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/* $OpenBSD: sgmap.h,v 1.7 2008/06/26 05:42:14 ray Exp $ */
/* $NetBSD: sgmap.h,v 1.3 2000/05/17 21:22:18 matt Exp $ */
/*-
* Copyright (c) 1997, 1998 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Jason R. Thorpe of the Numerical Aerospace Simulation Facility,
* NASA Ames Research Center.
*
* 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.
*
* 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.
*/
#ifndef _VAX_COMMON_SGMAPVAR_H
#define _VAX_COMMON_SGMAPVAR_H
#include <sys/extent.h>
#include <machine/bus.h>
#include <machine/pte.h>
/*
* A VAX SGMAP's state information. Nothing in the sgmap requires
* locking[*], with the exception of the extent map. Locking of the
* extent map is handled within the extent manager itself.
*
* [*] While the page table is a `global' resource, access to it is
* controlled by the extent map; once a region has been allocated from
* the map, that region is effectively `locked'.
*/
struct vax_sgmap {
struct extent *aps_ex; /* extent map to manage sgva space */
pt_entry_t *aps_pt; /* page table */
bus_addr_t aps_sgvabase; /* base of the sgva space */
bus_size_t aps_sgvasize; /* size of the sgva space */
bus_addr_t aps_pa; /* Address in region */
unsigned int aps_flags; /* flags */
};
void vax_sgmap_init(bus_dma_tag_t, struct vax_sgmap *,
const char *, bus_addr_t, bus_size_t, pt_entry_t *, bus_size_t);
int vax_sgmap_alloc(bus_dmamap_t, bus_size_t,
struct vax_sgmap *, int);
void vax_sgmap_free(bus_dmamap_t, struct vax_sgmap *);
int vax_sgmap_load(bus_dma_tag_t, bus_dmamap_t, void *,
bus_size_t, struct proc *, int, struct vax_sgmap *);
int vax_sgmap_load_mbuf(bus_dma_tag_t, bus_dmamap_t,
struct mbuf *, int, struct vax_sgmap *);
int vax_sgmap_load_uio(bus_dma_tag_t, bus_dmamap_t,
struct uio *, int, struct vax_sgmap *);
int vax_sgmap_load_raw(bus_dma_tag_t, bus_dmamap_t,
bus_dma_segment_t *, int, bus_size_t, int, struct vax_sgmap *);
void vax_sgmap_unload( bus_dma_tag_t, bus_dmamap_t,
struct vax_sgmap *);
#endif /* _VAX_COMMON_SGMAPVAR_H */
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