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[v2,net-next,06/12] Documentation: networking: dsa: document the port_bridge_flags method

Message ID 20210316112419.1304230-7-olteanv@gmail.com (mailing list archive)
State Accepted
Commit 5a275f4c2989f6f1fab626c61d34001f28381a18
Delegated to: Netdev Maintainers
Headers show
Series Documentation updates for switchdev and DSA | expand

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Commit Message

Vladimir Oltean March 16, 2021, 11:24 a.m. UTC 
From: Vladimir Oltean <vladimir.oltean@nxp.com>

The documentation was already lagging behind by not mentioning the old
version of port_bridge_flags (port_set_egress_floods). So now we are
skipping one step and just explaining how a DSA driver should configure
address learning and flooding settings.

Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
---
 Documentation/networking/dsa/dsa.rst | 11 +++++++++++
 1 file changed, 11 insertions(+)
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Patch

diff --git a/Documentation/networking/dsa/dsa.rst b/Documentation/networking/dsa/dsa.rst
index b90a852e5329..9c287dfd3c45 100644
--- a/Documentation/networking/dsa/dsa.rst
+++ b/Documentation/networking/dsa/dsa.rst
@@ -619,6 +619,17 @@  Bridge layer
   computing a STP state change based on current and asked parameters and perform
   the relevant ageing based on the intersection results
 
+- ``port_bridge_flags``: bridge layer function invoked when a port must
+  configure its settings for e.g. flooding of unknown traffic or source address
+  learning. The switch driver is responsible for initial setup of the
+  standalone ports with address learning disabled and egress flooding of all
+  types of traffic, then the DSA core notifies of any change to the bridge port
+  flags when the port joins and leaves a bridge. DSA does not currently manage
+  the bridge port flags for the CPU port. The assumption is that address
+  learning should be statically enabled (if supported by the hardware) on the
+  CPU port, and flooding towards the CPU port should also be enabled, due to a
+  lack of an explicit address filtering mechanism in the DSA core.
+
 Bridge VLAN filtering
 ---------------------