On Fri, 2014-07-11 at 14:04 -0700, Sudeep Dutt wrote:
> From: Siva Yerramreddy <yshivakrishna@xxxxxxxxx>
>
> This patch implements DMA Engine API for DMA controller on MIC X100
> Coprocessors. DMA h/w is shared between host and card s/w.
> Channels 0 to 3 are used by host and 4 to 7 are used by card.
> Since the DMA device doesn't show up as PCIe device, a virtual bus called mic
> bus is created and virtual devices are added on that bus to follow device model.
> Allowed dma transfer directions are host to card, card to host and card to card.
>
> Reviewed-by: Ashutosh Dixit <ashutosh.dixit@xxxxxxxxx>
> Reviewed-by: Nikhil Rao <nikhil.rao@xxxxxxxxx>
> Reviewed-by: Sudeep Dutt <sudeep.dutt@xxxxxxxxx>
> Signed-off-by: Siva Yerramreddy <yshivakrishna@xxxxxxxxx>
> ---
> drivers/dma/Kconfig | 19 ++
> drivers/dma/Makefile | 1 +
> drivers/dma/mic_x100_dma.c | 774 +++++++++++++++++++++++++++++++++++++++++++++
> drivers/dma/mic_x100_dma.h | 286 +++++++++++++++++
> 4 files changed, 1080 insertions(+)
> create mode 100644 drivers/dma/mic_x100_dma.c
> create mode 100644 drivers/dma/mic_x100_dma.h
This patch was first included in linux-next in next-20140714.
> diff --git a/drivers/dma/Kconfig b/drivers/dma/Kconfig
> index 1eca7b9..7c8b8c4 100644
> --- a/drivers/dma/Kconfig
> +++ b/drivers/dma/Kconfig
> @@ -33,6 +33,25 @@ if DMADEVICES
>
> comment "DMA Devices"
>
> +config INTEL_MIC_X100_DMA
> + tristate "Intel MIC X100 DMA Driver"
> + depends on 64BIT && X86 && INTEL_MIC_BUS
> + select DMAENGINE
You probably meant
select DMA_ENGINE
> + default N
That should have been "default n". As (lowercase) "n" is the default
anyhow, that line might as well be dropped.
> + help
> + This enables DMA support for the Intel Many Integrated Core
> + (MIC) family of PCIe form factor coprocessor X100 devices that
> + run a 64 bit Linux OS. This driver will be used by both MIC
> + host and card drivers.
> +
> + If you are building host kernel with a MIC device or a card
> + kernel for a MIC device, then say M (recommended) or Y, else
> + say N. If unsure say N.
> +
> + More information about the Intel MIC family as well as the Linux
> + OS and tools for MIC to use with this driver are available from
> + <http://software.intel.com/en-us/mic-developer>.
> +
> config INTEL_MID_DMAC
> tristate "Intel MID DMA support for Peripheral DMA controllers"
> depends on PCI && X86
Should I submit the trivial, but untested, patch to fix this or do you
prefer to do that yourself?
Paul Bolle
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