David S. Miller 97aeb877de Merge branch '100GbE' of git://git.kernel.org/pub/scm/linux/kernel/git/tnguy/next-queue
Tony Nguyen says:

====================
ice: GTP support in switchdev

Marcin Szycik says:

Add support for adding GTP-C and GTP-U filters in switchdev mode.

To create a filter for GTP, create a GTP-type netdev with ip tool, enable
hardware offload, add qdisc and add a filter in tc:

ip link add $GTP0 type gtp role <sgsn/ggsn> hsize <hsize>
ethtool -K $PF0 hw-tc-offload on
tc qdisc add dev $GTP0 ingress
tc filter add dev $GTP0 ingress prio 1 flower enc_key_id 1337 \
action mirred egress redirect dev $VF1_PR

By default, a filter for GTP-U will be added. To add a filter for GTP-C,
specify enc_dst_port = 2123, e.g.:

tc filter add dev $GTP0 ingress prio 1 flower enc_key_id 1337 \
enc_dst_port 2123 action mirred egress redirect dev $VF1_PR

Note: outer IPv6 offload is not supported yet.
Note: GTP-U with no payload offload is not supported yet.

ICE COMMS package is required to create a filter as it contains GTP
profiles.

Changes in iproute2 [1] are required to be able to add GTP netdev and use
GTP-specific options (QFI and PDU type).

[1] https://lore.kernel.org/netdev/20220211182902.11542-1-wojciech.drewek@intel.com/T
---
v2: Add more CC
v3: Fix mail thread, sorry for spam
v4: Add GTP echo response in gtp module
v5: Change patch order
v6: Add GTP echo request in gtp module
v7: Fix kernel-docs in ice
v8: Remove handling of GTP Echo Response
v9: Add sending of multicast message on GTP Echo Response, fix GTP-C dummy
    packet selection
v10: Rebase, fixed most 80 char line limits
v11: Rebase, collect Harald's Reviewed-by on patch 3
====================

Signed-off-by: David S. Miller <davem@davemloft.net>
2022-03-12 11:54:29 +00:00
2022-03-11 13:00:17 -08:00
2022-03-08 09:41:18 -08:00
2022-03-03 10:37:23 +00:00
2022-03-11 13:00:17 -08:00
2022-03-06 14:28:31 -08:00

Linux kernel
============

There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.

In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``.  The formatted documentation can also be read online at:

    https://www.kernel.org/doc/html/latest/

There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.

Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.
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