGIN;
2386 NCR5380_transfer_pio(instance, &phase, &len, &data);
2387
2388 dprintk(NDEBUG_EXTENDED, ("scsi%d : length=%d, code=0x%02x\n", instance->host_no, (int) extended_msg[1], (int) extended_msg[2]));
2389
2390 if (!len && extended_msg[1] <= (sizeof(extended_msg) - 1)) {
2391
2392 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2393 len = extended_msg[1] - 1;
2394 data = extended_msg + 3;
2395 phase = PHASE_MSGIN;
2396
2397 NCR5380_transfer_pio(instance, &phase, &len, &data);
2398 dprintk(NDEBUG_EXTENDED, ("scsi%d : message received, residual %d\n", instance->host_no, len));
2399
2400 switch (extended_msg[2]) {
2401 case EXTENDED_SDTR:
2402 case EXTENDED_WDTR:
2403 case EXTENDED_MODIFY_DATA_POINTER:
2404 case EXTENDED_EXTENDED_IDENTIFY:
2405 tmp = 0;
2406 }
2407 } else if (len) {
2408 printk("scsi%d: error receiving extended message\n", instance->host_no);
2409 tmp = 0;
2410 } else {
2411 printk("scsi%d: extended message code %02x length %d is too long\n", instance->host_no, extended_msg[2], extended_msg[1]);
2412 tmp = 0;
2413 }
2414
2415
2416
2417
2418
2419
2420 default:
2421 if (!tmp) {
2422 printk("scsi%d: rejecting message ", instance->host_no);
2423 spi_print_msg(extended_msg);
2424 printk("\n");
2425 } else if (tmp != EXTENDED_MESSAGE)
2426 scmd_printk(KERN_INFO, cmd,
2427 "rejecting unknown message %02x\n",tmp);
2428 else
2429 scmd_printk(KERN_INFO, cmd,
2430 "rejecting unknown extended message code %02x, length %d\n", extended_msg[1], extended_msg[0]);
2431
2432 msgout = MESSAGE_REJECT;
2433 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_ATN);
2434 break;
2435 }
2436 break;
2437 case PHASE_MSGOUT:
2438 len = 1;
2439 data = &msgout;
2440 hostdata->last_message = msgout;
2441 NCR5380_transfer_pio(instance, &phase, &len, &data);
2442 if (msgout == ABORT) {
2443 hostdata->busy[cmd->device->id] &= ~(1 << cmd->device->lun);
2444 hostdata->connected = NULL;
2445 cmd->result = DID_ERROR << 16;
2446 collect_stats(hostdata, cmd);
2447 cmd->scsi_done(cmd);
2448 NCR5380_write(SELECT_ENABLE_REG, hostdata->id_mask);
2449 return;
2450 }
2451 msgout = NOP;
2452 break;
2453 case PHASE_CMDOUT:
2454 len = cmd->cmd_len;
2455 data = cmd->cmnd;
2456
2457
2458
2459
2460
2461 NCR5380_transfer_pio(instance, &phase, &len, &data);
2462 if (!cmd->device->disconnect && should_disconnect(cmd->cmnd[0])) {
2463 NCR5380_set_timer(hostdata, USLEEP_SLEEP);
2464 dprintk(NDEBUG_USLEEP, ("scsi%d : issued command, sleeping until %ul\n", instance->host_no, hostdata->time_expires));
2465 return;
2466 }
2467 break;
2468 case PHASE_STATIN:
2469 len = 1;
2470 data = &tmp;
2471 NCR5380_transfer_pio(instance, &phase, &len, &data);
2472 cmd->SCp.Status = tmp;
2473 break;
2474 default:
2475 printk("scsi%d : unknown phase\n", instance->host_no);
2476 NCR5380_dprint(NDEBUG_ALL, instance);
2477 }
2478 }
2479 else {
2480
2481
2482 if (!cmd->device->disconnect && time_after_eq(jiffies, poll_time)) {
2483 NCR5380_set_timer(hostdata, USLEEP_SLEEP);
2484 dprintk(NDEBUG_USLEEP, ("scsi%d : poll timed out, sleeping until %ul\n", instance->host_no, hostdata->time_expires));
2485 return;
2486 }
2487 }
2488 }
2489}
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503static void NCR5380_reselect(struct Scsi_Host *instance) {
2504 NCR5380_local_declare();
2505 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *)
2506 instance->hostdata;
2507 unsigned char target_mask;
2508 unsigned char lun, phase;
2509 int len;
2510 unsigned char msg[3];
2511 unsigned char *data;
2512 Scsi_Cmnd *tmp = NULL, *prev;
2513 int abort = 0;
2514 NCR5380_setup(instance);
2515
2516
2517
2518
2519
2520
2521 NCR5380_write(MODE_REG, MR_BASE);
2522 hostdata->restart_select = 1;
2523
2524 target_mask = NCR5380_read(CURRENT_SCSI_DATA_REG) & ~(hostdata->id_mask);
2525 dprintk(NDEBUG_SELECTION, ("scsi%d : reselect\n", instance->host_no));
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE | ICR_ASSERT_BSY);
2537
2538
2539 if(NCR5380_poll_politely(instance, STATUS_REG, SR_SEL, 0, 2*HZ)<0)
2540 abort = 1;
2541
2542 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2543
2544
2545
2546
2547
2548
2549 if(NCR5380_poll_politely(instance, STATUS_REG, SR_REQ, SR_REQ, 2*HZ))
2550 abort = 1;
2551
2552 len = 1;
2553 data = msg;
2554 phase = PHASE_MSGIN;
2555 NCR5380_transfer_pio(instance, &phase, &len, &data);
2556
2557 if (!(msg[0] & 0x80)) {
2558 printk(KERN_ERR "scsi%d : expecting IDENTIFY message, got ", instance->host_no);
2559 spi_print_msg(msg);
2560 abort = 1;
2561 } else {
2562
2563 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2564 lun = (msg[0] & 0x07);
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578 for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue, prev = NULL; tmp; prev = tmp, tmp = (Scsi_Cmnd *) tmp->host_scribble)
2579 if ((target_mask == (1 << tmp->device->id)) && (lun == tmp->device->lun)
2580 ) {
2581 if (prev) {
2582 REMOVE(prev, prev->host_scribble, tmp, tmp->host_scribble);
2583 prev->host_scribble = tmp->host_scribble;
2584 } else {
2585 REMOVE(-1, hostdata->disconnected_queue, tmp, tmp->host_scribble);
2586 hostdata->disconnected_queue = (Scsi_Cmnd *) tmp->host_scribble;
2587 }
2588 tmp->host_scribble = NULL;
2589 break;
2590 }
2591 if (!tmp) {
2592 printk(KERN_ERR "scsi%d : warning : target bitmask %02x lun %d not in disconnect_queue.\n", instance->host_no, target_mask, lun);
2593
2594
2595
2596
2597 abort = 1;
2598 }
2599 }
2600
2601 if (abort) {
2602 do_abort(instance);
2603 } else {
2604 hostdata->connected = tmp;
2605 dprintk(NDEBUG_RESELECTION, ("scsi%d : nexus established, target = %d, lun = %d, tag = %d\n", instance->host_no, tmp->target, tmp->lun, tmp->tag));
2606 }
2607}
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621#ifdef REAL_DMA
2622static void NCR5380_dma_complete(NCR5380_instance * instance) {
2623 NCR5380_local_declare();
2624 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
2625 int transferred;
2626 NCR5380_setup(instance);
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639 NCR5380_poll_politely(instance, BUS_AND_STATUS_REG, BASR_ACK, 0, 5*HZ);
2640
2641 NCR5380_write(MODE_REG, MR_BASE);
2642 NCR5380_write(INITIATOR_COMMAND_REG, ICR_BASE);
2643
2644
2645
2646
2647
2648
2649
2650 if (!(hostdata->connected->SCp.phase & SR_CD)) {
2651 transferred = instance->dmalen - NCR5380_dma_residual();
2652 hostdata->connected->SCp.this_residual -= transferred;
2653 hostdata->connected->SCp.ptr += transferred;
2654 }
2655}
2656#endif
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677static int NCR5380_abort(Scsi_Cmnd * cmd) {
2678 NCR5380_local_declare();
2679 struct Scsi_Host *instance = cmd->device->host;
2680 struct NCR5380_hostdata *hostdata = (struct NCR5380_hostdata *) instance->hostdata;
2681 Scsi_Cmnd *tmp, **prev;
2682
2683 printk(KERN_WARNING "scsi%d : aborting command\n", instance->host_no);
2684 scsi_print_command(cmd);
2685
2686 NCR5380_print_status(instance);
2687
2688 NCR5380_setup(instance);
2689
2690 dprintk(NDEBUG_ABORT, ("scsi%d : abort called\n", instance->host_no));
2691 dprintk(NDEBUG_ABORT, (" basr 0x%X, sr 0x%X\n", NCR5380_read(BUS_AND_STATUS_REG), NCR5380_read(STATUS_REG)));
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729 dprintk(NDEBUG_ABORT, ("scsi%d : abort going into loop.\n", instance->host_no));
2730 for (prev = (Scsi_Cmnd **) & (hostdata->issue_queue), tmp = (Scsi_Cmnd *) hostdata->issue_queue; tmp; prev = (Scsi_Cmnd **) & (tmp->host_scribble), tmp = (Scsi_Cmnd *) tmp->host_scribble)
2731 if (cmd == tmp) {
2732 REMOVE(5, *prev, tmp, tmp->host_scribble);
2733 (*prev) = (Scsi_Cmnd *) tmp->host_scribble;
2734 tmp->host_scribble = NULL;
2735 tmp->result = DID_ABORT << 16;
2736 dprintk(NDEBUG_ABORT, ("scsi%d : abort removed command from issue queue.\n", instance->host_no));
2737 tmp->scsi_done(tmp);
2738 return SUCCESS;
2739 }
2740#if (NDEBUG & NDEBUG_ABORT)
2741
2742 else if (prev == tmp)
2743 printk(KERN_ERR "scsi%d : LOOP\n", instance->host_no);
2744#endif
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757 if (hostdata->connected) {
2758 dprintk(NDEBUG_ABORT, ("scsi%d : abort failed, command connected.\n", instance->host_no));
2759 return FAILED;
2760 }
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786 for (tmp = (Scsi_Cmnd *) hostdata->disconnected_queue; tmp; tmp = (Scsi_Cmnd *) tmp->host_scribble)
2787 if (cmd == tmp) {
2788 dprintk(NDEBUG_ABORT, ("scsi%d : aborting disconnected command.\n", instance->host_no));
2789
2790 if (NCR5380_select(instance, cmd, (int) cmd->tag))
2791 return FAILED;
2792 dprintk(NDEBUG_ABORT, ("scsi%d : nexus reestablished.\n", instance->host_no));
2793
2794 do_abort(instance);
2795
2796 for (prev = (Scsi_Cmnd **) & (hostdata->disconnected_queue), tmp = (Scsi_Cmnd *) hostdata->disconnected_queue; tmp; prev = (Scsi_Cmnd **) & (tmp->host_scribble), tmp = (Scsi_Cmnd *) tmp->host_scribble)
2797 if (cmd == tmp) {
2798 REMOVE(5, *prev, tmp, tmp->host_scribble);
2799 *prev = (Scsi_Cmnd *) tmp->host_scribble;
2800 tmp->host_scribble = NULL;
2801 tmp->result = DID_ABORT << 16;
2802 tmp->scsi_done(tmp);
2803 return SUCCESS;
2804 }
2805 }
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815 printk(KERN_WARNING "scsi%d : warning : SCSI command probably completed successfully\n"
2816 " before abortion\n", instance->host_no);
2817 return FAILED;
2818}
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831static int NCR5380_bus_reset(Scsi_Cmnd * cmd)
2832{
2833 struct Scsi_Host *instance = cmd->device->host;
2834
2835 NCR5380_local_declare();
2836 NCR5380_setup(instance);
2837 NCR5380_print_status(instance);
2838
2839 spin_lock_irq(instance->host_lock);
2840 do_reset(instance);
2841 spin_unlock_irq(instance->host_lock);
2842
2843 return SUCCESS;
2844}