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From:   greearb@candelatech.com
To:     linux-wireless@vger.kernel.org
Cc:     Ben Greear <greearb@candelatech.com>
Subject: [PATCH v5 2/7] mt76 - mt7915: Add tx stats gathered from tx-status callbacks.
Date:   Mon, 26 Jul 2021 10:29:55 -0700
Message-Id: <20210726173000.23807-2-greearb@candelatech.com>
In-Reply-To: <20210726173000.23807-1-greearb@candelatech.com>
References: <20210726173000.23807-1-greearb@candelatech.com>
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From: Ben Greear <greearb@candelatech.com>

Add tx-mode (ofdma, ht, vht, HE) histogram,
tx-ru-idx histogram, and tx-bandwidth histogram.
Also add tx attempts and tx success counters.

All of this is per-station.

Signed-off-by: Ben Greear <greearb@candelatech.com>
---
 drivers/net/wireless/mediatek/mt76/mt76.h     |  1 +
 .../net/wireless/mediatek/mt76/mt7915/mac.c   | 36 +++++++++++++++----
 .../wireless/mediatek/mt76/mt7915/mt7915.h    | 14 ++++++++
 3 files changed, 44 insertions(+), 7 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt76.h b/drivers/net/wireless/mediatek/mt76/mt76.h
index b41faedee001..436bf2b8e2cd 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76.h
@@ -755,6 +755,7 @@ enum mt76_phy_type {
 	MT_PHY_TYPE_HE_EXT_SU,
 	MT_PHY_TYPE_HE_TB,
 	MT_PHY_TYPE_HE_MU,
+	MT_PHY_TYPE_HE_LAST, /* keep last */
 };
 
 #define CCK_RATE(_idx, _rate) {					\
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index f1574538315d..6f445999e516 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1304,7 +1304,7 @@ mt7915_mac_tx_free(struct mt7915_dev *dev, struct sk_buff *skb)
 
 static bool
 mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
-		       __le32 *txs_data)
+		       __le32 *txs_data, struct mt7915_sta_stats *stats)
 {
 	struct ieee80211_supported_band *sband;
 	struct mt76_dev *mdev = &dev->mt76;
@@ -1314,7 +1314,7 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 	struct rate_info rate = {};
 	struct sk_buff *skb;
 	bool cck = false;
-	u32 txrate, txs;
+	u32 txrate, txs, txs5, txs6, txs7, mode;
 
 	mt76_tx_status_lock(mdev, &list);
 	skb = mt76_tx_status_skb_get(mdev, wcid, pid, &list);
@@ -1322,6 +1322,9 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 		goto out;
 
 	txs = le32_to_cpu(txs_data[0]);
+	txs5 = le32_to_cpu(txs_data[5]);
+	txs6 = le32_to_cpu(txs_data[6]);
+	txs7 = le32_to_cpu(txs_data[7]);
 
 	info = IEEE80211_SKB_CB(skb);
 	if (!(txs & MT_TXS0_ACK_ERROR_MASK))
@@ -1333,15 +1336,27 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 
 	info->status.rates[0].idx = -1;
 
-	if (!wcid->sta)
-		goto out;
+	stats->tx_mpdu_attempts += FIELD_GET(MT_TXS5_F1_MPDU_TX_COUNT, txs5);
+	stats->tx_mpdu_fail += FIELD_GET(MT_TXS6_F1_MPDU_FAIL_COUNT, txs6);
+	stats->tx_mpdu_retry += FIELD_GET(MT_TXS7_F1_MPDU_RETRY_COUNT, txs7);
 
 	txrate = FIELD_GET(MT_TXS0_TX_RATE, txs);
 
 	rate.mcs = FIELD_GET(MT_TX_RATE_IDX, txrate);
 	rate.nss = FIELD_GET(MT_TX_RATE_NSS, txrate) + 1;
 
-	switch (FIELD_GET(MT_TX_RATE_MODE, txrate)) {
+	stats->tx_nss[rate.nss - 1]++;
+	/* It appears that rate.mcs even for HT may be small, considering in HT
+	 * code below it is multiplied... but not certain on that,
+	 * so code safely.
+	 */
+	if (rate.mcs >= ARRAY_SIZE(stats->tx_mcs))
+		stats->tx_mcs[ARRAY_SIZE(stats->tx_mcs) - 1]++;
+	else
+		stats->tx_mcs[rate.mcs]++;
+
+	mode = FIELD_GET(MT_TX_RATE_MODE, txrate);
+	switch (mode) {
 	case MT_PHY_TYPE_CCK:
 		cck = true;
 		fallthrough;
@@ -1389,18 +1404,24 @@ mt7915_mac_add_txs_skb(struct mt7915_dev *dev, struct mt76_wcid *wcid, int pid,
 		goto out;
 	}
 
+	stats->tx_mode[mode]++;
+
 	switch (FIELD_GET(MT_TXS0_BW, txs)) {
 	case IEEE80211_STA_RX_BW_160:
 		rate.bw = RATE_INFO_BW_160;
+		stats->tx_bw[3]++;
 		break;
 	case IEEE80211_STA_RX_BW_80:
 		rate.bw = RATE_INFO_BW_80;
+		stats->tx_bw[2]++;
 		break;
 	case IEEE80211_STA_RX_BW_40:
 		rate.bw = RATE_INFO_BW_40;
+		stats->tx_bw[1]++;
 		break;
 	default:
 		rate.bw = RATE_INFO_BW_20;
+		stats->tx_bw[0]++;
 		break;
 	}
 	wcid->rate = rate;
@@ -1443,12 +1464,13 @@ static void mt7915_mac_add_txs(struct mt7915_dev *dev, void *data)
 	if (!wcid)
 		goto out;
 
-	mt7915_mac_add_txs_skb(dev, wcid, pid, txs_data);
+	msta = container_of(wcid, struct mt7915_sta, wcid);
+
+	mt7915_mac_add_txs_skb(dev, wcid, pid, txs_data, &msta->stats);
 
 	if (!wcid->sta)
 		goto out;
 
-	msta = container_of(wcid, struct mt7915_sta, wcid);
 	spin_lock_bh(&dev->sta_poll_lock);
 	if (list_empty(&msta->poll_list))
 		list_add_tail(&msta->poll_list, &dev->sta_poll_list);
diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 33be449309e0..a8617ba69a21 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -64,6 +64,16 @@ enum mt7915_rxq_id {
 	MT7915_RXQ_MCU_WA_EXT,
 };
 
+struct mt7915_sta_stats {
+	unsigned long tx_mpdu_attempts;
+	unsigned long tx_mpdu_fail;
+	unsigned long tx_mpdu_retry;
+	unsigned long tx_mode[MT_PHY_TYPE_HE_LAST]; /* See mt76_phy_type */
+	unsigned long tx_bw[4]; /* 20, 40, 80, 160 */
+	unsigned long tx_nss[4]; /* 1, 2, 3, 4 */
+	unsigned long tx_mcs[16]; /* mcs idx */
+};
+
 struct mt7915_sta_key_conf {
 	s8 keyidx;
 	u8 key[16];
@@ -82,8 +92,11 @@ struct mt7915_sta {
 	unsigned long jiffies;
 	unsigned long ampdu_state;
 
+	struct mt7915_sta_stats stats;
+
 	struct mt7915_sta_key_conf bip;
 };
+
 struct mt7915_vif {
 	u16 idx;
 	u8 omac_idx;
@@ -103,6 +116,7 @@ struct mib_stats {
 	u32 rts_cnt;
 	u32 rts_retries_cnt;
 	u32 ba_miss_cnt;
+	/* Add more stats here, updated from mac_update_stats */
 };
 
 struct mt7915_hif {
-- 
2.20.1