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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 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  */
    169