fwdma.h revision 113584 
1/*
2 * Copyright (C) 2003
3 * 	Hidetoshi Shimokawa. 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, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 *    must display the following acknowledgement:
15 *
16 *	This product includes software developed by Hidetoshi Shimokawa.
17 *
18 * 4. Neither the name of the author nor the names of its contributors
19 *    may be used to endorse or promote products derived from this software
20 *    without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
33 *
34 * $FreeBSD: head/sys/dev/firewire/fwdma.h 113584 2003-04-17 03:38:03Z simokawa $
35 */
36
37#if __FreeBSD_version >= 500111
38typedef int bus_dmasync_op_t;
39#endif
40
41struct fwdma_alloc {
42	bus_dma_tag_t	dma_tag;
43	bus_dmamap_t	dma_map;
44	void *		v_addr;
45	bus_addr_t	bus_addr;
46};
47
48struct fwdma_seg {
49	bus_dmamap_t	dma_map;
50	void *		v_addr;
51	bus_addr_t	bus_addr;
52};
53
54struct fwdma_alloc_multi {
55	bus_size_t	ssize;
56	bus_size_t	esize;
57	int		nseg;
58	bus_dma_tag_t	dma_tag;
59	struct fwdma_seg seg[0];
60};
61
62static __inline void *
63fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
64{
65	bus_size_t ssize = am->ssize;
66	int offset = am->esize * index;
67
68	return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize));
69}
70
71static __inline bus_addr_t
72fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
73{
74	bus_size_t ssize = am->ssize;
75	int offset = am->esize * index;
76
77	return (am->seg[offset / ssize].bus_addr + (offset % ssize));
78}
79
80static __inline void
81fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
82{
83	bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
84}
85
86static __inline void
87fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
88			int start, int end, bus_dmasync_op_t op)
89{
90	struct fwdma_seg *seg, *eseg;
91
92	seg = &am->seg[am->esize * start / am->ssize];
93	eseg = &am->seg[am->esize * end / am->ssize];
94	for (; seg <= eseg; seg ++)
95		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
96}
97
98static __inline void
99fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op)
100{
101	struct fwdma_seg *seg;
102	int i;
103
104	seg = &am->seg[0];
105	for (i = 0; i < am->nseg; i++, seg++)
106		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
107}
108
109void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
110void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
111void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
112void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
113struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
114	int, int, int, int);
115void fwdma_free_multiseg(struct fwdma_alloc_multi *);
116
117