feat(PRU-ICSS): Add Multicast+VLAN filtering documentation

Add documentation for multicast filtering for VLAN interfaces
in dual EMAC and HSR offload mode for ICSSG driver.

Signed-off-by: Meghana Malladi <[email protected]>

Author: MeghanaMalladiTI

source/linux/Foundational_Components/Kernel/Kernel_Drivers/Network/HSR_Offload.rst

@@ -115,7 +115,7 @@ All multi-cast addresses not registered will be filtered out.
 
 Multicast MAC address can be added/deleted using ip maddr commands or Linux socket ioctl SIOCADDMULTI/SIOCDELMULTI.
 
-.. rubric:: Show muliticast address
+.. rubric:: Show multicast address
 
 Show current list of multicast address for the HSR interface
 
@@ -145,7 +145,7 @@ Example:
           inet6 ff02::1
           inet6 ff01::1
 
-.. rubric:: Add muliticast address
+.. rubric:: Add multicast address
 
 Add a multicast address
 
@@ -217,7 +217,7 @@ Example: To add a multicast address and display the list in HSR and slave ports
           inet6 ff02::1 users 2
           inet6 ff01::1
 
-.. rubric:: Delete muliticast address
+.. rubric:: Delete multicast address
 
 Delete a multicast address
 
@@ -288,6 +288,46 @@ slave intefaces.
           inet6 ff02::1 users 2
           inet6 ff01::1
 
+.. rubric:: *Multicast Filtering for VLAN Interfaces*
+
+Multicast filtering for VLAN interfaces is also supported.
+
+Show current list of multicast address for the HSR VLAN interface
+
+.. code-block:: console
+
+   ip maddr show dev <hsr_vlan_intf>
+
+Example:
+
+.. code-block:: console
+
+   # ip maddr show dev hsr0.5
+
+Add multicast address for the HSR VLAN interface
+
+.. code-block:: console
+
+   ip maddr add <multicast_mac_addr> dev <hsr_vlan_intf>
+
+Example:
+
+.. code-block:: console
+
+   # ip maddr add 01:80:c4:00:00:0e dev hsr0.5
+
+Delete multicast address for the HSR VLAN interface
+
+.. code-block:: console
+
+   ip maddr del <multicast_mac_addr> dev <hsr_vlan_intf>
+
+Example:
+
+.. code-block:: console
+
+   # ip maddr del 01:80:c4:00:00:0e dev hsr0.5
+
 .. rubric:: Performance
 
 This section describes the throughput and CPU usage metrics in the offload case

source/linux/Foundational_Components/PRU-ICSS/Linux_Drivers/PRU_ICSSG_Ethernet.rst

@@ -48,6 +48,7 @@ Features supported
 - XDP Native Mode and XDP Generic Mode
 - Cut Through forwarding
 - PHY Interrupt mode for ICSSG2
+- Multicast filtering support for VLAN interfaces
 
 .. rubric:: **Features not supported**
 
@@ -498,6 +499,28 @@ socket ioctl SIOCADDMULTI/SIOCDELMULTI.
 
     # ip maddr del 01:00:5e:00:00:05 dev eth1
 
+.. rubric:: **Multicast + VLAN**
+
+Multicast MAC address can be added/deleted using *ip maddr* commands for vlan interfaces.
+
+*Show multicast address for vlan interface*
+
+.. code-block:: console
+
+   ~# ip maddr show eth1.5
+
+*Add multicast address for vlan interface*
+
+.. code-block:: console
+
+   ~# ip maddr add 01:00:5e:00:00:05 dev eth1.5
+
+*Delete multicast address for vlan interface*
+
+.. code-block:: console
+
+   ~# ip maddr del 01:00:5e:00:00:05 dev eth1.5
+
 |
 
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