[PATCH net-next v8 0/7] ice: GTP support in switchdev

[Marcin Szycik <marcin.szycik@linux.intel.com>]

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: Adding more CC
v3: Fixed mail thread, sorry for spam
v4: Added GTP echo response in gtp module
v5: Change patch order
v6: Added GTP echo request in gtp module
v7: Fix kernel-docs in ice
v8: Remove handling of GTP Echo Response

Marcin Szycik (1):
  ice: Support GTP-U and GTP-C offload in switchdev

Michal Swiatkowski (1):
  ice: Fix FV offset searching

Wojciech Drewek (5):
  gtp: Allow to create GTP device without FDs
  gtp: Implement GTP echo response
  gtp: Implement GTP echo request
  net/sched: Allow flower to match on GTP options
  gtp: Add support for checking GTP device type

 drivers/net/ethernet/intel/ice/ice.h          |   1 +
 .../net/ethernet/intel/ice/ice_flex_pipe.c    |  52 +-
 .../net/ethernet/intel/ice/ice_flex_pipe.h    |   2 +-
 .../net/ethernet/intel/ice/ice_flex_type.h    |   6 +-
 .../ethernet/intel/ice/ice_protocol_type.h    |  19 +
 drivers/net/ethernet/intel/ice/ice_switch.c   | 630 ++++++++++++++++--
 drivers/net/ethernet/intel/ice/ice_switch.h   |   9 +
 drivers/net/ethernet/intel/ice/ice_tc_lib.c   | 105 ++-
 drivers/net/ethernet/intel/ice/ice_tc_lib.h   |   3 +
 drivers/net/gtp.c                             | 426 +++++++++++-
 include/net/gtp.h                             |  42 ++
 include/uapi/linux/gtp.h                      |   1 +
 include/uapi/linux/if_link.h                  |   2 +
 include/uapi/linux/if_tunnel.h                |   4 +-
 include/uapi/linux/pkt_cls.h                  |  15 +
 net/sched/cls_flower.c                        | 116 ++++
 16 files changed, 1330 insertions(+), 103 deletions(-)

-- 
2.35.1