+
+static inline void
+i40e_parse_tunneling_params(uint64_t ol_flags,
+ union i40e_tx_offload tx_offload,
+ uint32_t *cd_tunneling)
+{
+ /* EIPT: External (outer) IP header type */
+ if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
+ *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4;
+ else if (ol_flags & PKT_TX_OUTER_IPV4)
+ *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV4_NO_CSUM;
+ else if (ol_flags & PKT_TX_OUTER_IPV6)
+ *cd_tunneling |= I40E_TX_CTX_EXT_IP_IPV6;
+
+ /* EIPLEN: External (outer) IP header length, in DWords */
+ *cd_tunneling |= (tx_offload.outer_l3_len >> 2) <<
+ I40E_TXD_CTX_QW0_EXT_IPLEN_SHIFT;
+
+ /* L4TUNT: L4 Tunneling Type */
+ switch (ol_flags & PKT_TX_TUNNEL_MASK) {
+ case PKT_TX_TUNNEL_IPIP:
+ /* for non UDP / GRE tunneling, set to 00b */
+ break;
+ case PKT_TX_TUNNEL_VXLAN:
+ case PKT_TX_TUNNEL_GENEVE:
+ *cd_tunneling |= I40E_TXD_CTX_UDP_TUNNELING;
+ break;
+ case PKT_TX_TUNNEL_GRE:
+ *cd_tunneling |= I40E_TXD_CTX_GRE_TUNNELING;
+ break;
+ default:
+ PMD_TX_LOG(ERR, "Tunnel type not supported\n");
+ return;
+ }
+
+ /* L4TUNLEN: L4 Tunneling Length, in Words
+ *
+ * We depend on app to set rte_mbuf.l2_len correctly.
+ * For IP in GRE it should be set to the length of the GRE
+ * header;
+ * for MAC in GRE or MAC in UDP it should be set to the length
+ * of the GRE or UDP headers plus the inner MAC up to including
+ * its last Ethertype.
+ */
+ *cd_tunneling |= (tx_offload.l2_len >> 1) <<
+ I40E_TXD_CTX_QW0_NATLEN_SHIFT;
+}
+