797a756865
This patch converts dma_map_single and dma_unmap_single to use map_page and unmap_page respectively and removes unnecessary map_single and unmap_single. map_page can be used to implement map_single but the opposite is impossible. Having only dma_map_page in struct dma_ops is enough. Signed-off-by: FUJITA Tomonori <fujita.tomonori@lab.ntt.co.jp> Tested-by: Robert Reif <reif@earthlink.net> Signed-off-by: David S. Miller <davem@davemloft.net>
122 lines
3.9 KiB
C
122 lines
3.9 KiB
C
#ifndef _ASM_SPARC64_DMA_MAPPING_H
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#define _ASM_SPARC64_DMA_MAPPING_H
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#include <linux/scatterlist.h>
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#include <linux/mm.h>
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struct dma_ops {
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void *(*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 (*free_coherent)(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle);
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dma_addr_t (*map_page)(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction direction);
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void (*unmap_page)(struct device *dev, dma_addr_t dma_addr,
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size_t size,
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enum dma_data_direction direction);
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int (*map_sg)(struct device *dev, struct scatterlist *sg, int nents,
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enum dma_data_direction direction);
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void (*unmap_sg)(struct device *dev, struct scatterlist *sg,
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int nhwentries,
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enum dma_data_direction direction);
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void (*sync_single_for_cpu)(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction);
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void (*sync_single_for_device)(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction);
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void (*sync_sg_for_cpu)(struct device *dev, struct scatterlist *sg,
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int nelems,
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enum dma_data_direction direction);
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void (*sync_sg_for_device)(struct device *dev,
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struct scatterlist *sg, int nents,
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enum dma_data_direction dir);
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};
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extern const struct dma_ops *dma_ops;
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static inline 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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{
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return dma_ops->alloc_coherent(dev, size, dma_handle, flag);
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}
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static inline void dma_free_coherent(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle)
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{
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dma_ops->free_coherent(dev, size, cpu_addr, dma_handle);
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}
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static inline dma_addr_t dma_map_single(struct device *dev, void *cpu_addr,
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size_t size,
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enum dma_data_direction direction)
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{
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return dma_ops->map_page(dev, virt_to_page(cpu_addr),
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(unsigned long)cpu_addr & ~PAGE_MASK, size,
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direction);
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}
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static inline void dma_unmap_single(struct device *dev, dma_addr_t dma_addr,
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size_t size,
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enum dma_data_direction direction)
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{
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dma_ops->unmap_page(dev, dma_addr, size, direction);
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}
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static inline dma_addr_t dma_map_page(struct device *dev, struct page *page,
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unsigned long offset, size_t size,
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enum dma_data_direction direction)
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{
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return dma_ops->map_page(dev, page, offset, size, direction);
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}
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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,
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enum dma_data_direction direction)
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{
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dma_ops->unmap_page(dev, dma_address, size, direction);
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}
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static inline int dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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return dma_ops->map_sg(dev, sg, nents, direction);
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}
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static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction direction)
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{
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dma_ops->unmap_sg(dev, sg, nents, direction);
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}
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static inline void dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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enum dma_data_direction direction)
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{
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dma_ops->sync_single_for_cpu(dev, dma_handle, size, direction);
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}
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static inline void dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size,
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enum dma_data_direction direction)
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{
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/* No flushing needed to sync cpu writes to the device. */
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}
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static inline void dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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dma_ops->sync_sg_for_cpu(dev, sg, nelems, direction);
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}
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static inline void dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg, int nelems,
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enum dma_data_direction direction)
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{
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/* No flushing needed to sync cpu writes to the device. */
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}
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#endif /* _ASM_SPARC64_DMA_MAPPING_H */
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