FreeBSD/Linux Kernel Cross Reference
sys/sys/mtio.h

     /*
      * Copyright (c) 1982, 1986, 1993
      *      The Regents of the University of California.  All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
      *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *      This product includes software developed by the University of
     *      California, Berkeley and its contributors.
     * 4. Neither the name of the University nor the names of its contributors
     *    may be used to endorse or promote products derived from this software
     *    without specific prior written permission.
     *
     * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     *
     *      @(#)mtio.h      8.1 (Berkeley) 6/2/93
     * $FreeBSD: src/sys/sys/mtio.h,v 1.8.2.1 1999/09/05 08:22:40 peter Exp $
     */
    
    #ifndef _SYS_MTIO_H_
    #define _SYS_MTIO_H_
    
    #ifndef KERNEL
    #include <sys/types.h>
    #endif
    #include <sys/ioccom.h>
    
    /*
     * 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 */
    
    #if defined(__FreeBSD__)
    /* Set block size for device. If device is a variable size dev          */
    /* a non zero parameter will change the device to a fixed block size    */
    /* device with block size set to that of the parameter passed in.       */
    /* Resetting the block size to 0 will restore the device to a variable  */
    /* block size device. */
    
    #define MTSETBSIZ       10
    
    /* Set density values for device. They are defined in the SCSI II spec  */
    /* and range from 0 to 0x17. Sets the value for the opened mode only    */
    
    #define MTSETDNSTY      11
    
    #define MTERASE         12      /* erase to EOM */
    #define MTEOD           13      /* Space to EOM */
    #define MTCOMP          14      /* select compression mode 0=off, 1=def */
    #define MTRETENS        15      /* re-tension tape */
    
    #endif
    
    /* 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 */
    #if defined (__FreeBSD__)
            daddr_t mt_blksiz;      /* presently operating blocksize */
            daddr_t mt_density;     /* presently operating density */
           daddr_t mt_comp;        /* presently operating compression */
           daddr_t mt_blksiz0;     /* blocksize for mode 0 */
           daddr_t mt_blksiz1;     /* blocksize for mode 1 */
           daddr_t mt_blksiz2;     /* blocksize for mode 2 */
           daddr_t mt_blksiz3;     /* blocksize for mode 3 */
           daddr_t mt_density0;    /* density for mode 0 */
           daddr_t mt_density1;    /* density for mode 1 */
           daddr_t mt_density2;    /* density for mode 2 */
           daddr_t mt_density3;    /* density for mode 3 */
   /* the following are not yet implemented */
           u_char  mt_comp0;       /* compression type for mode 0 */
           u_char  mt_comp1;       /* compression type for mode 1 */
           u_char  mt_comp2;       /* compression type for mode 2 */
           u_char  mt_comp3;       /* compression type for mode 3 */
   #endif
           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 */
   #define MT_ISCT         0x0a            /* HP 1/4 tape */
   #define MT_ISFHP        0x0b            /* HP 7980 1/2 tape */
   #define MT_ISEXABYTE    0x0c            /* Exabyte */
   #define MT_ISEXA8200    0x0c            /* Exabyte EXB-8200 */
   #define MT_ISEXA8500    0x0d            /* Exabyte EXB-8500 */
   #define MT_ISVIPER1     0x0e            /* Archive Viper-150 */
   #define MT_ISPYTHON     0x0f            /* Archive Python (DAT) */
   #define MT_ISHPDAT      0x10            /* HP 35450A DAT drive */
   #define MT_ISMFOUR      0x11            /* M4 Data 1/2 9track drive */
   #define MT_ISTK50       0x12            /* DEC SCSI TK50 */
   #define MT_ISMT02       0x13            /* Emulex MT02 SCSI tape controller */
   
   /* 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/nrst0"
   #endif
   
   #ifdef  KERNEL
   /*
    * minor device number
    */
   
   #define T_UNIT          003             /* unit selection */
   #define T_NOREWIND      004             /* no rewind on close */
   #define T_DENSEL        030             /* density select */
   #define T_800BPI        000             /* select  800 bpi */
   #define T_1600BPI       010             /* select 1600 bpi */
   #define T_6250BPI       020             /* select 6250 bpi */
   #define T_BADBPI        030             /* undefined selection */
   #endif
   
   #endif /* !_SYS_MTIO_H_ */

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