daa6eda65a
This patch adds a device driver for scsi media changer devices. Signed-off-by: Gerd Knorr <kraxel@bytesex.org> Signed-off-by: James Bottomley <James.Bottomley@SteelEye.com>
168 lines
5.2 KiB
C
168 lines
5.2 KiB
C
/*
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* ioctl interface for the scsi media changer driver
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*/
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/* changer element types */
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#define CHET_MT 0 /* media transport element (robot) */
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#define CHET_ST 1 /* storage element (media slots) */
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#define CHET_IE 2 /* import/export element */
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#define CHET_DT 3 /* data transfer element (tape/cdrom/whatever) */
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#define CHET_V1 4 /* vendor specific #1 */
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#define CHET_V2 5 /* vendor specific #2 */
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#define CHET_V3 6 /* vendor specific #3 */
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#define CHET_V4 7 /* vendor specific #4 */
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/*
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* CHIOGPARAMS
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* query changer properties
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*
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* CHIOVGPARAMS
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* query vendor-specific element types
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*
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* accessing elements works by specifing type and unit of the element.
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* for eample, storage elements are addressed with type = CHET_ST and
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* unit = 0 .. cp_nslots-1
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*
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*/
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struct changer_params {
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int cp_curpicker; /* current transport element */
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int cp_npickers; /* number of transport elements (CHET_MT) */
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int cp_nslots; /* number of storage elements (CHET_ST) */
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int cp_nportals; /* number of import/export elements (CHET_IE) */
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int cp_ndrives; /* number of data transfer elements (CHET_DT) */
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};
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struct changer_vendor_params {
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int cvp_n1; /* number of vendor specific elems (CHET_V1) */
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char cvp_label1[16];
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int cvp_n2; /* number of vendor specific elems (CHET_V2) */
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char cvp_label2[16];
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int cvp_n3; /* number of vendor specific elems (CHET_V3) */
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char cvp_label3[16];
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int cvp_n4; /* number of vendor specific elems (CHET_V4) */
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char cvp_label4[16];
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int reserved[8];
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};
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/*
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* CHIOMOVE
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* move a medium from one element to another
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*/
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struct changer_move {
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int cm_fromtype; /* type/unit of source element */
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int cm_fromunit;
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int cm_totype; /* type/unit of destination element */
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int cm_tounit;
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int cm_flags;
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};
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#define CM_INVERT 1 /* flag: rotate media (for double-sided like MOD) */
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/*
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* CHIOEXCHANGE
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* move one medium from element #1 to element #2,
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* and another one from element #2 to element #3.
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* element #1 and #3 are allowed to be identical.
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*/
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struct changer_exchange {
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int ce_srctype; /* type/unit of element #1 */
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int ce_srcunit;
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int ce_fdsttype; /* type/unit of element #2 */
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int ce_fdstunit;
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int ce_sdsttype; /* type/unit of element #3 */
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int ce_sdstunit;
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int ce_flags;
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};
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#define CE_INVERT1 1
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#define CE_INVERT2 2
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/*
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* CHIOPOSITION
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* move the transport element (robot arm) to a specific element.
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*/
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struct changer_position {
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int cp_type;
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int cp_unit;
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int cp_flags;
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};
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#define CP_INVERT 1
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/*
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* CHIOGSTATUS
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* get element status for all elements of a specific type
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*/
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struct changer_element_status {
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int ces_type;
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unsigned char *ces_data;
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};
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#define CESTATUS_FULL 0x01 /* full */
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#define CESTATUS_IMPEXP 0x02 /* media was imported (inserted by sysop) */
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#define CESTATUS_EXCEPT 0x04 /* error condition */
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#define CESTATUS_ACCESS 0x08 /* access allowed */
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#define CESTATUS_EXENAB 0x10 /* element can export media */
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#define CESTATUS_INENAB 0x20 /* element can import media */
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/*
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* CHIOGELEM
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* get more detailed status informtion for a single element
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*/
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struct changer_get_element {
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int cge_type; /* type/unit */
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int cge_unit;
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int cge_status; /* status */
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int cge_errno; /* errno */
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int cge_srctype; /* source element of the last move/exchange */
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int cge_srcunit;
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int cge_id; /* scsi id (for data transfer elements) */
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int cge_lun; /* scsi lun (for data transfer elements) */
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char cge_pvoltag[36]; /* primary volume tag */
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char cge_avoltag[36]; /* alternate volume tag */
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int cge_flags;
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};
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/* flags */
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#define CGE_ERRNO 0x01 /* errno available */
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#define CGE_INVERT 0x02 /* media inverted */
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#define CGE_SRC 0x04 /* media src available */
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#define CGE_IDLUN 0x08 /* ID+LUN available */
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#define CGE_PVOLTAG 0x10 /* primary volume tag available */
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#define CGE_AVOLTAG 0x20 /* alternate volume tag available */
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/*
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* CHIOSVOLTAG
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* set volume tag
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*/
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struct changer_set_voltag {
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int csv_type; /* type/unit */
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int csv_unit;
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char csv_voltag[36]; /* volume tag */
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int csv_flags;
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};
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#define CSV_PVOLTAG 0x01 /* primary volume tag */
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#define CSV_AVOLTAG 0x02 /* alternate volume tag */
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#define CSV_CLEARTAG 0x04 /* clear volume tag */
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/* ioctls */
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#define CHIOMOVE _IOW('c', 1,struct changer_move)
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#define CHIOEXCHANGE _IOW('c', 2,struct changer_exchange)
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#define CHIOPOSITION _IOW('c', 3,struct changer_position)
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#define CHIOGPICKER _IOR('c', 4,int) /* not impl. */
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#define CHIOSPICKER _IOW('c', 5,int) /* not impl. */
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#define CHIOGPARAMS _IOR('c', 6,struct changer_params)
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#define CHIOGSTATUS _IOW('c', 8,struct changer_element_status)
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#define CHIOGELEM _IOW('c',16,struct changer_get_element)
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#define CHIOINITELEM _IO('c',17)
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#define CHIOSVOLTAG _IOW('c',18,struct changer_set_voltag)
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#define CHIOGVPARAMS _IOR('c',19,struct changer_vendor_params)
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/* ---------------------------------------------------------------------- */
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/*
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* Local variables:
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* c-basic-offset: 8
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* End:
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*/
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