linux/include/scsi/scsi.h
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   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#include <linux/scatterlist.h>
  13
  14struct scsi_cmnd;
  15
  16/*
  17 * The maximum number of SG segments that we will put inside a
  18 * scatterlist (unless chaining is used). Should ideally fit inside a
  19 * single page, to avoid a higher order allocation.  We could define this
  20 * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
  21 * minimum value is 32
  22 */
  23#define SCSI_MAX_SG_SEGMENTS    128
  24
  25/*
  26 * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
  27 * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
  28 */
  29#ifdef ARCH_HAS_SG_CHAIN
  30#define SCSI_MAX_SG_CHAIN_SEGMENTS      2048
  31#else
  32#define SCSI_MAX_SG_CHAIN_SEGMENTS      SCSI_MAX_SG_SEGMENTS
  33#endif
  34
  35/*
  36 * DIX-capable adapters effectively support infinite chaining for the
  37 * protection information scatterlist
  38 */
  39#define SCSI_MAX_PROT_SG_SEGMENTS       0xFFFF
  40
  41/*
  42 * Special value for scanning to specify scanning or rescanning of all
  43 * possible channels, (target) ids, or luns on a given shost.
  44 */
  45#define SCAN_WILD_CARD  ~0
  46
  47/*
  48 *      SCSI opcodes
  49 */
  50
  51#define TEST_UNIT_READY       0x00
  52#define REZERO_UNIT           0x01
  53#define REQUEST_SENSE         0x03
  54#define FORMAT_UNIT           0x04
  55#define READ_BLOCK_LIMITS     0x05
  56#define REASSIGN_BLOCKS       0x07
  57#define INITIALIZE_ELEMENT_STATUS 0x07
  58#define READ_6                0x08
  59#define WRITE_6               0x0a
  60#define SEEK_6                0x0b
  61#define READ_REVERSE          0x0f
  62#define WRITE_FILEMARKS       0x10
  63#define SPACE                 0x11
  64#define INQUIRY               0x12
  65#define RECOVER_BUFFERED_DATA 0x14
  66#define MODE_SELECT           0x15
  67#define RESERVE               0x16
  68#define RELEASE               0x17
  69#define COPY                  0x18
  70#define ERASE                 0x19
  71#define MODE_SENSE            0x1a
  72#define START_STOP            0x1b
  73#define RECEIVE_DIAGNOSTIC    0x1c
  74#define SEND_DIAGNOSTIC       0x1d
  75#define ALLOW_MEDIUM_REMOVAL  0x1e
  76
  77#define READ_FORMAT_CAPACITIES 0x23
  78#define SET_WINDOW            0x24
  79#define READ_CAPACITY         0x25
  80#define READ_10               0x28
  81#define WRITE_10              0x2a
  82#define SEEK_10               0x2b
  83#define POSITION_TO_ELEMENT   0x2b
  84#define WRITE_VERIFY          0x2e
  85#define VERIFY                0x2f
  86#define SEARCH_HIGH           0x30
  87#define SEARCH_EQUAL          0x31
  88#define SEARCH_LOW            0x32
  89#define SET_LIMITS            0x33
  90#define PRE_FETCH             0x34
  91#define READ_POSITION         0x34
  92#define SYNCHRONIZE_CACHE     0x35
  93#define LOCK_UNLOCK_CACHE     0x36
  94#define READ_DEFECT_DATA      0x37
  95#define MEDIUM_SCAN           0x38
  96#define COMPARE               0x39
  97#define COPY_VERIFY           0x3a
  98#define WRITE_BUFFER          0x3b
  99#define READ_BUFFER           0x3c
 100#define UPDATE_BLOCK          0x3d
 101#define READ_LONG             0x3e
 102#define WRITE_LONG            0x3f
 103#define CHANGE_DEFINITION     0x40
 104#define WRITE_SAME            0x41
 105#define UNMAP                 0x42
 106#define READ_TOC              0x43
 107#define READ_HEADER           0x44
 108#define GET_EVENT_STATUS_NOTIFICATION 0x4a
 109#define LOG_SELECT            0x4c
 110#define LOG_SENSE             0x4d
 111#define XDWRITEREAD_10        0x53
 112#define MODE_SELECT_10        0x55
 113#define RESERVE_10            0x56
 114#define RELEASE_10            0x57
 115#define MODE_SENSE_10         0x5a
 116#define PERSISTENT_RESERVE_IN 0x5e
 117#define PERSISTENT_RESERVE_OUT 0x5f
 118#define VARIABLE_LENGTH_CMD   0x7f
 119#define REPORT_LUNS           0xa0
 120#define SECURITY_PROTOCOL_IN  0xa2
 121#define MAINTENANCE_IN        0xa3
 122#define MAINTENANCE_OUT       0xa4
 123#define MOVE_MEDIUM           0xa5
 124#define EXCHANGE_MEDIUM       0xa6
 125#define READ_12               0xa8
 126#define WRITE_12              0xaa
 127#define READ_MEDIA_SERIAL_NUMBER 0xab
 128#define WRITE_VERIFY_12       0xae
 129#define VERIFY_12             0xaf
 130#define SEARCH_HIGH_12        0xb0
 131#define SEARCH_EQUAL_12       0xb1
 132#define SEARCH_LOW_12         0xb2
 133#define SECURITY_PROTOCOL_OUT 0xb5
 134#define READ_ELEMENT_STATUS   0xb8
 135#define SEND_VOLUME_TAG       0xb6
 136#define WRITE_LONG_2          0xea
 137#define EXTENDED_COPY         0x83
 138#define RECEIVE_COPY_RESULTS  0x84
 139#define ACCESS_CONTROL_IN     0x86
 140#define ACCESS_CONTROL_OUT    0x87
 141#define READ_16               0x88
 142#define WRITE_16              0x8a
 143#define READ_ATTRIBUTE        0x8c
 144#define WRITE_ATTRIBUTE       0x8d
 145#define VERIFY_16             0x8f
 146#define SYNCHRONIZE_CACHE_16  0x91
 147#define WRITE_SAME_16         0x93
 148#define SERVICE_ACTION_IN     0x9e
 149/* values for service action in */
 150#define SAI_READ_CAPACITY_16  0x10
 151#define SAI_GET_LBA_STATUS    0x12
 152/* values for VARIABLE_LENGTH_CMD service action codes
 153 * see spc4r17 Section D.3.5, table D.7 and D.8 */
 154#define VLC_SA_RECEIVE_CREDENTIAL 0x1800
 155/* values for maintenance in */
 156#define MI_REPORT_IDENTIFYING_INFORMATION 0x05
 157#define MI_REPORT_TARGET_PGS  0x0a
 158#define MI_REPORT_ALIASES     0x0b
 159#define MI_REPORT_SUPPORTED_OPERATION_CODES 0x0c
 160#define MI_REPORT_SUPPORTED_TASK_MANAGEMENT_FUNCTIONS 0x0d
 161#define MI_REPORT_PRIORITY   0x0e
 162#define MI_REPORT_TIMESTAMP  0x0f
 163#define MI_MANAGEMENT_PROTOCOL_IN 0x10
 164/* value for MI_REPORT_TARGET_PGS ext header */
 165#define MI_EXT_HDR_PARAM_FMT  0x20
 166/* values for maintenance out */
 167#define MO_SET_IDENTIFYING_INFORMATION 0x06
 168#define MO_SET_TARGET_PGS     0x0a
 169#define MO_CHANGE_ALIASES     0x0b
 170#define MO_SET_PRIORITY       0x0e
 171#define MO_SET_TIMESTAMP      0x0f
 172#define MO_MANAGEMENT_PROTOCOL_OUT 0x10
 173/* values for variable length command */
 174#define XDREAD_32             0x03
 175#define XDWRITE_32            0x04
 176#define XPWRITE_32            0x06
 177#define XDWRITEREAD_32        0x07
 178#define READ_32               0x09
 179#define VERIFY_32             0x0a
 180#define WRITE_32              0x0b
 181#define WRITE_SAME_32         0x0d
 182
 183/* Values for T10/04-262r7 */
 184#define ATA_16                0x85      /* 16-byte pass-thru */
 185#define ATA_12                0xa1      /* 12-byte pass-thru */
 186
 187/*
 188 *      SCSI command lengths
 189 */
 190
 191#define SCSI_MAX_VARLEN_CDB_SIZE 260
 192
 193/* defined in T10 SCSI Primary Commands-2 (SPC2) */
 194struct scsi_varlen_cdb_hdr {
 195        __u8 opcode;        /* opcode always == VARIABLE_LENGTH_CMD */
 196        __u8 control;
 197        __u8 misc[5];
 198        __u8 additional_cdb_length;         /* total cdb length - 8 */
 199        __be16 service_action;
 200        /* service specific data follows */
 201};
 202
 203static inline unsigned
 204scsi_varlen_cdb_length(const void *hdr)
 205{
 206        return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
 207}
 208
 209extern const unsigned char scsi_command_size_tbl[8];
 210#define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
 211
 212static inline unsigned
 213scsi_command_size(const unsigned char *cmnd)
 214{
 215        return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
 216                scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
 217}
 218
 219#ifdef CONFIG_ACPI
 220struct acpi_bus_type;
 221
 222extern int
 223scsi_register_acpi_bus_type(struct acpi_bus_type *bus);
 224
 225extern void
 226scsi_unregister_acpi_bus_type(struct acpi_bus_type *bus);
 227#endif
 228
 229/*
 230 *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
 231 *  T10/1561-D Revision 4 Draft dated 7th November 2002.
 232 */
 233#define SAM_STAT_GOOD            0x00
 234#define SAM_STAT_CHECK_CONDITION 0x02
 235#define SAM_STAT_CONDITION_MET   0x04
 236#define SAM_STAT_BUSY            0x08
 237#define SAM_STAT_INTERMEDIATE    0x10
 238#define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
 239#define SAM_STAT_RESERVATION_CONFLICT 0x18
 240#define SAM_STAT_COMMAND_TERMINATED 0x22        /* obsolete in SAM-3 */
 241#define SAM_STAT_TASK_SET_FULL   0x28
 242#define SAM_STAT_ACA_ACTIVE      0x30
 243#define SAM_STAT_TASK_ABORTED    0x40
 244
 245/** scsi_status_is_good - check the status return.
 246 *
 247 * @status: the status passed up from the driver (including host and
 248 *          driver components)
 249 *
 250 * This returns true for known good conditions that may be treated as
 251 * command completed normally
 252 */
 253static inline int scsi_status_is_good(int status)
 254{
 255        /*
 256         * FIXME: bit0 is listed as reserved in SCSI-2, but is
 257         * significant in SCSI-3.  For now, we follow the SCSI-2
 258         * behaviour and ignore reserved bits.
 259         */
 260        status &= 0xfe;
 261        return ((status == SAM_STAT_GOOD) ||
 262                (status == SAM_STAT_INTERMEDIATE) ||
 263                (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
 264                /* FIXME: this is obsolete in SAM-3 */
 265                (status == SAM_STAT_COMMAND_TERMINATED));
 266}
 267
 268/*
 269 *  Status codes. These are deprecated as they are shifted 1 bit right
 270 *  from those found in the SCSI standards. This causes confusion for
 271 *  applications that are ported to several OSes. Prefer SAM Status codes
 272 *  above.
 273 */
 274
 275#define GOOD                 0x00
 276#define CHECK_CONDITION      0x01
 277#define CONDITION_GOOD       0x02
 278#define BUSY                 0x04
 279#define INTERMEDIATE_GOOD    0x08
 280#define INTERMEDIATE_C_GOOD  0x0a
 281#define RESERVATION_CONFLICT 0x0c
 282#define COMMAND_TERMINATED   0x11
 283#define QUEUE_FULL           0x14
 284#define ACA_ACTIVE           0x18
 285#define TASK_ABORTED         0x20
 286
 287#define STATUS_MASK          0xfe
 288
 289/*
 290 *  SENSE KEYS
 291 */
 292
 293#define NO_SENSE            0x00
 294#define RECOVERED_ERROR     0x01
 295#define NOT_READY           0x02
 296#define MEDIUM_ERROR        0x03
 297#define HARDWARE_ERROR      0x04
 298#define ILLEGAL_REQUEST     0x05
 299#define UNIT_ATTENTION      0x06
 300#define DATA_PROTECT        0x07
 301#define BLANK_CHECK         0x08
 302#define COPY_ABORTED        0x0a
 303#define ABORTED_COMMAND     0x0b
 304#define VOLUME_OVERFLOW     0x0d
 305#define MISCOMPARE          0x0e
 306
 307
 308/*
 309 *  DEVICE TYPES
 310 *  Please keep them in 0x%02x format for $MODALIAS to work
 311 */
 312
 313#define TYPE_DISK           0x00
 314#define TYPE_TAPE           0x01
 315#define TYPE_PRINTER        0x02
 316#define TYPE_PROCESSOR      0x03    /* HP scanners use this */
 317#define TYPE_WORM           0x04    /* Treated as ROM by our system */
 318#define TYPE_ROM            0x05
 319#define TYPE_SCANNER        0x06
 320#define TYPE_MOD            0x07    /* Magneto-optical disk - 
 321                                     * - treated as TYPE_DISK */
 322#define TYPE_MEDIUM_CHANGER 0x08
 323#define TYPE_COMM           0x09    /* Communications device */
 324#define TYPE_RAID           0x0c
 325#define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
 326#define TYPE_RBC            0x0e
 327#define TYPE_OSD            0x11
 328#define TYPE_NO_LUN         0x7f
 329
 330/* SCSI protocols; these are taken from SPC-3 section 7.5 */
 331enum scsi_protocol {
 332        SCSI_PROTOCOL_FCP = 0,  /* Fibre Channel */
 333        SCSI_PROTOCOL_SPI = 1,  /* parallel SCSI */
 334        SCSI_PROTOCOL_SSA = 2,  /* Serial Storage Architecture - Obsolete */
 335        SCSI_PROTOCOL_SBP = 3,  /* firewire */
 336        SCSI_PROTOCOL_SRP = 4,  /* Infiniband RDMA */
 337        SCSI_PROTOCOL_ISCSI = 5,
 338        SCSI_PROTOCOL_SAS = 6,
 339        SCSI_PROTOCOL_ADT = 7,  /* Media Changers */
 340        SCSI_PROTOCOL_ATA = 8,
 341        SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
 342};
 343
 344/* Returns a human-readable name for the device */
 345extern const char * scsi_device_type(unsigned type);
 346
 347/*
 348 * standard mode-select header prepended to all mode-select commands
 349 */
 350
 351struct ccs_modesel_head {
 352        __u8 _r1;                       /* reserved */
 353        __u8 medium;            /* device-specific medium type */
 354        __u8 _r2;                       /* reserved */
 355        __u8 block_desc_length; /* block descriptor length */
 356        __u8 density;           /* device-specific density code */
 357        __u8 number_blocks_hi;  /* number of blocks in this block desc */
 358        __u8 number_blocks_med;
 359        __u8 number_blocks_lo;
 360        __u8 _r3;
 361        __u8 block_length_hi;   /* block length for blocks in this desc */
 362        __u8 block_length_med;
 363        __u8 block_length_lo;
 364};
 365
 366/*
 367 * ScsiLun: 8 byte LUN.
 368 */
 369struct scsi_lun {
 370        __u8 scsi_lun[8];
 371};
 372
 373/*
 374 * The Well Known LUNS (SAM-3) in our int representation of a LUN
 375 */
 376#define SCSI_W_LUN_BASE 0xc100
 377#define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
 378#define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
 379#define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
 380
 381static inline int scsi_is_wlun(unsigned int lun)
 382{
 383        return (lun & 0xff00) == SCSI_W_LUN_BASE;
 384}
 385
 386
 387/*
 388 *  MESSAGE CODES
 389 */
 390
 391#define COMMAND_COMPLETE    0x00
 392#define EXTENDED_MESSAGE    0x01
 393#define     EXTENDED_MODIFY_DATA_POINTER    0x00
 394#define     EXTENDED_SDTR                   0x01
 395#define     EXTENDED_EXTENDED_IDENTIFY      0x02    /* SCSI-I only */
 396#define     EXTENDED_WDTR                   0x03
 397#define     EXTENDED_PPR                    0x04
 398#define     EXTENDED_MODIFY_BIDI_DATA_PTR   0x05
 399#define SAVE_POINTERS       0x02
 400#define RESTORE_POINTERS    0x03
 401#define DISCONNECT          0x04
 402#define INITIATOR_ERROR     0x05
 403#define ABORT_TASK_SET      0x06
 404#define MESSAGE_REJECT      0x07
 405#define NOP                 0x08
 406#define MSG_PARITY_ERROR    0x09
 407#define LINKED_CMD_COMPLETE 0x0a
 408#define LINKED_FLG_CMD_COMPLETE 0x0b
 409#define TARGET_RESET        0x0c
 410#define ABORT_TASK          0x0d
 411#define CLEAR_TASK_SET      0x0e
 412#define INITIATE_RECOVERY   0x0f            /* SCSI-II only */
 413#define RELEASE_RECOVERY    0x10            /* SCSI-II only */
 414#define CLEAR_ACA           0x16
 415#define LOGICAL_UNIT_RESET  0x17
 416#define SIMPLE_QUEUE_TAG    0x20
 417#define HEAD_OF_QUEUE_TAG   0x21
 418#define ORDERED_QUEUE_TAG   0x22
 419#define IGNORE_WIDE_RESIDUE 0x23
 420#define ACA                 0x24
 421#define QAS_REQUEST         0x55
 422
 423/* Old SCSI2 names, don't use in new code */
 424#define BUS_DEVICE_RESET    TARGET_RESET
 425#define ABORT               ABORT_TASK_SET
 426
 427/*
 428 * Host byte codes
 429 */
 430
 431#define DID_OK          0x00    /* NO error                                */
 432#define DID_NO_CONNECT  0x01    /* Couldn't connect before timeout period  */
 433#define DID_BUS_BUSY    0x02    /* BUS stayed busy through time out period */
 434#define DID_TIME_OUT    0x03    /* TIMED OUT for other reason              */
 435#define DID_BAD_TARGET  0x04    /* BAD target.                             */
 436#define DID_ABORT       0x05    /* Told to abort for some other reason     */
 437#define DID_PARITY      0x06    /* Parity error                            */
 438#define DID_ERROR       0x07    /* Internal error                          */
 439#define DID_RESET       0x08    /* Reset by somebody.                      */
 440#define DID_BAD_INTR    0x09    /* Got an interrupt we weren't expecting.  */
 441#define DID_PASSTHROUGH 0x0a    /* Force command past mid-layer            */
 442#define DID_SOFT_ERROR  0x0b    /* The low level driver just wish a retry  */
 443#define DID_IMM_RETRY   0x0c    /* Retry without decrementing retry count  */
 444#define DID_REQUEUE     0x0d    /* Requeue command (no immediate retry) also
 445                                 * without decrementing the retry count    */
 446#define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
 447                                      * and the driver blocked the port to
 448                                      * recover the link. Transport class will
 449                                      * retry or fail IO */
 450#define DID_TRANSPORT_FAILFAST  0x0f /* Transport class fastfailed the io */
 451#define DID_TARGET_FAILURE 0x10 /* Permanent target failure, do not retry on
 452                                 * other paths */
 453#define DID_NEXUS_FAILURE 0x11  /* Permanent nexus failure, retry on other
 454                                 * paths might yield different results */
 455#define DRIVER_OK       0x00    /* Driver status                           */
 456
 457/*
 458 *  These indicate the error that occurred, and what is available.
 459 */
 460
 461#define DRIVER_BUSY         0x01
 462#define DRIVER_SOFT         0x02
 463#define DRIVER_MEDIA        0x03
 464#define DRIVER_ERROR        0x04
 465
 466#define DRIVER_INVALID      0x05
 467#define DRIVER_TIMEOUT      0x06
 468#define DRIVER_HARD         0x07
 469#define DRIVER_SENSE        0x08
 470
 471/*
 472 * Internal return values.
 473 */
 474
 475#define NEEDS_RETRY     0x2001
 476#define SUCCESS         0x2002
 477#define FAILED          0x2003
 478#define QUEUED          0x2004
 479#define SOFT_ERROR      0x2005
 480#define ADD_TO_MLQUEUE  0x2006
 481#define TIMEOUT_ERROR   0x2007
 482#define SCSI_RETURN_NOT_HANDLED   0x2008
 483#define FAST_IO_FAIL    0x2009
 484#define TARGET_ERROR    0x200A
 485
 486/*
 487 * Midlevel queue return values.
 488 */
 489#define SCSI_MLQUEUE_HOST_BUSY   0x1055
 490#define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
 491#define SCSI_MLQUEUE_EH_RETRY    0x1057
 492#define SCSI_MLQUEUE_TARGET_BUSY 0x1058
 493
 494/*
 495 *  Use these to separate status msg and our bytes
 496 *
 497 *  These are set by:
 498 *
 499 *      status byte = set from target device
 500 *      msg_byte    = return status from host adapter itself.
 501 *      host_byte   = set by low-level driver to indicate status.
 502 *      driver_byte = set by mid-level.
 503 */
 504#define status_byte(result) (((result) >> 1) & 0x7f)
 505#define msg_byte(result)    (((result) >> 8) & 0xff)
 506#define host_byte(result)   (((result) >> 16) & 0xff)
 507#define driver_byte(result) (((result) >> 24) & 0xff)
 508
 509#define sense_class(sense)  (((sense) >> 4) & 0x7)
 510#define sense_error(sense)  ((sense) & 0xf)
 511#define sense_valid(sense)  ((sense) & 0x80)
 512
 513/*
 514 * default timeouts
 515*/
 516#define FORMAT_UNIT_TIMEOUT             (2 * 60 * 60 * HZ)
 517#define START_STOP_TIMEOUT              (60 * HZ)
 518#define MOVE_MEDIUM_TIMEOUT             (5 * 60 * HZ)
 519#define READ_ELEMENT_STATUS_TIMEOUT     (5 * 60 * HZ)
 520#define READ_DEFECT_DATA_TIMEOUT        (60 * HZ )
 521
 522
 523#define IDENTIFY_BASE       0x80
 524#define IDENTIFY(can_disconnect, lun)   (IDENTIFY_BASE |\
 525                     ((can_disconnect) ?  0x40 : 0) |\
 526                     ((lun) & 0x07))
 527
 528/*
 529 *  struct scsi_device::scsi_level values. For SCSI devices other than those
 530 *  prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
 531 *  where "resp" is a byte array of the response to an INQUIRY. The scsi_level
 532 *  variable is visible to the user via sysfs.
 533 */
 534
 535#define SCSI_UNKNOWN    0
 536#define SCSI_1          1
 537#define SCSI_1_CCS      2
 538#define SCSI_2          3
 539#define SCSI_3          4        /* SPC */
 540#define SCSI_SPC_2      5
 541#define SCSI_SPC_3      6
 542
 543/*
 544 * INQ PERIPHERAL QUALIFIERS
 545 */
 546#define SCSI_INQ_PQ_CON         0x00
 547#define SCSI_INQ_PQ_NOT_CON     0x01
 548#define SCSI_INQ_PQ_NOT_CAP     0x03
 549
 550
 551/*
 552 * Here are some scsi specific ioctl commands which are sometimes useful.
 553 *
 554 * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
 555 */
 556
 557/* Used to obtain PUN and LUN info.  Conflicts with CDROMAUDIOBUFSIZ */
 558#define SCSI_IOCTL_GET_IDLUN            0x5382
 559
 560/* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
 561
 562/* Used to obtain the host number of a device. */
 563#define SCSI_IOCTL_PROBE_HOST           0x5385
 564
 565/* Used to obtain the bus number for a device */
 566#define SCSI_IOCTL_GET_BUS_NUMBER       0x5386
 567
 568/* Used to obtain the PCI location of a device */
 569#define SCSI_IOCTL_GET_PCI              0x5387
 570
 571/* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
 572static inline __u32 scsi_to_u32(__u8 *ptr)
 573{
 574        return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
 575}
 576
 577#endif /* _SCSI_SCSI_H */
 578
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