include/scsi/scsi.h

   1 /*
   2  * This header file contains public constants and structures used by
   3  * the scsi code for linux.
   4  *
   5  * For documentation on the OPCODES, MESSAGES, and SENSE values,
   6  * please consult the SCSI standard.
   7  */
   8 #ifndef _SCSI_SCSI_H
   9 #define _SCSI_SCSI_H
  10
  11 #include <linux/types.h>
  12
  13 /*
  14  *      The maximum sg list length SCSI can cope with
  15  *      (currently must be a power of 2 between 32 and 256)
  16  */
  17 #define SCSI_MAX_PHYS_SEGMENTS  MAX_PHYS_SEGMENTS
  18
  19
  20 /*
  21  *      SCSI command lengths
  22  */
  23
  24 extern const unsigned char scsi_command_size[8];
  25 #define COMMAND_SIZE(opcode) scsi_command_size[((opcode) >> 5) & 7]
  26
  27 /*
  28  *      SCSI device types
  29  */
  30
  31 #define MAX_SCSI_DEVICE_CODE 14
  32 extern const char *const scsi_device_types[MAX_SCSI_DEVICE_CODE];
  33
  34 /*
  35  *      SCSI opcodes
  36  */
  37
  38 #define TEST_UNIT_READY       0x00
  39 #define REZERO_UNIT           0x01
  40 #define REQUEST_SENSE         0x03
  41 #define FORMAT_UNIT           0x04
  42 #define READ_BLOCK_LIMITS     0x05
  43 #define REASSIGN_BLOCKS       0x07
  44 #define READ_6                0x08
  45 #define WRITE_6               0x0a
  46 #define SEEK_6                0x0b
  47 #define READ_REVERSE          0x0f
  48 #define WRITE_FILEMARKS       0x10
  49 #define SPACE                 0x11
  50 #define INQUIRY               0x12
  51 #define RECOVER_BUFFERED_DATA 0x14
  52 #define MODE_SELECT           0x15
  53 #define RESERVE               0x16
  54 #define RELEASE               0x17
  55 #define COPY                  0x18
  56 #define ERASE                 0x19
  57 #define MODE_SENSE            0x1a
  58 #define START_STOP            0x1b
  59 #define RECEIVE_DIAGNOSTIC    0x1c
  60 #define SEND_DIAGNOSTIC       0x1d
  61 #define ALLOW_MEDIUM_REMOVAL  0x1e
  62
  63 #define SET_WINDOW            0x24
  64 #define READ_CAPACITY         0x25
  65 #define READ_10               0x28
  66 #define WRITE_10              0x2a
  67 #define SEEK_10               0x2b
  68 #define WRITE_VERIFY          0x2e
  69 #define VERIFY                0x2f
  70 #define SEARCH_HIGH           0x30
  71 #define SEARCH_EQUAL          0x31
  72 #define SEARCH_LOW            0x32
  73 #define SET_LIMITS            0x33
  74 #define PRE_FETCH             0x34
  75 #define READ_POSITION         0x34
  76 #define SYNCHRONIZE_CACHE     0x35
  77 #define LOCK_UNLOCK_CACHE     0x36
  78 #define READ_DEFECT_DATA      0x37
  79 #define MEDIUM_SCAN           0x38
  80 #define COMPARE               0x39
  81 #define COPY_VERIFY           0x3a
  82 #define WRITE_BUFFER          0x3b
  83 #define READ_BUFFER           0x3c
  84 #define UPDATE_BLOCK          0x3d
  85 #define READ_LONG             0x3e
  86 #define WRITE_LONG            0x3f
  87 #define CHANGE_DEFINITION     0x40
  88 #define WRITE_SAME            0x41
  89 #define READ_TOC              0x43
  90 #define LOG_SELECT            0x4c
  91 #define LOG_SENSE             0x4d
  92 #define MODE_SELECT_10        0x55
  93 #define RESERVE_10            0x56
  94 #define RELEASE_10            0x57
  95 #define MODE_SENSE_10         0x5a
  96 #define PERSISTENT_RESERVE_IN 0x5e
  97 #define PERSISTENT_RESERVE_OUT 0x5f
  98 #define REPORT_LUNS           0xa0
  99 #define MOVE_MEDIUM           0xa5
 100 #define READ_12               0xa8
 101 #define WRITE_12              0xaa
 102 #define WRITE_VERIFY_12       0xae
 103 #define SEARCH_HIGH_12        0xb0
 104 #define SEARCH_EQUAL_12       0xb1
 105 #define SEARCH_LOW_12         0xb2
 106 #define READ_ELEMENT_STATUS   0xb8
 107 #define SEND_VOLUME_TAG       0xb6
 108 #define WRITE_LONG_2          0xea
 109 #define READ_16               0x88
 110 #define WRITE_16              0x8a
 111 #define VERIFY_16             0x8f
 112 #define SERVICE_ACTION_IN     0x9e
 113 /* values for service action in */
 114 #define SAI_READ_CAPACITY_16  0x10
 115
 116
 117 /*
 118  *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
 119  *  T10/1561-D Revision 4 Draft dated 7th November 2002.
 120  */
 121 #define SAM_STAT_GOOD            0x00
 122 #define SAM_STAT_CHECK_CONDITION 0x02
 123 #define SAM_STAT_CONDITION_MET   0x04
 124 #define SAM_STAT_BUSY            0x08
 125 #define SAM_STAT_INTERMEDIATE    0x10
 126 #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
 127 #define SAM_STAT_RESERVATION_CONFLICT 0x18
 128 #define SAM_STAT_COMMAND_TERMINATED 0x22        /* obsolete in SAM-3 */
 129 #define SAM_STAT_TASK_SET_FULL   0x28
 130 #define SAM_STAT_ACA_ACTIVE      0x30
 131 #define SAM_STAT_TASK_ABORTED    0x40
 132
 133 /** scsi_status_is_good - check the status return.
 134  *
 135  * @status: the status passed up from the driver (including host and
 136  *          driver components)
 137  *
 138  * This returns true for known good conditions that may be treated as
 139  * command completed normally
 140  */
 141 static inline int scsi_status_is_good(int status)
 142 {
 143         /*
 144          * FIXME: bit0 is listed as reserved in SCSI-2, but is
 145          * significant in SCSI-3.  For now, we follow the SCSI-2
 146          * behaviour and ignore reserved bits.
 147          */
 148         status &= 0xfe;
 149         return ((status == SAM_STAT_GOOD) ||
 150                 (status == SAM_STAT_INTERMEDIATE) ||
 151                 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
 152                 /* FIXME: this is obsolete in SAM-3 */
 153                 (status == SAM_STAT_COMMAND_TERMINATED));
 154 }
 155
 156 /*
 157  *  Status codes. These are deprecated as they are shifted 1 bit right
 158  *  from those found in the SCSI standards. This causes confusion for
 159  *  applications that are ported to several OSes. Prefer SAM Status codes
 160  *  above.
 161  */
 162
 163 #define GOOD                 0x00
 164 #define CHECK_CONDITION      0x01
 165 #define CONDITION_GOOD       0x02
 166 #define BUSY                 0x04
 167 #define INTERMEDIATE_GOOD    0x08
 168 #define INTERMEDIATE_C_GOOD  0x0a
 169 #define RESERVATION_CONFLICT 0x0c
 170 #define COMMAND_TERMINATED   0x11
 171 #define QUEUE_FULL           0x14
 172
 173 #define STATUS_MASK          0x3e
 174
 175 /*
 176  *  SENSE KEYS
 177  */
 178
 179 #define NO_SENSE            0x00
 180 #define RECOVERED_ERROR     0x01
 181 #define NOT_READY           0x02
 182 #define MEDIUM_ERROR        0x03
 183 #define HARDWARE_ERROR      0x04
 184 #define ILLEGAL_REQUEST     0x05
 185 #define UNIT_ATTENTION      0x06
 186 #define DATA_PROTECT        0x07
 187 #define BLANK_CHECK         0x08
 188 #define COPY_ABORTED        0x0a
 189 #define ABORTED_COMMAND     0x0b
 190 #define VOLUME_OVERFLOW     0x0d
 191 #define MISCOMPARE          0x0e
 192
 193
 194 /*
 195  *  DEVICE TYPES
 196  */
 197
 198 #define TYPE_DISK           0x00
 199 #define TYPE_TAPE           0x01
 200 #define TYPE_PRINTER        0x02
 201 #define TYPE_PROCESSOR      0x03    /* HP scanners use this */
 202 #define TYPE_WORM           0x04    /* Treated as ROM by our system */
 203 #define TYPE_ROM            0x05
 204 #define TYPE_SCANNER        0x06
 205 #define TYPE_MOD            0x07    /* Magneto-optical disk -
 206                                      * - treated as TYPE_DISK */
 207 #define TYPE_MEDIUM_CHANGER 0x08
 208 #define TYPE_COMM           0x09    /* Communications device */
 209 #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
 210 #define TYPE_RAID           0x0c
 211 #define TYPE_NO_LUN         0x7f
 212
 213 /*
 214  * standard mode-select header prepended to all mode-select commands
 215  */
 216
 217 struct ccs_modesel_head {
 218         __u8 _r1;                       /* reserved */
 219         __u8 medium;            /* device-specific medium type */
 220         __u8 _r2;                       /* reserved */
 221         __u8 block_desc_length; /* block descriptor length */
 222         __u8 density;           /* device-specific density code */
 223         __u8 number_blocks_hi;  /* number of blocks in this block desc */
 224         __u8 number_blocks_med;
 225         __u8 number_blocks_lo;
 226         __u8 _r3;
 227         __u8 block_length_hi;   /* block length for blocks in this desc */
 228         __u8 block_length_med;
 229         __u8 block_length_lo;
 230 };
 231
 232 /*
 233  * ScsiLun: 8 byte LUN.
 234  */
 235 struct scsi_lun {
 236         __u8 scsi_lun[8];
 237 };
 238
 239 /*
 240  *  MESSAGE CODES
 241  */
 242
 243 #define COMMAND_COMPLETE    0x00
 244 #define EXTENDED_MESSAGE    0x01
 245 #define     EXTENDED_MODIFY_DATA_POINTER    0x00
 246 #define     EXTENDED_SDTR                   0x01
 247 #define     EXTENDED_EXTENDED_IDENTIFY      0x02    /* SCSI-I only */
 248 #define     EXTENDED_WDTR                   0x03
 249 #define SAVE_POINTERS       0x02
 250 #define RESTORE_POINTERS    0x03
 251 #define DISCONNECT          0x04
 252 #define INITIATOR_ERROR     0x05
 253 #define ABORT               0x06
 254 #define MESSAGE_REJECT      0x07
 255 #define NOP                 0x08
 256 #define MSG_PARITY_ERROR    0x09
 257 #define LINKED_CMD_COMPLETE 0x0a
 258 #define LINKED_FLG_CMD_COMPLETE 0x0b
 259 #define BUS_DEVICE_RESET    0x0c
 260
 261 #define INITIATE_RECOVERY   0x0f            /* SCSI-II only */
 262 #define RELEASE_RECOVERY    0x10            /* SCSI-II only */
 263
 264 #define SIMPLE_QUEUE_TAG    0x20
 265 #define HEAD_OF_QUEUE_TAG   0x21
 266 #define ORDERED_QUEUE_TAG   0x22
 267
 268 /*
 269  * Host byte codes
 270  */
 271
 272 #define DID_OK          0x00    /* NO error                                */
 273 #define DID_NO_CONNECT  0x01    /* Couldn't connect before timeout period  */
 274 #define DID_BUS_BUSY    0x02    /* BUS stayed busy through time out period */
 275 #define DID_TIME_OUT    0x03    /* TIMED OUT for other reason              */
 276 #define DID_BAD_TARGET  0x04    /* BAD target.                             */
 277 #define DID_ABORT       0x05    /* Told to abort for some other reason     */
 278 #define DID_PARITY      0x06    /* Parity error                            */
 279 #define DID_ERROR       0x07    /* Internal error                          */
 280 #define DID_RESET       0x08    /* Reset by somebody.                      */
 281 #define DID_BAD_INTR    0x09    /* Got an interrupt we weren't expecting.  */
 282 #define DID_PASSTHROUGH 0x0a    /* Force command past mid-layer            */
 283 #define DID_SOFT_ERROR  0x0b    /* The low level driver just wish a retry  */
 284 #define DID_IMM_RETRY   0x0c    /* Retry without decrementing retry count  */
 285 #define DRIVER_OK       0x00    /* Driver status                           */
 286
 287 /*
 288  *  These indicate the error that occurred, and what is available.
 289  */
 290
 291 #define DRIVER_BUSY         0x01
 292 #define DRIVER_SOFT         0x02
 293 #define DRIVER_MEDIA        0x03
 294 #define DRIVER_ERROR        0x04
 295
 296 #define DRIVER_INVALID      0x05
 297 #define DRIVER_TIMEOUT      0x06
 298 #define DRIVER_HARD         0x07
 299 #define DRIVER_SENSE        0x08
 300
 301 #define SUGGEST_RETRY       0x10
 302 #define SUGGEST_ABORT       0x20
 303 #define SUGGEST_REMAP       0x30
 304 #define SUGGEST_DIE         0x40
 305 #define SUGGEST_SENSE       0x80
 306 #define SUGGEST_IS_OK       0xff
 307
 308 #define DRIVER_MASK         0x0f
 309 #define SUGGEST_MASK        0xf0
 310
 311 /*
 312  * Internal return values.
 313  */
 314
 315 #define NEEDS_RETRY     0x2001
 316 #define SUCCESS         0x2002
 317 #define FAILED          0x2003
 318 #define QUEUED          0x2004
 319 #define SOFT_ERROR      0x2005
 320 #define ADD_TO_MLQUEUE  0x2006
 321 #define TIMEOUT_ERROR   0x2007
 322
 323 /*
 324  * Midlevel queue return values.
 325  */
 326 #define SCSI_MLQUEUE_HOST_BUSY   0x1055
 327 #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
 328 #define SCSI_MLQUEUE_EH_RETRY    0x1057
 329
 330 /*
 331  *  Use these to separate status msg and our bytes
 332  *
 333  *  These are set by:
 334  *
 335  *      status byte = set from target device
 336  *      msg_byte    = return status from host adapter itself.
 337  *      host_byte   = set by low-level driver to indicate status.
 338  *      driver_byte = set by mid-level.
 339  */
 340 #define status_byte(result) (((result) >> 1) & 0x1f)
 341 #define msg_byte(result)    (((result) >> 8) & 0xff)
 342 #define host_byte(result)   (((result) >> 16) & 0xff)
 343 #define driver_byte(result) (((result) >> 24) & 0xff)
 344 #define suggestion(result)  (driver_byte(result) & SUGGEST_MASK)
 345
 346 #define sense_class(sense)  (((sense) >> 4) & 0x7)
 347 #define sense_error(sense)  ((sense) & 0xf)
 348 #define sense_valid(sense)  ((sense) & 0x80);
 349
 350
 351 #define IDENTIFY_BASE       0x80
 352 #define IDENTIFY(can_disconnect, lun)   (IDENTIFY_BASE |\
 353                      ((can_disconnect) ?  0x40 : 0) |\
 354                      ((lun) & 0x07))
 355
 356 /*
 357  *  struct scsi_device::scsi_level values. For SCSI devices other than those
 358  *  prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
 359  *  where "resp" is a byte array of the response to an INQUIRY. The scsi_level
 360  *  variable is visible to the user via sysfs.
 361  */
 362
 363 #define SCSI_UNKNOWN    0
 364 #define SCSI_1          1
 365 #define SCSI_1_CCS      2
 366 #define SCSI_2          3
 367 #define SCSI_3          4        /* SPC */
 368 #define SCSI_SPC_2      5
 369 #define SCSI_SPC_3      6
 370
 371 /*
 372  * INQ PERIPHERAL QUALIFIERS
 373  */
 374 #define SCSI_INQ_PQ_CON         0x00
 375 #define SCSI_INQ_PQ_NOT_CON     0x01
 376 #define SCSI_INQ_PQ_NOT_CAP     0x03
 377
 378
 379 /*
 380  * Here are some scsi specific ioctl commands which are sometimes useful.
 381  *
 382  * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
 383  */
 384
 385 /* Used to obtain PUN and LUN info.  Conflicts with CDROMAUDIOBUFSIZ */
 386 #define SCSI_IOCTL_GET_IDLUN            0x5382
 387
 388 /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
 389
 390 /* Used to obtain the host number of a device. */
 391 #define SCSI_IOCTL_PROBE_HOST           0x5385
 392
 393 /* Used to obtain the bus number for a device */
 394 #define SCSI_IOCTL_GET_BUS_NUMBER       0x5386
 395
 396 /* Used to obtain the PCI location of a device */
 397 #define SCSI_IOCTL_GET_PCI              0x5387
 398
 399 #endif /* _SCSI_SCSI_H */