nfp: flower: remove dead code paths

Port matching is selected by default on every rule so remove check for it
and delete 'else' side of the statement. Remove nfp_flower_meta_one as now
it will not feature in the code. Rename nfp_flower_meta_two given that one
has been removed.

'Additional metadata' if statement can never be true so remove it as well.
Signed-off-by: John Hurley <john.hurley@netronome.com>
Reviewed-by: Dirk van der Merwe <dirk.vandermerwe@netronome.com>
Reviewed-by: Jakub Kicinski <jakub.kicinski@netronome.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

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

@@ -165,20 +165,6 @@ struct nfp_fl_pop_vlan {
 	__be16 reserved;
 };
 
-/* Metadata without L2 (1W/4B)
- * ----------------------------------------------------------------
- *    3                   2                   1
- *  1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- * |  key_layers   |    mask_id    |           reserved            |
- * +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
- */
-struct nfp_flower_meta_one {
-	u8 nfp_flow_key_layer;
-	u8 mask_id;
-	u16 reserved;
-};
-
 struct nfp_fl_pre_tunnel {
 	struct nfp_fl_act_head head;
 	__be16 reserved;
@@ -209,7 +195,7 @@ struct nfp_fl_set_vxlan {
  *                           NOTE: |             TCI               |
  *                                 +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
  */
-struct nfp_flower_meta_two {
+struct nfp_flower_meta_tci {
 	u8 nfp_flow_key_layer;
 	u8 mask_id;
 	__be16 tci;

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

@@ -38,7 +38,7 @@
 #include "main.h"
 
 static void
-nfp_flower_compile_meta_tci(struct nfp_flower_meta_two *frame,
+nfp_flower_compile_meta_tci(struct nfp_flower_meta_tci *frame,
 			    struct tc_cls_flower_offload *flow, u8 key_type,
 			    bool mask_version)
 {
@@ -46,7 +46,7 @@ nfp_flower_compile_meta_tci(struct nfp_flower_meta_two *frame,
 	struct flow_dissector_key_vlan *flow_vlan;
 	u16 tmp_tci;
 
-	memset(frame, 0, sizeof(struct nfp_flower_meta_two));
+	memset(frame, 0, sizeof(struct nfp_flower_meta_tci));
 	/* Populate the metadata frame. */
 	frame->nfp_flow_key_layer = key_type;
 	frame->mask_id = ~0;
@@ -67,14 +67,6 @@ nfp_flower_compile_meta_tci(struct nfp_flower_meta_two *frame,
 	}
 }
 
-static void
-nfp_flower_compile_meta(struct nfp_flower_meta_one *frame, u8 key_type)
-{
-	frame->nfp_flow_key_layer = key_type;
-	frame->mask_id = 0;
-	frame->reserved = 0;
-}
-
 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)
@@ -278,15 +270,15 @@ int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 
 	ext = nfp_flow->unmasked_data;
 	msk = nfp_flow->mask_data;
-	if (NFP_FLOWER_LAYER_PORT & key_ls->key_layer) {
+
 	/* Populate Exact Metadata. */
-		nfp_flower_compile_meta_tci((struct nfp_flower_meta_two *)ext,
+	nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)ext,
 				    flow, key_ls->key_layer, false);
 	/* Populate Mask Metadata. */
-		nfp_flower_compile_meta_tci((struct nfp_flower_meta_two *)msk,
+	nfp_flower_compile_meta_tci((struct nfp_flower_meta_tci *)msk,
 				    flow, key_ls->key_layer, true);
-		ext += sizeof(struct nfp_flower_meta_two);
-		msk += sizeof(struct nfp_flower_meta_two);
+	ext += sizeof(struct nfp_flower_meta_tci);
+	msk += sizeof(struct nfp_flower_meta_tci);
 
 	/* Populate Exact Port data. */
 	err = nfp_flower_compile_port((struct nfp_flower_in_port *)ext,
@@ -304,23 +296,6 @@ int nfp_flower_compile_flow_match(struct tc_cls_flower_offload *flow,
 
 	ext += sizeof(struct nfp_flower_in_port);
 	msk += sizeof(struct nfp_flower_in_port);
-	} else {
-		/* Populate Exact Metadata. */
-		nfp_flower_compile_meta((struct nfp_flower_meta_one *)ext,
-					key_ls->key_layer);
-		/* Populate Mask Metadata. */
-		nfp_flower_compile_meta((struct nfp_flower_meta_one *)msk,
-					key_ls->key_layer);
-		ext += sizeof(struct nfp_flower_meta_one);
-		msk += sizeof(struct nfp_flower_meta_one);
-	}
-
-	if (NFP_FLOWER_LAYER_META & key_ls->key_layer) {
-		/* Additional Metadata Fields.
-		 * Currently unsupported.
-		 */
-		return -EOPNOTSUPP;
-	}
 
 	if (NFP_FLOWER_LAYER_MAC & key_ls->key_layer) {
 		/* Populate Exact MAC Data. */

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

@@ -151,7 +151,7 @@ nfp_flower_calculate_key_layers(struct nfp_fl_key_ls *ret_key_ls,
 
 	key_layer_two = 0;
 	key_layer = NFP_FLOWER_LAYER_PORT;
-	key_size = sizeof(struct nfp_flower_meta_one) +
+	key_size = sizeof(struct nfp_flower_meta_tci) +
 		   sizeof(struct nfp_flower_in_port);
 
 	if (dissector_uses_key(flow->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS) ||