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, 33 insertions, 22 deletions

diff --git a/drivers/net/ethernet/netronome/nfp/flower/match.c b/drivers/net/ethernet/netronome/nfp/flower/match.c
index e3b10b34035b..37c2ecae2a7a 100644
--- a/drivers/net/ethernet/netronome/nfp/flower/match.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/match.c
@@ -67,6 +67,12 @@ nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *frame,
 	}
 }
 
+static void
+nfp_flower_compile_ext_meta(struct nfp_flower_ext_meta *frame, u32 key_ext)
+{
+	frame->nfp_flow_key_layer2 = cpu_to_be32(key_ext);
+}
+
 static int
 nfp_flower_compile_port(struct nfp_flower_in_port *frame, u32 cmsg_port,
 			bool mask_version, enum nfp_flower_tun_type tun_type)
@@ -216,16 +222,15 @@ nfp_flower_compile_ipv6(struct nfp_flower_ipv6 *frame,
 }
 
 static void
-nfp_flower_compile_vxlan(struct nfp_flower_vxlan *frame,
-			 struct tc_cls_flower_offload *flow,
-			 bool mask_version)
+nfp_flower_compile_ipv4_udp_tun(struct nfp_flower_ipv4_udp_tun *frame,
+				struct tc_cls_flower_offload *flow,
+				bool mask_version)
 {
 	struct fl_flow_key *target = mask_version ? flow->mask : flow->key;
-	struct flow_dissector_key_ipv4_addrs *vxlan_ips;
+	struct flow_dissector_key_ipv4_addrs *tun_ips;
 	struct flow_dissector_key_keyid *vni;
 
-	/* Wildcard TOS/TTL/GPE_FLAGS/NXT_PROTO for now. */
-	memset(frame, 0, sizeof(struct nfp_flower_vxlan));
+	memset(frame, 0, sizeof(struct nfp_flower_ipv4_udp_tun));
 
 	if (dissector_uses_key(flow->dissector,
 			       FLOW_DISSECTOR_KEY_ENC_KEYID)) {
@@ -240,29 +245,26 @@ nfp_flower_compile_vxlan(struct nfp_flower_vxlan *frame,
 
 	if (dissector_uses_key(flow->dissector,
 			       FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS)) {
-		vxlan_ips =
+		tun_ips =
 		   skb_flow_dissector_target(flow->dissector,
 					     FLOW_DISSECTOR_KEY_ENC_IPV4_ADDRS,
 					     target);
-		frame->ip_src = vxlan_ips->src;
-		frame->ip_dst = vxlan_ips->dst;
+		frame->ip_src = tun_ips->src;
+		frame->ip_dst = tun_ips->dst;
 	}
 }
 
 int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 				  struct nfp_fl_key_ls *key_ls,
 				  struct net_device *netdev,
-				  struct nfp_fl_payload *nfp_flow)
+				  struct nfp_fl_payload *nfp_flow,
+				  enum nfp_flower_tun_type tun_type)
 {
-	enum nfp_flower_tun_type tun_type = NFP_FL_TUNNEL_NONE;
 	struct nfp_repr *netdev_repr;
 	int err;
 	u8 *ext;
 	u8 *msk;
 
-	if (key_ls->key_layer & NFP_FLOWER_LAYER_VXLAN)
-		tun_type = NFP_FL_TUNNEL_VXLAN;
-
 	memset(nfp_flow->unmasked_data, 0, key_ls->key_size);
 	memset(nfp_flow->mask_data, 0, key_ls->key_size);
 
@@ -278,6 +280,16 @@ int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 	ext += sizeof(struct nfp_flower_meta_tci);
 	msk += sizeof(struct nfp_flower_meta_tci);
 
+	/* Populate Extended Metadata if Required. */
+	if (NFP_FLOWER_LAYER_EXT_META & key_ls->key_layer) {
+		nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)ext,
+					    key_ls->key_layer_two);
+		nfp_flower_compile_ext_meta((struct nfp_flower_ext_meta *)msk,
+					    key_ls->key_layer_two);
+		ext += sizeof(struct nfp_flower_ext_meta);
+		msk += sizeof(struct nfp_flower_ext_meta);
+	}
+
 	/* Populate Exact Port data. */
 	err = nfp_flower_compile_port((struct nfp_flower_in_port *)ext,
 				      nfp_repr_get_port_id(netdev),
@@ -339,18 +351,17 @@ int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 		msk += sizeof(struct nfp_flower_ipv6);
 	}
 
-	if (key_ls->key_layer & NFP_FLOWER_LAYER_VXLAN) {
+	if (key_ls->key_layer & NFP_FLOWER_LAYER_VXLAN ||
+	    key_ls->key_layer_two & NFP_FLOWER_LAYER2_GENEVE) {
 		__be32 tun_dst;
 
 		/* Populate Exact VXLAN Data. */
-		nfp_flower_compile_vxlan((struct nfp_flower_vxlan *)ext,
-					 flow, false);
+		nfp_flower_compile_ipv4_udp_tun((void *)ext, flow, false);
 		/* Populate Mask VXLAN Data. */
-		nfp_flower_compile_vxlan((struct nfp_flower_vxlan *)msk,
-					 flow, true);
-		tun_dst = ((struct nfp_flower_vxlan *)ext)->ip_dst;
-		ext += sizeof(struct nfp_flower_vxlan);
-		msk += sizeof(struct nfp_flower_vxlan);
+		nfp_flower_compile_ipv4_udp_tun((void *)msk, flow, true);
+		tun_dst = ((struct nfp_flower_ipv4_udp_tun *)ext)->ip_dst;
+		ext += sizeof(struct nfp_flower_ipv4_udp_tun);
+		msk += sizeof(struct nfp_flower_ipv4_udp_tun);
 
 		/* Configure tunnel end point MAC. */
 		if (nfp_netdev_is_nfp_repr(netdev)) {