diff options
| author | Leon Romanovsky <leonro@nvidia.com> | 2025-10-15 12:12:47 +0300 |
|---|---|---|
| committer | Marek Szyprowski <m.szyprowski@samsung.com> | 2025-10-29 10:27:29 +0100 |
| commit | ed7fc3cbb38ffdca7a189e15982ce96acab4684c (patch) | |
| tree | 74bb75c3137b2a40aca4d811173d357f9918aa42 /kernel/dma | |
| parent | f74ee32963f1b74865fe679e2475450434fea51c (diff) | |
dma-mapping: prepare dma_map_ops to conversion to physical address
Add new .map_phys() and .unmap_phys() callbacks to dma_map_ops as a
preparation to replace .map_page() and .unmap_page() respectively.
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-v5-1-3bbfe3a25cdf@kernel.org
Diffstat (limited to 'kernel/dma')
| -rw-r--r-- | kernel/dma/mapping.c | 4 | ||||
| -rw-r--r-- | kernel/dma/ops_helpers.c | 12 |
2 files changed, 14 insertions, 2 deletions
diff --git a/kernel/dma/mapping.c b/kernel/dma/mapping.c index fe7472f13b10..4080aebe5deb 100644 --- a/kernel/dma/mapping.c +++ b/kernel/dma/mapping.c @@ -169,6 +169,8 @@ dma_addr_t dma_map_phys(struct device *dev, phys_addr_t phys, size_t size, addr = dma_direct_map_phys(dev, phys, size, dir, attrs); else if (use_dma_iommu(dev)) addr = iommu_dma_map_phys(dev, phys, size, dir, attrs); + else if (ops->map_phys) + addr = ops->map_phys(dev, phys, size, dir, attrs); else if (is_mmio) { if (!ops->map_resource) return DMA_MAPPING_ERROR; @@ -223,6 +225,8 @@ void dma_unmap_phys(struct device *dev, dma_addr_t addr, size_t size, dma_direct_unmap_phys(dev, addr, size, dir, attrs); else if (use_dma_iommu(dev)) iommu_dma_unmap_phys(dev, addr, size, dir, attrs); + else if (ops->unmap_phys) + ops->unmap_phys(dev, addr, size, dir, attrs); else if (is_mmio) { if (ops->unmap_resource) ops->unmap_resource(dev, addr, size, dir, attrs); diff --git a/kernel/dma/ops_helpers.c b/kernel/dma/ops_helpers.c index 6f9d604d9d40..1eccbdbc99c1 100644 --- a/kernel/dma/ops_helpers.c +++ b/kernel/dma/ops_helpers.c @@ -64,6 +64,7 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size, { const struct dma_map_ops *ops = get_dma_ops(dev); struct page *page; + phys_addr_t phys; page = dma_alloc_contiguous(dev, size, gfp); if (!page) @@ -71,9 +72,13 @@ struct page *dma_common_alloc_pages(struct device *dev, size_t size, if (!page) return NULL; + phys = page_to_phys(page); if (use_dma_iommu(dev)) - *dma_handle = iommu_dma_map_phys(dev, page_to_phys(page), size, - dir, DMA_ATTR_SKIP_CPU_SYNC); + *dma_handle = iommu_dma_map_phys(dev, phys, size, dir, + DMA_ATTR_SKIP_CPU_SYNC); + else if (ops->map_phys) + *dma_handle = ops->map_phys(dev, phys, size, dir, + DMA_ATTR_SKIP_CPU_SYNC); else *dma_handle = ops->map_page(dev, page, 0, size, dir, DMA_ATTR_SKIP_CPU_SYNC); @@ -94,6 +99,9 @@ void dma_common_free_pages(struct device *dev, size_t size, struct page *page, if (use_dma_iommu(dev)) iommu_dma_unmap_phys(dev, dma_handle, size, dir, DMA_ATTR_SKIP_CPU_SYNC); + else if (ops->unmap_phys) + ops->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, DMA_ATTR_SKIP_CPU_SYNC); |