net/mlx5e: Geneve, Add support for encap/decap flows offload

Add HW offloading support for flows with Geneve encap/decap.

Notes about decap flows with Geneve TLV Options:
  - Support offloading of 32-bit options data only
  - At any given time, only one combination of class/type parameters
    can be offloaded, but the same class/type combination can have
    many different flows offloaded with different 32-bit option data
  - Options with value of 0 can't be offloaded
Reviewed-by: Oz Shlomo <ozsh@mellanox.com>
Signed-off-by: Yevgeny Kliteynik <kliteyn@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

drivers/net/ethernet/mellanox/mlx5/core/Makefile

@@ -32,7 +32,8 @@ mlx5_core-$(CONFIG_MLX5_EN_ARFS)     += en_arfs.o
 mlx5_core-$(CONFIG_MLX5_EN_RXNFC)    += en_fs_ethtool.o
 mlx5_core-$(CONFIG_MLX5_CORE_EN_DCB) += en_dcbnl.o en/port_buffer.o
 mlx5_core-$(CONFIG_MLX5_ESWITCH)     += en_rep.o en_tc.o en/tc_tun.o lib/port_tun.o lag_mp.o \
-					lib/geneve.o en/tc_tun_vxlan.o en/tc_tun_gre.o
+					lib/geneve.o en/tc_tun_vxlan.o en/tc_tun_gre.o \
+					en/tc_tun_geneve.o
 
 #
 # Core extra

drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.c

@@ -3,12 +3,15 @@
 
 #include <net/vxlan.h>
 #include <net/gre.h>
+#include <net/geneve.h>
 #include "en/tc_tun.h"
 
 struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev)
 {
 	if (netif_is_vxlan(tunnel_dev))
 		return &vxlan_tunnel;
+	else if (netif_is_geneve(tunnel_dev))
+		return &geneve_tunnel;
 	else if (netif_is_gretap(tunnel_dev) ||
 		 netif_is_ip6gretap(tunnel_dev))
 		return &gre_tunnel;

drivers/net/ethernet/mellanox/mlx5/core/en/tc_tun.h

@@ -14,6 +14,7 @@
 enum {
 	MLX5E_TC_TUNNEL_TYPE_UNKNOWN,
 	MLX5E_TC_TUNNEL_TYPE_VXLAN,
+	MLX5E_TC_TUNNEL_TYPE_GENEVE,
 	MLX5E_TC_TUNNEL_TYPE_GRETAP,
 };
 
@@ -43,6 +44,7 @@ struct mlx5e_tc_tunnel {
 };
 
 extern struct mlx5e_tc_tunnel vxlan_tunnel;
+extern struct mlx5e_tc_tunnel geneve_tunnel;
 extern struct mlx5e_tc_tunnel gre_tunnel;
 
 struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev);

drivers/net/ethernet/mellanox/mlx5/core/en_tc.c

@@ -53,6 +53,7 @@
 #include "en/port.h"
 #include "en/tc_tun.h"
 #include "lib/devcom.h"
+#include "lib/geneve.h"
 
 struct mlx5_nic_flow_attr {
 	u32 action;
@@ -1063,6 +1064,19 @@ mlx5e_tc_add_fdb_flow(struct mlx5e_priv *priv,
 	return err;
 }
 
+static bool mlx5_flow_has_geneve_opt(struct mlx5e_tc_flow *flow)
+{
+	struct mlx5_flow_spec *spec = &flow->esw_attr->parse_attr->spec;
+	void *headers_v = MLX5_ADDR_OF(fte_match_param,
+				       spec->match_value,
+				       misc_parameters_3);
+	u32 geneve_tlv_opt_0_data = MLX5_GET(fte_match_set_misc3,
+					     headers_v,
+					     geneve_tlv_option_0_data);
+
+	return !!geneve_tlv_opt_0_data;
+}
+
 static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
 				  struct mlx5e_tc_flow *flow)
 {
@@ -1084,6 +1098,9 @@ static void mlx5e_tc_del_fdb_flow(struct mlx5e_priv *priv,
 			mlx5e_tc_unoffload_fdb_rules(esw, flow, attr);
 	}
 
+	if (mlx5_flow_has_geneve_opt(flow))
+		mlx5_geneve_tlv_option_del(priv->mdev->geneve);
+
 	mlx5_eswitch_del_vlan_action(esw, attr);
 
 	for (out_index = 0; out_index < MLX5_MAX_FLOW_FWD_VPORTS; out_index++)
@@ -1494,7 +1511,8 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
 	      BIT(FLOW_DISSECTOR_KEY_ENC_CONTROL) |
 	      BIT(FLOW_DISSECTOR_KEY_TCP) |
 	      BIT(FLOW_DISSECTOR_KEY_IP)  |
-	      BIT(FLOW_DISSECTOR_KEY_ENC_IP))) {
+	      BIT(FLOW_DISSECTOR_KEY_ENC_IP) |
+	      BIT(FLOW_DISSECTOR_KEY_ENC_OPTS))) {
 		NL_SET_ERR_MSG_MOD(extack, "Unsupported key");
 		netdev_warn(priv->netdev, "Unsupported key used: 0x%x\n",
 			    dissector->used_keys);
@@ -1504,7 +1522,8 @@ static int __parse_cls_flower(struct mlx5e_priv *priv,
 	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS) ||
 	    flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV6_ADDRS) ||
 	    flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_KEYID) ||
-	    flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS)) {
+	    flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_PORTS) ||
+	    flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_OPTS)) {
 		if (parse_tunnel_attr(priv, spec, f, filter_dev, tunnel_match_level))
 			return -EOPNOTSUPP;