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113 lines
2.6 KiB
C
113 lines
2.6 KiB
C
4 years ago
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/* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
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/*
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* Copyright (C) 2000 Jens Axboe <axboe@suse.de>
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* Copyright (C) 2001-2004 Peter Osterlund <petero2@telia.com>
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*
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* May be copied or modified under the terms of the GNU General Public
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* License. See linux/COPYING for more information.
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*
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* Packet writing layer for ATAPI and SCSI CD-R, CD-RW, DVD-R, and
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* DVD-RW devices.
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*
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*/
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#ifndef __PKTCDVD_H
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#define __PKTCDVD_H
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#include <linux/types.h>
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/*
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* 1 for normal debug messages, 2 is very verbose. 0 to turn it off.
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*/
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#define PACKET_DEBUG 1
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#define MAX_WRITERS 8
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#define PKT_RB_POOL_SIZE 512
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/*
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* How long we should hold a non-full packet before starting data gathering.
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*/
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#define PACKET_WAIT_TIME (HZ * 5 / 1000)
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/*
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* use drive write caching -- we need deferred error handling to be
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* able to successfully recover with this option (drive will return good
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* status as soon as the cdb is validated).
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*/
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#if defined(CONFIG_CDROM_PKTCDVD_WCACHE)
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#define USE_WCACHING 1
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#else
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#define USE_WCACHING 0
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#endif
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/*
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* No user-servicable parts beyond this point ->
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*/
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/*
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* device types
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*/
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#define PACKET_CDR 1
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#define PACKET_CDRW 2
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#define PACKET_DVDR 3
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#define PACKET_DVDRW 4
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/*
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* flags
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*/
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#define PACKET_WRITABLE 1 /* pd is writable */
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#define PACKET_NWA_VALID 2 /* next writable address valid */
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#define PACKET_LRA_VALID 3 /* last recorded address valid */
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#define PACKET_MERGE_SEGS 4 /* perform segment merging to keep */
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/* underlying cdrom device happy */
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/*
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* Disc status -- from READ_DISC_INFO
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*/
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#define PACKET_DISC_EMPTY 0
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#define PACKET_DISC_INCOMPLETE 1
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#define PACKET_DISC_COMPLETE 2
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#define PACKET_DISC_OTHER 3
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/*
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* write type, and corresponding data block type
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*/
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#define PACKET_MODE1 1
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#define PACKET_MODE2 2
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#define PACKET_BLOCK_MODE1 8
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#define PACKET_BLOCK_MODE2 10
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/*
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* Last session/border status
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*/
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#define PACKET_SESSION_EMPTY 0
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#define PACKET_SESSION_INCOMPLETE 1
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#define PACKET_SESSION_RESERVED 2
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#define PACKET_SESSION_COMPLETE 3
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#define PACKET_MCN "4a656e734178626f65323030300000"
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#undef PACKET_USE_LS
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#define PKT_CTRL_CMD_SETUP 0
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#define PKT_CTRL_CMD_TEARDOWN 1
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#define PKT_CTRL_CMD_STATUS 2
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struct pkt_ctrl_command {
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__u32 command; /* in: Setup, teardown, status */
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__u32 dev_index; /* in/out: Device index */
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__u32 dev; /* in/out: Device nr for cdrw device */
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__u32 pkt_dev; /* in/out: Device nr for packet device */
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__u32 num_devices; /* out: Largest device index + 1 */
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__u32 padding; /* Not used */
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};
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/*
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* packet ioctls
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*/
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#define PACKET_IOCTL_MAGIC ('X')
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#define PACKET_CTRL_CMD _IOWR(PACKET_IOCTL_MAGIC, 1, struct pkt_ctrl_command)
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#endif /* __PKTCDVD_H */
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