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: src/sys/dev/firewire/fwdma.h,v 1.2 2003/05/27 16:34:52 scottl Exp $
35 * $DragonFly: src/sys/bus/firewire/fwdma.h,v 1.3 2004/02/05 13:32:08 joerg Exp $
36 */
37
38 struct fwdma_alloc {
39 bus_dma_tag_t dma_tag;
40 bus_dmamap_t dma_map;
41 void * v_addr;
42 bus_addr_t bus_addr;
43 };
44
45 struct fwdma_seg {
46 bus_dmamap_t dma_map;
47 void * v_addr;
48 bus_addr_t bus_addr;
49 };
50
51 struct fwdma_alloc_multi {
52 bus_size_t ssize;
53 bus_size_t esize;
54 int nseg;
55 bus_dma_tag_t dma_tag;
56 struct fwdma_seg seg[0];
57 };
58
59 static __inline void *
fwdma_v_addr(struct fwdma_alloc_multi * am,int index)60 fwdma_v_addr(struct fwdma_alloc_multi *am, int index)
61 {
62 bus_size_t ssize = am->ssize;
63 int offset = am->esize * index;
64
65 return ((caddr_t)am->seg[offset / ssize].v_addr + (offset % ssize));
66 }
67
68 static __inline bus_addr_t
fwdma_bus_addr(struct fwdma_alloc_multi * am,int index)69 fwdma_bus_addr(struct fwdma_alloc_multi *am, int index)
70 {
71 bus_size_t ssize = am->ssize;
72 int offset = am->esize * index;
73
74 return (am->seg[offset / ssize].bus_addr + (offset % ssize));
75 }
76
77 static __inline void
fwdma_sync(struct fwdma_alloc * dma,bus_dmasync_op_t op)78 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
79 {
80 bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
81 }
82
83 static __inline void
fwdma_sync_multiseg(struct fwdma_alloc_multi * am,int start,int end,bus_dmasync_op_t op)84 fwdma_sync_multiseg(struct fwdma_alloc_multi *am,
85 int start, int end, bus_dmasync_op_t op)
86 {
87 struct fwdma_seg *seg, *eseg;
88
89 seg = &am->seg[am->esize * start / am->ssize];
90 eseg = &am->seg[am->esize * end / am->ssize];
91 for (; seg <= eseg; seg ++)
92 bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
93 }
94
95 static __inline void
fwdma_sync_multiseg_all(struct fwdma_alloc_multi * am,bus_dmasync_op_t op)96 fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, bus_dmasync_op_t op)
97 {
98 struct fwdma_seg *seg;
99 int i;
100
101 seg = &am->seg[0];
102 for (i = 0; i < am->nseg; i++, seg++)
103 bus_dmamap_sync(am->dma_tag, seg->dma_map, op);
104 }
105
106 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
107 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
108 void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
109 void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
110 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
111 int, int, int, int);
112 void fwdma_free_multiseg(struct fwdma_alloc_multi *);
113
114