sys/arch/vax/include/sgmap.h

   1 /* $NetBSD: sgmap.h,v 1.5 2008/02/03 08:39:48 matt Exp $ */
   2
   3 /*-
   4  * Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
   5  * All rights reserved.
   6  *
   7  * This code is derived from software contributed to The NetBSD Foundation
   8  * by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
   9  * NASA Ames Research Center.
  10  *
  11  * Redistribution and use in source and binary forms, with or without
  12  * modification, are permitted provided that the following conditions
  13  * are met:
  14  * 1. Redistributions of source code must retain the above copyright
  15  *    notice, this list of conditions and the following disclaimer.
  16  * 2. Redistributions in binary form must reproduce the above copyright
  17  *    notice, this list of conditions and the following disclaimer in the
  18  *    documentation and/or other materials provided with the distribution.
  19  *
  20  * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
  21  * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
  22  * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  23  * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
  24  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  25  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  26  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  27  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  28  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  29  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
  30  * POSSIBILITY OF SUCH DAMAGE.
  31  */
  32
  33 #ifndef _VAX_SGMAP_H
  34 #define _VAX_SGMAP_H
  35
  36 #include <sys/extent.h>
  37 #include <machine/bus.h>
  38 #include <machine/pte.h>
  39
  40 /*
  41  * A VAX SGMAP's state information.  Nothing in the sgmap requires
  42  * locking[*], with the exception of the extent map.  Locking of the
  43  * extent map is handled within the extent manager itself.
  44  *
  45  * [*] While the page table is a `global' resource, access to it is
  46  * controlled by the extent map; once a region has been allocated from
  47  * the map, that region is effectively `locked'.
  48  */
  49 struct vax_sgmap {
  50         struct extent *aps_ex;          /* extent map to manage sgva space */
  51         struct pte *aps_pt;             /* page table */
  52         bus_addr_t aps_sgvabase;        /* base of the sgva space */
  53         bus_size_t aps_sgvasize;        /* size of the sgva space */
  54         bus_addr_t aps_pa;              /* Address in region */
  55         unsigned int aps_flags;         /* flags */
  56 };
  57
  58 void    vax_sgmap_dmatag_init(bus_dma_tag_t, void *, size_t);
  59
  60 void    vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *, const char *,
  61             bus_addr_t, bus_size_t, struct pte *, bus_size_t);
  62
  63 int     vax_sgmap_alloc(bus_dmamap_t, bus_size_t, struct vax_sgmap *, int);
  64 void    vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *);
  65
  66 int     vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t,
  67             struct proc *, int, struct vax_sgmap *);
  68
  69 int     vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t, struct mbuf *, int,
  70             struct vax_sgmap *);
  71
  72 int     vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t, struct uio *, int,
  73             struct vax_sgmap *);
  74
  75 int     vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t, bus_dma_segment_t *,
  76             int, bus_size_t, int, struct vax_sgmap *);
  77
  78 void    vax_sgmap_unload(bus_dma_tag_t, bus_dmamap_t, struct vax_sgmap *);
  79
  80 #endif  /* _VAX_SGMAP_H */