mirror of https://gitee.com/openkylin/linux.git
124 lines
3.7 KiB
C
124 lines
3.7 KiB
C
#ifndef _M68K_DMA_MAPPING_H
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#define _M68K_DMA_MAPPING_H
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#include <asm/cache.h>
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struct scatterlist;
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static inline int dma_supported(struct device *dev, u64 mask)
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{
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return 1;
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}
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static inline int dma_set_mask(struct device *dev, u64 mask)
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{
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return 0;
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}
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extern void *dma_alloc_coherent(struct device *, size_t,
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dma_addr_t *, gfp_t);
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extern void dma_free_coherent(struct device *, size_t,
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void *, dma_addr_t);
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static inline void *dma_alloc_attrs(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t flag,
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struct dma_attrs *attrs)
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{
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/* attrs is not supported and ignored */
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return dma_alloc_coherent(dev, size, dma_handle, flag);
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}
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static inline void dma_free_attrs(struct device *dev, size_t size,
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void *cpu_addr, dma_addr_t dma_handle,
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struct dma_attrs *attrs)
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{
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/* attrs is not supported and ignored */
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dma_free_coherent(dev, size, cpu_addr, dma_handle);
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}
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static inline void *dma_alloc_noncoherent(struct device *dev, size_t size,
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dma_addr_t *handle, gfp_t flag)
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{
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return dma_alloc_coherent(dev, size, handle, flag);
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}
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static inline void dma_free_noncoherent(struct device *dev, size_t size,
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void *addr, dma_addr_t handle)
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{
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dma_free_coherent(dev, size, addr, handle);
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}
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static inline void dma_cache_sync(struct device *dev, void *vaddr, size_t size,
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enum dma_data_direction dir)
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{
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/* we use coherent allocation, so not much to do here. */
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}
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extern dma_addr_t dma_map_single(struct device *, void *, size_t,
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enum dma_data_direction);
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static inline void dma_unmap_single(struct device *dev, dma_addr_t addr,
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size_t size, enum dma_data_direction dir)
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{
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}
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extern dma_addr_t dma_map_page(struct device *, struct page *,
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unsigned long, size_t size,
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enum dma_data_direction);
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static inline void dma_unmap_page(struct device *dev, dma_addr_t address,
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size_t size, enum dma_data_direction dir)
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{
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}
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extern int dma_map_sg(struct device *, struct scatterlist *, int,
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enum dma_data_direction);
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static inline void dma_unmap_sg(struct device *dev, struct scatterlist *sg,
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int nhwentries, enum dma_data_direction dir)
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{
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}
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extern void dma_sync_single_for_device(struct device *, dma_addr_t, size_t,
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enum dma_data_direction);
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extern void dma_sync_sg_for_device(struct device *, struct scatterlist *, int,
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enum dma_data_direction);
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static inline 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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{
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/* just sync everything for now */
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dma_sync_single_for_device(dev, dma_handle, offset + size, direction);
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}
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static inline void dma_sync_single_for_cpu(struct device *dev, dma_addr_t handle,
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size_t size, enum dma_data_direction dir)
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{
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}
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static inline void dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sg,
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int nents, enum dma_data_direction dir)
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{
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}
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static inline 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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{
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/* just sync everything for now */
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dma_sync_single_for_cpu(dev, dma_handle, offset + size, direction);
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}
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static inline int dma_mapping_error(struct device *dev, dma_addr_t handle)
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{
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return 0;
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}
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/* drivers/base/dma-mapping.c */
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extern int dma_common_mmap(struct device *dev, struct vm_area_struct *vma,
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void *cpu_addr, dma_addr_t dma_addr, size_t size);
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extern int dma_common_get_sgtable(struct device *dev, struct sg_table *sgt,
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void *cpu_addr, dma_addr_t dma_addr,
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size_t size);
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#define dma_mmap_coherent(d, v, c, h, s) dma_common_mmap(d, v, c, h, s)
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#define dma_get_sgtable(d, t, v, h, s) dma_common_get_sgtable(d, t, v, h, s)
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#endif /* _M68K_DMA_MAPPING_H */
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