qcacmn: Add last TX/RX timestamp in DP peer stats

Add timestamps for last TX/RX in peer stats. This stat is needed to be
passed on to upper layers on demand.

CRs-Fixed: 3059712
Change-Id: If0d8b7dc3c139e4d1b670bf98f3f574f02ea9715

dp/inc/cdp_txrx_stats_struct.h

@@ -1,5 +1,6 @@
 /*
  * Copyright (c) 2016-2021 The Linux Foundation. All rights reserved.
+ * Copyright (c) 2021 Qualcomm Innovation Center, Inc. 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
@@ -1022,6 +1023,7 @@ struct protocol_trace_count {
  *       <enum 2     1_6_us_sgi > HE related GI
  *       <enum 3     3_2_us_sgi > HE
  * @preamble_info: preamble
+ * @last_tx_ts: last timestamp in jiffies when tx comp occurred
  */
 struct cdp_tx_stats {
 	struct cdp_pkt_info comp_pkt;
@@ -1122,6 +1124,7 @@ struct cdp_tx_stats {
 		 preamble_info:4;
 	/* mpdu retry count in case of successful transmission */
 	uint32_t mpdu_success_with_retries;
+	unsigned long last_tx_ts;
 };
 
 /* struct cdp_rx_stats - rx Level Stats
@@ -1133,6 +1136,7 @@ struct cdp_tx_stats {
  * @raw: Raw Pakets received
  * @nawds_mcast_drop: Total multicast packets
  * @mec_drop: Total MEC packets dropped
+ * @last_rx_ts: last timestamp in jiffies when RX happened
  * @pkts: Intra BSS packets received
  * @fail: Intra BSS packets failed
  * @mdns_no_fwd: Intra BSS MDNS packets not forwarded
@@ -1211,6 +1215,7 @@ struct cdp_rx_stats {
 	struct cdp_pkt_info raw;
 	uint32_t nawds_mcast_drop;
 	struct cdp_pkt_info mec_drop;
+	unsigned long last_rx_ts;
 	struct {
 		struct cdp_pkt_info pkts;
 		struct cdp_pkt_info fail;

dp/wifi3.0/dp_rx.c

@@ -1714,6 +1714,8 @@ void dp_rx_msdu_stats_update(struct dp_soc *soc, qdf_nbuf_t nbuf,
 	if (!soc->process_rx_status)
 		return;
 
+	peer->stats.rx.last_rx_ts = qdf_system_ticks();
+
 	/*
 	 * TODO - For WCN7850 this field is present in ring_desc
 	 * Try to use ring desc instead of tlv.

dp/wifi3.0/dp_tx.c

@@ -3755,6 +3755,7 @@ dp_tx_update_peer_stats(struct dp_tx_desc_s *tx_desc,
 		DP_STATS_INCC(peer, tx.mpdu_success_with_retries,
 			      qdf_do_div(ts->transmit_cnt, DP_RETRY_COUNT),
 			      ts->transmit_cnt > DP_RETRY_COUNT);
+	peer->stats.tx.last_tx_ts = qdf_system_ticks();
 }
 
 #ifdef QCA_LL_TX_FLOW_CONTROL_V2