usr/src/sys/sys/mtio.h

/*
 * Copyright (c) 1982, 1986 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms are permitted
 * provided that the above copyright notice and this paragraph are
 * duplicated in all such forms and that any documentation,
 * advertising materials, and other materials related to such
 * distribution and use acknowledge that the software was developed
 * by the University of California, Berkeley.  The name of the
 * University may not be used to endorse or promote products derived
 * from this software without specific prior written permission.
 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
 * WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)mtio.h      7.4 (Berkeley) %G%
 */

/*
 * Structures and definitions for mag tape io control commands
 */

/* structure for MTIOCTOP - mag tape op command */
struct mtop {
        short   mt_op;          /* operations defined below */
        daddr_t mt_count;       /* how many of them */
};

/* operations */
#define MTWEOF          0       /* write an end-of-file record */
#define MTFSF           1       /* forward space file */
#define MTBSF           2       /* backward space file */
#define MTFSR           3       /* forward space record */
#define MTBSR           4       /* backward space record */
#define MTREW           5       /* rewind */
#define MTOFFL          6       /* rewind and put the drive offline */
#define MTNOP           7       /* no operation, sets status only */
#define MTCACHE         8       /* enable controller cache */
#define MTNOCACHE       9       /* disable controller cache */

/* structure for MTIOCGET - mag tape get status command */

struct mtget {
        short   mt_type;        /* type of magtape device */
/* the following two registers are grossly device dependent */
        short   mt_dsreg;       /* ``drive status'' register */
        short   mt_erreg;       /* ``error'' register */
/* end device-dependent registers */
        short   mt_resid;       /* residual count */
/* the following two are not yet implemented */
        daddr_t mt_fileno;      /* file number of current position */
        daddr_t mt_blkno;       /* block number of current position */
/* end not yet implemented */
};

/*
 * Constants for mt_type byte.  These are the same
 * for controllers compatible with the types listed.
 */
#define MT_ISTS         0x01            /* TS-11 */
#define MT_ISHT         0x02            /* TM03 Massbus: TE16, TU45, TU77 */
#define MT_ISTM         0x03            /* TM11/TE10 Unibus */
#define MT_ISMT         0x04            /* TM78/TU78 Massbus */
#define MT_ISUT         0x05            /* SI TU-45 emulation on Unibus */
#define MT_ISCPC        0x06            /* SUN */
#define MT_ISAR         0x07            /* SUN */
#define MT_ISTMSCP      0x08            /* DEC TMSCP protocol (TU81, TK50) */
#define MT_ISCY         0x09            /* CCI Cipher */

/* mag tape io control commands */
#define MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
#define MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */
#define MTIOCIEOT       _IO('m', 3)                     /* ignore EOT error */
#define MTIOCEEOT       _IO('m', 4)                     /* enable EOT error */

#ifndef KERNEL
#define DEFTAPE "/dev/rmt12"
#endif