From 6c57c577116b3c885b07f797e701b3b13fbf4895 Mon Sep 17 00:00:00 2001
From: Felix Fietkau <nbd@openwrt.org>
Date: Sat, 27 Aug 2011 21:57:07 +0000
Subject: mac80211: update to wireless-testing 2011-08-26

git-svn-id: svn://svn.openwrt.org/openwrt/trunk@28093 3c298f89-4303-0410-b956-a3cf2f4a3e73
---
 .../patches/560-mac80211_defer_bar_tx.patch        | 90 ++++++++++++++++++++++
 1 file changed, 90 insertions(+)
 create mode 100644 package/mac80211/patches/560-mac80211_defer_bar_tx.patch

(limited to 'package/mac80211/patches/560-mac80211_defer_bar_tx.patch')

diff --git a/package/mac80211/patches/560-mac80211_defer_bar_tx.patch b/package/mac80211/patches/560-mac80211_defer_bar_tx.patch
new file mode 100644
index 0000000000..9bf89183e8
--- /dev/null
+++ b/package/mac80211/patches/560-mac80211_defer_bar_tx.patch
@@ -0,0 +1,90 @@
+--- a/net/mac80211/sta_info.h
++++ b/net/mac80211/sta_info.h
+@@ -84,6 +84,8 @@ enum ieee80211_sta_info_flags {
+  * @stop_initiator: initiator of a session stop
+  * @tx_stop: TX DelBA frame when stopping
+  * @buf_size: reorder buffer size at receiver
++ * @failed_bar_ssn: ssn of the last failed BAR tx attempt
++ * @bar_pending: BAR needs to be re-sent
+  *
+  * This structure's lifetime is managed by RCU, assignments to
+  * the array holding it must hold the aggregation mutex.
+@@ -104,6 +106,9 @@ struct tid_ampdu_tx {
+ 	u8 stop_initiator;
+ 	bool tx_stop;
+ 	u8 buf_size;
++
++	u16 failed_bar_ssn;
++	bool bar_pending;
+ };
+ 
+ /**
+--- a/net/mac80211/status.c
++++ b/net/mac80211/status.c
+@@ -127,12 +127,32 @@ static void ieee80211_handle_filtered_fr
+ 	dev_kfree_skb(skb);
+ }
+ 
++static void ieee80211_check_pending_bar(struct sta_info *sta, u8 *addr, u8 tid)
++{
++	struct tid_ampdu_tx *tid_tx;
++
++	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
++	if (!tid_tx || !tid_tx->bar_pending)
++		return;
++
++	tid_tx->bar_pending = false;
++	ieee80211_send_bar(sta->sdata, addr, tid, tid_tx->failed_bar_ssn);
++}
++
+ static void ieee80211_frame_acked(struct sta_info *sta, struct sk_buff *skb)
+ {
+ 	struct ieee80211_mgmt *mgmt = (void *) skb->data;
+ 	struct ieee80211_local *local = sta->local;
+ 	struct ieee80211_sub_if_data *sdata = sta->sdata;
+ 
++	if (ieee80211_is_data_qos(mgmt->frame_control)) {
++		struct ieee80211_hdr *hdr = (void *) skb->data;
++		u8 *qc = ieee80211_get_qos_ctl(hdr);
++		u16 tid = qc[0] & 0xf;
++
++		ieee80211_check_pending_bar(sta, hdr->addr1, tid);
++	}
++
+ 	if (ieee80211_is_action(mgmt->frame_control) &&
+ 	    sdata->vif.type == NL80211_IFTYPE_STATION &&
+ 	    mgmt->u.action.category == WLAN_CATEGORY_HT &&
+@@ -161,6 +181,18 @@ static void ieee80211_frame_acked(struct
+ 	}
+ }
+ 
++static void ieee80211_set_bar_pending(struct sta_info *sta, u8 tid, u16 ssn)
++{
++	struct tid_ampdu_tx *tid_tx;
++
++	tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
++	if (!tid_tx)
++		return;
++
++	tid_tx->failed_bar_ssn = ssn;
++	tid_tx->bar_pending = true;
++}
++
+ /*
+  * Use a static threshold for now, best value to be determined
+  * by testing ...
+@@ -254,10 +286,13 @@ void ieee80211_tx_status(struct ieee8021
+ 			 */
+ 			bar = (struct ieee80211_bar *) skb->data;
+ 			if (!(bar->control & IEEE80211_BAR_CTRL_MULTI_TID)) {
++				u16 ssn = le16_to_cpu(bar->start_seq_num);
++
+ 				tid = (bar->control &
+ 				       IEEE80211_BAR_CTRL_TID_INFO_MASK) >>
+ 				      IEEE80211_BAR_CTRL_TID_INFO_SHIFT;
+-				ieee80211_stop_tx_ba_session(&sta->sta, tid);
++
++				ieee80211_set_bar_pending(sta, tid, ssn);
+ 			}
+ 		}
+ 
-- 
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