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Mikael Starvik59c61132005-07-27 11:44:40 -07001/* DMA mapping. Nothing tricky here, just virt_to_phys */
2
Linus Torvalds1da177e2005-04-16 15:20:36 -07003#ifndef _ASM_CRIS_DMA_MAPPING_H
4#define _ASM_CRIS_DMA_MAPPING_H
5
Mikael Starvik59c61132005-07-27 11:44:40 -07006#include <linux/mm.h>
7#include <linux/kernel.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -07008
Mikael Starvik59c61132005-07-27 11:44:40 -07009#include <asm/cache.h>
10#include <asm/io.h>
11#include <asm/scatterlist.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070012
Mikael Starvik59c61132005-07-27 11:44:40 -070013#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
14#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
Linus Torvalds1da177e2005-04-16 15:20:36 -070015
Mikael Starvik59c61132005-07-27 11:44:40 -070016#ifdef CONFIG_PCI
17void *dma_alloc_coherent(struct device *dev, size_t size,
Al Viro43b7eae2005-10-21 03:21:13 -040018 dma_addr_t *dma_handle, gfp_t flag);
Mikael Starvik59c61132005-07-27 11:44:40 -070019
20void dma_free_coherent(struct device *dev, size_t size,
21 void *vaddr, dma_addr_t dma_handle);
22#else
Linus Torvalds1da177e2005-04-16 15:20:36 -070023static inline void *
24dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle,
Al Viro43b7eae2005-10-21 03:21:13 -040025 gfp_t flag)
Linus Torvalds1da177e2005-04-16 15:20:36 -070026{
Mikael Starvik59c61132005-07-27 11:44:40 -070027 BUG();
28 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -070029}
30
31static inline void
32dma_free_coherent(struct device *dev, size_t size, void *cpu_addr,
Mikael Starvik59c61132005-07-27 11:44:40 -070033 dma_addr_t dma_handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -070034{
Mikael Starvik59c61132005-07-27 11:44:40 -070035 BUG();
Linus Torvalds1da177e2005-04-16 15:20:36 -070036}
Mikael Starvik59c61132005-07-27 11:44:40 -070037#endif
Linus Torvalds1da177e2005-04-16 15:20:36 -070038static inline dma_addr_t
Mikael Starvik59c61132005-07-27 11:44:40 -070039dma_map_single(struct device *dev, void *ptr, size_t size,
Linus Torvalds1da177e2005-04-16 15:20:36 -070040 enum dma_data_direction direction)
41{
Mikael Starvik59c61132005-07-27 11:44:40 -070042 BUG_ON(direction == DMA_NONE);
43 return virt_to_phys(ptr);
Linus Torvalds1da177e2005-04-16 15:20:36 -070044}
45
46static inline void
47dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size,
48 enum dma_data_direction direction)
49{
Mikael Starvik59c61132005-07-27 11:44:40 -070050 BUG_ON(direction == DMA_NONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070051}
52
53static inline int
54dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
55 enum dma_data_direction direction)
56{
Mikael Starvik59c61132005-07-27 11:44:40 -070057 printk("Map sg\n");
58 return nents;
Linus Torvalds1da177e2005-04-16 15:20:36 -070059}
60
Mikael Starvik59c61132005-07-27 11:44:40 -070061static inline dma_addr_t
62dma_map_page(struct device *dev, struct page *page, unsigned long offset,
63 size_t size, enum dma_data_direction direction)
64{
65 BUG_ON(direction == DMA_NONE);
66 return page_to_phys(page) + offset;
67}
68
69static inline void
70dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size,
71 enum dma_data_direction direction)
72{
73 BUG_ON(direction == DMA_NONE);
74}
75
76
Linus Torvalds1da177e2005-04-16 15:20:36 -070077static inline void
78dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries,
79 enum dma_data_direction direction)
80{
Mikael Starvik59c61132005-07-27 11:44:40 -070081 BUG_ON(direction == DMA_NONE);
Linus Torvalds1da177e2005-04-16 15:20:36 -070082}
83
84static inline void
Mikael Starvik59c61132005-07-27 11:44:40 -070085dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size,
86 enum dma_data_direction direction)
Linus Torvalds1da177e2005-04-16 15:20:36 -070087{
Linus Torvalds1da177e2005-04-16 15:20:36 -070088}
89
90static inline void
Mikael Starvik59c61132005-07-27 11:44:40 -070091dma_sync_single_for_device(struct device *dev, dma_addr_t dma_handle, size_t size,
92 enum dma_data_direction direction)
Linus Torvalds1da177e2005-04-16 15:20:36 -070093{
Linus Torvalds1da177e2005-04-16 15:20:36 -070094}
95
Mikael Starvik59c61132005-07-27 11:44:40 -070096static inline void
97dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle,
98 unsigned long offset, size_t size,
99 enum dma_data_direction direction)
100{
101}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700102
Mikael Starvik59c61132005-07-27 11:44:40 -0700103static inline void
104dma_sync_single_range_for_device(struct device *dev, dma_addr_t dma_handle,
105 unsigned long offset, size_t size,
106 enum dma_data_direction direction)
107{
108}
109
110static inline void
111dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems,
112 enum dma_data_direction direction)
113{
114}
115
116static inline void
117dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nelems,
118 enum dma_data_direction direction)
119{
120}
121
122static inline int
123dma_mapping_error(dma_addr_t dma_addr)
124{
125 return 0;
126}
127
128static inline int
129dma_supported(struct device *dev, u64 mask)
130{
131 /*
132 * we fall back to GFP_DMA when the mask isn't all 1s,
133 * so we can't guarantee allocations that must be
134 * within a tighter range than GFP_DMA..
135 */
136 if(mask < 0x00ffffff)
137 return 0;
138
139 return 1;
140}
141
142static inline int
143dma_set_mask(struct device *dev, u64 mask)
144{
145 if(!dev->dma_mask || !dma_supported(dev, mask))
146 return -EIO;
147
148 *dev->dma_mask = mask;
149
150 return 0;
151}
Linus Torvalds1da177e2005-04-16 15:20:36 -0700152
153static inline int
154dma_get_cache_alignment(void)
155{
Ravikiran G Thirumalai1fd73c62006-01-08 01:01:28 -0800156 return (1 << INTERNODE_CACHE_SHIFT);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700157}
158
Ralf Baechlef67637e2006-12-06 20:38:54 -0800159#define dma_is_consistent(d, h) (1)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700160
161static inline void
Ralf Baechled3fa72e2006-12-06 20:38:56 -0800162dma_cache_sync(struct device *dev, void *vaddr, size_t size,
Linus Torvalds1da177e2005-04-16 15:20:36 -0700163 enum dma_data_direction direction)
164{
Linus Torvalds1da177e2005-04-16 15:20:36 -0700165}
166
Mikael Starvik59c61132005-07-27 11:44:40 -0700167
168#endif