1 // SPDX-License-Identifier: GPL-2.0-only
3 * Copyright 2002-2005, Instant802 Networks, Inc.
4 * Copyright 2005-2006, Devicescape Software, Inc.
5 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
6 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
7 * Copyright 2013-2014 Intel Mobile Communications GmbH
8 * Copyright (C) 2015-2017 Intel Deutschland GmbH
9 * Copyright (C) 2018-2020 Intel Corporation
11 * utilities for mac80211
14 #include <net/mac80211.h>
15 #include <linux/netdevice.h>
16 #include <linux/export.h>
17 #include <linux/types.h>
18 #include <linux/slab.h>
19 #include <linux/skbuff.h>
20 #include <linux/etherdevice.h>
21 #include <linux/if_arp.h>
22 #include <linux/bitmap.h>
23 #include <linux/crc32.h>
24 #include <net/net_namespace.h>
25 #include <net/cfg80211.h>
26 #include <net/rtnetlink.h>
28 #include "ieee80211_i.h"
29 #include "driver-ops.h"
36 /* privid for wiphys to determine whether they belong to us or not */
37 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
39 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
41 struct ieee80211_local *local;
43 local = wiphy_priv(wiphy);
46 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
48 u8 *ieee80211_get_bssid(struct ieee80211_hdr *hdr, size_t len,
49 enum nl80211_iftype type)
51 __le16 fc = hdr->frame_control;
53 if (ieee80211_is_data(fc)) {
54 if (len < 24) /* drop incorrect hdr len (data) */
57 if (ieee80211_has_a4(fc))
59 if (ieee80211_has_tods(fc))
61 if (ieee80211_has_fromds(fc))
67 if (ieee80211_is_s1g_beacon(fc)) {
68 struct ieee80211_ext *ext = (void *) hdr;
70 return ext->u.s1g_beacon.sa;
73 if (ieee80211_is_mgmt(fc)) {
74 if (len < 24) /* drop incorrect hdr len (mgmt) */
79 if (ieee80211_is_ctl(fc)) {
80 if (ieee80211_is_pspoll(fc))
83 if (ieee80211_is_back_req(fc)) {
85 case NL80211_IFTYPE_STATION:
87 case NL80211_IFTYPE_AP:
88 case NL80211_IFTYPE_AP_VLAN:
91 break; /* fall through to the return */
98 EXPORT_SYMBOL(ieee80211_get_bssid);
100 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
103 struct ieee80211_hdr *hdr;
105 skb_queue_walk(&tx->skbs, skb) {
106 hdr = (struct ieee80211_hdr *) skb->data;
107 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
111 int ieee80211_frame_duration(enum nl80211_band band, size_t len,
112 int rate, int erp, int short_preamble,
117 /* calculate duration (in microseconds, rounded up to next higher
118 * integer if it includes a fractional microsecond) to send frame of
119 * len bytes (does not include FCS) at the given rate. Duration will
122 * rate is in 100 kbps, so divident is multiplied by 10 in the
123 * DIV_ROUND_UP() operations.
125 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
126 * is assumed to be 0 otherwise.
129 if (band == NL80211_BAND_5GHZ || erp) {
133 * N_DBPS = DATARATE x 4
134 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
135 * (16 = SIGNAL time, 6 = tail bits)
136 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
139 * 802.11a - 18.5.2: aSIFSTime = 16 usec
140 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
141 * signal ext = 6 usec
143 dur = 16; /* SIFS + signal ext */
144 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
145 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
147 /* IEEE 802.11-2012 18.3.2.4: all values above are:
148 * * times 4 for 5 MHz
149 * * times 2 for 10 MHz
153 /* rates should already consider the channel bandwidth,
154 * don't apply divisor again.
156 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
157 4 * rate); /* T_SYM x N_SYM */
160 * 802.11b or 802.11g with 802.11b compatibility:
161 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
162 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
164 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
165 * aSIFSTime = 10 usec
166 * aPreambleLength = 144 usec or 72 usec with short preamble
167 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
169 dur = 10; /* aSIFSTime = 10 usec */
170 dur += short_preamble ? (72 + 24) : (144 + 48);
172 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
178 /* Exported duration function for driver use */
179 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
180 struct ieee80211_vif *vif,
181 enum nl80211_band band,
183 struct ieee80211_rate *rate)
185 struct ieee80211_sub_if_data *sdata;
188 bool short_preamble = false;
192 sdata = vif_to_sdata(vif);
193 short_preamble = sdata->vif.bss_conf.use_short_preamble;
194 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
195 erp = rate->flags & IEEE80211_RATE_ERP_G;
196 shift = ieee80211_vif_get_shift(vif);
199 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
200 short_preamble, shift);
202 return cpu_to_le16(dur);
204 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
206 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
207 struct ieee80211_vif *vif, size_t frame_len,
208 const struct ieee80211_tx_info *frame_txctl)
210 struct ieee80211_local *local = hw_to_local(hw);
211 struct ieee80211_rate *rate;
212 struct ieee80211_sub_if_data *sdata;
214 int erp, shift = 0, bitrate;
216 struct ieee80211_supported_band *sband;
218 sband = local->hw.wiphy->bands[frame_txctl->band];
220 short_preamble = false;
222 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
226 sdata = vif_to_sdata(vif);
227 short_preamble = sdata->vif.bss_conf.use_short_preamble;
228 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
229 erp = rate->flags & IEEE80211_RATE_ERP_G;
230 shift = ieee80211_vif_get_shift(vif);
233 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
236 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
237 erp, short_preamble, shift);
238 /* Data frame duration */
239 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
240 erp, short_preamble, shift);
242 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
243 erp, short_preamble, shift);
245 return cpu_to_le16(dur);
247 EXPORT_SYMBOL(ieee80211_rts_duration);
249 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
250 struct ieee80211_vif *vif,
252 const struct ieee80211_tx_info *frame_txctl)
254 struct ieee80211_local *local = hw_to_local(hw);
255 struct ieee80211_rate *rate;
256 struct ieee80211_sub_if_data *sdata;
258 int erp, shift = 0, bitrate;
260 struct ieee80211_supported_band *sband;
262 sband = local->hw.wiphy->bands[frame_txctl->band];
264 short_preamble = false;
266 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
269 sdata = vif_to_sdata(vif);
270 short_preamble = sdata->vif.bss_conf.use_short_preamble;
271 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
272 erp = rate->flags & IEEE80211_RATE_ERP_G;
273 shift = ieee80211_vif_get_shift(vif);
276 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
278 /* Data frame duration */
279 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
280 erp, short_preamble, shift);
281 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
283 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
284 erp, short_preamble, shift);
287 return cpu_to_le16(dur);
289 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
291 static void __ieee80211_wake_txqs(struct ieee80211_sub_if_data *sdata, int ac)
293 struct ieee80211_local *local = sdata->local;
294 struct ieee80211_vif *vif = &sdata->vif;
295 struct fq *fq = &local->fq;
296 struct ps_data *ps = NULL;
297 struct txq_info *txqi;
298 struct sta_info *sta;
302 spin_lock(&fq->lock);
304 if (sdata->vif.type == NL80211_IFTYPE_AP)
305 ps = &sdata->bss->ps;
307 sdata->vif.txqs_stopped[ac] = false;
309 list_for_each_entry_rcu(sta, &local->sta_list, list) {
310 if (sdata != sta->sdata)
313 for (i = 0; i < ARRAY_SIZE(sta->sta.txq); i++) {
314 struct ieee80211_txq *txq = sta->sta.txq[i];
319 txqi = to_txq_info(txq);
324 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX,
328 spin_unlock(&fq->lock);
329 drv_wake_tx_queue(local, txqi);
330 spin_lock(&fq->lock);
337 txqi = to_txq_info(vif->txq);
339 if (!test_and_clear_bit(IEEE80211_TXQ_STOP_NETIF_TX, &txqi->flags) ||
340 (ps && atomic_read(&ps->num_sta_ps)) || ac != vif->txq->ac)
343 spin_unlock(&fq->lock);
345 drv_wake_tx_queue(local, txqi);
349 spin_unlock(&fq->lock);
354 __releases(&local->queue_stop_reason_lock)
355 __acquires(&local->queue_stop_reason_lock)
356 _ieee80211_wake_txqs(struct ieee80211_local *local, unsigned long *flags)
358 struct ieee80211_sub_if_data *sdata;
359 int n_acs = IEEE80211_NUM_ACS;
364 if (local->hw.queues < IEEE80211_NUM_ACS)
367 for (i = 0; i < local->hw.queues; i++) {
368 if (local->queue_stop_reasons[i])
371 spin_unlock_irqrestore(&local->queue_stop_reason_lock, *flags);
372 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
375 for (ac = 0; ac < n_acs; ac++) {
376 int ac_queue = sdata->vif.hw_queue[ac];
379 sdata->vif.cab_queue == i)
380 __ieee80211_wake_txqs(sdata, ac);
383 spin_lock_irqsave(&local->queue_stop_reason_lock, *flags);
389 void ieee80211_wake_txqs(struct tasklet_struct *t)
391 struct ieee80211_local *local = from_tasklet(local, t,
395 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
396 _ieee80211_wake_txqs(local, &flags);
397 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
400 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
402 struct ieee80211_sub_if_data *sdata;
403 int n_acs = IEEE80211_NUM_ACS;
405 if (local->ops->wake_tx_queue)
408 if (local->hw.queues < IEEE80211_NUM_ACS)
411 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
417 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
418 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
421 for (ac = 0; ac < n_acs; ac++) {
422 int ac_queue = sdata->vif.hw_queue[ac];
424 if (ac_queue == queue ||
425 (sdata->vif.cab_queue == queue &&
426 local->queue_stop_reasons[ac_queue] == 0 &&
427 skb_queue_empty(&local->pending[ac_queue])))
428 netif_wake_subqueue(sdata->dev, ac);
433 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
434 enum queue_stop_reason reason,
436 unsigned long *flags)
438 struct ieee80211_local *local = hw_to_local(hw);
440 trace_wake_queue(local, queue, reason);
442 if (WARN_ON(queue >= hw->queues))
445 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
449 local->q_stop_reasons[queue][reason] = 0;
451 local->q_stop_reasons[queue][reason]--;
452 if (WARN_ON(local->q_stop_reasons[queue][reason] < 0))
453 local->q_stop_reasons[queue][reason] = 0;
456 if (local->q_stop_reasons[queue][reason] == 0)
457 __clear_bit(reason, &local->queue_stop_reasons[queue]);
459 if (local->queue_stop_reasons[queue] != 0)
460 /* someone still has this queue stopped */
463 if (skb_queue_empty(&local->pending[queue])) {
465 ieee80211_propagate_queue_wake(local, queue);
468 tasklet_schedule(&local->tx_pending_tasklet);
471 * Calling _ieee80211_wake_txqs here can be a problem because it may
472 * release queue_stop_reason_lock which has been taken by
473 * __ieee80211_wake_queue's caller. It is certainly not very nice to
474 * release someone's lock, but it is fine because all the callers of
475 * __ieee80211_wake_queue call it right before releasing the lock.
477 if (local->ops->wake_tx_queue) {
478 if (reason == IEEE80211_QUEUE_STOP_REASON_DRIVER)
479 tasklet_schedule(&local->wake_txqs_tasklet);
481 _ieee80211_wake_txqs(local, flags);
485 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
486 enum queue_stop_reason reason,
489 struct ieee80211_local *local = hw_to_local(hw);
492 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
493 __ieee80211_wake_queue(hw, queue, reason, refcounted, &flags);
494 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
497 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
499 ieee80211_wake_queue_by_reason(hw, queue,
500 IEEE80211_QUEUE_STOP_REASON_DRIVER,
503 EXPORT_SYMBOL(ieee80211_wake_queue);
505 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
506 enum queue_stop_reason reason,
509 struct ieee80211_local *local = hw_to_local(hw);
510 struct ieee80211_sub_if_data *sdata;
511 int n_acs = IEEE80211_NUM_ACS;
513 trace_stop_queue(local, queue, reason);
515 if (WARN_ON(queue >= hw->queues))
519 local->q_stop_reasons[queue][reason] = 1;
521 local->q_stop_reasons[queue][reason]++;
523 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
526 if (local->hw.queues < IEEE80211_NUM_ACS)
530 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
536 for (ac = 0; ac < n_acs; ac++) {
537 if (sdata->vif.hw_queue[ac] == queue ||
538 sdata->vif.cab_queue == queue) {
539 if (!local->ops->wake_tx_queue) {
540 netif_stop_subqueue(sdata->dev, ac);
543 spin_lock(&local->fq.lock);
544 sdata->vif.txqs_stopped[ac] = true;
545 spin_unlock(&local->fq.lock);
552 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
553 enum queue_stop_reason reason,
556 struct ieee80211_local *local = hw_to_local(hw);
559 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
560 __ieee80211_stop_queue(hw, queue, reason, refcounted);
561 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
564 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
566 ieee80211_stop_queue_by_reason(hw, queue,
567 IEEE80211_QUEUE_STOP_REASON_DRIVER,
570 EXPORT_SYMBOL(ieee80211_stop_queue);
572 void ieee80211_add_pending_skb(struct ieee80211_local *local,
575 struct ieee80211_hw *hw = &local->hw;
577 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
578 int queue = info->hw_queue;
580 if (WARN_ON(!info->control.vif)) {
581 ieee80211_free_txskb(&local->hw, skb);
585 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
586 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
588 __skb_queue_tail(&local->pending[queue], skb);
589 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
591 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
594 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
595 struct sk_buff_head *skbs)
597 struct ieee80211_hw *hw = &local->hw;
602 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
603 while ((skb = skb_dequeue(skbs))) {
604 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
606 if (WARN_ON(!info->control.vif)) {
607 ieee80211_free_txskb(&local->hw, skb);
611 queue = info->hw_queue;
613 __ieee80211_stop_queue(hw, queue,
614 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
617 __skb_queue_tail(&local->pending[queue], skb);
620 for (i = 0; i < hw->queues; i++)
621 __ieee80211_wake_queue(hw, i,
622 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
624 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
627 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
628 unsigned long queues,
629 enum queue_stop_reason reason,
632 struct ieee80211_local *local = hw_to_local(hw);
636 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
638 for_each_set_bit(i, &queues, hw->queues)
639 __ieee80211_stop_queue(hw, i, reason, refcounted);
641 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
644 void ieee80211_stop_queues(struct ieee80211_hw *hw)
646 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
647 IEEE80211_QUEUE_STOP_REASON_DRIVER,
650 EXPORT_SYMBOL(ieee80211_stop_queues);
652 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
654 struct ieee80211_local *local = hw_to_local(hw);
658 if (WARN_ON(queue >= hw->queues))
661 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
662 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
663 &local->queue_stop_reasons[queue]);
664 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
667 EXPORT_SYMBOL(ieee80211_queue_stopped);
669 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
670 unsigned long queues,
671 enum queue_stop_reason reason,
674 struct ieee80211_local *local = hw_to_local(hw);
678 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
680 for_each_set_bit(i, &queues, hw->queues)
681 __ieee80211_wake_queue(hw, i, reason, refcounted, &flags);
683 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
686 void ieee80211_wake_queues(struct ieee80211_hw *hw)
688 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
689 IEEE80211_QUEUE_STOP_REASON_DRIVER,
692 EXPORT_SYMBOL(ieee80211_wake_queues);
695 ieee80211_get_vif_queues(struct ieee80211_local *local,
696 struct ieee80211_sub_if_data *sdata)
700 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
705 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
706 queues |= BIT(sdata->vif.hw_queue[ac]);
707 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
708 queues |= BIT(sdata->vif.cab_queue);
711 queues = BIT(local->hw.queues) - 1;
717 void __ieee80211_flush_queues(struct ieee80211_local *local,
718 struct ieee80211_sub_if_data *sdata,
719 unsigned int queues, bool drop)
721 if (!local->ops->flush)
725 * If no queue was set, or if the HW doesn't support
726 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
728 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
729 queues = ieee80211_get_vif_queues(local, sdata);
731 ieee80211_stop_queues_by_reason(&local->hw, queues,
732 IEEE80211_QUEUE_STOP_REASON_FLUSH,
735 drv_flush(local, sdata, queues, drop);
737 ieee80211_wake_queues_by_reason(&local->hw, queues,
738 IEEE80211_QUEUE_STOP_REASON_FLUSH,
742 void ieee80211_flush_queues(struct ieee80211_local *local,
743 struct ieee80211_sub_if_data *sdata, bool drop)
745 __ieee80211_flush_queues(local, sdata, 0, drop);
748 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
749 struct ieee80211_sub_if_data *sdata,
750 enum queue_stop_reason reason)
752 ieee80211_stop_queues_by_reason(&local->hw,
753 ieee80211_get_vif_queues(local, sdata),
757 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
758 struct ieee80211_sub_if_data *sdata,
759 enum queue_stop_reason reason)
761 ieee80211_wake_queues_by_reason(&local->hw,
762 ieee80211_get_vif_queues(local, sdata),
766 static void __iterate_interfaces(struct ieee80211_local *local,
768 void (*iterator)(void *data, u8 *mac,
769 struct ieee80211_vif *vif),
772 struct ieee80211_sub_if_data *sdata;
773 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
775 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
776 switch (sdata->vif.type) {
777 case NL80211_IFTYPE_MONITOR:
778 if (!(sdata->u.mntr.flags & MONITOR_FLAG_ACTIVE))
781 case NL80211_IFTYPE_AP_VLAN:
786 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
787 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
789 if ((iter_flags & IEEE80211_IFACE_SKIP_SDATA_NOT_IN_DRIVER) &&
790 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
792 if (ieee80211_sdata_running(sdata) || !active_only)
793 iterator(data, sdata->vif.addr,
797 sdata = rcu_dereference_check(local->monitor_sdata,
798 lockdep_is_held(&local->iflist_mtx) ||
799 lockdep_rtnl_is_held());
801 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
802 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
803 iterator(data, sdata->vif.addr, &sdata->vif);
806 void ieee80211_iterate_interfaces(
807 struct ieee80211_hw *hw, u32 iter_flags,
808 void (*iterator)(void *data, u8 *mac,
809 struct ieee80211_vif *vif),
812 struct ieee80211_local *local = hw_to_local(hw);
814 mutex_lock(&local->iflist_mtx);
815 __iterate_interfaces(local, iter_flags, iterator, data);
816 mutex_unlock(&local->iflist_mtx);
818 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
820 void ieee80211_iterate_active_interfaces_atomic(
821 struct ieee80211_hw *hw, u32 iter_flags,
822 void (*iterator)(void *data, u8 *mac,
823 struct ieee80211_vif *vif),
826 struct ieee80211_local *local = hw_to_local(hw);
829 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
833 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
835 void ieee80211_iterate_active_interfaces_mtx(
836 struct ieee80211_hw *hw, u32 iter_flags,
837 void (*iterator)(void *data, u8 *mac,
838 struct ieee80211_vif *vif),
841 struct ieee80211_local *local = hw_to_local(hw);
843 lockdep_assert_wiphy(hw->wiphy);
845 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
848 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_mtx);
850 static void __iterate_stations(struct ieee80211_local *local,
851 void (*iterator)(void *data,
852 struct ieee80211_sta *sta),
855 struct sta_info *sta;
857 list_for_each_entry_rcu(sta, &local->sta_list, list) {
861 iterator(data, &sta->sta);
865 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
866 void (*iterator)(void *data,
867 struct ieee80211_sta *sta),
870 struct ieee80211_local *local = hw_to_local(hw);
873 __iterate_stations(local, iterator, data);
876 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
878 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
880 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
882 if (!ieee80211_sdata_running(sdata) ||
883 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
887 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
889 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
894 return &vif_to_sdata(vif)->wdev;
896 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
899 * Nothing should have been stuffed into the workqueue during
900 * the suspend->resume cycle. Since we can't check each caller
901 * of this function if we are already quiescing / suspended,
902 * check here and don't WARN since this can actually happen when
903 * the rx path (for example) is racing against __ieee80211_suspend
904 * and suspending / quiescing was set after the rx path checked
907 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
909 if (local->quiescing || (local->suspended && !local->resuming)) {
910 pr_warn("queueing ieee80211 work while going to suspend\n");
917 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
919 struct ieee80211_local *local = hw_to_local(hw);
921 if (!ieee80211_can_queue_work(local))
924 queue_work(local->workqueue, work);
926 EXPORT_SYMBOL(ieee80211_queue_work);
928 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
929 struct delayed_work *dwork,
932 struct ieee80211_local *local = hw_to_local(hw);
934 if (!ieee80211_can_queue_work(local))
937 queue_delayed_work(local->workqueue, dwork, delay);
939 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
941 static void ieee80211_parse_extension_element(u32 *crc,
942 const struct element *elem,
943 struct ieee802_11_elems *elems)
945 const void *data = elem->data + 1;
946 u8 len = elem->datalen - 1;
948 switch (elem->data[0]) {
949 case WLAN_EID_EXT_HE_MU_EDCA:
950 if (len == sizeof(*elems->mu_edca_param_set)) {
951 elems->mu_edca_param_set = data;
953 *crc = crc32_be(*crc, (void *)elem,
957 case WLAN_EID_EXT_HE_CAPABILITY:
958 elems->he_cap = data;
959 elems->he_cap_len = len;
961 case WLAN_EID_EXT_HE_OPERATION:
962 if (len >= sizeof(*elems->he_operation) &&
963 len >= ieee80211_he_oper_size(data) - 1) {
965 *crc = crc32_be(*crc, (void *)elem,
967 elems->he_operation = data;
970 case WLAN_EID_EXT_UORA:
972 elems->uora_element = data;
974 case WLAN_EID_EXT_MAX_CHANNEL_SWITCH_TIME:
976 elems->max_channel_switch_time = data;
978 case WLAN_EID_EXT_MULTIPLE_BSSID_CONFIGURATION:
979 if (len == sizeof(*elems->mbssid_config_ie))
980 elems->mbssid_config_ie = data;
982 case WLAN_EID_EXT_HE_SPR:
983 if (len >= sizeof(*elems->he_spr) &&
984 len >= ieee80211_he_spr_size(data))
985 elems->he_spr = data;
987 case WLAN_EID_EXT_HE_6GHZ_CAPA:
988 if (len == sizeof(*elems->he_6ghz_capa))
989 elems->he_6ghz_capa = data;
995 _ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
996 struct ieee802_11_elems *elems,
998 const struct element *check_inherit)
1000 const struct element *elem;
1001 bool calc_crc = filter != 0;
1002 DECLARE_BITMAP(seen_elems, 256);
1005 bitmap_zero(seen_elems, 256);
1007 for_each_element(elem, start, len) {
1008 bool elem_parse_failed;
1010 u8 elen = elem->datalen;
1011 const u8 *pos = elem->data;
1013 if (check_inherit &&
1014 !cfg80211_is_element_inherited(elem,
1020 case WLAN_EID_SUPP_RATES:
1021 case WLAN_EID_FH_PARAMS:
1022 case WLAN_EID_DS_PARAMS:
1023 case WLAN_EID_CF_PARAMS:
1025 case WLAN_EID_IBSS_PARAMS:
1026 case WLAN_EID_CHALLENGE:
1028 case WLAN_EID_ERP_INFO:
1029 case WLAN_EID_EXT_SUPP_RATES:
1030 case WLAN_EID_HT_CAPABILITY:
1031 case WLAN_EID_HT_OPERATION:
1032 case WLAN_EID_VHT_CAPABILITY:
1033 case WLAN_EID_VHT_OPERATION:
1034 case WLAN_EID_MESH_ID:
1035 case WLAN_EID_MESH_CONFIG:
1036 case WLAN_EID_PEER_MGMT:
1041 case WLAN_EID_CHANNEL_SWITCH:
1042 case WLAN_EID_EXT_CHANSWITCH_ANN:
1043 case WLAN_EID_COUNTRY:
1044 case WLAN_EID_PWR_CONSTRAINT:
1045 case WLAN_EID_TIMEOUT_INTERVAL:
1046 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1047 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1048 case WLAN_EID_CHAN_SWITCH_PARAM:
1049 case WLAN_EID_EXT_CAPABILITY:
1050 case WLAN_EID_CHAN_SWITCH_TIMING:
1051 case WLAN_EID_LINK_ID:
1052 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1054 case WLAN_EID_S1G_BCN_COMPAT:
1055 case WLAN_EID_S1G_CAPABILITIES:
1056 case WLAN_EID_S1G_OPERATION:
1057 case WLAN_EID_AID_RESPONSE:
1058 case WLAN_EID_S1G_SHORT_BCN_INTERVAL:
1060 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
1061 * that if the content gets bigger it might be needed more than once
1063 if (test_bit(id, seen_elems)) {
1064 elems->parse_error = true;
1070 if (calc_crc && id < 64 && (filter & (1ULL << id)))
1071 crc = crc32_be(crc, pos - 2, elen + 2);
1073 elem_parse_failed = false;
1076 case WLAN_EID_LINK_ID:
1077 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
1078 elem_parse_failed = true;
1081 elems->lnk_id = (void *)(pos - 2);
1083 case WLAN_EID_CHAN_SWITCH_TIMING:
1084 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
1085 elem_parse_failed = true;
1088 elems->ch_sw_timing = (void *)pos;
1090 case WLAN_EID_EXT_CAPABILITY:
1091 elems->ext_capab = pos;
1092 elems->ext_capab_len = elen;
1096 elems->ssid_len = elen;
1098 case WLAN_EID_SUPP_RATES:
1099 elems->supp_rates = pos;
1100 elems->supp_rates_len = elen;
1102 case WLAN_EID_DS_PARAMS:
1104 elems->ds_params = pos;
1106 elem_parse_failed = true;
1109 if (elen >= sizeof(struct ieee80211_tim_ie)) {
1110 elems->tim = (void *)pos;
1111 elems->tim_len = elen;
1113 elem_parse_failed = true;
1115 case WLAN_EID_CHALLENGE:
1116 elems->challenge = pos;
1117 elems->challenge_len = elen;
1119 case WLAN_EID_VENDOR_SPECIFIC:
1120 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
1122 /* Microsoft OUI (00:50:F2) */
1125 crc = crc32_be(crc, pos - 2, elen + 2);
1127 if (elen >= 5 && pos[3] == 2) {
1128 /* OUI Type 2 - WMM IE */
1130 elems->wmm_info = pos;
1131 elems->wmm_info_len = elen;
1132 } else if (pos[4] == 1) {
1133 elems->wmm_param = pos;
1134 elems->wmm_param_len = elen;
1141 elems->rsn_len = elen;
1143 case WLAN_EID_ERP_INFO:
1145 elems->erp_info = pos;
1147 elem_parse_failed = true;
1149 case WLAN_EID_EXT_SUPP_RATES:
1150 elems->ext_supp_rates = pos;
1151 elems->ext_supp_rates_len = elen;
1153 case WLAN_EID_HT_CAPABILITY:
1154 if (elen >= sizeof(struct ieee80211_ht_cap))
1155 elems->ht_cap_elem = (void *)pos;
1157 elem_parse_failed = true;
1159 case WLAN_EID_HT_OPERATION:
1160 if (elen >= sizeof(struct ieee80211_ht_operation))
1161 elems->ht_operation = (void *)pos;
1163 elem_parse_failed = true;
1165 case WLAN_EID_VHT_CAPABILITY:
1166 if (elen >= sizeof(struct ieee80211_vht_cap))
1167 elems->vht_cap_elem = (void *)pos;
1169 elem_parse_failed = true;
1171 case WLAN_EID_VHT_OPERATION:
1172 if (elen >= sizeof(struct ieee80211_vht_operation)) {
1173 elems->vht_operation = (void *)pos;
1175 crc = crc32_be(crc, pos - 2, elen + 2);
1178 elem_parse_failed = true;
1180 case WLAN_EID_OPMODE_NOTIF:
1182 elems->opmode_notif = pos;
1184 crc = crc32_be(crc, pos - 2, elen + 2);
1187 elem_parse_failed = true;
1189 case WLAN_EID_MESH_ID:
1190 elems->mesh_id = pos;
1191 elems->mesh_id_len = elen;
1193 case WLAN_EID_MESH_CONFIG:
1194 if (elen >= sizeof(struct ieee80211_meshconf_ie))
1195 elems->mesh_config = (void *)pos;
1197 elem_parse_failed = true;
1199 case WLAN_EID_PEER_MGMT:
1200 elems->peering = pos;
1201 elems->peering_len = elen;
1203 case WLAN_EID_MESH_AWAKE_WINDOW:
1205 elems->awake_window = (void *)pos;
1209 elems->preq_len = elen;
1213 elems->prep_len = elen;
1217 elems->perr_len = elen;
1220 if (elen >= sizeof(struct ieee80211_rann_ie))
1221 elems->rann = (void *)pos;
1223 elem_parse_failed = true;
1225 case WLAN_EID_CHANNEL_SWITCH:
1226 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
1227 elem_parse_failed = true;
1230 elems->ch_switch_ie = (void *)pos;
1232 case WLAN_EID_EXT_CHANSWITCH_ANN:
1233 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
1234 elem_parse_failed = true;
1237 elems->ext_chansw_ie = (void *)pos;
1239 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1240 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1241 elem_parse_failed = true;
1244 elems->sec_chan_offs = (void *)pos;
1246 case WLAN_EID_CHAN_SWITCH_PARAM:
1248 sizeof(*elems->mesh_chansw_params_ie)) {
1249 elem_parse_failed = true;
1252 elems->mesh_chansw_params_ie = (void *)pos;
1254 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1256 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1257 elem_parse_failed = true;
1260 elems->wide_bw_chansw_ie = (void *)pos;
1262 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1264 elem_parse_failed = true;
1268 * This is a bit tricky, but as we only care about
1269 * the wide bandwidth channel switch element, so
1270 * just parse it out manually.
1272 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1275 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1276 elems->wide_bw_chansw_ie =
1279 elem_parse_failed = true;
1282 case WLAN_EID_COUNTRY:
1283 elems->country_elem = pos;
1284 elems->country_elem_len = elen;
1286 case WLAN_EID_PWR_CONSTRAINT:
1288 elem_parse_failed = true;
1291 elems->pwr_constr_elem = pos;
1293 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1294 /* Lots of different options exist, but we only care
1295 * about the Dynamic Transmit Power Control element.
1296 * First check for the Cisco OUI, then for the DTPC
1300 elem_parse_failed = true;
1304 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1305 pos[2] != 0x96 || pos[3] != 0x00)
1309 elem_parse_failed = true;
1314 crc = crc32_be(crc, pos - 2, elen + 2);
1316 elems->cisco_dtpc_elem = pos;
1318 case WLAN_EID_ADDBA_EXT:
1319 if (elen != sizeof(struct ieee80211_addba_ext_ie)) {
1320 elem_parse_failed = true;
1323 elems->addba_ext_ie = (void *)pos;
1325 case WLAN_EID_TIMEOUT_INTERVAL:
1326 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1327 elems->timeout_int = (void *)pos;
1329 elem_parse_failed = true;
1331 case WLAN_EID_BSS_MAX_IDLE_PERIOD:
1332 if (elen >= sizeof(*elems->max_idle_period_ie))
1333 elems->max_idle_period_ie = (void *)pos;
1337 elems->rsnx_len = elen;
1339 case WLAN_EID_EXTENSION:
1340 ieee80211_parse_extension_element(calc_crc ?
1344 case WLAN_EID_S1G_CAPABILITIES:
1345 if (elen == sizeof(*elems->s1g_capab))
1346 elems->s1g_capab = (void *)pos;
1348 elem_parse_failed = true;
1350 case WLAN_EID_S1G_OPERATION:
1351 if (elen == sizeof(*elems->s1g_oper))
1352 elems->s1g_oper = (void *)pos;
1354 elem_parse_failed = true;
1356 case WLAN_EID_S1G_BCN_COMPAT:
1357 if (elen == sizeof(*elems->s1g_bcn_compat))
1358 elems->s1g_bcn_compat = (void *)pos;
1360 elem_parse_failed = true;
1362 case WLAN_EID_AID_RESPONSE:
1363 if (elen == sizeof(struct ieee80211_aid_response_ie))
1364 elems->aid_resp = (void *)pos;
1366 elem_parse_failed = true;
1372 if (elem_parse_failed)
1373 elems->parse_error = true;
1375 __set_bit(id, seen_elems);
1378 if (!for_each_element_completed(elem, start, len))
1379 elems->parse_error = true;
1384 static size_t ieee802_11_find_bssid_profile(const u8 *start, size_t len,
1385 struct ieee802_11_elems *elems,
1386 u8 *transmitter_bssid,
1388 u8 *nontransmitted_profile)
1390 const struct element *elem, *sub;
1391 size_t profile_len = 0;
1394 if (!bss_bssid || !transmitter_bssid)
1397 for_each_element_id(elem, WLAN_EID_MULTIPLE_BSSID, start, len) {
1398 if (elem->datalen < 2)
1401 for_each_element(sub, elem->data + 1, elem->datalen - 1) {
1402 u8 new_bssid[ETH_ALEN];
1405 if (sub->id != 0 || sub->datalen < 4) {
1406 /* not a valid BSS profile */
1410 if (sub->data[0] != WLAN_EID_NON_TX_BSSID_CAP ||
1411 sub->data[1] != 2) {
1412 /* The first element of the
1413 * Nontransmitted BSSID Profile is not
1414 * the Nontransmitted BSSID Capability
1420 memset(nontransmitted_profile, 0, len);
1421 profile_len = cfg80211_merge_profile(start, len,
1424 nontransmitted_profile,
1427 /* found a Nontransmitted BSSID Profile */
1428 index = cfg80211_find_ie(WLAN_EID_MULTI_BSSID_IDX,
1429 nontransmitted_profile,
1431 if (!index || index[1] < 1 || index[2] == 0) {
1432 /* Invalid MBSSID Index element */
1436 cfg80211_gen_new_bssid(transmitter_bssid,
1440 if (ether_addr_equal(new_bssid, bss_bssid)) {
1442 elems->bssid_index_len = index[1];
1443 elems->bssid_index = (void *)&index[2];
1449 return found ? profile_len : 0;
1452 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
1453 struct ieee802_11_elems *elems,
1454 u64 filter, u32 crc, u8 *transmitter_bssid,
1457 const struct element *non_inherit = NULL;
1458 u8 *nontransmitted_profile;
1459 int nontransmitted_profile_len = 0;
1461 memset(elems, 0, sizeof(*elems));
1462 elems->ie_start = start;
1463 elems->total_len = len;
1465 nontransmitted_profile = kmalloc(len, GFP_ATOMIC);
1466 if (nontransmitted_profile) {
1467 nontransmitted_profile_len =
1468 ieee802_11_find_bssid_profile(start, len, elems,
1471 nontransmitted_profile);
1473 cfg80211_find_ext_elem(WLAN_EID_EXT_NON_INHERITANCE,
1474 nontransmitted_profile,
1475 nontransmitted_profile_len);
1478 crc = _ieee802_11_parse_elems_crc(start, len, action, elems, filter,
1481 /* Override with nontransmitted profile, if found */
1482 if (nontransmitted_profile_len)
1483 _ieee802_11_parse_elems_crc(nontransmitted_profile,
1484 nontransmitted_profile_len,
1485 action, elems, 0, 0, NULL);
1487 if (elems->tim && !elems->parse_error) {
1488 const struct ieee80211_tim_ie *tim_ie = elems->tim;
1490 elems->dtim_period = tim_ie->dtim_period;
1491 elems->dtim_count = tim_ie->dtim_count;
1494 /* Override DTIM period and count if needed */
1495 if (elems->bssid_index &&
1496 elems->bssid_index_len >=
1497 offsetofend(struct ieee80211_bssid_index, dtim_period))
1498 elems->dtim_period = elems->bssid_index->dtim_period;
1500 if (elems->bssid_index &&
1501 elems->bssid_index_len >=
1502 offsetofend(struct ieee80211_bssid_index, dtim_count))
1503 elems->dtim_count = elems->bssid_index->dtim_count;
1505 kfree(nontransmitted_profile);
1510 void ieee80211_regulatory_limit_wmm_params(struct ieee80211_sub_if_data *sdata,
1511 struct ieee80211_tx_queue_params
1514 struct ieee80211_chanctx_conf *chanctx_conf;
1515 const struct ieee80211_reg_rule *rrule;
1516 const struct ieee80211_wmm_ac *wmm_ac;
1517 u16 center_freq = 0;
1519 if (sdata->vif.type != NL80211_IFTYPE_AP &&
1520 sdata->vif.type != NL80211_IFTYPE_STATION)
1524 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1526 center_freq = chanctx_conf->def.chan->center_freq;
1533 rrule = freq_reg_info(sdata->wdev.wiphy, MHZ_TO_KHZ(center_freq));
1535 if (IS_ERR_OR_NULL(rrule) || !rrule->has_wmm) {
1540 if (sdata->vif.type == NL80211_IFTYPE_AP)
1541 wmm_ac = &rrule->wmm_rule.ap[ac];
1543 wmm_ac = &rrule->wmm_rule.client[ac];
1544 qparam->cw_min = max_t(u16, qparam->cw_min, wmm_ac->cw_min);
1545 qparam->cw_max = max_t(u16, qparam->cw_max, wmm_ac->cw_max);
1546 qparam->aifs = max_t(u8, qparam->aifs, wmm_ac->aifsn);
1547 qparam->txop = min_t(u16, qparam->txop, wmm_ac->cot / 32);
1551 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1552 bool bss_notify, bool enable_qos)
1554 struct ieee80211_local *local = sdata->local;
1555 struct ieee80211_tx_queue_params qparam;
1556 struct ieee80211_chanctx_conf *chanctx_conf;
1559 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1562 if (!local->ops->conf_tx)
1565 if (local->hw.queues < IEEE80211_NUM_ACS)
1568 memset(&qparam, 0, sizeof(qparam));
1571 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1572 use_11b = (chanctx_conf &&
1573 chanctx_conf->def.chan->band == NL80211_BAND_2GHZ) &&
1574 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1577 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1579 /* Set defaults according to 802.11-2007 Table 7-37 */
1586 /* Confiure old 802.11b/g medium access rules. */
1587 qparam.cw_max = aCWmax;
1588 qparam.cw_min = aCWmin;
1592 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1593 /* Update if QoS is enabled. */
1596 case IEEE80211_AC_BK:
1597 qparam.cw_max = aCWmax;
1598 qparam.cw_min = aCWmin;
1605 /* never happens but let's not leave undefined */
1607 case IEEE80211_AC_BE:
1608 qparam.cw_max = aCWmax;
1609 qparam.cw_min = aCWmin;
1616 case IEEE80211_AC_VI:
1617 qparam.cw_max = aCWmin;
1618 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1622 qparam.txop = 6016/32;
1624 qparam.txop = 3008/32;
1631 case IEEE80211_AC_VO:
1632 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1633 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1637 qparam.txop = 3264/32;
1639 qparam.txop = 1504/32;
1644 ieee80211_regulatory_limit_wmm_params(sdata, &qparam, ac);
1646 qparam.uapsd = false;
1648 sdata->tx_conf[ac] = qparam;
1649 drv_conf_tx(local, sdata, ac, &qparam);
1652 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1653 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE &&
1654 sdata->vif.type != NL80211_IFTYPE_NAN) {
1655 sdata->vif.bss_conf.qos = enable_qos;
1657 ieee80211_bss_info_change_notify(sdata,
1662 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1663 u16 transaction, u16 auth_alg, u16 status,
1664 const u8 *extra, size_t extra_len, const u8 *da,
1665 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1668 struct ieee80211_local *local = sdata->local;
1669 struct sk_buff *skb;
1670 struct ieee80211_mgmt *mgmt;
1673 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1674 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1675 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1679 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1681 mgmt = skb_put_zero(skb, 24 + 6);
1682 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1683 IEEE80211_STYPE_AUTH);
1684 memcpy(mgmt->da, da, ETH_ALEN);
1685 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1686 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1687 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1688 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1689 mgmt->u.auth.status_code = cpu_to_le16(status);
1691 skb_put_data(skb, extra, extra_len);
1693 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1694 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1695 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1699 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1701 ieee80211_tx_skb(sdata, skb);
1704 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1705 const u8 *da, const u8 *bssid,
1706 u16 stype, u16 reason,
1707 bool send_frame, u8 *frame_buf)
1709 struct ieee80211_local *local = sdata->local;
1710 struct sk_buff *skb;
1711 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1714 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1715 mgmt->duration = 0; /* initialize only */
1716 mgmt->seq_ctrl = 0; /* initialize only */
1717 memcpy(mgmt->da, da, ETH_ALEN);
1718 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1719 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1720 /* u.deauth.reason_code == u.disassoc.reason_code */
1721 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1724 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1725 IEEE80211_DEAUTH_FRAME_LEN);
1729 skb_reserve(skb, local->hw.extra_tx_headroom);
1732 skb_put_data(skb, mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1734 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1735 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1736 IEEE80211_SKB_CB(skb)->flags |=
1737 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1739 ieee80211_tx_skb(sdata, skb);
1743 static u8 *ieee80211_write_he_6ghz_cap(u8 *pos, __le16 cap, u8 *end)
1745 if ((end - pos) < 5)
1748 *pos++ = WLAN_EID_EXTENSION;
1749 *pos++ = 1 + sizeof(cap);
1750 *pos++ = WLAN_EID_EXT_HE_6GHZ_CAPA;
1751 memcpy(pos, &cap, sizeof(cap));
1756 static int ieee80211_build_preq_ies_band(struct ieee80211_sub_if_data *sdata,
1757 u8 *buffer, size_t buffer_len,
1758 const u8 *ie, size_t ie_len,
1759 enum nl80211_band band,
1761 struct cfg80211_chan_def *chandef,
1762 size_t *offset, u32 flags)
1764 struct ieee80211_local *local = sdata->local;
1765 struct ieee80211_supported_band *sband;
1766 const struct ieee80211_sta_he_cap *he_cap;
1767 u8 *pos = buffer, *end = buffer + buffer_len;
1769 int supp_rates_len, i;
1775 bool have_80mhz = false;
1779 sband = local->hw.wiphy->bands[band];
1780 if (WARN_ON_ONCE(!sband))
1783 rate_flags = ieee80211_chandef_rate_flags(chandef);
1784 shift = ieee80211_chandef_get_shift(chandef);
1787 for (i = 0; i < sband->n_bitrates; i++) {
1788 if ((BIT(i) & rate_mask) == 0)
1789 continue; /* skip rate */
1790 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1793 rates[num_rates++] =
1794 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1798 supp_rates_len = min_t(int, num_rates, 8);
1800 if (end - pos < 2 + supp_rates_len)
1802 *pos++ = WLAN_EID_SUPP_RATES;
1803 *pos++ = supp_rates_len;
1804 memcpy(pos, rates, supp_rates_len);
1805 pos += supp_rates_len;
1807 /* insert "request information" if in custom IEs */
1809 static const u8 before_extrates[] = {
1811 WLAN_EID_SUPP_RATES,
1814 noffset = ieee80211_ie_split(ie, ie_len,
1816 ARRAY_SIZE(before_extrates),
1818 if (end - pos < noffset - *offset)
1820 memcpy(pos, ie + *offset, noffset - *offset);
1821 pos += noffset - *offset;
1825 ext_rates_len = num_rates - supp_rates_len;
1826 if (ext_rates_len > 0) {
1827 if (end - pos < 2 + ext_rates_len)
1829 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1830 *pos++ = ext_rates_len;
1831 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1832 pos += ext_rates_len;
1835 if (chandef->chan && sband->band == NL80211_BAND_2GHZ) {
1838 *pos++ = WLAN_EID_DS_PARAMS;
1840 *pos++ = ieee80211_frequency_to_channel(
1841 chandef->chan->center_freq);
1844 if (flags & IEEE80211_PROBE_FLAG_MIN_CONTENT)
1847 /* insert custom IEs that go before HT */
1849 static const u8 before_ht[] = {
1851 * no need to list the ones split off already
1852 * (or generated here)
1855 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1857 noffset = ieee80211_ie_split(ie, ie_len,
1858 before_ht, ARRAY_SIZE(before_ht),
1860 if (end - pos < noffset - *offset)
1862 memcpy(pos, ie + *offset, noffset - *offset);
1863 pos += noffset - *offset;
1867 if (sband->ht_cap.ht_supported) {
1868 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1870 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1874 /* insert custom IEs that go before VHT */
1876 static const u8 before_vht[] = {
1878 * no need to list the ones split off already
1879 * (or generated here)
1881 WLAN_EID_BSS_COEX_2040,
1882 WLAN_EID_EXT_CAPABILITY,
1884 WLAN_EID_CHANNEL_USAGE,
1885 WLAN_EID_INTERWORKING,
1887 /* 60 GHz (Multi-band, DMG, MMS) can't happen */
1889 noffset = ieee80211_ie_split(ie, ie_len,
1890 before_vht, ARRAY_SIZE(before_vht),
1892 if (end - pos < noffset - *offset)
1894 memcpy(pos, ie + *offset, noffset - *offset);
1895 pos += noffset - *offset;
1899 /* Check if any channel in this sband supports at least 80 MHz */
1900 for (i = 0; i < sband->n_channels; i++) {
1901 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1902 IEEE80211_CHAN_NO_80MHZ))
1909 if (sband->vht_cap.vht_supported && have_80mhz) {
1910 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1912 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1913 sband->vht_cap.cap);
1916 /* insert custom IEs that go before HE */
1918 static const u8 before_he[] = {
1920 * no need to list the ones split off before VHT
1923 WLAN_EID_EXTENSION, WLAN_EID_EXT_FILS_REQ_PARAMS,
1925 /* TODO: add 11ah/11aj/11ak elements */
1927 noffset = ieee80211_ie_split(ie, ie_len,
1928 before_he, ARRAY_SIZE(before_he),
1930 if (end - pos < noffset - *offset)
1932 memcpy(pos, ie + *offset, noffset - *offset);
1933 pos += noffset - *offset;
1937 he_cap = ieee80211_get_he_sta_cap(sband);
1939 pos = ieee80211_ie_build_he_cap(pos, he_cap, end);
1943 if (sband->band == NL80211_BAND_6GHZ) {
1944 enum nl80211_iftype iftype =
1945 ieee80211_vif_type_p2p(&sdata->vif);
1946 __le16 cap = ieee80211_get_he_6ghz_capa(sband, iftype);
1948 pos = ieee80211_write_he_6ghz_cap(pos, cap, end);
1953 * If adding more here, adjust code in main.c
1954 * that calculates local->scan_ies_len.
1957 return pos - buffer;
1959 WARN_ONCE(1, "not enough space for preq IEs\n");
1961 return pos - buffer;
1964 int ieee80211_build_preq_ies(struct ieee80211_sub_if_data *sdata, u8 *buffer,
1966 struct ieee80211_scan_ies *ie_desc,
1967 const u8 *ie, size_t ie_len,
1968 u8 bands_used, u32 *rate_masks,
1969 struct cfg80211_chan_def *chandef,
1972 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1975 memset(ie_desc, 0, sizeof(*ie_desc));
1977 for (i = 0; i < NUM_NL80211_BANDS; i++) {
1978 if (bands_used & BIT(i)) {
1979 pos += ieee80211_build_preq_ies_band(sdata,
1987 ie_desc->ies[i] = buffer + old_pos;
1988 ie_desc->len[i] = pos - old_pos;
1993 /* add any remaining custom IEs */
1995 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1996 "not enough space for preq custom IEs\n"))
1998 memcpy(buffer + pos, ie + custom_ie_offset,
1999 ie_len - custom_ie_offset);
2000 ie_desc->common_ies = buffer + pos;
2001 ie_desc->common_ie_len = ie_len - custom_ie_offset;
2002 pos += ie_len - custom_ie_offset;
2008 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
2009 const u8 *src, const u8 *dst,
2011 struct ieee80211_channel *chan,
2012 const u8 *ssid, size_t ssid_len,
2013 const u8 *ie, size_t ie_len,
2016 struct ieee80211_local *local = sdata->local;
2017 struct cfg80211_chan_def chandef;
2018 struct sk_buff *skb;
2019 struct ieee80211_mgmt *mgmt;
2021 u32 rate_masks[NUM_NL80211_BANDS] = {};
2022 struct ieee80211_scan_ies dummy_ie_desc;
2025 * Do not send DS Channel parameter for directed probe requests
2026 * in order to maximize the chance that we get a response. Some
2027 * badly-behaved APs don't respond when this parameter is included.
2029 chandef.width = sdata->vif.bss_conf.chandef.width;
2030 if (flags & IEEE80211_PROBE_FLAG_DIRECTED)
2031 chandef.chan = NULL;
2033 chandef.chan = chan;
2035 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
2040 rate_masks[chan->band] = ratemask;
2041 ies_len = ieee80211_build_preq_ies(sdata, skb_tail_pointer(skb),
2042 skb_tailroom(skb), &dummy_ie_desc,
2043 ie, ie_len, BIT(chan->band),
2044 rate_masks, &chandef, flags);
2045 skb_put(skb, ies_len);
2048 mgmt = (struct ieee80211_mgmt *) skb->data;
2049 memcpy(mgmt->da, dst, ETH_ALEN);
2050 memcpy(mgmt->bssid, dst, ETH_ALEN);
2053 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
2058 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
2059 struct ieee802_11_elems *elems,
2060 enum nl80211_band band, u32 *basic_rates)
2062 struct ieee80211_supported_band *sband;
2064 u32 supp_rates, rate_flags;
2067 sband = sdata->local->hw.wiphy->bands[band];
2068 if (WARN_ON(!sband))
2071 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2072 shift = ieee80211_vif_get_shift(&sdata->vif);
2074 num_rates = sband->n_bitrates;
2076 for (i = 0; i < elems->supp_rates_len +
2077 elems->ext_supp_rates_len; i++) {
2081 if (i < elems->supp_rates_len)
2082 rate = elems->supp_rates[i];
2083 else if (elems->ext_supp_rates)
2084 rate = elems->ext_supp_rates
2085 [i - elems->supp_rates_len];
2086 own_rate = 5 * (rate & 0x7f);
2087 is_basic = !!(rate & 0x80);
2089 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
2092 for (j = 0; j < num_rates; j++) {
2094 if ((rate_flags & sband->bitrates[j].flags)
2098 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
2101 if (brate == own_rate) {
2102 supp_rates |= BIT(j);
2103 if (basic_rates && is_basic)
2104 *basic_rates |= BIT(j);
2111 void ieee80211_stop_device(struct ieee80211_local *local)
2113 ieee80211_led_radio(local, false);
2114 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
2116 cancel_work_sync(&local->reconfig_filter);
2118 flush_workqueue(local->workqueue);
2122 static void ieee80211_flush_completed_scan(struct ieee80211_local *local,
2125 /* It's possible that we don't handle the scan completion in
2126 * time during suspend, so if it's still marked as completed
2127 * here, queue the work and flush it to clean things up.
2128 * Instead of calling the worker function directly here, we
2129 * really queue it to avoid potential races with other flows
2130 * scheduling the same work.
2132 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2133 /* If coming from reconfiguration failure, abort the scan so
2134 * we don't attempt to continue a partial HW scan - which is
2135 * possible otherwise if (e.g.) the 2.4 GHz portion was the
2136 * completed scan, and a 5 GHz portion is still pending.
2139 set_bit(SCAN_ABORTED, &local->scanning);
2140 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2141 flush_delayed_work(&local->scan_work);
2145 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
2147 struct ieee80211_sub_if_data *sdata;
2148 struct ieee80211_chanctx *ctx;
2151 * We get here if during resume the device can't be restarted properly.
2152 * We might also get here if this happens during HW reset, which is a
2153 * slightly different situation and we need to drop all connections in
2156 * Ask cfg80211 to turn off all interfaces, this will result in more
2157 * warnings but at least we'll then get into a clean stopped state.
2160 local->resuming = false;
2161 local->suspended = false;
2162 local->in_reconfig = false;
2164 ieee80211_flush_completed_scan(local, true);
2166 /* scheduled scan clearly can't be running any more, but tell
2167 * cfg80211 and clear local state
2169 ieee80211_sched_scan_end(local);
2171 list_for_each_entry(sdata, &local->interfaces, list)
2172 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
2174 /* Mark channel contexts as not being in the driver any more to avoid
2175 * removing them from the driver during the shutdown process...
2177 mutex_lock(&local->chanctx_mtx);
2178 list_for_each_entry(ctx, &local->chanctx_list, list)
2179 ctx->driver_present = false;
2180 mutex_unlock(&local->chanctx_mtx);
2182 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
2185 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
2186 struct ieee80211_sub_if_data *sdata)
2188 struct ieee80211_chanctx_conf *conf;
2189 struct ieee80211_chanctx *ctx;
2191 if (!local->use_chanctx)
2194 mutex_lock(&local->chanctx_mtx);
2195 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2196 lockdep_is_held(&local->chanctx_mtx));
2198 ctx = container_of(conf, struct ieee80211_chanctx, conf);
2199 drv_assign_vif_chanctx(local, sdata, ctx);
2201 mutex_unlock(&local->chanctx_mtx);
2204 static void ieee80211_reconfig_stations(struct ieee80211_sub_if_data *sdata)
2206 struct ieee80211_local *local = sdata->local;
2207 struct sta_info *sta;
2210 mutex_lock(&local->sta_mtx);
2211 list_for_each_entry(sta, &local->sta_list, list) {
2212 enum ieee80211_sta_state state;
2214 if (!sta->uploaded || sta->sdata != sdata)
2217 for (state = IEEE80211_STA_NOTEXIST;
2218 state < sta->sta_state; state++)
2219 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2222 mutex_unlock(&local->sta_mtx);
2225 static int ieee80211_reconfig_nan(struct ieee80211_sub_if_data *sdata)
2227 struct cfg80211_nan_func *func, **funcs;
2230 res = drv_start_nan(sdata->local, sdata,
2231 &sdata->u.nan.conf);
2235 funcs = kcalloc(sdata->local->hw.max_nan_de_entries + 1,
2241 /* Add all the functions:
2242 * This is a little bit ugly. We need to call a potentially sleeping
2243 * callback for each NAN function, so we can't hold the spinlock.
2245 spin_lock_bh(&sdata->u.nan.func_lock);
2247 idr_for_each_entry(&sdata->u.nan.function_inst_ids, func, id)
2250 spin_unlock_bh(&sdata->u.nan.func_lock);
2252 for (i = 0; funcs[i]; i++) {
2253 res = drv_add_nan_func(sdata->local, sdata, funcs[i]);
2255 ieee80211_nan_func_terminated(&sdata->vif,
2256 funcs[i]->instance_id,
2257 NL80211_NAN_FUNC_TERM_REASON_ERROR,
2266 int ieee80211_reconfig(struct ieee80211_local *local)
2268 struct ieee80211_hw *hw = &local->hw;
2269 struct ieee80211_sub_if_data *sdata;
2270 struct ieee80211_chanctx *ctx;
2271 struct sta_info *sta;
2273 bool reconfig_due_to_wowlan = false;
2274 struct ieee80211_sub_if_data *sched_scan_sdata;
2275 struct cfg80211_sched_scan_request *sched_scan_req;
2276 bool sched_scan_stopped = false;
2277 bool suspended = local->suspended;
2279 /* nothing to do if HW shouldn't run */
2280 if (!local->open_count)
2285 local->resuming = true;
2287 if (local->wowlan) {
2289 * In the wowlan case, both mac80211 and the device
2290 * are functional when the resume op is called, so
2291 * clear local->suspended so the device could operate
2292 * normally (e.g. pass rx frames).
2294 local->suspended = false;
2295 res = drv_resume(local);
2296 local->wowlan = false;
2298 local->resuming = false;
2305 * res is 1, which means the driver requested
2306 * to go through a regular reset on wakeup.
2307 * restore local->suspended in this case.
2309 reconfig_due_to_wowlan = true;
2310 local->suspended = true;
2315 * In case of hw_restart during suspend (without wowlan),
2316 * cancel restart work, as we are reconfiguring the device
2318 * Note that restart_work is scheduled on a frozen workqueue,
2319 * so we can't deadlock in this case.
2321 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
2322 cancel_work_sync(&local->restart_work);
2324 local->started = false;
2327 * Upon resume hardware can sometimes be goofy due to
2328 * various platform / driver / bus issues, so restarting
2329 * the device may at times not work immediately. Propagate
2332 res = drv_start(local);
2335 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
2337 WARN(1, "Hardware became unavailable during restart.\n");
2338 ieee80211_handle_reconfig_failure(local);
2342 /* setup fragmentation threshold */
2343 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
2345 /* setup RTS threshold */
2346 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
2348 /* reset coverage class */
2349 drv_set_coverage_class(local, hw->wiphy->coverage_class);
2351 ieee80211_led_radio(local, true);
2352 ieee80211_mod_tpt_led_trig(local,
2353 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
2355 /* add interfaces */
2356 sdata = rtnl_dereference(local->monitor_sdata);
2358 /* in HW restart it exists already */
2359 WARN_ON(local->resuming);
2360 res = drv_add_interface(local, sdata);
2362 RCU_INIT_POINTER(local->monitor_sdata, NULL);
2368 list_for_each_entry(sdata, &local->interfaces, list) {
2369 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2370 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2371 ieee80211_sdata_running(sdata)) {
2372 res = drv_add_interface(local, sdata);
2378 /* If adding any of the interfaces failed above, roll back and
2382 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
2384 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
2385 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
2386 ieee80211_sdata_running(sdata))
2387 drv_remove_interface(local, sdata);
2388 ieee80211_handle_reconfig_failure(local);
2392 /* add channel contexts */
2393 if (local->use_chanctx) {
2394 mutex_lock(&local->chanctx_mtx);
2395 list_for_each_entry(ctx, &local->chanctx_list, list)
2396 if (ctx->replace_state !=
2397 IEEE80211_CHANCTX_REPLACES_OTHER)
2398 WARN_ON(drv_add_chanctx(local, ctx));
2399 mutex_unlock(&local->chanctx_mtx);
2401 sdata = rtnl_dereference(local->monitor_sdata);
2402 if (sdata && ieee80211_sdata_running(sdata))
2403 ieee80211_assign_chanctx(local, sdata);
2406 /* reconfigure hardware */
2407 ieee80211_hw_config(local, ~0);
2409 ieee80211_configure_filter(local);
2411 /* Finally also reconfigure all the BSS information */
2412 list_for_each_entry(sdata, &local->interfaces, list) {
2415 if (!ieee80211_sdata_running(sdata))
2418 ieee80211_assign_chanctx(local, sdata);
2420 switch (sdata->vif.type) {
2421 case NL80211_IFTYPE_AP_VLAN:
2422 case NL80211_IFTYPE_MONITOR:
2424 case NL80211_IFTYPE_ADHOC:
2425 if (sdata->vif.bss_conf.ibss_joined)
2426 WARN_ON(drv_join_ibss(local, sdata));
2429 ieee80211_reconfig_stations(sdata);
2431 case NL80211_IFTYPE_AP: /* AP stations are handled later */
2432 for (i = 0; i < IEEE80211_NUM_ACS; i++)
2433 drv_conf_tx(local, sdata, i,
2434 &sdata->tx_conf[i]);
2438 /* common change flags for all interface types */
2439 changed = BSS_CHANGED_ERP_CTS_PROT |
2440 BSS_CHANGED_ERP_PREAMBLE |
2441 BSS_CHANGED_ERP_SLOT |
2443 BSS_CHANGED_BASIC_RATES |
2444 BSS_CHANGED_BEACON_INT |
2449 BSS_CHANGED_TXPOWER |
2450 BSS_CHANGED_MCAST_RATE;
2452 if (sdata->vif.mu_mimo_owner)
2453 changed |= BSS_CHANGED_MU_GROUPS;
2455 switch (sdata->vif.type) {
2456 case NL80211_IFTYPE_STATION:
2457 changed |= BSS_CHANGED_ASSOC |
2458 BSS_CHANGED_ARP_FILTER |
2461 /* Re-send beacon info report to the driver */
2462 if (sdata->u.mgd.have_beacon)
2463 changed |= BSS_CHANGED_BEACON_INFO;
2465 if (sdata->vif.bss_conf.max_idle_period ||
2466 sdata->vif.bss_conf.protected_keep_alive)
2467 changed |= BSS_CHANGED_KEEP_ALIVE;
2470 ieee80211_bss_info_change_notify(sdata, changed);
2471 sdata_unlock(sdata);
2473 case NL80211_IFTYPE_OCB:
2474 changed |= BSS_CHANGED_OCB;
2475 ieee80211_bss_info_change_notify(sdata, changed);
2477 case NL80211_IFTYPE_ADHOC:
2478 changed |= BSS_CHANGED_IBSS;
2480 case NL80211_IFTYPE_AP:
2481 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
2483 if (sdata->vif.bss_conf.ftm_responder == 1 &&
2484 wiphy_ext_feature_isset(sdata->local->hw.wiphy,
2485 NL80211_EXT_FEATURE_ENABLE_FTM_RESPONDER))
2486 changed |= BSS_CHANGED_FTM_RESPONDER;
2488 if (sdata->vif.type == NL80211_IFTYPE_AP) {
2489 changed |= BSS_CHANGED_AP_PROBE_RESP;
2491 if (rcu_access_pointer(sdata->u.ap.beacon))
2492 drv_start_ap(local, sdata);
2495 case NL80211_IFTYPE_MESH_POINT:
2496 if (sdata->vif.bss_conf.enable_beacon) {
2497 changed |= BSS_CHANGED_BEACON |
2498 BSS_CHANGED_BEACON_ENABLED;
2499 ieee80211_bss_info_change_notify(sdata, changed);
2502 case NL80211_IFTYPE_NAN:
2503 res = ieee80211_reconfig_nan(sdata);
2505 ieee80211_handle_reconfig_failure(local);
2509 case NL80211_IFTYPE_AP_VLAN:
2510 case NL80211_IFTYPE_MONITOR:
2511 case NL80211_IFTYPE_P2P_DEVICE:
2514 case NL80211_IFTYPE_UNSPECIFIED:
2515 case NUM_NL80211_IFTYPES:
2516 case NL80211_IFTYPE_P2P_CLIENT:
2517 case NL80211_IFTYPE_P2P_GO:
2518 case NL80211_IFTYPE_WDS:
2524 ieee80211_recalc_ps(local);
2527 * The sta might be in psm against the ap (e.g. because
2528 * this was the state before a hw restart), so we
2529 * explicitly send a null packet in order to make sure
2530 * it'll sync against the ap (and get out of psm).
2532 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
2533 list_for_each_entry(sdata, &local->interfaces, list) {
2534 if (sdata->vif.type != NL80211_IFTYPE_STATION)
2536 if (!sdata->u.mgd.associated)
2539 ieee80211_send_nullfunc(local, sdata, false);
2543 /* APs are now beaconing, add back stations */
2544 mutex_lock(&local->sta_mtx);
2545 list_for_each_entry(sta, &local->sta_list, list) {
2546 enum ieee80211_sta_state state;
2551 if (sta->sdata->vif.type != NL80211_IFTYPE_AP &&
2552 sta->sdata->vif.type != NL80211_IFTYPE_AP_VLAN)
2555 for (state = IEEE80211_STA_NOTEXIST;
2556 state < sta->sta_state; state++)
2557 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2560 mutex_unlock(&local->sta_mtx);
2563 list_for_each_entry(sdata, &local->interfaces, list)
2564 ieee80211_reenable_keys(sdata);
2566 /* Reconfigure sched scan if it was interrupted by FW restart */
2567 mutex_lock(&local->mtx);
2568 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2569 lockdep_is_held(&local->mtx));
2570 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2571 lockdep_is_held(&local->mtx));
2572 if (sched_scan_sdata && sched_scan_req)
2574 * Sched scan stopped, but we don't want to report it. Instead,
2575 * we're trying to reschedule. However, if more than one scan
2576 * plan was set, we cannot reschedule since we don't know which
2577 * scan plan was currently running (and some scan plans may have
2578 * already finished).
2580 if (sched_scan_req->n_scan_plans > 1 ||
2581 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2583 RCU_INIT_POINTER(local->sched_scan_sdata, NULL);
2584 RCU_INIT_POINTER(local->sched_scan_req, NULL);
2585 sched_scan_stopped = true;
2587 mutex_unlock(&local->mtx);
2589 if (sched_scan_stopped)
2590 cfg80211_sched_scan_stopped_locked(local->hw.wiphy, 0);
2594 if (local->monitors == local->open_count && local->monitors > 0)
2595 ieee80211_add_virtual_monitor(local);
2598 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2599 * sessions can be established after a resume.
2601 * Also tear down aggregation sessions since reconfiguring
2602 * them in a hardware restart scenario is not easily done
2603 * right now, and the hardware will have lost information
2604 * about the sessions, but we and the AP still think they
2605 * are active. This is really a workaround though.
2607 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2608 mutex_lock(&local->sta_mtx);
2610 list_for_each_entry(sta, &local->sta_list, list) {
2611 if (!local->resuming)
2612 ieee80211_sta_tear_down_BA_sessions(
2613 sta, AGG_STOP_LOCAL_REQUEST);
2614 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2617 mutex_unlock(&local->sta_mtx);
2620 if (local->in_reconfig) {
2621 local->in_reconfig = false;
2624 /* Restart deferred ROCs */
2625 mutex_lock(&local->mtx);
2626 ieee80211_start_next_roc(local);
2627 mutex_unlock(&local->mtx);
2629 /* Requeue all works */
2630 list_for_each_entry(sdata, &local->interfaces, list)
2631 ieee80211_queue_work(&local->hw, &sdata->work);
2634 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2635 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2639 * If this is for hw restart things are still running.
2640 * We may want to change that later, however.
2642 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2643 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2649 /* first set suspended false, then resuming */
2650 local->suspended = false;
2652 local->resuming = false;
2654 ieee80211_flush_completed_scan(local, false);
2656 if (local->open_count && !reconfig_due_to_wowlan)
2657 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2659 list_for_each_entry(sdata, &local->interfaces, list) {
2660 if (!ieee80211_sdata_running(sdata))
2662 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2663 ieee80211_sta_restart(sdata);
2666 mod_timer(&local->sta_cleanup, jiffies + 1);
2674 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2676 struct ieee80211_sub_if_data *sdata;
2677 struct ieee80211_local *local;
2678 struct ieee80211_key *key;
2683 sdata = vif_to_sdata(vif);
2684 local = sdata->local;
2686 if (WARN_ON(!local->resuming))
2689 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2692 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2694 mutex_lock(&local->key_mtx);
2695 list_for_each_entry(key, &sdata->key_list, list)
2696 key->flags |= KEY_FLAG_TAINTED;
2697 mutex_unlock(&local->key_mtx);
2699 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2701 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2703 struct ieee80211_local *local = sdata->local;
2704 struct ieee80211_chanctx_conf *chanctx_conf;
2705 struct ieee80211_chanctx *chanctx;
2707 mutex_lock(&local->chanctx_mtx);
2709 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2710 lockdep_is_held(&local->chanctx_mtx));
2713 * This function can be called from a work, thus it may be possible
2714 * that the chanctx_conf is removed (due to a disconnection, for
2716 * So nothing should be done in such case.
2721 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2722 ieee80211_recalc_smps_chanctx(local, chanctx);
2724 mutex_unlock(&local->chanctx_mtx);
2727 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2729 struct ieee80211_local *local = sdata->local;
2730 struct ieee80211_chanctx_conf *chanctx_conf;
2731 struct ieee80211_chanctx *chanctx;
2733 mutex_lock(&local->chanctx_mtx);
2735 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2736 lockdep_is_held(&local->chanctx_mtx));
2738 if (WARN_ON_ONCE(!chanctx_conf))
2741 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2742 ieee80211_recalc_chanctx_min_def(local, chanctx);
2744 mutex_unlock(&local->chanctx_mtx);
2747 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2749 size_t pos = offset;
2751 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2752 pos += 2 + ies[pos + 1];
2757 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2761 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2763 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2767 * Scale up threshold values before storing it, as the RSSI averaging
2768 * algorithm uses a scaled up value as well. Change this scaling
2769 * factor if the RSSI averaging algorithm changes.
2771 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2772 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2775 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2779 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2781 WARN_ON(rssi_min_thold == rssi_max_thold ||
2782 rssi_min_thold > rssi_max_thold);
2784 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2787 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2789 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2791 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2793 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2795 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2797 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2802 *pos++ = WLAN_EID_HT_CAPABILITY;
2803 *pos++ = sizeof(struct ieee80211_ht_cap);
2804 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2806 /* capability flags */
2807 tmp = cpu_to_le16(cap);
2808 memcpy(pos, &tmp, sizeof(u16));
2811 /* AMPDU parameters */
2812 *pos++ = ht_cap->ampdu_factor |
2813 (ht_cap->ampdu_density <<
2814 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2817 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2818 pos += sizeof(ht_cap->mcs);
2820 /* extended capabilities */
2821 pos += sizeof(__le16);
2823 /* BF capabilities */
2824 pos += sizeof(__le32);
2826 /* antenna selection */
2832 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2837 *pos++ = WLAN_EID_VHT_CAPABILITY;
2838 *pos++ = sizeof(struct ieee80211_vht_cap);
2839 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2841 /* capability flags */
2842 tmp = cpu_to_le32(cap);
2843 memcpy(pos, &tmp, sizeof(u32));
2847 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2848 pos += sizeof(vht_cap->vht_mcs);
2853 u8 ieee80211_ie_len_he_cap(struct ieee80211_sub_if_data *sdata, u8 iftype)
2855 const struct ieee80211_sta_he_cap *he_cap;
2856 struct ieee80211_supported_band *sband;
2859 sband = ieee80211_get_sband(sdata);
2863 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
2867 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2869 sizeof(he_cap->he_cap_elem) + n +
2870 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2871 he_cap->he_cap_elem.phy_cap_info);
2874 u8 *ieee80211_ie_build_he_cap(u8 *pos,
2875 const struct ieee80211_sta_he_cap *he_cap,
2882 /* Make sure we have place for the IE */
2884 * TODO: the 1 added is because this temporarily is under the EXTENSION
2885 * IE. Get rid of it when it moves.
2890 n = ieee80211_he_mcs_nss_size(&he_cap->he_cap_elem);
2892 sizeof(he_cap->he_cap_elem) + n +
2893 ieee80211_he_ppe_size(he_cap->ppe_thres[0],
2894 he_cap->he_cap_elem.phy_cap_info);
2896 if ((end - pos) < ie_len)
2899 *pos++ = WLAN_EID_EXTENSION;
2900 pos++; /* We'll set the size later below */
2901 *pos++ = WLAN_EID_EXT_HE_CAPABILITY;
2904 memcpy(pos, &he_cap->he_cap_elem, sizeof(he_cap->he_cap_elem));
2905 pos += sizeof(he_cap->he_cap_elem);
2907 memcpy(pos, &he_cap->he_mcs_nss_supp, n);
2910 /* Check if PPE Threshold should be present */
2911 if ((he_cap->he_cap_elem.phy_cap_info[6] &
2912 IEEE80211_HE_PHY_CAP6_PPE_THRESHOLD_PRESENT) == 0)
2916 * Calculate how many PPET16/PPET8 pairs are to come. Algorithm:
2917 * (NSS_M1 + 1) x (num of 1 bits in RU_INDEX_BITMASK)
2919 n = hweight8(he_cap->ppe_thres[0] &
2920 IEEE80211_PPE_THRES_RU_INDEX_BITMASK_MASK);
2921 n *= (1 + ((he_cap->ppe_thres[0] & IEEE80211_PPE_THRES_NSS_MASK) >>
2922 IEEE80211_PPE_THRES_NSS_POS));
2925 * Each pair is 6 bits, and we need to add the 7 "header" bits to the
2928 n = (n * IEEE80211_PPE_THRES_INFO_PPET_SIZE * 2) + 7;
2929 n = DIV_ROUND_UP(n, 8);
2931 /* Copy PPE Thresholds */
2932 memcpy(pos, &he_cap->ppe_thres, n);
2936 orig_pos[1] = (pos - orig_pos) - 2;
2940 void ieee80211_ie_build_he_6ghz_cap(struct ieee80211_sub_if_data *sdata,
2941 struct sk_buff *skb)
2943 struct ieee80211_supported_band *sband;
2944 const struct ieee80211_sband_iftype_data *iftd;
2945 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
2949 sband = ieee80211_get_sband(sdata);
2953 iftd = ieee80211_get_sband_iftype_data(sband, iftype);
2957 /* Check for device HE 6 GHz capability before adding element */
2958 if (!iftd->he_6ghz_capa.capa)
2961 cap = le16_to_cpu(iftd->he_6ghz_capa.capa);
2962 cap &= ~IEEE80211_HE_6GHZ_CAP_SM_PS;
2964 switch (sdata->smps_mode) {
2965 case IEEE80211_SMPS_AUTOMATIC:
2966 case IEEE80211_SMPS_NUM_MODES:
2969 case IEEE80211_SMPS_OFF:
2970 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DISABLED,
2971 IEEE80211_HE_6GHZ_CAP_SM_PS);
2973 case IEEE80211_SMPS_STATIC:
2974 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_STATIC,
2975 IEEE80211_HE_6GHZ_CAP_SM_PS);
2977 case IEEE80211_SMPS_DYNAMIC:
2978 cap |= u16_encode_bits(WLAN_HT_CAP_SM_PS_DYNAMIC,
2979 IEEE80211_HE_6GHZ_CAP_SM_PS);
2983 pos = skb_put(skb, 2 + 1 + sizeof(cap));
2984 ieee80211_write_he_6ghz_cap(pos, cpu_to_le16(cap),
2985 pos + 2 + 1 + sizeof(cap));
2988 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2989 const struct cfg80211_chan_def *chandef,
2990 u16 prot_mode, bool rifs_mode)
2992 struct ieee80211_ht_operation *ht_oper;
2993 /* Build HT Information */
2994 *pos++ = WLAN_EID_HT_OPERATION;
2995 *pos++ = sizeof(struct ieee80211_ht_operation);
2996 ht_oper = (struct ieee80211_ht_operation *)pos;
2997 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2998 chandef->chan->center_freq);
2999 switch (chandef->width) {
3000 case NL80211_CHAN_WIDTH_160:
3001 case NL80211_CHAN_WIDTH_80P80:
3002 case NL80211_CHAN_WIDTH_80:
3003 case NL80211_CHAN_WIDTH_40:
3004 if (chandef->center_freq1 > chandef->chan->center_freq)
3005 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
3007 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
3010 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
3013 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
3014 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
3015 chandef->width != NL80211_CHAN_WIDTH_20)
3016 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
3019 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
3021 ht_oper->operation_mode = cpu_to_le16(prot_mode);
3022 ht_oper->stbc_param = 0x0000;
3024 /* It seems that Basic MCS set and Supported MCS set
3025 are identical for the first 10 bytes */
3026 memset(&ht_oper->basic_set, 0, 16);
3027 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
3029 return pos + sizeof(struct ieee80211_ht_operation);
3032 void ieee80211_ie_build_wide_bw_cs(u8 *pos,
3033 const struct cfg80211_chan_def *chandef)
3035 *pos++ = WLAN_EID_WIDE_BW_CHANNEL_SWITCH; /* EID */
3036 *pos++ = 3; /* IE length */
3037 /* New channel width */
3038 switch (chandef->width) {
3039 case NL80211_CHAN_WIDTH_80:
3040 *pos++ = IEEE80211_VHT_CHANWIDTH_80MHZ;
3042 case NL80211_CHAN_WIDTH_160:
3043 *pos++ = IEEE80211_VHT_CHANWIDTH_160MHZ;
3045 case NL80211_CHAN_WIDTH_80P80:
3046 *pos++ = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
3049 *pos++ = IEEE80211_VHT_CHANWIDTH_USE_HT;
3052 /* new center frequency segment 0 */
3053 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq1);
3054 /* new center frequency segment 1 */
3055 if (chandef->center_freq2)
3056 *pos++ = ieee80211_frequency_to_channel(chandef->center_freq2);
3061 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
3062 const struct cfg80211_chan_def *chandef)
3064 struct ieee80211_vht_operation *vht_oper;
3066 *pos++ = WLAN_EID_VHT_OPERATION;
3067 *pos++ = sizeof(struct ieee80211_vht_operation);
3068 vht_oper = (struct ieee80211_vht_operation *)pos;
3069 vht_oper->center_freq_seg0_idx = ieee80211_frequency_to_channel(
3070 chandef->center_freq1);
3071 if (chandef->center_freq2)
3072 vht_oper->center_freq_seg1_idx =
3073 ieee80211_frequency_to_channel(chandef->center_freq2);
3075 vht_oper->center_freq_seg1_idx = 0x00;
3077 switch (chandef->width) {
3078 case NL80211_CHAN_WIDTH_160:
3080 * Convert 160 MHz channel width to new style as interop
3083 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3084 vht_oper->center_freq_seg1_idx = vht_oper->center_freq_seg0_idx;
3085 if (chandef->chan->center_freq < chandef->center_freq1)
3086 vht_oper->center_freq_seg0_idx -= 8;
3088 vht_oper->center_freq_seg0_idx += 8;
3090 case NL80211_CHAN_WIDTH_80P80:
3092 * Convert 80+80 MHz channel width to new style as interop
3095 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3097 case NL80211_CHAN_WIDTH_80:
3098 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
3101 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
3105 /* don't require special VHT peer rates */
3106 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
3108 return pos + sizeof(struct ieee80211_vht_operation);
3111 u8 *ieee80211_ie_build_he_oper(u8 *pos, struct cfg80211_chan_def *chandef)
3113 struct ieee80211_he_operation *he_oper;
3114 struct ieee80211_he_6ghz_oper *he_6ghz_op;
3116 u8 ie_len = 1 + sizeof(struct ieee80211_he_operation);
3118 if (chandef->chan->band == NL80211_BAND_6GHZ)
3119 ie_len += sizeof(struct ieee80211_he_6ghz_oper);
3121 *pos++ = WLAN_EID_EXTENSION;
3123 *pos++ = WLAN_EID_EXT_HE_OPERATION;
3126 he_oper_params |= u32_encode_bits(1023, /* disabled */
3127 IEEE80211_HE_OPERATION_RTS_THRESHOLD_MASK);
3128 he_oper_params |= u32_encode_bits(1,
3129 IEEE80211_HE_OPERATION_ER_SU_DISABLE);
3130 he_oper_params |= u32_encode_bits(1,
3131 IEEE80211_HE_OPERATION_BSS_COLOR_DISABLED);
3132 if (chandef->chan->band == NL80211_BAND_6GHZ)
3133 he_oper_params |= u32_encode_bits(1,
3134 IEEE80211_HE_OPERATION_6GHZ_OP_INFO);
3136 he_oper = (struct ieee80211_he_operation *)pos;
3137 he_oper->he_oper_params = cpu_to_le32(he_oper_params);
3139 /* don't require special HE peer rates */
3140 he_oper->he_mcs_nss_set = cpu_to_le16(0xffff);
3141 pos += sizeof(struct ieee80211_he_operation);
3143 if (chandef->chan->band != NL80211_BAND_6GHZ)
3146 /* TODO add VHT operational */
3147 he_6ghz_op = (struct ieee80211_he_6ghz_oper *)pos;
3148 he_6ghz_op->minrate = 6; /* 6 Mbps */
3149 he_6ghz_op->primary =
3150 ieee80211_frequency_to_channel(chandef->chan->center_freq);
3152 ieee80211_frequency_to_channel(chandef->center_freq1);
3153 if (chandef->center_freq2)
3155 ieee80211_frequency_to_channel(chandef->center_freq2);
3157 he_6ghz_op->ccfs1 = 0;
3159 switch (chandef->width) {
3160 case NL80211_CHAN_WIDTH_160:
3161 /* Convert 160 MHz channel width to new style as interop
3164 he_6ghz_op->control =
3165 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3166 he_6ghz_op->ccfs1 = he_6ghz_op->ccfs0;
3167 if (chandef->chan->center_freq < chandef->center_freq1)
3168 he_6ghz_op->ccfs0 -= 8;
3170 he_6ghz_op->ccfs0 += 8;
3172 case NL80211_CHAN_WIDTH_80P80:
3173 he_6ghz_op->control =
3174 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ;
3176 case NL80211_CHAN_WIDTH_80:
3177 he_6ghz_op->control =
3178 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ;
3180 case NL80211_CHAN_WIDTH_40:
3181 he_6ghz_op->control =
3182 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ;
3185 he_6ghz_op->control =
3186 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ;
3190 pos += sizeof(struct ieee80211_he_6ghz_oper);
3196 bool ieee80211_chandef_ht_oper(const struct ieee80211_ht_operation *ht_oper,
3197 struct cfg80211_chan_def *chandef)
3199 enum nl80211_channel_type channel_type;
3204 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
3205 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
3206 channel_type = NL80211_CHAN_HT20;
3208 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
3209 channel_type = NL80211_CHAN_HT40PLUS;
3211 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
3212 channel_type = NL80211_CHAN_HT40MINUS;
3215 channel_type = NL80211_CHAN_NO_HT;
3219 cfg80211_chandef_create(chandef, chandef->chan, channel_type);
3223 bool ieee80211_chandef_vht_oper(struct ieee80211_hw *hw, u32 vht_cap_info,
3224 const struct ieee80211_vht_operation *oper,
3225 const struct ieee80211_ht_operation *htop,
3226 struct cfg80211_chan_def *chandef)
3228 struct cfg80211_chan_def new = *chandef;
3230 int ccfs0, ccfs1, ccfs2;
3233 bool support_80_80 = false;
3234 bool support_160 = false;
3235 u8 ext_nss_bw_supp = u32_get_bits(vht_cap_info,
3236 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK);
3237 u8 supp_chwidth = u32_get_bits(vht_cap_info,
3238 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK);
3243 vht_cap = hw->wiphy->bands[chandef->chan->band]->vht_cap.cap;
3244 support_160 = (vht_cap & (IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_MASK |
3245 IEEE80211_VHT_CAP_EXT_NSS_BW_MASK));
3246 support_80_80 = ((vht_cap &
3247 IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160_80PLUS80MHZ) ||
3248 (vht_cap & IEEE80211_VHT_CAP_SUPP_CHAN_WIDTH_160MHZ &&
3249 vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) ||
3250 ((vht_cap & IEEE80211_VHT_CAP_EXT_NSS_BW_MASK) >>
3251 IEEE80211_VHT_CAP_EXT_NSS_BW_SHIFT > 1));
3252 ccfs0 = oper->center_freq_seg0_idx;
3253 ccfs1 = oper->center_freq_seg1_idx;
3254 ccfs2 = (le16_to_cpu(htop->operation_mode) &
3255 IEEE80211_HT_OP_MODE_CCFS2_MASK)
3256 >> IEEE80211_HT_OP_MODE_CCFS2_SHIFT;
3260 /* if not supported, parse as though we didn't understand it */
3261 if (!ieee80211_hw_check(hw, SUPPORTS_VHT_EXT_NSS_BW))
3262 ext_nss_bw_supp = 0;
3265 * Cf. IEEE 802.11 Table 9-250
3267 * We really just consider that because it's inefficient to connect
3268 * at a higher bandwidth than we'll actually be able to use.
3270 switch ((supp_chwidth << 4) | ext_nss_bw_supp) {
3274 support_160 = false;
3275 support_80_80 = false;
3278 support_80_80 = false;
3301 cf0 = ieee80211_channel_to_frequency(ccf0, chandef->chan->band);
3302 cf1 = ieee80211_channel_to_frequency(ccf1, chandef->chan->band);
3304 switch (oper->chan_width) {
3305 case IEEE80211_VHT_CHANWIDTH_USE_HT:
3306 /* just use HT information directly */
3308 case IEEE80211_VHT_CHANWIDTH_80MHZ:
3309 new.width = NL80211_CHAN_WIDTH_80;
3310 new.center_freq1 = cf0;
3311 /* If needed, adjust based on the newer interop workaround. */
3315 diff = abs(ccf1 - ccf0);
3316 if ((diff == 8) && support_160) {
3317 new.width = NL80211_CHAN_WIDTH_160;
3318 new.center_freq1 = cf1;
3319 } else if ((diff > 8) && support_80_80) {
3320 new.width = NL80211_CHAN_WIDTH_80P80;
3321 new.center_freq2 = cf1;
3325 case IEEE80211_VHT_CHANWIDTH_160MHZ:
3326 /* deprecated encoding */
3327 new.width = NL80211_CHAN_WIDTH_160;
3328 new.center_freq1 = cf0;
3330 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
3331 /* deprecated encoding */
3332 new.width = NL80211_CHAN_WIDTH_80P80;
3333 new.center_freq1 = cf0;
3334 new.center_freq2 = cf1;
3340 if (!cfg80211_chandef_valid(&new))
3347 bool ieee80211_chandef_he_6ghz_oper(struct ieee80211_sub_if_data *sdata,
3348 const struct ieee80211_he_operation *he_oper,
3349 struct cfg80211_chan_def *chandef)
3351 struct ieee80211_local *local = sdata->local;
3352 struct ieee80211_supported_band *sband;
3353 enum nl80211_iftype iftype = ieee80211_vif_type_p2p(&sdata->vif);
3354 const struct ieee80211_sta_he_cap *he_cap;
3355 struct cfg80211_chan_def he_chandef = *chandef;
3356 const struct ieee80211_he_6ghz_oper *he_6ghz_oper;
3357 bool support_80_80, support_160;
3361 if (chandef->chan->band != NL80211_BAND_6GHZ)
3364 sband = local->hw.wiphy->bands[NL80211_BAND_6GHZ];
3366 he_cap = ieee80211_get_he_iftype_cap(sband, iftype);
3368 sdata_info(sdata, "Missing iftype sband data/HE cap");
3372 he_phy_cap = he_cap->he_cap_elem.phy_cap_info[0];
3375 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_160MHZ_IN_5G;
3378 IEEE80211_HE_PHY_CAP0_CHANNEL_WIDTH_SET_80PLUS80_MHZ_IN_5G;
3382 "HE is not advertised on (on %d MHz), expect issues\n",
3383 chandef->chan->center_freq);
3387 he_6ghz_oper = ieee80211_he_6ghz_oper(he_oper);
3389 if (!he_6ghz_oper) {
3391 "HE 6GHz operation missing (on %d MHz), expect issues\n",
3392 chandef->chan->center_freq);
3396 freq = ieee80211_channel_to_frequency(he_6ghz_oper->primary,
3398 he_chandef.chan = ieee80211_get_channel(sdata->local->hw.wiphy, freq);
3400 switch (u8_get_bits(he_6ghz_oper->control,
3401 IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH)) {
3402 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_20MHZ:
3403 he_chandef.width = NL80211_CHAN_WIDTH_20;
3405 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_40MHZ:
3406 he_chandef.width = NL80211_CHAN_WIDTH_40;
3408 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_80MHZ:
3409 he_chandef.width = NL80211_CHAN_WIDTH_80;
3411 case IEEE80211_HE_6GHZ_OPER_CTRL_CHANWIDTH_160MHZ:
3412 he_chandef.width = NL80211_CHAN_WIDTH_80;
3413 if (!he_6ghz_oper->ccfs1)
3415 if (abs(he_6ghz_oper->ccfs1 - he_6ghz_oper->ccfs0) == 8) {
3417 he_chandef.width = NL80211_CHAN_WIDTH_160;
3420 he_chandef.width = NL80211_CHAN_WIDTH_80P80;
3425 if (he_chandef.width == NL80211_CHAN_WIDTH_160) {
3426 he_chandef.center_freq1 =
3427 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3430 he_chandef.center_freq1 =
3431 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs0,
3433 if (support_80_80 || support_160)
3434 he_chandef.center_freq2 =
3435 ieee80211_channel_to_frequency(he_6ghz_oper->ccfs1,
3439 if (!cfg80211_chandef_valid(&he_chandef)) {
3441 "HE 6GHz operation resulted in invalid chandef: %d MHz/%d/%d MHz/%d MHz\n",
3442 he_chandef.chan ? he_chandef.chan->center_freq : 0,
3444 he_chandef.center_freq1,
3445 he_chandef.center_freq2);
3449 *chandef = he_chandef;
3454 bool ieee80211_chandef_s1g_oper(const struct ieee80211_s1g_oper_ie *oper,
3455 struct cfg80211_chan_def *chandef)
3462 switch (FIELD_GET(S1G_OPER_CH_WIDTH_OPER, oper->ch_width)) {
3463 case IEEE80211_S1G_CHANWIDTH_1MHZ:
3464 chandef->width = NL80211_CHAN_WIDTH_1;
3466 case IEEE80211_S1G_CHANWIDTH_2MHZ:
3467 chandef->width = NL80211_CHAN_WIDTH_2;
3469 case IEEE80211_S1G_CHANWIDTH_4MHZ:
3470 chandef->width = NL80211_CHAN_WIDTH_4;
3472 case IEEE80211_S1G_CHANWIDTH_8MHZ:
3473 chandef->width = NL80211_CHAN_WIDTH_8;
3475 case IEEE80211_S1G_CHANWIDTH_16MHZ:
3476 chandef->width = NL80211_CHAN_WIDTH_16;
3482 oper_freq = ieee80211_channel_to_freq_khz(oper->oper_ch,
3483 NL80211_BAND_S1GHZ);
3484 chandef->center_freq1 = KHZ_TO_MHZ(oper_freq);
3485 chandef->freq1_offset = oper_freq % 1000;
3490 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
3491 const struct ieee80211_supported_band *sband,
3492 const u8 *srates, int srates_len, u32 *rates)
3494 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
3495 int shift = ieee80211_chandef_get_shift(chandef);
3496 struct ieee80211_rate *br;
3497 int brate, rate, i, j, count = 0;
3501 for (i = 0; i < srates_len; i++) {
3502 rate = srates[i] & 0x7f;
3504 for (j = 0; j < sband->n_bitrates; j++) {
3505 br = &sband->bitrates[j];
3506 if ((rate_flags & br->flags) != rate_flags)
3509 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
3510 if (brate == rate) {
3520 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
3521 struct sk_buff *skb, bool need_basic,
3522 enum nl80211_band band)
3524 struct ieee80211_local *local = sdata->local;
3525 struct ieee80211_supported_band *sband;
3528 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3531 shift = ieee80211_vif_get_shift(&sdata->vif);
3532 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3533 sband = local->hw.wiphy->bands[band];
3535 for (i = 0; i < sband->n_bitrates; i++) {
3536 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3543 if (skb_tailroom(skb) < rates + 2)
3546 pos = skb_put(skb, rates + 2);
3547 *pos++ = WLAN_EID_SUPP_RATES;
3549 for (i = 0; i < rates; i++) {
3551 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3554 if (need_basic && basic_rates & BIT(i))
3556 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3558 *pos++ = basic | (u8) rate;
3564 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
3565 struct sk_buff *skb, bool need_basic,
3566 enum nl80211_band band)
3568 struct ieee80211_local *local = sdata->local;
3569 struct ieee80211_supported_band *sband;
3571 u8 i, exrates, *pos;
3572 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
3575 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
3576 shift = ieee80211_vif_get_shift(&sdata->vif);
3578 sband = local->hw.wiphy->bands[band];
3580 for (i = 0; i < sband->n_bitrates; i++) {
3581 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
3591 if (skb_tailroom(skb) < exrates + 2)
3595 pos = skb_put(skb, exrates + 2);
3596 *pos++ = WLAN_EID_EXT_SUPP_RATES;
3598 for (i = 8; i < sband->n_bitrates; i++) {
3600 if ((rate_flags & sband->bitrates[i].flags)
3603 if (need_basic && basic_rates & BIT(i))
3605 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
3607 *pos++ = basic | (u8) rate;
3613 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
3615 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
3616 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
3618 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
3619 /* non-managed type inferfaces */
3622 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
3624 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
3626 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
3631 /* TODO: consider rx_highest */
3633 if (mcs->rx_mask[3])
3635 if (mcs->rx_mask[2])
3637 if (mcs->rx_mask[1])
3643 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
3644 * @local: mac80211 hw info struct
3645 * @status: RX status
3646 * @mpdu_len: total MPDU length (including FCS)
3647 * @mpdu_offset: offset into MPDU to calculate timestamp at
3649 * This function calculates the RX timestamp at the given MPDU offset, taking
3650 * into account what the RX timestamp was. An offset of 0 will just normalize
3651 * the timestamp to TSF at beginning of MPDU reception.
3653 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
3654 struct ieee80211_rx_status *status,
3655 unsigned int mpdu_len,
3656 unsigned int mpdu_offset)
3658 u64 ts = status->mactime;
3659 struct rate_info ri;
3663 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
3666 memset(&ri, 0, sizeof(ri));
3670 /* Fill cfg80211 rate info */
3671 switch (status->encoding) {
3673 ri.flags |= RATE_INFO_FLAGS_HE_MCS;
3674 ri.mcs = status->rate_idx;
3675 ri.nss = status->nss;
3676 ri.he_ru_alloc = status->he_ru;
3677 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3678 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3681 * See P802.11ax_D6.0, section 27.3.4 for
3684 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3690 * For HE MU PPDU, add the HE-SIG-B.
3691 * For HE ER PPDU, add 8us for the HE-SIG-A.
3692 * For HE TB PPDU, add 4us for the HE-STF.
3693 * Add the HE-LTF durations - variable.
3699 ri.mcs = status->rate_idx;
3700 ri.flags |= RATE_INFO_FLAGS_MCS;
3701 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3702 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3705 * See P802.11REVmd_D3.0, section 19.3.2 for
3708 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3710 if (status->enc_flags & RX_ENC_FLAG_HT_GF)
3716 * Add Data HT-LTFs per streams
3717 * TODO: add Extension HT-LTFs, 4us per LTF
3719 n_ltf = ((ri.mcs >> 3) & 3) + 1;
3720 n_ltf = n_ltf == 3 ? 4 : n_ltf;
3726 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
3727 ri.mcs = status->rate_idx;
3728 ri.nss = status->nss;
3729 if (status->enc_flags & RX_ENC_FLAG_SHORT_GI)
3730 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
3733 * See P802.11REVmd_D3.0, section 21.3.2 for
3736 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3741 * Add VHT-LTFs per streams
3743 n_ltf = (ri.nss != 1) && (ri.nss % 2) ?
3744 ri.nss + 1 : ri.nss;
3752 case RX_ENC_LEGACY: {
3753 struct ieee80211_supported_band *sband;
3757 switch (status->bw) {
3758 case RATE_INFO_BW_10:
3761 case RATE_INFO_BW_5:
3766 sband = local->hw.wiphy->bands[status->band];
3767 bitrate = sband->bitrates[status->rate_idx].bitrate;
3768 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
3770 if (status->flag & RX_FLAG_MACTIME_PLCP_START) {
3771 if (status->band == NL80211_BAND_5GHZ) {
3774 } else if (status->enc_flags & RX_ENC_FLAG_SHORTPRE) {
3784 rate = cfg80211_calculate_bitrate(&ri);
3785 if (WARN_ONCE(!rate,
3786 "Invalid bitrate: flags=0x%llx, idx=%d, vht_nss=%d\n",
3787 (unsigned long long)status->flag, status->rate_idx,
3791 /* rewind from end of MPDU */
3792 if (status->flag & RX_FLAG_MACTIME_END)
3793 ts -= mpdu_len * 8 * 10 / rate;
3795 ts += mpdu_offset * 8 * 10 / rate;
3800 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
3802 struct ieee80211_sub_if_data *sdata;
3803 struct cfg80211_chan_def chandef;
3805 /* for interface list, to avoid linking iflist_mtx and chanctx_mtx */
3806 lockdep_assert_wiphy(local->hw.wiphy);
3808 mutex_lock(&local->mtx);
3809 list_for_each_entry(sdata, &local->interfaces, list) {
3810 /* it might be waiting for the local->mtx, but then
3811 * by the time it gets it, sdata->wdev.cac_started
3812 * will no longer be true
3814 cancel_delayed_work(&sdata->dfs_cac_timer_work);
3816 if (sdata->wdev.cac_started) {
3817 chandef = sdata->vif.bss_conf.chandef;
3818 ieee80211_vif_release_channel(sdata);
3819 cfg80211_cac_event(sdata->dev,
3821 NL80211_RADAR_CAC_ABORTED,
3825 mutex_unlock(&local->mtx);
3828 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
3830 struct ieee80211_local *local =
3831 container_of(work, struct ieee80211_local, radar_detected_work);
3832 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
3833 struct ieee80211_chanctx *ctx;
3834 int num_chanctx = 0;
3836 mutex_lock(&local->chanctx_mtx);
3837 list_for_each_entry(ctx, &local->chanctx_list, list) {
3838 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
3842 chandef = ctx->conf.def;
3844 mutex_unlock(&local->chanctx_mtx);
3846 wiphy_lock(local->hw.wiphy);
3847 ieee80211_dfs_cac_cancel(local);
3848 wiphy_unlock(local->hw.wiphy);
3850 if (num_chanctx > 1)
3851 /* XXX: multi-channel is not supported yet */
3854 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
3857 void ieee80211_radar_detected(struct ieee80211_hw *hw)
3859 struct ieee80211_local *local = hw_to_local(hw);
3861 trace_api_radar_detected(local);
3863 schedule_work(&local->radar_detected_work);
3865 EXPORT_SYMBOL(ieee80211_radar_detected);
3867 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
3873 case NL80211_CHAN_WIDTH_20:
3874 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3875 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3877 case NL80211_CHAN_WIDTH_40:
3878 c->width = NL80211_CHAN_WIDTH_20;
3879 c->center_freq1 = c->chan->center_freq;
3880 ret = IEEE80211_STA_DISABLE_40MHZ |
3881 IEEE80211_STA_DISABLE_VHT;
3883 case NL80211_CHAN_WIDTH_80:
3884 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
3888 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
3889 c->width = NL80211_CHAN_WIDTH_40;
3890 ret = IEEE80211_STA_DISABLE_VHT;
3892 case NL80211_CHAN_WIDTH_80P80:
3893 c->center_freq2 = 0;
3894 c->width = NL80211_CHAN_WIDTH_80;
3895 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3896 IEEE80211_STA_DISABLE_160MHZ;
3898 case NL80211_CHAN_WIDTH_160:
3900 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
3903 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
3904 c->width = NL80211_CHAN_WIDTH_80;
3905 ret = IEEE80211_STA_DISABLE_80P80MHZ |
3906 IEEE80211_STA_DISABLE_160MHZ;
3909 case NL80211_CHAN_WIDTH_20_NOHT:
3911 c->width = NL80211_CHAN_WIDTH_20_NOHT;
3912 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3914 case NL80211_CHAN_WIDTH_1:
3915 case NL80211_CHAN_WIDTH_2:
3916 case NL80211_CHAN_WIDTH_4:
3917 case NL80211_CHAN_WIDTH_8:
3918 case NL80211_CHAN_WIDTH_16:
3919 case NL80211_CHAN_WIDTH_5:
3920 case NL80211_CHAN_WIDTH_10:
3923 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
3927 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
3933 * Returns true if smps_mode_new is strictly more restrictive than
3936 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
3937 enum ieee80211_smps_mode smps_mode_new)
3939 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
3940 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
3943 switch (smps_mode_old) {
3944 case IEEE80211_SMPS_STATIC:
3946 case IEEE80211_SMPS_DYNAMIC:
3947 return smps_mode_new == IEEE80211_SMPS_STATIC;
3948 case IEEE80211_SMPS_OFF:
3949 return smps_mode_new != IEEE80211_SMPS_OFF;
3957 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
3958 struct cfg80211_csa_settings *csa_settings)
3960 struct sk_buff *skb;
3961 struct ieee80211_mgmt *mgmt;
3962 struct ieee80211_local *local = sdata->local;
3964 int hdr_len = offsetofend(struct ieee80211_mgmt,
3965 u.action.u.chan_switch);
3968 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
3969 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
3972 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
3973 5 + /* channel switch announcement element */
3974 3 + /* secondary channel offset element */
3975 5 + /* wide bandwidth channel switch announcement */
3976 8); /* mesh channel switch parameters element */
3980 skb_reserve(skb, local->tx_headroom);
3981 mgmt = skb_put_zero(skb, hdr_len);
3982 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
3983 IEEE80211_STYPE_ACTION);
3985 eth_broadcast_addr(mgmt->da);
3986 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
3987 if (ieee80211_vif_is_mesh(&sdata->vif)) {
3988 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
3990 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
3991 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
3993 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
3994 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
3995 pos = skb_put(skb, 5);
3996 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
3997 *pos++ = 3; /* IE length */
3998 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
3999 freq = csa_settings->chandef.chan->center_freq;
4000 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
4001 *pos++ = csa_settings->count; /* count */
4003 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
4004 enum nl80211_channel_type ch_type;
4007 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
4008 *pos++ = 1; /* IE length */
4009 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
4010 if (ch_type == NL80211_CHAN_HT40PLUS)
4011 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
4013 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
4016 if (ieee80211_vif_is_mesh(&sdata->vif)) {
4017 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
4020 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
4021 *pos++ = 6; /* IE length */
4022 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
4023 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
4024 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
4025 *pos++ |= csa_settings->block_tx ?
4026 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
4027 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
4029 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
4033 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_80 ||
4034 csa_settings->chandef.width == NL80211_CHAN_WIDTH_80P80 ||
4035 csa_settings->chandef.width == NL80211_CHAN_WIDTH_160) {
4037 ieee80211_ie_build_wide_bw_cs(pos, &csa_settings->chandef);
4040 ieee80211_tx_skb(sdata, skb);
4044 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
4046 return !(cs == NULL || cs->cipher == 0 ||
4047 cs->hdr_len < cs->pn_len + cs->pn_off ||
4048 cs->hdr_len <= cs->key_idx_off ||
4049 cs->key_idx_shift > 7 ||
4050 cs->key_idx_mask == 0);
4053 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
4057 /* Ensure we have enough iftype bitmap space for all iftype values */
4058 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
4060 for (i = 0; i < n; i++)
4061 if (!ieee80211_cs_valid(&cs[i]))
4067 const struct ieee80211_cipher_scheme *
4068 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
4069 enum nl80211_iftype iftype)
4071 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
4072 int n = local->hw.n_cipher_schemes;
4074 const struct ieee80211_cipher_scheme *cs = NULL;
4076 for (i = 0; i < n; i++) {
4077 if (l[i].cipher == cipher) {
4083 if (!cs || !(cs->iftype & BIT(iftype)))
4089 int ieee80211_cs_headroom(struct ieee80211_local *local,
4090 struct cfg80211_crypto_settings *crypto,
4091 enum nl80211_iftype iftype)
4093 const struct ieee80211_cipher_scheme *cs;
4094 int headroom = IEEE80211_ENCRYPT_HEADROOM;
4097 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
4098 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
4101 if (cs && headroom < cs->hdr_len)
4102 headroom = cs->hdr_len;
4105 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
4106 if (cs && headroom < cs->hdr_len)
4107 headroom = cs->hdr_len;
4113 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
4115 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
4122 if (data->count[i] == 1)
4125 if (data->desc[i].interval == 0)
4128 /* End time is in the past, check for repetitions */
4129 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
4130 if (data->count[i] < 255) {
4131 if (data->count[i] <= skip) {
4136 data->count[i] -= skip;
4139 data->desc[i].start += skip * data->desc[i].interval;
4145 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
4151 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4154 if (!data->count[i])
4157 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
4160 cur = data->desc[i].start - tsf;
4164 cur = data->desc[i].start + data->desc[i].duration - tsf;
4173 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
4178 * arbitrary limit, used to avoid infinite loops when combined NoA
4179 * descriptors cover the full time period.
4183 ieee80211_extend_absent_time(data, tsf, &offset);
4185 if (!ieee80211_extend_absent_time(data, tsf, &offset))
4189 } while (tries < max_tries);
4194 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
4196 u32 next_offset = BIT(31) - 1;
4200 data->has_next_tsf = false;
4201 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4204 if (!data->count[i])
4207 ieee80211_extend_noa_desc(data, tsf, i);
4208 start = data->desc[i].start - tsf;
4210 data->absent |= BIT(i);
4212 if (next_offset > start)
4213 next_offset = start;
4215 data->has_next_tsf = true;
4219 next_offset = ieee80211_get_noa_absent_time(data, tsf);
4221 data->next_tsf = tsf + next_offset;
4223 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
4225 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
4226 struct ieee80211_noa_data *data, u32 tsf)
4231 memset(data, 0, sizeof(*data));
4233 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
4234 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
4236 if (!desc->count || !desc->duration)
4239 data->count[i] = desc->count;
4240 data->desc[i].start = le32_to_cpu(desc->start_time);
4241 data->desc[i].duration = le32_to_cpu(desc->duration);
4242 data->desc[i].interval = le32_to_cpu(desc->interval);
4244 if (data->count[i] > 1 &&
4245 data->desc[i].interval < data->desc[i].duration)
4248 ieee80211_extend_noa_desc(data, tsf, i);
4253 ieee80211_update_p2p_noa(data, tsf);
4257 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
4259 void ieee80211_recalc_dtim(struct ieee80211_local *local,
4260 struct ieee80211_sub_if_data *sdata)
4262 u64 tsf = drv_get_tsf(local, sdata);
4264 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
4265 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
4269 if (tsf == -1ULL || !beacon_int || !dtim_period)
4272 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4273 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
4277 ps = &sdata->bss->ps;
4278 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
4279 ps = &sdata->u.mesh.ps;
4285 * actually finds last dtim_count, mac80211 will update in
4286 * __beacon_add_tim().
4287 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
4289 do_div(tsf, beacon_int);
4290 bcns_from_dtim = do_div(tsf, dtim_period);
4291 /* just had a DTIM */
4292 if (!bcns_from_dtim)
4295 dtim_count = dtim_period - bcns_from_dtim;
4297 ps->dtim_count = dtim_count;
4300 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
4301 struct ieee80211_chanctx *ctx)
4303 struct ieee80211_sub_if_data *sdata;
4304 u8 radar_detect = 0;
4306 lockdep_assert_held(&local->chanctx_mtx);
4308 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
4311 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
4312 if (sdata->reserved_radar_required)
4313 radar_detect |= BIT(sdata->reserved_chandef.width);
4316 * An in-place reservation context should not have any assigned vifs
4317 * until it replaces the other context.
4319 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
4320 !list_empty(&ctx->assigned_vifs));
4322 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
4323 if (sdata->radar_required)
4324 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
4326 return radar_detect;
4329 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
4330 const struct cfg80211_chan_def *chandef,
4331 enum ieee80211_chanctx_mode chanmode,
4334 struct ieee80211_local *local = sdata->local;
4335 struct ieee80211_sub_if_data *sdata_iter;
4336 enum nl80211_iftype iftype = sdata->wdev.iftype;
4337 struct ieee80211_chanctx *ctx;
4339 struct iface_combination_params params = {
4340 .radar_detect = radar_detect,
4343 lockdep_assert_held(&local->chanctx_mtx);
4345 if (WARN_ON(hweight32(radar_detect) > 1))
4348 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4352 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
4355 if (sdata->vif.type == NL80211_IFTYPE_AP ||
4356 sdata->vif.type == NL80211_IFTYPE_MESH_POINT) {
4358 * always passing this is harmless, since it'll be the
4359 * same value that cfg80211 finds if it finds the same
4360 * interface ... and that's always allowed
4362 params.new_beacon_int = sdata->vif.bss_conf.beacon_int;
4365 /* Always allow software iftypes */
4366 if (cfg80211_iftype_allowed(local->hw.wiphy, iftype, 0, 1)) {
4373 params.num_different_channels = 1;
4375 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
4376 params.iftype_num[iftype] = 1;
4378 list_for_each_entry(ctx, &local->chanctx_list, list) {
4379 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4381 params.radar_detect |=
4382 ieee80211_chanctx_radar_detect(local, ctx);
4383 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
4384 params.num_different_channels++;
4387 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
4388 cfg80211_chandef_compatible(chandef,
4391 params.num_different_channels++;
4394 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
4395 struct wireless_dev *wdev_iter;
4397 wdev_iter = &sdata_iter->wdev;
4399 if (sdata_iter == sdata ||
4400 !ieee80211_sdata_running(sdata_iter) ||
4401 cfg80211_iftype_allowed(local->hw.wiphy,
4402 wdev_iter->iftype, 0, 1))
4405 params.iftype_num[wdev_iter->iftype]++;
4409 if (total == 1 && !params.radar_detect)
4412 return cfg80211_check_combinations(local->hw.wiphy, ¶ms);
4416 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
4419 u32 *max_num_different_channels = data;
4421 *max_num_different_channels = max(*max_num_different_channels,
4422 c->num_different_channels);
4425 int ieee80211_max_num_channels(struct ieee80211_local *local)
4427 struct ieee80211_sub_if_data *sdata;
4428 struct ieee80211_chanctx *ctx;
4429 u32 max_num_different_channels = 1;
4431 struct iface_combination_params params = {0};
4433 lockdep_assert_held(&local->chanctx_mtx);
4435 list_for_each_entry(ctx, &local->chanctx_list, list) {
4436 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
4439 params.num_different_channels++;
4441 params.radar_detect |=
4442 ieee80211_chanctx_radar_detect(local, ctx);
4445 list_for_each_entry_rcu(sdata, &local->interfaces, list)
4446 params.iftype_num[sdata->wdev.iftype]++;
4448 err = cfg80211_iter_combinations(local->hw.wiphy, ¶ms,
4449 ieee80211_iter_max_chans,
4450 &max_num_different_channels);
4454 return max_num_different_channels;
4457 void ieee80211_add_s1g_capab_ie(struct ieee80211_sub_if_data *sdata,
4458 struct ieee80211_sta_s1g_cap *caps,
4459 struct sk_buff *skb)
4461 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
4462 struct ieee80211_s1g_cap s1g_capab;
4466 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
4472 memcpy(s1g_capab.capab_info, caps->cap, sizeof(caps->cap));
4473 memcpy(s1g_capab.supp_mcs_nss, caps->nss_mcs, sizeof(caps->nss_mcs));
4475 /* override the capability info */
4476 for (i = 0; i < sizeof(ifmgd->s1g_capa.capab_info); i++) {
4477 u8 mask = ifmgd->s1g_capa_mask.capab_info[i];
4479 s1g_capab.capab_info[i] &= ~mask;
4480 s1g_capab.capab_info[i] |= ifmgd->s1g_capa.capab_info[i] & mask;
4483 /* then MCS and NSS set */
4484 for (i = 0; i < sizeof(ifmgd->s1g_capa.supp_mcs_nss); i++) {
4485 u8 mask = ifmgd->s1g_capa_mask.supp_mcs_nss[i];
4487 s1g_capab.supp_mcs_nss[i] &= ~mask;
4488 s1g_capab.supp_mcs_nss[i] |=
4489 ifmgd->s1g_capa.supp_mcs_nss[i] & mask;
4492 pos = skb_put(skb, 2 + sizeof(s1g_capab));
4493 *pos++ = WLAN_EID_S1G_CAPABILITIES;
4494 *pos++ = sizeof(s1g_capab);
4496 memcpy(pos, &s1g_capab, sizeof(s1g_capab));
4499 void ieee80211_add_aid_request_ie(struct ieee80211_sub_if_data *sdata,
4500 struct sk_buff *skb)
4502 u8 *pos = skb_put(skb, 3);
4504 *pos++ = WLAN_EID_AID_REQUEST;
4509 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
4511 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
4512 *buf++ = 7; /* len */
4513 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
4516 *buf++ = 2; /* WME */
4517 *buf++ = 0; /* WME info */
4518 *buf++ = 1; /* WME ver */
4519 *buf++ = qosinfo; /* U-APSD no in use */
4524 void ieee80211_txq_get_depth(struct ieee80211_txq *txq,
4525 unsigned long *frame_cnt,
4526 unsigned long *byte_cnt)
4528 struct txq_info *txqi = to_txq_info(txq);
4529 u32 frag_cnt = 0, frag_bytes = 0;
4530 struct sk_buff *skb;
4532 skb_queue_walk(&txqi->frags, skb) {
4534 frag_bytes += skb->len;
4538 *frame_cnt = txqi->tin.backlog_packets + frag_cnt;
4541 *byte_cnt = txqi->tin.backlog_bytes + frag_bytes;
4543 EXPORT_SYMBOL(ieee80211_txq_get_depth);
4545 const u8 ieee80211_ac_to_qos_mask[IEEE80211_NUM_ACS] = {
4546 IEEE80211_WMM_IE_STA_QOSINFO_AC_VO,
4547 IEEE80211_WMM_IE_STA_QOSINFO_AC_VI,
4548 IEEE80211_WMM_IE_STA_QOSINFO_AC_BE,
4549 IEEE80211_WMM_IE_STA_QOSINFO_AC_BK
4552 u16 ieee80211_encode_usf(int listen_interval)
4554 static const int listen_int_usf[] = { 1, 10, 1000, 10000 };
4557 /* find greatest USF */
4558 while (usf < IEEE80211_MAX_USF) {
4559 if (listen_interval % listen_int_usf[usf + 1])
4563 ui = listen_interval / listen_int_usf[usf];
4565 /* error if there is a remainder. Should've been checked by user */
4566 WARN_ON_ONCE(ui > IEEE80211_MAX_UI);
4567 listen_interval = FIELD_PREP(LISTEN_INT_USF, usf) |
4568 FIELD_PREP(LISTEN_INT_UI, ui);
4570 return (u16) listen_interval;