The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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

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    1 /*      $NetBSD: ldvar.h,v 1.15 2008/09/09 12:45:39 tron 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 
   37 struct ld_softc {
   38         struct  device *sc_dv;
   39         struct  disk sc_dk;
   40         struct  bufq_state *sc_bufq;
   41         kmutex_t sc_mutex;
   42 #if NRND > 0
   43         rndsource_element_t     sc_rnd_source;
   44 #endif
   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 
   50         /*
   51          * The following are filled by hardware specific attachment code.
   52          */
   53         int     sc_flags;               /* control flags */
   54         uint64_t        sc_secperunit;          /* # sectors in total */
   55         int     sc_secsize;             /* sector size in bytes */
   56         int     sc_maxxfer;             /* max xfer size in bytes */
   57         int     sc_maxqueuecnt;         /* maximum h/w queue depth */
   58 
   59         int     (*sc_dump)(struct ld_softc *, void *, int, int);
   60         int     (*sc_flush)(struct ld_softc *, int);
   61         int     (*sc_start)(struct ld_softc *, struct buf *);
   62 };
   63 
   64 /* sc_flags */
   65 #define LDF_ENABLED     0x001           /* device enabled */
   66 #define LDF_WLABEL      0x008           /* label is writable */
   67 #define LDF_LABELLING   0x010           /* writing label */
   68 #define LDF_DRAIN       0x020           /* maxqueuecnt has changed; drain */
   69 #define LDF_DETACH      0x040           /* detach pending */
   70 #define LDF_KLABEL      0x080           /* keep label on close */
   71 #define LDF_VLABEL      0x100           /* label is valid */
   72 
   73 /* sc_flush() flags */
   74 #define LDFL_POLL       0x001           /* poll for completion */
   75 
   76 int     ldadjqparam(struct ld_softc *, int);
   77 void    ldattach(struct ld_softc *);
   78 int     ldbegindetach(struct ld_softc *, int);
   79 void    ldenddetach(struct ld_softc *);
   80 void    lddone(struct ld_softc *, struct buf *);
   81 
   82 #endif  /* !_DEV_LDVAR_H_ */

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