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