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4f29c057aa
Synchronize dma_map_page/dma_unmap_page and dma_map_single/dma_unmap_single. This will reduce unnecessary writebacks and invalidates. [Ralf: make dma_unmap_page an inline function.] Signed-off-by: Atsushi Nemoto <anemo@mba.ocn.ne.jp> Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
87 lines
3.0 KiB
C
87 lines
3.0 KiB
C
#ifndef _ASM_DMA_MAPPING_H
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#define _ASM_DMA_MAPPING_H
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#include <asm/scatterlist.h>
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#include <asm/cache.h>
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void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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void dma_free_noncoherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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void *dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag);
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void dma_free_coherent(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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extern dma_addr_t dma_map_single(struct device *dev, void *ptr, size_t size,
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enum dma_data_direction direction);
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extern void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
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size_t size, enum dma_data_direction direction);
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extern int dma_map_sg(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction);
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extern dma_addr_t dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size, enum dma_data_direction direction);
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static inline void dma_unmap_page(struct device *dev, dma_addr_t dma_address,
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size_t size, enum dma_data_direction direction)
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{
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dma_unmap_single(dev, dma_address, size, direction);
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}
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extern void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nhwentries, enum dma_data_direction direction);
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extern void dma_sync_single_for_cpu(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction direction);
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extern void dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle, size_t size, enum dma_data_direction direction);
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extern void dma_sync_single_range_for_cpu(struct device *dev,
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dma_addr_t dma_handle, unsigned long offset, size_t size,
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enum dma_data_direction direction);
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extern void dma_sync_single_range_for_device(struct device *dev,
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dma_addr_t dma_handle, unsigned long offset, size_t size,
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enum dma_data_direction direction);
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extern void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction direction);
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extern void dma_sync_sg_for_device(struct device *dev, struct scatterlist *sg,
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int nelems, enum dma_data_direction direction);
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extern int dma_mapping_error(struct device *dev, dma_addr_t dma_addr);
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extern int dma_supported(struct device *dev, u64 mask);
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static inline int
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dma_set_mask(struct device *dev, u64 mask)
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{
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if(!dev->dma_mask || !dma_supported(dev, mask))
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return -EIO;
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*dev->dma_mask = mask;
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return 0;
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}
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static inline int
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dma_get_cache_alignment(void)
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{
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/* XXX Largest on any MIPS */
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return 128;
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}
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extern int dma_is_consistent(struct device *dev, dma_addr_t dma_addr);
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extern void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction direction);
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#if 0
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#define ARCH_HAS_DMA_DECLARE_COHERENT_MEMORY
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extern int dma_declare_coherent_memory(struct device *dev, dma_addr_t bus_addr,
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dma_addr_t device_addr, size_t size, int flags);
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extern void dma_release_declared_memory(struct device *dev);
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extern void * dma_mark_declared_memory_occupied(struct device *dev,
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dma_addr_t device_addr, size_t size);
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#endif
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#endif /* _ASM_DMA_MAPPING_H */
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