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

     /*      $NetBSD: mtio.h,v 1.24 2015/09/06 06:01:02 dholland Exp $       */
     
     /*
      * 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. 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
     */
    
    #ifndef _SYS_MTIO_H_
    #define _SYS_MTIO_H_
    
    #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 */
            int32_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 MTRETEN         8       /* retension */
    #define MTERASE         9       /* erase entire tape */
    #define MTEOM           10      /* forward to end of media */
    #define MTNBSF          11      /* backward space to beginning of file */
    #define MTCACHE         12      /* enable controller cache */
    #define MTNOCACHE       13      /* disable controller cache */
    #define MTSETBSIZ       14      /* set block size; 0 for variable */
    #define MTSETDNSTY      15      /* set density code for current mode */
    #define MTCMPRESS       16      /* set/clear device compression */
    #define MTEWARN         17      /* set/clear early warning behaviour */
    
    /* 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 by most tape drivers */
            int32_t mt_fileno;      /* file number of current position */
            int32_t mt_blkno;       /* block number of current position */
    /* end not yet implemented */
            int32_t mt_blksiz;      /* current block size */
            int32_t mt_density;     /* current density code */
            int32_t mt_mblksiz[4];  /* block size for different modes */
            int32_t mt_mdensity[4]; /* density codes for different modes */
    };
    
    /*
     * 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 - Also "GENERIC SCSI" */
    #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_ISWANGTEK    0x11            /* WANGTEK 5150ES */
   #define MT_ISCALIPER    0x12            /* Caliper CP150 */
   #define MT_ISWTEK5099   0x13            /* WANGTEK 5099ES */
   #define MT_ISVIPER2525  0x14            /* Archive Viper 2525 */
   #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 */
   
   /* bits defined for the mt_dsreg field */
   #define MT_DS_RDONLY    0x10            /* tape mounted readonly */
   #define MT_DS_MOUNTED   0x03            /* tape mounted (for control opens) */
   
   /*
    * For the mt_erreg field.....This is supposed to be a *generic*
    * MT interface, so we cannot overload it with SCSI specific entities,
    * (like ASC/ASCQ) nor is there enough room to put all the information
    * in that is desirable. This whole structure should be redone.
    *
    * In the interim, this will be considered device-specific. For SCSI,
    * this will be taken to mean the last Sense Key seen. It is not
    * guaranteed to always be sensibly associated with any command.
    */
   
   /*
    * The action of a MTIOCGET command clears mt_dsreg, mt_erreg, and mt_resid
    */
   
   /* 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 */
   /*
    * When more SCSI-3 SSC (streaming device) devices are out there
    * that support the full 32 byte type 2 structure, we'll have to
    * rethink these ioctls to support all the entities they haul into
    * the picture (64 bit blocks, logical file record numbers, etc..).
    */
   #define MTIOCRDSPOS     _IOR('m', 5, uint32_t)  /* get logical blk addr */
   #define MTIOCRDHPOS     _IOR('m', 6, uint32_t)  /* get hardware blk addr */
   #define MTIOCSLOCATE    _IOW('m', 5, uint32_t)  /* seek to logical blk addr */
   #define MTIOCHLOCATE    _IOW('m', 6, uint32_t)  /* seek to hardware blk addr */
   
   #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 /* _KERNEL */
   
   #endif /* !_SYS_MTIO_H_ */

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