diff options
| author | Rajmohan Mani <rajmohan.mani@intel.com> | 2019-12-17 15:33:44 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-12-18 15:41:40 +0100 |
| commit | e6f818585713efb29d54f732f41291f75046a2c7 (patch) | |
| tree | 4cb06c58eb46b15670c98dbfa2f5160bd92f222d /drivers/thunderbolt/tunnel.h | |
| parent | cf29b9afb121494a7aa12dae6eebf81347e0313b (diff) | |
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>
Diffstat (limited to 'drivers/thunderbolt/tunnel.h')
| -rw-r--r-- | drivers/thunderbolt/tunnel.h | 9 |
1 files changed, 9 insertions, 0 deletions
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 |