wifi: mt76: mt7996: enable BSS_CHANGED_BASIC_RATES support

The connac3 removes fixed rate fields to reduce txd size and introduces
global rate tables (64 entries) for rate setting. Driver needs to fill
the corresponding idx in MT_TXD6_TX_RATE while tx, and push mt76_rate
into predifined table at bootup stage so that  mvif->basic_rates_idx
can immediately switch out once setting changes.

spe_idx is also needed for fixed rate frames, and will be updated by
future patches.

Note that all table entries are shared across driver and firmware
(i.e.TxBF), hence adding MT7996_BASIC_RATES_TBL to reflect mapping
status.

Signed-off-by: Ryder Lee <ryder.lee@mediatek.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 15 insertions, 17 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
index 1e9452c33e47..c8ada309d73f 100644
--- a/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
+++ b/drivers/net/wireless/mediatek/mt76/mt7996/mac.c
@@ -252,6 +252,17 @@ void mt7996_mac_enable_rtscts(struct mt7996_dev *dev,
 		mt76_clear(dev, addr, BIT(5));
 }
 
+void mt7996_mac_set_fixed_rate_table(struct mt7996_dev *dev,
+				     u8 tbl_idx, u16 rate_idx)
+{
+	u32 ctrl = MT_WTBL_ITCR_WR | MT_WTBL_ITCR_EXEC | tbl_idx;
+
+	mt76_wr(dev, MT_WTBL_ITDR0, rate_idx);
+	/* use wtbl spe idx */
+	mt76_wr(dev, MT_WTBL_ITDR1, MT_WTBL_SPE_IDX_SEL);
+	mt76_wr(dev, MT_WTBL_ITCR, ctrl);
+}
+
 static void
 mt7996_mac_decode_he_radiotap_ru(struct mt76_rx_status *status,
 				 struct ieee80211_radiotap_he *he,
@@ -985,7 +996,7 @@ void mt7996_mac_write_txwi(struct mt7996_dev *dev, __le32 *txwi,
 {
 	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
 	struct ieee80211_vif *vif = info->control.vif;
-	struct mt76_phy *mphy = &dev->mphy;
+	struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv;
 	u8 band_idx = (info->hw_queue & MT_TX_HW_QUEUE_PHY) >> 2;
 	u8 p_fmt, q_idx, omac_idx = 0, wmm_idx = 0;
 	bool is_8023 = info->flags & IEEE80211_TX_CTL_HW_80211_ENCAP;
@@ -997,15 +1008,11 @@ void mt7996_mac_write_txwi(struct mt7996_dev *dev, __le32 *txwi,
 					 BSS_CHANGED_FILS_DISCOVERY));
 
 	if (vif) {
-		struct mt7996_vif *mvif = (struct mt7996_vif *)vif->drv_priv;
-
 		omac_idx = mvif->mt76.omac_idx;
 		wmm_idx = mvif->mt76.wmm_idx;
 		band_idx = mvif->mt76.band_idx;
 	}
 
-	mphy = mt76_dev_phy(&dev->mt76, band_idx);
-
 	if (inband_disc) {
 		p_fmt = MT_TX_TYPE_FW;
 		q_idx = MT_LMAC_ALTX0;
@@ -1063,18 +1070,9 @@ void mt7996_mac_write_txwi(struct mt7996_dev *dev, __le32 *txwi,
 		mt7996_mac_write_txwi_80211(dev, txwi, skb, key);
 
 	if (txwi[1] & cpu_to_le32(MT_TXD1_FIXED_RATE)) {
-		/* Fixed rata is available just for 802.11 txd */
-		struct ieee80211_hdr *hdr = (struct ieee80211_hdr *)skb->data;
-		bool multicast = is_multicast_ether_addr(hdr->addr1);
-		u16 rate = mt76_connac2_mac_tx_rate_val(mphy, vif, beacon,
-							multicast);
-
-		/* fix to bw 20 */
-		val = MT_TXD6_FIXED_BW |
-		      FIELD_PREP(MT_TXD6_BW, 0) |
-		      FIELD_PREP(MT_TXD6_TX_RATE, rate);
-
-		txwi[6] |= cpu_to_le32(val);
+		u8 idx = mvif->basic_rates_idx;
+
+		txwi[6] |= FIELD_PREP(MT_TXD6_TX_RATE, idx);
 		txwi[3] |= cpu_to_le32(MT_TXD3_BA_DISABLE);
 	}
 }