kernel/linux.git/drivers/thunderbolt/path.c, branch v6.6.132

thunderbolt: Introduce tb_path_deactivate_hop()

2024-04-27T15:11:35+00:00

commit b35c1d7b11da8c08b14147bbe87c2c92f7a83f8b upstream. This function can be used to clear path config space of an adapter. Make it available for other files in this driver. Signed-off-by: Sanath S Signed-off-by: Mika Westerberg Cc: Mario Limonciello Signed-off-by: Greg Kroah-Hartman

thunderbolt: Dump path config space entries during discovery

2022-04-19T07:26:13+00:00

This is useful when debugging possible issues during tunnel discovery. Signed-off-by: Mika Westerberg Tested-by: Brad Campbell

thunderbolt: Tear down existing tunnels when resuming from hibernate

2021-12-07T12:18:33+00:00

If the boot firmware implements connection manager of its own it may not create the paths in the same way or order we do. For example it may create first PCIe tunnel and then USB3 tunnel. When we restore our tunnels (first de-activating them) we may be doing that over completely different tunnels and that leaves them possibly non-functional. For this reason we re-use the tunnel discovery functionality and find out all the existing tunnels, and tear them down. Once that is done we can restore our tunnels. Signed-off-by: Mika Westerberg

thunderbolt: Move nfc_credits field to struct tb_path_hop

2021-06-01T07:48:59+00:00

With the USB4 buffer allocation the number of credits (and non-flow credits) may be different depending on the router buffer allocation preferences. To allow this move the nfc_credits field to struct tb_path_hop. Signed-off-by: Mika Westerberg

thunderbolt: path: Fix kernel-doc descriptions of non-static functions

2021-02-04T07:38:37+00:00

Fix kernel-doc descriptions of the two non-static functions. This also gets rid of the warnings on W=1 build. Reported-by: Lee Jones Signed-off-by: Mika Westerberg Reviewed-by: Lee Jones

thunderbolt: Log adapter numbers in decimal in path activation/deactivation

2020-11-30T11:39:23+00:00

This makes it consistent with other debug logs that already are using decimal number for adapters (ports). Signed-off-by: Mika Westerberg

thunderbolt: Do not clear USB4 router protocol adapter IFC and ISE bits

2020-11-11T07:20:15+00:00

These fields are marked as vendor defined in the USB4 spec and should not be modified by the software, so only clear them when we are dealing with pre-USB4 hardware. Signed-off-by: Mika Westerberg Acked-by: Yehezkel Bernat Reviewed-by: Greg Kroah-Hartman

thunderbolt: Add USB3 bandwidth management

2020-06-22T16:58:20+00:00

USB3 supports both isochronous and non-isochronous traffic. The former requires guaranteed bandwidth and can take up to 90% of the total bandwidth. With USB4 USB3 is tunneled over USB4 fabric which means that we need to make sure there is enough bandwidth allocated for the USB3 tunnels in addition to DisplayPort tunnels. Whereas DisplayPort bandwidth management is static and done before the DP tunnel is established, the USB3 bandwidth management is dynamic and allows increasing and decreasing the allocated bandwidth according to what is currently consumed. This is done through host router USB3 downstream adapter registers. This adds USB3 bandwidth management to the software connection manager so that we always try to allocate maximum bandwidth for DP tunnels and what is left is allocated for USB3. Signed-off-by: Mika Westerberg

thunderbolt: Check that both ports are reachable when allocating path

2020-06-22T16:58:19+00:00

Add sanity check that given src and dst ports are reachable through path walk before allocating a path. If they are not then bail out early. Signed-off-by: Mika Westerberg

thunderbolt: Make tb_path_alloc() work with tree topologies

2020-06-22T16:58:19+00:00

With USB4, topologies are not limited to daisy-chains anymore so when calculating how many hops are between two ports we need to walk the whole path instead. Add helper function tb_for_each_port_on_path() that can be used to walk over each port on a path and make tb_path_alloc() to use it. Signed-off-by: Mika Westerberg