1#ifndef __ASM_SH_DMA_MAPPING_H 2#define __ASM_SH_DMA_MAPPING_H 3 4extern struct dma_map_ops *dma_ops; 5extern void no_iommu_init(void); 6 7static 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 15static 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 25static 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 39void 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 45static 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 55static 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 72static 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 */ 86extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, 87 dma_addr_t *dma_addr, gfp_t flag); 88extern 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