netdev - Re: [RFC PATCH net-next v3 4/4] ice: Add support for PPPoE hardware offload

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Message-ID: <7aa3a974-6575-ade6-b863-feb25736ec0f@linux.intel.com>
Date:   Tue, 5 Jul 2022 11:54:08 +0200
From:   Marcin Szycik <marcin.szycik@...ux.intel.com>
To:     Guillaume Nault <gnault@...hat.com>
Cc:     netdev@...r.kernel.org, anthony.l.nguyen@...el.com,
        davem@...emloft.net, xiyou.wangcong@...il.com,
        jesse.brandeburg@...el.com, gustavoars@...nel.org,
        baowen.zheng@...igine.com, boris.sukholitko@...adcom.com,
        edumazet@...gle.com, kuba@...nel.org, jhs@...atatu.com,
        jiri@...nulli.us, kurt@...utronix.de, pablo@...filter.org,
        pabeni@...hat.com, paulb@...dia.com, simon.horman@...igine.com,
        komachi.yoshiki@...il.com, zhangkaiheb@....com,
        intel-wired-lan@...ts.osuosl.org,
        michal.swiatkowski@...ux.intel.com, wojciech.drewek@...el.com,
        alexandr.lobakin@...el.com, mostrows@...thlink.net,
        paulus@...ba.org
Subject: Re: [RFC PATCH net-next v3 4/4] ice: Add support for PPPoE hardware
 offload



On 01-Jul-22 18:12, Marcin Szycik wrote:
> 
> 
> On 01-Jul-22 01:12, Guillaume Nault wrote:
>> On Wed, Jun 29, 2022 at 04:38:59PM +0200, Marcin Szycik wrote:
>>> Add support for creating PPPoE filters in switchdev mode. Add support
>>> for parsing PPPoE and PPP-specific tc options: pppoe_sid and ppp_proto.
>>>
>>> Example filter:
>>> tc filter add dev $PF1 ingress protocol ppp_ses prio 1 flower pppoe_sid \
>>>     1234 ppp_proto ip 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 as it contains PPPoE
>>> profiles. Added a warning message when loaded DDP package does not contain
>>> required profiles.
>>>
>>> Note: currently matching on vlan + PPPoE fields is not supported. Patch [0]
>>> will add this feature.
>>>
>>> [0] https://patchwork.ozlabs.org/project/intel-wired-lan/patch/20220420210048.5809-1-martyna.szapar-mudlaw@intel.com
>>
>> Out of curiosity, can ice direct PPPoE Session packets to different
>> queues with RSS (based on the session ID)?
> 
> Hardware should support it, but I'm not sure if it's possible with the current driver and how to configure it. I'll try to find out.

>From what I understand, currently it's not possible to configure RSS for PPPoE session id, because ethtool does not support PPPoE.