[dpdk-dev] [PATCH v4 2/3] mbuf:add three TX ol_flags and repalce PKT_TX_VXLAN_CKSUM

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

Replace PKT_TX_VXLAN_CKSUM with PKT_TX_UDP_TUNNEL_PKT in order to indicate a packet is an UDP tunneling packet, and introduce 3 TX offload flags for outer IP TX checksum, which are PKT_TX_OUTER_IP_CKSUM, PKT_TX_OUTER_IPV4 and PKT_TX_OUTER_IPV6 respectively;Rework csum forward engine and i40e PMD due to these changes.

Signed-off-by: Jijiang Liu <jijiang.liu@intel.com>
---
 app/test-pmd/csumonly.c         |    9 +++++++--
 lib/librte_mbuf/rte_mbuf.c      |    7 ++++++-
 lib/librte_mbuf/rte_mbuf.h      |   11 ++++++++++-
 lib/librte_pmd_i40e/i40e_rxtx.c |    6 +++---
 4 files changed, 26 insertions(+), 7 deletions(-)

diff --git a/app/test-pmd/csumonly.c b/app/test-pmd/csumonly.c
index d8c080a..9094967 100644
--- a/app/test-pmd/csumonly.c
+++ b/app/test-pmd/csumonly.c
@@ -257,7 +257,7 @@ process_outer_cksums(void *outer_l3_hdr, uint16_t outer_ethertype,
 	uint64_t ol_flags = 0;
 
 	if (testpmd_ol_flags & TESTPMD_TX_OFFLOAD_VXLAN_CKSUM)
-		ol_flags |= PKT_TX_VXLAN_CKSUM;
+		ol_flags |= PKT_TX_UDP_TUNNEL_PKT;
 
 	if (outer_ethertype == _htons(ETHER_TYPE_IPv4)) {
 		ipv4_hdr->hdr_checksum = 0;
@@ -470,7 +470,12 @@ pkt_burst_checksum_forward(struct fwd_stream *fs)
 				{ PKT_TX_UDP_CKSUM, PKT_TX_L4_MASK },
 				{ PKT_TX_TCP_CKSUM, PKT_TX_L4_MASK },
 				{ PKT_TX_SCTP_CKSUM, PKT_TX_L4_MASK },
-				{ PKT_TX_VXLAN_CKSUM, PKT_TX_VXLAN_CKSUM },
+				{ PKT_TX_UDP_TUNNEL_PKT, PKT_TX_UDP_TUNNEL_PKT },
+				{ PKT_TX_IPV4, PKT_TX_IPV4 },
+				{ PKT_TX_IPV6, PKT_TX_IPV6 },
+				{ PKT_TX_OUTER_IP_CKSUM, PKT_TX_OUTER_IP_CKSUM },
+				{ PKT_TX_OUTER_IPV4, PKT_TX_OUTER_IPV4 },
+				{ PKT_TX_OUTER_IPV6, PKT_TX_OUTER_IPV6 },
 				{ PKT_TX_TCP_SEG, PKT_TX_TCP_SEG },
 			};
 			unsigned j;
diff --git a/lib/librte_mbuf/rte_mbuf.c b/lib/librte_mbuf/rte_mbuf.c
index 87c2963..1b14e02 100644
--- a/lib/librte_mbuf/rte_mbuf.c
+++ b/lib/librte_mbuf/rte_mbuf.c
@@ -240,8 +240,13 @@ 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";
+	case PKT_TX_IPV4: return "PKT_TX_IPV4";
+	case PKT_TX_IPV6: return "PKT_TX_IPV6";
+	case PKT_TX_OUTER_IP_CKSUM: return "PKT_TX_OUTER_IP_CKSUM";
+	case PKT_TX_OUTER_IPV4: return "PKT_TX_OUTER_IPV4";
+	case PKT_TX_OUTER_IPV6: return "PKT_TX_OUTER_IPV6";
 	default: return NULL;
 	}
 }
diff --git a/lib/librte_mbuf/rte_mbuf.h b/lib/librte_mbuf/rte_mbuf.h
index cbadf8e..6eb898f 100644
--- a/lib/librte_mbuf/rte_mbuf.h
+++ b/lib/librte_mbuf/rte_mbuf.h
@@ -118,7 +118,7 @@ extern "C" {
  */
 #define PKT_TX_TCP_SEG       (1ULL << 49)
 
-#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. */
 
 /**
@@ -149,6 +149,15 @@ extern "C" {
 
 #define PKT_TX_VLAN_PKT      (1ULL << 57) /**< TX packet is a 802.1q VLAN packet. */
 
+/** Outer IP checksum of TX packet, computed by NIC for tunneling packet */
+#define PKT_TX_OUTER_IP_CKSUM   (1ULL << 58)
+
+/** Packet is outer IPv4 without requiring IP checksum offload for tunneling packet. */
+#define PKT_TX_OUTER_IPV4   (1ULL << 59)
+
+/** Tell the NIC it's an outer IPv6 packet for tunneling packet */
+#define PKT_TX_OUTER_IPV6    (1ULL << 60)
+
 /* Use final bit of flags to indicate a control mbuf */
 #define CTRL_MBUF_FLAG       (1ULL << 63) /**< Mbuf contains control data */
 
diff --git a/lib/librte_pmd_i40e/i40e_rxtx.c b/lib/librte_pmd_i40e/i40e_rxtx.c
index 2d2ef04..078e973 100644
--- a/lib/librte_pmd_i40e/i40e_rxtx.c
+++ b/lib/librte_pmd_i40e/i40e_rxtx.c
@@ -478,7 +478,7 @@ i40e_txd_enable_checksum(uint64_t ol_flags,
 	}
 
 	/* VXLAN packet TX checksum offload */
-	if (unlikely(ol_flags & PKT_TX_VXLAN_CKSUM)) {
+	if (unlikely(ol_flags & PKT_TX_UDP_TUNNEL_PKT)) {
 		uint8_t l4tun_len;
 
 		l4tun_len = ETHER_VXLAN_HLEN + inner_l2_len;
@@ -1158,8 +1158,8 @@ i40e_calc_context_desc(uint64_t flags)
 {
 	uint64_t mask = 0ULL;
 
-	if (flags | PKT_TX_VXLAN_CKSUM)
-		mask |= PKT_TX_VXLAN_CKSUM;
+	if (flags | PKT_TX_UDP_TUNNEL_PKT)
+		mask |= PKT_TX_UDP_TUNNEL_PKT;
 
 #ifdef RTE_LIBRTE_IEEE1588
 	mask |= PKT_TX_IEEE1588_TMST;
-- 
1.7.7.6