Message-ID: <CAJGZr0JFY9ene2iW8CGhWUwARC_TvJg9NCxy7MHdH+moVOjz0g@mail.gmail.com>
Date:   Fri, 18 Oct 2019 11:42:28 +0300
From:   Maxim Uvarov <muvarov@...il.com>
To:     Stephen Hemminger <stephen@...workplumber.org>
Cc:     Madalin Bucur <madalin.bucur@....com>,
        netdev <netdev@...r.kernel.org>
Subject: Re: Fw: [Bug 205215] New: Amiga X5000 Cyrus board DPAA network driver issue

чт, 17 окт. 2019 г. в 20:27, Stephen Hemminger <stephen@...workplumber.org>:
>
>
>
> Begin forwarded message:
>
> Date: Wed, 16 Oct 2019 18:57:44 +0000
> From: bugzilla-daemon@...zilla.kernel.org
> To: stephen@...workplumber.org
> Subject: [Bug 205215] New: Amiga X5000 Cyrus board DPAA network driver issue
>
>
> https://bugzilla.kernel.org/show_bug.cgi?id=205215
>
>             Bug ID: 205215
>            Summary: Amiga X5000 Cyrus board DPAA network driver issue
>            Product: Networking
>            Version: 2.5
>     Kernel Version: 5.4
>           Hardware: PPC-32
>                 OS: Linux
>               Tree: Mainline
>             Status: NEW
>           Severity: normal
>           Priority: P1
>          Component: IPV4
>           Assignee: stephen@...workplumber.org
>           Reporter: madskateman@...il.com
>         Regression: No
>
> Hi all,
>
> It might or might not be a bug, but help would be very welcome.
>
> Me and all other AmigaOne X5000 users (Cyrus mainboard with Freescale P5020
> cpu) are not able to use the DPAA onboard Ethernet adapter with the linux
> kernels since the last two years (AFAIK)
> (link to the board: http://wiki.amiga.org/index.php?title=X5000 )
>
> So what is happening,
>
> First of all the hardware is functional. When using AmigaOS4.1FE the Ethernet
> adapter is fine. When using the adapter within U-boot (ping for example) it is
> also working as expected.
>
> When booted into linux the ethernet adapter does not get up.
> The output of DMESG is:
>
> skateman@...00LNX:~$ dmesg | grep eth
> [ 4.740603] fsl_dpaa_mac ffe4e6000.ethernet: FMan dTSEC version: 0x08240101
> [ 4.741026] fsl_dpaa_mac ffe4e6000.ethernet: FMan MAC address:
> 00:04:a3:6b:41:7c
> [ 4.741387] fsl_dpaa_mac ffe4e8000.ethernet: FMan dTSEC version: 0x08240101
> [ 4.741740] fsl_dpaa_mac ffe4e8000.ethernet: FMan MAC address:
> 00:1e:c0:f8:31:b5
> [ 4.742001] fsl_dpaa_mac ffe4e0000.ethernet:
> of_get_mac_address(/soc@...000000/fman@...000/ethernet@...00) failed

sound like mac is missing in dt.

> [ 4.742203] fsl_dpaa_mac: probe of ffe4e0000.ethernet failed with error -22
> [ 4.742382] fsl_dpaa_mac ffe4e2000.ethernet:
> of_get_mac_address(/soc@...000000/fman@...000/ethernet@...00) failed
> [ 4.742568] fsl_dpaa_mac: probe of ffe4e2000.ethernet failed with error -22
> [ 4.742749] fsl_dpaa_mac ffe4e4000.ethernet:
> of_get_mac_address(/soc@...000000/fman@...000/ethernet@...00) failed
> [ 4.747328] fsl_dpaa_mac: probe of ffe4e4000.ethernet failed with error -22
> [ 4.751918] fsl_dpaa_mac ffe4f0000.ethernet:
> of_get_mac_address(/soc@...000000/fman@...000/ethernet@...00) failed
> [ 4.756660] fsl_dpaa_mac: probe of ffe4f0000.ethernet failed with error -22
> [ 4.763988] fsl_dpaa_mac ffe4e6000.ethernet eth0: Probed interface eth0
> [ 4.771622] fsl_dpaa_mac ffe4e8000.ethernet eth1: Probed interface eth1
>
> There has been already spend time and effort but the issues still remains..
> (
> http://linuxppc.10917.n7.nabble.com/DPAA-Ethernet-traffice-troubles-with-Linux-kernel-td132277.html
> )
>
> I might have found something that could point into the right direction.
>
> The last few days regarding another issue i stumbled upon this post from Russel
> King. It had to do with coherent DMA
> (http://forum.hyperion-entertainment.com/viewtopic.php?f=58&t=4349&start=70)
>
> "Hmm, so it looks like PowerPC doesn't mark devices that are dma
> coherent with a property that describes them as such.
>
> I think this opens a wider question - what should of_dma_is_coherent()
> return for PowerPC? It seems right now that it returns false for
> devices that are DMA coherent, which seems to me to be a recipe for
> future mistakes.
>
> Any ideas from the PPC maintainers?"
>
> I started to dig around regarding DPAA ethernet and Coherent DMA and stumbled
> upon this document.
>
> http://cache.freescale.com/files/training/doc/ftf/2014/FTF-NET-F0246.pdf
>
> In this troubleshooting document similar issues and errors are being shown with
> possible troubleshooting steps.
>
> It would be great if someone could point us into the right direction and has a
> clue what could be changed within the kernel to get the Ethernet adapter
> working.
>
> Dave
>
> --
> You are receiving this mail because:
> You are the assignee for the bug.



-- 
Best regards,
Maxim Uvarov

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