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authorSaeed Bishara <saeed@marvell.com>2008-07-08 20:58:36 +0200
committerDan Williams <dan.j.williams@intel.com>2008-07-08 20:58:36 +0200
commitff7b04796d9866327ea76e1393f1e902ef032f84 (patch)
tree42fd30c8e2051e7c6acc15da363960647030d3d3 /drivers/dma/Kconfig
parentiop-adma: fix platform driver hotplug/coldplug (diff)
downloadlinux-ff7b04796d9866327ea76e1393f1e902ef032f84.tar.xz
linux-ff7b04796d9866327ea76e1393f1e902ef032f84.zip
dmaengine: DMA engine driver for Marvell XOR engine
The XOR engine found in Marvell's SoCs and system controllers provides XOR and DMA operation, iSCSI CRC32C calculation, memory initialization, and memory ECC error cleanup operation support. This driver implements the DMA engine API and supports the following capabilities: - memcpy - xor - memset The XOR engine can be used by DMA engine clients implemented in the kernel, one of those clients is the RAID module. In that case, I observed 20% improvement in the raid5 write throughput, and 40% decrease in the CPU utilization when doing array construction, those results obtained on an 5182 running at 500Mhz. When enabling the NET DMA client, the performance decreased, so meanwhile it is recommended to keep this client off. Signed-off-by: Saeed Bishara <saeed@marvell.com> Signed-off-by: Lennert Buytenhek <buytenh@marvell.com> Signed-off-by: Nicolas Pitre <nico@marvell.com> Acked-by: Maciej Sosnowski <maciej.sosnowski@intel.com> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
Diffstat (limited to 'drivers/dma/Kconfig')
-rw-r--r--drivers/dma/Kconfig8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
index e4dd0065da33..5af8b1cfc1e9 100644
--- a/drivers/dma/Kconfig
+++ b/drivers/dma/Kconfig
@@ -47,6 +47,14 @@ config FSL_DMA
MPC8560/40, MPC8555, MPC8548 and MPC8641 processors.
The MPC8349, MPC8360 is also supported.
+config MV_XOR
+ bool "Marvell XOR engine support"
+ depends on PLAT_ORION
+ select ASYNC_CORE
+ select DMA_ENGINE
+ ---help---
+ Enable support for the Marvell XOR engine.
+
config DMA_ENGINE
bool