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| author |   Vladimir Oltean <vladimir.oltean@nxp.com> | 2021-01-29 03:00:08 +0200 |
|---|---|---|
| committer |   Jakub Kicinski <kuba@kernel.org> | 2021-01-29 21:25:27 -0800 |
| commit | 7c83a7c539abe9f980996063ac20532a7a7f6eb1 (patch) | |
| tree | 70332869950333e9f5e4f5030bd05954b41410d8 /MAINTAINERS | |
| parent | net: dsa: felix: convert to the new .change_tag_protocol DSA API (diff) | |
| download | linux-dev-7c83a7c539abe9f980996063ac20532a7a7f6eb1.tar.xz linux-dev-7c83a7c539abe9f980996063ac20532a7a7f6eb1.zip | |
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 'MAINTAINERS')
| -rw-r--r-- | MAINTAINERS | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/MAINTAINERS b/MAINTAINERS index 627e90a9e296..d1b0057a9797 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -12859,6 +12859,7 @@ F: drivers/net/dsa/ocelot/* F: drivers/net/ethernet/mscc/ F: include/soc/mscc/ocelot* F: net/dsa/tag_ocelot.c +F: net/dsa/tag_ocelot_8021q.c F: tools/testing/selftests/drivers/net/ocelot/* OCXL (Open Coherent Accelerator Processor Interface OpenCAPI) DRIVER |