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 int ___ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
129 enum ieee80211_back_parties initiator)
131 struct ieee80211_local *local = sta->local;
135 #ifdef CONFIG_MAC80211_HT_DEBUG
136 printk(KERN_DEBUG "Tx BA session stop requested for %pM tid %u\n",
138 #endif /* CONFIG_MAC80211_HT_DEBUG */
140 state = &sta->ampdu_mlme.tid_state_tx[tid];
142 if (*state == HT_AGG_STATE_OPERATIONAL)
143 sta->ampdu_mlme.addba_req_num[tid] = 0;
145 *state = HT_AGG_STATE_REQ_STOP_BA_MSK |
146 (initiator << HT_AGG_STATE_INITIATOR_SHIFT);
148 ret = drv_ampdu_action(local, sta->sdata,
149 IEEE80211_AMPDU_TX_STOP,
150 &sta->sta, tid, NULL);
152 /* HW shall not deny going back to legacy */
155 * We may have pending packets get stuck in this case...
156 * Not bothering with a workaround for now.
164 * After sending add Block Ack request we activated a timer until
165 * add Block Ack response will arrive from the recipient.
166 * If this timer expires sta_addba_resp_timer_expired will be executed.
168 static void sta_addba_resp_timer_expired(unsigned long data)
170 /* not an elegant detour, but there is no choice as the timer passes
171 * only one argument, and both sta_info and TID are needed, so init
172 * flow in sta_info_create gives the TID as data, while the timer_to_id
173 * array gives the sta through container_of */
174 u16 tid = *(u8 *)data;
175 struct sta_info *sta = container_of((void *)data,
176 struct sta_info, timer_to_tid[tid]);
179 state = &sta->ampdu_mlme.tid_state_tx[tid];
181 /* check if the TID waits for addBA response */
182 spin_lock_bh(&sta->lock);
183 if ((*state & (HT_ADDBA_REQUESTED_MSK | HT_ADDBA_RECEIVED_MSK |
184 HT_AGG_STATE_REQ_STOP_BA_MSK)) !=
185 HT_ADDBA_REQUESTED_MSK) {
186 spin_unlock_bh(&sta->lock);
187 *state = HT_AGG_STATE_IDLE;
188 #ifdef CONFIG_MAC80211_HT_DEBUG
189 printk(KERN_DEBUG "timer expired on tid %d but we are not "
190 "(or no longer) expecting addBA response there",
196 #ifdef CONFIG_MAC80211_HT_DEBUG
197 printk(KERN_DEBUG "addBA response timer expired on tid %d\n", tid);
200 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
201 spin_unlock_bh(&sta->lock);
204 static inline int ieee80211_ac_from_tid(int tid)
206 return ieee802_1d_to_ac[tid & 7];
209 int ieee80211_start_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid)
211 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
212 struct ieee80211_sub_if_data *sdata = sta->sdata;
213 struct ieee80211_local *local = sdata->local;
218 trace_api_start_tx_ba_session(pubsta, tid);
220 if (WARN_ON(!local->ops->ampdu_action))
223 if ((tid >= STA_TID_NUM) ||
224 !(local->hw.flags & IEEE80211_HW_AMPDU_AGGREGATION))
227 #ifdef CONFIG_MAC80211_HT_DEBUG
228 printk(KERN_DEBUG "Open BA session requested for %pM tid %u\n",
230 #endif /* CONFIG_MAC80211_HT_DEBUG */
233 * The aggregation code is not prepared to handle
234 * anything but STA/AP due to the BSSID handling.
235 * IBSS could work in the code but isn't supported
236 * by drivers or the standard.
238 if (sdata->vif.type != NL80211_IFTYPE_STATION &&
239 sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
240 sdata->vif.type != NL80211_IFTYPE_AP)
243 if (test_sta_flags(sta, WLAN_STA_DISASSOC)) {
244 #ifdef CONFIG_MAC80211_HT_DEBUG
245 printk(KERN_DEBUG "Disassociation is in progress. "
246 "Denying BA session request\n");
251 if (test_sta_flags(sta, WLAN_STA_BLOCK_BA)) {
252 #ifdef CONFIG_MAC80211_HT_DEBUG
253 printk(KERN_DEBUG "Suspend in progress. "
254 "Denying BA session request\n");
259 spin_lock_bh(&sta->lock);
260 spin_lock(&local->ampdu_lock);
262 /* we have tried too many times, receiver does not want A-MPDU */
263 if (sta->ampdu_mlme.addba_req_num[tid] > HT_AGG_MAX_RETRIES) {
268 state = &sta->ampdu_mlme.tid_state_tx[tid];
269 /* check if the TID is not in aggregation flow already */
270 if (*state != HT_AGG_STATE_IDLE) {
271 #ifdef CONFIG_MAC80211_HT_DEBUG
272 printk(KERN_DEBUG "BA request denied - session is not "
273 "idle on tid %u\n", tid);
274 #endif /* CONFIG_MAC80211_HT_DEBUG */
280 * While we're asking the driver about the aggregation,
281 * stop the AC queue so that we don't have to worry
282 * about frames that came in while we were doing that,
283 * which would require us to put them to the AC pending
284 * afterwards which just makes the code more complex.
286 ieee80211_stop_queue_by_reason(
287 &local->hw, ieee80211_ac_from_tid(tid),
288 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
290 /* prepare A-MPDU MLME for Tx aggregation */
291 sta->ampdu_mlme.tid_tx[tid] =
292 kmalloc(sizeof(struct tid_ampdu_tx), GFP_ATOMIC);
293 if (!sta->ampdu_mlme.tid_tx[tid]) {
294 #ifdef CONFIG_MAC80211_HT_DEBUG
296 printk(KERN_ERR "allocate tx mlme to tid %d failed\n",
303 skb_queue_head_init(&sta->ampdu_mlme.tid_tx[tid]->pending);
306 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.function =
307 sta_addba_resp_timer_expired;
308 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.data =
309 (unsigned long)&sta->timer_to_tid[tid];
310 init_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
312 /* Ok, the Addba frame hasn't been sent yet, but if the driver calls the
313 * call back right away, it must see that the flow has begun */
314 *state |= HT_ADDBA_REQUESTED_MSK;
316 start_seq_num = sta->tid_seq[tid] >> 4;
318 ret = drv_ampdu_action(local, sdata, IEEE80211_AMPDU_TX_START,
319 pubsta, tid, &start_seq_num);
322 #ifdef CONFIG_MAC80211_HT_DEBUG
323 printk(KERN_DEBUG "BA request denied - HW unavailable for"
325 #endif /* CONFIG_MAC80211_HT_DEBUG */
326 *state = HT_AGG_STATE_IDLE;
330 /* Driver vetoed or OKed, but we can take packets again now */
331 ieee80211_wake_queue_by_reason(
332 &local->hw, ieee80211_ac_from_tid(tid),
333 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
335 spin_unlock(&local->ampdu_lock);
336 spin_unlock_bh(&sta->lock);
338 /* send an addBA request */
339 sta->ampdu_mlme.dialog_token_allocator++;
340 sta->ampdu_mlme.tid_tx[tid]->dialog_token =
341 sta->ampdu_mlme.dialog_token_allocator;
342 sta->ampdu_mlme.tid_tx[tid]->ssn = start_seq_num;
344 ieee80211_send_addba_request(sdata, pubsta->addr, tid,
345 sta->ampdu_mlme.tid_tx[tid]->dialog_token,
346 sta->ampdu_mlme.tid_tx[tid]->ssn,
348 sta->ampdu_mlme.addba_req_num[tid]++;
349 /* activate the timer for the recipient's addBA response */
350 sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer.expires =
351 jiffies + ADDBA_RESP_INTERVAL;
352 add_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
353 #ifdef CONFIG_MAC80211_HT_DEBUG
354 printk(KERN_DEBUG "activated addBA response timer on tid %d\n", tid);
359 kfree(sta->ampdu_mlme.tid_tx[tid]);
360 sta->ampdu_mlme.tid_tx[tid] = NULL;
362 ieee80211_wake_queue_by_reason(
363 &local->hw, ieee80211_ac_from_tid(tid),
364 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
366 spin_unlock(&local->ampdu_lock);
367 spin_unlock_bh(&sta->lock);
370 EXPORT_SYMBOL(ieee80211_start_tx_ba_session);
373 * splice packets from the STA's pending to the local pending,
374 * requires a call to ieee80211_agg_splice_finish and holding
375 * local->ampdu_lock across both calls.
377 static void ieee80211_agg_splice_packets(struct ieee80211_local *local,
378 struct sta_info *sta, u16 tid)
381 u16 queue = ieee80211_ac_from_tid(tid);
383 ieee80211_stop_queue_by_reason(
385 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
387 if (!(sta->ampdu_mlme.tid_state_tx[tid] & HT_ADDBA_REQUESTED_MSK))
390 if (WARN(!sta->ampdu_mlme.tid_tx[tid],
391 "TID %d gone but expected when splicing aggregates from"
392 "the pending queue\n", tid))
395 if (!skb_queue_empty(&sta->ampdu_mlme.tid_tx[tid]->pending)) {
396 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
397 /* copy over remaining packets */
398 skb_queue_splice_tail_init(
399 &sta->ampdu_mlme.tid_tx[tid]->pending,
400 &local->pending[queue]);
401 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
405 static void ieee80211_agg_splice_finish(struct ieee80211_local *local,
406 struct sta_info *sta, u16 tid)
408 u16 queue = ieee80211_ac_from_tid(tid);
410 ieee80211_wake_queue_by_reason(
412 IEEE80211_QUEUE_STOP_REASON_AGGREGATION);
415 /* caller must hold sta->lock */
416 static void ieee80211_agg_tx_operational(struct ieee80211_local *local,
417 struct sta_info *sta, u16 tid)
419 #ifdef CONFIG_MAC80211_HT_DEBUG
420 printk(KERN_DEBUG "Aggregation is on for tid %d\n", tid);
423 spin_lock(&local->ampdu_lock);
424 ieee80211_agg_splice_packets(local, sta, tid);
426 * NB: we rely on sta->lock being taken in the TX
427 * processing here when adding to the pending queue,
428 * otherwise we could only change the state of the
429 * session to OPERATIONAL _here_.
431 ieee80211_agg_splice_finish(local, sta, tid);
432 spin_unlock(&local->ampdu_lock);
434 drv_ampdu_action(local, sta->sdata,
435 IEEE80211_AMPDU_TX_OPERATIONAL,
436 &sta->sta, tid, NULL);
439 void ieee80211_start_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u16 tid)
441 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
442 struct ieee80211_local *local = sdata->local;
443 struct sta_info *sta;
446 trace_api_start_tx_ba_cb(sdata, ra, tid);
448 if (tid >= STA_TID_NUM) {
449 #ifdef CONFIG_MAC80211_HT_DEBUG
450 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
457 sta = sta_info_get(sdata, ra);
460 #ifdef CONFIG_MAC80211_HT_DEBUG
461 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
466 state = &sta->ampdu_mlme.tid_state_tx[tid];
467 spin_lock_bh(&sta->lock);
469 if (WARN_ON(!(*state & HT_ADDBA_REQUESTED_MSK))) {
470 #ifdef CONFIG_MAC80211_HT_DEBUG
471 printk(KERN_DEBUG "addBA was not requested yet, state is %d\n",
474 spin_unlock_bh(&sta->lock);
479 if (WARN_ON(*state & HT_ADDBA_DRV_READY_MSK))
482 *state |= HT_ADDBA_DRV_READY_MSK;
484 if (*state == HT_AGG_STATE_OPERATIONAL)
485 ieee80211_agg_tx_operational(local, sta, tid);
488 spin_unlock_bh(&sta->lock);
491 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb);
493 void ieee80211_start_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
494 const u8 *ra, u16 tid)
496 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
497 struct ieee80211_local *local = sdata->local;
498 struct ieee80211_ra_tid *ra_tid;
499 struct sk_buff *skb = dev_alloc_skb(0);
501 if (unlikely(!skb)) {
502 #ifdef CONFIG_MAC80211_HT_DEBUG
504 printk(KERN_WARNING "%s: Not enough memory, "
505 "dropping start BA session", sdata->name);
509 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
510 memcpy(&ra_tid->ra, ra, ETH_ALEN);
514 skb->pkt_type = IEEE80211_ADDBA_MSG;
515 skb_queue_tail(&local->skb_queue, skb);
516 tasklet_schedule(&local->tasklet);
518 EXPORT_SYMBOL(ieee80211_start_tx_ba_cb_irqsafe);
520 int __ieee80211_stop_tx_ba_session(struct sta_info *sta, u16 tid,
521 enum ieee80211_back_parties initiator)
526 /* check if the TID is in aggregation */
527 state = &sta->ampdu_mlme.tid_state_tx[tid];
528 spin_lock_bh(&sta->lock);
530 if (*state != HT_AGG_STATE_OPERATIONAL) {
535 ret = ___ieee80211_stop_tx_ba_session(sta, tid, initiator);
538 spin_unlock_bh(&sta->lock);
542 int ieee80211_stop_tx_ba_session(struct ieee80211_sta *pubsta, u16 tid,
543 enum ieee80211_back_parties initiator)
545 struct sta_info *sta = container_of(pubsta, struct sta_info, sta);
546 struct ieee80211_sub_if_data *sdata = sta->sdata;
547 struct ieee80211_local *local = sdata->local;
549 trace_api_stop_tx_ba_session(pubsta, tid, initiator);
551 if (!local->ops->ampdu_action)
554 if (tid >= STA_TID_NUM)
557 return __ieee80211_stop_tx_ba_session(sta, tid, initiator);
559 EXPORT_SYMBOL(ieee80211_stop_tx_ba_session);
561 void ieee80211_stop_tx_ba_cb(struct ieee80211_vif *vif, u8 *ra, u8 tid)
563 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
564 struct ieee80211_local *local = sdata->local;
565 struct sta_info *sta;
568 trace_api_stop_tx_ba_cb(sdata, ra, tid);
570 if (tid >= STA_TID_NUM) {
571 #ifdef CONFIG_MAC80211_HT_DEBUG
572 printk(KERN_DEBUG "Bad TID value: tid = %d (>= %d)\n",
578 #ifdef CONFIG_MAC80211_HT_DEBUG
579 printk(KERN_DEBUG "Stopping Tx BA session for %pM tid %d\n",
581 #endif /* CONFIG_MAC80211_HT_DEBUG */
584 sta = sta_info_get(sdata, ra);
586 #ifdef CONFIG_MAC80211_HT_DEBUG
587 printk(KERN_DEBUG "Could not find station: %pM\n", ra);
592 state = &sta->ampdu_mlme.tid_state_tx[tid];
594 /* NOTE: no need to use sta->lock in this state check, as
595 * ieee80211_stop_tx_ba_session will let only one stop call to
596 * pass through per sta/tid
598 if ((*state & HT_AGG_STATE_REQ_STOP_BA_MSK) == 0) {
599 #ifdef CONFIG_MAC80211_HT_DEBUG
600 printk(KERN_DEBUG "unexpected callback to A-MPDU stop\n");
606 if (*state & HT_AGG_STATE_INITIATOR_MSK)
607 ieee80211_send_delba(sta->sdata, ra, tid,
608 WLAN_BACK_INITIATOR, WLAN_REASON_QSTA_NOT_USE);
610 spin_lock_bh(&sta->lock);
611 spin_lock(&local->ampdu_lock);
613 ieee80211_agg_splice_packets(local, sta, tid);
615 *state = HT_AGG_STATE_IDLE;
616 /* from now on packets are no longer put onto sta->pending */
617 kfree(sta->ampdu_mlme.tid_tx[tid]);
618 sta->ampdu_mlme.tid_tx[tid] = NULL;
620 ieee80211_agg_splice_finish(local, sta, tid);
622 spin_unlock(&local->ampdu_lock);
623 spin_unlock_bh(&sta->lock);
627 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb);
629 void ieee80211_stop_tx_ba_cb_irqsafe(struct ieee80211_vif *vif,
630 const u8 *ra, u16 tid)
632 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
633 struct ieee80211_local *local = sdata->local;
634 struct ieee80211_ra_tid *ra_tid;
635 struct sk_buff *skb = dev_alloc_skb(0);
637 if (unlikely(!skb)) {
638 #ifdef CONFIG_MAC80211_HT_DEBUG
640 printk(KERN_WARNING "%s: Not enough memory, "
641 "dropping stop BA session", sdata->name);
645 ra_tid = (struct ieee80211_ra_tid *) &skb->cb;
646 memcpy(&ra_tid->ra, ra, ETH_ALEN);
650 skb->pkt_type = IEEE80211_DELBA_MSG;
651 skb_queue_tail(&local->skb_queue, skb);
652 tasklet_schedule(&local->tasklet);
654 EXPORT_SYMBOL(ieee80211_stop_tx_ba_cb_irqsafe);
657 void ieee80211_process_addba_resp(struct ieee80211_local *local,
658 struct sta_info *sta,
659 struct ieee80211_mgmt *mgmt,
665 capab = le16_to_cpu(mgmt->u.action.u.addba_resp.capab);
666 tid = (capab & IEEE80211_ADDBA_PARAM_TID_MASK) >> 2;
668 state = &sta->ampdu_mlme.tid_state_tx[tid];
670 spin_lock_bh(&sta->lock);
672 if (!(*state & HT_ADDBA_REQUESTED_MSK))
675 if (mgmt->u.action.u.addba_resp.dialog_token !=
676 sta->ampdu_mlme.tid_tx[tid]->dialog_token) {
677 #ifdef CONFIG_MAC80211_HT_DEBUG
678 printk(KERN_DEBUG "wrong addBA response token, tid %d\n", tid);
679 #endif /* CONFIG_MAC80211_HT_DEBUG */
683 del_timer(&sta->ampdu_mlme.tid_tx[tid]->addba_resp_timer);
685 #ifdef CONFIG_MAC80211_HT_DEBUG
686 printk(KERN_DEBUG "switched off addBA timer for tid %d\n", tid);
687 #endif /* CONFIG_MAC80211_HT_DEBUG */
689 if (le16_to_cpu(mgmt->u.action.u.addba_resp.status)
690 == WLAN_STATUS_SUCCESS) {
691 u8 curstate = *state;
693 *state |= HT_ADDBA_RECEIVED_MSK;
695 if (*state != curstate && *state == HT_AGG_STATE_OPERATIONAL)
696 ieee80211_agg_tx_operational(local, sta, tid);
698 sta->ampdu_mlme.addba_req_num[tid] = 0;
700 ___ieee80211_stop_tx_ba_session(sta, tid, WLAN_BACK_INITIATOR);
704 spin_unlock_bh(&sta->lock);