qcacmn: Add support to send packet marked by upper layer to FW

Upper layer (OS_IF) can mark certain packets to be sent
to FW. Mark such packets as exception, so that it is sent
to the FW.

Change-Id: I44af2b06793712be7236f831b6b2604123d72bb1
CRs-Fixed: 2813172

dp/wifi3.0/dp_tx.c

@@ -902,6 +902,29 @@ dp_tx_wds_ext(struct dp_soc *soc, struct dp_vdev *vdev, uint16_t peer_id,
 }
 #endif
 
+#ifdef WLAN_DP_FEATURE_MARK_ICMP_REQ_TO_FW
+/**
+ * dp_tx_is_nbuf_marked_exception() - Check if the packet has been marked as
+ *				      exception by the upper layer (OS_IF)
+ * @soc: DP soc handle
+ * @nbuf: packet to be transmitted
+ *
+ * Returns: 1 if the packet is marked as exception,
+ *	    0, if the packet is not marked as exception.
+ */
+static inline int dp_tx_is_nbuf_marked_exception(struct dp_soc *soc,
+						 qdf_nbuf_t nbuf)
+{
+	return QDF_NBUF_CB_TX_PACKET_TO_FW(nbuf);
+}
+#else
+static inline int dp_tx_is_nbuf_marked_exception(struct dp_soc *soc,
+						 qdf_nbuf_t nbuf)
+{
+	return 0;
+}
+#endif
+
 /**
  * dp_tx_desc_prepare_single - Allocate and prepare Tx descriptor
  * @vdev: DP vdev handle
@@ -961,6 +984,9 @@ struct dp_tx_desc_s *dp_tx_prepare_desc_single(struct dp_vdev *vdev,
 	if (qdf_unlikely(dp_is_tx_extended(vdev, tx_exc_metadata)))
 		return tx_desc;
 
+	/* Packets marked by upper layer (OS-IF) to be sent to FW */
+	if (dp_tx_is_nbuf_marked_exception(soc, nbuf))
+		is_exception = 1;
 	/*
 	 * For special modes (vdev_type == ocb or mesh), data frames should be
 	 * transmitted using varying transmit parameters (tx spec) which include