wireguard-linux/drivers/thunderbolt/retimer.c, branch update-toolchain

thunderbolt: Add receiver lane margining support for retimers

2024-06-17T09:47:12Z

Retimers support lane margining as well so make this available through debugfs in the same way as we do for the USB4 ports. When this is enabled we also expose retimers on the other side of the cable because typically margining is implemented only on direction towards the cable. However, for the retimers on the other side of the cable we do not allow NVM upgrade to avoid confusing the existing userspace (the same retimer may now appear twice with different name) and is probably not a good idea anyway. Signed-off-by: Mika Westerberg

thunderbolt: Add sideband register access to debugfs

2024-06-17T09:47:11Z

This makes it possible to read and write USB4 port and retimer sideband registers through debugfs which is useful for debugging and manufacturing purposes. We add "sb_regs" debugfs attribute under each USB4 port and retimer that is used to access the sideband. Signed-off-by: Mika Westerberg

thunderbolt: Make usb4_port_sb_read/write() available outside of usb4.c

2024-06-17T09:47:11Z

We need to call these from other files too so make them available outside of usb4.c. Signed-off-by: Mika Westerberg

thunderbolt: No need to loop over all retimers if access fails

2024-04-23T05:12:09Z

When we read the NVM authentication status or unsetting the inbound SBTX there is no point to continue the loop after first access to a retimer fails because there won't be any more retimers after this anyway so bail out from the loops early. Signed-off-by: Mika Westerberg

thunderbolt: Constify the struct device_type usage

2024-02-26T07:15:49Z

Since commit aed65af1cc2f ("drivers: make device_type const"), the driver core can properly handle constant struct device_type. Move the tb_domain_type, tb_retimer_type, tb_switch_type, usb4_port_device_type, tb_service_type and tb_xdomain_type variables to be constant structures as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman Signed-off-by: Ricardo B. Marliere Signed-off-by: Mika Westerberg

thunderbolt: Log NVM version of routers and retimers

2023-10-13T05:49:13Z

This is useful when debugging possible issues. Signed-off-by: Gil Fine Signed-off-by: Mika Westerberg

thunderbolt: Enable/disable sideband depending on USB4 port offline mode

2023-06-12T05:38:01Z

When USB4 port is in offline mode (this mean there is no device attached) we want to keep the sideband up to make it possible to communicate with the retimers. In the same way there is no need to enable sideband transactions when the USB4 port is not offline as they are already up. For this reason make the enabling/disabling depend on the USB4 port offline status. Signed-off-by: Mika Westerberg

thunderbolt: Do not send UNSET_INBOUND_SBTX when retimer NVM authentication started

2023-06-12T05:38:01Z

Once retimer NVM authentication is started, sending UNSET_INBOUND_SBTX will fail so avoid doing that. Only send it when we are writing an image with not authentication or when the authentication failed early. Signed-off-by: Mika Westerberg

thunderbolt: Read retimer NVM authentication status prior tb_retimer_set_inbound_sbtx()

2023-06-12T05:38:00Z

According to the USB4 retimer guide the correct order is immediately after sending ENUMERATE_RETIMERS so update the code to follow this. Signed-off-by: Mika Westerberg

thunderbolt: Drop retimer vendor check

2023-05-24T06:39:35Z

This is not needed anymore as we already handle unknown vendor in NVM functions. Signed-off-by: Mika Westerberg