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| author | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-01-08 14:57:19 +0200 |
|---|---|---|
| committer | Mika Westerberg <mika.westerberg@linux.intel.com> | 2021-03-18 18:25:31 +0300 |
| commit | 46b494f286812a88caba28dd0810cf3a55747431 (patch) | |
| tree | 13ca189783f360871f249c73fc261c13c153b046 /Documentation/ABI | |
| parent | 7d3084c0b77c6c417a16fc1c5bf3bc3149d20fab (diff) | |
| download | linux-46b494f286812a88caba28dd0810cf3a55747431.tar.gz linux-46b494f286812a88caba28dd0810cf3a55747431.tar.bz2 linux-46b494f286812a88caba28dd0810cf3a55747431.zip | |
thunderbolt: Add support for maxhopid XDomain property
USB4 inter-domain spec mandates that the compatible hosts expose a new
property "maxhopid" that tells the connection manager on the other side
what is the maximum supported input HopID over the connection. Since
this is depend on the lane adapter the cable is connected it needs to be
filled in dynamically.
For this reason we take a copy of the global properties and fill then
for each XDomain connection upon first connect, and then keep updating
it if the generation changes as services are being added/removed. We
also take advantage of this copy to fill in the hostname.
We also expose this maxhopid as an attribute under each XDomain device.
While there drop kernel-doc entry for property_lock which seems to be
left there when the structure was originally introduced.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Diffstat (limited to 'Documentation/ABI')
| -rw-r--r-- | Documentation/ABI/testing/sysfs-bus-thunderbolt | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/Documentation/ABI/testing/sysfs-bus-thunderbolt b/Documentation/ABI/testing/sysfs-bus-thunderbolt index bfa4ca6f3fc1..c41c68f64693 100644 --- a/Documentation/ABI/testing/sysfs-bus-thunderbolt +++ b/Documentation/ABI/testing/sysfs-bus-thunderbolt @@ -134,6 +134,13 @@ Contact: thunderbolt-software@lists.01.org Description: This attribute contains name of this device extracted from the device DROM. +What: /sys/bus/thunderbolt/devices/.../maxhopid +Date: Jul 2021 +KernelVersion: 5.13 +Contact: Mika Westerberg <mika.westerberg@linux.intel.com> +Description: Only set for XDomains. The maximum HopID the other host + supports as its input HopID. + What: /sys/bus/thunderbolt/devices/.../rx_speed Date: Jan 2020 KernelVersion: 5.5 |