rtlwifi: Add TX/RX throughput statistics in period

The statistic variables use u64 to get higher precision.
Signed-off-by: NPing-Ke Shih <pkshih@realtek.com>
Signed-off-by: NLarry Finger <Larry.Finger@lwfinger.net>
Cc: Yan-Hsuan Chuang <yhchuang@realtek.com>
Cc: Birming Chiu <birming@realtek.com>
Cc: Shaofu <shaofu@realtek.com>
Cc: Steven Ting <steventing@realtek.com>
Signed-off-by: NKalle Valo <kvalo@codeaurora.org>

drivers/net/wireless/realtek/rtlwifi/base.c

@@ -1998,6 +1998,22 @@ void rtl_watchdog_wq_callback(void *data)
 	rtlpriv->link_info.tx_busy_traffic = tx_busy_traffic;
 	rtlpriv->link_info.higher_busyrxtraffic = higher_busyrxtraffic;
 
+	rtlpriv->stats.txbytesunicast_inperiod =
+		rtlpriv->stats.txbytesunicast -
+		rtlpriv->stats.txbytesunicast_last;
+	rtlpriv->stats.rxbytesunicast_inperiod =
+		rtlpriv->stats.rxbytesunicast -
+		rtlpriv->stats.rxbytesunicast_last;
+	rtlpriv->stats.txbytesunicast_last = rtlpriv->stats.txbytesunicast;
+	rtlpriv->stats.rxbytesunicast_last = rtlpriv->stats.rxbytesunicast;
+
+	rtlpriv->stats.txbytesunicast_inperiod_tp =
+		(u32)(rtlpriv->stats.txbytesunicast_inperiod * 8 / 2 /
+		1024 / 1024);
+	rtlpriv->stats.rxbytesunicast_inperiod_tp =
+		(u32)(rtlpriv->stats.rxbytesunicast_inperiod * 8 / 2 /
+		1024 / 1024);
+
 	/* <3> DM */
 	if (!rtlpriv->cfg->mod_params->disable_watchdog)
 		rtlpriv->cfg->ops->dm_watchdog(hw);

drivers/net/wireless/realtek/rtlwifi/wifi.h

@@ -1013,10 +1013,17 @@ struct init_gain {
 };
 
 struct wireless_stats {
-	unsigned long txbytesunicast;
-	unsigned long txbytesmulticast;
-	unsigned long txbytesbroadcast;
-	unsigned long rxbytesunicast;
+	u64 txbytesunicast;
+	u64 txbytesmulticast;
+	u64 txbytesbroadcast;
+	u64 rxbytesunicast;
+
+	u64 txbytesunicast_inperiod;
+	u64 rxbytesunicast_inperiod;
+	u32 txbytesunicast_inperiod_tp;
+	u32 rxbytesunicast_inperiod_tp;
+	u64 txbytesunicast_last;
+	u64 rxbytesunicast_last;
 
 	long rx_snr_db[4];
 	/*Correct smoothed ss in Dbm, only used