// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
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/* Copyright (c) 2018 Mellanox Technologies. */
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#include <net/vxlan.h>
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#include "lib/vxlan.h"
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#include "en/tc_tun.h"
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static bool mlx5e_tc_tun_can_offload_vxlan(struct mlx5e_priv *priv)
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{
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return !!MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap);
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}
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static int mlx5e_tc_tun_calc_hlen_vxlan(struct mlx5e_encap_entry *e)
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{
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return VXLAN_HLEN;
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}
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static int mlx5e_tc_tun_check_udp_dport_vxlan(struct mlx5e_priv *priv,
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struct flow_cls_offload *f)
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{
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struct flow_rule *rule = flow_cls_offload_flow_rule(f);
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struct netlink_ext_ack *extack = f->common.extack;
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struct flow_match_ports enc_ports;
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if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS))
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return -EOPNOTSUPP;
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flow_rule_match_enc_ports(rule, &enc_ports);
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/* check the UDP destination port validity */
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if (!mlx5_vxlan_lookup_port(priv->mdev->vxlan,
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be16_to_cpu(enc_ports.key->dst))) {
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NL_SET_ERR_MSG_MOD(extack,
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"Matched UDP dst port is not registered as a VXLAN port");
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netdev_warn(priv->netdev,
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"UDP port %d is not registered as a VXLAN port\n",
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be16_to_cpu(enc_ports.key->dst));
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return -EOPNOTSUPP;
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}
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return 0;
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}
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static int mlx5e_tc_tun_parse_udp_ports_vxlan(struct mlx5e_priv *priv,
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struct mlx5_flow_spec *spec,
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struct flow_cls_offload *f,
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void *headers_c,
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void *headers_v)
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{
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int err = 0;
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err = mlx5e_tc_tun_parse_udp_ports(priv, spec, f, headers_c, headers_v);
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if (err)
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return err;
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return mlx5e_tc_tun_check_udp_dport_vxlan(priv, f);
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}
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static int mlx5e_tc_tun_init_encap_attr_vxlan(struct net_device *tunnel_dev,
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struct mlx5e_priv *priv,
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struct mlx5e_encap_entry *e,
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struct netlink_ext_ack *extack)
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{
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int dst_port = be16_to_cpu(e->tun_info->key.tp_dst);
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e->tunnel = &vxlan_tunnel;
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if (!mlx5_vxlan_lookup_port(priv->mdev->vxlan, dst_port)) {
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NL_SET_ERR_MSG_MOD(extack,
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"vxlan udp dport was not registered with the HW");
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netdev_warn(priv->netdev,
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"%d isn't an offloaded vxlan udp dport\n",
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dst_port);
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return -EOPNOTSUPP;
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}
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e->reformat_type = MLX5_REFORMAT_TYPE_L2_TO_VXLAN;
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return 0;
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}
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static int mlx5e_gen_ip_tunnel_header_vxlan(char buf[],
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__u8 *ip_proto,
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struct mlx5e_encap_entry *e)
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{
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const struct ip_tunnel_key *tun_key = &e->tun_info->key;
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__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
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struct udphdr *udp = (struct udphdr *)(buf);
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struct vxlanhdr *vxh;
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if (tun_key->tun_flags & TUNNEL_VXLAN_OPT)
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return -EOPNOTSUPP;
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vxh = (struct vxlanhdr *)((char *)udp + sizeof(struct udphdr));
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*ip_proto = IPPROTO_UDP;
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udp->dest = tun_key->tp_dst;
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vxh->vx_flags = VXLAN_HF_VNI;
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vxh->vx_vni = vxlan_vni_field(tun_id);
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return 0;
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}
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static int mlx5e_tc_tun_parse_vxlan(struct mlx5e_priv *priv,
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struct mlx5_flow_spec *spec,
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struct flow_cls_offload *f,
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void *headers_c,
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void *headers_v)
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{
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struct flow_rule *rule = flow_cls_offload_flow_rule(f);
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struct netlink_ext_ack *extack = f->common.extack;
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struct flow_match_enc_keyid enc_keyid;
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void *misc_c, *misc_v;
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misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
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misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
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if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID))
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return 0;
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flow_rule_match_enc_keyid(rule, &enc_keyid);
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if (!enc_keyid.mask->keyid)
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return 0;
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/* match on VNI is required */
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if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
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ft_field_support.outer_vxlan_vni)) {
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NL_SET_ERR_MSG_MOD(extack,
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"Matching on VXLAN VNI is not supported");
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netdev_warn(priv->netdev,
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"Matching on VXLAN VNI is not supported\n");
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return -EOPNOTSUPP;
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}
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MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
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be32_to_cpu(enc_keyid.mask->keyid));
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MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
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be32_to_cpu(enc_keyid.key->keyid));
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spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS;
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return 0;
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}
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struct mlx5e_tc_tunnel vxlan_tunnel = {
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.tunnel_type = MLX5E_TC_TUNNEL_TYPE_VXLAN,
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.match_level = MLX5_MATCH_L4,
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.can_offload = mlx5e_tc_tun_can_offload_vxlan,
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.calc_hlen = mlx5e_tc_tun_calc_hlen_vxlan,
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.init_encap_attr = mlx5e_tc_tun_init_encap_attr_vxlan,
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.generate_ip_tun_hdr = mlx5e_gen_ip_tunnel_header_vxlan,
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.parse_udp_ports = mlx5e_tc_tun_parse_udp_ports_vxlan,
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.parse_tunnel = mlx5e_tc_tun_parse_vxlan,
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};
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