netdev - RE: [Intel-wired-lan] [PATCH iwl-next v5 06/12] ice: Implement basic eswitch bridge setup

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Message-ID: <PH0PR11MB5013B59ED3CCEDB492004B15965FA@PH0PR11MB5013.namprd11.prod.outlook.com>
Date: Mon, 19 Jun 2023 09:25:00 +0000
From: "Buvaneswaran, Sujai" <sujai.buvaneswaran@...el.com>
To: "Drewek, Wojciech" <wojciech.drewek@...el.com>,
	"intel-wired-lan@...ts.osuosl.org" <intel-wired-lan@...ts.osuosl.org>
CC: "pmenzel@...gen.mpg.de" <pmenzel@...gen.mpg.de>, "netdev@...r.kernel.org"
	<netdev@...r.kernel.org>, "simon.horman@...igine.com"
	<simon.horman@...igine.com>, "dan.carpenter@...aro.org"
	<dan.carpenter@...aro.org>
Subject: RE: [Intel-wired-lan] [PATCH iwl-next v5 06/12] ice: Implement basic
 eswitch bridge setup

> -----Original Message-----
> From: Intel-wired-lan <intel-wired-lan-bounces@...osl.org> On Behalf Of
> Wojciech Drewek
> Sent: Tuesday, June 13, 2023 3:43 PM
> To: intel-wired-lan@...ts.osuosl.org
> Cc: pmenzel@...gen.mpg.de; netdev@...r.kernel.org;
> simon.horman@...igine.com; dan.carpenter@...aro.org
> Subject: [Intel-wired-lan] [PATCH iwl-next v5 06/12] ice: Implement basic
> eswitch bridge setup
> 
> With this patch, ice driver is able to track if the port representors or uplink
> port were added to the linux bridge in switchdev mode. Listen for
> NETDEV_CHANGEUPPER events in order to detect this. ice_esw_br data
> structure reflects the linux bridge and stores all the ports of the bridge
> (ice_esw_br_port) in xarray, it's created when the first port is added to the
> bridge and freed once the last port is removed. Note that only one bridge is
> supported per eswitch.
> 
> Bridge port (ice_esw_br_port) can be either a VF port representor port or
> uplink port (ice_esw_br_port_type). In both cases bridge port holds a
> reference to the VSI, VF's VSI in case of the PR and uplink VSI in case of the
> uplink. VSI's index is used as an index to the xarray in which ports are stored.
> 
> Add a check which prevents configuring switchdev mode if uplink is already
> added to any bridge. This is needed because we need to listen for
> NETDEV_CHANGEUPPER events to record if the uplink was added to the
> bridge. Netdevice notifier is registered after eswitch mode is changed to
> switchdev.
> 
> Reviewed-by: Simon Horman <simon.horman@...igine.com>
> Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
> ---
> v2: fix structure holes, wrapping improvements
> v4: fix potential Null pointer dereference in
>     ice_eswitch_br_port_unlink
> v5: update ice_esw_br_port::vsi on VF reset
> ---
>  drivers/net/ethernet/intel/ice/Makefile       |   2 +-
>  drivers/net/ethernet/intel/ice/ice.h          |   4 +-
>  drivers/net/ethernet/intel/ice/ice_eswitch.c  |  26 +-
>  .../net/ethernet/intel/ice/ice_eswitch_br.c   | 384 ++++++++++++++++++
>  .../net/ethernet/intel/ice/ice_eswitch_br.h   |  42 ++
>  drivers/net/ethernet/intel/ice/ice_main.c     |   2 +-
>  drivers/net/ethernet/intel/ice/ice_repr.c     |   2 +-
>  drivers/net/ethernet/intel/ice/ice_repr.h     |   3 +-
>  8 files changed, 456 insertions(+), 9 deletions(-)  create mode 100644
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>