+/**
+ * Convert modify-header set IPv4 DSCP action to DV specification.
+ *
+ * @param[in,out] resource
+ * Pointer to the modify-header resource.
+ * @param[in] action
+ * Pointer to action specification.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_convert_action_modify_ipv4_dscp
+ (struct mlx5_flow_dv_modify_hdr_resource *resource,
+ const struct rte_flow_action *action,
+ struct rte_flow_error *error)
+{
+ const struct rte_flow_action_set_dscp *conf =
+ (const struct rte_flow_action_set_dscp *)(action->conf);
+ struct rte_flow_item item = { .type = RTE_FLOW_ITEM_TYPE_IPV4 };
+ struct rte_flow_item_ipv4 ipv4;
+ struct rte_flow_item_ipv4 ipv4_mask;
+
+ memset(&ipv4, 0, sizeof(ipv4));
+ memset(&ipv4_mask, 0, sizeof(ipv4_mask));
+ ipv4.hdr.type_of_service = conf->dscp;
+ ipv4_mask.hdr.type_of_service = RTE_IPV4_HDR_DSCP_MASK >> 2;
+ item.spec = &ipv4;
+ item.mask = &ipv4_mask;
+ return flow_dv_convert_modify_action(&item, modify_ipv4, NULL, resource,
+ MLX5_MODIFICATION_TYPE_SET, error);
+}
+
+/**
+ * Convert modify-header set IPv6 DSCP action to DV specification.
+ *
+ * @param[in,out] resource
+ * Pointer to the modify-header resource.
+ * @param[in] action
+ * Pointer to action specification.
+ * @param[out] error
+ * Pointer to the error structure.
+ *
+ * @return
+ * 0 on success, a negative errno value otherwise and rte_errno is set.
+ */
+static int
+flow_dv_convert_action_modify_ipv6_dscp
+ (struct mlx5_flow_dv_modify_hdr_resource *resource,
+ const struct rte_flow_action *action,
+ struct rte_flow_error *error)
+{
+ const struct rte_flow_action_set_dscp *conf =
+ (const struct rte_flow_action_set_dscp *)(action->conf);
+ struct rte_flow_item item = { .type = RTE_FLOW_ITEM_TYPE_IPV6 };
+ struct rte_flow_item_ipv6 ipv6;
+ struct rte_flow_item_ipv6 ipv6_mask;
+
+ memset(&ipv6, 0, sizeof(ipv6));
+ memset(&ipv6_mask, 0, sizeof(ipv6_mask));
+ /*
+ * Even though the DSCP bits offset of IPv6 is not byte aligned,
+ * rdma-core only accept the DSCP bits byte aligned start from
+ * bit 0 to 5 as to be compatible with IPv4. No need to shift the
+ * bits in IPv6 case as rdma-core requires byte aligned value.
+ */
+ ipv6.hdr.vtc_flow = conf->dscp;
+ ipv6_mask.hdr.vtc_flow = RTE_IPV6_HDR_DSCP_MASK >> 22;
+ item.spec = &ipv6;
+ item.mask = &ipv6_mask;
+ return flow_dv_convert_modify_action(&item, modify_ipv6, NULL, resource,
+ MLX5_MODIFICATION_TYPE_SET, error);
+}
+