mt76: add support for reporting tx status with skb

MT76x2/MT76x0 has somewhat unreliable tx status reporting, and for that
reason the driver currently does not report per-skb tx ack status at all.
This breaks things like client idle polling, which relies on the tx ack
status of a transmitted nullfunc frame.

This patch adds code to report skb-attached tx status if requested by
mac80211 or the rate control module. Since tx status is polled from a
simple FIFO register, the code needs to account for the possibility of
tx status events getting lost.

The code keeps a list of skbs for which tx status is required and passes
them to mac80211 once tx status has been filled in and the DMA queue is
done with it.
If a tx status event is not received after one second, the status rates
are cleared, and a succesful ACK is indicated to avoid spurious disassoc
during assoc or client polling.

Signed-off-by: Felix Fietkau <nbd@nbd.name>

1 files changed, 0 insertions, 19 deletions

diff --git a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h
index e2c47ca18d85..b076c4305585 100644
--- a/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h
+++ b/drivers/net/wireless/mediatek/mt76/mt76x02_mac.h
@@ -42,15 +42,6 @@ struct mt76x02_vif {
 	struct mt76_wcid group_wcid;
 };
 
-struct mt76x02_tx_info {
-	unsigned long jiffies;
-	u8 tries;
-
-	u8 wcid;
-	u8 pktid;
-	u8 retry;
-};
-
 DECLARE_EWMA(signal, 10, 8);
 
 struct mt76x02_sta {
@@ -153,8 +144,6 @@ enum mt76x2_phy_bandwidth {
 #define MT_TXWI_ACK_CTL_NSEQ		BIT(1)
 #define MT_TXWI_ACK_CTL_BA_WINDOW	GENMASK(7, 2)
 
-#define MT_TXWI_PKTID_PROBE		BIT(7)
-
 struct mt76x02_txwi {
 	__le16 flags;
 	__le16 rate;
@@ -190,14 +179,6 @@ static inline bool mt76x02_wait_for_mac(struct mt76_dev *dev)
 	return false;
 }
 
-static inline struct mt76x02_tx_info *
-mt76x02_skb_tx_info(struct sk_buff *skb)
-{
-	struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
-
-	return (void *)info->status.status_driver_data;
-}
-
 void mt76x02_txq_init(struct mt76x02_dev *dev, struct ieee80211_txq *txq);
 
 void mt76x02_mac_set_short_preamble(struct mt76x02_dev *dev, bool enable);