netdev - Re: [RFC PATCH net-next 0/5] ice: L2TPv3 offload support

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Date:   Fri, 26 Aug 2022 16:34:34 +0200
From:   Jiri Pirko <jiri@...nulli.us>
To:     "Drewek, Wojciech" <wojciech.drewek@...el.com>
Cc:     "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "Lobakin, Alexandr" <alexandr.lobakin@...el.com>,
        "Brandeburg, Jesse" <jesse.brandeburg@...el.com>,
        "Nguyen, Anthony L" <anthony.l.nguyen@...el.com>,
        "davem@...emloft.net" <davem@...emloft.net>,
        "edumazet@...gle.com" <edumazet@...gle.com>,
        "kuba@...nel.org" <kuba@...nel.org>,
        "pabeni@...hat.com" <pabeni@...hat.com>,
        "jhs@...atatu.com" <jhs@...atatu.com>,
        "xiyou.wangcong@...il.com" <xiyou.wangcong@...il.com>,
        "marcin.szycik@...ux.intel.com" <marcin.szycik@...ux.intel.com>,
        "michal.swiatkowski@...ux.intel.com" 
        <michal.swiatkowski@...ux.intel.com>,
        "kurt@...utronix.de" <kurt@...utronix.de>,
        "boris.sukholitko@...adcom.com" <boris.sukholitko@...adcom.com>,
        "vladbu@...dia.com" <vladbu@...dia.com>,
        "komachi.yoshiki@...il.com" <komachi.yoshiki@...il.com>,
        "paulb@...dia.com" <paulb@...dia.com>,
        "baowen.zheng@...igine.com" <baowen.zheng@...igine.com>,
        "louis.peens@...igine.com" <louis.peens@...igine.com>,
        "simon.horman@...igine.com" <simon.horman@...igine.com>,
        "pablo@...filter.org" <pablo@...filter.org>,
        "maksym.glubokiy@...ision.eu" <maksym.glubokiy@...ision.eu>,
        "intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>,
        "jchapman@...alix.com" <jchapman@...alix.com>,
        "gnault@...hat.com" <gnault@...hat.com>
Subject: Re: [RFC PATCH net-next 0/5] ice: L2TPv3 offload support

Fri, Aug 26, 2022 at 01:36:55PM CEST, wojciech.drewek@...el.com wrote:
>
>
>> -----Original Message-----
>> From: Jiri Pirko <jiri@...nulli.us>
>> Sent: piątek, 26 sierpnia 2022 13:16
>> To: Drewek, Wojciech <wojciech.drewek@...el.com>
>> Cc: netdev@...r.kernel.org; Lobakin, Alexandr <alexandr.lobakin@...el.com>; Brandeburg, Jesse <jesse.brandeburg@...el.com>;
>> Nguyen, Anthony L <anthony.l.nguyen@...el.com>; davem@...emloft.net; edumazet@...gle.com; kuba@...nel.org;
>> pabeni@...hat.com; jhs@...atatu.com; xiyou.wangcong@...il.com; marcin.szycik@...ux.intel.com;
>> michal.swiatkowski@...ux.intel.com; kurt@...utronix.de; boris.sukholitko@...adcom.com; vladbu@...dia.com;
>> komachi.yoshiki@...il.com; paulb@...dia.com; baowen.zheng@...igine.com; louis.peens@...igine.com;
>> simon.horman@...igine.com; pablo@...filter.org; maksym.glubokiy@...ision.eu; intel-wired-lan@...ts.osuosl.org;
>> jchapman@...alix.com; gnault@...hat.com
>> Subject: Re: [RFC PATCH net-next 0/5] ice: L2TPv3 offload support
>> 
>> Fri, Aug 26, 2022 at 01:00:54PM CEST, wojciech.drewek@...el.com wrote:
>> >Add support for dissecting L2TPv3 session id in flow dissector. Add support
>> >for this field in tc-flower and support offloading L2TPv3. Finally, add
>> >support for hardware offload of L2TPv3 packets based on session id in
>> >switchdev mode in ice driver.
>> >
>> >Example filter:
>> >  # tc filter add dev $PF1 ingress prio 1 protocol ip \
>> >      flower \
>> >        ip_proto l2tp \
>> >        l2tpv3_sid 1234 \
>> >        skip_sw \
>> >      action mirred egress redirect dev $VF1_PR
>> >
>> >Changes in iproute2 are required to use the new fields.
>> >
>> >ICE COMMS DDP package is required to create a filter in ice.
>> 
>> I don't understand what do you mean by this. Could you please explain
>> what this mysterious "ICE COMMS DDP package" is? Do I understand it
>> correctly that without it, the solution would not work?
>
>Sorry, I'll include more precise description in the next version.
>DDP (Dynamic Device Personalization) is a firmware package that contains definitions
>protocol's headers and packets. It allows you  to add support for the new protocol to the
>NIC card without rebooting.  If the DDP package does not support L2TPv3 then hw offload 
>will not work, however sw offload will still work.

Hmm, so it is some FW part? Why do we care about it here in patchset
description?


>
>More info on DDP:
>https://www.intel.com/content/www/us/en/architecture-and-technology/ethernet/dynamic-device-personalization-brief.html
>
>> 
>> >
>> >Marcin Szycik (1):
>> >  ice: Add L2TPv3 hardware offload support
>> >
>> >Wojciech Drewek (4):
>> >  uapi: move IPPROTO_L2TP to in.h
>> >  flow_dissector: Add L2TPv3 dissectors
>> >  net/sched: flower: Add L2TPv3 filter
>> >  flow_offload: Introduce flow_match_l2tpv3
>> >
>> > .../ethernet/intel/ice/ice_protocol_type.h    |  8 +++
>> > drivers/net/ethernet/intel/ice/ice_switch.c   | 70 ++++++++++++++++++-
>> > drivers/net/ethernet/intel/ice/ice_tc_lib.c   | 27 ++++++-
>> > drivers/net/ethernet/intel/ice/ice_tc_lib.h   |  6 ++
>> > include/net/flow_dissector.h                  |  9 +++
>> > include/net/flow_offload.h                    |  6 ++
>> > include/uapi/linux/in.h                       |  2 +
>> > include/uapi/linux/l2tp.h                     |  2 -
>> > include/uapi/linux/pkt_cls.h                  |  2 +
>> > net/core/flow_dissector.c                     | 28 ++++++++
>> > net/core/flow_offload.c                       |  7 ++
>> > net/sched/cls_flower.c                        | 16 +++++
>> > 12 files changed, 179 insertions(+), 4 deletions(-)
>> >
>> >--
>> >2.31.1
>> >