tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1/*
2 * Copyright (C) 2006 Atmark Techno, Inc.
3 *
4 * This file is subject to the terms and conditions of the GNU General Public
5 * License. See the file "COPYING" in the main directory of this archive
6 * for more details.
7 */
8
9#ifndef _ASM_MICROBLAZE_DMA_MAPPING_H
10#define _ASM_MICROBLAZE_DMA_MAPPING_H
11
12#include <asm/cacheflush.h>
13#include <linux/io.h>
14#include <linux/bug.h>
15
16struct scatterlist;
17
18#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
19#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
20
21/* FIXME */
22static inline int
23dma_supported(struct device *dev, u64 mask)
24{
25 return 1;
26}
27
28static inline dma_addr_t
29dma_map_page(struct device *dev, struct page *page,
30 unsigned long offset, size_t size,
31 enum dma_data_direction direction)
32{
33 BUG();
34 return 0;
35}
36
37static inline void
38dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
39 enum dma_data_direction direction)
40{
41 BUG();
42}
43
44static inline int
45dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
46 enum dma_data_direction direction)
47{
48 BUG();
49 return 0;
50}
51
52static inline void
53dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
54 enum dma_data_direction direction)
55{
56 BUG();
57}
58
59static inline void
60dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
61 enum dma_data_direction direction)
62{
63 BUG();
64}
65
66static inline void
67dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle,
68 size_t size, enum dma_data_direction direction)
69{
70 BUG();
71}
72
73static inline void
74dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
75 enum dma_data_direction direction)
76{
77 BUG();
78}
79
80static inline void
81dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
82 enum dma_data_direction direction)
83{
84 BUG();
85}
86
87static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
88{
89 return 0;
90}
91
92static inline void *dma_alloc_coherent(struct device *dev, size_t size,
93 dma_addr_t *dma_handle, int flag)
94{
95 return NULL; /* consistent_alloc(flag, size, dma_handle); */
96}
97
98static inline void dma_free_coherent(struct device *dev, size_t size,
99 void *vaddr, dma_addr_t dma_handle)
100{
101 BUG();
102}
103
104static inline dma_addr_t
105dma_map_single(struct device *dev, void *ptr, size_t size,
106 enum dma_data_direction direction)
107{
108 BUG_ON(direction == DMA_NONE);
109
110 return virt_to_bus(ptr);
111}
112
113static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
114 size_t size,
115 enum dma_data_direction direction)
116{
117 switch (direction) {
118 case DMA_FROM_DEVICE:
119 flush_dcache_range((unsigned)dma_addr,
120 (unsigned)dma_addr + size);
121 /* Fall through */
122 case DMA_TO_DEVICE:
123 break;
124 default:
125 BUG();
126 }
127}
128
129#endif /* _ASM_MICROBLAZE_DMA_MAPPING_H */