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This is the exact same thing I need for iommufd. > > rockchip is managing its own iommu domain and you cannot map to an > iommu domain without using a physical address. > > Of course it is *completely* illegal to call iommu_map_sgtable() in the > importer side of a dmabuf. Yeah we are deprecating this for the last ~5 years now. This bubbled up because I change to DMA-buf debug code to be enabled by default on DEBUG_KERNEL. Rob is now working on a solution right now for MSM which should be used for rockchip as well. Regards, Christian. > > static int rockchip_gem_iommu_map(struct rockchip_gem_object *rk_obj) > { > [..] > ret = iommu_map_sgtable(private->domain, rk_obj->dma_addr, rk_obj->sgt, > prot); > > Jason