Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
kernel
os
linux
dma-mapping: convert dummy ops to physical address mapping
Change dma_dummy_map_page and dma_dummy_unmap_page routines
to accept physical address and rename them.
Reviewed-by: Jason Gunthorpe <jgg@nvidia.com>
Signed-off-by: Leon Romanovsky <leonro@nvidia.com>
Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20251015-remove-map-page-v5-2-3bbfe3a25cdf@kernel.org
authored by
Leon Romanovsky
and committed by
Marek Szyprowski
45fa6d19
ed7fc3cb
+6
-7
+6
-7
kernel/dma/dummy.c
+6
-7
kernel/dma/dummy.c
···
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return -ENXIO;
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}
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-
static dma_addr_t dma_dummy_map_page(struct device *dev, struct page *page,
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-
unsigned long offset, size_t size, enum dma_data_direction dir,
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unsigned long attrs)
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+
static dma_addr_t dma_dummy_map_phys(struct device *dev, phys_addr_t phys,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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return DMA_MAPPING_ERROR;
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}
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static void dma_dummy_unmap_page(struct device *dev, dma_addr_t dma_handle,
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static void dma_dummy_unmap_phys(struct device *dev, dma_addr_t dma_handle,
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size_t size, enum dma_data_direction dir, unsigned long attrs)
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{
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/*
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* Dummy ops doesn't support map_page, so unmap_page should never be
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* Dummy ops doesn't support map_phys, so unmap_page should never be
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* called.
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*/
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WARN_ON_ONCE(true);
···
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const struct dma_map_ops dma_dummy_ops = {
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.mmap = dma_dummy_mmap,
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.map_page = dma_dummy_map_page,
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.unmap_page = dma_dummy_unmap_page,
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.map_phys = dma_dummy_map_phys,
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.unmap_phys = dma_dummy_unmap_phys,
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.map_sg = dma_dummy_map_sg,
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.unmap_sg = dma_dummy_unmap_sg,
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.dma_supported = dma_dummy_supported,