tree 4cb06c58eb46b15670c98dbfa2f5160bd92f222d
parent cf29b9afb121494a7aa12dae6eebf81347e0313b
author Rajmohan Mani <rajmohan.mani@intel.com> 1576586024 +0300
committer Greg Kroah-Hartman <gregkh@linuxfoundation.org> 1576680100 +0100

thunderbolt: Add support for USB 3.x tunnels

USB4 added a capability to tunnel USB 3.x protocol over the USB4
fabric. USB4 device routers may include integrated SuperSpeed HUB or a
function or both. USB tunneling follows PCIe so that the tunnel is
created between the parent and the child router from USB3 downstream
adapter port to USB3 upstream adapter port over a single USB4 link.

This adds support for USB 3.x tunneling and also capability to discover
existing USB 3.x tunnels (for example created by connection manager in
boot firmware).

Signed-off-by: Rajmohan Mani <rajmohan.mani@intel.com>
Co-developed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20191217123345.31850-9-mika.westerberg@linux.intel.com
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>