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Date:	Wed, 05 Dec 2012 16:20:34 -0800
From:	Brice Goglin <Brice.Goglin@...ia.fr>
To:	greearb@...delatech.com
CC:	netdev@...r.kernel.org, e1000-devel@...ts.sourceforge.net
Subject: Re: Should we report bus width/speed via ethtool?

Le 05/12/2012 16:01, David Miller a écrit :
> lspci might be a good place to figure this out :-) It's probably
> grovelling around in PCI config space to determine these things.

Right, it looks from PCI_EXP_LNKSTA in the config space (only works as
root). Here's how we do the same in hwloc (using the pciutils lib
underneath):
   
https://svn.open-mpi.org/trac/hwloc/browser/trunk/src/topology-libpci.c#L399

Brice

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