diff options
author | 2017-11-02 10:20:58 +0100 | |
---|---|---|
committer | 2017-11-02 20:31:23 +0900 | |
commit | b35be415499ad257954813f8def9c84f49f1ff34 (patch) | |
tree | a8bb9c1a5c06ee16c4c4c7422d79a9613d8509e7 /Documentation | |
parent | Merge branch 'nfp-TC-block-fixes-app-fallback-and-dev_alloc' (diff) | |
download | linux-b35be415499ad257954813f8def9c84f49f1ff34.tar.gz linux-b35be415499ad257954813f8def9c84f49f1ff34.tar.bz2 linux-b35be415499ad257954813f8def9c84f49f1ff34.zip |
net: dsa: lan9303: Added Documentation/networking/dsa/lan9303.txt
Provide a rough overview of the state of the driver. And explain that the
driver operates in two modes: bridged and port-separated.
Signed-off-by: Egil Hjelmeland <egil.hjelmeland@zenitel.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'Documentation')
-rw-r--r-- | Documentation/networking/dsa/lan9303.txt | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/Documentation/networking/dsa/lan9303.txt b/Documentation/networking/dsa/lan9303.txt new file mode 100644 index 000000000000..ec28683d107d --- /dev/null +++ b/Documentation/networking/dsa/lan9303.txt @@ -0,0 +1,37 @@ +LAN9303 Ethernet switch driver +============================== + +The LAN9303 is a three port 10/100 ethernet switch with integrated phys for the +two external ethernet ports. The third port is an RMII/MII interface to a host +master network interface (e.g. fixed link). + + +Driver details +============== + +The driver is implemented as a DSA driver, see +Documentation/networking/dsa/dsa.txt. + +See Documentation/devicetree/bindings/net/dsa/lan9303.txt for device tree +binding. + +The LAN9303 can be managed both via MDIO and I2C, both supported by this driver. + +At startup the driver configures the device to provide two separate network +interfaces (which is the default state of a DSA device). Due to HW limitations, +no HW MAC learning takes place in this mode. + +When both user ports are joined to the same bridge, the normal HW MAC learning +is enabled. This means that unicast traffic is forwarded in HW. Broadcast and +multicast is flooded in HW. STP is also supported in this mode. The driver +support fdb/mdb operations as well, meaning IGMP snooping is supported. + +If one of the user ports leave the bridge, the ports goes back to the initial +separated operation. + + +Driver limitations +================== + + - Support for VLAN filtering is not implemented + - The HW does not support VLAN-specific fdb entries |