/* * Copyright 2004-2009 Analog Devices Inc. * * Licensed under the GPL-2 or later. */ #ifndef _BLACKFIN_DMA_MAPPING_H #define _BLACKFIN_DMA_MAPPING_H #include <asm/cacheflush.h> struct scatterlist; void *dma_alloc_coherent(struct device *dev, size_t size, dma_addr_t *dma_handle, gfp_t gfp); void dma_free_coherent(struct device *dev, size_t size, void *vaddr, dma_addr_t dma_handle); /* * Now for the API extensions over the pci_ one */ #define dma_alloc_noncoherent(d, s, h, f) dma_alloc_coherent(d, s, h, f) #define dma_free_noncoherent(d, s, v, h) dma_free_coherent(d, s, v, h) #define dma_supported(d, m) (1) static inline int dma_set_mask(struct device *dev, u64 dma_mask) { if (!dev->dma_mask || !dma_supported(dev, dma_mask)) return -EIO; *dev->dma_mask = dma_mask; return 0; } static inline int dma_mapping_error(struct device *dev, dma_addr_t dma_addr) { return 0; } extern void __dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir); static inline void __dma_sync_inline(dma_addr_t addr, size_t size, enum dma_data_direction dir) { switch (dir) { case DMA_NONE: BUG(); case DMA_TO_DEVICE: /* writeback only */ flush_dcache_range(addr, addr + size); break; case DMA_FROM_DEVICE: /* invalidate only */ case DMA_BIDIRECTIONAL: /* flush and invalidate */ /* Blackfin has no dedicated invalidate (it includes a flush) */ invalidate_dcache_range(addr, addr + size); break; } } static inline void _dma_sync(dma_addr_t addr, size_t size, enum dma_data_direction dir) { if (__builtin_constant_p(dir)) __dma_sync_inline(addr, size, dir); else __dma_sync(addr, size, dir); } static inline dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size, enum dma_data_direction dir) { _dma_sync((dma_addr_t)ptr, size, dir); return (dma_addr_t) ptr; } static inline dma_addr_t dma_map_page(struct device *dev, struct page *page, unsigned long offset, size_t size, enum dma_data_direction dir) { return dma_map_single(dev, page_address(page) + offset, size, dir); } static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir) { BUG_ON(!valid_dma_direction(dir)); } static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_addr, size_t size, enum dma_data_direction dir) { dma_unmap_single(dev, dma_addr, size, dir); } extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir); static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg, int nhwentries, enum dma_data_direction dir) { BUG_ON(!valid_dma_direction(dir)); } static inline void dma_sync_single_range_for_cpu(struct device *dev, dma_addr_t handle, unsigned long offset, size_t size, enum dma_data_direction dir) { BUG_ON(!valid_dma_direction(dir)); } static inline void dma_sync_single_range_for_device(struct device *dev, dma_addr_t handle, unsigned long offset, size_t size, enum dma_data_direction dir) { _dma_sync(handle + offset, size, dir); } static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { dma_sync_single_range_for_cpu(dev, handle, 0, size, dir); } static inline void dma_sync_single_for_device(struct device *dev, dma_addr_t handle, size_t size, enum dma_data_direction dir) { dma_sync_single_range_for_device(dev, handle, 0, size, dir); } static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir) { BUG_ON(!valid_dma_direction(dir)); } extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir); static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size, enum dma_data_direction dir) { _dma_sync((dma_addr_t)vaddr, size, dir); } /* drivers/base/dma-mapping.c */ extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma, void *cpu_addr, dma_addr_t dma_addr, size_t size); extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr, size_t size); #define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s) #define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s) #endif /* _BLACKFIN_DMA_MAPPING_H */