linux-kernel - RE: [EXTERNAL] Re: [net-next PATCH v2 7/9] octeontx2-pf: Add support to sync link state between representor and VFs

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Date: Tue, 23 Apr 2024 16:09:02 +0000
From: Geethasowjanya Akula <gakula@...vell.com>
To: Jiri Pirko <jiri@...nulli.us>
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 v2 7/9] octeontx2-pf: Add support
 to sync link state between representor and VFs



> -----Original Message-----
> From: Jiri Pirko <jiri@...nulli.us>
> Sent: Tuesday, April 23, 2024 6:37 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 v2 7/9] octeontx2-pf: Add support to
> sync link state between representor and VFs
> 
> Prioritize security for external emails: Confirm sender and content safety
> before clicking links or opening attachments
> 
> ----------------------------------------------------------------------
> Mon, Apr 22, 2024 at 11:53:59AM CEST, gakula@...vell.com wrote:
> >Implements mbox function to sync the link state between VFs and its
> >representors. Same mbox is use to notify other updates like mtu etc.
> >
> >This patch enables
> >- Reflecting the link state of representor based on the VF state and
> >link state of VF based on representor.
> 
> Could you please elaborate a bit more how exactly this behaves? Examples
> would help.
> 
We patch implement the below requirement mentioned the representors documentation.
Eg: ip link set r0p1 up/down  will disable carrier on/off of the corresponding representee(eth0) interface.


"
The representee's link state is controlled through the representor. Setting the representor administratively UP or DOWN should cause carrier ON or OFF at the representee.
"

> 
> >- On VF interface up/down a notification is sent via mbox to
> >representor
> >  to update the link state.
> >- On representor interafce up/down will cause the link state update of VF.
> >