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authorGerd Knorr <kraxel@bytesex.org>2005-05-10 10:59:13 +0200
committerJames Bottomley <jejb@mulgrave.(none)>2005-05-20 12:53:50 -0500
commitdaa6eda65a53e5addf86c6bc829129ff51b08bda (patch)
tree19ecc387d09110aedc9f48927b78079f3f595ace /include/linux/chio.h
parent5cbf5eaef7e4430f60844748fd33e22a5fb15167 (diff)
downloadop-kernel-dev-daa6eda65a53e5addf86c6bc829129ff51b08bda.zip
op-kernel-dev-daa6eda65a53e5addf86c6bc829129ff51b08bda.tar.gz
[SCSI] add scsi changer driver
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>
Diffstat (limited to 'include/linux/chio.h')
-rw-r--r--include/linux/chio.h168
1 files changed, 168 insertions, 0 deletions
diff --git a/include/linux/chio.h b/include/linux/chio.h
new file mode 100644
index 0000000..63035ae
--- /dev/null
+++ b/include/linux/chio.h
@@ -0,0 +1,168 @@
+/*
+ * ioctl interface for the scsi media changer driver
+ */
+
+/* changer element types */
+#define CHET_MT 0 /* media transport element (robot) */
+#define CHET_ST 1 /* storage element (media slots) */
+#define CHET_IE 2 /* import/export element */
+#define CHET_DT 3 /* data transfer element (tape/cdrom/whatever) */
+#define CHET_V1 4 /* vendor specific #1 */
+#define CHET_V2 5 /* vendor specific #2 */
+#define CHET_V3 6 /* vendor specific #3 */
+#define CHET_V4 7 /* vendor specific #4 */
+
+
+/*
+ * CHIOGPARAMS
+ * query changer properties
+ *
+ * CHIOVGPARAMS
+ * query vendor-specific element types
+ *
+ * accessing elements works by specifing type and unit of the element.
+ * for eample, storage elements are addressed with type = CHET_ST and
+ * unit = 0 .. cp_nslots-1
+ *
+ */
+struct changer_params {
+ int cp_curpicker; /* current transport element */
+ int cp_npickers; /* number of transport elements (CHET_MT) */
+ int cp_nslots; /* number of storage elements (CHET_ST) */
+ int cp_nportals; /* number of import/export elements (CHET_IE) */
+ int cp_ndrives; /* number of data transfer elements (CHET_DT) */
+};
+struct changer_vendor_params {
+ int cvp_n1; /* number of vendor specific elems (CHET_V1) */
+ char cvp_label1[16];
+ int cvp_n2; /* number of vendor specific elems (CHET_V2) */
+ char cvp_label2[16];
+ int cvp_n3; /* number of vendor specific elems (CHET_V3) */
+ char cvp_label3[16];
+ int cvp_n4; /* number of vendor specific elems (CHET_V4) */
+ char cvp_label4[16];
+ int reserved[8];
+};
+
+
+/*
+ * CHIOMOVE
+ * move a medium from one element to another
+ */
+struct changer_move {
+ int cm_fromtype; /* type/unit of source element */
+ int cm_fromunit;
+ int cm_totype; /* type/unit of destination element */
+ int cm_tounit;
+ int cm_flags;
+};
+#define CM_INVERT 1 /* flag: rotate media (for double-sided like MOD) */
+
+
+/*
+ * CHIOEXCHANGE
+ * move one medium from element #1 to element #2,
+ * and another one from element #2 to element #3.
+ * element #1 and #3 are allowed to be identical.
+ */
+struct changer_exchange {
+ int ce_srctype; /* type/unit of element #1 */
+ int ce_srcunit;
+ int ce_fdsttype; /* type/unit of element #2 */
+ int ce_fdstunit;
+ int ce_sdsttype; /* type/unit of element #3 */
+ int ce_sdstunit;
+ int ce_flags;
+};
+#define CE_INVERT1 1
+#define CE_INVERT2 2
+
+
+/*
+ * CHIOPOSITION
+ * move the transport element (robot arm) to a specific element.
+ */
+struct changer_position {
+ int cp_type;
+ int cp_unit;
+ int cp_flags;
+};
+#define CP_INVERT 1
+
+
+/*
+ * CHIOGSTATUS
+ * get element status for all elements of a specific type
+ */
+struct changer_element_status {
+ int ces_type;
+ unsigned char *ces_data;
+};
+#define CESTATUS_FULL 0x01 /* full */
+#define CESTATUS_IMPEXP 0x02 /* media was imported (inserted by sysop) */
+#define CESTATUS_EXCEPT 0x04 /* error condition */
+#define CESTATUS_ACCESS 0x08 /* access allowed */
+#define CESTATUS_EXENAB 0x10 /* element can export media */
+#define CESTATUS_INENAB 0x20 /* element can import media */
+
+
+/*
+ * CHIOGELEM
+ * get more detailed status informtion for a single element
+ */
+struct changer_get_element {
+ int cge_type; /* type/unit */
+ int cge_unit;
+ int cge_status; /* status */
+ int cge_errno; /* errno */
+ int cge_srctype; /* source element of the last move/exchange */
+ int cge_srcunit;
+ int cge_id; /* scsi id (for data transfer elements) */
+ int cge_lun; /* scsi lun (for data transfer elements) */
+ char cge_pvoltag[36]; /* primary volume tag */
+ char cge_avoltag[36]; /* alternate volume tag */
+ int cge_flags;
+};
+/* flags */
+#define CGE_ERRNO 0x01 /* errno available */
+#define CGE_INVERT 0x02 /* media inverted */
+#define CGE_SRC 0x04 /* media src available */
+#define CGE_IDLUN 0x08 /* ID+LUN available */
+#define CGE_PVOLTAG 0x10 /* primary volume tag available */
+#define CGE_AVOLTAG 0x20 /* alternate volume tag available */
+
+
+/*
+ * CHIOSVOLTAG
+ * set volume tag
+ */
+struct changer_set_voltag {
+ int csv_type; /* type/unit */
+ int csv_unit;
+ char csv_voltag[36]; /* volume tag */
+ int csv_flags;
+};
+#define CSV_PVOLTAG 0x01 /* primary volume tag */
+#define CSV_AVOLTAG 0x02 /* alternate volume tag */
+#define CSV_CLEARTAG 0x04 /* clear volume tag */
+
+/* ioctls */
+#define CHIOMOVE _IOW('c', 1,struct changer_move)
+#define CHIOEXCHANGE _IOW('c', 2,struct changer_exchange)
+#define CHIOPOSITION _IOW('c', 3,struct changer_position)
+#define CHIOGPICKER _IOR('c', 4,int) /* not impl. */
+#define CHIOSPICKER _IOW('c', 5,int) /* not impl. */
+#define CHIOGPARAMS _IOR('c', 6,struct changer_params)
+#define CHIOGSTATUS _IOW('c', 8,struct changer_element_status)
+#define CHIOGELEM _IOW('c',16,struct changer_get_element)
+#define CHIOINITELEM _IO('c',17)
+#define CHIOSVOLTAG _IOW('c',18,struct changer_set_voltag)
+#define CHIOGVPARAMS _IOR('c',19,struct changer_vendor_params)
+
+/* ---------------------------------------------------------------------- */
+
+/*
+ * Local variables:
+ * c-basic-offset: 8
+ * End:
+ */
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