netdev - RE: [EXTERNAL] Re: [net-next PATCH v7 00/10] Introduce RVU representors

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Message-ID: 
 <CH0PR18MB433908D7965F931EB7D37570CDDD2@CH0PR18MB4339.namprd18.prod.outlook.com>
Date: Wed, 3 Jul 2024 09:10:22 +0000
From: Geethasowjanya Akula <gakula@...vell.com>
To: Jakub Kicinski <kuba@...nel.org>
CC: "netdev@...r.kernel.org" <netdev@...r.kernel.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.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 v7 00/10] Introduce RVU
 representors



>-----Original Message-----
>From: Jakub Kicinski <kuba@...nel.org>
>Sent: Tuesday, July 2, 2024 8:42 AM
>To: Geethasowjanya Akula <gakula@...vell.com>
>Cc: netdev@...r.kernel.org; linux-kernel@...r.kernel.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 v7 00/10] Introduce RVU
>representors
>
>On Fri, 28 Jun 2024 19:05:07 +0530 Geetha sowjanya 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.
>>
>> Command to create VF representor
>> #devlink dev eswitch set pci/0002:1c:00.0 mode switchdev VF
>> representors are created for each VF when switch mode is set switchdev
>> on representor PCI device # devlink dev eswitch set pci/0002:1c:00.0
>> mode switchdev # ip link show
>> 25: r0p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>mode DEFAULT group default qlen 1000
>>     link/ether 32:0f:0f:f0:60:f1 brd ff:ff:ff:ff:ff:ff
>> 26: r1p1: <BROADCAST,MULTICAST> mtu 1500 qdisc noop state DOWN
>mode DEFAULT group default qlen 1000
>>     link/ether 3e:5d:9a:4d:e7:7b brd ff:ff:ff:ff:ff:ff
>>
>> #devlink dev
>> pci/0002:01:00.0
>> pci/0002:02:00.0
>> pci/0002:03:00.0
>> pci/0002:04:00.0
>> pci/0002:05:00.0
>> pci/0002:06:00.0
>> pci/0002:07:00.0
>>
>> ~# devlink port
>> pci/0002:1c:00.0/0: type eth netdev r0p1v0 flavour pcipf controller 0
>> pfnum 1 vfnum 0 external false splittable false
>> pci/0002:1c:00.0/1: type eth netdev r1p1v1 flavour pcivf controller 0
>> pfnum 1 vfnum 1 external false splittable false
>> pci/0002:1c:00.0/2: type eth netdev r2p1v2 flavour pcivf controller 0
>> pfnum 1 vfnum 2 external false splittable false
>> pci/0002:1c:00.0/3: type eth netdev r3p1v3 flavour pcivf controller 0
>> pfnum 1 vfnum 3 external false splittable false
>
>Please document the state before and after switching modes, and record this
>information in
>Documentation/networking/device_drivers/ethernet/marvell/octeontx2.rst
Ok. Will next version with documentation.
>
>In the commands above you seem to operate on a pci/0002:1c:00.0 devlink
>instance, and yet devlink dev does not list it. You have 2 netdevs,
>8 devlinks, 4 ports, and no PF instance. It does not add up..
The log was large. When I cut short actual device was missing. Will provide
complete log in the documentation.