From mboxrd@z Thu Jan  1 00:00:00 1970
From: Andy Gospodarek <andrew.gospodarek@broadcom.com>
Subject: Re: SRIOV switchdev mode BoF minutes
Date: Tue, 17 Apr 2018 09:30:28 -0400
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Cc: Andy Gospodarek <andrew.gospodarek@broadcom.com>,
        Or Gerlitz <gerlitz.or@gmail.com>,
        David Miller <davem@davemloft.net>,
        Anjali Singhai Jain <anjali.singhai@intel.com>,
        Michael Chan <michael.chan@broadcom.com>,
        Simon Horman <simon.horman@netronome.com>,
        Jakub Kicinski <jakub.kicinski@netronome.com>,
        John Fastabend <john.fastabend@gmail.com>,
        Saeed Mahameed <saeedm@mellanox.com>,
        Jiri Pirko <jiri@mellanox.com>,
        Rony Efraim <ronye@mellanox.com>,
        Linux Netdev List <netdev@vger.kernel.org>
To: "Samudrala, Sridhar" <sridhar.samudrala@intel.com>
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On Mon, Apr 16, 2018 at 07:08:39PM -0700, Samudrala, Sridhar wrote:
> 
> On 4/16/2018 5:39 AM, Andy Gospodarek wrote:
> > 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@intel.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.
> > > 
> > > 
> > > 
> So once a pci device is configured in 'switchdev' mode,  only port representor netdevs are
> seen on the host, no more PF netdev.

That is not the functionality I would propose.  The PF netdev will still be there.

> Are you going to expose another way to change sriov_num_vfs when the device is in
> 'switchdev' mode OR do we need to switch to 'legacy' mode to increase/decrease the number of
> VFs?

Since the PF netdev will not disappear, the standard ways to configure number
of VF, etc is still available.

> Even in switchdev mode, i guess it will be possible for host apps to use the IP configured
> on the uplink rep to talk externally.
> 
> In case of multiple uplinks, are you exposing one uplink-rep netdev per uplink?