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authorVladimir Oltean <vladimir.oltean@nxp.com>2021-08-22 02:04:41 +0300
committerDavid S. Miller <davem@davemloft.net>2021-08-22 11:49:04 +0300
commit95ca38194c5aa670e54be2c4511dfaea87849d67 (patch)
tree873333a96adf1ea6d35e7019bdd536e6a409dae6 /Documentation/networking
parent37f299d98989bbac2b819eb5be97e093b817bb01 (diff)
downloadlinux-95ca38194c5aa670e54be2c4511dfaea87849d67.tar.xz
docs: net: dsa: document the new methods for bridge TX forwarding offload
Two new methods have been introduced, add some verbiage about what they do. Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation/networking')
-rw-r--r--Documentation/networking/dsa/dsa.rst16
1 files changed, 16 insertions, 0 deletions
diff --git a/Documentation/networking/dsa/dsa.rst b/Documentation/networking/dsa/dsa.rst
index b64cb4068c13..89bb4fa4c362 100644
--- a/Documentation/networking/dsa/dsa.rst
+++ b/Documentation/networking/dsa/dsa.rst
@@ -650,6 +650,22 @@ Bridge layer
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.
+- ``port_bridge_tx_fwd_offload``: bridge layer function invoked after
+ ``port_bridge_join`` when a driver sets ``ds->num_fwd_offloading_bridges`` to
+ a non-zero value. Returning success in this function activates the TX
+ forwarding offload bridge feature for this port, which enables the tagging
+ protocol driver to inject data plane packets towards the bridging domain that
+ the port is a part of. Data plane packets are subject to FDB lookup, hardware
+ learning on the CPU port, and do not override the port STP state.
+ Additionally, replication of data plane packets (multicast, flooding) is
+ handled in hardware and the bridge driver will transmit a single skb for each
+ packet that needs replication. The method is provided as a configuration
+ point for drivers that need to configure the hardware for enabling this
+ feature.
+
+- ``port_bridge_tx_fwd_unoffload``: bridge layer function invoken when a driver
+ leaves a bridge port which had the TX forwarding offload feature enabled.
+
Bridge VLAN filtering
---------------------