netdev - Re: [iwl-next v3 4/4] ice: update representor when VSI is ready

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Date: Fri, 21 Jun 2024 06:32:10 +0200
From: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
To: Simon Horman <horms@...nel.org>
Cc: intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
	jacob.e.keller@...el.com, michal.kubiak@...el.com,
	maciej.fijalkowski@...el.com, sridhar.samudrala@...el.com,
	przemyslaw.kitszel@...el.com, wojciech.drewek@...el.com,
	pio.raczynski@...il.com, jiri@...dia.com,
	mateusz.polchlopek@...el.com, shayd@...dia.com, kuba@...nel.org
Subject: Re: [iwl-next v3 4/4] ice: update representor when VSI is ready

On Fri, Jun 14, 2024 at 01:47:16PM +0100, Simon Horman wrote:
> On Mon, Jun 10, 2024 at 09:44:34AM +0200, Michal Swiatkowski wrote:
> > In case of reset of VF VSI can be reallocated. To handle this case it
> > should be properly updated.
> > 
> > Reload representor as vsi->vsi_num can be different than the one stored
> > when representor was created.
> > 
> > Instead of only changing antispoof do whole VSI configuration for
> > eswitch.
> > 
> > Signed-off-by: Michal Swiatkowski <michal.swiatkowski@...ux.intel.com>
> 
> Thanks Michal,
> 
> My comment below notwithstanding, this looks good to me.
> 
> Reviewed-by: Simon Horman <horms@...nel.org>
> 
> > ---
> >  drivers/net/ethernet/intel/ice/ice_eswitch.c | 21 +++++++++++++-------
> >  drivers/net/ethernet/intel/ice/ice_eswitch.h |  4 ++--
> >  drivers/net/ethernet/intel/ice/ice_vf_lib.c  |  2 +-
> >  3 files changed, 17 insertions(+), 10 deletions(-)
> > 
> > diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch.c b/drivers/net/ethernet/intel/ice/ice_eswitch.c
> > index 3f73f46111fc..4f539b1c7781 100644
> > --- a/drivers/net/ethernet/intel/ice/ice_eswitch.c
> > +++ b/drivers/net/ethernet/intel/ice/ice_eswitch.c
> > @@ -178,16 +178,16 @@ void ice_eswitch_decfg_vsi(struct ice_vsi *vsi, const u8 *mac)
> >   * @repr_id: representor ID
> >   * @vsi: VSI for which port representor is configured
> >   */
> > -void ice_eswitch_update_repr(unsigned long repr_id, struct ice_vsi *vsi)
> > +void ice_eswitch_update_repr(unsigned long *repr_id, struct ice_vsi *vsi)
> >  {
> >  	struct ice_pf *pf = vsi->back;
> >  	struct ice_repr *repr;
> > -	int ret;
> > +	int err;
> >  
> >  	if (!ice_is_switchdev_running(pf))
> >  		return;
> >  
> > -	repr = xa_load(&pf->eswitch.reprs, repr_id);
> > +	repr = xa_load(&pf->eswitch.reprs, *repr_id);
> >  	if (!repr)
> >  		return;
> >  
> > @@ -197,12 +197,19 @@ void ice_eswitch_update_repr(unsigned long repr_id, struct ice_vsi *vsi)
> >  	if (repr->br_port)
> >  		repr->br_port->vsi = vsi;
> >  
> > -	ret = ice_vsi_update_security(vsi, ice_vsi_ctx_clear_antispoof);
> > -	if (ret) {
> > -		ice_fltr_add_mac_and_broadcast(vsi, repr->parent_mac,
> > -					       ICE_FWD_TO_VSI);
> > +	err = ice_eswitch_cfg_vsi(vsi, repr->parent_mac);
> > +	if (err)
> >  		dev_err(ice_pf_to_dev(pf), "Failed to update VSI of port representor %d",
> >  			repr->id);
> > +
> > +	/* The VSI number is different, reload the PR with new id */
> > +	if (repr->id != vsi->vsi_num) {
> > +		xa_erase(&pf->eswitch.reprs, repr->id);
> > +		repr->id = vsi->vsi_num;
> > +		if (xa_insert(&pf->eswitch.reprs, repr->id, repr, GFP_KERNEL))
> > +			dev_err(ice_pf_to_dev(pf), "Failed to reload port representor %d",
> > +				repr->id);
> > +		*repr_id = repr->id;
> >  	}
> >  }
> 
> FWIIW, I think it would be nicer if ice_eswitch_decfg_vsi returned
> the repr_id rather than passing repr_id by reference. This is because,
> in general, I think it's nicer to reduce side-effects of functions.
> 

I wanted to change repr->id and the vf (or sf) repr id in the same
place. But in general I agree with your comment.

Thanks,
Michal

> ...