netdev - [PATCH net-next 07/12] ice: Accept LAG netdevs in bridge offloads

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Date:   Mon, 17 Apr 2023 11:34:07 +0200
From:   Wojciech Drewek <wojciech.drewek@...el.com>
To:     intel-wired-lan@...ts.osuosl.org
Cc:     netdev@...r.kernel.org, alexandr.lobakin@...el.com,
        david.m.ertman@...el.com, michal.swiatkowski@...ux.intel.com,
        marcin.szycik@...ux.intel.com, pawel.chmielewski@...el.com,
        sridhar.samudrala@...el.com
Subject: [PATCH net-next 07/12] ice: Accept LAG netdevs in bridge offloads

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.

Signed-off-by: Wojciech Drewek <wojciech.drewek@...el.com>
---
 .../net/ethernet/intel/ice/ice_eswitch_br.c   | 40 ++++++++++++++++---
 1 file changed, 35 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 82b5eb2020cd..49381e4bf62a 100644
--- a/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
+++ b/drivers/net/ethernet/intel/ice/ice_eswitch_br.c
@@ -15,8 +15,21 @@ 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_uplnik_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 *
@@ -26,8 +39,16 @@ 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 = dev;
+		struct ice_pf *pf;
+
+		if (netif_is_lag_master(dev))
+			ice_dev = ice_eswitch_br_get_uplnik_from_lag(dev);
+		if (!ice_dev)
+			return NULL;
+
+		pf = ice_netdev_to_pf(ice_dev);
 
 		return pf->br_port;
 	}
@@ -719,7 +740,16 @@ ice_eswitch_br_port_link(struct ice_esw_br_offloads *br_offloads,
 
 		err = ice_eswitch_br_vf_repr_port_init(bridge, repr);
 	} else {
-		struct ice_pf *pf = ice_netdev_to_pf(dev);
+		struct net_device *ice_dev = dev;
+		struct ice_pf *pf;
+
+		if (netif_is_lag_master(dev))
+			ice_dev = ice_eswitch_br_get_uplnik_from_lag(dev);
+
+		if (!ice_dev)
+			return 0;
+
+		pf = ice_netdev_to_pf(ice_dev);
 
 		err = ice_eswitch_br_uplink_port_init(bridge, pf);
 	}
-- 
2.39.2