aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/megaraid.h
blob: 4facf557cd1951d403d233e9808d6b33f65d7377 (plain)
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
#ifndef __MEGARAID_H__
#define __MEGARAID_H__

#include <linux/spinlock.h>


#define MEGARAID_VERSION	\
	"v2.00.3 (Release Date: Wed Feb 19 08:51:30 EST 2003)\n"

/*
 * Driver features - change the values to enable or disable features in the
 * driver.
 */

/*
 * Comand coalescing - This feature allows the driver to be able to combine
 * two or more commands and issue as one command in order to boost I/O
 * performance. Useful if the nature of the I/O is sequential. It is not very
 * useful for random natured I/Os.
 */
#define MEGA_HAVE_COALESCING	0

/*
 * Clustering support - Set this flag if you are planning to use the
 * clustering services provided by the megaraid controllers and planning to
 * setup a cluster
 */
#define MEGA_HAVE_CLUSTERING	1

/*
 * Driver statistics - Set this flag if you are interested in statics about
 * number of I/O completed on each logical drive and how many interrupts
 * generated. If enabled, this information is available through /proc
 * interface and through the private ioctl. Setting this flag has a
 * performance penalty.
 */
#define MEGA_HAVE_STATS		0

/*
 * Enhanced /proc interface - This feature will allow you to have a more
 * detailed /proc interface for megaraid driver. E.g., a real time update of
 * the status of the logical drives, battery status, physical drives etc.
 */
#define MEGA_HAVE_ENH_PROC	1

#define MAX_DEV_TYPE	32

#ifndef PCI_VENDOR_ID_LSI_LOGIC
#define PCI_VENDOR_ID_LSI_LOGIC		0x1000
#endif

#ifndef PCI_VENDOR_ID_AMI
#define PCI_VENDOR_ID_AMI		0x101E
#endif

#ifndef PCI_VENDOR_ID_DELL
#define PCI_VENDOR_ID_DELL		0x1028
#endif

#ifndef PCI_VENDOR_ID_INTEL
#define PCI_VENDOR_ID_INTEL		0x8086
#endif

#ifndef PCI_DEVICE_ID_AMI_MEGARAID
#define PCI_DEVICE_ID_AMI_MEGARAID	0x9010
#endif

#ifndef PCI_DEVICE_ID_AMI_MEGARAID2
#define PCI_DEVICE_ID_AMI_MEGARAID2	0x9060
#endif

#ifndef PCI_DEVICE_ID_AMI_MEGARAID3
#define PCI_DEVICE_ID_AMI_MEGARAID3	0x1960
#endif

#define PCI_DEVICE_ID_DISCOVERY		0x000E
#define PCI_DEVICE_ID_PERC4_DI		0x000F
#define PCI_DEVICE_ID_PERC4_QC_VERDE	0x0407

/* Sub-System Vendor IDs */
#define	AMI_SUBSYS_VID			0x101E
#define DELL_SUBSYS_VID			0x1028
#define	HP_SUBSYS_VID			0x103C
#define LSI_SUBSYS_VID			0x1000
#define INTEL_SUBSYS_VID		0x8086

#define HBA_SIGNATURE	      		0x3344
#define HBA_SIGNATURE_471	  	0xCCCC
#define HBA_SIGNATURE_64BIT		0x0299

#define MBOX_BUSY_WAIT			10	/* wait for up to 10 usec for
						   mailbox to be free */
#define DEFAULT_INITIATOR_ID	7

#define MAX_SGLIST		64	/* max supported in f/w */
#define MIN_SGLIST		26	/* guaranteed to support these many */
#define MAX_COMMANDS		126
#define CMDID_INT_CMDS		MAX_COMMANDS+1	/* make sure CMDID_INT_CMDS
					 	is less than max commands
						supported by any f/w */

#define MAX_CDB_LEN	     	10
#define MAX_EXT_CDB_LEN		16	/* we support cdb length up to 16 */

#define DEF_CMD_PER_LUN		63
#define MAX_CMD_PER_LUN		MAX_COMMANDS
#define MAX_FIRMWARE_STATUS	46
#define MAX_XFER_PER_CMD	(64*1024)
#define MAX_SECTORS_PER_IO	128

#define MAX_LOGICAL_DRIVES_40LD		40
#define FC_MAX_PHYSICAL_DEVICES		256
#define MAX_LOGICAL_DRIVES_8LD		8
#define MAX_CHANNELS			5
#define MAX_TARGET			15
#define MAX_PHYSICAL_DRIVES		MAX_CHANNELS*MAX_TARGET
#define MAX_ROW_SIZE_40LD		32
#define MAX_ROW_SIZE_8LD		8
#define MAX_SPAN_DEPTH			8

#define NVIRT_CHAN		4	/* # of virtual channels to represent
					   up to 60 logical drives */
struct mbox_out {
	/* 0x0 */ u8 cmd;
	/* 0x1 */ u8 cmdid;
	/* 0x2 */ u16 numsectors;
	/* 0x4 */ u32 lba;
	/* 0x8 */ u32 xferaddr;
	/* 0xC */ u8 logdrv;
	/* 0xD */ u8 numsgelements;
	/* 0xE */ u8 resvd;
} __attribute__ ((packed));

struct mbox_in {
	/* 0xF */ volatile u8 busy;
	/* 0x10 */ volatile u8 numstatus;
	/* 0x11 */ volatile u8 status;
	/* 0x12 */ volatile u8 completed[MAX_FIRMWARE_STATUS];
	volatile u8 poll;
	volatile u8 ack;
} __attribute__ ((packed));

typedef struct {
	struct mbox_out	m_out;
	struct mbox_in	m_in;
} __attribute__ ((packed)) mbox_t;

typedef struct {
	u32 xfer_segment_lo;
	u32 xfer_segment_hi;
	mbox_t mbox;
} __attribute__ ((packed)) mbox64_t;


/*
 * Passthru definitions
 */
#define MAX_REQ_SENSE_LEN       0x20

typedef struct {
	u8 timeout:3;		/* 0=6sec/1=60sec/2=10min/3=3hrs */
	u8 ars:1;
	u8 reserved:3;
	u8 islogical:1;
	u8 logdrv;		/* if islogical == 1 */
	u8 channel;		/* if islogical == 0 */
	u8 target;		/* if islogical == 0 */
	u8 queuetag;		/* unused */
	u8 queueaction;		/* unused */
	u8 cdb[MAX_CDB_LEN];
	u8 cdblen;
	u8 reqsenselen;
	u8 reqsensearea[MAX_REQ_SENSE_LEN];
	u8 numsgelements;
	u8 scsistatus;
	u32 dataxferaddr;
	u32 dataxferlen;
} __attribute__ ((packed)) mega_passthru;


/*
 * Extended passthru: support CDB > 10 bytes
 */
typedef struct {
	u8 timeout:3;		/* 0=6sec/1=60sec/2=10min/3=3hrs */
	u8 ars:1;
	u8 rsvd1:1;
	u8 cd_rom:1;
	u8 rsvd2:1;
	u8 islogical:1;
	u8 logdrv;		/* if islogical == 1 */
	u8 channel;		/* if islogical == 0 */
	u8 target;		/* if islogical == 0 */
	u8 queuetag;		/* unused */
	u8 queueaction;		/* unused */
	u8 cdblen;
	u8 rsvd3;
	u8 cdb[MAX_EXT_CDB_LEN];
	u8 numsgelements;
	u8 status;
	u8 reqsenselen;
	u8 reqsensearea[MAX_REQ_SENSE_LEN];
	u8 rsvd4;
	u32 dataxferaddr;
	u32 dataxferlen;
} __attribute__ ((packed)) mega_ext_passthru;

typedef struct {
	u64 address;
	u32 length;
} __attribute__ ((packed)) mega_sgl64;

typedef struct {
	u32 address;
	u32 length;
} __attribute__ ((packed)) mega_sglist;


/* Queued command data */
typedef struct {
	int	idx;
	u32	state;
	struct list_head	list;
	u8	raw_mbox[66];
	u32	dma_type;
	u32	dma_direction;

	Scsi_Cmnd	*cmd;
	dma_addr_t	dma_h_bulkdata;
	dma_addr_t	dma_h_sgdata;

	mega_sglist	*sgl;
	mega_sgl64	*sgl64;
	dma_addr_t	sgl_dma_addr;

	mega_passthru		*pthru;
	dma_addr_t		pthru_dma_addr;
	mega_ext_passthru	*epthru;
	dma_addr_t		epthru_dma_addr;
} scb_t;

/*
 * Flags to follow the scb as it transitions between various stages
 */
#define SCB_FREE	0x0000	/* on the free list */
#define SCB_ACTIVE	0x0001	/* off the free list */
#define SCB_PENDQ	0x0002	/* on the pending queue */
#define SCB_ISSUED	0x0004	/* issued - owner f/w */
#define SCB_ABORT	0x0008	/* Got an abort for this one */
#define SCB_RESET	0x0010	/* Got a reset for this one */

/*
 * Utilities declare this strcture size as 1024 bytes. So more fields can
 * be added in future.
 */
typedef struct {
	u32	data_size; /* current size in bytes (not including resvd) */

	u32	config_signature;
		/* Current value is 0x00282008
		 * 0x28=MAX_LOGICAL_DRIVES,
		 * 0x20=Number of stripes and
		 * 0x08=Number of spans */

	u8	fw_version[16];		/* printable ASCI string */
	u8	bios_version[16];	/* printable ASCI string */
	u8	product_name[80];	/* printable ASCI string */

	u8	max_commands;		/* Max. concurrent commands supported */
	u8	nchannels;		/* Number of SCSI Channels detected */
	u8	fc_loop_present;	/* Number of Fibre Loops detected */
	u8	mem_type;		/* EDO, FPM, SDRAM etc */

	u32	signature;
	u16	dram_size;		/* In terms of MB */
	u16	subsysid;

	u16	subsysvid;
	u8	notify_counters;
	u8	pad1k[889];		/* 135 + 889 resvd = 1024 total size */
} __attribute__ ((packed)) mega_product_info;

struct notify {
	u32 global_counter;	/* Any change increments this counter */

	u8 param_counter;	/* Indicates any params changed  */
	u8 param_id;		/* Param modified - defined below */
	u16 param_val;		/* New val of last param modified */

	u8 write_config_counter;	/* write config occurred */
	u8 write_config_rsvd[3];

	u8 ldrv_op_counter;	/* Indicates ldrv op started/completed */
	u8 ldrv_opid;		/* ldrv num */
	u8 ldrv_opcmd;		/* ldrv operation - defined below */
	u8 ldrv_opstatus;	/* status of the operation */

	u8 ldrv_state_counter;	/* Indicates change of ldrv state */
	u8 ldrv_state_id;		/* ldrv num */
	u8 ldrv_state_new;	/* New state */
	u8 ldrv_state_old;	/* old state */

	u8 pdrv_state_counter;	/* Indicates change of ldrv state */
	u8 pdrv_state_id;		/* pdrv id */
	u8 pdrv_state_new;	/* New state */
	u8 pdrv_state_old;	/* old state */

	u8 pdrv_fmt_counter;	/* Indicates pdrv format started/over */
	u8 pdrv_fmt_id;		/* pdrv id */
	u8 pdrv_fmt_val;		/* format started/over */
	u8 pdrv_fmt_rsvd;

	u8 targ_xfer_counter;	/* Indicates SCSI-2 Xfer rate change */
	u8 targ_xfer_id;	/* pdrv Id  */
	u8 targ_xfer_val;		/* new Xfer params of last pdrv */
	u8 targ_xfer_rsvd;

	u8 fcloop_id_chg_counter;	/* Indicates loopid changed */
	u8 fcloopid_pdrvid;		/* pdrv id */
	u8 fcloop_id0;			/* loopid on fc loop 0 */
	u8 fcloop_id1;			/* loopid on fc loop 1 */

	u8 fcloop_state_counter;	/* Indicates loop state changed */
	u8 fcloop_state0;		/* state of fc loop 0 */
	u8 fcloop_state1;		/* state of fc loop 1 */
	u8 fcloop_state_rsvd;
} __attribute__ ((packed));

#define MAX_NOTIFY_SIZE     0x80
#define CUR_NOTIFY_SIZE     sizeof(struct notify)

typedef struct {
	u32	data_size; /* current size in bytes (not including resvd) */

	struct notify notify;

	u8	notify_rsvd[MAX_NOTIFY_SIZE - CUR_NOTIFY_SIZE];

	u8	rebuild_rate;		/* Rebuild rate (0% - 100%) */
	u8	cache_flush_interval;	/* In terms of Seconds */
	u8	sense_alert;
	u8	drive_insert_count;	/* drive insertion count */

	u8	battery_status;
	u8	num_ldrv;		/* No. of Log Drives configured */
	u8	recon_state[MAX_LOGICAL_DRIVES_40LD / 8];	/* State of
							   reconstruct */
	u16	ldrv_op_status[MAX_LOGICAL_DRIVES_40LD / 8]; /* logdrv
								 Status */

	u32	ldrv_size[MAX_LOGICAL_DRIVES_40LD];/* Size of each log drv */
	u8	ldrv_prop[MAX_LOGICAL_DRIVES_40LD];
	u8	ldrv_state[MAX_LOGICAL_DRIVES_40LD];/* State of log drives */
	u8	pdrv_state[FC_MAX_PHYSICAL_DEVICES];/* State of phys drvs. */
	u16	pdrv_format[FC_MAX_PHYSICAL_DEVICES / 16];

	u8	targ_xfer[80];	/* phys device transfer rate */
	u8	pad1k[263];	/* 761 + 263reserved = 1024 bytes total size */
} __attribute__ ((packed)) mega_inquiry3;


/* Structures */
typedef struct {
	u8	max_commands;	/* Max concurrent commands supported */
	u8	rebuild_rate;	/* Rebuild rate - 0% thru 100% */
	u8	max_targ_per_chan;	/* Max targ per channel */
	u8	nchannels;	/* Number of channels on HBA */
	u8	fw_version[4];	/* Firmware version */
	u16	age_of_flash;	/* Number of times FW has been flashed */
	u8	chip_set_value;	/* Contents of 0xC0000832 */
	u8	dram_size;	/* In MB */
	u8	cache_flush_interval;	/* in seconds */
	u8	bios_version[4];
	u8	board_type;
	u8	sense_alert;
	u8	write_config_count;	/* Increase with every configuration
					   change */
	u8	drive_inserted_count;	/* Increase with every drive inserted
					 */
	u8	inserted_drive;	/* Channel:Id of inserted drive */
	u8	battery_status;	/*
				 * BIT 0: battery module missing
				 * BIT 1: VBAD
				 * BIT 2: temprature high
				 * BIT 3: battery pack missing
				 * BIT 4,5:
				 *   00 - charge complete
				 *   01 - fast charge in progress
				 *   10 - fast charge fail
				 *   11 - undefined
				 * Bit 6: counter > 1000
				 * Bit 7: Undefined
				 */
	u8	dec_fault_bus_info;
} __attribute__ ((packed)) mega_adp_info;


typedef struct {
	u8	num_ldrv;	/* Number of logical drives configured */
	u8	rsvd[3];
	u32	ldrv_size[MAX_LOGICAL_DRIVES_8LD];
	u8	ldrv_prop[MAX_LOGICAL_DRIVES_8LD];
	u8	ldrv_state[MAX_LOGICAL_DRIVES_8LD];
} __attribute__ ((packed)) mega_ldrv_info;

typedef struct {
	u8	pdrv_state[MAX_PHYSICAL_DRIVES];
	u8	rsvd;
} __attribute__ ((packed)) mega_pdrv_info;

/* RAID inquiry: Mailbox command 0x05*/
typedef struct {
	mega_adp_info	adapter_info;
	mega_ldrv_info	logdrv_info;
	mega_pdrv_info	pdrv_info;
} __attribute__ ((packed)) mraid_inquiry;


/* RAID extended inquiry: Mailbox command 0x04*/
typedef struct {
	mraid_inquiry	raid_inq;
	u16	phys_drv_format[MAX_CHANNELS];
	u8	stack_attn;
	u8	modem_status;
	u8	rsvd[2];
} __attribute__ ((packed)) mraid_ext_inquiry;


typedef struct {
	u8	channel;
	u8	target;
}__attribute__ ((packed)) adp_device;

typedef struct {
	u32		start_blk;	/* starting block */
	u32		num_blks;	/* # of blocks */
	adp_device	device[MAX_ROW_SIZE_40LD];
}__attribute__ ((packed)) adp_span_40ld;

typedef struct {
	u32		start_blk;	/* starting block */
	u32		num_blks;	/* # of blocks */
	adp_device	device[MAX_ROW_SIZE_8LD];
}__attribute__ ((packed)) adp_span_8ld;

typedef struct {
	u8	span_depth;	/* Total # of spans */
	u8	level;		/* RAID level */
	u8	read_ahead;	/* read ahead, no read ahead, adaptive read
				   ahead */
	u8	stripe_sz;	/* Encoded stripe size */
	u8	status;		/* Status of the logical drive */
	u8	write_mode;	/* write mode, write_through/write_back */
	u8	direct_io;	/* direct io or through cache */
	u8	row_size;	/* Number of stripes in a row */
} __attribute__ ((packed)) logdrv_param;

typedef struct {
	logdrv_param	lparam;
	adp_span_40ld	span[MAX_SPAN_DEPTH];
}__attribute__ ((packed)) logdrv_40ld;

typedef struct {
	logdrv_param	lparam;
	adp_span_8ld	span[MAX_SPAN_DEPTH];
}__attribute__ ((packed)) logdrv_8ld;

typedef struct {
	u8	type;		/* Type of the device */
	u8	cur_status;	/* current status of the device */
	u8	tag_depth;	/* Level of tagging */
	u8	sync_neg;	/* sync negotiation - ENABLE or DISBALE */
	u32	size;		/* configurable size in terms of 512 byte
				   blocks */
}__attribute__ ((packed)) phys_drv;

typedef struct {
	u8		nlog_drives;		/* number of logical drives */
	u8		resvd[3];
	logdrv_40ld	ldrv[MAX_LOGICAL_DRIVES_40LD];
	phys_drv	pdrv[MAX_PHYSICAL_DRIVES];
}__attribute__ ((packed)) disk_array_40ld;

typedef struct {
	u8		nlog_drives;	/* number of logical drives */
	u8		resvd[3];
	logdrv_8ld	ldrv[MAX_LOGICAL_DRIVES_8LD];
	phys_drv	pdrv[MAX_PHYSICAL_DRIVES];
}__attribute__ ((packed)) disk_array_8ld;


/*
 * User ioctl structure.
 * This structure will be used for Traditional Method ioctl interface
 * commands (0x80),Alternate Buffer Method (0x81) ioctl commands and the
 * Driver ioctls.
 * The Driver ioctl interface handles the commands at the driver level,
 * without being sent to the card.
 */
/* system call imposed limit. Change accordingly */
#define IOCTL_MAX_DATALEN       4096

struct uioctl_t {
	u32 inlen;
	u32 outlen;
	union {
		u8 fca[16];
		struct {
			u8 opcode;
			u8 subopcode;
			u16 adapno;
#if BITS_PER_LONG == 32
			u8 *buffer;
			u8 pad[4];
#endif
#if BITS_PER_LONG == 64
			u8 *buffer;
#endif
			u32 length;
		} __attribute__ ((packed)) fcs;
	} __attribute__ ((packed)) ui;
	u8 mbox[18];		/* 16 bytes + 2 status bytes */
	mega_passthru pthru;
#if BITS_PER_LONG == 32
	char __user *data;		/* buffer <= 4096 for 0x80 commands */
	char pad[4];
#endif
#if BITS_PER_LONG == 64
	char __user *data;
#endif
} __attribute__ ((packed));

/*
 * struct mcontroller is used to pass information about the controllers in the
 * system. Its upto the application how to use the information. We are passing
 * as much info about the cards as possible and useful. Before issuing the
 * call to find information about the cards, the applicaiton needs to issue a
 * ioctl first to find out the number of controllers in the system.
 */
#define MAX_CONTROLLERS 32

struct mcontroller {
	u64 base;
	u8 irq;
	u8 numldrv;
	u8 pcibus;
	u16 pcidev;
	u8 pcifun;
	u16 pciid;
	u16 pcivendor;
	u8 pcislot;
	u32 uid;
};

/*
 * mailbox structure used for internal commands
 */
typedef struct {
	u8	cmd;
	u8	cmdid;
	u8	opcode;
	u8	subopcode;
	u32	lba;
	u32	xferaddr;
	u8	logdrv;
	u8	rsvd[3];
	u8	numstatus;
	u8	status;
} __attribute__ ((packed)) megacmd_t;

/*
 * Defines for Driver IOCTL interface
 */
#define MEGAIOC_MAGIC  	'm'

#define MEGAIOC_QNADAP		'm'	/* Query # of adapters */
#define MEGAIOC_QDRVRVER	'e'	/* Query driver version */
#define MEGAIOC_QADAPINFO   	'g'	/* Query adapter information */
#define MKADAP(adapno)	  	(MEGAIOC_MAGIC << 8 | (adapno) )
#define GETADAP(mkadap)	 	( (mkadap) ^ MEGAIOC_MAGIC << 8 )

/*
 * Definition for the new ioctl interface (NIT)
 */

/*
 * Vendor specific Group-7 commands
 */
#define VENDOR_SPECIFIC_COMMANDS	0xE0
#define MEGA_INTERNAL_CMD		VENDOR_SPECIFIC_COMMANDS + 0x01

/*
 * The ioctl command. No other command shall be used for this interface
 */
#define USCSICMD	VENDOR_SPECIFIC_COMMANDS

/*
 * Data direction flags
 */
#define UIOC_RD		0x00001
#define UIOC_WR		0x00002

/*
 * ioctl opcodes
 */
#define MBOX_CMD	0x00000	/* DCMD or passthru command */
#define GET_DRIVER_VER	0x10000	/* Get driver version */
#define GET_N_ADAP	0x20000	/* Get number of adapters */
#define GET_ADAP_INFO	0x30000	/* Get information about a adapter */
#define GET_CAP		0x40000	/* Get ioctl capabilities */
#define GET_STATS	0x50000	/* Get statistics, including error info */


/*
 * The ioctl structure.
 * MBOX macro converts a nitioctl_t structure to megacmd_t pointer and
 * MBOX_P macro converts a nitioctl_t pointer to megacmd_t pointer.
 */
typedef struct {
	char		signature[8];	/* Must contain "MEGANIT" */
	u32		opcode;		/* opcode for the command */
	u32		adapno;		/* adapter number */
	union {
		u8	__raw_mbox[18];
		void __user *__uaddr; /* xferaddr for non-mbox cmds */
	}__ua;

#define uioc_rmbox	__ua.__raw_mbox
#define MBOX(uioc)	((megacmd_t *)&((uioc).__ua.__raw_mbox[0]))
#define MBOX_P(uioc)	((megacmd_t __user *)&((uioc)->__ua.__raw_mbox[0]))
#define uioc_uaddr	__ua.__uaddr

	u32		xferlen;	/* xferlen for DCMD and non-mbox
					   commands */
	u32		flags;		/* data direction flags */
}nitioctl_t;


/*
 * I/O statistics for some applications like SNMP agent. The caller must
 * provide the number of logical drives for which status should be reported.
 */
typedef struct {
	int	num_ldrv;	/* Number for logical drives for which the
				   status should be reported. */
	u32	nreads[MAX_LOGICAL_DRIVES_40LD];	/* number of reads for
							each logical drive */
	u32	nreadblocks[MAX_LOGICAL_DRIVES_40LD];	/* number of blocks
							read for each logical
							drive */
	u32	nwrites[MAX_LOGICAL_DRIVES_40LD];	/* number of writes
							for each logical
							drive */
	u32	nwriteblocks[MAX_LOGICAL_DRIVES_40LD];	/* number of blocks
							writes for each
							logical drive */
	u32	rd_errors[MAX_LOGICAL_DRIVES_40LD];	/* number of read
							   errors for each
							   logical drive */
	u32	wr_errors[MAX_LOGICAL_DRIVES_40LD];	/* number of write
							   errors for each
							   logical drive */
}megastat_t;


struct private_bios_data {
	u8	geometry:4;	/*
				 * bits 0-3 - BIOS geometry
				 * 0x0001 - 1GB
				 * 0x0010 - 2GB
				 * 0x1000 - 8GB
				 * Others values are invalid
							 */
	u8	unused:4;	/* bits 4-7 are unused */
	u8	boot_drv;	/*
				 * logical drive set as boot drive
				 * 0..7 - for 8LD cards
				 * 0..39 - for 40LD cards
				 */
	u8	rsvd[12];
	u16	cksum;	/* 0-(sum of first 13 bytes of this structure) */
} __attribute__ ((packed));




/*
 * Mailbox and firmware commands and subopcodes used in this driver.
 */

#define MEGA_MBOXCMD_LREAD	0x01
#define MEGA_MBOXCMD_LWRITE	0x02
#define MEGA_MBOXCMD_PASSTHRU	0x03
#define MEGA_MBOXCMD_ADPEXTINQ	0x04
#define MEGA_MBOXCMD_ADAPTERINQ	0x05
#define MEGA_MBOXCMD_LREAD64	0xA7
#define MEGA_MBOXCMD_LWRITE64	0xA8
#define MEGA_MBOXCMD_PASSTHRU64	0xC3
#define MEGA_MBOXCMD_EXTPTHRU	0xE3

#define MAIN_MISC_OPCODE	0xA4	/* f/w misc opcode */
#define GET_MAX_SG_SUPPORT	0x01	/* get max sg len supported by f/w */

#define FC_NEW_CONFIG		0xA1
#define NC_SUBOP_PRODUCT_INFO	0x0E
#define NC_SUBOP_ENQUIRY3	0x0F
#define ENQ3_GET_SOLICITED_FULL	0x02
#define OP_DCMD_READ_CONFIG	0x04
#define NEW_READ_CONFIG_8LD	0x67
#define READ_CONFIG_8LD		0x07
#define FLUSH_ADAPTER		0x0A
#define FLUSH_SYSTEM		0xFE

/*
 * Command for random deletion of logical drives
 */
#define	FC_DEL_LOGDRV		0xA4	/* f/w command */
#define	OP_SUP_DEL_LOGDRV	0x2A	/* is feature supported */
#define OP_GET_LDID_MAP		0x18	/* get ldid and logdrv number map */
#define OP_DEL_LOGDRV		0x1C	/* delete logical drive */

/*
 * BIOS commands
 */
#define IS_BIOS_ENABLED		0x62
#define GET_BIOS		0x01
#define CHNL_CLASS		0xA9
#define GET_CHNL_CLASS		0x00
#define SET_CHNL_CLASS		0x01
#define CH_RAID			0x01
#define CH_SCSI			0x00
#define BIOS_PVT_DATA		0x40
#define GET_BIOS_PVT_DATA	0x00


/*
 * Commands to support clustering
 */
#define MEGA_GET_TARGET_ID	0x7D
#define MEGA_CLUSTER_OP		0x70
#define MEGA_GET_CLUSTER_MODE	0x02
#define MEGA_CLUSTER_CMD	0x6E
#define MEGA_RESERVE_LD		0x01
#define MEGA_RELEASE_LD		0x02
#define MEGA_RESET_RESERVATIONS	0x03
#define MEGA_RESERVATION_STATUS	0x04
#define MEGA_RESERVE_PD		0x05
#define MEGA_RELEASE_PD		0x06


/*
 * Module battery status
 */
#define MEGA_BATT_MODULE_MISSING	0x01
#define MEGA_BATT_LOW_VOLTAGE		0x02
#define MEGA_BATT_TEMP_HIGH		0x04
#define MEGA_BATT_PACK_MISSING		0x08
#define MEGA_BATT_CHARGE_MASK		0x30
#define MEGA_BATT_CHARGE_DONE		0x00
#define MEGA_BATT_CHARGE_INPROG		0x10
#define MEGA_BATT_CHARGE_FAIL		0x20
#define MEGA_BATT_CYCLES_EXCEEDED	0x40

/*
 * Physical drive states.
 */
#define PDRV_UNCNF	0
#define PDRV_ONLINE	3
#define PDRV_FAILED	4
#define PDRV_RBLD	5
#define PDRV_HOTSPARE	6


/*
 * Raid logical drive states.
 */
#define RDRV_OFFLINE	0
#define RDRV_DEGRADED	1
#define RDRV_OPTIMAL	2
#define RDRV_DELETED	3

/*
 * Read, write and cache policies
 */
#define NO_READ_AHEAD		0
#define READ_AHEAD		1
#define ADAP_READ_AHEAD		2
#define WRMODE_WRITE_THRU	0
#define WRMODE_WRITE_BACK	1
#define CACHED_IO		0
#define DIRECT_IO		1


#define SCSI_LIST(scp) ((struct list_head *)(&(scp)->SCp))

/*
 * Each controller's soft state
 */
typedef struct {
	int	this_id;	/* our id, may set to different than 7 if
				   clustering is available */
	u32	flag;

	unsigned long	base;

	/* mbox64 with mbox not aligned on 16-byte boundry */
	mbox64_t	*una_mbox64;
	dma_addr_t	una_mbox64_dma;

	volatile mbox64_t	*mbox64;/* ptr to 64-bit mailbox */
	volatile mbox_t		*mbox;	/* ptr to standard mailbox */
	dma_addr_t		mbox_dma;

	struct pci_dev	*dev;

	struct list_head	free_list;
	struct list_head	pending_list;
	struct list_head	completed_list;

	struct Scsi_Host	*host;

#define MEGA_BUFFER_SIZE (2*1024)
	u8		*mega_buffer;
	dma_addr_t	buf_dma_handle;

	mega_product_info	product_info;

	u8		max_cmds;
	scb_t		*scb_list;

	atomic_t	pend_cmds;	/* maintain a counter for pending
					   commands in firmware */

#if MEGA_HAVE_STATS
	u32	nreads[MAX_LOGICAL_DRIVES_40LD];
	u32	nreadblocks[MAX_LOGICAL_DRIVES_40LD];
	u32	nwrites[MAX_LOGICAL_DRIVES_40LD];
	u32	nwriteblocks[MAX_LOGICAL_DRIVES_40LD];
	u32	rd_errors[MAX_LOGICAL_DRIVES_40LD];
	u32	wr_errors[MAX_LOGICAL_DRIVES_40LD];
#endif

	/* Host adapter parameters */
	u8	numldrv;
	u8	fw_version[7];
	u8	bios_version[7];

#ifdef CONFIG_PROC_FS
	struct proc_dir_entry	*controller_proc_dir_entry;
	struct proc_dir_entry	*proc_read;
	struct proc_dir_entry	*proc_stat;
	struct proc_dir_entry	*proc_mbox;

#if MEGA_HAVE_ENH_PROC
	struct proc_dir_entry	*proc_rr;
	struct proc_dir_entry	*proc_battery;
#define MAX_PROC_CHANNELS	4
	struct proc_dir_entry	*proc_pdrvstat[MAX_PROC_CHANNELS];
	struct proc_dir_entry	*proc_rdrvstat[MAX_PROC_CHANNELS];
#endif

#endif

	int	has_64bit_addr;		/* are we using 64-bit addressing */
	int	support_ext_cdb;
	int	boot_ldrv_enabled;
	int	boot_ldrv;
	int	boot_pdrv_enabled;	/* boot from physical drive */
	int	boot_pdrv_ch;		/* boot physical drive channel */
	int	boot_pdrv_tgt;		/* boot physical drive target */


	int	support_random_del;	/* Do we support random deletion of
					   logdrvs */
	int	read_ldidmap;	/* set after logical drive deltion. The
				   logical drive number must be read from the
				   map */
	atomic_t	quiescent;	/* a stage reached when delete logical
					   drive needs to be done. Stop
					   sending requests to the hba till
					   delete operation is completed */
	spinlock_t	lock;

	u8	logdrv_chan[MAX_CHANNELS+NVIRT_CHAN]; /* logical drive are on
							what channels. */
	int	mega_ch_class;

	u8	sglen;	/* f/w supported scatter-gather list length */

	scb_t			int_scb;
	Scsi_Cmnd		int_scmd;
	struct semaphore	int_mtx;	/* To synchronize the internal
						commands */
	struct completion	int_waitq;	/* wait queue for internal
						 cmds */

	int	has_cluster;	/* cluster support on this HBA */
}adapter_t;


struct mega_hbas {
	int is_bios_enabled;
	adapter_t *hostdata_addr;
};


/*
 * For state flag. Do not use LSB(8 bits) which are
 * reserved for storing info about channels.
 */
#define IN_ABORT	0x80000000L
#define IN_RESET	0x40000000L
#define BOARD_MEMMAP	0x20000000L
#define BOARD_IOMAP	0x10000000L
#define BOARD_40LD   	0x08000000L
#define BOARD_64BIT	0x04000000L

#define INTR_VALID			0x40

#define PCI_CONF_AMISIG			0xa0
#define PCI_CONF_AMISIG64		0xa4


#define MEGA_DMA_TYPE_NONE		0xFFFF
#define MEGA_BULK_DATA			0x0001
#define MEGA_SGLIST			0x0002

/*
 * lockscope definitions, callers can specify the lock scope with this data
 * type. LOCK_INT would mean the caller has not acquired the lock before
 * making the call and LOCK_EXT would mean otherwise.
 */
typedef enum { LOCK_INT, LOCK_EXT } lockscope_t;

/*
 * Parameters for the io-mapped controllers
 */

/* I/O Port offsets */
#define CMD_PORT	 	0x00
#define ACK_PORT	 	0x00
#define TOGGLE_PORT		0x01
#define INTR_PORT	  	0x0a

#define MBOX_BUSY_PORT     	0x00
#define MBOX_PORT0	 	0x04
#define MBOX_PORT1	 	0x05
#define MBOX_PORT2	 	0x06
#define MBOX_PORT3	 	0x07
#define ENABLE_MBOX_REGION 	0x0B

/* I/O Port Values */
#define ISSUE_BYTE	 	0x10
#define ACK_BYTE	   	0x08
#define ENABLE_INTR_BYTE   	0xc0
#define DISABLE_INTR_BYTE  	0x00
#define VALID_INTR_BYTE    	0x40
#define MBOX_BUSY_BYTE     	0x10
#define ENABLE_MBOX_BYTE   	0x00


/* Setup some port macros here */
#define issue_command(adapter)	\
		outb_p(ISSUE_BYTE, (adapter)->base + CMD_PORT)

#define irq_state(adapter)	inb_p((adapter)->base + INTR_PORT)

#define set_irq_state(adapter, value)	\
		outb_p((value), (adapter)->base + INTR_PORT)

#define irq_ack(adapter)	\
		outb_p(ACK_BYTE, (adapter)->base + ACK_PORT)

#define irq_enable(adapter)	\
	outb_p(ENABLE_INTR_BYTE, (adapter)->base + TOGGLE_PORT)

#define irq_disable(adapter)	\
	outb_p(DISABLE_INTR_BYTE, (adapter)->base + TOGGLE_PORT)


/*
 * This is our SYSDEP area. All kernel specific detail should be placed here -
 * as much as possible
 */

/*
 * End of SYSDEP area
 */

const char *megaraid_info (struct Scsi_Host *);

static int mega_query_adapter(adapter_t *);
static int issue_scb(adapter_t *, scb_t *);
static int mega_setup_mailbox(adapter_t *);

static int megaraid_queue (Scsi_Cmnd *, void (*)(Scsi_Cmnd *));
static scb_t * mega_build_cmd(adapter_t *, Scsi_Cmnd *, int *);
static void __mega_runpendq(adapter_t *);
static int issue_scb_block(adapter_t *, u_char *);

static irqreturn_t megaraid_isr_memmapped(int, void *, struct pt_regs *);
static irqreturn_t megaraid_isr_iomapped(int, void *, struct pt_regs *);

static void mega_free_scb(adapter_t *, scb_t *);

static int megaraid_abort(Scsi_Cmnd *);
static int megaraid_reset(Scsi_Cmnd *);
static int megaraid_abort_and_reset(adapter_t *, Scsi_Cmnd *, int);
static int megaraid_biosparam(struct scsi_device *, struct block_device *,
		sector_t, int []);
static int mega_print_inquiry(char *, char *);

static int mega_build_sglist (adapter_t *adapter, scb_t *scb,
			      u32 *buffer, u32 *length);
static int __mega_busywait_mbox (adapter_t *);
static void mega_rundoneq (adapter_t *);
static void mega_cmd_done(adapter_t *, u8 [], int, int);
static inline void mega_free_sgl (adapter_t *adapter);
static void mega_8_to_40ld (mraid_inquiry *inquiry,
		mega_inquiry3 *enquiry3, mega_product_info *);

static int megadev_open (struct inode *, struct file *);
static int megadev_ioctl (struct inode *, struct file *, unsigned int,
		unsigned long);
static int mega_m_to_n(void __user *, nitioctl_t *);
static int mega_n_to_m(void __user *, megacmd_t *);

static int mega_init_scb (adapter_t *);

static int mega_is_bios_enabled (adapter_t *);

#ifdef CONFIG_PROC_FS
static void mega_create_proc_entry(int, struct proc_dir_entry *);
static int proc_read_config(char *, char **, off_t, int, int *, void *);
static int proc_read_stat(char *, char **, off_t, int, int *, void *);
static int proc_read_mbox(char *, char **, off_t, int, int *, void *);
static int proc_rebuild_rate(char *, char **, off_t, int, int *, void *);
static int proc_battery(char *, char **, off_t, int, int *, void *);
static int proc_pdrv_ch0(char *, char **, off_t, int, int *, void *);
static int proc_pdrv_ch1(char *, char **, off_t, int, int *, void *);
static int proc_pdrv_ch2(char *, char **, off_t, int, int *, void *);
static int proc_pdrv_ch3(char *, char **, off_t, int, int *, void *);
static int proc_pdrv(adapter_t *, char *, int);
static int proc_rdrv_10(char *, char **, off_t, int, int *, void *);
static int proc_rdrv_20(char *, char **, off_t, int, int *, void *);
static int proc_rdrv_30(char *, char **, off_t, int, int *, void *);
static int proc_rdrv_40(char *, char **, off_t, int, int *, void *);
static int proc_rdrv(adapter_t *, char *, int, int);
#endif

static int mega_adapinq(adapter_t *, dma_addr_t);
static int mega_internal_dev_inquiry(adapter_t *, u8, u8, dma_addr_t);

static int mega_support_ext_cdb(adapter_t *);
static mega_passthru* mega_prepare_passthru(adapter_t *, scb_t *,
		Scsi_Cmnd *, int, int);
static mega_ext_passthru* mega_prepare_extpassthru(adapter_t *,
		scb_t *, Scsi_Cmnd *, int, int);
static void mega_enum_raid_scsi(adapter_t *);
static void mega_get_boot_drv(adapter_t *);
static int mega_support_random_del(adapter_t *);
static int mega_del_logdrv(adapter_t *, int);
static int mega_do_del_logdrv(adapter_t *, int);
static void mega_get_max_sgl(adapter_t *);
static int mega_internal_command(adapter_t *, lockscope_t, megacmd_t *,
		mega_passthru *);
static void mega_internal_done(Scsi_Cmnd *);
static int mega_support_cluster(adapter_t *);
#endif

/* vi: set ts=8 sw=8 tw=78: */