linux-kernel - Re: [net-next PATCH v11 03/11] octeontx2-pf: Create representor netdev

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Message-ID: <ZsdJI0nAj5QeVHoM@nanopsycho.orion>
Date: Thu, 22 Aug 2024 16:20:19 +0200
From: Jiri Pirko <jiri@...nulli.us>
To: Geetha sowjanya <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,
	sgoutham@...vell.com, sbhatta@...vell.com, hkelam@...vell.com
Subject: Re: [net-next PATCH v11 03/11] octeontx2-pf: Create representor
 netdev

Thu, Aug 22, 2024 at 03:20:23PM CEST, gakula@...vell.com wrote:
>Adds initial devlink support to set/get the switchdev mode.
>Representor netdevs are created for each rvu devices when
>the switch mode is set to 'switchdev'. These netdevs are
>be used to control and configure VFs.
>
>Signed-off-by: Geetha sowjanya <gakula@...vell.com>
>Reviewed-by: Simon Horman <horms@...nel.org>
>---
> .../ethernet/marvell/octeontx2.rst            |  53 ++++++
> .../marvell/octeontx2/nic/otx2_devlink.c      |  49 ++++++
> .../net/ethernet/marvell/octeontx2/nic/rep.c  | 165 ++++++++++++++++++
> .../net/ethernet/marvell/octeontx2/nic/rep.h  |   3 +
> 4 files changed, 270 insertions(+)
>
>diff --git a/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst b/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst
>index 1e196cb9ce25..1132ae2d007c 100644
>--- a/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst
>+++ b/Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst
>@@ -14,6 +14,7 @@ Contents
> - `Basic packet flow`_
> - `Devlink health reporters`_
> - `Quality of service`_
>+- `RVU representors`_
> 
> Overview
> ========
>@@ -340,3 +341,55 @@ Setup HTB offload
>         # tc class add dev <interface> parent 1: classid 1:2 htb rate 10Gbit prio 2 quantum 188416
> 
>         # tc class add dev <interface> parent 1: classid 1:3 htb rate 10Gbit prio 2 quantum 32768
>+
>+
>+RVU Representors
>+================
>+
>+RVU representor driver adds support for creation of representor devices for
>+RVU PFs' VFs in the system. Representor devices are created when user enables
>+the switchdev mode.
>+Switchdev mode can be enabled either before or after setting up SRIOV numVFs.
>+All representor devices share a single NIXLF but each has a dedicated queue
>+(ie RQ/SQ. RVU PF representor driver registers a separate netdev for each
>+RQ/SQ queue pair.
>+
>+HW doesn't have a in-built switch which can do L2 learning and forward pkts
>+between representee and representor. Hence packet path between representee
>+and it's representor is achieved by setting up appropriate NPC MCAM filters.

Isn't this documentation part talking about bits added in patch
"octeontx2-af: Add packet path between representor and VF"
? If yes, move the docs to that patch. Please make sure you add code
alongside with documentation. Or, alternativelly, just let the
documentation be added by separate and last patch.

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