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authorDan Williams <dan.j.williams@intel.com>2008-06-27 12:21:11 +0400
committerDan Williams <dan.j.williams@intel.com>2008-07-08 22:58:12 +0400
commit9c402f4e196290692d998b188f9094deb1619e57 (patch)
treed61209d265890e20d8d2933e88fb58c8075454ac /drivers/dma
parent1099dc79245719c046e632212ec09d6ec1154ef5 (diff)
downloadlinux-9c402f4e196290692d998b188f9094deb1619e57.tar.xz
dmaengine: remove arch dependency from DMADEVICES
The dependency is redundant since all drivers set their specific arch dependencies. The NET_DMA option is modified to be enabled only on platforms where it is known to have a positive effect. HAS_DMA is added as an explicit dependency for the DMADEVICES menu. Acked-by: Adrian Bunk <bunk@kernel.org> Acked-by: Haavard Skinnemoen <haavard.skinnemoen@atmel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma')
-rw-r--r--drivers/dma/Kconfig13
1 files changed, 8 insertions, 5 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index 6239c3df30ac..e4dd0065da33 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -4,13 +4,14 @@
menuconfig DMADEVICES
bool "DMA Engine support"
- depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX || PPC
- depends on !HIGHMEM64G
+ depends on !HIGHMEM64G && HAS_DMA
help
DMA engines can do asynchronous data transfers without
involving the host CPU. Currently, this framework can be
used to offload memory copies in the network stack and
- RAID operations in the MD driver.
+ RAID operations in the MD driver. This menu only presents
+ DMA Device drivers supported by the configured arch, it may
+ be empty in some cases.
if DMADEVICES
@@ -55,10 +56,12 @@ comment "DMA Clients"
config NET_DMA
bool "Network: TCP receive copy offload"
depends on DMA_ENGINE && NET
+ default (INTEL_IOATDMA || FSL_DMA)
help
This enables the use of DMA engines in the network stack to
offload receive copy-to-user operations, freeing CPU cycles.
- Since this is the main user of the DMA engine, it should be enabled;
- say Y here.
+
+ Say Y here if you enabled INTEL_IOATDMA or FSL_DMA, otherwise
+ say N.
endif