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+/* $OpenBSD: chio.h,v 1.7 2006/05/31 03:01:44 beck Exp $ */
+/* $NetBSD: chio.h,v 1.8 1996/04/03 00:25:21 thorpej Exp $ */
+
+/*
+ * Copyright (c) 1996 Jason R. Thorpe <thorpej@and.com>
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in the
+ * documentation and/or other materials provided with the distribution.
+ * 3. All advertising materials mentioning features or use of this software
+ * must display the following acknowledgements:
+ * This product includes software developed by Jason R. Thorpe
+ * for And Communications, http://www.and.com/
+ * 4. The name of the author may not be used to endorse or promote products
+ * derived from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
+ * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
+ * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
+ * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+ * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
+ * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+#ifndef _SYS_CHIO_H_
+#define _SYS_CHIO_H_
+
+/*
+ * Element types. Used as "to" and "from" type indicators in move
+ * and exchange operations.
+ *
+ * Note that code in sys/scsi/ch.c relies on these values (uses them
+ * as offsets in an array, and other evil), so don't muck with them
+ * unless you know what you're doing.
+ */
+#define CHET_MT 0 /* medium transport (picker) */
+#define CHET_ST 1 /* storage transport (slot) */
+#define CHET_IE 2 /* import/export (portal) */
+#define CHET_DT 3 /* data transfer (drive) */
+
+/*
+ * Maximum length of a volume identification string
+ */
+#define CH_VOLTAG_MAXLEN 32
+
+/*
+ * Structure used to execute a MOVE MEDIUM command.
+ */
+struct changer_move {
+ int cm_fromtype; /* element type to move from */
+ int cm_fromunit; /* logical unit of from element */
+ int cm_totype; /* element type to move to */
+ int cm_tounit; /* logical unit of to element */
+ int cm_flags; /* misc. flags */
+};
+
+/* cm_flags */
+#define CM_INVERT 0x01 /* invert media */
+
+/*
+ * Structure used to execute an EXCHANGE MEDIUM command. In an
+ * exchange operation, the following steps occur:
+ *
+ * - media from source is moved to first destination.
+ *
+ * - media previously occupying first destination is moved
+ * to the second destination.
+ *
+ * The second destination may or may not be the same as the source.
+ * In the case of a simple exchange, the source and second destination
+ * are the same.
+ */
+struct changer_exchange {
+ int ce_srctype; /* element type of source */
+ int ce_srcunit; /* logical unit of source */
+ int ce_fdsttype; /* element type of first destination */
+ int ce_fdstunit; /* logical unit of first destination */
+ int ce_sdsttype; /* element type of second destination */
+ int ce_sdstunit; /* logical unit of second destination */
+ int ce_flags; /* misc. flags */
+};
+
+/* ce_flags */
+#define CE_INVERT1 0x01 /* invert media 1 */
+#define CE_INVERT2 0x02 /* invert media 2 */
+
+/*
+ * Structure used to execute a POSITION TO ELEMENT command. This
+ * moves the current picker in front of the specified element.
+ */
+struct changer_position {
+ int cp_type; /* element type */
+ int cp_unit; /* logical unit of element */
+ int cp_flags; /* misc. flags */
+};
+
+/* cp_flags */
+#define CP_INVERT 0x01 /* invert picker */
+
+/*
+ * Data returned by CHIOGPARAMS.
+ */
+struct changer_params {
+ int cp_curpicker; /* current picker */
+ int cp_npickers; /* number of pickers */
+ int cp_nslots; /* number of slots */
+ int cp_nportals; /* number of import/export portals */
+ int cp_ndrives; /* number of drives */
+};
+
+struct changer_voltag {
+ u_char cv_volid[CH_VOLTAG_MAXLEN + 1];
+ u_int16_t cv_serial;
+};
+
+struct changer_element_status {
+ int ces_type; /* element type */
+ u_int8_t ces_flags; /* flags */
+ struct changer_voltag ces_pvoltag; /* primary voltag */
+ struct changer_voltag ces_avoltag; /* alternate voltag */
+};
+
+/*
+ * Command used to get element status.
+ */
+struct changer_element_status_request {
+ int cesr_type; /* element type */
+ int cesr_flags;
+#define CESR_VOLTAGS 0x01
+
+ struct changer_element_status *cesr_data; /* pre-allocated data storage */
+};
+
+/*
+ * Data returned by CHIOGSTATUS is an array of flags bytes.
+ * Not all flags have meaning for all element types.
+ */
+#define CESTATUS_FULL 0x01 /* element is full */
+#define CESTATUS_IMPEXP 0x02 /* media deposited by operator */
+#define CESTATUS_EXCEPT 0x04 /* element in abnormal state */
+#define CESTATUS_ACCESS 0x08 /* media accessible by picker */
+#define CESTATUS_EXENAB 0x10 /* element supports exporting */
+#define CESTATUS_INENAB 0x20 /* element supports importing */
+
+#define CESTATUS_PICKER_MASK 0x05 /* flags valid for pickers */
+#define CESTATUS_SLOT_MASK 0x0c /* flags valid for slots */
+#define CESTATUS_PORTAL_MASK 0x3f /* flags valid for portals */
+#define CESTATUS_DRIVE_MASK 0x0c /* flags valid for drives */
+
+#define CESTATUS_BITS \
+ "\20\6INEAB\5EXENAB\4ACCESS\3EXCEPT\2IMPEXP\1FULL"
+
+/*
+ * XXX we have to renumber this since it chashes w/ the
+ * cdio ioctls, O* interface goes away right after 3.3
+ */
+#define CHIOMOVE _IOW('c', 0x41, struct changer_move)
+#define CHIOEXCHANGE _IOW('c', 0x42, struct changer_exchange)
+#define CHIOPOSITION _IOW('c', 0x43, struct changer_position)
+#define CHIOGPICKER _IOR('c', 0x44, int)
+#define CHIOSPICKER _IOW('c', 0x45, int)
+#define CHIOGPARAMS _IOR('c', 0x46, struct changer_params)
+#define CHIOGSTATUS _IOW('c', 0x48, struct changer_element_status_request)
+
+#endif /* _SYS_CHIO_H_ */