usr/src/sys/hpstand/saio.h

/*
 * Copyright (c) 1982, 1986, 1990 The Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution is only permitted until one year after the first shipment
 * of 4.4BSD by the Regents.  Otherwise, redistribution and use in source and
 * binary forms are permitted provided that: (1) source distributions retain
 * this entire copyright notice and comment, and (2) distributions including
 * binaries display the following acknowledgement:  This product includes
 * software developed by the University of California, Berkeley and its
 * contributors'' in the documentation or other materials provided with the
 * distribution and in all advertising materials mentioning features or use
 * of this software.  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 AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED
 * WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
 *
 *      @(#)saio.h      7.3 (Berkeley) 7/1/90
 */

/*
 * Header file for standalone package
 */

#include <sys/param.h>
#include "../ufs/dinode.h"
#include "../ufs/fs.h"

/*
 * Io block: includes a
 * dinode, cells for the use of seek, etc,
 * and a buffer.
 */
struct  iob {
        int     i_flgs;         /* see F_ below */
        struct  dinode i_ino;   /* dinode, if file */
        int     i_unit;         /* pseudo device unit */
        daddr_t i_boff;         /* block offset on device */
        daddr_t i_cyloff;       /* cylinder offset on device */
        off_t   i_offset;       /* seek offset in file */
        dev_t   i_dev;          /* associated device */
        daddr_t i_bn;           /* 1st block # of next read */
        char    *i_ma;          /* memory address of i/o buffer */
        int     i_cc;           /* character count of transfer */
        int     i_error;        /* error # return */
        int     i_errcnt;       /* error count for driver retries */
        int     i_errblk;       /* block # in error for error reporting */
        char    i_buf[MAXBSIZE];/* i/o buffer */
        union {
                struct fs ui_fs;        /* file system super block info */
                char dummy[SBSIZE];
        } i_un;
};
#define i_fs i_un.ui_fs
#define NULL 0

#define F_READ          0x1     /* file opened for reading */
#define F_WRITE         0x2     /* file opened for writing */
#define F_ALLOC         0x4     /* buffer allocated */
#define F_FILE          0x8     /* file instead of device */
#define F_NBSF          0x10    /* no bad sector forwarding */
#define F_SSI           0x40    /* set skip sector inhibit */
/* io types */
#define F_RDDATA        0x0100  /* read data */
#define F_WRDATA        0x0200  /* write data */
#define F_HDR           0x0400  /* include header on next i/o */
#define F_CHECK         0x0800  /* perform check of data read/write */
#define F_HCHECK        0x1000  /* perform check of header and data */

#define F_TYPEMASK      0xff00

/*
 * Device switch.
 */
struct devsw {
        char    *dv_name;
        int     (*dv_strategy)();
        int     (*dv_open)();
        int     (*dv_close)();
        int     (*dv_ioctl)();
};

struct devsw devsw[];

/*
 * Drive description table.
 * Returned from SAIODEVDATA call.
 */
struct st {
        short   nsect;          /* # sectors/track */
        short   ntrak;          /* # tracks/surfaces/heads */
        short   nspc;           /* # sectors/cylinder */
        short   ncyl;           /* # cylinders */
        short   *off;           /* partition offset table (cylinders) */
};

/*
 * Request codes. Must be the same a F_XXX above
 */
#define READ    1
#define WRITE   2

#define NBUFS   4

char    b[NBUFS][MAXBSIZE];
daddr_t blknos[NBUFS];

#define NFILES  4
struct  iob iob[NFILES];

extern  int errno;      /* just like unix */

/* error codes */
#define EBADF   1       /* bad file descriptor */
#define EOFFSET 2       /* relative seek not supported */
#define EDEV    3       /* improper device specification on open */
#define ENXIO   4       /* unknown device specified */
#define EUNIT   5       /* improper unit specification */
#define ESRCH   6       /* directory search for file failed */
#define EIO     7       /* generic error */
#define ECMD    10      /* undefined driver command */
#define EBSE    11      /* bad sector error */
#define EWCK    12      /* write check error */
#define EECC    13      /* uncorrectable ecc error */
#define EHER    14      /* hard error */

/* ioctl's -- for disks just now */
#define SAIOHDR         (('d'<<8)|1)    /* next i/o includes header */
#define SAIOCHECK       (('d'<<8)|2)    /* next i/o checks data */
#define SAIOHCHECK      (('d'<<8)|3)    /* next i/o checks header & data */
#define SAIONOBAD       (('d'<<8)|4)    /* inhibit bad sector forwarding */
#define SAIODOBAD       (('d'<<8)|5)    /* enable bad sector forwarding */
#define SAIOECCLIM      (('d'<<8)|6)    /* set limit to ecc correction, bits */
#define SAIORETRIES     (('d'<<8)|7)    /* set retry count for unit */
#define SAIODEVDATA     (('d'<<8)|8)    /* get device data */
#define SAIOSSI         (('d'<<8)|9)    /* set skip sector inhibit */
#define SAIONOSSI       (('d'<<8)|10)   /* inhibit skip sector handling */
#define SAIOSSDEV       (('d'<<8)|11)   /* is device skip sector type? */
#define SAIODEBUG       (('d'<<8)|12)   /* enable/disable debugging */
#define SAIOGBADINFO    (('d'<<8)|13)   /* get bad-sector table */