| lh | 9ed821d | 2023-04-07 01:36:19 -0700 | [diff] [blame] | 1 | #ifndef _ASM_GENERIC_DMA_MAPPING_H |
| 2 | #define _ASM_GENERIC_DMA_MAPPING_H |
| 3 | |
| 4 | /* define the dma api to allow compilation but not linking of |
| 5 | * dma dependent code. Code that depends on the dma-mapping |
| 6 | * API needs to set 'depends on HAS_DMA' in its Kconfig |
| 7 | */ |
| 8 | |
| 9 | struct scatterlist; |
| 10 | |
| 11 | extern void * |
| 12 | dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, |
| 13 | gfp_t flag); |
| 14 | |
| 15 | extern void |
| 16 | dma_free_coherent(struct device *dev, size_t size, void *cpu_addr, |
| 17 | dma_addr_t dma_handle); |
| 18 | |
| 19 | #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) |
| 20 | #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) |
| 21 | |
| 22 | extern dma_addr_t |
| 23 | dma_map_single(struct device *dev, void *ptr, size_t size, |
| 24 | enum dma_data_direction direction); |
| 25 | |
| 26 | extern void |
| 27 | dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, |
| 28 | enum dma_data_direction direction); |
| 29 | |
| 30 | extern int |
| 31 | dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, |
| 32 | enum dma_data_direction direction); |
| 33 | |
| 34 | extern void |
| 35 | dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, |
| 36 | enum dma_data_direction direction); |
| 37 | |
| 38 | extern dma_addr_t |
| 39 | dma_map_page(struct device *dev, struct page *page, unsigned long offset, |
| 40 | size_t size, enum dma_data_direction direction); |
| 41 | |
| 42 | extern void |
| 43 | dma_unmap_page(struct device *dev, dma_addr_t dma_address, size_t size, |
| 44 | enum dma_data_direction direction); |
| 45 | |
| 46 | extern void |
| 47 | dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle, size_t size, |
| 48 | enum dma_data_direction direction); |
| 49 | |
| 50 | extern void |
| 51 | dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t dma_handle, |
| 52 | unsigned long offset, size_t size, |
| 53 | enum dma_data_direction direction); |
| 54 | |
| 55 | extern void |
| 56 | dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nelems, |
| 57 | enum dma_data_direction direction); |
| 58 | |
| 59 | #define dma_sync_single_for_device dma_sync_single_for_cpu |
| 60 | #define dma_sync_single_range_for_device dma_sync_single_range_for_cpu |
| 61 | #define dma_sync_sg_for_device dma_sync_sg_for_cpu |
| 62 | |
| 63 | extern int |
| 64 | dma_mapping_error(struct device *dev, dma_addr_t dma_addr); |
| 65 | |
| 66 | extern int |
| 67 | dma_supported(struct device *dev, u64 mask); |
| 68 | |
| 69 | extern int |
| 70 | dma_set_mask(struct device *dev, u64 mask); |
| 71 | |
| 72 | extern int |
| 73 | dma_get_cache_alignment(void); |
| 74 | |
| 75 | extern void |
| 76 | dma_cache_sync(struct device *dev, void *vaddr, size_t size, |
| 77 | enum dma_data_direction direction); |
| 78 | |
| 79 | #endif /* _ASM_GENERIC_DMA_MAPPING_H */ |