[PATCH ath-next] wifi: ath11k: report TX retries in station statistics

[Julius Bairaktaris]

ath11k does not fill NL80211_STA_INFO_TX_RETRIES, and mac80211's TX
status accounting leaves it at zero because the driver reports no
per-rate try counts. The HTT PPDU statistics carry the MPDUs tried and
acknowledged per user. Report the unacknowledged MPDUs per station as TX
retries and leave TX failures to mac80211. Over 6 runs of 30 s the
station's TX retries track the firmware's pdev mpdu_requeued counter to
within 57 MPDUs.

Tested-on: IPQ8074 hw2.0 AHB WLAN.HK.2.9.0.1-02146-QCAHKSWPL_SILICONZ-1

Assisted-by: Claude:claude-opus-5-5
Signed-off-by: Julius Bairaktaris <julius@xxxxxxxxxxxxxx>
---
 drivers/net/wireless/ath/ath11k/core.h  | 1 +
 drivers/net/wireless/ath/ath11k/dp_rx.c | 5 +++++
 drivers/net/wireless/ath/ath11k/mac.c   | 3 +++
 3 files changed, 9 insertions(+)

diff --git a/drivers/net/wireless/ath/ath11k/core.h b/drivers/net/wireless/ath/ath11k/core.h
index a0d725923e..f7ba888b61 100644
--- a/drivers/net/wireless/ath/ath11k/core.h
+++ b/drivers/net/wireless/ath/ath11k/core.h
@@ -556,6 +556,7 @@ struct ath11k_sta {
 	struct rate_info last_txrate;
 	u64 rx_duration;
 	u64 tx_duration;
+	u32 tx_retries;
 	u8 rssi_comb;
 	struct ewma_avg_rssi avg_rssi;
 	s8 rssi_beacon;
diff --git a/drivers/net/wireless/ath/ath11k/dp_rx.c b/drivers/net/wireless/ath/ath11k/dp_rx.c
index 6d95f7b343..726a9fc807 100644
--- a/drivers/net/wireless/ath/ath11k/dp_rx.c
+++ b/drivers/net/wireless/ath/ath11k/dp_rx.c
@@ -1454,6 +1454,11 @@ ath11k_update_per_peer_tx_stats(struct ath11k *ar,
 	sta = peer->sta;
 	arsta = ath11k_sta_to_arsta(sta);
 
+	if (usr_stats->cmpltn_cmn.mpdu_tried >
+	    usr_stats->cmpltn_cmn.mpdu_success)
+		arsta->tx_retries += usr_stats->cmpltn_cmn.mpdu_tried -
+				     usr_stats->cmpltn_cmn.mpdu_success;
+
 	memset(&arsta->txrate, 0, sizeof(arsta->txrate));
 
 	switch (flags) {
diff --git a/drivers/net/wireless/ath/ath11k/mac.c b/drivers/net/wireless/ath/ath11k/mac.c
index 1a237adaa3..066a503d76 100644
--- a/drivers/net/wireless/ath/ath11k/mac.c
+++ b/drivers/net/wireless/ath/ath11k/mac.c
@@ -9435,6 +9435,9 @@ static void ath11k_mac_op_sta_statistics(struct ieee80211_hw *hw,
 	sinfo->tx_duration = arsta->tx_duration;
 	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_DURATION);
 
+	sinfo->tx_retries = arsta->tx_retries;
+	sinfo->filled |= BIT_ULL(NL80211_STA_INFO_TX_RETRIES);
+
 	if (arsta->txrate.legacy || arsta->txrate.nss) {
 		if (arsta->txrate.legacy) {
 			sinfo->txrate.legacy = arsta->txrate.legacy;
-- 
2.53.0