busdma_dmar.h revision 257251 
1/*-
2 * Copyright (c) 2013 The FreeBSD Foundation
3 * All rights reserved.
4 *
5 * This software was developed by Konstantin Belousov <kib@FreeBSD.org>
6 * under sponsorship from the FreeBSD Foundation.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 *    notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 *    notice, this list of conditions and the following disclaimer in the
15 *    documentation and/or other materials provided with the distribution.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 *
29 * $FreeBSD: head/sys/x86/iommu/busdma_dmar.h 257251 2013-10-28 13:33:29Z kib $
30 */
31
32#ifndef __X86_IOMMU_BUSDMA_DMAR_H
33#define __X86_IOMMU_BUSDMA_DMAR_H
34
35struct dmar_map_entry;
36TAILQ_HEAD(dmar_map_entries_tailq, dmar_map_entry);
37
38struct bus_dma_tag_dmar {
39	struct bus_dma_tag_common common;
40	struct dmar_ctx *ctx;
41	device_t owner;
42	int map_count;
43	bus_dma_segment_t *segments;
44};
45
46struct bus_dmamap_dmar {
47	struct bus_dma_tag_dmar *tag;
48	struct memdesc mem;
49	bus_dmamap_callback_t *callback;
50	void *callback_arg;
51	struct dmar_map_entries_tailq map_entries;
52	TAILQ_ENTRY(bus_dmamap_dmar) delay_link;
53	bool locked;
54	bool cansleep;
55	int flags;
56};
57
58#define	BUS_DMAMAP_DMAR_MALLOC	0x0001
59#define	BUS_DMAMAP_DMAR_KMEM_ALLOC 0x0002
60
61extern struct bus_dma_impl bus_dma_dmar_impl;
62
63bus_dma_tag_t dmar_get_dma_tag(device_t dev, device_t child);
64
65#endif
66