netdev - [PATCH net-next 1/7] ice: Accept LAG netdevs in bridge offloads

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Message-Id: <20230801173112.3625977-2-anthony.l.nguyen@intel.com>
Date: Tue,  1 Aug 2023 10:31:06 -0700
From: Tony Nguyen <anthony.l.nguyen@...el.com>
To: davem@...emloft.net,
	kuba@...nel.org,
	pabeni@...hat.com,
	edumazet@...gle.com,
	netdev@...r.kernel.org
Cc: Wojciech Drewek <wojciech.drewek@...el.com>,
	anthony.l.nguyen@...el.com,
	Jedrzej Jagielski <jedrzej.jagielski@...el.com>,
	Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Subject: [PATCH net-next 1/7] ice: Accept LAG netdevs in bridge offloads

From: Wojciech Drewek <wojciech.drewek@...el.com>

Allow LAG interfaces to be used in bridge offload using
netif_is_lag_master. In this case, search for ice netdev in
the list of LAG's lower devices.

Reviewed-by: Jedrzej Jagielski <jedrzej.jagielski@...el.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@...el.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@...el.com>
---
 .../net/ethernet/intel/ice/ice_eswitch_br.c   | 47 +++++++++++++++++--
 1 file changed, 42 insertions(+), 5 deletions(-)

diff --git a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
index cc7357ed6e5f..67bfd1f61cdd 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
@@ -20,8 +20,23 @@ static const struct rhashtable_params ice_fdb_ht_params = {
 
 static bool ice_eswitch_br_is_dev_valid(const struct net_device *dev)
 {
-	/* Accept only PF netdev and PRs */
-	return ice_is_port_repr_netdev(dev) || netif_is_ice(dev);
+	/* Accept only PF netdev, PRs and LAG */
+	return ice_is_port_repr_netdev(dev) || netif_is_ice(dev) ||
+		netif_is_lag_master(dev);
+}
+
+static struct net_device *
+ice_eswitch_br_get_uplink_from_lag(struct net_device *lag_dev)
+{
+	struct net_device *lower;
+	struct list_head *iter;
+
+	netdev_for_each_lower_dev(lag_dev, lower, iter) {
+		if (netif_is_ice(lower))
+			return lower;
+	}
+
+	return NULL;
 }
 
 static struct ice_esw_br_port *
@@ -31,8 +46,19 @@ ice_eswitch_br_netdev_to_port(struct net_device *dev)
 		struct ice_repr *repr = ice_netdev_to_repr(dev);
 
 		return repr->br_port;
-	} else if (netif_is_ice(dev)) {
-		struct ice_pf *pf = ice_netdev_to_pf(dev);
+	} else if (netif_is_ice(dev) || netif_is_lag_master(dev)) {
+		struct net_device *ice_dev;
+		struct ice_pf *pf;
+
+		if (netif_is_lag_master(dev))
+			ice_dev = ice_eswitch_br_get_uplink_from_lag(dev);
+		else
+			ice_dev = dev;
+
+		if (!ice_dev)
+			return NULL;
+
+		pf = ice_netdev_to_pf(ice_dev);
 
 		return pf->br_port;
 	}
@@ -1085,7 +1111,18 @@ ice_eswitch_br_port_link(struct ice_esw_br_offloads *br_offloads,
 		err = ice_eswitch_br_vf_repr_port_init(bridge, repr);
 		trace_ice_eswitch_br_port_link(repr->br_port);
 	} else {
-		struct ice_pf *pf = ice_netdev_to_pf(dev);
+		struct net_device *ice_dev;
+		struct ice_pf *pf;
+
+		if (netif_is_lag_master(dev))
+			ice_dev = ice_eswitch_br_get_uplink_from_lag(dev);
+		else
+			ice_dev = dev;
+
+		if (!ice_dev)
+			return 0;
+
+		pf = ice_netdev_to_pf(ice_dev);
 
 		err = ice_eswitch_br_uplink_port_init(bridge, pf);
 		trace_ice_eswitch_br_port_link(pf->br_port);
-- 
2.38.1