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

   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
  95struct 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 */
 112