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 __PKTCDVD_H
 14#define __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
 86struct 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 /* __PKTCDVD_H */