mt76: mt7915: move tx amsdu stats in mib_stats

Move tx_amsdu histogram stats in mib_stats structure since registers are
clear-on-read
Signed-off-by: Lorenzo Bianconi <lorenzo@kernel.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -199,7 +199,8 @@ mt7915_tx_stats_show(struct seq_file *file, void *data)
 {
 	struct mt7915_phy *phy = file->private;
 	struct mt7915_dev *dev = phy->dev;
-	int stat[8], i, n;
+	struct mib_stats *mib = &phy->mib;
+	int i;
 
 	mutex_lock(&dev->mt76.mutex);
 
@@ -209,16 +210,12 @@ mt7915_tx_stats_show(struct seq_file *file, void *data)
 
 	/* Tx amsdu info */
 	seq_puts(file, "Tx MSDU statistics:\n");
-	for (i = 0, n = 0; i < ARRAY_SIZE(stat); i++) {
-		stat[i] = mt76_rr(dev,  MT_PLE_AMSDU_PACK_MSDU_CNT(i));
-		n += stat[i];
-	}
-
-	for (i = 0; i < ARRAY_SIZE(stat); i++) {
-		seq_printf(file, "AMSDU pack count of %d MSDU in TXD: 0x%x ",
-			   i + 1, stat[i]);
-		if (n != 0)
-			seq_printf(file, "(%d%%)\n", stat[i] * 100 / n);
+	for (i = 0; i < ARRAY_SIZE(mib->tx_amsdu); i++) {
+		seq_printf(file, "AMSDU pack count of %d MSDU in TXD: %8d ",
+			   i + 1, mib->tx_amsdu[i]);
+		if (mib->tx_amsdu_cnt)
+			seq_printf(file, "(%3d%%)\n",
+				   mib->tx_amsdu[i] * 100 / mib->tx_amsdu_cnt);
 		else
 			seq_puts(file, "\n");
 	}

drivers/net/wireless/mediatek/mt76/mt7915/mac.c

@@ -2023,6 +2023,12 @@ void mt7915_mac_update_stats(struct mt7915_phy *phy)
 	mib->tx_bf_fb_cpl_cnt += FIELD_GET(MT_ETBF_TX_FB_CPL, cnt);
 	mib->tx_bf_fb_trig_cnt += FIELD_GET(MT_ETBF_TX_FB_TRI, cnt);
 
+	for (i = 0; i < ARRAY_SIZE(mib->tx_amsdu); i++) {
+		cnt = mt76_rr(dev, MT_PLE_AMSDU_PACK_MSDU_CNT(i));
+		mib->tx_amsdu[i] += cnt;
+		mib->tx_amsdu_cnt += cnt;
+	}
+
 	aggr0 = ext_phy ? ARRAY_SIZE(dev->mt76.aggr_stats) / 2 : 0;
 	for (i = 0, aggr1 = aggr0 + 4; i < 4; i++) {
 		u32 val;

drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -1260,8 +1260,8 @@ void mt7915_get_et_stats(struct ieee80211_hw *hw,
 	data[ei++] = mib->tx_su_acked_mpdu_cnt;
 
 	/* Tx amsdu info (pack-count histogram) */
-	for (i = 0; i < 8; i++)
-		data[ei++] = mt76_rr(dev,  MT_PLE_AMSDU_PACK_MSDU_CNT(i));
+	for (i = 0; i < ARRAY_SIZE(mib->tx_amsdu); i++)
+		data[ei++] = mib->tx_amsdu[i];
 
 	/* rx counters */
 	data[ei++] = mib->rx_fifo_full_cnt;

drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -183,6 +183,9 @@ struct mib_stats {
 	u32 rx_pfdrop_cnt;
 	u32 rx_vec_queue_overflow_drop_cnt;
 	u32 rx_ba_cnt;
+
+	u32 tx_amsdu[8];
+	u32 tx_amsdu_cnt;
 };
 
 struct mt7915_hif {