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Annotation of 43BSDTahoe/sys/h/mtio.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * Copyright (c) 1982, 1986 Regents of the University of California.
                      3:  * All rights reserved.  The Berkeley software License Agreement
                      4:  * specifies the terms and conditions for redistribution.
                      5:  *
                      6:  *     @(#)mtio.h      7.3 (Berkeley) 12/18/87
                      7:  */
                      8: 
                      9: /*
                     10:  * Structures and definitions for mag tape io control commands
                     11:  */
                     12: 
                     13: /* structure for MTIOCTOP - mag tape op command */
                     14: struct mtop    {
                     15:        short   mt_op;          /* operations defined below */
                     16:        daddr_t mt_count;       /* how many of them */
                     17: };
                     18: 
                     19: /* operations */
                     20: #define MTWEOF 0       /* write an end-of-file record */
                     21: #define MTFSF  1       /* forward space file */
                     22: #define MTBSF  2       /* backward space file */
                     23: #define MTFSR  3       /* forward space record */
                     24: #define MTBSR  4       /* backward space record */
                     25: #define MTREW  5       /* rewind */
                     26: #define MTOFFL 6       /* rewind and put the drive offline */
                     27: #define MTNOP  7       /* no operation, sets status only */
                     28: #define MTCACHE        8       /* enable controller cache */
                     29: #define MTNOCACHE 9    /* disable controller cache */
                     30: 
                     31: /* structure for MTIOCGET - mag tape get status command */
                     32: 
                     33: struct mtget   {
                     34:        short   mt_type;        /* type of magtape device */
                     35: /* the following two registers are grossly device dependent */
                     36:        short   mt_dsreg;       /* ``drive status'' register */
                     37:        short   mt_erreg;       /* ``error'' register */
                     38: /* end device-dependent registers */
                     39:        short   mt_resid;       /* residual count */
                     40: /* the following two are not yet implemented */
                     41:        daddr_t mt_fileno;      /* file number of current position */
                     42:        daddr_t mt_blkno;       /* block number of current position */
                     43: /* end not yet implemented */
                     44: };
                     45: 
                     46: /*
                     47:  * Constants for mt_type byte.  These are the same
                     48:  * for controllers compatible with the types listed.
                     49:  */
                     50: #define        MT_ISTS         0x01            /* TS-11 */
                     51: #define        MT_ISHT         0x02            /* TM03 Massbus: TE16, TU45, TU77 */
                     52: #define        MT_ISTM         0x03            /* TM11/TE10 Unibus */
                     53: #define        MT_ISMT         0x04            /* TM78/TU78 Massbus */
                     54: #define        MT_ISUT         0x05            /* SI TU-45 emulation on Unibus */
                     55: #define        MT_ISCPC        0x06            /* SUN */
                     56: #define        MT_ISAR         0x07            /* SUN */
                     57: #define        MT_ISTMSCP      0x08            /* DEC TMSCP protocol (TU81, TK50) */
                     58: #define        MT_ISCY         0x09            /* CCI Cipher */
                     59: 
                     60: /* mag tape io control commands */
                     61: #define        MTIOCTOP        _IOW('m', 1, struct mtop)       /* do a mag tape op */
                     62: #define        MTIOCGET        _IOR('m', 2, struct mtget)      /* get tape status */
                     63: #define MTIOCIEOT      _IO('m', 3)                     /* ignore EOT error */
                     64: #define MTIOCEEOT      _IO('m', 4)                     /* enable EOT error */
                     65: 
                     66: #ifndef KERNEL
                     67: #define        DEFTAPE "/dev/rmt12"
                     68: #endif

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