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: releng/5.2/sys/sys/mtio.h 96564 2002-05-14 07:30:13Z phk $
     */
    
    #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 */
            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 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. 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 */
    #define MTWSS           16      /* write setmark(s) */
    #define MTFSS           17      /* forward space setmark */
    #define MTBSS           18      /* backward space setmark */
    
    #define MT_COMP_ENABLE          0xffffffff
    #define MT_COMP_DISABLED        0xfffffffe
    #define MT_COMP_UNSUPP          0xfffffffd
    
    /*
     * Values in mt_dsreg that say what the device is doing
     */
    #define MTIO_DSREG_NIL  0       /* Unknown */
    #define MTIO_DSREG_REST 1       /* Doing Nothing */
    #define MTIO_DSREG_RBSY 2       /* Communicating with tape (but no motion) */
    #define MTIO_DSREG_WR   20      /* Writing */
    #define MTIO_DSREG_FMK  21      /* Writing Filemarks */
   #define MTIO_DSREG_ZER  22      /* Erasing */
   #define MTIO_DSREG_RD   30      /* Reading */
   #define MTIO_DSREG_FWD  40      /* Spacing Forward */
   #define MTIO_DSREG_REV  41      /* Spacing Reverse */
   #define MTIO_DSREG_POS  42      /* Hardware Positioning (direction unknown) */
   #define MTIO_DSREG_REW  43      /* Rewinding */
   #define MTIO_DSREG_TEN  44      /* Retensioning */
   #define MTIO_DSREG_UNL  45      /* Unloading */
   #define MTIO_DSREG_LD   46      /* Loading */
   
   #endif  /* __FreeBSD__ */
   
   /* 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 */
           /*
            * Note that the residual count, while maintained, may be
            * be nonsense because the size of the residual may (greatly)
            * exceed 32 K-bytes. Use the MTIOCERRSTAT ioctl to get a
            * more accurate count.
            */
           short   mt_resid;       /* residual count */
   #if defined (__FreeBSD__)
           int32_t mt_blksiz;      /* presently operating blocksize */
           int32_t mt_density;     /* presently operating density */
           u_int32_t mt_comp;      /* presently operating compression */
           int32_t mt_blksiz0;     /* blocksize for mode 0 */
           int32_t mt_blksiz1;     /* blocksize for mode 1 */
           int32_t mt_blksiz2;     /* blocksize for mode 2 */
           int32_t mt_blksiz3;     /* blocksize for mode 3 */
           int32_t mt_density0;    /* density for mode 0 */
           int32_t mt_density1;    /* density for mode 1 */
           int32_t mt_density2;    /* density for mode 2 */
           int32_t mt_density3;    /* density for mode 3 */
   /* the following are not yet implemented */
           u_int32_t mt_comp0;     /* compression type for mode 0 */
           u_int32_t mt_comp1;     /* compression type for mode 1 */
           u_int32_t mt_comp2;     /* compression type for mode 2 */
           u_int32_t mt_comp3;     /* compression type for mode 3 */
   /* end not yet implemented */
   #endif
           int32_t mt_fileno;      /* relative file number of current position */
           int32_t mt_blkno;       /* relative block number of current position */
   };
   
   /* structure for MTIOCERRSTAT - tape get error status command */
   /* really only supported for SCSI tapes right now */
   struct scsi_tape_errors {
           /*
            * These are latched from the last command that had a SCSI
            * Check Condition noted for these operations. The act
            * of issuing an MTIOCERRSTAT unlatches and clears them.
            */
           u_int8_t io_sense[32];  /* Last Sense Data For Data I/O */
           int32_t io_resid;       /* residual count from last Data I/O */
           u_int8_t io_cdb[16];    /* Command that Caused the Last Data Sense */
           u_int8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
           int32_t ctl_resid;      /* residual count from last Control I/O */
           u_int8_t ctl_cdb[16];   /* Command that Caused the Last Control Sense */
           /*
            * These are the read and write cumulative error counters.
            * (how to reset cumulative error counters is not yet defined).
            * (not implemented as yet but space is being reserved for them)
            */
           struct {
                   u_int32_t retries;      /* total # retries performed */
                   u_int32_t corrected;    /* total # corrections performed */
                   u_int32_t processed;    /* total # corrections successful */
                   u_int32_t failures;     /* total # corrections/retries failed */
                   u_int64_t nbytes;       /* total # bytes processed */
           } wterr, rderr;
   };
           
   union mterrstat {
           struct scsi_tape_errors scsi_errstat;
           char _reserved_padding[256];
   };
   
   /*
    * 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 */
   /* these two do not appear to be used anywhere */
   #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, u_int32_t) /* get logical blk addr */
   #define MTIOCRDHPOS     _IOR('m', 6, u_int32_t) /* get hardware blk addr */
   #define MTIOCSLOCATE    _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
   #define MTIOCHLOCATE    _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
   #define MTIOCERRSTAT    _IOR('m', 7, union mterrstat)   /* get tape errors */
   /*
    * Set EOT model- argument is number of filemarks to end a tape with.
    * Note that not all possible values will be accepted.
    */
   #define MTIOCSETEOTMODEL        _IOW('m', 8, u_int32_t)
   /* Get current EOT model */
   #define MTIOCGETEOTMODEL        _IOR('m', 8, u_int32_t)
   
   #ifndef _KERNEL
   #define DEFTAPE "/dev/nsa0"
   #endif
   
   #endif /* !_SYS_MTIO_H_ */

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