LCOV - code coverage report
Current view: top level - lkbce/include/scsi - scsi.h (source / functions) Hit Total Coverage
Test: coverage.info Lines: 10 15 66.7 %
Date: 2017-01-25 Functions: 1 4 25.0 %

          Line data    Source code
       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             : struct scsi_cmnd;
      14             : 
      15             : /*
      16             :  * The maximum number of SG segments that we will put inside a
      17             :  * scatterlist (unless chaining is used). Should ideally fit inside a
      18             :  * single page, to avoid a higher order allocation.  We could define this
      19             :  * to SG_MAX_SINGLE_ALLOC to pack correctly at the highest order.  The
      20             :  * minimum value is 32
      21             :  */
      22             : #define SCSI_MAX_SG_SEGMENTS    128
      23             : 
      24             : /*
      25             :  * Like SCSI_MAX_SG_SEGMENTS, but for archs that have sg chaining. This limit
      26             :  * is totally arbitrary, a setting of 2048 will get you at least 8mb ios.
      27             :  */
      28             : #ifdef ARCH_HAS_SG_CHAIN
      29             : #define SCSI_MAX_SG_CHAIN_SEGMENTS      2048
      30             : #else
      31             : #define SCSI_MAX_SG_CHAIN_SEGMENTS      SCSI_MAX_SG_SEGMENTS
      32             : #endif
      33             : 
      34             : /*
      35             :  * Special value for scanning to specify scanning or rescanning of all
      36             :  * possible channels, (target) ids, or luns on a given shost.
      37             :  */
      38             : #define SCAN_WILD_CARD  ~0
      39             : 
      40             : /*
      41             :  *      SCSI opcodes
      42             :  */
      43             : 
      44             : #define TEST_UNIT_READY       0x00
      45             : #define REZERO_UNIT           0x01
      46             : #define REQUEST_SENSE         0x03
      47             : #define FORMAT_UNIT           0x04
      48             : #define READ_BLOCK_LIMITS     0x05
      49             : #define REASSIGN_BLOCKS       0x07
      50             : #define INITIALIZE_ELEMENT_STATUS 0x07
      51             : #define READ_6                0x08
      52             : #define WRITE_6               0x0a
      53             : #define SEEK_6                0x0b
      54             : #define READ_REVERSE          0x0f
      55             : #define WRITE_FILEMARKS       0x10
      56             : #define SPACE                 0x11
      57             : #define INQUIRY               0x12
      58             : #define RECOVER_BUFFERED_DATA 0x14
      59             : #define MODE_SELECT           0x15
      60             : #define RESERVE               0x16
      61             : #define RELEASE               0x17
      62             : #define COPY                  0x18
      63             : #define ERASE                 0x19
      64             : #define MODE_SENSE            0x1a
      65             : #define START_STOP            0x1b
      66             : #define RECEIVE_DIAGNOSTIC    0x1c
      67             : #define SEND_DIAGNOSTIC       0x1d
      68             : #define ALLOW_MEDIUM_REMOVAL  0x1e
      69             : 
      70             : #define SET_WINDOW            0x24
      71             : #define READ_CAPACITY         0x25
      72             : #define READ_10               0x28
      73             : #define WRITE_10              0x2a
      74             : #define SEEK_10               0x2b
      75             : #define POSITION_TO_ELEMENT   0x2b
      76             : #define WRITE_VERIFY          0x2e
      77             : #define VERIFY                0x2f
      78             : #define SEARCH_HIGH           0x30
      79             : #define SEARCH_EQUAL          0x31
      80             : #define SEARCH_LOW            0x32
      81             : #define SET_LIMITS            0x33
      82             : #define PRE_FETCH             0x34
      83             : #define READ_POSITION         0x34
      84             : #define SYNCHRONIZE_CACHE     0x35
      85             : #define LOCK_UNLOCK_CACHE     0x36
      86             : #define READ_DEFECT_DATA      0x37
      87             : #define MEDIUM_SCAN           0x38
      88             : #define COMPARE               0x39
      89             : #define COPY_VERIFY           0x3a
      90             : #define WRITE_BUFFER          0x3b
      91             : #define READ_BUFFER           0x3c
      92             : #define UPDATE_BLOCK          0x3d
      93             : #define READ_LONG             0x3e
      94             : #define WRITE_LONG            0x3f
      95             : #define CHANGE_DEFINITION     0x40
      96             : #define WRITE_SAME            0x41
      97             : #define UNMAP                 0x42
      98             : #define READ_TOC              0x43
      99             : #define LOG_SELECT            0x4c
     100             : #define LOG_SENSE             0x4d
     101             : #define XDWRITEREAD_10        0x53
     102             : #define MODE_SELECT_10        0x55
     103             : #define RESERVE_10            0x56
     104             : #define RELEASE_10            0x57
     105             : #define MODE_SENSE_10         0x5a
     106             : #define PERSISTENT_RESERVE_IN 0x5e
     107             : #define PERSISTENT_RESERVE_OUT 0x5f
     108             : #define VARIABLE_LENGTH_CMD   0x7f
     109             : #define REPORT_LUNS           0xa0
     110             : #define MAINTENANCE_IN        0xa3
     111             : #define MAINTENANCE_OUT       0xa4
     112             : #define MOVE_MEDIUM           0xa5
     113             : #define EXCHANGE_MEDIUM       0xa6
     114             : #define READ_12               0xa8
     115             : #define WRITE_12              0xaa
     116             : #define WRITE_VERIFY_12       0xae
     117             : #define SEARCH_HIGH_12        0xb0
     118             : #define SEARCH_EQUAL_12       0xb1
     119             : #define SEARCH_LOW_12         0xb2
     120             : #define READ_ELEMENT_STATUS   0xb8
     121             : #define SEND_VOLUME_TAG       0xb6
     122             : #define WRITE_LONG_2          0xea
     123             : #define READ_16               0x88
     124             : #define WRITE_16              0x8a
     125             : #define VERIFY_16             0x8f
     126             : #define WRITE_SAME_16         0x93
     127             : #define SERVICE_ACTION_IN     0x9e
     128             : /* values for service action in */
     129             : #define SAI_READ_CAPACITY_16  0x10
     130             : #define SAI_GET_LBA_STATUS    0x12
     131             : /* values for maintenance in */
     132             : #define MI_REPORT_TARGET_PGS  0x0a
     133             : /* values for maintenance out */
     134             : #define MO_SET_TARGET_PGS     0x0a
     135             : /* values for variable length command */
     136             : #define READ_32               0x09
     137             : #define WRITE_32              0x0b
     138             : #define WRITE_SAME_32         0x0d
     139             : 
     140             : /* Values for T10/04-262r7 */
     141             : #define ATA_16                0x85      /* 16-byte pass-thru */
     142             : #define ATA_12                0xa1      /* 12-byte pass-thru */
     143             : 
     144             : /*
     145             :  *      SCSI command lengths
     146             :  */
     147             : 
     148             : #define SCSI_MAX_VARLEN_CDB_SIZE 260
     149             : 
     150             : /* defined in T10 SCSI Primary Commands-2 (SPC2) */
     151             : struct scsi_varlen_cdb_hdr {
     152             :         u8 opcode;        /* opcode always == VARIABLE_LENGTH_CMD */
     153             :         u8 control;
     154             :         u8 misc[5];
     155             :         u8 additional_cdb_length;         /* total cdb length - 8 */
     156             :         __be16 service_action;
     157             :         /* service specific data follows */
     158             : };
     159             : 
     160             : static inline unsigned
     161             : scsi_varlen_cdb_length(const void *hdr)
     162             : {
     163           0 :         return ((struct scsi_varlen_cdb_hdr *)hdr)->additional_cdb_length + 8;
     164             : }
     165             : 
     166           1 : extern const unsigned char scsi_command_size_tbl[8];
     167             : #define COMMAND_SIZE(opcode) scsi_command_size_tbl[((opcode) >> 5) & 7]
     168             : 
     169             : static inline unsigned
     170             : scsi_command_size(const unsigned char *cmnd)
     171             : {
     172           0 :         return (cmnd[0] == VARIABLE_LENGTH_CMD) ?
     173           0 :                 scsi_varlen_cdb_length(cmnd) : COMMAND_SIZE(cmnd[0]);
     174             : }
     175             : 
     176             : /*
     177             :  *  SCSI Architecture Model (SAM) Status codes. Taken from SAM-3 draft
     178             :  *  T10/1561-D Revision 4 Draft dated 7th November 2002.
     179             :  */
     180             : #define SAM_STAT_GOOD            0x00
     181             : #define SAM_STAT_CHECK_CONDITION 0x02
     182             : #define SAM_STAT_CONDITION_MET   0x04
     183             : #define SAM_STAT_BUSY            0x08
     184             : #define SAM_STAT_INTERMEDIATE    0x10
     185             : #define SAM_STAT_INTERMEDIATE_CONDITION_MET 0x14
     186             : #define SAM_STAT_RESERVATION_CONFLICT 0x18
     187             : #define SAM_STAT_COMMAND_TERMINATED 0x22        /* obsolete in SAM-3 */
     188             : #define SAM_STAT_TASK_SET_FULL   0x28
     189             : #define SAM_STAT_ACA_ACTIVE      0x30
     190             : #define SAM_STAT_TASK_ABORTED    0x40
     191             : 
     192             : /** scsi_status_is_good - check the status return.
     193             :  *
     194             :  * @status: the status passed up from the driver (including host and
     195             :  *          driver components)
     196             :  *
     197             :  * This returns true for known good conditions that may be treated as
     198             :  * command completed normally
     199             :  */
     200             : static inline int scsi_status_is_good(int status)
     201             : {
     202             :         /*
     203             :          * FIXME: bit0 is listed as reserved in SCSI-2, but is
     204             :          * significant in SCSI-3.  For now, we follow the SCSI-2
     205             :          * behaviour and ignore reserved bits.
     206             :          */
     207           0 :         status &= 0xfe;
     208           0 :         return ((status == SAM_STAT_GOOD) ||
     209             :                 (status == SAM_STAT_INTERMEDIATE) ||
     210             :                 (status == SAM_STAT_INTERMEDIATE_CONDITION_MET) ||
     211             :                 /* FIXME: this is obsolete in SAM-3 */
     212             :                 (status == SAM_STAT_COMMAND_TERMINATED));
     213             : }
     214             : 
     215             : /*
     216             :  *  Status codes. These are deprecated as they are shifted 1 bit right
     217             :  *  from those found in the SCSI standards. This causes confusion for
     218             :  *  applications that are ported to several OSes. Prefer SAM Status codes
     219             :  *  above.
     220             :  */
     221             : 
     222             : #define GOOD                 0x00
     223             : #define CHECK_CONDITION      0x01
     224             : #define CONDITION_GOOD       0x02
     225             : #define BUSY                 0x04
     226             : #define INTERMEDIATE_GOOD    0x08
     227             : #define INTERMEDIATE_C_GOOD  0x0a
     228             : #define RESERVATION_CONFLICT 0x0c
     229             : #define COMMAND_TERMINATED   0x11
     230             : #define QUEUE_FULL           0x14
     231             : #define ACA_ACTIVE           0x18
     232             : #define TASK_ABORTED         0x20
     233             : 
     234             : #define STATUS_MASK          0xfe
     235             : 
     236             : /*
     237             :  *  SENSE KEYS
     238             :  */
     239             : 
     240             : #define NO_SENSE            0x00
     241             : #define RECOVERED_ERROR     0x01
     242             : #define NOT_READY           0x02
     243             : #define MEDIUM_ERROR        0x03
     244             : #define HARDWARE_ERROR      0x04
     245             : #define ILLEGAL_REQUEST     0x05
     246             : #define UNIT_ATTENTION      0x06
     247             : #define DATA_PROTECT        0x07
     248             : #define BLANK_CHECK         0x08
     249             : #define COPY_ABORTED        0x0a
     250             : #define ABORTED_COMMAND     0x0b
     251             : #define VOLUME_OVERFLOW     0x0d
     252             : #define MISCOMPARE          0x0e
     253             : 
     254             : 
     255             : /*
     256             :  *  DEVICE TYPES
     257             :  *  Please keep them in 0x%02x format for $MODALIAS to work
     258             :  */
     259             : 
     260             : #define TYPE_DISK           0x00
     261             : #define TYPE_TAPE           0x01
     262             : #define TYPE_PRINTER        0x02
     263             : #define TYPE_PROCESSOR      0x03    /* HP scanners use this */
     264             : #define TYPE_WORM           0x04    /* Treated as ROM by our system */
     265             : #define TYPE_ROM            0x05
     266             : #define TYPE_SCANNER        0x06
     267             : #define TYPE_MOD            0x07    /* Magneto-optical disk - 
     268             :                                      * - treated as TYPE_DISK */
     269             : #define TYPE_MEDIUM_CHANGER 0x08
     270             : #define TYPE_COMM           0x09    /* Communications device */
     271             : #define TYPE_RAID           0x0c
     272             : #define TYPE_ENCLOSURE      0x0d    /* Enclosure Services Device */
     273             : #define TYPE_RBC            0x0e
     274             : #define TYPE_OSD            0x11
     275             : #define TYPE_NO_LUN         0x7f
     276             : 
     277             : /* SCSI protocols; these are taken from SPC-3 section 7.5 */
     278             : enum scsi_protocol {
     279             :         SCSI_PROTOCOL_FCP = 0,  /* Fibre Channel */
     280             :         SCSI_PROTOCOL_SPI = 1,  /* parallel SCSI */
     281             :         SCSI_PROTOCOL_SSA = 2,  /* Serial Storage Architecture - Obsolete */
     282             :         SCSI_PROTOCOL_SBP = 3,  /* firewire */
     283             :         SCSI_PROTOCOL_SRP = 4,  /* Infiniband RDMA */
     284             :         SCSI_PROTOCOL_ISCSI = 5,
     285             :         SCSI_PROTOCOL_SAS = 6,
     286             :         SCSI_PROTOCOL_ADT = 7,  /* Media Changers */
     287             :         SCSI_PROTOCOL_ATA = 8,
     288             :         SCSI_PROTOCOL_UNSPEC = 0xf, /* No specific protocol */
     289             : };
     290             : 
     291             : /* Returns a human-readable name for the device */
     292             : extern const char * scsi_device_type(unsigned type);
     293             : 
     294             : /*
     295             :  * standard mode-select header prepended to all mode-select commands
     296             :  */
     297             : 
     298             : struct ccs_modesel_head {
     299             :         __u8 _r1;                       /* reserved */
     300             :         __u8 medium;            /* device-specific medium type */
     301             :         __u8 _r2;                       /* reserved */
     302             :         __u8 block_desc_length; /* block descriptor length */
     303             :         __u8 density;           /* device-specific density code */
     304             :         __u8 number_blocks_hi;  /* number of blocks in this block desc */
     305             :         __u8 number_blocks_med;
     306             :         __u8 number_blocks_lo;
     307             :         __u8 _r3;
     308             :         __u8 block_length_hi;   /* block length for blocks in this desc */
     309             :         __u8 block_length_med;
     310             :         __u8 block_length_lo;
     311             : };
     312           1 : 
     313             : /*
     314             :  * ScsiLun: 8 byte LUN.
     315             :  */
     316             : struct scsi_lun {
     317             :         __u8 scsi_lun[8];
     318             : };
     319             : 
     320             : /*
     321             :  * The Well Known LUNS (SAM-3) in our int representation of a LUN
     322             :  */
     323             : #define SCSI_W_LUN_BASE 0xc100
     324             : #define SCSI_W_LUN_REPORT_LUNS (SCSI_W_LUN_BASE + 1)
     325             : #define SCSI_W_LUN_ACCESS_CONTROL (SCSI_W_LUN_BASE + 2)
     326             : #define SCSI_W_LUN_TARGET_LOG_PAGE (SCSI_W_LUN_BASE + 3)
     327             : 
     328             : static inline int scsi_is_wlun(unsigned int lun)
     329             : {
     330          32 :         return (lun & 0xff00) == SCSI_W_LUN_BASE;
     331             : }
     332             : 
     333             : 
     334             : /*
     335             :  *  MESSAGE CODES
     336             :  */
     337             : 
     338             : #define COMMAND_COMPLETE    0x00
     339             : #define EXTENDED_MESSAGE    0x01
     340             : #define     EXTENDED_MODIFY_DATA_POINTER    0x00
     341             : #define     EXTENDED_SDTR                   0x01
     342             : #define     EXTENDED_EXTENDED_IDENTIFY      0x02    /* SCSI-I only */
     343             : #define     EXTENDED_WDTR                   0x03
     344             : #define     EXTENDED_PPR                    0x04
     345             : #define     EXTENDED_MODIFY_BIDI_DATA_PTR   0x05
     346             : #define SAVE_POINTERS       0x02
     347             : #define RESTORE_POINTERS    0x03
     348             : #define DISCONNECT          0x04
     349             : #define INITIATOR_ERROR     0x05
     350             : #define ABORT_TASK_SET      0x06
     351             : #define MESSAGE_REJECT      0x07
     352             : #define NOP                 0x08
     353             : #define MSG_PARITY_ERROR    0x09
     354             : #define LINKED_CMD_COMPLETE 0x0a
     355             : #define LINKED_FLG_CMD_COMPLETE 0x0b
     356             : #define TARGET_RESET        0x0c
     357             : #define ABORT_TASK          0x0d
     358             : #define CLEAR_TASK_SET      0x0e
     359             : #define INITIATE_RECOVERY   0x0f            /* SCSI-II only */
     360             : #define RELEASE_RECOVERY    0x10            /* SCSI-II only */
     361             : #define CLEAR_ACA           0x16
     362             : #define LOGICAL_UNIT_RESET  0x17
     363             : #define SIMPLE_QUEUE_TAG    0x20
     364             : #define HEAD_OF_QUEUE_TAG   0x21
     365             : #define ORDERED_QUEUE_TAG   0x22
     366             : #define IGNORE_WIDE_RESIDUE 0x23
     367             : #define ACA                 0x24
     368             : #define QAS_REQUEST         0x55
     369             : 
     370             : /* Old SCSI2 names, don't use in new code */
     371             : #define BUS_DEVICE_RESET    TARGET_RESET
     372             : #define ABORT               ABORT_TASK_SET
     373             : 
     374             : /*
     375             :  * Host byte codes
     376             :  */
     377             : 
     378             : #define DID_OK          0x00    /* NO error                                */
     379             : #define DID_NO_CONNECT  0x01    /* Couldn't connect before timeout period  */
     380             : #define DID_BUS_BUSY    0x02    /* BUS stayed busy through time out period */
     381             : #define DID_TIME_OUT    0x03    /* TIMED OUT for other reason              */
     382             : #define DID_BAD_TARGET  0x04    /* BAD target.                             */
     383             : #define DID_ABORT       0x05    /* Told to abort for some other reason     */
     384             : #define DID_PARITY      0x06    /* Parity error                            */
     385             : #define DID_ERROR       0x07    /* Internal error                          */
     386             : #define DID_RESET       0x08    /* Reset by somebody.                      */
     387             : #define DID_BAD_INTR    0x09    /* Got an interrupt we weren't expecting.  */
     388             : #define DID_PASSTHROUGH 0x0a    /* Force command past mid-layer            */
     389             : #define DID_SOFT_ERROR  0x0b    /* The low level driver just wish a retry  */
     390             : #define DID_IMM_RETRY   0x0c    /* Retry without decrementing retry count  */
     391             : #define DID_REQUEUE     0x0d    /* Requeue command (no immediate retry) also
     392             :                                  * without decrementing the retry count    */
     393             : #define DID_TRANSPORT_DISRUPTED 0x0e /* Transport error disrupted execution
     394             :                                       * and the driver blocked the port to
     395             :                                       * recover the link. Transport class will
     396             :                                       * retry or fail IO */
     397             : #define DID_TRANSPORT_FAILFAST  0x0f /* Transport class fastfailed the io */
     398             : #define DRIVER_OK       0x00    /* Driver status                           */
     399             : 
     400             : /*
     401             :  *  These indicate the error that occurred, and what is available.
     402             :  */
     403             : 
     404             : #define DRIVER_BUSY         0x01
     405             : #define DRIVER_SOFT         0x02
     406             : #define DRIVER_MEDIA        0x03
     407             : #define DRIVER_ERROR        0x04
     408             : 
     409             : #define DRIVER_INVALID      0x05
     410             : #define DRIVER_TIMEOUT      0x06
     411             : #define DRIVER_HARD         0x07
     412             : #define DRIVER_SENSE        0x08
     413             : 
     414             : /*
     415             :  * Internal return values.
     416             :  */
     417             : 
     418             : #define NEEDS_RETRY     0x2001
     419             : #define SUCCESS         0x2002
     420             : #define FAILED          0x2003
     421             : #define QUEUED          0x2004
     422             : #define SOFT_ERROR      0x2005
     423             : #define ADD_TO_MLQUEUE  0x2006
     424             : #define TIMEOUT_ERROR   0x2007
     425             : #define SCSI_RETURN_NOT_HANDLED   0x2008
     426             : 
     427             : /*
     428             :  * Midlevel queue return values.
     429             :  */
     430             : #define SCSI_MLQUEUE_HOST_BUSY   0x1055
     431             : #define SCSI_MLQUEUE_DEVICE_BUSY 0x1056
     432             : #define SCSI_MLQUEUE_EH_RETRY    0x1057
     433             : #define SCSI_MLQUEUE_TARGET_BUSY 0x1058
     434             : 
     435             : /*
     436             :  *  Use these to separate status msg and our bytes
     437             :  *
     438             :  *  These are set by:
     439             :  *
     440             :  *      status byte = set from target device
     441             :  *      msg_byte    = return status from host adapter itself.
     442             :  *      host_byte   = set by low-level driver to indicate status.
     443             :  *      driver_byte = set by mid-level.
     444             :  */
     445             : #define status_byte(result) (((result) >> 1) & 0x7f)
     446             : #define msg_byte(result)    (((result) >> 8) & 0xff)
     447             : #define host_byte(result)   (((result) >> 16) & 0xff)
     448             : #define driver_byte(result) (((result) >> 24) & 0xff)
     449             : 
     450             : #define sense_class(sense)  (((sense) >> 4) & 0x7)
     451             : #define sense_error(sense)  ((sense) & 0xf)
     452             : #define sense_valid(sense)  ((sense) & 0x80);
     453             : 
     454             : /*
     455             :  * default timeouts
     456             : */
     457             : #define FORMAT_UNIT_TIMEOUT             (2 * 60 * 60 * HZ)
     458             : #define START_STOP_TIMEOUT              (60 * HZ)
     459             : #define MOVE_MEDIUM_TIMEOUT             (5 * 60 * HZ)
     460             : #define READ_ELEMENT_STATUS_TIMEOUT     (5 * 60 * HZ)
     461             : #define READ_DEFECT_DATA_TIMEOUT        (60 * HZ )
     462             : 
     463             : 
     464             : #define IDENTIFY_BASE       0x80
     465             : #define IDENTIFY(can_disconnect, lun)   (IDENTIFY_BASE |\
     466             :                      ((can_disconnect) ?  0x40 : 0) |\
     467             :                      ((lun) & 0x07))
     468             : 
     469             : /*
     470             :  *  struct scsi_device::scsi_level values. For SCSI devices other than those
     471             :  *  prior to SCSI-2 (i.e. over 12 years old) this value is (resp[2] + 1)
     472             :  *  where "resp" is a byte array of the response to an INQUIRY. The scsi_level
     473             :  *  variable is visible to the user via sysfs.
     474             :  */
     475             : 
     476             : #define SCSI_UNKNOWN    0
     477             : #define SCSI_1          1
     478             : #define SCSI_1_CCS      2
     479             : #define SCSI_2          3
     480             : #define SCSI_3          4        /* SPC */
     481             : #define SCSI_SPC_2      5
     482             : #define SCSI_SPC_3      6
     483             : 
     484             : /*
     485             :  * INQ PERIPHERAL QUALIFIERS
     486             :  */
     487             : #define SCSI_INQ_PQ_CON         0x00
     488             : #define SCSI_INQ_PQ_NOT_CON     0x01
     489             : #define SCSI_INQ_PQ_NOT_CAP     0x03
     490             : 
     491             : 
     492             : /*
     493             :  * Here are some scsi specific ioctl commands which are sometimes useful.
     494             :  *
     495             :  * Note that include/linux/cdrom.h also defines IOCTL 0x5300 - 0x5395
     496             :  */
     497             : 
     498             : /* Used to obtain PUN and LUN info.  Conflicts with CDROMAUDIOBUFSIZ */
     499             : #define SCSI_IOCTL_GET_IDLUN            0x5382
     500             : 
     501             : /* 0x5383 and 0x5384 were used for SCSI_IOCTL_TAGGED_{ENABLE,DISABLE} */
     502             : 
     503             : /* Used to obtain the host number of a device. */
     504             : #define SCSI_IOCTL_PROBE_HOST           0x5385
     505             : 
     506             : /* Used to obtain the bus number for a device */
     507             : #define SCSI_IOCTL_GET_BUS_NUMBER       0x5386
     508             : 
     509             : /* Used to obtain the PCI location of a device */
     510             : #define SCSI_IOCTL_GET_PCI              0x5387
     511             : 
     512             : /* Pull a u32 out of a SCSI message (using BE SCSI conventions) */
     513             : static inline __u32 scsi_to_u32(__u8 *ptr)
     514             : {
     515             :         return (ptr[0]<<24) + (ptr[1]<<16) + (ptr[2]<<8) + ptr[3];
     516             : }
     517           1 : 
     518           1 : #endif /* _SCSI_SCSI_H */

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