[PATCH net-next 4/4] nfp: flower: compile Geneve encap actions

[Simon Horman <simon.horman@netronome.com>]

From: John Hurley <john.hurley@netronome.com>

Generate rules for the NFP to encapsulate packets in Geneve tunnels. Move
the vxlan action code to generic udp tunnel actions and use core code for
both vxlan and Geneve.

Only support outputting to well known port 6081. Setting tunnel options
is not supported yet.

Only attempt to offload if the fw supports Geneve.

Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: Simon Horman <simon.horman@netronome.com>
---
 drivers/net/ethernet/netronome/nfp/flower/action.c | 75 +++++++++++++---------
 drivers/net/ethernet/netronome/nfp/flower/cmsg.h   | 11 ++--
 2 files changed, 48 insertions(+), 38 deletions(-)

diff --git a/drivers/net/ethernet/netronome/nfp/flower/action.c b/drivers/net/ethernet/netronome/nfp/flower/action.c
index ca74c517f626..b3567a596fc1 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/action.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/action.c
@@ -81,6 +81,9 @@ static bool nfp_fl_netdev_is_tunnel_type(struct net_device *out_dev,
 	if (!strcmp(out_dev->rtnl_link_ops->kind, "vxlan"))
 		return tun_type == NFP_FL_TUNNEL_VXLAN;
 
+	if (!strcmp(out_dev->rtnl_link_ops->kind, "geneve"))
+		return tun_type == NFP_FL_TUNNEL_GENEVE;
+
 	return false;
 }
 
@@ -136,11 +139,23 @@ nfp_fl_output(struct nfp_fl_output *output, const struct tc_action *action,
 	return 0;
 }
 
-static bool nfp_fl_supported_tun_port(const struct tc_action *action)
+static enum nfp_flower_tun_type
+nfp_fl_get_tun_from_act_l4_port(struct nfp_app *app,
+				const struct tc_action *action)
 {
 	struct ip_tunnel_info *tun = tcf_tunnel_info(action);
-
-	return tun->key.tp_dst == htons(NFP_FL_VXLAN_PORT);
+	struct nfp_flower_priv *priv = app->priv;
+
+	switch (tun->key.tp_dst) {
+	case htons(NFP_FL_VXLAN_PORT):
+		return NFP_FL_TUNNEL_VXLAN;
+	case htons(NFP_FL_GENEVE_PORT):
+		if (priv->flower_ext_feats & NFP_FL_FEATS_GENEVE)
+			return NFP_FL_TUNNEL_GENEVE;
+		/* FALLTHROUGH */
+	default:
+		return NFP_FL_TUNNEL_NONE;
+	}
 }
 
 static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
@@ -165,38 +180,33 @@ static struct nfp_fl_pre_tunnel *nfp_fl_pre_tunnel(char *act_data, int act_len)
 }
 
 static int
-nfp_fl_set_vxlan(struct nfp_fl_set_vxlan *set_vxlan,
-		 const struct tc_action *action,
-		 struct nfp_fl_pre_tunnel *pre_tun)
+nfp_fl_set_ipv4_udp_tun(struct nfp_fl_set_ipv4_udp_tun *set_tun,
+			const struct tc_action *action,
+			struct nfp_fl_pre_tunnel *pre_tun,
+			enum nfp_flower_tun_type tun_type)
 {
-	struct ip_tunnel_info *vxlan = tcf_tunnel_info(action);
-	size_t act_size = sizeof(struct nfp_fl_set_vxlan);
-	u32 tmp_set_vxlan_type_index = 0;
+	size_t act_size = sizeof(struct nfp_fl_set_ipv4_udp_tun);
+	struct ip_tunnel_info *ip_tun = tcf_tunnel_info(action);
+	u32 tmp_set_ip_tun_type_index = 0;
 	/* Currently support one pre-tunnel so index is always 0. */
 	int pretun_idx = 0;
 
-	if (vxlan->options_len) {
-		/* Do not support options e.g. vxlan gpe. */
+	if (ip_tun->options_len)
 		return -EOPNOTSUPP;
-	}
 
-	set_vxlan->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
-	set_vxlan->head.len_lw = act_size >> NFP_FL_LW_SIZ;
+	set_tun->head.jump_id = NFP_FL_ACTION_OPCODE_SET_IPV4_TUNNEL;
+	set_tun->head.len_lw = act_size >> NFP_FL_LW_SIZ;
 
 	/* Set tunnel type and pre-tunnel index. */
-	tmp_set_vxlan_type_index |=
-		FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, NFP_FL_TUNNEL_VXLAN) |
+	tmp_set_ip_tun_type_index |=
+		FIELD_PREP(NFP_FL_IPV4_TUNNEL_TYPE, tun_type) |
 		FIELD_PREP(NFP_FL_IPV4_PRE_TUN_INDEX, pretun_idx);
 
-	set_vxlan->tun_type_index = cpu_to_be32(tmp_set_vxlan_type_index);
-
-	set_vxlan->tun_id = vxlan->key.tun_id;
-	set_vxlan->tun_flags = vxlan->key.tun_flags;
-	set_vxlan->ipv4_ttl = vxlan->key.ttl;
-	set_vxlan->ipv4_tos = vxlan->key.tos;
+	set_tun->tun_type_index = cpu_to_be32(tmp_set_ip_tun_type_index);
+	set_tun->tun_id = ip_tun->key.tun_id;
 
 	/* Complete pre_tunnel action. */
-	pre_tun->ipv4_dst = vxlan->key.u.ipv4.dst;
+	pre_tun->ipv4_dst = ip_tun->key.u.ipv4.dst;
 
 	return 0;
 }
@@ -433,8 +443,8 @@ nfp_flower_loop_action(const struct tc_action *a,
 		       struct net_device *netdev,
 		       enum nfp_flower_tun_type *tun_type, int *tun_out_cnt)
 {
+	struct nfp_fl_set_ipv4_udp_tun *set_tun;
 	struct nfp_fl_pre_tunnel *pre_tun;
-	struct nfp_fl_set_vxlan *s_vxl;
 	struct nfp_fl_push_vlan *psh_v;
 	struct nfp_fl_pop_vlan *pop_v;
 	struct nfp_fl_output *output;
@@ -482,26 +492,29 @@ nfp_flower_loop_action(const struct tc_action *a,
 
 		nfp_fl_push_vlan(psh_v, a);
 		*a_len += sizeof(struct nfp_fl_push_vlan);
-	} else if (is_tcf_tunnel_set(a) && nfp_fl_supported_tun_port(a)) {
+	} else if (is_tcf_tunnel_set(a)) {
+		struct nfp_repr *repr = netdev_priv(netdev);
+		*tun_type = nfp_fl_get_tun_from_act_l4_port(repr->app, a);
+		if (*tun_type == NFP_FL_TUNNEL_NONE)
+			return -EOPNOTSUPP;
+
 		/* Pre-tunnel action is required for tunnel encap.
 		 * This checks for next hop entries on NFP.
 		 * If none, the packet falls back before applying other actions.
 		 */
 		if (*a_len + sizeof(struct nfp_fl_pre_tunnel) +
-		    sizeof(struct nfp_fl_set_vxlan) > NFP_FL_MAX_A_SIZ)
+		    sizeof(struct nfp_fl_set_ipv4_udp_tun) > NFP_FL_MAX_A_SIZ)
 			return -EOPNOTSUPP;
 
-		*tun_type = NFP_FL_TUNNEL_VXLAN;
 		pre_tun = nfp_fl_pre_tunnel(nfp_fl->action_data, *a_len);
 		nfp_fl->meta.shortcut = cpu_to_be32(NFP_FL_SC_ACT_NULL);
 		*a_len += sizeof(struct nfp_fl_pre_tunnel);
 
-		s_vxl = (struct nfp_fl_set_vxlan *)&nfp_fl->action_data[*a_len];
-		err = nfp_fl_set_vxlan(s_vxl, a, pre_tun);
+		set_tun = (void *)&nfp_fl->action_data[*a_len];
+		err = nfp_fl_set_ipv4_udp_tun(set_tun, a, pre_tun, *tun_type);
 		if (err)
 			return err;
-
-		*a_len += sizeof(struct nfp_fl_set_vxlan);
+		*a_len += sizeof(struct nfp_fl_set_ipv4_udp_tun);
 	} else if (is_tcf_tunnel_release(a)) {
 		/* Tunnel decap is handled by default so accept action. */
 		return 0;
diff --git a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
index 2e71c32690e9..992d2eec1019 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
+++ b/drivers/net/ethernet/netronome/nfp/flower/cmsg.h
@@ -173,16 +173,13 @@ struct nfp_fl_pre_tunnel {
 	__be32 extra[3];
 };
 
-struct nfp_fl_set_vxlan {
+struct nfp_fl_set_ipv4_udp_tun {
 	struct nfp_fl_act_head head;
 	__be16 reserved;
-	__be64 tun_id;
+	__be64 tun_id __packed;
 	__be32 tun_type_index;
-	__be16 tun_flags;
-	u8 ipv4_ttl;
-	u8 ipv4_tos;
-	__be32 extra[2];
-} __packed;
+	__be32 extra[3];
+};
 
 /* Metadata with L2 (1W/4B)
  * ----------------------------------------------------------------
-- 
2.11.0