nfp: add IPv6 ttl and tos match offloading support

Previously matching on IPv6 ttl and tos fields were not offloaded. This
patch enables offloading IPv6 ttl and tos as match fields.

Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@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>

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

@@ -194,7 +194,6 @@ nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame,
 	struct flow_dissector_key_ipv6_addrs *addr;
 	struct flow_dissector_key_basic *basic;
 
-	/* Wildcard LABEL/TOS/TTL for now. */
 	memset(frame, 0, sizeof(struct nfp_flower_ipv6));
 
 	if (dissector_uses_key(flow->dissector,
@@ -212,6 +211,16 @@ nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame,
 						  target);
 		frame->proto = basic->ip_proto;
 	}
+
+	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_IP)) {
+		struct flow_dissector_key_ip *flow_ip;
+
+		flow_ip = skb_flow_dissector_target(flow->dissector,
+						    FLOW_DISSECTOR_KEY_IP,
+						    target);
+		frame->tos = flow_ip->tos;
+		frame->ttl = flow_ip->ttl;
+	}
 }
 
 static void

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

@@ -135,7 +135,6 @@ nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
 {
 	struct flow_dissector_key_basic *mask_basic = NULL;
 	struct flow_dissector_key_basic *key_basic = NULL;
-	struct flow_dissector_key_ip *mask_ip = NULL;
 	u32 key_layer_two;
 	u8 key_layer;
 	int key_size;
@@ -207,11 +206,6 @@ nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
 						      flow->key);
 	}
 
-	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_IP))
-		mask_ip = skb_flow_dissector_target(flow->dissector,
-						    FLOW_DISSECTOR_KEY_IP,
-						    flow->mask);
-
 	if (mask_basic && mask_basic->n_proto) {
 		/* Ethernet type is present in the key. */
 		switch (key_basic->n_proto) {
@@ -221,10 +215,6 @@ nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
 			break;
 
 		case cpu_to_be16(ETH_P_IPV6):
-			if (mask_ip && mask_ip->tos)
-				return -EOPNOTSUPP;
-			if (mask_ip && mask_ip->ttl)
-				return -EOPNOTSUPP;
 			key_layer |= NFP_FLOWER_LAYER_IPV6;
 			key_size += sizeof(struct nfp_flower_ipv6);
 			break;