From: Pieter Jansen van Vuuren <pieter.jansenvanvuuren@netronome.com>
Date: Fri, 6 Oct 2017 10:21:21 +0200
Subject: nfp: add IPv4 ttl and tos match offloading support
Patch-mainline: v4.15-rc1
Git-commit: a1e9203cc6e5247f6e7af897252ca92cdf5edb70
References: bsc#1109837

Previously matching on IPv4 ttl and tos fields were not offloaded. This
patch enables offloading IPv4 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>
Acked-by: Thomas Bogendoerfer <tbogendoerfer@suse.de>
---
 drivers/net/ethernet/netronome/nfp/flower/match.c   |   11 ++++++++++-
 drivers/net/ethernet/netronome/nfp/flower/offload.c |    4 ----
 2 files changed, 10 insertions(+), 5 deletions(-)

--- a/drivers/net/ethernet/netronome/nfp/flower/match.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/match.c
@@ -156,7 +156,6 @@ nfp_flower_compile_ipv4(struct nfp_flowe
 	struct flow_dissector_key_ipv4_addrs *addr;
 	struct flow_dissector_key_basic *basic;
 
-	/* Wildcard TOS/TTL for now. */
 	memset(frame, 0, sizeof(struct nfp_flower_ipv4));
 
 	if (dissector_uses_key(flow->dissector,
@@ -174,6 +173,16 @@ nfp_flower_compile_ipv4(struct nfp_flowe
 						  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
--- a/drivers/net/ethernet/netronome/nfp/flower/offload.c
+++ b/drivers/net/ethernet/netronome/nfp/flower/offload.c
@@ -216,10 +216,6 @@ nfp_flower_calculate_key_layers(struct n
 		/* Ethernet type is present in the key. */
 		switch (key_basic->n_proto) {
 		case cpu_to_be16(ETH_P_IP):
-			if (mask_ip && mask_ip->tos)
-				return -EOPNOTSUPP;
-			if (mask_ip && mask_ip->ttl)
-				return -EOPNOTSUPP;
 			key_layer |= NFP_FLOWER_LAYER_IPV4;
 			key_size += sizeof(struct nfp_flower_ipv4);
 			break;