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1#ifndef _M68K_DMA_MAPPING_H
2#define _M68K_DMA_MAPPING_H
3
4#include <asm/cache.h>
5
6struct scatterlist;
7
8static inline int dma_supported(struct device *dev, u64 mask)
9{
10 return 1;
11}
12
13static inline int dma_set_mask(struct device *dev, u64 mask)
14{
15 return 0;
16}
17
18extern void *dma_alloc_coherent(struct device *, size_t,
19 dma_addr_t *, gfp_t);
20extern void dma_free_coherent(struct device *, size_t,
21 void *, dma_addr_t);
22
23static inline void *dma_alloc_attrs(struct device *dev, size_t size,
24 dma_addr_t *dma_handle, gfp_t flag,
25 struct dma_attrs *attrs)
26{
27 /* attrs is not supported and ignored */
28 return dma_alloc_coherent(dev, size, dma_handle, flag);
29}
30
31static inline void dma_free_attrs(struct device *dev, size_t size,
32 void *cpu_addr, dma_addr_t dma_handle,
33 struct dma_attrs *attrs)
34{
35 /* attrs is not supported and ignored */
36 dma_free_coherent(dev, size, cpu_addr, dma_handle);
37}
38
39static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
40 dma_addr_t *handle, gfp_t flag)
41{
42 return dma_alloc_coherent(dev, size, handle, flag);
43}
44static inline void dma_free_noncoherent(struct device *dev, size_t size,
45 void *addr, dma_addr_t handle)
46{
47 dma_free_coherent(dev, size, addr, handle);
48}
49static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
50 enum dma_data_direction dir)
51{
52 /* we use coherent allocation, so not much to do here. */
53}
54
55extern dma_addr_t dma_map_single(struct device *, void *, size_t,
56 enum dma_data_direction);
57static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
58 size_t size, enum dma_data_direction dir)
59{
60}
61
62extern dma_addr_t dma_map_page(struct device *, struct page *,
63 unsigned long, size_t size,
64 enum dma_data_direction);
65static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
66 size_t size, enum dma_data_direction dir)
67{
68}
69
70extern int dma_map_sg(struct device *, struct scatterlist *, int,
71 enum dma_data_direction);
72static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
73 int nhwentries, enum dma_data_direction dir)
74{
75}
76
77extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
78 enum dma_data_direction);
79extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
80 enum dma_data_direction);
81
82static inline void dma_sync_single_range_for_device(struct device *dev,
83 dma_addr_t dma_handle, unsigned long offset, size_t size,
84 enum dma_data_direction direction)
85{
86 /* just sync everything for now */
87 dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
88}
89
90static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
91 size_t size, enum dma_data_direction dir)
92{
93}
94
95static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
96 int nents, enum dma_data_direction dir)
97{
98}
99
100static inline void dma_sync_single_range_for_cpu(struct device *dev,
101 dma_addr_t dma_handle, unsigned long offset, size_t size,
102 enum dma_data_direction direction)
103{
104 /* just sync everything for now */
105 dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
106}
107
108static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
109{
110 return 0;
111}
112
113/* drivers/base/dma-mapping.c */
114extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
115 void *cpu_addr, dma_addr_t dma_addr, size_t size);
116extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
117 void *cpu_addr, dma_addr_t dma_addr,
118 size_t size);
119
120#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
121#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
122
123#endif /* _M68K_DMA_MAPPING_H */