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