summaryrefslogtreecommitdiffstats
path: root/drivers/scsi/megaraid/megaraid_sas_fusion.h
blob: 82b577a72c8bc162b7aa307d2bd55ce9681046b5 (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
/*
 *  Linux MegaRAID driver for SAS based RAID controllers
 *
 *  Copyright (c) 2009-2011  LSI Corporation.
 *
 *  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
 *
 *  FILE: megaraid_sas_fusion.h
 *
 *  Authors: LSI Corporation
 *           Manoj Jose
 *           Sumant Patro
 *
 *  Send feedback to: <megaraidlinux@lsi.com>
 *
 *  Mail to: LSI Corporation, 1621 Barber Lane, Milpitas, CA 95035
 *     ATTN: Linuxraid
 */

#ifndef _MEGARAID_SAS_FUSION_H_
#define _MEGARAID_SAS_FUSION_H_

/* Fusion defines */
#define MEGASAS_MAX_SZ_CHAIN_FRAME 1024
#define MFI_FUSION_ENABLE_INTERRUPT_MASK (0x00000009)
#define MEGA_MPI2_RAID_DEFAULT_IO_FRAME_SIZE 256
#define MEGASAS_MPI2_FUNCTION_PASSTHRU_IO_REQUEST   0xF0
#define MEGASAS_MPI2_FUNCTION_LD_IO_REQUEST         0xF1
#define MEGASAS_LOAD_BALANCE_FLAG		    0x1
#define MEGASAS_DCMD_MBOX_PEND_FLAG		    0x1
#define HOST_DIAG_WRITE_ENABLE			    0x80
#define HOST_DIAG_RESET_ADAPTER			    0x4
#define MEGASAS_FUSION_MAX_RESET_TRIES		    3

/* T10 PI defines */
#define MR_PROT_INFO_TYPE_CONTROLLER                0x8
#define MEGASAS_SCSI_VARIABLE_LENGTH_CMD            0x7f
#define MEGASAS_SCSI_SERVICE_ACTION_READ32          0x9
#define MEGASAS_SCSI_SERVICE_ACTION_WRITE32         0xB
#define MEGASAS_SCSI_ADDL_CDB_LEN                   0x18
#define MEGASAS_RD_WR_PROTECT_CHECK_ALL		    0x20
#define MEGASAS_RD_WR_PROTECT_CHECK_NONE	    0x60
#define MEGASAS_EEDPBLOCKSIZE			    512

/*
 * Raid context flags
 */

#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_SHIFT   0x4
#define MR_RAID_CTX_RAID_FLAGS_IO_SUB_TYPE_MASK    0x30
enum MR_RAID_FLAGS_IO_SUB_TYPE {
	MR_RAID_FLAGS_IO_SUB_TYPE_NONE = 0,
	MR_RAID_FLAGS_IO_SUB_TYPE_SYSTEM_PD = 1,
};

/*
 * Request descriptor types
 */
#define MEGASAS_REQ_DESCRIPT_FLAGS_LD_IO           0x7
#define MEGASAS_REQ_DESCRIPT_FLAGS_MFA             0x1

#define MEGASAS_REQ_DESCRIPT_FLAGS_TYPE_SHIFT      1

#define MEGASAS_FP_CMD_LEN	16
#define MEGASAS_FUSION_IN_RESET 0

/*
 * Raid Context structure which describes MegaRAID specific IO Paramenters
 * This resides at offset 0x60 where the SGL normally starts in MPT IO Frames
 */

struct RAID_CONTEXT {
	u16     resvd0;
	u16     timeoutValue;
	u8      regLockFlags;
	u8      resvd1;
	u16     VirtualDiskTgtId;
	u64     regLockRowLBA;
	u32     regLockLength;
	u16     nextLMId;
	u8      exStatus;
	u8      status;
	u8      RAIDFlags;
	u8      numSGE;
	u16	configSeqNum;
	u8      spanArm;
	u8      resvd2[3];
};

#define RAID_CTX_SPANARM_ARM_SHIFT	(0)
#define RAID_CTX_SPANARM_ARM_MASK	(0x1f)

#define RAID_CTX_SPANARM_SPAN_SHIFT	(5)
#define RAID_CTX_SPANARM_SPAN_MASK	(0xE0)

/*
 * define region lock types
 */
enum REGION_TYPE {
	REGION_TYPE_UNUSED       = 0,
	REGION_TYPE_SHARED_READ  = 1,
	REGION_TYPE_SHARED_WRITE = 2,
	REGION_TYPE_EXCLUSIVE    = 3,
};

/* MPI2 defines */
#define MPI2_FUNCTION_IOC_INIT              (0x02) /* IOC Init */
#define MPI2_WHOINIT_HOST_DRIVER            (0x04)
#define MPI2_VERSION_MAJOR                  (0x02)
#define MPI2_VERSION_MINOR                  (0x00)
#define MPI2_VERSION_MAJOR_MASK             (0xFF00)
#define MPI2_VERSION_MAJOR_SHIFT            (8)
#define MPI2_VERSION_MINOR_MASK             (0x00FF)
#define MPI2_VERSION_MINOR_SHIFT            (0)
#define MPI2_VERSION ((MPI2_VERSION_MAJOR << MPI2_VERSION_MAJOR_SHIFT) | \
		      MPI2_VERSION_MINOR)
#define MPI2_HEADER_VERSION_UNIT            (0x10)
#define MPI2_HEADER_VERSION_DEV             (0x00)
#define MPI2_HEADER_VERSION_UNIT_MASK       (0xFF00)
#define MPI2_HEADER_VERSION_UNIT_SHIFT      (8)
#define MPI2_HEADER_VERSION_DEV_MASK        (0x00FF)
#define MPI2_HEADER_VERSION_DEV_SHIFT       (0)
#define MPI2_HEADER_VERSION ((MPI2_HEADER_VERSION_UNIT << 8) | \
			     MPI2_HEADER_VERSION_DEV)
#define MPI2_IEEE_SGE_FLAGS_IOCPLBNTA_ADDR      (0x03)
#define MPI2_SCSIIO_EEDPFLAGS_INC_PRI_REFTAG        (0x8000)
#define MPI2_SCSIIO_EEDPFLAGS_CHECK_REFTAG          (0x0400)
#define MPI2_SCSIIO_EEDPFLAGS_CHECK_REMOVE_OP       (0x0003)
#define MPI2_SCSIIO_EEDPFLAGS_CHECK_APPTAG          (0x0200)
#define MPI2_SCSIIO_EEDPFLAGS_CHECK_GUARD           (0x0100)
#define MPI2_SCSIIO_EEDPFLAGS_INSERT_OP             (0x0004)
#define MPI2_FUNCTION_SCSI_IO_REQUEST               (0x00) /* SCSI IO */
#define MPI2_REQ_DESCRIPT_FLAGS_HIGH_PRIORITY           (0x06)
#define MPI2_REQ_DESCRIPT_FLAGS_SCSI_IO                 (0x00)
#define MPI2_SGE_FLAGS_64_BIT_ADDRESSING        (0x02)
#define MPI2_SCSIIO_CONTROL_WRITE               (0x01000000)
#define MPI2_SCSIIO_CONTROL_READ                (0x02000000)
#define MPI2_REQ_DESCRIPT_FLAGS_TYPE_MASK       (0x0E)
#define MPI2_RPY_DESCRIPT_FLAGS_UNUSED          (0x0F)
#define MPI2_RPY_DESCRIPT_FLAGS_SCSI_IO_SUCCESS (0x00)
#define MPI2_RPY_DESCRIPT_FLAGS_TYPE_MASK       (0x0F)
#define MPI2_WRSEQ_FLUSH_KEY_VALUE              (0x0)
#define MPI2_WRITE_SEQUENCE_OFFSET              (0x00000004)
#define MPI2_WRSEQ_1ST_KEY_VALUE                (0xF)
#define MPI2_WRSEQ_2ND_KEY_VALUE                (0x4)
#define MPI2_WRSEQ_3RD_KEY_VALUE                (0xB)
#define MPI2_WRSEQ_4TH_KEY_VALUE                (0x2)
#define MPI2_WRSEQ_5TH_KEY_VALUE                (0x7)
#define MPI2_WRSEQ_6TH_KEY_VALUE                (0xD)

struct MPI25_IEEE_SGE_CHAIN64 {
	u64                     Address;
	u32                     Length;
	u16                     Reserved1;
	u8                      NextChainOffset;
	u8                      Flags;
};

struct MPI2_SGE_SIMPLE_UNION {
	u32                     FlagsLength;
	union {
		u32                 Address32;
		u64                 Address64;
	} u;
};

struct MPI2_SCSI_IO_CDB_EEDP32 {
	u8                      CDB[20];                    /* 0x00 */
	u32                     PrimaryReferenceTag;        /* 0x14 */
	u16                     PrimaryApplicationTag;      /* 0x18 */
	u16                     PrimaryApplicationTagMask;  /* 0x1A */
	u32                     TransferLength;             /* 0x1C */
};

struct MPI2_SGE_CHAIN_UNION {
	u16                     Length;
	u8                      NextChainOffset;
	u8                      Flags;
	union {
		u32                 Address32;
		u64                 Address64;
	} u;
};

struct MPI2_IEEE_SGE_SIMPLE32 {
	u32                     Address;
	u32                     FlagsLength;
};

struct MPI2_IEEE_SGE_CHAIN32 {
	u32                     Address;
	u32                     FlagsLength;
};

struct MPI2_IEEE_SGE_SIMPLE64 {
	u64                     Address;
	u32                     Length;
	u16                     Reserved1;
	u8                      Reserved2;
	u8                      Flags;
};

struct MPI2_IEEE_SGE_CHAIN64 {
	u64                     Address;
	u32                     Length;
	u16                     Reserved1;
	u8                      Reserved2;
	u8                      Flags;
};

union MPI2_IEEE_SGE_SIMPLE_UNION {
	struct MPI2_IEEE_SGE_SIMPLE32  Simple32;
	struct MPI2_IEEE_SGE_SIMPLE64  Simple64;
};

union MPI2_IEEE_SGE_CHAIN_UNION {
	struct MPI2_IEEE_SGE_CHAIN32   Chain32;
	struct MPI2_IEEE_SGE_CHAIN64   Chain64;
};

union MPI2_SGE_IO_UNION {
	struct MPI2_SGE_SIMPLE_UNION       MpiSimple;
	struct MPI2_SGE_CHAIN_UNION        MpiChain;
	union MPI2_IEEE_SGE_SIMPLE_UNION  IeeeSimple;
	union MPI2_IEEE_SGE_CHAIN_UNION   IeeeChain;
};

union MPI2_SCSI_IO_CDB_UNION {
	u8                      CDB32[32];
	struct MPI2_SCSI_IO_CDB_EEDP32 EEDP32;
	struct MPI2_SGE_SIMPLE_UNION SGE;
};

/*
 * RAID SCSI IO Request Message
 * Total SGE count will be one less than  _MPI2_SCSI_IO_REQUEST
 */
struct MPI2_RAID_SCSI_IO_REQUEST {
	u16                     DevHandle;                      /* 0x00 */
	u8                      ChainOffset;                    /* 0x02 */
	u8                      Function;                       /* 0x03 */
	u16                     Reserved1;                      /* 0x04 */
	u8                      Reserved2;                      /* 0x06 */
	u8                      MsgFlags;                       /* 0x07 */
	u8                      VP_ID;                          /* 0x08 */
	u8                      VF_ID;                          /* 0x09 */
	u16                     Reserved3;                      /* 0x0A */
	u32                     SenseBufferLowAddress;          /* 0x0C */
	u16                     SGLFlags;                       /* 0x10 */
	u8                      SenseBufferLength;              /* 0x12 */
	u8                      Reserved4;                      /* 0x13 */
	u8                      SGLOffset0;                     /* 0x14 */
	u8                      SGLOffset1;                     /* 0x15 */
	u8                      SGLOffset2;                     /* 0x16 */
	u8                      SGLOffset3;                     /* 0x17 */
	u32                     SkipCount;                      /* 0x18 */
	u32                     DataLength;                     /* 0x1C */
	u32                     BidirectionalDataLength;        /* 0x20 */
	u16                     IoFlags;                        /* 0x24 */
	u16                     EEDPFlags;                      /* 0x26 */
	u32                     EEDPBlockSize;                  /* 0x28 */
	u32                     SecondaryReferenceTag;          /* 0x2C */
	u16                     SecondaryApplicationTag;        /* 0x30 */
	u16                     ApplicationTagTranslationMask;  /* 0x32 */
	u8                      LUN[8];                         /* 0x34 */
	u32                     Control;                        /* 0x3C */
	union MPI2_SCSI_IO_CDB_UNION  CDB;			/* 0x40 */
	struct RAID_CONTEXT	RaidContext;                    /* 0x60 */
	union MPI2_SGE_IO_UNION       SGL;			/* 0x80 */
};

/*
 * MPT RAID MFA IO Descriptor.
 */
struct MEGASAS_RAID_MFA_IO_REQUEST_DESCRIPTOR {
	u32     RequestFlags:8;
	u32     MessageAddress1:24; /* bits 31:8*/
	u32     MessageAddress2;      /* bits 61:32 */
};

/* Default Request Descriptor */
struct MPI2_DEFAULT_REQUEST_DESCRIPTOR {
	u8              RequestFlags;               /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             LMID;                       /* 0x04 */
	u16             DescriptorTypeDependent;    /* 0x06 */
};

/* High Priority Request Descriptor */
struct MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR {
	u8              RequestFlags;               /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             LMID;                       /* 0x04 */
	u16             Reserved1;                  /* 0x06 */
};

/* SCSI IO Request Descriptor */
struct MPI2_SCSI_IO_REQUEST_DESCRIPTOR {
	u8              RequestFlags;               /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             LMID;                       /* 0x04 */
	u16             DevHandle;                  /* 0x06 */
};

/* SCSI Target Request Descriptor */
struct MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR {
	u8              RequestFlags;               /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             LMID;                       /* 0x04 */
	u16             IoIndex;                    /* 0x06 */
};

/* RAID Accelerator Request Descriptor */
struct MPI2_RAID_ACCEL_REQUEST_DESCRIPTOR {
	u8              RequestFlags;               /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             LMID;                       /* 0x04 */
	u16             Reserved;                   /* 0x06 */
};

/* union of Request Descriptors */
union MEGASAS_REQUEST_DESCRIPTOR_UNION {
	struct MPI2_DEFAULT_REQUEST_DESCRIPTOR             Default;
	struct MPI2_HIGH_PRIORITY_REQUEST_DESCRIPTOR       HighPriority;
	struct MPI2_SCSI_IO_REQUEST_DESCRIPTOR             SCSIIO;
	struct MPI2_SCSI_TARGET_REQUEST_DESCRIPTOR         SCSITarget;
	struct MPI2_RAID_ACCEL_REQUEST_DESCRIPTOR          RAIDAccelerator;
	struct MEGASAS_RAID_MFA_IO_REQUEST_DESCRIPTOR      MFAIo;
	union {
		struct {
			u32 low;
			u32 high;
		} u;
		u64 Words;
	};
};

/* Default Reply Descriptor */
struct MPI2_DEFAULT_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             DescriptorTypeDependent1;   /* 0x02 */
	u32             DescriptorTypeDependent2;   /* 0x04 */
};

/* Address Reply Descriptor */
struct MPI2_ADDRESS_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u32             ReplyFrameAddress;          /* 0x04 */
};

/* SCSI IO Success Reply Descriptor */
struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u16             TaskTag;                    /* 0x04 */
	u16             Reserved1;                  /* 0x06 */
};

/* TargetAssist Success Reply Descriptor */
struct MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u8              SequenceNumber;             /* 0x04 */
	u8              Reserved1;                  /* 0x05 */
	u16             IoIndex;                    /* 0x06 */
};

/* Target Command Buffer Reply Descriptor */
struct MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u8              VP_ID;                      /* 0x02 */
	u8              Flags;                      /* 0x03 */
	u16             InitiatorDevHandle;         /* 0x04 */
	u16             IoIndex;                    /* 0x06 */
};

/* RAID Accelerator Success Reply Descriptor */
struct MPI2_RAID_ACCELERATOR_SUCCESS_REPLY_DESCRIPTOR {
	u8              ReplyFlags;                 /* 0x00 */
	u8              MSIxIndex;                  /* 0x01 */
	u16             SMID;                       /* 0x02 */
	u32             Reserved;                   /* 0x04 */
};

/* union of Reply Descriptors */
union MPI2_REPLY_DESCRIPTORS_UNION {
	struct MPI2_DEFAULT_REPLY_DESCRIPTOR                   Default;
	struct MPI2_ADDRESS_REPLY_DESCRIPTOR                   AddressReply;
	struct MPI2_SCSI_IO_SUCCESS_REPLY_DESCRIPTOR           SCSIIOSuccess;
	struct MPI2_TARGETASSIST_SUCCESS_REPLY_DESCRIPTOR TargetAssistSuccess;
	struct MPI2_TARGET_COMMAND_BUFFER_REPLY_DESCRIPTOR TargetCommandBuffer;
	struct MPI2_RAID_ACCELERATOR_SUCCESS_REPLY_DESCRIPTOR
	RAIDAcceleratorSuccess;
	u64                                             Words;
};

/* IOCInit Request message */
struct MPI2_IOC_INIT_REQUEST {
	u8                      WhoInit;                        /* 0x00 */
	u8                      Reserved1;                      /* 0x01 */
	u8                      ChainOffset;                    /* 0x02 */
	u8                      Function;                       /* 0x03 */
	u16                     Reserved2;                      /* 0x04 */
	u8                      Reserved3;                      /* 0x06 */
	u8                      MsgFlags;                       /* 0x07 */
	u8                      VP_ID;                          /* 0x08 */
	u8                      VF_ID;                          /* 0x09 */
	u16                     Reserved4;                      /* 0x0A */
	u16                     MsgVersion;                     /* 0x0C */
	u16                     HeaderVersion;                  /* 0x0E */
	u32                     Reserved5;                      /* 0x10 */
	u16                     Reserved6;                      /* 0x14 */
	u8                      Reserved7;                      /* 0x16 */
	u8                      HostMSIxVectors;                /* 0x17 */
	u16                     Reserved8;                      /* 0x18 */
	u16                     SystemRequestFrameSize;         /* 0x1A */
	u16                     ReplyDescriptorPostQueueDepth;  /* 0x1C */
	u16                     ReplyFreeQueueDepth;            /* 0x1E */
	u32                     SenseBufferAddressHigh;         /* 0x20 */
	u32                     SystemReplyAddressHigh;         /* 0x24 */
	u64                     SystemRequestFrameBaseAddress;  /* 0x28 */
	u64                     ReplyDescriptorPostQueueAddress;/* 0x30 */
	u64                     ReplyFreeQueueAddress;          /* 0x38 */
	u64                     TimeStamp;                      /* 0x40 */
};

/* mrpriv defines */
#define MR_PD_INVALID 0xFFFF
#define MAX_SPAN_DEPTH 8
#define MAX_RAIDMAP_SPAN_DEPTH (MAX_SPAN_DEPTH)
#define MAX_ROW_SIZE 32
#define MAX_RAIDMAP_ROW_SIZE (MAX_ROW_SIZE)
#define MAX_LOGICAL_DRIVES 64
#define MAX_RAIDMAP_LOGICAL_DRIVES (MAX_LOGICAL_DRIVES)
#define MAX_RAIDMAP_VIEWS (MAX_LOGICAL_DRIVES)
#define MAX_ARRAYS 128
#define MAX_RAIDMAP_ARRAYS (MAX_ARRAYS)
#define MAX_PHYSICAL_DEVICES 256
#define MAX_RAIDMAP_PHYSICAL_DEVICES (MAX_PHYSICAL_DEVICES)
#define MR_DCMD_LD_MAP_GET_INFO             0x0300e101

struct MR_DEV_HANDLE_INFO {
	u16     curDevHdl;
	u8      validHandles;
	u8      reserved;
	u16     devHandle[2];
};

struct MR_ARRAY_INFO {
	u16      pd[MAX_RAIDMAP_ROW_SIZE];
};

struct MR_QUAD_ELEMENT {
	u64     logStart;
	u64     logEnd;
	u64     offsetInSpan;
	u32     diff;
	u32     reserved1;
};

struct MR_SPAN_INFO {
	u32             noElements;
	u32             reserved1;
	struct MR_QUAD_ELEMENT quad[MAX_RAIDMAP_SPAN_DEPTH];
};

struct MR_LD_SPAN {
	u64      startBlk;
	u64      numBlks;
	u16      arrayRef;
	u8       reserved[6];
};

struct MR_SPAN_BLOCK_INFO {
	u64          num_rows;
	struct MR_LD_SPAN   span;
	struct MR_SPAN_INFO block_span_info;
};

struct MR_LD_RAID {
	struct {
		u32     fpCapable:1;
		u32     reserved5:3;
		u32     ldPiMode:4;
		u32     pdPiMode:4;
		u32     encryptionType:8;
		u32     fpWriteCapable:1;
		u32     fpReadCapable:1;
		u32     fpWriteAcrossStripe:1;
		u32     fpReadAcrossStripe:1;
		u32     reserved4:8;
	} capability;
	u32     reserved6;
	u64     size;
	u8      spanDepth;
	u8      level;
	u8      stripeShift;
	u8      rowSize;
	u8      rowDataSize;
	u8      writeMode;
	u8      PRL;
	u8      SRL;
	u16     targetId;
	u8      ldState;
	u8      regTypeReqOnWrite;
	u8      modFactor;
	u8      reserved2[1];
	u16     seqNum;

	struct {
		u32 ldSyncRequired:1;
		u32 reserved:31;
	} flags;

	u8      reserved3[0x5C];
};

struct MR_LD_SPAN_MAP {
	struct MR_LD_RAID          ldRaid;
	u8                  dataArmMap[MAX_RAIDMAP_ROW_SIZE];
	struct MR_SPAN_BLOCK_INFO  spanBlock[MAX_RAIDMAP_SPAN_DEPTH];
};

struct MR_FW_RAID_MAP {
	u32                 totalSize;
	union {
		struct {
			u32         maxLd;
			u32         maxSpanDepth;
			u32         maxRowSize;
			u32         maxPdCount;
			u32         maxArrays;
		} validationInfo;
		u32             version[5];
		u32             reserved1[5];
	};

	u32                 ldCount;
	u32                 Reserved1;
	u8                  ldTgtIdToLd[MAX_RAIDMAP_LOGICAL_DRIVES+
					MAX_RAIDMAP_VIEWS];
	u8                  fpPdIoTimeoutSec;
	u8                  reserved2[7];
	struct MR_ARRAY_INFO       arMapInfo[MAX_RAIDMAP_ARRAYS];
	struct MR_DEV_HANDLE_INFO  devHndlInfo[MAX_RAIDMAP_PHYSICAL_DEVICES];
	struct MR_LD_SPAN_MAP      ldSpanMap[1];
};

struct IO_REQUEST_INFO {
	u64 ldStartBlock;
	u32 numBlocks;
	u16 ldTgtId;
	u8 isRead;
	u16 devHandle;
	u64 pdBlock;
	u8 fpOkForIo;
};

struct MR_LD_TARGET_SYNC {
	u8  targetId;
	u8  reserved;
	u16 seqNum;
};

#define IEEE_SGE_FLAGS_ADDR_MASK            (0x03)
#define IEEE_SGE_FLAGS_SYSTEM_ADDR          (0x00)
#define IEEE_SGE_FLAGS_IOCDDR_ADDR          (0x01)
#define IEEE_SGE_FLAGS_IOCPLB_ADDR          (0x02)
#define IEEE_SGE_FLAGS_IOCPLBNTA_ADDR       (0x03)
#define IEEE_SGE_FLAGS_CHAIN_ELEMENT        (0x80)
#define IEEE_SGE_FLAGS_END_OF_LIST          (0x40)

struct megasas_register_set;
struct megasas_instance;

union desc_word {
	u64 word;
	struct {
		u32 low;
		u32 high;
	} u;
};

struct megasas_cmd_fusion {
	struct MPI2_RAID_SCSI_IO_REQUEST	*io_request;
	dma_addr_t			io_request_phys_addr;

	union MPI2_SGE_IO_UNION	*sg_frame;
	dma_addr_t		sg_frame_phys_addr;

	u8 *sense;
	dma_addr_t sense_phys_addr;

	struct list_head list;
	struct scsi_cmnd *scmd;
	struct megasas_instance *instance;

	u8 retry_for_fw_reset;
	union MEGASAS_REQUEST_DESCRIPTOR_UNION  *request_desc;

	/*
	 * Context for a MFI frame.
	 * Used to get the mfi cmd from list when a MFI cmd is completed
	 */
	u32 sync_cmd_idx;
	u32 index;
	u8 flags;
};

struct LD_LOAD_BALANCE_INFO {
	u8	loadBalanceFlag;
	u8	reserved1;
	u16     raid1DevHandle[2];
	atomic_t     scsi_pending_cmds[2];
	u64     last_accessed_block[2];
};

struct MR_FW_RAID_MAP_ALL {
	struct MR_FW_RAID_MAP raidMap;
	struct MR_LD_SPAN_MAP ldSpanMap[MAX_LOGICAL_DRIVES - 1];
} __attribute__ ((packed));

struct fusion_context {
	struct megasas_cmd_fusion **cmd_list;
	struct list_head cmd_pool;

	spinlock_t cmd_pool_lock;

	dma_addr_t req_frames_desc_phys;
	u8 *req_frames_desc;

	struct dma_pool *io_request_frames_pool;
	dma_addr_t io_request_frames_phys;
	u8 *io_request_frames;

	struct dma_pool *sg_dma_pool;
	struct dma_pool *sense_dma_pool;

	dma_addr_t reply_frames_desc_phys;
	union MPI2_REPLY_DESCRIPTORS_UNION *reply_frames_desc;
	struct dma_pool *reply_frames_desc_pool;

	u16 last_reply_idx;

	u32 reply_q_depth;
	u32 request_alloc_sz;
	u32 reply_alloc_sz;
	u32 io_frames_alloc_sz;

	u16	max_sge_in_main_msg;
	u16	max_sge_in_chain;

	u8	chain_offset_io_request;
	u8	chain_offset_mfi_pthru;

	struct MR_FW_RAID_MAP_ALL *ld_map[2];
	dma_addr_t ld_map_phys[2];

	u32 map_sz;
	u8 fast_path_io;
	struct LD_LOAD_BALANCE_INFO load_balance_info[MAX_LOGICAL_DRIVES];
};

union desc_value {
	u64 word;
	struct {
		u32 low;
		u32 high;
	} u;
};

#endif /* _MEGARAID_SAS_FUSION_H_ */