1# 2# DMA engine configuration 3# 4 5menuconfig DMADEVICES 6 bool "DMA Engine support" 7 depends on (PCI && X86) || ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX 8 depends on !HIGHMEM64G 9 help 10 DMA engines can do asynchronous data transfers without 11 involving the host CPU. Currently, this framework can be 12 used to offload memory copies in the network stack and 13 RAID operations in the MD driver. 14 15if DMADEVICES 16 17comment "DMA Devices" 18 19config INTEL_IOATDMA 20 tristate "Intel I/OAT DMA support" 21 depends on PCI && X86 22 select DMA_ENGINE 23 select DCA 24 help 25 Enable support for the Intel(R) I/OAT DMA engine present 26 in recent Intel Xeon chipsets. 27 28 Say Y here if you have such a chipset. 29 30 If unsure, say N. 31 32config INTEL_IOP_ADMA 33 tristate "Intel IOP ADMA support" 34 depends on ARCH_IOP32X || ARCH_IOP33X || ARCH_IOP13XX 35 select ASYNC_CORE 36 select DMA_ENGINE 37 help 38 Enable support for the Intel(R) IOP Series RAID engines. 39 40config DMA_ENGINE 41 bool 42 43comment "DMA Clients" 44 depends on DMA_ENGINE 45 46config NET_DMA 47 bool "Network: TCP receive copy offload" 48 depends on DMA_ENGINE && NET 49 help 50 This enables the use of DMA engines in the network stack to 51 offload receive copy-to-user operations, freeing CPU cycles. 52 Since this is the main user of the DMA engine, it should be enabled; 53 say Y here. 54 55endif 56