nfp: flower: compile Geneve match fields

Compile Geneve match fields for offloading to the NFP. The addition of
Geneve overflows the 8 bit key_layer field, so apply extended metadata to
the match cmsg allowing up to 32 more key_layer fields.

Rather than adding new Geneve blocks, move the vxlan code to generic ipv4
udp tunnel structs and use these for both vxlan and Geneve.

Matches are only supported when specifically mentioning well known port
6081. Geneve tunnel options are not yet included in the match.

Only offload Geneve if the fw supports it - include check for this.

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>
Signed-off-by: David S. Miller <davem@davemloft.net>

1 files changed, 29 insertions, 8 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/flower/offload.c b/drivers/net/ethernet/netronome/nfp/flower/offload.c
index 98fb1cba3ed9..837134a9137c 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -130,12 +130,15 @@ static bool nfp_flower_check_higher_than_mac(struct tc_cls_flower_offload *f)
 }
 
 static int
-nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
+nfp_flower_calculate_key_layers(struct nfp_app *app,
+				struct nfp_fl_key_ls *ret_key_ls,
 				struct tc_cls_flower_offload *flow,
-				bool egress)
+				bool egress,
+				enum nfp_flower_tun_type *tun_type)
 {
 	struct flow_dissector_key_basic *mask_basic = NULL;
 	struct flow_dissector_key_basic *key_basic = NULL;
+	struct nfp_flower_priv *priv = app->priv;
 	u32 key_layer_two;
 	u8 key_layer;
 	int key_size;
@@ -197,12 +200,27 @@ nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
 						  FLOW_DISSECTOR_KEY_ENC_PORTS,
 						  flow->key);
 
-		if (mask_enc_ports->dst != cpu_to_be16(~0) ||
-		    enc_ports->dst != htons(NFP_FL_VXLAN_PORT))
+		if (mask_enc_ports->dst != cpu_to_be16(~0))
 			return -EOPNOTSUPP;
 
-		key_layer |= NFP_FLOWER_LAYER_VXLAN;
-		key_size += sizeof(struct nfp_flower_vxlan);
+		switch (enc_ports->dst) {
+		case htons(NFP_FL_VXLAN_PORT):
+			*tun_type = NFP_FL_TUNNEL_VXLAN;
+			key_layer |= NFP_FLOWER_LAYER_VXLAN;
+			key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
+			break;
+		case htons(NFP_FL_GENEVE_PORT):
+			if (!(priv->flower_ext_feats & NFP_FL_FEATS_GENEVE))
+				return -EOPNOTSUPP;
+			*tun_type = NFP_FL_TUNNEL_GENEVE;
+			key_layer |= NFP_FLOWER_LAYER_EXT_META;
+			key_size += sizeof(struct nfp_flower_ext_meta);
+			key_layer_two |= NFP_FLOWER_LAYER2_GENEVE;
+			key_size += sizeof(struct nfp_flower_ipv4_udp_tun);
+			break;
+		default:
+			return -EOPNOTSUPP;
+		}
 	} else if (egress) {
 		/* Reject non tunnel matches offloaded to egress repr. */
 		return -EOPNOTSUPP;
@@ -330,6 +348,7 @@ static int
 nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 		       struct tc_cls_flower_offload *flow, bool egress)
 {
+	enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
 	struct nfp_flower_priv *priv = app->priv;
 	struct nfp_fl_payload *flow_pay;
 	struct nfp_fl_key_ls *key_layer;
@@ -339,7 +358,8 @@ nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 	if (!key_layer)
 		return -ENOMEM;
 
-	err = nfp_flower_calculate_key_layers(key_layer, flow, egress);
+	err = nfp_flower_calculate_key_layers(app, key_layer, flow, egress,
+					      &tun_type);
 	if (err)
 		goto err_free_key_ls;
 
@@ -349,7 +369,8 @@ nfp_flower_add_offload(struct nfp_app *app, struct net_device *netdev,
 		goto err_free_key_ls;
 	}
 
-	err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay);
+	err = nfp_flower_compile_flow_match(flow, key_layer, netdev, flow_pay,
+					    tun_type);
 	if (err)
 		goto err_destroy_flow;