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  * 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
20  */
21 #define PACKET_DEBUG		1
22 
23 #define	MAX_WRITERS		8
24 
25 #define PKT_RB_POOL_SIZE	512
26 
27 /*
28  * How long we should hold a non-full packet before starting data gathering.
29  */
30 #define PACKET_WAIT_TIME	(HZ * 5 / 1000)
31 
32 /*
33  * use drive write caching -- we need deferred error handling to be
34  * able to successfully recover with this option (drive will return good
35  * status as soon as the cdb is validated).
36  */
37 #if defined(CONFIG_CDROM_PKTCDVD_WCACHE)
38 #define USE_WCACHING		1
39 #else
40 #define USE_WCACHING		0
41 #endif
42 
43 /*
44  * No user-servicable parts beyond this point ->
45  */
46 
47 /*
48  * device types
49  */
50 #define PACKET_CDR		1
51 #define	PACKET_CDRW		2
52 #define PACKET_DVDR		3
53 #define PACKET_DVDRW		4
54 
55 /*
56  * flags
57  */
58 #define PACKET_WRITABLE		1	/* pd is writable */
59 #define PACKET_NWA_VALID	2	/* next writable address valid */
60 #define PACKET_LRA_VALID	3	/* last recorded address valid */
61 #define PACKET_MERGE_SEGS	4	/* perform segment merging to keep */
62 					/* underlying cdrom device happy */
63 
64 /*
65  * Disc status -- from READ_DISC_INFO
66  */
67 #define PACKET_DISC_EMPTY	0
68 #define PACKET_DISC_INCOMPLETE	1
69 #define PACKET_DISC_COMPLETE	2
70 #define PACKET_DISC_OTHER	3
71 
72 /*
73  * write type, and corresponding data block type
74  */
75 #define PACKET_MODE1		1
76 #define PACKET_MODE2		2
77 #define PACKET_BLOCK_MODE1	8
78 #define PACKET_BLOCK_MODE2	10
79 
80 /*
81  * Last session/border status
82  */
83 #define PACKET_SESSION_EMPTY		0
84 #define PACKET_SESSION_INCOMPLETE	1
85 #define PACKET_SESSION_RESERVED		2
86 #define PACKET_SESSION_COMPLETE		3
87 
88 #define PACKET_MCN			"4a656e734178626f65323030300000"
89 
90 #undef PACKET_USE_LS
91 
92 #define PKT_CTRL_CMD_SETUP	0
93 #define PKT_CTRL_CMD_TEARDOWN	1
94 #define PKT_CTRL_CMD_STATUS	2
95 
96 struct pkt_ctrl_command {
97 	__u32 command;				/* in: Setup, teardown, status */
98 	__u32 dev_index;			/* in/out: Device index */
99 	__u32 dev;				/* in/out: Device nr for cdrw device */
100 	__u32 pkt_dev;				/* in/out: Device nr for packet device */
101 	__u32 num_devices;			/* out: Largest device index + 1 */
102 	__u32 padding;				/* Not used */
103 };
104 
105 /*
106  * packet ioctls
107  */
108 #define PACKET_IOCTL_MAGIC	('X')
109 #define PACKET_CTRL_CMD		_IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
110 
111 
112 #endif /* _UAPI__PKTCDVD_H */
113