hyperv_busdma.h revision 307466 
1/*-
2 * Copyright (c) 2016 Microsoft Corp.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice unmodified, this list of conditions, and the following
10 *    disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
16 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
17 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
18 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
19 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
20 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
21 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
22 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
23 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
24 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25 *
26 * $FreeBSD: stable/11/sys/dev/hyperv/include/hyperv_busdma.h 307466 2016-10-17 03:48:22Z sephe $
27 */
28
29#ifndef _HYPERV_BUSDMA_H_
30#define _HYPERV_BUSDMA_H_
31
32#include <sys/param.h>
33#include <sys/bus.h>
34#include <machine/bus.h>
35
36struct hyperv_dma {
37	bus_addr_t	hv_paddr;
38	bus_dma_tag_t	hv_dtag;
39	bus_dmamap_t	hv_dmap;
40};
41
42void		hyperv_dma_map_paddr(void *arg, bus_dma_segment_t *segs,
43		    int nseg, int error);
44void		*hyperv_dmamem_alloc(bus_dma_tag_t parent_dtag,
45		    bus_size_t alignment, bus_addr_t boundary, bus_size_t size,
46		    struct hyperv_dma *dma, int flags);
47void		hyperv_dmamem_free(struct hyperv_dma *dma, void *ptr);
48
49#endif	/* !_HYPERV_BUSDMA_H_ */
50