Home | History | Annotate | Download | only in linux 
      1 /* SPDX-License-Identifier: GPL-2.0 WITH Linux-syscall-note */
      2 /*
      3  * Copyright (C) 2000 Jens Axboe <axboe (at) suse.de>
      4  * Copyright (C) 2001-2004 Peter Osterlund <petero2 (at) 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 */
    113