Report tx rate from tx status packets instead of receiving periodic mcu
event. This improves flexibility, accuracy and AQL performance, and
simplifies code flow for better readability.
Signed-off-by: Lorenzo Bianconi <lorenzo@xxxxxxxxxx>
---
.../net/wireless/mediatek/mt76/mt7921/mac.c | 229 +++++++++++-------
.../net/wireless/mediatek/mt76/mt7921/mac.h | 15 +-
.../net/wireless/mediatek/mt76/mt7921/main.c | 22 +-
.../wireless/mediatek/mt76/mt7921/mt7921.h | 2 -
4 files changed, 166 insertions(+), 102 deletions(-)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
index 83eed0797314..f869a73c7c56 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.c
@@ -61,6 +61,7 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
struct mt7921_sta *msta;
u32 tx_time[IEEE80211_NUM_ACS], rx_time[IEEE80211_NUM_ACS];
LIST_HEAD(sta_poll_list);
+ struct rate_info *rate;
int i;
spin_lock_bh(&dev->sta_poll_lock);
@@ -71,8 +72,9 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
while (true) {
bool clear = false;
- u32 addr;
+ u32 addr, val;
u16 idx;
+ u8 bw;
spin_lock_bh(&dev->sta_poll_lock);
if (list_empty(&sta_poll_list)) {
@@ -85,7 +87,7 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
spin_unlock_bh(&dev->sta_poll_lock);
idx = msta->wcid.idx;
- addr = MT_WTBL_LMAC_OFFS(idx, 0) + 20 * 4;
+ addr = mt7921_mac_wtbl_lmac_addr(idx, MT_WTBL_AC0_CTT_OFFSET);
for (i = 0; i < IEEE80211_NUM_ACS; i++) {
u32 tx_last = msta->airtime_ac[i];
@@ -126,6 +128,43 @@ static void mt7921_mac_sta_poll(struct mt7921_dev *dev)
ieee80211_sta_register_airtime(sta, tid, tx_cur,
rx_cur);
}
+
+ /* We don't support reading GI info from txs packets.
+ * For accurate tx status reporting and AQL improvement,
+ * we need to make sure that flags match so polling GI
+ * from per-sta counters directly.
+ */
+ rate = &msta->wcid.rate;
+ addr = mt7921_mac_wtbl_lmac_addr(idx,
+ MT_WTBL_TXRX_CAP_RATE_OFFSET);
+ val = mt76_rr(dev, addr);
+
+ switch (rate->bw) {
+ case RATE_INFO_BW_160:
+ bw = IEEE80211_STA_RX_BW_160;
+ break;
+ case RATE_INFO_BW_80:
+ bw = IEEE80211_STA_RX_BW_80;
+ break;
+ case RATE_INFO_BW_40:
+ bw = IEEE80211_STA_RX_BW_40;
+ break;
+ default:
+ bw = IEEE80211_STA_RX_BW_20;
+ break;
+ }
+
+ if (rate->flags & RATE_INFO_FLAGS_HE_MCS) {
+ u8 offs = MT_WTBL_TXRX_RATE_G2_HE + 2 * bw;
+
+ rate->he_gi = (val & (0x3 << offs)) >> offs;
+ } else if (rate->flags &
+ (RATE_INFO_FLAGS_VHT_MCS | RATE_INFO_FLAGS_MCS)) {
+ if (val & BIT(MT_WTBL_TXRX_RATE_G2 + bw))
+ rate->flags |= RATE_INFO_FLAGS_SHORT_GI;
+ else
+ rate->flags &= ~RATE_INFO_FLAGS_SHORT_GI;
+ }
}
rcu_read_unlock();
@@ -783,24 +822,6 @@ mt7921_mac_write_txwi_80211(struct mt7921_dev *dev, __le32 *txwi,
txwi[7] |= cpu_to_le32(val);
}
-static void mt7921_update_txs(struct mt76_wcid *wcid, __le32 *txwi)
-{
- struct mt7921_sta *msta = container_of(wcid, struct mt7921_sta, wcid);
- u32 pid, frame_type;
-
- frame_type = FIELD_GET(MT_TXD2_FRAME_TYPE, le32_to_cpu(txwi[2]));
- if (!(frame_type & (IEEE80211_FTYPE_DATA >> 2)))
- return;
-
- if (time_is_after_eq_jiffies(msta->next_txs_ts))
- return;
-
- msta->next_txs_ts = jiffies + msecs_to_jiffies(250);
- pid = mt76_get_next_pkt_id(wcid);
- txwi[5] |= cpu_to_le32(MT_TXD5_TX_STATUS_MCU |
- FIELD_PREP(MT_TXD5_PID, pid));
-}
-
static void
mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
struct sk_buff *skb, struct mt76_wcid *wcid,
@@ -885,8 +906,6 @@ mt7921_mac_write_txwi(struct mt7921_dev *dev, __le32 *txwi,
txwi[6] |= cpu_to_le32(val);
txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
}
-
- mt7921_update_txs(wcid, txwi);
}
static void
@@ -928,10 +947,9 @@ int mt7921_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
struct mt7921_dev *dev = container_of(mdev, struct mt7921_dev, mt76);
struct ieee80211_tx_info *info = IEEE80211_SKB_CB(tx_info->skb);
struct ieee80211_key_conf *key = info->control.hw_key;
- struct mt76_tx_cb *cb = mt76_tx_skb_cb(tx_info->skb);
struct mt76_txwi_cache *t;
struct mt7921_txp_common *txp;
- int id;
+ int id, pid;
u8 *txwi = (u8 *)txwi_ptr;
if (unlikely(tx_info->skb->len <= ETH_HLEN))
@@ -940,8 +958,6 @@ int mt7921_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
if (!wcid)
wcid = &dev->mt76.global_wcid;
- cb->wcid = wcid->idx;
-
t = (struct mt76_txwi_cache *)(txwi + mdev->drv->txwi_size);
t->skb = tx_info->skb;
@@ -949,8 +965,18 @@ int mt7921_tx_prepare_skb(struct mt76_dev *mdev, void *txwi_ptr,
if (id < 0)
return id;
+ if (sta) {
+ struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
+
+ if (time_after(jiffies, msta->stats.jiffies + HZ / 4)) {
+ info->flags |= IEEE80211_TX_CTL_REQ_TX_STATUS;
+ msta->stats.jiffies = jiffies;
+ }
+ }
+
+ pid = mt76_tx_status_skb_add(mdev, wcid, tx_info->skb);
mt7921_mac_write_txwi(dev, txwi_ptr, tx_info->skb, wcid, key,
- MT_PACKET_ID_NO_SKB, false);
+ pid, false);
txp = (struct mt7921_txp_common *)(txwi + MT_TXD_SIZE);
memset(txp, 0, sizeof(struct mt7921_txp_common));
@@ -986,42 +1012,6 @@ mt7921_tx_check_aggr(struct ieee80211_sta *sta, __le32 *txwi)
ieee80211_start_tx_ba_session(sta, tid, 0);
}
-static void
-mt7921_tx_complete_status(struct mt76_dev *mdev, struct sk_buff *skb,
- struct ieee80211_sta *sta, bool clear_status,
- struct list_head *free_list)
-{
- struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
- struct ieee80211_tx_status status = {
- .sta = sta,
- .info = info,
- .skb = skb,
- .free_list = free_list,
- };
- struct ieee80211_hw *hw;
-
- if (sta) {
- struct mt7921_sta *msta;
-
- msta = (struct mt7921_sta *)sta->drv_priv;
- status.rate = &msta->stats.tx_rate;
- }
-
- hw = mt76_tx_status_get_hw(mdev, skb);
-
- if (info->flags & IEEE80211_TX_CTL_AMPDU)
- info->flags |= IEEE80211_TX_STAT_AMPDU;
-
- if (clear_status)
- ieee80211_tx_info_clear_status(info);
-
- if (!(info->flags & IEEE80211_TX_CTL_NO_ACK))
- info->flags |= IEEE80211_TX_STAT_ACK;
-
- info->status.tx_time = 0;
- ieee80211_tx_status_ext(hw, &status);
-}
-
static void
mt7921_txp_skb_unmap(struct mt76_dev *dev, struct mt76_txwi_cache *t)
{
@@ -1059,31 +1049,27 @@ mt7921_txwi_free(struct mt7921_dev *dev, struct mt76_txwi_cache *t,
struct list_head *free_list)
{
struct mt76_dev *mdev = &dev->mt76;
- struct ieee80211_tx_info *info;
__le32 *txwi;
+ u16 wcid_idx;
mt7921_txp_skb_unmap(mdev, t);
if (!t->skb)
goto out;
- if (!sta)
- goto out;
-
txwi = (__le32 *)mt76_get_txwi_ptr(mdev, t);
- if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE)))
- mt7921_tx_check_aggr(sta, txwi);
-
- info = IEEE80211_SKB_CB(t->skb);
- if (!info->tx_time_est) {
+ if (sta) {
struct mt76_wcid *wcid = (struct mt76_wcid *)sta->drv_priv;
- int pending;
- pending = atomic_dec_return(&wcid->non_aql_packets);
- if (pending < 0)
- atomic_cmpxchg(&wcid->non_aql_packets, pending, 0);
+ if (likely(t->skb->protocol != cpu_to_be16(ETH_P_PAE)))
+ mt7921_tx_check_aggr(sta, txwi);
+
+ wcid_idx = wcid->idx;
+ } else {
+ wcid_idx = FIELD_GET(MT_TXD1_WLAN_IDX, le32_to_cpu(txwi[1]));
}
- mt7921_tx_complete_status(mdev, t->skb, sta, clear_status, free_list);
+ __mt76_tx_complete_skb(mdev, wcid_idx, t->skb, free_list);
+
out:
t->skb = NULL;
mt76_put_txwi(mdev, t);
@@ -1169,10 +1155,14 @@ static bool
mt7921_mac_add_txs_skb(struct mt7921_dev *dev, struct mt76_wcid *wcid, int pid,
__le32 *txs_data)
{
+ struct ieee80211_supported_band *sband;
struct mt76_dev *mdev = &dev->mt76;
struct ieee80211_tx_info *info;
+ struct rate_info rate = {};
struct sk_buff_head list;
struct sk_buff *skb;
+ bool cck = false;
+ u32 txrate, txs;
mt76_tx_status_lock(mdev, &list);
skb = mt76_tx_status_skb_get(mdev, wcid, pid, &list);
@@ -1180,7 +1170,8 @@ mt7921_mac_add_txs_skb(struct mt7921_dev *dev, struct mt76_wcid *wcid, int pid,
goto out;
info = IEEE80211_SKB_CB(skb);
- if (!(txs_data[0] & le32_to_cpu(MT_TXS0_ACK_ERROR_MASK)))
+ txs = le32_to_cpu(txs_data[0]);
+ if (!(txs & MT_TXS0_ACK_ERROR_MASK))
info->flags |= IEEE80211_TX_STAT_ACK;
info->status.ampdu_len = 1;
@@ -1188,9 +1179,78 @@ mt7921_mac_add_txs_skb(struct mt7921_dev *dev, struct mt76_wcid *wcid, int pid,
IEEE80211_TX_STAT_ACK);
info->status.rates[0].idx = -1;
- mt76_tx_status_skb_done(mdev, skb, &list);
+
+ if (!wcid->sta)
+ goto out;
+
+ 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)) {
+ case MT_PHY_TYPE_CCK:
+ cck = true;
+ fallthrough;
+ case MT_PHY_TYPE_OFDM:
+ if (dev->mphy.chandef.chan->band == NL80211_BAND_5GHZ)
+ sband = &dev->mphy.sband_5g.sband;
+ else
+ sband = &dev->mphy.sband_2g.sband;
+
+ rate.mcs = mt76_get_rate(dev->mphy.dev, sband, rate.mcs, cck);
+ rate.legacy = sband->bitrates[rate.mcs].bitrate;
+ break;
+ case MT_PHY_TYPE_HT:
+ case MT_PHY_TYPE_HT_GF:
+ rate.mcs += (rate.nss - 1) * 8;
+ if (rate.mcs > 31)
+ goto out;
+
+ rate.flags = RATE_INFO_FLAGS_MCS;
+ if (wcid->rate.flags & RATE_INFO_FLAGS_SHORT_GI)
+ rate.flags |= RATE_INFO_FLAGS_SHORT_GI;
+ break;
+ case MT_PHY_TYPE_VHT:
+ if (rate.mcs > 9)
+ goto out;
+
+ rate.flags = RATE_INFO_FLAGS_VHT_MCS;
+ break;
+ case MT_PHY_TYPE_HE_SU:
+ case MT_PHY_TYPE_HE_EXT_SU:
+ case MT_PHY_TYPE_HE_TB:
+ case MT_PHY_TYPE_HE_MU:
+ if (rate.mcs > 11)
+ goto out;
+
+ rate.he_gi = wcid->rate.he_gi;
+ rate.he_dcm = FIELD_GET(MT_TX_RATE_DCM, txrate);
+ rate.flags = RATE_INFO_FLAGS_HE_MCS;
+ break;
+ default:
+ goto out;
+ }
+
+ switch (FIELD_GET(MT_TXS0_BW, txs)) {
+ case IEEE80211_STA_RX_BW_160:
+ rate.bw = RATE_INFO_BW_160;
+ break;
+ case IEEE80211_STA_RX_BW_80:
+ rate.bw = RATE_INFO_BW_80;
+ break;
+ case IEEE80211_STA_RX_BW_40:
+ rate.bw = RATE_INFO_BW_40;
+ break;
+ default:
+ rate.bw = RATE_INFO_BW_20;
+ break;
+ }
+ wcid->rate = rate;
out:
+ if (skb)
+ mt76_tx_status_skb_done(mdev, skb, &list);
mt76_tx_status_unlock(mdev, &list);
return !!skb;
@@ -1305,15 +1365,8 @@ void mt7921_tx_complete_skb(struct mt76_dev *mdev, struct mt76_queue_entry *e)
e->skb = t ? t->skb : NULL;
}
- if (e->skb) {
- struct mt76_tx_cb *cb = mt76_tx_skb_cb(e->skb);
- struct mt76_wcid *wcid;
-
- wcid = rcu_dereference(dev->mt76.wcid[cb->wcid]);
-
- mt7921_tx_complete_status(mdev, e->skb, wcid_to_sta(wcid), 0,
- NULL);
- }
+ if (e->skb)
+ mt76_tx_complete_skb(mdev, e->wcid, e->skb);
}
void mt7921_mac_reset_counters(struct mt7921_phy *phy)
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
index 4b29d2728f4d..ad2e52c97aa8 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mac.h
@@ -317,8 +317,10 @@ struct mt7921_tx_free {
/* will support this field in further revision */
#define MT_TX_FREE_RATE GENMASK(13, 0)
-#define MT_TXS0_ACK_ERROR_MASK GENMASK(18, 16)
+#define MT_TXS0_BW GENMASK(30, 29)
#define MT_TXS0_TXS_FORMAT GENMASK(24, 23)
+#define MT_TXS0_ACK_ERROR_MASK GENMASK(18, 16)
+#define MT_TXS0_TX_RATE GENMASK(13, 0)
#define MT_TXS2_WCID GENMASK(25, 16)
@@ -365,4 +367,15 @@ struct mt7921_txp_common {
};
};
+#define MT_WTBL_TXRX_CAP_RATE_OFFSET 7
+#define MT_WTBL_TXRX_RATE_G2_HE 24
+#define MT_WTBL_TXRX_RATE_G2 12
+
+#define MT_WTBL_AC0_CTT_OFFSET 20
+
+static inline u32 mt7921_mac_wtbl_lmac_addr(int idx, u8 offset)
+{
+ return MT_WTBL_LMAC_OFFS(idx, 0) + offset * 4;
+}
+
#endif
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/main.c b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
index 7ce014de3443..874c7c18ad09 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/main.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/main.c
@@ -1012,22 +1012,22 @@ static void mt7921_sta_statistics(struct ieee80211_hw *hw,
struct station_info *sinfo)
{
struct mt7921_sta *msta = (struct mt7921_sta *)sta->drv_priv;
- struct mt7921_sta_stats *stats = &msta->stats;
+ struct rate_info *txrate = &msta->wcid.rate;
- if (!stats->tx_rate.legacy && !stats->tx_rate.flags)
+ if (!txrate->legacy && !txrate->flags)
return;
- if (stats->tx_rate.legacy) {
- sinfo->txrate.legacy = stats->tx_rate.legacy;
+ if (txrate->legacy) {
+ sinfo->txrate.legacy = txrate->legacy;
} else {
- sinfo->txrate.mcs = stats->tx_rate.mcs;
- sinfo->txrate.nss = stats->tx_rate.nss;
- sinfo->txrate.bw = stats->tx_rate.bw;
- sinfo->txrate.he_gi = stats->tx_rate.he_gi;
- sinfo->txrate.he_dcm = stats->tx_rate.he_dcm;
- sinfo->txrate.he_ru_alloc = stats->tx_rate.he_ru_alloc;
+ sinfo->txrate.mcs = txrate->mcs;
+ sinfo->txrate.nss = txrate->nss;
+ sinfo->txrate.bw = txrate->bw;
+ sinfo->txrate.he_gi = txrate->he_gi;
+ sinfo->txrate.he_dcm = txrate->he_dcm;
+ sinfo->txrate.he_ru_alloc = txrate->he_ru_alloc;
}
- sinfo->txrate.flags = stats->tx_rate.flags;
+ sinfo->txrate.flags = txrate->flags;
sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_BITRATE);
}
diff --git a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
index 761fc605e5e9..26f175ef505e 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
+++ b/drivers/net/wireless/mediatek/mt76/mt7921/mt7921.h
@@ -93,8 +93,6 @@ struct mt7921_sta {
unsigned long ampdu_state;
struct mt7921_sta_key_conf bip;
-
- unsigned long next_txs_ts;
};
DECLARE_EWMA(rssi, 10, 8);
--
2.31.1
