include/linux/chio.h

   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 eample, storage elements are addressed with type = CHET_ST and
  25  *    unit = 0 .. cp_nslots-1
  26  *
  27  */
  28 struct 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 };
  35 struct 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  */
  52 struct 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  */
  68 struct 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  */
  85 struct 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  */
  97 struct changer_element_status {
  98         int             ces_type;
  99         unsigned char   *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 informtion for a single element
 112  */
 113 struct 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  */
 139 struct 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  */