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 /kernel/dma | |
| 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 'kernel/dma')
| -rw-r--r-- | kernel/dma/mapping.c | 4 | ||||
| -rw-r--r-- | kernel/dma/ops_helpers.c | 6 |
2 files changed, 5 insertions, 5 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index bd3bb6d59d72..90ad728205b9 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -169,7 +169,7 @@ dma_addr_t dma_map_page_attrs(struct device *dev, struct page *page, arch_dma_map_page_direct(dev, phys + size)) addr = dma_direct_map_page(dev, page, offset, size, dir, attrs); else if (use_dma_iommu(dev)) - addr = iommu_dma_map_page(dev, page, offset, size, dir, attrs); + addr = iommu_dma_map_phys(dev, phys, size, dir, attrs); else addr = ops->map_page(dev, page, offset, size, dir, attrs); kmsan_handle_dma(page, offset, size, dir); @@ -190,7 +190,7 @@ void dma_unmap_page_attrs(struct device *dev, dma_addr_t addr, size_t size, arch_dma_unmap_page_direct(dev, addr + size)) dma_direct_unmap_page(dev, addr, size, dir, attrs); else if (use_dma_iommu(dev)) - iommu_dma_unmap_page(dev, addr, size, dir, attrs); + iommu_dma_unmap_phys(dev, addr, size, dir, attrs); else ops->unmap_page(dev, addr, size, dir, attrs); trace_dma_unmap_phys(dev, addr, size, dir, attrs); diff --git a/kernel/dma/ops_helpers.c b/kernel/dma/ops_helpers.c index 9afd569eadb9..6f9d604d9d40 100644 --- a/kernel/dma/ops_helpers.c +++ b/kernel/dma/ops_helpers.c @@ -72,8 +72,8 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size, return NULL; if (use_dma_iommu(dev)) - *dma_handle = iommu_dma_map_page(dev, page, 0, size, dir, - DMA_ATTR_SKIP_CPU_SYNC); + *dma_handle = iommu_dma_map_phys(dev, page_to_phys(page), size, + dir, DMA_ATTR_SKIP_CPU_SYNC); else *dma_handle = ops->map_page(dev, page, 0, size, dir, DMA_ATTR_SKIP_CPU_SYNC); @@ -92,7 +92,7 @@ void dma_common_free_pages(struct device *dev, size_t size, struct page *page, const struct dma_map_ops *ops = get_dma_ops(dev); if (use_dma_iommu(dev)) - iommu_dma_unmap_page(dev, dma_handle, size, dir, + iommu_dma_unmap_phys(dev, dma_handle, size, dir, DMA_ATTR_SKIP_CPU_SYNC); else if (ops->unmap_page) ops->unmap_page(dev, dma_handle, size, dir, |