1 files changed, 42 insertions, 0 deletions
diff --git a/drivers/net/wireless/mediatek/mt76/util.c b/drivers/net/wireless/mediatek/mt76/util.c
index 0c35b8db58cd..69270c1a9091 100644
--- a/drivers/net/wireless/mediatek/mt76/util.c
+++ b/drivers/net/wireless/mediatek/mt76/util.c
@@ -75,4 +75,46 @@ int mt76_wcid_alloc(unsigned long *mask, int size)
 }
 EXPORT_SYMBOL_GPL(mt76_wcid_alloc);
 
+int mt76_get_min_avg_rssi(struct mt76_dev *dev)
+{
+	struct mt76_wcid *wcid;
+	int i, j, min_rssi = 0;
+	s8 cur_rssi;
+
+	local_bh_disable();
+	rcu_read_lock();
+
+	for (i = 0; i < ARRAY_SIZE(dev->wcid_mask); i++) {
+		unsigned long mask = dev->wcid_mask[i];
+
+		if (!mask)
+			continue;
+
+		for (j = i * BITS_PER_LONG; mask; j++, mask >>= 1) {
+			if (!(mask & 1))
+				continue;
+
+			wcid = rcu_dereference(dev->wcid[j]);
+			if (!wcid)
+				continue;
+
+			spin_lock(&dev->rx_lock);
+			if (wcid->inactive_count++ < 5)
+				cur_rssi = -ewma_signal_read(&wcid->rssi);
+			else
+				cur_rssi = 0;
+			spin_unlock(&dev->rx_lock);
+
+			if (cur_rssi < min_rssi)
+				min_rssi = cur_rssi;
+		}
+	}
+
+	rcu_read_unlock();
+	local_bh_enable();
+
+	return min_rssi;
+}
+EXPORT_SYMBOL_GPL(mt76_get_min_avg_rssi);
+
 MODULE_LICENSE("Dual BSD/GPL");