/* SPDX-License-Identifier: GPL-2.0 OR Linux-OpenIB */
/* Copyright (c) 2018 Mellanox Technologies. */

#ifndef __MLX5_EN_TC_TUNNEL_H__
#define __MLX5_EN_TC_TUNNEL_H__

#include <linux/netdevice.h>
#include <linux/mlx5/fs.h>
#include <net/pkt_cls.h>
#include <linux/netlink.h>
#include "en.h"
#include "en_rep.h"

#ifdef CONFIG_MLX5_ESWITCH

enum {
        MLX5E_TC_TUNNEL_TYPE_UNKNOWN,
        MLX5E_TC_TUNNEL_TYPE_VXLAN,
        MLX5E_TC_TUNNEL_TYPE_GENEVE,
        MLX5E_TC_TUNNEL_TYPE_GRETAP,
        MLX5E_TC_TUNNEL_TYPE_MPLSOUDP,
};

struct mlx5e_encap_key {
        const struct ip_tunnel_key *ip_tun_key;
        struct mlx5e_tc_tunnel     *tc_tunnel;
};

struct mlx5e_tc_tunnel {
        int tunnel_type;
        enum mlx5_flow_match_level match_level;

        bool (*can_offload)(struct mlx5e_priv *priv);
        int (*calc_hlen)(struct mlx5e_encap_entry *e);
        int (*init_encap_attr)(struct net_device *tunnel_dev,
                               struct mlx5e_priv *priv,
                               struct mlx5e_encap_entry *e,
                               struct netlink_ext_ack *extack);
        int (*generate_ip_tun_hdr)(char buf[],
                                   __u8 *ip_proto,
                                   struct mlx5e_encap_entry *e);
        int (*parse_udp_ports)(struct mlx5e_priv *priv,
                               struct mlx5_flow_spec *spec,
                               struct flow_cls_offload *f,
                               void *headers_c,
                               void *headers_v);
        int (*parse_tunnel)(struct mlx5e_priv *priv,
                            struct mlx5_flow_spec *spec,
                            struct flow_cls_offload *f,
                            void *headers_c,
                            void *headers_v);
        bool (*encap_info_equal)(struct mlx5e_encap_key *a,
                                 struct mlx5e_encap_key *b);
        int (*get_remote_ifindex)(struct net_device *mirred_dev);
};

extern struct mlx5e_tc_tunnel vxlan_tunnel;
extern struct mlx5e_tc_tunnel geneve_tunnel;
extern struct mlx5e_tc_tunnel gre_tunnel;
extern struct mlx5e_tc_tunnel mplsoudp_tunnel;

struct mlx5e_tc_tunnel *mlx5e_get_tc_tun(struct net_device *tunnel_dev);

int mlx5e_tc_tun_init_encap_attr(struct net_device *tunnel_dev,
                                 struct mlx5e_priv *priv,
                                 struct mlx5e_encap_entry *e,
                                 struct netlink_ext_ack *extack);

int mlx5e_tc_tun_create_header_ipv4(struct mlx5e_priv *priv,
                                    struct net_device *mirred_dev,
                                    struct mlx5e_encap_entry *e);
int mlx5e_tc_tun_update_header_ipv4(struct mlx5e_priv *priv,
                                    struct net_device *mirred_dev,
                                    struct mlx5e_encap_entry *e);

#if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
int mlx5e_tc_tun_create_header_ipv6(struct mlx5e_priv *priv,
                                    struct net_device *mirred_dev,
                                    struct mlx5e_encap_entry *e);
int mlx5e_tc_tun_update_header_ipv6(struct mlx5e_priv *priv,
                                    struct net_device *mirred_dev,
                                    struct mlx5e_encap_entry *e);
#else
static inline int
mlx5e_tc_tun_create_header_ipv6(struct mlx5e_priv *priv,
                                struct net_device *mirred_dev,
                                struct mlx5e_encap_entry *e)
{ return -EOPNOTSUPP; }
static inline int
mlx5e_tc_tun_update_header_ipv6(struct mlx5e_priv *priv,
                                struct net_device *mirred_dev,
                                struct mlx5e_encap_entry *e)
{ return -EOPNOTSUPP; }
#endif
int mlx5e_tc_tun_route_lookup(struct mlx5e_priv *priv,
                              struct mlx5_flow_spec *spec,
                              struct mlx5_flow_attr *attr,
                              struct net_device *filter_dev);

bool mlx5e_tc_tun_device_to_offload(struct mlx5e_priv *priv,
                                    struct net_device *netdev);

int mlx5e_tc_tun_parse(struct net_device *filter_dev,
                       struct mlx5e_priv *priv,
                       struct mlx5_flow_spec *spec,
                       struct flow_cls_offload *f,
                       u8 *match_level);

int mlx5e_tc_tun_parse_udp_ports(struct mlx5e_priv *priv,
                                 struct mlx5_flow_spec *spec,
                                 struct flow_cls_offload *f,
                                 void *headers_c,
                                 void *headers_v);

bool mlx5e_tc_tun_encap_info_equal_generic(struct mlx5e_encap_key *a,
                                           struct mlx5e_encap_key *b);

bool mlx5e_tc_tun_encap_info_equal_options(struct mlx5e_encap_key *a,
                                           struct mlx5e_encap_key *b,
                                           u32 tun_type);
#endif /* CONFIG_MLX5_ESWITCH */

#endif //__MLX5_EN_TC_TUNNEL_H__