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
  96 struct 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 */