qcacld-3.0: Fix invalid tx power in iw dev

Host driver rate limits successive get_txpower
calls within 3 seconds, and sends cached stats
from the hdd_stats. However, max_tx_power is
not updated in the hdd_stats. Therefore,
the cached tx power is always 0 dBm.

Also, the hdd_stats would be only updated when
CP stats are received from the firmware for
get_station/dump_station calls. get_station is not
periodically queried for SAP interface from the
framework. Therefore, tx power for SAP interface will
always be 0 even if hdd_stats gets updated.

To fix this, instead of hdd_stats, return the
max tx power from the pdev stats cached on the pdev.

Change-Id: I0c8d8baab790c7344bd8913158f8eda63736474e
CRs-Fixed: 3230649

components/cp_stats/dispatcher/inc/wlan_cp_stats_mc_ucfg_api.h

@@ -459,5 +459,11 @@ wlan_cfg80211_mc_bmiss_get_infra_cp_stats(
 {
 	return NULL;
 }
+
+static inline void
+ucfg_mc_cp_stats_get_tx_power(struct wlan_objmgr_vdev *vdev,
+			      int *dbm)
+{}
+
 #endif /* QCA_SUPPORT_CP_STATS */
 #endif /* __WLAN_CP_STATS_MC_UCFG_API_H__ */

core/hdd/src/wlan_hdd_power.c

@@ -90,6 +90,7 @@
 #include "qdf_types.h"
 #include <linux/cpuidle.h>
 #include <cdp_txrx_ctrl.h>
+#include <wlan_cp_stats_mc_ucfg_api.h>
 
 /* Preprocessor definitions and constants */
 #ifdef QCA_WIFI_EMULATION
@@ -3167,6 +3168,7 @@ static int __wlan_hdd_cfg80211_get_txpower(struct wiphy *wiphy,
 	struct hdd_adapter *adapter = WLAN_HDD_GET_PRIV_PTR(ndev);
 	int status;
 	static bool is_rate_limited;
+	struct wlan_objmgr_vdev *vdev;
 
 	hdd_enter_dev(ndev);
 
@@ -3215,7 +3217,13 @@ static int __wlan_hdd_cfg80211_get_txpower(struct wiphy *wiphy,
 	    is_rate_limited) {
 		hdd_debug("Modules not enabled/rate limited, use cached stats");
 		/* Send cached data to upperlayer*/
-		*dbm = adapter->hdd_stats.class_a_stat.max_pwr;
+		vdev = hdd_objmgr_get_vdev_by_user(adapter, WLAN_OSIF_POWER_ID);
+		if (!vdev) {
+			hdd_err("vdev is NULL");
+			return -EINVAL;
+		}
+		ucfg_mc_cp_stats_get_tx_power(vdev, dbm);
+		hdd_objmgr_put_vdev_by_user(vdev, WLAN_OSIF_POWER_ID);
 		return 0;
 	}