| David Howells | 607ca46 | 2012-10-13 10:46:48 +0100 | [diff] [blame] | 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 */ |