diff --git a/include/net/bluetooth/hci.h b/include/net/bluetooth/hci.h
index e7f938cac7c6..cf75c4391945 100644
--- a/include/net/bluetooth/hci.h
+++ b/include/net/bluetooth/hci.h
@@ -262,6 +262,7 @@ enum {
 #define HCI_ACLDATA_PKT		0x02
 #define HCI_SCODATA_PKT		0x03
 #define HCI_EVENT_PKT		0x04
+#define HCI_DIAG_PKT		0xf0
 #define HCI_VENDOR_PKT		0xff
 
 /* HCI packet types */
diff --git a/include/net/bluetooth/hci_core.h b/include/net/bluetooth/hci_core.h
index 61dc786358be..d473b67a2c65 100644
--- a/include/net/bluetooth/hci_core.h
+++ b/include/net/bluetooth/hci_core.h
@@ -1066,6 +1066,7 @@ int hci_remove_adv_instance(struct hci_dev *hdev, u8 instance);
 void hci_event_packet(struct hci_dev *hdev, struct sk_buff *skb);
 
 int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb);
+int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb);
 
 void hci_init_sysfs(struct hci_dev *hdev);
 void hci_conn_init_sysfs(struct hci_conn *conn);
diff --git a/include/net/bluetooth/hci_mon.h b/include/net/bluetooth/hci_mon.h
index 842bb754a078..2b67567cf28d 100644
--- a/include/net/bluetooth/hci_mon.h
+++ b/include/net/bluetooth/hci_mon.h
@@ -42,6 +42,7 @@ struct hci_mon_hdr {
 #define HCI_MON_OPEN_INDEX	8
 #define HCI_MON_CLOSE_INDEX	9
 #define HCI_MON_INDEX_INFO	10
+#define HCI_MON_VENDOR_DIAG	11
 
 struct hci_mon_new_index {
 	__u8		type;
diff --git a/net/bluetooth/hci_core.c b/net/bluetooth/hci_core.c
index 40a67017bd32..8193845a9b60 100644
--- a/net/bluetooth/hci_core.c
+++ b/net/bluetooth/hci_core.c
@@ -3493,6 +3493,21 @@ int hci_recv_frame(struct hci_dev *hdev, struct sk_buff *skb)
 }
 EXPORT_SYMBOL(hci_recv_frame);
 
+/* Receive diagnostic message from HCI drivers */
+int hci_recv_diag(struct hci_dev *hdev, struct sk_buff *skb)
+{
+	/* Time stamp */
+	__net_timestamp(skb);
+
+	/* Mark as diagnostic packet and send to monitor */
+	bt_cb(skb)->pkt_type = HCI_DIAG_PKT;
+	hci_send_to_monitor(hdev, skb);
+
+	kfree_skb(skb);
+	return 0;
+}
+EXPORT_SYMBOL(hci_recv_diag);
+
 /* ---- Interface to upper protocols ---- */
 
 int hci_register_cb(struct hci_cb *cb)
diff --git a/net/bluetooth/hci_sock.c b/net/bluetooth/hci_sock.c
index 9bf30db89d89..9a100c1fd7b5 100644
--- a/net/bluetooth/hci_sock.c
+++ b/net/bluetooth/hci_sock.c
@@ -279,6 +279,9 @@ void hci_send_to_monitor(struct hci_dev *hdev, struct sk_buff *skb)
 		else
 			opcode = cpu_to_le16(HCI_MON_SCO_TX_PKT);
 		break;
+	case HCI_DIAG_PKT:
+		opcode = cpu_to_le16(HCI_MON_VENDOR_DIAG);
+		break;
 	default:
 		return;
 	}