[PATCH 5.11 467/601] mt76: mt7915: fix mib stats counter reporting to mac80211

Greg Kroah-Hartman
2021-05-12T17:55:45Z

From: Ryder Lee <ryder.lee@mediatek.com>

[ Upstream commit 2b35050a321865859fd2f12a3c18ed7be27858c9 ]

In order to properly report MIB counters to mac80211, resets stats in
mt7915_get_stats routine() and hold mt76 mutex accessing MIB counters.
Sum up MIB counters in mt7915_mac_update_mib_stats routine.

Fixes: e57b7901469f ("mt76: add mac80211 driver for MT7915 PCIe-based chipsets")
Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
.../net/wireless/mediatek/mt76/mt7915/mac.c | 35 +++++++------------
.../net/wireless/mediatek/mt76/mt7915/main.c | 6 ++++
.../wireless/mediatek/mt76/mt7915/mt7915.h | 10 +++---
3 files changed, 24 insertions(+), 27 deletions(-)

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
index 8a083304ab03..dc2b8c72e7f0 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mac.c
@@ -1598,39 +1598,30 @@ mt7915_mac_update_mib_stats(struct mt7915_phy *phy)
bool ext_phy = phy != &dev->phy;
int i, aggr0, aggr1;

- memset(mib, 0, sizeof(*mib));
-
- mib->fcs_err_cnt = mt76_get_field(dev, MT_MIB_SDR3(ext_phy),
- MT_MIB_SDR3_FCS_ERR_MASK);
+ mib->fcs_err_cnt += mt76_get_field(dev, MT_MIB_SDR3(ext_phy),
+ MT_MIB_SDR3_FCS_ERR_MASK);

aggr0 = ext_phy ? ARRAY_SIZE(dev->mt76.aggr_stats) / 2 : 0;
for (i = 0, aggr1 = aggr0 + 4; i < 4; i++) {
- u32 val, val2;
+ u32 val;

val = mt76_rr(dev, MT_MIB_MB_SDR1(ext_phy, i));
-
- val2 = FIELD_GET(MT_MIB_ACK_FAIL_COUNT_MASK, val);
- if (val2 > mib->ack_fail_cnt)
- mib->ack_fail_cnt = val2;
-
- val2 = FIELD_GET(MT_MIB_BA_MISS_COUNT_MASK, val);
- if (val2 > mib->ba_miss_cnt)
- mib->ba_miss_cnt = val2;
+ mib->ba_miss_cnt += FIELD_GET(MT_MIB_BA_MISS_COUNT_MASK, val);
+ mib->ack_fail_cnt +=
+ FIELD_GET(MT_MIB_ACK_FAIL_COUNT_MASK, val);

val = mt76_rr(dev, MT_MIB_MB_SDR0(ext_phy, i));
- val2 = FIELD_GET(MT_MIB_RTS_RETRIES_COUNT_MASK, val);
- if (val2 > mib->rts_retries_cnt) {
- mib->rts_cnt = FIELD_GET(MT_MIB_RTS_COUNT_MASK, val);
- mib->rts_retries_cnt = val2;
- }
+ mib->rts_cnt += FIELD_GET(MT_MIB_RTS_COUNT_MASK, val);
+ mib->rts_retries_cnt +=
+ FIELD_GET(MT_MIB_RTS_RETRIES_COUNT_MASK, val);

val = mt76_rr(dev, MT_TX_AGG_CNT(ext_phy, i));
- val2 = mt76_rr(dev, MT_TX_AGG_CNT2(ext_phy, i));
-
dev->mt76.aggr_stats[aggr0++] += val & 0xffff;
dev->mt76.aggr_stats[aggr0++] += val >> 16;
- dev->mt76.aggr_stats[aggr1++] += val2 & 0xffff;
- dev->mt76.aggr_stats[aggr1++] += val2 >> 16;
+
+ val = mt76_rr(dev, MT_TX_AGG_CNT2(ext_phy, i));
+ dev->mt76.aggr_stats[aggr1++] += val & 0xffff;
+ dev->mt76.aggr_stats[aggr1++] += val >> 16;
}
}

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/main.c b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
index 0c82aa2ef219..2fa511ace45c 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/main.c
@@ -711,13 +711,19 @@ mt7915_get_stats(struct ieee80211_hw *hw,
struct ieee80211_low_level_stats *stats)
{
struct mt7915_phy *phy = mt7915_hw_phy(hw);
+ struct mt7915_dev *dev = mt7915_hw_dev(hw);
struct mib_stats *mib = &phy->mib;

+ mutex_lock(&dev->mt76.mutex);
stats->dot11RTSSuccessCount = mib->rts_cnt;
stats->dot11RTSFailureCount = mib->rts_retries_cnt;
stats->dot11FCSErrorCount = mib->fcs_err_cnt;
stats->dot11ACKFailureCount = mib->ack_fail_cnt;

+ memset(mib, 0, sizeof(*mib));
+
+ mutex_unlock(&dev->mt76.mutex);
+
return 0;
}

diff --git a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
index 94bed8a3a050..fe88ff24f241 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7915/mt7915.h
@@ -100,11 +100,11 @@ struct mt7915_vif {
};

struct mib_stats {
- u16 ack_fail_cnt;
- u16 fcs_err_cnt;
- u16 rts_cnt;
- u16 rts_retries_cnt;
- u16 ba_miss_cnt;
+ u32 ack_fail_cnt;
+ u32 fcs_err_cnt;
+ u32 rts_cnt;
+ u32 rts_retries_cnt;
+ u32 ba_miss_cnt;
};

struct mt7915_phy {
--
2.30.2