aboutsummaryrefslogtreecommitdiff
path: root/sys/sys/chio.h
blob: 4affe23cb26dd1bbd4ada2b1ab2ce377600b9dca (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
/*
 * 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.
 *
 *	$Id: chio.h,v 1.9 1997/02/22 09:44:56 peter Exp $
 */

#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 CHIOGSTATUS	_IOW('c', 0x08, struct changer_element_status)

#endif /* _SYS_CHIO_H_ */