+ return result;
+}
+
+/******************************************************************************
+ * If user knows a specific offload is not enabled by APP,
+ * the macro can be commented to save the effort of fast path.
+ * Currently below 2 features are supported in TX path,
+ * 1, checksum offload
+ * 2, VLAN/QINQ insertion
+ ******************************************************************************/
+#define IAVF_TX_CSUM_OFFLOAD
+#define IAVF_TX_VLAN_QINQ_OFFLOAD
+
+static __rte_always_inline void
+iavf_txd_enable_offload(__rte_unused struct rte_mbuf *tx_pkt,
+ uint64_t *txd_hi)
+{
+#if defined(IAVF_TX_CSUM_OFFLOAD) || defined(IAVF_TX_VLAN_QINQ_OFFLOAD)
+ uint64_t ol_flags = tx_pkt->ol_flags;
+#endif
+ uint32_t td_cmd = 0;
+#ifdef IAVF_TX_CSUM_OFFLOAD
+ uint32_t td_offset = 0;
+#endif
+
+#ifdef IAVF_TX_CSUM_OFFLOAD
+ /* Set MACLEN */
+ td_offset |= (tx_pkt->l2_len >> 1) <<
+ IAVF_TX_DESC_LENGTH_MACLEN_SHIFT;
+
+ /* Enable L3 checksum offloads */
+ if (ol_flags & PKT_TX_IP_CKSUM) {
+ td_cmd |= IAVF_TX_DESC_CMD_IIPT_IPV4_CSUM;
+ td_offset |= (tx_pkt->l3_len >> 2) <<
+ IAVF_TX_DESC_LENGTH_IPLEN_SHIFT;
+ } else if (ol_flags & PKT_TX_IPV4) {
+ td_cmd |= IAVF_TX_DESC_CMD_IIPT_IPV4;
+ td_offset |= (tx_pkt->l3_len >> 2) <<
+ IAVF_TX_DESC_LENGTH_IPLEN_SHIFT;
+ } else if (ol_flags & PKT_TX_IPV6) {
+ td_cmd |= IAVF_TX_DESC_CMD_IIPT_IPV6;
+ td_offset |= (tx_pkt->l3_len >> 2) <<
+ IAVF_TX_DESC_LENGTH_IPLEN_SHIFT;
+ }
+
+ /* Enable L4 checksum offloads */
+ switch (ol_flags & PKT_TX_L4_MASK) {
+ case PKT_TX_TCP_CKSUM:
+ td_cmd |= IAVF_TX_DESC_CMD_L4T_EOFT_TCP;
+ td_offset |= (sizeof(struct rte_tcp_hdr) >> 2) <<
+ IAVF_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
+ break;
+ case PKT_TX_SCTP_CKSUM:
+ td_cmd |= IAVF_TX_DESC_CMD_L4T_EOFT_SCTP;
+ td_offset |= (sizeof(struct rte_sctp_hdr) >> 2) <<
+ IAVF_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
+ break;
+ case PKT_TX_UDP_CKSUM:
+ td_cmd |= IAVF_TX_DESC_CMD_L4T_EOFT_UDP;
+ td_offset |= (sizeof(struct rte_udp_hdr) >> 2) <<
+ IAVF_TX_DESC_LENGTH_L4_FC_LEN_SHIFT;
+ break;
+ default:
+ break;
+ }
+
+ *txd_hi |= ((uint64_t)td_offset) << IAVF_TXD_QW1_OFFSET_SHIFT;
+#endif
+
+#ifdef IAVF_TX_VLAN_QINQ_OFFLOAD
+ if (ol_flags & (PKT_TX_VLAN | PKT_TX_QINQ)) {
+ td_cmd |= IAVF_TX_DESC_CMD_IL2TAG1;
+ *txd_hi |= ((uint64_t)tx_pkt->vlan_tci <<
+ IAVF_TXD_QW1_L2TAG1_SHIFT);
+ }
+#endif
+
+ *txd_hi |= ((uint64_t)td_cmd) << IAVF_TXD_QW1_CMD_SHIFT;