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authorVladimir Oltean2021-01-29 03:00:08 +0200
committerJakub Kicinski2021-01-29 21:25:27 -0800
commit7c83a7c539abe9f980996063ac20532a7a7f6eb1 (patch)
tree70332869950333e9f5e4f5030bd05954b41410d8 /net/dsa/Kconfig
parentadb3dccf090bc53ce177cd30bbe5b985336a6f66 (diff)
net: dsa: add a second tagger for Ocelot switches based on tag_8021q
There are use cases for which the existing tagger, based on the NPI (Node Processor Interface) functionality, is insufficient. Namely: - Frames injected through the NPI port bypass the frame analyzer, so no source address learning is performed, no TSN stream classification, etc. - Flow control is not functional over an NPI port (PAUSE frames are encapsulated in the same Extraction Frame Header as all other frames) - There can be at most one NPI port configured for an Ocelot switch. But in NXP LS1028A and T1040 there are two Ethernet CPU ports. The non-NPI port is currently either disabled, or operated as a plain user port (albeit an internally-facing one). Having the ability to configure the two CPU ports symmetrically could pave the way for e.g. creating a LAG between them, to increase bandwidth seamlessly for the system. So there is a desire to have an alternative to the NPI mode. This change keeps the default tagger for the Seville and Felix switches as "ocelot", but it can be changed via the following device attribute: echo ocelot-8021q > /sys/class/<dsa-master>/dsa/tagging Signed-off-by: Vladimir Oltean <vladimir.oltean@nxp.com> Reviewed-by: Florian Fainelli <f.fainelli@gmail.com> Signed-off-by: Jakub Kicinski <kuba@kernel.org>
Diffstat (limited to 'net/dsa/Kconfig')
-rw-r--r--net/dsa/Kconfig21
1 files changed, 18 insertions, 3 deletions
diff --git a/net/dsa/Kconfig b/net/dsa/Kconfig
index 2d226a5c085f..a45572cfb71a 100644
--- a/net/dsa/Kconfig
+++ b/net/dsa/Kconfig
@@ -105,11 +105,26 @@ config NET_DSA_TAG_RTL4_A
the Realtek RTL8366RB.
config NET_DSA_TAG_OCELOT
- tristate "Tag driver for Ocelot family of switches"
+ tristate "Tag driver for Ocelot family of switches, using NPI port"
select PACKING
help
- Say Y or M if you want to enable support for tagging frames for the
- Ocelot switches (VSC7511, VSC7512, VSC7513, VSC7514, VSC9959).
+ Say Y or M if you want to enable NPI tagging for the Ocelot switches
+ (VSC7511, VSC7512, VSC7513, VSC7514, VSC9953, VSC9959). In this mode,
+ the frames over the Ethernet CPU port are prepended with a
+ hardware-defined injection/extraction frame header. Flow control
+ (PAUSE frames) over the CPU port is not supported when operating in
+ this mode.
+
+config NET_DSA_TAG_OCELOT_8021Q
+ tristate "Tag driver for Ocelot family of switches, using VLAN"
+ select NET_DSA_TAG_8021Q
+ help
+ Say Y or M if you want to enable support for tagging frames with a
+ custom VLAN-based header. Frames that require timestamping, such as
+ PTP, are not delivered over Ethernet but over register-based MMIO.
+ Flow control over the CPU port is functional in this mode. When using
+ this mode, less TCAM resources (VCAP IS1, IS2, ES0) are available for
+ use with tc-flower.
config NET_DSA_TAG_QCA
tristate "Tag driver for Qualcomm Atheros QCA8K switches"