+static bool
+hns3_outer_ipv4_cksum_prepared(struct rte_mbuf *m, uint64_t ol_flags,
+ uint32_t *l4_proto)
+{
+ struct rte_ipv4_hdr *ipv4_hdr;
+ ipv4_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv4_hdr *,
+ m->outer_l2_len);
+ if (ol_flags & PKT_TX_OUTER_IP_CKSUM)
+ ipv4_hdr->hdr_checksum = 0;
+ if (ol_flags & PKT_TX_OUTER_UDP_CKSUM) {
+ struct rte_udp_hdr *udp_hdr;
+ /*
+ * If OUTER_UDP_CKSUM is support, HW can caclulate the pseudo
+ * header for TSO packets
+ */
+ if (ol_flags & PKT_TX_TCP_SEG)
+ return true;
+ udp_hdr = rte_pktmbuf_mtod_offset(m, struct rte_udp_hdr *,
+ m->outer_l2_len + m->outer_l3_len);
+ udp_hdr->dgram_cksum = rte_ipv4_phdr_cksum(ipv4_hdr, ol_flags);
+
+ return true;
+ }
+ *l4_proto = ipv4_hdr->next_proto_id;
+ return false;
+}
+
+static bool
+hns3_outer_ipv6_cksum_prepared(struct rte_mbuf *m, uint64_t ol_flags,
+ uint32_t *l4_proto)
+{
+ struct rte_ipv6_hdr *ipv6_hdr;
+ ipv6_hdr = rte_pktmbuf_mtod_offset(m, struct rte_ipv6_hdr *,
+ m->outer_l2_len);
+ if (ol_flags & PKT_TX_OUTER_UDP_CKSUM) {
+ struct rte_udp_hdr *udp_hdr;
+ /*
+ * If OUTER_UDP_CKSUM is support, HW can caclulate the pseudo
+ * header for TSO packets
+ */
+ if (ol_flags & PKT_TX_TCP_SEG)
+ return true;
+ udp_hdr = rte_pktmbuf_mtod_offset(m, struct rte_udp_hdr *,
+ m->outer_l2_len + m->outer_l3_len);
+ udp_hdr->dgram_cksum = rte_ipv6_phdr_cksum(ipv6_hdr, ol_flags);
+
+ return true;
+ }
+ *l4_proto = ipv6_hdr->proto;
+ return false;
+}
+