nfp: flower: allow tunnels to output to internal port

The neighbour table in the FW only accepts next hop entries if the egress
port is an nfp repr. Modify this to allow the next hop to be an internal
port. This means that if a packet is to egress to that port, it will
recirculate back into the system with the internal port becoming its
ingress port.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/flower/tunnel_conf.c

@@ -270,9 +270,10 @@ nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
 		    struct flowi4 *flow, struct neighbour *neigh, gfp_t flag)
 {
 	struct nfp_tun_neigh payload;
+	u32 port_id;
 
-	/* Only offload representor IPv4s for now. */
-	if (!nfp_netdev_is_nfp_repr(netdev))
+	port_id = nfp_flower_get_port_id_from_netdev(app, netdev);
+	if (!port_id)
 		return;
 
 	memset(&payload, 0, sizeof(struct nfp_tun_neigh));
@@ -290,7 +291,7 @@ nfp_tun_write_neigh(struct net_device *netdev, struct nfp_app *app,
 	payload.src_ipv4 = flow->saddr;
 	ether_addr_copy(payload.src_addr, netdev->dev_addr);
 	neigh_ha_snapshot(payload.dst_addr, neigh, netdev);
-	payload.port_id = cpu_to_be32(nfp_repr_get_port_id(netdev));
+	payload.port_id = cpu_to_be32(port_id);
 	/* Add destination of new route to NFP cache. */
 	nfp_tun_add_route_to_cache(app, payload.dst_ipv4);