ldvar.h

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    1 /*      $NetBSD: ldvar.h,v 1.35 2021/05/30 11:24:02 riastradh Exp $     */
    2 
    3 /*-
    4  * Copyright (c) 2000 The NetBSD Foundation, Inc.
    5  * All rights reserved.
    6  *
    7  * This code is derived from software contributed to The NetBSD Foundation
    8  * by Andrew Doran.
    9  *
   10  * Redistribution and use in source and binary forms, with or without
   11  * modification, are permitted provided that the following conditions
   12  * are met:
   13  * 1. Redistributions of source code must retain the above copyright
   14  *    notice, this list of conditions and the following disclaimer.
   15  * 2. Redistributions in binary form must reproduce the above copyright
   16  *    notice, this list of conditions and the following disclaimer in the
   17  *    documentation and/or other materials provided with the distribution.
   18  *
   19  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
   20  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
   21  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
   22  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
   23  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   24  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   25  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   26  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   27  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   28  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
   29  * POSSIBILITY OF SUCH DAMAGE.
   30  */
   31 
   32 #ifndef _DEV_LDVAR_H_
   33 #define _DEV_LDVAR_H_
   34 
   35 #include <sys/mutex.h>
   36 #include <sys/rndsource.h>
   37 
   38 #include <dev/dkvar.h> /* for dk_softc */
   39 
   40 struct ld_softc {
   41         struct dk_softc sc_dksc;
   42         kmutex_t        sc_mutex;
   43         kcondvar_t      sc_drain;
   44 
   45         int             sc_queuecnt;    /* current h/w queue depth */
   46         int             sc_ncylinders;  /* # cylinders */
   47         int             sc_nheads;      /* # heads */
   48         int             sc_nsectors;    /* # sectors per track */
   49         uint64_t        sc_disksize512;
   50 
   51         /*
   52          * The following are filled by hardware specific attachment code.
   53          */
   54         device_t        sc_dv;
   55         int             sc_flags;       /* control flags */
   56         uint64_t        sc_secperunit;  /* # sectors in total */
   57         int             sc_secsize;     /* sector size in bytes */
   58         int             sc_maxxfer;     /* max xfer size in bytes */
   59         int             sc_maxqueuecnt; /* maximum h/w queue depth */
   60         char            *sc_typename;   /* inquiry data */
   61 
   62         int             (*sc_dump)(struct ld_softc *, void *, int, int);
   63         int             (*sc_ioctl)(struct ld_softc *, u_long, void *, int32_t, bool);
   64         int             (*sc_start)(struct ld_softc *, struct buf *);
   65         int             (*sc_discard)(struct ld_softc *, struct buf *);
   66 };
   67 
   68 /* sc_flags */
   69 #define LDF_ENABLED     0x001           /* device enabled */
   70 #define LDF_UNUSED0     0x020           /* was LDF_DRAIN */
   71 #define LDF_NO_RND      0x040           /* do not attach rnd source */
   72 #define LDF_MPSAFE      0x080           /* backend is MPSAFE */
   73 #define LDF_SUSPEND     0x100           /* disk is suspended until resume */
   74 
   75 int     ldadjqparam(struct ld_softc *, int);
   76 void    ldattach(struct ld_softc *, const char *);
   77 int     ldbegindetach(struct ld_softc *, int);
   78 void    ldenddetach(struct ld_softc *);
   79 void    lddone(struct ld_softc *, struct buf *);
   80 void    lddiscardend(struct ld_softc *, struct buf *);
   81 
   82 #endif  /* !_DEV_LDVAR_H_ */

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FreeBSD/Linux Kernel Cross Reference sys/dev/ldvar.h

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sys/dev/ldvar.h