qcacmn: Cache rx frames during dp peer register

Currently frames will be dropped if it arrives before
peer is registered with data path module by control path.
So cache rx frames and flush them to the upper layer when
peer is registered at data path.

Change-Id: I086122fffdcf33e25ba57774ef944550cdd2fa20
CRs-Fixed: 2329308

dp/wifi3.0/dp_rx.h

@@ -128,6 +128,16 @@ struct dp_rx_desc {
  */
 #define DP_SKIP_VLAN		8
 
+/**
+ * struct dp_rx_cached_buf - rx cached buffer
+ * @list: linked list node
+ * @buf: skb buffer
+ */
+struct dp_rx_cached_buf {
+	qdf_list_node_t node;
+	qdf_nbuf_t buf;
+};
+
 /*
  *dp_rx_xor_block() - xor block of data
  *@b: destination data block
@@ -1225,4 +1235,18 @@ void dp_rx_process_rxdma_err(struct dp_soc *soc, qdf_nbuf_t nbuf,
 			     uint8_t *rx_tlv_hdr, struct dp_peer *peer,
 			     uint8_t err_code);
 
+#ifdef PEER_CACHE_RX_PKTS
+/**
+ * dp_rx_flush_rx_cached() - flush cached rx frames
+ * @peer: peer
+ * @drop: set flag to drop frames
+ *
+ * Return: None
+ */
+void dp_rx_flush_rx_cached(struct dp_peer *peer, bool drop);
+#else
+static inline void dp_rx_flush_rx_cached(struct dp_peer *peer, bool drop)
+{
+}
+#endif
 #endif /* _DP_RX_H */