[dpdk-dev] [PATCH 1/3] mbuf:add two TX offload flags and change three fields

[Jijiang Liu <jijiang.liu@intel.com>]

In place of removing the PKT_TX_VXLAN_CKSUM, we introduce 2 new flags: PKT_TX_OUT_IP_CKSUM, PKT_TX_UDP_TUNNEL_PKT, and a new field: l4_tun_len.
Replace the inner_l2_len and the inner_l3_len field with the outer_l2_len and outer_l3_len field.

PKT_TX_OUT_IP_CKSUM: is not used for non-tunnelling packet;hardware outer checksum for tunnelling packet.
PKT_TX_UDP_TUNNEL_PKT: is used to tell PMD that the transmit packet is a UDP tunneling packet.
l4_tun_len: for VXLAN packet, it should be udp header length plus VXLAN header length. 

Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
---
 lib/librte_mbuf/rte_mbuf.c |    2 +-
 lib/librte_mbuf/rte_mbuf.h |   23 ++++++++++++++---------
 2 files changed, 15 insertions(+), 10 deletions(-)

diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 87c2963..e89c310 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -240,7 +240,7 @@ const char *rte_get_tx_ol_flag_name(uint64_t mask)
 	case PKT_TX_SCTP_CKSUM: return "PKT_TX_SCTP_CKSUM";
 	case PKT_TX_UDP_CKSUM: return "PKT_TX_UDP_CKSUM";
 	case PKT_TX_IEEE1588_TMST: return "PKT_TX_IEEE1588_TMST";
-	case PKT_TX_VXLAN_CKSUM: return "PKT_TX_VXLAN_CKSUM";
+	case PKT_TX_UDP_TUNNEL_PKT: return "PKT_TX_UDP_TUNNEL_PKT";
 	case PKT_TX_TCP_SEG: return "PKT_TX_TCP_SEG";
 	default: return NULL;
 	}
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index 367fc56..48cd8e1 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -99,10 +99,9 @@ extern "C" {
 #define PKT_RX_TUNNEL_IPV6_HDR (1ULL << 12) /**< RX tunnel packet with IPv6 header. */
 #define PKT_RX_FDIR_ID       (1ULL << 13) /**< FD id reported if FDIR match. */
 #define PKT_RX_FDIR_FLX      (1ULL << 14) /**< Flexible bytes reported if FDIR match. */
-/* add new RX flags here */
 
 /* add new TX flags here */
-#define PKT_TX_VXLAN_CKSUM   (1ULL << 50) /**< TX checksum of VXLAN computed by NIC */
+#define PKT_TX_UDP_TUNNEL_PKT (1ULL << 50) /**< TX packet is an UDP tunneling packet */
 #define PKT_TX_IEEE1588_TMST (1ULL << 51) /**< TX IEEE1588 packet to timestamp. */
 
 /**
@@ -125,13 +124,20 @@ extern "C" {
 #define PKT_TX_IP_CKSUM      (1ULL << 54) /**< IP cksum of TX pkt. computed by NIC. */
 #define PKT_TX_IPV4_CSUM     PKT_TX_IP_CKSUM /**< Alias of PKT_TX_IP_CKSUM. */
 
+#define PKT_TX_VLAN_PKT      (1ULL << 55) /**< TX packet is a 802.1q VLAN packet. */
+
 /** Tell the NIC it's an IPv4 packet. Required for L4 checksum offload or TSO. */
-#define PKT_TX_IPV4          PKT_RX_IPV4_HDR
+#define PKT_TX_IPV4          (1ULL << 56)
 
 /** Tell the NIC it's an IPv6 packet. Required for L4 checksum offload or TSO. */
-#define PKT_TX_IPV6          PKT_RX_IPV6_HDR
+#define PKT_TX_IPV6          (1ULL << 57)
 
-#define PKT_TX_VLAN_PKT      (1ULL << 55) /**< TX packet is a 802.1q VLAN packet. */
+/** Outer IP cksum of TX pkt. computed by NIC for tunneling packet */
+#define PKT_TX_OUTER_IP_CKSUM   (1ULL << 58)
+#define PKT_TX_OUTER_IPV4_CSUM  PKT_TX_OUTER_IP_CKSUM /**< Alias of PKT_TX_OUTER_IP_CKSUM. */
+
+/** Tell the NIC it's an outer IPv6 packet for tunneling packet.*/
+#define PKT_TX_OUTER_IPV6    (1ULL << 59)
 
 /**
  * TCP segmentation offload. To enable this offload feature for a
@@ -266,10 +272,9 @@ struct rte_mbuf {
 			uint64_t tso_segsz:16; /**< TCP TSO segment size */
 
 			/* fields for TX offloading of tunnels */
-			uint64_t inner_l3_len:9; /**< inner L3 (IP) Hdr Length. */
-			uint64_t inner_l2_len:7; /**< inner L2 (MAC) Hdr Length. */
-
-			/* uint64_t unused:8; */
+			uint64_t outer_l3_len:9; /**< outer L3 (IP) Hdr Length. */
+			uint64_t outer_l2_len:7; /**< outer L2 (MAC) Hdr Length. */
+			uint64_t l4_tun_len:8; /**< L4 tunnelling header length */
 		};
 	};
 } __rte_cache_aligned;
-- 
1.7.7.6