4 * Copyright 2003, Jouni Malinen <jkmaline@cc.hut.fi>
5 * Copyright 2002-2005, Instant802 Networks, Inc.
6 * Copyright 2005-2006, Devicescape Software, Inc.
7 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
8 * Copyright 2007, Michael Wu <flamingice@sourmilk.net>
9 * Copyright 2007-2009, Intel Corporation
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License version 2 as
13 * published by the Free Software Foundation.
16 #include <linux/ieee80211.h>
17 #include <linux/slab.h>
18 #include <net/mac80211.h>
19 #include "ieee80211_i.h"
20 #include "driver-ops.h"
26 * Aggregation on the TX side requires setting the hardware flag
27 * %IEEE80211_HW_AMPDU_AGGREGATION as well as, if present, the @ampdu_queues
28 * hardware parameter to the number of hardware AMPDU queues. If there are no
29 * hardware queues then the driver will (currently) have to do all frame
32 * When TX aggregation is started by some subsystem (usually the rate control
33 * algorithm would be appropriate) by calling the
34 * ieee80211_start_tx_ba_session() function, the driver will be notified via
35 * its @ampdu_action function, with the %IEEE80211_AMPDU_TX_START action.
37 * In response to that, the driver is later required to call the
38 * ieee80211_start_tx_ba_cb() (or ieee80211_start_tx_ba_cb_irqsafe())
39 * function, which will start the aggregation session.
41 * Similarly, when the aggregation session is stopped by
42 * ieee80211_stop_tx_ba_session(), the driver's @ampdu_action function will
43 * be called with the action %IEEE80211_AMPDU_TX_STOP. In this case, the
44 * call must not fail, and the driver must later call ieee80211_stop_tx_ba_cb()
45 * (or ieee80211_stop_tx_ba_cb_irqsafe()).
48 static void ieee80211_send_addba_request(struct ieee80211_sub_if_data *sdata,
49 const u8 *da, u16 tid,
50 u8 dialog_token, u16 start_seq_num,
51 u16 agg_size, u16 timeout)
53 struct ieee80211_local *local = sdata->local;
55 struct ieee80211_mgmt *mgmt;
58 skb = dev_alloc_skb(sizeof(*mgmt) + local->hw.extra_tx_headroom);
61 printk(KERN_ERR "%s: failed to allocate buffer "
62 "for addba request frame\n", sdata->name);
65 skb_reserve(skb, local->hw.extra_tx_headroom);
66 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24);
68 memcpy(mgmt->da, da, ETH_ALEN);
69 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
70 if (sdata->vif.type == NL80211_IFTYPE_AP ||
71 sdata->vif.type == NL80211_IFTYPE_AP_VLAN)
72 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
73 else if (sdata->vif.type == NL80211_IFTYPE_STATION)
74 memcpy(mgmt->bssid, sdata->u.mgd.bssid, ETH_ALEN);
76 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
77 IEEE80211_STYPE_ACTION);
79 skb_put(skb, 1 + sizeof(mgmt->u.action.u.addba_req));
81 mgmt->u.action.category = WLAN_CATEGORY_BACK;
82 mgmt->u.action.u.addba_req.action_code = WLAN_ACTION_ADDBA_REQ;
84 mgmt->u.action.u.addba_req.dialog_token = dialog_token;
85 capab = (u16)(1 << 1); /* bit 1 aggregation policy */
86 capab |= (u16)(tid << 2); /* bit 5:2 TID number */
87 capab |= (u16)(agg_size << 6); /* bit 15:6 max size of aggergation */
89 mgmt->u.action.u.addba_req.capab = cpu_to_le16(capab);
91 mgmt->u.action.u.addba_req.timeout = cpu_to_le16(timeout);
92 mgmt->u.action.u.addba_req.start_seq_num =
93 cpu_to_le16(start_seq_num << 4);
95 ieee80211_tx_skb(sdata, skb);
98 void ieee80211_send_bar(struct ieee80211_sub_if_data *sdata, u8 *ra, u16 tid, u16 ssn)
100 struct ieee80211_local *local = sdata->local;
102 struct ieee80211_bar *bar;
105 skb = dev_alloc_skb(sizeof(*bar) + local->hw.extra_tx_headroom);
107 printk(KERN_ERR "%s: failed to allocate buffer for "
108 "bar frame\n", sdata->name);
111 skb_reserve(skb, local->hw.extra_tx_headroom);
112 bar = (struct ieee80211_bar *)skb_put(skb, sizeof(*bar));
113 memset(bar, 0, sizeof(*bar));
114 bar->frame_control = cpu_to_le16(IEEE80211_FTYPE_CTL |
115 IEEE80211_STYPE_BACK_REQ);
116 memcpy(bar->ra, ra, ETH_ALEN);
117 memcpy(bar->ta, sdata->vif.addr, ETH_ALEN);
118 bar_control |= (u16)IEEE80211_BAR_CTRL_ACK_POLICY_NORMAL;
119 bar_control |= (u16)IEEE80211_BAR_CTRL_CBMTID_COMPRESSED_BA;
120 bar_control |= (u16)(tid << 12);
121 bar->control = cpu_to_le16(bar_control);
122 bar->start_seq_num = cpu_to_le16(ssn);
124 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
125 ieee80211_tx_skb(sdata, skb);
128 static void kfree_tid_tx(struct rcu_head *rcu_head)
130 struct tid_ampdu_tx *tid_tx =
131 container_of(rcu_head, struct tid_ampdu_tx, rcu_head);
136 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
137 enum ieee80211_back_parties initiator)
139 struct ieee80211_local *local = sta->local;
140 struct tid_ampdu_tx *tid_tx = sta->ampdu_mlme.tid_tx[tid];
143 lockdep_assert_held(&sta->lock);
145 if (WARN_ON(!tid_tx))
148 if (test_bit(HT_AGG_STATE_WANT_START, &tid_tx->state)) {
149 /* not even started yet! */
150 rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], NULL);
151 call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
155 #ifdef CONFIG_MAC80211_HT_DEBUG
156 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
158 #endif /* CONFIG_MAC80211_HT_DEBUG */
160 set_bit(HT_AGG_STATE_STOPPING, &tid_tx->state);
163 * After this packets are no longer handed right through
164 * to the driver but are put onto tid_tx->pending instead,
165 * with locking to ensure proper access.
167 clear_bit(HT_AGG_STATE_OPERATIONAL, &tid_tx->state);
169 tid_tx->stop_initiator = initiator;
171 ret = drv_ampdu_action(local, sta->sdata,
172 IEEE80211_AMPDU_TX_STOP,
173 &sta->sta, tid, NULL);
175 /* HW shall not deny going back to legacy */
178 * We may have pending packets get stuck in this case...
179 * Not bothering with a workaround for now.
187 * After sending add Block Ack request we activated a timer until
188 * add Block Ack response will arrive from the recipient.
189 * If this timer expires sta_addba_resp_timer_expired will be executed.
191 static void sta_addba_resp_timer_expired(unsigned long data)
193 /* not an elegant detour, but there is no choice as the timer passes
194 * only one argument, and both sta_info and TID are needed, so init
195 * flow in sta_info_create gives the TID as data, while the timer_to_id
196 * array gives the sta through container_of */
197 u16 tid = *(u8 *)data;
198 struct sta_info *sta = container_of((void *)data,
199 struct sta_info, timer_to_tid[tid]);
200 struct tid_ampdu_tx *tid_tx;
202 /* check if the TID waits for addBA response */
204 tid_tx = rcu_dereference(sta->ampdu_mlme.tid_tx[tid]);
206 test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state)) {
208 #ifdef CONFIG_MAC80211_HT_DEBUG
209 printk(KERN_DEBUG "timer expired on tid %d but we are not "
210 "(or no longer) expecting addBA response there\n",
216 #ifdef CONFIG_MAC80211_HT_DEBUG
217 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
220 ieee80211_stop_tx_ba_session(&sta->sta, tid);
224 static inline int ieee80211_ac_from_tid(int tid)
226 return ieee802_1d_to_ac[tid & 7];
230 * When multiple aggregation sessions on multiple stations
231 * are being created/destroyed simultaneously, we need to
232 * refcount the global queue stop caused by that in order
233 * to not get into a situation where one of the aggregation
234 * setup or teardown re-enables queues before the other is
235 * ready to handle that.
237 * These two functions take care of this issue by keeping
238 * a global "agg_queue_stop" refcount.
240 static void __acquires(agg_queue)
241 ieee80211_stop_queue_agg(struct ieee80211_local *local, int tid)
243 int queue = ieee80211_ac_from_tid(tid);
245 if (atomic_inc_return(&local->agg_queue_stop[queue]) == 1)
246 ieee80211_stop_queue_by_reason(
248 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
249 __acquire(agg_queue);
252 static void __releases(agg_queue)
253 ieee80211_wake_queue_agg(struct ieee80211_local *local, int tid)
255 int queue = ieee80211_ac_from_tid(tid);
257 if (atomic_dec_return(&local->agg_queue_stop[queue]) == 0)
258 ieee80211_wake_queue_by_reason(
260 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
261 __release(agg_queue);
264 void ieee80211_tx_ba_session_handle_start(struct sta_info *sta, int tid)
266 struct tid_ampdu_tx *tid_tx = sta->ampdu_mlme.tid_tx[tid];
267 struct ieee80211_local *local = sta->local;
268 struct ieee80211_sub_if_data *sdata = sta->sdata;
273 * While we're asking the driver about the aggregation,
274 * stop the AC queue so that we don't have to worry
275 * about frames that came in while we were doing that,
276 * which would require us to put them to the AC pending
277 * afterwards which just makes the code more complex.
279 ieee80211_stop_queue_agg(local, tid);
281 clear_bit(HT_AGG_STATE_WANT_START, &tid_tx->state);
284 * This might be off by one due to a race that we can't
285 * really prevent here without synchronize_net() which
286 * can't be called now.
288 start_seq_num = sta->tid_seq[tid] >> 4;
290 ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
291 &sta->sta, tid, &start_seq_num);
293 #ifdef CONFIG_MAC80211_HT_DEBUG
294 printk(KERN_DEBUG "BA request denied - HW unavailable for"
297 rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], NULL);
298 ieee80211_wake_queue_agg(local, tid);
299 call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
303 /* we can take packets again now */
304 ieee80211_wake_queue_agg(local, tid);
306 /* activate the timer for the recipient's addBA response */
307 mod_timer(&tid_tx->addba_resp_timer, jiffies + ADDBA_RESP_INTERVAL);
308 #ifdef CONFIG_MAC80211_HT_DEBUG
309 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
312 sta->ampdu_mlme.addba_req_num[tid]++;
314 /* send AddBA request */
315 ieee80211_send_addba_request(sdata, sta->sta.addr, tid,
316 tid_tx->dialog_token, start_seq_num,
320 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
322 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
323 struct ieee80211_sub_if_data *sdata = sta->sdata;
324 struct ieee80211_local *local = sdata->local;
325 struct tid_ampdu_tx *tid_tx;
328 trace_api_start_tx_ba_session(pubsta, tid);
330 if (WARN_ON(!local->ops->ampdu_action))
333 if ((tid >= STA_TID_NUM) ||
334 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
337 #ifdef CONFIG_MAC80211_HT_DEBUG
338 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
340 #endif /* CONFIG_MAC80211_HT_DEBUG */
343 * The aggregation code is not prepared to handle
344 * anything but STA/AP due to the BSSID handling.
345 * IBSS could work in the code but isn't supported
346 * by drivers or the standard.
348 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
349 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
350 sdata->vif.type != NL80211_IFTYPE_AP)
353 if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
354 #ifdef CONFIG_MAC80211_HT_DEBUG
355 printk(KERN_DEBUG "BA sessions blocked. "
356 "Denying BA session request\n");
361 spin_lock_bh(&sta->lock);
363 /* we have tried too many times, receiver does not want A-MPDU */
364 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
369 tid_tx = sta->ampdu_mlme.tid_tx[tid];
370 /* check if the TID is not in aggregation flow already */
372 #ifdef CONFIG_MAC80211_HT_DEBUG
373 printk(KERN_DEBUG "BA request denied - session is not "
374 "idle on tid %u\n", tid);
375 #endif /* CONFIG_MAC80211_HT_DEBUG */
380 /* prepare A-MPDU MLME for Tx aggregation */
381 tid_tx = kzalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
383 #ifdef CONFIG_MAC80211_HT_DEBUG
385 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
392 skb_queue_head_init(&tid_tx->pending);
393 __set_bit(HT_AGG_STATE_WANT_START, &tid_tx->state);
396 tid_tx->addba_resp_timer.function = sta_addba_resp_timer_expired;
397 tid_tx->addba_resp_timer.data = (unsigned long)&sta->timer_to_tid[tid];
398 init_timer(&tid_tx->addba_resp_timer);
400 /* assign a dialog token */
401 sta->ampdu_mlme.dialog_token_allocator++;
402 tid_tx->dialog_token = sta->ampdu_mlme.dialog_token_allocator;
404 /* finally, assign it to the array */
405 rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], tid_tx);
407 ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
409 /* this flow continues off the work */
411 spin_unlock_bh(&sta->lock);
414 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
417 * splice packets from the STA's pending to the local pending,
418 * requires a call to ieee80211_agg_splice_finish later
420 static void __acquires(agg_queue)
421 ieee80211_agg_splice_packets(struct ieee80211_local *local,
422 struct tid_ampdu_tx *tid_tx, u16 tid)
424 int queue = ieee80211_ac_from_tid(tid);
427 ieee80211_stop_queue_agg(local, tid);
429 if (WARN(!tid_tx, "TID %d gone but expected when splicing aggregates"
430 " from the pending queue\n", tid))
433 if (!skb_queue_empty(&tid_tx->pending)) {
434 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
435 /* copy over remaining packets */
436 skb_queue_splice_tail_init(&tid_tx->pending,
437 &local->pending[queue]);
438 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
442 static void __releases(agg_queue)
443 ieee80211_agg_splice_finish(struct ieee80211_local *local, u16 tid)
445 ieee80211_wake_queue_agg(local, tid);
448 /* caller must hold sta->lock */
449 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
450 struct sta_info *sta, u16 tid)
452 lockdep_assert_held(&sta->lock);
454 #ifdef CONFIG_MAC80211_HT_DEBUG
455 printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
458 ieee80211_agg_splice_packets(local, sta->ampdu_mlme.tid_tx[tid], tid);
460 * Now mark as operational. This will be visible
461 * in the TX path, and lets it go lock-free in
464 set_bit(HT_AGG_STATE_OPERATIONAL, &sta->ampdu_mlme.tid_tx[tid]->state);
465 ieee80211_agg_splice_finish(local, tid);
467 drv_ampdu_action(local, sta->sdata,
468 IEEE80211_AMPDU_TX_OPERATIONAL,
469 &sta->sta, tid, NULL);
472 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
474 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
475 struct ieee80211_local *local = sdata->local;
476 struct sta_info *sta;
477 struct tid_ampdu_tx *tid_tx;
479 trace_api_start_tx_ba_cb(sdata, ra, tid);
481 if (tid >= STA_TID_NUM) {
482 #ifdef CONFIG_MAC80211_HT_DEBUG
483 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
490 sta = sta_info_get(sdata, ra);
493 #ifdef CONFIG_MAC80211_HT_DEBUG
494 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
499 spin_lock_bh(&sta->lock);
500 tid_tx = sta->ampdu_mlme.tid_tx[tid];
502 if (WARN_ON(!tid_tx)) {
503 #ifdef CONFIG_MAC80211_HT_DEBUG
504 printk(KERN_DEBUG "addBA was not requested!\n");
506 spin_unlock_bh(&sta->lock);
511 if (WARN_ON(test_and_set_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state)))
514 if (test_bit(HT_AGG_STATE_RESPONSE_RECEIVED, &tid_tx->state))
515 ieee80211_agg_tx_operational(local, sta, tid);
518 spin_unlock_bh(&sta->lock);
522 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
523 const u8 *ra, u16 tid)
525 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
526 struct ieee80211_local *local = sdata->local;
527 struct ieee80211_ra_tid *ra_tid;
528 struct sk_buff *skb = dev_alloc_skb(0);
530 if (unlikely(!skb)) {
531 #ifdef CONFIG_MAC80211_HT_DEBUG
533 printk(KERN_WARNING "%s: Not enough memory, "
534 "dropping start BA session", sdata->name);
538 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
539 memcpy(&ra_tid->ra, ra, ETH_ALEN);
542 skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_START;
543 skb_queue_tail(&sdata->skb_queue, skb);
544 ieee80211_queue_work(&local->hw, &sdata->work);
546 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
548 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
549 enum ieee80211_back_parties initiator)
551 struct tid_ampdu_tx *tid_tx;
554 spin_lock_bh(&sta->lock);
555 tid_tx = sta->ampdu_mlme.tid_tx[tid];
562 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
565 spin_unlock_bh(&sta->lock);
569 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
571 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
572 struct ieee80211_sub_if_data *sdata = sta->sdata;
573 struct ieee80211_local *local = sdata->local;
574 struct tid_ampdu_tx *tid_tx;
577 trace_api_stop_tx_ba_session(pubsta, tid);
579 if (!local->ops->ampdu_action)
582 if (tid >= STA_TID_NUM)
585 spin_lock_bh(&sta->lock);
586 tid_tx = sta->ampdu_mlme.tid_tx[tid];
593 if (test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
594 /* already in progress stopping it */
599 set_bit(HT_AGG_STATE_WANT_STOP, &tid_tx->state);
600 ieee80211_queue_work(&local->hw, &sta->ampdu_mlme.work);
603 spin_unlock_bh(&sta->lock);
606 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
608 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
610 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
611 struct ieee80211_local *local = sdata->local;
612 struct sta_info *sta;
613 struct tid_ampdu_tx *tid_tx;
615 trace_api_stop_tx_ba_cb(sdata, ra, tid);
617 if (tid >= STA_TID_NUM) {
618 #ifdef CONFIG_MAC80211_HT_DEBUG
619 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
625 #ifdef CONFIG_MAC80211_HT_DEBUG
626 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
628 #endif /* CONFIG_MAC80211_HT_DEBUG */
631 sta = sta_info_get(sdata, ra);
633 #ifdef CONFIG_MAC80211_HT_DEBUG
634 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
640 spin_lock_bh(&sta->lock);
641 tid_tx = sta->ampdu_mlme.tid_tx[tid];
643 if (!tid_tx || !test_bit(HT_AGG_STATE_STOPPING, &tid_tx->state)) {
644 #ifdef CONFIG_MAC80211_HT_DEBUG
645 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
647 spin_unlock_bh(&sta->lock);
652 if (tid_tx->stop_initiator == WLAN_BACK_INITIATOR)
653 ieee80211_send_delba(sta->sdata, ra, tid,
654 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
657 * When we get here, the TX path will not be lockless any more wrt.
658 * aggregation, since the OPERATIONAL bit has long been cleared.
659 * Thus it will block on getting the lock, if it occurs. So if we
660 * stop the queue now, we will not get any more packets, and any
661 * that might be being processed will wait for us here, thereby
662 * guaranteeing that no packets go to the tid_tx pending queue any
666 ieee80211_agg_splice_packets(local, tid_tx, tid);
668 /* future packets must not find the tid_tx struct any more */
669 rcu_assign_pointer(sta->ampdu_mlme.tid_tx[tid], NULL);
671 ieee80211_agg_splice_finish(local, tid);
673 call_rcu(&tid_tx->rcu_head, kfree_tid_tx);
675 spin_unlock_bh(&sta->lock);
679 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
680 const u8 *ra, u16 tid)
682 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
683 struct ieee80211_local *local = sdata->local;
684 struct ieee80211_ra_tid *ra_tid;
685 struct sk_buff *skb = dev_alloc_skb(0);
687 if (unlikely(!skb)) {
688 #ifdef CONFIG_MAC80211_HT_DEBUG
690 printk(KERN_WARNING "%s: Not enough memory, "
691 "dropping stop BA session", sdata->name);
695 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
696 memcpy(&ra_tid->ra, ra, ETH_ALEN);
699 skb->pkt_type = IEEE80211_SDATA_QUEUE_AGG_STOP;
700 skb_queue_tail(&sdata->skb_queue, skb);
701 ieee80211_queue_work(&local->hw, &sdata->work);
703 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
706 void ieee80211_process_addba_resp(struct ieee80211_local *local,
707 struct sta_info *sta,
708 struct ieee80211_mgmt *mgmt,
711 struct tid_ampdu_tx *tid_tx;
714 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
715 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
717 spin_lock_bh(&sta->lock);
719 tid_tx = sta->ampdu_mlme.tid_tx[tid];
724 if (mgmt->u.action.u.addba_resp.dialog_token != tid_tx->dialog_token) {
725 #ifdef CONFIG_MAC80211_HT_DEBUG
726 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
731 del_timer(&tid_tx->addba_resp_timer);
733 #ifdef CONFIG_MAC80211_HT_DEBUG
734 printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid);
737 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
738 == WLAN_STATUS_SUCCESS) {
739 if (test_and_set_bit(HT_AGG_STATE_RESPONSE_RECEIVED,
741 /* ignore duplicate response */
745 if (test_bit(HT_AGG_STATE_DRV_READY, &tid_tx->state))
746 ieee80211_agg_tx_operational(local, sta, tid);
748 sta->ampdu_mlme.addba_req_num[tid] = 0;
750 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
754 spin_unlock_bh(&sta->lock);