tjh.dev
Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
1#ifndef _ASM_DMA_MAPPING_H
2#define _ASM_DMA_MAPPING_H
3
4#include <asm/scatterlist.h>
5#include <asm/cache.h>
6
7void *dma_alloc_noncoherent(struct device *dev, size_t size,
8 dma_addr_t *dma_handle, gfp_t flag);
9
10void dma_free_noncoherent(struct device *dev, size_t size,
11 void *vaddr, dma_addr_t dma_handle);
12
13void *dma_alloc_coherent(struct device *dev, size_t size,
14 dma_addr_t *dma_handle, gfp_t flag);
15
16void dma_free_coherent(struct device *dev, size_t size,
17 void *vaddr, dma_addr_t dma_handle);
18
19extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
20 enum dma_data_direction direction);
21extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
22 size_t size, enum dma_data_direction direction);
23extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
24 enum dma_data_direction direction);
25extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
26 unsigned long offset, size_t size, enum dma_data_direction direction);
27extern void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
28 size_t size, enum dma_data_direction direction);
29extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
30 int nhwentries, enum dma_data_direction direction);
31extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
32 size_t size, enum dma_data_direction direction);
33extern void dma_sync_single_for_device(struct device *dev,
34 dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
35extern void dma_sync_single_range_for_cpu(struct device *dev,
36 dma_addr_t dma_handle, unsigned long offset, size_t size,
37 enum dma_data_direction direction);
38extern void dma_sync_single_range_for_device(struct device *dev,
39 dma_addr_t dma_handle, unsigned long offset, size_t size,
40 enum dma_data_direction direction);
41extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
42 int nelems, enum dma_data_direction direction);
43extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
44 int nelems, enum dma_data_direction direction);
45extern int dma_mapping_error(dma_addr_t dma_addr);
46extern int dma_supported(struct device *dev, u64 mask);
47
48static inline int
49dma_set_mask(struct device *dev, u64 mask)
50{
51 if(!dev->dma_mask || !dma_supported(dev, mask))
52 return -EIO;
53
54 *dev->dma_mask = mask;
55
56 return 0;
57}
58
59static inline int
60dma_get_cache_alignment(void)
61{
62 /* XXX Largest on any MIPS */
63 return 128;
64}
65
66extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
67
68extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
69 enum dma_data_direction direction);
70
71#if 0
72#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
73
74extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
75 dma_addr_t device_addr, size_t size, int flags);
76extern void dma_release_declared_memory(struct device *dev);
77extern void * dma_mark_declared_memory_occupied(struct device *dev,
78 dma_addr_t device_addr, size_t size);
79#endif
80
81#endif /* _ASM_DMA_MAPPING_H */