1/*-
2 * Copyright (c) 2015 Marcel Moolenaar
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 *
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following 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 * $FreeBSD$
27 */
28
29#ifndef _DEV_PROTO_BUSDMA_H_
30#define _DEV_PROTO_BUSDMA_H_
31
32struct proto_md;
33
34struct proto_tag {
35	LIST_ENTRY(proto_tag)	tags;
36	struct proto_tag	*parent;
37	LIST_ENTRY(proto_tag)	peers;
38	LIST_HEAD(,proto_tag)	children;
39	LIST_HEAD(,proto_md)	mds;
40	bus_addr_t		align;
41	bus_addr_t		bndry;
42	bus_addr_t		maxaddr;
43	bus_size_t		maxsz;
44	bus_size_t		maxsegsz;
45	u_int			nsegs;
46	u_int			datarate;
47};
48
49struct proto_md {
50	LIST_ENTRY(proto_md)	mds;
51	LIST_ENTRY(proto_md)	peers;
52	struct proto_tag	*tag;
53	void			*virtaddr;
54	vm_paddr_t		physaddr;
55	bus_dma_tag_t		bd_tag;
56	bus_dmamap_t		bd_map;
57};
58
59struct proto_busdma {
60	LIST_HEAD(,proto_tag)	tags;
61	LIST_HEAD(,proto_md)	mds;
62	bus_dma_tag_t		bd_roottag;
63};
64
65struct proto_busdma *proto_busdma_attach(struct proto_softc *);
66int proto_busdma_detach(struct proto_softc *, struct proto_busdma *);
67
68int proto_busdma_cleanup(struct proto_softc *, struct proto_busdma *);
69
70int proto_busdma_ioctl(struct proto_softc *, struct proto_busdma *,
71    struct proto_ioc_busdma *, struct thread *);
72
73int proto_busdma_mmap_allowed(struct proto_busdma *, vm_paddr_t);
74
75#endif /* _DEV_PROTO_BUSDMA_H_ */
76