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1# SPDX-License-Identifier: GPL-2.0-only2 3config AMD_QDMA4 tristate "AMD Queue-based DMA"5 depends on HAS_IOMEM6 select DMA_ENGINE7 select DMA_VIRTUAL_CHANNELS8 select REGMAP_MMIO9 help10 Enable support for the AMD Queue-based DMA subsystem. The primary11 mechanism to transfer data using the QDMA is for the QDMA engine to12 operate on instructions (descriptors) provided by the host operating13 system. Using the descriptors, the QDMA can move data in either the14 Host to Card (H2C) direction or the Card to Host (C2H) direction.15