On Tue, Aug 19, 2025 at 08:36:50PM +0300, Leon Romanovsky wrote: > From: Leon Romanovsky <leo...@nvidia.com> > > Combine iommu_dma_*map_phys with iommu_dma_*map_resource interfaces in > order to allow single phys_addr_t flow. > > In the following patches, the iommu_dma_map_resource() will be removed > in favour of iommu_dma_map_phys(..., attrs | DMA_ATTR_MMIO) flow.
I would reword this a little bit iommu/dma: implement DMA_ATTR_MMIO for iommu_dma_(un)map_phys() Make iommu_dma_map_phys() and iommu_dma_unmap_phys() respect DMA_ATTR_MMIO. DMA_ATTR_MMIO makes the functions behave the same as iommu_dma_(un)map_resource(): - No swiotlb is possible - No cache flushing is done (ATTR_MMIO should not be cached memory) - prot for iommu_map() has IOMMU_MMIO not IOMMU_CACHE This is preperation for replacing iommu_dma_map_resource() callers with iommu_dma_map_phys(DMA_ATTR_MMIO) and removing iommu_dma_(un)map_resource(). Reviewed-by: Jason Gunthorpe <j...@nvidia.com> Jason
