aboutsummaryrefslogtreecommitdiff
path: root/drivers/scsi/gdth.h
blob: fbf6f0f4b0dd2ccc2f88442c70828fa3c5ad4c41 (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
#ifndef _GDTH_H
#define _GDTH_H

/*
 * Header file for the GDT Disk Array/Storage RAID controllers driver for Linux
 * 
 * gdth.h Copyright (C) 1995-06 ICP vortex, Achim Leubner
 * See gdth.c for further informations and 
 * below for supported controller types
 *
 * <achim_leubner@adaptec.com>
 *
 * $Id: gdth.h,v 1.58 2006/01/11 16:14:09 achim Exp $
 */

#include <linux/types.h>

#ifndef TRUE
#define TRUE 1
#endif
#ifndef FALSE
#define FALSE 0
#endif

/* defines, macros */

/* driver version */
#define GDTH_VERSION_STR        "3.05"
#define GDTH_VERSION            3
#define GDTH_SUBVERSION         5

/* protocol version */
#define PROTOCOL_VERSION        1

/* OEM IDs */
#define OEM_ID_ICP      0x941c
#define OEM_ID_INTEL    0x8000

/* controller classes */
#define GDT_ISA         0x01                    /* ISA controller */
#define GDT_EISA        0x02                    /* EISA controller */
#define GDT_PCI         0x03                    /* PCI controller */
#define GDT_PCINEW      0x04                    /* new PCI controller */
#define GDT_PCIMPR      0x05                    /* PCI MPR controller */
/* GDT_EISA, controller subtypes EISA */
#define GDT3_ID         0x0130941c              /* GDT3000/3020 */
#define GDT3A_ID        0x0230941c              /* GDT3000A/3020A/3050A */
#define GDT3B_ID        0x0330941c              /* GDT3000B/3010A */
/* GDT_ISA */
#define GDT2_ID         0x0120941c              /* GDT2000/2020 */

#ifndef PCI_DEVICE_ID_VORTEX_GDT60x0
/* GDT_PCI */
#define PCI_DEVICE_ID_VORTEX_GDT60x0    0       /* GDT6000/6020/6050 */
#define PCI_DEVICE_ID_VORTEX_GDT6000B   1       /* GDT6000B/6010 */
/* GDT_PCINEW */
#define PCI_DEVICE_ID_VORTEX_GDT6x10    2       /* GDT6110/6510 */
#define PCI_DEVICE_ID_VORTEX_GDT6x20    3       /* GDT6120/6520 */
#define PCI_DEVICE_ID_VORTEX_GDT6530    4       /* GDT6530 */
#define PCI_DEVICE_ID_VORTEX_GDT6550    5       /* GDT6550 */
/* GDT_PCINEW, wide/ultra SCSI controllers */
#define PCI_DEVICE_ID_VORTEX_GDT6x17    6       /* GDT6117/6517 */
#define PCI_DEVICE_ID_VORTEX_GDT6x27    7       /* GDT6127/6527 */
#define PCI_DEVICE_ID_VORTEX_GDT6537    8       /* GDT6537 */
#define PCI_DEVICE_ID_VORTEX_GDT6557    9       /* GDT6557/6557-ECC */
/* GDT_PCINEW, wide SCSI controllers */
#define PCI_DEVICE_ID_VORTEX_GDT6x15    10      /* GDT6115/6515 */
#define PCI_DEVICE_ID_VORTEX_GDT6x25    11      /* GDT6125/6525 */
#define PCI_DEVICE_ID_VORTEX_GDT6535    12      /* GDT6535 */
#define PCI_DEVICE_ID_VORTEX_GDT6555    13      /* GDT6555/6555-ECC */
#endif

#ifndef PCI_DEVICE_ID_VORTEX_GDT6x17RP
/* GDT_MPR, RP series, wide/ultra SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT6x17RP  0x100   /* GDT6117RP/GDT6517RP */
#define PCI_DEVICE_ID_VORTEX_GDT6x27RP  0x101   /* GDT6127RP/GDT6527RP */
#define PCI_DEVICE_ID_VORTEX_GDT6537RP  0x102   /* GDT6537RP */
#define PCI_DEVICE_ID_VORTEX_GDT6557RP  0x103   /* GDT6557RP */
/* GDT_MPR, RP series, narrow/ultra SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT6x11RP  0x104   /* GDT6111RP/GDT6511RP */
#define PCI_DEVICE_ID_VORTEX_GDT6x21RP  0x105   /* GDT6121RP/GDT6521RP */
#endif
#ifndef PCI_DEVICE_ID_VORTEX_GDT6x17RD
/* GDT_MPR, RD series, wide/ultra SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT6x17RD  0x110   /* GDT6117RD/GDT6517RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x27RD  0x111   /* GDT6127RD/GDT6527RD */
#define PCI_DEVICE_ID_VORTEX_GDT6537RD  0x112   /* GDT6537RD */
#define PCI_DEVICE_ID_VORTEX_GDT6557RD  0x113   /* GDT6557RD */
/* GDT_MPR, RD series, narrow/ultra SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT6x11RD  0x114   /* GDT6111RD/GDT6511RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x21RD  0x115   /* GDT6121RD/GDT6521RD */
/* GDT_MPR, RD series, wide/ultra2 SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT6x18RD  0x118   /* GDT6118RD/GDT6518RD/
                                                   GDT6618RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x28RD  0x119   /* GDT6128RD/GDT6528RD/
                                                   GDT6628RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x38RD  0x11A   /* GDT6538RD/GDT6638RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x58RD  0x11B   /* GDT6558RD/GDT6658RD */
/* GDT_MPR, RN series (64-bit PCI), wide/ultra2 SCSI */
#define PCI_DEVICE_ID_VORTEX_GDT7x18RN  0x168   /* GDT7118RN/GDT7518RN/
                                                   GDT7618RN */
#define PCI_DEVICE_ID_VORTEX_GDT7x28RN  0x169   /* GDT7128RN/GDT7528RN/
                                                   GDT7628RN */
#define PCI_DEVICE_ID_VORTEX_GDT7x38RN  0x16A   /* GDT7538RN/GDT7638RN */
#define PCI_DEVICE_ID_VORTEX_GDT7x58RN  0x16B   /* GDT7558RN/GDT7658RN */
#endif

#ifndef PCI_DEVICE_ID_VORTEX_GDT6x19RD
/* GDT_MPR, RD series, Fibre Channel */
#define PCI_DEVICE_ID_VORTEX_GDT6x19RD  0x210   /* GDT6519RD/GDT6619RD */
#define PCI_DEVICE_ID_VORTEX_GDT6x29RD  0x211   /* GDT6529RD/GDT6629RD */
/* GDT_MPR, RN series (64-bit PCI), Fibre Channel */
#define PCI_DEVICE_ID_VORTEX_GDT7x19RN  0x260   /* GDT7519RN/GDT7619RN */
#define PCI_DEVICE_ID_VORTEX_GDT7x29RN  0x261   /* GDT7529RN/GDT7629RN */
#endif

#ifndef PCI_DEVICE_ID_VORTEX_GDTMAXRP
/* GDT_MPR, last device ID */
#define PCI_DEVICE_ID_VORTEX_GDTMAXRP   0x2ff   
#endif

#ifndef PCI_DEVICE_ID_VORTEX_GDTNEWRX
/* new GDT Rx Controller */
#define PCI_DEVICE_ID_VORTEX_GDTNEWRX   0x300
#endif

#ifndef PCI_DEVICE_ID_VORTEX_GDTNEWRX2
/* new(2) GDT Rx Controller */
#define PCI_DEVICE_ID_VORTEX_GDTNEWRX2  0x301
#endif        

#ifndef PCI_DEVICE_ID_INTEL_SRC
/* Intel Storage RAID Controller */
#define PCI_DEVICE_ID_INTEL_SRC         0x600
#endif

#ifndef PCI_DEVICE_ID_INTEL_SRC_XSCALE
/* Intel Storage RAID Controller */
#define PCI_DEVICE_ID_INTEL_SRC_XSCALE  0x601
#endif

/* limits */
#define GDTH_SCRATCH    PAGE_SIZE               /* 4KB scratch buffer */
#define GDTH_MAXCMDS    120
#define GDTH_MAXC_P_L   16                      /* max. cmds per lun */
#define GDTH_MAX_RAW    2                       /* max. cmds per raw device */
#define MAXOFFSETS      128
#define MAXHA           16
#define MAXID           127
#define MAXLUN          8
#define MAXBUS          6
#define MAX_EVENTS      100                     /* event buffer count */
#define MAX_RES_ARGS    40                      /* device reservation, 
                                                   must be a multiple of 4 */
#define MAXCYLS         1024
#define HEADS           64
#define SECS            32                      /* mapping 64*32 */
#define MEDHEADS        127
#define MEDSECS         63                      /* mapping 127*63 */
#define BIGHEADS        255
#define BIGSECS         63                      /* mapping 255*63 */

/* special command ptr. */
#define UNUSED_CMND     ((Scsi_Cmnd *)-1)
#define INTERNAL_CMND   ((Scsi_Cmnd *)-2)
#define SCREEN_CMND     ((Scsi_Cmnd *)-3)
#define SPECIAL_SCP(p)  (p==UNUSED_CMND || p==INTERNAL_CMND || p==SCREEN_CMND)

/* controller services */
#define SCSIRAWSERVICE  3
#define CACHESERVICE    9
#define SCREENSERVICE   11

/* screenservice defines */
#define MSG_INV_HANDLE  -1                      /* special message handle */
#define MSGLEN          16                      /* size of message text */
#define MSG_SIZE        34                      /* size of message structure */
#define MSG_REQUEST     0                       /* async. event: message */

/* cacheservice defines */
#define SECTOR_SIZE     0x200                   /* always 512 bytes per sec. */

/* DPMEM constants */
#define DPMEM_MAGIC     0xC0FFEE11
#define IC_HEADER_BYTES 48
#define IC_QUEUE_BYTES  4
#define DPMEM_COMMAND_OFFSET    IC_HEADER_BYTES+IC_QUEUE_BYTES*MAXOFFSETS

/* cluster_type constants */
#define CLUSTER_DRIVE         1
#define CLUSTER_MOUNTED       2
#define CLUSTER_RESERVED      4
#define CLUSTER_RESERVE_STATE (CLUSTER_DRIVE|CLUSTER_MOUNTED|CLUSTER_RESERVED)

/* commands for all services, cache service */
#define GDT_INIT        0                       /* service initialization */
#define GDT_READ        1                       /* read command */
#define GDT_WRITE       2                       /* write command */
#define GDT_INFO        3                       /* information about devices */
#define GDT_FLUSH       4                       /* flush dirty cache buffers */
#define GDT_IOCTL       5                       /* ioctl command */
#define GDT_DEVTYPE     9                       /* additional information */
#define GDT_MOUNT       10                      /* mount cache device */
#define GDT_UNMOUNT     11                      /* unmount cache device */
#define GDT_SET_FEAT    12                      /* set feat. (scatter/gather) */
#define GDT_GET_FEAT    13                      /* get features */
#define GDT_WRITE_THR   16                      /* write through */
#define GDT_READ_THR    17                      /* read through */
#define GDT_EXT_INFO    18                      /* extended info */
#define GDT_RESET       19                      /* controller reset */
#define GDT_RESERVE_DRV 20                      /* reserve host drive */
#define GDT_RELEASE_DRV 21                      /* release host drive */
#define GDT_CLUST_INFO  22                      /* cluster info */
#define GDT_RW_ATTRIBS  23                      /* R/W attribs (write thru,..)*/
#define GDT_CLUST_RESET 24                      /* releases the cluster drives*/
#define GDT_FREEZE_IO   25                      /* freezes all IOs */
#define GDT_UNFREEZE_IO 26                      /* unfreezes all IOs */
#define GDT_X_INIT_HOST 29                      /* ext. init: 64 bit support */
#define GDT_X_INFO      30                      /* ext. info for drives>2TB */

/* raw service commands */
#define GDT_RESERVE     14                      /* reserve dev. to raw serv. */
#define GDT_RELEASE     15                      /* release device */
#define GDT_RESERVE_ALL 16                      /* reserve all devices */
#define GDT_RELEASE_ALL 17                      /* release all devices */
#define GDT_RESET_BUS   18                      /* reset bus */
#define GDT_SCAN_START  19                      /* start device scan */
#define GDT_SCAN_END    20                      /* stop device scan */  
#define GDT_X_INIT_RAW  21                      /* ext. init: 64 bit support */

/* screen service commands */
#define GDT_REALTIME    3                       /* realtime clock to screens. */
#define GDT_X_INIT_SCR  4                       /* ext. init: 64 bit support */

/* IOCTL command defines */
#define SCSI_DR_INFO    0x00                    /* SCSI drive info */                   
#define SCSI_CHAN_CNT   0x05                    /* SCSI channel count */   
#define SCSI_DR_LIST    0x06                    /* SCSI drive list */
#define SCSI_DEF_CNT    0x15                    /* grown/primary defects */
#define DSK_STATISTICS  0x4b                    /* SCSI disk statistics */
#define IOCHAN_DESC     0x5d                    /* description of IO channel */
#define IOCHAN_RAW_DESC 0x5e                    /* description of raw IO chn. */
#define L_CTRL_PATTERN  0x20000000L             /* SCSI IOCTL mask */
#define ARRAY_INFO      0x12                    /* array drive info */
#define ARRAY_DRV_LIST  0x0f                    /* array drive list */
#define ARRAY_DRV_LIST2 0x34                    /* array drive list (new) */
#define LA_CTRL_PATTERN 0x10000000L             /* array IOCTL mask */
#define CACHE_DRV_CNT   0x01                    /* cache drive count */
#define CACHE_DRV_LIST  0x02                    /* cache drive list */
#define CACHE_INFO      0x04                    /* cache info */
#define CACHE_CONFIG    0x05                    /* cache configuration */
#define CACHE_DRV_INFO  0x07                    /* cache drive info */
#define BOARD_FEATURES  0x15                    /* controller features */
#define BOARD_INFO      0x28                    /* controller info */
#define SET_PERF_MODES  0x82                    /* set mode (coalescing,..) */
#define GET_PERF_MODES  0x83                    /* get mode */
#define CACHE_READ_OEM_STRING_RECORD 0x84       /* read OEM string record */ 
#define HOST_GET        0x10001L                /* get host drive list */
#define IO_CHANNEL      0x00020000L             /* default IO channel */
#define INVALID_CHANNEL 0x0000ffffL             /* invalid channel */

/* service errors */
#define S_OK            1                       /* no error */
#define S_GENERR        6                       /* general error */
#define S_BSY           7                       /* controller busy */
#define S_CACHE_UNKNOWN 12                      /* cache serv.: drive unknown */
#define S_RAW_SCSI      12                      /* raw serv.: target error */
#define S_RAW_ILL       0xff                    /* raw serv.: illegal */
#define S_NOFUNC        -2                      /* unknown function */
#define S_CACHE_RESERV  -24                     /* cache: reserv. conflict */   

/* timeout values */
#define INIT_RETRIES    100000                  /* 100000 * 1ms = 100s */
#define INIT_TIMEOUT    100000                  /* 100000 * 1ms = 100s */
#define POLL_TIMEOUT    10000                   /* 10000 * 1ms = 10s */

/* priorities */
#define DEFAULT_PRI     0x20
#define IOCTL_PRI       0x10
#define HIGH_PRI        0x08

/* data directions */
#define GDTH_DATA_IN    0x01000000L             /* data from target */
#define GDTH_DATA_OUT   0x00000000L             /* data to target */

/* BMIC registers (EISA controllers) */
#define ID0REG          0x0c80                  /* board ID */
#define EINTENABREG     0x0c89                  /* interrupt enable */
#define SEMA0REG        0x0c8a                  /* command semaphore */
#define SEMA1REG        0x0c8b                  /* status semaphore */
#define LDOORREG        0x0c8d                  /* local doorbell */
#define EDENABREG       0x0c8e                  /* EISA system doorbell enab. */
#define EDOORREG        0x0c8f                  /* EISA system doorbell */
#define MAILBOXREG      0x0c90                  /* mailbox reg. (16 bytes) */
#define EISAREG         0x0cc0                  /* EISA configuration */

/* other defines */
#define LINUX_OS        8                       /* used for cache optim. */
#define SECS32          0x1f                    /* round capacity */
#define BIOS_ID_OFFS    0x10                    /* offset contr-ID in ISABIOS */
#define LOCALBOARD      0                       /* board node always 0 */
#define ASYNCINDEX      0                       /* cmd index async. event */
#define SPEZINDEX       1                       /* cmd index unknown service */
#define COALINDEX       (GDTH_MAXCMDS + 2)

/* features */
#define SCATTER_GATHER  1                       /* s/g feature */
#define GDT_WR_THROUGH  0x100                   /* WRITE_THROUGH supported */
#define GDT_64BIT       0x200                   /* 64bit / drv>2TB support */

#include "gdth_ioctl.h"

/* screenservice message */
typedef struct {                               
    u32     msg_handle;                     /* message handle */
    u32     msg_len;                        /* size of message */
    u32     msg_alen;                       /* answer length */
    u8      msg_answer;                     /* answer flag */
    u8      msg_ext;                        /* more messages */
    u8      msg_reserved[2];
    char        msg_text[MSGLEN+2];             /* the message text */
} __attribute__((packed)) gdth_msg_str;


/* IOCTL data structures */

/* Status coalescing buffer for returning multiple requests per interrupt */
typedef struct {
    u32     status;
    u32     ext_status;
    u32     info0;
    u32     info1;
} __attribute__((packed)) gdth_coal_status;

/* performance mode data structure */
typedef struct {
    u32     version;            /* The version of this IOCTL structure. */
    u32     st_mode;            /* 0=dis., 1=st_buf_addr1 valid, 2=both  */
    u32     st_buff_addr1;      /* physical address of status buffer 1 */
    u32     st_buff_u_addr1;    /* reserved for 64 bit addressing */
    u32     st_buff_indx1;      /* reserved command idx. for this buffer */
    u32     st_buff_addr2;      /* physical address of status buffer 1 */
    u32     st_buff_u_addr2;    /* reserved for 64 bit addressing */
    u32     st_buff_indx2;      /* reserved command idx. for this buffer */
    u32     st_buff_size;       /* size of each buffer in bytes */
    u32     cmd_mode;           /* 0 = mode disabled, 1 = cmd_buff_addr1 */ 
    u32     cmd_buff_addr1;     /* physical address of cmd buffer 1 */   
    u32     cmd_buff_u_addr1;   /* reserved for 64 bit addressing */
    u32     cmd_buff_indx1;     /* cmd buf addr1 unique identifier */
    u32     cmd_buff_addr2;     /* physical address of cmd buffer 1 */   
    u32     cmd_buff_u_addr2;   /* reserved for 64 bit addressing */
    u32     cmd_buff_indx2;     /* cmd buf addr1 unique identifier */
    u32     cmd_buff_size;      /* size of each cmd buffer in bytes */
    u32     reserved1;
    u32     reserved2;
} __attribute__((packed)) gdth_perf_modes;

/* SCSI drive info */
typedef struct {
    u8      vendor[8];                      /* vendor string */
    u8      product[16];                    /* product string */
    u8      revision[4];                    /* revision */
    u32     sy_rate;                        /* current rate for sync. tr. */
    u32     sy_max_rate;                    /* max. rate for sync. tr. */
    u32     no_ldrive;                      /* belongs to this log. drv.*/
    u32     blkcnt;                         /* number of blocks */
    u16      blksize;                        /* size of block in bytes */
    u8      available;                      /* flag: access is available */
    u8      init;                           /* medium is initialized */
    u8      devtype;                        /* SCSI devicetype */
    u8      rm_medium;                      /* medium is removable */
    u8      wp_medium;                      /* medium is write protected */
    u8      ansi;                           /* SCSI I/II or III? */
    u8      protocol;                       /* same as ansi */
    u8      sync;                           /* flag: sync. transfer enab. */
    u8      disc;                           /* flag: disconnect enabled */
    u8      queueing;                       /* flag: command queing enab. */
    u8      cached;                         /* flag: caching enabled */
    u8      target_id;                      /* target ID of device */
    u8      lun;                            /* LUN id of device */
    u8      orphan;                         /* flag: drive fragment */
    u32     last_error;                     /* sense key or drive state */
    u32     last_result;                    /* result of last command */
    u32     check_errors;                   /* err. in last surface check */
    u8      percent;                        /* progress for surface check */
    u8      last_check;                     /* IOCTRL operation */
    u8      res[2];
    u32     flags;                          /* from 1.19/2.19: raw reserv.*/
    u8      multi_bus;                      /* multi bus dev? (fibre ch.) */
    u8      mb_status;                      /* status: available? */
    u8      res2[2];
    u8      mb_alt_status;                  /* status on second bus */
    u8      mb_alt_bid;                     /* number of second bus */
    u8      mb_alt_tid;                     /* target id on second bus */
    u8      res3;
    u8      fc_flag;                        /* from 1.22/2.22: info valid?*/
    u8      res4;
    u16      fc_frame_size;                  /* frame size (bytes) */
    char        wwn[8];                         /* world wide name */
} __attribute__((packed)) gdth_diskinfo_str;

/* get SCSI channel count  */
typedef struct {
    u32     channel_no;                     /* number of channel */
    u32     drive_cnt;                      /* drive count */
    u8      siop_id;                        /* SCSI processor ID */
    u8      siop_state;                     /* SCSI processor state */ 
} __attribute__((packed)) gdth_getch_str;

/* get SCSI drive numbers */
typedef struct {
    u32     sc_no;                          /* SCSI channel */
    u32     sc_cnt;                         /* sc_list[] elements */
    u32     sc_list[MAXID];                 /* minor device numbers */
} __attribute__((packed)) gdth_drlist_str;

/* get grown/primary defect count */
typedef struct {
    u8      sddc_type;                      /* 0x08: grown, 0x10: prim. */
    u8      sddc_format;                    /* list entry format */
    u8      sddc_len;                       /* list entry length */
    u8      sddc_res;
    u32     sddc_cnt;                       /* entry count */
} __attribute__((packed)) gdth_defcnt_str;

/* disk statistics */
typedef struct {
    u32     bid;                            /* SCSI channel */
    u32     first;                          /* first SCSI disk */
    u32     entries;                        /* number of elements */
    u32     count;                          /* (R) number of init. el. */
    u32     mon_time;                       /* time stamp */
    struct {
        u8  tid;                            /* target ID */
        u8  lun;                            /* LUN */
        u8  res[2];
        u32 blk_size;                       /* block size in bytes */
        u32 rd_count;                       /* bytes read */
        u32 wr_count;                       /* bytes written */
        u32 rd_blk_count;                   /* blocks read */
        u32 wr_blk_count;                   /* blocks written */
        u32 retries;                        /* retries */
        u32 reassigns;                      /* reassigns */
    } __attribute__((packed)) list[1];
} __attribute__((packed)) gdth_dskstat_str;

/* IO channel header */
typedef struct {
    u32     version;                        /* version (-1UL: newest) */
    u8      list_entries;                   /* list entry count */
    u8      first_chan;                     /* first channel number */
    u8      last_chan;                      /* last channel number */
    u8      chan_count;                     /* (R) channel count */
    u32     list_offset;                    /* offset of list[0] */
} __attribute__((packed)) gdth_iochan_header;

/* get IO channel description */
typedef struct {
    gdth_iochan_header  hdr;
    struct {
        u32         address;                /* channel address */
        u8          type;                   /* type (SCSI, FCAL) */
        u8          local_no;               /* local number */
        u16          features;               /* channel features */
    } __attribute__((packed)) list[MAXBUS];
} __attribute__((packed)) gdth_iochan_str;

/* get raw IO channel description */
typedef struct {
    gdth_iochan_header  hdr;
    struct {
        u8      proc_id;                    /* processor id */
        u8      proc_defect;                /* defect ? */
        u8      reserved[2];
    } __attribute__((packed)) list[MAXBUS];
} __attribute__((packed)) gdth_raw_iochan_str;

/* array drive component */
typedef struct {
    u32     al_controller;                  /* controller ID */
    u8      al_cache_drive;                 /* cache drive number */
    u8      al_status;                      /* cache drive state */
    u8      al_res[2];     
} __attribute__((packed)) gdth_arraycomp_str;

/* array drive information */
typedef struct {
    u8      ai_type;                        /* array type (RAID0,4,5) */
    u8      ai_cache_drive_cnt;             /* active cachedrives */
    u8      ai_state;                       /* array drive state */
    u8      ai_master_cd;                   /* master cachedrive */
    u32     ai_master_controller;           /* ID of master controller */
    u32     ai_size;                        /* user capacity [sectors] */
    u32     ai_striping_size;               /* striping size [sectors] */
    u32     ai_secsize;                     /* sector size [bytes] */
    u32     ai_err_info;                    /* failed cache drive */
    u8      ai_name[8];                     /* name of the array drive */
    u8      ai_controller_cnt;              /* number of controllers */
    u8      ai_removable;                   /* flag: removable */
    u8      ai_write_protected;             /* flag: write protected */
    u8      ai_devtype;                     /* type: always direct access */
    gdth_arraycomp_str  ai_drives[35];          /* drive components: */
    u8      ai_drive_entries;               /* number of drive components */
    u8      ai_protected;                   /* protection flag */
    u8      ai_verify_state;                /* state of a parity verify */
    u8      ai_ext_state;                   /* extended array drive state */
    u8      ai_expand_state;                /* array expand state (>=2.18)*/
    u8      ai_reserved[3];
} __attribute__((packed)) gdth_arrayinf_str;

/* get array drive list */
typedef struct {
    u32     controller_no;                  /* controller no. */
    u8      cd_handle;                      /* master cachedrive */
    u8      is_arrayd;                      /* Flag: is array drive? */
    u8      is_master;                      /* Flag: is array master? */
    u8      is_parity;                      /* Flag: is parity drive? */
    u8      is_hotfix;                      /* Flag: is hotfix drive? */
    u8      res[3];
} __attribute__((packed)) gdth_alist_str;

typedef struct {
    u32     entries_avail;                  /* allocated entries */
    u32     entries_init;                   /* returned entries */
    u32     first_entry;                    /* first entry number */
    u32     list_offset;                    /* offset of following list */
    gdth_alist_str list[1];                     /* list */
} __attribute__((packed)) gdth_arcdl_str;

/* cache info/config IOCTL */
typedef struct {
    u32     version;                        /* firmware version */
    u16      state;                          /* cache state (on/off) */
    u16      strategy;                       /* cache strategy */
    u16      write_back;                     /* write back state (on/off) */
    u16      block_size;                     /* cache block size */
} __attribute__((packed)) gdth_cpar_str;

typedef struct {
    u32     csize;                          /* cache size */
    u32     read_cnt;                       /* read/write counter */
    u32     write_cnt;
    u32     tr_hits;                        /* hits */
    u32     sec_hits;
    u32     sec_miss;                       /* misses */
} __attribute__((packed)) gdth_cstat_str;

typedef struct {
    gdth_cpar_str   cpar;
    gdth_cstat_str  cstat;
} __attribute__((packed)) gdth_cinfo_str;

/* cache drive info */
typedef struct {
    u8      cd_name[8];                     /* cache drive name */
    u32     cd_devtype;                     /* SCSI devicetype */
    u32     cd_ldcnt;                       /* number of log. drives */
    u32     cd_last_error;                  /* last error */
    u8      cd_initialized;                 /* drive is initialized */
    u8      cd_removable;                   /* media is removable */
    u8      cd_write_protected;             /* write protected */
    u8      cd_flags;                       /* Pool Hot Fix? */
    u32     ld_blkcnt;                      /* number of blocks */
    u32     ld_blksize;                     /* blocksize */
    u32     ld_dcnt;                        /* number of disks */
    u32     ld_slave;                       /* log. drive index */
    u32     ld_dtype;                       /* type of logical drive */
    u32     ld_last_error;                  /* last error */
    u8      ld_name[8];                     /* log. drive name */
    u8      ld_error;                       /* error */
} __attribute__((packed)) gdth_cdrinfo_str;

/* OEM string */
typedef struct {
    u32     ctl_version;
    u32     file_major_version;
    u32     file_minor_version;
    u32     buffer_size;
    u32     cpy_count;
    u32     ext_error;
    u32     oem_id;
    u32     board_id;
} __attribute__((packed)) gdth_oem_str_params;

typedef struct {
    u8      product_0_1_name[16];
    u8      product_4_5_name[16];
    u8      product_cluster_name[16];
    u8      product_reserved[16];
    u8      scsi_cluster_target_vendor_id[16];
    u8      cluster_raid_fw_name[16];
    u8      oem_brand_name[16];
    u8      oem_raid_type[16];
    u8      bios_type[13];
    u8      bios_title[50];
    u8      oem_company_name[37];
    u32     pci_id_1;
    u32     pci_id_2;
    u8      validation_status[80];
    u8      reserved_1[4];
    u8      scsi_host_drive_inquiry_vendor_id[16];
    u8      library_file_template[16];
    u8      reserved_2[16];
    u8      tool_name_1[32];
    u8      tool_name_2[32];
    u8      tool_name_3[32];
    u8      oem_contact_1[84];
    u8      oem_contact_2[84];
    u8      oem_contact_3[84];
} __attribute__((packed)) gdth_oem_str;

typedef struct {
    gdth_oem_str_params params;
    gdth_oem_str        text;
} __attribute__((packed)) gdth_oem_str_ioctl;

/* board features */
typedef struct {
    u8      chaining;                       /* Chaining supported */
    u8      striping;                       /* Striping (RAID-0) supp. */
    u8      mirroring;                      /* Mirroring (RAID-1) supp. */
    u8      raid;                           /* RAID-4/5/10 supported */
} __attribute__((packed)) gdth_bfeat_str;

/* board info IOCTL */
typedef struct {
    u32     ser_no;                         /* serial no. */
    u8      oem_id[2];                      /* OEM ID */
    u16      ep_flags;                       /* eprom flags */
    u32     proc_id;                        /* processor ID */
    u32     memsize;                        /* memory size (bytes) */
    u8      mem_banks;                      /* memory banks */
    u8      chan_type;                      /* channel type */
    u8      chan_count;                     /* channel count */
    u8      rdongle_pres;                   /* dongle present? */
    u32     epr_fw_ver;                     /* (eprom) firmware version */
    u32     upd_fw_ver;                     /* (update) firmware version */
    u32     upd_revision;                   /* update revision */
    char        type_string[16];                /* controller name */
    char        raid_string[16];                /* RAID firmware name */
    u8      update_pres;                    /* update present? */
    u8      xor_pres;                       /* XOR engine present? */
    u8      prom_type;                      /* ROM type (eprom/flash) */
    u8      prom_count;                     /* number of ROM devices */
    u32     dup_pres;                       /* duplexing module present? */
    u32     chan_pres;                      /* number of expansion chn. */
    u32     mem_pres;                       /* memory expansion inst. ? */
    u8      ft_bus_system;                  /* fault bus supported? */
    u8      subtype_valid;                  /* board_subtype valid? */
    u8      board_subtype;                  /* subtype/hardware level */
    u8      ramparity_pres;                 /* RAM parity check hardware? */
} __attribute__((packed)) gdth_binfo_str; 

/* get host drive info */
typedef struct {
    char        name[8];                        /* host drive name */
    u32     size;                           /* size (sectors) */
    u8      host_drive;                     /* host drive number */
    u8      log_drive;                      /* log. drive (master) */
    u8      reserved;
    u8      rw_attribs;                     /* r/w attribs */
    u32     start_sec;                      /* start sector */
} __attribute__((packed)) gdth_hentry_str;

typedef struct {
    u32     entries;                        /* entry count */
    u32     offset;                         /* offset of entries */
    u8      secs_p_head;                    /* sectors/head */
    u8      heads_p_cyl;                    /* heads/cylinder */
    u8      reserved;
    u8      clust_drvtype;                  /* cluster drive type */
    u32     location;                       /* controller number */
    gdth_hentry_str entry[MAX_HDRIVES];         /* entries */
} __attribute__((packed)) gdth_hget_str;    


/* DPRAM structures */

/* interface area ISA/PCI */
typedef struct {
    u8              S_Cmd_Indx;             /* special command */
    u8 volatile     S_Status;               /* status special command */
    u16              reserved1;
    u32             S_Info[4];              /* add. info special command */
    u8 volatile     Sema0;                  /* command semaphore */
    u8              reserved2[3];
    u8              Cmd_Index;              /* command number */
    u8              reserved3[3];
    u16 volatile     Status;                 /* command status */
    u16              Service;                /* service(for async.events) */
    u32             Info[2];                /* additional info */
    struct {
        u16          offset;                 /* command offs. in the DPRAM*/
        u16          serv_id;                /* service */
    } __attribute__((packed)) comm_queue[MAXOFFSETS];            /* command queue */
    u32             bios_reserved[2];
    u8              gdt_dpr_cmd[1];         /* commands */
} __attribute__((packed)) gdt_dpr_if;

/* SRAM structure PCI controllers */
typedef struct {
    u32     magic;                          /* controller ID from BIOS */
    u16      need_deinit;                    /* switch betw. BIOS/driver */
    u8      switch_support;                 /* see need_deinit */
    u8      padding[9];
    u8      os_used[16];                    /* OS code per service */
    u8      unused[28];
    u8      fw_magic;                       /* contr. ID from firmware */
} __attribute__((packed)) gdt_pci_sram;

/* SRAM structure EISA controllers (but NOT GDT3000/3020) */
typedef struct {
    u8      os_used[16];                    /* OS code per service */
    u16      need_deinit;                    /* switch betw. BIOS/driver */
    u8      switch_support;                 /* see need_deinit */
    u8      padding;
} __attribute__((packed)) gdt_eisa_sram;


/* DPRAM ISA controllers */
typedef struct {
    union {
        struct {
            u8      bios_used[0x3c00-32];   /* 15KB - 32Bytes BIOS */
            u32     magic;                  /* controller (EISA) ID */
            u16      need_deinit;            /* switch betw. BIOS/driver */
            u8      switch_support;         /* see need_deinit */
            u8      padding[9];
            u8      os_used[16];            /* OS code per service */
        } __attribute__((packed)) dp_sram;
        u8          bios_area[0x4000];      /* 16KB reserved for BIOS */
    } bu;
    union {
        gdt_dpr_if      ic;                     /* interface area */
        u8          if_area[0x3000];        /* 12KB for interface */
    } u;
    struct {
        u8          memlock;                /* write protection DPRAM */
        u8          event;                  /* release event */
        u8          irqen;                  /* board interrupts enable */
        u8          irqdel;                 /* acknowledge board int. */
        u8 volatile Sema1;                  /* status semaphore */
        u8          rq;                     /* IRQ/DRQ configuration */
    } __attribute__((packed)) io;
} __attribute__((packed)) gdt2_dpram_str;

/* DPRAM PCI controllers */
typedef struct {
    union {
        gdt_dpr_if      ic;                     /* interface area */
        u8          if_area[0xff0-sizeof(gdt_pci_sram)];
    } u;
    gdt_pci_sram        gdt6sr;                 /* SRAM structure */
    struct {
        u8          unused0[1];
        u8 volatile Sema1;                  /* command semaphore */
        u8          unused1[3];
        u8          irqen;                  /* board interrupts enable */
        u8          unused2[2];
        u8          event;                  /* release event */
        u8          unused3[3];
        u8          irqdel;                 /* acknowledge board int. */
        u8          unused4[3];
    } __attribute__((packed)) io;
} __attribute__((packed)) gdt6_dpram_str;

/* PLX register structure (new PCI controllers) */
typedef struct {
    u8              cfg_reg;        /* DPRAM cfg.(2:below 1MB,0:anywhere)*/
    u8              unused1[0x3f];
    u8 volatile     sema0_reg;              /* command semaphore */
    u8 volatile     sema1_reg;              /* status semaphore */
    u8              unused2[2];
    u16 volatile     status;                 /* command status */
    u16              service;                /* service */
    u32             info[2];                /* additional info */
    u8              unused3[0x10];
    u8              ldoor_reg;              /* PCI to local doorbell */
    u8              unused4[3];
    u8 volatile     edoor_reg;              /* local to PCI doorbell */
    u8              unused5[3];
    u8              control0;               /* control0 register(unused) */
    u8              control1;               /* board interrupts enable */
    u8              unused6[0x16];
} __attribute__((packed)) gdt6c_plx_regs;

/* DPRAM new PCI controllers */
typedef struct {
    union {
        gdt_dpr_if      ic;                     /* interface area */
        u8          if_area[0x4000-sizeof(gdt_pci_sram)];
    } u;
    gdt_pci_sram        gdt6sr;                 /* SRAM structure */
} __attribute__((packed)) gdt6c_dpram_str;

/* i960 register structure (PCI MPR controllers) */
typedef struct {
    u8              unused1[16];
    u8 volatile     sema0_reg;              /* command semaphore */
    u8              unused2;
    u8 volatile     sema1_reg;              /* status semaphore */
    u8              unused3;
    u16 volatile     status;                 /* command status */
    u16              service;                /* service */
    u32             info[2];                /* additional info */
    u8              ldoor_reg;              /* PCI to local doorbell */
    u8              unused4[11];
    u8 volatile     edoor_reg;              /* local to PCI doorbell */
    u8              unused5[7];
    u8              edoor_en_reg;           /* board interrupts enable */
    u8              unused6[27];
    u32             unused7[939];         
    u32             severity;       
    char                evt_str[256];           /* event string */
} __attribute__((packed)) gdt6m_i960_regs;

/* DPRAM PCI MPR controllers */
typedef struct {
    gdt6m_i960_regs     i960r;                  /* 4KB i960 registers */
    union {
        gdt_dpr_if      ic;                     /* interface area */
        u8          if_area[0x3000-sizeof(gdt_pci_sram)];
    } u;
    gdt_pci_sram        gdt6sr;                 /* SRAM structure */
} __attribute__((packed)) gdt6m_dpram_str;


/* PCI resources */
typedef struct {
    struct pci_dev      *pdev;
    unsigned long               dpmem;                  /* DPRAM address */
    unsigned long               io;                     /* IO address */
} gdth_pci_str;


/* controller information structure */
typedef struct {
    struct Scsi_Host    *shost;
    struct list_head    list;
    u16      	hanum;
    u16              oem_id;                 /* OEM */
    u16              type;                   /* controller class */
    u32             stype;                  /* subtype (PCI: device ID) */
    u16              fw_vers;                /* firmware version */
    u16              cache_feat;             /* feat. cache serv. (s/g,..)*/
    u16              raw_feat;               /* feat. raw service (s/g,..)*/
    u16              screen_feat;            /* feat. raw service (s/g,..)*/
    u16              bmic;                   /* BMIC address (EISA) */
    void __iomem        *brd;                   /* DPRAM address */
    u32             brd_phys;               /* slot number/BIOS address */
    gdt6c_plx_regs      *plx;                   /* PLX regs (new PCI contr.) */
    gdth_cmd_str        cmdext;
    gdth_cmd_str        *pccb;                  /* address command structure */
    u32             ccb_phys;               /* phys. address */
#ifdef INT_COAL
    gdth_coal_status    *coal_stat;             /* buffer for coalescing int.*/
    u64             coal_stat_phys;         /* phys. address */
#endif
    char                *pscratch;              /* scratch (DMA) buffer */
    u64             scratch_phys;           /* phys. address */
    u8              scratch_busy;           /* in use? */
    u8              dma64_support;          /* 64-bit DMA supported? */
    gdth_msg_str        *pmsg;                  /* message buffer */
    u64             msg_phys;               /* phys. address */
    u8              scan_mode;              /* current scan mode */
    u8              irq;                    /* IRQ */
    u8              drq;                    /* DRQ (ISA controllers) */
    u16              status;                 /* command status */
    u16              service;                /* service/firmware ver./.. */
    u32             info;
    u32             info2;                  /* additional info */
    Scsi_Cmnd           *req_first;             /* top of request queue */
    struct {
        u8          present;                /* Flag: host drive present? */
        u8          is_logdrv;              /* Flag: log. drive (master)? */
        u8          is_arraydrv;            /* Flag: array drive? */
        u8          is_master;              /* Flag: array drive master? */
        u8          is_parity;              /* Flag: parity drive? */
        u8          is_hotfix;              /* Flag: hotfix drive? */
        u8          master_no;              /* number of master drive */
        u8          lock;                   /* drive locked? (hot plug) */
        u8          heads;                  /* mapping */
        u8          secs;
        u16          devtype;                /* further information */
        u64         size;                   /* capacity */
        u8          ldr_no;                 /* log. drive no. */
        u8          rw_attribs;             /* r/w attributes */
        u8          cluster_type;           /* cluster properties */
        u8          media_changed;          /* Flag:MOUNT/UNMOUNT occurred */
        u32         start_sec;              /* start sector */
    } hdr[MAX_LDRIVES];                         /* host drives */
    struct {
        u8          lock;                   /* channel locked? (hot plug) */
        u8          pdev_cnt;               /* physical device count */
        u8          local_no;               /* local channel number */
        u8          io_cnt[MAXID];          /* current IO count */
        u32         address;                /* channel address */
        u32         id_list[MAXID];         /* IDs of the phys. devices */
    } raw[MAXBUS];                              /* SCSI channels */
    struct {
        Scsi_Cmnd       *cmnd;                  /* pending request */
        u16          service;                /* service */
    } cmd_tab[GDTH_MAXCMDS];                    /* table of pend. requests */
    struct gdth_cmndinfo {                      /* per-command private info */
        int index;
        int internal_command;                   /* don't call scsi_done */
        gdth_cmd_str *internal_cmd_str;         /* crier for internal messages*/
        dma_addr_t sense_paddr;                 /* sense dma-addr */
        u8 priority;
	int timeout_count;			/* # of timeout calls */
        volatile int wait_for_completion;
        u16 status;
        u32 info;
        enum dma_data_direction dma_dir;
        int phase;                              /* ???? */
        int OpCode;
    } cmndinfo[GDTH_MAXCMDS];                   /* index==0 is free */
    u8              bus_cnt;                /* SCSI bus count */
    u8              tid_cnt;                /* Target ID count */
    u8              bus_id[MAXBUS];         /* IOP IDs */
    u8              virt_bus;               /* number of virtual bus */
    u8              more_proc;              /* more /proc info supported */
    u16              cmd_cnt;                /* command count in DPRAM */
    u16              cmd_len;                /* length of actual command */
    u16              cmd_offs_dpmem;         /* actual offset in DPRAM */
    u16              ic_all_size;            /* sizeof DPRAM interf. area */
    gdth_cpar_str       cpar;                   /* controller cache par. */
    gdth_bfeat_str      bfeat;                  /* controller features */
    gdth_binfo_str      binfo;                  /* controller info */
    gdth_evt_data       dvr;                    /* event structure */
    spinlock_t          smp_lock;
    struct pci_dev      *pdev;
    char                oem_name[8];
#ifdef GDTH_DMA_STATISTICS
    unsigned long               dma32_cnt, dma64_cnt;   /* statistics: DMA buffer */
#endif
    struct scsi_device         *sdev;
} gdth_ha_str;

static inline struct gdth_cmndinfo *gdth_cmnd_priv(struct scsi_cmnd* cmd)
{
	return (struct gdth_cmndinfo *)cmd->host_scribble;
}

/* INQUIRY data format */
typedef struct {
    u8      type_qual;
    u8      modif_rmb;
    u8      version;
    u8      resp_aenc;
    u8      add_length;
    u8      reserved1;
    u8      reserved2;
    u8      misc;
    u8      vendor[8];
    u8      product[16];
    u8      revision[4];
} __attribute__((packed)) gdth_inq_data;

/* READ_CAPACITY data format */
typedef struct {
    u32     last_block_no;
    u32     block_length;
} __attribute__((packed)) gdth_rdcap_data;

/* READ_CAPACITY (16) data format */
typedef struct {
    u64     last_block_no;
    u32     block_length;
} __attribute__((packed)) gdth_rdcap16_data;

/* REQUEST_SENSE data format */
typedef struct {
    u8      errorcode;
    u8      segno;
    u8      key;
    u32     info;
    u8      add_length;
    u32     cmd_info;
    u8      adsc;
    u8      adsq;
    u8      fruc;
    u8      key_spec[3];
} __attribute__((packed)) gdth_sense_data;

/* MODE_SENSE data format */
typedef struct {
    struct {
        u8  data_length;
        u8  med_type;
        u8  dev_par;
        u8  bd_length;
    } __attribute__((packed)) hd;
    struct {
        u8  dens_code;
        u8  block_count[3];
        u8  reserved;
        u8  block_length[3];
    } __attribute__((packed)) bd;
} __attribute__((packed)) gdth_modep_data;

/* stack frame */
typedef struct {
    unsigned long       b[10];                          /* 32/64 bit compiler ! */
} __attribute__((packed)) gdth_stackframe;


/* function prototyping */

int gdth_proc_info(struct Scsi_Host *, char *,char **,off_t,int,int);

#endif