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
86 struct 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
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