aboutsummaryrefslogtreecommitdiffstats
path: root/drivers/scsi/pmcraid.h
blob: 1134279604e805780f84607c523bbdd647685f24 (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
/*
 * pmcraid.h -- PMC Sierra MaxRAID controller driver header file
 *
 * Written By: Anil Ravindranath<anil_ravindranath@pmc-sierra.com>
 *             PMC-Sierra Inc
 *
 * Copyright (C) 2008, 2009 PMC Sierra 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.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 */

#ifndef _PMCRAID_H
#define _PMCRAID_H

#include <linux/version.h>
#include <linux/types.h>
#include <linux/completion.h>
#include <linux/list.h>
#include <scsi/scsi.h>
#include <scsi/scsi_cmnd.h>
#include <linux/cdev.h>
#include <net/netlink.h>
#include <net/genetlink.h>
#include <linux/connector.h>
/*
 * Driver name   : string representing the driver name
 * Device file   : /dev file to be used for management interfaces
 * Driver version: version string in major_version.minor_version.patch format
 * Driver date   : date information in "Mon dd yyyy" format
 */
#define PMCRAID_DRIVER_NAME		"PMC MaxRAID"
#define PMCRAID_DEVFILE			"pmcsas"
#define PMCRAID_DRIVER_VERSION		"2.0.3"
#define PMCRAID_DRIVER_DATE		__DATE__

#define PMCRAID_FW_VERSION_1		0x002

/* Maximum number of adapters supported by current version of the driver */
#define PMCRAID_MAX_ADAPTERS		1024

/* Bit definitions as per firmware, bit position [0][1][2].....[31] */
#define PMC_BIT8(n)          (1 << (7-n))
#define PMC_BIT16(n)         (1 << (15-n))
#define PMC_BIT32(n)         (1 << (31-n))

/* PMC PCI vendor ID and device ID values */
#define PCI_VENDOR_ID_PMC			0x11F8
#define PCI_DEVICE_ID_PMC_MAXRAID		0x5220

/*
 * MAX_CMD          : maximum commands that can be outstanding with IOA
 * MAX_IO_CMD       : command blocks available for IO commands
 * MAX_HCAM_CMD     : command blocks avaibale for HCAMS
 * MAX_INTERNAL_CMD : command blocks avaible for internal commands like reset
 */
#define PMCRAID_MAX_CMD				1024
#define PMCRAID_MAX_IO_CMD			1020
#define PMCRAID_MAX_HCAM_CMD			2
#define PMCRAID_MAX_INTERNAL_CMD		2

/* MAX_IOADLS       : max number of scatter-gather lists supported by IOA
 * IOADLS_INTERNAL  : number of ioadls included as part of IOARCB.
 * IOADLS_EXTERNAL  : number of ioadls allocated external to IOARCB
 */
#define PMCRAID_IOADLS_INTERNAL			 27
#define PMCRAID_IOADLS_EXTERNAL			 37
#define PMCRAID_MAX_IOADLS			 PMCRAID_IOADLS_INTERNAL

/* HRRQ_ENTRY_SIZE  : size of hrrq buffer
 * IOARCB_ALIGNMENT : alignment required for IOARCB
 * IOADL_ALIGNMENT  : alignment requirement for IOADLs
 * MSIX_VECTORS     : number of MSIX vectors supported
 */
#define HRRQ_ENTRY_SIZE                          sizeof(__le32)
#define PMCRAID_IOARCB_ALIGNMENT                 32
#define PMCRAID_IOADL_ALIGNMENT                  16
#define PMCRAID_IOASA_ALIGNMENT                  4
#define PMCRAID_NUM_MSIX_VECTORS                 16

/* various other limits */
#define PMCRAID_VENDOR_ID_LEN			8
#define PMCRAID_PRODUCT_ID_LEN			16
#define PMCRAID_SERIAL_NUM_LEN			8
#define PMCRAID_LUN_LEN				8
#define PMCRAID_MAX_CDB_LEN			16
#define PMCRAID_DEVICE_ID_LEN			8
#define PMCRAID_SENSE_DATA_LEN			256
#define PMCRAID_ADD_CMD_PARAM_LEN		48

#define PMCRAID_MAX_BUS_TO_SCAN                  1
#define PMCRAID_MAX_NUM_TARGETS_PER_BUS          256
#define PMCRAID_MAX_NUM_LUNS_PER_TARGET          8

/* IOA bus/target/lun number of IOA resources */
#define PMCRAID_IOA_BUS_ID                       0xfe
#define PMCRAID_IOA_TARGET_ID                    0xff
#define PMCRAID_IOA_LUN_ID                       0xff
#define PMCRAID_VSET_BUS_ID                      0x1
#define PMCRAID_VSET_LUN_ID                      0x0
#define PMCRAID_PHYS_BUS_ID                      0x0
#define PMCRAID_VIRTUAL_ENCL_BUS_ID              0x8
#define PMCRAID_MAX_VSET_TARGETS                 0x7F
#define PMCRAID_MAX_VSET_LUNS_PER_TARGET         8

#define PMCRAID_IOA_MAX_SECTORS                  32767
#define PMCRAID_VSET_MAX_SECTORS                 512
#define PMCRAID_MAX_CMD_PER_LUN                  254

/* Number of configuration table entries (resources), includes 1 FP,
 * 1 Enclosure device
 */
#define PMCRAID_MAX_RESOURCES                    256

/* Adapter Commands used by driver */
#define PMCRAID_QUERY_RESOURCE_STATE             0xC2
#define PMCRAID_RESET_DEVICE                     0xC3
/* options to select reset target */
#define ENABLE_RESET_MODIFIER                    0x80
#define RESET_DEVICE_LUN                         0x40
#define RESET_DEVICE_TARGET                      0x20
#define RESET_DEVICE_BUS                         0x10

#define PMCRAID_IDENTIFY_HRRQ                    0xC4
#define PMCRAID_QUERY_IOA_CONFIG                 0xC5
#define PMCRAID_QUERY_CMD_STATUS		 0xCB
#define PMCRAID_ABORT_CMD                        0xC7

/* CANCEL ALL command, provides option for setting SYNC_COMPLETE
 * on the target resources for which commands got cancelled
 */
#define PMCRAID_CANCEL_ALL_REQUESTS		 0xCE
#define PMCRAID_SYNC_COMPLETE_AFTER_CANCEL       PMC_BIT8(0)

/* HCAM command and types of HCAM supported by IOA */
#define PMCRAID_HOST_CONTROLLED_ASYNC            0xCF
#define PMCRAID_HCAM_CODE_CONFIG_CHANGE          0x01
#define PMCRAID_HCAM_CODE_LOG_DATA               0x02

/* IOA shutdown command and various shutdown types */
#define PMCRAID_IOA_SHUTDOWN                     0xF7
#define PMCRAID_SHUTDOWN_NORMAL                  0x00
#define PMCRAID_SHUTDOWN_PREPARE_FOR_NORMAL      0x40
#define PMCRAID_SHUTDOWN_NONE                    0x100
#define PMCRAID_SHUTDOWN_ABBREV                  0x80

/* SET SUPPORTED DEVICES command and the option to select all the
 * devices to be supported
 */
#define PMCRAID_SET_SUPPORTED_DEVICES            0xFB
#define ALL_DEVICES_SUPPORTED                    PMC_BIT8(0)

/* This option is used with SCSI WRITE_BUFFER command */
#define PMCRAID_WR_BUF_DOWNLOAD_AND_SAVE         0x05

/* IOASC Codes used by driver */
#define PMCRAID_IOASC_SENSE_MASK                 0xFFFFFF00
#define PMCRAID_IOASC_SENSE_KEY(ioasc)           ((ioasc) >> 24)
#define PMCRAID_IOASC_SENSE_CODE(ioasc)          (((ioasc) & 0x00ff0000) >> 16)
#define PMCRAID_IOASC_SENSE_QUAL(ioasc)          (((ioasc) & 0x0000ff00) >> 8)
#define PMCRAID_IOASC_SENSE_STATUS(ioasc)        ((ioasc) & 0x000000ff)

#define PMCRAID_IOASC_GOOD_COMPLETION			0x00000000
#define PMCRAID_IOASC_GC_IOARCB_NOTFOUND		0x005A0000
#define PMCRAID_IOASC_NR_INIT_CMD_REQUIRED		0x02040200
#define PMCRAID_IOASC_NR_IOA_RESET_REQUIRED		0x02048000
#define PMCRAID_IOASC_NR_SYNC_REQUIRED			0x023F0000
#define PMCRAID_IOASC_ME_READ_ERROR_NO_REALLOC		0x03110C00
#define PMCRAID_IOASC_HW_CANNOT_COMMUNICATE		0x04050000
#define PMCRAID_IOASC_HW_DEVICE_TIMEOUT			0x04080100
#define PMCRAID_IOASC_HW_DEVICE_BUS_STATUS_ERROR	0x04448500
#define PMCRAID_IOASC_HW_IOA_RESET_REQUIRED		0x04448600
#define PMCRAID_IOASC_IR_INVALID_RESOURCE_HANDLE        0x05250000
#define PMCRAID_IOASC_AC_TERMINATED_BY_HOST		0x0B5A0000
#define PMCRAID_IOASC_UA_BUS_WAS_RESET			0x06290000
#define PMCRAID_IOASC_TIME_STAMP_OUT_OF_SYNC		0x06908B00
#define PMCRAID_IOASC_UA_BUS_WAS_RESET_BY_OTHER		0x06298000

/* Driver defined IOASCs */
#define PMCRAID_IOASC_IOA_WAS_RESET			0x10000001
#define PMCRAID_IOASC_PCI_ACCESS_ERROR			0x10000002

/* Various timeout values (in milliseconds) used. If any of these are chip
 * specific, move them to pmcraid_chip_details structure.
 */
#define PMCRAID_PCI_DEASSERT_TIMEOUT		2000
#define PMCRAID_BIST_TIMEOUT			2000
#define PMCRAID_AENWAIT_TIMEOUT			5000
#define PMCRAID_TRANSOP_TIMEOUT			60000

#define PMCRAID_RESET_TIMEOUT			(2 * HZ)
#define PMCRAID_CHECK_FOR_RESET_TIMEOUT		((HZ / 10))
#define PMCRAID_VSET_IO_TIMEOUT			(60 * HZ)
#define PMCRAID_INTERNAL_TIMEOUT		(60 * HZ)
#define PMCRAID_SHUTDOWN_TIMEOUT		(150 * HZ)
#define PMCRAID_RESET_BUS_TIMEOUT		(60 * HZ)
#define PMCRAID_RESET_HOST_TIMEOUT		(150 * HZ)
#define PMCRAID_REQUEST_SENSE_TIMEOUT		(30 * HZ)
#define PMCRAID_SET_SUP_DEV_TIMEOUT		(2 * 60 * HZ)

/* structure to represent a scatter-gather element (IOADL descriptor) */
struct pmcraid_ioadl_desc {
	__le64 address;
	__le32 data_len;
	__u8  reserved[3];
	__u8  flags;
} __attribute__((packed, aligned(PMCRAID_IOADL_ALIGNMENT)));

/* pmcraid_ioadl_desc.flags values */
#define IOADL_FLAGS_CHAINED      PMC_BIT8(0)
#define IOADL_FLAGS_LAST_DESC    PMC_BIT8(1)
#define IOADL_FLAGS_READ_LAST    PMC_BIT8(1)
#define IOADL_FLAGS_WRITE_LAST   PMC_BIT8(1)


/* additional IOARCB data which can be CDB or additional request parameters
 * or list of IOADLs. Firmware supports max of 512 bytes for IOARCB, hence then
 * number of IOADLs are limted to 27. In case they are more than 27, they will
 * be used in chained form
 */
struct pmcraid_ioarcb_add_data {
	union {
		struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_INTERNAL];
		__u8 add_cmd_params[PMCRAID_ADD_CMD_PARAM_LEN];
	} u;
};

/*
 * IOA Request Control Block
 */
struct pmcraid_ioarcb {
	__le64 ioarcb_bus_addr;
	__le32 resource_handle;
	__le32 response_handle;
	__le64 ioadl_bus_addr;
	__le32 ioadl_length;
	__le32 data_transfer_length;
	__le64 ioasa_bus_addr;
	__le16 ioasa_len;
	__le16 cmd_timeout;
	__le16 add_cmd_param_offset;
	__le16 add_cmd_param_length;
	__le32 reserved1[2];
	__le32 reserved2;
	__u8  request_type;
	__u8  request_flags0;
	__u8  request_flags1;
	__u8  hrrq_id;
	__u8  cdb[PMCRAID_MAX_CDB_LEN];
	struct pmcraid_ioarcb_add_data add_data;
} __attribute__((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));

/* well known resource handle values */
#define PMCRAID_IOA_RES_HANDLE        0xffffffff
#define PMCRAID_INVALID_RES_HANDLE    0

/* pmcraid_ioarcb.request_type values */
#define REQ_TYPE_SCSI                 0x00
#define REQ_TYPE_IOACMD               0x01
#define REQ_TYPE_HCAM                 0x02

/* pmcraid_ioarcb.flags0 values */
#define TRANSFER_DIR_WRITE            PMC_BIT8(0)
#define INHIBIT_UL_CHECK              PMC_BIT8(2)
#define SYNC_OVERRIDE                 PMC_BIT8(3)
#define SYNC_COMPLETE                 PMC_BIT8(4)
#define NO_LINK_DESCS                 PMC_BIT8(5)

/* pmcraid_ioarcb.flags1 values */
#define DELAY_AFTER_RESET             PMC_BIT8(0)
#define TASK_TAG_SIMPLE               0x10
#define TASK_TAG_ORDERED              0x20
#define TASK_TAG_QUEUE_HEAD           0x30

/* toggle bit offset in response handle */
#define HRRQ_TOGGLE_BIT               0x01
#define HRRQ_RESPONSE_BIT             0x02

/* IOA Status Area */
struct pmcraid_ioasa_vset {
	__le32 failing_lba_hi;
	__le32 failing_lba_lo;
	__le32 reserved;
} __attribute__((packed, aligned(4)));

struct pmcraid_ioasa {
	__le32 ioasc;
	__le16 returned_status_length;
	__le16 available_status_length;
	__le32 residual_data_length;
	__le32 ilid;
	__le32 fd_ioasc;
	__le32 fd_res_address;
	__le32 fd_res_handle;
	__le32 reserved;

	/* resource specific sense information */
	union {
		struct pmcraid_ioasa_vset vset;
	} u;

	/* IOA autosense data */
	__le16 auto_sense_length;
	__le16 error_data_length;
	__u8  sense_data[PMCRAID_SENSE_DATA_LEN];
} __attribute__((packed, aligned(4)));

#define PMCRAID_DRIVER_ILID           0xffffffff

/* Config Table Entry per Resource */
struct pmcraid_config_table_entry {
	__u8  resource_type;
	__u8  bus_protocol;
	__le16 array_id;
	__u8  common_flags0;
	__u8  common_flags1;
	__u8  unique_flags0;
	__u8  unique_flags1;	/*also used as vset target_id */
	__le32 resource_handle;
	__le32 resource_address;
	__u8  device_id[PMCRAID_DEVICE_ID_LEN];
	__u8  lun[PMCRAID_LUN_LEN];
} __attribute__((packed, aligned(4)));

/* extended configuration table sizes are of 64 bytes in size */
#define PMCRAID_CFGTE_EXT_SIZE	32
struct pmcraid_config_table_entry_ext {
	struct pmcraid_config_table_entry cfgte;
	__u8  cfgte_ext[PMCRAID_CFGTE_EXT_SIZE];
};

/* resource types (config_table_entry.resource_type values) */
#define RES_TYPE_AF_DASD     0x00
#define RES_TYPE_GSCSI       0x01
#define RES_TYPE_VSET        0x02
#define RES_TYPE_IOA_FP      0xFF

#define RES_IS_IOA(res)      ((res).resource_type == RES_TYPE_IOA_FP)
#define RES_IS_GSCSI(res)    ((res).resource_type == RES_TYPE_GSCSI)
#define RES_IS_VSET(res)     ((res).resource_type == RES_TYPE_VSET)
#define RES_IS_AFDASD(res)   ((res).resource_type == RES_TYPE_AF_DASD)

/* bus_protocol values used by driver */
#define RES_TYPE_VENCLOSURE  0x8

/* config_table_entry.common_flags0 */
#define MULTIPATH_RESOURCE   PMC_BIT32(0)

/* unique_flags1 */
#define IMPORT_MODE_MANUAL   PMC_BIT8(0)

/* well known resource handle values */
#define RES_HANDLE_IOA       0xFFFFFFFF
#define RES_HANDLE_NONE      0x00000000

/* well known resource address values */
#define RES_ADDRESS_IOAFP    0xFEFFFFFF
#define RES_ADDRESS_INVALID  0xFFFFFFFF

/* BUS/TARGET/LUN values from resource_addrr */
#define RES_BUS(res_addr)    (le32_to_cpu(res_addr) & 0xFF)
#define RES_TARGET(res_addr) ((le32_to_cpu(res_addr) >> 16) & 0xFF)
#define RES_LUN(res_addr)    0x0

/* configuration table structure */
struct pmcraid_config_table {
	__le16 num_entries;
	__u8  table_format;
	__u8  reserved1;
	__u8  flags;
	__u8  reserved2[11];
	union {
		struct pmcraid_config_table_entry
				entries[PMCRAID_MAX_RESOURCES];
		struct pmcraid_config_table_entry_ext
				entries_ext[PMCRAID_MAX_RESOURCES];
	};
} __attribute__((packed, aligned(4)));

/* config_table.flags value */
#define MICROCODE_UPDATE_REQUIRED		PMC_BIT32(0)

/*
 * HCAM format
 */
#define PMCRAID_HOSTRCB_LDNSIZE			4056

/* Error log notification format */
struct pmcraid_hostrcb_error {
	__le32 fd_ioasc;
	__le32 fd_ra;
	__le32 fd_rh;
	__le32 prc;
	union {
		__u8 data[PMCRAID_HOSTRCB_LDNSIZE];
	} u;
} __attribute__ ((packed, aligned(4)));

struct pmcraid_hcam_hdr {
	__u8  op_code;
	__u8  notification_type;
	__u8  notification_lost;
	__u8  flags;
	__u8  overlay_id;
	__u8  reserved1[3];
	__le32 ilid;
	__le32 timestamp1;
	__le32 timestamp2;
	__le32 data_len;
} __attribute__((packed, aligned(4)));

#define PMCRAID_AEN_GROUP	0x3

struct pmcraid_hcam_ccn {
	struct pmcraid_hcam_hdr header;
	struct pmcraid_config_table_entry cfg_entry;
	struct pmcraid_config_table_entry cfg_entry_old;
} __attribute__((packed, aligned(4)));

#define PMCRAID_CCN_EXT_SIZE	3944
struct pmcraid_hcam_ccn_ext {
	struct pmcraid_hcam_hdr header;
	struct pmcraid_config_table_entry_ext cfg_entry;
	struct pmcraid_config_table_entry_ext cfg_entry_old;
	__u8   reserved[PMCRAID_CCN_EXT_SIZE];
} __attribute__((packed, aligned(4)));

struct pmcraid_hcam_ldn {
	struct pmcraid_hcam_hdr header;
	struct pmcraid_hostrcb_error error_log;
} __attribute__((packed, aligned(4)));

/* pmcraid_hcam.op_code values */
#define HOSTRCB_TYPE_CCN			0xE1
#define HOSTRCB_TYPE_LDN			0xE2

/* pmcraid_hcam.notification_type values */
#define NOTIFICATION_TYPE_ENTRY_CHANGED		0x0
#define NOTIFICATION_TYPE_ENTRY_NEW		0x1
#define NOTIFICATION_TYPE_ENTRY_DELETED		0x2
#define NOTIFICATION_TYPE_STATE_CHANGE		0x3
#define NOTIFICATION_TYPE_ENTRY_STATECHANGED	0x4
#define NOTIFICATION_TYPE_ERROR_LOG		0x10
#define NOTIFICATION_TYPE_INFORMATION_LOG	0x11

#define HOSTRCB_NOTIFICATIONS_LOST		PMC_BIT8(0)

/* pmcraid_hcam.flags values */
#define HOSTRCB_INTERNAL_OP_ERROR		PMC_BIT8(0)
#define HOSTRCB_ERROR_RESPONSE_SENT		PMC_BIT8(1)

/* pmcraid_hcam.overlay_id values */
#define HOSTRCB_OVERLAY_ID_08			0x08
#define HOSTRCB_OVERLAY_ID_09			0x09
#define HOSTRCB_OVERLAY_ID_11			0x11
#define HOSTRCB_OVERLAY_ID_12			0x12
#define HOSTRCB_OVERLAY_ID_13			0x13
#define HOSTRCB_OVERLAY_ID_14			0x14
#define HOSTRCB_OVERLAY_ID_16			0x16
#define HOSTRCB_OVERLAY_ID_17			0x17
#define HOSTRCB_OVERLAY_ID_20			0x20
#define HOSTRCB_OVERLAY_ID_FF			0xFF

/* Implementation specific card details */
struct pmcraid_chip_details {
	/* hardware register offsets */
	unsigned long  ioastatus;
	unsigned long  ioarrin;
	unsigned long  mailbox;
	unsigned long  global_intr_mask;
	unsigned long  ioa_host_intr;
	unsigned long  ioa_host_msix_intr;
	unsigned long  ioa_host_intr_clr;
	unsigned long  ioa_host_mask;
	unsigned long  ioa_host_mask_clr;
	unsigned long  host_ioa_intr;
	unsigned long  host_ioa_intr_clr;

	/* timeout used during transitional to operational state */
	unsigned long transop_timeout;
};

/* IOA to HOST doorbells (interrupts) */
#define INTRS_TRANSITION_TO_OPERATIONAL		PMC_BIT32(0)
#define INTRS_IOARCB_TRANSFER_FAILED		PMC_BIT32(3)
#define INTRS_IOA_UNIT_CHECK			PMC_BIT32(4)
#define INTRS_NO_HRRQ_FOR_CMD_RESPONSE		PMC_BIT32(5)
#define INTRS_CRITICAL_OP_IN_PROGRESS		PMC_BIT32(6)
#define INTRS_IO_DEBUG_ACK			PMC_BIT32(7)
#define INTRS_IOARRIN_LOST			PMC_BIT32(27)
#define INTRS_SYSTEM_BUS_MMIO_ERROR		PMC_BIT32(28)
#define INTRS_IOA_PROCESSOR_ERROR		PMC_BIT32(29)
#define INTRS_HRRQ_VALID			PMC_BIT32(30)
#define INTRS_OPERATIONAL_STATUS		PMC_BIT32(0)
#define INTRS_ALLOW_MSIX_VECTOR0		PMC_BIT32(31)

/* Host to IOA Doorbells */
#define DOORBELL_RUNTIME_RESET			PMC_BIT32(1)
#define DOORBELL_IOA_RESET_ALERT		PMC_BIT32(7)
#define DOORBELL_IOA_DEBUG_ALERT		PMC_BIT32(9)
#define DOORBELL_ENABLE_DESTRUCTIVE_DIAGS	PMC_BIT32(8)
#define DOORBELL_IOA_START_BIST			PMC_BIT32(23)
#define DOORBELL_INTR_MODE_MSIX			PMC_BIT32(25)
#define DOORBELL_INTR_MSIX_CLR			PMC_BIT32(26)
#define DOORBELL_RESET_IOA			PMC_BIT32(31)

/* Global interrupt mask register value */
#define GLOBAL_INTERRUPT_MASK			0x5ULL

#define PMCRAID_ERROR_INTERRUPTS	(INTRS_IOARCB_TRANSFER_FAILED | \
					 INTRS_IOA_UNIT_CHECK | \
					 INTRS_NO_HRRQ_FOR_CMD_RESPONSE | \
					 INTRS_IOARRIN_LOST | \
					 INTRS_SYSTEM_BUS_MMIO_ERROR | \
					 INTRS_IOA_PROCESSOR_ERROR)

#define PMCRAID_PCI_INTERRUPTS		(PMCRAID_ERROR_INTERRUPTS | \
					 INTRS_HRRQ_VALID | \
					 INTRS_TRANSITION_TO_OPERATIONAL |\
					 INTRS_ALLOW_MSIX_VECTOR0)

/* control_block, associated with each of the commands contains IOARCB, IOADLs
 * memory for IOASA. Additional 3 * 16 bytes are allocated in order to support
 * additional request parameters (of max size 48) any command.
 */
struct pmcraid_control_block {
	struct pmcraid_ioarcb ioarcb;
	struct pmcraid_ioadl_desc ioadl[PMCRAID_IOADLS_EXTERNAL + 3];
	struct pmcraid_ioasa ioasa;
} __attribute__ ((packed, aligned(PMCRAID_IOARCB_ALIGNMENT)));

/* pmcraid_sglist - Scatter-gather list allocated for passthrough ioctls
 */
struct pmcraid_sglist {
	u32 order;
	u32 num_sg;
	u32 num_dma_sg;
	u32 buffer_len;
	struct scatterlist scatterlist[1];
};

/* page D0 inquiry data of focal point resource */
struct pmcraid_inquiry_data {
	__u8	ph_dev_type;
	__u8	page_code;
	__u8	reserved1;
	__u8	add_page_len;
	__u8	length;
	__u8	reserved2;
	__le16	fw_version;
	__u8	reserved3[16];
};

#define PMCRAID_TIMESTAMP_LEN		12
#define PMCRAID_REQ_TM_STR_LEN		6
#define PMCRAID_SCSI_SET_TIMESTAMP	0xA4
#define PMCRAID_SCSI_SERVICE_ACTION	0x0F

struct pmcraid_timestamp_data {
	__u8 reserved1[4];
	__u8 timestamp[PMCRAID_REQ_TM_STR_LEN];		/* current time value */
	__u8 reserved2[2];
};

/* pmcraid_cmd - LLD representation of SCSI command */
struct pmcraid_cmd {

	/* Ptr and bus address of DMA.able control block for this command */
	struct pmcraid_control_block *ioa_cb;
	dma_addr_t ioa_cb_bus_addr;
	dma_addr_t dma_handle;

	/* pointer to mid layer structure of SCSI commands */
	struct scsi_cmnd *scsi_cmd;

	struct list_head free_list;
	struct completion wait_for_completion;
	struct timer_list timer;	/* needed for internal commands */
	u32 timeout;			/* current timeout value */
	u32 index;			/* index into the command list */
	u8 completion_req;		/* for handling internal commands */
	u8 release;			/* for handling completions */

	void (*cmd_done) (struct pmcraid_cmd *);
	struct pmcraid_instance *drv_inst;

	struct pmcraid_sglist *sglist; /* used for passthrough IOCTLs */

	/* scratch used */
	union {
		/* during reset sequence */
		unsigned long time_left;
		struct pmcraid_resource_entry *res;
		int hrrq_index;

		/* used during IO command error handling. Sense buffer
		 * for REQUEST SENSE command if firmware is not sending
		 * auto sense data
		 */
		struct  {
			u8 *sense_buffer;
			dma_addr_t sense_buffer_dma;
		};
	};
};

/*
 * Interrupt registers of IOA
 */
struct pmcraid_interrupts {
	void __iomem *ioa_host_interrupt_reg;
	void __iomem *ioa_host_msix_interrupt_reg;
	void __iomem *ioa_host_interrupt_clr_reg;
	void __iomem *ioa_host_interrupt_mask_reg;
	void __iomem *ioa_host_interrupt_mask_clr_reg;
	void __iomem *global_interrupt_mask_reg;
	void __iomem *host_ioa_interrupt_reg;
	void __iomem *host_ioa_interrupt_clr_reg;
};

/* ISR parameters LLD allocates (one for each MSI-X if enabled) vectors */
struct pmcraid_isr_param {
	struct pmcraid_instance *drv_inst;
	u16 vector;			/* allocated msi-x vector */
	u8 hrrq_id;			/* hrrq entry index */
};


/* AEN message header sent as part of event data to applications */
struct pmcraid_aen_msg {
	u32 hostno;
	u32 length;
	u8  reserved[8];
	u8  data[0];
};

/* Controller state event message type */
struct pmcraid_state_msg {
	struct pmcraid_aen_msg msg;
	u32 ioa_state;
};

#define PMC_DEVICE_EVENT_RESET_START		0x11000000
#define PMC_DEVICE_EVENT_RESET_SUCCESS		0x11000001
#define PMC_DEVICE_EVENT_RESET_FAILED		0x11000002
#define PMC_DEVICE_EVENT_SHUTDOWN_START		0x11000003
#define PMC_DEVICE_EVENT_SHUTDOWN_SUCCESS	0x11000004
#define PMC_DEVICE_EVENT_SHUTDOWN_FAILED	0x11000005

struct pmcraid_hostrcb {
	struct pmcraid_instance *drv_inst;
	struct pmcraid_aen_msg *msg;
	struct pmcraid_hcam_hdr *hcam;	/* pointer to hcam buffer */
	struct pmcraid_cmd  *cmd;       /* pointer to command block used */
	dma_addr_t baddr;		/* system address of hcam buffer */
	atomic_t ignore;		/* process HCAM response ? */
};

#define PMCRAID_AEN_HDR_SIZE	sizeof(struct pmcraid_aen_msg)



/*
 * Per adapter structure maintained by LLD
 */
struct pmcraid_instance {
	/* Array of allowed-to-be-exposed resources, initialized from
	 * Configutation Table, later updated with CCNs
	 */
	struct pmcraid_resource_entry *res_entries;

	struct list_head free_res_q;	/* res_entries lists for easy lookup */
	struct list_head used_res_q;	/* List of to be exposed resources */
	spinlock_t resource_lock;	/* spinlock to protect resource list */

	void __iomem *mapped_dma_addr;
	void __iomem *ioa_status;	/* Iomapped IOA status register */
	void __iomem *mailbox;		/* Iomapped mailbox register */
	void __iomem *ioarrin;		/* IOmapped IOARR IN register */

	struct pmcraid_interrupts int_regs;
	struct pmcraid_chip_details *chip_cfg;

	/* HostRCBs needed for HCAM */
	struct pmcraid_hostrcb ldn;
	struct pmcraid_hostrcb ccn;
	struct pmcraid_state_msg scn;	/* controller state change msg */


	/* Bus address of start of HRRQ */
	dma_addr_t hrrq_start_bus_addr[PMCRAID_NUM_MSIX_VECTORS];

	/* Pointer to 1st entry of HRRQ */
	__be32 *hrrq_start[PMCRAID_NUM_MSIX_VECTORS];

	/* Pointer to last entry of HRRQ */
	__be32 *hrrq_end[PMCRAID_NUM_MSIX_VECTORS];

	/* Pointer to current pointer of hrrq */
	__be32 *hrrq_curr[PMCRAID_NUM_MSIX_VECTORS];

	/* Lock for HRRQ access */
	spinlock_t hrrq_lock[PMCRAID_NUM_MSIX_VECTORS];

	struct pmcraid_inquiry_data *inq_data;
	dma_addr_t  inq_data_baddr;

	struct pmcraid_timestamp_data *timestamp_data;
	dma_addr_t  timestamp_data_baddr;

	/* size of configuration table entry, varies based on the firmware */
	u32	config_table_entry_size;

	/* Expected toggle bit at host */
	u8 host_toggle_bit[PMCRAID_NUM_MSIX_VECTORS];


	/* Wait Q for  threads to wait for Reset IOA completion */
	wait_queue_head_t reset_wait_q;
	struct pmcraid_cmd *reset_cmd;

	/* structures for supporting SIGIO based AEN. */
	struct fasync_struct *aen_queue;
	struct mutex aen_queue_lock;	/* lock for aen subscribers list */
	struct cdev cdev;

	struct Scsi_Host *host;	/* mid layer interface structure handle */
	struct pci_dev *pdev;	/* PCI device structure handle */

	/* No of Reset IOA retries . IOA marked dead if threshold exceeds */
	u8 ioa_reset_attempts;
#define PMCRAID_RESET_ATTEMPTS 3

	u8  current_log_level;	/* default level for logging IOASC errors */

	u8  num_hrrq;		/* Number of interrupt vectors allocated */
	u8  interrupt_mode;	/* current interrupt mode legacy or msix */
	dev_t dev;		/* Major-Minor numbers for Char device */

	/* Used as ISR handler argument */
	struct pmcraid_isr_param hrrq_vector[PMCRAID_NUM_MSIX_VECTORS];

	/* Message id as filled in last fired IOARCB, used to identify HRRQ */
	atomic_t last_message_id;

	/* configuration table */
	struct pmcraid_config_table *cfg_table;
	dma_addr_t cfg_table_bus_addr;

	/* structures related to command blocks */
	struct kmem_cache *cmd_cachep;		/* cache for cmd blocks */
	struct pci_pool *control_pool;		/* pool for control blocks */
	char   cmd_pool_name[64];		/* name of cmd cache */
	char   ctl_pool_name[64];		/* name of control cache */

	struct pmcraid_cmd *cmd_list[PMCRAID_MAX_CMD];

	struct list_head free_cmd_pool;
	struct list_head pending_cmd_pool;
	spinlock_t free_pool_lock;		/* free pool lock */
	spinlock_t pending_pool_lock;		/* pending pool lock */

	/* Tasklet to handle deferred processing */
	struct tasklet_struct isr_tasklet[PMCRAID_NUM_MSIX_VECTORS];

	/* Work-queue (Shared) for deferred reset processing */
	struct work_struct worker_q;

	/* No of IO commands pending with FW */
	atomic_t outstanding_cmds;

	/* should add/delete resources to mid-layer now ?*/
	atomic_t expose_resources;



	u32 ioa_state:4;	/* For IOA Reset sequence FSM */
#define IOA_STATE_OPERATIONAL       0x0
#define IOA_STATE_UNKNOWN           0x1
#define IOA_STATE_DEAD              0x2
#define IOA_STATE_IN_SOFT_RESET     0x3
#define IOA_STATE_IN_HARD_RESET     0x4
#define IOA_STATE_IN_RESET_ALERT    0x5
#define IOA_STATE_IN_BRINGDOWN      0x6
#define IOA_STATE_IN_BRINGUP        0x7

	u32 ioa_reset_in_progress:1; /* true if IOA reset is in progress */
	u32 ioa_hard_reset:1;	/* TRUE if Hard Reset is needed */
	u32 ioa_unit_check:1;	/* Indicates Unit Check condition */
	u32 ioa_bringdown:1;	/* whether IOA needs to be brought down */
	u32 force_ioa_reset:1;  /* force adapter reset ? */
	u32 reinit_cfg_table:1; /* reinit config table due to lost CCN */
	u32 ioa_shutdown_type:2;/* shutdown type used during reset */
#define SHUTDOWN_NONE               0x0
#define SHUTDOWN_NORMAL             0x1
#define SHUTDOWN_ABBREV             0x2
	u32 timestamp_error:1; /* indicate set timestamp for out of sync */

};

/* LLD maintained resource entry structure */
struct pmcraid_resource_entry {
	struct list_head queue;	/* link to "to be exposed" resources */
	union {
		struct pmcraid_config_table_entry cfg_entry;
		struct pmcraid_config_table_entry_ext cfg_entry_ext;
	};
	struct scsi_device *scsi_dev;	/* Link scsi_device structure */
	atomic_t read_failures;		/* count of failed READ commands */
	atomic_t write_failures;	/* count of failed WRITE commands */

	/* To indicate add/delete/modify during CCN */
	u8 change_detected;
#define RES_CHANGE_ADD          0x1	/* add this to mid-layer */
#define RES_CHANGE_DEL          0x2	/* remove this from mid-layer */

	u8 reset_progress;      /* Device is resetting */

	/*
	 * When IOA asks for sync (i.e. IOASC = Not Ready, Sync Required), this
	 * flag will be set, mid layer will be asked to retry. In the next
	 * attempt, this flag will be checked in queuecommand() to set
	 * SYNC_COMPLETE flag in IOARCB (flag_0).
	 */
	u8 sync_reqd;

	/* target indicates the mapped target_id assigned to this resource if
	 * this is VSET resource. For non-VSET resources this will be un-used
	 * or zero
	 */
	u8 target;
};

/* Data structures used in IOASC error code logging */
struct pmcraid_ioasc_error {
	u32 ioasc_code;		/* IOASC code */
	u8 log_level;		/* default log level assignment. */
	char *error_string;
};

/* Initial log_level assignments for various IOASCs */
#define IOASC_LOG_LEVEL_NONE	    0x0 /* no logging */
#define IOASC_LOG_LEVEL_MUST        0x1	/* must log: all high-severity errors */
#define IOASC_LOG_LEVEL_HARD        0x2	/* optional – low severity errors */

/* Error information maintained by LLD. LLD initializes the pmcraid_error_table
 * statically.
 */
static struct pmcraid_ioasc_error pmcraid_ioasc_error_table[] = {
	{0x01180600, IOASC_LOG_LEVEL_HARD,
	 "Recovered Error, soft media error, sector reassignment suggested"},
	{0x015D0000, IOASC_LOG_LEVEL_HARD,
	 "Recovered Error, failure prediction thresold exceeded"},
	{0x015D9200, IOASC_LOG_LEVEL_HARD,
	 "Recovered Error, soft Cache Card Battery error thresold"},
	{0x015D9200, IOASC_LOG_LEVEL_HARD,
	 "Recovered Error, soft Cache Card Battery error thresold"},
	{0x02048000, IOASC_LOG_LEVEL_HARD,
	 "Not Ready, IOA Reset Required"},
	{0x02408500, IOASC_LOG_LEVEL_HARD,
	 "Not Ready, IOA microcode download required"},
	{0x03110B00, IOASC_LOG_LEVEL_HARD,
	 "Medium Error, data unreadable, reassignment suggested"},
	{0x03110C00, IOASC_LOG_LEVEL_MUST,
	 "Medium Error, data unreadable do not reassign"},
	{0x03310000, IOASC_LOG_LEVEL_HARD,
	 "Medium Error, media corrupted"},
	{0x04050000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA can't communicate with device"},
	{0x04080000, IOASC_LOG_LEVEL_MUST,
	 "Hardware Error, device bus error"},
	{0x04088000, IOASC_LOG_LEVEL_MUST,
	 "Hardware Error, device bus is not functioning"},
	{0x04118000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA reserved area data check"},
	{0x04118100, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA reserved area invalid data pattern"},
	{0x04118200, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA reserved area LRC error"},
	{0x04320000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, reassignment space exhausted"},
	{0x04330000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, data transfer underlength error"},
	{0x04330000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, data transfer overlength error"},
	{0x04418000, IOASC_LOG_LEVEL_MUST,
	 "Hardware Error, PCI bus error"},
	{0x04440000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, device error"},
	{0x04448200, IOASC_LOG_LEVEL_MUST,
	 "Hardware Error, IOA error"},
	{0x04448300, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, undefined device response"},
	{0x04448400, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA microcode error"},
	{0x04448600, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, IOA reset required"},
	{0x04449200, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, hard Cache Fearuee Card Battery error"},
	{0x0444A000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, failed device altered"},
	{0x0444A200, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, data check after reassignment"},
	{0x0444A300, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, LRC error after reassignment"},
	{0x044A0000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, device bus error (msg/cmd phase)"},
	{0x04670400, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, new device can't be used"},
	{0x04678000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, invalid multiadapter configuration"},
	{0x04678100, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, incorrect connection between enclosures"},
	{0x04678200, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, connections exceed IOA design limits"},
	{0x04678300, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, incorrect multipath connection"},
	{0x04679000, IOASC_LOG_LEVEL_HARD,
	 "Hardware Error, command to LUN failed"},
	{0x064C8000, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, cache exists for missing/failed device"},
	{0x06670100, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, incompatible exposed mode device"},
	{0x06670600, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, attachment of logical unit failed"},
	{0x06678000, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, cables exceed connective design limit"},
	{0x06678300, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, incomplete multipath connection between" \
	 "IOA and enclosure"},
	{0x06678400, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, incomplete multipath connection between" \
	 "device and enclosure"},
	{0x06678500, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, incomplete multipath connection between" \
	 "IOA and remote IOA"},
	{0x06678600, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, missing remote IOA"},
	{0x06679100, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, enclosure doesn't support required multipath" \
	 "function"},
	{0x06698200, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, corrupt array parity detected on device"},
	{0x066B0200, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, array exposed"},
	{0x066B8200, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, exposed array is still protected"},
	{0x066B9200, IOASC_LOG_LEVEL_HARD,
	 "Unit Attention, Multipath redundancy level got worse"},
	{0x07270000, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, device is read/write protected by IOA"},
	{0x07278000, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, IOA doesn't support device attribute"},
	{0x07278100, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, NVRAM mirroring prohibited"},
	{0x07278400, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, array is short 2 or more devices"},
	{0x07278600, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, exposed array is short a required device"},
	{0x07278700, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, array members not at required addresses"},
	{0x07278800, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, exposed mode device resource address conflict"},
	{0x07278900, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, incorrect resource address of exposed mode device"},
	{0x07278A00, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, Array is missing a device and parity is out of sync"},
	{0x07278B00, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, maximum number of arrays already exist"},
	{0x07278C00, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, cannot locate cache data for device"},
	{0x07278D00, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, cache data exits for a changed device"},
	{0x07279100, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, detection of a device requiring format"},
	{0x07279200, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, IOA exceeds maximum number of devices"},
	{0x07279600, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, missing array, volume set is not functional"},
	{0x07279700, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, single device for a volume set"},
	{0x07279800, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, missing multiple devices for a volume set"},
	{0x07279900, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, maximum number of volument sets already exists"},
	{0x07279A00, IOASC_LOG_LEVEL_HARD,
	 "Data Protect, other volume set problem"},
};

/* macros to help in debugging */
#define pmcraid_err(...)  \
	printk(KERN_ERR "MaxRAID: "__VA_ARGS__)

#define pmcraid_info(...) \
	if (pmcraid_debug_log) \
		printk(KERN_INFO "MaxRAID: "__VA_ARGS__)

/* check if given command is a SCSI READ or SCSI WRITE command */
#define SCSI_READ_CMD           0x1	/* any of SCSI READ commands */
#define SCSI_WRITE_CMD          0x2	/* any of SCSI WRITE commands */
#define SCSI_CMD_TYPE(opcode) \
({  u8 op = opcode; u8 __type = 0;\
	if (op == READ_6 || op == READ_10 || op == READ_12 || op == READ_16)\
		__type = SCSI_READ_CMD;\
	else if (op == WRITE_6 || op == WRITE_10 || op == WRITE_12 || \
		 op == WRITE_16)\
		__type = SCSI_WRITE_CMD;\
	__type;\
})

#define IS_SCSI_READ_WRITE(opcode) \
({	u8 __type = SCSI_CMD_TYPE(opcode); \
	(__type == SCSI_READ_CMD || __type == SCSI_WRITE_CMD) ? 1 : 0;\
})


/*
 * pmcraid_ioctl_header - definition of header structure that preceeds all the
 * buffers given as ioctl arguments.
 *
 * .signature           : always ASCII string, "PMCRAID"
 * .reserved            : not used
 * .buffer_length       : length of the buffer following the header
 */
struct pmcraid_ioctl_header {
	u8  signature[8];
	u32 reserved;
	u32 buffer_length;
};

#define PMCRAID_IOCTL_SIGNATURE      "PMCRAID"

/*
 * pmcraid_passthrough_ioctl_buffer - structure given as argument to
 * passthrough(or firmware handled) IOCTL commands. Note that ioarcb requires
 * 32-byte alignment so, it is necessary to pack this structure to avoid any
 * holes between ioctl_header and passthrough buffer
 *
 * .ioactl_header : ioctl header
 * .ioarcb        : filled-up ioarcb buffer, driver always reads this buffer
 * .ioasa         : buffer for ioasa, driver fills this with IOASA from firmware
 * .request_buffer: The I/O buffer (flat), driver reads/writes to this based on
 *                  the transfer directions passed in ioarcb.flags0. Contents
 *                  of this buffer are valid only when ioarcb.data_transfer_len
 *                  is not zero.
 */
struct pmcraid_passthrough_ioctl_buffer {
	struct pmcraid_ioctl_header ioctl_header;
	struct pmcraid_ioarcb ioarcb;
	struct pmcraid_ioasa  ioasa;
	u8  request_buffer[1];
} __attribute__ ((packed));

/*
 * keys to differentiate between driver handled IOCTLs and passthrough
 * IOCTLs passed to IOA. driver determines the ioctl type using macro
 * _IOC_TYPE
 */
#define PMCRAID_DRIVER_IOCTL         'D'
#define PMCRAID_PASSTHROUGH_IOCTL    'F'

#define DRV_IOCTL(n, size) \
	_IOC(_IOC_READ|_IOC_WRITE, PMCRAID_DRIVER_IOCTL, (n), (size))

#define FMW_IOCTL(n, size) \
	_IOC(_IOC_READ|_IOC_WRITE, PMCRAID_PASSTHROUGH_IOCTL,  (n), (size))

/*
 * _ARGSIZE: macro that gives size of the argument type passed to an IOCTL cmd.
 * This is to facilitate applications avoiding un-necessary memory allocations.
 * For example, most of driver handled ioctls do not require ioarcb, ioasa.
 */
#define _ARGSIZE(arg) (sizeof(struct pmcraid_ioctl_header) + sizeof(arg))

/* Driver handled IOCTL command definitions */

#define PMCRAID_IOCTL_RESET_ADAPTER          \
	DRV_IOCTL(5, sizeof(struct pmcraid_ioctl_header))

/* passthrough/firmware handled commands */
#define PMCRAID_IOCTL_PASSTHROUGH_COMMAND         \
	FMW_IOCTL(1, sizeof(struct pmcraid_passthrough_ioctl_buffer))

#define PMCRAID_IOCTL_DOWNLOAD_MICROCODE     \
	FMW_IOCTL(2, sizeof(struct pmcraid_passthrough_ioctl_buffer))


#endif /* _PMCRAID_H */