--- /dev/null
+// SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB
+/* Copyright (c) 2018 Mellanox Technologies. */
+
+#include <net/geneve.h>
+#include "lib/geneve.h"
+#include "en/tc_tun.h"
+
+#define MLX5E_GENEVE_VER 0
+
+static bool mlx5e_tc_tun_can_offload_geneve(struct mlx5e_priv *priv)
+{
+ return !!(MLX5_CAP_GEN(priv->mdev, flex_parser_protocols) & MLX5_FLEX_PROTO_GENEVE);
+}
+
+static int mlx5e_tc_tun_calc_hlen_geneve(struct mlx5e_encap_entry *e)
+{
+ return sizeof(struct udphdr) +
+ sizeof(struct genevehdr) +
+ e->tun_info->options_len;
+}
+
+static int mlx5e_tc_tun_check_udp_dport_geneve(struct mlx5e_priv *priv,
+ struct tc_cls_flower_offload *f)
+{
+ struct flow_rule *rule = tc_cls_flower_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);
+
+ /* Currently we support only default GENEVE
+ * port, so udp dst port must match.
+ */
+ if (be16_to_cpu(enc_ports.key->dst) != GENEVE_UDP_PORT) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matched UDP dst port is not registered as a GENEVE port");
+ netdev_warn(priv->netdev,
+ "UDP port %d is not registered as a GENEVE port\n",
+ be16_to_cpu(enc_ports.key->dst));
+ return -EOPNOTSUPP;
+ }
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_udp_ports_geneve(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f,
+ void *headers_c,
+ void *headers_v)
+{
+ int err;
+
+ 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_geneve(priv, f);
+}
+
+static int mlx5e_tc_tun_init_encap_attr_geneve(struct net_device *tunnel_dev,
+ struct mlx5e_priv *priv,
+ struct mlx5e_encap_entry *e,
+ struct netlink_ext_ack *extack)
+{
+ e->tunnel = &geneve_tunnel;
+
+ /* Reformat type for GENEVE encap is similar to VXLAN:
+ * in both cases the HW adds in the same place a
+ * defined encapsulation header that the SW provides.
+ */
+ e->reformat_type = MLX5_REFORMAT_TYPE_L2_TO_VXLAN;
+ return 0;
+}
+
+static void mlx5e_tunnel_id_to_vni(__be64 tun_id, __u8 *vni)
+{
+#ifdef __BIG_ENDIAN
+ vni[0] = (__force __u8)(tun_id >> 16);
+ vni[1] = (__force __u8)(tun_id >> 8);
+ vni[2] = (__force __u8)tun_id;
+#else
+ vni[0] = (__force __u8)((__force u64)tun_id >> 40);
+ vni[1] = (__force __u8)((__force u64)tun_id >> 48);
+ vni[2] = (__force __u8)((__force u64)tun_id >> 56);
+#endif
+}
+
+static int mlx5e_gen_ip_tunnel_header_geneve(char buf[],
+ __u8 *ip_proto,
+ struct mlx5e_encap_entry *e)
+{
+ const struct ip_tunnel_info *tun_info = e->tun_info;
+ struct udphdr *udp = (struct udphdr *)(buf);
+ struct genevehdr *geneveh;
+
+ geneveh = (struct genevehdr *)((char *)udp + sizeof(struct udphdr));
+
+ *ip_proto = IPPROTO_UDP;
+
+ udp->dest = tun_info->key.tp_dst;
+
+ memset(geneveh, 0, sizeof(*geneveh));
+ geneveh->ver = MLX5E_GENEVE_VER;
+ geneveh->opt_len = tun_info->options_len / 4;
+ geneveh->oam = !!(tun_info->key.tun_flags & TUNNEL_OAM);
+ geneveh->critical = !!(tun_info->key.tun_flags & TUNNEL_CRIT_OPT);
+ mlx5e_tunnel_id_to_vni(tun_info->key.tun_id, geneveh->vni);
+ geneveh->proto_type = htons(ETH_P_TEB);
+
+ if (tun_info->key.tun_flags & TUNNEL_GENEVE_OPT) {
+ if (!geneveh->opt_len)
+ return -EOPNOTSUPP;
+ ip_tunnel_info_opts_get(geneveh->options, tun_info);
+ }
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_geneve_vni(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f)
+{
+ struct flow_rule *rule = tc_cls_flower_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;
+
+ if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, ft_field_support.outer_geneve_vni)) {
+ NL_SET_ERR_MSG_MOD(extack, "Matching on GENEVE VNI is not supported");
+ netdev_warn(priv->netdev, "Matching on GENEVE VNI is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ MLX5_SET(fte_match_set_misc, misc_c, geneve_vni, be32_to_cpu(enc_keyid.mask->keyid));
+ MLX5_SET(fte_match_set_misc, misc_v, geneve_vni, be32_to_cpu(enc_keyid.key->keyid));
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_geneve_options(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f)
+{
+ u8 max_tlv_option_data_len = MLX5_CAP_GEN(priv->mdev, max_geneve_tlv_option_data_len);
+ u8 max_tlv_options = MLX5_CAP_GEN(priv->mdev, max_geneve_tlv_options);
+ struct flow_rule *rule = tc_cls_flower_offload_flow_rule(f);
+ struct netlink_ext_ack *extack = f->common.extack;
+ void *misc_c, *misc_v, *misc_3_c, *misc_3_v;
+ struct geneve_opt *option_key, *option_mask;
+ __be32 opt_data_key = 0, opt_data_mask = 0;
+ struct flow_match_enc_opts enc_opts;
+ int res = 0;
+
+ 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);
+ misc_3_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters_3);
+ misc_3_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters_3);
+
+ if (!flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS))
+ return 0;
+
+ flow_rule_match_enc_opts(rule, &enc_opts);
+
+ if (memchr_inv(&enc_opts.mask->data, 0, sizeof(enc_opts.mask->data)) &&
+ !MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
+ ft_field_support.geneve_tlv_option_0_data)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options is not supported");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* make sure that we're talking about GENEVE options */
+
+ if (enc_opts.key->dst_opt_type != TUNNEL_GENEVE_OPT) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options: option type is not GENEVE");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options: option type is not GENEVE\n");
+ return -EOPNOTSUPP;
+ }
+
+ if (enc_opts.mask->len &&
+ !MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
+ ft_field_support.outer_geneve_opt_len)) {
+ NL_SET_ERR_MSG_MOD(extack, "Matching on GENEVE options len is not supported");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options len is not supported\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* max_geneve_tlv_option_data_len comes in multiples of 4 bytes, and it
+ * doesn't include the TLV option header. 'geneve_opt_len' is a total
+ * len of all the options, including the headers, also multiples of 4
+ * bytes. Len that comes from the dissector is in bytes.
+ */
+
+ if ((enc_opts.key->len / 4) > ((max_tlv_option_data_len + 1) * max_tlv_options)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options: unsupported options len");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options: unsupported options len (len=%d)\n",
+ enc_opts.key->len);
+ return -EOPNOTSUPP;
+ }
+
+ MLX5_SET(fte_match_set_misc, misc_c, geneve_opt_len, enc_opts.mask->len / 4);
+ MLX5_SET(fte_match_set_misc, misc_v, geneve_opt_len, enc_opts.key->len / 4);
+
+ /* we support matching on one option only, so just get it */
+ option_key = (struct geneve_opt *)&enc_opts.key->data[0];
+ option_mask = (struct geneve_opt *)&enc_opts.mask->data[0];
+
+ if (option_key->length > max_tlv_option_data_len) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options: unsupported option len");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options: unsupported option len (key=%d, mask=%d)\n",
+ option_key->length, option_mask->length);
+ return -EOPNOTSUPP;
+ }
+
+ /* data can't be all 0 - fail to offload such rule */
+ if (!memchr_inv(option_key->opt_data, 0, option_key->length * 4)) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options: can't match on 0 data field");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options: can't match on 0 data field\n");
+ return -EOPNOTSUPP;
+ }
+
+ /* add new GENEVE TLV options object */
+ res = mlx5_geneve_tlv_option_add(priv->mdev->geneve, option_key);
+ if (res) {
+ NL_SET_ERR_MSG_MOD(extack,
+ "Matching on GENEVE options: failed creating TLV opt object");
+ netdev_warn(priv->netdev,
+ "Matching on GENEVE options: failed creating TLV opt object (class:type:len = 0x%x:0x%x:%d)\n",
+ be16_to_cpu(option_key->opt_class),
+ option_key->type, option_key->length);
+ return res;
+ }
+
+ /* In general, after creating the object, need to query it
+ * in order to check which option data to set in misc3.
+ * But we support only geneve_tlv_option_0_data, so no
+ * point querying at this stage.
+ */
+
+ memcpy(&opt_data_key, option_key->opt_data, option_key->length * 4);
+ memcpy(&opt_data_mask, option_mask->opt_data, option_mask->length * 4);
+ MLX5_SET(fte_match_set_misc3, misc_3_v,
+ geneve_tlv_option_0_data, be32_to_cpu(opt_data_key));
+ MLX5_SET(fte_match_set_misc3, misc_3_c,
+ geneve_tlv_option_0_data, be32_to_cpu(opt_data_mask));
+
+ spec->match_criteria_enable |= MLX5_MATCH_MISC_PARAMETERS_3;
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_geneve_params(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f)
+{
+ void *misc_c = MLX5_ADDR_OF(fte_match_param, spec->match_criteria, misc_parameters);
+ void *misc_v = MLX5_ADDR_OF(fte_match_param, spec->match_value, misc_parameters);
+ struct netlink_ext_ack *extack = f->common.extack;
+
+ /* match on OAM - packets with OAM bit on should NOT be offloaded */
+
+ if (!MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev, ft_field_support.outer_geneve_oam)) {
+ NL_SET_ERR_MSG_MOD(extack, "Matching on GENEVE OAM is not supported");
+ netdev_warn(priv->netdev, "Matching on GENEVE OAM is not supported\n");
+ return -EOPNOTSUPP;
+ }
+ MLX5_SET_TO_ONES(fte_match_set_misc, misc_c, geneve_oam);
+ MLX5_SET(fte_match_set_misc, misc_v, geneve_oam, 0);
+
+ /* Match on GENEVE protocol. We support only Transparent Eth Bridge. */
+
+ if (MLX5_CAP_ESW_FLOWTABLE_FDB(priv->mdev,
+ ft_field_support.outer_geneve_protocol_type)) {
+ MLX5_SET_TO_ONES(fte_match_set_misc, misc_c, geneve_protocol_type);
+ MLX5_SET(fte_match_set_misc, misc_v, geneve_protocol_type, ETH_P_TEB);
+ }
+
+ return 0;
+}
+
+static int mlx5e_tc_tun_parse_geneve(struct mlx5e_priv *priv,
+ struct mlx5_flow_spec *spec,
+ struct tc_cls_flower_offload *f,
+ void *headers_c,
+ void *headers_v)
+{
+ int err;
+
+ err = mlx5e_tc_tun_parse_geneve_params(priv, spec, f);
+ if (err)
+ return err;
+
+ err = mlx5e_tc_tun_parse_geneve_vni(priv, spec, f);
+ if (err)
+ return err;
+
+ return mlx5e_tc_tun_parse_geneve_options(priv, spec, f);
+}
+
+struct mlx5e_tc_tunnel geneve_tunnel = {
+ .tunnel_type = MLX5E_TC_TUNNEL_TYPE_GENEVE,
+ .match_level = MLX5_MATCH_L4,
+ .can_offload = mlx5e_tc_tun_can_offload_geneve,
+ .calc_hlen = mlx5e_tc_tun_calc_hlen_geneve,
+ .init_encap_attr = mlx5e_tc_tun_init_encap_attr_geneve,
+ .generate_ip_tun_hdr = mlx5e_gen_ip_tunnel_header_geneve,
+ .parse_udp_ports = mlx5e_tc_tun_parse_udp_ports_geneve,
+ .parse_tunnel = mlx5e_tc_tun_parse_geneve,
+};
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