linux/include/linux/chio.h
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   1/*
   2 * ioctl interface for the scsi media changer driver
   3 */
   4
   5/* changer element types */
   6#define CHET_MT   0     /* media transport element (robot) */
   7#define CHET_ST   1     /* storage element (media slots) */
   8#define CHET_IE   2     /* import/export element */
   9#define CHET_DT   3     /* data transfer element (tape/cdrom/whatever) */
  10#define CHET_V1   4     /* vendor specific #1 */
  11#define CHET_V2   5     /* vendor specific #2 */
  12#define CHET_V3   6     /* vendor specific #3 */
  13#define CHET_V4   7     /* vendor specific #4 */
  14
  15
  16/*
  17 * CHIOGPARAMS
  18 *    query changer properties
  19 *
  20 * CHIOVGPARAMS
  21 *    query vendor-specific element types
  22 *
  23 *    accessing elements works by specifing type and unit of the element.
  24 *    for example, storage elements are addressed with type = CHET_ST and
  25 *    unit = 0 .. cp_nslots-1
  26 *
  27 */
  28struct changer_params {
  29        int cp_curpicker;  /* current transport element */
  30        int cp_npickers;   /* number of transport elements      (CHET_MT) */
  31        int cp_nslots;     /* number of storage elements        (CHET_ST) */
  32        int cp_nportals;   /* number of import/export elements  (CHET_IE) */
  33        int cp_ndrives;    /* number of data transfer elements  (CHET_DT) */
  34};
  35struct changer_vendor_params {
  36        int  cvp_n1;       /* number of vendor specific elems   (CHET_V1) */
  37        char cvp_label1[16];
  38        int  cvp_n2;       /* number of vendor specific elems   (CHET_V2) */
  39        char cvp_label2[16];
  40        int  cvp_n3;       /* number of vendor specific elems   (CHET_V3) */
  41        char cvp_label3[16];
  42        int  cvp_n4;       /* number of vendor specific elems   (CHET_V4) */
  43        char cvp_label4[16];
  44        int  reserved[8];
  45};
  46
  47
  48/*
  49 * CHIOMOVE
  50 *    move a medium from one element to another
  51 */
  52struct changer_move {
  53        int cm_fromtype;        /* type/unit of source element */
  54        int cm_fromunit;        
  55        int cm_totype;  /* type/unit of destination element */
  56        int cm_tounit;
  57        int cm_flags;
  58};
  59#define CM_INVERT   1   /* flag: rotate media (for double-sided like MOD) */
  60
  61
  62/*
  63 * CHIOEXCHANGE
  64 *    move one medium from element #1 to element #2,
  65 *    and another one from element #2 to element #3.
  66 *    element #1 and #3 are allowed to be identical.
  67 */
  68struct changer_exchange {
  69        int ce_srctype;     /* type/unit of element #1 */
  70        int ce_srcunit;
  71        int ce_fdsttype;    /* type/unit of element #2 */
  72        int ce_fdstunit;
  73        int ce_sdsttype;    /* type/unit of element #3 */
  74        int ce_sdstunit;
  75        int ce_flags;
  76};
  77#define CE_INVERT1   1
  78#define CE_INVERT2   2
  79
  80
  81/*
  82 * CHIOPOSITION
  83 *    move the transport element (robot arm) to a specific element.
  84 */
  85struct changer_position {
  86        int cp_type;
  87        int cp_unit;
  88        int cp_flags;
  89};
  90#define CP_INVERT   1
  91
  92
  93/*
  94 * CHIOGSTATUS
  95 *    get element status for all elements of a specific type
  96 */
  97struct changer_element_status {
  98        int             ces_type;
  99        unsigned char   __user *ces_data;
 100};
 101#define CESTATUS_FULL     0x01 /* full */
 102#define CESTATUS_IMPEXP   0x02  /* media was imported (inserted by sysop) */
 103#define CESTATUS_EXCEPT   0x04  /* error condition */
 104#define CESTATUS_ACCESS   0x08  /* access allowed */
 105#define CESTATUS_EXENAB   0x10  /* element can export media */
 106#define CESTATUS_INENAB   0x20  /* element can import media */
 107
 108
 109/*
 110 * CHIOGELEM
 111 *    get more detailed status information for a single element
 112 */
 113struct changer_get_element {
 114        int     cge_type;        /* type/unit */
 115        int     cge_unit;
 116        int     cge_status;      /* status */
 117        int     cge_errno;       /* errno */
 118        int     cge_srctype;     /* source element of the last move/exchange */
 119        int     cge_srcunit;
 120        int     cge_id;          /* scsi id  (for data transfer elements) */
 121        int     cge_lun;         /* scsi lun (for data transfer elements) */
 122        char    cge_pvoltag[36]; /* primary volume tag */
 123        char    cge_avoltag[36]; /* alternate volume tag */
 124        int     cge_flags;
 125};
 126/* flags */
 127#define CGE_ERRNO     0x01       /* errno available       */
 128#define CGE_INVERT    0x02       /* media inverted        */
 129#define CGE_SRC       0x04       /* media src available   */
 130#define CGE_IDLUN     0x08       /* ID+LUN available      */
 131#define CGE_PVOLTAG   0x10       /* primary volume tag available */
 132#define CGE_AVOLTAG   0x20       /* alternate volume tag available */
 133
 134
 135/*
 136 * CHIOSVOLTAG
 137 *    set volume tag
 138 */
 139struct changer_set_voltag {
 140        int     csv_type;        /* type/unit */
 141        int     csv_unit;
 142        char    csv_voltag[36];  /* volume tag */
 143        int     csv_flags;
 144};
 145#define CSV_PVOLTAG   0x01       /* primary volume tag */
 146#define CSV_AVOLTAG   0x02       /* alternate volume tag */
 147#define CSV_CLEARTAG  0x04       /* clear volume tag */
 148
 149/* ioctls */
 150#define CHIOMOVE       _IOW('c', 1,struct changer_move)
 151#define CHIOEXCHANGE   _IOW('c', 2,struct changer_exchange)
 152#define CHIOPOSITION   _IOW('c', 3,struct changer_position)
 153#define CHIOGPICKER    _IOR('c', 4,int)                        /* not impl. */
 154#define CHIOSPICKER    _IOW('c', 5,int)                        /* not impl. */
 155#define CHIOGPARAMS    _IOR('c', 6,struct changer_params)
 156#define CHIOGSTATUS    _IOW('c', 8,struct changer_element_status)
 157#define CHIOGELEM      _IOW('c',16,struct changer_get_element)
 158#define CHIOINITELEM   _IO('c',17)
 159#define CHIOSVOLTAG    _IOW('c',18,struct changer_set_voltag)
 160#define CHIOGVPARAMS   _IOR('c',19,struct changer_vendor_params)
 161
 162/* ---------------------------------------------------------------------- */
 163
 164/*
 165 * Local variables:
 166 * c-basic-offset: 8
 167 * End:
 168 */
 169
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