2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015-2017 Intel Deutschland GmbH
8 * Copyright (C) 2018 Intel Corporation
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License version 2 as
12 * published by the Free Software Foundation.
14 * utilities for mac80211
17 #include <net/mac80211.h>
18 #include <linux/netdevice.h>
19 #include <linux/export.h>
20 #include <linux/types.h>
21 #include <linux/slab.h>
22 #include <linux/skbuff.h>
23 #include <linux/etherdevice.h>
24 #include <linux/if_arp.h>
25 #include <linux/bitmap.h>
26 #include <linux/crc32.h>
27 #include <net/net_namespace.h>
28 #include <net/cfg80211.h>
29 #include <net/rtnetlink.h>
31 #include "ieee80211_i.h"
32 #include "driver-ops.h"
39 /* privid for wiphys to determine whether they belong to us or not */
40 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
42 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
44 struct ieee80211_local *local;
47 local = wiphy_priv(wiphy);
50 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
52 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
55 struct ieee80211_hdr *hdr;
57 skb_queue_walk(&tx->skbs, skb) {
58 hdr = (struct ieee80211_hdr *) skb->data;
59 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
63 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
64 int rate, int erp, int short_preamble,
69 /* calculate duration (in microseconds, rounded up to next higher
70 * integer if it includes a fractional microsecond) to send frame of
71 * len bytes (does not include FCS) at the given rate. Duration will
74 * rate is in 100 kbps, so divident is multiplied by 10 in the
75 * DIV_ROUND_UP() operations.
77 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
78 * is assumed to be 0 otherwise.
81 if (band == NL80211_BAND_5GHZ || erp) {
85 * N_DBPS = DATARATE x 4
86 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
87 * (16 = SIGNAL time, 6 = tail bits)
88 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
91 * 802.11a - 18.5.2: aSIFSTime = 16 usec
92 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
95 dur = 16; /* SIFS + signal ext */
96 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
97 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
99 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 4 for 5 MHz
101 * * times 2 for 10 MHz
105 /* rates should already consider the channel bandwidth,
106 * don't apply divisor again.
108 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
109 4 * rate); /* T_SYM x N_SYM */
112 * 802.11b or 802.11g with 802.11b compatibility:
113 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
114 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
116 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
117 * aSIFSTime = 10 usec
118 * aPreambleLength = 144 usec or 72 usec with short preamble
119 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
121 dur = 10; /* aSIFSTime = 10 usec */
122 dur += short_preamble ? (72 + 24) : (144 + 48);
124 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
130 /* Exported duration function for driver use */
131 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
132 struct ieee80211_vif *vif,
133 enum nl80211_band band,
135 struct ieee80211_rate *rate)
137 struct ieee80211_sub_if_data *sdata;
140 bool short_preamble = false;
144 sdata = vif_to_sdata(vif);
145 short_preamble = sdata->vif.bss_conf.use_short_preamble;
146 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
147 erp = rate->flags & IEEE80211_RATE_ERP_G;
148 shift = ieee80211_vif_get_shift(vif);
151 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
152 short_preamble, shift);
154 return cpu_to_le16(dur);
156 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
158 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
159 struct ieee80211_vif *vif, size_t frame_len,
160 const struct ieee80211_tx_info *frame_txctl)
162 struct ieee80211_local *local = hw_to_local(hw);
163 struct ieee80211_rate *rate;
164 struct ieee80211_sub_if_data *sdata;
166 int erp, shift = 0, bitrate;
168 struct ieee80211_supported_band *sband;
170 sband = local->hw.wiphy->bands[frame_txctl->band];
172 short_preamble = false;
174 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
178 sdata = vif_to_sdata(vif);
179 short_preamble = sdata->vif.bss_conf.use_short_preamble;
180 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
181 erp = rate->flags & IEEE80211_RATE_ERP_G;
182 shift = ieee80211_vif_get_shift(vif);
185 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
188 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
189 erp, short_preamble, shift);
190 /* Data frame duration */
191 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
192 erp, short_preamble, shift);
194 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
195 erp, short_preamble, shift);
197 return cpu_to_le16(dur);
199 EXPORT_SYMBOL(ieee80211_rts_duration);
201 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
202 struct ieee80211_vif *vif,
204 const struct ieee80211_tx_info *frame_txctl)
206 struct ieee80211_local *local = hw_to_local(hw);
207 struct ieee80211_rate *rate;
208 struct ieee80211_sub_if_data *sdata;
210 int erp, shift = 0, bitrate;
212 struct ieee80211_supported_band *sband;
214 sband = local->hw.wiphy->bands[frame_txctl->band];
216 short_preamble = false;
218 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
221 sdata = vif_to_sdata(vif);
222 short_preamble = sdata->vif.bss_conf.use_short_preamble;
223 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
224 erp = rate->flags & IEEE80211_RATE_ERP_G;
225 shift = ieee80211_vif_get_shift(vif);
228 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
230 /* Data frame duration */
231 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
232 erp, short_preamble, shift);
233 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
235 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
236 erp, short_preamble, shift);
239 return cpu_to_le16(dur);
241 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
243 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
245 struct ieee80211_local *local = sdata->local;
246 struct ieee80211_vif *vif = &sdata->vif;
247 struct fq *fq = &local->fq;
248 struct ps_data *ps = NULL;
249 struct txq_info *txqi;
250 struct sta_info *sta;
253 spin_lock_bh(&fq->lock);
255 if (sdata->vif.type == NL80211_IFTYPE_AP)
256 ps = &sdata->bss->ps;
258 sdata->vif.txqs_stopped[ac] = false;
260 list_for_each_entry_rcu(sta, &local->sta_list, list) {
261 if (sdata != sta->sdata)
264 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
265 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_bh(&fq->lock);
277 drv_wake_tx_queue(local, txqi);
278 spin_lock_bh(&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_bh(&fq->lock);
293 drv_wake_tx_queue(local, txqi);
296 spin_unlock_bh(&fq->lock);
299 void ieee80211_wake_txqs(unsigned long data)
301 struct ieee80211_local *local = (struct ieee80211_local *)data;
302 struct ieee80211_sub_if_data *sdata;
303 int n_acs = IEEE80211_NUM_ACS;
308 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
310 if (local->hw.queues < IEEE80211_NUM_ACS)
313 for (i = 0; i < local->hw.queues; i++) {
314 if (local->queue_stop_reasons[i])
317 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
318 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
321 for (ac = 0; ac < n_acs; ac++) {
322 int ac_queue = sdata->vif.hw_queue[ac];
325 sdata->vif.cab_queue == i)
326 __ieee80211_wake_txqs(sdata, ac);
329 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
332 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
336 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
338 struct ieee80211_sub_if_data *sdata;
339 int n_acs = IEEE80211_NUM_ACS;
341 if (local->ops->wake_tx_queue)
344 if (local->hw.queues < IEEE80211_NUM_ACS)
347 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
353 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
354 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
357 for (ac = 0; ac < n_acs; ac++) {
358 int ac_queue = sdata->vif.hw_queue[ac];
360 if (ac_queue == queue ||
361 (sdata->vif.cab_queue == queue &&
362 local->queue_stop_reasons[ac_queue] == 0 &&
363 skb_queue_empty(&local->pending[ac_queue])))
364 netif_wake_subqueue(sdata->dev, ac);
369 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
370 enum queue_stop_reason reason,
373 struct ieee80211_local *local = hw_to_local(hw);
375 trace_wake_queue(local, queue, reason);
377 if (WARN_ON(queue >= hw->queues))
380 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
384 local->q_stop_reasons[queue][reason] = 0;
386 local->q_stop_reasons[queue][reason]--;
387 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
388 local->q_stop_reasons[queue][reason] = 0;
391 if (local->q_stop_reasons[queue][reason] == 0)
392 __clear_bit(reason, &local->queue_stop_reasons[queue]);
394 if (local->queue_stop_reasons[queue] != 0)
395 /* someone still has this queue stopped */
398 if (skb_queue_empty(&local->pending[queue])) {
400 ieee80211_propagate_queue_wake(local, queue);
403 tasklet_schedule(&local->tx_pending_tasklet);
405 if (local->ops->wake_tx_queue)
406 tasklet_schedule(&local->wake_txqs_tasklet);
409 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
410 enum queue_stop_reason reason,
413 struct ieee80211_local *local = hw_to_local(hw);
416 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
417 __ieee80211_wake_queue(hw, queue, reason, refcounted);
418 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
421 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
423 ieee80211_wake_queue_by_reason(hw, queue,
424 IEEE80211_QUEUE_STOP_REASON_DRIVER,
427 EXPORT_SYMBOL(ieee80211_wake_queue);
429 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
430 enum queue_stop_reason reason,
433 struct ieee80211_local *local = hw_to_local(hw);
434 struct ieee80211_sub_if_data *sdata;
435 int n_acs = IEEE80211_NUM_ACS;
437 trace_stop_queue(local, queue, reason);
439 if (WARN_ON(queue >= hw->queues))
443 local->q_stop_reasons[queue][reason] = 1;
445 local->q_stop_reasons[queue][reason]++;
447 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
450 if (local->hw.queues < IEEE80211_NUM_ACS)
454 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
460 for (ac = 0; ac < n_acs; ac++) {
461 if (sdata->vif.hw_queue[ac] == queue ||
462 sdata->vif.cab_queue == queue) {
463 if (!local->ops->wake_tx_queue) {
464 netif_stop_subqueue(sdata->dev, ac);
467 spin_lock(&local->fq.lock);
468 sdata->vif.txqs_stopped[ac] = true;
469 spin_unlock(&local->fq.lock);
476 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
477 enum queue_stop_reason reason,
480 struct ieee80211_local *local = hw_to_local(hw);
483 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
484 __ieee80211_stop_queue(hw, queue, reason, refcounted);
485 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
488 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
490 ieee80211_stop_queue_by_reason(hw, queue,
491 IEEE80211_QUEUE_STOP_REASON_DRIVER,
494 EXPORT_SYMBOL(ieee80211_stop_queue);
496 void ieee80211_add_pending_skb(struct ieee80211_local *local,
499 struct ieee80211_hw *hw = &local->hw;
501 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
502 int queue = info->hw_queue;
504 if (WARN_ON(!info->control.vif)) {
505 ieee80211_free_txskb(&local->hw, skb);
509 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
510 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
512 __skb_queue_tail(&local->pending[queue], skb);
513 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
515 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
518 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
519 struct sk_buff_head *skbs)
521 struct ieee80211_hw *hw = &local->hw;
526 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
527 while ((skb = skb_dequeue(skbs))) {
528 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
530 if (WARN_ON(!info->control.vif)) {
531 ieee80211_free_txskb(&local->hw, skb);
535 queue = info->hw_queue;
537 __ieee80211_stop_queue(hw, queue,
538 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
541 __skb_queue_tail(&local->pending[queue], skb);
544 for (i = 0; i < hw->queues; i++)
545 __ieee80211_wake_queue(hw, i,
546 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
548 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
551 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
552 unsigned long queues,
553 enum queue_stop_reason reason,
556 struct ieee80211_local *local = hw_to_local(hw);
560 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
562 for_each_set_bit(i, &queues, hw->queues)
563 __ieee80211_stop_queue(hw, i, reason, refcounted);
565 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
568 void ieee80211_stop_queues(struct ieee80211_hw *hw)
570 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
571 IEEE80211_QUEUE_STOP_REASON_DRIVER,
574 EXPORT_SYMBOL(ieee80211_stop_queues);
576 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
578 struct ieee80211_local *local = hw_to_local(hw);
582 if (WARN_ON(queue >= hw->queues))
585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
586 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
587 &local->queue_stop_reasons[queue]);
588 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
591 EXPORT_SYMBOL(ieee80211_queue_stopped);
593 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
594 unsigned long queues,
595 enum queue_stop_reason reason,
598 struct ieee80211_local *local = hw_to_local(hw);
602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
604 for_each_set_bit(i, &queues, hw->queues)
605 __ieee80211_wake_queue(hw, i, reason, refcounted);
607 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
610 void ieee80211_wake_queues(struct ieee80211_hw *hw)
612 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
613 IEEE80211_QUEUE_STOP_REASON_DRIVER,
616 EXPORT_SYMBOL(ieee80211_wake_queues);
619 ieee80211_get_vif_queues(struct ieee80211_local *local,
620 struct ieee80211_sub_if_data *sdata)
624 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
629 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
630 queues |= BIT(sdata->vif.hw_queue[ac]);
631 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
632 queues |= BIT(sdata->vif.cab_queue);
635 queues = BIT(local->hw.queues) - 1;
641 void __ieee80211_flush_queues(struct ieee80211_local *local,
642 struct ieee80211_sub_if_data *sdata,
643 unsigned int queues, bool drop)
645 if (!local->ops->flush)
649 * If no queue was set, or if the HW doesn't support
650 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
652 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
653 queues = ieee80211_get_vif_queues(local, sdata);
655 ieee80211_stop_queues_by_reason(&local->hw, queues,
656 IEEE80211_QUEUE_STOP_REASON_FLUSH,
659 drv_flush(local, sdata, queues, drop);
661 ieee80211_wake_queues_by_reason(&local->hw, queues,
662 IEEE80211_QUEUE_STOP_REASON_FLUSH,
666 void ieee80211_flush_queues(struct ieee80211_local *local,
667 struct ieee80211_sub_if_data *sdata, bool drop)
669 __ieee80211_flush_queues(local, sdata, 0, drop);
672 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
673 struct ieee80211_sub_if_data *sdata,
674 enum queue_stop_reason reason)
676 ieee80211_stop_queues_by_reason(&local->hw,
677 ieee80211_get_vif_queues(local, sdata),
681 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
682 struct ieee80211_sub_if_data *sdata,
683 enum queue_stop_reason reason)
685 ieee80211_wake_queues_by_reason(&local->hw,
686 ieee80211_get_vif_queues(local, sdata),
690 static void __iterate_interfaces(struct ieee80211_local *local,
692 void (*iterator)(void *data, u8 *mac,
693 struct ieee80211_vif *vif),
696 struct ieee80211_sub_if_data *sdata;
697 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
699 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
700 switch (sdata->vif.type) {
701 case NL80211_IFTYPE_MONITOR:
702 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
705 case NL80211_IFTYPE_AP_VLAN:
710 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
711 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
713 if (ieee80211_sdata_running(sdata) || !active_only)
714 iterator(data, sdata->vif.addr,
718 sdata = rcu_dereference_check(local->monitor_sdata,
719 lockdep_is_held(&local->iflist_mtx) ||
720 lockdep_rtnl_is_held());
722 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
723 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
724 iterator(data, sdata->vif.addr, &sdata->vif);
727 void ieee80211_iterate_interfaces(
728 struct ieee80211_hw *hw, u32 iter_flags,
729 void (*iterator)(void *data, u8 *mac,
730 struct ieee80211_vif *vif),
733 struct ieee80211_local *local = hw_to_local(hw);
735 mutex_lock(&local->iflist_mtx);
736 __iterate_interfaces(local, iter_flags, iterator, data);
737 mutex_unlock(&local->iflist_mtx);
739 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
741 void ieee80211_iterate_active_interfaces_atomic(
742 struct ieee80211_hw *hw, u32 iter_flags,
743 void (*iterator)(void *data, u8 *mac,
744 struct ieee80211_vif *vif),
747 struct ieee80211_local *local = hw_to_local(hw);
750 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
754 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
756 void ieee80211_iterate_active_interfaces_rtnl(
757 struct ieee80211_hw *hw, u32 iter_flags,
758 void (*iterator)(void *data, u8 *mac,
759 struct ieee80211_vif *vif),
762 struct ieee80211_local *local = hw_to_local(hw);
766 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
769 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
771 static void __iterate_stations(struct ieee80211_local *local,
772 void (*iterator)(void *data,
773 struct ieee80211_sta *sta),
776 struct sta_info *sta;
778 list_for_each_entry_rcu(sta, &local->sta_list, list) {
782 iterator(data, &sta->sta);
786 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
787 void (*iterator)(void *data,
788 struct ieee80211_sta *sta),
791 struct ieee80211_local *local = hw_to_local(hw);
794 __iterate_stations(local, iterator, data);
797 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
799 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
801 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
803 if (!ieee80211_sdata_running(sdata) ||
804 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
808 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
810 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
812 struct ieee80211_sub_if_data *sdata;
817 sdata = vif_to_sdata(vif);
819 if (!ieee80211_sdata_running(sdata) ||
820 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
825 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
828 * Nothing should have been stuffed into the workqueue during
829 * the suspend->resume cycle. Since we can't check each caller
830 * of this function if we are already quiescing / suspended,
831 * check here and don't WARN since this can actually happen when
832 * the rx path (for example) is racing against __ieee80211_suspend
833 * and suspending / quiescing was set after the rx path checked
836 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
838 if (local->quiescing || (local->suspended && !local->resuming)) {
839 pr_warn("queueing ieee80211 work while going to suspend\n");
846 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
848 struct ieee80211_local *local = hw_to_local(hw);
850 if (!ieee80211_can_queue_work(local))
853 queue_work(local->workqueue, work);
855 EXPORT_SYMBOL(ieee80211_queue_work);
857 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
858 struct delayed_work *dwork,
861 struct ieee80211_local *local = hw_to_local(hw);
863 if (!ieee80211_can_queue_work(local))
866 queue_delayed_work(local->workqueue, dwork, delay);
868 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
870 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
871 struct ieee802_11_elems *elems,
875 const u8 *pos = start;
876 bool calc_crc = filter != 0;
877 DECLARE_BITMAP(seen_elems, 256);
880 bitmap_zero(seen_elems, 256);
881 memset(elems, 0, sizeof(*elems));
882 elems->ie_start = start;
883 elems->total_len = len;
887 bool elem_parse_failed;
894 elems->parse_error = true;
900 case WLAN_EID_SUPP_RATES:
901 case WLAN_EID_FH_PARAMS:
902 case WLAN_EID_DS_PARAMS:
903 case WLAN_EID_CF_PARAMS:
905 case WLAN_EID_IBSS_PARAMS:
906 case WLAN_EID_CHALLENGE:
908 case WLAN_EID_ERP_INFO:
909 case WLAN_EID_EXT_SUPP_RATES:
910 case WLAN_EID_HT_CAPABILITY:
911 case WLAN_EID_HT_OPERATION:
912 case WLAN_EID_VHT_CAPABILITY:
913 case WLAN_EID_VHT_OPERATION:
914 case WLAN_EID_MESH_ID:
915 case WLAN_EID_MESH_CONFIG:
916 case WLAN_EID_PEER_MGMT:
921 case WLAN_EID_CHANNEL_SWITCH:
922 case WLAN_EID_EXT_CHANSWITCH_ANN:
923 case WLAN_EID_COUNTRY:
924 case WLAN_EID_PWR_CONSTRAINT:
925 case WLAN_EID_TIMEOUT_INTERVAL:
926 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
927 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
928 case WLAN_EID_CHAN_SWITCH_PARAM:
929 case WLAN_EID_EXT_CAPABILITY:
930 case WLAN_EID_CHAN_SWITCH_TIMING:
931 case WLAN_EID_LINK_ID:
932 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
934 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
935 * that if the content gets bigger it might be needed more than once
937 if (test_bit(id, seen_elems)) {
938 elems->parse_error = true;
946 if (calc_crc && id < 64 && (filter & (1ULL << id)))
947 crc = crc32_be(crc, pos - 2, elen + 2);
949 elem_parse_failed = false;
952 case WLAN_EID_LINK_ID:
953 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
954 elem_parse_failed = true;
957 elems->lnk_id = (void *)(pos - 2);
959 case WLAN_EID_CHAN_SWITCH_TIMING:
960 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
961 elem_parse_failed = true;
964 elems->ch_sw_timing = (void *)pos;
966 case WLAN_EID_EXT_CAPABILITY:
967 elems->ext_capab = pos;
968 elems->ext_capab_len = elen;
972 elems->ssid_len = elen;
974 case WLAN_EID_SUPP_RATES:
975 elems->supp_rates = pos;
976 elems->supp_rates_len = elen;
978 case WLAN_EID_DS_PARAMS:
980 elems->ds_params = pos;
982 elem_parse_failed = true;
985 if (elen >= sizeof(struct ieee80211_tim_ie)) {
986 elems->tim = (void *)pos;
987 elems->tim_len = elen;
989 elem_parse_failed = true;
991 case WLAN_EID_CHALLENGE:
992 elems->challenge = pos;
993 elems->challenge_len = elen;
995 case WLAN_EID_VENDOR_SPECIFIC:
996 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
998 /* Microsoft OUI (00:50:F2) */
1001 crc = crc32_be(crc, pos - 2, elen + 2);
1003 if (elen >= 5 && pos[3] == 2) {
1004 /* OUI Type 2 - WMM IE */
1006 elems->wmm_info = pos;
1007 elems->wmm_info_len = elen;
1008 } else if (pos[4] == 1) {
1009 elems->wmm_param = pos;
1010 elems->wmm_param_len = elen;
1017 elems->rsn_len = elen;
1019 case WLAN_EID_ERP_INFO:
1021 elems->erp_info = pos;
1023 elem_parse_failed = true;
1025 case WLAN_EID_EXT_SUPP_RATES:
1026 elems->ext_supp_rates = pos;
1027 elems->ext_supp_rates_len = elen;
1029 case WLAN_EID_HT_CAPABILITY:
1030 if (elen >= sizeof(struct ieee80211_ht_cap))
1031 elems->ht_cap_elem = (void *)pos;
1033 elem_parse_failed = true;
1035 case WLAN_EID_HT_OPERATION:
1036 if (elen >= sizeof(struct ieee80211_ht_operation))
1037 elems->ht_operation = (void *)pos;
1039 elem_parse_failed = true;
1041 case WLAN_EID_VHT_CAPABILITY:
1042 if (elen >= sizeof(struct ieee80211_vht_cap))
1043 elems->vht_cap_elem = (void *)pos;
1045 elem_parse_failed = true;
1047 case WLAN_EID_VHT_OPERATION:
1048 if (elen >= sizeof(struct ieee80211_vht_operation))
1049 elems->vht_operation = (void *)pos;
1051 elem_parse_failed = true;
1053 case WLAN_EID_OPMODE_NOTIF:
1055 elems->opmode_notif = pos;
1057 elem_parse_failed = true;
1059 case WLAN_EID_MESH_ID:
1060 elems->mesh_id = pos;
1061 elems->mesh_id_len = elen;
1063 case WLAN_EID_MESH_CONFIG:
1064 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1065 elems->mesh_config = (void *)pos;
1067 elem_parse_failed = true;
1069 case WLAN_EID_PEER_MGMT:
1070 elems->peering = pos;
1071 elems->peering_len = elen;
1073 case WLAN_EID_MESH_AWAKE_WINDOW:
1075 elems->awake_window = (void *)pos;
1079 elems->preq_len = elen;
1083 elems->prep_len = elen;
1087 elems->perr_len = elen;
1090 if (elen >= sizeof(struct ieee80211_rann_ie))
1091 elems->rann = (void *)pos;
1093 elem_parse_failed = true;
1095 case WLAN_EID_CHANNEL_SWITCH:
1096 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1097 elem_parse_failed = true;
1100 elems->ch_switch_ie = (void *)pos;
1102 case WLAN_EID_EXT_CHANSWITCH_ANN:
1103 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1104 elem_parse_failed = true;
1107 elems->ext_chansw_ie = (void *)pos;
1109 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1110 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1111 elem_parse_failed = true;
1114 elems->sec_chan_offs = (void *)pos;
1116 case WLAN_EID_CHAN_SWITCH_PARAM:
1118 sizeof(*elems->mesh_chansw_params_ie)) {
1119 elem_parse_failed = true;
1122 elems->mesh_chansw_params_ie = (void *)pos;
1124 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1126 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1127 elem_parse_failed = true;
1130 elems->wide_bw_chansw_ie = (void *)pos;
1132 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1134 elem_parse_failed = true;
1138 * This is a bit tricky, but as we only care about
1139 * the wide bandwidth channel switch element, so
1140 * just parse it out manually.
1142 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1145 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1146 elems->wide_bw_chansw_ie =
1149 elem_parse_failed = true;
1152 case WLAN_EID_COUNTRY:
1153 elems->country_elem = pos;
1154 elems->country_elem_len = elen;
1156 case WLAN_EID_PWR_CONSTRAINT:
1158 elem_parse_failed = true;
1161 elems->pwr_constr_elem = pos;
1163 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1164 /* Lots of different options exist, but we only care
1165 * about the Dynamic Transmit Power Control element.
1166 * First check for the Cisco OUI, then for the DTPC
1170 elem_parse_failed = true;
1174 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1175 pos[2] != 0x96 || pos[3] != 0x00)
1179 elem_parse_failed = true;
1184 crc = crc32_be(crc, pos - 2, elen + 2);
1186 elems->cisco_dtpc_elem = pos;
1188 case WLAN_EID_TIMEOUT_INTERVAL:
1189 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1190 elems->timeout_int = (void *)pos;
1192 elem_parse_failed = true;
1194 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1195 if (elen >= sizeof(*elems->max_idle_period_ie))
1196 elems->max_idle_period_ie = (void *)pos;
1198 case WLAN_EID_EXTENSION:
1199 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1200 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1201 elems->mu_edca_param_set = (void *)&pos[1];
1202 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1203 elems->he_cap = (void *)&pos[1];
1204 elems->he_cap_len = elen - 1;
1205 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1206 elen >= sizeof(*elems->he_operation) &&
1207 elen >= ieee80211_he_oper_size(&pos[1])) {
1208 elems->he_operation = (void *)&pos[1];
1209 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1210 elems->uora_element = (void *)&pos[1];
1217 if (elem_parse_failed)
1218 elems->parse_error = true;
1220 __set_bit(id, seen_elems);
1227 elems->parse_error = true;
1232 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1233 struct ieee80211_tx_queue_params
1236 struct ieee80211_chanctx_conf *chanctx_conf;
1237 const struct ieee80211_reg_rule *rrule;
1238 const struct ieee80211_wmm_ac *wmm_ac;
1239 u16 center_freq = 0;
1241 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1242 sdata->vif.type != NL80211_IFTYPE_STATION)
1246 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1248 center_freq = chanctx_conf->def.chan->center_freq;
1255 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1257 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1262 if (sdata->vif.type == NL80211_IFTYPE_AP)
1263 wmm_ac = &rrule->wmm_rule.ap[ac];
1265 wmm_ac = &rrule->wmm_rule.client[ac];
1266 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1267 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1268 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1269 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1273 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1274 bool bss_notify, bool enable_qos)
1276 struct ieee80211_local *local = sdata->local;
1277 struct ieee80211_tx_queue_params qparam;
1278 struct ieee80211_chanctx_conf *chanctx_conf;
1281 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1284 if (!local->ops->conf_tx)
1287 if (local->hw.queues < IEEE80211_NUM_ACS)
1290 memset(&qparam, 0, sizeof(qparam));
1293 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1294 use_11b = (chanctx_conf &&
1295 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1296 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1299 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1301 /* Set defaults according to 802.11-2007 Table 7-37 */
1308 /* Confiure old 802.11b/g medium access rules. */
1309 qparam.cw_max = aCWmax;
1310 qparam.cw_min = aCWmin;
1314 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1315 /* Update if QoS is enabled. */
1318 case IEEE80211_AC_BK:
1319 qparam.cw_max = aCWmax;
1320 qparam.cw_min = aCWmin;
1327 /* never happens but let's not leave undefined */
1329 case IEEE80211_AC_BE:
1330 qparam.cw_max = aCWmax;
1331 qparam.cw_min = aCWmin;
1338 case IEEE80211_AC_VI:
1339 qparam.cw_max = aCWmin;
1340 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1344 qparam.txop = 6016/32;
1346 qparam.txop = 3008/32;
1353 case IEEE80211_AC_VO:
1354 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1355 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1359 qparam.txop = 3264/32;
1361 qparam.txop = 1504/32;
1366 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1368 qparam.uapsd = false;
1370 sdata->tx_conf[ac] = qparam;
1371 drv_conf_tx(local, sdata, ac, &qparam);
1374 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1375 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1376 sdata->vif.type != NL80211_IFTYPE_NAN) {
1377 sdata->vif.bss_conf.qos = enable_qos;
1379 ieee80211_bss_info_change_notify(sdata,
1384 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1385 u16 transaction, u16 auth_alg, u16 status,
1386 const u8 *extra, size_t extra_len, const u8 *da,
1387 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1390 struct ieee80211_local *local = sdata->local;
1391 struct sk_buff *skb;
1392 struct ieee80211_mgmt *mgmt;
1395 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1396 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1397 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1401 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1403 mgmt = skb_put_zero(skb, 24 + 6);
1404 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1405 IEEE80211_STYPE_AUTH);
1406 memcpy(mgmt->da, da, ETH_ALEN);
1407 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1408 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1409 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1410 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1411 mgmt->u.auth.status_code = cpu_to_le16(status);
1413 skb_put_data(skb, extra, extra_len);
1415 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1416 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1417 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1421 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1423 ieee80211_tx_skb(sdata, skb);
1426 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1427 const u8 *bssid, u16 stype, u16 reason,
1428 bool send_frame, u8 *frame_buf)
1430 struct ieee80211_local *local = sdata->local;
1431 struct sk_buff *skb;
1432 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1435 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1436 mgmt->duration = 0; /* initialize only */
1437 mgmt->seq_ctrl = 0; /* initialize only */
1438 memcpy(mgmt->da, bssid, ETH_ALEN);
1439 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1440 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1441 /* u.deauth.reason_code == u.disassoc.reason_code */
1442 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1445 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1446 IEEE80211_DEAUTH_FRAME_LEN);
1450 skb_reserve(skb, local->hw.extra_tx_headroom);
1453 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1455 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1456 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1457 IEEE80211_SKB_CB(skb)->flags |=
1458 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1460 ieee80211_tx_skb(sdata, skb);
1464 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1465 u8 *buffer, size_t buffer_len,
1466 const u8 *ie, size_t ie_len,
1467 enum nl80211_band band,
1469 struct cfg80211_chan_def *chandef,
1470 size_t *offset, u32 flags)
1472 struct ieee80211_supported_band *sband;
1473 const struct ieee80211_sta_he_cap *he_cap;
1474 u8 *pos = buffer, *end = buffer + buffer_len;
1476 int supp_rates_len, i;
1482 bool have_80mhz = false;
1486 sband = local->hw.wiphy->bands[band];
1487 if (WARN_ON_ONCE(!sband))
1490 rate_flags = ieee80211_chandef_rate_flags(chandef);
1491 shift = ieee80211_chandef_get_shift(chandef);
1494 for (i = 0; i < sband->n_bitrates; i++) {
1495 if ((BIT(i) & rate_mask) == 0)
1496 continue; /* skip rate */
1497 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1500 rates[num_rates++] =
1501 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1505 supp_rates_len = min_t(int, num_rates, 8);
1507 if (end - pos < 2 + supp_rates_len)
1509 *pos++ = WLAN_EID_SUPP_RATES;
1510 *pos++ = supp_rates_len;
1511 memcpy(pos, rates, supp_rates_len);
1512 pos += supp_rates_len;
1514 /* insert "request information" if in custom IEs */
1516 static const u8 before_extrates[] = {
1518 WLAN_EID_SUPP_RATES,
1521 noffset = ieee80211_ie_split(ie, ie_len,
1523 ARRAY_SIZE(before_extrates),
1525 if (end - pos < noffset - *offset)
1527 memcpy(pos, ie + *offset, noffset - *offset);
1528 pos += noffset - *offset;
1532 ext_rates_len = num_rates - supp_rates_len;
1533 if (ext_rates_len > 0) {
1534 if (end - pos < 2 + ext_rates_len)
1536 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1537 *pos++ = ext_rates_len;
1538 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1539 pos += ext_rates_len;
1542 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1545 *pos++ = WLAN_EID_DS_PARAMS;
1547 *pos++ = ieee80211_frequency_to_channel(
1548 chandef->chan->center_freq);
1551 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1554 /* insert custom IEs that go before HT */
1556 static const u8 before_ht[] = {
1558 * no need to list the ones split off already
1559 * (or generated here)
1562 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1564 noffset = ieee80211_ie_split(ie, ie_len,
1565 before_ht, ARRAY_SIZE(before_ht),
1567 if (end - pos < noffset - *offset)
1569 memcpy(pos, ie + *offset, noffset - *offset);
1570 pos += noffset - *offset;
1574 if (sband->ht_cap.ht_supported) {
1575 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1577 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1581 /* insert custom IEs that go before VHT */
1583 static const u8 before_vht[] = {
1585 * no need to list the ones split off already
1586 * (or generated here)
1588 WLAN_EID_BSS_COEX_2040,
1589 WLAN_EID_EXT_CAPABILITY,
1591 WLAN_EID_CHANNEL_USAGE,
1592 WLAN_EID_INTERWORKING,
1594 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1596 noffset = ieee80211_ie_split(ie, ie_len,
1597 before_vht, ARRAY_SIZE(before_vht),
1599 if (end - pos < noffset - *offset)
1601 memcpy(pos, ie + *offset, noffset - *offset);
1602 pos += noffset - *offset;
1606 /* Check if any channel in this sband supports at least 80 MHz */
1607 for (i = 0; i < sband->n_channels; i++) {
1608 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1609 IEEE80211_CHAN_NO_80MHZ))
1616 if (sband->vht_cap.vht_supported && have_80mhz) {
1617 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1619 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1620 sband->vht_cap.cap);
1623 /* insert custom IEs that go before HE */
1625 static const u8 before_he[] = {
1627 * no need to list the ones split off before VHT
1630 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1632 /* TODO: add 11ah/11aj/11ak elements */
1634 noffset = ieee80211_ie_split(ie, ie_len,
1635 before_he, ARRAY_SIZE(before_he),
1637 if (end - pos < noffset - *offset)
1639 memcpy(pos, ie + *offset, noffset - *offset);
1640 pos += noffset - *offset;
1644 he_cap = ieee80211_get_he_sta_cap(sband);
1646 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1652 * If adding more here, adjust code in main.c
1653 * that calculates local->scan_ies_len.
1656 return pos - buffer;
1658 WARN_ONCE(1, "not enough space for preq IEs\n");
1660 return pos - buffer;
1663 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1665 struct ieee80211_scan_ies *ie_desc,
1666 const u8 *ie, size_t ie_len,
1667 u8 bands_used, u32 *rate_masks,
1668 struct cfg80211_chan_def *chandef,
1671 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1674 memset(ie_desc, 0, sizeof(*ie_desc));
1676 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1677 if (bands_used & BIT(i)) {
1678 pos += ieee80211_build_preq_ies_band(local,
1686 ie_desc->ies[i] = buffer + old_pos;
1687 ie_desc->len[i] = pos - old_pos;
1692 /* add any remaining custom IEs */
1694 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1695 "not enough space for preq custom IEs\n"))
1697 memcpy(buffer + pos, ie + custom_ie_offset,
1698 ie_len - custom_ie_offset);
1699 ie_desc->common_ies = buffer + pos;
1700 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1701 pos += ie_len - custom_ie_offset;
1707 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1708 const u8 *src, const u8 *dst,
1710 struct ieee80211_channel *chan,
1711 const u8 *ssid, size_t ssid_len,
1712 const u8 *ie, size_t ie_len,
1715 struct ieee80211_local *local = sdata->local;
1716 struct cfg80211_chan_def chandef;
1717 struct sk_buff *skb;
1718 struct ieee80211_mgmt *mgmt;
1720 u32 rate_masks[NUM_NL80211_BANDS] = {};
1721 struct ieee80211_scan_ies dummy_ie_desc;
1724 * Do not send DS Channel parameter for directed probe requests
1725 * in order to maximize the chance that we get a response. Some
1726 * badly-behaved APs don't respond when this parameter is included.
1728 chandef.width = sdata->vif.bss_conf.chandef.width;
1729 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1730 chandef.chan = NULL;
1732 chandef.chan = chan;
1734 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1739 rate_masks[chan->band] = ratemask;
1740 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1741 skb_tailroom(skb), &dummy_ie_desc,
1742 ie, ie_len, BIT(chan->band),
1743 rate_masks, &chandef, flags);
1744 skb_put(skb, ies_len);
1747 mgmt = (struct ieee80211_mgmt *) skb->data;
1748 memcpy(mgmt->da, dst, ETH_ALEN);
1749 memcpy(mgmt->bssid, dst, ETH_ALEN);
1752 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1757 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1758 struct ieee802_11_elems *elems,
1759 enum nl80211_band band, u32 *basic_rates)
1761 struct ieee80211_supported_band *sband;
1763 u32 supp_rates, rate_flags;
1766 sband = sdata->local->hw.wiphy->bands[band];
1767 if (WARN_ON(!sband))
1770 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1771 shift = ieee80211_vif_get_shift(&sdata->vif);
1773 num_rates = sband->n_bitrates;
1775 for (i = 0; i < elems->supp_rates_len +
1776 elems->ext_supp_rates_len; i++) {
1780 if (i < elems->supp_rates_len)
1781 rate = elems->supp_rates[i];
1782 else if (elems->ext_supp_rates)
1783 rate = elems->ext_supp_rates
1784 [i - elems->supp_rates_len];
1785 own_rate = 5 * (rate & 0x7f);
1786 is_basic = !!(rate & 0x80);
1788 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1791 for (j = 0; j < num_rates; j++) {
1793 if ((rate_flags & sband->bitrates[j].flags)
1797 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1800 if (brate == own_rate) {
1801 supp_rates |= BIT(j);
1802 if (basic_rates && is_basic)
1803 *basic_rates |= BIT(j);
1810 void ieee80211_stop_device(struct ieee80211_local *local)
1812 ieee80211_led_radio(local, false);
1813 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1815 cancel_work_sync(&local->reconfig_filter);
1817 flush_workqueue(local->workqueue);
1821 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1824 /* It's possible that we don't handle the scan completion in
1825 * time during suspend, so if it's still marked as completed
1826 * here, queue the work and flush it to clean things up.
1827 * Instead of calling the worker function directly here, we
1828 * really queue it to avoid potential races with other flows
1829 * scheduling the same work.
1831 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1832 /* If coming from reconfiguration failure, abort the scan so
1833 * we don't attempt to continue a partial HW scan - which is
1834 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1835 * completed scan, and a 5 GHz portion is still pending.
1838 set_bit(SCAN_ABORTED, &local->scanning);
1839 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1840 flush_delayed_work(&local->scan_work);
1844 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1846 struct ieee80211_sub_if_data *sdata;
1847 struct ieee80211_chanctx *ctx;
1850 * We get here if during resume the device can't be restarted properly.
1851 * We might also get here if this happens during HW reset, which is a
1852 * slightly different situation and we need to drop all connections in
1855 * Ask cfg80211 to turn off all interfaces, this will result in more
1856 * warnings but at least we'll then get into a clean stopped state.
1859 local->resuming = false;
1860 local->suspended = false;
1861 local->in_reconfig = false;
1863 ieee80211_flush_completed_scan(local, true);
1865 /* scheduled scan clearly can't be running any more, but tell
1866 * cfg80211 and clear local state
1868 ieee80211_sched_scan_end(local);
1870 list_for_each_entry(sdata, &local->interfaces, list)
1871 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1873 /* Mark channel contexts as not being in the driver any more to avoid
1874 * removing them from the driver during the shutdown process...
1876 mutex_lock(&local->chanctx_mtx);
1877 list_for_each_entry(ctx, &local->chanctx_list, list)
1878 ctx->driver_present = false;
1879 mutex_unlock(&local->chanctx_mtx);
1881 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1884 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1885 struct ieee80211_sub_if_data *sdata)
1887 struct ieee80211_chanctx_conf *conf;
1888 struct ieee80211_chanctx *ctx;
1890 if (!local->use_chanctx)
1893 mutex_lock(&local->chanctx_mtx);
1894 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1895 lockdep_is_held(&local->chanctx_mtx));
1897 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1898 drv_assign_vif_chanctx(local, sdata, ctx);
1900 mutex_unlock(&local->chanctx_mtx);
1903 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1905 struct ieee80211_local *local = sdata->local;
1906 struct sta_info *sta;
1909 mutex_lock(&local->sta_mtx);
1910 list_for_each_entry(sta, &local->sta_list, list) {
1911 enum ieee80211_sta_state state;
1913 if (!sta->uploaded || sta->sdata != sdata)
1916 for (state = IEEE80211_STA_NOTEXIST;
1917 state < sta->sta_state; state++)
1918 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1921 mutex_unlock(&local->sta_mtx);
1924 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1926 struct cfg80211_nan_func *func, **funcs;
1929 res = drv_start_nan(sdata->local, sdata,
1930 &sdata->u.nan.conf);
1934 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1940 /* Add all the functions:
1941 * This is a little bit ugly. We need to call a potentially sleeping
1942 * callback for each NAN function, so we can't hold the spinlock.
1944 spin_lock_bh(&sdata->u.nan.func_lock);
1946 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1949 spin_unlock_bh(&sdata->u.nan.func_lock);
1951 for (i = 0; funcs[i]; i++) {
1952 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1954 ieee80211_nan_func_terminated(&sdata->vif,
1955 funcs[i]->instance_id,
1956 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1965 int ieee80211_reconfig(struct ieee80211_local *local)
1967 struct ieee80211_hw *hw = &local->hw;
1968 struct ieee80211_sub_if_data *sdata;
1969 struct ieee80211_chanctx *ctx;
1970 struct sta_info *sta;
1972 bool reconfig_due_to_wowlan = false;
1973 struct ieee80211_sub_if_data *sched_scan_sdata;
1974 struct cfg80211_sched_scan_request *sched_scan_req;
1975 bool sched_scan_stopped = false;
1976 bool suspended = local->suspended;
1978 /* nothing to do if HW shouldn't run */
1979 if (!local->open_count)
1984 local->resuming = true;
1986 if (local->wowlan) {
1988 * In the wowlan case, both mac80211 and the device
1989 * are functional when the resume op is called, so
1990 * clear local->suspended so the device could operate
1991 * normally (e.g. pass rx frames).
1993 local->suspended = false;
1994 res = drv_resume(local);
1995 local->wowlan = false;
1997 local->resuming = false;
2004 * res is 1, which means the driver requested
2005 * to go through a regular reset on wakeup.
2006 * restore local->suspended in this case.
2008 reconfig_due_to_wowlan = true;
2009 local->suspended = true;
2014 * In case of hw_restart during suspend (without wowlan),
2015 * cancel restart work, as we are reconfiguring the device
2017 * Note that restart_work is scheduled on a frozen workqueue,
2018 * so we can't deadlock in this case.
2020 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2021 cancel_work_sync(&local->restart_work);
2023 local->started = false;
2026 * Upon resume hardware can sometimes be goofy due to
2027 * various platform / driver / bus issues, so restarting
2028 * the device may at times not work immediately. Propagate
2031 res = drv_start(local);
2034 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2036 WARN(1, "Hardware became unavailable during restart.\n");
2037 ieee80211_handle_reconfig_failure(local);
2041 /* setup fragmentation threshold */
2042 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2044 /* setup RTS threshold */
2045 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2047 /* reset coverage class */
2048 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2050 ieee80211_led_radio(local, true);
2051 ieee80211_mod_tpt_led_trig(local,
2052 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2054 /* add interfaces */
2055 sdata = rtnl_dereference(local->monitor_sdata);
2057 /* in HW restart it exists already */
2058 WARN_ON(local->resuming);
2059 res = drv_add_interface(local, sdata);
2061 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2067 list_for_each_entry(sdata, &local->interfaces, list) {
2068 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2069 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2070 ieee80211_sdata_running(sdata)) {
2071 res = drv_add_interface(local, sdata);
2077 /* If adding any of the interfaces failed above, roll back and
2081 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2083 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2084 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2085 ieee80211_sdata_running(sdata))
2086 drv_remove_interface(local, sdata);
2087 ieee80211_handle_reconfig_failure(local);
2091 /* add channel contexts */
2092 if (local->use_chanctx) {
2093 mutex_lock(&local->chanctx_mtx);
2094 list_for_each_entry(ctx, &local->chanctx_list, list)
2095 if (ctx->replace_state !=
2096 IEEE80211_CHANCTX_REPLACES_OTHER)
2097 WARN_ON(drv_add_chanctx(local, ctx));
2098 mutex_unlock(&local->chanctx_mtx);
2100 sdata = rtnl_dereference(local->monitor_sdata);
2101 if (sdata && ieee80211_sdata_running(sdata))
2102 ieee80211_assign_chanctx(local, sdata);
2105 /* reconfigure hardware */
2106 ieee80211_hw_config(local, ~0);
2108 ieee80211_configure_filter(local);
2110 /* Finally also reconfigure all the BSS information */
2111 list_for_each_entry(sdata, &local->interfaces, list) {
2114 if (!ieee80211_sdata_running(sdata))
2117 ieee80211_assign_chanctx(local, sdata);
2119 switch (sdata->vif.type) {
2120 case NL80211_IFTYPE_AP_VLAN:
2121 case NL80211_IFTYPE_MONITOR:
2124 ieee80211_reconfig_stations(sdata);
2126 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2127 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2128 drv_conf_tx(local, sdata, i,
2129 &sdata->tx_conf[i]);
2133 /* common change flags for all interface types */
2134 changed = BSS_CHANGED_ERP_CTS_PROT |
2135 BSS_CHANGED_ERP_PREAMBLE |
2136 BSS_CHANGED_ERP_SLOT |
2138 BSS_CHANGED_BASIC_RATES |
2139 BSS_CHANGED_BEACON_INT |
2144 BSS_CHANGED_TXPOWER |
2145 BSS_CHANGED_MCAST_RATE;
2147 if (sdata->vif.mu_mimo_owner)
2148 changed |= BSS_CHANGED_MU_GROUPS;
2150 switch (sdata->vif.type) {
2151 case NL80211_IFTYPE_STATION:
2152 changed |= BSS_CHANGED_ASSOC |
2153 BSS_CHANGED_ARP_FILTER |
2156 /* Re-send beacon info report to the driver */
2157 if (sdata->u.mgd.have_beacon)
2158 changed |= BSS_CHANGED_BEACON_INFO;
2160 if (sdata->vif.bss_conf.max_idle_period ||
2161 sdata->vif.bss_conf.protected_keep_alive)
2162 changed |= BSS_CHANGED_KEEP_ALIVE;
2165 ieee80211_bss_info_change_notify(sdata, changed);
2166 sdata_unlock(sdata);
2168 case NL80211_IFTYPE_OCB:
2169 changed |= BSS_CHANGED_OCB;
2170 ieee80211_bss_info_change_notify(sdata, changed);
2172 case NL80211_IFTYPE_ADHOC:
2173 changed |= BSS_CHANGED_IBSS;
2175 case NL80211_IFTYPE_AP:
2176 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2178 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2179 changed |= BSS_CHANGED_AP_PROBE_RESP;
2181 if (rcu_access_pointer(sdata->u.ap.beacon))
2182 drv_start_ap(local, sdata);
2186 case NL80211_IFTYPE_MESH_POINT:
2187 if (sdata->vif.bss_conf.enable_beacon) {
2188 changed |= BSS_CHANGED_BEACON |
2189 BSS_CHANGED_BEACON_ENABLED;
2190 ieee80211_bss_info_change_notify(sdata, changed);
2193 case NL80211_IFTYPE_NAN:
2194 res = ieee80211_reconfig_nan(sdata);
2196 ieee80211_handle_reconfig_failure(local);
2200 case NL80211_IFTYPE_WDS:
2201 case NL80211_IFTYPE_AP_VLAN:
2202 case NL80211_IFTYPE_MONITOR:
2203 case NL80211_IFTYPE_P2P_DEVICE:
2206 case NL80211_IFTYPE_UNSPECIFIED:
2207 case NUM_NL80211_IFTYPES:
2208 case NL80211_IFTYPE_P2P_CLIENT:
2209 case NL80211_IFTYPE_P2P_GO:
2215 ieee80211_recalc_ps(local);
2218 * The sta might be in psm against the ap (e.g. because
2219 * this was the state before a hw restart), so we
2220 * explicitly send a null packet in order to make sure
2221 * it'll sync against the ap (and get out of psm).
2223 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2224 list_for_each_entry(sdata, &local->interfaces, list) {
2225 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2227 if (!sdata->u.mgd.associated)
2230 ieee80211_send_nullfunc(local, sdata, false);
2234 /* APs are now beaconing, add back stations */
2235 mutex_lock(&local->sta_mtx);
2236 list_for_each_entry(sta, &local->sta_list, list) {
2237 enum ieee80211_sta_state state;
2242 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2243 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2246 for (state = IEEE80211_STA_NOTEXIST;
2247 state < sta->sta_state; state++)
2248 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2251 mutex_unlock(&local->sta_mtx);
2254 list_for_each_entry(sdata, &local->interfaces, list)
2255 ieee80211_reset_crypto_tx_tailroom(sdata);
2257 list_for_each_entry(sdata, &local->interfaces, list)
2258 if (ieee80211_sdata_running(sdata))
2259 ieee80211_enable_keys(sdata);
2261 /* Reconfigure sched scan if it was interrupted by FW restart */
2262 mutex_lock(&local->mtx);
2263 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2264 lockdep_is_held(&local->mtx));
2265 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2266 lockdep_is_held(&local->mtx));
2267 if (sched_scan_sdata && sched_scan_req)
2269 * Sched scan stopped, but we don't want to report it. Instead,
2270 * we're trying to reschedule. However, if more than one scan
2271 * plan was set, we cannot reschedule since we don't know which
2272 * scan plan was currently running (and some scan plans may have
2273 * already finished).
2275 if (sched_scan_req->n_scan_plans > 1 ||
2276 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2278 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2279 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2280 sched_scan_stopped = true;
2282 mutex_unlock(&local->mtx);
2284 if (sched_scan_stopped)
2285 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2289 if (local->monitors == local->open_count && local->monitors > 0)
2290 ieee80211_add_virtual_monitor(local);
2293 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2294 * sessions can be established after a resume.
2296 * Also tear down aggregation sessions since reconfiguring
2297 * them in a hardware restart scenario is not easily done
2298 * right now, and the hardware will have lost information
2299 * about the sessions, but we and the AP still think they
2300 * are active. This is really a workaround though.
2302 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2303 mutex_lock(&local->sta_mtx);
2305 list_for_each_entry(sta, &local->sta_list, list) {
2306 if (!local->resuming)
2307 ieee80211_sta_tear_down_BA_sessions(
2308 sta, AGG_STOP_LOCAL_REQUEST);
2309 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2312 mutex_unlock(&local->sta_mtx);
2315 if (local->in_reconfig) {
2316 local->in_reconfig = false;
2319 /* Restart deferred ROCs */
2320 mutex_lock(&local->mtx);
2321 ieee80211_start_next_roc(local);
2322 mutex_unlock(&local->mtx);
2325 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2326 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2330 * If this is for hw restart things are still running.
2331 * We may want to change that later, however.
2333 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2334 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2340 /* first set suspended false, then resuming */
2341 local->suspended = false;
2343 local->resuming = false;
2345 ieee80211_flush_completed_scan(local, false);
2347 if (local->open_count && !reconfig_due_to_wowlan)
2348 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2350 list_for_each_entry(sdata, &local->interfaces, list) {
2351 if (!ieee80211_sdata_running(sdata))
2353 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2354 ieee80211_sta_restart(sdata);
2357 mod_timer(&local->sta_cleanup, jiffies + 1);
2365 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2367 struct ieee80211_sub_if_data *sdata;
2368 struct ieee80211_local *local;
2369 struct ieee80211_key *key;
2374 sdata = vif_to_sdata(vif);
2375 local = sdata->local;
2377 if (WARN_ON(!local->resuming))
2380 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2383 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2385 mutex_lock(&local->key_mtx);
2386 list_for_each_entry(key, &sdata->key_list, list)
2387 key->flags |= KEY_FLAG_TAINTED;
2388 mutex_unlock(&local->key_mtx);
2390 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2392 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2394 struct ieee80211_local *local = sdata->local;
2395 struct ieee80211_chanctx_conf *chanctx_conf;
2396 struct ieee80211_chanctx *chanctx;
2398 mutex_lock(&local->chanctx_mtx);
2400 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2401 lockdep_is_held(&local->chanctx_mtx));
2404 * This function can be called from a work, thus it may be possible
2405 * that the chanctx_conf is removed (due to a disconnection, for
2407 * So nothing should be done in such case.
2412 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2413 ieee80211_recalc_smps_chanctx(local, chanctx);
2415 mutex_unlock(&local->chanctx_mtx);
2418 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2420 struct ieee80211_local *local = sdata->local;
2421 struct ieee80211_chanctx_conf *chanctx_conf;
2422 struct ieee80211_chanctx *chanctx;
2424 mutex_lock(&local->chanctx_mtx);
2426 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2427 lockdep_is_held(&local->chanctx_mtx));
2429 if (WARN_ON_ONCE(!chanctx_conf))
2432 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2433 ieee80211_recalc_chanctx_min_def(local, chanctx);
2435 mutex_unlock(&local->chanctx_mtx);
2438 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2440 size_t pos = offset;
2442 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2443 pos += 2 + ies[pos + 1];
2448 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2452 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2454 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2458 * Scale up threshold values before storing it, as the RSSI averaging
2459 * algorithm uses a scaled up value as well. Change this scaling
2460 * factor if the RSSI averaging algorithm changes.
2462 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2463 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2466 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2470 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2472 WARN_ON(rssi_min_thold == rssi_max_thold ||
2473 rssi_min_thold > rssi_max_thold);
2475 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2478 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2480 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2482 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2484 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2486 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2488 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2493 *pos++ = WLAN_EID_HT_CAPABILITY;
2494 *pos++ = sizeof(struct ieee80211_ht_cap);
2495 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2497 /* capability flags */
2498 tmp = cpu_to_le16(cap);
2499 memcpy(pos, &tmp, sizeof(u16));
2502 /* AMPDU parameters */
2503 *pos++ = ht_cap->ampdu_factor |
2504 (ht_cap->ampdu_density <<
2505 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2508 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2509 pos += sizeof(ht_cap->mcs);
2511 /* extended capabilities */
2512 pos += sizeof(__le16);
2514 /* BF capabilities */
2515 pos += sizeof(__le32);
2517 /* antenna selection */
2523 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2528 *pos++ = WLAN_EID_VHT_CAPABILITY;
2529 *pos++ = sizeof(struct ieee80211_vht_cap);
2530 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2532 /* capability flags */
2533 tmp = cpu_to_le32(cap);
2534 memcpy(pos, &tmp, sizeof(u32));
2538 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2539 pos += sizeof(vht_cap->vht_mcs);
2544 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2545 const struct ieee80211_sta_he_cap *he_cap,
2552 /* Make sure we have place for the IE */
2554 * TODO: the 1 added is because this temporarily is under the EXTENSION
2555 * IE. Get rid of it when it moves.
2560 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2562 sizeof(he_cap->he_cap_elem) + n +
2563 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2564 he_cap->he_cap_elem.phy_cap_info);
2566 if ((end - pos) < ie_len)
2569 *pos++ = WLAN_EID_EXTENSION;
2570 pos++; /* We'll set the size later below */
2571 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2574 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2575 pos += sizeof(he_cap->he_cap_elem);
2577 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2580 /* Check if PPE Threshold should be present */
2581 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2582 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2586 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2587 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2589 n = hweight8(he_cap->ppe_thres[0] &
2590 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2591 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2592 IEEE80211_PPE_THRES_NSS_POS));
2595 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2598 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2599 n = DIV_ROUND_UP(n, 8);
2601 /* Copy PPE Thresholds */
2602 memcpy(pos, &he_cap->ppe_thres, n);
2606 orig_pos[1] = (pos - orig_pos) - 2;
2610 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2611 const struct cfg80211_chan_def *chandef,
2612 u16 prot_mode, bool rifs_mode)
2614 struct ieee80211_ht_operation *ht_oper;
2615 /* Build HT Information */
2616 *pos++ = WLAN_EID_HT_OPERATION;
2617 *pos++ = sizeof(struct ieee80211_ht_operation);
2618 ht_oper = (struct ieee80211_ht_operation *)pos;
2619 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2620 chandef->chan->center_freq);
2621 switch (chandef->width) {
2622 case NL80211_CHAN_WIDTH_160:
2623 case NL80211_CHAN_WIDTH_80P80:
2624 case NL80211_CHAN_WIDTH_80:
2625 case NL80211_CHAN_WIDTH_40:
2626 if (chandef->center_freq1 > chandef->chan->center_freq)
2627 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2629 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2632 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2635 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2636 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2637 chandef->width != NL80211_CHAN_WIDTH_20)
2638 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2641 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2643 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2644 ht_oper->stbc_param = 0x0000;
2646 /* It seems that Basic MCS set and Supported MCS set
2647 are identical for the first 10 bytes */
2648 memset(&ht_oper->basic_set, 0, 16);
2649 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2651 return pos + sizeof(struct ieee80211_ht_operation);
2654 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2655 const struct cfg80211_chan_def *chandef)
2657 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2658 *pos++ = 3; /* IE length */
2659 /* New channel width */
2660 switch (chandef->width) {
2661 case NL80211_CHAN_WIDTH_80:
2662 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2664 case NL80211_CHAN_WIDTH_160:
2665 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2667 case NL80211_CHAN_WIDTH_80P80:
2668 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2671 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2674 /* new center frequency segment 0 */
2675 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2676 /* new center frequency segment 1 */
2677 if (chandef->center_freq2)
2678 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2683 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2684 const struct cfg80211_chan_def *chandef)
2686 struct ieee80211_vht_operation *vht_oper;
2688 *pos++ = WLAN_EID_VHT_OPERATION;
2689 *pos++ = sizeof(struct ieee80211_vht_operation);
2690 vht_oper = (struct ieee80211_vht_operation *)pos;
2691 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2692 chandef->center_freq1);
2693 if (chandef->center_freq2)
2694 vht_oper->center_freq_seg1_idx =
2695 ieee80211_frequency_to_channel(chandef->center_freq2);
2697 vht_oper->center_freq_seg1_idx = 0x00;
2699 switch (chandef->width) {
2700 case NL80211_CHAN_WIDTH_160:
2702 * Convert 160 MHz channel width to new style as interop
2705 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2706 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2707 if (chandef->chan->center_freq < chandef->center_freq1)
2708 vht_oper->center_freq_seg0_idx -= 8;
2710 vht_oper->center_freq_seg0_idx += 8;
2712 case NL80211_CHAN_WIDTH_80P80:
2714 * Convert 80+80 MHz channel width to new style as interop
2717 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2719 case NL80211_CHAN_WIDTH_80:
2720 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2723 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2727 /* don't require special VHT peer rates */
2728 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2730 return pos + sizeof(struct ieee80211_vht_operation);
2733 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2734 struct cfg80211_chan_def *chandef)
2736 enum nl80211_channel_type channel_type;
2741 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2742 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2743 channel_type = NL80211_CHAN_HT20;
2745 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2746 channel_type = NL80211_CHAN_HT40PLUS;
2748 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2749 channel_type = NL80211_CHAN_HT40MINUS;
2752 channel_type = NL80211_CHAN_NO_HT;
2756 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2760 bool ieee80211_chandef_vht_oper(const struct ieee80211_vht_operation *oper,
2761 struct cfg80211_chan_def *chandef)
2763 struct cfg80211_chan_def new = *chandef;
2769 cf1 = ieee80211_channel_to_frequency(oper->center_freq_seg0_idx,
2770 chandef->chan->band);
2771 cf2 = ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2772 chandef->chan->band);
2774 switch (oper->chan_width) {
2775 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2777 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2778 new.width = NL80211_CHAN_WIDTH_80;
2779 new.center_freq1 = cf1;
2780 /* If needed, adjust based on the newer interop workaround. */
2781 if (oper->center_freq_seg1_idx) {
2784 diff = abs(oper->center_freq_seg1_idx -
2785 oper->center_freq_seg0_idx);
2787 new.width = NL80211_CHAN_WIDTH_160;
2788 new.center_freq1 = cf2;
2789 } else if (diff > 8) {
2790 new.width = NL80211_CHAN_WIDTH_80P80;
2791 new.center_freq2 = cf2;
2795 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2796 new.width = NL80211_CHAN_WIDTH_160;
2797 new.center_freq1 = cf1;
2799 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2800 new.width = NL80211_CHAN_WIDTH_80P80;
2801 new.center_freq1 = cf1;
2802 new.center_freq2 = cf2;
2808 if (!cfg80211_chandef_valid(&new))
2815 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2816 const struct ieee80211_supported_band *sband,
2817 const u8 *srates, int srates_len, u32 *rates)
2819 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2820 int shift = ieee80211_chandef_get_shift(chandef);
2821 struct ieee80211_rate *br;
2822 int brate, rate, i, j, count = 0;
2826 for (i = 0; i < srates_len; i++) {
2827 rate = srates[i] & 0x7f;
2829 for (j = 0; j < sband->n_bitrates; j++) {
2830 br = &sband->bitrates[j];
2831 if ((rate_flags & br->flags) != rate_flags)
2834 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2835 if (brate == rate) {
2845 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2846 struct sk_buff *skb, bool need_basic,
2847 enum nl80211_band band)
2849 struct ieee80211_local *local = sdata->local;
2850 struct ieee80211_supported_band *sband;
2853 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2856 shift = ieee80211_vif_get_shift(&sdata->vif);
2857 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2858 sband = local->hw.wiphy->bands[band];
2860 for (i = 0; i < sband->n_bitrates; i++) {
2861 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2868 if (skb_tailroom(skb) < rates + 2)
2871 pos = skb_put(skb, rates + 2);
2872 *pos++ = WLAN_EID_SUPP_RATES;
2874 for (i = 0; i < rates; i++) {
2876 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2879 if (need_basic && basic_rates & BIT(i))
2881 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2883 *pos++ = basic | (u8) rate;
2889 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2890 struct sk_buff *skb, bool need_basic,
2891 enum nl80211_band band)
2893 struct ieee80211_local *local = sdata->local;
2894 struct ieee80211_supported_band *sband;
2896 u8 i, exrates, *pos;
2897 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2900 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2901 shift = ieee80211_vif_get_shift(&sdata->vif);
2903 sband = local->hw.wiphy->bands[band];
2905 for (i = 0; i < sband->n_bitrates; i++) {
2906 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2916 if (skb_tailroom(skb) < exrates + 2)
2920 pos = skb_put(skb, exrates + 2);
2921 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2923 for (i = 8; i < sband->n_bitrates; i++) {
2925 if ((rate_flags & sband->bitrates[i].flags)
2928 if (need_basic && basic_rates & BIT(i))
2930 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2932 *pos++ = basic | (u8) rate;
2938 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2940 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2941 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2943 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2944 /* non-managed type inferfaces */
2947 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2949 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2951 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2956 /* TODO: consider rx_highest */
2958 if (mcs->rx_mask[3])
2960 if (mcs->rx_mask[2])
2962 if (mcs->rx_mask[1])
2968 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2969 * @local: mac80211 hw info struct
2970 * @status: RX status
2971 * @mpdu_len: total MPDU length (including FCS)
2972 * @mpdu_offset: offset into MPDU to calculate timestamp at
2974 * This function calculates the RX timestamp at the given MPDU offset, taking
2975 * into account what the RX timestamp was. An offset of 0 will just normalize
2976 * the timestamp to TSF at beginning of MPDU reception.
2978 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2979 struct ieee80211_rx_status *status,
2980 unsigned int mpdu_len,
2981 unsigned int mpdu_offset)
2983 u64 ts = status->mactime;
2984 struct rate_info ri;
2987 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2990 memset(&ri, 0, sizeof(ri));
2994 /* Fill cfg80211 rate info */
2995 switch (status->encoding) {
2997 ri.mcs = status->rate_idx;
2998 ri.flags |= RATE_INFO_FLAGS_MCS;
2999 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3000 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3003 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3004 ri.mcs = status->rate_idx;
3005 ri.nss = status->nss;
3006 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3007 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3012 case RX_ENC_LEGACY: {
3013 struct ieee80211_supported_band *sband;
3017 switch (status->bw) {
3018 case RATE_INFO_BW_10:
3021 case RATE_INFO_BW_5:
3026 sband = local->hw.wiphy->bands[status->band];
3027 bitrate = sband->bitrates[status->rate_idx].bitrate;
3028 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3030 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3031 /* TODO: handle HT/VHT preambles */
3032 if (status->band == NL80211_BAND_5GHZ) {
3035 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3045 rate = cfg80211_calculate_bitrate(&ri);
3046 if (WARN_ONCE(!rate,
3047 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3048 (unsigned long long)status->flag, status->rate_idx,
3052 /* rewind from end of MPDU */
3053 if (status->flag & RX_FLAG_MACTIME_END)
3054 ts -= mpdu_len * 8 * 10 / rate;
3056 ts += mpdu_offset * 8 * 10 / rate;
3061 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3063 struct ieee80211_sub_if_data *sdata;
3064 struct cfg80211_chan_def chandef;
3066 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3069 mutex_lock(&local->mtx);
3070 list_for_each_entry(sdata, &local->interfaces, list) {
3071 /* it might be waiting for the local->mtx, but then
3072 * by the time it gets it, sdata->wdev.cac_started
3073 * will no longer be true
3075 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3077 if (sdata->wdev.cac_started) {
3078 chandef = sdata->vif.bss_conf.chandef;
3079 ieee80211_vif_release_channel(sdata);
3080 cfg80211_cac_event(sdata->dev,
3082 NL80211_RADAR_CAC_ABORTED,
3086 mutex_unlock(&local->mtx);
3089 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3091 struct ieee80211_local *local =
3092 container_of(work, struct ieee80211_local, radar_detected_work);
3093 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3094 struct ieee80211_chanctx *ctx;
3095 int num_chanctx = 0;
3097 mutex_lock(&local->chanctx_mtx);
3098 list_for_each_entry(ctx, &local->chanctx_list, list) {
3099 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3103 chandef = ctx->conf.def;
3105 mutex_unlock(&local->chanctx_mtx);
3108 ieee80211_dfs_cac_cancel(local);
3111 if (num_chanctx > 1)
3112 /* XXX: multi-channel is not supported yet */
3115 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3118 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3120 struct ieee80211_local *local = hw_to_local(hw);
3122 trace_api_radar_detected(local);
3124 schedule_work(&local->radar_detected_work);
3126 EXPORT_SYMBOL(ieee80211_radar_detected);
3128 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3134 case NL80211_CHAN_WIDTH_20:
3135 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3136 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3138 case NL80211_CHAN_WIDTH_40:
3139 c->width = NL80211_CHAN_WIDTH_20;
3140 c->center_freq1 = c->chan->center_freq;
3141 ret = IEEE80211_STA_DISABLE_40MHZ |
3142 IEEE80211_STA_DISABLE_VHT;
3144 case NL80211_CHAN_WIDTH_80:
3145 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3149 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3150 c->width = NL80211_CHAN_WIDTH_40;
3151 ret = IEEE80211_STA_DISABLE_VHT;
3153 case NL80211_CHAN_WIDTH_80P80:
3154 c->center_freq2 = 0;
3155 c->width = NL80211_CHAN_WIDTH_80;
3156 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3157 IEEE80211_STA_DISABLE_160MHZ;
3159 case NL80211_CHAN_WIDTH_160:
3161 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3164 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3165 c->width = NL80211_CHAN_WIDTH_80;
3166 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3167 IEEE80211_STA_DISABLE_160MHZ;
3170 case NL80211_CHAN_WIDTH_20_NOHT:
3172 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3173 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3175 case NL80211_CHAN_WIDTH_5:
3176 case NL80211_CHAN_WIDTH_10:
3179 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3183 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3189 * Returns true if smps_mode_new is strictly more restrictive than
3192 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3193 enum ieee80211_smps_mode smps_mode_new)
3195 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3196 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3199 switch (smps_mode_old) {
3200 case IEEE80211_SMPS_STATIC:
3202 case IEEE80211_SMPS_DYNAMIC:
3203 return smps_mode_new == IEEE80211_SMPS_STATIC;
3204 case IEEE80211_SMPS_OFF:
3205 return smps_mode_new != IEEE80211_SMPS_OFF;
3213 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3214 struct cfg80211_csa_settings *csa_settings)
3216 struct sk_buff *skb;
3217 struct ieee80211_mgmt *mgmt;
3218 struct ieee80211_local *local = sdata->local;
3220 int hdr_len = offsetofend(struct ieee80211_mgmt,
3221 u.action.u.chan_switch);
3224 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3225 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3228 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3229 5 + /* channel switch announcement element */
3230 3 + /* secondary channel offset element */
3231 5 + /* wide bandwidth channel switch announcement */
3232 8); /* mesh channel switch parameters element */
3236 skb_reserve(skb, local->tx_headroom);
3237 mgmt = skb_put_zero(skb, hdr_len);
3238 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3239 IEEE80211_STYPE_ACTION);
3241 eth_broadcast_addr(mgmt->da);
3242 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3243 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3244 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3246 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3247 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3249 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3250 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3251 pos = skb_put(skb, 5);
3252 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3253 *pos++ = 3; /* IE length */
3254 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3255 freq = csa_settings->chandef.chan->center_freq;
3256 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3257 *pos++ = csa_settings->count; /* count */
3259 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3260 enum nl80211_channel_type ch_type;
3263 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3264 *pos++ = 1; /* IE length */
3265 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3266 if (ch_type == NL80211_CHAN_HT40PLUS)
3267 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3269 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3272 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3273 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3276 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3277 *pos++ = 6; /* IE length */
3278 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3279 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3280 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3281 *pos++ |= csa_settings->block_tx ?
3282 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3283 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3285 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3289 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3290 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3291 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3293 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3296 ieee80211_tx_skb(sdata, skb);
3300 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3302 return !(cs == NULL || cs->cipher == 0 ||
3303 cs->hdr_len < cs->pn_len + cs->pn_off ||
3304 cs->hdr_len <= cs->key_idx_off ||
3305 cs->key_idx_shift > 7 ||
3306 cs->key_idx_mask == 0);
3309 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3313 /* Ensure we have enough iftype bitmap space for all iftype values */
3314 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3316 for (i = 0; i < n; i++)
3317 if (!ieee80211_cs_valid(&cs[i]))
3323 const struct ieee80211_cipher_scheme *
3324 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3325 enum nl80211_iftype iftype)
3327 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3328 int n = local->hw.n_cipher_schemes;
3330 const struct ieee80211_cipher_scheme *cs = NULL;
3332 for (i = 0; i < n; i++) {
3333 if (l[i].cipher == cipher) {
3339 if (!cs || !(cs->iftype & BIT(iftype)))
3345 int ieee80211_cs_headroom(struct ieee80211_local *local,
3346 struct cfg80211_crypto_settings *crypto,
3347 enum nl80211_iftype iftype)
3349 const struct ieee80211_cipher_scheme *cs;
3350 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3353 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3354 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3357 if (cs && headroom < cs->hdr_len)
3358 headroom = cs->hdr_len;
3361 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3362 if (cs && headroom < cs->hdr_len)
3363 headroom = cs->hdr_len;
3369 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3371 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3378 if (data->count[i] == 1)
3381 if (data->desc[i].interval == 0)
3384 /* End time is in the past, check for repetitions */
3385 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3386 if (data->count[i] < 255) {
3387 if (data->count[i] <= skip) {
3392 data->count[i] -= skip;
3395 data->desc[i].start += skip * data->desc[i].interval;
3401 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3407 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3410 if (!data->count[i])
3413 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3416 cur = data->desc[i].start - tsf;
3420 cur = data->desc[i].start + data->desc[i].duration - tsf;
3429 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3434 * arbitrary limit, used to avoid infinite loops when combined NoA
3435 * descriptors cover the full time period.
3439 ieee80211_extend_absent_time(data, tsf, &offset);
3441 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3445 } while (tries < max_tries);
3450 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3452 u32 next_offset = BIT(31) - 1;
3456 data->has_next_tsf = false;
3457 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3460 if (!data->count[i])
3463 ieee80211_extend_noa_desc(data, tsf, i);
3464 start = data->desc[i].start - tsf;
3466 data->absent |= BIT(i);
3468 if (next_offset > start)
3469 next_offset = start;
3471 data->has_next_tsf = true;
3475 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3477 data->next_tsf = tsf + next_offset;
3479 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3481 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3482 struct ieee80211_noa_data *data, u32 tsf)
3487 memset(data, 0, sizeof(*data));
3489 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3490 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3492 if (!desc->count || !desc->duration)
3495 data->count[i] = desc->count;
3496 data->desc[i].start = le32_to_cpu(desc->start_time);
3497 data->desc[i].duration = le32_to_cpu(desc->duration);
3498 data->desc[i].interval = le32_to_cpu(desc->interval);
3500 if (data->count[i] > 1 &&
3501 data->desc[i].interval < data->desc[i].duration)
3504 ieee80211_extend_noa_desc(data, tsf, i);
3509 ieee80211_update_p2p_noa(data, tsf);
3513 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3515 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3516 struct ieee80211_sub_if_data *sdata)
3518 u64 tsf = drv_get_tsf(local, sdata);
3520 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3521 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3525 if (tsf == -1ULL || !beacon_int || !dtim_period)
3528 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3529 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3533 ps = &sdata->bss->ps;
3534 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3535 ps = &sdata->u.mesh.ps;
3541 * actually finds last dtim_count, mac80211 will update in
3542 * __beacon_add_tim().
3543 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3545 do_div(tsf, beacon_int);
3546 bcns_from_dtim = do_div(tsf, dtim_period);
3547 /* just had a DTIM */
3548 if (!bcns_from_dtim)
3551 dtim_count = dtim_period - bcns_from_dtim;
3553 ps->dtim_count = dtim_count;
3556 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3557 struct ieee80211_chanctx *ctx)
3559 struct ieee80211_sub_if_data *sdata;
3560 u8 radar_detect = 0;
3562 lockdep_assert_held(&local->chanctx_mtx);
3564 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3567 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3568 if (sdata->reserved_radar_required)
3569 radar_detect |= BIT(sdata->reserved_chandef.width);
3572 * An in-place reservation context should not have any assigned vifs
3573 * until it replaces the other context.
3575 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3576 !list_empty(&ctx->assigned_vifs));
3578 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3579 if (sdata->radar_required)
3580 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3582 return radar_detect;
3585 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3586 const struct cfg80211_chan_def *chandef,
3587 enum ieee80211_chanctx_mode chanmode,
3590 struct ieee80211_local *local = sdata->local;
3591 struct ieee80211_sub_if_data *sdata_iter;
3592 enum nl80211_iftype iftype = sdata->wdev.iftype;
3593 struct ieee80211_chanctx *ctx;
3595 struct iface_combination_params params = {
3596 .radar_detect = radar_detect,
3599 lockdep_assert_held(&local->chanctx_mtx);
3601 if (WARN_ON(hweight32(radar_detect) > 1))
3604 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3608 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3611 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3612 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3614 * always passing this is harmless, since it'll be the
3615 * same value that cfg80211 finds if it finds the same
3616 * interface ... and that's always allowed
3618 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3621 /* Always allow software iftypes */
3622 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3629 params.num_different_channels = 1;
3631 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3632 params.iftype_num[iftype] = 1;
3634 list_for_each_entry(ctx, &local->chanctx_list, list) {
3635 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3637 params.radar_detect |=
3638 ieee80211_chanctx_radar_detect(local, ctx);
3639 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3640 params.num_different_channels++;
3643 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3644 cfg80211_chandef_compatible(chandef,
3647 params.num_different_channels++;
3650 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3651 struct wireless_dev *wdev_iter;
3653 wdev_iter = &sdata_iter->wdev;
3655 if (sdata_iter == sdata ||
3656 !ieee80211_sdata_running(sdata_iter) ||
3657 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3660 params.iftype_num[wdev_iter->iftype]++;
3664 if (total == 1 && !params.radar_detect)
3667 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3671 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3674 u32 *max_num_different_channels = data;
3676 *max_num_different_channels = max(*max_num_different_channels,
3677 c->num_different_channels);
3680 int ieee80211_max_num_channels(struct ieee80211_local *local)
3682 struct ieee80211_sub_if_data *sdata;
3683 struct ieee80211_chanctx *ctx;
3684 u32 max_num_different_channels = 1;
3686 struct iface_combination_params params = {0};
3688 lockdep_assert_held(&local->chanctx_mtx);
3690 list_for_each_entry(ctx, &local->chanctx_list, list) {
3691 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3694 params.num_different_channels++;
3696 params.radar_detect |=
3697 ieee80211_chanctx_radar_detect(local, ctx);
3700 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3701 params.iftype_num[sdata->wdev.iftype]++;
3703 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3704 ieee80211_iter_max_chans,
3705 &max_num_different_channels);
3709 return max_num_different_channels;
3712 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3714 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3715 *buf++ = 7; /* len */
3716 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3719 *buf++ = 2; /* WME */
3720 *buf++ = 0; /* WME info */
3721 *buf++ = 1; /* WME ver */
3722 *buf++ = qosinfo; /* U-APSD no in use */
3727 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3728 unsigned long *frame_cnt,
3729 unsigned long *byte_cnt)
3731 struct txq_info *txqi = to_txq_info(txq);
3732 u32 frag_cnt = 0, frag_bytes = 0;
3733 struct sk_buff *skb;
3735 skb_queue_walk(&txqi->frags, skb) {
3737 frag_bytes += skb->len;
3741 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3744 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3746 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3748 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3749 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3750 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3751 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3752 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK