Hi all, This series adds a new Thunderbolt service driver that can be used on manufacturing floor to test that each Thunderbolt/USB4 port is functional. It can be done either using a special loopback dongle that has RX and TX lanes crossed, or by connecting a cable back to the host (for those who don't have these dongles). This takes advantage of the existing XDomain protocol and creates XDomain devices for the loops back to the host where the DMA traffic test driver can bind to. The DMA traffic test driver creates a tunnel through the fabric and then sends and receives data frames over the tunnel checking for different errors. The previous version can be found here: https://lore.kernel.org/linux-usb/20201104140030.6853-1-mika.westerberg@xxxxxxxxxxxxxxx/ Changes from the previous version: * Fix resource leak in tb_xdp_handle_request() (patch 2/10) * Use debugfs_remove_recursive() in tb_service_debugfs_remove() (patch 6/10) * Add tags from Yehezkel Isaac Hazan (4): thunderbolt: Add link_speed and link_width to XDomain thunderbolt: Add functions for enabling and disabling lane bonding on XDomain thunderbolt: Add DMA traffic test driver MAINTAINERS: Add Isaac as maintainer of Thunderbolt DMA traffic test driver Mika Westerberg (6): thunderbolt: Do not clear USB4 router protocol adapter IFC and ISE bits thunderbolt: Find XDomain by route instead of UUID thunderbolt: Create XDomain devices for loops back to the host thunderbolt: Create debugfs directory automatically for services thunderbolt: Make it possible to allocate one directional DMA tunnel thunderbolt: Add support for end-to-end flow control .../ABI/testing/sysfs-bus-thunderbolt | 28 + MAINTAINERS | 6 + drivers/net/thunderbolt.c | 2 +- drivers/thunderbolt/Kconfig | 13 + drivers/thunderbolt/Makefile | 3 + drivers/thunderbolt/ctl.c | 4 +- drivers/thunderbolt/debugfs.c | 24 + drivers/thunderbolt/dma_test.c | 736 ++++++++++++++++++ drivers/thunderbolt/nhi.c | 36 +- drivers/thunderbolt/path.c | 13 +- drivers/thunderbolt/switch.c | 33 +- drivers/thunderbolt/tb.h | 8 + drivers/thunderbolt/tunnel.c | 50 +- drivers/thunderbolt/xdomain.c | 148 +++- include/linux/thunderbolt.h | 18 +- 15 files changed, 1080 insertions(+), 42 deletions(-) create mode 100644 drivers/thunderbolt/dma_test.c -- 2.28.0
