Merge branch 'nfp-flower-add-Geneve-tunnel-support'

Simon Horman says:

====================
nfp: flower: add Geneve tunnel support

John Hurley says:

This patchset adds support for offloading the encap and decap of Geneve
tunnels to the NFP. In both cases, specifying well known port 6081 is a
requirement for rule offload.

Geneve firmware support has been recently added, so the patchset includes
the reading of a fw symbol that defines a bitmap of newly supported
features. Geneve will only be offloaded if the fw supports it. The new
symbol is added in fw r5646.

Geneve option fields are not supported as either a match or an action due
there current exclussion from TC flower. Because Geneve (as both a match
and action) behaves the same as other udp tunnels such as VXLAN, generic
functions are created that handle both Geneve and VXLAN. It is anticapated
that these functions will be modified to support options in future
patches.

The removal of an unused variable 'tun_dst_mask' is included as a separate
patch here. This does not affect functionality.

Also included are modifications to the test framework to check that the
new encap and decap features are functioning correctly.
====================

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;