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