qcacld-3.0: add TX packet threshold for DP SWLM

Add TX packet threshold while considering for TX write
coalescing. This helps improve low throughput TCP DL &
UL cases.

Change-Id: I9503a0b28a58dcaddbb08f3a98479bb31cd95285
CRs-Fixed: 2931051

core/dp/txrx3.0/dp_swlm.c

@@ -37,23 +37,30 @@ static bool dp_swlm_is_tput_thresh_reached(struct dp_soc *soc)
 {
 	struct dp_swlm *swlm = &soc->swlm;
 	static int prev_rx_bytes, prev_tx_bytes;
-	int rx_delta, tx_delta;
+	int rx_delta, tx_delta, tx_packet_delta;
+	static int prev_tx_packets;
+	bool result = false;
 
 	tx_delta = soc->stats.tx.egress.bytes - prev_tx_bytes;
 	prev_tx_bytes = soc->stats.tx.egress.bytes;
 	if (tx_delta > swlm->params.tcl.tx_traffic_thresh) {
 		swlm->params.tcl.sampling_session_tx_bytes = tx_delta;
-		return true;
+		result = true;
 	}
 
 	rx_delta = soc->stats.rx.ingress.bytes - prev_rx_bytes;
 	prev_rx_bytes = soc->stats.rx.ingress.bytes;
-	if (rx_delta > swlm->params.tcl.rx_traffic_thresh) {
+	if (!result && rx_delta > swlm->params.tcl.rx_traffic_thresh) {
 		swlm->params.tcl.sampling_session_tx_bytes = tx_delta;
-		return true;
+		result = true;
 	}
 
-	return false;
+	tx_packet_delta = soc->stats.tx.egress.num - prev_tx_packets;
+	prev_tx_packets = soc->stats.tx.egress.num;
+	if (tx_packet_delta < swlm->params.tcl.tx_pkt_thresh)
+		result = false;
+
+	return result;
 }
 
 /**
@@ -200,6 +207,7 @@ static inline QDF_STATUS dp_soc_swlm_tcl_attach(struct dp_soc *soc)
 	swlm->params.tcl.time_flush_thresh = DP_SWLM_TCL_TIME_FLUSH_THRESH;
 	swlm->params.tcl.tx_thresh_multiplier =
 					DP_SWLM_TCL_TX_THRESH_MULTIPLIER;
+	swlm->params.tcl.tx_pkt_thresh = DP_SWLM_TCL_TX_PKT_THRESH;
 
 	qdf_timer_init(soc->osdev, &swlm->params.tcl.flush_timer,
 		       dp_swlm_tcl_flush_timer, (void *)soc,

core/dp/txrx3.0/dp_swlm.h

@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2020, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2020-2021, The Linux Foundation. All rights reserved.
  *
  * Permission to use, copy, modify, and/or distribute this software for any
  * purpose with or without fee is hereby granted, provided that the above
@@ -21,8 +21,10 @@
 
 #define DP_SWLM_TCL_TPUT_PASS_THRESH 3
 
-#define DP_SWLM_TCL_RX_TRAFFIC_THRESH 50
-#define DP_SWLM_TCL_TX_TRAFFIC_THRESH 50
+#define DP_SWLM_TCL_RX_TRAFFIC_THRESH	50
+#define DP_SWLM_TCL_TX_TRAFFIC_THRESH	50
+#define DP_SWLM_TCL_TX_PKT_THRESH	2
+
 /* Traffic test time is in us */
 #define DP_SWLM_TCL_TRAFFIC_SAMPLING_TIME 250
 #define DP_SWLM_TCL_TIME_FLUSH_THRESH 1000