nfp: flower: fix vlan match by checking both vlan id and vlan pcp

Previously we only checked if the vlan id field is present when trying
to match a vlan tag. The vlan id and vlan pcp field should be treated
independently.

Fixes: 5571e8c9 ("nfp: extend flower matching capabilities")
Signed-off-by: NPieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: NJakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: NDavid S. Miller <davem@davemloft.net>

drivers/net/ethernet/netronome/nfp/flower/main.h

@@ -70,6 +70,7 @@ struct nfp_app;
 #define NFP_FL_FEATS_GENEVE		BIT(0)
 #define NFP_FL_NBI_MTU_SETTING		BIT(1)
 #define NFP_FL_FEATS_GENEVE_OPT		BIT(2)
+#define NFP_FL_FEATS_VLAN_PCP		BIT(3)
 #define NFP_FL_FEATS_LAG		BIT(31)
 
 struct nfp_fl_mask_id {

drivers/net/ethernet/netronome/nfp/flower/match.c

@@ -56,7 +56,7 @@ nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *frame,
 						      FLOW_DISSECTOR_KEY_VLAN,
 						      target);
 		/* Populate the tci field. */
-		if (flow_vlan->vlan_id) {
+		if (flow_vlan->vlan_id || flow_vlan->vlan_priority) {
 			tmp_tci = FIELD_PREP(NFP_FLOWER_MASK_VLAN_PRIO,
 					     flow_vlan->vlan_priority) |
 				  FIELD_PREP(NFP_FLOWER_MASK_VLAN_VID,

drivers/net/ethernet/netronome/nfp/flower/offload.c

@@ -192,6 +192,17 @@ nfp_flower_calculate_key_layers(struct nfp_app *app,
 		key_size += sizeof(struct nfp_flower_mac_mpls);
 	}
 
+	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
+		struct flow_dissector_key_vlan *flow_vlan;
+
+		flow_vlan = skb_flow_dissector_target(flow->dissector,
+						      FLOW_DISSECTOR_KEY_VLAN,
+						      flow->mask);
+		if (!(priv->flower_ext_feats & NFP_FL_FEATS_VLAN_PCP) &&
+		    flow_vlan->vlan_priority)
+			return -EOPNOTSUPP;
+	}
+
 	if (dissector_uses_key(flow->dissector,
 			       FLOW_DISSECTOR_KEY_ENC_CONTROL)) {
 		struct flow_dissector_key_ipv4_addrs *mask_ipv4 = NULL;