qcacld-3.0: use more accurate tx/rx packets statistics

Sometimes TX/RX pkt statistics workqueue may be delayed.
The workqueue interval value is pre-defined and is used
for bandwidth vote. If the interval is inaccurate, whole
pkts statistics are not accurate, bus bandwidth vote is
wrong also. This change is aimed to use absolute workqueue
time delay instead of pre-defined value to get accurate
packets per milliseconds result.

Change-Id: I2b730fc36d4b5c42742ed9107d9a7e1f95eb4988
CRs-Fixed: 2976857

core/hdd/inc/wlan_hdd_main.h

@@ -2209,6 +2209,7 @@ struct hdd_context {
 #endif
 	bool is_wifi3_0_target;
 	bool dump_in_progress;
+	qdf_time_t bw_vote_time;
 };
 
 /**

core/hdd/src/wlan_hdd_main.c

@@ -10087,6 +10087,9 @@ static void __hdd_bus_bw_work_handler(struct hdd_context *hdd_ctx)
 	uint32_t ipa_tx_packets = 0, ipa_rx_packets = 0;
 	uint64_t sta_tx_bytes = 0, sap_tx_bytes = 0;
 	wlan_net_dev_ref_dbgid dbgid = NET_DEV_HOLD_BUS_BW_WORK_HANDLER;
+	uint64_t diff_us;
+	uint64_t curr_time_us;
+	uint32_t bw_interval_us;
 
 	if (wlan_hdd_validate_context(hdd_ctx))
 		goto stop_work;
@@ -10094,6 +10097,13 @@ static void __hdd_bus_bw_work_handler(struct hdd_context *hdd_ctx)
 	if (hdd_ctx->is_wiphy_suspended)
 		return;
 
+	bw_interval_us = hdd_ctx->config->bus_bw_compute_interval * 1000;
+
+	curr_time_us = qdf_get_log_timestamp();
+	diff_us = qdf_log_timestamp_to_usecs(
+			curr_time_us - hdd_ctx->bw_vote_time);
+	hdd_ctx->bw_vote_time = curr_time_us;
+
 	hdd_for_each_adapter_dev_held_safe(hdd_ctx, adapter, next_adapter,
 					   dbgid) {
 		/*
@@ -10195,6 +10205,12 @@ static void __hdd_bus_bw_work_handler(struct hdd_context *hdd_ctx)
 		con_sap_adapter->stats.rx_packets += ipa_rx_packets;
 	}
 
+	tx_packets = tx_packets * bw_interval_us;
+	tx_packets = qdf_do_div(tx_packets, (uint32_t)diff_us);
+
+	rx_packets = rx_packets * bw_interval_us;
+	rx_packets = qdf_do_div(rx_packets, (uint32_t)diff_us);
+
 	hdd_pld_request_bus_bandwidth(hdd_ctx, tx_packets, rx_packets);
 
 	return;
@@ -15575,6 +15591,7 @@ static void __hdd_bus_bw_compute_timer_start(struct hdd_context *hdd_ctx)
 {
 	qdf_periodic_work_start(&hdd_ctx->bus_bw_work,
 				hdd_ctx->config->bus_bw_compute_interval);
+	hdd_ctx->bw_vote_time = qdf_get_log_timestamp();
 }
 
 void hdd_bus_bw_compute_timer_start(struct hdd_context *hdd_ctx)
@@ -15609,6 +15626,7 @@ static void __hdd_bus_bw_compute_timer_stop(struct hdd_context *hdd_ctx)
 				      OL_TXRX_PDEV_ID);
 	cdp_pdev_reset_bundle_require_flag(cds_get_context(QDF_MODULE_ID_SOC),
 					   OL_TXRX_PDEV_ID);
+	hdd_ctx->bw_vote_time = 0;
 
 exit:
 	/**