diff options
Diffstat (limited to 'Documentation/networking/device_drivers/ethernet/ti/am65_nuss_cpsw_switchdev.rst')
| -rw-r--r-- | Documentation/networking/device_drivers/ethernet/ti/am65_nuss_cpsw_switchdev.rst | 143 |
1 files changed, 143 insertions, 0 deletions
diff --git a/Documentation/networking/device_drivers/ethernet/ti/am65_nuss_cpsw_switchdev.rst b/Documentation/networking/device_drivers/ethernet/ti/am65_nuss_cpsw_switchdev.rst new file mode 100644 index 000000000000..25fd9aa284e2 --- /dev/null +++ b/Documentation/networking/device_drivers/ethernet/ti/am65_nuss_cpsw_switchdev.rst @@ -0,0 +1,143 @@ +.. SPDX-License-Identifier: GPL-2.0 + +=================================================================== +Texas Instruments K3 AM65 CPSW NUSS switchdev based ethernet driver +=================================================================== + +:Version: 1.0 + +Port renaming +============= + +In order to rename via udev:: + + ip -d link show dev sw0p1 | grep switchid + + SUBSYSTEM=="net", ACTION=="add", ATTR{phys_switch_id}==<switchid>, \ + ATTR{phys_port_name}!="", NAME="sw0$attr{phys_port_name}" + + +Multi mac mode +============== + +- The driver is operating in multi-mac mode by default, thus + working as N individual network interfaces. + +Devlink configuration parameters +================================ + +See Documentation/networking/devlink/am65-nuss-cpsw-switch.rst + +Enabling "switch" +================= + +The Switch mode can be enabled by configuring devlink driver parameter +"switch_mode" to 1/true:: + + devlink dev param set platform/c000000.ethernet \ + name switch_mode value true cmode runtime + +This can be done regardless of the state of Port's netdev devices - UP/DOWN, but +Port's netdev devices have to be in UP before joining to the bridge to avoid +overwriting of bridge configuration as CPSW switch driver completely reloads its +configuration when first port changes its state to UP. + +When the both interfaces joined the bridge - CPSW switch driver will enable +marking packets with offload_fwd_mark flag. + +All configuration is implemented via switchdev API. + +Bridge setup +============ + +:: + + devlink dev param set platform/c000000.ethernet \ + name switch_mode value true cmode runtime + + ip link add name br0 type bridge + ip link set dev br0 type bridge ageing_time 1000 + ip link set dev sw0p1 up + ip link set dev sw0p2 up + ip link set dev sw0p1 master br0 + ip link set dev sw0p2 master br0 + + [*] bridge vlan add dev br0 vid 1 pvid untagged self + + [*] if vlan_filtering=1. where default_pvid=1 + + Note. Steps [*] are mandatory. + + +On/off STP +========== + +:: + + ip link set dev BRDEV type bridge stp_state 1/0 + +VLAN configuration +================== + +:: + + bridge vlan add dev br0 vid 1 pvid untagged self <---- add cpu port to VLAN 1 + +Note. This step is mandatory for bridge/default_pvid. + +Add extra VLANs +=============== + + 1. untagged:: + + bridge vlan add dev sw0p1 vid 100 pvid untagged master + bridge vlan add dev sw0p2 vid 100 pvid untagged master + bridge vlan add dev br0 vid 100 pvid untagged self <---- Add cpu port to VLAN100 + + 2. tagged:: + + bridge vlan add dev sw0p1 vid 100 master + bridge vlan add dev sw0p2 vid 100 master + bridge vlan add dev br0 vid 100 pvid tagged self <---- Add cpu port to VLAN100 + +FDBs +---- + +FDBs are automatically added on the appropriate switch port upon detection + +Manually adding FDBs:: + + bridge fdb add aa:bb:cc:dd:ee:ff dev sw0p1 master vlan 100 + bridge fdb add aa:bb:cc:dd:ee:fe dev sw0p2 master <---- Add on all VLANs + +MDBs +---- + +MDBs are automatically added on the appropriate switch port upon detection + +Manually adding MDBs:: + + bridge mdb add dev br0 port sw0p1 grp 239.1.1.1 permanent vid 100 + bridge mdb add dev br0 port sw0p1 grp 239.1.1.1 permanent <---- Add on all VLANs + +Multicast flooding +================== +CPU port mcast_flooding is always on + +Turning flooding on/off on switch ports: +bridge link set dev sw0p1 mcast_flood on/off + +Access and Trunk port +===================== + +:: + + bridge vlan add dev sw0p1 vid 100 pvid untagged master + bridge vlan add dev sw0p2 vid 100 master + + + bridge vlan add dev br0 vid 100 self + ip link add link br0 name br0.100 type vlan id 100 + +Note. Setting PVID on Bridge device itself works only for +default VLAN (default_pvid). |