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c2bbf9d1e9
Mapping something twice should be possible as long as, DMA_ATTR_SKIP_CPU_SYNC is passed to the strictly speaking second relevant mapping operation (that attempts to map the same thing). So, don't issue a warning if the specified condition is met in add_dma_entry(). Signed-off-by: Hamza Mahfooz <someguy@effective-light.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
130 lines
3.6 KiB
C
130 lines
3.6 KiB
C
/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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*
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* Author: Joerg Roedel <joerg.roedel@amd.com>
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*/
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#ifndef _KERNEL_DMA_DEBUG_H
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#define _KERNEL_DMA_DEBUG_H
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#ifdef CONFIG_DMA_API_DEBUG
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extern void debug_dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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int direction, dma_addr_t dma_addr,
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unsigned long attrs);
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extern void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, int direction);
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extern void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, int mapped_ents, int direction,
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unsigned long attrs);
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extern void debug_dma_unmap_sg(struct device *dev, struct scatterlist *sglist,
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int nelems, int dir);
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extern void debug_dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t dma_addr, void *virt,
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unsigned long attrs);
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extern void debug_dma_free_coherent(struct device *dev, size_t size,
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void *virt, dma_addr_t addr);
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extern void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
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size_t size, int direction,
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dma_addr_t dma_addr,
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unsigned long attrs);
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extern void debug_dma_unmap_resource(struct device *dev, dma_addr_t dma_addr,
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size_t size, int direction);
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extern void debug_dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle, size_t size,
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int direction);
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extern void debug_dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction);
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extern void debug_dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction);
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extern void debug_dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction);
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#else /* CONFIG_DMA_API_DEBUG */
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static inline void debug_dma_map_page(struct device *dev, struct page *page,
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size_t offset, size_t size,
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int direction, dma_addr_t dma_addr,
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unsigned long attrs)
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{
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}
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static inline void debug_dma_unmap_page(struct device *dev, dma_addr_t addr,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_map_sg(struct device *dev, struct scatterlist *sg,
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int nents, int mapped_ents, int direction,
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unsigned long attrs)
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{
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}
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static inline void debug_dma_unmap_sg(struct device *dev,
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struct scatterlist *sglist,
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int nelems, int dir)
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{
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}
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static inline void debug_dma_alloc_coherent(struct device *dev, size_t size,
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dma_addr_t dma_addr, void *virt,
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unsigned long attrs)
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{
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}
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static inline void debug_dma_free_coherent(struct device *dev, size_t size,
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void *virt, dma_addr_t addr)
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{
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}
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static inline void debug_dma_map_resource(struct device *dev, phys_addr_t addr,
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size_t size, int direction,
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dma_addr_t dma_addr,
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unsigned long attrs)
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{
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}
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static inline void debug_dma_unmap_resource(struct device *dev,
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dma_addr_t dma_addr, size_t size,
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int direction)
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{
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}
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static inline void debug_dma_sync_single_for_cpu(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_sync_single_for_device(struct device *dev,
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dma_addr_t dma_handle,
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size_t size, int direction)
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{
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}
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static inline void debug_dma_sync_sg_for_cpu(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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}
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static inline void debug_dma_sync_sg_for_device(struct device *dev,
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struct scatterlist *sg,
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int nelems, int direction)
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{
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}
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#endif /* CONFIG_DMA_API_DEBUG */
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#endif /* _KERNEL_DMA_DEBUG_H */
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