blob: 2640b9d4e2430a43c98237511effe70f1d08eb95 [file] [log] [blame]
David Howells607ca462012-10-13 10:46:48 +01001/*
2 * Copyright (C) 2000 Jens Axboe <axboe@suse.de>
3 * Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
4 *
5 * May be copied or modified under the terms of the GNU General Public
6 * License. See linux/COPYING for more information.
7 *
8 * Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
9 * DVD-RW devices.
10 *
11 */
12#ifndef _UAPI__PKTCDVD_H
13#define _UAPI__PKTCDVD_H
14
15#include <linux/types.h>
16
17/*
18 * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
19 */
20#define PACKET_DEBUG 1
21
22#define MAX_WRITERS 8
23
24#define PKT_RB_POOL_SIZE 512
25
26/*
27 * How long we should hold a non-full packet before starting data gathering.
28 */
29#define PACKET_WAIT_TIME (HZ * 5 / 1000)
30
31/*
32 * use drive write caching -- we need deferred error handling to be
33 * able to successfully recover with this option (drive will return good
34 * status as soon as the cdb is validated).
35 */
36#if defined(CONFIG_CDROM_PKTCDVD_WCACHE)
37#define USE_WCACHING 1
38#else
39#define USE_WCACHING 0
40#endif
41
42/*
43 * No user-servicable parts beyond this point ->
44 */
45
46/*
47 * device types
48 */
49#define PACKET_CDR 1
50#define PACKET_CDRW 2
51#define PACKET_DVDR 3
52#define PACKET_DVDRW 4
53
54/*
55 * flags
56 */
57#define PACKET_WRITABLE 1 /* pd is writable */
58#define PACKET_NWA_VALID 2 /* next writable address valid */
59#define PACKET_LRA_VALID 3 /* last recorded address valid */
60#define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */
61 /* underlying cdrom device happy */
62
63/*
64 * Disc status -- from READ_DISC_INFO
65 */
66#define PACKET_DISC_EMPTY 0
67#define PACKET_DISC_INCOMPLETE 1
68#define PACKET_DISC_COMPLETE 2
69#define PACKET_DISC_OTHER 3
70
71/*
72 * write type, and corresponding data block type
73 */
74#define PACKET_MODE1 1
75#define PACKET_MODE2 2
76#define PACKET_BLOCK_MODE1 8
77#define PACKET_BLOCK_MODE2 10
78
79/*
80 * Last session/border status
81 */
82#define PACKET_SESSION_EMPTY 0
83#define PACKET_SESSION_INCOMPLETE 1
84#define PACKET_SESSION_RESERVED 2
85#define PACKET_SESSION_COMPLETE 3
86
87#define PACKET_MCN "4a656e734178626f65323030300000"
88
89#undef PACKET_USE_LS
90
91#define PKT_CTRL_CMD_SETUP 0
92#define PKT_CTRL_CMD_TEARDOWN 1
93#define PKT_CTRL_CMD_STATUS 2
94
95struct pkt_ctrl_command {
96 __u32 command; /* in: Setup, teardown, status */
97 __u32 dev_index; /* in/out: Device index */
98 __u32 dev; /* in/out: Device nr for cdrw device */
99 __u32 pkt_dev; /* in/out: Device nr for packet device */
100 __u32 num_devices; /* out: Largest device index + 1 */
101 __u32 padding; /* Not used */
102};
103
104/*
105 * packet ioctls
106 */
107#define PACKET_IOCTL_MAGIC ('X')
108#define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
109
110
111#endif /* _UAPI__PKTCDVD_H */