Hi i915 and nouveau maintainers, any chance I could get some help to remove the remaining direct driver calls into swiotlb, namely swiotlb_max_segment and is_swiotlb_active. Either should not matter to a driver as they should be written to the DMA API. In the i915 case it seems like the driver should use dma_alloc_noncontiguous and/or dma_alloc_noncoherent to allocate DMAable memory instead of using alloc_page and the streaming dma mapping helpers. For the latter it seems like it should just stop passing use_dma_alloc == true to ttm_device_init and/or that function should switch to use dma_alloc_noncoherent.
