diff options
Diffstat (limited to 'drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_mplsoudp.c')
| -rw-r--r-- | drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_mplsoudp.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_mplsoudp.c b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_mplsoudp.c new file mode 100644 index 000000000000..c5b1617d556f --- /dev/null +++ b/drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun_mplsoudp.c @@ -0,0 +1,128 @@ +// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB +/* Copyright (c) 2018 Mellanox Technologies. */ + +#include <net/bareudp.h> +#include <net/mpls.h> +#include "en/tc_tun.h" + +static bool can_offload(struct mlx5e_priv *priv) +{ + return MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, reformat_l3_tunnel_to_l2); +} + +static int calc_hlen(struct mlx5e_encap_entry *e) +{ + return sizeof(struct udphdr) + MPLS_HLEN; +} + +static int init_encap_attr(struct net_device *tunnel_dev, + struct mlx5e_priv *priv, + struct mlx5e_encap_entry *e, + struct netlink_ext_ack *extack) +{ + e->tunnel = &mplsoudp_tunnel; + e->reformat_type = MLX5_REFORMAT_TYPE_L2_TO_L3_TUNNEL; + return 0; +} + +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; + const struct mlx5e_mpls_info *mpls_info = &r->mpls_info; + struct udphdr *udp = (struct udphdr *)(buf); + struct mpls_shim_hdr *mpls; + + mpls = (struct mpls_shim_hdr *)(udp + 1); + *ip_proto = IPPROTO_UDP; + + udp->dest = tun_key->tp_dst; + *mpls = mpls_entry_encode(mpls_info->label, mpls_info->ttl, mpls_info->tc, mpls_info->bos); + + return 0; +} + +static int parse_udp_ports(struct mlx5e_priv *priv, + struct mlx5_flow_spec *spec, + struct flow_cls_offload *f, + void *headers_c, + void *headers_v) +{ + return mlx5e_tc_tun_parse_udp_ports(priv, spec, f, headers_c, headers_v); +} + +static int parse_tunnel(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 flow_match_mpls match; + void *misc2_c; + void *misc2_v; + + if (!MLX5_CAP_ETH(priv->mdev, tunnel_stateless_mpls_over_udp) && + !(MLX5_CAP_GEN(priv->mdev, flex_parser_protocols) & MLX5_FLEX_PROTO_CW_MPLS_UDP)) + return -EOPNOTSUPP; + + if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID)) + return -EOPNOTSUPP; + + if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_MPLS)) + return 0; + + flow_rule_match_mpls(rule, &match); + + /* Only support matching the first LSE */ + if (match.mask->used_lses != 1) + return -EOPNOTSUPP; + + misc2_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, + misc_parameters_2); + misc2_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, + misc_parameters_2); + + MLX5_SET(fte_match_set_misc2, misc2_c, + outer_first_mpls_over_udp.mpls_label, + match.mask->ls[0].mpls_label); + MLX5_SET(fte_match_set_misc2, misc2_v, + outer_first_mpls_over_udp.mpls_label, + match.key->ls[0].mpls_label); + + MLX5_SET(fte_match_set_misc2, misc2_c, + outer_first_mpls_over_udp.mpls_exp, + match.mask->ls[0].mpls_tc); + MLX5_SET(fte_match_set_misc2, misc2_v, + outer_first_mpls_over_udp.mpls_exp, match.key->ls[0].mpls_tc); + + MLX5_SET(fte_match_set_misc2, misc2_c, + outer_first_mpls_over_udp.mpls_s_bos, + match.mask->ls[0].mpls_bos); + MLX5_SET(fte_match_set_misc2, misc2_v, + outer_first_mpls_over_udp.mpls_s_bos, + match.key->ls[0].mpls_bos); + + MLX5_SET(fte_match_set_misc2, misc2_c, + outer_first_mpls_over_udp.mpls_ttl, + match.mask->ls[0].mpls_ttl); + MLX5_SET(fte_match_set_misc2, misc2_v, + outer_first_mpls_over_udp.mpls_ttl, + match.key->ls[0].mpls_ttl); + spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS_2; + + return 0; +} + +struct mlx5e_tc_tunnel mplsoudp_tunnel = { + .tunnel_type = MLX5E_TC_TUNNEL_TYPE_MPLSOUDP, + .match_level = MLX5_MATCH_L4, + .can_offload = can_offload, + .calc_hlen = calc_hlen, + .init_encap_attr = init_encap_attr, + .generate_ip_tun_hdr = generate_ip_tun_hdr, + .parse_udp_ports = parse_udp_ports, + .parse_tunnel = parse_tunnel, + .encap_info_equal = mlx5e_tc_tun_encap_info_equal_generic, +}; |