Re: [PATCH v3 1/8] mt76 - mt7915: Add ethtool stats support.

From: Ben Greear <redacted>

This exposes some tx-path stats to the ethtool API, so that
ethtool -S wlanX provides some more useful info.

Signed-off-by: Ben Greear <redacted>
---
v3:  Clean up checkpatch warnings.

 .../wireless/mediatek/mt76/mt7915/debugfs.c   | 135 ++++++++++++++++++
 .../net/wireless/mediatek/mt76/mt7915/main.c  |   3 +
 .../wireless/mediatek/mt76/mt7915/mt7915.h    |  12 ++
 3 files changed, 150 insertions(+)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
index 1a48b09d0cb7..469028d641c7 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/debugfs.c

@@ -382,4 +382,139 @@ void mt7915_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 {
 	debugfs_create_file("fixed_rate", 0600, dir, sta, &fops_fixed_rate);
 }
+

+
+void mt7915_debug_get_et_stats(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif,
+			       struct ethtool_stats *stats, u64 *data)
+{
+	struct mt7915_dev *dev = mt7915_hw_dev(hw);
+	struct mt7915_phy *phy = mt7915_hw_phy(hw);
+
+	/* TODO:  These are mostly dev-wide stats at this point.
+	 *  Get some per-vif stats?
+	 */
+
+	/* See mt7915_ampdu_stat_read_phy, etc */
+	bool ext_phy = phy != &dev->phy;
+	int i, n, cnt;
+	int ei = 0;
+
+	if (!phy)
+		return;
+
+	/* Tx ampdu stat */
+	n = ext_phy ? ARRAY_SIZE(dev->mt76.aggr_stats) / 2 : 0;
+	for (i = 0; i < 15 /*ARRAY_SIZE(bound)*/; i++)
+		data[ei++] = dev->mt76.aggr_stats[i + n];
+
+	data[ei++] = phy->mib.ba_miss_cnt;
+
+	/* Tx Beamformer monitor */
+	cnt = mt76_rr(dev, MT_ETBF_TX_APP_CNT(ext_phy));
+	data[ei++] = FIELD_GET(MT_ETBF_TX_IBF_CNT, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_TX_EBF_CNT, cnt);
+
+	/* Tx Beamformer Rx feedback monitor */
+	cnt = mt76_rr(dev, MT_ETBF_RX_FB_CNT(ext_phy));
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_ALL, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_HE, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_VHT, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_HT, cnt);
+
+	cnt = mt76_rr(dev, MT_ETBF_RX_FB_CONT(ext_phy));
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_BW, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_NC, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_RX_FB_NR, cnt);
+
+	/* Tx Beamformee Rx NDPA & Tx feedback report */
+	cnt = mt76_rr(dev, MT_ETBF_TX_NDP_BFRP(ext_phy));
+	data[ei++] = FIELD_GET(MT_ETBF_TX_FB_CPL, cnt);
+	data[ei++] = FIELD_GET(MT_ETBF_TX_FB_TRI, cnt);
+
+	/* Tx SU & MU counters */
+	cnt = mt76_rr(dev, MT_MIB_SDR34(ext_phy));
+	data[ei++] = FIELD_GET(MT_MIB_MU_BF_TX_CNT, cnt);
+
+	cnt = mt76_rr(dev, MT_MIB_DR8(ext_phy));
+	data[ei++] = cnt;
+
+	cnt = mt76_rr(dev, MT_MIB_DR9(ext_phy));
+	data[ei++] = cnt; /* MU MPDU SUccessful */
+
+	cnt = mt76_rr(dev, MT_MIB_DR11(ext_phy));
+	data[ei++] = cnt; /* SU MPDU successful */
+
+	/* TODO:  External phy too?? */
+
+	/* Tx amsdu info (pack-count histogram) */
+	for (i = 0; i < 8; i++)
+		data[ei++] = mt76_rr(dev,  MT_PLE_AMSDU_PACK_MSDU_CNT(i));
+
+	WARN_ON(ei != MT7915_SSTATS_LEN);
+}
+

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index 48b5e2051bad..ed94e3c3c51d 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c

@@ -1052,6 +1052,9 @@ const struct ieee80211_ops mt7915_ops = {
 	.get_txpower = mt76_get_txpower,
 	.channel_switch_beacon = mt7915_channel_switch_beacon,
 	.get_stats = mt7915_get_stats,
+	.get_et_sset_count = mt7915_debug_get_et_sset_count,
+	.get_et_stats = mt7915_debug_get_et_stats,
+	.get_et_strings = mt7915_debug_get_et_strings,
 	.get_tsf = mt7915_get_tsf,
 	.set_tsf = mt7915_set_tsf,
 	.offset_tsf = mt7915_offset_tsf,

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 33be449309e0..a3c78365db23 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h

@@ -419,4 +419,16 @@ void mt7915_sta_add_debugfs(struct ieee80211_hw *hw, struct ieee80211_vif *vif,
 			    struct ieee80211_sta *sta, struct dentry *dir);
 #endif
 
+/* Ethtool API, implementation found in debugfs.c */
+void mt7915_debug_get_et_strings(struct ieee80211_hw *hw,
+				 struct ieee80211_vif *vif,
+				 u32 sset, u8 *data);
+
+int mt7915_debug_get_et_sset_count(struct ieee80211_hw *hw,
+				   struct ieee80211_vif *vif, int sset);
+
+void mt7915_debug_get_et_stats(struct ieee80211_hw *hw,
+			       struct ieee80211_vif *vif,
+			       struct ethtool_stats *stats, u64 *data);
+
 #endif

-- 
2.20.1