net/mlx5e: Move TC tunnel offloading code to separate source file

Move tunnel offloading related code to a separate source file for better
code maintainability.

Code refactoring with no functional change.
Signed-off-by: Oz Shlomo <ozsh@mellanox.com>
Reviewed-by: Eli Britstein <elibr@mellanox.com>
Signed-off-by: Saeed Mahameed <saeedm@mellanox.com>

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

@@ -30,7 +30,7 @@ mlx5_core-$(CONFIG_MLX5_CORE_EN) += en_main.o en_common.o en_fs.o en_ethtool.o \
 mlx5_core-$(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-$(CONFIG_MLX5_ESWITCH)     += en_rep.o en_tc.o
+mlx5_core-$(CONFIG_MLX5_ESWITCH)     += en_rep.o en_tc.o en/tc_tun.o
 
 #
 # Core extra

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

+/* 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 int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
+				   struct net_device *mirred_dev,
+				   struct net_device **out_dev,
+				   struct flowi4 *fl4,
+				   struct neighbour **out_n,
+				   u8 *out_ttl)
+{
+	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
+	struct mlx5e_rep_priv *uplink_rpriv;
+	struct rtable *rt;
+	struct neighbour *n = NULL;
+
+#if IS_ENABLED(CONFIG_INET)
+	int ret;
+
+	rt = ip_route_output_key(dev_net(mirred_dev), fl4);
+	ret = PTR_ERR_OR_ZERO(rt);
+	if (ret)
+		return ret;
+#else
+	return -EOPNOTSUPP;
+#endif
+	uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
+	/* if the egress device isn't on the same HW e-switch, we use the uplink */
+	if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
+		*out_dev = uplink_rpriv->netdev;
+	else
+		*out_dev = rt->dst.dev;
+
+	if (!(*out_ttl))
+		*out_ttl = ip4_dst_hoplimit(&rt->dst);
+	n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
+	ip_rt_put(rt);
+	if (!n)
+		return -ENOMEM;
+
+	*out_n = n;
+	return 0;
+}
+
+static const char *mlx5e_netdev_kind(struct net_device *dev)
+{
+	if (dev->rtnl_link_ops)
+		return dev->rtnl_link_ops->kind;
+	else
+		return "";
+}
+
+static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
+				   struct net_device *mirred_dev,
+				   struct net_device **out_dev,
+				   struct flowi6 *fl6,
+				   struct neighbour **out_n,
+				   u8 *out_ttl)
+{
+	struct neighbour *n = NULL;
+	struct dst_entry *dst;
+
+#if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
+	struct mlx5e_rep_priv *uplink_rpriv;
+	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
+	int ret;
+
+	ret = ipv6_stub->ipv6_dst_lookup(dev_net(mirred_dev), NULL, &dst,
+					 fl6);
+	if (ret < 0)
+		return ret;
+
+	if (!(*out_ttl))
+		*out_ttl = ip6_dst_hoplimit(dst);
+
+	uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
+	/* if the egress device isn't on the same HW e-switch, we use the uplink */
+	if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
+		*out_dev = uplink_rpriv->netdev;
+	else
+		*out_dev = dst->dev;
+#else
+	return -EOPNOTSUPP;
+#endif
+
+	n = dst_neigh_lookup(dst, &fl6->daddr);
+	dst_release(dst);
+	if (!n)
+		return -ENOMEM;
+
+	*out_n = n;
+	return 0;
+}
+
+static int mlx5e_gen_vxlan_header(char buf[], struct ip_tunnel_key *tun_key)
+{
+	__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
+	struct udphdr *udp = (struct udphdr *)(buf);
+	struct vxlanhdr *vxh = (struct vxlanhdr *)
+			       ((char *)udp + sizeof(struct udphdr));
+
+	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_gen_ip_tunnel_header(char buf[], __u8 *ip_proto,
+				      struct mlx5e_encap_entry *e)
+{
+	int err = 0;
+	struct ip_tunnel_key *key = &e->tun_info.key;
+
+	if (e->tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
+		*ip_proto = IPPROTO_UDP;
+		err = mlx5e_gen_vxlan_header(buf, key);
+	} else {
+		pr_warn("mlx5: Cannot generate tunnel header for tunnel type (%d)\n"
+			, e->tunnel_type);
+		err = -EOPNOTSUPP;
+	}
+
+	return err;
+}
+
+int mlx5e_tc_tun_create_header_ipv4(struct mlx5e_priv *priv,
+				    struct net_device *mirred_dev,
+				    struct mlx5e_encap_entry *e)
+{
+	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
+	int ipv4_encap_size = ETH_HLEN +
+			      sizeof(struct iphdr) +
+			      e->tunnel_hlen;
+	struct ip_tunnel_key *tun_key = &e->tun_info.key;
+	struct net_device *out_dev;
+	struct neighbour *n = NULL;
+	struct flowi4 fl4 = {};
+	char *encap_header;
+	struct ethhdr *eth;
+	u8 nud_state, ttl;
+	struct iphdr *ip;
+	int err;
+
+	if (max_encap_size < ipv4_encap_size) {
+		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
+			       ipv4_encap_size, max_encap_size);
+		return -EOPNOTSUPP;
+	}
+
+	encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
+	if (!encap_header)
+		return -ENOMEM;
+
+	/* add the IP fields */
+	fl4.flowi4_tos = tun_key->tos;
+	fl4.daddr = tun_key->u.ipv4.dst;
+	fl4.saddr = tun_key->u.ipv4.src;
+	ttl = tun_key->ttl;
+
+	err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
+				      &fl4, &n, &ttl);
+	if (err)
+		goto free_encap;
+
+	/* used by mlx5e_detach_encap to lookup a neigh hash table
+	 * entry in the neigh hash table when a user deletes a rule
+	 */
+	e->m_neigh.dev = n->dev;
+	e->m_neigh.family = n->ops->family;
+	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
+	e->out_dev = out_dev;
+
+	/* It's important to add the neigh to the hash table before checking
+	 * the neigh validity state. So if we'll get a notification, in case the
+	 * neigh changes it's validity state, we would find the relevant neigh
+	 * in the hash.
+	 */
+	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
+	if (err)
+		goto free_encap;
+
+	read_lock_bh(&n->lock);
+	nud_state = n->nud_state;
+	ether_addr_copy(e->h_dest, n->ha);
+	read_unlock_bh(&n->lock);
+
+	/* add ethernet header */
+	eth = (struct ethhdr *)encap_header;
+	ether_addr_copy(eth->h_dest, e->h_dest);
+	ether_addr_copy(eth->h_source, out_dev->dev_addr);
+	eth->h_proto = htons(ETH_P_IP);
+
+	/* add ip header */
+	ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
+	ip->tos = tun_key->tos;
+	ip->version = 0x4;
+	ip->ihl = 0x5;
+	ip->ttl = ttl;
+	ip->daddr = fl4.daddr;
+	ip->saddr = fl4.saddr;
+
+	/* add tunneling protocol header */
+	err = mlx5e_gen_ip_tunnel_header((char *)ip + sizeof(struct iphdr),
+					 &ip->protocol, e);
+	if (err)
+		goto destroy_neigh_entry;
+
+	e->encap_size = ipv4_encap_size;
+	e->encap_header = encap_header;
+
+	if (!(nud_state & NUD_VALID)) {
+		neigh_event_send(n, NULL);
+		err = -EAGAIN;
+		goto out;
+	}
+
+	err = mlx5_packet_reformat_alloc(priv->mdev,
+					 e->reformat_type,
+					 ipv4_encap_size, encap_header,
+					 MLX5_FLOW_NAMESPACE_FDB,
+					 &e->encap_id);
+	if (err)
+		goto destroy_neigh_entry;
+
+	e->flags |= MLX5_ENCAP_ENTRY_VALID;
+	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
+	neigh_release(n);
+	return err;
+
+destroy_neigh_entry:
+	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
+free_encap:
+	kfree(encap_header);
+out:
+	if (n)
+		neigh_release(n);
+	return err;
+}
+
+int mlx5e_tc_tun_create_header_ipv6(struct mlx5e_priv *priv,
+				    struct net_device *mirred_dev,
+				    struct mlx5e_encap_entry *e)
+{
+	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
+	int ipv6_encap_size = ETH_HLEN +
+			      sizeof(struct ipv6hdr) +
+			      e->tunnel_hlen;
+	struct ip_tunnel_key *tun_key = &e->tun_info.key;
+	struct net_device *out_dev;
+	struct neighbour *n = NULL;
+	struct flowi6 fl6 = {};
+	struct ipv6hdr *ip6h;
+	char *encap_header;
+	struct ethhdr *eth;
+	u8 nud_state, ttl;
+	int err;
+
+	if (max_encap_size < ipv6_encap_size) {
+		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
+			       ipv6_encap_size, max_encap_size);
+		return -EOPNOTSUPP;
+	}
+
+	encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
+	if (!encap_header)
+		return -ENOMEM;
+
+	ttl = tun_key->ttl;
+
+	fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
+	fl6.daddr = tun_key->u.ipv6.dst;
+	fl6.saddr = tun_key->u.ipv6.src;
+
+	err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
+				      &fl6, &n, &ttl);
+	if (err)
+		goto free_encap;
+
+	/* used by mlx5e_detach_encap to lookup a neigh hash table
+	 * entry in the neigh hash table when a user deletes a rule
+	 */
+	e->m_neigh.dev = n->dev;
+	e->m_neigh.family = n->ops->family;
+	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
+	e->out_dev = out_dev;
+
+	/* It's importent to add the neigh to the hash table before checking
+	 * the neigh validity state. So if we'll get a notification, in case the
+	 * neigh changes it's validity state, we would find the relevant neigh
+	 * in the hash.
+	 */
+	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
+	if (err)
+		goto free_encap;
+
+	read_lock_bh(&n->lock);
+	nud_state = n->nud_state;
+	ether_addr_copy(e->h_dest, n->ha);
+	read_unlock_bh(&n->lock);
+
+	/* add ethernet header */
+	eth = (struct ethhdr *)encap_header;
+	ether_addr_copy(eth->h_dest, e->h_dest);
+	ether_addr_copy(eth->h_source, out_dev->dev_addr);
+	eth->h_proto = htons(ETH_P_IPV6);
+
+	/* add ip header */
+	ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
+	ip6_flow_hdr(ip6h, tun_key->tos, 0);
+	/* the HW fills up ipv6 payload len */
+	ip6h->hop_limit   = ttl;
+	ip6h->daddr	  = fl6.daddr;
+	ip6h->saddr	  = fl6.saddr;
+
+	/* add tunneling protocol header */
+	err = mlx5e_gen_ip_tunnel_header((char *)ip6h + sizeof(struct ipv6hdr),
+					 &ip6h->nexthdr, e);
+	if (err)
+		goto destroy_neigh_entry;
+
+	e->encap_size = ipv6_encap_size;
+	e->encap_header = encap_header;
+
+	if (!(nud_state & NUD_VALID)) {
+		neigh_event_send(n, NULL);
+		err = -EAGAIN;
+		goto out;
+	}
+
+	err = mlx5_packet_reformat_alloc(priv->mdev,
+					 e->reformat_type,
+					 ipv6_encap_size, encap_header,
+					 MLX5_FLOW_NAMESPACE_FDB,
+					 &e->encap_id);
+	if (err)
+		goto destroy_neigh_entry;
+
+	e->flags |= MLX5_ENCAP_ENTRY_VALID;
+	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
+	neigh_release(n);
+	return err;
+
+destroy_neigh_entry:
+	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
+free_encap:
+	kfree(encap_header);
+out:
+	if (n)
+		neigh_release(n);
+	return err;
+}
+
+int mlx5e_tc_tun_get_type(struct net_device *tunnel_dev)
+{
+	if (netif_is_vxlan(tunnel_dev))
+		return MLX5E_TC_TUNNEL_TYPE_VXLAN;
+	else
+		return MLX5E_TC_TUNNEL_TYPE_UNKNOWN;
+}
+
+bool mlx5e_tc_tun_device_to_offload(struct mlx5e_priv *priv,
+				    struct net_device *netdev)
+{
+	int tunnel_type = mlx5e_tc_tun_get_type(netdev);
+
+	if (tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN &&
+	    MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
+		return true;
+	else
+		return false;
+}
+
+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)
+{
+	e->tunnel_type = mlx5e_tc_tun_get_type(tunnel_dev);
+
+	if (e->tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
+		int dst_port =  be16_to_cpu(e->tun_info.key.tp_dst);
+
+		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;
+		e->tunnel_hlen = VXLAN_HLEN;
+	} else {
+		e->reformat_type = -1;
+		e->tunnel_hlen = -1;
+		return -EOPNOTSUPP;
+	}
+	return 0;
+}
+
+static int mlx5e_tc_tun_parse_vxlan(struct mlx5e_priv *priv,
+				    struct mlx5_flow_spec *spec,
+				    struct tc_cls_flower_offload *f,
+				    void *headers_c,
+				    void *headers_v)
+{
+	struct netlink_ext_ack *extack = f->common.extack;
+	struct flow_dissector_key_ports *key =
+		skb_flow_dissector_target(f->dissector,
+					  FLOW_DISSECTOR_KEY_ENC_PORTS,
+					  f->key);
+	struct flow_dissector_key_ports *mask =
+		skb_flow_dissector_target(f->dissector,
+					  FLOW_DISSECTOR_KEY_ENC_PORTS,
+					  f->mask);
+	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);
+
+	/* Full udp dst port must be given */
+	if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS) ||
+	    memchr_inv(&mask->dst, 0xff, sizeof(mask->dst))) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "VXLAN decap filter must include enc_dst_port condition");
+		netdev_warn(priv->netdev,
+			    "VXLAN decap filter must include enc_dst_port condition\n");
+		return -EOPNOTSUPP;
+	}
+
+	/* udp dst port must be knonwn as a VXLAN port */
+	if (!mlx5_vxlan_lookup_port(priv->mdev->vxlan, be16_to_cpu(key->dst))) {
+		NL_SET_ERR_MSG_MOD(extack,
+				   "Matched UDP 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(key->dst));
+		return -EOPNOTSUPP;
+	}
+
+	/* dst UDP port is valid here */
+	MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
+	MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
+
+	MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_dport, ntohs(mask->dst));
+	MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_dport, ntohs(key->dst));
+
+	MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_sport, ntohs(mask->src));
+	MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_sport, ntohs(key->src));
+
+	/* match on VNI */
+	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
+		struct flow_dissector_key_keyid *key =
+			skb_flow_dissector_target(f->dissector,
+						  FLOW_DISSECTOR_KEY_ENC_KEYID,
+						  f->key);
+		struct flow_dissector_key_keyid *mask =
+			skb_flow_dissector_target(f->dissector,
+						  FLOW_DISSECTOR_KEY_ENC_KEYID,
+						  f->mask);
+		MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
+			 be32_to_cpu(mask->keyid));
+		MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
+			 be32_to_cpu(key->keyid));
+	}
+	return 0;
+}
+
+int mlx5e_tc_tun_parse(struct net_device *filter_dev,
+		       struct mlx5e_priv *priv,
+		       struct mlx5_flow_spec *spec,
+		       struct tc_cls_flower_offload *f,
+		       void *headers_c,
+		       void *headers_v)
+{
+	int tunnel_type;
+	int err = 0;
+
+	tunnel_type = mlx5e_tc_tun_get_type(filter_dev);
+	if (tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
+		err = mlx5e_tc_tun_parse_vxlan(priv, spec, f,
+					       headers_c, headers_v);
+	} else {
+		netdev_warn(priv->netdev,
+			    "decapsulation offload is not supported for %s net device (%d)\n",
+			    mlx5e_netdev_kind(filter_dev), tunnel_type);
+		return -EOPNOTSUPP;
+	}
+	return err;
+}

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

+/* 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"
+
+enum {
+	MLX5E_TC_TUNNEL_TYPE_UNKNOWN,
+	MLX5E_TC_TUNNEL_TYPE_VXLAN
+};
+
+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_create_header_ipv6(struct mlx5e_priv *priv,
+				    struct net_device *mirred_dev,
+				    struct mlx5e_encap_entry *e);
+
+int mlx5e_tc_tun_get_type(struct net_device *tunnel_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 tc_cls_flower_offload *f,
+		       void *headers_c,
+		       void *headers_v);
+
+#endif //__MLX5_EN_TC_TUNNEL_H__

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

@@ -42,6 +42,7 @@
 #include "en.h"
 #include "en_rep.h"
 #include "en_tc.h"
+#include "en/tc_tun.h"
 #include "fs_core.h"
 
 #define MLX5E_REP_PARAMS_LOG_SQ_SIZE \

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

@@ -44,15 +44,14 @@
 #include <net/tc_act/tc_tunnel_key.h>
 #include <net/tc_act/tc_pedit.h>
 #include <net/tc_act/tc_csum.h>
-#include <net/vxlan.h>
 #include <net/arp.h>
 #include "en.h"
 #include "en_rep.h"
 #include "en_tc.h"
 #include "eswitch.h"
-#include "lib/vxlan.h"
 #include "fs_core.h"
 #include "en/port.h"
+#include "en/tc_tun.h"
 
 struct mlx5_nic_flow_attr {
 	u32 action;
@@ -79,13 +78,6 @@ enum {
 
 #define MLX5E_TC_MAX_SPLITS 1
 
-enum {
-	MLX5E_TC_TUNNEL_TYPE_UNKNOWN,
-	MLX5E_TC_TUNNEL_TYPE_VXLAN
-};
-
-static int mlx5e_get_tunnel_type(struct net_device *tunnel_dev);
-
 struct mlx5e_tc_flow {
 	struct rhash_head	node;
 	struct mlx5e_priv	*priv;
@@ -684,14 +676,6 @@ static void mlx5e_hairpin_flow_del(struct mlx5e_priv *priv,
 	}
 }
 
-static const char *mlx5e_netdev_kind(struct net_device *dev)
-{
-	if (dev->rtnl_link_ops)
-		return dev->rtnl_link_ops->kind;
-	else
-		return "";
-}
-
 static int
 mlx5e_tc_add_nic_flow(struct mlx5e_priv *priv,
 		      struct mlx5e_tc_flow_parse_attr *parse_attr,
@@ -1209,75 +1193,6 @@ static void mlx5e_tc_del_flow(struct mlx5e_priv *priv,
 		mlx5e_tc_del_nic_flow(priv, flow);
 }
 
-static int parse_tunnel_vxlan_attr(struct mlx5e_priv *priv,
-				   struct mlx5_flow_spec *spec,
-				   struct tc_cls_flower_offload *f,
-				   void *headers_c,
-				   void *headers_v)
-{
-	struct netlink_ext_ack *extack = f->common.extack;
-	struct flow_dissector_key_ports *key =
-		skb_flow_dissector_target(f->dissector,
-					  FLOW_DISSECTOR_KEY_ENC_PORTS,
-					  f->key);
-	struct flow_dissector_key_ports *mask =
-		skb_flow_dissector_target(f->dissector,
-					  FLOW_DISSECTOR_KEY_ENC_PORTS,
-					  f->mask);
-	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);
-
-	/* Full udp dst port must be given */
-	if (!dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_PORTS) ||
-	    memchr_inv(&mask->dst, 0xff, sizeof(mask->dst))) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "VXLAN decap filter must include enc_dst_port condition");
-		netdev_warn(priv->netdev,
-			    "VXLAN decap filter must include enc_dst_port condition\n");
-		return -EOPNOTSUPP;
-	}
-
-	/* udp dst port must be knonwn as a VXLAN port */
-	if (!mlx5_vxlan_lookup_port(priv->mdev->vxlan, be16_to_cpu(key->dst))) {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "Matched UDP 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(key->dst));
-		return -EOPNOTSUPP;
-	}
-
-	/* dst UDP port is valid here */
-	MLX5_SET_TO_ONES(fte_match_set_lyr_2_4, headers_c, ip_protocol);
-	MLX5_SET(fte_match_set_lyr_2_4, headers_v, ip_protocol, IPPROTO_UDP);
-
-	MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_dport, ntohs(mask->dst));
-	MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_dport, ntohs(key->dst));
-
-	MLX5_SET(fte_match_set_lyr_2_4, headers_c, udp_sport, ntohs(mask->src));
-	MLX5_SET(fte_match_set_lyr_2_4, headers_v, udp_sport, ntohs(key->src));
-
-	/* match on VNI */
-	if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
-		struct flow_dissector_key_keyid *key =
-			skb_flow_dissector_target(f->dissector,
-						  FLOW_DISSECTOR_KEY_ENC_KEYID,
-						  f->key);
-		struct flow_dissector_key_keyid *mask =
-			skb_flow_dissector_target(f->dissector,
-						  FLOW_DISSECTOR_KEY_ENC_KEYID,
-						  f->mask);
-		MLX5_SET(fte_match_set_misc, misc_c, vxlan_vni,
-			 be32_to_cpu(mask->keyid));
-		MLX5_SET(fte_match_set_misc, misc_v, vxlan_vni,
-			 be32_to_cpu(key->keyid));
-	}
-	return 0;
-}
 
 static int parse_tunnel_attr(struct mlx5e_priv *priv,
 			     struct mlx5_flow_spec *spec,
@@ -1294,29 +1209,14 @@ static int parse_tunnel_attr(struct mlx5e_priv *priv,
 		skb_flow_dissector_target(f->dissector,
 					  FLOW_DISSECTOR_KEY_ENC_CONTROL,
 					  f->key);
-	int tunnel_type;
 	int err = 0;
 
-	tunnel_type = mlx5e_get_tunnel_type(filter_dev);
-	if (tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
-		err = parse_tunnel_vxlan_attr(priv, spec, f,
-					      headers_c, headers_v);
-	} else {
-		NL_SET_ERR_MSG_MOD(extack,
-				   "decapsulation offload is not supported");
-		netdev_warn(priv->netdev,
-			    "decapsulation offload is not supported for %s net device (%d)\n",
-			    mlx5e_netdev_kind(filter_dev), tunnel_type);
-		return -EOPNOTSUPP;
-	}
-
+	err = mlx5e_tc_tun_parse(filter_dev, priv, spec, f,
+				 headers_c, headers_v);
 	if (err) {
 		NL_SET_ERR_MSG_MOD(extack,
 				   "failed to parse tunnel attributes");
-		netdev_warn(priv->netdev,
-			    "failed to parse %s tunnel attributes (%d)\n",
-			    mlx5e_netdev_kind(filter_dev), tunnel_type);
-		return -EOPNOTSUPP;
+		return err;
 	}
 
 	if (enc_control->addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
@@ -2359,45 +2259,6 @@ static inline int hash_encap_info(struct ip_tunnel_key *key)
 	return jhash(key, sizeof(*key), 0);
 }
 
-static int mlx5e_route_lookup_ipv4(struct mlx5e_priv *priv,
-				   struct net_device *mirred_dev,
-				   struct net_device **out_dev,
-				   struct flowi4 *fl4,
-				   struct neighbour **out_n,
-				   u8 *out_ttl)
-{
-	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
-	struct mlx5e_rep_priv *uplink_rpriv;
-	struct rtable *rt;
-	struct neighbour *n = NULL;
-
-#if IS_ENABLED(CONFIG_INET)
-	int ret;
-
-	rt = ip_route_output_key(dev_net(mirred_dev), fl4);
-	ret = PTR_ERR_OR_ZERO(rt);
-	if (ret)
-		return ret;
-#else
-	return -EOPNOTSUPP;
-#endif
-	uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
-	/* if the egress device isn't on the same HW e-switch, we use the uplink */
-	if (!switchdev_port_same_parent_id(priv->netdev, rt->dst.dev))
-		*out_dev = uplink_rpriv->netdev;
-	else
-		*out_dev = rt->dst.dev;
-
-	if (!(*out_ttl))
-		*out_ttl = ip4_dst_hoplimit(&rt->dst);
-	n = dst_neigh_lookup(&rt->dst, &fl4->daddr);
-	ip_rt_put(rt);
-	if (!n)
-		return -ENOMEM;
-
-	*out_n = n;
-	return 0;
-}
 
 static bool is_merged_eswitch_dev(struct mlx5e_priv *priv,
 				  struct net_device *peer_netdev)
@@ -2413,354 +2274,7 @@ static bool is_merged_eswitch_dev(struct mlx5e_priv *priv,
 		(peer_priv->mdev->priv.eswitch->mode == SRIOV_OFFLOADS));
 }
 
-static int mlx5e_route_lookup_ipv6(struct mlx5e_priv *priv,
-				   struct net_device *mirred_dev,
-				   struct net_device **out_dev,
-				   struct flowi6 *fl6,
-				   struct neighbour **out_n,
-				   u8 *out_ttl)
-{
-	struct neighbour *n = NULL;
-	struct dst_entry *dst;
-
-#if IS_ENABLED(CONFIG_INET) && IS_ENABLED(CONFIG_IPV6)
-	struct mlx5e_rep_priv *uplink_rpriv;
-	struct mlx5_eswitch *esw = priv->mdev->priv.eswitch;
-	int ret;
-
-	ret = ipv6_stub->ipv6_dst_lookup(dev_net(mirred_dev), NULL, &dst,
-					 fl6);
-	if (ret < 0)
-		return ret;
-
-	if (!(*out_ttl))
-		*out_ttl = ip6_dst_hoplimit(dst);
-
-	uplink_rpriv = mlx5_eswitch_get_uplink_priv(esw, REP_ETH);
-	/* if the egress device isn't on the same HW e-switch, we use the uplink */
-	if (!switchdev_port_same_parent_id(priv->netdev, dst->dev))
-		*out_dev = uplink_rpriv->netdev;
-	else
-		*out_dev = dst->dev;
-#else
-	return -EOPNOTSUPP;
-#endif
-
-	n = dst_neigh_lookup(dst, &fl6->daddr);
-	dst_release(dst);
-	if (!n)
-		return -ENOMEM;
-
-	*out_n = n;
-	return 0;
-}
-
-static int mlx5e_gen_vxlan_header(char buf[], struct ip_tunnel_key *tun_key)
-{
-	__be32 tun_id = tunnel_id_to_key32(tun_key->tun_id);
-	struct udphdr *udp = (struct udphdr *)(buf);
-	struct vxlanhdr *vxh = (struct vxlanhdr *)
-			       ((char *)udp + sizeof(struct udphdr));
-
-	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_gen_ip_tunnel_header(char buf[], __u8 *ip_proto,
-				      struct mlx5e_encap_entry *e)
-{
-	int err = 0;
-	struct ip_tunnel_key *key = &e->tun_info.key;
-
-	if (e->tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
-		*ip_proto = IPPROTO_UDP;
-		err = mlx5e_gen_vxlan_header(buf, key);
-	} else {
-		pr_warn("mlx5: Cannot generate tunnel header for tunnel type (%d)\n"
-			, e->tunnel_type);
-		err = -EOPNOTSUPP;
-	}
-
-	return err;
-}
-
-static int mlx5e_create_encap_header_ipv4(struct mlx5e_priv *priv,
-					  struct net_device *mirred_dev,
-					  struct mlx5e_encap_entry *e)
-{
-	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
-	int ipv4_encap_size = ETH_HLEN +
-			      sizeof(struct iphdr) +
-			      e->tunnel_hlen;
-	struct ip_tunnel_key *tun_key = &e->tun_info.key;
-	struct net_device *out_dev;
-	struct neighbour *n = NULL;
-	struct flowi4 fl4 = {};
-	char *encap_header;
-	struct ethhdr *eth;
-	u8 nud_state, ttl;
-	struct iphdr *ip;
-	int err;
-
-	if (max_encap_size < ipv4_encap_size) {
-		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
-			       ipv4_encap_size, max_encap_size);
-		return -EOPNOTSUPP;
-	}
-
-	encap_header = kzalloc(ipv4_encap_size, GFP_KERNEL);
-	if (!encap_header)
-		return -ENOMEM;
-
-	/* add the IP fields */
-	fl4.flowi4_tos = tun_key->tos;
-	fl4.daddr = tun_key->u.ipv4.dst;
-	fl4.saddr = tun_key->u.ipv4.src;
-	ttl = tun_key->ttl;
-
-	err = mlx5e_route_lookup_ipv4(priv, mirred_dev, &out_dev,
-				      &fl4, &n, &ttl);
-	if (err)
-		goto free_encap;
-
-	/* used by mlx5e_detach_encap to lookup a neigh hash table
-	 * entry in the neigh hash table when a user deletes a rule
-	 */
-	e->m_neigh.dev = n->dev;
-	e->m_neigh.family = n->ops->family;
-	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
-	e->out_dev = out_dev;
-
-	/* It's important to add the neigh to the hash table before checking
-	 * the neigh validity state. So if we'll get a notification, in case the
-	 * neigh changes it's validity state, we would find the relevant neigh
-	 * in the hash.
-	 */
-	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
-	if (err)
-		goto free_encap;
-
-	read_lock_bh(&n->lock);
-	nud_state = n->nud_state;
-	ether_addr_copy(e->h_dest, n->ha);
-	read_unlock_bh(&n->lock);
-
-	/* add ethernet header */
-	eth = (struct ethhdr *)encap_header;
-	ether_addr_copy(eth->h_dest, e->h_dest);
-	ether_addr_copy(eth->h_source, out_dev->dev_addr);
-	eth->h_proto = htons(ETH_P_IP);
-
-	/* add ip header */
-	ip = (struct iphdr *)((char *)eth + sizeof(struct ethhdr));
-	ip->tos = tun_key->tos;
-	ip->version = 0x4;
-	ip->ihl = 0x5;
-	ip->ttl = ttl;
-	ip->daddr = fl4.daddr;
-	ip->saddr = fl4.saddr;
-
-	/* add tunneling protocol header */
-	err = mlx5e_gen_ip_tunnel_header((char *)ip + sizeof(struct iphdr),
-					  &ip->protocol, e);
-	if (err)
-		goto destroy_neigh_entry;
-
-	e->encap_size = ipv4_encap_size;
-	e->encap_header = encap_header;
-
-	if (!(nud_state & NUD_VALID)) {
-		neigh_event_send(n, NULL);
-		err = -EAGAIN;
-		goto out;
-	}
-
-	err = mlx5_packet_reformat_alloc(priv->mdev,
-					 e->reformat_type,
-					 ipv4_encap_size, encap_header,
-					 MLX5_FLOW_NAMESPACE_FDB,
-					 &e->encap_id);
-	if (err)
-		goto destroy_neigh_entry;
-
-	e->flags |= MLX5_ENCAP_ENTRY_VALID;
-	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
-	neigh_release(n);
-	return err;
-
-destroy_neigh_entry:
-	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
-free_encap:
-	kfree(encap_header);
-out:
-	if (n)
-		neigh_release(n);
-	return err;
-}
-
-static int mlx5e_create_encap_header_ipv6(struct mlx5e_priv *priv,
-					  struct net_device *mirred_dev,
-					  struct mlx5e_encap_entry *e)
-{
-	int max_encap_size = MLX5_CAP_ESW(priv->mdev, max_encap_header_size);
-	int ipv6_encap_size = ETH_HLEN +
-			      sizeof(struct ipv6hdr) +
-			      e->tunnel_hlen;
-	struct ip_tunnel_key *tun_key = &e->tun_info.key;
-	struct net_device *out_dev;
-	struct neighbour *n = NULL;
-	struct flowi6 fl6 = {};
-	struct ipv6hdr *ip6h;
-	char *encap_header;
-	struct ethhdr *eth;
-	u8 nud_state, ttl;
-	int err;
-
-	if (max_encap_size < ipv6_encap_size) {
-		mlx5_core_warn(priv->mdev, "encap size %d too big, max supported is %d\n",
-			       ipv6_encap_size, max_encap_size);
-		return -EOPNOTSUPP;
-	}
-
-	encap_header = kzalloc(ipv6_encap_size, GFP_KERNEL);
-	if (!encap_header)
-		return -ENOMEM;
-
-	ttl = tun_key->ttl;
-
-	fl6.flowlabel = ip6_make_flowinfo(RT_TOS(tun_key->tos), tun_key->label);
-	fl6.daddr = tun_key->u.ipv6.dst;
-	fl6.saddr = tun_key->u.ipv6.src;
-
-	err = mlx5e_route_lookup_ipv6(priv, mirred_dev, &out_dev,
-				      &fl6, &n, &ttl);
-	if (err)
-		goto free_encap;
-
-	/* used by mlx5e_detach_encap to lookup a neigh hash table
-	 * entry in the neigh hash table when a user deletes a rule
-	 */
-	e->m_neigh.dev = n->dev;
-	e->m_neigh.family = n->ops->family;
-	memcpy(&e->m_neigh.dst_ip, n->primary_key, n->tbl->key_len);
-	e->out_dev = out_dev;
-
-	/* It's importent to add the neigh to the hash table before checking
-	 * the neigh validity state. So if we'll get a notification, in case the
-	 * neigh changes it's validity state, we would find the relevant neigh
-	 * in the hash.
-	 */
-	err = mlx5e_rep_encap_entry_attach(netdev_priv(out_dev), e);
-	if (err)
-		goto free_encap;
-
-	read_lock_bh(&n->lock);
-	nud_state = n->nud_state;
-	ether_addr_copy(e->h_dest, n->ha);
-	read_unlock_bh(&n->lock);
-
-	/* add ethernet header */
-	eth = (struct ethhdr *)encap_header;
-	ether_addr_copy(eth->h_dest, e->h_dest);
-	ether_addr_copy(eth->h_source, out_dev->dev_addr);
-	eth->h_proto = htons(ETH_P_IPV6);
-
-	/* add ip header */
-	ip6h = (struct ipv6hdr *)((char *)eth + sizeof(struct ethhdr));
-	ip6_flow_hdr(ip6h, tun_key->tos, 0);
-	/* the HW fills up ipv6 payload len */
-	ip6h->hop_limit   = ttl;
-	ip6h->daddr	  = fl6.daddr;
-	ip6h->saddr	  = fl6.saddr;
-
-	/* add tunneling protocol header */
-	err = mlx5e_gen_ip_tunnel_header((char *)ip6h + sizeof(struct ipv6hdr),
-					 &ip6h->nexthdr, e);
-	if (err)
-		goto destroy_neigh_entry;
-
-	e->encap_size = ipv6_encap_size;
-	e->encap_header = encap_header;
-
-	if (!(nud_state & NUD_VALID)) {
-		neigh_event_send(n, NULL);
-		err = -EAGAIN;
-		goto out;
-	}
-
-	err = mlx5_packet_reformat_alloc(priv->mdev,
-					 e->reformat_type,
-					 ipv6_encap_size, encap_header,
-					 MLX5_FLOW_NAMESPACE_FDB,
-					 &e->encap_id);
-	if (err)
-		goto destroy_neigh_entry;
-
-	e->flags |= MLX5_ENCAP_ENTRY_VALID;
-	mlx5e_rep_queue_neigh_stats_work(netdev_priv(out_dev));
-	neigh_release(n);
-	return err;
-
-destroy_neigh_entry:
-	mlx5e_rep_encap_entry_detach(netdev_priv(e->out_dev), e);
-free_encap:
-	kfree(encap_header);
-out:
-	if (n)
-		neigh_release(n);
-	return err;
-}
-
-static int mlx5e_get_tunnel_type(struct net_device *tunnel_dev)
-{
-	if (netif_is_vxlan(tunnel_dev))
-		return MLX5E_TC_TUNNEL_TYPE_VXLAN;
-	else
-		return MLX5E_TC_TUNNEL_TYPE_UNKNOWN;
-}
-
-bool mlx5e_tc_tun_device_to_offload(struct mlx5e_priv *priv,
-				    struct net_device *netdev)
-{
-	int tunnel_type = mlx5e_get_tunnel_type(netdev);
-
-	if (tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN &&
-	    MLX5_CAP_ESW(priv->mdev, vxlan_encap_decap))
-		return true;
-	else
-		return false;
-}
 
-static int mlx5e_init_tunnel_attr(struct net_device *tunnel_dev,
-				  struct mlx5e_priv *priv,
-				  struct mlx5e_encap_entry *e,
-				  struct netlink_ext_ack *extack)
-{
-	e->tunnel_type = mlx5e_get_tunnel_type(tunnel_dev);
-
-	if (e->tunnel_type == MLX5E_TC_TUNNEL_TYPE_VXLAN) {
-		int dst_port =  be16_to_cpu(e->tun_info.key.tp_dst);
-
-		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;
-		e->tunnel_hlen = VXLAN_HLEN;
-	} else {
-		e->reformat_type = -1;
-		e->tunnel_hlen = -1;
-		return -EOPNOTSUPP;
-	}
-	return 0;
-}
 
 static int mlx5e_attach_encap(struct mlx5e_priv *priv,
 			      struct ip_tunnel_info *tun_info,
@@ -2797,16 +2311,16 @@ static int mlx5e_attach_encap(struct mlx5e_priv *priv,
 		return -ENOMEM;
 
 	e->tun_info = *tun_info;
-	err = mlx5e_init_tunnel_attr(mirred_dev, priv, e, extack);
+	err = mlx5e_tc_tun_init_encap_attr(mirred_dev, priv, e, extack);
 	if (err)
 		goto out_err;
 
 	INIT_LIST_HEAD(&e->flows);
 
 	if (family == AF_INET)
-		err = mlx5e_create_encap_header_ipv4(priv, mirred_dev, e);
+		err = mlx5e_tc_tun_create_header_ipv4(priv, mirred_dev, e);
 	else if (family == AF_INET6)
-		err = mlx5e_create_encap_header_ipv6(priv, mirred_dev, e);
+		err = mlx5e_tc_tun_create_header_ipv6(priv, mirred_dev, e);
 
 	if (err && err != -EAGAIN)
 		goto out_err;

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

@@ -70,8 +70,6 @@ void mlx5e_tc_update_neigh_used_value(struct mlx5e_neigh_hash_entry *nhe);
 
 int mlx5e_tc_num_filters(struct mlx5e_priv *priv);
 
-bool mlx5e_tc_tun_device_to_offload(struct mlx5e_priv *priv,
-				    struct net_device *netdev);
 
 #else /* CONFIG_MLX5_ESWITCH */
 static inline int  mlx5e_tc_nic_init(struct mlx5e_priv *priv) { return 0; }