From e6f818585713efb29d54f732f41291f75046a2c7 Mon Sep 17 00:00:00 2001 From: Rajmohan Mani Date: Tue, 17 Dec 2019 15:33:44 +0300 Subject: 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 Co-developed-by: Mika Westerberg Signed-off-by: Mika Westerberg Link: https://lore.kernel.org/r/20191217123345.31850-9-mika.westerberg@linux.intel.com Signed-off-by: Greg Kroah-Hartman --- drivers/thunderbolt/tunnel.h | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'drivers/thunderbolt/tunnel.h') diff --git a/drivers/thunderbolt/tunnel.h b/drivers/thunderbolt/tunnel.h index ba888da005f5..3f5ba93225e7 100644 --- a/drivers/thunderbolt/tunnel.h +++ b/drivers/thunderbolt/tunnel.h @@ -15,6 +15,7 @@ enum tb_tunnel_type { TB_TUNNEL_PCI, TB_TUNNEL_DP, TB_TUNNEL_DMA, + TB_TUNNEL_USB3, }; /** @@ -57,6 +58,9 @@ struct tb_tunnel *tb_tunnel_alloc_dma(struct tb *tb, struct tb_port *nhi, struct tb_port *dst, int transmit_ring, int transmit_path, int receive_ring, int receive_path); +struct tb_tunnel *tb_tunnel_discover_usb3(struct tb *tb, struct tb_port *down); +struct tb_tunnel *tb_tunnel_alloc_usb3(struct tb *tb, struct tb_port *up, + struct tb_port *down); void tb_tunnel_free(struct tb_tunnel *tunnel); int tb_tunnel_activate(struct tb_tunnel *tunnel); @@ -82,5 +86,10 @@ static inline bool tb_tunnel_is_dma(const struct tb_tunnel *tunnel) return tunnel->type == TB_TUNNEL_DMA; } +static inline bool tb_tunnel_is_usb3(const struct tb_tunnel *tunnel) +{ + return tunnel->type == TB_TUNNEL_USB3; +} + #endif -- cgit v1.2.3