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dma-mapping: convert dummy ops to physical address mapping

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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
This commit is contained in:
Leon Romanovsky
2025-10-15 12:12:48 +03:00
committed by Marek Szyprowski
parent ed7fc3cbb3
commit 45fa6d190d
1 changed files with 6 additions and 7 deletions
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13
kernel/dma/dummy.c
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@@ -11,17 +11,16 @@ static int dma_dummy_mmap(struct device *dev, struct vm_area_struct *vma,
return -ENXIO;
}
static dma_addr_t dma_dummy_map_page(struct device *dev, struct page *page,
unsigned long offset, size_t size, enum dma_data_direction dir,
unsigned long attrs)
static dma_addr_t dma_dummy_map_phys(struct device *dev, phys_addr_t phys,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
return DMA_MAPPING_ERROR;
}
static void dma_dummy_unmap_page(struct device *dev, dma_addr_t dma_handle,
static void dma_dummy_unmap_phys(struct device *dev, dma_addr_t dma_handle,
size_t size, enum dma_data_direction dir, unsigned long attrs)
{
/*
* Dummy ops doesn't support map_page, so unmap_page should never be
* Dummy ops doesn't support map_phys, so unmap_page should never be
* called.
*/
WARN_ON_ONCE(true);
@@ -51,8 +50,8 @@ static int dma_dummy_supported(struct device *hwdev, u64 mask)
const struct dma_map_ops dma_dummy_ops = {
.mmap = dma_dummy_mmap,
.map_page = dma_dummy_map_page,
.unmap_page = dma_dummy_unmap_page,
.map_phys = dma_dummy_map_phys,
.unmap_phys = dma_dummy_unmap_phys,
.map_sg = dma_dummy_map_sg,
.unmap_sg = dma_dummy_unmap_sg,
.dma_supported = dma_dummy_supported,