LXR linux/include/uapi/linux/pktcdvd.h

   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
  96struct 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