1 | /* $NetBSD: fwdma.h,v 1.6 2010/03/29 03:05:27 kiyohara Exp $ */ |
2 | /*- |
3 | * Copyright (C) 2003 |
4 | * Hidetoshi Shimokawa. All rights reserved. |
5 | * |
6 | * Redistribution and use in source and binary forms, with or without |
7 | * modification, are permitted provided that the following conditions |
8 | * are met: |
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 | * 3. All advertising materials mentioning features or use of this software |
15 | * must display the following acknowledgement: |
16 | * |
17 | * This product includes software developed by Hidetoshi Shimokawa. |
18 | * |
19 | * 4. Neither the name of the author nor the names of its contributors |
20 | * may be used to endorse or promote products derived from this software |
21 | * without specific prior written permission. |
22 | * |
23 | * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
24 | * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
25 | * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
26 | * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
27 | * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
28 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
29 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
30 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
31 | * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
32 | * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
33 | * SUCH DAMAGE. |
34 | * |
35 | * $FreeBSD: /repoman/r/ncvs/src/sys/dev/firewire/fwdma.h,v 1.3 2005/01/06 01:42:41 imp Exp $ |
36 | */ |
37 | |
38 | #ifndef _FWDMA_H_ |
39 | #define _FWDMA_H_ |
40 | |
41 | struct 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 | |
48 | struct fwdma_seg { |
49 | bus_dmamap_t dma_map; |
50 | void * v_addr; |
51 | bus_addr_t bus_addr; |
52 | }; |
53 | |
54 | struct 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 | |
62 | static __inline void * |
63 | fwdma_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 (char *)am->seg[offset / ssize].v_addr + (offset % ssize); |
69 | } |
70 | |
71 | static __inline bus_addr_t |
72 | fwdma_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 | |
80 | static __inline void |
81 | fwdma_sync_multiseg(struct fwdma_alloc_multi *am, int start, int end, int op) |
82 | { |
83 | struct fwdma_seg *seg, *eseg; |
84 | bus_addr_t off, eoff; |
85 | |
86 | off = (am->esize * start) % am->ssize; |
87 | eoff = (am->esize * end) % am->ssize; |
88 | seg = &am->seg[am->esize * start / am->ssize]; |
89 | eseg = &am->seg[am->esize * end / am->ssize]; |
90 | |
91 | if (start > end) { |
92 | for (; seg < &am->seg[am->nseg]; seg++) { |
93 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
94 | off, seg->dma_map->dm_mapsize - off, op); |
95 | off = 0; |
96 | } |
97 | seg = am->seg; |
98 | } |
99 | for (; seg < eseg; seg++) { |
100 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
101 | off, seg->dma_map->dm_mapsize - off, op); |
102 | off = 0; |
103 | } |
104 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
105 | off, eoff - off + am->esize, op); |
106 | } |
107 | |
108 | static __inline void |
109 | fwdma_sync_multiseg_all(struct fwdma_alloc_multi *am, int op) |
110 | { |
111 | struct fwdma_seg *seg; |
112 | int i; |
113 | |
114 | seg = am->seg; |
115 | for (i = 0; i < am->nseg; i++, seg++) |
116 | bus_dmamap_sync(am->dma_tag, seg->dma_map, |
117 | 0, seg->dma_map->dm_mapsize, op); |
118 | } |
119 | |
120 | void *fwdma_malloc(device_t, bus_dma_tag_t, bus_dmamap_t *, bus_size_t, int, |
121 | int); |
122 | void fwdma_free(bus_dma_tag_t, bus_dmamap_t, void *); |
123 | void *fwdma_alloc_setup(device_t, bus_dma_tag_t, bus_size_t, |
124 | struct fwdma_alloc *, int, int); |
125 | struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *, |
126 | int, int, int, int); |
127 | void fwdma_free_multiseg(struct fwdma_alloc_multi *); |
128 | |
129 | #endif /* _FWDMA_H_ */ |
130 | |