NetBSD/sys/scsi/scsi_tape.h

150 lines
2.7 KiB
C

/*
* SCSI tape interface description
*
* Written by Julian Elischer (julian@tfs.com)
* for TRW Financial Systems.
*
* TRW Financial Systems, in accordance with their agreement with Carnegie
* Mellon University, makes this software available to CMU to distribute
* or use in any manner that they see fit as long as this message is kept with
* the software. For this reason TFS also grants any other persons or
* organisations permission to use or modify this software.
*
* TFS supplies this software to be publicly redistributed
* on the understanding that TFS is not responsible for the correct
* functioning of this software in any circumstances.
*
* $Id: scsi_tape.h,v 1.2 1993/05/20 03:46:34 cgd Exp $
*/
/*
* Ported to run under 386BSD by Julian Elischer (julian@tfs.com) Sept 1992
*/
/*
* SCSI command format
*/
struct scsi_rw_tape
{
u_char op_code;
u_char fixed:1;
u_char :4;
u_char lun:3;
u_char len[3];
u_char link:1;
u_char flag:1;
u_char :6;
} rw_tape;
struct scsi_space
{
u_char op_code;
u_char code:2;
u_char :3;
u_char lun:3;
u_char number[3];
u_char link:1;
u_char flag:1;
u_char :6;
} space;
#define SP_BLKS 0
#define SP_FILEMARKS 1
#define SP_SEQ_FILEMARKS 2
#define SP_EOM 3
struct scsi_write_filemarks
{
u_char op_code;
u_char :5;
u_char lun:3;
u_char number[3];
u_char link:1;
u_char flag:1;
u_char :6;
} write_filemarks;
struct scsi_rewind
{
u_char op_code;
u_char immed:1;
u_char :4;
u_char lun:3;
u_char unused[3];
u_char link:1;
u_char flag:1;
u_char :6;
} rewind;
struct scsi_load
{
u_char op_code;
u_char immed:1;
u_char :4;
u_char lun:3;
u_char unused[2];
u_char load:1;
u_char reten:1;
u_char :6;
u_char link:1;
u_char flag:1;
u_char :6;
} load;
#define LD_UNLOAD 0
#define LD_LOAD 1
struct scsi_blk_limits
{
u_char op_code;
u_char :5;
u_char lun:3;
u_char unused[3];
u_char link:1;
u_char flag:1;
u_char :6;
} blk_limits;
/*
* Opcodes
*/
#define REWIND 0x01
#define READ_BLK_LIMITS 0x05
#define READ_COMMAND_TAPE 0x08
#define WRITE_COMMAND_TAPE 0x0a
#define WRITE_FILEMARKS 0x10
#define SPACE 0x11
#define LOAD_UNLOAD 0x1b /* same as above */
struct scsi_blk_limits_data
{
u_char reserved;
u_char max_length_2; /* Most significant */
u_char max_length_1;
u_char max_length_0; /* Least significant */
u_char min_length_1; /* Most significant */
u_char min_length_0; /* Least significant */
};
struct scsi_mode_header_tape
{
u_char data_length; /* Sense data length */
u_char medium_type;
u_char speed:4;
u_char buf_mode:3;
u_char write_protected:1;
u_char blk_desc_len;
};
#define QIC_120 0x0f
#define QIC_150 0x10
#define QIC_320 0x11
#define QIC_525 0x11
#define QIC_1320 0x12