bsd/sys/disk.h

   1 /*
   2  * Copyright (c) 1998-2014 Apple Computer, Inc. All rights reserved.
   3  *
   4  * @APPLE_OSREFERENCE_LICENSE_HEADER_START@
   5  *
   6  * This file contains Original Code and/or Modifications of Original Code
   7  * as defined in and that are subject to the Apple Public Source License
   8  * Version 2.0 (the 'License'). You may not use this file except in
   9  * compliance with the License. The rights granted to you under the License
  10  * may not be used to create, or enable the creation or redistribution of,
  11  * unlawful or unlicensed copies of an Apple operating system, or to
  12  * circumvent, violate, or enable the circumvention or violation of, any
  13  * terms of an Apple operating system software license agreement.
  14  *
  15  * Please obtain a copy of the License at
  16  * http://www.opensource.apple.com/apsl/ and read it before using this file.
  17  *
  18  * The Original Code and all software distributed under the License are
  19  * distributed on an 'AS IS' basis, WITHOUT WARRANTY OF ANY KIND, EITHER
  20  * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
  21  * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
  22  * FITNESS FOR A PARTICULAR PURPOSE, QUIET ENJOYMENT OR NON-INFRINGEMENT.
  23  * Please see the License for the specific language governing rights and
  24  * limitations under the License.
  25  *
  26  * @APPLE_OSREFERENCE_LICENSE_HEADER_END@
  27  */
  28
  29 #ifndef _SYS_DISK_H_
  30 #define _SYS_DISK_H_
  31
  32 #include <stdint.h>
  33 #include <sys/ioctl.h>
  34
  35 #ifdef XNU_KERNEL_PRIVATE
  36 #include <mach/boolean.h>
  37 #endif /* XNU_KERNEL_PRIVATE */
  38
  39 /*
  40  * Definitions
  41  *
  42  * ioctl                                 description
  43  * ------------------------------------- ---------------------------------------
  44  * DKIOCEJECT                            eject media
  45  * DKIOCSYNCHRONIZE                      flush media
  46  *
  47  * DKIOCFORMAT                           format media
  48  * DKIOCGETFORMATCAPACITIES              get media's formattable capacities
  49  *
  50  * DKIOCGETBLOCKSIZE                     get media's block size
  51  * DKIOCGETBLOCKCOUNT                    get media's block count
  52  * DKIOCGETFIRMWAREPATH                  get media's firmware path
  53  *
  54  * DKIOCISFORMATTED                      is media formatted?
  55  * DKIOCISWRITABLE                       is media writable?
  56  *
  57  * DKIOCREQUESTIDLE                      idle media
  58  * DKIOCUNMAP                            delete unused data
  59  *
  60  * DKIOCGETMAXBLOCKCOUNTREAD             get maximum block count for reads
  61  * DKIOCGETMAXBLOCKCOUNTWRITE            get maximum block count for writes
  62  * DKIOCGETMAXBYTECOUNTREAD              get maximum byte count for reads
  63  * DKIOCGETMAXBYTECOUNTWRITE             get maximum byte count for writes
  64  *
  65  * DKIOCGETMAXSEGMENTCOUNTREAD           get maximum segment count for reads
  66  * DKIOCGETMAXSEGMENTCOUNTWRITE          get maximum segment count for writes
  67  * DKIOCGETMAXSEGMENTBYTECOUNTREAD       get maximum segment byte count for reads
  68  * DKIOCGETMAXSEGMENTBYTECOUNTWRITE      get maximum segment byte count for writes
  69  *
  70  * DKIOCGETMINSEGMENTALIGNMENTBYTECOUNT  get minimum segment alignment in bytes
  71  * DKIOCGETMAXSEGMENTADDRESSABLEBITCOUNT get maximum segment width in bits
  72  *
  73  * DKIOCGETFEATURES                      get device's feature set
  74  * DKIOCGETPHYSICALBLOCKSIZE             get device's block size
  75  * DKIOCGETCOMMANDPOOLSIZE               get device's queue depth
  76  *
  77  * DKIOCGETPROVISIONSTATUS               get device's block provision status
  78  * DKIOCGETIOMINSATURATIONBYTECOUNT      get minimum byte count to saturate storage bandwidth
  79  *
  80  * DKIOCGETERRORDESCRIPTION              get description of any drive error
  81  */
  82
  83 #define DK_FEATURE_BARRIER                    0x00000002
  84 #define DK_FEATURE_PRIORITY                   0x00000004
  85 #define DK_FEATURE_UNMAP                      0x00000010
  86
  87 #define DK_SYNCHRONIZE_OPTION_BARRIER         0x00000002
  88
  89 typedef struct
  90 {
  91     uint64_t               offset;
  92     uint64_t               length;
  93 } dk_extent_t;
  94
  95 typedef struct
  96 {
  97     char                   path[128];
  98 } dk_firmware_path_t;
  99
 100 typedef struct
 101 {
 102     uint64_t               blockCount;
 103     uint32_t               blockSize;
 104
 105     uint8_t                reserved0096[4];        /* reserved, clear to zero */
 106 } dk_format_capacity_t;
 107
 108 typedef struct
 109 {
 110     dk_format_capacity_t * capacities;
 111     uint32_t               capacitiesCount;        /* use zero to probe count */
 112
 113 #ifdef __LP64__
 114     uint8_t                reserved0096[4];        /* reserved, clear to zero */
 115 #else /* !__LP64__ */
 116     uint8_t                reserved0064[8];        /* reserved, clear to zero */
 117 #endif /* !__LP64__ */
 118 } dk_format_capacities_t;
 119
 120 typedef struct
 121 {
 122     uint64_t               offset;
 123     uint64_t               length;
 124
 125     uint32_t               options;
 126
 127     uint8_t                reserved0160[4];        /* reserved, clear to zero */
 128 } dk_synchronize_t;
 129
 130 typedef struct
 131 {
 132     dk_extent_t *          extents;
 133     uint32_t               extentsCount;
 134
 135     uint32_t               options;
 136
 137 #ifndef __LP64__
 138     uint8_t                reserved0096[4];        /* reserved, clear to zero */
 139 #endif /* !__LP64__ */
 140 } dk_unmap_t;
 141
 142
 143 typedef struct
 144 {
 145         uint64_t           flags;
 146         uint64_t           hotfile_size;           /* in bytes */
 147         uint64_t           hibernate_minsize;
 148         uint64_t           swapfile_pinning;
 149
 150         uint64_t           padding[4];
 151 } dk_corestorage_info_t;
 152
 153 #define DK_CORESTORAGE_PIN_YOUR_METADATA        0x00000001
 154 #define DK_CORESTORAGE_ENABLE_HOTFILES          0x00000002
 155 #define DK_CORESTORAGE_PIN_YOUR_SWAPFILE        0x00000004
 156
 157 #define DK_PROVISION_TYPE_MAPPED                0x00
 158 #define DK_PROVISION_TYPE_DEALLOCATED           0x01
 159 #define DK_PROVISION_TYPE_ANCHORED              0x02
 160
 161 typedef struct
 162 {
 163         uint64_t           offset;
 164         uint64_t           length;
 165         uint8_t            provisionType;
 166         uint8_t            reserved[7];
 167 } dk_provision_extent_t;
 168
 169 typedef struct
 170 {
 171         uint64_t                offset;         /* input:        logical byte offset */
 172         uint64_t                length;         /* input:        byte length, 0 for whole length */
 173         uint64_t                options;        /*               reserved, clear to zero */
 174         uint32_t                reserved;       /*               not used */
 175         uint32_t                extentsCount;   /* input/output: count for extents */
 176         dk_provision_extent_t * extents;        /* output:       provision extents */
 177 } dk_provision_status_t;
 178
 179 typedef struct
 180 {
 181         uint64_t               options;        /*               reserved, clear to zero */
 182         uint64_t               reserved;       /*               reserved, clear to zero */
 183         uint64_t               description_size;
 184         char *                 description;
 185 } dk_error_description_t;
 186
 187
 188 #ifdef KERNEL
 189 #ifdef PRIVATE
 190
 191 /* Definitions of option bits for dk_unmap_t */
 192 #define _DK_UNMAP_INITIALIZE                   0x00000100
 193
 194 #endif /* PRIVATE */
 195 #endif /* KERNEL */
 196
 197 #define DKIOCEJECT                            _IO('d', 21)
 198 #define DKIOCSYNCHRONIZE                      _IOW('d', 22, dk_synchronize_t)
 199
 200 #define DKIOCFORMAT                           _IOW('d', 26, dk_format_capacity_t)
 201 #define DKIOCGETFORMATCAPACITIES              _IOWR('d', 26, dk_format_capacities_t)
 202
 203 #define DKIOCGETBLOCKSIZE                     _IOR('d', 24, uint32_t)
 204 #define DKIOCGETBLOCKCOUNT                    _IOR('d', 25, uint64_t)
 205 #define DKIOCGETFIRMWAREPATH                  _IOR('d', 28, dk_firmware_path_t)
 206
 207 #define DKIOCISFORMATTED                      _IOR('d', 23, uint32_t)
 208 #define DKIOCISWRITABLE                       _IOR('d', 29, uint32_t)
 209
 210 #define DKIOCREQUESTIDLE                      _IO('d', 30)
 211 #define DKIOCUNMAP                            _IOW('d', 31, dk_unmap_t)
 212 #define DKIOCCORESTORAGE                      _IOR('d', 32, dk_corestorage_info_t)
 213
 214 #define DKIOCGETMAXBLOCKCOUNTREAD             _IOR('d', 64, uint64_t)
 215 #define DKIOCGETMAXBLOCKCOUNTWRITE            _IOR('d', 65, uint64_t)
 216 #define DKIOCGETMAXBYTECOUNTREAD              _IOR('d', 70, uint64_t)
 217 #define DKIOCGETMAXBYTECOUNTWRITE             _IOR('d', 71, uint64_t)
 218
 219 #define DKIOCGETMAXSEGMENTCOUNTREAD           _IOR('d', 66, uint64_t)
 220 #define DKIOCGETMAXSEGMENTCOUNTWRITE          _IOR('d', 67, uint64_t)
 221 #define DKIOCGETMAXSEGMENTBYTECOUNTREAD       _IOR('d', 68, uint64_t)
 222 #define DKIOCGETMAXSEGMENTBYTECOUNTWRITE      _IOR('d', 69, uint64_t)
 223
 224 #define DKIOCGETMINSEGMENTALIGNMENTBYTECOUNT  _IOR('d', 74, uint64_t)
 225 #define DKIOCGETMAXSEGMENTADDRESSABLEBITCOUNT _IOR('d', 75, uint64_t)
 226
 227 #define DKIOCGETFEATURES                      _IOR('d', 76, uint32_t)
 228 #define DKIOCGETPHYSICALBLOCKSIZE             _IOR('d', 77, uint32_t)
 229 #define DKIOCGETCOMMANDPOOLSIZE               _IOR('d', 78, uint32_t)
 230
 231 #define DKIOCGETPROVISIONSTATUS               _IOWR('d', 79, dk_provision_status_t)
 232
 233 #define DKIOCGETERRORDESCRIPTION              _IOR('d', 80, dk_error_description_t)
 234
 235 #define DKIOCSYNCHRONIZECACHE                 _IO('d', 22)
 236
 237 #ifdef KERNEL
 238 #define DK_FEATURE_FORCE_UNIT_ACCESS          0x00000001
 239
 240 #define DK_ENCRYPTION_TYPE_AES_CBC            1
 241 #define DK_ENCRYPTION_TYPE_AES_XEX            2
 242 #define DK_ENCRYPTION_TYPE_AES_XTS            3
 243
 244 #define DK_TIER_MASK                          0xC0
 245 #define DK_TIER_SHIFT                         6
 246
 247 #define DK_TIER_TO_PRIORITY(tier)             (((tier) << DK_TIER_SHIFT) | ~DK_TIER_MASK)
 248 #define DK_PRIORITY_TO_TIER(priority)         ((priority) >> DK_TIER_SHIFT)
 249
 250 typedef struct
 251 {
 252     uint64_t               offset;
 253     uint64_t               length;
 254
 255     uint8_t                reserved0128[12];       /* reserved, clear to zero */
 256
 257     dev_t                  dev;
 258 } dk_physical_extent_t;
 259
 260 typedef struct
 261 {
 262     dk_extent_t *          extents;
 263     uint32_t               extentsCount;
 264
 265     uint8_t                tier;
 266
 267 #ifdef __LP64__
 268     uint8_t                reserved0104[3];        /* reserved, clear to zero */
 269 #else /* !__LP64__ */
 270     uint8_t                reserved0072[7];        /* reserved, clear to zero */
 271 #endif /* !__LP64__ */
 272 } dk_set_tier_t;
 273
 274 #define DKIOCSETBLOCKSIZE                     _IOW('d', 24, uint32_t)
 275 #define DKIOCGETBSDUNIT                       _IOR('d', 27, uint32_t)
 276 #define DKIOCISSOLIDSTATE                     _IOR('d', 79, uint32_t)
 277 #define DKIOCISVIRTUAL                        _IOR('d', 72, uint32_t)
 278 #define DKIOCGETBASE                          _IOR('d', 73, uint64_t)
 279 #define DKIOCGETTHROTTLEMASK                  _IOR('d', 80, uint64_t)
 280 #define DKIOCLOCKPHYSICALEXTENTS              _IO('d', 81)
 281 #define DKIOCGETPHYSICALEXTENT                _IOWR('d', 82, dk_physical_extent_t)
 282 #define DKIOCUNLOCKPHYSICALEXTENTS            _IO('d', 83)
 283 #define DKIOCSETTIER                          _IOW('d', 85, dk_set_tier_t)
 284 #define DKIOCGETENCRYPTIONTYPE                _IOR('d', 86, uint32_t)
 285 #define DKIOCISLOWPOWERMODE                   _IOR('d', 87, uint32_t)
 286 #define DKIOCGETIOMINSATURATIONBYTECOUNT      _IOR('d', 88, uint32_t)
 287
 288 #ifdef XNU_KERNEL_PRIVATE
 289 typedef struct
 290 {
 291     boolean_t mi_mdev; /* Is this a memdev device? */
 292     boolean_t mi_phys; /* Physical memory? */
 293     uint32_t mi_base;  /* Base page number of the device? */
 294     uint64_t mi_size;  /* Size of the device (in ) */
 295 } dk_memdev_info_t;
 296
 297 typedef dk_memdev_info_t memdev_info_t;
 298
 299 #define DKIOCGETMEMDEVINFO                    _IOR('d', 90, dk_memdev_info_t)
 300 #endif /* XNU_KERNEL_PRIVATE */
 301 #ifdef PRIVATE
 302 typedef struct _dk_cs_pin {
 303         dk_extent_t     cp_extent;
 304         int64_t         cp_flags;
 305 } _dk_cs_pin_t;
 306 /* The following are modifiers to _DKIOCCSPINEXTENT/cp_flags operation */
 307 #define _DKIOCCSPINTOFASTMEDIA          (0)                     /* Pin extent to the fast (SSD) media             */
 308 #define _DKIOCCSPINFORHIBERNATION       (1 << 0)        /* Pin of hibernation file, content not preserved */
 309 #define _DKIOCCSPINDISCARDBLACKLIST     (1 << 1)        /* Hibernation complete/error, stop blacklisting  */
 310 #define _DKIOCCSPINTOSLOWMEDIA          (1 << 2)        /* Pin extent to the slow (HDD) media             */
 311 #define _DKIOCCSTEMPORARYPIN            (1 << 3)        /* Relocate, but do not pin, to indicated media   */
 312 #define _DKIOCCSHIBERNATEIMGSIZE        (1 << 4)        /* Anticipate/Max size of the upcoming hibernate  */
 313 #define _DKIOCCSPINFORSWAPFILE          (1 << 5)        /* Pin of swap file, content not preserved        */
 314
 315 #define _DKIOCCSSETLVNAME                     _IOW('d', 198, char[256])
 316 #define _DKIOCCSPINEXTENT                     _IOW('d', 199, _dk_cs_pin_t)
 317 #define _DKIOCCSUNPINEXTENT                   _IOW('d', 200, _dk_cs_pin_t)
 318 #define _DKIOCGETMIGRATIONUNITBYTESIZE        _IOR('d', 201, uint32_t)
 319
 320 typedef struct _dk_cs_map {
 321         dk_extent_t     cm_extent;
 322         uint64_t        cm_bytes_mapped;
 323 } _dk_cs_map_t;
 324
 325 typedef struct _dk_cs_unmap {
 326         dk_extent_t                  *extents;
 327         uint32_t                     extentsCount;
 328         uint32_t                     options;
 329 } _dk_cs_unmap_t;
 330
 331 #define _DKIOCCSMAP                           _IOWR('d', 202, _dk_cs_map_t)
 332 // No longer used: _DKIOCCSSETFSVNODE (203) & _DKIOCCSGETFREEBYTES (204)
 333 #define _DKIOCCSUNMAP                         _IOWR('d', 205, _dk_cs_unmap_t)
 334 #endif /* PRIVATE */
 335 #endif /* KERNEL */
 336
 337 #ifdef PRIVATE
 338 #endif /* PRIVATE */
 339
 340 #endif  /* _SYS_DISK_H_ */