mac80211: add ieee80211_tx_status_noskb

This can be used by drivers that cannot reliably map tx status
information onto specific skbs.

Signed-off-by: Felix Fietkau <nbd@openwrt.org>
Signed-off-by: Johannes Berg <johannes.berg@intel.com>

3 files changed, 92 insertions, 0 deletions

diff --git a/include/net/mac80211.h b/include/net/mac80211.h
index 01dfd22e45fd..58d719ddaa60 100644
--- a/include/net/mac80211.h
+++ b/include/net/mac80211.h
@@ -3619,6 +3619,26 @@ void ieee80211_tx_status(struct ieee80211_hw *hw,
                          struct sk_buff *skb);
 
 /**
+ * ieee80211_tx_status_noskb - transmit status callback without skb
+ *
+ * This function can be used as a replacement for ieee80211_tx_status
+ * in drivers that cannot reliably map tx status information back to
+ * specific skbs.
+ *
+ * Calls to this function for a single hardware must be synchronized
+ * against each other. Calls to this function, ieee80211_tx_status_ni()
+ * and ieee80211_tx_status_irqsafe() may not be mixed for a single hardware.
+ *
+ * @hw: the hardware the frame was transmitted by
+ * @sta: the receiver station to which this packet is sent
+ *      (NULL for multicast packets)
+ * @info: tx status information
+ */
+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
+                               struct ieee80211_sta *sta,
+                               struct ieee80211_tx_info *info);
+
+/**
  * ieee80211_tx_status_ni - transmit status callback (in process context)
  *
  * Like ieee80211_tx_status() but can be called in process context.
diff --git a/net/mac80211/rate.h b/net/mac80211/rate.h
index dd25964a300a..38652f09feaf 100644
--- a/net/mac80211/rate.h
+++ b/net/mac80211/rate.h
@@ -48,6 +48,24 @@ static inline void rate_control_tx_status(struct ieee80211_local *local,
                 ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
 }
 
+static inline void
+rate_control_tx_status_noskb(struct ieee80211_local *local,
+                             struct ieee80211_supported_band *sband,
+                             struct sta_info *sta,
+                             struct ieee80211_tx_info *info)
+{
+        struct rate_control_ref *ref = local->rate_ctrl;
+        struct ieee80211_sta *ista = &sta->sta;
+        void *priv_sta = sta->rate_ctrl_priv;
+
+        if (!ref || !test_sta_flag(sta, WLAN_STA_RATE_CONTROL))
+                return;
+
+        if (WARN_ON_ONCE(!ref->ops->tx_status_noskb))
+                return;
+
+        ref->ops->tx_status_noskb(ref->priv, sband, ista, priv_sta, info);
+}
 
 static inline void rate_control_rate_init(struct sta_info *sta)
 {
diff --git a/net/mac80211/status.c b/net/mac80211/status.c
index fee9c5ee51ae..bb146f377ee4 100644
--- a/net/mac80211/status.c
+++ b/net/mac80211/status.c
@@ -656,6 +656,60 @@ static int ieee80211_tx_get_rates(struct ieee80211_hw *hw,
         return rates_idx;
 }
 
+void ieee80211_tx_status_noskb(struct ieee80211_hw *hw,
+                               struct ieee80211_sta *pubsta,
+                               struct ieee80211_tx_info *info)
+{
+        struct ieee80211_local *local = hw_to_local(hw);
+        struct ieee80211_supported_band *sband;
+        int retry_count;
+        int rates_idx;
+        bool acked;
+
+        rates_idx = ieee80211_tx_get_rates(hw, info, &retry_count);
+
+        sband = hw->wiphy->bands[info->band];
+
+        acked = !!(info->flags & IEEE80211_TX_STAT_ACK);
+        if (pubsta) {
+                struct sta_info *sta;
+
+                sta = container_of(pubsta, struct sta_info, sta);
+
+                if (!acked)
+                        sta->tx_retry_failed++;
+                sta->tx_retry_count += retry_count;
+
+                if (acked) {
+                        sta->last_rx = jiffies;
+
+                        if (sta->lost_packets)
+                                sta->lost_packets = 0;
+
+                        /* Track when last TDLS packet was ACKed */
+                        if (test_sta_flag(sta, WLAN_STA_TDLS_PEER_AUTH))
+                                sta->last_tdls_pkt_time = jiffies;
+                } else {
+                        ieee80211_lost_packet(sta, info);
+                }
+
+                rate_control_tx_status_noskb(local, sband, sta, info);
+        }
+
+        if (acked) {
+                    local->dot11TransmittedFrameCount++;
+                    if (!pubsta)
+                            local->dot11MulticastTransmittedFrameCount++;
+                    if (retry_count > 0)
+                            local->dot11RetryCount++;
+                    if (retry_count > 1)
+                            local->dot11MultipleRetryCount++;
+        } else {
+                local->dot11FailedCount++;
+        }
+}
+EXPORT_SYMBOL(ieee80211_tx_status_noskb);
+
 void ieee80211_tx_status(struct ieee80211_hw *hw, struct sk_buff *skb)
 {
         struct sk_buff *skb2;