aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/stex.c
blob: 47b614e8580cc264793e6ec47d61cbad4eaff647 (plain) (blame)
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
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
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
1296
1297
1298
1299
1300
1301
1302
1303
1304
/*
 * SuperTrak EX Series Storage Controller driver for Linux
 *
 *	Copyright (C) 2005-2009 Promise Technology Inc.
 *
 *	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 of the License, or (at your option) any later version.
 *
 *	Written By:
 *		Ed Lin <promise_linux@promise.com>
 *
 */

#include <linux/init.h>
#include <linux/errno.h>
#include <linux/kernel.h>
#include <linux/delay.h>
#include <linux/time.h>
#include <linux/pci.h>
#include <linux/blkdev.h>
#include <linux/interrupt.h>
#include <linux/types.h>
#include <linux/module.h>
#include <linux/spinlock.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/byteorder.h>
#include <scsi/scsi.h>
#include <scsi/scsi_device.h>
#include <scsi/scsi_cmnd.h>
#include <scsi/scsi_host.h>
#include <scsi/scsi_tcq.h>
#include <scsi/scsi_dbg.h>
#include <scsi/scsi_eh.h>

#define DRV_NAME "stex"
#define ST_DRIVER_VERSION "4.6.0000.1"
#define ST_VER_MAJOR 		4
#define ST_VER_MINOR 		6
#define ST_OEM 			0
#define ST_BUILD_VER 		1

enum {
	/* MU register offset */
	IMR0	= 0x10,	/* MU_INBOUND_MESSAGE_REG0 */
	IMR1	= 0x14,	/* MU_INBOUND_MESSAGE_REG1 */
	OMR0	= 0x18,	/* MU_OUTBOUND_MESSAGE_REG0 */
	OMR1	= 0x1c,	/* MU_OUTBOUND_MESSAGE_REG1 */
	IDBL	= 0x20,	/* MU_INBOUND_DOORBELL */
	IIS	= 0x24,	/* MU_INBOUND_INTERRUPT_STATUS */
	IIM	= 0x28,	/* MU_INBOUND_INTERRUPT_MASK */
	ODBL	= 0x2c,	/* MU_OUTBOUND_DOORBELL */
	OIS	= 0x30,	/* MU_OUTBOUND_INTERRUPT_STATUS */
	OIM	= 0x3c,	/* MU_OUTBOUND_INTERRUPT_MASK */

	/* MU register value */
	MU_INBOUND_DOORBELL_HANDSHAKE		= 1,
	MU_INBOUND_DOORBELL_REQHEADCHANGED	= 2,
	MU_INBOUND_DOORBELL_STATUSTAILCHANGED	= 4,
	MU_INBOUND_DOORBELL_HMUSTOPPED		= 8,
	MU_INBOUND_DOORBELL_RESET		= 16,

	MU_OUTBOUND_DOORBELL_HANDSHAKE		= 1,
	MU_OUTBOUND_DOORBELL_REQUESTTAILCHANGED	= 2,
	MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED	= 4,
	MU_OUTBOUND_DOORBELL_BUSCHANGE		= 8,
	MU_OUTBOUND_DOORBELL_HASEVENT		= 16,

	/* MU status code */
	MU_STATE_STARTING			= 1,
	MU_STATE_FMU_READY_FOR_HANDSHAKE	= 2,
	MU_STATE_SEND_HANDSHAKE_FRAME		= 3,
	MU_STATE_STARTED			= 4,
	MU_STATE_RESETTING			= 5,

	MU_MAX_DELAY				= 120,
	MU_HANDSHAKE_SIGNATURE			= 0x55aaaa55,
	MU_HANDSHAKE_SIGNATURE_HALF		= 0x5a5a0000,
	MU_HARD_RESET_WAIT			= 30000,
	HMU_PARTNER_TYPE			= 2,

	/* firmware returned values */
	SRB_STATUS_SUCCESS			= 0x01,
	SRB_STATUS_ERROR			= 0x04,
	SRB_STATUS_BUSY				= 0x05,
	SRB_STATUS_INVALID_REQUEST		= 0x06,
	SRB_STATUS_SELECTION_TIMEOUT		= 0x0A,
	SRB_SEE_SENSE 				= 0x80,

	/* task attribute */
	TASK_ATTRIBUTE_SIMPLE			= 0x0,
	TASK_ATTRIBUTE_HEADOFQUEUE		= 0x1,
	TASK_ATTRIBUTE_ORDERED			= 0x2,
	TASK_ATTRIBUTE_ACA			= 0x4,

	/* request count, etc. */
	MU_MAX_REQUEST				= 32,

	/* one message wasted, use MU_MAX_REQUEST+1
		to handle MU_MAX_REQUEST messages */
	MU_REQ_COUNT				= (MU_MAX_REQUEST + 1),
	MU_STATUS_COUNT				= (MU_MAX_REQUEST + 1),

	STEX_CDB_LENGTH				= 16,
	REQ_VARIABLE_LEN			= 1024,
	STATUS_VAR_LEN				= 128,
	ST_CAN_QUEUE				= MU_MAX_REQUEST,
	ST_CMD_PER_LUN				= MU_MAX_REQUEST,
	ST_MAX_SG				= 32,

	/* sg flags */
	SG_CF_EOT				= 0x80,	/* end of table */
	SG_CF_64B				= 0x40,	/* 64 bit item */
	SG_CF_HOST				= 0x20,	/* sg in host memory */
	MSG_DATA_DIR_ND				= 0,
	MSG_DATA_DIR_IN				= 1,
	MSG_DATA_DIR_OUT			= 2,

	st_shasta				= 0,
	st_vsc					= 1,
	st_vsc1					= 2,
	st_yosemite				= 3,
	st_seq					= 4,

	PASSTHRU_REQ_TYPE			= 0x00000001,
	PASSTHRU_REQ_NO_WAKEUP			= 0x00000100,
	ST_INTERNAL_TIMEOUT			= 180,

	ST_TO_CMD				= 0,
	ST_FROM_CMD				= 1,

	/* vendor specific commands of Promise */
	MGT_CMD					= 0xd8,
	SINBAND_MGT_CMD				= 0xd9,
	ARRAY_CMD				= 0xe0,
	CONTROLLER_CMD				= 0xe1,
	DEBUGGING_CMD				= 0xe2,
	PASSTHRU_CMD				= 0xe3,

	PASSTHRU_GET_ADAPTER			= 0x05,
	PASSTHRU_GET_DRVVER			= 0x10,

	CTLR_CONFIG_CMD				= 0x03,
	CTLR_SHUTDOWN				= 0x0d,

	CTLR_POWER_STATE_CHANGE			= 0x0e,
	CTLR_POWER_SAVING			= 0x01,

	PASSTHRU_SIGNATURE			= 0x4e415041,
	MGT_CMD_SIGNATURE			= 0xba,

	INQUIRY_EVPD				= 0x01,

	ST_ADDITIONAL_MEM			= 0x200000,
};

struct st_sgitem {
	u8 ctrl;	/* SG_CF_xxx */
	u8 reserved[3];
	__le32 count;
	__le32 addr;
	__le32 addr_hi;
};

struct st_sgtable {
	__le16 sg_count;
	__le16 max_sg_count;
	__le32 sz_in_byte;
	struct st_sgitem table[ST_MAX_SG];
};

struct handshake_frame {
	__le32 rb_phy;		/* request payload queue physical address */
	__le32 rb_phy_hi;
	__le16 req_sz;		/* size of each request payload */
	__le16 req_cnt;		/* count of reqs the buffer can hold */
	__le16 status_sz;	/* size of each status payload */
	__le16 status_cnt;	/* count of status the buffer can hold */
	__le32 hosttime;	/* seconds from Jan 1, 1970 (GMT) */
	__le32 hosttime_hi;
	u8 partner_type;	/* who sends this frame */
	u8 reserved0[7];
	__le32 partner_ver_major;
	__le32 partner_ver_minor;
	__le32 partner_ver_oem;
	__le32 partner_ver_build;
	__le32 extra_offset;	/* NEW */
	__le32 extra_size;	/* NEW */
	u32 reserved1[2];
};

struct req_msg {
	__le16 tag;
	u8 lun;
	u8 target;
	u8 task_attr;
	u8 task_manage;
	u8 data_dir;
	u8 payload_sz;		/* payload size in 4-byte, not used */
	u8 cdb[STEX_CDB_LENGTH];
	u8 variable[REQ_VARIABLE_LEN];
};

struct status_msg {
	__le16 tag;
	u8 lun;
	u8 target;
	u8 srb_status;
	u8 scsi_status;
	u8 reserved;
	u8 payload_sz;		/* payload size in 4-byte */
	u8 variable[STATUS_VAR_LEN];
};

struct ver_info {
	u32 major;
	u32 minor;
	u32 oem;
	u32 build;
	u32 reserved[2];
};

struct st_frame {
	u32 base[6];
	u32 rom_addr;

	struct ver_info drv_ver;
	struct ver_info bios_ver;

	u32 bus;
	u32 slot;
	u32 irq_level;
	u32 irq_vec;
	u32 id;
	u32 subid;

	u32 dimm_size;
	u8 dimm_type;
	u8 reserved[3];

	u32 channel;
	u32 reserved1;
};

struct st_drvver {
	u32 major;
	u32 minor;
	u32 oem;
	u32 build;
	u32 signature[2];
	u8 console_id;
	u8 host_no;
	u8 reserved0[2];
	u32 reserved[3];
};

#define MU_REQ_BUFFER_SIZE	(MU_REQ_COUNT * sizeof(struct req_msg))
#define MU_STATUS_BUFFER_SIZE	(MU_STATUS_COUNT * sizeof(struct status_msg))
#define MU_BUFFER_SIZE		(MU_REQ_BUFFER_SIZE + MU_STATUS_BUFFER_SIZE)
#define STEX_EXTRA_SIZE		sizeof(struct st_frame)
#define STEX_BUFFER_SIZE	(MU_BUFFER_SIZE + STEX_EXTRA_SIZE)

struct st_ccb {
	struct req_msg *req;
	struct scsi_cmnd *cmd;

	void *sense_buffer;
	unsigned int sense_bufflen;
	int sg_count;

	u32 req_type;
	u8 srb_status;
	u8 scsi_status;
};

struct st_hba {
	void __iomem *mmio_base;	/* iomapped PCI memory space */
	void *dma_mem;
	dma_addr_t dma_handle;
	size_t dma_size;

	struct Scsi_Host *host;
	struct pci_dev *pdev;

	u32 req_head;
	u32 req_tail;
	u32 status_head;
	u32 status_tail;

	struct status_msg *status_buffer;
	void *copy_buffer; /* temp buffer for driver-handled commands */
	struct st_ccb ccb[MU_MAX_REQUEST];
	struct st_ccb *wait_ccb;
	wait_queue_head_t waitq;

	unsigned int mu_status;
	int out_req_cnt;

	unsigned int cardtype;
};

static const char console_inq_page[] =
{
	0x03,0x00,0x03,0x03,0xFA,0x00,0x00,0x30,
	0x50,0x72,0x6F,0x6D,0x69,0x73,0x65,0x20,	/* "Promise " */
	0x52,0x41,0x49,0x44,0x20,0x43,0x6F,0x6E,	/* "RAID Con" */
	0x73,0x6F,0x6C,0x65,0x20,0x20,0x20,0x20,	/* "sole    " */
	0x31,0x2E,0x30,0x30,0x20,0x20,0x20,0x20,	/* "1.00    " */
	0x53,0x58,0x2F,0x52,0x53,0x41,0x46,0x2D,	/* "SX/RSAF-" */
	0x54,0x45,0x31,0x2E,0x30,0x30,0x20,0x20,	/* "TE1.00  " */
	0x0C,0x20,0x20,0x20,0x20,0x20,0x20,0x20
};

MODULE_AUTHOR("Ed Lin");
MODULE_DESCRIPTION("Promise Technology SuperTrak EX Controllers");
MODULE_LICENSE("GPL");
MODULE_VERSION(ST_DRIVER_VERSION);

static void stex_gettime(__le32 *time)
{
	struct timeval tv;

	do_gettimeofday(&tv);
	*time = cpu_to_le32(tv.tv_sec & 0xffffffff);
	*(time + 1) = cpu_to_le32((tv.tv_sec >> 16) >> 16);
}

static struct status_msg *stex_get_status(struct st_hba *hba)
{
	struct status_msg *status =
		hba->status_buffer + hba->status_tail;

	++hba->status_tail;
	hba->status_tail %= MU_STATUS_COUNT;

	return status;
}

static void stex_invalid_field(struct scsi_cmnd *cmd,
			       void (*done)(struct scsi_cmnd *))
{
	cmd->result = (DRIVER_SENSE << 24) | SAM_STAT_CHECK_CONDITION;

	/* "Invalid field in cdb" */
	scsi_build_sense_buffer(0, cmd->sense_buffer, ILLEGAL_REQUEST, 0x24,
				0x0);
	done(cmd);
}

static struct req_msg *stex_alloc_req(struct st_hba *hba)
{
	struct req_msg *req = ((struct req_msg *)hba->dma_mem) +
		hba->req_head;

	++hba->req_head;
	hba->req_head %= MU_REQ_COUNT;

	return req;
}

static int stex_map_sg(struct st_hba *hba,
	struct req_msg *req, struct st_ccb *ccb)
{
	struct scsi_cmnd *cmd;
	struct scatterlist *sg;
	struct st_sgtable *dst;
	int i, nseg;

	cmd = ccb->cmd;
	dst = (struct st_sgtable *)req->variable;
	dst->max_sg_count = cpu_to_le16(ST_MAX_SG);
	dst->sz_in_byte = cpu_to_le32(scsi_bufflen(cmd));

	nseg = scsi_dma_map(cmd);
	if (nseg < 0)
		return -EIO;
	if (nseg) {
		ccb->sg_count = nseg;
		dst->sg_count = cpu_to_le16((u16)nseg);

		scsi_for_each_sg(cmd, sg, nseg, i) {
			dst->table[i].count = cpu_to_le32((u32)sg_dma_len(sg));
			dst->table[i].addr =
				cpu_to_le32(sg_dma_address(sg) & 0xffffffff);
			dst->table[i].addr_hi =
				cpu_to_le32((sg_dma_address(sg) >> 16) >> 16);
			dst->table[i].ctrl = SG_CF_64B | SG_CF_HOST;
		}
		dst->table[--i].ctrl |= SG_CF_EOT;
	}

	return 0;
}

static void stex_controller_info(struct st_hba *hba, struct st_ccb *ccb)
{
	struct st_frame *p;
	size_t count = sizeof(struct st_frame);

	p = hba->copy_buffer;
	count = scsi_sg_copy_to_buffer(ccb->cmd, p, count);
	memset(p->base, 0, sizeof(u32)*6);
	*(unsigned long *)(p->base) = pci_resource_start(hba->pdev, 0);
	p->rom_addr = 0;

	p->drv_ver.major = ST_VER_MAJOR;
	p->drv_ver.minor = ST_VER_MINOR;
	p->drv_ver.oem = ST_OEM;
	p->drv_ver.build = ST_BUILD_VER;

	p->bus = hba->pdev->bus->number;
	p->slot = hba->pdev->devfn;
	p->irq_level = 0;
	p->irq_vec = hba->pdev->irq;
	p->id = hba->pdev->vendor << 16 | hba->pdev->device;
	p->subid =
		hba->pdev->subsystem_vendor << 16 | hba->pdev->subsystem_device;

	count = scsi_sg_copy_from_buffer(ccb->cmd, p, count);
}

static void
stex_send_cmd(struct st_hba *hba, struct req_msg *req, u16 tag)
{
	req->tag = cpu_to_le16(tag);
	req->task_attr = TASK_ATTRIBUTE_SIMPLE;
	req->task_manage = 0; /* not supported yet */

	hba->ccb[tag].req = req;
	hba->out_req_cnt++;

	writel(hba->req_head, hba->mmio_base + IMR0);
	writel(MU_INBOUND_DOORBELL_REQHEADCHANGED, hba->mmio_base + IDBL);
	readl(hba->mmio_base + IDBL); /* flush */
}

static int
stex_slave_alloc(struct scsi_device *sdev)
{
	/* Cheat: usually extracted from Inquiry data */
	sdev->tagged_supported = 1;

	scsi_activate_tcq(sdev, ST_CMD_PER_LUN);

	return 0;
}

static int
stex_slave_config(struct scsi_device *sdev)
{
	sdev->use_10_for_rw = 1;
	sdev->use_10_for_ms = 1;
	blk_queue_rq_timeout(sdev->request_queue, 60 * HZ);
	sdev->tagged_supported = 1;

	return 0;
}

static void
stex_slave_destroy(struct scsi_device *sdev)
{
	scsi_deactivate_tcq(sdev, 1);
}

static int
stex_queuecommand(struct scsi_cmnd *cmd, void (* done)(struct scsi_cmnd *))
{
	struct st_hba *hba;
	struct Scsi_Host *host;
	unsigned int id,lun;
	struct req_msg *req;
	u16 tag;

	host = cmd->device->host;
	id = cmd->device->id;
	lun = cmd->device->lun;
	hba = (struct st_hba *) &host->hostdata[0];

	switch (cmd->cmnd[0]) {
	case MODE_SENSE_10:
	{
		static char ms10_caching_page[12] =
			{ 0, 0x12, 0, 0, 0, 0, 0, 0, 0x8, 0xa, 0x4, 0 };
		unsigned char page;

		page = cmd->cmnd[2] & 0x3f;
		if (page == 0x8 || page == 0x3f) {
			scsi_sg_copy_from_buffer(cmd, ms10_caching_page,
						 sizeof(ms10_caching_page));
			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
			done(cmd);
		} else
			stex_invalid_field(cmd, done);
		return 0;
	}
	case REPORT_LUNS:
		/*
		 * The shasta firmware does not report actual luns in the
		 * target, so fail the command to force sequential lun scan.
		 * Also, the console device does not support this command.
		 */
		if (hba->cardtype == st_shasta || id == host->max_id - 1) {
			stex_invalid_field(cmd, done);
			return 0;
		}
		break;
	case TEST_UNIT_READY:
		if (id == host->max_id - 1) {
			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
			done(cmd);
			return 0;
		}
		break;
	case INQUIRY:
		if (id != host->max_id - 1)
			break;
		if (lun == 0 && (cmd->cmnd[1] & INQUIRY_EVPD) == 0) {
			scsi_sg_copy_from_buffer(cmd, (void *)console_inq_page,
						 sizeof(console_inq_page));
			cmd->result = DID_OK << 16 | COMMAND_COMPLETE << 8;
			done(cmd);
		} else
			stex_invalid_field(cmd, done);
		return 0;
	case PASSTHRU_CMD:
		if (cmd->cmnd[1] == PASSTHRU_GET_DRVVER) {
			struct st_drvver ver;
			size_t cp_len = sizeof(ver);

			ver.major = ST_VER_MAJOR;
			ver.minor = ST_VER_MINOR;
			ver.oem = ST_OEM;
			ver.build = ST_BUILD_VER;
			ver.signature[0] = PASSTHRU_SIGNATURE;
			ver.console_id = host->max_id - 1;
			ver.host_no = hba->host->host_no;
			cp_len = scsi_sg_copy_from_buffer(cmd, &ver, cp_len);
			cmd->result = sizeof(ver) == cp_len ?
				DID_OK << 16 | COMMAND_COMPLETE << 8 :
				DID_ERROR << 16 | COMMAND_COMPLETE << 8;
			done(cmd);
			return 0;
		}
	default:
		break;
	}

	cmd->scsi_done = done;

	tag = cmd->request->tag;

	if (unlikely(tag >= host->can_queue))
		return SCSI_MLQUEUE_HOST_BUSY;

	req = stex_alloc_req(hba);

	req->lun = lun;
	req->target = id;

	/* cdb */
	memcpy(req->cdb, cmd->cmnd, STEX_CDB_LENGTH);

	if (cmd->sc_data_direction == DMA_FROM_DEVICE)
		req->data_dir = MSG_DATA_DIR_IN;
	else if (cmd->sc_data_direction == DMA_TO_DEVICE)
		req->data_dir = MSG_DATA_DIR_OUT;
	else
		req->data_dir = MSG_DATA_DIR_ND;

	hba->ccb[tag].cmd = cmd;
	hba->ccb[tag].sense_bufflen = SCSI_SENSE_BUFFERSIZE;
	hba->ccb[tag].sense_buffer = cmd->sense_buffer;
	hba->ccb[tag].req_type = 0;

	if (cmd->sc_data_direction != DMA_NONE)
		stex_map_sg(hba, req, &hba->ccb[tag]);

	stex_send_cmd(hba, req, tag);
	return 0;
}

static void stex_scsi_done(struct st_ccb *ccb)
{
	struct scsi_cmnd *cmd = ccb->cmd;
	int result;

	if (ccb->srb_status == SRB_STATUS_SUCCESS ||  ccb->srb_status == 0) {
		result = ccb->scsi_status;
		switch (ccb->scsi_status) {
		case SAM_STAT_GOOD:
			result |= DID_OK << 16 | COMMAND_COMPLETE << 8;
			break;
		case SAM_STAT_CHECK_CONDITION:
			result |= DRIVER_SENSE << 24;
			break;
		case SAM_STAT_BUSY:
			result |= DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
			break;
		default:
			result |= DID_ERROR << 16 | COMMAND_COMPLETE << 8;
			break;
		}
	}
	else if (ccb->srb_status & SRB_SEE_SENSE)
		result = DRIVER_SENSE << 24 | SAM_STAT_CHECK_CONDITION;
	else switch (ccb->srb_status) {
		case SRB_STATUS_SELECTION_TIMEOUT:
			result = DID_NO_CONNECT << 16 | COMMAND_COMPLETE << 8;
			break;
		case SRB_STATUS_BUSY:
			result = DID_BUS_BUSY << 16 | COMMAND_COMPLETE << 8;
			break;
		case SRB_STATUS_INVALID_REQUEST:
		case SRB_STATUS_ERROR:
		default:
			result = DID_ERROR << 16 | COMMAND_COMPLETE << 8;
			break;
	}

	cmd->result = result;
	cmd->scsi_done(cmd);
}

static void stex_copy_data(struct st_ccb *ccb,
	struct status_msg *resp, unsigned int variable)
{
	size_t count = variable;

	if (resp->scsi_status != SAM_STAT_GOOD) {
		if (ccb->sense_buffer != NULL)
			memcpy(ccb->sense_buffer, resp->variable,
				min(variable, ccb->sense_bufflen));
		return;
	}

	if (ccb->cmd == NULL)
		return;
	count = scsi_sg_copy_from_buffer(ccb->cmd, resp->variable, count);
}

static void stex_ys_commands(struct st_hba *hba,
	struct st_ccb *ccb, struct status_msg *resp)
{
	if (ccb->cmd->cmnd[0] == MGT_CMD &&
		resp->scsi_status != SAM_STAT_CHECK_CONDITION) {
		scsi_set_resid(ccb->cmd, scsi_bufflen(ccb->cmd) -
			le32_to_cpu(*(__le32 *)&resp->variable[0]));
	}
}

static void stex_mu_intr(struct st_hba *hba, u32 doorbell)
{
	void __iomem *base = hba->mmio_base;
	struct status_msg *resp;
	struct st_ccb *ccb;
	unsigned int size;
	u16 tag;

	if (!(doorbell & MU_OUTBOUND_DOORBELL_STATUSHEADCHANGED))
		return;

	/* status payloads */
	hba->status_head = readl(base + OMR1);
	if (unlikely(hba->status_head >= MU_STATUS_COUNT)) {
		printk(KERN_WARNING DRV_NAME "(%s): invalid status head\n",
			pci_name(hba->pdev));
		return;
	}

	/*
	 * it's not a valid status payload if:
	 * 1. there are no pending requests(e.g. during init stage)
	 * 2. there are some pending requests, but the controller is in
	 *     reset status, and its type is not st_yosemite
	 * firmware of st_yosemite in reset status will return pending requests
	 * to driver, so we allow it to pass
	 */
	if (unlikely(hba->out_req_cnt <= 0 ||
			(hba->mu_status == MU_STATE_RESETTING &&
			 hba->cardtype != st_yosemite))) {
		hba->status_tail = hba->status_head;
		goto update_status;
	}

	while (hba->status_tail != hba->status_head) {
		resp = stex_get_status(hba);
		tag = le16_to_cpu(resp->tag);
		if (unlikely(tag >= hba->host->can_queue)) {
			printk(KERN_WARNING DRV_NAME
				"(%s): invalid tag\n", pci_name(hba->pdev));
			continue;
		}

		ccb = &hba->ccb[tag];
		if (hba->wait_ccb == ccb)
			hba->wait_ccb = NULL;
		if (unlikely(ccb->req == NULL)) {
			printk(KERN_WARNING DRV_NAME
				"(%s): lagging req\n", pci_name(hba->pdev));
			hba->out_req_cnt--;
			continue;
		}

		size = resp->payload_sz * sizeof(u32); /* payload size */
		if (unlikely(size < sizeof(*resp) - STATUS_VAR_LEN ||
			size > sizeof(*resp))) {
			printk(KERN_WARNING DRV_NAME "(%s): bad status size\n",
				pci_name(hba->pdev));
		} else {
			size -= sizeof(*resp) - STATUS_VAR_LEN; /* copy size */
			if (size)
				stex_copy_data(ccb, resp, size);
		}

		ccb->req = NULL;
		ccb->srb_status = resp->srb_status;
		ccb->scsi_status = resp->scsi_status;

		if (likely(ccb->cmd != NULL)) {
			if (hba->cardtype == st_yosemite)
				stex_ys_commands(hba, ccb, resp);

			if (unlikely(ccb->cmd->cmnd[0] == PASSTHRU_CMD &&
				ccb->cmd->cmnd[1] == PASSTHRU_GET_ADAPTER))
				stex_controller_info(hba, ccb);

			scsi_dma_unmap(ccb->cmd);
			stex_scsi_done(ccb);
			hba->out_req_cnt--;
		} else if (ccb->req_type & PASSTHRU_REQ_TYPE) {
			hba->out_req_cnt--;
			if (ccb->req_type & PASSTHRU_REQ_NO_WAKEUP) {
				ccb->req_type = 0;
				continue;
			}
			ccb->req_type = 0;
			if (waitqueue_active(&hba->waitq))
				wake_up(&hba->waitq);
		}
	}

update_status:
	writel(hba->status_head, base + IMR1);
	readl(base + IMR1); /* flush */
}

static irqreturn_t stex_intr(int irq, void *__hba)
{
	struct st_hba *hba = __hba;
	void __iomem *base = hba->mmio_base;
	u32 data;
	unsigned long flags;
	int handled = 0;

	spin_lock_irqsave(hba->host->host_lock, flags);

	data = readl(base + ODBL);

	if (data && data != 0xffffffff) {
		/* clear the interrupt */
		writel(data, base + ODBL);
		readl(base + ODBL); /* flush */
		stex_mu_intr(hba, data);
		handled = 1;
	}

	spin_unlock_irqrestore(hba->host->host_lock, flags);

	return IRQ_RETVAL(handled);
}

static int stex_handshake(struct st_hba *hba)
{
	void __iomem *base = hba->mmio_base;
	struct handshake_frame *h;
	dma_addr_t status_phys;
	u32 data;
	unsigned long before;

	if (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
		writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
		readl(base + IDBL);
		before = jiffies;
		while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
			if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
				printk(KERN_ERR DRV_NAME
					"(%s): no handshake signature\n",
					pci_name(hba->pdev));
				return -1;
			}
			rmb();
			msleep(1);
		}
	}

	udelay(10);

	data = readl(base + OMR1);
	if ((data & 0xffff0000) == MU_HANDSHAKE_SIGNATURE_HALF) {
		data &= 0x0000ffff;
		if (hba->host->can_queue > data)
			hba->host->can_queue = data;
	}

	h = (struct handshake_frame *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);
	h->rb_phy = cpu_to_le32(hba->dma_handle);
	h->rb_phy_hi = cpu_to_le32((hba->dma_handle >> 16) >> 16);
	h->req_sz = cpu_to_le16(sizeof(struct req_msg));
	h->req_cnt = cpu_to_le16(MU_REQ_COUNT);
	h->status_sz = cpu_to_le16(sizeof(struct status_msg));
	h->status_cnt = cpu_to_le16(MU_STATUS_COUNT);
	stex_gettime(&h->hosttime);
	h->partner_type = HMU_PARTNER_TYPE;
	if (hba->dma_size > STEX_BUFFER_SIZE) {
		h->extra_offset = cpu_to_le32(STEX_BUFFER_SIZE);
		h->extra_size = cpu_to_le32(ST_ADDITIONAL_MEM);
	} else
		h->extra_offset = h->extra_size = 0;

	status_phys = hba->dma_handle + MU_REQ_BUFFER_SIZE;
	writel(status_phys, base + IMR0);
	readl(base + IMR0);
	writel((status_phys >> 16) >> 16, base + IMR1);
	readl(base + IMR1);

	writel((status_phys >> 16) >> 16, base + OMR0); /* old fw compatible */
	readl(base + OMR0);
	writel(MU_INBOUND_DOORBELL_HANDSHAKE, base + IDBL);
	readl(base + IDBL); /* flush */

	udelay(10);
	before = jiffies;
	while (readl(base + OMR0) != MU_HANDSHAKE_SIGNATURE) {
		if (time_after(jiffies, before + MU_MAX_DELAY * HZ)) {
			printk(KERN_ERR DRV_NAME
				"(%s): no signature after handshake frame\n",
				pci_name(hba->pdev));
			return -1;
		}
		rmb();
		msleep(1);
	}

	writel(0, base + IMR0);
	readl(base + IMR0);
	writel(0, base + OMR0);
	readl(base + OMR0);
	writel(0, base + IMR1);
	readl(base + IMR1);
	writel(0, base + OMR1);
	readl(base + OMR1); /* flush */
	hba->mu_status = MU_STATE_STARTED;
	return 0;
}

static int stex_abort(struct scsi_cmnd *cmd)
{
	struct Scsi_Host *host = cmd->device->host;
	struct st_hba *hba = (struct st_hba *)host->hostdata;
	u16 tag = cmd->request->tag;
	void __iomem *base;
	u32 data;
	int result = SUCCESS;
	unsigned long flags;

	printk(KERN_INFO DRV_NAME
		"(%s): aborting command\n", pci_name(hba->pdev));
	scsi_print_command(cmd);

	base = hba->mmio_base;
	spin_lock_irqsave(host->host_lock, flags);
	if (tag < host->can_queue && hba->ccb[tag].cmd == cmd)
		hba->wait_ccb = &hba->ccb[tag];
	else {
		for (tag = 0; tag < host->can_queue; tag++)
			if (hba->ccb[tag].cmd == cmd) {
				hba->wait_ccb = &hba->ccb[tag];
				break;
			}
		if (tag >= host->can_queue)
			goto out;
	}

	data = readl(base + ODBL);
	if (data == 0 || data == 0xffffffff)
		goto fail_out;

	writel(data, base + ODBL);
	readl(base + ODBL); /* flush */

	stex_mu_intr(hba, data);

	if (hba->wait_ccb == NULL) {
		printk(KERN_WARNING DRV_NAME
			"(%s): lost interrupt\n", pci_name(hba->pdev));
		goto out;
	}

fail_out:
	scsi_dma_unmap(cmd);
	hba->wait_ccb->req = NULL; /* nullify the req's future return */
	hba->wait_ccb = NULL;
	result = FAILED;
out:
	spin_unlock_irqrestore(host->host_lock, flags);
	return result;
}

static void stex_hard_reset(struct st_hba *hba)
{
	struct pci_bus *bus;
	int i;
	u16 pci_cmd;
	u8 pci_bctl;

	for (i = 0; i < 16; i++)
		pci_read_config_dword(hba->pdev, i * 4,
			&hba->pdev->saved_config_space[i]);

	/* Reset secondary bus. Our controller(MU/ATU) is the only device on
	   secondary bus. Consult Intel 80331/3 developer's manual for detail */
	bus = hba->pdev->bus;
	pci_read_config_byte(bus->self, PCI_BRIDGE_CONTROL, &pci_bctl);
	pci_bctl |= PCI_BRIDGE_CTL_BUS_RESET;
	pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);

	/*
	 * 1 ms may be enough for 8-port controllers. But 16-port controllers
	 * require more time to finish bus reset. Use 100 ms here for safety
	 */
	msleep(100);
	pci_bctl &= ~PCI_BRIDGE_CTL_BUS_RESET;
	pci_write_config_byte(bus->self, PCI_BRIDGE_CONTROL, pci_bctl);

	for (i = 0; i < MU_HARD_RESET_WAIT; i++) {
		pci_read_config_word(hba->pdev, PCI_COMMAND, &pci_cmd);
		if (pci_cmd != 0xffff && (pci_cmd & PCI_COMMAND_MASTER))
			break;
		msleep(1);
	}

	ssleep(5);
	for (i = 0; i < 16; i++)
		pci_write_config_dword(hba->pdev, i * 4,
			hba->pdev->saved_config_space[i]);
}

static int stex_reset(struct scsi_cmnd *cmd)
{
	struct st_hba *hba;
	unsigned long flags;
	unsigned long before;

	hba = (struct st_hba *) &cmd->device->host->hostdata[0];

	printk(KERN_INFO DRV_NAME
		"(%s): resetting host\n", pci_name(hba->pdev));
	scsi_print_command(cmd);

	hba->mu_status = MU_STATE_RESETTING;

	if (hba->cardtype == st_shasta)
		stex_hard_reset(hba);

	if (hba->cardtype != st_yosemite) {
		if (stex_handshake(hba)) {
			printk(KERN_WARNING DRV_NAME
				"(%s): resetting: handshake failed\n",
				pci_name(hba->pdev));
			return FAILED;
		}
		spin_lock_irqsave(hba->host->host_lock, flags);
		hba->req_head = 0;
		hba->req_tail = 0;
		hba->status_head = 0;
		hba->status_tail = 0;
		hba->out_req_cnt = 0;
		spin_unlock_irqrestore(hba->host->host_lock, flags);
		return SUCCESS;
	}

	/* st_yosemite */
	writel(MU_INBOUND_DOORBELL_RESET, hba->mmio_base + IDBL);
	readl(hba->mmio_base + IDBL); /* flush */
	before = jiffies;
	while (hba->out_req_cnt > 0) {
		if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ)) {
			printk(KERN_WARNING DRV_NAME
				"(%s): reset timeout\n", pci_name(hba->pdev));
			return FAILED;
		}
		msleep(1);
	}

	hba->mu_status = MU_STATE_STARTED;
	return SUCCESS;
}

static int stex_biosparam(struct scsi_device *sdev,
	struct block_device *bdev, sector_t capacity, int geom[])
{
	int heads = 255, sectors = 63;

	if (capacity < 0x200000) {
		heads = 64;
		sectors = 32;
	}

	sector_div(capacity, heads * sectors);

	geom[0] = heads;
	geom[1] = sectors;
	geom[2] = capacity;

	return 0;
}

static struct scsi_host_template driver_template = {
	.module				= THIS_MODULE,
	.name				= DRV_NAME,
	.proc_name			= DRV_NAME,
	.bios_param			= stex_biosparam,
	.queuecommand			= stex_queuecommand,
	.slave_alloc			= stex_slave_alloc,
	.slave_configure		= stex_slave_config,
	.slave_destroy			= stex_slave_destroy,
	.eh_abort_handler		= stex_abort,
	.eh_host_reset_handler		= stex_reset,
	.can_queue			= ST_CAN_QUEUE,
	.this_id			= -1,
	.sg_tablesize			= ST_MAX_SG,
	.cmd_per_lun			= ST_CMD_PER_LUN,
};

static int stex_set_dma_mask(struct pci_dev * pdev)
{
	int ret;

	if (!pci_set_dma_mask(pdev, DMA_64BIT_MASK)
		&& !pci_set_consistent_dma_mask(pdev, DMA_64BIT_MASK))
		return 0;
	ret = pci_set_dma_mask(pdev, DMA_32BIT_MASK);
	if (!ret)
		ret = pci_set_consistent_dma_mask(pdev, DMA_32BIT_MASK);
	return ret;
}

static int __devinit
stex_probe(struct pci_dev *pdev, const struct pci_device_id *id)
{
	struct st_hba *hba;
	struct Scsi_Host *host;
	int err;

	err = pci_enable_device(pdev);
	if (err)
		return err;

	pci_set_master(pdev);

	host = scsi_host_alloc(&driver_template, sizeof(struct st_hba));

	if (!host) {
		printk(KERN_ERR DRV_NAME "(%s): scsi_host_alloc failed\n",
			pci_name(pdev));
		err = -ENOMEM;
		goto out_disable;
	}

	hba = (struct st_hba *)host->hostdata;
	memset(hba, 0, sizeof(struct st_hba));

	err = pci_request_regions(pdev, DRV_NAME);
	if (err < 0) {
		printk(KERN_ERR DRV_NAME "(%s): request regions failed\n",
			pci_name(pdev));
		goto out_scsi_host_put;
	}

	hba->mmio_base = pci_ioremap_bar(pdev, 0);
	if ( !hba->mmio_base) {
		printk(KERN_ERR DRV_NAME "(%s): memory map failed\n",
			pci_name(pdev));
		err = -ENOMEM;
		goto out_release_regions;
	}

	err = stex_set_dma_mask(pdev);
	if (err) {
		printk(KERN_ERR DRV_NAME "(%s): set dma mask failed\n",
			pci_name(pdev));
		goto out_iounmap;
	}

	hba->cardtype = (unsigned int) id->driver_data;
	if (hba->cardtype == st_vsc && (pdev->subsystem_device & 1))
		hba->cardtype = st_vsc1;
	hba->dma_size = (hba->cardtype == st_vsc1 || hba->cardtype == st_seq) ?
		(STEX_BUFFER_SIZE + ST_ADDITIONAL_MEM) : (STEX_BUFFER_SIZE);
	hba->dma_mem = dma_alloc_coherent(&pdev->dev,
		hba->dma_size, &hba->dma_handle, GFP_KERNEL);
	if (!hba->dma_mem) {
		err = -ENOMEM;
		printk(KERN_ERR DRV_NAME "(%s): dma mem alloc failed\n",
			pci_name(pdev));
		goto out_iounmap;
	}

	hba->status_buffer =
		(struct status_msg *)(hba->dma_mem + MU_REQ_BUFFER_SIZE);
	hba->copy_buffer = hba->dma_mem + MU_BUFFER_SIZE;
	hba->mu_status = MU_STATE_STARTING;

	if (hba->cardtype == st_shasta) {
		host->max_lun = 8;
		host->max_id = 16 + 1;
	} else if (hba->cardtype == st_yosemite) {
		host->max_lun = 256;
		host->max_id = 1 + 1;
	} else {
		/* st_vsc , st_vsc1 and st_seq */
		host->max_lun = 1;
		host->max_id = 128 + 1;
	}
	host->max_channel = 0;
	host->unique_id = host->host_no;
	host->max_cmd_len = STEX_CDB_LENGTH;

	hba->host = host;
	hba->pdev = pdev;
	init_waitqueue_head(&hba->waitq);

	err = request_irq(pdev->irq, stex_intr, IRQF_SHARED, DRV_NAME, hba);
	if (err) {
		printk(KERN_ERR DRV_NAME "(%s): request irq failed\n",
			pci_name(pdev));
		goto out_pci_free;
	}

	err = stex_handshake(hba);
	if (err)
		goto out_free_irq;

	err = scsi_init_shared_tag_map(host, host->can_queue);
	if (err) {
		printk(KERN_ERR DRV_NAME "(%s): init shared queue failed\n",
			pci_name(pdev));
		goto out_free_irq;
	}

	pci_set_drvdata(pdev, hba);

	err = scsi_add_host(host, &pdev->dev);
	if (err) {
		printk(KERN_ERR DRV_NAME "(%s): scsi_add_host failed\n",
			pci_name(pdev));
		goto out_free_irq;
	}

	scsi_scan_host(host);

	return 0;

out_free_irq:
	free_irq(pdev->irq, hba);
out_pci_free:
	dma_free_coherent(&pdev->dev, hba->dma_size,
			  hba->dma_mem, hba->dma_handle);
out_iounmap:
	iounmap(hba->mmio_base);
out_release_regions:
	pci_release_regions(pdev);
out_scsi_host_put:
	scsi_host_put(host);
out_disable:
	pci_disable_device(pdev);

	return err;
}

static void stex_hba_stop(struct st_hba *hba)
{
	struct req_msg *req;
	unsigned long flags;
	unsigned long before;
	u16 tag = 0;

	spin_lock_irqsave(hba->host->host_lock, flags);
	req = stex_alloc_req(hba);
	memset(req->cdb, 0, STEX_CDB_LENGTH);

	if (hba->cardtype == st_yosemite) {
		req->cdb[0] = MGT_CMD;
		req->cdb[1] = MGT_CMD_SIGNATURE;
		req->cdb[2] = CTLR_CONFIG_CMD;
		req->cdb[3] = CTLR_SHUTDOWN;
	} else {
		req->cdb[0] = CONTROLLER_CMD;
		req->cdb[1] = CTLR_POWER_STATE_CHANGE;
		req->cdb[2] = CTLR_POWER_SAVING;
	}

	hba->ccb[tag].cmd = NULL;
	hba->ccb[tag].sg_count = 0;
	hba->ccb[tag].sense_bufflen = 0;
	hba->ccb[tag].sense_buffer = NULL;
	hba->ccb[tag].req_type |= PASSTHRU_REQ_TYPE;

	stex_send_cmd(hba, req, tag);
	spin_unlock_irqrestore(hba->host->host_lock, flags);

	before = jiffies;
	while (hba->ccb[tag].req_type & PASSTHRU_REQ_TYPE) {
		if (time_after(jiffies, before + ST_INTERNAL_TIMEOUT * HZ))
			return;
		msleep(10);
	}
}

static void stex_hba_free(struct st_hba *hba)
{
	free_irq(hba->pdev->irq, hba);

	iounmap(hba->mmio_base);

	pci_release_regions(hba->pdev);

	dma_free_coherent(&hba->pdev->dev, hba->dma_size,
			  hba->dma_mem, hba->dma_handle);
}

static void stex_remove(struct pci_dev *pdev)
{
	struct st_hba *hba = pci_get_drvdata(pdev);

	scsi_remove_host(hba->host);

	pci_set_drvdata(pdev, NULL);

	stex_hba_stop(hba);

	stex_hba_free(hba);

	scsi_host_put(hba->host);

	pci_disable_device(pdev);
}

static void stex_shutdown(struct pci_dev *pdev)
{
	struct st_hba *hba = pci_get_drvdata(pdev);

	stex_hba_stop(hba);
}

static struct pci_device_id stex_pci_tbl[] = {
	/* st_shasta */
	{ 0x105a, 0x8350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
		st_shasta }, /* SuperTrak EX8350/8300/16350/16300 */
	{ 0x105a, 0xc350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
		st_shasta }, /* SuperTrak EX12350 */
	{ 0x105a, 0x4302, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
		st_shasta }, /* SuperTrak EX4350 */
	{ 0x105a, 0xe350, PCI_ANY_ID, PCI_ANY_ID, 0, 0,
		st_shasta }, /* SuperTrak EX24350 */

	/* st_vsc */
	{ 0x105a, 0x7250, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_vsc },

	/* st_yosemite */
	{ 0x105a, 0x8650, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_yosemite },

	/* st_seq */
	{ 0x105a, 0x3360, PCI_ANY_ID, PCI_ANY_ID, 0, 0, st_seq },
	{ }	/* terminate list */
};
MODULE_DEVICE_TABLE(pci, stex_pci_tbl);

static struct pci_driver stex_pci_driver = {
	.name		= DRV_NAME,
	.id_table	= stex_pci_tbl,
	.probe		= stex_probe,
	.remove		= __devexit_p(stex_remove),
	.shutdown	= stex_shutdown,
};

static int __init stex_init(void)
{
	printk(KERN_INFO DRV_NAME
		": Promise SuperTrak EX Driver version: %s\n",
		 ST_DRIVER_VERSION);

	return pci_register_driver(&stex_pci_driver);
}

static void __exit stex_exit(void)
{
	pci_unregister_driver(&stex_pci_driver);
}

module_init(stex_init);
module_exit(stex_exit);