forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
a100u2w.c
1243 lines (1069 loc) · 36 KB
/
a100u2w.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Initio A100 device driver for Linux.
*
* Copyright (c) 1994-1998 Initio Corporation
* Copyright (c) 2003-2004 Christoph Hellwig
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; see the file COPYING. If not, write to
* the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
* ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/*
* Revision History:
* 07/02/98 hl - v.91n Initial drivers.
* 09/14/98 hl - v1.01 Support new Kernel.
* 09/22/98 hl - v1.01a Support reset.
* 09/24/98 hl - v1.01b Fixed reset.
* 10/05/98 hl - v1.02 split the source code and release.
* 12/19/98 bv - v1.02a Use spinlocks for 2.1.95 and up
* 01/31/99 bv - v1.02b Use mdelay instead of waitForPause
* 08/08/99 bv - v1.02c Use waitForPause again.
* 06/25/02 Doug Ledford <[email protected]> - v1.02d
* - Remove limit on number of controllers
* - Port to DMA mapping API
* - Clean up interrupt handler registration
* - Fix memory leaks
* - Fix allocation of scsi host structs and private data
* 11/18/03 Christoph Hellwig <[email protected]>
* - Port to new probing API
* - Fix some more leaks in init failure cases
* 9/28/04 Christoph Hellwig <[email protected]>
* - merge the two source files
* - remove internal queueing code
* 14/06/07 Alan Cox <[email protected]>
* - Grand cleanup and Linuxisation
*/
#include <linux/module.h>
#include <linux/errno.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/pci.h>
#include <linux/init.h>
#include <linux/blkdev.h>
#include <linux/spinlock.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/ioport.h>
#include <linux/dma-mapping.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_host.h>
#include "a100u2w.h"
static struct orc_scb *__orc_alloc_scb(struct orc_host * host);
static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb);
static struct orc_nvram nvram, *nvramp = &nvram;
static u8 default_nvram[64] =
{
/*----------header -------------*/
0x01, /* 0x00: Sub System Vendor ID 0 */
0x11, /* 0x01: Sub System Vendor ID 1 */
0x60, /* 0x02: Sub System ID 0 */
0x10, /* 0x03: Sub System ID 1 */
0x00, /* 0x04: SubClass */
0x01, /* 0x05: Vendor ID 0 */
0x11, /* 0x06: Vendor ID 1 */
0x60, /* 0x07: Device ID 0 */
0x10, /* 0x08: Device ID 1 */
0x00, /* 0x09: Reserved */
0x00, /* 0x0A: Reserved */
0x01, /* 0x0B: Revision of Data Structure */
/* -- Host Adapter Structure --- */
0x01, /* 0x0C: Number Of SCSI Channel */
0x01, /* 0x0D: BIOS Configuration 1 */
0x00, /* 0x0E: BIOS Configuration 2 */
0x00, /* 0x0F: BIOS Configuration 3 */
/* --- SCSI Channel 0 Configuration --- */
0x07, /* 0x10: H/A ID */
0x83, /* 0x11: Channel Configuration */
0x20, /* 0x12: MAX TAG per target */
0x0A, /* 0x13: SCSI Reset Recovering time */
0x00, /* 0x14: Channel Configuration4 */
0x00, /* 0x15: Channel Configuration5 */
/* SCSI Channel 0 Target Configuration */
/* 0x16-0x25 */
0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
/* --- SCSI Channel 1 Configuration --- */
0x07, /* 0x26: H/A ID */
0x83, /* 0x27: Channel Configuration */
0x20, /* 0x28: MAX TAG per target */
0x0A, /* 0x29: SCSI Reset Recovering time */
0x00, /* 0x2A: Channel Configuration4 */
0x00, /* 0x2B: Channel Configuration5 */
/* SCSI Channel 1 Target Configuration */
/* 0x2C-0x3B */
0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8, 0xC8,
0x00, /* 0x3C: Reserved */
0x00, /* 0x3D: Reserved */
0x00, /* 0x3E: Reserved */
0x00 /* 0x3F: Checksum */
};
static u8 wait_chip_ready(struct orc_host * host)
{
int i;
for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
if (inb(host->base + ORC_HCTRL) & HOSTSTOP) /* Wait HOSTSTOP set */
return 1;
mdelay(100);
}
return 0;
}
static u8 wait_firmware_ready(struct orc_host * host)
{
int i;
for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
if (inb(host->base + ORC_HSTUS) & RREADY) /* Wait READY set */
return 1;
mdelay(100); /* wait 100ms before try again */
}
return 0;
}
/***************************************************************************/
static u8 wait_scsi_reset_done(struct orc_host * host)
{
int i;
for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
if (!(inb(host->base + ORC_HCTRL) & SCSIRST)) /* Wait SCSIRST done */
return 1;
mdelay(100); /* wait 100ms before try again */
}
return 0;
}
/***************************************************************************/
static u8 wait_HDO_off(struct orc_host * host)
{
int i;
for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
if (!(inb(host->base + ORC_HCTRL) & HDO)) /* Wait HDO off */
return 1;
mdelay(100); /* wait 100ms before try again */
}
return 0;
}
/***************************************************************************/
static u8 wait_hdi_set(struct orc_host * host, u8 * data)
{
int i;
for (i = 0; i < 10; i++) { /* Wait 1 second for report timeout */
if ((*data = inb(host->base + ORC_HSTUS)) & HDI)
return 1; /* Wait HDI set */
mdelay(100); /* wait 100ms before try again */
}
return 0;
}
/***************************************************************************/
static unsigned short orc_read_fwrev(struct orc_host * host)
{
u16 version;
u8 data;
outb(ORC_CMD_VERSION, host->base + ORC_HDATA);
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
return 0;
version = inb(host->base + ORC_HDATA);
outb(data, host->base + ORC_HSTUS); /* Clear HDI */
if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
return 0;
version |= inb(host->base + ORC_HDATA) << 8;
outb(data, host->base + ORC_HSTUS); /* Clear HDI */
return version;
}
/***************************************************************************/
static u8 orc_nv_write(struct orc_host * host, unsigned char address, unsigned char value)
{
outb(ORC_CMD_SET_NVM, host->base + ORC_HDATA); /* Write command */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
outb(address, host->base + ORC_HDATA); /* Write address */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
outb(value, host->base + ORC_HDATA); /* Write value */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
return 1;
}
/***************************************************************************/
static u8 orc_nv_read(struct orc_host * host, u8 address, u8 *ptr)
{
unsigned char data;
outb(ORC_CMD_GET_NVM, host->base + ORC_HDATA); /* Write command */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
outb(address, host->base + ORC_HDATA); /* Write address */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
return 0;
*ptr = inb(host->base + ORC_HDATA);
outb(data, host->base + ORC_HSTUS); /* Clear HDI */
return 1;
}
/**
* orc_exec_sb - Queue an SCB with the HA
* @host: host adapter the SCB belongs to
* @scb: SCB to queue for execution
*/
static void orc_exec_scb(struct orc_host * host, struct orc_scb * scb)
{
scb->status = ORCSCB_POST;
outb(scb->scbidx, host->base + ORC_PQUEUE);
}
/**
* se2_rd_all - read SCSI parameters from EEPROM
* @host: Host whose EEPROM is being loaded
*
* Read SCSI H/A configuration parameters from serial EEPROM
*/
static int se2_rd_all(struct orc_host * host)
{
int i;
u8 *np, chksum = 0;
np = (u8 *) nvramp;
for (i = 0; i < 64; i++, np++) { /* <01> */
if (orc_nv_read(host, (u8) i, np) == 0)
return -1;
}
/*------ Is ckecksum ok ? ------*/
np = (u8 *) nvramp;
for (i = 0; i < 63; i++)
chksum += *np++;
if (nvramp->CheckSum != (u8) chksum)
return -1;
return 1;
}
/**
* se2_update_all - update the EEPROM
* @host: Host whose EEPROM is being updated
*
* Update changed bytes in the EEPROM image.
*/
static void se2_update_all(struct orc_host * host)
{ /* setup default pattern */
int i;
u8 *np, *np1, chksum = 0;
/* Calculate checksum first */
np = (u8 *) default_nvram;
for (i = 0; i < 63; i++)
chksum += *np++;
*np = chksum;
np = (u8 *) default_nvram;
np1 = (u8 *) nvramp;
for (i = 0; i < 64; i++, np++, np1++) {
if (*np != *np1)
orc_nv_write(host, (u8) i, *np);
}
}
/**
* read_eeprom - load EEPROM
* @host: Host EEPROM to read
*
* Read the EEPROM for a given host. If it is invalid or fails
* the restore the defaults and use them.
*/
static void read_eeprom(struct orc_host * host)
{
if (se2_rd_all(host) != 1) {
se2_update_all(host); /* setup default pattern */
se2_rd_all(host); /* load again */
}
}
/**
* orc_load_firmware - initialise firmware
* @host: Host to set up
*
* Load the firmware from the EEPROM into controller SRAM. This
* is basically a 4K block copy and then a 4K block read to check
* correctness. The rest is convulted by the indirect interfaces
* in the hardware
*/
static u8 orc_load_firmware(struct orc_host * host)
{
u32 data32;
u16 bios_addr;
u16 i;
u8 *data32_ptr, data;
/* Set up the EEPROM for access */
data = inb(host->base + ORC_GCFG);
outb(data | EEPRG, host->base + ORC_GCFG); /* Enable EEPROM programming */
outb(0x00, host->base + ORC_EBIOSADR2);
outw(0x0000, host->base + ORC_EBIOSADR0);
if (inb(host->base + ORC_EBIOSDATA) != 0x55) {
outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
return 0;
}
outw(0x0001, host->base + ORC_EBIOSADR0);
if (inb(host->base + ORC_EBIOSDATA) != 0xAA) {
outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
return 0;
}
outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL); /* Enable SRAM programming */
data32_ptr = (u8 *) & data32;
data32 = cpu_to_le32(0); /* Initial FW address to 0 */
outw(0x0010, host->base + ORC_EBIOSADR0);
*data32_ptr = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
outw(0x0011, host->base + ORC_EBIOSADR0);
*(data32_ptr + 1) = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
outw(0x0012, host->base + ORC_EBIOSADR0);
*(data32_ptr + 2) = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
outw(*(data32_ptr + 2), host->base + ORC_EBIOSADR2);
outl(le32_to_cpu(data32), host->base + ORC_FWBASEADR); /* Write FW address */
/* Copy the code from the BIOS to the SRAM */
udelay(500); /* Required on Sun Ultra 5 ... 350 -> failures */
bios_addr = (u16) le32_to_cpu(data32); /* FW code locate at BIOS address + ? */
for (i = 0, data32_ptr = (u8 *) & data32; /* Download the code */
i < 0x1000; /* Firmware code size = 4K */
i++, bios_addr++) {
outw(bios_addr, host->base + ORC_EBIOSADR0);
*data32_ptr++ = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
if ((i % 4) == 3) {
outl(le32_to_cpu(data32), host->base + ORC_RISCRAM); /* Write every 4 bytes */
data32_ptr = (u8 *) & data32;
}
}
/* Go back and check they match */
outb(PRGMRST | DOWNLOAD, host->base + ORC_RISCCTL); /* Reset program count 0 */
bios_addr -= 0x1000; /* Reset the BIOS adddress */
for (i = 0, data32_ptr = (u8 *) & data32; /* Check the code */
i < 0x1000; /* Firmware code size = 4K */
i++, bios_addr++) {
outw(bios_addr, host->base + ORC_EBIOSADR0);
*data32_ptr++ = inb(host->base + ORC_EBIOSDATA); /* Read from BIOS */
if ((i % 4) == 3) {
if (inl(host->base + ORC_RISCRAM) != le32_to_cpu(data32)) {
outb(PRGMRST, host->base + ORC_RISCCTL); /* Reset program to 0 */
outb(data, host->base + ORC_GCFG); /*Disable EEPROM programming */
return 0;
}
data32_ptr = (u8 *) & data32;
}
}
/* Success */
outb(PRGMRST, host->base + ORC_RISCCTL); /* Reset program to 0 */
outb(data, host->base + ORC_GCFG); /* Disable EEPROM programming */
return 1;
}
/***************************************************************************/
static void setup_SCBs(struct orc_host * host)
{
struct orc_scb *scb;
int i;
struct orc_extended_scb *escb;
dma_addr_t escb_phys;
/* Setup SCB base and SCB Size registers */
outb(ORC_MAXQUEUE, host->base + ORC_SCBSIZE); /* Total number of SCBs */
/* SCB base address 0 */
outl(host->scb_phys, host->base + ORC_SCBBASE0);
/* SCB base address 1 */
outl(host->scb_phys, host->base + ORC_SCBBASE1);
/* setup scatter list address with one buffer */
scb = host->scb_virt;
escb = host->escb_virt;
for (i = 0; i < ORC_MAXQUEUE; i++) {
escb_phys = (host->escb_phys + (sizeof(struct orc_extended_scb) * i));
scb->sg_addr = cpu_to_le32((u32) escb_phys);
scb->sense_addr = cpu_to_le32((u32) escb_phys);
scb->escb = escb;
scb->scbidx = i;
scb++;
escb++;
}
}
/**
* init_alloc_map - initialise allocation map
* @host: host map to configure
*
* Initialise the allocation maps for this device. If the device
* is not quiescent the caller must hold the allocation lock
*/
static void init_alloc_map(struct orc_host * host)
{
u8 i, j;
for (i = 0; i < MAX_CHANNELS; i++) {
for (j = 0; j < 8; j++) {
host->allocation_map[i][j] = 0xffffffff;
}
}
}
/**
* init_orchid - initialise the host adapter
* @host:host adapter to initialise
*
* Initialise the controller and if necessary load the firmware.
*
* Returns -1 if the initialisation fails.
*/
static int init_orchid(struct orc_host * host)
{
u8 *ptr;
u16 revision;
u8 i;
init_alloc_map(host);
outb(0xFF, host->base + ORC_GIMSK); /* Disable all interrupts */
if (inb(host->base + ORC_HSTUS) & RREADY) { /* Orchid is ready */
revision = orc_read_fwrev(host);
if (revision == 0xFFFF) {
outb(DEVRST, host->base + ORC_HCTRL); /* Reset Host Adapter */
if (wait_chip_ready(host) == 0)
return -1;
orc_load_firmware(host); /* Download FW */
setup_SCBs(host); /* Setup SCB base and SCB Size registers */
outb(0x00, host->base + ORC_HCTRL); /* clear HOSTSTOP */
if (wait_firmware_ready(host) == 0)
return -1;
/* Wait for firmware ready */
} else {
setup_SCBs(host); /* Setup SCB base and SCB Size registers */
}
} else { /* Orchid is not Ready */
outb(DEVRST, host->base + ORC_HCTRL); /* Reset Host Adapter */
if (wait_chip_ready(host) == 0)
return -1;
orc_load_firmware(host); /* Download FW */
setup_SCBs(host); /* Setup SCB base and SCB Size registers */
outb(HDO, host->base + ORC_HCTRL); /* Do Hardware Reset & */
/* clear HOSTSTOP */
if (wait_firmware_ready(host) == 0) /* Wait for firmware ready */
return -1;
}
/* Load an EEProm copy into RAM */
/* Assumes single threaded at this point */
read_eeprom(host);
if (nvramp->revision != 1)
return -1;
host->scsi_id = nvramp->scsi_id;
host->BIOScfg = nvramp->BIOSConfig1;
host->max_targets = MAX_TARGETS;
ptr = (u8 *) & (nvramp->Target00Config);
for (i = 0; i < 16; ptr++, i++) {
host->target_flag[i] = *ptr;
host->max_tags[i] = ORC_MAXTAGS;
}
if (nvramp->SCSI0Config & NCC_BUSRESET)
host->flags |= HCF_SCSI_RESET;
outb(0xFB, host->base + ORC_GIMSK); /* enable RP FIFO interrupt */
return 0;
}
/**
* orc_reset_scsi_bus - perform bus reset
* @host: host being reset
*
* Perform a full bus reset on the adapter.
*/
static int orc_reset_scsi_bus(struct orc_host * host)
{ /* I need Host Control Block Information */
unsigned long flags;
spin_lock_irqsave(&host->allocation_lock, flags);
init_alloc_map(host);
/* reset scsi bus */
outb(SCSIRST, host->base + ORC_HCTRL);
/* FIXME: We can spend up to a second with the lock held and
interrupts off here */
if (wait_scsi_reset_done(host) == 0) {
spin_unlock_irqrestore(&host->allocation_lock, flags);
return FAILED;
} else {
spin_unlock_irqrestore(&host->allocation_lock, flags);
return SUCCESS;
}
}
/**
* orc_device_reset - device reset handler
* @host: host to reset
* @cmd: command causing the reset
* @target; target device
*
* Reset registers, reset a hanging bus and kill active and disconnected
* commands for target w/o soft reset
*/
static int orc_device_reset(struct orc_host * host, struct scsi_cmnd *cmd, unsigned int target)
{ /* I need Host Control Block Information */
struct orc_scb *scb;
struct orc_extended_scb *escb;
struct orc_scb *host_scb;
u8 i;
unsigned long flags;
spin_lock_irqsave(&(host->allocation_lock), flags);
scb = (struct orc_scb *) NULL;
escb = (struct orc_extended_scb *) NULL;
/* setup scatter list address with one buffer */
host_scb = host->scb_virt;
/* FIXME: is this safe if we then fail to issue the reset or race
a completion ? */
init_alloc_map(host);
/* Find the scb corresponding to the command */
for (i = 0; i < ORC_MAXQUEUE; i++) {
escb = host_scb->escb;
if (host_scb->status && escb->srb == cmd)
break;
host_scb++;
}
if (i == ORC_MAXQUEUE) {
printk(KERN_ERR "Unable to Reset - No SCB Found\n");
spin_unlock_irqrestore(&(host->allocation_lock), flags);
return FAILED;
}
/* Allocate a new SCB for the reset command to the firmware */
if ((scb = __orc_alloc_scb(host)) == NULL) {
/* Can't happen.. */
spin_unlock_irqrestore(&(host->allocation_lock), flags);
return FAILED;
}
/* Reset device is handled by the firmware, we fill in an SCB and
fire it at the controller, it does the rest */
scb->opcode = ORC_BUSDEVRST;
scb->target = target;
scb->hastat = 0;
scb->tastat = 0;
scb->status = 0x0;
scb->link = 0xFF;
scb->reserved0 = 0;
scb->reserved1 = 0;
scb->xferlen = cpu_to_le32(0);
scb->sg_len = cpu_to_le32(0);
escb->srb = NULL;
escb->srb = cmd;
orc_exec_scb(host, scb); /* Start execute SCB */
spin_unlock_irqrestore(&host->allocation_lock, flags);
return SUCCESS;
}
/**
* __orc_alloc_scb - allocate an SCB
* @host: host to allocate from
*
* Allocate an SCB and return a pointer to the SCB object. NULL
* is returned if no SCB is free. The caller must already hold
* the allocator lock at this point.
*/
static struct orc_scb *__orc_alloc_scb(struct orc_host * host)
{
u8 channel;
unsigned long idx;
u8 index;
u8 i;
channel = host->index;
for (i = 0; i < 8; i++) {
for (index = 0; index < 32; index++) {
if ((host->allocation_map[channel][i] >> index) & 0x01) {
host->allocation_map[channel][i] &= ~(1 << index);
idx = index + 32 * i;
/*
* Translate the index to a structure instance
*/
return host->scb_virt + idx;
}
}
}
return NULL;
}
/**
* orc_alloc_scb - allocate an SCB
* @host: host to allocate from
*
* Allocate an SCB and return a pointer to the SCB object. NULL
* is returned if no SCB is free.
*/
static struct orc_scb *orc_alloc_scb(struct orc_host * host)
{
struct orc_scb *scb;
unsigned long flags;
spin_lock_irqsave(&host->allocation_lock, flags);
scb = __orc_alloc_scb(host);
spin_unlock_irqrestore(&host->allocation_lock, flags);
return scb;
}
/**
* orc_release_scb - release an SCB
* @host: host owning the SCB
* @scb: SCB that is now free
*
* Called to return a completed SCB to the allocation pool. Before
* calling the SCB must be out of use on both the host and the HA.
*/
static void orc_release_scb(struct orc_host *host, struct orc_scb *scb)
{
unsigned long flags;
u8 index, i, channel;
spin_lock_irqsave(&(host->allocation_lock), flags);
channel = host->index; /* Channel */
index = scb->scbidx;
i = index / 32;
index %= 32;
host->allocation_map[channel][i] |= (1 << index);
spin_unlock_irqrestore(&(host->allocation_lock), flags);
}
/**
* orchid_abort_scb - abort a command
*
* Abort a queued command that has been passed to the firmware layer
* if possible. This is all handled by the firmware. We aks the firmware
* and it either aborts the command or fails
*/
static int orchid_abort_scb(struct orc_host * host, struct orc_scb * scb)
{
unsigned char data, status;
outb(ORC_CMD_ABORT_SCB, host->base + ORC_HDATA); /* Write command */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
outb(scb->scbidx, host->base + ORC_HDATA); /* Write address */
outb(HDO, host->base + ORC_HCTRL);
if (wait_HDO_off(host) == 0) /* Wait HDO off */
return 0;
if (wait_hdi_set(host, &data) == 0) /* Wait HDI set */
return 0;
status = inb(host->base + ORC_HDATA);
outb(data, host->base + ORC_HSTUS); /* Clear HDI */
if (status == 1) /* 0 - Successfully */
return 0; /* 1 - Fail */
return 1;
}
static int inia100_abort_cmd(struct orc_host * host, struct scsi_cmnd *cmd)
{
struct orc_extended_scb *escb;
struct orc_scb *scb;
u8 i;
unsigned long flags;
spin_lock_irqsave(&(host->allocation_lock), flags);
scb = host->scb_virt;
/* Walk the queue until we find the SCB that belongs to the command
block. This isn't a performance critical path so a walk in the park
here does no harm */
for (i = 0; i < ORC_MAXQUEUE; i++, scb++) {
escb = scb->escb;
if (scb->status && escb->srb == cmd) {
if (scb->tag_msg == 0) {
goto out;
} else {
/* Issue an ABORT to the firmware */
if (orchid_abort_scb(host, scb)) {
escb->srb = NULL;
spin_unlock_irqrestore(&host->allocation_lock, flags);
return SUCCESS;
} else
goto out;
}
}
}
out:
spin_unlock_irqrestore(&host->allocation_lock, flags);
return FAILED;
}
/**
* orc_interrupt - IRQ processing
* @host: Host causing the interrupt
*
* This function is called from the IRQ handler and protected
* by the host lock. While the controller reports that there are
* scb's for processing we pull them off the controller, turn the
* index into a host address pointer to the scb and call the scb
* handler.
*
* Returns IRQ_HANDLED if any SCBs were processed, IRQ_NONE otherwise
*/
static irqreturn_t orc_interrupt(struct orc_host * host)
{
u8 scb_index;
struct orc_scb *scb;
/* Check if we have an SCB queued for servicing */
if (inb(host->base + ORC_RQUEUECNT) == 0)
return IRQ_NONE;
do {
/* Get the SCB index of the SCB to service */
scb_index = inb(host->base + ORC_RQUEUE);
/* Translate it back to a host pointer */
scb = (struct orc_scb *) ((unsigned long) host->scb_virt + (unsigned long) (sizeof(struct orc_scb) * scb_index));
scb->status = 0x0;
/* Process the SCB */
inia100_scb_handler(host, scb);
} while (inb(host->base + ORC_RQUEUECNT));
return IRQ_HANDLED;
} /* End of I1060Interrupt() */
/**
* inia100_build_scb - build SCB
* @host: host owing the control block
* @scb: control block to use
* @cmd: Mid layer command
*
* Build a host adapter control block from the SCSI mid layer command
*/
static int inia100_build_scb(struct orc_host * host, struct orc_scb * scb, struct scsi_cmnd * cmd)
{ /* Create corresponding SCB */
struct scatterlist *sg;
struct orc_sgent *sgent; /* Pointer to SG list */
int i, count_sg;
struct orc_extended_scb *escb;
/* Links between the escb, scb and Linux scsi midlayer cmd */
escb = scb->escb;
escb->srb = cmd;
sgent = NULL;
/* Set up the SCB to do a SCSI command block */
scb->opcode = ORC_EXECSCSI;
scb->flags = SCF_NO_DCHK; /* Clear done bit */
scb->target = cmd->device->id;
scb->lun = cmd->device->lun;
scb->reserved0 = 0;
scb->reserved1 = 0;
scb->sg_len = cpu_to_le32(0);
scb->xferlen = cpu_to_le32((u32) scsi_bufflen(cmd));
sgent = (struct orc_sgent *) & escb->sglist[0];
count_sg = scsi_dma_map(cmd);
if (count_sg < 0)
return count_sg;
BUG_ON(count_sg > TOTAL_SG_ENTRY);
/* Build the scatter gather lists */
if (count_sg) {
scb->sg_len = cpu_to_le32((u32) (count_sg * 8));
scsi_for_each_sg(cmd, sg, count_sg, i) {
sgent->base = cpu_to_le32((u32) sg_dma_address(sg));
sgent->length = cpu_to_le32((u32) sg_dma_len(sg));
sgent++;
}
} else {
scb->sg_len = cpu_to_le32(0);
sgent->base = cpu_to_le32(0);
sgent->length = cpu_to_le32(0);
}
scb->sg_addr = (u32) scb->sense_addr; /* sense_addr is already little endian */
scb->hastat = 0;
scb->tastat = 0;
scb->link = 0xFF;
scb->sense_len = SENSE_SIZE;
scb->cdb_len = cmd->cmd_len;
if (scb->cdb_len >= IMAX_CDB) {
printk("max cdb length= %x\b", cmd->cmd_len);
scb->cdb_len = IMAX_CDB;
}
scb->ident = cmd->device->lun | DISC_ALLOW;
if (cmd->device->tagged_supported) { /* Tag Support */
scb->tag_msg = SIMPLE_QUEUE_TAG; /* Do simple tag only */
} else {
scb->tag_msg = 0; /* No tag support */
}
memcpy(scb->cdb, cmd->cmnd, scb->cdb_len);
return 0;
}
/**
* inia100_queue - queue command with host
* @cmd: Command block
* @done: Completion function
*
* Called by the mid layer to queue a command. Process the command
* block, build the host specific scb structures and if there is room
* queue the command down to the controller
*/
static int inia100_queue(struct scsi_cmnd * cmd, void (*done) (struct scsi_cmnd *))
{
struct orc_scb *scb;
struct orc_host *host; /* Point to Host adapter control block */
host = (struct orc_host *) cmd->device->host->hostdata;
cmd->scsi_done = done;
/* Get free SCSI control block */
if ((scb = orc_alloc_scb(host)) == NULL)
return SCSI_MLQUEUE_HOST_BUSY;
if (inia100_build_scb(host, scb, cmd)) {
orc_release_scb(host, scb);
return SCSI_MLQUEUE_HOST_BUSY;
}
orc_exec_scb(host, scb); /* Start execute SCB */
return 0;
}
/*****************************************************************************
Function name : inia100_abort
Description : Abort a queued command.
(commands that are on the bus can't be aborted easily)
Input : host - Pointer to host adapter structure
Output : None.
Return : pSRB - Pointer to SCSI request block.
*****************************************************************************/
static int inia100_abort(struct scsi_cmnd * cmd)
{
struct orc_host *host;
host = (struct orc_host *) cmd->device->host->hostdata;
return inia100_abort_cmd(host, cmd);
}
/*****************************************************************************
Function name : inia100_reset
Description : Reset registers, reset a hanging bus and
kill active and disconnected commands for target w/o soft reset
Input : host - Pointer to host adapter structure
Output : None.
Return : pSRB - Pointer to SCSI request block.
*****************************************************************************/
static int inia100_bus_reset(struct scsi_cmnd * cmd)
{ /* I need Host Control Block Information */
struct orc_host *host;
host = (struct orc_host *) cmd->device->host->hostdata;
return orc_reset_scsi_bus(host);
}
/*****************************************************************************
Function name : inia100_device_reset
Description : Reset the device
Input : host - Pointer to host adapter structure
Output : None.
Return : pSRB - Pointer to SCSI request block.
*****************************************************************************/
static int inia100_device_reset(struct scsi_cmnd * cmd)
{ /* I need Host Control Block Information */
struct orc_host *host;
host = (struct orc_host *) cmd->device->host->hostdata;
return orc_device_reset(host, cmd, scmd_id(cmd));
}
/**
* inia100_scb_handler - interrupt callback
* @host: Host causing the interrupt
* @scb: SCB the controller returned as needing processing
*
* Perform completion processing on a control block. Do the conversions
* from host to SCSI midlayer error coding, save any sense data and
* the complete with the midlayer and recycle the scb.
*/
static void inia100_scb_handler(struct orc_host *host, struct orc_scb *scb)
{
struct scsi_cmnd *cmd; /* Pointer to SCSI request block */
struct orc_extended_scb *escb;
escb = scb->escb;
if ((cmd = (struct scsi_cmnd *) escb->srb) == NULL) {
printk(KERN_ERR "inia100_scb_handler: SRB pointer is empty\n");
orc_release_scb(host, scb); /* Release SCB for current channel */
return;
}
escb->srb = NULL;