From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Subject: Re: [PATCH 002/002] de2104x: support for systems lacking cache coherence From: Benjamin Herrenschmidt To: Risto Suominen In-Reply-To: <46e1c7760902120322r11cffbdcgff330a242ca586fb@mail.gmail.com> References: <46e1c7760902120322r11cffbdcgff330a242ca586fb@mail.gmail.com> Content-Type: text/plain Date: Fri, 13 Feb 2009 14:25:57 +1100 Message-Id: <1234495557.26036.0.camel@pasglop> Mime-Version: 1.0 Cc: LinuxPPC-dev@ozlabs.org List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , 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 > --- > 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