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21#ifndef _ASM_DMA_MAPPING_H
22#define _ASM_DMA_MAPPING_H
23
24#include <linux/types.h>
25#include <linux/cache.h>
26#include <linux/mm.h>
27#include <linux/scatterlist.h>
28#include <linux/dma-mapping.h>
29#include <linux/dma-debug.h>
30#include <linux/dma-attrs.h>
31#include <asm/io.h>
32
33struct device;
34extern int bad_dma_address;
35
36extern struct dma_map_ops *dma_ops;
37
38#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
39#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
40
41static inline struct dma_map_ops *get_dma_ops(struct device *dev)
42{
43 if (unlikely(dev == NULL))
44 return NULL;
45
46 return dma_ops;
47}
48
49extern int dma_supported(struct device *dev, u64 mask);
50extern int dma_set_mask(struct device *dev, u64 mask);
51extern int dma_is_consistent(struct device *dev, dma_addr_t dma_handle);
52extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
53 enum dma_data_direction direction);
54
55#include <asm-generic/dma-mapping-common.h>
56
57static inline bool dma_capable(struct device *dev, dma_addr_t addr, size_t size)
58{
59 if (!dev->dma_mask)
60 return 0;
61 return addr + size - 1 <= *dev->dma_mask;
62}
63
64static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
65{
66 struct dma_map_ops *dma_ops = get_dma_ops(dev);
67
68 if (dma_ops->mapping_error)
69 return dma_ops->mapping_error(dev, dma_addr);
70
71 return (dma_addr == bad_dma_address);
72}
73
74#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL)
75
76static inline void *dma_alloc_attrs(struct device *dev, size_t size,
77 dma_addr_t *dma_handle, gfp_t flag,
78 struct dma_attrs *attrs)
79{
80 void *ret;
81 struct dma_map_ops *ops = get_dma_ops(dev);
82
83 BUG_ON(!dma_ops);
84
85 ret = ops->alloc(dev, size, dma_handle, flag, attrs);
86
87 debug_dma_alloc_coherent(dev, size, *dma_handle, ret);
88
89 return ret;
90}
91
92#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL)
93
94static inline void dma_free_attrs(struct device *dev, size_t size,
95 void *cpu_addr, dma_addr_t dma_handle,
96 struct dma_attrs *attrs)
97{
98 struct dma_map_ops *dma_ops = get_dma_ops(dev);
99
100 BUG_ON(!dma_ops);
101
102 dma_ops->free(dev, size, cpu_addr, dma_handle, attrs);
103
104 debug_dma_free_coherent(dev, size, cpu_addr, dma_handle);
105}
106
107#endif
108