dmaengine: allow dma support for async_tx to be toggled
Provide a config option for blocking the allocation of dma channels to
the async_tx api.
Signed-off-by: Dan Williams <dan.j.williams@intel.com>
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 48ea59e..3b3c01b 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -98,6 +98,17 @@
Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
say N.
+config ASYNC_TX_DMA
+ bool "Async_tx: Offload support for the async_tx api"
+ depends on DMA_ENGINE
+ help
+ This allows the async_tx api to take advantage of offload engines for
+ memcpy, memset, xor, and raid6 p+q operations. If your platform has
+ a dma engine that can perform raid operations and you have enabled
+ MD_RAID456 say Y.
+
+ If unsure, say N.
+
config DMATEST
tristate "DMA Test client"
depends on DMA_ENGINE