Commit 3d09ff45 authored by Christoph Hellwig's avatar Christoph Hellwig
Browse files

iommu/dma: remove most stubs in iommu-dma.h 



The direct calls from mapping.c all guarded by use_dma_iommu(), so don't
bother to provide stubs, but instead just expose the prototypes
unconditionally.

Signed-off-by: default avatarChristoph Hellwig <hch@lst.de>
Reviewed-by: default avatarLeon Romanovsky <leon@kernel.org>
parent bb0e3919

include/linux/iommu-dma.h

+8 −100
Original line number Diff line number Diff line
@@ -14,6 +14,13 @@ static inline bool use_dma_iommu(struct device *dev) 
{

	return dev->dma_iommu;

}

#else

static inline bool use_dma_iommu(struct device *dev)

{

	return false;

}

#endif /* CONFIG_IOMMU_DMA */



dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page,

		unsigned long offset, size_t size, enum dma_data_direction dir,

		unsigned long attrs);
@@ -58,104 +65,5 @@ void iommu_dma_sync_sg_for_cpu(struct device *dev, struct scatterlist *sgl, 
		int nelems, enum dma_data_direction dir);

void iommu_dma_sync_sg_for_device(struct device *dev, struct scatterlist *sgl,

		int nelems, enum dma_data_direction dir);

#else

static inline bool use_dma_iommu(struct device *dev)

{

	return false;

}

static inline dma_addr_t iommu_dma_map_page(struct device *dev,

		struct page *page, unsigned long offset, size_t size,

		enum dma_data_direction dir, unsigned long attrs)

{

	return DMA_MAPPING_ERROR;

}

static inline void iommu_dma_unmap_page(struct device *dev,

		dma_addr_t dma_handle, size_t size, enum dma_data_direction dir,

		unsigned long attrs)

{

}

static inline int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg,

		int nents, enum dma_data_direction dir, unsigned long attrs)

{

	return -EINVAL;

}

static inline void iommu_dma_unmap_sg(struct device *dev,

		struct scatterlist *sg, int nents, enum dma_data_direction dir,

		unsigned long attrs)

{

}

static inline void *iommu_dma_alloc(struct device *dev, size_t size,

		dma_addr_t *handle, gfp_t gfp, unsigned long attrs)

{

	return NULL;

}

static inline int iommu_dma_mmap(struct device *dev, struct vm_area_struct *vma,

		void *cpu_addr, dma_addr_t dma_addr, size_t size,

		unsigned long attrs)

{

	return -EINVAL;

}

static inline int iommu_dma_get_sgtable(struct device *dev,

		struct sg_table *sgt, void *cpu_addr, dma_addr_t dma_addr,

		size_t size, unsigned long attrs)

{

	return -EINVAL;

}

static inline unsigned long iommu_dma_get_merge_boundary(struct device *dev)

{

	return 0;

}

static inline size_t iommu_dma_opt_mapping_size(void)

{

	return 0;

}

static inline size_t iommu_dma_max_mapping_size(struct device *dev)

{

	return 0;

}

static inline void iommu_dma_free(struct device *dev, size_t size,

		void *cpu_addr, dma_addr_t handle, unsigned long attrs)

{

}

static inline dma_addr_t iommu_dma_map_resource(struct device *dev,

		phys_addr_t phys, size_t size, enum dma_data_direction dir,

		unsigned long attrs)

{

	return DMA_MAPPING_ERROR;

}

static inline void iommu_dma_unmap_resource(struct device *dev,

		dma_addr_t handle, size_t size, enum dma_data_direction dir,

		unsigned long attrs)

{

}

static inline struct sg_table *

iommu_dma_alloc_noncontiguous(struct device *dev, size_t size,

		enum dma_data_direction dir, gfp_t gfp, unsigned long attrs)

{

	return NULL;

}

static inline void iommu_dma_free_noncontiguous(struct device *dev, size_t size,

		struct sg_table *sgt, enum dma_data_direction dir)

{

}

static inline void iommu_dma_sync_single_for_cpu(struct device *dev,

		dma_addr_t dma_handle, size_t size,

		enum dma_data_direction dir)

{

}

static inline void iommu_dma_sync_single_for_device(struct device *dev,

		dma_addr_t dma_handle, size_t size, enum dma_data_direction dir)

{

}

static inline void iommu_dma_sync_sg_for_cpu(struct device *dev,

		struct scatterlist *sgl, int nelems,

		enum dma_data_direction dir)

{

}

static inline void iommu_dma_sync_sg_for_device(struct device *dev,

		struct scatterlist *sgl, int nelems,

		enum dma_data_direction dir)

{

}

#endif /* CONFIG_IOMMU_DMA */



#endif /* _LINUX_IOMMU_DMA_H */