netdev - Re: Marvell 88E8056 gigabit ethernet controller

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Date:	Sun, 19 Aug 2007 09:32:21 -0700
From:	Stephen Hemminger <shemminger@...ux-foundation.org>
To:	Kevin E <kevin360@...oo.com>
Cc:	Willy Tarreau <w@....eu>, linux-kernel@...r.kernel.org,
	netdev@...r.kernel.org
Subject: Re: Marvell 88E8056 gigabit ethernet controller

On Sat, 18 Aug 2007 06:59:08 -0700 (PDT)
Kevin E <kevin360@...oo.com> wrote:

> --- Willy Tarreau <w@....eu> wrote:
> 
> > OK, in this trace, both controllers are on the same
> > bus. The broken
> > one has 'Capabilities: [100] Advanced Error
> > Reporting' the other
> > does not have, and the bridge to this bus has two
> > more capabilities :
> > 'Capabilities: [100] Virtual Channel' and
> > 'Capabilities: [180] Unknown (5)'.
> > 
> > I don't know whether it can jutify a different
> > behaviour. Also, maybe this
> > is caused by a minuscule difference in the BIOS
> > setup ?
> 

The working board has a different version of the Marvell chip:

$ grep Marvell working-MB 
04:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 14)
$ grep Marvell broken-MB 
04:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 12)

Not sure if that completely explains the problem because the broken chip on my
system is:
06:00.0 Ethernet controller: Marvell Technology Group Ltd. 88E8056 PCI-E Gigabit Ethernet Controller (rev 14)

I don't know what the differences are between versions.
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