Lines Matching +full:dma +full:- +full:coherent

1 # SPDX-License-Identifier: GPL-2.0-only
82 # Select this option if the architecture assumes DMA devices are coherent
93 	bool "Dynamic allocation of DMA bounce buffers"
99 	  pools as needed. To reduce run-time kernel memory requirements, you
115 	bool "DMA Restricted Pool"
118 	  This enables support for restricted DMA pools which provide a level of
119 	  DMA memory protection on systems with limited hardware protection
123 	  <Documentation/devicetree/bindings/reserved-memory/reserved-memory.txt>
124 	  and <kernel/dma/swiotlb.c>.
128 # Should be selected if we can mmap non-coherent mappings to userspace.
152 # Fallback to arch code for DMA allocations.  This should eventually go away.
161 	bool "DMA Contiguous Memory Allocator"
165 	  to allocate big physically-contiguous blocks of memory for use with
166 	  hardware components that do not support I/O map nor scatter-gather.
171 	  For more information see <kernel/dma/contiguous.c>.
177 	bool "Enable separate DMA Contiguous Memory Area for NUMA Node"
181 	  can get local memory by DMA coherent APIs.
234 	  DMA mapping framework by default aligns all buffers to the smallest
250 	bool "Enable debugging of DMA-API usage"
253 	  Enable this option to debug the use of the DMA API by device drivers.
255 	  drivers like double-freeing of DMA mappings or freeing mappings that
259 	  debug device drivers and dma interactions.
264 	bool "Enable benchmarking of streaming DMA mapping"
270 	  See tools/testing/selftests/dma/dma_map_benchmark.c