Merge branch 'dsa-doc-fixups'

Vladimir Oltean says:

====================
DSA/switchdev documentation fixups

These are some small fixups after the recently merged documentation
update.
====================

Signed-off-by: David S. Miller <davem@davemloft.net>

3 files changed, 169 insertions, 165 deletions

diff --git a/Documentation/networking/dsa/configuration.rst b/Documentation/networking/dsa/configuration.rst
index 11bd5e6108c0..774f0e76c746 100644
--- a/Documentation/networking/dsa/configuration.rst
+++ b/Documentation/networking/dsa/configuration.rst
@@ -34,8 +34,15 @@ interface. The CPU port is the switch port connected to an Ethernet MAC chip.
 The corresponding linux Ethernet interface is called the master interface.
 All other corresponding linux interfaces are called slave interfaces.
 
-The slave interfaces depend on the master interface. They can only brought up,
-when the master interface is up.
+The slave interfaces depend on the master interface being up in order for them
+to send or receive traffic. Prior to kernel v5.12, the state of the master
+interface had to be managed explicitly by the user. Starting with kernel v5.12,
+the behavior is as follows:
+
+- when a DSA slave interface is brought up, the master interface is
+  automatically brought up.
+- when the master interface is brought down, all DSA slave interfaces are
+  automatically brought down.
 
 In this documentation the following Ethernet interfaces are used:
 
@@ -78,79 +85,76 @@ The tagging based configuration is desired and supported by the majority of
 DSA switches. These switches are capable to tag incoming and outgoing traffic
 without using a VLAN based configuration.
 
-single port
-~~~~~~~~~~~
-
-.. code-block:: sh
-
-  # configure each interface
-  ip addr add 192.0.2.1/30 dev lan1
-  ip addr add 192.0.2.5/30 dev lan2
-  ip addr add 192.0.2.9/30 dev lan3
-
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
+*single port*
+  .. code-block:: sh
 
-  # bring up the slave interfaces
-  ip link set lan1 up
-  ip link set lan2 up
-  ip link set lan3 up
+    # configure each interface
+    ip addr add 192.0.2.1/30 dev lan1
+    ip addr add 192.0.2.5/30 dev lan2
+    ip addr add 192.0.2.9/30 dev lan3
 
-bridge
-~~~~~~
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
 
-.. code-block:: sh
+    # bring up the slave interfaces
+    ip link set lan1 up
+    ip link set lan2 up
+    ip link set lan3 up
 
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
+*bridge*
+  .. code-block:: sh
 
-  # bring up the slave interfaces
-  ip link set lan1 up
-  ip link set lan2 up
-  ip link set lan3 up
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
 
-  # create bridge
-  ip link add name br0 type bridge
+    # bring up the slave interfaces
+    ip link set lan1 up
+    ip link set lan2 up
+    ip link set lan3 up
 
-  # add ports to bridge
-  ip link set dev lan1 master br0
-  ip link set dev lan2 master br0
-  ip link set dev lan3 master br0
+    # create bridge
+    ip link add name br0 type bridge
 
-  # configure the bridge
-  ip addr add 192.0.2.129/25 dev br0
+    # add ports to bridge
+    ip link set dev lan1 master br0
+    ip link set dev lan2 master br0
+    ip link set dev lan3 master br0
 
-  # bring up the bridge
-  ip link set dev br0 up
+    # configure the bridge
+    ip addr add 192.0.2.129/25 dev br0
 
-gateway
-~~~~~~~
+    # bring up the bridge
+    ip link set dev br0 up
 
-.. code-block:: sh
+*gateway*
+  .. code-block:: sh
 
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
 
-  # bring up the slave interfaces
-  ip link set wan up
-  ip link set lan1 up
-  ip link set lan2 up
+    # bring up the slave interfaces
+    ip link set wan up
+    ip link set lan1 up
+    ip link set lan2 up
 
-  # configure the upstream port
-  ip addr add 192.0.2.1/30 dev wan
+    # configure the upstream port
+    ip addr add 192.0.2.1/30 dev wan
 
-  # create bridge
-  ip link add name br0 type bridge
+    # create bridge
+    ip link add name br0 type bridge
 
-  # add ports to bridge
-  ip link set dev lan1 master br0
-  ip link set dev lan2 master br0
+    # add ports to bridge
+    ip link set dev lan1 master br0
+    ip link set dev lan2 master br0
 
-  # configure the bridge
-  ip addr add 192.0.2.129/25 dev br0
+    # configure the bridge
+    ip addr add 192.0.2.129/25 dev br0
 
-  # bring up the bridge
-  ip link set dev br0 up
+    # bring up the bridge
+    ip link set dev br0 up
 
 .. _dsa-vlan-configuration:
 
@@ -161,132 +165,130 @@ A minority of switches are not capable to use a taging protocol
 (DSA_TAG_PROTO_NONE). These switches can be configured by a VLAN based
 configuration.
 
-single port
-~~~~~~~~~~~
-The configuration can only be set up via VLAN tagging and bridge setup.
-
-.. code-block:: sh
-
-  # tag traffic on CPU port
-  ip link add link eth0 name eth0.1 type vlan id 1
-  ip link add link eth0 name eth0.2 type vlan id 2
-  ip link add link eth0 name eth0.3 type vlan id 3
-
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
-  ip link set eth0.1 up
-  ip link set eth0.2 up
-  ip link set eth0.3 up
-
-  # bring up the slave interfaces
-  ip link set lan1 up
-  ip link set lan2 up
-  ip link set lan3 up
-
-  # create bridge
-  ip link add name br0 type bridge
-
-  # activate VLAN filtering
-  ip link set dev br0 type bridge vlan_filtering 1
-
-  # add ports to bridges
-  ip link set dev lan1 master br0
-  ip link set dev lan2 master br0
-  ip link set dev lan3 master br0
-
-  # tag traffic on ports
-  bridge vlan add dev lan1 vid 1 pvid untagged
-  bridge vlan add dev lan2 vid 2 pvid untagged
-  bridge vlan add dev lan3 vid 3 pvid untagged
-
-  # configure the VLANs
-  ip addr add 192.0.2.1/30 dev eth0.1
-  ip addr add 192.0.2.5/30 dev eth0.2
-  ip addr add 192.0.2.9/30 dev eth0.3
-
-  # bring up the bridge devices
-  ip link set br0 up
-
+*single port*
+  The configuration can only be set up via VLAN tagging and bridge setup.
 
-bridge
-~~~~~~
+  .. code-block:: sh
 
-.. code-block:: sh
+    # tag traffic on CPU port
+    ip link add link eth0 name eth0.1 type vlan id 1
+    ip link add link eth0 name eth0.2 type vlan id 2
+    ip link add link eth0 name eth0.3 type vlan id 3
 
-  # tag traffic on CPU port
-  ip link add link eth0 name eth0.1 type vlan id 1
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
+    ip link set eth0.1 up
+    ip link set eth0.2 up
+    ip link set eth0.3 up
 
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
-  ip link set eth0.1 up
+    # bring up the slave interfaces
+    ip link set lan1 up
+    ip link set lan2 up
+    ip link set lan3 up
 
-  # bring up the slave interfaces
-  ip link set lan1 up
-  ip link set lan2 up
-  ip link set lan3 up
+    # create bridge
+    ip link add name br0 type bridge
 
-  # create bridge
-  ip link add name br0 type bridge
+    # activate VLAN filtering
+    ip link set dev br0 type bridge vlan_filtering 1
 
-  # activate VLAN filtering
-  ip link set dev br0 type bridge vlan_filtering 1
+    # add ports to bridges
+    ip link set dev lan1 master br0
+    ip link set dev lan2 master br0
+    ip link set dev lan3 master br0
 
-  # add ports to bridge
-  ip link set dev lan1 master br0
-  ip link set dev lan2 master br0
-  ip link set dev lan3 master br0
-  ip link set eth0.1 master br0
+    # tag traffic on ports
+    bridge vlan add dev lan1 vid 1 pvid untagged
+    bridge vlan add dev lan2 vid 2 pvid untagged
+    bridge vlan add dev lan3 vid 3 pvid untagged
 
-  # tag traffic on ports
-  bridge vlan add dev lan1 vid 1 pvid untagged
-  bridge vlan add dev lan2 vid 1 pvid untagged
-  bridge vlan add dev lan3 vid 1 pvid untagged
+    # configure the VLANs
+    ip addr add 192.0.2.1/30 dev eth0.1
+    ip addr add 192.0.2.5/30 dev eth0.2
+    ip addr add 192.0.2.9/30 dev eth0.3
 
-  # configure the bridge
-  ip addr add 192.0.2.129/25 dev br0
+    # bring up the bridge devices
+    ip link set br0 up
 
-  # bring up the bridge
-  ip link set dev br0 up
 
-gateway
-~~~~~~~
+*bridge*
+  .. code-block:: sh
 
-.. code-block:: sh
+    # tag traffic on CPU port
+    ip link add link eth0 name eth0.1 type vlan id 1
 
-  # tag traffic on CPU port
-  ip link add link eth0 name eth0.1 type vlan id 1
-  ip link add link eth0 name eth0.2 type vlan id 2
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
+    ip link set eth0.1 up
 
-  # The master interface needs to be brought up before the slave ports.
-  ip link set eth0 up
-  ip link set eth0.1 up
-  ip link set eth0.2 up
+    # bring up the slave interfaces
+    ip link set lan1 up
+    ip link set lan2 up
+    ip link set lan3 up
 
-  # bring up the slave interfaces
-  ip link set wan up
-  ip link set lan1 up
-  ip link set lan2 up
+    # create bridge
+    ip link add name br0 type bridge
 
-  # create bridge
-  ip link add name br0 type bridge
+    # activate VLAN filtering
+    ip link set dev br0 type bridge vlan_filtering 1
 
-  # activate VLAN filtering
-  ip link set dev br0 type bridge vlan_filtering 1
+    # add ports to bridge
+    ip link set dev lan1 master br0
+    ip link set dev lan2 master br0
+    ip link set dev lan3 master br0
+    ip link set eth0.1 master br0
 
-  # add ports to bridges
-  ip link set dev wan master br0
-  ip link set eth0.1 master br0
-  ip link set dev lan1 master br0
-  ip link set dev lan2 master br0
+    # tag traffic on ports
+    bridge vlan add dev lan1 vid 1 pvid untagged
+    bridge vlan add dev lan2 vid 1 pvid untagged
+    bridge vlan add dev lan3 vid 1 pvid untagged
 
-  # tag traffic on ports
-  bridge vlan add dev lan1 vid 1 pvid untagged
-  bridge vlan add dev lan2 vid 1 pvid untagged
-  bridge vlan add dev wan vid 2 pvid untagged
+    # configure the bridge
+    ip addr add 192.0.2.129/25 dev br0
 
-  # configure the VLANs
-  ip addr add 192.0.2.1/30 dev eth0.2
-  ip addr add 192.0.2.129/25 dev br0
+    # bring up the bridge
+    ip link set dev br0 up
 
-  # bring up the bridge devices
-  ip link set br0 up
+*gateway*
+  .. code-block:: sh
+
+    # tag traffic on CPU port
+    ip link add link eth0 name eth0.1 type vlan id 1
+    ip link add link eth0 name eth0.2 type vlan id 2
+
+    # For kernels earlier than v5.12, the master interface needs to be
+    # brought up manually before the slave ports.
+    ip link set eth0 up
+    ip link set eth0.1 up
+    ip link set eth0.2 up
+
+    # bring up the slave interfaces
+    ip link set wan up
+    ip link set lan1 up
+    ip link set lan2 up
+
+    # create bridge
+    ip link add name br0 type bridge
+
+    # activate VLAN filtering
+    ip link set dev br0 type bridge vlan_filtering 1
+
+    # add ports to bridges
+    ip link set dev wan master br0
+    ip link set eth0.1 master br0
+    ip link set dev lan1 master br0
+    ip link set dev lan2 master br0
+
+    # tag traffic on ports
+    bridge vlan add dev lan1 vid 1 pvid untagged
+    bridge vlan add dev lan2 vid 1 pvid untagged
+    bridge vlan add dev wan vid 2 pvid untagged
+
+    # configure the VLANs
+    ip addr add 192.0.2.1/30 dev eth0.2
+    ip addr add 192.0.2.129/25 dev br0
+
+    # bring up the bridge devices
+    ip link set br0 up
diff --git a/Documentation/networking/dsa/dsa.rst b/Documentation/networking/dsa/dsa.rst
index 69040e11ee5e..8688009514cc 100644
--- a/Documentation/networking/dsa/dsa.rst
+++ b/Documentation/networking/dsa/dsa.rst
@@ -464,6 +464,7 @@ For each devlink device, every physical port (i.e. user ports, CPU ports, DSA
 links or unused ports) is exposed as a devlink port.
 
 DSA drivers can make use of the following devlink features:
+
 - Regions: debugging feature which allows user space to dump driver-defined
   areas of hardware information in a low-level, binary format. Both global
   regions as well as per-port regions are supported. It is possible to export
diff --git a/Documentation/networking/switchdev.rst b/Documentation/networking/switchdev.rst
index 1b56367d85ad..f1f4e6a85a29 100644
--- a/Documentation/networking/switchdev.rst
+++ b/Documentation/networking/switchdev.rst
@@ -479,6 +479,7 @@ is not possible.
   be added to a second bridge, which includes other switch ports or software
   interfaces. Some approaches to ensure that the forwarding domain for traffic
   belonging to the VLAN upper interfaces are managed properly:
+
     * If forwarding destinations can be managed per VLAN, the hardware could be
       configured to map all traffic, except the packets tagged with a VID
       belonging to a VLAN upper interface, to an internal VID corresponding to
@@ -522,7 +523,7 @@ as untagged packets, since the bridge device does not allow the manipulation of
 VID 0 in its database.
 
 When the bridge has VLAN filtering enabled and a PVID is not configured on the
-ingress port, untagged 802.1p tagged packets must be dropped. When the bridge
+ingress port, untagged and 802.1p tagged packets must be dropped. When the bridge
 has VLAN filtering enabled and a PVID exists on the ingress port, untagged and
 priority-tagged packets must be accepted and forwarded according to the
 bridge's port membership of the PVID VLAN. When the bridge has VLAN filtering