From mboxrd@z Thu Jan  1 00:00:00 1970
From: Brice Goglin <Brice.Goglin@inria.fr>
Subject: Re: Should we report bus width/speed via ethtool?
Date: Wed, 05 Dec 2012 16:20:34 -0800
Message-ID: <50BFE4D2.90707@inria.fr>
References: <50BFBE05.7020408@candelatech.com> <20121205.173650.1310171220758794440.davem@davemloft.net> <50BFD417.7070306@candelatech.com> <20121205.190121.1400827550469329286.davem@davemloft.net>
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Le 05/12/2012 16:01, David Miller a =E9crit :
> 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):
  =20
https://svn.open-mpi.org/trac/hwloc/browser/trunk/src/topology-libpci.c=
#L399

Brice