linux-kernel - Re: use generic DMA mapping code in powerpc V4

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Message-ID: <58c61afb-290f-6196-c72c-ac7b61b84718@xenosoft.de>
Date:   Tue, 4 Dec 2018 10:53:39 +0100
From:   Christian Zigotzky <chzigotzky@...osoft.de>
To:     Christoph Hellwig <hch@....de>
Cc:     linux-arch@...r.kernel.org,
        Darren Stevens <darren@...vens-zone.net>,
        linux-kernel@...r.kernel.org, Julian Margetson <runaway@...dw.ms>,
        linux-mm@...ck.org, iommu@...ts.linux-foundation.org,
        Paul Mackerras <paulus@...ba.org>,
        Olof Johansson <olof@...om.net>, linuxppc-dev@...ts.ozlabs.org
Subject: Re: use generic DMA mapping code in powerpc V4

On 04 December 2018 at 08:31AM, Christian Zigotzky wrote:
> Hi All,
>
> Could you please test Christoph's kernel on your PASEMI and NXP 
> boards? Download:
>
> 'git clone git://git.infradead.org/users/hch/misc.git -b powerpc-dma.5 a'
>
> Thanks,
> Christian
>
I successfully tested this kernel on a virtual e5500 QEMU machine today.

Command: ./qemu-system-ppc64 -M ppce500 -cpu e5500 -m 2048 -kernel 
uImage-dma -drive 
format=raw,file=MATE_PowerPC_Remix_2017_0.9.img,index=0,if=virtio -nic 
user,model=e1000 -append "rw root=/dev/vda" -device virtio-vga -device 
virtio-mouse-pci -device virtio-keyboard-pci -usb -soundhw es1370 -smp 4

QEMU version 3.1.0.

I don't know why this kernel doesn't recognize the hard disks connected 
to my physical P5020 board and why the onboard ethernet on my PASEMI 
board doesn't work. (dma_direct_map_page: overflow)

-- Christian