forked from Minki/linux
6d4f5879b6
This patch corrects recently changed (and now invalid) Kconfig descriptions for the DMA engine framework: - Non-Intel(R) hardware also has DMA engines; - DMA is used for more than memcpy and RAID offloading. In fact, on most platforms memcpy and RAID aren't factors, and DMA exists so that peripherals can transfer data to/from memory while the CPU does other work. Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com> Signed-off-by: David Brownell <dbrownell@users.sourceforge.net> Signed-off-by: Dan Williams <dan.j.williams@intel.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
55 lines
1.3 KiB
Plaintext
55 lines
1.3 KiB
Plaintext
#
|
|
# DMA engine configuration
|
|
#
|
|
|
|
menuconfig DMADEVICES
|
|
bool "DMA Engine support"
|
|
depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
|
|
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.
|
|
|
|
if DMADEVICES
|
|
|
|
comment "DMA Devices"
|
|
|
|
config INTEL_IOATDMA
|
|
tristate "Intel I/OAT DMA support"
|
|
depends on PCI && X86
|
|
select DMA_ENGINE
|
|
select DCA
|
|
help
|
|
Enable support for the Intel(R) I/OAT DMA engine present
|
|
in recent Intel Xeon chipsets.
|
|
|
|
Say Y here if you have such a chipset.
|
|
|
|
If unsure, say N.
|
|
|
|
config INTEL_IOP_ADMA
|
|
tristate "Intel IOP ADMA support"
|
|
depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX
|
|
select ASYNC_CORE
|
|
select DMA_ENGINE
|
|
help
|
|
Enable support for the Intel(R) IOP Series RAID engines.
|
|
|
|
config DMA_ENGINE
|
|
bool
|
|
|
|
comment "DMA Clients"
|
|
depends on DMA_ENGINE
|
|
|
|
config NET_DMA
|
|
bool "Network: TCP receive copy offload"
|
|
depends on DMA_ENGINE && NET
|
|
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.
|
|
|
|
endif
|