1/* 2 * Copyright 2004-2009 Analog Devices Inc. 3 * 4 * Licensed under the GPL-2 or later. 5 */ 6 7#ifndef _BLACKFIN_DMA_MAPPING_H 8#define _BLACKFIN_DMA_MAPPING_H 9 10#include <asm/cacheflush.h> 11struct scatterlist; 12 13void *dma_alloc_coherent(struct device *dev, size_t size, 14 dma_addr_t *dma_handle, gfp_t gfp); 15void dma_free_coherent(struct device *dev, size_t size, void *vaddr, 16 dma_addr_t dma_handle); 17 18/* 19 * Now for the API extensions over the pci_ one 20 */ 21#define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) 22#define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) 23#define dma_supported(d, m) (1) 24 25static inline int 26dma_set_mask(struct device *dev, u64 dma_mask) 27{ 28 if (!dev->dma_mask || !dma_supported(dev, dma_mask)) 29 return -EIO; 30 31 *dev->dma_mask = dma_mask; 32 33 return 0; 34} 35 36static inline int 37dma_mapping_error(struct device *dev, dma_addr_t dma_addr) 38{ 39 return 0; 40} 41 42extern void 43__dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir); 44static inline void 45__dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir) 46{ 47 switch (dir) { 48 case DMA_NONE: 49 BUG(); 50 case DMA_TO_DEVICE: /* writeback only */ 51 flush_dcache_range(addr, addr + size); 52 break; 53 case DMA_FROM_DEVICE: /* invalidate only */ 54 case DMA_BIDIRECTIONAL: /* flush and invalidate */ 55 /* Blackfin has no dedicated invalidate (it includes a flush) */ 56 invalidate_dcache_range(addr, addr + size); 57 break; 58 } 59} 60static inline void 61_dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) 62{ 63 if (__builtin_constant_p(dir)) 64 __dma_sync_inline(addr, size, dir); 65 else 66 __dma_sync(addr, size, dir); 67} 68 69static inline dma_addr_t 70dma_map_single(struct device *dev, void *ptr, size_t size, 71 enum dma_data_direction dir) 72{ 73 _dma_sync((dma_addr_t)ptr, size, dir); 74 return (dma_addr_t) ptr; 75} 76 77static inline dma_addr_t 78dma_map_page(struct device *dev, struct page *page, 79 unsigned long offset, size_t size, 80 enum dma_data_direction dir) 81{ 82 return dma_map_single(dev, page_address(page) + offset, size, dir); 83} 84 85static inline void 86dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, 87 enum dma_data_direction dir) 88{ 89 BUG_ON(!valid_dma_direction(dir)); 90} 91 92static inline void 93dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, 94 enum dma_data_direction dir) 95{ 96 dma_unmap_single(dev, dma_addr, size, dir); 97} 98 99extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, 100 enum dma_data_direction dir); 101 102static inline void 103dma_unmap_sg(struct device *dev, struct scatterlist *sg, 104 int nhwentries, enum dma_data_direction dir) 105{ 106 BUG_ON(!valid_dma_direction(dir)); 107} 108 109static inline void 110dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle, 111 unsigned long offset, size_t size, 112 enum dma_data_direction dir) 113{ 114 BUG_ON(!valid_dma_direction(dir)); 115} 116 117static inline void 118dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle, 119 unsigned long offset, size_t size, 120 enum dma_data_direction dir) 121{ 122 _dma_sync(handle + offset, size, dir); 123} 124 125static inline void 126dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, 127 enum dma_data_direction dir) 128{ 129 dma_sync_single_range_for_cpu(dev, handle, 0, size, dir); 130} 131 132static inline void 133dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, 134 enum dma_data_direction dir) 135{ 136 dma_sync_single_range_for_device(dev, handle, 0, size, dir); 137} 138 139static inline void 140dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, 141 enum dma_data_direction dir) 142{ 143 BUG_ON(!valid_dma_direction(dir)); 144} 145 146extern void 147dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, 148 int nents, enum dma_data_direction dir); 149 150static inline void 151dma_cache_sync(struct device *dev, void *vaddr, size_t size, 152 enum dma_data_direction dir) 153{ 154 _dma_sync((dma_addr_t)vaddr, size, dir); 155} 156 157#endif /* _BLACKFIN_DMA_MAPPING_H */ 158