@@ -123,6 +123,7 @@ struct ath10k_skb_cb {
u8 flags;
u8 eid;
u16 msdu_id;
+ u16 airtime_est;
struct ieee80211_vif *vif;
struct ieee80211_txq *txq;
} __packed;
@@ -493,6 +494,7 @@ struct ath10k_sta {
u32 smps;
u16 peer_id;
struct rate_info txrate;
+ u32 last_tx_bitrate;
struct work_struct update_wk;
u64 rx_duration;
@@ -2809,6 +2809,7 @@ static inline int ath10k_get_legacy_rate_idx(struct ath10k *ar, u8 rate)
arsta->txrate.nss = txrate.nss;
arsta->txrate.bw = ath10k_bw_to_mac80211_bw(txrate.bw);
+ arsta->last_tx_bitrate = cfg80211_calculate_bitrate(&arsta->txrate);
if (ath10k_debug_is_extd_tx_stats_enabled(ar))
ath10k_accumulate_per_peer_tx_stats(ar, arsta, peer_stats,
@@ -3528,7 +3528,7 @@ static void ath10k_tx_h_add_p2p_noa_ie(struct ath10k *ar,
static void ath10k_mac_tx_h_fill_cb(struct ath10k *ar,
struct ieee80211_vif *vif,
struct ieee80211_txq *txq,
- struct sk_buff *skb)
+ struct sk_buff *skb, u16 airtime)
{
struct ieee80211_hdr *hdr = (void *)skb->data;
struct ath10k_skb_cb *cb = ATH10K_SKB_CB(skb);
@@ -3545,6 +3545,7 @@ static void ath10k_mac_tx_h_fill_cb(struct ath10k *ar,
cb->vif = vif;
cb->txq = txq;
+ cb->airtime_est = airtime;
}
bool ath10k_mac_tx_frm_has_freq(struct ath10k *ar)
@@ -3932,6 +3933,49 @@ static bool ath10k_mac_tx_can_push(struct ieee80211_hw *hw,
return false;
}
+/* Return estimated airtime in microsecond, which is calculated using last
+ * reported TX rate. This is just a rough estimation because host driver has no
+ * knowledge of the actual transmit rate, retries or aggregation. If actual
+ * airtime can be reported by firmware, then delta between estimated and actual
+ * airtime can be adjusted from deficit.
+ */
+#define IEEE80211_ATF_OVERHEAD 100 /* IFS + some slot time */
+#define IEEE80211_ATF_OVERHEAD_IFS 16 /* IFS only */
+static u16 ath10k_mac_update_airtime(struct ath10k *ar,
+ struct ieee80211_txq *txq,
+ struct sk_buff *skb)
+{
+ struct ath10k_sta *arsta;
+ u32 pktlen;
+ u16 airtime = 0;
+
+ if (!txq || !txq->sta)
+ return airtime;
+
+ spin_lock_bh(&ar->data_lock);
+ arsta = (struct ath10k_sta *)txq->sta->drv_priv;
+
+ pktlen = skb->len + 38; /* Assume MAC header 30, SNAP 8 for most case */
+ if (arsta->last_tx_bitrate) {
+ /* airtime in us, last_tx_bitrate in 100kbps */
+ airtime = (pktlen * 8 * (1000 / 100))
+ / arsta->last_tx_bitrate;
+ /* overhead for media access time and IFS */
+ airtime += IEEE80211_ATF_OVERHEAD_IFS;
+ } else {
+ /* This is mostly for throttle excessive BC/MC frames, and the
+ * airtime/rate doesn't need be exact. Airtime of BC/MC frames
+ * in 2G get some discount, which helps prevent very low rate
+ * frames from being blocked for too long.
+ */
+ airtime = (pktlen * 8 * (1000 / 100)) / 60; /* 6M */
+ airtime += IEEE80211_ATF_OVERHEAD;
+ }
+ spin_unlock_bh(&ar->data_lock);
+
+ return airtime;
+}
+
int ath10k_mac_tx_push_txq(struct ieee80211_hw *hw,
struct ieee80211_txq *txq)
{
@@ -3947,6 +3991,7 @@ int ath10k_mac_tx_push_txq(struct ieee80211_hw *hw,
size_t skb_len;
bool is_mgmt, is_presp;
int ret;
+ u16 airtime;
spin_lock_bh(&ar->htt.tx_lock);
ret = ath10k_htt_tx_inc_pending(htt);
@@ -3964,7 +4009,8 @@ int ath10k_mac_tx_push_txq(struct ieee80211_hw *hw,
return -ENOENT;
}
- ath10k_mac_tx_h_fill_cb(ar, vif, txq, skb);
+ airtime = ath10k_mac_update_airtime(ar, txq, skb);
+ ath10k_mac_tx_h_fill_cb(ar, vif, txq, skb, airtime);
skb_len = skb->len;
txmode = ath10k_mac_tx_h_get_txmode(ar, vif, sta, skb);
@@ -4230,8 +4276,10 @@ static void ath10k_mac_op_tx(struct ieee80211_hw *hw,
bool is_mgmt;
bool is_presp;
int ret;
+ u16 airtime;
- ath10k_mac_tx_h_fill_cb(ar, vif, txq, skb);
+ airtime = ath10k_mac_update_airtime(ar, txq, skb);
+ ath10k_mac_tx_h_fill_cb(ar, vif, txq, skb, airtime);
txmode = ath10k_mac_tx_h_get_txmode(ar, vif, sta, skb);
txpath = ath10k_mac_tx_h_get_txpath(ar, skb, txmode);
@@ -8465,6 +8513,9 @@ int ath10k_mac_register(struct ath10k *ar)
wiphy_ext_feature_set(ar->hw->wiphy,
NL80211_EXT_FEATURE_DATA_ACK_SIGNAL_SUPPORT);
+ if (ath10k_peer_stats_enabled(ar))
+ wiphy_ext_feature_set(ar->hw->wiphy,
+ NL80211_EXT_FEATURE_AIRTIME_FAIRNESS);
/*
* on LL hardware queues are managed entirely by the FW
* so we only advertise to mac we can do the queues thing
@@ -95,6 +95,10 @@ int ath10k_txrx_tx_unref(struct ath10k_htt *htt,
wake_up(&htt->empty_tx_wq);
spin_unlock_bh(&htt->tx_lock);
+ if (txq && txq->sta)
+ ieee80211_sta_register_airtime(txq->sta, txq->tid,
+ skb_cb->airtime_est, 0);
+
if (ar->dev_type != ATH10K_DEV_TYPE_HL)
dma_unmap_single(dev, skb_cb->paddr, msdu->len, DMA_TO_DEVICE);