sys/dev/ldvar.h

   1 /*      $NetBSD: ldvar.h,v 1.16 2009/05/07 08:03:23 cegger 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 "rnd.h"
  36
  37 #include <sys/mutex.h>
  38 #include <sys/device.h> /* for device_t */
  39 #if NRND > 0
  40 #include <sys/rnd.h>
  41 #endif
  42
  43 struct ld_softc {
  44         device_t sc_dv;
  45         struct  disk sc_dk;
  46         struct  bufq_state *sc_bufq;
  47         kmutex_t sc_mutex;
  48 #if NRND > 0
  49         rndsource_element_t     sc_rnd_source;
  50 #endif
  51         int     sc_queuecnt;            /* current h/w queue depth */
  52         int     sc_ncylinders;          /* # cylinders */
  53         int     sc_nheads;              /* # heads */
  54         int     sc_nsectors;            /* # sectors per track */
  55
  56         /*
  57          * The following are filled by hardware specific attachment code.
  58          */
  59         int     sc_flags;               /* control flags */
  60         uint64_t        sc_secperunit;          /* # sectors in total */
  61         int     sc_secsize;             /* sector size in bytes */
  62         int     sc_maxxfer;             /* max xfer size in bytes */
  63         int     sc_maxqueuecnt;         /* maximum h/w queue depth */
  64
  65         int     (*sc_dump)(struct ld_softc *, void *, int, int);
  66         int     (*sc_flush)(struct ld_softc *, int);
  67         int     (*sc_start)(struct ld_softc *, struct buf *);
  68 };
  69
  70 /* sc_flags */
  71 #define LDF_ENABLED     0x001           /* device enabled */
  72 #define LDF_WLABEL      0x008           /* label is writable */
  73 #define LDF_LABELLING   0x010           /* writing label */
  74 #define LDF_DRAIN       0x020           /* maxqueuecnt has changed; drain */
  75 #define LDF_DETACH      0x040           /* detach pending */
  76 #define LDF_KLABEL      0x080           /* keep label on close */
  77 #define LDF_VLABEL      0x100           /* label is valid */
  78
  79 /* sc_flush() flags */
  80 #define LDFL_POLL       0x001           /* poll for completion */
  81
  82 int     ldadjqparam(struct ld_softc *, int);
  83 void    ldattach(struct ld_softc *);
  84 int     ldbegindetach(struct ld_softc *, int);
  85 void    ldenddetach(struct ld_softc *);
  86 void    lddone(struct ld_softc *, struct buf *);
  87
  88 #endif  /* !_DEV_LDVAR_H_ */