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Annotation of 43BSDReno/sys/hpstand/saio.h, revision 1.1

1.1     ! root        1: /*
        !             2:  * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
        !             3:  * All rights reserved.
        !             4:  *
        !             5:  * Redistribution is only permitted until one year after the first shipment
        !             6:  * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
        !             7:  * binary forms are permitted provided that: (1) source distributions retain
        !             8:  * this entire copyright notice and comment, and (2) distributions including
        !             9:  * binaries display the following acknowledgement:  This product includes
        !            10:  * software developed by the University of California, Berkeley and its
        !            11:  * contributors'' in the documentation or other materials provided with the
        !            12:  * distribution and in all advertising materials mentioning features or use
        !            13:  * of this software.  Neither the name of the University nor the names of
        !            14:  * its contributors may be used to endorse or promote products derived from
        !            15:  * this software without specific prior written permission.
        !            16:  * THIS SOFTWARE IS PROVIDED AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
        !            17:  * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
        !            18:  * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
        !            19:  *
        !            20:  *     @(#)saio.h      7.3 (Berkeley) 7/1/90
        !            21:  */
        !            22: 
        !            23: /*
        !            24:  * Header file for standalone package
        !            25:  */
        !            26: 
        !            27: #include <sys/param.h>
        !            28: #include "../ufs/dinode.h"
        !            29: #include "../ufs/fs.h"
        !            30: 
        !            31: /*
        !            32:  * Io block: includes a
        !            33:  * dinode, cells for the use of seek, etc,
        !            34:  * and a buffer.
        !            35:  */
        !            36: struct iob {
        !            37:        int     i_flgs;         /* see F_ below */
        !            38:        struct  dinode i_ino;   /* dinode, if file */
        !            39:        int     i_unit;         /* pseudo device unit */
        !            40:        daddr_t i_boff;         /* block offset on device */
        !            41:        daddr_t i_cyloff;       /* cylinder offset on device */
        !            42:        off_t   i_offset;       /* seek offset in file */
        !            43:        dev_t   i_dev;          /* associated device */
        !            44:        daddr_t i_bn;           /* 1st block # of next read */
        !            45:        char    *i_ma;          /* memory address of i/o buffer */
        !            46:        int     i_cc;           /* character count of transfer */
        !            47:        int     i_error;        /* error # return */
        !            48:        int     i_errcnt;       /* error count for driver retries */
        !            49:        int     i_errblk;       /* block # in error for error reporting */
        !            50:        char    i_buf[MAXBSIZE];/* i/o buffer */
        !            51:        union {
        !            52:                struct fs ui_fs;        /* file system super block info */
        !            53:                char dummy[SBSIZE];
        !            54:        } i_un;
        !            55: };
        !            56: #define i_fs i_un.ui_fs
        !            57: #define NULL 0
        !            58: 
        !            59: #define F_READ         0x1     /* file opened for reading */
        !            60: #define F_WRITE                0x2     /* file opened for writing */
        !            61: #define F_ALLOC                0x4     /* buffer allocated */
        !            62: #define F_FILE         0x8     /* file instead of device */
        !            63: #define F_NBSF         0x10    /* no bad sector forwarding */
        !            64: #define F_SSI          0x40    /* set skip sector inhibit */
        !            65: /* io types */
        !            66: #define        F_RDDATA        0x0100  /* read data */
        !            67: #define        F_WRDATA        0x0200  /* write data */
        !            68: #define F_HDR          0x0400  /* include header on next i/o */
        !            69: #define F_CHECK                0x0800  /* perform check of data read/write */
        !            70: #define F_HCHECK       0x1000  /* perform check of header and data */
        !            71: 
        !            72: #define        F_TYPEMASK      0xff00
        !            73: 
        !            74: /*
        !            75:  * Device switch.
        !            76:  */
        !            77: struct devsw {
        !            78:        char    *dv_name;
        !            79:        int     (*dv_strategy)();
        !            80:        int     (*dv_open)();
        !            81:        int     (*dv_close)();
        !            82:        int     (*dv_ioctl)();
        !            83: };
        !            84: 
        !            85: struct devsw devsw[];
        !            86: 
        !            87: /*
        !            88:  * Drive description table.
        !            89:  * Returned from SAIODEVDATA call.
        !            90:  */
        !            91: struct st {
        !            92:        short   nsect;          /* # sectors/track */
        !            93:        short   ntrak;          /* # tracks/surfaces/heads */
        !            94:        short   nspc;           /* # sectors/cylinder */
        !            95:        short   ncyl;           /* # cylinders */
        !            96:        short   *off;           /* partition offset table (cylinders) */
        !            97: };
        !            98: 
        !            99: /*
        !           100:  * Request codes. Must be the same a F_XXX above
        !           101:  */
        !           102: #define        READ    1
        !           103: #define        WRITE   2
        !           104: 
        !           105: #define        NBUFS   4
        !           106: 
        !           107: char   b[NBUFS][MAXBSIZE];
        !           108: daddr_t        blknos[NBUFS];
        !           109: 
        !           110: #define        NFILES  4
        !           111: struct iob iob[NFILES];
        !           112: 
        !           113: extern int errno;      /* just like unix */
        !           114: 
        !           115: /* error codes */
        !           116: #define        EBADF   1       /* bad file descriptor */
        !           117: #define        EOFFSET 2       /* relative seek not supported */
        !           118: #define        EDEV    3       /* improper device specification on open */
        !           119: #define        ENXIO   4       /* unknown device specified */
        !           120: #define        EUNIT   5       /* improper unit specification */
        !           121: #define        ESRCH   6       /* directory search for file failed */
        !           122: #define        EIO     7       /* generic error */
        !           123: #define        ECMD    10      /* undefined driver command */
        !           124: #define        EBSE    11      /* bad sector error */
        !           125: #define        EWCK    12      /* write check error */
        !           126: #define        EECC    13      /* uncorrectable ecc error */
        !           127: #define        EHER    14      /* hard error */
        !           128: 
        !           129: /* ioctl's -- for disks just now */
        !           130: #define        SAIOHDR         (('d'<<8)|1)    /* next i/o includes header */
        !           131: #define        SAIOCHECK       (('d'<<8)|2)    /* next i/o checks data */
        !           132: #define        SAIOHCHECK      (('d'<<8)|3)    /* next i/o checks header & data */
        !           133: #define        SAIONOBAD       (('d'<<8)|4)    /* inhibit bad sector forwarding */
        !           134: #define        SAIODOBAD       (('d'<<8)|5)    /* enable bad sector forwarding */
        !           135: #define        SAIOECCLIM      (('d'<<8)|6)    /* set limit to ecc correction, bits */
        !           136: #define        SAIORETRIES     (('d'<<8)|7)    /* set retry count for unit */
        !           137: #define        SAIODEVDATA     (('d'<<8)|8)    /* get device data */
        !           138: #define        SAIOSSI         (('d'<<8)|9)    /* set skip sector inhibit */
        !           139: #define        SAIONOSSI       (('d'<<8)|10)   /* inhibit skip sector handling */
        !           140: #define        SAIOSSDEV       (('d'<<8)|11)   /* is device skip sector type? */
        !           141: #define        SAIODEBUG       (('d'<<8)|12)   /* enable/disable debugging */
        !           142: #define        SAIOGBADINFO    (('d'<<8)|13)   /* get bad-sector table */

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