0cb0ae6832
i386 base does not need it, so it gets an empty function. Signed-off-by: Glauber Costa <gcosta@redhat.com> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
80 lines
2.5 KiB
C
80 lines
2.5 KiB
C
#ifndef _ASM_DMA_MAPPING_H_
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#define _ASM_DMA_MAPPING_H_
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/*
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* IOMMU interface. See Documentation/DMA-mapping.txt and DMA-API.txt for
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* documentation.
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*/
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#include <linux/scatterlist.h>
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#include <asm/io.h>
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#include <asm/swiotlb.h>
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struct dma_mapping_ops {
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int (*mapping_error)(dma_addr_t dma_addr);
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void* (*alloc_coherent)(struct device *dev, size_t size,
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dma_addr_t *dma_handle, gfp_t gfp);
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void (*free_coherent)(struct device *dev, size_t size,
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void *vaddr, dma_addr_t dma_handle);
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dma_addr_t (*map_single)(struct device *hwdev, void *ptr,
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size_t size, int direction);
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/* like map_single, but doesn't check the device mask */
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dma_addr_t (*map_simple)(struct device *hwdev, char *ptr,
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size_t size, int direction);
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void (*unmap_single)(struct device *dev, dma_addr_t addr,
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size_t size, int direction);
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void (*sync_single_for_cpu)(struct device *hwdev,
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dma_addr_t dma_handle, size_t size,
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int direction);
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void (*sync_single_for_device)(struct device *hwdev,
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dma_addr_t dma_handle, size_t size,
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int direction);
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void (*sync_single_range_for_cpu)(struct device *hwdev,
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dma_addr_t dma_handle, unsigned long offset,
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size_t size, int direction);
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void (*sync_single_range_for_device)(struct device *hwdev,
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dma_addr_t dma_handle, unsigned long offset,
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size_t size, int direction);
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void (*sync_sg_for_cpu)(struct device *hwdev,
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struct scatterlist *sg, int nelems,
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int direction);
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void (*sync_sg_for_device)(struct device *hwdev,
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struct scatterlist *sg, int nelems,
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int direction);
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int (*map_sg)(struct device *hwdev, struct scatterlist *sg,
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int nents, int direction);
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void (*unmap_sg)(struct device *hwdev,
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struct scatterlist *sg, int nents,
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int direction);
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int (*dma_supported)(struct device *hwdev, u64 mask);
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int is_phys;
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};
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extern const struct dma_mapping_ops *dma_ops;
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#ifdef CONFIG_X86_32
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# include "dma-mapping_32.h"
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#else
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# include "dma-mapping_64.h"
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#endif
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static inline dma_addr_t
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dma_map_single(struct device *hwdev, void *ptr, size_t size,
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int direction)
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{
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BUG_ON(!valid_dma_direction(direction));
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return dma_ops->map_single(hwdev, ptr, size, direction);
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}
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static inline void
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dma_unmap_single(struct device *dev, dma_addr_t addr, size_t size,
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int direction)
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{
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BUG_ON(!valid_dma_direction(direction));
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if (dma_ops->unmap_single)
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dma_ops->unmap_single(dev, addr, size, direction);
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}
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#endif
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