[dpdk-dev] [PATCH v2 34/36] net/ice/base: add check to ipv4 next protocol

[Qi Zhang]

In order to support switch rule for NVGRE packets,
it need to check ipv4 next protocol number, if it is 0x2F,
which means next payload is NVGRE, we need to use NVGRE
format dummy packet.

Signed-off-by: Wei Zhao <wei.zhao1 at intel.com>
Signed-off-by: Qi Zhang <qi.z.zhang at intel.com>
Signed-off-by: Paul M Stillwell Jr <paul.m.stillwell.jr at intel.com>
---
 drivers/net/ice/base/ice_switch.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/net/ice/base/ice_switch.c b/drivers/net/ice/base/ice_switch.c
index 29fa9cf7e..a7fb30b05 100644
--- a/drivers/net/ice/base/ice_switch.c
+++ b/drivers/net/ice/base/ice_switch.c
@@ -10,6 +10,7 @@
 #define ICE_ETH_ETHTYPE_OFFSET		12
 #define ICE_ETH_VLAN_TCI_OFFSET		14
 #define ICE_MAX_VLAN_ID			0xFFF
+#define ICE_IPV4_NVGRE_PROTO_ID		0x002F
 
 /* Dummy ethernet header needed in the ice_aqc_sw_rules_elem
  * struct to configure any switch filter rules.
@@ -5908,6 +5909,7 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
 		      const struct ice_dummy_pkt_offsets **offsets)
 {
 	bool tcp = false, udp = false, ipv6 = false, vlan = false;
+	bool gre = false;
 	u16 i;
 
 	if (tun_type == ICE_SW_TUN_GTP) {
@@ -5931,6 +5933,12 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
 			ipv6 = true;
 		else if (lkups[i].type == ICE_VLAN_OFOS)
 			vlan = true;
+		else if (lkups[i].type == ICE_IPV4_OFOS &&
+			 lkups[i].h_u.ipv4_hdr.protocol ==
+				ICE_IPV4_NVGRE_PROTO_ID &&
+			 lkups[i].m_u.ipv4_hdr.protocol ==
+				0xFF)
+			gre = true;
 	}
 
 	if (tun_type == ICE_ALL_TUNNELS) {
@@ -5940,7 +5948,7 @@ ice_find_dummy_packet(struct ice_adv_lkup_elem *lkups, u16 lkups_cnt,
 		return;
 	}
 
-	if (tun_type == ICE_SW_TUN_NVGRE) {
+	if (tun_type == ICE_SW_TUN_NVGRE || gre) {
 		if (tcp) {
 			*pkt = dummy_gre_tcp_packet;
 			*pkt_len = sizeof(dummy_gre_tcp_packet);
-- 
2.13.6