diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2025-09-09 16:27:33 +0300 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2025-09-12 00:18:20 +0200 |
| commit | 513559f73700966ded094b090c3ecc6dff877ef9 (patch) | |
| tree | 045f3cb6e9d92db44216774f305284f3a77003aa /include/linux | |
| parent | 76bb7c49f50ce7687f98eb35e78798584652dd0e (diff) | |
iommu/dma: rename iommu_dma_*map_page to iommu_dma_*map_phys
Rename the IOMMU DMA mapping functions to better reflect their actual
calling convention. The functions iommu_dma_map_page() and
iommu_dma_unmap_page() are renamed to iommu_dma_map_phys() and
iommu_dma_unmap_phys() respectively, as they already operate on physical
addresses rather than page structures.
The calling convention changes from accepting (struct page *page,
unsigned long offset) to (phys_addr_t phys), which eliminates the need
for page-to-physical address conversion within the functions. This
renaming prepares for the broader DMA API conversion from page-based
to physical address-based mapping throughout the kernel.
All callers are updated to pass physical addresses directly, including
dma_map_page_attrs(), scatterlist mapping functions, and DMA page
allocation helpers. The change simplifies the code by removing the
page_to_phys() + offset calculation that was previously done inside
the IOMMU functions.
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/ed172f95f8f57782beae04f782813366894e98df.1757423202.git.leonro@nvidia.com
Diffstat (limited to 'include/linux')
| -rw-r--r-- | include/linux/iommu-dma.h | 7 |
1 files changed, 3 insertions, 4 deletions
diff --git a/include/linux/iommu-dma.h b/include/linux/iommu-dma.h index 508beaa44c39..485bdffed988 100644 --- a/include/linux/iommu-dma.h +++ b/include/linux/iommu-dma.h @@ -21,10 +21,9 @@ static inline bool use_dma_iommu(struct device *dev) } #endif /* CONFIG_IOMMU_DMA */ -dma_addr_t iommu_dma_map_page(struct device *dev, struct page *page, - unsigned long offset, size_t size, enum dma_data_direction dir, - unsigned long attrs); -void iommu_dma_unmap_page(struct device *dev, dma_addr_t dma_handle, +dma_addr_t iommu_dma_map_phys(struct device *dev, phys_addr_t phys, size_t size, + enum dma_data_direction dir, unsigned long attrs); +void iommu_dma_unmap_phys(struct device *dev, dma_addr_t dma_handle, size_t size, enum dma_data_direction dir, unsigned long attrs); int iommu_dma_map_sg(struct device *dev, struct scatterlist *sg, int nents, enum dma_data_direction dir, unsigned long attrs); |