FreeBSD/Linux Kernel Cross Reference
sys/dev/isa/fdvar.h

     /* $NetBSD: fdvar.h,v 1.1 2003/01/08 23:51:11 jmcneill Exp $ */
     
     /*-
      * Copyright (c) 1998 The NetBSD Foundation, Inc.
      * All rights reserved.
      *
      * This code is derived from software contributed to The NetBSD Foundation
      * by Charles M. Hannum.
      *
     * Redistribution and use in source and binary forms, with or without
     * modification, are permitted provided that the following conditions
     * are met:
     * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     * 3. All advertising materials mentioning features or use of this software
     *    must display the following acknowledgement:
     *        This product includes software developed by the NetBSD
     *        Foundation, Inc. and its contributors.
     * 4. Neither the name of The NetBSD Foundation 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 BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
     * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
     * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
     * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
     * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
     * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
     * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
     * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
     * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
     * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
     * POSSIBILITY OF SUCH DAMAGE.
     */
    
    #include "rnd.h"
    
    #if NRND > 0
    #include <sys/rnd.h>
    #endif
    
    /*
     * Floppies come in various flavors, e.g., 1.2MB vs 1.44MB; here is how
     * we tell them apart.
     */
    struct fd_type {
            int     sectrac;        /* sectors per track */
            int     heads;          /* number of heads */
            int     seccyl;         /* sectors per cylinder */
            int     secsize;        /* size code for sectors */
            int     datalen;        /* data len when secsize = 0 */
            int     steprate;       /* step rate and head unload time */
            int     gap1;           /* gap len between sectors */
            int     gap2;           /* formatting gap */
            int     cyls;           /* total num of cylinders */
            int     size;           /* size of disk in sectors */
            int     step;           /* steps per cylinder */
            int     rate;           /* transfer speed code */
            u_char  fillbyte;       /* format fill byte */
            u_char  interleave;     /* interleave factor (formatting) */
            const char      *name;
    };
    
    /* software state, per disk (with up to 4 disks per ctlr) */
    struct fd_softc {
            struct device sc_dev;
            struct disk sc_dk;
    
            const struct fd_type *sc_deftype; /* default type descriptor */
            struct fd_type *sc_type;        /* current type descriptor */
            struct fd_type sc_type_copy;    /* copy for fiddling when formatting */
    
            struct callout sc_motoron_ch;
            struct callout sc_motoroff_ch;
    
            daddr_t sc_blkno;       /* starting block number */
            int sc_bcount;          /* byte count left */
            int sc_opts;            /* user-set options */
            int sc_skip;            /* bytes already transferred */
            int sc_nblks;           /* number of blocks currently transferring */
            int sc_nbytes;          /* number of bytes currently transferring */
    
            int sc_drive;           /* physical unit number */
            int sc_flags;
    #define FD_OPEN         0x01            /* it's open */
    #define FD_MOTOR        0x02            /* motor should be on */
    #define FD_MOTOR_WAIT   0x04            /* motor coming up */
            int sc_cylin;           /* where we think the head is */
    
            void *sc_sdhook;        /* saved shutdown hook for drive. */
    
            TAILQ_ENTRY(fd_softc) sc_drivechain;
            int sc_ops;             /* I/O ops since last switch */
            struct bufq_state sc_q; /* pending I/O requests */
            int sc_active;          /* number of active I/O operations */
    
   #if NRND > 0
           rndsource_element_t     rnd_source;
   #endif
   };

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