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];
270 txqi = to_txq_info(txq);
275 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
279 spin_unlock_bh(&fq->lock);
280 drv_wake_tx_queue(local, txqi);
281 spin_lock_bh(&fq->lock);
288 txqi = to_txq_info(vif->txq);
290 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
291 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
294 spin_unlock_bh(&fq->lock);
296 drv_wake_tx_queue(local, txqi);
299 spin_unlock_bh(&fq->lock);
302 void ieee80211_wake_txqs(unsigned long data)
304 struct ieee80211_local *local = (struct ieee80211_local *)data;
305 struct ieee80211_sub_if_data *sdata;
306 int n_acs = IEEE80211_NUM_ACS;
311 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
313 if (local->hw.queues < IEEE80211_NUM_ACS)
316 for (i = 0; i < local->hw.queues; i++) {
317 if (local->queue_stop_reasons[i])
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
321 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
324 for (ac = 0; ac < n_acs; ac++) {
325 int ac_queue = sdata->vif.hw_queue[ac];
328 sdata->vif.cab_queue == i)
329 __ieee80211_wake_txqs(sdata, ac);
332 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
335 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
339 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
341 struct ieee80211_sub_if_data *sdata;
342 int n_acs = IEEE80211_NUM_ACS;
344 if (local->ops->wake_tx_queue)
347 if (local->hw.queues < IEEE80211_NUM_ACS)
350 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
356 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
357 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
360 for (ac = 0; ac < n_acs; ac++) {
361 int ac_queue = sdata->vif.hw_queue[ac];
363 if (ac_queue == queue ||
364 (sdata->vif.cab_queue == queue &&
365 local->queue_stop_reasons[ac_queue] == 0 &&
366 skb_queue_empty(&local->pending[ac_queue])))
367 netif_wake_subqueue(sdata->dev, ac);
372 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
373 enum queue_stop_reason reason,
376 struct ieee80211_local *local = hw_to_local(hw);
378 trace_wake_queue(local, queue, reason);
380 if (WARN_ON(queue >= hw->queues))
383 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
387 local->q_stop_reasons[queue][reason] = 0;
389 local->q_stop_reasons[queue][reason]--;
390 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
391 local->q_stop_reasons[queue][reason] = 0;
394 if (local->q_stop_reasons[queue][reason] == 0)
395 __clear_bit(reason, &local->queue_stop_reasons[queue]);
397 if (local->queue_stop_reasons[queue] != 0)
398 /* someone still has this queue stopped */
401 if (skb_queue_empty(&local->pending[queue])) {
403 ieee80211_propagate_queue_wake(local, queue);
406 tasklet_schedule(&local->tx_pending_tasklet);
408 if (local->ops->wake_tx_queue)
409 tasklet_schedule(&local->wake_txqs_tasklet);
412 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
413 enum queue_stop_reason reason,
416 struct ieee80211_local *local = hw_to_local(hw);
419 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
420 __ieee80211_wake_queue(hw, queue, reason, refcounted);
421 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
424 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
426 ieee80211_wake_queue_by_reason(hw, queue,
427 IEEE80211_QUEUE_STOP_REASON_DRIVER,
430 EXPORT_SYMBOL(ieee80211_wake_queue);
432 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
433 enum queue_stop_reason reason,
436 struct ieee80211_local *local = hw_to_local(hw);
437 struct ieee80211_sub_if_data *sdata;
438 int n_acs = IEEE80211_NUM_ACS;
440 trace_stop_queue(local, queue, reason);
442 if (WARN_ON(queue >= hw->queues))
446 local->q_stop_reasons[queue][reason] = 1;
448 local->q_stop_reasons[queue][reason]++;
450 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
453 if (local->hw.queues < IEEE80211_NUM_ACS)
457 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
463 for (ac = 0; ac < n_acs; ac++) {
464 if (sdata->vif.hw_queue[ac] == queue ||
465 sdata->vif.cab_queue == queue) {
466 if (!local->ops->wake_tx_queue) {
467 netif_stop_subqueue(sdata->dev, ac);
470 spin_lock(&local->fq.lock);
471 sdata->vif.txqs_stopped[ac] = true;
472 spin_unlock(&local->fq.lock);
479 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
480 enum queue_stop_reason reason,
483 struct ieee80211_local *local = hw_to_local(hw);
486 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
487 __ieee80211_stop_queue(hw, queue, reason, refcounted);
488 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
491 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
493 ieee80211_stop_queue_by_reason(hw, queue,
494 IEEE80211_QUEUE_STOP_REASON_DRIVER,
497 EXPORT_SYMBOL(ieee80211_stop_queue);
499 void ieee80211_add_pending_skb(struct ieee80211_local *local,
502 struct ieee80211_hw *hw = &local->hw;
504 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
505 int queue = info->hw_queue;
507 if (WARN_ON(!info->control.vif)) {
508 ieee80211_free_txskb(&local->hw, skb);
512 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
513 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
515 __skb_queue_tail(&local->pending[queue], skb);
516 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
518 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
521 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
522 struct sk_buff_head *skbs)
524 struct ieee80211_hw *hw = &local->hw;
529 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
530 while ((skb = skb_dequeue(skbs))) {
531 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
533 if (WARN_ON(!info->control.vif)) {
534 ieee80211_free_txskb(&local->hw, skb);
538 queue = info->hw_queue;
540 __ieee80211_stop_queue(hw, queue,
541 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
544 __skb_queue_tail(&local->pending[queue], skb);
547 for (i = 0; i < hw->queues; i++)
548 __ieee80211_wake_queue(hw, i,
549 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
551 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
554 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
555 unsigned long queues,
556 enum queue_stop_reason reason,
559 struct ieee80211_local *local = hw_to_local(hw);
563 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
565 for_each_set_bit(i, &queues, hw->queues)
566 __ieee80211_stop_queue(hw, i, reason, refcounted);
568 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
571 void ieee80211_stop_queues(struct ieee80211_hw *hw)
573 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
574 IEEE80211_QUEUE_STOP_REASON_DRIVER,
577 EXPORT_SYMBOL(ieee80211_stop_queues);
579 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
581 struct ieee80211_local *local = hw_to_local(hw);
585 if (WARN_ON(queue >= hw->queues))
588 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
589 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
590 &local->queue_stop_reasons[queue]);
591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
594 EXPORT_SYMBOL(ieee80211_queue_stopped);
596 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
597 unsigned long queues,
598 enum queue_stop_reason reason,
601 struct ieee80211_local *local = hw_to_local(hw);
605 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
607 for_each_set_bit(i, &queues, hw->queues)
608 __ieee80211_wake_queue(hw, i, reason, refcounted);
610 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
613 void ieee80211_wake_queues(struct ieee80211_hw *hw)
615 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
616 IEEE80211_QUEUE_STOP_REASON_DRIVER,
619 EXPORT_SYMBOL(ieee80211_wake_queues);
622 ieee80211_get_vif_queues(struct ieee80211_local *local,
623 struct ieee80211_sub_if_data *sdata)
627 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
632 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
633 queues |= BIT(sdata->vif.hw_queue[ac]);
634 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
635 queues |= BIT(sdata->vif.cab_queue);
638 queues = BIT(local->hw.queues) - 1;
644 void __ieee80211_flush_queues(struct ieee80211_local *local,
645 struct ieee80211_sub_if_data *sdata,
646 unsigned int queues, bool drop)
648 if (!local->ops->flush)
652 * If no queue was set, or if the HW doesn't support
653 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
655 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
656 queues = ieee80211_get_vif_queues(local, sdata);
658 ieee80211_stop_queues_by_reason(&local->hw, queues,
659 IEEE80211_QUEUE_STOP_REASON_FLUSH,
662 drv_flush(local, sdata, queues, drop);
664 ieee80211_wake_queues_by_reason(&local->hw, queues,
665 IEEE80211_QUEUE_STOP_REASON_FLUSH,
669 void ieee80211_flush_queues(struct ieee80211_local *local,
670 struct ieee80211_sub_if_data *sdata, bool drop)
672 __ieee80211_flush_queues(local, sdata, 0, drop);
675 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
676 struct ieee80211_sub_if_data *sdata,
677 enum queue_stop_reason reason)
679 ieee80211_stop_queues_by_reason(&local->hw,
680 ieee80211_get_vif_queues(local, sdata),
684 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
685 struct ieee80211_sub_if_data *sdata,
686 enum queue_stop_reason reason)
688 ieee80211_wake_queues_by_reason(&local->hw,
689 ieee80211_get_vif_queues(local, sdata),
693 static void __iterate_interfaces(struct ieee80211_local *local,
695 void (*iterator)(void *data, u8 *mac,
696 struct ieee80211_vif *vif),
699 struct ieee80211_sub_if_data *sdata;
700 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
702 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
703 switch (sdata->vif.type) {
704 case NL80211_IFTYPE_MONITOR:
705 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
708 case NL80211_IFTYPE_AP_VLAN:
713 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
714 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
716 if (ieee80211_sdata_running(sdata) || !active_only)
717 iterator(data, sdata->vif.addr,
721 sdata = rcu_dereference_check(local->monitor_sdata,
722 lockdep_is_held(&local->iflist_mtx) ||
723 lockdep_rtnl_is_held());
725 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
726 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
727 iterator(data, sdata->vif.addr, &sdata->vif);
730 void ieee80211_iterate_interfaces(
731 struct ieee80211_hw *hw, u32 iter_flags,
732 void (*iterator)(void *data, u8 *mac,
733 struct ieee80211_vif *vif),
736 struct ieee80211_local *local = hw_to_local(hw);
738 mutex_lock(&local->iflist_mtx);
739 __iterate_interfaces(local, iter_flags, iterator, data);
740 mutex_unlock(&local->iflist_mtx);
742 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
744 void ieee80211_iterate_active_interfaces_atomic(
745 struct ieee80211_hw *hw, u32 iter_flags,
746 void (*iterator)(void *data, u8 *mac,
747 struct ieee80211_vif *vif),
750 struct ieee80211_local *local = hw_to_local(hw);
753 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
757 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
759 void ieee80211_iterate_active_interfaces_rtnl(
760 struct ieee80211_hw *hw, u32 iter_flags,
761 void (*iterator)(void *data, u8 *mac,
762 struct ieee80211_vif *vif),
765 struct ieee80211_local *local = hw_to_local(hw);
769 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
772 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
774 static void __iterate_stations(struct ieee80211_local *local,
775 void (*iterator)(void *data,
776 struct ieee80211_sta *sta),
779 struct sta_info *sta;
781 list_for_each_entry_rcu(sta, &local->sta_list, list) {
785 iterator(data, &sta->sta);
789 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
790 void (*iterator)(void *data,
791 struct ieee80211_sta *sta),
794 struct ieee80211_local *local = hw_to_local(hw);
797 __iterate_stations(local, iterator, data);
800 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
802 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
804 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
806 if (!ieee80211_sdata_running(sdata) ||
807 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
811 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
813 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
815 struct ieee80211_sub_if_data *sdata;
820 sdata = vif_to_sdata(vif);
822 if (!ieee80211_sdata_running(sdata) ||
823 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
828 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
831 * Nothing should have been stuffed into the workqueue during
832 * the suspend->resume cycle. Since we can't check each caller
833 * of this function if we are already quiescing / suspended,
834 * check here and don't WARN since this can actually happen when
835 * the rx path (for example) is racing against __ieee80211_suspend
836 * and suspending / quiescing was set after the rx path checked
839 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
841 if (local->quiescing || (local->suspended && !local->resuming)) {
842 pr_warn("queueing ieee80211 work while going to suspend\n");
849 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
851 struct ieee80211_local *local = hw_to_local(hw);
853 if (!ieee80211_can_queue_work(local))
856 queue_work(local->workqueue, work);
858 EXPORT_SYMBOL(ieee80211_queue_work);
860 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
861 struct delayed_work *dwork,
864 struct ieee80211_local *local = hw_to_local(hw);
866 if (!ieee80211_can_queue_work(local))
869 queue_delayed_work(local->workqueue, dwork, delay);
871 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
873 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
874 struct ieee802_11_elems *elems,
878 const u8 *pos = start;
879 bool calc_crc = filter != 0;
880 DECLARE_BITMAP(seen_elems, 256);
883 bitmap_zero(seen_elems, 256);
884 memset(elems, 0, sizeof(*elems));
885 elems->ie_start = start;
886 elems->total_len = len;
890 bool elem_parse_failed;
897 elems->parse_error = true;
903 case WLAN_EID_SUPP_RATES:
904 case WLAN_EID_FH_PARAMS:
905 case WLAN_EID_DS_PARAMS:
906 case WLAN_EID_CF_PARAMS:
908 case WLAN_EID_IBSS_PARAMS:
909 case WLAN_EID_CHALLENGE:
911 case WLAN_EID_ERP_INFO:
912 case WLAN_EID_EXT_SUPP_RATES:
913 case WLAN_EID_HT_CAPABILITY:
914 case WLAN_EID_HT_OPERATION:
915 case WLAN_EID_VHT_CAPABILITY:
916 case WLAN_EID_VHT_OPERATION:
917 case WLAN_EID_MESH_ID:
918 case WLAN_EID_MESH_CONFIG:
919 case WLAN_EID_PEER_MGMT:
924 case WLAN_EID_CHANNEL_SWITCH:
925 case WLAN_EID_EXT_CHANSWITCH_ANN:
926 case WLAN_EID_COUNTRY:
927 case WLAN_EID_PWR_CONSTRAINT:
928 case WLAN_EID_TIMEOUT_INTERVAL:
929 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
930 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
931 case WLAN_EID_CHAN_SWITCH_PARAM:
932 case WLAN_EID_EXT_CAPABILITY:
933 case WLAN_EID_CHAN_SWITCH_TIMING:
934 case WLAN_EID_LINK_ID:
935 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
937 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
938 * that if the content gets bigger it might be needed more than once
940 if (test_bit(id, seen_elems)) {
941 elems->parse_error = true;
949 if (calc_crc && id < 64 && (filter & (1ULL << id)))
950 crc = crc32_be(crc, pos - 2, elen + 2);
952 elem_parse_failed = false;
955 case WLAN_EID_LINK_ID:
956 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
957 elem_parse_failed = true;
960 elems->lnk_id = (void *)(pos - 2);
962 case WLAN_EID_CHAN_SWITCH_TIMING:
963 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
964 elem_parse_failed = true;
967 elems->ch_sw_timing = (void *)pos;
969 case WLAN_EID_EXT_CAPABILITY:
970 elems->ext_capab = pos;
971 elems->ext_capab_len = elen;
975 elems->ssid_len = elen;
977 case WLAN_EID_SUPP_RATES:
978 elems->supp_rates = pos;
979 elems->supp_rates_len = elen;
981 case WLAN_EID_DS_PARAMS:
983 elems->ds_params = pos;
985 elem_parse_failed = true;
988 if (elen >= sizeof(struct ieee80211_tim_ie)) {
989 elems->tim = (void *)pos;
990 elems->tim_len = elen;
992 elem_parse_failed = true;
994 case WLAN_EID_CHALLENGE:
995 elems->challenge = pos;
996 elems->challenge_len = elen;
998 case WLAN_EID_VENDOR_SPECIFIC:
999 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1001 /* Microsoft OUI (00:50:F2) */
1004 crc = crc32_be(crc, pos - 2, elen + 2);
1006 if (elen >= 5 && pos[3] == 2) {
1007 /* OUI Type 2 - WMM IE */
1009 elems->wmm_info = pos;
1010 elems->wmm_info_len = elen;
1011 } else if (pos[4] == 1) {
1012 elems->wmm_param = pos;
1013 elems->wmm_param_len = elen;
1020 elems->rsn_len = elen;
1022 case WLAN_EID_ERP_INFO:
1024 elems->erp_info = pos;
1026 elem_parse_failed = true;
1028 case WLAN_EID_EXT_SUPP_RATES:
1029 elems->ext_supp_rates = pos;
1030 elems->ext_supp_rates_len = elen;
1032 case WLAN_EID_HT_CAPABILITY:
1033 if (elen >= sizeof(struct ieee80211_ht_cap))
1034 elems->ht_cap_elem = (void *)pos;
1036 elem_parse_failed = true;
1038 case WLAN_EID_HT_OPERATION:
1039 if (elen >= sizeof(struct ieee80211_ht_operation))
1040 elems->ht_operation = (void *)pos;
1042 elem_parse_failed = true;
1044 case WLAN_EID_VHT_CAPABILITY:
1045 if (elen >= sizeof(struct ieee80211_vht_cap))
1046 elems->vht_cap_elem = (void *)pos;
1048 elem_parse_failed = true;
1050 case WLAN_EID_VHT_OPERATION:
1051 if (elen >= sizeof(struct ieee80211_vht_operation))
1052 elems->vht_operation = (void *)pos;
1054 elem_parse_failed = true;
1056 case WLAN_EID_OPMODE_NOTIF:
1058 elems->opmode_notif = pos;
1060 elem_parse_failed = true;
1062 case WLAN_EID_MESH_ID:
1063 elems->mesh_id = pos;
1064 elems->mesh_id_len = elen;
1066 case WLAN_EID_MESH_CONFIG:
1067 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1068 elems->mesh_config = (void *)pos;
1070 elem_parse_failed = true;
1072 case WLAN_EID_PEER_MGMT:
1073 elems->peering = pos;
1074 elems->peering_len = elen;
1076 case WLAN_EID_MESH_AWAKE_WINDOW:
1078 elems->awake_window = (void *)pos;
1082 elems->preq_len = elen;
1086 elems->prep_len = elen;
1090 elems->perr_len = elen;
1093 if (elen >= sizeof(struct ieee80211_rann_ie))
1094 elems->rann = (void *)pos;
1096 elem_parse_failed = true;
1098 case WLAN_EID_CHANNEL_SWITCH:
1099 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1100 elem_parse_failed = true;
1103 elems->ch_switch_ie = (void *)pos;
1105 case WLAN_EID_EXT_CHANSWITCH_ANN:
1106 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1107 elem_parse_failed = true;
1110 elems->ext_chansw_ie = (void *)pos;
1112 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1113 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1114 elem_parse_failed = true;
1117 elems->sec_chan_offs = (void *)pos;
1119 case WLAN_EID_CHAN_SWITCH_PARAM:
1121 sizeof(*elems->mesh_chansw_params_ie)) {
1122 elem_parse_failed = true;
1125 elems->mesh_chansw_params_ie = (void *)pos;
1127 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1129 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1130 elem_parse_failed = true;
1133 elems->wide_bw_chansw_ie = (void *)pos;
1135 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1137 elem_parse_failed = true;
1141 * This is a bit tricky, but as we only care about
1142 * the wide bandwidth channel switch element, so
1143 * just parse it out manually.
1145 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1148 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1149 elems->wide_bw_chansw_ie =
1152 elem_parse_failed = true;
1155 case WLAN_EID_COUNTRY:
1156 elems->country_elem = pos;
1157 elems->country_elem_len = elen;
1159 case WLAN_EID_PWR_CONSTRAINT:
1161 elem_parse_failed = true;
1164 elems->pwr_constr_elem = pos;
1166 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1167 /* Lots of different options exist, but we only care
1168 * about the Dynamic Transmit Power Control element.
1169 * First check for the Cisco OUI, then for the DTPC
1173 elem_parse_failed = true;
1177 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1178 pos[2] != 0x96 || pos[3] != 0x00)
1182 elem_parse_failed = true;
1187 crc = crc32_be(crc, pos - 2, elen + 2);
1189 elems->cisco_dtpc_elem = pos;
1191 case WLAN_EID_TIMEOUT_INTERVAL:
1192 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1193 elems->timeout_int = (void *)pos;
1195 elem_parse_failed = true;
1197 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1198 if (elen >= sizeof(*elems->max_idle_period_ie))
1199 elems->max_idle_period_ie = (void *)pos;
1201 case WLAN_EID_EXTENSION:
1202 if (pos[0] == WLAN_EID_EXT_HE_MU_EDCA &&
1203 elen >= (sizeof(*elems->mu_edca_param_set) + 1)) {
1204 elems->mu_edca_param_set = (void *)&pos[1];
1205 } else if (pos[0] == WLAN_EID_EXT_HE_CAPABILITY) {
1206 elems->he_cap = (void *)&pos[1];
1207 elems->he_cap_len = elen - 1;
1208 } else if (pos[0] == WLAN_EID_EXT_HE_OPERATION &&
1209 elen >= sizeof(*elems->he_operation) &&
1210 elen >= ieee80211_he_oper_size(&pos[1])) {
1211 elems->he_operation = (void *)&pos[1];
1212 } else if (pos[0] == WLAN_EID_EXT_UORA && elen >= 1) {
1213 elems->uora_element = (void *)&pos[1];
1220 if (elem_parse_failed)
1221 elems->parse_error = true;
1223 __set_bit(id, seen_elems);
1230 elems->parse_error = true;
1235 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1236 struct ieee80211_tx_queue_params
1239 struct ieee80211_chanctx_conf *chanctx_conf;
1240 const struct ieee80211_reg_rule *rrule;
1241 const struct ieee80211_wmm_ac *wmm_ac;
1242 u16 center_freq = 0;
1244 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1245 sdata->vif.type != NL80211_IFTYPE_STATION)
1249 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1251 center_freq = chanctx_conf->def.chan->center_freq;
1258 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1260 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1265 if (sdata->vif.type == NL80211_IFTYPE_AP)
1266 wmm_ac = &rrule->wmm_rule.ap[ac];
1268 wmm_ac = &rrule->wmm_rule.client[ac];
1269 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1270 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1271 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1272 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1276 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1277 bool bss_notify, bool enable_qos)
1279 struct ieee80211_local *local = sdata->local;
1280 struct ieee80211_tx_queue_params qparam;
1281 struct ieee80211_chanctx_conf *chanctx_conf;
1284 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1287 if (!local->ops->conf_tx)
1290 if (local->hw.queues < IEEE80211_NUM_ACS)
1293 memset(&qparam, 0, sizeof(qparam));
1296 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1297 use_11b = (chanctx_conf &&
1298 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1299 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1302 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1304 /* Set defaults according to 802.11-2007 Table 7-37 */
1311 /* Confiure old 802.11b/g medium access rules. */
1312 qparam.cw_max = aCWmax;
1313 qparam.cw_min = aCWmin;
1317 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1318 /* Update if QoS is enabled. */
1321 case IEEE80211_AC_BK:
1322 qparam.cw_max = aCWmax;
1323 qparam.cw_min = aCWmin;
1330 /* never happens but let's not leave undefined */
1332 case IEEE80211_AC_BE:
1333 qparam.cw_max = aCWmax;
1334 qparam.cw_min = aCWmin;
1341 case IEEE80211_AC_VI:
1342 qparam.cw_max = aCWmin;
1343 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1347 qparam.txop = 6016/32;
1349 qparam.txop = 3008/32;
1356 case IEEE80211_AC_VO:
1357 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1358 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1362 qparam.txop = 3264/32;
1364 qparam.txop = 1504/32;
1369 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1371 qparam.uapsd = false;
1373 sdata->tx_conf[ac] = qparam;
1374 drv_conf_tx(local, sdata, ac, &qparam);
1377 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1378 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1379 sdata->vif.type != NL80211_IFTYPE_NAN) {
1380 sdata->vif.bss_conf.qos = enable_qos;
1382 ieee80211_bss_info_change_notify(sdata,
1387 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1388 u16 transaction, u16 auth_alg, u16 status,
1389 const u8 *extra, size_t extra_len, const u8 *da,
1390 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1393 struct ieee80211_local *local = sdata->local;
1394 struct sk_buff *skb;
1395 struct ieee80211_mgmt *mgmt;
1398 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1399 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1400 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1404 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1406 mgmt = skb_put_zero(skb, 24 + 6);
1407 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1408 IEEE80211_STYPE_AUTH);
1409 memcpy(mgmt->da, da, ETH_ALEN);
1410 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1411 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1412 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1413 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1414 mgmt->u.auth.status_code = cpu_to_le16(status);
1416 skb_put_data(skb, extra, extra_len);
1418 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1419 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1420 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1424 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1426 ieee80211_tx_skb(sdata, skb);
1429 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1430 const u8 *bssid, u16 stype, u16 reason,
1431 bool send_frame, u8 *frame_buf)
1433 struct ieee80211_local *local = sdata->local;
1434 struct sk_buff *skb;
1435 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1438 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1439 mgmt->duration = 0; /* initialize only */
1440 mgmt->seq_ctrl = 0; /* initialize only */
1441 memcpy(mgmt->da, bssid, ETH_ALEN);
1442 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1443 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1444 /* u.deauth.reason_code == u.disassoc.reason_code */
1445 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1448 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1449 IEEE80211_DEAUTH_FRAME_LEN);
1453 skb_reserve(skb, local->hw.extra_tx_headroom);
1456 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1458 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1459 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1460 IEEE80211_SKB_CB(skb)->flags |=
1461 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1463 ieee80211_tx_skb(sdata, skb);
1467 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1468 u8 *buffer, size_t buffer_len,
1469 const u8 *ie, size_t ie_len,
1470 enum nl80211_band band,
1472 struct cfg80211_chan_def *chandef,
1473 size_t *offset, u32 flags)
1475 struct ieee80211_supported_band *sband;
1476 const struct ieee80211_sta_he_cap *he_cap;
1477 u8 *pos = buffer, *end = buffer + buffer_len;
1479 int supp_rates_len, i;
1485 bool have_80mhz = false;
1489 sband = local->hw.wiphy->bands[band];
1490 if (WARN_ON_ONCE(!sband))
1493 rate_flags = ieee80211_chandef_rate_flags(chandef);
1494 shift = ieee80211_chandef_get_shift(chandef);
1497 for (i = 0; i < sband->n_bitrates; i++) {
1498 if ((BIT(i) & rate_mask) == 0)
1499 continue; /* skip rate */
1500 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1503 rates[num_rates++] =
1504 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1508 supp_rates_len = min_t(int, num_rates, 8);
1510 if (end - pos < 2 + supp_rates_len)
1512 *pos++ = WLAN_EID_SUPP_RATES;
1513 *pos++ = supp_rates_len;
1514 memcpy(pos, rates, supp_rates_len);
1515 pos += supp_rates_len;
1517 /* insert "request information" if in custom IEs */
1519 static const u8 before_extrates[] = {
1521 WLAN_EID_SUPP_RATES,
1524 noffset = ieee80211_ie_split(ie, ie_len,
1526 ARRAY_SIZE(before_extrates),
1528 if (end - pos < noffset - *offset)
1530 memcpy(pos, ie + *offset, noffset - *offset);
1531 pos += noffset - *offset;
1535 ext_rates_len = num_rates - supp_rates_len;
1536 if (ext_rates_len > 0) {
1537 if (end - pos < 2 + ext_rates_len)
1539 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1540 *pos++ = ext_rates_len;
1541 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1542 pos += ext_rates_len;
1545 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1548 *pos++ = WLAN_EID_DS_PARAMS;
1550 *pos++ = ieee80211_frequency_to_channel(
1551 chandef->chan->center_freq);
1554 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1557 /* insert custom IEs that go before HT */
1559 static const u8 before_ht[] = {
1561 * no need to list the ones split off already
1562 * (or generated here)
1565 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1567 noffset = ieee80211_ie_split(ie, ie_len,
1568 before_ht, ARRAY_SIZE(before_ht),
1570 if (end - pos < noffset - *offset)
1572 memcpy(pos, ie + *offset, noffset - *offset);
1573 pos += noffset - *offset;
1577 if (sband->ht_cap.ht_supported) {
1578 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1580 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1584 /* insert custom IEs that go before VHT */
1586 static const u8 before_vht[] = {
1588 * no need to list the ones split off already
1589 * (or generated here)
1591 WLAN_EID_BSS_COEX_2040,
1592 WLAN_EID_EXT_CAPABILITY,
1594 WLAN_EID_CHANNEL_USAGE,
1595 WLAN_EID_INTERWORKING,
1597 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1599 noffset = ieee80211_ie_split(ie, ie_len,
1600 before_vht, ARRAY_SIZE(before_vht),
1602 if (end - pos < noffset - *offset)
1604 memcpy(pos, ie + *offset, noffset - *offset);
1605 pos += noffset - *offset;
1609 /* Check if any channel in this sband supports at least 80 MHz */
1610 for (i = 0; i < sband->n_channels; i++) {
1611 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1612 IEEE80211_CHAN_NO_80MHZ))
1619 if (sband->vht_cap.vht_supported && have_80mhz) {
1620 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1622 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1623 sband->vht_cap.cap);
1626 /* insert custom IEs that go before HE */
1628 static const u8 before_he[] = {
1630 * no need to list the ones split off before VHT
1633 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1635 /* TODO: add 11ah/11aj/11ak elements */
1637 noffset = ieee80211_ie_split(ie, ie_len,
1638 before_he, ARRAY_SIZE(before_he),
1640 if (end - pos < noffset - *offset)
1642 memcpy(pos, ie + *offset, noffset - *offset);
1643 pos += noffset - *offset;
1647 he_cap = ieee80211_get_he_sta_cap(sband);
1649 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1655 * If adding more here, adjust code in main.c
1656 * that calculates local->scan_ies_len.
1659 return pos - buffer;
1661 WARN_ONCE(1, "not enough space for preq IEs\n");
1663 return pos - buffer;
1666 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1668 struct ieee80211_scan_ies *ie_desc,
1669 const u8 *ie, size_t ie_len,
1670 u8 bands_used, u32 *rate_masks,
1671 struct cfg80211_chan_def *chandef,
1674 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1677 memset(ie_desc, 0, sizeof(*ie_desc));
1679 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1680 if (bands_used & BIT(i)) {
1681 pos += ieee80211_build_preq_ies_band(local,
1689 ie_desc->ies[i] = buffer + old_pos;
1690 ie_desc->len[i] = pos - old_pos;
1695 /* add any remaining custom IEs */
1697 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1698 "not enough space for preq custom IEs\n"))
1700 memcpy(buffer + pos, ie + custom_ie_offset,
1701 ie_len - custom_ie_offset);
1702 ie_desc->common_ies = buffer + pos;
1703 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1704 pos += ie_len - custom_ie_offset;
1710 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1711 const u8 *src, const u8 *dst,
1713 struct ieee80211_channel *chan,
1714 const u8 *ssid, size_t ssid_len,
1715 const u8 *ie, size_t ie_len,
1718 struct ieee80211_local *local = sdata->local;
1719 struct cfg80211_chan_def chandef;
1720 struct sk_buff *skb;
1721 struct ieee80211_mgmt *mgmt;
1723 u32 rate_masks[NUM_NL80211_BANDS] = {};
1724 struct ieee80211_scan_ies dummy_ie_desc;
1727 * Do not send DS Channel parameter for directed probe requests
1728 * in order to maximize the chance that we get a response. Some
1729 * badly-behaved APs don't respond when this parameter is included.
1731 chandef.width = sdata->vif.bss_conf.chandef.width;
1732 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
1733 chandef.chan = NULL;
1735 chandef.chan = chan;
1737 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1742 rate_masks[chan->band] = ratemask;
1743 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1744 skb_tailroom(skb), &dummy_ie_desc,
1745 ie, ie_len, BIT(chan->band),
1746 rate_masks, &chandef, flags);
1747 skb_put(skb, ies_len);
1750 mgmt = (struct ieee80211_mgmt *) skb->data;
1751 memcpy(mgmt->da, dst, ETH_ALEN);
1752 memcpy(mgmt->bssid, dst, ETH_ALEN);
1755 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1760 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1761 struct ieee802_11_elems *elems,
1762 enum nl80211_band band, u32 *basic_rates)
1764 struct ieee80211_supported_band *sband;
1766 u32 supp_rates, rate_flags;
1769 sband = sdata->local->hw.wiphy->bands[band];
1770 if (WARN_ON(!sband))
1773 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1774 shift = ieee80211_vif_get_shift(&sdata->vif);
1776 num_rates = sband->n_bitrates;
1778 for (i = 0; i < elems->supp_rates_len +
1779 elems->ext_supp_rates_len; i++) {
1783 if (i < elems->supp_rates_len)
1784 rate = elems->supp_rates[i];
1785 else if (elems->ext_supp_rates)
1786 rate = elems->ext_supp_rates
1787 [i - elems->supp_rates_len];
1788 own_rate = 5 * (rate & 0x7f);
1789 is_basic = !!(rate & 0x80);
1791 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1794 for (j = 0; j < num_rates; j++) {
1796 if ((rate_flags & sband->bitrates[j].flags)
1800 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1803 if (brate == own_rate) {
1804 supp_rates |= BIT(j);
1805 if (basic_rates && is_basic)
1806 *basic_rates |= BIT(j);
1813 void ieee80211_stop_device(struct ieee80211_local *local)
1815 ieee80211_led_radio(local, false);
1816 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1818 cancel_work_sync(&local->reconfig_filter);
1820 flush_workqueue(local->workqueue);
1824 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
1827 /* It's possible that we don't handle the scan completion in
1828 * time during suspend, so if it's still marked as completed
1829 * here, queue the work and flush it to clean things up.
1830 * Instead of calling the worker function directly here, we
1831 * really queue it to avoid potential races with other flows
1832 * scheduling the same work.
1834 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
1835 /* If coming from reconfiguration failure, abort the scan so
1836 * we don't attempt to continue a partial HW scan - which is
1837 * possible otherwise if (e.g.) the 2.4 GHz portion was the
1838 * completed scan, and a 5 GHz portion is still pending.
1841 set_bit(SCAN_ABORTED, &local->scanning);
1842 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
1843 flush_delayed_work(&local->scan_work);
1847 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1849 struct ieee80211_sub_if_data *sdata;
1850 struct ieee80211_chanctx *ctx;
1853 * We get here if during resume the device can't be restarted properly.
1854 * We might also get here if this happens during HW reset, which is a
1855 * slightly different situation and we need to drop all connections in
1858 * Ask cfg80211 to turn off all interfaces, this will result in more
1859 * warnings but at least we'll then get into a clean stopped state.
1862 local->resuming = false;
1863 local->suspended = false;
1864 local->in_reconfig = false;
1866 ieee80211_flush_completed_scan(local, true);
1868 /* scheduled scan clearly can't be running any more, but tell
1869 * cfg80211 and clear local state
1871 ieee80211_sched_scan_end(local);
1873 list_for_each_entry(sdata, &local->interfaces, list)
1874 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1876 /* Mark channel contexts as not being in the driver any more to avoid
1877 * removing them from the driver during the shutdown process...
1879 mutex_lock(&local->chanctx_mtx);
1880 list_for_each_entry(ctx, &local->chanctx_list, list)
1881 ctx->driver_present = false;
1882 mutex_unlock(&local->chanctx_mtx);
1884 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1887 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1888 struct ieee80211_sub_if_data *sdata)
1890 struct ieee80211_chanctx_conf *conf;
1891 struct ieee80211_chanctx *ctx;
1893 if (!local->use_chanctx)
1896 mutex_lock(&local->chanctx_mtx);
1897 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1898 lockdep_is_held(&local->chanctx_mtx));
1900 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1901 drv_assign_vif_chanctx(local, sdata, ctx);
1903 mutex_unlock(&local->chanctx_mtx);
1906 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
1908 struct ieee80211_local *local = sdata->local;
1909 struct sta_info *sta;
1912 mutex_lock(&local->sta_mtx);
1913 list_for_each_entry(sta, &local->sta_list, list) {
1914 enum ieee80211_sta_state state;
1916 if (!sta->uploaded || sta->sdata != sdata)
1919 for (state = IEEE80211_STA_NOTEXIST;
1920 state < sta->sta_state; state++)
1921 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1924 mutex_unlock(&local->sta_mtx);
1927 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
1929 struct cfg80211_nan_func *func, **funcs;
1932 res = drv_start_nan(sdata->local, sdata,
1933 &sdata->u.nan.conf);
1937 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
1943 /* Add all the functions:
1944 * This is a little bit ugly. We need to call a potentially sleeping
1945 * callback for each NAN function, so we can't hold the spinlock.
1947 spin_lock_bh(&sdata->u.nan.func_lock);
1949 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
1952 spin_unlock_bh(&sdata->u.nan.func_lock);
1954 for (i = 0; funcs[i]; i++) {
1955 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
1957 ieee80211_nan_func_terminated(&sdata->vif,
1958 funcs[i]->instance_id,
1959 NL80211_NAN_FUNC_TERM_REASON_ERROR,
1968 int ieee80211_reconfig(struct ieee80211_local *local)
1970 struct ieee80211_hw *hw = &local->hw;
1971 struct ieee80211_sub_if_data *sdata;
1972 struct ieee80211_chanctx *ctx;
1973 struct sta_info *sta;
1975 bool reconfig_due_to_wowlan = false;
1976 struct ieee80211_sub_if_data *sched_scan_sdata;
1977 struct cfg80211_sched_scan_request *sched_scan_req;
1978 bool sched_scan_stopped = false;
1979 bool suspended = local->suspended;
1981 /* nothing to do if HW shouldn't run */
1982 if (!local->open_count)
1987 local->resuming = true;
1989 if (local->wowlan) {
1991 * In the wowlan case, both mac80211 and the device
1992 * are functional when the resume op is called, so
1993 * clear local->suspended so the device could operate
1994 * normally (e.g. pass rx frames).
1996 local->suspended = false;
1997 res = drv_resume(local);
1998 local->wowlan = false;
2000 local->resuming = false;
2007 * res is 1, which means the driver requested
2008 * to go through a regular reset on wakeup.
2009 * restore local->suspended in this case.
2011 reconfig_due_to_wowlan = true;
2012 local->suspended = true;
2017 * In case of hw_restart during suspend (without wowlan),
2018 * cancel restart work, as we are reconfiguring the device
2020 * Note that restart_work is scheduled on a frozen workqueue,
2021 * so we can't deadlock in this case.
2023 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2024 cancel_work_sync(&local->restart_work);
2026 local->started = false;
2029 * Upon resume hardware can sometimes be goofy due to
2030 * various platform / driver / bus issues, so restarting
2031 * the device may at times not work immediately. Propagate
2034 res = drv_start(local);
2037 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2039 WARN(1, "Hardware became unavailable during restart.\n");
2040 ieee80211_handle_reconfig_failure(local);
2044 /* setup fragmentation threshold */
2045 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2047 /* setup RTS threshold */
2048 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2050 /* reset coverage class */
2051 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2053 ieee80211_led_radio(local, true);
2054 ieee80211_mod_tpt_led_trig(local,
2055 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2057 /* add interfaces */
2058 sdata = rtnl_dereference(local->monitor_sdata);
2060 /* in HW restart it exists already */
2061 WARN_ON(local->resuming);
2062 res = drv_add_interface(local, sdata);
2064 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2070 list_for_each_entry(sdata, &local->interfaces, list) {
2071 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2072 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2073 ieee80211_sdata_running(sdata)) {
2074 res = drv_add_interface(local, sdata);
2080 /* If adding any of the interfaces failed above, roll back and
2084 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2086 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2087 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2088 ieee80211_sdata_running(sdata))
2089 drv_remove_interface(local, sdata);
2090 ieee80211_handle_reconfig_failure(local);
2094 /* add channel contexts */
2095 if (local->use_chanctx) {
2096 mutex_lock(&local->chanctx_mtx);
2097 list_for_each_entry(ctx, &local->chanctx_list, list)
2098 if (ctx->replace_state !=
2099 IEEE80211_CHANCTX_REPLACES_OTHER)
2100 WARN_ON(drv_add_chanctx(local, ctx));
2101 mutex_unlock(&local->chanctx_mtx);
2103 sdata = rtnl_dereference(local->monitor_sdata);
2104 if (sdata && ieee80211_sdata_running(sdata))
2105 ieee80211_assign_chanctx(local, sdata);
2108 /* reconfigure hardware */
2109 ieee80211_hw_config(local, ~0);
2111 ieee80211_configure_filter(local);
2113 /* Finally also reconfigure all the BSS information */
2114 list_for_each_entry(sdata, &local->interfaces, list) {
2117 if (!ieee80211_sdata_running(sdata))
2120 ieee80211_assign_chanctx(local, sdata);
2122 switch (sdata->vif.type) {
2123 case NL80211_IFTYPE_AP_VLAN:
2124 case NL80211_IFTYPE_MONITOR:
2127 ieee80211_reconfig_stations(sdata);
2129 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2130 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2131 drv_conf_tx(local, sdata, i,
2132 &sdata->tx_conf[i]);
2136 /* common change flags for all interface types */
2137 changed = BSS_CHANGED_ERP_CTS_PROT |
2138 BSS_CHANGED_ERP_PREAMBLE |
2139 BSS_CHANGED_ERP_SLOT |
2141 BSS_CHANGED_BASIC_RATES |
2142 BSS_CHANGED_BEACON_INT |
2147 BSS_CHANGED_TXPOWER |
2148 BSS_CHANGED_MCAST_RATE;
2150 if (sdata->vif.mu_mimo_owner)
2151 changed |= BSS_CHANGED_MU_GROUPS;
2153 switch (sdata->vif.type) {
2154 case NL80211_IFTYPE_STATION:
2155 changed |= BSS_CHANGED_ASSOC |
2156 BSS_CHANGED_ARP_FILTER |
2159 /* Re-send beacon info report to the driver */
2160 if (sdata->u.mgd.have_beacon)
2161 changed |= BSS_CHANGED_BEACON_INFO;
2163 if (sdata->vif.bss_conf.max_idle_period ||
2164 sdata->vif.bss_conf.protected_keep_alive)
2165 changed |= BSS_CHANGED_KEEP_ALIVE;
2168 ieee80211_bss_info_change_notify(sdata, changed);
2169 sdata_unlock(sdata);
2171 case NL80211_IFTYPE_OCB:
2172 changed |= BSS_CHANGED_OCB;
2173 ieee80211_bss_info_change_notify(sdata, changed);
2175 case NL80211_IFTYPE_ADHOC:
2176 changed |= BSS_CHANGED_IBSS;
2178 case NL80211_IFTYPE_AP:
2179 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2181 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2182 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2183 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2184 changed |= BSS_CHANGED_FTM_RESPONDER;
2186 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2187 changed |= BSS_CHANGED_AP_PROBE_RESP;
2189 if (rcu_access_pointer(sdata->u.ap.beacon))
2190 drv_start_ap(local, sdata);
2194 case NL80211_IFTYPE_MESH_POINT:
2195 if (sdata->vif.bss_conf.enable_beacon) {
2196 changed |= BSS_CHANGED_BEACON |
2197 BSS_CHANGED_BEACON_ENABLED;
2198 ieee80211_bss_info_change_notify(sdata, changed);
2201 case NL80211_IFTYPE_NAN:
2202 res = ieee80211_reconfig_nan(sdata);
2204 ieee80211_handle_reconfig_failure(local);
2208 case NL80211_IFTYPE_WDS:
2209 case NL80211_IFTYPE_AP_VLAN:
2210 case NL80211_IFTYPE_MONITOR:
2211 case NL80211_IFTYPE_P2P_DEVICE:
2214 case NL80211_IFTYPE_UNSPECIFIED:
2215 case NUM_NL80211_IFTYPES:
2216 case NL80211_IFTYPE_P2P_CLIENT:
2217 case NL80211_IFTYPE_P2P_GO:
2223 ieee80211_recalc_ps(local);
2226 * The sta might be in psm against the ap (e.g. because
2227 * this was the state before a hw restart), so we
2228 * explicitly send a null packet in order to make sure
2229 * it'll sync against the ap (and get out of psm).
2231 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2232 list_for_each_entry(sdata, &local->interfaces, list) {
2233 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2235 if (!sdata->u.mgd.associated)
2238 ieee80211_send_nullfunc(local, sdata, false);
2242 /* APs are now beaconing, add back stations */
2243 mutex_lock(&local->sta_mtx);
2244 list_for_each_entry(sta, &local->sta_list, list) {
2245 enum ieee80211_sta_state state;
2250 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2251 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2254 for (state = IEEE80211_STA_NOTEXIST;
2255 state < sta->sta_state; state++)
2256 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2259 mutex_unlock(&local->sta_mtx);
2262 list_for_each_entry(sdata, &local->interfaces, list)
2263 ieee80211_reset_crypto_tx_tailroom(sdata);
2265 list_for_each_entry(sdata, &local->interfaces, list)
2266 if (ieee80211_sdata_running(sdata))
2267 ieee80211_enable_keys(sdata);
2269 /* Reconfigure sched scan if it was interrupted by FW restart */
2270 mutex_lock(&local->mtx);
2271 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2272 lockdep_is_held(&local->mtx));
2273 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2274 lockdep_is_held(&local->mtx));
2275 if (sched_scan_sdata && sched_scan_req)
2277 * Sched scan stopped, but we don't want to report it. Instead,
2278 * we're trying to reschedule. However, if more than one scan
2279 * plan was set, we cannot reschedule since we don't know which
2280 * scan plan was currently running (and some scan plans may have
2281 * already finished).
2283 if (sched_scan_req->n_scan_plans > 1 ||
2284 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2286 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2287 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2288 sched_scan_stopped = true;
2290 mutex_unlock(&local->mtx);
2292 if (sched_scan_stopped)
2293 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy, 0);
2297 if (local->monitors == local->open_count && local->monitors > 0)
2298 ieee80211_add_virtual_monitor(local);
2301 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2302 * sessions can be established after a resume.
2304 * Also tear down aggregation sessions since reconfiguring
2305 * them in a hardware restart scenario is not easily done
2306 * right now, and the hardware will have lost information
2307 * about the sessions, but we and the AP still think they
2308 * are active. This is really a workaround though.
2310 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2311 mutex_lock(&local->sta_mtx);
2313 list_for_each_entry(sta, &local->sta_list, list) {
2314 if (!local->resuming)
2315 ieee80211_sta_tear_down_BA_sessions(
2316 sta, AGG_STOP_LOCAL_REQUEST);
2317 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2320 mutex_unlock(&local->sta_mtx);
2323 if (local->in_reconfig) {
2324 local->in_reconfig = false;
2327 /* Restart deferred ROCs */
2328 mutex_lock(&local->mtx);
2329 ieee80211_start_next_roc(local);
2330 mutex_unlock(&local->mtx);
2333 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2334 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2338 * If this is for hw restart things are still running.
2339 * We may want to change that later, however.
2341 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2342 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2348 /* first set suspended false, then resuming */
2349 local->suspended = false;
2351 local->resuming = false;
2353 ieee80211_flush_completed_scan(local, false);
2355 if (local->open_count && !reconfig_due_to_wowlan)
2356 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2358 list_for_each_entry(sdata, &local->interfaces, list) {
2359 if (!ieee80211_sdata_running(sdata))
2361 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2362 ieee80211_sta_restart(sdata);
2365 mod_timer(&local->sta_cleanup, jiffies + 1);
2373 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2375 struct ieee80211_sub_if_data *sdata;
2376 struct ieee80211_local *local;
2377 struct ieee80211_key *key;
2382 sdata = vif_to_sdata(vif);
2383 local = sdata->local;
2385 if (WARN_ON(!local->resuming))
2388 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2391 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2393 mutex_lock(&local->key_mtx);
2394 list_for_each_entry(key, &sdata->key_list, list)
2395 key->flags |= KEY_FLAG_TAINTED;
2396 mutex_unlock(&local->key_mtx);
2398 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2400 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2402 struct ieee80211_local *local = sdata->local;
2403 struct ieee80211_chanctx_conf *chanctx_conf;
2404 struct ieee80211_chanctx *chanctx;
2406 mutex_lock(&local->chanctx_mtx);
2408 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2409 lockdep_is_held(&local->chanctx_mtx));
2412 * This function can be called from a work, thus it may be possible
2413 * that the chanctx_conf is removed (due to a disconnection, for
2415 * So nothing should be done in such case.
2420 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2421 ieee80211_recalc_smps_chanctx(local, chanctx);
2423 mutex_unlock(&local->chanctx_mtx);
2426 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2428 struct ieee80211_local *local = sdata->local;
2429 struct ieee80211_chanctx_conf *chanctx_conf;
2430 struct ieee80211_chanctx *chanctx;
2432 mutex_lock(&local->chanctx_mtx);
2434 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2435 lockdep_is_held(&local->chanctx_mtx));
2437 if (WARN_ON_ONCE(!chanctx_conf))
2440 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2441 ieee80211_recalc_chanctx_min_def(local, chanctx);
2443 mutex_unlock(&local->chanctx_mtx);
2446 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2448 size_t pos = offset;
2450 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2451 pos += 2 + ies[pos + 1];
2456 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2460 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2462 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2466 * Scale up threshold values before storing it, as the RSSI averaging
2467 * algorithm uses a scaled up value as well. Change this scaling
2468 * factor if the RSSI averaging algorithm changes.
2470 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2471 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2474 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2478 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2480 WARN_ON(rssi_min_thold == rssi_max_thold ||
2481 rssi_min_thold > rssi_max_thold);
2483 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2486 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2488 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2490 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2492 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2494 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2496 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2501 *pos++ = WLAN_EID_HT_CAPABILITY;
2502 *pos++ = sizeof(struct ieee80211_ht_cap);
2503 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2505 /* capability flags */
2506 tmp = cpu_to_le16(cap);
2507 memcpy(pos, &tmp, sizeof(u16));
2510 /* AMPDU parameters */
2511 *pos++ = ht_cap->ampdu_factor |
2512 (ht_cap->ampdu_density <<
2513 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2516 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2517 pos += sizeof(ht_cap->mcs);
2519 /* extended capabilities */
2520 pos += sizeof(__le16);
2522 /* BF capabilities */
2523 pos += sizeof(__le32);
2525 /* antenna selection */
2531 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2536 *pos++ = WLAN_EID_VHT_CAPABILITY;
2537 *pos++ = sizeof(struct ieee80211_vht_cap);
2538 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2540 /* capability flags */
2541 tmp = cpu_to_le32(cap);
2542 memcpy(pos, &tmp, sizeof(u32));
2546 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2547 pos += sizeof(vht_cap->vht_mcs);
2552 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2553 const struct ieee80211_sta_he_cap *he_cap,
2560 /* Make sure we have place for the IE */
2562 * TODO: the 1 added is because this temporarily is under the EXTENSION
2563 * IE. Get rid of it when it moves.
2568 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2570 sizeof(he_cap->he_cap_elem) + n +
2571 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2572 he_cap->he_cap_elem.phy_cap_info);
2574 if ((end - pos) < ie_len)
2577 *pos++ = WLAN_EID_EXTENSION;
2578 pos++; /* We'll set the size later below */
2579 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2582 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2583 pos += sizeof(he_cap->he_cap_elem);
2585 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2588 /* Check if PPE Threshold should be present */
2589 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2590 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2594 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2595 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2597 n = hweight8(he_cap->ppe_thres[0] &
2598 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2599 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2600 IEEE80211_PPE_THRES_NSS_POS));
2603 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2606 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2607 n = DIV_ROUND_UP(n, 8);
2609 /* Copy PPE Thresholds */
2610 memcpy(pos, &he_cap->ppe_thres, n);
2614 orig_pos[1] = (pos - orig_pos) - 2;
2618 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2619 const struct cfg80211_chan_def *chandef,
2620 u16 prot_mode, bool rifs_mode)
2622 struct ieee80211_ht_operation *ht_oper;
2623 /* Build HT Information */
2624 *pos++ = WLAN_EID_HT_OPERATION;
2625 *pos++ = sizeof(struct ieee80211_ht_operation);
2626 ht_oper = (struct ieee80211_ht_operation *)pos;
2627 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2628 chandef->chan->center_freq);
2629 switch (chandef->width) {
2630 case NL80211_CHAN_WIDTH_160:
2631 case NL80211_CHAN_WIDTH_80P80:
2632 case NL80211_CHAN_WIDTH_80:
2633 case NL80211_CHAN_WIDTH_40:
2634 if (chandef->center_freq1 > chandef->chan->center_freq)
2635 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2637 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2640 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2643 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2644 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2645 chandef->width != NL80211_CHAN_WIDTH_20)
2646 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2649 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2651 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2652 ht_oper->stbc_param = 0x0000;
2654 /* It seems that Basic MCS set and Supported MCS set
2655 are identical for the first 10 bytes */
2656 memset(&ht_oper->basic_set, 0, 16);
2657 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2659 return pos + sizeof(struct ieee80211_ht_operation);
2662 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
2663 const struct cfg80211_chan_def *chandef)
2665 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
2666 *pos++ = 3; /* IE length */
2667 /* New channel width */
2668 switch (chandef->width) {
2669 case NL80211_CHAN_WIDTH_80:
2670 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
2672 case NL80211_CHAN_WIDTH_160:
2673 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
2675 case NL80211_CHAN_WIDTH_80P80:
2676 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2679 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
2682 /* new center frequency segment 0 */
2683 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
2684 /* new center frequency segment 1 */
2685 if (chandef->center_freq2)
2686 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
2691 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2692 const struct cfg80211_chan_def *chandef)
2694 struct ieee80211_vht_operation *vht_oper;
2696 *pos++ = WLAN_EID_VHT_OPERATION;
2697 *pos++ = sizeof(struct ieee80211_vht_operation);
2698 vht_oper = (struct ieee80211_vht_operation *)pos;
2699 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
2700 chandef->center_freq1);
2701 if (chandef->center_freq2)
2702 vht_oper->center_freq_seg1_idx =
2703 ieee80211_frequency_to_channel(chandef->center_freq2);
2705 vht_oper->center_freq_seg1_idx = 0x00;
2707 switch (chandef->width) {
2708 case NL80211_CHAN_WIDTH_160:
2710 * Convert 160 MHz channel width to new style as interop
2713 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2714 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
2715 if (chandef->chan->center_freq < chandef->center_freq1)
2716 vht_oper->center_freq_seg0_idx -= 8;
2718 vht_oper->center_freq_seg0_idx += 8;
2720 case NL80211_CHAN_WIDTH_80P80:
2722 * Convert 80+80 MHz channel width to new style as interop
2725 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2727 case NL80211_CHAN_WIDTH_80:
2728 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2731 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2735 /* don't require special VHT peer rates */
2736 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2738 return pos + sizeof(struct ieee80211_vht_operation);
2741 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
2742 struct cfg80211_chan_def *chandef)
2744 enum nl80211_channel_type channel_type;
2749 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2750 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2751 channel_type = NL80211_CHAN_HT20;
2753 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2754 channel_type = NL80211_CHAN_HT40PLUS;
2756 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2757 channel_type = NL80211_CHAN_HT40MINUS;
2760 channel_type = NL80211_CHAN_NO_HT;
2764 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
2768 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw,
2769 const struct ieee80211_vht_operation *oper,
2770 const struct ieee80211_ht_operation *htop,
2771 struct cfg80211_chan_def *chandef)
2773 struct cfg80211_chan_def new = *chandef;
2775 int ccfs0, ccfs1, ccfs2;
2781 ccfs0 = oper->center_freq_seg0_idx;
2782 ccfs1 = oper->center_freq_seg1_idx;
2783 ccfs2 = (le16_to_cpu(htop->operation_mode) &
2784 IEEE80211_HT_OP_MODE_CCFS2_MASK)
2785 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
2787 /* when parsing (and we know how to) CCFS1 and CCFS2 are equivalent */
2790 if (!ccfs1 && ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
2793 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
2794 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
2796 switch (oper->chan_width) {
2797 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2798 /* just use HT information directly */
2800 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2801 new.width = NL80211_CHAN_WIDTH_80;
2802 new.center_freq1 = cf0;
2803 /* If needed, adjust based on the newer interop workaround. */
2807 diff = abs(ccf1 - ccf0);
2809 new.width = NL80211_CHAN_WIDTH_160;
2810 new.center_freq1 = cf1;
2811 } else if (diff > 8) {
2812 new.width = NL80211_CHAN_WIDTH_80P80;
2813 new.center_freq2 = cf1;
2817 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2818 /* deprecated encoding */
2819 new.width = NL80211_CHAN_WIDTH_160;
2820 new.center_freq1 = cf0;
2822 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2823 /* deprecated encoding */
2824 new.width = NL80211_CHAN_WIDTH_80P80;
2825 new.center_freq1 = cf0;
2826 new.center_freq2 = cf1;
2832 if (!cfg80211_chandef_valid(&new))
2839 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2840 const struct ieee80211_supported_band *sband,
2841 const u8 *srates, int srates_len, u32 *rates)
2843 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2844 int shift = ieee80211_chandef_get_shift(chandef);
2845 struct ieee80211_rate *br;
2846 int brate, rate, i, j, count = 0;
2850 for (i = 0; i < srates_len; i++) {
2851 rate = srates[i] & 0x7f;
2853 for (j = 0; j < sband->n_bitrates; j++) {
2854 br = &sband->bitrates[j];
2855 if ((rate_flags & br->flags) != rate_flags)
2858 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2859 if (brate == rate) {
2869 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2870 struct sk_buff *skb, bool need_basic,
2871 enum nl80211_band band)
2873 struct ieee80211_local *local = sdata->local;
2874 struct ieee80211_supported_band *sband;
2877 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2880 shift = ieee80211_vif_get_shift(&sdata->vif);
2881 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2882 sband = local->hw.wiphy->bands[band];
2884 for (i = 0; i < sband->n_bitrates; i++) {
2885 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2892 if (skb_tailroom(skb) < rates + 2)
2895 pos = skb_put(skb, rates + 2);
2896 *pos++ = WLAN_EID_SUPP_RATES;
2898 for (i = 0; i < rates; i++) {
2900 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2903 if (need_basic && basic_rates & BIT(i))
2905 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2907 *pos++ = basic | (u8) rate;
2913 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2914 struct sk_buff *skb, bool need_basic,
2915 enum nl80211_band band)
2917 struct ieee80211_local *local = sdata->local;
2918 struct ieee80211_supported_band *sband;
2920 u8 i, exrates, *pos;
2921 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2924 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2925 shift = ieee80211_vif_get_shift(&sdata->vif);
2927 sband = local->hw.wiphy->bands[band];
2929 for (i = 0; i < sband->n_bitrates; i++) {
2930 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2940 if (skb_tailroom(skb) < exrates + 2)
2944 pos = skb_put(skb, exrates + 2);
2945 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2947 for (i = 8; i < sband->n_bitrates; i++) {
2949 if ((rate_flags & sband->bitrates[i].flags)
2952 if (need_basic && basic_rates & BIT(i))
2954 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2956 *pos++ = basic | (u8) rate;
2962 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2964 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2965 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2967 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2968 /* non-managed type inferfaces */
2971 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2973 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2975 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2980 /* TODO: consider rx_highest */
2982 if (mcs->rx_mask[3])
2984 if (mcs->rx_mask[2])
2986 if (mcs->rx_mask[1])
2992 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2993 * @local: mac80211 hw info struct
2994 * @status: RX status
2995 * @mpdu_len: total MPDU length (including FCS)
2996 * @mpdu_offset: offset into MPDU to calculate timestamp at
2998 * This function calculates the RX timestamp at the given MPDU offset, taking
2999 * into account what the RX timestamp was. An offset of 0 will just normalize
3000 * the timestamp to TSF at beginning of MPDU reception.
3002 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3003 struct ieee80211_rx_status *status,
3004 unsigned int mpdu_len,
3005 unsigned int mpdu_offset)
3007 u64 ts = status->mactime;
3008 struct rate_info ri;
3011 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3014 memset(&ri, 0, sizeof(ri));
3018 /* Fill cfg80211 rate info */
3019 switch (status->encoding) {
3021 ri.mcs = status->rate_idx;
3022 ri.flags |= RATE_INFO_FLAGS_MCS;
3023 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3024 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3027 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3028 ri.mcs = status->rate_idx;
3029 ri.nss = status->nss;
3030 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3031 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3036 case RX_ENC_LEGACY: {
3037 struct ieee80211_supported_band *sband;
3041 switch (status->bw) {
3042 case RATE_INFO_BW_10:
3045 case RATE_INFO_BW_5:
3050 sband = local->hw.wiphy->bands[status->band];
3051 bitrate = sband->bitrates[status->rate_idx].bitrate;
3052 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3054 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3055 /* TODO: handle HT/VHT preambles */
3056 if (status->band == NL80211_BAND_5GHZ) {
3059 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3069 rate = cfg80211_calculate_bitrate(&ri);
3070 if (WARN_ONCE(!rate,
3071 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3072 (unsigned long long)status->flag, status->rate_idx,
3076 /* rewind from end of MPDU */
3077 if (status->flag & RX_FLAG_MACTIME_END)
3078 ts -= mpdu_len * 8 * 10 / rate;
3080 ts += mpdu_offset * 8 * 10 / rate;
3085 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3087 struct ieee80211_sub_if_data *sdata;
3088 struct cfg80211_chan_def chandef;
3090 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3093 mutex_lock(&local->mtx);
3094 list_for_each_entry(sdata, &local->interfaces, list) {
3095 /* it might be waiting for the local->mtx, but then
3096 * by the time it gets it, sdata->wdev.cac_started
3097 * will no longer be true
3099 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3101 if (sdata->wdev.cac_started) {
3102 chandef = sdata->vif.bss_conf.chandef;
3103 ieee80211_vif_release_channel(sdata);
3104 cfg80211_cac_event(sdata->dev,
3106 NL80211_RADAR_CAC_ABORTED,
3110 mutex_unlock(&local->mtx);
3113 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3115 struct ieee80211_local *local =
3116 container_of(work, struct ieee80211_local, radar_detected_work);
3117 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3118 struct ieee80211_chanctx *ctx;
3119 int num_chanctx = 0;
3121 mutex_lock(&local->chanctx_mtx);
3122 list_for_each_entry(ctx, &local->chanctx_list, list) {
3123 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3127 chandef = ctx->conf.def;
3129 mutex_unlock(&local->chanctx_mtx);
3132 ieee80211_dfs_cac_cancel(local);
3135 if (num_chanctx > 1)
3136 /* XXX: multi-channel is not supported yet */
3139 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3142 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3144 struct ieee80211_local *local = hw_to_local(hw);
3146 trace_api_radar_detected(local);
3148 schedule_work(&local->radar_detected_work);
3150 EXPORT_SYMBOL(ieee80211_radar_detected);
3152 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3158 case NL80211_CHAN_WIDTH_20:
3159 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3160 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3162 case NL80211_CHAN_WIDTH_40:
3163 c->width = NL80211_CHAN_WIDTH_20;
3164 c->center_freq1 = c->chan->center_freq;
3165 ret = IEEE80211_STA_DISABLE_40MHZ |
3166 IEEE80211_STA_DISABLE_VHT;
3168 case NL80211_CHAN_WIDTH_80:
3169 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3173 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3174 c->width = NL80211_CHAN_WIDTH_40;
3175 ret = IEEE80211_STA_DISABLE_VHT;
3177 case NL80211_CHAN_WIDTH_80P80:
3178 c->center_freq2 = 0;
3179 c->width = NL80211_CHAN_WIDTH_80;
3180 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3181 IEEE80211_STA_DISABLE_160MHZ;
3183 case NL80211_CHAN_WIDTH_160:
3185 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3188 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3189 c->width = NL80211_CHAN_WIDTH_80;
3190 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3191 IEEE80211_STA_DISABLE_160MHZ;
3194 case NL80211_CHAN_WIDTH_20_NOHT:
3196 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3197 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3199 case NL80211_CHAN_WIDTH_5:
3200 case NL80211_CHAN_WIDTH_10:
3203 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3207 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3213 * Returns true if smps_mode_new is strictly more restrictive than
3216 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3217 enum ieee80211_smps_mode smps_mode_new)
3219 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3220 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3223 switch (smps_mode_old) {
3224 case IEEE80211_SMPS_STATIC:
3226 case IEEE80211_SMPS_DYNAMIC:
3227 return smps_mode_new == IEEE80211_SMPS_STATIC;
3228 case IEEE80211_SMPS_OFF:
3229 return smps_mode_new != IEEE80211_SMPS_OFF;
3237 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3238 struct cfg80211_csa_settings *csa_settings)
3240 struct sk_buff *skb;
3241 struct ieee80211_mgmt *mgmt;
3242 struct ieee80211_local *local = sdata->local;
3244 int hdr_len = offsetofend(struct ieee80211_mgmt,
3245 u.action.u.chan_switch);
3248 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3249 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3252 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3253 5 + /* channel switch announcement element */
3254 3 + /* secondary channel offset element */
3255 5 + /* wide bandwidth channel switch announcement */
3256 8); /* mesh channel switch parameters element */
3260 skb_reserve(skb, local->tx_headroom);
3261 mgmt = skb_put_zero(skb, hdr_len);
3262 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3263 IEEE80211_STYPE_ACTION);
3265 eth_broadcast_addr(mgmt->da);
3266 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3267 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3268 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3270 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3271 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3273 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3274 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3275 pos = skb_put(skb, 5);
3276 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3277 *pos++ = 3; /* IE length */
3278 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3279 freq = csa_settings->chandef.chan->center_freq;
3280 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
3281 *pos++ = csa_settings->count; /* count */
3283 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
3284 enum nl80211_channel_type ch_type;
3287 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
3288 *pos++ = 1; /* IE length */
3289 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
3290 if (ch_type == NL80211_CHAN_HT40PLUS)
3291 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3293 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3296 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3297 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
3300 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
3301 *pos++ = 6; /* IE length */
3302 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
3303 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
3304 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
3305 *pos++ |= csa_settings->block_tx ?
3306 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
3307 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
3309 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
3313 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
3314 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
3315 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
3317 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
3320 ieee80211_tx_skb(sdata, skb);
3324 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
3326 return !(cs == NULL || cs->cipher == 0 ||
3327 cs->hdr_len < cs->pn_len + cs->pn_off ||
3328 cs->hdr_len <= cs->key_idx_off ||
3329 cs->key_idx_shift > 7 ||
3330 cs->key_idx_mask == 0);
3333 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
3337 /* Ensure we have enough iftype bitmap space for all iftype values */
3338 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
3340 for (i = 0; i < n; i++)
3341 if (!ieee80211_cs_valid(&cs[i]))
3347 const struct ieee80211_cipher_scheme *
3348 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
3349 enum nl80211_iftype iftype)
3351 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
3352 int n = local->hw.n_cipher_schemes;
3354 const struct ieee80211_cipher_scheme *cs = NULL;
3356 for (i = 0; i < n; i++) {
3357 if (l[i].cipher == cipher) {
3363 if (!cs || !(cs->iftype & BIT(iftype)))
3369 int ieee80211_cs_headroom(struct ieee80211_local *local,
3370 struct cfg80211_crypto_settings *crypto,
3371 enum nl80211_iftype iftype)
3373 const struct ieee80211_cipher_scheme *cs;
3374 int headroom = IEEE80211_ENCRYPT_HEADROOM;
3377 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
3378 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
3381 if (cs && headroom < cs->hdr_len)
3382 headroom = cs->hdr_len;
3385 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
3386 if (cs && headroom < cs->hdr_len)
3387 headroom = cs->hdr_len;
3393 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
3395 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
3402 if (data->count[i] == 1)
3405 if (data->desc[i].interval == 0)
3408 /* End time is in the past, check for repetitions */
3409 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
3410 if (data->count[i] < 255) {
3411 if (data->count[i] <= skip) {
3416 data->count[i] -= skip;
3419 data->desc[i].start += skip * data->desc[i].interval;
3425 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3431 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3434 if (!data->count[i])
3437 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3440 cur = data->desc[i].start - tsf;
3444 cur = data->desc[i].start + data->desc[i].duration - tsf;
3453 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3458 * arbitrary limit, used to avoid infinite loops when combined NoA
3459 * descriptors cover the full time period.
3463 ieee80211_extend_absent_time(data, tsf, &offset);
3465 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3469 } while (tries < max_tries);
3474 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3476 u32 next_offset = BIT(31) - 1;
3480 data->has_next_tsf = false;
3481 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3484 if (!data->count[i])
3487 ieee80211_extend_noa_desc(data, tsf, i);
3488 start = data->desc[i].start - tsf;
3490 data->absent |= BIT(i);
3492 if (next_offset > start)
3493 next_offset = start;
3495 data->has_next_tsf = true;
3499 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3501 data->next_tsf = tsf + next_offset;
3503 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3505 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3506 struct ieee80211_noa_data *data, u32 tsf)
3511 memset(data, 0, sizeof(*data));
3513 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3514 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3516 if (!desc->count || !desc->duration)
3519 data->count[i] = desc->count;
3520 data->desc[i].start = le32_to_cpu(desc->start_time);
3521 data->desc[i].duration = le32_to_cpu(desc->duration);
3522 data->desc[i].interval = le32_to_cpu(desc->interval);
3524 if (data->count[i] > 1 &&
3525 data->desc[i].interval < data->desc[i].duration)
3528 ieee80211_extend_noa_desc(data, tsf, i);
3533 ieee80211_update_p2p_noa(data, tsf);
3537 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3539 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3540 struct ieee80211_sub_if_data *sdata)
3542 u64 tsf = drv_get_tsf(local, sdata);
3544 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3545 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3549 if (tsf == -1ULL || !beacon_int || !dtim_period)
3552 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3553 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3557 ps = &sdata->bss->ps;
3558 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3559 ps = &sdata->u.mesh.ps;
3565 * actually finds last dtim_count, mac80211 will update in
3566 * __beacon_add_tim().
3567 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3569 do_div(tsf, beacon_int);
3570 bcns_from_dtim = do_div(tsf, dtim_period);
3571 /* just had a DTIM */
3572 if (!bcns_from_dtim)
3575 dtim_count = dtim_period - bcns_from_dtim;
3577 ps->dtim_count = dtim_count;
3580 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3581 struct ieee80211_chanctx *ctx)
3583 struct ieee80211_sub_if_data *sdata;
3584 u8 radar_detect = 0;
3586 lockdep_assert_held(&local->chanctx_mtx);
3588 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3591 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3592 if (sdata->reserved_radar_required)
3593 radar_detect |= BIT(sdata->reserved_chandef.width);
3596 * An in-place reservation context should not have any assigned vifs
3597 * until it replaces the other context.
3599 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3600 !list_empty(&ctx->assigned_vifs));
3602 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3603 if (sdata->radar_required)
3604 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3606 return radar_detect;
3609 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3610 const struct cfg80211_chan_def *chandef,
3611 enum ieee80211_chanctx_mode chanmode,
3614 struct ieee80211_local *local = sdata->local;
3615 struct ieee80211_sub_if_data *sdata_iter;
3616 enum nl80211_iftype iftype = sdata->wdev.iftype;
3617 struct ieee80211_chanctx *ctx;
3619 struct iface_combination_params params = {
3620 .radar_detect = radar_detect,
3623 lockdep_assert_held(&local->chanctx_mtx);
3625 if (WARN_ON(hweight32(radar_detect) > 1))
3628 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3632 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3635 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3636 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
3638 * always passing this is harmless, since it'll be the
3639 * same value that cfg80211 finds if it finds the same
3640 * interface ... and that's always allowed
3642 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
3645 /* Always allow software iftypes */
3646 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3653 params.num_different_channels = 1;
3655 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3656 params.iftype_num[iftype] = 1;
3658 list_for_each_entry(ctx, &local->chanctx_list, list) {
3659 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3661 params.radar_detect |=
3662 ieee80211_chanctx_radar_detect(local, ctx);
3663 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3664 params.num_different_channels++;
3667 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3668 cfg80211_chandef_compatible(chandef,
3671 params.num_different_channels++;
3674 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3675 struct wireless_dev *wdev_iter;
3677 wdev_iter = &sdata_iter->wdev;
3679 if (sdata_iter == sdata ||
3680 !ieee80211_sdata_running(sdata_iter) ||
3681 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3684 params.iftype_num[wdev_iter->iftype]++;
3688 if (total == 1 && !params.radar_detect)
3691 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
3695 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3698 u32 *max_num_different_channels = data;
3700 *max_num_different_channels = max(*max_num_different_channels,
3701 c->num_different_channels);
3704 int ieee80211_max_num_channels(struct ieee80211_local *local)
3706 struct ieee80211_sub_if_data *sdata;
3707 struct ieee80211_chanctx *ctx;
3708 u32 max_num_different_channels = 1;
3710 struct iface_combination_params params = {0};
3712 lockdep_assert_held(&local->chanctx_mtx);
3714 list_for_each_entry(ctx, &local->chanctx_list, list) {
3715 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3718 params.num_different_channels++;
3720 params.radar_detect |=
3721 ieee80211_chanctx_radar_detect(local, ctx);
3724 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3725 params.iftype_num[sdata->wdev.iftype]++;
3727 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
3728 ieee80211_iter_max_chans,
3729 &max_num_different_channels);
3733 return max_num_different_channels;
3736 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3738 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3739 *buf++ = 7; /* len */
3740 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3743 *buf++ = 2; /* WME */
3744 *buf++ = 0; /* WME info */
3745 *buf++ = 1; /* WME ver */
3746 *buf++ = qosinfo; /* U-APSD no in use */
3751 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
3752 unsigned long *frame_cnt,
3753 unsigned long *byte_cnt)
3755 struct txq_info *txqi = to_txq_info(txq);
3756 u32 frag_cnt = 0, frag_bytes = 0;
3757 struct sk_buff *skb;
3759 skb_queue_walk(&txqi->frags, skb) {
3761 frag_bytes += skb->len;
3765 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
3768 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
3770 EXPORT_SYMBOL(ieee80211_txq_get_depth);
3772 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
3773 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
3774 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
3775 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
3776 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK