1 #ifndef __ASM_SH_DMA_MAPPING_H
2 #define __ASM_SH_DMA_MAPPING_H
3
4 extern struct dma_map_ops *dma_ops;
5 extern void no_iommu_init(void);
6
get_dma_ops(struct device * dev)7 static inline struct dma_map_ops *get_dma_ops(struct device *dev)
8 {
9 return dma_ops;
10 }
11
12 #include <asm-generic/dma-coherent.h>
13 #include <asm-generic/dma-mapping-common.h>
14
dma_supported(struct device * dev,u64 mask)15 static inline int dma_supported(struct device *dev, u64 mask)
16 {
17 struct dma_map_ops *ops = get_dma_ops(dev);
18
19 if (ops->dma_supported)
20 return ops->dma_supported(dev, mask);
21
22 return 1;
23 }
24
dma_set_mask(struct device * dev,u64 mask)25 static inline int dma_set_mask(struct device *dev, u64 mask)
26 {
27 struct dma_map_ops *ops = get_dma_ops(dev);
28
29 if (!dev->dma_mask || !dma_supported(dev, mask))
30 return -EIO;
31 if (ops->set_dma_mask)
32 return ops->set_dma_mask(dev, mask);
33
34 *dev->dma_mask = mask;
35
36 return 0;
37 }
38
39 void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
40 enum dma_data_direction dir);
41
42 #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f)
43 #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h)
44
dma_mapping_error(struct device * dev,dma_addr_t dma_addr)45 static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr)
46 {
47 struct dma_map_ops *ops = get_dma_ops(dev);
48
49 if (ops->mapping_error)
50 return ops->mapping_error(dev, dma_addr);
51
52 return dma_addr == 0;
53 }
54
dma_alloc_coherent(struct device * dev,size_t size,dma_addr_t * dma_handle,gfp_t gfp)55 static inline void *dma_alloc_coherent(struct device *dev, size_t size,
56 dma_addr_t *dma_handle, gfp_t gfp)
57 {
58 struct dma_map_ops *ops = get_dma_ops(dev);
59 void *memory;
60
61 if (dma_alloc_from_coherent(dev, size, dma_handle, &memory))
62 return memory;
63 if (!ops->alloc_coherent)
64 return NULL;
65
66 memory = ops->alloc_coherent(dev, size, dma_handle, gfp);
67 debug_dma_alloc_coherent(dev, size, *dma_handle, memory);
68
69 return memory;
70 }
71
dma_free_coherent(struct device * dev,size_t size,void * vaddr,dma_addr_t dma_handle)72 static inline void dma_free_coherent(struct device *dev, size_t size,
73 void *vaddr, dma_addr_t dma_handle)
74 {
75 struct dma_map_ops *ops = get_dma_ops(dev);
76
77 if (dma_release_from_coherent(dev, get_order(size), vaddr))
78 return;
79
80 debug_dma_free_coherent(dev, size, vaddr, dma_handle);
81 if (ops->free_coherent)
82 ops->free_coherent(dev, size, vaddr, dma_handle);
83 }
84
85 /* arch/sh/mm/consistent.c */
86 extern void *dma_generic_alloc_coherent(struct device *dev, size_t size,
87 dma_addr_t *dma_addr, gfp_t flag);
88 extern void dma_generic_free_coherent(struct device *dev, size_t size,
89 void *vaddr, dma_addr_t dma_handle);
90
91 #endif /* __ASM_SH_DMA_MAPPING_H */
92