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chio.h
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chio.h
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/* $NetBSD: chio.h,v 1.9 1997/09/29 17:32:26 mjacob 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) */
/*
* 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 */
};
/*
* Command used to get element status.
*/
struct changer_element_status {
int ces_type; /* element type */
u_int8_t *ces_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"
#define CHIOMOVE _IOW('c', 0x01, struct changer_move)
#define CHIOEXCHANGE _IOW('c', 0x02, struct changer_exchange)
#define CHIOPOSITION _IOW('c', 0x03, struct changer_position)
#define CHIOGPICKER _IOR('c', 0x04, int)
#define CHIOSPICKER _IOW('c', 0x05, int)
#define CHIOGPARAMS _IOR('c', 0x06, struct changer_params)
#define CHIOIELEM _IO('c', 0x07)
#define CHIOGSTATUS _IOW('c', 0x08, struct changer_element_status)
#endif /* _SYS_CHIO_H_ */