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 Thu, 13 Dec 2018 14:34:50 +0100 (CET)
Subject: Re: use generic DMA mapping code in powerpc V4
To: Christoph Hellwig <hch@lst.de>
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From: Christian Zigotzky <chzigotzky@xenosoft.de>
Message-ID: <e109de27-f4af-147d-dc0e-067c8bafb29b@xenosoft.de>
Date: Thu, 13 Dec 2018 14:34:49 +0100
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Cc: linux-arch@vger.kernel.org, Darren Stevens <darren@stevens-zone.net>,
 linux-kernel@vger.kernel.org, Julian Margetson <runaway@candw.ms>,
 linux-mm@kvack.org, iommu@lists.linux-foundation.org,
 Paul Mackerras <paulus@samba.org>, Olof Johansson <olof@lixom.net>,
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On 13 December 2018 at 12:25PM, Christoph Hellwig wrote:
> On Thu, Dec 13, 2018 at 12:19:26PM +0100, Christian Zigotzky wrote:
>> I tried it again but I get the following error message:
>>
>> MODPOST vmlinux.o
>> arch/powerpc/kernel/dma-iommu.o: In function `.dma_iommu_get_required_mask':
>> (.text+0x274): undefined reference to `.dma_direct_get_required_mask'
>> make: *** [vmlinux] Error 1
> Sorry, you need this one liner before all the patches posted last time:
>
> diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
> index d8819e3a1eb1..7e78c2798f2f 100644
> --- a/arch/powerpc/Kconfig
> +++ b/arch/powerpc/Kconfig
> @@ -154,6 +154,7 @@ config PPC
>   	select CLONE_BACKWARDS
>   	select DCACHE_WORD_ACCESS		if PPC64 && CPU_LITTLE_ENDIAN
>   	select DYNAMIC_FTRACE			if FUNCTION_TRACER
> +	select DMA_DIRECT_OPS
>   	select EDAC_ATOMIC_SCRUB
>   	select EDAC_SUPPORT
>   	select GENERIC_ATOMIC64			if PPC32
>
Thanks. Result: PASEMI onboard ethernet works and the X5000 (P5020 
board) boots with the patch '0001-get_required_mask.patch'.

-- Christian