Re: [PATCH 2/4] dmaengine: Xilinx MPMC Kconfig/make
From: Dan Williams
Date: Wed Mar 24 2010 - 20:46:23 EST
On Wed, Mar 17, 2010 at 9:26 AM, Steven J. Magnani
<steve@xxxxxxxxxxxxxxx> wrote:
> Integrate xlldma drivers into the build.
>
> Signed-off-by: Steven J. Magnani <steve@xxxxxxxxxxxxxxx>
> ---
> diff -uprN a/drivers/dma/Kconfig b/drivers/dma/Kconfig
> --- a/drivers/dma/Kconfig 2010-03-16 13:27:42.000000000 -0500
> +++ b/drivers/dma/Kconfig 2010-03-17 11:11:57.000000000 -0500
> @@ -126,6 +126,28 @@ config AMCC_PPC440SPE_ADMA
> help
> Enable support for the AMCC PPC440SPe RAID engines.
>
> +config XLL_DMA
> + tristate "Xilinx LocalLink DMA support"
> + depends on XILINX_VIRTEX || MICROBLAZE
> + select DMA_ENGINE
> + ---help---
> + Enable support for the Xilinx MPMC DMA controller.
> + This requires at least one MPMC SDMA port wired as a "loopback".
> +
> + If unsure, say N.
> +
> +config XLL_DMA_OF
> + tristate "Xilinx LocalLink DMA OF device"
> + depends on XLL_DMA && OF
> + help
> + OpenFirmware bus attachment for the Xilinx LocalLink DMA engine.
> +
> +config XLL_DMA_PLAT
> + tristate "Xilinx LocalLink DMA platform device"
> + depends on XLL_DMA
> + help
> + Platform bus attachment for the Xilinx LocalLink DMA engine.
I think these should be in the per-arch Kconfig, if at all.
> +
> config ARCH_HAS_ASYNC_TX_FIND_CHANNEL
> bool
>
> @@ -138,13 +160,13 @@ comment "DMA Clients"
> config NET_DMA
> bool "Network: TCP receive copy offload"
> depends on DMA_ENGINE && NET
> - default (INTEL_IOATDMA || FSL_DMA)
> + default (INTEL_IOATDMA || FSL_DMA || XLL_DMA)
NET_DMA is actively harmful for platforms with a non-io-coherent
caches. So it should not default to y on Microblaze.
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