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1 | /* |
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 | ||
95 | struct 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 */ |