summaryrefslogtreecommitdiff
path: root/package/mac80211/patches/560-mac80211_defer_bar_tx.patch
blob: 9bf89183e827ff3089ff68fd0101594520d33858 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
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);
 			}
 		}