• Mika Westerberg's avatar
    thunderbolt: Add support for lane bonding · 91c0c120
    Mika Westerberg authored
    Lane bonding allows aggregating two 10/20 Gb/s (depending on the
    generation) lanes into a single 20/40 Gb/s bonded link. This allows
    sharing the full bandwidth more efficiently. In order to establish lane
    bonding we need to check that lane bonding is possible through link
    controller and that both ends of the link actually supports 2x widths.
    This also means that all the paths should be established through the
    primary port so update tb_path_alloc() to handle this as well.
    
    Lane bonding is supported starting from Falcon Ridge (2nd generation)
    controllers.
    
    We also expose the current speed and number of lanes under each device
    except the host router following similar attribute naming than USB bus.
    Expose speed and number of lanes for both directions to allow possibility
    of asymmetric link in the future.
    Signed-off-by: default avatarMika Westerberg <mika.westerberg@linux.intel.com>
    91c0c120
sysfs-bus-thunderbolt 8.72 KB