netdev - Re: SRIOV switchdev mode BoF minutes

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Message-ID: <20180416123936.GH33938@C02RW35GFVH8.dhcp.broadcom.net>
Date:   Mon, 16 Apr 2018 08:39:36 -0400
From:   Andy Gospodarek <andrew.gospodarek@...adcom.com>
To:     Or Gerlitz <gerlitz.or@...il.com>
Cc:     "Samudrala, Sridhar" <sridhar.samudrala@...el.com>,
        David Miller <davem@...emloft.net>,
        Anjali Singhai Jain <anjali.singhai@...el.com>,
        Michael Chan <michael.chan@...adcom.com>,
        Simon Horman <simon.horman@...ronome.com>,
        Jakub Kicinski <jakub.kicinski@...ronome.com>,
        John Fastabend <john.fastabend@...il.com>,
        Saeed Mahameed <saeedm@...lanox.com>,
        Jiri Pirko <jiri@...lanox.com>,
        Rony Efraim <ronye@...lanox.com>,
        Linux Netdev List <netdev@...r.kernel.org>
Subject: Re: SRIOV switchdev mode BoF minutes

On Sun, Apr 15, 2018 at 09:01:16AM +0300, Or Gerlitz wrote:
> On Sat, Apr 14, 2018 at 2:03 AM, Samudrala, Sridhar
> <sridhar.samudrala@...el.com> wrote:
> 
> > I meant between PFs on 2 compute nodes.
> 
> If the PF serves as uplink rep, it functions as  a switch port -- applications
> don't run on switch ports. One way to get apps to run on the host in switchdev
> mode is probe one of the VFs there.
> 
> 
> [...]
> 
> > By smartnic env, i guess you are referring to OVS control plane also running
> > on the NIC.
> 
> correct
> 

Not just OvS, but other applications running on the SmartNIC could use tc for
programming hardware can benefit from a design like this.

> > I will look forward to your patches.
> 
> FWIW, note that my patches don't bring any newz for you.. I am aligning
> mlx5 with what was agreed on netdev, e.g nfp does it (uplink rep and
> such) already.

Probably not major news from us either since this was discussed at the last
NetConf, but we are planning to have this option for SmartNICs or PCI-multihost
NICs, too.