diff --git a/include/uapi/linux/msm_ipa.h b/include/uapi/linux/msm_ipa.h
index 63f21763394a..b6ad02a7ea3c 100644
--- a/include/uapi/linux/msm_ipa.h
+++ b/include/uapi/linux/msm_ipa.h
@@ -219,6 +219,11 @@
 
 #define IPA_CV2X_SUPPORT
 
+/**
+ *  Max number of delegated IDUs for prefix delegation FR
+ */
+#define IPA_PREFIX_MAPPING_MAX 16
+
 /**
  * the attributes of the rule (routing or filtering)
  */
@@ -3423,14 +3428,20 @@ enum ipa_ext_router_mode {
  * struct ipa_ioc_ext_router_info - provide ext_router info
  * @ipa_ext_router_mode: prefix sharing, prefix delegation, or disabled mode
  * @pdn_name: PDN interface name
- * @ipv6_addr: the prefix addr used for dummy or delegated prefixes
+ * @ipv6_addr: the prefix addr used for the dummy prefix. (prefix sharing mode)
  * @ipv6_mask: the ipv6 mask used to mask above addr to get the correct prefix
+ * @num_of_del_prefix_mapping: number of delegated prefix to IDU IP mapping
+ * @idu_del_wan_ip: array of IDU WAN IP to be mapped to a delegated prefix
+ * @idu_del_client_prefix: Array of delegated prefixes
  */
 struct ipa_ioc_ext_router_info {
 	enum ipa_ext_router_mode mode;
 	char pdn_name[IPA_RESOURCE_NAME_MAX];
 	uint32_t ipv6_addr[4];
 	uint32_t ipv6_mask[4];
+	int num_of_idu_prefix_mapping;
+	uint32_t idu_wan_ip[IPA_PREFIX_MAPPING_MAX][4];
+	uint32_t idu_client_prefix[IPA_PREFIX_MAPPING_MAX][4];
 };
 
 /**