From 1f08de0a7e31ae97537b5db55a32016883ec09ad Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sun, 27 Feb 2011 21:46:15 +0000
Subject: mac80211: improve ath9k AP A-MPDU PS buffering

SVN-Revision: 25779
---
 .../patches/530-mac80211_drv_tim_override.patch    | 48 +++++++++++++++++++---
 .../patches/540-mac80211_add_rx_rate.patch         |  4 +-
 2 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/package/mac80211/patches/530-mac80211_drv_tim_override.patch b/package/mac80211/patches/530-mac80211_drv_tim_override.patch
index 96e5ea3245..198f658a61 100644
--- a/package/mac80211/patches/530-mac80211_drv_tim_override.patch
+++ b/package/mac80211/patches/530-mac80211_drv_tim_override.patch
@@ -1,6 +1,6 @@
 --- a/include/net/mac80211.h
 +++ b/include/net/mac80211.h
-@@ -2209,6 +2209,20 @@ static inline int ieee80211_sta_ps_trans
+@@ -2209,6 +2209,18 @@ static inline int ieee80211_sta_ps_trans
  #define IEEE80211_TX_STATUS_HEADROOM	13
  
  /**
@@ -10,10 +10,8 @@
 + * them back to mac80211 for retransmission, the station needs to be told
 + * to wake up using the TIM bitmap in the beacon.
 + *
-+ * This function sets the station's TIM bit - it will be cleared automatically
-+ * either when the station wakes up (and mac80211 has flushed out its
-+ * buffered frames), or if all remaining buffered frames in mac80211 have
-+ * timed out.
++ * This function sets the station's TIM bit - it will be cleared when the
++ * station wakes up.
 + */
 +void ieee80211_sta_set_tim(struct ieee80211_sta *sta);
 +
@@ -23,7 +21,25 @@
   * Call this function for all transmitted frames after they have been
 --- a/net/mac80211/sta_info.c
 +++ b/net/mac80211/sta_info.c
-@@ -991,3 +991,11 @@ void ieee80211_sta_block_awake(struct ie
+@@ -608,7 +608,8 @@ static bool sta_info_cleanup_expire_buff
+ #endif
+ 		dev_kfree_skb(skb);
+ 
+-		if (skb_queue_empty(&sta->ps_tx_buf))
++		if (skb_queue_empty(&sta->ps_tx_buf) &&
++		    !test_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF))
+ 			sta_info_clear_tim_bit(sta);
+ 	}
+ 
+@@ -899,6 +900,7 @@ void ieee80211_sta_ps_deliver_wakeup(str
+ 	struct ieee80211_local *local = sdata->local;
+ 	int sent, buffered;
+ 
++	clear_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF);
+ 	if (!(local->hw.flags & IEEE80211_HW_AP_LINK_PS))
+ 		drv_sta_notify(local, sdata, STA_NOTIFY_AWAKE, &sta->sta);
+ 
+@@ -991,3 +993,12 @@ void ieee80211_sta_block_awake(struct ie
  		ieee80211_queue_work(hw, &sta->drv_unblock_wk);
  }
  EXPORT_SYMBOL(ieee80211_sta_block_awake);
@@ -32,6 +48,26 @@
 +{
 +	struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
 +
++	set_sta_flags(sta, WLAN_STA_PS_DRIVER_BUF);
 +	sta_info_set_tim_bit(sta);
 +}
 +EXPORT_SYMBOL(ieee80211_sta_set_tim);
+--- a/net/mac80211/sta_info.h
++++ b/net/mac80211/sta_info.h
+@@ -43,6 +43,8 @@
+  *	be in the queues
+  * @WLAN_STA_PSPOLL: Station sent PS-poll while driver was keeping
+  *	station in power-save mode, reply when the driver unblocks.
++ * @WLAN_STA_PS_DRIVER_BUF: Station has frames pending in driver internal
++ *	buffers. Automatically cleared on station wake-up.
+  */
+ enum ieee80211_sta_info_flags {
+ 	WLAN_STA_AUTH		= 1<<0,
+@@ -58,6 +60,7 @@ enum ieee80211_sta_info_flags {
+ 	WLAN_STA_BLOCK_BA	= 1<<11,
+ 	WLAN_STA_PS_DRIVER	= 1<<12,
+ 	WLAN_STA_PSPOLL		= 1<<13,
++	WLAN_STA_PS_DRIVER_BUF	= 1<<14,
+ };
+ 
+ #define STA_TID_NUM 16
diff --git a/package/mac80211/patches/540-mac80211_add_rx_rate.patch b/package/mac80211/patches/540-mac80211_add_rx_rate.patch
index 137e6d19e7..d365f35245 100644
--- a/package/mac80211/patches/540-mac80211_add_rx_rate.patch
+++ b/package/mac80211/patches/540-mac80211_add_rx_rate.patch
@@ -132,7 +132,7 @@
  		NLA_PUT_U32(msg, NL80211_STA_INFO_RX_PACKETS,
 --- a/net/mac80211/sta_info.h
 +++ b/net/mac80211/sta_info.h
-@@ -209,6 +209,8 @@ enum plink_state {
+@@ -212,6 +212,8 @@ enum plink_state {
   * @rate_ctrl_priv: rate control private per-STA pointer
   * @last_tx_rate: rate used for last transmit, to report to userspace as
   *	"the" transmit rate
@@ -141,7 +141,7 @@
   * @lock: used for locking all fields that require locking, see comments
   *	in the header file.
   * @flaglock: spinlock for flags accesses
-@@ -311,6 +313,8 @@ struct sta_info {
+@@ -314,6 +316,8 @@ struct sta_info {
  	unsigned long tx_bytes;
  	unsigned long tx_fragments;
  	struct ieee80211_tx_rate last_tx_rate;
-- 
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