1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2020 Intel Corporation
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 struct ieee80211_local *local;
43 local = wiphy_priv(wiphy);
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
51 struct ieee80211_hdr *hdr;
53 skb_queue_walk(&tx->skbs, skb) {
54 hdr = (struct ieee80211_hdr *) skb->data;
55 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
59 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
60 int rate, int erp, int short_preamble,
65 /* calculate duration (in microseconds, rounded up to next higher
66 * integer if it includes a fractional microsecond) to send frame of
67 * len bytes (does not include FCS) at the given rate. Duration will
70 * rate is in 100 kbps, so divident is multiplied by 10 in the
71 * DIV_ROUND_UP() operations.
73 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
74 * is assumed to be 0 otherwise.
77 if (band == NL80211_BAND_5GHZ || erp) {
81 * N_DBPS = DATARATE x 4
82 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
83 * (16 = SIGNAL time, 6 = tail bits)
84 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
87 * 802.11a - 18.5.2: aSIFSTime = 16 usec
88 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
91 dur = 16; /* SIFS + signal ext */
92 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
93 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
95 /* IEEE 802.11-2012 18.3.2.4: all values above are:
97 * * times 2 for 10 MHz
101 /* rates should already consider the channel bandwidth,
102 * don't apply divisor again.
104 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
105 4 * rate); /* T_SYM x N_SYM */
108 * 802.11b or 802.11g with 802.11b compatibility:
109 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
110 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
112 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
113 * aSIFSTime = 10 usec
114 * aPreambleLength = 144 usec or 72 usec with short preamble
115 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
117 dur = 10; /* aSIFSTime = 10 usec */
118 dur += short_preamble ? (72 + 24) : (144 + 48);
120 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
126 /* Exported duration function for driver use */
127 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
128 struct ieee80211_vif *vif,
129 enum nl80211_band band,
131 struct ieee80211_rate *rate)
133 struct ieee80211_sub_if_data *sdata;
136 bool short_preamble = false;
140 sdata = vif_to_sdata(vif);
141 short_preamble = sdata->vif.bss_conf.use_short_preamble;
142 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
143 erp = rate->flags & IEEE80211_RATE_ERP_G;
144 shift = ieee80211_vif_get_shift(vif);
147 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
148 short_preamble, shift);
150 return cpu_to_le16(dur);
152 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
154 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
155 struct ieee80211_vif *vif, size_t frame_len,
156 const struct ieee80211_tx_info *frame_txctl)
158 struct ieee80211_local *local = hw_to_local(hw);
159 struct ieee80211_rate *rate;
160 struct ieee80211_sub_if_data *sdata;
162 int erp, shift = 0, bitrate;
164 struct ieee80211_supported_band *sband;
166 sband = local->hw.wiphy->bands[frame_txctl->band];
168 short_preamble = false;
170 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
174 sdata = vif_to_sdata(vif);
175 short_preamble = sdata->vif.bss_conf.use_short_preamble;
176 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
177 erp = rate->flags & IEEE80211_RATE_ERP_G;
178 shift = ieee80211_vif_get_shift(vif);
181 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
184 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
185 erp, short_preamble, shift);
186 /* Data frame duration */
187 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
188 erp, short_preamble, shift);
190 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
191 erp, short_preamble, shift);
193 return cpu_to_le16(dur);
195 EXPORT_SYMBOL(ieee80211_rts_duration);
197 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
198 struct ieee80211_vif *vif,
200 const struct ieee80211_tx_info *frame_txctl)
202 struct ieee80211_local *local = hw_to_local(hw);
203 struct ieee80211_rate *rate;
204 struct ieee80211_sub_if_data *sdata;
206 int erp, shift = 0, bitrate;
208 struct ieee80211_supported_band *sband;
210 sband = local->hw.wiphy->bands[frame_txctl->band];
212 short_preamble = false;
214 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
217 sdata = vif_to_sdata(vif);
218 short_preamble = sdata->vif.bss_conf.use_short_preamble;
219 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
220 erp = rate->flags & IEEE80211_RATE_ERP_G;
221 shift = ieee80211_vif_get_shift(vif);
224 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
226 /* Data frame duration */
227 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
228 erp, short_preamble, shift);
229 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
231 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
232 erp, short_preamble, shift);
235 return cpu_to_le16(dur);
237 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
239 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
241 struct ieee80211_local *local = sdata->local;
242 struct ieee80211_vif *vif = &sdata->vif;
243 struct fq *fq = &local->fq;
244 struct ps_data *ps = NULL;
245 struct txq_info *txqi;
246 struct sta_info *sta;
250 spin_lock(&fq->lock);
252 if (sdata->vif.type == NL80211_IFTYPE_AP)
253 ps = &sdata->bss->ps;
255 sdata->vif.txqs_stopped[ac] = false;
257 list_for_each_entry_rcu(sta, &local->sta_list, list) {
258 if (sdata != sta->sdata)
261 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
262 struct ieee80211_txq *txq = sta->sta.txq[i];
267 txqi = to_txq_info(txq);
272 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
276 spin_unlock(&fq->lock);
277 drv_wake_tx_queue(local, txqi);
278 spin_lock(&fq->lock);
285 txqi = to_txq_info(vif->txq);
287 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
288 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
291 spin_unlock(&fq->lock);
293 drv_wake_tx_queue(local, txqi);
297 spin_unlock(&fq->lock);
302 __releases(&local->queue_stop_reason_lock)
303 __acquires(&local->queue_stop_reason_lock)
304 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
306 struct ieee80211_sub_if_data *sdata;
307 int n_acs = IEEE80211_NUM_ACS;
312 if (local->hw.queues < IEEE80211_NUM_ACS)
315 for (i = 0; i < local->hw.queues; i++) {
316 if (local->queue_stop_reasons[i])
319 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
320 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
323 for (ac = 0; ac < n_acs; ac++) {
324 int ac_queue = sdata->vif.hw_queue[ac];
327 sdata->vif.cab_queue == i)
328 __ieee80211_wake_txqs(sdata, ac);
331 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
337 void ieee80211_wake_txqs(unsigned long data)
339 struct ieee80211_local *local = (struct ieee80211_local *)data;
342 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
343 _ieee80211_wake_txqs(local, &flags);
344 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
347 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
349 struct ieee80211_sub_if_data *sdata;
350 int n_acs = IEEE80211_NUM_ACS;
352 if (local->ops->wake_tx_queue)
355 if (local->hw.queues < IEEE80211_NUM_ACS)
358 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
364 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
365 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
368 for (ac = 0; ac < n_acs; ac++) {
369 int ac_queue = sdata->vif.hw_queue[ac];
371 if (ac_queue == queue ||
372 (sdata->vif.cab_queue == queue &&
373 local->queue_stop_reasons[ac_queue] == 0 &&
374 skb_queue_empty(&local->pending[ac_queue])))
375 netif_wake_subqueue(sdata->dev, ac);
380 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
381 enum queue_stop_reason reason,
383 unsigned long *flags)
385 struct ieee80211_local *local = hw_to_local(hw);
387 trace_wake_queue(local, queue, reason);
389 if (WARN_ON(queue >= hw->queues))
392 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
396 local->q_stop_reasons[queue][reason] = 0;
398 local->q_stop_reasons[queue][reason]--;
399 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
400 local->q_stop_reasons[queue][reason] = 0;
403 if (local->q_stop_reasons[queue][reason] == 0)
404 __clear_bit(reason, &local->queue_stop_reasons[queue]);
406 if (local->queue_stop_reasons[queue] != 0)
407 /* someone still has this queue stopped */
410 if (skb_queue_empty(&local->pending[queue])) {
412 ieee80211_propagate_queue_wake(local, queue);
415 tasklet_schedule(&local->tx_pending_tasklet);
418 * Calling _ieee80211_wake_txqs here can be a problem because it may
419 * release queue_stop_reason_lock which has been taken by
420 * __ieee80211_wake_queue's caller. It is certainly not very nice to
421 * release someone's lock, but it is fine because all the callers of
422 * __ieee80211_wake_queue call it right before releasing the lock.
424 if (local->ops->wake_tx_queue) {
425 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
426 tasklet_schedule(&local->wake_txqs_tasklet);
428 _ieee80211_wake_txqs(local, flags);
432 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
433 enum queue_stop_reason reason,
436 struct ieee80211_local *local = hw_to_local(hw);
439 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
440 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
441 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
444 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
446 ieee80211_wake_queue_by_reason(hw, queue,
447 IEEE80211_QUEUE_STOP_REASON_DRIVER,
450 EXPORT_SYMBOL(ieee80211_wake_queue);
452 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
453 enum queue_stop_reason reason,
456 struct ieee80211_local *local = hw_to_local(hw);
457 struct ieee80211_sub_if_data *sdata;
458 int n_acs = IEEE80211_NUM_ACS;
460 trace_stop_queue(local, queue, reason);
462 if (WARN_ON(queue >= hw->queues))
466 local->q_stop_reasons[queue][reason] = 1;
468 local->q_stop_reasons[queue][reason]++;
470 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
473 if (local->hw.queues < IEEE80211_NUM_ACS)
477 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
483 for (ac = 0; ac < n_acs; ac++) {
484 if (sdata->vif.hw_queue[ac] == queue ||
485 sdata->vif.cab_queue == queue) {
486 if (!local->ops->wake_tx_queue) {
487 netif_stop_subqueue(sdata->dev, ac);
490 spin_lock(&local->fq.lock);
491 sdata->vif.txqs_stopped[ac] = true;
492 spin_unlock(&local->fq.lock);
499 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
500 enum queue_stop_reason reason,
503 struct ieee80211_local *local = hw_to_local(hw);
506 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
507 __ieee80211_stop_queue(hw, queue, reason, refcounted);
508 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
511 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
513 ieee80211_stop_queue_by_reason(hw, queue,
514 IEEE80211_QUEUE_STOP_REASON_DRIVER,
517 EXPORT_SYMBOL(ieee80211_stop_queue);
519 void ieee80211_add_pending_skb(struct ieee80211_local *local,
522 struct ieee80211_hw *hw = &local->hw;
524 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
525 int queue = info->hw_queue;
527 if (WARN_ON(!info->control.vif)) {
528 ieee80211_free_txskb(&local->hw, skb);
532 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
533 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
535 __skb_queue_tail(&local->pending[queue], skb);
536 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
538 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
541 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
542 struct sk_buff_head *skbs)
544 struct ieee80211_hw *hw = &local->hw;
549 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
550 while ((skb = skb_dequeue(skbs))) {
551 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
553 if (WARN_ON(!info->control.vif)) {
554 ieee80211_free_txskb(&local->hw, skb);
558 queue = info->hw_queue;
560 __ieee80211_stop_queue(hw, queue,
561 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
564 __skb_queue_tail(&local->pending[queue], skb);
567 for (i = 0; i < hw->queues; i++)
568 __ieee80211_wake_queue(hw, i,
569 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
571 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
574 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
575 unsigned long queues,
576 enum queue_stop_reason reason,
579 struct ieee80211_local *local = hw_to_local(hw);
583 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
585 for_each_set_bit(i, &queues, hw->queues)
586 __ieee80211_stop_queue(hw, i, reason, refcounted);
588 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
591 void ieee80211_stop_queues(struct ieee80211_hw *hw)
593 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
594 IEEE80211_QUEUE_STOP_REASON_DRIVER,
597 EXPORT_SYMBOL(ieee80211_stop_queues);
599 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
601 struct ieee80211_local *local = hw_to_local(hw);
605 if (WARN_ON(queue >= hw->queues))
608 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
609 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
610 &local->queue_stop_reasons[queue]);
611 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
614 EXPORT_SYMBOL(ieee80211_queue_stopped);
616 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
617 unsigned long queues,
618 enum queue_stop_reason reason,
621 struct ieee80211_local *local = hw_to_local(hw);
625 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
627 for_each_set_bit(i, &queues, hw->queues)
628 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
630 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
633 void ieee80211_wake_queues(struct ieee80211_hw *hw)
635 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
636 IEEE80211_QUEUE_STOP_REASON_DRIVER,
639 EXPORT_SYMBOL(ieee80211_wake_queues);
642 ieee80211_get_vif_queues(struct ieee80211_local *local,
643 struct ieee80211_sub_if_data *sdata)
647 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
652 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
653 queues |= BIT(sdata->vif.hw_queue[ac]);
654 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
655 queues |= BIT(sdata->vif.cab_queue);
658 queues = BIT(local->hw.queues) - 1;
664 void __ieee80211_flush_queues(struct ieee80211_local *local,
665 struct ieee80211_sub_if_data *sdata,
666 unsigned int queues, bool drop)
668 if (!local->ops->flush)
672 * If no queue was set, or if the HW doesn't support
673 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
675 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
676 queues = ieee80211_get_vif_queues(local, sdata);
678 ieee80211_stop_queues_by_reason(&local->hw, queues,
679 IEEE80211_QUEUE_STOP_REASON_FLUSH,
682 drv_flush(local, sdata, queues, drop);
684 ieee80211_wake_queues_by_reason(&local->hw, queues,
685 IEEE80211_QUEUE_STOP_REASON_FLUSH,
689 void ieee80211_flush_queues(struct ieee80211_local *local,
690 struct ieee80211_sub_if_data *sdata, bool drop)
692 __ieee80211_flush_queues(local, sdata, 0, drop);
695 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
696 struct ieee80211_sub_if_data *sdata,
697 enum queue_stop_reason reason)
699 ieee80211_stop_queues_by_reason(&local->hw,
700 ieee80211_get_vif_queues(local, sdata),
704 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
705 struct ieee80211_sub_if_data *sdata,
706 enum queue_stop_reason reason)
708 ieee80211_wake_queues_by_reason(&local->hw,
709 ieee80211_get_vif_queues(local, sdata),
713 static void __iterate_interfaces(struct ieee80211_local *local,
715 void (*iterator)(void *data, u8 *mac,
716 struct ieee80211_vif *vif),
719 struct ieee80211_sub_if_data *sdata;
720 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
722 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
723 switch (sdata->vif.type) {
724 case NL80211_IFTYPE_MONITOR:
725 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
728 case NL80211_IFTYPE_AP_VLAN:
733 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
734 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
736 if (ieee80211_sdata_running(sdata) || !active_only)
737 iterator(data, sdata->vif.addr,
741 sdata = rcu_dereference_check(local->monitor_sdata,
742 lockdep_is_held(&local->iflist_mtx) ||
743 lockdep_rtnl_is_held());
745 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
746 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
747 iterator(data, sdata->vif.addr, &sdata->vif);
750 void ieee80211_iterate_interfaces(
751 struct ieee80211_hw *hw, u32 iter_flags,
752 void (*iterator)(void *data, u8 *mac,
753 struct ieee80211_vif *vif),
756 struct ieee80211_local *local = hw_to_local(hw);
758 mutex_lock(&local->iflist_mtx);
759 __iterate_interfaces(local, iter_flags, iterator, data);
760 mutex_unlock(&local->iflist_mtx);
762 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
764 void ieee80211_iterate_active_interfaces_atomic(
765 struct ieee80211_hw *hw, u32 iter_flags,
766 void (*iterator)(void *data, u8 *mac,
767 struct ieee80211_vif *vif),
770 struct ieee80211_local *local = hw_to_local(hw);
773 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
777 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
779 void ieee80211_iterate_active_interfaces_rtnl(
780 struct ieee80211_hw *hw, u32 iter_flags,
781 void (*iterator)(void *data, u8 *mac,
782 struct ieee80211_vif *vif),
785 struct ieee80211_local *local = hw_to_local(hw);
789 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
792 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
794 static void __iterate_stations(struct ieee80211_local *local,
795 void (*iterator)(void *data,
796 struct ieee80211_sta *sta),
799 struct sta_info *sta;
801 list_for_each_entry_rcu(sta, &local->sta_list, list) {
805 iterator(data, &sta->sta);
809 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
810 void (*iterator)(void *data,
811 struct ieee80211_sta *sta),
814 struct ieee80211_local *local = hw_to_local(hw);
817 __iterate_stations(local, iterator, data);
820 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
822 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
824 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
826 if (!ieee80211_sdata_running(sdata) ||
827 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
831 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
833 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
835 struct ieee80211_sub_if_data *sdata;
840 sdata = vif_to_sdata(vif);
842 if (!ieee80211_sdata_running(sdata) ||
843 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
848 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
851 * Nothing should have been stuffed into the workqueue during
852 * the suspend->resume cycle. Since we can't check each caller
853 * of this function if we are already quiescing / suspended,
854 * check here and don't WARN since this can actually happen when
855 * the rx path (for example) is racing against __ieee80211_suspend
856 * and suspending / quiescing was set after the rx path checked
859 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
861 if (local->quiescing || (local->suspended && !local->resuming)) {
862 pr_warn("queueing ieee80211 work while going to suspend\n");
869 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
871 struct ieee80211_local *local = hw_to_local(hw);
873 if (!ieee80211_can_queue_work(local))
876 queue_work(local->workqueue, work);
878 EXPORT_SYMBOL(ieee80211_queue_work);
880 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
881 struct delayed_work *dwork,
884 struct ieee80211_local *local = hw_to_local(hw);
886 if (!ieee80211_can_queue_work(local))
889 queue_delayed_work(local->workqueue, dwork, delay);
891 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
893 static void ieee80211_parse_extension_element(u32 *crc,
894 const struct element *elem,
895 struct ieee802_11_elems *elems)
897 const void *data = elem->data + 1;
898 u8 len = elem->datalen - 1;
900 switch (elem->data[0]) {
901 case WLAN_EID_EXT_HE_MU_EDCA:
902 if (len == sizeof(*elems->mu_edca_param_set)) {
903 elems->mu_edca_param_set = data;
905 *crc = crc32_be(*crc, (void *)elem,
909 case WLAN_EID_EXT_HE_CAPABILITY:
910 elems->he_cap = data;
911 elems->he_cap_len = len;
913 case WLAN_EID_EXT_HE_OPERATION:
914 if (len >= sizeof(*elems->he_operation) &&
915 len == ieee80211_he_oper_size(data) - 1)
916 elems->he_operation = data;
918 case WLAN_EID_EXT_UORA:
920 elems->uora_element = data;
922 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
924 elems->max_channel_switch_time = data;
926 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
927 if (len == sizeof(*elems->mbssid_config_ie))
928 elems->mbssid_config_ie = data;
930 case WLAN_EID_EXT_HE_SPR:
931 if (len >= sizeof(*elems->he_spr) &&
932 len >= ieee80211_he_spr_size(data))
933 elems->he_spr = data;
939 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
940 struct ieee802_11_elems *elems,
942 const struct element *check_inherit)
944 const struct element *elem;
945 bool calc_crc = filter != 0;
946 DECLARE_BITMAP(seen_elems, 256);
949 bitmap_zero(seen_elems, 256);
951 for_each_element(elem, start, len) {
952 bool elem_parse_failed;
954 u8 elen = elem->datalen;
955 const u8 *pos = elem->data;
958 !cfg80211_is_element_inherited(elem,
964 case WLAN_EID_SUPP_RATES:
965 case WLAN_EID_FH_PARAMS:
966 case WLAN_EID_DS_PARAMS:
967 case WLAN_EID_CF_PARAMS:
969 case WLAN_EID_IBSS_PARAMS:
970 case WLAN_EID_CHALLENGE:
972 case WLAN_EID_ERP_INFO:
973 case WLAN_EID_EXT_SUPP_RATES:
974 case WLAN_EID_HT_CAPABILITY:
975 case WLAN_EID_HT_OPERATION:
976 case WLAN_EID_VHT_CAPABILITY:
977 case WLAN_EID_VHT_OPERATION:
978 case WLAN_EID_MESH_ID:
979 case WLAN_EID_MESH_CONFIG:
980 case WLAN_EID_PEER_MGMT:
985 case WLAN_EID_CHANNEL_SWITCH:
986 case WLAN_EID_EXT_CHANSWITCH_ANN:
987 case WLAN_EID_COUNTRY:
988 case WLAN_EID_PWR_CONSTRAINT:
989 case WLAN_EID_TIMEOUT_INTERVAL:
990 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
991 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
992 case WLAN_EID_CHAN_SWITCH_PARAM:
993 case WLAN_EID_EXT_CAPABILITY:
994 case WLAN_EID_CHAN_SWITCH_TIMING:
995 case WLAN_EID_LINK_ID:
996 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
999 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1000 * that if the content gets bigger it might be needed more than once
1002 if (test_bit(id, seen_elems)) {
1003 elems->parse_error = true;
1009 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1010 crc = crc32_be(crc, pos - 2, elen + 2);
1012 elem_parse_failed = false;
1015 case WLAN_EID_LINK_ID:
1016 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1017 elem_parse_failed = true;
1020 elems->lnk_id = (void *)(pos - 2);
1022 case WLAN_EID_CHAN_SWITCH_TIMING:
1023 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1024 elem_parse_failed = true;
1027 elems->ch_sw_timing = (void *)pos;
1029 case WLAN_EID_EXT_CAPABILITY:
1030 elems->ext_capab = pos;
1031 elems->ext_capab_len = elen;
1035 elems->ssid_len = elen;
1037 case WLAN_EID_SUPP_RATES:
1038 elems->supp_rates = pos;
1039 elems->supp_rates_len = elen;
1041 case WLAN_EID_DS_PARAMS:
1043 elems->ds_params = pos;
1045 elem_parse_failed = true;
1048 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1049 elems->tim = (void *)pos;
1050 elems->tim_len = elen;
1052 elem_parse_failed = true;
1054 case WLAN_EID_CHALLENGE:
1055 elems->challenge = pos;
1056 elems->challenge_len = elen;
1058 case WLAN_EID_VENDOR_SPECIFIC:
1059 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1061 /* Microsoft OUI (00:50:F2) */
1064 crc = crc32_be(crc, pos - 2, elen + 2);
1066 if (elen >= 5 && pos[3] == 2) {
1067 /* OUI Type 2 - WMM IE */
1069 elems->wmm_info = pos;
1070 elems->wmm_info_len = elen;
1071 } else if (pos[4] == 1) {
1072 elems->wmm_param = pos;
1073 elems->wmm_param_len = elen;
1080 elems->rsn_len = elen;
1082 case WLAN_EID_ERP_INFO:
1084 elems->erp_info = pos;
1086 elem_parse_failed = true;
1088 case WLAN_EID_EXT_SUPP_RATES:
1089 elems->ext_supp_rates = pos;
1090 elems->ext_supp_rates_len = elen;
1092 case WLAN_EID_HT_CAPABILITY:
1093 if (elen >= sizeof(struct ieee80211_ht_cap))
1094 elems->ht_cap_elem = (void *)pos;
1096 elem_parse_failed = true;
1098 case WLAN_EID_HT_OPERATION:
1099 if (elen >= sizeof(struct ieee80211_ht_operation))
1100 elems->ht_operation = (void *)pos;
1102 elem_parse_failed = true;
1104 case WLAN_EID_VHT_CAPABILITY:
1105 if (elen >= sizeof(struct ieee80211_vht_cap))
1106 elems->vht_cap_elem = (void *)pos;
1108 elem_parse_failed = true;
1110 case WLAN_EID_VHT_OPERATION:
1111 if (elen >= sizeof(struct ieee80211_vht_operation)) {
1112 elems->vht_operation = (void *)pos;
1114 crc = crc32_be(crc, pos - 2, elen + 2);
1117 elem_parse_failed = true;
1119 case WLAN_EID_OPMODE_NOTIF:
1121 elems->opmode_notif = pos;
1123 crc = crc32_be(crc, pos - 2, elen + 2);
1126 elem_parse_failed = true;
1128 case WLAN_EID_MESH_ID:
1129 elems->mesh_id = pos;
1130 elems->mesh_id_len = elen;
1132 case WLAN_EID_MESH_CONFIG:
1133 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1134 elems->mesh_config = (void *)pos;
1136 elem_parse_failed = true;
1138 case WLAN_EID_PEER_MGMT:
1139 elems->peering = pos;
1140 elems->peering_len = elen;
1142 case WLAN_EID_MESH_AWAKE_WINDOW:
1144 elems->awake_window = (void *)pos;
1148 elems->preq_len = elen;
1152 elems->prep_len = elen;
1156 elems->perr_len = elen;
1159 if (elen >= sizeof(struct ieee80211_rann_ie))
1160 elems->rann = (void *)pos;
1162 elem_parse_failed = true;
1164 case WLAN_EID_CHANNEL_SWITCH:
1165 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1166 elem_parse_failed = true;
1169 elems->ch_switch_ie = (void *)pos;
1171 case WLAN_EID_EXT_CHANSWITCH_ANN:
1172 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1173 elem_parse_failed = true;
1176 elems->ext_chansw_ie = (void *)pos;
1178 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1179 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1180 elem_parse_failed = true;
1183 elems->sec_chan_offs = (void *)pos;
1185 case WLAN_EID_CHAN_SWITCH_PARAM:
1187 sizeof(*elems->mesh_chansw_params_ie)) {
1188 elem_parse_failed = true;
1191 elems->mesh_chansw_params_ie = (void *)pos;
1193 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1195 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1196 elem_parse_failed = true;
1199 elems->wide_bw_chansw_ie = (void *)pos;
1201 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1203 elem_parse_failed = true;
1207 * This is a bit tricky, but as we only care about
1208 * the wide bandwidth channel switch element, so
1209 * just parse it out manually.
1211 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1214 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1215 elems->wide_bw_chansw_ie =
1218 elem_parse_failed = true;
1221 case WLAN_EID_COUNTRY:
1222 elems->country_elem = pos;
1223 elems->country_elem_len = elen;
1225 case WLAN_EID_PWR_CONSTRAINT:
1227 elem_parse_failed = true;
1230 elems->pwr_constr_elem = pos;
1232 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1233 /* Lots of different options exist, but we only care
1234 * about the Dynamic Transmit Power Control element.
1235 * First check for the Cisco OUI, then for the DTPC
1239 elem_parse_failed = true;
1243 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1244 pos[2] != 0x96 || pos[3] != 0x00)
1248 elem_parse_failed = true;
1253 crc = crc32_be(crc, pos - 2, elen + 2);
1255 elems->cisco_dtpc_elem = pos;
1257 case WLAN_EID_ADDBA_EXT:
1258 if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1259 elem_parse_failed = true;
1262 elems->addba_ext_ie = (void *)pos;
1264 case WLAN_EID_TIMEOUT_INTERVAL:
1265 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1266 elems->timeout_int = (void *)pos;
1268 elem_parse_failed = true;
1270 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1271 if (elen >= sizeof(*elems->max_idle_period_ie))
1272 elems->max_idle_period_ie = (void *)pos;
1276 elems->rsnx_len = elen;
1278 case WLAN_EID_EXTENSION:
1279 ieee80211_parse_extension_element(calc_crc ?
1287 if (elem_parse_failed)
1288 elems->parse_error = true;
1290 __set_bit(id, seen_elems);
1293 if (!for_each_element_completed(elem, start, len))
1294 elems->parse_error = true;
1299 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1300 struct ieee802_11_elems *elems,
1301 u8 *transmitter_bssid,
1303 u8 *nontransmitted_profile)
1305 const struct element *elem, *sub;
1306 size_t profile_len = 0;
1309 if (!bss_bssid || !transmitter_bssid)
1312 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1313 if (elem->datalen < 2)
1316 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1317 u8 new_bssid[ETH_ALEN];
1320 if (sub->id != 0 || sub->datalen < 4) {
1321 /* not a valid BSS profile */
1325 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1326 sub->data[1] != 2) {
1327 /* The first element of the
1328 * Nontransmitted BSSID Profile is not
1329 * the Nontransmitted BSSID Capability
1335 memset(nontransmitted_profile, 0, len);
1336 profile_len = cfg80211_merge_profile(start, len,
1339 nontransmitted_profile,
1342 /* found a Nontransmitted BSSID Profile */
1343 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1344 nontransmitted_profile,
1346 if (!index || index[1] < 1 || index[2] == 0) {
1347 /* Invalid MBSSID Index element */
1351 cfg80211_gen_new_bssid(transmitter_bssid,
1355 if (ether_addr_equal(new_bssid, bss_bssid)) {
1357 elems->bssid_index_len = index[1];
1358 elems->bssid_index = (void *)&index[2];
1364 return found ? profile_len : 0;
1367 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1368 struct ieee802_11_elems *elems,
1369 u64 filter, u32 crc, u8 *transmitter_bssid,
1372 const struct element *non_inherit = NULL;
1373 u8 *nontransmitted_profile;
1374 int nontransmitted_profile_len = 0;
1376 memset(elems, 0, sizeof(*elems));
1377 elems->ie_start = start;
1378 elems->total_len = len;
1380 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1381 if (nontransmitted_profile) {
1382 nontransmitted_profile_len =
1383 ieee802_11_find_bssid_profile(start, len, elems,
1386 nontransmitted_profile);
1388 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1389 nontransmitted_profile,
1390 nontransmitted_profile_len);
1393 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1396 /* Override with nontransmitted profile, if found */
1397 if (nontransmitted_profile_len)
1398 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1399 nontransmitted_profile_len,
1400 action, elems, 0, 0, NULL);
1402 if (elems->tim && !elems->parse_error) {
1403 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1405 elems->dtim_period = tim_ie->dtim_period;
1406 elems->dtim_count = tim_ie->dtim_count;
1409 /* Override DTIM period and count if needed */
1410 if (elems->bssid_index &&
1411 elems->bssid_index_len >=
1412 offsetofend(struct ieee80211_bssid_index, dtim_period))
1413 elems->dtim_period = elems->bssid_index->dtim_period;
1415 if (elems->bssid_index &&
1416 elems->bssid_index_len >=
1417 offsetofend(struct ieee80211_bssid_index, dtim_count))
1418 elems->dtim_count = elems->bssid_index->dtim_count;
1420 kfree(nontransmitted_profile);
1425 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1426 struct ieee80211_tx_queue_params
1429 struct ieee80211_chanctx_conf *chanctx_conf;
1430 const struct ieee80211_reg_rule *rrule;
1431 const struct ieee80211_wmm_ac *wmm_ac;
1432 u16 center_freq = 0;
1434 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1435 sdata->vif.type != NL80211_IFTYPE_STATION)
1439 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1441 center_freq = chanctx_conf->def.chan->center_freq;
1448 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1450 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1455 if (sdata->vif.type == NL80211_IFTYPE_AP)
1456 wmm_ac = &rrule->wmm_rule.ap[ac];
1458 wmm_ac = &rrule->wmm_rule.client[ac];
1459 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1460 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1461 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1462 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1466 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1467 bool bss_notify, bool enable_qos)
1469 struct ieee80211_local *local = sdata->local;
1470 struct ieee80211_tx_queue_params qparam;
1471 struct ieee80211_chanctx_conf *chanctx_conf;
1474 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1477 if (!local->ops->conf_tx)
1480 if (local->hw.queues < IEEE80211_NUM_ACS)
1483 memset(&qparam, 0, sizeof(qparam));
1486 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1487 use_11b = (chanctx_conf &&
1488 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1489 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1492 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1494 /* Set defaults according to 802.11-2007 Table 7-37 */
1501 /* Confiure old 802.11b/g medium access rules. */
1502 qparam.cw_max = aCWmax;
1503 qparam.cw_min = aCWmin;
1507 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1508 /* Update if QoS is enabled. */
1511 case IEEE80211_AC_BK:
1512 qparam.cw_max = aCWmax;
1513 qparam.cw_min = aCWmin;
1520 /* never happens but let's not leave undefined */
1522 case IEEE80211_AC_BE:
1523 qparam.cw_max = aCWmax;
1524 qparam.cw_min = aCWmin;
1531 case IEEE80211_AC_VI:
1532 qparam.cw_max = aCWmin;
1533 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1537 qparam.txop = 6016/32;
1539 qparam.txop = 3008/32;
1546 case IEEE80211_AC_VO:
1547 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1548 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1552 qparam.txop = 3264/32;
1554 qparam.txop = 1504/32;
1559 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1561 qparam.uapsd = false;
1563 sdata->tx_conf[ac] = qparam;
1564 drv_conf_tx(local, sdata, ac, &qparam);
1567 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1568 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1569 sdata->vif.type != NL80211_IFTYPE_NAN) {
1570 sdata->vif.bss_conf.qos = enable_qos;
1572 ieee80211_bss_info_change_notify(sdata,
1577 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1578 u16 transaction, u16 auth_alg, u16 status,
1579 const u8 *extra, size_t extra_len, const u8 *da,
1580 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1583 struct ieee80211_local *local = sdata->local;
1584 struct sk_buff *skb;
1585 struct ieee80211_mgmt *mgmt;
1588 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1589 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1590 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1594 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1596 mgmt = skb_put_zero(skb, 24 + 6);
1597 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1598 IEEE80211_STYPE_AUTH);
1599 memcpy(mgmt->da, da, ETH_ALEN);
1600 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1601 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1602 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1603 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1604 mgmt->u.auth.status_code = cpu_to_le16(status);
1606 skb_put_data(skb, extra, extra_len);
1608 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1609 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1610 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1614 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1616 ieee80211_tx_skb(sdata, skb);
1619 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1620 const u8 *da, const u8 *bssid,
1621 u16 stype, u16 reason,
1622 bool send_frame, u8 *frame_buf)
1624 struct ieee80211_local *local = sdata->local;
1625 struct sk_buff *skb;
1626 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1629 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1630 mgmt->duration = 0; /* initialize only */
1631 mgmt->seq_ctrl = 0; /* initialize only */
1632 memcpy(mgmt->da, da, ETH_ALEN);
1633 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1634 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1635 /* u.deauth.reason_code == u.disassoc.reason_code */
1636 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1639 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1640 IEEE80211_DEAUTH_FRAME_LEN);
1644 skb_reserve(skb, local->hw.extra_tx_headroom);
1647 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1649 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1650 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1651 IEEE80211_SKB_CB(skb)->flags |=
1652 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1654 ieee80211_tx_skb(sdata, skb);
1658 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1659 u8 *buffer, size_t buffer_len,
1660 const u8 *ie, size_t ie_len,
1661 enum nl80211_band band,
1663 struct cfg80211_chan_def *chandef,
1664 size_t *offset, u32 flags)
1666 struct ieee80211_supported_band *sband;
1667 const struct ieee80211_sta_he_cap *he_cap;
1668 u8 *pos = buffer, *end = buffer + buffer_len;
1670 int supp_rates_len, i;
1676 bool have_80mhz = false;
1680 sband = local->hw.wiphy->bands[band];
1681 if (WARN_ON_ONCE(!sband))
1684 rate_flags = ieee80211_chandef_rate_flags(chandef);
1685 shift = ieee80211_chandef_get_shift(chandef);
1688 for (i = 0; i < sband->n_bitrates; i++) {
1689 if ((BIT(i) & rate_mask) == 0)
1690 continue; /* skip rate */
1691 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1694 rates[num_rates++] =
1695 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1699 supp_rates_len = min_t(int, num_rates, 8);
1701 if (end - pos < 2 + supp_rates_len)
1703 *pos++ = WLAN_EID_SUPP_RATES;
1704 *pos++ = supp_rates_len;
1705 memcpy(pos, rates, supp_rates_len);
1706 pos += supp_rates_len;
1708 /* insert "request information" if in custom IEs */
1710 static const u8 before_extrates[] = {
1712 WLAN_EID_SUPP_RATES,
1715 noffset = ieee80211_ie_split(ie, ie_len,
1717 ARRAY_SIZE(before_extrates),
1719 if (end - pos < noffset - *offset)
1721 memcpy(pos, ie + *offset, noffset - *offset);
1722 pos += noffset - *offset;
1726 ext_rates_len = num_rates - supp_rates_len;
1727 if (ext_rates_len > 0) {
1728 if (end - pos < 2 + ext_rates_len)
1730 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1731 *pos++ = ext_rates_len;
1732 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1733 pos += ext_rates_len;
1736 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1739 *pos++ = WLAN_EID_DS_PARAMS;
1741 *pos++ = ieee80211_frequency_to_channel(
1742 chandef->chan->center_freq);
1745 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1748 /* insert custom IEs that go before HT */
1750 static const u8 before_ht[] = {
1752 * no need to list the ones split off already
1753 * (or generated here)
1756 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1758 noffset = ieee80211_ie_split(ie, ie_len,
1759 before_ht, ARRAY_SIZE(before_ht),
1761 if (end - pos < noffset - *offset)
1763 memcpy(pos, ie + *offset, noffset - *offset);
1764 pos += noffset - *offset;
1768 if (sband->ht_cap.ht_supported) {
1769 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1771 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1775 /* insert custom IEs that go before VHT */
1777 static const u8 before_vht[] = {
1779 * no need to list the ones split off already
1780 * (or generated here)
1782 WLAN_EID_BSS_COEX_2040,
1783 WLAN_EID_EXT_CAPABILITY,
1785 WLAN_EID_CHANNEL_USAGE,
1786 WLAN_EID_INTERWORKING,
1788 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1790 noffset = ieee80211_ie_split(ie, ie_len,
1791 before_vht, ARRAY_SIZE(before_vht),
1793 if (end - pos < noffset - *offset)
1795 memcpy(pos, ie + *offset, noffset - *offset);
1796 pos += noffset - *offset;
1800 /* Check if any channel in this sband supports at least 80 MHz */
1801 for (i = 0; i < sband->n_channels; i++) {
1802 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1803 IEEE80211_CHAN_NO_80MHZ))
1810 if (sband->vht_cap.vht_supported && have_80mhz) {
1811 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1813 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1814 sband->vht_cap.cap);
1817 /* insert custom IEs that go before HE */
1819 static const u8 before_he[] = {
1821 * no need to list the ones split off before VHT
1824 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1826 /* TODO: add 11ah/11aj/11ak elements */
1828 noffset = ieee80211_ie_split(ie, ie_len,
1829 before_he, ARRAY_SIZE(before_he),
1831 if (end - pos < noffset - *offset)
1833 memcpy(pos, ie + *offset, noffset - *offset);
1834 pos += noffset - *offset;
1838 he_cap = ieee80211_get_he_sta_cap(sband);
1840 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1846 * If adding more here, adjust code in main.c
1847 * that calculates local->scan_ies_len.
1850 return pos - buffer;
1852 WARN_ONCE(1, "not enough space for preq IEs\n");
1854 return pos - buffer;
1857 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1859 struct ieee80211_scan_ies *ie_desc,
1860 const u8 *ie, size_t ie_len,
1861 u8 bands_used, u32 *rate_masks,
1862 struct cfg80211_chan_def *chandef,
1865 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1868 memset(ie_desc, 0, sizeof(*ie_desc));
1870 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1871 if (bands_used & BIT(i)) {
1872 pos += ieee80211_build_preq_ies_band(local,
1880 ie_desc->ies[i] = buffer + old_pos;
1881 ie_desc->len[i] = pos - old_pos;
1886 /* add any remaining custom IEs */
1888 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1889 "not enough space for preq custom IEs\n"))
1891 memcpy(buffer + pos, ie + custom_ie_offset,
1892 ie_len - custom_ie_offset);
1893 ie_desc->common_ies = buffer + pos;
1894 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1895 pos += ie_len - custom_ie_offset;
1901 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1902 const u8 *src, const u8 *dst,
1904 struct ieee80211_channel *chan,
1905 const u8 *ssid, size_t ssid_len,
1906 const u8 *ie, size_t ie_len,
1909 struct ieee80211_local *local = sdata->local;
1910 struct cfg80211_chan_def chandef;
1911 struct sk_buff *skb;
1912 struct ieee80211_mgmt *mgmt;
1914 u32 rate_masks[NUM_NL80211_BANDS] = {};
1915 struct ieee80211_scan_ies dummy_ie_desc;
1918 * Do not send DS Channel parameter for directed probe requests
1919 * in order to maximize the chance that we get a response. Some
1920 * badly-behaved APs don't respond when this parameter is included.
1922 chandef.width = sdata->vif.bss_conf.chandef.width;
1923 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1924 chandef.chan = NULL;
1926 chandef.chan = chan;
1928 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1933 rate_masks[chan->band] = ratemask;
1934 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1935 skb_tailroom(skb), &dummy_ie_desc,
1936 ie, ie_len, BIT(chan->band),
1937 rate_masks, &chandef, flags);
1938 skb_put(skb, ies_len);
1941 mgmt = (struct ieee80211_mgmt *) skb->data;
1942 memcpy(mgmt->da, dst, ETH_ALEN);
1943 memcpy(mgmt->bssid, dst, ETH_ALEN);
1946 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1951 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1952 struct ieee802_11_elems *elems,
1953 enum nl80211_band band, u32 *basic_rates)
1955 struct ieee80211_supported_band *sband;
1957 u32 supp_rates, rate_flags;
1960 sband = sdata->local->hw.wiphy->bands[band];
1961 if (WARN_ON(!sband))
1964 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1965 shift = ieee80211_vif_get_shift(&sdata->vif);
1967 num_rates = sband->n_bitrates;
1969 for (i = 0; i < elems->supp_rates_len +
1970 elems->ext_supp_rates_len; i++) {
1974 if (i < elems->supp_rates_len)
1975 rate = elems->supp_rates[i];
1976 else if (elems->ext_supp_rates)
1977 rate = elems->ext_supp_rates
1978 [i - elems->supp_rates_len];
1979 own_rate = 5 * (rate & 0x7f);
1980 is_basic = !!(rate & 0x80);
1982 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1985 for (j = 0; j < num_rates; j++) {
1987 if ((rate_flags & sband->bitrates[j].flags)
1991 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1994 if (brate == own_rate) {
1995 supp_rates |= BIT(j);
1996 if (basic_rates && is_basic)
1997 *basic_rates |= BIT(j);
2004 void ieee80211_stop_device(struct ieee80211_local *local)
2006 ieee80211_led_radio(local, false);
2007 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2009 cancel_work_sync(&local->reconfig_filter);
2011 flush_workqueue(local->workqueue);
2015 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2018 /* It's possible that we don't handle the scan completion in
2019 * time during suspend, so if it's still marked as completed
2020 * here, queue the work and flush it to clean things up.
2021 * Instead of calling the worker function directly here, we
2022 * really queue it to avoid potential races with other flows
2023 * scheduling the same work.
2025 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2026 /* If coming from reconfiguration failure, abort the scan so
2027 * we don't attempt to continue a partial HW scan - which is
2028 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2029 * completed scan, and a 5 GHz portion is still pending.
2032 set_bit(SCAN_ABORTED, &local->scanning);
2033 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2034 flush_delayed_work(&local->scan_work);
2038 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2040 struct ieee80211_sub_if_data *sdata;
2041 struct ieee80211_chanctx *ctx;
2044 * We get here if during resume the device can't be restarted properly.
2045 * We might also get here if this happens during HW reset, which is a
2046 * slightly different situation and we need to drop all connections in
2049 * Ask cfg80211 to turn off all interfaces, this will result in more
2050 * warnings but at least we'll then get into a clean stopped state.
2053 local->resuming = false;
2054 local->suspended = false;
2055 local->in_reconfig = false;
2057 ieee80211_flush_completed_scan(local, true);
2059 /* scheduled scan clearly can't be running any more, but tell
2060 * cfg80211 and clear local state
2062 ieee80211_sched_scan_end(local);
2064 list_for_each_entry(sdata, &local->interfaces, list)
2065 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2067 /* Mark channel contexts as not being in the driver any more to avoid
2068 * removing them from the driver during the shutdown process...
2070 mutex_lock(&local->chanctx_mtx);
2071 list_for_each_entry(ctx, &local->chanctx_list, list)
2072 ctx->driver_present = false;
2073 mutex_unlock(&local->chanctx_mtx);
2075 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2078 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2079 struct ieee80211_sub_if_data *sdata)
2081 struct ieee80211_chanctx_conf *conf;
2082 struct ieee80211_chanctx *ctx;
2084 if (!local->use_chanctx)
2087 mutex_lock(&local->chanctx_mtx);
2088 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2089 lockdep_is_held(&local->chanctx_mtx));
2091 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2092 drv_assign_vif_chanctx(local, sdata, ctx);
2094 mutex_unlock(&local->chanctx_mtx);
2097 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2099 struct ieee80211_local *local = sdata->local;
2100 struct sta_info *sta;
2103 mutex_lock(&local->sta_mtx);
2104 list_for_each_entry(sta, &local->sta_list, list) {
2105 enum ieee80211_sta_state state;
2107 if (!sta->uploaded || sta->sdata != sdata)
2110 for (state = IEEE80211_STA_NOTEXIST;
2111 state < sta->sta_state; state++)
2112 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2115 mutex_unlock(&local->sta_mtx);
2118 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2120 struct cfg80211_nan_func *func, **funcs;
2123 res = drv_start_nan(sdata->local, sdata,
2124 &sdata->u.nan.conf);
2128 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2134 /* Add all the functions:
2135 * This is a little bit ugly. We need to call a potentially sleeping
2136 * callback for each NAN function, so we can't hold the spinlock.
2138 spin_lock_bh(&sdata->u.nan.func_lock);
2140 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2143 spin_unlock_bh(&sdata->u.nan.func_lock);
2145 for (i = 0; funcs[i]; i++) {
2146 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2148 ieee80211_nan_func_terminated(&sdata->vif,
2149 funcs[i]->instance_id,
2150 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2159 int ieee80211_reconfig(struct ieee80211_local *local)
2161 struct ieee80211_hw *hw = &local->hw;
2162 struct ieee80211_sub_if_data *sdata;
2163 struct ieee80211_chanctx *ctx;
2164 struct sta_info *sta;
2166 bool reconfig_due_to_wowlan = false;
2167 struct ieee80211_sub_if_data *sched_scan_sdata;
2168 struct cfg80211_sched_scan_request *sched_scan_req;
2169 bool sched_scan_stopped = false;
2170 bool suspended = local->suspended;
2172 /* nothing to do if HW shouldn't run */
2173 if (!local->open_count)
2178 local->resuming = true;
2180 if (local->wowlan) {
2182 * In the wowlan case, both mac80211 and the device
2183 * are functional when the resume op is called, so
2184 * clear local->suspended so the device could operate
2185 * normally (e.g. pass rx frames).
2187 local->suspended = false;
2188 res = drv_resume(local);
2189 local->wowlan = false;
2191 local->resuming = false;
2198 * res is 1, which means the driver requested
2199 * to go through a regular reset on wakeup.
2200 * restore local->suspended in this case.
2202 reconfig_due_to_wowlan = true;
2203 local->suspended = true;
2208 * In case of hw_restart during suspend (without wowlan),
2209 * cancel restart work, as we are reconfiguring the device
2211 * Note that restart_work is scheduled on a frozen workqueue,
2212 * so we can't deadlock in this case.
2214 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2215 cancel_work_sync(&local->restart_work);
2217 local->started = false;
2220 * Upon resume hardware can sometimes be goofy due to
2221 * various platform / driver / bus issues, so restarting
2222 * the device may at times not work immediately. Propagate
2225 res = drv_start(local);
2228 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2230 WARN(1, "Hardware became unavailable during restart.\n");
2231 ieee80211_handle_reconfig_failure(local);
2235 /* setup fragmentation threshold */
2236 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2238 /* setup RTS threshold */
2239 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2241 /* reset coverage class */
2242 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2244 ieee80211_led_radio(local, true);
2245 ieee80211_mod_tpt_led_trig(local,
2246 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2248 /* add interfaces */
2249 sdata = rtnl_dereference(local->monitor_sdata);
2251 /* in HW restart it exists already */
2252 WARN_ON(local->resuming);
2253 res = drv_add_interface(local, sdata);
2255 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2261 list_for_each_entry(sdata, &local->interfaces, list) {
2262 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2263 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2264 ieee80211_sdata_running(sdata)) {
2265 res = drv_add_interface(local, sdata);
2271 /* If adding any of the interfaces failed above, roll back and
2275 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2277 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2278 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2279 ieee80211_sdata_running(sdata))
2280 drv_remove_interface(local, sdata);
2281 ieee80211_handle_reconfig_failure(local);
2285 /* add channel contexts */
2286 if (local->use_chanctx) {
2287 mutex_lock(&local->chanctx_mtx);
2288 list_for_each_entry(ctx, &local->chanctx_list, list)
2289 if (ctx->replace_state !=
2290 IEEE80211_CHANCTX_REPLACES_OTHER)
2291 WARN_ON(drv_add_chanctx(local, ctx));
2292 mutex_unlock(&local->chanctx_mtx);
2294 sdata = rtnl_dereference(local->monitor_sdata);
2295 if (sdata && ieee80211_sdata_running(sdata))
2296 ieee80211_assign_chanctx(local, sdata);
2299 /* reconfigure hardware */
2300 ieee80211_hw_config(local, ~0);
2302 ieee80211_configure_filter(local);
2304 /* Finally also reconfigure all the BSS information */
2305 list_for_each_entry(sdata, &local->interfaces, list) {
2308 if (!ieee80211_sdata_running(sdata))
2311 ieee80211_assign_chanctx(local, sdata);
2313 switch (sdata->vif.type) {
2314 case NL80211_IFTYPE_AP_VLAN:
2315 case NL80211_IFTYPE_MONITOR:
2317 case NL80211_IFTYPE_ADHOC:
2318 if (sdata->vif.bss_conf.ibss_joined)
2319 WARN_ON(drv_join_ibss(local, sdata));
2322 ieee80211_reconfig_stations(sdata);
2324 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2325 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2326 drv_conf_tx(local, sdata, i,
2327 &sdata->tx_conf[i]);
2331 /* common change flags for all interface types */
2332 changed = BSS_CHANGED_ERP_CTS_PROT |
2333 BSS_CHANGED_ERP_PREAMBLE |
2334 BSS_CHANGED_ERP_SLOT |
2336 BSS_CHANGED_BASIC_RATES |
2337 BSS_CHANGED_BEACON_INT |
2342 BSS_CHANGED_TXPOWER |
2343 BSS_CHANGED_MCAST_RATE;
2345 if (sdata->vif.mu_mimo_owner)
2346 changed |= BSS_CHANGED_MU_GROUPS;
2348 switch (sdata->vif.type) {
2349 case NL80211_IFTYPE_STATION:
2350 changed |= BSS_CHANGED_ASSOC |
2351 BSS_CHANGED_ARP_FILTER |
2354 /* Re-send beacon info report to the driver */
2355 if (sdata->u.mgd.have_beacon)
2356 changed |= BSS_CHANGED_BEACON_INFO;
2358 if (sdata->vif.bss_conf.max_idle_period ||
2359 sdata->vif.bss_conf.protected_keep_alive)
2360 changed |= BSS_CHANGED_KEEP_ALIVE;
2363 ieee80211_bss_info_change_notify(sdata, changed);
2364 sdata_unlock(sdata);
2366 case NL80211_IFTYPE_OCB:
2367 changed |= BSS_CHANGED_OCB;
2368 ieee80211_bss_info_change_notify(sdata, changed);
2370 case NL80211_IFTYPE_ADHOC:
2371 changed |= BSS_CHANGED_IBSS;
2373 case NL80211_IFTYPE_AP:
2374 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2376 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2377 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2378 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2379 changed |= BSS_CHANGED_FTM_RESPONDER;
2381 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2382 changed |= BSS_CHANGED_AP_PROBE_RESP;
2384 if (rcu_access_pointer(sdata->u.ap.beacon))
2385 drv_start_ap(local, sdata);
2389 case NL80211_IFTYPE_MESH_POINT:
2390 if (sdata->vif.bss_conf.enable_beacon) {
2391 changed |= BSS_CHANGED_BEACON |
2392 BSS_CHANGED_BEACON_ENABLED;
2393 ieee80211_bss_info_change_notify(sdata, changed);
2396 case NL80211_IFTYPE_NAN:
2397 res = ieee80211_reconfig_nan(sdata);
2399 ieee80211_handle_reconfig_failure(local);
2403 case NL80211_IFTYPE_WDS:
2404 case NL80211_IFTYPE_AP_VLAN:
2405 case NL80211_IFTYPE_MONITOR:
2406 case NL80211_IFTYPE_P2P_DEVICE:
2409 case NL80211_IFTYPE_UNSPECIFIED:
2410 case NUM_NL80211_IFTYPES:
2411 case NL80211_IFTYPE_P2P_CLIENT:
2412 case NL80211_IFTYPE_P2P_GO:
2418 ieee80211_recalc_ps(local);
2421 * The sta might be in psm against the ap (e.g. because
2422 * this was the state before a hw restart), so we
2423 * explicitly send a null packet in order to make sure
2424 * it'll sync against the ap (and get out of psm).
2426 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2427 list_for_each_entry(sdata, &local->interfaces, list) {
2428 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2430 if (!sdata->u.mgd.associated)
2433 ieee80211_send_nullfunc(local, sdata, false);
2437 /* APs are now beaconing, add back stations */
2438 mutex_lock(&local->sta_mtx);
2439 list_for_each_entry(sta, &local->sta_list, list) {
2440 enum ieee80211_sta_state state;
2445 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2446 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2449 for (state = IEEE80211_STA_NOTEXIST;
2450 state < sta->sta_state; state++)
2451 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2454 mutex_unlock(&local->sta_mtx);
2457 list_for_each_entry(sdata, &local->interfaces, list)
2458 ieee80211_reenable_keys(sdata);
2460 /* Reconfigure sched scan if it was interrupted by FW restart */
2461 mutex_lock(&local->mtx);
2462 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2463 lockdep_is_held(&local->mtx));
2464 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2465 lockdep_is_held(&local->mtx));
2466 if (sched_scan_sdata && sched_scan_req)
2468 * Sched scan stopped, but we don't want to report it. Instead,
2469 * we're trying to reschedule. However, if more than one scan
2470 * plan was set, we cannot reschedule since we don't know which
2471 * scan plan was currently running (and some scan plans may have
2472 * already finished).
2474 if (sched_scan_req->n_scan_plans > 1 ||
2475 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2477 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2478 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2479 sched_scan_stopped = true;
2481 mutex_unlock(&local->mtx);
2483 if (sched_scan_stopped)
2484 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2488 if (local->monitors == local->open_count && local->monitors > 0)
2489 ieee80211_add_virtual_monitor(local);
2492 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2493 * sessions can be established after a resume.
2495 * Also tear down aggregation sessions since reconfiguring
2496 * them in a hardware restart scenario is not easily done
2497 * right now, and the hardware will have lost information
2498 * about the sessions, but we and the AP still think they
2499 * are active. This is really a workaround though.
2501 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2502 mutex_lock(&local->sta_mtx);
2504 list_for_each_entry(sta, &local->sta_list, list) {
2505 if (!local->resuming)
2506 ieee80211_sta_tear_down_BA_sessions(
2507 sta, AGG_STOP_LOCAL_REQUEST);
2508 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2511 mutex_unlock(&local->sta_mtx);
2514 if (local->in_reconfig) {
2515 local->in_reconfig = false;
2518 /* Restart deferred ROCs */
2519 mutex_lock(&local->mtx);
2520 ieee80211_start_next_roc(local);
2521 mutex_unlock(&local->mtx);
2523 /* Requeue all works */
2524 list_for_each_entry(sdata, &local->interfaces, list)
2525 ieee80211_queue_work(&local->hw, &sdata->work);
2528 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2529 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2533 * If this is for hw restart things are still running.
2534 * We may want to change that later, however.
2536 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2537 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2543 /* first set suspended false, then resuming */
2544 local->suspended = false;
2546 local->resuming = false;
2548 ieee80211_flush_completed_scan(local, false);
2550 if (local->open_count && !reconfig_due_to_wowlan)
2551 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2553 list_for_each_entry(sdata, &local->interfaces, list) {
2554 if (!ieee80211_sdata_running(sdata))
2556 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2557 ieee80211_sta_restart(sdata);
2560 mod_timer(&local->sta_cleanup, jiffies + 1);
2568 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2570 struct ieee80211_sub_if_data *sdata;
2571 struct ieee80211_local *local;
2572 struct ieee80211_key *key;
2577 sdata = vif_to_sdata(vif);
2578 local = sdata->local;
2580 if (WARN_ON(!local->resuming))
2583 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2586 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2588 mutex_lock(&local->key_mtx);
2589 list_for_each_entry(key, &sdata->key_list, list)
2590 key->flags |= KEY_FLAG_TAINTED;
2591 mutex_unlock(&local->key_mtx);
2593 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2595 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2597 struct ieee80211_local *local = sdata->local;
2598 struct ieee80211_chanctx_conf *chanctx_conf;
2599 struct ieee80211_chanctx *chanctx;
2601 mutex_lock(&local->chanctx_mtx);
2603 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2604 lockdep_is_held(&local->chanctx_mtx));
2607 * This function can be called from a work, thus it may be possible
2608 * that the chanctx_conf is removed (due to a disconnection, for
2610 * So nothing should be done in such case.
2615 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2616 ieee80211_recalc_smps_chanctx(local, chanctx);
2618 mutex_unlock(&local->chanctx_mtx);
2621 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2623 struct ieee80211_local *local = sdata->local;
2624 struct ieee80211_chanctx_conf *chanctx_conf;
2625 struct ieee80211_chanctx *chanctx;
2627 mutex_lock(&local->chanctx_mtx);
2629 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2630 lockdep_is_held(&local->chanctx_mtx));
2632 if (WARN_ON_ONCE(!chanctx_conf))
2635 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2636 ieee80211_recalc_chanctx_min_def(local, chanctx);
2638 mutex_unlock(&local->chanctx_mtx);
2641 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2643 size_t pos = offset;
2645 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2646 pos += 2 + ies[pos + 1];
2651 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2655 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2657 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2661 * Scale up threshold values before storing it, as the RSSI averaging
2662 * algorithm uses a scaled up value as well. Change this scaling
2663 * factor if the RSSI averaging algorithm changes.
2665 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2666 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2669 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2673 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2675 WARN_ON(rssi_min_thold == rssi_max_thold ||
2676 rssi_min_thold > rssi_max_thold);
2678 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2681 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2683 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2685 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2687 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2689 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2691 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2696 *pos++ = WLAN_EID_HT_CAPABILITY;
2697 *pos++ = sizeof(struct ieee80211_ht_cap);
2698 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2700 /* capability flags */
2701 tmp = cpu_to_le16(cap);
2702 memcpy(pos, &tmp, sizeof(u16));
2705 /* AMPDU parameters */
2706 *pos++ = ht_cap->ampdu_factor |
2707 (ht_cap->ampdu_density <<
2708 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2711 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2712 pos += sizeof(ht_cap->mcs);
2714 /* extended capabilities */
2715 pos += sizeof(__le16);
2717 /* BF capabilities */
2718 pos += sizeof(__le32);
2720 /* antenna selection */
2726 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2731 *pos++ = WLAN_EID_VHT_CAPABILITY;
2732 *pos++ = sizeof(struct ieee80211_vht_cap);
2733 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2735 /* capability flags */
2736 tmp = cpu_to_le32(cap);
2737 memcpy(pos, &tmp, sizeof(u32));
2741 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2742 pos += sizeof(vht_cap->vht_mcs);
2747 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2749 const struct ieee80211_sta_he_cap *he_cap;
2750 struct ieee80211_supported_band *sband;
2753 sband = ieee80211_get_sband(sdata);
2757 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2761 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2763 sizeof(he_cap->he_cap_elem) + n +
2764 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2765 he_cap->he_cap_elem.phy_cap_info);
2768 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2769 const struct ieee80211_sta_he_cap *he_cap,
2776 /* Make sure we have place for the IE */
2778 * TODO: the 1 added is because this temporarily is under the EXTENSION
2779 * IE. Get rid of it when it moves.
2784 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2786 sizeof(he_cap->he_cap_elem) + n +
2787 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2788 he_cap->he_cap_elem.phy_cap_info);
2790 if ((end - pos) < ie_len)
2793 *pos++ = WLAN_EID_EXTENSION;
2794 pos++; /* We'll set the size later below */
2795 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2798 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2799 pos += sizeof(he_cap->he_cap_elem);
2801 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2804 /* Check if PPE Threshold should be present */
2805 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2806 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2810 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2811 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2813 n = hweight8(he_cap->ppe_thres[0] &
2814 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2815 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2816 IEEE80211_PPE_THRES_NSS_POS));
2819 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2822 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2823 n = DIV_ROUND_UP(n, 8);
2825 /* Copy PPE Thresholds */
2826 memcpy(pos, &he_cap->ppe_thres, n);
2830 orig_pos[1] = (pos - orig_pos) - 2;
2834 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2835 const struct cfg80211_chan_def *chandef,
2836 u16 prot_mode, bool rifs_mode)
2838 struct ieee80211_ht_operation *ht_oper;
2839 /* Build HT Information */
2840 *pos++ = WLAN_EID_HT_OPERATION;
2841 *pos++ = sizeof(struct ieee80211_ht_operation);
2842 ht_oper = (struct ieee80211_ht_operation *)pos;
2843 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2844 chandef->chan->center_freq);
2845 switch (chandef->width) {
2846 case NL80211_CHAN_WIDTH_160:
2847 case NL80211_CHAN_WIDTH_80P80:
2848 case NL80211_CHAN_WIDTH_80:
2849 case NL80211_CHAN_WIDTH_40:
2850 if (chandef->center_freq1 > chandef->chan->center_freq)
2851 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2853 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2856 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2859 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2860 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2861 chandef->width != NL80211_CHAN_WIDTH_20)
2862 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2865 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2867 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2868 ht_oper->stbc_param = 0x0000;
2870 /* It seems that Basic MCS set and Supported MCS set
2871 are identical for the first 10 bytes */
2872 memset(&ht_oper->basic_set, 0, 16);
2873 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2875 return pos + sizeof(struct ieee80211_ht_operation);
2878 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2879 const struct cfg80211_chan_def *chandef)
2881 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2882 *pos++ = 3; /* IE length */
2883 /* New channel width */
2884 switch (chandef->width) {
2885 case NL80211_CHAN_WIDTH_80:
2886 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2888 case NL80211_CHAN_WIDTH_160:
2889 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2891 case NL80211_CHAN_WIDTH_80P80:
2892 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2895 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2898 /* new center frequency segment 0 */
2899 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2900 /* new center frequency segment 1 */
2901 if (chandef->center_freq2)
2902 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2907 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2908 const struct cfg80211_chan_def *chandef)
2910 struct ieee80211_vht_operation *vht_oper;
2912 *pos++ = WLAN_EID_VHT_OPERATION;
2913 *pos++ = sizeof(struct ieee80211_vht_operation);
2914 vht_oper = (struct ieee80211_vht_operation *)pos;
2915 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2916 chandef->center_freq1);
2917 if (chandef->center_freq2)
2918 vht_oper->center_freq_seg1_idx =
2919 ieee80211_frequency_to_channel(chandef->center_freq2);
2921 vht_oper->center_freq_seg1_idx = 0x00;
2923 switch (chandef->width) {
2924 case NL80211_CHAN_WIDTH_160:
2926 * Convert 160 MHz channel width to new style as interop
2929 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2930 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2931 if (chandef->chan->center_freq < chandef->center_freq1)
2932 vht_oper->center_freq_seg0_idx -= 8;
2934 vht_oper->center_freq_seg0_idx += 8;
2936 case NL80211_CHAN_WIDTH_80P80:
2938 * Convert 80+80 MHz channel width to new style as interop
2941 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2943 case NL80211_CHAN_WIDTH_80:
2944 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2947 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2951 /* don't require special VHT peer rates */
2952 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2954 return pos + sizeof(struct ieee80211_vht_operation);
2957 u8 *ieee80211_ie_build_he_oper(u8 *pos)
2959 struct ieee80211_he_operation *he_oper;
2962 *pos++ = WLAN_EID_EXTENSION;
2963 *pos++ = 1 + sizeof(struct ieee80211_he_operation);
2964 *pos++ = WLAN_EID_EXT_HE_OPERATION;
2967 he_oper_params |= u32_encode_bits(1023, /* disabled */
2968 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
2969 he_oper_params |= u32_encode_bits(1,
2970 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
2971 he_oper_params |= u32_encode_bits(1,
2972 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
2974 he_oper = (struct ieee80211_he_operation *)pos;
2975 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
2977 /* don't require special HE peer rates */
2978 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
2980 /* TODO add VHT operational and 6GHz operational subelement? */
2982 return pos + sizeof(struct ieee80211_vht_operation);
2985 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2986 struct cfg80211_chan_def *chandef)
2988 enum nl80211_channel_type channel_type;
2993 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2994 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2995 channel_type = NL80211_CHAN_HT20;
2997 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2998 channel_type = NL80211_CHAN_HT40PLUS;
3000 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3001 channel_type = NL80211_CHAN_HT40MINUS;
3004 channel_type = NL80211_CHAN_NO_HT;
3008 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3012 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
3013 const struct ieee80211_vht_operation *oper,
3014 const struct ieee80211_ht_operation *htop,
3015 struct cfg80211_chan_def *chandef)
3017 struct cfg80211_chan_def new = *chandef;
3019 int ccfs0, ccfs1, ccfs2;
3022 bool support_80_80 = false;
3023 bool support_160 = false;
3028 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3029 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3030 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3031 support_80_80 = ((vht_cap &
3032 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3033 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3034 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3035 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3036 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3037 ccfs0 = oper->center_freq_seg0_idx;
3038 ccfs1 = oper->center_freq_seg1_idx;
3039 ccfs2 = (le16_to_cpu(htop->operation_mode) &
3040 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3041 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3043 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
3046 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3049 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3050 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3052 switch (oper->chan_width) {
3053 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3054 /* just use HT information directly */
3056 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3057 new.width = NL80211_CHAN_WIDTH_80;
3058 new.center_freq1 = cf0;
3059 /* If needed, adjust based on the newer interop workaround. */
3063 diff = abs(ccf1 - ccf0);
3064 if ((diff == 8) && support_160) {
3065 new.width = NL80211_CHAN_WIDTH_160;
3066 new.center_freq1 = cf1;
3067 } else if ((diff > 8) && support_80_80) {
3068 new.width = NL80211_CHAN_WIDTH_80P80;
3069 new.center_freq2 = cf1;
3073 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3074 /* deprecated encoding */
3075 new.width = NL80211_CHAN_WIDTH_160;
3076 new.center_freq1 = cf0;
3078 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3079 /* deprecated encoding */
3080 new.width = NL80211_CHAN_WIDTH_80P80;
3081 new.center_freq1 = cf0;
3082 new.center_freq2 = cf1;
3088 if (!cfg80211_chandef_valid(&new))
3095 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3096 const struct ieee80211_supported_band *sband,
3097 const u8 *srates, int srates_len, u32 *rates)
3099 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3100 int shift = ieee80211_chandef_get_shift(chandef);
3101 struct ieee80211_rate *br;
3102 int brate, rate, i, j, count = 0;
3106 for (i = 0; i < srates_len; i++) {
3107 rate = srates[i] & 0x7f;
3109 for (j = 0; j < sband->n_bitrates; j++) {
3110 br = &sband->bitrates[j];
3111 if ((rate_flags & br->flags) != rate_flags)
3114 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3115 if (brate == rate) {
3125 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3126 struct sk_buff *skb, bool need_basic,
3127 enum nl80211_band band)
3129 struct ieee80211_local *local = sdata->local;
3130 struct ieee80211_supported_band *sband;
3133 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3136 shift = ieee80211_vif_get_shift(&sdata->vif);
3137 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3138 sband = local->hw.wiphy->bands[band];
3140 for (i = 0; i < sband->n_bitrates; i++) {
3141 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3148 if (skb_tailroom(skb) < rates + 2)
3151 pos = skb_put(skb, rates + 2);
3152 *pos++ = WLAN_EID_SUPP_RATES;
3154 for (i = 0; i < rates; i++) {
3156 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3159 if (need_basic && basic_rates & BIT(i))
3161 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3163 *pos++ = basic | (u8) rate;
3169 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3170 struct sk_buff *skb, bool need_basic,
3171 enum nl80211_band band)
3173 struct ieee80211_local *local = sdata->local;
3174 struct ieee80211_supported_band *sband;
3176 u8 i, exrates, *pos;
3177 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3180 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3181 shift = ieee80211_vif_get_shift(&sdata->vif);
3183 sband = local->hw.wiphy->bands[band];
3185 for (i = 0; i < sband->n_bitrates; i++) {
3186 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3196 if (skb_tailroom(skb) < exrates + 2)
3200 pos = skb_put(skb, exrates + 2);
3201 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3203 for (i = 8; i < sband->n_bitrates; i++) {
3205 if ((rate_flags & sband->bitrates[i].flags)
3208 if (need_basic && basic_rates & BIT(i))
3210 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3212 *pos++ = basic | (u8) rate;
3218 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3220 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3221 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3223 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3224 /* non-managed type inferfaces */
3227 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3229 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3231 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3236 /* TODO: consider rx_highest */
3238 if (mcs->rx_mask[3])
3240 if (mcs->rx_mask[2])
3242 if (mcs->rx_mask[1])
3248 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3249 * @local: mac80211 hw info struct
3250 * @status: RX status
3251 * @mpdu_len: total MPDU length (including FCS)
3252 * @mpdu_offset: offset into MPDU to calculate timestamp at
3254 * This function calculates the RX timestamp at the given MPDU offset, taking
3255 * into account what the RX timestamp was. An offset of 0 will just normalize
3256 * the timestamp to TSF at beginning of MPDU reception.
3258 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3259 struct ieee80211_rx_status *status,
3260 unsigned int mpdu_len,
3261 unsigned int mpdu_offset)
3263 u64 ts = status->mactime;
3264 struct rate_info ri;
3267 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3270 memset(&ri, 0, sizeof(ri));
3274 /* Fill cfg80211 rate info */
3275 switch (status->encoding) {
3277 ri.mcs = status->rate_idx;
3278 ri.flags |= RATE_INFO_FLAGS_MCS;
3279 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3280 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3283 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3284 ri.mcs = status->rate_idx;
3285 ri.nss = status->nss;
3286 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3287 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3292 case RX_ENC_LEGACY: {
3293 struct ieee80211_supported_band *sband;
3297 switch (status->bw) {
3298 case RATE_INFO_BW_10:
3301 case RATE_INFO_BW_5:
3306 sband = local->hw.wiphy->bands[status->band];
3307 bitrate = sband->bitrates[status->rate_idx].bitrate;
3308 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3310 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3311 /* TODO: handle HT/VHT preambles */
3312 if (status->band == NL80211_BAND_5GHZ) {
3315 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3325 rate = cfg80211_calculate_bitrate(&ri);
3326 if (WARN_ONCE(!rate,
3327 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3328 (unsigned long long)status->flag, status->rate_idx,
3332 /* rewind from end of MPDU */
3333 if (status->flag & RX_FLAG_MACTIME_END)
3334 ts -= mpdu_len * 8 * 10 / rate;
3336 ts += mpdu_offset * 8 * 10 / rate;
3341 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3343 struct ieee80211_sub_if_data *sdata;
3344 struct cfg80211_chan_def chandef;
3346 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3349 mutex_lock(&local->mtx);
3350 list_for_each_entry(sdata, &local->interfaces, list) {
3351 /* it might be waiting for the local->mtx, but then
3352 * by the time it gets it, sdata->wdev.cac_started
3353 * will no longer be true
3355 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3357 if (sdata->wdev.cac_started) {
3358 chandef = sdata->vif.bss_conf.chandef;
3359 ieee80211_vif_release_channel(sdata);
3360 cfg80211_cac_event(sdata->dev,
3362 NL80211_RADAR_CAC_ABORTED,
3366 mutex_unlock(&local->mtx);
3369 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3371 struct ieee80211_local *local =
3372 container_of(work, struct ieee80211_local, radar_detected_work);
3373 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3374 struct ieee80211_chanctx *ctx;
3375 int num_chanctx = 0;
3377 mutex_lock(&local->chanctx_mtx);
3378 list_for_each_entry(ctx, &local->chanctx_list, list) {
3379 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3383 chandef = ctx->conf.def;
3385 mutex_unlock(&local->chanctx_mtx);
3388 ieee80211_dfs_cac_cancel(local);
3391 if (num_chanctx > 1)
3392 /* XXX: multi-channel is not supported yet */
3395 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3398 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3400 struct ieee80211_local *local = hw_to_local(hw);
3402 trace_api_radar_detected(local);
3404 schedule_work(&local->radar_detected_work);
3406 EXPORT_SYMBOL(ieee80211_radar_detected);
3408 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3414 case NL80211_CHAN_WIDTH_20:
3415 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3416 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3418 case NL80211_CHAN_WIDTH_40:
3419 c->width = NL80211_CHAN_WIDTH_20;
3420 c->center_freq1 = c->chan->center_freq;
3421 ret = IEEE80211_STA_DISABLE_40MHZ |
3422 IEEE80211_STA_DISABLE_VHT;
3424 case NL80211_CHAN_WIDTH_80:
3425 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3429 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3430 c->width = NL80211_CHAN_WIDTH_40;
3431 ret = IEEE80211_STA_DISABLE_VHT;
3433 case NL80211_CHAN_WIDTH_80P80:
3434 c->center_freq2 = 0;
3435 c->width = NL80211_CHAN_WIDTH_80;
3436 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3437 IEEE80211_STA_DISABLE_160MHZ;
3439 case NL80211_CHAN_WIDTH_160:
3441 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3444 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3445 c->width = NL80211_CHAN_WIDTH_80;
3446 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3447 IEEE80211_STA_DISABLE_160MHZ;
3450 case NL80211_CHAN_WIDTH_20_NOHT:
3452 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3453 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3455 case NL80211_CHAN_WIDTH_5:
3456 case NL80211_CHAN_WIDTH_10:
3459 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3463 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3469 * Returns true if smps_mode_new is strictly more restrictive than
3472 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3473 enum ieee80211_smps_mode smps_mode_new)
3475 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3476 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3479 switch (smps_mode_old) {
3480 case IEEE80211_SMPS_STATIC:
3482 case IEEE80211_SMPS_DYNAMIC:
3483 return smps_mode_new == IEEE80211_SMPS_STATIC;
3484 case IEEE80211_SMPS_OFF:
3485 return smps_mode_new != IEEE80211_SMPS_OFF;
3493 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3494 struct cfg80211_csa_settings *csa_settings)
3496 struct sk_buff *skb;
3497 struct ieee80211_mgmt *mgmt;
3498 struct ieee80211_local *local = sdata->local;
3500 int hdr_len = offsetofend(struct ieee80211_mgmt,
3501 u.action.u.chan_switch);
3504 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3505 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3508 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3509 5 + /* channel switch announcement element */
3510 3 + /* secondary channel offset element */
3511 5 + /* wide bandwidth channel switch announcement */
3512 8); /* mesh channel switch parameters element */
3516 skb_reserve(skb, local->tx_headroom);
3517 mgmt = skb_put_zero(skb, hdr_len);
3518 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3519 IEEE80211_STYPE_ACTION);
3521 eth_broadcast_addr(mgmt->da);
3522 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3523 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3524 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3526 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3527 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3529 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3530 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3531 pos = skb_put(skb, 5);
3532 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3533 *pos++ = 3; /* IE length */
3534 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3535 freq = csa_settings->chandef.chan->center_freq;
3536 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3537 *pos++ = csa_settings->count; /* count */
3539 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3540 enum nl80211_channel_type ch_type;
3543 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3544 *pos++ = 1; /* IE length */
3545 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3546 if (ch_type == NL80211_CHAN_HT40PLUS)
3547 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3549 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3552 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3553 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3556 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3557 *pos++ = 6; /* IE length */
3558 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3559 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3560 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3561 *pos++ |= csa_settings->block_tx ?
3562 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3563 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3565 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3569 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3570 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3571 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3573 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3576 ieee80211_tx_skb(sdata, skb);
3580 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3582 return !(cs == NULL || cs->cipher == 0 ||
3583 cs->hdr_len < cs->pn_len + cs->pn_off ||
3584 cs->hdr_len <= cs->key_idx_off ||
3585 cs->key_idx_shift > 7 ||
3586 cs->key_idx_mask == 0);
3589 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3593 /* Ensure we have enough iftype bitmap space for all iftype values */
3594 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3596 for (i = 0; i < n; i++)
3597 if (!ieee80211_cs_valid(&cs[i]))
3603 const struct ieee80211_cipher_scheme *
3604 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3605 enum nl80211_iftype iftype)
3607 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3608 int n = local->hw.n_cipher_schemes;
3610 const struct ieee80211_cipher_scheme *cs = NULL;
3612 for (i = 0; i < n; i++) {
3613 if (l[i].cipher == cipher) {
3619 if (!cs || !(cs->iftype & BIT(iftype)))
3625 int ieee80211_cs_headroom(struct ieee80211_local *local,
3626 struct cfg80211_crypto_settings *crypto,
3627 enum nl80211_iftype iftype)
3629 const struct ieee80211_cipher_scheme *cs;
3630 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3633 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3634 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3637 if (cs && headroom < cs->hdr_len)
3638 headroom = cs->hdr_len;
3641 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3642 if (cs && headroom < cs->hdr_len)
3643 headroom = cs->hdr_len;
3649 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3651 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3658 if (data->count[i] == 1)
3661 if (data->desc[i].interval == 0)
3664 /* End time is in the past, check for repetitions */
3665 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3666 if (data->count[i] < 255) {
3667 if (data->count[i] <= skip) {
3672 data->count[i] -= skip;
3675 data->desc[i].start += skip * data->desc[i].interval;
3681 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3687 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3690 if (!data->count[i])
3693 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3696 cur = data->desc[i].start - tsf;
3700 cur = data->desc[i].start + data->desc[i].duration - tsf;
3709 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3714 * arbitrary limit, used to avoid infinite loops when combined NoA
3715 * descriptors cover the full time period.
3719 ieee80211_extend_absent_time(data, tsf, &offset);
3721 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3725 } while (tries < max_tries);
3730 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3732 u32 next_offset = BIT(31) - 1;
3736 data->has_next_tsf = false;
3737 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3740 if (!data->count[i])
3743 ieee80211_extend_noa_desc(data, tsf, i);
3744 start = data->desc[i].start - tsf;
3746 data->absent |= BIT(i);
3748 if (next_offset > start)
3749 next_offset = start;
3751 data->has_next_tsf = true;
3755 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3757 data->next_tsf = tsf + next_offset;
3759 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3761 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3762 struct ieee80211_noa_data *data, u32 tsf)
3767 memset(data, 0, sizeof(*data));
3769 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3770 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3772 if (!desc->count || !desc->duration)
3775 data->count[i] = desc->count;
3776 data->desc[i].start = le32_to_cpu(desc->start_time);
3777 data->desc[i].duration = le32_to_cpu(desc->duration);
3778 data->desc[i].interval = le32_to_cpu(desc->interval);
3780 if (data->count[i] > 1 &&
3781 data->desc[i].interval < data->desc[i].duration)
3784 ieee80211_extend_noa_desc(data, tsf, i);
3789 ieee80211_update_p2p_noa(data, tsf);
3793 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3795 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3796 struct ieee80211_sub_if_data *sdata)
3798 u64 tsf = drv_get_tsf(local, sdata);
3800 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3801 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3805 if (tsf == -1ULL || !beacon_int || !dtim_period)
3808 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3809 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3813 ps = &sdata->bss->ps;
3814 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3815 ps = &sdata->u.mesh.ps;
3821 * actually finds last dtim_count, mac80211 will update in
3822 * __beacon_add_tim().
3823 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3825 do_div(tsf, beacon_int);
3826 bcns_from_dtim = do_div(tsf, dtim_period);
3827 /* just had a DTIM */
3828 if (!bcns_from_dtim)
3831 dtim_count = dtim_period - bcns_from_dtim;
3833 ps->dtim_count = dtim_count;
3836 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3837 struct ieee80211_chanctx *ctx)
3839 struct ieee80211_sub_if_data *sdata;
3840 u8 radar_detect = 0;
3842 lockdep_assert_held(&local->chanctx_mtx);
3844 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3847 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3848 if (sdata->reserved_radar_required)
3849 radar_detect |= BIT(sdata->reserved_chandef.width);
3852 * An in-place reservation context should not have any assigned vifs
3853 * until it replaces the other context.
3855 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3856 !list_empty(&ctx->assigned_vifs));
3858 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3859 if (sdata->radar_required)
3860 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3862 return radar_detect;
3865 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3866 const struct cfg80211_chan_def *chandef,
3867 enum ieee80211_chanctx_mode chanmode,
3870 struct ieee80211_local *local = sdata->local;
3871 struct ieee80211_sub_if_data *sdata_iter;
3872 enum nl80211_iftype iftype = sdata->wdev.iftype;
3873 struct ieee80211_chanctx *ctx;
3875 struct iface_combination_params params = {
3876 .radar_detect = radar_detect,
3879 lockdep_assert_held(&local->chanctx_mtx);
3881 if (WARN_ON(hweight32(radar_detect) > 1))
3884 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3888 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3891 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3892 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3894 * always passing this is harmless, since it'll be the
3895 * same value that cfg80211 finds if it finds the same
3896 * interface ... and that's always allowed
3898 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3901 /* Always allow software iftypes */
3902 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
3909 params.num_different_channels = 1;
3911 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3912 params.iftype_num[iftype] = 1;
3914 list_for_each_entry(ctx, &local->chanctx_list, list) {
3915 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3917 params.radar_detect |=
3918 ieee80211_chanctx_radar_detect(local, ctx);
3919 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3920 params.num_different_channels++;
3923 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3924 cfg80211_chandef_compatible(chandef,
3927 params.num_different_channels++;
3930 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3931 struct wireless_dev *wdev_iter;
3933 wdev_iter = &sdata_iter->wdev;
3935 if (sdata_iter == sdata ||
3936 !ieee80211_sdata_running(sdata_iter) ||
3937 cfg80211_iftype_allowed(local->hw.wiphy,
3938 wdev_iter->iftype, 0, 1))
3941 params.iftype_num[wdev_iter->iftype]++;
3945 if (total == 1 && !params.radar_detect)
3948 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3952 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3955 u32 *max_num_different_channels = data;
3957 *max_num_different_channels = max(*max_num_different_channels,
3958 c->num_different_channels);
3961 int ieee80211_max_num_channels(struct ieee80211_local *local)
3963 struct ieee80211_sub_if_data *sdata;
3964 struct ieee80211_chanctx *ctx;
3965 u32 max_num_different_channels = 1;
3967 struct iface_combination_params params = {0};
3969 lockdep_assert_held(&local->chanctx_mtx);
3971 list_for_each_entry(ctx, &local->chanctx_list, list) {
3972 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3975 params.num_different_channels++;
3977 params.radar_detect |=
3978 ieee80211_chanctx_radar_detect(local, ctx);
3981 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3982 params.iftype_num[sdata->wdev.iftype]++;
3984 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3985 ieee80211_iter_max_chans,
3986 &max_num_different_channels);
3990 return max_num_different_channels;
3993 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3995 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3996 *buf++ = 7; /* len */
3997 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4000 *buf++ = 2; /* WME */
4001 *buf++ = 0; /* WME info */
4002 *buf++ = 1; /* WME ver */
4003 *buf++ = qosinfo; /* U-APSD no in use */
4008 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4009 unsigned long *frame_cnt,
4010 unsigned long *byte_cnt)
4012 struct txq_info *txqi = to_txq_info(txq);
4013 u32 frag_cnt = 0, frag_bytes = 0;
4014 struct sk_buff *skb;
4016 skb_queue_walk(&txqi->frags, skb) {
4018 frag_bytes += skb->len;
4022 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4025 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4027 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4029 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4030 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4031 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4032 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4033 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK