1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (C) 2003
5 * Hidetoshi Shimokawa. All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 * notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 * notice, this list of conditions and the following disclaimer in the
14 * documentation and/or other materials provided with the distribution.
15 * 3. All advertising materials mentioning features or use of this software
16 * must display the following acknowledgement:
17 *
18 * This product includes software developed by Hidetoshi Shimokawa.
19 *
20 * 4. Neither the name of the author nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37 struct 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
44 struct fwdma_seg {
45 bus_dmamap_t dma_map;
46 void *v_addr;
47 bus_addr_t bus_addr;
48 };
49
50 struct 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
58 static __inline void *
fwdma_v_addr(struct fwdma_alloc_multi * am,int index)59 fwdma_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
67 static __inline bus_addr_t
fwdma_bus_addr(struct fwdma_alloc_multi * am,int index)68 fwdma_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
76 static __inline void
fwdma_sync(struct fwdma_alloc * dma,bus_dmasync_op_t op)77 fwdma_sync(struct fwdma_alloc *dma, bus_dmasync_op_t op)
78 {
79 bus_dmamap_sync(dma->dma_tag, dma->dma_map, op);
80 }
81
82 static __inline void
fwdma_sync_multiseg(struct fwdma_alloc_multi * am,int start,int end,bus_dmasync_op_t op)83 fwdma_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
94 static __inline void
fwdma_sync_multiseg_all(struct fwdma_alloc_multi * am,bus_dmasync_op_t op)95 fwdma_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
105 void *fwdma_malloc(struct firewire_comm *, int, bus_size_t, struct fwdma_alloc *, int);
106 void fwdma_free(struct firewire_comm *, struct fwdma_alloc *);
107 void *fwdma_malloc_size(bus_dma_tag_t, bus_dmamap_t *, bus_size_t, bus_addr_t *, int);
108 void fwdma_free_size(bus_dma_tag_t, bus_dmamap_t, void *, bus_size_t);
109 struct fwdma_alloc_multi *fwdma_malloc_multiseg(struct firewire_comm *,
110 int, int, int, int);
111 void fwdma_free_multiseg(struct fwdma_alloc_multi *);
112
113