netdev - Re: [P.A. Semi] Does the ethernet interface work on your Electra, Chitra, Nemo, and Athena board?

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Message-ID: <CAOJe8K0FQOM=ea3qa=g4eOVbhCpyi5OQRWF8Mh1NZ8-mpUWJjw@mail.gmail.com>
Date:	Tue, 8 Dec 2015 10:32:57 +0300
From:	Denis Kirjanov <kda@...ux-powerpc.org>
To:	Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc:	Michael Ellerman <mpe@...erman.id.au>,
	Gabriel Paubert <paubert@...m.es>,
	Christian Zigotzky <chzigotzky@...osoft.de>,
	netdev@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: Re: [P.A. Semi] Does the ethernet interface work on your Electra,
 Chitra, Nemo, and Athena board?

On 12/7/15, Christian Zigotzky <chzigotzky@...osoft.de> wrote:
> Hi all,
>
> I have some good news for you. I was able to fix the issue with the P.A.
> Semi Ethernet. It was a problem with the new DMA handling. The patch '
> [RFC/PATCH,v2] powerpc/iommu: Support "hybrid" iommu/direct DMA ops for
> coherent_mask < dma_mask (https://patchwork.ozlabs.org/patch/472535/)'
> is the problem.
>
> I had patched the following files before I compiled a kernel.
>
> arch/powerpc/Kconfig
> arch/powerpc/include/asm/device.h
> arch/powerpc/include/asm/dma-mapping.h
> arch/powerpc/include/asm/iommu.h
> arch/powerpc/kernel/dma-iommu.c
> arch/powerpc/kernel/dma-swiotlb.c
> arch/powerpc/kernel/dma.c
> arch/powerpc/platforms/powernv/pci-ioda.c
> arch/powerpc/platforms/pseries/iommu.c
> arch/powerpc/sysdev/dart_iommu.c
> include/asm-generic/dma-mapping-common.h
>
> The P.A. Semi Ethernet works again with the patched kernel.

Hi Ben,

Could you please take a look..

Thanks!

>
> I am happy. :-)
>
> Please fix the issue in the kernel source code.
>
> Thanks in advance,
>
> Christian
>
>
>
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