2 * Copyright 2002-2005, Instant802 Networks, Inc.
3 * Copyright 2005-2006, Devicescape Software, Inc.
4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz>
5 * Copyright 2007 Johannes Berg <johannes@sipsolutions.net>
6 * Copyright 2013-2014 Intel Mobile Communications GmbH
7 * Copyright (C) 2015 Intel Deutschland GmbH
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
13 * utilities for mac80211
16 #include <net/mac80211.h>
17 #include <linux/netdevice.h>
18 #include <linux/export.h>
19 #include <linux/types.h>
20 #include <linux/slab.h>
21 #include <linux/skbuff.h>
22 #include <linux/etherdevice.h>
23 #include <linux/if_arp.h>
24 #include <linux/bitmap.h>
25 #include <linux/crc32.h>
26 #include <net/net_namespace.h>
27 #include <net/cfg80211.h>
28 #include <net/rtnetlink.h>
30 #include "ieee80211_i.h"
31 #include "driver-ops.h"
38 /* privid for wiphys to determine whether they belong to us or not */
39 const void *const mac80211_wiphy_privid = &mac80211_wiphy_privid;
41 struct ieee80211_hw *wiphy_to_ieee80211_hw(struct wiphy *wiphy)
43 struct ieee80211_local *local;
46 local = wiphy_priv(wiphy);
49 EXPORT_SYMBOL(wiphy_to_ieee80211_hw);
51 void ieee80211_tx_set_protected(struct ieee80211_tx_data *tx)
54 struct ieee80211_hdr *hdr;
56 skb_queue_walk(&tx->skbs, skb) {
57 hdr = (struct ieee80211_hdr *) skb->data;
58 hdr->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
62 int ieee80211_frame_duration(enum ieee80211_band band, size_t len,
63 int rate, int erp, int short_preamble,
68 /* calculate duration (in microseconds, rounded up to next higher
69 * integer if it includes a fractional microsecond) to send frame of
70 * len bytes (does not include FCS) at the given rate. Duration will
73 * rate is in 100 kbps, so divident is multiplied by 10 in the
74 * DIV_ROUND_UP() operations.
76 * shift may be 2 for 5 MHz channels or 1 for 10 MHz channels, and
77 * is assumed to be 0 otherwise.
80 if (band == IEEE80211_BAND_5GHZ || erp) {
84 * N_DBPS = DATARATE x 4
85 * N_SYM = Ceiling((16+8xLENGTH+6) / N_DBPS)
86 * (16 = SIGNAL time, 6 = tail bits)
87 * TXTIME = T_PREAMBLE + T_SIGNAL + T_SYM x N_SYM + Signal Ext
90 * 802.11a - 18.5.2: aSIFSTime = 16 usec
91 * 802.11g - 19.8.4: aSIFSTime = 10 usec +
94 dur = 16; /* SIFS + signal ext */
95 dur += 16; /* IEEE 802.11-2012 18.3.2.4: T_PREAMBLE = 16 usec */
96 dur += 4; /* IEEE 802.11-2012 18.3.2.4: T_SIGNAL = 4 usec */
98 /* IEEE 802.11-2012 18.3.2.4: all values above are:
100 * * times 2 for 10 MHz
104 /* rates should already consider the channel bandwidth,
105 * don't apply divisor again.
107 dur += 4 * DIV_ROUND_UP((16 + 8 * (len + 4) + 6) * 10,
108 4 * rate); /* T_SYM x N_SYM */
111 * 802.11b or 802.11g with 802.11b compatibility:
112 * 18.3.4: TXTIME = PreambleLength + PLCPHeaderTime +
113 * Ceiling(((LENGTH+PBCC)x8)/DATARATE). PBCC=0.
115 * 802.11 (DS): 15.3.3, 802.11b: 18.3.4
116 * aSIFSTime = 10 usec
117 * aPreambleLength = 144 usec or 72 usec with short preamble
118 * aPLCPHeaderLength = 48 usec or 24 usec with short preamble
120 dur = 10; /* aSIFSTime = 10 usec */
121 dur += short_preamble ? (72 + 24) : (144 + 48);
123 dur += DIV_ROUND_UP(8 * (len + 4) * 10, rate);
129 /* Exported duration function for driver use */
130 __le16 ieee80211_generic_frame_duration(struct ieee80211_hw *hw,
131 struct ieee80211_vif *vif,
132 enum ieee80211_band band,
134 struct ieee80211_rate *rate)
136 struct ieee80211_sub_if_data *sdata;
139 bool short_preamble = false;
143 sdata = vif_to_sdata(vif);
144 short_preamble = sdata->vif.bss_conf.use_short_preamble;
145 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
146 erp = rate->flags & IEEE80211_RATE_ERP_G;
147 shift = ieee80211_vif_get_shift(vif);
150 dur = ieee80211_frame_duration(band, frame_len, rate->bitrate, erp,
151 short_preamble, shift);
153 return cpu_to_le16(dur);
155 EXPORT_SYMBOL(ieee80211_generic_frame_duration);
157 __le16 ieee80211_rts_duration(struct ieee80211_hw *hw,
158 struct ieee80211_vif *vif, size_t frame_len,
159 const struct ieee80211_tx_info *frame_txctl)
161 struct ieee80211_local *local = hw_to_local(hw);
162 struct ieee80211_rate *rate;
163 struct ieee80211_sub_if_data *sdata;
165 int erp, shift = 0, bitrate;
167 struct ieee80211_supported_band *sband;
169 sband = local->hw.wiphy->bands[frame_txctl->band];
171 short_preamble = false;
173 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
177 sdata = vif_to_sdata(vif);
178 short_preamble = sdata->vif.bss_conf.use_short_preamble;
179 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
180 erp = rate->flags & IEEE80211_RATE_ERP_G;
181 shift = ieee80211_vif_get_shift(vif);
184 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
187 dur = ieee80211_frame_duration(sband->band, 10, bitrate,
188 erp, short_preamble, shift);
189 /* Data frame duration */
190 dur += ieee80211_frame_duration(sband->band, frame_len, bitrate,
191 erp, short_preamble, shift);
193 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
194 erp, short_preamble, shift);
196 return cpu_to_le16(dur);
198 EXPORT_SYMBOL(ieee80211_rts_duration);
200 __le16 ieee80211_ctstoself_duration(struct ieee80211_hw *hw,
201 struct ieee80211_vif *vif,
203 const struct ieee80211_tx_info *frame_txctl)
205 struct ieee80211_local *local = hw_to_local(hw);
206 struct ieee80211_rate *rate;
207 struct ieee80211_sub_if_data *sdata;
209 int erp, shift = 0, bitrate;
211 struct ieee80211_supported_band *sband;
213 sband = local->hw.wiphy->bands[frame_txctl->band];
215 short_preamble = false;
217 rate = &sband->bitrates[frame_txctl->control.rts_cts_rate_idx];
220 sdata = vif_to_sdata(vif);
221 short_preamble = sdata->vif.bss_conf.use_short_preamble;
222 if (sdata->flags & IEEE80211_SDATA_OPERATING_GMODE)
223 erp = rate->flags & IEEE80211_RATE_ERP_G;
224 shift = ieee80211_vif_get_shift(vif);
227 bitrate = DIV_ROUND_UP(rate->bitrate, 1 << shift);
229 /* Data frame duration */
230 dur = ieee80211_frame_duration(sband->band, frame_len, bitrate,
231 erp, short_preamble, shift);
232 if (!(frame_txctl->flags & IEEE80211_TX_CTL_NO_ACK)) {
234 dur += ieee80211_frame_duration(sband->band, 10, bitrate,
235 erp, short_preamble, shift);
238 return cpu_to_le16(dur);
240 EXPORT_SYMBOL(ieee80211_ctstoself_duration);
242 void ieee80211_propagate_queue_wake(struct ieee80211_local *local, int queue)
244 struct ieee80211_sub_if_data *sdata;
245 int n_acs = IEEE80211_NUM_ACS;
247 if (local->hw.queues < IEEE80211_NUM_ACS)
250 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
256 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE &&
257 local->queue_stop_reasons[sdata->vif.cab_queue] != 0)
260 for (ac = 0; ac < n_acs; ac++) {
261 int ac_queue = sdata->vif.hw_queue[ac];
263 if (local->ops->wake_tx_queue &&
264 (atomic_read(&sdata->txqs_len[ac]) >
265 local->hw.txq_ac_max_pending))
268 if (ac_queue == queue ||
269 (sdata->vif.cab_queue == queue &&
270 local->queue_stop_reasons[ac_queue] == 0 &&
271 skb_queue_empty(&local->pending[ac_queue])))
272 netif_wake_subqueue(sdata->dev, ac);
277 static void __ieee80211_wake_queue(struct ieee80211_hw *hw, int queue,
278 enum queue_stop_reason reason,
281 struct ieee80211_local *local = hw_to_local(hw);
283 trace_wake_queue(local, queue, reason);
285 if (WARN_ON(queue >= hw->queues))
288 if (!test_bit(reason, &local->queue_stop_reasons[queue]))
292 local->q_stop_reasons[queue][reason] = 0;
294 local->q_stop_reasons[queue][reason]--;
296 if (local->q_stop_reasons[queue][reason] == 0)
297 __clear_bit(reason, &local->queue_stop_reasons[queue]);
299 if (local->queue_stop_reasons[queue] != 0)
300 /* someone still has this queue stopped */
303 if (skb_queue_empty(&local->pending[queue])) {
305 ieee80211_propagate_queue_wake(local, queue);
308 tasklet_schedule(&local->tx_pending_tasklet);
311 void ieee80211_wake_queue_by_reason(struct ieee80211_hw *hw, int queue,
312 enum queue_stop_reason reason,
315 struct ieee80211_local *local = hw_to_local(hw);
318 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
319 __ieee80211_wake_queue(hw, queue, reason, refcounted);
320 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
323 void ieee80211_wake_queue(struct ieee80211_hw *hw, int queue)
325 ieee80211_wake_queue_by_reason(hw, queue,
326 IEEE80211_QUEUE_STOP_REASON_DRIVER,
329 EXPORT_SYMBOL(ieee80211_wake_queue);
331 static void __ieee80211_stop_queue(struct ieee80211_hw *hw, int queue,
332 enum queue_stop_reason reason,
335 struct ieee80211_local *local = hw_to_local(hw);
336 struct ieee80211_sub_if_data *sdata;
337 int n_acs = IEEE80211_NUM_ACS;
339 trace_stop_queue(local, queue, reason);
341 if (WARN_ON(queue >= hw->queues))
345 local->q_stop_reasons[queue][reason] = 1;
347 local->q_stop_reasons[queue][reason]++;
349 if (__test_and_set_bit(reason, &local->queue_stop_reasons[queue]))
352 if (local->hw.queues < IEEE80211_NUM_ACS)
356 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
362 for (ac = 0; ac < n_acs; ac++) {
363 if (sdata->vif.hw_queue[ac] == queue ||
364 sdata->vif.cab_queue == queue)
365 netif_stop_subqueue(sdata->dev, ac);
371 void ieee80211_stop_queue_by_reason(struct ieee80211_hw *hw, int queue,
372 enum queue_stop_reason reason,
375 struct ieee80211_local *local = hw_to_local(hw);
378 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
379 __ieee80211_stop_queue(hw, queue, reason, refcounted);
380 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
383 void ieee80211_stop_queue(struct ieee80211_hw *hw, int queue)
385 ieee80211_stop_queue_by_reason(hw, queue,
386 IEEE80211_QUEUE_STOP_REASON_DRIVER,
389 EXPORT_SYMBOL(ieee80211_stop_queue);
391 void ieee80211_add_pending_skb(struct ieee80211_local *local,
394 struct ieee80211_hw *hw = &local->hw;
396 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
397 int queue = info->hw_queue;
399 if (WARN_ON(!info->control.vif)) {
400 ieee80211_free_txskb(&local->hw, skb);
404 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
405 __ieee80211_stop_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
407 __skb_queue_tail(&local->pending[queue], skb);
408 __ieee80211_wake_queue(hw, queue, IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
410 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
413 void ieee80211_add_pending_skbs(struct ieee80211_local *local,
414 struct sk_buff_head *skbs)
416 struct ieee80211_hw *hw = &local->hw;
421 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
422 while ((skb = skb_dequeue(skbs))) {
423 struct ieee80211_tx_info *info = IEEE80211_SKB_CB(skb);
425 if (WARN_ON(!info->control.vif)) {
426 ieee80211_free_txskb(&local->hw, skb);
430 queue = info->hw_queue;
432 __ieee80211_stop_queue(hw, queue,
433 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
436 __skb_queue_tail(&local->pending[queue], skb);
439 for (i = 0; i < hw->queues; i++)
440 __ieee80211_wake_queue(hw, i,
441 IEEE80211_QUEUE_STOP_REASON_SKB_ADD,
443 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
446 void ieee80211_stop_queues_by_reason(struct ieee80211_hw *hw,
447 unsigned long queues,
448 enum queue_stop_reason reason,
451 struct ieee80211_local *local = hw_to_local(hw);
455 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
457 for_each_set_bit(i, &queues, hw->queues)
458 __ieee80211_stop_queue(hw, i, reason, refcounted);
460 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
463 void ieee80211_stop_queues(struct ieee80211_hw *hw)
465 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
466 IEEE80211_QUEUE_STOP_REASON_DRIVER,
469 EXPORT_SYMBOL(ieee80211_stop_queues);
471 int ieee80211_queue_stopped(struct ieee80211_hw *hw, int queue)
473 struct ieee80211_local *local = hw_to_local(hw);
477 if (WARN_ON(queue >= hw->queues))
480 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
481 ret = test_bit(IEEE80211_QUEUE_STOP_REASON_DRIVER,
482 &local->queue_stop_reasons[queue]);
483 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
486 EXPORT_SYMBOL(ieee80211_queue_stopped);
488 void ieee80211_wake_queues_by_reason(struct ieee80211_hw *hw,
489 unsigned long queues,
490 enum queue_stop_reason reason,
493 struct ieee80211_local *local = hw_to_local(hw);
497 spin_lock_irqsave(&local->queue_stop_reason_lock, flags);
499 for_each_set_bit(i, &queues, hw->queues)
500 __ieee80211_wake_queue(hw, i, reason, refcounted);
502 spin_unlock_irqrestore(&local->queue_stop_reason_lock, flags);
505 void ieee80211_wake_queues(struct ieee80211_hw *hw)
507 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
508 IEEE80211_QUEUE_STOP_REASON_DRIVER,
511 EXPORT_SYMBOL(ieee80211_wake_queues);
514 ieee80211_get_vif_queues(struct ieee80211_local *local,
515 struct ieee80211_sub_if_data *sdata)
519 if (sdata && ieee80211_hw_check(&local->hw, QUEUE_CONTROL)) {
524 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++)
525 queues |= BIT(sdata->vif.hw_queue[ac]);
526 if (sdata->vif.cab_queue != IEEE80211_INVAL_HW_QUEUE)
527 queues |= BIT(sdata->vif.cab_queue);
530 queues = BIT(local->hw.queues) - 1;
536 void __ieee80211_flush_queues(struct ieee80211_local *local,
537 struct ieee80211_sub_if_data *sdata,
538 unsigned int queues, bool drop)
540 if (!local->ops->flush)
544 * If no queue was set, or if the HW doesn't support
545 * IEEE80211_HW_QUEUE_CONTROL - flush all queues
547 if (!queues || !ieee80211_hw_check(&local->hw, QUEUE_CONTROL))
548 queues = ieee80211_get_vif_queues(local, sdata);
550 ieee80211_stop_queues_by_reason(&local->hw, queues,
551 IEEE80211_QUEUE_STOP_REASON_FLUSH,
554 drv_flush(local, sdata, queues, drop);
556 ieee80211_wake_queues_by_reason(&local->hw, queues,
557 IEEE80211_QUEUE_STOP_REASON_FLUSH,
561 void ieee80211_flush_queues(struct ieee80211_local *local,
562 struct ieee80211_sub_if_data *sdata, bool drop)
564 __ieee80211_flush_queues(local, sdata, 0, drop);
567 void ieee80211_stop_vif_queues(struct ieee80211_local *local,
568 struct ieee80211_sub_if_data *sdata,
569 enum queue_stop_reason reason)
571 ieee80211_stop_queues_by_reason(&local->hw,
572 ieee80211_get_vif_queues(local, sdata),
576 void ieee80211_wake_vif_queues(struct ieee80211_local *local,
577 struct ieee80211_sub_if_data *sdata,
578 enum queue_stop_reason reason)
580 ieee80211_wake_queues_by_reason(&local->hw,
581 ieee80211_get_vif_queues(local, sdata),
585 static void __iterate_interfaces(struct ieee80211_local *local,
587 void (*iterator)(void *data, u8 *mac,
588 struct ieee80211_vif *vif),
591 struct ieee80211_sub_if_data *sdata;
592 bool active_only = iter_flags & IEEE80211_IFACE_ITER_ACTIVE;
594 list_for_each_entry_rcu(sdata, &local->interfaces, list) {
595 switch (sdata->vif.type) {
596 case NL80211_IFTYPE_MONITOR:
597 if (!(sdata->u.mntr_flags & MONITOR_FLAG_ACTIVE))
600 case NL80211_IFTYPE_AP_VLAN:
605 if (!(iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL) &&
606 active_only && !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
608 if (ieee80211_sdata_running(sdata) || !active_only)
609 iterator(data, sdata->vif.addr,
613 sdata = rcu_dereference_check(local->monitor_sdata,
614 lockdep_is_held(&local->iflist_mtx) ||
615 lockdep_rtnl_is_held());
617 (iter_flags & IEEE80211_IFACE_ITER_RESUME_ALL || !active_only ||
618 sdata->flags & IEEE80211_SDATA_IN_DRIVER))
619 iterator(data, sdata->vif.addr, &sdata->vif);
622 void ieee80211_iterate_interfaces(
623 struct ieee80211_hw *hw, u32 iter_flags,
624 void (*iterator)(void *data, u8 *mac,
625 struct ieee80211_vif *vif),
628 struct ieee80211_local *local = hw_to_local(hw);
630 mutex_lock(&local->iflist_mtx);
631 __iterate_interfaces(local, iter_flags, iterator, data);
632 mutex_unlock(&local->iflist_mtx);
634 EXPORT_SYMBOL_GPL(ieee80211_iterate_interfaces);
636 void ieee80211_iterate_active_interfaces_atomic(
637 struct ieee80211_hw *hw, u32 iter_flags,
638 void (*iterator)(void *data, u8 *mac,
639 struct ieee80211_vif *vif),
642 struct ieee80211_local *local = hw_to_local(hw);
645 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
649 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_atomic);
651 void ieee80211_iterate_active_interfaces_rtnl(
652 struct ieee80211_hw *hw, u32 iter_flags,
653 void (*iterator)(void *data, u8 *mac,
654 struct ieee80211_vif *vif),
657 struct ieee80211_local *local = hw_to_local(hw);
661 __iterate_interfaces(local, iter_flags | IEEE80211_IFACE_ITER_ACTIVE,
664 EXPORT_SYMBOL_GPL(ieee80211_iterate_active_interfaces_rtnl);
666 static void __iterate_stations(struct ieee80211_local *local,
667 void (*iterator)(void *data,
668 struct ieee80211_sta *sta),
671 struct sta_info *sta;
673 list_for_each_entry_rcu(sta, &local->sta_list, list) {
677 iterator(data, &sta->sta);
681 void ieee80211_iterate_stations_atomic(struct ieee80211_hw *hw,
682 void (*iterator)(void *data,
683 struct ieee80211_sta *sta),
686 struct ieee80211_local *local = hw_to_local(hw);
689 __iterate_stations(local, iterator, data);
692 EXPORT_SYMBOL_GPL(ieee80211_iterate_stations_atomic);
694 struct ieee80211_vif *wdev_to_ieee80211_vif(struct wireless_dev *wdev)
696 struct ieee80211_sub_if_data *sdata = IEEE80211_WDEV_TO_SUB_IF(wdev);
698 if (!ieee80211_sdata_running(sdata) ||
699 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
703 EXPORT_SYMBOL_GPL(wdev_to_ieee80211_vif);
705 struct wireless_dev *ieee80211_vif_to_wdev(struct ieee80211_vif *vif)
707 struct ieee80211_sub_if_data *sdata;
712 sdata = vif_to_sdata(vif);
714 if (!ieee80211_sdata_running(sdata) ||
715 !(sdata->flags & IEEE80211_SDATA_IN_DRIVER))
720 EXPORT_SYMBOL_GPL(ieee80211_vif_to_wdev);
723 * Nothing should have been stuffed into the workqueue during
724 * the suspend->resume cycle. Since we can't check each caller
725 * of this function if we are already quiescing / suspended,
726 * check here and don't WARN since this can actually happen when
727 * the rx path (for example) is racing against __ieee80211_suspend
728 * and suspending / quiescing was set after the rx path checked
731 static bool ieee80211_can_queue_work(struct ieee80211_local *local)
733 if (local->quiescing || (local->suspended && !local->resuming)) {
734 pr_warn("queueing ieee80211 work while going to suspend\n");
741 void ieee80211_queue_work(struct ieee80211_hw *hw, struct work_struct *work)
743 struct ieee80211_local *local = hw_to_local(hw);
745 if (!ieee80211_can_queue_work(local))
748 queue_work(local->workqueue, work);
750 EXPORT_SYMBOL(ieee80211_queue_work);
752 void ieee80211_queue_delayed_work(struct ieee80211_hw *hw,
753 struct delayed_work *dwork,
756 struct ieee80211_local *local = hw_to_local(hw);
758 if (!ieee80211_can_queue_work(local))
761 queue_delayed_work(local->workqueue, dwork, delay);
763 EXPORT_SYMBOL(ieee80211_queue_delayed_work);
765 u32 ieee802_11_parse_elems_crc(const u8 *start, size_t len, bool action,
766 struct ieee802_11_elems *elems,
770 const u8 *pos = start;
771 bool calc_crc = filter != 0;
772 DECLARE_BITMAP(seen_elems, 256);
775 bitmap_zero(seen_elems, 256);
776 memset(elems, 0, sizeof(*elems));
777 elems->ie_start = start;
778 elems->total_len = len;
782 bool elem_parse_failed;
789 elems->parse_error = true;
795 case WLAN_EID_SUPP_RATES:
796 case WLAN_EID_FH_PARAMS:
797 case WLAN_EID_DS_PARAMS:
798 case WLAN_EID_CF_PARAMS:
800 case WLAN_EID_IBSS_PARAMS:
801 case WLAN_EID_CHALLENGE:
803 case WLAN_EID_ERP_INFO:
804 case WLAN_EID_EXT_SUPP_RATES:
805 case WLAN_EID_HT_CAPABILITY:
806 case WLAN_EID_HT_OPERATION:
807 case WLAN_EID_VHT_CAPABILITY:
808 case WLAN_EID_VHT_OPERATION:
809 case WLAN_EID_MESH_ID:
810 case WLAN_EID_MESH_CONFIG:
811 case WLAN_EID_PEER_MGMT:
816 case WLAN_EID_CHANNEL_SWITCH:
817 case WLAN_EID_EXT_CHANSWITCH_ANN:
818 case WLAN_EID_COUNTRY:
819 case WLAN_EID_PWR_CONSTRAINT:
820 case WLAN_EID_TIMEOUT_INTERVAL:
821 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
822 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
823 case WLAN_EID_CHAN_SWITCH_PARAM:
824 case WLAN_EID_EXT_CAPABILITY:
825 case WLAN_EID_CHAN_SWITCH_TIMING:
826 case WLAN_EID_LINK_ID:
828 * not listing WLAN_EID_CHANNEL_SWITCH_WRAPPER -- it seems possible
829 * that if the content gets bigger it might be needed more than once
831 if (test_bit(id, seen_elems)) {
832 elems->parse_error = true;
840 if (calc_crc && id < 64 && (filter & (1ULL << id)))
841 crc = crc32_be(crc, pos - 2, elen + 2);
843 elem_parse_failed = false;
846 case WLAN_EID_LINK_ID:
847 if (elen + 2 != sizeof(struct ieee80211_tdls_lnkie)) {
848 elem_parse_failed = true;
851 elems->lnk_id = (void *)(pos - 2);
853 case WLAN_EID_CHAN_SWITCH_TIMING:
854 if (elen != sizeof(struct ieee80211_ch_switch_timing)) {
855 elem_parse_failed = true;
858 elems->ch_sw_timing = (void *)pos;
860 case WLAN_EID_EXT_CAPABILITY:
861 elems->ext_capab = pos;
862 elems->ext_capab_len = elen;
866 elems->ssid_len = elen;
868 case WLAN_EID_SUPP_RATES:
869 elems->supp_rates = pos;
870 elems->supp_rates_len = elen;
872 case WLAN_EID_DS_PARAMS:
874 elems->ds_params = pos;
876 elem_parse_failed = true;
879 if (elen >= sizeof(struct ieee80211_tim_ie)) {
880 elems->tim = (void *)pos;
881 elems->tim_len = elen;
883 elem_parse_failed = true;
885 case WLAN_EID_CHALLENGE:
886 elems->challenge = pos;
887 elems->challenge_len = elen;
889 case WLAN_EID_VENDOR_SPECIFIC:
890 if (elen >= 4 && pos[0] == 0x00 && pos[1] == 0x50 &&
892 /* Microsoft OUI (00:50:F2) */
895 crc = crc32_be(crc, pos - 2, elen + 2);
897 if (elen >= 5 && pos[3] == 2) {
898 /* OUI Type 2 - WMM IE */
900 elems->wmm_info = pos;
901 elems->wmm_info_len = elen;
902 } else if (pos[4] == 1) {
903 elems->wmm_param = pos;
904 elems->wmm_param_len = elen;
911 elems->rsn_len = elen;
913 case WLAN_EID_ERP_INFO:
915 elems->erp_info = pos;
917 elem_parse_failed = true;
919 case WLAN_EID_EXT_SUPP_RATES:
920 elems->ext_supp_rates = pos;
921 elems->ext_supp_rates_len = elen;
923 case WLAN_EID_HT_CAPABILITY:
924 if (elen >= sizeof(struct ieee80211_ht_cap))
925 elems->ht_cap_elem = (void *)pos;
927 elem_parse_failed = true;
929 case WLAN_EID_HT_OPERATION:
930 if (elen >= sizeof(struct ieee80211_ht_operation))
931 elems->ht_operation = (void *)pos;
933 elem_parse_failed = true;
935 case WLAN_EID_VHT_CAPABILITY:
936 if (elen >= sizeof(struct ieee80211_vht_cap))
937 elems->vht_cap_elem = (void *)pos;
939 elem_parse_failed = true;
941 case WLAN_EID_VHT_OPERATION:
942 if (elen >= sizeof(struct ieee80211_vht_operation))
943 elems->vht_operation = (void *)pos;
945 elem_parse_failed = true;
947 case WLAN_EID_OPMODE_NOTIF:
949 elems->opmode_notif = pos;
951 elem_parse_failed = true;
953 case WLAN_EID_MESH_ID:
954 elems->mesh_id = pos;
955 elems->mesh_id_len = elen;
957 case WLAN_EID_MESH_CONFIG:
958 if (elen >= sizeof(struct ieee80211_meshconf_ie))
959 elems->mesh_config = (void *)pos;
961 elem_parse_failed = true;
963 case WLAN_EID_PEER_MGMT:
964 elems->peering = pos;
965 elems->peering_len = elen;
967 case WLAN_EID_MESH_AWAKE_WINDOW:
969 elems->awake_window = (void *)pos;
973 elems->preq_len = elen;
977 elems->prep_len = elen;
981 elems->perr_len = elen;
984 if (elen >= sizeof(struct ieee80211_rann_ie))
985 elems->rann = (void *)pos;
987 elem_parse_failed = true;
989 case WLAN_EID_CHANNEL_SWITCH:
990 if (elen != sizeof(struct ieee80211_channel_sw_ie)) {
991 elem_parse_failed = true;
994 elems->ch_switch_ie = (void *)pos;
996 case WLAN_EID_EXT_CHANSWITCH_ANN:
997 if (elen != sizeof(struct ieee80211_ext_chansw_ie)) {
998 elem_parse_failed = true;
1001 elems->ext_chansw_ie = (void *)pos;
1003 case WLAN_EID_SECONDARY_CHANNEL_OFFSET:
1004 if (elen != sizeof(struct ieee80211_sec_chan_offs_ie)) {
1005 elem_parse_failed = true;
1008 elems->sec_chan_offs = (void *)pos;
1010 case WLAN_EID_CHAN_SWITCH_PARAM:
1012 sizeof(*elems->mesh_chansw_params_ie)) {
1013 elem_parse_failed = true;
1016 elems->mesh_chansw_params_ie = (void *)pos;
1018 case WLAN_EID_WIDE_BW_CHANNEL_SWITCH:
1020 elen != sizeof(*elems->wide_bw_chansw_ie)) {
1021 elem_parse_failed = true;
1024 elems->wide_bw_chansw_ie = (void *)pos;
1026 case WLAN_EID_CHANNEL_SWITCH_WRAPPER:
1028 elem_parse_failed = true;
1032 * This is a bit tricky, but as we only care about
1033 * the wide bandwidth channel switch element, so
1034 * just parse it out manually.
1036 ie = cfg80211_find_ie(WLAN_EID_WIDE_BW_CHANNEL_SWITCH,
1039 if (ie[1] == sizeof(*elems->wide_bw_chansw_ie))
1040 elems->wide_bw_chansw_ie =
1043 elem_parse_failed = true;
1046 case WLAN_EID_COUNTRY:
1047 elems->country_elem = pos;
1048 elems->country_elem_len = elen;
1050 case WLAN_EID_PWR_CONSTRAINT:
1052 elem_parse_failed = true;
1055 elems->pwr_constr_elem = pos;
1057 case WLAN_EID_CISCO_VENDOR_SPECIFIC:
1058 /* Lots of different options exist, but we only care
1059 * about the Dynamic Transmit Power Control element.
1060 * First check for the Cisco OUI, then for the DTPC
1064 elem_parse_failed = true;
1068 if (pos[0] != 0x00 || pos[1] != 0x40 ||
1069 pos[2] != 0x96 || pos[3] != 0x00)
1073 elem_parse_failed = true;
1078 crc = crc32_be(crc, pos - 2, elen + 2);
1080 elems->cisco_dtpc_elem = pos;
1082 case WLAN_EID_TIMEOUT_INTERVAL:
1083 if (elen >= sizeof(struct ieee80211_timeout_interval_ie))
1084 elems->timeout_int = (void *)pos;
1086 elem_parse_failed = true;
1092 if (elem_parse_failed)
1093 elems->parse_error = true;
1095 __set_bit(id, seen_elems);
1102 elems->parse_error = true;
1107 void ieee80211_set_wmm_default(struct ieee80211_sub_if_data *sdata,
1110 struct ieee80211_local *local = sdata->local;
1111 struct ieee80211_tx_queue_params qparam;
1112 struct ieee80211_chanctx_conf *chanctx_conf;
1114 bool use_11b, enable_qos;
1115 bool is_ocb; /* Use another EDCA parameters if dot11OCBActivated=true */
1118 if (!local->ops->conf_tx)
1121 if (local->hw.queues < IEEE80211_NUM_ACS)
1124 memset(&qparam, 0, sizeof(qparam));
1127 chanctx_conf = rcu_dereference(sdata->vif.chanctx_conf);
1128 use_11b = (chanctx_conf &&
1129 chanctx_conf->def.chan->band == IEEE80211_BAND_2GHZ) &&
1130 !(sdata->flags & IEEE80211_SDATA_OPERATING_GMODE);
1134 * By default disable QoS in STA mode for old access points, which do
1135 * not support 802.11e. New APs will provide proper queue parameters,
1136 * that we will configure later.
1138 enable_qos = (sdata->vif.type != NL80211_IFTYPE_STATION);
1140 is_ocb = (sdata->vif.type == NL80211_IFTYPE_OCB);
1142 /* Set defaults according to 802.11-2007 Table 7-37 */
1149 /* Confiure old 802.11b/g medium access rules. */
1150 qparam.cw_max = aCWmax;
1151 qparam.cw_min = aCWmin;
1155 for (ac = 0; ac < IEEE80211_NUM_ACS; ac++) {
1156 /* Update if QoS is enabled. */
1159 case IEEE80211_AC_BK:
1160 qparam.cw_max = aCWmax;
1161 qparam.cw_min = aCWmin;
1168 /* never happens but let's not leave undefined */
1170 case IEEE80211_AC_BE:
1171 qparam.cw_max = aCWmax;
1172 qparam.cw_min = aCWmin;
1179 case IEEE80211_AC_VI:
1180 qparam.cw_max = aCWmin;
1181 qparam.cw_min = (aCWmin + 1) / 2 - 1;
1185 qparam.txop = 6016/32;
1187 qparam.txop = 3008/32;
1194 case IEEE80211_AC_VO:
1195 qparam.cw_max = (aCWmin + 1) / 2 - 1;
1196 qparam.cw_min = (aCWmin + 1) / 4 - 1;
1200 qparam.txop = 3264/32;
1202 qparam.txop = 1504/32;
1208 qparam.uapsd = false;
1210 sdata->tx_conf[ac] = qparam;
1211 drv_conf_tx(local, sdata, ac, &qparam);
1214 if (sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1215 sdata->vif.type != NL80211_IFTYPE_P2P_DEVICE) {
1216 sdata->vif.bss_conf.qos = enable_qos;
1218 ieee80211_bss_info_change_notify(sdata,
1223 void ieee80211_send_auth(struct ieee80211_sub_if_data *sdata,
1224 u16 transaction, u16 auth_alg, u16 status,
1225 const u8 *extra, size_t extra_len, const u8 *da,
1226 const u8 *bssid, const u8 *key, u8 key_len, u8 key_idx,
1229 struct ieee80211_local *local = sdata->local;
1230 struct sk_buff *skb;
1231 struct ieee80211_mgmt *mgmt;
1234 /* 24 + 6 = header + auth_algo + auth_transaction + status_code */
1235 skb = dev_alloc_skb(local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN +
1236 24 + 6 + extra_len + IEEE80211_WEP_ICV_LEN);
1240 skb_reserve(skb, local->hw.extra_tx_headroom + IEEE80211_WEP_IV_LEN);
1242 mgmt = (struct ieee80211_mgmt *) skb_put(skb, 24 + 6);
1243 memset(mgmt, 0, 24 + 6);
1244 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
1245 IEEE80211_STYPE_AUTH);
1246 memcpy(mgmt->da, da, ETH_ALEN);
1247 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1248 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1249 mgmt->u.auth.auth_alg = cpu_to_le16(auth_alg);
1250 mgmt->u.auth.auth_transaction = cpu_to_le16(transaction);
1251 mgmt->u.auth.status_code = cpu_to_le16(status);
1253 memcpy(skb_put(skb, extra_len), extra, extra_len);
1255 if (auth_alg == WLAN_AUTH_SHARED_KEY && transaction == 3) {
1256 mgmt->frame_control |= cpu_to_le16(IEEE80211_FCTL_PROTECTED);
1257 err = ieee80211_wep_encrypt(local, skb, key, key_len, key_idx);
1261 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT |
1263 ieee80211_tx_skb(sdata, skb);
1266 void ieee80211_send_deauth_disassoc(struct ieee80211_sub_if_data *sdata,
1267 const u8 *bssid, u16 stype, u16 reason,
1268 bool send_frame, u8 *frame_buf)
1270 struct ieee80211_local *local = sdata->local;
1271 struct sk_buff *skb;
1272 struct ieee80211_mgmt *mgmt = (void *)frame_buf;
1275 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT | stype);
1276 mgmt->duration = 0; /* initialize only */
1277 mgmt->seq_ctrl = 0; /* initialize only */
1278 memcpy(mgmt->da, bssid, ETH_ALEN);
1279 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
1280 memcpy(mgmt->bssid, bssid, ETH_ALEN);
1281 /* u.deauth.reason_code == u.disassoc.reason_code */
1282 mgmt->u.deauth.reason_code = cpu_to_le16(reason);
1285 skb = dev_alloc_skb(local->hw.extra_tx_headroom +
1286 IEEE80211_DEAUTH_FRAME_LEN);
1290 skb_reserve(skb, local->hw.extra_tx_headroom);
1293 memcpy(skb_put(skb, IEEE80211_DEAUTH_FRAME_LEN),
1294 mgmt, IEEE80211_DEAUTH_FRAME_LEN);
1296 if (sdata->vif.type != NL80211_IFTYPE_STATION ||
1297 !(sdata->u.mgd.flags & IEEE80211_STA_MFP_ENABLED))
1298 IEEE80211_SKB_CB(skb)->flags |=
1299 IEEE80211_TX_INTFL_DONT_ENCRYPT;
1301 ieee80211_tx_skb(sdata, skb);
1305 static int ieee80211_build_preq_ies_band(struct ieee80211_local *local,
1306 u8 *buffer, size_t buffer_len,
1307 const u8 *ie, size_t ie_len,
1308 enum ieee80211_band band,
1310 struct cfg80211_chan_def *chandef,
1313 struct ieee80211_supported_band *sband;
1314 u8 *pos = buffer, *end = buffer + buffer_len;
1316 int supp_rates_len, i;
1322 bool have_80mhz = false;
1326 sband = local->hw.wiphy->bands[band];
1327 if (WARN_ON_ONCE(!sband))
1330 rate_flags = ieee80211_chandef_rate_flags(chandef);
1331 shift = ieee80211_chandef_get_shift(chandef);
1334 for (i = 0; i < sband->n_bitrates; i++) {
1335 if ((BIT(i) & rate_mask) == 0)
1336 continue; /* skip rate */
1337 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
1340 rates[num_rates++] =
1341 (u8) DIV_ROUND_UP(sband->bitrates[i].bitrate,
1345 supp_rates_len = min_t(int, num_rates, 8);
1347 if (end - pos < 2 + supp_rates_len)
1349 *pos++ = WLAN_EID_SUPP_RATES;
1350 *pos++ = supp_rates_len;
1351 memcpy(pos, rates, supp_rates_len);
1352 pos += supp_rates_len;
1354 /* insert "request information" if in custom IEs */
1356 static const u8 before_extrates[] = {
1358 WLAN_EID_SUPP_RATES,
1361 noffset = ieee80211_ie_split(ie, ie_len,
1363 ARRAY_SIZE(before_extrates),
1365 if (end - pos < noffset - *offset)
1367 memcpy(pos, ie + *offset, noffset - *offset);
1368 pos += noffset - *offset;
1372 ext_rates_len = num_rates - supp_rates_len;
1373 if (ext_rates_len > 0) {
1374 if (end - pos < 2 + ext_rates_len)
1376 *pos++ = WLAN_EID_EXT_SUPP_RATES;
1377 *pos++ = ext_rates_len;
1378 memcpy(pos, rates + supp_rates_len, ext_rates_len);
1379 pos += ext_rates_len;
1382 if (chandef->chan && sband->band == IEEE80211_BAND_2GHZ) {
1385 *pos++ = WLAN_EID_DS_PARAMS;
1387 *pos++ = ieee80211_frequency_to_channel(
1388 chandef->chan->center_freq);
1391 /* insert custom IEs that go before HT */
1393 static const u8 before_ht[] = {
1395 WLAN_EID_SUPP_RATES,
1397 WLAN_EID_EXT_SUPP_RATES,
1399 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1401 noffset = ieee80211_ie_split(ie, ie_len,
1402 before_ht, ARRAY_SIZE(before_ht),
1404 if (end - pos < noffset - *offset)
1406 memcpy(pos, ie + *offset, noffset - *offset);
1407 pos += noffset - *offset;
1411 if (sband->ht_cap.ht_supported) {
1412 if (end - pos < 2 + sizeof(struct ieee80211_ht_cap))
1414 pos = ieee80211_ie_build_ht_cap(pos, &sband->ht_cap,
1419 * If adding more here, adjust code in main.c
1420 * that calculates local->scan_ies_len.
1423 /* insert custom IEs that go before VHT */
1425 static const u8 before_vht[] = {
1427 WLAN_EID_SUPP_RATES,
1429 WLAN_EID_EXT_SUPP_RATES,
1431 WLAN_EID_SUPPORTED_REGULATORY_CLASSES,
1432 WLAN_EID_HT_CAPABILITY,
1433 WLAN_EID_BSS_COEX_2040,
1434 WLAN_EID_EXT_CAPABILITY,
1436 WLAN_EID_CHANNEL_USAGE,
1437 WLAN_EID_INTERWORKING,
1438 /* mesh ID can't happen here */
1439 /* 60 GHz can't happen here right now */
1441 noffset = ieee80211_ie_split(ie, ie_len,
1442 before_vht, ARRAY_SIZE(before_vht),
1444 if (end - pos < noffset - *offset)
1446 memcpy(pos, ie + *offset, noffset - *offset);
1447 pos += noffset - *offset;
1451 /* Check if any channel in this sband supports at least 80 MHz */
1452 for (i = 0; i < sband->n_channels; i++) {
1453 if (sband->channels[i].flags & (IEEE80211_CHAN_DISABLED |
1454 IEEE80211_CHAN_NO_80MHZ))
1461 if (sband->vht_cap.vht_supported && have_80mhz) {
1462 if (end - pos < 2 + sizeof(struct ieee80211_vht_cap))
1464 pos = ieee80211_ie_build_vht_cap(pos, &sband->vht_cap,
1465 sband->vht_cap.cap);
1468 return pos - buffer;
1470 WARN_ONCE(1, "not enough space for preq IEs\n");
1471 return pos - buffer;
1474 int ieee80211_build_preq_ies(struct ieee80211_local *local, u8 *buffer,
1476 struct ieee80211_scan_ies *ie_desc,
1477 const u8 *ie, size_t ie_len,
1478 u8 bands_used, u32 *rate_masks,
1479 struct cfg80211_chan_def *chandef)
1481 size_t pos = 0, old_pos = 0, custom_ie_offset = 0;
1484 memset(ie_desc, 0, sizeof(*ie_desc));
1486 for (i = 0; i < IEEE80211_NUM_BANDS; i++) {
1487 if (bands_used & BIT(i)) {
1488 pos += ieee80211_build_preq_ies_band(local,
1495 ie_desc->ies[i] = buffer + old_pos;
1496 ie_desc->len[i] = pos - old_pos;
1501 /* add any remaining custom IEs */
1503 if (WARN_ONCE(buffer_len - pos < ie_len - custom_ie_offset,
1504 "not enough space for preq custom IEs\n"))
1506 memcpy(buffer + pos, ie + custom_ie_offset,
1507 ie_len - custom_ie_offset);
1508 ie_desc->common_ies = buffer + pos;
1509 ie_desc->common_ie_len = ie_len - custom_ie_offset;
1510 pos += ie_len - custom_ie_offset;
1516 struct sk_buff *ieee80211_build_probe_req(struct ieee80211_sub_if_data *sdata,
1517 const u8 *src, const u8 *dst,
1519 struct ieee80211_channel *chan,
1520 const u8 *ssid, size_t ssid_len,
1521 const u8 *ie, size_t ie_len,
1524 struct ieee80211_local *local = sdata->local;
1525 struct cfg80211_chan_def chandef;
1526 struct sk_buff *skb;
1527 struct ieee80211_mgmt *mgmt;
1529 u32 rate_masks[IEEE80211_NUM_BANDS] = {};
1530 struct ieee80211_scan_ies dummy_ie_desc;
1533 * Do not send DS Channel parameter for directed probe requests
1534 * in order to maximize the chance that we get a response. Some
1535 * badly-behaved APs don't respond when this parameter is included.
1537 chandef.width = sdata->vif.bss_conf.chandef.width;
1539 chandef.chan = NULL;
1541 chandef.chan = chan;
1543 skb = ieee80211_probereq_get(&local->hw, src, ssid, ssid_len,
1548 rate_masks[chan->band] = ratemask;
1549 ies_len = ieee80211_build_preq_ies(local, skb_tail_pointer(skb),
1550 skb_tailroom(skb), &dummy_ie_desc,
1551 ie, ie_len, BIT(chan->band),
1552 rate_masks, &chandef);
1553 skb_put(skb, ies_len);
1556 mgmt = (struct ieee80211_mgmt *) skb->data;
1557 memcpy(mgmt->da, dst, ETH_ALEN);
1558 memcpy(mgmt->bssid, dst, ETH_ALEN);
1561 IEEE80211_SKB_CB(skb)->flags |= IEEE80211_TX_INTFL_DONT_ENCRYPT;
1566 void ieee80211_send_probe_req(struct ieee80211_sub_if_data *sdata,
1567 const u8 *src, const u8 *dst,
1568 const u8 *ssid, size_t ssid_len,
1569 const u8 *ie, size_t ie_len,
1570 u32 ratemask, bool directed, u32 tx_flags,
1571 struct ieee80211_channel *channel, bool scan)
1573 struct sk_buff *skb;
1575 skb = ieee80211_build_probe_req(sdata, src, dst, ratemask, channel,
1577 ie, ie_len, directed);
1579 IEEE80211_SKB_CB(skb)->flags |= tx_flags;
1581 ieee80211_tx_skb_tid_band(sdata, skb, 7, channel->band);
1583 ieee80211_tx_skb(sdata, skb);
1587 u32 ieee80211_sta_get_rates(struct ieee80211_sub_if_data *sdata,
1588 struct ieee802_11_elems *elems,
1589 enum ieee80211_band band, u32 *basic_rates)
1591 struct ieee80211_supported_band *sband;
1593 u32 supp_rates, rate_flags;
1595 sband = sdata->local->hw.wiphy->bands[band];
1597 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
1598 shift = ieee80211_vif_get_shift(&sdata->vif);
1600 if (WARN_ON(!sband))
1603 num_rates = sband->n_bitrates;
1605 for (i = 0; i < elems->supp_rates_len +
1606 elems->ext_supp_rates_len; i++) {
1610 if (i < elems->supp_rates_len)
1611 rate = elems->supp_rates[i];
1612 else if (elems->ext_supp_rates)
1613 rate = elems->ext_supp_rates
1614 [i - elems->supp_rates_len];
1615 own_rate = 5 * (rate & 0x7f);
1616 is_basic = !!(rate & 0x80);
1618 if (is_basic && (rate & 0x7f) == BSS_MEMBERSHIP_SELECTOR_HT_PHY)
1621 for (j = 0; j < num_rates; j++) {
1623 if ((rate_flags & sband->bitrates[j].flags)
1627 brate = DIV_ROUND_UP(sband->bitrates[j].bitrate,
1630 if (brate == own_rate) {
1631 supp_rates |= BIT(j);
1632 if (basic_rates && is_basic)
1633 *basic_rates |= BIT(j);
1640 void ieee80211_stop_device(struct ieee80211_local *local)
1642 ieee80211_led_radio(local, false);
1643 ieee80211_mod_tpt_led_trig(local, 0, IEEE80211_TPT_LEDTRIG_FL_RADIO);
1645 cancel_work_sync(&local->reconfig_filter);
1647 flush_workqueue(local->workqueue);
1651 static void ieee80211_handle_reconfig_failure(struct ieee80211_local *local)
1653 struct ieee80211_sub_if_data *sdata;
1654 struct ieee80211_chanctx *ctx;
1657 * We get here if during resume the device can't be restarted properly.
1658 * We might also get here if this happens during HW reset, which is a
1659 * slightly different situation and we need to drop all connections in
1662 * Ask cfg80211 to turn off all interfaces, this will result in more
1663 * warnings but at least we'll then get into a clean stopped state.
1666 local->resuming = false;
1667 local->suspended = false;
1668 local->in_reconfig = false;
1670 /* scheduled scan clearly can't be running any more, but tell
1671 * cfg80211 and clear local state
1673 ieee80211_sched_scan_end(local);
1675 list_for_each_entry(sdata, &local->interfaces, list)
1676 sdata->flags &= ~IEEE80211_SDATA_IN_DRIVER;
1678 /* Mark channel contexts as not being in the driver any more to avoid
1679 * removing them from the driver during the shutdown process...
1681 mutex_lock(&local->chanctx_mtx);
1682 list_for_each_entry(ctx, &local->chanctx_list, list)
1683 ctx->driver_present = false;
1684 mutex_unlock(&local->chanctx_mtx);
1686 cfg80211_shutdown_all_interfaces(local->hw.wiphy);
1689 static void ieee80211_assign_chanctx(struct ieee80211_local *local,
1690 struct ieee80211_sub_if_data *sdata)
1692 struct ieee80211_chanctx_conf *conf;
1693 struct ieee80211_chanctx *ctx;
1695 if (!local->use_chanctx)
1698 mutex_lock(&local->chanctx_mtx);
1699 conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
1700 lockdep_is_held(&local->chanctx_mtx));
1702 ctx = container_of(conf, struct ieee80211_chanctx, conf);
1703 drv_assign_vif_chanctx(local, sdata, ctx);
1705 mutex_unlock(&local->chanctx_mtx);
1708 int ieee80211_reconfig(struct ieee80211_local *local)
1710 struct ieee80211_hw *hw = &local->hw;
1711 struct ieee80211_sub_if_data *sdata;
1712 struct ieee80211_chanctx *ctx;
1713 struct sta_info *sta;
1715 bool reconfig_due_to_wowlan = false;
1716 struct ieee80211_sub_if_data *sched_scan_sdata;
1717 struct cfg80211_sched_scan_request *sched_scan_req;
1718 bool sched_scan_stopped = false;
1719 bool suspended = local->suspended;
1721 /* nothing to do if HW shouldn't run */
1722 if (!local->open_count)
1727 local->resuming = true;
1729 if (local->wowlan) {
1731 * In the wowlan case, both mac80211 and the device
1732 * are functional when the resume op is called, so
1733 * clear local->suspended so the device could operate
1734 * normally (e.g. pass rx frames).
1736 local->suspended = false;
1737 res = drv_resume(local);
1738 local->wowlan = false;
1740 local->resuming = false;
1747 * res is 1, which means the driver requested
1748 * to go through a regular reset on wakeup.
1749 * restore local->suspended in this case.
1751 reconfig_due_to_wowlan = true;
1752 local->suspended = true;
1757 * In case of hw_restart during suspend (without wowlan),
1758 * cancel restart work, as we are reconfiguring the device
1760 * Note that restart_work is scheduled on a frozen workqueue,
1761 * so we can't deadlock in this case.
1763 if (suspended && local->in_reconfig && !reconfig_due_to_wowlan)
1764 cancel_work_sync(&local->restart_work);
1766 local->started = false;
1769 * Upon resume hardware can sometimes be goofy due to
1770 * various platform / driver / bus issues, so restarting
1771 * the device may at times not work immediately. Propagate
1774 res = drv_start(local);
1777 WARN(1, "Hardware became unavailable upon resume. This could be a software issue prior to suspend or a hardware issue.\n");
1779 WARN(1, "Hardware became unavailable during restart.\n");
1780 ieee80211_handle_reconfig_failure(local);
1784 /* setup fragmentation threshold */
1785 drv_set_frag_threshold(local, hw->wiphy->frag_threshold);
1787 /* setup RTS threshold */
1788 drv_set_rts_threshold(local, hw->wiphy->rts_threshold);
1790 /* reset coverage class */
1791 drv_set_coverage_class(local, hw->wiphy->coverage_class);
1793 ieee80211_led_radio(local, true);
1794 ieee80211_mod_tpt_led_trig(local,
1795 IEEE80211_TPT_LEDTRIG_FL_RADIO, 0);
1797 /* add interfaces */
1798 sdata = rtnl_dereference(local->monitor_sdata);
1800 /* in HW restart it exists already */
1801 WARN_ON(local->resuming);
1802 res = drv_add_interface(local, sdata);
1804 RCU_INIT_POINTER(local->monitor_sdata, NULL);
1810 list_for_each_entry(sdata, &local->interfaces, list) {
1811 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1812 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1813 ieee80211_sdata_running(sdata)) {
1814 res = drv_add_interface(local, sdata);
1820 /* If adding any of the interfaces failed above, roll back and
1824 list_for_each_entry_continue_reverse(sdata, &local->interfaces,
1826 if (sdata->vif.type != NL80211_IFTYPE_AP_VLAN &&
1827 sdata->vif.type != NL80211_IFTYPE_MONITOR &&
1828 ieee80211_sdata_running(sdata))
1829 drv_remove_interface(local, sdata);
1830 ieee80211_handle_reconfig_failure(local);
1834 /* add channel contexts */
1835 if (local->use_chanctx) {
1836 mutex_lock(&local->chanctx_mtx);
1837 list_for_each_entry(ctx, &local->chanctx_list, list)
1838 if (ctx->replace_state !=
1839 IEEE80211_CHANCTX_REPLACES_OTHER)
1840 WARN_ON(drv_add_chanctx(local, ctx));
1841 mutex_unlock(&local->chanctx_mtx);
1843 list_for_each_entry(sdata, &local->interfaces, list) {
1844 if (!ieee80211_sdata_running(sdata))
1846 ieee80211_assign_chanctx(local, sdata);
1849 sdata = rtnl_dereference(local->monitor_sdata);
1850 if (sdata && ieee80211_sdata_running(sdata))
1851 ieee80211_assign_chanctx(local, sdata);
1855 mutex_lock(&local->sta_mtx);
1856 list_for_each_entry(sta, &local->sta_list, list) {
1857 enum ieee80211_sta_state state;
1862 /* AP-mode stations will be added later */
1863 if (sta->sdata->vif.type == NL80211_IFTYPE_AP)
1866 for (state = IEEE80211_STA_NOTEXIST;
1867 state < sta->sta_state; state++)
1868 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
1871 mutex_unlock(&local->sta_mtx);
1873 /* reconfigure tx conf */
1874 if (hw->queues >= IEEE80211_NUM_ACS) {
1875 list_for_each_entry(sdata, &local->interfaces, list) {
1876 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN ||
1877 sdata->vif.type == NL80211_IFTYPE_MONITOR ||
1878 !ieee80211_sdata_running(sdata))
1881 for (i = 0; i < IEEE80211_NUM_ACS; i++)
1882 drv_conf_tx(local, sdata, i,
1883 &sdata->tx_conf[i]);
1887 /* reconfigure hardware */
1888 ieee80211_hw_config(local, ~0);
1890 ieee80211_configure_filter(local);
1892 /* Finally also reconfigure all the BSS information */
1893 list_for_each_entry(sdata, &local->interfaces, list) {
1896 if (!ieee80211_sdata_running(sdata))
1899 /* common change flags for all interface types */
1900 changed = BSS_CHANGED_ERP_CTS_PROT |
1901 BSS_CHANGED_ERP_PREAMBLE |
1902 BSS_CHANGED_ERP_SLOT |
1904 BSS_CHANGED_BASIC_RATES |
1905 BSS_CHANGED_BEACON_INT |
1910 BSS_CHANGED_TXPOWER;
1912 switch (sdata->vif.type) {
1913 case NL80211_IFTYPE_STATION:
1914 changed |= BSS_CHANGED_ASSOC |
1915 BSS_CHANGED_ARP_FILTER |
1918 /* Re-send beacon info report to the driver */
1919 if (sdata->u.mgd.have_beacon)
1920 changed |= BSS_CHANGED_BEACON_INFO;
1923 ieee80211_bss_info_change_notify(sdata, changed);
1924 sdata_unlock(sdata);
1926 case NL80211_IFTYPE_OCB:
1927 changed |= BSS_CHANGED_OCB;
1928 ieee80211_bss_info_change_notify(sdata, changed);
1930 case NL80211_IFTYPE_ADHOC:
1931 changed |= BSS_CHANGED_IBSS;
1933 case NL80211_IFTYPE_AP:
1934 changed |= BSS_CHANGED_SSID | BSS_CHANGED_P2P_PS;
1936 if (sdata->vif.type == NL80211_IFTYPE_AP) {
1937 changed |= BSS_CHANGED_AP_PROBE_RESP;
1939 if (rcu_access_pointer(sdata->u.ap.beacon))
1940 drv_start_ap(local, sdata);
1944 case NL80211_IFTYPE_MESH_POINT:
1945 if (sdata->vif.bss_conf.enable_beacon) {
1946 changed |= BSS_CHANGED_BEACON |
1947 BSS_CHANGED_BEACON_ENABLED;
1948 ieee80211_bss_info_change_notify(sdata, changed);
1951 case NL80211_IFTYPE_WDS:
1952 case NL80211_IFTYPE_AP_VLAN:
1953 case NL80211_IFTYPE_MONITOR:
1954 case NL80211_IFTYPE_P2P_DEVICE:
1957 case NL80211_IFTYPE_UNSPECIFIED:
1958 case NUM_NL80211_IFTYPES:
1959 case NL80211_IFTYPE_P2P_CLIENT:
1960 case NL80211_IFTYPE_P2P_GO:
1966 ieee80211_recalc_ps(local);
1969 * The sta might be in psm against the ap (e.g. because
1970 * this was the state before a hw restart), so we
1971 * explicitly send a null packet in order to make sure
1972 * it'll sync against the ap (and get out of psm).
1974 if (!(local->hw.conf.flags & IEEE80211_CONF_PS)) {
1975 list_for_each_entry(sdata, &local->interfaces, list) {
1976 if (sdata->vif.type != NL80211_IFTYPE_STATION)
1978 if (!sdata->u.mgd.associated)
1981 ieee80211_send_nullfunc(local, sdata, false);
1985 /* APs are now beaconing, add back stations */
1986 mutex_lock(&local->sta_mtx);
1987 list_for_each_entry(sta, &local->sta_list, list) {
1988 enum ieee80211_sta_state state;
1993 if (sta->sdata->vif.type != NL80211_IFTYPE_AP)
1996 for (state = IEEE80211_STA_NOTEXIST;
1997 state < sta->sta_state; state++)
1998 WARN_ON(drv_sta_state(local, sta->sdata, sta, state,
2001 mutex_unlock(&local->sta_mtx);
2004 list_for_each_entry(sdata, &local->interfaces, list)
2005 ieee80211_reset_crypto_tx_tailroom(sdata);
2007 list_for_each_entry(sdata, &local->interfaces, list)
2008 if (ieee80211_sdata_running(sdata))
2009 ieee80211_enable_keys(sdata);
2011 /* Reconfigure sched scan if it was interrupted by FW restart */
2012 mutex_lock(&local->mtx);
2013 sched_scan_sdata = rcu_dereference_protected(local->sched_scan_sdata,
2014 lockdep_is_held(&local->mtx));
2015 sched_scan_req = rcu_dereference_protected(local->sched_scan_req,
2016 lockdep_is_held(&local->mtx));
2017 if (sched_scan_sdata && sched_scan_req)
2019 * Sched scan stopped, but we don't want to report it. Instead,
2020 * we're trying to reschedule. However, if more than one scan
2021 * plan was set, we cannot reschedule since we don't know which
2022 * scan plan was currently running (and some scan plans may have
2023 * already finished).
2025 if (sched_scan_req->n_scan_plans > 1 ||
2026 __ieee80211_request_sched_scan_start(sched_scan_sdata,
2028 sched_scan_stopped = true;
2029 mutex_unlock(&local->mtx);
2031 if (sched_scan_stopped)
2032 cfg80211_sched_scan_stopped_rtnl(local->hw.wiphy);
2035 local->in_reconfig = false;
2038 if (local->monitors == local->open_count && local->monitors > 0)
2039 ieee80211_add_virtual_monitor(local);
2042 * Clear the WLAN_STA_BLOCK_BA flag so new aggregation
2043 * sessions can be established after a resume.
2045 * Also tear down aggregation sessions since reconfiguring
2046 * them in a hardware restart scenario is not easily done
2047 * right now, and the hardware will have lost information
2048 * about the sessions, but we and the AP still think they
2049 * are active. This is really a workaround though.
2051 if (ieee80211_hw_check(hw, AMPDU_AGGREGATION)) {
2052 mutex_lock(&local->sta_mtx);
2054 list_for_each_entry(sta, &local->sta_list, list) {
2055 if (!local->resuming)
2056 ieee80211_sta_tear_down_BA_sessions(
2057 sta, AGG_STOP_LOCAL_REQUEST);
2058 clear_sta_flag(sta, WLAN_STA_BLOCK_BA);
2061 mutex_unlock(&local->sta_mtx);
2064 ieee80211_wake_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP,
2065 IEEE80211_QUEUE_STOP_REASON_SUSPEND,
2069 * If this is for hw restart things are still running.
2070 * We may want to change that later, however.
2072 if (local->open_count && (!suspended || reconfig_due_to_wowlan))
2073 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_RESTART);
2079 /* first set suspended false, then resuming */
2080 local->suspended = false;
2082 local->resuming = false;
2084 /* It's possible that we don't handle the scan completion in
2085 * time during suspend, so if it's still marked as completed
2086 * here, queue the work and flush it to clean things up.
2087 * Instead of calling the worker function directly here, we
2088 * really queue it to avoid potential races with other flows
2089 * scheduling the same work.
2091 if (test_bit(SCAN_COMPLETED, &local->scanning)) {
2092 ieee80211_queue_delayed_work(&local->hw, &local->scan_work, 0);
2093 flush_delayed_work(&local->scan_work);
2096 if (local->open_count && !reconfig_due_to_wowlan)
2097 drv_reconfig_complete(local, IEEE80211_RECONFIG_TYPE_SUSPEND);
2099 list_for_each_entry(sdata, &local->interfaces, list) {
2100 if (!ieee80211_sdata_running(sdata))
2102 if (sdata->vif.type == NL80211_IFTYPE_STATION)
2103 ieee80211_sta_restart(sdata);
2106 mod_timer(&local->sta_cleanup, jiffies + 1);
2114 void ieee80211_resume_disconnect(struct ieee80211_vif *vif)
2116 struct ieee80211_sub_if_data *sdata;
2117 struct ieee80211_local *local;
2118 struct ieee80211_key *key;
2123 sdata = vif_to_sdata(vif);
2124 local = sdata->local;
2126 if (WARN_ON(!local->resuming))
2129 if (WARN_ON(vif->type != NL80211_IFTYPE_STATION))
2132 sdata->flags |= IEEE80211_SDATA_DISCONNECT_RESUME;
2134 mutex_lock(&local->key_mtx);
2135 list_for_each_entry(key, &sdata->key_list, list)
2136 key->flags |= KEY_FLAG_TAINTED;
2137 mutex_unlock(&local->key_mtx);
2139 EXPORT_SYMBOL_GPL(ieee80211_resume_disconnect);
2141 void ieee80211_recalc_smps(struct ieee80211_sub_if_data *sdata)
2143 struct ieee80211_local *local = sdata->local;
2144 struct ieee80211_chanctx_conf *chanctx_conf;
2145 struct ieee80211_chanctx *chanctx;
2147 mutex_lock(&local->chanctx_mtx);
2149 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2150 lockdep_is_held(&local->chanctx_mtx));
2153 * This function can be called from a work, thus it may be possible
2154 * that the chanctx_conf is removed (due to a disconnection, for
2156 * So nothing should be done in such case.
2161 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2162 ieee80211_recalc_smps_chanctx(local, chanctx);
2164 mutex_unlock(&local->chanctx_mtx);
2167 void ieee80211_recalc_min_chandef(struct ieee80211_sub_if_data *sdata)
2169 struct ieee80211_local *local = sdata->local;
2170 struct ieee80211_chanctx_conf *chanctx_conf;
2171 struct ieee80211_chanctx *chanctx;
2173 mutex_lock(&local->chanctx_mtx);
2175 chanctx_conf = rcu_dereference_protected(sdata->vif.chanctx_conf,
2176 lockdep_is_held(&local->chanctx_mtx));
2178 if (WARN_ON_ONCE(!chanctx_conf))
2181 chanctx = container_of(chanctx_conf, struct ieee80211_chanctx, conf);
2182 ieee80211_recalc_chanctx_min_def(local, chanctx);
2184 mutex_unlock(&local->chanctx_mtx);
2187 size_t ieee80211_ie_split_vendor(const u8 *ies, size_t ielen, size_t offset)
2189 size_t pos = offset;
2191 while (pos < ielen && ies[pos] != WLAN_EID_VENDOR_SPECIFIC)
2192 pos += 2 + ies[pos + 1];
2197 static void _ieee80211_enable_rssi_reports(struct ieee80211_sub_if_data *sdata,
2201 trace_api_enable_rssi_reports(sdata, rssi_min_thold, rssi_max_thold);
2203 if (WARN_ON(sdata->vif.type != NL80211_IFTYPE_STATION))
2207 * Scale up threshold values before storing it, as the RSSI averaging
2208 * algorithm uses a scaled up value as well. Change this scaling
2209 * factor if the RSSI averaging algorithm changes.
2211 sdata->u.mgd.rssi_min_thold = rssi_min_thold*16;
2212 sdata->u.mgd.rssi_max_thold = rssi_max_thold*16;
2215 void ieee80211_enable_rssi_reports(struct ieee80211_vif *vif,
2219 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2221 WARN_ON(rssi_min_thold == rssi_max_thold ||
2222 rssi_min_thold > rssi_max_thold);
2224 _ieee80211_enable_rssi_reports(sdata, rssi_min_thold,
2227 EXPORT_SYMBOL(ieee80211_enable_rssi_reports);
2229 void ieee80211_disable_rssi_reports(struct ieee80211_vif *vif)
2231 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2233 _ieee80211_enable_rssi_reports(sdata, 0, 0);
2235 EXPORT_SYMBOL(ieee80211_disable_rssi_reports);
2237 u8 *ieee80211_ie_build_ht_cap(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2242 *pos++ = WLAN_EID_HT_CAPABILITY;
2243 *pos++ = sizeof(struct ieee80211_ht_cap);
2244 memset(pos, 0, sizeof(struct ieee80211_ht_cap));
2246 /* capability flags */
2247 tmp = cpu_to_le16(cap);
2248 memcpy(pos, &tmp, sizeof(u16));
2251 /* AMPDU parameters */
2252 *pos++ = ht_cap->ampdu_factor |
2253 (ht_cap->ampdu_density <<
2254 IEEE80211_HT_AMPDU_PARM_DENSITY_SHIFT);
2257 memcpy(pos, &ht_cap->mcs, sizeof(ht_cap->mcs));
2258 pos += sizeof(ht_cap->mcs);
2260 /* extended capabilities */
2261 pos += sizeof(__le16);
2263 /* BF capabilities */
2264 pos += sizeof(__le32);
2266 /* antenna selection */
2272 u8 *ieee80211_ie_build_vht_cap(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2277 *pos++ = WLAN_EID_VHT_CAPABILITY;
2278 *pos++ = sizeof(struct ieee80211_vht_cap);
2279 memset(pos, 0, sizeof(struct ieee80211_vht_cap));
2281 /* capability flags */
2282 tmp = cpu_to_le32(cap);
2283 memcpy(pos, &tmp, sizeof(u32));
2287 memcpy(pos, &vht_cap->vht_mcs, sizeof(vht_cap->vht_mcs));
2288 pos += sizeof(vht_cap->vht_mcs);
2293 u8 *ieee80211_ie_build_ht_oper(u8 *pos, struct ieee80211_sta_ht_cap *ht_cap,
2294 const struct cfg80211_chan_def *chandef,
2295 u16 prot_mode, bool rifs_mode)
2297 struct ieee80211_ht_operation *ht_oper;
2298 /* Build HT Information */
2299 *pos++ = WLAN_EID_HT_OPERATION;
2300 *pos++ = sizeof(struct ieee80211_ht_operation);
2301 ht_oper = (struct ieee80211_ht_operation *)pos;
2302 ht_oper->primary_chan = ieee80211_frequency_to_channel(
2303 chandef->chan->center_freq);
2304 switch (chandef->width) {
2305 case NL80211_CHAN_WIDTH_160:
2306 case NL80211_CHAN_WIDTH_80P80:
2307 case NL80211_CHAN_WIDTH_80:
2308 case NL80211_CHAN_WIDTH_40:
2309 if (chandef->center_freq1 > chandef->chan->center_freq)
2310 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2312 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2315 ht_oper->ht_param = IEEE80211_HT_PARAM_CHA_SEC_NONE;
2318 if (ht_cap->cap & IEEE80211_HT_CAP_SUP_WIDTH_20_40 &&
2319 chandef->width != NL80211_CHAN_WIDTH_20_NOHT &&
2320 chandef->width != NL80211_CHAN_WIDTH_20)
2321 ht_oper->ht_param |= IEEE80211_HT_PARAM_CHAN_WIDTH_ANY;
2324 ht_oper->ht_param |= IEEE80211_HT_PARAM_RIFS_MODE;
2326 ht_oper->operation_mode = cpu_to_le16(prot_mode);
2327 ht_oper->stbc_param = 0x0000;
2329 /* It seems that Basic MCS set and Supported MCS set
2330 are identical for the first 10 bytes */
2331 memset(&ht_oper->basic_set, 0, 16);
2332 memcpy(&ht_oper->basic_set, &ht_cap->mcs, 10);
2334 return pos + sizeof(struct ieee80211_ht_operation);
2337 u8 *ieee80211_ie_build_vht_oper(u8 *pos, struct ieee80211_sta_vht_cap *vht_cap,
2338 const struct cfg80211_chan_def *chandef)
2340 struct ieee80211_vht_operation *vht_oper;
2342 *pos++ = WLAN_EID_VHT_OPERATION;
2343 *pos++ = sizeof(struct ieee80211_vht_operation);
2344 vht_oper = (struct ieee80211_vht_operation *)pos;
2345 vht_oper->center_freq_seg1_idx = ieee80211_frequency_to_channel(
2346 chandef->center_freq1);
2347 if (chandef->center_freq2)
2348 vht_oper->center_freq_seg2_idx =
2349 ieee80211_frequency_to_channel(chandef->center_freq2);
2351 vht_oper->center_freq_seg2_idx = 0x00;
2353 switch (chandef->width) {
2354 case NL80211_CHAN_WIDTH_160:
2355 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_160MHZ;
2357 case NL80211_CHAN_WIDTH_80P80:
2358 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80P80MHZ;
2360 case NL80211_CHAN_WIDTH_80:
2361 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_80MHZ;
2364 vht_oper->chan_width = IEEE80211_VHT_CHANWIDTH_USE_HT;
2368 /* don't require special VHT peer rates */
2369 vht_oper->basic_mcs_set = cpu_to_le16(0xffff);
2371 return pos + sizeof(struct ieee80211_vht_operation);
2374 void ieee80211_ht_oper_to_chandef(struct ieee80211_channel *control_chan,
2375 const struct ieee80211_ht_operation *ht_oper,
2376 struct cfg80211_chan_def *chandef)
2378 enum nl80211_channel_type channel_type;
2381 cfg80211_chandef_create(chandef, control_chan,
2382 NL80211_CHAN_NO_HT);
2386 switch (ht_oper->ht_param & IEEE80211_HT_PARAM_CHA_SEC_OFFSET) {
2387 case IEEE80211_HT_PARAM_CHA_SEC_NONE:
2388 channel_type = NL80211_CHAN_HT20;
2390 case IEEE80211_HT_PARAM_CHA_SEC_ABOVE:
2391 channel_type = NL80211_CHAN_HT40PLUS;
2393 case IEEE80211_HT_PARAM_CHA_SEC_BELOW:
2394 channel_type = NL80211_CHAN_HT40MINUS;
2397 channel_type = NL80211_CHAN_NO_HT;
2400 cfg80211_chandef_create(chandef, control_chan, channel_type);
2403 void ieee80211_vht_oper_to_chandef(struct ieee80211_channel *control_chan,
2404 const struct ieee80211_vht_operation *oper,
2405 struct cfg80211_chan_def *chandef)
2410 chandef->chan = control_chan;
2412 switch (oper->chan_width) {
2413 case IEEE80211_VHT_CHANWIDTH_USE_HT:
2415 case IEEE80211_VHT_CHANWIDTH_80MHZ:
2416 chandef->width = NL80211_CHAN_WIDTH_80;
2418 case IEEE80211_VHT_CHANWIDTH_160MHZ:
2419 chandef->width = NL80211_CHAN_WIDTH_160;
2421 case IEEE80211_VHT_CHANWIDTH_80P80MHZ:
2422 chandef->width = NL80211_CHAN_WIDTH_80P80;
2428 chandef->center_freq1 =
2429 ieee80211_channel_to_frequency(oper->center_freq_seg1_idx,
2430 control_chan->band);
2431 chandef->center_freq2 =
2432 ieee80211_channel_to_frequency(oper->center_freq_seg2_idx,
2433 control_chan->band);
2436 int ieee80211_parse_bitrates(struct cfg80211_chan_def *chandef,
2437 const struct ieee80211_supported_band *sband,
2438 const u8 *srates, int srates_len, u32 *rates)
2440 u32 rate_flags = ieee80211_chandef_rate_flags(chandef);
2441 int shift = ieee80211_chandef_get_shift(chandef);
2442 struct ieee80211_rate *br;
2443 int brate, rate, i, j, count = 0;
2447 for (i = 0; i < srates_len; i++) {
2448 rate = srates[i] & 0x7f;
2450 for (j = 0; j < sband->n_bitrates; j++) {
2451 br = &sband->bitrates[j];
2452 if ((rate_flags & br->flags) != rate_flags)
2455 brate = DIV_ROUND_UP(br->bitrate, (1 << shift) * 5);
2456 if (brate == rate) {
2466 int ieee80211_add_srates_ie(struct ieee80211_sub_if_data *sdata,
2467 struct sk_buff *skb, bool need_basic,
2468 enum ieee80211_band band)
2470 struct ieee80211_local *local = sdata->local;
2471 struct ieee80211_supported_band *sband;
2474 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2477 shift = ieee80211_vif_get_shift(&sdata->vif);
2478 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2479 sband = local->hw.wiphy->bands[band];
2481 for (i = 0; i < sband->n_bitrates; i++) {
2482 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2489 if (skb_tailroom(skb) < rates + 2)
2492 pos = skb_put(skb, rates + 2);
2493 *pos++ = WLAN_EID_SUPP_RATES;
2495 for (i = 0; i < rates; i++) {
2497 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2500 if (need_basic && basic_rates & BIT(i))
2502 rate = sband->bitrates[i].bitrate;
2503 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2505 *pos++ = basic | (u8) rate;
2511 int ieee80211_add_ext_srates_ie(struct ieee80211_sub_if_data *sdata,
2512 struct sk_buff *skb, bool need_basic,
2513 enum ieee80211_band band)
2515 struct ieee80211_local *local = sdata->local;
2516 struct ieee80211_supported_band *sband;
2518 u8 i, exrates, *pos;
2519 u32 basic_rates = sdata->vif.bss_conf.basic_rates;
2522 rate_flags = ieee80211_chandef_rate_flags(&sdata->vif.bss_conf.chandef);
2523 shift = ieee80211_vif_get_shift(&sdata->vif);
2525 sband = local->hw.wiphy->bands[band];
2527 for (i = 0; i < sband->n_bitrates; i++) {
2528 if ((rate_flags & sband->bitrates[i].flags) != rate_flags)
2538 if (skb_tailroom(skb) < exrates + 2)
2542 pos = skb_put(skb, exrates + 2);
2543 *pos++ = WLAN_EID_EXT_SUPP_RATES;
2545 for (i = 8; i < sband->n_bitrates; i++) {
2547 if ((rate_flags & sband->bitrates[i].flags)
2550 if (need_basic && basic_rates & BIT(i))
2552 rate = DIV_ROUND_UP(sband->bitrates[i].bitrate,
2554 *pos++ = basic | (u8) rate;
2560 int ieee80211_ave_rssi(struct ieee80211_vif *vif)
2562 struct ieee80211_sub_if_data *sdata = vif_to_sdata(vif);
2563 struct ieee80211_if_managed *ifmgd = &sdata->u.mgd;
2565 if (WARN_ON_ONCE(sdata->vif.type != NL80211_IFTYPE_STATION)) {
2566 /* non-managed type inferfaces */
2569 return -ewma_beacon_signal_read(&ifmgd->ave_beacon_signal);
2571 EXPORT_SYMBOL_GPL(ieee80211_ave_rssi);
2573 u8 ieee80211_mcs_to_chains(const struct ieee80211_mcs_info *mcs)
2578 /* TODO: consider rx_highest */
2580 if (mcs->rx_mask[3])
2582 if (mcs->rx_mask[2])
2584 if (mcs->rx_mask[1])
2590 * ieee80211_calculate_rx_timestamp - calculate timestamp in frame
2591 * @local: mac80211 hw info struct
2592 * @status: RX status
2593 * @mpdu_len: total MPDU length (including FCS)
2594 * @mpdu_offset: offset into MPDU to calculate timestamp at
2596 * This function calculates the RX timestamp at the given MPDU offset, taking
2597 * into account what the RX timestamp was. An offset of 0 will just normalize
2598 * the timestamp to TSF at beginning of MPDU reception.
2600 u64 ieee80211_calculate_rx_timestamp(struct ieee80211_local *local,
2601 struct ieee80211_rx_status *status,
2602 unsigned int mpdu_len,
2603 unsigned int mpdu_offset)
2605 u64 ts = status->mactime;
2606 struct rate_info ri;
2609 if (WARN_ON(!ieee80211_have_rx_timestamp(status)))
2612 memset(&ri, 0, sizeof(ri));
2614 /* Fill cfg80211 rate info */
2615 if (status->flag & RX_FLAG_HT) {
2616 ri.mcs = status->rate_idx;
2617 ri.flags |= RATE_INFO_FLAGS_MCS;
2618 if (status->flag & RX_FLAG_40MHZ)
2619 ri.bw = RATE_INFO_BW_40;
2621 ri.bw = RATE_INFO_BW_20;
2622 if (status->flag & RX_FLAG_SHORT_GI)
2623 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2624 } else if (status->flag & RX_FLAG_VHT) {
2625 ri.flags |= RATE_INFO_FLAGS_VHT_MCS;
2626 ri.mcs = status->rate_idx;
2627 ri.nss = status->vht_nss;
2628 if (status->flag & RX_FLAG_40MHZ)
2629 ri.bw = RATE_INFO_BW_40;
2630 else if (status->vht_flag & RX_VHT_FLAG_80MHZ)
2631 ri.bw = RATE_INFO_BW_80;
2632 else if (status->vht_flag & RX_VHT_FLAG_160MHZ)
2633 ri.bw = RATE_INFO_BW_160;
2635 ri.bw = RATE_INFO_BW_20;
2636 if (status->flag & RX_FLAG_SHORT_GI)
2637 ri.flags |= RATE_INFO_FLAGS_SHORT_GI;
2639 struct ieee80211_supported_band *sband;
2643 if (status->flag & RX_FLAG_10MHZ) {
2645 ri.bw = RATE_INFO_BW_10;
2646 } else if (status->flag & RX_FLAG_5MHZ) {
2648 ri.bw = RATE_INFO_BW_5;
2650 ri.bw = RATE_INFO_BW_20;
2653 sband = local->hw.wiphy->bands[status->band];
2654 bitrate = sband->bitrates[status->rate_idx].bitrate;
2655 ri.legacy = DIV_ROUND_UP(bitrate, (1 << shift));
2658 rate = cfg80211_calculate_bitrate(&ri);
2659 if (WARN_ONCE(!rate,
2660 "Invalid bitrate: flags=0x%x, idx=%d, vht_nss=%d\n",
2661 status->flag, status->rate_idx, status->vht_nss))
2664 /* rewind from end of MPDU */
2665 if (status->flag & RX_FLAG_MACTIME_END)
2666 ts -= mpdu_len * 8 * 10 / rate;
2668 ts += mpdu_offset * 8 * 10 / rate;
2673 void ieee80211_dfs_cac_cancel(struct ieee80211_local *local)
2675 struct ieee80211_sub_if_data *sdata;
2676 struct cfg80211_chan_def chandef;
2678 mutex_lock(&local->mtx);
2679 mutex_lock(&local->iflist_mtx);
2680 list_for_each_entry(sdata, &local->interfaces, list) {
2681 /* it might be waiting for the local->mtx, but then
2682 * by the time it gets it, sdata->wdev.cac_started
2683 * will no longer be true
2685 cancel_delayed_work(&sdata->dfs_cac_timer_work);
2687 if (sdata->wdev.cac_started) {
2688 chandef = sdata->vif.bss_conf.chandef;
2689 ieee80211_vif_release_channel(sdata);
2690 cfg80211_cac_event(sdata->dev,
2692 NL80211_RADAR_CAC_ABORTED,
2696 mutex_unlock(&local->iflist_mtx);
2697 mutex_unlock(&local->mtx);
2700 void ieee80211_dfs_radar_detected_work(struct work_struct *work)
2702 struct ieee80211_local *local =
2703 container_of(work, struct ieee80211_local, radar_detected_work);
2704 struct cfg80211_chan_def chandef = local->hw.conf.chandef;
2705 struct ieee80211_chanctx *ctx;
2706 int num_chanctx = 0;
2708 mutex_lock(&local->chanctx_mtx);
2709 list_for_each_entry(ctx, &local->chanctx_list, list) {
2710 if (ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER)
2714 chandef = ctx->conf.def;
2716 mutex_unlock(&local->chanctx_mtx);
2718 ieee80211_dfs_cac_cancel(local);
2720 if (num_chanctx > 1)
2721 /* XXX: multi-channel is not supported yet */
2724 cfg80211_radar_event(local->hw.wiphy, &chandef, GFP_KERNEL);
2727 void ieee80211_radar_detected(struct ieee80211_hw *hw)
2729 struct ieee80211_local *local = hw_to_local(hw);
2731 trace_api_radar_detected(local);
2733 ieee80211_queue_work(hw, &local->radar_detected_work);
2735 EXPORT_SYMBOL(ieee80211_radar_detected);
2737 u32 ieee80211_chandef_downgrade(struct cfg80211_chan_def *c)
2743 case NL80211_CHAN_WIDTH_20:
2744 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2745 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2747 case NL80211_CHAN_WIDTH_40:
2748 c->width = NL80211_CHAN_WIDTH_20;
2749 c->center_freq1 = c->chan->center_freq;
2750 ret = IEEE80211_STA_DISABLE_40MHZ |
2751 IEEE80211_STA_DISABLE_VHT;
2753 case NL80211_CHAN_WIDTH_80:
2754 tmp = (30 + c->chan->center_freq - c->center_freq1)/20;
2758 c->center_freq1 = c->center_freq1 - 20 + 40 * tmp;
2759 c->width = NL80211_CHAN_WIDTH_40;
2760 ret = IEEE80211_STA_DISABLE_VHT;
2762 case NL80211_CHAN_WIDTH_80P80:
2763 c->center_freq2 = 0;
2764 c->width = NL80211_CHAN_WIDTH_80;
2765 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2766 IEEE80211_STA_DISABLE_160MHZ;
2768 case NL80211_CHAN_WIDTH_160:
2770 tmp = (70 + c->chan->center_freq - c->center_freq1)/20;
2773 c->center_freq1 = c->center_freq1 - 40 + 80 * tmp;
2774 c->width = NL80211_CHAN_WIDTH_80;
2775 ret = IEEE80211_STA_DISABLE_80P80MHZ |
2776 IEEE80211_STA_DISABLE_160MHZ;
2779 case NL80211_CHAN_WIDTH_20_NOHT:
2781 c->width = NL80211_CHAN_WIDTH_20_NOHT;
2782 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2784 case NL80211_CHAN_WIDTH_5:
2785 case NL80211_CHAN_WIDTH_10:
2788 ret = IEEE80211_STA_DISABLE_HT | IEEE80211_STA_DISABLE_VHT;
2792 WARN_ON_ONCE(!cfg80211_chandef_valid(c));
2798 * Returns true if smps_mode_new is strictly more restrictive than
2801 bool ieee80211_smps_is_restrictive(enum ieee80211_smps_mode smps_mode_old,
2802 enum ieee80211_smps_mode smps_mode_new)
2804 if (WARN_ON_ONCE(smps_mode_old == IEEE80211_SMPS_AUTOMATIC ||
2805 smps_mode_new == IEEE80211_SMPS_AUTOMATIC))
2808 switch (smps_mode_old) {
2809 case IEEE80211_SMPS_STATIC:
2811 case IEEE80211_SMPS_DYNAMIC:
2812 return smps_mode_new == IEEE80211_SMPS_STATIC;
2813 case IEEE80211_SMPS_OFF:
2814 return smps_mode_new != IEEE80211_SMPS_OFF;
2822 int ieee80211_send_action_csa(struct ieee80211_sub_if_data *sdata,
2823 struct cfg80211_csa_settings *csa_settings)
2825 struct sk_buff *skb;
2826 struct ieee80211_mgmt *mgmt;
2827 struct ieee80211_local *local = sdata->local;
2829 int hdr_len = offsetof(struct ieee80211_mgmt, u.action.u.chan_switch) +
2830 sizeof(mgmt->u.action.u.chan_switch);
2833 if (sdata->vif.type != NL80211_IFTYPE_ADHOC &&
2834 sdata->vif.type != NL80211_IFTYPE_MESH_POINT)
2837 skb = dev_alloc_skb(local->tx_headroom + hdr_len +
2838 5 + /* channel switch announcement element */
2839 3 + /* secondary channel offset element */
2840 8); /* mesh channel switch parameters element */
2844 skb_reserve(skb, local->tx_headroom);
2845 mgmt = (struct ieee80211_mgmt *)skb_put(skb, hdr_len);
2846 memset(mgmt, 0, hdr_len);
2847 mgmt->frame_control = cpu_to_le16(IEEE80211_FTYPE_MGMT |
2848 IEEE80211_STYPE_ACTION);
2850 eth_broadcast_addr(mgmt->da);
2851 memcpy(mgmt->sa, sdata->vif.addr, ETH_ALEN);
2852 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2853 memcpy(mgmt->bssid, sdata->vif.addr, ETH_ALEN);
2855 struct ieee80211_if_ibss *ifibss = &sdata->u.ibss;
2856 memcpy(mgmt->bssid, ifibss->bssid, ETH_ALEN);
2858 mgmt->u.action.category = WLAN_CATEGORY_SPECTRUM_MGMT;
2859 mgmt->u.action.u.chan_switch.action_code = WLAN_ACTION_SPCT_CHL_SWITCH;
2860 pos = skb_put(skb, 5);
2861 *pos++ = WLAN_EID_CHANNEL_SWITCH; /* EID */
2862 *pos++ = 3; /* IE length */
2863 *pos++ = csa_settings->block_tx ? 1 : 0; /* CSA mode */
2864 freq = csa_settings->chandef.chan->center_freq;
2865 *pos++ = ieee80211_frequency_to_channel(freq); /* channel */
2866 *pos++ = csa_settings->count; /* count */
2868 if (csa_settings->chandef.width == NL80211_CHAN_WIDTH_40) {
2869 enum nl80211_channel_type ch_type;
2872 *pos++ = WLAN_EID_SECONDARY_CHANNEL_OFFSET; /* EID */
2873 *pos++ = 1; /* IE length */
2874 ch_type = cfg80211_get_chandef_type(&csa_settings->chandef);
2875 if (ch_type == NL80211_CHAN_HT40PLUS)
2876 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_ABOVE;
2878 *pos++ = IEEE80211_HT_PARAM_CHA_SEC_BELOW;
2881 if (ieee80211_vif_is_mesh(&sdata->vif)) {
2882 struct ieee80211_if_mesh *ifmsh = &sdata->u.mesh;
2885 *pos++ = WLAN_EID_CHAN_SWITCH_PARAM; /* EID */
2886 *pos++ = 6; /* IE length */
2887 *pos++ = sdata->u.mesh.mshcfg.dot11MeshTTL; /* Mesh TTL */
2888 *pos = 0x00; /* Mesh Flag: Tx Restrict, Initiator, Reason */
2889 *pos |= WLAN_EID_CHAN_SWITCH_PARAM_INITIATOR;
2890 *pos++ |= csa_settings->block_tx ?
2891 WLAN_EID_CHAN_SWITCH_PARAM_TX_RESTRICT : 0x00;
2892 put_unaligned_le16(WLAN_REASON_MESH_CHAN, pos); /* Reason Cd */
2894 put_unaligned_le16(ifmsh->pre_value, pos);/* Precedence Value */
2898 ieee80211_tx_skb(sdata, skb);
2902 bool ieee80211_cs_valid(const struct ieee80211_cipher_scheme *cs)
2904 return !(cs == NULL || cs->cipher == 0 ||
2905 cs->hdr_len < cs->pn_len + cs->pn_off ||
2906 cs->hdr_len <= cs->key_idx_off ||
2907 cs->key_idx_shift > 7 ||
2908 cs->key_idx_mask == 0);
2911 bool ieee80211_cs_list_valid(const struct ieee80211_cipher_scheme *cs, int n)
2915 /* Ensure we have enough iftype bitmap space for all iftype values */
2916 WARN_ON((NUM_NL80211_IFTYPES / 8 + 1) > sizeof(cs[0].iftype));
2918 for (i = 0; i < n; i++)
2919 if (!ieee80211_cs_valid(&cs[i]))
2925 const struct ieee80211_cipher_scheme *
2926 ieee80211_cs_get(struct ieee80211_local *local, u32 cipher,
2927 enum nl80211_iftype iftype)
2929 const struct ieee80211_cipher_scheme *l = local->hw.cipher_schemes;
2930 int n = local->hw.n_cipher_schemes;
2932 const struct ieee80211_cipher_scheme *cs = NULL;
2934 for (i = 0; i < n; i++) {
2935 if (l[i].cipher == cipher) {
2941 if (!cs || !(cs->iftype & BIT(iftype)))
2947 int ieee80211_cs_headroom(struct ieee80211_local *local,
2948 struct cfg80211_crypto_settings *crypto,
2949 enum nl80211_iftype iftype)
2951 const struct ieee80211_cipher_scheme *cs;
2952 int headroom = IEEE80211_ENCRYPT_HEADROOM;
2955 for (i = 0; i < crypto->n_ciphers_pairwise; i++) {
2956 cs = ieee80211_cs_get(local, crypto->ciphers_pairwise[i],
2959 if (cs && headroom < cs->hdr_len)
2960 headroom = cs->hdr_len;
2963 cs = ieee80211_cs_get(local, crypto->cipher_group, iftype);
2964 if (cs && headroom < cs->hdr_len)
2965 headroom = cs->hdr_len;
2971 ieee80211_extend_noa_desc(struct ieee80211_noa_data *data, u32 tsf, int i)
2973 s32 end = data->desc[i].start + data->desc[i].duration - (tsf + 1);
2980 if (data->count[i] == 1)
2983 if (data->desc[i].interval == 0)
2986 /* End time is in the past, check for repetitions */
2987 skip = DIV_ROUND_UP(-end, data->desc[i].interval);
2988 if (data->count[i] < 255) {
2989 if (data->count[i] <= skip) {
2994 data->count[i] -= skip;
2997 data->desc[i].start += skip * data->desc[i].interval;
3003 ieee80211_extend_absent_time(struct ieee80211_noa_data *data, u32 tsf,
3009 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3012 if (!data->count[i])
3015 if (ieee80211_extend_noa_desc(data, tsf + *offset, i))
3018 cur = data->desc[i].start - tsf;
3022 cur = data->desc[i].start + data->desc[i].duration - tsf;
3031 ieee80211_get_noa_absent_time(struct ieee80211_noa_data *data, u32 tsf)
3036 * arbitrary limit, used to avoid infinite loops when combined NoA
3037 * descriptors cover the full time period.
3041 ieee80211_extend_absent_time(data, tsf, &offset);
3043 if (!ieee80211_extend_absent_time(data, tsf, &offset))
3047 } while (tries < max_tries);
3052 void ieee80211_update_p2p_noa(struct ieee80211_noa_data *data, u32 tsf)
3054 u32 next_offset = BIT(31) - 1;
3058 data->has_next_tsf = false;
3059 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3062 if (!data->count[i])
3065 ieee80211_extend_noa_desc(data, tsf, i);
3066 start = data->desc[i].start - tsf;
3068 data->absent |= BIT(i);
3070 if (next_offset > start)
3071 next_offset = start;
3073 data->has_next_tsf = true;
3077 next_offset = ieee80211_get_noa_absent_time(data, tsf);
3079 data->next_tsf = tsf + next_offset;
3081 EXPORT_SYMBOL(ieee80211_update_p2p_noa);
3083 int ieee80211_parse_p2p_noa(const struct ieee80211_p2p_noa_attr *attr,
3084 struct ieee80211_noa_data *data, u32 tsf)
3089 memset(data, 0, sizeof(*data));
3091 for (i = 0; i < IEEE80211_P2P_NOA_DESC_MAX; i++) {
3092 const struct ieee80211_p2p_noa_desc *desc = &attr->desc[i];
3094 if (!desc->count || !desc->duration)
3097 data->count[i] = desc->count;
3098 data->desc[i].start = le32_to_cpu(desc->start_time);
3099 data->desc[i].duration = le32_to_cpu(desc->duration);
3100 data->desc[i].interval = le32_to_cpu(desc->interval);
3102 if (data->count[i] > 1 &&
3103 data->desc[i].interval < data->desc[i].duration)
3106 ieee80211_extend_noa_desc(data, tsf, i);
3111 ieee80211_update_p2p_noa(data, tsf);
3115 EXPORT_SYMBOL(ieee80211_parse_p2p_noa);
3117 void ieee80211_recalc_dtim(struct ieee80211_local *local,
3118 struct ieee80211_sub_if_data *sdata)
3120 u64 tsf = drv_get_tsf(local, sdata);
3122 u16 beacon_int = sdata->vif.bss_conf.beacon_int * 1024;
3123 u8 dtim_period = sdata->vif.bss_conf.dtim_period;
3127 if (tsf == -1ULL || !beacon_int || !dtim_period)
3130 if (sdata->vif.type == NL80211_IFTYPE_AP ||
3131 sdata->vif.type == NL80211_IFTYPE_AP_VLAN) {
3135 ps = &sdata->bss->ps;
3136 } else if (ieee80211_vif_is_mesh(&sdata->vif)) {
3137 ps = &sdata->u.mesh.ps;
3143 * actually finds last dtim_count, mac80211 will update in
3144 * __beacon_add_tim().
3145 * dtim_count = dtim_period - (tsf / bcn_int) % dtim_period
3147 do_div(tsf, beacon_int);
3148 bcns_from_dtim = do_div(tsf, dtim_period);
3149 /* just had a DTIM */
3150 if (!bcns_from_dtim)
3153 dtim_count = dtim_period - bcns_from_dtim;
3155 ps->dtim_count = dtim_count;
3158 static u8 ieee80211_chanctx_radar_detect(struct ieee80211_local *local,
3159 struct ieee80211_chanctx *ctx)
3161 struct ieee80211_sub_if_data *sdata;
3162 u8 radar_detect = 0;
3164 lockdep_assert_held(&local->chanctx_mtx);
3166 if (WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED))
3169 list_for_each_entry(sdata, &ctx->reserved_vifs, reserved_chanctx_list)
3170 if (sdata->reserved_radar_required)
3171 radar_detect |= BIT(sdata->reserved_chandef.width);
3174 * An in-place reservation context should not have any assigned vifs
3175 * until it replaces the other context.
3177 WARN_ON(ctx->replace_state == IEEE80211_CHANCTX_REPLACES_OTHER &&
3178 !list_empty(&ctx->assigned_vifs));
3180 list_for_each_entry(sdata, &ctx->assigned_vifs, assigned_chanctx_list)
3181 if (sdata->radar_required)
3182 radar_detect |= BIT(sdata->vif.bss_conf.chandef.width);
3184 return radar_detect;
3187 int ieee80211_check_combinations(struct ieee80211_sub_if_data *sdata,
3188 const struct cfg80211_chan_def *chandef,
3189 enum ieee80211_chanctx_mode chanmode,
3192 struct ieee80211_local *local = sdata->local;
3193 struct ieee80211_sub_if_data *sdata_iter;
3194 enum nl80211_iftype iftype = sdata->wdev.iftype;
3195 int num[NUM_NL80211_IFTYPES];
3196 struct ieee80211_chanctx *ctx;
3197 int num_different_channels = 0;
3200 lockdep_assert_held(&local->chanctx_mtx);
3202 if (WARN_ON(hweight32(radar_detect) > 1))
3205 if (WARN_ON(chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3210 num_different_channels = 1;
3212 if (WARN_ON(iftype >= NUM_NL80211_IFTYPES))
3215 /* Always allow software iftypes */
3216 if (local->hw.wiphy->software_iftypes & BIT(iftype)) {
3222 memset(num, 0, sizeof(num));
3224 if (iftype != NL80211_IFTYPE_UNSPECIFIED)
3227 list_for_each_entry(ctx, &local->chanctx_list, list) {
3228 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3230 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3231 if (ctx->mode == IEEE80211_CHANCTX_EXCLUSIVE) {
3232 num_different_channels++;
3235 if (chandef && chanmode == IEEE80211_CHANCTX_SHARED &&
3236 cfg80211_chandef_compatible(chandef,
3239 num_different_channels++;
3242 list_for_each_entry_rcu(sdata_iter, &local->interfaces, list) {
3243 struct wireless_dev *wdev_iter;
3245 wdev_iter = &sdata_iter->wdev;
3247 if (sdata_iter == sdata ||
3248 !ieee80211_sdata_running(sdata_iter) ||
3249 local->hw.wiphy->software_iftypes & BIT(wdev_iter->iftype))
3252 num[wdev_iter->iftype]++;
3256 if (total == 1 && !radar_detect)
3259 return cfg80211_check_combinations(local->hw.wiphy,
3260 num_different_channels,
3265 ieee80211_iter_max_chans(const struct ieee80211_iface_combination *c,
3268 u32 *max_num_different_channels = data;
3270 *max_num_different_channels = max(*max_num_different_channels,
3271 c->num_different_channels);
3274 int ieee80211_max_num_channels(struct ieee80211_local *local)
3276 struct ieee80211_sub_if_data *sdata;
3277 int num[NUM_NL80211_IFTYPES] = {};
3278 struct ieee80211_chanctx *ctx;
3279 int num_different_channels = 0;
3280 u8 radar_detect = 0;
3281 u32 max_num_different_channels = 1;
3284 lockdep_assert_held(&local->chanctx_mtx);
3286 list_for_each_entry(ctx, &local->chanctx_list, list) {
3287 if (ctx->replace_state == IEEE80211_CHANCTX_WILL_BE_REPLACED)
3290 num_different_channels++;
3292 radar_detect |= ieee80211_chanctx_radar_detect(local, ctx);
3295 list_for_each_entry_rcu(sdata, &local->interfaces, list)
3296 num[sdata->wdev.iftype]++;
3298 err = cfg80211_iter_combinations(local->hw.wiphy,
3299 num_different_channels, radar_detect,
3300 num, ieee80211_iter_max_chans,
3301 &max_num_different_channels);
3305 return max_num_different_channels;
3308 u8 *ieee80211_add_wmm_info_ie(u8 *buf, u8 qosinfo)
3310 *buf++ = WLAN_EID_VENDOR_SPECIFIC;
3311 *buf++ = 7; /* len */
3312 *buf++ = 0x00; /* Microsoft OUI 00:50:F2 */
3315 *buf++ = 2; /* WME */
3316 *buf++ = 0; /* WME info */
3317 *buf++ = 1; /* WME ver */
3318 *buf++ = qosinfo; /* U-APSD no in use */
3323 void ieee80211_init_tx_queue(struct ieee80211_sub_if_data *sdata,
3324 struct sta_info *sta,
3325 struct txq_info *txqi, int tid)
3327 skb_queue_head_init(&txqi->queue);
3328 txqi->txq.vif = &sdata->vif;
3331 txqi->txq.sta = &sta->sta;
3332 sta->sta.txq[tid] = &txqi->txq;
3333 txqi->txq.tid = tid;
3334 txqi->txq.ac = ieee802_1d_to_ac[tid & 7];
3336 sdata->vif.txq = &txqi->txq;
3338 txqi->txq.ac = IEEE80211_AC_BE;