Commit 45fa6d19 authored by Leon Romanovsky's avatar Leon Romanovsky Committed by Marek Szyprowski
Browse files

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: default avatarJason Gunthorpe <jgg@nvidia.com>
Signed-off-by: default avatarLeon Romanovsky <leonro@nvidia.com>
Signed-off-by: default avatarMarek Szyprowski <m.szyprowski@samsung.com>
Link: https://lore.kernel.org/r/20251015-remove-map-page-v5-2-3bbfe3a25cdf@kernel.org
parent ed7fc3cb

kernel/dma/dummy.c

+6 −7
Original line number Diff line number Diff line
@@ -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,