net/mlx5e: Use generic API to build MPLS label

	return 0;

}

static inline __be32 mpls_label_id_field(__be32 label, u8 tos, u8 ttl)

{

	u32 res;

	/* mpls label is 32 bits long and construction as follows:

	 * 20 bits label

	 * 3 bits tos

	 * 1 bit bottom of stack. Since we support only one label, this bit is

	 *       always set.

	 * 8 bits TTL

	 */

	res = be32_to_cpu(label) << 12 | 1 << 8 | (tos & 7) <<  9 | ttl;

	return cpu_to_be32(res);

}

static int generate_ip_tun_hdr(char buf[],

			       __u8 *ip_proto,

			       struct mlx5e_encap_entry *r)

{

	const struct ip_tunnel_key *tun_key = &r->tun_info->key;

	__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);

	struct udphdr *udp = (struct udphdr *)(buf);

	struct mpls_shim_hdr *mpls;

	u32 tun_id;

	tun_id = be32_to_cpu(tunnel_id_to_key32(tun_key->tun_id));

	mpls = (struct mpls_shim_hdr *)(udp + 1);

	*ip_proto = IPPROTO_UDP;

	udp->dest = tun_key->tp_dst;

	mpls->label_stack_entry = mpls_label_id_field(tun_id, tun_key->tos, tun_key->ttl);

	*mpls = mpls_entry_encode(tun_id, tun_key->ttl, tun_key->tos, true);

	return 0;

}