fwdma.h revision 331722 
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: stable/11/sys/dev/firewire/fwdma.h 331722 2018-03-29 02:50:57Z eadler $
35 */
36
37struct fwdma_alloc {
38	bus_dma_tag_t	dma_tag;
39	bus_dmamap_t	dma_map;
40	void 		*v_addr;
41	bus_addr_t	bus_addr;
42};
43
44struct fwdma_seg {
45	bus_dmamap_t	dma_map;
46	void 		*v_addr;
47	bus_addr_t	bus_addr;
48};
49
50struct fwdma_alloc_multi {
51	bus_size_t	ssize;
52	bus_size_t	esize;
53	int		nseg;
54	bus_dma_tag_t	dma_tag;
55	struct fwdma_seg seg[0];
56};
57
58static __inline void *
59fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
60{
61	bus_size_t ssize = am->ssize;
62	int offset = am->esize * index;
63
64	return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize));
65}
66
67static __inline bus_addr_t
68fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
69{
70	bus_size_t ssize = am->ssize;
71	int offset = am->esize * index;
72
73	return (am->seg[offset / ssize].bus_addr + (offset % ssize));
74}
75
76static __inline void
77fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
78{
79	bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
80}
81
82static __inline void
83fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
84    int start, int end, bus_dmasync_op_t op)
85{
86	struct fwdma_seg *seg, *eseg;
87
88	seg = &am->seg[am->esize * start / am->ssize];
89	eseg = &am->seg[am->esize * end / am->ssize];
90	for (; seg <= eseg; seg++)
91		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
92}
93
94static __inline void
95fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op)
96{
97	struct fwdma_seg *seg;
98	int i;
99
100	seg = &am->seg[0];
101	for (i = 0; i < am->nseg; i++, seg++)
102		bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
103}
104
105void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
106void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
107void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
108void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
109struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
110	int, int, int, int);
111void fwdma_free_multiseg(struct fwdma_alloc_multi *);
112
113