nfp: flower: add helper functions for tunnel classification

Adds IPv4 address and TTL/TOS helper functions, which is done in
preparation for compiling new tunnel types.
Signed-off-by: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Reviewed-by: John Hurley <john.hurley@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -354,6 +354,16 @@ struct nfp_flower_ipv6 {
 	struct in6_addr ipv6_dst;
 };
 
+struct nfp_flower_tun_ipv4 {
+	__be32 src;
+	__be32 dst;
+};
+
+struct nfp_flower_tun_ip_ext {
+	u8 tos;
+	u8 ttl;
+};
+
 /* Flow Frame IPv4 UDP TUNNEL --> Tunnel details (4W/16B)
  * -----------------------------------------------------------------
  *    3                   2                   1
@@ -371,11 +381,9 @@ struct nfp_flower_ipv6 {
  * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  */
 struct nfp_flower_ipv4_udp_tun {
-	__be32 ip_src;
-	__be32 ip_dst;
+	struct nfp_flower_tun_ipv4 ipv4;
 	__be16 reserved1;
-	u8 tos;
-	u8 ttl;
+	struct nfp_flower_tun_ip_ext ip_ext;
 	__be32 reserved2;
 	__be32 tun_id;
 };

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

@@ -280,6 +280,42 @@ nfp_flower_compile_geneve_opt(void *ext, void *msk,
 	return 0;
 }
 
+static void
+nfp_flower_compile_tun_ipv4_addrs(struct nfp_flower_tun_ipv4 *ext,
+				  struct nfp_flower_tun_ipv4 *msk,
+				  struct tc_cls_flower_offload *flow)
+{
+	struct flow_rule *rule = tc_cls_flower_offload_flow_rule(flow);
+
+	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
+		struct flow_match_ipv4_addrs match;
+
+		flow_rule_match_enc_ipv4_addrs(rule, &match);
+		ext->src = match.key->src;
+		ext->dst = match.key->dst;
+		msk->src = match.mask->src;
+		msk->dst = match.mask->dst;
+	}
+}
+
+static void
+nfp_flower_compile_tun_ip_ext(struct nfp_flower_tun_ip_ext *ext,
+			      struct nfp_flower_tun_ip_ext *msk,
+			      struct tc_cls_flower_offload *flow)
+{
+	struct flow_rule *rule = tc_cls_flower_offload_flow_rule(flow);
+
+	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IP)) {
+		struct flow_match_ip match;
+
+		flow_rule_match_enc_ip(rule, &match);
+		ext->tos = match.key->tos;
+		ext->ttl = match.key->ttl;
+		msk->tos = match.mask->tos;
+		msk->ttl = match.mask->ttl;
+	}
+}
+
 static void
 nfp_flower_compile_ipv4_udp_tun(struct nfp_flower_ipv4_udp_tun *ext,
 				struct nfp_flower_ipv4_udp_tun *msk,
@@ -301,25 +337,8 @@ nfp_flower_compile_ipv4_udp_tun(struct nfp_flower_ipv4_udp_tun *ext,
 		msk->tun_id = cpu_to_be32(temp_vni);
 	}
 
-	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
-		struct flow_match_ipv4_addrs match;
-
-		flow_rule_match_enc_ipv4_addrs(rule, &match);
-		ext->ip_src = match.key->src;
-		ext->ip_dst = match.key->dst;
-		msk->ip_src = match.mask->src;
-		msk->ip_dst = match.mask->dst;
-	}
-
-	if (flow_rule_match_key(rule, FLOW_DISSECTOR_KEY_ENC_IP)) {
-		struct flow_match_ip match;
-
-		flow_rule_match_enc_ip(rule, &match);
-		ext->tos = match.key->tos;
-		ext->ttl = match.key->ttl;
-		msk->tos = match.mask->tos;
-		msk->ttl = match.mask->ttl;
-	}
+	nfp_flower_compile_tun_ipv4_addrs(&ext->ipv4, &msk->ipv4, flow);
+	nfp_flower_compile_tun_ip_ext(&ext->ip_ext, &msk->ip_ext, flow);
 }
 
 int nfp_flower_compile_flow_match(struct nfp_app *app,
@@ -411,7 +430,7 @@ int nfp_flower_compile_flow_match(struct nfp_app *app,
 		__be32 tun_dst;
 
 		nfp_flower_compile_ipv4_udp_tun((void *)ext, (void *)msk, flow);
-		tun_dst = ((struct nfp_flower_ipv4_udp_tun *)ext)->ip_dst;
+		tun_dst = ((struct nfp_flower_ipv4_udp_tun *)ext)->ipv4.dst;
 		ext += sizeof(struct nfp_flower_ipv4_udp_tun);
 		msk += sizeof(struct nfp_flower_ipv4_udp_tun);