On Tue, Dec 17, 2019 at 03:33:36PM +0300, Mika Westerberg wrote: > Hi all, > > USB4 is the public specification of Thunderbolt 3 protocol and can be > downloaded here: > > https://www.usb.org/sites/default/files/USB4%20Specification_1.zip > > USB4 is about tunneling different protocols over a single cable (in the > same way as Thunderbolt). The current USB4 spec supports PCIe, Display Port > and USB 3.x, and also software based protocols such as networking between > domains (hosts). > > So far PCs have been using firmware based Connection Manager (FW CM, ICM) > and Apple systems have been using software based one (SW CM, ECM). A > Connection Manager is the entity that handles creation of different tunnel > types through the USB4 (and Thunderbolt) fabric. With USB4 the plan is to > have software based Connection Manager everywhere but some early systems > will come with firmware based connection manager. > > Current Linux Thunderbolt driver supports both "modes" and can detect which > one to use dynamically. > > This series extends the Linux Thunderbolt driver to support USB4 compliant > hosts and devices (this applies to both firmware and software based > connection managers). USB4 Features enabled by this series include: > > - PCIe tunneling > - Display Port tunneling > - USB 3.x tunneling > - P2P networking (implemented in drivers/net/thunderbolt.c) > - Host and device NVM firmware upgrade > > Power management support is still work in progress. It will be submitted > later on once properly tested. > > The previous versions of the series can be seen here: > > v1: https://lore.kernel.org/linux-usb/20191023112154.64235-1-mika.westerberg@xxxxxxxxxxxxxxx/ > RFC: https://lore.kernel.org/lkml/20191001113830.13028-1-mika.westerberg@xxxxxxxxxxxxxxx/ > > Changes from v1: > > * Rebased on top of v5.5-rc2. > * Add a new patch to populate PG field in hotplug ack packet. > * Rename the networking driver Kconfig symbol to CONFIG_USB4_NET to > follow the driver itself (CONFIG_USB4). At a quick glance, this looks nice and sane, good job. I've taken all of these into my tree, let's see if 0-day has any problems with it :) thanks, greg k-h
