1/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
2/*
3 * Copyright (C) 2000 Jens Axboe <axboe@suse.de>
4 * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
5 *
6 * May be copied or modified under the terms of the GNU General Public
7 * License.  See linux/COPYING for more information.
8 *
9 * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
10 * DVD-RW devices.
11 *
12 */
13#ifndef _UAPI__PKTCDVD_H
14#define _UAPI__PKTCDVD_H
15
16#include <linux/types.h>
17
18/*
19 * UNUSED:
20 * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
21 */
22#define PACKET_DEBUG		1
23
24#define	MAX_WRITERS		8
25
26#define PKT_RB_POOL_SIZE	512
27
28/*
29 * How long we should hold a non-full packet before starting data gathering.
30 */
31#define PACKET_WAIT_TIME	(HZ * 5 / 1000)
32
33/*
34 * No user-servicable parts beyond this point ->
35 */
36
37/*
38 * device types
39 */
40#define PACKET_CDR		1
41#define	PACKET_CDRW		2
42#define PACKET_DVDR		3
43#define PACKET_DVDRW		4
44
45/*
46 * flags
47 */
48#define PACKET_WRITABLE		1	/* pd is writable */
49#define PACKET_NWA_VALID	2	/* next writable address valid */
50#define PACKET_LRA_VALID	3	/* last recorded address valid */
51#define PACKET_MERGE_SEGS	4	/* perform segment merging to keep */
52					/* underlying cdrom device happy */
53
54/*
55 * Disc status -- from READ_DISC_INFO
56 */
57#define PACKET_DISC_EMPTY	0
58#define PACKET_DISC_INCOMPLETE	1
59#define PACKET_DISC_COMPLETE	2
60#define PACKET_DISC_OTHER	3
61
62/*
63 * write type, and corresponding data block type
64 */
65#define PACKET_MODE1		1
66#define PACKET_MODE2		2
67#define PACKET_BLOCK_MODE1	8
68#define PACKET_BLOCK_MODE2	10
69
70/*
71 * Last session/border status
72 */
73#define PACKET_SESSION_EMPTY		0
74#define PACKET_SESSION_INCOMPLETE	1
75#define PACKET_SESSION_RESERVED		2
76#define PACKET_SESSION_COMPLETE		3
77
78#define PACKET_MCN			"4a656e734178626f65323030300000"
79
80#undef PACKET_USE_LS
81
82#define PKT_CTRL_CMD_SETUP	0
83#define PKT_CTRL_CMD_TEARDOWN	1
84#define PKT_CTRL_CMD_STATUS	2
85
86struct pkt_ctrl_command {
87	__u32 command;				/* in: Setup, teardown, status */
88	__u32 dev_index;			/* in/out: Device index */
89	__u32 dev;				/* in/out: Device nr for cdrw device */
90	__u32 pkt_dev;				/* in/out: Device nr for packet device */
91	__u32 num_devices;			/* out: Largest device index + 1 */
92	__u32 padding;				/* Not used */
93};
94
95/*
96 * packet ioctls
97 */
98#define PACKET_IOCTL_MAGIC	('X')
99#define PACKET_CTRL_CMD		_IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
100
101
102#endif /* _UAPI__PKTCDVD_H */
103