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Convert the DMA debug infrastructure from page-based to physical address-based mapping as a preparation to rely on physical address for DMA mapping routines. The refactoring renames debug_dma_map_page() to debug_dma_map_phys() and changes its signature to accept a phys_addr_t parameter instead of struct page and offset. Similarly, debug_dma_unmap_page() becomes debug_dma_unmap_phys(). A new dma_debug_phy type is introduced to distinguish physical address mappings from other debug entry types. All callers throughout the codebase are updated to pass physical addresses directly, eliminating the need for page-to-physical conversion in the debug layer. This refactoring eliminates the need to convert between page pointers and physical addresses in the debug layer, making the code more efficient and consistent with the DMA mapping API's physical address focus. Reviewed-by: Jason Gunthorpe <jgg@nvidia.com> Signed-off-by: Leon Romanovsky <leonro@nvidia.com> [mszyprow: added a fixup] Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lore.kernel.org/r/56d1a6769b68dfcbf8b26a75a7329aeb8e3c3b6a.1757423202.git.leonro@nvidia.com Link: https://lore.kernel.org/all/20250910052618.GH341237@unreal/
148 lines
4.2 KiB
C
148 lines
4.2 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_phys(struct device *dev, phys_addr_t phys,
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size_t size, int direction, dma_addr_t dma_addr,
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unsigned long attrs);
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extern void debug_dma_unmap_phys(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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extern void debug_dma_alloc_pages(struct device *dev, struct page *page,
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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_free_pages(struct device *dev, struct page *page,
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size_t size, int direction,
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dma_addr_t dma_addr);
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#else /* CONFIG_DMA_API_DEBUG */
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static inline void debug_dma_map_phys(struct device *dev, phys_addr_t phys,
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size_t size, int direction,
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dma_addr_t dma_addr, unsigned long attrs)
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{
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}
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static inline void debug_dma_unmap_phys(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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static inline void debug_dma_alloc_pages(struct device *dev, struct page *page,
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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_free_pages(struct device *dev, struct page *page,
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size_t size, int direction,
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dma_addr_t dma_addr)
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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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