The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: mtio.h,v 1.21 2003/08/07 16:34:09 agc Exp $    */
    2 
    3 /*
    4  * Copyright (c) 1982, 1986, 1993
    5  *      The Regents of the University of California.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. Neither the name of the University nor the names of its contributors
   16  *    may be used to endorse or promote products derived from this software
   17  *    without specific prior written permission.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   29  * SUCH DAMAGE.
   30  *
   31  *      @(#)mtio.h      8.1 (Berkeley) 6/2/93
   32  */
   33 
   34 #ifndef _SYS_MTIO_H_
   35 #define _SYS_MTIO_H_
   36 
   37 /*
   38  * Structures and definitions for mag tape io control commands
   39  */
   40 
   41 /* structure for MTIOCTOP - mag tape op command */
   42 struct mtop {
   43         short   mt_op;          /* operations defined below */
   44         int32_t mt_count;       /* how many of them */
   45 };
   46 
   47 /* operations */
   48 #define MTWEOF          0       /* write an end-of-file record */
   49 #define MTFSF           1       /* forward space file */
   50 #define MTBSF           2       /* backward space file */
   51 #define MTFSR           3       /* forward space record */
   52 #define MTBSR           4       /* backward space record */
   53 #define MTREW           5       /* rewind */
   54 #define MTOFFL          6       /* rewind and put the drive offline */
   55 #define MTNOP           7       /* no operation, sets status only */
   56 #define MTRETEN         8       /* retension */
   57 #define MTERASE         9       /* erase entire tape */
   58 #define MTEOM           10      /* forward to end of media */
   59 #define MTNBSF          11      /* backward space to beginning of file */
   60 #define MTCACHE         12      /* enable controller cache */
   61 #define MTNOCACHE       13      /* disable controller cache */
   62 #define MTSETBSIZ       14      /* set block size; 0 for variable */
   63 #define MTSETDNSTY      15      /* set density code for current mode */
   64 #define MTCMPRESS       16      /* set/clear device compression */
   65 #define MTEWARN         17      /* set/clear early warning behaviour */
   66 
   67 /* structure for MTIOCGET - mag tape get status command */
   68 
   69 struct mtget {
   70         short   mt_type;        /* type of magtape device */
   71 /* the following two registers are grossly device dependent */
   72         short   mt_dsreg;       /* ``drive status'' register */
   73         short   mt_erreg;       /* ``error'' register */
   74 /* end device-dependent registers */
   75         short   mt_resid;       /* residual count */
   76 /* the following two are not yet implemented by most tape drivers */
   77         int32_t mt_fileno;      /* file number of current position */
   78         int32_t mt_blkno;       /* block number of current position */
   79 /* end not yet implemented */
   80         int32_t mt_blksiz;      /* current block size */
   81         int32_t mt_density;     /* current density code */
   82         int32_t mt_mblksiz[4];  /* block size for different modes */
   83         int32_t mt_mdensity[4]; /* density codes for different modes */
   84 };
   85 
   86 /*
   87  * Constants for mt_type byte.  These are the same
   88  * for controllers compatible with the types listed.
   89  */
   90 #define MT_ISTS         0x01            /* TS-11 */
   91 #define MT_ISHT         0x02            /* TM03 Massbus: TE16, TU45, TU77 */
   92 #define MT_ISTM         0x03            /* TM11/TE10 Unibus */
   93 #define MT_ISMT         0x04            /* TM78/TU78 Massbus */
   94 #define MT_ISUT         0x05            /* SI TU-45 emulation on Unibus */
   95 #define MT_ISCPC        0x06            /* SUN */
   96 #define MT_ISAR         0x07            /* SUN - Also "GENERIC SCSI" */
   97 #define MT_ISTMSCP      0x08            /* DEC TMSCP protocol (TU81, TK50) */
   98 #define MT_ISCY         0x09            /* CCI Cipher */
   99 #define MT_ISCT         0x0a            /* HP 1/4 tape */
  100 #define MT_ISFHP        0x0b            /* HP 7980 1/2 tape */
  101 #define MT_ISEXABYTE    0x0c            /* Exabyte */
  102 #define MT_ISEXA8200    0x0c            /* Exabyte EXB-8200 */
  103 #define MT_ISEXA8500    0x0d            /* Exabyte EXB-8500 */
  104 #define MT_ISVIPER1     0x0e            /* Archive Viper-150 */
  105 #define MT_ISPYTHON     0x0f            /* Archive Python (DAT) */
  106 #define MT_ISHPDAT      0x10            /* HP 35450A DAT drive */
  107 #define MT_ISWANGTEK    0x11            /* WANGTEK 5150ES */
  108 #define MT_ISCALIPER    0x12            /* Caliper CP150 */
  109 #define MT_ISWTEK5099   0x13            /* WANGTEK 5099ES */
  110 #define MT_ISVIPER2525  0x14            /* Archive Viper 2525 */
  111 #define MT_ISMFOUR      0x11            /* M4 Data 1/2 9track drive */
  112 #define MT_ISTK50       0x12            /* DEC SCSI TK50 */
  113 #define MT_ISMT02       0x13            /* Emulex MT02 SCSI tape controller */
  114 
  115 /* bits defined for the mt_dsreg field */
  116 #define MT_DS_RDONLY    0x10            /* tape mounted readonly */
  117 #define MT_DS_MOUNTED   0x03            /* tape mounted (for control opens) */
  118 
  119 /*
  120  * For the mt_erreg field.....This is supposed to be a *generic*
  121  * MT interface, so we cannot overload it with SCSI specific entities,
  122  * (like ASC/ASCQ) nor is there enough room to put all the information
  123  * in that is desirable. This whole structure should be redone.
  124  *
  125  * In the interim, this will be considered device-specific. For SCSI,
  126  * this will be taken to mean the last Sense Key seen. It is not
  127  * guaranteed to always be sensibly associated with any command.
  128  */
  129 
  130 /*
  131  * The action of a MTIOCGET command clears mt_dsreg, mt_erreg, and mt_resid
  132  */
  133 
  134 /* mag tape io control commands */
  135 #define MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
  136 #define MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */
  137 #define MTIOCIEOT       _IO('m', 3)                     /* ignore EOT error */
  138 #define MTIOCEEOT       _IO('m', 4)                     /* enable EOT error */
  139 /*
  140  * When more SCSI-3 SSC (streaming device) devices are out there
  141  * that support the full 32 byte type 2 structure, we'll have to
  142  * rethink these ioctls to support all the entities they haul into
  143  * the picture (64 bit blocks, logical file record numbers, etc..).
  144  */
  145 #define MTIOCRDSPOS     _IOR('m', 5, u_int32_t) /* get logical blk addr */
  146 #define MTIOCRDHPOS     _IOR('m', 6, u_int32_t) /* get hardware blk addr */
  147 #define MTIOCSLOCATE    _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
  148 #define MTIOCHLOCATE    _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
  149 
  150 #ifdef  _KERNEL
  151 /*
  152  * minor device number
  153  */
  154 
  155 #define T_UNIT          003             /* unit selection */
  156 #define T_NOREWIND      004             /* no rewind on close */
  157 #define T_DENSEL        030             /* density select */
  158 #define T_800BPI        000             /* select  800 bpi */
  159 #define T_1600BPI       010             /* select 1600 bpi */
  160 #define T_6250BPI       020             /* select 6250 bpi */
  161 #define T_BADBPI        030             /* undefined selection */
  162 #endif /* _KERNEL */
  163 
  164 #endif /* !_SYS_MTIO_H_ */

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