[U-Boot] openrd_ultimate GigEth ports not working

[Prafulla Wadaskar]

> -----Original Message-----
> From: Alex Zeffertt [mailto:azeffertt at cambridgesys.com]
> Sent: Monday, August 01, 2011 1:52 PM
> To: Wolfgang Denk
> Cc: Ralph Metzler; u-boot at lists.denx.de; Prafulla Wadaskar
> Subject: Re: [U-Boot] openrd_ultimate GigEth ports not working
> 
> [Cc-ing Prafulla the author of the mvgbe driver]
> 
> Hi All,
> I contacted the author of that commit and this was his response:
> 
> > Yes, most likely it's the caching. Guess your driver is doing DMA
> andis not handling the cache flushing/invalidation well to avoid
> coherency
> > issues. First of all to confirm that this is indeed the issue you may
> > try re-compile your u-boot with CONFIG_SYS_DCACHE_OFF in your config
> > header. That should solve the problem, but the right solution will be
> > to fix your driver.
> >
> > br,
> > Aneesh
> 
> Prafulla, does this make any sense to you?

Yes, it is.
In the mainlined driver, D-cache is considered to be off.
In the subsequent patches is it enabled leading the problem.

We need to address some code to handle this or disable D-cache

Regards..
Prafulla . . .

> 
> Regards,
> 
> Alex
> 
> On 26 July 2011 13:29, Alex Zeffertt <azeffertt at cambridgesys.com> wrote:
> >
> > git bisect says:
> >
> > c2dd0d45540397704de9b13287417d21049d34c6 is the first bad commit
> > commit c2dd0d45540397704de9b13287417d21049d34c6
> > Author: Aneesh V <aneesh at ti.com>
> > Date:   Thu Jun 16 23:30:49 2011 +0000
> >     armv7: integrate cache maintenance support
> >
> >     - Enable I-cache on bootup
> >     - Enable MMU and D-cache immediately after relocation
> >     - Do necessary initialization before enabling d-cache and MMU
> >     - Changes to cleanup_before_linux()
> >     - Make changes according to the new framework
> >
> >     Signed-off-by: Aneesh V <aneesh at ti.com>
> > :040000 040000 2e80477b0d05ad168feb89ef0e00d9bbd79b0cd0
> 5505c5f890b2af6e9b54bba915fdf3368abdfb16 M arch
> >
> > Thanks,
> > Alex
> >
> > On 26 July 2011 12:09, Wolfgang Denk <wd at denx.de> wrote:
> >>
> >> Dear Alex Zeffertt,
> >>
> >> In message
> <CANNiwJKvYkei0qmRC8V5LvTar+q8CzYeTYCpqDjzV34HtCL6kQ at mail.gmail.com> you
> wrote:
> >> >
> >> > I can confirm that the issue is the same with OpenRD Ultimate.
>  I.e.
> >> > ethernet is not working in HEAD but it is fine on tag v2011.06.
> >>
> >> And what says "git bisect" ?
> >>
> >> Best regards,
> >>
> >> Wolfgang Denk
> >>
> >> --
> >> DENX Software Engineering GmbH,     MD: Wolfgang Denk & Detlev Zundel
> >> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> >> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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> >>        -- Spock, "Space Seed", stardate 3141.9
> >