Thanks, Bjorn! This worked for me. Is there a way that "lspci -vvvnn" will return only info about a given bdf (like 0000:02:00.0, which is what ethtool -i eth4 returns in the "bus-info" field. Regards, Kevin On Tue, Jun 14, 2016 at 4:06 PM, Bjørn Mork <bjorn@xxxxxxx> wrote: > Kevin Wilson <wkevils@xxxxxxxxx> writes: > >> Hi all, >> Is there a way to find out whether a PCI device in a given Linux >> machine is x1, x4, x8 or x16, in terms >> of physical dimensions (without opening the box...) > > Sure. Use something like "lspci -vvvnn" and check out LnkCap and LnkSta > under Capabilities. There you can see both the number of channels and > symbol rate. > > For example for an x8 card in an x4 slot (connection-wise - the > connector is of course wider or the x8 card wouldn't fit): > > LnkCap: Port #0, Speed 5GT/s, Width x8, ASPM L0s, Exit Latency L0s <512ns, L1 <4us > LnkSta: Speed 2.5GT/s, Width x4, TrErr- Train- SlotClk+ DLActive- BWMgmt- ABWMgmt- > > > Bjørn _______________________________________________ Kernelnewbies mailing list Kernelnewbies@xxxxxxxxxxxxxxxxx http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies
