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 debug_dma_mapping_error(dev, dma_addr); 50 if (ops->mapping_error) 51 return ops->mapping_error(dev, dma_addr); 52 53 return dma_addr == 0; 54} 55 56#define dma_alloc_coherent(d,s,h,f) dma_alloc_attrs(d,s,h,f,NULL) 57 58static inline void *dma_alloc_attrs(struct device *dev, size_t size, 59 dma_addr_t *dma_handle, gfp_t gfp, 60 struct dma_attrs *attrs) 61{ 62 struct dma_map_ops *ops = get_dma_ops(dev); 63 void *memory; 64 65 if (dma_alloc_from_coherent(dev, size, dma_handle, &memory)) 66 return memory; 67 if (!ops->alloc) 68 return NULL; 69 70 memory = ops->alloc(dev, size, dma_handle, gfp, attrs); 71 debug_dma_alloc_coherent(dev, size, *dma_handle, memory); 72 73 return memory; 74} 75 76#define dma_free_coherent(d,s,c,h) dma_free_attrs(d,s,c,h,NULL) 77 78static inline void dma_free_attrs(struct device *dev, size_t size, 79 void *vaddr, dma_addr_t dma_handle, 80 struct dma_attrs *attrs) 81{ 82 struct dma_map_ops *ops = get_dma_ops(dev); 83 84 if (dma_release_from_coherent(dev, get_order(size), vaddr)) 85 return; 86 87 debug_dma_free_coherent(dev, size, vaddr, dma_handle); 88 if (ops->free) 89 ops->free(dev, size, vaddr, dma_handle, attrs); 90} 91 92/* arch/sh/mm/consistent.c */ 93extern void *dma_generic_alloc_coherent(struct device *dev, size_t size, 94 dma_addr_t *dma_addr, gfp_t flag, 95 struct dma_attrs *attrs); 96extern void dma_generic_free_coherent(struct device *dev, size_t size, 97 void *vaddr, dma_addr_t dma_handle, 98 struct dma_attrs *attrs); 99 100#endif /* __ASM_SH_DMA_MAPPING_H */ 101