netdev - [PATCH net-next 3/5] qede: Add support to handle GENEVE hardware GRO packets

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Date:	Wed, 22 Jun 2016 04:25:24 -0400
From:	Manish Chopra <manish.chopra@...gic.com>
To:	<davem@...emloft.net>
CC:	<netdev@...r.kernel.org>, <Ariel.Elior@...gic.com>,
	<Yuval.Mintz@...gic.com>
Subject: [PATCH net-next 3/5] qede: Add support to handle GENEVE hardware GRO packets

This patch adds support to do necessary processing
for hardware assisted GENEVE tunnel GRO packets before
driver delivers them upto the stack.

Signed-off-by: Manish Chopra <manish.chopra@...gic.com>
Signed-off-by: Yuval Mintz <Yuval.Mintz@...gic.com>
---
 drivers/net/ethernet/qlogic/qede/qede_main.c | 30 ++++++++++++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/drivers/net/ethernet/qlogic/qede/qede_main.c b/drivers/net/ethernet/qlogic/qede/qede_main.c
index f94ea16..a4b445f 100644
--- a/drivers/net/ethernet/qlogic/qede/qede_main.c
+++ b/drivers/net/ethernet/qlogic/qede/qede_main.c
@@ -37,6 +37,7 @@
 #include <net/ip6_checksum.h>
 #include <linux/bitops.h>
 #include <net/vxlan.h>
+#include <net/geneve.h>
 
 #include "qede.h"
 
@@ -1205,6 +1206,32 @@ static void qede_handle_vxlan_tunnel_gro(struct sk_buff *skb)
 	}
 }
 
+static inline struct genevehdr *
+qede_geneve_hdr(struct sk_buff *skb, int off) {
+	return (struct genevehdr *)(skb->data + off + sizeof(struct udphdr));
+}
+
+static void qede_handle_geneve_tunnel_gro(struct sk_buff *skb)
+{
+	struct genevehdr *gh;
+
+	switch (skb->protocol) {
+	case htons(ETH_P_IP):
+		gh = qede_geneve_hdr(skb, sizeof(struct iphdr));
+		qede_set_nh_th_offset(skb, VXLAN_HEADROOM + (gh->opt_len * 4));
+		udp4_gro_complete(skb, sizeof(struct iphdr));
+		break;
+	case htons(ETH_P_IPV6):
+		gh = qede_geneve_hdr(skb, sizeof(struct ipv6hdr));
+		qede_set_nh_th_offset(skb, VXLAN6_HEADROOM + (gh->opt_len * 4));
+		udp6_gro_complete(skb, sizeof(struct ipv6hdr));
+		break;
+	default:
+		WARN_ONCE(1, "Unsupported GENEVE tunnel GRO proto=0x%x\n",
+			  skb->protocol);
+	}
+}
+
 static void qede_handle_tunnel_gro(struct qede_dev *edev,
 				   struct sk_buff *skb, u8 tunnel_type)
 {
@@ -1212,6 +1239,9 @@ static void qede_handle_tunnel_gro(struct qede_dev *edev,
 	case ETH_RX_TUNN_VXLAN:
 		qede_handle_vxlan_tunnel_gro(skb);
 		break;
+	case ETH_RX_TUNN_GENEVE:
+		qede_handle_geneve_tunnel_gro(skb);
+		break;
 	default:
 		WARN_ONCE(1, "Unsupported tunnel GRO, tunnel type=0x%x\n",
 			  tunnel_type);
-- 
2.7.2