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mt76: fix A-MPDU density handling

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The hardware requirements for A-MPDU density are entirely on the tx side,
not the rx side. Because of that, the IE value should stay at 0 and the
minimum value should instead be enforced in WTBL/TXWI

MT7615 has no restrictions here

Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Felix Fietkau 2020-04-20 16:34:16 +02:00
parent d0116058c7
commit 55961d8be3
3 changed files with 10 additions and 3 deletions
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1
drivers/net/wireless/mediatek/mt76/mac80211.c
View File

@ -198,7 +198,6 @@ mt76_init_sband(struct mt76_dev *dev, struct mt76_sband *msband,
ht_cap->mcs.tx_params = IEEE80211_HT_MCS_TX_DEFINED;
ht_cap->ampdu_factor = IEEE80211_HT_MAX_AMPDU_64K;
ht_cap->ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
mt76_init_stream_cap(dev, sband, vht);

5
drivers/net/wireless/mediatek/mt76/mt7603/mac.c
View File

@ -318,11 +318,16 @@ void mt7603_wtbl_update_cap(struct mt7603_dev *dev, struct ieee80211_sta *sta)
{
struct mt7603_sta *msta = (struct mt7603_sta *)sta->drv_priv;
int idx = msta->wcid.idx;
u8 ampdu_density;
u32 addr;
u32 val;
addr = mt7603_wtbl1_addr(idx);
ampdu_density = sta->ht_cap.ampdu_density;
if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4)
ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
val = mt76_rr(dev, addr + 2 * 4);
val &= MT_WTBL1_W2_KEY_TYPE | MT_WTBL1_W2_ADMISSION_CONTROL;
val |= FIELD_PREP(MT_WTBL1_W2_AMPDU_FACTOR, sta->ht_cap.ampdu_factor) |

7
drivers/net/wireless/mediatek/mt76/mt76x02_mac.c
View File

@ -409,6 +409,7 @@ void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi,
txwi->ack_ctl |= MT_TXWI_ACK_CTL_NSEQ;
if ((info->flags & IEEE80211_TX_CTL_AMPDU) && sta) {
u8 ba_size = IEEE80211_MIN_AMPDU_BUF;
u8 ampdu_density = sta->ht_cap.ampdu_density;
ba_size <<= sta->ht_cap.ampdu_factor;
ba_size = min_t(int, 63, ba_size - 1);
@ -416,9 +417,11 @@ void mt76x02_mac_write_txwi(struct mt76x02_dev *dev, struct mt76x02_txwi *txwi,
ba_size = 0;
txwi->ack_ctl |= FIELD_PREP(MT_TXWI_ACK_CTL_BA_WINDOW, ba_size);
if (ampdu_density < IEEE80211_HT_MPDU_DENSITY_4)
ampdu_density = IEEE80211_HT_MPDU_DENSITY_4;
txwi_flags |= MT_TXWI_FLAGS_AMPDU |
FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY,
sta->ht_cap.ampdu_density);
FIELD_PREP(MT_TXWI_FLAGS_MPDU_DENSITY, ampdu_density);
}
if (ieee80211_is_probe_resp(hdr->frame_control) ||