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 */