Previously we discussed some issues with applying the LRU mapping policy to the SDMA engines. Mainly, if both ring ids end up aliased to the same HW block, the total transfer bandwith an application can achieve will be severely impacted. E.g. an app uses one SDMA ring for upload and one for download. This small series prevents ring id aliasing and enables LRU mapping for the DMA ip blocks. This series depends on "Add support for high priority scheduling in amdgpu"
