From: Benjamin Herrenschmidt <benh@kernel.crashing.org>
To: Risto Suominen <risto.suominen@gmail.com>
Cc: LinuxPPC-dev@ozlabs.org
Subject: Re: [PATCH 002/002] de2104x: support for systems lacking cache coherence
Date: Fri, 13 Feb 2009 14:25:57 +1100 [thread overview]
Message-ID: <1234495557.26036.0.camel@pasglop> (raw)
In-Reply-To: <46e1c7760902120322r11cffbdcgff330a242ca586fb@mail.gmail.com>
On Thu, 2009-02-12 at 13:22 +0200, Risto Suominen wrote:
> Here is a patch that helped me to get my de2104x NIC working on my
> PowerMac 5500. As an interesting side effect, it also made my mesh
> module crash.
>
> Background can be found here: http://www.spinics.net/lists/netdev/msg88488.html
I'll catch up with the discussion in netdev, I think the workaround
should be in the driver... Or if not, we can do special dma-ops just for
that device.
Just to make sure I didn't miss something, please send me a tarball
of /proc/device-tree of your machine.
Cheers,
Ben.
> Risto
>
> Allow setting NOT_COHERENT_CACHE explicitly.
>
> Signed-off-by: Risto Suominen <Risto.Suominen@gmail.com>
> ---
> The testing is done on kernel version 2.6.24.
>
> --- a/arch/powerpc/platforms/powermac/Kconfig.org 2008-01-25
> 00:58:37.000000000 +0200
> +++ b/arch/powerpc/platforms/powermac/Kconfig 2009-02-10
> 17:44:24.000000000 +0200
> @@ -18,4 +18,10 @@ config PPC_PMAC64
> select PPC_970_NAP
> default y
>
> -
> +config NOT_COHERENT_CACHE
> + bool "Incoherent cache"
> + default n
> + help
> + Setting this option may be necessary for avoiding cache-related
> + problems with some network cards on some platforms. An example is
> + 2104x and PowerMac 5500.
> _______________________________________________
> Linuxppc-dev mailing list
> Linuxppc-dev@ozlabs.org
> https://ozlabs.org/mailman/listinfo/linuxppc-dev
next prev parent reply other threads:[~2009-02-13 3:25 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-02-12 11:22 [PATCH 002/002] de2104x: support for systems lacking cache coherence Risto Suominen
2009-02-13 3:25 ` Benjamin Herrenschmidt [this message]
2009-02-13 3:26 ` Benjamin Herrenschmidt
2009-02-13 15:58 ` Risto Suominen
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=1234495557.26036.0.camel@pasglop \
--to=benh@kernel.crashing.org \
--cc=LinuxPPC-dev@ozlabs.org \
--cc=risto.suominen@gmail.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).