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
  95 struct 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 */