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 /*-
    2  * Copyright (c) 1982, 1986, 1993
    3  *      The Regents of the University of California.  All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer.
   10  * 2. Redistributions in binary form must reproduce the above copyright
   11  *    notice, this list of conditions and the following disclaimer in the
   12  *    documentation and/or other materials provided with the distribution.
   13  * 4. Neither the name of the University nor the names of its contributors
   14  *    may be used to endorse or promote products derived from this software
   15  *    without specific prior written permission.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   27  * SUCH DAMAGE.
   28  *
   29  *      @(#)mtio.h      8.1 (Berkeley) 6/2/93
   30  * $FreeBSD: releng/10.0/sys/sys/mtio.h 139825 2005-01-07 02:29:27Z imp $
   31  */
   32 
   33 #ifndef _SYS_MTIO_H_
   34 #define _SYS_MTIO_H_
   35 
   36 #ifndef _KERNEL
   37 #include <sys/types.h>
   38 #endif
   39 #include <sys/ioccom.h>
   40 
   41 /*
   42  * Structures and definitions for mag tape io control commands
   43  */
   44 
   45 /* structure for MTIOCTOP - mag tape op command */
   46 struct mtop {
   47         short   mt_op;          /* operations defined below */
   48         int32_t mt_count;       /* how many of them */
   49 };
   50 
   51 /* operations */
   52 #define MTWEOF          0       /* write an end-of-file record */
   53 #define MTFSF           1       /* forward space file */
   54 #define MTBSF           2       /* backward space file */
   55 #define MTFSR           3       /* forward space record */
   56 #define MTBSR           4       /* backward space record */
   57 #define MTREW           5       /* rewind */
   58 #define MTOFFL          6       /* rewind and put the drive offline */
   59 #define MTNOP           7       /* no operation, sets status only */
   60 #define MTCACHE         8       /* enable controller cache */
   61 #define MTNOCACHE       9       /* disable controller cache */
   62 
   63 #if defined(__FreeBSD__)
   64 /* Set block size for device. If device is a variable size dev          */
   65 /* a non zero parameter will change the device to a fixed block size    */
   66 /* device with block size set to that of the parameter passed in.       */
   67 /* Resetting the block size to 0 will restore the device to a variable  */
   68 /* block size device. */
   69 
   70 #define MTSETBSIZ       10
   71 
   72 /* Set density values for device. Sets the value for the opened mode only. */
   73 
   74 #define MTSETDNSTY      11
   75 
   76 #define MTERASE         12      /* erase to EOM */
   77 #define MTEOD           13      /* Space to EOM */
   78 #define MTCOMP          14      /* select compression mode 0=off, 1=def */
   79 #define MTRETENS        15      /* re-tension tape */
   80 #define MTWSS           16      /* write setmark(s) */
   81 #define MTFSS           17      /* forward space setmark */
   82 #define MTBSS           18      /* backward space setmark */
   83 
   84 #define MT_COMP_ENABLE          0xffffffff
   85 #define MT_COMP_DISABLED        0xfffffffe
   86 #define MT_COMP_UNSUPP          0xfffffffd
   87 
   88 /*
   89  * Values in mt_dsreg that say what the device is doing
   90  */
   91 #define MTIO_DSREG_NIL  0       /* Unknown */
   92 #define MTIO_DSREG_REST 1       /* Doing Nothing */
   93 #define MTIO_DSREG_RBSY 2       /* Communicating with tape (but no motion) */
   94 #define MTIO_DSREG_WR   20      /* Writing */
   95 #define MTIO_DSREG_FMK  21      /* Writing Filemarks */
   96 #define MTIO_DSREG_ZER  22      /* Erasing */
   97 #define MTIO_DSREG_RD   30      /* Reading */
   98 #define MTIO_DSREG_FWD  40      /* Spacing Forward */
   99 #define MTIO_DSREG_REV  41      /* Spacing Reverse */
  100 #define MTIO_DSREG_POS  42      /* Hardware Positioning (direction unknown) */
  101 #define MTIO_DSREG_REW  43      /* Rewinding */
  102 #define MTIO_DSREG_TEN  44      /* Retensioning */
  103 #define MTIO_DSREG_UNL  45      /* Unloading */
  104 #define MTIO_DSREG_LD   46      /* Loading */
  105 
  106 #endif  /* __FreeBSD__ */
  107 
  108 /* structure for MTIOCGET - mag tape get status command */
  109 
  110 struct mtget {
  111         short   mt_type;        /* type of magtape device */
  112 /* the following two registers are grossly device dependent */
  113         short   mt_dsreg;       /* ``drive status'' register */
  114         short   mt_erreg;       /* ``error'' register */
  115 /* end device-dependent registers */
  116         /*
  117          * Note that the residual count, while maintained, may be
  118          * be nonsense because the size of the residual may (greatly)
  119          * exceed 32 K-bytes. Use the MTIOCERRSTAT ioctl to get a
  120          * more accurate count.
  121          */
  122         short   mt_resid;       /* residual count */
  123 #if defined (__FreeBSD__)
  124         int32_t mt_blksiz;      /* presently operating blocksize */
  125         int32_t mt_density;     /* presently operating density */
  126         u_int32_t mt_comp;      /* presently operating compression */
  127         int32_t mt_blksiz0;     /* blocksize for mode 0 */
  128         int32_t mt_blksiz1;     /* blocksize for mode 1 */
  129         int32_t mt_blksiz2;     /* blocksize for mode 2 */
  130         int32_t mt_blksiz3;     /* blocksize for mode 3 */
  131         int32_t mt_density0;    /* density for mode 0 */
  132         int32_t mt_density1;    /* density for mode 1 */
  133         int32_t mt_density2;    /* density for mode 2 */
  134         int32_t mt_density3;    /* density for mode 3 */
  135 /* the following are not yet implemented */
  136         u_int32_t mt_comp0;     /* compression type for mode 0 */
  137         u_int32_t mt_comp1;     /* compression type for mode 1 */
  138         u_int32_t mt_comp2;     /* compression type for mode 2 */
  139         u_int32_t mt_comp3;     /* compression type for mode 3 */
  140 /* end not yet implemented */
  141 #endif
  142         int32_t mt_fileno;      /* relative file number of current position */
  143         int32_t mt_blkno;       /* relative block number of current position */
  144 };
  145 
  146 /* structure for MTIOCERRSTAT - tape get error status command */
  147 /* really only supported for SCSI tapes right now */
  148 struct scsi_tape_errors {
  149         /*
  150          * These are latched from the last command that had a SCSI
  151          * Check Condition noted for these operations. The act
  152          * of issuing an MTIOCERRSTAT unlatches and clears them.
  153          */
  154         u_int8_t io_sense[32];  /* Last Sense Data For Data I/O */
  155         int32_t io_resid;       /* residual count from last Data I/O */
  156         u_int8_t io_cdb[16];    /* Command that Caused the Last Data Sense */
  157         u_int8_t ctl_sense[32]; /* Last Sense Data For Control I/O */
  158         int32_t ctl_resid;      /* residual count from last Control I/O */
  159         u_int8_t ctl_cdb[16];   /* Command that Caused the Last Control Sense */
  160         /*
  161          * These are the read and write cumulative error counters.
  162          * (how to reset cumulative error counters is not yet defined).
  163          * (not implemented as yet but space is being reserved for them)
  164          */
  165         struct {
  166                 u_int32_t retries;      /* total # retries performed */
  167                 u_int32_t corrected;    /* total # corrections performed */
  168                 u_int32_t processed;    /* total # corrections successful */
  169                 u_int32_t failures;     /* total # corrections/retries failed */
  170                 u_int64_t nbytes;       /* total # bytes processed */
  171         } wterr, rderr;
  172 };
  173         
  174 union mterrstat {
  175         struct scsi_tape_errors scsi_errstat;
  176         char _reserved_padding[256];
  177 };
  178 
  179 /*
  180  * Constants for mt_type byte.  These are the same
  181  * for controllers compatible with the types listed.
  182  */
  183 #define MT_ISTS         0x01            /* TS-11 */
  184 #define MT_ISHT         0x02            /* TM03 Massbus: TE16, TU45, TU77 */
  185 #define MT_ISTM         0x03            /* TM11/TE10 Unibus */
  186 #define MT_ISMT         0x04            /* TM78/TU78 Massbus */
  187 #define MT_ISUT         0x05            /* SI TU-45 emulation on Unibus */
  188 #define MT_ISCPC        0x06            /* SUN */
  189 #define MT_ISAR         0x07            /* SUN */
  190 #define MT_ISTMSCP      0x08            /* DEC TMSCP protocol (TU81, TK50) */
  191 #define MT_ISCY         0x09            /* CCI Cipher */
  192 #define MT_ISCT         0x0a            /* HP 1/4 tape */
  193 #define MT_ISFHP        0x0b            /* HP 7980 1/2 tape */
  194 #define MT_ISEXABYTE    0x0c            /* Exabyte */
  195 #define MT_ISEXA8200    0x0c            /* Exabyte EXB-8200 */
  196 #define MT_ISEXA8500    0x0d            /* Exabyte EXB-8500 */
  197 #define MT_ISVIPER1     0x0e            /* Archive Viper-150 */
  198 #define MT_ISPYTHON     0x0f            /* Archive Python (DAT) */
  199 #define MT_ISHPDAT      0x10            /* HP 35450A DAT drive */
  200 #define MT_ISMFOUR      0x11            /* M4 Data 1/2 9track drive */
  201 #define MT_ISTK50       0x12            /* DEC SCSI TK50 */
  202 #define MT_ISMT02       0x13            /* Emulex MT02 SCSI tape controller */
  203 
  204 /* mag tape io control commands */
  205 #define MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
  206 #define MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */
  207 /* these two do not appear to be used anywhere */
  208 #define MTIOCIEOT       _IO('m', 3)                     /* ignore EOT error */
  209 #define MTIOCEEOT       _IO('m', 4)                     /* enable EOT error */
  210 /*
  211  * When more SCSI-3 SSC (streaming device) devices are out there
  212  * that support the full 32 byte type 2 structure, we'll have to
  213  * rethink these ioctls to support all the entities they haul into
  214  * the picture (64 bit blocks, logical file record numbers, etc..).
  215  */
  216 #define MTIOCRDSPOS     _IOR('m', 5, u_int32_t) /* get logical blk addr */
  217 #define MTIOCRDHPOS     _IOR('m', 6, u_int32_t) /* get hardware blk addr */
  218 #define MTIOCSLOCATE    _IOW('m', 5, u_int32_t) /* seek to logical blk addr */
  219 #define MTIOCHLOCATE    _IOW('m', 6, u_int32_t) /* seek to hardware blk addr */
  220 #define MTIOCERRSTAT    _IOR('m', 7, union mterrstat)   /* get tape errors */
  221 /*
  222  * Set EOT model- argument is number of filemarks to end a tape with.
  223  * Note that not all possible values will be accepted.
  224  */
  225 #define MTIOCSETEOTMODEL        _IOW('m', 8, u_int32_t)
  226 /* Get current EOT model */
  227 #define MTIOCGETEOTMODEL        _IOR('m', 8, u_int32_t)
  228 
  229 #ifndef _KERNEL
  230 #define DEFTAPE "/dev/nsa0"
  231 #endif
  232 
  233 #endif /* !_SYS_MTIO_H_ */

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