From 227d07a07ef126272ea2eed97fd136cd7a803d81 Mon Sep 17 00:00:00 2001 From: Vladimir Oltean Date: Sun, 5 May 2019 13:19:27 +0300 Subject: net: dsa: sja1105: Add support for traffic through standalone ports In order to support this, we are creating a make-shift switch tag out of a VLAN trunk configured on the CPU port. Termination of normal traffic on switch ports only works when not under a vlan_filtering bridge. Termination of management (PTP, BPDU) traffic works under all circumstances because it uses a different tagging mechanism (incl_srcpt). We are making use of the generic CONFIG_NET_DSA_TAG_8021Q code and leveraging it from our own CONFIG_NET_DSA_TAG_SJA1105. There are two types of traffic: regular and link-local. The link-local traffic received on the CPU port is trapped from the switch's regular forwarding decisions because it matched one of the two DMAC filters for management traffic. On transmission, the switch requires special massaging for these link-local frames. Due to a weird implementation of the switching IP, by default it drops link-local frames that originate on the CPU port. It needs to be told where to forward them to, through an SPI command ("management route") that is valid for only a single frame. So when we're sending link-local traffic, we are using the dsa_defer_xmit mechanism. Signed-off-by: Vladimir Oltean Reviewed-by: Florian Fainelli Signed-off-by: David S. Miller --- net/dsa/Kconfig | 9 +++++++++ 1 file changed, 9 insertions(+) (limited to 'net/dsa/Kconfig') diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig index fc15a7e1a6df..cf855352a440 100644 --- a/net/dsa/Kconfig +++ b/net/dsa/Kconfig @@ -102,6 +102,15 @@ config NET_DSA_TAG_LAN9303 Say Y or M if you want to enable support for tagging frames for the SMSC/Microchip LAN9303 family of switches. +config NET_DSA_TAG_SJA1105 + tristate "Tag driver for NXP SJA1105 switches" + select NET_DSA_TAG_8021Q + help + Say Y or M if you want to enable support for tagging frames with the + NXP SJA1105 switch family. Both the native tagging protocol (which + is only for link-local traffic) as well as non-native tagging (based + on a custom 802.1Q VLAN header) are available. + config NET_DSA_TAG_TRAILER tristate "Tag driver for switches using a trailer tag" help -- cgit v1.2.3