+static bool
+iavf_fdir_refine_input_set(const uint64_t input_set,
+ const uint64_t input_set_mask,
+ struct iavf_fdir_conf *filter)
+{
+ struct virtchnl_proto_hdr *hdr, *hdr_last;
+ struct rte_flow_item_ipv4 ipv4_spec;
+ struct rte_flow_item_ipv6 ipv6_spec;
+ int last_layer;
+ uint8_t proto_id;
+
+ if (input_set & ~input_set_mask)
+ return false;
+ else if (input_set)
+ return true;
+
+ last_layer = filter->add_fltr.rule_cfg.proto_hdrs.count - 1;
+ /* Last layer of TCP/UDP pattern isn't less than 2. */
+ if (last_layer < 2)
+ return false;
+ hdr_last = &filter->add_fltr.rule_cfg.proto_hdrs.proto_hdr[last_layer];
+ if (hdr_last->type == VIRTCHNL_PROTO_HDR_TCP)
+ proto_id = 6;
+ else if (hdr_last->type == VIRTCHNL_PROTO_HDR_UDP)
+ proto_id = 17;
+ else
+ return false;
+
+ hdr = &filter->add_fltr.rule_cfg.proto_hdrs.proto_hdr[last_layer - 1];
+ switch (hdr->type) {
+ case VIRTCHNL_PROTO_HDR_IPV4:
+ VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV4, PROT);
+ memset(&ipv4_spec, 0, sizeof(ipv4_spec));
+ ipv4_spec.hdr.next_proto_id = proto_id;
+ rte_memcpy(hdr->buffer, &ipv4_spec.hdr,
+ sizeof(ipv4_spec.hdr));
+ return true;
+ case VIRTCHNL_PROTO_HDR_IPV6:
+ VIRTCHNL_ADD_PROTO_HDR_FIELD_BIT(hdr, IPV6, PROT);
+ memset(&ipv6_spec, 0, sizeof(ipv6_spec));
+ ipv6_spec.hdr.proto = proto_id;
+ rte_memcpy(hdr->buffer, &ipv6_spec.hdr,
+ sizeof(ipv6_spec.hdr));
+ return true;
+ default:
+ return false;
+ }
+}
+