ice: Add VLAN FDB support in switchdev mode

Add support for matching on VLAN tag in bridge offloads.
Currently only trunk mode is supported.

To enable VLAN filtering (existing FDB entries will be deleted):
ip link set $BR type bridge vlan_filtering 1

To add VLANs to bridge in trunk mode:
bridge vlan add dev $PF1 vid 110-111
bridge vlan add dev $VF1_PR vid 110-111
Signed-off-by: Marcin Szycik <marcin.szycik@intel.com>
Signed-off-by: Wojciech Drewek <wojciech.drewek@intel.com>
Tested-by: Sujai Buvaneswaran <sujai.buvaneswaran@intel.com>
Signed-off-by: Tony Nguyen <anthony.l.nguyen@intel.com>

drivers/net/ethernet/intel/ice/ice_eswitch_br.h

@@ -42,6 +42,11 @@ struct ice_esw_br_port {
 	struct ice_vsi *vsi;
 	enum ice_esw_br_port_type type;
 	u16 vsi_idx;
+	struct xarray vlans;
+};
+
+enum {
+	ICE_ESWITCH_BR_VLAN_FILTERING = BIT(0),
 };
 
 struct ice_esw_br {
@@ -52,12 +57,14 @@ struct ice_esw_br {
 	struct list_head fdb_list;
 
 	int ifindex;
+	u32 flags;
 };
 
 struct ice_esw_br_offloads {
 	struct ice_pf *pf;
 	struct ice_esw_br *bridge;
 	struct notifier_block netdev_nb;
+	struct notifier_block switchdev_blk;
 	struct notifier_block switchdev_nb;
 
 	struct workqueue_struct *wq;
@@ -70,6 +77,11 @@ struct ice_esw_br_fdb_work {
 	unsigned long event;
 };
 
+struct ice_esw_br_vlan {
+	u16 vid;
+	u16 flags;
+};
+
 #define ice_nb_to_br_offloads(nb, nb_name) \
 	container_of(nb, \
 		     struct ice_esw_br_offloads, \
@@ -80,6 +92,15 @@ struct ice_esw_br_fdb_work {
 		     struct ice_esw_br_fdb_work, \
 		     work)
 
+static inline bool ice_eswitch_br_is_vid_valid(u16 vid)
+{
+	/* In trunk VLAN mode, for untagged traffic the bridge sends requests
+	 * to offload VLAN 1 with pvid and untagged flags set. Since these
+	 * flags are not supported, add a MAC filter instead.
+	 */
+	return vid > 1;
+}
+
 void
 ice_eswitch_br_offloads_deinit(struct ice_pf *pf);
 int