linux-kernel - Re: [EXTERNAL] Re: [net-next PATCH v11 00/11] Introduce RVU representors

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Message-ID: <ZtWiWvjlMfROMErH@nanopsycho.orion>
Date: Mon, 2 Sep 2024 13:32:42 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Geethasowjanya Akula <gakula@...vell.com>
Cc: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"kuba@...nel.org" <kuba@...nel.org>,
	"davem@...emloft.net" <davem@...emloft.net>,
	"pabeni@...hat.com" <pabeni@...hat.com>,
	"edumazet@...gle.com" <edumazet@...gle.com>,
	Sunil Kovvuri Goutham <sgoutham@...vell.com>,
	Subbaraya Sundeep Bhatta <sbhatta@...vell.com>,
	Hariprasad Kelam <hkelam@...vell.com>
Subject: Re: [EXTERNAL] Re: [net-next PATCH v11 00/11] Introduce RVU
 representors

Sun, Sep 01, 2024 at 12:01:02PM CEST, gakula@...vell.com wrote:
>
>
>>-----Original Message-----
>>From: Jiri Pirko <jiri@...nulli.us>
>>Sent: Thursday, August 22, 2024 8:12 PM
>>To: Geethasowjanya Akula <gakula@...vell.com>
>>Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.org; kuba@...nel.org;
>>davem@...emloft.net; pabeni@...hat.com; edumazet@...gle.com; Sunil
>>Kovvuri Goutham <sgoutham@...vell.com>; Subbaraya Sundeep Bhatta
>><sbhatta@...vell.com>; Hariprasad Kelam <hkelam@...vell.com>
>>Subject: [EXTERNAL] Re: [net-next PATCH v11 00/11] Introduce RVU
>>representors
>>
>>Thu, Aug 22, 2024 at 03:20:20PM CEST, gakula@...vell.com wrote:
>>>This series adds representor support for each rvu devices.
>>>When switchdev mode is enabled, representor netdev is registered for
>>>each rvu device. In implementation of representor model, one NIX HW LF
>>>with multiple SQ and RQ is reserved, where each RQ and SQ of the LF are
>>>mapped to a representor. A loopback channel is reserved to support
>>>packet path between representors and VFs.
>>>CN10K silicon supports 2 types of MACs, RPM and SDP. This patch set
>>>adds representor support for both RPM and SDP MAC interfaces.
>>>
>>>- Patch 1: Refactors and exports the shared service functions.
>>>- Patch 2: Implements basic representor driver.
>>>- Patch 3: Add devlink support to create representor netdevs that
>>>  can be used to manage VFs.
>>>- Patch 4: Implements basec netdev_ndo_ops.
>>>- Patch 5: Installs tcam rules to route packets between representor and
>>>	   VFs.
>>>- Patch 6: Enables fetching VF stats via representor interface
>>>- Patch 7: Adds support to sync link state between representors and VFs .
>>>- Patch 8: Enables configuring VF MTU via representor netdevs.
>>>- Patch 9: Add representors for sdp MAC.
>>>- Patch 10: Add devlink port support.
>>
>>What is the fastpath? Where do you offload any configuration that actually
>>ensures VF<->physical_port and VF<->VF traffic? There should be some
>>bridge/tc/route offload.
>Packet between  VFs and VF -> physical ports are done based on tcam rules installed by  TC only.

Where is the code implementing that?


>>
>>Or, what I fear, do you use some implicit mac-based steering? If yes, you
>No, we don’t do any mac based traffic steerring.
>
>>should not. In switchdev mode, if user does not configure representors to
>>forward packets, there is no packet forwarding.
>
>