Thu, Nov 19, 2020 at 09:38:34PM CET, edwin.p...@broadcom.com wrote: >On Sat, Oct 10, 2020 at 3:54 PM Ido Schimmel <ido...@idosch.org> wrote: > >> Add 'ETHTOOL_A_LINKMODES_LANES' attribute and expand 'struct >> ethtool_link_settings' with lanes field in order to implement a new >> lanes-selector that will enable the user to advertise a specific number >> of lanes as well. > >Why can't this be implied by port break-out configuration? For higher >speed signalling modes like PAM4, what's the difference between a >port with unused lanes vs the same port split into multiple logical >ports? In essence, the driver could then always choose the slowest
There is a crucial difference. Split port is configured alwasy by user. Each split port has a devlink instace, netdevice associated with it. It is one level above the lanes. >signalling mode that utilizes all the available lanes. > >Regards, >Edwin Peer
